announcecache.pl

-

#!/usr/local/bin/perl

$|=1;

$host = (shift || 'sd.cache.nlanr.net');
$port = (shift || '3131');

require "$ENV{'HARVEST_HOME'}/lib/socket.ph";

$sockaddr = 'S n a4 x8';
($name, $aliases, $proto) = getprotobyname("udp");
($fqdn, $aliases, $type, $len, $themaddr) = gethostbyname($host);
$thissock = pack($sockaddr, &AF_INET, 0, "\0\0\0\0");
$them = pack($sockaddr, &AF_INET, $port, $themaddr);

chop($me=`uname -a|cut -f2 -d' '`);
$myip=(gethostbyname($me))[4];

die "socket: $!\n" unless
	socket (SOCK, &AF_INET, &SOCK_DGRAM, $proto);

while (<>) {
	chop;
	$request_template = 'CCnx4x8x4a4a' . length;
	$request = pack($request_template, 1, 1, 24 + length, $myip, $_);
	die "send: $!\n" unless
		send(SOCK, $request, 0, $them);
	die "recv: $!\n" unless
		recv(SOCK, $reply, 1024, 0);
	($type,$ver,$len,$payload) = unpack('CCnx4x8x4A', $reply);
	print $CODES[$type] . " $_\n";
}