Merge branch 'master' into gitee_master

403 files changed, 734 insertions, 6820 deletions

diff --git a/components/drivers/Kconfig b/components/drivers/Kconfig
index 5408761c6a..4ebde15125 100755
--- a/components/drivers/Kconfig
+++ b/components/drivers/Kconfig
@@ -111,6 +111,10 @@ config RT_USING_ADC
     bool "Using ADC device drivers"
     default n
 
+config RT_USING_DAC
+    bool "Using DAC device drivers"
+    default n
+    
 config RT_USING_PWM
     bool "Using PWM device drivers"
     default n
diff --git a/components/drivers/include/drivers/dac.h b/components/drivers/include/drivers/dac.h
new file mode 100644
index 0000000000..b6043348dc
--- /dev/null
+++ b/components/drivers/include/drivers/dac.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2020-06-19     thread-liu   the first version
+ */
+
+#ifndef __DAC_H__
+#define __DAC_H__
+#include <rtthread.h>
+
+struct rt_dac_device;
+struct rt_dac_ops
+{
+    rt_err_t (*disabled)(struct rt_dac_device *device, rt_uint32_t channel);
+    rt_err_t (*enabled)(struct rt_dac_device *device, rt_uint32_t channel);
+    rt_err_t (*convert)(struct rt_dac_device *device, rt_uint32_t channel, rt_uint32_t *value);
+};
+
+struct rt_dac_device
+{
+    struct rt_device parent;
+    const struct rt_dac_ops *ops;
+};
+typedef struct rt_dac_device *rt_dac_device_t;
+
+typedef enum
+{
+    RT_DAC_CMD_ENABLE,
+    RT_DAC_CMD_DISABLE,
+} rt_dac_cmd_t;
+
+rt_err_t rt_hw_dac_register(rt_dac_device_t dac,const char *name, const struct rt_dac_ops *ops, const void *user_data);
+
+rt_uint32_t rt_dac_write(rt_dac_device_t dev, rt_uint32_t channel, rt_uint32_t value);
+rt_err_t rt_dac_enable(rt_dac_device_t dev, rt_uint32_t channel);
+rt_err_t rt_dac_disable(rt_dac_device_t dev, rt_uint32_t channel);
+
+#endif /* __dac_H__ */
diff --git a/components/drivers/include/rtdevice.h b/components/drivers/include/rtdevice.h
index 623c085430..f54290097c 100644
--- a/components/drivers/include/rtdevice.h
+++ b/components/drivers/include/rtdevice.h
@@ -103,6 +103,10 @@ extern "C" {
 #include "drivers/adc.h"
 #endif
 
+#ifdef RT_USING_DAC
+#include "drivers/dac.h"
+#endif
+
 #ifdef RT_USING_PWM
 #include "drivers/rt_drv_pwm.h"
 #endif
diff --git a/components/drivers/misc/SConscript b/components/drivers/misc/SConscript
index 8a9fdb5eb9..72058eeeca 100644
--- a/components/drivers/misc/SConscript
+++ b/components/drivers/misc/SConscript
@@ -11,6 +11,9 @@ if GetDepend(['RT_USING_PIN']):
 if GetDepend(['RT_USING_ADC']):
     src = src + ['adc.c']
     
+if GetDepend(['RT_USING_DAC']):
+    src = src + ['dac.c']
+
 if GetDepend(['RT_USING_PWM']):
     src = src + ['rt_drv_pwm.c']
     
diff --git a/components/drivers/misc/dac.c b/components/drivers/misc/dac.c
new file mode 100644
index 0000000000..336c78d018
--- /dev/null
+++ b/components/drivers/misc/dac.c
@@ -0,0 +1,231 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2020-06-19     thread-liu   the first version
+ */
+
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#include <string.h>
+#include <stdlib.h>
+
+#define DBG_TAG "dac"
+#define DBG_LVL DBG_INFO
+#include <rtdbg.h>
+
+static rt_size_t _dac_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
+{
+    rt_err_t result = RT_EOK;
+    rt_size_t i;
+    struct rt_dac_device *dac = (struct rt_dac_device *)dev;
+    rt_uint32_t *value = (rt_uint32_t *)buffer;
+
+    for (i = 0; i < size; i += sizeof(int))
+    {
+        result = dac->ops->convert(dac, pos + i, value);
+        if (result != RT_EOK)
+        {
+            return 0;
+        }
+        value++;
+    }
+
+    return i;
+}
+
+static rt_err_t _dac_control(rt_device_t dev, int cmd, void *args)
+{
+    rt_err_t result = RT_EOK;
+    rt_dac_device_t dac = (struct rt_dac_device *)dev;
+
+    if (dac->ops->enabled == RT_NULL)
+    {
+        return -RT_ENOSYS;
+    }
+    if (cmd == RT_DAC_CMD_ENABLE)
+    {
+        result = dac->ops->enabled(dac, (rt_uint32_t)args);
+    }
+    else if (cmd == RT_DAC_CMD_DISABLE)
+    {
+        result = dac->ops->disabled(dac, (rt_uint32_t)args);
+    }
+
+    return result;
+}
+
+#ifdef RT_USING_DEVICE_OPS
+const static struct rt_device_ops dac_ops =
+{
+    RT_NULL,
+    RT_NULL,
+    RT_NULL,
+    RT_NULL,
+    _dac_write,
+    _dac_control,
+};
+#endif
+
+rt_err_t rt_hw_dac_register(rt_dac_device_t device, const char *name, const struct rt_dac_ops *ops, const void *user_data)
+{
+    rt_err_t result = RT_EOK;
+    RT_ASSERT(ops != RT_NULL && ops->convert != RT_NULL);
+
+    device->parent.type = RT_Device_Class_Miscellaneous;
+    device->parent.rx_indicate = RT_NULL;
+    device->parent.tx_complete = RT_NULL;
+
+#ifdef RT_USING_DEVICE_OPS
+    device->parent.ops         = &dac_ops;
+#else
+    device->parent.init        = RT_NULL;
+    device->parent.open        = RT_NULL;
+    device->parent.close       = RT_NULL;
+    device->parent.read        = RT_NULL;
+    device->parent.write       = _dac_write;
+    device->parent.control     = _dac_control;
+#endif
+    device->ops = ops;
+    device->parent.user_data = (void *)user_data;
+
+    result = rt_device_register(&device->parent, name, RT_DEVICE_FLAG_RDWR);
+
+    return result;
+}
+
+rt_uint32_t rt_dac_write(rt_dac_device_t dev, rt_uint32_t channel, rt_uint32_t value)
+{
+    RT_ASSERT(dev);
+
+    dev->ops->convert(dev, channel, &value);
+
+    return RT_EOK;
+}
+
+rt_err_t rt_dac_enable(rt_dac_device_t dev, rt_uint32_t channel)
+{
+    rt_err_t result = RT_EOK;
+
+    RT_ASSERT(dev);
+    if (dev->ops->enabled != RT_NULL)
+    {
+        result = dev->ops->enabled(dev, channel);
+    }
+    else
+    {
+        result = -RT_ENOSYS;
+    }
+
+    return result;
+}
+
+rt_err_t rt_dac_disabled(rt_dac_device_t dev, rt_uint32_t channel)
+{
+    rt_err_t result = RT_EOK;
+
+    RT_ASSERT(dev);
+    if (dev->ops->disabled != RT_NULL)
+    {
+        result = dev->ops->disabled(dev, channel);
+    }
+    else
+    {
+        result = -RT_ENOSYS;
+    }
+
+    return result;
+}
+
+#ifdef FINSH_USING_MSH
+
+static int dac(int argc, char **argv)
+{
+    int result = RT_EOK;
+    static rt_dac_device_t dac_device = RT_NULL;
+    char *result_str;
+    
+    if (argc > 1)
+    {
+        if (!strcmp(argv[1], "probe"))
+        {
+            if (argc == 3)
+            {
+                dac_device = (rt_dac_device_t)rt_device_find(argv[2]);
+                result_str = (dac_device == RT_NULL) ? "failure" : "success";
+                rt_kprintf("probe %s %s \n", argv[2], result_str);
+            }
+            else
+            {
+                rt_kprintf("dac probe <dac_name>   - probe dac by name\n");
+            }
+        }
+        else
+        {
+            if (dac_device == RT_NULL)
+            {
+                rt_kprintf("Please using 'dac probe <dac_name>' first\n");
+                return -RT_ERROR;
+            }
+            if (!strcmp(argv[1], "enable"))
+            {
+                if (argc == 3)
+                {
+                    result = rt_dac_enable(dac_device, atoi(argv[2]));
+                    result_str = (result == RT_EOK) ? "success" : "failure";
+                    rt_kprintf("%s channel %d enables %s \n", dac_device->parent.parent.name, atoi(argv[2]), result_str);
+                }
+                else
+                {
+                    rt_kprintf("dac enable <channel>   - enable dac channel\n");
+                }
+            }
+            else if (!strcmp(argv[1], "write"))
+            {
+                if (argc == 4)
+                {
+                    rt_dac_write(dac_device, atoi(argv[2]), atoi(argv[3]));
+                    rt_kprintf("%s channel %d write value is %d \n", dac_device->parent.parent.name, atoi(argv[2]), atoi(argv[3]));
+                }
+                else
+                {
+                    rt_kprintf("dac write <channel> <value>     - write dac value on the channel\n");
+                }
+            }
+            else if (!strcmp(argv[1], "disable"))
+            {
+                if (argc == 3)
+                {
+                    result = rt_dac_disabled(dac_device, atoi(argv[2]));
+                    result_str = (result == RT_EOK) ? "success" : "failure";
+                    rt_kprintf("%s channel %d disable %s \n", dac_device->parent.parent.name, atoi(argv[2]), result_str);
+                }
+                else
+                {
+                    rt_kprintf("dac disable <channel>  - disable dac channel\n");
+                }
+            }
+            else
+            {
+                rt_kprintf("Unknown command. Please enter 'dac' for help\n");
+            }
+        }
+    }
+    else
+    {
+        rt_kprintf("Usage: \n");
+        rt_kprintf("dac probe <dac_name>           - probe dac by name\n");
+        rt_kprintf("dac write <channel> <value>    - write dac value on the channel\n");
+        rt_kprintf("dac disable <channel>          - disable dac channel\n");
+        rt_kprintf("dac enable <channel>           - enable dac channel\n");
+        result = -RT_ERROR;
+    }
+    return RT_EOK;
+}
+MSH_CMD_EXPORT(dac, dac function);
+
+#endif /* FINSH_USING_MSH */
diff --git a/components/drivers/sensors/sensor.h b/components/drivers/sensors/sensor.h
index 625fd566f2..e61b32acba 100755
--- a/components/drivers/sensors/sensor.h
+++ b/components/drivers/sensors/sensor.h
@@ -63,6 +63,7 @@ extern "C" {
 #define RT_SENSOR_VENDOR_SENSIRION     (10) /* Sensirion */
 #define RT_SENSOR_VENDOR_TI            (11) /* Texas Instruments */
 #define RT_SENSOR_VENDOR_PLANTOWER     (12) /* Plantower */
+#define RT_SENSOR_VENDOR_AMS           (13) /* ams AG */
 
 
 /* Sensor unit types */
@@ -81,6 +82,8 @@ extern "C" {
 #define  RT_SENSOR_UNIT_BPM            (11) /* Heart rate              unit: bpm        */
 #define  RT_SENSOR_UNIT_MM             (12) /* Distance                unit: mm         */
 #define  RT_SENSOR_UNIT_MN             (13) /* Force                   unit: mN         */
+#define  RT_SENSOR_UNIT_PPM            (14) /* Concentration           unit: ppm        */
+#define  RT_SENSOR_UNIT_PPB            (15) /* Concentration           unit: ppb        */
 
 /* Sensor communication interface types */
 
diff --git a/components/drivers/sensors/sensor_cmd.c b/components/drivers/sensors/sensor_cmd.c
index 5f1f31c9e5..d74b1a6307 100755
--- a/components/drivers/sensors/sensor_cmd.c
+++ b/components/drivers/sensors/sensor_cmd.c
@@ -226,6 +226,7 @@ static void sensor_polling(int argc, char **argv)
     rt_sensor_t sensor;
     struct rt_sensor_data data;
     rt_size_t res, i;
+    rt_int32_t delay;
 
     dev = rt_device_find(argv[1]);
     if (dev == RT_NULL)
@@ -237,6 +238,7 @@ static void sensor_polling(int argc, char **argv)
         num = atoi(argv[2]);
 
     sensor = (rt_sensor_t)dev;
+    delay  = sensor->info.period_min > 100 ? sensor->info.period_min : 100;
 
     if (rt_device_open(dev, RT_DEVICE_FLAG_RDWR) != RT_EOK)
     {
@@ -256,7 +258,7 @@ static void sensor_polling(int argc, char **argv)
         {
             sensor_show_data(i, sensor, &data);
         }
-        rt_thread_mdelay(100);
+        rt_thread_mdelay(delay);
     }
     rt_device_close(dev);
 }
@@ -268,7 +270,9 @@ static void sensor(int argc, char **argv)
 {
     static rt_device_t dev = RT_NULL;
     struct rt_sensor_data data;
+    rt_sensor_t sensor;
     rt_size_t res, i;
+    rt_int32_t delay;
 
     /* If the number of arguments less than 2 */
     if (argc < 2)
@@ -335,6 +339,9 @@ static void sensor(int argc, char **argv)
             case RT_SENSOR_VENDOR_PLANTOWER:
                 rt_kprintf("vendor    :Plantower\n");
                 break;
+            case RT_SENSOR_VENDOR_AMS:
+                rt_kprintf("vendor    :AMS\n");
+                break;
         }
         rt_kprintf("model     :%s\n", info.model);
         switch (info.unit)
@@ -381,6 +388,12 @@ static void sensor(int argc, char **argv)
             case RT_SENSOR_UNIT_MN:
                 rt_kprintf("unit      :mN\n");
                 break;
+            case RT_SENSOR_UNIT_PPM:
+                rt_kprintf("unit      :ppm\n");
+                break;
+            case RT_SENSOR_UNIT_PPB:
+                rt_kprintf("unit      :ppb\n");
+                break;
         }
         rt_kprintf("range_max :%d\n", info.range_max);
         rt_kprintf("range_min :%d\n", info.range_min);
@@ -401,6 +414,9 @@ static void sensor(int argc, char **argv)
             num = atoi(argv[2]);
         }
 
+        sensor = (rt_sensor_t)dev;
+        delay  = sensor->info.period_min > 100 ? sensor->info.period_min : 100;
+
         for (i = 0; i < num; i++)
         {
             res = rt_device_read(dev, 0, &data, 1);
@@ -410,9 +426,9 @@ static void sensor(int argc, char **argv)
             }
             else
             {
-                sensor_show_data(i, (rt_sensor_t)dev, &data);
+                sensor_show_data(i, sensor, &data);
             }
-            rt_thread_mdelay(100);
+            rt_thread_mdelay(delay);
         }
     }
     else if (argc == 3)
diff --git a/components/drivers/spi/spi_flash_sfud.c b/components/drivers/spi/spi_flash_sfud.c
index 9c0b65e55c..2333c9ccb3 100644
--- a/components/drivers/spi/spi_flash_sfud.c
+++ b/components/drivers/spi/spi_flash_sfud.c
@@ -684,11 +684,13 @@ static void sf(uint8_t argc, char **argv) {
                 addr = 0;
                 size = sfud_dev->chip.capacity;
                 uint32_t start_time, time_cast;
-                size_t write_size = SFUD_WRITE_MAX_PAGE_SIZE, read_size = SFUD_WRITE_MAX_PAGE_SIZE;
+                size_t write_size = SFUD_WRITE_MAX_PAGE_SIZE, read_size = SFUD_WRITE_MAX_PAGE_SIZE, cur_op_size;
                 uint8_t *write_data = rt_malloc(write_size), *read_data = rt_malloc(read_size);
 
                 if (write_data && read_data) {
-                    rt_memset(write_data, 0x55, write_size);
+                    for (i = 0; i < write_size; i ++) {
+                        write_data[i] = i & 0xFF;
+                    }
                     /* benchmark testing */
                     rt_kprintf("Erasing the %s %ld bytes data, waiting...\n", sfud_dev->name, size);
                     start_time = rt_tick_get();
@@ -704,7 +706,12 @@ static void sf(uint8_t argc, char **argv) {
                     rt_kprintf("Writing the %s %ld bytes data, waiting...\n", sfud_dev->name, size);
                     start_time = rt_tick_get();
                     for (i = 0; i < size; i += write_size) {
-                        result = sfud_write(sfud_dev, addr + i, write_size, write_data);
+                        if (i + write_size <= size) {
+                            cur_op_size = write_size;
+                        } else {
+                            cur_op_size = size - i;
+                        }
+                        result = sfud_write(sfud_dev, addr + i, cur_op_size, write_data);
                         if (result != SFUD_SUCCESS) {
                             rt_kprintf("Writing %s failed, already wr for %lu bytes, write %d each time\n", sfud_dev->name, i, write_size);
                             break;
@@ -722,12 +729,13 @@ static void sf(uint8_t argc, char **argv) {
                     start_time = rt_tick_get();
                     for (i = 0; i < size; i += read_size) {
                         if (i + read_size <= size) {
-                            result = sfud_read(sfud_dev, addr + i, read_size, read_data);
+                            cur_op_size = read_size;
                         } else {
-                            result = sfud_read(sfud_dev, addr + i, size - i, read_data);
+                            cur_op_size = size - i;
                         }
+                        result = sfud_read(sfud_dev, addr + i, cur_op_size, read_data);
                         /* data check */
-                        if (memcmp(write_data, read_data, read_size))
+                        if (memcmp(write_data, read_data, cur_op_size))
                         {
                             rt_kprintf("Data check ERROR! Please check you flash by other command.\n");
                             result = SFUD_ERR_READ;
diff --git a/components/drivers/wlan/wlan_mgnt.c b/components/drivers/wlan/wlan_mgnt.c
index cf2204c6b3..fefe700acc 100644
--- a/components/drivers/wlan/wlan_mgnt.c
+++ b/components/drivers/wlan/wlan_mgnt.c
@@ -713,7 +713,7 @@ static void rt_wlan_event_dispatch(struct rt_wlan_device *device, rt_wlan_dev_ev
     }
     COMPLETE_UNLOCK();
 #ifdef RT_WLAN_WORK_THREAD_ENABLE
-    rt_wlan_send_to_thread(user_event, RT_NULL, 0);
+    rt_wlan_send_to_thread(user_event, user_buff.data, user_buff.len);
 #else
     {
         void *user_parameter;
diff --git a/components/finsh/shell.c b/components/finsh/shell.c
index 852d3e7ac7..61f0b9562e 100644
--- a/components/finsh/shell.c
+++ b/components/finsh/shell.c
@@ -101,7 +101,7 @@ int finsh_set_prompt(const char * prompt)
 #include <dfs_posix.h>
 #endif /* RT_USING_DFS */
 
-const char *finsh_get_prompt()
+const char *finsh_get_prompt(void)
 {
 #define _MSH_PROMPT "msh "
 #define _PROMPT     "finsh "
diff --git a/components/net/Kconfig b/components/net/Kconfig
index 4436934f09..45bc8d101c 100644
--- a/components/net/Kconfig
+++ b/components/net/Kconfig
@@ -118,16 +118,17 @@ config RT_USING_LWIP
             config RT_USING_LWIP202
                 bool "lwIP v2.0.2"
 
-            config RT_USING_LWIP210
-                bool "lwIP v2.1.0"
+	    config RT_USING_LWIP212
+                bool "lwIP v2.1.2"
+
         endchoice
 
-        if (RT_USING_LWIP210 || RT_USING_LWIP202)
+        if (RT_USING_LWIP202 || RT_USING_LWIP212)
             config RT_USING_LWIP_IPV6
                 bool "IPV6 protocol"
                 default n
                 select NETDEV_USING_IPV6
-                select NETDEV_IPV6_SCOPES if RT_USING_LWIP210
+                select NETDEV_IPV6_SCOPES if RT_USING_LWIP212
         endif
 
         config RT_LWIP_IGMP
@@ -298,6 +299,10 @@ config RT_USING_LWIP
             int "Enable SO_RCVBUF processing"
             default 1
 
+        config LWIP_SO_LINGER
+            int "Enable SO_LINGER processing"
+            default 0
+
         config RT_LWIP_NETIF_LOOPBACK
             bool "Enable netif loopback"
             default n
diff --git a/components/net/SConscript b/components/net/SConscript
index 0c59cd1c3c..2012e6fbfe 100644
--- a/components/net/SConscript
+++ b/components/net/SConscript
@@ -8,7 +8,7 @@ cwd = GetCurrentDir()
 list = os.listdir(cwd)
 
 # the default version of LWIP is 2.0.2
-if not GetDepend('RT_USING_LWIP141') and not GetDepend('RT_USING_LWIP202') and not GetDepend('RT_USING_LWIP210'):
+if not GetDepend('RT_USING_LWIP141') and not GetDepend('RT_USING_LWIP202') and not GetDepend('RT_USING_LWIP212'):
     AddDepend('RT_USING_LWIP202')
 
 for d in list:
diff --git a/components/net/at/Kconfig b/components/net/at/Kconfig
index 92818331af..4aedbb888b 100644
--- a/components/net/at/Kconfig
+++ b/components/net/at/Kconfig
@@ -82,7 +82,7 @@ if RT_USING_AT
 
     config AT_SW_VERSION_NUM
         hex
-        default 0x10300
+        default 0x10301
         help
             software module version number
 
diff --git a/components/net/at/at_socket/at_socket.c b/components/net/at/at_socket/at_socket.c
index ca57677daf..666b0f509e 100644
--- a/components/net/at/at_socket/at_socket.c
+++ b/components/net/at/at_socket/at_socket.c
@@ -302,7 +302,7 @@ static int alloc_empty_socket(rt_slist_t *l)
     return idx;
 }
 
-static struct at_socket *alloc_socket_by_device(struct at_device *device)
+static struct at_socket *alloc_socket_by_device(struct at_device *device, enum at_socket_type type)
 {
     static rt_mutex_t at_slock = RT_NULL;
     struct at_socket *sock = RT_NULL;
@@ -323,14 +323,21 @@ static struct at_socket *alloc_socket_by_device(struct at_device *device)
     rt_mutex_take(at_slock, RT_WAITING_FOREVER);
 
     /* find an empty at socket entry */
-    for (idx = 0; idx < device->class->socket_num && device->sockets[idx].magic; idx++);
+    if (device->class->socket_ops->at_socket != RT_NULL)
+    {
+        idx = device->class->socket_ops->at_socket(device, type);
+    }
+    else
+    {
+        for (idx = 0; idx < device->class->socket_num && device->sockets[idx].magic; idx++);
+    }
 
     /* can't find an empty protocol family entry */
-    if (idx == device->class->socket_num)
+    if (idx < 0 || idx >= device->class->socket_num)
     {
         goto __err;
     }
-
+    
     sock = &(device->sockets[idx]);
     /* the socket descriptor is the number of sockte lists */
     sock->socket = alloc_empty_socket(&(sock->list));
@@ -374,7 +381,7 @@ __err:
     return RT_NULL;
 }
 
-static struct at_socket *alloc_socket(void)
+static struct at_socket *alloc_socket(enum at_socket_type type)
 {
     extern struct netdev *netdev_default;
     struct netdev *netdev = RT_NULL;
@@ -401,7 +408,7 @@ static struct at_socket *alloc_socket(void)
         return RT_NULL;
     }
 
-    return alloc_socket_by_device(device);
+    return alloc_socket_by_device(device, type);
 }
 
 static void at_recv_notice_cb(struct at_socket *sock, at_socket_evt_t event, const char *buff, size_t bfsz);
@@ -433,7 +440,7 @@ int at_socket(int domain, int type, int protocol)
     }
 
     /* allocate and initialize a new AT socket */
-    sock = alloc_socket();
+    sock = alloc_socket(socket_type);
     if (sock == RT_NULL)
     {
         return -1;
@@ -615,7 +622,7 @@ int at_bind(int socket, const struct sockaddr *name, socklen_t namelen)
         }
 
         /* allocate new socket */
-        new_sock = alloc_socket_by_device(new_device);
+        new_sock = alloc_socket_by_device(new_device, type);
         if (new_sock == RT_NULL)
         {
             return -1;
diff --git a/components/net/at/at_socket/at_socket.h b/components/net/at/at_socket/at_socket.h
index d98fa05f24..3317579f05 100644
--- a/components/net/at/at_socket/at_socket.h
+++ b/components/net/at/at_socket/at_socket.h
@@ -56,6 +56,7 @@ typedef enum
 } at_socket_evt_t;
 
 struct at_socket;
+struct at_device;
 
 typedef void (*at_evt_cb_t)(struct at_socket *socket, at_socket_evt_t event, const char *buff, size_t bfsz);
 
@@ -70,6 +71,7 @@ struct at_socket_ops
     int (*at_send)(struct at_socket *socket, const char *buff, size_t bfsz, enum at_socket_type type);
     int (*at_domain_resolve)(const char *name, char ip[16]);
     void (*at_set_event_cb)(at_socket_evt_t event, at_evt_cb_t cb);
+    int (*at_socket)(struct at_device *device, enum at_socket_type type);
 };
 
 /* AT receive package list structure */
diff --git a/components/net/at/include/at.h b/components/net/at/include/at.h
index a7a6aeca7a..2d0e270f6a 100644
--- a/components/net/at/include/at.h
+++ b/components/net/at/include/at.h
@@ -18,7 +18,7 @@
 extern "C" {
 #endif
 
-#define AT_SW_VERSION                  "1.3.0"
+#define AT_SW_VERSION                  "1.3.1"
 
 #define AT_CMD_NAME_LEN                16
 #define AT_END_MARK_LEN                4
diff --git a/components/net/lwip-1.4.1/src/arch/include/arch/cc.h b/components/net/lwip-1.4.1/src/arch/include/arch/cc.h
index 06c0be6670..5304091755 100644
--- a/components/net/lwip-1.4.1/src/arch/include/arch/cc.h
+++ b/components/net/lwip-1.4.1/src/arch/include/arch/cc.h
@@ -66,7 +66,7 @@ typedef uintptr_t mem_ptr_t;
 #endif /* __CC_ARM/__IAR_SYSTEMS_ICC__ */
 #endif
 
-#if defined(RT_USING_LIBC) || defined(RT_USING_MINILIBC)
+#if defined(RT_USING_LIBC) || defined(RT_USING_MINILIBC) || defined(RT_LIBC_USING_TIME)
 #include <sys/time.h>
 #define LWIP_TIMEVAL_PRIVATE	   0
 #else
diff --git a/components/net/lwip-2.0.2/src/arch/include/arch/cc.h b/components/net/lwip-2.0.2/src/arch/include/arch/cc.h
index 9663935da6..491cab6b5f 100644
--- a/components/net/lwip-2.0.2/src/arch/include/arch/cc.h
+++ b/components/net/lwip-2.0.2/src/arch/include/arch/cc.h
@@ -45,7 +45,7 @@
 #define S32_F "ld"
 #define X32_F "lx"
 
-#if defined(RT_USING_LIBC) || defined(RT_USING_MINILIBC)
+#if defined(RT_USING_LIBC) || defined(RT_USING_MINILIBC) || defined(RT_LIBC_USING_TIME)
 #include <sys/time.h>
 #define LWIP_TIMEVAL_PRIVATE	   0
 #else
diff --git a/components/net/lwip-2.1.0/READTEST.md b/components/net/lwip-2.1.0/READTEST.md
deleted file mode 100644
index 6bdebeb112..0000000000
--- a/components/net/lwip-2.1.0/READTEST.md
+++ /dev/null
@@ -1,12 +0,0 @@
-Porting network interface device for RT-Thread in lwIP.
-The major jobs following RT-Thread Team. The RT-Thread network interface device need to synchronize some network status and address information in lwIP, so it need to make some changes in the lwIP netwrok status and address operations function.
-The specific changes are as follows:
-
- - netif.c: add RT-Thread netdev header file , status synchronize(UP, LINK_UP), address synchronize(IP, netmask, gateway);
-
- - dns.c: add RT-Thread header file, dns servers synchronize;
-
- - sockets.c: custom 'select' function implementation in RT-Thread by the wait queue mode.
-
-by ChenYong 2019/3/26 10:00 AM
[email protected]
diff --git a/components/net/lwip-2.1.0/doc/FILES b/components/net/lwip-2.1.0/doc/FILES
deleted file mode 100644
index e588575085..0000000000
--- a/components/net/lwip-2.1.0/doc/FILES
+++ /dev/null
@@ -1,9 +0,0 @@
-doxygen/       - Configuration files and scripts to create the lwIP doxygen source
-                 documentation (found at http://www.nongnu.org/lwip/)
-
-savannah.txt   - How to obtain the current development source code.
-contrib.txt    - How to contribute to lwIP as a developer.
-rawapi.txt     - The documentation for the core API of lwIP.
-                 Also provides an overview about the other APIs and multithreading.
-sys_arch.txt   - The documentation for a system abstraction layer of lwIP.
-ppp.txt        - Documentation of the PPP interface for lwIP.
diff --git a/components/net/lwip-2.1.0/doc/NO_SYS_SampleCode.c b/components/net/lwip-2.1.0/doc/NO_SYS_SampleCode.c
deleted file mode 100644
index 71f1c9f7f2..0000000000
--- a/components/net/lwip-2.1.0/doc/NO_SYS_SampleCode.c
+++ /dev/null
@@ -1,122 +0,0 @@
-void
-eth_mac_irq()
-{
-  /* Service MAC IRQ here */
-
-  /* Allocate pbuf from pool (avoid using heap in interrupts) */
-  struct pbuf* p = pbuf_alloc(PBUF_RAW, eth_data_count, PBUF_POOL);
-
-  if(p != NULL) {
-    /* Copy ethernet frame into pbuf */
-    pbuf_take(p, eth_data, eth_data_count);
-
-    /* Put in a queue which is processed in main loop */
-    if(!queue_try_put(&queue, p)) {
-      /* queue is full -> packet loss */
-      pbuf_free(p);
-    }
-  }
-}
-
-static err_t 
-netif_output(struct netif *netif, struct pbuf *p)
-{
-  LINK_STATS_INC(link.xmit);
-
-  /* Update SNMP stats (only if you use SNMP) */
-  MIB2_STATS_NETIF_ADD(netif, ifoutoctets, p->tot_len);
-  int unicast = ((p->payload[0] & 0x01) == 0);
-  if (unicast) {
-    MIB2_STATS_NETIF_INC(netif, ifoutucastpkts);
-  } else {
-    MIB2_STATS_NETIF_INC(netif, ifoutnucastpkts);
-  }
-
-  lock_interrupts();
-  pbuf_copy_partial(p, mac_send_buffer, p->tot_len, 0);
-  /* Start MAC transmit here */
-  unlock_interrupts();
-
-  return ERR_OK;
-}
-
-static void 
-netif_status_callback(struct netif *netif)
-{
-  printf("netif status changed %s\n", ip4addr_ntoa(netif_ip4_addr(netif)));
-}
-
-static err_t 
-netif_init(struct netif *netif)
-{
-  netif->linkoutput = netif_output;
-  netif->output     = etharp_output;
-  netif->output_ip6 = ethip6_output;
-  netif->mtu        = ETHERNET_MTU;
-  netif->flags      = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET | NETIF_FLAG_IGMP | NETIF_FLAG_MLD6;
-  MIB2_INIT_NETIF(netif, snmp_ifType_ethernet_csmacd, 100000000);
-
-  SMEMCPY(netif->hwaddr, your_mac_address_goes_here, ETH_HWADDR_LEN);
-  netif->hwaddr_len = ETH_HWADDR_LEN;
-
-  return ERR_OK;
-}
-
-void 
-main(void)
-{
-  struct netif netif;
-
-  lwip_init();
-
-  netif_add(&netif, IP4_ADDR_ANY, IP4_ADDR_ANY, IP4_ADDR_ANY, NULL, netif_init, netif_input);
-  netif.name[0] = 'e';
-  netif.name[1] = '0';
-  netif_create_ip6_linklocal_address(&netif, 1);
-  netif.ip6_autoconfig_enabled = 1;
-  netif_set_status_callback(&netif, netif_status_callback);
-  netif_set_default(&netif);
-  netif_set_up(&netif);
-  
-  /* Start DHCP and HTTPD */
-  dhcp_start(&netif );
-  httpd_init();
-
-  while(1) {
-    /* Check link state, e.g. via MDIO communication with PHY */
-    if(link_state_changed()) {
-      if(link_is_up()) {
-        netif_set_link_up(&netif);
-      } else {
-        netif_set_link_down(&netif);
-      }
-    }
-
-    /* Check for received frames, feed them to lwIP */
-    lock_interrupts();
-    struct pbuf* p = queue_try_get(&queue);
-    unlock_interrupts();
-
-    if(p != NULL) {
-      LINK_STATS_INC(link.recv);
- 
-      /* Update SNMP stats (only if you use SNMP) */
-      MIB2_STATS_NETIF_ADD(netif, ifinoctets, p->tot_len);
-      int unicast = ((p->payload[0] & 0x01) == 0);
-      if (unicast) {
-        MIB2_STATS_NETIF_INC(netif, ifinucastpkts);
-      } else {
-        MIB2_STATS_NETIF_INC(netif, ifinnucastpkts);
-      }
-
-      if(netif.input(p, &netif) != ERR_OK) {
-        pbuf_free(p);
-      }
-    }
-     
-    /* Cyclic lwIP timers check */
-    sys_check_timeouts();
-     
-    /* your application goes here */
-  }
-}
diff --git a/components/net/lwip-2.1.0/doc/ZeroCopyRx.c b/components/net/lwip-2.1.0/doc/ZeroCopyRx.c
deleted file mode 100644
index 0e8219bd28..0000000000
--- a/components/net/lwip-2.1.0/doc/ZeroCopyRx.c
+++ /dev/null
@@ -1,45 +0,0 @@
-typedef struct my_custom_pbuf
-{
-   struct pbuf_custom p;
-   void* dma_descriptor;
-} my_custom_pbuf_t;
-
-LWIP_MEMPOOL_DECLARE(RX_POOL, 10, sizeof(my_custom_pbuf_t), "Zero-copy RX PBUF pool");
-
-void my_pbuf_free_custom(void* p)
-{
-  SYS_ARCH_DECL_PROTECT(old_level);
-
-  my_custom_pbuf_t* my_puf = (my_custom_pbuf_t*)p;
-
-  // invalidate data cache here - lwIP and/or application may have written into buffer!
-  // (invalidate is faster than flushing, and noone needs the correct data in the buffer)
-  invalidate_cpu_cache(p->payload, p->tot_len);
-
-  SYS_ARCH_PROTECT(old_level);
-  free_rx_dma_descriptor(my_pbuf->dma_descriptor);
-  LWIP_MEMPOOL_FREE(RX_POOL, my_pbuf);
-  SYS_ARCH_UNPROTECT(old_level);
-}
-
-void eth_rx_irq()
-{
-  dma_descriptor*   dma_desc = get_RX_DMA_descriptor_from_ethernet();
-  my_custom_pbuf_t* my_pbuf  = (my_custom_pbuf_t*)LWIP_MEMPOOL_ALLOC(RX_POOL);
-
-  my_pbuf->p.custom_free_function = my_pbuf_free_custom;
-  my_pbuf->dma_descriptor         = dma_desc;
-
-  invalidate_cpu_cache(dma_desc->rx_data, dma_desc->rx_length);
-  
-  struct pbuf* p = pbuf_alloced_custom(PBUF_RAW,
-     dma_desc->rx_length,
-     PBUF_REF,
-     &my_pbuf->p,
-     dma_desc->rx_data,
-     dma_desc->max_buffer_size);
-
-  if(netif->input(p, netif) != ERR_OK) {
-    pbuf_free(p);
-  }
-}
diff --git a/components/net/lwip-2.1.0/doc/contrib.txt b/components/net/lwip-2.1.0/doc/contrib.txt
deleted file mode 100644
index 6f0d7bc516..0000000000
--- a/components/net/lwip-2.1.0/doc/contrib.txt
+++ /dev/null
@@ -1,58 +0,0 @@
-1 Introduction
-
-This document describes some guidelines for people participating
-in lwIP development.
-
-2 How to contribute to lwIP
-
-Here is a short list of suggestions to anybody working with lwIP and 
-trying to contribute bug reports, fixes, enhancements, platform ports etc.
-First of all as you may already know lwIP is a volunteer project so feedback
-to fixes or questions might often come late. Hopefully the bug and patch tracking 
-features of Savannah help us not lose users' input.
-
-2.1 Source code style:
-
-1. do not use tabs.
-2. indentation is two spaces per level (i.e. per tab).
-3. end debug messages with a trailing newline (\n).
-4. one space between keyword and opening bracket.
-5. no space between function and opening bracket.
-6. one space and no newline before opening curly braces of a block.
-7. closing curly brace on a single line.
-8. spaces surrounding assignment and comparisons.
-9. don't initialize static and/or global variables to zero, the compiler takes care of that.
-10. use current source code style as further reference.
-
-2.2 Source code documentation style:
-
-1. JavaDoc compliant and Doxygen compatible.
-2. Function documentation above functions in .c files, not .h files.
-   (This forces you to synchronize documentation and implementation.)
-3. Use current documentation style as further reference.
- 
-2.3 Bug reports and patches:
-
-1. Make sure you are reporting bugs or send patches against the latest
-   sources. (From the latest release and/or the current Git sources.)
-2. If you think you found a bug make sure it's not already filed in the
-   bugtracker at Savannah.
-3. If you have a fix put the patch on Savannah. If it is a patch that affects
-   both core and arch specific stuff please separate them so that the core can
-   be applied separately while leaving the other patch 'open'. The preferred way
-   is to NOT touch archs you can't test and let maintainers take care of them.
-   This is a good way to see if they are used at all - the same goes for unix
-   netifs except tapif.
-4. Do not file a bug and post a fix to it to the patch area. Either a bug report
-   or a patch will be enough.
-   If you correct an existing bug then attach the patch to the bug rather than creating a new entry in the patch area.
-5. Patches should be specific to a single change or to related changes. Do not mix bugfixes with spelling and other
-   trivial fixes unless the bugfix is trivial too. Do not reorganize code and rename identifiers in the same patch you
-   change behaviour if not necessary. A patch is easier to read and understand if it's to the point and short than
-   if it's not to the point and long :) so the chances for it to be applied are greater. 
-
-2.4 Platform porters:
-
-1. If you have ported lwIP to a platform (an OS, a uC/processor or a combination of these) and
-   you think it could benefit others[1] you might want discuss this on the mailing list. You
-   can also ask for Git access to submit and maintain your port in the contrib Git module.
diff --git a/components/net/lwip-2.1.0/doc/doxygen/generate.bat b/components/net/lwip-2.1.0/doc/doxygen/generate.bat
deleted file mode 100644
index 4eab18c7f4..0000000000
--- a/components/net/lwip-2.1.0/doc/doxygen/generate.bat
+++ /dev/null
@@ -1 +0,0 @@
-doxygen lwip.Doxyfile

