v25.7.26

Announcement of NFTs by Project X: https://github.com/XTLS/Xray-core/discussions/3633
Project X NFT: https://opensea.io/assets/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/1

XHTTP: Beyond REALITY: https://github.com/XTLS/Xray-core/discussions/4113
REALITY NFT: https://opensea.io/assets/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/2

.github/workflows/docker.yml

@@ -38,6 +38,9 @@ jobs:
           if [[ -z "$SOURCE_TAG" ]]; then
             SOURCE_TAG="${{ github.ref_name }}"
           fi
+          if [[ -z "$SOURCE_TAG" ]]; then
+            SOURCE_TAG="${{ github.event.release.tag_name }}"
+          fi
 
           if [[ -z "$SOURCE_TAG" ]]; then
             echo "Error: Could not determine a valid tag source. Input tag and context tag (github.ref_name) are both empty."

README.md

@@ -1,5 +1,9 @@
 # Project X
 
+[![Project X NFT](https://raw2.seadn.io/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/7fa9ce900fb39b44226348db330e32/8b7fa9ce900fb39b44226348db330e32.svg)](https://opensea.io/item/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/1)
+
+### [Collect a Project X NFT to support the development of Project X!](https://opensea.io/item/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/1)
+
 [Project X](https://github.com/XTLS) originates from XTLS protocol, providing a set of network tools such as [Xray-core](https://github.com/XTLS/Xray-core) and [REALITY](https://github.com/XTLS/REALITY).
 
 [README](https://github.com/XTLS/Xray-core#readme) is open, so feel free to submit your project [here](https://github.com/XTLS/Xray-core/pulls).
@@ -7,8 +11,9 @@
 ## Donation & NFTs
 
 - **ETH/USDT/USDC: `0xDc3Fe44F0f25D13CACb1C4896CD0D321df3146Ee`**
-- **Project X NFT: [Announcement of NFTs by Project X](https://github.com/XTLS/Xray-core/discussions/3633)**
-- **REALITY NFT: [XHTTP: Beyond REALITY](https://github.com/XTLS/Xray-core/discussions/4113)**
+- **Project X NFT: https://opensea.io/item/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/1**
+- **REALITY NFT: https://opensea.io/item/ethereum/0x5ee362866001613093361eb8569d59c4141b76d1/2**
+- **Related links: https://opensea.io/collection/xtls, [Announcement of NFTs by Project X](https://github.com/XTLS/Xray-core/discussions/3633), [XHTTP: Beyond REALITY](https://github.com/XTLS/Xray-core/discussions/4113)**
 
 ## License
 
@@ -88,25 +93,28 @@
   - [SaeedDev94/Xray](https://github.com/SaeedDev94/Xray)
   - [SimpleXray](https://github.com/lhear/SimpleXray)
   - [AnyPortal](https://github.com/AnyPortal/AnyPortal)
-- iOS & macOS arm64
-  - [Happ](https://apps.apple.com/app/happ-proxy-utility/id6504287215)
+- iOS & macOS arm64 & tvOS
+  - [Happ](https://apps.apple.com/app/happ-proxy-utility/id6504287215) ([tvOS](https://apps.apple.com/us/app/happ-proxy-utility-for-tv/id6748297274))
   - [Streisand](https://apps.apple.com/app/streisand/id6450534064)
   - [OneXray](https://github.com/OneXray/OneXray)
 - macOS arm64 & x64
+  - [Happ](https://apps.apple.com/app/happ-proxy-utility/id6504287215)
   - [V2rayU](https://github.com/yanue/V2rayU)
   - [V2RayXS](https://github.com/tzmax/V2RayXS)
   - [Furious](https://github.com/LorenEteval/Furious)
   - [OneXray](https://github.com/OneXray/OneXray)
+  - [GoXRay](https://github.com/goxray/desktop)
   - [AnyPortal](https://github.com/AnyPortal/AnyPortal)
 - Linux
   - [v2rayA](https://github.com/v2rayA/v2rayA)
   - [Furious](https://github.com/LorenEteval/Furious)
   - [GorzRay](https://github.com/ketetefid/GorzRay)
+  - [GoXRay](https://github.com/goxray/desktop)
   - [AnyPortal](https://github.com/AnyPortal/AnyPortal)
 
 ## Others that support VLESS, XTLS, REALITY, XUDP, PLUX...
 
-- iOS & macOS arm64
+- iOS & macOS arm64 & tvOS
   - [Shadowrocket](https://apps.apple.com/app/shadowrocket/id932747118)
   - [Loon](https://apps.apple.com/us/app/loon/id1373567447)
 - Xray Tools

app/dns/dns.go

@@ -204,7 +204,12 @@ func (s *DNS) LookupIP(domain string, option dns.IPOption) ([]net.IP, uint32, er
 	}
 
 	// Static host lookup
-	switch addrs := s.hosts.Lookup(domain, option); {
+	switch addrs, err := s.hosts.Lookup(domain, option); {
+	case err != nil:
+		if go_errors.Is(err, dns.ErrEmptyResponse) {
+			return nil, 0, dns.ErrEmptyResponse
+		}
+		return nil, 0, errors.New("returning nil for domain ", domain).Base(err)
 	case addrs == nil: // Domain not recorded in static host
 		break
 	case len(addrs) == 0: // Domain recorded, but no valid IP returned (e.g. IPv4 address with only IPv6 enabled)

app/dns/hosts.go

@@ -2,6 +2,8 @@ package dns
 
 import (
 	"context"
+	"strconv"
+
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/strmatcher"
@@ -31,7 +33,15 @@ func NewStaticHosts(hosts []*Config_HostMapping) (*StaticHosts, error) {
 		ips := make([]net.Address, 0, len(mapping.Ip)+1)
 		switch {
 		case len(mapping.ProxiedDomain) > 0:
+			if mapping.ProxiedDomain[0] == '#' {
+				rcode, err := strconv.Atoi(mapping.ProxiedDomain[1:])
+				if err != nil {
+					return nil, err
+				}
+				ips = append(ips, dns.RCodeError(rcode))
+			} else {
 				ips = append(ips, net.DomainAddress(mapping.ProxiedDomain))
+			}
 		case len(mapping.Ip) > 0:
 			for _, ip := range mapping.Ip {
 				addr := net.IPAddress(ip)
@@ -58,38 +68,51 @@ func filterIP(ips []net.Address, option dns.IPOption) []net.Address {
 	return filtered
 }
 
-func (h *StaticHosts) lookupInternal(domain string) []net.Address {
+func (h *StaticHosts) lookupInternal(domain string) ([]net.Address, error) {
 	ips := make([]net.Address, 0)
 	found := false
 	for _, id := range h.matchers.Match(domain) {
+		for _, v := range h.ips[id] {
+			if err, ok := v.(dns.RCodeError); ok {
+				if uint16(err) == 0 {
+					return nil, dns.ErrEmptyResponse
+				}
+				return nil, err
+			}
+		}
 		ips = append(ips, h.ips[id]...)
 		found = true
 	}
 	if !found {
-		return nil
+		return nil, nil
 	}
-	return ips
+	return ips, nil
 }
 
-func (h *StaticHosts) lookup(domain string, option dns.IPOption, maxDepth int) []net.Address {
-	switch addrs := h.lookupInternal(domain); {
+func (h *StaticHosts) lookup(domain string, option dns.IPOption, maxDepth int) ([]net.Address, error) {
+	switch addrs, err := h.lookupInternal(domain); {
+	case err != nil:
+		return nil, err
 	case len(addrs) == 0: // Not recorded in static hosts, return nil
-		return addrs
+		return addrs, nil
 	case len(addrs) == 1 && addrs[0].Family().IsDomain(): // Try to unwrap domain
 		errors.LogDebug(context.Background(), "found replaced domain: ", domain, " -> ", addrs[0].Domain(), ". Try to unwrap it")
 		if maxDepth > 0 {
-			unwrapped := h.lookup(addrs[0].Domain(), option, maxDepth-1)
+			unwrapped, err := h.lookup(addrs[0].Domain(), option, maxDepth-1)
+			if err != nil {
+				return nil, err
+			}
 			if unwrapped != nil {
-				return unwrapped
+				return unwrapped, nil
 			}
 		}
-		return addrs
+		return addrs, nil
 	default: // IP record found, return a non-nil IP array
-		return filterIP(addrs, option)
+		return filterIP(addrs, option), nil
 	}
 }
 
 // Lookup returns IP addresses or proxied domain for the given domain, if exists in this StaticHosts.
-func (h *StaticHosts) Lookup(domain string, option dns.IPOption) []net.Address {
+func (h *StaticHosts) Lookup(domain string, option dns.IPOption) ([]net.Address, error) {
 	return h.lookup(domain, option, 5)
 }

app/dns/hosts_test.go

@@ -12,6 +12,11 @@ import (
 
 func TestStaticHosts(t *testing.T) {
 	pb := []*Config_HostMapping{
+		{
+			Type:          DomainMatchingType_Subdomain,
+			Domain:        "lan",
+			ProxiedDomain: "#3",
+		},
 		{
 			Type:   DomainMatchingType_Full,
 			Domain: "example.com",
@@ -54,7 +59,14 @@ func TestStaticHosts(t *testing.T) {
 	common.Must(err)
 
 	{
-		ips := hosts.Lookup("example.com", dns.IPOption{
+		_, err := hosts.Lookup("example.com.lan", dns.IPOption{})
+		if dns.RCodeFromError(err) != 3 {
+			t.Error(err)
+		}
+	}
+
+	{
+		ips, _ := hosts.Lookup("example.com", dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 		})
@@ -67,7 +79,7 @@ func TestStaticHosts(t *testing.T) {
 	}
 
 	{
-		domain := hosts.Lookup("proxy.xray.com", dns.IPOption{
+		domain, _ := hosts.Lookup("proxy.xray.com", dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: false,
 		})
@@ -80,7 +92,7 @@ func TestStaticHosts(t *testing.T) {
 	}
 
 	{
-		domain := hosts.Lookup("proxy2.xray.com", dns.IPOption{
+		domain, _ := hosts.Lookup("proxy2.xray.com", dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: false,
 		})
@@ -93,7 +105,7 @@ func TestStaticHosts(t *testing.T) {
 	}
 
 	{
-		ips := hosts.Lookup("www.example.cn", dns.IPOption{
+		ips, _ := hosts.Lookup("www.example.cn", dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 		})
@@ -106,7 +118,7 @@ func TestStaticHosts(t *testing.T) {
 	}
 
 	{
-		ips := hosts.Lookup("baidu.com", dns.IPOption{
+		ips, _ := hosts.Lookup("baidu.com", dns.IPOption{
 			IPv4Enable: false,
 			IPv6Enable: true,
 		})

app/proxyman/inbound/worker.go

@@ -161,6 +161,7 @@ type udpConn struct {
 	uplink           stats.Counter
 	downlink         stats.Counter
 	inactive         bool
+	cancel           context.CancelFunc
 }
 
 func (c *udpConn) setInactive() {
@@ -203,6 +204,9 @@ func (c *udpConn) Write(buf []byte) (int, error) {
 }
 
 func (c *udpConn) Close() error {
+	if c.cancel != nil {
+		c.cancel()
+	}
 	common.Must(c.done.Close())
 	common.Must(common.Close(c.writer))
 	return nil
@@ -259,6 +263,7 @@ func (w *udpWorker) getConnection(id connID) (*udpConn, bool) {
 	defer w.Unlock()
 
 	if conn, found := w.activeConn[id]; found && !conn.done.Done() {
+		conn.updateActivity()
 		return conn, true
 	}
 
@@ -306,7 +311,8 @@ func (w *udpWorker) callback(b *buf.Buffer, source net.Destination, originalDest
 		common.Must(w.checker.Start())
 
 		go func() {
-			ctx := w.ctx
+			ctx, cancel := context.WithCancel(w.ctx)
+			conn.cancel = cancel
 			sid := session.NewID()
 			ctx = c.ContextWithID(ctx, sid)
 

app/reverse/config.go

@@ -9,6 +9,7 @@ import (
 
 func (c *Control) FillInRandom() {
 	randomLength := dice.Roll(64)
+	randomLength++
 	c.Random = make([]byte, randomLength)
 	io.ReadFull(rand.Reader, c.Random)
 }

app/reverse/portal.go

@@ -170,7 +170,7 @@ func (p *StaticMuxPicker) PickAvailable() (*mux.ClientWorker, error) {
 		if w.draining {
 			continue
 		}
-		if w.client.Closed() {
+		if w.IsFull() {
 			continue
 		}
 		if w.client.ActiveConnections() < minConn {
@@ -211,6 +211,7 @@ type PortalWorker struct {
 	writer   buf.Writer
 	reader   buf.Reader
 	draining bool
+	counter  uint32
 }
 
 func NewPortalWorker(client *mux.ClientWorker) (*PortalWorker, error) {
@@ -244,7 +245,7 @@ func NewPortalWorker(client *mux.ClientWorker) (*PortalWorker, error) {
 }
 
 func (w *PortalWorker) heartbeat() error {
-	if w.client.Closed() {
+	if w.Closed() {
 		return errors.New("client worker stopped")
 	}
 
@@ -260,16 +261,21 @@ func (w *PortalWorker) heartbeat() error {
 		msg.State = Control_DRAIN
 
 		defer func() {
+			w.client.GetTimer().Reset(time.Second * 16)
 			common.Close(w.writer)
 			common.Interrupt(w.reader)
 			w.writer = nil
 		}()
 	}
 
+	w.counter = (w.counter + 1) % 5
+	if w.draining || w.counter == 1 {
 		b, err := proto.Marshal(msg)
 		common.Must(err)
 		mb := buf.MergeBytes(nil, b)
 		return w.writer.WriteMultiBuffer(mb)
+	}
+	return nil
 }
 
 func (w *PortalWorker) IsFull() bool {

common/mux/client.go

@@ -173,6 +173,7 @@ type ClientWorker struct {
 	sessionManager *SessionManager
 	link           transport.Link
 	done           *done.Instance
+	timer          *time.Ticker
 	strategy       ClientStrategy
 }
 
