Add Kmutex

The cache deduplication in Client.Exchange uses a channel-based lock
per DNS question. Waiting goroutines blocked on <-cond without context
awareness, causing them to accumulate indefinitely when the owning
goroutine's transport call stalls. Add select on ctx.Done() so waiters
respect context cancellation and timeouts.

.github/setup_go_for_windows7.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-VERSION="1.25.5"
+VERSION="1.25.7"
 
 mkdir -p $HOME/go
 cd $HOME/go

.github/workflows/build.yml

@@ -46,7 +46,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: ^1.25.5
+          go-version: ^1.25.7
       - name: Check input version
         if: github.event_name == 'workflow_dispatch'
         run: |-
@@ -110,7 +110,7 @@ jobs:
         if: ${{ ! (matrix.legacy_win7 || matrix.legacy_go124) }}
         uses: actions/setup-go@v5
         with:
-          go-version: ^1.25.5
+          go-version: ^1.25.7
       - name: Setup Go 1.24
         if: matrix.legacy_go124
         uses: actions/setup-go@v5
@@ -300,7 +300,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: ^1.25.5
+          go-version: ^1.25.7
       - name: Setup Android NDK
         id: setup-ndk
         uses: nttld/setup-ndk@v1
@@ -350,7 +350,7 @@ jobs:
           mkdir clients/android/app/libs
           cp libbox.aar clients/android/app/libs
           cd clients/android
-          ./gradlew :app:assemblePlayRelease :app:assembleOtherRelease
+          ./gradlew :app:assemblePlayRelease
         env:
           JAVA_HOME: /usr/lib/jvm/java-17-openjdk-amd64
           ANDROID_NDK_HOME: ${{ steps.setup-ndk.outputs.ndk-path }}
@@ -380,7 +380,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: ^1.25.5
+          go-version: ^1.25.7
       - name: Setup Android NDK
         id: setup-ndk
         uses: nttld/setup-ndk@v1
@@ -479,7 +479,7 @@ jobs:
         if: matrix.if
         uses: actions/setup-go@v5
         with:
-          go-version: ^1.25.5
+          go-version: ^1.25.7
       - name: Set tag
         if: matrix.if
         run: |-

.github/workflows/linux.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: ^1.25.5
+          go-version: ^1.25.7
       - name: Check input version
         if: github.event_name == 'workflow_dispatch'
         run: |-
@@ -71,7 +71,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: ^1.25.5
+          go-version: ^1.25.7
       - name: Setup Android NDK
         if: matrix.os == 'android'
         uses: nttld/setup-ndk@v1

.goreleaser.yaml

@@ -31,6 +31,54 @@ builds:
       - linux_arm_7
       - linux_s390x
       - linux_riscv64
+      - linux_mips
+      - linux_mips_softfloat
+      - linux_mipsle
+      - linux_mipsle_softfloat
+      - linux_mips64
+      - linux_mips64le
+      - windows_amd64_v1
+      - windows_386
+      - windows_arm64
+      - darwin_amd64_v1
+      - darwin_arm64
+    mod_timestamp: '{{ .CommitTimestamp }}'
+  - id: manager
+    main: ./cmd/sing-box
+    flags:
+      - -v
+      - -trimpath
+    ldflags:
+      - -X github.com/sagernet/sing-box/constant.Version={{ .Version }}
+      - -s
+      - -buildid=
+    tags:
+      - with_gvisor
+      - with_quic
+      - with_dhcp
+      - with_wireguard
+      - with_utls
+      - with_acme
+      - with_clash_api
+      - with_tailscale
+      - with_manager
+      - with_admin_panel
+    env:
+      - CGO_ENABLED=0
+      - GOTOOLCHAIN=local
+    targets:
+      - linux_386
+      - linux_amd64_v1
+      - linux_arm64
+      - linux_arm_6
+      - linux_arm_7
+      - linux_s390x
+      - linux_riscv64
+      - linux_mips
+      - linux_mips_softfloat
+      - linux_mipsle
+      - linux_mipsle_softfloat
+      - linux_mips64
       - linux_mips64le
       - windows_amd64_v1
       - windows_386
@@ -51,8 +99,6 @@ builds:
       - with_tailscale
     env:
       - CGO_ENABLED=0
-      - GOROOT={{ .Env.GOPATH }}/go_legacy
-    tool: "{{ .Env.GOPATH }}/go_legacy/bin/go"
     targets:
       - windows_amd64_v1
       - windows_386
@@ -104,91 +150,25 @@ archives:
     wrap_in_directory: true
     files:
       - LICENSE
-    name_template: '{{ .ProjectName }}-{{ .Version }}-{{ .Os }}-{{ .Arch }}{{ with .Arm }}v{{ . }}{{ end }}{{ if and .Mips (not (eq .Mips "hardfloat")) }}_{{ .Mips }}{{ end }}{{ if not (eq .Amd64 "v1") }}{{ .Amd64 }}{{ end }}'
+    name_template: '{{ .ProjectName }}-{{ .Version }}-{{ .Os }}-{{ .Arch }}{{ with .Arm }}v{{ . }}{{ end }}{{ if and .Mips (not (eq .Mips "hardfloat")) }}-{{ .Mips }}{{ end }}{{ if not (eq .Amd64 "v1") }}{{ .Amd64 }}{{ end }}'
+  - id: archive_with_manager
+    builds:
+      - manager
+    formats:
+      - tar.gz
+    format_overrides:
+      - goos: windows
+        formats:
+          - zip
+    wrap_in_directory: true
+    files:
+      - LICENSE
+    name_template: '{{ .ProjectName }}-{{ .Version }}-with-manager-{{ .Os }}-{{ .Arch }}{{ with .Arm }}v{{ . }}{{ end }}{{ if and .Mips (not (eq .Mips "hardfloat")) }}-{{ .Mips }}{{ end }}{{ if not (eq .Amd64 "v1") }}{{ .Amd64 }}{{ end }}'
   - id: archive-legacy
     <<: *template
     builds:
       - legacy
     name_template: '{{ .ProjectName }}-{{ .Version }}-{{ .Os }}-{{ .Arch }}-legacy'
-nfpms:
-  - id: package
-    package_name: sing-box
-    file_name_template: '{{ .ProjectName }}_{{ .Version }}_{{ .Os }}_{{ .Arch }}{{ with .Arm }}v{{ . }}{{ end }}{{ if and .Mips (not (eq .Mips "hardfloat")) }}_{{ .Mips }}{{ end }}{{ if not (eq .Amd64 "v1") }}{{ .Amd64 }}{{ end }}'
-    builds:
-      - main
-    homepage: https://sing-box.sagernet.org/
-    maintainer: nekohasekai <contact-git@sekai.icu>
-    description: The universal proxy platform.
-    license: GPLv3 or later
-    formats:
-      - deb
-      - rpm
-      - archlinux
-#      - apk
-#      - ipk
-    priority: extra
-    contents:
-      - src: release/config/config.json
-        dst: /etc/sing-box/config.json
-        type: "config|noreplace"
-
-      - src: release/config/sing-box.service
-        dst: /usr/lib/systemd/system/sing-box.service
-      - src: release/config/sing-box@.service
-        dst: /usr/lib/systemd/system/sing-box@.service
-      - src: release/config/sing-box.sysusers
-        dst: /usr/lib/sysusers.d/sing-box.conf
-      - src: release/config/sing-box.rules
-        dst: /usr/share/polkit-1/rules.d/sing-box.rules
-      - src: release/config/sing-box-split-dns.xml
-        dst: /usr/share/dbus-1/system.d/sing-box-split-dns.conf
-
-      - src: release/completions/sing-box.bash
-        dst: /usr/share/bash-completion/completions/sing-box.bash
-      - src: release/completions/sing-box.fish
-        dst: /usr/share/fish/vendor_completions.d/sing-box.fish
-      - src: release/completions/sing-box.zsh
-        dst: /usr/share/zsh/site-functions/_sing-box
-
-      - src: LICENSE
-        dst: /usr/share/licenses/sing-box/LICENSE
-    deb:
-      signature:
-        key_file: "{{ .Env.NFPM_KEY_PATH }}"
-      fields:
-        Bugs: https://github.com/SagerNet/sing-box/issues
-    rpm:
-      signature:
-        key_file: "{{ .Env.NFPM_KEY_PATH }}"
-    overrides:
-      apk:
-        contents:
-          - src: release/config/config.json
-            dst: /etc/sing-box/config.json
-            type: config
-
-          - src: release/config/sing-box.initd
-            dst: /etc/init.d/sing-box
-
-          - src: release/completions/sing-box.bash
-            dst: /usr/share/bash-completion/completions/sing-box.bash
-          - src: release/completions/sing-box.fish
-            dst: /usr/share/fish/vendor_completions.d/sing-box.fish
-          - src: release/completions/sing-box.zsh
-            dst: /usr/share/zsh/site-functions/_sing-box
-
-          - src: LICENSE
-            dst: /usr/share/licenses/sing-box/LICENSE
-      ipk:
-        contents:
-          - src: release/config/config.json
-            dst: /etc/sing-box/config.json
-            type: config
-
-          - src: release/config/openwrt.init
-            dst: /etc/init.d/sing-box
-          - src: release/config/openwrt.conf
-            dst: /etc/config/sing-box
 source:
   enabled: false
   name_template: '{{ .ProjectName }}-{{ .Version }}.source'
@@ -200,8 +180,8 @@ signs:
   - artifacts: checksum
 release:
   github:
-    owner: SagerNet
-    name: sing-box
+    owner: shtorm-7
+    name: sing-box-extended
   draft: true
   prerelease: auto
   mode: replace
@@ -209,5 +189,3 @@ release:
     - archive
     - package
   skip_upload: true
-partial:
-  by: target

DONATE.md

@@ -0,0 +1,24 @@
+# Support the project
+
+If you want to support the project, you can donate to the following addresses.
+
+### TRX (Tron)
+```
+TSWU6VUZ4FcUghYDmbbhK15gRVvhvBgW3F
+```
+### TON
+```
+UQAyD2UuT5kCP6lZQlhFL0hyNibDXNE4nIo_RSLVSYAtD7N1
+```
+### Solana
+```
+CJu8ickwRCwNE71uVFjYf1UveyCkRp9Xo44rhPcQpeFL
+```
+### Bitcoin
+```
+bc1qqx97p8k4dchqkyd47s4vf74hrqdfnmhqvcja7x
+```
+### Ethereum
+```
+0xAcc5919C22F2B3fAa0ec7E8BaD142da5B375FBF6
+```

Dockerfile

@@ -1,5 +1,5 @@
 FROM --platform=$BUILDPLATFORM golang:1.25-alpine AS builder
-LABEL maintainer="nekohasekai <contact-git@sekai.icu>"
+LABEL maintainer="shtorm-7"
 COPY . /go/src/github.com/sagernet/sing-box
 WORKDIR /go/src/github.com/sagernet/sing-box
 ARG TARGETOS TARGETARCH
@@ -18,7 +18,7 @@ RUN set -ex \
         -ldflags "-X \"github.com/sagernet/sing-box/constant.Version=$VERSION\" -s -w -buildid=" \
         ./cmd/sing-box
 FROM --platform=$TARGETPLATFORM alpine AS dist
-LABEL maintainer="nekohasekai <contact-git@sekai.icu>"
+LABEL maintainer="shtorm-7"
 RUN set -ex \
     && apk add --no-cache --upgrade bash tzdata ca-certificates nftables
 COPY --from=builder /go/bin/sing-box /usr/local/bin/sing-box

