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251 lines (205 loc) · 7.45 KB
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#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# Copyright 2017 Falseen
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
from __future__ import absolute_import, division, print_function, \
with_statement, nested_scopes
import sys
del sys.modules['socket']
import sys
import time
import logging
import types
import functools
path = sys.path[0]
sys.path.pop(0)
# import real socket
import socket
import struct
import binascii
sys.path.insert(0, path)
PROXY_TYPE = "socks5"
PROXY_ADDR = "127.0.0.1"
PROXY_PORT = 1080
SOCKS5_REQUEST_DATA = b"\x05\x01\x00"
BUF_SIZE = 32 * 1024
def to_bytes(s):
if bytes != str:
if type(s) == str:
return s.encode('utf-8')
return s
def to_str(s):
if bytes != str:
if type(s) == bytes:
return s.decode('utf-8')
return s
def pack_addr(address):
address_str = to_str(address)
address = to_bytes(address)
for family in (socket.AF_INET, socket.AF_INET6):
try:
r = socket.inet_pton(family, address_str)
if family == socket.AF_INET6:
return b'\x04' + r
else:
return b'\x01' + r
except (TypeError, ValueError, OSError, IOError):
pass
if len(address) > 255:
address = address[:255] # TODO
return b'\x03' + chr(len(address)) + address
# 动态patch类方法
def new_class_method(_class, method_name, new_method):
method = getattr(_class, method_name)
info = sys.version_info
if info[0] >= 3:
setattr(_class, method_name,
types.MethodType(lambda *args, **kwds: new_method(method, *args, **kwds), _class))
else:
setattr(_class, method_name,
types.MethodType(lambda *args, **kwds: new_method(method, *args, **kwds), None, _class))
# 动态patch实例方法
def new_self_method(self, method_name, new_method):
method = getattr(self, method_name)
setattr(self, method_name, types.MethodType(lambda *args, **
kwds: new_method(method, *args, **kwds), self, self))
def set_self_blocking(function):
@functools.wraps(function)
def wrapper(*args, **kwargs):
self = args[0]
try:
_is_blocking = self.gettimeout()
# if not blocking then set blocking
if _is_blocking == 0:
self.setblocking(True)
return function(*args, **kwargs)
except Exception as e:
print(e)
raise
finally:
# set orgin blcoking
if _is_blocking == 0:
self.setblocking(False)
return wrapper
def _SOCKS5_request(self, dst_addr, dst_port):
logging.debug("send socks5 hello")
self.send(SOCKS5_REQUEST_DATA)
recv_data = self.recv(BUF_SIZE)
if recv_data == b"\x05\x00":
logging.debug("recv socks5 hello %s" % binascii.hexlify(recv_data))
else:
logging.debug("not socks5 proxy %s" % binascii.hexlify(recv_data))
pass
socks5_cmd = struct.pack(">B", self.type)
dst_port_b = struct.pack('>H', dst_port)
dst_addr_b = pack_addr(dst_addr)
header_data = b"\x05" + socks5_cmd + b"\x00" + dst_addr_b + dst_port_b
logging.debug("send socks5 header %s:%d" % (dst_addr, dst_port))
self.send(header_data)
recv_data = self.recv(BUF_SIZE)
if recv_data[1] == b"\x00":
logging.debug("recv socks5 header %s" %
binascii.hexlify(recv_data))
else:
logging.debug("connect socks5 proxy faild %s" %
binascii.hexlify(recv_data))
# 处理send ，此处为实例方法
def new_send(real_method, self, *args, **kwds):
return_value = real_method(*args, **kwds)
return return_value
def new_sendto(real_method, self, *args, **kwds):
data, dst_addrs = args
dst_addr, dst_port = dst_addrs
if dst_port == 53:
self._is_proxy = True
UDP_SOCKS5_HEADER = b"\x00\x00\x00"
new_dst_addr = "8.8.8.8"
dst_addr_b = pack_addr(new_dst_addr)
dst_port_b = struct.pack('>H', dst_port)
send_data = UDP_SOCKS5_HEADER + dst_addr_b + dst_port_b + data
PROXY_ADDRS = (PROXY_ADDR, PROXY_PORT)
new_args = args[2:]
logging.debug("send udp socks5 data to %s:%d" %
(PROXY_ADDR, PROXY_PORT))
return_value = real_method(send_data, PROXY_ADDRS, *new_args, **kwds)
else:
return_value = real_method(*args, **kwds)
return return_value
def new_recvfrom(real_method, self, *args, **kwds):
return_value = real_method(*args, **kwds)
if self._is_proxy:
data, addr = return_value
print("data", binascii.hexlify(data))
return_value = (data, addr)
logging.debug("recv udp socks5 data from %s:%d" %
(PROXY_ADDR, PROXY_PORT))
return return_value
def new_recv(real_method, self, *args, **kwds):
return_value = real_method(*args, **kwds)
return return_value
# 处理connect，此处为类方法
@set_self_blocking
def new_connect(real_method, self, *args, **kwds):
if self.type == 1:
dst_addr, dst_port = args[0]
PROXY_ADDRS = (PROXY_ADDR, PROXY_PORT)
new_args = args[1:]
logging.info("connect dst %s:%d use proxy %s:%d" %
(dst_addr, dst_port, PROXY_ADDR, PROXY_PORT))
try:
real_method(self, PROXY_ADDRS, *new_args, **kwds)
except socket.error as ERROR:
logging.error("%s Connt connect to proxy %s:%d" %
(ERROR, PROXY_ADDR, PROXY_PORT))
raise
else:
_SOCKS5_request(self, dst_addr, dst_port)
elif self.type == 3:
# UDP TODO
pass
else:
return_value = real_method(self, *args, **kwds)
# make a new socket class
class new_socket(socket.socket):
def __init__(self, *args, **kwds):
super(new_socket, self).__init__(*args, **kwds)
# new_self_method(self, 'sendto', new_sendto)
# new_self_method(self, 'recvfrom', new_recvfrom)
self._is_proxy = False
@set_self_blocking
def connect(self, *args, **kwds):
if self.type == 1:
dst_addr, dst_port = args[0]
PROXY_ADDRS = (PROXY_ADDR, PROXY_PORT)
new_args = args[1:]
logging.info("connect dst %s:%d use proxy %s:%d" %
(dst_addr, dst_port, PROXY_ADDR, PROXY_PORT))
try:
super(new_socket, self).connect(PROXY_ADDRS, *new_args, **kwds)
except socket.error as ERROR:
logging.error("%s Connt connect to proxy %s:%d" %
(ERROR, PROXY_ADDR, PROXY_PORT))
raise
else:
_SOCKS5_request(self, dst_addr, dst_port)
elif self.type == 3:
# UDP TODO
pass
else:
return_value = super(new_socket, self).connect(*args, **kwds)
# replace socket class to new_socket
socket.socket = new_socket
#new_class_method(socket.socket, 'connect', new_connect)