v1.4.0

Co-authored-by: JimhHan <50871214+JimhHan@users.noreply.github.com>

.github/build/friendly-filenames.json

@@ -1,5 +1,5 @@
 {
-  "android-arm64": { "friendlyName": "android-arm64-v8a"},
+  "android-arm64": { "friendlyName": "android-arm64-v8a" },
   "darwin-amd64": { "friendlyName": "macos-64" },
   "darwin-arm64": { "friendlyName": "macos-arm64-v8a" },
   "dragonfly-amd64": { "friendlyName": "dragonfly-64" },
@@ -15,19 +15,19 @@
   "linux-arm7": { "friendlyName": "linux-arm32-v7a" },
   "linux-mips64le": { "friendlyName": "linux-mips64le" },
   "linux-mips64": { "friendlyName": "linux-mips64" },
-  "linux-mipsle": { "friendlyName": "linux-mips32le" },
   "linux-mipslesoftfloat": { "friendlyName": "linux-mips32le-softfloat" },
-  "linux-mips": { "friendlyName": "linux-mips32" },
+  "linux-mipsle": { "friendlyName": "linux-mips32le" },
   "linux-mipssoftfloat": { "friendlyName": "linux-mips32-softfloat" },
-  "linux-riscv64": { "friendlyName": "linux-riscv64" },
+  "linux-mips": { "friendlyName": "linux-mips32" },
+  "linux-ppc64le": { "friendlyName": "linux-ppc64le" },
   "linux-ppc64": { "friendlyName": "linux-ppc64" },
-  "linux-ppc64le": { "friendlyName": "linux-rppc64le" },
+  "linux-riscv64": { "friendlyName": "linux-riscv64" },
   "linux-s390x": { "friendlyName": "linux-s390x" },
   "openbsd-386": { "friendlyName": "openbsd-32" },
   "openbsd-amd64": { "friendlyName": "openbsd-64" },
   "openbsd-arm64": { "friendlyName": "openbsd-arm64-v8a" },
   "openbsd-arm7": { "friendlyName": "openbsd-arm32-v7a" },
-  "windows-amd64": { "friendlyName": "windows-64" },
   "windows-386": { "friendlyName": "windows-32" },
+  "windows-amd64": { "friendlyName": "windows-64" },
   "windows-arm7": { "friendlyName": "windows-arm32-v7a" }
 }

.github/workflows/release.yml

@@ -99,8 +99,8 @@ jobs:
             goarm: 7
           # END OPENBSD ARM
       fail-fast: false
-    #配置编译环境
-    runs-on: ubuntu-20.04
+
+    runs-on: ubuntu-latest
     env:
       GOOS: ${{ matrix.goos }}
       GOARCH: ${{ matrix.goarch }}
@@ -173,16 +173,8 @@ jobs:
         shell: bash
         run: |
           pushd build_assets || exit 1
-          touch -mt 202101010000 *
+          touch -mt $(date +%Y01010000) *
           zip -9vr ../Xray-$ASSET_NAME.zip .
-          for CORE in $(ls xray*)
-          do
-            COREDGST=$CORE.dgst
-            for METHOD in {"md5","sha1","sha256","sha512"}
-            do
-              openssl dgst -$METHOD $CORE | sed 's/([^)]*)//g' >>$COREDGST
-            done
-          done
           popd || exit 1
           FILE=./Xray-$ASSET_NAME.zip
           DGST=$FILE.dgst

app/dispatcher/default.go

@@ -15,6 +15,7 @@ import (
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/common/session"
 	"github.com/xtls/xray-core/core"
+	"github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/outbound"
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/features/routing"
@@ -175,17 +176,28 @@ func (d *DefaultDispatcher) getLink(ctx context.Context) (*transport.Link, *tran
 	return inboundLink, outboundLink
 }
 
-func shouldOverride(result SniffResult, request session.SniffingRequest) bool {
+func shouldOverride(ctx context.Context, result SniffResult, request session.SniffingRequest, destination net.Destination) bool {
 	domain := result.Domain()
 	for _, d := range request.ExcludeForDomain {
 		if domain == d {
 			return false
 		}
 	}
-
-	protocol := result.Protocol()
+	var fakeDNSEngine dns.FakeDNSEngine
+	core.RequireFeatures(ctx, func(fdns dns.FakeDNSEngine) {
+		fakeDNSEngine = fdns
+	})
+	protocolString := result.Protocol()
+	if resComp, ok := result.(SnifferResultComposite); ok {
+		protocolString = resComp.ProtocolForDomainResult()
+	}
 	for _, p := range request.OverrideDestinationForProtocol {
-		if strings.HasPrefix(protocol, p) {
+		if strings.HasPrefix(protocolString, p) {
+			return true
+		}
+		if fakeDNSEngine != nil && protocolString != "bittorrent" && p == "fakedns" &&
+			fakeDNSEngine.GetFakeIPRange().Contains(destination.Address.IP()) {
+			newError("Using sniffer ", protocolString, " since the fake DNS missed").WriteToLog(session.ExportIDToError(ctx))
 			return true
 		}
 	}
@@ -210,19 +222,33 @@ func (d *DefaultDispatcher) Dispatch(ctx context.Context, destination net.Destin
 		ctx = session.ContextWithContent(ctx, content)
 	}
 	sniffingRequest := content.SniffingRequest
-	if destination.Network != net.Network_TCP || !sniffingRequest.Enabled {
+	switch {
+	case !sniffingRequest.Enabled:
 		go d.routedDispatch(ctx, outbound, destination)
-	} else {
+	case destination.Network != net.Network_TCP:
+		// Only metadata sniff will be used for non tcp connection
+		result, err := sniffer(ctx, nil, true)
+		if err == nil {
+			content.Protocol = result.Protocol()
+			if shouldOverride(ctx, result, sniffingRequest, destination) {
+				domain := result.Domain()
+				newError("sniffed domain: ", domain).WriteToLog(session.ExportIDToError(ctx))
+				destination.Address = net.ParseAddress(domain)
+				ob.Target = destination
+			}
+		}
+		go d.routedDispatch(ctx, outbound, destination)
+	default:
 		go func() {
 			cReader := &cachedReader{
 				reader: outbound.Reader.(*pipe.Reader),
 			}
 			outbound.Reader = cReader
-			result, err := sniffer(ctx, cReader)
+			result, err := sniffer(ctx, cReader, sniffingRequest.MetadataOnly)
 			if err == nil {
 				content.Protocol = result.Protocol()
 			}
-			if err == nil && shouldOverride(result, sniffingRequest) {
+			if err == nil && shouldOverride(ctx, result, sniffingRequest, destination) {
 				domain := result.Domain()
 				newError("sniffed domain: ", domain).WriteToLog(session.ExportIDToError(ctx))
 				destination.Address = net.ParseAddress(domain)
@@ -234,34 +260,50 @@ func (d *DefaultDispatcher) Dispatch(ctx context.Context, destination net.Destin
 	return inbound, nil
 }
 
-func sniffer(ctx context.Context, cReader *cachedReader) (SniffResult, error) {
+func sniffer(ctx context.Context, cReader *cachedReader, metadataOnly bool) (SniffResult, error) {
 	payload := buf.New()
 	defer payload.Release()
 
-	sniffer := NewSniffer()
-	totalAttempt := 0
-	for {
-		select {
-		case <-ctx.Done():
-			return nil, ctx.Err()
-		default:
-			totalAttempt++
-			if totalAttempt > 2 {
-				return nil, errSniffingTimeout
-			}
+	sniffer := NewSniffer(ctx)
 
-			cReader.Cache(payload)
-			if !payload.IsEmpty() {
-				result, err := sniffer.Sniff(payload.Bytes())
-				if err != common.ErrNoClue {
-					return result, err
+	metaresult, metadataErr := sniffer.SniffMetadata(ctx)
+
+	if metadataOnly {
+		return metaresult, metadataErr
+	}
+
+	contentResult, contentErr := func() (SniffResult, error) {
+		totalAttempt := 0
+		for {
+			select {
+			case <-ctx.Done():
+				return nil, ctx.Err()
+			default:
+				totalAttempt++
+				if totalAttempt > 2 {
+					return nil, errSniffingTimeout
+				}
+
+				cReader.Cache(payload)
+				if !payload.IsEmpty() {
+					result, err := sniffer.Sniff(ctx, payload.Bytes())
+					if err != common.ErrNoClue {
+						return result, err
+					}
+				}
+				if payload.IsFull() {
+					return nil, errUnknownContent
 				}
 			}
-			if payload.IsFull() {
-				return nil, errUnknownContent
-			}
 		}
+	}()
+	if contentErr != nil && metadataErr == nil {
+		return metaresult, nil
 	}
+	if contentErr == nil && metadataErr == nil {
+		return CompositeResult(metaresult, contentResult), nil
+	}
+	return contentResult, contentErr
 }
 
 func (d *DefaultDispatcher) routedDispatch(ctx context.Context, link *transport.Link, destination net.Destination) {

app/dispatcher/fakednssniffer.go

@@ -0,0 +1,49 @@
+package dispatcher
+
+import (
+	"context"
+
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/core"
+	"github.com/xtls/xray-core/features/dns"
+)
+
+// newFakeDNSSniffer Create a Fake DNS metadata sniffer
+func newFakeDNSSniffer(ctx context.Context) (protocolSnifferWithMetadata, error) {
+	var fakeDNSEngine dns.FakeDNSEngine
+	err := core.RequireFeatures(ctx, func(fdns dns.FakeDNSEngine) {
+		fakeDNSEngine = fdns
+	})
+	if err != nil {
+		return protocolSnifferWithMetadata{}, err
+	}
+	if fakeDNSEngine == nil {
+		errNotInit := newError("FakeDNSEngine is not initialized, but such a sniffer is used").AtError()
+		return protocolSnifferWithMetadata{}, errNotInit
+	}
+	return protocolSnifferWithMetadata{protocolSniffer: func(ctx context.Context, bytes []byte) (SniffResult, error) {
+		Target := session.OutboundFromContext(ctx).Target
+		if Target.Network == net.Network_TCP || Target.Network == net.Network_UDP {
+			domainFromFakeDNS := fakeDNSEngine.GetDomainFromFakeDNS(Target.Address)
+			if domainFromFakeDNS != "" {
+				newError("fake dns got domain: ", domainFromFakeDNS, " for ip: ", Target.Address.String()).WriteToLog(session.ExportIDToError(ctx))
+				return &fakeDNSSniffResult{domainName: domainFromFakeDNS}, nil
+			}
+		}
+		return nil, common.ErrNoClue
+	}, metadataSniffer: true}, nil
+}
+
+type fakeDNSSniffResult struct {
+	domainName string
+}
+
+func (fakeDNSSniffResult) Protocol() string {
+	return "fakedns"
+}
+
+func (f fakeDNSSniffResult) Domain() string {
+	return f.domainName
+}

app/dispatcher/sniffer.go

@@ -1,6 +1,8 @@
 package dispatcher
 
 import (
+	"context"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/protocol/bittorrent"
 	"github.com/xtls/xray-core/common/protocol/http"
@@ -12,30 +14,46 @@ type SniffResult interface {
 	Domain() string
 }
 
-type protocolSniffer func([]byte) (SniffResult, error)
+type protocolSniffer func(context.Context, []byte) (SniffResult, error)
 
-type Sniffer struct {
-	sniffer []protocolSniffer
+type protocolSnifferWithMetadata struct {
+	protocolSniffer protocolSniffer
+	// A Metadata sniffer will be invoked on connection establishment only, with nil body,
+	// for both TCP and UDP connections
+	// It will not be shown as a traffic type for routing unless there is no other successful sniffing.
+	metadataSniffer bool
 }
 
-func NewSniffer() *Sniffer {
-	return &Sniffer{
-		sniffer: []protocolSniffer{
-			func(b []byte) (SniffResult, error) { return http.SniffHTTP(b) },
-			func(b []byte) (SniffResult, error) { return tls.SniffTLS(b) },
-			func(b []byte) (SniffResult, error) { return bittorrent.SniffBittorrent(b) },
+type Sniffer struct {
+	sniffer []protocolSnifferWithMetadata
+}
+
+func NewSniffer(ctx context.Context) *Sniffer {
+	ret := &Sniffer{
+		sniffer: []protocolSnifferWithMetadata{
+			{func(c context.Context, b []byte) (SniffResult, error) { return http.SniffHTTP(b) }, false},
+			{func(c context.Context, b []byte) (SniffResult, error) { return tls.SniffTLS(b) }, false},
+			{func(c context.Context, b []byte) (SniffResult, error) { return bittorrent.SniffBittorrent(b) }, false},
 		},
 	}
+	if sniffer, err := newFakeDNSSniffer(ctx); err == nil {
+		ret.sniffer = append(ret.sniffer, sniffer)
+	}
+	return ret
 }
 
 var errUnknownContent = newError("unknown content")
 
-func (s *Sniffer) Sniff(payload []byte) (SniffResult, error) {
-	var pendingSniffer []protocolSniffer
-	for _, s := range s.sniffer {
-		result, err := s(payload)
+func (s *Sniffer) Sniff(c context.Context, payload []byte) (SniffResult, error) {
+	var pendingSniffer []protocolSnifferWithMetadata
+	for _, si := range s.sniffer {
+		s := si.protocolSniffer
+		if si.metadataSniffer {
+			continue
+		}
+		result, err := s(c, payload)
 		if err == common.ErrNoClue {
-			pendingSniffer = append(pendingSniffer, s)
+			pendingSniffer = append(pendingSniffer, si)
 			continue
 		}
 
@@ -51,3 +69,55 @@ func (s *Sniffer) Sniff(payload []byte) (SniffResult, error) {
 
 	return nil, errUnknownContent
 }
+
+func (s *Sniffer) SniffMetadata(c context.Context) (SniffResult, error) {
+	var pendingSniffer []protocolSnifferWithMetadata
+	for _, si := range s.sniffer {
+		s := si.protocolSniffer
+		if !si.metadataSniffer {
+			pendingSniffer = append(pendingSniffer, si)
+			continue
+		}
+		result, err := s(c, nil)
+		if err == common.ErrNoClue {
+			pendingSniffer = append(pendingSniffer, si)
+			continue
+		}
+
+		if err == nil && result != nil {
+			return result, nil
+		}
+	}
+
+	if len(pendingSniffer) > 0 {
+		s.sniffer = pendingSniffer
+		return nil, common.ErrNoClue
+	}
+
+	return nil, errUnknownContent
+}
+
+func CompositeResult(domainResult SniffResult, protocolResult SniffResult) SniffResult {
+	return &compositeResult{domainResult: domainResult, protocolResult: protocolResult}
+}
+
+type compositeResult struct {
+	domainResult   SniffResult
+	protocolResult SniffResult
+}
+
+func (c compositeResult) Protocol() string {
+	return c.protocolResult.Protocol()
+}
+
+func (c compositeResult) Domain() string {
+	return c.domainResult.Domain()
+}
+
+func (c compositeResult) ProtocolForDomainResult() string {
+	return c.domainResult.Protocol()
+}
+
+type SnifferResultComposite interface {
+	ProtocolForDomainResult() string
+}

app/dns/config.proto

@@ -68,4 +68,6 @@ message Config {
 
   // Tag is the inbound tag of DNS client.
   string tag = 6;
+
+  reserved 7;
 }

app/dns/dnscommon.go

@@ -2,6 +2,7 @@ package dns
 
 import (
 	"encoding/binary"
+	"strings"
 	"time"
 
 	"github.com/xtls/xray-core/common"
@@ -13,7 +14,7 @@ import (
 
 // Fqdn normalize domain make sure it ends with '.'
 func Fqdn(domain string) string {
-	if len(domain) > 0 && domain[len(domain)-1] == '.' {
+	if len(domain) > 0 && strings.HasSuffix(domain, ".") {
 		return domain
 	}
 	return domain + "."
@@ -112,7 +113,7 @@ func genEDNS0Options(clientIP net.IP) *dnsmessage.Resource {
 	return opt
 }
 
-func buildReqMsgs(domain string, option IPOption, reqIDGen func() uint16, reqOpts *dnsmessage.Resource) []*dnsRequest {
+func buildReqMsgs(domain string, option dns_feature.IPOption, reqIDGen func() uint16, reqOpts *dnsmessage.Resource) []*dnsRequest {
 	qA := dnsmessage.Question{
 		Name:  dnsmessage.MustNewName(domain),
 		Type:  dnsmessage.TypeA,

app/dns/dnscommon_test.go

@@ -9,6 +9,7 @@ import (
 	"github.com/miekg/dns"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
+	dns_feature "github.com/xtls/xray-core/features/dns"
 	"golang.org/x/net/dns/dnsmessage"
 )
 
@@ -92,7 +93,7 @@ func Test_buildReqMsgs(t *testing.T) {
 	}
 	type args struct {
 		domain  string
-		option  IPOption
+		option  dns_feature.IPOption
 		reqOpts *dnsmessage.Resource
 	}
 	tests := []struct {
@@ -100,10 +101,26 @@ func Test_buildReqMsgs(t *testing.T) {
 		args args
 		want int
 	}{
-		{"dual stack", args{"test.com", IPOption{true, true}, nil}, 2},
-		{"ipv4 only", args{"test.com", IPOption{true, false}, nil}, 1},
-		{"ipv6 only", args{"test.com", IPOption{false, true}, nil}, 1},
-		{"none/error", args{"test.com", IPOption{false, false}, nil}, 0},
+		{"dual stack", args{"test.com", dns_feature.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		}, nil}, 2},
+		{"ipv4 only", args{"test.com", dns_feature.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: false,
+			FakeEnable: false,
+		}, nil}, 1},
+		{"ipv6 only", args{"test.com", dns_feature.IPOption{
+			IPv4Enable: false,
+			IPv6Enable: true,
+			FakeEnable: false,
+		}, nil}, 1},
+		{"none/error", args{"test.com", dns_feature.IPOption{
+			IPv4Enable: false,
+			IPv6Enable: false,
+			FakeEnable: false,
+		}, nil}, 0},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {

app/dns/dohdns.go

@@ -13,6 +13,7 @@ import (
 	"time"
 
 	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/log"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/net/cnc"
 	"github.com/xtls/xray-core/common/protocol/dns"
@@ -47,6 +48,56 @@ func NewDoHNameServer(url *url.URL, dispatcher routing.Dispatcher, clientIP net.
 	s := baseDOHNameServer(url, "DOH", clientIP)
 
 	s.dispatcher = dispatcher
+	tr := &http.Transport{
+		MaxIdleConns:        30,
+		IdleConnTimeout:     90 * time.Second,
+		TLSHandshakeTimeout: 30 * time.Second,
+		ForceAttemptHTTP2:   true,
+		DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
+			dispatcherCtx := context.Background()
+
+			dest, err := net.ParseDestination(network + ":" + addr)
+			if err != nil {
+				return nil, err
+			}
+
+			dispatcherCtx = session.ContextWithContent(dispatcherCtx, &session.Content{Protocol: "tls"})
+			dispatcherCtx = log.ContextWithAccessMessage(dispatcherCtx, &log.AccessMessage{
+				From:   "DoH",
+				To:     s.dohURL,
+				Status: log.AccessAccepted,
+				Reason: "",
+			})
+
+			link, err := s.dispatcher.Dispatch(dispatcherCtx, dest)
+			select {
+			case <-ctx.Done():
+				return nil, ctx.Err()
+			default:
+
+			}
+			if err != nil {
+				return nil, err
+			}
+
+			cc := common.ChainedClosable{}
+			if cw, ok := link.Writer.(common.Closable); ok {
+				cc = append(cc, cw)
+			}
+			if cr, ok := link.Reader.(common.Closable); ok {
+				cc = append(cc, cr)
+			}
+			return cnc.NewConnection(
+				cnc.ConnectionInputMulti(link.Writer),
+				cnc.ConnectionOutputMulti(link.Reader),
+				cnc.ConnectionOnClose(cc),
+			), nil
+		},
+	}
+	s.httpClient = &http.Client{
+		Timeout:   time.Second * 180,
+		Transport: tr,
+	}
 
 	return s, nil
 }
@@ -64,6 +115,12 @@ func NewDoHLocalNameServer(url *url.URL, clientIP net.IP) *DoHNameServer {
 				return nil, err
 			}
 			conn, err := internet.DialSystem(ctx, dest, nil)
+			log.Record(&log.AccessMessage{
+				From:   "DoH",
+				To:     s.dohURL,
+				Status: log.AccessAccepted,
+				Detour: "local",
+			})
 			if err != nil {
 				return nil, err
 			}
@@ -177,7 +234,7 @@ func (s *DoHNameServer) newReqID() uint16 {
 	return uint16(atomic.AddUint32(&s.reqID, 1))
 }
 
-func (s *DoHNameServer) sendQuery(ctx context.Context, domain string, option IPOption) {
+func (s *DoHNameServer) sendQuery(ctx context.Context, domain string, option dns_feature.IPOption) {
 	newError(s.name, " querying: ", domain).AtInfo().WriteToLog(session.ExportIDToError(ctx))
 
 	if s.name+"." == "DOH//"+domain {
@@ -249,41 +306,6 @@ func (s *DoHNameServer) dohHTTPSContext(ctx context.Context, b []byte) ([]byte,
 
 	hc := s.httpClient
 
-	// Dispatched connection will be closed (interrupted) after each request
-	// This makes DOH inefficient without a keep-alived connection
-	// See: core/app/proxyman/outbound/handler.go:113
-	// Using mux (https request wrapped in a stream layer) improves the situation.
-	// Recommend to use NewDoHLocalNameServer (DOHL:) if xray instance is running on
-	//  a normal network eg. the server side of xray
-
-	if s.dispatcher != nil {
-		tr := &http.Transport{
-			MaxIdleConns:        30,
-			IdleConnTimeout:     90 * time.Second,
-			TLSHandshakeTimeout: 30 * time.Second,
-			ForceAttemptHTTP2:   true,
-			DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
-				dest, err := net.ParseDestination(network + ":" + addr)
-				if err != nil {
-					return nil, err
-				}
-
-				link, err := s.dispatcher.Dispatch(ctx, dest)
-				if err != nil {
-					return nil, err
-				}
-				return cnc.NewConnection(
-					cnc.ConnectionInputMulti(link.Writer),
-					cnc.ConnectionOutputMulti(link.Reader),
-				), nil
-			},
-		}
-		hc = &http.Client{
-			Timeout:   time.Second * 180,
-			Transport: tr,
-		}
-	}
-
 	resp, err := hc.Do(req.WithContext(ctx))
 	if err != nil {
 		return nil, err
@@ -298,7 +320,7 @@ func (s *DoHNameServer) dohHTTPSContext(ctx context.Context, b []byte) ([]byte,
 	return ioutil.ReadAll(resp.Body)
 }
 
-func (s *DoHNameServer) findIPsForDomain(domain string, option IPOption) ([]net.IP, error) {
+func (s *DoHNameServer) findIPsForDomain(domain string, option dns_feature.IPOption) ([]net.IP, error) {
 	s.RLock()
 	record, found := s.ips[domain]
 	s.RUnlock()
@@ -341,12 +363,13 @@ func (s *DoHNameServer) findIPsForDomain(domain string, option IPOption) ([]net.
 }
 
 // QueryIP is called from dns.Server->queryIPTimeout
-func (s *DoHNameServer) QueryIP(ctx context.Context, domain string, option IPOption) ([]net.IP, error) {
+func (s *DoHNameServer) QueryIP(ctx context.Context, domain string, option dns_feature.IPOption) ([]net.IP, error) { // nolint: dupl
 	fqdn := Fqdn(domain)
 
 	ips, err := s.findIPsForDomain(fqdn, option)
 	if err != errRecordNotFound {
 		newError(s.name, " cache HIT ", domain, " -> ", ips).Base(err).AtDebug().WriteToLog()
+		log.Record(&log.DNSLog{s.name, domain, ips, log.DNSCacheHit, 0, err})
 		return ips, err
 	}
 