@@ -187,6 +188,7 @@ func NewClientWorker(stream transport.Link, s ClientStrategy) (*ClientWorker, er
 		sessionManager: NewSessionManager(),
 		link:           stream,
 		done:           done.New(),
+		timer:          time.NewTicker(time.Second * 16),
 		strategy:       s,
 	}
 
@@ -209,9 +211,12 @@ func (m *ClientWorker) Closed() bool {
 	return m.done.Done()
 }
 
+func (m *ClientWorker) GetTimer() *time.Ticker {
+	return m.timer
+}
+
 func (m *ClientWorker) monitor() {
-	timer := time.NewTicker(time.Second * 16)
-	defer timer.Stop()
+	defer m.timer.Stop()
 
 	for {
 		select {
@@ -220,7 +225,7 @@ func (m *ClientWorker) monitor() {
 			common.Close(m.link.Writer)
 			common.Interrupt(m.link.Reader)
 			return
-		case <-timer.C:
+		case <-m.timer.C:
 			size := m.sessionManager.Size()
 			if size == 0 && m.sessionManager.CloseIfNoSession() {
 				common.Must(m.done.Close())
@@ -276,6 +281,8 @@ func (m *ClientWorker) IsClosing() bool {
 	return false
 }
 
+// IsFull returns true if this ClientWorker is unable to accept more connections.
+// it might be because it is closing, or the number of connections has reached the limit.
 func (m *ClientWorker) IsFull() bool {
 	if m.IsClosing() || m.Closed() {
 		return true
@@ -289,12 +296,12 @@ func (m *ClientWorker) IsFull() bool {
 }
 
 func (m *ClientWorker) Dispatch(ctx context.Context, link *transport.Link) bool {
-	if m.IsFull() || m.Closed() {
+	if m.IsFull() {
 		return false
 	}
 
 	sm := m.sessionManager
-	s := sm.Allocate()
+	s := sm.Allocate(&m.strategy)
 	if s == nil {
 		return false
 	}

common/mux/server.go

@@ -201,11 +201,12 @@ func (w *ServerWorker) handleStatusNew(ctx context.Context, meta *FrameMetadata,
 			transferType: protocol.TransferTypePacket,
 			XUDP:         x,
 		}
-		go handle(ctx, x.Mux, w.link.Writer)
 		x.Status = Active
 		if !w.sessionManager.Add(x.Mux) {
 			x.Mux.Close(false)
+			return errors.New("failed to add new session")
 		}
+		go handle(ctx, x.Mux, w.link.Writer)
 		return nil
 	}
 
@@ -226,18 +227,23 @@ func (w *ServerWorker) handleStatusNew(ctx context.Context, meta *FrameMetadata,
 	if meta.Target.Network == net.Network_UDP {
 		s.transferType = protocol.TransferTypePacket
 	}
-	w.sessionManager.Add(s)
+	if !w.sessionManager.Add(s) {
+		s.Close(false)
+		return errors.New("failed to add new session")
+	}
 	go handle(ctx, s, w.link.Writer)
 	if !meta.Option.Has(OptionData) {
 		return nil
 	}
 
 	rr := s.NewReader(reader, &meta.Target)
-	if err := buf.Copy(rr, s.output); err != nil {
-		buf.Copy(rr, buf.Discard)
-		return s.Close(false)
+	err = buf.Copy(rr, s.output)
+
+	if err != nil && buf.IsWriteError(err) {
+		s.Close(false)
+		return buf.Copy(rr, buf.Discard)
 	}
-	return nil
+	return err
 }
 
 func (w *ServerWorker) handleStatusKeep(meta *FrameMetadata, reader *buf.BufferedReader) error {
@@ -304,10 +310,11 @@ func (w *ServerWorker) handleFrame(ctx context.Context, reader *buf.BufferedRead
 }
 
 func (w *ServerWorker) run(ctx context.Context) {
-	input := w.link.Reader
-	reader := &buf.BufferedReader{Reader: input}
+	reader := &buf.BufferedReader{Reader: w.link.Reader}
 
 	defer w.sessionManager.Close()
+	defer common.Close(w.link.Writer)
+	defer common.Interrupt(w.link.Reader)
 
 	for {
 		select {
@@ -318,7 +325,6 @@ func (w *ServerWorker) run(ctx context.Context) {
 			if err != nil {
 				if errors.Cause(err) != io.EOF {
 					errors.LogInfoInner(ctx, err, "unexpected EOF")
-					common.Interrupt(input)
 				}
 				return
 			}

common/mux/session.go

@@ -50,11 +50,14 @@ func (m *SessionManager) Count() int {
 	return int(m.count)
 }
 
-func (m *SessionManager) Allocate() *Session {
+func (m *SessionManager) Allocate(Strategy *ClientStrategy) *Session {
 	m.Lock()
 	defer m.Unlock()
 	
-	if m.closed {
+	MaxConcurrency := int(Strategy.MaxConcurrency)
+	MaxConnection := uint16(Strategy.MaxConnection)
+
+	if m.closed || (MaxConcurrency > 0 && len(m.sessions) >= MaxConcurrency) || (MaxConnection > 0 && m.count >= MaxConnection) {
 		return nil
 	}
 

common/mux/session_test.go

@@ -9,7 +9,7 @@ import (
 func TestSessionManagerAdd(t *testing.T) {
 	m := NewSessionManager()
 
-	s := m.Allocate()
+	s := m.Allocate(&ClientStrategy{})
 	if s.ID != 1 {
 		t.Error("id: ", s.ID)
 	}
@@ -17,7 +17,7 @@ func TestSessionManagerAdd(t *testing.T) {
 		t.Error("size: ", m.Size())
 	}
 
-	s = m.Allocate()
+	s = m.Allocate(&ClientStrategy{})
 	if s.ID != 2 {
 		t.Error("id: ", s.ID)
 	}
@@ -39,7 +39,7 @@ func TestSessionManagerAdd(t *testing.T) {
 
 func TestSessionManagerClose(t *testing.T) {
 	m := NewSessionManager()
-	s := m.Allocate()
+	s := m.Allocate(&ClientStrategy{})
 
 	if m.CloseIfNoSession() {
 		t.Error("able to close")

common/utils/typed_sync_map.go

@@ -0,0 +1,112 @@
+package utils
+
+import (
+	"sync"
+)
+
+// TypedSyncMap is a wrapper of sync.Map that provides type-safe for keys and values.
+// No need to use type assertions every time, so you can have more time to enjoy other things like GochiUsa
+// If sync.Map methods returned nil, it will return the zero value of the type V.
+type TypedSyncMap[K, V any] struct {
+	syncMap *sync.Map
+}
+
+// NewTypedSyncMap creates a new TypedSyncMap
+// K is key type, V is value type
+// It is recommended to use pointer types for V because sync.Map might return nil
+// If sync.Map methods really returned nil, it will return the zero value of the type V
+func NewTypedSyncMap[K any, V any]() *TypedSyncMap[K, V] {
+	return &TypedSyncMap[K, V]{
+		syncMap: &sync.Map{},
+	}
+}
+
+// Clear deletes all the entries, resulting in an empty Map.
+func (m *TypedSyncMap[K, V]) Clear() {
+	m.syncMap.Clear()
+}
+
+// CompareAndDelete deletes the entry for key if its value is equal to old.
+// The old value must be of a comparable type.
+//
+// If there is no current value for key in the map, CompareAndDelete
+// returns false (even if the old value is the nil interface value).
+func (m *TypedSyncMap[K, V]) CompareAndDelete(key K, old V) (deleted bool) {
+	return m.syncMap.CompareAndDelete(key, old)
+}
+
+// CompareAndSwap swaps the old and new values for key
+// if the value stored in the map is equal to old.
+// The old value must be of a comparable type.
+func (m *TypedSyncMap[K, V]) CompareAndSwap(key K, old V, new V) (swapped bool) {
+	return m.syncMap.CompareAndSwap(key, old, new)
+}
+
+// Delete deletes the value for a key.
+func (m *TypedSyncMap[K, V]) Delete(key K) {
+	m.syncMap.Delete(key)
+}
+
+// Load returns the value stored in the map for a key, or nil if no
+// value is present.
+// The ok result indicates whether value was found in the map.
+func (m *TypedSyncMap[K, V]) Load(key K) (value V, ok bool) {
+	anyValue, ok := m.syncMap.Load(key)
+	// anyValue might be nil
+	if anyValue != nil {
+		value = anyValue.(V)
+	}
+	return value, ok
+}
+
+// LoadAndDelete deletes the value for a key, returning the previous value if any.
+// The loaded result reports whether the key was present.
+func (m *TypedSyncMap[K, V]) LoadAndDelete(key K) (value V, loaded bool) {
+	anyValue, loaded := m.syncMap.LoadAndDelete(key)
+	if anyValue != nil {
+		value = anyValue.(V)
+	}
+	return value, loaded
+}
+
+// LoadOrStore returns the existing value for the key if present.
+// Otherwise, it stores and returns the given value.
+// The loaded result is true if the value was loaded, false if stored.
+func (m *TypedSyncMap[K, V]) LoadOrStore(key K, value V) (actual V, loaded bool) {
+	anyActual, loaded := m.syncMap.LoadOrStore(key, value)
+	if anyActual != nil {
+		actual = anyActual.(V)
+	}
+	return actual, loaded
+}
+
+// Range calls f sequentially for each key and value present in the map.
+// If f returns false, range stops the iteration.
+//
+// Range does not necessarily correspond to any consistent snapshot of the Map's
+// contents: no key will be visited more than once, but if the value for any key
+// is stored or deleted concurrently (including by f), Range may reflect any
+// mapping for that key from any point during the Range call. Range does not
+// block other methods on the receiver; even f itself may call any method on m.
+//
+// Range may be O(N) with the number of elements in the map even if f returns
+// false after a constant number of calls.
+func (m *TypedSyncMap[K, V]) Range(f func(key K, value V) bool) {
+	m.syncMap.Range(func(key, value any) bool {
+		return f(key.(K), value.(V))
+	})
+}
+
+// Store sets the value for a key.
+func (m *TypedSyncMap[K, V]) Store(key K, value V) {
+	m.syncMap.Store(key, value)
+}
+
+// Swap swaps the value for a key and returns the previous value if any. The loaded result reports whether the key was present.
+func (m *TypedSyncMap[K, V]) Swap(key K, value V) (previous V, loaded bool) {
+	anyPrevious, loaded := m.syncMap.Swap(key, value)
+	if anyPrevious != nil {
+		previous = anyPrevious.(V)
+	}
+	return previous, loaded
+}

core/core.go

@@ -18,8 +18,8 @@ import (
 
 var (
 	Version_x byte = 25
-	Version_y byte = 6
-	Version_z byte = 8
+	Version_y byte = 7
+	Version_z byte = 26
 )
 
 var (

features/dns/client.go

@@ -42,6 +42,24 @@ func (e RCodeError) Error() string {
 	return serial.Concat("rcode: ", uint16(e))
 }
 
+func (RCodeError) IP() net.IP {
+	panic("Calling IP() on a RCodeError.")
+}
+
+func (RCodeError) Domain() string {
+	panic("Calling Domain() on a RCodeError.")
+}
+
+func (RCodeError) Family() net.AddressFamily {
+	panic("Calling Family() on a RCodeError.")
+}
+
+func (e RCodeError) String() string {
+	return e.Error()
+}
+
+var _ net.Address = (*RCodeError)(nil)
+
 func RCodeFromError(err error) uint16 {
 	if err == nil {
 		return 0

go.mod

@@ -3,7 +3,6 @@ module github.com/xtls/xray-core
 go 1.24
 
 require (
-	github.com/OmarTariq612/goech v0.0.0-20240405204721-8e2e1dafd3a0
 	github.com/cloudflare/circl v1.6.1
 	github.com/ghodss/yaml v1.0.1-0.20220118164431-d8423dcdf344
 	github.com/golang/mock v1.7.0-rc.1
@@ -13,21 +12,21 @@ require (
 	github.com/pelletier/go-toml v1.9.5
 	github.com/pires/go-proxyproto v0.8.1
 	github.com/quic-go/quic-go v0.54.0
-	github.com/refraction-networking/utls v1.7.3
+	github.com/refraction-networking/utls v1.8.0
 	github.com/sagernet/sing v0.5.1
 	github.com/sagernet/sing-shadowsocks v0.2.7
 	github.com/seiflotfy/cuckoofilter v0.0.0-20240715131351-a2f2c23f1771
 	github.com/stretchr/testify v1.10.0
 	github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e
 	github.com/vishvananda/netlink v1.3.1
-	github.com/xtls/reality v0.0.0-20250715055725-05a351a64521
+	github.com/xtls/reality v0.0.0-20250725142056-5b52a03d4fb7
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba
 	golang.org/x/crypto v0.40.0
 	golang.org/x/net v0.42.0
 	golang.org/x/sync v0.16.0
 	golang.org/x/sys v0.34.0
 	golang.zx2c4.com/wireguard v0.0.0-20231211153847-12269c276173
-	google.golang.org/grpc v1.73.0
+	google.golang.org/grpc v1.74.2
 	google.golang.org/protobuf v1.36.6
 	gvisor.dev/gvisor v0.0.0-20250428193742-2d800c3129d5
 	h12.io/socks v1.0.3
@@ -35,13 +34,14 @@ require (
 )
 
