Python写的Socks5协议代理服务器

#!/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): passclass 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()