Bump version

Previously, the buffer was not reset within the response loop. If a packet
handle failed or completed, the buffer retained its state. Specifically,
if `ReadPacketFrom` returned `io.ErrShortBuffer`, the error was ignored
via `continue`, but the buffer remained full. This caused the next
read attempt to immediately fail with the same error, creating a tight
busy-wait loop that consumed 100% CPU.

Validates `buffer.Reset()` is called at the start of each iteration to
ensure a clean state for 'ReadPacketFrom'.

.github/workflows/lint.yml

@@ -32,7 +32,7 @@ jobs:
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v8
         with:
-          version: v2.4.0
+          version: latest
           args: --timeout=30m
           install-mode: binary
           verify: false

Makefile

@@ -38,7 +38,7 @@ fmt:
 	@gci write --custom-order -s standard -s "prefix(github.com/sagernet/)" -s "default" .
 
 fmt_install:
-	go install -v mvdan.cc/gofumpt@v0.8.0
+	go install -v mvdan.cc/gofumpt@latest
 	go install -v github.com/daixiang0/gci@latest
 
 lint:
@@ -49,7 +49,7 @@ lint:
 	GOOS=freebsd golangci-lint run ./...
 
 lint_install:
-	go install -v github.com/golangci/golangci-lint/v2/cmd/golangci-lint@v2.4.0
+	go install -v github.com/golangci/golangci-lint/v2/cmd/golangci-lint@latest
 
 proto:
 	@go run ./cmd/internal/protogen

adapter/dns.go

@@ -27,8 +27,6 @@ type DNSClient interface {
 	Start()
 	Exchange(ctx context.Context, transport DNSTransport, message *dns.Msg, options DNSQueryOptions, responseChecker func(responseAddrs []netip.Addr) bool) (*dns.Msg, error)
 	Lookup(ctx context.Context, transport DNSTransport, domain string, options DNSQueryOptions, responseChecker func(responseAddrs []netip.Addr) bool) ([]netip.Addr, error)
-	LookupCache(domain string, strategy C.DomainStrategy) ([]netip.Addr, bool)
-	ExchangeCache(ctx context.Context, message *dns.Msg) (*dns.Msg, bool)
 	ClearCache()
 }
 

common/sniff/quic.go

@@ -303,8 +303,6 @@ find:
 	metadata.Protocol = C.ProtocolQUIC
 	fingerprint, err := ja3.Compute(buffer.Bytes())
 	if err != nil {
-		metadata.Protocol = C.ProtocolQUIC
-		metadata.Client = C.ClientChromium
 		metadata.SniffContext = fragments
 		return E.Cause1(ErrNeedMoreData, err)
 	}
@@ -334,7 +332,7 @@ find:
 		}
 
 		if count(frameTypeList, frameTypeCrypto) > 1 || count(frameTypeList, frameTypePing) > 0 {
-			if maybeUQUIC(fingerprint) {
+			if isQUICGo(fingerprint) {
 				metadata.Client = C.ClientQUICGo
 			} else {
 				metadata.Client = C.ClientChromium

common/sniff/quic_blacklist.go

@@ -1,21 +1,29 @@
 package sniff
 
 import (
-	"crypto/tls"
-
 	"github.com/sagernet/sing-box/common/ja3"
 )
 
-// Chromium sends separate client hello packets, but UQUIC has not yet implemented this behavior
-// The cronet without this behavior does not have version 115
-var uQUICChrome115 = &ja3.ClientHello{
-	Version:             tls.VersionTLS12,
-	CipherSuites:        []uint16{4865, 4866, 4867},
-	Extensions:          []uint16{0, 10, 13, 16, 27, 43, 45, 51, 57, 17513},
-	EllipticCurves:      []uint16{29, 23, 24},
-	SignatureAlgorithms: []uint16{1027, 2052, 1025, 1283, 2053, 1281, 2054, 1537, 513},
-}
+const (
+	// X25519Kyber768Draft00 - post-quantum curve used by Go crypto/tls
+	x25519Kyber768Draft00 uint16 = 0x11EC // 4588
+	// renegotiation_info extension used by Go crypto/tls
+	extensionRenegotiationInfo uint16 = 0xFF01 // 65281
+)
 
-func maybeUQUIC(fingerprint *ja3.ClientHello) bool {
-	return !uQUICChrome115.Equals(fingerprint, true)
+// isQUICGo detects native quic-go by checking for Go crypto/tls specific features.
+// Note: uQUIC with Chromium mimicry cannot be reliably distinguished from real Chromium
+// since it uses the same TLS fingerprint, so it will be identified as Chromium.
+func isQUICGo(fingerprint *ja3.ClientHello) bool {
+	for _, curve := range fingerprint.EllipticCurves {
+		if curve == x25519Kyber768Draft00 {
+			return true
+		}
+	}
+	for _, ext := range fingerprint.Extensions {
+		if ext == extensionRenegotiationInfo {
+			return true
+		}
+	}
+	return false
 }

