Implemented port forwarding for node.

import logging

import os.path

import struct

import socket

import termios

from fcntl import ioctl

from itertools import chain, imap

            rshell=self.rshell,

            rshell_resize=self.rshell_resize,

            rshell_wait=self.rshell_wait,

            forward=self.forward,

        ))

        # running shells

        self.shells = dict()

    def rshell_wait(self, label):

        """Wait for a tunnel termination."""

        return self.shells[label].wait_n_close()

    @pass_connection

    def forward(self, conn, label, port, destination='127.0.0.1'):

        # create socket

        try:

            sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

        except socket.error:

            logger.exception('Cannot create socket in forward handler')

            raise

        try:

            sock.connect((destination, port))

        except socket.error:

            logger.exception('Error while connecting to destination (forward)')

            raise

        # create tunnel

        conn.create_tunnel(label=label, endpoint=sock)