Once you begin to deal with I/O and timers, it's time to use a dedicated that will make your code more reliable, and easier to read and maintain.

I strongly suggest AnyEvent.

Try this (incompletely tested) code:

use strict;
use warnings;
use AnyEvent;
use AnyEvent::Handle::UDP;

my $cv = AE::cv;

my $comm_port = $ARGV[0] or die "missing port number";

my $server = AnyEvent::Handle::UDP->new(
    bind => [ localhost => $comm_port ],
    on_recv => sub {
        my ($datagram, $handle, $addr) = @_;
        if ($datagram =~ /^done/i) {
            $cv->send;
        } else {
            print $datagram;
        }
    },
    rtimeout => 10, on_rtimeout => sub { warn "Timeout!\n"; $cv->send 
+}
);

print "Waiting for Response On Port $comm_port\n";
$cv->recv;

[download]

In reply to Re: Not able to timeout by dolmen
in thread Not able to timeout by anshumangoyal

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