@@ -377,10 +400,12 @@ func (s *DoHNameServer) QueryIP(ctx context.Context, domain string, option IPOpt
 		close(done)
 	}()
 	s.sendQuery(ctx, fqdn, option)
+	start := time.Now()
 
 	for {
 		ips, err := s.findIPsForDomain(fqdn, option)
 		if err != errRecordNotFound {
+			log.Record(&log.DNSLog{s.name, domain, ips, log.DNSQueried, time.Since(start), err})
 			return ips, err
 		}
 

app/dns/fakedns/errors.generated.go

@@ -0,0 +1,9 @@
+package fakedns
+
+import "github.com/xtls/xray-core/common/errors"
+
+type errPathObjHolder struct{}
+
+func newError(values ...interface{}) *errors.Error {
+	return errors.New(values...).WithPathObj(errPathObjHolder{})
+}

app/dns/fakedns/fake.go

@@ -0,0 +1,134 @@
+package fakedns
+
+import (
+	"context"
+	"math"
+	"math/big"
+	gonet "net"
+	"time"
+
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/cache"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/features/dns"
+)
+
+type Holder struct {
+	domainToIP cache.Lru
+	ipRange    *gonet.IPNet
+
+	config *FakeDnsPool
+}
+
+func (*Holder) Type() interface{} {
+	return (*dns.FakeDNSEngine)(nil)
+}
+
+func (fkdns *Holder) Start() error {
+	return fkdns.initializeFromConfig()
+}
+
+func (fkdns *Holder) Close() error {
+	fkdns.domainToIP = nil
+	fkdns.ipRange = nil
+	return nil
+}
+
+func NewFakeDNSHolder() (*Holder, error) {
+	var fkdns *Holder
+	var err error
+
+	if fkdns, err = NewFakeDNSHolderConfigOnly(nil); err != nil {
+		return nil, newError("Unable to create Fake Dns Engine").Base(err).AtError()
+	}
+	err = fkdns.initialize(dns.FakeIPPool, 65535)
+	if err != nil {
+		return nil, err
+	}
+	return fkdns, nil
+}
+
+func NewFakeDNSHolderConfigOnly(conf *FakeDnsPool) (*Holder, error) {
+	return &Holder{nil, nil, conf}, nil
+}
+
+func (fkdns *Holder) initializeFromConfig() error {
+	return fkdns.initialize(fkdns.config.IpPool, int(fkdns.config.LruSize))
+}
+
+func (fkdns *Holder) initialize(ipPoolCidr string, lruSize int) error {
+	var ipRange *gonet.IPNet
+	var err error
+
+	if _, ipRange, err = gonet.ParseCIDR(ipPoolCidr); err != nil {
+		return newError("Unable to parse CIDR for Fake DNS IP assignment").Base(err).AtError()
+	}
+
+	ones, bits := ipRange.Mask.Size()
+	rooms := bits - ones
+	if math.Log2(float64(lruSize)) >= float64(rooms) {
+		return newError("LRU size is bigger than subnet size").AtError()
+	}
+	fkdns.domainToIP = cache.NewLru(lruSize)
+	fkdns.ipRange = ipRange
+	return nil
+}
+
+// GetFakeIPForDomain check and generate a fake IP for a domain name
+func (fkdns *Holder) GetFakeIPForDomain(domain string) []net.Address {
+	if v, ok := fkdns.domainToIP.Get(domain); ok {
+		return []net.Address{v.(net.Address)}
+	}
+	var currentTimeMillis = uint64(time.Now().UnixNano() / 1e6)
+	ones, bits := fkdns.ipRange.Mask.Size()
+	rooms := bits - ones
+	if rooms < 64 {
+		currentTimeMillis %= (uint64(1) << rooms)
+	}
+	var bigIntIP = big.NewInt(0).SetBytes(fkdns.ipRange.IP)
+	bigIntIP = bigIntIP.Add(bigIntIP, new(big.Int).SetUint64(currentTimeMillis))
+	var ip net.Address
+	for {
+		ip = net.IPAddress(bigIntIP.Bytes())
+
+		// if we run for a long time, we may go back to beginning and start seeing the IP in use
+		if _, ok := fkdns.domainToIP.PeekKeyFromValue(ip); !ok {
+			break
+		}
+
+		bigIntIP = bigIntIP.Add(bigIntIP, big.NewInt(1))
+		if !fkdns.ipRange.Contains(bigIntIP.Bytes()) {
+			bigIntIP = big.NewInt(0).SetBytes(fkdns.ipRange.IP)
+		}
+	}
+	fkdns.domainToIP.Put(domain, ip)
+	return []net.Address{ip}
+}
+
+// GetDomainFromFakeDNS check if an IP is a fake IP and have corresponding domain name
+func (fkdns *Holder) GetDomainFromFakeDNS(ip net.Address) string {
+	if !ip.Family().IsIP() || !fkdns.ipRange.Contains(ip.IP()) {
+		return ""
+	}
+	if k, ok := fkdns.domainToIP.GetKeyFromValue(ip); ok {
+		return k.(string)
+	}
+	newError("A fake ip request to ", ip, ", however there is no matching domain name in fake DNS").AtInfo().WriteToLog()
+	return ""
+}
+
+// GetFakeIPRange return fake IP range from configuration
+func (fkdns *Holder) GetFakeIPRange() *gonet.IPNet {
+	return fkdns.ipRange
+}
+
+func init() {
+	common.Must(common.RegisterConfig((*FakeDnsPool)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
+		var f *Holder
+		var err error
+		if f, err = NewFakeDNSHolderConfigOnly(config.(*FakeDnsPool)); err != nil {
+			return nil, err
+		}
+		return f, nil
+	}))
+}

app/dns/fakedns/fakedns.go

@@ -0,0 +1,3 @@
+package fakedns
+
+//go:generate go run github.com/xtls/xray-core/common/errors/errorgen

app/dns/fakedns/fakedns.pb.go

@@ -0,0 +1,164 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.25.0
+// 	protoc        v3.13.0
+// source: app/dns/fakedns/fakedns.proto
+
+package fakedns
+
+import (
+	proto "github.com/golang/protobuf/proto"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
+type FakeDnsPool struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	IpPool  string `protobuf:"bytes,1,opt,name=ip_pool,json=ipPool,proto3" json:"ip_pool,omitempty"` //CIDR of IP pool used as fake DNS IP
+	LruSize int64  `protobuf:"varint,2,opt,name=lruSize,proto3" json:"lruSize,omitempty"`            //Size of Pool for remembering relationship between domain name and IP address
+}
+
+func (x *FakeDnsPool) Reset() {
+	*x = FakeDnsPool{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_app_dns_fakedns_fakedns_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *FakeDnsPool) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*FakeDnsPool) ProtoMessage() {}
+
+func (x *FakeDnsPool) ProtoReflect() protoreflect.Message {
+	mi := &file_app_dns_fakedns_fakedns_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use FakeDnsPool.ProtoReflect.Descriptor instead.
+func (*FakeDnsPool) Descriptor() ([]byte, []int) {
+	return file_app_dns_fakedns_fakedns_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *FakeDnsPool) GetIpPool() string {
+	if x != nil {
+		return x.IpPool
+	}
+	return ""
+}
+
+func (x *FakeDnsPool) GetLruSize() int64 {
+	if x != nil {
+		return x.LruSize
+	}
+	return 0
+}
+
+var File_app_dns_fakedns_fakedns_proto protoreflect.FileDescriptor
+
+var file_app_dns_fakedns_fakedns_proto_rawDesc = []byte{
+	0x0a, 0x1d, 0x61, 0x70, 0x70, 0x2f, 0x64, 0x6e, 0x73, 0x2f, 0x66, 0x61, 0x6b, 0x65, 0x64, 0x6e,
+	0x73, 0x2f, 0x66, 0x61, 0x6b, 0x65, 0x64, 0x6e, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12,
+	0x1a, 0x76, 0x32, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x72, 0x65, 0x2e, 0x61, 0x70, 0x70, 0x2e,
+	0x64, 0x6e, 0x73, 0x2e, 0x66, 0x61, 0x6b, 0x65, 0x64, 0x6e, 0x73, 0x22, 0x40, 0x0a, 0x0b, 0x46,
+	0x61, 0x6b, 0x65, 0x44, 0x6e, 0x73, 0x50, 0x6f, 0x6f, 0x6c, 0x12, 0x17, 0x0a, 0x07, 0x69, 0x70,
+	0x5f, 0x70, 0x6f, 0x6f, 0x6c, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x06, 0x69, 0x70, 0x50,
+	0x6f, 0x6f, 0x6c, 0x12, 0x18, 0x0a, 0x07, 0x6c, 0x72, 0x75, 0x53, 0x69, 0x7a, 0x65, 0x18, 0x02,
+	0x20, 0x01, 0x28, 0x03, 0x52, 0x07, 0x6c, 0x72, 0x75, 0x53, 0x69, 0x7a, 0x65, 0x42, 0x5f, 0x0a,
+	0x1e, 0x63, 0x6f, 0x6d, 0x2e, 0x76, 0x32, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x72, 0x65, 0x2e,
+	0x61, 0x70, 0x70, 0x2e, 0x64, 0x6e, 0x73, 0x2e, 0x66, 0x61, 0x6b, 0x65, 0x64, 0x6e, 0x73, 0x50,
+	0x01, 0x5a, 0x1e, 0x76, 0x32, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x63, 0x6f, 0x72,
+	0x65, 0x2f, 0x61, 0x70, 0x70, 0x2f, 0x64, 0x6e, 0x73, 0x2f, 0x66, 0x61, 0x6b, 0x65, 0x64, 0x6e,
+	0x73, 0xaa, 0x02, 0x1a, 0x56, 0x32, 0x52, 0x61, 0x79, 0x2e, 0x43, 0x6f, 0x72, 0x65, 0x2e, 0x41,
+	0x70, 0x70, 0x2e, 0x44, 0x6e, 0x73, 0x2e, 0x46, 0x61, 0x6b, 0x65, 0x64, 0x6e, 0x73, 0x62, 0x06,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_app_dns_fakedns_fakedns_proto_rawDescOnce sync.Once
+	file_app_dns_fakedns_fakedns_proto_rawDescData = file_app_dns_fakedns_fakedns_proto_rawDesc
+)
+
+func file_app_dns_fakedns_fakedns_proto_rawDescGZIP() []byte {
+	file_app_dns_fakedns_fakedns_proto_rawDescOnce.Do(func() {
+		file_app_dns_fakedns_fakedns_proto_rawDescData = protoimpl.X.CompressGZIP(file_app_dns_fakedns_fakedns_proto_rawDescData)
+	})
+	return file_app_dns_fakedns_fakedns_proto_rawDescData
+}
+
+var file_app_dns_fakedns_fakedns_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_app_dns_fakedns_fakedns_proto_goTypes = []interface{}{
+	(*FakeDnsPool)(nil), // 0: xray.app.dns.fakedns.FakeDnsPool
+}
+var file_app_dns_fakedns_fakedns_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_app_dns_fakedns_fakedns_proto_init() }
+func file_app_dns_fakedns_fakedns_proto_init() {
+	if File_app_dns_fakedns_fakedns_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_app_dns_fakedns_fakedns_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*FakeDnsPool); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_app_dns_fakedns_fakedns_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_app_dns_fakedns_fakedns_proto_goTypes,
+		DependencyIndexes: file_app_dns_fakedns_fakedns_proto_depIdxs,
+		MessageInfos:      file_app_dns_fakedns_fakedns_proto_msgTypes,
+	}.Build()
+	File_app_dns_fakedns_fakedns_proto = out.File
+	file_app_dns_fakedns_fakedns_proto_rawDesc = nil
+	file_app_dns_fakedns_fakedns_proto_goTypes = nil
+	file_app_dns_fakedns_fakedns_proto_depIdxs = nil
+}

app/dns/fakedns/fakedns.proto

@@ -0,0 +1,12 @@
+syntax = "proto3";
+
+package xray.app.dns.fakedns;
+option csharp_namespace = "Xray.App.Dns.Fakedns";
+option go_package = "github.com/xtls/xray-core/app/dns/fakedns";
+option java_package = "com.xray.app.dns.fakedns";
+option java_multiple_files = true;
+
+message FakeDnsPool{
+  string ip_pool = 1; //CIDR of IP pool used as fake DNS IP
+  int64  lruSize = 2; //Size of Pool for remembering relationship between domain name and IP address
+}

app/dns/fakedns/fakedns_test.go

@@ -0,0 +1,105 @@
+package fakedns
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/uuid"
+	"github.com/xtls/xray-core/features/dns"
+)
+
+var (
+	ipPrefix = "198.18."
+)
+
+func TestNewFakeDnsHolder(_ *testing.T) {
+	_, err := NewFakeDNSHolder()
+	common.Must(err)
+}
+
+func TestFakeDnsHolderCreateMapping(t *testing.T) {
+	fkdns, err := NewFakeDNSHolder()
+	common.Must(err)
+
+	addr := fkdns.GetFakeIPForDomain("fakednstest.example.com")
+	assert.Equal(t, ipPrefix, addr[0].IP().String()[0:len(ipPrefix)])
+}
+
+func TestFakeDnsHolderCreateMappingMany(t *testing.T) {
+	fkdns, err := NewFakeDNSHolder()
+	common.Must(err)
+
+	addr := fkdns.GetFakeIPForDomain("fakednstest.example.com")
+	assert.Equal(t, ipPrefix, addr[0].IP().String()[0:len(ipPrefix)])
+
+	addr2 := fkdns.GetFakeIPForDomain("fakednstest2.example.com")
+	assert.Equal(t, ipPrefix, addr2[0].IP().String()[0:len(ipPrefix)])
+	assert.NotEqual(t, addr[0].IP().String(), addr2[0].IP().String())
+}
+
+func TestFakeDnsHolderCreateMappingManyAndResolve(t *testing.T) {
+	fkdns, err := NewFakeDNSHolder()
+	common.Must(err)
+
+	addr := fkdns.GetFakeIPForDomain("fakednstest.example.com")
+	addr2 := fkdns.GetFakeIPForDomain("fakednstest2.example.com")
+
+	{
+		result := fkdns.GetDomainFromFakeDNS(addr[0])
+		assert.Equal(t, "fakednstest.example.com", result)
+	}
+
+	{
+		result := fkdns.GetDomainFromFakeDNS(addr2[0])
+		assert.Equal(t, "fakednstest2.example.com", result)
+	}
+}
+
+func TestFakeDnsHolderCreateMappingManySingleDomain(t *testing.T) {
+	fkdns, err := NewFakeDNSHolder()
+	common.Must(err)
+
+	addr := fkdns.GetFakeIPForDomain("fakednstest.example.com")
+	addr2 := fkdns.GetFakeIPForDomain("fakednstest.example.com")
+	assert.Equal(t, addr[0].IP().String(), addr2[0].IP().String())
+}
+
+func TestFakeDnsHolderCreateMappingAndRollOver(t *testing.T) {
+	fkdns, err := NewFakeDNSHolderConfigOnly(&FakeDnsPool{
+		IpPool:  dns.FakeIPPool,
+		LruSize: 256,
+	})
+	common.Must(err)
+
+	err = fkdns.Start()
+
+	common.Must(err)
+
+	addr := fkdns.GetFakeIPForDomain("fakednstest.example.com")
+	addr2 := fkdns.GetFakeIPForDomain("fakednstest2.example.com")
+
+	for i := 0; i <= 8192; i++ {
+		{
+			result := fkdns.GetDomainFromFakeDNS(addr[0])
+			assert.Equal(t, "fakednstest.example.com", result)
+		}
+
+		{
+			result := fkdns.GetDomainFromFakeDNS(addr2[0])
+			assert.Equal(t, "fakednstest2.example.com", result)
+		}
+
+		{
+			uuid := uuid.New()
+			domain := uuid.String() + ".fakednstest.example.com"
+			tempAddr := fkdns.GetFakeIPForDomain(domain)
+			rsaddr := tempAddr[0].IP().String()
+
+			result := fkdns.GetDomainFromFakeDNS(net.ParseAddress(rsaddr))
+			assert.Equal(t, domain, result)
+		}
+	}
+}

app/dns/hosts.go

@@ -5,6 +5,7 @@ import (
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/strmatcher"
 	"github.com/xtls/xray-core/features"
+	"github.com/xtls/xray-core/features/dns"
 )
 
 // StaticHosts represents static domain-ip mapping in DNS server.
@@ -92,7 +93,7 @@ func NewStaticHosts(hosts []*Config_HostMapping, legacy map[string]*net.IPOrDoma
 	return sh, nil
 }
 
-func filterIP(ips []net.Address, option IPOption) []net.Address {
+func filterIP(ips []net.Address, option dns.IPOption) []net.Address {
 	filtered := make([]net.Address, 0, len(ips))
 	for _, ip := range ips {
 		if (ip.Family().IsIPv4() && option.IPv4Enable) || (ip.Family().IsIPv6() && option.IPv6Enable) {
@@ -106,7 +107,7 @@ func filterIP(ips []net.Address, option IPOption) []net.Address {
 }
 
 // LookupIP returns IP address for the given domain, if exists in this StaticHosts.
-func (h *StaticHosts) LookupIP(domain string, option IPOption) []net.Address {
+func (h *StaticHosts) LookupIP(domain string, option dns.IPOption) []net.Address {
 	indices := h.matchers.Match(domain)
 	if len(indices) == 0 {
 		return nil

app/dns/hosts_test.go

@@ -8,6 +8,7 @@ import (
 	. "github.com/xtls/xray-core/app/dns"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/features/dns"
 )
 
 func TestStaticHosts(t *testing.T) {
@@ -39,7 +40,7 @@ func TestStaticHosts(t *testing.T) {
 	common.Must(err)
 
 	{
-		ips := hosts.LookupIP("example.com", IPOption{
+		ips := hosts.LookupIP("example.com", dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 		})
@@ -52,7 +53,7 @@ func TestStaticHosts(t *testing.T) {
 	}
 
 	{
-		ips := hosts.LookupIP("www.example.cn", IPOption{
+		ips := hosts.LookupIP("www.example.cn", dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 		})
@@ -65,7 +66,7 @@ func TestStaticHosts(t *testing.T) {
 	}
 
 	{
-		ips := hosts.LookupIP("baidu.com", IPOption{
+		ips := hosts.LookupIP("baidu.com", dns.IPOption{
 			IPv4Enable: false,
 			IPv6Enable: true,
 		})

app/dns/nameserver.go

@@ -4,39 +4,26 @@ import (
 	"context"
 
 	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/dns/localdns"
 )
 
-// IPOption is an object for IP query options.
-type IPOption struct {
-	IPv4Enable bool
-	IPv6Enable bool
-}
-
 // Client is the interface for DNS client.
 type Client interface {
 	// Name of the Client.
 	Name() string
 
 	// QueryIP sends IP queries to its configured server.
-	QueryIP(ctx context.Context, domain string, option IPOption) ([]net.IP, error)
+	QueryIP(ctx context.Context, domain string, option dns.IPOption) ([]net.IP, error)
 }
 
 type LocalNameServer struct {
 	client *localdns.Client
 }
 
-func (s *LocalNameServer) QueryIP(ctx context.Context, domain string, option IPOption) ([]net.IP, error) {
-	if option.IPv4Enable && option.IPv6Enable {
-		return s.client.LookupIP(domain)
-	}
-
-	if option.IPv4Enable {
-		return s.client.LookupIPv4(domain)
-	}
-
-	if option.IPv6Enable {
-		return s.client.LookupIPv6(domain)
+func (s *LocalNameServer) QueryIP(_ context.Context, domain string, option dns.IPOption) ([]net.IP, error) {
+	if option.IPv4Enable || option.IPv6Enable {
+		return s.client.LookupIP(domain, option)
 	}
 
 	return nil, newError("neither IPv4 nor IPv6 is enabled")

app/dns/nameserver_fakedns.go

@@ -0,0 +1,41 @@
+package dns
+
+import (
+	"context"
+
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/core"
+	"github.com/xtls/xray-core/features/dns"
+)
+
+type FakeDNSServer struct {
+	fakeDNSEngine dns.FakeDNSEngine
+}
+
+func NewFakeDNSServer() *FakeDNSServer {
+	return &FakeDNSServer{}
+}
+
+func (FakeDNSServer) Name() string {
+	return "FakeDNS"
+}
+
+func (f *FakeDNSServer) QueryIP(ctx context.Context, domain string, _ dns.IPOption) ([]net.IP, error) {
+	if f.fakeDNSEngine == nil {
+		if err := core.RequireFeatures(ctx, func(fd dns.FakeDNSEngine) {
+			f.fakeDNSEngine = fd
+		}); err != nil {
+			return nil, newError("Unable to locate a fake DNS Engine").Base(err).AtError()
+		}
+	}
+	ips := f.fakeDNSEngine.GetFakeIPForDomain(domain)
+
+	netIP := toNetIP(ips)
+	if netIP == nil {
+		return nil, newError("Unable to convert IP to net ip").AtError()
+	}
+
+	newError(f.Name(), " got answer: ", domain, " -> ", ips).AtInfo().WriteToLog()
+
+	return netIP, nil
+}

app/dns/nameserver_test.go

@@ -7,14 +7,16 @@ import (
 
 	. "github.com/xtls/xray-core/app/dns"
 	"github.com/xtls/xray-core/common"
+	dns_feature "github.com/xtls/xray-core/features/dns"
 )
 
 func TestLocalNameServer(t *testing.T) {
 	s := NewLocalNameServer()
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*2)
-	ips, err := s.QueryIP(ctx, "google.com", IPOption{
+	ips, err := s.QueryIP(ctx, "google.com", dns_feature.IPOption{
 		IPv4Enable: true,
 		IPv6Enable: true,
+		FakeEnable: false,
 	})
 	cancel()
 	common.Must(err)

app/dns/server.go

@@ -22,6 +22,7 @@ import (
 	"github.com/xtls/xray-core/features"
 	"github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/routing"
+	"github.com/xtls/xray-core/transport/internet"
 )
 
 // Server is a DNS rely server.
@@ -29,7 +30,8 @@ type Server struct {
 	sync.Mutex
 	hosts         *StaticHosts
 	clientIP      net.IP
-	clients       []Client             // clientIdx -> Client
+	clients       []Client // clientIdx -> Client
+	ctx           context.Context
 	ipIndexMap    []*MultiGeoIPMatcher // clientIdx -> *MultiGeoIPMatcher
 	domainRules   [][]string           // clientIdx -> domainRuleIdx -> DomainRule
 	domainMatcher strmatcher.IndexMatcher
@@ -74,6 +76,7 @@ func generateRandomTag() string {
 func New(ctx context.Context, config *Config) (*Server, error) {
 	server := &Server{
 		clients: make([]Client, 0, len(config.NameServers)+len(config.NameServer)),
+		ctx:     ctx,
 		tag:     config.Tag,
 	}
 	if server.tag == "" {
@@ -143,6 +146,9 @@ func New(ctx context.Context, config *Config) (*Server, error) {
 				server.clients[idx] = c
 			}))
 
+		case address.Family().IsDomain() && address.Domain() == "fakedns":
+			server.clients = append(server.clients, NewFakeDNSServer())
+
 		default:
 			// UDP classic DNS mode
 			dest := endpoint.AsDestination()
@@ -294,13 +300,14 @@ func (s *Server) Match(idx int, client Client, domain string, ips []net.IP) ([]n
 	return newIps, nil
 }
 
-func (s *Server) queryIPTimeout(idx int, client Client, domain string, option IPOption) ([]net.IP, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), time.Second*4)
+func (s *Server) queryIPTimeout(idx int, client Client, domain string, option dns.IPOption) ([]net.IP, error) {
+	ctx, cancel := context.WithTimeout(s.ctx, time.Second*4)
 	if len(s.tag) > 0 {
 		ctx = session.ContextWithInbound(ctx, &session.Inbound{
 			Tag: s.tag,
 		})
 	}
+	ctx = internet.ContextWithLookupDomain(ctx, domain)
 	ips, err := client.QueryIP(ctx, domain, option)
 	cancel()
 
@@ -312,31 +319,7 @@ func (s *Server) queryIPTimeout(idx int, client Client, domain string, option IP
 	return ips, err
 }
 
-// LookupIP implements dns.Client.
-func (s *Server) LookupIP(domain string) ([]net.IP, error) {
-	return s.lookupIPInternal(domain, IPOption{
-		IPv4Enable: true,
-		IPv6Enable: true,
-	})
-}
-
-// LookupIPv4 implements dns.IPv4Lookup.
-func (s *Server) LookupIPv4(domain string) ([]net.IP, error) {
-	return s.lookupIPInternal(domain, IPOption{
-		IPv4Enable: true,
-		IPv6Enable: false,
-	})
-}
-
-// LookupIPv6 implements dns.IPv6Lookup.
-func (s *Server) LookupIPv6(domain string) ([]net.IP, error) {
-	return s.lookupIPInternal(domain, IPOption{
-		IPv4Enable: false,
-		IPv6Enable: true,
-	})
-}
-
-func (s *Server) lookupStatic(domain string, option IPOption, depth int32) []net.Address {
+func (s *Server) lookupStatic(domain string, option dns.IPOption, depth int32) []net.Address {
 	ips := s.hosts.LookupIP(domain, option)
 	if ips == nil {
 		return nil
@@ -360,14 +343,15 @@ func toNetIP(ips []net.Address) []net.IP {
 	return netips
 }
 
-func (s *Server) lookupIPInternal(domain string, option IPOption) ([]net.IP, error) {
+// LookupIP implements dns.Client.
+func (s *Server) LookupIP(domain string, option dns.IPOption) ([]net.IP, error) {
 	if domain == "" {
 		return nil, newError("empty domain name")
 	}
 	domain = strings.ToLower(domain)
 
 	// normalize the FQDN form query
-	if domain[len(domain)-1] == '.' {
+	if strings.HasSuffix(domain, ".") {
 		domain = domain[:len(domain)-1]
 	}
 
@@ -404,6 +388,10 @@ func (s *Server) lookupIPInternal(domain string, option IPOption) ([]net.IP, err
 		for _, idx := range indices {
 			clientIdx := int(s.matcherInfos[idx].clientIdx)
 			matchedClient = s.clients[clientIdx]
+			if !option.FakeEnable && strings.EqualFold(matchedClient.Name(), "FakeDNS") {
+				newError("skip DNS resolution for domain ", domain, " at server ", matchedClient.Name()).AtDebug().WriteToLog()
+				continue
+			}
 			ips, err := s.queryIPTimeout(clientIdx, matchedClient, domain, option)
 			if len(ips) > 0 {
 				return ips, nil
@@ -423,7 +411,10 @@ func (s *Server) lookupIPInternal(domain string, option IPOption) ([]net.IP, err
 			newError("domain ", domain, " at server ", client.Name(), " idx:", idx, " already lookup failed, just ignore").AtDebug().WriteToLog()
 			continue
 		}
-
+		if !option.FakeEnable && strings.EqualFold(client.Name(), "FakeDNS") {
+			newError("skip DNS resolution for domain ", domain, " at server ", client.Name()).AtDebug().WriteToLog()
+			continue
+		}
 		ips, err := s.queryIPTimeout(idx, client, domain, option)
 		if len(ips) > 0 {
 			return ips, nil

app/dns/server_test.go

@@ -154,7 +154,11 @@ func TestUDPServerSubnet(t *testing.T) {
 
 	client := v.GetFeature(feature_dns.ClientType()).(feature_dns.Client)
 
-	ips, err := client.LookupIP("google.com")
+	ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+		IPv4Enable: true,
+		IPv6Enable: true,
+		FakeEnable: false,
+	})
 	if err != nil {
 		t.Fatal("unexpected error: ", err)
 	}
@@ -209,7 +213,11 @@ func TestUDPServer(t *testing.T) {
 	client := v.GetFeature(feature_dns.ClientType()).(feature_dns.Client)
 
 	{
-		ips, err := client.LookupIP("google.com")
+		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -220,7 +228,11 @@ func TestUDPServer(t *testing.T) {
 	}
 
 	{
-		ips, err := client.LookupIP("facebook.com")
+		ips, err := client.LookupIP("facebook.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -231,7 +243,11 @@ func TestUDPServer(t *testing.T) {
 	}
 
