Closesocket报错

发布于 2023-06-12 18:53:35 浏览：489 订阅该版

自己做了一个板子有三个网卡，ENC28J60、ESP8266、EC20，在使用TCP例程里，closesocket报错
```c
static  void  tcpclient_entry(void*  parameter)
{
		struct  hostent  *host;
	struct  sockaddr_in  server_addr;
	const  char  *url="dtu1.build110.com";
	int  port = 44015;

/*  获取需要监听的描述符号最大值  */
////	const  char  *url="10.32.41.11";
////  int  port = 8080;
	host  =  gethostbyname(url);/*  分配用于存放接收数据的缓冲  */
  STEP1:
	/*  创建一个socket，类型是SOCKET_STREAM，TCP类型  */
	if ((sock  =  socket(AF_INET,  SOCK_STREAM,  0))  ==  -1)
	{
	/*  创建socket失败  */
    sockstatus= 0;
		rt_kprintf("Socket  error\n");
	/*  释放接收缓冲  */
		return ;
	}
	else
	{
		rt_kprintf("Socket  ok\n");
	}
	/*  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  */
	
	if (connect(sock,  (struct  sockaddr  *)&server_addr,  sizeof(struct  sockaddr))  ==  -1)
	{
		
		sockstatus= 0;
	/*  连接失败  */
		rt_kprintf("Connect  fail!\r\n");
//		lwip_close(sock);
//		 closesocket(sock);
		rt_thread_mdelay(1000);	
		goto STEP1;

//		return;
		
	}
	else
	{
		sockstatus =1;
		rt_kprintf("Connect  ok\r\\n");
		goto STEP2;
	/*释放接收缓冲  */
//		return  RT_ERROR;
	}
	STEP2:
	int  ret;
	fd_set  readset;
	int  i, maxfdp1;
	maxfdp1  =  sock  +  1;
//	ret  =  send(sock,  send_data,  13,  0);
	recv_data  =  rt_malloc(BUFSZ);
	if (recv_data  ==  RT_NULL)
	{
		rt_kprintf("No  memory\n");
		return ;
	}
	while(1)
	{
		/*  清空可读事件描述符列表  */
		FD_ZERO(&readset);
		/*  将需要监听可读事件的描述符加入列表  */ 
		FD_SET(sock,  &readset);
		/*  等待设定的网络描述符有事件发生  */
		i =  select(maxfdp1,  &readset,  RT_NULL,  RT_NULL,  RT_NULL);
		/*  至少有一个文件描述符有指定事件发生再向后运行  */
		
		if (i !=  0)
		{
			rt_kprintf("select have to be here %d\r\n",i);
			/*  查看  sock  描述符上有没有发生可读事件  */
			if (FD_ISSET(sock,  &readset))
			{
			// rt_kprintf("\nhave  get  a sock  event\r\n");
			/*  从sock连接中接收最大BUFSZ  - 1字节数据  */
				bytes_received  =  recv(sock,  recv_data,  BUFSZ  - 1,  0);
				if (bytes_received  <  0)
				{
					goto STEP1;
					sockstatus = 0;
					/*  接收失败，关闭这个连接  */
					closesocket(sock);
					//	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)
				{
					goto STEP1;
					sockstatus= 0;
					/*  默认  recv  为阻塞模式，此时收到0认为连接出错，关闭这个连接  */
					closesocket(sock);
					rt_kprintf("\nreceived  error,close  the  socket.\r\n");
					/*  释放接收缓冲  */
					rt_free(recv_data);
					//	break;
				}
				else
				{
					sockstatus = 1;
					/*  有接收到数据，把末端清零  */
//					recv_data[bytes_received]  =  '\0';
//					for(rt_uint8_t j=0;j<bytes_received;j++)
//					{
//							rt_kprintf("0x%X,",recv_data[j]);
//					}
					/*  在控制终端显示收到的数据  */
					frame_parcode(recv_data,bytes_received);
//					rt_free(recv_data);
				}
			}
		}
		rt_thread_mdelay(10);	
	}
}
```

![screenshot_964b0f183adf31ef2654a95a5a5afae.png](https://oss-club.rt-thread.org/uploads/20230612/b58e1f36ddd0a72088f6039af2a09e6b.png)