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#!/usr/bin/python | |
import socket | |
import select | |
import fcntl | |
import struct | |
import errno | |
import os | |
import asyncore | |
import sys | |
proxy_port = 1080 | |
try: | |
proxy = sys.argv[1].split(':') | |
proxy_server = proxy[0] | |
if len(proxy) > 1: | |
proxy_port = int(proxy[1]) | |
host = sys.argv[2].split(':') | |
if len(host) > 2: | |
listen_port = int(host[0]) | |
connect_address = host[1] | |
connect_port = int(host[2]) | |
if len(host) > 1: | |
connect_address = host[0] | |
connect_port = int(host[1]) | |
listen_port = connect_port | |
else: | |
connect_address = 'localhost' | |
connect_port = int(host[0]) | |
listen_port = connect_port | |
except: | |
print 'socks_forward.py <proxy>[:<port>] [<listen_port:][<address>:]<port>' | |
sys.exit(1) | |
class socks_client(asyncore.dispatcher_with_send): | |
def __init__(self, sock): | |
asyncore.dispatcher_with_send.__init__(self, sock) | |
self.pc = None | |
self.waiting = False | |
def set_pass(self, pc): | |
self.pc = pc; | |
if self.waiting: | |
self.pc.send(self.recv(8192)) | |
def handle_close(self): | |
if self.pc is not None: | |
self.pc.finish() | |
sys.exit(0) | |
def finish(self): | |
self.socket.setblocking(1) | |
self.socket.send(self.out_buffer) | |
def handle_read(self): | |
if self.pc is None: | |
self.waiting = True | |
else: | |
self.pc.send(self.recv(8192)) | |
class pass_client(asyncore.dispatcher_with_send): | |
def __init__(self, host, port, sc): | |
asyncore.dispatcher_with_send.__init__(self) | |
self.sc = sc | |
self.create_socket(socket.AF_INET, socket.SOCK_STREAM) | |
self.connect((host, port)) | |
self.host = host | |
self.port = port | |
def handle_connect(self): | |
print 'Connected to', self.host + ':' + str(self.port) | |
def handle_close(self): | |
self.sc.finish() | |
sys.exit(0) | |
def finish(self): | |
self.socket.setblocking(1) | |
self.socket.send(self.out_buffer) | |
def handle_read(self): | |
self.sc.send(self.recv(8192)) | |
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) | |
s.connect((proxy_server, proxy_port)) | |
s.send(struct.pack('!BBHIB', 4, 2, listen_port, 0, 0)) | |
ver, resp, port, ip = struct.unpack('!BBHI', s.recv(8)) | |
ip = struct.pack('!I', ip); | |
if resp == 91: | |
raise Exception("Denied") | |
elif resp != 90: | |
raise Exception("Unknown response") | |
print 'Granted, ip', socket.inet_ntoa(ip), 'port', port | |
ver, resp, port, ip = struct.unpack('!BBHI', s.recv(8)) | |
if resp != 90: | |
raise Exception("Connect failed") | |
ip = struct.pack('!I', ip); | |
print 'Connection from', socket.inet_ntoa(ip) + ':' + str(port) | |
sc = socks_client(s) | |
pc = pass_client(connect_address, connect_port, sc) | |
sc.set_pass(pc) | |
asyncore.loop() |
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