mirror of
https://github.com/barronwaffles/dwc_network_server_emulator.git
synced 2026-07-13 06:31:07 -05:00
5d9af5dace
This code needs to be cleaned up later. Figured out the proper response to handle not finding a server. Still buggy: - Mario Kart DS can get in-game but lags out during the peer-to-peer game phase. Doesn't seem to be an issue with the server because at that point the games are directly communicating? - Phantasy Star Zero can't find any hits in matchmaking, even if server info is returned.
302 lines
11 KiB
Python
302 lines
11 KiB
Python
# I found an open source implemention of this exact server I'm trying to emulate here: https://github.com/sfcspanky/Openspy-Core/blob/master/serverbrowsing/
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# Use as reference later.
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from twisted.internet.protocol import Factory
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from twisted.internet.endpoints import serverFromString
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from twisted.protocols.basic import LineReceiver
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from twisted.internet import reactor
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import socket
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import ctypes
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import time
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from threading import Thread
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import gamespy.gs_utility as gs_utils
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import other.utils as utils
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from multiprocessing.managers import BaseManager
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def get_game_id(data):
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game_id = data[5: -1]
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return game_id
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def get_server_list(game, filter, fields, max_count):
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results = server_manager.find_servers(game, filter, fields, max_count)
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return results
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class ServerListFlags:
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UNSOLICITED_UDP_FLAG = 1
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PRIVATE_IP_FLAG = 2
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CONNECT_NEGOTIATE_FLAG = 4
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ICMP_IP_FLAG = 8
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NONSTANDARD_PORT_FLAG = 16
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NONSTANDARD_PRIVATE_PORT_FLAG = 32
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HAS_KEYS_FLAG = 64
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HAS_FULL_RULES_FLAG = 128
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def generate_server_list_data(address, fields, server_info):
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output = bytearray()
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# Write the address
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output += bytearray([int(x) for x in address.host.split('.')])
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# Write the port
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output += utils.get_bytes_from_short_be(address.port)
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#if len(server_info) > 0:
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if True:
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# Write number of fields that will be returned.
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key_count = len(fields)
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output += utils.get_bytes_from_short(key_count)
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if key_count != len(fields):
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# For some reason we didn't get all of the expected data.
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print "key_count[%d] != len(fields)[%d]" % (key_count, len(fields))
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print fields
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flags_buffer = bytearray()
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# Write the fields
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for field in fields:
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output += bytearray(field) + '\0\0'
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# Start server loop here instead of including all of the fields and stuff again
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flags = 0
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if len(server_info) != 0:
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flags |= ServerListFlags.HAS_KEYS_FLAG
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if "natneg" in server_info:
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flags |= ServerListFlags.CONNECT_NEGOTIATE_FLAG
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flags_buffer += utils.get_bytes_from_int(int(server_info['publicip']))
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flags |= ServerListFlags.NONSTANDARD_PORT_FLAG
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flags_buffer += utils.get_bytes_from_short_be(int(server_info['publicport']))
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if "localip0" in server_info:
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flags |= ServerListFlags.PRIVATE_IP_FLAG
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flags_buffer += bytearray([int(x) for x in server_info['localip0'].split('.')])
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if "localport" in server_info:
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flags |= ServerListFlags.NONSTANDARD_PRIVATE_PORT_FLAG
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flags_buffer += utils.get_bytes_from_short_be(int(server_info['localport']))
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flags |= ServerListFlags.ICMP_IP_FLAG
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flags_buffer += bytearray([int(x) for x in "0.0.0.0".split('.')])
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output += bytearray([flags & 0xff])
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output += flags_buffer
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if (flags & ServerListFlags.HAS_KEYS_FLAG):
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# Write data for associated fields
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for field in fields:
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output += '\xff' + bytearray(server_info['requested'][field]) + '\0'
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output += '\0'
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output += utils.get_bytes_from_int(-1)
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return output
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class Session(LineReceiver):
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def __init__(self, addr):
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self.setRawMode() # We're dealing with binary data so set to raw mode
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self.addr = addr
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self.forward_to_client = False
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self.forward_client = ()
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def rawDataReceived(self, data):
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# First 2 bytes are the packet size.
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#
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# Third byte is the command byte.
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# According to Openspy-Core:
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# 0x00 - Server list request
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# 0x01 - Server info request
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# 0x02 - Send message request
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# 0x03 - Keep alive reply
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# 0x04 - Map loop request (?)
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# 0x05 - Player search request
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#
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# For Tetris DS, at the very least 0x00 and 0x02 need to be implemented.
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if self.forward_to_client:
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self.forward_to_client = False
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# Find session id of server
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# Iterate through the list of servers sent to the client and match by IP and port.
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# Is there a better way to determine this information?