 	{
-		_, err := client.LookupIP("notexist.google.com")
+		_, err := client.LookupIP("notexist.google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err == nil {
 			t.Fatal("nil error")
 		}
@@ -241,8 +257,11 @@ func TestUDPServer(t *testing.T) {
 	}
 
 	{
-		clientv6 := client.(feature_dns.IPv6Lookup)
-		ips, err := clientv6.LookupIPv6("ipv4only.google.com")
+		ips, err := client.LookupIP("ipv4only.google.com", feature_dns.IPOption{
+			IPv4Enable: false,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != feature_dns.ErrEmptyResponse {
 			t.Fatal("error: ", err)
 		}
@@ -254,7 +273,11 @@ func TestUDPServer(t *testing.T) {
 	dnsServer.Shutdown()
 
 	{
-		ips, err := client.LookupIP("google.com")
+		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -331,7 +354,11 @@ func TestPrioritizedDomain(t *testing.T) {
 	startTime := time.Now()
 
 	{
-		ips, err := client.LookupIP("google.com")
+		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -390,10 +417,12 @@ func TestUDPServerIPv6(t *testing.T) {
 	common.Must(err)
 
 	client := v.GetFeature(feature_dns.ClientType()).(feature_dns.Client)
-	client6 := client.(feature_dns.IPv6Lookup)
-
 	{
-		ips, err := client6.LookupIPv6("ipv6.google.com")
+		ips, err := client.LookupIP("ipv6.google.com", feature_dns.IPOption{
+			IPv4Enable: false,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -456,7 +485,11 @@ func TestStaticHostDomain(t *testing.T) {
 	client := v.GetFeature(feature_dns.ClientType()).(feature_dns.Client)
 
 	{
-		ips, err := client.LookupIP("example.com")
+		ips, err := client.LookupIP("example.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -563,7 +596,11 @@ func TestIPMatch(t *testing.T) {
 	startTime := time.Now()
 
 	{
-		ips, err := client.LookupIP("google.com")
+		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -682,7 +719,11 @@ func TestLocalDomain(t *testing.T) {
 	startTime := time.Now()
 
 	{ // Will match dotless:
-		ips, err := client.LookupIP("hostname")
+		ips, err := client.LookupIP("hostname", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -693,7 +734,11 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match domain:local
-		ips, err := client.LookupIP("hostname.local")
+		ips, err := client.LookupIP("hostname.local", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -704,7 +749,11 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match static ip
-		ips, err := client.LookupIP("hostnamestatic")
+		ips, err := client.LookupIP("hostnamestatic", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -715,7 +764,11 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match domain replacing
-		ips, err := client.LookupIP("hostnamealias")
+		ips, err := client.LookupIP("hostnamealias", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -726,7 +779,11 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match dotless:localhost, but not expectIPs: 127.0.0.2, 127.0.0.3, then matches at dotless:
-		ips, err := client.LookupIP("localhost")
+		ips, err := client.LookupIP("localhost", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -737,7 +794,11 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match dotless:localhost, and expectIPs: 127.0.0.2, 127.0.0.3
-		ips, err := client.LookupIP("localhost-a")
+		ips, err := client.LookupIP("localhost-a", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -748,7 +809,11 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match dotless:localhost, and expectIPs: 127.0.0.2, 127.0.0.3
-		ips, err := client.LookupIP("localhost-b")
+		ips, err := client.LookupIP("localhost-b", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -759,7 +824,11 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match dotless:
-		ips, err := client.LookupIP("Mijia Cloud")
+		ips, err := client.LookupIP("Mijia Cloud", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -921,7 +990,11 @@ func TestMultiMatchPrioritizedDomain(t *testing.T) {
 	startTime := time.Now()
 
 	{ // Will match server 1,2 and server 1 returns expected ip
-		ips, err := client.LookupIP("google.com")
+		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -932,8 +1005,11 @@ func TestMultiMatchPrioritizedDomain(t *testing.T) {
 	}
 
 	{ // Will match server 1,2 and server 1 returns unexpected ip, then server 2 returns expected one
-		clientv4 := client.(feature_dns.IPv4Lookup)
-		ips, err := clientv4.LookupIPv4("ipv6.google.com")
+		ips, err := client.LookupIP("ipv6.google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: false,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -944,7 +1020,11 @@ func TestMultiMatchPrioritizedDomain(t *testing.T) {
 	}
 
 	{ // Will match server 3,1,2 and server 3 returns expected one
-		ips, err := client.LookupIP("api.google.com")
+		ips, err := client.LookupIP("api.google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}
@@ -955,7 +1035,11 @@ func TestMultiMatchPrioritizedDomain(t *testing.T) {
 	}
 
 	{ // Will match server 4,3,1,2 and server 4 returns expected one
-		ips, err := client.LookupIP("v2.api.google.com")
+		ips, err := client.LookupIP("v2.api.google.com", feature_dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err != nil {
 			t.Fatal("unexpected error: ", err)
 		}

app/dns/udpns.go

@@ -2,12 +2,14 @@ package dns
 
 import (
 	"context"
+	"github.com/xtls/xray-core/transport/internet"
 	"strings"
 	"sync"
 	"sync/atomic"
 	"time"
 
 	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/log"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/protocol/dns"
 	udp_proto "github.com/xtls/xray-core/common/protocol/udp"
@@ -52,7 +54,7 @@ func NewClassicNameServer(address net.Destination, dispatcher routing.Dispatcher
 		Execute:  s.Cleanup,
 	}
 	s.udpServer = udp.NewDispatcher(dispatcher, s.HandleResponse)
-	newError("DNS: created udp client inited for ", address.NetAddr()).AtInfo().WriteToLog()
+	newError("DNS: created UDP client initialized for ", address.NetAddr()).AtInfo().WriteToLog()
 	return s
 }
 
@@ -178,7 +180,7 @@ func (s *ClassicNameServer) addPendingRequest(req *dnsRequest) {
 	s.requests[id] = *req
 }
 
-func (s *ClassicNameServer) sendQuery(ctx context.Context, domain string, option IPOption) {
+func (s *ClassicNameServer) sendQuery(ctx context.Context, domain string, option dns_feature.IPOption) {
 	newError(s.name, " querying DNS for: ", domain).AtDebug().WriteToLog(session.ExportIDToError(ctx))
 
 	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(s.clientIP))
@@ -190,14 +192,21 @@ func (s *ClassicNameServer) sendQuery(ctx context.Context, domain string, option
 		if inbound := session.InboundFromContext(ctx); inbound != nil {
 			udpCtx = session.ContextWithInbound(udpCtx, inbound)
 		}
+		udpCtx = internet.ContextWithLookupDomain(udpCtx, internet.LookupDomainFromContext(ctx))
 		udpCtx = session.ContextWithContent(udpCtx, &session.Content{
 			Protocol: "dns",
 		})
+		udpCtx = log.ContextWithAccessMessage(udpCtx, &log.AccessMessage{
+			From:   "DNS",
+			To:     s.address,
+			Status: log.AccessAccepted,
+			Reason: "",
+		})
 		s.udpServer.Dispatch(udpCtx, s.address, b)
 	}
 }
 
-func (s *ClassicNameServer) findIPsForDomain(domain string, option IPOption) ([]net.IP, error) {
+func (s *ClassicNameServer) findIPsForDomain(domain string, option dns_feature.IPOption) ([]net.IP, error) {
 	s.RLock()
 	record, found := s.ips[domain]
 	s.RUnlock()
@@ -235,12 +244,14 @@ func (s *ClassicNameServer) findIPsForDomain(domain string, option IPOption) ([]
 	return nil, dns_feature.ErrEmptyResponse
 }
 
-func (s *ClassicNameServer) QueryIP(ctx context.Context, domain string, option IPOption) ([]net.IP, error) {
+// QueryIP implements Server.
+func (s *ClassicNameServer) QueryIP(ctx context.Context, domain string, option dns_feature.IPOption) ([]net.IP, error) {
 	fqdn := Fqdn(domain)
 
 	ips, err := s.findIPsForDomain(fqdn, option)
 	if err != errRecordNotFound {
 		newError(s.name, " cache HIT ", domain, " -> ", ips).Base(err).AtDebug().WriteToLog()
+		log.Record(&log.DNSLog{s.name, domain, ips, log.DNSCacheHit, 0, err})
 		return ips, err
 	}
 
@@ -271,10 +282,12 @@ func (s *ClassicNameServer) QueryIP(ctx context.Context, domain string, option I
 		close(done)
 	}()
 	s.sendQuery(ctx, fqdn, option)
+	start := time.Now()
 
 	for {
 		ips, err := s.findIPsForDomain(fqdn, option)
 		if err != errRecordNotFound {
+			log.Record(&log.DNSLog{s.name, domain, ips, log.DNSQueried, time.Since(start), err})
 			return ips, err
 		}
 

app/log/config.pb.go

@@ -88,6 +88,7 @@ type Config struct {
 	ErrorLogPath  string       `protobuf:"bytes,3,opt,name=error_log_path,json=errorLogPath,proto3" json:"error_log_path,omitempty"`
 	AccessLogType LogType      `protobuf:"varint,4,opt,name=access_log_type,json=accessLogType,proto3,enum=xray.app.log.LogType" json:"access_log_type,omitempty"`
 	AccessLogPath string       `protobuf:"bytes,5,opt,name=access_log_path,json=accessLogPath,proto3" json:"access_log_path,omitempty"`
+	EnableDnsLog  bool         `protobuf:"varint,6,opt,name=enable_dns_log,json=enableDnsLog,proto3" json:"enable_dns_log,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -157,13 +158,20 @@ func (x *Config) GetAccessLogPath() string {
 	return ""
 }
 
+func (x *Config) GetEnableDnsLog() bool {
+	if x != nil {
+		return x.EnableDnsLog
+	}
+	return false
+}
+
 var File_app_log_config_proto protoreflect.FileDescriptor
 
 var file_app_log_config_proto_rawDesc = []byte{
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@@ -181,15 +189,17 @@ var file_app_log_config_proto_rawDesc = []byte{
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 }
 
 var (

app/log/config.proto

@@ -22,4 +22,5 @@ message Config {
 
   LogType access_log_type = 4;
   string access_log_path = 5;
+  bool enable_dns_log = 6;
 }

app/log/log.go

@@ -17,6 +17,7 @@ type Instance struct {
 	accessLogger log.Handler
 	errorLogger  log.Handler
 	active       bool
+	dns          bool
 }
 
 // New creates a new log.Instance based on the given config.
@@ -24,6 +25,7 @@ func New(ctx context.Context, config *Config) (*Instance, error) {
 	g := &Instance{
 		config: config,
 		active: false,
+		dns:    config.EnableDnsLog,
 	}
 	log.RegisterHandler(g)
 
@@ -103,6 +105,10 @@ func (g *Instance) Handle(msg log.Message) {
 		if g.accessLogger != nil {
 			g.accessLogger.Handle(msg)
 		}
+	case *log.DNSLog:
+		if g.dns && g.accessLogger != nil {
+			g.accessLogger.Handle(msg)
+		}
 	case *log.GeneralMessage:
 		if g.errorLogger != nil && msg.Severity <= g.config.ErrorLogLevel {
 			g.errorLogger.Handle(msg)

app/proxyman/config.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc        (unknown)
 // source: app/proxyman/config.proto
 
 package proxyman
@@ -239,9 +239,12 @@ type SniffingConfig struct {
 	// Whether or not to enable content sniffing on an inbound connection.
 	Enabled bool `protobuf:"varint,1,opt,name=enabled,proto3" json:"enabled,omitempty"`
 	// Override target destination if sniff'ed protocol is in the given list.
-	// Supported values are "http", "tls".
+	// Supported values are "http", "tls", "fakedns".
 	DestinationOverride []string `protobuf:"bytes,2,rep,name=destination_override,json=destinationOverride,proto3" json:"destination_override,omitempty"`
 	DomainsExcluded     []string `protobuf:"bytes,3,rep,name=domains_excluded,json=domainsExcluded,proto3" json:"domains_excluded,omitempty"`
+	// Whether should only try to sniff metadata without waiting for client input.
+	// Can be used to support SMTP like protocol where server send the first message.
+	MetadataOnly bool `protobuf:"varint,4,opt,name=metadata_only,json=metadataOnly,proto3" json:"metadata_only,omitempty"`
 }
 
 func (x *SniffingConfig) Reset() {
@@ -297,6 +300,13 @@ func (x *SniffingConfig) GetDomainsExcluded() []string {
 	return nil
 }
 
+func (x *SniffingConfig) GetMetadataOnly() bool {
+	if x != nil {
+		return x.MetadataOnly
+	}
+	return false
+}
+
 type ReceiverConfig struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -764,7 +774,7 @@ var file_app_proxyman_config_proto_rawDesc = []byte{
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@@ -773,86 +783,88 @@ var file_app_proxyman_config_proto_rawDesc = []byte{
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 }
 
 var (

app/proxyman/config.proto

@@ -54,9 +54,13 @@ message SniffingConfig {
   bool enabled = 1;
 
   // Override target destination if sniff'ed protocol is in the given list.
-  // Supported values are "http", "tls".
+  // Supported values are "http", "tls", "fakedns".
   repeated string destination_override = 2;
   repeated string domains_excluded = 3;
+  
+  // Whether should only try to sniff metadata without waiting for client input.
+  // Can be used to support SMTP like protocol where server send the first message.
+  bool metadata_only = 4;
 }
 
 message ReceiverConfig {

app/proxyman/inbound/always.go

@@ -133,6 +133,7 @@ func NewAlwaysOnInboundHandler(ctx context.Context, tag string, receiverConfig *
 					address:         address,
 					port:            net.Port(port),
 					dispatcher:      h.mux,
+					sniffingConfig:  receiverConfig.GetEffectiveSniffingSettings(),
 					uplinkCounter:   uplinkCounter,
 					downlinkCounter: downlinkCounter,
 					stream:          mss,

app/proxyman/inbound/dynamic.go

@@ -153,6 +153,7 @@ func (h *DynamicInboundHandler) refresh() error {
 				address:         address,
 				port:            port,
 				dispatcher:      h.mux,
+				sniffingConfig:  h.receiverConfig.GetEffectiveSniffingSettings(),
 				uplinkCounter:   uplinkCounter,
 				downlinkCounter: downlinkCounter,
 				stream:          h.streamSettings,

app/proxyman/inbound/worker.go

@@ -98,6 +98,7 @@ func (w *tcpWorker) callback(conn internet.Connection) {
 		content.SniffingRequest.Enabled = w.sniffingConfig.Enabled
 		content.SniffingRequest.OverrideDestinationForProtocol = w.sniffingConfig.DestinationOverride
 		content.SniffingRequest.ExcludeForDomain = w.sniffingConfig.DomainsExcluded
+		content.SniffingRequest.MetadataOnly = w.sniffingConfig.MetadataOnly
 	}
 	ctx = session.ContextWithContent(ctx, content)
 
@@ -235,6 +236,7 @@ type udpWorker struct {
 	tag             string
 	stream          *internet.MemoryStreamConfig
 	dispatcher      routing.Dispatcher
+	sniffingConfig  *proxyman.SniffingConfig
 	uplinkCounter   stats.Counter
 	downlinkCounter stats.Counter
 
@@ -297,7 +299,7 @@ func (w *udpWorker) callback(b *buf.Buffer, source net.Destination, originalDest
 		common.Must(w.checker.Start())
 
 		go func() {
-			ctx := context.Background()
+			ctx := w.ctx
 			sid := session.NewID()
 			ctx = session.ContextWithID(ctx, sid)
 
@@ -311,6 +313,13 @@ func (w *udpWorker) callback(b *buf.Buffer, source net.Destination, originalDest
 				Gateway: net.UDPDestination(w.address, w.port),
 				Tag:     w.tag,
 			})
+			content := new(session.Content)
+			if w.sniffingConfig != nil {
+				content.SniffingRequest.Enabled = w.sniffingConfig.Enabled
+				content.SniffingRequest.OverrideDestinationForProtocol = w.sniffingConfig.DestinationOverride
+				content.SniffingRequest.MetadataOnly = w.sniffingConfig.MetadataOnly
+			}
+			ctx = session.ContextWithContent(ctx, content)
 			if err := w.proxy.Process(ctx, net.Network_UDP, conn, w.dispatcher); err != nil {
 				newError("connection ends").Base(err).WriteToLog(session.ExportIDToError(ctx))
 			}
@@ -451,6 +460,7 @@ func (w *dsWorker) callback(conn internet.Connection) {
 		content.SniffingRequest.Enabled = w.sniffingConfig.Enabled
 		content.SniffingRequest.OverrideDestinationForProtocol = w.sniffingConfig.DestinationOverride
 		content.SniffingRequest.ExcludeForDomain = w.sniffingConfig.DomainsExcluded
+		content.SniffingRequest.MetadataOnly = w.sniffingConfig.MetadataOnly
 	}
 	ctx = session.ContextWithContent(ctx, content)
 

app/router/router_test.go

@@ -9,6 +9,7 @@ import (
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/outbound"
 	routing_session "github.com/xtls/xray-core/features/routing/session"
 	"github.com/xtls/xray-core/testing/mocks"
@@ -115,7 +116,11 @@ func TestIPOnDemand(t *testing.T) {
 	defer mockCtl.Finish()
 
 	mockDNS := mocks.NewDNSClient(mockCtl)
-	mockDNS.EXPECT().LookupIP(gomock.Eq("example.com")).Return([]net.IP{{192, 168, 0, 1}}, nil).AnyTimes()
+	mockDNS.EXPECT().LookupIP(gomock.Eq("example.com"), dns.IPOption{
+		IPv4Enable: true,
+		IPv6Enable: true,
+		FakeEnable: false,
+	}).Return([]net.IP{{192, 168, 0, 1}}, nil).AnyTimes()
 
 	r := new(Router)
 	common.Must(r.Init(config, mockDNS, nil))
@@ -150,7 +155,11 @@ func TestIPIfNonMatchDomain(t *testing.T) {
 	defer mockCtl.Finish()
 
 	mockDNS := mocks.NewDNSClient(mockCtl)
-	mockDNS.EXPECT().LookupIP(gomock.Eq("example.com")).Return([]net.IP{{192, 168, 0, 1}}, nil).AnyTimes()
+	mockDNS.EXPECT().LookupIP(gomock.Eq("example.com"), dns.IPOption{
+		IPv4Enable: true,
+		IPv6Enable: true,
+		FakeEnable: false,
+	}).Return([]net.IP{{192, 168, 0, 1}}, nil).AnyTimes()
 
 	r := new(Router)
 	common.Must(r.Init(config, mockDNS, nil))

common/buf/buffer.go

@@ -31,6 +31,22 @@ func New() *Buffer {
 	}
 }
 
+func NewExisted(b []byte) *Buffer {
+	if cap(b) < Size {
+		panic("Invalid buffer")
+	}
+
+	oLen := len(b)
+	if oLen < Size {
+		b = append(b, make([]byte, Size-oLen)...)
+	}
+
+	return &Buffer{
+		v:   b,
+		end: int32(oLen),
+	}
+}
+
 // StackNew creates a new Buffer object on stack.
 // This method is for buffers that is released in the same function.
 func StackNew() Buffer {

common/cache/lru.go

@@ -0,0 +1,85 @@
+package cache
+
+import (
+	"container/list"
+	sync "sync"
+)
+
+// Lru simple, fast lru cache implementation
+type Lru interface {
+	Get(key interface{}) (value interface{}, ok bool)
+	GetKeyFromValue(value interface{}) (key interface{}, ok bool)
+	PeekKeyFromValue(value interface{}) (key interface{}, ok bool) // Peek means check but NOT bring to top
+	Put(key, value interface{})
+}
+
+type lru struct {
+	capacity         int
+	doubleLinkedlist *list.List
+	keyToElement     *sync.Map
+	valueToElement   *sync.Map
+	mu               *sync.Mutex
+}
+
+type lruElement struct {
+	key   interface{}
+	value interface{}
+}
+
+// NewLru init a lru cache
+func NewLru(cap int) Lru {
+	return lru{
+		capacity:         cap,
+		doubleLinkedlist: list.New(),
+		keyToElement:     new(sync.Map),
+		valueToElement:   new(sync.Map),
+		mu:               new(sync.Mutex),
+	}
+}
+
+func (l lru) Get(key interface{}) (value interface{}, ok bool) {
+	if v, ok := l.keyToElement.Load(key); ok {
+		element := v.(*list.Element)
+		l.doubleLinkedlist.MoveBefore(element, l.doubleLinkedlist.Front())
+		return element.Value.(lruElement).value, true
+	}
+	return nil, false
+}
+
+func (l lru) GetKeyFromValue(value interface{}) (key interface{}, ok bool) {
+	if k, ok := l.valueToElement.Load(value); ok {
+		element := k.(*list.Element)
+		l.doubleLinkedlist.MoveBefore(element, l.doubleLinkedlist.Front())
+		return element.Value.(lruElement).key, true
+	}
+	return nil, false
+}
+
+func (l lru) PeekKeyFromValue(value interface{}) (key interface{}, ok bool) {
+	if k, ok := l.valueToElement.Load(value); ok {
+		element := k.(*list.Element)
+		return element.Value.(lruElement).key, true
+	}
+	return nil, false
+}
+
+func (l lru) Put(key, value interface{}) {
+	e := lruElement{key, value}
+	if v, ok := l.keyToElement.Load(key); ok {
+		element := v.(*list.Element)
+		element.Value = e
+		l.doubleLinkedlist.MoveBefore(element, l.doubleLinkedlist.Front())
+	} else {
+		l.mu.Lock()
+		element := l.doubleLinkedlist.PushFront(e)
+		l.keyToElement.Store(key, element)
+		l.valueToElement.Store(value, element)
+		if l.doubleLinkedlist.Len() > l.capacity {
+			toBeRemove := l.doubleLinkedlist.Back()
+			l.doubleLinkedlist.Remove(toBeRemove)
+			l.keyToElement.Delete(toBeRemove.Value.(lruElement).key)
+			l.valueToElement.Delete(toBeRemove.Value.(lruElement).value)
+		}
+		l.mu.Unlock()
+	}
+}

common/cache/lru_test.go

@@ -0,0 +1,86 @@
+package cache_test
+
+import (
+	"testing"
+
+	. "github.com/xtls/xray-core/common/cache"
+)
+
+func TestLruReplaceValue(t *testing.T) {
+	lru := NewLru(2)
+	lru.Put(2, 6)
+	lru.Put(1, 5)
+	lru.Put(1, 2)
+	v, _ := lru.Get(1)
+	if v != 2 {
+		t.Error("should get 2", v)
+	}
+	v, _ = lru.Get(2)
+	if v != 6 {
+		t.Error("should get 6", v)
+	}
+}
+
+func TestLruRemoveOld(t *testing.T) {
+	lru := NewLru(2)
+	v, ok := lru.Get(2)
+	if ok {
+		t.Error("should get nil", v)
+	}
+	lru.Put(1, 1)
+	lru.Put(2, 2)
+	v, _ = lru.Get(1)
+	if v != 1 {
+		t.Error("should get 1", v)
+	}
+	lru.Put(3, 3)
+	v, ok = lru.Get(2)
+	if ok {
+		t.Error("should get nil", v)
+	}
+	lru.Put(4, 4)
+	v, ok = lru.Get(1)
+	if ok {
+		t.Error("should get nil", v)
+	}
+	v, _ = lru.Get(3)
+	if v != 3 {
+		t.Error("should get 3", v)
+	}
+	v, _ = lru.Get(4)
+	if v != 4 {
+		t.Error("should get 4", v)
+	}
+}
+
+func TestGetKeyFromValue(t *testing.T) {
+	lru := NewLru(2)
+	lru.Put(3, 3)
+	lru.Put(2, 2)
+	lru.GetKeyFromValue(3)
+	lru.Put(1, 1)
+	v, ok := lru.GetKeyFromValue(2)
+	if ok {
+		t.Error("should get nil", v)
+	}
+	v, _ = lru.GetKeyFromValue(3)
+	if v != 3 {
+		t.Error("should get 3", v)
+	}
+}
+
+func TestPeekKeyFromValue(t *testing.T) {
+	lru := NewLru(2)
+	lru.Put(3, 3)
+	lru.Put(2, 2)
+	lru.PeekKeyFromValue(3)
+	lru.Put(1, 1)
+	v, ok := lru.PeekKeyFromValue(3)
+	if ok {
+		t.Error("should get nil", v)
+	}
+	v, _ = lru.PeekKeyFromValue(2)
+	if v != 2 {
+		t.Error("should get 2", v)
+	}
+}

common/errors/errors.go

@@ -40,10 +40,8 @@ func (err *Error) pkgPath() string {
 		return ""
 	}
 	path := reflect.TypeOf(err.pathObj).PkgPath()
-	for i := 0; i < len(path); i++ {
-		if path[i] == '/' {
-			return path[trim:]
-		}
+	if len(path) >= trim {
+		return path[trim:]
 	}
 	return path
 }

common/log/dns.go

@@ -0,0 +1,59 @@
+package log
+
+import (
+	"net"
+	"strings"
+	"time"
+)
+
+type DNSLog struct {
+	Server  string
+	Domain  string
+	Result  []net.IP
+	Status  dnsStatus
+	Elapsed time.Duration
+	Error   error
+}
+
+func (l *DNSLog) String() string {
+	builder := &strings.Builder{}
+
+	// Server got answer: domain -> [ip1, ip2] 23ms
+	builder.WriteString(l.Server)
+	builder.WriteString(" ")
+	builder.WriteString(string(l.Status))
+	builder.WriteString(" ")
+	builder.WriteString(l.Domain)
+	builder.WriteString(" -> [")
+	builder.WriteString(joinNetIP(l.Result))
+	builder.WriteString("]")
+
+	if l.Elapsed > 0 {
+		builder.WriteString(" ")
+		builder.WriteString(l.Elapsed.String())
+	}
+	if l.Error != nil {
+		builder.WriteString(" <")
+		builder.WriteString(l.Error.Error())
+		builder.WriteString(">")
+	}
+	return builder.String()
+}
+
+type dnsStatus string
+
+var (
+	DNSQueried  = dnsStatus("got answer:")
+	DNSCacheHit = dnsStatus("cache HIT:")
+)
+
+func joinNetIP(ips []net.IP) string {
+	if len(ips) == 0 {
+		return ""
+	}
+	sips := make([]string, 0, len(ips))
+	for _, ip := range ips {
+		sips = append(sips, ip.String())
+	}
+	return strings.Join(sips, ", ")
+}

common/protocol/headers.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc        v3.15.4
 // source: common/protocol/headers.proto
 
 package protocol
@@ -34,6 +34,7 @@ const (
 	SecurityType_AES128_GCM        SecurityType = 3
 	SecurityType_CHACHA20_POLY1305 SecurityType = 4
 	SecurityType_NONE              SecurityType = 5
+	SecurityType_ZERO              SecurityType = 6
 )
 
