class Session(object):

def __init__(self, address):

self.session = ""

self.challenge = ""

self.secretkey = "" # Parse gslist.cfg later

self.sent_challenge = False

self.address = address

self.console = 0

self.playerid = 0

self.gamename = ""

self.keepalive = -1

def __init__(self):

self.sessions = {}

# Generate a dictionary "secret_key_list" containing the secret game keys associated with their game IDs.

# The dictionary key will be the game's ID, and the value will be the secret key.

self.secret_key_list = gs_utils.generate_secret_keys("gslist.cfg")

#self.log(logging.DEBUG, address, "Generated list of secret game keys...")

self.db = gs_database.GamespyDatabase()

GameSpyServerDatabase.register("update_server_list")

GameSpyServerDatabase.register("delete_server")

def log(self, level, address, message):

if address == None:

logger.log(level, "%s", message)

else:

logger.log(level, "[%s:%d] %s", address[0], address[1], message)

def start(self):

manager_address = ("127.0.0.1", 27500)

manager_password = ""

self.server_manager = GameSpyServerDatabase(address = manager_address, authkey= manager_password)

self.server_manager.connect()

# Start QR server

address = ('0.0.0.0', 27900) # 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)

logger.log(logging.INFO, "Server is now listening on %s:%s..." % (address[0], address[1]))

# Dependencies! I don't really like this solution but it's easier than trying to manage it another way.

server_browser_server = GameSpyServerBrowserServer(self)

server_browser_server_thread = threading.Thread(target=server_browser_server.start())

server_browser_server_thread.start()

threading.Timer(1, self.keepalive_check).start()

self.wait_loop()

def wait_loop(self):

while 1:

recv_data, address = self.socket.recvfrom(2048)

