use Socket;
$servaddr = 'some.org';
$servport = 29015;

$proto = getprotobyname 'udp';
$naddr = inet_aton $servaddr;
$paddr = sockaddr_in $servport, $naddr;

$text = 'blah, my udp message';

socket MY_SOCK, AF_INET, SOCK_DGRAM, $proto;
send (MY_SOCK, $text, 0, $paddr) == length $text;
recv MY_SOCK, $recved_data, 1024, 0;
close MY_SOCK;