chore: merge upstream

2026-05-17 00:05:58 +03:00 · 2026-02-19 15:03:12 +00:00
parent 56d294542c 12ee51e4bb
commit 48e1410d10
156 changed files with 8837 additions and 2351 deletions
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -34,6 +34,22 @@ jobs:
        if: steps.check-assets.outputs.missing == 'true'
        run: sleep 90

+  check-proto:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout codebase
+        uses: actions/checkout@v6
+      - name: Check Proto Version Header
+        run: |
+          head -n 4 core/config.pb.go > ref.txt
+          find . -name "*.pb.go" ! -name "*_grpc.pb.go" -print0 | while IFS= read -r -d '' file; do
+            if ! cmp -s ref.txt <(head -n 4 "$file"); then
+              echo "Error: Header mismatch in $file"
+              head -n 4 "$file"
+              exit 1
+            fi
+          done
+
  test:
    needs: check-assets
    permissions:
--- a/app/dns/dns.go
+++ b/app/dns/dns.go
@@ -12,9 +12,11 @@ import (
 	"sync"
 	"time"

+	"github.com/amnezia-vpn/amnezia-xray-core/app/router"
 	"github.com/amnezia-vpn/amnezia-xray-core/common"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/net"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/platform"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/session"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/strmatcher"
 	"github.com/amnezia-vpn/amnezia-xray-core/features/dns"
@@ -83,9 +85,31 @@ func New(ctx context.Context, config *Config) (*DNS, error) {
 		return nil, errors.New("unexpected query strategy ", config.QueryStrategy)
 	}

-	hosts, err := NewStaticHosts(config.StaticHosts)
-	if err != nil {
-		return nil, errors.New("failed to create hosts").Base(err)
+	var hosts *StaticHosts
+	mphLoaded := false
+	domainMatcherPath := platform.NewEnvFlag(platform.MphCachePath).GetValue(func() string { return "" })
+	if domainMatcherPath != "" {
+		if f, err := os.Open(domainMatcherPath); err == nil {
+			defer f.Close()
+			if m, err := router.LoadGeoSiteMatcher(f, "HOSTS"); err == nil {
+				f.Seek(0, 0)
+				if hostIPs, err := router.LoadGeoSiteHosts(f); err == nil {
+					if sh, err := NewStaticHostsFromCache(m, hostIPs); err == nil {
+						hosts = sh
+						mphLoaded = true
+						errors.LogDebug(ctx, "MphDomainMatcher loaded from cache for DNS hosts, size: ", sh.matchers.Size())
+					}
+				}
+			}
+		}
+	}
+
+	if !mphLoaded {
+		sh, err := NewStaticHosts(config.StaticHosts)
+		if err != nil {
+			return nil, errors.New("failed to create hosts").Base(err)
+		}
+		hosts = sh
 	}

 	var clients []*Client
--- a/app/dns/hosts.go
+++ b/app/dns/hosts.go
@@ -14,7 +14,7 @@ import (
 // StaticHosts represents static domain-ip mapping in DNS server.
 type StaticHosts struct {
 	ips      [][]net.Address
-	matchers *strmatcher.MatcherGroup
+	matchers strmatcher.IndexMatcher
 }

 // NewStaticHosts creates a new StaticHosts instance.
@@ -124,3 +124,50 @@ func (h *StaticHosts) lookup(domain string, option dns.IPOption, maxDepth int) (
 func (h *StaticHosts) Lookup(domain string, option dns.IPOption) ([]net.Address, error) {
 	return h.lookup(domain, option, 5)
 }
+func NewStaticHostsFromCache(matcher strmatcher.IndexMatcher, hostIPs map[string][]string) (*StaticHosts, error) {
+	sh := &StaticHosts{
+		ips:      make([][]net.Address, matcher.Size()+1),
+		matchers: matcher,
+	}
+
+	order := hostIPs["_ORDER"]
+	var offset uint32
+
+	img, ok := matcher.(*strmatcher.IndexMatcherGroup)
+	if !ok {
+		// Single matcher (e.g. only manual or only one geosite)
+		if len(order) > 0 {
+			pattern := order[0]
+			ips := parseIPs(hostIPs[pattern])
+			for i := uint32(1); i <= matcher.Size(); i++ {
+				sh.ips[i] = ips
+			}
+		}
+		return sh, nil
+	}
+
+	for i, m := range img.Matchers {
+		if i < len(order) {
+			pattern := order[i]
+			ips := parseIPs(hostIPs[pattern])
+			for j := uint32(1); j <= m.Size(); j++ {
+				sh.ips[offset+j] = ips
+			}
+			offset += m.Size()
+		}
+	}
+	return sh, nil
+}
+
+func parseIPs(raw []string) []net.Address {
+	addrs := make([]net.Address, 0, len(raw))
+	for _, s := range raw {
+		if len(s) > 1 && s[0] == '#' {
+			rcode, _ := strconv.Atoi(s[1:])
+			addrs = append(addrs, dns.RCodeError(rcode))
+		} else {
+			addrs = append(addrs, net.ParseAddress(s))
+		}
+	}
+	return addrs
+}
--- a/app/dns/hosts_test.go
+++ b/app/dns/hosts_test.go
@@ -1,9 +1,11 @@
 package dns_test

 import (
+	"bytes"
 	"testing"

 	. "github.com/amnezia-vpn/amnezia-xray-core/app/dns"
+	"github.com/amnezia-vpn/amnezia-xray-core/app/router"
 	"github.com/amnezia-vpn/amnezia-xray-core/common"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/net"
 	"github.com/amnezia-vpn/amnezia-xray-core/features/dns"
@@ -130,3 +132,57 @@ func TestStaticHosts(t *testing.T) {
 		}
 	}
 }
+func TestStaticHostsFromCache(t *testing.T) {
+	sites := []*router.GeoSite{
+		{
+			CountryCode: "cloudflare-dns.com",
+			Domain: []*router.Domain{
+				{Type: router.Domain_Full, Value: "example.com"},
+			},
+		},
+		{
+			CountryCode: "geosite:cn",
+			Domain: []*router.Domain{
+				{Type: router.Domain_Domain, Value: "baidu.cn"},
+			},
+		},
+	}
+	deps := map[string][]string{
+		"HOSTS": {"cloudflare-dns.com", "geosite:cn"},
+	}
+	hostIPs := map[string][]string{
+		"cloudflare-dns.com": {"1.1.1.1"},
+		"geosite:cn":         {"2.2.2.2"},
+		"_ORDER":             {"cloudflare-dns.com", "geosite:cn"},
+	}
+
+	var buf bytes.Buffer
+	err := router.SerializeGeoSiteList(sites, deps, hostIPs, &buf)
+	common.Must(err)
+
+	// Load matcher
+	m, err := router.LoadGeoSiteMatcher(bytes.NewReader(buf.Bytes()), "HOSTS")
+	common.Must(err)
+
+	// Load hostIPs
+	f := bytes.NewReader(buf.Bytes())
+	hips, err := router.LoadGeoSiteHosts(f)
+	common.Must(err)
+
+	hosts, err := NewStaticHostsFromCache(m, hips)
+	common.Must(err)
+
+	{
+		ips, _ := hosts.Lookup("example.com", dns.IPOption{IPv4Enable: true})
+		if len(ips) != 1 || ips[0].String() != "1.1.1.1" {
+			t.Error("failed to lookup example.com from cache")
+		}
+	}
+
+	{
+		ips, _ := hosts.Lookup("baidu.cn", dns.IPOption{IPv4Enable: true})
+		if len(ips) != 1 || ips[0].String() != "2.2.2.2" {
+			t.Error("failed to lookup baidu.cn from cache deps")
+		}
+	}
+}
--- a/app/dns/nameserver.go
+++ b/app/dns/nameserver.go
@@ -10,6 +10,8 @@ import (
 	"github.com/amnezia-vpn/amnezia-xray-core/app/router"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/net"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/platform"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/platform/filesystem"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/session"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/strmatcher"
 	"github.com/amnezia-vpn/amnezia-xray-core/core"
@@ -17,6 +19,18 @@ import (
 	"github.com/amnezia-vpn/amnezia-xray-core/features/routing"
 )

+type mphMatcherWrapper struct {
+	m strmatcher.IndexMatcher
+}
+
+func (w *mphMatcherWrapper) Match(s string) bool {
+	return w.m.Match(s) != nil
+}
+
+func (w *mphMatcherWrapper) String() string {
+	return "mph-matcher"
+}
+
 // Server is the interface for Name Server.
 type Server interface {
 	// Name of the Client.
@@ -132,29 +146,50 @@ func NewClient(
 		var rules []string
 		ruleCurr := 0
 		ruleIter := 0
-		for i, domain := range ns.PrioritizedDomain {
-			ns.PrioritizedDomain[i] = nil
-			domainRule, err := toStrMatcher(domain.Type, domain.Domain)
-			if err != nil {
-				errors.LogErrorInner(ctx, err, "failed to create domain matcher, ignore domain rule [type: ", domain.Type, ", domain: ", domain.Domain, "]")
-				domainRule, _ = toStrMatcher(DomainMatchingType_Full, "hack.fix.index.for.illegal.domain.rule")
-			}
-			originalRuleIdx := ruleCurr
-			if ruleCurr < len(ns.OriginalRules) {
-				rule := ns.OriginalRules[ruleCurr]
-				if ruleCurr >= len(rules) {
-					rules = append(rules, rule.Rule)
+
+		// Check if domain matcher cache is provided via environment
+		domainMatcherPath := platform.NewEnvFlag(platform.MphCachePath).GetValue(func() string { return "" })
+		var mphLoaded bool
+
+		if domainMatcherPath != "" && ns.Tag != "" {
+			f, err := filesystem.NewFileReader(domainMatcherPath)
+			if err == nil {
+				defer f.Close()
+				g, err := router.LoadGeoSiteMatcher(f, ns.Tag)
+				if err == nil {
+					errors.LogDebug(ctx, "MphDomainMatcher loaded from cache for ", ns.Tag, " dns tag)")
+					updateDomainRule(&mphMatcherWrapper{m: g}, 0, *matcherInfos)
+					rules = append(rules, "[MPH Cache]")
+					mphLoaded = true
 				}
-				ruleIter++
-				if ruleIter >= int(rule.Size) {
-					ruleIter = 0
+			}
+		}
+
+		if !mphLoaded {
+			for i, domain := range ns.PrioritizedDomain {
+				ns.PrioritizedDomain[i] = nil
+				domainRule, err := toStrMatcher(domain.Type, domain.Domain)
+				if err != nil {
+					errors.LogErrorInner(ctx, err, "failed to create domain matcher, ignore domain rule [type: ", domain.Type, ", domain: ", domain.Domain, "]")
+					domainRule, _ = toStrMatcher(DomainMatchingType_Full, "hack.fix.index.for.illegal.domain.rule")
+				}
+				originalRuleIdx := ruleCurr
+				if ruleCurr < len(ns.OriginalRules) {
+					rule := ns.OriginalRules[ruleCurr]
+					if ruleCurr >= len(rules) {
+						rules = append(rules, rule.Rule)
+					}
+					ruleIter++
+					if ruleIter >= int(rule.Size) {
+						ruleIter = 0
+						ruleCurr++
+					}
+				} else { // No original rule, generate one according to current domain matcher (majorly for compatibility with tests)
+					rules = append(rules, domainRule.String())
 					ruleCurr++
 				}
-			} else { // No original rule, generate one according to current domain matcher (majorly for compatibility with tests)
-				rules = append(rules, domainRule.String())
-				ruleCurr++
+				updateDomainRule(domainRule, originalRuleIdx, *matcherInfos)
 			}
-			updateDomainRule(domainRule, originalRuleIdx, *matcherInfos)
 		}
 		ns.PrioritizedDomain = nil
 		runtime.GC()
--- a/app/dns/nameserver_doh.go
+++ b/app/dns/nameserver_doh.go
@@ -8,7 +8,6 @@ import (
 	"io"
 	"net/http"
 	"net/url"
-	"strings"
 	"time"

 	"github.com/amnezia-vpn/amnezia-xray-core/common"
@@ -19,6 +18,7 @@ import (
 	"github.com/amnezia-vpn/amnezia-xray-core/common/net/cnc"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/protocol/dns"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/session"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/utils"
 	dns_feature "github.com/amnezia-vpn/amnezia-xray-core/features/dns"
 	"github.com/amnezia-vpn/amnezia-xray-core/features/routing"
 	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet"
@@ -214,8 +214,8 @@ func (s *DoHNameServer) dohHTTPSContext(ctx context.Context, b []byte) ([]byte,

 	req.Header.Add("Accept", "application/dns-message")
 	req.Header.Add("Content-Type", "application/dns-message")
-
-	req.Header.Set("X-Padding", strings.Repeat("X", int(crypto.RandBetween(100, 1000))))
+	req.Header.Set("User-Agent", utils.ChromeUA)
+	req.Header.Set("X-Padding", utils.H2Base62Pad(crypto.RandBetween(100, 1000)))

 	hc := s.httpClient

--- a/app/log/command/config_grpc.pb.go
+++ b/app/log/command/config_grpc.pb.go
@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.5.1
-// - protoc             v5.28.2
+// - protoc-gen-go-grpc v1.6.1
+// - protoc             v3.21.12
 // source: app/log/command/config.proto

 package command
@@ -63,7 +63,7 @@ type LoggerServiceServer interface {
 type UnimplementedLoggerServiceServer struct{}

 func (UnimplementedLoggerServiceServer) RestartLogger(context.Context, *RestartLoggerRequest) (*RestartLoggerResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method RestartLogger not implemented")
+	return nil, status.Error(codes.Unimplemented, "method RestartLogger not implemented")
 }
 func (UnimplementedLoggerServiceServer) mustEmbedUnimplementedLoggerServiceServer() {}
 func (UnimplementedLoggerServiceServer) testEmbeddedByValue()                       {}
@@ -76,7 +76,7 @@ type UnsafeLoggerServiceServer interface {
 }

 func RegisterLoggerServiceServer(s grpc.ServiceRegistrar, srv LoggerServiceServer) {
-	// If the following call pancis, it indicates UnimplementedLoggerServiceServer was
+	// If the following call panics, it indicates UnimplementedLoggerServiceServer was
 	// embedded by pointer and is nil.  This will cause panics if an
 	// unimplemented method is ever invoked, so we test this at initialization
 	// time to prevent it from happening at runtime later due to I/O.
--- a/app/observatory/burst/ping.go
+++ b/app/observatory/burst/ping.go
@@ -7,6 +7,7 @@ import (
 	"time"

 	"github.com/amnezia-vpn/amnezia-xray-core/common/net"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/utils"
 	"github.com/amnezia-vpn/amnezia-xray-core/features/routing"
 	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/tagged"
 )
@@ -61,6 +62,7 @@ func (s *pingClient) MeasureDelay(httpMethod string) (time.Duration, error) {
 	if err != nil {
 		return rttFailed, err
 	}
+	req.Header.Set("User-Agent", utils.ChromeUA)

 	start := time.Now()
 	resp, err := s.httpClient.Do(req)
--- a/app/observatory/command/command_grpc.pb.go
+++ b/app/observatory/command/command_grpc.pb.go
@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.5.1
-// - protoc             v5.28.2
+// - protoc-gen-go-grpc v1.6.1
+// - protoc             v3.21.12
 // source: app/observatory/command/command.proto

 package command
@@ -63,7 +63,7 @@ type ObservatoryServiceServer interface {
 type UnimplementedObservatoryServiceServer struct{}

 func (UnimplementedObservatoryServiceServer) GetOutboundStatus(context.Context, *GetOutboundStatusRequest) (*GetOutboundStatusResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetOutboundStatus not implemented")
+	return nil, status.Error(codes.Unimplemented, "method GetOutboundStatus not implemented")
 }
 func (UnimplementedObservatoryServiceServer) mustEmbedUnimplementedObservatoryServiceServer() {}
 func (UnimplementedObservatoryServiceServer) testEmbeddedByValue()                            {}
@@ -76,7 +76,7 @@ type UnsafeObservatoryServiceServer interface {
 }

 func RegisterObservatoryServiceServer(s grpc.ServiceRegistrar, srv ObservatoryServiceServer) {
-	// If the following call pancis, it indicates UnimplementedObservatoryServiceServer was
+	// If the following call panics, it indicates UnimplementedObservatoryServiceServer was
 	// embedded by pointer and is nil.  This will cause panics if an
 	// unimplemented method is ever invoked, so we test this at initialization
 	// time to prevent it from happening at runtime later due to I/O.
--- a/app/observatory/observer.go
+++ b/app/observatory/observer.go
@@ -15,6 +15,7 @@ import (
 	"github.com/amnezia-vpn/amnezia-xray-core/common/session"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/signal/done"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/task"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/utils"
 	"github.com/amnezia-vpn/amnezia-xray-core/core"
 	"github.com/amnezia-vpn/amnezia-xray-core/features/extension"
 	"github.com/amnezia-vpn/amnezia-xray-core/features/outbound"
@@ -162,7 +163,9 @@ func (o *Observer) probe(outbound string) ProbeResult {
 		if o.config.ProbeUrl != "" {
 			probeURL = o.config.ProbeUrl
 		}
-		response, err := httpClient.Get(probeURL)
+		req, _ := http.NewRequest(http.MethodGet, probeURL, nil)
+		req.Header.Set("User-Agent", utils.ChromeUA)
+		response, err := httpClient.Do(req)
 		if err != nil {
 			return errors.New("outbound failed to relay connection").Base(err)
 		}
--- a/app/proxyman/command/command_grpc.pb.go
+++ b/app/proxyman/command/command_grpc.pb.go
@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.5.1
-// - protoc             v5.28.2
+// - protoc-gen-go-grpc v1.6.1
+// - protoc             v3.21.12
 // source: app/proxyman/command/command.proto

 package command
@@ -180,34 +180,34 @@ type HandlerServiceServer interface {
 type UnimplementedHandlerServiceServer struct{}

 func (UnimplementedHandlerServiceServer) AddInbound(context.Context, *AddInboundRequest) (*AddInboundResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method AddInbound not implemented")
+	return nil, status.Error(codes.Unimplemented, "method AddInbound not implemented")
 }
 func (UnimplementedHandlerServiceServer) RemoveInbound(context.Context, *RemoveInboundRequest) (*RemoveInboundResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method RemoveInbound not implemented")
+	return nil, status.Error(codes.Unimplemented, "method RemoveInbound not implemented")
 }
 func (UnimplementedHandlerServiceServer) AlterInbound(context.Context, *AlterInboundRequest) (*AlterInboundResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method AlterInbound not implemented")
+	return nil, status.Error(codes.Unimplemented, "method AlterInbound not implemented")
 }
 func (UnimplementedHandlerServiceServer) ListInbounds(context.Context, *ListInboundsRequest) (*ListInboundsResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method ListInbounds not implemented")
+	return nil, status.Error(codes.Unimplemented, "method ListInbounds not implemented")
 }
 func (UnimplementedHandlerServiceServer) GetInboundUsers(context.Context, *GetInboundUserRequest) (*GetInboundUserResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetInboundUsers not implemented")
+	return nil, status.Error(codes.Unimplemented, "method GetInboundUsers not implemented")
 }
 func (UnimplementedHandlerServiceServer) GetInboundUsersCount(context.Context, *GetInboundUserRequest) (*GetInboundUsersCountResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetInboundUsersCount not implemented")
+	return nil, status.Error(codes.Unimplemented, "method GetInboundUsersCount not implemented")
 }
 func (UnimplementedHandlerServiceServer) AddOutbound(context.Context, *AddOutboundRequest) (*AddOutboundResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method AddOutbound not implemented")
+	return nil, status.Error(codes.Unimplemented, "method AddOutbound not implemented")
 }
 func (UnimplementedHandlerServiceServer) RemoveOutbound(context.Context, *RemoveOutboundRequest) (*RemoveOutboundResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method RemoveOutbound not implemented")
+	return nil, status.Error(codes.Unimplemented, "method RemoveOutbound not implemented")
 }
 func (UnimplementedHandlerServiceServer) AlterOutbound(context.Context, *AlterOutboundRequest) (*AlterOutboundResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method AlterOutbound not implemented")
+	return nil, status.Error(codes.Unimplemented, "method AlterOutbound not implemented")
 }
 func (UnimplementedHandlerServiceServer) ListOutbounds(context.Context, *ListOutboundsRequest) (*ListOutboundsResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method ListOutbounds not implemented")
+	return nil, status.Error(codes.Unimplemented, "method ListOutbounds not implemented")
 }
 func (UnimplementedHandlerServiceServer) mustEmbedUnimplementedHandlerServiceServer() {}
 func (UnimplementedHandlerServiceServer) testEmbeddedByValue()                        {}
@@ -220,7 +220,7 @@ type UnsafeHandlerServiceServer interface {
 }

 func RegisterHandlerServiceServer(s grpc.ServiceRegistrar, srv HandlerServiceServer) {
-	// If the following call pancis, it indicates UnimplementedHandlerServiceServer was
+	// If the following call panics, it indicates UnimplementedHandlerServiceServer was
 	// embedded by pointer and is nil.  This will cause panics if an
 	// unimplemented method is ever invoked, so we test this at initialization
 	// time to prevent it from happening at runtime later due to I/O.
--- a/app/router/command/command_grpc.pb.go
+++ b/app/router/command/command_grpc.pb.go
@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.6.0
-// - protoc             v6.33.2
+// - protoc-gen-go-grpc v1.6.1
+// - protoc             v3.21.12
 // source: app/router/command/command.proto

 package command
--- a/app/router/condition.go
+++ b/app/router/condition.go
@@ -2,6 +2,7 @@ package router

 import (
 	"context"
+	"io"
 	"os"
 	"path/filepath"
 	"regexp"
@@ -52,7 +53,34 @@ var matcherTypeMap = map[Domain_Type]strmatcher.Type{
 }

 type DomainMatcher struct {
-	matchers strmatcher.IndexMatcher
+	Matchers strmatcher.IndexMatcher
+}
+
+func SerializeDomainMatcher(domains []*Domain, w io.Writer) error {
+
+	g := strmatcher.NewMphMatcherGroup()
+	for _, d := range domains {
+		matcherType, f := matcherTypeMap[d.Type]
+		if !f {
+			continue
+		}
+
+		_, err := g.AddPattern(d.Value, matcherType)
+		if err != nil {
+			return err
+		}
+	}
+	g.Build()
+	// serialize
+	return g.Serialize(w)
+}
+
+func NewDomainMatcherFromBuffer(data []byte) (*strmatcher.MphMatcherGroup, error) {
+	matcher, err := strmatcher.NewMphMatcherGroupFromBuffer(data)
+	if err != nil {
+		return nil, err
+	}
+	return matcher, nil
 }

 func NewMphMatcherGroup(domains []*Domain) (*DomainMatcher, error) {
@@ -72,12 +100,12 @@ func NewMphMatcherGroup(domains []*Domain) (*DomainMatcher, error) {
 	}
 	g.Build()
 	return &DomainMatcher{
-		matchers: g,
+		Matchers: g,
 	}, nil
 }

 func (m *DomainMatcher) ApplyDomain(domain string) bool {
-	return len(m.matchers.Match(strings.ToLower(domain))) > 0
+	return len(m.Matchers.Match(strings.ToLower(domain))) > 0
 }

 // Apply implements Condition.
--- a/app/router/condition_serialize_test.go
+++ b/app/router/condition_serialize_test.go
@@ -0,0 +1,167 @@
+package router_test
+
+import (
+	"bytes"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/app/router"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/platform/filesystem"
+	"github.com/stretchr/testify/require"
+)
+
+func TestDomainMatcherSerialization(t *testing.T) {
+
+	domains := []*router.Domain{
+		{Type: router.Domain_Domain, Value: "google.com"},
+		{Type: router.Domain_Domain, Value: "v2ray.com"},
+		{Type: router.Domain_Full, Value: "full.example.com"},
+	}
+
+	var buf bytes.Buffer
+	if err := router.SerializeDomainMatcher(domains, &buf); err != nil {
+		t.Fatalf("Serialize failed: %v", err)
+	}
+
+	matcher, err := router.NewDomainMatcherFromBuffer(buf.Bytes())
+	if err != nil {
+		t.Fatalf("Deserialize failed: %v", err)
+	}
+
+	dMatcher := &router.DomainMatcher{
+		Matchers: matcher,
+	}
+	testCases := []struct {
+		Input string
+		Match bool
+	}{
+		{"google.com", true},
+		{"maps.google.com", true},
+		{"v2ray.com", true},
+		{"full.example.com", true},
+
+		{"example.com", false},
+	}
+
+	for _, tc := range testCases {
+		if res := dMatcher.ApplyDomain(tc.Input); res != tc.Match {
+			t.Errorf("Match(%s) = %v, want %v", tc.Input, res, tc.Match)
+		}
+	}
+}
+
+func TestGeoSiteSerialization(t *testing.T) {
+	sites := []*router.GeoSite{
+		{
+			CountryCode: "CN",
+			Domain: []*router.Domain{
+				{Type: router.Domain_Domain, Value: "baidu.cn"},
+				{Type: router.Domain_Domain, Value: "qq.com"},
+			},
+		},
+		{
+			CountryCode: "US",
+			Domain: []*router.Domain{
+				{Type: router.Domain_Domain, Value: "google.com"},
+				{Type: router.Domain_Domain, Value: "facebook.com"},
+			},
+		},
+	}
+
+	var buf bytes.Buffer
+	if err := router.SerializeGeoSiteList(sites, nil, nil, &buf); err != nil {
+		t.Fatalf("SerializeGeoSiteList failed: %v", err)
+	}
+
+	tmp := t.TempDir()
+	path := filepath.Join(tmp, "matcher.cache")
+
+	f, err := os.Create(path)
+	require.NoError(t, err)
+	_, err = f.Write(buf.Bytes())
+	require.NoError(t, err)
+	f.Close()
+
+	f, err = os.Open(path)
+	require.NoError(t, err)
+	defer f.Close()
+
+	require.NoError(t, err)
+	data, _ := filesystem.ReadFile(path)
+
+	// cn
+	gp, err := router.LoadGeoSiteMatcher(bytes.NewReader(data), "CN")
+	if err != nil {
+		t.Fatalf("LoadGeoSiteMatcher(CN) failed: %v", err)
+	}
+
+	cnMatcher := &router.DomainMatcher{
+		Matchers: gp,
+	}
+
+	if !cnMatcher.ApplyDomain("baidu.cn") {
+		t.Error("CN matcher should match baidu.cn")
+	}
+	if cnMatcher.ApplyDomain("google.com") {
+		t.Error("CN matcher should NOT match google.com")
+	}
+
+	// us
+	gp, err = router.LoadGeoSiteMatcher(bytes.NewReader(data), "US")
+	if err != nil {
+		t.Fatalf("LoadGeoSiteMatcher(US) failed: %v", err)
+	}
+
+	usMatcher := &router.DomainMatcher{
+		Matchers: gp,
+	}
+	if !usMatcher.ApplyDomain("google.com") {
+		t.Error("US matcher should match google.com")
+	}
+	if usMatcher.ApplyDomain("baidu.cn") {
+		t.Error("US matcher should NOT match baidu.cn")
+	}
+
+	// unknown
+	_, err = router.LoadGeoSiteMatcher(bytes.NewReader(data), "unknown")
+	if err == nil {
+		t.Error("LoadGeoSiteMatcher(unknown) should fail")
+	}
+}
+func TestGeoSiteSerializationWithDeps(t *testing.T) {
+	sites := []*router.GeoSite{
+		{
+			CountryCode: "geosite:cn",
+			Domain: []*router.Domain{
+				{Type: router.Domain_Domain, Value: "baidu.cn"},
+			},
+		},
+		{
+			CountryCode: "geosite:google@cn",
+			Domain: []*router.Domain{
+				{Type: router.Domain_Domain, Value: "google.cn"},
+			},
+		},
+		{
+			CountryCode: "rule-1",
+			Domain: []*router.Domain{
+				{Type: router.Domain_Domain, Value: "google.com"},
+			},
+		},
+	}
+	deps := map[string][]string{
+		"rule-1": {"geosite:cn", "geosite:google@cn"},
+	}
+
+	var buf bytes.Buffer
+	err := router.SerializeGeoSiteList(sites, deps, nil, &buf)
+	require.NoError(t, err)
+
+	matcher, err := router.LoadGeoSiteMatcher(bytes.NewReader(buf.Bytes()), "rule-1")
+	require.NoError(t, err)
+
+	require.True(t, matcher.Match("google.com") != nil)
+	require.True(t, matcher.Match("baidu.cn") != nil)
+	require.True(t, matcher.Match("google.cn") != nil)
+}
--- a/app/router/config.go
+++ b/app/router/config.go
@@ -7,6 +7,8 @@ import (
 	"strings"

 	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/platform"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/platform/filesystem"
 	"github.com/amnezia-vpn/amnezia-xray-core/features/outbound"
 	"github.com/amnezia-vpn/amnezia-xray-core/features/routing"
 )
@@ -105,11 +107,25 @@ func (rr *RoutingRule) BuildCondition() (Condition, error) {
 	}

 	if len(rr.Domain) > 0 {
-		matcher, err := NewMphMatcherGroup(rr.Domain)
-		if err != nil {
-			return nil, errors.New("failed to build domain condition with MphDomainMatcher").Base(err)
+		var matcher *DomainMatcher
+		var err error
+		// Check if domain matcher cache is provided via environment
+		domainMatcherPath := platform.NewEnvFlag(platform.MphCachePath).GetValue(func() string { return "" })
+
+		if domainMatcherPath != "" {
+			matcher, err = GetDomainMatcherWithRuleTag(domainMatcherPath, rr.RuleTag)
+			if err != nil {
+				return nil, errors.New("failed to build domain condition from cached MphDomainMatcher").Base(err)
+			}
+			errors.LogDebug(context.Background(), "MphDomainMatcher loaded from cache for ", rr.RuleTag, " rule tag)")
+
+		} else {
+			matcher, err = NewMphMatcherGroup(rr.Domain)
+			if err != nil {
+				return nil, errors.New("failed to build domain condition with MphDomainMatcher").Base(err)
+			}
+			errors.LogDebug(context.Background(), "MphDomainMatcher is enabled for ", len(rr.Domain), " domain rule(s)")
 		}
-		errors.LogDebug(context.Background(), "MphDomainMatcher is enabled for ", len(rr.Domain), " domain rule(s)")
 		conds.Add(matcher)
 		rr.Domain = nil
 		runtime.GC()
@@ -172,3 +188,20 @@ func (br *BalancingRule) Build(ohm outbound.Manager, dispatcher routing.Dispatch
 		return nil, errors.New("unrecognized balancer type")
 	}
 }
+
+func GetDomainMatcherWithRuleTag(domainMatcherPath string, ruleTag string) (*DomainMatcher, error) {
+	f, err := filesystem.NewFileReader(domainMatcherPath)
+	if err != nil {
+		return nil, errors.New("failed to load file: ", domainMatcherPath).Base(err)
+	}
+	defer f.Close()
+
+	g, err := LoadGeoSiteMatcher(f, ruleTag)
+	if err != nil {
+		return nil, errors.New("failed to load file:", domainMatcherPath).Base(err)
+	}
+	return &DomainMatcher{
+		Matchers: g,
+	}, nil
+
+}
--- a/app/router/geosite_compact.go
+++ b/app/router/geosite_compact.go
@@ -0,0 +1,100 @@
+package router
+
+import (
+	"encoding/gob"
+	"errors"
+	"io"
+	"runtime"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common/strmatcher"
+)
+
+type geoSiteListGob struct {
+	Sites map[string][]byte
+	Deps  map[string][]string
+	Hosts map[string][]string
+}
+
+func SerializeGeoSiteList(sites []*GeoSite, deps map[string][]string, hosts map[string][]string, w io.Writer) error {
+	data := geoSiteListGob{
+		Sites: make(map[string][]byte),
+		Deps:  deps,
+		Hosts: hosts,
+	}
+
+	for _, site := range sites {
+		if site == nil {
+			continue
+		}
+		var buf bytesWriter
+		if err := SerializeDomainMatcher(site.Domain, &buf); err != nil {
+			return err
+		}
+		data.Sites[site.CountryCode] = buf.Bytes()
+	}
+
+	return gob.NewEncoder(w).Encode(data)
+}
+
+type bytesWriter struct {
+	data []byte
+}
+
+func (w *bytesWriter) Write(p []byte) (n int, err error) {
+	w.data = append(w.data, p...)
+	return len(p), nil
+}
+
+func (w *bytesWriter) Bytes() []byte {
+	return w.data
+}
+
+func LoadGeoSiteMatcher(r io.Reader, countryCode string) (strmatcher.IndexMatcher, error) {
+	var data geoSiteListGob
+	if err := gob.NewDecoder(r).Decode(&data); err != nil {
+		return nil, err
+	}
+
+	return loadWithDeps(&data, countryCode, make(map[string]bool))
+}
+
+func loadWithDeps(data *geoSiteListGob, code string, visited map[string]bool) (strmatcher.IndexMatcher, error) {
+	if visited[code] {
+		return nil, errors.New("cyclic dependency")
+	}
+	visited[code] = true
+
+	var matchers []strmatcher.IndexMatcher
+
+	if siteData, ok := data.Sites[code]; ok {
+		m, err := NewDomainMatcherFromBuffer(siteData)
+		if err == nil {
+			matchers = append(matchers, m)
+		}
+	}
+
+	if deps, ok := data.Deps[code]; ok {
+		for _, dep := range deps {
+			m, err := loadWithDeps(data, dep, visited)
+			if err == nil {
+				matchers = append(matchers, m)
+			}
+		}
+	}
+
+	if len(matchers) == 0 {
+		return nil, errors.New("matcher not found for: " + code)
+	}
+	if len(matchers) == 1 {
+		return matchers[0], nil
+	}
+	runtime.GC()
+	return &strmatcher.IndexMatcherGroup{Matchers: matchers}, nil
+}
+func LoadGeoSiteHosts(r io.Reader) (map[string][]string, error) {
+	var data geoSiteListGob
+	if err := gob.NewDecoder(r).Decode(&data); err != nil {
+		return nil, err
+	}
+	return data.Hosts, nil
+}
--- a/app/stats/command/command_grpc.pb.go
+++ b/app/stats/command/command_grpc.pb.go
@@ -1,8 +1,8 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.5.1
-// - protoc             v6.32.0
-// source: command.proto
+// - protoc-gen-go-grpc v1.6.1
+// - protoc             v3.21.12
+// source: app/stats/command/command.proto

 package command

@@ -128,22 +128,22 @@ type StatsServiceServer interface {
 type UnimplementedStatsServiceServer struct{}

 func (UnimplementedStatsServiceServer) GetStats(context.Context, *GetStatsRequest) (*GetStatsResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetStats not implemented")
+	return nil, status.Error(codes.Unimplemented, "method GetStats not implemented")
 }
 func (UnimplementedStatsServiceServer) GetStatsOnline(context.Context, *GetStatsRequest) (*GetStatsResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetStatsOnline not implemented")
+	return nil, status.Error(codes.Unimplemented, "method GetStatsOnline not implemented")
 }
 func (UnimplementedStatsServiceServer) QueryStats(context.Context, *QueryStatsRequest) (*QueryStatsResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method QueryStats not implemented")
+	return nil, status.Error(codes.Unimplemented, "method QueryStats not implemented")
 }
 func (UnimplementedStatsServiceServer) GetSysStats(context.Context, *SysStatsRequest) (*SysStatsResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetSysStats not implemented")
+	return nil, status.Error(codes.Unimplemented, "method GetSysStats not implemented")
 }
 func (UnimplementedStatsServiceServer) GetStatsOnlineIpList(context.Context, *GetStatsRequest) (*GetStatsOnlineIpListResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetStatsOnlineIpList not implemented")
+	return nil, status.Error(codes.Unimplemented, "method GetStatsOnlineIpList not implemented")
 }
 func (UnimplementedStatsServiceServer) GetAllOnlineUsers(context.Context, *GetAllOnlineUsersRequest) (*GetAllOnlineUsersResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetAllOnlineUsers not implemented")
+	return nil, status.Error(codes.Unimplemented, "method GetAllOnlineUsers not implemented")
 }
 func (UnimplementedStatsServiceServer) mustEmbedUnimplementedStatsServiceServer() {}
 func (UnimplementedStatsServiceServer) testEmbeddedByValue()                      {}
@@ -156,7 +156,7 @@ type UnsafeStatsServiceServer interface {
 }

 func RegisterStatsServiceServer(s grpc.ServiceRegistrar, srv StatsServiceServer) {
-	// If the following call pancis, it indicates UnimplementedStatsServiceServer was
+	// If the following call panics, it indicates UnimplementedStatsServiceServer was
 	// embedded by pointer and is nil.  This will cause panics if an
 	// unimplemented method is ever invoked, so we test this at initialization
 	// time to prevent it from happening at runtime later due to I/O.
@@ -307,5 +307,5 @@ var StatsService_ServiceDesc = grpc.ServiceDesc{
 		},
 	},
 	Streams:  []grpc.StreamDesc{},
-	Metadata: "command.proto",
+	Metadata: "app/stats/command/command.proto",
 }
--- a/common/platform/platform.go
+++ b/common/platform/platform.go
@@ -24,6 +24,8 @@ const (
 	XUDPBaseKey          = "xray.xudp.basekey"