# Tetris DS overlay 10 @ 02144184 - Handle responses back to server

# Tetris DS overlay 10 @ 02144184 - Handle responses back to server

#

# After some more packet inspection, it seems the format goes something like this:

# - All server messages seem to always start with \xfe\xfd.

# - The first byte from the client (or third byte from the server) is a command.

# - Bytes 2 - 5 from the client is some kind of ID. This will have to be inspected later. I believe it's a

# session-like ID because the number changes between connections. Copying the client's ID might be enough.

#

# The above was as guessed.

# The code in Tetris DS (overlay 10) @ 0216E974 handles the network command creation.

# R1 contains the command to be sent to the server.

# R2 contains a pointer to some unknown integer that gets written after the command.

#

# - Commands

# Commands range from 0x00 to 0x09 (for client only at least?) (Tetris DS overlay 10 @ 0216DDCC)

#

# CLIENT:

# 0x01 - Response (Tetris DS overlay 10 @ 216DCA4)

# Sends back base64 of RC4 encrypted string that was gotten from the server's 0x01.

#

# 0x03 - Send client state? (Tetris DS overlay 10 @ 216DA30)

# Data sent:

# 1) Loop for each localip available on the system, write as localip%d\x00(local ip)

# 2) localport\x00(local port)

# 3) natneg (either 0 or 1)

# 4) ONLY IF STATE CHANGED: statechanged\x00(state) (Possible values: 0, 1, 2, 3)

# 5) gamename\x00(game name)

# 6) ONLY IF PUBLIC IP AND PORT ARE AVAILABLE: publicip\x00(public ip)

# 7) ONLY IF PUBLIC IP AND PORT ARE AVAILABLE: publicport\x00(public port)

#

# if statechanged != 2:

# Write various other data described here: http://docs.poweredbygamespy.com/wiki/Query_and_Reporting_Implementation

#

# 0x07 - Unknown, related to server's 0x06 (returns value sent from server)

#

# 0x08 - Keep alive? Sent after 0x03

#

# 0x09 - Availability check

#

# SERVER:

# 0x01 - Unknown

# Data sent:

# 8 random ASCII characters (?) followed by the public IP and port of the client as a hex string

#

# 0x06 - Unknown

# First 4 bytes is some kind of id? I believe it's a unique identifier for the data being sent,

# seeing how the server can send the same IP information many times in a row. If the IP information has

# already been parsed then it doesn't waste time handling it.

#

# After that is a "SBCM" section which is 0x14 bytes in total.

# SBCM information gets parsed at 2141A0C in Tetris DS overlay 10.

# Seems to contain IP address information.

#

# The SBCM seems to contain a little information that must be parsed before.

# After the SBCM:

# \x03\x00\x00\x00 - Always the same?

# \x01 - Found player?

# \x04 - Unknown

# (2 bytes) - Unknown. Port?

# (4 bytes) - Player's IP

# (4 bytes) - Unknown. Some other IP? Remote server IP?

# \x00\x00\x00\x00 - Unknown but seems to get checked

#

# Another SBCM, after a player has been found and attempting to start a game:

# \x03\x00\x00\x00 - Always the same?

# \x05 - Connecting to player?

# \x00 - Unknown

# (2 bytes) - Unknown. Port? Same as before.

# (4 bytes) - Player's IP

# (4 bytes) - Unknown. Some other IP? Remote server IP?

#

# 0x0a - Response to 0x01

# Gets sent after receiving 0x01 from the client. So, server 0x01 -> client 0x01 -> server 0x0a.

# Has no other data besides the client ID.

#

# - \xfd\xfc commands get passed directly between the other player(s)?

#

#

# Open source version of GameSpy found here: https://github.com/sfcspanky/Openspy-Core/tree/master/qr

# Use as reference.

if recv_data[0] != '\x09':

# Don't add a session if the client is trying to check if the game is available or not

session_id = struct.unpack("<I", recv_data[1:5])[0]

session_id_raw = recv_data[1:5]

if session_id not in self.sessions:

# Found a new session, add to session list

self.sessions[session_id] = self.Session(address)

self.sessions[session_id].session = session_id

self.sessions[session_id].keepalive = int(time.time())

# Handle commands

if recv_data[0] == '\x00': # Query

self.log(logging.DEBUG, address, "NOT IMPLEMENTED! Received query from %s:%s... %s" % (address[0], address[1], recv_data[5:]))

elif recv_data[0] == '\x01': # Challenge

self.log(logging.DEBUG, address, "Received challenge from %s:%s... %s" % (address[0], address[1], recv_data[5:]))

# Prepare the challenge sent from the server to be compared

challenge = gs_utils.prepare_rc4_base64(self.sessions[session_id].secretkey, self.sessions[session_id].challenge)

# Compare challenge

client_challenge = recv_data[5:-1]

if client_challenge == challenge:

# Challenge succeeded

# Send message back to client saying it was accepted

packet = bytearray([0xfe, 0xfd, 0x0a]) # Send client registered command

packet.extend(session_id_raw) # Get the session ID

self.socket.sendto(packet, address)

self.log(logging.DEBUG, address, "Sent client registered to %s:%s..." % (address[0], address[1]))

else:

# Failed the challenge, request another during the next heartbeat

self.sessions[session_id].sent_challenge = False

elif recv_data[0] == '\x02': # Echo

self.log(logging.DEBUG, address, "NOT IMPLEMENTED! Received echo from %s:%s... %s" % (address[0], address[1], recv_data[5:]))

elif recv_data[0] == '\x03': # Heartbeat

data = recv_data[5:]

self.log(logging.DEBUG, address, "Received heartbeat from %s:%s... %s" % (address[0], address[1], data))

# Parse information from heartbeat here

d = data.rstrip('\0').split('\0')

# It may be safe to ignore "unknown" keys because the proper key names get filled in later...

k = {}

for i in range(0, len(d), 2):

#self.log(logging.DEBUG, address, "%s = %s" % (d[i], d[i+1]))

k[d[i]] = d[i+1]

if "gamename" in k:

self.sessions[session_id].secretkey = self.secret_key_list[k['gamename']]

#print "Got secret key %s for %s" % (self.sessions[session_id].secretkey, k['gamename'])

if self.sessions[session_id].playerid == 0 and "dwc_pid" in k:

# Get the player's id and then query the profile to figure out what console they are on.

# The endianness of some server data depends on the endianness of the console, so we must be able

# to account for that.

self.sessions[session_id].playerid = int(k['dwc_pid'])

profile = self.db.get_profile_from_profileid(self.sessions[session_id].playerid)

if "console" in profile:

self.sessions[session_id].console = profile['console']

if self.sessions[session_id].sent_challenge == False:

addr_hex = ''.join(["%02X" % int(x) for x in address[0].split('.')])

