Add support for internal DNS system

https://github.com/XTLS/Xray-core/pull/3908#issuecomment-2696911994

Fixes https://github.com/XTLS/Xray-core/pull/3904 for good

app/dns/dns.go

@@ -210,6 +210,34 @@ func (s *DNS) LookupIP(domain string, option dns.IPOption) ([]net.IP, error) {
 	return nil, errors.New("returning nil for domain ", domain).Base(errors.Combine(errs...))
 }
 
+func (s *DNS) LookupHTTPS(domain string) (map[string]string, error) {
+	errs := []error{}
+	ctx := session.ContextWithInbound(s.ctx, &session.Inbound{Tag: s.tag})
+	for _, client := range s.sortClients(domain) {
+		if strings.EqualFold(client.Name(), "FakeDNS") {
+			errors.LogDebug(s.ctx, "skip DNS resolution for domain ", domain, " at server ", client.Name())
+			continue
+		}
+		EnhancedServer, ok := client.server.(EnhancedServer)
+		if !ok {
+			continue
+		}
+		HTTPSRecord, err := EnhancedServer.QueryHTTPS(ctx, domain, s.disableCache)
+		if len(HTTPSRecord) > 0 {
+			return HTTPSRecord, nil
+		}
+		if err != nil {
+			errors.LogInfoInner(s.ctx, err, "failed to lookup HTTPS for domain ", domain, " at server ", client.Name())
+			errs = append(errs, err)
+		}
+		// 5 for RcodeRefused in miekg/dns, hardcode to reduce binary size
+		if err != context.Canceled && err != context.DeadlineExceeded && err != errExpectedIPNonMatch && err != dns.ErrEmptyResponse && dns.RCodeFromError(err) != 5 {
+			return nil, err
+		}
+	}
+	return nil, errors.New("returning nil for domain ", domain).Base(errors.Combine(errs...))
+}
+
 // LookupHosts implements dns.HostsLookup.
 func (s *DNS) LookupHosts(domain string) *net.Address {
 	domain = strings.TrimSuffix(domain, ".")

app/dns/dnscommon.go

@@ -29,6 +29,12 @@ type record struct {
 	AAAA *IPRecord
 }
 
+type HTTPSRecord struct {
+	keypair map[string]string
+	Expire time.Time
+	RCode  dnsmessage.RCode
+}
+
 // IPRecord is a cacheable item for a resolved domain
 type IPRecord struct {
 	ReqID  uint16

app/dns/nameserver.go

@@ -23,6 +23,13 @@ type Server interface {
 	QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns.IPOption, disableCache bool) ([]net.IP, error)
 }
 
+// Server is the interface for Enhanced Name Server.
+type EnhancedServer interface {
+	Server
+	// QueryHTTPS sends HTTPS queries to its configured server.
+	QueryHTTPS(ctx context.Context, domain string, disableCache bool) (map[string]string, error)
+}
+
 // Client is the interface for DNS client.
 type Client struct {
 	server       Server
@@ -45,11 +52,13 @@ func NewServer(ctx context.Context, dest net.Destination, dispatcher routing.Dis
 		case strings.EqualFold(u.String(), "localhost"):
 			return NewLocalNameServer(queryStrategy), nil
 		case strings.EqualFold(u.Scheme, "https"): // DNS-over-HTTPS Remote mode
-			return NewDoHNameServer(u, dispatcher, queryStrategy, false)
+			return NewDoHNameServer(u, queryStrategy, dispatcher, false), nil
 		case strings.EqualFold(u.Scheme, "h2c"): // DNS-over-HTTPS h2c Remote mode
-			return NewDoHNameServer(u, dispatcher, queryStrategy, true)
+			return NewDoHNameServer(u, queryStrategy, dispatcher, true), nil
 		case strings.EqualFold(u.Scheme, "https+local"): // DNS-over-HTTPS Local mode
-			return NewDoHLocalNameServer(u, queryStrategy), nil
+			return NewDoHNameServer(u, queryStrategy, nil, false), nil
+		case strings.EqualFold(u.Scheme, "h2c+local"): // DNS-over-HTTPS h2c Local mode
+			return NewDoHNameServer(u, queryStrategy, nil, true), nil
 		case strings.EqualFold(u.Scheme, "quic+local"): // DNS-over-QUIC Local mode
 			return NewQUICNameServer(u, queryStrategy)
 		case strings.EqualFold(u.Scheme, "tcp"): // DNS-over-TCP Remote mode

app/dns/nameserver_doh.go

@@ -8,10 +8,14 @@ import (
 	"io"
 	"net/http"
 	"net/url"
+	"strings"
 	"sync"
 	"time"
 
+	mdns "github.com/miekg/dns"
+	utls "github.com/refraction-networking/utls"
 	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/crypto"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/log"
 	"github.com/xtls/xray-core/common/net"
@@ -31,7 +35,6 @@ import (
 // which is compatible with traditional dns over udp(RFC1035),
 // thus most of the DOH implementation is copied from udpns.go
 type DoHNameServer struct {
-	dispatcher routing.Dispatcher
 	sync.RWMutex
 	ips           map[string]*record
 	pub           *pubsub.Service
@@ -40,117 +43,89 @@ type DoHNameServer struct {
 	dohURL        string
 	name          string
 	queryStrategy QueryStrategy
+
+	HTTPSCache map[string]*HTTPSRecord
 }
 
-// NewDoHNameServer creates DOH server object for remote resolving.
+// NewDoHNameServer creates DOH/DOHL client object for remote/local resolving.
-func NewDoHNameServer(url *url.URL, dispatcher routing.Dispatcher, queryStrategy QueryStrategy, h2c bool) (*DoHNameServer, error) {
+func NewDoHNameServer(url *url.URL, queryStrategy QueryStrategy, dispatcher routing.Dispatcher, h2c bool) *DoHNameServer {
 	url.Scheme = "https"
-	errors.LogInfo(context.Background(), "DNS: created Remote DNS-over-HTTPS client for ", url.String(), ", with h2c ", h2c)
+	mode := "DOH"
-	s := baseDOHNameServer(url, "DOH", queryStrategy)
+	if dispatcher == nil {
-
+		mode = "DOHL"
-	s.dispatcher = dispatcher
-	dialContext := func(ctx context.Context, network, addr string) (net.Conn, error) {
-		dest, err := net.ParseDestination(network + ":" + addr)
-		if err != nil {
-			return nil, err
-		}
-		dnsCtx := toDnsContext(ctx, s.dohURL)
-		if h2c {
-			dnsCtx = session.ContextWithMitmAlpn11(dnsCtx, false) // for insurance
-			dnsCtx = session.ContextWithMitmServerName(dnsCtx, url.Hostname())
-		}
-		link, err := s.dispatcher.Dispatch(dnsCtx, 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
 	}
-
+	errors.LogInfo(context.Background(), "DNS: created ", mode, " client for ", url.String(), ", with h2c ", h2c)
-	s.httpClient = &http.Client{
-		Timeout: time.Second * 180,
-		Transport: &http.Transport{
-			MaxIdleConns:        30,
-			IdleConnTimeout:     90 * time.Second,
-			TLSHandshakeTimeout: 30 * time.Second,
-			ForceAttemptHTTP2:   true,
-			DialContext:         dialContext,
-		},
-	}
-	if h2c {
-		s.httpClient.Transport = &http2.Transport{
-			IdleConnTimeout: 90 * time.Second,
-			DialTLSContext: func(ctx context.Context, network, addr string, cfg *tls.Config) (net.Conn, error) {
-				return dialContext(ctx, network, addr)
-			},
-		}
-	}
-
-	return s, nil
-}
-
-// NewDoHLocalNameServer creates DOH client object for local resolving
-func NewDoHLocalNameServer(url *url.URL, queryStrategy QueryStrategy) *DoHNameServer {
-	url.Scheme = "https"
-	s := baseDOHNameServer(url, "DOHL", queryStrategy)
-	tr := &http.Transport{
-		IdleConnTimeout:   90 * 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
-			}
-			conn, err := internet.DialSystem(ctx, dest, nil)
-			log.Record(&log.AccessMessage{
-				From:   "DNS",
-				To:     s.dohURL,
-				Status: log.AccessAccepted,
-				Detour: "local",
-			})
-			if err != nil {
-				return nil, err
-			}
-			return conn, nil
-		},
-	}
-	s.httpClient = &http.Client{
-		Timeout:   time.Second * 180,
-		Transport: tr,
-	}
-	errors.LogInfo(context.Background(), "DNS: created Local DNS-over-HTTPS client for ", url.String())
-	return s
-}
-
-func baseDOHNameServer(url *url.URL, prefix string, queryStrategy QueryStrategy) *DoHNameServer {
 	s := &DoHNameServer{
 		ips:           make(map[string]*record),
 		pub:           pubsub.NewService(),
-		name:          prefix + "//" + url.Host,
+		name:          mode + "//" + url.Host,
 		dohURL:        url.String(),
 		queryStrategy: queryStrategy,
+		HTTPSCache:    make(map[string]*HTTPSRecord),
 	}
 	s.cleanup = &task.Periodic{
 		Interval: time.Minute,
 		Execute:  s.Cleanup,
 	}
+	s.httpClient = &http.Client{
+		Transport: &http2.Transport{
+			IdleConnTimeout: net.ConnIdleTimeout,
+			ReadIdleTimeout: net.ChromeH2KeepAlivePeriod,
+			DialTLSContext: func(ctx context.Context, network, addr string, cfg *tls.Config) (net.Conn, error) {
+				dest, err := net.ParseDestination(network + ":" + addr)
+				if err != nil {
+					return nil, err
+				}
+				var conn net.Conn
+				if dispatcher != nil {
+					dnsCtx := toDnsContext(ctx, s.dohURL)
+					if h2c {
+						dnsCtx = session.ContextWithMitmAlpn11(dnsCtx, false) // for insurance
+						dnsCtx = session.ContextWithMitmServerName(dnsCtx, url.Hostname())
+					}
+					link, err := dispatcher.Dispatch(dnsCtx, 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)
+					}
+					conn = cnc.NewConnection(
+						cnc.ConnectionInputMulti(link.Writer),
+						cnc.ConnectionOutputMulti(link.Reader),
+						cnc.ConnectionOnClose(cc),
+					)
+				} else {
+					log.Record(&log.AccessMessage{
+						From:   "DNS",
+						To:     s.dohURL,
+						Status: log.AccessAccepted,
+						Detour: "local",
+					})
+					conn, err = internet.DialSystem(ctx, dest, nil)
+					if err != nil {
+						return nil, err
+					}
+				}
+				if !h2c {
+					conn = utls.UClient(conn, &utls.Config{ServerName: url.Hostname()}, utls.HelloChrome_Auto)
+					if err := conn.(*utls.UConn).HandshakeContext(ctx); err != nil {
+						return nil, err
+					}
+				}
+				return conn, nil
+			},
+		},
+	}
 	return s
 }
 
@@ -236,6 +211,21 @@ func (s *DoHNameServer) updateIP(req *dnsRequest, ipRec *IPRecord) {
 	common.Must(s.cleanup.Start())
 }
 
+func (s *DoHNameServer) updateHTTPS(domain string, HTTPSRec *HTTPSRecord) {
+	s.Lock()
+	rec, found := s.HTTPSCache[domain]
+	if !found {
+		s.HTTPSCache[domain] = HTTPSRec
+	}
+	if found && rec.Expire.Before(time.Now()) {
+		s.HTTPSCache[domain] = HTTPSRec
+	}
+	errors.LogInfo(context.Background(), s.name, " got answer: ", domain, " ", "HTTPS", " -> ", HTTPSRec.keypair)
+
+	s.pub.Publish(domain+"HTTPS", nil)
+	s.Unlock()
+}
+
 func (s *DoHNameServer) newReqID() uint16 {
 	return 0
 }
@@ -300,6 +290,59 @@ func (s *DoHNameServer) sendQuery(ctx context.Context, domain string, clientIP n
 	}
 }
 
+func (s *DoHNameServer) sendHTTPSQuery(ctx context.Context, domain string) {
+	errors.LogInfo(ctx, s.name, " querying HTTPS record for: ", domain)
+	var deadline time.Time
+	if d, ok := ctx.Deadline(); ok {
+		deadline = d
+	} else {
+		deadline = time.Now().Add(time.Second * 5)
+	}
+	dnsCtx := ctx
+	// reserve internal dns server requested Inbound
+	if inbound := session.InboundFromContext(ctx); inbound != nil {
+		dnsCtx = session.ContextWithInbound(dnsCtx, inbound)
+	}
+	dnsCtx = session.ContextWithContent(dnsCtx, &session.Content{
+		Protocol:       "https",
+		SkipDNSResolve: true,
+	})
+	var cancel context.CancelFunc
+	dnsCtx, cancel = context.WithDeadline(dnsCtx, deadline)
+	defer cancel()
+
+	m := new(mdns.Msg)
+	m.SetQuestion(mdns.Fqdn(domain), mdns.TypeHTTPS)
+	m.Id = 0
+	msg, _ := m.Pack()
+	response, err := s.dohHTTPSContext(dnsCtx, msg)
+	if err != nil {
+		errors.LogError(ctx, err, "failed to retrieve HTTPS query response for ", domain)
+		return
+	}
+	respMsg := new(mdns.Msg)
+	err = respMsg.Unpack(response)
+	if err != nil {
+		errors.LogError(ctx, err, "failed to parse HTTPS query response for ", domain)
+		return
+	}
+	var Record = HTTPSRecord{
+		keypair: map[string]string{},
+	}
+	if len(respMsg.Answer) > 0 {
+		for _, answer := range respMsg.Answer {
+			if https, ok := answer.(*mdns.HTTPS); ok && https.Hdr.Name == mdns.Fqdn(domain) {
+				for _, value := range https.Value {
+					Record.keypair[value.Key().String()] = value.String()
+				}
+			}
+		}
+	}
+	Record.Expire = time.Now().Add(time.Duration(respMsg.Answer[0].Header().Ttl) * time.Second)
+
+	s.updateHTTPS(domain, &Record)
+}
+
 func (s *DoHNameServer) dohHTTPSContext(ctx context.Context, b []byte) ([]byte, error) {
 	body := bytes.NewBuffer(b)
 	req, err := http.NewRequest("POST", s.dohURL, body)
@@ -310,6 +353,8 @@ func (s *DoHNameServer) dohHTTPSContext(ctx context.Context, b []byte) ([]byte,
 	req.Header.Add("Accept", "application/dns-message")
 	req.Header.Add("Content-Type", "application/dns-message")
 