diff --git a/components/net/lwip-2.1.0/doc/doxygen/generate.sh b/components/net/lwip-2.1.0/doc/doxygen/generate.sh
deleted file mode 100644
index 89344b0e81..0000000000
--- a/components/net/lwip-2.1.0/doc/doxygen/generate.sh
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/bin/sh
-
-doxygen lwip.Doxyfile
diff --git a/components/net/lwip-2.1.0/doc/doxygen/lwip.Doxyfile b/components/net/lwip-2.1.0/doc/doxygen/lwip.Doxyfile
deleted file mode 100644
index 78cc0f28f7..0000000000
--- a/components/net/lwip-2.1.0/doc/doxygen/lwip.Doxyfile
+++ /dev/null
@@ -1,2531 +0,0 @@
-# Doxyfile 1.8.13
-
-# This file describes the settings to be used by the documentation system
-# doxygen (www.doxygen.org) for a project.
-#
-# All text after a double hash (##) is considered a comment and is placed in
-# front of the TAG it is preceding.
-#
-# All text after a single hash (#) is considered a comment and will be ignored.
-# The format is:
-# TAG = value [value, ...]
-# For lists, items can also be appended using:
-# TAG += value [value, ...]
-# Values that contain spaces should be placed between quotes (\" \").
-
-#---------------------------------------------------------------------------
-# Project related configuration options
-#---------------------------------------------------------------------------
-
-# This tag specifies the encoding used for all characters in the config file
-# that follow. The default is UTF-8 which is also the encoding used for all text
-# before the first occurrence of this tag. Doxygen uses libiconv (or the iconv
-# built into libc) for the transcoding. See http://www.gnu.org/software/libiconv
-# for the list of possible encodings.
-# The default value is: UTF-8.
-
-DOXYFILE_ENCODING      = UTF-8
-
-# The PROJECT_NAME tag is a single word (or a sequence of words surrounded by
-# double-quotes, unless you are using Doxywizard) that should identify the
-# project for which the documentation is generated. This name is used in the
-# title of most generated pages and in a few other places.
-# The default value is: My Project.
-
-PROJECT_NAME           = "lwIP"
-
-# The PROJECT_NUMBER tag can be used to enter a project or revision number. This
-# could be handy for archiving the generated documentation or if some version
-# control system is used.
-
-PROJECT_NUMBER         = "2.1.0"
-
-# Using the PROJECT_BRIEF tag one can provide an optional one line description
-# for a project that appears at the top of each page and should give viewer a
-# quick idea about the purpose of the project. Keep the description short.
-
-PROJECT_BRIEF          = "Lightweight IP stack"
-
-# With the PROJECT_LOGO tag one can specify a logo or an icon that is included
-# in the documentation. The maximum height of the logo should not exceed 55
-# pixels and the maximum width should not exceed 200 pixels. Doxygen will copy
-# the logo to the output directory.
-
-PROJECT_LOGO           =
-
-# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) path
-# into which the generated documentation will be written. If a relative path is
-# entered, it will be relative to the location where doxygen was started. If
-# left blank the current directory will be used.
-
-OUTPUT_DIRECTORY       = "output"
-
-# If the CREATE_SUBDIRS tag is set to YES then doxygen will create 4096 sub-
-# directories (in 2 levels) under the output directory of each output format and
-# will distribute the generated files over these directories. Enabling this
-# option can be useful when feeding doxygen a huge amount of source files, where
-# putting all generated files in the same directory would otherwise causes
-# performance problems for the file system.
-# The default value is: NO.
-
-CREATE_SUBDIRS         = NO
-
-# If the ALLOW_UNICODE_NAMES tag is set to YES, doxygen will allow non-ASCII
-# characters to appear in the names of generated files. If set to NO, non-ASCII
-# characters will be escaped, for example _xE3_x81_x84 will be used for Unicode
-# U+3044.
-# The default value is: NO.
-
-ALLOW_UNICODE_NAMES    = NO
-
-# The OUTPUT_LANGUAGE tag is used to specify the language in which all
-# documentation generated by doxygen is written. Doxygen will use this
-# information to generate all constant output in the proper language.
-# Possible values are: Afrikaans, Arabic, Armenian, Brazilian, Catalan, Chinese,
-# Chinese-Traditional, Croatian, Czech, Danish, Dutch, English (United States),
-# Esperanto, Farsi (Persian), Finnish, French, German, Greek, Hungarian,
-# Indonesian, Italian, Japanese, Japanese-en (Japanese with English messages),
-# Korean, Korean-en (Korean with English messages), Latvian, Lithuanian,
-# Macedonian, Norwegian, Persian (Farsi), Polish, Portuguese, Romanian, Russian,
-# Serbian, Serbian-Cyrillic, Slovak, Slovene, Spanish, Swedish, Turkish,
-# Ukrainian and Vietnamese.
-# The default value is: English.
-
-OUTPUT_LANGUAGE        = English
-
-# If the BRIEF_MEMBER_DESC tag is set to YES, doxygen will include brief member
-# descriptions after the members that are listed in the file and class
-# documentation (similar to Javadoc). Set to NO to disable this.
-# The default value is: YES.
-
-BRIEF_MEMBER_DESC      = YES
-
-# If the REPEAT_BRIEF tag is set to YES, doxygen will prepend the brief
-# description of a member or function before the detailed description
-#
-# Note: If both HIDE_UNDOC_MEMBERS and BRIEF_MEMBER_DESC are set to NO, the
-# brief descriptions will be completely suppressed.
-# The default value is: YES.
-
-REPEAT_BRIEF           = YES
-
-# This tag implements a quasi-intelligent brief description abbreviator that is
-# used to form the text in various listings. Each string in this list, if found
-# as the leading text of the brief description, will be stripped from the text
-# and the result, after processing the whole list, is used as the annotated
-# text. Otherwise, the brief description is used as-is. If left blank, the
-# following values are used ($name is automatically replaced with the name of
-# the entity):The $name class, The $name widget, The $name file, is, provides,
-# specifies, contains, represents, a, an and the.
-
-ABBREVIATE_BRIEF       = "The $name class       " \
-                         "The $name widget       " \
-                         "The $name file       " \
-                         is \
-                         provides \
-                         specifies \
-                         contains \
-                         represents \
-                         a \
-                         an \
-                         the
-
-# If the ALWAYS_DETAILED_SEC and REPEAT_BRIEF tags are both set to YES then
-# doxygen will generate a detailed section even if there is only a brief
-# description.
-# The default value is: NO.
-
-ALWAYS_DETAILED_SEC    = NO
-
-# If the INLINE_INHERITED_MEMB tag is set to YES, doxygen will show all
-# inherited members of a class in the documentation of that class as if those
-# members were ordinary class members. Constructors, destructors and assignment
-# operators of the base classes will not be shown.
-# The default value is: NO.
-
-INLINE_INHERITED_MEMB  = NO
-
-# If the FULL_PATH_NAMES tag is set to YES, doxygen will prepend the full path
-# before files name in the file list and in the header files. If set to NO the
-# shortest path that makes the file name unique will be used
-# The default value is: YES.
-
-FULL_PATH_NAMES        = YES
-
-# The STRIP_FROM_PATH tag can be used to strip a user-defined part of the path.
-# Stripping is only done if one of the specified strings matches the left-hand
-# part of the path. The tag can be used to show relative paths in the file list.
-# If left blank the directory from which doxygen is run is used as the path to
-# strip.
-#
-# Note that you can specify absolute paths here, but also relative paths, which
-# will be relative from the directory where doxygen is started.
-# This tag requires that the tag FULL_PATH_NAMES is set to YES.
-
-STRIP_FROM_PATH        = ../../
-
-# The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of the
-# path mentioned in the documentation of a class, which tells the reader which
-# header file to include in order to use a class. If left blank only the name of
-# the header file containing the class definition is used. Otherwise one should
-# specify the list of include paths that are normally passed to the compiler
-# using the -I flag.
-
-STRIP_FROM_INC_PATH    =
-
-# If the SHORT_NAMES tag is set to YES, doxygen will generate much shorter (but
-# less readable) file names. This can be useful is your file systems doesn't
-# support long names like on DOS, Mac, or CD-ROM.
-# The default value is: NO.
-
-SHORT_NAMES            = NO
-
-# If the JAVADOC_AUTOBRIEF tag is set to YES then doxygen will interpret the
-# first line (until the first dot) of a Javadoc-style comment as the brief
-# description. If set to NO, the Javadoc-style will behave just like regular Qt-
-# style comments (thus requiring an explicit @brief command for a brief
-# description.)
-# The default value is: NO.
-
-JAVADOC_AUTOBRIEF      = NO
-
-# If the QT_AUTOBRIEF tag is set to YES then doxygen will interpret the first
-# line (until the first dot) of a Qt-style comment as the brief description. If
-# set to NO, the Qt-style will behave just like regular Qt-style comments (thus
-# requiring an explicit \brief command for a brief description.)
-# The default value is: NO.
-
-QT_AUTOBRIEF           = NO
-
-# The MULTILINE_CPP_IS_BRIEF tag can be set to YES to make doxygen treat a
-# multi-line C++ special comment block (i.e. a block of //! or /// comments) as
-# a brief description. This used to be the default behavior. The new default is
-# to treat a multi-line C++ comment block as a detailed description. Set this
-# tag to YES if you prefer the old behavior instead.
-#
-# Note that setting this tag to YES also means that rational rose comments are
-# not recognized any more.
-# The default value is: NO.
-
-MULTILINE_CPP_IS_BRIEF = NO
-
-# If the INHERIT_DOCS tag is set to YES then an undocumented member inherits the
-# documentation from any documented member that it re-implements.
-# The default value is: YES.
-
-INHERIT_DOCS           = YES
-
-# If the SEPARATE_MEMBER_PAGES tag is set to YES then doxygen will produce a new
-# page for each member. If set to NO, the documentation of a member will be part
-# of the file/class/namespace that contains it.
-# The default value is: NO.
-
-SEPARATE_MEMBER_PAGES  = NO
-
-# The TAB_SIZE tag can be used to set the number of spaces in a tab. Doxygen
-# uses this value to replace tabs by spaces in code fragments.
-# Minimum value: 1, maximum value: 16, default value: 4.
-
-TAB_SIZE               = 8
-
-# This tag can be used to specify a number of aliases that act as commands in
-# the documentation. An alias has the form:
-# name=value
-# For example adding
-# "sideeffect=@par Side Effects:\n"
-# will allow you to put the command \sideeffect (or @sideeffect) in the
-# documentation, which will result in a user-defined paragraph with heading
-# "Side Effects:". You can put \n's in the value part of an alias to insert
-# newlines.
-
-ALIASES                =
-
-# This tag can be used to specify a number of word-keyword mappings (TCL only).
-# A mapping has the form "name=value". For example adding "class=itcl::class"
-# will allow you to use the command class in the itcl::class meaning.
-
-TCL_SUBST              =
-
-# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C sources
-# only. Doxygen will then generate output that is more tailored for C. For
-# instance, some of the names that are used will be different. The list of all
-# members will be omitted, etc.
-# The default value is: NO.
-
-OPTIMIZE_OUTPUT_FOR_C  = YES
-
-# Set the OPTIMIZE_OUTPUT_JAVA tag to YES if your project consists of Java or
-# Python sources only. Doxygen will then generate output that is more tailored
-# for that language. For instance, namespaces will be presented as packages,
-# qualified scopes will look different, etc.
-# The default value is: NO.
-
-OPTIMIZE_OUTPUT_JAVA   = NO
-
-# Set the OPTIMIZE_FOR_FORTRAN tag to YES if your project consists of Fortran
-# sources. Doxygen will then generate output that is tailored for Fortran.
-# The default value is: NO.
-
-OPTIMIZE_FOR_FORTRAN   = NO
-
-# Set the OPTIMIZE_OUTPUT_VHDL tag to YES if your project consists of VHDL
-# sources. Doxygen will then generate output that is tailored for VHDL.
-# The default value is: NO.
-
-OPTIMIZE_OUTPUT_VHDL   = NO
-
-# Doxygen selects the parser to use depending on the extension of the files it
-# parses. With this tag you can assign which parser to use for a given
-# extension. Doxygen has a built-in mapping, but you can override or extend it
-# using this tag. The format is ext=language, where ext is a file extension, and
-# language is one of the parsers supported by doxygen: IDL, Java, Javascript,
-# C#, C, C++, D, PHP, Objective-C, Python, Fortran (fixed format Fortran:
-# FortranFixed, free formatted Fortran: FortranFree, unknown formatted Fortran:
-# Fortran. In the later case the parser tries to guess whether the code is fixed
-# or free formatted code, this is the default for Fortran type files), VHDL. For
-# instance to make doxygen treat .inc files as Fortran files (default is PHP),
-# and .f files as C (default is Fortran), use: inc=Fortran f=C.
-#
-# Note: For files without extension you can use no_extension as a placeholder.
-#
-# Note that for custom extensions you also need to set FILE_PATTERNS otherwise
-# the files are not read by doxygen.
-
-EXTENSION_MAPPING      =
-
-# If the MARKDOWN_SUPPORT tag is enabled then doxygen pre-processes all comments
-# according to the Markdown format, which allows for more readable
-# documentation. See http://daringfireball.net/projects/markdown/ for details.
-# The output of markdown processing is further processed by doxygen, so you can
-# mix doxygen, HTML, and XML commands with Markdown formatting. Disable only in
-# case of backward compatibilities issues.
-# The default value is: YES.
-
-MARKDOWN_SUPPORT       = YES
-
-# When the TOC_INCLUDE_HEADINGS tag is set to a non-zero value, all headings up
-# to that level are automatically included in the table of contents, even if
-# they do not have an id attribute.
-# Note: This feature currently applies only to Markdown headings.
-# Minimum value: 0, maximum value: 99, default value: 0.
-# This tag requires that the tag MARKDOWN_SUPPORT is set to YES.
-
-TOC_INCLUDE_HEADINGS   = 0
-
-# When enabled doxygen tries to link words that correspond to documented
-# classes, or namespaces to their corresponding documentation. Such a link can
-# be prevented in individual cases by putting a % sign in front of the word or
-# globally by setting AUTOLINK_SUPPORT to NO.
-# The default value is: YES.
-
-AUTOLINK_SUPPORT       = YES
-
-# If you use STL classes (i.e. std::string, std::vector, etc.) but do not want
-# to include (a tag file for) the STL sources as input, then you should set this
-# tag to YES in order to let doxygen match functions declarations and
-# definitions whose arguments contain STL classes (e.g. func(std::string);
-# versus func(std::string) {}). This also make the inheritance and collaboration
-# diagrams that involve STL classes more complete and accurate.
-# The default value is: NO.
-
-BUILTIN_STL_SUPPORT    = NO
-
-# If you use Microsoft's C++/CLI language, you should set this option to YES to
-# enable parsing support.
-# The default value is: NO.
-
-CPP_CLI_SUPPORT        = NO
-
-# Set the SIP_SUPPORT tag to YES if your project consists of sip (see:
-# http://www.riverbankcomputing.co.uk/software/sip/intro) sources only. Doxygen
-# will parse them like normal C++ but will assume all classes use public instead
-# of private inheritance when no explicit protection keyword is present.
-# The default value is: NO.
-
-SIP_SUPPORT            = NO
-
-# For Microsoft's IDL there are propget and propput attributes to indicate
-# getter and setter methods for a property. Setting this option to YES will make
-# doxygen to replace the get and set methods by a property in the documentation.
-# This will only work if the methods are indeed getting or setting a simple
-# type. If this is not the case, or you want to show the methods anyway, you
-# should set this option to NO.
-# The default value is: YES.
-
-IDL_PROPERTY_SUPPORT   = YES
-
-# If member grouping is used in the documentation and the DISTRIBUTE_GROUP_DOC
-# tag is set to YES then doxygen will reuse the documentation of the first
-# member in the group (if any) for the other members of the group. By default
-# all members of a group must be documented explicitly.
-# The default value is: NO.
-
-DISTRIBUTE_GROUP_DOC   = NO
-
-# If one adds a struct or class to a group and this option is enabled, then also
-# any nested class or struct is added to the same group. By default this option
-# is disabled and one has to add nested compounds explicitly via \ingroup.
-# The default value is: NO.
-
-GROUP_NESTED_COMPOUNDS = NO
-
-# Set the SUBGROUPING tag to YES to allow class member groups of the same type
-# (for instance a group of public functions) to be put as a subgroup of that
-# type (e.g. under the Public Functions section). Set it to NO to prevent
-# subgrouping. Alternatively, this can be done per class using the
-# \nosubgrouping command.
-# The default value is: YES.
-
-SUBGROUPING            = YES
-
-# When the INLINE_GROUPED_CLASSES tag is set to YES, classes, structs and unions
-# are shown inside the group in which they are included (e.g. using \ingroup)
-# instead of on a separate page (for HTML and Man pages) or section (for LaTeX
-# and RTF).
-#
-# Note that this feature does not work in combination with
-# SEPARATE_MEMBER_PAGES.
-# The default value is: NO.
-
-INLINE_GROUPED_CLASSES = NO
-
-# When the INLINE_SIMPLE_STRUCTS tag is set to YES, structs, classes, and unions
-# with only public data fields or simple typedef fields will be shown inline in
-# the documentation of the scope in which they are defined (i.e. file,
-# namespace, or group documentation), provided this scope is documented. If set
-# to NO, structs, classes, and unions are shown on a separate page (for HTML and
-# Man pages) or section (for LaTeX and RTF).
-# The default value is: NO.
-
-INLINE_SIMPLE_STRUCTS  = NO
-
-# When TYPEDEF_HIDES_STRUCT tag is enabled, a typedef of a struct, union, or
-# enum is documented as struct, union, or enum with the name of the typedef. So
-# typedef struct TypeS {} TypeT, will appear in the documentation as a struct
-# with name TypeT. When disabled the typedef will appear as a member of a file,
-# namespace, or class. And the struct will be named TypeS. This can typically be
-# useful for C code in case the coding convention dictates that all compound
-# types are typedef'ed and only the typedef is referenced, never the tag name.
-# The default value is: NO.
-
-TYPEDEF_HIDES_STRUCT   = NO
-
-# The size of the symbol lookup cache can be set using LOOKUP_CACHE_SIZE. This
-# cache is used to resolve symbols given their name and scope. Since this can be
-# an expensive process and often the same symbol appears multiple times in the
-# code, doxygen keeps a cache of pre-resolved symbols. If the cache is too small
-# doxygen will become slower. If the cache is too large, memory is wasted. The
-# cache size is given by this formula: 2^(16+LOOKUP_CACHE_SIZE). The valid range
-# is 0..9, the default is 0, corresponding to a cache size of 2^16=65536
-# symbols. At the end of a run doxygen will report the cache usage and suggest
-# the optimal cache size from a speed point of view.
-# Minimum value: 0, maximum value: 9, default value: 0.
-
-LOOKUP_CACHE_SIZE      = 0
-
-#---------------------------------------------------------------------------
-# Build related configuration options
-#---------------------------------------------------------------------------
-
-# If the EXTRACT_ALL tag is set to YES, doxygen will assume all entities in
-# documentation are documented, even if no documentation was available. Private
-# class members and static file members will be hidden unless the
-# EXTRACT_PRIVATE respectively EXTRACT_STATIC tags are set to YES.
-# Note: This will also disable the warnings about undocumented members that are
-# normally produced when WARNINGS is set to YES.
-# The default value is: NO.
-
-EXTRACT_ALL            = NO
-
-# If the EXTRACT_PRIVATE tag is set to YES, all private members of a class will
-# be included in the documentation.
-# The default value is: NO.
-
-EXTRACT_PRIVATE        = NO
-
-# If the EXTRACT_PACKAGE tag is set to YES, all members with package or internal
-# scope will be included in the documentation.
-# The default value is: NO.
-
-EXTRACT_PACKAGE        = NO
-
-# If the EXTRACT_STATIC tag is set to YES, all static members of a file will be
-# included in the documentation.
-# The default value is: NO.
-
-EXTRACT_STATIC         = NO
-
-# If the EXTRACT_LOCAL_CLASSES tag is set to YES, classes (and structs) defined
-# locally in source files will be included in the documentation. If set to NO,
-# only classes defined in header files are included. Does not have any effect
-# for Java sources.
-# The default value is: YES.
-
-EXTRACT_LOCAL_CLASSES  = YES
-
-# This flag is only useful for Objective-C code. If set to YES, local methods,
-# which are defined in the implementation section but not in the interface are
-# included in the documentation. If set to NO, only methods in the interface are
-# included.
-# The default value is: NO.
-
-EXTRACT_LOCAL_METHODS  = NO
-
-# If this flag is set to YES, the members of anonymous namespaces will be
-# extracted and appear in the documentation as a namespace called
-# 'anonymous_namespace{file}', where file will be replaced with the base name of
-# the file that contains the anonymous namespace. By default anonymous namespace
-# are hidden.
-# The default value is: NO.
-
-EXTRACT_ANON_NSPACES   = NO
-
-# If the HIDE_UNDOC_MEMBERS tag is set to YES, doxygen will hide all
-# undocumented members inside documented classes or files. If set to NO these
-# members will be included in the various overviews, but no documentation
-# section is generated. This option has no effect if EXTRACT_ALL is enabled.
-# The default value is: NO.
-
-HIDE_UNDOC_MEMBERS     = YES
-
-# If the HIDE_UNDOC_CLASSES tag is set to YES, doxygen will hide all
-# undocumented classes that are normally visible in the class hierarchy. If set
-# to NO, these classes will be included in the various overviews. This option
-# has no effect if EXTRACT_ALL is enabled.
-# The default value is: NO.
-
-HIDE_UNDOC_CLASSES     = YES
-
-# If the HIDE_FRIEND_COMPOUNDS tag is set to YES, doxygen will hide all friend
-# (class|struct|union) declarations. If set to NO, these declarations will be
-# included in the documentation.
-# The default value is: NO.
-
-HIDE_FRIEND_COMPOUNDS  = NO
-
-# If the HIDE_IN_BODY_DOCS tag is set to YES, doxygen will hide any
-# documentation blocks found inside the body of a function. If set to NO, these
-# blocks will be appended to the function's detailed documentation block.
-# The default value is: NO.
-
-HIDE_IN_BODY_DOCS      = NO
-
-# The INTERNAL_DOCS tag determines if documentation that is typed after a
-# \internal command is included. If the tag is set to NO then the documentation
-# will be excluded. Set it to YES to include the internal documentation.
-# The default value is: NO.
-
-INTERNAL_DOCS          = NO
-
-# If the CASE_SENSE_NAMES tag is set to NO then doxygen will only generate file
-# names in lower-case letters. If set to YES, upper-case letters are also
-# allowed. This is useful if you have classes or files whose names only differ
-# in case and if your file system supports case sensitive file names. Windows
-# and Mac users are advised to set this option to NO.
-# The default value is: system dependent.
-
-CASE_SENSE_NAMES       = NO
-
-# If the HIDE_SCOPE_NAMES tag is set to NO then doxygen will show members with
-# their full class and namespace scopes in the documentation. If set to YES, the
-# scope will be hidden.
-# The default value is: NO.
-
-HIDE_SCOPE_NAMES       = NO
-
-# If the HIDE_COMPOUND_REFERENCE tag is set to NO (default) then doxygen will
-# append additional text to a page's title, such as Class Reference. If set to
-# YES the compound reference will be hidden.
-# The default value is: NO.
-
-HIDE_COMPOUND_REFERENCE= NO
-
-# If the SHOW_INCLUDE_FILES tag is set to YES then doxygen will put a list of
-# the files that are included by a file in the documentation of that file.
-# The default value is: YES.
-
-SHOW_INCLUDE_FILES     = YES
-
-# If the SHOW_GROUPED_MEMB_INC tag is set to YES then Doxygen will add for each
-# grouped member an include statement to the documentation, telling the reader
-# which file to include in order to use the member.
-# The default value is: NO.
-
-SHOW_GROUPED_MEMB_INC  = NO
-
-# If the FORCE_LOCAL_INCLUDES tag is set to YES then doxygen will list include
-# files with double quotes in the documentation rather than with sharp brackets.
-# The default value is: NO.
-
-FORCE_LOCAL_INCLUDES   = NO
-
-# If the INLINE_INFO tag is set to YES then a tag [inline] is inserted in the
-# documentation for inline members.
-# The default value is: YES.
-
-INLINE_INFO            = YES
-
-# If the SORT_MEMBER_DOCS tag is set to YES then doxygen will sort the
-# (detailed) documentation of file and class members alphabetically by member
-# name. If set to NO, the members will appear in declaration order.
-# The default value is: YES.
-
-SORT_MEMBER_DOCS       = YES
-
-# If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the brief
-# descriptions of file, namespace and class members alphabetically by member
-# name. If set to NO, the members will appear in declaration order. Note that
-# this will also influence the order of the classes in the class list.
-# The default value is: NO.
-
-SORT_BRIEF_DOCS        = NO
-
-# If the SORT_MEMBERS_CTORS_1ST tag is set to YES then doxygen will sort the
-# (brief and detailed) documentation of class members so that constructors and
-# destructors are listed first. If set to NO the constructors will appear in the
-# respective orders defined by SORT_BRIEF_DOCS and SORT_MEMBER_DOCS.
-# Note: If SORT_BRIEF_DOCS is set to NO this option is ignored for sorting brief
-# member documentation.
-# Note: If SORT_MEMBER_DOCS is set to NO this option is ignored for sorting
-# detailed member documentation.
-# The default value is: NO.
-
-SORT_MEMBERS_CTORS_1ST = NO
-
-# If the SORT_GROUP_NAMES tag is set to YES then doxygen will sort the hierarchy
-# of group names into alphabetical order. If set to NO the group names will
-# appear in their defined order.
-# The default value is: NO.
-
-SORT_GROUP_NAMES       = NO
-
-# If the SORT_BY_SCOPE_NAME tag is set to YES, the class list will be sorted by
-# fully-qualified names, including namespaces. If set to NO, the class list will
-# be sorted only by class name, not including the namespace part.
-# Note: This option is not very useful if HIDE_SCOPE_NAMES is set to YES.
-# Note: This option applies only to the class list, not to the alphabetical
-# list.
-# The default value is: NO.
-
-SORT_BY_SCOPE_NAME     = NO
-
-# If the STRICT_PROTO_MATCHING option is enabled and doxygen fails to do proper
-# type resolution of all parameters of a function it will reject a match between
-# the prototype and the implementation of a member function even if there is
-# only one candidate or it is obvious which candidate to choose by doing a
-# simple string match. By disabling STRICT_PROTO_MATCHING doxygen will still
-# accept a match between prototype and implementation in such cases.
-# The default value is: NO.
-
-STRICT_PROTO_MATCHING  = NO
-
-# The GENERATE_TODOLIST tag can be used to enable (YES) or disable (NO) the todo
-# list. This list is created by putting \todo commands in the documentation.
-# The default value is: YES.
-
-GENERATE_TODOLIST      = NO
-
-# The GENERATE_TESTLIST tag can be used to enable (YES) or disable (NO) the test
-# list. This list is created by putting \test commands in the documentation.
-# The default value is: YES.
-
-GENERATE_TESTLIST      = YES
-
-# The GENERATE_BUGLIST tag can be used to enable (YES) or disable (NO) the bug
-# list. This list is created by putting \bug commands in the documentation.
-# The default value is: YES.
-
-GENERATE_BUGLIST       = YES
-
-# The GENERATE_DEPRECATEDLIST tag can be used to enable (YES) or disable (NO)
-# the deprecated list. This list is created by putting \deprecated commands in
-# the documentation.
-# The default value is: YES.
-
-GENERATE_DEPRECATEDLIST= YES
-
-# The ENABLED_SECTIONS tag can be used to enable conditional documentation
-# sections, marked by \if <section_label> ... \endif and \cond <section_label>
-# ... \endcond blocks.
-
-ENABLED_SECTIONS       =
-
-# The MAX_INITIALIZER_LINES tag determines the maximum number of lines that the
-# initial value of a variable or macro / define can have for it to appear in the
-# documentation. If the initializer consists of more lines than specified here
-# it will be hidden. Use a value of 0 to hide initializers completely. The
-# appearance of the value of individual variables and macros / defines can be
-# controlled using \showinitializer or \hideinitializer command in the
-# documentation regardless of this setting.
-# Minimum value: 0, maximum value: 10000, default value: 30.
-
-MAX_INITIALIZER_LINES  = 30
-
-# Set the SHOW_USED_FILES tag to NO to disable the list of files generated at
-# the bottom of the documentation of classes and structs. If set to YES, the
-# list will mention the files that were used to generate the documentation.
-# The default value is: YES.
-
-SHOW_USED_FILES        = YES
-
-# Set the SHOW_FILES tag to NO to disable the generation of the Files page. This
-# will remove the Files entry from the Quick Index and from the Folder Tree View
-# (if specified).
-# The default value is: YES.
-
-SHOW_FILES             = YES
-
-# Set the SHOW_NAMESPACES tag to NO to disable the generation of the Namespaces
-# page. This will remove the Namespaces entry from the Quick Index and from the
-# Folder Tree View (if specified).
-# The default value is: YES.
-
-SHOW_NAMESPACES        = YES
-
-# The FILE_VERSION_FILTER tag can be used to specify a program or script that
-# doxygen should invoke to get the current version for each file (typically from
-# the version control system). Doxygen will invoke the program by executing (via
-# popen()) the command command input-file, where command is the value of the
-# FILE_VERSION_FILTER tag, and input-file is the name of an input file provided
-# by doxygen. Whatever the program writes to standard output is used as the file
-# version. For an example see the documentation.
-
-FILE_VERSION_FILTER    =
-
-# The LAYOUT_FILE tag can be used to specify a layout file which will be parsed
-# by doxygen. The layout file controls the global structure of the generated
-# output files in an output format independent way. To create the layout file
-# that represents doxygen's defaults, run doxygen with the -l option. You can
-# optionally specify a file name after the option, if omitted DoxygenLayout.xml
-# will be used as the name of the layout file.
-#
-# Note that if you run doxygen from a directory containing a file called
-# DoxygenLayout.xml, doxygen will parse it automatically even if the LAYOUT_FILE
-# tag is left empty.
-
-LAYOUT_FILE            =
-
-# The CITE_BIB_FILES tag can be used to specify one or more bib files containing
-# the reference definitions. This must be a list of .bib files. The .bib
-# extension is automatically appended if omitted. This requires the bibtex tool
-# to be installed. See also http://en.wikipedia.org/wiki/BibTeX for more info.
-# For LaTeX the style of the bibliography can be controlled using
-# LATEX_BIB_STYLE. To use this feature you need bibtex and perl available in the
-# search path. See also \cite for info how to create references.
-
-CITE_BIB_FILES         =
-
-#---------------------------------------------------------------------------
-# Configuration options related to warning and progress messages
-#---------------------------------------------------------------------------
-
-# The QUIET tag can be used to turn on/off the messages that are generated to
-# standard output by doxygen. If QUIET is set to YES this implies that the
-# messages are off.
-# The default value is: NO.
-
-QUIET                  = NO
-
-# The WARNINGS tag can be used to turn on/off the warning messages that are
-# generated to standard error (stderr) by doxygen. If WARNINGS is set to YES
-# this implies that the warnings are on.
-#
-# Tip: Turn warnings on while writing the documentation.
-# The default value is: YES.
-
-WARNINGS               = YES
-
-# If the WARN_IF_UNDOCUMENTED tag is set to YES then doxygen will generate
-# warnings for undocumented members. If EXTRACT_ALL is set to YES then this flag
-# will automatically be disabled.
-# The default value is: YES.
-
-WARN_IF_UNDOCUMENTED   = YES
-
-# If the WARN_IF_DOC_ERROR tag is set to YES, doxygen will generate warnings for
-# potential errors in the documentation, such as not documenting some parameters
-# in a documented function, or documenting parameters that don't exist or using
-# markup commands wrongly.
-# The default value is: YES.
-
-WARN_IF_DOC_ERROR      = YES
-
-# This WARN_NO_PARAMDOC option can be enabled to get warnings for functions that
-# are documented, but have no documentation for their parameters or return
-# value. If set to NO, doxygen will only warn about wrong or incomplete
-# parameter documentation, but not about the absence of documentation.
-# The default value is: NO.
-
-WARN_NO_PARAMDOC       = NO
-
-# If the WARN_AS_ERROR tag is set to YES then doxygen will immediately stop when
-# a warning is encountered.
-# The default value is: NO.
-
-WARN_AS_ERROR          = NO
-
-# The WARN_FORMAT tag determines the format of the warning messages that doxygen
-# can produce. The string should contain the $file, $line, and $text tags, which
-# will be replaced by the file and line number from which the warning originated
-# and the warning text. Optionally the format may contain $version, which will
-# be replaced by the version of the file (if it could be obtained via
-# FILE_VERSION_FILTER)
-# The default value is: $file:$line: $text.
-
-WARN_FORMAT            = "$file:$line: $text       "
-
-# The WARN_LOGFILE tag can be used to specify a file to which warning and error
-# messages should be written. If left blank the output is written to standard
-# error (stderr).
-
-WARN_LOGFILE           =
-
-#---------------------------------------------------------------------------
-# Configuration options related to the input files
-#---------------------------------------------------------------------------
-
-# The INPUT tag is used to specify the files and/or directories that contain
-# documented source files. You may enter file names like myfile.cpp or
-# directories like /usr/src/myproject. Separate the files or directories with
-# spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
-# Note: If this tag is empty the current directory is searched.
-
-INPUT                  = main_page.h \
-                         ../../src
-
-# This tag can be used to specify the character encoding of the source files
-# that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
-# libiconv (or the iconv built into libc) for the transcoding. See the libiconv
-# documentation (see: http://www.gnu.org/software/libiconv) for the list of
-# possible encodings.
-# The default value is: UTF-8.
-
-INPUT_ENCODING         = UTF-8
-
-# If the value of the INPUT tag contains directories, you can use the
-# FILE_PATTERNS tag to specify one or more wildcard patterns (like *.cpp and
-# *.h) to filter out the source-files in the directories.
-#
-# Note that for custom extensions or not directly supported extensions you also
-# need to set EXTENSION_MAPPING for the extension otherwise the files are not
-# read by doxygen.
-#
-# If left blank the following patterns are tested:*.c, *.cc, *.cxx, *.cpp,
-# *.c++, *.java, *.ii, *.ixx, *.ipp, *.i++, *.inl, *.idl, *.ddl, *.odl, *.h,
-# *.hh, *.hxx, *.hpp, *.h++, *.cs, *.d, *.php, *.php4, *.php5, *.phtml, *.inc,
-# *.m, *.markdown, *.md, *.mm, *.dox, *.py, *.pyw, *.f90, *.f95, *.f03, *.f08,
-# *.f, *.for, *.tcl, *.vhd, *.vhdl, *.ucf and *.qsf.
-
-FILE_PATTERNS          = *.c \
-                         *.cc \
-                         *.cxx \
-                         *.cpp \
-                         *.c++ \
-                         *.java \
-                         *.ii \
-                         *.ixx \
-                         *.ipp \
-                         *.i++ \
-                         *.inl \
-                         *.h \
-                         *.hh \
-                         *.hxx \
-                         *.hpp \
-                         *.h++ \
-                         *.idl \
-                         *.odl \
-                         *.inc \
-                         *.m \
-                         *.mm \
-                         *.dox
-
-# The RECURSIVE tag can be used to specify whether or not subdirectories should
-# be searched for input files as well.
-# The default value is: NO.
-
-RECURSIVE              = YES
-
-# The EXCLUDE tag can be used to specify files and/or directories that should be
-# excluded from the INPUT source files. This way you can easily exclude a
-# subdirectory from a directory tree whose root is specified with the INPUT tag.
-#
-# Note that relative paths are relative to the directory from which doxygen is
-# run.
-
-EXCLUDE                = ../../src/include/netif/ppp/polarssl
-
-# The EXCLUDE_SYMLINKS tag can be used to select whether or not files or
-# directories that are symbolic links (a Unix file system feature) are excluded
-# from the input.
-# The default value is: NO.
-
-EXCLUDE_SYMLINKS       = NO
-
-# If the value of the INPUT tag contains directories, you can use the
-# EXCLUDE_PATTERNS tag to specify one or more wildcard patterns to exclude
-# certain files from those directories.
-#
-# Note that the wildcards are matched against the file with absolute path, so to
-# exclude all test directories for example use the pattern */test/*
-
-EXCLUDE_PATTERNS       =
-
-# The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names
-# (namespaces, classes, functions, etc.) that should be excluded from the
-# output. The symbol name can be a fully qualified name, a word, or if the
-# wildcard * is used, a substring. Examples: ANamespace, AClass,
-# AClass::ANamespace, ANamespace::*Test
-#
-# Note that the wildcards are matched against the file with absolute path, so to
-# exclude all test directories use the pattern */test/*
-
-EXCLUDE_SYMBOLS        =
-
-# The EXAMPLE_PATH tag can be used to specify one or more files or directories
-# that contain example code fragments that are included (see the \include
-# command).
-
-EXAMPLE_PATH           = ../ \
-                         ../../
-
-# If the value of the EXAMPLE_PATH tag contains directories, you can use the
-# EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp and
-# *.h) to filter out the source-files in the directories. If left blank all
-# files are included.
-
-EXAMPLE_PATTERNS       = *
-
-# If the EXAMPLE_RECURSIVE tag is set to YES then subdirectories will be
-# searched for input files to be used with the \include or \dontinclude commands
-# irrespective of the value of the RECURSIVE tag.
-# The default value is: NO.
-
-EXAMPLE_RECURSIVE      = NO
-
-# The IMAGE_PATH tag can be used to specify one or more files or directories
-# that contain images that are to be included in the documentation (see the
-# \image command).
-
-IMAGE_PATH             =
-
-# The INPUT_FILTER tag can be used to specify a program that doxygen should
-# invoke to filter for each input file. Doxygen will invoke the filter program
-# by executing (via popen()) the command:
-#
-# <filter> <input-file>
-#
-# where <filter> is the value of the INPUT_FILTER tag, and <input-file> is the
-# name of an input file. Doxygen will then use the output that the filter
-# program writes to standard output. If FILTER_PATTERNS is specified, this tag
-# will be ignored.
-#
-# Note that the filter must not add or remove lines; it is applied before the
-# code is scanned, but not when the output code is generated. If lines are added
-# or removed, the anchors will not be placed correctly.
-#
-# Note that for custom extensions or not directly supported extensions you also
-# need to set EXTENSION_MAPPING for the extension otherwise the files are not
-# properly processed by doxygen.
-
-INPUT_FILTER           =
-
-# The FILTER_PATTERNS tag can be used to specify filters on a per file pattern
-# basis. Doxygen will compare the file name with each pattern and apply the
-# filter if there is a match. The filters are a list of the form: pattern=filter
-# (like *.cpp=my_cpp_filter). See INPUT_FILTER for further information on how
-# filters are used. If the FILTER_PATTERNS tag is empty or if none of the
-# patterns match the file name, INPUT_FILTER is applied.
-#
-# Note that for custom extensions or not directly supported extensions you also
-# need to set EXTENSION_MAPPING for the extension otherwise the files are not
-# properly processed by doxygen.
-
-FILTER_PATTERNS        =
-
-# If the FILTER_SOURCE_FILES tag is set to YES, the input filter (if set using
-# INPUT_FILTER) will also be used to filter the input files that are used for
-# producing the source files to browse (i.e. when SOURCE_BROWSER is set to YES).
-# The default value is: NO.
-
-FILTER_SOURCE_FILES    = NO
-
-# The FILTER_SOURCE_PATTERNS tag can be used to specify source filters per file
-# pattern. A pattern will override the setting for FILTER_PATTERN (if any) and
-# it is also possible to disable source filtering for a specific pattern using
-# *.ext= (so without naming a filter).
-# This tag requires that the tag FILTER_SOURCE_FILES is set to YES.
-
-FILTER_SOURCE_PATTERNS =
-
-# If the USE_MDFILE_AS_MAINPAGE tag refers to the name of a markdown file that
-# is part of the input, its contents will be placed on the main page
-# (index.html). This can be useful if you have a project on for instance GitHub
-# and want to reuse the introduction page also for the doxygen output.
-
-USE_MDFILE_AS_MAINPAGE = main_page.h
-
-#---------------------------------------------------------------------------
-# Configuration options related to source browsing
-#---------------------------------------------------------------------------
-
-# If the SOURCE_BROWSER tag is set to YES then a list of source files will be
-# generated. Documented entities will be cross-referenced with these sources.
-#
-# Note: To get rid of all source code in the generated output, make sure that
-# also VERBATIM_HEADERS is set to NO.
-# The default value is: NO.
-
-SOURCE_BROWSER         = NO
-
-# Setting the INLINE_SOURCES tag to YES will include the body of functions,
-# classes and enums directly into the documentation.
-# The default value is: NO.
-
-INLINE_SOURCES         = NO
-
-# Setting the STRIP_CODE_COMMENTS tag to YES will instruct doxygen to hide any
-# special comment blocks from generated source code fragments. Normal C, C++ and
-# Fortran comments will always remain visible.
-# The default value is: YES.
-
-STRIP_CODE_COMMENTS    = YES
-
-# If the REFERENCED_BY_RELATION tag is set to YES then for each documented
-# function all documented functions referencing it will be listed.
-# The default value is: NO.
-
-REFERENCED_BY_RELATION = NO
-
-# If the REFERENCES_RELATION tag is set to YES then for each documented function
-# all documented entities called/used by that function will be listed.
-# The default value is: NO.
-
-REFERENCES_RELATION    = NO
-
-# If the REFERENCES_LINK_SOURCE tag is set to YES and SOURCE_BROWSER tag is set
-# to YES then the hyperlinks from functions in REFERENCES_RELATION and
-# REFERENCED_BY_RELATION lists will link to the source code. Otherwise they will
-# link to the documentation.
-# The default value is: YES.
-
-REFERENCES_LINK_SOURCE = YES
-
-# If SOURCE_TOOLTIPS is enabled (the default) then hovering a hyperlink in the
-# source code will show a tooltip with additional information such as prototype,
-# brief description and links to the definition and documentation. Since this
-# will make the HTML file larger and loading of large files a bit slower, you
-# can opt to disable this feature.
-# The default value is: YES.
-# This tag requires that the tag SOURCE_BROWSER is set to YES.
-
-SOURCE_TOOLTIPS        = YES
-
-# If the USE_HTAGS tag is set to YES then the references to source code will
-# point to the HTML generated by the htags(1) tool instead of doxygen built-in
-# source browser. The htags tool is part of GNU's global source tagging system
-# (see http://www.gnu.org/software/global/global.html). You will need version
-# 4.8.6 or higher.
-#
-# To use it do the following:
-# - Install the latest version of global
-# - Enable SOURCE_BROWSER and USE_HTAGS in the config file
-# - Make sure the INPUT points to the root of the source tree
-# - Run doxygen as normal
-#
-# Doxygen will invoke htags (and that will in turn invoke gtags), so these
-# tools must be available from the command line (i.e. in the search path).
-#
-# The result: instead of the source browser generated by doxygen, the links to
-# source code will now point to the output of htags.
-# The default value is: NO.
-# This tag requires that the tag SOURCE_BROWSER is set to YES.
-
-USE_HTAGS              = NO
-
-# If the VERBATIM_HEADERS tag is set the YES then doxygen will generate a
-# verbatim copy of the header file for each class for which an include is
-# specified. Set to NO to disable this.
-# See also: Section \class.
-# The default value is: YES.
-
-VERBATIM_HEADERS       = NO
-
-# If the CLANG_ASSISTED_PARSING tag is set to YES then doxygen will use the
-# clang parser (see: http://clang.llvm.org/) for more accurate parsing at the
-# cost of reduced performance. This can be particularly helpful with template
-# rich C++ code for which doxygen's built-in parser lacks the necessary type
-# information.
-# Note: The availability of this option depends on whether or not doxygen was
-# generated with the -Duse-libclang=ON option for CMake.
-# The default value is: NO.
-
-CLANG_ASSISTED_PARSING = NO
-
-# If clang assisted parsing is enabled you can provide the compiler with command
-# line options that you would normally use when invoking the compiler. Note that
-# the include paths will already be set by doxygen for the files and directories
-# specified with INPUT and INCLUDE_PATH.
-# This tag requires that the tag CLANG_ASSISTED_PARSING is set to YES.
-
-CLANG_OPTIONS          =
-
-#---------------------------------------------------------------------------
-# Configuration options related to the alphabetical class index
-#---------------------------------------------------------------------------
-
-# If the ALPHABETICAL_INDEX tag is set to YES, an alphabetical index of all
-# compounds will be generated. Enable this if the project contains a lot of
-# classes, structs, unions or interfaces.
-# The default value is: YES.
-
-ALPHABETICAL_INDEX     = NO
-
-# The COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns in
-# which the alphabetical index list will be split.
-# Minimum value: 1, maximum value: 20, default value: 5.
-# This tag requires that the tag ALPHABETICAL_INDEX is set to YES.
-
-COLS_IN_ALPHA_INDEX    = 5
-
-# In case all classes in a project start with a common prefix, all classes will
-# be put under the same header in the alphabetical index. The IGNORE_PREFIX tag
-# can be used to specify a prefix (or a list of prefixes) that should be ignored
-# while generating the index headers.
-# This tag requires that the tag ALPHABETICAL_INDEX is set to YES.
-
-IGNORE_PREFIX          =
-
-#---------------------------------------------------------------------------
-# Configuration options related to the HTML output
-#---------------------------------------------------------------------------
-
-# If the GENERATE_HTML tag is set to YES, doxygen will generate HTML output
-# The default value is: YES.
-
-GENERATE_HTML          = YES
-
-# The HTML_OUTPUT tag is used to specify where the HTML docs will be put. If a
-# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
-# it.
-# The default directory is: html.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_OUTPUT            = html
-
-# The HTML_FILE_EXTENSION tag can be used to specify the file extension for each
-# generated HTML page (for example: .htm, .php, .asp).
-# The default value is: .html.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_FILE_EXTENSION    = .html
-
-# The HTML_HEADER tag can be used to specify a user-defined HTML header file for
-# each generated HTML page. If the tag is left blank doxygen will generate a
-# standard header.
-#
-# To get valid HTML the header file that includes any scripts and style sheets
-# that doxygen needs, which is dependent on the configuration options used (e.g.
-# the setting GENERATE_TREEVIEW). It is highly recommended to start with a
-# default header using
-# doxygen -w html new_header.html new_footer.html new_stylesheet.css
-# YourConfigFile
-# and then modify the file new_header.html. See also section "Doxygen usage"
-# for information on how to generate the default header that doxygen normally
-# uses.
-# Note: The header is subject to change so you typically have to regenerate the
-# default header when upgrading to a newer version of doxygen. For a description
-# of the possible markers and block names see the documentation.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_HEADER            =
-
-# The HTML_FOOTER tag can be used to specify a user-defined HTML footer for each
-# generated HTML page. If the tag is left blank doxygen will generate a standard
-# footer. See HTML_HEADER for more information on how to generate a default
-# footer and what special commands can be used inside the footer. See also
-# section "Doxygen usage" for information on how to generate the default footer
-# that doxygen normally uses.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_FOOTER            =
-
-# The HTML_STYLESHEET tag can be used to specify a user-defined cascading style
-# sheet that is used by each HTML page. It can be used to fine-tune the look of
-# the HTML output. If left blank doxygen will generate a default style sheet.
-# See also section "Doxygen usage" for information on how to generate the style
-# sheet that doxygen normally uses.
-# Note: It is recommended to use HTML_EXTRA_STYLESHEET instead of this tag, as
-# it is more robust and this tag (HTML_STYLESHEET) will in the future become
-# obsolete.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_STYLESHEET        =
-
-# The HTML_EXTRA_STYLESHEET tag can be used to specify additional user-defined
-# cascading style sheets that are included after the standard style sheets
-# created by doxygen. Using this option one can overrule certain style aspects.
-# This is preferred over using HTML_STYLESHEET since it does not replace the
-# standard style sheet and is therefore more robust against future updates.
-# Doxygen will copy the style sheet files to the output directory.
-# Note: The order of the extra style sheet files is of importance (e.g. the last
-# style sheet in the list overrules the setting of the previous ones in the
-# list). For an example see the documentation.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_EXTRA_STYLESHEET  =
-
-# The HTML_EXTRA_FILES tag can be used to specify one or more extra images or
-# other source files which should be copied to the HTML output directory. Note
-# that these files will be copied to the base HTML output directory. Use the
-# $relpath^ marker in the HTML_HEADER and/or HTML_FOOTER files to load these
-# files. In the HTML_STYLESHEET file, use the file name only. Also note that the
-# files will be copied as-is; there are no commands or markers available.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_EXTRA_FILES       =
-
-# The HTML_COLORSTYLE_HUE tag controls the color of the HTML output. Doxygen
-# will adjust the colors in the style sheet and background images according to
-# this color. Hue is specified as an angle on a colorwheel, see
-# http://en.wikipedia.org/wiki/Hue for more information. For instance the value
-# 0 represents red, 60 is yellow, 120 is green, 180 is cyan, 240 is blue, 300
-# purple, and 360 is red again.
-# Minimum value: 0, maximum value: 359, default value: 220.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_COLORSTYLE_HUE    = 220
-
-# The HTML_COLORSTYLE_SAT tag controls the purity (or saturation) of the colors
-# in the HTML output. For a value of 0 the output will use grayscales only. A
-# value of 255 will produce the most vivid colors.
-# Minimum value: 0, maximum value: 255, default value: 100.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_COLORSTYLE_SAT    = 100
-
-# The HTML_COLORSTYLE_GAMMA tag controls the gamma correction applied to the
-# luminance component of the colors in the HTML output. Values below 100
-# gradually make the output lighter, whereas values above 100 make the output
-# darker. The value divided by 100 is the actual gamma applied, so 80 represents
-# a gamma of 0.8, The value 220 represents a gamma of 2.2, and 100 does not
-# change the gamma.
-# Minimum value: 40, maximum value: 240, default value: 80.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_COLORSTYLE_GAMMA  = 80
-
-# If the HTML_TIMESTAMP tag is set to YES then the footer of each generated HTML
-# page will contain the date and time when the page was generated. Setting this
-# to YES can help to show when doxygen was last run and thus if the
-# documentation is up to date.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_TIMESTAMP         = NO
-
-# If the HTML_DYNAMIC_SECTIONS tag is set to YES then the generated HTML
-# documentation will contain sections that can be hidden and shown after the
-# page has loaded.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_DYNAMIC_SECTIONS  = NO
-
-# With HTML_INDEX_NUM_ENTRIES one can control the preferred number of entries
-# shown in the various tree structured indices initially; the user can expand
-# and collapse entries dynamically later on. Doxygen will expand the tree to
-# such a level that at most the specified number of entries are visible (unless
-# a fully collapsed tree already exceeds this amount). So setting the number of
-# entries 1 will produce a full collapsed tree by default. 0 is a special value
-# representing an infinite number of entries and will result in a full expanded
-# tree by default.
-# Minimum value: 0, maximum value: 9999, default value: 100.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_INDEX_NUM_ENTRIES = 100
-
-# If the GENERATE_DOCSET tag is set to YES, additional index files will be
-# generated that can be used as input for Apple's Xcode 3 integrated development
-# environment (see: http://developer.apple.com/tools/xcode/), introduced with
-# OSX 10.5 (Leopard). To create a documentation set, doxygen will generate a
-# Makefile in the HTML output directory. Running make will produce the docset in
-# that directory and running make install will install the docset in
-# ~/Library/Developer/Shared/Documentation/DocSets so that Xcode will find it at
-# startup. See http://developer.apple.com/tools/creatingdocsetswithdoxygen.html
-# for more information.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-GENERATE_DOCSET        = NO
-
-# This tag determines the name of the docset feed. A documentation feed provides
-# an umbrella under which multiple documentation sets from a single provider
-# (such as a company or product suite) can be grouped.
-# The default value is: Doxygen generated docs.
-# This tag requires that the tag GENERATE_DOCSET is set to YES.
-
-DOCSET_FEEDNAME        = "Doxygen generated docs"
-
-# This tag specifies a string that should uniquely identify the documentation
-# set bundle. This should be a reverse domain-name style string, e.g.
-# com.mycompany.MyDocSet. Doxygen will append .docset to the name.
-# The default value is: org.doxygen.Project.
-# This tag requires that the tag GENERATE_DOCSET is set to YES.
-
-DOCSET_BUNDLE_ID       = org.doxygen.Project
-
-# The DOCSET_PUBLISHER_ID tag specifies a string that should uniquely identify
-# the documentation publisher. This should be a reverse domain-name style
-# string, e.g. com.mycompany.MyDocSet.documentation.
-# The default value is: org.doxygen.Publisher.
-# This tag requires that the tag GENERATE_DOCSET is set to YES.
-
-DOCSET_PUBLISHER_ID    = org.doxygen.Publisher
-
-# The DOCSET_PUBLISHER_NAME tag identifies the documentation publisher.
-# The default value is: Publisher.
-# This tag requires that the tag GENERATE_DOCSET is set to YES.
-
-DOCSET_PUBLISHER_NAME  = Publisher
-
-# If the GENERATE_HTMLHELP tag is set to YES then doxygen generates three
-# additional HTML index files: index.hhp, index.hhc, and index.hhk. The
-# index.hhp is a project file that can be read by Microsoft's HTML Help Workshop
-# (see: http://www.microsoft.com/en-us/download/details.aspx?id=21138) on
-# Windows.
-#
-# The HTML Help Workshop contains a compiler that can convert all HTML output
-# generated by doxygen into a single compiled HTML file (.chm). Compiled HTML
-# files are now used as the Windows 98 help format, and will replace the old
-# Windows help format (.hlp) on all Windows platforms in the future. Compressed
-# HTML files also contain an index, a table of contents, and you can search for
-# words in the documentation. The HTML workshop also contains a viewer for
-# compressed HTML files.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-GENERATE_HTMLHELP      = NO
-
-# The CHM_FILE tag can be used to specify the file name of the resulting .chm
-# file. You can add a path in front of the file if the result should not be
-# written to the html output directory.
-# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
-
-CHM_FILE               = lwip.chm
-
-# The HHC_LOCATION tag can be used to specify the location (absolute path
-# including file name) of the HTML help compiler (hhc.exe). If non-empty,
-# doxygen will try to run the HTML help compiler on the generated index.hhp.
-# The file has to be specified with full path.
-# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
-
-HHC_LOCATION           =
-
-# The GENERATE_CHI flag controls if a separate .chi index file is generated
-# (YES) or that it should be included in the master .chm file (NO).
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
-
-GENERATE_CHI           = NO
-
-# The CHM_INDEX_ENCODING is used to encode HtmlHelp index (hhk), content (hhc)
-# and project file content.
-# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
-
-CHM_INDEX_ENCODING     =
-
-# The BINARY_TOC flag controls whether a binary table of contents is generated
-# (YES) or a normal table of contents (NO) in the .chm file. Furthermore it
-# enables the Previous and Next buttons.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
-
-BINARY_TOC             = NO
-
-# The TOC_EXPAND flag can be set to YES to add extra items for group members to
-# the table of contents of the HTML help documentation and to the tree view.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
-
-TOC_EXPAND             = NO
-
-# If the GENERATE_QHP tag is set to YES and both QHP_NAMESPACE and
-# QHP_VIRTUAL_FOLDER are set, an additional index file will be generated that
-# can be used as input for Qt's qhelpgenerator to generate a Qt Compressed Help
-# (.qch) of the generated HTML documentation.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-GENERATE_QHP           = NO
-
-# If the QHG_LOCATION tag is specified, the QCH_FILE tag can be used to specify
-# the file name of the resulting .qch file. The path specified is relative to
-# the HTML output folder.
-# This tag requires that the tag GENERATE_QHP is set to YES.
-
-QCH_FILE               =
-
-# The QHP_NAMESPACE tag specifies the namespace to use when generating Qt Help
-# Project output. For more information please see Qt Help Project / Namespace
-# (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#namespace).
-# The default value is: org.doxygen.Project.
-# This tag requires that the tag GENERATE_QHP is set to YES.
-
-QHP_NAMESPACE          = org.doxygen.Project
-
-# The QHP_VIRTUAL_FOLDER tag specifies the namespace to use when generating Qt
-# Help Project output. For more information please see Qt Help Project / Virtual
-# Folders (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#virtual-
-# folders).
-# The default value is: doc.
-# This tag requires that the tag GENERATE_QHP is set to YES.
-
-QHP_VIRTUAL_FOLDER     = doc
-
-# If the QHP_CUST_FILTER_NAME tag is set, it specifies the name of a custom
-# filter to add. For more information please see Qt Help Project / Custom
-# Filters (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#custom-
-# filters).
-# This tag requires that the tag GENERATE_QHP is set to YES.
-
-QHP_CUST_FILTER_NAME   =
-
-# The QHP_CUST_FILTER_ATTRS tag specifies the list of the attributes of the
-# custom filter to add. For more information please see Qt Help Project / Custom
-# Filters (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#custom-
-# filters).
-# This tag requires that the tag GENERATE_QHP is set to YES.
-
-QHP_CUST_FILTER_ATTRS  =
-
-# The QHP_SECT_FILTER_ATTRS tag specifies the list of the attributes this
-# project's filter section matches. Qt Help Project / Filter Attributes (see:
-# http://qt-project.org/doc/qt-4.8/qthelpproject.html#filter-attributes).
-# This tag requires that the tag GENERATE_QHP is set to YES.
-
-QHP_SECT_FILTER_ATTRS  =
-
-# The QHG_LOCATION tag can be used to specify the location of Qt's
-# qhelpgenerator. If non-empty doxygen will try to run qhelpgenerator on the
-# generated .qhp file.
-# This tag requires that the tag GENERATE_QHP is set to YES.
-
-QHG_LOCATION           =
-
-# If the GENERATE_ECLIPSEHELP tag is set to YES, additional index files will be
-# generated, together with the HTML files, they form an Eclipse help plugin. To
-# install this plugin and make it available under the help contents menu in
-# Eclipse, the contents of the directory containing the HTML and XML files needs
-# to be copied into the plugins directory of eclipse. The name of the directory
-# within the plugins directory should be the same as the ECLIPSE_DOC_ID value.
-# After copying Eclipse needs to be restarted before the help appears.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-GENERATE_ECLIPSEHELP   = NO
-
-# A unique identifier for the Eclipse help plugin. When installing the plugin
-# the directory name containing the HTML and XML files should also have this
-# name. Each documentation set should have its own identifier.
-# The default value is: org.doxygen.Project.
-# This tag requires that the tag GENERATE_ECLIPSEHELP is set to YES.
-
-ECLIPSE_DOC_ID         = org.doxygen.Project
-
-# If you want full control over the layout of the generated HTML pages it might
-# be necessary to disable the index and replace it with your own. The
-# DISABLE_INDEX tag can be used to turn on/off the condensed index (tabs) at top
-# of each HTML page. A value of NO enables the index and the value YES disables
-# it. Since the tabs in the index contain the same information as the navigation
-# tree, you can set this option to YES if you also set GENERATE_TREEVIEW to YES.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-DISABLE_INDEX          = NO
-
-# The GENERATE_TREEVIEW tag is used to specify whether a tree-like index
-# structure should be generated to display hierarchical information. If the tag
-# value is set to YES, a side panel will be generated containing a tree-like
-# index structure (just like the one that is generated for HTML Help). For this
-# to work a browser that supports JavaScript, DHTML, CSS and frames is required
-# (i.e. any modern browser). Windows users are probably better off using the
-# HTML help feature. Via custom style sheets (see HTML_EXTRA_STYLESHEET) one can
-# further fine-tune the look of the index. As an example, the default style
-# sheet generated by doxygen has an example that shows how to put an image at
-# the root of the tree instead of the PROJECT_NAME. Since the tree basically has
-# the same information as the tab index, you could consider setting
-# DISABLE_INDEX to YES when enabling this option.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-GENERATE_TREEVIEW      = YES
-
-# The ENUM_VALUES_PER_LINE tag can be used to set the number of enum values that
-# doxygen will group on one line in the generated HTML documentation.
-#
-# Note that a value of 0 will completely suppress the enum values from appearing
-# in the overview section.
-# Minimum value: 0, maximum value: 20, default value: 4.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-ENUM_VALUES_PER_LINE   = 4
-
-# If the treeview is enabled (see GENERATE_TREEVIEW) then this tag can be used
-# to set the initial width (in pixels) of the frame in which the tree is shown.
-# Minimum value: 0, maximum value: 1500, default value: 250.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-TREEVIEW_WIDTH         = 250
-
-# If the EXT_LINKS_IN_WINDOW option is set to YES, doxygen will open links to
-# external symbols imported via tag files in a separate window.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-EXT_LINKS_IN_WINDOW    = NO
-
-# Use this tag to change the font size of LaTeX formulas included as images in
-# the HTML documentation. When you change the font size after a successful
-# doxygen run you need to manually remove any form_*.png images from the HTML
-# output directory to force them to be regenerated.
-# Minimum value: 8, maximum value: 50, default value: 10.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-FORMULA_FONTSIZE       = 10
-
-# Use the FORMULA_TRANPARENT tag to determine whether or not the images
-# generated for formulas are transparent PNGs. Transparent PNGs are not
-# supported properly for IE 6.0, but are supported on all modern browsers.
-#
-# Note that when changing this option you need to delete any form_*.png files in
-# the HTML output directory before the changes have effect.
-# The default value is: YES.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-FORMULA_TRANSPARENT    = YES
-
-# Enable the USE_MATHJAX option to render LaTeX formulas using MathJax (see
-# http://www.mathjax.org) which uses client side Javascript for the rendering
-# instead of using pre-rendered bitmaps. Use this if you do not have LaTeX
-# installed or if you want to formulas look prettier in the HTML output. When
-# enabled you may also need to install MathJax separately and configure the path
-# to it using the MATHJAX_RELPATH option.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-USE_MATHJAX            = NO
-
-# When MathJax is enabled you can set the default output format to be used for
-# the MathJax output. See the MathJax site (see:
-# http://docs.mathjax.org/en/latest/output.html) for more details.
-# Possible values are: HTML-CSS (which is slower, but has the best
-# compatibility), NativeMML (i.e. MathML) and SVG.
-# The default value is: HTML-CSS.
-# This tag requires that the tag USE_MATHJAX is set to YES.
-
-MATHJAX_FORMAT         = HTML-CSS
-
-# When MathJax is enabled you need to specify the location relative to the HTML
-# output directory using the MATHJAX_RELPATH option. The destination directory
-# should contain the MathJax.js script. For instance, if the mathjax directory
-# is located at the same level as the HTML output directory, then
-# MATHJAX_RELPATH should be ../mathjax. The default value points to the MathJax
-# Content Delivery Network so you can quickly see the result without installing
-# MathJax. However, it is strongly recommended to install a local copy of
-# MathJax from http://www.mathjax.org before deployment.
-# The default value is: http://cdn.mathjax.org/mathjax/latest.
-# This tag requires that the tag USE_MATHJAX is set to YES.
-
-MATHJAX_RELPATH        = http://cdn.mathjax.org/mathjax/latest
-
-# The MATHJAX_EXTENSIONS tag can be used to specify one or more MathJax
-# extension names that should be enabled during MathJax rendering. For example
-# MATHJAX_EXTENSIONS = TeX/AMSmath TeX/AMSsymbols
-# This tag requires that the tag USE_MATHJAX is set to YES.
-
-MATHJAX_EXTENSIONS     =
-
-# The MATHJAX_CODEFILE tag can be used to specify a file with javascript pieces
-# of code that will be used on startup of the MathJax code. See the MathJax site
-# (see: http://docs.mathjax.org/en/latest/output.html) for more details. For an
-# example see the documentation.
-# This tag requires that the tag USE_MATHJAX is set to YES.
-
-MATHJAX_CODEFILE       =
-
-# When the SEARCHENGINE tag is enabled doxygen will generate a search box for
-# the HTML output. The underlying search engine uses javascript and DHTML and
-# should work on any modern browser. Note that when using HTML help
-# (GENERATE_HTMLHELP), Qt help (GENERATE_QHP), or docsets (GENERATE_DOCSET)
-# there is already a search function so this one should typically be disabled.
-# For large projects the javascript based search engine can be slow, then
-# enabling SERVER_BASED_SEARCH may provide a better solution. It is possible to
-# search using the keyboard; to jump to the search box use <access key> + S
-# (what the <access key> is depends on the OS and browser, but it is typically
-# <CTRL>, <ALT>/<option>, or both). Inside the search box use the <cursor down
-# key> to jump into the search results window, the results can be navigated
-# using the <cursor keys>. Press <Enter> to select an item or <escape> to cancel
-# the search. The filter options can be selected when the cursor is inside the
-# search box by pressing <Shift>+<cursor down>. Also here use the <cursor keys>
-# to select a filter and <Enter> or <escape> to activate or cancel the filter
-# option.
-# The default value is: YES.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-SEARCHENGINE           = YES
-
-# When the SERVER_BASED_SEARCH tag is enabled the search engine will be
-# implemented using a web server instead of a web client using Javascript. There
-# are two flavors of web server based searching depending on the EXTERNAL_SEARCH
-# setting. When disabled, doxygen will generate a PHP script for searching and
-# an index file used by the script. When EXTERNAL_SEARCH is enabled the indexing
-# and searching needs to be provided by external tools. See the section
-# "External Indexing and Searching" for details.
-# The default value is: NO.
-# This tag requires that the tag SEARCHENGINE is set to YES.
-
-SERVER_BASED_SEARCH    = NO
-
-# When EXTERNAL_SEARCH tag is enabled doxygen will no longer generate the PHP
-# script for searching. Instead the search results are written to an XML file
-# which needs to be processed by an external indexer. Doxygen will invoke an
-# external search engine pointed to by the SEARCHENGINE_URL option to obtain the
-# search results.
-#
-# Doxygen ships with an example indexer (doxyindexer) and search engine
-# (doxysearch.cgi) which are based on the open source search engine library
-# Xapian (see: http://xapian.org/).
-#
-# See the section "External Indexing and Searching" for details.
-# The default value is: NO.
-# This tag requires that the tag SEARCHENGINE is set to YES.
-
-EXTERNAL_SEARCH        = NO
-
-# The SEARCHENGINE_URL should point to a search engine hosted by a web server
-# which will return the search results when EXTERNAL_SEARCH is enabled.
-#
-# Doxygen ships with an example indexer (doxyindexer) and search engine
-# (doxysearch.cgi) which are based on the open source search engine library
-# Xapian (see: http://xapian.org/). See the section "External Indexing and
-# Searching" for details.
-# This tag requires that the tag SEARCHENGINE is set to YES.
-
-SEARCHENGINE_URL       =
-
-# When SERVER_BASED_SEARCH and EXTERNAL_SEARCH are both enabled the unindexed
-# search data is written to a file for indexing by an external tool. With the
-# SEARCHDATA_FILE tag the name of this file can be specified.
-# The default file is: searchdata.xml.
-# This tag requires that the tag SEARCHENGINE is set to YES.
-
-SEARCHDATA_FILE        = searchdata.xml
-
-# When SERVER_BASED_SEARCH and EXTERNAL_SEARCH are both enabled the
-# EXTERNAL_SEARCH_ID tag can be used as an identifier for the project. This is
-# useful in combination with EXTRA_SEARCH_MAPPINGS to search through multiple
-# projects and redirect the results back to the right project.
-# This tag requires that the tag SEARCHENGINE is set to YES.
-
-EXTERNAL_SEARCH_ID     =
-
-# The EXTRA_SEARCH_MAPPINGS tag can be used to enable searching through doxygen
-# projects other than the one defined by this configuration file, but that are
-# all added to the same external search index. Each project needs to have a
-# unique id set via EXTERNAL_SEARCH_ID. The search mapping then maps the id of
-# to a relative location where the documentation can be found. The format is:
-# EXTRA_SEARCH_MAPPINGS = tagname1=loc1 tagname2=loc2 ...
-# This tag requires that the tag SEARCHENGINE is set to YES.
-
-EXTRA_SEARCH_MAPPINGS  =
-
-#---------------------------------------------------------------------------
-# Configuration options related to the LaTeX output
-#---------------------------------------------------------------------------
-
-# If the GENERATE_LATEX tag is set to YES, doxygen will generate LaTeX output.
-# The default value is: YES.
-
-GENERATE_LATEX         = NO
-
-# The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put. If a
-# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
-# it.
-# The default directory is: latex.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_OUTPUT           = latex
-
-# The LATEX_CMD_NAME tag can be used to specify the LaTeX command name to be
-# invoked.
-#
-# Note that when enabling USE_PDFLATEX this option is only used for generating
-# bitmaps for formulas in the HTML output, but not in the Makefile that is
-# written to the output directory.
-# The default file is: latex.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_CMD_NAME         = latex
-
-# The MAKEINDEX_CMD_NAME tag can be used to specify the command name to generate
-# index for LaTeX.
-# The default file is: makeindex.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-MAKEINDEX_CMD_NAME     = makeindex
-
-# If the COMPACT_LATEX tag is set to YES, doxygen generates more compact LaTeX
-# documents. This may be useful for small projects and may help to save some
-# trees in general.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-COMPACT_LATEX          = NO
-
-# The PAPER_TYPE tag can be used to set the paper type that is used by the
-# printer.
-# Possible values are: a4 (210 x 297 mm), letter (8.5 x 11 inches), legal (8.5 x
-# 14 inches) and executive (7.25 x 10.5 inches).
-# The default value is: a4.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-PAPER_TYPE             = a4wide
-
-# The EXTRA_PACKAGES tag can be used to specify one or more LaTeX package names
-# that should be included in the LaTeX output. The package can be specified just
-# by its name or with the correct syntax as to be used with the LaTeX
-# \usepackage command. To get the times font for instance you can specify :
-# EXTRA_PACKAGES=times or EXTRA_PACKAGES={times}
-# To use the option intlimits with the amsmath package you can specify:
-# EXTRA_PACKAGES=[intlimits]{amsmath}
-# If left blank no extra packages will be included.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-EXTRA_PACKAGES         =
-
-# The LATEX_HEADER tag can be used to specify a personal LaTeX header for the
-# generated LaTeX document. The header should contain everything until the first
-# chapter. If it is left blank doxygen will generate a standard header. See
-# section "Doxygen usage" for information on how to let doxygen write the
-# default header to a separate file.
-#
-# Note: Only use a user-defined header if you know what you are doing! The
-# following commands have a special meaning inside the header: $title,
-# $datetime, $date, $doxygenversion, $projectname, $projectnumber,
-# $projectbrief, $projectlogo. Doxygen will replace $title with the empty
-# string, for the replacement values of the other commands the user is referred
-# to HTML_HEADER.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_HEADER           =
-
-# The LATEX_FOOTER tag can be used to specify a personal LaTeX footer for the
-# generated LaTeX document. The footer should contain everything after the last
-# chapter. If it is left blank doxygen will generate a standard footer. See
-# LATEX_HEADER for more information on how to generate a default footer and what
-# special commands can be used inside the footer.
-#
-# Note: Only use a user-defined footer if you know what you are doing!
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_FOOTER           =
-
-# The LATEX_EXTRA_STYLESHEET tag can be used to specify additional user-defined
-# LaTeX style sheets that are included after the standard style sheets created
-# by doxygen. Using this option one can overrule certain style aspects. Doxygen
-# will copy the style sheet files to the output directory.
-# Note: The order of the extra style sheet files is of importance (e.g. the last
-# style sheet in the list overrules the setting of the previous ones in the
-# list).
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_EXTRA_STYLESHEET =
-
-# The LATEX_EXTRA_FILES tag can be used to specify one or more extra images or
-# other source files which should be copied to the LATEX_OUTPUT output
-# directory. Note that the files will be copied as-is; there are no commands or
-# markers available.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_EXTRA_FILES      =
-
-# If the PDF_HYPERLINKS tag is set to YES, the LaTeX that is generated is
-# prepared for conversion to PDF (using ps2pdf or pdflatex). The PDF file will
-# contain links (just like the HTML output) instead of page references. This
-# makes the output suitable for online browsing using a PDF viewer.
-# The default value is: YES.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-PDF_HYPERLINKS         = NO
-
-# If the USE_PDFLATEX tag is set to YES, doxygen will use pdflatex to generate
-# the PDF file directly from the LaTeX files. Set this option to YES, to get a
-# higher quality PDF documentation.
-# The default value is: YES.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-USE_PDFLATEX           = NO
-
-# If the LATEX_BATCHMODE tag is set to YES, doxygen will add the \batchmode
-# command to the generated LaTeX files. This will instruct LaTeX to keep running
-# if errors occur, instead of asking the user for help. This option is also used
-# when generating formulas in HTML.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_BATCHMODE        = NO
-
-# If the LATEX_HIDE_INDICES tag is set to YES then doxygen will not include the
-# index chapters (such as File Index, Compound Index, etc.) in the output.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_HIDE_INDICES     = NO
-
-# If the LATEX_SOURCE_CODE tag is set to YES then doxygen will include source
-# code with syntax highlighting in the LaTeX output.
-#
-# Note that which sources are shown also depends on other settings such as
-# SOURCE_BROWSER.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_SOURCE_CODE      = NO
-
-# The LATEX_BIB_STYLE tag can be used to specify the style to use for the
-# bibliography, e.g. plainnat, or ieeetr. See
-# http://en.wikipedia.org/wiki/BibTeX and \cite for more info.
-# The default value is: plain.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_BIB_STYLE        = plain
-
-# If the LATEX_TIMESTAMP tag is set to YES then the footer of each generated
-# page will contain the date and time when the page was generated. Setting this
-# to NO can help when comparing the output of multiple runs.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_TIMESTAMP        = NO
-
-#---------------------------------------------------------------------------
-# Configuration options related to the RTF output
-#---------------------------------------------------------------------------
-
-# If the GENERATE_RTF tag is set to YES, doxygen will generate RTF output. The
-# RTF output is optimized for Word 97 and may not look too pretty with other RTF
-# readers/editors.
-# The default value is: NO.
-
-GENERATE_RTF           = NO
-
-# The RTF_OUTPUT tag is used to specify where the RTF docs will be put. If a
-# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
-# it.
-# The default directory is: rtf.
-# This tag requires that the tag GENERATE_RTF is set to YES.
-
-RTF_OUTPUT             = rtf
-
-# If the COMPACT_RTF tag is set to YES, doxygen generates more compact RTF
-# documents. This may be useful for small projects and may help to save some
-# trees in general.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_RTF is set to YES.
-
-COMPACT_RTF            = NO
-
-# If the RTF_HYPERLINKS tag is set to YES, the RTF that is generated will
-# contain hyperlink fields. The RTF file will contain links (just like the HTML
-# output) instead of page references. This makes the output suitable for online
-# browsing using Word or some other Word compatible readers that support those
-# fields.
-#
-# Note: WordPad (write) and others do not support links.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_RTF is set to YES.
-
-RTF_HYPERLINKS         = NO
-
-# Load stylesheet definitions from file. Syntax is similar to doxygen's config
-# file, i.e. a series of assignments. You only have to provide replacements,
-# missing definitions are set to their default value.
-#
-# See also section "Doxygen usage" for information on how to generate the
-# default style sheet that doxygen normally uses.
-# This tag requires that the tag GENERATE_RTF is set to YES.
-
-RTF_STYLESHEET_FILE    =
-
-# Set optional variables used in the generation of an RTF document. Syntax is
-# similar to doxygen's config file. A template extensions file can be generated
-# using doxygen -e rtf extensionFile.
-# This tag requires that the tag GENERATE_RTF is set to YES.
-
-RTF_EXTENSIONS_FILE    =
-
-# If the RTF_SOURCE_CODE tag is set to YES then doxygen will include source code
-# with syntax highlighting in the RTF output.
-#
-# Note that which sources are shown also depends on other settings such as
-# SOURCE_BROWSER.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_RTF is set to YES.
-
-RTF_SOURCE_CODE        = NO
-
-#---------------------------------------------------------------------------
-# Configuration options related to the man page output
-#---------------------------------------------------------------------------
-
-# If the GENERATE_MAN tag is set to YES, doxygen will generate man pages for
-# classes and files.
-# The default value is: NO.
-
-GENERATE_MAN           = NO
-
-# The MAN_OUTPUT tag is used to specify where the man pages will be put. If a
-# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
-# it. A directory man3 will be created inside the directory specified by
-# MAN_OUTPUT.
-# The default directory is: man.
-# This tag requires that the tag GENERATE_MAN is set to YES.
-
-MAN_OUTPUT             = man
-
-# The MAN_EXTENSION tag determines the extension that is added to the generated
-# man pages. In case the manual section does not start with a number, the number
-# 3 is prepended. The dot (.) at the beginning of the MAN_EXTENSION tag is
-# optional.
-# The default value is: .3.
-# This tag requires that the tag GENERATE_MAN is set to YES.
-
-MAN_EXTENSION          = .3
-
-# The MAN_SUBDIR tag determines the name of the directory created within
-# MAN_OUTPUT in which the man pages are placed. If defaults to man followed by
-# MAN_EXTENSION with the initial . removed.
-# This tag requires that the tag GENERATE_MAN is set to YES.
-
-MAN_SUBDIR             =
-
-# If the MAN_LINKS tag is set to YES and doxygen generates man output, then it
-# will generate one additional man file for each entity documented in the real
-# man page(s). These additional files only source the real man page, but without
-# them the man command would be unable to find the correct page.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_MAN is set to YES.
-
-MAN_LINKS              = NO
-
-#---------------------------------------------------------------------------
-# Configuration options related to the XML output
-#---------------------------------------------------------------------------
-
-# If the GENERATE_XML tag is set to YES, doxygen will generate an XML file that
-# captures the structure of the code including all documentation.
-# The default value is: NO.
-
-GENERATE_XML           = NO
-
-# The XML_OUTPUT tag is used to specify where the XML pages will be put. If a
-# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
-# it.
-# The default directory is: xml.
-# This tag requires that the tag GENERATE_XML is set to YES.
-
-XML_OUTPUT             = xml
-
-# If the XML_PROGRAMLISTING tag is set to YES, doxygen will dump the program
-# listings (including syntax highlighting and cross-referencing information) to
-# the XML output. Note that enabling this will significantly increase the size
-# of the XML output.
-# The default value is: YES.
-# This tag requires that the tag GENERATE_XML is set to YES.
-
-XML_PROGRAMLISTING     = YES
-
-#---------------------------------------------------------------------------
-# Configuration options related to the DOCBOOK output
-#---------------------------------------------------------------------------
-
-# If the GENERATE_DOCBOOK tag is set to YES, doxygen will generate Docbook files
-# that can be used to generate PDF.
-# The default value is: NO.
-
-GENERATE_DOCBOOK       = NO
-
-# The DOCBOOK_OUTPUT tag is used to specify where the Docbook pages will be put.
-# If a relative path is entered the value of OUTPUT_DIRECTORY will be put in
-# front of it.
-# The default directory is: docbook.
-# This tag requires that the tag GENERATE_DOCBOOK is set to YES.
-
-DOCBOOK_OUTPUT         = docbook
-
-# If the DOCBOOK_PROGRAMLISTING tag is set to YES, doxygen will include the
-# program listings (including syntax highlighting and cross-referencing
-# information) to the DOCBOOK output. Note that enabling this will significantly
-# increase the size of the DOCBOOK output.
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-#---------------------------------------------------------------------------
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-# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this
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-#---------------------------------------------------------------------------
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-# The TAGFILES tag can be used to specify one or more tag files. For each tag
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-# Note: Each tag file must have a unique name (where the name does NOT include
-# the path). If a tag file is not located in the directory in which doxygen is
-# run, you must also specify the path to the tagfile here.
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-TAGFILES               =
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-# When a file name is specified after GENERATE_TAGFILE, doxygen will create a
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-# external documentation" for more information about the usage of tag files.
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-GENERATE_TAGFILE       =
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-# If the ALLEXTERNALS tag is set to YES, all external class will be listed in
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-# If the EXTERNAL_GROUPS tag is set to YES, all external groups will be listed
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-# If the EXTERNAL_PAGES tag is set to YES, all external pages will be listed in
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-# The default value is: YES.
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-# The PERL_PATH should be the absolute path and name of the perl script
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-PERL_PATH              = /usr/bin/perl
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-#---------------------------------------------------------------------------
-# Configuration options related to the dot tool
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-# If the CLASS_DIAGRAMS tag is set to YES, doxygen will generate a class diagram
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-CLASS_DIAGRAMS         = YES
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-# You can define message sequence charts within doxygen comments using the \msc
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-MSCGEN_PATH            =
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-# You can include diagrams made with dia in doxygen documentation. Doxygen will
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-DIA_PATH               =
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-# If set to YES the inheritance and collaboration graphs will hide inheritance
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-HIDE_UNDOC_RELATIONS   = YES
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-# If you set the HAVE_DOT tag to YES then doxygen will assume the dot tool is
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-HAVE_DOT               = NO
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-# The DOT_NUM_THREADS specifies the number of dot invocations doxygen is allowed
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-# When you want a differently looking font in the dot files that doxygen
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-# This tag requires that the tag HAVE_DOT is set to YES.
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-DOT_FONTPATH           =
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-# If the CLASS_GRAPH tag is set to YES then doxygen will generate a graph for
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-# If the UML_LOOK tag is set to YES, doxygen will generate inheritance and
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-UML_LOOK               = NO
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-# If the UML_LOOK tag is enabled, the fields and methods are shown inside the
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-CALL_GRAPH             = NO
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-# If the CALLER_GRAPH tag is set to YES then doxygen will generate a caller
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-# Note that enabling this option will significantly increase the time of a run.
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-# This tag requires that the tag HAVE_DOT is set to YES.
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-CALLER_GRAPH           = NO
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-# If the GRAPHICAL_HIERARCHY tag is set to YES then doxygen will graphical
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-# Note that this requires a modern browser other than Internet Explorer. Tested
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-# This tag requires that the tag HAVE_DOT is set to YES.
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-# The DOT_PATH tag can be used to specify the path where the dot tool can be
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-# This tag requires that the tag HAVE_DOT is set to YES.
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-DOT_PATH               =
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-# The DOTFILE_DIRS tag can be used to specify one or more directories that
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-# This tag requires that the tag HAVE_DOT is set to YES.
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-# The DIAFILE_DIRS tag can be used to specify one or more directories that
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-DIAFILE_DIRS           =
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-# When using plantuml, the PLANTUML_JAR_PATH tag should be used to specify the
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-PLANTUML_JAR_PATH      =
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-# When using plantuml, the PLANTUML_CFG_FILE tag can be used to specify a
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-PLANTUML_CFG_FILE      =
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-# When using plantuml, the specified paths are searched for files specified by
-# the !include statement in a plantuml block.
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-PLANTUML_INCLUDE_PATH  =
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-# The DOT_GRAPH_MAX_NODES tag can be used to set the maximum number of nodes
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-MAX_DOT_GRAPH_DEPTH    = 1000
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-# Set the DOT_TRANSPARENT tag to YES to generate images with a transparent
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-# Warning: Depending on the platform used, enabling this option may lead to
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-# The default value is: NO.
-# This tag requires that the tag HAVE_DOT is set to YES.
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-DOT_TRANSPARENT        = NO
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-# Set the DOT_MULTI_TARGETS tag to YES to allow dot to generate multiple output
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-# The default value is: NO.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-DOT_MULTI_TARGETS      = NO
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-# If the GENERATE_LEGEND tag is set to YES doxygen will generate a legend page
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-# The default value is: YES.
-# This tag requires that the tag HAVE_DOT is set to YES.
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-GENERATE_LEGEND        = YES
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-# If the DOT_CLEANUP tag is set to YES, doxygen will remove the intermediate dot
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-# The default value is: YES.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-DOT_CLEANUP            = YES
diff --git a/components/net/lwip-2.1.0/doc/doxygen/lwip.Doxyfile.cmake.in b/components/net/lwip-2.1.0/doc/doxygen/lwip.Doxyfile.cmake.in
deleted file mode 100644
index 063c288745..0000000000
--- a/components/net/lwip-2.1.0/doc/doxygen/lwip.Doxyfile.cmake.in
+++ /dev/null
@@ -1,2531 +0,0 @@
-# Doxyfile 1.8.13
-
-# This file describes the settings to be used by the documentation system
-# doxygen (www.doxygen.org) for a project.
-#
-# All text after a double hash (##) is considered a comment and is placed in
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-#
-# All text after a single hash (#) is considered a comment and will be ignored.
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-# For lists, items can also be appended using:
-# TAG += value [value, ...]
-# Values that contain spaces should be placed between quotes (\" \").
-
-#---------------------------------------------------------------------------
-# Project related configuration options
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-# This tag specifies the encoding used for all characters in the config file
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-# The default value is: UTF-8.
-
-DOXYFILE_ENCODING      = UTF-8
-
-# The PROJECT_NAME tag is a single word (or a sequence of words surrounded by
-# double-quotes, unless you are using Doxywizard) that should identify the
-# project for which the documentation is generated. This name is used in the
-# title of most generated pages and in a few other places.
-# The default value is: My Project.
-
-PROJECT_NAME           = "lwIP"
-
-# The PROJECT_NUMBER tag can be used to enter a project or revision number. This
-# could be handy for archiving the generated documentation or if some version
-# control system is used.
-
-PROJECT_NUMBER         = "${LWIP_VERSION_STRING}"
-
-# Using the PROJECT_BRIEF tag one can provide an optional one line description
-# for a project that appears at the top of each page and should give viewer a
-# quick idea about the purpose of the project. Keep the description short.
-
-PROJECT_BRIEF          = "Lightweight IP stack"
-
-# With the PROJECT_LOGO tag one can specify a logo or an icon that is included
-# in the documentation. The maximum height of the logo should not exceed 55
-# pixels and the maximum width should not exceed 200 pixels. Doxygen will copy
-# the logo to the output directory.
-
-PROJECT_LOGO           =
-
-# The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) path
-# into which the generated documentation will be written. If a relative path is
-# entered, it will be relative to the location where doxygen was started. If
-# left blank the current directory will be used.
-
-OUTPUT_DIRECTORY       = "${DOXYGEN_OUTPUT_DIR}"
-
-# If the CREATE_SUBDIRS tag is set to YES then doxygen will create 4096 sub-
-# directories (in 2 levels) under the output directory of each output format and
-# will distribute the generated files over these directories. Enabling this
-# option can be useful when feeding doxygen a huge amount of source files, where
-# putting all generated files in the same directory would otherwise causes
-# performance problems for the file system.
-# The default value is: NO.
-
-CREATE_SUBDIRS         = NO
-
-# If the ALLOW_UNICODE_NAMES tag is set to YES, doxygen will allow non-ASCII
-# characters to appear in the names of generated files. If set to NO, non-ASCII
-# characters will be escaped, for example _xE3_x81_x84 will be used for Unicode
-# U+3044.
-# The default value is: NO.
-
-ALLOW_UNICODE_NAMES    = NO
-
-# The OUTPUT_LANGUAGE tag is used to specify the language in which all
-# documentation generated by doxygen is written. Doxygen will use this
-# information to generate all constant output in the proper language.
-# Possible values are: Afrikaans, Arabic, Armenian, Brazilian, Catalan, Chinese,
-# Chinese-Traditional, Croatian, Czech, Danish, Dutch, English (United States),
-# Esperanto, Farsi (Persian), Finnish, French, German, Greek, Hungarian,
-# Indonesian, Italian, Japanese, Japanese-en (Japanese with English messages),
-# Korean, Korean-en (Korean with English messages), Latvian, Lithuanian,
-# Macedonian, Norwegian, Persian (Farsi), Polish, Portuguese, Romanian, Russian,
-# Serbian, Serbian-Cyrillic, Slovak, Slovene, Spanish, Swedish, Turkish,
-# Ukrainian and Vietnamese.
-# The default value is: English.
-
-OUTPUT_LANGUAGE        = English
-
-# If the BRIEF_MEMBER_DESC tag is set to YES, doxygen will include brief member
-# descriptions after the members that are listed in the file and class
-# documentation (similar to Javadoc). Set to NO to disable this.
-# The default value is: YES.
-
-BRIEF_MEMBER_DESC      = YES
-
-# If the REPEAT_BRIEF tag is set to YES, doxygen will prepend the brief
-# description of a member or function before the detailed description
-#
-# Note: If both HIDE_UNDOC_MEMBERS and BRIEF_MEMBER_DESC are set to NO, the
-# brief descriptions will be completely suppressed.
-# The default value is: YES.
-
-REPEAT_BRIEF           = YES
-
-# This tag implements a quasi-intelligent brief description abbreviator that is
-# used to form the text in various listings. Each string in this list, if found
-# as the leading text of the brief description, will be stripped from the text
-# and the result, after processing the whole list, is used as the annotated
-# text. Otherwise, the brief description is used as-is. If left blank, the
-# following values are used ($name is automatically replaced with the name of
-# the entity):The $name class, The $name widget, The $name file, is, provides,
-# specifies, contains, represents, a, an and the.
-
-ABBREVIATE_BRIEF       = "The $name class       " \
-                         "The $name widget       " \
-                         "The $name file       " \
-                         is \
-                         provides \
-                         specifies \
-                         contains \
-                         represents \
-                         a \
-                         an \
-                         the
-
-# If the ALWAYS_DETAILED_SEC and REPEAT_BRIEF tags are both set to YES then
-# doxygen will generate a detailed section even if there is only a brief
-# description.
-# The default value is: NO.
-
-ALWAYS_DETAILED_SEC    = NO
-
-# If the INLINE_INHERITED_MEMB tag is set to YES, doxygen will show all
-# inherited members of a class in the documentation of that class as if those
-# members were ordinary class members. Constructors, destructors and assignment
-# operators of the base classes will not be shown.
-# The default value is: NO.
-
-INLINE_INHERITED_MEMB  = NO
-
-# If the FULL_PATH_NAMES tag is set to YES, doxygen will prepend the full path
-# before files name in the file list and in the header files. If set to NO the
-# shortest path that makes the file name unique will be used
-# The default value is: YES.
-
-FULL_PATH_NAMES        = YES
-
-# The STRIP_FROM_PATH tag can be used to strip a user-defined part of the path.
-# Stripping is only done if one of the specified strings matches the left-hand
-# part of the path. The tag can be used to show relative paths in the file list.
-# If left blank the directory from which doxygen is run is used as the path to
-# strip.
-#
-# Note that you can specify absolute paths here, but also relative paths, which
-# will be relative from the directory where doxygen is started.
-# This tag requires that the tag FULL_PATH_NAMES is set to YES.
-
-STRIP_FROM_PATH        = ../../
-
-# The STRIP_FROM_INC_PATH tag can be used to strip a user-defined part of the
-# path mentioned in the documentation of a class, which tells the reader which
-# header file to include in order to use a class. If left blank only the name of
-# the header file containing the class definition is used. Otherwise one should
-# specify the list of include paths that are normally passed to the compiler
-# using the -I flag.
-
-STRIP_FROM_INC_PATH    =
-
-# If the SHORT_NAMES tag is set to YES, doxygen will generate much shorter (but
-# less readable) file names. This can be useful is your file systems doesn't
-# support long names like on DOS, Mac, or CD-ROM.
-# The default value is: NO.
-
-SHORT_NAMES            = NO
-
-# If the JAVADOC_AUTOBRIEF tag is set to YES then doxygen will interpret the
-# first line (until the first dot) of a Javadoc-style comment as the brief
-# description. If set to NO, the Javadoc-style will behave just like regular Qt-
-# style comments (thus requiring an explicit @brief command for a brief
-# description.)
-# The default value is: NO.
-
-JAVADOC_AUTOBRIEF      = NO
-
-# If the QT_AUTOBRIEF tag is set to YES then doxygen will interpret the first
-# line (until the first dot) of a Qt-style comment as the brief description. If
-# set to NO, the Qt-style will behave just like regular Qt-style comments (thus
-# requiring an explicit \brief command for a brief description.)
-# The default value is: NO.
-
-QT_AUTOBRIEF           = NO
-
-# The MULTILINE_CPP_IS_BRIEF tag can be set to YES to make doxygen treat a
-# multi-line C++ special comment block (i.e. a block of //! or /// comments) as
-# a brief description. This used to be the default behavior. The new default is
-# to treat a multi-line C++ comment block as a detailed description. Set this
-# tag to YES if you prefer the old behavior instead.
-#
-# Note that setting this tag to YES also means that rational rose comments are
-# not recognized any more.
-# The default value is: NO.
-
-MULTILINE_CPP_IS_BRIEF = NO
-
-# If the INHERIT_DOCS tag is set to YES then an undocumented member inherits the
-# documentation from any documented member that it re-implements.
-# The default value is: YES.
-
-INHERIT_DOCS           = YES
-
-# If the SEPARATE_MEMBER_PAGES tag is set to YES then doxygen will produce a new
-# page for each member. If set to NO, the documentation of a member will be part
-# of the file/class/namespace that contains it.
-# The default value is: NO.
-
-SEPARATE_MEMBER_PAGES  = NO
-
-# The TAB_SIZE tag can be used to set the number of spaces in a tab. Doxygen
-# uses this value to replace tabs by spaces in code fragments.
-# Minimum value: 1, maximum value: 16, default value: 4.
-
-TAB_SIZE               = 8
-
-# This tag can be used to specify a number of aliases that act as commands in
-# the documentation. An alias has the form:
-# name=value
-# For example adding
-# "sideeffect=@par Side Effects:\n"
-# will allow you to put the command \sideeffect (or @sideeffect) in the
-# documentation, which will result in a user-defined paragraph with heading
-# "Side Effects:". You can put \n's in the value part of an alias to insert
-# newlines.
-
-ALIASES                =
-
-# This tag can be used to specify a number of word-keyword mappings (TCL only).
-# A mapping has the form "name=value". For example adding "class=itcl::class"
-# will allow you to use the command class in the itcl::class meaning.
-
-TCL_SUBST              =
-
-# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C sources
-# only. Doxygen will then generate output that is more tailored for C. For
-# instance, some of the names that are used will be different. The list of all
-# members will be omitted, etc.
-# The default value is: NO.
-
-OPTIMIZE_OUTPUT_FOR_C  = YES
-
-# Set the OPTIMIZE_OUTPUT_JAVA tag to YES if your project consists of Java or
-# Python sources only. Doxygen will then generate output that is more tailored
-# for that language. For instance, namespaces will be presented as packages,
-# qualified scopes will look different, etc.
-# The default value is: NO.
-
-OPTIMIZE_OUTPUT_JAVA   = NO
-
-# Set the OPTIMIZE_FOR_FORTRAN tag to YES if your project consists of Fortran
-# sources. Doxygen will then generate output that is tailored for Fortran.
-# The default value is: NO.
-
-OPTIMIZE_FOR_FORTRAN   = NO
-
-# Set the OPTIMIZE_OUTPUT_VHDL tag to YES if your project consists of VHDL
-# sources. Doxygen will then generate output that is tailored for VHDL.
-# The default value is: NO.
-
-OPTIMIZE_OUTPUT_VHDL   = NO
-
-# Doxygen selects the parser to use depending on the extension of the files it
-# parses. With this tag you can assign which parser to use for a given
-# extension. Doxygen has a built-in mapping, but you can override or extend it
-# using this tag. The format is ext=language, where ext is a file extension, and
-# language is one of the parsers supported by doxygen: IDL, Java, Javascript,
-# C#, C, C++, D, PHP, Objective-C, Python, Fortran (fixed format Fortran:
-# FortranFixed, free formatted Fortran: FortranFree, unknown formatted Fortran:
-# Fortran. In the later case the parser tries to guess whether the code is fixed
-# or free formatted code, this is the default for Fortran type files), VHDL. For
-# instance to make doxygen treat .inc files as Fortran files (default is PHP),
-# and .f files as C (default is Fortran), use: inc=Fortran f=C.
-#
-# Note: For files without extension you can use no_extension as a placeholder.
-#
-# Note that for custom extensions you also need to set FILE_PATTERNS otherwise
-# the files are not read by doxygen.
-
-EXTENSION_MAPPING      =
-
-# If the MARKDOWN_SUPPORT tag is enabled then doxygen pre-processes all comments
-# according to the Markdown format, which allows for more readable
-# documentation. See http://daringfireball.net/projects/markdown/ for details.
-# The output of markdown processing is further processed by doxygen, so you can
-# mix doxygen, HTML, and XML commands with Markdown formatting. Disable only in
-# case of backward compatibilities issues.
-# The default value is: YES.
-
-MARKDOWN_SUPPORT       = YES
-
-# When the TOC_INCLUDE_HEADINGS tag is set to a non-zero value, all headings up
-# to that level are automatically included in the table of contents, even if
-# they do not have an id attribute.
-# Note: This feature currently applies only to Markdown headings.
-# Minimum value: 0, maximum value: 99, default value: 0.
-# This tag requires that the tag MARKDOWN_SUPPORT is set to YES.
-
-TOC_INCLUDE_HEADINGS   = 0
-
-# When enabled doxygen tries to link words that correspond to documented
-# classes, or namespaces to their corresponding documentation. Such a link can
-# be prevented in individual cases by putting a % sign in front of the word or
-# globally by setting AUTOLINK_SUPPORT to NO.
-# The default value is: YES.
-
-AUTOLINK_SUPPORT       = YES
-
-# If you use STL classes (i.e. std::string, std::vector, etc.) but do not want
-# to include (a tag file for) the STL sources as input, then you should set this
-# tag to YES in order to let doxygen match functions declarations and
-# definitions whose arguments contain STL classes (e.g. func(std::string);
-# versus func(std::string) {}). This also make the inheritance and collaboration
-# diagrams that involve STL classes more complete and accurate.
-# The default value is: NO.
-
-BUILTIN_STL_SUPPORT    = NO
-
-# If you use Microsoft's C++/CLI language, you should set this option to YES to
-# enable parsing support.
-# The default value is: NO.
-
-CPP_CLI_SUPPORT        = NO
-
-# Set the SIP_SUPPORT tag to YES if your project consists of sip (see:
-# http://www.riverbankcomputing.co.uk/software/sip/intro) sources only. Doxygen
-# will parse them like normal C++ but will assume all classes use public instead
-# of private inheritance when no explicit protection keyword is present.
-# The default value is: NO.
-
-SIP_SUPPORT            = NO
-
-# For Microsoft's IDL there are propget and propput attributes to indicate
-# getter and setter methods for a property. Setting this option to YES will make
-# doxygen to replace the get and set methods by a property in the documentation.
-# This will only work if the methods are indeed getting or setting a simple
-# type. If this is not the case, or you want to show the methods anyway, you
-# should set this option to NO.
-# The default value is: YES.
-
-IDL_PROPERTY_SUPPORT   = YES
-
-# If member grouping is used in the documentation and the DISTRIBUTE_GROUP_DOC
-# tag is set to YES then doxygen will reuse the documentation of the first
-# member in the group (if any) for the other members of the group. By default
-# all members of a group must be documented explicitly.
-# The default value is: NO.
-
-DISTRIBUTE_GROUP_DOC   = NO
-
-# If one adds a struct or class to a group and this option is enabled, then also
-# any nested class or struct is added to the same group. By default this option
-# is disabled and one has to add nested compounds explicitly via \ingroup.
-# The default value is: NO.
-
-GROUP_NESTED_COMPOUNDS = NO
-
-# Set the SUBGROUPING tag to YES to allow class member groups of the same type
-# (for instance a group of public functions) to be put as a subgroup of that
-# type (e.g. under the Public Functions section). Set it to NO to prevent
-# subgrouping. Alternatively, this can be done per class using the
-# \nosubgrouping command.
-# The default value is: YES.
-
-SUBGROUPING            = YES
-
-# When the INLINE_GROUPED_CLASSES tag is set to YES, classes, structs and unions
-# are shown inside the group in which they are included (e.g. using \ingroup)
-# instead of on a separate page (for HTML and Man pages) or section (for LaTeX
-# and RTF).
-#
-# Note that this feature does not work in combination with
-# SEPARATE_MEMBER_PAGES.
-# The default value is: NO.
-
-INLINE_GROUPED_CLASSES = NO
-
-# When the INLINE_SIMPLE_STRUCTS tag is set to YES, structs, classes, and unions
-# with only public data fields or simple typedef fields will be shown inline in
-# the documentation of the scope in which they are defined (i.e. file,
-# namespace, or group documentation), provided this scope is documented. If set
-# to NO, structs, classes, and unions are shown on a separate page (for HTML and
-# Man pages) or section (for LaTeX and RTF).
-# The default value is: NO.
-
-INLINE_SIMPLE_STRUCTS  = NO
-
-# When TYPEDEF_HIDES_STRUCT tag is enabled, a typedef of a struct, union, or
-# enum is documented as struct, union, or enum with the name of the typedef. So
-# typedef struct TypeS {} TypeT, will appear in the documentation as a struct
-# with name TypeT. When disabled the typedef will appear as a member of a file,
-# namespace, or class. And the struct will be named TypeS. This can typically be
-# useful for C code in case the coding convention dictates that all compound
-# types are typedef'ed and only the typedef is referenced, never the tag name.
-# The default value is: NO.
-
-TYPEDEF_HIDES_STRUCT   = NO
-
-# The size of the symbol lookup cache can be set using LOOKUP_CACHE_SIZE. This
-# cache is used to resolve symbols given their name and scope. Since this can be
-# an expensive process and often the same symbol appears multiple times in the
-# code, doxygen keeps a cache of pre-resolved symbols. If the cache is too small
-# doxygen will become slower. If the cache is too large, memory is wasted. The
-# cache size is given by this formula: 2^(16+LOOKUP_CACHE_SIZE). The valid range
-# is 0..9, the default is 0, corresponding to a cache size of 2^16=65536
-# symbols. At the end of a run doxygen will report the cache usage and suggest
-# the optimal cache size from a speed point of view.
-# Minimum value: 0, maximum value: 9, default value: 0.
-
-LOOKUP_CACHE_SIZE      = 0
-
-#---------------------------------------------------------------------------
-# Build related configuration options
-#---------------------------------------------------------------------------
-
-# If the EXTRACT_ALL tag is set to YES, doxygen will assume all entities in
-# documentation are documented, even if no documentation was available. Private
-# class members and static file members will be hidden unless the
-# EXTRACT_PRIVATE respectively EXTRACT_STATIC tags are set to YES.
-# Note: This will also disable the warnings about undocumented members that are
-# normally produced when WARNINGS is set to YES.
-# The default value is: NO.
-
-EXTRACT_ALL            = NO
-
-# If the EXTRACT_PRIVATE tag is set to YES, all private members of a class will
-# be included in the documentation.
-# The default value is: NO.
-
-EXTRACT_PRIVATE        = NO
-
-# If the EXTRACT_PACKAGE tag is set to YES, all members with package or internal
-# scope will be included in the documentation.
-# The default value is: NO.
-
-EXTRACT_PACKAGE        = NO
-
-# If the EXTRACT_STATIC tag is set to YES, all static members of a file will be
-# included in the documentation.
-# The default value is: NO.
-
-EXTRACT_STATIC         = NO
-
-# If the EXTRACT_LOCAL_CLASSES tag is set to YES, classes (and structs) defined
-# locally in source files will be included in the documentation. If set to NO,
-# only classes defined in header files are included. Does not have any effect
-# for Java sources.
-# The default value is: YES.
-
-EXTRACT_LOCAL_CLASSES  = YES
-
-# This flag is only useful for Objective-C code. If set to YES, local methods,
-# which are defined in the implementation section but not in the interface are
-# included in the documentation. If set to NO, only methods in the interface are
-# included.
-# The default value is: NO.
-
-EXTRACT_LOCAL_METHODS  = NO
-
-# If this flag is set to YES, the members of anonymous namespaces will be
-# extracted and appear in the documentation as a namespace called
-# 'anonymous_namespace{file}', where file will be replaced with the base name of
-# the file that contains the anonymous namespace. By default anonymous namespace
-# are hidden.
-# The default value is: NO.
-
-EXTRACT_ANON_NSPACES   = NO
-
-# If the HIDE_UNDOC_MEMBERS tag is set to YES, doxygen will hide all
-# undocumented members inside documented classes or files. If set to NO these
-# members will be included in the various overviews, but no documentation
-# section is generated. This option has no effect if EXTRACT_ALL is enabled.
-# The default value is: NO.
-
-HIDE_UNDOC_MEMBERS     = YES
-
-# If the HIDE_UNDOC_CLASSES tag is set to YES, doxygen will hide all
-# undocumented classes that are normally visible in the class hierarchy. If set
-# to NO, these classes will be included in the various overviews. This option
-# has no effect if EXTRACT_ALL is enabled.
-# The default value is: NO.
-
-HIDE_UNDOC_CLASSES     = YES
-
-# If the HIDE_FRIEND_COMPOUNDS tag is set to YES, doxygen will hide all friend
-# (class|struct|union) declarations. If set to NO, these declarations will be
-# included in the documentation.
-# The default value is: NO.
-
-HIDE_FRIEND_COMPOUNDS  = NO
-
-# If the HIDE_IN_BODY_DOCS tag is set to YES, doxygen will hide any
-# documentation blocks found inside the body of a function. If set to NO, these
-# blocks will be appended to the function's detailed documentation block.
-# The default value is: NO.
-
-HIDE_IN_BODY_DOCS      = NO
-
-# The INTERNAL_DOCS tag determines if documentation that is typed after a
-# \internal command is included. If the tag is set to NO then the documentation
-# will be excluded. Set it to YES to include the internal documentation.
-# The default value is: NO.
-
-INTERNAL_DOCS          = NO
-
-# If the CASE_SENSE_NAMES tag is set to NO then doxygen will only generate file
-# names in lower-case letters. If set to YES, upper-case letters are also
-# allowed. This is useful if you have classes or files whose names only differ
-# in case and if your file system supports case sensitive file names. Windows
-# and Mac users are advised to set this option to NO.
-# The default value is: system dependent.
-
-CASE_SENSE_NAMES       = NO
-
-# If the HIDE_SCOPE_NAMES tag is set to NO then doxygen will show members with
-# their full class and namespace scopes in the documentation. If set to YES, the
-# scope will be hidden.
-# The default value is: NO.
-
-HIDE_SCOPE_NAMES       = NO
-
-# If the HIDE_COMPOUND_REFERENCE tag is set to NO (default) then doxygen will
-# append additional text to a page's title, such as Class Reference. If set to
-# YES the compound reference will be hidden.
-# The default value is: NO.
-
-HIDE_COMPOUND_REFERENCE= NO
-
-# If the SHOW_INCLUDE_FILES tag is set to YES then doxygen will put a list of
-# the files that are included by a file in the documentation of that file.
-# The default value is: YES.
-
-SHOW_INCLUDE_FILES     = YES
-
-# If the SHOW_GROUPED_MEMB_INC tag is set to YES then Doxygen will add for each
-# grouped member an include statement to the documentation, telling the reader
-# which file to include in order to use the member.
-# The default value is: NO.
-
-SHOW_GROUPED_MEMB_INC  = NO
-
-# If the FORCE_LOCAL_INCLUDES tag is set to YES then doxygen will list include
-# files with double quotes in the documentation rather than with sharp brackets.
-# The default value is: NO.
-
-FORCE_LOCAL_INCLUDES   = NO
-
-# If the INLINE_INFO tag is set to YES then a tag [inline] is inserted in the
-# documentation for inline members.
-# The default value is: YES.
-
-INLINE_INFO            = YES
-
-# If the SORT_MEMBER_DOCS tag is set to YES then doxygen will sort the
-# (detailed) documentation of file and class members alphabetically by member
-# name. If set to NO, the members will appear in declaration order.
-# The default value is: YES.
-
-SORT_MEMBER_DOCS       = YES
-
-# If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the brief
-# descriptions of file, namespace and class members alphabetically by member
-# name. If set to NO, the members will appear in declaration order. Note that
-# this will also influence the order of the classes in the class list.
-# The default value is: NO.
-
-SORT_BRIEF_DOCS        = NO
-
-# If the SORT_MEMBERS_CTORS_1ST tag is set to YES then doxygen will sort the
-# (brief and detailed) documentation of class members so that constructors and
-# destructors are listed first. If set to NO the constructors will appear in the
-# respective orders defined by SORT_BRIEF_DOCS and SORT_MEMBER_DOCS.
-# Note: If SORT_BRIEF_DOCS is set to NO this option is ignored for sorting brief
-# member documentation.
-# Note: If SORT_MEMBER_DOCS is set to NO this option is ignored for sorting
-# detailed member documentation.
-# The default value is: NO.
-
-SORT_MEMBERS_CTORS_1ST = NO
-
-# If the SORT_GROUP_NAMES tag is set to YES then doxygen will sort the hierarchy
-# of group names into alphabetical order. If set to NO the group names will
-# appear in their defined order.
-# The default value is: NO.
-
-SORT_GROUP_NAMES       = NO
-
-# If the SORT_BY_SCOPE_NAME tag is set to YES, the class list will be sorted by
-# fully-qualified names, including namespaces. If set to NO, the class list will
-# be sorted only by class name, not including the namespace part.
-# Note: This option is not very useful if HIDE_SCOPE_NAMES is set to YES.
-# Note: This option applies only to the class list, not to the alphabetical
-# list.
-# The default value is: NO.
-
-SORT_BY_SCOPE_NAME     = NO
-
-# If the STRICT_PROTO_MATCHING option is enabled and doxygen fails to do proper
-# type resolution of all parameters of a function it will reject a match between
-# the prototype and the implementation of a member function even if there is
-# only one candidate or it is obvious which candidate to choose by doing a
-# simple string match. By disabling STRICT_PROTO_MATCHING doxygen will still
-# accept a match between prototype and implementation in such cases.
-# The default value is: NO.
-
-STRICT_PROTO_MATCHING  = NO
-
-# The GENERATE_TODOLIST tag can be used to enable (YES) or disable (NO) the todo
-# list. This list is created by putting \todo commands in the documentation.
-# The default value is: YES.
-
-GENERATE_TODOLIST      = NO
-
-# The GENERATE_TESTLIST tag can be used to enable (YES) or disable (NO) the test
-# list. This list is created by putting \test commands in the documentation.
-# The default value is: YES.
-
-GENERATE_TESTLIST      = YES
-
-# The GENERATE_BUGLIST tag can be used to enable (YES) or disable (NO) the bug
-# list. This list is created by putting \bug commands in the documentation.
-# The default value is: YES.
-
-GENERATE_BUGLIST       = YES
-
-# The GENERATE_DEPRECATEDLIST tag can be used to enable (YES) or disable (NO)
-# the deprecated list. This list is created by putting \deprecated commands in
-# the documentation.
-# The default value is: YES.
-
-GENERATE_DEPRECATEDLIST= YES
-
-# The ENABLED_SECTIONS tag can be used to enable conditional documentation
-# sections, marked by \if <section_label> ... \endif and \cond <section_label>
-# ... \endcond blocks.
-
-ENABLED_SECTIONS       =
-
-# The MAX_INITIALIZER_LINES tag determines the maximum number of lines that the
-# initial value of a variable or macro / define can have for it to appear in the
-# documentation. If the initializer consists of more lines than specified here
-# it will be hidden. Use a value of 0 to hide initializers completely. The
-# appearance of the value of individual variables and macros / defines can be
-# controlled using \showinitializer or \hideinitializer command in the
-# documentation regardless of this setting.
-# Minimum value: 0, maximum value: 10000, default value: 30.
-
-MAX_INITIALIZER_LINES  = 30
-
-# Set the SHOW_USED_FILES tag to NO to disable the list of files generated at
-# the bottom of the documentation of classes and structs. If set to YES, the
-# list will mention the files that were used to generate the documentation.
-# The default value is: YES.
-
-SHOW_USED_FILES        = YES
-
-# Set the SHOW_FILES tag to NO to disable the generation of the Files page. This
-# will remove the Files entry from the Quick Index and from the Folder Tree View
-# (if specified).
-# The default value is: YES.
-
-SHOW_FILES             = YES
-
-# Set the SHOW_NAMESPACES tag to NO to disable the generation of the Namespaces
-# page. This will remove the Namespaces entry from the Quick Index and from the
-# Folder Tree View (if specified).
-# The default value is: YES.
-
-SHOW_NAMESPACES        = YES
-
-# The FILE_VERSION_FILTER tag can be used to specify a program or script that
-# doxygen should invoke to get the current version for each file (typically from
-# the version control system). Doxygen will invoke the program by executing (via
-# popen()) the command command input-file, where command is the value of the
-# FILE_VERSION_FILTER tag, and input-file is the name of an input file provided
