19 lines
644 B
Python
19 lines
644 B
Python
import logging
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import struct
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from ..network.enums import types as TYPE
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from .. import glob
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logger = logging.getLogger(__name__)
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def handle(client: "Client", data: bytes) -> bytes:
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challenge = (client.ip_uint ^ glob.challenge_short) & TYPE.MAX_USHORT
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challenge_solution = challenge ^ 0x6969 # 0x6969 being client_version?
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challenge_answer = struct.unpack_from(b">H", data, 1)[0]
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if challenge_answer != challenge_solution:
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return struct.pack(b">BH", 0x1A, challenge)
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client.state = 1 # CHALLENGE_PASSED
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return b"\x19\x00" # 0x19: Valid_challenge; leading 0x00 byte due to some routers shitting itself if only 1 byte is sent/received
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