 require (
-	github.com/andybalholm/brotli v1.1.0 // indirect
+	github.com/andybalholm/brotli v1.0.6 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/dgryski/go-metro v0.0.0-20211217172704-adc40b04c140 // indirect
+	github.com/dgryski/go-metro v0.0.0-20200812162917-85c65e2d0165 // indirect
 	github.com/google/btree v1.1.2 // indirect
 	github.com/juju/ratelimit v1.0.2 // indirect
-	github.com/klauspost/compress v1.17.8 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
+	github.com/klauspost/compress v1.17.4 // indirect
+	github.com/klauspost/cpuid/v2 v2.0.12 // indirect
+	github.com/kr/pretty v0.3.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/quic-go/qpack v0.5.1 // indirect
 	github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3 // indirect
@@ -52,7 +52,7 @@ require (
 	golang.org/x/time v0.7.0 // indirect
 	golang.org/x/tools v0.34.0 // indirect
 	golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20250324211829-b45e905df463 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250528174236-200df99c418a // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,19 +1,17 @@
-github.com/OmarTariq612/goech v0.0.0-20240405204721-8e2e1dafd3a0 h1:Wo41lDOevRJSGpevP+8Pk5bANX7fJacO2w04aqLiC5I=
-github.com/OmarTariq612/goech v0.0.0-20240405204721-8e2e1dafd3a0/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/andybalholm/brotli v1.0.6 h1:Yf9fFpf49Zrxb9NlQaluyE92/+X7UVHlhMNJN2sxfOI=
+github.com/andybalholm/brotli v1.0.6/go.mod h1:fO7iG3H7G2nSZ7m0zPUDn85XEX2GTukHGRSepvi9Eig=
 github.com/cloudflare/circl v1.6.1 h1:zqIqSPIndyBh1bjLVVDHMPpVKqp8Su/V+6MeDzzQBQ0=
 github.com/cloudflare/circl v1.6.1/go.mod h1:uddAzsPgqdMAYatqJ0lsjX1oECcQLIlRpzZh3pJrofs=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dgryski/go-metro v0.0.0-20200812162917-85c65e2d0165 h1:BS21ZUJ/B5X2UVUbczfmdWH7GapPWAhxcMsDnjJTU1E=
 github.com/dgryski/go-metro v0.0.0-20200812162917-85c65e2d0165/go.mod h1:c9O8+fpSOX1DM8cPNSkX/qsBWdkD4yd2dpciOWQjpBw=
-github.com/dgryski/go-metro v0.0.0-20211217172704-adc40b04c140 h1:y7y0Oa6UawqTFPCDw9JG6pdKt4F9pAhHv0B7FMGaGD0=
-github.com/dgryski/go-metro v0.0.0-20211217172704-adc40b04c140/go.mod h1:c9O8+fpSOX1DM8cPNSkX/qsBWdkD4yd2dpciOWQjpBw=
 github.com/ghodss/yaml v1.0.1-0.20220118164431-d8423dcdf344 h1:Arcl6UOIS/kgO2nW3A65HN+7CMjSDP/gofXL4CZt1V4=
 github.com/ghodss/yaml v1.0.1-0.20220118164431-d8423dcdf344/go.mod h1:GIjDIg/heH5DOkXY3YJ/wNhfHsQHoXGjl8G8amsYQ1I=
-github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
-github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
+github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/golang/mock v1.7.0-rc.1 h1:YojYx61/OLFsiv6Rw1Z96LpldJIy31o+UHmwAUMJ6/U=
@@ -32,10 +30,14 @@ github.com/h12w/go-socks5 v0.0.0-20200522160539-76189e178364 h1:5XxdakFhqd9dnXoA
 github.com/h12w/go-socks5 v0.0.0-20200522160539-76189e178364/go.mod h1:eDJQioIyy4Yn3MVivT7rv/39gAJTrA7lgmYr8EW950c=
 github.com/juju/ratelimit v1.0.2 h1:sRxmtRiajbvrcLQT7S+JbqU0ntsb9W2yhSdNN8tWfaI=
 github.com/juju/ratelimit v1.0.2/go.mod h1:qapgC/Gy+xNh9UxzV13HGGl/6UXNN+ct+vwSgWNm/qk=
-github.com/klauspost/compress v1.17.8 h1:YcnTYrq7MikUT7k0Yb5eceMmALQPYBW/Xltxn0NAMnU=
-github.com/klauspost/compress v1.17.8/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
-github.com/klauspost/cpuid/v2 v2.2.7 h1:ZWSB3igEs+d0qvnxR/ZBzXVmxkgt8DdzP6m9pfuVLDM=
-github.com/klauspost/cpuid/v2 v2.2.7/go.mod h1:Lcz8mBdAVJIBVzewtcLocK12l3Y+JytZYpaMropDUws=
+github.com/klauspost/compress v1.17.4 h1:Ej5ixsIri7BrIjBkRZLTo6ghwrEtHFk7ijlczPW4fZ4=
+github.com/klauspost/compress v1.17.4/go.mod h1:/dCuZOvVtNoHsyb+cuJD3itjs3NbnF6KH9zAO4BDxPM=
+github.com/klauspost/cpuid/v2 v2.0.12 h1:p9dKCg8i4gmOxtv35DvrYoWqYzQrvEVdjQ762Y0OqZE=
+github.com/klauspost/cpuid/v2 v2.0.12/go.mod h1:g2LTdtYhdyuGPqyWyv7qRAmj1WBqxuObKfj5c0PQa7c=
+github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/miekg/dns v1.1.67 h1:kg0EHj0G4bfT5/oOys6HhZw4vmMlnoZ+gDu8tJ/AlI0=
 github.com/miekg/dns v1.1.67/go.mod h1:fujopn7TB3Pu3JM69XaawiU0wqjpL9/8xGop5UrTPps=
 github.com/pelletier/go-toml v1.9.5 h1:4yBQzkHv+7BHq2PQUZF3Mx0IYxG7LsP222s7Agd3ve8=
@@ -44,16 +46,19 @@ github.com/phayes/freeport v0.0.0-20180830031419-95f893ade6f2 h1:JhzVVoYvbOACxoU
 github.com/phayes/freeport v0.0.0-20180830031419-95f893ade6f2/go.mod h1:iIss55rKnNBTvrwdmkUpLnDpZoAHvWaiq5+iMmen4AE=
 github.com/pires/go-proxyproto v0.8.1 h1:9KEixbdJfhrbtjpz/ZwCdWDD2Xem0NZ38qMYaASJgp0=
 github.com/pires/go-proxyproto v0.8.1/go.mod h1:ZKAAyp3cgy5Y5Mo4n9AlScrkCZwUy0g3Jf+slqQVcuU=
+github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 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 v0.54.0 h1:6s1YB9QotYI6Ospeiguknbp2Znb/jZYjZLRXn9kMQBg=
 github.com/quic-go/quic-go v0.54.0/go.mod h1:e68ZEaCdyviluZmy44P6Iey98v/Wfz6HCjQEm+l8zTY=
-github.com/refraction-networking/utls v1.7.3 h1:L0WRhHY7Oq1T0zkdzVZMR6zWZv+sXbHB9zcuvsAEqCo=
-github.com/refraction-networking/utls v1.7.3/go.mod h1:TUhh27RHMGtQvjQq+RyO11P6ZNQNBb3N0v7wsEjKAIQ=
+github.com/refraction-networking/utls v1.8.0 h1:L38krhiTAyj9EeiQQa2sg+hYb4qwLCqdMcpZrRfbONE=
+github.com/refraction-networking/utls v1.8.0/go.mod h1:jkSOEkLqn+S/jtpEHPOsVv/4V4EVnelwbMQl4vCWXAM=
 github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3 h1:f/FNXud6gA3MNr8meMVVGxhp+QBTqY91tM8HjEuMjGg=
 github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3/go.mod h1:HgjTstvQsPGkxUsCd2KWxErBblirPizecHcpD3ffK+s=
+github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
+github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 github.com/sagernet/sing v0.5.1 h1:mhL/MZVq0TjuvHcpYcFtmSD1BFOxZ/+8ofbNZcg1k1Y=
 github.com/sagernet/sing v0.5.1/go.mod h1:ARkL0gM13/Iv5VCZmci/NuoOlePoIsW0m7BWfln/Hak=
 github.com/sagernet/sing-shadowsocks v0.2.7 h1:zaopR1tbHEw5Nk6FAkM05wCslV6ahVegEZaKMv9ipx8=
@@ -70,21 +75,21 @@ github.com/vishvananda/netlink v1.3.1 h1:3AEMt62VKqz90r0tmNhog0r/PpWKmrEShJU0wJW
 github.com/vishvananda/netlink v1.3.1/go.mod h1:ARtKouGSTGchR8aMwmkzC0qiNPrrWO5JS/XMVl45+b4=
 github.com/vishvananda/netns v0.0.5 h1:DfiHV+j8bA32MFM7bfEunvT8IAqQ/NzSJHtcmW5zdEY=
 github.com/vishvananda/netns v0.0.5/go.mod h1:SpkAiCQRtJ6TvvxPnOSyH3BMl6unz3xZlaprSwhNNJM=
-github.com/xtls/reality v0.0.0-20250715055725-05a351a64521 h1:hQQSzX6Y40nY1XT1TKAEpKwUHUUy3UvYKQIclLjYx9U=
-github.com/xtls/reality v0.0.0-20250715055725-05a351a64521/go.mod h1:yD47RN65bDLZgyHWMfFDiqlzrq4usDMt/Xzsk6tMbhw=
+github.com/xtls/reality v0.0.0-20250725142056-5b52a03d4fb7 h1:Ript0vN+nSO33+Vj4n0mgNY5M+oOxFQJdrJ1VnwTBO0=
+github.com/xtls/reality v0.0.0-20250725142056-5b52a03d4fb7/go.mod h1:XxvnCCgBee4WWE0bc4E+a7wbk8gkJ/rS0vNVNtC5qp0=
 github.com/yuin/goldmark v1.4.1/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 go.opentelemetry.io/auto/sdk v1.1.0 h1:cH53jehLUN6UFLY71z+NDOiNJqDdPRaXzTel0sJySYA=
 go.opentelemetry.io/auto/sdk v1.1.0/go.mod h1:3wSPjt5PWp2RhlCcmmOial7AvC4DQqZb7a7wCow3W8A=
-go.opentelemetry.io/otel v1.35.0 h1:xKWKPxrxB6OtMCbmMY021CqC45J+3Onta9MqjhnusiQ=
-go.opentelemetry.io/otel v1.35.0/go.mod h1:UEqy8Zp11hpkUrL73gSlELM0DupHoiq72dR+Zqel/+Y=
-go.opentelemetry.io/otel/metric v1.35.0 h1:0znxYu2SNyuMSQT4Y9WDWej0VpcsxkuklLa4/siN90M=
-go.opentelemetry.io/otel/metric v1.35.0/go.mod h1:nKVFgxBZ2fReX6IlyW28MgZojkoAkJGaE8CpgeAU3oE=
-go.opentelemetry.io/otel/sdk v1.35.0 h1:iPctf8iprVySXSKJffSS79eOjl9pvxV9ZqOWT0QejKY=
-go.opentelemetry.io/otel/sdk v1.35.0/go.mod h1:+ga1bZliga3DxJ3CQGg3updiaAJoNECOgJREo9KHGQg=
-go.opentelemetry.io/otel/sdk/metric v1.35.0 h1:1RriWBmCKgkeHEhM7a2uMjMUfP7MsOF5JpUCaEqEI9o=
-go.opentelemetry.io/otel/sdk/metric v1.35.0/go.mod h1:is6XYCUMpcKi+ZsOvfluY5YstFnhW0BidkR+gL+qN+w=
-go.opentelemetry.io/otel/trace v1.35.0 h1:dPpEfJu1sDIqruz7BHFG3c7528f6ddfSWfFDVt/xgMs=
-go.opentelemetry.io/otel/trace v1.35.0/go.mod h1:WUk7DtFp1Aw2MkvqGdwiXYDZZNvA/1J8o6xRXLrIkyc=
+go.opentelemetry.io/otel v1.36.0 h1:UumtzIklRBY6cI/lllNZlALOF5nNIzJVb16APdvgTXg=
+go.opentelemetry.io/otel v1.36.0/go.mod h1:/TcFMXYjyRNh8khOAO9ybYkqaDBb/70aVwkNML4pP8E=
+go.opentelemetry.io/otel/metric v1.36.0 h1:MoWPKVhQvJ+eeXWHFBOPoBOi20jh6Iq2CcCREuTYufE=
+go.opentelemetry.io/otel/metric v1.36.0/go.mod h1:zC7Ks+yeyJt4xig9DEw9kuUFe5C3zLbVjV2PzT6qzbs=
+go.opentelemetry.io/otel/sdk v1.36.0 h1:b6SYIuLRs88ztox4EyrvRti80uXIFy+Sqzoh9kFULbs=
+go.opentelemetry.io/otel/sdk v1.36.0/go.mod h1:+lC+mTgD+MUWfjJubi2vvXWcVxyr9rmlshZni72pXeY=
+go.opentelemetry.io/otel/sdk/metric v1.36.0 h1:r0ntwwGosWGaa0CrSt8cuNuTcccMXERFwHX4dThiPis=
+go.opentelemetry.io/otel/sdk/metric v1.36.0/go.mod h1:qTNOhFDfKRwX0yXOqJYegL5WRaW376QbB7P4Pb0qva4=
+go.opentelemetry.io/otel/trace v1.36.0 h1:ahxWNuqZjpdiFAyrIoQ4GIiAIhxAunQR6MUoKrsNd4w=
+go.opentelemetry.io/otel/trace v1.36.0/go.mod h1:gQ+OnDZzrybY4k4seLzPAWNwVBBVlF2szhehOBB/tGA=
 go.uber.org/mock v0.5.0 h1:KAMbZvZPyBPWgD14IrIQ38QCyjwpvVVV6K/bHl1IwQU=
 go.uber.org/mock v0.5.0/go.mod h1:ge71pBPLYDk7QIi1LupWxdAykm7KIEFchiOqd6z7qMM=
 go4.org/netipx v0.0.0-20231129151722-fdeea329fbba h1:0b9z3AuHCjxk0x/opv64kcgZLBseWJUpBw5I82+2U4M=
@@ -111,7 +116,6 @@ golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20211019181941-9d821ace8654/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.34.0 h1:H5Y5sJ2L2JRdyv7ROF1he/lPdvFsd0mJHFw2ThKHxLA=
 golang.org/x/sys v0.34.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
@@ -135,14 +139,15 @@ golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 h1:B82qJJgjvYKsXS9jeu
 golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2/go.mod h1:deeaetjYA+DHMHg+sMSMI58GrEteJUUzzw7en6TJQcI=
 golang.zx2c4.com/wireguard v0.0.0-20231211153847-12269c276173 h1:/jFs0duh4rdb8uIfPMv78iAJGcPKDeqAFnaLBropIC4=
 golang.zx2c4.com/wireguard v0.0.0-20231211153847-12269c276173/go.mod h1:tkCQ4FQXmpAgYVh++1cq16/dH4QJtmvpRv19DWGAHSA=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20250324211829-b45e905df463 h1:e0AIkUUhxyBKh6ssZNrAMeqhA7RKUj42346d1y02i2g=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20250324211829-b45e905df463/go.mod h1:qQ0YXyHHx3XkvlzUtpXDkS29lDSafHMZBAZDc03LQ3A=
-google.golang.org/grpc v1.73.0 h1:VIWSmpI2MegBtTuFt5/JWy2oXxtjJ/e89Z70ImfD2ok=
-google.golang.org/grpc v1.73.0/go.mod h1:50sbHOUqWoCQGI8V2HQLJM0B+LMlIUjNSZmow7EVBQc=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20250528174236-200df99c418a h1:v2PbRU4K3llS09c7zodFpNePeamkAwG3mPrAery9VeE=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20250528174236-200df99c418a/go.mod h1:qQ0YXyHHx3XkvlzUtpXDkS29lDSafHMZBAZDc03LQ3A=
+google.golang.org/grpc v1.74.2 h1:WoosgB65DlWVC9FqI82dGsZhWFNBSLjQ84bjROOpMu4=
+google.golang.org/grpc v1.74.2/go.mod h1:CtQ+BGjaAIXHs/5YS3i473GqwBBa1zGQNevxdeBEXrM=
 google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
 google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=