Makefile

@@ -1,6 +1,6 @@
 NAME = sing-box
 COMMIT = $(shell git rev-parse --short HEAD)
-TAGS ?= with_gvisor,with_quic,with_dhcp,with_wireguard,with_utls,with_acme,with_clash_api,with_tailscale
+TAGS ?= with_gvisor,with_quic,with_dhcp,with_wireguard,with_utls,with_acme,with_clash_api,with_tailscale,with_manager,with_admin_panel
 
 GOHOSTOS = $(shell go env GOHOSTOS)
 GOHOSTARCH = $(shell go env GOHOSTARCH)
@@ -64,14 +64,10 @@ update_certificates:
 	go run ./cmd/internal/update_certificates
 
 release:
-	go run ./cmd/internal/build goreleaser release --clean --skip publish
+	go run ./cmd/internal/build goreleaser release --skip=validate --clean -p 3 --skip publish
 	mkdir dist/release
 	mv dist/*.tar.gz \
 		dist/*.zip \
-		dist/*.deb \
-		dist/*.rpm \
-		dist/*_amd64.pkg.tar.zst \
-		dist/*_arm64.pkg.tar.zst \
 		dist/release
 	ghr --replace --draft --prerelease -p 5 "v${VERSION}" dist/release
 	rm -r dist/release
@@ -86,7 +82,7 @@ update_android_version:
 	go run ./cmd/internal/update_android_version
 
 build_android:
-	cd ../sing-box-for-android && ./gradlew :app:clean :app:assemblePlayRelease :app:assembleOtherRelease && ./gradlew --stop
+	cd ../sing-box-for-android && ./gradlew :app:clean :app:assemblePlayRelease && ./gradlew --stop
 
 upload_android:
 	mkdir -p dist/release_android
@@ -95,7 +91,7 @@ upload_android:
 	ghr --replace --draft --prerelease -p 5 "v${VERSION}" dist/release_android
 	rm -rf dist/release_android
 
-release_android: lib_android update_android_version build_android upload_android
+release_android: lib_android update_android_version build_android
 
 publish_android:
 	cd ../sing-box-for-android && ./gradlew :app:publishPlayReleaseBundle && ./gradlew --stop

README.md

@@ -2,22 +2,69 @@
 
 Sing-box with extended features.
 
-## Features
+## 🔥 Features
 
-* Amnezia 1.5
-* WARP
-* Tunneling
-* Mieru
-* XHTTP
-* SDNS (DNSCrypt)
-* Extended Wireguard options
-* Unified delay
+### 🌐 Outbounds
+- **WARP** — Cloudflare WARP integration through WireGuard
+- **Tunnel** — Protocol for creating tunnels across nodes
+- **Bond** — Link aggregation for increased throughput
+- **Mieru** — Secure, hard to classify, hard to probe network protocol
+- **Failover** — Automatic outbound switching for high availability
 
-## Examples
+### 🚦 Limiters
+- **Bandwidth Limiter** — Upload / download rate limiting
+- **Connection Limiter** — Concurrent connection control
+
+### 🛡 Encryption & Obfuscation
+- **Amnezia 1.5** — WireGuard traffic obfuscation
+- **VLESS encryption** — XRAY encryption for VLESS protocol
+
+### 🔄 Transports
+- **mKCP** — Reliable UDP-based transport
+- **XHTTP** — Modern XRAY transport
+
+### 🛠 Services
+- **Admin Panel** — Web-based management interface
+- **Manager** — Management service for configuring squads, nodes, users, limiters
+- **Node Manager** — Service for connecting nodes to remote manager
+
+### ⚙ Miscellaneous
+- **SDNS (DNSCrypt)** — Encrypted DNS queries for enhanced privacy
+- **Extended WireGuard options** — Advanced configuration capabilities  
+- **Unified Delay** — Unified latency measurement
+
+## 📚 Examples
+
+Configuration examples are available here:
 