+	req.Header.Set("X-Padding", strings.Repeat("X", int(crypto.RandBetween(100, 1000))))
+
 	hc := s.httpClient
 
 	resp, err := hc.Do(req.WithContext(ctx))
@@ -368,6 +413,27 @@ func (s *DoHNameServer) findIPsForDomain(domain string, option dns_feature.IPOpt
 	return nil, errRecordNotFound
 }
 
+func (s *DoHNameServer) findRecordsForDomain(domain string, Querytype string) (any, error) {
+	switch Querytype {
+	case "HTTPS":
+		s.RLock()
+		record, found := s.HTTPSCache[domain]
+		s.RUnlock()
+		if !found {
+			return nil, errRecordNotFound
+		}
+		if len(record.keypair) == 0 {
+			return nil, dns_feature.ErrEmptyResponse
+		}
+		if record.Expire.Before(time.Now()) {
+			return nil, errRecordNotFound
+		}
+		return record, nil
+	default:
+		return nil, errors.New("unsupported query type: " + Querytype)
+	}
+}
+
 // QueryIP implements Server.
 func (s *DoHNameServer) QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption, disableCache bool) ([]net.IP, error) { // nolint: dupl
 	fqdn := Fqdn(domain)
@@ -430,3 +496,44 @@ func (s *DoHNameServer) QueryIP(ctx context.Context, domain string, clientIP net
 		}
 	}
 }
+
+// QueryHTTPS implements EnhancedServer.
+func (s *DoHNameServer) QueryHTTPS(ctx context.Context, domain string, disableCache bool) (map[string]string, error) { // nolint: dupl
+	fqdn := Fqdn(domain)
+
+	if disableCache {
+		errors.LogDebug(ctx, "DNS cache is disabled. Querying HTTPS for ", domain, " at ", s.name)
+	} else {
+		Record, err := s.findRecordsForDomain(fqdn, "HTTPS")
+		if err == nil || err == dns_feature.ErrEmptyResponse {
+			errors.LogDebugInner(ctx, err, s.name, " cache HIT ", domain, " -> ", Record.(HTTPSRecord).keypair)
+			return Record.(HTTPSRecord).keypair, err
+		}
+	}
+	sub := s.pub.Subscribe(fqdn + "HTTPS")
+	defer sub.Close()
+	done := make(chan interface{})
+	go func() {
+		if sub != nil {
+			select {
+			case <-sub.Wait():
+			case <-ctx.Done():
+			}
+		}
+		close(done)
+	}()
+	s.sendHTTPSQuery(ctx, fqdn)
+
+	for {
+		Record, err := s.findRecordsForDomain(fqdn, "HTTPS")
+		if err != errRecordNotFound {
+			return Record.(*HTTPSRecord).keypair, err
+		}
+
+		select {
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		case <-done:
+		}
+	}
+}

app/dns/nameserver_doh_test.go

@@ -17,7 +17,7 @@ func TestDOHNameServer(t *testing.T) {
 	url, err := url.Parse("https+local://1.1.1.1/dns-query")
 	common.Must(err)
 
-	s := NewDoHLocalNameServer(url, QueryStrategy_USE_IP)
+	s := NewDoHNameServer(url, QueryStrategy_USE_IP, nil, false)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
 	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns_feature.IPOption{
 		IPv4Enable: true,
@@ -34,7 +34,7 @@ func TestDOHNameServerWithCache(t *testing.T) {
 	url, err := url.Parse("https+local://1.1.1.1/dns-query")
 	common.Must(err)
 
-	s := NewDoHLocalNameServer(url, QueryStrategy_USE_IP)
+	s := NewDoHNameServer(url, QueryStrategy_USE_IP, nil, false)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
 	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns_feature.IPOption{
 		IPv4Enable: true,
@@ -62,7 +62,7 @@ func TestDOHNameServerWithIPv4Override(t *testing.T) {
 	url, err := url.Parse("https+local://1.1.1.1/dns-query")
 	common.Must(err)
 
-	s := NewDoHLocalNameServer(url, QueryStrategy_USE_IP4)
+	s := NewDoHNameServer(url, QueryStrategy_USE_IP4, nil, false)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
 	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns_feature.IPOption{
 		IPv4Enable: true,
@@ -85,7 +85,7 @@ func TestDOHNameServerWithIPv6Override(t *testing.T) {
 	url, err := url.Parse("https+local://1.1.1.1/dns-query")
 	common.Must(err)
 
-	s := NewDoHLocalNameServer(url, QueryStrategy_USE_IP6)
+	s := NewDoHNameServer(url, QueryStrategy_USE_IP6, nil, false)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
 	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns_feature.IPOption{
 		IPv4Enable: true,

app/proxyman/inbound/worker.go

@@ -324,6 +324,7 @@ func (w *udpWorker) callback(b *buf.Buffer, source net.Destination, originalDest
 			if w.sniffingConfig != nil {
 				content.SniffingRequest.Enabled = w.sniffingConfig.Enabled
 				content.SniffingRequest.OverrideDestinationForProtocol = w.sniffingConfig.DestinationOverride
+				content.SniffingRequest.ExcludeForDomain = w.sniffingConfig.DomainsExcluded
 				content.SniffingRequest.MetadataOnly = w.sniffingConfig.MetadataOnly
 				content.SniffingRequest.RouteOnly = w.sniffingConfig.RouteOnly
 			}

app/proxyman/outbound/handler.go

@@ -273,7 +273,16 @@ func (h *Handler) Dial(ctx context.Context, dest net.Destination) (stat.Connecti
 			outbounds := session.OutboundsFromContext(ctx)
 			ob := outbounds[len(outbounds)-1]
 			if h.senderSettings.ViaCidr == "" {
-				ob.Gateway = h.senderSettings.Via.AsAddress()
+				if h.senderSettings.Via.AsAddress().Family().IsDomain() && h.senderSettings.Via.AsAddress().Domain() == "origin" {
+					if inbound := session.InboundFromContext(ctx); inbound != nil {
+						origin, _, err := net.SplitHostPort(inbound.Conn.LocalAddr().String())
+						if err == nil {
+							ob.Gateway = net.ParseAddress(origin)
+						}
+					}
+				} else {
+					ob.Gateway = h.senderSettings.Via.AsAddress()
+				}
 			} else { //Get a random address.
 				ob.Gateway = ParseRandomIPv6(h.senderSettings.Via.AsAddress(), h.senderSettings.ViaCidr)
 			}

common/crypto/crypto.go

@@ -1,2 +1,15 @@
 // Package crypto provides common crypto libraries for Xray.
 package crypto // import "github.com/xtls/xray-core/common/crypto"
+
+import (
+	"crypto/rand"
+	"math/big"
+)
+
+func RandBetween(from int64, to int64) int64 {
+	if from == to {
+		return from
+	}
+	bigInt, _ := rand.Int(rand.Reader, big.NewInt(to-from))
+	return from + bigInt.Int64()
+}

common/mux/server.go

@@ -120,7 +120,7 @@ func (w *ServerWorker) handleStatusKeepAlive(meta *FrameMetadata, reader *buf.Bu
 func (w *ServerWorker) handleStatusNew(ctx context.Context, meta *FrameMetadata, reader *buf.BufferedReader) error {
 	// deep-clone outbounds because it is going to be mutated concurrently
 	// (Target and OriginalTarget)
-	ctx = session.ContextCloneOutbounds(ctx)
+	ctx = session.ContextCloneOutboundsAndContent(ctx)
 	errors.LogInfo(ctx, "received request for ", meta.Target)
 	{
 		msg := &log.AccessMessage{

common/net/net.go

@@ -1,2 +1,14 @@
 // Package net is a drop-in replacement to Golang's net package, with some more functionalities.
 package net // import "github.com/xtls/xray-core/common/net"
+
+import "time"
+
+// defines the maximum time an idle TCP session can survive in the tunnel, so
+// it should be consistent across HTTP versions and with other transports.
+const ConnIdleTimeout = 300 * time.Second
+
+// consistent with quic-go
+const QuicgoH3KeepAlivePeriod = 10 * time.Second
+
+// consistent with chrome
+const ChromeH2KeepAlivePeriod = 45 * time.Second

common/protocol/http/sniff.go

@@ -63,7 +63,7 @@ func SniffHTTP(b []byte, c context.Context) (*SniffHeader, error) {
 	ShouldSniffAttr := true
 	// If content.Attributes have information, that means it comes from HTTP inbound PlainHTTP mode.
 	// It will set attributes, so skip it.
-	if content == nil || content.AttributeLen() != 0 {
+	if content == nil || len(content.Attributes) != 0 {
 		ShouldSniffAttr = false
 	}
 	if err := beginWithHTTPMethod(b); err != nil {

common/session/context.go

@@ -42,7 +42,7 @@ func ContextWithOutbounds(ctx context.Context, outbounds []*Outbound) context.Co
 	return context.WithValue(ctx, outboundSessionKey, outbounds)
 }
 
-func ContextCloneOutbounds(ctx context.Context) context.Context {
+func ContextCloneOutboundsAndContent(ctx context.Context) context.Context {
 	outbounds := OutboundsFromContext(ctx)
 	newOutbounds := make([]*Outbound, len(outbounds))
 	for i, ob := range outbounds {
@@ -55,7 +55,15 @@ func ContextCloneOutbounds(ctx context.Context) context.Context {
 		newOutbounds[i] = &v
 	}
 
-	return ContextWithOutbounds(ctx, newOutbounds)
+	content := ContentFromContext(ctx)
+	newContent := Content{}
+	if content != nil {
+		newContent = *content
+		if content.Attributes != nil {
+			panic("content.Attributes != nil")
+		}
+	}
+	return ContextWithContent(ContextWithOutbounds(ctx, newOutbounds), &newContent)
 }
 
 func OutboundsFromContext(ctx context.Context) []*Outbound {

common/session/session.go

@@ -4,7 +4,6 @@ package session // import "github.com/xtls/xray-core/common/session"
 import (
 	"context"
 	"math/rand"
-	"sync"
 
 	c "github.com/xtls/xray-core/common/ctx"
 	"github.com/xtls/xray-core/common/errors"
@@ -75,8 +74,8 @@ type Outbound struct {
 
 // SniffingRequest controls the behavior of content sniffing.
 type SniffingRequest struct {
-	ExcludeForDomain               []string
+	ExcludeForDomain               []string // read-only once set
-	OverrideDestinationForProtocol []string
+	OverrideDestinationForProtocol []string // read-only once set
 	Enabled                        bool
 	MetadataOnly                   bool
 	RouteOnly                      bool
@@ -92,10 +91,6 @@ type Content struct {
 	Attributes map[string]string
 
 	SkipDNSResolve bool
-
-	mu sync.Mutex
-
-	isLocked bool
 }
 
 // Sockopt is the settings for socket connection.
@@ -104,22 +99,8 @@ type Sockopt struct {
 	Mark int32
 }
 
-// Some how when using mux, there will be a same ctx between different requests
-// This will cause problem as it's designed for single request, like concurrent map writes
-// Add a Mutex as a temp solution
-
 // SetAttribute attaches additional string attributes to content.
 func (c *Content) SetAttribute(name string, value string) {
-	if c.isLocked {
-		errors.LogError(context.Background(), "Multiple goroutines are tring to access one routing content, tring to write ", name, ":", value)
-	}
-	c.mu.Lock()
-	c.isLocked = true
-	defer func() {
-		c.isLocked = false
-		c.mu.Unlock()
-	}()
-
 	if c.Attributes == nil {
 		c.Attributes = make(map[string]string)
 	}
@@ -128,24 +109,8 @@ func (c *Content) SetAttribute(name string, value string) {
 
 // Attribute retrieves additional string attributes from content.
 func (c *Content) Attribute(name string) string {
-	c.mu.Lock()
-	c.isLocked = true
-	defer func() {
-		c.isLocked = false
-		c.mu.Unlock()
-	}()
 	if c.Attributes == nil {
 		return ""
 	}
 	return c.Attributes[name]
 }
-
-func (c *Content) AttributeLen() int {
-	c.mu.Lock()
-	c.isLocked = true
-	defer func() {
-		c.isLocked = false
-		c.mu.Unlock()
-	}()
-	return len(c.Attributes)
-}

core/core.go

@@ -18,8 +18,8 @@ import (
 
 var (
 	Version_x byte = 25
-	Version_y byte = 2
+	Version_y byte = 3
-	Version_z byte = 18
+	Version_z byte = 3
 )
 
 var (

features/dns/client.go

@@ -24,6 +24,13 @@ type Client interface {
 	LookupIP(domain string, option IPOption) ([]net.IP, error)
 }
 