common/sniff/quic_capture_test.go

@@ -0,0 +1,188 @@
+package sniff_test
+
+import (
+	"context"
+	"crypto/tls"
+	"encoding/hex"
+	"errors"
+	"net"
+	"testing"
+	"time"
+
+	"github.com/sagernet/quic-go"
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/common/sniff"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestSniffQUICQuicGoFingerprint(t *testing.T) {
+	t.Parallel()
+	const testSNI = "test.example.com"
+
+	udpConn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 0})
+	require.NoError(t, err)
+	defer udpConn.Close()
+
+	serverAddr := udpConn.LocalAddr().(*net.UDPAddr)
+	packetsChan := make(chan [][]byte, 1)
+
+	go func() {
+		var packets [][]byte
+		udpConn.SetReadDeadline(time.Now().Add(3 * time.Second))
+		for i := 0; i < 10; i++ {
+			buf := make([]byte, 2048)
+			n, _, err := udpConn.ReadFromUDP(buf)
+			if err != nil {
+				break
+			}
+			packets = append(packets, buf[:n])
+		}
+		packetsChan <- packets
+	}()
+
+	clientConn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 0})
+	require.NoError(t, err)
+	defer clientConn.Close()
+
+	tlsConfig := &tls.Config{
+		ServerName:         testSNI,
+		InsecureSkipVerify: true,
+		NextProtos:         []string{"h3"},
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
+	defer cancel()
+
+	_, _ = quic.Dial(ctx, clientConn, serverAddr, tlsConfig, &quic.Config{})
+
+	select {
+	case packets := <-packetsChan:
+		t.Logf("Captured %d packets", len(packets))
+
+		var metadata adapter.InboundContext
+		for i, pkt := range packets {
+			err := sniff.QUICClientHello(context.Background(), &metadata, pkt)
+			t.Logf("Packet %d: err=%v, domain=%s, client=%s", i, err, metadata.Domain, metadata.Client)
+			if metadata.Domain != "" {
+				break
+			}
+		}
+
+		t.Logf("\n=== quic-go TLS Fingerprint Analysis ===")
+		t.Logf("Domain: %s", metadata.Domain)
+		t.Logf("Client: %s", metadata.Client)
+		t.Logf("Protocol: %s", metadata.Protocol)
+
+		// The client should be identified as quic-go, not chromium
+		// Current issue: it's being identified as chromium
+		if metadata.Client == "chromium" {
+			t.Log("WARNING: quic-go is being misidentified as chromium!")
+		}
+
+	case <-time.After(5 * time.Second):
+		t.Fatal("Timeout")
+	}
+}
+
+func TestSniffQUICInitialFromQuicGo(t *testing.T) {
+	t.Parallel()
+
+	const testSNI = "test.example.com"
+
+	// Create UDP listener to capture ALL initial packets
+	udpConn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 0})
+	require.NoError(t, err)
+	defer udpConn.Close()
+
+	serverAddr := udpConn.LocalAddr().(*net.UDPAddr)
+
+	// Channel to receive captured packets
+	packetsChan := make(chan [][]byte, 1)
+
+	// Start goroutine to capture packets
+	go func() {
+		var packets [][]byte
+		udpConn.SetReadDeadline(time.Now().Add(3 * time.Second))
+		for i := 0; i < 5; i++ { // Capture up to 5 packets
+			buf := make([]byte, 2048)
+			n, _, err := udpConn.ReadFromUDP(buf)
+			if err != nil {
+				break
+			}
+			packets = append(packets, buf[:n])
+		}
+		packetsChan <- packets
+	}()
+
+	// Create QUIC client connection (will fail but we capture the initial packet)
+	clientConn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 0})
+	require.NoError(t, err)
+	defer clientConn.Close()
+
+	tlsConfig := &tls.Config{
+		ServerName:         testSNI,
+		InsecureSkipVerify: true,
+		NextProtos:         []string{"h3"},
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
+	defer cancel()
+
+	// This will fail (no server) but sends initial packet
+	_, _ = quic.Dial(ctx, clientConn, serverAddr, tlsConfig, &quic.Config{})
+
+	// Wait for captured packets
+	select {
+	case packets := <-packetsChan:
+		t.Logf("Captured %d QUIC packets", len(packets))
+
+		for i, packet := range packets {
+			t.Logf("Packet %d: length=%d, first 30 bytes: %x", i, len(packet), packet[:min(30, len(packet))])
+		}
+
+		// Test sniffer with first packet
+		if len(packets) > 0 {
+			var metadata adapter.InboundContext
+			err := sniff.QUICClientHello(context.Background(), &metadata, packets[0])
+
+			t.Logf("First packet sniff error: %v", err)
+			t.Logf("Protocol: %s", metadata.Protocol)
+			t.Logf("Domain: %s", metadata.Domain)
+			t.Logf("Client: %s", metadata.Client)
+
+			// If first packet needs more data, try with subsequent packets
+			// IMPORTANT: reuse metadata to accumulate CRYPTO fragments via SniffContext
+			if errors.Is(err, sniff.ErrNeedMoreData) && len(packets) > 1 {
+				t.Log("First packet needs more data, trying subsequent packets with shared context...")
+				for i := 1; i < len(packets); i++ {
+					// Reuse same metadata to accumulate fragments
+					err = sniff.QUICClientHello(context.Background(), &metadata, packets[i])
+					t.Logf("Packet %d sniff result: err=%v, domain=%s, sniffCtx=%v", i, err, metadata.Domain, metadata.SniffContext != nil)
+					if metadata.Domain != "" || (err != nil && !errors.Is(err, sniff.ErrNeedMoreData)) {
+						break
+					}
+				}
+			}
+
+			// Print hex dump for debugging
+			t.Logf("First packet hex:\n%s", hex.Dump(packets[0][:min(256, len(packets[0]))]))
+
+			// Log final results
+			t.Logf("Final: Protocol=%s, Domain=%s, Client=%s", metadata.Protocol, metadata.Domain, metadata.Client)
+
+			// Verify SNI extraction
+			if metadata.Domain == "" {
+				t.Errorf("Failed to extract SNI, expected: %s", testSNI)
+			} else {
+				require.Equal(t, testSNI, metadata.Domain, "SNI should match")
+			}
+
+			// Check client identification - quic-go should be identified as quic-go, not chromium
+			t.Logf("Client identified as: %s (expected: quic-go)", metadata.Client)
+		}
+
+	case <-time.After(5 * time.Second):
+		t.Fatal("Timeout waiting for QUIC packets")
+	}
+}

