mitmproxy/libmproxy/protocol2/socks_proxy.py

from __future__ import (absolute_import, print_function, division)

from ..exceptions import ProtocolException
from ..proxy import ProxyError, Socks5ProxyMode
from .layer import Layer, ServerConnectionMixin


class Socks5Proxy(Layer, ServerConnectionMixin):
    def __call__(self):
        try:
            s5mode = Socks5ProxyMode(self.config.ssl_ports)
            address = s5mode.get_upstream_server(self.client_conn)[2:]
        except ProxyError as e:
            # TODO: Unmonkeypatch
            raise ProtocolException(str(e), e)

        self.server_conn.address = address

        # TODO: Kill event

        layer = self.ctx.next_layer(self)

        try:
            layer()
        finally:
            if self.server_conn:
                self._disconnect()