gistfile1.txt

import socket   #for sockets
import sys  #for exit
import binascii
import time
import threading

def rcon_hash(msg):
	hashdec = (binascii.crc32(msg) & 0xFFFFFFFF)
	hashdec = "%08X" % hashdec
	hx = '0x';
	ha = hx + hashdec[0:2];
	hb = hx + hashdec[2:4];
	hc = hx + hashdec[4:6];
	hd = hx + hashdec[6:8];
	return chr(int(hd, 16)) + chr(int(hc, 16)) + chr(int(hb, 16)) + chr(int(ha, 16));

def rcon_login(host, port, password):
	head = chr(0x42) + chr(0x45);
	passmsg = chr(0xFF) + chr(0x00) + password;
	loginmsg = chr(0x42) + chr(0x45) + rcon_hash(passmsg) + passmsg;

	s.sendto(loginmsg, (host, port))

	d = s.recvfrom(1024)

	reply = d[0]
	addr = d[1]

	return True if (str(ord(reply[-1:])) == "1") else False;


host = '127.0.0.1';
port = 2302;
password = 'password';


try:
	s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
	s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
	s.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
	s.bind(('', port))
except socket.error:
	print 'Failed to create socket'
	sys.exit() 

if rcon_login(host, port, password) == False:
	print 'Login failed';
	sys.exit();

print 'Login success';

#print ' '.join(str(hex(ord(c))) for c in loginmsg)

def keepalive(s, host, port):
	i = 0
	while (1):
		msg = chr(0xFF) + chr(0x01) + chr(i)
		msg = chr(0x42) + chr(0x45) + rcon_hash(msg) + msg;
		s.sendto(msg, (host, port))
		time.sleep(10)

t = threading.Thread(target=keepalive, args = (s, host, port))
t.daemon = True
t.start()

def parse_chat(chatResponse):
	checksum = chatResponse[2:6]
	cmd = str(ord(chatResponse[7:8]))
	seq = chatResponse[8:9]
	chat = chatResponse[9:]
	if cmd == "2":
		msg = chr(0xFF) + chr(0x02) + seq;
		msg = chr(0x42) + chr(0x45) + rcon_hash(msg) + msg;
		s.sendto(msg, (host, port))
		print chat.strip()

while(1) :
	d = s.recv(1024)
	reply = d[0]
	addr = d[1]
	parse_chat(d)