mirror of
https://github.com/barronwaffles/dwc_network_server_emulator.git
synced 2026-04-14 04:45:53 -05:00
74df6f1ea7
- Moved some gamespy-related utility functions to where they should've been. - Added more documentation.
74 lines
3.3 KiB
Python
74 lines
3.3 KiB
Python
# Server emulator for *.available.gs.nintendowifi.net and *.master.gs.nintendowifi.net
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import socket
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import other.utils as utils
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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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#address = ('127.0.0.1', 27900) # accessible to only the local computer
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address = ('0.0.0.0', 27900) # accessible to outside connections (use this if you don't know what you're doing)
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s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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s.bind(address)
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utils.print_log("Server is now listening on %s:%s..." % (address[0], address[1]))
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while 1:
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recv_data, addr = s.recvfrom(2048)
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# After some more packet inspection, it seems the format goes something like this:
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# - All server messages seem to always start with \xfe\xfe.
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# - The first byte from the client (or third byte from the server) is a command.
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# - Bytes 2 - 5 from the client is some kind of ID. This will have to be inspected later. I believe it's a
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# session-like ID because the number changes between connections. Copying the client's ID might be enough.
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#
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# The above was as guessed.
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# The code in Tetris DS (overlay 10) @ 0216E974 handles the network command creation.
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# R1 contains the command to be sent to the server.
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# R2 contains a pointer to some unknown integer that gets written after the command.
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#
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# - Commands
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# Commands range from 0x00 to 0x09 (for client only at least?) (Tetris DS overlay 10 @ 0216DDCC)
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#
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# CLIENT:
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# 0x01 - Unknown (Tetris DS overlay 10 @ 216DCA4)
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# 0x03 - Send client state? (Tetris DS overlay 10 @ 216DA30)
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# Data sent:
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# 1) Loop for each localip available on the system, write as localip%d\x00(local ip)
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# 2) localport\x00(local port)
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# 3) natneg (either 0 or 1)
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# 4) ONLY IF STATE CHANGED: statechanged\x00(state) (Possible values: 0, 1, 2, 3)
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# 5) gamename\x00(game name)
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# 6) ONLY IF PUBLIC IP AND PORT ARE AVAILABLE: publicip\x00(public ip)
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# 7) ONLY IF PUBLIC IP AND PORT ARE AVAILABLE: publicport\x00(public port)
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#
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# if statechanged != 2:
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# Write various other data described here: http://docs.poweredbygamespy.com/wiki/Query_and_Reporting_Implementation
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#
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# 0x07 - Unknown, related to server's 0x06 (returns value sent from server)
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#
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#
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# 0x08 - Keep alive?
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# 0x09 - Availability check
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#
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# SERVER:
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# 0x01 - Unknown
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# 0x06 - Unknown
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# 0x0a - Unknown
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#
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# - \xfd\xfc commands get passed directly between the other player(s)?
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#
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if [ord(x) for x in recv_data[0:5]] == [0x09, 0x00, 0x00, 0x00, 0x00]:
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utils.print_log("Received request for '%s' from %s:%s... %s" % (
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get_game_id(recv_data), addr[0], addr[1], [elem.encode("hex") for elem in recv_data]))
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# I have not seen any games that use anything other than \x09\x00\x00\x00\x00 + null terminated game id,
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# but just in case there are others out there, copy the data received from the game as the response.
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s.sendto(bytearray([0xfe, 0xfd, recv_data[0], recv_data[1], recv_data[2], recv_data[3], recv_data[4]]), addr)
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else:
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utils.print_log(
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"Unknown request from %s:%s: %s" % (addr[0], addr[1], [elem.encode("hex") for elem in recv_data]))
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