add more Chinese comments.
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@536 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong
parent
7606f6d952
commit
cd039a8b49
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@ -1,30 +1,24 @@
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/*
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* File : readwrite.c
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* This file is part of RT-TestCase in RT-Thread RTOS
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* COPYRIGHT (C) 2010, RT-Thread Development Team
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* 代码清单：文件读写例子
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2010-02-10 Bernard first version
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* 这个例子演示了如何读写一个文件，特别是写的时候应该如何操作。
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*/
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#include <rtthread.h>
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#include <dfs_posix.h>
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#include <dfs_posix.h> /* 当需要使用文件操作时，需要包含这个头文件 */
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#define TEST_FN "/test.dat"
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/* 测试用的数据和缓冲 */
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static char test_data[120], buffer[120];
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/* 文件读写测试 */
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/* 文件读写测试 */
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void readwrite(const char* filename)
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{
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int fd;
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int index, length;
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/* 只写 & 创建 打开 */
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/* 只写 & 创建 打开 */
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fd = open(TEST_FN, O_WRONLY | O_CREAT | O_TRUNC, 0);
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if (fd < 0)
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{
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@ -32,13 +26,13 @@ void readwrite(const char* filename)
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return;
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}
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/* 准备写入数据 */
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/* 准备写入数据 */
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for (index = 0; index < sizeof(test_data); index ++)
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{
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test_data[index] = index + 27;
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}
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/* 写入数据 */
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/* 写入数据 */
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length = write(fd, test_data, sizeof(test_data));
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if (length != sizeof(test_data))
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{
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@ -47,10 +41,10 @@ void readwrite(const char* filename)
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return;
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}
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/* 关闭文件 */
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/* 关闭文件 */
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close(fd);
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/* 只写并在末尾添加打开 */
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/* 只写并在末尾添加打开 */
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fd = open(TEST_FN, O_WRONLY | O_CREAT | O_APPEND, 0);
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if (fd < 0)
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{
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@ -65,10 +59,10 @@ void readwrite(const char* filename)
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close(fd);
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return;
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}
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/* 关闭文件 */
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/* 关闭文件 */
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close(fd);
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/* 只读打开进行数据校验 */
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/* 只读打开进行数据校验 */
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fd = open(TEST_FN, O_RDONLY, 0);
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if (fd < 0)
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{
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@ -76,6 +70,7 @@ void readwrite(const char* filename)
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return;
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}
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/* 读取数据(应该为第一次写入的数据) */
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length = read(fd, buffer, sizeof(buffer));
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if (length != sizeof(buffer))
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{
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@ -83,6 +78,8 @@ void readwrite(const char* filename)
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close(fd);
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return;
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}
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/* 检查数据是否正确 */
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for (index = 0; index < sizeof(test_data); index ++)
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{
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if (test_data[index] != buffer[index])
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@ -93,6 +90,7 @@ void readwrite(const char* filename)
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}
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}
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/* 读取数据(应该为第二次写入的数据) */
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length = read(fd, buffer, sizeof(buffer));
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if (length != sizeof(buffer))
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{
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@ -100,6 +98,8 @@ void readwrite(const char* filename)
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close(fd);
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return;
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}
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/* 检查数据是否正确 */
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for (index = 0; index < sizeof(test_data); index ++)
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{
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if (test_data[index] != buffer[index])
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@ -109,13 +109,15 @@ void readwrite(const char* filename)
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return;
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}
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}
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/* 检查数据完毕，关闭文件 */
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/* 检查数据完毕，关闭文件 */
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close(fd);
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/* 打印结果 */
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/* 打印结果 */
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rt_kprintf("read/write done.\n");
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}
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#ifdef RT_USING_FINSH
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#include <finsh.h>
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/* 输出函数到finsh shell命令行中 */
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FINSH_FUNCTION_EXPORT(readwrite, perform file read and write test);
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#endif
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@ -14,9 +14,11 @@ static rt_thread_t tid1 = RT_NULL;
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static rt_thread_t tid2 = RT_NULL;
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static rt_thread_t tid3 = RT_NULL;
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struct rt_event event;
