Leahnaya/dwc_network_server_emulator
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dwc_network_server_emulator/gamespy_natneg_server.py
polaris 174c643d35 More matchmaking bugfix attempts
2014-08-05 08:32:55 -04:00

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# DWC Network Server Emulator
# Copyright (C) 2014 polaris-
# Copyright (C) 2014 ToadKing
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# Server emulator for *.available.gs.nintendowifi.net and *.master.gs.nintendowifi.net
# Query and Reporting: http://docs.poweredbygamespy.com/wiki/Query_and_Reporting_Overview
import logging
import socket
import struct
import threading
import time
import Queue
import gamespy.gs_utility as gs_utils
import other.utils as utils
import traceback
from multiprocessing.managers import BaseManager
# Logger settings
logger_output_to_console = True
logger_output_to_file = True
logger_name = "GameSpyNatNegServer"
logger_filename = "gamespy_natneg_server.log"
logger = utils.create_logger(logger_name, logger_filename, -1, logger_output_to_console, logger_output_to_file)
class GameSpyServerDatabase(BaseManager):
pass
GameSpyServerDatabase.register("get_server_list")
GameSpyServerDatabase.register("modify_server_list")
GameSpyServerDatabase.register("find_servers")
GameSpyServerDatabase.register("find_server_by_address")
GameSpyServerDatabase.register("find_server_by_local_address")
GameSpyServerDatabase.register("add_natneg_server")
GameSpyServerDatabase.register("get_natneg_server")
GameSpyServerDatabase.register("delete_natneg_server")
class GameSpyNatNegServer(object):
def __init__(self):
self.session_list = {}
self.natneg_preinit_session = {}
self.secret_key_list = gs_utils.generate_secret_keys("gslist.cfg")
self.server_manager = GameSpyServerDatabase(address=("127.0.0.1", 27500), authkey="")
self.server_manager.connect()
def start(self):
try:
# Start natneg server
address = ('0.0.0.0', 27901) # accessible to outside connections (use this if you don't know what you're doing)
self.socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
self.socket.bind(address)
self.write_queue = Queue.Queue()
logger.log(logging.INFO, "Server is now listening on %s:%s..." % (address[0], address[1]))
threading.Thread(target=self.write_queue_worker).start()
while True:
recv_data, addr = self.socket.recvfrom(2048)
self.handle_packet(recv_data, addr)
except:
logger.log(logging.ERROR, "Unknown exception: %s" % traceback.format_exc())
def write_queue_send(self, data, address):
time.sleep(0.05)
self.socket.sendto(data, address)
def write_queue_worker(self):
while True:
data, address = self.write_queue.get()
threading.Thread(target=self.write_queue_send, args=(data, address)).start()
self.write_queue.task_done()
def handle_packet(self, recv_data, addr):
logger.log(logging.DEBUG, "Connection from %s:%d..." % (addr[0], addr[1]))
logger.log(logging.DEBUG, utils.pretty_print_hex(recv_data))
# Make sure it's a legal packet
if recv_data[0:6] != bytearray([0xfd, 0xfc, 0x1e, 0x66, 0x6a, 0xb2]):
return
session_id = struct.unpack("<I", recv_data[8:12])[0]
session_id_raw = recv_data[8:12]
# Handle commands
if recv_data[7] == '\x00':
logger.log(logging.DEBUG, "Received initialization from %s:%s..." % (addr[0], addr[1]))
output = bytearray(recv_data[0:14])
output += bytearray([0xff, 0xff, 0x6d, 0x16, 0xb5, 0x7d, 0xea ]) # Checked with Tetris DS, Mario Kart DS, and Metroid Prime Hunters, and this seems to be the standard response to 0x00
output[7] = 0x01 # Initialization response
self.write_queue.put((output, addr))
# Try to connect to the server
gameid = utils.get_string(recv_data, 0x15)
client_id = "%02x" % ord(recv_data[13])
localip_raw = recv_data[15:19]
localip_int_le = utils.get_ip(recv_data, 15)
localip_int_be = utils.get_ip(recv_data, 15, True)
localip = '.'.join(["%d" % ord(x) for x in localip_raw])
localport_raw = recv_data[19:21]
localport = utils.get_short(localport_raw, 0, True)
localaddr = (localip, localport, localip_int_le, localip_int_be)