 	TunFdKey = "xray.tun.fd"
+
+	MphCachePath = "xray.mph.cache"
 )

 type EnvFlag struct {
--- a/common/strmatcher/ac_automaton_matcher.go
+++ b/common/strmatcher/ac_automaton_matcher.go
@@ -7,8 +7,8 @@ import (
 const validCharCount = 53

 type MatchType struct {
-	matchType Type
-	exist     bool
+	Type  Type
+	Exist bool
 }

 const (
@@ -17,23 +17,23 @@ const (
 )

 type Edge struct {
-	edgeType bool
-	nextNode int
+	Type     bool
+	NextNode int
 }

 type ACAutomaton struct {
-	trie   [][validCharCount]Edge
-	fail   []int
-	exists []MatchType
-	count  int
+	Trie   [][validCharCount]Edge
+	Fail   []int
+	Exists []MatchType
+	Count  int
 }

 func newNode() [validCharCount]Edge {
 	var s [validCharCount]Edge
 	for i := range s {
 		s[i] = Edge{
-			edgeType: FailEdge,
-			nextNode: 0,
+			Type:     FailEdge,
+			NextNode: 0,
 		}
 	}
 	return s
@@ -123,11 +123,11 @@ var char2Index = []int{

 func NewACAutomaton() *ACAutomaton {
 	ac := new(ACAutomaton)
-	ac.trie = append(ac.trie, newNode())
-	ac.fail = append(ac.fail, 0)
-	ac.exists = append(ac.exists, MatchType{
-		matchType: Full,
-		exist:     false,
+	ac.Trie = append(ac.Trie, newNode())
+	ac.Fail = append(ac.Fail, 0)
+	ac.Exists = append(ac.Exists, MatchType{
+		Type:  Full,
+		Exist: false,
 	})
 	return ac
 }
@@ -136,53 +136,53 @@ func (ac *ACAutomaton) Add(domain string, t Type) {
 	node := 0
 	for i := len(domain) - 1; i >= 0; i-- {
 		idx := char2Index[domain[i]]
-		if ac.trie[node][idx].nextNode == 0 {
-			ac.count++
-			if len(ac.trie) < ac.count+1 {
-				ac.trie = append(ac.trie, newNode())
-				ac.fail = append(ac.fail, 0)
-				ac.exists = append(ac.exists, MatchType{
-					matchType: Full,
-					exist:     false,
+		if ac.Trie[node][idx].NextNode == 0 {
+			ac.Count++
+			if len(ac.Trie) < ac.Count+1 {
+				ac.Trie = append(ac.Trie, newNode())
+				ac.Fail = append(ac.Fail, 0)
+				ac.Exists = append(ac.Exists, MatchType{
+					Type:  Full,
+					Exist: false,
 				})
 			}
-			ac.trie[node][idx] = Edge{
-				edgeType: TrieEdge,
-				nextNode: ac.count,
+			ac.Trie[node][idx] = Edge{
+				Type:     TrieEdge,
+				NextNode: ac.Count,
 			}
 		}
-		node = ac.trie[node][idx].nextNode
+		node = ac.Trie[node][idx].NextNode
 	}
-	ac.exists[node] = MatchType{
-		matchType: t,
-		exist:     true,
+	ac.Exists[node] = MatchType{
+		Type:  t,
+		Exist: true,
 	}
 	switch t {
 	case Domain:
-		ac.exists[node] = MatchType{
-			matchType: Full,
-			exist:     true,
+		ac.Exists[node] = MatchType{
+			Type:  Full,
+			Exist: true,
 		}
 		idx := char2Index['.']
-		if ac.trie[node][idx].nextNode == 0 {
-			ac.count++
-			if len(ac.trie) < ac.count+1 {
-				ac.trie = append(ac.trie, newNode())
-				ac.fail = append(ac.fail, 0)
-				ac.exists = append(ac.exists, MatchType{
-					matchType: Full,
-					exist:     false,
+		if ac.Trie[node][idx].NextNode == 0 {
+			ac.Count++
+			if len(ac.Trie) < ac.Count+1 {
+				ac.Trie = append(ac.Trie, newNode())
+				ac.Fail = append(ac.Fail, 0)
+				ac.Exists = append(ac.Exists, MatchType{
+					Type:  Full,
+					Exist: false,
 				})
 			}
-			ac.trie[node][idx] = Edge{
-				edgeType: TrieEdge,
-				nextNode: ac.count,
+			ac.Trie[node][idx] = Edge{
+				Type:     TrieEdge,
+				NextNode: ac.Count,
 			}
 		}
-		node = ac.trie[node][idx].nextNode
-		ac.exists[node] = MatchType{
-			matchType: t,
-			exist:     true,
+		node = ac.Trie[node][idx].NextNode
+		ac.Exists[node] = MatchType{
+			Type:  t,
+			Exist: true,
 		}
 	default:
 		break
@@ -192,8 +192,8 @@ func (ac *ACAutomaton) Add(domain string, t Type) {
 func (ac *ACAutomaton) Build() {
 	queue := list.New()
 	for i := 0; i < validCharCount; i++ {
-		if ac.trie[0][i].nextNode != 0 {
-			queue.PushBack(ac.trie[0][i])
+		if ac.Trie[0][i].NextNode != 0 {
+			queue.PushBack(ac.Trie[0][i])
 		}
 	}
 	for {
@@ -201,16 +201,16 @@ func (ac *ACAutomaton) Build() {
 		if front == nil {
 			break
 		} else {
-			node := front.Value.(Edge).nextNode
+			node := front.Value.(Edge).NextNode
 			queue.Remove(front)
 			for i := 0; i < validCharCount; i++ {
-				if ac.trie[node][i].nextNode != 0 {
-					ac.fail[ac.trie[node][i].nextNode] = ac.trie[ac.fail[node]][i].nextNode
-					queue.PushBack(ac.trie[node][i])
+				if ac.Trie[node][i].NextNode != 0 {
+					ac.Fail[ac.Trie[node][i].NextNode] = ac.Trie[ac.Fail[node]][i].NextNode
+					queue.PushBack(ac.Trie[node][i])
 				} else {
-					ac.trie[node][i] = Edge{
-						edgeType: FailEdge,
-						nextNode: ac.trie[ac.fail[node]][i].nextNode,
+					ac.Trie[node][i] = Edge{
+						Type:     FailEdge,
+						NextNode: ac.Trie[ac.Fail[node]][i].NextNode,
 					}
 				}
 			}
@@ -230,9 +230,9 @@ func (ac *ACAutomaton) Match(s string) bool {
 			return false
 		}
 		idx := char2Index[chr]
-		fullMatch = fullMatch && ac.trie[node][idx].edgeType
-		node = ac.trie[node][idx].nextNode
-		switch ac.exists[node].matchType {
+		fullMatch = fullMatch && ac.Trie[node][idx].Type
+		node = ac.Trie[node][idx].NextNode
+		switch ac.Exists[node].Type {
 		case Substr:
 			return true
 		case Domain:
@@ -243,5 +243,5 @@ func (ac *ACAutomaton) Match(s string) bool {
 			break
 		}
 	}
-	return fullMatch && ac.exists[node].exist
+	return fullMatch && ac.Exists[node].Exist
 }
--- a/common/strmatcher/matchers.go
+++ b/common/strmatcher/matchers.go
@@ -39,14 +39,18 @@ func (m domainMatcher) String() string {
 	return "domain:" + string(m)
 }

-type regexMatcher struct {
-	pattern *regexp.Regexp
+type RegexMatcher struct {
+	Pattern string
+	reg     *regexp.Regexp
 }

-func (m *regexMatcher) Match(s string) bool {
-	return m.pattern.MatchString(s)
+func (m *RegexMatcher) Match(s string) bool {
+	if m.reg == nil {
+		m.reg = regexp.MustCompile(m.Pattern)
+	}
+	return m.reg.MatchString(s)
 }

-func (m *regexMatcher) String() string {
-	return "regexp:" + m.pattern.String()
+func (m *RegexMatcher) String() string {
+	return "regexp:" + m.Pattern
 }
--- a/common/strmatcher/mph_matcher.go
+++ b/common/strmatcher/mph_matcher.go
@@ -25,40 +25,40 @@ func RollingHash(s string) uint32 {
 // 2. `substr` patterns are matched by ac automaton;
 // 3. `regex` patterns are matched with the regex library.
 type MphMatcherGroup struct {
-	ac            *ACAutomaton
-	otherMatchers []matcherEntry
-	rules         []string
-	level0        []uint32
-	level0Mask    int
-	level1        []uint32
-	level1Mask    int
-	count         uint32
-	ruleMap       *map[string]uint32
+	Ac            *ACAutomaton
+	OtherMatchers []MatcherEntry
+	Rules         []string
+	Level0        []uint32
+	Level0Mask    int
+	Level1        []uint32
+	Level1Mask    int
+	Count         uint32
+	RuleMap       *map[string]uint32
 }

 func (g *MphMatcherGroup) AddFullOrDomainPattern(pattern string, t Type) {
 	h := RollingHash(pattern)
 	switch t {
 	case Domain:
-		(*g.ruleMap)["."+pattern] = h*PrimeRK + uint32('.')
+		(*g.RuleMap)["."+pattern] = h*PrimeRK + uint32('.')
 		fallthrough
 	case Full:
-		(*g.ruleMap)[pattern] = h
+		(*g.RuleMap)[pattern] = h
 	default:
 	}
 }

 func NewMphMatcherGroup() *MphMatcherGroup {
 	return &MphMatcherGroup{
-		ac:            nil,
-		otherMatchers: nil,
-		rules:         nil,
-		level0:        nil,
-		level0Mask:    0,
-		level1:        nil,
-		level1Mask:    0,
-		count:         1,
-		ruleMap:       &map[string]uint32{},
+		Ac:            nil,
+		OtherMatchers: nil,
+		Rules:         nil,
+		Level0:        nil,
+		Level0Mask:    0,
+		Level1:        nil,
+		Level1Mask:    0,
+		Count:         1,
+		RuleMap:       &map[string]uint32{},
 	}
 }

@@ -66,10 +66,10 @@ func NewMphMatcherGroup() *MphMatcherGroup {
 func (g *MphMatcherGroup) AddPattern(pattern string, t Type) (uint32, error) {
 	switch t {
 	case Substr:
-		if g.ac == nil {
-			g.ac = NewACAutomaton()
+		if g.Ac == nil {
+			g.Ac = NewACAutomaton()
 		}
-		g.ac.Add(pattern, t)
+		g.Ac.Add(pattern, t)
 	case Full, Domain:
 		pattern = strings.ToLower(pattern)
 		g.AddFullOrDomainPattern(pattern, t)
@@ -78,39 +78,39 @@ func (g *MphMatcherGroup) AddPattern(pattern string, t Type) (uint32, error) {
 		if err != nil {
 			return 0, err
 		}
-		g.otherMatchers = append(g.otherMatchers, matcherEntry{
-			m:  &regexMatcher{pattern: r},
-			id: g.count,
+		g.OtherMatchers = append(g.OtherMatchers, MatcherEntry{
+			M:  &RegexMatcher{Pattern: pattern, reg: r},
+			Id: g.Count,
 		})
 	default:
 		panic("Unknown type")
 	}
-	return g.count, nil
+	return g.Count, nil
 }

 // Build builds a minimal perfect hash table and ac automaton from insert rules
 func (g *MphMatcherGroup) Build() {
-	if g.ac != nil {
-		g.ac.Build()
+	if g.Ac != nil {
+		g.Ac.Build()
 	}
-	keyLen := len(*g.ruleMap)
+	keyLen := len(*g.RuleMap)
 	if keyLen == 0 {
 		keyLen = 1
-		(*g.ruleMap)["empty___"] = RollingHash("empty___")
+		(*g.RuleMap)["empty___"] = RollingHash("empty___")
 	}
-	g.level0 = make([]uint32, nextPow2(keyLen/4))
-	g.level0Mask = len(g.level0) - 1
-	g.level1 = make([]uint32, nextPow2(keyLen))
-	g.level1Mask = len(g.level1) - 1
-	sparseBuckets := make([][]int, len(g.level0))
+	g.Level0 = make([]uint32, nextPow2(keyLen/4))
+	g.Level0Mask = len(g.Level0) - 1
+	g.Level1 = make([]uint32, nextPow2(keyLen))
+	g.Level1Mask = len(g.Level1) - 1
+	sparseBuckets := make([][]int, len(g.Level0))
 	var ruleIdx int
-	for rule, hash := range *g.ruleMap {
-		n := int(hash) & g.level0Mask
-		g.rules = append(g.rules, rule)
+	for rule, hash := range *g.RuleMap {
+		n := int(hash) & g.Level0Mask
+		g.Rules = append(g.Rules, rule)
 		sparseBuckets[n] = append(sparseBuckets[n], ruleIdx)
 		ruleIdx++
 	}
-	g.ruleMap = nil
+	g.RuleMap = nil
 	var buckets []indexBucket
 	for n, vals := range sparseBuckets {
 		if len(vals) > 0 {
@@ -119,7 +119,7 @@ func (g *MphMatcherGroup) Build() {
 	}
 	sort.Sort(bySize(buckets))

-	occ := make([]bool, len(g.level1))
+	occ := make([]bool, len(g.Level1))
 	var tmpOcc []int
 	for _, bucket := range buckets {
 		seed := uint32(0)
@@ -127,7 +127,7 @@ func (g *MphMatcherGroup) Build() {
 			findSeed := true
 			tmpOcc = tmpOcc[:0]
 			for _, i := range bucket.vals {
-				n := int(strhashFallback(unsafe.Pointer(&g.rules[i]), uintptr(seed))) & g.level1Mask
+				n := int(strhashFallback(unsafe.Pointer(&g.Rules[i]), uintptr(seed))) & g.Level1Mask
 				if occ[n] {
 					for _, n := range tmpOcc {
 						occ[n] = false
@@ -138,10 +138,10 @@ func (g *MphMatcherGroup) Build() {
 				}
 				occ[n] = true
 				tmpOcc = append(tmpOcc, n)
-				g.level1[n] = uint32(i)
+				g.Level1[n] = uint32(i)
 			}
 			if findSeed {
-				g.level0[bucket.n] = seed
+				g.Level0[bucket.n] = seed
 				break
 			}
 		}
@@ -159,11 +159,11 @@ func nextPow2(v int) int {

 // Lookup searches for s in t and returns its index and whether it was found.
 func (g *MphMatcherGroup) Lookup(h uint32, s string) bool {
-	i0 := int(h) & g.level0Mask
-	seed := g.level0[i0]
-	i1 := int(strhashFallback(unsafe.Pointer(&s), uintptr(seed))) & g.level1Mask
-	n := g.level1[i1]
-	return s == g.rules[int(n)]
+	i0 := int(h) & g.Level0Mask
+	seed := g.Level0[i0]
+	i1 := int(strhashFallback(unsafe.Pointer(&s), uintptr(seed))) & g.Level1Mask
+	n := g.Level1[i1]
+	return s == g.Rules[int(n)]
 }

 // Match implements IndexMatcher.Match.
@@ -183,13 +183,13 @@ func (g *MphMatcherGroup) Match(pattern string) []uint32 {
 		result = append(result, 1)
 		return result
 	}
-	if g.ac != nil && g.ac.Match(pattern) {
+	if g.Ac != nil && g.Ac.Match(pattern) {
 		result = append(result, 1)
 		return result
 	}
-	for _, e := range g.otherMatchers {
-		if e.m.Match(pattern) {
-			result = append(result, e.id)
+	for _, e := range g.OtherMatchers {
+		if e.M.Match(pattern) {
+			result = append(result, e.Id)
 			return result
 		}
 	}
@@ -302,3 +302,7 @@ func readUnaligned64(p unsafe.Pointer) uint64 {
 	q := (*[8]byte)(p)
 	return uint64(q[0]) | uint64(q[1])<<8 | uint64(q[2])<<16 | uint64(q[3])<<24 | uint64(q[4])<<32 | uint64(q[5])<<40 | uint64(q[6])<<48 | uint64(q[7])<<56
 }
+
+func (g *MphMatcherGroup) Size() uint32 {
+	return g.Count
+}
--- a/common/strmatcher/mph_matcher_compact.go
+++ b/common/strmatcher/mph_matcher_compact.go
@@ -0,0 +1,47 @@
+package strmatcher
+
+import (
+	"bytes"
+	"encoding/gob"
+	"io"
+)
+
+func init() {
+	gob.Register(&RegexMatcher{})
+	gob.Register(fullMatcher(""))
+	gob.Register(substrMatcher(""))
+	gob.Register(domainMatcher(""))
+}
+
+func (g *MphMatcherGroup) Serialize(w io.Writer) error {
+	data := MphMatcherGroup{
+		Ac:            g.Ac,
+		OtherMatchers: g.OtherMatchers,
+		Rules:         g.Rules,
+		Level0:        g.Level0,
+		Level0Mask:    g.Level0Mask,
+		Level1:        g.Level1,
+		Level1Mask:    g.Level1Mask,
+		Count:         g.Count,
+	}
+	return gob.NewEncoder(w).Encode(data)
+}
+
+func NewMphMatcherGroupFromBuffer(data []byte) (*MphMatcherGroup, error) {
+	var gData MphMatcherGroup
+	if err := gob.NewDecoder(bytes.NewReader(data)).Decode(&gData); err != nil {
+		return nil, err
+	}
+
+	g := NewMphMatcherGroup()
+	g.Ac = gData.Ac
+	g.OtherMatchers = gData.OtherMatchers
+	g.Rules = gData.Rules
+	g.Level0 = gData.Level0
+	g.Level0Mask = gData.Level0Mask
+	g.Level1 = gData.Level1
+	g.Level1Mask = gData.Level1Mask
+	g.Count = gData.Count
+
+	return g, nil
+}
--- a/common/strmatcher/strmatcher.go
+++ b/common/strmatcher/strmatcher.go
@@ -41,8 +41,9 @@ func (t Type) New(pattern string) (Matcher, error) {
 		if err != nil {
 			return nil, err
 		}
-		return &regexMatcher{
-			pattern: r,
+		return &RegexMatcher{
+			Pattern: pattern,
+			reg:     r,
 		}, nil
 	default:
 		return nil, errors.New("unk type")
@@ -53,11 +54,13 @@ func (t Type) New(pattern string) (Matcher, error) {
 type IndexMatcher interface {
 	// Match returns the index of a matcher that matches the input. It returns empty array if no such matcher exists.
 	Match(input string) []uint32
+	// Size returns the number of matchers in the group.
+	Size() uint32
 }

-type matcherEntry struct {
-	m  Matcher
-	id uint32
+type MatcherEntry struct {
+	M  Matcher
+	Id uint32
 }

 // MatcherGroup is an implementation of IndexMatcher.
@@ -66,7 +69,7 @@ type MatcherGroup struct {
 	count         uint32
 	fullMatcher   FullMatcherGroup
 	domainMatcher DomainMatcherGroup
-	otherMatchers []matcherEntry
+	otherMatchers []MatcherEntry
 }

 // Add adds a new Matcher into the MatcherGroup, and returns its index. The index will never be 0.
@@ -80,9 +83,9 @@ func (g *MatcherGroup) Add(m Matcher) uint32 {
 	case domainMatcher:
 		g.domainMatcher.addMatcher(tm, c)
 	default:
-		g.otherMatchers = append(g.otherMatchers, matcherEntry{
-			m:  m,
-			id: c,
+		g.otherMatchers = append(g.otherMatchers, MatcherEntry{
+			M:  m,
+			Id: c,
 		})
 	}

@@ -95,8 +98,8 @@ func (g *MatcherGroup) Match(pattern string) []uint32 {
 	result = append(result, g.fullMatcher.Match(pattern)...)
 	result = append(result, g.domainMatcher.Match(pattern)...)
 	for _, e := range g.otherMatchers {
-		if e.m.Match(pattern) {
-			result = append(result, e.id)
+		if e.M.Match(pattern) {
+			result = append(result, e.Id)
 		}
 	}
 	return result
@@ -106,3 +109,33 @@ func (g *MatcherGroup) Match(pattern string) []uint32 {
 func (g *MatcherGroup) Size() uint32 {
 	return g.count
 }
+
+type IndexMatcherGroup struct {
+	Matchers []IndexMatcher
+}
+
+func (g *IndexMatcherGroup) Match(input string) []uint32 {
+	var offset uint32
+	for _, m := range g.Matchers {
+		if res := m.Match(input); len(res) > 0 {
+			if offset == 0 {
+				return res
+			}
+			shifted := make([]uint32, len(res))
+			for i, id := range res {
+				shifted[i] = id + offset
+			}
+			return shifted
+		}
+		offset += m.Size()
+	}
+	return nil
+}
+
+func (g *IndexMatcherGroup) Size() uint32 {
+	var count uint32
+	for _, m := range g.Matchers {
+		count += m.Size()
+	}
+	return count
+}
--- a/common/utils/access_field.go
+++ b/common/utils/access_field.go
@@ -0,0 +1,17 @@
+package utils
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+// AccessField can used to access unexported field of a struct
+// valueType must be the exact type of the field or it will panic
+func AccessField[valueType any](obj any, fieldName string) *valueType {
+	field := reflect.ValueOf(obj).Elem().FieldByName(fieldName)
+	if field.Type() != reflect.TypeOf(*new(valueType)) {
+		panic("field type: " + field.Type().String() + ", valueType: " + reflect.TypeOf(*new(valueType)).String())
+	}
+	v := (*valueType)(unsafe.Pointer(field.UnsafeAddr()))
+	return v
+}
--- a/common/utils/browser.go
+++ b/common/utils/browser.go
@@ -0,0 +1,28 @@
+package utils
+
+import (
+	"math/rand"
+	"strconv"
+	"time"
+
+	"github.com/klauspost/cpuid/v2"
+)
+
+func ChromeVersion() int {
+	// Use only CPU info as seed for PRNG
+	seed := int64(cpuid.CPU.Family + cpuid.CPU.Model + cpuid.CPU.PhysicalCores + cpuid.CPU.LogicalCores + cpuid.CPU.CacheLine)
+	rng := rand.New(rand.NewSource(seed))
+	// Start from Chrome 144 released on 2026.1.13
+	releaseDate := time.Date(2026, 1, 13, 0, 0, 0, 0, time.UTC)
+	version := 144
+	now := time.Now()
+	// Each version has random 25-45 day interval
+	for releaseDate.Before(now) {
+		releaseDate = releaseDate.AddDate(0, 0, rng.Intn(21)+25)
+		version++
+	}
+	return version - 1
+}
+
+// ChromeUA provides default browser User-Agent based on CPU-seeded PRNG.
+var ChromeUA = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/" + strconv.Itoa(ChromeVersion()) + ".0.0.0 Safari/537.36"
--- a/common/utils/padding.go
+++ b/common/utils/padding.go
@@ -0,0 +1,24 @@
+package utils
+
+import (
+	"math/rand/v2"
+)
+
+var (
+	// 8 ÷ (397/62)
+	h2packCorrectionFactor = 1.2493702770780857
+	base62TotalCharsNum    = 62
+	base62Chars            = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
+)
+
+// H2Base62Pad generates a base62 padding string for HTTP/2 header
+// The total len will be slightly longer than the input to match the length after h2(h3 also) header huffman encoding
+func H2Base62Pad[T int32 | int64 | int](expectedLen T) string {
+	actualLenFloat := float64(expectedLen) * h2packCorrectionFactor
+	actualLen := int(actualLenFloat)
+	result := make([]byte, actualLen)
+	for i := range actualLen {
+		result[i] = base62Chars[rand.N(base62TotalCharsNum)]
+	}
+	return string(result)
+}
--- a/core/core.go
+++ b/core/core.go
@@ -18,8 +18,8 @@ import (

 var (
 	Version_x byte = 26
-	Version_y byte = 1
-	Version_z byte = 23
+	Version_y byte = 2
+	Version_z byte = 6
 )

 var (
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/amnezia-vpn/amnezia-xray-core

-go 1.25.6
+go 1.25.7

 require (
 	github.com/apernet/quic-go v0.57.2-0.20260111184307-eec823306178
@@ -9,6 +9,7 @@ require (
 	github.com/golang/mock v1.7.0-rc.1
 	github.com/google/go-cmp v0.7.0
 	github.com/gorilla/websocket v1.5.3
+	github.com/klauspost/cpuid/v2 v2.0.12
 	github.com/miekg/dns v1.1.72
 	github.com/pelletier/go-toml v1.9.5
 	github.com/pires/go-proxyproto v0.9.2
@@ -39,7 +40,6 @@ require (
 	github.com/google/btree v1.1.2 // indirect
 	github.com/juju/ratelimit v1.0.2 // indirect
 	github.com/klauspost/compress v1.17.4 // indirect
-	github.com/klauspost/cpuid/v2 v2.0.12 // indirect
 	github.com/kr/text v0.2.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/quic-go/qpack v0.6.0 // indirect
--- a/infra/conf/router.go
+++ b/infra/conf/router.go
@@ -12,6 +12,7 @@ import (
 	"github.com/amnezia-vpn/amnezia-xray-core/app/router"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/net"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/platform"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/platform/filesystem"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/serial"
 	"google.golang.org/protobuf/proto"
@@ -204,6 +205,13 @@ func loadIP(file, code string) ([]*router.CIDR, error) {
 }

 func loadSite(file, code string) ([]*router.Domain, error) {
+
+	// Check if domain matcher cache is provided via environment
+	domainMatcherPath := platform.NewEnvFlag(platform.MphCachePath).GetValue(func() string { return "" })
+	if domainMatcherPath != "" {
+		return []*router.Domain{{}}, nil
+	}
+
 	bs, err := loadFile(file, code)
 	if err != nil {
 		return nil, err
--- a/infra/conf/transport_authenticators.go
+++ b/infra/conf/transport_authenticators.go
@@ -4,72 +4,18 @@ import (
 	"sort"

 	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
-	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/headers/dns"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/utils"
 	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/headers/http"
 	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/headers/noop"
-	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/headers/srtp"
-	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/headers/tls"
-	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/headers/utp"
-	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/headers/wechat"
-	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/headers/wireguard"
 	"google.golang.org/protobuf/proto"
 )

-type NoOpAuthenticator struct{}
-
-func (NoOpAuthenticator) Build() (proto.Message, error) {
-	return new(noop.Config), nil
-}
-
 type NoOpConnectionAuthenticator struct{}

 func (NoOpConnectionAuthenticator) Build() (proto.Message, error) {
 	return new(noop.ConnectionConfig), nil
 }

-type SRTPAuthenticator struct{}
-
-func (SRTPAuthenticator) Build() (proto.Message, error) {
-	return new(srtp.Config), nil
-}
-
-type UTPAuthenticator struct{}
-
-func (UTPAuthenticator) Build() (proto.Message, error) {
-	return new(utp.Config), nil
-}
-
-type WechatVideoAuthenticator struct{}
-
-func (WechatVideoAuthenticator) Build() (proto.Message, error) {
-	return new(wechat.VideoConfig), nil
-}
-
-type WireguardAuthenticator struct{}
-
-func (WireguardAuthenticator) Build() (proto.Message, error) {
-	return new(wireguard.WireguardConfig), nil
-}
-
-type DNSAuthenticator struct {
-	Domain string `json:"domain"`
-}
-
-func (v *DNSAuthenticator) Build() (proto.Message, error) {
-	config := new(dns.Config)
-	config.Domain = "www.baidu.com"
-	if len(v.Domain) > 0 {
-		config.Domain = v.Domain
-	}
-	return config, nil
-}
-
-type DTLSAuthenticator struct{}
-
-func (DTLSAuthenticator) Build() (proto.Message, error) {
-	return new(tls.PacketConfig), nil
-}
-
 type AuthenticatorRequest struct {
 	Version string                 `json:"version"`
 	Method  string                 `json:"method"`
@@ -95,11 +41,8 @@ func (v *AuthenticatorRequest) Build() (*http.RequestConfig, error) {
 				Value: []string{"www.baidu.com", "www.bing.com"},
 			},
 			{
-				Name: "User-Agent",
-				Value: []string{
-					"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36",
-					"Mozilla/5.0 (iPhone; CPU iPhone OS 10_0_2 like Mac OS X) AppleWebKit/601.1 (KHTML, like Gecko) CriOS/53.0.2785.109 Mobile/14A456 Safari/601.1.46",
-				},
+				Name:  "User-Agent",
+				Value: []string{utils.ChromeUA},
 			},
 			{
 				Name:  "Accept-Encoding",
--- a/infra/conf/transport_internet.go
+++ b/infra/conf/transport_internet.go
@@ -1,6 +1,7 @@
 package conf

 import (
+	"context"
 	"encoding/base64"
 	"encoding/hex"
 	"encoding/json"
@@ -10,13 +11,24 @@ import (
 	"strconv"
 	"strings"
 	"syscall"
+	"time"

 	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/net"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/platform/filesystem"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/serial"
 	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/dns"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/dtls"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/srtp"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/utp"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/wechat"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/wireguard"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/mkcp/aes128gcm"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/mkcp/original"
 	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/salamander"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/xdns"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/xicmp"
 	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/httpupgrade"
 	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/hysteria"
 	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/kcp"
@@ -29,16 +41,6 @@ import (
 )

 var (
-	kcpHeaderLoader = NewJSONConfigLoader(ConfigCreatorCache{
-		"none":         func() interface{} { return new(NoOpAuthenticator) },
-		"srtp":         func() interface{} { return new(SRTPAuthenticator) },
-		"utp":          func() interface{} { return new(UTPAuthenticator) },
-		"wechat-video": func() interface{} { return new(WechatVideoAuthenticator) },
-		"dtls":         func() interface{} { return new(DTLSAuthenticator) },
-		"wireguard":    func() interface{} { return new(WireguardAuthenticator) },
-		"dns":          func() interface{} { return new(DNSAuthenticator) },
-	}, "type", "")
-
 	tcpHeaderLoader = NewJSONConfigLoader(ConfigCreatorCache{
 		"none": func() interface{} { return new(NoOpConnectionAuthenticator) },
 		"http": func() interface{} { return new(Authenticator) },
@@ -63,9 +65,9 @@ func (c *KCPConfig) Build() (proto.Message, error) {

 	if c.Mtu != nil {
 		mtu := *c.Mtu
-		if mtu < 576 || mtu > 1460 {
-			return nil, errors.New("invalid mKCP MTU size: ", mtu).AtError()
-		}
+		// if mtu < 576 || mtu > 1460 {
+		// 	return nil, errors.New("invalid mKCP MTU size: ", mtu).AtError()
+		// }
 		config.Mtu = &kcp.MTU{Value: mtu}
 	}
 	if c.Tti != nil {
@@ -100,20 +102,8 @@ func (c *KCPConfig) Build() (proto.Message, error) {
 			config.WriteBuffer = &kcp.WriteBuffer{Size: 512 * 1024}
 		}
 	}
-	if len(c.HeaderConfig) > 0 {
-		headerConfig, _, err := kcpHeaderLoader.Load(c.HeaderConfig)
-		if err != nil {
-			return nil, errors.New("invalid mKCP header config.").Base(err).AtError()
-		}
-		ts, err := headerConfig.(Buildable).Build()
-		if err != nil {
-			return nil, errors.New("invalid mKCP header config").Base(err).AtError()
-		}
-		config.HeaderConfig = serial.ToTypedMessage(ts)
-	}
-
-	if c.Seed != nil {
-		config.Seed = &kcp.EncryptionSeed{Seed: *c.Seed}
+	if c.HeaderConfig != nil || c.Seed != nil {
+		return nil, errors.PrintRemovedFeatureError("mkcp header & seed", "finalmask/udp header-* & mkcp-original & mkcp-aes128gcm")
 	}

 	return config, nil
@@ -228,6 +218,19 @@ type SplitHTTPConfig struct {
 	Mode                 string            `json:"mode"`
 	Headers              map[string]string `json:"headers"`
 	XPaddingBytes        Int32Range        `json:"xPaddingBytes"`
+	XPaddingObfsMode     bool              `json:"xPaddingObfsMode"`
+	XPaddingKey          string            `json:"xPaddingKey"`
+	XPaddingHeader       string            `json:"xPaddingHeader"`
+	XPaddingPlacement    string            `json:"xPaddingPlacement"`
+	XPaddingMethod       string            `json:"xPaddingMethod"`
+	UplinkHTTPMethod     string            `json:"uplinkHTTPMethod"`
+	SessionPlacement     string            `json:"sessionPlacement"`
+	SessionKey           string            `json:"sessionKey"`
+	SeqPlacement         string            `json:"seqPlacement"`
+	SeqKey               string            `json:"seqKey"`
+	UplinkDataPlacement  string            `json:"uplinkDataPlacement"`
+	UplinkDataKey        string            `json:"uplinkDataKey"`
+	UplinkChunkSize      uint32            `json:"uplinkChunkSize"`
 	NoGRPCHeader         bool              `json:"noGRPCHeader"`
 	NoSSEHeader          bool              `json:"noSSEHeader"`
 	ScMaxEachPostBytes   Int32Range        `json:"scMaxEachPostBytes"`
@@ -287,6 +290,108 @@ func (c *SplitHTTPConfig) Build() (proto.Message, error) {
 		return nil, errors.New("xPaddingBytes cannot be disabled")
 	}

+	if c.XPaddingKey == "" {
+		c.XPaddingKey = "x_padding"
+	}
+
+	if c.XPaddingHeader == "" {
+		c.XPaddingHeader = "X-Padding"
+	}
+
+	switch c.XPaddingPlacement {
+	case "":
+		c.XPaddingPlacement = "queryInHeader"
+	case "cookie", "header", "query", "queryInHeader":
+	default:
+		return nil, errors.New("unsupported padding placement: " + c.XPaddingPlacement)
+	}
+
+	switch c.XPaddingMethod {
+	case "":
+		c.XPaddingMethod = "repeat-x"
+	case "repeat-x", "tokenish":
+	default:
+		return nil, errors.New("unsupported padding method: " + c.XPaddingMethod)
+	}
+
+	switch c.UplinkDataPlacement {
+	case "":
+		c.UplinkDataPlacement = "body"
+	case "body":
+	case "cookie", "header":
+		if c.Mode != "packet-up" {
+			return nil, errors.New("UplinkDataPlacement can be " + c.UplinkDataPlacement + " only in packet-up mode")
+		}
+	default:
+		return nil, errors.New("unsupported uplink data placement: " + c.UplinkDataPlacement)
+	}
+
+	if c.UplinkHTTPMethod == "" {
+		c.UplinkHTTPMethod = "POST"
+	}
+	c.UplinkHTTPMethod = strings.ToUpper(c.UplinkHTTPMethod)
+
+	if c.UplinkHTTPMethod == "GET" && c.Mode != "packet-up" {
+		return nil, errors.New("uplinkHTTPMethod can be GET only in packet-up mode")
+	}
+
+	switch c.SessionPlacement {
+	case "":
+		c.SessionPlacement = "path"
+	case "path", "cookie", "header", "query":
+	default:
+		return nil, errors.New("unsupported session placement: " + c.SessionPlacement)
+	}
+
+	switch c.SeqPlacement {
+	case "":
+		c.SeqPlacement = "path"
+	case "path", "cookie", "header", "query":
+		if c.SessionPlacement == "path" {
+			return nil, errors.New("SeqPlacement must be path when SessionPlacement is path")
+		}
+	default:
+		return nil, errors.New("unsupported seq placement: " + c.SeqPlacement)
+	}
+
+	if c.SessionPlacement != "path" && c.SessionKey == "" {
+		switch c.SessionPlacement {
+		case "cookie", "query":
+			c.SessionKey = "x_session"
+		case "header":
+			c.SessionKey = "X-Session"
+		}
+	}
+
+	if c.SeqPlacement != "path" && c.SeqKey == "" {
+		switch c.SeqPlacement {
+		case "cookie", "query":
+			c.SeqKey = "x_seq"
+		case "header":
+			c.SeqKey = "X-Seq"
+		}
+	}
+
+	if c.UplinkDataPlacement != "body" && c.UplinkDataKey == "" {
+		switch c.UplinkDataPlacement {
+		case "cookie":
+			c.UplinkDataKey = "x_data"
+		case "header":
+			c.UplinkDataKey = "X-Data"
+		}
+	}
+
+	if c.UplinkChunkSize == 0 {
+		switch c.UplinkDataPlacement {
+		case "cookie":
+			c.UplinkChunkSize = 3 * 1024 // 3KB
+		case "header":
+			c.UplinkChunkSize = 4 * 1024 // 4KB
+		}
+	} else if c.UplinkChunkSize < 64 {
+		c.UplinkChunkSize = 64
+	}
+
 	if c.Xmux.MaxConnections.To > 0 && c.Xmux.MaxConcurrency.To > 0 {
 		return nil, errors.New("maxConnections cannot be specified together with maxConcurrency")
 	}
@@ -305,6 +410,19 @@ func (c *SplitHTTPConfig) Build() (proto.Message, error) {
 		Mode:                 c.Mode,
 		Headers:              c.Headers,
 		XPaddingBytes:        newRangeConfig(c.XPaddingBytes),
+		XPaddingObfsMode:     c.XPaddingObfsMode,
+		XPaddingKey:          c.XPaddingKey,
+		XPaddingHeader:       c.XPaddingHeader,
+		XPaddingPlacement:    c.XPaddingPlacement,
+		XPaddingMethod:       c.XPaddingMethod,
+		UplinkHTTPMethod:     c.UplinkHTTPMethod,
+		SessionPlacement:     c.SessionPlacement,
+		SeqPlacement:         c.SeqPlacement,
+		SessionKey:           c.SessionKey,
+		SeqKey:               c.SeqKey,
+		UplinkDataPlacement:  c.UplinkDataPlacement,
+		UplinkDataKey:        c.UplinkDataKey,
+		UplinkChunkSize:      c.UplinkChunkSize,
 		NoGRPCHeader:         c.NoGRPCHeader,
 		NoSSEHeader:          c.NoSSEHeader,
 		ScMaxEachPostBytes:   newRangeConfig(c.ScMaxEachPostBytes),
@@ -631,7 +749,12 @@ func (c *TLSConfig) Build() (proto.Message, error) {
 	config.MasterKeyLog = c.MasterKeyLog

 	if c.AllowInsecure {
-		return nil, errors.PrintRemovedFeatureError(`"allowInsecure"`, `"pinnedPeerCertSha256"`)
+		if time.Now().After(time.Date(2026, 6, 1, 0, 0, 0, 0, time.UTC)) {
+			return nil, errors.PrintRemovedFeatureError(`"allowInsecure"`, `"pinnedPeerCertSha256"`)
+		} else {
+			errors.LogWarning(context.Background(), `"allowInsecure" will be removed automatically after 2026-06-01, please use "pinnedPeerCertSha256"(pcs) and "verifyPeerCertByName"(vcn) instead, PLEASE CONTACT YOUR SERVICE PROVIDER (AIRPORT)`)
+			config.AllowInsecure = true
+		}
 	}
 	if c.PinnedPeerCertSha256 != "" {
 		for v := range strings.SplitSeq(c.PinnedPeerCertSha256, ",") {
@@ -639,10 +762,14 @@ func (c *TLSConfig) Build() (proto.Message, error) {
 			if v == "" {
 				continue
 			}
-			hashValue, err := hex.DecodeString(v)
+			// remove colons for OpenSSL format
+			hashValue, err := hex.DecodeString(strings.ReplaceAll(v, ":", ""))
 			if err != nil {
 				return nil, err
 			}
+			if len(hashValue) != 32 {
+				return nil, errors.New("incorrect pinnedPeerCertSha256 length: ", v)
+			}
 			config.PinnedPeerCertSha256 = append(config.PinnedPeerCertSha256, hashValue)
 		}
 	}
@@ -1111,10 +1238,81 @@ func (c *SocketConfig) Build() (*internet.SocketConfig, error) {

 var (
 	udpmaskLoader = NewJSONConfigLoader(ConfigCreatorCache{
-		"salamander": func() interface{} { return new(Salamander) },
+		"header-dns":       func() interface{} { return new(Dns) },
+		"header-dtls":      func() interface{} { return new(Dtls) },
+		"header-srtp":      func() interface{} { return new(Srtp) },
+		"header-utp":       func() interface{} { return new(Utp) },
+		"header-wechat":    func() interface{} { return new(Wechat) },
+		"header-wireguard": func() interface{} { return new(Wireguard) },
+		"mkcp-original":    func() interface{} { return new(Original) },
+		"mkcp-aes128gcm":   func() interface{} { return new(Aes128Gcm) },
+		"salamander":       func() interface{} { return new(Salamander) },
+		"xdns":             func() interface{} { return new(Xdns) },
+		"xicmp":            func() interface{} { return new(Xicmp) },
 	}, "type", "settings")
 )

