improve and add comments in examples/network/ including tcpserver.c
tcpclient.c udpserver.c and udpclient.c Formatting Co-authored-by: Man, Jianting (Meco) <920369182@qq.com>
This commit is contained in:
ChungHsuanChen
guo
parent
4db9cfbebe
commit
382e19ccbf
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@ -1,10 +1,11 @@
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/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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* Copyright (c) 2006-2022, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2022-01-24 ChungHsuan improve code comments
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*/
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#include <rtthread.h>
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@ -16,7 +17,7 @@
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#include <sys/time.h>
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#include <sys/select.h>
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#endif
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#include <sys/socket.h> /* 使用BSD socket，需要包含socket.h头文件 */
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#include <sys/socket.h> /* socket.h header file is needed when using BSD socket */ /* 使用BSD socket，需要包含socket.h头文件 */
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#include "netdb.h"
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#define DEBUG_TCP_CLIENT
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@ -35,8 +36,11 @@ static int started = 0;
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static int is_running = 0;
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static char url[256];
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static int port = 8080;
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static const char send_data[] = "This is TCP Client from RT-Thread."; /* 发送用到的数据 */
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static const char send_data[] = "This is TCP Client from RT-Thread."; /* The message be sent */ /* 发送用到的数据 */
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/**
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* @brief This function is for creating a tcp client on RT-Thread
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*/
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static void tcpclient(void *arg)
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{
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int ret;
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@ -48,7 +52,7 @@ static void tcpclient(void *arg)
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struct timeval timeout;
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fd_set readset;
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/* Get host address by parameter url(Domain name resolution if input domain) */
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/* 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） */
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host = gethostbyname(url);
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if (host == RT_NULL)
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@ -56,7 +60,7 @@ static void tcpclient(void *arg)
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LOG_E("Get host by name failed!");
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return;
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}
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/* Allocate space for recv_data */
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/* 分配用于存放接收数据的缓冲 */
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recv_data = rt_malloc(BUFSZ);
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if (recv_data == RT_NULL)
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@ -64,24 +68,26 @@ static void tcpclient(void *arg)
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LOG_E("No memory");
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return;
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}
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/* Create a socket and set it to SOCK_STREAM(TCP) */
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/* 创建一个socket，类型是SOCKET_STREAM，TCP类型 */
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if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)
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{
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/* Failed on creatinf socket */
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/* 创建socket失败 */
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LOG_E("Create socket error");
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goto __exit;
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}
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/* Initialize server side address */
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/* 初始化预连接的服务端地址 */
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server_addr.sin_family = AF_INET;
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server_addr.sin_port = htons(port);
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server_addr.sin_addr = *((struct in_addr *)host->h_addr);
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rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero));
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/* Connect to server */
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/* 连接到服务端 */
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if (connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1)
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{
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/*Failed on connecting to server*/
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/* 连接失败 */
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LOG_E("Connect fail!");
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goto __exit;
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@ -101,49 +107,56 @@ static void tcpclient(void *arg)
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/* Wait for read */
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if (select(sock + 1, &readset, RT_NULL, RT_NULL, &timeout) == 0)
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continue;
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/* Receive the maximum size 1024 bytes from socket */
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/* 从sock连接中接收最大BUFSZ - 1字节数据 */
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bytes_received = recv(sock, recv_data, BUFSZ - 1, 0);
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if (bytes_received < 0)
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{
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/* Receive failed and close the connection */
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/* 接收失败，关闭这个连接 */
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LOG_E("Received error, close the socket.");