-# by doxygen. Whatever the program writes to standard output is used as the file
-# version. For an example see the documentation.
-
-FILE_VERSION_FILTER    =
-
-# The LAYOUT_FILE tag can be used to specify a layout file which will be parsed
-# by doxygen. The layout file controls the global structure of the generated
-# output files in an output format independent way. To create the layout file
-# that represents doxygen's defaults, run doxygen with the -l option. You can
-# optionally specify a file name after the option, if omitted DoxygenLayout.xml
-# will be used as the name of the layout file.
-#
-# Note that if you run doxygen from a directory containing a file called
-# DoxygenLayout.xml, doxygen will parse it automatically even if the LAYOUT_FILE
-# tag is left empty.
-
-LAYOUT_FILE            =
-
-# The CITE_BIB_FILES tag can be used to specify one or more bib files containing
-# the reference definitions. This must be a list of .bib files. The .bib
-# extension is automatically appended if omitted. This requires the bibtex tool
-# to be installed. See also http://en.wikipedia.org/wiki/BibTeX for more info.
-# For LaTeX the style of the bibliography can be controlled using
-# LATEX_BIB_STYLE. To use this feature you need bibtex and perl available in the
-# search path. See also \cite for info how to create references.
-
-CITE_BIB_FILES         =
-
-#---------------------------------------------------------------------------
-# Configuration options related to warning and progress messages
-#---------------------------------------------------------------------------
-
-# The QUIET tag can be used to turn on/off the messages that are generated to
-# standard output by doxygen. If QUIET is set to YES this implies that the
-# messages are off.
-# The default value is: NO.
-
-QUIET                  = NO
-
-# The WARNINGS tag can be used to turn on/off the warning messages that are
-# generated to standard error (stderr) by doxygen. If WARNINGS is set to YES
-# this implies that the warnings are on.
-#
-# Tip: Turn warnings on while writing the documentation.
-# The default value is: YES.
-
-WARNINGS               = YES
-
-# If the WARN_IF_UNDOCUMENTED tag is set to YES then doxygen will generate
-# warnings for undocumented members. If EXTRACT_ALL is set to YES then this flag
-# will automatically be disabled.
-# The default value is: YES.
-
-WARN_IF_UNDOCUMENTED   = YES
-
-# If the WARN_IF_DOC_ERROR tag is set to YES, doxygen will generate warnings for
-# potential errors in the documentation, such as not documenting some parameters
-# in a documented function, or documenting parameters that don't exist or using
-# markup commands wrongly.
-# The default value is: YES.
-
-WARN_IF_DOC_ERROR      = YES
-
-# This WARN_NO_PARAMDOC option can be enabled to get warnings for functions that
-# are documented, but have no documentation for their parameters or return
-# value. If set to NO, doxygen will only warn about wrong or incomplete
-# parameter documentation, but not about the absence of documentation.
-# The default value is: NO.
-
-WARN_NO_PARAMDOC       = NO
-
-# If the WARN_AS_ERROR tag is set to YES then doxygen will immediately stop when
-# a warning is encountered.
-# The default value is: NO.
-
-WARN_AS_ERROR          = NO
-
-# The WARN_FORMAT tag determines the format of the warning messages that doxygen
-# can produce. The string should contain the $file, $line, and $text tags, which
-# will be replaced by the file and line number from which the warning originated
-# and the warning text. Optionally the format may contain $version, which will
-# be replaced by the version of the file (if it could be obtained via
-# FILE_VERSION_FILTER)
-# The default value is: $file:$line: $text.
-
-WARN_FORMAT            = "$file:$line: $text       "
-
-# The WARN_LOGFILE tag can be used to specify a file to which warning and error
-# messages should be written. If left blank the output is written to standard
-# error (stderr).
-
-WARN_LOGFILE           =
-
-#---------------------------------------------------------------------------
-# Configuration options related to the input files
-#---------------------------------------------------------------------------
-
-# The INPUT tag is used to specify the files and/or directories that contain
-# documented source files. You may enter file names like myfile.cpp or
-# directories like /usr/src/myproject. Separate the files or directories with
-# spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
-# Note: If this tag is empty the current directory is searched.
-
-INPUT                  = main_page.h \
-                         ../../src
-
-# This tag can be used to specify the character encoding of the source files
-# that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
-# libiconv (or the iconv built into libc) for the transcoding. See the libiconv
-# documentation (see: http://www.gnu.org/software/libiconv) for the list of
-# possible encodings.
-# The default value is: UTF-8.
-
-INPUT_ENCODING         = UTF-8
-
-# If the value of the INPUT tag contains directories, you can use the
-# FILE_PATTERNS tag to specify one or more wildcard patterns (like *.cpp and
-# *.h) to filter out the source-files in the directories.
-#
-# Note that for custom extensions or not directly supported extensions you also
-# need to set EXTENSION_MAPPING for the extension otherwise the files are not
-# read by doxygen.
-#
-# If left blank the following patterns are tested:*.c, *.cc, *.cxx, *.cpp,
-# *.c++, *.java, *.ii, *.ixx, *.ipp, *.i++, *.inl, *.idl, *.ddl, *.odl, *.h,
-# *.hh, *.hxx, *.hpp, *.h++, *.cs, *.d, *.php, *.php4, *.php5, *.phtml, *.inc,
-# *.m, *.markdown, *.md, *.mm, *.dox, *.py, *.pyw, *.f90, *.f95, *.f03, *.f08,
-# *.f, *.for, *.tcl, *.vhd, *.vhdl, *.ucf and *.qsf.
-
-FILE_PATTERNS          = *.c \
-                         *.cc \
-                         *.cxx \
-                         *.cpp \
-                         *.c++ \
-                         *.java \
-                         *.ii \
-                         *.ixx \
-                         *.ipp \
-                         *.i++ \
-                         *.inl \
-                         *.h \
-                         *.hh \
-                         *.hxx \
-                         *.hpp \
-                         *.h++ \
-                         *.idl \
-                         *.odl \
-                         *.inc \
-                         *.m \
-                         *.mm \
-                         *.dox
-
-# The RECURSIVE tag can be used to specify whether or not subdirectories should
-# be searched for input files as well.
-# The default value is: NO.
-
-RECURSIVE              = YES
-
-# The EXCLUDE tag can be used to specify files and/or directories that should be
-# excluded from the INPUT source files. This way you can easily exclude a
-# subdirectory from a directory tree whose root is specified with the INPUT tag.
-#
-# Note that relative paths are relative to the directory from which doxygen is
-# run.
-
-EXCLUDE                = ../../src/include/netif/ppp/polarssl
-
-# The EXCLUDE_SYMLINKS tag can be used to select whether or not files or
-# directories that are symbolic links (a Unix file system feature) are excluded
-# from the input.
-# The default value is: NO.
-
-EXCLUDE_SYMLINKS       = NO
-
-# If the value of the INPUT tag contains directories, you can use the
-# EXCLUDE_PATTERNS tag to specify one or more wildcard patterns to exclude
-# certain files from those directories.
-#
-# Note that the wildcards are matched against the file with absolute path, so to
-# exclude all test directories for example use the pattern */test/*
-
-EXCLUDE_PATTERNS       =
-
-# The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names
-# (namespaces, classes, functions, etc.) that should be excluded from the
-# output. The symbol name can be a fully qualified name, a word, or if the
-# wildcard * is used, a substring. Examples: ANamespace, AClass,
-# AClass::ANamespace, ANamespace::*Test
-#
-# Note that the wildcards are matched against the file with absolute path, so to
-# exclude all test directories use the pattern */test/*
-
-EXCLUDE_SYMBOLS        =
-
-# The EXAMPLE_PATH tag can be used to specify one or more files or directories
-# that contain example code fragments that are included (see the \include
-# command).
-
-EXAMPLE_PATH           = ../ \
-                         ../../
-
-# If the value of the EXAMPLE_PATH tag contains directories, you can use the
-# EXAMPLE_PATTERNS tag to specify one or more wildcard pattern (like *.cpp and
-# *.h) to filter out the source-files in the directories. If left blank all
-# files are included.
-
-EXAMPLE_PATTERNS       = *
-
-# If the EXAMPLE_RECURSIVE tag is set to YES then subdirectories will be
-# searched for input files to be used with the \include or \dontinclude commands
-# irrespective of the value of the RECURSIVE tag.
-# The default value is: NO.
-
-EXAMPLE_RECURSIVE      = NO
-
-# The IMAGE_PATH tag can be used to specify one or more files or directories
-# that contain images that are to be included in the documentation (see the
-# \image command).
-
-IMAGE_PATH             =
-
-# The INPUT_FILTER tag can be used to specify a program that doxygen should
-# invoke to filter for each input file. Doxygen will invoke the filter program
-# by executing (via popen()) the command:
-#
-# <filter> <input-file>
-#
-# where <filter> is the value of the INPUT_FILTER tag, and <input-file> is the
-# name of an input file. Doxygen will then use the output that the filter
-# program writes to standard output. If FILTER_PATTERNS is specified, this tag
-# will be ignored.
-#
-# Note that the filter must not add or remove lines; it is applied before the
-# code is scanned, but not when the output code is generated. If lines are added
-# or removed, the anchors will not be placed correctly.
-#
-# Note that for custom extensions or not directly supported extensions you also
-# need to set EXTENSION_MAPPING for the extension otherwise the files are not
-# properly processed by doxygen.
-
-INPUT_FILTER           =
-
-# The FILTER_PATTERNS tag can be used to specify filters on a per file pattern
-# basis. Doxygen will compare the file name with each pattern and apply the
-# filter if there is a match. The filters are a list of the form: pattern=filter
-# (like *.cpp=my_cpp_filter). See INPUT_FILTER for further information on how
-# filters are used. If the FILTER_PATTERNS tag is empty or if none of the
-# patterns match the file name, INPUT_FILTER is applied.
-#
-# Note that for custom extensions or not directly supported extensions you also
-# need to set EXTENSION_MAPPING for the extension otherwise the files are not
-# properly processed by doxygen.
-
-FILTER_PATTERNS        =
-
-# If the FILTER_SOURCE_FILES tag is set to YES, the input filter (if set using
-# INPUT_FILTER) will also be used to filter the input files that are used for
-# producing the source files to browse (i.e. when SOURCE_BROWSER is set to YES).
-# The default value is: NO.
-
-FILTER_SOURCE_FILES    = NO
-
-# The FILTER_SOURCE_PATTERNS tag can be used to specify source filters per file
-# pattern. A pattern will override the setting for FILTER_PATTERN (if any) and
-# it is also possible to disable source filtering for a specific pattern using
-# *.ext= (so without naming a filter).
-# This tag requires that the tag FILTER_SOURCE_FILES is set to YES.
-
-FILTER_SOURCE_PATTERNS =
-
-# If the USE_MDFILE_AS_MAINPAGE tag refers to the name of a markdown file that
-# is part of the input, its contents will be placed on the main page
-# (index.html). This can be useful if you have a project on for instance GitHub
-# and want to reuse the introduction page also for the doxygen output.
-
-USE_MDFILE_AS_MAINPAGE = main_page.h
-
-#---------------------------------------------------------------------------
-# Configuration options related to source browsing
-#---------------------------------------------------------------------------
-
-# If the SOURCE_BROWSER tag is set to YES then a list of source files will be
-# generated. Documented entities will be cross-referenced with these sources.
-#
-# Note: To get rid of all source code in the generated output, make sure that
-# also VERBATIM_HEADERS is set to NO.
-# The default value is: NO.
-
-SOURCE_BROWSER         = NO
-
-# Setting the INLINE_SOURCES tag to YES will include the body of functions,
-# classes and enums directly into the documentation.
-# The default value is: NO.
-
-INLINE_SOURCES         = NO
-
-# Setting the STRIP_CODE_COMMENTS tag to YES will instruct doxygen to hide any
-# special comment blocks from generated source code fragments. Normal C, C++ and
-# Fortran comments will always remain visible.
-# The default value is: YES.
-
-STRIP_CODE_COMMENTS    = YES
-
-# If the REFERENCED_BY_RELATION tag is set to YES then for each documented
-# function all documented functions referencing it will be listed.
-# The default value is: NO.
-
-REFERENCED_BY_RELATION = NO
-
-# If the REFERENCES_RELATION tag is set to YES then for each documented function
-# all documented entities called/used by that function will be listed.
-# The default value is: NO.
-
-REFERENCES_RELATION    = NO
-
-# If the REFERENCES_LINK_SOURCE tag is set to YES and SOURCE_BROWSER tag is set
-# to YES then the hyperlinks from functions in REFERENCES_RELATION and
-# REFERENCED_BY_RELATION lists will link to the source code. Otherwise they will
-# link to the documentation.
-# The default value is: YES.
-
-REFERENCES_LINK_SOURCE = YES
-
-# If SOURCE_TOOLTIPS is enabled (the default) then hovering a hyperlink in the
-# source code will show a tooltip with additional information such as prototype,
-# brief description and links to the definition and documentation. Since this
-# will make the HTML file larger and loading of large files a bit slower, you
-# can opt to disable this feature.
-# The default value is: YES.
-# This tag requires that the tag SOURCE_BROWSER is set to YES.
-
-SOURCE_TOOLTIPS        = YES
-
-# If the USE_HTAGS tag is set to YES then the references to source code will
-# point to the HTML generated by the htags(1) tool instead of doxygen built-in
-# source browser. The htags tool is part of GNU's global source tagging system
-# (see http://www.gnu.org/software/global/global.html). You will need version
-# 4.8.6 or higher.
-#
-# To use it do the following:
-# - Install the latest version of global
-# - Enable SOURCE_BROWSER and USE_HTAGS in the config file
-# - Make sure the INPUT points to the root of the source tree
-# - Run doxygen as normal
-#
-# Doxygen will invoke htags (and that will in turn invoke gtags), so these
-# tools must be available from the command line (i.e. in the search path).
-#
-# The result: instead of the source browser generated by doxygen, the links to
-# source code will now point to the output of htags.
-# The default value is: NO.
-# This tag requires that the tag SOURCE_BROWSER is set to YES.
-
-USE_HTAGS              = NO
-
-# If the VERBATIM_HEADERS tag is set the YES then doxygen will generate a
-# verbatim copy of the header file for each class for which an include is
-# specified. Set to NO to disable this.
-# See also: Section \class.
-# The default value is: YES.
-
-VERBATIM_HEADERS       = NO
-
-# If the CLANG_ASSISTED_PARSING tag is set to YES then doxygen will use the
-# clang parser (see: http://clang.llvm.org/) for more accurate parsing at the
-# cost of reduced performance. This can be particularly helpful with template
-# rich C++ code for which doxygen's built-in parser lacks the necessary type
-# information.
-# Note: The availability of this option depends on whether or not doxygen was
-# generated with the -Duse-libclang=ON option for CMake.
-# The default value is: NO.
-
-CLANG_ASSISTED_PARSING = NO
-
-# If clang assisted parsing is enabled you can provide the compiler with command
-# line options that you would normally use when invoking the compiler. Note that
-# the include paths will already be set by doxygen for the files and directories
-# specified with INPUT and INCLUDE_PATH.
-# This tag requires that the tag CLANG_ASSISTED_PARSING is set to YES.
-
-CLANG_OPTIONS          =
-
-#---------------------------------------------------------------------------
-# Configuration options related to the alphabetical class index
-#---------------------------------------------------------------------------
-
-# If the ALPHABETICAL_INDEX tag is set to YES, an alphabetical index of all
-# compounds will be generated. Enable this if the project contains a lot of
-# classes, structs, unions or interfaces.
-# The default value is: YES.
-
-ALPHABETICAL_INDEX     = NO
-
-# The COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns in
-# which the alphabetical index list will be split.
-# Minimum value: 1, maximum value: 20, default value: 5.
-# This tag requires that the tag ALPHABETICAL_INDEX is set to YES.
-
-COLS_IN_ALPHA_INDEX    = 5
-
-# In case all classes in a project start with a common prefix, all classes will
-# be put under the same header in the alphabetical index. The IGNORE_PREFIX tag
-# can be used to specify a prefix (or a list of prefixes) that should be ignored
-# while generating the index headers.
-# This tag requires that the tag ALPHABETICAL_INDEX is set to YES.
-
-IGNORE_PREFIX          =
-
-#---------------------------------------------------------------------------
-# Configuration options related to the HTML output
-#---------------------------------------------------------------------------
-
-# If the GENERATE_HTML tag is set to YES, doxygen will generate HTML output
-# The default value is: YES.
-
-GENERATE_HTML          = YES
-
-# The HTML_OUTPUT tag is used to specify where the HTML docs will be put. If a
-# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
-# it.
-# The default directory is: html.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_OUTPUT            = html
-
-# The HTML_FILE_EXTENSION tag can be used to specify the file extension for each
-# generated HTML page (for example: .htm, .php, .asp).
-# The default value is: .html.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_FILE_EXTENSION    = .html
-
-# The HTML_HEADER tag can be used to specify a user-defined HTML header file for
-# each generated HTML page. If the tag is left blank doxygen will generate a
-# standard header.
-#
-# To get valid HTML the header file that includes any scripts and style sheets
-# that doxygen needs, which is dependent on the configuration options used (e.g.
-# the setting GENERATE_TREEVIEW). It is highly recommended to start with a
-# default header using
-# doxygen -w html new_header.html new_footer.html new_stylesheet.css
-# YourConfigFile
-# and then modify the file new_header.html. See also section "Doxygen usage"
-# for information on how to generate the default header that doxygen normally
-# uses.
-# Note: The header is subject to change so you typically have to regenerate the
-# default header when upgrading to a newer version of doxygen. For a description
-# of the possible markers and block names see the documentation.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_HEADER            =
-
-# The HTML_FOOTER tag can be used to specify a user-defined HTML footer for each
-# generated HTML page. If the tag is left blank doxygen will generate a standard
-# footer. See HTML_HEADER for more information on how to generate a default
-# footer and what special commands can be used inside the footer. See also
-# section "Doxygen usage" for information on how to generate the default footer
-# that doxygen normally uses.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_FOOTER            =
-
-# The HTML_STYLESHEET tag can be used to specify a user-defined cascading style
-# sheet that is used by each HTML page. It can be used to fine-tune the look of
-# the HTML output. If left blank doxygen will generate a default style sheet.
-# See also section "Doxygen usage" for information on how to generate the style
-# sheet that doxygen normally uses.
-# Note: It is recommended to use HTML_EXTRA_STYLESHEET instead of this tag, as
-# it is more robust and this tag (HTML_STYLESHEET) will in the future become
-# obsolete.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_STYLESHEET        =
-
-# The HTML_EXTRA_STYLESHEET tag can be used to specify additional user-defined
-# cascading style sheets that are included after the standard style sheets
-# created by doxygen. Using this option one can overrule certain style aspects.
-# This is preferred over using HTML_STYLESHEET since it does not replace the
-# standard style sheet and is therefore more robust against future updates.
-# Doxygen will copy the style sheet files to the output directory.
-# Note: The order of the extra style sheet files is of importance (e.g. the last
-# style sheet in the list overrules the setting of the previous ones in the
-# list). For an example see the documentation.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_EXTRA_STYLESHEET  =
-
-# The HTML_EXTRA_FILES tag can be used to specify one or more extra images or
-# other source files which should be copied to the HTML output directory. Note
-# that these files will be copied to the base HTML output directory. Use the
-# $relpath^ marker in the HTML_HEADER and/or HTML_FOOTER files to load these
-# files. In the HTML_STYLESHEET file, use the file name only. Also note that the
-# files will be copied as-is; there are no commands or markers available.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_EXTRA_FILES       =
-
-# The HTML_COLORSTYLE_HUE tag controls the color of the HTML output. Doxygen
-# will adjust the colors in the style sheet and background images according to
-# this color. Hue is specified as an angle on a colorwheel, see
-# http://en.wikipedia.org/wiki/Hue for more information. For instance the value
-# 0 represents red, 60 is yellow, 120 is green, 180 is cyan, 240 is blue, 300
-# purple, and 360 is red again.
-# Minimum value: 0, maximum value: 359, default value: 220.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_COLORSTYLE_HUE    = 220
-
-# The HTML_COLORSTYLE_SAT tag controls the purity (or saturation) of the colors
-# in the HTML output. For a value of 0 the output will use grayscales only. A
-# value of 255 will produce the most vivid colors.
-# Minimum value: 0, maximum value: 255, default value: 100.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_COLORSTYLE_SAT    = 100
-
-# The HTML_COLORSTYLE_GAMMA tag controls the gamma correction applied to the
-# luminance component of the colors in the HTML output. Values below 100
-# gradually make the output lighter, whereas values above 100 make the output
-# darker. The value divided by 100 is the actual gamma applied, so 80 represents
-# a gamma of 0.8, The value 220 represents a gamma of 2.2, and 100 does not
-# change the gamma.
-# Minimum value: 40, maximum value: 240, default value: 80.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_COLORSTYLE_GAMMA  = 80
-
-# If the HTML_TIMESTAMP tag is set to YES then the footer of each generated HTML
-# page will contain the date and time when the page was generated. Setting this
-# to YES can help to show when doxygen was last run and thus if the
-# documentation is up to date.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_TIMESTAMP         = NO
-
-# If the HTML_DYNAMIC_SECTIONS tag is set to YES then the generated HTML
-# documentation will contain sections that can be hidden and shown after the
-# page has loaded.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_DYNAMIC_SECTIONS  = NO
-
-# With HTML_INDEX_NUM_ENTRIES one can control the preferred number of entries
-# shown in the various tree structured indices initially; the user can expand
-# and collapse entries dynamically later on. Doxygen will expand the tree to
-# such a level that at most the specified number of entries are visible (unless
-# a fully collapsed tree already exceeds this amount). So setting the number of
-# entries 1 will produce a full collapsed tree by default. 0 is a special value
-# representing an infinite number of entries and will result in a full expanded
-# tree by default.
-# Minimum value: 0, maximum value: 9999, default value: 100.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_INDEX_NUM_ENTRIES = 100
-
-# If the GENERATE_DOCSET tag is set to YES, additional index files will be
-# generated that can be used as input for Apple's Xcode 3 integrated development
-# environment (see: http://developer.apple.com/tools/xcode/), introduced with
-# OSX 10.5 (Leopard). To create a documentation set, doxygen will generate a
-# Makefile in the HTML output directory. Running make will produce the docset in
-# that directory and running make install will install the docset in
-# ~/Library/Developer/Shared/Documentation/DocSets so that Xcode will find it at
-# startup. See http://developer.apple.com/tools/creatingdocsetswithdoxygen.html
-# for more information.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-GENERATE_DOCSET        = NO
-
-# This tag determines the name of the docset feed. A documentation feed provides
-# an umbrella under which multiple documentation sets from a single provider
-# (such as a company or product suite) can be grouped.
-# The default value is: Doxygen generated docs.
-# This tag requires that the tag GENERATE_DOCSET is set to YES.
-
-DOCSET_FEEDNAME        = "Doxygen generated docs"
-
-# This tag specifies a string that should uniquely identify the documentation
-# set bundle. This should be a reverse domain-name style string, e.g.
-# com.mycompany.MyDocSet. Doxygen will append .docset to the name.
-# The default value is: org.doxygen.Project.
-# This tag requires that the tag GENERATE_DOCSET is set to YES.
-
-DOCSET_BUNDLE_ID       = org.doxygen.Project
-
-# The DOCSET_PUBLISHER_ID tag specifies a string that should uniquely identify
-# the documentation publisher. This should be a reverse domain-name style
-# string, e.g. com.mycompany.MyDocSet.documentation.
-# The default value is: org.doxygen.Publisher.
-# This tag requires that the tag GENERATE_DOCSET is set to YES.
-
-DOCSET_PUBLISHER_ID    = org.doxygen.Publisher
-
-# The DOCSET_PUBLISHER_NAME tag identifies the documentation publisher.
-# The default value is: Publisher.
-# This tag requires that the tag GENERATE_DOCSET is set to YES.
-
-DOCSET_PUBLISHER_NAME  = Publisher
-
-# If the GENERATE_HTMLHELP tag is set to YES then doxygen generates three
-# additional HTML index files: index.hhp, index.hhc, and index.hhk. The
-# index.hhp is a project file that can be read by Microsoft's HTML Help Workshop
-# (see: http://www.microsoft.com/en-us/download/details.aspx?id=21138) on
-# Windows.
-#
-# The HTML Help Workshop contains a compiler that can convert all HTML output
-# generated by doxygen into a single compiled HTML file (.chm). Compiled HTML
-# files are now used as the Windows 98 help format, and will replace the old
-# Windows help format (.hlp) on all Windows platforms in the future. Compressed
-# HTML files also contain an index, a table of contents, and you can search for
-# words in the documentation. The HTML workshop also contains a viewer for
-# compressed HTML files.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-GENERATE_HTMLHELP      = NO
-
-# The CHM_FILE tag can be used to specify the file name of the resulting .chm
-# file. You can add a path in front of the file if the result should not be
-# written to the html output directory.
-# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
-
-CHM_FILE               = lwip.chm
-
-# The HHC_LOCATION tag can be used to specify the location (absolute path
-# including file name) of the HTML help compiler (hhc.exe). If non-empty,
-# doxygen will try to run the HTML help compiler on the generated index.hhp.
-# The file has to be specified with full path.
-# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
-
-HHC_LOCATION           =
-
-# The GENERATE_CHI flag controls if a separate .chi index file is generated
-# (YES) or that it should be included in the master .chm file (NO).
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
-
-GENERATE_CHI           = NO
-
-# The CHM_INDEX_ENCODING is used to encode HtmlHelp index (hhk), content (hhc)
-# and project file content.
-# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
-
-CHM_INDEX_ENCODING     =
-
-# The BINARY_TOC flag controls whether a binary table of contents is generated
-# (YES) or a normal table of contents (NO) in the .chm file. Furthermore it
-# enables the Previous and Next buttons.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
-
-BINARY_TOC             = NO
-
-# The TOC_EXPAND flag can be set to YES to add extra items for group members to
-# the table of contents of the HTML help documentation and to the tree view.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTMLHELP is set to YES.
-
-TOC_EXPAND             = NO
-
-# If the GENERATE_QHP tag is set to YES and both QHP_NAMESPACE and
-# QHP_VIRTUAL_FOLDER are set, an additional index file will be generated that
-# can be used as input for Qt's qhelpgenerator to generate a Qt Compressed Help
-# (.qch) of the generated HTML documentation.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-GENERATE_QHP           = NO
-
-# If the QHG_LOCATION tag is specified, the QCH_FILE tag can be used to specify
-# the file name of the resulting .qch file. The path specified is relative to
-# the HTML output folder.
-# This tag requires that the tag GENERATE_QHP is set to YES.
-
-QCH_FILE               =
-
-# The QHP_NAMESPACE tag specifies the namespace to use when generating Qt Help
-# Project output. For more information please see Qt Help Project / Namespace
-# (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#namespace).
-# The default value is: org.doxygen.Project.
-# This tag requires that the tag GENERATE_QHP is set to YES.
-
-QHP_NAMESPACE          = org.doxygen.Project
-
-# The QHP_VIRTUAL_FOLDER tag specifies the namespace to use when generating Qt
-# Help Project output. For more information please see Qt Help Project / Virtual
-# Folders (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#virtual-
-# folders).
-# The default value is: doc.
-# This tag requires that the tag GENERATE_QHP is set to YES.
-
-QHP_VIRTUAL_FOLDER     = doc
-
-# If the QHP_CUST_FILTER_NAME tag is set, it specifies the name of a custom
-# filter to add. For more information please see Qt Help Project / Custom
-# Filters (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#custom-
-# filters).
-# This tag requires that the tag GENERATE_QHP is set to YES.
-
-QHP_CUST_FILTER_NAME   =
-
-# The QHP_CUST_FILTER_ATTRS tag specifies the list of the attributes of the
-# custom filter to add. For more information please see Qt Help Project / Custom
-# Filters (see: http://qt-project.org/doc/qt-4.8/qthelpproject.html#custom-
-# filters).
-# This tag requires that the tag GENERATE_QHP is set to YES.
-
-QHP_CUST_FILTER_ATTRS  =
-
-# The QHP_SECT_FILTER_ATTRS tag specifies the list of the attributes this
-# project's filter section matches. Qt Help Project / Filter Attributes (see:
-# http://qt-project.org/doc/qt-4.8/qthelpproject.html#filter-attributes).
-# This tag requires that the tag GENERATE_QHP is set to YES.
-
-QHP_SECT_FILTER_ATTRS  =
-
-# The QHG_LOCATION tag can be used to specify the location of Qt's
-# qhelpgenerator. If non-empty doxygen will try to run qhelpgenerator on the
-# generated .qhp file.
-# This tag requires that the tag GENERATE_QHP is set to YES.
-
-QHG_LOCATION           =
-
-# If the GENERATE_ECLIPSEHELP tag is set to YES, additional index files will be
-# generated, together with the HTML files, they form an Eclipse help plugin. To
-# install this plugin and make it available under the help contents menu in
-# Eclipse, the contents of the directory containing the HTML and XML files needs
-# to be copied into the plugins directory of eclipse. The name of the directory
-# within the plugins directory should be the same as the ECLIPSE_DOC_ID value.
-# After copying Eclipse needs to be restarted before the help appears.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-GENERATE_ECLIPSEHELP   = NO
-
-# A unique identifier for the Eclipse help plugin. When installing the plugin
-# the directory name containing the HTML and XML files should also have this
-# name. Each documentation set should have its own identifier.
-# The default value is: org.doxygen.Project.
-# This tag requires that the tag GENERATE_ECLIPSEHELP is set to YES.
-
-ECLIPSE_DOC_ID         = org.doxygen.Project
-
-# If you want full control over the layout of the generated HTML pages it might
-# be necessary to disable the index and replace it with your own. The
-# DISABLE_INDEX tag can be used to turn on/off the condensed index (tabs) at top
-# of each HTML page. A value of NO enables the index and the value YES disables
-# it. Since the tabs in the index contain the same information as the navigation
-# tree, you can set this option to YES if you also set GENERATE_TREEVIEW to YES.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-DISABLE_INDEX          = NO
-
-# The GENERATE_TREEVIEW tag is used to specify whether a tree-like index
-# structure should be generated to display hierarchical information. If the tag
-# value is set to YES, a side panel will be generated containing a tree-like
-# index structure (just like the one that is generated for HTML Help). For this
-# to work a browser that supports JavaScript, DHTML, CSS and frames is required
-# (i.e. any modern browser). Windows users are probably better off using the
-# HTML help feature. Via custom style sheets (see HTML_EXTRA_STYLESHEET) one can
-# further fine-tune the look of the index. As an example, the default style
-# sheet generated by doxygen has an example that shows how to put an image at
-# the root of the tree instead of the PROJECT_NAME. Since the tree basically has
-# the same information as the tab index, you could consider setting
-# DISABLE_INDEX to YES when enabling this option.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-GENERATE_TREEVIEW      = YES
-
-# The ENUM_VALUES_PER_LINE tag can be used to set the number of enum values that
-# doxygen will group on one line in the generated HTML documentation.
-#
-# Note that a value of 0 will completely suppress the enum values from appearing
-# in the overview section.
-# Minimum value: 0, maximum value: 20, default value: 4.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-ENUM_VALUES_PER_LINE   = 4
-
-# If the treeview is enabled (see GENERATE_TREEVIEW) then this tag can be used
-# to set the initial width (in pixels) of the frame in which the tree is shown.
-# Minimum value: 0, maximum value: 1500, default value: 250.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-TREEVIEW_WIDTH         = 250
-
-# If the EXT_LINKS_IN_WINDOW option is set to YES, doxygen will open links to
-# external symbols imported via tag files in a separate window.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-EXT_LINKS_IN_WINDOW    = NO
-
-# Use this tag to change the font size of LaTeX formulas included as images in
-# the HTML documentation. When you change the font size after a successful
-# doxygen run you need to manually remove any form_*.png images from the HTML
-# output directory to force them to be regenerated.
-# Minimum value: 8, maximum value: 50, default value: 10.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-FORMULA_FONTSIZE       = 10
-
-# Use the FORMULA_TRANPARENT tag to determine whether or not the images
-# generated for formulas are transparent PNGs. Transparent PNGs are not
-# supported properly for IE 6.0, but are supported on all modern browsers.
-#
-# Note that when changing this option you need to delete any form_*.png files in
-# the HTML output directory before the changes have effect.
-# The default value is: YES.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-FORMULA_TRANSPARENT    = YES
-
-# Enable the USE_MATHJAX option to render LaTeX formulas using MathJax (see
-# http://www.mathjax.org) which uses client side Javascript for the rendering
-# instead of using pre-rendered bitmaps. Use this if you do not have LaTeX
-# installed or if you want to formulas look prettier in the HTML output. When
-# enabled you may also need to install MathJax separately and configure the path
-# to it using the MATHJAX_RELPATH option.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-USE_MATHJAX            = NO
-
-# When MathJax is enabled you can set the default output format to be used for
-# the MathJax output. See the MathJax site (see:
-# http://docs.mathjax.org/en/latest/output.html) for more details.
-# Possible values are: HTML-CSS (which is slower, but has the best
-# compatibility), NativeMML (i.e. MathML) and SVG.
-# The default value is: HTML-CSS.
-# This tag requires that the tag USE_MATHJAX is set to YES.
-
-MATHJAX_FORMAT         = HTML-CSS
-
-# When MathJax is enabled you need to specify the location relative to the HTML
-# output directory using the MATHJAX_RELPATH option. The destination directory
-# should contain the MathJax.js script. For instance, if the mathjax directory
-# is located at the same level as the HTML output directory, then
-# MATHJAX_RELPATH should be ../mathjax. The default value points to the MathJax
-# Content Delivery Network so you can quickly see the result without installing
-# MathJax. However, it is strongly recommended to install a local copy of
-# MathJax from http://www.mathjax.org before deployment.
-# The default value is: http://cdn.mathjax.org/mathjax/latest.
-# This tag requires that the tag USE_MATHJAX is set to YES.
-
-MATHJAX_RELPATH        = http://cdn.mathjax.org/mathjax/latest
-
-# The MATHJAX_EXTENSIONS tag can be used to specify one or more MathJax
-# extension names that should be enabled during MathJax rendering. For example
-# MATHJAX_EXTENSIONS = TeX/AMSmath TeX/AMSsymbols
-# This tag requires that the tag USE_MATHJAX is set to YES.
-
-MATHJAX_EXTENSIONS     =
-
-# The MATHJAX_CODEFILE tag can be used to specify a file with javascript pieces
-# of code that will be used on startup of the MathJax code. See the MathJax site
-# (see: http://docs.mathjax.org/en/latest/output.html) for more details. For an
-# example see the documentation.
-# This tag requires that the tag USE_MATHJAX is set to YES.
-
-MATHJAX_CODEFILE       =
-
-# When the SEARCHENGINE tag is enabled doxygen will generate a search box for
-# the HTML output. The underlying search engine uses javascript and DHTML and
-# should work on any modern browser. Note that when using HTML help
-# (GENERATE_HTMLHELP), Qt help (GENERATE_QHP), or docsets (GENERATE_DOCSET)
-# there is already a search function so this one should typically be disabled.
-# For large projects the javascript based search engine can be slow, then
-# enabling SERVER_BASED_SEARCH may provide a better solution. It is possible to
-# search using the keyboard; to jump to the search box use <access key> + S
-# (what the <access key> is depends on the OS and browser, but it is typically
-# <CTRL>, <ALT>/<option>, or both). Inside the search box use the <cursor down
-# key> to jump into the search results window, the results can be navigated
-# using the <cursor keys>. Press <Enter> to select an item or <escape> to cancel
-# the search. The filter options can be selected when the cursor is inside the
-# search box by pressing <Shift>+<cursor down>. Also here use the <cursor keys>
-# to select a filter and <Enter> or <escape> to activate or cancel the filter
-# option.
-# The default value is: YES.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-SEARCHENGINE           = YES
-
-# When the SERVER_BASED_SEARCH tag is enabled the search engine will be
-# implemented using a web server instead of a web client using Javascript. There
-# are two flavors of web server based searching depending on the EXTERNAL_SEARCH
-# setting. When disabled, doxygen will generate a PHP script for searching and
-# an index file used by the script. When EXTERNAL_SEARCH is enabled the indexing
-# and searching needs to be provided by external tools. See the section
-# "External Indexing and Searching" for details.
-# The default value is: NO.
-# This tag requires that the tag SEARCHENGINE is set to YES.
-
-SERVER_BASED_SEARCH    = NO
-
-# When EXTERNAL_SEARCH tag is enabled doxygen will no longer generate the PHP
-# script for searching. Instead the search results are written to an XML file
-# which needs to be processed by an external indexer. Doxygen will invoke an
-# external search engine pointed to by the SEARCHENGINE_URL option to obtain the
-# search results.
-#
-# Doxygen ships with an example indexer (doxyindexer) and search engine
-# (doxysearch.cgi) which are based on the open source search engine library
-# Xapian (see: http://xapian.org/).
-#
-# See the section "External Indexing and Searching" for details.
-# The default value is: NO.
-# This tag requires that the tag SEARCHENGINE is set to YES.
-
-EXTERNAL_SEARCH        = NO
-
-# The SEARCHENGINE_URL should point to a search engine hosted by a web server
-# which will return the search results when EXTERNAL_SEARCH is enabled.
-#
-# Doxygen ships with an example indexer (doxyindexer) and search engine
-# (doxysearch.cgi) which are based on the open source search engine library
-# Xapian (see: http://xapian.org/). See the section "External Indexing and
-# Searching" for details.
-# This tag requires that the tag SEARCHENGINE is set to YES.
-
-SEARCHENGINE_URL       =
-
-# When SERVER_BASED_SEARCH and EXTERNAL_SEARCH are both enabled the unindexed
-# search data is written to a file for indexing by an external tool. With the
-# SEARCHDATA_FILE tag the name of this file can be specified.
-# The default file is: searchdata.xml.
-# This tag requires that the tag SEARCHENGINE is set to YES.
-
-SEARCHDATA_FILE        = searchdata.xml
-
-# When SERVER_BASED_SEARCH and EXTERNAL_SEARCH are both enabled the
-# EXTERNAL_SEARCH_ID tag can be used as an identifier for the project. This is
-# useful in combination with EXTRA_SEARCH_MAPPINGS to search through multiple
-# projects and redirect the results back to the right project.
-# This tag requires that the tag SEARCHENGINE is set to YES.
-
-EXTERNAL_SEARCH_ID     =
-
-# The EXTRA_SEARCH_MAPPINGS tag can be used to enable searching through doxygen
-# projects other than the one defined by this configuration file, but that are
-# all added to the same external search index. Each project needs to have a
-# unique id set via EXTERNAL_SEARCH_ID. The search mapping then maps the id of
-# to a relative location where the documentation can be found. The format is:
-# EXTRA_SEARCH_MAPPINGS = tagname1=loc1 tagname2=loc2 ...
-# This tag requires that the tag SEARCHENGINE is set to YES.
-
-EXTRA_SEARCH_MAPPINGS  =
-
-#---------------------------------------------------------------------------
-# Configuration options related to the LaTeX output
-#---------------------------------------------------------------------------
-
-# If the GENERATE_LATEX tag is set to YES, doxygen will generate LaTeX output.
-# The default value is: YES.
-
-GENERATE_LATEX         = NO
-
-# The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put. If a
-# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
-# it.
-# The default directory is: latex.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_OUTPUT           = latex
-
-# The LATEX_CMD_NAME tag can be used to specify the LaTeX command name to be
-# invoked.
-#
-# Note that when enabling USE_PDFLATEX this option is only used for generating
-# bitmaps for formulas in the HTML output, but not in the Makefile that is
-# written to the output directory.
-# The default file is: latex.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_CMD_NAME         = latex
-
-# The MAKEINDEX_CMD_NAME tag can be used to specify the command name to generate
-# index for LaTeX.
-# The default file is: makeindex.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-MAKEINDEX_CMD_NAME     = makeindex
-
-# If the COMPACT_LATEX tag is set to YES, doxygen generates more compact LaTeX
-# documents. This may be useful for small projects and may help to save some
-# trees in general.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-COMPACT_LATEX          = NO
-
-# The PAPER_TYPE tag can be used to set the paper type that is used by the
-# printer.
-# Possible values are: a4 (210 x 297 mm), letter (8.5 x 11 inches), legal (8.5 x
-# 14 inches) and executive (7.25 x 10.5 inches).
-# The default value is: a4.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-PAPER_TYPE             = a4wide
-
-# The EXTRA_PACKAGES tag can be used to specify one or more LaTeX package names
-# that should be included in the LaTeX output. The package can be specified just
-# by its name or with the correct syntax as to be used with the LaTeX
-# \usepackage command. To get the times font for instance you can specify :
-# EXTRA_PACKAGES=times or EXTRA_PACKAGES={times}
-# To use the option intlimits with the amsmath package you can specify:
-# EXTRA_PACKAGES=[intlimits]{amsmath}
-# If left blank no extra packages will be included.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-EXTRA_PACKAGES         =
-
-# The LATEX_HEADER tag can be used to specify a personal LaTeX header for the
-# generated LaTeX document. The header should contain everything until the first
-# chapter. If it is left blank doxygen will generate a standard header. See
-# section "Doxygen usage" for information on how to let doxygen write the
-# default header to a separate file.
-#
-# Note: Only use a user-defined header if you know what you are doing! The
-# following commands have a special meaning inside the header: $title,
-# $datetime, $date, $doxygenversion, $projectname, $projectnumber,
-# $projectbrief, $projectlogo. Doxygen will replace $title with the empty
-# string, for the replacement values of the other commands the user is referred
-# to HTML_HEADER.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_HEADER           =
-
-# The LATEX_FOOTER tag can be used to specify a personal LaTeX footer for the
-# generated LaTeX document. The footer should contain everything after the last
-# chapter. If it is left blank doxygen will generate a standard footer. See
-# LATEX_HEADER for more information on how to generate a default footer and what
-# special commands can be used inside the footer.
-#
-# Note: Only use a user-defined footer if you know what you are doing!
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_FOOTER           =
-
-# The LATEX_EXTRA_STYLESHEET tag can be used to specify additional user-defined
-# LaTeX style sheets that are included after the standard style sheets created
-# by doxygen. Using this option one can overrule certain style aspects. Doxygen
-# will copy the style sheet files to the output directory.
-# Note: The order of the extra style sheet files is of importance (e.g. the last
-# style sheet in the list overrules the setting of the previous ones in the
-# list).
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_EXTRA_STYLESHEET =
-
-# The LATEX_EXTRA_FILES tag can be used to specify one or more extra images or
-# other source files which should be copied to the LATEX_OUTPUT output
-# directory. Note that the files will be copied as-is; there are no commands or
-# markers available.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_EXTRA_FILES      =
-
-# If the PDF_HYPERLINKS tag is set to YES, the LaTeX that is generated is
-# prepared for conversion to PDF (using ps2pdf or pdflatex). The PDF file will
-# contain links (just like the HTML output) instead of page references. This
-# makes the output suitable for online browsing using a PDF viewer.
-# The default value is: YES.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-PDF_HYPERLINKS         = NO
-
-# If the USE_PDFLATEX tag is set to YES, doxygen will use pdflatex to generate
-# the PDF file directly from the LaTeX files. Set this option to YES, to get a
-# higher quality PDF documentation.
-# The default value is: YES.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-USE_PDFLATEX           = NO
-
-# If the LATEX_BATCHMODE tag is set to YES, doxygen will add the \batchmode
-# command to the generated LaTeX files. This will instruct LaTeX to keep running
-# if errors occur, instead of asking the user for help. This option is also used
-# when generating formulas in HTML.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_BATCHMODE        = NO
-
-# If the LATEX_HIDE_INDICES tag is set to YES then doxygen will not include the
-# index chapters (such as File Index, Compound Index, etc.) in the output.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_HIDE_INDICES     = NO
-
-# If the LATEX_SOURCE_CODE tag is set to YES then doxygen will include source
-# code with syntax highlighting in the LaTeX output.
-#
-# Note that which sources are shown also depends on other settings such as
-# SOURCE_BROWSER.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_SOURCE_CODE      = NO
-
-# The LATEX_BIB_STYLE tag can be used to specify the style to use for the
-# bibliography, e.g. plainnat, or ieeetr. See
-# http://en.wikipedia.org/wiki/BibTeX and \cite for more info.
-# The default value is: plain.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_BIB_STYLE        = plain
-
-# If the LATEX_TIMESTAMP tag is set to YES then the footer of each generated
-# page will contain the date and time when the page was generated. Setting this
-# to NO can help when comparing the output of multiple runs.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_TIMESTAMP        = NO
-
-#---------------------------------------------------------------------------
-# Configuration options related to the RTF output
-#---------------------------------------------------------------------------
-
-# If the GENERATE_RTF tag is set to YES, doxygen will generate RTF output. The
-# RTF output is optimized for Word 97 and may not look too pretty with other RTF
-# readers/editors.
-# The default value is: NO.
-
-GENERATE_RTF           = NO
-
-# The RTF_OUTPUT tag is used to specify where the RTF docs will be put. If a
-# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
-# it.
-# The default directory is: rtf.
-# This tag requires that the tag GENERATE_RTF is set to YES.
-
-RTF_OUTPUT             = rtf
-
-# If the COMPACT_RTF tag is set to YES, doxygen generates more compact RTF
-# documents. This may be useful for small projects and may help to save some
-# trees in general.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_RTF is set to YES.
-
-COMPACT_RTF            = NO
-
-# If the RTF_HYPERLINKS tag is set to YES, the RTF that is generated will
-# contain hyperlink fields. The RTF file will contain links (just like the HTML
-# output) instead of page references. This makes the output suitable for online
-# browsing using Word or some other Word compatible readers that support those
-# fields.
-#
-# Note: WordPad (write) and others do not support links.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_RTF is set to YES.
-
-RTF_HYPERLINKS         = NO
-
-# Load stylesheet definitions from file. Syntax is similar to doxygen's config
-# file, i.e. a series of assignments. You only have to provide replacements,
-# missing definitions are set to their default value.
-#
-# See also section "Doxygen usage" for information on how to generate the
-# default style sheet that doxygen normally uses.
-# This tag requires that the tag GENERATE_RTF is set to YES.
-
-RTF_STYLESHEET_FILE    =
-
-# Set optional variables used in the generation of an RTF document. Syntax is
-# similar to doxygen's config file. A template extensions file can be generated
-# using doxygen -e rtf extensionFile.
-# This tag requires that the tag GENERATE_RTF is set to YES.
-
-RTF_EXTENSIONS_FILE    =
-
-# If the RTF_SOURCE_CODE tag is set to YES then doxygen will include source code
-# with syntax highlighting in the RTF output.
-#
-# Note that which sources are shown also depends on other settings such as
-# SOURCE_BROWSER.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_RTF is set to YES.
-
-RTF_SOURCE_CODE        = NO
-
-#---------------------------------------------------------------------------
-# Configuration options related to the man page output
-#---------------------------------------------------------------------------
-
-# If the GENERATE_MAN tag is set to YES, doxygen will generate man pages for
-# classes and files.
-# The default value is: NO.
-
-GENERATE_MAN           = NO
-
-# The MAN_OUTPUT tag is used to specify where the man pages will be put. If a
-# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
-# it. A directory man3 will be created inside the directory specified by
-# MAN_OUTPUT.
-# The default directory is: man.
-# This tag requires that the tag GENERATE_MAN is set to YES.
-
-MAN_OUTPUT             = man
-
-# The MAN_EXTENSION tag determines the extension that is added to the generated
-# man pages. In case the manual section does not start with a number, the number
-# 3 is prepended. The dot (.) at the beginning of the MAN_EXTENSION tag is
-# optional.
-# The default value is: .3.
-# This tag requires that the tag GENERATE_MAN is set to YES.
-
-MAN_EXTENSION          = .3
-
-# The MAN_SUBDIR tag determines the name of the directory created within
-# MAN_OUTPUT in which the man pages are placed. If defaults to man followed by
-# MAN_EXTENSION with the initial . removed.
-# This tag requires that the tag GENERATE_MAN is set to YES.
-
-MAN_SUBDIR             =
-
-# If the MAN_LINKS tag is set to YES and doxygen generates man output, then it
-# will generate one additional man file for each entity documented in the real
-# man page(s). These additional files only source the real man page, but without
-# them the man command would be unable to find the correct page.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_MAN is set to YES.
-
-MAN_LINKS              = NO
-
-#---------------------------------------------------------------------------
-# Configuration options related to the XML output
-#---------------------------------------------------------------------------
-
-# If the GENERATE_XML tag is set to YES, doxygen will generate an XML file that
-# captures the structure of the code including all documentation.
-# The default value is: NO.
-
-GENERATE_XML           = NO
-
-# The XML_OUTPUT tag is used to specify where the XML pages will be put. If a
-# relative path is entered the value of OUTPUT_DIRECTORY will be put in front of
-# it.
-# The default directory is: xml.
-# This tag requires that the tag GENERATE_XML is set to YES.
-
-XML_OUTPUT             = xml
-
-# If the XML_PROGRAMLISTING tag is set to YES, doxygen will dump the program
-# listings (including syntax highlighting and cross-referencing information) to
-# the XML output. Note that enabling this will significantly increase the size
-# of the XML output.
-# The default value is: YES.
-# This tag requires that the tag GENERATE_XML is set to YES.
-
-XML_PROGRAMLISTING     = YES
-
-#---------------------------------------------------------------------------
-# Configuration options related to the DOCBOOK output
-#---------------------------------------------------------------------------
-
-# If the GENERATE_DOCBOOK tag is set to YES, doxygen will generate Docbook files
-# that can be used to generate PDF.
-# The default value is: NO.
-
-GENERATE_DOCBOOK       = NO
-
-# The DOCBOOK_OUTPUT tag is used to specify where the Docbook pages will be put.
-# If a relative path is entered the value of OUTPUT_DIRECTORY will be put in
-# front of it.
-# The default directory is: docbook.
-# This tag requires that the tag GENERATE_DOCBOOK is set to YES.
-
-DOCBOOK_OUTPUT         = docbook
-
-# If the DOCBOOK_PROGRAMLISTING tag is set to YES, doxygen will include the
-# program listings (including syntax highlighting and cross-referencing
-# information) to the DOCBOOK output. Note that enabling this will significantly
-# increase the size of the DOCBOOK output.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_DOCBOOK is set to YES.
-
-DOCBOOK_PROGRAMLISTING = NO
-
-#---------------------------------------------------------------------------
-# Configuration options for the AutoGen Definitions output
-#---------------------------------------------------------------------------
-
-# If the GENERATE_AUTOGEN_DEF tag is set to YES, doxygen will generate an
-# AutoGen Definitions (see http://autogen.sf.net) file that captures the
-# structure of the code including all documentation. Note that this feature is
-# still experimental and incomplete at the moment.
-# The default value is: NO.
-
-GENERATE_AUTOGEN_DEF   = NO
-
-#---------------------------------------------------------------------------
-# Configuration options related to the Perl module output
-#---------------------------------------------------------------------------
-
-# If the GENERATE_PERLMOD tag is set to YES, doxygen will generate a Perl module
-# file that captures the structure of the code including all documentation.
-#
-# Note that this feature is still experimental and incomplete at the moment.
-# The default value is: NO.
-
-GENERATE_PERLMOD       = NO
-
-# If the PERLMOD_LATEX tag is set to YES, doxygen will generate the necessary
-# Makefile rules, Perl scripts and LaTeX code to be able to generate PDF and DVI
-# output from the Perl module output.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_PERLMOD is set to YES.
-
-PERLMOD_LATEX          = NO
-
-# If the PERLMOD_PRETTY tag is set to YES, the Perl module output will be nicely
-# formatted so it can be parsed by a human reader. This is useful if you want to
-# understand what is going on. On the other hand, if this tag is set to NO, the
-# size of the Perl module output will be much smaller and Perl will parse it
-# just the same.
-# The default value is: YES.
-# This tag requires that the tag GENERATE_PERLMOD is set to YES.
-
-PERLMOD_PRETTY         = YES
-
-# The names of the make variables in the generated doxyrules.make file are
-# prefixed with the string contained in PERLMOD_MAKEVAR_PREFIX. This is useful
-# so different doxyrules.make files included by the same Makefile don't
-# overwrite each other's variables.
-# This tag requires that the tag GENERATE_PERLMOD is set to YES.
-
-PERLMOD_MAKEVAR_PREFIX =
-
-#---------------------------------------------------------------------------
-# Configuration options related to the preprocessor
-#---------------------------------------------------------------------------
-
-# If the ENABLE_PREPROCESSING tag is set to YES, doxygen will evaluate all
-# C-preprocessor directives found in the sources and include files.
-# The default value is: YES.
-
-ENABLE_PREPROCESSING   = YES
-
-# If the MACRO_EXPANSION tag is set to YES, doxygen will expand all macro names
-# in the source code. If set to NO, only conditional compilation will be
-# performed. Macro expansion can be done in a controlled way by setting
-# EXPAND_ONLY_PREDEF to YES.
-# The default value is: NO.
-# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
-
-MACRO_EXPANSION        = YES
-
-# If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES then
-# the macro expansion is limited to the macros specified with the PREDEFINED and
-# EXPAND_AS_DEFINED tags.
-# The default value is: NO.
-# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
-
-EXPAND_ONLY_PREDEF     = NO
-
-# If the SEARCH_INCLUDES tag is set to YES, the include files in the
-# INCLUDE_PATH will be searched if a #include is found.
-# The default value is: YES.
-# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
-
-SEARCH_INCLUDES        = YES
-
-# The INCLUDE_PATH tag can be used to specify one or more directories that
-# contain include files that are not input files but should be processed by the
-# preprocessor.
-# This tag requires that the tag SEARCH_INCLUDES is set to YES.
-
-INCLUDE_PATH           = ../../src/include
-
-# You can use the INCLUDE_FILE_PATTERNS tag to specify one or more wildcard
-# patterns (like *.h and *.hpp) to filter out the header-files in the
-# directories. If left blank, the patterns specified with FILE_PATTERNS will be
-# used.
-# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
-
-INCLUDE_FILE_PATTERNS  = *.h
-
-# The PREDEFINED tag can be used to specify one or more macro names that are
-# defined before the preprocessor is started (similar to the -D option of e.g.
-# gcc). The argument of the tag is a list of macros of the form: name or
-# name=definition (no spaces). If the definition and the "=" are omitted, "=1"
-# is assumed. To prevent a macro definition from being undefined via #undef or
-# recursively expanded use the := operator instead of the = operator.
-# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
-
-PREDEFINED             = __DOXYGEN__=1 \
-                         NO_SYS=0 \
-                         SYS_LIGHTWEIGHT_PROT=1 \
-                         LWIP_TCPIP_CORE_LOCKING=1 \
-                         LWIP_IPV4=1 \
-                         LWIP_IPV6=1 \
-                         LWIP_ICMP=1 \
-                         LWIP_RAW=1 \
-                         LWIP_DHCP=1 \
-                         LWIP_IPV6_DHCP6=1 \
-                         LWIP_UDPLITE=1 \
-                         LWIP_UDP=1 \
-                         LWIP_IGMP=1 \
-                         LWIP_TCP=1 \
-                         LWIP_ALTCP=1 \
-                         LWIP_ALTCP_TLS=1 \
-                         LWIP_IPV6_SCOPES=1 \
-                         TCP_LISTEN_BACKLOG=1 \
-                         LWIP_SNMP=1 \
-                         SNMP_USE_NETCONN=1 \
-                         SNMP_USE_RAW=1 \
-                         MIB2_STATS=1 \
-                         LWIP_MDNS_RESPONDER=1 \
-                         HTTPD_ENABLE_HTTPS=1 \
-                         LWIP_HTTPD_CGI=1 \
-                         LWIP_HTTPD_SSI=1 \
-                         LWIP_HTTPD_SSI_RAW=1 \
-                         LWIP_HTTPD_SUPPORT_POST=1 \
-                         LWIP_HTTPD_POST_MANUAL_WND=1 \
-                         MEMP_OVERFLOW_CHECK=0 \
-                         MEMP_SANITY_CHECK=1 \
-                         LWIP_ARP=1 \
-                         LWIP_HAVE_LOOPIF=1 \
-                         LWIP_NETIF_HOSTNAME=1 \
-                         LWIP_NETIF_API=1 \
-                         LWIP_NETIF_CALLBACK=1 \
-                         LWIP_NETIF_STATUS_CALLBACK=1 \
-                         LWIP_NETIF_REMOVE_CALLBACK=1 \
-                         LWIP_NETIF_LINK_CALLBACK=1 \
-                         LWIP_NETIF_EXT_STATUS_CALLBACK=1 \
-                         LWIP_NUM_NETIF_CLIENT_DATA=1 \
-                         ENABLE_LOOPBACK=1 \
-                         LWIP_AUTOIP=1 \
-                         ARP_QUEUEING=1 \
-                         LWIP_STATS=1 \
-                         MEM_USE_POOLS=0 \
-                         LWIP_DNS=1 \
-                         LWIP_SOCKET=1 \
-                         LWIP_NETCONN=1 \
-                         IP_SOF_BROADCAST=1 \
-                         IP_SOF_BROADCAST_RECV=1 \
-                         LWIP_NETIF_API=1 \
-                         LWIP_SO_SNDTIMEO=1 \
-                         LWIP_SO_RCVBUF=1 \
-                         LWIP_SO_LINGER=1 \
-                         SO_REUSE=1 \
-                         SO_REUSE_RXTOALL=1 \
-                         LWIP_HAVE_SLIPIF=1 \
-                         SLIP_RX_FROM_ISR=1 \
-                         LWIP_TCP_PCB_NUM_EXT_ARGS=1
-
-# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this
-# tag can be used to specify a list of macro names that should be expanded. The
-# macro definition that is found in the sources will be used. Use the PREDEFINED
-# tag if you want to use a different macro definition that overrules the
-# definition found in the source code.
-# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
-
-EXPAND_AS_DEFINED      =
-
-# If the SKIP_FUNCTION_MACROS tag is set to YES then doxygen's preprocessor will
-# remove all references to function-like macros that are alone on a line, have
-# an all uppercase name, and do not end with a semicolon. Such function macros
-# are typically used for boiler-plate code, and will confuse the parser if not
-# removed.
-# The default value is: YES.
-# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
-
-SKIP_FUNCTION_MACROS   = NO
-
-#---------------------------------------------------------------------------
-# Configuration options related to external references
-#---------------------------------------------------------------------------
-
-# The TAGFILES tag can be used to specify one or more tag files. For each tag
-# file the location of the external documentation should be added. The format of
-# a tag file without this location is as follows:
-# TAGFILES = file1 file2 ...
-# Adding location for the tag files is done as follows:
-# TAGFILES = file1=loc1 "file2 = loc2" ...
-# where loc1 and loc2 can be relative or absolute paths or URLs. See the
-# section "Linking to external documentation" for more information about the use
-# of tag files.
-# Note: Each tag file must have a unique name (where the name does NOT include
-# the path). If a tag file is not located in the directory in which doxygen is
-# run, you must also specify the path to the tagfile here.
-
-TAGFILES               =
-
-# When a file name is specified after GENERATE_TAGFILE, doxygen will create a
-# tag file that is based on the input files it reads. See section "Linking to
-# external documentation" for more information about the usage of tag files.
-
-GENERATE_TAGFILE       =
-
-# If the ALLEXTERNALS tag is set to YES, all external class will be listed in
-# the class index. If set to NO, only the inherited external classes will be
-# listed.
-# The default value is: NO.
-
-ALLEXTERNALS           = NO
-
-# If the EXTERNAL_GROUPS tag is set to YES, all external groups will be listed
-# in the modules index. If set to NO, only the current project's groups will be
-# listed.
-# The default value is: YES.
-
-EXTERNAL_GROUPS        = YES
-
-# If the EXTERNAL_PAGES tag is set to YES, all external pages will be listed in
-# the related pages index. If set to NO, only the current project's pages will
-# be listed.
-# The default value is: YES.
-
-EXTERNAL_PAGES         = YES
-
-# The PERL_PATH should be the absolute path and name of the perl script
-# interpreter (i.e. the result of 'which perl').
-# The default file (with absolute path) is: /usr/bin/perl.
-
-PERL_PATH              = /usr/bin/perl
-
-#---------------------------------------------------------------------------
-# Configuration options related to the dot tool
-#---------------------------------------------------------------------------
-
-# If the CLASS_DIAGRAMS tag is set to YES, doxygen will generate a class diagram
-# (in HTML and LaTeX) for classes with base or super classes. Setting the tag to
-# NO turns the diagrams off. Note that this option also works with HAVE_DOT
-# disabled, but it is recommended to install and use dot, since it yields more
-# powerful graphs.
-# The default value is: YES.
-
-CLASS_DIAGRAMS         = YES
-
-# You can define message sequence charts within doxygen comments using the \msc
-# command. Doxygen will then run the mscgen tool (see:
-# http://www.mcternan.me.uk/mscgen/)) to produce the chart and insert it in the
-# documentation. The MSCGEN_PATH tag allows you to specify the directory where
-# the mscgen tool resides. If left empty the tool is assumed to be found in the
-# default search path.
-
-MSCGEN_PATH            =
-
-# You can include diagrams made with dia in doxygen documentation. Doxygen will
-# then run dia to produce the diagram and insert it in the documentation. The
-# DIA_PATH tag allows you to specify the directory where the dia binary resides.
-# If left empty dia is assumed to be found in the default search path.
-
-DIA_PATH               =
-
-# If set to YES the inheritance and collaboration graphs will hide inheritance
-# and usage relations if the target is undocumented or is not a class.
-# The default value is: YES.
-
-HIDE_UNDOC_RELATIONS   = YES
-
-# If you set the HAVE_DOT tag to YES then doxygen will assume the dot tool is
-# available from the path. This tool is part of Graphviz (see:
-# http://www.graphviz.org/), a graph visualization toolkit from AT&T and Lucent
-# Bell Labs. The other options in this section have no effect if this option is
-# set to NO
-# The default value is: NO.
-
-HAVE_DOT               = NO
-
-# The DOT_NUM_THREADS specifies the number of dot invocations doxygen is allowed
-# to run in parallel. When set to 0 doxygen will base this on the number of
-# processors available in the system. You can set it explicitly to a value
-# larger than 0 to get control over the balance between CPU load and processing
-# speed.
-# Minimum value: 0, maximum value: 32, default value: 0.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-DOT_NUM_THREADS        = 0
-
-# When you want a differently looking font in the dot files that doxygen
-# generates you can specify the font name using DOT_FONTNAME. You need to make
-# sure dot is able to find the font, which can be done by putting it in a
-# standard location or by setting the DOTFONTPATH environment variable or by
-# setting DOT_FONTPATH to the directory containing the font.
-# The default value is: Helvetica.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-DOT_FONTNAME           = Helvetica
-
-# The DOT_FONTSIZE tag can be used to set the size (in points) of the font of
-# dot graphs.
-# Minimum value: 4, maximum value: 24, default value: 10.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-DOT_FONTSIZE           = 10
-
-# By default doxygen will tell dot to use the default font as specified with
-# DOT_FONTNAME. If you specify a different font using DOT_FONTNAME you can set
-# the path where dot can find it using this tag.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-DOT_FONTPATH           =
-
-# If the CLASS_GRAPH tag is set to YES then doxygen will generate a graph for
-# each documented class showing the direct and indirect inheritance relations.
-# Setting this tag to YES will force the CLASS_DIAGRAMS tag to NO.
-# The default value is: YES.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-CLASS_GRAPH            = YES
-
-# If the COLLABORATION_GRAPH tag is set to YES then doxygen will generate a
-# graph for each documented class showing the direct and indirect implementation
-# dependencies (inheritance, containment, and class references variables) of the
-# class with other documented classes.
-# The default value is: YES.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-COLLABORATION_GRAPH    = YES
-
-# If the GROUP_GRAPHS tag is set to YES then doxygen will generate a graph for
-# groups, showing the direct groups dependencies.
-# The default value is: YES.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-GROUP_GRAPHS           = YES
-
-# If the UML_LOOK tag is set to YES, doxygen will generate inheritance and
-# collaboration diagrams in a style similar to the OMG's Unified Modeling
-# Language.
-# The default value is: NO.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-UML_LOOK               = NO
-
-# If the UML_LOOK tag is enabled, the fields and methods are shown inside the
-# class node. If there are many fields or methods and many nodes the graph may
-# become too big to be useful. The UML_LIMIT_NUM_FIELDS threshold limits the
-# number of items for each type to make the size more manageable. Set this to 0
-# for no limit. Note that the threshold may be exceeded by 50% before the limit
-# is enforced. So when you set the threshold to 10, up to 15 fields may appear,
-# but if the number exceeds 15, the total amount of fields shown is limited to
-# 10.
-# Minimum value: 0, maximum value: 100, default value: 10.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-UML_LIMIT_NUM_FIELDS   = 10
-
-# If the TEMPLATE_RELATIONS tag is set to YES then the inheritance and
-# collaboration graphs will show the relations between templates and their
-# instances.
-# The default value is: NO.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-TEMPLATE_RELATIONS     = NO
-
-# If the INCLUDE_GRAPH, ENABLE_PREPROCESSING and SEARCH_INCLUDES tags are set to
-# YES then doxygen will generate a graph for each documented file showing the
-# direct and indirect include dependencies of the file with other documented
-# files.
-# The default value is: YES.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-INCLUDE_GRAPH          = YES
-
-# If the INCLUDED_BY_GRAPH, ENABLE_PREPROCESSING and SEARCH_INCLUDES tags are
-# set to YES then doxygen will generate a graph for each documented file showing
-# the direct and indirect include dependencies of the file with other documented
-# files.
-# The default value is: YES.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-INCLUDED_BY_GRAPH      = YES
-
-# If the CALL_GRAPH tag is set to YES then doxygen will generate a call
-# dependency graph for every global function or class method.
-#
-# Note that enabling this option will significantly increase the time of a run.
-# So in most cases it will be better to enable call graphs for selected
-# functions only using the \callgraph command. Disabling a call graph can be
-# accomplished by means of the command \hidecallgraph.
-# The default value is: NO.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-CALL_GRAPH             = NO
-
-# If the CALLER_GRAPH tag is set to YES then doxygen will generate a caller
-# dependency graph for every global function or class method.
-#
-# Note that enabling this option will significantly increase the time of a run.
-# So in most cases it will be better to enable caller graphs for selected
-# functions only using the \callergraph command. Disabling a caller graph can be
-# accomplished by means of the command \hidecallergraph.
-# The default value is: NO.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-CALLER_GRAPH           = NO
-
-# If the GRAPHICAL_HIERARCHY tag is set to YES then doxygen will graphical
-# hierarchy of all classes instead of a textual one.
-# The default value is: YES.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-GRAPHICAL_HIERARCHY    = YES
-
-# If the DIRECTORY_GRAPH tag is set to YES then doxygen will show the
-# dependencies a directory has on other directories in a graphical way. The
-# dependency relations are determined by the #include relations between the
-# files in the directories.
-# The default value is: YES.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-DIRECTORY_GRAPH        = YES
-
-# The DOT_IMAGE_FORMAT tag can be used to set the image format of the images
-# generated by dot. For an explanation of the image formats see the section
-# output formats in the documentation of the dot tool (Graphviz (see:
-# http://www.graphviz.org/)).
-# Note: If you choose svg you need to set HTML_FILE_EXTENSION to xhtml in order
-# to make the SVG files visible in IE 9+ (other browsers do not have this
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diff --git a/components/net/lwip-2.1.0/doc/doxygen/main_page.h b/components/net/lwip-2.1.0/doc/doxygen/main_page.h
deleted file mode 100644
index 89d86f82e9..0000000000
--- a/components/net/lwip-2.1.0/doc/doxygen/main_page.h
+++ /dev/null
@@ -1,403 +0,0 @@
-/**
- * @defgroup lwip lwIP
- *
- * @defgroup infrastructure Infrastructure
- * 
- * @defgroup api APIs
- * lwIP provides three Application Program's Interfaces (APIs) for programs
- * to use for communication with the TCP/IP code:
- * - low-level "core" / "callback" or @ref callbackstyle_api.
- * - higher-level @ref sequential_api.
- * - BSD-style @ref socket.
- * 
- * The raw TCP/IP interface allows the application program to integrate
- * better with the TCP/IP code. Program execution is event based by
- * having callback functions being called from within the TCP/IP
- * code. The TCP/IP code and the application program both run in the same
- * thread. The sequential API has a much higher overhead and is not very
- * well suited for small systems since it forces a multithreaded paradigm
- * on the application.
- * 
- * The raw TCP/IP interface is not only faster in terms of code execution
- * time but is also less memory intensive. The drawback is that program
- * development is somewhat harder and application programs written for
- * the raw TCP/IP interface are more difficult to understand. Still, this
- * is the preferred way of writing applications that should be small in
- * code size and memory usage.
- * 
- * All APIs can be used simultaneously by different application
- * programs. In fact, the sequential API is implemented as an application
- * program using the raw TCP/IP interface.
- * 
- * Do not confuse the lwIP raw API with raw Ethernet or IP sockets.
- * The former is a way of interfacing the lwIP network stack (including
- * TCP and UDP), the latter refers to processing raw Ethernet or IP data
- * instead of TCP connections or UDP packets.
- * 
- * Raw API applications may never block since all packet processing
- * (input and output) as well as timer processing (TCP mainly) is done
- * in a single execution context.
- *
- * @defgroup callbackstyle_api "raw" APIs
- * @ingroup api
- * Non thread-safe APIs, callback style for maximum performance and minimum
- * memory footprint.
- * Program execution is driven by callbacks functions, which are then
- * invoked by the lwIP core when activity related to that application
- * occurs. A particular application may register to be notified via a
- * callback function for events such as incoming data available, outgoing
- * data sent, error notifications, poll timer expiration, connection
- * closed, etc. An application can provide a callback function to perform
- * processing for any or all of these events. Each callback is an ordinary
- * C function that is called from within the TCP/IP code. Every callback
- * function is passed the current TCP or UDP connection state as an
- * argument. Also, in order to be able to keep program specific state,
- * the callback functions are called with a program specified argument
- * that is independent of the TCP/IP state.
- * The raw API (sometimes called native API) is an event-driven API designed
- * to be used without an operating system that implements zero-copy send and
- * receive. This API is also used by the core stack for interaction between
- * the various protocols. It is the only API available when running lwIP
- * without an operating system.
- * 
- * @defgroup sequential_api Sequential-style APIs
- * @ingroup api
- * Sequential-style APIs, blocking functions. More overhead, but can be called
- * from any thread except TCPIP thread.
- * The sequential API provides a way for ordinary, sequential, programs
- * to use the lwIP stack. It is quite similar to the BSD socket API. The
- * model of execution is based on the blocking open-read-write-close
- * paradigm. Since the TCP/IP stack is event based by nature, the TCP/IP
- * code and the application program must reside in different execution
- * contexts (threads).
- * 
- * @defgroup socket Socket API
- * @ingroup api
- * BSD-style socket API.\n
- * Thread-safe, to be called from non-TCPIP threads only.\n
- * Can be activated by defining @ref LWIP_SOCKET to 1.\n
- * Header is in posix/sys/socket.h\n
- * The socket API is a compatibility API for existing applications,
- * currently it is built on top of the sequential API. It is meant to
- * provide all functions needed to run socket API applications running
- * on other platforms (e.g. unix / windows etc.). However, due to limitations
- * in the specification of this API, there might be incompatibilities
- * that require small modifications of existing programs.
- * 
- * @defgroup netifs NETIFs
- * 
- * @defgroup apps Applications
- */
-
-/**
- * @mainpage Overview
- * @verbinclude "README"
- */
-
-/**
- * @page upgrading Upgrading
- * @verbinclude "UPGRADING"
- */
-
-/**
- * @page changelog Changelog
- *
- * 2.1.0
- * -----
- * * Support TLS via new @ref altcp_api connection API (https, smtps, mqtt over TLS)
- * * Switch to cmake as the main build system (Makefile file lists are still
- *   maintained for now)
- * * Improve IPv6 support: support address scopes, support stateless DHCPv6, bugfixes
- * * Add debug helper asserts to ensure threading/locking requirements are met
- * * Add sys_mbox_trypost_fromisr() and tcpip_callbackmsg_trycallback_fromisr()
- *   (for FreeRTOS, mainly)
- * * socket API: support poll(), sendmsg() and recvmsg(); fix problems on close
- * 
- * Detailed Changelog
- * ------------------
- * @verbinclude "CHANGELOG"
- */
-
-/**
- * @page contrib How to contribute to lwIP
- * @verbinclude "contrib.txt"
- */
-
-/**
- * @page pitfalls Common pitfalls
- *
- * Multiple Execution Contexts in lwIP code
- * ========================================
- *
- * The most common source of lwIP problems is to have multiple execution contexts
- * inside the lwIP code.
- * 
- * lwIP can be used in two basic modes: @ref lwip_nosys (no OS/RTOS 
- * running on target system) or @ref lwip_os (there is an OS running
- * on the target system).
- * 
- * See also: @ref multithreading (especially the part about @ref LWIP_ASSERT_CORE_LOCKED()!)
- *
- * Mainloop Mode
- * -------------
- * In mainloop mode, only @ref callbackstyle_api can be used.
- * The user has two possibilities to ensure there is only one 
- * exection context at a time in lwIP:
- *
- * 1) Deliver RX ethernet packets directly in interrupt context to lwIP
- *    by calling netif->input directly in interrupt. This implies all lwIP 
- *    callback functions are called in IRQ context, which may cause further
- *    problems in application code: IRQ is blocked for a long time, multiple
- *    execution contexts in application code etc. When the application wants
- *    to call lwIP, it only needs to disable interrupts during the call.
- *    If timers are involved, even more locking code is needed to lock out
- *    timer IRQ and ethernet IRQ from each other, assuming these may be nested.
- *
- * 2) Run lwIP in a mainloop. There is example code here: @ref lwip_nosys.
- *    lwIP is _ONLY_ called from mainloop callstacks here. The ethernet IRQ
- *    has to put received telegrams into a queue which is polled in the
- *    mainloop. Ensure lwIP is _NEVER_ called from an interrupt, e.g.
- *    some SPI IRQ wants to forward data to udp_send() or tcp_write()!
- *
- * OS Mode
- * -------
- * In OS mode, @ref callbackstyle_api AND @ref sequential_api can be used.
- * @ref sequential_api are designed to be called from threads other than
- * the TCPIP thread, so there is nothing to consider here.
- * But @ref callbackstyle_api functions must _ONLY_ be called from
- * TCPIP thread. It is a common error to call these from other threads
- * or from IRQ contexts. ​Ethernet RX needs to deliver incoming packets
- * in the correct way by sending a message to TCPIP thread, this is
- * implemented in tcpip_input().​​
- * Again, ensure lwIP is _NEVER_ called from an interrupt, e.g.
- * some SPI IRQ wants to forward data to udp_send() or tcp_write()!
- * 
- * 1) tcpip_callback() can be used get called back from TCPIP thread,
- *    it is safe to call any @ref callbackstyle_api from there.
- *
- * 2) Use @ref LWIP_TCPIP_CORE_LOCKING. All @ref callbackstyle_api
- *    functions can be called when lwIP core lock is aquired, see
- *    @ref LOCK_TCPIP_CORE() and @ref UNLOCK_TCPIP_CORE().
- *    These macros cannot be used in an interrupt context!
- *    Note the OS must correctly handle priority inversion for this.
- *
- * Cache / DMA issues
- * ==================
- *
- * DMA-capable ethernet hardware and zero-copy RX
- * ----------------------------------------------
- * 
- * lwIP changes the content of RECEIVED pbufs in the TCP code path.
- * This implies one or more cacheline(s) of the RX pbuf become dirty
- * and need to be flushed before the memory is handed over to the
- * DMA ethernet hardware for the next telegram to be received.
- * See http://lists.nongnu.org/archive/html/lwip-devel/2017-12/msg00070.html
- * for a more detailed explanation.
- * Also keep in mind the user application may also write into pbufs,
- * so it is generally a bug not to flush the data cache before handing
- * a buffer to DMA hardware.
- *
- * DMA-capable ethernet hardware and cacheline alignment
- * -----------------------------------------------------
- * Nice description about DMA capable hardware and buffer handling:
- * http://www.pebblebay.com/a-guide-to-using-direct-memory-access-in-embedded-systems-part-two/
- * Read especially sections "Cache coherency" and "Buffer alignment".
- */
-
-/**
- * @page bugs Reporting bugs
- * Please report bugs in the lwIP bug tracker at savannah.\n
- * BEFORE submitting, please check if the bug has already been reported!\n
- * https://savannah.nongnu.org/bugs/?group=lwip
- */
-
-/**
- * @page zerocopyrx Zero-copy RX
- * The following code is an example for zero-copy RX ethernet driver:
- * @include ZeroCopyRx.c
- */
-
-/**
- * @defgroup lwip_nosys Mainloop mode ("NO_SYS")
- * @ingroup lwip
- * Use this mode if you do not run an OS on your system. \#define NO_SYS to 1.
- * Feed incoming packets to netif->input(pbuf, netif) function from mainloop,
- * *not* *from* *interrupt* *context*. You can allocate a @ref pbuf in interrupt
- * context and put them into a queue which is processed from mainloop.\n
- * Call sys_check_timeouts() periodically in the mainloop.\n
- * Porting: implement all functions in @ref sys_time, @ref sys_prot and 
- * @ref compiler_abstraction.\n
- * You can only use @ref callbackstyle_api in this mode.\n
- * Sample code:\n
- * @include NO_SYS_SampleCode.c
- */
-
-/**
- * @defgroup lwip_os OS mode (TCPIP thread)
- * @ingroup lwip
- * Use this mode if you run an OS on your system. It is recommended to
- * use an RTOS that correctly handles priority inversion and
- * to use @ref LWIP_TCPIP_CORE_LOCKING.\n
- * Porting: implement all functions in @ref sys_layer.\n
- * You can use @ref callbackstyle_api together with @ref tcpip_callback,
- * and all @ref sequential_api.
- */
-
-/**
- * @page sys_init System initalization
-A truly complete and generic sequence for initializing the lwIP stack
-cannot be given because it depends on additional initializations for
-your runtime environment (e.g. timers).
-
-We can give you some idea on how to proceed when using the raw API.
-We assume a configuration using a single Ethernet netif and the
-UDP and TCP transport layers, IPv4 and the DHCP client.
-
-Call these functions in the order of appearance:
-
-- lwip_init(): Initialize the lwIP stack and all of its subsystems.
-
-- netif_add(struct netif *netif, ...):
-  Adds your network interface to the netif_list. Allocate a struct
-  netif and pass a pointer to this structure as the first argument.
-  Give pointers to cleared ip_addr structures when using DHCP,
-  or fill them with sane numbers otherwise. The state pointer may be NULL.
-
-  The init function pointer must point to a initialization function for
-  your Ethernet netif interface. The following code illustrates its use.
-  
-@code{.c}
-  err_t netif_if_init(struct netif *netif)
-  {
-    u8_t i;
-    
-    for (i = 0; i < ETHARP_HWADDR_LEN; i++) {
-      netif->hwaddr[i] = some_eth_addr[i];
-    }
-    init_my_eth_device();
-    return ERR_OK;
-  }
-@endcode
-  
-  For Ethernet drivers, the input function pointer must point to the lwIP
-  function ethernet_input() declared in "netif/etharp.h". Other drivers
-  must use ip_input() declared in "lwip/ip.h".
-  
-- netif_set_default(struct netif *netif)
-  Registers the default network interface.
-
-- netif_set_link_up(struct netif *netif)
-  This is the hardware link state; e.g. whether cable is plugged for wired
-  Ethernet interface. This function must be called even if you don't know
-  the current state. Having link up and link down events is optional but
-  DHCP and IPv6 discover benefit well from those events.
-
-- netif_set_up(struct netif *netif)
-  This is the administrative (= software) state of the netif, when the
-  netif is fully configured this function must be called.
-
-- dhcp_start(struct netif *netif)
-  Creates a new DHCP client for this interface on the first call.
-  You can peek in the netif->dhcp struct for the actual DHCP status.
-
-- sys_check_timeouts()
-  When the system is running, you have to periodically call
-  sys_check_timeouts() which will handle all timers for all protocols in
-  the stack; add this to your main loop or equivalent.
- */
-
-/**
- * @page multithreading Multithreading
- * lwIP started targeting single-threaded environments. When adding multi-
- * threading support, instead of making the core thread-safe, another
- * approach was chosen: there is one main thread running the lwIP core
- * (also known as the "tcpip_thread"). When running in a multithreaded
- * environment, raw API functions MUST only be called from the core thread
- * since raw API functions are not protected from concurrent access (aside
- * from pbuf- and memory management functions). Application threads using
- * the sequential- or socket API communicate with this main thread through
- * message passing.
- * 
- * As such, the list of functions that may be called from
- * other threads or an ISR is very limited! Only functions
- * from these API header files are thread-safe:
- * - api.h
- * - netbuf.h
- * - netdb.h
- * - netifapi.h
- * - pppapi.h
- * - sockets.h
- * - sys.h
- * 
- * Additionaly, memory (de-)allocation functions may be
- * called from multiple threads (not ISR!) with NO_SYS=0
- * since they are protected by @ref SYS_LIGHTWEIGHT_PROT and/or
- * semaphores.
- * 
- * Netconn or Socket API functions are thread safe against the
- * core thread but they are not reentrant at the control block
- * granularity level. That is, a UDP or TCP control block must
- * not be shared among multiple threads without proper locking.
- * 
- * If @ref SYS_LIGHTWEIGHT_PROT is set to 1 and
- * @ref LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT is set to 1,
- * pbuf_free() may also be called from another thread or
- * an ISR (since only then, mem_free - for PBUF_RAM - may
- * be called from an ISR: otherwise, the HEAP is only
- * protected by semaphores).
- * 
- * How to get threading done right
- * -------------------------------
- * 
- * It is strongly recommended to implement the LWIP_ASSERT_CORE_LOCKED()
- * macro in an application that uses multithreading. lwIP code has
- * several places where a check for a correct thread context is
- * implemented which greatly helps the user to get threading done right.
- * See the example sys_arch.c files in unix and Win32 port 
- * in the contrib repository.
- * 
- * In short: Copy the functions sys_mark_tcpip_thread() and 
- * sys_check_core_locking() to your port and modify them to work with your OS.
- * Then let @ref LWIP_ASSERT_CORE_LOCKED() and @ref LWIP_MARK_TCPIP_THREAD()
- * point to these functions.
- * 
- * If you use @ref LWIP_TCPIP_CORE_LOCKING, you also need to copy and adapt
- * the functions sys_lock_tcpip_core() and sys_unlock_tcpip_core().
- * Let @ref LOCK_TCPIP_CORE() and @ref UNLOCK_TCPIP_CORE() point 
- * to these functions. 
- */
-
-/**
- * @page optimization Optimization hints
-The first thing you want to optimize is the lwip_standard_checksum()
-routine from src/core/inet.c. You can override this standard
-function with the \#define LWIP_CHKSUM your_checksum_routine().
-
-There are C examples given in inet.c or you might want to
-craft an assembly function for this. RFC1071 is a good
-introduction to this subject.
-
-Other significant improvements can be made by supplying
-assembly or inline replacements for htons() and htonl()
-if you're using a little-endian architecture.
-\#define lwip_htons(x) your_htons()
-\#define lwip_htonl(x) your_htonl()
-If you \#define them to htons() and htonl(), you should
-\#define LWIP_DONT_PROVIDE_BYTEORDER_FUNCTIONS to prevent lwIP from
-defining htonx / ntohx compatibility macros.
-
-Check your network interface driver if it reads at
-a higher speed than the maximum wire-speed. If the
-hardware isn't serviced frequently and fast enough
-buffer overflows are likely to occur.
-
-E.g. when using the cs8900 driver, call cs8900if_service(ethif)
-as frequently as possible. When using an RTOS let the cs8900 interrupt
-wake a high priority task that services your driver using a binary
-semaphore or event flag. Some drivers might allow additional tuning
-to match your application and network.
-
-For a production release it is recommended to set LWIP_STATS to 0.
-Note that speed performance isn't influenced much by simply setting
-high values to the memory options.
- */
diff --git a/components/net/lwip-2.1.0/doc/doxygen/output/index.html b/components/net/lwip-2.1.0/doc/doxygen/output/index.html
deleted file mode 100644
index a52e09fcf2..0000000000
--- a/components/net/lwip-2.1.0/doc/doxygen/output/index.html
+++ /dev/null
@@ -1,10 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
-<html xmlns="http://www.w3.org/1999/xhtml">
-<head>
-  <title>Redirection</title>
-  <meta http-equiv="refresh" content="0; url=html/index.html" />
-</head>
-<body>
-  <a href="html/index.html">index.html</a>
-</body>
-</html>
diff --git a/components/net/lwip-2.1.0/doc/mdns.txt b/components/net/lwip-2.1.0/doc/mdns.txt
deleted file mode 100644
index 0c28970da6..0000000000
--- a/components/net/lwip-2.1.0/doc/mdns.txt
+++ /dev/null
@@ -1,112 +0,0 @@
-Multicast DNS for lwIP
-
-Author: Erik Ekman
-
-
-Note! The MDNS responder does not have all features required by the standards.
-See notes in src/apps/mdns/mdns.c for what is left. It is however usable in normal
-cases - but watch out if many devices on the same network try to use the same
-host/service instance names.
-
-
-How to enable:
-==============
-
-MDNS support does not depend on DNS.
-MDNS supports using IPv4 only, v6 only, or v4+v6.
-
-To enable MDNS responder, set
-  LWIP_MDNS_RESPONDER = 1
-in lwipopts.h and add src/apps/mdns/mdns.c to your list of files to build.
-
-The max number of services supported per netif is defined by MDNS_MAX_SERVICES,
-default is 1.
-
-Increase MEMP_NUM_UDP_PCB by 1. MDNS needs one PCB.
-Increase LWIP_NUM_NETIF_CLIENT_DATA by 1 (MDNS needs one entry on netif).
-
-MDNS with IPv4 requires LWIP_IGMP = 1, and preferably LWIP_AUTOIP = 1.
-MDNS with IPv6 requires LWIP_IPV6_MLD = 1, and that a link-local address is
-generated.
-
-The MDNS code puts its structs on the stack where suitable to reduce dynamic
-memory allocation. It may use up to 1kB of stack.
-
-MDNS (like other apps) needs a strncasecmp() implementation. If you have one, define
-'lwip_strnicmp' to it. Otherwise the code will provide an implementation
-for you.
-
-
-How to use:
-===========
-
-Call mdns_resp_init() during system initialization.
-This opens UDP sockets on port 5353 for IPv4 and IPv6.
-
-
-To start responding on a netif, run
-  mdns_resp_add_netif(struct netif *netif, char *hostname, u32_t dns_ttl)
-
-The hostname will be copied. If this returns successfully, the netif will join
-the multicast groups and any MDNS/legacy DNS requests sent unicast or multicast
-to port 5353 will be handled:
-- <hostname>.local type A, AAAA or ANY returns relevant IP addresses
-- Reverse lookups (PTR in-addr.arpa, ip6.arpa) of netif addresses
-  returns <hostname>.local
-Answers will use the supplied TTL (in seconds)
-MDNS allows UTF-8 names, but it is recommended to stay within ASCII,
-since the default case-insensitive comparison assumes this.
-
-Call mdns_resp_announce() every time the IP address on the netif has changed.
-
-Call mdns_resp_restart() every time the network interface comes up after being
-down, for example cable connected after being disconnected, administrative 
-interface comes up after being down, or the device wakes up from sleep.
-
-To stop responding on a netif, run
-  mdns_resp_remove_netif(struct netif *netif)
-
-
-Adding services:
-================
-
-The netif first needs to be registered. Then run
-  mdns_resp_add_service(struct netif *netif, char *name, char *service,
-      u16_t proto, u16_t port, u32_t dns_ttl,
-      service_get_txt_fn_t txt_fn, void *txt_userdata);
-
-The name and service pointers will be copied. Name refers to the name of the
-service instance, and service is the type of service, like _http
-proto can be DNSSD_PROTO_UDP or DNSSD_PROTO_TCP which represent _udp and _tcp.
-If this call returns successfully, the following queries will be answered:
-- _services._dns-sd._udp.local type PTR returns <service>.<proto>.local
-- <service>.<proto>.local type PTR returns <name>.<service>.<proto>.local
-- <name>.<service>.<proto>.local type SRV returns hostname and port of service
-- <name>.<service>.<proto>.local type TXT builds text strings by calling txt_fn
-  with the supplied userdata. The callback adds strings to the reply by calling
-  mdns_resp_add_service_txtitem(struct mdns_service *service, char *txt,
-   int txt_len). Example callback method:
-
-   static void srv_txt(struct mdns_service *service, void *txt_userdata)
-   {
-     res = mdns_resp_add_service_txtitem(service, "path=/", 6);
-     LWIP_ERROR("mdns add service txt failed\n", (res == ERR_OK), return);
-   }
-
-  Since a hostname struct is used for TXT storage each single item can be max
-  63 bytes long, and  the total max length (including length bytes for each
-  item) is 255 bytes.
-
-If your device runs a webserver on port 80, an example call might be:
-
-  mdns_resp_add_service(netif, "myweb", "_http"
-      DNSSD_PROTO_TCP, 80, 3600, srv_txt, NULL);
-
-which will publish myweb._http._tcp.local for any hosts looking for web servers,
-and point them to <hostname>.local:80
-
-Relevant information will be sent as additional records to reduce number of
-requests required from a client.
-
-To remove a service from a netif, run
-  mdns_resp_del_service(struct netif *netif, s8_t slot)
\ No newline at end of file
diff --git a/components/net/lwip-2.1.0/doc/mqtt_client.txt b/components/net/lwip-2.1.0/doc/mqtt_client.txt
deleted file mode 100644
index 7fd93a8edf..0000000000
--- a/components/net/lwip-2.1.0/doc/mqtt_client.txt
+++ /dev/null
@@ -1,162 +0,0 @@
-MQTT client for lwIP
-
-Author: Erik Andersson
-
-Details of the MQTT protocol can be found at:
-http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html 
-
------------------------------------------------------------------
-1. Initial steps, reserve memory and make connection to server:
-
-1.1: Provide storage
-
-Static allocation:
-  mqtt_client_t static_client;
-  example_do_connect(&static_client);
-
-Dynamic allocation:
-  mqtt_client_t *client = mqtt_client_new();
-  if(client != NULL) {
-    example_do_connect(&client);
-  }
-  
-1.2: Establish Connection with server
-
-void example_do_connect(mqtt_client_t *client)
-{
-  struct mqtt_connect_client_info_t ci;
-  err_t err;
-  
-  /* Setup an empty client info structure */
-  memset(&ci, 0, sizeof(ci));
-  
-  /* Minimal amount of information required is client identifier, so set it here */ 
-  ci.client_id = "lwip_test";
-  
-  /* Initiate client and connect to server, if this fails immediately an error code is returned
-     otherwise mqtt_connection_cb will be called with connection result after attempting 
-     to establish a connection with the server. 
-     For now MQTT version 3.1.1 is always used */
-  
-  err = mqtt_client_connect(client, ip_addr, MQTT_PORT, mqtt_connection_cb, 0, &ci);
-  
-  /* For now just print the result code if something goes wrong */
-  if(err != ERR_OK) {
-    printf("mqtt_connect return %d\n", err);
-  }
-}
-
-Connection to server can also be probed by calling mqtt_client_is_connected(client) 
-
------------------------------------------------------------------
-2. Implementing the connection status callback
-
-
-static void mqtt_connection_cb(mqtt_client_t *client, void *arg, mqtt_connection_status_t status)
-{
-  err_t err;
-  if(status == MQTT_CONNECT_ACCEPTED) {
-    printf("mqtt_connection_cb: Successfully connected\n");
-    
-    /* Setup callback for incoming publish requests */
-    mqtt_set_inpub_callback(client, mqtt_incoming_publish_cb, mqtt_incoming_data_cb, arg);
-    
-    /* Subscribe to a topic named "subtopic" with QoS level 1, call mqtt_sub_request_cb with result */ 
-    err = mqtt_subscribe(client, "subtopic", 1, mqtt_sub_request_cb, arg);
-
-    if(err != ERR_OK) {
-      printf("mqtt_subscribe return: %d\n", err);
-    }
-  } else {
-    printf("mqtt_connection_cb: Disconnected, reason: %d\n", status);
-    
-    /* Its more nice to be connected, so try to reconnect */
-    example_do_connect(client);
-  }  
-}
-
-static void mqtt_sub_request_cb(void *arg, err_t result)
-{
-  /* Just print the result code here for simplicity, 
-     normal behaviour would be to take some action if subscribe fails like 
-     notifying user, retry subscribe or disconnect from server */
-  printf("Subscribe result: %d\n", result);
-}
-
------------------------------------------------------------------
-3. Implementing callbacks for incoming publish and data
-
-/* The idea is to demultiplex topic and create some reference to be used in data callbacks
-   Example here uses a global variable, better would be to use a member in arg
-   If RAM and CPU budget allows it, the easiest implementation might be to just take a copy of
-   the topic string and use it in mqtt_incoming_data_cb
-*/
-static int inpub_id;
-static void mqtt_incoming_publish_cb(void *arg, const char *topic, u32_t tot_len)
-{
-  printf("Incoming publish at topic %s with total length %u\n", topic, (unsigned int)tot_len);
-
-  /* Decode topic string into a user defined reference */
-  if(strcmp(topic, "print_payload") == 0) {
-    inpub_id = 0;
-  } else if(topic[0] == 'A') {
-    /* All topics starting with 'A' might be handled at the same way */
-    inpub_id = 1;
-  } else {
-    /* For all other topics */
-    inpub_id = 2;
-  }
-}
-
-static void mqtt_incoming_data_cb(void *arg, const u8_t *data, u16_t len, u8_t flags)
-{
-  printf("Incoming publish payload with length %d, flags %u\n", len, (unsigned int)flags);
-
-  if(flags & MQTT_DATA_FLAG_LAST) {
-    /* Last fragment of payload received (or whole part if payload fits receive buffer
-       See MQTT_VAR_HEADER_BUFFER_LEN)  */
-
-    /* Call function or do action depending on reference, in this case inpub_id */
-    if(inpub_id == 0) {
-      /* Don't trust the publisher, check zero termination */
-      if(data[len-1] == 0) {
-        printf("mqtt_incoming_data_cb: %s\n", (const char *)data);
-      }
-    } else if(inpub_id == 1) {
-      /* Call an 'A' function... */
-    } else {
-      printf("mqtt_incoming_data_cb: Ignoring payload...\n");
-    }
-  } else {
-    /* Handle fragmented payload, store in buffer, write to file or whatever */
-  }
-}
-
------------------------------------------------------------------
-4. Using outgoing publish
-
-
-void example_publish(mqtt_client_t *client, void *arg)
-{
-  const char *pub_payload= "PubSubHubLubJub";
-  err_t err;
-  u8_t qos = 2; /* 0 1 or 2, see MQTT specification */
-  u8_t retain = 0; /* No don't retain such crappy payload... */
-  err = mqtt_publish(client, "pub_topic", pub_payload, strlen(pub_payload), qos, retain, mqtt_pub_request_cb, arg);
-  if(err != ERR_OK) {
-    printf("Publish err: %d\n", err);
-  }
-}
-
-/* Called when publish is complete either with sucess or failure */
-static void mqtt_pub_request_cb(void *arg, err_t result)
-{
-  if(result != ERR_OK) {
-    printf("Publish result: %d\n", result);
-  }
-}
-
------------------------------------------------------------------
-5. Disconnecting
-
-Simply call mqtt_disconnect(client)
diff --git a/components/net/lwip-2.1.0/doc/ppp.txt b/components/net/lwip-2.1.0/doc/ppp.txt
deleted file mode 100644
index 8b88b3a671..0000000000
--- a/components/net/lwip-2.1.0/doc/ppp.txt
+++ /dev/null
@@ -1,529 +0,0 @@
-PPP interface for lwIP
-
-Author: Sylvain Rochet
-
-Table of Contents:
-
-1 - Supported PPP protocols and features
-2 - Raw API PPP example for all protocols
-3 - PPPoS input path (raw API, IRQ safe API, TCPIP API)
-4 - Thread safe PPP API (PPPAPI)
-5 - Notify phase callback (PPP_NOTIFY_PHASE)
-6 - Upgrading from lwIP <= 1.4.x to lwIP >= 2.0.x
-
-
-
-1 Supported PPP protocols and features
-======================================
-
-Supported Low level protocols:
-* PPP over serial using HDLC-like framing, such as wired dialup modems
-  or mobile telecommunications GPRS/EDGE/UMTS/HSPA+/LTE modems
-* PPP over Ethernet, such as xDSL modems
-* PPP over L2TP (Layer 2 Tunneling Protocol) LAC (L2TP Access Concentrator),
-  IP tunnel over UDP, such as VPN access
-
-Supported auth protocols:
-* PAP, Password Authentication Protocol
-* CHAP, Challenge-Handshake Authentication Protocol, also known as CHAP-MD5
-* MSCHAPv1, Microsoft version of CHAP, version 1
-* MSCHAPv2, Microsoft version of CHAP, version 2
-* EAP, Extensible Authentication Protocol
-
-Supported address protocols:
-* IPCP, IP Control Protocol, IPv4 addresses negotiation
-* IP6CP, IPv6 Control Protocol, IPv6 link-local addresses negotiation
-
-Supported encryption protocols:
-* MPPE, Microsoft Point-to-Point Encryption
-
-Supported compression or miscellaneous protocols, for serial links only:
-* PFC, Protocol Field Compression
-* ACFC, Address-and-Control-Field-Compression
-* ACCM, Asynchronous-Control-Character-Map
-* VJ, Van Jacobson TCP/IP Header Compression
-
-
-
-2 Raw API PPP example for all protocols
-=======================================
-
-As usual, raw API for lwIP means the lightweight API which *MUST* only be used
-for NO_SYS=1 systems or called inside lwIP core thread for NO_SYS=0 systems.
-
-/*
- * Globals
- * =======
- */
-
-/* The PPP control block */
-ppp_pcb *ppp;
-
-/* The PPP IP interface */
-struct netif ppp_netif;
-
-
-/*
- * PPP status callback
- * ===================
- *
- * PPP status callback is called on PPP status change (up, down, …) from lwIP
- * core thread
- */
-
-/* PPP status callback example */
-static void status_cb(ppp_pcb *pcb, int err_code, void *ctx) {
-  struct netif *pppif = ppp_netif(pcb);
-  LWIP_UNUSED_ARG(ctx);
-
-  switch(err_code) {
-    case PPPERR_NONE: {
-#if LWIP_DNS
-      const ip_addr_t *ns;
-#endif /* LWIP_DNS */
-      printf("status_cb: Connected\n");
-#if PPP_IPV4_SUPPORT
-      printf("   our_ipaddr  = %s\n", ipaddr_ntoa(&pppif->ip_addr));
-      printf("   his_ipaddr  = %s\n", ipaddr_ntoa(&pppif->gw));
-      printf("   netmask     = %s\n", ipaddr_ntoa(&pppif->netmask));
-#if LWIP_DNS
-      ns = dns_getserver(0);
-      printf("   dns1        = %s\n", ipaddr_ntoa(ns));
-      ns = dns_getserver(1);
-      printf("   dns2        = %s\n", ipaddr_ntoa(ns));
-#endif /* LWIP_DNS */
-#endif /* PPP_IPV4_SUPPORT */
-#if PPP_IPV6_SUPPORT
-      printf("   our6_ipaddr = %s\n", ip6addr_ntoa(netif_ip6_addr(pppif, 0)));
-#endif /* PPP_IPV6_SUPPORT */
-      break;
-    }
-    case PPPERR_PARAM: {
-      printf("status_cb: Invalid parameter\n");
-      break;
-    }
-    case PPPERR_OPEN: {
-      printf("status_cb: Unable to open PPP session\n");
-      break;
-    }
-    case PPPERR_DEVICE: {
-      printf("status_cb: Invalid I/O device for PPP\n");
-      break;
-    }
-    case PPPERR_ALLOC: {
-      printf("status_cb: Unable to allocate resources\n");
-      break;
-    }
-    case PPPERR_USER: {
-      printf("status_cb: User interrupt\n");
-      break;
-    }
-    case PPPERR_CONNECT: {
-      printf("status_cb: Connection lost\n");
-      break;
-    }
-    case PPPERR_AUTHFAIL: {
-      printf("status_cb: Failed authentication challenge\n");
-      break;
-    }
-    case PPPERR_PROTOCOL: {
-      printf("status_cb: Failed to meet protocol\n");
-      break;
-    }
-    case PPPERR_PEERDEAD: {
-      printf("status_cb: Connection timeout\n");
-      break;
-    }
-    case PPPERR_IDLETIMEOUT: {
-      printf("status_cb: Idle Timeout\n");
-      break;
-    }
-    case PPPERR_CONNECTTIME: {
-      printf("status_cb: Max connect time reached\n");
-      break;
-    }
-    case PPPERR_LOOPBACK: {
-      printf("status_cb: Loopback detected\n");
-      break;
-    }
-    default: {
-      printf("status_cb: Unknown error code %d\n", err_code);
-      break;
-    }
-  }
-
-/*
- * This should be in the switch case, this is put outside of the switch
- * case for example readability.
- */
-
-  if (err_code == PPPERR_NONE) {
-    return;
-  }
-
-  /* ppp_close() was previously called, don't reconnect */
-  if (err_code == PPPERR_USER) {
-    /* ppp_free(); -- can be called here */
-    return;
-  }
-
-  /*
-   * Try to reconnect in 30 seconds, if you need a modem chatscript you have
-   * to do a much better signaling here ;-)
-   */
-  ppp_connect(pcb, 30);
-  /* OR ppp_listen(pcb); */
-}
-
-
-/*
- * Creating a new PPPoS session
- * ============================
- *
- * In lwIP, PPPoS is not PPPoSONET, in lwIP PPPoS is PPPoSerial.
- */
-
-#include "netif/ppp/pppos.h"
-
-/*
- * PPPoS serial output callback
- *
- * ppp_pcb, PPP control block
- * data, buffer to write to serial port
- * len, length of the data buffer
- * ctx, optional user-provided callback context pointer
- *
- * Return value: len if write succeed
- */
-static u32_t output_cb(ppp_pcb *pcb, u8_t *data, u32_t len, void *ctx) {
-  return uart_write(UART, data, len);
-}
-
-/*
- * Create a new PPPoS interface
- *
- * ppp_netif, netif to use for this PPP link, i.e. PPP IP interface
- * output_cb, PPPoS serial output callback
- * status_cb, PPP status callback, called on PPP status change (up, down, …)
- * ctx_cb, optional user-provided callback context pointer
- */
-ppp = pppos_create(&ppp_netif,
-       output_cb, status_cb, ctx_cb);
-
-
-/*
- * Creating a new PPPoE session
- * ============================
- */
-
-#include "netif/ppp/pppoe.h"
-
-/*
- * Create a new PPPoE interface
- *
- * ppp_netif, netif to use for this PPP link, i.e. PPP IP interface
- * ethif, already existing and setup Ethernet interface to use
- * service_name, PPPoE service name discriminator (not supported yet)
- * concentrator_name, PPPoE concentrator name discriminator (not supported yet)
- * status_cb, PPP status callback, called on PPP status change (up, down, …)
- * ctx_cb, optional user-provided callback context pointer
- */
-ppp = pppoe_create(&ppp_netif,
-       &ethif,
-       service_name, concentrator_name,
-       status_cb, ctx_cb);
-
-
-/*
- * Creating a new PPPoL2TP session
- * ===============================
- */
-
-#include "netif/ppp/pppol2tp.h"
-
-/*
- * Create a new PPPoL2TP interface
- *
- * ppp_netif, netif to use for this PPP link, i.e. PPP IP interface
- * netif, optional already existing and setup output netif, necessary if you
- *        want to set this interface as default route to settle the chicken
- *        and egg problem with VPN links
- * ipaddr, IP to connect to
- * port, UDP port to connect to (usually 1701)
- * secret, L2TP secret to use
- * secret_len, size in bytes of the L2TP secret
- * status_cb, PPP status callback, called on PPP status change (up, down, …)
- * ctx_cb, optional user-provided callback context pointer
- */
-ppp = pppol2tp_create(&ppp_netif,
-       struct netif *netif, ip_addr_t *ipaddr, u16_t port,
-       u8_t *secret, u8_t secret_len,
-       ppp_link_status_cb_fn link_status_cb, void *ctx_cb);
-
-
-/*
- * Initiate PPP client connection
- * ==============================
- */
-
-/* Set this interface as default route */
-ppp_set_default(ppp);
-
-/*
- * Basic PPP client configuration. Can only be set if PPP session is in the
- * dead state (i.e. disconnected). We don't need to provide thread-safe
- * equivalents through PPPAPI because those helpers are only changing
- * structure members while session is inactive for lwIP core. Configuration
- * only need to be done once.
- */
-
-/* Ask the peer for up to 2 DNS server addresses. */
-ppp_set_usepeerdns(ppp, 1);
-
-/* Auth configuration, this is pretty self-explanatory */
-ppp_set_auth(ppp, PPPAUTHTYPE_ANY, "login", "password");
-
-/*
- * Initiate PPP negotiation, without waiting (holdoff=0), can only be called
- * if PPP session is in the dead state (i.e. disconnected).
- */
-u16_t holdoff = 0;
-ppp_connect(ppp, holdoff);
-
-
-/*
- * Initiate PPP server listener
- * ============================
- */
-
-/*
- * Basic PPP server configuration. Can only be set if PPP session is in the
- * dead state (i.e. disconnected). We don't need to provide thread-safe
- * equivalents through PPPAPI because those helpers are only changing
- * structure members while session is inactive for lwIP core. Configuration
- * only need to be done once.
- */
-ip4_addr_t addr;
-
-/* Set our address */
-IP4_ADDR(&addr, 192,168,0,1);
-ppp_set_ipcp_ouraddr(ppp, &addr);
-
-/* Set peer(his) address */
-IP4_ADDR(&addr, 192,168,0,2);
-ppp_set_ipcp_hisaddr(ppp, &addr);
-
-/* Set primary DNS server */
-IP4_ADDR(&addr, 192,168,10,20);
-ppp_set_ipcp_dnsaddr(ppp, 0, &addr);
-
-/* Set secondary DNS server */
-IP4_ADDR(&addr, 192,168,10,21);
-ppp_set_ipcp_dnsaddr(ppp, 1, &addr);
-
-/* Auth configuration, this is pretty self-explanatory */
-ppp_set_auth(ppp, PPPAUTHTYPE_ANY, "login", "password");
-
-/* Require peer to authenticate */
-ppp_set_auth_required(ppp, 1);
-
-/*
- * Only for PPPoS, the PPP session should be up and waiting for input.
- *
- * Note: for PPPoS, ppp_connect() and ppp_listen() are actually the same thing.
- * The listen call is meant for future support of PPPoE and PPPoL2TP server
- * mode, where we will need to negotiate the incoming PPPoE session or L2TP
- * session before initiating PPP itself. We need this call because there is
- * two passive modes for PPPoS, ppp_set_passive and ppp_set_silent.
- */
-ppp_set_silent(pppos, 1);
-
-/*
- * Initiate PPP listener (i.e. wait for an incoming connection), can only
- * be called if PPP session is in the dead state (i.e. disconnected).
- */
-ppp_listen(ppp);
-
-
-/*
- * Closing PPP connection
- * ======================
- */
-
-/*
- * Initiate the end of the PPP session, without carrier lost signal
- * (nocarrier=0), meaning a clean shutdown of PPP protocols.
- * You can call this function at anytime.
- */
-u8_t nocarrier = 0;
-ppp_close(ppp, nocarrier);
-/*
- * Then you must wait your status_cb() to be called, it may takes from a few
- * seconds to several tens of seconds depending on the current PPP state.
- */
-
-/*
- * Freeing a PPP connection
- * ========================
- */
-
-/*
- * Free the PPP control block, can only be called if PPP session is in the
- * dead state (i.e. disconnected). You need to call ppp_close() before.
- */
-ppp_free(ppp);
-
-
-
-3 PPPoS input path (raw API, IRQ safe API, TCPIP API)
-=====================================================
-
-Received data on serial port should be sent to lwIP using the pppos_input()
-function or the pppos_input_tcpip() function.
-
-If NO_SYS is 1 and if PPP_INPROC_IRQ_SAFE is 0 (the default), pppos_input()
-is not IRQ safe and then *MUST* only be called inside your main loop.
-
-Whatever the NO_SYS value, if PPP_INPROC_IRQ_SAFE is 1, pppos_input() is IRQ
-safe and can be safely called from an interrupt context, using that is going
-to reduce your need of buffer if pppos_input() is called byte after byte in
-your rx serial interrupt.
-
-if NO_SYS is 0, the thread safe way outside an interrupt context is to use
-the pppos_input_tcpip() function to pass input data to the lwIP core thread
-using the TCPIP API. This is thread safe in all cases but you should avoid
-passing data byte after byte because it uses heavy locking (mailbox) and it
-allocates pbuf, better fill them !
-
-if NO_SYS is 0 and if PPP_INPROC_IRQ_SAFE is 1, you may also use pppos_input()
-from an RX thread, however pppos_input() is not thread safe by itself. You can
-do that *BUT* you should NEVER call pppos_connect(), pppos_listen() and
-ppp_free() if pppos_input() can still be running, doing this is NOT thread safe
-at all. Using PPP_INPROC_IRQ_SAFE from an RX thread is discouraged unless you
-really know what you are doing, your move ;-)
-
-
-/*
- * Fonction to call for received data
- *
- * ppp, PPP control block
- * buffer, input buffer
- * buffer_len, buffer length in bytes
- */
-void pppos_input(ppp, buffer, buffer_len);
-
-or
-
-void pppos_input_tcpip(ppp, buffer, buffer_len);
-
-
-
-4 Thread safe PPP API (PPPAPI)
-==============================
-
-There is a thread safe API for all corresponding ppp_* functions, you have to
-enable LWIP_PPP_API in your lwipopts.h file, then see
-include/netif/ppp/pppapi.h, this is actually pretty obvious.
-
-
-
-5 Notify phase callback (PPP_NOTIFY_PHASE)
-==========================================
-
-Notify phase callback, enabled using the PPP_NOTIFY_PHASE config option, let
-you configure a callback that is called on each PPP internal state change.
-This is different from the status callback which only warns you about
-up(running) and down(dead) events.
-
-Notify phase callback can be used, for example, to set a LED pattern depending
-on the current phase of the PPP session. Here is a callback example which
-tries to mimic what we usually see on xDSL modems while they are negotiating
-the link, which should be self-explanatory:
-
-static void ppp_notify_phase_cb(ppp_pcb *pcb, u8_t phase, void *ctx) {
-  switch (phase) {
-
-  /* Session is down (either permanently or briefly) */
-  case PPP_PHASE_DEAD:
-    led_set(PPP_LED, LED_OFF);
-    break;
-
-  /* We are between two sessions */
-  case PPP_PHASE_HOLDOFF:
-    led_set(PPP_LED, LED_SLOW_BLINK);
-    break;
-
-  /* Session just started */
-  case PPP_PHASE_INITIALIZE:
-    led_set(PPP_LED, LED_FAST_BLINK);
-    break;
-
-  /* Session is running */
-  case PPP_PHASE_RUNNING:
-    led_set(PPP_LED, LED_ON);
-    break;
-
-  default:
-    break;
-  }
-}
-
-
-
-6 Upgrading from lwIP <= 1.4.x to lwIP >= 2.0.x
-===============================================
-
-PPP API was fully reworked between 1.4.x and 2.0.x releases. However porting
-from previous lwIP version is pretty easy:
-
-* Previous PPP API used an integer to identify PPP sessions, we are now
-  using ppp_pcb* control block, therefore all functions changed from "int ppp"
-  to "ppp_pcb *ppp"
-
-* struct netif was moved outside the PPP structure, you have to provide a netif
-  for PPP interface in pppoX_create() functions
-
-* PPP session are not started automatically after you created them anymore,
-  you have to call ppp_connect(), this way you can configure the session before
-  starting it.
-
-* Previous PPP API used CamelCase, we are now using snake_case.
-
-* Previous PPP API mixed PPPoS and PPPoE calls, this isn't the case anymore,
-  PPPoS functions are now prefixed pppos_ and PPPoE functions are now prefixed
-  pppoe_, common functions are now prefixed ppp_.
-
-* New PPPERR_ error codes added, check you have all of them in your status
-  callback function
-
-* Only the following include files should now be used in user application:
-  #include "netif/ppp/pppapi.h"
-  #include "netif/ppp/pppos.h"
-  #include "netif/ppp/pppoe.h"
-  #include "netif/ppp/pppol2tp.h"
-
-  Functions from ppp.h can be used, but you don't need to include this header
-  file as it is already included by above header files.
-
-* PPP_INPROC_OWNTHREAD was broken by design and was removed, you have to create
-  your own serial rx thread
-
-* PPP_INPROC_MULTITHREADED option was misnamed and confusing and was renamed
-  PPP_INPROC_IRQ_SAFE, please read the "PPPoS input path" documentation above
-  because you might have been fooled by that
-
-* If you used tcpip_callback_with_block() on ppp_ functions you may wish to use
-  the PPPAPI API instead.
-
-* ppp_sighup and ppp_close functions were merged using an optional argument
-  "nocarrier" on ppp_close.
-
-* DNS servers are now only remotely asked if LWIP_DNS is set and if
-  ppp_set_usepeerdns() is set to true, they are now automatically registered
-  using the dns_setserver() function so you don't need to do that in the PPP
-  callback anymore.
-
-* PPPoS does not use the SIO API anymore, as such it now requires a serial
-  output callback in place of sio_write
-
-* PPP_MAXIDLEFLAG is now in ms instead of jiffies
diff --git a/components/net/lwip-2.1.0/doc/savannah.txt b/components/net/lwip-2.1.0/doc/savannah.txt
deleted file mode 100644
index a98418d960..0000000000
--- a/components/net/lwip-2.1.0/doc/savannah.txt
+++ /dev/null
@@ -1,120 +0,0 @@
-Daily Use Guide for using Savannah for lwIP
-
-Table of Contents:
-
-1 - Obtaining lwIP from the Git repository
-2 - Committers/developers Git access using SSH
-3 - Merging a development branch to master branch
-4 - How to release lwIP
-
-
-
-1 Obtaining lwIP from the Git repository
-----------------------------------------
-
-To perform an anonymous Git clone of the master branch (this is where
-bug fixes and incremental enhancements occur), do this:
- git clone git://git.savannah.nongnu.org/lwip.git
-
-Or, obtain a stable branch (updated with bug fixes only) as follows:
- git clone --branch DEVEL-1_4_1 git://git.savannah.nongnu.org/lwip.git
-
-Or, obtain a specific (fixed) release as follows:
- git clone --branch STABLE-1_4_1 git://git.savannah.nongnu.org/lwip.git
-
-
-2 Committers/developers Git access using SSH
---------------------------------------------
-
-The Savannah server uses SSH (Secure Shell) protocol 2 authentication and encryption.
-As such, Git commits to the server occur through a SSH tunnel for project members.
-To create a SSH2 key pair in UNIX-like environments, do this:
- ssh-keygen
-
-Under Windows, a recommended SSH client is "PuTTY", freely available with good
-documentation and a graphic user interface. Use its key generator.
-
-Now paste the id_rsa.pub contents into your Savannah account public key list. Wait
-a while so that Savannah can update its configuration (This can take minutes).
-
-Try to login using SSH:
- ssh -v [email protected]
-
-If it tells you:
- Linux vcs.savannah.gnu.org 2.6.32-5-xen-686 #1 SMP Wed Jun 17 17:10:03 UTC 2015 i686
-
- Interactive shell login is not possible for security reasons.
- VCS commands are allowed.
- Last login: Tue May 15 23:10:12 2012 from 82.245.102.129
- You tried to execute:
- Sorry, you are not allowed to execute that command.
- Shared connection to git.sv.gnu.org closed.
-
-then you could login; Savannah refuses to give you a shell - which is OK, as we
-are allowed to use SSH for Git only. Now, you should be able to do this:
- git clone [email protected]:/srv/git/lwip.git
-
-After which you can edit your local files with bug fixes or new features and
-commit them. Make sure you know what you are doing when using Git to make
-changes on the repository. If in doubt, ask on the lwip-members mailing list.
-
-(If SSH asks about authenticity of the host, you can check the key
-fingerprint against https://savannah.nongnu.org/git/?group=lwip
-
-
-3 - Merging a development branch to master branch
--------------------------------------------------
-
-Merging is a straightforward process in Git. How to merge all changes in a
-development branch since our last merge from main:
-
-Checkout the master branch:
- git checkout master
-
-Merge the development branch to master:
- git merge your-development-branch
-
-Resolve any conflict.
-
-Commit the merge result.
- git commit -a
-
-Push your commits:
- git push
-
-
-4 How to release lwIP
----------------------
-
-First, tag the release using Git: (I use release number 1.4.1 throughout
-this example).
- git tag -a STABLE-1_4_1
-
-Share the tag reference by pushing it to remote:
- git push origin STABLE-1_4_1
-
-Prepare the release:
- cp -r lwip lwip-1.4.1
- rm -rf lwip-1.4.1/.git lwip-1.4.1/.gitattributes
-
-Archive the current directory using tar, gzip'd, bzip2'd and zip'd.
- tar czvf lwip-1.4.1.tar.gz lwip-1.4.1
- tar cjvf lwip-1.4.1.tar.bz2 lwip-1.4.1
- zip -r lwip-1.4.1.zip lwip-1.4.1
-
-Now, sign the archives with a detached GPG binary signature as follows:
- gpg -b lwip-1.4.1.tar.gz
- gpg -b lwip-1.4.1.tar.bz2
- gpg -b lwip-1.4.1.zip
-
-Upload these files using anonymous FTP:
- ncftp ftp://savannah.gnu.org/incoming/savannah/lwip
- ncftp> mput *1.4.1.*
-
-Additionally, you may post a news item on Savannah, like this:
-
-A new 1.4.1 release is now available here:
-http://savannah.nongnu.org/files/?group=lwip&highlight=1.4.1
-
-You will have to submit this via the user News interface, then approve
-this via the Administrator News interface.
diff --git a/components/net/lwip-2.1.0/src/apps/README.md b/components/net/lwip-2.1.0/src/apps/README.md
deleted file mode 100644
index 26670858c5..0000000000
--- a/components/net/lwip-2.1.0/src/apps/README.md
+++ /dev/null
@@ -1,6 +0,0 @@
-Some net apps for current version LwIP.
-
-The RT-Thread develop team ported apps. It's easy to use it on finsh/msh.
-
-- ping 
-- tftp
diff --git a/components/net/lwip-2.1.0/CHANGELOG b/components/net/lwip-2.1.2/CHANGELOG
index 032cfa3ee1..5f797e77e3 100644
--- a/components/net/lwip-2.1.0/CHANGELOG
+++ b/components/net/lwip-2.1.2/CHANGELOG
@@ -6,6 +6,61 @@ HISTORY
 