+type Dns struct {
+	Domain string `json:"domain"`
+}
+
+func (c *Dns) Build() (proto.Message, error) {
+	config := &dns.Config{}
+	config.Domain = "www.baidu.com"
+
+	if len(c.Domain) > 0 {
+		config.Domain = c.Domain
+	}
+
+	return config, nil
+}
+
+type Dtls struct{}
+
+func (c *Dtls) Build() (proto.Message, error) {
+	return &dtls.Config{}, nil
+}
+
+type Srtp struct{}
+
+func (c *Srtp) Build() (proto.Message, error) {
+	return &srtp.Config{}, nil
+}
+
+type Utp struct{}
+
+func (c *Utp) Build() (proto.Message, error) {
+	return &utp.Config{}, nil
+}
+
+type Wechat struct{}
+
+func (c *Wechat) Build() (proto.Message, error) {
+	return &wechat.Config{}, nil
+}
+
+type Wireguard struct{}
+
+func (c *Wireguard) Build() (proto.Message, error) {
+	return &wireguard.Config{}, nil
+}
+
+type Original struct{}
+
+func (c *Original) Build() (proto.Message, error) {
+	return &original.Config{}, nil
+}
+
+type Aes128Gcm struct {
+	Password string `json:"password"`
+}
+
+func (c *Aes128Gcm) Build() (proto.Message, error) {
+	return &aes128gcm.Config{
+		Password: c.Password,
+	}, nil
+}
+
 type Salamander struct {
 	Password string `json:"password"`
 }
@@ -1125,14 +1323,46 @@ func (c *Salamander) Build() (proto.Message, error) {
 	return config, nil
 }

-type FinalMask struct {
+type Xdns struct {
+	Domain string `json:"domain"`
+}
+
+func (c *Xdns) Build() (proto.Message, error) {
+	if c.Domain == "" {
+		return nil, errors.New("empty domain")
+	}
+
+	return &xdns.Config{
+		Domain: c.Domain,
+	}, nil
+}
+
+type Xicmp struct {
+	ListenIp string `json:"listenIp"`
+	Id       uint16 `json:"id"`
+}
+
+func (c *Xicmp) Build() (proto.Message, error) {
+	config := &xicmp.Config{
+		Ip: c.ListenIp,
+		Id: int32(c.Id),
+	}
+
+	if config.Ip == "" {
+		config.Ip = "0.0.0.0"
+	}
+
+	return config, nil
+}
+
+type Mask struct {
 	Type     string           `json:"type"`
 	Settings *json.RawMessage `json:"settings"`
 }

-func (c *FinalMask) Build(tcpmaskLoader bool) (proto.Message, error) {
+func (c *Mask) Build(tcp bool) (proto.Message, error) {
 	loader := udpmaskLoader
-	if tcpmaskLoader {
+	if tcp {
 		return nil, errors.New("")
 	}

@@ -1151,12 +1381,17 @@ func (c *FinalMask) Build(tcpmaskLoader bool) (proto.Message, error) {
 	return ts, nil
 }

+type FinalMask struct {
+	Tcp []Mask `json:"tcp"`
+	Udp []Mask `json:"udp"`
+}
+
 type StreamConfig struct {
 	Address             *Address           `json:"address"`
 	Port                uint16             `json:"port"`
 	Network             *TransportProtocol `json:"network"`
 	Security            string             `json:"security"`
-	Udpmasks            []*FinalMask       `json:"udpmasks"`
+	FinalMask           *FinalMask         `json:"finalmask"`
 	TLSSettings         *TLSConfig         `json:"tlsSettings"`
 	REALITYSettings     *REALITYConfig     `json:"realitySettings"`
 	RAWSettings         *TCPConfig         `json:"rawSettings"`
@@ -1306,12 +1541,21 @@ func (c *StreamConfig) Build() (*internet.StreamConfig, error) {
 		config.SocketSettings = ss
 	}

-	for _, mask := range c.Udpmasks {
-		u, err := mask.Build(false)
-		if err != nil {
-			return nil, errors.New("failed to build mask with type ", mask.Type).Base(err)
+	if c.FinalMask != nil {
+		for _, mask := range c.FinalMask.Tcp {
+			u, err := mask.Build(true)
+			if err != nil {
+				return nil, errors.New("failed to build mask with type ", mask.Type).Base(err)
+			}
+			config.Tcpmasks = append(config.Tcpmasks, serial.ToTypedMessage(u))
+		}
+		for _, mask := range c.FinalMask.Udp {
+			u, err := mask.Build(false)
+			if err != nil {
+				return nil, errors.New("failed to build mask with type ", mask.Type).Base(err)
+			}
+			config.Udpmasks = append(config.Udpmasks, serial.ToTypedMessage(u))
 		}
-		config.Udpmasks = append(config.Udpmasks, serial.ToTypedMessage(u))
 	}

 	return config, nil
--- a/infra/conf/xray.go
+++ b/infra/conf/xray.go
@@ -1,16 +1,21 @@
 package conf

 import (
+	"bytes"
 	"context"
 	"encoding/json"
+	"os"
 	"path/filepath"
+	"sort"
 	"strings"

 	"github.com/amnezia-vpn/amnezia-xray-core/app/dispatcher"
 	"github.com/amnezia-vpn/amnezia-xray-core/app/proxyman"
+	"github.com/amnezia-vpn/amnezia-xray-core/app/router"
 	"github.com/amnezia-vpn/amnezia-xray-core/app/stats"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/net"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/platform"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/serial"
 	core "github.com/amnezia-vpn/amnezia-xray-core/core"
 	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet"
@@ -607,6 +612,187 @@ func (c *Config) Build() (*core.Config, error) {
 	return config, nil
 }

+func (c *Config) BuildMPHCache(customMatcherFilePath *string) error {
+	var geosite []*router.GeoSite
+	deps := make(map[string][]string)
+	uniqueGeosites := make(map[string]bool)
+	uniqueTags := make(map[string]bool)
+	matcherFilePath := platform.GetAssetLocation("matcher.cache")
+
+	if customMatcherFilePath != nil {
+		matcherFilePath = *customMatcherFilePath
+	}
+
+	processGeosite := func(dStr string) bool {
+		prefix := ""
+		if strings.HasPrefix(dStr, "geosite:") {
+			prefix = "geosite:"
+		} else if strings.HasPrefix(dStr, "ext-domain:") {
+			prefix = "ext-domain:"
+		}
+		if prefix == "" {
+			return false
+		}
+		key := strings.ToLower(dStr)
+		country := strings.ToUpper(dStr[len(prefix):])
+		if !uniqueGeosites[country] {
+			ds, err := loadGeositeWithAttr("geosite.dat", country)
+			if err == nil {
+				uniqueGeosites[country] = true
+				geosite = append(geosite, &router.GeoSite{CountryCode: key, Domain: ds})
+			}
+		}
+		return true
+	}
+
+	processDomains := func(tag string, rawDomains []string) {
+		var manualDomains []*router.Domain
+		var dDeps []string
+		for _, dStr := range rawDomains {
+			if processGeosite(dStr) {
+				dDeps = append(dDeps, strings.ToLower(dStr))
+			} else {
+				ds, err := parseDomainRule(dStr)
+				if err == nil {
+					manualDomains = append(manualDomains, ds...)
+				}
+			}
+		}
+		if len(manualDomains) > 0 {
+			if !uniqueTags[tag] {
+				uniqueTags[tag] = true
+				geosite = append(geosite, &router.GeoSite{CountryCode: tag, Domain: manualDomains})
+			}
+		}
+		if len(dDeps) > 0 {
+			deps[tag] = append(deps[tag], dDeps...)
+		}
+	}
+
+	// proccess rules
+	if c.RouterConfig != nil {
+		for _, rawRule := range c.RouterConfig.RuleList {
+			type SimpleRule struct {
+				RuleTag string      `json:"ruleTag"`
+				Domain  *StringList `json:"domain"`
+				Domains *StringList `json:"domains"`
+			}
+			var sr SimpleRule
+			json.Unmarshal(rawRule, &sr)
+			if sr.RuleTag == "" {
+				continue
+			}
+			var allDomains []string
+			if sr.Domain != nil {
+				allDomains = append(allDomains, *sr.Domain...)
+			}
+			if sr.Domains != nil {
+				allDomains = append(allDomains, *sr.Domains...)
+			}
+			processDomains(sr.RuleTag, allDomains)
+		}
+	}
+
+	// proccess dns servers
+	if c.DNSConfig != nil {
+		for _, ns := range c.DNSConfig.Servers {
+			if ns.Tag == "" {
+				continue
+			}
+			processDomains(ns.Tag, ns.Domains)
+		}
+	}
+
+	var hostIPs map[string][]string
+	if c.DNSConfig != nil && c.DNSConfig.Hosts != nil {
+		hostIPs = make(map[string][]string)
+		var hostDeps []string
+		var hostPatterns []string
+
+		// use raw map to avoid expanding geosites
+		var domains []string
+		for domain := range c.DNSConfig.Hosts.Hosts {
+			domains = append(domains, domain)
+		}
+		sort.Strings(domains)
+
+		manualHostGroups := make(map[string][]*router.Domain)
+		manualHostIPs := make(map[string][]string)
+		manualHostNames := make(map[string]string)
+
+		for _, domain := range domains {
+			ha := c.DNSConfig.Hosts.Hosts[domain]
+			m := getHostMapping(ha)
+
+			var ips []string
+			if m.ProxiedDomain != "" {
+				ips = append(ips, m.ProxiedDomain)
+			} else {
+				for _, ip := range m.Ip {
+					ips = append(ips, net.IPAddress(ip).String())
+				}
+			}
+
+			if processGeosite(domain) {
+				tag := strings.ToLower(domain)
+				hostDeps = append(hostDeps, tag)
+				hostIPs[tag] = ips
+				hostPatterns = append(hostPatterns, domain)
+			} else {
+				// build manual domains by their destination IPs
+				sort.Strings(ips)
+				ipKey := strings.Join(ips, ",")
+				ds, err := parseDomainRule(domain)
+				if err == nil {
+					manualHostGroups[ipKey] = append(manualHostGroups[ipKey], ds...)
+					manualHostIPs[ipKey] = ips
+					if _, ok := manualHostNames[ipKey]; !ok {
+						manualHostNames[ipKey] = domain
+					}
+				}
+			}
+		}
+
+		// create manual host groups
+		var ipKeys []string
+		for k := range manualHostGroups {
+			ipKeys = append(ipKeys, k)
+		}
+		sort.Strings(ipKeys)
+
+		for _, k := range ipKeys {
+			tag := manualHostNames[k]
+			geosite = append(geosite, &router.GeoSite{CountryCode: tag, Domain: manualHostGroups[k]})
+			hostDeps = append(hostDeps, tag)
+			hostIPs[tag] = manualHostIPs[k]
+
+			// record tag _ORDER links the matcher to IP addresses
+			hostPatterns = append(hostPatterns, tag)
+		}
+
+		deps["HOSTS"] = hostDeps
+		hostIPs["_ORDER"] = hostPatterns
+	}
+
+	f, err := os.Create(matcherFilePath)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	var buf bytes.Buffer
+
+	if err := router.SerializeGeoSiteList(geosite, deps, hostIPs, &buf); err != nil {
+		return err
+	}
+
+	if _, err := f.Write(buf.Bytes()); err != nil {
+		return err
+	}
+
+	return nil
+}
+
 // Convert string to Address.
 func ParseSendThough(Addr *string) *Address {
 	var addr Address
--- a/main/commands/all/buildmphcache.go
+++ b/main/commands/all/buildmphcache.go
@@ -0,0 +1,52 @@
+package all
+
+import (
+	"os"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common/platform"
+	"github.com/amnezia-vpn/amnezia-xray-core/infra/conf/serial"
+	"github.com/amnezia-vpn/amnezia-xray-core/main/commands/base"
+)
+
+var cmdBuildMphCache = &base.Command{
+	UsageLine: `{{.Exec}} buildMphCache [-c config.json] [-o domain.cache]`,
+	Short:     `Build domain matcher cache`,
+	Long: `
+Build domain matcher cache from a configuration file.
+
+Example: {{.Exec}} buildMphCache -c config.json -o domain.cache
+`,
+}
+
+func init() {
+	cmdBuildMphCache.Run = executeBuildMphCache
+}
+
+var (
+	configPath = cmdBuildMphCache.Flag.String("c", "config.json", "Config file path")
+	outputPath = cmdBuildMphCache.Flag.String("o", "domain.cache", "Output cache file path")
+)
+
+func executeBuildMphCache(cmd *base.Command, args []string) {
+	cf, err := os.Open(*configPath)
+	if err != nil {
+		base.Fatalf("failed to open config file: %v", err)
+	}
+	defer cf.Close()
+
+	// prevent using existing cache
+	domainMatcherPath := platform.NewEnvFlag(platform.MphCachePath).GetValue(func() string { return "" })
+	if domainMatcherPath != "" {
+		os.Setenv("XRAY_MPH_CACHE", "")
+		defer os.Setenv("XRAY_MPH_CACHE", domainMatcherPath)
+	}
+
+	config, err := serial.DecodeJSONConfig(cf)
+	if err != nil {
+		base.Fatalf("failed to decode config file: %v", err)
+	}
+
+	if err := config.BuildMPHCache(outputPath); err != nil {
+		base.Fatalf("failed to build MPH cache: %v", err)
+	}
+}
--- a/main/commands/all/commands.go
+++ b/main/commands/all/commands.go
@@ -19,5 +19,6 @@ func init() {
 		cmdMLDSA65,
 		cmdMLKEM768,
 		cmdVLESSEnc,
+		cmdBuildMphCache,
 	)
 }
--- a/main/commands/all/tls/hash.go
+++ b/main/commands/all/tls/hash.go
@@ -0,0 +1,78 @@
+package tls
+
+import (
+	"bytes"
+	"crypto/x509"
+	"encoding/pem"
+	"flag"
+	"fmt"
+	"os"
+	"text/tabwriter"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/main/commands/base"
+	. "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/tls"
+)
+
+var cmdHash = &base.Command{
+	UsageLine: "{{.Exec}} tls hash",
+	Short:     "Calculate TLS certificate hash.",
+	Long: `
+	xray tls hash --cert <cert.pem>
+	Calculate TLS certificate hash.
+	`,
+}
+
+func init() {
+	cmdHash.Run = executeHash // break init loop
+}
+
+var input = cmdHash.Flag.String("cert", "fullchain.pem", "The file path of the certificate")
+
+func executeHash(cmd *base.Command, args []string) {
+	fs := flag.NewFlagSet("hash", flag.ContinueOnError)
+	if err := fs.Parse(args); err != nil {
+		fmt.Println(err)
+		return
+	}
+	certContent, err := os.ReadFile(*input)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	var certs []*x509.Certificate
+	if bytes.Contains(certContent, []byte("BEGIN")) {
+		for {
+			block, remain := pem.Decode(certContent)
+			if block == nil {
+				break
+			}
+			cert, err := x509.ParseCertificate(block.Bytes)
+			if err != nil {
+				fmt.Println("Unable to decode certificate:", err)
+				return
+			}
+			certs = append(certs, cert)
+			certContent = remain
+		}
+	} else {
+		certs, err = x509.ParseCertificates(certContent)
+		if err != nil {
+			fmt.Println("Unable to parse certificates:", err)
+			return
+		}
+	}
+	if len(certs) == 0 {
+		fmt.Println("No certificates found")
+		return
+	}
+	tabWriter := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
+	for i, cert := range certs {
+		hash := GenerateCertHashHex(cert)
+		if i == 0 {
+			fmt.Fprintf(tabWriter, "Leaf SHA256:\t%s\n", hash)
+		} else {
+			fmt.Fprintf(tabWriter, "CA <%s> SHA256:\t%s\n", cert.Subject.CommonName, hash)
+		}
+	}
+	tabWriter.Flush()
+}
--- a/main/commands/all/tls/leafcerthash.go
+++ b/main/commands/all/tls/leafcerthash.go
@@ -1,44 +0,0 @@
-package tls
-
-import (
-	"flag"
-	"fmt"
-	"os"
-
-	"github.com/amnezia-vpn/amnezia-xray-core/main/commands/base"
-	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/tls"
-)
-
-var cmdLeafCertHash = &base.Command{
-	UsageLine: "{{.Exec}} tls leafCertHash",
-	Short:     "Calculate TLS leaf certificate hash.",
-	Long: `
-	xray tls leafCertHash --cert <cert.pem>
-	Calculate TLS leaf certificate hash.
-	`,
-}
-
-func init() {
-	cmdLeafCertHash.Run = executeLeafCertHash // break init loop
-}
-
-var input = cmdLeafCertHash.Flag.String("cert", "fullchain.pem", "The file path of the leaf certificate")
-
-func executeLeafCertHash(cmd *base.Command, args []string) {
-	fs := flag.NewFlagSet("leafCertHash", flag.ContinueOnError)
-	if err := fs.Parse(args); err != nil {
-		fmt.Println(err)
-		return
-	}
-	certContent, err := os.ReadFile(*input)
-	if err != nil {
-		fmt.Println(err)
-		return
-	}
-	certChainHashB64, err := tls.CalculatePEMLeafCertSHA256Hash(certContent)
-	if err != nil {
-		fmt.Println("failed to decode cert", err)
-		return
-	}
-	fmt.Println(certChainHashB64)
-}
--- a/main/commands/all/tls/ping.go
+++ b/main/commands/all/tls/ping.go
@@ -6,8 +6,13 @@ import (
 	"encoding/hex"
 	"fmt"
 	"net"
+	"os"
 	"strconv"
+	"text/tabwriter"

+	utls "github.com/refraction-networking/utls"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common/utils"
 	"github.com/amnezia-vpn/amnezia-xray-core/main/commands/base"
 	. "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/tls"
 )
@@ -46,6 +51,7 @@ func executePing(cmd *base.Command, args []string) {
 	} else {
 		TargetPort, _ = strconv.Atoi(port)
 	}
+	tabWriter := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)

 	var ip net.IP
 	if len(*pingIPStr) > 0 {
@@ -70,21 +76,20 @@ func executePing(cmd *base.Command, args []string) {
 		if err != nil {
 			base.Fatalf("Failed to dial tcp: %s", err)
 		}
-		tlsConn := gotls.Client(tcpConn, &gotls.Config{
+		tlsConn := GeneraticUClient(tcpConn, &gotls.Config{
 			InsecureSkipVerify: true,
 			NextProtos:         []string{"h2", "http/1.1"},
 			MaxVersion:         gotls.VersionTLS13,
 			MinVersion:         gotls.VersionTLS12,
-			// Do not release tool before v5's refactor
-			// VerifyPeerCertificate: showCert(),
 		})
 		err = tlsConn.Handshake()
 		if err != nil {
 			fmt.Println("Handshake failure: ", err)
 		} else {
 			fmt.Println("Handshake succeeded")
-			printTLSConnDetail(tlsConn)
-			printCertificates(tlsConn.ConnectionState().PeerCertificates)
+			printTLSConnDetail(tabWriter, tlsConn)
+			printCertificates(tabWriter, tlsConn.ConnectionState().PeerCertificates)
+			tabWriter.Flush()
 		}
 		tlsConn.Close()
 	}
@@ -96,21 +101,20 @@ func executePing(cmd *base.Command, args []string) {
 		if err != nil {
 			base.Fatalf("Failed to dial tcp: %s", err)
 		}
-		tlsConn := gotls.Client(tcpConn, &gotls.Config{
+		tlsConn := GeneraticUClient(tcpConn, &gotls.Config{
 			ServerName: domain,
 			NextProtos: []string{"h2", "http/1.1"},
 			MaxVersion: gotls.VersionTLS13,
 			MinVersion: gotls.VersionTLS12,
-			// Do not release tool before v5's refactor
-			// VerifyPeerCertificate: showCert(),
 		})
 		err = tlsConn.Handshake()
 		if err != nil {
 			fmt.Println("Handshake failure: ", err)
 		} else {
 			fmt.Println("Handshake succeeded")
-			printTLSConnDetail(tlsConn)
-			printCertificates(tlsConn.ConnectionState().PeerCertificates)
+			printTLSConnDetail(tabWriter, tlsConn)
+			printCertificates(tabWriter, tlsConn.ConnectionState().PeerCertificates)
+			tabWriter.Flush()
 		}
 		tlsConn.Close()
 	}
@@ -119,51 +123,45 @@ func executePing(cmd *base.Command, args []string) {
 	fmt.Println("TLS ping finished")
 }

-func printCertificates(certs []*x509.Certificate) {
+func printCertificates(tabWriter *tabwriter.Writer, certs []*x509.Certificate) {
 	var leaf *x509.Certificate
+	var CAs []*x509.Certificate
 	var length int
 	for _, cert := range certs {
 		length += len(cert.Raw)
 		if len(cert.DNSNames) != 0 {
 			leaf = cert
+		} else {
+			CAs = append(CAs, cert)
 		}
 	}
-	fmt.Println("Certificate chain's total length: ", length, "(certs count: "+strconv.Itoa(len(certs))+")")
+	fmt.Fprintf(tabWriter, "Certificate chain's total length:\t%d (certs count: %s)\n", length, 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)
+		fmt.Fprintf(tabWriter, "Cert's signature algorithm:\t%s\n", leaf.SignatureAlgorithm.String())
+		fmt.Fprintf(tabWriter, "Cert's publicKey algorithm:\t%s\n", leaf.PublicKeyAlgorithm.String())
+		fmt.Fprintf(tabWriter, "Cert's leaf SHA256:\t%s\n", hex.EncodeToString(GenerateCertHash(leaf)))
+		for _, ca := range CAs {
+			fmt.Fprintf(tabWriter, "Cert's CA <%s> SHA256:\t%s\n", ca.Subject.CommonName, hex.EncodeToString(GenerateCertHash(ca)))
+		}
+		fmt.Fprintf(tabWriter, "Cert's allowed domains:\t%v\n", leaf.DNSNames)
 	}
 }

-func printTLSConnDetail(tlsConn *gotls.Conn) {
+func printTLSConnDetail(tabWriter *tabwriter.Writer, tlsConn *utls.UConn) {
 	connectionState := tlsConn.ConnectionState()
 	var tlsVersion string
-	if connectionState.Version == gotls.VersionTLS13 {
+	switch connectionState.Version {
+	case gotls.VersionTLS13:
 		tlsVersion = "TLS 1.3"
-	} else if connectionState.Version == gotls.VersionTLS12 {
+	case gotls.VersionTLS12:
 		tlsVersion = "TLS 1.2"
 	}
-	fmt.Println("TLS Version: ", tlsVersion)
-	curveID := connectionState.CurveID
-	if curveID != 0 {
-		PostQuantum := (curveID == gotls.X25519MLKEM768)
-		fmt.Println("TLS Post-Quantum key exchange: ", PostQuantum, "("+curveID.String()+")")
+	fmt.Fprintf(tabWriter, "TLS Version:\t%s\n", tlsVersion)
+	curveID := utils.AccessField[utls.CurveID](tlsConn.Conn, "curveID")
+	if curveID != nil {
+		PostQuantum := (*curveID == utls.X25519MLKEM768)
+		fmt.Fprintf(tabWriter, "TLS Post-Quantum key exchange:\t%t (%s)\n", PostQuantum, curveID.String())
 	} else {
-		fmt.Println("TLS Post-Quantum key exchange:  false (RSA Exchange)")
-	}
-}
-
-func showCert() func(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
-	return func(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
-		var hash []byte
-		for _, asn1Data := range rawCerts {
-			cert, _ := x509.ParseCertificate(asn1Data)
-			if cert.IsCA {
-				hash = GenerateCertHash(cert)
-			}
-		}
-		fmt.Println("Certificate Leaf Hash: ", hex.EncodeToString(hash))
-		return nil
+		fmt.Fprintf(tabWriter, "TLS Post-Quantum key exchange:  false (RSA Exchange)\n")
 	}
 }
--- a/main/commands/all/tls/tls.go
+++ b/main/commands/all/tls/tls.go
@@ -13,7 +13,7 @@ var CmdTLS = &base.Command{
 	Commands: []*base.Command{
 		cmdCert,
 		cmdPing,
-		cmdLeafCertHash,
+		cmdHash,
 		cmdECH,
 	},
 }
--- a/main/distro/all/all.go
+++ b/main/distro/all/all.go
@@ -63,11 +63,6 @@ import (
 	// Transport headers
 	_ "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/headers/http"
 	_ "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/headers/noop"
-	_ "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/headers/srtp"
-	_ "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/headers/tls"
-	_ "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/headers/utp"
-	_ "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/headers/wechat"
-	_ "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/headers/wireguard"

 	// JSON & TOML & YAML
 	_ "github.com/amnezia-vpn/amnezia-xray-core/main/json"
--- a/proxy/http/client.go
+++ b/proxy/http/client.go
@@ -21,6 +21,7 @@ import (
 	"github.com/amnezia-vpn/amnezia-xray-core/common/session"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/signal"
 	"github.com/amnezia-vpn/amnezia-xray-core/common/task"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/utils"
 	"github.com/amnezia-vpn/amnezia-xray-core/core"
 	"github.com/amnezia-vpn/amnezia-xray-core/features/policy"
 	"github.com/amnezia-vpn/amnezia-xray-core/transport"
@@ -219,6 +220,9 @@ func setUpHTTPTunnel(ctx context.Context, dest net.Destination, target string, u
 	for _, h := range header {
 		req.Header.Set(h.Key, h.Value)
 	}
+	if req.Header.Get("User-Agent") == "" {
+		req.Header.Set("User-Agent", utils.ChromeUA)
+	}

 	connectHTTP1 := func(rawConn net.Conn) (net.Conn, error) {
 		req.Header.Set("Proxy-Connection", "Keep-Alive")
--- a/transport/internet/finalmask/finalmask.go
+++ b/transport/internet/finalmask/finalmask.go
@@ -4,17 +4,15 @@ import (
 	"net"
 )

+type ConnSize interface {
+	Size() int32
+}
+
 type Udpmask interface {
 	UDP()

-	WrapConnClient(net.Conn) (net.Conn, error)
-	WrapConnServer(net.Conn) (net.Conn, error)
-
-	WrapPacketConnClient(net.PacketConn) (net.PacketConn, error)
-	WrapPacketConnServer(net.PacketConn) (net.PacketConn, error)
-
-	Size() int
-	Serialize([]byte)
+	WrapPacketConnClient(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error)
+	WrapPacketConnServer(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error)
 }

 type UdpmaskManager struct {
@@ -27,66 +25,32 @@ func NewUdpmaskManager(udpmasks []Udpmask) *UdpmaskManager {
 	}
 }

-func (m *UdpmaskManager) WrapConnClient(raw net.Conn) (net.Conn, error) {
-	var err error
-	for _, mask := range m.udpmasks {
-		raw, err = mask.WrapConnClient(raw)
-		if err != nil {
-			return nil, err
-		}
-	}
-	return raw, nil
-}
-
-func (m *UdpmaskManager) WrapConnServer(raw net.Conn) (net.Conn, error) {
-	var err error
-	for _, mask := range m.udpmasks {
-		raw, err = mask.WrapConnServer(raw)
-		if err != nil {
-			return nil, err
-		}
-	}
-	return raw, nil
-}
-
 func (m *UdpmaskManager) WrapPacketConnClient(raw net.PacketConn) (net.PacketConn, error) {
+	leaveSize := int32(0)
 	var err error
-	for _, mask := range m.udpmasks {
-		raw, err = mask.WrapPacketConnClient(raw)
+	for i, mask := range m.udpmasks {
+		raw, err = mask.WrapPacketConnClient(raw, i == len(m.udpmasks)-1, leaveSize, i == 0)
 		if err != nil {
 			return nil, err
 		}
+		leaveSize += raw.(ConnSize).Size()
 	}
 	return raw, nil
 }

 func (m *UdpmaskManager) WrapPacketConnServer(raw net.PacketConn) (net.PacketConn, error) {
+	leaveSize := int32(0)
 	var err error
-	for _, mask := range m.udpmasks {
-		raw, err = mask.WrapPacketConnServer(raw)
+	for i, mask := range m.udpmasks {
+		raw, err = mask.WrapPacketConnServer(raw, i == len(m.udpmasks)-1, leaveSize, i == 0)
 		if err != nil {
 			return nil, err
 		}
+		leaveSize += raw.(ConnSize).Size()
 	}
 	return raw, nil
 }

-func (m *UdpmaskManager) Size() int {
-	size := 0
-	for _, mask := range m.udpmasks {
-		size += mask.Size()
-	}
-	return size
-}
-
-func (m *UdpmaskManager) Serialize(b []byte) {
-	index := 0
-	for _, mask := range m.udpmasks {
-		mask.Serialize(b[index:])
-		index += mask.Size()
-	}
-}
-
 type Tcpmask interface {
 	TCP()

