Fix Tailscale DNS

protocol/tailscale/endpoint.go

@@ -39,6 +39,7 @@ import (
 	"github.com/sagernet/sing/service"
 	"github.com/sagernet/sing/service/filemanager"
 	"github.com/sagernet/tailscale/ipn"
+	tsDNS "github.com/sagernet/tailscale/net/dns"
 	"github.com/sagernet/tailscale/net/netmon"
 	"github.com/sagernet/tailscale/net/tsaddr"
 	"github.com/sagernet/tailscale/tsnet"
@@ -145,6 +146,7 @@ func NewEndpoint(ctx context.Context, router adapter.Router, logger log.ContextL
 		LookupHook: func(ctx context.Context, host string) ([]netip.Addr, error) {
 			return dnsRouter.Lookup(ctx, host, outboundDialer.(dialer.ResolveDialer).QueryOptions())
 		},
+		DNS: &dnsConfigurtor{},
 	}
 	return &Endpoint{
 		Adapter:                endpoint.NewAdapter(C.TypeTailscale, tag, []string{N.NetworkTCP, N.NetworkUDP}, nil),
@@ -471,3 +473,24 @@ func (d *endpointDialer) ListenPacket(ctx context.Context, destination M.Socksad
 	d.logger.InfoContext(ctx, "output packet connection")
 	return d.Dialer.ListenPacket(ctx, destination)
 }
+
+type dnsConfigurtor struct {
+	baseConfig tsDNS.OSConfig
+}
+
+func (c *dnsConfigurtor) SetDNS(cfg tsDNS.OSConfig) error {
+	c.baseConfig = cfg
+	return nil
+}
+
+func (c *dnsConfigurtor) SupportsSplitDNS() bool {
+	return true
+}
+
+func (c *dnsConfigurtor) GetBaseConfig() (tsDNS.OSConfig, error) {
+	return c.baseConfig, nil
+}
+
+func (c *dnsConfigurtor) Close() error {
+	return nil
+}