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goto __exit;
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}
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else if (bytes_received == 0)
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{
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/* Print warning message when recv function return 0 */
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/* 打印recv函数返回值为0的警告信息 */
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LOG_W("Received warning, recv function return 0.");
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continue;
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}
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else
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{
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/* Receive data sucessfully and append '\0' at the end of message */
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/* 有接收到数据，把末端清零 */
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recv_data[bytes_received] = '\0';
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if (rt_strcmp(recv_data, "q") == 0 || rt_strcmp(recv_data, "Q") == 0)
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{
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/* If the first letter is 'q' or 'Q', close the connection */
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/* 如果是首字母是q或Q，关闭这个连接 */
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LOG_I("Got a 'q' or 'Q', close the socket.");
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goto __exit;
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}
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else
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{
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/* Show the message in terminal */
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/* 在控制终端显示收到的数据 */
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LOG_D("Received data = %s", recv_data);
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}
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}
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/* Send message to connected socket */
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/* 发送数据到sock连接 */
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ret = send(sock, send_data, rt_strlen(send_data), 0);
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if (ret < 0)
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{
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/* Send failed, close the connection */
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/* 发送失败，关闭这个连接 */
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LOG_I("send error, close the socket.");
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goto __exit;
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}
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else if (ret == 0)
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{
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/* Print warning message when send function return 0 */
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/* 打印send函数返回值为0的警告信息 */
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LOG_W("Send warning, send function return 0.");
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}
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@ -165,6 +178,9 @@ __exit:
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return;
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}
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/**
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* @brief The usage description of tcp client on rt-Thread
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*/
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static void usage(void)
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{
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rt_kprintf("Usage: tcpclient -h <host> -p <port>\n");
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@ -178,6 +194,9 @@ static void usage(void)
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rt_kprintf(" --help Print help information\n");
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}
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/**
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* @brief This function is for testing tcp client on rt-Thread
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*/
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static void tcpclient_test(int argc, char** argv)
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{
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rt_thread_t tid;
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@ -1,10 +1,11 @@
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/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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* Copyright (c) 2006-2022, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2022-01-24 ChungHsuan improve code comments
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*/
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#include <rtthread.h>
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@ -16,7 +17,7 @@
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#include <sys/time.h>
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#include <sys/select.h>
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#endif
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#include <sys/socket.h> /* 使用BSD socket，需要包含socket.h头文件 */
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#include <sys/socket.h> /* socket.h header file is needed when using BSD socket */ /* 使用BSD socket，需要包含socket.h头文件 */
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#include "netdb.h"
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#define DEBUG_TCP_SERVER
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@ -34,12 +35,15 @@
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static int started = 0;
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static int is_running = 0;
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static int port = 5000;
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static const char send_data[] = "This is TCP Server from RT-Thread."; /* 发送用到的数据 */
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static const char send_data[] = "This is TCP Server from RT-Thread."; /* The message be sent */ /* 发送用到的数据 */
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/**
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* @brief This function is for creating a tcp server on RT-Thread
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*/
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static void tcpserv(void *arg)
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{
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int ret;
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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 */
