Hi, I have a multithreaded socket client that i use to send and receive messages to/from a server.I would like my client to connect to the server if it can,if it can't it must try to connect every 500 ms(and loop until it connects). Once it is connected,it must make two threads of which each one calls a subroutine.All this is fine, My problem is that,if for some reason,the server disconnects,my client loops giving error messages.I want my client to detect that the server has disconnected,and retry to connect every 500ms. How can i detect that the socket went down,to pass my script back to step 1 where it tries to connect. Thanks for any help/suggestions. Here's my code 
#!/usr/local/bin/perl
use threads;
use IO::Socket::INET;
$error=1;
my $MySocket;
while (1) {

        if ($error eq 1) {

                if ($MySocket=new IO::Socket::INET->new(PeerPort=>1234
+,Proto=>'tcp',PeerAddr=>'192.168.100.9')) {
                        $error=0;
                        print "Connected $error \n";
                }
                else {
                        print "Could not connect try again 5ms \n";
                        select(undef, undef, undef, 0.5);
                        $error=1;
                }
        }
        else {

                print "Hallo daar Error=$error\n";

                $thread1 = threads->new(\&sendQMsg);
                $thread2 = threads->new(\&sendQMsg2);

                grep {$_->join;} ($thread1,$thread2);
                while ( my(@list)=threads->list()) {
                        print "$#list\n";
                        grep { $_->join } @list;
                }
        }

}
sub sendQMsg {

        $message = "Hi from thread 1";
        if ($MySocket->send($message)) {
                $error=0;
        }
        else {
                $error=1;
        }
}
sub sendQMsg2 {

        $message = "Hi from thread 2\n";
        if ($MySocket->send($message)) {
                $error=0;
        }
        else {
                $error=1;
        }
}

[download]
Before my MySocket->send i would like to see that the socket server went down,and this must pass control back to the place where i try to connect.Any suggestions? Thanks

In reply to Check if Socket is alive before send by baddah

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