support connecting to vnc over ips other than localhost

the ssh support is not finished... Still working on this, but wanted to commit some progress

builder/qemu/builder.go

@@ -105,10 +105,10 @@ type Config struct {
 	ShutdownCommand string     `mapstructure:"shutdown_command"`
 	SSHHostPortMin  uint       `mapstructure:"ssh_host_port_min"`
 	SSHHostPortMax  uint       `mapstructure:"ssh_host_port_max"`
-	VncIP		string	   `mapstructure:"vnc_ip"`
 	VNCPortMin      uint       `mapstructure:"vnc_port_min"`
 	VNCPortMax      uint       `mapstructure:"vnc_port_max"`
 	VMName          string     `mapstructure:"vm_name"`
+	VncIP	        string     `mapstructure:"vnc_ip"`
 
 	// These are deprecated, but we keep them around for BC
 	// TODO(@mitchellh): remove

builder/qemu/ssh.go

@@ -8,7 +8,7 @@ import (
 )
 
 func commHost(state multistep.StateBag) (string, error) {
-	return "127.0.0.1", nil
+	return state.Get("vnc_ip").(string), nil
 }
 
 func commPort(state multistep.StateBag) (int, error) {

builder/qemu/step_forward_ssh.go

@@ -50,7 +50,7 @@ func (s *stepForwardSSH) Run(state multistep.StateBag) multistep.StepAction {
 
 	// Save the port we're using so that future steps can use it
 	state.Put("sshHostPort", sshHostPort)
-
+	state.Put("vnc_ip", config.VncIP)
 	return multistep.ActionContinue
 }
 

builder/qemu/step_type_boot_command.go

@@ -30,6 +30,7 @@ type bootCommandTemplateData struct {
 //   http_port int
 //   ui     packer.Ui
 //   vnc_port uint
+//   vnc_ip string
 //
 // Produces:
 //   <nothing>
@@ -39,13 +40,13 @@ func (s *stepTypeBootCommand) Run(state multistep.StateBag) multistep.StepAction
 	config := state.Get("config").(*Config)
 	httpPort := state.Get("http_port").(uint)
 	ui := state.Get("ui").(packer.Ui)
-	vncPort := state.Get("vnc_port").(uint)
-	vncAddr := state.Get("vnc_ip").(string)
 
+	vncIP := state.Get("vnc_ip").(string)
+	vncPort := state.Get("vnc_port").(uint)
 	// Connect to VNC
 	ui.Say("Connecting to VM via VNC")
         // tbh why is this hardcoded anyway?
-	nc, err := net.Dial("tcp", fmt.Sprintf("%s:%d", vncAddr, vncPort))
+	nc, err := net.Dial("tcp", fmt.Sprintf("%s:%d", vncIP, vncPort))
 	if err != nil {
 		err := fmt.Errorf("Error connecting to VNC: %s", err)
 		state.Put("error", err)