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"`
+	ECHServerKeys                        string           `json:"echServerKeys"`
 }
 
 // Build implements Buildable.
@@ -483,6 +485,16 @@ func (c *TLSConfig) Build() (proto.Message, error) {
 	}
 	config.VerifyPeerCertInNames = c.VerifyPeerCertInNames
 
+	config.EchConfigList = c.ECHConfigList
+
+	if c.ECHServerKeys != "" {
+		EchPrivateKey, err := base64.StdEncoding.DecodeString(c.ECHServerKeys)
+		if err != nil {
+			return nil, errors.New("invalid ECH Config", c.ECHServerKeys)
+		}
+		config.EchServerKeys = EchPrivateKey
+	}
+
 	return config, nil
 }
 
@@ -505,6 +517,7 @@ type REALITYConfig struct {
 	MaxClientVer string          `json:"maxClientVer"`
 	MaxTimeDiff  uint64          `json:"maxTimeDiff"`
 	ShortIds     []string        `json:"shortIds"`
+	Mldsa65Seed  string          `json:"mldsa65Seed"`
 
 	LimitFallbackUpload   LimitFallback `json:"limitFallbackUpload"`
 	LimitFallbackDownload LimitFallback `json:"limitFallbackDownload"`
@@ -514,6 +527,7 @@ type REALITYConfig struct {
 	Password      string `json:"password"`
 	PublicKey     string `json:"publicKey"`
 	ShortId       string `json:"shortId"`
+	Mldsa65Verify string `json:"mldsa65Verify"`
 	SpiderX       string `json:"spiderX"`
 }
 
@@ -610,6 +624,15 @@ func (c *REALITYConfig) Build() (proto.Message, error) {
 		config.ServerNames = c.ServerNames
 		config.MaxTimeDiff = c.MaxTimeDiff
 
+		if c.Mldsa65Seed != "" {
+			if c.Mldsa65Seed == c.PrivateKey {
+				return nil, errors.New(`"mldsa65Seed" and "privateKey" can not be the same value: `, c.Mldsa65Seed)
+			}
+			if config.Mldsa65Seed, err = base64.RawURLEncoding.DecodeString(c.Mldsa65Seed); err != nil || len(config.Mldsa65Seed) != 32 {
+				return nil, errors.New(`invalid "mldsa65Seed": `, c.Mldsa65Seed)
+			}
+		}
+
 		config.LimitFallbackUpload = new(reality.LimitFallback)
 		config.LimitFallbackUpload.AfterBytes = c.LimitFallbackUpload.AfterBytes
 		config.LimitFallbackUpload.BytesPerSec = c.LimitFallbackUpload.BytesPerSec
@@ -645,6 +668,11 @@ func (c *REALITYConfig) Build() (proto.Message, error) {
 		if _, err = hex.Decode(config.ShortId, []byte(c.ShortId)); err != nil {
 			return nil, errors.New(`invalid "shortId": `, c.ShortId)
 		}
+		if c.Mldsa65Verify != "" {
+			if config.Mldsa65Verify, err = base64.RawURLEncoding.DecodeString(c.Mldsa65Verify); err != nil || len(config.Mldsa65Verify) != 1952 {
+				return nil, errors.New(`invalid "mldsa65Verify": `, c.Mldsa65Verify)
+			}
+		}
 		if c.SpiderX == "" {
 			c.SpiderX = "/"
 		}

main/commands/all/api/api.go

@@ -23,6 +23,8 @@ var CmdAPI = &base.Command{
 		cmdRemoveOutbounds,
 		cmdListInbounds,
 		cmdListOutbounds,
+		cmdAddInboundUsers,
+		cmdRemoveInboundUsers,
 		cmdInboundUser,
 		cmdInboundUserCount,
 		cmdAddRules,

main/commands/all/api/inbound_user_add.go

@@ -0,0 +1,144 @@
+package api
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/xtls/xray-core/common/protocol"
+
+	handlerService "github.com/xtls/xray-core/app/proxyman/command"
+	cserial "github.com/xtls/xray-core/common/serial"
+
+	"github.com/xtls/xray-core/core"
+	"github.com/xtls/xray-core/infra/conf"
+	"github.com/xtls/xray-core/infra/conf/serial"
+	"github.com/xtls/xray-core/proxy/shadowsocks"
+	"github.com/xtls/xray-core/proxy/shadowsocks_2022"
+	"github.com/xtls/xray-core/proxy/trojan"
+	vlessin "github.com/xtls/xray-core/proxy/vless/inbound"
+	vmessin "github.com/xtls/xray-core/proxy/vmess/inbound"
+
+	"github.com/xtls/xray-core/main/commands/base"
+)
+
+var cmdAddInboundUsers = &base.Command{
+	CustomFlags: true,
+	UsageLine:   "{{.Exec}} api adu [--server=127.0.0.1:8080] <c1.json> [c2.json]...",
+	Short:       "Add users to inbounds",
+	Long: `
+Add users to inbounds.
+Arguments:
+	-s, -server
+		The API server address. Default 127.0.0.1:8080
+	-t, -timeout
+		Timeout seconds to call API. Default 3
+Example:
+    {{.Exec}} {{.LongName}} --server=127.0.0.1:8080  c1.json c2.json
+`,
+	Run: executeAddInboundUsers,
+}
+
+func executeAddInboundUsers(cmd *base.Command, args []string) {
+	setSharedFlags(cmd)
+	cmd.Flag.Parse(args)
+	unnamedArgs := cmd.Flag.Args()
+	inbs := extractInboundsConfig(unnamedArgs)
+
+	conn, ctx, close := dialAPIServer()
+	defer close()
+	client := handlerService.NewHandlerServiceClient(conn)
+
+	success := 0
+	for _, inb := range inbs {
+		success += executeInboundUserAction(ctx, client, inb, addInboundUserAction)
+	}
+	fmt.Println("Added", success, "user(s) in total.")
+}
+
+func addInboundUserAction(ctx context.Context, client handlerService.HandlerServiceClient, tag string, user *protocol.User) error {
+	fmt.Println("add user:", user.Email)
+	_, err := client.AlterInbound(ctx, &handlerService.AlterInboundRequest{
+		Tag: tag,
+		Operation: cserial.ToTypedMessage(
+			&handlerService.AddUserOperation{
+				User: user,
+			}),
+	})
+	return err
+}
+
+func extractInboundUsers(inb *core.InboundHandlerConfig) []*protocol.User {
+	if inb == nil {
+		return nil
+	}
+	inst, err := inb.ProxySettings.GetInstance()
+	if err != nil || inst == nil {
+		fmt.Println("failed to get inbound instance:", err)
+		return nil
+	}
+	switch ty := inst.(type) {
+	case *vmessin.Config:
+		return ty.User
+	case *vlessin.Config:
+		return ty.Clients
+	case *trojan.ServerConfig:
+		return ty.Users
+	case *shadowsocks.ServerConfig:
+		return ty.Users
+	case *shadowsocks_2022.MultiUserServerConfig:
+		return ty.Users
+	default:
+		fmt.Println("unsupported inbound type")
+	}
+	return nil
+}
+
+func extractInboundsConfig(unnamedArgs []string) []conf.InboundDetourConfig {
+	ins := make([]conf.InboundDetourConfig, 0)
+	for _, arg := range unnamedArgs {
+		r, err := loadArg(arg)
+		if err != nil {
+			base.Fatalf("failed to load %s: %s", arg, err)
+		}
+		conf, err := serial.DecodeJSONConfig(r)
+		if err != nil {
+			base.Fatalf("failed to decode %s: %s", arg, err)
+		}
+		ins = append(ins, conf.InboundConfigs...)
+	}
+	return ins
+}
+
+func executeInboundUserAction(ctx context.Context, client handlerService.HandlerServiceClient, inb conf.InboundDetourConfig, action func(ctx context.Context, client handlerService.HandlerServiceClient, tag string, user *protocol.User) error) int {
+	success := 0
+
+	tag := inb.Tag
+	if len(tag) < 1 {
+		return success
+	}
+
+	fmt.Println("processing inbound:", tag)
+	built, err := inb.Build()
+	if err != nil {
+		fmt.Println("failed to build config:", err)
+		return success
+	}
+
+	users := extractInboundUsers(built)
+	if users == nil {
+		return success
+	}
+
+	for _, user := range users {
+		if len(user.Email) < 1 {
+			continue
+		}
+		if err := action(ctx, client, inb.Tag, user); err == nil {
+			fmt.Println("result: ok")
+			success += 1
+		} else {
+			fmt.Println(err)
+		}
+	}
+	return success
+}

main/commands/all/api/inbound_user_remove.go

@@ -0,0 +1,62 @@
+package api
+
+import (
+	"fmt"
+
+	handlerService "github.com/xtls/xray-core/app/proxyman/command"
+	cserial "github.com/xtls/xray-core/common/serial"
+
+	"github.com/xtls/xray-core/main/commands/base"
+)
+
+var cmdRemoveInboundUsers = &base.Command{
+	CustomFlags: true,
+	UsageLine:   "{{.Exec}} api rmu [--server=127.0.0.1:8080] -tag=tag <email1> [email2]...",
+	Short:       "Remove users from inbounds",
+	Long: `
+Remove users from inbounds.
+Arguments:
+	-s, -server
+		The API server address. Default 127.0.0.1:8080
+	-t, -timeout
+		Timeout seconds to call API. Default 3
+	-tag
+		Inbound tag
+Example:
+    {{.Exec}} {{.LongName}} --server=127.0.0.1:8080 -tag="vless-in" "xray@love.com" ...
+`,
+	Run: executeRemoveUsers,
+}
+
+func executeRemoveUsers(cmd *base.Command, args []string) {
+	setSharedFlags(cmd)
+	var tag string
+	cmd.Flag.StringVar(&tag, "tag", "", "")
+	cmd.Flag.Parse(args)
+	emails := cmd.Flag.Args()
+	if len(tag) < 1 {
+		base.Fatalf("inbound tag not specified")
+	}
+
+	conn, ctx, close := dialAPIServer()
+	defer close()
+	client := handlerService.NewHandlerServiceClient(conn)
+
+	success := 0
+	for _, email := range emails {
+		fmt.Println("remove user:", email)
+		_, err := client.AlterInbound(ctx, &handlerService.AlterInboundRequest{
+			Tag: tag,
+			Operation: cserial.ToTypedMessage(
+				&handlerService.RemoveUserOperation{
+					Email: email,
+				}),
+		})
+		if err == nil {
+			success += 1
+		} else {
+			fmt.Println(err)
+		}
+	}
+	fmt.Println("Removed", success, "user(s) in total.")
+}

main/commands/all/commands.go

@@ -16,5 +16,6 @@ func init() {
 		cmdUUID,
 		cmdX25519,
 		cmdWG,
+		cmdMLDSA65,
 	)
 }

main/commands/all/mldsa65.go

@@ -0,0 +1,42 @@
+package all
+
+import (
+	"crypto/rand"
+	"encoding/base64"
+	"fmt"
+
+	"github.com/cloudflare/circl/sign/mldsa/mldsa65"
+	"github.com/xtls/xray-core/main/commands/base"
+)
+
+var cmdMLDSA65 = &base.Command{
+	UsageLine: `{{.Exec}} mldsa65 [-i "seed (base64.RawURLEncoding)"]`,
+	Short:     `Generate key pair for ML-DSA-65 post-quantum signature`,
+	Long: `
+Generate key pair for ML-DSA-65 post-quantum signature.
+
+Random: {{.Exec}} mldsa65
+
+From seed: {{.Exec}} mldsa65 -i "seed (base64.RawURLEncoding)"
+`,
+}
+
+func init() {
+	cmdMLDSA65.Run = executeMLDSA65 // break init loop
+}
+
+var input_seed = cmdMLDSA65.Flag.String("i", "", "")
+
+func executeMLDSA65(cmd *base.Command, args []string) {
+	var seed [32]byte
+	if len(*input_seed) > 0 {
+		s, _ := base64.RawURLEncoding.DecodeString(*input_seed)
+		seed = [32]byte(s)
+	} else {
+		rand.Read(seed[:])
+	}
+	pub, _ := mldsa65.NewKeyFromSeed(&seed)
+	fmt.Printf("Seed: %v\nVerify: %v",
+		base64.RawURLEncoding.EncodeToString(seed[:]),
+		base64.RawURLEncoding.EncodeToString(pub.Bytes()))
+}

main/commands/all/tls/ech.go

@@ -1,25 +1,26 @@
 package tls
 
 import (
-	"encoding/json"
+	"encoding/base64"
 	"encoding/pem"
 	"os"
-	"strings"
 
-	"github.com/OmarTariq612/goech"
-	"github.com/cloudflare/circl/hpke"
+	"github.com/xtls/reality/hpke"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/main/commands/base"
+	"github.com/xtls/xray-core/transport/internet/tls"
+	"golang.org/x/crypto/cryptobyte"
 )
 
 var cmdECH = &base.Command{
-	UsageLine: `{{.Exec}} tls ech [--serverName (string)] [--json]`,
+	UsageLine: `{{.Exec}} tls ech [--serverName (string)] [--pem] [-i "ECHServerKeys (base64.StdEncoding)"]`,
 	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
+Restore ECHConfigs from ECHServerKeys: {{.Exec}} tls ech -i "ECHServerKeys (base64.StdEncoding)"
 `, // Enable PQ signature schemes: {{.Exec}} tls ech --pq-signature-schemes-enabled
 }
 
