I am writing a network client application which simply receives some signals from the server and returns responses.

The problem is when a forked child process is trying to write to the socket on the second call, IO::Socket::SSL simply closes the connection. Though, the first time it's called ( tick() ), it doesn't break the connection and returns a healthy response.

The problem exists:
1) only on Linux, it works fine on Windows.
2) only with IO::Socket::SSL, it works fine with IO::Socket::INET

minimized code to reproduce the problem:
use strict;
use warnings;
use IO::Socket::SSL qw(debug4);

my $_pid;
my $connection = IO::Socket::SSL->new(
        PeerHost => 'local.btc-node',
        PeerPort => 7566,
        Proto=> 'tcp',
        Timeout => 8,
        SSL_verify_mode => 0x00
    ) or die($!);

    while(<$connection>)
    {
        if(/action1/)
         {
            # do something, no problem
         }
        elsif(/tick\s+([^\d\s\t]+)/)
         {
            my $currency = $1;
            tick ($connection, $currency);
         }
    }

    
    
sub tick {
my $socket = shift;
my $currency = shift;


    if ($_pid = fork)
    {
        waitpid($_pid, 0);
    } 
    else 
    {
      if (fork)
       {
            exit;
       } 
       else 
       {
            my $response =`tick $currency 2>&1 3>&1`;
            $socket->print($response . "\n"); # without this line $con
+nection doesn't break on the second call
            exit;
       }
  }
}

[download]
I suppose there is a socket reference being missed, or something similar. What am I doing wrong?

In reply to IO::Socket::SSL + fork problem by mrhyde

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