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Update tcpsendpacket.c

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This commit is contained in:
David Lin
2020-04-17 18:39:04 +08:00
committed by GitHub
parent 33f7124b36
commit 8e57dcb723
1 changed files with 22 additions and 15 deletions
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37
examples/network/tcpsendpacket.c
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@@ -1,7 +1,7 @@
#include <rtthread.h>
#include <netdb.h> /* Ϊ<EFBFBD>˽<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>netdb.hͷ<EFBFBD>ļ<EFBFBD> */
#include <sys/socket.h> /* ʹ<EFBFBD><EFBFBD>BSD socket<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>socket.hͷ<EFBFBD>ļ<EFBFBD> */
#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)
{
@@ -10,45 +10,52 @@ void tcp_senddata(const char *url, int port, int length)
struct sockaddr_in server_addr;
rt_uint8_t *buffer_ptr;
/* ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD>url<EFBFBD><EFBFBD><EFBFBD><EFBFBD>host<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
/* 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);
/* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>socket<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>SOCKET_STREAM<EFBFBD><EFBFBD>TCP<EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
/* 创建一个socket，类型是SOCKET_STREAM，TCP类型 */
if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)
{
/* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>socketʧ<EFBFBD><EFBFBD> */
/* 创建socket失败 */
rt_kprintf("Socket error\n");
return;
}
/* <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD> */
/* 申请内存 */
buffer_ptr = rt_malloc(length);
/* <20><><EFBFBD>췢<EFBFBD><ECB7A2><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
if(RT_NULL == buffer_ptr)
{
/* 申请内存失败 */
rt_kprintf("Not enough memory\n");
return;
}
/* 构造发送数据 */
for (index = 0; index < length; index ++)
buffer_ptr[index] = index & 0xff;
timeout = 100;
/* <EFBFBD><EFBFBD><EFBFBD>÷<EFBFBD><EFBFBD>ͳ<EFBFBD>ʱʱ<EFBFBD><EFBFBD>100ms */
/* 设置发送超时时间100ms */
setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(timeout));
/* <EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>Ԥ<EFBFBD><EFBFBD><EFBFBD>ӵķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD>ַ */
/* 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));
/* <EFBFBD><EFBFBD><EFBFBD>ӵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
/* 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)
{
/* <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD>sock<EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
/* 发送数据到sock连接 */
result = send(sock, buffer_ptr, length, MSG_DONTWAIT);
if (result < 0) //<EFBFBD><EFBFBD><EFBFBD>ݷ<EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
if (result < 0) //数据发送错误处理
{
rt_kprintf("TCP thread send error: %d\n", result);
closesocket(sock);
/* <EFBFBD>ر<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>´<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
/* 关闭连接，重新创建连接 */
rt_thread_delay(10);
if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)
@@ -59,7 +66,7 @@ void tcp_senddata(const char *url, int port, int length)
}
else if (result == 0)
{
/* <EFBFBD><EFBFBD>ӡsend<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵΪ0<EFBFBD>ľ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ */
/* 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");
}
}
@@ -67,7 +74,7 @@ void tcp_senddata(const char *url, int port, int length)
#ifdef RT_USING_FINSH
#include <finsh.h>
/* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>tcpclient<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>finsh shell<EFBFBD><EFBFBD> */
/* 输出tcpclient函数到finsh shell中 */
FINSH_FUNCTION_EXPORT(tcp_senddata, send a packet through tcp connection);
#endif