   * [Enter new changes just after this line - do not remove this line]
 
+(STABLE-2.1.2):
+
+  ++ Bugfixes:
+
+  2018-11-21: Jens Nielsen
+  * netbiosns.c: fix expecting too large packet (bug #55069)
+
+  2018-11-19: Dirk Ziegelmeier
+  * smtp.c: fix compiling with strict C compatibility because of strnlen (bug #55034)
+
+  2018-11-12: Simon Goldschmidt
+  * tcp.c: fix overflow check in tcp_recved triggering invalid assertion (bug #55015)
+
+  2018-11-12: Simon Goldschmidt
+  * tcp.c: fix a bug in sending RST segments (sent from port 0)
+
+(STABLE-2.1.1):
+
+  ++ Bugfixes:
+
+  2018-11-01: Joan Lledó
+  * sockets.c: fix bad assertion in lwip_poll_dec_sockets_used() (bug #54933)
+
+  2018-11-01: Dirk Ziegelmeier
+  * ip4.c: don't send 127.* to default netif (bug #54670)
+
+  2018-10-23: David Girault
+  * altcp_tls_mbedtls.c: fix use-after free (bug #54774)
+
+  2018-10-23: Ognjen Bjelica, Dirk Ziegelmeier
+  * snmp_scalar.c: Avoid NULL pointer dereference (bug #54886)
+
+  2018-10-23: Simon Goldschmidt
+  * Fix missing standard includes in multiple files
+
+  2018-10-17: Ivan Warren
+  * def.h: fix casting htonX and ntohX to u16_t (bug #54850)
+
+  2018-10-12: Simon Goldschmidt
+  * Revert "tcp_abandon: no need to buffer pcb->local_port" (fix that source port was 0 for RST
+    called when aborting a connection)
+
+  2018-10-11: Jonas Rabenstein
+  * tcp.c: tcp_recved: check for overflow and warn about too big values (patch #9699)              
+
+  2018-10-06: Joan Lledó
+  * sockets.c: alloc_socket(): Check for LWIP_SOCKET_POLL when setting select-
+    related variables (patch #9696)
+
+  2018-10-04: Spencer
+  * tcp.c: Update prev pointer when skipping entries in tcp_slowtmr (patch #9694)
+
+  2018-09-27: Martine Lenders
+  * lowpan6.c: Fix IEEE 802.15.4 address setting (bug #54749)
+
 (STABLE-2.1.0):
 