+type EnhancedClient interface {
+	Client
+
+	// LookupHTTPS returns HTTPS records for the given domain.
+	LookupHTTPS(domain string) (map[string]string, error)
+}
+
 type HostsLookup interface {
 	LookupHosts(domain string) *net.Address
 }

go.mod

@@ -1,18 +1,18 @@
 module github.com/xtls/xray-core
 
-go 1.23
+go 1.24
 
 require (
-	github.com/OmarTariq612/goech v0.0.0-20240405204721-8e2e1dafd3a0
+	github.com/OmarTariq612/goech v0.0.1
 	github.com/cloudflare/circl v1.6.0
 	github.com/ghodss/yaml v1.0.1-0.20220118164431-d8423dcdf344
 	github.com/golang/mock v1.7.0-rc.1
-	github.com/google/go-cmp v0.6.0
+	github.com/google/go-cmp v0.7.0
 	github.com/gorilla/websocket v1.5.3
 	github.com/miekg/dns v1.1.63
 	github.com/pelletier/go-toml v1.9.5
 	github.com/pires/go-proxyproto v0.8.0
-	github.com/quic-go/quic-go v0.49.0
+	github.com/quic-go/quic-go v0.50.0
 	github.com/refraction-networking/utls v1.6.7
 	github.com/sagernet/sing v0.5.1
 	github.com/sagernet/sing-shadowsocks v0.2.7
@@ -22,7 +22,7 @@ require (
 	github.com/vishvananda/netlink v1.3.0
 	github.com/xtls/reality v0.0.0-20240712055506-48f0b2d5ed6d
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba
-	golang.org/x/crypto v0.33.0
+	golang.org/x/crypto v0.35.0
 	golang.org/x/net v0.35.0
 	golang.org/x/sync v0.11.0
 	golang.org/x/sys v0.30.0
@@ -31,7 +31,7 @@ require (
 	google.golang.org/protobuf v1.36.5
 	gvisor.dev/gvisor v0.0.0-20240320123526-dc6abceb7ff0
 	h12.io/socks v1.0.3
-	lukechampine.com/blake3 v1.3.0
+	lukechampine.com/blake3 v1.4.0
 )
 
 require (

go.sum

@@ -1,5 +1,5 @@
-github.com/OmarTariq612/goech v0.0.0-20240405204721-8e2e1dafd3a0 h1:Wo41lDOevRJSGpevP+8Pk5bANX7fJacO2w04aqLiC5I=
+github.com/OmarTariq612/goech v0.0.1 h1:/0c918Bk1ik65GXDj2k7SOK78DyZr30Jmq9euy1/HXg=
-github.com/OmarTariq612/goech v0.0.0-20240405204721-8e2e1dafd3a0/go.mod h1:FVGavL/QEBQDcBpr3fAojoK17xX5k9bicBphrOpP7uM=
+github.com/OmarTariq612/goech v0.0.1/go.mod h1:FVGavL/QEBQDcBpr3fAojoK17xX5k9bicBphrOpP7uM=
 github.com/andybalholm/brotli v1.1.0 h1:eLKJA0d02Lf0mVpIDgYnqXcUn0GqVmEFny3VuID1U3M=
 github.com/andybalholm/brotli v1.1.0/go.mod h1:sms7XGricyQI9K10gOSf56VKKWS4oLer58Q+mhRPtnY=
 github.com/cloudflare/circl v1.6.0 h1:cr5JKic4HI+LkINy2lg3W2jF8sHCVTBncJr5gIIq7qk=
@@ -24,8 +24,8 @@ github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek
 github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
 github.com/google/btree v1.1.2 h1:xf4v41cLI2Z6FxbKm+8Bu+m8ifhj15JuZ9sa0jZCMUU=
 github.com/google/btree v1.1.2/go.mod h1:qOPhT0dTNdNzV6Z/lhRX0YXUafgPLFUh+gZMl761Gm4=
-github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
-github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
 github.com/google/pprof v0.0.0-20240528025155-186aa0362fba h1:ql1qNgCyOB7iAEk8JTNM+zJrgIbnyCKX/wdlyPufP5g=
 github.com/google/pprof v0.0.0-20240528025155-186aa0362fba/go.mod h1:K1liHPHnj73Fdn/EKuT8nrFqBihUSKXoLYU0BuatOYo=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
@@ -54,8 +54,8 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/quic-go/qpack v0.5.1 h1:giqksBPnT/HDtZ6VhtFKgoLOWmlyo9Ei6u9PqzIMbhI=
 github.com/quic-go/qpack v0.5.1/go.mod h1:+PC4XFrEskIVkcLzpEkbLqq1uCoxPhQuvK5rH1ZgaEg=
-github.com/quic-go/quic-go v0.49.0 h1:w5iJHXwHxs1QxyBv1EHKuC50GX5to8mJAxvtnttJp94=
+github.com/quic-go/quic-go v0.50.0 h1:3H/ld1pa3CYhkcc20TPIyG1bNsdhn9qZBGN3b9/UyUo=
-github.com/quic-go/quic-go v0.49.0/go.mod h1:s2wDnmCdooUQBmQfpUSTCYBl1/D4FcqbULMMkASvR6s=
+github.com/quic-go/quic-go v0.50.0/go.mod h1:Vim6OmUvlYdwBhXP9ZVrtGmCMWa3wEqhq3NgYrI8b4E=
 github.com/refraction-networking/utls v1.6.7 h1:zVJ7sP1dJx/WtVuITug3qYUq034cDq9B2MR1K67ULZM=
 github.com/refraction-networking/utls v1.6.7/go.mod h1:BC3O4vQzye5hqpmDTWUqi4P5DDhzJfkV1tdqtawQIH0=
 github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3 h1:f/FNXud6gA3MNr8meMVVGxhp+QBTqY91tM8HjEuMjGg=
@@ -95,8 +95,8 @@ go4.org/netipx v0.0.0-20231129151722-fdeea329fbba h1:0b9z3AuHCjxk0x/opv64kcgZLBs
 go4.org/netipx v0.0.0-20231129151722-fdeea329fbba/go.mod h1:PLyyIXexvUFg3Owu6p/WfdlivPbZJsZdgWZlrGope/Y=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.33.0 h1:IOBPskki6Lysi0lo9qQvbxiQ+FvsCC/YWOecCHAixus=
+golang.org/x/crypto v0.35.0 h1:b15kiHdrGCHrP6LvwaQ3c03kgNhhiMgvlhxHQhmg2Xs=
-golang.org/x/crypto v0.33.0/go.mod h1:bVdXmD7IV/4GdElGPozy6U7lWdRXA4qyRVGJV57uQ5M=
+golang.org/x/crypto v0.35.0/go.mod h1:dy7dXNW32cAb/6/PRuTNsix8T+vJAqvuIy5Bli/x0YQ=
 golang.org/x/exp v0.0.0-20240531132922-fd00a4e0eefc h1:O9NuF4s+E/PvMIy+9IUZB9znFwUIXEWSstNjek6VpVg=
 golang.org/x/exp v0.0.0-20240531132922-fd00a4e0eefc/go.mod h1:XtvwrStGgqGPLc4cjQfWqZHG1YFdYs6swckp8vpsjnc=
 golang.org/x/mod v0.5.1/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro=
@@ -160,5 +160,5 @@ gvisor.dev/gvisor v0.0.0-20240320123526-dc6abceb7ff0 h1:P+U/06iIKPQ3DLcg+zBfSCia
 gvisor.dev/gvisor v0.0.0-20240320123526-dc6abceb7ff0/go.mod h1:NQHVAzMwvZ+Qe3ElSiHmq9RUm1MdNHpUZ52fiEqvn+0=
 h12.io/socks v1.0.3 h1:Ka3qaQewws4j4/eDQnOdpr4wXsC//dXtWvftlIcCQUo=
 h12.io/socks v1.0.3/go.mod h1:AIhxy1jOId/XCz9BO+EIgNL2rQiPTBNnOfnVnQ+3Eck=
-lukechampine.com/blake3 v1.3.0 h1:sJ3XhFINmHSrYCgl958hscfIa3bw8x4DqMP3u1YvoYE=
+lukechampine.com/blake3 v1.4.0 h1:xDbKOZCVbnZsfzM6mHSYcGRHZ3YrLDzqz8XnV4uaD5w=
-lukechampine.com/blake3 v1.3.0/go.mod h1:0OFRp7fBtAylGVCO40o87sbupkyIGgbpv1+M1k1LM6k=
+lukechampine.com/blake3 v1.4.0/go.mod h1:MQJNQCTnR+kwOP/JEZSxj3MaQjp80FOFSNMMHXcSeX0=

infra/conf/transport_internet.go

@@ -412,6 +412,8 @@ type TLSConfig struct {
 	MasterKeyLog                         string           `json:"masterKeyLog"`
 	ServerNameToVerify                   string           `json:"serverNameToVerify"`
 	VerifyPeerCertInNames                []string         `json:"verifyPeerCertInNames"`
+	ECHConfigList                        string           `json:"echConfigList"`
+	EchKeySets                           string           `json:"echKeySets"`
 }
 
 // Build implements Buildable.
@@ -483,6 +485,16 @@ func (c *TLSConfig) Build() (proto.Message, error) {
 	}
 	config.VerifyPeerCertInNames = c.VerifyPeerCertInNames
 
+	config.EchConfigList = c.ECHConfigList
+
+	if c.EchKeySets != "" {
+		EchPrivateKey, err := base64.StdEncoding.DecodeString(c.EchKeySets)
+		if err != nil {
+			return nil, errors.New("invalid ECH Config", c.EchKeySets)
+		}
+		config.EchKeySets = EchPrivateKey
+	}
+
 	return config, nil
 }
 
@@ -502,6 +514,7 @@ type REALITYConfig struct {
 
 	Fingerprint string `json:"fingerprint"`
 	ServerName  string `json:"serverName"`
+	Password    string `json:"password"`
 	PublicKey   string `json:"publicKey"`
 	ShortId     string `json:"shortId"`
 	SpiderX     string `json:"spiderX"`
@@ -610,11 +623,14 @@ func (c *REALITYConfig) Build() (proto.Message, error) {
 		if len(c.ServerNames) != 0 {
 			return nil, errors.New(`non-empty "serverNames", please use "serverName" instead`)
 		}
+		if c.Password != "" {
+			c.PublicKey = c.Password
+		}
 		if c.PublicKey == "" {
-			return nil, errors.New(`empty "publicKey"`)
+			return nil, errors.New(`empty "password"`)
 		}
 		if config.PublicKey, err = base64.RawURLEncoding.DecodeString(c.PublicKey); err != nil || len(config.PublicKey) != 32 {
-			return nil, errors.New(`invalid "publicKey": `, c.PublicKey)
+			return nil, errors.New(`invalid "password": `, c.PublicKey)
 		}
 		if len(c.ShortIds) != 0 {
 			return nil, errors.New(`non-empty "shortIds", please use "shortId" instead`)
@@ -711,6 +727,7 @@ type SocketConfig struct {
 	Interface            string                 `json:"interface"`
 	TcpMptcp             bool                   `json:"tcpMptcp"`
 	CustomSockopt        []*CustomSockoptConfig `json:"customSockopt"`
+	AddressPortStrategy  string                 `json:"addressPortStrategy"`
 }
 
 // Build implements Buildable.
@@ -780,6 +797,26 @@ func (c *SocketConfig) Build() (*internet.SocketConfig, error) {
 		customSockopts = append(customSockopts, customSockopt)
 	}
 
+	addressPortStrategy := internet.AddressPortStrategy_None
+	switch strings.ToLower(c.AddressPortStrategy) {
+	case "none", "":
+		addressPortStrategy = internet.AddressPortStrategy_None
+	case "srvportonly":
+		addressPortStrategy = internet.AddressPortStrategy_SrvPortOnly
+	case "srvaddressonly":
+		addressPortStrategy = internet.AddressPortStrategy_SrvAddressOnly
+	case "srvportandaddress":
+		addressPortStrategy = internet.AddressPortStrategy_SrvPortAndAddress
+	case "txtportonly":
+		addressPortStrategy = internet.AddressPortStrategy_TxtPortOnly
+	case "txtaddressonly":
+		addressPortStrategy = internet.AddressPortStrategy_TxtAddressOnly
+	case "txtportandaddress":
+		addressPortStrategy = internet.AddressPortStrategy_TxtPortAndAddress
+	default:
+		return nil, errors.New("unsupported address and port strategy: ", c.AddressPortStrategy)
+	}
+
 	return &internet.SocketConfig{
 		Mark:                 c.Mark,
 		Tfo:                  tfo,
@@ -798,6 +835,7 @@ func (c *SocketConfig) Build() (*internet.SocketConfig, error) {
 		Interface:            c.Interface,
 		TcpMptcp:             c.TcpMptcp,
 		CustomSockopt:        customSockopts,
+		AddressPortStrategy:  addressPortStrategy,
 	}, nil
 }
 

infra/conf/xray.go

@@ -292,7 +292,9 @@ func (c *OutboundDetourConfig) Build() (*core.OutboundHandlerConfig, error) {
 			senderSettings.ViaCidr = strings.Split(*c.SendThrough, "/")[1]
 		} else {
 			if address.Family().IsDomain() {
-				return nil, errors.New("unable to send through: " + address.String())
+				if address.Address.Domain() != "origin" {
+					return nil, errors.New("unable to send through: " + address.String())
+				}
 			}
 		}
 		senderSettings.Via = address.Build()

infra/vprotogen/main.go

@@ -89,12 +89,11 @@ func whichProtoc(suffix, targetedVersion string) (string, error) {
 
 	path, err := exec.LookPath(protoc)
 	if err != nil {
-		errStr := fmt.Sprintf(`
+		return "", fmt.Errorf(`
 Command "%s" not found.
 Make sure that %s is in your system path or current path.
 Download %s v%s or later from https://github.com/protocolbuffers/protobuf/releases
 `, protoc, protoc, protoc, targetedVersion)
-		return "", fmt.Errorf(errStr)
 	}
 	return path, nil
 }

main/commands/all/convert/json.go

@@ -50,17 +50,17 @@ func executeTypedMessageToJson(cmd *base.Command, args []string) {
 
 	reader, err := confloader.LoadConfig(cmd.Flag.Arg(0))
 	if err != nil {
-		base.Fatalf(err.Error())
+		base.Fatalf("failed to load config: %s", err)
 	}
 
 	b, err := io.ReadAll(reader)
 	if err != nil {
-		base.Fatalf(err.Error())
+		base.Fatalf("failed to read config: %s", err)
 	}
 
 	tm := cserial.TypedMessage{}
 	if err = json.Unmarshal(b, &tm); err != nil {
-		base.Fatalf(err.Error())
+		base.Fatalf("failed to unmarshal config: %s", err)
 	}
 
 	if j, ok := creflect.MarshalToJson(&tm, injectTypeInfo); ok {

main/commands/all/convert/protobuf.go

@@ -53,12 +53,12 @@ func executeConvertConfigsToProtobuf(cmd *base.Command, args []string) {
 	}
 
 	if len(unnamedArgs) < 1 {
-		base.Fatalf("empty config list")
+		base.Fatalf("invalid config list length: %d", len(unnamedArgs))
 	}
 
 	pbConfig, err := core.LoadConfig("auto", unnamedArgs)
 	if err != nil {
-		base.Fatalf(err.Error())
+		base.Fatalf("failed to load config: %s", err)
 	}
 
 	if optDump {

main/commands/all/tls/ech.go

@@ -1,10 +1,8 @@
 package tls
 
 import (
-	"encoding/json"
 	"encoding/pem"
 	"os"
-	"strings"
 
 	"github.com/OmarTariq612/goech"
 	"github.com/cloudflare/circl/hpke"
@@ -13,13 +11,13 @@ import (
 )
 
 var cmdECH = &base.Command{
-	UsageLine: `{{.Exec}} tls ech [--serverName (string)] [--json]`,
+	UsageLine: `{{.Exec}} tls ech [--serverName (string)] [--pem]`,
 	Short:     `Generate TLS-ECH certificates`,
 	Long: `
 Generate TLS-ECH certificates.
 