self.session_list.setdefault(session_id, {}).setdefault(client_id, {
'connected': False,
'addr': '',
'localaddr': None,
'serveraddr': None,
'gameid': None
})
self.session_list[session_id][client_id]['gameid'] = gameid
self.session_list[session_id][client_id]['addr'] = addr
self.session_list[session_id][client_id]['localaddr'] = localaddr
clients = len(self.session_list[session_id])
for client in self.session_list[session_id]:
if self.session_list[session_id][client]['connected'] == False: # and self.session_list[session_id][client]['localaddr'][1] != 0:
if client == client_id:
continue
#if self.session_list[session_id][client]['serveraddr'] == None:
serveraddr = self.get_server_info(gameid, session_id, client)
if serveraddr == None:
serveraddr = self.get_server_info_alt(gameid, session_id, client)
self.session_list[session_id][client]['serveraddr'] = serveraddr
logger.log(logging.DEBUG, "Found server from local ip/port: %s from %d" % (serveraddr, session_id))
publicport = self.session_list[session_id][client]['addr'][1]
if self.session_list[session_id][client]['localaddr'][1] != 0:
publicport = self.session_list[session_id][client]['localaddr'][1]
if self.session_list[session_id][client]['serveraddr'] != None:
publicport = int(self.session_list[session_id][client]['serveraddr']['publicport'])
# Send to requesting client
output = bytearray(recv_data[0:12])
output += bytearray([int(x) for x in self.session_list[session_id][client]['addr'][0].split('.')])
output += utils.get_bytes_from_short(publicport, True)
output += bytearray([0x42, 0x00]) # Unknown, always seems to be \x42\x00
output[7] = 0x05
#self.write_queue.put((output, (self.session_list[session_id][client_id]['addr'])))
self.write_queue.put((output, (self.session_list[session_id][client_id]['addr'][0], self.session_list[session_id][client_id]['addr'][1])))
logger.log(logging.DEBUG, "Sent connection request to %s:%d..." % (self.session_list[session_id][client_id]['addr'][0], self.session_list[session_id][client_id]['addr'][1]))
logger.log(logging.DEBUG, utils.pretty_print_hex(output))
# Send to other client
#if self.session_list[session_id][client_id]['serveraddr'] == None:
serveraddr = self.get_server_info(gameid, session_id, client_id)
if serveraddr == None:
serveraddr = self.get_server_info_alt(gameid, session_id, client_id)
self.session_list[session_id][client_id]['serveraddr'] = serveraddr
logger.log(logging.DEBUG, "Found server 2 from local ip/port: %s from %d" % (serveraddr, session_id))
publicport = self.session_list[session_id][client_id]['addr'][1]
if self.session_list[session_id][client_id]['localaddr'][1] != 0:
publicport = self.session_list[session_id][client_id]['localaddr'][1]
if self.session_list[session_id][client_id]['serveraddr'] != None:
publicport = int(self.session_list[session_id][client_id]['serveraddr']['publicport'])
output = bytearray(recv_data[0:12])
output += bytearray([int(x) for x in self.session_list[session_id][client_id]['addr'][0].split('.')])
output += utils.get_bytes_from_short(publicport, True)
output += bytearray([0x42, 0x00]) # Unknown, always seems to be \x42\x00
output[7] = 0x05
#self.write_queue.put((output, (self.session_list[session_id][client]['addr'])))
self.write_queue.put((output, (self.session_list[session_id][client]['addr'][0], self.session_list[session_id][client]['addr'][1])))
logger.log(logging.DEBUG, "Sent connection request to %s:%d..." % (self.session_list[session_id][client]['addr'][0], self.session_list[session_id][client]['addr'][1]))
logger.log(logging.DEBUG, utils.pretty_print_hex(output))
elif recv_data[7] == '\x06': # Was able to connect
client_id = "%02x" % ord(recv_data[13])
logger.log(logging.DEBUG, "Received connected command from %s:%s..." % (addr[0], addr[1]))
if session_id in self.session_list and client_id in self.session_list[session_id]:
self.session_list[session_id][client_id]['connected'] = True
elif recv_data[7] == '\x0a': # Address check. Note: UNTESTED!