   ++ New features:
diff --git a/components/net/lwip-2.1.0/CMakeLists.txt b/components/net/lwip-2.1.2/CMakeLists.txt
index f05c0f6160..f05c0f6160 100644
--- a/components/net/lwip-2.1.0/CMakeLists.txt
+++ b/components/net/lwip-2.1.2/CMakeLists.txt
diff --git a/components/net/lwip-2.1.0/COPYING b/components/net/lwip-2.1.2/COPYING
index e23898b5e8..e23898b5e8 100644
--- a/components/net/lwip-2.1.0/COPYING
+++ b/components/net/lwip-2.1.2/COPYING
diff --git a/components/net/lwip-2.1.0/FEATURES b/components/net/lwip-2.1.2/FEATURES
index a50c5a5e3b..a50c5a5e3b 100644
--- a/components/net/lwip-2.1.0/FEATURES
+++ b/components/net/lwip-2.1.2/FEATURES
diff --git a/components/net/lwip-2.1.0/FILES b/components/net/lwip-2.1.2/FILES
index e6e09989d9..e6e09989d9 100644
--- a/components/net/lwip-2.1.0/FILES
+++ b/components/net/lwip-2.1.2/FILES
diff --git a/components/net/lwip-2.1.0/README b/components/net/lwip-2.1.2/README
index b95f1552e6..b95f1552e6 100644
--- a/components/net/lwip-2.1.0/README
+++ b/components/net/lwip-2.1.2/README
diff --git a/components/net/lwip-2.1.2/README_RT-THREAD.md b/components/net/lwip-2.1.2/README_RT-THREAD.md
new file mode 100644
index 0000000000..c91be2c7f0
--- /dev/null
+++ b/components/net/lwip-2.1.2/README_RT-THREAD.md
@@ -0,0 +1,89 @@
+# lwip 移植说明
+
+为了适配 RT-Thread 网卡设备，RT-Thread 团队基于原 [lwip](http://savannah.nongnu.org/projects/lwip/) 进行了一些修改，本文档记录了相关修改内容。
+
+> 本 lwip-2.1.2 版本基于 [lwip STABLE-2_1_2_RELEASE](https://git.savannah.gnu.org/git/lwip.git) 版本移植而来。
+
+
+| Date | Author | Notes |
+| :---- | :---- | :---- |
+| 2019-09-02 | MurphyZhao | 增加 lwip 2.1.2 移植说明 |
+| 2020-06-18 | xiangxistu | 增加部分 lwIP 2.1.2 移植说明 |
+
+## 修改内容
+
+### src/api
+
+- `src/api/sockets.c` 增加 `lwip_tryget_socket` 函数，作为 `tryget_socket` 函数的全局实现
+- `src/api/sockets.c` 在 `alloc_socket` 函数中，增加 SAL 移植函数 `rt_wqueue_init`
+
+```
+#ifdef SAL_USING_POSIX
+      rt_wqueue_init(&sockets[i].wait_head);
+#endif
+```
+
+### src/app
+
+- 增加 `ping/ping.c`，便于在 finsh/msh 中使用 ping 功能
+- 增加 `tftp/tftp_port.c`，便于在 finsh/msh 中使用 tftp_server 功能
+
+### src/arch
+
+增加 `src/arch` 目录，存储对接 RT-Thread 设备框架的移植文件，从 lwip-2.0.2 版本中的移植文件修改而来。
+
+
+
+以及相对于 lwIP2.0.2 的增加修改内容：
+
+
+* 在 `src/arch/sys_arch.c` 中增加 MTU 与 etharp_output 的初始化
+
+* 在 `src/arch/sys_arch.c` 中增加新添加的邮箱函数
+
+  对邮箱机制的新增加的 sys_mbox_trypost_fromisr 函数予以实现
+
+* 在 `src/arch/sys_arch.c` 中增加新添加的内存堆函数
+
+  对内存堆的新增加的 mem_overflow_check_raw 与 mem_overflow_init_raw 函数予以实现
+  
+* 在 `src/arch/cc.h` 中增加对 lwIP 使用的标准错误代码宏的处理，不再使用 lwIP 内置的错误宏
+
+
+### src/core
+
+- 在 `src/core/dns.c` 的 `dns_setserver` 函数中增加 RT-Thread netdev 相关的移植
+- 在 `src/core/netif.c` 中增加 RT-Thread netdev 相关的移植
+
+### src/include
+
+- 在 `src/include/lwip/priv/sockets_priv.h` 中增加 SAL 相关的移植
+
+    在 `lwip_sock` 结构体中增加 `  rt_wqueue_t wait_head;` 成员
+
+- 在 `src/include/lwip/prot/ieee.h` 中增加 EAPOL, EAP over LAN 标识
+
+- 在 `src/include/lwip/init.h` 中的版本号后增加 `U` 标识
+
+- 在 `src/include/lwip/sockets.h` 中增加 `LWIP_SOCKET_SELECT`，解决开启 RT_USING_POSIX 时的冲突
+
+- 在 `src/include/lwip/arch.h` 中修改 `<unistd.h> `为 `"sys/types.h" `，解决编译冲突
+
+    并添加 typedef int ssize_t 定义，补足因 libc 与 dfs 未开启时 ssize_t 的定义不足问题
+
+- 在 `src/include/netif/` 中增加 `ethernetif.h`，用于对接 RT-Thread 网卡设备
+
+### src/netif
+
+- 在 `src/netif/` 中增加 `ethernetif.c`，用于对接 RT-Thread 网卡设备
+- 在 `src/netif/lowpan6.c` 中增加 `LWIP_6LOWPAN` 宏定义，以防止编译错误
+
+### src
+
+- 在 src 目录下，增加 `src/lwipopts.h`，用于 lwip 功能裁剪以及配置设置
+- 在 src 目录下，增加 `src/lwippools.h`，用于定义 `LWIP_MALLOC_MEMPOOL`
+
+### 其它
+
+- 增加 SConscript 文件，用于 scons 构建
+- 增加 README_RT-THREAD.md 文件，用于记录相对原 lwip 源码的改动
diff --git a/components/net/lwip-2.1.0/SConscript b/components/net/lwip-2.1.2/SConscript
index 36baf9418b..04f59167d5 100644
--- a/components/net/lwip-2.1.0/SConscript
+++ b/components/net/lwip-2.1.2/SConscript
@@ -260,6 +260,6 @@ if GetDepend(['RT_USING_LWIP_IPV6']):
 if GetDepend(['RT_LWIP_USING_PING']):
     src += lwipping_SRCS
 
