From c79c4cff1000ec0ee15b270e2e7aa68676ced969 Mon Sep 17 00:00:00 2001
From: Sage <49195270+sagerenn@users.noreply.github.com>
Date: Mon, 11 Nov 2024 16:14:00 +0000
Subject: [PATCH] set outbound tag of the selector for dns route

---
 outbound/selector.go |  3 +++
 route/router.go      | 13 +++++++++----
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/outbound/selector.go b/outbound/selector.go
index e801daea..02f9a94d 100644
--- a/outbound/selector.go
+++ b/outbound/selector.go
@@ -153,6 +153,9 @@ func (s *Selector) NewPacketConnection(ctx context.Context, conn N.PacketConn, m
 }
 
 func RealTag(detour adapter.Outbound) string {
+	if s, ok := detour.(*Selector); ok {
+		return RealTag(s.selected)
+	}
 	if group, isGroup := detour.(adapter.OutboundGroup); isGroup {
 		return group.Now()
 	}
diff --git a/route/router.go b/route/router.go
index c8fe94be..e32815ee 100644
--- a/route/router.go
+++ b/route/router.go
@@ -20,16 +20,17 @@ import (
 	"github.com/sagernet/sing-box/common/process"
 	"github.com/sagernet/sing-box/common/sniff"
 	"github.com/sagernet/sing-box/common/taskmonitor"
+	"github.com/sagernet/sing-box/constant"
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/experimental/libbox/platform"
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
 	"github.com/sagernet/sing-box/outbound"
 	"github.com/sagernet/sing-box/transport/fakeip"
-	"github.com/sagernet/sing-dns"
-	"github.com/sagernet/sing-mux"
-	"github.com/sagernet/sing-tun"
-	"github.com/sagernet/sing-vmess"
+	dns "github.com/sagernet/sing-dns"
+	mux "github.com/sagernet/sing-mux"
+	tun "github.com/sagernet/sing-tun"
+	vmess "github.com/sagernet/sing-vmess"
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/buf"
 	"github.com/sagernet/sing/common/bufio"
@@ -1113,6 +1114,10 @@ func (r *Router) match(ctx context.Context, metadata *adapter.InboundContext, de
 		}
 	}
 	ctx = outbound.ContextWithTag(ctx, matchOutbound.Tag())
+	if matchOutbound.Type() == constant.TypeSelector {
+		tag := outbound.RealTag(matchOutbound)
+		metadata.Outbound = tag
+	}
 	return ctx, matchRule, matchOutbound, nil
 }