mirror of
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65 lines
2 KiB
Python
65 lines
2 KiB
Python
# Pyrofork - Telegram MTProto API Client Library for Python
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# Copyright (C) 2017-present Dan <https://github.com/delivrance>
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# Copyright (C) 2022-present Mayuri-Chan <https://github.com/Mayuri-Chan>
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#
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# This file is part of Pyrofork.
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#
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# Pyrofork is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Pyrofork is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with Pyrofork. If not, see <http://www.gnu.org/licenses/>.
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import logging
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from binascii import crc32
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from struct import pack, unpack
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from typing import Optional, Tuple
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from .tcp import TCP, Proxy
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log = logging.getLogger(__name__)
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class TCPFull(TCP):
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def __init__(self, ipv6: bool, proxy: Proxy) -> None:
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super().__init__(ipv6, proxy)
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self.seq_no: Optional[int] = None
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async def connect(self, address: Tuple[str, int]) -> None:
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await super().connect(address)
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self.seq_no = 0
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async def send(self, data: bytes, *args) -> None:
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data = pack("<II", len(data) + 12, self.seq_no) + data
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data += pack("<I", crc32(data))
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self.seq_no += 1
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await super().send(data)
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async def recv(self, length: int = 0) -> Optional[bytes]:
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length = await super().recv(4)
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if length is None:
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return None
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packet = await super().recv(unpack("<I", length)[0] - 4)
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if packet is None:
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return None
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packet = length + packet
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checksum = packet[-4:]
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packet = packet[:-4]
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if crc32(packet) != unpack("<I", checksum)[0]:
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return None
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return packet[8:]
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