-group = DefineGroup('lwIP', src, depend = ['RT_USING_LWIP', 'RT_USING_LWIP210'], CPPPATH = path)
+group = DefineGroup('lwIP', src, depend = ['RT_USING_LWIP', 'RT_USING_LWIP212'], CPPPATH = path)
 
 Return('group')
diff --git a/components/net/lwip-2.1.0/UPGRADING b/components/net/lwip-2.1.2/UPGRADING
index 21ad8cc3d2..21ad8cc3d2 100644
--- a/components/net/lwip-2.1.0/UPGRADING
+++ b/components/net/lwip-2.1.2/UPGRADING
diff --git a/components/net/lwip-2.1.0/src/FILES b/components/net/lwip-2.1.2/src/FILES
index 0be0741d08..0be0741d08 100644
--- a/components/net/lwip-2.1.0/src/FILES
+++ b/components/net/lwip-2.1.2/src/FILES
diff --git a/components/net/lwip-2.1.0/src/Filelists.cmake b/components/net/lwip-2.1.2/src/Filelists.cmake
index 9fa1b659c9..c765628722 100644
--- a/components/net/lwip-2.1.0/src/Filelists.cmake
+++ b/components/net/lwip-2.1.2/src/Filelists.cmake
@@ -10,7 +10,7 @@
 
 set(LWIP_VERSION_MAJOR    "2")
 set(LWIP_VERSION_MINOR    "1")
-set(LWIP_VERSION_REVISION "0")
+set(LWIP_VERSION_REVISION "2")
 # LWIP_VERSION_RC is set to LWIP_RC_RELEASE for official releases
 # LWIP_VERSION_RC is set to LWIP_RC_DEVELOPMENT for Git versions
 # Numbers 1..31 are reserved for release candidates
diff --git a/components/net/lwip-2.1.0/src/Filelists.mk b/components/net/lwip-2.1.2/src/Filelists.mk
index 828b9f2ae6..828b9f2ae6 100644
--- a/components/net/lwip-2.1.0/src/Filelists.mk
+++ b/components/net/lwip-2.1.2/src/Filelists.mk
diff --git a/components/net/lwip-2.1.0/src/api/api_lib.c b/components/net/lwip-2.1.2/src/api/api_lib.c
index 5e9ceafa53..e03b8b7451 100644
--- a/components/net/lwip-2.1.0/src/api/api_lib.c
+++ b/components/net/lwip-2.1.2/src/api/api_lib.c
@@ -201,12 +201,12 @@ netconn_prepare_delete(struct netconn *conn)
 
   API_MSG_VAR_ALLOC(msg);
   API_MSG_VAR_REF(msg).conn = conn;
-#if LWIP_TCP
 #if LWIP_SO_SNDTIMEO || LWIP_SO_LINGER
   /* get the time we started, which is later compared to
      sys_now() + conn->send_timeout */
   API_MSG_VAR_REF(msg).msg.sd.time_started = sys_now();
 #else /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */
+#if LWIP_TCP
   API_MSG_VAR_REF(msg).msg.sd.polls_left =
     ((LWIP_TCP_CLOSE_TIMEOUT_MS_DEFAULT + TCP_SLOW_INTERVAL - 1) / TCP_SLOW_INTERVAL) + 1;
 #endif /* LWIP_TCP */
diff --git a/components/net/lwip-2.1.0/src/api/api_msg.c b/components/net/lwip-2.1.2/src/api/api_msg.c
index 39531024ec..39531024ec 100644
--- a/components/net/lwip-2.1.0/src/api/api_msg.c
+++ b/components/net/lwip-2.1.2/src/api/api_msg.c
diff --git a/components/net/lwip-2.1.0/src/api/err.c b/components/net/lwip-2.1.2/src/api/err.c
index dd2b62dab1..dd2b62dab1 100644
--- a/components/net/lwip-2.1.0/src/api/err.c
+++ b/components/net/lwip-2.1.2/src/api/err.c
diff --git a/components/net/lwip-2.1.0/src/api/if_api.c b/components/net/lwip-2.1.2/src/api/if_api.c
index 8e094d090a..8e094d090a 100644
--- a/components/net/lwip-2.1.0/src/api/if_api.c
+++ b/components/net/lwip-2.1.2/src/api/if_api.c
diff --git a/components/net/lwip-2.1.0/src/api/netbuf.c b/components/net/lwip-2.1.2/src/api/netbuf.c
index 3b910de106..3b910de106 100644
--- a/components/net/lwip-2.1.0/src/api/netbuf.c
+++ b/components/net/lwip-2.1.2/src/api/netbuf.c
diff --git a/components/net/lwip-2.1.0/src/api/netdb.c b/components/net/lwip-2.1.2/src/api/netdb.c
index 87714259d5..87714259d5 100644
--- a/components/net/lwip-2.1.0/src/api/netdb.c
+++ b/components/net/lwip-2.1.2/src/api/netdb.c
diff --git a/components/net/lwip-2.1.0/src/api/netifapi.c b/components/net/lwip-2.1.2/src/api/netifapi.c
index 25957cd5c3..25957cd5c3 100644
--- a/components/net/lwip-2.1.0/src/api/netifapi.c
+++ b/components/net/lwip-2.1.2/src/api/netifapi.c
diff --git a/components/net/lwip-2.1.0/src/api/sockets.c b/components/net/lwip-2.1.2/src/api/sockets.c
index 4e343c55c0..4fea5b3727 100644
--- a/components/net/lwip-2.1.0/src/api/sockets.c
+++ b/components/net/lwip-2.1.2/src/api/sockets.c
@@ -541,17 +541,17 @@ alloc_socket(struct netconn *newconn, int accepted)
          after having marked it as used. */
       SYS_ARCH_UNPROTECT(lev);
       sockets[i].lastdata.pbuf = NULL;
-#if LWIP_SOCKET_SELECT
+#if LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL
       LWIP_ASSERT("sockets[i].select_waiting == 0", sockets[i].select_waiting == 0);
       sockets[i].rcvevent   = 0;
       /* TCP sendbuf is empty, but the socket is not yet writable until connected
        * (unless it has been created by accept()). */
       sockets[i].sendevent  = (NETCONNTYPE_GROUP(newconn->type) == NETCONN_TCP ? (accepted != 0) : 1);
       sockets[i].errevent   = 0;
-#endif /* LWIP_SOCKET_SELECT */
-      #ifdef SAL_USING_POSIX
-            rt_wqueue_init(&sockets[i].wait_head);
-      #endif
+#endif /* LWIP_SOCKET_SELECT || LWIP_SOCKET_POLL */
+#ifdef SAL_USING_POSIX
+      rt_wqueue_init(&sockets[i].wait_head);
+#endif
       return i + LWIP_SOCKET_OFFSET;
     }
     SYS_ARCH_UNPROTECT(lev);
@@ -1327,7 +1327,7 @@ lwip_recvmsg(int s, struct msghdr *message, int flags)
     if ((message->msg_iov[i].iov_base == NULL) || ((ssize_t)message->msg_iov[i].iov_len <= 0) ||
         ((size_t)(ssize_t)message->msg_iov[i].iov_len != message->msg_iov[i].iov_len) ||
         ((ssize_t)(buflen + (ssize_t)message->msg_iov[i].iov_len) <= 0)) {
-      sock_set_errno(sock, ERR_VAL);
+      sock_set_errno(sock, err_to_errno(ERR_VAL));
       done_socket(sock);
       return -1;
     }
@@ -2326,7 +2326,6 @@ lwip_poll_dec_sockets_used(struct pollfd *fds, nfds_t nfds)
     /* Go through each struct pollfd in the array. */
     for (fdi = 0; fdi < nfds; fdi++) {
       struct lwip_sock *sock = tryget_socket_unconn_nouse(fds[fdi].fd);
-      LWIP_ASSERT("socket gone at the end of select", sock != NULL);
       if (sock != NULL) {
         done_socket(sock);
       }
diff --git a/components/net/lwip-2.1.0/src/api/tcpip.c b/components/net/lwip-2.1.2/src/api/tcpip.c
index 743553a587..743553a587 100644
--- a/components/net/lwip-2.1.0/src/api/tcpip.c
+++ b/components/net/lwip-2.1.2/src/api/tcpip.c
diff --git a/components/net/lwip-2.1.0/src/apps/altcp_tls/altcp_tls_mbedtls.c b/components/net/lwip-2.1.2/src/apps/altcp_tls/altcp_tls_mbedtls.c
index d241a06116..d642decb54 100644
--- a/components/net/lwip-2.1.0/src/apps/altcp_tls/altcp_tls_mbedtls.c
+++ b/components/net/lwip-2.1.2/src/apps/altcp_tls/altcp_tls_mbedtls.c
@@ -40,17 +40,15 @@
  *   track of the ratio of application data and TLS overhead would be too much.
  *
  * Mandatory security-related configuration:
- * - define ALTCP_MBEDTLS_RNG_FN to a custom GOOD rng function returning 0 on success:
- *   int my_rng_fn(void *ctx, unsigned char *buffer , size_t len)
+ * - define ALTCP_MBEDTLS_RNG_FN to mbedtls_entropy_func to use the standard mbedTLS
+ *   entropy and ensure to add at least one strong entropy source to your mbedtls port
+ *   (implement mbedtls_platform_entropy_poll or mbedtls_hardware_poll providing strong
+ *   entropy)
  * - define ALTCP_MBEDTLS_ENTROPY_PTR and ALTCP_MBEDTLS_ENTROPY_LEN to something providing
  *   GOOD custom entropy
  *
  * Missing things / @todo:
- * - RX data is acknowledged after receiving (tcp_recved is called when enqueueing
- *   the pbuf for mbedTLS receive, not when processed by mbedTLS or the inner
- *   connection; altcp_recved() from inner connection does nothing)
- * - Client connections starting with 'connect()' are not handled yet...
- * - some unhandled things are caught by LWIP_ASSERTs...
+ * - some unhandled/untested things migh be caught by LWIP_ASSERTs...
  */
 
 #include "lwip/opt.h"
@@ -309,17 +307,20 @@ altcp_mbedtls_pass_rx_data(struct altcp_pcb *conn, altcp_mbedtls_state_t *state)
   LWIP_ASSERT("state != NULL", state != NULL);
   buf = state->rx_app;
   if (buf) {
+    state->rx_app = NULL;
     if (conn->recv) {
-      u16_t tot_len = state->rx_app->tot_len;
+      u16_t tot_len = buf->tot_len;
       /* this needs to be increased first because the 'recved' call may come nested */
       state->rx_passed_unrecved += tot_len;
       state->flags |= ALTCP_MBEDTLS_FLAGS_UPPER_CALLED;
-      err = conn->recv(conn->arg, conn, state->rx_app, ERR_OK);
+      err = conn->recv(conn->arg, conn, buf, ERR_OK);
       if (err != ERR_OK) {
         if (err == ERR_ABRT) {
           return ERR_ABRT;
         }
         /* not received, leave the pbuf(s) queued (and decrease 'unrecved' again) */
+        LWIP_ASSERT("state == conn->state", state == conn->state);
+        state->rx_app = buf;
         state->rx_passed_unrecved -= tot_len;
         LWIP_ASSERT("state->rx_passed_unrecved >= 0", state->rx_passed_unrecved >= 0);
         if (state->rx_passed_unrecved < 0) {
@@ -330,7 +331,6 @@ altcp_mbedtls_pass_rx_data(struct altcp_pcb *conn, altcp_mbedtls_state_t *state)
     } else {
       pbuf_free(buf);
     }
-    state->rx_app = NULL;
   } else if ((state->flags & (ALTCP_MBEDTLS_FLAGS_RX_CLOSE_QUEUED | ALTCP_MBEDTLS_FLAGS_RX_CLOSED)) ==
              ALTCP_MBEDTLS_FLAGS_RX_CLOSE_QUEUED) {
     state->flags |= ALTCP_MBEDTLS_FLAGS_RX_CLOSED;
@@ -339,6 +339,11 @@ altcp_mbedtls_pass_rx_data(struct altcp_pcb *conn, altcp_mbedtls_state_t *state)
     }
   }
 
+  /* application may have close the connection */
+  if (conn->state != state) {
+    /* return error code to ensure altcp_mbedtls_handle_rx_appldata() exits the loop */
+    return ERR_CLSD;
+  }
   return ERR_OK;
 }
 
@@ -635,12 +640,13 @@ altcp_tls_context(struct altcp_pcb *conn)
 static void
 altcp_mbedtls_debug(void *ctx, int level, const char *file, int line, const char *str)
 {
-  LWIP_UNUSED_ARG(str);
+  LWIP_UNUSED_ARG(ctx);
   LWIP_UNUSED_ARG(level);
   LWIP_UNUSED_ARG(file);
   LWIP_UNUSED_ARG(line);
-  LWIP_UNUSED_ARG(ctx);
-  /* @todo: output debug string :-) */
+  LWIP_UNUSED_ARG(str);
+
+  LWIP_DEBUGF(ALTCP_MBEDTLS_DEBUG, ("%s:%04d: %s", file, line, str));
 }
 #endif
 
@@ -673,7 +679,7 @@ altcp_tls_create_config(int is_server, int have_cert, int have_pkey, int have_ca
 
   if (TCP_WND < MBEDTLS_SSL_MAX_CONTENT_LEN) {
     LWIP_DEBUGF(ALTCP_MBEDTLS_DEBUG|LWIP_DBG_LEVEL_SERIOUS,
-      ("altcp_tls: TCP_WND is smaller than the RX decrypion buffer, connection RX might stall!\n"));
+      ("altcp_tls: TCP_WND is smaller than the RX decryption buffer, connection RX might stall!\n"));
   }
 
   altcp_mbedtls_mem_init();
diff --git a/components/net/lwip-2.1.0/src/apps/altcp_tls/altcp_tls_mbedtls_mem.c b/components/net/lwip-2.1.2/src/apps/altcp_tls/altcp_tls_mbedtls_mem.c
index 04d47ae51c..04d47ae51c 100644
--- a/components/net/lwip-2.1.0/src/apps/altcp_tls/altcp_tls_mbedtls_mem.c
+++ b/components/net/lwip-2.1.2/src/apps/altcp_tls/altcp_tls_mbedtls_mem.c
diff --git a/components/net/lwip-2.1.0/src/apps/altcp_tls/altcp_tls_mbedtls_mem.h b/components/net/lwip-2.1.2/src/apps/altcp_tls/altcp_tls_mbedtls_mem.h
index b391bf8741..b391bf8741 100644
--- a/components/net/lwip-2.1.0/src/apps/altcp_tls/altcp_tls_mbedtls_mem.h
+++ b/components/net/lwip-2.1.2/src/apps/altcp_tls/altcp_tls_mbedtls_mem.h
diff --git a/components/net/lwip-2.1.0/src/apps/altcp_tls/altcp_tls_mbedtls_structs.h b/components/net/lwip-2.1.2/src/apps/altcp_tls/altcp_tls_mbedtls_structs.h
index 17efaaf638..17efaaf638 100644
--- a/components/net/lwip-2.1.0/src/apps/altcp_tls/altcp_tls_mbedtls_structs.h
+++ b/components/net/lwip-2.1.2/src/apps/altcp_tls/altcp_tls_mbedtls_structs.h
diff --git a/components/net/lwip-2.1.0/src/apps/http/altcp_proxyconnect.c b/components/net/lwip-2.1.2/src/apps/http/altcp_proxyconnect.c
index e3135ba9ae..9a0b2ba198 100644
--- a/components/net/lwip-2.1.0/src/apps/http/altcp_proxyconnect.c
+++ b/components/net/lwip-2.1.2/src/apps/http/altcp_proxyconnect.c
@@ -51,6 +51,8 @@
 #include "lwip/mem.h"
 #include "lwip/init.h"
 
+#include <stdio.h>
+
 /** This string is passed in the HTTP header as "User-Agent: " */
 #ifndef ALTCP_PROXYCONNECT_CLIENT_AGENT
 #define ALTCP_PROXYCONNECT_CLIENT_AGENT "lwIP/" LWIP_VERSION_STRING " (http://savannah.nongnu.org/projects/lwip)"
diff --git a/components/net/lwip-2.1.0/src/apps/http/fs.c b/components/net/lwip-2.1.2/src/apps/http/fs.c
index f15a48016a..f15a48016a 100644
--- a/components/net/lwip-2.1.0/src/apps/http/fs.c
+++ b/components/net/lwip-2.1.2/src/apps/http/fs.c
diff --git a/components/net/lwip-2.1.0/src/apps/http/fs/404.html b/components/net/lwip-2.1.2/src/apps/http/fs/404.html
index 40b343a91e..40b343a91e 100644
--- a/components/net/lwip-2.1.0/src/apps/http/fs/404.html
+++ b/components/net/lwip-2.1.2/src/apps/http/fs/404.html
diff --git a/components/net/lwip-2.1.0/src/apps/http/fs/img/sics.gif b/components/net/lwip-2.1.2/src/apps/http/fs/img/sics.gif
index 0a4fc7bb07..0a4fc7bb07 100644
--- a/components/net/lwip-2.1.0/src/apps/http/fs/img/sics.gif
+++ b/components/net/lwip-2.1.2/src/apps/http/fs/img/sics.gif
diff --git a/components/net/lwip-2.1.0/src/apps/http/fs/index.html b/components/net/lwip-2.1.2/src/apps/http/fs/index.html
index ab575ef089..ab575ef089 100644
--- a/components/net/lwip-2.1.0/src/apps/http/fs/index.html
+++ b/components/net/lwip-2.1.2/src/apps/http/fs/index.html
diff --git a/components/net/lwip-2.1.0/src/apps/http/fsdata.c b/components/net/lwip-2.1.2/src/apps/http/fsdata.c
index ab9da7e13d..ab9da7e13d 100644
--- a/components/net/lwip-2.1.0/src/apps/http/fsdata.c
+++ b/components/net/lwip-2.1.2/src/apps/http/fsdata.c
diff --git a/components/net/lwip-2.1.0/src/apps/http/fsdata.h b/components/net/lwip-2.1.2/src/apps/http/fsdata.h
index d31550d711..d31550d711 100644
--- a/components/net/lwip-2.1.0/src/apps/http/fsdata.h
+++ b/components/net/lwip-2.1.2/src/apps/http/fsdata.h
diff --git a/components/net/lwip-2.1.0/src/apps/http/http_client.c b/components/net/lwip-2.1.2/src/apps/http/http_client.c
index 9198c89d3a..82da60d73a 100644
--- a/components/net/lwip-2.1.0/src/apps/http/http_client.c
+++ b/components/net/lwip-2.1.2/src/apps/http/http_client.c
@@ -55,6 +55,7 @@
 #include "lwip/init.h"
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
 #if LWIP_TCP && LWIP_CALLBACK_API
diff --git a/components/net/lwip-2.1.0/src/apps/http/httpd.c b/components/net/lwip-2.1.2/src/apps/http/httpd.c
index ccc9ba7284..ccc9ba7284 100644
--- a/components/net/lwip-2.1.0/src/apps/http/httpd.c
+++ b/components/net/lwip-2.1.2/src/apps/http/httpd.c
diff --git a/components/net/lwip-2.1.0/src/apps/http/httpd_structs.h b/components/net/lwip-2.1.2/src/apps/http/httpd_structs.h
index 56b97a32b6..56b97a32b6 100644
--- a/components/net/lwip-2.1.0/src/apps/http/httpd_structs.h
+++ b/components/net/lwip-2.1.2/src/apps/http/httpd_structs.h
diff --git a/components/net/lwip-2.1.0/src/apps/http/makefsdata/makefsdata b/components/net/lwip-2.1.2/src/apps/http/makefsdata/makefsdata
index 37b4203e6e..37b4203e6e 100644
--- a/components/net/lwip-2.1.0/src/apps/http/makefsdata/makefsdata
+++ b/components/net/lwip-2.1.2/src/apps/http/makefsdata/makefsdata
diff --git a/components/net/lwip-2.1.0/src/apps/http/makefsdata/makefsdata.c b/components/net/lwip-2.1.2/src/apps/http/makefsdata/makefsdata.c
index 695e94f5f8..695e94f5f8 100644
--- a/components/net/lwip-2.1.0/src/apps/http/makefsdata/makefsdata.c
+++ b/components/net/lwip-2.1.2/src/apps/http/makefsdata/makefsdata.c
diff --git a/components/net/lwip-2.1.0/src/apps/http/makefsdata/readme.txt b/components/net/lwip-2.1.2/src/apps/http/makefsdata/readme.txt
index 3768585ef9..3768585ef9 100644
--- a/components/net/lwip-2.1.0/src/apps/http/makefsdata/readme.txt
+++ b/components/net/lwip-2.1.2/src/apps/http/makefsdata/readme.txt
diff --git a/components/net/lwip-2.1.0/src/apps/http/makefsdata/tinydir.h b/components/net/lwip-2.1.2/src/apps/http/makefsdata/tinydir.h
index 32ae5e84a9..32ae5e84a9 100644
--- a/components/net/lwip-2.1.0/src/apps/http/makefsdata/tinydir.h
+++ b/components/net/lwip-2.1.2/src/apps/http/makefsdata/tinydir.h
diff --git a/components/net/lwip-2.1.0/src/apps/lwiperf/lwiperf.c b/components/net/lwip-2.1.2/src/apps/lwiperf/lwiperf.c
index dbec4dae91..dbec4dae91 100644
--- a/components/net/lwip-2.1.0/src/apps/lwiperf/lwiperf.c
+++ b/components/net/lwip-2.1.2/src/apps/lwiperf/lwiperf.c
diff --git a/components/net/lwip-2.1.0/src/apps/mdns/mdns.c b/components/net/lwip-2.1.2/src/apps/mdns/mdns.c
index aad2728895..aad2728895 100644
--- a/components/net/lwip-2.1.0/src/apps/mdns/mdns.c
+++ b/components/net/lwip-2.1.2/src/apps/mdns/mdns.c
diff --git a/components/net/lwip-2.1.0/src/apps/mqtt/mqtt.c b/components/net/lwip-2.1.2/src/apps/mqtt/mqtt.c
index 269f4a490c..269f4a490c 100644
--- a/components/net/lwip-2.1.0/src/apps/mqtt/mqtt.c
+++ b/components/net/lwip-2.1.2/src/apps/mqtt/mqtt.c
diff --git a/components/net/lwip-2.1.0/src/apps/netbiosns/netbiosns.c b/components/net/lwip-2.1.2/src/apps/netbiosns/netbiosns.c
index 493e20bb76..c94a77910c 100644
--- a/components/net/lwip-2.1.0/src/apps/netbiosns/netbiosns.c
+++ b/components/net/lwip-2.1.2/src/apps/netbiosns/netbiosns.c
@@ -111,6 +111,22 @@ PACK_STRUCT_END
 #  include "arch/epstruct.h"
 #endif
 
+/** NetBIOS message question part */
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+struct netbios_question_hdr {
+  PACK_STRUCT_FLD_8(u8_t  nametype);
+  PACK_STRUCT_FLD_8(u8_t  encname[(NETBIOS_NAME_LEN * 2) + 1]);
+  PACK_STRUCT_FIELD(u16_t type);
+  PACK_STRUCT_FIELD(u16_t cls);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
 /** NetBIOS message name part */
 #ifdef PACK_STRUCT_USE_INCLUDES
 #  include "arch/bpstruct.h"
@@ -335,11 +351,11 @@ netbiosns_recv(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t
   /* if packet is valid */
   if (p != NULL) {
     char   netbios_name[NETBIOS_NAME_LEN + 1];
-    struct netbios_hdr      *netbios_hdr      = (struct netbios_hdr *)p->payload;
-    struct netbios_name_hdr *netbios_name_hdr = (struct netbios_name_hdr *)(netbios_hdr + 1);
+    struct netbios_hdr          *netbios_hdr          = (struct netbios_hdr *)p->payload;
+    struct netbios_question_hdr *netbios_question_hdr = (struct netbios_question_hdr *)(netbios_hdr + 1);
 
     /* is the packet long enough (we need the header in one piece) */
-    if (p->len < (sizeof(struct netbios_hdr) + sizeof(struct netbios_name_hdr))) {
+    if (p->len < (sizeof(struct netbios_hdr) + sizeof(struct netbios_question_hdr))) {
       /* packet too short */
       pbuf_free(p);
       return;
@@ -352,9 +368,9 @@ netbiosns_recv(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t
           ((netbios_hdr->flags & PP_NTOHS(NETB_HFLAG_RESPONSE)) == 0) &&
           (netbios_hdr->questions == PP_NTOHS(1))) {
         /* decode the NetBIOS name */
-        netbiosns_name_decode((char *)(netbios_name_hdr->encname), netbios_name, sizeof(netbios_name));
+        netbiosns_name_decode((char *)(netbios_question_hdr->encname), netbios_name, sizeof(netbios_name));
         /* check the request type */
-        if (netbios_name_hdr->type == PP_HTONS(NETB_QTYPE_NB)) {
+        if (netbios_question_hdr->type == PP_HTONS(NETB_QTYPE_NB)) {
           /* if the packet is for us */
           if (lwip_strnicmp(netbios_name, NETBIOS_LOCAL_NAME, sizeof(NETBIOS_LOCAL_NAME)) == 0) {
             struct pbuf *q;
@@ -376,10 +392,10 @@ netbiosns_recv(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t
               resp->resp_hdr.additionalRRs = 0;
 
               /* prepare NetBIOS header datas */
-              MEMCPY( resp->resp_name.encname, netbios_name_hdr->encname, sizeof(netbios_name_hdr->encname));
-              resp->resp_name.nametype     = netbios_name_hdr->nametype;
-              resp->resp_name.type         = netbios_name_hdr->type;
-              resp->resp_name.cls          = netbios_name_hdr->cls;
+              MEMCPY( resp->resp_name.encname, netbios_question_hdr->encname, sizeof(netbios_question_hdr->encname));
+              resp->resp_name.nametype     = netbios_question_hdr->nametype;
+              resp->resp_name.type         = netbios_question_hdr->type;
+              resp->resp_name.cls          = netbios_question_hdr->cls;
               resp->resp_name.ttl          = PP_HTONL(NETBIOS_NAME_TTL);
               resp->resp_name.datalen      = PP_HTONS(sizeof(resp->resp_name.flags) + sizeof(resp->resp_name.addr));
               resp->resp_name.flags        = PP_HTONS(NETB_NFLAG_NODETYPE_BNODE);
@@ -393,7 +409,7 @@ netbiosns_recv(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t
             }
           }
 #if LWIP_NETBIOS_RESPOND_NAME_QUERY
-        } else if (netbios_name_hdr->type == PP_HTONS(NETB_QTYPE_NBSTAT)) {
+        } else if (netbios_question_hdr->type == PP_HTONS(NETB_QTYPE_NBSTAT)) {
           /* if the packet is for us or general query */
           if (!lwip_strnicmp(netbios_name, NETBIOS_LOCAL_NAME, sizeof(NETBIOS_LOCAL_NAME)) ||
               !lwip_strnicmp(netbios_name, "*", sizeof(NETBIOS_LOCAL_NAME))) {
@@ -419,9 +435,9 @@ netbiosns_recv(void *arg, struct udp_pcb *upcb, struct pbuf *p, const ip_addr_t
               /* resp->answer_hdr.authorityRRs    = PP_HTONS(0); done by memset() */
               /* resp->answer_hdr.additionalRRs   = PP_HTONS(0); done by memset() */
               /* we will copy the length of the station name */
-              resp->name_size                  = netbios_name_hdr->nametype;
+              resp->name_size                  = netbios_question_hdr->nametype;
               /* we will copy the queried name */
-              MEMCPY(resp->query_name, netbios_name_hdr->encname, (NETBIOS_NAME_LEN * 2) + 1);
+              MEMCPY(resp->query_name, netbios_question_hdr->encname, (NETBIOS_NAME_LEN * 2) + 1);
               /* NBSTAT */
               resp->packet_type                = PP_HTONS(0x21);
               /* Internet name */
diff --git a/components/net/lwip-2.1.0/src/apps/ping/ping.c b/components/net/lwip-2.1.2/src/apps/ping/ping.c
index 6d3cfe0fc3..6d3cfe0fc3 100644
--- a/components/net/lwip-2.1.0/src/apps/ping/ping.c
+++ b/components/net/lwip-2.1.2/src/apps/ping/ping.c
diff --git a/components/net/lwip-2.1.0/src/apps/smtp/smtp.c b/components/net/lwip-2.1.2/src/apps/smtp/smtp.c
index 8a87533a6b..55303c35d4 100644
--- a/components/net/lwip-2.1.0/src/apps/smtp/smtp.c
+++ b/components/net/lwip-2.1.2/src/apps/smtp/smtp.c
@@ -65,7 +65,7 @@
 #include "lwip/altcp_tcp.h"
 #include "lwip/altcp_tls.h"
 
-#include <string.h> /* strnlen, memcpy */
+#include <string.h> /* strlen, memcpy */
 #include <stdlib.h>
 
