Can anyone see anything obvious here? When I use TCP I get the desired output, when using UDP - I get a status of UP whether the port is up or down. 
#!/usr/bin/perl -w

use strict;
use IO::Socket::INET;
use Getopt::Long;

my @hosts   = "";
my $timeout = "2";
my $port    = "";
my $opts    = GetOptions("host=s" => \@hosts,
                         "port=s" => \$port,
                         "timeout=s" => \$timeout);

@hosts = split /,/, join(',',@hosts);

die "usage: sp -h <host|IP> -p <port>\n" unless $hosts[1];

for my $host(@hosts)
{
    next if $host eq '';
    my $status  = ( connection($host, $port) == 0 ) ? "Up" : "Down";

    printf " %-20s %-5s %-1s\n", $host, $port, $status;
}

##############
sub connection
##############
{
    my $host = shift;
    my $tcp_port = shift;

    my $sock = IO::Socket::INET ->new(
                 Timeout  => $timeout,
                 PeerAddr => $host,
                 PeerPort => $tcp_port,
                 Proto    => 'udp' );

    die "Unable to return $sock\n"
        unless return $sock ? 0 : 1;
}

[download]
Thanks in advance?
Ted
--
"That which we persist in doing becomes easier, not that the task itself has become easier, but that our ability to perform it has improved."
  --Ralph Waldo Emerson

In reply to UDP and IO::Socket::INET by tcf03

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