common/sniff/quic_test.go

@@ -19,7 +19,7 @@ func TestSniffQUICChromeNew(t *testing.T) {
 	var metadata adapter.InboundContext
 	err = sniff.QUICClientHello(context.Background(), &metadata, pkt)
 	require.Equal(t, metadata.Protocol, C.ProtocolQUIC)
-	require.Equal(t, metadata.Client, C.ClientChromium)
+	require.Empty(t, metadata.Client)
 	require.ErrorIs(t, err, sniff.ErrNeedMoreData)
 	pkt, err = hex.DecodeString("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")
 	require.NoError(t, err)
@@ -39,7 +39,7 @@ func TestSniffQUICChromium(t *testing.T) {
 	var metadata adapter.InboundContext
 	err = sniff.QUICClientHello(context.Background(), &metadata, pkt)
 	require.Equal(t, metadata.Protocol, C.ProtocolQUIC)
-	require.Equal(t, metadata.Client, C.ClientChromium)
+	require.Empty(t, metadata.Client)
 	require.ErrorIs(t, err, sniff.ErrNeedMoreData)
 	pkt, err = hex.DecodeString("c90000000108f40d654cc09b27f5000044d073eb38807026d4088455e650e7ccf750d01a72f15f9bfc8ff40d223499db1a485cff14dbd45b9be118172834dc35dca3cf62f61a1266f40b92faf3d28d67a466cfdca678ddced15cd606d31959cf441828467857b226d1a241847c82c57312cefe68ba5042d929919bcd4403b39e5699fe87dda05df1b3801e048edee792458e9b1a9b1d4039df05847bcee3be567494b5876e3bd4c3220fe9dfdb2c07d77410f907f744251ef15536cc03b267d3668d5b75bc1ad2fe735cd3bb73519dd9f1625a49e17ad27bdeccf706c83b5ea339a0a05dd0072f4a8f162bd29926b4997f05613c6e4b0270b0c02805ca0543f27c1ff8505a5750bdd33529ee73c491050a10c6903f53c1121dbe0380e84c007c8df74a1b02443ed80ba7766aef5549e618d4fd249844ee28565142005369869299e8c3035ecef3d799f6cada8549e75b4ce4cbf4c85ef071fd7ff067b1ca9b5968dc41d13d011f6d7843823bac97acb1eb8ee45883f0f254b5f9bd4c763b67e2d8c70a7618a0ef0de304cf597a485126e09f8b2fd795b394c0b4bc4cd2634c2057970da2c798c5e8af7aed4f76f5e25d04e3f8c9c5a5b150d17e0d4c74229898c69b8dc7b8bcc9d359eb441de75c68fbdebec62fb669dcccfb1aad03e3fa073adb2ccf7bb14cbaf99e307d2c903ee71a8f028102eb510caee7e7397512086a78d1f95635c7d06845b5a708652dc4e5cd61245aae5b3c05b84815d84d367bce9b9e3f6d6b90701ac3679233c14d5ce2a1eff26469c966266dc6284bdb95c9c6158934c413a872ce22101e4163e3293d236b301592ca4ccacc1fd4c37066e79c2d9857c8a2560dcf0b33b19163c4240c471b19907476e7e25c65f7eb37276594a0f6b4c33c340cc3284178f17ac5e34dbe7509db890e4ddfd0540fbf9deb32a0101d24fe58b26c5f81c627db9d6ae59d7a111a3d5d1f6109f4eec0d0234e6d73c73a44f50999462724b51ce0fd8283535d70d9e83872c79c59897407a0736741011ae5c64862eb0712f9e7b07aa1d5418ca3fde8626257c6fe418f3c5479055bb2b0ab4c25f649923fc2a41c79aaa7d0f3af6d8b8cf06f61f0230d09bbb60bb49b9e49cc5973748a6cf7ffdee7804d424f9423c63e7ff22f4bd24e4867636ef9fe8dd37f59941a8a47c27765caa8e875a30b62834f17c569227e5e6ed15d58e05d36e76332befad065a2cd4079e66d5af189b0337624c89b1560c3b1b0befd5c1f20e6de8e3d664b3ac06b3d154b488983e14aa93266f5f8b621d2a9bb7ccce509eb26e025c9c45f7cccc09ce85b3103af0c93ce9822f82ecb168ca3177829afb2ea0da2c380e7b1728add55a5d42632e2290363d4cbe432b67e13691648e1acfab22cf0d551eee857709b428bb78e27a45aff6eca301c02e4d13cf36cc2494fdd1aef8dede6e18febd79dca4c6964d09b91c25a08f0947c76ab5104de9404459c2edf5f4adb9dfd771be83656f77fbbafb1ad3281717066010be8778952495383c9f2cf0a38527228c662a35171c5981731f1af09bab842fe6c3162ad4152a4221f560eb6f9bea66b294ffbd3643da2fe34096da13c246505452540177a2a0a1a69106e5cfc279a4890fc3be2952f26be245f930e6c2d9e7e26ee960481e72b99594a1185b46b94b6436d00ba6c70ffe135d43907c92c6f1c09fb9453f103730714f5700fa4347f9715c774cb04a7218dacc66d9c2fade18b14e684aa7fc9ebda0a28")
 	require.NoError(t, err)

