Add advertise tags support for Tailscale endpoint

protocol/tailscale/endpoint.go

@@ -97,6 +97,7 @@ type Endpoint struct {
 	exitNodeAllowLANAccess     bool
 	advertiseRoutes            []netip.Prefix
 	advertiseExitNode          bool
+	advertiseTags              []string
 	relayServerPort            *uint16
 	relayServerStaticEndpoints []netip.AddrPort
 
@@ -244,6 +245,7 @@ func NewEndpoint(ctx context.Context, router adapter.Router, logger log.ContextL
 		exitNodeAllowLANAccess:     options.ExitNodeAllowLANAccess,
 		advertiseRoutes:            options.AdvertiseRoutes,
 		advertiseExitNode:          options.AdvertiseExitNode,
+		advertiseTags:              options.AdvertiseTags,
 		relayServerPort:            options.RelayServerPort,
 		relayServerStaticEndpoints: options.RelayServerStaticEndpoints,
 		udpTimeout:                 udpTimeout,
@@ -359,25 +361,25 @@ func (t *Endpoint) Start(stage adapter.StartStage) error {
 	localBackend := t.server.ExportLocalBackend()
 	perfs := &ipn.MaskedPrefs{
 		Prefs: ipn.Prefs{
-			RouteAll: t.acceptRoutes,
+			RouteAll:        t.acceptRoutes,
+			AdvertiseRoutes: t.advertiseRoutes,
+			AdvertiseTags:   t.advertiseTags,
 		},
-		RouteAllSet:        true,
-		ExitNodeIPSet:      true,
-		AdvertiseRoutesSet: true,
-	}
-	if len(t.advertiseRoutes) > 0 {
-		perfs.AdvertiseRoutes = t.advertiseRoutes
+		RouteAllSet:                   true,
+		ExitNodeIPSet:                 true,
+		AdvertiseRoutesSet:            true,
+		AdvertiseTagsSet:              true,
+		RelayServerPortSet:            true,
+		RelayServerStaticEndpointsSet: true,
 	}
 	if t.advertiseExitNode {
 		perfs.AdvertiseRoutes = append(perfs.AdvertiseRoutes, tsaddr.ExitRoutes()...)
 	}
 	if t.relayServerPort != nil {
 		perfs.RelayServerPort = t.relayServerPort
-		perfs.RelayServerPortSet = true
 	}
 	if len(t.relayServerStaticEndpoints) > 0 {
 		perfs.RelayServerStaticEndpoints = t.relayServerStaticEndpoints
-		perfs.RelayServerStaticEndpointsSet = true
 	}
 	_, err = localBackend.EditPrefs(perfs)
 	if err != nil {