allow to configure bind technique in GUI

guiwrapper/start_app.go

@@ -14,6 +14,7 @@ import (
 	"github.com/inverse-inc/wireguard-go/binutils"
 	"github.com/inverse-inc/wireguard-go/util"
 	"github.com/inverse-inc/wireguard-go/wgrpc"
+	"github.com/inverse-inc/wireguard-go/ztn"
 )
 
 var spacePlaceholder = "                          "
@@ -101,6 +102,14 @@ func PromptCredentials(tabs *container.AppTabs, callback func(bool)) {
 	installRoutesFromServerEntry := widget.NewCheck("Install routes from server", func(bool) {})
 	installRoutesFromServerEntry.Checked = true
 
+	preferedBindTechniqueEntry := widget.NewSelect([]string{
+		string(ztn.BindUPNPGID),
+		string(ztn.BindSTUN),
+		string(ztn.BindNATPMP),
+		string(ztn.BindThroughPeer),
+	}, func(string) {})
+	preferedBindTechniqueEntry.PlaceHolder = string(ztn.BindAutomatic)
+
 	connect := func() {
 
 		showFormError := func(msg string) {
@@ -139,6 +148,10 @@ func PromptCredentials(tabs *container.AppTabs, callback func(bool)) {
 		}
 		binutils.Setenv("WG_HONOR_ROUTES", honorRoutesStr)
 
+		if preferedBindTechniqueEntry.Selected != string(ztn.BindAutomatic) {
+			binutils.Setenv("WG_BIND_TECHNIQUE", preferedBindTechniqueEntry.Selected)
+		}
+
 		PostConnect(tabs)
 		callback(true)
 	}
@@ -173,6 +186,10 @@ func PromptCredentials(tabs *container.AppTabs, callback func(bool)) {
 		widget.NewHBox(
 			installRoutesFromServerEntry,
 		),
+		widget.NewHBox(
+			widget.NewLabel("Bind technique"),
+			preferedBindTechniqueEntry,
+		),
 	)
 
 	Refresh()

ztn/bind_techniques.go

@@ -37,6 +37,7 @@ const (
 	// These will get ordered in the BindTechniques.
 	// Lower string == tried first if available
 	// NAT PMP hasn't worked well in a few places so its left to be tried last
+	BindAutomatic   = BindTechnique("AUTOMATIC")
 	BindUPNPGID     = BindTechnique("UPNPGID")
 	BindSTUN        = BindTechnique("STUN")
 	BindNATPMP      = BindTechnique("NATPMP")