 https://github.com/shtorm-7/sing-box-extended/tree/extended/examples
 
-## License
+## Support the Project
+
+If you want to support the project, you can donate to the following addresses.
+
+### TRX (Tron)
+```
+TSWU6VUZ4FcUghYDmbbhK15gRVvhvBgW3F
+```
+### TON
+```
+UQAyD2UuT5kCP6lZQlhFL0hyNibDXNE4nIo_RSLVSYAtD7N1
+```
+### Solana
+```
+CJu8ickwRCwNE71uVFjYf1UveyCkRp9Xo44rhPcQpeFL
+```
+### Bitcoin
+```
+bc1qqx97p8k4dchqkyd47s4vf74hrqdfnmhqvcja7x
+```
+### Ethereum
+```
+0xAcc5919C22F2B3fAa0ec7E8BaD142da5B375FBF6
+```
+
+## 📄 License
 
 ```
 Copyright (C) 2022 by nekohasekai <contact-sagernet@sekai.icu>

adapter/inbound.go

@@ -31,6 +31,7 @@ type UDPInjectableInbound interface {
 type InboundRegistry interface {
 	option.InboundOptionsRegistry
 	Create(ctx context.Context, router Router, logger log.ContextLogger, tag string, inboundType string, options any) (Inbound, error)
+	UnsafeCreate(ctx context.Context, router Router, logger log.ContextLogger, tag string, inboundType string, options any) (Inbound, error)
 }
 
 type InboundManager interface {

adapter/inbound/registry.go

@@ -57,6 +57,10 @@ func (m *Registry) CreateOptions(outboundType string) (any, bool) {
 func (m *Registry) Create(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, outboundType string, options any) (adapter.Inbound, error) {
 	m.access.Lock()
 	defer m.access.Unlock()
+	return m.UnsafeCreate(ctx, router, logger, tag, outboundType, options)
+}
+
+func (m *Registry) UnsafeCreate(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, outboundType string, options any) (adapter.Inbound, error) {
 	constructor, loaded := m.constructor[outboundType]
 	if !loaded {
 		return nil, E.New("outbound type not found: " + outboundType)

adapter/outbound.go

@@ -21,6 +21,7 @@ type Outbound interface {
 type OutboundRegistry interface {
 	option.OutboundOptionsRegistry
 	CreateOutbound(ctx context.Context, router Router, logger log.ContextLogger, tag string, outboundType string, options any) (Outbound, error)
+	UnsafeCreateOutbound(ctx context.Context, router Router, logger log.ContextLogger, tag string, outboundType string, options any) (Outbound, error)
 }
 
 type OutboundManager interface {

adapter/outbound/registry.go

@@ -57,6 +57,10 @@ func (r *Registry) CreateOptions(outboundType string) (any, bool) {
 func (r *Registry) CreateOutbound(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, outboundType string, options any) (adapter.Outbound, error) {
 	r.access.Lock()
 	defer r.access.Unlock()
+	return r.UnsafeCreateOutbound(ctx, router, logger, tag, outboundType, options)
+}
+
+func (r *Registry) UnsafeCreateOutbound(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, outboundType string, options any) (adapter.Outbound, error) {
 	constructor, loaded := r.constructors[outboundType]
 	if !loaded {
 		return nil, E.New("outbound type not found: " + outboundType)

box.go

@@ -159,6 +159,7 @@ func New(options Options) (*Box, error) {
 	if err != nil {
 		return nil, E.Cause(err, "create log factory")
 	}
+	service.MustRegister[log.Factory](ctx, logFactory)
 
 	var internalServices []adapter.LifecycleService
 	certificateOptions := common.PtrValueOrDefault(options.Certificate)

cmd/sing-box/cmd_tools_fetch_http3.go

@@ -1,5 +1,3 @@
-//go:build with_quic
-
 package main
 
 import (

common/kmutex/mutex.go

@@ -0,0 +1,57 @@
+package kmutex
+
+import "sync"
+
+type Kmutex[T comparable] struct {
+	l sync.Locker
+	s map[T]*klock
+}
+
+type klock struct {
+	cond *sync.Cond
+	ref  uint64
+}
+
+// Create new Kmutex
+func New[T comparable]() *Kmutex[T] {
+	l := sync.Mutex{}
+	return &Kmutex[T]{
+		l: &l,
+		s: make(map[T]*klock),
+	}
+}
+
+// Unlock Kmutex by unique ID
+func (km *Kmutex[T]) Unlock(key T) {
+	km.l.Lock()
+	defer km.l.Unlock()
+	kl, ok := km.s[key]
+	if !ok || kl.ref == 0 {
+		panic("unlock of unlocked kmutex")
+	}
+	kl.ref--
+	if kl.ref == 0 {
+		delete(km.s, key)
+		return
+	}
+	kl.cond.Signal()
+}
+
+// Lock Kmutex by unique ID
+func (km *Kmutex[T]) Lock(key T) {
+	km.l.Lock()
+	defer km.l.Unlock()
+	for {
+		kl, ok := km.s[key]
+		if !ok {
+			km.s[key] = &klock{
+				cond: sync.NewCond(km.l),
+				ref:  1,
+			}
+			return
+		}
+		kl.ref++
+		kl.cond.Wait()
+		return
+	}
+}

common/kmutex/mutex_test.go

@@ -0,0 +1,96 @@
+package kmutex
+
+import (
+	"sync"
+	"testing"
+	"time"
+)
+
+// Number of unique resources to access
+const number = 100
+
+func makeIds(count int) []int {
+	ids := make([]int, count)
+	for i := 0; i < count; i++ {
+		ids[i] = i
+	}
+	return ids
+}
+
+func TestKmutex(t *testing.T) {
+	km := New[int]()
+	ids := makeIds(number)
+	resources := make([]int, number)
+	wg := sync.WaitGroup{}
+
+	lc := make(chan int)
+	uc := make(chan int)
+	// Start 10n goroutines accessing n resources 10 times each
+	for i := 0; i < 10*number; i++ {
+		wg.Add(1)
+		go func(k int) {
+			for j := 0; j < 10; j++ {
+				lc <- k
+				km.Lock(ids[k])
+				// read and write resource to check for race
+				resources[k] = resources[k] + 1
+				km.Unlock(ids[k])
+				uc <- k
+			}
+			wg.Done()
+		}(i % len(ids))
+	}
+
+	to := time.After(time.Second)
+	counts := make(map[int]int)
+	var lCount, ulCount int
+loop:
+	for {
+		select {
+		case k := <-lc:
+			counts[k] = counts[k] + 1
+			lCount++
+		case k := <-uc:
+			counts[k] = counts[k] - 1
+			ulCount++
+		case <-to:
+			t.Fatal("timed out waiting for results")
+			break loop
+		}
+		expectCount := 100 * number
+		if lCount == expectCount && ulCount == expectCount {
+			// Have all results
+			break
+		}
+	}
+	for k, c := range counts {
+		if c != 0 {
+			t.Errorf("Key %d count != 0: %d\n", k, c)
+		}
+	}
+
+	wg.Wait()
+}
+
+func BenchmarkKmutex1000(b *testing.B) {
+	km := New[int]()
+	ids := makeIds(number)
+	resources := make([]int, number)
+	wg := sync.WaitGroup{}
+
+	// Start 1000 goroutines accessing 100 resources N times each
+	b.ResetTimer()
+	for i := 0; i < 1000; i++ {
+		wg.Add(1)
+		go func(k int) {
+			for j := 0; j < b.N; j++ {
+				km.Lock(ids[k])
+				// read and write resource to check for race
+				resources[k] = resources[k] + 1
+				km.Unlock(ids[k])
+			}
+			wg.Done()
+		}(i % len(ids))
+	}
+	wg.Wait()
+}

common/migrate/source/raw.go

@@ -0,0 +1,98 @@
+package source
+
+import (
+	"io"
+	"io/fs"
+	"io/ioutil"
+	"strconv"
+	"strings"
+
+	"github.com/golang-migrate/migrate/v4/source"
+	E "github.com/sagernet/sing/common/exceptions"
+)
+
+type RawDriver struct {
+	migrations    *source.Migrations
+	rawMigrations map[string]string
+}
+
+func NewRawDriver(rawMigrations map[string]string) *RawDriver {
+	return &RawDriver{rawMigrations: rawMigrations}
+}
+
+func (d *RawDriver) Init() error {
+	ms := source.NewMigrations()
+	for key := range d.rawMigrations {
+		m, err := source.DefaultParse(key)
+		if err != nil {
+			continue
+		}
+		if !ms.Append(m) {
+			return source.ErrDuplicateMigration{
+				Migration: *m,
+			}
+		}
+	}
+	d.migrations = ms
+	return nil
+}
+
+func (d *RawDriver) Open(url string) (source.Driver, error) {
+	return nil, E.New("open() cannot be called")
+}
+
+func (d *RawDriver) Close() error {
+	return nil
+}
+
+func (d *RawDriver) First() (version uint, err error) {
+	if version, ok := d.migrations.First(); ok {
+		return version, nil
+	}
+	return 0, &fs.PathError{
+		Op:  "first",
+		Err: fs.ErrNotExist,
+	}
+}
+
+func (d *RawDriver) Prev(version uint) (prevVersion uint, err error) {
+	if version, ok := d.migrations.Prev(version); ok {
+		return version, nil
+	}
+	return 0, &fs.PathError{
+		Op:  "prev for version " + strconv.FormatUint(uint64(version), 10),
+		Err: fs.ErrNotExist,
+	}
+}
+
+func (d *RawDriver) Next(version uint) (nextVersion uint, err error) {
+	if version, ok := d.migrations.Next(version); ok {
+		return version, nil
+	}
+	return 0, &fs.PathError{
+		Op:  "next for version " + strconv.FormatUint(uint64(version), 10),
+		Err: fs.ErrNotExist,
+	}
+}
+
+func (d *RawDriver) ReadUp(version uint) (r io.ReadCloser, identifier string, err error) {
+	if m, ok := d.migrations.Up(version); ok {
+		body := ioutil.NopCloser(strings.NewReader(d.rawMigrations[m.Raw]))
+		return body, m.Identifier, nil
+	}
+	return nil, "", &fs.PathError{
+		Op:  "read up for version " + strconv.FormatUint(uint64(version), 10),
+		Err: fs.ErrNotExist,
+	}
+}
+
+func (d *RawDriver) ReadDown(version uint) (r io.ReadCloser, identifier string, err error) {
+	if m, ok := d.migrations.Down(version); ok {
+		body := ioutil.NopCloser(strings.NewReader(d.rawMigrations[m.Raw]))
+		return body, m.Identifier, nil
+	}
+	return nil, "", &fs.PathError{
+		Op:  "read down for version " + strconv.FormatUint(uint64(version), 10),
+		Err: fs.ErrNotExist,
+	}
+}

common/mux/router.go

@@ -38,6 +38,9 @@ func NewRouterWithOptions(router adapter.ConnectionRouterEx, logger logger.Conte
 		}
 	}
 	service, err := mux.NewService(mux.ServiceOptions{
+		NewConnectionContext: func(ctx context.Context, conn net.Conn) context.Context {
+			return log.ContextWithNewMuxID(ctx)
+		},
 		NewStreamContext: func(ctx context.Context, conn net.Conn) context.Context {
 			return log.ContextWithNewID(ctx)
 		},

common/vision/hook.go

@@ -0,0 +1,25 @@
+package vision
+
+import (
+	"context"
+	"net"
+)
+
+type Hook func(net.Conn)
+
+type hookKey struct{}
+
+func WithHook(ctx context.Context, hook Hook) context.Context {
+	if hook == nil {
+		return ctx
+	}
+	return context.WithValue(ctx, hookKey{}, hook)
+}
+
+func HookFromContext(ctx context.Context) (Hook, bool) {
+	if ctx == nil {
+		return nil, false
+	}
+	hook, ok := ctx.Value(hookKey{}).(Hook)
+	return hook, ok
+}

common/xray/cpuid/cpuid.go

@@ -0,0 +1,18 @@
+package cpuid
+
+import (
+	"runtime"
+
+	"golang.org/x/sys/cpu"
+)
+
+var (
+	// Keep in sync with crypto/tls/cipher_suites.go.
+	hasGCMAsmAMD64 = cpu.X86.HasAES && cpu.X86.HasPCLMULQDQ
+	hasGCMAsmARM64 = cpu.ARM64.HasAES && cpu.ARM64.HasPMULL
+	hasGCMAsmS390X = cpu.S390X.HasAES && cpu.S390X.HasAESCBC && cpu.S390X.HasGHASH
+	hasGCMAsmPPC64 = runtime.GOARCH == "ppc64" || runtime.GOARCH == "ppc64le"
+
+	// HasAESGCM indicates whether the CPU has AES-GCM hardware acceleration.
+	HasAESGCM = hasGCMAsmAMD64 || hasGCMAsmARM64 || hasGCMAsmS390X || hasGCMAsmPPC64
+)

common/xray/json/badoption/range.go

@@ -20,6 +20,9 @@ func (c *Range) Build() *Range {
 }
 
 func (c *Range) MarshalJSON() ([]byte, error) {
+	if c.From == c.To {
+		return json.Marshal(c.From)
+	}
 	return json.Marshal(fmt.Sprintf("%d-%d", c.From, c.To))
 }
 
@@ -50,9 +53,15 @@ func (c *Range) UnmarshalJSON(content []byte) error {
 			rangeValue.From, rangeValue.To = int32(from), int32(to)
 		}
 	} else {
-		err := json.Unmarshal(content, &rangeValue)
-		if err != nil {
