Imagelibrary/rt-thread
1
0
Fork 0
mirror of https://github.com/RT-Thread/rt-thread.git synced 2025-12-26 17:18:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

[examples] code cleanup.

Browse Source
This commit is contained in:
Bernard Xiong
2017-08-10 14:09:57 +08:00
parent f6b6a5cf22
commit 5f4bcfa3e1
3 changed files with 99 additions and 83 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
examples/network/tcpclient.c
View File

@@ -1,16 +1,17 @@
#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/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 */
#define BUFSZ 1024
#define BUFSZ 1024
static const char send_data[] = "This is TCP Client from RT-Thread."; /* 发送用到的数据 */
void tcpclient(const char* url, int port)
{
int ret;
char *recv_data;
struct hostent *host;
int sock, bytes_received;
int ret;
struct sockaddr_in server_addr;
/* 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） */
@@ -61,15 +62,18 @@ void tcpclient(const char* url, int port)
{
/* 接收失败，关闭这个连接 */
lwip_close(sock);
rt_kprintf("\nreceived error,close the socket.\r\n");
rt_kprintf("\nreceived error,close the socket.\r\n");
/* 释放接收缓冲 */
rt_free(recv_data);
break;
}else if (bytes_received == 0)
{
/* 打印recv函数返回值为0的警告信息 */
rt_kprintf("\nReceived warning,recv function return 0.\r\n");
}
}
else if (bytes_received == 0)
{
/* 打印recv函数返回值为0的警告信息 */
rt_kprintf("\nReceived warning,recv function return 0.\r\n");
continue;
}
/* 有接收到数据，把末端清零 */
recv_data[bytes_received] = '\0';
@@ -78,7 +82,8 @@ void tcpclient(const char* url, int port)
{
/* 如果是首字母是q或Q，关闭这个连接 */
lwip_close(sock);
rt_kprintf("\n got a 'q' or 'Q',close the socket.\r\n");
rt_kprintf("\n got a 'q' or 'Q',close the socket.\r\n");
/* 释放接收缓冲 */
rt_free(recv_data);
break;
@@ -91,17 +96,20 @@ void tcpclient(const char* url, int port)
/* 发送数据到sock连接 */
ret = send(sock,send_data,strlen(send_data), 0);
if (ret < 0)
if (ret < 0)
{
/* 接收失败，关闭这个连接 */
lwip_close(sock);
rt_kprintf("\nsend error,close the socket.\r\n");
rt_kprintf("\nsend error,close the socket.\r\n");
rt_free(recv_data);
break;
}else if (ret == 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");
}
}
else if (ret == 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");
}
}
return;