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char *recv_data; /* recv_data is a pointer used to receive 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 */
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int sock, connected, bytes_received;
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struct sockaddr_in server_addr, client_addr;
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@ -47,33 +51,33 @@ static void tcpserv(void *arg)
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fd_set readset, readset_c;
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socklen_t sin_size = sizeof(struct sockaddr_in);
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recv_data = rt_malloc(BUFSZ + 1); /* 分配接收用的数据缓冲 */
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recv_data = rt_malloc(BUFSZ + 1);/* Allocate space for recv_data */ /* 分配接收用的数据缓冲 */
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if (recv_data == RT_NULL)
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{
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LOG_E("No memory");
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return;
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}
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/* Before making use of socket, socket should be created first and set the socket created to SOCK_STREAM(TCP) */
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/* 一个socket在使用前，需要预先创建出来，指定SOCK_STREAM为TCP的socket */
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if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)
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{
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LOG_E("Create socket error");
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goto __exit;
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}
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/* Initialize server side address */
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/* 初始化服务端地址 */
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server_addr.sin_family = AF_INET;
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server_addr.sin_port = htons(port); /* 服务端工作的端口 */
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server_addr.sin_port = htons(port); /*Server side port number*//* 服务端工作的端口 */
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server_addr.sin_addr.s_addr = INADDR_ANY;
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rt_memset(&(server_addr.sin_zero), 0x0, sizeof(server_addr.sin_zero));
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/* Bind socket to server side address */
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/* 绑定socket到服务端地址 */
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if (bind(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1)
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{
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LOG_E("Unable to bind");
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goto __exit;
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}
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/* Listen on socket */
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/* 在socket上进行监听 */
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if (listen(sock, 10) == -1)
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{
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/* Wait for read or write */
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if (select(sock + 1, &readset, RT_NULL, RT_NULL, &timeout) == 0)
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continue;
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/* Accept a request from client and the function is blocking */
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/* 接受一个客户端连接socket的请求，这个函数调用是阻塞式的 */
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connected = accept(sock, (struct sockaddr *)&client_addr, &sin_size);
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/* Return the socket connected sucessfully */
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/* 返回的是连接成功的socket */
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if (connected < 0)
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{
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LOG_E("accept connection failed! errno = %d", errno);
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continue;
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}
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/* Accept the message which points by client address */
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/* 接受返回的client_addr指向了客户端的地址信息 */
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LOG_I("I got a connection from (%s , %d)\n",
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inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));
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/* Handle method of client connection */
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/* 客户端连接的处理 */
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while (is_running)
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{
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@ -122,7 +127,7 @@ static void tcpserv(void *arg)
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/* Wait for read or write */
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if (select(connected + 1, &readset_c, RT_NULL, RT_NULL, &timeout) == 0)
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continue;
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/* Receive message from connected socket. Buffer size is 1024 bytes,but it's not guranteed to receive size exactly 1024 */
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/* 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 */
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bytes_received = recv(connected, recv_data, BUFSZ, 0);
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if (bytes_received < 0)
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@ -134,16 +139,18 @@ static void tcpserv(void *arg)
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}
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else if (bytes_received == 0)
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{
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/* Print warning message when recv function return 0 */
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/* 打印recv函数返回值为0的警告信息 */
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LOG_W("Received warning, recv function return 0.");
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continue;
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}
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else
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{
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{ /* Receive data sucessfully and append '\0' at the end of message */