-			return err
+		var int32Value int32
+		err := json.Unmarshal(content, &int32Value)
+		if err == nil {
+			rangeValue.From, rangeValue.To = int32Value, int32Value
+		} else {
+			err := json.Unmarshal(content, &rangeValue)
+			if err != nil {
+				return err
+			}
 		}
 	}
 	if rangeValue.From > rangeValue.To {
@@ -62,6 +71,13 @@ func (c *Range) UnmarshalJSON(content []byte) error {
 	return nil
 }
 
+func (c *Range) String() string {
+	if c.From == c.To {
+		return strconv.FormatInt(int64(c.From), 10)
+	}
+	return fmt.Sprintf("%d-%d", c.From, c.To)
+}
+
 func (c Range) Rand() int32 {
 	return int32(crypto.RandBetween(int64(c.From), int64(c.To)))
 }

common/xray/pipe/impl.go

@@ -3,7 +3,6 @@ package pipe
 import (
 	"errors"
 	"io"
-	"runtime"
 	"sync"
 	"time"
 
@@ -136,11 +135,10 @@ func (p *pipe) writeMultiBufferInternal(mb buf.MultiBuffer) error {
 
 	if p.data == nil {
 		p.data = mb
-		return nil
+	} else {
+		p.data, _ = buf.MergeMulti(p.data, mb)
 	}
-
-	p.data, _ = buf.MergeMulti(p.data, mb)
-	return errSlowDown
+	return nil
 }
 
 func (p *pipe) WriteMultiBuffer(mb buf.MultiBuffer) error {
@@ -155,30 +153,23 @@ func (p *pipe) WriteMultiBuffer(mb buf.MultiBuffer) error {
 			return nil
 		}
 
-		if err == errSlowDown {
-			p.readSignal.Signal()
-
-			// Yield current goroutine. Hopefully the reading counterpart can pick up the payload.
-			runtime.Gosched()
-			return nil
+		if err == errBufferFull {
+			if p.option.discardOverflow {
+				buf.ReleaseMulti(mb)
+				return nil
+			}
+			select {
+			case <-p.writeSignal.Wait():
+				continue
+			case <-p.done.Wait():
+				buf.ReleaseMulti(mb)
+				return io.ErrClosedPipe
+			}
 		}
 
-		if err == errBufferFull && p.option.discardOverflow {
-			buf.ReleaseMulti(mb)
-			return nil
-		}
-
-		if err != errBufferFull {
-			buf.ReleaseMulti(mb)
-			p.readSignal.Signal()
-			return err
-		}
-
-		select {
-		case <-p.writeSignal.Wait():
-		case <-p.done.Wait():
-			return io.ErrClosedPipe
-		}
+		buf.ReleaseMulti(mb)
+		p.readSignal.Signal()
+		return err
 	}
 }
 

common/xray/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"

common/xray/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)
+}

common/xray/uuid/uuid.go

@@ -85,10 +85,14 @@ func ParseString(str string) (UUID, error) {
 	b := uuid.Bytes()
 
 	for _, byteGroup := range byteGroups {
-		if text[0] == '-' {
+		if len(text) > 0 && text[0] == '-' {
 			text = text[1:]
 		}
 
+		if len(text) < byteGroup {
+			return uuid, E.New("invalid UUID: ", str)
+		}
+
 		if _, err := hex.Decode(b[:byteGroup/2], text[:byteGroup]); err != nil {
 			return uuid, err
 		}

constant/proxy.go

@@ -1,40 +1,50 @@
 package constant
 
 const (
-	TypeTun          = "tun"
-	TypeRedirect     = "redirect"
-	TypeTProxy       = "tproxy"
-	TypeDirect       = "direct"
-	TypeBlock        = "block"
-	TypeDNS          = "dns"
-	TypeSOCKS        = "socks"
-	TypeHTTP         = "http"
-	TypeMixed        = "mixed"
-	TypeShadowsocks  = "shadowsocks"
-	TypeVMess        = "vmess"
-	TypeTrojan       = "trojan"
-	TypeNaive        = "naive"
-	TypeWireGuard    = "wireguard"
-	TypeWARP         = "warp"
-	TypeHysteria     = "hysteria"
-	TypeTor          = "tor"
-	TypeSSH          = "ssh"
-	TypeShadowTLS    = "shadowtls"
-	TypeMieru        = "mieru"
-	TypeAnyTLS       = "anytls"
-	TypeShadowsocksR = "shadowsocksr"
-	TypeVLESS        = "vless"
-	TypeTUIC         = "tuic"
-	TypeHysteria2    = "hysteria2"
-	TypeTunnelClient = "tunnel_client"
-	TypeTunnelServer = "tunnel_server"
-	TypeTailscale    = "tailscale"
-	TypeDERP         = "derp"
-	TypeResolved     = "resolved"
-	TypeSSMAPI       = "ssm-api"
+	TypeTun               = "tun"
+	TypeRedirect          = "redirect"
+	TypeTProxy            = "tproxy"
+	TypeDirect            = "direct"
+	TypeBlock             = "block"
+	TypeDNS               = "dns"
+	TypeSOCKS             = "socks"
+	TypeHTTP              = "http"
+	TypeMixed             = "mixed"
+	TypeShadowsocks       = "shadowsocks"
+	TypeVMess             = "vmess"
+	TypeTrojan            = "trojan"
+	TypeNaive             = "naive"
+	TypeWireGuard         = "wireguard"
+	TypeWARP              = "warp"
+	TypeHysteria          = "hysteria"
+	TypeTor               = "tor"
+	TypeSSH               = "ssh"
+	TypeShadowTLS         = "shadowtls"
+	TypeMieru             = "mieru"
+	TypeAnyTLS            = "anytls"
+	TypeShadowsocksR      = "shadowsocksr"
+	TypeVLESS             = "vless"
+	TypeTUIC              = "tuic"
+	TypeHysteria2         = "hysteria2"
+	TypeBond              = "bond"
+	TypeTunnelServer      = "tunnel-server"
+	TypeTunnelClient      = "tunnel-client"
+	TypeTailscale         = "tailscale"
+	TypeConnectionLimiter = "connection-limiter"
+	TypeBandwidthLimiter  = "bandwidth-limiter"
+	TypeTrafficLimiter    = "traffic-limiter"
+	TypeAdminPanel        = "admin-panel"
+	TypeNodeManagerServer = "node-manager-server"
+	TypeNodeManagerClient = "node-manager-client"
+	TypeDERP              = "derp"
+	TypeManager           = "manager"
+	TypeNode              = "node"
+	TypeResolved          = "resolved"
+	TypeSSMAPI            = "ssm-api"
 )
 
 const (
+	TypeFailover = "failover"
 	TypeSelector = "selector"
 	TypeURLTest  = "urltest"
 )
@@ -87,18 +97,22 @@ func ProxyDisplayName(proxyType string) string {
 		return "TUIC"
 	case TypeHysteria2:
 		return "Hysteria2"
+	case TypeBond:
+		return "Bond"
 	case TypeMieru:
 		return "Mieru"
 	case TypeAnyTLS:
 		return "AnyTLS"
+	case TypeFailover:
+		return "Failover"
 	case TypeSelector:
 		return "Selector"
 	case TypeURLTest:
 		return "URLTest"
 	case TypeTunnelClient:
-		return "Tunnel Client"
+		return "Tunnel client"
 	case TypeTunnelServer:
-		return "Tunnel Server"
+		return "Tunnel server"
 	default:
 		return "Unknown"
 	}

constant/v2ray.go

@@ -7,4 +7,5 @@ const (
 	V2RayTransportTypeGRPC        = "grpc"
 	V2RayTransportTypeHTTPUpgrade = "httpupgrade"
 	V2RayTransportTypeXHTTP       = "xhttp"
+	V2RayTransportTypeKCP         = "mkcp"
 )

dns/client.go

@@ -144,7 +144,11 @@ func (c *Client) Exchange(ctx context.Context, transport adapter.DNSTransport, m
 		if c.cache != nil {
 			cond, loaded := c.cacheLock.LoadOrStore(question, make(chan struct{}))
 			if loaded {
-				<-cond
+				select {
+				case <-cond:
+				case <-ctx.Done():
+					return nil, ctx.Err()
+				}
 			} else {
 				defer func() {
 					c.cacheLock.Delete(question)
@@ -154,7 +158,11 @@ func (c *Client) Exchange(ctx context.Context, transport adapter.DNSTransport, m
 		} else if c.transportCache != nil {
 			cond, loaded := c.transportCacheLock.LoadOrStore(question, make(chan struct{}))
 			if loaded {
-				<-cond
+				select {
+				case <-cond:
+				case <-ctx.Done():
+					return nil, ctx.Err()
+				}
 			} else {
 				defer func() {
 					c.transportCacheLock.Delete(question)

dns/router.go

@@ -378,9 +378,11 @@ func (r *Router) Lookup(ctx context.Context, domain string, options adapter.DNSQ
 				case *R.RuleActionReject:
 					return nil, &R.RejectedError{Cause: action.Error(ctx)}
 				case *R.RuleActionPredefined:
+					responseAddrs = nil
 					if action.Rcode != mDNS.RcodeSuccess {
 						err = RcodeError(action.Rcode)
 					} else {
+						err = nil
 						for _, answer := range action.Answer {
 							switch record := answer.(type) {
 							case *mDNS.A:

docs/changelog.md

@@ -2,6 +2,34 @@
 icon: material/alert-decagram
 ---
 
+#### 1.12.22
+
+* Fixes and improvements
+
+#### 1.12.21
+
+* Fixes and improvements
+
+#### 1.12.20
+
+* Fixes and improvements
+
+#### 1.12.19
+
+* Fixes and improvements
+
+#### 1.12.18
+
+* Add fallback routing rule for `auto_redirect` **1**
+* Fixes and improvements
+
+**1**:
+
+Adds a fallback iproute2 rule checked after system default rules (32766: main, 32767: default),
+ensuring traffic is routed to the sing-box table when no route is found in system tables.
+
+The rule index can be customized via `auto_redirect_iproute2_fallback_rule_index` (default: 32768).
+
 #### 1.12.17
 
 * Update uTLS to v1.8.2 **1**

docs/configuration/inbound/tun.md

@@ -2,6 +2,10 @@
 icon: material/new-box
 ---
 
+!!! quote "Changes in sing-box 1.12.18"
+
+    :material-plus: [auto_redirect_iproute2_fallback_rule_index](#auto_redirect_iproute2_fallback_rule_index)
+
 !!! quote "Changes in sing-box 1.12.0"
 
     :material-plus: [loopback_address](#loopback_address)
@@ -63,6 +67,7 @@ icon: material/new-box
   "auto_redirect": true,
   "auto_redirect_input_mark": "0x2023",
   "auto_redirect_output_mark": "0x2024",
+  "auto_redirect_iproute2_fallback_rule_index": 32768,
   "loopback_address": [
     "10.7.0.1"
   ],
@@ -278,6 +283,17 @@ Connection output mark used by `auto_redirect`.
 
 `0x2024` is used by default.
 
+#### auto_redirect_iproute2_fallback_rule_index
+
+!!! question "Since sing-box 1.12.18"
+
+Linux iproute2 fallback rule index generated by `auto_redirect`.
+
+This rule is checked after system default rules (32766: main, 32767: default),
+routing traffic to the sing-box table only when no route is found in system tables.
+
+`32768` is used by default.
+
 #### loopback_address
 
 !!! question "Since sing-box 1.12.0"

docs/configuration/inbound/tun.zh.md

@@ -2,6 +2,10 @@
 icon: material/new-box
 ---
 
+!!! quote "sing-box 1.12.18 中的更改"
+
+    :material-plus: [auto_redirect_iproute2_fallback_rule_index](#auto_redirect_iproute2_fallback_rule_index)
+
 !!! quote "sing-box 1.12.0 中的更改"
 
     :material-plus: [loopback_address](#loopback_address)
@@ -63,6 +67,7 @@ icon: material/new-box
   "auto_redirect": true,
   "auto_redirect_input_mark": "0x2023",
   "auto_redirect_output_mark": "0x2024",
+  "auto_redirect_iproute2_fallback_rule_index": 32768,
   "loopback_address": [
     "10.7.0.1"
   ],
@@ -277,6 +282,17 @@ tun 接口的 IPv6 前缀。
 
 默认使用 `0x2024`。
 
+#### auto_redirect_iproute2_fallback_rule_index
+
+!!! question "自 sing-box 1.12.18 起"
+
+`auto_redirect` 生成的 iproute2 回退规则索引。
+
+此规则在系统默认规则（32766: main，32767: default）之后检查，
+仅当系统路由表中未找到路由时才将流量路由到 sing-box 路由表。
+
+默认使用 `32768`。
+
 #### loopback_address
 
 !!! question "自 sing-box 1.12.0 起"

examples/bandwidth_limiter/connection.json

@@ -0,0 +1,57 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      "type": "vless",
+      "tag": "vless-in",
+      "listen": "0.0.0.0",
+      "listen_port": 443,
+      "transport": {
+        "type": "http"
+      },
+      "users": [
+        {
+          "name": "user1",
+          "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+        },
+        {
+          "name": "user2",
+          "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+        }
+      ]
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    },