 // Enum value maps for SecurityType.
@@ -45,6 +46,7 @@ var (
 		3: "AES128_GCM",
 		4: "CHACHA20_POLY1305",
 		5: "NONE",
+		6: "ZERO",
 	}
 	SecurityType_value = map[string]int32{
 		"UNKNOWN":           0,
@@ -53,6 +55,7 @@ var (
 		"AES128_GCM":        3,
 		"CHACHA20_POLY1305": 4,
 		"NONE":              5,
+		"ZERO":              6,
 	}
 )
 
@@ -141,19 +144,20 @@ var file_common_protocol_headers_proto_rawDesc = []byte{
 	0x01, 0x20, 0x01, 0x28, 0x0e, 0x32, 0x22, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d,
 	0x6d, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x2e, 0x53, 0x65, 0x63,
 	0x75, 0x72, 0x69, 0x74, 0x79, 0x54, 0x79, 0x70, 0x65, 0x52, 0x04, 0x74, 0x79, 0x70, 0x65, 0x2a,
-	0x62, 0x0a, 0x0c, 0x53, 0x65, 0x63, 0x75, 0x72, 0x69, 0x74, 0x79, 0x54, 0x79, 0x70, 0x65, 0x12,
+	0x6c, 0x0a, 0x0c, 0x53, 0x65, 0x63, 0x75, 0x72, 0x69, 0x74, 0x79, 0x54, 0x79, 0x70, 0x65, 0x12,
 	0x0b, 0x0a, 0x07, 0x55, 0x4e, 0x4b, 0x4e, 0x4f, 0x57, 0x4e, 0x10, 0x00, 0x12, 0x0a, 0x0a, 0x06,
 	0x4c, 0x45, 0x47, 0x41, 0x43, 0x59, 0x10, 0x01, 0x12, 0x08, 0x0a, 0x04, 0x41, 0x55, 0x54, 0x4f,
 	0x10, 0x02, 0x12, 0x0e, 0x0a, 0x0a, 0x41, 0x45, 0x53, 0x31, 0x32, 0x38, 0x5f, 0x47, 0x43, 0x4d,
 	0x10, 0x03, 0x12, 0x15, 0x0a, 0x11, 0x43, 0x48, 0x41, 0x43, 0x48, 0x41, 0x32, 0x30, 0x5f, 0x50,
 	0x4f, 0x4c, 0x59, 0x31, 0x33, 0x30, 0x35, 0x10, 0x04, 0x12, 0x08, 0x0a, 0x04, 0x4e, 0x4f, 0x4e,
-	0x45, 0x10, 0x05, 0x42, 0x5e, 0x0a, 0x18, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e,
-	0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x50,
-	0x01, 0x5a, 0x29, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74,
-	0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x63, 0x6f, 0x6d,
-	0x6d, 0x6f, 0x6e, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0xaa, 0x02, 0x14, 0x58,
-	0x72, 0x61, 0x79, 0x2e, 0x43, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x50, 0x72, 0x6f, 0x74, 0x6f,
-	0x63, 0x6f, 0x6c, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x45, 0x10, 0x05, 0x12, 0x08, 0x0a, 0x04, 0x5a, 0x45, 0x52, 0x4f, 0x10, 0x06, 0x42, 0x5e, 0x0a,
+	0x18, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e,
+	0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x50, 0x01, 0x5a, 0x29, 0x67, 0x69, 0x74,
+	0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61,
+	0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2f, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0xaa, 0x02, 0x14, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x43, 0x6f,
+	0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x63, 0x6f, 0x6c, 0x62, 0x06, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

common/protocol/headers.proto

@@ -13,6 +13,7 @@ enum SecurityType {
   AES128_GCM = 3;
   CHACHA20_POLY1305 = 4;
   NONE = 5;
+  ZERO = 6;
 }
 
 message SecurityConfig {

common/session/session.go

@@ -63,6 +63,7 @@ type SniffingRequest struct {
 	ExcludeForDomain               []string
 	OverrideDestinationForProtocol []string
 	Enabled                        bool
+	MetadataOnly                   bool
 }
 
 // Content is the metadata of the connection content.

core/config.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
+// 	protoc        v3.15.6
 // source: core/config.proto
 
 package core
@@ -9,7 +9,7 @@ package core
 import (
 	proto "github.com/golang/protobuf/proto"
 	serial "github.com/xtls/xray-core/common/serial"
-	transport "github.com/xtls/xray-core/transport"
+	global "github.com/xtls/xray-core/transport/global"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -48,7 +48,7 @@ type Config struct {
 	// config. Date to remove: 2020-01-13
 	//
 	// Deprecated: Do not use.
-	Transport *transport.Config `protobuf:"bytes,5,opt,name=transport,proto3" json:"transport,omitempty"`
+	Transport *global.Config `protobuf:"bytes,5,opt,name=transport,proto3" json:"transport,omitempty"`
 	// Configuration for extensions. The config may not work if corresponding
 	// extension is not loaded into Xray. Xray will ignore such config during
 	// initialization.
@@ -109,7 +109,7 @@ func (x *Config) GetApp() []*serial.TypedMessage {
 }
 
 // Deprecated: Do not use.
-func (x *Config) GetTransport() *transport.Config {
+func (x *Config) GetTransport() *global.Config {
 	if x != nil {
 		return x.Transport
 	}
@@ -283,59 +283,60 @@ var file_core_config_proto_rawDesc = []byte{
 	0x6f, 0x74, 0x6f, 0x12, 0x09, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x72, 0x65, 0x1a, 0x21,
 	0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2f, 0x73, 0x65, 0x72, 0x69, 0x61, 0x6c, 0x2f, 0x74, 0x79,
 	0x70, 0x65, 0x64, 0x5f, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74,
-	0x6f, 0x1a, 0x16, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2f, 0x63, 0x6f, 0x6e,
-	0x66, 0x69, 0x67, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0xb5, 0x02, 0x0a, 0x06, 0x43, 0x6f,
-	0x6e, 0x66, 0x69, 0x67, 0x12, 0x39, 0x0a, 0x07, 0x69, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0x18,
-	0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x1f, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x63, 0x6f, 0x72,
-	0x65, 0x2e, 0x49, 0x6e, 0x62, 0x6f, 0x75, 0x6e, 0x64, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72,
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+	0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -356,7 +357,7 @@ var file_core_config_proto_goTypes = []interface{}{
 	(*InboundHandlerConfig)(nil),  // 1: xray.core.InboundHandlerConfig
 	(*OutboundHandlerConfig)(nil), // 2: xray.core.OutboundHandlerConfig
 	(*serial.TypedMessage)(nil),   // 3: xray.common.serial.TypedMessage
-	(*transport.Config)(nil),      // 4: xray.transport.Config
+	(*global.Config)(nil),         // 4: xray.transport.Config
 }
 var file_core_config_proto_depIdxs = []int32{
 	1, // 0: xray.core.Config.inbound:type_name -> xray.core.InboundHandlerConfig

core/config.proto

@@ -7,7 +7,7 @@ option java_package = "com.xray.core";
 option java_multiple_files = true;
 
 import "common/serial/typed_message.proto";
-import "transport/config.proto";
+import "transport/global/config.proto";
 
 // Config is the master config of Xray. Xray takes this config as input and
 // functions accordingly.

core/core.go

@@ -18,7 +18,7 @@ import (
 )
 
 var (
-	version  = "1.3.1"
+	version  = "1.4.0"
 	build    = "Custom"
 	codename = "Xray, Penetrates Everything."
 	intro    = "A unified platform for anti-censorship."

core/xray.go

@@ -16,6 +16,7 @@ import (
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/features/stats"
+	"github.com/xtls/xray-core/transport/internet"
 )
 
 // Server is an instance of Xray. At any time, there must be at most one Server instance running.
@@ -223,6 +224,14 @@ func initInstanceWithConfig(config *Config, server *Instance) (bool, error) {
 		}
 	}
 
+	internet.InitSystemDialer(
+		server.GetFeature(dns.ClientType()).(dns.Client),
+		func() outbound.Manager {
+			obm, _ := server.GetFeature(outbound.ManagerType()).(outbound.Manager)
+			return obm
+		}(),
+	)
+
 	if server.featureResolutions != nil {
 		return true, newError("not all dependency are resolved.")
 	}

features/dns/client.go

@@ -7,6 +7,13 @@ import (
 	"github.com/xtls/xray-core/features"
 )
 
+// IPOption is an object for IP query options.
+type IPOption struct {
+	IPv4Enable bool
+	IPv6Enable bool
+	FakeEnable bool
+}
+
 // Client is a Xray feature for querying DNS information.
 //
 // xray:api:stable
@@ -14,21 +21,7 @@ type Client interface {
 	features.Feature
 
 	// LookupIP returns IP address for the given domain. IPs may contain IPv4 and/or IPv6 addresses.
-	LookupIP(domain string) ([]net.IP, error)
-}
-
-// IPv4Lookup is an optional feature for querying IPv4 addresses only.
-//
-// xray:api:beta
-type IPv4Lookup interface {
-	LookupIPv4(domain string) ([]net.IP, error)
-}
-
-// IPv6Lookup is an optional feature for querying IPv6 addresses only.
-//
-// xray:api:beta
-type IPv6Lookup interface {
-	LookupIPv6(domain string) ([]net.IP, error)
+	LookupIP(domain string, option IPOption) ([]net.IP, error)
 }
 
 // ClientType returns the type of Client interface. Can be used for implementing common.HasType.

features/dns/fakedns.go

@@ -0,0 +1,17 @@
+package dns
+
+import (
+	gonet "net"
+
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/features"
+)
+
+type FakeDNSEngine interface {
+	features.Feature
+	GetFakeIPForDomain(domain string) []net.Address
+	GetDomainFromFakeDNS(ip net.Address) string
+	GetFakeIPRange() *gonet.IPNet
+}
+
+var FakeIPPool = "198.18.0.0/16"

features/dns/localdns/client.go

@@ -20,58 +20,41 @@ func (*Client) Start() error { return nil }
 func (*Client) Close() error { return nil }
 
 // LookupIP implements Client.
-func (*Client) LookupIP(host string) ([]net.IP, error) {
+func (*Client) LookupIP(host string, option dns.IPOption) ([]net.IP, error) {
 	ips, err := net.LookupIP(host)
 	if err != nil {
 		return nil, err
 	}
 	parsedIPs := make([]net.IP, 0, len(ips))
+	ipv4 := make([]net.IP, 0, len(ips))
+	ipv6 := make([]net.IP, 0, len(ips))
 	for _, ip := range ips {
 		parsed := net.IPAddress(ip)
 		if parsed != nil {
 			parsedIPs = append(parsedIPs, parsed.IP())
 		}
-	}
-	if len(parsedIPs) == 0 {
-		return nil, dns.ErrEmptyResponse
-	}
-	return parsedIPs, nil
-}
-
-// LookupIPv4 implements IPv4Lookup.
-func (c *Client) LookupIPv4(host string) ([]net.IP, error) {
-	ips, err := c.LookupIP(host)
-	if err != nil {
-		return nil, err
-	}
-	ipv4 := make([]net.IP, 0, len(ips))
-	for _, ip := range ips {
 		if len(ip) == net.IPv4len {
 			ipv4 = append(ipv4, ip)
 		}
-	}
-	if len(ipv4) == 0 {
-		return nil, dns.ErrEmptyResponse
-	}
-	return ipv4, nil
-}
-
-// LookupIPv6 implements IPv6Lookup.
-func (c *Client) LookupIPv6(host string) ([]net.IP, error) {
-	ips, err := c.LookupIP(host)
-	if err != nil {
-		return nil, err
-	}
-	ipv6 := make([]net.IP, 0, len(ips))
-	for _, ip := range ips {
 		if len(ip) == net.IPv6len {
 			ipv6 = append(ipv6, ip)
 		}
 	}
-	if len(ipv6) == 0 {
-		return nil, dns.ErrEmptyResponse
+	switch {
+	case option.IPv4Enable && option.IPv6Enable:
+		if len(parsedIPs) > 0 {
+			return parsedIPs, nil
+		}
+	case option.IPv4Enable:
+		if len(ipv4) > 0 {
+			return ipv4, nil
+		}
+	case option.IPv6Enable:
+		if len(ipv6) > 0 {
+			return ipv6, nil
+		}
 	}
-	return ipv6, nil
+	return nil, dns.ErrEmptyResponse
 }
 
 // New create a new dns.Client that queries localhost for DNS.

features/dns/localdns/errors.generated.go

@@ -0,0 +1,9 @@
+package localdns
+
+import "github.com/xtls/xray-core/common/errors"
+
+type errPathObjHolder struct{}
+
+func newError(values ...interface{}) *errors.Error {
+	return errors.New(values...).WithPathObj(errPathObjHolder{})
+}

features/routing/dns/context.go

@@ -26,7 +26,11 @@ func (ctx *ResolvableContext) GetTargetIPs() []net.IP {
 	}
 
 	if domain := ctx.GetTargetDomain(); len(domain) != 0 {
-		ips, err := ctx.dnsClient.LookupIP(domain)
+		ips, err := ctx.dnsClient.LookupIP(domain, dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: true,
+			FakeEnable: false,
+		})
 		if err == nil {
 			ctx.resolvedIPs = ips
 			return ips

go.mod

@@ -1,25 +1,25 @@
 module github.com/xtls/xray-core
 
-go 1.15
+go 1.16
 
 require (
 	github.com/ghodss/yaml v1.0.1-0.20190212211648-25d852aebe32
 	github.com/golang/mock v1.5.0
 	github.com/golang/protobuf v1.4.3
-	github.com/google/go-cmp v0.5.4
+	github.com/google/go-cmp v0.5.5
 	github.com/gorilla/websocket v1.4.2
 	github.com/lucas-clemente/quic-go v0.19.3
 	github.com/miekg/dns v1.1.40
 	github.com/pelletier/go-toml v1.8.1
-	github.com/pires/go-proxyproto v0.4.2
+	github.com/pires/go-proxyproto v0.5.0
 	github.com/seiflotfy/cuckoofilter v0.0.0-20201222105146-bc6005554a0c
 	github.com/stretchr/testify v1.7.0
 	github.com/xtls/go v0.0.0-20201118062508-3632bf3b7499
-	go.starlark.net v0.0.0-20210223155950-e043a3d3c984
+	go.starlark.net v0.0.0-20210312235212-74c10e2c17dc
 	golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83
 	golang.org/x/net v0.0.0-20210226172049-e18ecbb05110
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
-	golang.org/x/sys v0.0.0-20210301091718-77cc2087c03b
+	golang.org/x/sys v0.0.0-20210313202042-bd2e13477e9c
 	google.golang.org/grpc v1.36.0
 	google.golang.org/protobuf v1.25.0
 	h12.io/socks v1.0.2

go.sum

@@ -71,8 +71,8 @@ github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.1/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.4 h1:L8R9j+yAqZuZjsqh/z+F1NCffTKKLShY6zXTItVIZ8M=
-github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-github v17.0.0+incompatible/go.mod h1:zLgOLi98H3fifZn+44m+umXrS52loVEgC2AApnigrVQ=
 github.com/google/go-querystring v1.0.0/go.mod h1:odCYkC5MyYFN7vkCjXpyrEuKhc/BUO6wN/zVPAxq5ck=
 github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXiIaQGbYVAs8BPL6v8lEs=
@@ -129,8 +129,8 @@ github.com/pelletier/go-toml v1.8.1 h1:1Nf83orprkJyknT6h7zbuEGUEjcyVlCxSUGTENmNC
 github.com/pelletier/go-toml v1.8.1/go.mod h1:T2/BmBdy8dvIRq1a/8aqjN41wvWlN4lrapLU/GW4pbc=
 github.com/phayes/freeport v0.0.0-20180830031419-95f893ade6f2 h1:JhzVVoYvbOACxoUmOs6V/G4D5nPVUW73rKvXxP4XUJc=
 github.com/phayes/freeport v0.0.0-20180830031419-95f893ade6f2/go.mod h1:iIss55rKnNBTvrwdmkUpLnDpZoAHvWaiq5+iMmen4AE=
-github.com/pires/go-proxyproto v0.4.2 h1:VRAvsUCTrmiahoU5fqQqkbY0GWcJ1Q0F7b7CkFaipSU=
-github.com/pires/go-proxyproto v0.4.2/go.mod h1:Odh9VFOZJCf9G8cLW5o435Xf1J95Jw9Gw5rnCjcwzAY=
+github.com/pires/go-proxyproto v0.5.0 h1:A4Jv4ZCaV3AFJeGh5mGwkz4iuWUYMlQ7IoO/GTuSuLo=
+github.com/pires/go-proxyproto v0.5.0/go.mod h1:Odh9VFOZJCf9G8cLW5o435Xf1J95Jw9Gw5rnCjcwzAY=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
@@ -181,8 +181,8 @@ github.com/xtls/go v0.0.0-20201118062508-3632bf3b7499 h1:QHESTXtfgc1ABV+ArlbPVqU
 github.com/xtls/go v0.0.0-20201118062508-3632bf3b7499/go.mod h1:5TB2+k58gx4A4g2Nf5miSHNDF6CuAzHKpWBooLAshTs=
 go.opencensus.io v0.18.0/go.mod h1:vKdFvxhtzZ9onBp9VKHK8z/sRpBMnKAsufL7wlDrCOA=
 go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
-go.starlark.net v0.0.0-20210223155950-e043a3d3c984 h1:xwwDQW5We85NaTk2APgoN9202w/l0DVGp+GZMfsrh7s=
-go.starlark.net v0.0.0-20210223155950-e043a3d3c984/go.mod h1:t3mmBBPzAVvK0L0n1drDmrQsJ8FoIx4INCqVMTr/Zo0=
+go.starlark.net v0.0.0-20210312235212-74c10e2c17dc h1:pVkptfeOTFfx+zXZo7HEHN3d5LmhatBFvHdm/f2QnpY=
+go.starlark.net v0.0.0-20210312235212-74c10e2c17dc/go.mod h1:t3mmBBPzAVvK0L0n1drDmrQsJ8FoIx4INCqVMTr/Zo0=
 go4.org v0.0.0-20180809161055-417644f6feb5/go.mod h1:MkTOUMDaeVYJUOUsaDXIhWPZYa1yOyC1qaOBpL57BhE=
 golang.org/x/build v0.0.0-20190111050920-041ab4dc3f9d/go.mod h1:OWs+y06UdEOHN4y+MfF/py+xQ/tYqIWW03b70/CG9Rw=
 golang.org/x/crypto v0.0.0-20181030102418-4d3f4d9ffa16/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
@@ -246,8 +246,8 @@ golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200519105757-fe76b779f299/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210301091718-77cc2087c03b h1:kHlr0tATeLRMEiZJu5CknOw/E8V6h69sXXQFGoPtjcc=
-golang.org/x/sys v0.0.0-20210301091718-77cc2087c03b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210313202042-bd2e13477e9c h1:coiPEfMv+ThsjULRDygLrJVlNE1gDdL2g65s0LhV2os=
+golang.org/x/sys v0.0.0-20210313202042-bd2e13477e9c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

infra/conf/fakedns.go

@@ -0,0 +1,66 @@
+package conf
+
+import (
+	"github.com/golang/protobuf/proto"
+	"github.com/xtls/xray-core/app/dns/fakedns"
+	"github.com/xtls/xray-core/features/dns"
+)
+
+type FakeDNSConfig struct {
+	IPPool  string `json:"ipPool"`
+	LruSize int64  `json:"poolSize"`
+}
+
+func (f FakeDNSConfig) Build() (proto.Message, error) {
+	return &fakedns.FakeDnsPool{
+		IpPool:  f.IPPool,
+		LruSize: f.LruSize,
+	}, nil
+}
+
+type FakeDNSPostProcessingStage struct{}
+
+func (FakeDNSPostProcessingStage) Process(conf *Config) error {
+	var fakeDNSInUse bool
+
+	if conf.DNSConfig != nil {
+		for _, v := range conf.DNSConfig.Servers {
+			if v.Address.Family().IsDomain() {
+				if v.Address.Domain() == "fakedns" {
+					fakeDNSInUse = true
+				}
+			}
+		}
+	}
+
+	if fakeDNSInUse {
+		if conf.FakeDNS == nil {
+			// Add a Fake DNS Config if there is none
+			conf.FakeDNS = &FakeDNSConfig{
+				IPPool:  dns.FakeIPPool,
+				LruSize: 65535,
+			}
+		}
+		found := false
+		// Check if there is a Outbound with necessary sniffer on
+		var inbounds []InboundDetourConfig
+
+		if len(conf.InboundConfigs) > 0 {
+			inbounds = append(inbounds, conf.InboundConfigs...)
+		}
+		for _, v := range inbounds {
+			if v.SniffingConfig != nil && v.SniffingConfig.Enabled && v.SniffingConfig.DestOverride != nil {
+				for _, dov := range *v.SniffingConfig.DestOverride {
+					if dov == "fakedns" {
+						found = true
+					}
+				}
+			}
+		}
+		if !found {
+			newError("Defined Fake DNS but haven't enabled fake dns sniffing at any inbound.").AtWarning().WriteToLog()
+		}
+	}
+
+	return nil
+}

infra/conf/grpc.go

@@ -0,0 +1,16 @@
+package conf
+
+import (
+	"github.com/golang/protobuf/proto"
+
+	"github.com/xtls/xray-core/transport/internet/grpc"
+)
+
+type GRPCConfig struct {
+	ServiceName string `json:"serviceName"`
+	MultiMode   bool   `json:"multiMode"`
+}
+
+func (g GRPCConfig) Build() (proto.Message, error) {
+	return &grpc.Config{ServiceName: g.ServiceName, MultiMode: g.MultiMode}, nil
+}

infra/conf/init.go

@@ -0,0 +1,5 @@
+package conf
+
+func init() {
+	RegisterConfigureFilePostProcessingStage("FakeDNS", &FakeDNSPostProcessingStage{})
+}

infra/conf/lint.go

@@ -0,0 +1,23 @@
+package conf
+
+type ConfigureFilePostProcessingStage interface {
+	Process(conf *Config) error
+}
+
+var configureFilePostProcessingStages map[string]ConfigureFilePostProcessingStage
+
+func RegisterConfigureFilePostProcessingStage(name string, stage ConfigureFilePostProcessingStage) {
+	if configureFilePostProcessingStages == nil {
+		configureFilePostProcessingStages = make(map[string]ConfigureFilePostProcessingStage)
+	}
+	configureFilePostProcessingStages[name] = stage
+}
+
+func PostProcessConfigureFile(conf *Config) error {
+	for k, v := range configureFilePostProcessingStages {
+		if err := v.Process(conf); err != nil {
+			return newError("Rejected by Postprocessing Stage ", k).AtError().Base(err)
+		}
+	}
+	return nil
+}

infra/conf/log.go

@@ -19,6 +19,7 @@ type LogConfig struct {
 	AccessLog string `json:"access"`
 	ErrorLog  string `json:"error"`
 	LogLevel  string `json:"loglevel"`
+	DNSLog    bool   `json:"dnsLog"`
 }
 
 func (v *LogConfig) Build() *log.Config {
@@ -28,6 +29,7 @@ func (v *LogConfig) Build() *log.Config {
 	config := &log.Config{
 		ErrorLogType:  log.LogType_Console,
 		AccessLogType: log.LogType_Console,
+		EnableDnsLog:  v.DNSLog,
 	}
 
 	if v.AccessLog == "none" {

infra/conf/transport.go

@@ -2,7 +2,7 @@ package conf
 
 import (
 	"github.com/xtls/xray-core/common/serial"
-	"github.com/xtls/xray-core/transport"
+	"github.com/xtls/xray-core/transport/global"
 	"github.com/xtls/xray-core/transport/internet"
 )
 
@@ -13,11 +13,13 @@ type TransportConfig struct {
 	HTTPConfig *HTTPConfig         `json:"httpSettings"`
 	DSConfig   *DomainSocketConfig `json:"dsSettings"`
 	QUICConfig *QUICConfig         `json:"quicSettings"`
+	GRPCConfig *GRPCConfig         `json:"grpcSettings"`
+	GUNConfig  *GRPCConfig         `json:"gunSettings"`
 }
 
 // Build implements Buildable.
-func (c *TransportConfig) Build() (*transport.Config, error) {
-	config := new(transport.Config)
+func (c *TransportConfig) Build() (*global.Config, error) {
+	config := new(global.Config)
 
 	if c.TCPConfig != nil {
 		ts, err := c.TCPConfig.Build()
@@ -85,5 +87,19 @@ func (c *TransportConfig) Build() (*transport.Config, error) {
 		})
 	}
 
+	if c.GRPCConfig == nil {
+		c.GRPCConfig = c.GUNConfig
+	}
+	if c.GRPCConfig != nil {
+		gs, err := c.GRPCConfig.Build()
+		if err != nil {
+			return nil, newError("Failed to build gRPC config.").Base(err)
+		}
+		config.TransportSettings = append(config.TransportSettings, &internet.TransportConfig{
+			ProtocolName: "grpc",
+			Settings:     serial.ToTypedMessage(gs),
+		})
+	}
+
 	return config, nil
 }

infra/conf/transport_internet.go

@@ -2,6 +2,9 @@ package conf
 
 import (
 	"encoding/json"
+	"math"
+	"net/url"
+	"strconv"
 	"strings"
 