@@ -27,43 +28,66 @@ func init() {
 	cmdECH.Run = executeECH
 }
 
-var input_pqSignatureSchemesEnabled = cmdECH.Flag.Bool("pqSignatureSchemesEnabled", false, "")
+var input_echServerKeys = cmdECH.Flag.String("i", "", "ECHServerKeys (base64.StdEncoding)")
+
+// 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
+	var kem uint16
 
-	if *input_pqSignatureSchemesEnabled {
-		kem = hpke.KEM_X25519_KYBER768_DRAFT00
-	} else {
-		kem = hpke.KEM_X25519_HKDF_SHA256
-	}
+	// if *input_pqSignatureSchemesEnabled {
+	// 	kem = 0x30 // hpke.KEM_X25519_KYBER768_DRAFT00
+	// } else {
+	kem = hpke.DHKEM_X25519_HKDF_SHA256
+	// }
 
-	echKeySet, err := goech.GenerateECHKeySet(0, *input_serverName, kem)
+	echConfig, priv, err := tls.GenerateECHKeySet(0, *input_serverName, kem)
 	common.Must(err)
 
-	configBuffer, _ := echKeySet.ECHConfig.MarshalBinary()
-	keyBuffer, _ := echKeySet.MarshalBinary()
+	var configBuffer, keyBuffer []byte
+	if *input_echServerKeys == "" {
+		configBytes, _ := tls.MarshalBinary(echConfig)
+		var b cryptobyte.Builder
+		b.AddUint16LengthPrefixed(func(child *cryptobyte.Builder) {
+			child.AddBytes(configBytes)
+		})
+		configBuffer, _ = b.Bytes()
+		var b2 cryptobyte.Builder
+		b2.AddUint16(uint16(len(priv)))
+		b2.AddBytes(priv)
+		b2.AddUint16(uint16(len(configBytes)))
+		b2.AddBytes(configBytes)
+		keyBuffer, _ = b2.Bytes()
+	} else {
+		keySetsByte, err := base64.StdEncoding.DecodeString(*input_echServerKeys)
+		if err != nil {
+			os.Stdout.WriteString("Failed to decode ECHServerKeys: " + err.Error() + "\n")
+			return
+		}
+		keyBuffer = keySetsByte
+		KeySets, err := tls.ConvertToGoECHKeys(keySetsByte)
+		if err != nil {
+			os.Stdout.WriteString("Failed to decode ECHServerKeys: " + err.Error() + "\n")
+			return
+		}
+		var b cryptobyte.Builder
+		for _, keySet := range KeySets {
+			b.AddUint16LengthPrefixed(func(child *cryptobyte.Builder) {
+				child.AddBytes(keySet.Config)
+			})
+		}
+		configBuffer, _ = b.Bytes()
+	}
 
+	if *input_pem {
 		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 {
-		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" + base64.StdEncoding.EncodeToString(configBuffer) + "\n")
+		os.Stdout.WriteString("ECH server keys: \n" + base64.StdEncoding.EncodeToString(keyBuffer) + "\n")
 	}
 }

main/commands/all/tls/ping.go

@@ -40,10 +40,12 @@ func executePing(cmd *base.Command, args []string) {
 	}
 
 	domainWithPort := cmdPing.Flag.Arg(0)
-	fmt.Println("Tls ping: ", domainWithPort)
+	fmt.Println("TLS ping: ", domainWithPort)
 	TargetPort := 443
 	domain, port, err := net.SplitHostPort(domainWithPort)
-	if err == nil {
+	if err != nil {
+		domain = domainWithPort
+	} else {
 		TargetPort, _ = strconv.Atoi(port)
 	}
 
@@ -61,7 +63,7 @@ func executePing(cmd *base.Command, args []string) {
 		}
 		ip = v.IP
 	}
-	fmt.Println("Using IP: ", ip.String())
+	fmt.Println("Using IP: ", ip.String()+":"+strconv.Itoa(TargetPort))
 
 	fmt.Println("-------------------")
 	fmt.Println("Pinging without SNI")
@@ -72,7 +74,7 @@ func executePing(cmd *base.Command, args []string) {
 		}
 		tlsConn := gotls.Client(tcpConn, &gotls.Config{
 			InsecureSkipVerify: true,
-			NextProtos:         []string{"http/1.1"},
+			NextProtos:         []string{"h2", "http/1.1"},
 			MaxVersion:         gotls.VersionTLS13,
 			MinVersion:         gotls.VersionTLS12,
 			// Do not release tool before v5's refactor
@@ -98,7 +100,7 @@ func executePing(cmd *base.Command, args []string) {
 		}
 		tlsConn := gotls.Client(tcpConn, &gotls.Config{
 			ServerName: domain,
-			NextProtos: []string{"http/1.1"},
+			NextProtos: []string{"h2", "http/1.1"},
 			MaxVersion: gotls.VersionTLS13,
 			MinVersion: gotls.VersionTLS12,
 			// Do not release tool before v5's refactor
@@ -106,24 +108,33 @@ func executePing(cmd *base.Command, args []string) {
 		})
 		err = tlsConn.Handshake()
 		if err != nil {
-			fmt.Println("handshake failure: ", err)
+			fmt.Println("Handshake failure: ", err)
 		} else {
-			fmt.Println("handshake succeeded")
+			fmt.Println("Handshake succeeded")
 			printTLSConnDetail(tlsConn)
 			printCertificates(tlsConn.ConnectionState().PeerCertificates)
 		}
 		tlsConn.Close()
 	}
 
-	fmt.Println("Tls ping finished")
+	fmt.Println("-------------------")
+	fmt.Println("TLS ping finished")
 }
 
 func printCertificates(certs []*x509.Certificate) {
+	var leaf *x509.Certificate
+	var length int
 	for _, cert := range certs {
-		if len(cert.DNSNames) == 0 {
-			continue
+		length += len(cert.Raw)
+		if len(cert.DNSNames) != 0 {
+			leaf = cert
 		}
-		fmt.Println("Allowed domains: ", cert.DNSNames)
+	}
+	fmt.Println("Certificate chain's total length: ", length, "(certs count: "+strconv.Itoa(len(certs))+")")
+	if leaf != nil {
+		fmt.Println("Cert's signature algorithm: ", leaf.SignatureAlgorithm.String())
+		fmt.Println("Cert's publicKey algorithm: ", leaf.PublicKeyAlgorithm.String())
+		fmt.Println("Cert's allowed domains: ", leaf.DNSNames)
 	}
 }
 
@@ -134,13 +145,13 @@ func printTLSConnDetail(tlsConn *gotls.Conn) {
 	} else if tlsConn.ConnectionState().Version == gotls.VersionTLS12 {
 		tlsVersion = "TLS 1.2"
 	}
-	fmt.Println("TLS Version:", tlsVersion)
+	fmt.Println("TLS Version: ", tlsVersion)
 	curveID := *(*gotls.CurveID)(unsafe.Pointer(reflect.ValueOf(tlsConn).Elem().FieldByName("curveID").UnsafeAddr()))
 	if curveID != 0 {
 		PostQuantum := (curveID == gotls.X25519MLKEM768)
-		fmt.Println("Post-Quantum key exchange:", PostQuantum, "("+curveID.String()+")")
+		fmt.Println("TLS Post-Quantum key exchange: ", PostQuantum, "("+curveID.String()+")")
 	} else {
-		fmt.Println("Post-Quantum key exchange: false (RSA Exchange)")
+		fmt.Println("TLS Post-Quantum key exchange:  false (RSA Exchange)")
 	}
 }
 

proxy/freedom/freedom.go

@@ -18,6 +18,7 @@ import (
 	"github.com/xtls/xray-core/common/session"
 	"github.com/xtls/xray-core/common/signal"
 	"github.com/xtls/xray-core/common/task"
+	"github.com/xtls/xray-core/common/utils"
 	"github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/policy"
@@ -202,7 +203,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 				writer = buf.NewWriter(conn)
 			}
 		} else {
-			writer = NewPacketWriter(conn, h, ctx, UDPOverride)
+			writer = NewPacketWriter(conn, h, ctx, UDPOverride, destination)
 			if h.config.Noises != nil {
 				errors.LogDebug(ctx, "NOISE", h.config.Noises)
 				writer = &NoisePacketWriter{
@@ -238,7 +239,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 		if destination.Network == net.Network_TCP {
 			reader = buf.NewReader(conn)
 		} else {
-			reader = NewPacketReader(conn, UDPOverride)
+			reader = NewPacketReader(conn, UDPOverride, destination)
 		}
 		if err := buf.Copy(reader, output, buf.UpdateActivity(timer)); err != nil {
 			return errors.New("failed to process response").Base(err)
@@ -273,7 +274,7 @@ func isTLSConn(conn stat.Connection) bool {
 	return false
 }
 
-func NewPacketReader(conn net.Conn, UDPOverride net.Destination) buf.Reader {
+func NewPacketReader(conn net.Conn, UDPOverride net.Destination, DialDest net.Destination) buf.Reader {
 	iConn := conn
 	statConn, ok := iConn.(*stat.CounterConnection)
 	if ok {
@@ -283,10 +284,19 @@ func NewPacketReader(conn net.Conn, UDPOverride net.Destination) buf.Reader {
 	if statConn != nil {
 		counter = statConn.ReadCounter
 	}
-	if c, ok := iConn.(*internet.PacketConnWrapper); ok && UDPOverride.Address == nil && UDPOverride.Port == 0 {
+	if c, ok := iConn.(*internet.PacketConnWrapper); ok {
+		isOverridden := false
+		if UDPOverride.Address != nil || UDPOverride.Port != 0 {
+			isOverridden = true
+		}
+		changedAddress, _, _ := net.SplitHostPort(conn.RemoteAddr().String())
+
 		return &PacketReader{
 			PacketConnWrapper: c,
 			Counter:           counter,
+			IsOverridden:      isOverridden,
+			InitUnchangedAddr: DialDest.Address,
+			InitChangedAddr:   net.ParseAddress(changedAddress),
 		}
 	}
 	return &buf.PacketReader{Reader: conn}
@@ -295,6 +305,9 @@ func NewPacketReader(conn net.Conn, UDPOverride net.Destination) buf.Reader {
 type PacketReader struct {
 	*internet.PacketConnWrapper
 	stats.Counter
+	IsOverridden      bool
+	InitUnchangedAddr net.Address
+	InitChangedAddr   net.Address
 }
 
 func (r *PacketReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
@@ -306,18 +319,27 @@ func (r *PacketReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
 		return nil, err
 	}
 	b.Resize(0, int32(n))
+	// if udp dest addr is changed, we are unable to get the correct src addr
+	// so we don't attach src info to udp packet, break cone behavior, assuming the dial dest is the expected scr addr
+	if !r.IsOverridden {
+		address := net.IPAddress(d.(*net.UDPAddr).IP)
+		if r.InitChangedAddr == address {
+			address = r.InitUnchangedAddr
+		}
 		b.UDP = &net.Destination{
-		Address: net.IPAddress(d.(*net.UDPAddr).IP),
+			Address: address,
 			Port:    net.Port(d.(*net.UDPAddr).Port),
 			Network: net.Network_UDP,
 		}
+	}
 	if r.Counter != nil {
 		r.Counter.Add(int64(n))
 	}
 	return buf.MultiBuffer{b}, nil
 }
 
-func NewPacketWriter(conn net.Conn, h *Handler, ctx context.Context, UDPOverride net.Destination) buf.Writer {
+// DialDest means the dial target used in the dialer when creating conn
+func NewPacketWriter(conn net.Conn, h *Handler, ctx context.Context, UDPOverride net.Destination, DialDest net.Destination) buf.Writer {
 	iConn := conn
 	statConn, ok := iConn.(*stat.CounterConnection)
 	if ok {
@@ -328,12 +350,20 @@ func NewPacketWriter(conn net.Conn, h *Handler, ctx context.Context, UDPOverride
 		counter = statConn.WriteCounter
 	}
 	if c, ok := iConn.(*internet.PacketConnWrapper); ok {
+		// If DialDest is a domain, it will be resolved in dialer
+		// check this behavior and add it to map
+		resolvedUDPAddr := utils.NewTypedSyncMap[string, net.Address]()
+		if DialDest.Address.Family().IsDomain() {
+			RemoteAddress, _, _ := net.SplitHostPort(conn.RemoteAddr().String())
+			resolvedUDPAddr.Store(DialDest.Address.String(), net.ParseAddress(RemoteAddress))
+		}
 		return &PacketWriter{
 			PacketConnWrapper: c,
 			Counter:           counter,
 			Handler:           h,
 			Context:           ctx,
 			UDPOverride:       UDPOverride,
+			resolvedUDPAddr:   resolvedUDPAddr,
 		}
 