 /** TCP poll interval. Unit is 0.5 sec. */
@@ -353,9 +353,8 @@ smtp_set_server_addr(const char* server)
   LWIP_ASSERT_CORE_LOCKED();
 
   if (server != NULL) {
-    /* strnlen: returns length WITHOUT terminating 0 byte OR
-     * SMTP_MAX_SERVERNAME_LEN+1 when string is too long */
-    len = strnlen(server, SMTP_MAX_SERVERNAME_LEN+1);
+    /* strlen: returns length WITHOUT terminating 0 byte */
+    len = strlen(server);
   }
   if (len > SMTP_MAX_SERVERNAME_LEN) {
     return ERR_MEM;
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_asn1.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_asn1.c
index 6df34dbd60..6df34dbd60 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_asn1.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_asn1.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_asn1.h b/components/net/lwip-2.1.2/src/apps/snmp/snmp_asn1.h
index 87c0973fdf..87c0973fdf 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_asn1.h
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_asn1.h
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_core.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_core.c
index 987f1066fc..987f1066fc 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_core.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_core.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_core_priv.h b/components/net/lwip-2.1.2/src/apps/snmp/snmp_core_priv.h
index 9532c05e4d..9532c05e4d 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_core_priv.h
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_core_priv.h
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_mib2.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_mib2.c
index 3383e44e92..3383e44e92 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_mib2.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_mib2.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_mib2_icmp.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_mib2_icmp.c
index 033d229eee..033d229eee 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_mib2_icmp.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_mib2_icmp.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_mib2_interfaces.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_mib2_interfaces.c
index 5f12dd552d..5f12dd552d 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_mib2_interfaces.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_mib2_interfaces.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_mib2_ip.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_mib2_ip.c
index 6931049e7a..6931049e7a 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_mib2_ip.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_mib2_ip.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_mib2_snmp.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_mib2_snmp.c
index ca22e41636..ca22e41636 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_mib2_snmp.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_mib2_snmp.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_mib2_system.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_mib2_system.c
index 71c1c29c07..71c1c29c07 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_mib2_system.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_mib2_system.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_mib2_tcp.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_mib2_tcp.c
index 8a321f3f1e..8a321f3f1e 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_mib2_tcp.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_mib2_tcp.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_mib2_udp.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_mib2_udp.c
index d0bd5dec29..d0bd5dec29 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_mib2_udp.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_mib2_udp.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_msg.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_msg.c
index 0b6693a79d..0b6693a79d 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_msg.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_msg.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_msg.h b/components/net/lwip-2.1.2/src/apps/snmp/snmp_msg.h
index 903f08a2dc..903f08a2dc 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_msg.h
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_msg.h
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_netconn.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_netconn.c
index 8850acb502..8850acb502 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_netconn.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_netconn.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_pbuf_stream.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_pbuf_stream.c
index 42867fbbcd..42867fbbcd 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_pbuf_stream.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_pbuf_stream.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_pbuf_stream.h b/components/net/lwip-2.1.2/src/apps/snmp/snmp_pbuf_stream.h
index 682713f959..682713f959 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_pbuf_stream.h
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_pbuf_stream.h
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_raw.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_raw.c
index e203cb6949..e203cb6949 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_raw.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_raw.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_scalar.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_scalar.c
index 4c5b94020f..094f52fe91 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_scalar.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_scalar.c
@@ -193,28 +193,40 @@ snmp_scalar_array_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, st
 static s16_t
 snmp_scalar_array_get_value(struct snmp_node_instance *instance, void *value)
 {
+  s16_t result = -1;
   const struct snmp_scalar_array_node *array_node = (const struct snmp_scalar_array_node *)(const void *)instance->node;
   const struct snmp_scalar_array_node_def *array_node_def = (const struct snmp_scalar_array_node_def *)instance->reference.const_ptr;
 
-  return array_node->get_value(array_node_def, value);
+  if (array_node->get_value != NULL) {
+    result = array_node->get_value(array_node_def, value);
+  }
+  return result;
 }
 
 static snmp_err_t
 snmp_scalar_array_set_test(struct snmp_node_instance *instance, u16_t value_len, void *value)
 {
+  snmp_err_t result = SNMP_ERR_NOTWRITABLE;
   const struct snmp_scalar_array_node *array_node = (const struct snmp_scalar_array_node *)(const void *)instance->node;
   const struct snmp_scalar_array_node_def *array_node_def = (const struct snmp_scalar_array_node_def *)instance->reference.const_ptr;
 
-  return array_node->set_test(array_node_def, value_len, value);
+  if (array_node->set_test != NULL) {
+    result = array_node->set_test(array_node_def, value_len, value);
+  }
+  return result;
 }
 
 static snmp_err_t
 snmp_scalar_array_set_value(struct snmp_node_instance *instance, u16_t value_len, void *value)
 {
+  snmp_err_t result = SNMP_ERR_NOTWRITABLE;
   const struct snmp_scalar_array_node *array_node = (const struct snmp_scalar_array_node *)(const void *)instance->node;
   const struct snmp_scalar_array_node_def *array_node_def = (const struct snmp_scalar_array_node_def *)instance->reference.const_ptr;
 
-  return array_node->set_value(array_node_def, value_len, value);
+  if (array_node->set_value != NULL) {
+    result = array_node->set_value(array_node_def, value_len, value);
+  }
+  return result;
 }
 
 #endif /* LWIP_SNMP */
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_snmpv2_framework.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_snmpv2_framework.c
index a5611dbf7f..a5611dbf7f 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_snmpv2_framework.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_snmpv2_framework.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_snmpv2_usm.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_snmpv2_usm.c
index 7490c9c834..7490c9c834 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_snmpv2_usm.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_snmpv2_usm.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_table.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_table.c
index 4b77a47466..4b77a47466 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_table.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_table.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_threadsync.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_threadsync.c
index cfcfb27475..56d98862cc 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_threadsync.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_threadsync.c
@@ -55,7 +55,11 @@ threadsync_get_value_synced(void *ctx)
 {
   struct threadsync_data *call_data = (struct threadsync_data *)ctx;
 
-  call_data->retval.s16 = call_data->proxy_instance.get_value(&call_data->proxy_instance, call_data->arg1.value);
+  if (call_data->proxy_instance.get_value != NULL) {
+    call_data->retval.s16 = call_data->proxy_instance.get_value(&call_data->proxy_instance, call_data->arg1.value);
+  } else {
+    call_data->retval.s16 = -1;
+  }
 
   sys_sem_signal(&call_data->threadsync_node->instance->sem);
 }
@@ -76,7 +80,11 @@ threadsync_set_test_synced(void *ctx)
 {
   struct threadsync_data *call_data = (struct threadsync_data *)ctx;
 
-  call_data->retval.err = call_data->proxy_instance.set_test(&call_data->proxy_instance, call_data->arg2.len, call_data->arg1.value);
+  if (call_data->proxy_instance.set_test != NULL) {
+    call_data->retval.err = call_data->proxy_instance.set_test(&call_data->proxy_instance, call_data->arg2.len, call_data->arg1.value);
+  } else {
+    call_data->retval.err = SNMP_ERR_NOTWRITABLE;
+  }
 
   sys_sem_signal(&call_data->threadsync_node->instance->sem);
 }
@@ -98,7 +106,11 @@ threadsync_set_value_synced(void *ctx)
 {
   struct threadsync_data *call_data = (struct threadsync_data *)ctx;
 
-  call_data->retval.err = call_data->proxy_instance.set_value(&call_data->proxy_instance, call_data->arg2.len, call_data->arg1.value);
+  if (call_data->proxy_instance.set_value != NULL) {
+    call_data->retval.err = call_data->proxy_instance.set_value(&call_data->proxy_instance, call_data->arg2.len, call_data->arg1.value);
+  } else {
+    call_data->retval.err = SNMP_ERR_NOTWRITABLE;
+  }
 
   sys_sem_signal(&call_data->threadsync_node->instance->sem);
 }
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmp_traps.c b/components/net/lwip-2.1.2/src/apps/snmp/snmp_traps.c
index 3c9c817670..3c9c817670 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmp_traps.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmp_traps.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmpv3.c b/components/net/lwip-2.1.2/src/apps/snmp/snmpv3.c
index ed5a076c2e..ed5a076c2e 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmpv3.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmpv3.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmpv3_mbedtls.c b/components/net/lwip-2.1.2/src/apps/snmp/snmpv3_mbedtls.c
index 48c1a81fef..48c1a81fef 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmpv3_mbedtls.c
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmpv3_mbedtls.c
diff --git a/components/net/lwip-2.1.0/src/apps/snmp/snmpv3_priv.h b/components/net/lwip-2.1.2/src/apps/snmp/snmpv3_priv.h
index 323364c30d..323364c30d 100644
--- a/components/net/lwip-2.1.0/src/apps/snmp/snmpv3_priv.h
+++ b/components/net/lwip-2.1.2/src/apps/snmp/snmpv3_priv.h
diff --git a/components/net/lwip-2.1.0/src/apps/sntp/sntp.c b/components/net/lwip-2.1.2/src/apps/sntp/sntp.c
index b7ff56adce..b7ff56adce 100644
--- a/components/net/lwip-2.1.0/src/apps/sntp/sntp.c
+++ b/components/net/lwip-2.1.2/src/apps/sntp/sntp.c
diff --git a/components/net/lwip-2.1.0/src/apps/tftp/tftp_port.c b/components/net/lwip-2.1.2/src/apps/tftp/tftp_port.c
index 129cc7da17..129cc7da17 100644
--- a/components/net/lwip-2.1.0/src/apps/tftp/tftp_port.c
+++ b/components/net/lwip-2.1.2/src/apps/tftp/tftp_port.c
diff --git a/components/net/lwip-2.1.0/src/apps/tftp/tftp_server.c b/components/net/lwip-2.1.2/src/apps/tftp/tftp_server.c
index e3f15124af..e3f15124af 100644
--- a/components/net/lwip-2.1.0/src/apps/tftp/tftp_server.c
+++ b/components/net/lwip-2.1.2/src/apps/tftp/tftp_server.c
diff --git a/components/net/lwip-2.1.0/src/arch/include/arch/bpstruct.h b/components/net/lwip-2.1.2/src/arch/include/arch/bpstruct.h
index 74ead358fa..74ead358fa 100644
--- a/components/net/lwip-2.1.0/src/arch/include/arch/bpstruct.h
+++ b/components/net/lwip-2.1.2/src/arch/include/arch/bpstruct.h
diff --git a/components/net/lwip-2.1.0/src/arch/include/arch/cc.h b/components/net/lwip-2.1.2/src/arch/include/arch/cc.h
index 77a589276a..c1b4cf7d29 100644
--- a/components/net/lwip-2.1.0/src/arch/include/arch/cc.h
+++ b/components/net/lwip-2.1.2/src/arch/include/arch/cc.h
@@ -57,11 +57,9 @@
 			in arch.h has been assigned to another error code. */
 #define ESHUTDOWN 180
 #endif /* __CC_ARM/__IAR_SYSTEMS_ICC__ */
-#else
-#define LWIP_PROVIDE_ERRNO
-#endif
+#endif /* RT_USING_LIBC */
 
-#if defined(RT_USING_LIBC) || defined(RT_USING_MINILIBC)
+#if defined(RT_USING_LIBC) || defined(RT_USING_MINILIBC) || defined(RT_LIBC_USING_TIME)
 #include <sys/time.h>
 #define LWIP_TIMEVAL_PRIVATE	   0
 #else
diff --git a/components/net/lwip-2.1.0/src/arch/include/arch/epstruct.h b/components/net/lwip-2.1.2/src/arch/include/arch/epstruct.h
index f6390959ea..f6390959ea 100644
--- a/components/net/lwip-2.1.0/src/arch/include/arch/epstruct.h
+++ b/components/net/lwip-2.1.2/src/arch/include/arch/epstruct.h
diff --git a/components/net/lwip-2.1.0/src/arch/include/arch/perf.h b/components/net/lwip-2.1.2/src/arch/include/arch/perf.h
index 675f1f65dc..675f1f65dc 100644
--- a/components/net/lwip-2.1.0/src/arch/include/arch/perf.h
+++ b/components/net/lwip-2.1.2/src/arch/include/arch/perf.h
diff --git a/components/net/lwip-2.1.0/src/arch/include/arch/sys_arch.h b/components/net/lwip-2.1.2/src/arch/include/arch/sys_arch.h
index 9c7e2d26c0..1e97f8a5ac 100644
--- a/components/net/lwip-2.1.0/src/arch/include/arch/sys_arch.h
+++ b/components/net/lwip-2.1.2/src/arch/include/arch/sys_arch.h
@@ -1,33 +1,33 @@
 /*
  * Copyright (c) 2001, Swedish Institute of Computer Science.
- * All rights reserved. 
+ * All rights reserved.
  *
- * Redistribution and use in source and binary forms, with or without 
- * modification, are permitted provided that the following conditions 
- * are met: 
- * 1. Redistributions of source code must retain the above copyright 
- *    notice, this list of conditions and the following disclaimer. 
- * 2. Redistributions in binary form must reproduce the above copyright 
- *    notice, this list of conditions and the following disclaimer in the 
- *    documentation and/or other materials provided with the distribution. 
- * 3. Neither the name of the Institute nor the names of its contributors 
- *    may be used to endorse or promote products derived from this software 
- *    without specific prior written permission. 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
  *
- * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
- * SUCH DAMAGE. 
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
  *
  * This file is part of the lwIP TCP/IP stack.
- * 
+ *
  * Author: Adam Dunkels <[email protected]>
  *
  * $Id: sys_arch.h,v 1.3 2005/03/13 16:03:23 bear Exp $
@@ -59,6 +59,6 @@ typedef rt_mutex_t sys_mutex_t;
 typedef rt_mailbox_t  sys_mbox_t;
 typedef rt_thread_t sys_thread_t;
 
-err_t sys_mbox_trypost_fromisr(sys_mbox_t *q, void *msg);
+// err_t sys_mbox_trypost_fromisr(sys_mbox_t *q, void *msg);
 
 #endif /* __ARCH_SYS_ARCH_H__ */
diff --git a/components/net/lwip-2.1.0/src/arch/sys_arch.c b/components/net/lwip-2.1.2/src/arch/sys_arch.c
index 0633501bb6..0633501bb6 100755..100644
--- a/components/net/lwip-2.1.0/src/arch/sys_arch.c
+++ b/components/net/lwip-2.1.2/src/arch/sys_arch.c
diff --git a/components/net/lwip-2.1.0/src/core/altcp.c b/components/net/lwip-2.1.2/src/core/altcp.c
index d46d6cdb1d..d46d6cdb1d 100644
--- a/components/net/lwip-2.1.0/src/core/altcp.c
+++ b/components/net/lwip-2.1.2/src/core/altcp.c
diff --git a/components/net/lwip-2.1.0/src/core/altcp_alloc.c b/components/net/lwip-2.1.2/src/core/altcp_alloc.c
index cd619bc1b1..cd619bc1b1 100644
--- a/components/net/lwip-2.1.0/src/core/altcp_alloc.c
+++ b/components/net/lwip-2.1.2/src/core/altcp_alloc.c
diff --git a/components/net/lwip-2.1.0/src/core/altcp_tcp.c b/components/net/lwip-2.1.2/src/core/altcp_tcp.c
index b715f04570..b715f04570 100644
--- a/components/net/lwip-2.1.0/src/core/altcp_tcp.c
+++ b/components/net/lwip-2.1.2/src/core/altcp_tcp.c
diff --git a/components/net/lwip-2.1.0/src/core/def.c b/components/net/lwip-2.1.2/src/core/def.c
index 9da36fee8a..9da36fee8a 100644
--- a/components/net/lwip-2.1.0/src/core/def.c
+++ b/components/net/lwip-2.1.2/src/core/def.c
diff --git a/components/net/lwip-2.1.0/src/core/dns.c b/components/net/lwip-2.1.2/src/core/dns.c
index c688cb2205..c688cb2205 100644
--- a/components/net/lwip-2.1.0/src/core/dns.c
+++ b/components/net/lwip-2.1.2/src/core/dns.c
diff --git a/components/net/lwip-2.1.0/src/core/inet_chksum.c b/components/net/lwip-2.1.2/src/core/inet_chksum.c
index 818c68f450..818c68f450 100644
--- a/components/net/lwip-2.1.0/src/core/inet_chksum.c
+++ b/components/net/lwip-2.1.2/src/core/inet_chksum.c
diff --git a/components/net/lwip-2.1.0/src/core/init.c b/components/net/lwip-2.1.2/src/core/init.c
index b3737a356d..b3737a356d 100644
--- a/components/net/lwip-2.1.0/src/core/init.c
+++ b/components/net/lwip-2.1.2/src/core/init.c
diff --git a/components/net/lwip-2.1.0/src/core/ip.c b/components/net/lwip-2.1.2/src/core/ip.c
index 18514cf32c..18514cf32c 100644
--- a/components/net/lwip-2.1.0/src/core/ip.c
+++ b/components/net/lwip-2.1.2/src/core/ip.c
diff --git a/components/net/lwip-2.1.0/src/core/ipv4/autoip.c b/components/net/lwip-2.1.2/src/core/ipv4/autoip.c
index 9f7139bc66..9f7139bc66 100644
--- a/components/net/lwip-2.1.0/src/core/ipv4/autoip.c
+++ b/components/net/lwip-2.1.2/src/core/ipv4/autoip.c
diff --git a/components/net/lwip-2.1.0/src/core/ipv4/dhcp.c b/components/net/lwip-2.1.2/src/core/ipv4/dhcp.c
index 534574feac..534574feac 100644
--- a/components/net/lwip-2.1.0/src/core/ipv4/dhcp.c
+++ b/components/net/lwip-2.1.2/src/core/ipv4/dhcp.c
diff --git a/components/net/lwip-2.1.0/src/core/ipv4/etharp.c b/components/net/lwip-2.1.2/src/core/ipv4/etharp.c
index 442aac08aa..442aac08aa 100644
--- a/components/net/lwip-2.1.0/src/core/ipv4/etharp.c
+++ b/components/net/lwip-2.1.2/src/core/ipv4/etharp.c
diff --git a/components/net/lwip-2.1.0/src/core/ipv4/icmp.c b/components/net/lwip-2.1.2/src/core/ipv4/icmp.c
index a462ccd34c..a462ccd34c 100644
--- a/components/net/lwip-2.1.0/src/core/ipv4/icmp.c
+++ b/components/net/lwip-2.1.2/src/core/ipv4/icmp.c
diff --git a/components/net/lwip-2.1.0/src/core/ipv4/igmp.c b/components/net/lwip-2.1.2/src/core/ipv4/igmp.c
index b655aa3a4c..b655aa3a4c 100644
--- a/components/net/lwip-2.1.0/src/core/ipv4/igmp.c
+++ b/components/net/lwip-2.1.2/src/core/ipv4/igmp.c
diff --git a/components/net/lwip-2.1.0/src/core/ipv4/ip4.c b/components/net/lwip-2.1.2/src/core/ipv4/ip4.c
index ed8ebe33ab..26c26a91a4 100644
--- a/components/net/lwip-2.1.0/src/core/ipv4/ip4.c
+++ b/components/net/lwip-2.1.2/src/core/ipv4/ip4.c
@@ -214,7 +214,7 @@ ip4_route(const ip4_addr_t *dest)
 #endif /* !LWIP_SINGLE_NETIF */
 
   if ((netif_default == NULL) || !netif_is_up(netif_default) || !netif_is_link_up(netif_default) ||
-      ip4_addr_isany_val(*netif_ip4_addr(netif_default))) {
+      ip4_addr_isany_val(*netif_ip4_addr(netif_default)) || ip4_addr_isloopback(dest)) {
     /* No matching netif found and default netif is not usable.
        If this is not good enough for you, use LWIP_HOOK_IP4_ROUTE() */
     LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_LEVEL_SERIOUS, ("ip4_route: No route to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
diff --git a/components/net/lwip-2.1.0/src/core/ipv4/ip4_addr.c b/components/net/lwip-2.1.2/src/core/ipv4/ip4_addr.c
index 33204d1141..33204d1141 100644
--- a/components/net/lwip-2.1.0/src/core/ipv4/ip4_addr.c
+++ b/components/net/lwip-2.1.2/src/core/ipv4/ip4_addr.c
diff --git a/components/net/lwip-2.1.0/src/core/ipv4/ip4_frag.c b/components/net/lwip-2.1.2/src/core/ipv4/ip4_frag.c
index a445530e04..a445530e04 100644
--- a/components/net/lwip-2.1.0/src/core/ipv4/ip4_frag.c
+++ b/components/net/lwip-2.1.2/src/core/ipv4/ip4_frag.c
diff --git a/components/net/lwip-2.1.0/src/core/ipv6/dhcp6.c b/components/net/lwip-2.1.2/src/core/ipv6/dhcp6.c
index 7cf98a5219..7cf98a5219 100644
--- a/components/net/lwip-2.1.0/src/core/ipv6/dhcp6.c
+++ b/components/net/lwip-2.1.2/src/core/ipv6/dhcp6.c
diff --git a/components/net/lwip-2.1.0/src/core/ipv6/ethip6.c b/components/net/lwip-2.1.2/src/core/ipv6/ethip6.c
index fec8b28a9d..fec8b28a9d 100644
--- a/components/net/lwip-2.1.0/src/core/ipv6/ethip6.c
+++ b/components/net/lwip-2.1.2/src/core/ipv6/ethip6.c
diff --git a/components/net/lwip-2.1.0/src/core/ipv6/icmp6.c b/components/net/lwip-2.1.2/src/core/ipv6/icmp6.c
index 167738a051..167738a051 100644
--- a/components/net/lwip-2.1.0/src/core/ipv6/icmp6.c
+++ b/components/net/lwip-2.1.2/src/core/ipv6/icmp6.c
diff --git a/components/net/lwip-2.1.0/src/core/ipv6/inet6.c b/components/net/lwip-2.1.2/src/core/ipv6/inet6.c
index d9a992c22a..d9a992c22a 100644
--- a/components/net/lwip-2.1.0/src/core/ipv6/inet6.c
+++ b/components/net/lwip-2.1.2/src/core/ipv6/inet6.c
diff --git a/components/net/lwip-2.1.0/src/core/ipv6/ip6.c b/components/net/lwip-2.1.2/src/core/ipv6/ip6.c
index eda11dc882..eda11dc882 100644
--- a/components/net/lwip-2.1.0/src/core/ipv6/ip6.c
+++ b/components/net/lwip-2.1.2/src/core/ipv6/ip6.c
diff --git a/components/net/lwip-2.1.0/src/core/ipv6/ip6_addr.c b/components/net/lwip-2.1.2/src/core/ipv6/ip6_addr.c
index 687c02f76f..687c02f76f 100644
--- a/components/net/lwip-2.1.0/src/core/ipv6/ip6_addr.c
+++ b/components/net/lwip-2.1.2/src/core/ipv6/ip6_addr.c
diff --git a/components/net/lwip-2.1.0/src/core/ipv6/ip6_frag.c b/components/net/lwip-2.1.2/src/core/ipv6/ip6_frag.c
index d6c5d223c8..d6c5d223c8 100644
--- a/components/net/lwip-2.1.0/src/core/ipv6/ip6_frag.c
+++ b/components/net/lwip-2.1.2/src/core/ipv6/ip6_frag.c
diff --git a/components/net/lwip-2.1.0/src/core/ipv6/mld6.c b/components/net/lwip-2.1.2/src/core/ipv6/mld6.c
index 6387d468cc..6387d468cc 100644
--- a/components/net/lwip-2.1.0/src/core/ipv6/mld6.c
+++ b/components/net/lwip-2.1.2/src/core/ipv6/mld6.c
diff --git a/components/net/lwip-2.1.0/src/core/ipv6/nd6.c b/components/net/lwip-2.1.2/src/core/ipv6/nd6.c
index db0c132e48..db0c132e48 100644
--- a/components/net/lwip-2.1.0/src/core/ipv6/nd6.c
+++ b/components/net/lwip-2.1.2/src/core/ipv6/nd6.c
diff --git a/components/net/lwip-2.1.0/src/core/mem.c b/components/net/lwip-2.1.2/src/core/mem.c
index 315fb3c5d5..315fb3c5d5 100644
--- a/components/net/lwip-2.1.0/src/core/mem.c
+++ b/components/net/lwip-2.1.2/src/core/mem.c
diff --git a/components/net/lwip-2.1.0/src/core/memp.c b/components/net/lwip-2.1.2/src/core/memp.c
index 352ce5a551..352ce5a551 100644
--- a/components/net/lwip-2.1.0/src/core/memp.c
+++ b/components/net/lwip-2.1.2/src/core/memp.c
diff --git a/components/net/lwip-2.1.0/src/core/netif.c b/components/net/lwip-2.1.2/src/core/netif.c
index b2b4adf85b..b2b4adf85b 100644
--- a/components/net/lwip-2.1.0/src/core/netif.c
+++ b/components/net/lwip-2.1.2/src/core/netif.c
diff --git a/components/net/lwip-2.1.0/src/core/pbuf.c b/components/net/lwip-2.1.2/src/core/pbuf.c
index a209e0ca8f..a209e0ca8f 100644
--- a/components/net/lwip-2.1.0/src/core/pbuf.c
+++ b/components/net/lwip-2.1.2/src/core/pbuf.c
diff --git a/components/net/lwip-2.1.0/src/core/raw.c b/components/net/lwip-2.1.2/src/core/raw.c
index 3b34544b04..3b34544b04 100644
--- a/components/net/lwip-2.1.0/src/core/raw.c
+++ b/components/net/lwip-2.1.2/src/core/raw.c
diff --git a/components/net/lwip-2.1.0/src/core/stats.c b/components/net/lwip-2.1.2/src/core/stats.c
index 34e9b2709d..34e9b2709d 100644
--- a/components/net/lwip-2.1.0/src/core/stats.c
+++ b/components/net/lwip-2.1.2/src/core/stats.c
diff --git a/components/net/lwip-2.1.0/src/core/sys.c b/components/net/lwip-2.1.2/src/core/sys.c
index 5f08352bfb..5f08352bfb 100644
--- a/components/net/lwip-2.1.0/src/core/sys.c
+++ b/components/net/lwip-2.1.2/src/core/sys.c
diff --git a/components/net/lwip-2.1.0/src/core/tcp.c b/components/net/lwip-2.1.2/src/core/tcp.c
index dcf2495c91..bd7d64ec39 100644
--- a/components/net/lwip-2.1.0/src/core/tcp.c
+++ b/components/net/lwip-2.1.2/src/core/tcp.c
@@ -583,6 +583,7 @@ tcp_abandon(struct tcp_pcb *pcb, int reset)
     tcp_free(pcb);
   } else {
     int send_rst = 0;
+    u16_t local_port = 0;
     enum tcp_state last_state;
     seqno = pcb->snd_nxt;
     ackno = pcb->rcv_nxt;
@@ -597,6 +598,7 @@ tcp_abandon(struct tcp_pcb *pcb, int reset)
       }
     } else {
       send_rst = reset;
+      local_port = pcb->local_port;
       TCP_PCB_REMOVE_ACTIVE(pcb);
     }
     if (pcb->unacked != NULL) {
@@ -613,7 +615,7 @@ tcp_abandon(struct tcp_pcb *pcb, int reset)
     tcp_backlog_accepted(pcb);
     if (send_rst) {
       LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_abandon: sending RST\n"));
-      tcp_rst(pcb, seqno, ackno, &pcb->local_ip, &pcb->remote_ip, pcb->local_port, pcb->remote_port);
+      tcp_rst(pcb, seqno, ackno, &pcb->local_ip, &pcb->remote_ip, local_port, pcb->remote_port);
     }
     last_state = pcb->state;
     tcp_free(pcb);
@@ -966,6 +968,7 @@ void
 tcp_recved(struct tcp_pcb *pcb, u16_t len)
 {
   u32_t wnd_inflation;
+  tcpwnd_size_t rcv_wnd;
 
   LWIP_ASSERT_CORE_LOCKED();
 
@@ -975,19 +978,13 @@ tcp_recved(struct tcp_pcb *pcb, u16_t len)
   LWIP_ASSERT("don't call tcp_recved for listen-pcbs",
               pcb->state != LISTEN);
 
-  pcb->rcv_wnd = (tcpwnd_size_t)(pcb->rcv_wnd + len);
-  if (pcb->rcv_wnd > TCP_WND_MAX(pcb)) {
+  rcv_wnd = (tcpwnd_size_t)(pcb->rcv_wnd + len);
+  if ((rcv_wnd > TCP_WND_MAX(pcb)) || (rcv_wnd < pcb->rcv_wnd)) {
+    /* window got too big or tcpwnd_size_t overflow */
+    LWIP_DEBUGF(TCP_DEBUG, ("tcp_recved: window got too big or tcpwnd_size_t overflow\n"));
     pcb->rcv_wnd = TCP_WND_MAX(pcb);
-  } else if (pcb->rcv_wnd == 0) {
-    /* rcv_wnd overflowed */
-    if (TCP_STATE_IS_CLOSING(pcb->state)) {
-      /* In passive close, we allow this, since the FIN bit is added to rcv_wnd
-         by the stack itself, since it is not mandatory for an application
-         to call tcp_recved() for the FIN bit, but e.g. the netconn API does so. */
-      pcb->rcv_wnd = TCP_WND_MAX(pcb);
-    } else {
-      LWIP_ASSERT("tcp_recved: len wrapped rcv_wnd\n", 0);
-    }
+  } else  {
+    pcb->rcv_wnd = rcv_wnd;
   }
 
   wnd_inflation = tcp_update_rcv_ann_wnd(pcb);
@@ -1219,6 +1216,7 @@ tcp_slowtmr_start:
     LWIP_ASSERT("tcp_slowtmr: active pcb->state != TIME-WAIT\n", pcb->state != TIME_WAIT);
     if (pcb->last_timer == tcp_timer_ctr) {
       /* skip this pcb, we have already processed it */
+      prev = pcb;
       pcb = pcb->next;
       continue;
     }
diff --git a/components/net/lwip-2.1.0/src/core/tcp_in.c b/components/net/lwip-2.1.2/src/core/tcp_in.c
index 428a6f48da..428a6f48da 100644
--- a/components/net/lwip-2.1.0/src/core/tcp_in.c
+++ b/components/net/lwip-2.1.2/src/core/tcp_in.c
diff --git a/components/net/lwip-2.1.0/src/core/tcp_out.c b/components/net/lwip-2.1.2/src/core/tcp_out.c
index 724df1097c..724df1097c 100644
--- a/components/net/lwip-2.1.0/src/core/tcp_out.c
+++ b/components/net/lwip-2.1.2/src/core/tcp_out.c
diff --git a/components/net/lwip-2.1.0/src/core/timeouts.c b/components/net/lwip-2.1.2/src/core/timeouts.c
index f37acfec99..f37acfec99 100644
--- a/components/net/lwip-2.1.0/src/core/timeouts.c
+++ b/components/net/lwip-2.1.2/src/core/timeouts.c
diff --git a/components/net/lwip-2.1.0/src/core/udp.c b/components/net/lwip-2.1.2/src/core/udp.c
index 9d2cb4af7f..9d2cb4af7f 100644
--- a/components/net/lwip-2.1.0/src/core/udp.c
+++ b/components/net/lwip-2.1.2/src/core/udp.c
diff --git a/components/net/lwip-2.1.0/src/include/compat/posix/arpa/inet.h b/components/net/lwip-2.1.2/src/include/compat/posix/arpa/inet.h
index 0ed9baf3d9..0ed9baf3d9 100644
--- a/components/net/lwip-2.1.0/src/include/compat/posix/arpa/inet.h
+++ b/components/net/lwip-2.1.2/src/include/compat/posix/arpa/inet.h
diff --git a/components/net/lwip-2.1.0/src/include/compat/posix/net/if.h b/components/net/lwip-2.1.2/src/include/compat/posix/net/if.h
index 6b8e63a527..6b8e63a527 100644
--- a/components/net/lwip-2.1.0/src/include/compat/posix/net/if.h
+++ b/components/net/lwip-2.1.2/src/include/compat/posix/net/if.h
diff --git a/components/net/lwip-2.1.0/src/include/compat/posix/netdb.h b/components/net/lwip-2.1.2/src/include/compat/posix/netdb.h
index 12d4c7f566..12d4c7f566 100644
--- a/components/net/lwip-2.1.0/src/include/compat/posix/netdb.h
+++ b/components/net/lwip-2.1.2/src/include/compat/posix/netdb.h
diff --git a/components/net/lwip-2.1.0/src/include/compat/posix/sys/socket.h b/components/net/lwip-2.1.2/src/include/compat/posix/sys/socket.h
index 0ed9baf3d9..0ed9baf3d9 100644
--- a/components/net/lwip-2.1.0/src/include/compat/posix/sys/socket.h
+++ b/components/net/lwip-2.1.2/src/include/compat/posix/sys/socket.h
diff --git a/components/net/lwip-2.1.0/src/include/compat/stdc/errno.h b/components/net/lwip-2.1.2/src/include/compat/stdc/errno.h
index 98a9aec996..98a9aec996 100644
--- a/components/net/lwip-2.1.0/src/include/compat/stdc/errno.h
+++ b/components/net/lwip-2.1.2/src/include/compat/stdc/errno.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/altcp.h b/components/net/lwip-2.1.2/src/include/lwip/altcp.h
index 97abc54d05..97abc54d05 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/altcp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/altcp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/altcp_tcp.h b/components/net/lwip-2.1.2/src/include/lwip/altcp_tcp.h
index dbde584683..dbde584683 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/altcp_tcp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/altcp_tcp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/altcp_tls.h b/components/net/lwip-2.1.2/src/include/lwip/altcp_tls.h
index 7b17c60803..7b17c60803 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/altcp_tls.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/altcp_tls.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/api.h b/components/net/lwip-2.1.2/src/include/lwip/api.h
index c2afaf26d3..c2afaf26d3 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/api.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/api.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/FILES b/components/net/lwip-2.1.2/src/include/lwip/apps/FILES
index adfc0f3345..adfc0f3345 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/FILES
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/FILES
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/altcp_proxyconnect.h b/components/net/lwip-2.1.2/src/include/lwip/apps/altcp_proxyconnect.h
index 65d31279de..65d31279de 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/altcp_proxyconnect.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/altcp_proxyconnect.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/altcp_tls_mbedtls_opts.h b/components/net/lwip-2.1.2/src/include/lwip/apps/altcp_tls_mbedtls_opts.h
index 36cddd93fe..36cddd93fe 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/altcp_tls_mbedtls_opts.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/altcp_tls_mbedtls_opts.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/fs.h b/components/net/lwip-2.1.2/src/include/lwip/apps/fs.h
index 67b9a60a9c..67b9a60a9c 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/fs.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/fs.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/http_client.h b/components/net/lwip-2.1.2/src/include/lwip/apps/http_client.h
index 8a0630833f..8a0630833f 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/http_client.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/http_client.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/httpd.h b/components/net/lwip-2.1.2/src/include/lwip/apps/httpd.h
index e872429f2e..e872429f2e 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/httpd.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/httpd.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/httpd_opts.h b/components/net/lwip-2.1.2/src/include/lwip/apps/httpd_opts.h
index 8723961fd4..8723961fd4 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/httpd_opts.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/httpd_opts.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/lwiperf.h b/components/net/lwip-2.1.2/src/include/lwip/apps/lwiperf.h
index cc86e7f878..cc86e7f878 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/lwiperf.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/lwiperf.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/mdns.h b/components/net/lwip-2.1.2/src/include/lwip/apps/mdns.h
index 20d7ee2a26..20d7ee2a26 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/mdns.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/mdns.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/mdns_opts.h b/components/net/lwip-2.1.2/src/include/lwip/apps/mdns_opts.h
index 45f2c50cac..45f2c50cac 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/mdns_opts.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/mdns_opts.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/mdns_priv.h b/components/net/lwip-2.1.2/src/include/lwip/apps/mdns_priv.h
index 9635b5b106..9635b5b106 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/mdns_priv.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/mdns_priv.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/mqtt.h b/components/net/lwip-2.1.2/src/include/lwip/apps/mqtt.h
index c2bb2288f4..c2bb2288f4 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/mqtt.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/mqtt.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/mqtt_opts.h b/components/net/lwip-2.1.2/src/include/lwip/apps/mqtt_opts.h
index 4226d21e84..4226d21e84 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/mqtt_opts.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/mqtt_opts.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/mqtt_priv.h b/components/net/lwip-2.1.2/src/include/lwip/apps/mqtt_priv.h
index b775913cac..b775913cac 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/mqtt_priv.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/mqtt_priv.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/netbiosns.h b/components/net/lwip-2.1.2/src/include/lwip/apps/netbiosns.h
index a326d33b11..a326d33b11 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/netbiosns.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/netbiosns.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/netbiosns_opts.h b/components/net/lwip-2.1.2/src/include/lwip/apps/netbiosns_opts.h
index 1f51ab02a0..1f51ab02a0 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/netbiosns_opts.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/netbiosns_opts.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/smtp.h b/components/net/lwip-2.1.2/src/include/lwip/apps/smtp.h
index fb4a4a7cca..fb4a4a7cca 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/smtp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/smtp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/smtp_opts.h b/components/net/lwip-2.1.2/src/include/lwip/apps/smtp_opts.h
index bc743f679e..bc743f679e 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/smtp_opts.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/smtp_opts.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp.h b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp.h
index a3f8eb1508..a3f8eb1508 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp_core.h b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp_core.h
index 6021c72220..6021c72220 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp_core.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp_core.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp_mib2.h b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp_mib2.h
index 2f4a68935e..2f4a68935e 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp_mib2.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp_mib2.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp_opts.h b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp_opts.h
index c892d22afa..c892d22afa 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp_opts.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp_opts.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp_scalar.h b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp_scalar.h
index 40a060c640..40a060c640 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp_scalar.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp_scalar.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp_snmpv2_framework.h b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp_snmpv2_framework.h
index 47409cc201..47409cc201 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp_snmpv2_framework.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp_snmpv2_framework.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp_snmpv2_usm.h b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp_snmpv2_usm.h
index 88cfcd8ebe..88cfcd8ebe 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp_snmpv2_usm.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp_snmpv2_usm.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp_table.h b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp_table.h
index 4988b51c25..4988b51c25 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp_table.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp_table.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp_threadsync.h b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp_threadsync.h
index a25dbf2d0f..a25dbf2d0f 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/snmp_threadsync.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/snmp_threadsync.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/snmpv3.h b/components/net/lwip-2.1.2/src/include/lwip/apps/snmpv3.h
index e0dda6499b..e0dda6499b 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/snmpv3.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/snmpv3.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/sntp.h b/components/net/lwip-2.1.2/src/include/lwip/apps/sntp.h
index 3c0f95f728..3c0f95f728 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/sntp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/sntp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/sntp_opts.h b/components/net/lwip-2.1.2/src/include/lwip/apps/sntp_opts.h
index ed98040fea..ed98040fea 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/sntp_opts.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/sntp_opts.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/tftp_opts.h b/components/net/lwip-2.1.2/src/include/lwip/apps/tftp_opts.h
index 198f632b68..198f632b68 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/tftp_opts.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/tftp_opts.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/apps/tftp_server.h b/components/net/lwip-2.1.2/src/include/lwip/apps/tftp_server.h
index 0a7fbee02a..0a7fbee02a 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/apps/tftp_server.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/apps/tftp_server.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/arch.h b/components/net/lwip-2.1.2/src/include/lwip/arch.h
index 58dae33aa1..1606d4faab 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/arch.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/arch.h
@@ -196,7 +196,9 @@ typedef uintptr_t mem_ptr_t;
 #define LWIP_NO_UNISTD_H 0
 #endif
 #if !LWIP_NO_UNISTD_H
-#include <unistd.h>
+#include "sys/types.h"
+#else
+typedef int ssize_t;
 #endif
 #else /* SSIZE_MAX */
 typedef int ssize_t;
diff --git a/components/net/lwip-2.1.0/src/include/lwip/autoip.h b/components/net/lwip-2.1.2/src/include/lwip/autoip.h
index 1d85bccff8..1d85bccff8 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/autoip.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/autoip.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/debug.h b/components/net/lwip-2.1.2/src/include/lwip/debug.h
index baa6a40901..baa6a40901 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/debug.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/debug.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/def.h b/components/net/lwip-2.1.2/src/include/lwip/def.h
index 3d6e107e32..dfb266d181 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/def.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/def.h
@@ -83,14 +83,14 @@ extern "C" {
 #endif
 
 #if BYTE_ORDER == BIG_ENDIAN
-#define lwip_htons(x) (x)
-#define lwip_ntohs(x) (x)
-#define lwip_htonl(x) (x)
-#define lwip_ntohl(x) (x)
-#define PP_HTONS(x) (x)
-#define PP_NTOHS(x) (x)
-#define PP_HTONL(x) (x)
-#define PP_NTOHL(x) (x)
+#define lwip_htons(x) ((u16_t)(x))
+#define lwip_ntohs(x) ((u16_t)(x))
+#define lwip_htonl(x) ((u32_t)(x))
+#define lwip_ntohl(x) ((u32_t)(x))
+#define PP_HTONS(x)   ((u16_t)(x))
+#define PP_NTOHS(x)   ((u16_t)(x))
+#define PP_HTONL(x)   ((u32_t)(x))
+#define PP_NTOHL(x)   ((u32_t)(x))
 #else /* BYTE_ORDER != BIG_ENDIAN */
 #ifndef lwip_htons
 u16_t lwip_htons(u16_t x);
diff --git a/components/net/lwip-2.1.0/src/include/lwip/dhcp.h b/components/net/lwip-2.1.2/src/include/lwip/dhcp.h
index c78aa0bafa..c78aa0bafa 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/dhcp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/dhcp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/dhcp6.h b/components/net/lwip-2.1.2/src/include/lwip/dhcp6.h
index 5cc4a01591..5cc4a01591 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/dhcp6.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/dhcp6.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/dns.h b/components/net/lwip-2.1.2/src/include/lwip/dns.h
index 091341544f..091341544f 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/dns.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/dns.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/err.h b/components/net/lwip-2.1.2/src/include/lwip/err.h
index 7773098770..887d9b3fd8 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/err.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/err.h
@@ -49,14 +49,6 @@ extern "C" {
  * @{
  */
 
-/** Define LWIP_ERR_T in cc.h if you want to use
- *  a different type for your platform (must be signed). */
-#ifdef LWIP_ERR_T
-typedef LWIP_ERR_T err_t;
-#else /* LWIP_ERR_T */
-typedef s8_t err_t;
-#endif /* LWIP_ERR_T*/
-
 /** Definitions for error constants. */
 typedef enum {
 /** No error, everything OK. */
@@ -96,6 +88,14 @@ typedef enum {
   ERR_ARG        = -16
 } err_enum_t;
 