 	"github.com/golang/protobuf/proto"
@@ -154,9 +157,20 @@ func (c *WebSocketConfig) Build() (proto.Message, error) {
 			Value: value,
 		})
 	}
+	var ed uint32
+	if u, err := url.Parse(path); err == nil {
+		if q := u.Query(); q.Get("ed") != "" {
+			Ed, _ := strconv.Atoi(q.Get("ed"))
+			ed = uint32(Ed)
+			q.Del("ed")
+			u.RawQuery = q.Encode()
+			path = u.String()
+		}
+	}
 	config := &websocket.Config{
 		Path:   path,
 		Header: header,
+		Ed:     ed,
 	}
 	if c.AcceptProxyProtocol {
 		config.AcceptProxyProtocol = c.AcceptProxyProtocol
@@ -444,26 +458,40 @@ func (p TransportProtocol) Build() (string, error) {
 		return "domainsocket", nil
 	case "quic":
 		return "quic", nil
+	case "grpc", "gun":
+		return "grpc", nil
 	default:
 		return "", newError("Config: unknown transport protocol: ", p)
 	}
 }
 
 type SocketConfig struct {
-	Mark                int32  `json:"mark"`
-	TFO                 *bool  `json:"tcpFastOpen"`
-	TProxy              string `json:"tproxy"`
-	AcceptProxyProtocol bool   `json:"acceptProxyProtocol"`
+	Mark                int32       `json:"mark"`
+	TFO                 interface{} `json:"tcpFastOpen"`
+	TProxy              string      `json:"tproxy"`
+	AcceptProxyProtocol bool        `json:"acceptProxyProtocol"`
+	DomainStrategy      string      `json:"domainStrategy"`
+	DialerProxy         string      `json:"dialerProxy"`
 }
 
 // Build implements Buildable.
 func (c *SocketConfig) Build() (*internet.SocketConfig, error) {
-	var tfoSettings internet.SocketConfig_TCPFastOpenState
+	tfo := int32(-1)
 	if c.TFO != nil {
-		if *c.TFO {
-			tfoSettings = internet.SocketConfig_Enable
-		} else {
-			tfoSettings = internet.SocketConfig_Disable
+		switch v := c.TFO.(type) {
+		case bool:
+			if v {
+				tfo = 256
+			} else {
+				tfo = 0
+			}
+		case float64:
+			if v < 0 {
+				return nil, newError("tcpFastOpen: only boolean and non-negative integer value is acceptable")
+			}
+			tfo = int32(math.Min(v, math.MaxInt32))
+		default:
+			return nil, newError("tcpFastOpen: only boolean and non-negative integer value is acceptable")
 		}
 	}
 	var tproxy internet.SocketConfig_TProxyMode
@@ -476,11 +504,23 @@ func (c *SocketConfig) Build() (*internet.SocketConfig, error) {
 		tproxy = internet.SocketConfig_Off
 	}
 
+	var dStrategy = internet.DomainStrategy_AS_IS
+	switch strings.ToLower(c.DomainStrategy) {
+	case "useip", "use_ip":
+		dStrategy = internet.DomainStrategy_USE_IP
+	case "useip4", "useipv4", "use_ipv4", "use_ip_v4", "use_ip4":
+		dStrategy = internet.DomainStrategy_USE_IP4
+	case "useip6", "useipv6", "use_ipv6", "use_ip_v6", "use_ip6":
+		dStrategy = internet.DomainStrategy_USE_IP6
+	}
+
 	return &internet.SocketConfig{
 		Mark:                c.Mark,
-		Tfo:                 tfoSettings,
+		Tfo:                 tfo,
 		Tproxy:              tproxy,
+		DomainStrategy:      dStrategy,
 		AcceptProxyProtocol: c.AcceptProxyProtocol,
+		DialerProxy:         c.DialerProxy,
 	}, nil
 }
 
@@ -496,6 +536,8 @@ type StreamConfig struct {
 	DSSettings     *DomainSocketConfig `json:"dsSettings"`
 	QUICSettings   *QUICConfig         `json:"quicSettings"`
 	SocketSettings *SocketConfig       `json:"sockopt"`
+	GRPCConfig     *GRPCConfig         `json:"grpcSettings"`
+	GUNConfig      *GRPCConfig         `json:"gunSettings"`
 }
 
 // Build implements Buildable.
@@ -605,6 +647,19 @@ func (c *StreamConfig) Build() (*internet.StreamConfig, error) {
 			Settings:     serial.ToTypedMessage(qs),
 		})
 	}
+	if c.GRPCConfig == nil {
+		c.GRPCConfig = c.GUNConfig
+	}
+	if c.GRPCConfig != nil {
+		gs, err := c.GRPCConfig.Build()
+		if err != nil {
+			return nil, newError("Failed to build gRPC config.").Base(err)
+		}
+		config.TransportSettings = append(config.TransportSettings, &internet.TransportConfig{
+			ProtocolName: "grpc",
+			Settings:     serial.ToTypedMessage(gs),
+		})
+	}
 	if c.SocketSettings != nil {
 		ss, err := c.SocketSettings.Build()
 		if err != nil {
@@ -617,6 +672,9 @@ func (c *StreamConfig) Build() (*internet.StreamConfig, error) {
 
 type ProxyConfig struct {
 	Tag string `json:"tag"`
+
+	// TransportLayerProxy: For compatibility.
+	TransportLayerProxy bool `json:"transportLayer"`
 }
 
 // Build implements Buildable.
@@ -625,6 +683,7 @@ func (v *ProxyConfig) Build() (*internet.ProxyConfig, error) {
 		return nil, newError("Proxy tag is not set.")
 	}
 	return &internet.ProxyConfig{
-		Tag: v.Tag,
+		Tag:                 v.Tag,
+		TransportLayerProxy: v.TransportLayerProxy,
 	}, nil
 }

infra/conf/transport_test.go

@@ -8,8 +8,9 @@ import (
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/common/serial"
 	. "github.com/xtls/xray-core/infra/conf"
-	"github.com/xtls/xray-core/transport"
+	"github.com/xtls/xray-core/transport/global"
 	"github.com/xtls/xray-core/transport/internet"
+	"github.com/xtls/xray-core/transport/internet/grpc"
 	"github.com/xtls/xray-core/transport/internet/headers/http"
 	"github.com/xtls/xray-core/transport/internet/headers/noop"
 	"github.com/xtls/xray-core/transport/internet/headers/tls"
@@ -34,12 +35,40 @@ func TestSocketConfig(t *testing.T) {
 		{
 			Input: `{
 				"mark": 1,
-				"tcpFastOpen": true
+				"tcpFastOpen": true,
+				"domainStrategy": "UseIP",
+				"dialerProxy": "tag"
 			}`,
 			Parser: createParser(),
 			Output: &internet.SocketConfig{
-				Mark: 1,
-				Tfo:  internet.SocketConfig_Enable,
+				Mark:           1,
+				Tfo:            256,
+				DomainStrategy: internet.DomainStrategy_USE_IP,
+				DialerProxy:    "tag",
+			},
+		},
+	})
+	runMultiTestCase(t, []TestCase{
+		{
+			Input: `{
+				"tcpFastOpen": false
+			}`,
+			Parser: createParser(),
+			Output: &internet.SocketConfig{
+				Mark: 0,
+				Tfo:  0,
+			},
+		},
+	})
+	runMultiTestCase(t, []TestCase{
+		{
+			Input: `{
+				"tcpFastOpen": 65535
+			}`,
+			Parser: createParser(),
+			Output: &internet.SocketConfig{
+				Mark: 0,
+				Tfo:  65535,
 			},
 		},
 	})
@@ -92,10 +121,14 @@ func TestTransportConfig(t *testing.T) {
 					"header": {
 						"type": "dtls"
 					}
+				},
+				"grpcSettings": {
+					"serviceName": "name",
+					"multiMode": true
 				}
 			}`,
 			Parser: createParser(),
-			Output: &transport.Config{
+			Output: &global.Config{
 				TransportSettings: []*internet.TransportConfig{
 					{
 						ProtocolName: "tcp",
@@ -162,6 +195,31 @@ func TestTransportConfig(t *testing.T) {
 							Header: serial.ToTypedMessage(&tls.PacketConfig{}),
 						}),
 					},
+					{
+						ProtocolName: "grpc",
+						Settings: serial.ToTypedMessage(&grpc.Config{
+							ServiceName: "name",
+							MultiMode:   true,
+						}),
+					},
+				},
+			},
+		},
+		{
+			Input: `{
+				"gunSettings": {
+					"serviceName": "name"
+				}
+			}`,
+			Parser: createParser(),
+			Output: &global.Config{
+				TransportSettings: []*internet.TransportConfig{
+					{
+						ProtocolName: "grpc",
+						Settings: serial.ToTypedMessage(&grpc.Config{
+							ServiceName: "name",
+						}),
+					},
 				},
 			},
 		},

infra/conf/trojan.go

@@ -104,7 +104,7 @@ type TrojanUserConfig struct {
 // TrojanServerConfig is Inbound configuration
 type TrojanServerConfig struct {
 	Clients   []*TrojanUserConfig      `json:"clients"`
-	Fallback  json.RawMessage          `json:"fallback"`
+	Fallback  *TrojanInboundFallback   `json:"fallback"`
 	Fallbacks []*TrojanInboundFallback `json:"fallbacks"`
 }
 

infra/conf/vless.go

@@ -29,7 +29,7 @@ type VLessInboundFallback struct {
 type VLessInboundConfig struct {
 	Clients    []json.RawMessage       `json:"clients"`
 	Decryption string                  `json:"decryption"`
-	Fallback   json.RawMessage         `json:"fallback"`
+	Fallback   *VLessInboundFallback   `json:"fallback"`
 	Fallbacks  []*VLessInboundFallback `json:"fallbacks"`
 }
 

infra/conf/vmess.go

@@ -32,6 +32,8 @@ func (a *VMessAccount) Build() *vmess.Account {
 		st = protocol.SecurityType_AUTO
 	case "none":
 		st = protocol.SecurityType_NONE
+	case "zero":
+		st = protocol.SecurityType_ZERO
 	default:
 		st = protocol.SecurityType_AUTO
 	}

infra/conf/xray.go

@@ -2,6 +2,7 @@ package conf
 
 import (
 	"encoding/json"
+	"github.com/xtls/xray-core/transport/internet"
 	"log"
 	"os"
 	"strings"
@@ -61,6 +62,7 @@ type SniffingConfig struct {
 	Enabled         bool        `json:"enabled"`
 	DestOverride    *StringList `json:"destOverride"`
 	DomainsExcluded *StringList `json:"domainsExcluded"`
+	MetadataOnly    bool        `json:"metadataOnly"`
 }
 
 // Build implements Buildable.
@@ -73,6 +75,8 @@ func (c *SniffingConfig) Build() (*proxyman.SniffingConfig, error) {
 				p = append(p, "http")
 			case "tls", "https", "ssl":
 				p = append(p, "tls")
+			case "fakedns":
+				p = append(p, "fakedns")
 			default:
 				return nil, newError("unknown protocol: ", protocol)
 			}
@@ -90,6 +94,7 @@ func (c *SniffingConfig) Build() (*proxyman.SniffingConfig, error) {
 		Enabled:             c.Enabled,
 		DestinationOverride: p,
 		DomainsExcluded:     d,
+		MetadataOnly:        c.MetadataOnly,
 	}, nil
 }
 
@@ -267,9 +272,22 @@ type OutboundDetourConfig struct {
 	MuxSettings   *MuxConfig       `json:"mux"`
 }
 
+func (c *OutboundDetourConfig) checkChainProxyConfig() error {
+	if c.StreamSetting == nil || c.ProxySettings == nil || c.StreamSetting.SocketSettings == nil {
+		return nil
+	}
+	if len(c.ProxySettings.Tag) > 0 && len(c.StreamSetting.SocketSettings.DialerProxy) > 0 {
+		return newError("proxySettings.tag is conflicted with sockopt.dialerProxy").AtWarning()
+	}
+	return nil
+}
+
 // Build implements Buildable.
 func (c *OutboundDetourConfig) Build() (*core.OutboundHandlerConfig, error) {
 	senderSettings := &proxyman.SenderConfig{}
+	if err := c.checkChainProxyConfig(); err != nil {
+		return nil, err
+	}
 
 	if c.SendThrough != nil {
 		address := c.SendThrough
@@ -295,6 +313,18 @@ func (c *OutboundDetourConfig) Build() (*core.OutboundHandlerConfig, error) {
 		if err != nil {
 			return nil, newError("invalid outbound detour proxy settings.").Base(err)
 		}
+		if ps.TransportLayerProxy {
+			if senderSettings.StreamSettings != nil {
+				if senderSettings.StreamSettings.SocketSettings != nil {
+					senderSettings.StreamSettings.SocketSettings.DialerProxy = ps.Tag
+				} else {
+					senderSettings.StreamSettings.SocketSettings = &internet.SocketConfig{DialerProxy: ps.Tag}
+				}
+			} else {
+				senderSettings.StreamSettings = &internet.StreamConfig{SocketSettings: &internet.SocketConfig{DialerProxy: ps.Tag}}
+			}
+			ps = nil
+		}
 		senderSettings.ProxySettings = ps
 	}
 
@@ -369,6 +399,7 @@ type Config struct {
 	API             *APIConfig             `json:"api"`
 	Stats           *StatsConfig           `json:"stats"`
 	Reverse         *ReverseConfig         `json:"reverse"`
+	FakeDNS         *FakeDNSConfig         `json:"fakeDns"`
 }
 
 func (c *Config) findInboundTag(tag string) int {
@@ -422,6 +453,10 @@ func (c *Config) Override(o *Config, fn string) {
 		c.Reverse = o.Reverse
 	}
 
+	if o.FakeDNS != nil {
+		c.FakeDNS = o.FakeDNS
+	}
+
 	// deprecated attrs... keep them for now
 	if o.InboundConfig != nil {
 		c.InboundConfig = o.InboundConfig
@@ -493,6 +528,10 @@ func applyTransportConfig(s *StreamConfig, t *TransportConfig) {
 
 // Build implements Buildable.
 func (c *Config) Build() (*core.Config, error) {
+	if err := PostProcessConfigureFile(c); err != nil {
+		return nil, err
+	}
+
 	config := &core.Config{
 		App: []*serial.TypedMessage{
 			serial.ToTypedMessage(&dispatcher.Config{}),
@@ -559,6 +598,14 @@ func (c *Config) Build() (*core.Config, error) {
 		config.App = append(config.App, serial.ToTypedMessage(r))
 	}
 
+	if c.FakeDNS != nil {
+		r, err := c.FakeDNS.Build()
+		if err != nil {
+			return nil, err
+		}
+		config.App = append(config.App, serial.ToTypedMessage(r))
+	}
+
 	var inbounds []InboundDetourConfig
 
 	if c.InboundConfig != nil {

main/distro/all/all.go

@@ -16,6 +16,7 @@ import (
 
 	// Other optional features.
 	_ "github.com/xtls/xray-core/app/dns"
+	_ "github.com/xtls/xray-core/app/dns/fakedns"
 	_ "github.com/xtls/xray-core/app/log"
 	_ "github.com/xtls/xray-core/app/policy"
 	_ "github.com/xtls/xray-core/app/reverse"
@@ -39,6 +40,7 @@ import (
 
 	// Transports
 	_ "github.com/xtls/xray-core/transport/internet/domainsocket"
+	_ "github.com/xtls/xray-core/transport/internet/grpc"
 	_ "github.com/xtls/xray-core/transport/internet/http"
 	_ "github.com/xtls/xray-core/transport/internet/kcp"
 	_ "github.com/xtls/xray-core/transport/internet/quic"

proxy/dns/dns.go

@@ -36,25 +36,13 @@ type ownLinkVerifier interface {
 }
 
 type Handler struct {
-	ipv4Lookup      dns.IPv4Lookup
-	ipv6Lookup      dns.IPv6Lookup
+	client          dns.Client
 	ownLinkVerifier ownLinkVerifier
 	server          net.Destination
 }
 
 func (h *Handler) Init(config *Config, dnsClient dns.Client) error {
-	ipv4lookup, ok := dnsClient.(dns.IPv4Lookup)
-	if !ok {
-		return newError("dns.Client doesn't implement IPv4Lookup")
-	}
-	h.ipv4Lookup = ipv4lookup
-
-	ipv6lookup, ok := dnsClient.(dns.IPv6Lookup)
-	if !ok {
-		return newError("dns.Client doesn't implement IPv6Lookup")
-	}
-	h.ipv6Lookup = ipv6lookup
-
+	h.client = dnsClient
 	if v, ok := dnsClient.(ownLinkVerifier); ok {
 		h.ownLinkVerifier = v
 	}
@@ -209,11 +197,21 @@ func (h *Handler) handleIPQuery(id uint16, qType dnsmessage.Type, domain string,
 	var ips []net.IP
 	var err error
 
+	var ttl uint32 = 600
+
 	switch qType {
 	case dnsmessage.TypeA:
-		ips, err = h.ipv4Lookup.LookupIPv4(domain)
+		ips, err = h.client.LookupIP(domain, dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: false,
+			FakeEnable: true,
+		})
 	case dnsmessage.TypeAAAA:
-		ips, err = h.ipv6Lookup.LookupIPv6(domain)
+		ips, err = h.client.LookupIP(domain, dns.IPOption{
+			IPv4Enable: false,
+			IPv6Enable: true,
+			FakeEnable: true,
+		})
 	}
 
 	rcode := dns.RCodeFromError(err)
@@ -241,7 +239,7 @@ func (h *Handler) handleIPQuery(id uint16, qType dnsmessage.Type, domain string,
 	}))
 	common.Must(builder.StartAnswers())
 
-	rHeader := dnsmessage.ResourceHeader{Name: dnsmessage.MustNewName(domain), Class: dnsmessage.ClassINET, TTL: 600}
+	rHeader := dnsmessage.ResourceHeader{Name: dnsmessage.MustNewName(domain), Class: dnsmessage.ClassINET, TTL: ttl}
 	for _, ip := range ips {
 		if len(ip) == net.IPv4len {
 			var r dnsmessage.AResource

proxy/freedom/freedom.go

@@ -59,19 +59,26 @@ func (h *Handler) policy() policy.Session {
 }
 
 func (h *Handler) resolveIP(ctx context.Context, domain string, localAddr net.Address) net.Address {
-	var lookupFunc func(string) ([]net.IP, error) = h.dns.LookupIP
-
+	var option dns.IPOption = dns.IPOption{
+		IPv4Enable: true,
+		IPv6Enable: true,
+		FakeEnable: false,
+	}
 	if h.config.DomainStrategy == Config_USE_IP4 || (localAddr != nil && localAddr.Family().IsIPv4()) {
-		if lookupIPv4, ok := h.dns.(dns.IPv4Lookup); ok {
-			lookupFunc = lookupIPv4.LookupIPv4
+		option = dns.IPOption{
+			IPv4Enable: true,
+			IPv6Enable: false,
+			FakeEnable: false,
 		}
 	} else if h.config.DomainStrategy == Config_USE_IP6 || (localAddr != nil && localAddr.Family().IsIPv6()) {
-		if lookupIPv6, ok := h.dns.(dns.IPv6Lookup); ok {
-			lookupFunc = lookupIPv6.LookupIPv6
+		option = dns.IPOption{
+			IPv4Enable: false,
+			IPv6Enable: true,
+			FakeEnable: false,
 		}
 	}
 
-	ips, err := lookupFunc(domain)
+	ips, err := h.dns.LookupIP(domain, option)
 	if err != nil {
 		newError("failed to get IP address for domain ", domain).Base(err).WriteToLog(session.ExportIDToError(ctx))
 	}
@@ -125,7 +132,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 					Address: ip,
 					Port:    dialDest.Port,
 				}
-				newError("dialing to to ", dialDest).WriteToLog(session.ExportIDToError(ctx))
+				newError("dialing to ", dialDest).WriteToLog(session.ExportIDToError(ctx))
 			}
 		}
 
@@ -169,7 +176,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 		if destination.Network == net.Network_TCP {
 			reader = buf.NewReader(conn)
 		} else {
-			reader = NewPacketReader(conn)
+			reader = NewPacketReader(conn, UDPOverride)
 		}
 		if err := buf.Copy(reader, output, buf.UpdateActivity(timer)); err != nil {
 			return newError("failed to process response").Base(err)
@@ -185,7 +192,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 	return nil
 }
 
-func NewPacketReader(conn net.Conn) buf.Reader {
+func NewPacketReader(conn net.Conn, UDPOverride net.Destination) buf.Reader {
 	iConn := conn
 	statConn, ok := iConn.(*internet.StatCouterConnection)
 	if ok {
@@ -195,7 +202,7 @@ func NewPacketReader(conn net.Conn) buf.Reader {
 	if statConn != nil {
 		counter = statConn.ReadCounter
 	}
-	if c, ok := iConn.(*internet.PacketConnWrapper); ok {
+	if c, ok := iConn.(*internet.PacketConnWrapper); ok && UDPOverride.Address == nil && UDPOverride.Port == 0 {
 		return &PacketReader{
 			PacketConnWrapper: c,
 			Counter:           counter,

proxy/trojan/server.go

@@ -458,7 +458,7 @@ func (s *Server) fallback(ctx context.Context, sid errors.ExportOption, err erro
 						if k == '\r' || k == '\n' { // avoid logging \r or \n
 							break
 						}
-						if k == ' ' {
+						if k == '?' || k == ' ' {
 							path = string(firstBytes[i:j])
 							newError("realPath = " + path).AtInfo().WriteToLog(sid)
 							if pfb[path] == nil {

proxy/vless/inbound/inbound.go

@@ -293,7 +293,7 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection i
 								if k == '\r' || k == '\n' { // avoid logging \r or \n
 									break
 								}
-								if k == ' ' {
+								if k == '?' || k == ' ' {
 									path = string(firstBytes[i:j])
 									newError("realPath = " + path).AtInfo().WriteToLog(sid)
 									if pfb[path] == nil {

proxy/vless/outbound/outbound.go

@@ -178,7 +178,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 	clientReader := link.Reader // .(*pipe.Reader)
 	clientWriter := link.Writer // .(*pipe.Writer)
 
-	if request.Command == protocol.RequestCommandUDP && h.cone {
+	if request.Command == protocol.RequestCommandUDP && h.cone && request.Port != 53 && request.Port != 443 {
 		request.Command = protocol.RequestCommandMux
 		request.Address = net.DomainAddress("v1.mux.cool")
 		request.Port = net.Port(666)

proxy/vmess/encoding/server.go

@@ -118,6 +118,11 @@ func NewServerSession(validator *vmess.TimedUserValidator, sessionHistory *Sessi
 	}
 }
 
+// SetAEADForced sets isAEADForced for a ServerSession.
+func (s *ServerSession) SetAEADForced(isAEADForced bool) {
+	s.isAEADForced = isAEADForced
+}
+
 func parseSecurityType(b byte) protocol.SecurityType {
 	if _, f := protocol.SecurityType_name[int32(b)]; f {
 		st := protocol.SecurityType(b)

proxy/vmess/inbound/inbound.go

@@ -14,6 +14,7 @@ import (
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/log"
 	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/platform"
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/common/session"
 	"github.com/xtls/xray-core/common/signal"
@@ -28,6 +29,10 @@ import (
 	"github.com/xtls/xray-core/transport/internet"
 )
 
+var (
+	aeadForced = false
+)
+
 type userByEmail struct {
 	sync.Mutex
 	cache           map[string]*protocol.MemoryUser
@@ -231,6 +236,7 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection i
 
 	reader := &buf.BufferedReader{Reader: buf.NewReader(connection)}
 	svrSession := encoding.NewServerSession(h.clients, h.sessionHistory)
+	svrSession.SetAEADForced(aeadForced)
 	request, err := svrSession.DecodeRequestHeader(reader, isDrain)
 	if err != nil {
 		if errors.Cause(err) != io.EOF {
@@ -361,4 +367,9 @@ func init() {
 	common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
 		return New(ctx, config.(*Config))
 	}))
+
+	const defaultFlagValue = "NOT_DEFINED_AT_ALL"
+
+	isAeadForced := platform.NewEnvFlag("xray.vmess.aead.forced").GetValue(func() string { return defaultFlagValue })
+	aeadForced = (isAeadForced == "true")
 }

proxy/vmess/outbound/outbound.go

@@ -111,6 +111,12 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 		request.Option.Set(protocol.RequestOptionGlobalPadding)
 	}
 
+	if request.Security == protocol.SecurityType_ZERO {
+		request.Security = protocol.SecurityType_NONE
+		request.Option.Clear(protocol.RequestOptionChunkStream)
+		request.Option.Clear(protocol.RequestOptionChunkMasking)
+	}
+
 	input := link.Reader
 	output := link.Writer
 
@@ -125,7 +131,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 	ctx, cancel := context.WithCancel(ctx)
 	timer := signal.CancelAfterInactivity(ctx, cancel, sessionPolicy.Timeouts.ConnectionIdle)
 
-	if request.Command == protocol.RequestCommandUDP && h.cone {
+	if request.Command == protocol.RequestCommandUDP && h.cone && request.Port != 53 && request.Port != 443 {
 		request.Command = protocol.RequestCommandMux
 		request.Address = net.DomainAddress("v1.mux.cool")
 		request.Port = net.Port(666)

testing/mocks/dns.go

@@ -6,6 +6,7 @@ package mocks
 
 import (
 	gomock "github.com/golang/mock/gomock"
+	dns "github.com/xtls/xray-core/features/dns"
 	net "net"
 	reflect "reflect"
 )
@@ -48,18 +49,18 @@ func (mr *DNSClientMockRecorder) Close() *gomock.Call {
 }
 
