#!/usr/bin/env ruby

require 'net/ssh'
require 'yaml'

=begin
To make this work just add "GatewayPorts yes" to /etc/sshd_config in your server
Also, make sure that config['remote_port'] is open in your server.

the config file (config/tunnel.yml) looks like this:

username: tunnlr3442
host: ssh1.tunnlr.com
password: my-password
remote_port: 12785
local_port: 3000

=end



config = YAML.load_file('./config/tunnel.yml')

begin
  ssh = Net::SSH::start(config['host'], config['username'], :password => config['password'])
  ssh.forward.remote_to(config['local_port'], '127.0.0.1', config['remote_port'], '0.0.0.0')

  puts "Started!"
  ssh.loop { true  }
rescue Errno::ECONNREFUSED
  puts "Please start the web server"
  retry
rescue Net::SSH::Exception
  retry # retry if the connection is lost
end