mirror of
https://github.com/Grasscutters/mitmproxy.git
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89 lines
3.1 KiB
Python
89 lines
3.1 KiB
Python
from __future__ import (absolute_import, print_function, division)
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import socket
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import select
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import six
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import sys
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from OpenSSL import SSL
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from netlib.exceptions import TcpException
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from netlib.tcp import ssl_read_select
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from netlib.utils import clean_bin
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from ..exceptions import ProtocolException
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from .base import Layer
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class TcpMessage(object):
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def __init__(self, client_conn, server_conn, sender, receiver, message):
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self.client_conn = client_conn
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self.server_conn = server_conn
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self.sender = sender
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self.receiver = receiver
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self.message = message
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class RawTCPLayer(Layer):
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chunk_size = 4096
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def __init__(self, ctx, logging=True):
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self.logging = logging
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super(RawTCPLayer, self).__init__(ctx)
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def __call__(self):
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self.connect()
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buf = memoryview(bytearray(self.chunk_size))
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client = self.client_conn.connection
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server = self.server_conn.connection
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conns = [client, server]
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try:
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while True:
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r = ssl_read_select(conns, 10)
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for conn in r:
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dst = server if conn == client else client
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size = conn.recv_into(buf, self.chunk_size)
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if not size:
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conns.remove(conn)
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# Shutdown connection to the other peer
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if isinstance(conn, SSL.Connection):
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# We can't half-close a connection, so we just close everything here.
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# Sockets will be cleaned up on a higher level.
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return
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else:
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dst.shutdown(socket.SHUT_WR)
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if len(conns) == 0:
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return
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continue
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tcp_message = TcpMessage(
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self.client_conn, self.server_conn,
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self.client_conn if dst == server else self.server_conn,
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self.server_conn if dst == server else self.client_conn,
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buf[:size].tobytes())
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self.channel.ask("tcp_message", tcp_message)
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dst.sendall(tcp_message.message)
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if self.logging:
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# log messages are prepended with the client address,
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# hence the "weird" direction string.
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if dst == server:
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direction = "-> tcp -> {}".format(repr(self.server_conn.address))
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else:
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direction = "<- tcp <- {}".format(repr(self.server_conn.address))
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data = clean_bin(tcp_message.message)
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self.log(
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"{}\r\n{}".format(direction, data),
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"info"
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)
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except (socket.error, TcpException, SSL.Error) as e:
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six.reraise(
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ProtocolException,
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ProtocolException("TCP connection closed unexpectedly: {}".format(repr(e))),
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sys.exc_info()[2]
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)
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