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/* 事件控制块 */
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static struct rt_event event;
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void thread1_entry(void *param)
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/* 线程1入口函数 */
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static void thread1_entry(void *param)
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{
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rt_uint32_t e;
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@ -31,7 +33,7 @@ void thread1_entry(void *param)
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}
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rt_kprintf("thread1: delay 1s to prepare second event\n");
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rt_thread_delay(100);
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rt_thread_delay(10);
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/* receive second event */
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if (rt_event_recv(&event, ((1 << 3) | (1 << 5)),
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@ -41,34 +43,37 @@ void thread1_entry(void *param)
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rt_kprintf("thread1: OR recv event 0x%x\n", e);
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}
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rt_thread_delay(50);
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rt_thread_delay(5);
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}
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}
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void thread2_entry(void *param)
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/* 线程2入口函数 */
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static void thread2_entry(void *param)
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{
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while (1)
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{
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rt_kprintf("thread2: send event1\n");
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rt_event_send(&event, (1 << 3));
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rt_thread_delay(100);
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rt_thread_delay(10);
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}
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}
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void thread3_entry(void *param)
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/* 线程3入口函数 */
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static void thread3_entry(void *param)
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{
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while (1)
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{
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rt_kprintf("thread3: send event2\n");
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rt_event_send(&event, (1 << 5));
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rt_thread_delay(200);
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rt_thread_delay(20);
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}
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}
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int event_simple_init()
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{
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/* 初始化事件对象 */
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rt_event_init(&event, "event", RT_IPC_FLAG_FIFO);
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/* 创建线程1 */
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@ -115,6 +120,9 @@ static void _tc_cleanup()
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if (tid3 != RT_NULL && tid3->stat != RT_THREAD_CLOSE)
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rt_thread_delete(tid3);
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/* 执行事件对象脱离 */
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rt_event_detach(&event);
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/* 调度器解锁 */
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rt_exit_critical();
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@ -1,81 +1,95 @@
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#include <rtthread.h>
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#include <lwip/netdb.h>
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#include <lwip/sockets.h>
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#include <lwip/netdb.h> /* 为了解析主机名，需要包含netdb.h头文件 */
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#include <lwip/sockets.h> /* 使用BSD socket，需要包含sockets.h头文件 */
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static const char send_data[] = "This is TCP Client from RT-Thread.";
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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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void tcpclient(const char* url, int port)
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{
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char *recv_data;
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struct hostent *host;
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int sock, bytes_received;
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struct sockaddr_in server_addr;
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char *recv_data;
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struct hostent *host;
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int sock, bytes_received;
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struct sockaddr_in server_addr;
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host = gethostbyname(url);
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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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recv_data = rt_malloc(1024);
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if (recv_data == RT_NULL)
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{
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rt_kprintf("No memory\n");
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return;
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}
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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(1024);
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if (recv_data == RT_NULL)
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{
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rt_kprintf("No memory\n");
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return;
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}
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if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)
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{
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rt_kprintf("Socket error\n");
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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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/* 创建socket失败 */
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rt_kprintf("Socket error\n");
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/* release recv buffer */
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rt_free(recv_data);
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return;
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}
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/* 释放接收缓冲 */
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rt_free(recv_data);
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return;
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}
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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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/* 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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if (connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1)
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{
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rt_kprintf("Connect error\n");
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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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/* 连接失败 */
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rt_kprintf("Connect error\n");
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/* release recv buffer */