+    {
+      "type": "bandwidth-limiter",
+      "tag": "bandwidth-limiter",
+      "strategy": "connection",
+      "mode": "duplex", // download, upload
+      "connection_type": "hwid", // mux, ip
+      "speed": "1MB", // 100KB, 1GB, etc.
+      "route": { // https://sing-box.sagernet.org/configuration/route/#structure
+        "rules": [],
+        "final": "direct"
+      }
+    }
+  ],
+  "route": {
+    "final": "bandwidth-limiter",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}

examples/bandwidth_limiter/global.json

@@ -0,0 +1,56 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      "type": "vless",
+      "tag": "vless-in",
+      "listen": "0.0.0.0",
+      "listen_port": 443,
+      "transport": {
+        "type": "http"
+      },
+      "users": [
+        {
+          "name": "user1",
+          "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+        },
+        {
+          "name": "user2",
+          "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+        }
+      ]
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    },
+    {
+      "type": "bandwidth-limiter",
+      "tag": "bandwidth-limiter",
+      "strategy": "global",
+      "mode": "duplex", // download, upload
+      "speed": "1MB", // 100KB, 1GB, etc.
+      "route": { // https://sing-box.sagernet.org/configuration/route/#structure
+        "rules": [],
+        "final": "direct"
+      }
+    }
+  ],
+  "route": {
+    "final": "bandwidth-limiter",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}

examples/bandwidth_limiter/multi.json

@@ -0,0 +1,78 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      "type": "vless",
+      "tag": "vless-in",
+      "listen": "0.0.0.0",
+      "listen_port": 443,
+      "transport": {
+        "type": "http"
+      },
+      "users": [
+        {
+          "name": "user1",
+          "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+        },
+        {
+          "name": "user2",
+          "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+        }
+      ]
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    },
+    {
+      "type": "bandwidth-limiter",
+      "tag": "duplex-bandwidth-limiter",
+      "strategy": "global",
+      "mode": "duplex",
+      "speed": "5MB",
+      "route": { // https://sing-box.sagernet.org/configuration/route/#structure
+        "rules": [],
+        "final": "direct"
+      }
+    },
+    {
+      "type": "bandwidth-limiter",
+      "tag": "upload-bandwidth-limiter",
+      "strategy": "global",
+      "mode": "upload",
+      "speed": "3MB",
+      "route": { // https://sing-box.sagernet.org/configuration/route/#structure
+        "rules": [],
+        "final": "duplex-bandwidth-limiter"
+      }
+    },
+    {
+      "type": "bandwidth-limiter",
+      "tag": "download-bandwidth-limiter",
+      "strategy": "global",
+      "mode": "download",
+      "speed": "3MB",
+      "route": { // https://sing-box.sagernet.org/configuration/route/#structure
+        "rules": [],
+        "final": "upload-bandwidth-limiter"
+      }
+    }
+  ],
+  "route": {
+    "final": "download-bandwidth-limiter",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}

examples/bandwidth_limiter/users.json

@@ -0,0 +1,70 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      "type": "vless",
+      "tag": "vless-in",
+      "listen": "0.0.0.0",
+      "listen_port": 443,
+      "transport": {
+        "type": "http"
+      },
+      "users": [
+        {
+          "name": "user1",
+          "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+        },
+        {
+          "name": "user2",
+          "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+        }
+      ]
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    },
+    {
+      "type": "bandwidth-limiter",
+      "tag": "bandwidth-limiter",
+      "strategy": "users",
+      "users": [
+        {
+          "name": "user1",
+          "strategy": "connection", // global
+          "mode": "duplex", // download, upload
+          "connection_type": "hwid", // mux, ip
+          "speed": "5MB", // 100KB, 1GB, etc.
+        },
+        {
+          "name": "user2",
+          "strategy": "connection", // global
+          "mode": "duplex", // download, upload
+          "connection_type": "hwid", // mux, ip
+          "speed": "1MB", // 100KB, 1GB, etc.
+        },
+      ],
+      "route": { // https://sing-box.sagernet.org/configuration/route/#structure
+        "rules": [],
+        "final": "direct"
+      }
+    }
+  ],
+  "route": {
+    "final": "bandwidth-limiter",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}

examples/bond/client.json

@@ -0,0 +1,61 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      "type": "mixed",
+      "tag": "mixed-in",
+      "listen_port": 7897
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    },
+    {
+      "type": "bond",
+      "tag": "bond-out",
+      "outbounds": [ // sum of download_ratio and upload_ratio must be 100
+        {
+          "outbound": {
+            "type": "vless",
+            "server": "0.0.0.0",
+            "server_port": 443,
+            "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937",
+            "network": "tcp",
+            "bind_interface": ""
+          },
+          "download_ratio": 50,
+          "upload_ratio": 50
+        },
+        {
+          "outbound": {
+            "type": "vless",
+            "server": "0.0.0.0",
+            "server_port": 444,
+            "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937",
+            "network": "tcp",
+            "bind_interface": ""
+          },
+          "download_ratio": 50,
+          "upload_ratio": 50
+        }
+      ] 
+    }
+  ],
+  "route": {
+    "final": "bond-out",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}

examples/bond/client_multi.json

@@ -0,0 +1,49 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      "type": "mixed",
+      "tag": "mixed-in",
+      "listen_port": 7897
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    },
+    {
+      "type": "bond",
+      "tag": "bond-out",
+      "outbounds": [ // sum of download_ratio and upload_ratio must be 100
+        {
+          "outbound": {
+            "type": "vless",
+            "server": "0.0.0.0",
+            "server_port": 443,
+            "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937",
+            "network": "tcp",
+          },
+          "download_ratio": 20,
+          "upload_ratio": 20,
+          "count": 5
+        }
+      ] 
+    }
+  ],
+  "route": {
+    "final": "bond-out",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}

examples/bond/client_split.json

@@ -0,0 +1,61 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      "type": "mixed",
+      "tag": "mixed-in",
+      "listen_port": 7897
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    },
+    {
+      "type": "bond",
+      "tag": "bond-out",
+      "outbounds": [ // sum of download_ratio and upload_ratio must be 100
+        {
+          "outbound": {
+            "type": "vless",
+            "server": "0.0.0.0",
+            "server_port": 443,
+            "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937",
+            "network": "tcp",
+            "bind_interface": ""
+          },
+          "download_ratio": 100,
+          "upload_ratio": 0
+        },
+        {
+          "outbound": {
+            "type": "vless",
+            "server": "0.0.0.0",
+            "server_port": 444,
+            "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937",
+            "network": "tcp",
+            "bind_interface": ""
+          },
+          "download_ratio": 0,
+          "upload_ratio": 100
+        }
+      ] 
+    }
+  ],
+  "route": {
+    "final": "bond-out",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}

examples/bond/server.json

@@ -0,0 +1,54 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+     {
+      "type": "bond",
+      "tag": "bond-in",
+      "inbounds": [
+        {
+          "type": "vless",
+          "listen": "0.0.0.0",
+          "listen_port": 443,
+          "users": [
+            {
+              "name": "user",
+              "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+            }
+          ]
+        },
+        {
+          "type": "vless",
+          "listen": "0.0.0.0",
+          "listen_port": 444,
+          "users": [
+            {
+              "name": "user",
+              "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    },
+  ],
+  "route": {
+    "final": "direct",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}

examples/connection_limiter/connection.json

@@ -0,0 +1,56 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      "type": "vless",
+      "tag": "vless-in",
+      "listen": "0.0.0.0",
+      "listen_port": 443,
+      "transport": {
+        "type": "http"
+      },
+      "users": [
+        {
+          "name": "user1",
+          "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+        },
+        {
+          "name": "user2",
+          "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+        }
+      ],
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    },
+    {
+      "type": "connection-limiter",
+      "tag": "connection-limiter",
+      "strategy": "connection",
+      "connection_type": "hwid", // mux, ip
+      "count": 5,
+      "route": { // https://sing-box.sagernet.org/configuration/route/#structure
+        "rules": [],
+        "final": "direct"
+      }
+    }
+  ],
+  "route": {
+    "final": "connection-limiter",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}

examples/connection_limiter/users.json

@@ -0,0 +1,68 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      "type": "vless",
+      "tag": "vless-in",
+      "listen": "0.0.0.0",
+      "listen_port": 5000,
+      "transport": {
+        "type": "http"
+      },
+      "users": [
+        {
+          "name": "user1",
+          "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+        },
+        {
+          "name": "user2",
+          "uuid": "6c8c7ffc-a909-4699-af34-e9d9bcb3e6d6"
+        }
+      ],
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    },
+    {
+      "type": "connection-limiter",
+      "tag": "connection-limiter",
+      "strategy": "users",
+      "users": [
+        {
+          "name": "user1",
+          "strategy": "connection",
+          "connection_type": "hwid", // mux, ip
+          "count": 5,
+        },
+        {