--- a/transport/internet/finalmask/header/dns/config.go
+++ b/transport/internet/finalmask/header/dns/config.go
@@ -0,0 +1,16 @@
+package dns
+
+import (
+	"net"
+)
+
+func (c *Config) UDP() {
+}
+
+func (c *Config) WrapPacketConnClient(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *Config) WrapPacketConnServer(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnServer(c, raw, first, leaveSize)
+}
--- a/transport/internet/finalmask/header/dns/config.pb.go
+++ b/transport/internet/finalmask/header/dns/config.pb.go
@@ -0,0 +1,123 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.11
+// 	protoc        v3.21.12
+// source: transport/internet/finalmask/header/dns/config.proto
+
+package dns
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Config struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Domain        string                 `protobuf:"bytes,1,opt,name=domain,proto3" json:"domain,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Config) Reset() {
+	*x = Config{}
+	mi := &file_transport_internet_finalmask_header_dns_config_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Config) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Config) ProtoMessage() {}
+
+func (x *Config) ProtoReflect() protoreflect.Message {
+	mi := &file_transport_internet_finalmask_header_dns_config_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Config.ProtoReflect.Descriptor instead.
+func (*Config) Descriptor() ([]byte, []int) {
+	return file_transport_internet_finalmask_header_dns_config_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Config) GetDomain() string {
+	if x != nil {
+		return x.Domain
+	}
+	return ""
+}
+
+var File_transport_internet_finalmask_header_dns_config_proto protoreflect.FileDescriptor
+
+const file_transport_internet_finalmask_header_dns_config_proto_rawDesc = "" +
+	"\n" +
+	"4transport/internet/finalmask/header/dns/config.proto\x12,xray.transport.internet.finalmask.header.dns\" \n" +
+	"\x06Config\x12\x16\n" +
+	"\x06domain\x18\x01 \x01(\tR\x06domainB\xb5\x01\n" +
+	"0com.xray.transport.internet.finalmask.header.dnsP\x01ZPgithub.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/dns\xaa\x02,Xray.Transport.Internet.Finalmask.Header.Dnsb\x06proto3"
+
+var (
+	file_transport_internet_finalmask_header_dns_config_proto_rawDescOnce sync.Once
+	file_transport_internet_finalmask_header_dns_config_proto_rawDescData []byte
+)
+
+func file_transport_internet_finalmask_header_dns_config_proto_rawDescGZIP() []byte {
+	file_transport_internet_finalmask_header_dns_config_proto_rawDescOnce.Do(func() {
+		file_transport_internet_finalmask_header_dns_config_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_header_dns_config_proto_rawDesc), len(file_transport_internet_finalmask_header_dns_config_proto_rawDesc)))
+	})
+	return file_transport_internet_finalmask_header_dns_config_proto_rawDescData
+}
+
+var file_transport_internet_finalmask_header_dns_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_transport_internet_finalmask_header_dns_config_proto_goTypes = []any{
+	(*Config)(nil), // 0: xray.transport.internet.finalmask.header.dns.Config
+}
+var file_transport_internet_finalmask_header_dns_config_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_transport_internet_finalmask_header_dns_config_proto_init() }
+func file_transport_internet_finalmask_header_dns_config_proto_init() {
+	if File_transport_internet_finalmask_header_dns_config_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_header_dns_config_proto_rawDesc), len(file_transport_internet_finalmask_header_dns_config_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_transport_internet_finalmask_header_dns_config_proto_goTypes,
+		DependencyIndexes: file_transport_internet_finalmask_header_dns_config_proto_depIdxs,
+		MessageInfos:      file_transport_internet_finalmask_header_dns_config_proto_msgTypes,
+	}.Build()
+	File_transport_internet_finalmask_header_dns_config_proto = out.File
+	file_transport_internet_finalmask_header_dns_config_proto_goTypes = nil
+	file_transport_internet_finalmask_header_dns_config_proto_depIdxs = nil
+}
--- a/transport/internet/finalmask/header/dns/config.proto
+++ b/transport/internet/finalmask/header/dns/config.proto
@@ -0,0 +1,11 @@
+syntax = "proto3";
+
+package xray.transport.internet.finalmask.header.dns;
+option csharp_namespace = "Xray.Transport.Internet.Finalmask.Header.Dns";
+option go_package = "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/dns";
+option java_package = "com.xray.transport.internet.finalmask.header.dns";
+option java_multiple_files = true;
+
+message Config {
+    string domain = 1;    
+}
--- a/transport/internet/finalmask/header/dns/conn.go
+++ b/transport/internet/finalmask/header/dns/conn.go
@@ -0,0 +1,241 @@
+package dns
+
+import (
+	"encoding/binary"
+	"io"
+	"net"
+	sync "sync"
+	"time"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common/dice"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
+)
+
+func packDomainName(s string, msg []byte) (off1 int, err error) {
+	off := 0
+	ls := len(s)
+	// Each dot ends a segment of the name.
+	// We trade each dot byte for a length byte.
+	// Except for escaped dots (\.), which are normal dots.
+	// There is also a trailing zero.
+
+	// Emit sequence of counted strings, chopping at dots.
+	var (
+		begin int
+		bs    []byte
+	)
+	for i := 0; i < ls; i++ {
+		var c byte
+		if bs == nil {
+			c = s[i]
+		} else {
+			c = bs[i]
+		}
+
+		switch c {
+		case '\\':
+			if off+1 > len(msg) {
+				return len(msg), errors.New("buffer size too small")
+			}
+
+			if bs == nil {
+				bs = []byte(s)
+			}
+
+			copy(bs[i:ls-1], bs[i+1:])
+			ls--
+		case '.':
+			labelLen := i - begin
+			if labelLen >= 1<<6 { // top two bits of length must be clear
+				return len(msg), errors.New("bad rdata")
+			}
+
+			// off can already (we're in a loop) be bigger than len(msg)
+			// this happens when a name isn't fully qualified
+			if off+1+labelLen > len(msg) {
+				return len(msg), errors.New("buffer size too small")
+			}
+
+			// The following is covered by the length check above.
+			msg[off] = byte(labelLen)
+
+			if bs == nil {
+				copy(msg[off+1:], s[begin:i])
+			} else {
+				copy(msg[off+1:], bs[begin:i])
+			}
+			off += 1 + labelLen
+			begin = i + 1
+		default:
+		}
+	}
+
+	if off < len(msg) {
+		msg[off] = 0
+	}
+
+	return off + 1, nil
+}
+
+type dns struct {
+	header []byte
+}
+
+func (h *dns) Size() int32 {
+	return int32(len(h.header))
+}
+
+func (h *dns) Serialize(b []byte) {
+	copy(b, h.header)
+	binary.BigEndian.PutUint16(b[0:], dice.RollUint16())
+}
+
+type dnsConn struct {
+	first     bool
+	leaveSize int32
+
+	conn   net.PacketConn
+	header *dns
+
+	readBuf    []byte
+	readMutex  sync.Mutex
+	writeBuf   []byte
+	writeMutex sync.Mutex
+}
+
+func NewConnClient(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	var header []byte
+	header = binary.BigEndian.AppendUint16(header, 0x0000) // Transaction ID
+	header = binary.BigEndian.AppendUint16(header, 0x0100) // Flags: Standard query
+	header = binary.BigEndian.AppendUint16(header, 0x0001) // Questions
+	header = binary.BigEndian.AppendUint16(header, 0x0000) // Answer RRs
+	header = binary.BigEndian.AppendUint16(header, 0x0000) // Authority RRs
+	header = binary.BigEndian.AppendUint16(header, 0x0000) // Additional RRs
+	buf := make([]byte, 0x100)
+	off1, err := packDomainName(c.Domain+".", buf)
+	if err != nil {
+		return nil, err
+	}
+	header = append(header, buf[:off1]...)
+	header = binary.BigEndian.AppendUint16(header, 0x0001) // Type: A
+	header = binary.BigEndian.AppendUint16(header, 0x0001) // Class: IN
+
+	conn := &dnsConn{
+		first:     first,
+		leaveSize: leaveSize,
+
+		conn: raw,
+		header: &dns{
+			header: header,
+		},
+	}
+
+	if first {
+		conn.readBuf = make([]byte, 8192)
+		conn.writeBuf = make([]byte, 8192)
+	}
+
+	return conn, nil
+}
+
+func NewConnServer(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *dnsConn) Size() int32 {
+	return c.header.Size()
+}
+
+func (c *dnsConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	if c.first {
+		c.readMutex.Lock()
+
+		n, addr, err = c.conn.ReadFrom(c.readBuf)
+		if err != nil {
+			c.readMutex.Unlock()
+			return n, addr, err
+		}
+
+		if n < int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+		}
+
+		if len(p) < n-int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+		}
+
+		copy(p, c.readBuf[c.Size():n])
+
+		c.readMutex.Unlock()
+		return n - int(c.Size()), addr, err
+	}
+
+	n, addr, err = c.conn.ReadFrom(p)
+	if err != nil {
+		return n, addr, err
+	}
+
+	if n < int(c.Size()) {
+		return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+	}
+
+	copy(p, p[c.Size():n])
+
+	return n - int(c.Size()), addr, err
+}
+
+func (c *dnsConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	if c.first {
+		if c.leaveSize+c.Size()+int32(len(p)) > 8192 {
+			return 0, errors.New("too many masks")
+		}
+
+		c.writeMutex.Lock()
+
+		n = copy(c.writeBuf[c.leaveSize+c.Size():], p)
+		n += int(c.leaveSize) + int(c.Size())
+
+		c.header.Serialize(c.writeBuf[c.leaveSize : c.leaveSize+c.Size()])
+
+		nn, err := c.conn.WriteTo(c.writeBuf[:n], addr)
+
+		if err != nil {
+			c.writeMutex.Unlock()
+			return 0, err
+		}
+
+		if nn != n {
+			c.writeMutex.Unlock()
+			return 0, errors.New("nn != n")
+		}
+
+		c.writeMutex.Unlock()
+		return len(p), nil
+	}
+
+	c.header.Serialize(p[c.leaveSize : c.leaveSize+c.Size()])
+
+	return c.conn.WriteTo(p, addr)
+}
+
+func (c *dnsConn) Close() error {
+	return c.conn.Close()
+}
+
+func (c *dnsConn) LocalAddr() net.Addr {
+	return c.conn.LocalAddr()
+}
+
+func (c *dnsConn) SetDeadline(t time.Time) error {
+	return c.conn.SetDeadline(t)
+}
+
+func (c *dnsConn) SetReadDeadline(t time.Time) error {
+	return c.conn.SetReadDeadline(t)
+}
+
+func (c *dnsConn) SetWriteDeadline(t time.Time) error {
+	return c.conn.SetWriteDeadline(t)
+}
--- a/transport/internet/finalmask/header/dtls/config.go
+++ b/transport/internet/finalmask/header/dtls/config.go
@@ -0,0 +1,16 @@
+package dtls
+
+import (
+	"net"
+)
+
+func (c *Config) UDP() {
+}
+
+func (c *Config) WrapPacketConnClient(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *Config) WrapPacketConnServer(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnServer(c, raw, first, leaveSize)
+}
--- a/transport/internet/finalmask/header/dtls/config.pb.go
+++ b/transport/internet/finalmask/header/dtls/config.pb.go
@@ -0,0 +1,114 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.11
+// 	protoc        v3.21.12
+// source: transport/internet/finalmask/header/dtls/config.proto
+
+package dtls
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Config struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Config) Reset() {
+	*x = Config{}
+	mi := &file_transport_internet_finalmask_header_dtls_config_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Config) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Config) ProtoMessage() {}
+
+func (x *Config) ProtoReflect() protoreflect.Message {
+	mi := &file_transport_internet_finalmask_header_dtls_config_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Config.ProtoReflect.Descriptor instead.
+func (*Config) Descriptor() ([]byte, []int) {
+	return file_transport_internet_finalmask_header_dtls_config_proto_rawDescGZIP(), []int{0}
+}
+
+var File_transport_internet_finalmask_header_dtls_config_proto protoreflect.FileDescriptor
+
+const file_transport_internet_finalmask_header_dtls_config_proto_rawDesc = "" +
+	"\n" +
+	"5transport/internet/finalmask/header/dtls/config.proto\x12-xray.transport.internet.finalmask.header.dtls\"\b\n" +
+	"\x06ConfigB\xb8\x01\n" +
+	"1com.xray.transport.internet.finalmask.header.dtlsP\x01ZQgithub.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/dtls\xaa\x02-Xray.Transport.Internet.Finalmask.Header.Dtlsb\x06proto3"
+
+var (
+	file_transport_internet_finalmask_header_dtls_config_proto_rawDescOnce sync.Once
+	file_transport_internet_finalmask_header_dtls_config_proto_rawDescData []byte
+)
+
+func file_transport_internet_finalmask_header_dtls_config_proto_rawDescGZIP() []byte {
+	file_transport_internet_finalmask_header_dtls_config_proto_rawDescOnce.Do(func() {
+		file_transport_internet_finalmask_header_dtls_config_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_header_dtls_config_proto_rawDesc), len(file_transport_internet_finalmask_header_dtls_config_proto_rawDesc)))
+	})
+	return file_transport_internet_finalmask_header_dtls_config_proto_rawDescData
+}
+
+var file_transport_internet_finalmask_header_dtls_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_transport_internet_finalmask_header_dtls_config_proto_goTypes = []any{
+	(*Config)(nil), // 0: xray.transport.internet.finalmask.header.dtls.Config
+}
+var file_transport_internet_finalmask_header_dtls_config_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_transport_internet_finalmask_header_dtls_config_proto_init() }
+func file_transport_internet_finalmask_header_dtls_config_proto_init() {
+	if File_transport_internet_finalmask_header_dtls_config_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_header_dtls_config_proto_rawDesc), len(file_transport_internet_finalmask_header_dtls_config_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_transport_internet_finalmask_header_dtls_config_proto_goTypes,
+		DependencyIndexes: file_transport_internet_finalmask_header_dtls_config_proto_depIdxs,
+		MessageInfos:      file_transport_internet_finalmask_header_dtls_config_proto_msgTypes,
+	}.Build()
+	File_transport_internet_finalmask_header_dtls_config_proto = out.File
+	file_transport_internet_finalmask_header_dtls_config_proto_goTypes = nil
+	file_transport_internet_finalmask_header_dtls_config_proto_depIdxs = nil
+}
--- a/transport/internet/finalmask/header/dtls/config.proto
+++ b/transport/internet/finalmask/header/dtls/config.proto
@@ -0,0 +1,9 @@
+syntax = "proto3";
+
+package xray.transport.internet.finalmask.header.dtls;
+option csharp_namespace = "Xray.Transport.Internet.Finalmask.Header.Dtls";
+option go_package = "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/dtls";
+option java_package = "com.xray.transport.internet.finalmask.header.dtls";
+option java_multiple_files = true;
+
+message Config {}
--- a/transport/internet/finalmask/header/dtls/conn.go
+++ b/transport/internet/finalmask/header/dtls/conn.go
@@ -0,0 +1,178 @@
+package dtls
+
+import (
+	"io"
+	"net"
+	sync "sync"
+	"time"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common/dice"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
+)
+
+type dtls struct {
+	epoch    uint16
+	length   uint16
+	sequence uint32
+}
+
+func (*dtls) Size() int32 {
+	return 1 + 2 + 2 + 6 + 2
+}
+
+func (h *dtls) Serialize(b []byte) {
+	b[0] = 23
+	b[1] = 254
+	b[2] = 253
+	b[3] = byte(h.epoch >> 8)
+	b[4] = byte(h.epoch)
+	b[5] = 0
+	b[6] = 0
+	b[7] = byte(h.sequence >> 24)
+	b[8] = byte(h.sequence >> 16)
+	b[9] = byte(h.sequence >> 8)
+	b[10] = byte(h.sequence)
+	h.sequence++
+	b[11] = byte(h.length >> 8)
+	b[12] = byte(h.length)
+	h.length += 17
+	if h.length > 100 {
+		h.length -= 50
+	}
+}
+
+type dtlsConn struct {
+	first     bool
+	leaveSize int32
+
+	conn   net.PacketConn
+	header *dtls
+
+	readBuf    []byte
+	readMutex  sync.Mutex
+	writeBuf   []byte
+	writeMutex sync.Mutex
+}
+
+func NewConnClient(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	conn := &dtlsConn{
+		first:     first,
+		leaveSize: leaveSize,
+
+		conn: raw,
+		header: &dtls{
+			epoch:    dice.RollUint16(),
+			sequence: 0,
+			length:   17,
+		},
+	}
+
+	if first {
+		conn.readBuf = make([]byte, 8192)
+		conn.writeBuf = make([]byte, 8192)
+	}
+
+	return conn, nil
+}
+
+func NewConnServer(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *dtlsConn) Size() int32 {
+	return c.header.Size()
+}
+
+func (c *dtlsConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	if c.first {
+		c.readMutex.Lock()
+
+		n, addr, err = c.conn.ReadFrom(c.readBuf)
+		if err != nil {
+			c.readMutex.Unlock()
+			return n, addr, err
+		}
+
+		if n < int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+		}
+
+		if len(p) < n-int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+		}
+
+		copy(p, c.readBuf[c.Size():n])
+
+		c.readMutex.Unlock()
+		return n - int(c.Size()), addr, err
+	}
+
+	n, addr, err = c.conn.ReadFrom(p)
+	if err != nil {
+		return n, addr, err
+	}
+
+	if n < int(c.Size()) {
+		return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+	}
+
+	copy(p, p[c.Size():n])
+
+	return n - int(c.Size()), addr, err
+}
+
+func (c *dtlsConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	if c.first {
+		if c.leaveSize+c.Size()+int32(len(p)) > 8192 {
+			return 0, errors.New("too many masks")
+		}
+
+		c.writeMutex.Lock()
+
+		n = copy(c.writeBuf[c.leaveSize+c.Size():], p)
+		n += int(c.leaveSize) + int(c.Size())
+
+		c.header.Serialize(c.writeBuf[c.leaveSize : c.leaveSize+c.Size()])
+
+		nn, err := c.conn.WriteTo(c.writeBuf[:n], addr)
+
+		if err != nil {
+			c.writeMutex.Unlock()
+			return 0, err
+		}
+
+		if nn != n {
+			c.writeMutex.Unlock()
+			return 0, errors.New("nn != n")
+		}
+
+		c.writeMutex.Unlock()
+		return len(p), nil
+	}
+
+	c.header.Serialize(p[c.leaveSize : c.leaveSize+c.Size()])
+
+	return c.conn.WriteTo(p, addr)
+}
+
+func (c *dtlsConn) Close() error {
+	return c.conn.Close()
+}
+
+func (c *dtlsConn) LocalAddr() net.Addr {
+	return c.conn.LocalAddr()
+}
+
+func (c *dtlsConn) SetDeadline(t time.Time) error {
+	return c.conn.SetDeadline(t)
+}
+
+func (c *dtlsConn) SetReadDeadline(t time.Time) error {
+	return c.conn.SetReadDeadline(t)
+}
+
+func (c *dtlsConn) SetWriteDeadline(t time.Time) error {
+	return c.conn.SetWriteDeadline(t)
+}
--- a/transport/internet/finalmask/header/srtp/config.go
+++ b/transport/internet/finalmask/header/srtp/config.go
@@ -0,0 +1,16 @@
+package srtp
+
+import (
+	"net"
+)
+
+func (c *Config) UDP() {
+}
+
+func (c *Config) WrapPacketConnClient(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *Config) WrapPacketConnServer(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnServer(c, raw, first, leaveSize)
+}
--- a/transport/internet/finalmask/header/srtp/config.pb.go
+++ b/transport/internet/finalmask/header/srtp/config.pb.go
@@ -0,0 +1,114 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.11
+// 	protoc        v3.21.12
+// source: transport/internet/finalmask/header/srtp/config.proto
+
+package srtp
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Config struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Config) Reset() {
+	*x = Config{}
+	mi := &file_transport_internet_finalmask_header_srtp_config_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Config) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Config) ProtoMessage() {}
+
+func (x *Config) ProtoReflect() protoreflect.Message {
+	mi := &file_transport_internet_finalmask_header_srtp_config_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Config.ProtoReflect.Descriptor instead.
+func (*Config) Descriptor() ([]byte, []int) {
+	return file_transport_internet_finalmask_header_srtp_config_proto_rawDescGZIP(), []int{0}
+}
+
+var File_transport_internet_finalmask_header_srtp_config_proto protoreflect.FileDescriptor
+
+const file_transport_internet_finalmask_header_srtp_config_proto_rawDesc = "" +
+	"\n" +
+	"5transport/internet/finalmask/header/srtp/config.proto\x12-xray.transport.internet.finalmask.header.srtp\"\b\n" +
+	"\x06ConfigB\xb8\x01\n" +
+	"1com.xray.transport.internet.finalmask.header.srtpP\x01ZQgithub.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/srtp\xaa\x02-Xray.Transport.Internet.Finalmask.Header.Srtpb\x06proto3"
+
+var (
+	file_transport_internet_finalmask_header_srtp_config_proto_rawDescOnce sync.Once
+	file_transport_internet_finalmask_header_srtp_config_proto_rawDescData []byte
+)
+
+func file_transport_internet_finalmask_header_srtp_config_proto_rawDescGZIP() []byte {
+	file_transport_internet_finalmask_header_srtp_config_proto_rawDescOnce.Do(func() {
+		file_transport_internet_finalmask_header_srtp_config_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_header_srtp_config_proto_rawDesc), len(file_transport_internet_finalmask_header_srtp_config_proto_rawDesc)))
+	})
+	return file_transport_internet_finalmask_header_srtp_config_proto_rawDescData
+}
+
+var file_transport_internet_finalmask_header_srtp_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_transport_internet_finalmask_header_srtp_config_proto_goTypes = []any{
+	(*Config)(nil), // 0: xray.transport.internet.finalmask.header.srtp.Config
+}
+var file_transport_internet_finalmask_header_srtp_config_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_transport_internet_finalmask_header_srtp_config_proto_init() }
+func file_transport_internet_finalmask_header_srtp_config_proto_init() {
+	if File_transport_internet_finalmask_header_srtp_config_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_header_srtp_config_proto_rawDesc), len(file_transport_internet_finalmask_header_srtp_config_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_transport_internet_finalmask_header_srtp_config_proto_goTypes,
+		DependencyIndexes: file_transport_internet_finalmask_header_srtp_config_proto_depIdxs,
+		MessageInfos:      file_transport_internet_finalmask_header_srtp_config_proto_msgTypes,
+	}.Build()
+	File_transport_internet_finalmask_header_srtp_config_proto = out.File
+	file_transport_internet_finalmask_header_srtp_config_proto_goTypes = nil
+	file_transport_internet_finalmask_header_srtp_config_proto_depIdxs = nil
+}
--- a/transport/internet/finalmask/header/srtp/config.proto
+++ b/transport/internet/finalmask/header/srtp/config.proto
@@ -0,0 +1,9 @@
+syntax = "proto3";
+
+package xray.transport.internet.finalmask.header.srtp;
+option csharp_namespace = "Xray.Transport.Internet.Finalmask.Header.Srtp";
+option go_package = "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/srtp";
+option java_package = "com.xray.transport.internet.finalmask.header.srtp";
+option java_multiple_files = true;
+
+message Config {}
--- a/transport/internet/finalmask/header/srtp/conn.go
+++ b/transport/internet/finalmask/header/srtp/conn.go
@@ -0,0 +1,162 @@
+package srtp
+
+import (
+	"encoding/binary"
+	"io"
+	"net"
+	sync "sync"
+	"time"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common/dice"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
+)
+
+type srtp struct {
+	header uint16
+	number uint16
+}
+
+func (*srtp) Size() int32 {
+	return 4
+}
+
+func (h *srtp) Serialize(b []byte) {
+	h.number++
+	binary.BigEndian.PutUint16(b, h.header)
+	binary.BigEndian.PutUint16(b[2:], h.number)
+}
+
+type srtpConn struct {
+	first     bool
+	leaveSize int32
+
+	conn   net.PacketConn
+	header *srtp
+
+	readBuf    []byte
+	readMutex  sync.Mutex
+	writeBuf   []byte
+	writeMutex sync.Mutex
+}
+
+func NewConnClient(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	conn := &srtpConn{
+		first:     first,
+		leaveSize: leaveSize,
+
+		conn: raw,
+		header: &srtp{
+			header: 0xB5E8,
+			number: dice.RollUint16(),
+		},
+	}
+
+	if first {
+		conn.readBuf = make([]byte, 8192)
+		conn.writeBuf = make([]byte, 8192)
+	}
+
+	return conn, nil
+}
+
+func NewConnServer(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *srtpConn) Size() int32 {
+	return c.header.Size()
+}
+
+func (c *srtpConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	if c.first {
+		c.readMutex.Lock()
+
+		n, addr, err = c.conn.ReadFrom(c.readBuf)
+		if err != nil {
+			c.readMutex.Unlock()
+			return n, addr, err
+		}
+
+		if n < int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+		}
+
+		if len(p) < n-int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+		}
+
+		copy(p, c.readBuf[c.Size():n])
+
+		c.readMutex.Unlock()
+		return n - int(c.Size()), addr, err
+	}
+
+	n, addr, err = c.conn.ReadFrom(p)
+	if err != nil {
+		return n, addr, err
+	}
+
+	if n < int(c.Size()) {
+		return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+	}
+
+	copy(p, p[c.Size():n])
+
+	return n - int(c.Size()), addr, err
+}
+
+func (c *srtpConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	if c.first {
+		if c.leaveSize+c.Size()+int32(len(p)) > 8192 {
+			return 0, errors.New("too many masks")
+		}
+
+		c.writeMutex.Lock()
+
+		n = copy(c.writeBuf[c.leaveSize+c.Size():], p)
+		n += int(c.leaveSize) + int(c.Size())
+
+		c.header.Serialize(c.writeBuf[c.leaveSize : c.leaveSize+c.Size()])
+
+		nn, err := c.conn.WriteTo(c.writeBuf[:n], addr)
+
+		if err != nil {
+			c.writeMutex.Unlock()
+			return 0, err
+		}
+
+		if nn != n {
+			c.writeMutex.Unlock()
+			return 0, errors.New("nn != n")
+		}
+
+		c.writeMutex.Unlock()
+		return len(p), nil
+	}
+
+	c.header.Serialize(p[c.leaveSize : c.leaveSize+c.Size()])
+
+	return c.conn.WriteTo(p, addr)
+}
+
+func (c *srtpConn) Close() error {
+	return c.conn.Close()
+}
+
+func (c *srtpConn) LocalAddr() net.Addr {
+	return c.conn.LocalAddr()
+}
+
+func (c *srtpConn) SetDeadline(t time.Time) error {
+	return c.conn.SetDeadline(t)
+}
+
+func (c *srtpConn) SetReadDeadline(t time.Time) error {
+	return c.conn.SetReadDeadline(t)
+}
+
+func (c *srtpConn) SetWriteDeadline(t time.Time) error {
+	return c.conn.SetWriteDeadline(t)
+}
--- a/transport/internet/finalmask/header/utp/config.go
+++ b/transport/internet/finalmask/header/utp/config.go
@@ -0,0 +1,16 @@
+package utp
+
+import (
+	"net"
+)
+
+func (c *Config) UDP() {
+}
+
+func (c *Config) WrapPacketConnClient(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *Config) WrapPacketConnServer(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnServer(c, raw, first, leaveSize)
+}
--- a/transport/internet/finalmask/header/utp/config.pb.go
+++ b/transport/internet/finalmask/header/utp/config.pb.go
@@ -0,0 +1,114 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.11
+// 	protoc        v3.21.12
+// source: transport/internet/finalmask/header/utp/config.proto
+
+package utp
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Config struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Config) Reset() {
+	*x = Config{}
+	mi := &file_transport_internet_finalmask_header_utp_config_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Config) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Config) ProtoMessage() {}
+
+func (x *Config) ProtoReflect() protoreflect.Message {
+	mi := &file_transport_internet_finalmask_header_utp_config_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Config.ProtoReflect.Descriptor instead.
+func (*Config) Descriptor() ([]byte, []int) {
+	return file_transport_internet_finalmask_header_utp_config_proto_rawDescGZIP(), []int{0}
+}
+
+var File_transport_internet_finalmask_header_utp_config_proto protoreflect.FileDescriptor
+
+const file_transport_internet_finalmask_header_utp_config_proto_rawDesc = "" +
+	"\n" +
+	"4transport/internet/finalmask/header/utp/config.proto\x12,xray.transport.internet.finalmask.header.utp\"\b\n" +
+	"\x06ConfigB\xb5\x01\n" +
+	"0com.xray.transport.internet.finalmask.header.utpP\x01ZPgithub.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/utp\xaa\x02,Xray.Transport.Internet.Finalmask.Header.Utpb\x06proto3"
+
+var (
+	file_transport_internet_finalmask_header_utp_config_proto_rawDescOnce sync.Once
+	file_transport_internet_finalmask_header_utp_config_proto_rawDescData []byte
+)
+
+func file_transport_internet_finalmask_header_utp_config_proto_rawDescGZIP() []byte {
+	file_transport_internet_finalmask_header_utp_config_proto_rawDescOnce.Do(func() {
+		file_transport_internet_finalmask_header_utp_config_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_header_utp_config_proto_rawDesc), len(file_transport_internet_finalmask_header_utp_config_proto_rawDesc)))
+	})
+	return file_transport_internet_finalmask_header_utp_config_proto_rawDescData
+}
+
+var file_transport_internet_finalmask_header_utp_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_transport_internet_finalmask_header_utp_config_proto_goTypes = []any{
+	(*Config)(nil), // 0: xray.transport.internet.finalmask.header.utp.Config
+}
+var file_transport_internet_finalmask_header_utp_config_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_transport_internet_finalmask_header_utp_config_proto_init() }
+func file_transport_internet_finalmask_header_utp_config_proto_init() {
+	if File_transport_internet_finalmask_header_utp_config_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_header_utp_config_proto_rawDesc), len(file_transport_internet_finalmask_header_utp_config_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_transport_internet_finalmask_header_utp_config_proto_goTypes,
+		DependencyIndexes: file_transport_internet_finalmask_header_utp_config_proto_depIdxs,
+		MessageInfos:      file_transport_internet_finalmask_header_utp_config_proto_msgTypes,
+	}.Build()
+	File_transport_internet_finalmask_header_utp_config_proto = out.File
+	file_transport_internet_finalmask_header_utp_config_proto_goTypes = nil
+	file_transport_internet_finalmask_header_utp_config_proto_depIdxs = nil
+}
--- a/transport/internet/finalmask/header/utp/config.proto
+++ b/transport/internet/finalmask/header/utp/config.proto
@@ -0,0 +1,9 @@
+syntax = "proto3";
+
+package xray.transport.internet.finalmask.header.utp;
+option csharp_namespace = "Xray.Transport.Internet.Finalmask.Header.Utp";
+option go_package = "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/utp";
+option java_package = "com.xray.transport.internet.finalmask.header.utp";
+option java_multiple_files = true;
+
+message Config {}
--- a/transport/internet/finalmask/header/utp/conn.go
+++ b/transport/internet/finalmask/header/utp/conn.go
@@ -0,0 +1,164 @@
+package utp
+
+import (
+	"encoding/binary"
+	"io"
+	"net"
+	sync "sync"
+	"time"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common/dice"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
+)
+
+type utp struct {
+	header       byte
+	extension    byte
+	connectionID uint16
+}
+
+func (*utp) Size() int32 {
+	return 4
+}
+
+func (h *utp) Serialize(b []byte) {
+	binary.BigEndian.PutUint16(b, h.connectionID)
+	b[2] = h.header
+	b[3] = h.extension
+}
+
+type utpConn struct {
+	first     bool
+	leaveSize int32
+
+	conn   net.PacketConn
+	header *utp
+
+	readBuf    []byte
+	readMutex  sync.Mutex
+	writeBuf   []byte
+	writeMutex sync.Mutex
+}
+
+func NewConnClient(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	conn := &utpConn{
+		first:     first,
+		leaveSize: leaveSize,
+
+		conn: raw,
+		header: &utp{
+			header:       1,
+			extension:    0,
+			connectionID: dice.RollUint16(),
+		},
+	}
+
+	if first {
+		conn.readBuf = make([]byte, 8192)
+		conn.writeBuf = make([]byte, 8192)
+	}
+
+	return conn, nil
+}
+
+func NewConnServer(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *utpConn) Size() int32 {
+	return c.header.Size()
+}
+
+func (c *utpConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	if c.first {
+		c.readMutex.Lock()
+
+		n, addr, err = c.conn.ReadFrom(c.readBuf)
+		if err != nil {
+			c.readMutex.Unlock()
+			return n, addr, err
+		}
+
+		if n < int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+		}
+
+		if len(p) < n-int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+		}
+
+		copy(p, c.readBuf[c.Size():n])
+
+		c.readMutex.Unlock()
+		return n - int(c.Size()), addr, err
+	}
+
+	n, addr, err = c.conn.ReadFrom(p)
+	if err != nil {
+		return n, addr, err
+	}
+
+	if n < int(c.Size()) {
+		return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+	}
+
+	copy(p, p[c.Size():n])
+
+	return n - int(c.Size()), addr, err
+}
+
+func (c *utpConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	if c.first {
+		if c.leaveSize+c.Size()+int32(len(p)) > 8192 {
+			return 0, errors.New("too many masks")
+		}
+
+		c.writeMutex.Lock()
+
+		n = copy(c.writeBuf[c.leaveSize+c.Size():], p)
+		n += int(c.leaveSize) + int(c.Size())
+
+		c.header.Serialize(c.writeBuf[c.leaveSize : c.leaveSize+c.Size()])
+
+		nn, err := c.conn.WriteTo(c.writeBuf[:n], addr)
+
+		if err != nil {
+			c.writeMutex.Unlock()
+			return 0, err
+		}
+
+		if nn != n {
+			c.writeMutex.Unlock()
+			return 0, errors.New("nn != n")
+		}
+
+		c.writeMutex.Unlock()
+		return len(p), nil
+	}
+
+	c.header.Serialize(p[c.leaveSize : c.leaveSize+c.Size()])
+
+	return c.conn.WriteTo(p, addr)
+}
+
+func (c *utpConn) Close() error {
+	return c.conn.Close()
+}
+
+func (c *utpConn) LocalAddr() net.Addr {
+	return c.conn.LocalAddr()
+}
+
+func (c *utpConn) SetDeadline(t time.Time) error {
+	return c.conn.SetDeadline(t)
+}
+
+func (c *utpConn) SetReadDeadline(t time.Time) error {
+	return c.conn.SetReadDeadline(t)
+}
+
+func (c *utpConn) SetWriteDeadline(t time.Time) error {
+	return c.conn.SetWriteDeadline(t)
+}
--- a/transport/internet/finalmask/header/wechat/config.go
+++ b/transport/internet/finalmask/header/wechat/config.go
@@ -0,0 +1,16 @@
+package wechat
+
+import (
+	"net"
+)
+
+func (c *Config) UDP() {
+}
+
+func (c *Config) WrapPacketConnClient(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *Config) WrapPacketConnServer(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnServer(c, raw, first, leaveSize)
+}
--- a/transport/internet/finalmask/header/wechat/config.pb.go
+++ b/transport/internet/finalmask/header/wechat/config.pb.go
@@ -0,0 +1,114 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.11
+// 	protoc        v3.21.12
+// source: transport/internet/finalmask/header/wechat/config.proto
+
+package wechat
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Config struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Config) Reset() {
+	*x = Config{}
+	mi := &file_transport_internet_finalmask_header_wechat_config_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Config) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Config) ProtoMessage() {}
+
+func (x *Config) ProtoReflect() protoreflect.Message {
+	mi := &file_transport_internet_finalmask_header_wechat_config_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Config.ProtoReflect.Descriptor instead.
+func (*Config) Descriptor() ([]byte, []int) {
+	return file_transport_internet_finalmask_header_wechat_config_proto_rawDescGZIP(), []int{0}
+}
+
+var File_transport_internet_finalmask_header_wechat_config_proto protoreflect.FileDescriptor
+
+const file_transport_internet_finalmask_header_wechat_config_proto_rawDesc = "" +
+	"\n" +
+	"7transport/internet/finalmask/header/wechat/config.proto\x12/xray.transport.internet.finalmask.header.wechat\"\b\n" +
+	"\x06ConfigB\xbe\x01\n" +
+	"3com.xray.transport.internet.finalmask.header.wechatP\x01ZSgithub.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/wechat\xaa\x02/Xray.Transport.Internet.Finalmask.Header.Wechatb\x06proto3"
+
+var (
+	file_transport_internet_finalmask_header_wechat_config_proto_rawDescOnce sync.Once
+	file_transport_internet_finalmask_header_wechat_config_proto_rawDescData []byte
+)
+
+func file_transport_internet_finalmask_header_wechat_config_proto_rawDescGZIP() []byte {
+	file_transport_internet_finalmask_header_wechat_config_proto_rawDescOnce.Do(func() {
+		file_transport_internet_finalmask_header_wechat_config_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_header_wechat_config_proto_rawDesc), len(file_transport_internet_finalmask_header_wechat_config_proto_rawDesc)))
+	})
+	return file_transport_internet_finalmask_header_wechat_config_proto_rawDescData
+}
+
+var file_transport_internet_finalmask_header_wechat_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_transport_internet_finalmask_header_wechat_config_proto_goTypes = []any{
+	(*Config)(nil), // 0: xray.transport.internet.finalmask.header.wechat.Config
+}
+var file_transport_internet_finalmask_header_wechat_config_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_transport_internet_finalmask_header_wechat_config_proto_init() }
+func file_transport_internet_finalmask_header_wechat_config_proto_init() {
+	if File_transport_internet_finalmask_header_wechat_config_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_header_wechat_config_proto_rawDesc), len(file_transport_internet_finalmask_header_wechat_config_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_transport_internet_finalmask_header_wechat_config_proto_goTypes,
+		DependencyIndexes: file_transport_internet_finalmask_header_wechat_config_proto_depIdxs,
+		MessageInfos:      file_transport_internet_finalmask_header_wechat_config_proto_msgTypes,
+	}.Build()
+	File_transport_internet_finalmask_header_wechat_config_proto = out.File
+	file_transport_internet_finalmask_header_wechat_config_proto_goTypes = nil
+	file_transport_internet_finalmask_header_wechat_config_proto_depIdxs = nil
+}
--- a/transport/internet/finalmask/header/wechat/config.proto
+++ b/transport/internet/finalmask/header/wechat/config.proto
@@ -0,0 +1,9 @@
+syntax = "proto3";
+
+package xray.transport.internet.finalmask.header.wechat;
+option csharp_namespace = "Xray.Transport.Internet.Finalmask.Header.Wechat";
+option go_package = "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/wechat";
+option java_package = "com.xray.transport.internet.finalmask.header.wechat";
+option java_multiple_files = true;
+
+message Config {}
--- a/transport/internet/finalmask/header/wechat/conn.go
+++ b/transport/internet/finalmask/header/wechat/conn.go
@@ -0,0 +1,168 @@
+package wechat
+
+import (
+	"encoding/binary"
+	"io"
+	"net"
+	sync "sync"
+	"time"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common/dice"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
+)
+
+type wechat struct {
+	sn uint32
+}
+
+func (*wechat) Size() int32 {
+	return 13
+}
+
+func (h *wechat) Serialize(b []byte) {
+	h.sn++
+	b[0] = 0xa1
+	b[1] = 0x08
+	binary.BigEndian.PutUint32(b[2:], h.sn)
+	b[6] = 0x00
+	b[7] = 0x10
+	b[8] = 0x11
+	b[9] = 0x18
+	b[10] = 0x30
+	b[11] = 0x22
+	b[12] = 0x30
+}
+
+type wechatConn struct {
+	first     bool
+	leaveSize int32
+
+	conn   net.PacketConn
+	header *wechat
+
+	readBuf    []byte
+	readMutex  sync.Mutex
+	writeBuf   []byte
+	writeMutex sync.Mutex
+}
+
+func NewConnClient(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	conn := &wechatConn{
+		first:     first,
+		leaveSize: leaveSize,
+
+		conn: raw,
+		header: &wechat{
+			sn: uint32(dice.RollUint16()),
+		},
+	}
+
+	if first {
+		conn.readBuf = make([]byte, 8192)
+		conn.writeBuf = make([]byte, 8192)
+	}
+
+	return conn, nil
+}
+
+func NewConnServer(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *wechatConn) Size() int32 {
+	return c.header.Size()
+}
+
+func (c *wechatConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	if c.first {
+		c.readMutex.Lock()
+
+		n, addr, err = c.conn.ReadFrom(c.readBuf)
+		if err != nil {
+			c.readMutex.Unlock()
+			return n, addr, err
+		}
+
+		if n < int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+		}
+
+		if len(p) < n-int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+		}
+
+		copy(p, c.readBuf[c.Size():n])
+
+		c.readMutex.Unlock()
+		return n - int(c.Size()), addr, err
+	}
+
+	n, addr, err = c.conn.ReadFrom(p)
+	if err != nil {
+		return n, addr, err
+	}
+
+	if n < int(c.Size()) {
+		return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+	}
+
+	copy(p, p[c.Size():n])
+
+	return n - int(c.Size()), addr, err
+}
+
+func (c *wechatConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	if c.first {
+		if c.leaveSize+c.Size()+int32(len(p)) > 8192 {
+			return 0, errors.New("too many masks")
+		}
+
+		c.writeMutex.Lock()
+
+		n = copy(c.writeBuf[c.leaveSize+c.Size():], p)
+		n += int(c.leaveSize) + int(c.Size())
+
+		c.header.Serialize(c.writeBuf[c.leaveSize : c.leaveSize+c.Size()])
+
+		nn, err := c.conn.WriteTo(c.writeBuf[:n], addr)
+
+		if err != nil {
+			c.writeMutex.Unlock()
+			return 0, err
+		}
+
+		if nn != n {
+			c.writeMutex.Unlock()
+			return 0, errors.New("nn != n")
+		}
+
+		c.writeMutex.Unlock()
+		return len(p), nil
+	}
+
+	c.header.Serialize(p[c.leaveSize : c.leaveSize+c.Size()])
+
+	return c.conn.WriteTo(p, addr)
+}
+
+func (c *wechatConn) Close() error {
+	return c.conn.Close()
+}
+
+func (c *wechatConn) LocalAddr() net.Addr {
+	return c.conn.LocalAddr()
+}
+
+func (c *wechatConn) SetDeadline(t time.Time) error {
+	return c.conn.SetDeadline(t)
+}
+
+func (c *wechatConn) SetReadDeadline(t time.Time) error {
+	return c.conn.SetReadDeadline(t)
+}
+
+func (c *wechatConn) SetWriteDeadline(t time.Time) error {
+	return c.conn.SetWriteDeadline(t)
+}
--- a/transport/internet/finalmask/header/wireguard/config.go
+++ b/transport/internet/finalmask/header/wireguard/config.go
@@ -0,0 +1,16 @@
+package wireguard
+
+import (
+	"net"
+)
+
+func (c *Config) UDP() {
+}
+
+func (c *Config) WrapPacketConnClient(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *Config) WrapPacketConnServer(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnServer(c, raw, first, leaveSize)
+}
--- a/transport/internet/finalmask/header/wireguard/config.pb.go
+++ b/transport/internet/finalmask/header/wireguard/config.pb.go
@@ -0,0 +1,114 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.11
+// 	protoc        v3.21.12
+// source: transport/internet/finalmask/header/wireguard/config.proto
+
+package wireguard
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Config struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Config) Reset() {
+	*x = Config{}
+	mi := &file_transport_internet_finalmask_header_wireguard_config_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Config) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Config) ProtoMessage() {}
+
+func (x *Config) ProtoReflect() protoreflect.Message {
+	mi := &file_transport_internet_finalmask_header_wireguard_config_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Config.ProtoReflect.Descriptor instead.
+func (*Config) Descriptor() ([]byte, []int) {
+	return file_transport_internet_finalmask_header_wireguard_config_proto_rawDescGZIP(), []int{0}
+}
+
+var File_transport_internet_finalmask_header_wireguard_config_proto protoreflect.FileDescriptor
+
+const file_transport_internet_finalmask_header_wireguard_config_proto_rawDesc = "" +
+	"\n" +
+	":transport/internet/finalmask/header/wireguard/config.proto\x122xray.transport.internet.finalmask.header.wireguard\"\b\n" +
+	"\x06ConfigB\xc7\x01\n" +
+	"6com.xray.transport.internet.finalmask.header.wireguardP\x01ZVgithub.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/wireguard\xaa\x022Xray.Transport.Internet.Finalmask.Header.Wireguardb\x06proto3"
+
+var (
+	file_transport_internet_finalmask_header_wireguard_config_proto_rawDescOnce sync.Once
+	file_transport_internet_finalmask_header_wireguard_config_proto_rawDescData []byte
+)
+
+func file_transport_internet_finalmask_header_wireguard_config_proto_rawDescGZIP() []byte {
+	file_transport_internet_finalmask_header_wireguard_config_proto_rawDescOnce.Do(func() {
+		file_transport_internet_finalmask_header_wireguard_config_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_header_wireguard_config_proto_rawDesc), len(file_transport_internet_finalmask_header_wireguard_config_proto_rawDesc)))
+	})
+	return file_transport_internet_finalmask_header_wireguard_config_proto_rawDescData
+}
+
+var file_transport_internet_finalmask_header_wireguard_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_transport_internet_finalmask_header_wireguard_config_proto_goTypes = []any{
+	(*Config)(nil), // 0: xray.transport.internet.finalmask.header.wireguard.Config
+}
+var file_transport_internet_finalmask_header_wireguard_config_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_transport_internet_finalmask_header_wireguard_config_proto_init() }
+func file_transport_internet_finalmask_header_wireguard_config_proto_init() {
+	if File_transport_internet_finalmask_header_wireguard_config_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_header_wireguard_config_proto_rawDesc), len(file_transport_internet_finalmask_header_wireguard_config_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_transport_internet_finalmask_header_wireguard_config_proto_goTypes,
+		DependencyIndexes: file_transport_internet_finalmask_header_wireguard_config_proto_depIdxs,
+		MessageInfos:      file_transport_internet_finalmask_header_wireguard_config_proto_msgTypes,
+	}.Build()
+	File_transport_internet_finalmask_header_wireguard_config_proto = out.File
+	file_transport_internet_finalmask_header_wireguard_config_proto_goTypes = nil
+	file_transport_internet_finalmask_header_wireguard_config_proto_depIdxs = nil
+}
--- a/transport/internet/finalmask/header/wireguard/config.proto
+++ b/transport/internet/finalmask/header/wireguard/config.proto
@@ -0,0 +1,9 @@
+syntax = "proto3";
+
+package xray.transport.internet.finalmask.header.wireguard;
+option csharp_namespace = "Xray.Transport.Internet.Finalmask.Header.Wireguard";
+option go_package = "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/wireguard";
+option java_package = "com.xray.transport.internet.finalmask.header.wireguard";
+option java_multiple_files = true;
+
+message Config {}
--- a/transport/internet/finalmask/header/wireguard/conn.go
+++ b/transport/internet/finalmask/header/wireguard/conn.go
@@ -0,0 +1,155 @@
+package wireguard
+
+import (
+	"io"
+	"net"
+	sync "sync"
+	"time"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
+)
+
+type wireguare struct{}
+
+func (*wireguare) Size() int32 {
+	return 4
+}
+
+func (h *wireguare) Serialize(b []byte) {
+	b[0] = 0x04
+	b[1] = 0x00
+	b[2] = 0x00
+	b[3] = 0x00
+}
+
+type wireguareConn struct {
+	first     bool
+	leaveSize int32
+
+	conn   net.PacketConn
+	header *wireguare
+
+	readBuf    []byte
+	readMutex  sync.Mutex
+	writeBuf   []byte
+	writeMutex sync.Mutex
+}
+
+func NewConnClient(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	conn := &wireguareConn{
+		first:     first,
+		leaveSize: leaveSize,
+
+		conn:   raw,
+		header: &wireguare{},
+	}
+
+	if first {
+		conn.readBuf = make([]byte, 8192)
+		conn.writeBuf = make([]byte, 8192)
+	}
+
+	return conn, nil
+}
+
+func NewConnServer(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *wireguareConn) Size() int32 {
+	return c.header.Size()
+}
+
+func (c *wireguareConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	if c.first {
+		c.readMutex.Lock()
+
+		n, addr, err = c.conn.ReadFrom(c.readBuf)
+		if err != nil {
+			c.readMutex.Unlock()
+			return n, addr, err
+		}
+
+		if n < int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+		}
+
+		if len(p) < n-int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+		}
+
+		copy(p, c.readBuf[c.Size():n])
+
+		c.readMutex.Unlock()
+		return n - int(c.Size()), addr, err
+	}
+
+	n, addr, err = c.conn.ReadFrom(p)
+	if err != nil {
+		return n, addr, err
+	}
+
+	if n < int(c.Size()) {
+		return 0, addr, errors.New("header").Base(io.ErrShortBuffer)
+	}
+
+	copy(p, p[c.Size():n])
+
+	return n - int(c.Size()), addr, err
+}
+
+func (c *wireguareConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	if c.first {
+		if c.leaveSize+c.Size()+int32(len(p)) > 8192 {
+			return 0, errors.New("too many masks")
+		}
+
+		c.writeMutex.Lock()
+
+		n = copy(c.writeBuf[c.leaveSize+c.Size():], p)
+		n += int(c.leaveSize) + int(c.Size())
+
+		c.header.Serialize(c.writeBuf[c.leaveSize : c.leaveSize+c.Size()])
+
+		nn, err := c.conn.WriteTo(c.writeBuf[:n], addr)
+
+		if err != nil {
+			c.writeMutex.Unlock()
+			return 0, err
+		}
+
+		if nn != n {
+			c.writeMutex.Unlock()
+			return 0, errors.New("nn != n")
+		}
+
+		c.writeMutex.Unlock()
+		return len(p), nil
+	}
+
+	c.header.Serialize(p[c.leaveSize : c.leaveSize+c.Size()])
+
+	return c.conn.WriteTo(p, addr)
+}
+
+func (c *wireguareConn) Close() error {
+	return c.conn.Close()
+}
+
+func (c *wireguareConn) LocalAddr() net.Addr {
+	return c.conn.LocalAddr()
+}
+
+func (c *wireguareConn) SetDeadline(t time.Time) error {
+	return c.conn.SetDeadline(t)
+}
+
+func (c *wireguareConn) SetReadDeadline(t time.Time) error {
+	return c.conn.SetReadDeadline(t)
+}
+
+func (c *wireguareConn) SetWriteDeadline(t time.Time) error {
+	return c.conn.SetWriteDeadline(t)
+}
--- a/transport/internet/finalmask/mkcp/aes128gcm/aes128gcm_test.go
+++ b/transport/internet/finalmask/mkcp/aes128gcm/aes128gcm_test.go
@@ -0,0 +1,70 @@
+package aes128gcm_test
+
+import (
+	"crypto/rand"
+	"crypto/sha256"
+	"testing"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common/crypto"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAes128GcmSealInPlace(t *testing.T) {
+	hashedPsk := sha256.Sum256([]byte("psk"))
+	aead := crypto.NewAesGcm(hashedPsk[:16])
+
+	text := []byte("0123456789012")
+	buf := make([]byte, 8192)
+
+	nonceSize := aead.NonceSize()
+	nonce := buf[:nonceSize]
+	rand.Read(nonce)
+	copy(buf[nonceSize:], text)
+	plaintext := buf[nonceSize : nonceSize+len(text)]
+
+	sealed := aead.Seal(nil, nonce, plaintext, nil)
+
+	_ = aead.Seal(plaintext[:0], nonce, plaintext, nil)
+
+	assert.Equal(t, sealed, buf[nonceSize:nonceSize+aead.Overhead()+len(text)])
+}
+
+func encrypted(plain []byte) ([]byte, []byte) {
+	hashedPsk := sha256.Sum256([]byte("psk"))
+	aead := crypto.NewAesGcm(hashedPsk[:16])
+
+	nonce := make([]byte, 12)
+	rand.Read(nonce)
+
+	return nonce, aead.Seal(nil, nonce, plain, nil)
+}
+
+func TestAes128GcmOpenInPlace(t *testing.T) {
+	a, b := encrypted([]byte("0123456789012"))
+	buf := make([]byte, 8192)
+	copy(buf, a)
+	copy(buf[len(a):], b)
+
+	hashedPsk := sha256.Sum256([]byte("psk"))
+	aead := crypto.NewAesGcm(hashedPsk[:16])
+
+	nonceSize := aead.NonceSize()
+	nonce := buf[:nonceSize]
+	ciphertext := buf[nonceSize : nonceSize+len(b)]
+
+	opened, _ := aead.Open(nil, nonce, ciphertext, nil)
+	_, _ = aead.Open(ciphertext[:0], nonce, ciphertext, nil)
+
+	assert.Equal(t, opened, ciphertext[:len(ciphertext)-aead.Overhead()])
+}
+
+func TestAes128GcmBounce(t *testing.T) {
+	hashedPsk := sha256.Sum256([]byte("psk"))
+	aead := crypto.NewAesGcm(hashedPsk[:16])
+	buf := make([]byte, aead.NonceSize()+aead.Overhead())
+	for i := 0; i < 1000; i++ {
+		_, _ = rand.Read(buf)
+		_, err := aead.Open(buf[aead.NonceSize():aead.NonceSize()], buf[:aead.NonceSize()], buf[aead.NonceSize():], nil)
+		assert.NotEqual(t, err, nil)
+	}
+}
--- a/transport/internet/finalmask/mkcp/aes128gcm/config.go
+++ b/transport/internet/finalmask/mkcp/aes128gcm/config.go
@@ -0,0 +1,16 @@
+package aes128gcm
+
+import (
+	"net"
+)
+
+func (c *Config) UDP() {
+}
+
+func (c *Config) WrapPacketConnClient(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *Config) WrapPacketConnServer(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnServer(c, raw, first, leaveSize)
+}
--- a/transport/internet/finalmask/mkcp/aes128gcm/config.pb.go
+++ b/transport/internet/finalmask/mkcp/aes128gcm/config.pb.go
@@ -0,0 +1,123 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.11
+// 	protoc        v3.21.12
+// source: transport/internet/finalmask/mkcp/aes128gcm/config.proto
+
+package aes128gcm
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Config struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Password      string                 `protobuf:"bytes,1,opt,name=password,proto3" json:"password,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Config) Reset() {
+	*x = Config{}
+	mi := &file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Config) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Config) ProtoMessage() {}
+
+func (x *Config) ProtoReflect() protoreflect.Message {
+	mi := &file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Config.ProtoReflect.Descriptor instead.
+func (*Config) Descriptor() ([]byte, []int) {
+	return file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Config) GetPassword() string {
+	if x != nil {
+		return x.Password
+	}
+	return ""
+}
+
+var File_transport_internet_finalmask_mkcp_aes128gcm_config_proto protoreflect.FileDescriptor
+
+const file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_rawDesc = "" +
+	"\n" +
+	"8transport/internet/finalmask/mkcp/aes128gcm/config.proto\x120xray.transport.internet.finalmask.mkcp.aes128gcm\"$\n" +
+	"\x06Config\x12\x1a\n" +
+	"\bpassword\x18\x01 \x01(\tR\bpasswordB\xc1\x01\n" +
+	"4com.xray.transport.internet.finalmask.mkcp.aes128gcmP\x01ZTgithub.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/mkcp/aes128gcm\xaa\x020Xray.Transport.Internet.Finalmask.Mkcp.Aes128Gcmb\x06proto3"
+
+var (
+	file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_rawDescOnce sync.Once
+	file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_rawDescData []byte
+)
+
+func file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_rawDescGZIP() []byte {
+	file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_rawDescOnce.Do(func() {
+		file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_rawDesc), len(file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_rawDesc)))
+	})
+	return file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_rawDescData
+}
+
+var file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_goTypes = []any{
+	(*Config)(nil), // 0: xray.transport.internet.finalmask.mkcp.aes128gcm.Config
+}
+var file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_init() }
+func file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_init() {
+	if File_transport_internet_finalmask_mkcp_aes128gcm_config_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_rawDesc), len(file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_goTypes,
+		DependencyIndexes: file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_depIdxs,
+		MessageInfos:      file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_msgTypes,
+	}.Build()
+	File_transport_internet_finalmask_mkcp_aes128gcm_config_proto = out.File
+	file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_goTypes = nil
+	file_transport_internet_finalmask_mkcp_aes128gcm_config_proto_depIdxs = nil
+}
--- a/transport/internet/finalmask/mkcp/aes128gcm/config.proto
+++ b/transport/internet/finalmask/mkcp/aes128gcm/config.proto
@@ -0,0 +1,11 @@
+syntax = "proto3";
+
+package xray.transport.internet.finalmask.mkcp.aes128gcm;
+option csharp_namespace = "Xray.Transport.Internet.Finalmask.Mkcp.Aes128Gcm";
+option go_package = "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/mkcp/aes128gcm";
+option java_package = "com.xray.transport.internet.finalmask.mkcp.aes128gcm";
+option java_multiple_files = true;
+
+message Config {
+    string password = 1;
+}
--- a/transport/internet/finalmask/mkcp/aes128gcm/conn.go
+++ b/transport/internet/finalmask/mkcp/aes128gcm/conn.go
@@ -0,0 +1,174 @@
+package aes128gcm
+
+import (
+	"crypto/cipher"
+	"crypto/rand"
+	"crypto/sha256"
+	"io"
+	"net"
+	sync "sync"
+	"time"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/crypto"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
+)
+
+type aes128gcmConn struct {
+	first     bool
+	leaveSize int32
+
+	conn net.PacketConn
+	aead cipher.AEAD
+
+	readBuf    []byte
+	readMutex  sync.Mutex
+	writeBuf   []byte
+	writeMutex sync.Mutex
+}
+
+func NewConnClient(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	hashedPsk := sha256.Sum256([]byte(c.Password))
+
+	conn := &aes128gcmConn{
+		first:     first,
+		leaveSize: leaveSize,
+
+		conn: raw,
+		aead: crypto.NewAesGcm(hashedPsk[:16]),
+	}
+
+	if first {
+		conn.readBuf = make([]byte, 8192)
+		conn.writeBuf = make([]byte, 8192)
+	}
+
+	return conn, nil
+}
+
+func NewConnServer(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *aes128gcmConn) Size() int32 {
+	return int32(c.aead.NonceSize()) + int32(c.aead.Overhead())
+}
+
+func (c *aes128gcmConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	if c.first {
+		c.readMutex.Lock()
+
+		n, addr, err = c.conn.ReadFrom(c.readBuf)
+		if err != nil {
+			c.readMutex.Unlock()
+			return n, addr, err
+		}
+
+		if n < int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("aead").Base(io.ErrShortBuffer)
+		}
+
+		if len(p) < n-int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("aead").Base(io.ErrShortBuffer)
+		}
+
+		nonceSize := c.aead.NonceSize()
+		nonce := c.readBuf[:nonceSize]
+		ciphertext := c.readBuf[nonceSize:n]
+		_, err = c.aead.Open(p[:0], nonce, ciphertext, nil)
+		if err != nil {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("aead open").Base(err)
+		}
+
+		c.readMutex.Unlock()
+		return n - int(c.Size()), addr, nil
+	}
+
+	n, addr, err = c.conn.ReadFrom(p)
+	if err != nil {
+		return n, addr, err
+	}
+
+	if n < int(c.Size()) {
+		return 0, addr, errors.New("aead").Base(io.ErrShortBuffer)
+	}
+
+	nonceSize := c.aead.NonceSize()
+	nonce := p[:nonceSize]
+	ciphertext := p[nonceSize:n]
+	_, err = c.aead.Open(ciphertext[:0], nonce, ciphertext, nil)
+	if err != nil {
+		return 0, addr, errors.New("aead open").Base(err)
+	}
+	copy(p, p[nonceSize:n-c.aead.Overhead()])
+
+	return n - int(c.Size()), addr, nil
+}
+
+func (c *aes128gcmConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	if c.first {
+		if c.leaveSize+c.Size()+int32(len(p)) > 8192 {
+			return 0, errors.New("too many masks")
+		}
+
+		c.writeMutex.Lock()
+
+		n = copy(c.writeBuf[c.leaveSize+int32(c.aead.NonceSize()):], p)
+		// n = copy(c.writeBuf[c.leaveSize+c.Size():], p)
+		n += int(c.leaveSize) + int(c.Size())
+
+		nonceSize := c.aead.NonceSize()
+		nonce := c.writeBuf[c.leaveSize : c.leaveSize+int32(nonceSize)]
+		common.Must2(rand.Read(nonce))
+		// copy(c.writeBuf[c.leaveSize+int32(nonceSize):], c.writeBuf[c.leaveSize+c.Size():n])
+		plaintext := c.writeBuf[c.leaveSize+int32(nonceSize) : n-c.aead.Overhead()]
+		_ = c.aead.Seal(plaintext[:0], nonce, plaintext, nil)
+
+		nn, err := c.conn.WriteTo(c.writeBuf[:n], addr)
+
+		if err != nil {
+			c.writeMutex.Unlock()
+			return 0, err
+		}
+
+		if nn != n {
+			c.writeMutex.Unlock()
+			return 0, errors.New("nn != n")
+		}
+
+		c.writeMutex.Unlock()
+		return len(p), nil
+	}
+
+	nonceSize := c.aead.NonceSize()
+	nonce := p[c.leaveSize : c.leaveSize+int32(nonceSize)]
+	common.Must2(rand.Read(nonce))
+	copy(p[c.leaveSize+int32(nonceSize):], p[c.leaveSize+c.Size():])
+	plaintext := p[c.leaveSize+int32(nonceSize) : len(p)-c.aead.Overhead()]
+	_ = c.aead.Seal(plaintext[:0], nonce, plaintext, nil)
+
+	return c.conn.WriteTo(p, addr)
+}
+
+func (c *aes128gcmConn) Close() error {
+	return c.conn.Close()
+}
+
+func (c *aes128gcmConn) LocalAddr() net.Addr {
+	return c.conn.LocalAddr()
+}
+
+func (c *aes128gcmConn) SetDeadline(t time.Time) error {
+	return c.conn.SetDeadline(t)
+}
+
+func (c *aes128gcmConn) SetReadDeadline(t time.Time) error {
+	return c.conn.SetReadDeadline(t)
+}
+
+func (c *aes128gcmConn) SetWriteDeadline(t time.Time) error {
+	return c.conn.SetWriteDeadline(t)
+}
--- a/transport/internet/finalmask/mkcp/original/config.go
+++ b/transport/internet/finalmask/mkcp/original/config.go
@@ -0,0 +1,16 @@
+package original
+
+import (
+	"net"
+)
+
+func (c *Config) UDP() {
+}
+
+func (c *Config) WrapPacketConnClient(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *Config) WrapPacketConnServer(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnServer(c, raw, first, leaveSize)
+}
--- a/transport/internet/finalmask/mkcp/original/config.pb.go
+++ b/transport/internet/finalmask/mkcp/original/config.pb.go
@@ -0,0 +1,114 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.11
+// 	protoc        v3.21.12
+// source: transport/internet/finalmask/mkcp/original/config.proto
+
+package original
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Config struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Config) Reset() {
+	*x = Config{}
+	mi := &file_transport_internet_finalmask_mkcp_original_config_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Config) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Config) ProtoMessage() {}
+
+func (x *Config) ProtoReflect() protoreflect.Message {
+	mi := &file_transport_internet_finalmask_mkcp_original_config_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Config.ProtoReflect.Descriptor instead.
+func (*Config) Descriptor() ([]byte, []int) {
+	return file_transport_internet_finalmask_mkcp_original_config_proto_rawDescGZIP(), []int{0}
+}
+
+var File_transport_internet_finalmask_mkcp_original_config_proto protoreflect.FileDescriptor
+
+const file_transport_internet_finalmask_mkcp_original_config_proto_rawDesc = "" +
+	"\n" +
+	"7transport/internet/finalmask/mkcp/original/config.proto\x12/xray.transport.internet.finalmask.mkcp.original\"\b\n" +
+	"\x06ConfigB\xbe\x01\n" +
+	"3com.xray.transport.internet.finalmask.mkcp.originalP\x01ZSgithub.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/mkcp/original\xaa\x02/Xray.Transport.Internet.Finalmask.Mkcp.Originalb\x06proto3"
+
+var (
+	file_transport_internet_finalmask_mkcp_original_config_proto_rawDescOnce sync.Once
+	file_transport_internet_finalmask_mkcp_original_config_proto_rawDescData []byte
+)
+
+func file_transport_internet_finalmask_mkcp_original_config_proto_rawDescGZIP() []byte {
+	file_transport_internet_finalmask_mkcp_original_config_proto_rawDescOnce.Do(func() {
+		file_transport_internet_finalmask_mkcp_original_config_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_mkcp_original_config_proto_rawDesc), len(file_transport_internet_finalmask_mkcp_original_config_proto_rawDesc)))
+	})
+	return file_transport_internet_finalmask_mkcp_original_config_proto_rawDescData
+}
+
+var file_transport_internet_finalmask_mkcp_original_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_transport_internet_finalmask_mkcp_original_config_proto_goTypes = []any{
+	(*Config)(nil), // 0: xray.transport.internet.finalmask.mkcp.original.Config
+}
+var file_transport_internet_finalmask_mkcp_original_config_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_transport_internet_finalmask_mkcp_original_config_proto_init() }
+func file_transport_internet_finalmask_mkcp_original_config_proto_init() {
+	if File_transport_internet_finalmask_mkcp_original_config_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_mkcp_original_config_proto_rawDesc), len(file_transport_internet_finalmask_mkcp_original_config_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_transport_internet_finalmask_mkcp_original_config_proto_goTypes,
+		DependencyIndexes: file_transport_internet_finalmask_mkcp_original_config_proto_depIdxs,
+		MessageInfos:      file_transport_internet_finalmask_mkcp_original_config_proto_msgTypes,
+	}.Build()
+	File_transport_internet_finalmask_mkcp_original_config_proto = out.File
+	file_transport_internet_finalmask_mkcp_original_config_proto_goTypes = nil
+	file_transport_internet_finalmask_mkcp_original_config_proto_depIdxs = nil
+}
--- a/transport/internet/finalmask/mkcp/original/config.proto
+++ b/transport/internet/finalmask/mkcp/original/config.proto
@@ -0,0 +1,9 @@
+syntax = "proto3";
+
+package xray.transport.internet.finalmask.mkcp.original;
+option csharp_namespace = "Xray.Transport.Internet.Finalmask.Mkcp.Original";
+option go_package = "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/mkcp/original";
+option java_package = "com.xray.transport.internet.finalmask.mkcp.original";
+option java_multiple_files = true;
+
+message Config {}
--- a/transport/internet/finalmask/mkcp/original/conn.go
+++ b/transport/internet/finalmask/mkcp/original/conn.go
@@ -0,0 +1,225 @@
+package original
+
+import (
+	"crypto/cipher"
+	"encoding/binary"
+	"hash/fnv"
+	"io"
+	"net"
+	sync "sync"
+	"time"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
+)
+
+type simple struct{}
+
+func NewSimple() *simple {
+	return &simple{}
+}
+
+func (*simple) NonceSize() int {
+	return 0
+}
+
+func (*simple) Overhead() int {
+	return 6
+}
+
+func (a *simple) Seal(dst, nonce, plain, extra []byte) []byte {
+	dst = append(dst, 0, 0, 0, 0, 0, 0)
+	binary.BigEndian.PutUint16(dst[4:], uint16(len(plain)))
+	dst = append(dst, plain...)
+
+	fnvHash := fnv.New32a()
+	common.Must2(fnvHash.Write(dst[4:]))
+	fnvHash.Sum(dst[:0])
+
+	dstLen := len(dst)
+	xtra := 4 - dstLen%4
+	if xtra != 4 {
+		dst = append(dst, make([]byte, xtra)...)
+	}
+	xorfwd(dst)
+	if xtra != 4 {
+		dst = dst[:dstLen]
+	}
+	return dst
+}
+
+func (a *simple) Open(dst, nonce, cipherText, extra []byte) ([]byte, error) {
+	dst = append(dst, cipherText...)
+	dstLen := len(dst)
+	xtra := 4 - dstLen%4
+	if xtra != 4 {
+		dst = append(dst, make([]byte, xtra)...)
+	}
+	xorbkd(dst)
+	if xtra != 4 {
+		dst = dst[:dstLen]
+	}
+
+	fnvHash := fnv.New32a()
+	common.Must2(fnvHash.Write(dst[4:]))
+	if binary.BigEndian.Uint32(dst[:4]) != fnvHash.Sum32() {
+		return nil, errors.New("invalid auth")
+	}
+
+	length := binary.BigEndian.Uint16(dst[4:6])
+	if len(dst)-6 != int(length) {
+		return nil, errors.New("invalid auth")
+	}
+
+	return dst[6:], nil
+}
+
+type simpleConn struct {
+	first     bool
+	leaveSize int32
+
+	conn net.PacketConn
+	aead cipher.AEAD
+
+	readBuf    []byte
+	readMutex  sync.Mutex
+	writeBuf   []byte
+	writeMutex sync.Mutex
+}
+
+func NewConnClient(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	conn := &simpleConn{
+		first:     first,
+		leaveSize: leaveSize,
+
+		conn: raw,
+		aead: &simple{},
+	}
+
+	if first {
+		conn.readBuf = make([]byte, 8192)
+		conn.writeBuf = make([]byte, 8192)
+	}
+
+	return conn, nil
+}
+
+func NewConnServer(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *simpleConn) Size() int32 {
+	return int32(c.aead.NonceSize()) + int32(c.aead.Overhead())
+}
+
+func (c *simpleConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	if c.first {
+		c.readMutex.Lock()
+
+		n, addr, err = c.conn.ReadFrom(c.readBuf)
+		if err != nil {
+			c.readMutex.Unlock()
+			return n, addr, err
+		}
+
+		if n < int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("aead").Base(io.ErrShortBuffer)
+		}
+
+		if len(p) < n-int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("aead").Base(io.ErrShortBuffer)
+		}
+
+		ciphertext := c.readBuf[:n]
+		opened, err := c.aead.Open(nil, nil, ciphertext, nil)
+		if err != nil {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("aead open").Base(err)
+		}
+
+		copy(p, opened)
+
+		c.readMutex.Unlock()
+		return n - int(c.Size()), addr, nil
+	}
+
+	n, addr, err = c.conn.ReadFrom(p)
+	if err != nil {
+		return n, addr, err
+	}
+
+	if n < int(c.Size()) {
+		return 0, addr, errors.New("aead").Base(io.ErrShortBuffer)
+	}
+
+	ciphertext := p[:n]
+	opened, err := c.aead.Open(nil, nil, ciphertext, nil)
+	if err != nil {
+		c.readMutex.Unlock()
+		return 0, addr, errors.New("aead open").Base(err)
+	}
+
+	copy(p, opened)
+
+	return n - int(c.Size()), addr, nil
+}
+
+func (c *simpleConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	if c.first {
+		if c.leaveSize+c.Size()+int32(len(p)) > 8192 {
+			return 0, errors.New("too many masks")
+		}
+
+		c.writeMutex.Lock()
+
+		n = copy(c.writeBuf[c.leaveSize+c.Size():], p)
+		n += int(c.leaveSize) + int(c.Size())
+
+		plaintext := c.writeBuf[c.leaveSize+c.Size() : n]
+		sealed := c.aead.Seal(nil, nil, plaintext, nil)
+		copy(c.writeBuf[c.leaveSize:], sealed)
+
+		nn, err := c.conn.WriteTo(c.writeBuf[:n], addr)
+
+		if err != nil {
+			c.writeMutex.Unlock()
+			return 0, err
+		}
+
+		if nn != n {
+			c.writeMutex.Unlock()
+			return 0, errors.New("nn != n")
+		}
+
+		c.writeMutex.Unlock()
+		return len(p), nil
+	}
+
+	plaintext := p[c.leaveSize+c.Size():]
+	sealed := c.aead.Seal(nil, nil, plaintext, nil)
+	copy(p[c.leaveSize:], sealed)
+
+	return c.conn.WriteTo(p, addr)
+}
+
+func (c *simpleConn) Close() error {
+	return c.conn.Close()
+}
+
+func (c *simpleConn) LocalAddr() net.Addr {
+	return c.conn.LocalAddr()
+}
+
+func (c *simpleConn) SetDeadline(t time.Time) error {
+	return c.conn.SetDeadline(t)
+}
+
+func (c *simpleConn) SetReadDeadline(t time.Time) error {
+	return c.conn.SetReadDeadline(t)
+}
+
+func (c *simpleConn) SetWriteDeadline(t time.Time) error {
+	return c.conn.SetWriteDeadline(t)
+}
--- a/transport/internet/finalmask/mkcp/original/simple_test.go
+++ b/transport/internet/finalmask/mkcp/original/simple_test.go
@@ -0,0 +1,19 @@
+package original_test
+
+import (
+	"crypto/rand"
+	"testing"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/mkcp/original"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestOriginalBounce(t *testing.T) {
+	aead := original.NewSimple()
+	buf := make([]byte, aead.NonceSize()+aead.Overhead())
+	for i := 0; i < 1000; i++ {
+		_, _ = rand.Read(buf)
+		_, err := aead.Open(buf[:0], nil, buf, nil)
+		assert.NotEqual(t, err, nil)
+	}
+}
--- a/transport/internet/finalmask/mkcp/original/xor.go
+++ b/transport/internet/finalmask/mkcp/original/xor.go
@@ -1,7 +1,7 @@
 //go:build !amd64
 // +build !amd64