 Set serverName to your custom string: {{.Exec}} tls ech --serverName (string)
-Generate into json format: {{.Exec}} tls ech --json
+Generate into pem format: {{.Exec}} tls ech --pem
 `, // Enable PQ signature schemes: {{.Exec}} tls ech --pq-signature-schemes-enabled
 }
 
@@ -29,7 +27,7 @@ func init() {
 
 var input_pqSignatureSchemesEnabled = cmdECH.Flag.Bool("pqSignatureSchemesEnabled", false, "")
 var input_serverName = cmdECH.Flag.String("serverName", "cloudflare-ech.com", "")
-var input_json = cmdECH.Flag.Bool("json", false, "True == turn on json output")
+var input_pem = cmdECH.Flag.Bool("pem", false, "True == turn on pem output")
 
 func executeECH(cmd *base.Command, args []string) {
 	var kem hpke.KEM
@@ -40,30 +38,26 @@ func executeECH(cmd *base.Command, args []string) {
 		kem = hpke.KEM_X25519_HKDF_SHA256
 	}
 
-	echKeySet, err := goech.GenerateECHKeySet(0, *input_serverName, kem)
+	echKeySet, err := goech.GenerateECHKeySet(0, *input_serverName, kem, nil)
 	common.Must(err)
 
-	configBuffer, _ := echKeySet.ECHConfig.MarshalBinary()
+	// Make single key set to a list with only one element
-	keyBuffer, _ := echKeySet.MarshalBinary()
+	ECHConfigList := make(goech.ECHConfigList, 1)
+	ECHConfigList[0] = echKeySet.ECHConfig
+	ECHKeySetList := make(goech.ECHKeySetList, 1)
+	ECHKeySetList[0] = echKeySet
+	configBuffer, _ := ECHConfigList.MarshalBinary()
+	keyBuffer, _ := ECHKeySetList.MarshalBinary()
+	configStr, _ := ECHConfigList.ToBase64()
+	keySetStr, _ := ECHKeySetList.ToBase64()
 
 	configPEM := string(pem.EncodeToMemory(&pem.Block{Type: "ECH CONFIGS", Bytes: configBuffer}))
 	keyPEM := string(pem.EncodeToMemory(&pem.Block{Type: "ECH KEYS", Bytes: keyBuffer}))
-	if *input_json {
+	if *input_pem {
-		jECHConfigs := map[string]interface{}{
-			"configs": strings.Split(strings.TrimSpace(string(configPEM)), "\n"),
-		}
-		jECHKey := map[string]interface{}{
-			"key": strings.Split(strings.TrimSpace(string(keyPEM)), "\n"),
-		}
-
-		for _, i := range []map[string]interface{}{jECHConfigs, jECHKey} {
-			content, err := json.MarshalIndent(i, "", "  ")
-			common.Must(err)
-			os.Stdout.Write(content)
-			os.Stdout.WriteString("\n")
-		}
-	} else {
 		os.Stdout.WriteString(configPEM)
 		os.Stdout.WriteString(keyPEM)
+	} else {
+		os.Stdout.WriteString("ECH config list: \n" + configStr + "\n")
+		os.Stdout.WriteString("ECH Key sets: \n" + keySetStr + "\n")
 	}
 }

proxy/freedom/freedom.go

@@ -4,12 +4,12 @@ import (
 	"context"
 	"crypto/rand"
 	"io"
-	"math/big"
 	"time"
 
 	"github.com/pires/go-proxyproto"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
+	"github.com/xtls/xray-core/common/crypto"
 	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
@@ -414,7 +414,7 @@ func (w *NoisePacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
 				noise = n.Packet
 			} else {
 				//Random noise
-				noise, err = GenerateRandomBytes(randBetween(int64(n.LengthMin),
+				noise, err = GenerateRandomBytes(crypto.RandBetween(int64(n.LengthMin),
 					int64(n.LengthMax)))
 			}
 			if err != nil {
@@ -423,7 +423,7 @@ func (w *NoisePacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
 			w.Writer.WriteMultiBuffer(buf.MultiBuffer{buf.FromBytes(noise)})
 
 			if n.DelayMin != 0 || n.DelayMax != 0 {
-				time.Sleep(time.Duration(randBetween(int64(n.DelayMin), int64(n.DelayMax))) * time.Millisecond)
+				time.Sleep(time.Duration(crypto.RandBetween(int64(n.DelayMin), int64(n.DelayMax))) * time.Millisecond)
 			}
 		}
 
@@ -452,7 +452,7 @@ func (f *FragmentWriter) Write(b []byte) (int, error) {
 		buf := make([]byte, 1024)
 		var hello []byte
 		for from := 0; ; {
-			to := from + int(randBetween(int64(f.fragment.LengthMin), int64(f.fragment.LengthMax)))
+			to := from + int(crypto.RandBetween(int64(f.fragment.LengthMin), int64(f.fragment.LengthMax)))
 			if to > len(data) {
 				to = len(data)
 			}
@@ -466,7 +466,7 @@ func (f *FragmentWriter) Write(b []byte) (int, error) {
 				hello = append(hello, buf[:5+l]...)
 			} else {
 				_, err := f.writer.Write(buf[:5+l])
-				time.Sleep(time.Duration(randBetween(int64(f.fragment.IntervalMin), int64(f.fragment.IntervalMax))) * time.Millisecond)
+				time.Sleep(time.Duration(crypto.RandBetween(int64(f.fragment.IntervalMin), int64(f.fragment.IntervalMax))) * time.Millisecond)
 				if err != nil {
 					return 0, err
 				}
@@ -493,13 +493,13 @@ func (f *FragmentWriter) Write(b []byte) (int, error) {
 		return f.writer.Write(b)
 	}
 	for from := 0; ; {
-		to := from + int(randBetween(int64(f.fragment.LengthMin), int64(f.fragment.LengthMax)))
+		to := from + int(crypto.RandBetween(int64(f.fragment.LengthMin), int64(f.fragment.LengthMax)))
 		if to > len(b) {
 			to = len(b)
 		}
 		n, err := f.writer.Write(b[from:to])
 		from += n
-		time.Sleep(time.Duration(randBetween(int64(f.fragment.IntervalMin), int64(f.fragment.IntervalMax))) * time.Millisecond)
+		time.Sleep(time.Duration(crypto.RandBetween(int64(f.fragment.IntervalMin), int64(f.fragment.IntervalMax))) * time.Millisecond)
 		if err != nil {
 			return from, err
 		}
@@ -509,14 +509,6 @@ func (f *FragmentWriter) Write(b []byte) (int, error) {
 	}
 }
 
-// stolen from github.com/xtls/xray-core/transport/internet/reality
-func randBetween(left int64, right int64) int64 {
-	if left == right {
-		return left
-	}
-	bigInt, _ := rand.Int(rand.Reader, big.NewInt(right-left))
-	return left + bigInt.Int64()
-}
 func GenerateRandomBytes(n int64) ([]byte, error) {
 	b := make([]byte, n)
 	_, err := rand.Read(b)

proxy/proxy.go

@@ -547,8 +547,8 @@ func UnwrapRawConn(conn net.Conn) (net.Conn, stats.Counter, stats.Counter) {
 			conn = pc.Raw()
 			// 8192 > 4096, there is no need to process pc's bufReader
 		}
-		if uc, ok := conn.(*internet.UDSWrapperConn); ok {
+		if uc, ok := conn.(*internet.UnixConnWrapper); ok {
-			conn = uc.Conn
+			conn = uc.UnixConn
 		}
 	}
 	return conn, readCounter, writerCounter

transport/internet/config.pb.go

@@ -95,6 +95,67 @@ func (DomainStrategy) EnumDescriptor() ([]byte, []int) {
 	return file_transport_internet_config_proto_rawDescGZIP(), []int{0}
 }
 
+type AddressPortStrategy int32
+
+const (
+	AddressPortStrategy_None              AddressPortStrategy = 0
+	AddressPortStrategy_SrvPortOnly       AddressPortStrategy = 1
+	AddressPortStrategy_SrvAddressOnly    AddressPortStrategy = 2
+	AddressPortStrategy_SrvPortAndAddress AddressPortStrategy = 3
+	AddressPortStrategy_TxtPortOnly       AddressPortStrategy = 4
+	AddressPortStrategy_TxtAddressOnly    AddressPortStrategy = 5
+	AddressPortStrategy_TxtPortAndAddress AddressPortStrategy = 6
+)
+
+// Enum value maps for AddressPortStrategy.
+var (
+	AddressPortStrategy_name = map[int32]string{
+		0: "None",
+		1: "SrvPortOnly",
+		2: "SrvAddressOnly",
+		3: "SrvPortAndAddress",
+		4: "TxtPortOnly",
+		5: "TxtAddressOnly",
+		6: "TxtPortAndAddress",
+	}
+	AddressPortStrategy_value = map[string]int32{
+		"None":              0,
+		"SrvPortOnly":       1,
+		"SrvAddressOnly":    2,
+		"SrvPortAndAddress": 3,
+		"TxtPortOnly":       4,
+		"TxtAddressOnly":    5,
+		"TxtPortAndAddress": 6,
+	}
+)
+
+func (x AddressPortStrategy) Enum() *AddressPortStrategy {
+	p := new(AddressPortStrategy)
+	*p = x
+	return p
+}
+
+func (x AddressPortStrategy) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (AddressPortStrategy) Descriptor() protoreflect.EnumDescriptor {
+	return file_transport_internet_config_proto_enumTypes[1].Descriptor()
+}
+
+func (AddressPortStrategy) Type() protoreflect.EnumType {
+	return &file_transport_internet_config_proto_enumTypes[1]
+}
+
+func (x AddressPortStrategy) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use AddressPortStrategy.Descriptor instead.
+func (AddressPortStrategy) EnumDescriptor() ([]byte, []int) {
+	return file_transport_internet_config_proto_rawDescGZIP(), []int{1}
+}
+
 type SocketConfig_TProxyMode int32
 
 const (
@@ -131,11 +192,11 @@ func (x SocketConfig_TProxyMode) String() string {
 }
 
 func (SocketConfig_TProxyMode) Descriptor() protoreflect.EnumDescriptor {
-	return file_transport_internet_config_proto_enumTypes[1].Descriptor()
+	return file_transport_internet_config_proto_enumTypes[2].Descriptor()
 }
 
 func (SocketConfig_TProxyMode) Type() protoreflect.EnumType {
-	return &file_transport_internet_config_proto_enumTypes[1]
+	return &file_transport_internet_config_proto_enumTypes[2]
 }
 
 func (x SocketConfig_TProxyMode) Number() protoreflect.EnumNumber {
@@ -434,23 +495,24 @@ type SocketConfig struct {
 	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"`
+	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"`
+	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"`
+	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"`
+	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"`
+	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"`
+	DialerProxy                string              `protobuf:"bytes,9,opt,name=dialer_proxy,json=dialerProxy,proto3" json:"dialer_proxy,omitempty"`
-	TcpKeepAliveInterval       int32            `protobuf:"varint,10,opt,name=tcp_keep_alive_interval,json=tcpKeepAliveInterval,proto3" json:"tcp_keep_alive_interval,omitempty"`
+	TcpKeepAliveInterval       int32               `protobuf:"varint,10,opt,name=tcp_keep_alive_interval,json=tcpKeepAliveInterval,proto3" json:"tcp_keep_alive_interval,omitempty"`
-	TcpKeepAliveIdle           int32            `protobuf:"varint,11,opt,name=tcp_keep_alive_idle,json=tcpKeepAliveIdle,proto3" json:"tcp_keep_alive_idle,omitempty"`
+	TcpKeepAliveIdle           int32               `protobuf:"varint,11,opt,name=tcp_keep_alive_idle,json=tcpKeepAliveIdle,proto3" json:"tcp_keep_alive_idle,omitempty"`
-	TcpCongestion              string           `protobuf:"bytes,12,opt,name=tcp_congestion,json=tcpCongestion,proto3" json:"tcp_congestion,omitempty"`
+	TcpCongestion              string              `protobuf:"bytes,12,opt,name=tcp_congestion,json=tcpCongestion,proto3" json:"tcp_congestion,omitempty"`
-	Interface                  string           `protobuf:"bytes,13,opt,name=interface,proto3" json:"interface,omitempty"`
+	Interface                  string              `protobuf:"bytes,13,opt,name=interface,proto3" json:"interface,omitempty"`
-	V6Only                     bool             `protobuf:"varint,14,opt,name=v6only,proto3" json:"v6only,omitempty"`
+	V6Only                     bool                `protobuf:"varint,14,opt,name=v6only,proto3" json:"v6only,omitempty"`
-	TcpWindowClamp             int32            `protobuf:"varint,15,opt,name=tcp_window_clamp,json=tcpWindowClamp,proto3" json:"tcp_window_clamp,omitempty"`
+	TcpWindowClamp             int32               `protobuf:"varint,15,opt,name=tcp_window_clamp,json=tcpWindowClamp,proto3" json:"tcp_window_clamp,omitempty"`
-	TcpUserTimeout             int32            `protobuf:"varint,16,opt,name=tcp_user_timeout,json=tcpUserTimeout,proto3" json:"tcp_user_timeout,omitempty"`
+	TcpUserTimeout             int32               `protobuf:"varint,16,opt,name=tcp_user_timeout,json=tcpUserTimeout,proto3" json:"tcp_user_timeout,omitempty"`
-	TcpMaxSeg                  int32            `protobuf:"varint,17,opt,name=tcp_max_seg,json=tcpMaxSeg,proto3" json:"tcp_max_seg,omitempty"`
+	TcpMaxSeg                  int32               `protobuf:"varint,17,opt,name=tcp_max_seg,json=tcpMaxSeg,proto3" json:"tcp_max_seg,omitempty"`
-	Penetrate                  bool             `protobuf:"varint,18,opt,name=penetrate,proto3" json:"penetrate,omitempty"`
+	Penetrate                  bool                `protobuf:"varint,18,opt,name=penetrate,proto3" json:"penetrate,omitempty"`
-	TcpMptcp                   bool             `protobuf:"varint,19,opt,name=tcp_mptcp,json=tcpMptcp,proto3" json:"tcp_mptcp,omitempty"`
+	TcpMptcp                   bool                `protobuf:"varint,19,opt,name=tcp_mptcp,json=tcpMptcp,proto3" json:"tcp_mptcp,omitempty"`
-	CustomSockopt              []*CustomSockopt `protobuf:"bytes,20,rep,name=customSockopt,proto3" json:"customSockopt,omitempty"`
+	CustomSockopt              []*CustomSockopt    `protobuf:"bytes,20,rep,name=customSockopt,proto3" json:"customSockopt,omitempty"`
+	AddressPortStrategy        AddressPortStrategy `protobuf:"varint,21,opt,name=address_port_strategy,json=addressPortStrategy,proto3,enum=xray.transport.internet.AddressPortStrategy" json:"address_port_strategy,omitempty"`
 }
 
 func (x *SocketConfig) Reset() {
@@ -623,6 +685,13 @@ func (x *SocketConfig) GetCustomSockopt() []*CustomSockopt {
 	return nil
 }
 