dns/client.go

@@ -353,68 +353,6 @@ func (c *Client) ClearCache() {
 	}
 }
 
-func (c *Client) LookupCache(domain string, strategy C.DomainStrategy) ([]netip.Addr, bool) {
-	if c.disableCache || c.independentCache {
-		return nil, false
-	}
-	if dns.IsFqdn(domain) {
-		domain = domain[:len(domain)-1]
-	}
-	dnsName := dns.Fqdn(domain)
-	if strategy == C.DomainStrategyIPv4Only {
-		addresses, err := c.questionCache(dns.Question{
-			Name:   dnsName,
-			Qtype:  dns.TypeA,
-			Qclass: dns.ClassINET,
-		}, nil)
-		if err != ErrNotCached {
-			return addresses, true
-		}
-	} else if strategy == C.DomainStrategyIPv6Only {
-		addresses, err := c.questionCache(dns.Question{
-			Name:   dnsName,
-			Qtype:  dns.TypeAAAA,
-			Qclass: dns.ClassINET,
-		}, nil)
-		if err != ErrNotCached {
-			return addresses, true
-		}
-	} else {
-		response4, _ := c.loadResponse(dns.Question{
-			Name:   dnsName,
-			Qtype:  dns.TypeA,
-			Qclass: dns.ClassINET,
-		}, nil)
-		if response4 == nil {
-			return nil, false
-		}
-		response6, _ := c.loadResponse(dns.Question{
-			Name:   dnsName,
-			Qtype:  dns.TypeAAAA,
-			Qclass: dns.ClassINET,
-		}, nil)
-		if response6 == nil {
-			return nil, false
-		}
-		return sortAddresses(MessageToAddresses(response4), MessageToAddresses(response6), strategy), true
-	}
-	return nil, false
-}
-
-func (c *Client) ExchangeCache(ctx context.Context, message *dns.Msg) (*dns.Msg, bool) {
-	if c.disableCache || c.independentCache || len(message.Question) != 1 {
-		return nil, false
-	}
-	question := message.Question[0]
-	response, ttl := c.loadResponse(question, nil)
-	if response == nil {
-		return nil, false
-	}
-	logCachedResponse(c.logger, ctx, response, ttl)
-	response.Id = message.Id
-	return response, true
-}
-
 func sortAddresses(response4 []netip.Addr, response6 []netip.Addr, strategy C.DomainStrategy) []netip.Addr {
 	if strategy == C.DomainStrategyPreferIPv6 {
 		return append(response6, response4...)

