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[examples][network] 更新 tcp client & server 例程 

Signed-off-by: MurphyZhao <d2014zjt@163.com>
This commit is contained in:
MurphyZhao 2018-11-05 14:34:40 +08:00
parent c7d9daefaa
commit 6c62f5d9fe
2 changed files with 349 additions and 126 deletions
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197
examples/network/tcpclient.c
View File

@ -1,27 +1,60 @@
#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;
}
else
{
/* 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 (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 */
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;
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 */
rt_kprintf("\nReceived data = %s ", recv_data);
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)
{
LOG_I("Usage: tcpclient -h <host> -p <port>");
LOG_I(" tcpclient --stop");
LOG_I(" tcpclient --help");
LOG_I("");
LOG_I("Miscellaneous:");
LOG_I(" -h Specify host address");
LOG_I(" -p Specify the host port number");
LOG_I(" --stop Stop tcpclient program");
LOG_I(" --help Print help information");
}
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

236
examples/network/tcpserver.c
View File

@ -1,151 +1,263 @@
#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;
}
else
{
/* 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);
stop = RT_TRUE;
break;
connected = -1;
goto __exit;
}
else
{
/* 在控制终端显示收到的数据 */
rt_kprintf("RECEIVED DATA = %s \n", recv_data);
LOG_D("Received data = %s", recv_data);
}
}
/* 发送数据到connected socket */
ret = send(connected, send_data, rt_strlen(send_data), 0);
if (ret < 0)
{
LOG_E("send error, close the connect.");
closesocket(connected);
connected = -1;
break;
}
else if (ret == 0)
{
/* 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);
/* 释放接收缓冲 */
__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;
}
return ;
static void usage(void)
{
LOG_I("Usage: tcpserver -p <port>");
LOG_I(" tcpserver --stop");
LOG_I(" tcpserver --help");
LOG_I("");
LOG_I("Miscellaneous:");
LOG_I(" -p Specify the host port number");
LOG_I(" --stop Stop tcpserver program");
LOG_I(" --help Print help information");
}
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;
}
}
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;
__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