-package kcp
+package original

 // xorfwd performs XOR forwards in words, x[i] ^= x[i-4], i from 0 to len
 func xorfwd(x []byte) {
--- a/transport/internet/finalmask/mkcp/original/xor_amd64.go
+++ b/transport/internet/finalmask/mkcp/original/xor_amd64.go
@@ -1,4 +1,4 @@
-package kcp
+package original

 //go:noescape
 func xorfwd(x []byte)
--- a/transport/internet/finalmask/mkcp/original/xor_amd64.s
+++ b/transport/internet/finalmask/mkcp/original/xor_amd64.s
--- a/transport/internet/finalmask/salamander/config.go
+++ b/transport/internet/finalmask/salamander/config.go
@@ -2,41 +2,15 @@ package salamander

 import (
 	"net"
-
-	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
-	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/salamander/obfs"
 )

 func (c *Config) UDP() {
 }

-func (c *Config) WrapConnClient(raw net.Conn) (net.Conn, error) {
-	return raw, nil
+func (c *Config) WrapPacketConnClient(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
 }

-func (c *Config) WrapConnServer(raw net.Conn) (net.Conn, error) {
-	return raw, nil
-}
-
-func (c *Config) WrapPacketConnClient(raw net.PacketConn) (net.PacketConn, error) {
-	ob, err := obfs.NewSalamanderObfuscator([]byte(c.Password))
-	if err != nil {
-		return nil, errors.New("salamander err").Base(err)
-	}
-	return obfs.WrapPacketConn(raw, ob), nil
-}
-
-func (c *Config) WrapPacketConnServer(raw net.PacketConn) (net.PacketConn, error) {
-	ob, err := obfs.NewSalamanderObfuscator([]byte(c.Password))
-	if err != nil {
-		return nil, errors.New("salamander err").Base(err)
-	}
-	return obfs.WrapPacketConn(raw, ob), nil
-}
-
-func (c *Config) Size() int {
-	return 0
-}
-
-func (c *Config) Serialize([]byte) {
+func (c *Config) WrapPacketConnServer(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnServer(c, raw, first, leaveSize)
 }
--- a/transport/internet/finalmask/salamander/config.pb.go
+++ b/transport/internet/finalmask/salamander/config.pb.go
@@ -69,10 +69,10 @@ var File_transport_internet_finalmask_salamander_config_proto protoreflect.FileD

 const file_transport_internet_finalmask_salamander_config_proto_rawDesc = "" +
 	"\n" +
-	"4transport/internet/finalmask/salamander/config.proto\x12*xray.transport.internet.udpmask.salamander\"$\n" +
+	"4transport/internet/finalmask/salamander/config.proto\x12,xray.transport.internet.finalmask.salamander\"$\n" +
 	"\x06Config\x12\x1a\n" +
-	"\bpassword\x18\x01 \x01(\tR\bpasswordB\xaf\x01\n" +
-	".com.xray.transport.internet.udpmask.salamanderP\x01ZNgithub.com/amnezia-vpn/amnezia-xray-core/transport/internet/udpmask/salamander\xaa\x02*Xray.Transport.Internet.Udpmask.Salamanderb\x06proto3"
+	"\bpassword\x18\x01 \x01(\tR\bpasswordB\xb5\x01\n" +
+	"0com.xray.transport.internet.finalmask.salamanderP\x01ZPgithub.com/amneiza-vpn/amnezia-xray-core/transport/internet/finalmask/salamander\xaa\x02,Xray.Transport.Internet.Finalmask.Salamanderb\x06proto3"

 var (
 	file_transport_internet_finalmask_salamander_config_proto_rawDescOnce sync.Once
@@ -88,7 +88,7 @@ func file_transport_internet_finalmask_salamander_config_proto_rawDescGZIP() []b

 var file_transport_internet_finalmask_salamander_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
 var file_transport_internet_finalmask_salamander_config_proto_goTypes = []any{
-	(*Config)(nil), // 0: xray.transport.internet.udpmask.salamander.Config
+	(*Config)(nil), // 0: xray.transport.internet.finalmask.salamander.Config
 }
 var file_transport_internet_finalmask_salamander_config_proto_depIdxs = []int32{
 	0, // [0:0] is the sub-list for method output_type
--- a/transport/internet/finalmask/salamander/config.proto
+++ b/transport/internet/finalmask/salamander/config.proto
@@ -1,9 +1,9 @@
 syntax = "proto3";

