import sys import select import paramiko import socket from appPublic.background import Background try: import SocketServer except ImportError: import socketserver as SocketServer class ForwardServer(SocketServer.ThreadingTCPServer): daemon_threads = True allow_reuse_address = True g_verbose = True def verbose(s): if g_verbose: print(s) class Handler(SocketServer.BaseRequestHandler): def handle(self): try: chan = self.ssh_transport.open_channel( "direct-tcpip", (self.chain_host, self.chain_port), self.request.getpeername(), ) except Exception as e: verbose( "Incoming request to %s:%d failed: %s" % (self.chain_host, self.chain_port, repr(e)) ) return if chan is None: verbose( "Incoming request to %s:%d was rejected by the SSH server." % (self.chain_host, self.chain_port) ) return verbose( "Connected! Tunnel open %r -> %r -> %r" % ( self.request.getpeername(), chan.getpeername(), (self.chain_host, self.chain_port), ) ) while True: r, w, x = select.select([self.request, chan], [], []) if self.request in r: data = self.request.recv(1024) if len(data) == 0: break chan.send(data) if chan in r: data = chan.recv(1024) if len(data) == 0: break self.request.send(data) peername = self.request.getpeername() chan.close() self.request.close() verbose("Tunnel closed from %r" % (peername,)) def connect_ssh_server(host, port, user, password): ssh = paramiko.SSHClient() ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy()) ssh.connect(host, port=port, username=user, password=password) return ssh class SSHPortForward: def __init__(self, local_port, remote_host, remote_port, ssh_host, ssh_port, ssh_user, ssh_password): self.local_port = int(local_port) self.remote_host = remote_host self.remote_port = int(remote_port) self.ssh_host = ssh_host self.ssh_port = int(ssh_port) self.ssh_user = ssh_user self.ssh_password = ssh_password self.running = False def run(self): if self.running: return self.running = True b = Background(self._run) b.start() def _run(self): self.ssh = connect_ssh_server(self.ssh_host, self.ssh_port, self.ssh_user, self.ssh_password) self.transport = self.ssh.get_transport() class SubHandler(Handler): chain_host = socket.gethostbyname(self.remote_host) chain_port = self.remote_port local_port = self.local_port ssh_transport = self.transport self.forward_server = ForwardServer((socket.gethostbyname('localhost'), self.local_port), SubHandler) self.forward_server.serve_forever() print('forward ....') def stop(self): if not self.running: return self.running = False self.forward_server.shutdown() self.forward_server.server_close() self.transport.close() self.ssh.close() if __name__ == '__main__': if len(sys.argv) < 8: print("""Usage: {sys.argv[0] local_port remote_host remote_port ssh_host ssh_port ssh_user ssh_password """) sys.exit(1) s = SSHPortForward(*sys.argv[1:]) while True: print("""start) start server, stop) stop server quit) quit """) x = input() if x == 'start': s.run() continue if x == 'stop': s.stop() continue if x == 'quit': s.stop() break print('error input')