diff options
Diffstat (limited to 'examples/network/tcpserver.c')
| -rw-r--r-- | examples/network/tcpserver.c | 223 |
1 files changed, 115 insertions, 108 deletions
diff --git a/examples/network/tcpserver.c b/examples/network/tcpserver.c index f07d2cd0e2..97292449a0 100644 --- a/examples/network/tcpserver.c +++ b/examples/network/tcpserver.c @@ -1,140 +1,147 @@ #include <rtthread.h> -//#include <lwip/sockets.h> /* 使用BSD Socket接口必须包含sockets.h这个头文件 */ -#include <sys/socket.h> /* 使用BSD socket，需要包含sockets.h头文件 */ +#include <sys/socket.h> /* 使用BSD socket，需要包含socket.h头文件 */ #include "netdb.h" +#define BUFSZ (1024) + static const char send_data[] = "This is TCP Server from RT-Thread."; /* 发送用到的数据 */ -void tcpserv(void* parameter) +static void tcpserv(void *parameter) { - char *recv_data; /* 用于接收的指针，后面会做一次动态分配以请求可用内存 */ - rt_uint32_t sin_size; - int sock, connected, bytes_received; - struct sockaddr_in server_addr, client_addr; - rt_bool_t stop = RT_FALSE; /* 停止标志 */ - int ret; + char *recv_data; /* 用于接收的指针，后面会做一次动态分配以请求可用内存 */ + socklen_t sin_size; + int sock, connected, bytes_received; + struct sockaddr_in server_addr, client_addr; + rt_bool_t stop = RT_FALSE; /* 停止标志 */ + int ret; - recv_data = rt_malloc(1024); /* 分配接收用的数据缓冲 */ - if (recv_data == RT_NULL) - { - rt_kprintf("No memory\n"); - return; - } + recv_data = rt_malloc(BUFSZ + 1); /* 分配接收用的数据缓冲 */ + if (recv_data == RT_NULL) + { + rt_kprintf("No memory\n"); + return; + } - /* 一个socket在使用前，需要预先创建出来，指定SOCK_STREAM为TCP的socket */ - if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) - { - /* 创建失败的错误处理 */ - rt_kprintf("Socket error\n"); + /* 一个socket在使用前，需要预先创建出来，指定SOCK_STREAM为TCP的socket */ + if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) + { + /* 创建失败的错误处理 */ + rt_kprintf("Socket error\n"); - /* 释放已分配的接收缓冲 */ - rt_free(recv_data); - return; - } + /* 释放已分配的接收缓冲 */ + rt_free(recv_data); + return; + } - /* 初始化服务端地址 */ - server_addr.sin_family = AF_INET; - server_addr.sin_port = htons(5000); /* 服务端工作的端口 */ - server_addr.sin_addr.s_addr = INADDR_ANY; - rt_memset(&(server_addr.sin_zero),8, sizeof(server_addr.sin_zero)); + /* 初始化服务端地址 */ + server_addr.sin_family = AF_INET; + server_addr.sin_port = htons(5000); /* 服务端工作的端口 */ + server_addr.sin_addr.s_addr = INADDR_ANY; + rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero)); - /* 绑定socket到服务端地址 */ - if (bind(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1) - { - /* 绑定失败 */ - rt_kprintf("Unable to bind\n"); + /* 绑定socket到服务端地址 */ + if (bind(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1) + { + /* 绑定失败 */ + rt_kprintf("Unable to bind\n"); - /* 释放已分配的接收缓冲 */ - rt_free(recv_data); - return; - } + /* 释放已分配的接收缓冲 */ + rt_free(recv_data); + return; + } - /* 在socket上进行监听 */ - if (listen(sock, 5) == -1) - { - rt_kprintf("Listen error\n"); + /* 在socket上进行监听 */ + if (listen(sock, 5) == -1) + { + rt_kprintf("Listen error\n"); - /* release recv buffer */ - rt_free(recv_data); - return; - } + /* release recv buffer */ + rt_free(recv_data); + return; + } - rt_kprintf("\nTCPServer Waiting for client on port 5000...