Add windows bridge

protocol/bridge/backend.go

@@ -1,5 +1,6 @@
-//go:build linux || darwin
+//go:build linux || darwin || (windows && (amd64 || 386))
 
+//nolint:unused
 package bridge
 
 import (
@@ -11,6 +12,7 @@ import (
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/option"
 	"github.com/sagernet/sing-tun"
+	"github.com/sagernet/sing/common/control"
 	E "github.com/sagernet/sing/common/exceptions"
 	"github.com/sagernet/sing/common/logger"
 )
@@ -98,6 +100,31 @@ func (b *backendBase) DetachReturn(returnPath tun.Return) error {
 	return nil
 }
 
+func (b *backendBase) registerMonitors(syncFunc func()) {
+	var unregisterFuncs []func()
+	networkMonitor := b.networkManager.NetworkMonitor()
+	if networkMonitor != nil {
+		networkElement := networkMonitor.RegisterCallback(syncFunc)
+		unregisterFuncs = append(unregisterFuncs, func() { networkMonitor.UnregisterCallback(networkElement) })
+	} else if b.boundInterface != "" {
+		b.logger.Debug("network monitor unavailable, pinned egress will not track interface changes")
+	}
+	if b.boundInterface == "" {
+		interfaceMonitor := b.networkManager.InterfaceMonitor()
+		if interfaceMonitor != nil {
+			interfaceElement := interfaceMonitor.RegisterCallback(func(_ *control.Interface, _ int) { syncFunc() })
+			unregisterFuncs = append(unregisterFuncs, func() { interfaceMonitor.UnregisterCallback(interfaceElement) })
+		}
+	}
+	if len(unregisterFuncs) > 0 {
+		b.unregister = func() {
+			for _, unregisterFunc := range unregisterFuncs {
+				unregisterFunc()
+			}
+		}
+	}
+}
+
 func (b *backendBase) syncSessionEgress() {
 	b.egressAccess.Lock()
 	defer b.egressAccess.Unlock()