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rt_free(recv_data);
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return;
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}
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/*释放接收缓冲 */
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rt_free(recv_data);
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return;
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}
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while(1)
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{
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bytes_received = recv(sock, recv_data, 1024, 0);
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if (bytes_received < 0)
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{
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lwip_close(sock);
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while(1)
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{
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/* 从sock连接中接收最大1024字节数据 */
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bytes_received = recv(sock, recv_data, 1024, 0);
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if (bytes_received < 0)
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{
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/* 接收失败，关闭这个连接 */
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lwip_close(sock);
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/* release recv buffer */
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rt_free(recv_data);
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break;
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}
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/* 释放接收缓冲 */
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rt_free(recv_data);
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break;
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}
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recv_data[bytes_received] = '\0';
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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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lwip_close(sock);
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if (strcmp(recv_data , "q") == 0 || strcmp(recv_data , "Q") == 0)
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{
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/* 如果是首字母是q或Q，关闭这个连接 */
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lwip_close(sock);
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/* release recv buffer */
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rt_free(recv_data);
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break;
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}
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else
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{
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rt_kprintf("\nRecieved data = %s " , recv_data);
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}
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/* 释放接收缓冲 */
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rt_free(recv_data);
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break;
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}
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else
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{
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/* 在控制终端显示收到的数据 */
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rt_kprintf("\nRecieved data = %s " , recv_data);
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}
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send(sock,send_data,strlen(send_data), 0);
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}
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/* 发送数据到sock连接 */
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send(sock,send_data,strlen(send_data), 0);
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}
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return;
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return;
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}
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#ifdef RT_USING_FINSH
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#include <finsh.h>
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/* 输出tcpclient函数到finsh shell中 */
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FINSH_FUNCTION_EXPORT(tcpclient, startup tcp client);
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#endif
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@ -1,109 +1,122 @@
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#include <rtthread.h>
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#include <lwip/sockets.h>
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#include <lwip/sockets.h> /* 使用BSD Socket接口必须包含sockets.h这个头文件 */
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static const char send_data[] = "This is TCP Server from RT-Thread.";
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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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void tcpserv(void* parameter)
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{
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char *recv_data;
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rt_uint32_t sin_size;
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int sock, connected, bytes_received;
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struct sockaddr_in server_addr, client_addr;
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rt_bool_t stop = RT_FALSE;
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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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rt_uint32_t sin_size;
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int sock, connected, bytes_received;
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struct sockaddr_in server_addr, client_addr;
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rt_bool_t stop = RT_FALSE; /* 停止标志 */
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recv_data = rt_malloc(1024);
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if (recv_data == RT_NULL)
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{
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rt_kprintf("No memory\n");
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return;
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}
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recv_data = rt_malloc(1024); /* 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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rt_kprintf("No memory\n");
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return;
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}
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/* create a socket */
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if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)
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{
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rt_kprintf("Socket error\n");
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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, 0)) == -1)
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{
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/* 创建失败的错误处理 */
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rt_kprintf("Socket error\n");
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/* release recv buffer */
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rt_free(recv_data);
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return;
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}
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/* 释放已分配的接收缓冲 */
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rt_free(recv_data);
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return;
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}
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/* init server address */
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server_addr.sin_family = AF_INET;
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server_addr.sin_port = htons(5000);
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server_addr.sin_addr.s_addr = INADDR_ANY;
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rt_memset(&(server_addr.sin_zero),8, sizeof(server_addr.sin_zero));