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ip = str(ctypes.c_int32(utils.get_int(bytearray([int(x) for x in self.forward_client[0].split('.')]), 0)).value)
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print "Trying to send message to %s:%d..." % (self.forward_client[0], self.forward_client[1])
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utils.print_hex(bytearray(data))
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# Get server based on ip/port
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server = server_manager.find_server_by_address(ip, self.forward_client[1])._getvalue()
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print server
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if server == None:
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pass
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#print "%s %s" % (ip, server['publicip'])
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if server['publicip'] == ip and server['publicport'] == str(self.forward_client[1]):
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# Send command to server to get it to connect to natneg
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natneg_session = int(utils.generate_random_hex_str(8), 16) # Quick and lazy way to get a random 32bit integer. Replace with something else late.r
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output = bytearray([0xfe, 0xfd, 0x06])
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output += utils.get_bytes_from_int(server['__session__'])
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output += bytearray(utils.get_bytes_from_int(natneg_session))
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output += bytearray(data)
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client_s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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client_s.sendto(output, self.forward_client)
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utils.print_log("Forwarded data to %s:%s..." % (self.forward_client[0], self.forward_client[1]))
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return
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if data[2] == '\x00': # Server list request
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utils.print_log("Received server list request from %s:%s..." % (self.addr.host, self.addr.port))
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# This code is so... not python. The C programmer in me is coming out strong.
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# TODO: Rewrite this section later?
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idx = 3
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list_version = ord(data[idx])
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idx += 1
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encoding_version = ord(data[idx])
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idx += 1
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game_version = utils.get_int(data, idx)
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idx += 4
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query_game = utils.get_string(data, idx)
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idx += len(query_game) + 1
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game_name = utils.get_string(data, idx)
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idx += len(game_name) + 1
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challenge = data[idx:idx+8]
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idx += 8
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filter = utils.get_string(data, idx)
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idx += len(filter) + 1
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fields = utils.get_string(data, idx)
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idx += len(fields) + 1
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options = utils.get_int_be(data, idx)
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idx += 4
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source_ip = 0
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max_servers = 0
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ALTERNATE_SOURCE_IP = 0x08
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LIMIT_RESULT_COUNT = 0x80
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if (options & LIMIT_RESULT_COUNT):
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max_servers = utils.get_int(data, idx)
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elif (options & ALTERNATE_SOURCE_IP):
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source_ip = utils.get_int(data, idx)
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if '\\' in fields:
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fields = [x for x in fields.split('\\') if x and not x.isspace()]
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#print "%02x %02x %08x" % (list_version, encoding_version, game_version)
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#print "%s" % query_game
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print "%s" % game_name
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#print "%s" % challenge
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print "%s" % filter
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print "%s" % fields
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#print "%08x" % options
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#print "%d %08x" % (max_servers, source_ip)
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# Requesting ip and port of client, not server
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if filter == "" or fields == "":
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output = bytearray([int(x) for x in self.addr.host.split('.')])
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output += utils.get_bytes_from_short_be(self.addr.port)
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self.transport.write(bytes(output))
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print "Responding with own IP and port..."
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utils.print_hex(output)
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elif:
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self.find_server(query_game, filter, fields, max_servers, game_name, challenge)
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elif data[2] == '\x02': # Send message request
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dest_addr = '.'.join(["%d" % ord(x) for x in data[3:7]])
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dest_port = utils.get_short_be(data, 7) # What's the pythonic way to do this? unpack?
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dest = (dest_addr, dest_port)
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utils.print_log("Received send message request from %s:%s to %s:%d..." % (self.addr.host, self.addr.port, dest_addr, dest_port))
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utils.print_hex(bytearray(data))
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self.forward_to_client = True
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self.forward_client = dest
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elif data[2] == '\x03': # Keep alive reply
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utils.print_log("Received keep alive from %s:%s..." % (self.addr.host, self.addr.port))
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else:
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utils.print_log("Received unknown command (%02x) from %s:%s..." % (ord(data[2]), self.addr.host, self.addr.port))
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utils.print_hex(bytearray(data))
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utils.print_hex(data)
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def find_server(self, query_game, filter, fields, max_servers, game_name, challenge):
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# Get dictionary from master server list server.
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print "Searching for server matching '%s' with the fields '%s'" % (filter, fields)
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start = time.time()
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self.server_list = get_server_list(query_game, filter, fields, max_servers)._getvalue()
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print "Found server(s):"
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print self.server_list
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if self.server_list == []:
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self.server_list.append({})
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for _server in self.server_list:
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server = _server
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if len(server) > 0 and len(fields) > 0 and server['requested'] == {}:
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# If the requested fields weren't found then don't return a server.
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# This fixes a bug with Mario Kart DS.
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print "Requested was empty"
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server = {}
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# Generate binary server list data
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data = generate_server_list_data(self.addr, fields, server)
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utils.print_hex(data)
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# Encrypt data
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enc = gs_utils.EncTypeX()
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data = enc.encrypt(secret_key_list[game_name], challenge, data)
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# Send to client
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self.transport.write(bytes(data))
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utils.print_log("Sent server list message to %s:%s..." % (self.addr.host, self.addr.port))
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break
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class SessionFactory(Factory):
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def __init__(self):
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print "Now listening for connections..."
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def buildProtocol(self, addr):
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return Session(addr)
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# Initialize server list server connection
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class GamespyServerDatabase(BaseManager):
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pass
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GamespyServerDatabase.register("get_server_list")
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GamespyServerDatabase.register("modify_server_list")
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GamespyServerDatabase.register("find_servers")
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GamespyServerDatabase.register("find_server_by_address")
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manager_address = ("127.0.0.1", 27500)
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manager_password = ""
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server_manager = GamespyServerDatabase(address = manager_address, authkey= manager_password)
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server_manager.connect()
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secret_key_list = gs_utils.generate_secret_keys("gslist.cfg")
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endpoint = serverFromString(reactor, "tcp:28910")
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conn = endpoint.listen(SessionFactory())
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reactor.run() |