\n"); - while(stop != RT_TRUE) - { - sin_size = sizeof(struct sockaddr_in); + rt_kprintf("\nTCPServer Waiting for client on port 5000...\n"); + while (stop != RT_TRUE) + { + sin_size = sizeof(struct sockaddr_in); - /* 接受一个客户端连接socket的请求，这个函数调用是阻塞式的 */ - connected = accept(sock, (struct sockaddr *)&client_addr, &sin_size); - /* 返回的是连接成功的socket */ + /* 接受一个客户端连接socket的请求，这个函数调用是阻塞式的 */ + connected = accept(sock, (struct sockaddr *)&client_addr, &sin_size); + /* 返回的是连接成功的socket */ + if (connected < 0) + { + rt_kprintf("accept connection failed! errno = %d\n", errno); + continue; + } - /* 接受返回的client_addr指向了客户端的地址信息 */ - rt_kprintf("I got a connection from (%s , %d)\n", - inet_ntoa(client_addr.sin_addr),ntohs(client_addr.sin_port)); + /* 接受返回的client_addr指向了客户端的地址信息 */ + rt_kprintf("I got a connection from (%s , %d)\n", + inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port)); - /* 客户端连接的处理 */ - while (1) - { - /* 发送数据到connected socket */ - ret = send(connected, send_data, strlen(send_data), 0); - if (ret < 0) - { + /* 客户端连接的处理 */ + while (1) + { + /* 发送数据到connected socket */ + ret = send(connected, send_data, strlen(send_data), 0); + if (ret < 0) + { /* 发送失败，关闭这个连接 */ closesocket(connected); rt_kprintf("\nsend error,close the socket.\r\n"); break; - } - else if (ret == 0) - { + } + else if (ret == 0) + { /* 打印send函数返回值为0的警告信息 */ rt_kprintf("\n Send warning,send function return 0.\r\n"); - } + } - /* 从connected socket中接收数据，接收buffer是1024大小，但并不一定能够收到1024大小的数据 */ - bytes_received = recv(connected,recv_data, 1024, 0); - if (bytes_received < 0) - { - /* 接收失败，关闭这个connected socket */ - closesocket(connected); - break; - } - else if (bytes_received == 0) - { - /* 打印recv函数返回值为0的警告信息 */ - rt_kprintf("\nReceived warning,recv function return 0.\r\n"); - continue; - } + /* 从connected socket中接收数据，接收buffer是1024大小，但并不一定能够收到1024大小的数据 */ + bytes_received = recv(connected, recv_data, BUFSZ, 0); + if (bytes_received < 0) + { + /* 接收失败，关闭这个connected socket */ + closesocket(connected); + break; + } + else if (bytes_received == 0) + { + /* 打印recv函数返回值为0的警告信息 */ + rt_kprintf("\nReceived warning,recv function return 0.\r\n"); + closesocket(connected); + break; + } - /* 有接收到数据，把末端清零 */ - recv_data[bytes_received] = '\0'; - if (strcmp(recv_data , "q") == 0 || strcmp(recv_data , "Q") == 0) - { - /* 如果是首字母是q或Q，关闭这个连接 */ - closesocket(connected); - break; - } - else if (strcmp(recv_data, "exit") == 0) - { - /* 如果接收的是exit，则关闭整个服务端 */ - closesocket(connected); - stop = RT_TRUE; - break; - } - else - { - /* 在控制终端显示收到的数据 */ - rt_kprintf("RECEIVED DATA = %s \n" , recv_data); - } - } - } + /* 有接收到数据，把末端清零 */ + recv_data[bytes_received] = '\0'; + if (strcmp(recv_data, "q") == 0 || strcmp(recv_data, "Q") == 0) + { + /* 如果是首字母是q或Q，关闭这个连接 */ + closesocket(connected); + break; + } + else if (strcmp(recv_data, "exit") == 0) + { + /* 如果接收的是exit，则关闭整个服务端 */ + closesocket(connected); + stop = RT_TRUE; + break; + } + else + { + /* 在控制终端显示收到的数据 */ + rt_kprintf("RECEIVED DATA = %s \n", recv_data); + } + } + } - /* 退出服务 */ - closesocket(sock); + /* 退出服务 */ + closesocket(sock); - /* 释放接收缓冲 */ - rt_free(recv_data); + /* 释放接收缓冲 */ + rt_free(recv_data); - return ; + return ; } #ifdef RT_USING_FINSH |