 // LookupIP mocks base method
-func (m *DNSClient) LookupIP(arg0 string) ([]net.IP, error) {
+func (m *DNSClient) LookupIP(arg0 string, arg1 dns.IPOption) ([]net.IP, error) {
 	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "LookupIP", arg0)
+	ret := m.ctrl.Call(m, "LookupIP", arg0, arg1)
 	ret0, _ := ret[0].([]net.IP)
 	ret1, _ := ret[1].(error)
 	return ret0, ret1
 }
 
 // LookupIP indicates an expected call of LookupIP
-func (mr *DNSClientMockRecorder) LookupIP(arg0 interface{}) *gomock.Call {
+func (mr *DNSClientMockRecorder) LookupIP(arg0, arg1 interface{}) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "LookupIP", reflect.TypeOf((*DNSClient)(nil).LookupIP), arg0)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "LookupIP", reflect.TypeOf((*DNSClient)(nil).LookupIP), arg0, arg1)
 }
 
 // Start mocks base method

testing/scenarios/tls_test.go

@@ -24,6 +24,7 @@ import (
 	"github.com/xtls/xray-core/testing/servers/tcp"
 	"github.com/xtls/xray-core/testing/servers/udp"
 	"github.com/xtls/xray-core/transport/internet"
+	"github.com/xtls/xray-core/transport/internet/grpc"
 	"github.com/xtls/xray-core/transport/internet/http"
 	"github.com/xtls/xray-core/transport/internet/tls"
 	"github.com/xtls/xray-core/transport/internet/websocket"
@@ -589,3 +590,239 @@ func TestHTTP2(t *testing.T) {
 		t.Error(err)
 	}
 }
+
+func TestGRPC(t *testing.T) {
+	tcpServer := tcp.Server{
+		MsgProcessor: xor,
+	}
+	dest, err := tcpServer.Start()
+	common.Must(err)
+	defer tcpServer.Close()
+
+	userID := protocol.NewID(uuid.New())
+	serverPort := tcp.PickPort()
+	serverConfig := &core.Config{
+		Inbound: []*core.InboundHandlerConfig{
+			{
+				ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
+					PortRange: net.SinglePortRange(serverPort),
+					Listen:    net.NewIPOrDomain(net.LocalHostIP),
+					StreamSettings: &internet.StreamConfig{
+						ProtocolName: "grpc",
+						TransportSettings: []*internet.TransportConfig{
+							{
+								ProtocolName: "grpc",
+								Settings:     serial.ToTypedMessage(&grpc.Config{ServiceName: "🍉"}),
+							},
+						},
+						SecurityType: serial.GetMessageType(&tls.Config{}),
+						SecuritySettings: []*serial.TypedMessage{
+							serial.ToTypedMessage(&tls.Config{
+								Certificate: []*tls.Certificate{tls.ParseCertificate(cert.MustGenerate(nil))},
+							}),
+						},
+					},
+				}),
+				ProxySettings: serial.ToTypedMessage(&inbound.Config{
+					User: []*protocol.User{
+						{
+							Account: serial.ToTypedMessage(&vmess.Account{
+								Id: userID.String(),
+							}),
+						},
+					},
+				}),
+			},
+		},
+		Outbound: []*core.OutboundHandlerConfig{
+			{
+				ProxySettings: serial.ToTypedMessage(&freedom.Config{}),
+			},
+		},
+	}
+
+	clientPort := tcp.PickPort()
+	clientConfig := &core.Config{
+		Inbound: []*core.InboundHandlerConfig{
+			{
+				ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
+					PortRange: net.SinglePortRange(clientPort),
+					Listen:    net.NewIPOrDomain(net.LocalHostIP),
+				}),
+				ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
+					Address: net.NewIPOrDomain(dest.Address),
+					Port:    uint32(dest.Port),
+					NetworkList: &net.NetworkList{
+						Network: []net.Network{net.Network_TCP},
+					},
+				}),
+			},
+		},
+		Outbound: []*core.OutboundHandlerConfig{
+			{
+				ProxySettings: serial.ToTypedMessage(&outbound.Config{
+					Receiver: []*protocol.ServerEndpoint{
+						{
+							Address: net.NewIPOrDomain(net.LocalHostIP),
+							Port:    uint32(serverPort),
+							User: []*protocol.User{
+								{
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
+						},
+					},
+				}),
+				SenderSettings: serial.ToTypedMessage(&proxyman.SenderConfig{
+					StreamSettings: &internet.StreamConfig{
+						ProtocolName: "grpc",
+						TransportSettings: []*internet.TransportConfig{
+							{
+								ProtocolName: "grpc",
+								Settings:     serial.ToTypedMessage(&grpc.Config{ServiceName: "🍉"}),
+							},
+						},
+						SecurityType: serial.GetMessageType(&tls.Config{}),
+						SecuritySettings: []*serial.TypedMessage{
+							serial.ToTypedMessage(&tls.Config{
+								AllowInsecure: true,
+							}),
+						},
+					},
+				}),
+			},
+		},
+	}
+
+	servers, err := InitializeServerConfigs(serverConfig, clientConfig)
+	common.Must(err)
+	defer CloseAllServers(servers)
+
+	var errg errgroup.Group
+	for i := 0; i < 10; i++ {
+		errg.Go(testTCPConn(clientPort, 1024*10240, time.Second*40))
+	}
+	if err := errg.Wait(); err != nil {
+		t.Error(err)
+	}
+}
+
+func TestGRPCMultiMode(t *testing.T) {
+	tcpServer := tcp.Server{
+		MsgProcessor: xor,
+	}
+	dest, err := tcpServer.Start()
+	common.Must(err)
+	defer tcpServer.Close()
+
+	userID := protocol.NewID(uuid.New())
+	serverPort := tcp.PickPort()
+	serverConfig := &core.Config{
+		Inbound: []*core.InboundHandlerConfig{
+			{
+				ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
+					PortRange: net.SinglePortRange(serverPort),
+					Listen:    net.NewIPOrDomain(net.LocalHostIP),
+					StreamSettings: &internet.StreamConfig{
+						ProtocolName: "grpc",
+						TransportSettings: []*internet.TransportConfig{
+							{
+								ProtocolName: "grpc",
+								Settings:     serial.ToTypedMessage(&grpc.Config{ServiceName: "🍉"}),
+							},
+						},
+						SecurityType: serial.GetMessageType(&tls.Config{}),
+						SecuritySettings: []*serial.TypedMessage{
+							serial.ToTypedMessage(&tls.Config{
+								Certificate: []*tls.Certificate{tls.ParseCertificate(cert.MustGenerate(nil))},
+							}),
+						},
+					},
+				}),
+				ProxySettings: serial.ToTypedMessage(&inbound.Config{
+					User: []*protocol.User{
+						{
+							Account: serial.ToTypedMessage(&vmess.Account{
+								Id: userID.String(),
+							}),
+						},
+					},
+				}),
+			},
+		},
+		Outbound: []*core.OutboundHandlerConfig{
+			{
+				ProxySettings: serial.ToTypedMessage(&freedom.Config{}),
+			},
+		},
+	}
+
+	clientPort := tcp.PickPort()
+	clientConfig := &core.Config{
+		Inbound: []*core.InboundHandlerConfig{
+			{
+				ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
+					PortRange: net.SinglePortRange(clientPort),
+					Listen:    net.NewIPOrDomain(net.LocalHostIP),
+				}),
+				ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
+					Address: net.NewIPOrDomain(dest.Address),
+					Port:    uint32(dest.Port),
+					NetworkList: &net.NetworkList{
+						Network: []net.Network{net.Network_TCP},
+					},
+				}),
+			},
+		},
+		Outbound: []*core.OutboundHandlerConfig{
+			{
+				ProxySettings: serial.ToTypedMessage(&outbound.Config{
+					Receiver: []*protocol.ServerEndpoint{
+						{
+							Address: net.NewIPOrDomain(net.LocalHostIP),
+							Port:    uint32(serverPort),
+							User: []*protocol.User{
+								{
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id: userID.String(),
+									}),
+								},
+							},
+						},
+					},
+				}),
+				SenderSettings: serial.ToTypedMessage(&proxyman.SenderConfig{
+					StreamSettings: &internet.StreamConfig{
+						ProtocolName: "grpc",
+						TransportSettings: []*internet.TransportConfig{
+							{
+								ProtocolName: "grpc",
+								Settings:     serial.ToTypedMessage(&grpc.Config{ServiceName: "🍉", MultiMode: true}),
+							},
+						},
+						SecurityType: serial.GetMessageType(&tls.Config{}),
+						SecuritySettings: []*serial.TypedMessage{
+							serial.ToTypedMessage(&tls.Config{
+								AllowInsecure: true,
+							}),
+						},
+					},
+				}),
+			},
+		},
+	}
+
+	servers, err := InitializeServerConfigs(serverConfig, clientConfig)
+	common.Must(err)
+	defer CloseAllServers(servers)
+
+	var errg errgroup.Group
+	for i := 0; i < 10; i++ {
+		errg.Go(testTCPConn(clientPort, 1024*10240, time.Second*40))
+	}
+	if err := errg.Wait(); err != nil {
+		t.Error(err)
+	}
+}

testing/scenarios/vmess_test.go

@@ -1183,3 +1183,106 @@ func TestVMessGCMMuxUDP(t *testing.T) {
 		CloseAllServers(servers)
 	}()
 }
+
+func TestVMessZero(t *testing.T) {
+	tcpServer := tcp.Server{
+		MsgProcessor: xor,
+	}
+	dest, err := tcpServer.Start()
+	common.Must(err)
+	defer tcpServer.Close()
+
+	userID := protocol.NewID(uuid.New())
+	serverPort := tcp.PickPort()
+	serverConfig := &core.Config{
+		App: []*serial.TypedMessage{
+			serial.ToTypedMessage(&log.Config{
+				ErrorLogLevel: clog.Severity_Debug,
+				ErrorLogType:  log.LogType_Console,
+			}),
+		},
+		Inbound: []*core.InboundHandlerConfig{
+			{
+				ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
+					PortRange: net.SinglePortRange(serverPort),
+					Listen:    net.NewIPOrDomain(net.LocalHostIP),
+				}),
+				ProxySettings: serial.ToTypedMessage(&inbound.Config{
+					User: []*protocol.User{
+						{
+							Account: serial.ToTypedMessage(&vmess.Account{
+								Id:      userID.String(),
+								AlterId: 64,
+							}),
+						},
+					},
+				}),
+			},
+		},
+		Outbound: []*core.OutboundHandlerConfig{
+			{
+				ProxySettings: serial.ToTypedMessage(&freedom.Config{}),
+			},
+		},
+	}
+
+	clientPort := tcp.PickPort()
+	clientConfig := &core.Config{
+		App: []*serial.TypedMessage{
+			serial.ToTypedMessage(&log.Config{
+				ErrorLogLevel: clog.Severity_Debug,
+				ErrorLogType:  log.LogType_Console,
+			}),
+		},
+		Inbound: []*core.InboundHandlerConfig{
+			{
+				ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
+					PortRange: net.SinglePortRange(clientPort),
+					Listen:    net.NewIPOrDomain(net.LocalHostIP),
+				}),
+				ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
+					Address: net.NewIPOrDomain(dest.Address),
+					Port:    uint32(dest.Port),
+					NetworkList: &net.NetworkList{
+						Network: []net.Network{net.Network_TCP},
+					},
+				}),
+			},
+		},
+		Outbound: []*core.OutboundHandlerConfig{
+			{
+				ProxySettings: serial.ToTypedMessage(&outbound.Config{
+					Receiver: []*protocol.ServerEndpoint{
+						{
+							Address: net.NewIPOrDomain(net.LocalHostIP),
+							Port:    uint32(serverPort),
+							User: []*protocol.User{
+								{
+									Account: serial.ToTypedMessage(&vmess.Account{
+										Id:      userID.String(),
+										AlterId: 64,
+										SecuritySettings: &protocol.SecurityConfig{
+											Type: protocol.SecurityType_ZERO,
+										},
+									}),
+								},
+							},
+						},
+					},
+				}),
+			},
+		},
+	}
+
+	servers, err := InitializeServerConfigs(serverConfig, clientConfig)
+	common.Must(err)
+	defer CloseAllServers(servers)
+
+	var errg errgroup.Group
+	for i := 0; i < 10; i++ {
+		errg.Go(testTCPConn(clientPort, 1024*1024, time.Second*30))
+	}
+	if err := errg.Wait(); err != nil {
+		t.Error(err)
+	}
+}

transport/config.pb.go

@@ -1,165 +0,0 @@
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.14.0
-// source: transport/config.proto
-
-package transport
-
-import (
-	proto "github.com/golang/protobuf/proto"
-	internet "github.com/xtls/xray-core/transport/internet"
-	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
-	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
-	reflect "reflect"
-	sync "sync"
-)
-
-const (
-	// Verify that this generated code is sufficiently up-to-date.
-	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
-	// Verify that runtime/protoimpl is sufficiently up-to-date.
-	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
-)
-
-// This is a compile-time assertion that a sufficiently up-to-date version
-// of the legacy proto package is being used.
-const _ = proto.ProtoPackageIsVersion4
-
-// Global transport settings. This affects all type of connections that go
-// through Xray. Deprecated. Use each settings in StreamConfig.
-//
-// Deprecated: Do not use.
-type Config struct {
-	state         protoimpl.MessageState
-	sizeCache     protoimpl.SizeCache
-	unknownFields protoimpl.UnknownFields
-
-	TransportSettings []*internet.TransportConfig `protobuf:"bytes,1,rep,name=transport_settings,json=transportSettings,proto3" json:"transport_settings,omitempty"`
-}
-
-func (x *Config) Reset() {
-	*x = Config{}
-	if protoimpl.UnsafeEnabled {
-		mi := &file_transport_config_proto_msgTypes[0]
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		ms.StoreMessageInfo(mi)
-	}
-}
-
-func (x *Config) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*Config) ProtoMessage() {}
-
-func (x *Config) ProtoReflect() protoreflect.Message {
-	mi := &file_transport_config_proto_msgTypes[0]
-	if protoimpl.UnsafeEnabled && x != nil {
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		if ms.LoadMessageInfo() == nil {
-			ms.StoreMessageInfo(mi)
-		}
-		return ms
-	}
-	return mi.MessageOf(x)
-}
-
-// Deprecated: Use Config.ProtoReflect.Descriptor instead.
-func (*Config) Descriptor() ([]byte, []int) {
-	return file_transport_config_proto_rawDescGZIP(), []int{0}
-}
-
-func (x *Config) GetTransportSettings() []*internet.TransportConfig {
-	if x != nil {
-		return x.TransportSettings
-	}
-	return nil
-}
-
-var File_transport_config_proto protoreflect.FileDescriptor
-
-var file_transport_config_proto_rawDesc = []byte{
-	0x0a, 0x16, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2f, 0x63, 0x6f, 0x6e, 0x66,
-	0x69, 0x67, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x0e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74,
-	0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x1a, 0x1f, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70,
-	0x6f, 0x72, 0x74, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2f, 0x63, 0x6f, 0x6e,
-	0x66, 0x69, 0x67, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x65, 0x0a, 0x06, 0x43, 0x6f, 0x6e,
-	0x66, 0x69, 0x67, 0x12, 0x57, 0x0a, 0x12, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74,
-	0x5f, 0x73, 0x65, 0x74, 0x74, 0x69, 0x6e, 0x67, 0x73, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32,
-	0x28, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74,
-	0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x70,
-	0x6f, 0x72, 0x74, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x52, 0x11, 0x74, 0x72, 0x61, 0x6e, 0x73,
-	0x70, 0x6f, 0x72, 0x74, 0x53, 0x65, 0x74, 0x74, 0x69, 0x6e, 0x67, 0x73, 0x3a, 0x02, 0x18, 0x01,
-	0x42, 0x4c, 0x0a, 0x12, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61,
-	0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x50, 0x01, 0x5a, 0x23, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62,
-	0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63,
-	0x6f, 0x72, 0x65, 0x2f, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0xaa, 0x02, 0x0e,
-	0x58, 0x72, 0x61, 0x79, 0x2e, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x62, 0x06,
-	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
-}
-
-var (
-	file_transport_config_proto_rawDescOnce sync.Once
-	file_transport_config_proto_rawDescData = file_transport_config_proto_rawDesc
-)
-
-func file_transport_config_proto_rawDescGZIP() []byte {
-	file_transport_config_proto_rawDescOnce.Do(func() {
-		file_transport_config_proto_rawDescData = protoimpl.X.CompressGZIP(file_transport_config_proto_rawDescData)
-	})
-	return file_transport_config_proto_rawDescData
-}
-
-var file_transport_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
-var file_transport_config_proto_goTypes = []interface{}{
-	(*Config)(nil),                   // 0: xray.transport.Config
-	(*internet.TransportConfig)(nil), // 1: xray.transport.internet.TransportConfig
-}
-var file_transport_config_proto_depIdxs = []int32{
-	1, // 0: xray.transport.Config.transport_settings:type_name -> xray.transport.internet.TransportConfig
-	1, // [1:1] is the sub-list for method output_type
-	1, // [1:1] is the sub-list for method input_type
-	1, // [1:1] is the sub-list for extension type_name
-	1, // [1:1] is the sub-list for extension extendee
-	0, // [0:1] is the sub-list for field type_name
-}
-
-func init() { file_transport_config_proto_init() }
-func file_transport_config_proto_init() {
-	if File_transport_config_proto != nil {
-		return
-	}
-	if !protoimpl.UnsafeEnabled {
-		file_transport_config_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*Config); i {
-			case 0:
-				return &v.state
-			case 1:
-				return &v.sizeCache
-			case 2:
-				return &v.unknownFields
-			default:
-				return nil
-			}
-		}
-	}
-	type x struct{}
-	out := protoimpl.TypeBuilder{
-		File: protoimpl.DescBuilder{
-			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
-			RawDescriptor: file_transport_config_proto_rawDesc,
-			NumEnums:      0,
-			NumMessages:   1,
-			NumExtensions: 0,
-			NumServices:   0,
-		},
-		GoTypes:           file_transport_config_proto_goTypes,
-		DependencyIndexes: file_transport_config_proto_depIdxs,
-		MessageInfos:      file_transport_config_proto_msgTypes,
-	}.Build()
-	File_transport_config_proto = out.File
-	file_transport_config_proto_rawDesc = nil
-	file_transport_config_proto_goTypes = nil
-	file_transport_config_proto_depIdxs = nil
-}

transport/global/config.go

@@ -1,4 +1,4 @@
-package transport
+package global
 
 import (
 	"github.com/xtls/xray-core/transport/internet"

transport/global/config.pb.go

@@ -0,0 +1,167 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.25.0
+// 	protoc        v3.14.0
+// source: transport/global/config.proto
+
+package global
+
+import (
+	proto "github.com/golang/protobuf/proto"
+	internet "github.com/xtls/xray-core/transport/internet"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
+// Global transport settings. This affects all type of connections that go
+// through Xray. Deprecated. Use each settings in StreamConfig.
+//
+// Deprecated: Do not use.
+type Config struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	TransportSettings []*internet.TransportConfig `protobuf:"bytes,1,rep,name=transport_settings,json=transportSettings,proto3" json:"transport_settings,omitempty"`
+}
+
+func (x *Config) Reset() {
+	*x = Config{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_transport_global_config_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Config) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Config) ProtoMessage() {}
+
+func (x *Config) ProtoReflect() protoreflect.Message {
+	mi := &file_transport_global_config_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Config.ProtoReflect.Descriptor instead.
+func (*Config) Descriptor() ([]byte, []int) {
+	return file_transport_global_config_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Config) GetTransportSettings() []*internet.TransportConfig {
+	if x != nil {
+		return x.TransportSettings
+	}
+	return nil
+}
+
+var File_transport_global_config_proto protoreflect.FileDescriptor
+
+var file_transport_global_config_proto_rawDesc = []byte{
+	0x0a, 0x1d, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2f, 0x67, 0x6c, 0x6f, 0x62,
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+	0x6f, 0x33,
+}
+
+var (
+	file_transport_global_config_proto_rawDescOnce sync.Once
+	file_transport_global_config_proto_rawDescData = file_transport_global_config_proto_rawDesc
+)
+
+func file_transport_global_config_proto_rawDescGZIP() []byte {
+	file_transport_global_config_proto_rawDescOnce.Do(func() {
+		file_transport_global_config_proto_rawDescData = protoimpl.X.CompressGZIP(file_transport_global_config_proto_rawDescData)
+	})
+	return file_transport_global_config_proto_rawDescData
+}
+
+var file_transport_global_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_transport_global_config_proto_goTypes = []interface{}{
+	(*Config)(nil),                   // 0: xray.transport.Config
+	(*internet.TransportConfig)(nil), // 1: xray.transport.internet.TransportConfig
+}
+var file_transport_global_config_proto_depIdxs = []int32{
+	1, // 0: xray.transport.Config.transport_settings:type_name -> xray.transport.internet.TransportConfig
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_transport_global_config_proto_init() }
+func file_transport_global_config_proto_init() {
+	if File_transport_global_config_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_transport_global_config_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Config); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_transport_global_config_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_transport_global_config_proto_goTypes,
+		DependencyIndexes: file_transport_global_config_proto_depIdxs,
+		MessageInfos:      file_transport_global_config_proto_msgTypes,
+	}.Build()
+	File_transport_global_config_proto = out.File
+	file_transport_global_config_proto_rawDesc = nil
+	file_transport_global_config_proto_goTypes = nil
+	file_transport_global_config_proto_depIdxs = nil
+}

transport/global/config.proto

@@ -1,9 +1,9 @@
 syntax = "proto3";
 
 package xray.transport;
-option csharp_namespace = "Xray.Transport";
-option go_package = "github.com/xtls/xray-core/transport";
-option java_package = "com.xray.transport";
+option csharp_namespace = "Xray.Transport.Global";
+option go_package = "github.com/xtls/xray-core/transport/global";
+option java_package = "com.xray.transport.global";
 option java_multiple_files = true;
 
 import "transport/internet/config.proto";

transport/internet/config.pb.go

@@ -84,56 +84,56 @@ func (TransportProtocol) EnumDescriptor() ([]byte, []int) {
 	return file_transport_internet_config_proto_rawDescGZIP(), []int{0}
 }
 
-type SocketConfig_TCPFastOpenState int32
+type DomainStrategy int32
 
 const (
-	// AsIs is to leave the current TFO state as is, unmodified.
-	SocketConfig_AsIs SocketConfig_TCPFastOpenState = 0
-	// Enable is for enabling TFO explictly.
-	SocketConfig_Enable SocketConfig_TCPFastOpenState = 1
-	// Disable is for disabling TFO explictly.
-	SocketConfig_Disable SocketConfig_TCPFastOpenState = 2
+	DomainStrategy_AS_IS   DomainStrategy = 0
+	DomainStrategy_USE_IP  DomainStrategy = 1
+	DomainStrategy_USE_IP4 DomainStrategy = 2
+	DomainStrategy_USE_IP6 DomainStrategy = 3
 )
 
-// Enum value maps for SocketConfig_TCPFastOpenState.
+// Enum value maps for DomainStrategy.
 var (
-	SocketConfig_TCPFastOpenState_name = map[int32]string{
-		0: "AsIs",
-		1: "Enable",
-		2: "Disable",
+	DomainStrategy_name = map[int32]string{
+		0: "AS_IS",
+		1: "USE_IP",
+		2: "USE_IP4",
+		3: "USE_IP6",
 	}
-	SocketConfig_TCPFastOpenState_value = map[string]int32{
-		"AsIs":    0,
-		"Enable":  1,
-		"Disable": 2,
+	DomainStrategy_value = map[string]int32{
+		"AS_IS":   0,
+		"USE_IP":  1,
+		"USE_IP4": 2,
+		"USE_IP6": 3,
 	}
 )
 
-func (x SocketConfig_TCPFastOpenState) Enum() *SocketConfig_TCPFastOpenState {
-	p := new(SocketConfig_TCPFastOpenState)
+func (x DomainStrategy) Enum() *DomainStrategy {
+	p := new(DomainStrategy)
 	*p = x
 	return p
 }
 
-func (x SocketConfig_TCPFastOpenState) String() string {
+func (x DomainStrategy) String() string {
 	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
 }
 
-func (SocketConfig_TCPFastOpenState) Descriptor() protoreflect.EnumDescriptor {
+func (DomainStrategy) Descriptor() protoreflect.EnumDescriptor {
 	return file_transport_internet_config_proto_enumTypes[1].Descriptor()
 }
 
-func (SocketConfig_TCPFastOpenState) Type() protoreflect.EnumType {
+func (DomainStrategy) Type() protoreflect.EnumType {
 	return &file_transport_internet_config_proto_enumTypes[1]
 }
 
-func (x SocketConfig_TCPFastOpenState) Number() protoreflect.EnumNumber {
+func (x DomainStrategy) Number() protoreflect.EnumNumber {
 	return protoreflect.EnumNumber(x)
 }
 
-// Deprecated: Use SocketConfig_TCPFastOpenState.Descriptor instead.
-func (SocketConfig_TCPFastOpenState) EnumDescriptor() ([]byte, []int) {
-	return file_transport_internet_config_proto_rawDescGZIP(), []int{3, 0}
+// Deprecated: Use DomainStrategy.Descriptor instead.
+func (DomainStrategy) EnumDescriptor() ([]byte, []int) {
+	return file_transport_internet_config_proto_rawDescGZIP(), []int{1}
 }
 
 type SocketConfig_TProxyMode int32
@@ -185,7 +185,7 @@ func (x SocketConfig_TProxyMode) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use SocketConfig_TProxyMode.Descriptor instead.
 func (SocketConfig_TProxyMode) EnumDescriptor() ([]byte, []int) {
-	return file_transport_internet_config_proto_rawDescGZIP(), []int{3, 1}
+	return file_transport_internet_config_proto_rawDescGZIP(), []int{3, 0}
 }
 
 type TransportConfig struct {
@@ -357,7 +357,8 @@ type ProxyConfig struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Tag string `protobuf:"bytes,1,opt,name=tag,proto3" json:"tag,omitempty"`
+	Tag                 string `protobuf:"bytes,1,opt,name=tag,proto3" json:"tag,omitempty"`
+	TransportLayerProxy bool   `protobuf:"varint,2,opt,name=transportLayerProxy,proto3" json:"transportLayerProxy,omitempty"`
 }
 
 func (x *ProxyConfig) Reset() {
@@ -399,6 +400,13 @@ func (x *ProxyConfig) GetTag() string {
 	return ""
 }
 
