diff --git a/examples/network/tcpclient.c b/examples/network/tcpclient.c index 20d14baebb8f59e80b0f32a72f12d7e122fbe544..d4c96f893abac32fdb6c097a09d97b2cf3312c05 100644 --- a/examples/network/tcpclient.c +++ b/examples/network/tcpclient.c @@ -1,27 +1,60 @@ #include +#include +#if !defined(SAL_USING_POSIX) +#error "Please enable SAL_USING_POSIX!" +#else +#include +#include +#endif #include /* 使用BSD socket，需要包含socket.h头文件 */ #include "netdb.h" +#define DEBUG_TCP_CLIENT + +#define DBG_ENABLE +#define DBG_SECTION_NAME "TCP" +#ifdef DEBUG_TCP_CLIENT +#define DBG_LEVEL DBG_LOG +#else +#define DBG_LEVEL DBG_INFO /* DBG_ERROR */ +#endif +#define DBG_COLOR +#include + #define BUFSZ 1024 +static int started = 0; +static int is_running = 0; +static char url[256]; +static int port = 8080; 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) + +static void tcpclient(void *arg) { int ret; char *recv_data; - struct hostent *host; - int sock, bytes_received; + int bytes_received; + int sock = -1; + struct hostent *host = RT_NULL; struct sockaddr_in server_addr; + struct timeval timeout; + fd_set readset; + /* 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 = gethostbyname(url); + if (host == RT_NULL) + { + LOG_E("Get host by name failed!"); + return; + } /* 分配用于存放接收数据的缓冲 */ recv_data = rt_malloc(BUFSZ); if (recv_data == RT_NULL) { - rt_kprintf("No memory\n"); + LOG_E("No memory"); return; } @@ -29,11 +62,8 @@ void tcpclient(const char *url, int port) if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { /* 创建socket失败 */ - rt_kprintf("Socket error\n"); - - /* 释放接收缓冲 */ - rt_free(recv_data); - return; + LOG_E("Create socket error"); + goto __exit; } /* 初始化预连接的服务端地址 */ @@ -46,78 +76,159 @@ void tcpclient(const char *url, int port) if (connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1) { /* 连接失败 */ - rt_kprintf("Connect fail!\n"); - closesocket(sock); - - /*释放接收缓冲 */ - rt_free(recv_data); - return; + LOG_E("Connect fail!"); + goto __exit; } - while (1) + started = 1; + is_running = 1; + + timeout.tv_sec = 3; + timeout.tv_usec = 0; + + while (is_running) { + FD_ZERO(&readset); + FD_SET(sock, &readset); + + /* Wait for read */ + if (select(sock + 1, &readset, RT_NULL, RT_NULL, &timeout) == 0) + continue; + /* 从sock连接中接收最大BUFSZ - 1字节数据 */ bytes_received = recv(sock, recv_data, BUFSZ - 1, 0); if (bytes_received < 0) { /* 接收失败，关闭这个连接 */ - closesocket(sock); - rt_kprintf("\nreceived error,close the socket.\r\n"); - - /* 释放接收缓冲 */ - rt_free(recv_data); - break; + LOG_E("Received error, close the socket."); + goto __exit; } 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"); - + LOG_W("Received warning, recv function return 0."); 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) - { - /* 如果是首字母是q或Q，关闭这个连接 */ - closesocket(sock); - rt_kprintf("\n got a 'q' or 'Q',close the socket.\r\n"); - - /* 释放接收缓冲 */ - rt_free(recv_data); - break; - } else { - /* 在控制终端显示收到的数据 */ - rt_kprintf("\nReceived data = %s ", recv_data); + /* 有接收到数据，把末端清零 */ + recv_data[bytes_received] = '\0'; + + if (rt_strcmp(recv_data, "q") == 0 || rt_strcmp(recv_data, "Q") == 0) + { + /* 如果是首字母是q或Q，关闭这个连接 */ + LOG_I("Got a 'q' or 'Q', close the socket."); + goto __exit; + } + else + { + /* 在控制终端显示收到的数据 */ + LOG_D("Received 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, rt_strlen(send_data), 0); if (ret < 0) { /* 接收失败，关闭这个连接 */ - closesocket(sock); - rt_kprintf("\nsend error,close the socket.