port_hex = "%04X" % int(address[1])

server_challenge = utils.generate_random_str(8) + addr_hex + port_hex

self.sessions[session_id].challenge = server_challenge

packet = bytearray([0xfe, 0xfd, 0x01]) # Send challenge command

packet.extend(session_id_raw) # Get the session ID

packet.extend(server_challenge)

packet.extend('\x00')

self.socket.sendto(packet, address)

self.log(logging.DEBUG, address, "Sent challenge to %s:%s..." % (address[0], address[1]))

self.sessions[session_id].sent_challenge = True

if 'publicip' in k and k['publicip'] == "0": #and k['dwc_hoststate'] == "2": # When dwc_hoststate == 2 then it doesn't send an IP, so calculate it ourselves

if self.sessions[session_id].console != 0:

k['publicip'] = str(ctypes.c_int32(utils.get_int_be(bytearray([int(x) for x in address[0].split('.')]), 0)).value) # Wii

else:

k['publicip'] = str(ctypes.c_int32(utils.get_int(bytearray([int(x) for x in address[0].split('.')]), 0)).value) # DS

if "statechanged" in k:

if k['statechanged'] == "1": # Create server

#if k['publicport'] != "0" and k['publicip'] != "0":

# dwc_mtype controls what kind of server query we're looking for.

# dwc_mtype = 0 is used when looking for a matchmaking game.

# dwc_mtype = 1 is unknown.

# dwc_mtype = 2 is used when hosting a friends only game (possibly other uses too).

# dwc_mtype = 3 is used when looking for a friends only game (possibly other uses too).

# Some memory could be saved by clearing out any unwanted fields from k before sending.

self.server_manager.update_server_list(k['gamename'], session_id, k, self.sessions[session_id].console)._getvalue()

if session_id in self.sessions:

self.sessions[session_id].gamename = k['gamename']

elif k['statechanged'] == "2": # Close server

self.server_manager.delete_server(k['gamename'] , session_id)

if session_id in self.sessions:

self.sessions.pop(session_id)

elif recv_data[0] == '\x04': # Add Error

self.log(logging.WARNING, address, "NOT IMPLEMENTED! Received add error from %s:%s... %s" % (address[0], address[1], recv_data[5:]))

elif recv_data[0] == '\x05': # Echo Response

self.log(logging.WARNING, address, "NOT IMPLEMENTED! Received echo response from %s:%s... %s" % (address[0], address[1], recv_data[5:]))

elif recv_data[0] == '\x06': # Client Message

self.log(logging.WARNING, address, "NOT IMPLEMENTED! Received echo from %s:%s... %s" % (address[0], address[1], recv_data[5:]))

elif recv_data[0] == '\x07': # Client Message Ack

#self.log(logging.WARNING, address, "NOT IMPLEMENTED! Received client message ack from %s:%s... %s" % (address[0], address[1], recv_data[5:]))

self.log(logging.DEBUG, address, "Received client message ack from %s:%s..." % (address[0], address[1]))

elif recv_data[0] == '\x08': # Keep Alive

self.log(logging.DEBUG, address, "Received keep alive from %s:%s..." % (address[0], address[1]))

self.sessions[session_id].keepalive = int(time.time())

elif recv_data[0] == '\x09': # Available

# Availability check only sent to *.available.gs.nintendowifi.net

self.log(logging.DEBUG, address, "Received availability request for '%s' from %s:%s..." % (recv_data[5: -1], address[0], address[1]))

self.socket.sendto(bytearray([0xfe, 0xfd, 0x09, 0x00, 0x00, 0x00, 0x00]), address)

elif recv_data[0] == '\x0a': # Client Registered

# Only sent to client, never received?

self.log(logging.WARNING, address, "NOT IMPLEMENTED! Received client registered from %s:%s... %s" % (address[0], address[1], recv_data[5:]))

else:

self.log(logging.ERROR, address, "Unknown request from %s:%s:" % (address[0], address[1]))

self.log(logging.DEBUG, address, utils.pretty_print_hex(recv_data))

def keepalive_check(self):

while 1:

#self.log(logging.DEBUG, None, "Keep alive check on %d sessions" % (len(self.sessions)))

pruned = []

for session_id in self.sessions:

now = int(time.time())

delta = now - self.sessions[session_id].keepalive

timeout = 60 # Remove clients that haven't responded in 60 seconds

if delta < 0 or delta >= timeout:

pruned.append(session_id)

self.server_manager.delete_server(self.sessions[session_id].gamename, self.sessions[session_id].session)

self.log(logging.DEBUG, None, "Keep alive check removed %s:%s for game %s" % (self.sessions[session_id].address[0], self.sessions[session_id].address[1], self.sessions[session_id].gamename))

for session_id in pruned:

del self.sessions[session_id]