 	}
@@ -346,6 +376,12 @@ type PacketWriter struct {
 	*Handler
 	context.Context
 	UDPOverride net.Destination
+
+	// Dest of udp packets might be a domain, we will resolve them to IP
+	// But resolver will return a random one if the domain has many IPs
+	// Resulting in these packets being sent to many different IPs randomly
+	// So, cache and keep the resolve result
+	resolvedUDPAddr *utils.TypedSyncMap[string, net.Address]
 }
 
 func (w *PacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
@@ -364,10 +400,34 @@ func (w *PacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
 			if w.UDPOverride.Port != 0 {
 				b.UDP.Port = w.UDPOverride.Port
 			}
-			if w.Handler.config.hasStrategy() && b.UDP.Address.Family().IsDomain() {
-				ip := w.Handler.resolveIP(w.Context, b.UDP.Address.Domain(), nil)
-				if ip != nil {
+			if b.UDP.Address.Family().IsDomain() {
+				if ip, ok := w.resolvedUDPAddr.Load(b.UDP.Address.Domain()); ok {
 					b.UDP.Address = ip
+				} else {
+					ShouldUseSystemResolver := true
+					if w.Handler.config.hasStrategy() {
+						ip = w.Handler.resolveIP(w.Context, b.UDP.Address.Domain(), nil)
+						if ip != nil {
+							ShouldUseSystemResolver = false
+						}
+						// drop packet if resolve failed when forceIP
+						if ip == nil && w.Handler.config.forceIP() {
+							b.Release()
+							continue
+						}
+					}
+					if ShouldUseSystemResolver {
+						udpAddr, err := net.ResolveUDPAddr("udp", b.UDP.NetAddr())
+						if err != nil {
+							b.Release()
+							continue
+						} else {
+							ip = net.IPAddress(udpAddr.IP)
+						}
+					}
+					if ip != nil {
+						b.UDP.Address, _ = w.resolvedUDPAddr.LoadOrStore(b.UDP.Address.Domain(), ip)
+					}
 				}
 			}
 			destAddr, _ := net.ResolveUDPAddr("udp", b.UDP.NetAddr())

proxy/shadowsocks/server.go

@@ -128,6 +128,7 @@ func (s *Server) handleUDPPayload(ctx context.Context, conn stat.Connection, dis
 
 		conn.Write(data.Bytes())
 	})
+	defer udpServer.RemoveRay()
 
 	inbound := session.InboundFromContext(ctx)
 	var dest *net.Destination

proxy/socks/server.go

@@ -245,13 +245,15 @@ func (s *Server) handleUDPPayload(ctx context.Context, conn stat.Connection, dis
 		udpMessage, err := EncodeUDPPacket(request, payload.Bytes())
 		payload.Release()
 
-		defer udpMessage.Release()
 		if err != nil {
 			errors.LogWarningInner(ctx, err, "failed to write UDP response")
+			return
 		}
+		defer udpMessage.Release()
 
 		conn.Write(udpMessage.Bytes())
 	})
+	defer udpServer.RemoveRay()
 
 	inbound := session.InboundFromContext(ctx)
 	if inbound != nil && inbound.Source.IsValid() {

proxy/trojan/server.go

@@ -259,6 +259,7 @@ func (s *Server) handleUDPPayload(ctx context.Context, clientReader *PacketReade
 			errors.LogWarningInner(ctx, err, "failed to write response")
 		}
 	})
+	defer udpServer.RemoveRay()
 
 	inbound := session.InboundFromContext(ctx)
 	user := inbound.User

proxy/vless/inbound/inbound.go

@@ -206,7 +206,10 @@ func (h *Handler) Process(ctx context.Context, network net.Network, connection s
 
 	first := buf.FromBytes(make([]byte, buf.Size))
 	first.Clear()
-	firstLen, _ := first.ReadFrom(connection)
+	firstLen, errR := first.ReadFrom(connection)
+	if errR != nil {
+		return errR
+	}
 	errors.LogInfo(ctx, "firstLen = ", firstLen)
 
 	reader := &buf.BufferedReader{

transport/internet/reality/config.go

@@ -7,6 +7,7 @@ import (
 	"os"
 	"time"
 
+	"github.com/cloudflare/circl/sign/mldsa/mldsa65"
 	"github.com/xtls/reality"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/transport/internet"
@@ -32,6 +33,10 @@ func (c *Config) GetREALITYConfig() *reality.Config {
 
 		KeyLogWriter: KeyLogWriterFromConfig(c),
 	}
+	if c.Mldsa65Seed != nil {
+		_, key := mldsa65.NewKeyFromSeed((*[32]byte)(c.Mldsa65Seed))
+		config.Mldsa65Key = key.Bytes()
+	}
 	if c.LimitFallbackUpload != nil {
 		config.LimitFallbackUpload.AfterBytes = c.LimitFallbackUpload.AfterBytes
 		config.LimitFallbackUpload.BytesPerSec = c.LimitFallbackUpload.BytesPerSec

transport/internet/reality/config.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
 // 	protoc-gen-go v1.35.1
-// 	protoc        v5.29.4
+// 	protoc        v5.28.2
 // source: transport/internet/reality/config.proto
 
 package reality
@@ -35,15 +35,17 @@ type Config struct {
 	MaxClientVer          []byte         `protobuf:"bytes,8,opt,name=max_client_ver,json=maxClientVer,proto3" json:"max_client_ver,omitempty"`
 	MaxTimeDiff           uint64         `protobuf:"varint,9,opt,name=max_time_diff,json=maxTimeDiff,proto3" json:"max_time_diff,omitempty"`
 	ShortIds              [][]byte       `protobuf:"bytes,10,rep,name=short_ids,json=shortIds,proto3" json:"short_ids,omitempty"`
+	Mldsa65Seed           []byte         `protobuf:"bytes,11,opt,name=mldsa65_seed,json=mldsa65Seed,proto3" json:"mldsa65_seed,omitempty"`
+	LimitFallbackUpload   *LimitFallback `protobuf:"bytes,12,opt,name=limit_fallback_upload,json=limitFallbackUpload,proto3" json:"limit_fallback_upload,omitempty"`
+	LimitFallbackDownload *LimitFallback `protobuf:"bytes,13,opt,name=limit_fallback_download,json=limitFallbackDownload,proto3" json:"limit_fallback_download,omitempty"`
 	Fingerprint           string         `protobuf:"bytes,21,opt,name=Fingerprint,proto3" json:"Fingerprint,omitempty"`
 	ServerName            string         `protobuf:"bytes,22,opt,name=server_name,json=serverName,proto3" json:"server_name,omitempty"`
 	PublicKey             []byte         `protobuf:"bytes,23,opt,name=public_key,json=publicKey,proto3" json:"public_key,omitempty"`
 	ShortId               []byte         `protobuf:"bytes,24,opt,name=short_id,json=shortId,proto3" json:"short_id,omitempty"`
-	SpiderX               string         `protobuf:"bytes,25,opt,name=spider_x,json=spiderX,proto3" json:"spider_x,omitempty"`
-	SpiderY               []int64        `protobuf:"varint,26,rep,packed,name=spider_y,json=spiderY,proto3" json:"spider_y,omitempty"`
-	MasterKeyLog          string         `protobuf:"bytes,27,opt,name=master_key_log,json=masterKeyLog,proto3" json:"master_key_log,omitempty"`
-	LimitFallbackUpload   *LimitFallback `protobuf:"bytes,28,opt,name=limit_fallback_upload,json=limitFallbackUpload,proto3" json:"limit_fallback_upload,omitempty"`
-	LimitFallbackDownload *LimitFallback `protobuf:"bytes,29,opt,name=limit_fallback_download,json=limitFallbackDownload,proto3" json:"limit_fallback_download,omitempty"`
+	Mldsa65Verify         []byte         `protobuf:"bytes,25,opt,name=mldsa65_verify,json=mldsa65Verify,proto3" json:"mldsa65_verify,omitempty"`
+	SpiderX               string         `protobuf:"bytes,26,opt,name=spider_x,json=spiderX,proto3" json:"spider_x,omitempty"`
+	SpiderY               []int64        `protobuf:"varint,27,rep,packed,name=spider_y,json=spiderY,proto3" json:"spider_y,omitempty"`
+	MasterKeyLog          string         `protobuf:"bytes,31,opt,name=master_key_log,json=masterKeyLog,proto3" json:"master_key_log,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -146,6 +148,27 @@ func (x *Config) GetShortIds() [][]byte {
 	return nil
 }
 
+func (x *Config) GetMldsa65Seed() []byte {
+	if x != nil {
+		return x.Mldsa65Seed
+	}
+	return nil
+}
+
+func (x *Config) GetLimitFallbackUpload() *LimitFallback {
+	if x != nil {
+		return x.LimitFallbackUpload
+	}
+	return nil
+}
+
+func (x *Config) GetLimitFallbackDownload() *LimitFallback {
+	if x != nil {
+		return x.LimitFallbackDownload
+	}
+	return nil
+}
+
 func (x *Config) GetFingerprint() string {
 	if x != nil {
 		return x.Fingerprint
@@ -174,6 +197,13 @@ func (x *Config) GetShortId() []byte {
 	return nil
 }
 
+func (x *Config) GetMldsa65Verify() []byte {
+	if x != nil {
+		return x.Mldsa65Verify
+	}
+	return nil
+}
+
 func (x *Config) GetSpiderX() string {
 	if x != nil {
 		return x.SpiderX
@@ -195,20 +225,6 @@ func (x *Config) GetMasterKeyLog() string {
 	return ""
 }
 
-func (x *Config) GetLimitFallbackUpload() *LimitFallback {
-	if x != nil {
-		return x.LimitFallbackUpload
-	}
-	return nil
-}
-
-func (x *Config) GetLimitFallbackDownload() *LimitFallback {
-	if x != nil {
-		return x.LimitFallbackDownload
-	}
-	return nil
-}
-
 type LimitFallback struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -277,7 +293,7 @@ var file_transport_internet_reality_config_proto_rawDesc = []byte{
 	0x72, 0x6e, 0x65, 0x74, 0x2f, 0x72, 0x65, 0x61, 0x6c, 0x69, 0x74, 0x79, 0x2f, 0x63, 0x6f, 0x6e,
 	0x66, 0x69, 0x67, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x1f, 0x78, 0x72, 0x61, 0x79, 0x2e,
 	0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e,
-	0x65, 0x74, 0x2e, 0x72, 0x65, 0x61, 0x6c, 0x69, 0x74, 0x79, 0x22, 0xce, 0x05, 0x0a, 0x06, 0x43,
+	0x65, 0x74, 0x2e, 0x72, 0x65, 0x61, 0x6c, 0x69, 0x74, 0x79, 0x22, 0x98, 0x06, 0x0a, 0x06, 0x43,
 	0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x12, 0x0a, 0x04, 0x73, 0x68, 0x6f, 0x77, 0x18, 0x01, 0x20,
 	0x01, 0x28, 0x08, 0x52, 0x04, 0x73, 0x68, 0x6f, 0x77, 0x12, 0x12, 0x0a, 0x04, 0x64, 0x65, 0x73,
 	0x74, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x64, 0x65, 0x73, 0x74, 0x12, 0x12, 0x0a,
@@ -296,50 +312,55 @@ var file_transport_internet_reality_config_proto_rawDesc = []byte{
 	0x65, 0x5f, 0x64, 0x69, 0x66, 0x66, 0x18, 0x09, 0x20, 0x01, 0x28, 0x04, 0x52, 0x0b, 0x6d, 0x61,
 	0x78, 0x54, 0x69, 0x6d, 0x65, 0x44, 0x69, 0x66, 0x66, 0x12, 0x1b, 0x0a, 0x09, 0x73, 0x68, 0x6f,
 	0x72, 0x74, 0x5f, 0x69, 0x64, 0x73, 0x18, 0x0a, 0x20, 0x03, 0x28, 0x0c, 0x52, 0x08, 0x73, 0x68,
-	0x6f, 0x72, 0x74, 0x49, 0x64, 0x73, 0x12, 0x20, 0x0a, 0x0b, 0x46, 0x69, 0x6e, 0x67, 0x65, 0x72,
-	0x70, 0x72, 0x69, 0x6e, 0x74, 0x18, 0x15, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0b, 0x46, 0x69, 0x6e,
-	0x67, 0x65, 0x72, 0x70, 0x72, 0x69, 0x6e, 0x74, 0x12, 0x1f, 0x0a, 0x0b, 0x73, 0x65, 0x72, 0x76,
-	0x65, 0x72, 0x5f, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x16, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0a, 0x73,
-	0x65, 0x72, 0x76, 0x65, 0x72, 0x4e, 0x61, 0x6d, 0x65, 0x12, 0x1d, 0x0a, 0x0a, 0x70, 0x75, 0x62,
-	0x6c, 0x69, 0x63, 0x5f, 0x6b, 0x65, 0x79, 0x18, 0x17, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x09, 0x70,
-	0x75, 0x62, 0x6c, 0x69, 0x63, 0x4b, 0x65, 0x79, 0x12, 0x19, 0x0a, 0x08, 0x73, 0x68, 0x6f, 0x72,
-	0x74, 0x5f, 0x69, 0x64, 0x18, 0x18, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x07, 0x73, 0x68, 0x6f, 0x72,
-	0x74, 0x49, 0x64, 0x12, 0x19, 0x0a, 0x08, 0x73, 0x70, 0x69, 0x64, 0x65, 0x72, 0x5f, 0x78, 0x18,
-	0x19, 0x20, 0x01, 0x28, 0x09, 0x52, 0x07, 0x73, 0x70, 0x69, 0x64, 0x65, 0x72, 0x58, 0x12, 0x19,
-	0x0a, 0x08, 0x73, 0x70, 0x69, 0x64, 0x65, 0x72, 0x5f, 0x79, 0x18, 0x1a, 0x20, 0x03, 0x28, 0x03,
-	0x52, 0x07, 0x73, 0x70, 0x69, 0x64, 0x65, 0x72, 0x59, 0x12, 0x24, 0x0a, 0x0e, 0x6d, 0x61, 0x73,
-	0x74, 0x65, 0x72, 0x5f, 0x6b, 0x65, 0x79, 0x5f, 0x6c, 0x6f, 0x67, 0x18, 0x1b, 0x20, 0x01, 0x28,
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+	0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

transport/internet/reality/config.proto

@@ -18,16 +18,19 @@ message Config {
   uint64 max_time_diff = 9;
   repeated bytes short_ids = 10;
 
+  bytes mldsa65_seed = 11;
+  LimitFallback limit_fallback_upload = 12;
+  LimitFallback limit_fallback_download = 13;
+
   string Fingerprint = 21;
   string server_name = 22;
   bytes public_key = 23;
   bytes short_id = 24;
-  string spider_x = 25;
-  repeated int64 spider_y = 26;
-  string master_key_log = 27;
+  bytes mldsa65_verify = 25;
+  string spider_x = 26;
+  repeated int64 spider_y = 27;
 
-  LimitFallback limit_fallback_upload = 28;
-  LimitFallback limit_fallback_download = 29;
+  string master_key_log = 31;
 }
 
 message LimitFallback {

transport/internet/reality/reality.go

@@ -23,6 +23,7 @@ import (
 	"time"
 	"unsafe"
 