+func (x *SocketConfig) GetAddressPortStrategy() AddressPortStrategy {
+	if x != nil {
+		return x.AddressPortStrategy
+	}
+	return AddressPortStrategy_None
+}
+
 var File_transport_internet_config_proto protoreflect.FileDescriptor
 
 var file_transport_internet_config_proto_rawDesc = []byte{
@@ -678,7 +747,7 @@ var file_transport_internet_config_proto_rawDesc = []byte{
 	0x28, 0x09, 0x52, 0x03, 0x6f, 0x70, 0x74, 0x12, 0x14, 0x0a, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65,
 	0x18, 0x03, 0x20, 0x01, 0x28, 0x09, 0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x12, 0x12, 0x0a,
 	0x04, 0x74, 0x79, 0x70, 0x65, 0x18, 0x04, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x74, 0x79, 0x70,
-	0x65, 0x22, 0x9b, 0x07, 0x0a, 0x0c, 0x53, 0x6f, 0x63, 0x6b, 0x65, 0x74, 0x43, 0x6f, 0x6e, 0x66,
+	0x65, 0x22, 0xfd, 0x07, 0x0a, 0x0c, 0x53, 0x6f, 0x63, 0x6b, 0x65, 0x74, 0x43, 0x6f, 0x6e, 0x66,
 	0x69, 0x67, 0x12, 0x12, 0x0a, 0x04, 0x6d, 0x61, 0x72, 0x6b, 0x18, 0x01, 0x20, 0x01, 0x28, 0x05,
 	0x52, 0x04, 0x6d, 0x61, 0x72, 0x6b, 0x12, 0x10, 0x0a, 0x03, 0x74, 0x66, 0x6f, 0x18, 0x02, 0x20,
 	0x01, 0x28, 0x05, 0x52, 0x03, 0x74, 0x66, 0x6f, 0x12, 0x48, 0x0a, 0x06, 0x74, 0x70, 0x72, 0x6f,
@@ -732,28 +801,44 @@ var file_transport_internet_config_proto_rawDesc = []byte{
 	0x74, 0x18, 0x14, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x26, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74,
 	0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65,
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+	0x0d, 0x63, 0x75, 0x73, 0x74, 0x6f, 0x6d, 0x53, 0x6f, 0x63, 0x6b, 0x6f, 0x70, 0x74, 0x12, 0x60,
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-	0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72,
+	0x0d, 0x0a, 0x09, 0x46, 0x4f, 0x52, 0x43, 0x45, 0x5f, 0x49, 0x50, 0x34, 0x10, 0x07, 0x12, 0x0d,
-	0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72,
+	0x0a, 0x09, 0x46, 0x4f, 0x52, 0x43, 0x45, 0x5f, 0x49, 0x50, 0x36, 0x10, 0x08, 0x12, 0x0e, 0x0a,
-	0x74, 0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0xaa, 0x02, 0x17, 0x58, 0x72, 0x61,
+	0x0a, 0x46, 0x4f, 0x52, 0x43, 0x45, 0x5f, 0x49, 0x50, 0x34, 0x36, 0x10, 0x09, 0x12, 0x0e, 0x0a,
-	0x79, 0x2e, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x49, 0x6e, 0x74, 0x65,
+	0x0a, 0x46, 0x4f, 0x52, 0x43, 0x45, 0x5f, 0x49, 0x50, 0x36, 0x34, 0x10, 0x0a, 0x2a, 0x97, 0x01,
-	0x72, 0x6e, 0x65, 0x74, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x0a, 0x13, 0x41, 0x64, 0x64, 0x72, 0x65, 0x73, 0x73, 0x50, 0x6f, 0x72, 0x74, 0x53, 0x74, 0x72,
+	0x61, 0x74, 0x65, 0x67, 0x79, 0x12, 0x08, 0x0a, 0x04, 0x4e, 0x6f, 0x6e, 0x65, 0x10, 0x00, 0x12,
+	0x0f, 0x0a, 0x0b, 0x53, 0x72, 0x76, 0x50, 0x6f, 0x72, 0x74, 0x4f, 0x6e, 0x6c, 0x79, 0x10, 0x01,
+	0x12, 0x12, 0x0a, 0x0e, 0x53, 0x72, 0x76, 0x41, 0x64, 0x64, 0x72, 0x65, 0x73, 0x73, 0x4f, 0x6e,
+	0x6c, 0x79, 0x10, 0x02, 0x12, 0x15, 0x0a, 0x11, 0x53, 0x72, 0x76, 0x50, 0x6f, 0x72, 0x74, 0x41,
+	0x6e, 0x64, 0x41, 0x64, 0x64, 0x72, 0x65, 0x73, 0x73, 0x10, 0x03, 0x12, 0x0f, 0x0a, 0x0b, 0x54,
+	0x78, 0x74, 0x50, 0x6f, 0x72, 0x74, 0x4f, 0x6e, 0x6c, 0x79, 0x10, 0x04, 0x12, 0x12, 0x0a, 0x0e,
+	0x54, 0x78, 0x74, 0x41, 0x64, 0x64, 0x72, 0x65, 0x73, 0x73, 0x4f, 0x6e, 0x6c, 0x79, 0x10, 0x05,
+	0x12, 0x15, 0x0a, 0x11, 0x54, 0x78, 0x74, 0x50, 0x6f, 0x72, 0x74, 0x41, 0x6e, 0x64, 0x41, 0x64,
+	0x64, 0x72, 0x65, 0x73, 0x73, 0x10, 0x06, 0x42, 0x67, 0x0a, 0x1b, 0x63, 0x6f, 0x6d, 0x2e, 0x78,
+	0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e,
+	0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x50, 0x01, 0x5a, 0x2c, 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, 0xaa, 0x02, 0x17, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x54, 0x72,
+	0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74,
+	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -768,33 +853,35 @@ func file_transport_internet_config_proto_rawDescGZIP() []byte {
 	return file_transport_internet_config_proto_rawDescData
 }
 
-var file_transport_internet_config_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
+var file_transport_internet_config_proto_enumTypes = make([]protoimpl.EnumInfo, 3)
 var file_transport_internet_config_proto_msgTypes = make([]protoimpl.MessageInfo, 5)
 var file_transport_internet_config_proto_goTypes = []any{
 	(DomainStrategy)(0),          // 0: xray.transport.internet.DomainStrategy
-	(SocketConfig_TProxyMode)(0), // 1: xray.transport.internet.SocketConfig.TProxyMode
+	(AddressPortStrategy)(0),     // 1: xray.transport.internet.AddressPortStrategy
-	(*TransportConfig)(nil),      // 2: xray.transport.internet.TransportConfig
+	(SocketConfig_TProxyMode)(0), // 2: xray.transport.internet.SocketConfig.TProxyMode
-	(*StreamConfig)(nil),         // 3: xray.transport.internet.StreamConfig
+	(*TransportConfig)(nil),      // 3: xray.transport.internet.TransportConfig
-	(*ProxyConfig)(nil),          // 4: xray.transport.internet.ProxyConfig
+	(*StreamConfig)(nil),         // 4: xray.transport.internet.StreamConfig
-	(*CustomSockopt)(nil),        // 5: xray.transport.internet.CustomSockopt
+	(*ProxyConfig)(nil),          // 5: xray.transport.internet.ProxyConfig
-	(*SocketConfig)(nil),         // 6: xray.transport.internet.SocketConfig
+	(*CustomSockopt)(nil),        // 6: xray.transport.internet.CustomSockopt
-	(*serial.TypedMessage)(nil),  // 7: xray.common.serial.TypedMessage
+	(*SocketConfig)(nil),         // 7: xray.transport.internet.SocketConfig
-	(*net.IPOrDomain)(nil),       // 8: xray.common.net.IPOrDomain
+	(*serial.TypedMessage)(nil),  // 8: xray.common.serial.TypedMessage
+	(*net.IPOrDomain)(nil),       // 9: xray.common.net.IPOrDomain
 }
 var file_transport_internet_config_proto_depIdxs = []int32{
-	7, // 0: xray.transport.internet.TransportConfig.settings:type_name -> xray.common.serial.TypedMessage
+	8, // 0: xray.transport.internet.TransportConfig.settings:type_name -> xray.common.serial.TypedMessage
-	8, // 1: xray.transport.internet.StreamConfig.address:type_name -> xray.common.net.IPOrDomain
+	9, // 1: xray.transport.internet.StreamConfig.address:type_name -> xray.common.net.IPOrDomain
-	2, // 2: xray.transport.internet.StreamConfig.transport_settings:type_name -> xray.transport.internet.TransportConfig
+	3, // 2: xray.transport.internet.StreamConfig.transport_settings:type_name -> xray.transport.internet.TransportConfig
-	7, // 3: xray.transport.internet.StreamConfig.security_settings:type_name -> xray.common.serial.TypedMessage
+	8, // 3: xray.transport.internet.StreamConfig.security_settings:type_name -> xray.common.serial.TypedMessage
-	6, // 4: xray.transport.internet.StreamConfig.socket_settings:type_name -> xray.transport.internet.SocketConfig
+	7, // 4: xray.transport.internet.StreamConfig.socket_settings:type_name -> xray.transport.internet.SocketConfig
-	1, // 5: xray.transport.internet.SocketConfig.tproxy:type_name -> xray.transport.internet.SocketConfig.TProxyMode
+	2, // 5: xray.transport.internet.SocketConfig.tproxy:type_name -> xray.transport.internet.SocketConfig.TProxyMode
 	0, // 6: xray.transport.internet.SocketConfig.domain_strategy:type_name -> xray.transport.internet.DomainStrategy
-	5, // 7: xray.transport.internet.SocketConfig.customSockopt:type_name -> xray.transport.internet.CustomSockopt
+	6, // 7: xray.transport.internet.SocketConfig.customSockopt:type_name -> xray.transport.internet.CustomSockopt
-	8, // [8:8] is the sub-list for method output_type
+	1, // 8: xray.transport.internet.SocketConfig.address_port_strategy:type_name -> xray.transport.internet.AddressPortStrategy
-	8, // [8:8] is the sub-list for method input_type
+	9, // [9:9] is the sub-list for method output_type
-	8, // [8:8] is the sub-list for extension type_name
+	9, // [9:9] is the sub-list for method input_type
-	8, // [8:8] is the sub-list for extension extendee
+	9, // [9:9] is the sub-list for extension type_name
-	0, // [0:8] is the sub-list for field type_name
+	9, // [9:9] is the sub-list for extension extendee
+	0, // [0:9] is the sub-list for field type_name
 }
 
 func init() { file_transport_internet_config_proto_init() }
@@ -807,7 +894,7 @@ func file_transport_internet_config_proto_init() {
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_transport_internet_config_proto_rawDesc,
-			NumEnums:      2,
+			NumEnums:      3,
 			NumMessages:   5,
 			NumExtensions: 0,
 			NumServices:   0,

transport/internet/config.proto

@@ -23,6 +23,16 @@ enum DomainStrategy {
   FORCE_IP64 = 10;
 }
 
+enum AddressPortStrategy {
+  None = 0;
+  SrvPortOnly = 1;
+  SrvAddressOnly = 2;
+  SrvPortAndAddress = 3;
+  TxtPortOnly = 4;
+  TxtAddressOnly = 5;
+  TxtPortAndAddress = 6;
+}
+
 message TransportConfig {
   // Transport protocol name.
   string protocol_name = 3;
@@ -116,4 +126,6 @@ message SocketConfig {
   bool tcp_mptcp = 19;
 
   repeated CustomSockopt customSockopt = 20;
+
+  AddressPortStrategy address_port_strategy = 21;
 }

transport/internet/dialer.go

@@ -2,6 +2,9 @@ package internet
 
 import (
 	"context"
+	"fmt"
+	gonet "net"
+	"strings"
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/dice"
@@ -103,6 +106,14 @@ func lookupIP(domain string, strategy DomainStrategy, localAddr net.Address) ([]
 	return ips, err
 }
 
+func LookupHTTPS(domain string) (map[string]string, error) {
+	if dnsClient == nil {
+		return nil, nil
+	}
+	HTTPSRecord, err := dnsClient.(dns.EnhancedClient).LookupHTTPS(domain)
+	return HTTPSRecord, err
+}
+
 func canLookupIP(ctx context.Context, dst net.Destination, sockopt *SocketConfig) bool {
 	if dst.Address.Family().IsIP() || dnsClient == nil {
 		return false
@@ -140,6 +151,93 @@ func redirect(ctx context.Context, dst net.Destination, obt string) net.Conn {
 	return nil
 }
 
