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未验证 提交 1b351ff9 编写于 作者: B Bernard Xiong 提交者： GitHub
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Merge pull request #1947 from zhaojuntao/update-examples 

[examples][network] 更新 tcp/udp client & server 例程
上级 2d4704b8 e9c795e8
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examples/network/tcpclient.c
浏览文件 @ 1b351ff9
#include <rtthread.h>
#include <string.h>
#if !defined(SAL_USING_POSIX)
#error "Please enable SAL_USING_POSIX!"
#else
#include <sys/time.h>
#include <sys/select.h>
#endif
#include <sys/socket.h> /* 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 <rtdbg.h>
#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 <host> -p <port>\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 <finsh.h>
/* 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
examples/network/tcpserver.c
浏览文件 @ 1b351ff9
#include <rtthread.h>
#include <string.h>
#if !defined(SAL_USING_POSIX)
#error "Please enable SAL_USING_POSIX!"
#else
#include <sys/time.h>
#include <sys/select.h>
#endif
#include <sys/socket.h> /* 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 <rtdbg.h>
#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 <port>\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 <finsh.h>
/* 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
examples/network/udpclient.c
浏览文件 @ 1b351ff9
#include <rtthread.h>
//#include <lwip/netdb.h> /* 为了解析主机名，需要包含netdb.h头文件 */
//#include <lwip/sockets.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 <rtdbg.h>
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 <host> -p <port> [--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 <finsh.h>
/* 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
examples/network/udpserver.c
浏览文件 @ 1b351ff9
#include <rtthread.h>
#include <string.h>
#if !defined(SAL_USING_POSIX)
#error "Please enable SAL_USING_POSIX!"
#else
#include <sys/time.h>
#include <sys/select.h>
#endif
#include <sys/socket.h> /* 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 <rtdbg.h>
#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 <port>\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 <finsh.h>
/* 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
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