dns/router.go

@@ -214,97 +214,95 @@ func (r *Router) Exchange(ctx context.Context, message *mDNS.Msg, options adapte
 	}
 	r.logger.DebugContext(ctx, "exchange ", FormatQuestion(message.Question[0].String()))
 	var (
+		response  *mDNS.Msg
 		transport adapter.DNSTransport
 		err       error
 	)
-	response, cached := r.client.ExchangeCache(ctx, message)
-	if !cached {
-		var metadata *adapter.InboundContext
-		ctx, metadata = adapter.ExtendContext(ctx)
-		metadata.Destination = M.Socksaddr{}
-		metadata.QueryType = message.Question[0].Qtype
-		switch metadata.QueryType {
-		case mDNS.TypeA:
-			metadata.IPVersion = 4
-		case mDNS.TypeAAAA:
-			metadata.IPVersion = 6
-		}
-		metadata.Domain = FqdnToDomain(message.Question[0].Name)
-		if options.Transport != nil {
-			transport = options.Transport
-			if legacyTransport, isLegacy := transport.(adapter.LegacyDNSTransport); isLegacy {
-				if options.Strategy == C.DomainStrategyAsIS {
-					options.Strategy = legacyTransport.LegacyStrategy()
-				}
-				if !options.ClientSubnet.IsValid() {
-					options.ClientSubnet = legacyTransport.LegacyClientSubnet()
-				}
-			}
+	var metadata *adapter.InboundContext
+	ctx, metadata = adapter.ExtendContext(ctx)
+	metadata.Destination = M.Socksaddr{}
+	metadata.QueryType = message.Question[0].Qtype
+	switch metadata.QueryType {
+	case mDNS.TypeA:
+		metadata.IPVersion = 4
+	case mDNS.TypeAAAA:
+		metadata.IPVersion = 6
+	}
+	metadata.Domain = FqdnToDomain(message.Question[0].Name)
+	if options.Transport != nil {
+		transport = options.Transport
+		if legacyTransport, isLegacy := transport.(adapter.LegacyDNSTransport); isLegacy {
 			if options.Strategy == C.DomainStrategyAsIS {
-				options.Strategy = r.defaultDomainStrategy
+				options.Strategy = legacyTransport.LegacyStrategy()
 			}
-			response, err = r.client.Exchange(ctx, transport, message, options, nil)
-		} else {
-			var (
-				rule      adapter.DNSRule
-				ruleIndex int
-			)
-			ruleIndex = -1
-			for {
-				dnsCtx := adapter.OverrideContext(ctx)
-				dnsOptions := options
-				transport, rule, ruleIndex = r.matchDNS(ctx, true, ruleIndex, isAddressQuery(message), &dnsOptions)
-				if rule != nil {
-					switch action := rule.Action().(type) {
-					case *R.RuleActionReject:
-						switch action.Method {
-						case C.RuleActionRejectMethodDefault:
-							return &mDNS.Msg{
-								MsgHdr: mDNS.MsgHdr{
-									Id:       message.Id,
-									Rcode:    mDNS.RcodeRefused,
-									Response: true,
-								},
-								Question: []mDNS.Question{message.Question[0]},
-							}, nil
-						case C.RuleActionRejectMethodDrop:
-							return nil, tun.ErrDrop
-						}
-					case *R.RuleActionPredefined:
-						return action.Response(message), nil
-					}
-				}
-				var responseCheck func(responseAddrs []netip.Addr) bool
-				if rule != nil && rule.WithAddressLimit() {
-					responseCheck = func(responseAddrs []netip.Addr) bool {
-						metadata.DestinationAddresses = responseAddrs
-						return rule.MatchAddressLimit(metadata)
-					}
-				}
-				if dnsOptions.Strategy == C.DomainStrategyAsIS {
-					dnsOptions.Strategy = r.defaultDomainStrategy
-				}
-				response, err = r.client.Exchange(dnsCtx, transport, message, dnsOptions, responseCheck)
-				var rejected bool
-				if err != nil {
-					if errors.Is(err, ErrResponseRejectedCached) {
-						rejected = true
-						r.logger.DebugContext(ctx, E.Cause(err, "response rejected for ", FormatQuestion(message.Question[0].String())), " (cached)")
-					} else if errors.Is(err, ErrResponseRejected) {
-						rejected = true
-						r.logger.DebugContext(ctx, E.Cause(err, "response rejected for ", FormatQuestion(message.Question[0].String())))
-					} else if len(message.Question) > 0 {
-						r.logger.ErrorContext(ctx, E.Cause(err, "exchange failed for ", FormatQuestion(message.Question[0].String())))
-					} else {
-						r.logger.ErrorContext(ctx, E.Cause(err, "exchange failed for <empty query>"))
-					}
-				}
-				if responseCheck != nil && rejected {
-					continue
-				}
-				break
+			if !options.ClientSubnet.IsValid() {
+				options.ClientSubnet = legacyTransport.LegacyClientSubnet()
 			}
 		}
+		if options.Strategy == C.DomainStrategyAsIS {
+			options.Strategy = r.defaultDomainStrategy
+		}
+		response, err = r.client.Exchange(ctx, transport, message, options, nil)
+	} else {
+		var (
+			rule      adapter.DNSRule
+			ruleIndex int
+		)
+		ruleIndex = -1
+		for {
+			dnsCtx := adapter.OverrideContext(ctx)
+			dnsOptions := options
+			transport, rule, ruleIndex = r.matchDNS(ctx, true, ruleIndex, isAddressQuery(message), &dnsOptions)
+			if rule != nil {
+				switch action := rule.Action().(type) {
+				case *R.RuleActionReject:
+					switch action.Method {
+					case C.RuleActionRejectMethodDefault:
+						return &mDNS.Msg{
+							MsgHdr: mDNS.MsgHdr{
+								Id:       message.Id,
+								Rcode:    mDNS.RcodeRefused,
+								Response: true,
+							},
+							Question: []mDNS.Question{message.Question[0]},
+						}, nil
+					case C.RuleActionRejectMethodDrop:
+						return nil, tun.ErrDrop
+					}
+				case *R.RuleActionPredefined:
+					return action.Response(message), nil
+				}
+			}
+			var responseCheck func(responseAddrs []netip.Addr) bool
+			if rule != nil && rule.WithAddressLimit() {
+				responseCheck = func(responseAddrs []netip.Addr) bool {
+					metadata.DestinationAddresses = responseAddrs
+					return rule.MatchAddressLimit(metadata)
+				}
+			}
+			if dnsOptions.Strategy == C.DomainStrategyAsIS {
+				dnsOptions.Strategy = r.defaultDomainStrategy
+			}
+			response, err = r.client.Exchange(dnsCtx, transport, message, dnsOptions, responseCheck)
+			var rejected bool
+			if err != nil {
+				if errors.Is(err, ErrResponseRejectedCached) {
+					rejected = true
+					r.logger.DebugContext(ctx, E.Cause(err, "response rejected for ", FormatQuestion(message.Question[0].String())), " (cached)")
+				} else if errors.Is(err, ErrResponseRejected) {
+					rejected = true
+					r.logger.DebugContext(ctx, E.Cause(err, "response rejected for ", FormatQuestion(message.Question[0].String())))
+				} else if len(message.Question) > 0 {
+					r.logger.ErrorContext(ctx, E.Cause(err, "exchange failed for ", FormatQuestion(message.Question[0].String())))
+				} else {
+					r.logger.ErrorContext(ctx, E.Cause(err, "exchange failed for <empty query>"))
+				}
+			}
+			if responseCheck != nil && rejected {
+				continue
+			}
+			break
+		}
 	}
 	if err != nil {
 		return nil, err
@@ -327,7 +325,6 @@ func (r *Router) Exchange(ctx context.Context, message *mDNS.Msg, options adapte
 func (r *Router) Lookup(ctx context.Context, domain string, options adapter.DNSQueryOptions) ([]netip.Addr, error) {
 	var (
 		responseAddrs []netip.Addr
-		cached        bool
 		err           error
 	)
 	printResult := func() {
@@ -347,13 +344,6 @@ func (r *Router) Lookup(ctx context.Context, domain string, options adapter.DNSQ
 			err = E.Cause(err, "lookup ", domain)
 		}
 	}
-	responseAddrs, cached = r.client.LookupCache(domain, options.Strategy)
-	if cached {
-		if len(responseAddrs) == 0 {
-			return nil, E.New("lookup ", domain, ": empty result (cached)")
-		}
-		return responseAddrs, nil
-	}
 	r.logger.DebugContext(ctx, "lookup domain ", domain)
 	ctx, metadata := adapter.ExtendContext(ctx)
 	metadata.Destination = M.Socksaddr{}

