Thanks Javafan. Using IO::Select is a good idea. 

#!/usr/bin/perl -w
#
# udp client which sends a query, waits for timeout
# seconds and prints response if obtained else cribs.
#
use strict;
use IO::Socket;
use IO::Select;
my $srvhost = '10.1.1.111';
my $srvport = '3333';
my $client = new IO::Socket::INET(
                      PeerAddr => $srvhost,
                       PeerPort => $srvport,
                       Proto    => 'udp');
my $sel = new IO::Select($client);
my @ready;
my $sock;
my $request = "e8aa9e somequery 123";
my $maxread = 1024;
while (1) {
    if (! defined($client->send($request))) {
    die "failed to send req\n";
    }
    print "sent $request\n\n";
    @ready = $sel->can_read(5);
    if (! scalar(@ready)) {
    print "Response Timed out\n";
    } else {
    $sock = $ready[0];    
    if (! sysread($ready[0], $response, $maxread)) {
        print "recv failed :$!\n";    
    } else {
        print "got response $response\n";    
    }
    }
    sleep 3;
}

[download]

I don't need to do recv as I can read through sysread, and this being a server response I don't need to send back any replies - so I don't need recv for its capabilities of getting the remote host's information. I don't even need to be in blocking mode now - or do I?. Am I right in saying this?

In reply to Re^2: how to set socket recv timeout in architecture independent manner? by saurabh.hirani
in thread how to set socket recv timeout in architecture independent manner? by saurabh.hirani

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