+          "name": "user2",
+          "strategy": "connection",
+          "connection_type": "hwid", // mux, ip
+          "count": 1,
+        },
+      ],
+      "route": { // https://sing-box.sagernet.org/configuration/route/#structure
+        "rules": [],
+        "final": "direct"
+      }
+    }
+  ],
+  "route": {
+    "final": "connection-limiter",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}

examples/failover/client.json

@@ -0,0 +1,61 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      "type": "mixed",
+      "tag": "mixed-in",
+      "listen_port": 7897
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    },
+    {
+      "type": "vless",
+      "tag": "vless-1-out",
+      "server": "example1.com",
+      "server_port": 443,
+      "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+    },
+    {
+      "type": "vless",
+      "tag": "vless-2-out",
+      "server": "example2.com",
+      "server_port": 443,
+      "uuid": "294fd6bc-4f89-43e7-9228-7900aba396af"
+    },
+    {
+      "type": "vless",
+      "tag": "vless-3-out",
+      "server": "example3.com",
+      "server_port": 443,
+      "uuid": "257f20d0-294a-4f07-9f2c-9efee9a37400"
+    },
+    {
+      "type": "failover",
+      "tag": "failover-out",
+      "outbounds": [
+        "vless-1-out",
+        "vless-2-out",
+        "vless-3-out"
+      ]
+    }
+  ],
+  "route": {
+    "final": "failover-out",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}

examples/manager/manager.json

@@ -0,0 +1,70 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct-out"
+    },
+    {
+      "type": "dns",
+      "tag": "dns-out"
+    }
+  ],
+  "route": {
+    "rules": [
+      {
+        "protocol": "dns",
+        "outbound": "dns-out"
+      },
+      {
+        "port": 53,
+        "outbound": "dns-out"
+      },
+    ],
+    "final": "direct-out"
+  },
+  "services": [
+    {
+      "type": "manager",
+      "tag": "my-manager",
+      "database": {
+        "driver": "postgresql",
+        "dsn": "postgresql://postgres:postgres@localhost:5432/manager?sslmode=disable"
+      }
+    },
+    { // http://127.0.0.1:8000
+      // Username: admin
+      // Password: admin
+      "type": "admin-panel",
+      "tag": "my-admin-panel",
+      "listen_port": 8000,
+      "manager": "my-manager",
+      "database": {
+        "driver": "postgresql",
+        "dsn": "postgresql://postgres:postgres@localhost:5432/adminpanel?sslmode=disable"
+      }
+    },
+    {
+      "type": "node-manager-server", // for connecting nodes
+      "listen_port": 7000,
+      "manager": "my-manager",
+      "tls": { // https://sing-box.sagernet.org/configuration/shared/tls/#inbound
+        "enabled": true,
+        "server_name": "example.com",
+        "certificate_path": "/path/to/fullchain.pem",
+        "key_path": "/path/to/privkey.pem"
+      },
+    }
+  ]
+}

examples/manager/node.json

@@ -0,0 +1,85 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      "type": "vless",
+      "tag": "vless-in",
+      "listen": "0.0.0.0",
+      "listen_port": 443,
+      "transport": {
+        "type": "http"
+      }
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct-out"
+    },
+    {
+      "type": "dns",
+      "tag": "dns-out"
+    },
+    {
+      "type": "bandwidth-limiter",
+      "tag": "bandwidth-limiter",
+      "strategy": "manager",
+      "route": {
+        "final": "direct-out"
+      }
+    },
+    {
+      "type": "connection-limiter",
+      "tag": "connection-limiter",
+      "strategy": "manager",
+      "route": {
+        "final": "bandwidth-limiter"
+      }
+    },
+  ],
+  "route": {
+    "rules": [
+      {
+        "protocol": "dns",
+        "outbound": "dns-out"
+      },
+      {
+        "port": 53,
+        "outbound": "dns-out"
+      }
+    ],
+    "final": "connection-limiter"
+  },
+  "services": [
+    {
+      "type": "node",
+      "tag": "my-node",
+      "uuid": "e6eceb84-ad66-474b-8641-142499db7c6e",
+      "manager": "node-manager",
+      "inbounds": ["vless-in"],
+      "bandwidth_limiters": ["bandwidth-limiter"],
+      "connection_limiters": ["connection-limiter"],
+    },
+    {
+      "type": "node-manager-client",
+      "tag": "node-manager",
+      "server": "example.com",
+      "server_port": 7000,
+      "tls": { // https://sing-box.sagernet.org/configuration/shared/tls/#outbound
+        "enabled": true,
+        "server_name": "example.com",
+        "alpn": "h2" // h3 for QUIC
+      },
+    }
+  ]
+}

examples/mkcp/client.json

@@ -0,0 +1,43 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      "type": "mixed",
+      "tag": "mixed-in",
+      "listen_port": 7897
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    },
+    {
+      "type": "vless",
+      "tag": "vless-out",
+      "server": "example.com",
+      "server_port": 443,
+      "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937",
+      "packet_encoding": "",
+      "transport": {
+        "type": "mkcp",
+        "mtu": 1500
+      }
+    }
+  ],
+  "route": {
+    "final": "vless-out",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}

examples/mkcp/server.json

@@ -0,0 +1,42 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      "type": "vless",
+      "tag": "vless-in",
+      "listen": "0.0.0.0",
+      "listen_port": 443,
+      "users": [
+        {
+          "name": "user",
+          "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+        }
+      ],
+      "transport": {
+        "type": "mkcp",
+        "mtu": 1500
+      }
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    }
+  ],
+  "route": {
+    "final": "direct",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}

examples/tunnel/client-server/client.json

@@ -1,6 +1,6 @@
 {
   "log": {
-    "level": "error"
+    "level": "info"
   },
   "dns": {
     "servers": [
@@ -12,7 +12,7 @@
   },
   "endpoints": [
     {
-      "type": "tunnel_client",
+      "type": "tunnel-client",
       "tag": "tunnel",
       "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937",
       "key": "1c9b2ccf-b0c0-4c26-868d-a55a4edad3fe",
@@ -30,7 +30,7 @@
     {
       "type": "mixed",
       "tag": "mixed-in",
-      "listen_port": 7897
+      "listen_port": 10000
     }
   ],
   "outbounds": [
@@ -41,16 +41,22 @@
     {
       "type": "dns",
       "tag": "dns-out"
+    },
+    {
+      "type": "failover",
+      "tag": "f",
+      "outbounds": ["tunnel", "direct-out"],
+      "interrupt_exist_connections": false,
     }
   ],
   "route": {
     "rules": [
       {
-        "outbound": "tunnel",
+        "outbound": "f",
         "override_tunnel_destination": "f79f7678-55e7-432d-a15f-6e8ab2b7fe13"
       }
     ],
-    "final": "direct-out",
+    "final": "f",
     "default_domain_resolver": "default",
     "auto_detect_interface": true
   }

examples/tunnel/client-server/server.json

@@ -1,6 +1,6 @@
 {
   "log": {
-    "level": "error"
+    "level": "info"
   },
   "dns": {
     "servers": [
@@ -12,7 +12,7 @@
   },
   "endpoints": [
     {
-      "type": "tunnel_server",
+      "type": "tunnel-server",
       "tag": "tunnel",
       "uuid": "f79f7678-55e7-432d-a15f-6e8ab2b7fe13",
       "users": [

examples/tunnel/client1-server-client2/client1.json

@@ -12,7 +12,7 @@
   },
   "endpoints": [
     {
-      "type": "tunnel_client",
+      "type": "tunnel-client",
       "tag": "tunnel",
       "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937",
       "key": "1c9b2ccf-b0c0-4c26-868d-a55a4edad3fe",

examples/tunnel/client1-server-client2/client2.json

@@ -12,7 +12,7 @@
   },
   "endpoints": [
     {
-      "type": "tunnel_client",
+      "type": "tunnel-client",
       "tag": "tunnel",
       "uuid": "487f6073-3300-4819-a07d-39652e45fb4d",
       "key": "3d74d616-2502-4c17-9cc3-92c366550f4f",

examples/tunnel/client1-server-client2/server.json

@@ -12,7 +12,7 @@
   },
   "endpoints": [
     {
-      "type": "tunnel_server",
+      "type": "tunnel-server",
       "tag": "tunnel",
       "uuid": "f79f7678-55e7-432d-a15f-6e8ab2b7fe13",
       "users": [

examples/tunnel/proxy_client-server-tunnel_client/server.json

@@ -12,7 +12,7 @@
   },
   "endpoints": [
     {
-      "type": "tunnel_server",
+      "type": "tunnel-server",
       "tag": "tunnel",
       "uuid": "f79f7678-55e7-432d-a15f-6e8ab2b7fe13",
       "users": [

examples/tunnel/proxy_client-server-tunnel_client/tunnel_client.json

@@ -12,7 +12,7 @@
   },
   "endpoints": [
     {
-      "type": "tunnel_client",
+      "type": "tunnel-client",
       "tag": "tunnel",
       "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937",
       "key": "1c9b2ccf-b0c0-4c26-868d-a55a4edad3fe",

examples/tunnel/server-client/client.json

@@ -1,6 +1,6 @@
 {
   "log": {
-    "level": "error"
+    "level": "info"
   },
   "dns": {
     "servers": [
@@ -12,7 +12,7 @@
   },
   "endpoints": [
     {
-      "type": "tunnel_client",
+      "type": "tunnel-client",
       "tag": "tunnel",
       "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937",
       "key": "1c9b2ccf-b0c0-4c26-868d-a55a4edad3fe",

examples/tunnel/server-client/server.json

@@ -1,6 +1,6 @@
 {
   "log": {
-    "level": "error"
+    "level": "info"
   },
   "dns": {
     "servers": [
@@ -12,7 +12,7 @@
   },
   "endpoints": [
     {
-      "type": "tunnel_server",
+      "type": "tunnel-server",
       "tag": "tunnel",
       "uuid": "f79f7678-55e7-432d-a15f-6e8ab2b7fe13",
       "users": [
@@ -39,7 +39,7 @@
     {
       "type": "mixed",
       "tag": "mixed-in",
-      "listen_port": 7897
+      "listen_port": 10000
     }
   ],
   "outbounds": [

examples/vless_encryption/client.json

@@ -0,0 +1,40 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      "type": "mixed",
+      "tag": "mixed-in",
+      "listen_port": 7897
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    },
+    {
+      "type": "vless",
+      "tag": "vless-out",
+      "server": "example.com",
+      "server_port": 443,
+      "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937",
+      "encryption": "", // xray vlessenc
+      "packet_encoding": ""
+    }
+  ],
+  "route": {
+    "final": "vless-out",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}

examples/vless_encryption/server.json

@@ -0,0 +1,39 @@
+{
+  "log": {
+    "level": "error"
+  },
+  "dns": {
+    "servers": [
+      {
+        "type": "local",
+        "tag": "default"
+      }
+    ]
+  },
+  "inbounds": [
+    {
+      "type": "vless",
+      "tag": "vless-in",
+      "listen": "0.0.0.0",
+      "listen_port": 443,
+      "decryption": "", // xray vlessenc
+      "users": [
+        {