+func checkAddressPortStrategy(ctx context.Context, dest net.Destination, sockopt *SocketConfig) (*net.Destination, error) {
+	if sockopt.AddressPortStrategy == AddressPortStrategy_None {
+		return nil, nil
+	}
+	newDest := dest
+	var OverridePort, OverrideAddress bool
+	var OverrideBy string
+	switch sockopt.AddressPortStrategy {
+	case AddressPortStrategy_SrvPortOnly:
+		OverridePort = true
+		OverrideAddress = false
+		OverrideBy = "srv"
+	case AddressPortStrategy_SrvAddressOnly:
+		OverridePort = false
+		OverrideAddress = true
+		OverrideBy = "srv"
+	case AddressPortStrategy_SrvPortAndAddress:
+		OverridePort = true
+		OverrideAddress = true
+		OverrideBy = "srv"
+	case AddressPortStrategy_TxtPortOnly:
+		OverridePort = true
+		OverrideAddress = false
+		OverrideBy = "txt"
+	case AddressPortStrategy_TxtAddressOnly:
+		OverridePort = false
+		OverrideAddress = true
+		OverrideBy = "txt"
+	case AddressPortStrategy_TxtPortAndAddress:
+		OverridePort = true
+		OverrideAddress = true
+		OverrideBy = "txt"
+	default:
+		return nil, errors.New("unknown AddressPortStrategy")
+	}
+
+	if !dest.Address.Family().IsDomain() {
+		return nil, nil
+	}
+
+	if OverrideBy == "srv" {
+		errors.LogDebug(ctx, "query SRV record for "+dest.Address.String())
+		parts := strings.SplitN(dest.Address.String(), ".", 3)
+		if len(parts) != 3 {
+			return nil, errors.New("invalid address format", dest.Address.String())
+		}
+		_, srvRecords, err := gonet.DefaultResolver.LookupSRV(context.Background(), parts[0][1:], parts[1][1:], parts[2])
+		if err != nil {
+			return nil, errors.New("failed to lookup SRV record").Base(err)
+		}
+		errors.LogDebug(ctx, "SRV record: "+fmt.Sprintf("addr=%s, port=%d, priority=%d, weight=%d", srvRecords[0].Target, srvRecords[0].Port, srvRecords[0].Priority, srvRecords[0].Weight))
+		if OverridePort {
+			newDest.Port = net.Port(srvRecords[0].Port)
+		}
+		if OverrideAddress {
+			newDest.Address = net.ParseAddress(srvRecords[0].Target)
+		}
+		return &newDest, nil
+	}
+	if OverrideBy == "txt" {
+		errors.LogDebug(ctx, "query TXT record for "+dest.Address.String())
+		txtRecords, err := gonet.DefaultResolver.LookupTXT(ctx, dest.Address.String())
+		if err != nil {
+			errors.LogError(ctx, "failed to lookup SRV record: "+err.Error())
+			return nil, errors.New("failed to lookup SRV record").Base(err)
+		}
+		for _, txtRecord := range txtRecords {
+			errors.LogDebug(ctx, "TXT record: "+txtRecord)
+			addr_s, port_s, _ := net.SplitHostPort(string(txtRecord))
+			addr := net.ParseAddress(addr_s)
+			port, err := net.PortFromString(port_s)
+			if err != nil {
+				continue
+			}
+
+			if OverridePort {
+				newDest.Port = port
+			}
+			if OverrideAddress {
+				newDest.Address = addr
+			}
+			return &newDest, nil
+		}
+	}
+	return nil, nil
+}
+
 // DialSystem calls system dialer to create a network connection.
 func DialSystem(ctx context.Context, dest net.Destination, sockopt *SocketConfig) (net.Conn, error) {
 	var src net.Address
@@ -152,6 +250,11 @@ func DialSystem(ctx context.Context, dest net.Destination, sockopt *SocketConfig
 		return effectiveSystemDialer.Dial(ctx, src, dest, sockopt)
 	}
 
+	if newDest, err := checkAddressPortStrategy(ctx, dest, sockopt); err == nil && newDest != nil {
+		errors.LogInfo(ctx, "replace destination with "+newDest.String())
+		dest = *newDest
+	}
+
 	if canLookupIP(ctx, dest, sockopt) {
 		ips, err := lookupIP(dest.Address.String(), sockopt.DomainStrategy, src)
 		if err == nil && len(ips) > 0 {

transport/internet/reality/reality.go

@@ -8,7 +8,6 @@ import (
 	"crypto/ecdh"
 	"crypto/ed25519"
 	"crypto/hmac"
-	"crypto/rand"
 	"crypto/sha256"
 	"crypto/sha512"
 	gotls "crypto/tls"
@@ -16,7 +15,6 @@ import (
 	"encoding/binary"
 	"fmt"
 	"io"
-	"math/big"
 	"net/http"
 	"reflect"
 	"regexp"
@@ -27,6 +25,7 @@ import (
 
 	utls "github.com/refraction-networking/utls"
 	"github.com/xtls/reality"
+	"github.com/xtls/xray-core/common/crypto"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/core"
@@ -213,13 +212,13 @@ func UClient(c net.Conn, config *Config, ctx context.Context, dest net.Destinati
 				}
 				times := 1
 				if !first {
-					times = int(randBetween(config.SpiderY[4], config.SpiderY[5]))
+					times = int(crypto.RandBetween(config.SpiderY[4], config.SpiderY[5]))
 				}
 				for j := 0; j < times; j++ {
 					if !first && j == 0 {
 						req.Header.Set("Referer", firstURL)
 					}
-					req.AddCookie(&http.Cookie{Name: "padding", Value: strings.Repeat("0", int(randBetween(config.SpiderY[0], config.SpiderY[1])))})
+					req.AddCookie(&http.Cookie{Name: "padding", Value: strings.Repeat("0", int(crypto.RandBetween(config.SpiderY[0], config.SpiderY[1])))})
 					if resp, err = client.Do(req); err != nil {
 						break
 					}
@@ -243,18 +242,18 @@ func UClient(c net.Conn, config *Config, ctx context.Context, dest net.Destinati
 					}
 					maps.Unlock()
 					if !first {
-						time.Sleep(time.Duration(randBetween(config.SpiderY[6], config.SpiderY[7])) * time.Millisecond) // interval
+						time.Sleep(time.Duration(crypto.RandBetween(config.SpiderY[6], config.SpiderY[7])) * time.Millisecond) // interval
 					}
 				}
 			}
 			get(true)
-			concurrency := int(randBetween(config.SpiderY[2], config.SpiderY[3]))
+			concurrency := int(crypto.RandBetween(config.SpiderY[2], config.SpiderY[3]))
 			for i := 0; i < concurrency; i++ {
 				go get(false)
 			}
 			// Do not close the connection
 		}()
-		time.Sleep(time.Duration(randBetween(config.SpiderY[8], config.SpiderY[9])) * time.Millisecond) // return
+		time.Sleep(time.Duration(crypto.RandBetween(config.SpiderY[8], config.SpiderY[9])) * time.Millisecond) // return
 		return nil, errors.New("REALITY: processed invalid connection").AtWarning()
 	}
 	return uConn, nil
@@ -271,7 +270,7 @@ var maps struct {
 }
 
 func getPathLocked(paths map[string]struct{}) string {
-	stopAt := int(randBetween(0, int64(len(paths)-1)))
+	stopAt := int(crypto.RandBetween(0, int64(len(paths)-1)))
 	i := 0
 	for s := range paths {
 		if i == stopAt {
@@ -281,11 +280,3 @@ func getPathLocked(paths map[string]struct{}) string {
 	}
 	return "/"
 }
-
-func randBetween(left int64, right int64) int64 {
-	if left == right {
-		return left
-	}
-	bigInt, _ := rand.Int(rand.Reader, big.NewInt(right-left))
-	return left + bigInt.Int64()
-}

transport/internet/splithttp/config.go

@@ -1,13 +1,12 @@
 package splithttp
 
 import (
-	"crypto/rand"
-	"math/big"
 	"net/http"
 	"net/url"
 	"strings"
 
 	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/crypto"
 	"github.com/xtls/xray-core/transport/internet"
 )
 
@@ -184,9 +183,5 @@ func init() {
 }
 
 func (c RangeConfig) rand() int32 {
-	if c.From == c.To {
+	return int32(crypto.RandBetween(int64(c.From), int64(c.To)))
-		return c.From
-	}
-	bigInt, _ := rand.Int(rand.Reader, big.NewInt(int64(c.To-c.From)))
-	return c.From + int32(bigInt.Int64())
 }

transport/internet/splithttp/dialer.go

@@ -30,16 +30,6 @@ import (
 	"golang.org/x/net/http2"
 )
 
-// defines the maximum time an idle TCP session can survive in the tunnel, so
-// it should be consistent across HTTP versions and with other transports.
-const connIdleTimeout = 300 * time.Second
-
-// consistent with quic-go
-const quicgoH3KeepAlivePeriod = 10 * time.Second
-
-// consistent with chrome
-const chromeH2KeepAlivePeriod = 45 * time.Second
-
 type dialerConf struct {
 	net.Destination
 	*internet.MemoryStreamConfig
@@ -154,13 +144,13 @@ func createHTTPClient(dest net.Destination, streamSettings *internet.MemoryStrea
 
 	if httpVersion == "3" {
 		if keepAlivePeriod == 0 {
-			keepAlivePeriod = quicgoH3KeepAlivePeriod
+			keepAlivePeriod = net.QuicgoH3KeepAlivePeriod
 		}
 		if keepAlivePeriod < 0 {
 			keepAlivePeriod = 0
 		}
 		quicConfig := &quic.Config{
-			MaxIdleTimeout: connIdleTimeout,
+			MaxIdleTimeout: net.ConnIdleTimeout,
 
 			// these two are defaults of quic-go/http3. the default of quic-go (no
 			// http3) is different, so it is hardcoded here for clarity.
@@ -168,7 +158,7 @@ func createHTTPClient(dest net.Destination, streamSettings *internet.MemoryStrea
 			MaxIncomingStreams: -1,
 			KeepAlivePeriod:    keepAlivePeriod,
 		}
-		transport = &http3.RoundTripper{
+		transport = &http3.Transport{
 			QUICConfig:      quicConfig,
 			TLSClientConfig: gotlsConfig,
 			Dial: func(ctx context.Context, addr string, tlsCfg *gotls.Config, cfg *quic.Config) (quic.EarlyConnection, error) {
@@ -198,7 +188,7 @@ func createHTTPClient(dest net.Destination, streamSettings *internet.MemoryStrea
 						return nil, err
 					}
 				default:
-					udpConn = &internet.FakePacketConn{c}
+					udpConn = &internet.FakePacketConn{Conn: c}
 					udpAddr, err = net.ResolveUDPAddr("udp", c.RemoteAddr().String())
 					if err != nil {
 						return nil, err
@@ -210,7 +200,7 @@ func createHTTPClient(dest net.Destination, streamSettings *internet.MemoryStrea
 		}
 	} else if httpVersion == "2" {
 		if keepAlivePeriod == 0 {
-			keepAlivePeriod = chromeH2KeepAlivePeriod
+			keepAlivePeriod = net.ChromeH2KeepAlivePeriod
 		}
 		if keepAlivePeriod < 0 {
 			keepAlivePeriod = 0
@@ -219,7 +209,7 @@ func createHTTPClient(dest net.Destination, streamSettings *internet.MemoryStrea
 			DialTLSContext: func(ctxInner context.Context, network string, addr string, cfg *gotls.Config) (net.Conn, error) {
 				return dialContext(ctxInner)
 			},
-			IdleConnTimeout: connIdleTimeout,
+			IdleConnTimeout: net.ConnIdleTimeout,
 			ReadIdleTimeout: keepAlivePeriod,
 		}
 	} else {
@@ -230,7 +220,7 @@ func createHTTPClient(dest net.Destination, streamSettings *internet.MemoryStrea
 		transport = &http.Transport{
 			DialTLSContext:  httpDialContext,
 			DialContext:     httpDialContext,
-			IdleConnTimeout: connIdleTimeout,
+			IdleConnTimeout: net.ConnIdleTimeout,
 			// chunked transfer download with KeepAlives is buggy with
 			// http.Client and our custom dial context.
 			DisableKeepAlives: true,

transport/internet/splithttp/hub.go

@@ -24,8 +24,6 @@ import (
 	"github.com/xtls/xray-core/transport/internet/reality"
 	"github.com/xtls/xray-core/transport/internet/stat"
 	"github.com/xtls/xray-core/transport/internet/tls"
-	"golang.org/x/net/http2"
-	"golang.org/x/net/http2/h2c"
 )
 
 type requestHandler struct {
@@ -47,21 +45,6 @@ type httpSession struct {
 	isFullyConnected *done.Instance
 }
 
-func (h *requestHandler) maybeReapSession(isFullyConnected *done.Instance, sessionId string) {
-	shouldReap := done.New()
-	go func() {
-		time.Sleep(30 * time.Second)
-		shouldReap.Close()
-	}()
-
-	select {
-	case <-isFullyConnected.Wait():
-		return
-	case <-shouldReap.Wait():
-		h.sessions.Delete(sessionId)
-	}
-}
-
 func (h *requestHandler) upsertSession(sessionId string) *httpSession {
 	// fast path
 	currentSessionAny, ok := h.sessions.Load(sessionId)
@@ -84,7 +67,21 @@ func (h *requestHandler) upsertSession(sessionId string) *httpSession {
 	}
 
 	h.sessions.Store(sessionId, s)
-	go h.maybeReapSession(s.isFullyConnected, sessionId)
+
+	shouldReap := done.New()
+	go func() {
+		time.Sleep(30 * time.Second)
+		shouldReap.Close()
+	}()
+	go func() {
+		select {
+		case <-shouldReap.Wait():
+			h.sessions.Delete(sessionId)
+			s.uploadQueue.Close()
+		case <-s.isFullyConnected.Wait():
+		}
+	}()
+
 	return s
 }
 
@@ -183,12 +180,13 @@ func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Req
 				writer.WriteHeader(http.StatusBadRequest)
 				return
 			}
-			uploadDone := done.New()
+			httpSC := &httpServerConn{
+				Instance:       done.New(),
+				Reader:         request.Body,
+				ResponseWriter: writer,
+			}
 			err = currentSession.uploadQueue.Push(Packet{
-				Reader: &httpRequestBodyReader{
+				Reader: httpSC,
-					requestReader: request.Body,
-					uploadDone:    uploadDone,
-				},
 			})
 			if err != nil {
 				errors.LogInfoInner(context.Background(), err, "failed to upload (PushReader)")
@@ -200,25 +198,21 @@ func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Req
 				scStreamUpServerSecs := h.config.GetNormalizedScStreamUpServerSecs()
 				if referrer != "" && scStreamUpServerSecs.To > 0 {
 					go func() {
-						defer func() {
-							recover()
-						}()
 						for {
-							_, err := writer.Write(bytes.Repeat([]byte{'X'}, int(h.config.GetNormalizedXPaddingBytes().rand())))
+							_, err := httpSC.Write(bytes.Repeat([]byte{'X'}, int(h.config.GetNormalizedXPaddingBytes().rand())))
 							if err != nil {
 								break
 							}
-							writer.(http.Flusher).Flush()
 							time.Sleep(time.Duration(scStreamUpServerSecs.rand()) * time.Second)
 						}
 					}()
 				}
 				select {
 				case <-request.Context().Done():
-				case <-uploadDone.Wait():
+				case <-httpSC.Wait():
 				}
 			}
-			uploadDone.Close()
+			httpSC.Close()
 			return
 		}
 
@@ -262,11 +256,6 @@ func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Req
 
 		writer.WriteHeader(http.StatusOK)
 	} else if request.Method == "GET" || sessionId == "" { // stream-down, stream-one
-		responseFlusher, ok := writer.(http.Flusher)
-		if !ok {
-			panic("expected http.ResponseWriter to be an http.Flusher")
-		}
-
 		if sessionId != "" {
 			// after GET is done, the connection is finished. disable automatic
 			// session reaping, and handle it in defer
@@ -287,20 +276,18 @@ func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Req
 		}
 
 		writer.WriteHeader(http.StatusOK)
+		writer.(http.Flusher).Flush()
 