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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(5000); /* 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),8, sizeof(server_addr.sin_zero));
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/* bind socket */
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if (bind(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1)
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{
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rt_kprintf("Unable to bind\n");
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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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/* 绑定失败 */
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rt_kprintf("Unable to bind\n");
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/* release recv buffer */
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rt_free(recv_data);
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return;
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}
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/* 释放已分配的接收缓冲 */
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rt_free(recv_data);
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return;
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}
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/* listen socket */
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if (listen(sock, 5) == -1)
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{
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rt_kprintf("Listen error\n");
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/* 在socket上进行监听 */
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if (listen(sock, 5) == -1)
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{
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rt_kprintf("Listen error\n");
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/* release recv buffer */
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rt_free(recv_data);
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return;
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}
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/* release recv buffer */
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rt_free(recv_data);
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return;
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}
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rt_kprintf("\nTCPServer Waiting for client on port 5000...\n");
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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);
|
||||
|
||||
/* accept a client socket */
|
||||
connected = accept(sock, (struct sockaddr *)&client_addr, &sin_size);
|
||||
/* 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 */
|
||||
|
||||
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));
|
||||
|
||||
while (1)
|
||||
{
|
||||
send(connected, send_data, strlen(send_data), 0);
|
||||
/* 客户端连接的处理 */
|
||||
while (1)
|
||||
{
|
||||
/* 发送数据到connected socket */
|
||||
send(connected, send_data, strlen(send_data), 0);
|
||||
|
||||
bytes_received = recv(connected,recv_data, 1024, 0);
|
||||
if (bytes_received < 0)
|
||||
{
|
||||
/* close socket */
|
||||
lwip_close(connected);
|
||||
break;
|
||||
}
|
||||
/* 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 */
|
||||
lwip_close(connected);
|
||||
break;
|
||||
}
|
||||
|
||||
recv_data[bytes_received] = '\0';
|
||||
if (strcmp(recv_data , "q") == 0 || strcmp(recv_data , "Q") == 0)
|
||||
{
|
||||
lwip_close(connected);
|
||||
break;
|
||||
}
|
||||
else if (strcmp(recv_data, "exit") == 0)
|
||||
{
|
||||
lwip_close(connected);
|
||||
stop = RT_TRUE;
|
||||
break;
|
||||
}
|
||||
else
|
||||
{
|
||||
rt_kprintf("RECIEVED 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 */
|
||||
lwip_close(connected);
|
||||
break;
|
||||
}
|
||||
else if (strcmp(recv_data, "exit") == 0)
|
||||
{
|
||||
/* 如果接收的是exit，则关闭整个服务端 */
|
||||
lwip_close(connected);
|
||||
stop = RT_TRUE;
|
||||
break;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* 在控制终端显示收到的数据 */
|
||||
rt_kprintf("RECIEVED DATA = %s \n" , recv_data);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
lwip_close(sock);
|
||||
/* 退出服务 */
|
||||
lwip_close(sock);
|
||||
|
||||
/* release recv buffer */
|
||||
rt_free(recv_data);
|
||||
/* 释放接收缓冲 */
|
||||
rt_free(recv_data);
|
||||
|
||||
return ;
|
||||
return ;
|
||||
}
|
||||
|
||||
#ifdef RT_USING_FINSH
|
||||
#include <finsh.h>
|
||||
/* 输出tcpserv函数到finsh shell中 */
|
||||
FINSH_FUNCTION_EXPORT(tcpserv, startup tcp server);
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -1,42 +1,50 @@
|
|||
#include <rtthread.h>
|
||||
#include <lwip/netdb.h>
|
||||
#include <lwip/sockets.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 */
|
||||
|
||||
const char send_data[] = "This is UDP Client from RT-Thread.\n";
|
||||
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)
|
||||
{
|
||||
int sock;
|
||||
struct hostent *host;
|
||||
struct sockaddr_in server_addr;
|
||||
int sock;
|
||||
struct hostent *host;
|
||||
struct sockaddr_in server_addr;
|
||||
|
||||
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);
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
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));
|
||||
|
||||
while (count)
|
||||
{
|
||||
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));
|
||||
|
||||
rt_thread_delay(50);
|
||||
/* 线程休眠一段时间 */
|
||||
rt_thread_delay(50);
|
||||
|
||||
count --;
|
||||
}
|
||||
/* 计数值减一 */
|
||||
count --;
|
||||
}
|
||||
|
||||
/* close socket */
|
||||
lwip_close(sock);
|
||||
/* 关闭这个socket */
|
||||
lwip_close(sock);
|
||||
}
|
||||
|
||||
#ifdef RT_USING_FINSH
|
||||
#include <finsh.h>
|
||||
/* 输出udpclient函数到finsh shell中 */
|
||||
FINSH_FUNCTION_EXPORT(udpclient, startup udp client);
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -1,74 +1,84 @@
|
|||
#include <rtthread.h>
|
||||
#include <lwip/sockets.h>
|
||||
#include <lwip/sockets.h> /* 使用BSD socket，需要包含sockets.h头文件 */
|
||||
|
||||
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;
|
||||
rt_uint32_t addr_len;
|
||||
struct sockaddr_in server_addr, client_addr;
|
||||
|
||||
recv_data = rt_malloc(1024);
|
||||
if (recv_data == RT_NULL)
|
||||
{
|
||||
rt_kprintf("No memory\n");
|
||||
return;
|
||||
}
|
||||
/* 分配接收用的数据缓冲 */
|
||||
recv_data = rt_malloc(1024);
|
||||
if (recv_data == RT_NULL)
|
||||
{
|
||||
/* 分配内存失败，返回 */
|
||||
rt_kprintf("No memory\n");
|
||||
return;
|
||||
}
|
||||
|
||||
/* create socket */
|
||||
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");
|
||||
|
||||
/* release recv buffer */
|
||||
rt_free(recv_data);
|
||||
return;
|
||||
}
|
||||
/* 释放接收用的数据缓冲 */
|
||||
rt_free(recv_data);
|
||||
return;
|
||||
}
|
||||
|
||||
/* init server socket address */
|
||||
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));
|
||||
|
||||
if (bind(sock,(struct sockaddr *)&server_addr,
|
||||
sizeof(struct sockaddr)) == -1)
|
||||
{
|
||||
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");
|
||||
|
||||
/* release recv buffer */
|
||||
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);
|
||||
addr_len = sizeof(struct sockaddr);
|
||||
rt_kprintf("UDPServer Waiting for client on port 5000...\n");
|
||||
|
||||
rt_kprintf("UDPServer Waiting for client on port 5000...\n");
|
||||
while (1)
|
||||
{
|
||||
/* 从sock中收取最大1024字节数据 */
|
||||
bytes_read = recvfrom(sock, recv_data, 1024, 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)
|
||||
{
|
||||
bytes_read = recvfrom(sock, recv_data, 1024, 0,
|
||||
(struct sockaddr *)&client_addr, &addr_len);
|
||||
recv_data[bytes_read] = '\0';
|
||||
rt_kprintf("\n(%s , %d) said : ",inet_ntoa(client_addr.sin_addr),
|
||||
ntohs(client_addr.sin_port));
|
||||
rt_kprintf("%s", recv_data);
|
||||
recv_data[bytes_read] = '\0'; /* 把末端清零 */
|
||||
|
||||
if (strcmp(recv_data, "exit") == 0)
|
||||
{
|
||||
lwip_close(sock);
|
||||
/* 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);
|
||||
|
||||
/* release recv buffer */
|
||||
rt_free(recv_data);
|
||||
break;
|
||||
}
|
||||
}
|
||||
/* 如果接收数据是exit，退出 */
|
||||
if (strcmp(recv_data, "exit") == 0)
|
||||
{
|
||||
lwip_close(sock);
|
||||
|
||||
return;
|
||||
/* 释放接收用的数据缓冲 */
|
||||
rt_free(recv_data);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
#ifdef RT_USING_FINSH
|
||||
#include <finsh.h>
|
||||
/* 输出udpserv函数到finsh shell中 */
|
||||
FINSH_FUNCTION_EXPORT(udpserv, startup udp server);
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue