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117 lines
4.4 KiB
117 lines
4.4 KiB
#!/usr/bin/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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# SOCKS5 UDP Request
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# +----+------+------+----------+----------+----------+
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# |RSV | FRAG | ATYP | DST.ADDR | DST.PORT | DATA |
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# +----+------+------+----------+----------+----------+
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# | 2 | 1 | 1 | Variable | 2 | Variable |
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# +----+------+------+----------+----------+----------+
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# SOCKS5 UDP Response
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# +----+------+------+----------+----------+----------+
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# |RSV | FRAG | ATYP | DST.ADDR | DST.PORT | DATA |
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# +----+------+------+----------+----------+----------+
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# | 2 | 1 | 1 | Variable | 2 | Variable |
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# +----+------+------+----------+----------+----------+
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# shadowsocks UDP Request (before encrypted)
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# +------+----------+----------+----------+
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# | ATYP | DST.ADDR | DST.PORT | DATA |
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# +------+----------+----------+----------+
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# | 1 | Variable | 2 | Variable |
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# +------+----------+----------+----------+
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# shadowsocks UDP Response (before encrypted)
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# +------+----------+----------+----------+
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# | ATYP | DST.ADDR | DST.PORT | DATA |
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# +------+----------+----------+----------+
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# | 1 | Variable | 2 | Variable |
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# +------+----------+----------+----------+
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# shadowsocks UDP Request and Response (after encrypted)
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# +-------+--------------+
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# | IV | PAYLOAD |
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# +-------+--------------+
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# | Fixed | Variable |
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# +-------+--------------+
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# HOW TO NAME THINGS
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# ------------------
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# `dest` means destination server, which is from DST fields in the SOCKS5
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# request
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# `local` means local server of shadowsocks
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# `remote` means remote server of shadowsocks
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# `client` means UDP clients that connects to other servers
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# `server` means the UDP server that handle user requests
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import threading
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import socket
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import event
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class UDPRelay(object):
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def __init__(self, listen_addr='127.0.0.1', listen_port=1080,
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remote_addr='127.0.0.1', remote_port=8387, password=None,
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method='table', timeout=300, is_local=True):
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self._listen_addr = listen_addr
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self._listen_port = listen_port
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self._remote_addr = remote_addr
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self._remote_port = remote_port
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self._password = password
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self._method = method
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self._timeout = timeout
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self._is_local = is_local
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self._eventloop = event.EventLoop()
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def _handle_server(self, addr, sock, data):
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# TODO
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pass
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def _handle_client(self, addr, sock, data):
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# TODO
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pass
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def _run(self):
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eventloop = self._eventloop
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server_socket = self._server_socket
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eventloop.add_fd(server_socket, event.MODE_IN)
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is_local = self._is_local
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while True:
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r = eventloop.poll()
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# TODO
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def start(self):
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addrs = socket.getaddrinfo(self._listen_addr, self._listen_port, 0,
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socket.SOCK_DGRAM, socket.SOL_UDP)
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if len(addrs) == 0:
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raise Exception("can't get addrinfo for %s:%d" %
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(self._listen_addr, self._listen_port))
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af, socktype, proto, canonname, sa = addrs[0]
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server_socket = socket.socket(af, socktype, proto)
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server_socket.bind((self._listen_addr, self._listen_port))
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server_socket.setblocking(False)
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self._server_socket = server_socket
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threading.Thread(target=self._run).start()
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