-package xray.transport.internet.udpmask.salamander;
-option csharp_namespace = "Xray.Transport.Internet.Udpmask.Salamander";
-option go_package = "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/udpmask/salamander";
-option java_package = "com.xray.transport.internet.udpmask.salamander";
+package xray.transport.internet.finalmask.salamander;
+option csharp_namespace = "Xray.Transport.Internet.Finalmask.Salamander";
+option go_package = "github.com/amneiza-vpn/amnezia-xray-core/transport/internet/finalmask/salamander";
+option java_package = "com.xray.transport.internet.finalmask.salamander";
 option java_multiple_files = true;

 message Config {
--- a/transport/internet/finalmask/salamander/conn.go
+++ b/transport/internet/finalmask/salamander/conn.go
@@ -0,0 +1,147 @@
+package salamander
+
+import (
+	"io"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
+)
+
+type obfsPacketConn struct {
+	first     bool
+	leaveSize int32
+
+	conn net.PacketConn
+	obfs *SalamanderObfuscator
+
+	readBuf    []byte
+	readMutex  sync.Mutex
+	writeBuf   []byte
+	writeMutex sync.Mutex
+}
+
+func NewConnClient(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	ob, err := NewSalamanderObfuscator([]byte(c.Password))
+	if err != nil {
+		return nil, errors.New("salamander err").Base(err)
+	}
+
+	conn := &obfsPacketConn{
+		first:     first,
+		leaveSize: leaveSize,
+
+		conn: raw,
+		obfs: ob,
+	}
+
+	if first {
+		conn.readBuf = make([]byte, 8192)
+		conn.writeBuf = make([]byte, 8192)
+	}
+
+	return conn, nil
+}
+
+func NewConnServer(c *Config, raw net.PacketConn, first bool, leaveSize int32) (net.PacketConn, error) {
+	return NewConnClient(c, raw, first, leaveSize)
+}
+
+func (c *obfsPacketConn) Size() int32 {
+	return smSaltLen
+}
+
+func (c *obfsPacketConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	if c.first {
+		c.readMutex.Lock()
+
+		n, addr, err = c.conn.ReadFrom(c.readBuf)
+		if err != nil {
+			c.readMutex.Unlock()
+			return n, addr, err
+		}
+
+		if n < int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("salamander").Base(io.ErrShortBuffer)
+		}
+
+		if len(p) < n-int(c.Size()) {
+			c.readMutex.Unlock()
+			return 0, addr, errors.New("salamander").Base(io.ErrShortBuffer)
+		}
+
+		c.obfs.Deobfuscate(c.readBuf[:n], p)
+
+		c.readMutex.Unlock()
+		return n - int(c.Size()), addr, err
+	}
+
+	n, addr, err = c.conn.ReadFrom(p)
+	if err != nil {
+		return n, addr, err
+	}
+
+	if n < int(c.Size()) {
+		return 0, addr, errors.New("salamander").Base(io.ErrShortBuffer)
+	}
+
+	c.obfs.Deobfuscate(p[:n], p)
+
+	return n - int(c.Size()), addr, err
+}
+
+func (c *obfsPacketConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	if c.first {
+		if c.leaveSize+c.Size()+int32(len(p)) > 8192 {
+			return 0, errors.New("too many masks")
+		}
+
+		c.writeMutex.Lock()
+
+		n = copy(c.writeBuf[c.leaveSize+c.Size():], p)
+		n += int(c.leaveSize) + int(c.Size())
+
+		c.obfs.Obfuscate(c.writeBuf[c.leaveSize+c.Size():n], c.writeBuf[c.leaveSize:n])
+
+		nn, err := c.conn.WriteTo(c.writeBuf[:n], addr)
+
+		if err != nil {
+			c.writeMutex.Unlock()
+			return 0, err
+		}
+
+		if nn != n {
+			c.writeMutex.Unlock()
+			return 0, errors.New("nn != n")
+		}
+
+		c.writeMutex.Unlock()
+		return len(p), nil
+	}
+
+	c.obfs.Obfuscate(p[c.leaveSize+c.Size():], p[c.leaveSize:])
+
+	return c.conn.WriteTo(p, addr)
+}
+
+func (c *obfsPacketConn) Close() error {
+	return c.conn.Close()
+}
+
+func (c *obfsPacketConn) LocalAddr() net.Addr {
+	return c.conn.LocalAddr()
+}
+
+func (c *obfsPacketConn) SetDeadline(t time.Time) error {
+	return c.conn.SetDeadline(t)
+}
+
+func (c *obfsPacketConn) SetReadDeadline(t time.Time) error {
+	return c.conn.SetReadDeadline(t)
+}
+
+func (c *obfsPacketConn) SetWriteDeadline(t time.Time) error {
+	return c.conn.SetWriteDeadline(t)
+}
--- a/transport/internet/finalmask/salamander/obfs/conn.go
+++ b/transport/internet/finalmask/salamander/obfs/conn.go
@@ -1,121 +0,0 @@
-package obfs
-
-import (
-	"net"
-	"sync"
-	"syscall"
-	"time"
-)
-
-const udpBufferSize = 2048 // QUIC packets are at most 1500 bytes long, so 2k should be more than enough
-
-// Obfuscator is the interface that wraps the Obfuscate and Deobfuscate methods.
-// Both methods return the number of bytes written to out.
-// If a packet is not valid, the methods should return 0.
-type Obfuscator interface {
-	Obfuscate(in, out []byte) int
-	Deobfuscate(in, out []byte) int
-}
-
-var _ net.PacketConn = (*obfsPacketConn)(nil)
-
-type obfsPacketConn struct {
-	Conn net.PacketConn
-	Obfs Obfuscator
-
-	readBuf    []byte
-	readMutex  sync.Mutex
-	writeBuf   []byte
-	writeMutex sync.Mutex
-}
-
-// obfsPacketConnUDP is a special case of obfsPacketConn that uses a UDPConn
-// as the underlying connection. We pass additional methods to quic-go to
-// enable UDP-specific optimizations.
-type obfsPacketConnUDP struct {
-	*obfsPacketConn
-	UDPConn *net.UDPConn
-}
-
-// WrapPacketConn enables obfuscation on a net.PacketConn.
-// The obfuscation is transparent to the caller - the n bytes returned by
-// ReadFrom and WriteTo are the number of original bytes, not after
-// obfuscation/deobfuscation.
-func WrapPacketConn(conn net.PacketConn, obfs Obfuscator) net.PacketConn {
-	opc := &obfsPacketConn{
-		Conn:     conn,
-		Obfs:     obfs,
-		readBuf:  make([]byte, udpBufferSize),
-		writeBuf: make([]byte, udpBufferSize),
-	}
-	if udpConn, ok := conn.(*net.UDPConn); ok {
-		return &obfsPacketConnUDP{
-			obfsPacketConn: opc,
-			UDPConn:        udpConn,
-		}
-	} else {
-		return opc
-	}
-}
-
-func (c *obfsPacketConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
-	for {
-		c.readMutex.Lock()
-		n, addr, err = c.Conn.ReadFrom(c.readBuf)
-		if n <= 0 {
-			c.readMutex.Unlock()
-			return n, addr, err
-		}
-		n = c.Obfs.Deobfuscate(c.readBuf[:n], p)
-		c.readMutex.Unlock()
-		if n > 0 || err != nil {
-			return n, addr, err
-		}
-		// Invalid packet, try again
-	}
-}
-
-func (c *obfsPacketConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
-	c.writeMutex.Lock()
-	nn := c.Obfs.Obfuscate(p, c.writeBuf)
-	_, err = c.Conn.WriteTo(c.writeBuf[:nn], addr)
-	c.writeMutex.Unlock()
-	if err == nil {
-		n = len(p)
-	}
-	return n, err
-}
-
-func (c *obfsPacketConn) Close() error {
-	return c.Conn.Close()
-}
-
-func (c *obfsPacketConn) LocalAddr() net.Addr {
-	return c.Conn.LocalAddr()
-}
-
-func (c *obfsPacketConn) SetDeadline(t time.Time) error {
-	return c.Conn.SetDeadline(t)
-}
-
-func (c *obfsPacketConn) SetReadDeadline(t time.Time) error {
-	return c.Conn.SetReadDeadline(t)
-}
-
-func (c *obfsPacketConn) SetWriteDeadline(t time.Time) error {
-	return c.Conn.SetWriteDeadline(t)
-}
-
-// UDP-specific methods below
-
-func (c *obfsPacketConnUDP) SetReadBuffer(bytes int) error {
-	return c.UDPConn.SetReadBuffer(bytes)
-}
-
-func (c *obfsPacketConnUDP) SetWriteBuffer(bytes int) error {
-	return c.UDPConn.SetWriteBuffer(bytes)
-}
-
-func (c *obfsPacketConnUDP) SyscallConn() (syscall.RawConn, error) {
-	return c.UDPConn.SyscallConn()
-}
--- a/transport/internet/finalmask/salamander/obfs/salamander_test.go
+++ b/transport/internet/finalmask/salamander/obfs/salamander_test.go
@@ -1,45 +0,0 @@
-package obfs
-
-import (
-	"crypto/rand"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func BenchmarkSalamanderObfuscator_Obfuscate(b *testing.B) {
-	o, _ := NewSalamanderObfuscator([]byte("average_password"))
-	in := make([]byte, 1200)
-	_, _ = rand.Read(in)
-	out := make([]byte, 2048)
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		o.Obfuscate(in, out)
-	}
-}
-
-func BenchmarkSalamanderObfuscator_Deobfuscate(b *testing.B) {
-	o, _ := NewSalamanderObfuscator([]byte("average_password"))
-	in := make([]byte, 1200)
-	_, _ = rand.Read(in)
-	out := make([]byte, 2048)
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		o.Deobfuscate(in, out)
-	}
-}
-
-func TestSalamanderObfuscator(t *testing.T) {
-	o, _ := NewSalamanderObfuscator([]byte("average_password"))
-	in := make([]byte, 1200)
-	oOut := make([]byte, 2048)
-	dOut := make([]byte, 2048)
-	for i := 0; i < 1000; i++ {
-		_, _ = rand.Read(in)
-		n := o.Obfuscate(in, oOut)
-		assert.Equal(t, len(in)+smSaltLen, n)
-		n = o.Deobfuscate(oOut[:n], dOut)
-		assert.Equal(t, len(in), n)
-		assert.Equal(t, in, dOut[:n])
-	}
-}
--- a/transport/internet/finalmask/salamander/obfs/salamander.go
+++ b/transport/internet/finalmask/salamander/obfs/salamander.go
@@ -1,4 +1,4 @@
-package obfs
+package salamander

 import (
 	"fmt"
@@ -15,8 +15,6 @@ const (
 	smKeyLen    = blake2b.Size256
 )

-var _ Obfuscator = (*SalamanderObfuscator)(nil)
-
 var ErrPSKTooShort = fmt.Errorf("PSK must be at least %d bytes", smPSKMinLen)