+          "name": "user",
+          "uuid": "9b65b7e1-04c8-4717-8f45-2aa61fd25937"
+        }
+      ],
+    }
+  ],
+  "outbounds": [
+    {
+      "type": "direct",
+      "tag": "direct"
+    }
+  ],
+  "route": {
+    "final": "direct",
+    "default_domain_resolver": "default",
+    "auto_detect_interface": true
+  }
+}

examples/xhttp/client.json

@@ -28,7 +28,7 @@
       "server": "example.com",
       "server_port": 443,
       "uuid": "3179dce2-2ff9-413c-85b4-c1d53ed41668",
-      "tls": {
+      "tls": { // https://sing-box.sagernet.org/configuration/shared/tls/#outbound
         "enabled": true,
         "server_name": "example.com",
         "alpn": "h2" // h3 for QUIC
@@ -39,33 +39,65 @@
         "host": "example.com",
         "path": "/xhttp",
         "domain_strategy": "prefer_ipv4",
-        "xmux": {
-          "max_concurrency": "0-1",
-          "max_connections": "0-1",
-          "c_max_reuse_times": "0-1",
-          "h_max_request_times": "0-1",
-          "h_max_reusable_secs": "0-1",
-          "h_keep_alive_period": 60
+        "x_padding_bytes": "100-1000",
+        "no_grpc_header": false, // stream-up/one, client only
+        "sc_max_each_post_bytes": 1000000, // packet-up only
+        "sc_min_posts_interval_ms": 30, // packet-up, client only
+        "xmux": { // h2/h3 mainly, client only
+          "max_concurrency": "16-32",
+          "max_connections": 0,
+          "c_max_reuse_times": 0,
+          "h_max_request_times": "600-900",
+          "h_max_reusable_secs": "1800-3000",
+          "h_keep_alive_period": 0
         },
+        "x_padding_obfs_mode": false,
+        "x_padding_key": "",
+        "x_padding_header": "",
+        "x_padding_placement": "",
+        "x_padding_method": "",
+        "uplink_http_method": "",
+        "session_placement": "",
+        "session_key": "",
+        "seq_placement": "",
+        "seq_key": "",
+        "uplink_data_placement": "",
+        "uplink_data_key": "",
+        "uplink_chunk_size": 0,
+        "server": "example.com",
+        "server_port": 443,
         "download": {
           "host": "example.com",
           "path": "/xhttp",
           "domain_strategy": "prefer_ipv4",
-          "x_padding_bytes": "0-0",
-          "sc_max_each_post_bytes": "0-0",
-          "sc_min_posts_interval_ms": "0-0",
-          "sc_stream_up_server_secs": "0-0",
-          "xmux": {
-            "max_concurrency": "0-1",
-            "max_connections": "0-1",
-            "c_max_reuse_times": "0-1",
-            "h_max_request_times": "0-1",
-            "h_max_reusable_secs": "0-1",
-            "h_keep_alive_period": 60
+          "x_padding_bytes": "100-1000",
+          "no_grpc_header": false, // stream-up/one, client only
+          "sc_max_each_post_bytes": 1000000, // packet-up only
+          "sc_min_posts_interval_ms": 30, // packet-up, client only
+          "xmux": { // h2/h3 mainly, client only
+            "max_concurrency": "16-32",
+            "max_connections": 0,
+            "c_max_reuse_times": 0,
+            "h_max_request_times": "600-900",
+            "h_max_reusable_secs": "1800-3000",
+            "h_keep_alive_period": 0
           },
+          "x_padding_obfs_mode": false,
+          "x_padding_key": "",
+          "x_padding_header": "",
+          "x_padding_placement": "",
+          "x_padding_method": "",
+          "uplink_http_method": "",
+          "session_placement": "",
+          "session_key": "",
+          "seq_placement": "",
+          "seq_key": "",
+          "uplink_data_placement": "",
+          "uplink_data_key": "",
+          "uplink_chunk_size": 0,
           "server": "example.com",
           "server_port": 443,
-          "tls": {
+          "tls": { // https://sing-box.sagernet.org/configuration/shared/tls/#outbound
             "enabled": true,
             "server_name": "example.com",
             "alpn": "h2" // h3 for QUIC

examples/xhttp/server.json

@@ -22,7 +22,7 @@
           "uuid": "3179dce2-2ff9-413c-85b4-c1d53ed41668"
         }
       ],
-      "tls": {
+      "tls": { // https://sing-box.sagernet.org/configuration/shared/tls/#inbound
         "enabled": true,
         "server_name": "example.com",
         "alpn": "h2", // h3 for QUIC
@@ -33,6 +33,24 @@
         "type": "xhttp",
         "mode": "stream-up",
         "path": "/xhttp",
+        "x_padding_bytes": "100-1000",
+        "no_sse_header": false, // server only
+        "sc_max_each_post_bytes": 1000000, // packet-up only
+        "sc_max_buffered_posts": 30, // packet-up, server only
+        "sc_stream_up_server_secs": "20-80", // stream-up, server only
+        "x_padding_obfs_mode": false,
+        "x_padding_key": "",
+        "x_padding_header": "",
+        "x_padding_placement": "",
+        "x_padding_method": "",
+        "uplink_http_method": "",
+        "session_placement": "",
+        "session_key": "",
+        "seq_placement": "",
+        "seq_key": "",
+        "uplink_data_placement": "",
+        "uplink_data_key": "",
+        "uplink_chunk_size": 0,
       }
     }
   ],

go.mod

@@ -1,20 +1,26 @@
 module github.com/sagernet/sing-box
 
-go 1.24.4
-
-toolchain go1.24.6
+go 1.25
 
 require (
+	github.com/GoAdminGroup/go-admin v1.2.26
+	github.com/GoAdminGroup/themes v0.0.48
 	github.com/anytls/sing-anytls v0.0.11
 	github.com/caddyserver/certmagic v0.23.0
 	github.com/coder/websocket v1.8.13
 	github.com/cretz/bine v0.2.0
 	github.com/enfein/mieru/v3 v3.17.1
+	github.com/go-chi/chi v1.5.5
 	github.com/go-chi/chi/v5 v5.2.2
 	github.com/go-chi/render v1.0.3
+	github.com/go-playground/validator/v10 v10.30.1
 	github.com/godbus/dbus/v5 v5.1.1-0.20230522191255-76236955d466
 	github.com/gofrs/uuid/v5 v5.3.2
+	github.com/golang-migrate/migrate/v4 v4.19.1
+	github.com/huandu/go-sqlbuilder v1.38.1
 	github.com/insomniacslk/dhcp v0.0.0-20250417080101-5f8cf70e8c5f
+	github.com/klauspost/cpuid/v2 v2.3.0
+	github.com/lib/pq v1.10.9
 	github.com/libdns/alidns v1.0.5-libdns.v1.beta1
 	github.com/libdns/cloudflare v0.2.2-0.20250708034226-c574dccb31a6
 	github.com/logrusorgru/aurora v2.0.3+incompatible
@@ -30,33 +36,44 @@ require (
 	github.com/sagernet/gomobile v0.1.8
 	github.com/sagernet/gvisor v0.0.0-20250325023245-7a9c0f5725fb
 	github.com/sagernet/quic-go v0.52.0-sing-box-mod.3
-	github.com/sagernet/sing v0.7.14
+	github.com/sagernet/sing v0.7.18
 	github.com/sagernet/sing-mux v0.3.4
-	github.com/sagernet/sing-quic v0.5.2
+	github.com/sagernet/sing-quic v0.5.3
 	github.com/sagernet/sing-shadowsocks v0.2.8
 	github.com/sagernet/sing-shadowsocks2 v0.2.1
 	github.com/sagernet/sing-shadowtls v0.2.1-0.20250503051639-fcd445d33c11
-	github.com/sagernet/sing-tun v0.7.3
+	github.com/sagernet/sing-tun v0.7.11
 	github.com/sagernet/sing-vmess v0.2.7
 	github.com/sagernet/smux v1.5.50-sing-box-mod.1
 	github.com/sagernet/tailscale v1.80.3-sing-box-1.12-mod.2
 	github.com/sagernet/wireguard-go v0.0.1-beta.7
 	github.com/sagernet/ws v0.0.0-20231204124109-acfe8907c854
 	github.com/spf13/cobra v1.9.1
-	github.com/stretchr/testify v1.10.0
+	github.com/stretchr/testify v1.11.1
 	github.com/tidwall/gjson v1.18.0
 	github.com/vishvananda/netns v0.0.5
 	go.uber.org/zap v1.27.0
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba
-	golang.org/x/crypto v0.41.0
-	golang.org/x/exp v0.0.0-20250506013437-ce4c2cf36ca6
-	golang.org/x/mod v0.27.0
-	golang.org/x/net v0.43.0
-	golang.org/x/sys v0.35.0
+	golang.org/x/crypto v0.47.0
+	golang.org/x/exp v0.0.0-20260112195511-716be5621a96
+	golang.org/x/mod v0.32.0
+	golang.org/x/net v0.49.0
+	golang.org/x/sys v0.40.0
+	golang.org/x/time v0.12.0
 	golang.zx2c4.com/wireguard/wgctrl v0.0.0-20241231184526-a9ab2273dd10
-	google.golang.org/grpc v1.73.0
-	google.golang.org/protobuf v1.36.6
+	google.golang.org/grpc v1.78.0
+	google.golang.org/protobuf v1.36.11
 	howett.net/plist v1.0.1
+	lukechampine.com/blake3 v1.4.1
+)
+
+require (
+	github.com/jackc/puddle/v2 v2.2.2 // indirect
+	github.com/kr/pretty v0.3.1 // indirect
+	github.com/mattn/go-sqlite3 v2.0.3+incompatible // indirect
+	github.com/nxadm/tail v1.4.11 // indirect
+	github.com/zeebo/assert v1.3.0 // indirect
+	golang.org/x/xerrors v0.0.0-20240903120638-7835f813f4da // indirect
 )
 
 require (
@@ -65,19 +82,22 @@ require (
 	github.com/ameshkov/dnsstamps v1.0.3 // indirect
 	github.com/tidwall/match v1.1.1 // indirect
 	github.com/tidwall/pretty v1.2.0 // indirect
-	golang.org/x/sync v0.16.0 // indirect
-	golang.org/x/text v0.28.0 // indirect
-	golang.org/x/tools v0.36.0 // indirect
+	golang.org/x/sync v0.19.0 // indirect
+	golang.org/x/text v0.33.0 // indirect
+	golang.org/x/tools v0.41.0 // indirect
 )
 
 //replace github.com/sagernet/sing => ../sing
 
 require (
 	filippo.io/edwards25519 v1.1.0 // indirect
+	github.com/360EntSecGroup-Skylar/excelize v1.4.1 // indirect
+	github.com/GoAdminGroup/html v0.0.1 // indirect
+	github.com/NebulousLabs/fastrand v0.0.0-20181203155948-6fb6489aac4e // indirect
 	github.com/ajg/form v1.5.1 // indirect
 	github.com/akutz/memconn v0.1.0 // indirect
 	github.com/alexbrainman/sspi v0.0.0-20231016080023-1a75b4708caa // indirect
-	github.com/andybalholm/brotli v1.1.0 // indirect
+	github.com/andybalholm/brotli v1.2.0 // indirect
 	github.com/bits-and-blooms/bitset v1.13.0 // indirect
 	github.com/caddyserver/zerossl v0.1.3 // indirect
 	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
@@ -88,12 +108,19 @@ require (
 	github.com/digitalocean/go-smbios v0.0.0-20180907143718-390a4f403a8e // indirect
 	github.com/fsnotify/fsnotify v1.7.0 // indirect
 	github.com/fxamacker/cbor/v2 v2.7.0 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.12 // indirect
 	github.com/gaissmai/bart v0.11.1 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/gin-gonic/gin v1.3.0 // indirect
 	github.com/go-json-experiment/json v0.0.0-20250103232110-6a9a0fde9288 // indirect
 	github.com/go-ole/go-ole v1.3.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
 	github.com/gobwas/httphead v0.1.0 // indirect
 	github.com/gobwas/pool v0.2.1 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/golang/protobuf v1.5.4 // indirect
+	github.com/golang/snappy v1.0.0 // indirect
 	github.com/google/btree v1.1.3 // indirect
 	github.com/google/go-cmp v0.7.0 // indirect
 	github.com/google/go-querystring v1.1.0 // indirect
@@ -103,19 +130,30 @@ require (
 	github.com/gorilla/securecookie v1.1.2 // indirect
 	github.com/hashicorp/yamux v0.1.2 // indirect
 	github.com/hdevalence/ed25519consensus v0.2.0 // indirect
+	github.com/huandu/go-clone v1.7.3 // indirect
+	github.com/huandu/xstrings v1.4.0 // indirect
