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363 lines
13 KiB
363 lines
13 KiB
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# Copyright (c) 2014 clowwindy
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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from __future__ import with_statement
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import sys
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if sys.version_info < (2, 6):
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import simplejson as json
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else:
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import json
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try:
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import gevent
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import gevent.monkey
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gevent.monkey.patch_all(dns=gevent.version_info[0] >= 1)
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except ImportError:
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gevent = None
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print >>sys.stderr, 'warning: gevent not found, using threading instead'
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import socket
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import eventloop
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import errno
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import select
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import SocketServer
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import struct
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import os
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import random
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import re
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import logging
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import getopt
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import encrypt
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import utils
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import udprelay
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MSG_FASTOPEN = 0x20000000
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def send_all(sock, data):
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bytes_sent = 0
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while True:
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r = sock.send(data[bytes_sent:])
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if r < 0:
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return r
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bytes_sent += r
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if bytes_sent == len(data):
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return bytes_sent
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class ThreadingTCPServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
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allow_reuse_address = True
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class Socks5Server(SocketServer.StreamRequestHandler):
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@staticmethod
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def get_server():
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a_port = config_server_port
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a_server = config_server
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if isinstance(config_server_port, list):
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# support config like "server_port": [8081, 8082]
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a_port = random.choice(config_server_port)
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if isinstance(config_server, list):
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# support config like "server": ["123.123.123.1", "123.123.123.2"]
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a_server = random.choice(config_server)
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r = re.match(r'^(.*):(\d+)$', a_server)
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if r:
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# support config like "server": "123.123.123.1:8381"
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# or "server": ["123.123.123.1:8381", "123.123.123.2:8381"]
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a_server = r.group(1)
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a_port = int(r.group(2))
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return a_server, a_port
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@staticmethod
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def handle_tcp(sock, remote, encryptor, pending_data=None,
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server=None, port=None):
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connected = False
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try:
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if config_fast_open:
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fdset = [sock]
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else:
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fdset = [sock, remote]
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while True:
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should_break = False
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r, w, e = select.select(fdset, [], [])
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if sock in r:
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if not connected and config_fast_open:
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data = sock.recv(4096)
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data = encryptor.encrypt(pending_data + data)
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pending_data = None
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logging.info('fast open %s:%d' % (server, port))
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try:
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remote.sendto(data, MSG_FASTOPEN, (server, port))
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except (OSError, IOError) as e:
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if eventloop.errno_from_exception(e) == errno.EINPROGRESS:
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pass
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else:
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raise e
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connected = True
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fdset = [sock, remote]
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else:
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data = sock.recv(4096)
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if pending_data:
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data = pending_data + data
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pending_data = None
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data = encryptor.encrypt(data)
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if len(data) <= 0:
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should_break = True
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else:
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result = send_all(remote, data)
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if result < len(data):
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raise Exception('failed to send all data')
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if remote in r:
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data = encryptor.decrypt(remote.recv(4096))
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if len(data) <= 0:
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should_break = True
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else:
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result = send_all(sock, data)
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if result < len(data):
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raise Exception('failed to send all data')
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if should_break:
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# make sure all data are read before we close the sockets
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# TODO: we haven't read ALL the data, actually
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# http://cs.ecs.baylor.edu/~donahoo/practical/CSockets/TCPRST.pdf
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break
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finally:
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sock.close()
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remote.close()
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def handle(self):
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try:
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encryptor = encrypt.Encryptor(config_password, config_method)
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sock = self.connection
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sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
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data = sock.recv(262)
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if not data:
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sock.close()
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return
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if len(data) < 3:
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return
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method = ord(data[2])
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if method == 2:
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logging.warn('client tries to use username/password auth, prete'
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'nding the password is OK')
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sock.send('\x05\x02')
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try:
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ver_ulen = sock.recv(2)
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ulen = ord(ver_ulen[1])
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if ulen:
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username = sock.recv(ulen)
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assert(ulen == len(username))
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plen = ord(sock.recv(1))
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if plen:
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_password = sock.recv(plen)
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assert(plen == len(_password))
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sock.send('\x01\x00')
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except Exception as e:
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logging.error(e)
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return
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elif method == 0:
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sock.send("\x05\x00")
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else:
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logging.error('unsupported method %d' % method)
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return
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data = self.rfile.read(4) or '\x00' * 4
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mode = ord(data[1])
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if mode == 1:
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pass
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elif mode == 3:
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# UDP
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logging.debug('UDP assc request')
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if sock.family == socket.AF_INET6:
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header = '\x05\x00\x00\x04'
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else:
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header = '\x05\x00\x00\x01'
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addr, port = sock.getsockname()
