概述

直接上代码：

#!/usr/bin/python 
# Filename s5.py 
# Python Dynamic Socks5 Proxy 
# Usage: python s5.py 1080 
# Background Run: nohup python s5.py 1080 & 

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: 
      pass # print 'from ',self.client_address nothing to do. 
      sock = self.connection 
      # 1. Version 
      sock.recv(262) 
      sock.send("\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 = "\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])) 
          pass # print 'To',addr,port[0] nothing do to. 
        else: 
          reply = "\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: 
      pass #print 'error' nothing to do . 
    except IndexError: 
      pass 
def main(): 
  filename = sys.argv[0]; 
  if len(sys.argv)<2: 
    print 'usage: ' + filename + ' port' 
    sys.exit() 
  socks_port = int(sys.argv[1]);   
  server = ThreadingTCPServer(('',socks_port),Socks5Server) 
  print 'bind port: %d' % socks_port + ' ok!' 
  server.serve_forever() 
if __name__ == '__main__': 
  main()

总结

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