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add TCP client send test. 

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@571 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong 2010-04-01 12:58:29 +00:00
parent 8f431e61bb
commit 6c83bee27f
1 changed files with 63 additions and 0 deletions
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63
examples/network/tcpsendpacket.c Normal file
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#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 */
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;
}
/* 神奇内存 */
buffer_ptr = rt_malloc(length);
/* 构造发生数据 */
for (index = 0; index < length; index ++)
buffer_ptr[index] = index & 0xff;
timeout = 100;
/* 设置发送超时时间100ms */
lwip_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 == -1) //数据发送错误处理
{
rt_kprintf("TCP thread send error: %d\n", result);
lwip_close(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);
}
}
}
#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