dns/transport/dhcp/dhcp.go

@@ -243,6 +243,7 @@ func (t *Transport) fetchServersResponse(iface *control.Interface, packetConn ne
 	defer buffer.Release()
 
 	for {
+		buffer.Reset()
 		_, _, err := buffer.ReadPacketFrom(packetConn)
 		if err != nil {
 			if errors.Is(err, io.ErrShortBuffer) {

docs/changelog.md

@@ -2,6 +2,18 @@
 icon: material/alert-decagram
 ---
 
+#### 1.12.16
+
+* Fixes and improvements
+
+#### 1.12.15
+
+* Fixes and improvements
+
+#### 1.12.14
+
+* Fixes and improvements
+
 #### 1.12.13
 
 * Fix naive inbound

docs/configuration/inbound/shadowsocks.md

@@ -9,6 +9,7 @@
 
   "method": "2022-blake3-aes-128-gcm",
   "password": "8JCsPssfgS8tiRwiMlhARg==",
+  "managed": false,
   "multiplex": {}
 }
 ```
@@ -86,6 +87,10 @@ Both if empty.
 | 2022 methods  | `sing-box generate rand --base64 <Key Length>` |
 | other methods | any string                                     |
 
+#### managed
+
+Defaults to `false`. Enable this when the inbound is managed by the [SSM API](/configuration/service/ssm-api) for dynamic user.
+
 #### multiplex
 
 See [Multiplex](/configuration/shared/multiplex#inbound) for details.

docs/configuration/inbound/shadowsocks.zh.md

@@ -9,6 +9,7 @@
 
   "method": "2022-blake3-aes-128-gcm",
   "password": "8JCsPssfgS8tiRwiMlhARg==",
+  "managed": false,
   "multiplex": {}
 }
 ```
@@ -86,6 +87,10 @@ See [Listen Fields](/configuration/shared/listen/) for details.
 | 2022 methods  | `sing-box generate rand --base64 <密钥长度>` |
 | other methods | 任意字符串                                    |
 
+#### managed
+
+默认为 `false`。当该入站需要由 [SSM API](/zh/configuration/service/ssm-api) 管理用户时必须启用此字段。
+
 #### multiplex
 
