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server.py
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# -*- coding: utf-8 -*-
from twisted.internet import reactor, protocol
import struct
UDP_SERVER_RESPONSE = "\x80"
UDP_CLIENT_REQUEST = "\x00"
UDP_DEBUGR_RESPONSE = "game_mode=3;inet=1;maxpl=4;nation=de;numpl=1;password=0;players=\xA7(10)\x1BnoBlubb\x1C\xA7(-1)\x1B;run=1;server_addr=127.0.0.1;server_name=Blubberium (noBlubb);server_port=58282;vmaj=1;vmin=1;vtype=f"
UDP_DEBUGR_REQUEST = "game=EM4;lang=de;mod={0:s}"
CFG_MASTER_SERVER_IP = '84.201.2.89'
"""
len type val
2 bytes "session-id" random?
1 byte "mode" hex(00)=>request(client->server), hex(80)=>response(server->client)
1 byte "content-len" hex encoded content length
"""
def HELPER_buildNameString(playerList):
if len(playerList) == 1:
return "\xA7(10)\x1B{0:s}\x1C\xA7(-1)\x1B".format(playerList[0])
elif len(playerList) == 2:
return "\xA7(10)\x1B{0:s}\x1C\xA7(-1)\x1B, {1:s}".format(playerList[0],playerList[1])
elif len(playerList) > 2:
return "\xA7(10)\x1B{0:s}\x1C\xA7(-1)\x1B, ".format(playerList[0]) + ', '.join(playerList[1:4])
def HELPER_fetchNameString(playerString):
players = []
for player in playerString.split(', '):
players.append(player.replace("\xA7(10)\x1B","").replace("\x1C\xA7(-1)\x1B","").strip())
return players
def HELPER_dictionaryToDataString(dataIn):
conversion = ''
for x,y in dataIn:
conversion += ';' + x + '=' + y
return conversion
def HELPER_dataStringToDictionary(dataIn):
conversion = {}
for x in dataIn.split(';'):
y,z = x.split('=')
if len(y) > 0:
conversion[y] = z
return conversion
class MultiplayerSession():
def __init__(self, data):
for x,y in data.iteritems():
setattr(self, x, y)
def getAsGameString(self):
temp_dict = {}
for x in dir(self).remove('__doc__').remove('__module__'):
temp_dict[x] = getattr(self, x)
temp_dict['players'] = HELPER_buildNameString(temp_dict['players'])
return HELPER_dictionaryToDataString(temp_dict)
class CommunityServer():
def __init__(self):
self.sessions = {}
#byte 3 should be mode \x00, ignore? byte 4 should be content-len, ignore?
def checkMasterServerUpdate(self):
return True
def performMasterServerUpdate(self, modname=''):
request = UDP_DEBUGR_REQUEST.format(modname)
requestlen = struct.pack('B', len(request))
self.transport.write("\x13\x37\x00"+requestlen+request, (CFG_MASTER_SERVER_IP, 54321))
def receiveMasterServerUpdate(self, request):
pass #process data here
def startSession(self, data, modname=''):
newGame = MultiplayerSession(data)
if not modname in self.sessions:
self.sessions[modname] = {}
self.sessions[modname][data['server_addr']] = newGame
return newGame
def endSession(self, session):
self.sessions[session.mod].pop(session.server_addr, None)
return True
def processUDP(self, data):
session = data[:2]
mode = data[3]
length = int(data[4].encode('hex'), 16)
request = HELPER_dataStringToDictionary(data[4:])
print 'UDP', request
#if mode == UDP_SERVER_RESPONSE:
# return #u what mate
#else: #master response should not trigger update call
# if self.checkMasterServerUpdate():
# self.performMasterServerUpdate()
#response = UDP_DEBUGR_RESPONSE
if not 'mod' in request:
request['mod'] = ''
for x,y in self.sessions[request['mod']].iteritems():
response = y.getAsGameString()
responselen = struct.pack('B', len(response))
yield session + UDP_SERVER_RESPONSE + responselen + response
def processTCP(self, data):
packet = int(data[:4].encode('hex'), 16)
#unknown = data[4:8]
length = int(data[8:12][::-1].encode('hex'), 16) #little edian (wtf!)
request = data[12:12+length]
print 'TCP', request
return packet, length, request
class TCPComProtocol(protocol.Protocol):
def __init__(self):
self.session = None
def doStart(self):
pass
def dataReceived(self, data):
packet, length, request_raw = self.factory.master.processTCP(data)
request = HELPER_dataStringToDictionary(request_raw)
if 'players' in request:
request['players'] = HELPER_fetchNameString(request['players'])
request['server_addr'] = self.transport.getPeer().host
print request
if self.session is None:
self.session = self.factory.master.startSession(request)
else: #update?
for x,y in request.iteritems():
setattr(self.session, x, y)
self.factory.master.sessions[self.session.mod][self.session.server_addr] = self.session
if not self.kickCall is None:
self.kickCall.cancel()
self.kickCall = None
def connectionMade(self):
self.kickCall = reactor.callLater(5, self.autoKick)
def autoKick(self):
if not self.session is None:
if self.factory.master.endSession(self.session):
self.session = None
self.transport.loseConnection()
def connectionLost(self, reason):
if not self.session is None:
self.factory.master.endSession(self.session)
class UDPComProtocol(protocol.DatagramProtocol):
def __init__(self, master):
self.server = master
def doStart(self):
pass
def datagramReceived(self, data, address):
#if address[0] is CFG_MASTER_SERVER_IP:
# self.receiveMasterServerUpdate(data)
# return
for response in self.server.processUDP(data):
self.transport.write(response, address)
def main():
masterserver = CommunityServer()
factory = protocol.ServerFactory()
factory.protocol = TCPComProtocol
factory.master = masterserver
reactor.listenTCP(54321, factory)
reactor.listenUDP(54321, UDPComProtocol(masterserver))
reactor.run()
if __name__ == '__main__':
main()