+	"github.com/cloudflare/circl/sign/mldsa/mldsa65"
 	utls "github.com/refraction-networking/utls"
 	"github.com/xtls/reality"
 	"github.com/xtls/xray-core/common/crypto"
@@ -56,6 +57,7 @@ func Server(c net.Conn, config *reality.Config) (net.Conn, error) {
 
 type UConn struct {
 	*utls.UConn
+	Config     *Config
 	ServerName string
 	AuthKey    []byte
 	Verified   bool
@@ -73,16 +75,34 @@ func (c *UConn) HandshakeAddress() net.Address {
 }
 
 func (c *UConn) VerifyPeerCertificate(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
+	if c.Config.Show {
+		localAddr := c.LocalAddr().String()
+		curveID := *(*utls.CurveID)(unsafe.Pointer(reflect.ValueOf(c).Elem().FieldByName("curveID").UnsafeAddr()))
+		fmt.Printf("REALITY localAddr: %v\tis using X25519MLKEM768 for TLS' communication: %v\n", localAddr, curveID == utls.X25519MLKEM768)
+		fmt.Printf("REALITY localAddr: %v\tis using ML-DSA-65 for cert's extra verification: %v\n", localAddr, len(c.Config.Mldsa65Verify) > 0)
+	}
 	p, _ := reflect.TypeOf(c.Conn).Elem().FieldByName("peerCertificates")
 	certs := *(*([]*x509.Certificate))(unsafe.Pointer(uintptr(unsafe.Pointer(c.Conn)) + p.Offset))
 	if pub, ok := certs[0].PublicKey.(ed25519.PublicKey); ok {
 		h := hmac.New(sha512.New, c.AuthKey)
 		h.Write(pub)
 		if bytes.Equal(h.Sum(nil), certs[0].Signature) {
+			if len(c.Config.Mldsa65Verify) > 0 {
+				if len(certs[0].Extensions) > 0 {
+					h.Write(c.HandshakeState.Hello.Raw)
+					h.Write(c.HandshakeState.ServerHello.Raw)
+					verify, _ := mldsa65.Scheme().UnmarshalBinaryPublicKey(c.Config.Mldsa65Verify)
+					if mldsa65.Verify(verify.(*mldsa65.PublicKey), h.Sum(nil), nil, certs[0].Extensions[0].Value) {
 						c.Verified = true
 						return nil
 					}
 				}
+			} else {
+				c.Verified = true
+				return nil
+			}
+		}
+	}
 	opts := x509.VerifyOptions{
 		DNSName:       c.ServerName,
 		Intermediates: x509.NewCertPool(),
@@ -98,7 +118,9 @@ func (c *UConn) VerifyPeerCertificate(rawCerts [][]byte, verifiedChains [][]*x50
 
 func UClient(c net.Conn, config *Config, ctx context.Context, dest net.Destination) (net.Conn, error) {
 	localAddr := c.LocalAddr().String()
-	uConn := &UConn{}
+	uConn := &UConn{
+		Config: config,
+	}
 	utlsConfig := &utls.Config{
 		VerifyPeerCertificate:  uConn.VerifyPeerCertificate,
 		ServerName:             config.ServerName,
@@ -127,16 +149,20 @@ func UClient(c net.Conn, config *Config, ctx context.Context, dest net.Destinati
 		binary.BigEndian.PutUint32(hello.SessionId[4:], uint32(time.Now().Unix()))
 		copy(hello.SessionId[8:], config.ShortId)
 		if config.Show {
-			errors.LogInfo(ctx, fmt.Sprintf("REALITY localAddr: %v\thello.SessionId[:16]: %v\n", localAddr, hello.SessionId[:16]))
+			fmt.Printf("REALITY localAddr: %v\thello.SessionId[:16]: %v\n", localAddr, hello.SessionId[:16])
 		}
 		publicKey, err := ecdh.X25519().NewPublicKey(config.PublicKey)
 		if err != nil {
 			return nil, errors.New("REALITY: publicKey == nil")
 		}
-		if uConn.HandshakeState.State13.KeyShareKeys.Ecdhe == nil {
+		ecdhe := uConn.HandshakeState.State13.KeyShareKeys.Ecdhe
+		if ecdhe == nil {
+			ecdhe = uConn.HandshakeState.State13.KeyShareKeys.MlkemEcdhe
+		}
+		if ecdhe == nil {
 			return nil, errors.New("Current fingerprint ", uConn.ClientHelloID.Client, uConn.ClientHelloID.Version, " does not support TLS 1.3, REALITY handshake cannot establish.")
 		}
-		uConn.AuthKey, _ = uConn.HandshakeState.State13.KeyShareKeys.Ecdhe.ECDH(publicKey)
+		uConn.AuthKey, _ = ecdhe.ECDH(publicKey)
 		if uConn.AuthKey == nil {
 			return nil, errors.New("REALITY: SharedKey == nil")
 		}
@@ -146,7 +172,7 @@ func UClient(c net.Conn, config *Config, ctx context.Context, dest net.Destinati
 		block, _ := aes.NewCipher(uConn.AuthKey)
 		aead, _ := cipher.NewGCM(block)
 		if config.Show {
-			errors.LogInfo(ctx, fmt.Sprintf("REALITY localAddr: %v\tuConn.AuthKey[:16]: %v\tAEAD: %T\n", localAddr, uConn.AuthKey[:16], aead))
+			fmt.Printf("REALITY localAddr: %v\tuConn.AuthKey[:16]: %v\tAEAD: %T\n", localAddr, uConn.AuthKey[:16], aead)
 		}
 		aead.Seal(hello.SessionId[:0], hello.Random[20:], hello.SessionId[:16], hello.Raw)
 		copy(hello.Raw[39:], hello.SessionId)
@@ -155,14 +181,14 @@ func UClient(c net.Conn, config *Config, ctx context.Context, dest net.Destinati
 		return nil, err
 	}
 	if config.Show {
-		errors.LogInfo(ctx, fmt.Sprintf("REALITY localAddr: %v\tuConn.Verified: %v\n", localAddr, uConn.Verified))
+		fmt.Printf("REALITY localAddr: %v\tuConn.Verified: %v\n", localAddr, uConn.Verified)
 	}
 	if !uConn.Verified {
 		go func() {
 			client := &http.Client{
 				Transport: &http2.Transport{
 					DialTLSContext: func(ctx context.Context, network, addr string, cfg *gotls.Config) (net.Conn, error) {
-						errors.LogInfo(ctx, fmt.Sprintf("REALITY localAddr: %v\tDialTLSContext\n", localAddr))
+						fmt.Printf("REALITY localAddr: %v\tDialTLSContext\n", localAddr)
 						return uConn, nil
 					},
 				},
@@ -199,7 +225,7 @@ func UClient(c net.Conn, config *Config, ctx context.Context, dest net.Destinati
 				}
 				req.Header.Set("User-Agent", fingerprint.Client) // TODO: User-Agent map
 				if first && config.Show {
-					errors.LogInfo(ctx, fmt.Sprintf("REALITY localAddr: %v\treq.UserAgent(): %v\n", localAddr, req.UserAgent()))
+					fmt.Printf("REALITY localAddr: %v\treq.UserAgent(): %v\n", localAddr, req.UserAgent())
 				}
 				times := 1
 				if !first {
@@ -227,9 +253,9 @@ func UClient(c net.Conn, config *Config, ctx context.Context, dest net.Destinati
 					}
 					req.URL.Path = getPathLocked(paths)
 					if config.Show {
-						errors.LogInfo(ctx, fmt.Sprintf("REALITY localAddr: %v\treq.Referer(): %v\n", localAddr, req.Referer()))
-						errors.LogInfo(ctx, fmt.Sprintf("REALITY localAddr: %v\tlen(body): %v\n", localAddr, len(body)))
-						errors.LogInfo(ctx, fmt.Sprintf("REALITY localAddr: %v\tlen(paths): %v\n", localAddr, len(paths)))
+						fmt.Printf("REALITY localAddr: %v\treq.Referer(): %v\n", localAddr, req.Referer())
+						fmt.Printf("REALITY localAddr: %v\tlen(body): %v\n", localAddr, len(body))
+						fmt.Printf("REALITY localAddr: %v\tlen(paths): %v\n", localAddr, len(paths))
 					}
 					maps.Unlock()
 					if !first {

transport/internet/sockopt_linux.go

@@ -64,26 +64,6 @@ func applyOutboundSocketOptions(network string, address string, fd uintptr, conf
 			}
 		}
 
-		if config.TcpKeepAliveInterval > 0 || config.TcpKeepAliveIdle > 0 {
-			if config.TcpKeepAliveInterval > 0 {
-				if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, int(config.TcpKeepAliveInterval)); err != nil {
-					return errors.New("failed to set TCP_KEEPINTVL", err)
-				}
-			}
-			if config.TcpKeepAliveIdle > 0 {
-				if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPIDLE, int(config.TcpKeepAliveIdle)); err != nil {
-					return errors.New("failed to set TCP_KEEPIDLE", err)
-				}
-			}
-			if err := syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, 1); err != nil {
-				return errors.New("failed to set SO_KEEPALIVE", err)
-			}
-		} else if config.TcpKeepAliveInterval < 0 || config.TcpKeepAliveIdle < 0 {
-			if err := syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, 0); err != nil {
-				return errors.New("failed to unset SO_KEEPALIVE", err)
-			}
-		}
-
 		if config.TcpCongestion != "" {
 			if err := syscall.SetsockoptString(int(fd), syscall.SOL_TCP, syscall.TCP_CONGESTION, config.TcpCongestion); err != nil {
 				return errors.New("failed to set TCP_CONGESTION", err)

transport/internet/system_dialer.go

@@ -3,6 +3,7 @@ package internet
 import (
 	"context"
 	"math/rand"
+	gonet "net"
 	"syscall"
 	"time"
 
@@ -87,14 +88,34 @@ func (d *DefaultSystemDialer) Dial(ctx context.Context, src net.Address, dest ne
 			Dest: destAddr,
 		}, nil
 	}
-	goStdKeepAlive := time.Duration(0)
-	if sockopt != nil && (sockopt.TcpKeepAliveInterval != 0 || sockopt.TcpKeepAliveIdle != 0) {
-		goStdKeepAlive = time.Duration(-1)
+	// Chrome defaults
+	keepAliveConfig := gonet.KeepAliveConfig{
+		Enable:   true,
+		Idle:     45 * time.Second,
+		Interval: 45 * time.Second,
+		Count:    -1,
+	}
+	keepAlive := time.Duration(0)
+	if sockopt != nil {
+		if sockopt.TcpKeepAliveIdle*sockopt.TcpKeepAliveInterval < 0 {
+			return nil, errors.New("invalid TcpKeepAliveIdle or TcpKeepAliveInterval value: ", sockopt.TcpKeepAliveIdle, " ", sockopt.TcpKeepAliveInterval)
+		}
+		if sockopt.TcpKeepAliveIdle < 0 || sockopt.TcpKeepAliveInterval < 0 {
+			keepAlive = -1
+			keepAliveConfig.Enable = false
+		}
+		if sockopt.TcpKeepAliveIdle > 0 {
+			keepAliveConfig.Idle = time.Duration(sockopt.TcpKeepAliveIdle) * time.Second
+		}
+		if sockopt.TcpKeepAliveInterval > 0 {
+			keepAliveConfig.Interval = time.Duration(sockopt.TcpKeepAliveInterval) * time.Second
+		}
 	}
 	dialer := &net.Dialer{
 		Timeout:         time.Second * 16,
 		LocalAddr:       resolveSrcAddr(dest.Network, src),
-		KeepAlive: goStdKeepAlive,
+		KeepAlive:       keepAlive,
+		KeepAliveConfig: keepAliveConfig,
 	}
 
 	if sockopt != nil || len(d.controllers) > 0 {

transport/internet/system_listener.go

@@ -2,6 +2,7 @@ package internet
 
 import (
 	"context"
+	gonet "net"
 	"os"
 	"runtime"
 	"strconv"
@@ -88,9 +89,25 @@ func (dl *DefaultListener) Listen(ctx context.Context, addr net.Addr, sockopt *S
 		network = addr.Network()
 		address = addr.String()
 		lc.Control = getControlFunc(ctx, sockopt, dl.controllers)
+		// default disable keepalive
+		lc.KeepAlive = -1
 		if sockopt != nil {
-			if sockopt.TcpKeepAliveInterval != 0 || sockopt.TcpKeepAliveIdle != 0 {
-				lc.KeepAlive = time.Duration(-1)
+			if sockopt.TcpKeepAliveIdle*sockopt.TcpKeepAliveInterval < 0 {
+				return nil, errors.New("invalid TcpKeepAliveIdle or TcpKeepAliveInterval value: ", sockopt.TcpKeepAliveIdle, " ", sockopt.TcpKeepAliveInterval)
+			}
+			lc.KeepAliveConfig = gonet.KeepAliveConfig{
+				Enable:   false,
+				Idle:     -1,
+				Interval: -1,
+				Count:    -1,
+			}
+			if sockopt.TcpKeepAliveIdle > 0 {
+				lc.KeepAliveConfig.Enable = true
+				lc.KeepAliveConfig.Idle = time.Duration(sockopt.TcpKeepAliveIdle) * time.Second
+			}
+			if sockopt.TcpKeepAliveInterval > 0 {
+				lc.KeepAliveConfig.Enable = true
+				lc.KeepAliveConfig.Interval = time.Duration(sockopt.TcpKeepAliveInterval) * time.Second
 			}
 			if sockopt.TcpMptcp {
 				lc.SetMultipathTCP(true)

