From e20fb2f5b2130093191f818d307bb9cc30b0bc28 Mon Sep 17 00:00:00 2001 From: aozima Date: Tue, 6 Feb 2018 18:59:24 +0800 Subject: [PATCH] [examples] update: 1. cleanup for posix dfs_net. 2. fixed recv buf overwrite. 3. format code. --- examples/network/chargen.c | 49 ++++--- examples/network/tcpclient.c | 16 +-- examples/network/tcpsendpacket.c | 17 +-- examples/network/tcpserver.c | 223 ++++++++++++++++--------------- examples/network/udpclient.c | 60 ++++----- examples/network/udpserver.c | 127 +++++++++--------- 6 files changed, 254 insertions(+), 238 deletions(-) diff --git a/examples/network/chargen.c b/examples/network/chargen.c index f6a2879cbd..7db47da76f 100644 --- a/examples/network/chargen.c +++ b/examples/network/chargen.c @@ -1,7 +1,14 @@ #include -#include -#include -#include +#include + +#ifdef RT_USING_DFS_NET +#include // only dfs_net +#include +#else +#define read lwip_read +#define write lwip_write +#endif /* RT_USING_DFS_NET */ + #include "netdb.h" #define MAX_SERV 32 /* Maximum number of chargen services. Don't need too many */ @@ -52,16 +59,16 @@ static void chargen_thread(void *arg) if (bind(listenfd, (struct sockaddr *) &chargen_saddr, sizeof(chargen_saddr)) == -1) LWIP_ASSERT("chargen_thread(): Socket bind failed.", 0); - + /* Put socket into listening mode */ if (listen(listenfd, MAX_SERV) == -1) LWIP_ASSERT("chargen_thread(): Listen failed.", 0); - + /* Wait forever for network input: This could be connections or data */ for (;;) { - maxfdp1 = listenfd+1; + maxfdp1 = listenfd + 1; /* Determine what sockets need to be in readset */ FD_ZERO(&readset); @@ -78,7 +85,7 @@ static void chargen_thread(void *arg) /* Wait for data or a new connection */ i = select(maxfdp1, &readset, &writeset, 0, 0); - if (i == 0) continue; + if (i == 0) continue; /* At least one descriptor is ready */ if (FD_ISSET(listenfd, &readset)) @@ -89,8 +96,8 @@ static void chargen_thread(void *arg) if (p_charcb) { p_charcb->socket = accept(listenfd, - (struct sockaddr *) &p_charcb->cliaddr, - &p_charcb->clilen); + (struct sockaddr *) &p_charcb->cliaddr, + &p_charcb->clilen); if (p_charcb->socket < 0) rt_free(p_charcb); else @@ -101,8 +108,8 @@ static void chargen_thread(void *arg) p_charcb->nextchar = 0x21; } } - else - { + else + { /* No memory to accept connection. Just accept and then close */ int sock; struct sockaddr cliaddr; @@ -113,6 +120,7 @@ static void chargen_thread(void *arg) closesocket(sock); } } + /* Go through list of connected clients and process data */ for (p_charcb = charcb_list; p_charcb; p_charcb = p_charcb->next) { @@ -124,17 +132,19 @@ static void chargen_thread(void *arg) if (do_read(p_charcb) < 0) break; } + if (FD_ISSET(p_charcb->socket, &writeset)) { char line[80]; char setchar = p_charcb->nextchar; - for( i = 0; i < 59; i++) + for (i = 0; i < 59; i++) { line[i] = setchar; if (++setchar == 0x7f) setchar = 0x21; } + line[i] = 0; strcat(line, "\n\r"); if (write(p_charcb->socket, line, strlen(line)) < 0) @@ -142,6 +152,7 @@ static void chargen_thread(void *arg) close_chargen(p_charcb); break; } + if (++p_charcb->nextchar == 0x7f) p_charcb->nextchar = 0x21; } @@ -202,19 +213,19 @@ static int do_read(struct charcb *p_charcb) void chargen_init(void) { - rt_thread_t chargen; + rt_thread_t chargen; - chargen = rt_thread_create(CHARGEN_THREAD_NAME, - chargen_thread, RT_NULL, - CHARGEN_THREAD_STACKSIZE, - CHARGEN_PRIORITY, 5); - if (chargen != RT_NULL) rt_thread_startup(chargen); + chargen = rt_thread_create(CHARGEN_THREAD_NAME, + chargen_thread, RT_NULL, + CHARGEN_THREAD_STACKSIZE, + CHARGEN_PRIORITY, 5); + if (chargen != RT_NULL) rt_thread_startup(chargen); } #ifdef RT_USING_FINSH #include void chargen() { - chargen_init(); + chargen_init(); } FINSH_FUNCTION_EXPORT(chargen, start chargen server); #endif diff --git a/examples/network/tcpclient.c b/examples/network/tcpclient.c index a8a9d2959c..20d14baebb 100644 --- a/examples/network/tcpclient.c +++ b/examples/network/tcpclient.c @@ -1,15 +1,12 @@ #include -//#include /* 为了解析主机名，需要包含netdb.h头文件 */ -//#include /* 使用BSD socket，需要包含sockets.h头文件 */ - -#include /* 使用BSD socket，需要包含sockets.h头文件 */ +#include /* 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 Client from RT-Thread."; /* 发送用到的数据 */ -void tcpclient(const char* url, int port) +void tcpclient(const char *url, int port) { int ret; char *recv_data; @@ -57,7 +54,7 @@ void tcpclient(const char* url, int port) return; } - while(1) + while (1) { /* 从sock连接中接收最大BUFSZ - 1字节数据 */ bytes_received = recv(sock, recv_data, BUFSZ - 1, 0); @@ -75,13 +72,14 @@ void tcpclient(const char* url, int port) { /* 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; } /* 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) + 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(sock); @@ -94,11 +92,11 @@ void tcpclient(const char* url, int port) else { /* 在控制终端显示收到的数据 */ - rt_kprintf("\nReceived data = %s " , recv_data); + rt_kprintf("\nReceived data = %s ", recv_data); } /* 发送数据到sock连接 */ - ret = send(sock,send_data,strlen(send_data), 0); + ret = send(sock, send_data, strlen(send_data), 0); if (ret < 0) { /* 接收失败，关闭这个连接 */ diff --git a/examples/network/tcpsendpacket.c b/examples/network/tcpsendpacket.c index e7c514806e..75134c19a2 100644 --- a/examples/network/tcpsendpacket.c +++ b/examples/network/tcpsendpacket.c @@ -1,8 +1,9 @@ #include -#include /* Ϊ˽Ҫnetdb.hͷļ */ -#include /* ʹBSD socketҪsockets.hͷļ */ -void tcp_senddata(const char* url, int port, int length) +#include /* Ϊ˽Ҫnetdb.hͷļ */ +#include /* ʹBSD socketҪsocket.hͷļ */ + +void tcp_senddata(const char *url, int port, int length) { struct hostent *host; int sock, err, result, timeout, index; @@ -27,7 +28,7 @@ void tcp_senddata(const char* url, int port, int length) timeout = 100; /* ÷ͳʱʱ100ms */ - lwip_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(timeout)); + setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(timeout)); /* ʼԤӵķ˵ַ */ server_addr.sin_family = AF_INET; server_addr.sin_port = htons(port); @@ -38,20 +39,20 @@ void tcp_senddata(const char* url, int port, int length) err = connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)); rt_kprintf("TCP thread connect error code: %d\n", err); - while(1) + while (1) { /* ݵsock */ result = send(sock, buffer_ptr, length, MSG_DONTWAIT); - if(result < 0) //ݷʹ + if (result < 0) //ݷʹ { rt_kprintf("TCP thread send error: %d\n", result); - lwip_close(sock); + closesocket(sock); /* رӣ´ */ rt_thread_delay(10); if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) - rt_kprintf("TCP Socket error:%d\n",sock); + rt_kprintf("TCP Socket error:%d\n", sock); err = connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)); rt_kprintf("TCP thread connect error code: %d\n", err); 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 -//#include /* 使用BSD Socket接口必须包含sockets.h这个头文件 */ -#include /* 使用BSD socket，需要包含sockets.h头文件 */ +#include /* 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 diff --git a/examples/network/udpclient.c b/examples/network/udpclient.c index c19a25fa6c..5060c9a087 100644 --- a/examples/network/udpclient.c +++ b/examples/network/udpclient.c @@ -5,44 +5,44 @@ #include "netdb.h" const char send_data[] = "This is UDP Client from RT-Thread.\n"; /* 发送用到的数据 */ -void udpclient(const char* url, int port, int count) +void udpclient(const char *url, int port, int count) { - int sock; - struct hostent *host; - struct sockaddr_in server_addr; + int sock; + struct hostent *host; + struct sockaddr_in server_addr; - /* 通过函数入口参数url获得host地址（如果是域名，会做域名解析） */ - host= (struct hostent *) gethostbyname(url); + /* 通过函数入口参数url获得host地址（如果是域名，会做域名解析） */ + host = (struct hostent *) gethostbyname(url); - /* 创建一个socket，类型是SOCK_DGRAM，UDP类型 */ - if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) - { - rt_kprintf("Socket error\n"); - return; - } + /* 创建一个socket，类型是SOCK_DGRAM，UDP类型 */ + if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) + { + rt_kprintf("Socket error\n"); + return; + } - /* 初始化预连接的服务端地址 */ - server_addr.sin_family = AF_INET; - server_addr.sin_port = htons(port); - server_addr.sin_addr = *((struct in_addr *)host->h_addr); - rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero)); + /* 初始化预连接的服务端地址 */ + server_addr.sin_family = AF_INET; + server_addr.sin_port = htons(port); + server_addr.sin_addr = *((struct in_addr *)host->h_addr); + rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero)); - /* 总计发送count次数据 */ - while (count) - { - /* 发送数据到服务远端 */ - sendto(sock, send_data, strlen(send_data), 0, - (struct sockaddr *)&server_addr, sizeof(struct sockaddr)); + /* 总计发送count次数据 */ + while (count) + { + /* 发送数据到服务远端 */ + sendto(sock, send_data, strlen(send_data), 0, + (struct sockaddr *)&server_addr, sizeof(struct sockaddr)); - /* 线程休眠一段时间 */ - rt_thread_delay(50); + /* 线程休眠一段时间 */ + rt_thread_delay(50); - /* 计数值减一 */ - count --; - } + /* 计数值减一 */ + count --; + } - /* 关闭这个socket */ - closesocket(sock); + /* 关闭这个socket */ + closesocket(sock); } #ifdef RT_USING_FINSH diff --git a/examples/network/udpserver.c b/examples/network/udpserver.c index 3b5abd976b..a684e9cd0c 100644 --- a/examples/network/udpserver.c +++ b/examples/network/udpserver.c @@ -1,85 +1,84 @@ #include -//#include /* 使用BSD socket，需要包含sockets.h头文件 */ -#include /* 使用BSD socket，需要包含sockets.h头文件 */ + +#include /* 使用BSD socket，需要包含socket.h头文件 */ #include "netdb.h" +#define BUFSZ 1024 -#define BUFSZ 1024 - -void udpserv(void* paramemter) +static void udpserv(void *paramemter) { - int sock; - int bytes_read; - char *recv_data; - rt_uint32_t addr_len; - struct sockaddr_in server_addr, client_addr; + int sock; + int bytes_read; + char *recv_data; + socklen_t addr_len; + struct sockaddr_in server_addr, client_addr; - /* 分配接收用的数据缓冲 */ - recv_data = rt_malloc(BUFSZ); - if (recv_data == RT_NULL) - { - /* 分配内存失败，返回 */ - rt_kprintf("No memory\n"); - return; - } + /* 分配接收用的数据缓冲 */ + recv_data = rt_malloc(BUFSZ); + if (recv_data == RT_NULL) + { + /* 分配内存失败，返回 */ + rt_kprintf("No memory\n"); + return; + } - /* 创建一个socket，类型是SOCK_DGRAM，UDP类型 */ - if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) - { - rt_kprintf("Socket error\n"); + /* 创建一个socket，类型是SOCK_DGRAM，UDP类型 */ + if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) + { + rt_kprintf("Socket error\n"); - /* 释放接收用的数据缓冲 */ - rt_free(recv_data); - return; - } + /* 释放接收用的数据缓冲 */ + 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); - server_addr.sin_addr.s_addr = INADDR_ANY; - rt_memset(&(server_addr.sin_zero),0, 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); + 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) - { - /* 绑定地址失败 */ - rt_kprintf("Bind error\n"); + /* 绑定socket到服务端地址 */ + if (bind(sock, (struct sockaddr *)&server_addr, + sizeof(struct sockaddr)) == -1) + { + /* 绑定地址失败 */ + rt_kprintf("Bind error\n"); - /* 释放接收用的数据缓冲 */ - rt_free(recv_data); - return; - } + /* 释放接收用的数据缓冲 */ + rt_free(recv_data); + return; + } - addr_len = sizeof(struct sockaddr); - rt_kprintf("UDPServer Waiting for client on port 5000...\n"); + addr_len = sizeof(struct sockaddr); + rt_kprintf("UDPServer Waiting for client on port 5000...\n"); - while (1) - { - /* 从sock中收取最大BUFSZ - 1字节数据 */ - bytes_read = recvfrom(sock, recv_data, BUFSZ - 1, 0, - (struct sockaddr *)&client_addr, &addr_len); - /* UDP不同于TCP，它基本不会出现收取的数据失败的情况，除非设置了超时等待 */ + while (1) + { + /* 从sock中收取最大BUFSZ - 1字节数据 */ + bytes_read = recvfrom(sock, recv_data, BUFSZ - 1, 0, + (struct sockaddr *)&client_addr, &addr_len); + /* UDP不同于TCP，它基本不会出现收取的数据失败的情况，除非设置了超时等待 */ - recv_data[bytes_read] = '\0'; /* 把末端清零 */ + recv_data[bytes_read] = '\0'; /* 把末端清零 */ - /* 输出接收的数据 */ - rt_kprintf("\n(%s , %d) said : ",inet_ntoa(client_addr.sin_addr), - ntohs(client_addr.sin_port)); - rt_kprintf("%s", recv_data); + /* 输出接收的数据 */ + rt_kprintf("\n(%s , %d) said : ", inet_ntoa(client_addr.sin_addr), + ntohs(client_addr.sin_port)); + rt_kprintf("%s", recv_data); - /* 如果接收数据是exit，退出 */ - if (strcmp(recv_data, "exit") == 0) - { - closesocket(sock); + /* 如果接收数据是exit，退出 */ + if (strcmp(recv_data, "exit") == 0) + { + closesocket(sock); - /* 释放接收用的数据缓冲 */ - rt_free(recv_data); - break; - } - } + /* 释放接收用的数据缓冲 */ + rt_free(recv_data); + break; + } + } - return; + return; } #ifdef RT_USING_FINSH