神人风范

用Python写socks5服务器端

参考自RFC1928: http://xiaoxia.org/?p=2672

直接运行这个程序就给本机建立了一个socks5的代理服务器。

代码如下：

import socket, sys, select, SocketServer, struct, time
class ThreadingTCPServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer): pass
class Socks5Server(SocketServer.StreamRequestHandler):
def handle_tcp(self, sock, remote):
fdset = [sock, remote]
while True:
r, w, e = select.select(fdset, [], [])
if sock in r:
if remote.send(sock.recv(4096)) <= 0: break
if remote in r:
if sock.send(remote.recv(4096)) <= 0: break
def handle(self):
try:
print 'socks connection from ', self.client_address
sock = self.connection
# 1. Version
sock.recv(262)
sock.send(b"\x05\x00");
# 2. Request
data = self.rfile.read(4)
mode = ord(data[1])
addrtype = ord(data[3])
if addrtype == 1:       # IPv4
addr = socket.inet_ntoa(self.rfile.read(4))
elif addrtype == 3:     # Domain name
addr = self.rfile.read(ord(sock.recv(1)[0]))
port = struct.unpack('>H', self.rfile.read(2))
reply = b"\x05\x00\x00\x01"
try:
if mode == 1:  # 1. Tcp connect
remote = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
remote.connect((addr, port[0]))
print 'Tcp connect to', addr, port[0]
else:
reply = b"\x05\x07\x00\x01" # Command not supported
local = remote.getsockname()
reply += socket.inet_aton(local[0]) + struct.pack(">H", local[1])
except socket.error:
# Connection refused
reply = '\x05\x05\x00\x01\x00\x00\x00\x00\x00\x00'
sock.send(reply)
# 3. Transfering
if reply[1] == '\x00':  # Success
if mode == 1:    # 1. Tcp connect
self.handle_tcp(sock, remote)
except socket.error:
print 'socket error'
def main():
server = ThreadingTCPServer(('', 1080), Socks5Server)
server.serve_forever()
if __name__ == '__main__':
main()

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