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addr_to_send = socket.inet_pton(sock.family, addr)
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port_to_send = struct.pack('>H', port)
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sock.send(header + addr_to_send + port_to_send)
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while True:
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data = sock.recv(4096)
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if not data:
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break
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return
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else:
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logging.warn('unknown mode %d' % mode)
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return
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addrtype = ord(data[3])
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addr_to_send = data[3]
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if addrtype == 1:
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addr_ip = self.rfile.read(4)
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addr = socket.inet_ntoa(addr_ip)
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addr_to_send += addr_ip
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elif addrtype == 3:
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addr_len = self.rfile.read(1)
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addr = self.rfile.read(ord(addr_len))
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addr_to_send += addr_len + addr
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elif addrtype == 4:
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addr_ip = self.rfile.read(16)
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addr = socket.inet_ntop(socket.AF_INET6, addr_ip)
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addr_to_send += addr_ip
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else:
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logging.warn('addr_type not supported')
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# not supported
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return
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addr_port = self.rfile.read(2)
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addr_to_send += addr_port
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port = struct.unpack('>H', addr_port)
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try:
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reply = "\x05\x00\x00\x01"
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reply += socket.inet_aton('0.0.0.0') + struct.pack(">H", 2222)
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self.wfile.write(reply)
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# reply immediately
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a_server, a_port = Socks5Server.get_server()
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addrs = socket.getaddrinfo(a_server, a_port)
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if addrs:
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af, socktype, proto, canonname, sa = addrs[0]
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if config_fast_open:
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remote = socket.socket(af, socktype, proto)
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remote.setsockopt(socket.IPPROTO_TCP,
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socket.TCP_NODELAY, 1)
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Socks5Server.handle_tcp(sock, remote, encryptor,
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addr_to_send, a_server, a_port)
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else:
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logging.info('connecting %s:%d' % (addr, port[0]))
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remote = socket.create_connection((a_server, a_port))
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remote.setsockopt(socket.IPPROTO_TCP,
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socket.TCP_NODELAY, 1)
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Socks5Server.handle_tcp(sock, remote, encryptor,
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addr_to_send)
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except (OSError, IOError) as e:
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logging.warn(e)
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return
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except (OSError, IOError) as e:
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raise e
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logging.warn(e)
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def main():
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global config_server, config_server_port, config_password, config_method,\
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config_fast_open
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logging.basicConfig(level=logging.DEBUG,
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format='%(asctime)s %(levelname)-8s %(message)s',
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datefmt='%Y-%m-%d %H:%M:%S', filemode='a+')
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# fix py2exe
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if hasattr(sys, "frozen") and sys.frozen in \
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("windows_exe", "console_exe"):
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p = os.path.dirname(os.path.abspath(sys.executable))
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os.chdir(p)
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version = ''
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try:
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import pkg_resources
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version = pkg_resources.get_distribution('shadowsocks').version
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except:
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pass
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print 'shadowsocks %s' % version
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config_password = None
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config_method = None
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config_path = utils.find_config()
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try:
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optlist, args = getopt.getopt(sys.argv[1:], 's:b:p:k:l:m:c:t:',
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['fast-open'])
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for key, value in optlist:
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if key == '-c':
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config_path = value
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if config_path:
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logging.info('loading config from %s' % config_path)
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with open(config_path, 'rb') as f:
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try:
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config = json.load(f)
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except ValueError as e:
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logging.error('found an error in config.json: %s',
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e.message)
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sys.exit(1)
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else:
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config = {}
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optlist, args = getopt.getopt(sys.argv[1:], 's:b:p:k:l:m:c:t:',
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['fast-open'])
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for key, value in optlist:
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if key == '-p':
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config['server_port'] = int(value)
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elif key == '-k':
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config['password'] = value
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elif key == '-l':
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config['local_port'] = int(value)
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elif key == '-s':
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config['server'] = value
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elif key == '-m':
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config['method'] = value
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elif key == '-b':
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config['local_address'] = value
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elif key == '--fast-open':
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config['fast_open'] = True
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except getopt.GetoptError as e:
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logging.error(e)
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utils.print_local_help()
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sys.exit(2)
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config_server = config['server']
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config_server_port = config['server_port']
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config_local_port = config['local_port']
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config_password = config['password']
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config_method = config.get('method', None)
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config_local_address = config.get('local_address', '127.0.0.1')
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config_timeout = int(config.get('timeout', 300))
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config_fast_open = config.get('fast_open', False)
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if not config_password and not config_path:
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sys.exit('config not specified, please read '
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'https://github.com/clowwindy/shadowsocks')
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utils.check_config(config)
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encrypt.init_table(config_password, config_method)
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addrs = socket.getaddrinfo(config_local_address, config_local_port)
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if not addrs:
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logging.error('cant resolve listen address')
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sys.exit(1)
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ThreadingTCPServer.address_family = addrs[0][0]
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try:
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udprelay.UDPRelay(config_local_address, int(config_local_port),
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config_server, config_server_port, config_password,
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config_method, int(config_timeout), True).start()
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server = ThreadingTCPServer((config_local_address, config_local_port),
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Socks5Server)
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logging.info("starting local at %s:%d" %
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tuple(server.server_address[:2]))
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server.serve_forever()
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except socket.error, e:
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logging.error(e)
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except KeyboardInterrupt:
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server.shutdown()
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sys.exit(0)
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if __name__ == '__main__':
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main()
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