client_id = "%02x" % ord(recv_data[13])
logger.log(logging.DEBUG, "Received address check command from %s:%s..." % (addr[0], addr[1]))
output = bytearray(recv_data[0:15])
output += bytearray([int(x) for x in addr[0].split('.')])
output += utils.get_bytes_from_short(addr[1], True)
output += bytearray(recv_data[len(output):])
output[7] = 0x0b
self.write_queue.put((output, addr))
logger.log(logging.DEBUG, "Sent address check response to %s:%d..." % (addr[0], addr[1]))
logger.log(logging.DEBUG, utils.pretty_print_hex(output))
elif recv_data[7] == '\x0c': # Natify
port_type = "%02x" % ord(recv_data[12])
logger.log(logging.DEBUG, "Received natify command from %s:%s..." % (addr[0], addr[1]))
output = bytearray(recv_data)
output[7] = 0x02 # ERT Test
self.write_queue.put((output, addr))
logger.log(logging.DEBUG, "Sent natify response to %s:%d..." % (addr[0], addr[1]))
logger.log(logging.DEBUG, utils.pretty_print_hex(output))
elif recv_data[7] == '\x0d': # Report
logger.log(logging.DEBUG, "Received report command from %s:%s..." % (addr[0], addr[1]))
logger.log(logging.DEBUG, utils.pretty_print_hex(recv_data))
# Report response
output = bytearray(recv_data[:21])
output[7] = 0x0e # Report response
output[14] = 0 # Clear byte to match real server's response
self.write_queue.put((output, addr))
elif recv_data[7] == '\x0f':
# Natneg v4 command thanks to Pipian.
# Only seems to be used in very few DS games (namely, Pokemon Black/White/Black 2/White 2).
logger.log(logging.DEBUG, "Received pre-init command from %s:%s..." % (addr[0], addr[1]))
logger.log(logging.DEBUG, utils.pretty_print_hex(recv_data))
session = utils.get_int(recv_data[-4:], 0)
# Report response
output = bytearray(recv_data[:-4]) + bytearray([0, 0, 0, 0])
output[7] = 0x10 # Pre-init response
if session == 0:
# What's the correct behavior when session == 0?
output[13] = 2
elif session in self.natneg_preinit_session:
# Should this be sent to both clients or just the one that connected most recently?
# I can't tell from a one sided packet capture of Pokemon.
# For the time being, send to both clients just in case.
output[13] = 2
self.write_queue.put((output, self.natneg_preinit_session[session]))
output[12] = (1, 0)[output[12]] # Swap the index
del self.natneg_preinit_session[session]
else:
output[13] = 0
self.natneg_preinit_session[session] = addr
self.write_queue.put((output, addr))
else: # Was able to connect
logger.log(logging.DEBUG, "Received unknown command %02x from %s:%s..." % (ord(recv_data[7]), addr[0], addr[1]))
def get_server_info(self, gameid, session_id, client_id):
server_info = None
servers = self.server_manager.get_natneg_server(session_id)._getvalue()
if servers == None:
return None
console = False
ipstr = self.session_list[session_id][client_id]['addr'][0]
ip = str(utils.get_ip(bytearray([int(x) for x in ipstr.split('.')]), 0, console))
console = not console
server_info = next((s for s in servers if s['publicip'] == ip), None)
if server_info == None:
ip = str(utils.get_ip(bytearray([int(x) for x in ipstr.split('.')]), 0, console))
server_info = next((s for s in servers if s['publicip'] == ip), None)
return server_info
def get_server_info_alt(self, gameid, session_id, client_id):
console = False
ipstr = self.session_list[session_id][client_id]['addr'][0]
ip = str(utils.get_ip(bytearray([int(x) for x in ipstr.split('.')]), 0, console))
console = not console
serveraddr = self.server_manager.find_server_by_local_address(ip, self.session_list[session_id][client_id]['localaddr'], self.session_list[session_id][client_id]['gameid'])._getvalue()
if serveraddr == None:
ip = str(utils.get_ip(bytearray([int(x) for x in ipstr.split('.')]), 0, console))
serveraddr = self.server_manager.find_server_by_local_address(ip, self.session_list[session_id][client_id]['localaddr'],
self.session_list[session_id][client_id]['gameid'])._getvalue()
return serveraddr
if __name__ == "__main__":
natneg_server = GameSpyNatNegServer()
natneg_server.start()
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