 // SalamanderObfuscator is an obfuscator that obfuscates each packet with
--- a/transport/internet/finalmask/salamander/salamander_test.go
+++ b/transport/internet/finalmask/salamander/salamander_test.go
@@ -0,0 +1,81 @@
+package salamander_test
+
+import (
+	"crypto/rand"
+	"testing"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/salamander"
+	"github.com/stretchr/testify/assert"
+)
+
+const (
+	smSaltLen = 8
+)
+
+func BenchmarkSalamanderObfuscator_Obfuscate(b *testing.B) {
+	o, _ := salamander.NewSalamanderObfuscator([]byte("average_password"))
+	in := make([]byte, 1200)
+	_, _ = rand.Read(in)
+	out := make([]byte, 2048)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		o.Obfuscate(in, out)
+	}
+}
+
+func BenchmarkSalamanderObfuscator_Deobfuscate(b *testing.B) {
+	o, _ := salamander.NewSalamanderObfuscator([]byte("average_password"))
+	in := make([]byte, 1200)
+	_, _ = rand.Read(in)
+	out := make([]byte, 2048)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		o.Deobfuscate(in, out)
+	}
+}
+
+func TestSalamanderObfuscator(t *testing.T) {
+	o, _ := salamander.NewSalamanderObfuscator([]byte("average_password"))
+	in := make([]byte, 1200)
+	oOut := make([]byte, 2048)
+	dOut := make([]byte, 2048)
+	for i := 0; i < 1000; i++ {
+		_, _ = rand.Read(in)
+		n := o.Obfuscate(in, oOut)
+		assert.Equal(t, len(in)+smSaltLen, n)
+		n = o.Deobfuscate(oOut[:n], dOut)
+		assert.Equal(t, len(in), n)
+		assert.Equal(t, in, dOut[:n])
+	}
+}
+
+func TestSalamanderInPlace(t *testing.T) {
+	o, _ := salamander.NewSalamanderObfuscator([]byte("average_password"))
+
+	in := make([]byte, 1200)
+	out := make([]byte, 2048)
+	_, _ = rand.Read(in)
+	o.Obfuscate(in, out)
+
+	out2 := make([]byte, 2048)
+	copy(out2[smSaltLen:], in)
+	o.Obfuscate(out2[smSaltLen:], out2)
+
+	dOut := make([]byte, 2048)
+	o.Deobfuscate(out, dOut)
+
+	o.Deobfuscate(out2, out2)
+
+	assert.Equal(t, in, dOut[:1200])
+	assert.Equal(t, in, out2[:1200])
+}
+
+func TestSalamanderBounce(t *testing.T) {
+	o, _ := salamander.NewSalamanderObfuscator([]byte("average_password"))
+	buf := make([]byte, 8)
+	for i := 0; i < 1000; i++ {
+		_, _ = rand.Read(buf)
+		n := o.Deobfuscate(buf, buf)
+		assert.Equal(t, 0, n)
+	}
+}
--- a/transport/internet/finalmask/udp_test.go
+++ b/transport/internet/finalmask/udp_test.go
@@ -0,0 +1,129 @@
+package finalmask_test
+
+import (
+	"bytes"
+	"net"
+	"testing"
+	"time"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/dns"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/srtp"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/utp"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/wechat"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/header/wireguard"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/mkcp/aes128gcm"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/mkcp/original"
+	"github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/salamander"
+)
+
+func mustSendRecv(
+	t *testing.T,
+	from net.PacketConn,
+	to net.PacketConn,
+	msg []byte,
+) {
+	t.Helper()
+
+	go func() {
+		_, err := from.WriteTo(msg, to.LocalAddr())
+		if err != nil {
+			t.Error(err)
+		}
+	}()
+
+	buf := make([]byte, 1024)
+	n, _, err := to.ReadFrom(buf)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if n != len(msg) {
+		t.Fatalf("unexpected size: %d", n)
+	}
+
+	if !bytes.Equal(buf[:n], msg) {
+		t.Fatalf("unexpected data")
+	}
+}
+
+type layerMask struct {
+	name string
+	mask finalmask.Udpmask
+}
+
+func TestPacketConnReadWrite(t *testing.T) {
+	cases := []layerMask{
+		{
+			name: "aes128gcm",
+			mask: &aes128gcm.Config{Password: "123"},
+		},
+		{
+			name: "original",
+			mask: &original.Config{},
+		},
+		{
+			name: "dns",
+			mask: &dns.Config{Domain: "www.baidu.com"},
+		},
+		{
+			name: "srtp",
+			mask: &srtp.Config{},
+		},
+		{
+			name: "utp",
+			mask: &utp.Config{},
+		},
+		{
+			name: "wechat",
+			mask: &wechat.Config{},
+		},
+		{
+			name: "wireguard",
+			mask: &wireguard.Config{},
+		},
+		{
+			name: "salamander",
+			mask: &salamander.Config{Password: "1234"},
+		},
+	}
+
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			mask := c.mask
+
+			maskManager := finalmask.NewUdpmaskManager([]finalmask.Udpmask{mask, mask})
+
+			client, err := net.ListenPacket("udp", "127.0.0.1:0")
+			if err != nil {
+				t.Fatal(err)
+			}
+			defer client.Close()
+
+			client, err = maskManager.WrapPacketConnClient(client)
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			server, err := net.ListenPacket("udp", "127.0.0.1:0")
+			if err != nil {
+				t.Fatal(err)
+			}
+			defer server.Close()
+
+			server, err = maskManager.WrapPacketConnServer(server)
+			if err != nil {
+				t.Fatal(err)
+			}
+
+			_ = client.SetDeadline(time.Now().Add(time.Second))
+			_ = server.SetDeadline(time.Now().Add(time.Second))
+
+			mustSendRecv(t, client, server, []byte("client -> server"))
+			mustSendRecv(t, server, client, []byte("server -> client"))
+
+			mustSendRecv(t, client, server, []byte{})
+			mustSendRecv(t, server, client, []byte{})
+		})
+	}
+}
--- a/transport/internet/finalmask/xdns/client.go
+++ b/transport/internet/finalmask/xdns/client.go
@@ -0,0 +1,373 @@
+package xdns
+
+import (
+	"bytes"
+	"context"
+	"crypto/rand"
+	"encoding/base32"
+	"encoding/binary"
+	"io"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
+)
+
+const (
+	numPadding          = 3
+	numPaddingForPoll   = 8
+	initPollDelay       = 500 * time.Millisecond
+	maxPollDelay        = 10 * time.Second
+	pollDelayMultiplier = 2.0
+	pollLimit           = 16
+)
+
+var base32Encoding = base32.StdEncoding.WithPadding(base32.NoPadding)
+
+type packet struct {
+	p    []byte
+	addr net.Addr
+}
+
+type xdnsConnClient struct {
+	conn net.PacketConn
+
+	clientID []byte
+	domain   Name
+
+	pollChan   chan struct{}
+	readQueue  chan *packet
+	writeQueue chan *packet
+
+	closed bool
+	mutex  sync.Mutex
+}
+
+func NewConnClient(c *Config, raw net.PacketConn, end bool) (net.PacketConn, error) {
+	if !end {
+		return nil, errors.New("xdns requires being at the outermost level")
+	}
+
+	domain, err := ParseName(c.Domain)
+	if err != nil {
+		return nil, err
+	}
+
+	conn := &xdnsConnClient{
+		conn: raw,
+
+		clientID: make([]byte, 8),
+		domain:   domain,
+
+		pollChan:   make(chan struct{}, pollLimit),
+		readQueue:  make(chan *packet, 128),
+		writeQueue: make(chan *packet, 128),
+	}
+
+	rand.Read(conn.clientID)
+
+	go conn.recvLoop()
+	go conn.sendLoop()
+
+	return conn, nil
+}
+
+func (c *xdnsConnClient) recvLoop() {
+	for {
+		if c.closed {
+			break
+		}
+
+		var buf [4096]byte
+
+		n, addr, err := c.conn.ReadFrom(buf[:])
+		if err != nil {
+			continue
+		}
+
+		resp, err := MessageFromWireFormat(buf[:n])
+		if err != nil {
+			continue
+		}
+
+		payload := dnsResponsePayload(&resp, c.domain)
+
+		r := bytes.NewReader(payload)
+		anyPacket := false
+		for {
+			p, err := nextPacket(r)
+			if err != nil {
+				break
+			}
+			anyPacket = true
+
+			buf := make([]byte, len(p))
+			copy(buf, p)
+			select {
+			case c.readQueue <- &packet{
+				p:    buf,
+				addr: addr,
+			}:
+			default:
+			}
+		}
+
+		if anyPacket {
+			select {
+			case c.pollChan <- struct{}{}:
+			default:
+			}
+		}
+	}
+
+	close(c.pollChan)
+	close(c.readQueue)
+}
+
+func (c *xdnsConnClient) sendLoop() {
+	var addr net.Addr
+
+	pollDelay := initPollDelay
+	pollTimer := time.NewTimer(pollDelay)
+	for {
+		var p *packet
+		pollTimerExpired := false
+
+		select {
+		case p = <-c.writeQueue:
+		default:
+			select {
+			case p = <-c.writeQueue:
+			case <-c.pollChan:
+			case <-pollTimer.C:
+				pollTimerExpired = true
+			}
+		}
+
+		if p != nil {
+			addr = p.addr
+
+			select {
+			case <-c.pollChan:
+			default:
+			}
+		} else if addr != nil {
+			encoded, _ := encode(nil, c.clientID, c.domain)
+			p = &packet{
+				p:    encoded,
+				addr: addr,
+			}
+		}
+
+		if pollTimerExpired {
+			pollDelay = time.Duration(float64(pollDelay) * pollDelayMultiplier)
+			if pollDelay > maxPollDelay {
+				pollDelay = maxPollDelay
+			}
+		} else {
+			if !pollTimer.Stop() {
+				<-pollTimer.C
+			}
+			pollDelay = initPollDelay
+		}
+		pollTimer.Reset(pollDelay)
+
+		if c.closed {
+			return
+		}
+
+		if p != nil {
+			_, _ = c.conn.WriteTo(p.p, p.addr)
+		}
+	}
+}
+
+func (c *xdnsConnClient) Size() int32 {
+	return 0
+}
+
+func (c *xdnsConnClient) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	packet, ok := <-c.readQueue
+	if !ok {
+		return 0, nil, io.EOF
+	}
+	n = copy(p, packet.p)
+	if n != len(packet.p) {
+		return 0, nil, io.ErrShortBuffer
+	}
+	return n, packet.addr, nil
+}
+
+func (c *xdnsConnClient) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+
+	if c.closed {
+		return 0, errors.New("xdns closed")
+	}
+
+	encoded, err := encode(p, c.clientID, c.domain)
+	if err != nil {
+		errors.LogDebug(context.Background(), "xdns encode err ", err)
+		return 0, errors.New("xdns encode").Base(err)
+	}
+
+	select {
+	case c.writeQueue <- &packet{
+		p:    encoded,
+		addr: addr,
+	}:
+		return len(p), nil
+	default:
+		return 0, errors.New("xdns queue full")
+	}
+}
+
+func (c *xdnsConnClient) Close() error {
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+
+	if c.closed {
+		return nil
+	}
+
+	c.closed = true
+	close(c.writeQueue)
+
+	return c.conn.Close()
+}
+
+func (c *xdnsConnClient) LocalAddr() net.Addr {
+	return c.conn.LocalAddr()
+}
+
+func (c *xdnsConnClient) SetDeadline(t time.Time) error {
+	return c.conn.SetDeadline(t)
+}
+
+func (c *xdnsConnClient) SetReadDeadline(t time.Time) error {
+	return c.conn.SetReadDeadline(t)
+}
+
+func (c *xdnsConnClient) SetWriteDeadline(t time.Time) error {
+	return c.conn.SetWriteDeadline(t)
+}
+
+func encode(p []byte, clientID []byte, domain Name) ([]byte, error) {
+	var decoded []byte
+	{
+		if len(p) >= 224 {
+			return nil, errors.New("too long")
+		}
+		var buf bytes.Buffer
+		buf.Write(clientID[:])
+		n := numPadding
+		if len(p) == 0 {
+			n = numPaddingForPoll
+		}
+		buf.WriteByte(byte(224 + n))
+		_, _ = io.CopyN(&buf, rand.Reader, int64(n))
+		if len(p) > 0 {
+			buf.WriteByte(byte(len(p)))
+			buf.Write(p)
+		}
+		decoded = buf.Bytes()
+	}
+
+	encoded := make([]byte, base32Encoding.EncodedLen(len(decoded)))
+	base32Encoding.Encode(encoded, decoded)
+	encoded = bytes.ToLower(encoded)
+	labels := chunks(encoded, 63)
+	labels = append(labels, domain...)
+	name, err := NewName(labels)
+	if err != nil {
+		return nil, err
+	}
+
+	var id uint16
+	_ = binary.Read(rand.Reader, binary.BigEndian, &id)
+	query := &Message{
+		ID:    id,
+		Flags: 0x0100,
+		Question: []Question{
+			{
+				Name:  name,
+				Type:  RRTypeTXT,
+				Class: ClassIN,
+			},
+		},
+		Additional: []RR{
+			{
+				Name:  Name{},
+				Type:  RRTypeOPT,
+				Class: 4096,
+				TTL:   0,
+				Data:  []byte{},
+			},
+		},
+	}
+
+	buf, err := query.WireFormat()
+	if err != nil {
+		return nil, err
+	}
+
+	return buf, nil
+}
+
+func chunks(p []byte, n int) [][]byte {
+	var result [][]byte
+	for len(p) > 0 {
+		sz := len(p)
+		if sz > n {
+			sz = n
+		}
+		result = append(result, p[:sz])
+		p = p[sz:]
+	}
+	return result
+}
+
+func nextPacket(r *bytes.Reader) ([]byte, error) {
+	var n uint16
+	err := binary.Read(r, binary.BigEndian, &n)
+	if err != nil {
+		return nil, err
+	}
+	p := make([]byte, n)
+	_, err = io.ReadFull(r, p)
+	if err == io.EOF {
+		err = io.ErrUnexpectedEOF
+	}
+	return p, err
+}
+
+func dnsResponsePayload(resp *Message, domain Name) []byte {
+	if resp.Flags&0x8000 != 0x8000 {
+		return nil
+	}
+	if resp.Flags&0x000f != RcodeNoError {
+		return nil
+	}
+
+	if len(resp.Answer) != 1 {
+		return nil
+	}
+	answer := resp.Answer[0]
+
+	_, ok := answer.Name.TrimSuffix(domain)
+	if !ok {
+		return nil
+	}
+
+	if answer.Type != RRTypeTXT {
+		return nil
+	}
+	payload, err := DecodeRDataTXT(answer.Data)
+	if err != nil {
+		return nil
+	}
+
+	return payload
+}
--- a/transport/internet/finalmask/xdns/config.go
+++ b/transport/internet/finalmask/xdns/config.go
@@ -0,0 +1,16 @@
+package xdns
+
+import (
+	"net"
+)
+
+func (c *Config) UDP() {
+}
+
+func (c *Config) WrapPacketConnClient(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnClient(c, raw, end)
+}
+
+func (c *Config) WrapPacketConnServer(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnServer(c, raw, end)
+}
--- a/transport/internet/finalmask/xdns/config.pb.go
+++ b/transport/internet/finalmask/xdns/config.pb.go
@@ -0,0 +1,123 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.11
+// 	protoc        v3.21.12
+// source: transport/internet/finalmask/xdns/config.proto
+
+package xdns
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Config struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Domain        string                 `protobuf:"bytes,1,opt,name=domain,proto3" json:"domain,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Config) Reset() {
+	*x = Config{}
+	mi := &file_transport_internet_finalmask_xdns_config_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Config) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Config) ProtoMessage() {}
+
+func (x *Config) ProtoReflect() protoreflect.Message {
+	mi := &file_transport_internet_finalmask_xdns_config_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Config.ProtoReflect.Descriptor instead.
+func (*Config) Descriptor() ([]byte, []int) {
+	return file_transport_internet_finalmask_xdns_config_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Config) GetDomain() string {
+	if x != nil {
+		return x.Domain
+	}
+	return ""
+}
+
+var File_transport_internet_finalmask_xdns_config_proto protoreflect.FileDescriptor
+
+const file_transport_internet_finalmask_xdns_config_proto_rawDesc = "" +
+	"\n" +
+	".transport/internet/finalmask/xdns/config.proto\x12&xray.transport.internet.finalmask.xdns\" \n" +
+	"\x06Config\x12\x16\n" +
+	"\x06domain\x18\x01 \x01(\tR\x06domainB\xa3\x01\n" +
+	"*com.xray.transport.internet.finalmask.xdnsP\x01ZJgithub.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/xdns\xaa\x02&Xray.Transport.Internet.Finalmask.Xdnsb\x06proto3"
+
+var (
+	file_transport_internet_finalmask_xdns_config_proto_rawDescOnce sync.Once
+	file_transport_internet_finalmask_xdns_config_proto_rawDescData []byte
+)
+
+func file_transport_internet_finalmask_xdns_config_proto_rawDescGZIP() []byte {
+	file_transport_internet_finalmask_xdns_config_proto_rawDescOnce.Do(func() {
+		file_transport_internet_finalmask_xdns_config_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_xdns_config_proto_rawDesc), len(file_transport_internet_finalmask_xdns_config_proto_rawDesc)))
+	})
+	return file_transport_internet_finalmask_xdns_config_proto_rawDescData
+}
+
+var file_transport_internet_finalmask_xdns_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_transport_internet_finalmask_xdns_config_proto_goTypes = []any{
+	(*Config)(nil), // 0: xray.transport.internet.finalmask.xdns.Config
+}
+var file_transport_internet_finalmask_xdns_config_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_transport_internet_finalmask_xdns_config_proto_init() }
+func file_transport_internet_finalmask_xdns_config_proto_init() {
+	if File_transport_internet_finalmask_xdns_config_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_xdns_config_proto_rawDesc), len(file_transport_internet_finalmask_xdns_config_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_transport_internet_finalmask_xdns_config_proto_goTypes,
+		DependencyIndexes: file_transport_internet_finalmask_xdns_config_proto_depIdxs,
+		MessageInfos:      file_transport_internet_finalmask_xdns_config_proto_msgTypes,
+	}.Build()
+	File_transport_internet_finalmask_xdns_config_proto = out.File
+	file_transport_internet_finalmask_xdns_config_proto_goTypes = nil
+	file_transport_internet_finalmask_xdns_config_proto_depIdxs = nil
+}
--- a/transport/internet/finalmask/xdns/config.proto
+++ b/transport/internet/finalmask/xdns/config.proto
@@ -0,0 +1,12 @@
+syntax = "proto3";
+
+package xray.transport.internet.finalmask.xdns;
+option csharp_namespace = "Xray.Transport.Internet.Finalmask.Xdns";
+option go_package = "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/xdns";
+option java_package = "com.xray.transport.internet.finalmask.xdns";
+option java_multiple_files = true;
+
+message Config {
+  string domain = 1;
+}
+
--- a/transport/internet/finalmask/xdns/dns.go
+++ b/transport/internet/finalmask/xdns/dns.go
@@ -0,0 +1,575 @@
+// Package dns deals with encoding and decoding DNS wire format.
+package xdns
+
+import (
+	"bytes"
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"io"
+	"strings"
+)
+
+// The maximum number of DNS name compression pointers we are willing to follow.
+// Without something like this, infinite loops are possible.
+const compressionPointerLimit = 10
+
+var (
+	// ErrZeroLengthLabel is the error returned for names that contain a
+	// zero-length label, like "example..com".
+	ErrZeroLengthLabel = errors.New("name contains a zero-length label")
+
+	// ErrLabelTooLong is the error returned for labels that are longer than
+	// 63 octets.
+	ErrLabelTooLong = errors.New("name contains a label longer than 63 octets")
+
+	// ErrNameTooLong is the error returned for names whose encoded
+	// representation is longer than 255 octets.
+	ErrNameTooLong = errors.New("name is longer than 255 octets")
+
+	// ErrReservedLabelType is the error returned when reading a label type
+	// prefix whose two most significant bits are not 00 or 11.
+	ErrReservedLabelType = errors.New("reserved label type")
+
+	// ErrTooManyPointers is the error returned when reading a compressed
+	// name that has too many compression pointers.
+	ErrTooManyPointers = errors.New("too many compression pointers")
+
+	// ErrTrailingBytes is the error returned when bytes remain in the parse
+	// buffer after parsing a message.
+	ErrTrailingBytes = errors.New("trailing bytes after message")
+
+	// ErrIntegerOverflow is the error returned when trying to encode an
+	// integer greater than 65535 into a 16-bit field.
+	ErrIntegerOverflow = errors.New("integer overflow")
+)
+
+const (
+	// https://tools.ietf.org/html/rfc1035#section-3.2.2
+	RRTypeTXT = 16
+	// https://tools.ietf.org/html/rfc6891#section-6.1.1
+	RRTypeOPT = 41
+
+	// https://tools.ietf.org/html/rfc1035#section-3.2.4
+	ClassIN = 1
+
+	// https://tools.ietf.org/html/rfc1035#section-4.1.1
+	RcodeNoError        = 0 // a.k.a. NOERROR
+	RcodeFormatError    = 1 // a.k.a. FORMERR
+	RcodeNameError      = 3 // a.k.a. NXDOMAIN
+	RcodeNotImplemented = 4 // a.k.a. NOTIMPL
+	// https://tools.ietf.org/html/rfc6891#section-9
+	ExtendedRcodeBadVers = 16 // a.k.a. BADVERS
+)
+
+// Name represents a domain name, a sequence of labels each of which is 63
+// octets or less in length.
+//
+// https://tools.ietf.org/html/rfc1035#section-3.1
+type Name [][]byte
+
+// NewName returns a Name from a slice of labels, after checking the labels for
+// validity. Does not include a zero-length label at the end of the slice.
+func NewName(labels [][]byte) (Name, error) {
+	name := Name(labels)
+	// https://tools.ietf.org/html/rfc1035#section-2.3.4
+	// Various objects and parameters in the DNS have size limits.
+	//   labels          63 octets or less
+	//   names           255 octets or less
+	for _, label := range labels {
+		if len(label) == 0 {
+			return nil, ErrZeroLengthLabel
+		}
+		if len(label) > 63 {
+			return nil, ErrLabelTooLong
+		}
+	}
+	// Check the total length.
+	builder := newMessageBuilder()
+	builder.WriteName(name)
+	if len(builder.Bytes()) > 255 {
+		return nil, ErrNameTooLong
+	}
+	return name, nil
+}
+
+// ParseName returns a new Name from a string of labels separated by dots, after
+// checking the name for validity. A single dot at the end of the string is
+// ignored.
+func ParseName(s string) (Name, error) {
+	b := bytes.TrimSuffix([]byte(s), []byte("."))
+	if len(b) == 0 {
+		// bytes.Split(b, ".") would return [""] in this case
+		return NewName([][]byte{})
+	} else {
+		return NewName(bytes.Split(b, []byte(".")))
+	}
+}
+
+// String returns a reversible string representation of name. Labels are
+// separated by dots, and any bytes in a label that are outside the set
+// [0-9A-Za-z-] are replaced with a \xXX hex escape sequence.
+func (name Name) String() string {
+	if len(name) == 0 {
+		return "."
+	}
+
+	var buf strings.Builder
+	for i, label := range name {
+		if i > 0 {
+			buf.WriteByte('.')
+		}
+		for _, b := range label {
+			if b == '-' ||
+				('0' <= b && b <= '9') ||
+				('A' <= b && b <= 'Z') ||
+				('a' <= b && b <= 'z') {
+				buf.WriteByte(b)
+			} else {
+				fmt.Fprintf(&buf, "\\x%02x", b)
+			}
+		}
+	}
+	return buf.String()
+}
+
+// TrimSuffix returns a Name with the given suffix removed, if it was present.
+// The second return value indicates whether the suffix was present. If the
+// suffix was not present, the first return value is nil.
+func (name Name) TrimSuffix(suffix Name) (Name, bool) {
+	if len(name) < len(suffix) {
+		return nil, false
+	}
+	split := len(name) - len(suffix)
+	fore, aft := name[:split], name[split:]
+	for i := 0; i < len(aft); i++ {
+		if !bytes.Equal(bytes.ToLower(aft[i]), bytes.ToLower(suffix[i])) {
+			return nil, false
+		}
+	}
+	return fore, true
+}
+
+// Message represents a DNS message.
+//
+// https://tools.ietf.org/html/rfc1035#section-4.1
+type Message struct {
+	ID    uint16
+	Flags uint16
+
+	Question   []Question
+	Answer     []RR
+	Authority  []RR
+	Additional []RR
+}
+
+// Opcode extracts the OPCODE part of the Flags field.
+//
+// https://tools.ietf.org/html/rfc1035#section-4.1.1
+func (message *Message) Opcode() uint16 {
+	return (message.Flags >> 11) & 0xf
+}
+
+// Rcode extracts the RCODE part of the Flags field.
+//
+// https://tools.ietf.org/html/rfc1035#section-4.1.1
+func (message *Message) Rcode() uint16 {
+	return message.Flags & 0x000f
+}
+
+// Question represents an entry in the question section of a message.
+//
+// https://tools.ietf.org/html/rfc1035#section-4.1.2
+type Question struct {
+	Name  Name
+	Type  uint16
+	Class uint16
+}
+
+// RR represents a resource record.
+//
+// https://tools.ietf.org/html/rfc1035#section-4.1.3
+type RR struct {
+	Name  Name
+	Type  uint16
+	Class uint16
+	TTL   uint32
+	Data  []byte
+}
+
+// readName parses a DNS name from r. It leaves r positioned just after the
+// parsed name.
+func readName(r io.ReadSeeker) (Name, error) {
+	var labels [][]byte
+	// We limit the number of compression pointers we are willing to follow.
+	numPointers := 0
+	// If we followed any compression pointers, we must finally seek to just
+	// past the first pointer.
+	var seekTo int64
+loop:
+	for {
+		var labelType byte
+		err := binary.Read(r, binary.BigEndian, &labelType)
+		if err != nil {
+			return nil, err
+		}
+
+		switch labelType & 0xc0 {
+		case 0x00:
+			// This is an ordinary label.
+			// https://tools.ietf.org/html/rfc1035#section-3.1
+			length := int(labelType & 0x3f)
+			if length == 0 {
+				break loop
+			}
+			label := make([]byte, length)
+			_, err := io.ReadFull(r, label)
+			if err != nil {
+				return nil, err
+			}
+			labels = append(labels, label)
+		case 0xc0:
+			// This is a compression pointer.
+			// https://tools.ietf.org/html/rfc1035#section-4.1.4
+			upper := labelType & 0x3f
+			var lower byte
+			err := binary.Read(r, binary.BigEndian, &lower)
+			if err != nil {
+				return nil, err
+			}
+			offset := (uint16(upper) << 8) | uint16(lower)
+
+			if numPointers == 0 {
+				// The first time we encounter a pointer,
+				// remember our position so we can seek back to
+				// it when done.
+				seekTo, err = r.Seek(0, io.SeekCurrent)
+				if err != nil {
+					return nil, err
+				}
+			}
+			numPointers++
+			if numPointers > compressionPointerLimit {
+				return nil, ErrTooManyPointers
+			}
+
+			// Follow the pointer and continue.
+			_, err = r.Seek(int64(offset), io.SeekStart)
+			if err != nil {
+				return nil, err
+			}
+		default:
+			// "The 10 and 01 combinations are reserved for future
+			// use."
+			return nil, ErrReservedLabelType
+		}
+	}
+	// If we followed any pointers, then seek back to just after the first
+	// one.
+	if numPointers > 0 {
+		_, err := r.Seek(seekTo, io.SeekStart)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return NewName(labels)
+}
+
+// readQuestion parses one entry from the Question section. It leaves r
+// positioned just after the parsed entry.
+//
+// https://tools.ietf.org/html/rfc1035#section-4.1.2
+func readQuestion(r io.ReadSeeker) (Question, error) {
+	var question Question
+	var err error
+	question.Name, err = readName(r)
+	if err != nil {
+		return question, err
+	}
+	for _, ptr := range []*uint16{&question.Type, &question.Class} {
+		err := binary.Read(r, binary.BigEndian, ptr)
+		if err != nil {
+			return question, err
+		}
+	}
+
+	return question, nil
+}
+
+// readRR parses one resource record. It leaves r positioned just after the
+// parsed resource record.
+//
+// https://tools.ietf.org/html/rfc1035#section-4.1.3
+func readRR(r io.ReadSeeker) (RR, error) {
+	var rr RR
+	var err error
+	rr.Name, err = readName(r)
+	if err != nil {
+		return rr, err
+	}
+	for _, ptr := range []*uint16{&rr.Type, &rr.Class} {
+		err := binary.Read(r, binary.BigEndian, ptr)
+		if err != nil {
+			return rr, err
+		}
+	}
+	err = binary.Read(r, binary.BigEndian, &rr.TTL)
+	if err != nil {
+		return rr, err
+	}
+	var rdLength uint16
+	err = binary.Read(r, binary.BigEndian, &rdLength)
+	if err != nil {
+		return rr, err
+	}
+	rr.Data = make([]byte, rdLength)
+	_, err = io.ReadFull(r, rr.Data)
+	if err != nil {
+		return rr, err
+	}
+
+	return rr, nil
+}
+
+// readMessage parses a complete DNS message. It leaves r positioned just after
+// the parsed message.
+func readMessage(r io.ReadSeeker) (Message, error) {
+	var message Message
+
+	// Header section
+	// https://tools.ietf.org/html/rfc1035#section-4.1.1
+	var qdCount, anCount, nsCount, arCount uint16
+	for _, ptr := range []*uint16{
+		&message.ID, &message.Flags,
+		&qdCount, &anCount, &nsCount, &arCount,
+	} {
+		err := binary.Read(r, binary.BigEndian, ptr)
+		if err != nil {
+			return message, err
+		}
+	}
+
+	// Question section
+	// https://tools.ietf.org/html/rfc1035#section-4.1.2
+	for i := 0; i < int(qdCount); i++ {
+		question, err := readQuestion(r)
+		if err != nil {
+			return message, err
+		}
+		message.Question = append(message.Question, question)
+	}
+
+	// Answer, Authority, and Additional sections
+	// https://tools.ietf.org/html/rfc1035#section-4.1.3
+	for _, rec := range []struct {
+		ptr   *[]RR
+		count uint16
+	}{
+		{&message.Answer, anCount},
+		{&message.Authority, nsCount},
+		{&message.Additional, arCount},
+	} {
+		for i := 0; i < int(rec.count); i++ {
+			rr, err := readRR(r)
+			if err != nil {
+				return message, err
+			}
+			*rec.ptr = append(*rec.ptr, rr)
+		}
+	}
+
+	return message, nil
+}
+
+// MessageFromWireFormat parses a message from buf and returns a Message object.
+// It returns ErrTrailingBytes if there are bytes remaining in buf after parsing
+// is done.
+func MessageFromWireFormat(buf []byte) (Message, error) {
+	r := bytes.NewReader(buf)
+	message, err := readMessage(r)
+	if err == io.EOF {
+		err = io.ErrUnexpectedEOF
+	} else if err == nil {
+		// Check for trailing bytes.
+		_, err = r.ReadByte()
+		if err == io.EOF {
+			err = nil
+		} else if err == nil {
+			err = ErrTrailingBytes
+		}
+	}
+	return message, err
+}
+
+// messageBuilder manages the state of serializing a DNS message. Its main
+// function is to keep track of names already written for the purpose of name
+// compression.
+type messageBuilder struct {
+	w         bytes.Buffer
+	nameCache map[string]int
+}
+
+// newMessageBuilder creates a new messageBuilder with an empty name cache.
+func newMessageBuilder() *messageBuilder {
+	return &messageBuilder{
+		nameCache: make(map[string]int),
+	}
+}
+
+// Bytes returns the serialized DNS message as a slice of bytes.
+func (builder *messageBuilder) Bytes() []byte {
+	return builder.w.Bytes()
+}
+
+// WriteName appends name to the in-progress messageBuilder, employing
+// compression pointers to previously written names if possible.
+func (builder *messageBuilder) WriteName(name Name) {
+	// https://tools.ietf.org/html/rfc1035#section-3.1
+	for i := range name {
+		// Has this suffix already been encoded in the message?
+		if ptr, ok := builder.nameCache[name[i:].String()]; ok && ptr&0x3fff == ptr {
+			// If so, we can write a compression pointer.
+			binary.Write(&builder.w, binary.BigEndian, uint16(0xc000|ptr))
+			return
+		}
+		// Not cached; we must encode this label verbatim. Store a cache
+		// entry pointing to the beginning of it.
+		builder.nameCache[name[i:].String()] = builder.w.Len()
+		length := len(name[i])
+		if length == 0 || length > 63 {
+			panic(length)
+		}
+		builder.w.WriteByte(byte(length))
+		builder.w.Write(name[i])
+	}
+	builder.w.WriteByte(0)
+}
+
+// WriteQuestion appends a Question section entry to the in-progress
+// messageBuilder.
+func (builder *messageBuilder) WriteQuestion(question *Question) {
+	// https://tools.ietf.org/html/rfc1035#section-4.1.2
+	builder.WriteName(question.Name)
+	binary.Write(&builder.w, binary.BigEndian, question.Type)
+	binary.Write(&builder.w, binary.BigEndian, question.Class)
+}
+
+// WriteRR appends a resource record to the in-progress messageBuilder. It
+// returns ErrIntegerOverflow if the length of rr.Data does not fit in 16 bits.
+func (builder *messageBuilder) WriteRR(rr *RR) error {
+	// https://tools.ietf.org/html/rfc1035#section-4.1.3
+	builder.WriteName(rr.Name)
+	binary.Write(&builder.w, binary.BigEndian, rr.Type)
+	binary.Write(&builder.w, binary.BigEndian, rr.Class)
+	binary.Write(&builder.w, binary.BigEndian, rr.TTL)
+	rdLength := uint16(len(rr.Data))
+	if int(rdLength) != len(rr.Data) {
+		return ErrIntegerOverflow
+	}
+	binary.Write(&builder.w, binary.BigEndian, rdLength)
+	builder.w.Write(rr.Data)
+	return nil
+}
+
+// WriteMessage appends a complete DNS message to the in-progress
+// messageBuilder. It returns ErrIntegerOverflow if the number of entries in any
+// section, or the length of the data in any resource record, does not fit in 16
+// bits.
+func (builder *messageBuilder) WriteMessage(message *Message) error {
+	// Header section
+	// https://tools.ietf.org/html/rfc1035#section-4.1.1
+	binary.Write(&builder.w, binary.BigEndian, message.ID)
+	binary.Write(&builder.w, binary.BigEndian, message.Flags)
+	for _, count := range []int{
+		len(message.Question),
+		len(message.Answer),
+		len(message.Authority),
+		len(message.Additional),
+	} {
+		count16 := uint16(count)
+		if int(count16) != count {
+			return ErrIntegerOverflow
+		}
+		binary.Write(&builder.w, binary.BigEndian, count16)
+	}
+
+	// Question section
+	// https://tools.ietf.org/html/rfc1035#section-4.1.2
+	for _, question := range message.Question {
+		builder.WriteQuestion(&question)
+	}
+
+	// Answer, Authority, and Additional sections
+	// https://tools.ietf.org/html/rfc1035#section-4.1.3
+	for _, rrs := range [][]RR{message.Answer, message.Authority, message.Additional} {
+		for _, rr := range rrs {
+			err := builder.WriteRR(&rr)
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+// WireFormat encodes a Message as a slice of bytes in DNS wire format. It
+// returns ErrIntegerOverflow if the number of entries in any section, or the
+// length of the data in any resource record, does not fit in 16 bits.
+func (message *Message) WireFormat() ([]byte, error) {
+	builder := newMessageBuilder()
+	err := builder.WriteMessage(message)
+	if err != nil {
+		return nil, err
+	}
+	return builder.Bytes(), nil
+}
+
+// DecodeRDataTXT decodes TXT-DATA (as found in the RDATA for a resource record
+// with TYPE=TXT) as a raw byte slice, by concatenating all the
+// <character-string>s it contains.
+//
+// https://tools.ietf.org/html/rfc1035#section-3.3.14
+func DecodeRDataTXT(p []byte) ([]byte, error) {
+	var buf bytes.Buffer
+	for {
+		if len(p) == 0 {
+			return nil, io.ErrUnexpectedEOF
+		}
+		n := int(p[0])
+		p = p[1:]
+		if len(p) < n {
+			return nil, io.ErrUnexpectedEOF
+		}
+		buf.Write(p[:n])
+		p = p[n:]
+		if len(p) == 0 {
+			break
+		}
+	}
+	return buf.Bytes(), nil
+}
+
+// EncodeRDataTXT encodes a slice of bytes as TXT-DATA, as appropriate for the
+// RDATA of a resource record with TYPE=TXT. No length restriction is enforced
+// here; that must be checked at a higher level.
+//
+// https://tools.ietf.org/html/rfc1035#section-3.3.14
+func EncodeRDataTXT(p []byte) []byte {
+	// https://tools.ietf.org/html/rfc1035#section-3.3
+	// https://tools.ietf.org/html/rfc1035#section-3.3.14
+	// TXT data is a sequence of one or more <character-string>s, where
+	// <character-string> is a length octet followed by that number of
+	// octets.
+	var buf bytes.Buffer
+	for len(p) > 255 {
+		buf.WriteByte(255)
+		buf.Write(p[:255])
+		p = p[255:]
+	}
+	// Must write here, even if len(p) == 0, because it's "*one or more*
+	// <character-string>s".
+	buf.WriteByte(byte(len(p)))
+	buf.Write(p)
+	return buf.Bytes()
+}
--- a/transport/internet/finalmask/xdns/dns_test.go
+++ b/transport/internet/finalmask/xdns/dns_test.go
@@ -0,0 +1,592 @@
+package xdns
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+func namesEqual(a, b Name) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	for i := 0; i < len(a); i++ {
+		if !bytes.Equal(a[i], b[i]) {
+			return false
+		}
+	}
+	return true
+}
+
+func TestName(t *testing.T) {
+	for _, test := range []struct {
+		labels [][]byte
+		err    error
+		s      string
+	}{
+		{[][]byte{}, nil, "."},
+		{[][]byte{[]byte("test")}, nil, "test"},
+		{[][]byte{[]byte("a"), []byte("b"), []byte("c")}, nil, "a.b.c"},
+
+		{[][]byte{{}}, ErrZeroLengthLabel, ""},
+		{[][]byte{[]byte("a"), {}, []byte("c")}, ErrZeroLengthLabel, ""},
+
+		// 63 octets.
+		{[][]byte{[]byte("0123456789abcdef0123456789ABCDEF0123456789abcdef0123456789ABCDE")}, nil,
+			"0123456789abcdef0123456789ABCDEF0123456789abcdef0123456789ABCDE"},
+		// 64 octets.
+		{[][]byte{[]byte("0123456789abcdef0123456789ABCDEF0123456789abcdef0123456789ABCDEF")}, ErrLabelTooLong, ""},
+
+		// 64+64+64+62 octets.
+		{[][]byte{
+			[]byte("0123456789abcdef0123456789ABCDEF0123456789abcdef0123456789ABCDE"),
+			[]byte("0123456789abcdef0123456789ABCDEF0123456789abcdef0123456789ABCDE"),
+			[]byte("0123456789abcdef0123456789ABCDEF0123456789abcdef0123456789ABCDE"),
+			[]byte("0123456789abcdef0123456789ABCDEF0123456789abcdef0123456789ABC"),
+		}, nil,
+			"0123456789abcdef0123456789ABCDEF0123456789abcdef0123456789ABCDE.0123456789abcdef0123456789ABCDEF0123456789abcdef0123456789ABCDE.0123456789abcdef0123456789ABCDEF0123456789abcdef0123456789ABCDE.0123456789abcdef0123456789ABCDEF0123456789abcdef0123456789ABC"},
+		// 64+64+64+63 octets.
+		{[][]byte{
+			[]byte("0123456789abcdef0123456789ABCDEF0123456789abcdef0123456789ABCDE"),
+			[]byte("0123456789abcdef0123456789ABCDEF0123456789abcdef0123456789ABCDE"),
+			[]byte("0123456789abcdef0123456789ABCDEF0123456789abcdef0123456789ABCDE"),
+			[]byte("0123456789abcdef0123456789ABCDEF0123456789abcdef0123456789ABCD"),
+		}, ErrNameTooLong, ""},
+		// 127 one-octet labels.
+		{[][]byte{
+			{'0'}, {'1'}, {'2'}, {'3'}, {'4'}, {'5'}, {'6'}, {'7'}, {'8'}, {'9'}, {'a'}, {'b'}, {'c'}, {'d'}, {'e'}, {'f'},
+			{'0'}, {'1'}, {'2'}, {'3'}, {'4'}, {'5'}, {'6'}, {'7'}, {'8'}, {'9'}, {'A'}, {'B'}, {'C'}, {'D'}, {'E'}, {'F'},
+			{'0'}, {'1'}, {'2'}, {'3'}, {'4'}, {'5'}, {'6'}, {'7'}, {'8'}, {'9'}, {'a'}, {'b'}, {'c'}, {'d'}, {'e'}, {'f'},
+			{'0'}, {'1'}, {'2'}, {'3'}, {'4'}, {'5'}, {'6'}, {'7'}, {'8'}, {'9'}, {'A'}, {'B'}, {'C'}, {'D'}, {'E'}, {'F'},
+			{'0'}, {'1'}, {'2'}, {'3'}, {'4'}, {'5'}, {'6'}, {'7'}, {'8'}, {'9'}, {'a'}, {'b'}, {'c'}, {'d'}, {'e'}, {'f'},
+			{'0'}, {'1'}, {'2'}, {'3'}, {'4'}, {'5'}, {'6'}, {'7'}, {'8'}, {'9'}, {'A'}, {'B'}, {'C'}, {'D'}, {'E'}, {'F'},
+			{'0'}, {'1'}, {'2'}, {'3'}, {'4'}, {'5'}, {'6'}, {'7'}, {'8'}, {'9'}, {'a'}, {'b'}, {'c'}, {'d'}, {'e'}, {'f'},
+			{'0'}, {'1'}, {'2'}, {'3'}, {'4'}, {'5'}, {'6'}, {'7'}, {'8'}, {'9'}, {'A'}, {'B'}, {'C'}, {'D'}, {'E'},
+		}, nil,
+			"0.1.2.3.4.5.6.7.8.9.a.b.c.d.e.f.0.1.2.3.4.5.6.7.8.9.A.B.C.D.E.F.0.1.2.3.4.5.6.7.8.9.a.b.c.d.e.f.0.1.2.3.4.5.6.7.8.9.A.B.C.D.E.F.0.1.2.3.4.5.6.7.8.9.a.b.c.d.e.f.0.1.2.3.4.5.6.7.8.9.A.B.C.D.E.F.0.1.2.3.4.5.6.7.8.9.a.b.c.d.e.f.0.1.2.3.4.5.6.7.8.9.A.B.C.D.E"},
+		// 128 one-octet labels.
+		{[][]byte{
+			{'0'}, {'1'}, {'2'}, {'3'}, {'4'}, {'5'}, {'6'}, {'7'}, {'8'}, {'9'}, {'a'}, {'b'}, {'c'}, {'d'}, {'e'}, {'f'},
+			{'0'}, {'1'}, {'2'}, {'3'}, {'4'}, {'5'}, {'6'}, {'7'}, {'8'}, {'9'}, {'A'}, {'B'}, {'C'}, {'D'}, {'E'}, {'F'},
+			{'0'}, {'1'}, {'2'}, {'3'}, {'4'}, {'5'}, {'6'}, {'7'}, {'8'}, {'9'}, {'a'}, {'b'}, {'c'}, {'d'}, {'e'}, {'f'},
+			{'0'}, {'1'}, {'2'}, {'3'}, {'4'}, {'5'}, {'6'}, {'7'}, {'8'}, {'9'}, {'A'}, {'B'}, {'C'}, {'D'}, {'E'}, {'F'},
+			{'0'}, {'1'}, {'2'}, {'3'}, {'4'}, {'5'}, {'6'}, {'7'}, {'8'}, {'9'}, {'a'}, {'b'}, {'c'}, {'d'}, {'e'}, {'f'},
+			{'0'}, {'1'}, {'2'}, {'3'}, {'4'}, {'5'}, {'6'}, {'7'}, {'8'}, {'9'}, {'A'}, {'B'}, {'C'}, {'D'}, {'E'}, {'F'},
+			{'0'}, {'1'}, {'2'}, {'3'}, {'4'}, {'5'}, {'6'}, {'7'}, {'8'}, {'9'}, {'a'}, {'b'}, {'c'}, {'d'}, {'e'}, {'f'},
+			{'0'}, {'1'}, {'2'}, {'3'}, {'4'}, {'5'}, {'6'}, {'7'}, {'8'}, {'9'}, {'A'}, {'B'}, {'C'}, {'D'}, {'E'}, {'F'},
+		}, ErrNameTooLong, ""},
+	} {
+		// Test that NewName returns proper error codes, and otherwise
+		// returns an equal slice of labels.
+		name, err := NewName(test.labels)
+		if err != test.err || (err == nil && !namesEqual(name, test.labels)) {
+			t.Errorf("%+q returned (%+q, %v), expected (%+q, %v)",
+				test.labels, name, err, test.labels, test.err)
+			continue
+		}
+		if test.err != nil {
+			continue
+		}
+
+		// Test that the string version of the name comes out as
+		// expected.
+		s := name.String()
+		if s != test.s {
+			t.Errorf("%+q became string %+q, expected %+q", test.labels, s, test.s)
+			continue
+		}
+
+		// Test that parsing from a string back to a Name results in the
+		// original slice of labels.
+		name, err = ParseName(s)
+		if err != nil || !namesEqual(name, test.labels) {
+			t.Errorf("%+q parsing %+q returned (%+q, %v), expected (%+q, %v)",
+				test.labels, s, name, err, test.labels, nil)
+			continue
+		}
+		// A trailing dot should be ignored.
+		if !strings.HasSuffix(s, ".") {
+			dotName, dotErr := ParseName(s + ".")
+			if dotErr != err || !namesEqual(dotName, name) {
+				t.Errorf("%+q parsing %+q returned (%+q, %v), expected (%+q, %v)",
+					test.labels, s+".", dotName, dotErr, name, err)
+				continue
+			}
+		}
+	}
+}
+
+func TestParseName(t *testing.T) {
+	for _, test := range []struct {
+		s    string
+		name Name
+		err  error
+	}{
+		// This case can't be tested by TestName above because String
+		// will never produce "" (it produces "." instead).
+		{"", [][]byte{}, nil},
+	} {
+		name, err := ParseName(test.s)
+		if err != test.err || (err == nil && !namesEqual(name, test.name)) {
+			t.Errorf("%+q returned (%+q, %v), expected (%+q, %v)",
+				test.s, name, err, test.name, test.err)
+			continue
+		}
+	}
+}
+
+func unescapeString(s string) ([][]byte, error) {
+	if s == "." {
+		return [][]byte{}, nil
+	}
+
+	var result [][]byte
+	for _, label := range strings.Split(s, ".") {
+		var buf bytes.Buffer
+		i := 0
+		for i < len(label) {
+			switch label[i] {
+			case '\\':
+				if i+3 >= len(label) {
+					return nil, fmt.Errorf("truncated escape sequence at index %v", i)
+				}
+				if label[i+1] != 'x' {
+					return nil, fmt.Errorf("malformed escape sequence at index %v", i)
+				}
+				b, err := strconv.ParseUint(string(label[i+2:i+4]), 16, 8)
+				if err != nil {
+					return nil, fmt.Errorf("malformed hex sequence at index %v", i+2)
+				}
+				buf.WriteByte(byte(b))
+				i += 4
+			default:
+				buf.WriteByte(label[i])
+				i++
+			}
+		}
+		result = append(result, buf.Bytes())
+	}
+	return result, nil
+}
+
+func TestNameString(t *testing.T) {
+	for _, test := range []struct {
+		name Name
+		s    string
+	}{
+		{[][]byte{}, "."},
+		{[][]byte{[]byte("\x00"), []byte("a.b"), []byte("c\nd\\")}, "\\x00.a\\x2eb.c\\x0ad\\x5c"},
+		{[][]byte{
+			[]byte("\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f !\"#$%&'()*+,-./0123456789:;<=>"),
+			[]byte("?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}"),
+			[]byte("~\x7f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc"),
+			[]byte("\xbd\xbe\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb"),
+			[]byte("\xfc\xfd\xfe\xff"),
+		}, "\\x00\\x01\\x02\\x03\\x04\\x05\\x06\\x07\\x08\\x09\\x0a\\x0b\\x0c\\x0d\\x0e\\x0f\\x10\\x11\\x12\\x13\\x14\\x15\\x16\\x17\\x18\\x19\\x1a\\x1b\\x1c\\x1d\\x1e\\x1f\\x20\\x21\\x22\\x23\\x24\\x25\\x26\\x27\\x28\\x29\\x2a\\x2b\\x2c-\\x2e\\x2f0123456789\\x3a\\x3b\\x3c\\x3d\\x3e.\\x3f\\x40ABCDEFGHIJKLMNOPQRSTUVWXYZ\\x5b\\x5c\\x5d\\x5e\\x5f\\x60abcdefghijklmnopqrstuvwxyz\\x7b\\x7c\\x7d.\\x7e\\x7f\\x80\\x81\\x82\\x83\\x84\\x85\\x86\\x87\\x88\\x89\\x8a\\x8b\\x8c\\x8d\\x8e\\x8f\\x90\\x91\\x92\\x93\\x94\\x95\\x96\\x97\\x98\\x99\\x9a\\x9b\\x9c\\x9d\\x9e\\x9f\\xa0\\xa1\\xa2\\xa3\\xa4\\xa5\\xa6\\xa7\\xa8\\xa9\\xaa\\xab\\xac\\xad\\xae\\xaf\\xb0\\xb1\\xb2\\xb3\\xb4\\xb5\\xb6\\xb7\\xb8\\xb9\\xba\\xbb\\xbc.\\xbd\\xbe\\xbf\\xc0\\xc1\\xc2\\xc3\\xc4\\xc5\\xc6\\xc7\\xc8\\xc9\\xca\\xcb\\xcc\\xcd\\xce\\xcf\\xd0\\xd1\\xd2\\xd3\\xd4\\xd5\\xd6\\xd7\\xd8\\xd9\\xda\\xdb\\xdc\\xdd\\xde\\xdf\\xe0\\xe1\\xe2\\xe3\\xe4\\xe5\\xe6\\xe7\\xe8\\xe9\\xea\\xeb\\xec\\xed\\xee\\xef\\xf0\\xf1\\xf2\\xf3\\xf4\\xf5\\xf6\\xf7\\xf8\\xf9\\xfa\\xfb.\\xfc\\xfd\\xfe\\xff"},
+	} {
+		s := test.name.String()
+		if s != test.s {
+			t.Errorf("%+q escaped to %+q, expected %+q", test.name, s, test.s)
+			continue
+		}
+		unescaped, err := unescapeString(s)
+		if err != nil {