 参阅 [多路复用](/zh/configuration/shared/multiplex#inbound)。

go.mod

@@ -27,9 +27,9 @@ require (
 	github.com/sagernet/gomobile v0.1.8
 	github.com/sagernet/gvisor v0.0.0-20250325023245-7a9c0f5725fb
 	github.com/sagernet/quic-go v0.52.0-sing-box-mod.3
-	github.com/sagernet/sing v0.7.13
+	github.com/sagernet/sing v0.7.14
 	github.com/sagernet/sing-mux v0.3.3
-	github.com/sagernet/sing-quic v0.5.2-0.20250909083218-00a55617c0fb
+	github.com/sagernet/sing-quic v0.5.2
 	github.com/sagernet/sing-shadowsocks v0.2.8
 	github.com/sagernet/sing-shadowsocks2 v0.2.1
 	github.com/sagernet/sing-shadowtls v0.2.1-0.20250503051639-fcd445d33c11

go.sum

@@ -167,12 +167,12 @@ github.com/sagernet/nftables v0.3.0-beta.4/go.mod h1:OQXAjvjNGGFxaTgVCSTRIhYB5/l
 github.com/sagernet/quic-go v0.52.0-sing-box-mod.3 h1:ySqffGm82rPqI1TUPqmtHIYd12pfEGScygnOxjTL56w=
 github.com/sagernet/quic-go v0.52.0-sing-box-mod.3/go.mod h1:OV+V5kEBb8kJS7k29MzDu6oj9GyMc7HA07sE1tedxz4=
 github.com/sagernet/sing v0.6.9/go.mod h1:ARkL0gM13/Iv5VCZmci/NuoOlePoIsW0m7BWfln/Hak=
-github.com/sagernet/sing v0.7.13 h1:XNYgd8e3cxMULs/LLJspdn/deHrnPWyrrglNHeCUAYM=
-github.com/sagernet/sing v0.7.13/go.mod h1:ARkL0gM13/Iv5VCZmci/NuoOlePoIsW0m7BWfln/Hak=
+github.com/sagernet/sing v0.7.14 h1:5QQRDCUvYNOMyVp3LuK/hYEBAIv0VsbD3x/l9zH467s=
+github.com/sagernet/sing v0.7.14/go.mod h1:ARkL0gM13/Iv5VCZmci/NuoOlePoIsW0m7BWfln/Hak=
 github.com/sagernet/sing-mux v0.3.3 h1:YFgt9plMWzH994BMZLmyKL37PdIVaIilwP0Jg+EcLfw=
 github.com/sagernet/sing-mux v0.3.3/go.mod h1:pht8iFY4c9Xltj7rhVd208npkNaeCxzyXCgulDPLUDA=
-github.com/sagernet/sing-quic v0.5.2-0.20250909083218-00a55617c0fb h1:5Wx3XeTiKrrrcrAky7Hc1bO3CGxrvho2Vu5b/adlEIM=
-github.com/sagernet/sing-quic v0.5.2-0.20250909083218-00a55617c0fb/go.mod h1:evP1e++ZG8TJHVV5HudXV4vWeYzGfCdF4HwSJZcdqkI=
+github.com/sagernet/sing-quic v0.5.2 h1:I3vlfRImhr0uLwRS3b3ib70RMG9FcXtOKKUDz3eKRWc=
+github.com/sagernet/sing-quic v0.5.2/go.mod h1:evP1e++ZG8TJHVV5HudXV4vWeYzGfCdF4HwSJZcdqkI=
 github.com/sagernet/sing-shadowsocks v0.2.8 h1:PURj5PRoAkqeHh2ZW205RWzN9E9RtKCVCzByXruQWfE=
 github.com/sagernet/sing-shadowsocks v0.2.8/go.mod h1:lo7TWEMDcN5/h5B8S0ew+r78ZODn6SwVaFhvB6H+PTI=
 github.com/sagernet/sing-shadowsocks2 v0.2.1 h1:dWV9OXCeFPuYGHb6IRqlSptVnSzOelnqqs2gQ2/Qioo=

option/options.go

@@ -5,6 +5,7 @@ import (
 	"context"
 
 	E "github.com/sagernet/sing/common/exceptions"
+	F "github.com/sagernet/sing/common/format"
 	"github.com/sagernet/sing/common/json"
 )
 
@@ -60,37 +61,40 @@ func checkOptions(options *Options) error {
 
 func checkInbounds(inbounds []Inbound) error {
 	seen := make(map[string]bool)
-	for _, inbound := range inbounds {
-		if inbound.Tag == "" {
-			continue
+	for i, inbound := range inbounds {
+		tag := inbound.Tag
+		if tag == "" {
+			tag = F.ToString(i)
 		}
-		if seen[inbound.Tag] {
-			return E.New("duplicate inbound tag: ", inbound.Tag)
+		if seen[tag] {
+			return E.New("duplicate inbound tag: ", tag)
 		}
-		seen[inbound.Tag] = true
+		seen[tag] = true
 	}
 	return nil
 }
 
 func checkOutbounds(outbounds []Outbound, endpoints []Endpoint) error {
 	seen := make(map[string]bool)
-	for _, outbound := range outbounds {
-		if outbound.Tag == "" {
-			continue
+	for i, outbound := range outbounds {
+		tag := outbound.Tag
+		if tag == "" {
+			tag = F.ToString(i)
 		}
-		if seen[outbound.Tag] {
-			return E.New("duplicate outbound/endpoint tag: ", outbound.Tag)
+		if seen[tag] {
+			return E.New("duplicate outbound/endpoint tag: ", tag)
 		}
-		seen[outbound.Tag] = true
+		seen[tag] = true
 	}
-	for _, endpoint := range endpoints {
-		if endpoint.Tag == "" {
-			continue
+	for i, endpoint := range endpoints {
+		tag := endpoint.Tag
+		if tag == "" {
+			tag = F.ToString(i)
 		}
-		if seen[endpoint.Tag] {
-			return E.New("duplicate outbound/endpoint tag: ", endpoint.Tag)
+		if seen[tag] {
+			return E.New("duplicate outbound/endpoint tag: ", tag)
 		}
-		seen[endpoint.Tag] = true
+		seen[tag] = true
 	}
 	return nil
 }

