send q3 clients silly lists! HAR HAR

q3master.py

#!/usr/bin/python
from socket import *
import struct

# SEE: http://www.gnu-darwin.org/www001/src/ports/games/masterserver/work/masterserver-0.4.1/docs/PROTOCOLS

# Request: \xFF\xFF\xFF\xFFgetservers Quake3Arena 68 full empty
# Reply: \xFF\xFF\xFF\xFFgetserversResponse\\x0A\x0B\x0C\x0D\xY\xZ\[repeat]\EOT
# Reply: Max 112 servers per reply. Enforced? \EOT denotes the end of reply packets (only sent in last packet)

# Example: You have 200 servers. You send 112 server entries in the first packet (NO '\EOT')
# You send 88 entries in the second packet and slap an '\EOT' on the end
# Both packets have the prefix.

# To make this 'useful':
# When receiving 'heartbeat's from servers query them with 'getstatus' and include their info in the server list.
# The master server is supposed to filter entries based on criteria like 'full' and 'empty': RTFM
# Two heartbeats in quick succession denotes termination of a server. Enforced?

servers = ["127.0.0.1:1337", "192.168.0.1:31337", "69.69.69.69:9696", "99.138.32.95:27960", "207.192.70.235:27960"]

def host2entry(host):
	entry = bytearray()

	hostport = host.split(":")
	
	octets = [int(oct) for oct in hostport[0].split(".")]
	
	# Pack IP address
	entry.extend(struct.pack("BBBB", octets[0], octets[1], octets[2], octets[3]))
	# Pack port
	entry.extend(struct.pack("!h", int(hostport[1])))
	
	return entry
	
def sendServerList(sock, tohost):
	replyprefix = "\xFF\xFF\xFF\xFFgetserversResponse\\"
	entrydelimiter = '\\'
	
	entries = bytearray()
	for server in servers:
		entries.extend(host2entry(server) + entrydelimiter)
	
	sock.sendto(replyprefix + entries + "\EOT", tohost)
	
#
# main()
#
server_sock = socket(AF_INET, SOCK_DGRAM)
server_sock.bind(('', 27950))

while True:
	rx, srcaddr = server_sock.recvfrom(4096)
	
	if len(rx) < 4: # too short
		continue
		
	rxparts = rx[4:].split()
	if len(rxparts) < 3: # too few parts
		continue
		
	if rxparts[0] == 'getservers':
		print "Got request for servers:"
		print "\tGame: %s" % rxparts[1]
		print "\tProtocol: %s" % rxparts[2]
		sendServerList(server_sock, srcaddr)
	elif rxparts[0] == 'ROTFLHAHAHA':
		print "What kind of crackheaded Q3 client are you using?"
		continue