90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/*
|
||
* Copyright (c) 2006-2021, RT-Thread Development Team
|
||
*
|
||
* SPDX-License-Identifier: Apache-2.0
|
||
*
|
||
* Change Logs:
|
||
* Date Author Notes
|
||
*/
|
||
|
||
#include <rtthread.h>
|
||
|
||
#include <netdb.h> /* 为了解析主机名，需要包含netdb.h头文件 */
|
||
#include <sys/socket.h> /* 使用BSD socket，需要包含socket.h头文件 */
|
||
|
||
void tcp_senddata(const char *url, int port, int length)
|
||
{
|
||
struct hostent *host;
|
||
int sock, err, result, timeout, index;
|
||
struct sockaddr_in server_addr;
|
||
rt_uint8_t *buffer_ptr;
|
||
|
||
/* 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);
|
||
/* 创建一个socket，类型是SOCKET_STREAM，TCP类型 */
|
||
if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)
|
||
{
|
||
/* 创建socket失败 */
|
||
rt_kprintf("Socket error\n");
|
||
return;
|
||
}
|
||
|
||
/* 申请内存 */
|
||
buffer_ptr = rt_malloc(length);
|
||
if(RT_NULL == buffer_ptr)
|
||
{
|
||
/* 申请内存失败 */
|
||
rt_kprintf("No memory\n");
|
||
return;
|
||
}
|
||
|
||
/* 构造发送数据 */
|
||
for (index = 0; index < length; index ++)
|
||
buffer_ptr[index] = index & 0xff;
|
||
|
||
timeout = 100;
|
||
/* 设置发送超时时间100ms */
|
||
setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(timeout));
|
||
/* 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));
|
||
|
||
/* 连接到服务端 */
|
||
err = connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr));
|
||
rt_kprintf("TCP thread connect error code: %d\n", err);
|
||
|
||
while (1)
|
||
{
|
||
/* 发送数据到sock连接 */
|
||
result = send(sock, buffer_ptr, length, MSG_DONTWAIT);
|
||
if (result < 0) //数据发送错误处理
|
||
{
|
||
rt_kprintf("TCP thread send error: %d\n", result);
|
||
closesocket(sock);
|
||
|
||
/* 关闭连接，重新创建连接 */
|
||
rt_thread_delay(10);
|
||
|
||
if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)
|
||
rt_kprintf("TCP Socket error:%d\n", sock);
|
||
|
||
err = connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr));
|
||
rt_kprintf("TCP thread connect error code: %d\n", err);
|
||
}
|
||
else if (result == 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");
|
||
}
|
||
}
|
||
}
|
||
|
||
#ifdef RT_USING_FINSH
|
||
#include <finsh.h>
|
||
/* 输出tcpclient函数到finsh shell中 */
|
||
FINSH_FUNCTION_EXPORT(tcp_senddata, send a packet through tcp connection);
|
||
#endif
|
||
|