\r\n"); - - rt_free(recv_data); - break; + LOG_I("send error, close the socket."); + goto __exit; } 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"); + LOG_W("Send warning, send function return 0."); + } + } + +__exit: + if (recv_data) + { + rt_free(recv_data); + recv_data = RT_NULL; + } + if (sock >= 0) + { + closesocket(sock); + sock = -1; + } + started = 0; + is_running = 0; + return; +} + +static void usage(void) +{ + rt_kprintf("Usage: tcpclient -h -p \n"); + rt_kprintf(" tcpclient --stop\n"); + rt_kprintf(" tcpclient --help\n"); + rt_kprintf("\n"); + rt_kprintf("Miscellaneous:\n"); + rt_kprintf(" -h Specify host address\n"); + rt_kprintf(" -p Specify the host port number\n"); + rt_kprintf(" --stop Stop tcpclient program\n"); + rt_kprintf(" --help Print help information\n"); +} + +static void tcpclient_test(int argc, char** argv) +{ + rt_thread_t tid; + + if (argc == 1 || argc > 5) + { + LOG_I("Please check the command you entered!\n"); + goto __usage; + } + else + { + if (rt_strcmp(argv[1], "--help") == 0) + { + goto __usage; + } + else if (rt_strcmp(argv[1], "--stop") == 0) + { + is_running = 0; + return; + } + else if (rt_strcmp(argv[1], "-h") == 0 && rt_strcmp(argv[3], "-p") == 0) + { + if (started) + { + LOG_I("The tcpclient has started!"); + LOG_I("Please stop tcpclient firstly, by: tcpclient --stop"); + return; + } + + if (rt_strlen(argv[2]) > sizeof(url)) + { + LOG_E("The input url is too long, max %d bytes!", sizeof(url)); + return; + } + rt_memset(url, 0x0, sizeof(url)); + rt_strncpy(url, argv[2], rt_strlen(argv[2])); + port = atoi(argv[4]); + } + else + { + goto __usage; } } + tid = rt_thread_create("tcp_client", + tcpclient, RT_NULL, + 2048, RT_THREAD_PRIORITY_MAX/3, 20); + if (tid != RT_NULL) + { + rt_thread_startup(tid); + } return; + +__usage: + usage(); } #ifdef RT_USING_FINSH -#include -/* 输出tcpclient函数到finsh shell中 */ -FINSH_FUNCTION_EXPORT(tcpclient, startup tcp client); +MSH_CMD_EXPORT_ALIAS(tcpclient_test, tcpclient, + Start a tcp client. Help: tcpclient --help); #endif diff --git a/examples/network/tcpserver.c b/examples/network/tcpserver.c index 97292449a0f246811efd2b00fcec4f7bed9a0e92..264b6f7c83bd218efa3b710a7dfaa904889e0440 100644 --- a/examples/network/tcpserver.c +++ b/examples/network/tcpserver.c @@ -1,151 +1,263 @@ #include +#include +#if !defined(SAL_USING_POSIX) +#error "Please enable SAL_USING_POSIX!" +#else +#include +#include +#endif #include /* 使用BSD socket，需要包含socket.h头文件 */ #include "netdb.h" +#define DEBUG_TCP_SERVER + +#define DBG_ENABLE +#define DBG_SECTION_NAME "TCP" +#ifdef DEBUG_TCP_SERVER +#define DBG_LEVEL DBG_LOG +#else +#define DBG_LEVEL DBG_INFO /* DBG_ERROR */ +#endif +#define DBG_COLOR +#include + #define BUFSZ (1024) +static int started = 0; +static int is_running = 0; +static int port = 5000; static const char send_data[] = "This is TCP Server from RT-Thread."; /* 发送用到的数据 */ -static void tcpserv(void *parameter) + +static void tcpserv(void *arg) { + 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; + + struct timeval timeout; + fd_set readset, readset_c; + socklen_t sin_size = sizeof(struct sockaddr_in); 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"); + LOG_E("No memory"); 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) + if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -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; + LOG_E("Create socket error"); + goto __exit; } /* 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_port = htons(port); /* 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)); + rt_memset(&(server_addr.sin_zero), 0x0, 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"); - - /* 释放已分配的接收缓冲 */ - rt_free(recv_data); - return; + LOG_E("Unable to bind"); + goto __exit; } /* 在socket上进行监听 */ - if (listen(sock, 5) == -1) + if (listen(sock, 10) == -1) { - rt_kprintf("Listen error\n"); - - /* release recv buffer */ - rt_free(recv_data); - return; + LOG_E("Listen error"); + goto __exit; } - rt_kprintf("\nTCPServer Waiting for client on port 5000...\n"); - while (stop != RT_TRUE) + LOG_I("\nTCPServer Waiting for client on port %d...\n", port); + + started = 1; + is_running = 1; + + timeout.tv_sec = 3; + timeout.tv_usec = 0; + + while (is_running) { - sin_size = sizeof(struct sockaddr_in); + FD_ZERO(&readset); + FD_SET(sock, &readset); + + LOG_I("Waiting for a new connection..."); + + /* Wait for read or write */ + if (select(sock + 1, &readset, RT_NULL, RT_NULL, &timeout) == 0) + continue; /* 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); + LOG_E("accept connection failed! errno = %d", 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", + LOG_I("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) + while (is_running) { - /* 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) - { - /* 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"); - } + FD_ZERO(&readset_c); + FD_SET(connected, &readset_c); + + /* Wait for read or write */ + if (select(connected + 1, &readset_c, RT_NULL, RT_NULL, &timeout) == 0) + 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 */ + LOG_E("Received error, close the connect."); closesocket(connected); + connected = -1; 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; + LOG_W("Received warning, recv function return 0."); + 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) + else { - /* 如果是首字母是q或Q，关闭这个连接 */ - 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 */ + LOG_I("Got a 'q' or 'Q', close the connect."); + closesocket(connected); + connected = -1; + 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); + connected = -1; + goto __exit; + } + else + { + /* 在控制终端显示收到的数据 */ + LOG_D("Received data = %s", recv_data); + } } - else if (strcmp(recv_data, "exit") == 0) + + /* 发送数据到connected socket */ + ret = send(connected, send_data, rt_strlen(send_data), 0); + if (ret < 0) { - /* 如果接收的是exit，则关闭整个服务端 */ + LOG_E("send error, close the connect."); closesocket(connected); - stop = RT_TRUE; + connected = -1; break; } - else + else if (ret == 0) { - /* 在控制终端显示收到的数据 */ - rt_kprintf("RECEIVED DATA = %s \n", recv_data); + /* 打印send函数返回值为0的警告信息 */ + LOG_W("Send warning, send function return 0."); } } } - /* 退出服务 */ - closesocket(sock); +__exit: + if (recv_data) + { + rt_free(recv_data); + recv_data = RT_NULL; + } + if (connected >= 0) + { + closesocket(connected); + connected = -1; + } + if (sock >= 0) + { + closesocket(sock); + sock = -1; + } + started = 0; + is_running = 0; + return; +} + +static void usage(void) +{ + rt_kprintf("Usage: tcpserver -p \n"); + rt_kprintf(" tcpserver --stop\n"); + rt_kprintf(" tcpserver --help\n"); + rt_kprintf("\n"); + rt_kprintf("Miscellaneous:\n"); + rt_kprintf(" -p Specify the host port number\n"); + rt_kprintf(" --stop Stop tcpserver program\n"); + rt_kprintf(" --help Print help information\n"); +} + +static void tcpserver_test(int argc, char** argv) +{ + rt_thread_t tid; + + if (argc == 1 || argc > 3) + { + LOG_I("Please check the command you entered!\n"); + goto __usage; + } + else + { + if (rt_strcmp(argv[1], "--help") == 0) + { + goto __usage; + } + else if (rt_strcmp(argv[1], "--stop") == 0) + { + is_running = 0; + return; + } + else if (rt_strcmp(argv[1], "-p") == 0) + { + if (started) + { + LOG_I("The tcpclient has started!"); + LOG_I("Please stop tcpclient firstly, by: tcpclient --stop"); + return; + } + + port = atoi(argv[2]); + } + else + { + goto __usage; + } + } - /* 释放接收缓冲 */ - rt_free(recv_data); + tid = rt_thread_create("tcp_serv", + tcpserv, RT_NULL, + 2048, RT_THREAD_PRIORITY_MAX/3, 20); + if (tid != RT_NULL) + { + rt_thread_startup(tid); + } + return; - return ; +__usage: + usage(); } #ifdef RT_USING_FINSH -#include -/* 输出tcpserv函数到finsh shell中 */ -FINSH_FUNCTION_EXPORT(tcpserv, startup tcp server); +MSH_CMD_EXPORT_ALIAS(tcpserver_test, tcpserver, + Start a tcp server. Help: tcpserver --help); #endif diff --git a/examples/network/udpclient.c b/examples/network/udpclient.c index 5060c9a08730bb0d51fa1309471244f817b89896..40542b9fa1628085a9b5d23a01682acd87004078 100644 --- a/examples/network/udpclient.c +++ b/examples/network/udpclient.c @@ -1,11 +1,28 @@ #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 "netdb.h" +#define DEBUG_UDP_CLIENT + +#define DBG_ENABLE +#define DBG_SECTION_NAME "UDP" +#ifdef DEBUG_UDP_CLIENT +#define DBG_LEVEL DBG_LOG +#else +#define DBG_LEVEL DBG_INFO /* DBG_ERROR */ +#endif +#define DBG_COLOR +#include + +static int started = 0; +static int is_running = 0; +static char url[256]; +static int port = 8080; +static int count = 10; 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) + +static void udpclient(void *arg) { int sock; struct hostent *host; @@ -13,11 +30,16 @@ void udpclient(const char *url, int port, int count) /* 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); + if (host == RT_NULL) + { + LOG_E("Get host by name failed!"); + return; + } /* 创建一个socket，类型是SOCK_DGRAM，UDP类型 */ - if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1) + if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1) { - rt_kprintf("Socket error\n"); + LOG_E("Create socket error"); return; } @@ -27,26 +49,115 @@ void udpclient(const char *url, int port, int count) server_addr.sin_addr = *((struct in_addr *)host->h_addr); rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero)); + started = 1; + is_running = 1; + /* 总计发送count次数据 */ - while (count) + while (count && is_running) { /* 发送数据到服务远端 */ - sendto(sock, send_data, strlen(send_data), 0, + sendto(sock, send_data, rt_strlen(send_data), 0, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)); /* 线程休眠一段时间 */ - rt_thread_delay(50); + rt_thread_mdelay(1000); /* 计数值减一 */ count --; } + if (count == 0) + { + LOG_I("UDP client send data finished!"); + } + /* 关闭这个socket */ - closesocket(sock); + if (sock >= 0) + { + closesocket(sock); + sock = -1; + } + started = 0; + is_running = 0; +} + +static void usage(void) +{ + rt_kprintf("Usage: udpclient -h -p [--cnt] [count]\n"); + rt_kprintf(" udpclient --stop\n"); + rt_kprintf(" udpclient --help\n"); + rt_kprintf("\n"); + rt_kprintf("Miscellaneous:\n"); + rt_kprintf(" -h Specify host address\n"); + rt_kprintf(" -p Specify the host port number\n"); + rt_kprintf(" --cnt Specify the send data count\n"); + rt_kprintf(" --stop Stop tcpclient program\n"); + rt_kprintf(" --help Print help information\n"); +} + +static void udpclient_test(int argc, char** argv) +{ + rt_thread_t tid; + + if (argc == 1 || argc > 7) + { + LOG_I("Please check the command you entered!\n"); + goto __usage; + } + else + { + if (rt_strcmp(argv[1], "--help") == 0) + { + goto __usage; + } + else if (rt_strcmp(argv[1], "--stop") == 0) + { + is_running = 0; + return; + } + else if (rt_strcmp(argv[1], "-h") == 0 && rt_strcmp(argv[3], "-p") == 0) + { + if (started) + { + LOG_I("The tcpclient has started!"); + LOG_I("Please stop tcpclient firstly, by: tcpclient --stop"); + return; + } + + if (argc == 7 && rt_strcmp(argv[6], "--cnt") == 0) + { + count = atoi(argv[7]); + } + + if (rt_strlen(argv[2]) > sizeof(url)) + { + LOG_E("The input url is too long, max %d bytes!", sizeof(url)); + return; + } + rt_memset(url, 0x0, sizeof(url)); + rt_strncpy(url, argv[2], rt_strlen(argv[2])); + port = atoi(argv[4]); + } + else + { + goto __usage; + } + } + + tid = rt_thread_create("udp_client", + udpclient, RT_NULL, + 2048, RT_THREAD_PRIORITY_MAX/3, 20); + if (tid != RT_NULL) + { + rt_thread_startup(tid); + } + return; + +__usage: + usage(); } #ifdef RT_USING_FINSH -#include -/* 输出udpclient函数到finsh shell中 */ -FINSH_FUNCTION_EXPORT(udpclient, startup udp client); +MSH_CMD_EXPORT_ALIAS(udpclient_test, udpclient, + Start a udp client. Help: udpclient --help); #endif diff --git a/examples/network/udpserver.c b/examples/network/udpserver.c index a684e9cd0cb4bbbcbdada52b84e706f20e8b2be4..c40a1972b45c07c355b7bd4b3701424f522ea1bc 100644 --- a/examples/network/udpserver.c +++ b/examples/network/udpserver.c @@ -1,10 +1,33 @@ #include +#include +#if !defined(SAL_USING_POSIX) +#error "Please enable SAL_USING_POSIX!" +#else +#include +#include +#endif #include /* 使用BSD socket，需要包含socket.h头文件 */ #include "netdb.h" +#define DEBUG_UDP_SERVER + +#define DBG_ENABLE +#define DBG_SECTION_NAME "UDP" +#ifdef DEBUG_UDP_SERVER +#define DBG_LEVEL DBG_LOG +#else +#define DBG_LEVEL DBG_INFO /* DBG_ERROR */ +#endif +#define DBG_COLOR +#include + #define BUFSZ 1024 +static int started = 0; +static int is_running = 0; +static int port = 5000; + static void udpserv(void *paramemter) { int sock; @@ -13,28 +36,27 @@ static void udpserv(void *paramemter) socklen_t addr_len; struct sockaddr_in server_addr, client_addr; + struct timeval timeout; + fd_set readset; + /* 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"); + LOG_E("No memory"); 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"); - - /* 释放接收用的数据缓冲 */ - rt_free(recv_data); - return; + LOG_E("Create socket error"); + goto __exit; } /* 初始化服务端地址 */ server_addr.sin_family = AF_INET; - server_addr.sin_port = htons(5000); + server_addr.sin_port = htons(port); server_addr.sin_addr.s_addr = INADDR_ANY; rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero)); @@ -42,47 +64,134 @@ static void udpserv(void *paramemter) 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; + LOG_E("Unable to bind"); + goto __exit; } addr_len = sizeof(struct sockaddr); - rt_kprintf("UDPServer Waiting for client on port 5000...\n"); + LOG_I("UDPServer Waiting for client on port %d...", port); - while (1) + started = 1; + is_running = 1; + + timeout.tv_sec = 3; + timeout.tv_usec = 0; + + while (is_running) { + FD_ZERO(&readset); + FD_SET(sock, &readset); + + /* Wait for read or write */ + if (select(sock + 1, &readset, RT_NULL, RT_NULL, &timeout) == 0) + continue; + /* 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 */ + if (bytes_read < 0) + { + LOG_E("Received error, close the connect."); + goto __exit; + } + else if (bytes_read == 0) + { + LOG_W("Received warning, recv function return 0."); + continue; + } + else + { + 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 */ + LOG_D("Received data = %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) + { + goto __exit; + } + } + } - /* 如果接收数据是exit，退出 */ - if (strcmp(recv_data, "exit") == 0) - { - closesocket(sock); +__exit: + if (recv_data) + { + rt_free(recv_data); + recv_data = RT_NULL; + } + if (sock >= 0) + { + closesocket(sock); + sock = -1; + } + started = 0; + is_running = 0; +} - /* 释放接收用的数据缓冲 */ - rt_free(recv_data); - break; +static void usage(void) +{ + rt_kprintf("Usage: udpserver -p \n"); + rt_kprintf(" udpserver --stop\n"); + rt_kprintf(" udpserver --help\n"); + rt_kprintf("\n"); + rt_kprintf("Miscellaneous:\n"); + rt_kprintf(" -p Specify the host port number\n"); + rt_kprintf(" --stop Stop udpserver program\n"); + rt_kprintf(" --help Print help information\n"); +} + +static void udpserver_test(int argc, char** argv) +{ + rt_thread_t tid; + + if (argc == 1 || argc > 3) + { + LOG_I("Please check the command you entered!\n"); + goto __usage; + } + else + { + if (rt_strcmp(argv[1], "--help") == 0) + { + goto __usage; + } + else if (rt_strcmp(argv[1], "--stop") == 0) + { + is_running = 0; + return; + } + else if (rt_strcmp(argv[1], "-p") == 0) + { + if (started) + { + LOG_I("The tcpclient has started!"); + LOG_I("Please stop tcpclient firstly, by: tcpclient --stop"); + return; + } + + port = atoi(argv[2]); + } + else + { + goto __usage; } } + tid = rt_thread_create("udp_serv", + udpserv, RT_NULL, + 2048, RT_THREAD_PRIORITY_MAX/3, 20); + if (tid != RT_NULL) + { + rt_thread_startup(tid); + } return; + +__usage: + usage(); } #ifdef RT_USING_FINSH -#include -/* 输出udpserv函数到finsh shell中 */ -FINSH_FUNCTION_EXPORT(udpserv, startup udp server); +MSH_CMD_EXPORT_ALIAS(udpserver_test, udpserver, + Start a udp server. Help: udpserver --help); #endif