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/* 有接收到数据，把末端清零 */
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recv_data[bytes_received] = '\0';
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if (strcmp(recv_data, "q") == 0 || strcmp(recv_data, "Q") == 0)
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{
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/* If the first letter is 'q' or 'Q', close the connection */
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/* 如果是首字母是q或Q，关闭这个连接 */
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LOG_I("Got a 'q' or 'Q', close the connect.");
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closesocket(connected);
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@ -152,6 +159,7 @@ static void tcpserv(void *arg)
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}
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else if (strcmp(recv_data, "exit") == 0)
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{
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/* If the message received is 'exit', close the whole server side. */
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/* 如果接收的是exit，则关闭整个服务端 */
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closesocket(connected);
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connected = -1;
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@ -159,11 +167,12 @@ static void tcpserv(void *arg)
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}
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else
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{
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/* Show the message in terminal */
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/* 在控制终端显示收到的数据 */
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LOG_D("Received data = %s", recv_data);
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}
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}
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/* Send message to connected socket */
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/* 发送数据到connected socket */
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ret = send(connected, send_data, rt_strlen(send_data), 0);
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if (ret < 0)
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@ -175,6 +184,7 @@ static void tcpserv(void *arg)
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}
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else if (ret == 0)
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{
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/* Print warning message when send function return 0 */
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/* 打印send函数返回值为0的警告信息 */
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LOG_W("Send warning, send function return 0.");
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}
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@ -202,6 +212,9 @@ __exit:
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return;
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}
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/**
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* @brief The usage description of tcp server on rt-Thread
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*/
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static void usage(void)
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{
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rt_kprintf("Usage: tcpserver -p <port>\n");
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@ -214,6 +227,9 @@ static void usage(void)
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rt_kprintf(" --help Print help information\n");
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}
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/**
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* @brief This function is for testing tcp server on rt-Thread
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*/
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static void tcpserver_test(int argc, char** argv)
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{
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rt_thread_t tid;
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|
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@ -1,15 +1,16 @@
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/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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* Copyright (c) 2006-2022, RT-Thread Development Team
|
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*
|
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* SPDX-License-Identifier: Apache-2.0
|
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*
|
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* Change Logs:
|
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* Date Author Notes
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* 2022-01-24 ChungHsuan improve code comments
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*/
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#include <rtthread.h>
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#include <sys/socket.h> /* 使用BSD socket，需要包含sockets.h头文件 */
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#include <sys/socket.h> /* socket.h header file is needed when using BSD socket */ /* 使用BSD socket，需要包含sockets.h头文件 */
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#include "netdb.h"
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#define DEBUG_UDP_CLIENT
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@ -27,14 +28,17 @@ static int is_running = 0;
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static char url[256];
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static int port = 8080;
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static int count = 10;
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const char send_data[] = "This is UDP Client from RT-Thread.\n"; /* 发送用到的数据 */
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const char send_data[] = "This is UDP Client from RT-Thread.\n";/* The message be sent */ /* 发送用到的数据 */
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/**
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* @brief This function is for creating a udp client on RT-Thread
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*/
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static void udpclient(void *arg)
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{
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int sock;
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struct hostent *host;
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struct sockaddr_in server_addr;
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/* Get host address by parameter URL (domain name resolution if input domain) */
