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Message-ID: <4a03a72c050914161345feff39@mail.gmail.com>
Date: Thu, 15 Sep 2005 01:13:04 +0200
From: znort <stef DOT pellegrino AT gmail DOT com>
Reply-To: znort AT delorie DOT com
To: cygwin AT cygwin DOT com
Subject: help on socket connexion
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Hello everybody,

Could U help me please it's very important of course :(


I'm doing (trying exactly) a little client/serveur tcp programm.


the skeleton is classic (from server side)

main()
{
  fd_set readfds, rmask;
  struct timeval tv;
  int sd;
  
  ...
  sd = create_socket();
  
  ...
    
  while(1)
  {
    FD_ZERO(&rmask);
    FD_SET(sd, &rmask);
    readfds = rmask; 
    tv.tv_sec=5;
    tv.tv_usec=0;


    if ( select(FD_SETSIZE, &readfds, NULL, NULL, &tv) ) 
    {
      if (errno!=EINTR)
      {
        /* socket gets something ! */
        if (FD_ISSET(sd ,&readfds))
        {
          // goto child
          fork();
          ...
        }
      }
    }    





Everything works except the famous FD_SETSIZE (yes I use select()) limit to 64


Now If I run a sample client test with a loop which try to connect 64
times to my server,
it works... but with FD_SETSIZE limit, my server will hang after 64 fork.

Right, but now, always on client side :

If I try a loop with 32 connection, it's ok.
then I stop all my clients connexion - the children on server side die (ok)

If I try to connect again 32 times with my client by running my test
program again...
I meet again the FD_SETSIZE limit !!!

I suppose I've forgotten something on server side but where ???




please help me

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