+			t.Errorf("%+q unescaping %+q resulted in error %v", test.name, s, err)
+			continue
+		}
+		if !namesEqual(Name(unescaped), test.name) {
+			t.Errorf("%+q roundtripped through %+q to %+q", test.name, s, unescaped)
+			continue
+		}
+	}
+}
+
+func TestNameTrimSuffix(t *testing.T) {
+	for _, test := range []struct {
+		name, suffix string
+		trimmed      string
+		ok           bool
+	}{
+		{"", "", ".", true},
+		{".", ".", ".", true},
+		{"abc", "", "abc", true},
+		{"abc", ".", "abc", true},
+		{"", "abc", ".", false},
+		{".", "abc", ".", false},
+		{"example.com", "com", "example", true},
+		{"example.com", "net", ".", false},
+		{"example.com", "example.com", ".", true},
+		{"example.com", "test.com", ".", false},
+		{"example.com", "xample.com", ".", false},
+		{"example.com", "example", ".", false},
+		{"example.com", "COM", "example", true},
+		{"EXAMPLE.COM", "com", "EXAMPLE", true},
+	} {
+		tmp, ok := mustParseName(test.name).TrimSuffix(mustParseName(test.suffix))
+		trimmed := tmp.String()
+		if ok != test.ok || trimmed != test.trimmed {
+			t.Errorf("TrimSuffix %+q %+q returned (%+q, %v), expected (%+q, %v)",
+				test.name, test.suffix, trimmed, ok, test.trimmed, test.ok)
+			continue
+		}
+	}
+}
+
+func TestReadName(t *testing.T) {
+	// Good tests.
+	for _, test := range []struct {
+		start int64
+		end   int64
+		input string
+		s     string
+	}{
+		// Empty name.
+		{0, 1, "\x00abcd", "."},
+		// No pointers.
+		{12, 25, "AAAABBBBCCCC\x07example\x03com\x00", "example.com"},
+		// Backward pointer.
+		{25, 31, "AAAABBBBCCCC\x07example\x03com\x00\x03sub\xc0\x0c", "sub.example.com"},
+		// Forward pointer.
+		{0, 4, "\x01a\xc0\x04\x03bcd\x00", "a.bcd"},
+		// Two backwards pointers.
+		{31, 38, "AAAABBBBCCCC\x07example\x03com\x00\x03sub\xc0\x0c\x04sub2\xc0\x19", "sub2.sub.example.com"},
+		// Forward then backward pointer.
+		{25, 31, "AAAABBBBCCCC\x07example\x03com\x00\x03sub\xc0\x1f\x04sub2\xc0\x0c", "sub.sub2.example.com"},
+		// Overlapping codons.
+		{0, 4, "\x01a\xc0\x03bcd\x00", "a.bcd"},
+		// Pointer to empty label.
+		{0, 10, "\x07example\xc0\x0a\x00", "example"},
+		{1, 11, "\x00\x07example\xc0\x00", "example"},
+		// Pointer to pointer to empty label.
+		{0, 10, "\x07example\xc0\x0a\xc0\x0c\x00", "example"},
+		{1, 11, "\x00\x07example\xc0\x0c\xc0\x00", "example"},
+	} {
+		r := bytes.NewReader([]byte(test.input))
+		_, err := r.Seek(test.start, io.SeekStart)
+		if err != nil {
+			panic(err)
+		}
+		name, err := readName(r)
+		if err != nil {
+			t.Errorf("%+q returned error %s", test.input, err)
+			continue
+		}
+		s := name.String()
+		if s != test.s {
+			t.Errorf("%+q returned %+q, expected %+q", test.input, s, test.s)
+			continue
+		}
+		cur, _ := r.Seek(0, io.SeekCurrent)
+		if cur != test.end {
+			t.Errorf("%+q left offset %d, expected %d", test.input, cur, test.end)
+			continue
+		}
+	}
+
+	// Bad tests.
+	for _, test := range []struct {
+		start int64
+		input string
+		err   error
+	}{
+		{0, "", io.ErrUnexpectedEOF},
+		// Reserved label type.
+		{0, "\x80example", ErrReservedLabelType},
+		// Reserved label type.
+		{0, "\x40example", ErrReservedLabelType},
+		// No Terminating empty label.
+		{0, "\x07example\x03com", io.ErrUnexpectedEOF},
+		// Pointer past end of buffer.
+		{0, "\x07example\xc0\xff", io.ErrUnexpectedEOF},
+		// Pointer to self.
+		{0, "\x07example\x03com\xc0\x0c", ErrTooManyPointers},
+		// Pointer to self with intermediate label.
+		{0, "\x07example\x03com\xc0\x08", ErrTooManyPointers},
+		// Two pointers that point to each other.
+		{0, "\xc0\x02\xc0\x00", ErrTooManyPointers},
+		// Two pointers that point to each other, with intermediate labels.
+		{0, "\x01a\xc0\x04\x01b\xc0\x00", ErrTooManyPointers},
+		// EOF while reading label.
+		{0, "\x0aexample", io.ErrUnexpectedEOF},
+		// EOF before second byte of pointer.
+		{0, "\xc0", io.ErrUnexpectedEOF},
+		{0, "\x07example\xc0", io.ErrUnexpectedEOF},
+	} {
+		r := bytes.NewReader([]byte(test.input))
+		_, err := r.Seek(test.start, io.SeekStart)
+		if err != nil {
+			panic(err)
+		}
+		name, err := readName(r)
+		if err == io.EOF {
+			err = io.ErrUnexpectedEOF
+		}
+		if err != test.err {
+			t.Errorf("%+q returned (%+q, %v), expected %v", test.input, name, err, test.err)
+			continue
+		}
+	}
+}
+
+func mustParseName(s string) Name {
+	name, err := ParseName(s)
+	if err != nil {
+		panic(err)
+	}
+	return name
+}
+
+func questionsEqual(a, b *Question) bool {
+	if !namesEqual(a.Name, b.Name) {
+		return false
+	}
+	if a.Type != b.Type || a.Class != b.Class {
+		return false
+	}
+	return true
+}
+
+func rrsEqual(a, b *RR) bool {
+	if !namesEqual(a.Name, b.Name) {
+		return false
+	}
+	if a.Type != b.Type || a.Class != b.Class || a.TTL != b.TTL {
+		return false
+	}
+	if !bytes.Equal(a.Data, b.Data) {
+		return false
+	}
+	return true
+}
+
+func messagesEqual(a, b *Message) bool {
+	if a.ID != b.ID || a.Flags != b.Flags {
+		return false
+	}
+	if len(a.Question) != len(b.Question) {
+		return false
+	}
+	for i := 0; i < len(a.Question); i++ {
+		if !questionsEqual(&a.Question[i], &b.Question[i]) {
+			return false
+		}
+	}
+	for _, rec := range []struct{ rrA, rrB []RR }{
+		{a.Answer, b.Answer},
+		{a.Authority, b.Authority},
+		{a.Additional, b.Additional},
+	} {
+		if len(rec.rrA) != len(rec.rrB) {
+			return false
+		}
+		for i := 0; i < len(rec.rrA); i++ {
+			if !rrsEqual(&rec.rrA[i], &rec.rrB[i]) {
+				return false
+			}
+		}
+	}
+	return true
+}
+
+func TestMessageFromWireFormat(t *testing.T) {
+	for _, test := range []struct {
+		buf      string
+		expected Message
+		err      error
+	}{
+		{
+			"\x12\x34",
+			Message{},
+			io.ErrUnexpectedEOF,
+		},
+		{
+			"\x12\x34\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x03www\x07example\x03com\x00\x00\x01\x00\x01",
+			Message{
+				ID:    0x1234,
+				Flags: 0x0100,
+				Question: []Question{
+					{
+						Name:  mustParseName("www.example.com"),
+						Type:  1,
+						Class: 1,
+					},
+				},
+				Answer:     []RR{},
+				Authority:  []RR{},
+				Additional: []RR{},
+			},
+			nil,
+		},
+		{
+			"\x12\x34\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x03www\x07example\x03com\x00\x00\x01\x00\x01X",
+			Message{},
+			ErrTrailingBytes,
+		},
+		{
+			"\x12\x34\x81\x80\x00\x01\x00\x01\x00\x00\x00\x00\x03www\x07example\x03com\x00\x00\x01\x00\x01\x03www\x07example\x03com\x00\x00\x01\x00\x01\x00\x00\x00\x80\x00\x04\xc0\x00\x02\x01",
+			Message{
+				ID:    0x1234,
+				Flags: 0x8180,
+				Question: []Question{
+					{
+						Name:  mustParseName("www.example.com"),
+						Type:  1,
+						Class: 1,
+					},
+				},
+				Answer: []RR{
+					{
+						Name:  mustParseName("www.example.com"),
+						Type:  1,
+						Class: 1,
+						TTL:   128,
+						Data:  []byte{192, 0, 2, 1},
+					},
+				},
+				Authority:  []RR{},
+				Additional: []RR{},
+			},
+			nil,
+		},
+	} {
+		message, err := MessageFromWireFormat([]byte(test.buf))
+		if err != test.err || (err == nil && !messagesEqual(&message, &test.expected)) {
+			t.Errorf("%+q\nreturned (%+v, %v)\nexpected (%+v, %v)",
+				test.buf, message, err, test.expected, test.err)
+			continue
+		}
+	}
+}
+
+func TestMessageWireFormatRoundTrip(t *testing.T) {
+	for _, message := range []Message{
+		{
+			ID:    0x1234,
+			Flags: 0x0100,
+			Question: []Question{
+				{
+					Name:  mustParseName("www.example.com"),
+					Type:  1,
+					Class: 1,
+				},
+				{
+					Name:  mustParseName("www2.example.com"),
+					Type:  2,
+					Class: 2,
+				},
+			},
+			Answer: []RR{
+				{
+					Name:  mustParseName("abc"),
+					Type:  2,
+					Class: 3,
+					TTL:   0xffffffff,
+					Data:  []byte{1},
+				},
+				{
+					Name:  mustParseName("xyz"),
+					Type:  2,
+					Class: 3,
+					TTL:   255,
+					Data:  []byte{},
+				},
+			},
+			Authority: []RR{
+				{
+					Name:  mustParseName("."),
+					Type:  65535,
+					Class: 65535,
+					TTL:   0,
+					Data:  []byte("XXXXXXXXXXXXXXXXXXX"),
+				},
+			},
+			Additional: []RR{},
+		},
+	} {
+		buf, err := message.WireFormat()
+		if err != nil {
+			t.Errorf("%+v cannot make wire format: %v", message, err)
+			continue
+		}
+		message2, err := MessageFromWireFormat(buf)
+		if err != nil {
+			t.Errorf("%+q cannot parse wire format: %v", buf, err)
+			continue
+		}
+		if !messagesEqual(&message, &message2) {
+			t.Errorf("messages unequal\nbefore: %+v\n after: %+v", message, message2)
+			continue
+		}
+	}
+}
+
+func TestDecodeRDataTXT(t *testing.T) {
+	for _, test := range []struct {
+		p       []byte
+		decoded []byte
+		err     error
+	}{
+		{[]byte{}, nil, io.ErrUnexpectedEOF},
+		{[]byte("\x00"), []byte{}, nil},
+		{[]byte("\x01"), nil, io.ErrUnexpectedEOF},
+	} {
+		decoded, err := DecodeRDataTXT(test.p)
+		if err != test.err || (err == nil && !bytes.Equal(decoded, test.decoded)) {
+			t.Errorf("%+q\nreturned (%+q, %v)\nexpected (%+q, %v)",
+				test.p, decoded, err, test.decoded, test.err)
+			continue
+		}
+	}
+}
+
+func TestEncodeRDataTXT(t *testing.T) {
+	// Encoding 0 bytes needs to return at least a single length octet of
+	// zero, not an empty slice.
+	p := make([]byte, 0)
+	encoded := EncodeRDataTXT(p)
+	if len(encoded) < 0 {
+		t.Errorf("EncodeRDataTXT(%v) returned %v", p, encoded)
+	}
+
+	// 255 bytes should be able to be encoded into 256 bytes.
+	p = make([]byte, 255)
+	encoded = EncodeRDataTXT(p)
+	if len(encoded) > 256 {
+		t.Errorf("EncodeRDataTXT(%d bytes) returned %d bytes", len(p), len(encoded))
+	}
+}
+
+func TestRDataTXTRoundTrip(t *testing.T) {
+	for _, p := range [][]byte{
+		{},
+		[]byte("\x00"),
+		{
+			0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+			0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+			0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
+			0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
+			0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
+			0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
+			0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
+			0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
+			0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
+			0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
+			0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
+			0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
+			0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
+			0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
+			0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
+			0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
+		},
+	} {
+		rdata := EncodeRDataTXT(p)
+		decoded, err := DecodeRDataTXT(rdata)
+		if err != nil || !bytes.Equal(decoded, p) {
+			t.Errorf("%+q returned (%+q, %v)", p, decoded, err)
+			continue
+		}
+	}
+}
--- a/transport/internet/finalmask/xdns/server.go
+++ b/transport/internet/finalmask/xdns/server.go
@@ -0,0 +1,567 @@
+package xdns
+
+import (
+	"bytes"
+	"context"
+	"encoding/binary"
+	"io"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
+)
+
+const (
+	idleTimeout      = 2 * time.Minute
+	responseTTL      = 60
+	maxResponseDelay = 1 * time.Second
+)
+
+var (
+	maxUDPPayload     = 1280 - 40 - 8
+	maxEncodedPayload = computeMaxEncodedPayload(maxUDPPayload)
+)
+
+func clientIDToAddr(clientID [8]byte) *net.UDPAddr {
+	ip := make(net.IP, 16)
+
+	copy(ip, []byte{0xfd, 0x00, 0, 0, 0, 0, 0, 0})
+	copy(ip[8:], clientID[:])
+
+	return &net.UDPAddr{
+		IP: ip,
+	}
+}
+
+type record struct {
+	Resp *Message
+	Addr net.Addr
+	// ClientID [8]byte
+	ClientAddr net.Addr
+}
+
+type queue struct {
+	lash  time.Time
+	queue chan []byte
+	stash chan []byte
+}
+
+type xdnsConnServer struct {
+	conn net.PacketConn
+
+	domain Name
+
+	ch            chan *record
+	readQueue     chan *packet
+	writeQueueMap map[string]*queue
+
+	closed bool
+	mutex  sync.Mutex
+}
+
+func NewConnServer(c *Config, raw net.PacketConn, end bool) (net.PacketConn, error) {
+	if !end {
+		return nil, errors.New("xdns requires being at the outermost level")
+	}
+
+	domain, err := ParseName(c.Domain)
+	if err != nil {
+		return nil, err
+	}
+
+	conn := &xdnsConnServer{
+		conn: raw,
+
+		domain: domain,
+
+		ch:            make(chan *record, 100),
+		readQueue:     make(chan *packet, 128),
+		writeQueueMap: make(map[string]*queue),
+	}
+
+	go conn.clean()
+	go conn.recvLoop()
+	go conn.sendLoop()
+
+	return conn, nil
+}
+
+func (c *xdnsConnServer) clean() {
+	f := func() bool {
+		c.mutex.Lock()
+		defer c.mutex.Unlock()
+
+		if c.closed {
+			return true
+		}
+
+		now := time.Now()
+
+		for key, q := range c.writeQueueMap {
+			if now.Sub(q.lash) >= idleTimeout {
+				close(q.queue)
+				close(q.stash)
+				delete(c.writeQueueMap, key)
+			}
+		}
+
+		return false
+	}
+
+	for {
+		time.Sleep(idleTimeout / 2)
+		if f() {
+			return
+		}
+	}
+}
+
+func (c *xdnsConnServer) ensureQueue(addr net.Addr) *queue {
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+
+	if c.closed {
+		return nil
+	}
+
+	q, ok := c.writeQueueMap[addr.String()]
+	if !ok {
+		q = &queue{
+			queue: make(chan []byte, 128),
+			stash: make(chan []byte, 1),
+		}
+		c.writeQueueMap[addr.String()] = q
+	}
+	q.lash = time.Now()
+
+	return q
+}
+
+func (c *xdnsConnServer) stash(queue *queue, p []byte) {
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+
+	if c.closed {
+		return
+	}
+
+	select {
+	case queue.stash <- p:
+	default:
+	}
+}
+
+func (c *xdnsConnServer) recvLoop() {
+	for {
+		if c.closed {
+			break
+		}
+
+		var buf [4096]byte
+		n, addr, err := c.conn.ReadFrom(buf[:])
+		if err != nil {
+			continue
+		}
+
+		query, err := MessageFromWireFormat(buf[:n])
+		if err != nil {
+			continue
+		}
+
+		resp, payload := responseFor(&query, c.domain)
+
+		var clientID [8]byte
+		n = copy(clientID[:], payload)
+		payload = payload[n:]
+		if n == len(clientID) {
+			r := bytes.NewReader(payload)
+			for {
+				p, err := nextPacketServer(r)
+				if err != nil {
+					break
+				}
+
+				buf := make([]byte, len(p))
+				copy(buf, p)
+				select {
+				case c.readQueue <- &packet{
+					p:    buf,
+					addr: clientIDToAddr(clientID),
+				}:
+				default:
+				}
+			}
+		} else {
+			if resp != nil && resp.Rcode() == RcodeNoError {
+				resp.Flags |= RcodeNameError
+			}
+		}
+
+		if resp != nil {
+			select {
+			case c.ch <- &record{resp, addr, clientIDToAddr(clientID)}:
+			default:
+			}
+		}
+	}
+
+	close(c.ch)
+	close(c.readQueue)
+}
+
+func (c *xdnsConnServer) sendLoop() {
+	var nextRec *record
+	for {
+		rec := nextRec
+		nextRec = nil
+
+		if rec == nil {
+			var ok bool
+			rec, ok = <-c.ch
+			if !ok {
+				break
+			}
+		}
+
+		if rec.Resp.Rcode() == RcodeNoError && len(rec.Resp.Question) == 1 {
+			rec.Resp.Answer = []RR{
+				{
+					Name:  rec.Resp.Question[0].Name,
+					Type:  rec.Resp.Question[0].Type,
+					Class: rec.Resp.Question[0].Class,
+					TTL:   responseTTL,
+					Data:  nil,
+				},
+			}
+
+			var payload bytes.Buffer
+			limit := maxEncodedPayload
+			timer := time.NewTimer(maxResponseDelay)
+			for {
+				queue := c.ensureQueue(rec.ClientAddr)
+				if queue == nil {
+					return
+				}
+
+				var p []byte
+
+				select {
+				case p = <-queue.stash:
+				default:
+					select {
+					case p = <-queue.stash:
+					case p = <-queue.queue:
+					default:
+						select {
+						case p = <-queue.stash:
+						case p = <-queue.queue:
+						case <-timer.C:
+						case nextRec = <-c.ch:
+						}
+					}
+				}
+
+				timer.Reset(0)
+
+				if len(p) == 0 {
+					break
+				}
+
+				limit -= 2 + len(p)
+				if payload.Len() == 0 {
+
+				} else if limit < 0 {
+					c.stash(queue, p)
+
+					break
+				}
+
+				if int(uint16(len(p))) != len(p) {
+					panic(len(p))
+				}
+
+				_ = binary.Write(&payload, binary.BigEndian, uint16(len(p)))
+				payload.Write(p)
+			}
+			timer.Stop()
+
+			rec.Resp.Answer[0].Data = EncodeRDataTXT(payload.Bytes())
+		}
+
+		buf, err := rec.Resp.WireFormat()
+		if err != nil {
+			continue
+		}
+
+		if len(buf) > maxUDPPayload {
+			errors.LogDebug(context.Background(), "xdns server truncate ", len(buf))
+			buf = buf[:maxUDPPayload]
+			buf[2] |= 0x02
+		}
+
+		if c.closed {
+			return
+		}
+
+		_, _ = c.conn.WriteTo(buf, rec.Addr)
+	}
+}
+
+func (c *xdnsConnServer) Size() int32 {
+	return 0
+}
+
+func (c *xdnsConnServer) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	packet, ok := <-c.readQueue
+	if !ok {
+		return 0, nil, io.EOF
+	}
+	n = copy(p, packet.p)
+	if n != len(packet.p) {
+		return 0, nil, io.ErrShortBuffer
+	}
+	return n, packet.addr, nil
+}
+
+func (c *xdnsConnServer) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	q := c.ensureQueue(addr)
+	if q == nil {
+		return 0, errors.New("xdns closed")
+	}
+
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+
+	if c.closed {
+		return 0, errors.New("xdns closed")
+	}
+
+	buf := make([]byte, len(p))
+	copy(buf, p)
+
+	select {
+	case q.queue <- buf:
+		return len(p), nil
+	default:
+		return 0, errors.New("xdns queue full")
+	}
+}
+
+func (c *xdnsConnServer) Close() error {
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+
+	if c.closed {
+		return nil
+	}
+
+	c.closed = true
+	for key, q := range c.writeQueueMap {
+		close(q.queue)
+		close(q.stash)
+		delete(c.writeQueueMap, key)
+	}
+
+	return c.conn.Close()
+}
+
+func (c *xdnsConnServer) LocalAddr() net.Addr {
+	return c.conn.LocalAddr()
+}
+
+func (c *xdnsConnServer) SetDeadline(t time.Time) error {
+	return c.conn.SetDeadline(t)
+}
+
+func (c *xdnsConnServer) SetReadDeadline(t time.Time) error {
+	return c.conn.SetReadDeadline(t)
+}
+
+func (c *xdnsConnServer) SetWriteDeadline(t time.Time) error {
+	return c.conn.SetWriteDeadline(t)
+}
+
+func nextPacketServer(r *bytes.Reader) ([]byte, error) {
+	eof := func(err error) error {
+		if err == io.EOF {
+			err = io.ErrUnexpectedEOF
+		}
+		return err
+	}
+
+	for {
+		prefix, err := r.ReadByte()
+		if err != nil {
+			return nil, err
+		}
+		if prefix >= 224 {
+			paddingLen := prefix - 224
+			_, err := io.CopyN(io.Discard, r, int64(paddingLen))
+			if err != nil {
+				return nil, eof(err)
+			}
+		} else {
+			p := make([]byte, int(prefix))
+			_, err = io.ReadFull(r, p)
+			return p, eof(err)
+		}
+	}
+}
+
+func responseFor(query *Message, domain Name) (*Message, []byte) {
+	resp := &Message{
+		ID:       query.ID,
+		Flags:    0x8000,
+		Question: query.Question,
+	}
+
+	if query.Flags&0x8000 != 0 {
+		return nil, nil
+	}
+
+	payloadSize := 0
+	for _, rr := range query.Additional {
+		if rr.Type != RRTypeOPT {
+			continue
+		}
+		if len(resp.Additional) != 0 {
+			resp.Flags |= RcodeFormatError
+			return resp, nil
+		}
+		resp.Additional = append(resp.Additional, RR{
+			Name:  Name{},
+			Type:  RRTypeOPT,
+			Class: 4096,
+			TTL:   0,
+			Data:  []byte{},
+		})
+		additional := &resp.Additional[0]
+
+		version := (rr.TTL >> 16) & 0xff
+		if version != 0 {
+			resp.Flags |= ExtendedRcodeBadVers & 0xf
+			additional.TTL = (ExtendedRcodeBadVers >> 4) << 24
+			return resp, nil
+		}
+
+		payloadSize = int(rr.Class)
+	}
+	if payloadSize < 512 {
+		payloadSize = 512
+	}
+
+	if len(query.Question) != 1 {
+		resp.Flags |= RcodeFormatError
+		return resp, nil
+	}
+	question := query.Question[0]
+
+	prefix, ok := question.Name.TrimSuffix(domain)
+	if !ok {
+		resp.Flags |= RcodeNameError
+		return resp, nil
+	}
+	resp.Flags |= 0x0400
+
+	if query.Opcode() != 0 {
+		resp.Flags |= RcodeNotImplemented
+		return resp, nil
+	}
+
+	if question.Type != RRTypeTXT {
+		resp.Flags |= RcodeNameError
+		return resp, nil
+	}
+
+	encoded := bytes.ToUpper(bytes.Join(prefix, nil))
+	payload := make([]byte, base32Encoding.DecodedLen(len(encoded)))
+	n, err := base32Encoding.Decode(payload, encoded)
+	if err != nil {
+		resp.Flags |= RcodeNameError
+		return resp, nil
+	}
+	payload = payload[:n]
+
+	if payloadSize < maxUDPPayload {
+		resp.Flags |= RcodeFormatError
+		return resp, nil
+	}
+
+	return resp, payload
+}
+
+func computeMaxEncodedPayload(limit int) int {
+	maxLengthName, err := NewName([][]byte{
+		[]byte("AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"),
+		[]byte("AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"),
+		[]byte("AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"),
+		[]byte("AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"),
+	})
+	if err != nil {
+		panic(err)
+	}
+	{
+		n := 0
+		for _, label := range maxLengthName {
+			n += len(label) + 1
+		}
+		n += 1
+		if n != 255 {
+			panic("computeMaxEncodedPayload n != 255")
+		}
+	}
+
+	queryLimit := uint16(limit)
+	if int(queryLimit) != limit {
+		queryLimit = 0xffff
+	}
+	query := &Message{
+		Question: []Question{
+			{
+				Name:  maxLengthName,
+				Type:  RRTypeTXT,
+				Class: RRTypeTXT,
+			},
+		},
+
+		Additional: []RR{
+			{
+				Name:  Name{},
+				Type:  RRTypeOPT,
+				Class: queryLimit,
+				TTL:   0,
+				Data:  []byte{},
+			},
+		},
+	}
+	resp, _ := responseFor(query, [][]byte{})
+
+	resp.Answer = []RR{
+		{
+			Name:  query.Question[0].Name,
+			Type:  query.Question[0].Type,
+			Class: query.Question[0].Class,
+			TTL:   responseTTL,
+			Data:  nil,
+		},
+	}
+
+	low := 0
+	high := 32768
+	for low+1 < high {
+		mid := (low + high) / 2
+		resp.Answer[0].Data = EncodeRDataTXT(make([]byte, mid))
+		buf, err := resp.WireFormat()
+		if err != nil {
+			panic(err)
+		}
+		if len(buf) <= limit {
+			low = mid
+		} else {
+			high = mid
+		}
+	}
+
+	return low
+}
--- a/transport/internet/finalmask/xicmp/client.go
+++ b/transport/internet/finalmask/xicmp/client.go
@@ -0,0 +1,350 @@
+package xicmp
+
+import (
+	"context"
+	"io"
+	"net"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common/crypto"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
+	"golang.org/x/net/icmp"
+	"golang.org/x/net/ipv4"
+	"golang.org/x/net/ipv6"
+)
+
+const (
+	initPollDelay       = 500 * time.Millisecond
+	maxPollDelay        = 10 * time.Second
+	pollDelayMultiplier = 2.0
+	pollLimit           = 16
+	windowSize          = 1000
+)
+
+type packet struct {
+	p    []byte
+	addr net.Addr
+}
+
+type seqStatus struct {
+	needSeqByte bool
+	seqByte     byte
+}
+
+type xicmpConnClient struct {
+	conn     net.PacketConn
+	icmpConn *icmp.PacketConn
+
+	typ       icmp.Type
+	id        int
+	seq       int
+	proto     int
+	seqStatus map[int]*seqStatus
+
+	pollChan   chan struct{}
+	readQueue  chan *packet
+	writeQueue chan *packet
+
+	closed bool
+	mutex  sync.Mutex
+}
+
+func NewConnClient(c *Config, raw net.PacketConn, end bool) (net.PacketConn, error) {
+	if !end {
+		return nil, errors.New("xicmp requires being at the outermost level")
+	}
+
+	network := "ip4:icmp"
+	typ := icmp.Type(ipv4.ICMPTypeEcho)
+	proto := 1
+	if strings.Contains(c.Ip, ":") {
+		network = "ip6:ipv6-icmp"
+		typ = ipv6.ICMPTypeEchoRequest
+		proto = 58
+	}
+
+	icmpConn, err := icmp.ListenPacket(network, c.Ip)
+	if err != nil {
+		return nil, errors.New("xicmp listen err").Base(err)
+	}
+
+	if c.Id == 0 {
+		c.Id = int32(crypto.RandBetween(0, 65535))
+	}
+
+	conn := &xicmpConnClient{
+		conn:     raw,
+		icmpConn: icmpConn,
+
+		typ:       typ,
+		id:        int(c.Id),
+		seq:       1,
+		proto:     proto,
+		seqStatus: make(map[int]*seqStatus),
+
+		pollChan:   make(chan struct{}, pollLimit),
+		readQueue:  make(chan *packet, 128),
+		writeQueue: make(chan *packet, 128),
+	}
+
+	go conn.recvLoop()
+	go conn.sendLoop()
+
+	return conn, nil
+}
+
+func (c *xicmpConnClient) encode(p []byte) ([]byte, error) {
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+
+	needSeqByte := false
+	var seqByte byte
+	data := p
+	if len(p) > 0 {
+		needSeqByte = true
+		seqByte = p[0]
+	}
+
+	msg := icmp.Message{
+		Type: c.typ,
+		Code: 0,
+		Body: &icmp.Echo{
+			ID:   c.id,
+			Seq:  c.seq,
+			Data: data,
+		},
+	}
+
+	buf, err := msg.Marshal(nil)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(buf) > 8192 {
+		return nil, errors.New("xicmp len(buf) > 8192")
+	}
+
+	c.seqStatus[c.seq] = &seqStatus{
+		needSeqByte: needSeqByte,
+		seqByte:     seqByte,
+	}
+
+	delete(c.seqStatus, int(uint16(c.seq-windowSize)))
+
+	c.seq++
+
+	if c.seq == 65536 {
+		delete(c.seqStatus, int(uint16(c.seq-windowSize)))
+		c.seq = 1
+	}
+
+	return buf, nil
+}
+
+func (c *xicmpConnClient) recvLoop() {
+	for {
+		if c.closed {
+			break
+		}
+
+		var buf [8192]byte
+
+		n, addr, err := c.icmpConn.ReadFrom(buf[:])
+		if err != nil {
+			continue
+		}
+
+		msg, err := icmp.ParseMessage(c.proto, buf[:n])
+		if err != nil {
+			continue
+		}
+
+		if msg.Type != ipv4.ICMPTypeEchoReply && msg.Type != ipv6.ICMPTypeEchoReply {
+			continue
+		}
+
+		echo, ok := msg.Body.(*icmp.Echo)
+		if !ok {
+			continue
+		}
+
+		c.mutex.Lock()
+		seqStatus, ok := c.seqStatus[echo.Seq]
+		c.mutex.Unlock()
+
+		if !ok {
+			continue
+		}
+
+		if seqStatus.needSeqByte {
+			if len(echo.Data) <= 1 {
+				continue
+			}
+			if echo.Data[0] == seqStatus.seqByte {
+				continue
+			}
+			echo.Data = echo.Data[1:]
+		}
+
+		if len(echo.Data) > 0 {
+			c.mutex.Lock()
+			delete(c.seqStatus, echo.Seq)
+			c.mutex.Unlock()
+
+			buf := make([]byte, len(echo.Data))
+			copy(buf, echo.Data)
+			select {
+			case c.readQueue <- &packet{
+				p:    buf,
+				addr: &net.UDPAddr{IP: addr.(*net.IPAddr).IP},
+			}:
+			default:
+			}
+
+			select {
+			case c.pollChan <- struct{}{}:
+			default:
+			}
+		}
+	}
+
+	close(c.pollChan)
+	close(c.readQueue)
+}
+
+func (c *xicmpConnClient) sendLoop() {
+	var addr net.Addr
+
+	pollDelay := initPollDelay
+	pollTimer := time.NewTimer(pollDelay)
+	for {
+		var p *packet
+		pollTimerExpired := false
+
+		select {
+		case p = <-c.writeQueue:
+		default:
+			select {
+			case p = <-c.writeQueue:
+			case <-c.pollChan:
+			case <-pollTimer.C:
+				pollTimerExpired = true
+			}
+		}
+
+		if p != nil {
+			addr = p.addr
+
+			select {
+			case <-c.pollChan:
+			default:
+			}
+		} else if addr != nil {
+			encoded, _ := c.encode(nil)
+			p = &packet{
+				p:    encoded,
+				addr: addr,
+			}
+		}
+
+		if pollTimerExpired {
+			pollDelay = time.Duration(float64(pollDelay) * pollDelayMultiplier)
+			if pollDelay > maxPollDelay {
+				pollDelay = maxPollDelay
+			}
+		} else {
+			if !pollTimer.Stop() {
+				<-pollTimer.C
+			}
+			pollDelay = initPollDelay
+		}
+		pollTimer.Reset(pollDelay)
+
+		if c.closed {
+			return
+		}
+
+		if p != nil {
+			_, err := c.icmpConn.WriteTo(p.p, p.addr)
+			if err != nil {
+				errors.LogDebug(context.Background(), "xicmp writeto err ", err)
+			}
+		}
+	}
+}
+
+func (c *xicmpConnClient) Size() int32 {
+	return 0
+}
+
+func (c *xicmpConnClient) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	packet, ok := <-c.readQueue
+	if !ok {
+		return 0, nil, io.EOF
+	}
+	n = copy(p, packet.p)
+	if n != len(packet.p) {
+		return 0, nil, io.ErrShortBuffer
+	}
+	return n, packet.addr, nil
+}
+
+func (c *xicmpConnClient) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	encoded, err := c.encode(p)
+	if err != nil {
+		return 0, errors.New("xicmp encode").Base(err)
+	}
+
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+
+	if c.closed {
+		return 0, errors.New("xicmp closed")
+	}
+
+	select {
+	case c.writeQueue <- &packet{
+		p:    encoded,
+		addr: &net.IPAddr{IP: addr.(*net.UDPAddr).IP},
+	}:
+		return len(p), nil
+	default:
+		return 0, errors.New("xicmp queue full")
+	}
+}
+
+func (c *xicmpConnClient) Close() error {
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+
+	if c.closed {
+		return nil
+	}
+
+	c.closed = true
+	close(c.writeQueue)
+
+	_ = c.icmpConn.Close()
+	return c.conn.Close()
+}
+
+func (c *xicmpConnClient) LocalAddr() net.Addr {
+	return &net.UDPAddr{
+		IP:   c.icmpConn.LocalAddr().(*net.IPAddr).IP,
+		Port: c.id,
+	}
+}
+
+func (c *xicmpConnClient) SetDeadline(t time.Time) error {
+	return c.icmpConn.SetDeadline(t)
+}
+
+func (c *xicmpConnClient) SetReadDeadline(t time.Time) error {
+	return c.icmpConn.SetReadDeadline(t)
+}
+
+func (c *xicmpConnClient) SetWriteDeadline(t time.Time) error {
+	return c.icmpConn.SetWriteDeadline(t)
+}
--- a/transport/internet/finalmask/xicmp/config.go
+++ b/transport/internet/finalmask/xicmp/config.go
@@ -0,0 +1,16 @@
+package xicmp
+
+import (
+	"net"
+)
+
+func (c *Config) UDP() {
+}
+
+func (c *Config) WrapPacketConnClient(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnClient(c, raw, end)
+}
+
+func (c *Config) WrapPacketConnServer(raw net.PacketConn, first bool, leaveSize int32, end bool) (net.PacketConn, error) {
+	return NewConnServer(c, raw, end)
+}
--- a/transport/internet/finalmask/xicmp/config.pb.go
+++ b/transport/internet/finalmask/xicmp/config.pb.go
@@ -0,0 +1,132 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.11
+// 	protoc        v3.21.12
+// source: transport/internet/finalmask/xicmp/config.proto
+
+package xicmp
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Config struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Ip            string                 `protobuf:"bytes,1,opt,name=ip,proto3" json:"ip,omitempty"`
+	Id            int32                  `protobuf:"varint,2,opt,name=id,proto3" json:"id,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *Config) Reset() {
+	*x = Config{}
+	mi := &file_transport_internet_finalmask_xicmp_config_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *Config) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Config) ProtoMessage() {}
+
+func (x *Config) ProtoReflect() protoreflect.Message {
+	mi := &file_transport_internet_finalmask_xicmp_config_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Config.ProtoReflect.Descriptor instead.
+func (*Config) Descriptor() ([]byte, []int) {
+	return file_transport_internet_finalmask_xicmp_config_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Config) GetIp() string {
+	if x != nil {
+		return x.Ip
+	}
+	return ""
+}
+
+func (x *Config) GetId() int32 {
+	if x != nil {
+		return x.Id
+	}
+	return 0
+}
+
+var File_transport_internet_finalmask_xicmp_config_proto protoreflect.FileDescriptor
+
+const file_transport_internet_finalmask_xicmp_config_proto_rawDesc = "" +
+	"\n" +
+	"/transport/internet/finalmask/xicmp/config.proto\x12'xray.transport.internet.finalmask.xicmp\"(\n" +
+	"\x06Config\x12\x0e\n" +
+	"\x02ip\x18\x01 \x01(\tR\x02ip\x12\x0e\n" +
+	"\x02id\x18\x02 \x01(\x05R\x02idB\xa6\x01\n" +
+	"+com.xray.transport.internet.finalmask.xicmpP\x01ZKgithub.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/xicmp\xaa\x02'Xray.Transport.Internet.Finalmask.Xicmpb\x06proto3"
+
+var (
+	file_transport_internet_finalmask_xicmp_config_proto_rawDescOnce sync.Once
+	file_transport_internet_finalmask_xicmp_config_proto_rawDescData []byte
+)
+
+func file_transport_internet_finalmask_xicmp_config_proto_rawDescGZIP() []byte {
+	file_transport_internet_finalmask_xicmp_config_proto_rawDescOnce.Do(func() {
+		file_transport_internet_finalmask_xicmp_config_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_xicmp_config_proto_rawDesc), len(file_transport_internet_finalmask_xicmp_config_proto_rawDesc)))
+	})
+	return file_transport_internet_finalmask_xicmp_config_proto_rawDescData
+}
+
+var file_transport_internet_finalmask_xicmp_config_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_transport_internet_finalmask_xicmp_config_proto_goTypes = []any{
+	(*Config)(nil), // 0: xray.transport.internet.finalmask.xicmp.Config
+}
+var file_transport_internet_finalmask_xicmp_config_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_transport_internet_finalmask_xicmp_config_proto_init() }
+func file_transport_internet_finalmask_xicmp_config_proto_init() {
+	if File_transport_internet_finalmask_xicmp_config_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_transport_internet_finalmask_xicmp_config_proto_rawDesc), len(file_transport_internet_finalmask_xicmp_config_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_transport_internet_finalmask_xicmp_config_proto_goTypes,
+		DependencyIndexes: file_transport_internet_finalmask_xicmp_config_proto_depIdxs,
+		MessageInfos:      file_transport_internet_finalmask_xicmp_config_proto_msgTypes,
+	}.Build()
+	File_transport_internet_finalmask_xicmp_config_proto = out.File
+	file_transport_internet_finalmask_xicmp_config_proto_goTypes = nil
+	file_transport_internet_finalmask_xicmp_config_proto_depIdxs = nil
+}
--- a/transport/internet/finalmask/xicmp/config.proto
+++ b/transport/internet/finalmask/xicmp/config.proto
@@ -0,0 +1,13 @@
+syntax = "proto3";
+
+package xray.transport.internet.finalmask.xicmp;
+option csharp_namespace = "Xray.Transport.Internet.Finalmask.Xicmp";
+option go_package = "github.com/amnezia-vpn/amnezia-xray-core/transport/internet/finalmask/xicmp";
+option java_package = "com.xray.transport.internet.finalmask.xicmp";
+option java_multiple_files = true;
+
+message Config {
+  string ip = 1;
+  int32 id = 2;
+}
+
--- a/transport/internet/finalmask/xicmp/server.go
+++ b/transport/internet/finalmask/xicmp/server.go
@@ -0,0 +1,377 @@
+package xicmp
+
+import (
+	"context"
+	"io"
+	"net"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/amnezia-vpn/amnezia-xray-core/common/crypto"
+	"github.com/amnezia-vpn/amnezia-xray-core/common/errors"
+	"golang.org/x/net/icmp"
+	"golang.org/x/net/ipv4"
+	"golang.org/x/net/ipv6"
+)
+
+const (
+	idleTimeout      = 2 * time.Minute
+	maxResponseDelay = 1 * time.Second
+)
+
+type record struct {
+	id          int
+	seq         int
+	needSeqByte bool
+	seqByte     byte
+	addr        net.Addr
+}
+
+type queue struct {
+	lash  time.Time
+	queue chan []byte
+}
+
+type xicmpConnServer struct {
+	conn     net.PacketConn
+	icmpConn *icmp.PacketConn
+
+	typ    icmp.Type
+	proto  int
+	config *Config
+
+	ch            chan *record
+	readQueue     chan *packet
+	writeQueueMap map[string]*queue
+
+	closed bool
+	mutex  sync.Mutex
+}
+
+func NewConnServer(c *Config, raw net.PacketConn, end bool) (net.PacketConn, error) {
+	if !end {
+		return nil, errors.New("xicmp requires being at the outermost level")
+	}
+
+	network := "ip4:icmp"
+	typ := icmp.Type(ipv4.ICMPTypeEchoReply)
+	proto := 1
+	if strings.Contains(c.Ip, ":") {
+		network = "ip6:ipv6-icmp"
+		typ = ipv6.ICMPTypeEchoReply
+		proto = 58
+	}
+
+	icmpConn, err := icmp.ListenPacket(network, c.Ip)
+	if err != nil {
+		return nil, errors.New("xicmp listen err").Base(err)
+	}
+
+	conn := &xicmpConnServer{
+		conn:     raw,
+		icmpConn: icmpConn,
+
+		typ:    typ,
+		proto:  proto,
+		config: c,
+
+		ch:            make(chan *record, 100),
+		readQueue:     make(chan *packet, 128),
+		writeQueueMap: make(map[string]*queue),
+	}
+
+	go conn.clean()
+	go conn.recvLoop()
+	go conn.sendLoop()
+
+	return conn, nil
+}
+
+func (c *xicmpConnServer) clean() {
+	f := func() bool {
+		c.mutex.Lock()
+		defer c.mutex.Unlock()
+
+		if c.closed {
+			return true
+		}
+
+		now := time.Now()
+
+		for key, q := range c.writeQueueMap {
+			if now.Sub(q.lash) >= idleTimeout {
+				close(q.queue)
+				delete(c.writeQueueMap, key)
+			}
+		}
+
+		return false
+	}
+
+	for {
+		time.Sleep(idleTimeout / 2)
+		if f() {
+			return
+		}
+	}
+}
+
+func (c *xicmpConnServer) ensureQueue(addr net.Addr) *queue {
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+
+	if c.closed {
+		return nil
+	}
+
+	q, ok := c.writeQueueMap[addr.String()]
+	if !ok {
+		q = &queue{
+			queue: make(chan []byte, 128),
+		}
+		c.writeQueueMap[addr.String()] = q
+	}
+	q.lash = time.Now()
+
+	return q
+}
+
+func (c *xicmpConnServer) encode(p []byte, id int, seq int, needSeqByte bool, seqByte byte) ([]byte, error) {
+	data := p
+	if needSeqByte {
+		b2 := c.randUntil(seqByte)
+		data = append([]byte{b2}, p...)
+	}
+
+	msg := icmp.Message{
+		Type: c.typ,
+		Code: 0,
+		Body: &icmp.Echo{
+			ID:   id,
+			Seq:  seq,
+			Data: data,
+		},
+	}
+
+	buf, err := msg.Marshal(nil)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(buf) > 8192 {
+		return nil, errors.New("xicmp len(buf) > 8192")
+	}
+
+	return buf, nil
+}
+
+func (c *xicmpConnServer) randUntil(b1 byte) byte {
+	b2 := byte(crypto.RandBetween(0, 255))
+	for {
+		if b2 != b1 {
+			return b2
+		}
+		b2 = byte(crypto.RandBetween(0, 255))
+	}
+}
+
+func (c *xicmpConnServer) recvLoop() {
+	for {
+		if c.closed {
+			break
+		}
+
+		var buf [8192]byte
+
+		n, addr, err := c.icmpConn.ReadFrom(buf[:])
+		if err != nil {
+			continue
+		}
+
+		msg, err := icmp.ParseMessage(c.proto, buf[:n])
+		if err != nil {
+			continue
+		}
+
+		if msg.Type != ipv4.ICMPTypeEcho && msg.Type != ipv6.ICMPTypeEchoRequest {
+			continue
+		}
+
+		echo, ok := msg.Body.(*icmp.Echo)
+		if !ok {
+			continue
+		}
+
+		if c.config.Id != 0 && echo.ID != int(c.config.Id) {
+			continue
+		}
+
+		needSeqByte := false
+		var seqByte byte
+
+		if len(echo.Data) > 0 {
+			needSeqByte = true
+			seqByte = echo.Data[0]
+
+			buf := make([]byte, len(echo.Data))
+			copy(buf, echo.Data)
+			select {
+			case c.readQueue <- &packet{
+				p: buf,
+				addr: &net.UDPAddr{
+					IP:   addr.(*net.IPAddr).IP,
+					Port: echo.ID,
+				},
+			}:
+			default:
+			}
+		}
+
+		select {
+		case c.ch <- &record{
+			id:          echo.ID,
+			seq:         echo.Seq,
+			needSeqByte: needSeqByte,
+			seqByte:     seqByte,
+			addr: &net.UDPAddr{
+				IP:   addr.(*net.IPAddr).IP,
+				Port: echo.ID,
+			},
+		}:
+		default:
+		}
+	}
+
+	close(c.ch)
+	close(c.readQueue)
+}
+
+func (c *xicmpConnServer) sendLoop() {
+	var nextRec *record
+	for {
+		rec := nextRec
+		nextRec = nil
+
+		if rec == nil {
+			var ok bool
+			rec, ok = <-c.ch
+			if !ok {
+				break
+			}
+		}
+
+		queue := c.ensureQueue(rec.addr)
+		if queue == nil {
+			return
+		}
+
+		var p []byte
+
+		timer := time.NewTimer(maxResponseDelay)
+
+		select {
+		case p = <-queue.queue:
+		default:
+			select {
+			case p = <-queue.queue:
+			case <-timer.C:
+			case nextRec = <-c.ch:
+			}
+		}
+
+		timer.Stop()
+
+		if len(p) == 0 {
+			continue
+		}
+
+		buf, err := c.encode(p, rec.id, rec.seq, rec.needSeqByte, rec.seqByte)
+		if err != nil {
+			continue
+		}
+
+		if c.closed {
+			return
+		}
+
+		_, err = c.icmpConn.WriteTo(buf, &net.IPAddr{IP: rec.addr.(*net.UDPAddr).IP})
+		if err != nil {
+			errors.LogDebug(context.Background(), "xicmp writeto err ", err)
+		}
+	}
+}
+
+func (c *xicmpConnServer) Size() int32 {
+	return 0
+}
+
+func (c *xicmpConnServer) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	packet, ok := <-c.readQueue
+	if !ok {
+		return 0, nil, io.EOF
+	}
+	n = copy(p, packet.p)
+	if n != len(packet.p) {
+		return 0, nil, io.ErrShortBuffer
+	}
+	return n, packet.addr, nil
+}
+
+func (c *xicmpConnServer) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	q := c.ensureQueue(addr)
+	if q == nil {
+		return 0, errors.New("xicmp closed")
+	}
+
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+
+	if c.closed {
+		return 0, errors.New("xicmp closed")
+	}
+
+	buf := make([]byte, len(p))
+	copy(buf, p)
+
+	select {
+	case q.queue <- buf:
+		return len(p), nil
+	default:
+		return 0, errors.New("xicmp queue full")
+	}
+}
+
+func (c *xicmpConnServer) Close() error {
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+
+	if c.closed {
+		return nil
+	}
+
+	c.closed = true
+	for key, q := range c.writeQueueMap {
+		close(q.queue)
+		delete(c.writeQueueMap, key)
+	}
+
+	_ = c.icmpConn.Close()
+	return c.conn.Close()
+}
+
+func (c *xicmpConnServer) LocalAddr() net.Addr {
+	return &net.UDPAddr{IP: c.icmpConn.LocalAddr().(*net.IPAddr).IP}
+}
+
+func (c *xicmpConnServer) SetDeadline(t time.Time) error {
+	return c.icmpConn.SetDeadline(t)
+}
+
+func (c *xicmpConnServer) SetReadDeadline(t time.Time) error {
+	return c.icmpConn.SetReadDeadline(t)
+}
+
+func (c *xicmpConnServer) SetWriteDeadline(t time.Time) error {
+	return c.icmpConn.SetWriteDeadline(t)
+}
--- a/transport/internet/finalmask/xicmp/xicmp_test.go
+++ b/transport/internet/finalmask/xicmp/xicmp_test.go
@@ -0,0 +1,74 @@
+package xicmp_test
+
+import (
+	"bytes"
+	"fmt"
+	"testing"
+
+	"golang.org/x/net/icmp"
+	"golang.org/x/net/ipv4"
+	"golang.org/x/net/ipv6"
+)
+
+func TestICMPEchoMarshal(t *testing.T) {
+	msg := icmp.Message{
+		Type: ipv4.ICMPTypeEcho,
+		Code: 0,
+		Body: &icmp.Echo{
+			ID:   65535,
+			Seq:  65537,
+			Data: nil,
+		},
+	}
+	ICMPTypeEcho, _ := msg.Marshal(nil)
+	fmt.Println("ICMPTypeEcho", len(ICMPTypeEcho), ICMPTypeEcho)
+
+	msg = icmp.Message{
+		Type: ipv4.ICMPTypeEchoReply,
+		Code: 0,
+		Body: &icmp.Echo{
+			ID:   65535,
+			Seq:  65537,
+			Data: nil,
+		},
+	}
+	ICMPTypeEchoReply, _ := msg.Marshal(nil)
+	fmt.Println("ICMPTypeEchoReply", len(ICMPTypeEchoReply), ICMPTypeEchoReply)
+
+	msg = icmp.Message{
+		Type: ipv6.ICMPTypeEchoRequest,
+		Code: 0,
+		Body: &icmp.Echo{
+			ID:   65535,
+			Seq:  65537,
+			Data: nil,
+		},
+	}
+	ICMPTypeEchoRequest, _ := msg.Marshal(nil)
+	fmt.Println("ICMPTypeEchoRequest", len(ICMPTypeEchoRequest), ICMPTypeEchoRequest)
+
+	msg = icmp.Message{
+		Type: ipv6.ICMPTypeEchoReply,
+		Code: 0,
+		Body: &icmp.Echo{
+			ID:   65535,
+			Seq:  65537,
+			Data: nil,
+		},
+	}
+	V6ICMPTypeEchoReply, _ := msg.Marshal(nil)
+	fmt.Println("V6ICMPTypeEchoReply", len(V6ICMPTypeEchoReply), V6ICMPTypeEchoReply)
+
+	if !bytes.Equal(ICMPTypeEcho[0:2], []byte{8, 0}) || !bytes.Equal(ICMPTypeEcho[4:], []byte{255, 255, 0, 1}) {
+		t.Fatalf("ICMPTypeEcho Type/Code or ID/Seq mismatch: %v", ICMPTypeEcho)
+	}
+	if !bytes.Equal(ICMPTypeEchoReply[0:2], []byte{0, 0}) || !bytes.Equal(ICMPTypeEchoReply[4:], []byte{255, 255, 0, 1}) {
+		t.Fatalf("ICMPTypeEchoReply Type/Code or ID/Seq mismatch: %v", ICMPTypeEchoReply)
+	}
+	if !bytes.Equal(ICMPTypeEchoRequest[0:2], []byte{128, 0}) || !bytes.Equal(ICMPTypeEchoRequest[4:], []byte{255, 255, 0, 1}) {
+		t.Fatalf("ICMPTypeEchoRequest Type/Code or ID/Seq mismatch: %v", ICMPTypeEchoRequest)
+	}
+	if !bytes.Equal(V6ICMPTypeEchoReply[0:2], []byte{129, 0}) || !bytes.Equal(V6ICMPTypeEchoReply[4:], []byte{255, 255, 0, 1}) {
+		t.Fatalf("V6ICMPTypeEchoReply Type/Code or ID/Seq mismatch: %v", V6ICMPTypeEchoReply)
+	}
+}
--- a/Show More
+++ b/Show More