+func (x *ProxyConfig) GetTransportLayerProxy() bool {
+	if x != nil {
+		return x.TransportLayerProxy
+	}
+	return false
+}
+
 // SocketConfig is options to be applied on network sockets.
 type SocketConfig struct {
 	state         protoimpl.MessageState
@@ -408,15 +416,17 @@ type SocketConfig struct {
 	// Mark of the connection. If non-zero, the value will be set to SO_MARK.
 	Mark int32 `protobuf:"varint,1,opt,name=mark,proto3" json:"mark,omitempty"`
 	// TFO is the state of TFO settings.
-	Tfo SocketConfig_TCPFastOpenState `protobuf:"varint,2,opt,name=tfo,proto3,enum=xray.transport.internet.SocketConfig_TCPFastOpenState" json:"tfo,omitempty"`
+	Tfo int32 `protobuf:"varint,2,opt,name=tfo,proto3" json:"tfo,omitempty"`
 	// TProxy is for enabling TProxy socket option.
 	Tproxy SocketConfig_TProxyMode `protobuf:"varint,3,opt,name=tproxy,proto3,enum=xray.transport.internet.SocketConfig_TProxyMode" json:"tproxy,omitempty"`
 	// ReceiveOriginalDestAddress is for enabling IP_RECVORIGDSTADDR socket
 	// option. This option is for UDP only.
-	ReceiveOriginalDestAddress bool   `protobuf:"varint,4,opt,name=receive_original_dest_address,json=receiveOriginalDestAddress,proto3" json:"receive_original_dest_address,omitempty"`
-	BindAddress                []byte `protobuf:"bytes,5,opt,name=bind_address,json=bindAddress,proto3" json:"bind_address,omitempty"`
-	BindPort                   uint32 `protobuf:"varint,6,opt,name=bind_port,json=bindPort,proto3" json:"bind_port,omitempty"`
-	AcceptProxyProtocol        bool   `protobuf:"varint,7,opt,name=accept_proxy_protocol,json=acceptProxyProtocol,proto3" json:"accept_proxy_protocol,omitempty"`
+	ReceiveOriginalDestAddress bool           `protobuf:"varint,4,opt,name=receive_original_dest_address,json=receiveOriginalDestAddress,proto3" json:"receive_original_dest_address,omitempty"`
+	BindAddress                []byte         `protobuf:"bytes,5,opt,name=bind_address,json=bindAddress,proto3" json:"bind_address,omitempty"`
+	BindPort                   uint32         `protobuf:"varint,6,opt,name=bind_port,json=bindPort,proto3" json:"bind_port,omitempty"`
+	AcceptProxyProtocol        bool           `protobuf:"varint,7,opt,name=accept_proxy_protocol,json=acceptProxyProtocol,proto3" json:"accept_proxy_protocol,omitempty"`
+	DomainStrategy             DomainStrategy `protobuf:"varint,8,opt,name=domain_strategy,json=domainStrategy,proto3,enum=xray.transport.internet.DomainStrategy" json:"domain_strategy,omitempty"`
+	DialerProxy                string         `protobuf:"bytes,9,opt,name=dialer_proxy,json=dialerProxy,proto3" json:"dialer_proxy,omitempty"`
 }
 
 func (x *SocketConfig) Reset() {
@@ -458,11 +468,11 @@ func (x *SocketConfig) GetMark() int32 {
 	return 0
 }
 
-func (x *SocketConfig) GetTfo() SocketConfig_TCPFastOpenState {
+func (x *SocketConfig) GetTfo() int32 {
 	if x != nil {
 		return x.Tfo
 	}
-	return SocketConfig_AsIs
+	return 0
 }
 
 func (x *SocketConfig) GetTproxy() SocketConfig_TProxyMode {
@@ -500,6 +510,20 @@ func (x *SocketConfig) GetAcceptProxyProtocol() bool {
 	return false
 }
 
+func (x *SocketConfig) GetDomainStrategy() DomainStrategy {
+	if x != nil {
+		return x.DomainStrategy
+	}
+	return DomainStrategy_AS_IS
+}
+
+func (x *SocketConfig) GetDialerProxy() string {
+	if x != nil {
+		return x.DialerProxy
+	}
+	return ""
+}
+
 var File_transport_internet_config_proto protoreflect.FileDescriptor
 
 var file_transport_internet_config_proto_rawDesc = []byte{
@@ -547,51 +571,58 @@ var file_transport_internet_config_proto_rawDesc = []byte{
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 }
 
 var (
@@ -609,14 +640,14 @@ func file_transport_internet_config_proto_rawDescGZIP() []byte {
 var file_transport_internet_config_proto_enumTypes = make([]protoimpl.EnumInfo, 3)
 var file_transport_internet_config_proto_msgTypes = make([]protoimpl.MessageInfo, 4)
 var file_transport_internet_config_proto_goTypes = []interface{}{
-	(TransportProtocol)(0),             // 0: xray.transport.internet.TransportProtocol
-	(SocketConfig_TCPFastOpenState)(0), // 1: xray.transport.internet.SocketConfig.TCPFastOpenState
-	(SocketConfig_TProxyMode)(0),       // 2: xray.transport.internet.SocketConfig.TProxyMode
-	(*TransportConfig)(nil),            // 3: xray.transport.internet.TransportConfig
-	(*StreamConfig)(nil),               // 4: xray.transport.internet.StreamConfig
-	(*ProxyConfig)(nil),                // 5: xray.transport.internet.ProxyConfig
-	(*SocketConfig)(nil),               // 6: xray.transport.internet.SocketConfig
-	(*serial.TypedMessage)(nil),        // 7: xray.common.serial.TypedMessage
+	(TransportProtocol)(0),       // 0: xray.transport.internet.TransportProtocol
+	(DomainStrategy)(0),          // 1: xray.transport.internet.DomainStrategy
+	(SocketConfig_TProxyMode)(0), // 2: xray.transport.internet.SocketConfig.TProxyMode
+	(*TransportConfig)(nil),      // 3: xray.transport.internet.TransportConfig
+	(*StreamConfig)(nil),         // 4: xray.transport.internet.StreamConfig
+	(*ProxyConfig)(nil),          // 5: xray.transport.internet.ProxyConfig
+	(*SocketConfig)(nil),         // 6: xray.transport.internet.SocketConfig
+	(*serial.TypedMessage)(nil),  // 7: xray.common.serial.TypedMessage
 }
 var file_transport_internet_config_proto_depIdxs = []int32{
 	0, // 0: xray.transport.internet.TransportConfig.protocol:type_name -> xray.transport.internet.TransportProtocol
@@ -625,8 +656,8 @@ var file_transport_internet_config_proto_depIdxs = []int32{
 	3, // 3: xray.transport.internet.StreamConfig.transport_settings:type_name -> xray.transport.internet.TransportConfig
 	7, // 4: xray.transport.internet.StreamConfig.security_settings:type_name -> xray.common.serial.TypedMessage
 	6, // 5: xray.transport.internet.StreamConfig.socket_settings:type_name -> xray.transport.internet.SocketConfig
-	1, // 6: xray.transport.internet.SocketConfig.tfo:type_name -> xray.transport.internet.SocketConfig.TCPFastOpenState
-	2, // 7: xray.transport.internet.SocketConfig.tproxy:type_name -> xray.transport.internet.SocketConfig.TProxyMode
+	2, // 6: xray.transport.internet.SocketConfig.tproxy:type_name -> xray.transport.internet.SocketConfig.TProxyMode
+	1, // 7: xray.transport.internet.SocketConfig.domain_strategy:type_name -> xray.transport.internet.DomainStrategy
 	8, // [8:8] is the sub-list for method output_type
 	8, // [8:8] is the sub-list for method input_type
 	8, // [8:8] is the sub-list for extension type_name

transport/internet/config.proto

@@ -17,6 +17,13 @@ enum TransportProtocol {
   DomainSocket = 5;
 }
 
+enum DomainStrategy {
+  AS_IS = 0;
+  USE_IP = 1;
+  USE_IP4 = 2;
+  USE_IP6 = 3;
+}
+
 message TransportConfig {
   // Type of network that this settings supports.
   // Deprecated. Use the string form below.
@@ -47,24 +54,18 @@ message StreamConfig {
   SocketConfig socket_settings = 6;
 }
 
-message ProxyConfig { string tag = 1; }
+message ProxyConfig {
+  string tag = 1;
+  bool transportLayerProxy = 2;
+}
 
 // SocketConfig is options to be applied on network sockets.
 message SocketConfig {
   // Mark of the connection. If non-zero, the value will be set to SO_MARK.
   int32 mark = 1;
 
-  enum TCPFastOpenState {
-    // AsIs is to leave the current TFO state as is, unmodified.
-    AsIs = 0;
-    // Enable is for enabling TFO explictly.
-    Enable = 1;
-    // Disable is for disabling TFO explictly.
-    Disable = 2;
-  }
-
   // TFO is the state of TFO settings.
-  TCPFastOpenState tfo = 2;
+  int32 tfo = 2;
 
   enum TProxyMode {
     // TProxy is off.
@@ -87,4 +88,7 @@ message SocketConfig {
   uint32 bind_port = 6;
 
   bool accept_proxy_protocol = 7;
+
+  DomainStrategy domain_strategy = 8;
+  string dialer_proxy = 9;
 }

transport/internet/grpc/config.go

@@ -0,0 +1,14 @@
+package grpc
+
+import (
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/transport/internet"
+)
+
+const protocolName = "grpc"
+
+func init() {
+	common.Must(internet.RegisterProtocolConfigCreator(protocolName, func() interface{} {
+		return new(Config)
+	}))
+}

transport/internet/grpc/config.pb.go

@@ -0,0 +1,172 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.25.0
+// 	protoc        v3.15.6
+// source: transport/internet/grpc/config.proto
+
+package grpc
+
+import (
+	proto "github.com/golang/protobuf/proto"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
+type Config struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Host        string `protobuf:"bytes,1,opt,name=host,proto3" json:"host,omitempty"`
+	ServiceName string `protobuf:"bytes,2,opt,name=service_name,json=serviceName,proto3" json:"service_name,omitempty"`
+	MultiMode   bool   `protobuf:"varint,3,opt,name=multi_mode,json=multiMode,proto3" json:"multi_mode,omitempty"`
+}
+
+func (x *Config) Reset() {
+	*x = Config{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_transport_internet_grpc_config_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Config) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Config) ProtoMessage() {}
+
+func (x *Config) ProtoReflect() protoreflect.Message {
+	mi := &file_transport_internet_grpc_config_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Config.ProtoReflect.Descriptor instead.
+func (*Config) Descriptor() ([]byte, []int) {
+	return file_transport_internet_grpc_config_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Config) GetHost() string {
+	if x != nil {
+		return x.Host
+	}
+	return ""
+}
+
+func (x *Config) GetServiceName() string {
+	if x != nil {
+		return x.ServiceName
+	}
+	return ""
+}
+
+func (x *Config) GetMultiMode() bool {
+	if x != nil {
+		return x.MultiMode
+	}
+	return false
+}
+
+var File_transport_internet_grpc_config_proto protoreflect.FileDescriptor
+
+var file_transport_internet_grpc_config_proto_rawDesc = []byte{
+	0x0a, 0x24, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2f, 0x69, 0x6e, 0x74, 0x65,
+	0x72, 0x6e, 0x65, 0x74, 0x2f, 0x67, 0x72, 0x70, 0x63, 0x2f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67,
+	0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x25, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61,
+	0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e,
+	0x67, 0x72, 0x70, 0x63, 0x2e, 0x65, 0x6e, 0x63, 0x6f, 0x64, 0x69, 0x6e, 0x67, 0x22, 0x5e, 0x0a,
+	0x06, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x12, 0x0a, 0x04, 0x68, 0x6f, 0x73, 0x74, 0x18,
+	0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x68, 0x6f, 0x73, 0x74, 0x12, 0x21, 0x0a, 0x0c, 0x73,
+	0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x5f, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28,
+	0x09, 0x52, 0x0b, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x4e, 0x61, 0x6d, 0x65, 0x12, 0x1d,
+	0x0a, 0x0a, 0x6d, 0x75, 0x6c, 0x74, 0x69, 0x5f, 0x6d, 0x6f, 0x64, 0x65, 0x18, 0x03, 0x20, 0x01,
+	0x28, 0x08, 0x52, 0x09, 0x6d, 0x75, 0x6c, 0x74, 0x69, 0x4d, 0x6f, 0x64, 0x65, 0x42, 0x33, 0x5a,
+	0x31, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73,
+	0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x74, 0x72, 0x61, 0x6e, 0x73,
+	0x70, 0x6f, 0x72, 0x74, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2f, 0x67, 0x72,
+	0x70, 0x63, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_transport_internet_grpc_config_proto_rawDescOnce sync.Once
+	file_transport_internet_grpc_config_proto_rawDescData = file_transport_internet_grpc_config_proto_rawDesc
+)
+
+func file_transport_internet_grpc_config_proto_rawDescGZIP() []byte {
+	file_transport_internet_grpc_config_proto_rawDescOnce.Do(func() {
+		file_transport_internet_grpc_config_proto_rawDescData = protoimpl.X.CompressGZIP(file_transport_internet_grpc_config_proto_rawDescData)
+	})
+	return file_transport_internet_grpc_config_proto_rawDescData
+}
+
+var file_transport_internet_grpc_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_transport_internet_grpc_config_proto_goTypes = []interface{}{
+	(*Config)(nil), // 0: xray.transport.internet.grpc.encoding.Config
+}
+var file_transport_internet_grpc_config_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_transport_internet_grpc_config_proto_init() }
+func file_transport_internet_grpc_config_proto_init() {
+	if File_transport_internet_grpc_config_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_transport_internet_grpc_config_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Config); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_transport_internet_grpc_config_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_transport_internet_grpc_config_proto_goTypes,
+		DependencyIndexes: file_transport_internet_grpc_config_proto_depIdxs,
+		MessageInfos:      file_transport_internet_grpc_config_proto_msgTypes,
+	}.Build()
+	File_transport_internet_grpc_config_proto = out.File
+	file_transport_internet_grpc_config_proto_rawDesc = nil
+	file_transport_internet_grpc_config_proto_goTypes = nil
+	file_transport_internet_grpc_config_proto_depIdxs = nil
+}

transport/internet/grpc/config.proto

@@ -0,0 +1,10 @@
+syntax = "proto3";
+
+package xray.transport.internet.grpc.encoding;
+option go_package = "github.com/xtls/xray-core/transport/internet/grpc";
+
+message Config {
+  string host = 1;
+  string service_name = 2;
+  bool multi_mode = 3;
+}

transport/internet/grpc/dial.go

@@ -0,0 +1,130 @@
+package grpc
+
+import (
+	"context"
+	gonet "net"
+	"sync"
+	"time"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/backoff"
+	"google.golang.org/grpc/connectivity"
+	"google.golang.org/grpc/credentials"
+
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/transport/internet"
+	"github.com/xtls/xray-core/transport/internet/grpc/encoding"
+	"github.com/xtls/xray-core/transport/internet/tls"
+)
+
+func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) {
+	newError("creating connection to ", dest).WriteToLog(session.ExportIDToError(ctx))
+
+	conn, err := dialgRPC(ctx, dest, streamSettings)
+	if err != nil {
+		return nil, newError("failed to dial gRPC").Base(err)
+	}
+	return internet.Connection(conn), nil
+}
+
+func init() {
+	common.Must(internet.RegisterTransportDialer(protocolName, Dial))
+}
+
+type dialerConf struct {
+	net.Destination
+	*internet.SocketConfig
+}
+
+var (
+	globalDialerMap    map[dialerConf]*grpc.ClientConn
+	globalDialerAccess sync.Mutex
+)
+
+func dialgRPC(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (net.Conn, error) {
+	grpcSettings := streamSettings.ProtocolSettings.(*Config)
+
+	config := tls.ConfigFromStreamSettings(streamSettings)
+	var dialOption = grpc.WithInsecure()
+
+	if config != nil {
+		dialOption = grpc.WithTransportCredentials(credentials.NewTLS(config.GetTLSConfig()))
+	}
+
+	conn, err := getGrpcClient(ctx, dest, dialOption, streamSettings.SocketSettings)
+
+	if err != nil {
+		return nil, newError("Cannot dial gRPC").Base(err)
+	}
+	client := encoding.NewGRPCServiceClient(conn)
+	if grpcSettings.MultiMode {
+		newError("using gRPC multi mode").AtDebug().WriteToLog()
+		grpcService, err := client.(encoding.GRPCServiceClientX).TunMultiCustomName(ctx, grpcSettings.ServiceName)
+		if err != nil {
+			return nil, newError("Cannot dial gRPC").Base(err)
+		}
+		return encoding.NewMultiHunkConn(grpcService, nil), nil
+	}
+
+	grpcService, err := client.(encoding.GRPCServiceClientX).TunCustomName(ctx, grpcSettings.ServiceName)
+	if err != nil {
+		return nil, newError("Cannot dial gRPC").Base(err)
+	}
+
+	return encoding.NewHunkConn(grpcService, nil), nil
+}
+
+func getGrpcClient(ctx context.Context, dest net.Destination, dialOption grpc.DialOption, sockopt *internet.SocketConfig) (*grpc.ClientConn, error) {
+	globalDialerAccess.Lock()
+	defer globalDialerAccess.Unlock()
+
+	if globalDialerMap == nil {
+		globalDialerMap = make(map[dialerConf]*grpc.ClientConn)
+	}
+
+	if client, found := globalDialerMap[dialerConf{dest, sockopt}]; found && client.GetState() != connectivity.Shutdown {
+		return client, nil
+	}
+
+	conn, err := grpc.Dial(
+		gonet.JoinHostPort(dest.Address.String(), dest.Port.String()),
+		dialOption,
+		grpc.WithConnectParams(grpc.ConnectParams{
+			Backoff: backoff.Config{
+				BaseDelay:  500 * time.Millisecond,
+				Multiplier: 1.5,
+				Jitter:     0.2,
+				MaxDelay:   19 * time.Second,
+			},
+			MinConnectTimeout: 5 * time.Second,
+		}),
+		grpc.WithContextDialer(func(gctx context.Context, s string) (gonet.Conn, error) {
+			gctx = session.ContextWithID(gctx, session.IDFromContext(ctx))
+			gctx = session.ContextWithOutbound(gctx, session.OutboundFromContext(ctx))
+
+			rawHost, rawPort, err := net.SplitHostPort(s)
+			select {
+			case <-gctx.Done():
+				return nil, gctx.Err()
+			default:
+			}
+
+			if err != nil {
+				return nil, err
+			}
+			if len(rawPort) == 0 {
+				rawPort = "443"
+			}
+			port, err := net.PortFromString(rawPort)
+			if err != nil {
+				return nil, err
+			}
+			address := net.ParseAddress(rawHost)
+			return internet.DialSystem(gctx, net.TCPDestination(address, port), sockopt)
+		}),
+	)
+	globalDialerMap[dialerConf{dest, sockopt}] = conn
+	return conn, err
+}

transport/internet/grpc/encoding/customSeviceName.go

@@ -0,0 +1,60 @@
+package encoding
+
+import (
+	"context"
+
+	"google.golang.org/grpc"
+)
+
+func ServerDesc(name string) grpc.ServiceDesc {
+	return grpc.ServiceDesc{
+		ServiceName: name,
+		HandlerType: (*GRPCServiceServer)(nil),
+		Methods:     []grpc.MethodDesc{},
+		Streams: []grpc.StreamDesc{
+			{
+				StreamName:    "Tun",
+				Handler:       _GRPCService_Tun_Handler,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
+			{
+				StreamName:    "TunMulti",
+				Handler:       _GRPCService_TunMulti_Handler,
+				ServerStreams: true,
+				ClientStreams: true,
+			},
+		},
+		Metadata: "grpc.proto",
+	}
+}
+
+func (c *gRPCServiceClient) TunCustomName(ctx context.Context, name string, opts ...grpc.CallOption) (GRPCService_TunClient, error) {
+	stream, err := c.cc.NewStream(ctx, &ServerDesc(name).Streams[0], "/"+name+"/Tun", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &gRPCServiceTunClient{stream}
+	return x, nil
+}
+
+func (c *gRPCServiceClient) TunMultiCustomName(ctx context.Context, name string, opts ...grpc.CallOption) (GRPCService_TunMultiClient, error) {
+	stream, err := c.cc.NewStream(ctx, &ServerDesc(name).Streams[0], "/"+name+"/TunMulti", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &gRPCServiceTunMultiClient{stream}
+	return x, nil
+}
+
+type GRPCServiceClientX interface {
+	TunCustomName(ctx context.Context, name string, opts ...grpc.CallOption) (GRPCService_TunClient, error)
+	TunMultiCustomName(ctx context.Context, name string, opts ...grpc.CallOption) (GRPCService_TunMultiClient, error)
+	Tun(ctx context.Context, opts ...grpc.CallOption) (GRPCService_TunClient, error)
+	TunMulti(ctx context.Context, opts ...grpc.CallOption) (GRPCService_TunMultiClient, error)
+}
+
+func RegisterGRPCServiceServerX(s *grpc.Server, srv GRPCServiceServer, name string) {
+	desc := ServerDesc(name)
+	s.RegisterService(&desc, srv)
+}

transport/internet/grpc/encoding/encoding.go

@@ -0,0 +1,3 @@
+package encoding
+
+//go:generate go run github.com/xtls/xray-core/common/errors/errorgen

transport/internet/grpc/encoding/errors.generated.go

@@ -0,0 +1,9 @@
+package encoding
+
+import "github.com/xtls/xray-core/common/errors"
+
+type errPathObjHolder struct{}
+
+func newError(values ...interface{}) *errors.Error {
+	return errors.New(values...).WithPathObj(errPathObjHolder{})
+}

transport/internet/grpc/encoding/hunkconn.go

@@ -0,0 +1,123 @@
+package encoding
+
+import (
+	"context"
+	"io"
+	"net"
+
+	"github.com/xtls/xray-core/common/buf"
+	"github.com/xtls/xray-core/common/net/cnc"
+	"github.com/xtls/xray-core/common/signal/done"
+)
+
+type HunkConn interface {
+	Send(*Hunk) error
+	Recv() (*Hunk, error)
+	SendMsg(m interface{}) error
+	RecvMsg(m interface{}) error
+}
+
+type StreamCloser interface {
+	CloseSend() error
+}
+
+type HunkReaderWriter struct {
+	hc     HunkConn
+	cancel context.CancelFunc
+	done   *done.Instance
+
+	buf   []byte
+	index int
+}
+
+func NewHunkReadWriter(hc HunkConn, cancel context.CancelFunc) *HunkReaderWriter {
+	return &HunkReaderWriter{hc, cancel, done.New(), nil, 0}
+}
+
+func NewHunkConn(hc HunkConn, cancel context.CancelFunc) net.Conn {
+	wrc := NewHunkReadWriter(hc, cancel)
+	return cnc.NewConnection(
+		cnc.ConnectionInput(wrc),
+		cnc.ConnectionOutput(wrc),
+		cnc.ConnectionOnClose(wrc),
+	)
+}
+
+func (h *HunkReaderWriter) forceFetch() error {
+	hunk, err := h.hc.Recv()
+	if err != nil {
+		if err == io.EOF {
+			return err
+		}
+
+		return newError("failed to fetch hunk from gRPC tunnel").Base(err)
+	}
+
+	h.buf = hunk.Data
+	h.index = 0
+
+	return nil
+}
+
+func (h *HunkReaderWriter) Read(buf []byte) (int, error) {
+	if h.done.Done() {
+		return 0, io.EOF
+	}
+
+	if h.index >= len(h.buf) {
+		if err := h.forceFetch(); err != nil {
+			return 0, err
+		}
+	}
+	n := copy(buf, h.buf[h.index:])
+	h.index += n
+
+	return n, nil
+}
+
+func (h *HunkReaderWriter) ReadMultiBuffer() (buf.MultiBuffer, error) {
+	if h.done.Done() {
+		return nil, io.EOF
+	}
+	if h.index >= len(h.buf) {
+		if err := h.forceFetch(); err != nil {
+			return nil, err
+		}
+	}
+
+	if cap(h.buf) == buf.Size {
+		b := h.buf
+		h.index = len(h.buf)
+		return buf.MultiBuffer{buf.NewExisted(b)}, nil
+	}
+
+	b := buf.New()
+	_, err := b.ReadFrom(h)
+	if err != nil {
+		return nil, err
+	}
+	return buf.MultiBuffer{b}, nil
+}
+
+func (h *HunkReaderWriter) Write(buf []byte) (int, error) {
+	if h.done.Done() {
+		return 0, io.ErrClosedPipe
+	}
+
+	err := h.hc.Send(&Hunk{Data: buf[:]})
+	if err != nil {
+		return 0, newError("failed to send data over gRPC tunnel").Base(err)
+	}
+	return len(buf), nil
+}
+
+func (h *HunkReaderWriter) Close() error {
+	if h.cancel != nil {
+		h.cancel()
+	}
+	if sc, match := h.hc.(StreamCloser); match {
+		return sc.CloseSend()
+	}
+
+	return h.done.Close()
+}

