3200 tcp socket disconnect as tcpclient

Hi,

    Follow is my code:

void usr_TcpClient(void *pvParameters)
{
 SlSockAddrIn_t  sAddr;
 int             iAddrSize;
 int             iStatus;
 unsigned int dest_ip;
 unsigned short usr_port;

 start:

 usr_port=init_flash_temp[init_flash_netp_sta+65];  //
 usr_port<<=8;
 usr_port += init_flash_temp[init_flash_netp_sta+66];

 //filling the TCP server socket address
 sAddr.sin_family = SL_AF_INET;
 sAddr.sin_port = sl_Htons((unsigned short)usr_port);
 sAddr.sin_addr.s_addr = sl_Htonl(dest_ip);

 iAddrSize = sizeof(SlSockAddrIn_t);

 // creating a TCP socket
 tcpclient_iSockID = sl_Socket(SL_AF_INET,SL_SOCK_STREAM, 0);
 if( tcpclient_iSockID < 0 )
 {
  usr_Report("creat tcp client err\r\n");
  sl_Close(tcpclient_iSockID);
  goto start;
 }

 unsigned long  enableOption = 1;
 sl_SetSockOpt(tcpclient_iSockID,SL_SOL_SOCKET,SL_SO_KEEPALIVE, &enableOption,sizeof(enableOption));

 struct SlTimeval_t timeVal;
 if(init_flash_temp[init_flash_pwr_sta+3]==0x00)// set recive time out
 {
  timeVal.tv_sec =  3;             // Seconds
  timeVal.tv_usec = 0;             // Microseconds. 10000 microseconds resolution
  iStatus = sl_SetSockOpt(tcpclient_iSockID,SL_SOL_SOCKET,SL_SO_RCVTIMEO, (_u8 *)&timeVal, sizeof(timeVal));    // Enable receive timeout
 }

 usr_Report("creat tcp client ok\r\n");
 while(1)
 {

  // connecting to TCP server

 
  vTaskDelay(1000);

  iStatus = sl_Connect(tcpclient_iSockID, ( SlSockAddr_t *)&sAddr, iAddrSize);
  if( iStatus < 0 )
  {
   usr_Report("tcp client connect server ing\r\n");
   continue;
  }
  else
  {
   usr_Report("tcp client connect server success\r\n");

   tcp_connect_sta=0x0a;//connected

   while(1)
   {

    iStatus = sl_Recv(tcpclient_iSockID, recv_buf, TR_BUFF_SIZE, 0);//SL_POOL_IS_EMPTY

    if( iStatus <= 0 )
    {
     if(iStatus==0)
     {
      sl_Close(tcpclient_iSockID);
      usr_Report("tcp client disconnect the server\r\n");

      tcp_connect_sta=0x00;//dis

      goto start;
     }
     else
     {
      continue;
     }
    }
    else
    {
     usr_Report("tcp client recive num:#%d#\r\n",iStatus);
    
       //UART_PRINT("%d",iStatus);
       //
       uart_send_Ndata(UARTA0_BASE,recv_buf,iStatus);
   }
  }
 }
}

The issue is that if i set the socket as recive timeout (red code) ,i will recive 0 (sl_Recv return ),when i shut down the tcp server.

If i don't set the socket as recive timeout ,i can't recive 0 (sl_Recv return ),when i shut down the tcp server.And it is still blocked in sl_Recv .

I explain shuting down the tcpserver: I closed software directly,so the disconnect does not finish the four handsharks,and it is only two hansharks;Like the above picture.

So if there is keepalive packets,it will check the disconnect.But i can't recive keepalive packets after more than 300 seconds.

Is there other way to check the abnormal disconnect.

Hi,

Sorry for the delayed response.

We are looking into recreating this issue.
We will try to update as soon as possible,

Thanks,
Alon

Hi,

    Can you give me a e-mail,i send you a server soft ware.And you test use my software.