Remove forwarded_port_key/destination from config, replace with guest_port

config/default.rb

@@ -6,8 +6,7 @@ Vagrant::Config.run do |config|
 
   config.ssh.username = "vagrant"
   config.ssh.host = "127.0.0.1"
-  config.ssh.forwarded_port_key = "ssh"
-  config.ssh.forwarded_port_destination = 22
+  config.ssh.guest_port = 22
   config.ssh.max_tries = 100
   config.ssh.timeout = 10
   config.ssh.forward_agent = false

lib/vagrant/config/ssh.rb

@@ -3,24 +3,44 @@ module Vagrant
     class SSHConfig < Base
       attr_accessor :username
       attr_accessor :host
-      attr_accessor :forwarded_port_key
-      attr_accessor :forwarded_port_destination
+      attr_accessor :port
+      attr_accessor :guest_port
       attr_accessor :max_tries
       attr_accessor :timeout
       attr_accessor :private_key_path
       attr_accessor :forward_agent
       attr_accessor :forward_x11
       attr_accessor :shell
-      attr_accessor :port
 
       def initialize
         @shell            = "bash"
         @port             = nil
+        @guest_port       = nil
         @forward_agent    = false
         @forward_x11      = false
         @private_key_path = nil
       end
 
+      def forwarded_port_key=(value)
+        raise Errors::DeprecationError, :message => <<-MESSAGE
+`config.ssh.forwarded_port_key` is now gone. You must now use
+`config.ssh.guest_port` which is expected to be the port on the
+guest that SSH is listening on. Vagrant will automatically scan
+the forwarded ports to look for a forwarded port from this port
+and use it.
+        MESSAGE
+      end
+
+      def forwarded_port_destination=(value)
+        raise Errors::DeprecationError, :message => <<-MESSAGE
+`config.ssh.forwarded_port_destination` is now gone. You must now use
+`config.ssh.guest_port` which is expected to be the port on the
+guest that SSH is listening on. Vagrant will automatically scan
+the forwarded ports to look for a forwarded port from this port
+and use it.
+        MESSAGE
+      end
+
       def validate(env, errors)
         [:username, :host, :forwarded_port_key, :max_tries, :timeout].each do |field|
           errors.add(I18n.t("vagrant.config.common.error_empty", :field => field)) if !instance_variable_get("@#{field}".to_sym)

lib/vagrant/driver/virtualbox.rb

@@ -434,6 +434,16 @@ module Vagrant
         end
       end
 
+      # This reads the SSH port from the VM.
+      def ssh_port(expected_port)
+        # Look for the forwarded port only by comparing the guest port
+        read_forwarded_ports.each do |_, _, hostport, guestport|
+          return hostport if guestport == expected_port
+        end
+
+        nil
+      end
+
       # Starts the virtual machine in the given mode.
       #
       # @param [String] mode Mode to boot the VM: either "headless" or "gui"

lib/vagrant/ssh.rb

@@ -188,26 +188,12 @@ module Vagrant
       return @vm.config.ssh.port if @vm.config.ssh.port
 
       # Check if we have an SSH forwarded port
-      pnum_by_name = nil
-      pnum_by_destination = nil
       @vm.driver.read_forwarded_ports.each do |_, name, hostport, guestport|
-        # Record the forwarded port if we find it by name
-        if name == @vm.config.ssh.forwarded_port_key
-          pnum_by_name = hostport
+        if guestport == @vm.config.ssh.guest_port
+          return hostport
         end
-
-        if guestport == @vm.config.ssh.forwarded_port_destination
-          pnum_by_destination = hostport
       end
 
-        # pnum_by_name is what we're looking for here, so break early
-        # if we have it.
-        break if pnum_by_name
-      end
-
-      return pnum_by_name if pnum_by_name
-      return pnum_by_destination if pnum_by_destination
-
       # This should NEVER happen.
       raise Errors::SSHPortNotDetected
     end

lib/vagrant/vm.rb

@@ -81,7 +81,7 @@ module Vagrant
     def ssh_info
       results = {
         :host          => config.ssh.host,
-        :port          => config.ssh.port || driver.ssh_port,
+        :port          => config.ssh.port || driver.ssh_port(config.ssh.guest_port),
         :username      => config.ssh.username,
         :forward_agent => config.ssh.forward_agent,
         :forward_x11   => config.ssh.forward_x11