protocol/dns/handle.go

@@ -46,7 +46,8 @@ func HandleStreamDNSRequest(ctx context.Context, router adapter.DNSRouter, conn
 			conn.Close()
 			return err
 		}
-		responseBuffer := buf.NewPacket()
+		responseLength := response.Len()
+		responseBuffer := buf.NewSize(3 + responseLength)
 		defer responseBuffer.Release()
 		responseBuffer.Resize(2, 0)
 		n, err := response.PackBuffer(responseBuffer.FreeBytes())

protocol/tailscale/endpoint.go

@@ -38,6 +38,7 @@ import (
 	"github.com/sagernet/sing/common/logger"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/common/ntp"
 	"github.com/sagernet/sing/service"
 	"github.com/sagernet/sing/service/filemanager"
 	"github.com/sagernet/tailscale/ipn"
@@ -158,6 +159,7 @@ func NewEndpoint(ctx context.Context, router adapter.Router, logger log.ContextL
 				},
 				TLSClientConfig: &tls.Config{
 					RootCAs: adapter.RootPoolFromContext(ctx),
+					Time:    ntp.TimeFuncFromContext(ctx),
 				},
 			},
 		},
@@ -339,26 +341,42 @@ func (t *Endpoint) DialContext(ctx context.Context, network string, destination
 		}
 		return N.DialSerial(ctx, t, network, destination, destinationAddresses)
 	}
-	addr := tcpip.FullAddress{
+	addr4, addr6 := t.server.TailscaleIPs()
+	remoteAddr := tcpip.FullAddress{
 		NIC:  1,
 		Port: destination.Port,
 		Addr: addressFromAddr(destination.Addr),
 	}
+	var localAddr tcpip.FullAddress
 	var networkProtocol tcpip.NetworkProtocolNumber
 	if destination.IsIPv4() {
+		if !addr4.IsValid() {
+			return nil, E.New("missing Tailscale IPv4 address")
+		}
 		networkProtocol = header.IPv4ProtocolNumber
+		localAddr = tcpip.FullAddress{
+			NIC:  1,
+			Addr: addressFromAddr(addr4),
+		}
 	} else {
+		if !addr6.IsValid() {
+			return nil, E.New("missing Tailscale IPv6 address")
+		}
 		networkProtocol = header.IPv6ProtocolNumber
+		localAddr = tcpip.FullAddress{
+			NIC:  1,
+			Addr: addressFromAddr(addr6),
+		}
 	}
 	switch N.NetworkName(network) {
 	case N.NetworkTCP:
-		tcpConn, err := gonet.DialContextTCP(ctx, t.stack, addr, networkProtocol)
+		tcpConn, err := gonet.DialTCPWithBind(ctx, t.stack, localAddr, remoteAddr, networkProtocol)
 		if err != nil {
 			return nil, err
 		}
 		return tcpConn, nil
 	case N.NetworkUDP:
-		udpConn, err := gonet.DialUDP(t.stack, nil, &addr, networkProtocol)
+		udpConn, err := gonet.DialUDP(t.stack, &localAddr, &remoteAddr, networkProtocol)
 		if err != nil {
 			return nil, err
 		}

service/derp/service.go

@@ -3,6 +3,7 @@ package derp
 import (
 	"bufio"
 	"context"
+	stdTLS "crypto/tls"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -31,6 +32,7 @@ import (
 	"github.com/sagernet/sing/common/logger"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/common/ntp"
 	aTLS "github.com/sagernet/sing/common/tls"
 	"github.com/sagernet/sing/service"
 	"github.com/sagernet/sing/service/filemanager"
@@ -159,6 +161,10 @@ func (d *Service) Start(stage adapter.StartStage) error {
 				httpClients = append(httpClients, &http.Client{
 					Transport: &http.Transport{
 						ForceAttemptHTTP2: true,
+						TLSClientConfig: &stdTLS.Config{
+							RootCAs: adapter.RootPoolFromContext(d.ctx),
+							Time:    ntp.TimeFuncFromContext(d.ctx),
+						},
 						DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
 							return verifyDialer.DialContext(ctx, network, M.ParseSocksaddr(addr))
 						},

transport/v2rayquic/stream.go

@@ -14,11 +14,13 @@ type StreamWrapper struct {
 
 func (s *StreamWrapper) Read(p []byte) (n int, err error) {
 	n, err = s.Stream.Read(p)
+	//nolint:staticcheck
 	return n, baderror.WrapQUIC(err)
 }
 
 func (s *StreamWrapper) Write(p []byte) (n int, err error) {
 	n, err = s.Stream.Write(p)
+	//nolint:staticcheck
 	return n, baderror.WrapQUIC(err)
 }