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Merge pull request #3543 from DavidLin1577/patch-5 

[examples/network]Update tcpsendpacket.c
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Bernard Xiong 2020-04-19 17:56:49 +08:00 committed by GitHub
parent d2ff505538 993835b5ed
commit 60a04a83d7
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GPG Key ID: 4AEE18F83AFDEB23
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 <rtthread.h>
#include <netdb.h> /* 为了解析主机名，需要包含netdb.h头文件 */ #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 */ #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) 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; struct sockaddr_in server_addr;
rt_uint8_t *buffer_ptr; 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） */ /* 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); host = gethostbyname(url);
/* 创建一个socket，类型是SOCKET_STREAM，TCP类型 */ /* 创建一个socket，类型是SOCKET_STREAM，TCP类型 */
if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)
{ {
/* 创建socket失败 */ /* 创建socket失败 */
rt_kprintf("Socket error\n"); rt_kprintf("Socket error\n");
return; return;
} }
/* 申请内存 */ /* 申请内存 */
buffer_ptr = rt_malloc(length); buffer_ptr = rt_malloc(length);
/* 构造发送数据 */ 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 ++) for (index = 0; index < length; index ++)
buffer_ptr[index] = index & 0xff; buffer_ptr[index] = index & 0xff;
timeout = 100; timeout = 100;
/* 设置发送超时时间100ms */ /* 设置发送超时时间100ms */
setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(timeout)); setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(timeout));
/* 初始化预连接的服务端地址 */ /* 初始化预连接的服务端地址 */
server_addr.sin_family = AF_INET; server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(port); server_addr.sin_port = htons(port);
server_addr.sin_addr = *((struct in_addr *)host->h_addr); server_addr.sin_addr = *((struct in_addr *)host->h_addr);
rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero)); rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero));
/* 连接到服务端 */ /* 连接到服务端 */
err = connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)); err = connect(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr));
rt_kprintf("TCP thread connect error code: %d\n", err); rt_kprintf("TCP thread connect error code: %d\n", err);
while (1) while (1)
{ {
/* 发送数据到sock连接 */ /* 发送数据到sock连接 */
result = send(sock, buffer_ptr, length, MSG_DONTWAIT); result = send(sock, buffer_ptr, length, MSG_DONTWAIT);
if (result < 0) //数据发送错误处理 if (result < 0) //数据发送错误处理
{ {
rt_kprintf("TCP thread send error: %d\n", result); rt_kprintf("TCP thread send error: %d\n", result);
closesocket(sock); closesocket(sock);
/* 关闭连接，重新创建连接 */ /* 关闭连接，重新创建连接 */
rt_thread_delay(10); rt_thread_delay(10);
if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) 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) else if (result == 0)
{ {
/* 打印send函数返回值为0的警告信息 */ /* 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"); 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 #ifdef RT_USING_FINSH
#include <finsh.h> #include <finsh.h>
/* 输出tcpclient函数到finsh shell中 */ /* 输出tcpclient函数到finsh shell中 */
FINSH_FUNCTION_EXPORT(tcp_senddata, send a packet through tcp connection); FINSH_FUNCTION_EXPORT(tcp_senddata, send a packet through tcp connection);
#endif #endif