feat(demo): add mongoose rndis demo

Signed-off-by: sakumisu <[email protected]>

3 files changed, 255 insertions, 0 deletions

diff --git a/demo/mongoose/cdc_rndis_mongoose.c b/demo/mongoose/cdc_rndis_mongoose.c
new file mode 100644
index 00000000..0f571b57
--- /dev/null
+++ b/demo/mongoose/cdc_rndis_mongoose.c
@@ -0,0 +1,233 @@
+/*
+ * Copyright (c) 2025, sakumisu
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include "usbd_core.h"
+#include "usbd_rndis.h"
+#include "rndis_protocol.h"
+#include "mongoose.h"
+
+#ifdef CONFIG_USBDEV_RNDIS_USING_LWIP
+#error Do not define CONFIG_USBDEV_RNDIS_USING_LWIP in this demo
+#endif
+
+/*!< endpoint address */
+#define CDC_IN_EP  0x81
+#define CDC_OUT_EP 0x02
+#define CDC_INT_EP 0x83
+
+/*!< config descriptor size */
+#define USB_CONFIG_SIZE (9 + CDC_RNDIS_DESCRIPTOR_LEN)
+
+static const uint8_t device_descriptor[] = {
+    USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0xEF, 0x02, 0x01, USBD_VID, USBD_PID, 0x0100, 0x01)
+};
+
+static const uint8_t config_descriptor_hs[] = {
+    USB_CONFIG_DESCRIPTOR_INIT(USB_CONFIG_SIZE, 0x02, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER),
+    CDC_RNDIS_DESCRIPTOR_INIT(0x00, CDC_INT_EP, CDC_OUT_EP, CDC_IN_EP, USB_BULK_EP_MPS_HS, 0x02),
+};
+
+static const uint8_t config_descriptor_fs[] = {
+    USB_CONFIG_DESCRIPTOR_INIT(USB_CONFIG_SIZE, 0x02, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER),
+    CDC_RNDIS_DESCRIPTOR_INIT(0x00, CDC_INT_EP, CDC_OUT_EP, CDC_IN_EP, USB_BULK_EP_MPS_FS, 0x02),
+};
+
+static const uint8_t device_quality_descriptor[] = {
+    USB_DEVICE_QUALIFIER_DESCRIPTOR_INIT(USB_2_0, 0xEF, 0x02, 0x01, 0x01),
+};
+
+static const uint8_t other_speed_config_descriptor_hs[] = {
+    USB_OTHER_SPEED_CONFIG_DESCRIPTOR_INIT(USB_CONFIG_SIZE, 0x02, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER),
+    CDC_RNDIS_DESCRIPTOR_INIT(0x00, CDC_INT_EP, CDC_OUT_EP, CDC_IN_EP, USB_BULK_EP_MPS_FS, 0x02),
+};
+
+static const uint8_t other_speed_config_descriptor_fs[] = {
+    USB_OTHER_SPEED_CONFIG_DESCRIPTOR_INIT(USB_CONFIG_SIZE, 0x02, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER),
+    CDC_RNDIS_DESCRIPTOR_INIT(0x00, CDC_INT_EP, CDC_OUT_EP, CDC_IN_EP, USB_BULK_EP_MPS_HS, 0x02),
+};
+
+static const char *string_descriptors[] = {
+    (const char[]){ 0x09, 0x04 },    /* Langid */
+    "CherryUSB",                     /* Manufacturer */
+    "CherryUSB RNDIS MONGOOSE DEMO", /* Product */
+    "2025123456",                    /* Serial Number */
+};
+
+static const uint8_t *device_descriptor_callback(uint8_t speed)
+{
+    (void)speed;
+
+    return device_descriptor;
+}
+
+static const uint8_t *config_descriptor_callback(uint8_t speed)
+{
+    if (speed == USB_SPEED_HIGH) {
+        return config_descriptor_hs;
+    } else if (speed == USB_SPEED_FULL) {
+        return config_descriptor_fs;
+    } else {
+        return NULL;
+    }
+}
+
+static const uint8_t *device_quality_descriptor_callback(uint8_t speed)
+{
+    (void)speed;
+
+    return device_quality_descriptor;
+}
+
+static const uint8_t *other_speed_config_descriptor_callback(uint8_t speed)
+{
+    if (speed == USB_SPEED_HIGH) {
+        return other_speed_config_descriptor_hs;
+    } else if (speed == USB_SPEED_FULL) {
+        return other_speed_config_descriptor_fs;
+    } else {
+        return NULL;
+    }
+}
+
+static const char *string_descriptor_callback(uint8_t speed, uint8_t index)
+{
+    (void)speed;
+
+    if (index >= (sizeof(string_descriptors) / sizeof(char *))) {
+        return NULL;
+    }
+    return string_descriptors[index];
+}
+
+const struct usb_descriptor cdc_descriptor = {
+    .device_descriptor_callback = device_descriptor_callback,
+    .config_descriptor_callback = config_descriptor_callback,
+    .device_quality_descriptor_callback = device_quality_descriptor_callback,
+    .other_speed_descriptor_callback = other_speed_config_descriptor_callback,
+    .string_descriptor_callback = string_descriptor_callback,
+};
+
+static uint8_t rndis_mac[6] = { 0x20, 0x89, 0x84, 0x6A, 0x96, 0xAA };
+
+static USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t g_rndis_rx_buffer[USB_ALIGN_UP(CONFIG_USBDEV_RNDIS_ETH_MAX_FRAME_SIZE, CONFIG_USB_ALIGN_SIZE)];
+static USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t g_rndis_tx_buffer[USB_ALIGN_UP(CONFIG_USBDEV_RNDIS_ETH_MAX_FRAME_SIZE, CONFIG_USB_ALIGN_SIZE)];
+
+volatile bool g_rndis_tx_busy_flag = false;
+
+static void usbd_event_handler(uint8_t busid, uint8_t event)
+{
+    (void)busid;
+
+    switch (event) {
+        case USBD_EVENT_RESET:
+            break;
+        case USBD_EVENT_CONNECTED:
+            break;
+        case USBD_EVENT_DISCONNECTED:
+            break;
+        case USBD_EVENT_RESUME:
+            break;
+        case USBD_EVENT_SUSPEND:
+            break;
+        case USBD_EVENT_CONFIGURED:
+            g_rndis_tx_busy_flag = false;
+            usbd_rndis_start_read(g_rndis_rx_buffer, sizeof(g_rndis_rx_buffer));
+            break;
+        case USBD_EVENT_SET_REMOTE_WAKEUP:
+            break;
+        case USBD_EVENT_CLR_REMOTE_WAKEUP:
+            break;
+
+        default:
+            break;
+    }
+}
+
+static struct mg_tcpip_if *s_ifp;
+
+void usbd_rndis_data_recv_done(uint32_t len)
+{
+    (void)len;
+
+    rndis_data_packet_t *hdr;
+    uint8_t *buf;
+
+    hdr = (rndis_data_packet_t *)g_rndis_rx_buffer;
+    buf = (uint8_t *)hdr + hdr->DataOffset + sizeof(rndis_generic_msg_t);
+
+    mg_tcpip_qwrite((void *)buf, hdr->DataLength, s_ifp);
+
+    usbd_rndis_start_read(g_rndis_rx_buffer, sizeof(g_rndis_rx_buffer));
+}
+
+void usbd_rndis_data_send_done(uint32_t len)
+{
+    (void)len;
+
+    g_rndis_tx_busy_flag = false;
+}
+
+static size_t usb_tx(const void *buf, size_t len, struct mg_tcpip_if *ifp)
+{
+    (void)ifp;
+    rndis_data_packet_t *hdr;
+
+    if (!usb_device_is_configured(0))
+        return 0;
+
+    hdr = (rndis_data_packet_t *)g_rndis_tx_buffer;
+
+    memset(hdr, 0, sizeof(rndis_data_packet_t));
+    hdr->MessageType = REMOTE_NDIS_PACKET_MSG;
+    hdr->MessageLength = sizeof(rndis_data_packet_t) + len;
+    hdr->DataOffset = sizeof(rndis_data_packet_t) - sizeof(rndis_generic_msg_t);
+    hdr->DataLength = len;
+
+    memcpy(g_rndis_tx_buffer + sizeof(rndis_data_packet_t), buf, len);
+
+    g_rndis_tx_busy_flag = true;
+    usbd_rndis_start_write(g_rndis_tx_buffer, sizeof(rndis_data_packet_t) + len);
+    while (g_rndis_tx_busy_flag) {
+    }
+    return len;
+}
+
+static bool usb_poll(struct mg_tcpip_if *ifp, bool s1)
+{
+    (void)ifp;
+
+    return s1 ? usb_device_is_configured(0) : false;
+}
+
+struct mg_tcpip_driver driver = { .tx = usb_tx, .poll = usb_poll };
+
+struct usbd_interface intf0;
+struct usbd_interface intf1;
+
+struct mg_mgr mgr; // Initialise Mongoose event manager
+
+void cdc_rndis_mongoose_init(uint8_t busid, uint32_t reg_base)
+{
+    mg_mgr_init(&mgr); // and attach it to the interface
+
+    static struct mg_tcpip_if mif = { .mac = { 2, 0, 1, 2, 3, 0x77 },
+                                      .enable_dhcp_server = true,
+                                      .driver = &driver,
+                                      .recv_queue.size = 4096 };
+    s_ifp = &mif;
+
+    mif.ip = mg_htonl(MG_U32(192, 168, 7, 1));
+    mif.mask = mg_htonl(MG_U32(255, 255, 255, 0));
+    mg_tcpip_init(&mgr, &mif);
+
+    web_init(&mgr);
+
+    usbd_desc_register(busid, &cdc_descriptor);
+    usbd_add_interface(busid, usbd_rndis_init_intf(&intf0, CDC_OUT_EP, CDC_IN_EP, CDC_INT_EP, rndis_mac));
+    usbd_add_interface(busid, usbd_rndis_init_intf(&intf1, CDC_OUT_EP, CDC_IN_EP, CDC_INT_EP, rndis_mac));
+    usbd_initialize(busid, reg_base, usbd_event_handler);
+}
+
+// call mg_mgr_poll(&mgr, 0); in main loop
\ No newline at end of file
diff --git a/demo/mongoose/mongoose.png b/demo/mongoose/mongoose.png
new file mode 100644
index 00000000..974ff58e
--- /dev/null
+++ b/demo/mongoose/mongoose.png
diff --git a/demo/mongoose/mongoose_config.h b/demo/mongoose/mongoose_config.h
new file mode 100644
index 00000000..22e957d7
--- /dev/null
+++ b/demo/mongoose/mongoose_config.h
@@ -0,0 +1,22 @@
+#pragma once
+
+// See https://mongoose.ws/documentation/#build-options
+#define MG_ARCH MG_ARCH_CUSTOM
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <time.h>
+
+#define MG_ENABLE_TCPIP 1
+#define MG_ENABLE_CUSTOM_MILLIS 1
+#define MG_ENABLE_CUSTOM_RANDOM 1
+#define MG_ENABLE_PACKED_FS 1
+#define MG_IO_SIZE 1460