-		responseFlusher.Flush()
+		httpSC := &httpServerConn{
-
+			Instance:       done.New(),
-		downloadDone := done.New()
+			Reader:         request.Body,
-
+			ResponseWriter: writer,
+		}
 		conn := splitConn{
-			writer: &httpResponseBodyWriter{
+			writer:     httpSC,
-				responseWriter:  writer,
+			reader:     httpSC,
-				downloadDone:    downloadDone,
-				responseFlusher: responseFlusher,
-			},
-			reader:     request.Body,
-			localAddr:  h.localAddr,
 			remoteAddr: remoteAddr,
+			localAddr:  h.localAddr,
 		}
 		if sessionId != "" { // if not stream-one
 			conn.reader = currentSession.uploadQueue
@@ -311,7 +298,7 @@ func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Req
 		// "A ResponseWriter may not be used after [Handler.ServeHTTP] has returned."
 		select {
 		case <-request.Context().Done():
-		case <-downloadDone.Wait():
+		case <-httpSC.Wait():
 		}
 
 		conn.Close()
@@ -321,45 +308,30 @@ func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Req
 	}
 }
 
-type httpRequestBodyReader struct {
+type httpServerConn struct {
-	requestReader io.ReadCloser
-	uploadDone    *done.Instance
-}
-
-func (c *httpRequestBodyReader) Read(b []byte) (int, error) {
-	return c.requestReader.Read(b)
-}
-
-func (c *httpRequestBodyReader) Close() error {
-	defer c.uploadDone.Close()
-	return c.requestReader.Close()
-}
-
-type httpResponseBodyWriter struct {
 	sync.Mutex
-	responseWriter  http.ResponseWriter
+	*done.Instance
-	responseFlusher http.Flusher
+	io.Reader // no need to Close request.Body
-	downloadDone    *done.Instance
+	http.ResponseWriter
 }
 
-func (c *httpResponseBodyWriter) Write(b []byte) (int, error) {
+func (c *httpServerConn) Write(b []byte) (int, error) {
 	c.Lock()
 	defer c.Unlock()
-	if c.downloadDone.Done() {
+	if c.Done() {
 		return 0, io.ErrClosedPipe
 	}
-	n, err := c.responseWriter.Write(b)
+	n, err := c.ResponseWriter.Write(b)
 	if err == nil {
-		c.responseFlusher.Flush()
+		c.ResponseWriter.(http.Flusher).Flush()
 	}
 	return n, err
 }
 
-func (c *httpResponseBodyWriter) Close() error {
+func (c *httpServerConn) Close() error {
 	c.Lock()
 	defer c.Unlock()
-	c.downloadDone.Close()
+	return c.Instance.Close()
-	return nil
 }
 
 type Listener struct {
@@ -452,11 +424,15 @@ func ListenXH(ctx context.Context, address net.Address, port net.Port, streamSet
 
 		handler.localAddr = l.listener.Addr()
 
-		// h2cHandler can handle both plaintext HTTP/1.1 and h2c
+		// server can handle both plaintext HTTP/1.1 and h2c
+		protocols := new(http.Protocols)
+		protocols.SetHTTP1(true)
+		protocols.SetUnencryptedHTTP2(true)
 		l.server = http.Server{
-			Handler:           h2c.NewHandler(handler, &http2.Server{}),
+			Handler:           handler,
 			ReadHeaderTimeout: time.Second * 4,
 			MaxHeaderBytes:    8192,
+			Protocols:         protocols,
 		}
 		go func() {
 			if err := l.server.Serve(l.listener); err != nil {

transport/internet/splithttp/splithttp_test.go

@@ -3,10 +3,8 @@ package splithttp_test
 import (
 	"context"
 	"crypto/rand"
-	gotls "crypto/tls"
 	"fmt"
 	"io"
-	gonet "net"
 	"net/http"
 	"runtime"
 	"testing"
@@ -23,7 +21,6 @@ import (
 	. "github.com/xtls/xray-core/transport/internet/splithttp"
 	"github.com/xtls/xray-core/transport/internet/stat"
 	"github.com/xtls/xray-core/transport/internet/tls"
-	"golang.org/x/net/http2"
 )
 
 func Test_ListenXHAndDial(t *testing.T) {
@@ -201,17 +198,11 @@ func Test_ListenXHAndDial_H2C(t *testing.T) {
 	common.Must(err)
 	defer listen.Close()
 
+	protocols := new(http.Protocols)
+	protocols.SetUnencryptedHTTP2(true)
 	client := http.Client{
-		Transport: &http2.Transport{
+		Transport: &http.Transport{
-			// So http2.Transport doesn't complain the URL scheme isn't 'https'
+			Protocols: protocols,
-			AllowHTTP: true,
-			// even with AllowHTTP, http2.Transport will attempt to establish
-			// the connection using DialTLSContext. Disable TLS with custom
-			// dial context.
-			DialTLSContext: func(ctx context.Context, network, addr string, cfg *gotls.Config) (gonet.Conn, error) {
-				var d gonet.Dialer
-				return d.DialContext(ctx, network, addr)
-			},
 		},
 	}
 

transport/internet/splithttp/upload_queue.go

@@ -20,6 +20,7 @@ type Packet struct {
 
 type uploadQueue struct {
 	reader          io.ReadCloser
+	nomore          bool
 	pushedPackets   chan Packet
 	writeCloseMutex sync.Mutex
 	heap            uploadHeap
@@ -42,19 +43,15 @@ func (h *uploadQueue) Push(p Packet) error {
 	h.writeCloseMutex.Lock()
 	defer h.writeCloseMutex.Unlock()
 
-	runtime.Gosched()
-	if h.reader != nil && p.Reader != nil {
-		p.Reader.Close()
-		return errors.New("h.reader already exists")
-	}
-
 	if h.closed {
-		if p.Reader != nil {
-			p.Reader.Close()
-		}
 		return errors.New("packet queue closed")
 	}
-
+	if h.nomore {
+		return errors.New("h.reader already exists")
+	}
+	if p.Reader != nil {
+		h.nomore = true
+	}
 	h.pushedPackets <- p
 	return nil
 }
@@ -65,9 +62,20 @@ func (h *uploadQueue) Close() error {
 
 	if !h.closed {
 		h.closed = true
+		runtime.Gosched() // hope Read() gets the packet
+	f:
+		for {
+			select {
+			case p := <-h.pushedPackets:
+				if p.Reader != nil {
+					h.reader = p.Reader
+				}
+			default:
+				break f
+			}
+		}
 		close(h.pushedPackets)
 	}
-	runtime.Gosched()
 	if h.reader != nil {
 		return h.reader.Close()
 	}

transport/internet/system_listener.go

@@ -44,32 +44,32 @@ func getControlFunc(ctx context.Context, sockopt *SocketConfig, controllers []co
 // For some reason, other component of ray will assume the listener is a TCP listener and have valid remote address.
 // But in fact it doesn't. So we need to wrap the listener to make it return 0.0.0.0(unspecified) as remote address.
 // If other issues encountered, we should able to fix it here.
-type listenUDSWrapper struct {
+type UnixListenerWrapper struct {
-	net.Listener
+	*net.UnixListener
 	locker *FileLocker
 }
 
-func (l *listenUDSWrapper) Accept() (net.Conn, error) {
+func (l *UnixListenerWrapper) Accept() (net.Conn, error) {
-	conn, err := l.Listener.Accept()
+	conn, err := l.UnixListener.Accept()
 	if err != nil {
 		return nil, err
 	}
-	return &UDSWrapperConn{Conn: conn}, nil
+	return &UnixConnWrapper{UnixConn: conn.(*net.UnixConn)}, nil
 }
 
-func (l *listenUDSWrapper) Close() error {
+func (l *UnixListenerWrapper) Close() error {
 	if l.locker != nil {
 		l.locker.Release()
 		l.locker = nil
 	}
-	return l.Listener.Close()
+	return l.UnixListener.Close()
 }
 
-type UDSWrapperConn struct {
+type UnixConnWrapper struct {
-	net.Conn
+	*net.UnixConn
 }
 
-func (conn *UDSWrapperConn) RemoteAddr() net.Addr {
+func (conn *UnixConnWrapper) RemoteAddr() net.Addr {
 	return &net.TCPAddr{
 		IP: []byte{0, 0, 0, 0},
 	}
@@ -136,7 +136,7 @@ func (dl *DefaultListener) Listen(ctx context.Context, addr net.Addr, sockopt *S
 					locker.Release()
 					return nil, err
 				}
-				l = &listenUDSWrapper{Listener: l, locker: locker}
+				l = &UnixListenerWrapper{UnixListener: l.(*net.UnixListener), locker: locker}
 				if filePerm == nil {
 					return l, nil
 				}

transport/internet/tls/config.go

@@ -444,6 +444,12 @@ func (c *Config) GetTLSConfig(opts ...Option) *tls.Config {
 			config.KeyLogWriter = writer
 		}
 	}
+	if len(c.EchConfigList) > 0 || len(c.EchKeySets) > 0 {
+		err := ApplyECH(c, config)
+		if err != nil {
+			errors.LogError(context.Background(), err)
+		}
+	}
 
 	return config
 }

transport/internet/tls/config.pb.go

@@ -207,7 +207,7 @@ type Config struct {
 	// @Critical
 	PinnedPeerCertificateChainSha256 [][]byte `protobuf:"bytes,13,rep,name=pinned_peer_certificate_chain_sha256,json=pinnedPeerCertificateChainSha256,proto3" json:"pinned_peer_certificate_chain_sha256,omitempty"`
 	// @Document Some certificate public key sha256 hashes.
-	// @Document After normal validation (required), if the verified cert's public key hash does not match any of these values, the connection will be aborted.
+	// @Document After normal validation (required), if one of certs in verified chain matches one of these values, the connection will be eventually accepted.
 	// @Critical
 	PinnedPeerCertificatePublicKeySha256 [][]byte `protobuf:"bytes,14,rep,name=pinned_peer_certificate_public_key_sha256,json=pinnedPeerCertificatePublicKeySha256,proto3" json:"pinned_peer_certificate_public_key_sha256,omitempty"`
 	MasterKeyLog                         string   `protobuf:"bytes,15,opt,name=master_key_log,json=masterKeyLog,proto3" json:"master_key_log,omitempty"`
@@ -217,6 +217,8 @@ type Config struct {
 	// @Document After allow_insecure (automatically), if the server's cert can't be verified by any of these names, pinned_peer_certificate_chain_sha256 will be tried.
 	// @Critical
 	VerifyPeerCertInNames []string `protobuf:"bytes,17,rep,name=verify_peer_cert_in_names,json=verifyPeerCertInNames,proto3" json:"verify_peer_cert_in_names,omitempty"`
+	EchConfigList         string   `protobuf:"bytes,18,opt,name=ech_config_list,json=echConfigList,proto3" json:"ech_config_list,omitempty"`
+	EchKeySets            []byte   `protobuf:"bytes,19,opt,name=ech_key_sets,json=echKeySets,proto3" json:"ech_key_sets,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -361,6 +363,20 @@ func (x *Config) GetVerifyPeerCertInNames() []string {
 	return nil
 }
 
+func (x *Config) GetEchConfigList() string {
+	if x != nil {
+		return x.EchConfigList
+	}
+	return ""
+}
+
+func (x *Config) GetEchKeySets() []byte {
+	if x != nil {
+		return x.EchKeySets
+	}
+	return nil
+}
+
 var File_transport_internet_tls_config_proto protoreflect.FileDescriptor
 
 var file_transport_internet_tls_config_proto_rawDesc = []byte{
@@ -392,7 +408,7 @@ var file_transport_internet_tls_config_proto_rawDesc = []byte{
 	0x4e, 0x43, 0x49, 0x50, 0x48, 0x45, 0x52, 0x4d, 0x45, 0x4e, 0x54, 0x10, 0x00, 0x12, 0x14, 0x0a,
 	0x10, 0x41, 0x55, 0x54, 0x48, 0x4f, 0x52, 0x49, 0x54, 0x59, 0x5f, 0x56, 0x45, 0x52, 0x49, 0x46,
 	0x59, 0x10, 0x01, 0x12, 0x13, 0x0a, 0x0f, 0x41, 0x55, 0x54, 0x48, 0x4f, 0x52, 0x49, 0x54, 0x59,
-	0x5f, 0x49, 0x53, 0x53, 0x55, 0x45, 0x10, 0x02, 0x22, 0x9a, 0x06, 0x0a, 0x06, 0x43, 0x6f, 0x6e,
+	0x5f, 0x49, 0x53, 0x53, 0x55, 0x45, 0x10, 0x02, 0x22, 0xe4, 0x06, 0x0a, 0x06, 0x43, 0x6f, 0x6e,
 	0x66, 0x69, 0x67, 0x12, 0x25, 0x0a, 0x0e, 0x61, 0x6c, 0x6c, 0x6f, 0x77, 0x5f, 0x69, 0x6e, 0x73,
 	0x65, 0x63, 0x75, 0x72, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x08, 0x52, 0x0d, 0x61, 0x6c, 0x6c,
 	0x6f, 0x77, 0x49, 0x6e, 0x73, 0x65, 0x63, 0x75, 0x72, 0x65, 0x12, 0x4a, 0x0a, 0x0b, 0x63, 0x65,
@@ -442,15 +458,19 @@ var file_transport_internet_tls_config_proto_rawDesc = []byte{
 	0x65, 0x72, 0x69, 0x66, 0x79, 0x5f, 0x70, 0x65, 0x65, 0x72, 0x5f, 0x63, 0x65, 0x72, 0x74, 0x5f,
 	0x69, 0x6e, 0x5f, 0x6e, 0x61, 0x6d, 0x65, 0x73, 0x18, 0x11, 0x20, 0x03, 0x28, 0x09, 0x52, 0x15,
 	0x76, 0x65, 0x72, 0x69, 0x66, 0x79, 0x50, 0x65, 0x65, 0x72, 0x43, 0x65, 0x72, 0x74, 0x49, 0x6e,
-	0x4e, 0x61, 0x6d, 0x65, 0x73, 0x42, 0x73, 0x0a, 0x1f, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61,
+	0x4e, 0x61, 0x6d, 0x65, 0x73, 0x12, 0x26, 0x0a, 0x0f, 0x65, 0x63, 0x68, 0x5f, 0x63, 0x6f, 0x6e,
-	0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65,
+	0x66, 0x69, 0x67, 0x5f, 0x6c, 0x69, 0x73, 0x74, 0x18, 0x12, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0d,
-	0x72, 0x6e, 0x65, 0x74, 0x2e, 0x74, 0x6c, 0x73, 0x50, 0x01, 0x5a, 0x30, 0x67, 0x69, 0x74, 0x68,
+	0x65, 0x63, 0x68, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x4c, 0x69, 0x73, 0x74, 0x12, 0x20, 0x0a,
-	0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79,
+	0x0c, 0x65, 0x63, 0x68, 0x5f, 0x6b, 0x65, 0x79, 0x5f, 0x73, 0x65, 0x74, 0x73, 0x18, 0x13, 0x20,
-	0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2f,
+	0x01, 0x28, 0x0c, 0x52, 0x0a, 0x65, 0x63, 0x68, 0x4b, 0x65, 0x79, 0x53, 0x65, 0x74, 0x73, 0x42,
-	0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2f, 0x74, 0x6c, 0x73, 0xaa, 0x02, 0x1b, 0x58,
+	0x73, 0x0a, 0x1f, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61, 0x6e,
-	0x72, 0x61, 0x79, 0x2e, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x49, 0x6e,
+	0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x74,
-	0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e, 0x54, 0x6c, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74,
+	0x6c, 0x73, 0x50, 0x01, 0x5a, 0x30, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d,
-	0x6f, 0x33,
+	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, 0x74, 0x6c, 0x73, 0xaa, 0x02, 0x1b, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x54, 0x72,
+	0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74,
+	0x2e, 0x54, 0x6c, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

transport/internet/tls/config.proto

@@ -76,7 +76,7 @@ message Config {
   repeated bytes pinned_peer_certificate_chain_sha256 = 13;
 