transport/internet/grpc/encoding/multiconn.go

@@ -0,0 +1,108 @@
+package encoding
+
+import (
+	"context"
+	"io"
+	"net"
+
+	"github.com/xtls/xray-core/common/buf"
+	"github.com/xtls/xray-core/common/net/cnc"
+	"github.com/xtls/xray-core/common/signal/done"
+)
+
+type MultiHunkConn interface {
+	Send(*MultiHunk) error
+	Recv() (*MultiHunk, error)
+	SendMsg(m interface{}) error
+	RecvMsg(m interface{}) error
+}
+
+type MultiHunkReaderWriter struct {
+	hc     MultiHunkConn
+	cancel context.CancelFunc
+	done   *done.Instance
+
+	buf [][]byte
+}
+
+func NewMultiHunkReadWriter(hc MultiHunkConn, cancel context.CancelFunc) *MultiHunkReaderWriter {
+	return &MultiHunkReaderWriter{hc, cancel, done.New(), nil}
+}
+
+func NewMultiHunkConn(hc MultiHunkConn, cancel context.CancelFunc) net.Conn {
+	wrc := NewMultiHunkReadWriter(hc, cancel)
+	return cnc.NewConnection(
+		cnc.ConnectionInputMulti(wrc),
+		cnc.ConnectionOutputMulti(wrc),
+		cnc.ConnectionOnClose(wrc),
+	)
+}
+
+func (h *MultiHunkReaderWriter) forceFetch() error {
+	hunk, err := h.hc.Recv()
+	if err != nil {
+		if err == io.EOF {
+			return err
+		}
+
+		return newError("failed to fetch hunk from gRPC tunnel").Base(err)
+	}
+
+	h.buf = hunk.Data
+
+	return nil
+}
+
+func (h *MultiHunkReaderWriter) ReadMultiBuffer() (buf.MultiBuffer, error) {
+	if h.done.Done() {
+		return nil, io.EOF
+	}
+
+	if err := h.forceFetch(); err != nil {
+		return nil, err
+	}
+
+	var mb = make(buf.MultiBuffer, 0, len(h.buf))
+	for _, b := range h.buf {
+		if cap(b) >= buf.Size {
+			mb = append(mb, buf.NewExisted(b))
+			continue
+		}
+
+		nb := buf.New()
+		nb.Extend(int32(len(b)))
+		copy(nb.Bytes(), b)
+
+		mb = append(mb, nb)
+	}
+	return mb, nil
+}
+
+func (h *MultiHunkReaderWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
+	defer buf.ReleaseMulti(mb)
+	if h.done.Done() {
+		return io.ErrClosedPipe
+	}
+
+	hunk := &MultiHunk{Data: make([][]byte, len(mb))}
+	for _, b := range mb {
+		hunk.Data = append(hunk.Data, b.Bytes())
+	}
+
+	err := h.hc.Send(hunk)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (h *MultiHunkReaderWriter) Close() error {
+	if h.cancel != nil {
+		h.cancel()
+	}
+	if sc, match := h.hc.(StreamCloser); match {
+		return sc.CloseSend()
+	}
+
+	return h.done.Close()
+}

transport/internet/grpc/encoding/stream.pb.go

@@ -0,0 +1,234 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.25.0
+// 	protoc        v3.15.6
+// source: transport/internet/grpc/encoding/stream.proto
+
+package encoding
+
+import (
+	proto "github.com/golang/protobuf/proto"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
+type Hunk struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Data []byte `protobuf:"bytes,1,opt,name=data,proto3" json:"data,omitempty"`
+}
+
+func (x *Hunk) Reset() {
+	*x = Hunk{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_transport_internet_grpc_encoding_stream_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Hunk) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Hunk) ProtoMessage() {}
+
+func (x *Hunk) ProtoReflect() protoreflect.Message {
+	mi := &file_transport_internet_grpc_encoding_stream_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Hunk.ProtoReflect.Descriptor instead.
+func (*Hunk) Descriptor() ([]byte, []int) {
+	return file_transport_internet_grpc_encoding_stream_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Hunk) GetData() []byte {
+	if x != nil {
+		return x.Data
+	}
+	return nil
+}
+
+type MultiHunk struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Data [][]byte `protobuf:"bytes,1,rep,name=data,proto3" json:"data,omitempty"`
+}
+
+func (x *MultiHunk) Reset() {
+	*x = MultiHunk{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_transport_internet_grpc_encoding_stream_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *MultiHunk) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*MultiHunk) ProtoMessage() {}
+
+func (x *MultiHunk) ProtoReflect() protoreflect.Message {
+	mi := &file_transport_internet_grpc_encoding_stream_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use MultiHunk.ProtoReflect.Descriptor instead.
+func (*MultiHunk) Descriptor() ([]byte, []int) {
+	return file_transport_internet_grpc_encoding_stream_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *MultiHunk) GetData() [][]byte {
+	if x != nil {
+		return x.Data
+	}
+	return nil
+}
+
+var File_transport_internet_grpc_encoding_stream_proto protoreflect.FileDescriptor
+
+var file_transport_internet_grpc_encoding_stream_proto_rawDesc = []byte{
+	0x0a, 0x2d, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2f, 0x69, 0x6e, 0x74, 0x65,
+	0x72, 0x6e, 0x65, 0x74, 0x2f, 0x67, 0x72, 0x70, 0x63, 0x2f, 0x65, 0x6e, 0x63, 0x6f, 0x64, 0x69,
+	0x6e, 0x67, 0x2f, 0x73, 0x74, 0x72, 0x65, 0x61, 0x6d, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12,
+	0x25, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e,
+	0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x67, 0x72, 0x70, 0x63, 0x2e, 0x65, 0x6e,
+	0x63, 0x6f, 0x64, 0x69, 0x6e, 0x67, 0x22, 0x1a, 0x0a, 0x04, 0x48, 0x75, 0x6e, 0x6b, 0x12, 0x12,
+	0x0a, 0x04, 0x64, 0x61, 0x74, 0x61, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x04, 0x64, 0x61,
+	0x74, 0x61, 0x22, 0x1f, 0x0a, 0x09, 0x4d, 0x75, 0x6c, 0x74, 0x69, 0x48, 0x75, 0x6e, 0x6b, 0x12,
+	0x12, 0x0a, 0x04, 0x64, 0x61, 0x74, 0x61, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0c, 0x52, 0x04, 0x64,
+	0x61, 0x74, 0x61, 0x32, 0xe6, 0x01, 0x0a, 0x0b, 0x47, 0x52, 0x50, 0x43, 0x53, 0x65, 0x72, 0x76,
+	0x69, 0x63, 0x65, 0x12, 0x63, 0x0a, 0x03, 0x54, 0x75, 0x6e, 0x12, 0x2b, 0x2e, 0x78, 0x72, 0x61,
+	0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65,
+	0x72, 0x6e, 0x65, 0x74, 0x2e, 0x67, 0x72, 0x70, 0x63, 0x2e, 0x65, 0x6e, 0x63, 0x6f, 0x64, 0x69,
+	0x6e, 0x67, 0x2e, 0x48, 0x75, 0x6e, 0x6b, 0x1a, 0x2b, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74,
+	0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65,
+	0x74, 0x2e, 0x67, 0x72, 0x70, 0x63, 0x2e, 0x65, 0x6e, 0x63, 0x6f, 0x64, 0x69, 0x6e, 0x67, 0x2e,
+	0x48, 0x75, 0x6e, 0x6b, 0x28, 0x01, 0x30, 0x01, 0x12, 0x72, 0x0a, 0x08, 0x54, 0x75, 0x6e, 0x4d,
+	0x75, 0x6c, 0x74, 0x69, 0x12, 0x30, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e,
+	0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x67,
+	0x72, 0x70, 0x63, 0x2e, 0x65, 0x6e, 0x63, 0x6f, 0x64, 0x69, 0x6e, 0x67, 0x2e, 0x4d, 0x75, 0x6c,
+	0x74, 0x69, 0x48, 0x75, 0x6e, 0x6b, 0x1a, 0x30, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72,
+	0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74,
+	0x2e, 0x67, 0x72, 0x70, 0x63, 0x2e, 0x65, 0x6e, 0x63, 0x6f, 0x64, 0x69, 0x6e, 0x67, 0x2e, 0x4d,
+	0x75, 0x6c, 0x74, 0x69, 0x48, 0x75, 0x6e, 0x6b, 0x28, 0x01, 0x30, 0x01, 0x42, 0x3c, 0x5a, 0x3a,
+	0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f,
+	0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70,
+	0x6f, 0x72, 0x74, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2f, 0x67, 0x72, 0x70,
+	0x63, 0x2f, 0x65, 0x6e, 0x63, 0x6f, 0x64, 0x69, 0x6e, 0x67, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74,
+	0x6f, 0x33,
+}
+
+var (
+	file_transport_internet_grpc_encoding_stream_proto_rawDescOnce sync.Once
+	file_transport_internet_grpc_encoding_stream_proto_rawDescData = file_transport_internet_grpc_encoding_stream_proto_rawDesc
+)
+
+func file_transport_internet_grpc_encoding_stream_proto_rawDescGZIP() []byte {
+	file_transport_internet_grpc_encoding_stream_proto_rawDescOnce.Do(func() {
+		file_transport_internet_grpc_encoding_stream_proto_rawDescData = protoimpl.X.CompressGZIP(file_transport_internet_grpc_encoding_stream_proto_rawDescData)
+	})
+	return file_transport_internet_grpc_encoding_stream_proto_rawDescData
+}
+
+var file_transport_internet_grpc_encoding_stream_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_transport_internet_grpc_encoding_stream_proto_goTypes = []interface{}{
+	(*Hunk)(nil),      // 0: xray.transport.internet.grpc.encoding.Hunk
+	(*MultiHunk)(nil), // 1: xray.transport.internet.grpc.encoding.MultiHunk
+}
+var file_transport_internet_grpc_encoding_stream_proto_depIdxs = []int32{
+	0, // 0: xray.transport.internet.grpc.encoding.GRPCService.Tun:input_type -> xray.transport.internet.grpc.encoding.Hunk
+	1, // 1: xray.transport.internet.grpc.encoding.GRPCService.TunMulti:input_type -> xray.transport.internet.grpc.encoding.MultiHunk
+	0, // 2: xray.transport.internet.grpc.encoding.GRPCService.Tun:output_type -> xray.transport.internet.grpc.encoding.Hunk
+	1, // 3: xray.transport.internet.grpc.encoding.GRPCService.TunMulti:output_type -> xray.transport.internet.grpc.encoding.MultiHunk
+	2, // [2:4] is the sub-list for method output_type
+	0, // [0:2] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_transport_internet_grpc_encoding_stream_proto_init() }
+func file_transport_internet_grpc_encoding_stream_proto_init() {
+	if File_transport_internet_grpc_encoding_stream_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_transport_internet_grpc_encoding_stream_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Hunk); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_transport_internet_grpc_encoding_stream_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*MultiHunk); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_transport_internet_grpc_encoding_stream_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   2,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_transport_internet_grpc_encoding_stream_proto_goTypes,
+		DependencyIndexes: file_transport_internet_grpc_encoding_stream_proto_depIdxs,
+		MessageInfos:      file_transport_internet_grpc_encoding_stream_proto_msgTypes,
+	}.Build()
+	File_transport_internet_grpc_encoding_stream_proto = out.File
+	file_transport_internet_grpc_encoding_stream_proto_rawDesc = nil
+	file_transport_internet_grpc_encoding_stream_proto_goTypes = nil
+	file_transport_internet_grpc_encoding_stream_proto_depIdxs = nil
+}

transport/internet/grpc/encoding/stream.proto

@@ -0,0 +1,17 @@
+syntax = "proto3";
+
+package xray.transport.internet.grpc.encoding;
+option go_package = "github.com/xtls/xray-core/transport/internet/grpc/encoding";
+
+message Hunk {
+  bytes data = 1;
+}
+
+message MultiHunk {
+   repeated bytes data = 1;
+}
+
+service GRPCService {
+  rpc Tun (stream Hunk) returns (stream Hunk);
+  rpc TunMulti (stream MultiHunk) returns (stream MultiHunk);
+}

transport/internet/grpc/encoding/stream_grpc.pb.go

@@ -0,0 +1,201 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+
+package encoding
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.32.0 or later.
+const _ = grpc.SupportPackageIsVersion7
+
+// GRPCServiceClient is the client API for GRPCService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type GRPCServiceClient interface {
+	Tun(ctx context.Context, opts ...grpc.CallOption) (GRPCService_TunClient, error)
+	TunMulti(ctx context.Context, opts ...grpc.CallOption) (GRPCService_TunMultiClient, error)
+}
+
+type gRPCServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewGRPCServiceClient(cc grpc.ClientConnInterface) GRPCServiceClient {
+	return &gRPCServiceClient{cc}
+}
+
+func (c *gRPCServiceClient) Tun(ctx context.Context, opts ...grpc.CallOption) (GRPCService_TunClient, error) {
+	stream, err := c.cc.NewStream(ctx, &GRPCService_ServiceDesc.Streams[0], "/xray.transport.internet.grpc.encoding.GRPCService/Tun", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &gRPCServiceTunClient{stream}
+	return x, nil
+}
+
+type GRPCService_TunClient interface {
+	Send(*Hunk) error
+	Recv() (*Hunk, error)
+	grpc.ClientStream
+}
+
+type gRPCServiceTunClient struct {
+	grpc.ClientStream
+}
+
+func (x *gRPCServiceTunClient) Send(m *Hunk) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *gRPCServiceTunClient) Recv() (*Hunk, error) {
+	m := new(Hunk)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *gRPCServiceClient) TunMulti(ctx context.Context, opts ...grpc.CallOption) (GRPCService_TunMultiClient, error) {
+	stream, err := c.cc.NewStream(ctx, &GRPCService_ServiceDesc.Streams[1], "/xray.transport.internet.grpc.encoding.GRPCService/TunMulti", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &gRPCServiceTunMultiClient{stream}
+	return x, nil
+}
+
+type GRPCService_TunMultiClient interface {
+	Send(*MultiHunk) error
+	Recv() (*MultiHunk, error)
+	grpc.ClientStream
+}
+
+type gRPCServiceTunMultiClient struct {
+	grpc.ClientStream
+}
+
+func (x *gRPCServiceTunMultiClient) Send(m *MultiHunk) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *gRPCServiceTunMultiClient) Recv() (*MultiHunk, error) {
+	m := new(MultiHunk)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// GRPCServiceServer is the server API for GRPCService service.
+// All implementations must embed UnimplementedGRPCServiceServer
+// for forward compatibility
+type GRPCServiceServer interface {
+	Tun(GRPCService_TunServer) error
+	TunMulti(GRPCService_TunMultiServer) error
+	mustEmbedUnimplementedGRPCServiceServer()
+}
+
+// UnimplementedGRPCServiceServer must be embedded to have forward compatible implementations.
+type UnimplementedGRPCServiceServer struct {
+}
+
+func (UnimplementedGRPCServiceServer) Tun(GRPCService_TunServer) error {
+	return status.Errorf(codes.Unimplemented, "method Tun not implemented")
+}
+func (UnimplementedGRPCServiceServer) TunMulti(GRPCService_TunMultiServer) error {
+	return status.Errorf(codes.Unimplemented, "method TunMulti not implemented")
+}
+func (UnimplementedGRPCServiceServer) mustEmbedUnimplementedGRPCServiceServer() {}
+
+// UnsafeGRPCServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to GRPCServiceServer will
+// result in compilation errors.
+type UnsafeGRPCServiceServer interface {
+	mustEmbedUnimplementedGRPCServiceServer()
+}
+
+func RegisterGRPCServiceServer(s grpc.ServiceRegistrar, srv GRPCServiceServer) {
+	s.RegisterService(&GRPCService_ServiceDesc, srv)
+}
+
+func _GRPCService_Tun_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(GRPCServiceServer).Tun(&gRPCServiceTunServer{stream})
+}
+
+type GRPCService_TunServer interface {
+	Send(*Hunk) error
+	Recv() (*Hunk, error)
+	grpc.ServerStream
+}
+
+type gRPCServiceTunServer struct {
+	grpc.ServerStream
+}
+
+func (x *gRPCServiceTunServer) Send(m *Hunk) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *gRPCServiceTunServer) Recv() (*Hunk, error) {
+	m := new(Hunk)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func _GRPCService_TunMulti_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(GRPCServiceServer).TunMulti(&gRPCServiceTunMultiServer{stream})
+}
+
+type GRPCService_TunMultiServer interface {
+	Send(*MultiHunk) error
+	Recv() (*MultiHunk, error)
+	grpc.ServerStream
+}
+
+type gRPCServiceTunMultiServer struct {
+	grpc.ServerStream
+}
+
+func (x *gRPCServiceTunMultiServer) Send(m *MultiHunk) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *gRPCServiceTunMultiServer) Recv() (*MultiHunk, error) {
+	m := new(MultiHunk)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// GRPCService_ServiceDesc is the grpc.ServiceDesc for GRPCService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var GRPCService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "xray.transport.internet.grpc.encoding.GRPCService",
+	HandlerType: (*GRPCServiceServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "Tun",
+			Handler:       _GRPCService_Tun_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+		{
+			StreamName:    "TunMulti",
+			Handler:       _GRPCService_TunMulti_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "transport/internet/grpc/encoding/stream.proto",
+}

transport/internet/grpc/errors.generated.go

@@ -0,0 +1,9 @@
+package grpc
+
+import "github.com/xtls/xray-core/common/errors"
+
+type errPathObjHolder struct{}
+
+func newError(values ...interface{}) *errors.Error {
+	return errors.New(values...).WithPathObj(errPathObjHolder{})
+}

transport/internet/grpc/grpc.go

@@ -0,0 +1,3 @@
+package grpc
+
+//go:generate go run github.com/xtls/xray-core/common/errors/errorgen

transport/internet/grpc/hub.go

@@ -0,0 +1,129 @@
+package grpc
+
+import (
+	"context"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+
+	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/transport/internet"
+	"github.com/xtls/xray-core/transport/internet/grpc/encoding"
+	"github.com/xtls/xray-core/transport/internet/tls"
+)
+
+type Listener struct {
+	encoding.UnimplementedGRPCServiceServer
+	ctx     context.Context
+	handler internet.ConnHandler
+	local   net.Addr
+	config  *Config
+	locker  *internet.FileLocker // for unix domain socket
+
+	s *grpc.Server
+}
+
+func (l Listener) Tun(server encoding.GRPCService_TunServer) error {
+	tunCtx, cancel := context.WithCancel(l.ctx)
+	l.handler(encoding.NewHunkConn(server, cancel))
+	<-tunCtx.Done()
+	return nil
+}
+
+func (l Listener) TunMulti(server encoding.GRPCService_TunMultiServer) error {
+	tunCtx, cancel := context.WithCancel(l.ctx)
+	l.handler(encoding.NewMultiHunkConn(server, cancel))
+	<-tunCtx.Done()
+	return nil
+}
+
+func (l Listener) Close() error {
+	l.s.Stop()
+	return nil
+}
+
+func (l Listener) Addr() net.Addr {
+	return l.local
+}
+
+func Listen(ctx context.Context, address net.Address, port net.Port, settings *internet.MemoryStreamConfig, handler internet.ConnHandler) (internet.Listener, error) {
+	grpcSettings := settings.ProtocolSettings.(*Config)
+	var listener *Listener
+	if port == net.Port(0) { // unix
+		listener = &Listener{
+			handler: handler,
+			local: &net.UnixAddr{
+				Name: address.Domain(),
+				Net:  "unix",
+			},
+			config: grpcSettings,
+		}
+	} else { // tcp
+		listener = &Listener{
+			handler: handler,
+			local: &net.TCPAddr{
+				IP:   address.IP(),
+				Port: int(port),
+			},
+			config: grpcSettings,
+		}
+	}
+
+	listener.ctx = ctx
+
+	config := tls.ConfigFromStreamSettings(settings)
+
+	var s *grpc.Server
+	if config == nil {
+		s = grpc.NewServer()
+	} else {
+		s = grpc.NewServer(grpc.Creds(credentials.NewTLS(config.GetTLSConfig(tls.WithNextProto("h2")))))
+	}
+	listener.s = s
+
+	if settings.SocketSettings != nil && settings.SocketSettings.AcceptProxyProtocol {
+		newError("accepting PROXY protocol").AtWarning().WriteToLog(session.ExportIDToError(ctx))
+	}
+
+	go func() {
+		var streamListener net.Listener
+		var err error
+		if port == net.Port(0) { // unix
+			streamListener, err = internet.ListenSystem(ctx, &net.UnixAddr{
+				Name: address.Domain(),
+				Net:  "unix",
+			}, settings.SocketSettings)
+			if err != nil {
+				newError("failed to listen on ", address).Base(err).AtError().WriteToLog(session.ExportIDToError(ctx))
+				return
+			}
+			locker := ctx.Value(address.Domain())
+			if locker != nil {
+				listener.locker = locker.(*internet.FileLocker)
+			}
+		} else { // tcp
+			streamListener, err = internet.ListenSystem(ctx, &net.TCPAddr{
+				IP:   address.IP(),
+				Port: int(port),
+			}, settings.SocketSettings)
+			if err != nil {
+				newError("failed to listen on ", address, ":", port).Base(err).AtError().WriteToLog(session.ExportIDToError(ctx))
+				return
+			}
+		}
+
+		encoding.RegisterGRPCServiceServerX(s, listener, grpcSettings.ServiceName)
+
+		if err = s.Serve(streamListener); err != nil {
+			newError("Listener for gRPC ended").Base(err).WriteToLog()
+		}
+	}()
+
+	return listener, nil
+}
+
+func init() {
+	common.Must(internet.RegisterTransportListener(protocolName, Listen))
+}

transport/internet/http/dialer.go

@@ -18,8 +18,13 @@ import (
 	"golang.org/x/net/http2"
 )
 
+type dialerConf struct {
+	net.Destination
+	*internet.SocketConfig
+}
+
 var (
-	globalDialerMap    map[net.Destination]*http.Client
+	globalDialerMap    map[dialerConf]*http.Client
 	globalDialerAccess sync.Mutex
 )
 
@@ -28,10 +33,10 @@ func getHTTPClient(ctx context.Context, dest net.Destination, tlsSettings *tls.C
 	defer globalDialerAccess.Unlock()
 
 	if globalDialerMap == nil {
-		globalDialerMap = make(map[net.Destination]*http.Client)
+		globalDialerMap = make(map[dialerConf]*http.Client)
 	}
 
-	if client, found := globalDialerMap[dest]; found {
+	if client, found := globalDialerMap[dialerConf{dest, sockopt}]; found {
 		return client, nil
 	}
 
@@ -87,7 +92,7 @@ func getHTTPClient(ctx context.Context, dest net.Destination, tlsSettings *tls.C
 		Transport: transport,
 	}
 
-	globalDialerMap[dest] = client
+	globalDialerMap[dialerConf{dest, sockopt}] = client
 	return client, nil
 }
 

transport/internet/http/hub.go

@@ -51,7 +51,7 @@ func (fw flushWriter) Write(p []byte) (n int, err error) {
 	}
 
 	n, err = fw.w.Write(p)
-	if f, ok := fw.w.(http.Flusher); ok {
+	if f, ok := fw.w.(http.Flusher); ok && err == nil {
 		f.Flush()
 	}
 	return

transport/internet/sockopt_darwin.go

@@ -15,13 +15,12 @@ const (
 
 func applyOutboundSocketOptions(network string, address string, fd uintptr, config *SocketConfig) error {
 	if isTCPSocket(network) {
-		switch config.Tfo {
-		case SocketConfig_Enable:
-			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, TCP_FASTOPEN, TCP_FASTOPEN_CLIENT); err != nil {
-				return err
-			}
-		case SocketConfig_Disable:
-			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, TCP_FASTOPEN, 0); err != nil {
+		tfo := config.Tfo
+		if tfo > 0 {
+			tfo = TCP_FASTOPEN_CLIENT
+		}
+		if tfo >= 0 {
+			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, TCP_FASTOPEN, int(tfo)); err != nil {
 				return err
 			}
 		}
@@ -32,13 +31,12 @@ func applyOutboundSocketOptions(network string, address string, fd uintptr, conf
 
 func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig) error {
 	if isTCPSocket(network) {
-		switch config.Tfo {
-		case SocketConfig_Enable:
-			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, TCP_FASTOPEN, TCP_FASTOPEN_SERVER); err != nil {
-				return err
-			}
-		case SocketConfig_Disable:
-			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, TCP_FASTOPEN, 0); err != nil {
+		tfo := config.Tfo
+		if tfo > 0 {
+			tfo = TCP_FASTOPEN_SERVER
+		}
+		if tfo >= 0 {
+			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, TCP_FASTOPEN, int(tfo)); err != nil {
 				return err
 			}
 		}

transport/internet/sockopt_freebsd.go

@@ -130,14 +130,13 @@ func applyOutboundSocketOptions(network string, address string, fd uintptr, conf
 	}
 
 	if isTCPSocket(network) {
-		switch config.Tfo {
-		case SocketConfig_Enable:
-			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, unix.TCP_FASTOPEN, 1); err != nil {
-				return newError("failed to set TCP_FASTOPEN_CONNECT=1").Base(err)
-			}
-		case SocketConfig_Disable:
-			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, unix.TCP_FASTOPEN, 0); err != nil {
-				return newError("failed to set TCP_FASTOPEN_CONNECT=0").Base(err)
+		tfo := int(config.Tfo)
+		if tfo > 0 {
+			tfo = 1
+		}
+		if tfo >= 0 {
+			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, unix.TCP_FASTOPEN, tfo); err != nil {
+				return newError("failed to set TCP_FASTOPEN_CONNECT=", tfo).Base(err)
 			}
 		}
 	}
@@ -164,14 +163,9 @@ func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig)
 		}
 	}
 	if isTCPSocket(network) {
-		switch config.Tfo {
-		case SocketConfig_Enable:
-			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, unix.TCP_FASTOPEN, 1); err != nil {
-				return newError("failed to set TCP_FASTOPEN=1").Base(err)
-			}
-		case SocketConfig_Disable:
-			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, unix.TCP_FASTOPEN, 0); err != nil {
-				return newError("failed to set TCP_FASTOPEN=0").Base(err)
+		if config.Tfo >= 0 {
+			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, unix.TCP_FASTOPEN, int(config.Tfo)); err != nil {
+				return newError("failed to set TCP_FASTOPEN=", config.Tfo).Base(err)
 			}
 		}
 	}