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.EchServerKeys) > 0 {
+		err := ApplyECH(c, config)
+		if err != nil {
+			errors.LogError(context.Background(), err)
+		}
+	}
 
 	return config
 }

transport/internet/tls/config.pb.go

@@ -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"`
+	EchServerKeys         []byte   `protobuf:"bytes,19,opt,name=ech_server_keys,json=echServerKeys,proto3" json:"ech_server_keys,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) GetEchServerKeys() []byte {
+	if x != nil {
+		return x.EchServerKeys
+	}
+	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, 0xea, 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,
@@ -442,7 +458,12 @@ 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,
+	0x66, 0x69, 0x67, 0x5f, 0x6c, 0x69, 0x73, 0x74, 0x18, 0x12, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0d,
+	0x65, 0x63, 0x68, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x4c, 0x69, 0x73, 0x74, 0x12, 0x26, 0x0a,
+	0x0f, 0x65, 0x63, 0x68, 0x5f, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x5f, 0x6b, 0x65, 0x79, 0x73,
+	0x18, 0x13, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x0d, 0x65, 0x63, 0x68, 0x53, 0x65, 0x72, 0x76, 0x65,
+	0x72, 0x4b, 0x65, 0x79, 0x73, 0x42, 0x73, 0x0a, 0x1f, 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, 0x2e, 0x74, 0x6c, 0x73, 0x50, 0x01, 0x5a, 0x30, 0x67, 0x69, 0x74, 0x68,
 	0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79,

transport/internet/tls/config.proto

@@ -91,4 +91,8 @@ message Config {
      @Critical
   */
   repeated string verify_peer_cert_in_names = 17;
+
+  string ech_config_list = 18;
+
+  bytes ech_server_keys = 19;
 }

transport/internet/tls/ech.go

@@ -0,0 +1,367 @@
+package tls
+
+import (
+	"bytes"
+	"context"
+	"crypto/ecdh"
+	"crypto/rand"
+	"crypto/tls"
+	"encoding/base64"
+	"encoding/binary"
+	"io"
+	"net/http"
+	"strings"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/miekg/dns"
+	"github.com/xtls/reality"
+	"github.com/xtls/reality/hpke"
+	"github.com/xtls/xray-core/common/errors"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/utils"
+	"github.com/xtls/xray-core/transport/internet"
+	"golang.org/x/crypto/cryptobyte"
+)
+
+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.Contains(c.EchConfigList, "://") {
+			// 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
+			}
+		} else {
+			ECHConfig, err = base64.StdEncoding.DecodeString(c.EchConfigList)
+			if err != nil {
+				return errors.New("Failed to unmarshal ECHConfigList: ", err)
+			}
+		}
+
+		config.EncryptedClientHelloConfigList = ECHConfig
+	}
+
+	// for server
+	if len(c.EchServerKeys) != 0 {
+		KeySets, err := ConvertToGoECHKeys(c.EchServerKeys)
+		if err != nil {
+			return errors.New("Failed to unmarshal ECHKeySetList: ", err)
+		}
+		config.EncryptedClientHelloKeys = KeySets
+	}
+
+	return nil
+}
+
+type ECHConfigCache struct {
+	configRecord atomic.Pointer[echConfigRecord]
+	// updateLock is not for preventing concurrent read/write, but for preventing concurrent update
+	UpdateLock sync.Mutex
+}
+
+type echConfigRecord struct {
+	config []byte
+	expire time.Time
+}
+
+var (
+	GlobalECHConfigCache = utils.NewTypedSyncMap[string, *ECHConfigCache]()
+	clientForECHDOH      = utils.NewTypedSyncMap[string, *http.Client]()
+)
+
+// Update updates the ECH config for given domain and server.
+// this method is concurrent safe, only one update request will be sent, others get the cache.
+// if isLockedUpdate is true, it will not try to acquire the lock.
+func (c *ECHConfigCache) Update(domain string, server string, isLockedUpdate bool) ([]byte, error) {
+	if !isLockedUpdate {
+		c.UpdateLock.Lock()
+		defer c.UpdateLock.Unlock()
+	}
+	// Double check cache after acquiring lock
+	configRecord := c.configRecord.Load()
+	if configRecord.expire.After(time.Now()) {
+		errors.LogDebug(context.Background(), "Cache hit for domain after double check: ", domain)
+		return configRecord.config, 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 nil, err
+	}
+	configRecord = &echConfigRecord{
+		config: echConfig,
+		expire: time.Now().Add(time.Duration(ttl) * time.Second),
+	}
+	c.configRecord.Store(configRecord)
+	return configRecord.config, nil
+}
+
+// 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) {
+	echConfigCache, ok := GlobalECHConfigCache.Load(domain)
+	if !ok {
+		echConfigCache = &ECHConfigCache{}
+		echConfigCache.configRecord.Store(&echConfigRecord{})
+		echConfigCache, _ = GlobalECHConfigCache.LoadOrStore(domain, echConfigCache)
+	}
+	configRecord := echConfigCache.configRecord.Load()
+	if configRecord.expire.After(time.Now()) {
+		errors.LogDebug(context.Background(), "Cache hit for domain: ", domain)
+		return configRecord.config, nil
+	}
+
+	// If expire is zero value, it means we are in initial state, wait for the query to finish
+	// otherwise return old value immediately and update in a goroutine
+	// but if the cache is too old, wait for update
+	if configRecord.expire == (time.Time{}) || configRecord.expire.Add(time.Hour*6).Before(time.Now()) {
+		return echConfigCache.Update(domain, server, false)
+	} else {
+		// If someone already acquired the lock, it means it is updating, do not start another update goroutine
+		if echConfigCache.UpdateLock.TryLock() {
+			go func() {
+				defer echConfigCache.UpdateLock.Unlock()
+				echConfigCache.Update(domain, server, true)
+			}()
+		}
+		return configRecord.config, 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) {
+	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
+		}
+		var client *http.Client
+		if client, _ = clientForECHDOH.Load(server); client == nil {
+			// 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
+				},
+			}
+			c := &http.Client{
+				Timeout:   5 * time.Second,
+				Transport: tr,
+			}
+			client, _ = clientForECHDOH.LoadOrStore(server, c)
+		}
+		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 func() {
+			err := conn.Close()
+			if err != nil {
+				errors.LogDebug(context.Background(), "Failed to close connection: ", err)
+			}
+		}()
+		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")
+}
+
+// reference github.com/OmarTariq612/goech
+func MarshalBinary(ech reality.EchConfig) ([]byte, error) {
+	var b cryptobyte.Builder
+	b.AddUint16(ech.Version)
+	b.AddUint16LengthPrefixed(func(child *cryptobyte.Builder) {
+		child.AddUint8(ech.ConfigID)
+		child.AddUint16(ech.KemID)
+		child.AddUint16(uint16(len(ech.PublicKey)))
+		child.AddBytes(ech.PublicKey)
+		child.AddUint16LengthPrefixed(func(child *cryptobyte.Builder) {
+			for _, cipherSuite := range ech.SymmetricCipherSuite {
+				child.AddUint16(cipherSuite.KDFID)
+				child.AddUint16(cipherSuite.AEADID)
+			}
+		})
+		child.AddUint8(ech.MaxNameLength)
+		child.AddUint8(uint8(len(ech.PublicName)))
+		child.AddBytes(ech.PublicName)
+		child.AddUint16LengthPrefixed(func(child *cryptobyte.Builder) {
+			for _, extention := range ech.Extensions {
+				child.AddUint16(extention.Type)
+				child.AddBytes(extention.Data)
+			}
+		})
+	})
+	return b.Bytes()
+}
+
+var ErrInvalidLen = errors.New("goech: invalid length")
+
+func ConvertToGoECHKeys(data []byte) ([]tls.EncryptedClientHelloKey, error) {
+	var keys []tls.EncryptedClientHelloKey
+	s := cryptobyte.String(data)
+	for !s.Empty() {
+		if len(s) < 2 {
+			return keys, ErrInvalidLen
+		}
+		keyLength := int(binary.BigEndian.Uint16(s[:2]))
+		if len(s) < keyLength+4 {
+			return keys, ErrInvalidLen
+		}
+		configLength := int(binary.BigEndian.Uint16(s[keyLength+2 : keyLength+4]))
+		if len(s) < 2+keyLength+2+configLength {
+			return keys, ErrInvalidLen
+		}
+		child := cryptobyte.String(s[:2+keyLength+2+configLength])
+		var (
+			sk, config cryptobyte.String
+		)
+		if !child.ReadUint16LengthPrefixed(&sk) || !child.ReadUint16LengthPrefixed(&config) || !child.Empty() {
+			return keys, ErrInvalidLen
+		}
+		if !s.Skip(2 + keyLength + 2 + configLength) {
+			return keys, ErrInvalidLen
+		}
+		keys = append(keys, tls.EncryptedClientHelloKey{
+			Config:     config,
+			PrivateKey: sk,
+		})
+	}
+	return keys, nil
+}
+
+const ExtensionEncryptedClientHello = 0xfe0d
+const KDF_HKDF_SHA384 = 0x0002
+const KDF_HKDF_SHA512 = 0x0003
+
+func GenerateECHKeySet(configID uint8, domain string, kem uint16) (reality.EchConfig, []byte, error) {
+	config := reality.EchConfig{
+		Version:    ExtensionEncryptedClientHello,
+		ConfigID:   configID,
+		PublicName: []byte(domain),
+		KemID:      kem,
+		SymmetricCipherSuite: []reality.EchCipher{
+			{KDFID: hpke.KDF_HKDF_SHA256, AEADID: hpke.AEAD_AES_128_GCM},
+			{KDFID: hpke.KDF_HKDF_SHA256, AEADID: hpke.AEAD_AES_256_GCM},
+			{KDFID: hpke.KDF_HKDF_SHA256, AEADID: hpke.AEAD_ChaCha20Poly1305},
+			{KDFID: KDF_HKDF_SHA384, AEADID: hpke.AEAD_AES_128_GCM},
+			{KDFID: KDF_HKDF_SHA384, AEADID: hpke.AEAD_AES_256_GCM},
+			{KDFID: KDF_HKDF_SHA384, AEADID: hpke.AEAD_ChaCha20Poly1305},
+			{KDFID: KDF_HKDF_SHA512, AEADID: hpke.AEAD_AES_128_GCM},
+			{KDFID: KDF_HKDF_SHA512, AEADID: hpke.AEAD_AES_256_GCM},
+			{KDFID: KDF_HKDF_SHA512, AEADID: hpke.AEAD_ChaCha20Poly1305},
+		},
+		MaxNameLength: 0,
+		Extensions:    nil,
+	}
+	// if kem == hpke.DHKEM_X25519_HKDF_SHA256 {
+	curve := ecdh.X25519()
+	priv := make([]byte, 32) //x25519
+	_, err := io.ReadFull(rand.Reader, priv)
+	if err != nil {
+		return config, nil, err
+	}
+	privKey, _ := curve.NewPrivateKey(priv)
+	config.PublicKey = privKey.PublicKey().Bytes()
+	return config, priv, nil
+	// }
+	// TODO: add mlkem768 (former kyber768 draft00). The golang mlkem private key is 64 bytes seed?
+}

transport/internet/tls/ech_test.go

@@ -0,0 +1,43 @@
+package tls_test
+
+import (
+	"io"
+	"net/http"
+	"strings"
+	"sync"
+	"testing"
+
+	"github.com/xtls/xray-core/common"
+	. "github.com/xtls/xray-core/transport/internet/tls"
+)
+
+func TestECHDial(t *testing.T) {
+	config := &Config{
+		ServerName:    "encryptedsni.com",
+		EchConfigList: "udp://1.1.1.1",
+	}
+	// test concurrent Dial(to test cache problem)
+	wg := sync.WaitGroup{}
+	for range 10 {
+		wg.Add(1)
+		go func() {
+			TLSConfig := config.GetTLSConfig()
+			TLSConfig.NextProtos = []string{"http/1.1"}
+			client := &http.Client{
+				Transport: &http.Transport{
+					TLSClientConfig: TLSConfig,
+				},
+			}
+			resp, err := client.Get("https://encryptedsni.com/cdn-cgi/trace")
+			common.Must(err)
+			defer resp.Body.Close()
+			body, err := io.ReadAll(resp.Body)
+			common.Must(err)
+			if !strings.Contains(string(body), "sni=encrypted") {
+				t.Error("ECH Dial success but SNI is not encrypted")
+			}
+			wg.Done()
+		}()
+	}
+	wg.Wait()
+}

transport/internet/tls/tls.go

@@ -134,6 +134,7 @@ func copyConfig(c *tls.Config) *utls.Config {
 		InsecureSkipVerify:             c.InsecureSkipVerify,
 		VerifyPeerCertificate:          c.VerifyPeerCertificate,
 		KeyLogWriter:                   c.KeyLogWriter,
+		EncryptedClientHelloConfigList: c.EncryptedClientHelloConfigList,
 	}
 }
 

transport/internet/udp/dispatcher.go

@@ -44,6 +44,10 @@ func NewDispatcher(dispatcher routing.Dispatcher, callback ResponseCallback) *Di
 func (v *Dispatcher) RemoveRay() {
 	v.Lock()
 	defer v.Unlock()
+	v.removeRay()
+}
+
+func (v *Dispatcher) removeRay() {
 	if v.conn != nil {
 		common.Interrupt(v.conn.link.Reader)
 		common.Close(v.conn.link.Writer)
@@ -62,9 +66,15 @@ func (v *Dispatcher) getInboundRay(ctx context.Context, dest net.Destination) (*
 	errors.LogInfo(ctx, "establishing new connection for ", dest)
 
 	ctx, cancel := context.WithCancel(ctx)
+	entry := &connEntry{}
 	removeRay := func() {
+		v.Lock()
+		defer v.Unlock()
+		// sometimes the entry is already removed by others, don't close again
+		if entry == v.conn {
 			cancel()
-		v.RemoveRay()
+			v.removeRay()
+		}
 	}
 	timer := signal.CancelAfterInactivity(ctx, removeRay, time.Minute)
 
@@ -73,7 +83,7 @@ func (v *Dispatcher) getInboundRay(ctx context.Context, dest net.Destination) (*
 		return nil, errors.New("failed to dispatch request to ", dest).Base(err)
 	}
 
-	entry := &connEntry{
+	*entry = connEntry{
 		link:   link,
 		timer:  timer,
 		cancel: removeRay,

transport/internet/udp/hub.go

@@ -40,6 +40,14 @@ func ListenUDP(ctx context.Context, address net.Address, port net.Port, streamSe
 		opt(hub)
 	}
 
+	if address.Family().IsDomain() && address.Domain() == "localhost" {
+		address = net.LocalHostIP
+	}
+
+	if address.Family().IsDomain() {
+		return nil, errors.New("domain address is not allowed for listening: ", address.Domain())
+	}
+
 	var sockopt *internet.SocketConfig
 	if streamSettings != nil {
 		sockopt = streamSettings.SocketSettings