[lwip-users] socket: LWIP_ACCEPT problem?

[Piero 74]

Hi all.

I'm testing socket on lwip 130rc1

this is a piece of my code:

  // Create a new tcp connection handle 
  //----------------------------------------------------------
  sockfd = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
  serv_addr.sin_family = AF_INET;
  serv_addr.sin_addr.s_addr = INADDR_ANY;
  serv_addr.sin_port = htons(20000);
  bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr));
  //    setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, (char*)&bOptVal, bOptLen);
  listen(sockfd, 0);
  //----------------------------------------------------------

  // Loop forever 
  while(1)
  {
    // Wait for connection. 
    //------------------------------------------------------    
    newsockfd = accept(sockfd, &addr, &addrlen);
    bOptVal = TRUE;
    //------------------------------------------------------    
    for (i=0; i<10; i++)
    {
      // send 10 hello world!
      lwip_write(newsockfd, provatx, 12);
    }        
    
    // close connection
    close(newsockfd);
  }

I have a simple client on pc running windows.

If the client fixs his local port, accept function accept connection only the first time, after seems it doesn't accept.

If my client changes its local port for EVERY attempt, accept works weel!!! 

What is the problem???

bye,
Piero