tailscale: Fix handle peer DNS query

go.mod

@@ -43,8 +43,8 @@ require (
 	github.com/sagernet/sing-tun v0.8.12-0.20260727151122-3a09076491df
 	github.com/sagernet/sing-vmess v0.2.8-0.20250909125414-3aed155119a1
 	github.com/sagernet/smux v1.5.50-sing-box-mod.1
-	github.com/sagernet/tailscale v1.92.4-sing-box-1.13-mod.8
+	github.com/sagernet/tailscale v1.92.4-sing-box-1.13-mod.9
-	github.com/sagernet/wireguard-go v0.0.2-beta.1.0.20260224074747-506b7631853c
+	github.com/sagernet/wireguard-go v0.0.4
 	github.com/sagernet/ws v0.0.0-20231204124109-acfe8907c854
 	github.com/spf13/cobra v1.10.2
 	github.com/stretchr/testify v1.11.1

go.sum

@@ -254,10 +254,10 @@ github.com/sagernet/sing-vmess v0.2.8-0.20250909125414-3aed155119a1 h1:aSwUNYUkV
 github.com/sagernet/sing-vmess v0.2.8-0.20250909125414-3aed155119a1/go.mod h1:P11scgTxMxVVQ8dlM27yNm3Cro40mD0+gHbnqrNGDuY=
 github.com/sagernet/smux v1.5.50-sing-box-mod.1 h1:XkJcivBC9V4wBjiGXIXZ229aZCU1hzcbp6kSkkyQ478=
 github.com/sagernet/smux v1.5.50-sing-box-mod.1/go.mod h1:NjhsCEWedJm7eFLyhuBgIEzwfhRmytrUoiLluxs5Sk8=
-github.com/sagernet/tailscale v1.92.4-sing-box-1.13-mod.8 h1:vchb9moOQIxPVOLpTUo2iyZ2E2oUaBpvAh3bBPcEqIM=
+github.com/sagernet/tailscale v1.92.4-sing-box-1.13-mod.9 h1:ytlmw4f8AOjyJH3SeDMF4j6tQ679W4+dMS0JMl/e7pQ=
-github.com/sagernet/tailscale v1.92.4-sing-box-1.13-mod.8/go.mod h1:m87GAn4UcesHQF3leaPFEINZETO5za1LGn1GJdNDgNc=
+github.com/sagernet/tailscale v1.92.4-sing-box-1.13-mod.9/go.mod h1:p8Ms8FbGlwQJyHb862XmdShTS50fFJ8C71VdO6xvWyk=
-github.com/sagernet/wireguard-go v0.0.2-beta.1.0.20260224074747-506b7631853c h1:f9cXNB+IOOPnR8DOLMTpr42jf7naxh5Un5Y09BBf5Cg=
+github.com/sagernet/wireguard-go v0.0.4 h1:w/vHtk7AzMG37+D/uQROBL72Gj/Gj+FHMY5kg4q0CQ4=
-github.com/sagernet/wireguard-go v0.0.2-beta.1.0.20260224074747-506b7631853c/go.mod h1:WUxgxUDZoCF2sxVmW+STSxatP02Qn3FcafTiI2BLtE0=
+github.com/sagernet/wireguard-go v0.0.4/go.mod h1:hEqi4y5czEg6LYtX2Bpjg+lV0b/J1n+5rA885Z66Mx0=
 github.com/sagernet/ws v0.0.0-20231204124109-acfe8907c854 h1:6uUiZcDRnZSAegryaUGwPC/Fj13JSHwiTftrXhMmYOc=
 github.com/sagernet/ws v0.0.0-20231204124109-acfe8907c854/go.mod h1:LtfoSK3+NG57tvnVEHgcuBW9ujgE8enPSgzgwStwCAA=
 github.com/spf13/cobra v1.10.2 h1:DMTTonx5m65Ic0GOoRY2c16WCbHxOOw6xxezuLaBpcU=

protocol/tailscale/endpoint.go

@@ -27,9 +27,10 @@ import (
 	"github.com/sagernet/sing-box/adapter/endpoint"
 	"github.com/sagernet/sing-box/common/dialer"
 	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/dns"
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
-	"github.com/sagernet/sing-box/route/rule"
+	R "github.com/sagernet/sing-box/route/rule"
 	"github.com/sagernet/sing-tun"
 	"github.com/sagernet/sing-tun/ping"
 	"github.com/sagernet/sing/common"
@@ -60,6 +61,7 @@ import (
 	"github.com/sagernet/tailscale/wgengine/router"
 	"github.com/sagernet/tailscale/wgengine/wgcfg"
 
+	mDNS "github.com/miekg/dns"
 	"go4.org/netipx"
 )
 
@@ -260,6 +262,8 @@ func NewEndpoint(ctx context.Context, router adapter.Router, logger log.ContextL
 
 func (t *Endpoint) Start(stage adapter.StartStage) error {
 	switch stage {
+	case adapter.StartStateInitialize:
+		t.server.PeerDNSQueryHandler = (*peerDNSQueryHandler)(t)
 	case adapter.StartStateStart:
 		return t.start()
 	case adapter.StartStatePostStart:
@@ -678,9 +682,9 @@ func (t *Endpoint) PrepareConnection(network string, source M.Socksaddr, destina
 	}, routeContext, timeout, false)
 	if err != nil {
 		switch {
-		case rule.IsBypassed(err):
+		case R.IsBypassed(err):
 			err = nil
-		case rule.IsRejected(err):
+		case R.IsRejected(err):
 			t.logger.Trace("reject ", network, " connection from ", source.AddrString(), " to ", destination.AddrString())
 		default:
 			if network == N.NetworkICMP {
@@ -888,3 +892,30 @@ func (c *dnsConfigurtor) GetBaseConfig() (tsDNS.OSConfig, error) {
 func (c *dnsConfigurtor) Close() error {
 	return nil
 }
+
+type peerDNSQueryHandler Endpoint
+
+func (t *peerDNSQueryHandler) HandlePeerDNSQuery(ctx context.Context, query []byte, sourceAddress netip.AddrPort, allowName func(name string) bool) ([]byte, error) {
+	var message mDNS.Msg
+	err := message.Unpack(query)
+	if err != nil {
+		return nil, err
+	}
+	for _, question := range message.Question {
+		if allowName != nil && !allowName(question.Name) {
+			return dns.FixedResponseStatus(&message, mDNS.RcodeRefused).Pack()
+		}
+	}
+	var metadata adapter.InboundContext
+	metadata.Inbound = t.Tag()
+	metadata.InboundType = t.Type()
+	metadata.Source = M.SocksaddrFromNetIP(sourceAddress)
+	response, err := t.dnsRouter.Exchange(adapter.WithContext(ctx, &metadata), &message, adapter.DNSQueryOptions{})
+	if err != nil {
+		if !R.IsRejected(err) && !E.IsClosedOrCanceled(err) {
+			t.logger.ErrorContext(ctx, E.Cause(err, "process peer DNS query"))
+		}
+		return nil, err
+	}
+	return response.Pack()
+}