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/* 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） */
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host = (struct hostent *) gethostbyname(url);
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if (host == RT_NULL)
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@ -42,14 +46,15 @@ static void udpclient(void *arg)
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LOG_E("Get host by name failed!");
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return;
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}
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/* Create a socket and set it to SOCK_DGRAM(UDP) */
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/* 创建一个socket，类型是SOCK_DGRAM，UDP类型 */
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if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)
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{
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/* Failed on creatinf socket */
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LOG_E("Create socket error");
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return;
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}
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/* Initialize server side address */
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/* 初始化预连接的服务端地址 */
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server_addr.sin_family = AF_INET;
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server_addr.sin_port = htons(port);
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@ -58,17 +63,18 @@ static void udpclient(void *arg)
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started = 1;
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is_running = 1;
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/* The total sending number(count) */
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/* 总计发送count次数据 */
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while (count && is_running)
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{
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/* Send message to server side */
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/* 发送数据到服务远端 */
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sendto(sock, send_data, rt_strlen(send_data), 0,
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(struct sockaddr *)&server_addr, sizeof(struct sockaddr));
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/* Thread sllep for 1 second */
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/* 线程休眠一段时间 */
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rt_thread_mdelay(1000);
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/* count decrease 1 */
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/* 计数值减一 */
|
||||
count --;
|
||||
}
|
||||
|
|
@ -77,7 +83,7 @@ static void udpclient(void *arg)
|
|||
{
|
||||
LOG_I("UDP client send data finished!");
|
||||
}
|
||||
|
||||
/* Close the socket */
|
||||
/* 关闭这个socket */
|
||||
if (sock >= 0)
|
||||
{
|
||||
|
|
@ -88,6 +94,9 @@ static void udpclient(void *arg)
|
|||
is_running = 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief The usage description of udp client on rt-Thread
|
||||
*/
|
||||
static void usage(void)
|
||||
{
|
||||
rt_kprintf("Usage: udpclient -h <host> -p <port> [--cnt] [count]\n");
|
||||
|
|
@ -102,6 +111,9 @@ static void usage(void)
|
|||
rt_kprintf(" --help Print help information\n");
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief This function is for testing udp client on rt-Thread
|
||||
*/
|
||||
static void udpclient_test(int argc, char** argv)
|
||||
{
|
||||
rt_thread_t tid;
|
||||
|
|
|
|||
|
|
@ -1,10 +1,11 @@
|
|||
/*
|
||||
* Copyright (c) 2006-2021, RT-Thread Development Team
|
||||
* Copyright (c) 2006-2022, RT-Thread Development Team
|
||||
*
|
||||
* SPDX-License-Identifier: Apache-2.0
|
||||
*
|
||||
* Change Logs:
|
||||
* Date Author Notes
|
||||
* 2022-01-24 ChungHsuan improve code comments
|
||||
*/
|
||||
|
||||
#include <rtthread.h>
|
||||
|
|
@ -16,7 +17,7 @@
|
|||
#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 <sys/socket.h> /* socket.h header file is needed when using BSD socket */ /* 使用BSD socket，需要包含socket.h头文件 */
|
||||
#include "netdb.h"
|
||||
|
||||
#define DEBUG_UDP_SERVER
|
||||
|
|
@ -35,6 +36,9 @@ static int started = 0;
|
|||
static int is_running = 0;
|
||||
static int port = 5000;
|
||||
|
||||
/**
|
||||
* @brief This function is for creating a udp server on RT-Thread
|
||||
*/
|
||||
static void udpserv(void *paramemter)
|
||||
{
|
||||
int sock;
|
||||
|
|
@ -45,7 +49,7 @@ static void udpserv(void *paramemter)
|
|||
|
||||
struct timeval timeout;
|
||||
fd_set readset;
|
||||
|
||||
/* Allocate space for recv_data */
|
||||
/* 分配接收用的数据缓冲 */
|
||||
recv_data = rt_malloc(BUFSZ);
|
||||
if (recv_data == RT_NULL)
|
||||
|
|
@ -53,20 +57,20 @@ static void udpserv(void *paramemter)
|
|||
LOG_E("No memory");
|
||||
return;
|
||||
}
|
||||
|
||||
/* Create a socket and set it to SOCK_DGRAM(UDP) */
|
||||
/* 创建一个socket，类型是SOCK_DGRAM，UDP类型 */
|
||||
if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
|
||||
{
|
||||
LOG_E("Create socket error");
|
||||
goto __exit;
|
||||
}
|
||||
|
||||
/* Initialize server side address */
|
||||
/* 初始化服务端地址 */
|
||||
server_addr.sin_family = AF_INET;
|
||||
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));
|
||||
|
||||
/* Bind socket to server side address */
|
||||
/* 绑定socket到服务端地址 */
|
||||
if (bind(sock, (struct sockaddr *)&server_addr,
|
||||
sizeof(struct sockaddr)) == -1)
|
||||
|
|
@ -92,7 +96,7 @@ static void udpserv(void *paramemter)
|
|||
/* Wait for read or write */
|
||||
if (select(sock + 1, &readset, RT_NULL, RT_NULL, &timeout) == 0)
|
||||
continue;
|
||||
|
||||
/* The maximum size received from sock is BUFSZ-1 bytes*/
|
||||
/* 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);
|
||||
|
|
@ -108,11 +112,11 @@ static void udpserv(void *paramemter)
|
|||
}
|
||||
else
|
||||
{
|
||||
recv_data[bytes_read] = '\0'; /* 把末端清零 */
|
||||
|
||||
recv_data[bytes_read] = '\0'; /* Append '\0' at the end of message *//* 把末端清零 */
|
||||
/* Output received message */
|
||||
/* 输出接收的数据 */
|
||||
LOG_D("Received data = %s", recv_data);
|
||||
|
||||
/* If the message received is 'exit', quit. */
|
||||
/* 如果接收数据是exit，退出 */
|
||||
if (strcmp(recv_data, "exit") == 0)
|
||||
{
|
||||
|
|
@ -136,6 +140,9 @@ __exit:
|
|||
is_running = 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief The usage description of udp server on rt-Thread
|
||||
*/
|
||||
static void usage(void)
|
||||
{
|
||||
rt_kprintf("Usage: udpserver -p <port>\n");
|
||||
|
|
@ -148,6 +155,9 @@ static void usage(void)
|
|||
rt_kprintf(" --help Print help information\n");
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief This function is for testing udp server on rt-Thread
|
||||
*/
|
||||
static void udpserver_test(int argc, char** argv)
|
||||
{
|
||||
rt_thread_t tid;
|
||||
|
|
|
|||
Loading…
Reference in New Issue