+/** Define LWIP_ERR_T in cc.h if you want to use
+ *  a different type for your platform (must be signed). */
+#ifdef LWIP_ERR_T
+typedef LWIP_ERR_T err_t;
+#else /* LWIP_ERR_T */
+typedef s8_t err_t;
+#endif /* LWIP_ERR_T*/
+
 /**
  * @}
  */
diff --git a/components/net/lwip-2.1.0/src/include/lwip/errno.h b/components/net/lwip-2.1.2/src/include/lwip/errno.h
index 48d6b539d8..48d6b539d8 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/errno.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/errno.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/etharp.h b/components/net/lwip-2.1.2/src/include/lwip/etharp.h
index 2036b2464a..2036b2464a 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/etharp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/etharp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/ethip6.h b/components/net/lwip-2.1.2/src/include/lwip/ethip6.h
index 5e88dffd05..5e88dffd05 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/ethip6.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/ethip6.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/icmp.h b/components/net/lwip-2.1.2/src/include/lwip/icmp.h
index f5a31fd4c0..f5a31fd4c0 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/icmp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/icmp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/icmp6.h b/components/net/lwip-2.1.2/src/include/lwip/icmp6.h
index 0ccb78994d..0ccb78994d 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/icmp6.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/icmp6.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/if_api.h b/components/net/lwip-2.1.2/src/include/lwip/if_api.h
index 39017abd32..39017abd32 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/if_api.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/if_api.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/igmp.h b/components/net/lwip-2.1.2/src/include/lwip/igmp.h
index ffd80e680c..ffd80e680c 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/igmp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/igmp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/inet.h b/components/net/lwip-2.1.2/src/include/lwip/inet.h
index 2982a0f4b1..2982a0f4b1 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/inet.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/inet.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/inet_chksum.h b/components/net/lwip-2.1.2/src/include/lwip/inet_chksum.h
index 76893ef52f..76893ef52f 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/inet_chksum.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/inet_chksum.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/init.h b/components/net/lwip-2.1.2/src/include/lwip/init.h
index 41f1f2f7a0..b2c385c3bb 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/init.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/init.h
@@ -54,7 +54,7 @@ extern "C" {
 /** x.X.x: Minor version of the stack */
 #define LWIP_VERSION_MINOR      1U
 /** x.x.X: Revision of the stack */
-#define LWIP_VERSION_REVISION   0U
+#define LWIP_VERSION_REVISION   2U
 /** For release candidates, this is set to 1..254
   * For official releases, this is set to 255 (LWIP_RC_RELEASE)
   * For development versions (Git), this is set to 0 (LWIP_RC_DEVELOPMENT) */
diff --git a/components/net/lwip-2.1.0/src/include/lwip/init.h.cmake.in b/components/net/lwip-2.1.2/src/include/lwip/init.h.cmake.in
index 9b609b7426..9b609b7426 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/init.h.cmake.in
+++ b/components/net/lwip-2.1.2/src/include/lwip/init.h.cmake.in
diff --git a/components/net/lwip-2.1.0/src/include/lwip/ip.h b/components/net/lwip-2.1.2/src/include/lwip/ip.h
index 653c3b2f4f..653c3b2f4f 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/ip.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/ip.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/ip4.h b/components/net/lwip-2.1.2/src/include/lwip/ip4.h
index fd35a33692..fd35a33692 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/ip4.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/ip4.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/ip4_addr.h b/components/net/lwip-2.1.2/src/include/lwip/ip4_addr.h
index f244c4f54f..f244c4f54f 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/ip4_addr.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/ip4_addr.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/ip4_frag.h b/components/net/lwip-2.1.2/src/include/lwip/ip4_frag.h
index ed5bf14a31..ed5bf14a31 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/ip4_frag.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/ip4_frag.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/ip6.h b/components/net/lwip-2.1.2/src/include/lwip/ip6.h
index f894e063ef..f894e063ef 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/ip6.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/ip6.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/ip6_addr.h b/components/net/lwip-2.1.2/src/include/lwip/ip6_addr.h
index 29c2a34d9e..29c2a34d9e 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/ip6_addr.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/ip6_addr.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/ip6_frag.h b/components/net/lwip-2.1.2/src/include/lwip/ip6_frag.h
index 87e0e86a67..87e0e86a67 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/ip6_frag.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/ip6_frag.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/ip6_zone.h b/components/net/lwip-2.1.2/src/include/lwip/ip6_zone.h
index 525790e67d..525790e67d 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/ip6_zone.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/ip6_zone.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/ip_addr.h b/components/net/lwip-2.1.2/src/include/lwip/ip_addr.h
index 2f977709d1..2f977709d1 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/ip_addr.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/ip_addr.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/mem.h b/components/net/lwip-2.1.2/src/include/lwip/mem.h
index ff208d25c3..ff208d25c3 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/mem.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/mem.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/memp.h b/components/net/lwip-2.1.2/src/include/lwip/memp.h
index 1630b26c2c..1630b26c2c 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/memp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/memp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/mld6.h b/components/net/lwip-2.1.2/src/include/lwip/mld6.h
index 7fa0797f27..7fa0797f27 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/mld6.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/mld6.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/nd6.h b/components/net/lwip-2.1.2/src/include/lwip/nd6.h
index c30e624f02..c30e624f02 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/nd6.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/nd6.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/netbuf.h b/components/net/lwip-2.1.2/src/include/lwip/netbuf.h
index 42a911bca3..42a911bca3 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/netbuf.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/netbuf.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/netdb.h b/components/net/lwip-2.1.2/src/include/lwip/netdb.h
index d3d15dfac5..d3d15dfac5 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/netdb.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/netdb.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/netif.h b/components/net/lwip-2.1.2/src/include/lwip/netif.h
index 911196ab3d..911196ab3d 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/netif.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/netif.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/netifapi.h b/components/net/lwip-2.1.2/src/include/lwip/netifapi.h
index e0631791b9..e0631791b9 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/netifapi.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/netifapi.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/opt.h b/components/net/lwip-2.1.2/src/include/lwip/opt.h
index 82c420c167..82c420c167 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/opt.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/opt.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/pbuf.h b/components/net/lwip-2.1.2/src/include/lwip/pbuf.h
index 82902a4e98..82902a4e98 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/pbuf.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/pbuf.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/priv/altcp_priv.h b/components/net/lwip-2.1.2/src/include/lwip/priv/altcp_priv.h
index 2d3b2fdbce..2d3b2fdbce 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/priv/altcp_priv.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/priv/altcp_priv.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/priv/api_msg.h b/components/net/lwip-2.1.2/src/include/lwip/priv/api_msg.h
index 9e8ffc9ea6..9e8ffc9ea6 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/priv/api_msg.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/priv/api_msg.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/priv/mem_priv.h b/components/net/lwip-2.1.2/src/include/lwip/priv/mem_priv.h
index 8630d75419..8630d75419 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/priv/mem_priv.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/priv/mem_priv.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/priv/memp_priv.h b/components/net/lwip-2.1.2/src/include/lwip/priv/memp_priv.h
index 1f14cb162b..1f14cb162b 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/priv/memp_priv.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/priv/memp_priv.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/priv/memp_std.h b/components/net/lwip-2.1.2/src/include/lwip/priv/memp_std.h
index 669ad4d7e6..669ad4d7e6 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/priv/memp_std.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/priv/memp_std.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/priv/nd6_priv.h b/components/net/lwip-2.1.2/src/include/lwip/priv/nd6_priv.h
index cc3007d972..cc3007d972 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/priv/nd6_priv.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/priv/nd6_priv.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/priv/raw_priv.h b/components/net/lwip-2.1.2/src/include/lwip/priv/raw_priv.h
index d4561d4f32..d4561d4f32 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/priv/raw_priv.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/priv/raw_priv.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/priv/sockets_priv.h b/components/net/lwip-2.1.2/src/include/lwip/priv/sockets_priv.h
index 9193fa0c1b..9193fa0c1b 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/priv/sockets_priv.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/priv/sockets_priv.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/priv/tcp_priv.h b/components/net/lwip-2.1.2/src/include/lwip/priv/tcp_priv.h
index 72f9126d46..72f9126d46 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/priv/tcp_priv.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/priv/tcp_priv.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/priv/tcpip_priv.h b/components/net/lwip-2.1.2/src/include/lwip/priv/tcpip_priv.h
index 74be634be0..74be634be0 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/priv/tcpip_priv.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/priv/tcpip_priv.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/autoip.h b/components/net/lwip-2.1.2/src/include/lwip/prot/autoip.h
index fd3af8a9fc..fd3af8a9fc 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/autoip.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/autoip.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/dhcp.h b/components/net/lwip-2.1.2/src/include/lwip/prot/dhcp.h
index ab18dca313..ab18dca313 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/dhcp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/dhcp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/dhcp6.h b/components/net/lwip-2.1.2/src/include/lwip/prot/dhcp6.h
index 0754c91b9b..0754c91b9b 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/dhcp6.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/dhcp6.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/dns.h b/components/net/lwip-2.1.2/src/include/lwip/prot/dns.h
index 94782d6e9c..94782d6e9c 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/dns.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/dns.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/etharp.h b/components/net/lwip-2.1.2/src/include/lwip/prot/etharp.h
index 811c228417..811c228417 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/etharp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/etharp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/ethernet.h b/components/net/lwip-2.1.2/src/include/lwip/prot/ethernet.h
index 309e57465d..309e57465d 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/ethernet.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/ethernet.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/iana.h b/components/net/lwip-2.1.2/src/include/lwip/prot/iana.h
index 32890cccd3..32890cccd3 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/iana.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/iana.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/icmp.h b/components/net/lwip-2.1.2/src/include/lwip/prot/icmp.h
index 7d19385c72..7d19385c72 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/icmp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/icmp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/icmp6.h b/components/net/lwip-2.1.2/src/include/lwip/prot/icmp6.h
index 3461120421..3461120421 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/icmp6.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/icmp6.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/ieee.h b/components/net/lwip-2.1.2/src/include/lwip/prot/ieee.h
index db865635be..db865635be 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/ieee.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/ieee.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/igmp.h b/components/net/lwip-2.1.2/src/include/lwip/prot/igmp.h
index 46b81a9dd3..46b81a9dd3 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/igmp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/igmp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/ip.h b/components/net/lwip-2.1.2/src/include/lwip/prot/ip.h
index 223158f5ac..223158f5ac 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/ip.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/ip.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/ip4.h b/components/net/lwip-2.1.2/src/include/lwip/prot/ip4.h
index 9347461154..9347461154 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/ip4.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/ip4.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/ip6.h b/components/net/lwip-2.1.2/src/include/lwip/prot/ip6.h
index 0f6de45593..0f6de45593 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/ip6.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/ip6.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/mld6.h b/components/net/lwip-2.1.2/src/include/lwip/prot/mld6.h
index 71f1dcbdc5..71f1dcbdc5 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/mld6.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/mld6.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/nd6.h b/components/net/lwip-2.1.2/src/include/lwip/prot/nd6.h
index c270d07c13..c270d07c13 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/nd6.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/nd6.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/tcp.h b/components/net/lwip-2.1.2/src/include/lwip/prot/tcp.h
index c1d7de1faf..c1d7de1faf 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/tcp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/tcp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/prot/udp.h b/components/net/lwip-2.1.2/src/include/lwip/prot/udp.h
index 664f19a3e7..664f19a3e7 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/prot/udp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/prot/udp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/raw.h b/components/net/lwip-2.1.2/src/include/lwip/raw.h
index b129bd3b99..b129bd3b99 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/raw.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/raw.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/sio.h b/components/net/lwip-2.1.2/src/include/lwip/sio.h
index 7643e19569..7643e19569 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/sio.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/sio.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/snmp.h b/components/net/lwip-2.1.2/src/include/lwip/snmp.h
index 8704d0b4d2..8704d0b4d2 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/snmp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/snmp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/sockets.h b/components/net/lwip-2.1.2/src/include/lwip/sockets.h
index 12ffbddccc..12ffbddccc 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/sockets.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/sockets.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/stats.h b/components/net/lwip-2.1.2/src/include/lwip/stats.h
index b570dbacf5..b570dbacf5 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/stats.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/stats.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/sys.h b/components/net/lwip-2.1.2/src/include/lwip/sys.h
index 168e465baa..168e465baa 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/sys.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/sys.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/tcp.h b/components/net/lwip-2.1.2/src/include/lwip/tcp.h
index daf7599460..daf7599460 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/tcp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/tcp.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/tcpbase.h b/components/net/lwip-2.1.2/src/include/lwip/tcpbase.h
index 0023074655..0023074655 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/tcpbase.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/tcpbase.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/tcpip.h b/components/net/lwip-2.1.2/src/include/lwip/tcpip.h
index 0b8880a9fc..0b8880a9fc 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/tcpip.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/tcpip.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/timeouts.h b/components/net/lwip-2.1.2/src/include/lwip/timeouts.h
index b601f9eb34..b601f9eb34 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/timeouts.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/timeouts.h
diff --git a/components/net/lwip-2.1.0/src/include/lwip/udp.h b/components/net/lwip-2.1.2/src/include/lwip/udp.h
index b1c78e58d3..b1c78e58d3 100644
--- a/components/net/lwip-2.1.0/src/include/lwip/udp.h
+++ b/components/net/lwip-2.1.2/src/include/lwip/udp.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/bridgeif.h b/components/net/lwip-2.1.2/src/include/netif/bridgeif.h
index f4f8cf1440..f4f8cf1440 100644
--- a/components/net/lwip-2.1.0/src/include/netif/bridgeif.h
+++ b/components/net/lwip-2.1.2/src/include/netif/bridgeif.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/bridgeif_opts.h b/components/net/lwip-2.1.2/src/include/netif/bridgeif_opts.h
index b85c301749..b85c301749 100644
--- a/components/net/lwip-2.1.0/src/include/netif/bridgeif_opts.h
+++ b/components/net/lwip-2.1.2/src/include/netif/bridgeif_opts.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/etharp.h b/components/net/lwip-2.1.2/src/include/netif/etharp.h
index b536fd280f..b536fd280f 100644
--- a/components/net/lwip-2.1.0/src/include/netif/etharp.h
+++ b/components/net/lwip-2.1.2/src/include/netif/etharp.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ethernet.h b/components/net/lwip-2.1.2/src/include/netif/ethernet.h
index 49649cbf8b..49649cbf8b 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ethernet.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ethernet.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ethernetif.h b/components/net/lwip-2.1.2/src/include/netif/ethernetif.h
index 244bafdd1b..244bafdd1b 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ethernetif.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ethernetif.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ieee802154.h b/components/net/lwip-2.1.2/src/include/netif/ieee802154.h
index 54e019fd0a..54e019fd0a 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ieee802154.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ieee802154.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/lowpan6.h b/components/net/lwip-2.1.2/src/include/netif/lowpan6.h
index ecff24ba66..ecff24ba66 100644
--- a/components/net/lwip-2.1.0/src/include/netif/lowpan6.h
+++ b/components/net/lwip-2.1.2/src/include/netif/lowpan6.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/lowpan6_ble.h b/components/net/lwip-2.1.2/src/include/netif/lowpan6_ble.h
index 01896a7ff6..01896a7ff6 100644
--- a/components/net/lwip-2.1.0/src/include/netif/lowpan6_ble.h
+++ b/components/net/lwip-2.1.2/src/include/netif/lowpan6_ble.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/lowpan6_common.h b/components/net/lwip-2.1.2/src/include/netif/lowpan6_common.h
index 0dc13ab5bf..0dc13ab5bf 100644
--- a/components/net/lwip-2.1.0/src/include/netif/lowpan6_common.h
+++ b/components/net/lwip-2.1.2/src/include/netif/lowpan6_common.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/lowpan6_opts.h b/components/net/lwip-2.1.2/src/include/netif/lowpan6_opts.h
index 17d46cdcc5..17d46cdcc5 100644
--- a/components/net/lwip-2.1.0/src/include/netif/lowpan6_opts.h
+++ b/components/net/lwip-2.1.2/src/include/netif/lowpan6_opts.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/ccp.h b/components/net/lwip-2.1.2/src/include/netif/ppp/ccp.h
index b2285228b8..b2285228b8 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/ccp.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/ccp.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/chap-md5.h b/components/net/lwip-2.1.2/src/include/netif/ppp/chap-md5.h
index eb0269fe50..eb0269fe50 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/chap-md5.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/chap-md5.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/chap-new.h b/components/net/lwip-2.1.2/src/include/netif/ppp/chap-new.h
index 2d8cd9ca99..2d8cd9ca99 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/chap-new.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/chap-new.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/chap_ms.h b/components/net/lwip-2.1.2/src/include/netif/ppp/chap_ms.h
index 0795291158..0795291158 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/chap_ms.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/chap_ms.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/eap.h b/components/net/lwip-2.1.2/src/include/netif/ppp/eap.h
index 3ee9aaf81a..3ee9aaf81a 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/eap.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/eap.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/ecp.h b/components/net/lwip-2.1.2/src/include/netif/ppp/ecp.h
index d8808c3ab2..d8808c3ab2 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/ecp.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/ecp.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/eui64.h b/components/net/lwip-2.1.2/src/include/netif/ppp/eui64.h
index 5adeb482a8..5adeb482a8 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/eui64.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/eui64.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/fsm.h b/components/net/lwip-2.1.2/src/include/netif/ppp/fsm.h
index 8dec700e07..8dec700e07 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/fsm.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/fsm.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/ipcp.h b/components/net/lwip-2.1.2/src/include/netif/ppp/ipcp.h
index 32fdd1c641..32fdd1c641 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/ipcp.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/ipcp.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/ipv6cp.h b/components/net/lwip-2.1.2/src/include/netif/ppp/ipv6cp.h
index 9099973869..9099973869 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/ipv6cp.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/ipv6cp.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/lcp.h b/components/net/lwip-2.1.2/src/include/netif/ppp/lcp.h
index 18ad1cb23b..18ad1cb23b 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/lcp.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/lcp.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/magic.h b/components/net/lwip-2.1.2/src/include/netif/ppp/magic.h
index a165e18fa6..a165e18fa6 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/magic.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/magic.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/mppe.h b/components/net/lwip-2.1.2/src/include/netif/ppp/mppe.h
index 5de1128479..5de1128479 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/mppe.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/mppe.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/polarssl/arc4.h b/components/net/lwip-2.1.2/src/include/netif/ppp/polarssl/arc4.h
index 4af724cd90..4af724cd90 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/polarssl/arc4.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/polarssl/arc4.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/polarssl/des.h b/components/net/lwip-2.1.2/src/include/netif/ppp/polarssl/des.h
index e893890ed7..e893890ed7 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/polarssl/des.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/polarssl/des.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/polarssl/md4.h b/components/net/lwip-2.1.2/src/include/netif/ppp/polarssl/md4.h
index 570445687e..570445687e 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/polarssl/md4.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/polarssl/md4.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/polarssl/md5.h b/components/net/lwip-2.1.2/src/include/netif/ppp/polarssl/md5.h
index 1244011890..1244011890 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/polarssl/md5.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/polarssl/md5.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/polarssl/sha1.h b/components/net/lwip-2.1.2/src/include/netif/ppp/polarssl/sha1.h
index a4c53e07c5..a4c53e07c5 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/polarssl/sha1.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/polarssl/sha1.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/ppp.h b/components/net/lwip-2.1.2/src/include/netif/ppp/ppp.h
index 3d73c36570..3d73c36570 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/ppp.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/ppp.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/ppp_impl.h b/components/net/lwip-2.1.2/src/include/netif/ppp/ppp_impl.h
index 40843d5a0a..40843d5a0a 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/ppp_impl.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/ppp_impl.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/ppp_opts.h b/components/net/lwip-2.1.2/src/include/netif/ppp/ppp_opts.h
index 6702bec618..6702bec618 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/ppp_opts.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/ppp_opts.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/pppapi.h b/components/net/lwip-2.1.2/src/include/netif/ppp/pppapi.h
index 913d93f749..913d93f749 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/pppapi.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/pppapi.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/pppcrypt.h b/components/net/lwip-2.1.2/src/include/netif/ppp/pppcrypt.h
index c0230bbcb7..c0230bbcb7 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/pppcrypt.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/pppcrypt.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/pppdebug.h b/components/net/lwip-2.1.2/src/include/netif/ppp/pppdebug.h
index 36ee4f9bf9..36ee4f9bf9 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/pppdebug.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/pppdebug.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/pppoe.h b/components/net/lwip-2.1.2/src/include/netif/ppp/pppoe.h
index 08ab7ab54e..08ab7ab54e 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/pppoe.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/pppoe.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/pppol2tp.h b/components/net/lwip-2.1.2/src/include/netif/ppp/pppol2tp.h
index 1221ca15b7..1221ca15b7 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/pppol2tp.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/pppol2tp.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/pppos.h b/components/net/lwip-2.1.2/src/include/netif/ppp/pppos.h
index 380a965ce6..380a965ce6 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/pppos.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/pppos.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/upap.h b/components/net/lwip-2.1.2/src/include/netif/ppp/upap.h
index 540d981492..540d981492 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/upap.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/upap.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/ppp/vj.h b/components/net/lwip-2.1.2/src/include/netif/ppp/vj.h
index 77d9976c52..77d9976c52 100644
--- a/components/net/lwip-2.1.0/src/include/netif/ppp/vj.h
+++ b/components/net/lwip-2.1.2/src/include/netif/ppp/vj.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/slipif.h b/components/net/lwip-2.1.2/src/include/netif/slipif.h
index 65ba31f835..65ba31f835 100644
--- a/components/net/lwip-2.1.0/src/include/netif/slipif.h
+++ b/components/net/lwip-2.1.2/src/include/netif/slipif.h
diff --git a/components/net/lwip-2.1.0/src/include/netif/zepif.h b/components/net/lwip-2.1.2/src/include/netif/zepif.h
index 2a801b4c40..2a801b4c40 100644
--- a/components/net/lwip-2.1.0/src/include/netif/zepif.h
+++ b/components/net/lwip-2.1.2/src/include/netif/zepif.h
diff --git a/components/net/lwip-2.1.0/src/lwipopts.h b/components/net/lwip-2.1.2/src/lwipopts.h
index 7e02a8a9f9..220bb6fa41 100644
--- a/components/net/lwip-2.1.0/src/lwipopts.h
+++ b/components/net/lwip-2.1.2/src/lwipopts.h
@@ -236,6 +236,12 @@
 #  define SSIZE_MAX LONG_MAX
 # endif
 
+#ifdef RT_USING_LIBC
+#define LWIP_NO_UNISTD_H 0
+#else
+#define LWIP_NO_UNISTD_H 1
+#endif
+
 /* ---------- Memory options ---------- */
 #define MEM_ALIGNMENT               4
 #define MEMP_OVERFLOW_CHECK         1 ////
diff --git a/components/net/lwip-2.1.0/src/lwippools.h b/components/net/lwip-2.1.2/src/lwippools.h
index 6583863de3..6583863de3 100644
--- a/components/net/lwip-2.1.0/src/lwippools.h
+++ b/components/net/lwip-2.1.2/src/lwippools.h
diff --git a/components/net/lwip-2.1.0/src/netif/FILES b/components/net/lwip-2.1.2/src/netif/FILES
index 1ffd6f2d1d..1ffd6f2d1d 100644
--- a/components/net/lwip-2.1.0/src/netif/FILES
+++ b/components/net/lwip-2.1.2/src/netif/FILES
diff --git a/components/net/lwip-2.1.0/src/netif/bridgeif.c b/components/net/lwip-2.1.2/src/netif/bridgeif.c
index 8a97bce39d..8a97bce39d 100644
--- a/components/net/lwip-2.1.0/src/netif/bridgeif.c
+++ b/components/net/lwip-2.1.2/src/netif/bridgeif.c
diff --git a/components/net/lwip-2.1.0/src/netif/bridgeif_fdb.c b/components/net/lwip-2.1.2/src/netif/bridgeif_fdb.c
index 6739fc247c..6739fc247c 100644
--- a/components/net/lwip-2.1.0/src/netif/bridgeif_fdb.c
+++ b/components/net/lwip-2.1.2/src/netif/bridgeif_fdb.c
diff --git a/components/net/lwip-2.1.0/src/netif/ethernet.c b/components/net/lwip-2.1.2/src/netif/ethernet.c
index dd171e2806..dd171e2806 100644
--- a/components/net/lwip-2.1.0/src/netif/ethernet.c
+++ b/components/net/lwip-2.1.2/src/netif/ethernet.c
diff --git a/components/net/lwip-2.1.0/src/netif/ethernetif.c b/components/net/lwip-2.1.2/src/netif/ethernetif.c
index 637b025790..10865930c1 100755..100644
--- a/components/net/lwip-2.1.0/src/netif/ethernetif.c
+++ b/components/net/lwip-2.1.2/src/netif/ethernetif.c
@@ -42,8 +42,6 @@
  */
 
 #include "lwip/opt.h"
-
-#include "lwip/opt.h"
 #include "lwip/debug.h"
 #include "lwip/def.h"
 #include "lwip/mem.h"
@@ -174,7 +172,7 @@ static int lwip_netdev_set_dhcp(struct netdev *netif, rt_bool_t is_enabled)
 extern int lwip_ping_recv(int s, int *ttl);
 extern err_t lwip_ping_send(int s, ip_addr_t *addr, int size);
 
-int lwip_netdev_ping(struct netdev *netif, const char *host, size_t data_len,
+int lwip_netdev_ping(struct netdev *netif, const char *host, size_t data_len, 
                         uint32_t timeout, struct netdev_ping_resp *ping_resp)
 {
     int s, ttl, recv_len, result = 0;
@@ -189,7 +187,7 @@ int lwip_netdev_ping(struct netdev *netif, const char *host, size_t data_len,
     struct addrinfo hint, *res = RT_NULL;
     struct sockaddr_in *h = RT_NULL;
     struct in_addr ina;
-
+    
     RT_ASSERT(netif);
     RT_ASSERT(host);
     RT_ASSERT(ping_resp);
@@ -208,7 +206,7 @@ int lwip_netdev_ping(struct netdev *netif, const char *host, size_t data_len,
         return -RT_ERROR;
     }
     rt_memcpy(&(ping_resp->ip_addr), &target_addr, sizeof(ip_addr_t));
-
+    
     /* new a socket */
     if ((s = lwip_socket(AF_INET, SOCK_RAW, IP_PROTO_ICMP)) < 0)
     {
@@ -276,7 +274,7 @@ const struct netdev_ops lwip_netdev_ops =
     lwip_netdev_set_addr_info,
 #ifdef RT_LWIP_DNS
     lwip_netdev_set_dns_server,
-#else
+#else 
     NULL,
 #endif /* RT_LWIP_DNS */
 
@@ -315,7 +313,7 @@ static int netdev_add(struct netif *lwip_netif)
     {
         return -ERR_IF;
     }
-
+    
 #ifdef SAL_USING_LWIP
     extern int sal_lwip_netdev_set_pf_info(struct netdev *netdev);
     /* set the lwIP network interface device protocol family information */
@@ -324,7 +322,7 @@ static int netdev_add(struct netif *lwip_netif)
 
     rt_strncpy(name, lwip_netif->name, LWIP_NETIF_NAME_LEN);
     result = netdev_register(netdev, name, (void *)lwip_netif);
-
+	
     /* Update netdev info after registered */
     netdev->flags = lwip_netif->flags;
     netdev->mtu = lwip_netif->mtu;
@@ -367,7 +365,7 @@ static int netdev_flags_sync(struct netif *lwip_netif)
     {
         return -ERR_IF;
     }
-
+    
     netdev->mtu = lwip_netif->mtu;
     netdev->flags |= lwip_netif->flags;
 
@@ -430,7 +428,7 @@ static err_t eth_netif_device_init(struct netif *netif)
         /* copy device flags to netif flags */
         netif->flags = (ethif->flags & 0xff);
         netif->mtu = ETHERNET_MTU;
-
+        
         /* set output */
         netif->output       = etharp_output;
 
@@ -522,7 +520,7 @@ rt_err_t eth_device_init_with_flag(struct eth_device *dev, const char *name, rt_
 
     /* set linkoutput */
     netif->linkoutput   = ethernetif_linkoutput;
-
+        
     /* get hardware MAC address */
     rt_device_control(&(dev->parent), NIOCTL_GADDR, netif->hwaddr);
 
@@ -542,7 +540,7 @@ rt_err_t eth_device_init_with_flag(struct eth_device *dev, const char *name, rt_
         ipaddr.addr = inet_addr(RT_LWIP_IPADDR);
         gw.addr = inet_addr(RT_LWIP_GWADDR);
         netmask.addr = inet_addr(RT_LWIP_MSKADDR);
-#else
+#else        
         IP4_ADDR(&ipaddr, 0, 0, 0, 0);
         IP4_ADDR(&gw, 0, 0, 0, 0);
         IP4_ADDR(&netmask, 0, 0, 0, 0);
@@ -694,7 +692,7 @@ static void eth_rx_thread_entry(void* parameter)
             while (1)
             {
                 if(device->eth_rx == RT_NULL) break;
-
+                
                 p = device->eth_rx(&(device->parent));
                 if (p != RT_NULL)
                 {
@@ -717,9 +715,9 @@ static void eth_rx_thread_entry(void* parameter)
 }
 #endif
 
-/* this function does not need,
- * use eth_system_device_init_private()
- * call by lwip_system_init().
+/* this function does not need, 
+ * use eth_system_device_init_private() 
+ * call by lwip_system_init(). 
  */
 int eth_system_device_init(void)
 {
@@ -866,22 +864,22 @@ void list_if(void)
 			ip6_addr_t *addr;
 			int addr_state;
 			int i;
-
+			
 			addr = (ip6_addr_t *)&netif->ip6_addr[0];
 			addr_state = netif->ip6_addr_state[0];
-
-			rt_kprintf("\nipv6 link-local: %s state:%02X %s\n", ip6addr_ntoa(addr),
+			
+			rt_kprintf("\nipv6 link-local: %s state:%02X %s\n", ip6addr_ntoa(addr), 
 			addr_state, ip6_addr_isvalid(addr_state)?"VALID":"INVALID");
-
+			
 			for(i=1; i<LWIP_IPV6_NUM_ADDRESSES; i++)
 			{
 				addr = (ip6_addr_t *)&netif->ip6_addr[i];
 				addr_state = netif->ip6_addr_state[i];
-
-				rt_kprintf("ipv6[%d] address: %s state:%02X %s\n", i, ip6addr_ntoa(addr),
+			
+				rt_kprintf("ipv6[%d] address: %s state:%02X %s\n", i, ip6addr_ntoa(addr), 
 				addr_state, ip6_addr_isvalid(addr_state)?"VALID":"INVALID");
 			}
-
+			
 		}
         rt_kprintf("\r\n");
 #endif /* LWIP_IPV6 */
diff --git a/components/net/lwip-2.1.0/src/netif/lowpan6.c b/components/net/lwip-2.1.2/src/netif/lowpan6.c
index 6397b0cb5d..b180b0c2e7 100644
--- a/components/net/lwip-2.1.0/src/netif/lowpan6.c
+++ b/components/net/lwip-2.1.2/src/netif/lowpan6.c
@@ -630,11 +630,11 @@ lowpan6_output(struct netif *netif, struct pbuf *q, const ip6_addr_t *ip6addr)
   }
 
   /* Send out the packet using the returned hardware address. */
-  result = lowpan6_hwaddr_to_addr(netif, &dest);
-  if (result != ERR_OK) {
-    MIB2_STATS_NETIF_INC(netif, ifoutdiscards);
-    return result;
-  }
+  dest.addr_len = netif->hwaddr_len;
+  /* XXX: Inferring the length of the source address from the destination address
+   * is not correct for IEEE 802.15.4, but currently we don't get this information
+   * from the neighbor cache */
+  SMEMCPY(dest.addr, hwaddr, netif->hwaddr_len);
   MIB2_STATS_NETIF_INC(netif, ifoutucastpkts);
   return lowpan6_frag(netif, q, &src, &dest);
 }
diff --git a/components/net/lwip-2.1.0/src/netif/lowpan6_ble.c b/components/net/lwip-2.1.2/src/netif/lowpan6_ble.c
index d89816d3b0..d89816d3b0 100644
--- a/components/net/lwip-2.1.0/src/netif/lowpan6_ble.c
+++ b/components/net/lwip-2.1.2/src/netif/lowpan6_ble.c
diff --git a/components/net/lwip-2.1.0/src/netif/lowpan6_common.c b/components/net/lwip-2.1.2/src/netif/lowpan6_common.c
index baea206a71..baea206a71 100644
--- a/components/net/lwip-2.1.0/src/netif/lowpan6_common.c
+++ b/components/net/lwip-2.1.2/src/netif/lowpan6_common.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/PPPD_FOLLOWUP b/components/net/lwip-2.1.2/src/netif/ppp/PPPD_FOLLOWUP
index c231982ae7..c231982ae7 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/PPPD_FOLLOWUP
+++ b/components/net/lwip-2.1.2/src/netif/ppp/PPPD_FOLLOWUP
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/auth.c b/components/net/lwip-2.1.2/src/netif/ppp/auth.c
index c8673ad0fb..c8673ad0fb 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/auth.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/auth.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/ccp.c b/components/net/lwip-2.1.2/src/netif/ppp/ccp.c
index f8519ebece..f8519ebece 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/ccp.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/ccp.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/chap-md5.c b/components/net/lwip-2.1.2/src/netif/ppp/chap-md5.c
index 88f069f032..88f069f032 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/chap-md5.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/chap-md5.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/chap-new.c b/components/net/lwip-2.1.2/src/netif/ppp/chap-new.c
index 485122d272..485122d272 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/chap-new.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/chap-new.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/chap_ms.c b/components/net/lwip-2.1.2/src/netif/ppp/chap_ms.c
index 5a989c9b7e..5a989c9b7e 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/chap_ms.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/chap_ms.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/demand.c b/components/net/lwip-2.1.2/src/netif/ppp/demand.c
index 26c6c30db1..26c6c30db1 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/demand.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/demand.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/eap.c b/components/net/lwip-2.1.2/src/netif/ppp/eap.c
index 8fb56368e7..8fb56368e7 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/eap.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/eap.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/ecp.c b/components/net/lwip-2.1.2/src/netif/ppp/ecp.c
index 4d84f60931..4d84f60931 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/ecp.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/ecp.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/eui64.c b/components/net/lwip-2.1.2/src/netif/ppp/eui64.c
index 01493bc1f8..01493bc1f8 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/eui64.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/eui64.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/fsm.c b/components/net/lwip-2.1.2/src/netif/ppp/fsm.c
index b1f08affff..b1f08affff 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/fsm.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/fsm.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/ipcp.c b/components/net/lwip-2.1.2/src/netif/ppp/ipcp.c
index b7c766eb0b..b7c766eb0b 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/ipcp.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/ipcp.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/ipv6cp.c b/components/net/lwip-2.1.2/src/netif/ppp/ipv6cp.c
index 11c18df743..11c18df743 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/ipv6cp.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/ipv6cp.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/lcp.c b/components/net/lwip-2.1.2/src/netif/ppp/lcp.c
index 90ed183b75..90ed183b75 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/lcp.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/lcp.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/magic.c b/components/net/lwip-2.1.2/src/netif/ppp/magic.c
index d0d87c5e55..d0d87c5e55 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/magic.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/magic.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/mppe.c b/components/net/lwip-2.1.2/src/netif/ppp/mppe.c
index 4cca89dec1..4cca89dec1 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/mppe.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/mppe.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/multilink.c b/components/net/lwip-2.1.2/src/netif/ppp/multilink.c
index 62014e8c87..62014e8c87 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/multilink.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/multilink.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/polarssl/README b/components/net/lwip-2.1.2/src/netif/ppp/polarssl/README
index 3fdf159ec1..3fdf159ec1 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/polarssl/README
+++ b/components/net/lwip-2.1.2/src/netif/ppp/polarssl/README
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/polarssl/arc4.c b/components/net/lwip-2.1.2/src/netif/ppp/polarssl/arc4.c
index 6e17ec421b..6e17ec421b 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/polarssl/arc4.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/polarssl/arc4.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/polarssl/des.c b/components/net/lwip-2.1.2/src/netif/ppp/polarssl/des.c
index 9a89d007bd..9a89d007bd 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/polarssl/des.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/polarssl/des.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/polarssl/md4.c b/components/net/lwip-2.1.2/src/netif/ppp/polarssl/md4.c
index b1701a07b9..b1701a07b9 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/polarssl/md4.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/polarssl/md4.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/polarssl/md5.c b/components/net/lwip-2.1.2/src/netif/ppp/polarssl/md5.c
index 1ec4d81a69..1ec4d81a69 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/polarssl/md5.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/polarssl/md5.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/polarssl/sha1.c b/components/net/lwip-2.1.2/src/netif/ppp/polarssl/sha1.c
index c2192eac54..c2192eac54 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/polarssl/sha1.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/polarssl/sha1.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/ppp.c b/components/net/lwip-2.1.2/src/netif/ppp/ppp.c
index a9c18e304f..a9c18e304f 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/ppp.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/ppp.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/pppapi.c b/components/net/lwip-2.1.2/src/netif/ppp/pppapi.c
index 947f7ba8c1..947f7ba8c1 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/pppapi.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/pppapi.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/pppcrypt.c b/components/net/lwip-2.1.2/src/netif/ppp/pppcrypt.c
index 82d78c13ac..82d78c13ac 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/pppcrypt.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/pppcrypt.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/pppoe.c b/components/net/lwip-2.1.2/src/netif/ppp/pppoe.c
index 8ed2d638fd..8ed2d638fd 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/pppoe.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/pppoe.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/pppol2tp.c b/components/net/lwip-2.1.2/src/netif/ppp/pppol2tp.c
index 4c4557fca1..4c4557fca1 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/pppol2tp.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/pppol2tp.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/pppos.c b/components/net/lwip-2.1.2/src/netif/ppp/pppos.c
index 246bead82c..dff0255449 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/pppos.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/pppos.c
@@ -482,7 +482,7 @@ pppos_input(ppp_pcb *ppp, u8_t *s, int l)
   u8_t cur_char;
   u8_t escaped;
   PPPOS_DECL_PROTECT(lev);
-#if PPP_INPROC_IRQ_SAFE
+#if !PPP_INPROC_IRQ_SAFE
   LWIP_ASSERT_CORE_LOCKED();
 #endif
 
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/upap.c b/components/net/lwip-2.1.2/src/netif/ppp/upap.c
index 3b2399dc23..3b2399dc23 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/upap.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/upap.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/utils.c b/components/net/lwip-2.1.2/src/netif/ppp/utils.c
index f1366dae45..f1366dae45 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/utils.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/utils.c
diff --git a/components/net/lwip-2.1.0/src/netif/ppp/vj.c b/components/net/lwip-2.1.2/src/netif/ppp/vj.c
index 3fecba6995..3fecba6995 100644
--- a/components/net/lwip-2.1.0/src/netif/ppp/vj.c
+++ b/components/net/lwip-2.1.2/src/netif/ppp/vj.c
diff --git a/components/net/lwip-2.1.0/src/netif/slipif.c b/components/net/lwip-2.1.2/src/netif/slipif.c
index 9b175dc3e4..9b175dc3e4 100644
--- a/components/net/lwip-2.1.0/src/netif/slipif.c
+++ b/components/net/lwip-2.1.2/src/netif/slipif.c
diff --git a/components/net/lwip-2.1.0/src/netif/zepif.c b/components/net/lwip-2.1.2/src/netif/zepif.c
index b4033030bf..b4033030bf 100644
--- a/components/net/lwip-2.1.0/src/netif/zepif.c
+++ b/components/net/lwip-2.1.2/src/netif/zepif.c
diff --git a/components/net/lwip-2.1.0/test/fuzz/Makefile b/components/net/lwip-2.1.2/test/fuzz/Makefile
index ccbe95611d..ccbe95611d 100644
--- a/components/net/lwip-2.1.0/test/fuzz/Makefile
+++ b/components/net/lwip-2.1.2/test/fuzz/Makefile
diff --git a/components/net/lwip-2.1.0/test/fuzz/README b/components/net/lwip-2.1.2/test/fuzz/README
index de6fb75631..de6fb75631 100644
--- a/components/net/lwip-2.1.0/test/fuzz/README
+++ b/components/net/lwip-2.1.2/test/fuzz/README
diff --git a/components/net/lwip-2.1.0/test/fuzz/config.h b/components/net/lwip-2.1.2/test/fuzz/config.h
index e69de29bb2..e69de29bb2 100644
--- a/components/net/lwip-2.1.0/test/fuzz/config.h
+++ b/components/net/lwip-2.1.2/test/fuzz/config.h
diff --git a/components/net/lwip-2.1.0/test/fuzz/fuzz.c b/components/net/lwip-2.1.2/test/fuzz/fuzz.c
index 8aa07ecc26..8aa07ecc26 100644
--- a/components/net/lwip-2.1.0/test/fuzz/fuzz.c
+++ b/components/net/lwip-2.1.2/test/fuzz/fuzz.c
diff --git a/components/net/lwip-2.1.0/test/fuzz/lwipopts.h b/components/net/lwip-2.1.2/test/fuzz/lwipopts.h
index 4ab26f289b..4ab26f289b 100644
--- a/components/net/lwip-2.1.0/test/fuzz/lwipopts.h
+++ b/components/net/lwip-2.1.2/test/fuzz/lwipopts.h
diff --git a/components/net/lwip-2.1.0/test/fuzz/output_to_pcap.sh b/components/net/lwip-2.1.2/test/fuzz/output_to_pcap.sh
index c999ff0392..c999ff0392 100644
--- a/components/net/lwip-2.1.0/test/fuzz/output_to_pcap.sh
+++ b/components/net/lwip-2.1.2/test/fuzz/output_to_pcap.sh
diff --git a/components/net/lwip-2.1.0/test/sockets/sockets_stresstest.c b/components/net/lwip-2.1.2/test/sockets/sockets_stresstest.c
index 3ac553b151..3ac553b151 100644
--- a/components/net/lwip-2.1.0/test/sockets/sockets_stresstest.c
+++ b/components/net/lwip-2.1.2/test/sockets/sockets_stresstest.c
diff --git a/components/net/lwip-2.1.0/test/sockets/sockets_stresstest.h b/components/net/lwip-2.1.2/test/sockets/sockets_stresstest.h
index 178e604ae6..178e604ae6 100644
--- a/components/net/lwip-2.1.0/test/sockets/sockets_stresstest.h
+++ b/components/net/lwip-2.1.2/test/sockets/sockets_stresstest.h
diff --git a/components/net/lwip-2.1.0/test/unit/Filelists.cmake b/components/net/lwip-2.1.2/test/unit/Filelists.cmake
index e1f40bc911..e1f40bc911 100644
--- a/components/net/lwip-2.1.0/test/unit/Filelists.cmake
+++ b/components/net/lwip-2.1.2/test/unit/Filelists.cmake
diff --git a/components/net/lwip-2.1.0/test/unit/Filelists.mk b/components/net/lwip-2.1.2/test/unit/Filelists.mk
index 4b77078216..4b77078216 100644
--- a/components/net/lwip-2.1.0/test/unit/Filelists.mk
+++ b/components/net/lwip-2.1.2/test/unit/Filelists.mk
diff --git a/components/net/lwip-2.1.0/test/unit/api/test_sockets.c b/components/net/lwip-2.1.2/test/unit/api/test_sockets.c
index 472fa48950..472fa48950 100644
--- a/components/net/lwip-2.1.0/test/unit/api/test_sockets.c
+++ b/components/net/lwip-2.1.2/test/unit/api/test_sockets.c
diff --git a/components/net/lwip-2.1.0/test/unit/api/test_sockets.h b/components/net/lwip-2.1.2/test/unit/api/test_sockets.h
index 0abb7a3057..0abb7a3057 100644
--- a/components/net/lwip-2.1.0/test/unit/api/test_sockets.h
+++ b/components/net/lwip-2.1.2/test/unit/api/test_sockets.h
diff --git a/components/net/lwip-2.1.0/test/unit/arch/sys_arch.c b/components/net/lwip-2.1.2/test/unit/arch/sys_arch.c
index cf826ebfe3..cf826ebfe3 100644
--- a/components/net/lwip-2.1.0/test/unit/arch/sys_arch.c
+++ b/components/net/lwip-2.1.2/test/unit/arch/sys_arch.c
diff --git a/components/net/lwip-2.1.0/test/unit/arch/sys_arch.h b/components/net/lwip-2.1.2/test/unit/arch/sys_arch.h
index 331c2f2f15..331c2f2f15 100644
--- a/components/net/lwip-2.1.0/test/unit/arch/sys_arch.h
+++ b/components/net/lwip-2.1.2/test/unit/arch/sys_arch.h
diff --git a/components/net/lwip-2.1.0/test/unit/core/test_def.c b/components/net/lwip-2.1.2/test/unit/core/test_def.c
index 0ae2e9c1e4..0ae2e9c1e4 100644
--- a/components/net/lwip-2.1.0/test/unit/core/test_def.c
+++ b/components/net/lwip-2.1.2/test/unit/core/test_def.c
diff --git a/components/net/lwip-2.1.0/test/unit/core/test_def.h b/components/net/lwip-2.1.2/test/unit/core/test_def.h
index 7316051217..7316051217 100644
--- a/components/net/lwip-2.1.0/test/unit/core/test_def.h
+++ b/components/net/lwip-2.1.2/test/unit/core/test_def.h
diff --git a/components/net/lwip-2.1.0/test/unit/core/test_mem.c b/components/net/lwip-2.1.2/test/unit/core/test_mem.c
index 2aeb20cfc9..2aeb20cfc9 100644
--- a/components/net/lwip-2.1.0/test/unit/core/test_mem.c
+++ b/components/net/lwip-2.1.2/test/unit/core/test_mem.c
diff --git a/components/net/lwip-2.1.0/test/unit/core/test_mem.h b/components/net/lwip-2.1.2/test/unit/core/test_mem.h
index 325134c30a..325134c30a 100644
--- a/components/net/lwip-2.1.0/test/unit/core/test_mem.h
+++ b/components/net/lwip-2.1.2/test/unit/core/test_mem.h
diff --git a/components/net/lwip-2.1.0/test/unit/core/test_netif.c b/components/net/lwip-2.1.2/test/unit/core/test_netif.c
index 2f68725f52..2f68725f52 100644
--- a/components/net/lwip-2.1.0/test/unit/core/test_netif.c
+++ b/components/net/lwip-2.1.2/test/unit/core/test_netif.c
diff --git a/components/net/lwip-2.1.0/test/unit/core/test_netif.h b/components/net/lwip-2.1.2/test/unit/core/test_netif.h
index 8f2b6b4685..8f2b6b4685 100644
--- a/components/net/lwip-2.1.0/test/unit/core/test_netif.h
+++ b/components/net/lwip-2.1.2/test/unit/core/test_netif.h
diff --git a/components/net/lwip-2.1.0/test/unit/core/test_pbuf.c b/components/net/lwip-2.1.2/test/unit/core/test_pbuf.c
index 57087d22a7..57087d22a7 100644
--- a/components/net/lwip-2.1.0/test/unit/core/test_pbuf.c
+++ b/components/net/lwip-2.1.2/test/unit/core/test_pbuf.c
diff --git a/components/net/lwip-2.1.0/test/unit/core/test_pbuf.h b/components/net/lwip-2.1.2/test/unit/core/test_pbuf.h
index da7730a4c8..da7730a4c8 100644
--- a/components/net/lwip-2.1.0/test/unit/core/test_pbuf.h
+++ b/components/net/lwip-2.1.2/test/unit/core/test_pbuf.h
diff --git a/components/net/lwip-2.1.0/test/unit/core/test_timers.c b/components/net/lwip-2.1.2/test/unit/core/test_timers.c
index 820b718924..820b718924 100644
--- a/components/net/lwip-2.1.0/test/unit/core/test_timers.c
+++ b/components/net/lwip-2.1.2/test/unit/core/test_timers.c
diff --git a/components/net/lwip-2.1.0/test/unit/core/test_timers.h b/components/net/lwip-2.1.2/test/unit/core/test_timers.h
index b16ab75bf0..b16ab75bf0 100644
--- a/components/net/lwip-2.1.0/test/unit/core/test_timers.h
+++ b/components/net/lwip-2.1.2/test/unit/core/test_timers.h
diff --git a/components/net/lwip-2.1.0/test/unit/dhcp/test_dhcp.c b/components/net/lwip-2.1.2/test/unit/dhcp/test_dhcp.c
index 4cefa33a14..4cefa33a14 100644
--- a/components/net/lwip-2.1.0/test/unit/dhcp/test_dhcp.c
+++ b/components/net/lwip-2.1.2/test/unit/dhcp/test_dhcp.c
diff --git a/components/net/lwip-2.1.0/test/unit/dhcp/test_dhcp.h b/components/net/lwip-2.1.2/test/unit/dhcp/test_dhcp.h
index 0d88fa1b69..0d88fa1b69 100644
--- a/components/net/lwip-2.1.0/test/unit/dhcp/test_dhcp.h
+++ b/components/net/lwip-2.1.2/test/unit/dhcp/test_dhcp.h
diff --git a/components/net/lwip-2.1.0/test/unit/etharp/test_etharp.c b/components/net/lwip-2.1.2/test/unit/etharp/test_etharp.c
index 8eb506c1b9..8eb506c1b9 100644
--- a/components/net/lwip-2.1.0/test/unit/etharp/test_etharp.c
+++ b/components/net/lwip-2.1.2/test/unit/etharp/test_etharp.c
diff --git a/components/net/lwip-2.1.0/test/unit/etharp/test_etharp.h b/components/net/lwip-2.1.2/test/unit/etharp/test_etharp.h
index 2dd772d8d0..2dd772d8d0 100644
--- a/components/net/lwip-2.1.0/test/unit/etharp/test_etharp.h
+++ b/components/net/lwip-2.1.2/test/unit/etharp/test_etharp.h
diff --git a/components/net/lwip-2.1.0/test/unit/ip4/test_ip4.c b/components/net/lwip-2.1.2/test/unit/ip4/test_ip4.c
index a5a7fd93fe..a5a7fd93fe 100644
--- a/components/net/lwip-2.1.0/test/unit/ip4/test_ip4.c
+++ b/components/net/lwip-2.1.2/test/unit/ip4/test_ip4.c
diff --git a/components/net/lwip-2.1.0/test/unit/ip4/test_ip4.h b/components/net/lwip-2.1.2/test/unit/ip4/test_ip4.h
index df84a69f1a..df84a69f1a 100644
--- a/components/net/lwip-2.1.0/test/unit/ip4/test_ip4.h
+++ b/components/net/lwip-2.1.2/test/unit/ip4/test_ip4.h
diff --git a/components/net/lwip-2.1.0/test/unit/ip6/test_ip6.c b/components/net/lwip-2.1.2/test/unit/ip6/test_ip6.c
index f337136d20..f337136d20 100644
--- a/components/net/lwip-2.1.0/test/unit/ip6/test_ip6.c
+++ b/components/net/lwip-2.1.2/test/unit/ip6/test_ip6.c
diff --git a/components/net/lwip-2.1.0/test/unit/ip6/test_ip6.h b/components/net/lwip-2.1.2/test/unit/ip6/test_ip6.h
index a09345b380..a09345b380 100644
--- a/components/net/lwip-2.1.0/test/unit/ip6/test_ip6.h
+++ b/components/net/lwip-2.1.2/test/unit/ip6/test_ip6.h
diff --git a/components/net/lwip-2.1.0/test/unit/lwip_check.h b/components/net/lwip-2.1.2/test/unit/lwip_check.h
index 522a9c3e7f..522a9c3e7f 100644
--- a/components/net/lwip-2.1.0/test/unit/lwip_check.h
+++ b/components/net/lwip-2.1.2/test/unit/lwip_check.h
diff --git a/components/net/lwip-2.1.0/test/unit/lwip_unittests.c b/components/net/lwip-2.1.2/test/unit/lwip_unittests.c
index 497a44b24a..497a44b24a 100644
--- a/components/net/lwip-2.1.0/test/unit/lwip_unittests.c
+++ b/components/net/lwip-2.1.2/test/unit/lwip_unittests.c
diff --git a/components/net/lwip-2.1.0/test/unit/lwipopts.h b/components/net/lwip-2.1.2/test/unit/lwipopts.h
index c00ace1561..c00ace1561 100644
--- a/components/net/lwip-2.1.0/test/unit/lwipopts.h
+++ b/components/net/lwip-2.1.2/test/unit/lwipopts.h
diff --git a/components/net/lwip-2.1.0/test/unit/mdns/test_mdns.c b/components/net/lwip-2.1.2/test/unit/mdns/test_mdns.c
index 638516370a..638516370a 100644
--- a/components/net/lwip-2.1.0/test/unit/mdns/test_mdns.c
+++ b/components/net/lwip-2.1.2/test/unit/mdns/test_mdns.c
diff --git a/components/net/lwip-2.1.0/test/unit/mdns/test_mdns.h b/components/net/lwip-2.1.2/test/unit/mdns/test_mdns.h
index c3df339140..c3df339140 100644
--- a/components/net/lwip-2.1.0/test/unit/mdns/test_mdns.h
+++ b/components/net/lwip-2.1.2/test/unit/mdns/test_mdns.h
diff --git a/components/net/lwip-2.1.0/test/unit/mqtt/test_mqtt.c b/components/net/lwip-2.1.2/test/unit/mqtt/test_mqtt.c
index 32f08e67d8..7cff13ea23 100644
--- a/components/net/lwip-2.1.0/test/unit/mqtt/test_mqtt.c
+++ b/components/net/lwip-2.1.2/test/unit/mqtt/test_mqtt.c
@@ -94,6 +94,8 @@ START_TEST(basic_connect)
   p = pbuf_alloc(PBUF_RAW, sizeof(rxbuf), PBUF_REF);
   fail_unless(p != NULL);
   p->payload = rxbuf;
+  /* since we hack the rx path, we have to hack the rx window, too: */
+  client->conn->rcv_wnd -= p->tot_len;
   if (client->conn->recv(client->conn->callback_arg, client->conn, p, ERR_OK) != ERR_OK) {
     pbuf_free(p);
   }
diff --git a/components/net/lwip-2.1.0/test/unit/mqtt/test_mqtt.h b/components/net/lwip-2.1.2/test/unit/mqtt/test_mqtt.h
index 181758c4b3..181758c4b3 100644
--- a/components/net/lwip-2.1.0/test/unit/mqtt/test_mqtt.h
+++ b/components/net/lwip-2.1.2/test/unit/mqtt/test_mqtt.h
diff --git a/components/net/lwip-2.1.0/test/unit/tcp/tcp_helper.c b/components/net/lwip-2.1.2/test/unit/tcp/tcp_helper.c
index 8689b71ac8..8689b71ac8 100644
--- a/components/net/lwip-2.1.0/test/unit/tcp/tcp_helper.c
+++ b/components/net/lwip-2.1.2/test/unit/tcp/tcp_helper.c
diff --git a/components/net/lwip-2.1.0/test/unit/tcp/tcp_helper.h b/components/net/lwip-2.1.2/test/unit/tcp/tcp_helper.h
index cc72e2aba9..cc72e2aba9 100644
--- a/components/net/lwip-2.1.0/test/unit/tcp/tcp_helper.h
+++ b/components/net/lwip-2.1.2/test/unit/tcp/tcp_helper.h
diff --git a/components/net/lwip-2.1.0/test/unit/tcp/test_tcp.c b/components/net/lwip-2.1.2/test/unit/tcp/test_tcp.c
index 9e84c6d945..c7f85f6a16 100644
--- a/components/net/lwip-2.1.0/test/unit/tcp/test_tcp.c
+++ b/components/net/lwip-2.1.2/test/unit/tcp/test_tcp.c
@@ -330,6 +330,53 @@ START_TEST(test_tcp_passive_close)
 }
 END_TEST
 
+START_TEST(test_tcp_active_abort)
+{
+  struct test_tcp_counters counters;
+  struct tcp_pcb* pcb;
+  char data = 0x0f;
+  struct netif netif;
+  struct test_tcp_txcounters txcounters;
+  LWIP_UNUSED_ARG(_i);
+
+  memset(&txcounters, 0, sizeof(txcounters));
+
+  /* initialize local vars */
+  test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
+
+  /* initialize counter struct */
+  memset(&counters, 0, sizeof(counters));
+  counters.expected_data_len = 1;
+  counters.expected_data = &data;
+
+  /* create and initialize the pcb */
+  pcb = test_tcp_new_counters_pcb(&counters);
+  EXPECT_RET(pcb != NULL);
+  tcp_set_state(pcb, ESTABLISHED, &test_local_ip, &test_remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
+
+  /* abort the pcb */
+  EXPECT_RET(txcounters.num_tx_calls == 0);
+  txcounters.copy_tx_packets = 1;
+  tcp_abort(pcb);
+  txcounters.copy_tx_packets = 0;
+  EXPECT(txcounters.num_tx_calls == 1);
+  EXPECT(txcounters.num_tx_bytes == 40U);
+  EXPECT(txcounters.tx_packets != NULL);
+  if (txcounters.tx_packets != NULL) {
+    u16_t ret;
+    struct tcp_hdr tcphdr;
+    ret = pbuf_copy_partial(txcounters.tx_packets, &tcphdr, 20, 20);
+    EXPECT(ret == 20);
+    EXPECT(tcphdr.dest == PP_HTONS(TEST_REMOTE_PORT));
+    EXPECT(tcphdr.src == PP_HTONS(TEST_LOCAL_PORT));
+    pbuf_free(txcounters.tx_packets);
+    txcounters.tx_packets = NULL;
+  }
+
+  /* don't free the pcb here (part of the test!) */
+}
+END_TEST
+
 /** Check that we handle malformed tcp headers, and discard the pbuf(s) */
 START_TEST(test_tcp_malformed_header)
 {
@@ -1627,6 +1674,7 @@ tcp_suite(void)
     TESTFUNC(test_tcp_recv_inseq),
     TESTFUNC(test_tcp_recv_inseq_trim),
     TESTFUNC(test_tcp_passive_close),
+    TESTFUNC(test_tcp_active_abort),
     TESTFUNC(test_tcp_malformed_header),
     TESTFUNC(test_tcp_fast_retx_recover),
     TESTFUNC(test_tcp_fast_rexmit_wraparound),
diff --git a/components/net/lwip-2.1.0/test/unit/tcp/test_tcp.h b/components/net/lwip-2.1.2/test/unit/tcp/test_tcp.h
index f28ee56530..f28ee56530 100644
--- a/components/net/lwip-2.1.0/test/unit/tcp/test_tcp.h
+++ b/components/net/lwip-2.1.2/test/unit/tcp/test_tcp.h
diff --git a/components/net/lwip-2.1.0/test/unit/tcp/test_tcp_oos.c b/components/net/lwip-2.1.2/test/unit/tcp/test_tcp_oos.c
index a190e7dca3..a190e7dca3 100644
--- a/components/net/lwip-2.1.0/test/unit/tcp/test_tcp_oos.c
+++ b/components/net/lwip-2.1.2/test/unit/tcp/test_tcp_oos.c
diff --git a/components/net/lwip-2.1.0/test/unit/tcp/test_tcp_oos.h b/components/net/lwip-2.1.2/test/unit/tcp/test_tcp_oos.h
index 5b82013b73..5b82013b73 100644
--- a/components/net/lwip-2.1.0/test/unit/tcp/test_tcp_oos.h
+++ b/components/net/lwip-2.1.2/test/unit/tcp/test_tcp_oos.h
diff --git a/components/net/lwip-2.1.0/test/unit/udp/test_udp.c b/components/net/lwip-2.1.2/test/unit/udp/test_udp.c
index e26a83ec66..e26a83ec66 100644
--- a/components/net/lwip-2.1.0/test/unit/udp/test_udp.c
+++ b/components/net/lwip-2.1.2/test/unit/udp/test_udp.c
diff --git a/components/net/lwip-2.1.0/test/unit/udp/test_udp.h b/components/net/lwip-2.1.2/test/unit/udp/test_udp.h
index 5426bf42e7..5426bf42e7 100644
--- a/components/net/lwip-2.1.0/test/unit/udp/test_udp.h
+++ b/components/net/lwip-2.1.2/test/unit/udp/test_udp.h
diff --git a/components/utilities/ulog/syslog/syslog.c b/components/utilities/ulog/syslog/syslog.c
index 7586148fbf..872c84d331 100644
--- a/components/utilities/ulog/syslog/syslog.c
+++ b/components/utilities/ulog/syslog/syslog.c
@@ -192,10 +192,10 @@ RT_WEAK rt_size_t syslog_formater(char *log_buf, int level, const char *tag, rt_
 
 #ifdef ULOG_OUTPUT_LEVEL
         rt_snprintf(log_buf + log_len, ULOG_LINE_BUF_SIZE - log_len, "<%d>%s%3d %02d:%02d:%02d", level,
-                get_month_str(tm->tm_mon + 1), tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec, rt_tick_get() % 1000);
+                get_month_str(tm->tm_mon + 1), tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
 #else
         rt_snprintf(log_buf + log_len, ULOG_LINE_BUF_SIZE - log_len, "%s%3d %02d:%02d:%02d",
-                get_month_str(tm->tm_mon + 1), tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec, rt_tick_get() % 1000);
+                get_month_str(tm->tm_mon + 1), tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
 #endif /* ULOG_OUTPUT_LEVEL */
 
         log_len += rt_strlen(log_buf + log_len);