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Copy pathportforward_async.py
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executable file
·146 lines (111 loc) · 4.24 KB
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import sys
import socket
import asyncore
import logging
import optparse
logging.basicConfig(level=logging.DEBUG, format='[%(name)s:%(lineno)03d] %(message)s')
logger = logging.getLogger('portforward')
class Forwarder(asyncore.dispatcher):
def __init__(self, ip, port, remote_ip, remote_port):
asyncore.dispatcher.__init__(self)
self.remote_ip = remote_ip
self.remote_port = remote_port
self.backlog = 100
self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
self.set_reuse_addr()
self.bind((ip, port))
self.listen(self.backlog)
def handle_accept(self):
conn, addr = self.accept()
Sender(Receiver(conn), self.remote_ip, self.remote_port)
def listen(self, num):
self.accepting = True
return self.socket.listen(num)
class Receiver(asyncore.dispatcher):
def __init__(self, conn):
asyncore.dispatcher.__init__(self, conn)
self.client_ip, self.client_port = conn.getpeername()
self.from_client_buffer = ''
self.to_client_buffer = ''
self.sender = None
def readable(self):
return len(self.from_client_buffer) < 40960
def writable(self):
return len(self.to_client_buffer) > 0
def handle_connect(self):
pass
def handle_read(self):
read = self.recv(4096)
if read:
logger.debug('read %04i from %s:%d', len(read), self.client_ip, self.client_port)
self.from_client_buffer += read
def handle_write(self):
sent = self.send(self.to_client_buffer)
logger.debug('write %04i to %s:%d', sent, self.client_ip, self.client_port)
self.to_client_buffer = self.to_client_buffer[sent:]
def handle_close(self):
self.close()
if self.sender:
self.sender.close()
class Sender(asyncore.dispatcher):
def __init__(self, receiver, remote_ip, remote_port):
asyncore.dispatcher.__init__(self)
self.remote_ip = remote_ip
self.remote_port = remote_port
self.receiver = receiver
receiver.sender = self
self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
self.connect((remote_ip, remote_port))
def connect(self, address):
try:
asyncore.dispatcher.connect(self, address)
except socket.error as e:
self.handle_close()
def readable(self):
return len(self.receiver.to_client_buffer) < 40960
def writable(self):
return len(self.receiver.from_client_buffer) > 0
def handle_connect(self):
pass
def handle_read(self):
read = self.recv(4096)
if read:
logger.debug('read %04i from %s:%d', len(read), self.remote_ip, self.remote_port)
self.receiver.to_client_buffer += read
def handle_write(self):
sent = self.send(self.receiver.from_client_buffer)
logger.debug('write %04i to %s:%d', sent, self.remote_ip, self.remote_port)
self.receiver.from_client_buffer = self.receiver.from_client_buffer[sent:]
def handle_close(self):
self.close()
self.receiver.close()
def main():
parser = optparse.OptionParser()
parser.add_option('-l', '--local', dest='local_addr', help='local address:port, eg: 127.0.0.1:8080')
parser.add_option('-r', '--remote', dest='remote_addr', help='remote address:port, eg: 192.168.0.120:8080')
parser.add_option('-v', '--verbose', action='store_true', dest='verbose', help='verbose')
opts, args = parser.parse_args()
if len(sys.argv) == 1 or len(args) > 0:
parser.print_help()
sys.exit()
if ':' not in opts.local_addr or ':' not in opts.remote_addr:
parser.print_help()
sys.exit()
if opts.verbose:
logging.disable(logging.NOTSET)
else:
logging.disable(logging.CRITICAL)
local_ip, local_port = opts.local_addr.split(':')
remote_ip, remote_port = opts.remote_addr.split(':')
local_port = int(local_port)
remote_port = int(remote_port)
forwarder = Forwarder(local_ip, local_port, remote_ip, remote_port)
try:
asyncore.loop(use_poll=True)
except KeyboardInterrupt:
print 'quit'
sys.exit()
if __name__ == '__main__':
main()