#!/usr/bin/perl -w # udpmsg - send a message to the udpquotd server use IO::Socket; use strict; my($sock, $server_host, $msg, $port, $ipaddr, $hishost, $MAXLEN, $PORTNO, $TIMEOUT); $MAXLEN = 1024; $PORTNO = 5151; $TIMEOUT = 5; $server_host = shift; $msg = "@ARGV"; $sock = IO::Socket::INET->new(Proto => 'udp', PeerPort => $PORTNO, PeerAddr => $server_host) or die "Creating socket: $!\n"; $sock->send($msg) or die "send: $!"; eval { local $SIG{ALRM} = sub { die "alarm time out" }; alarm $TIMEOUT; $sock->recv($msg, $MAXLEN) or die "recv: $!"; alarm 0; 1; # return value from eval on normalcy } or die "recv from $server_host timed out after $TIMEOUT seconds.\n"; ($port, $ipaddr) = sockaddr_in($sock->peername); $hishost = gethostbyaddr($ipaddr, AF_INET); print "Server $hishost responded ``$msg''\n";