   /* @Document Some certificate public key sha256 hashes.
-     @Document After normal validation (required), if the verified cert's public key hash does not match any of these values, the connection will be aborted.
+     @Document After normal validation (required), if one of certs in verified chain matches one of these values, the connection will be eventually accepted.
      @Critical
   */
   repeated bytes pinned_peer_certificate_public_key_sha256 = 14;
@@ -91,4 +91,8 @@ message Config {
      @Critical
   */
   repeated string verify_peer_cert_in_names = 17;
+
+  string ech_config_list = 18;
+
+  bytes ech_key_sets = 19;
 }

transport/internet/tls/ech.go

@@ -0,0 +1,255 @@
+package tls
+
+import (
+	"bytes"
+	"context"
+	"crypto/tls"
+	"io"
+	"net/http"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/OmarTariq612/goech"
+	"github.com/miekg/dns"
+	"github.com/xtls/xray-core/common/errors"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/transport/internet"
+)
+
+func ApplyECH(c *Config, config *tls.Config) error {
+	var ECHConfig []byte
+	var err error
+
+	nameToQuery := c.ServerName
+	var DNSServer string
+
+	// for client
+	if len(c.EchConfigList) != 0 {
+		// direct base64 config
+		if strings.HasPrefix(c.EchConfigList, "base64") {
+			Base64ECHConfigList := c.EchConfigList[len("base64://"):]
+			ECHConfigList, err := goech.ECHConfigListFromBase64(Base64ECHConfigList)
+			if err != nil {
+				return errors.New("Failed to unmarshal ECHConfigList: ", err)
+			}
+			ECHConfig, _ = ECHConfigList.MarshalBinary()
+		} else { // query config from dns
+			parts := strings.Split(c.EchConfigList, "+")
+			if len(parts) == 2 {
+				// parse ECH DNS server in format of "example.com+https://1.1.1.1/dns-query"
+				nameToQuery = parts[0]
+				DNSServer = parts[1]
+			} else if len(parts) == 1 {
+				// normal format
+				DNSServer = parts[0]
+			} else {
+				return errors.New("Invalid ECH DNS server format: ", c.EchConfigList)
+			}
+			if nameToQuery == "" {
+				return errors.New("Using DNS for ECH Config needs serverName or use Server format example.com+https://1.1.1.1/dns-query")
+			}
+			ECHConfig, err = QueryRecord(nameToQuery, DNSServer)
+			if err != nil {
+				return err
+			}
+		}
+
+		config.EncryptedClientHelloConfigList = ECHConfig
+	}
+
+	// for server
+	if len(c.EchKeySets) != 0 {
+		var keys []tls.EncryptedClientHelloKey
+		KeySets, err := goech.UnmarshalECHKeySetList(c.EchKeySets)
+		if err != nil {
+			return errors.New("Failed to unmarshal ECHKeySetList: ", err)
+		}
+		for idx, keySet := range KeySets {
+			ECHConfig, err := keySet.ECHConfig.MarshalBinary()
+			ECHPrivateKey, err := keySet.PrivateKey.MarshalBinary()
+			if err != nil {
+				return errors.New("Failed to marshal ECHKey in index: ", idx, "with err: ", err)
+			}
+			keys = append(keys, tls.EncryptedClientHelloKey{
+				Config:     ECHConfig,
+				PrivateKey: ECHPrivateKey})
+		}
+		config.EncryptedClientHelloKeys = keys
+	}
+	
+	return nil
+}
+
+type record struct {
+	echConfig []byte
+	expire    time.Time
+}
+
+var (
+	dnsCache sync.Map
+	// global Lock? I'm not sure if this needs finer grained locks.
+	// If we do this, we will need to nest another layer of struct
+	updating sync.Mutex
+)
+
+// QueryRecord returns the ECH config for given domain.
+// If the record is not in cache or expired, it will query the DNS server and update the cache.
+func QueryRecord(domain string, server string) ([]byte, error) {
+	val, found := dnsCache.Load(domain)
+	rec, _ := val.(record)
+	if found && rec.expire.After(time.Now()) {
+		errors.LogDebug(context.Background(), "Cache hit for domain: ", domain)
+		return rec.echConfig, nil
+	}
+
+	updating.Lock()
+	defer updating.Unlock()
+	// Try to get cache again after lock, in case another goroutine has updated it
+	// This might happen when the core tring is just stared and multiple goroutines are trying to query the same domain
+	val, found = dnsCache.Load(domain)
+	rec, _ = val.(record)
+	if found && rec.expire.After(time.Now()) {
+		errors.LogDebug(context.Background(), "ECH Config cache hit for domain: ", domain, " after trying to get update lock")
+		return rec.echConfig, nil
+	}
+
+	// Query ECH config from DNS server
+	errors.LogDebug(context.Background(), "Trying to query ECH config for domain: ", domain, " with ECH server: ", server)
+	echConfig, ttl, err := dnsQuery(server, domain)
+	if err != nil {
+		return []byte{}, err
+	}
+
+	// Set minimum TTL to 600 seconds
+	if ttl < 600 {
+		ttl = 600
+	}
+
+	// Update cache
+	newRecored := record{
+		echConfig: echConfig,
+		expire:    time.Now().Add(time.Second * time.Duration(ttl)),
+	}
+	dnsCache.Store(domain, newRecored)
+	return echConfig, nil
+}
+
+// dnsQuery is the real func for sending type65 query for given domain to given DNS server.
+// return ECH config, TTL and error
+func dnsQuery(server string, domain string) ([]byte, uint32, error) {
+	if server == "xray" {
+		HTTPSRecord, err := internet.LookupHTTPS(domain)
+		if err !=nil {
+			return []byte{}, 0, errors.New("failed to lookup HTTPS record with xray internal DNS: ", err)
+		}
+		ECH := HTTPSRecord["ech"]
+		if ECH == "" {
+			return []byte{}, 0, errors.New("no ech record found")
+		}
+		Base64echConfigList, err := goech.ECHConfigListFromBase64(ECH)
+		if err != nil {
+			return []byte{}, 0, errors.New("failed to unmarshal ECHConfigList: ", err)
+		}
+		echConfigList, _ := Base64echConfigList.MarshalBinary()
+		return echConfigList, 600, nil
+	}
+	m := new(dns.Msg)
+	var dnsResolve []byte
+	m.SetQuestion(dns.Fqdn(domain), dns.TypeHTTPS)
+	// for DOH server
+	if strings.HasPrefix(server, "https://") {
+		// always 0 in DOH
+		m.Id = 0
+		msg, err := m.Pack()
+		if err != nil {
+			return []byte{}, 0, err
+		}
+		// All traffic sent by core should via xray's internet.DialSystem
+		// This involves the behavior of some Android VPN GUI clients
+		tr := &http.Transport{
+			IdleConnTimeout:   90 * 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
+				}
+				conn, err := internet.DialSystem(ctx, dest, nil)
+				if err != nil {
+					return nil, err
+				}
+				return conn, nil
+			},
+		}
+		client := &http.Client{
+			Timeout:   5 * time.Second,
+			Transport: tr,
+		}
+		req, err := http.NewRequest("POST", server, bytes.NewReader(msg))
+		if err != nil {
+			return []byte{}, 0, err
+		}
+		req.Header.Set("Content-Type", "application/dns-message")
+		resp, err := client.Do(req)
+		if err != nil {
+			return []byte{}, 0, err
+		}
+		defer resp.Body.Close()
+		respBody, err := io.ReadAll(resp.Body)
+		if err != nil {
+			return []byte{}, 0, err
+		}
+		if resp.StatusCode != http.StatusOK {
+			return []byte{}, 0, errors.New("query failed with response code:", resp.StatusCode)
+		}
+		dnsResolve = respBody
+	} else if strings.HasPrefix(server, "udp://") { // for classic udp dns server
+		udpServerAddr := server[len("udp://"):]
+		// default port 53 if not specified
+		if !strings.Contains(udpServerAddr, ":") {
+			udpServerAddr = udpServerAddr + ":53"
+		}
+		dest, err := net.ParseDestination("udp" + ":" + udpServerAddr)
+		if err != nil {
+			return nil, 0, errors.New("failed to parse udp dns server ", udpServerAddr, " for ECH: ", err)
+		}
+		dnsTimeoutCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+		defer cancel()
+		// use xray's internet.DialSystem as mentioned above
+		conn, err := internet.DialSystem(dnsTimeoutCtx, dest, nil)
+		defer conn.Close()
+		if err != nil {
+			return []byte{}, 0, err
+		}
+		msg, err := m.Pack()
+		if err != nil {
+			return []byte{}, 0, err
+		}
+		conn.Write(msg)
+		udpResponse := make([]byte, 512)
+		_, err = conn.Read(udpResponse)
+		if err != nil {
+			return []byte{}, 0, err
+		}
+		dnsResolve = udpResponse
+	}
+	respMsg := new(dns.Msg)
+	err := respMsg.Unpack(dnsResolve)
+	if err != nil {
+		return []byte{}, 0, errors.New("failed to unpack dns response for ECH: ", err)
+	}
+	if len(respMsg.Answer) > 0 {
+		for _, answer := range respMsg.Answer {
+			if https, ok := answer.(*dns.HTTPS); ok && https.Hdr.Name == dns.Fqdn(domain) {
+				for _, v := range https.Value {
+					if echConfig, ok := v.(*dns.SVCBECHConfig); ok {
+						errors.LogDebug(context.Background(), "Get ECH config:", echConfig.String(), " TTL:", respMsg.Answer[0].Header().Ttl)
+						return echConfig.ECH, answer.Header().Ttl, nil
+					}
+				}
+			}
+		}
+	}
+	return []byte{}, 0, errors.New("no ech record found")
+}

transport/internet/tls/tls.go

@@ -151,10 +151,14 @@ func init() {
 	weights := utls.DefaultWeights
 	weights.TLSVersMax_Set_VersionTLS13 = 1
 	weights.FirstKeyShare_Set_CurveP256 = 0
-	randomized := utls.HelloRandomized
+	randomized := utls.HelloRandomizedALPN
 	randomized.Seed, _ = utls.NewPRNGSeed()
 	randomized.Weights = &weights
+	randomizednoalpn := utls.HelloRandomizedNoALPN
+	randomizednoalpn.Seed, _ = utls.NewPRNGSeed()
+	randomizednoalpn.Weights = &weights
 	PresetFingerprints["randomized"] = &randomized
+	PresetFingerprints["randomizednoalpn"] = &randomizednoalpn
 }
 
 func GetFingerprint(name string) (fingerprint *utls.ClientHelloID) {
@@ -175,17 +179,18 @@ func GetFingerprint(name string) (fingerprint *utls.ClientHelloID) {
 
 var PresetFingerprints = map[string]*utls.ClientHelloID{
 	// Recommended preset options in GUI clients
-	"chrome":     &utls.HelloChrome_Auto,
+	"chrome":           &utls.HelloChrome_Auto,
-	"firefox":    &utls.HelloFirefox_Auto,
+	"firefox":          &utls.HelloFirefox_Auto,
-	"safari":     &utls.HelloSafari_Auto,
+	"safari":           &utls.HelloSafari_Auto,
-	"ios":        &utls.HelloIOS_Auto,
+	"ios":              &utls.HelloIOS_Auto,
-	"android":    &utls.HelloAndroid_11_OkHttp,
+	"android":          &utls.HelloAndroid_11_OkHttp,
-	"edge":       &utls.HelloEdge_Auto,
+	"edge":             &utls.HelloEdge_Auto,
-	"360":        &utls.Hello360_Auto,
+	"360":              &utls.Hello360_Auto,
-	"qq":         &utls.HelloQQ_Auto,
+	"qq":               &utls.HelloQQ_Auto,
-	"random":     nil,
+	"random":           nil,
-	"randomized": nil,
+	"randomized":       nil,
-	"unsafe":     nil,
+	"randomizednoalpn": nil,
+	"unsafe":           nil,
 }
 
 var ModernFingerprints = map[string]*utls.ClientHelloID{
@@ -193,12 +198,14 @@ var ModernFingerprints = map[string]*utls.ClientHelloID{
 	"hellofirefox_99":         &utls.HelloFirefox_99,
 	"hellofirefox_102":        &utls.HelloFirefox_102,
 	"hellofirefox_105":        &utls.HelloFirefox_105,
+	"hellofirefox_120":        &utls.HelloFirefox_120,
 	"hellochrome_83":          &utls.HelloChrome_83,
 	"hellochrome_87":          &utls.HelloChrome_87,
 	"hellochrome_96":          &utls.HelloChrome_96,
 	"hellochrome_100":         &utls.HelloChrome_100,
 	"hellochrome_102":         &utls.HelloChrome_102,
 	"hellochrome_106_shuffle": &utls.HelloChrome_106_Shuffle,
+	"hellochrome_120":         &utls.HelloChrome_120,
 	"helloios_13":             &utls.HelloIOS_13,
 	"helloios_14":             &utls.HelloIOS_14,
 	"helloedge_85":            &utls.HelloEdge_85,