 	github.com/illarion/gonotify/v2 v2.0.3 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
+	github.com/jackc/pgx/v5 v5.8.0
 	github.com/jsimonetti/rtnetlink v1.4.0 // indirect
-	github.com/klauspost/compress v1.17.11 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.10 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/compress v1.18.3 // indirect
 	github.com/kortschak/wol v0.0.0-20200729010619-da482cc4850a // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
 	github.com/libdns/libdns v1.1.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mdlayher/genetlink v1.3.2 // indirect
 	github.com/mdlayher/netlink v1.7.3-0.20250113171957-fbb4dce95f42 // indirect
 	github.com/mdlayher/sdnotify v1.0.0 // indirect
 	github.com/mdlayher/socket v0.5.1 // indirect
 	github.com/mitchellh/go-ps v1.0.0 // indirect
-	github.com/pierrec/lz4/v4 v4.1.21 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826 // indirect
+	github.com/patrickmn/go-cache v2.1.0+incompatible
+	github.com/pierrec/lz4/v4 v4.1.25 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/prometheus-community/pro-bing v0.4.0 // indirect
 	github.com/quic-go/qpack v0.5.1 // indirect
@@ -123,6 +161,7 @@ require (
 	github.com/sagernet/netlink v0.0.0-20240612041022-b9a21c07ac6a // indirect
 	github.com/sagernet/nftables v0.3.0-beta.4 // indirect
 	github.com/spf13/pflag v1.0.6 // indirect
+	github.com/syndtr/goleveldb v1.0.0 // indirect
 	github.com/tailscale/certstore v0.1.1-0.20231202035212-d3fa0460f47e // indirect
 	github.com/tailscale/go-winio v0.0.0-20231025203758-c4f33415bf55 // indirect
 	github.com/tailscale/golang-x-crypto v0.0.0-20240604161659-3fde5e568aa4 // indirect
@@ -131,27 +170,34 @@ require (
 	github.com/tailscale/netlink v1.1.1-0.20240822203006-4d49adab4de7 // indirect
 	github.com/tailscale/peercred v0.0.0-20250107143737-35a0c7bd7edc // indirect
 	github.com/tailscale/web-client-prebuilt v0.0.0-20250124233751-d4cd19a26976 // indirect
-	github.com/tevino/abool v1.2.0 // indirect
 	github.com/u-root/uio v0.0.0-20240224005618-d2acac8f3701 // indirect
+	github.com/ugorji/go/codec v1.2.12 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
 	github.com/zeebo/blake3 v0.2.4 // indirect
-	go.uber.org/atomic v1.11.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	go.uber.org/zap/exp v0.3.0 // indirect
 	go4.org/mem v0.0.0-20240501181205-ae6ca9944745 // indirect
-	golang.org/x/term v0.34.0 // indirect
-	golang.org/x/time v0.11.0 // indirect
+	golang.org/x/term v0.39.0 // indirect
 	golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 // indirect
 	golang.zx2c4.com/wireguard/windows v0.5.3 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20250324211829-b45e905df463 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20251029180050-ab9386a59fda // indirect
+	gopkg.in/go-playground/validator.v8 v8.18.2 // indirect
+	gopkg.in/ini.v1 v1.67.0 // indirect
+	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	lukechampine.com/blake3 v1.4.1 // indirect
+	xorm.io/builder v0.3.7 // indirect
+	xorm.io/xorm v1.0.2 // indirect
 )
 
-replace github.com/sagernet/wireguard-go => github.com/shtorm-7/wireguard-go v0.0.1-beta.7-extended-1.1.0
+replace github.com/sagernet/wireguard-go => github.com/shtorm-7/wireguard-go v0.0.1-beta.7-extended-1.3.1
 
 replace github.com/sagernet/tailscale => github.com/shtorm-7/tailscale v1.80.3-sing-box-1.12-mod.2-extended-1.0.0
 
+replace github.com/sagernet/sing-mux => github.com/shtorm-7/sing-mux v0.3.4-extended-1.0.0
+
 replace github.com/sagernet/sing-dns => github.com/shtorm-7/sing-dns v0.4.6-extended-1.0.0
 
 replace github.com/ameshkov/dnscrypt/v2 => github.com/shtorm-7/dnscrypt/v2 v2.4.0-extended-1.0.0
+
+replace github.com/sagernet/sing-vmess => github.com/starifly/sing-vmess v0.2.7-mod.9

go.sum

@@ -1,19 +1,45 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.37.4/go.mod h1:NHPJ89PdicEuT9hdPXMROBD91xc5uRDxsMtSB16k7hw=
 filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
 filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
+gitea.com/xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a h1:lSA0F4e9A2NcQSqGqTOXqu2aRi/XEQxDCBwM8yJtE6s=
+gitea.com/xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a/go.mod h1:EXuID2Zs0pAQhH8yz+DNjUbjppKQzKFAn28TMYPB6IU=
+github.com/360EntSecGroup-Skylar/excelize v1.4.1 h1:l55mJb6rkkaUzOpSsgEeKYtS6/0gHwBYyfo5Jcjv/Ks=
+github.com/360EntSecGroup-Skylar/excelize v1.4.1/go.mod h1:vnax29X2usfl7HHkBrX5EvSCJcmH3dT9luvxzu8iGAE=
 github.com/AdguardTeam/golibs v0.32.7 h1:3dmGlAVgmvquCCwHsvEl58KKcRAK3z1UnjMnwSIeDH4=
 github.com/AdguardTeam/golibs v0.32.7/go.mod h1:bE8KV1zqTzgZjmjFyBJ9f9O5DEKO717r7e57j1HclJA=
+github.com/Azure/go-ansiterm v0.0.0-20230124172434-306776ec8161 h1:L/gRVlceqvL25UVaW/CKtUDjefjrs0SPonmDGUVOYP0=
+github.com/Azure/go-ansiterm v0.0.0-20230124172434-306776ec8161/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/GoAdminGroup/go-admin v1.2.26 h1:kk18rVrteLcrzH7iMM5p/13jghDC5n3DJG/7zAnbnEU=
+github.com/GoAdminGroup/go-admin v1.2.26/go.mod h1:QXj94ZrDclKzqwZnAGUWaK3qY1Wfr6/Qy5GnRGeXR+k=
+github.com/GoAdminGroup/html v0.0.1 h1:SdWNWl4OKPsvDk2GDp5ZKD6ceWoN8n4Pj6cUYxavUd0=
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+github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
 github.com/ajg/form v1.5.1 h1:t9c7v8JUKu/XxOGBU0yjNpaMloxGEJhUkqFRq0ibGeU=
 github.com/ajg/form v1.5.1/go.mod h1:uL1WgH+h2mgNtvBq0339dVnzXdBETtL2LeUXaIv25UY=
 github.com/akutz/memconn v0.1.0 h1:NawI0TORU4hcOMsMr11g7vwlCdkYeLKXBcxWu2W/P8A=
 github.com/akutz/memconn v0.1.0/go.mod h1:Jo8rI7m0NieZyLI5e2CDlRdRqRRB4S7Xp77ukDjH+Fw=
+github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alexbrainman/sspi v0.0.0-20231016080023-1a75b4708caa h1:LHTHcTQiSGT7VVbI0o4wBRNQIgn917usHWOd6VAffYI=
 github.com/alexbrainman/sspi v0.0.0-20231016080023-1a75b4708caa/go.mod h1:cEWa1LVoE5KvSD9ONXsZrj0z6KqySlCCNKHlLzbqAt4=
 github.com/ameshkov/dnsstamps v1.0.3 h1:Srzik+J9mivH1alRACTbys2xOxs0lRH9qnTA7Y1OYVo=
 github.com/ameshkov/dnsstamps v1.0.3/go.mod h1:Ii3eUu73dx4Vw5O4wjzmT5+lkCwovjzaEZZ4gKyIH5A=
-github.com/andybalholm/brotli v1.1.0 h1:eLKJA0d02Lf0mVpIDgYnqXcUn0GqVmEFny3VuID1U3M=
-github.com/andybalholm/brotli v1.1.0/go.mod h1:sms7XGricyQI9K10gOSf56VKKWS4oLer58Q+mhRPtnY=
+github.com/andybalholm/brotli v1.2.0 h1:ukwgCxwYrmACq68yiUqwIWnGY0cTPox/M94sVwToPjQ=
+github.com/andybalholm/brotli v1.2.0/go.mod h1:rzTDkvFWvIrjDXZHkuS16NPggd91W3kUSvPlQ1pLaKY=
 github.com/anytls/sing-anytls v0.0.11 h1:w8e9Uj1oP3m4zxkyZDewPk0EcQbvVxb7Nn+rapEx4fc=
 github.com/anytls/sing-anytls v0.0.11/go.mod h1:7rjN6IukwysmdusYsrV51Fgu1uW6vsrdd6ctjnEAln8=
+github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
+github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/bits-and-blooms/bitset v1.13.0 h1:bAQ9OPNFYbGHV6Nez0tmNI0RiEu7/hxlYJRUA0wFAVE=
 github.com/bits-and-blooms/bitset v1.13.0/go.mod h1:7hO7Gc7Pp1vODcmWvKMRA9BNmbv6a/7QIWpPxHddWR8=
 github.com/caddyserver/certmagic v0.23.0 h1:CfpZ/50jMfG4+1J/u2LV6piJq4HOfO6ppOnOf7DkFEU=
@@ -24,44 +50,93 @@ github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK3
 github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
 github.com/cilium/ebpf v0.15.0 h1:7NxJhNiBT3NG8pZJ3c+yfrVdHY8ScgKD27sScgjLMMk=
 github.com/cilium/ebpf v0.15.0/go.mod h1:DHp1WyrLeiBh19Cf/tfiSMhqheEiK8fXFZ4No0P1Hso=
+github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/coder/websocket v1.8.13 h1:f3QZdXy7uGVz+4uCJy2nTZyM0yTBj8yANEHhqlXZ9FE=
 github.com/coder/websocket v1.8.13/go.mod h1:LNVeNrXQZfe5qhS9ALED3uA+l5pPqvwXg3CKoDBB2gs=
+github.com/containerd/errdefs v1.0.0 h1:tg5yIfIlQIrxYtu9ajqY42W3lpS19XqdxRQeEwYG8PI=
+github.com/containerd/errdefs v1.0.0/go.mod h1:+YBYIdtsnF4Iw6nWZhJcqGSg/dwvV7tyJ/kCkyJ2k+M=
+github.com/containerd/errdefs/pkg v0.3.0 h1:9IKJ06FvyNlexW690DXuQNx2KA2cUJXx151Xdx3ZPPE=
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 github.com/coreos/go-iptables v0.7.1-0.20240112124308-65c67c9f46e6/go.mod h1:Qe8Bv2Xik5FyTXwgIbLAnv2sWSBmvWdFETJConOQ//Q=
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 github.com/cretz/bine v0.2.0 h1:8GiDRGlTgz+o8H9DSnsl+5MeBK4HsExxgl6WgzOCuZo=
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 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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 github.com/dblohm7/wingoes v0.0.0-20240119213807-a09d6be7affa h1:h8TfIT1xc8FWbwwpmHn1J5i43Y0uZP97GqasGCzSRJk=
 github.com/dblohm7/wingoes v0.0.0-20240119213807-a09d6be7affa/go.mod h1:Nx87SkVqTKd8UtT+xu7sM/l+LgXs6c0aHrlKusR+2EQ=
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@@ -270,69 +472,140 @@ go4.org/mem v0.0.0-20240501181205-ae6ca9944745 h1:Tl++JLUCe4sxGu8cTpDzRLd3tN7US4
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include/registry.go

@@ -19,10 +19,13 @@ import (
 	"github.com/sagernet/sing-box/option"
 	"github.com/sagernet/sing-box/protocol/anytls"
 	"github.com/sagernet/sing-box/protocol/block"
+	"github.com/sagernet/sing-box/protocol/bond"
 	"github.com/sagernet/sing-box/protocol/direct"
 	protocolDNS "github.com/sagernet/sing-box/protocol/dns"
 	"github.com/sagernet/sing-box/protocol/group"
 	"github.com/sagernet/sing-box/protocol/http"
+	"github.com/sagernet/sing-box/protocol/limiter/bandwidth"
+	"github.com/sagernet/sing-box/protocol/limiter/connection"
 	"github.com/sagernet/sing-box/protocol/mieru"
 	"github.com/sagernet/sing-box/protocol/mixed"
 	"github.com/sagernet/sing-box/protocol/naive"
@@ -37,6 +40,11 @@ import (
 	"github.com/sagernet/sing-box/protocol/tunnel"
 	"github.com/sagernet/sing-box/protocol/vless"
 	"github.com/sagernet/sing-box/protocol/vmess"
+	"github.com/sagernet/sing-box/service/admin_panel"
+	"github.com/sagernet/sing-box/service/manager"
+	"github.com/sagernet/sing-box/service/node"
+	nodeManagerClient "github.com/sagernet/sing-box/service/node_manager/client"
+	nodeManagerServer "github.com/sagernet/sing-box/service/node_manager/server"
 	"github.com/sagernet/sing-box/service/resolved"
 	"github.com/sagernet/sing-box/service/ssmapi"
 	E "github.com/sagernet/sing/common/exceptions"
@@ -66,6 +74,8 @@ func InboundRegistry() *inbound.Registry {
 	vless.RegisterInbound(registry)
 	anytls.RegisterInbound(registry)
 
+	bond.RegisterInbound(registry)
+
 	registerQUICInbounds(registry)
 	registerStubForRemovedInbounds(registry)
 
@@ -80,6 +90,7 @@ func OutboundRegistry() *outbound.Registry {
 	block.RegisterOutbound(registry)
 	protocolDNS.RegisterOutbound(registry)
 
+	group.RegisterFailover(registry)
 	group.RegisterSelector(registry)
 	group.RegisterURLTest(registry)
 
@@ -95,6 +106,11 @@ func OutboundRegistry() *outbound.Registry {
 	mieru.RegisterOutbound(registry)
 	anytls.RegisterOutbound(registry)
 
+	bond.RegisterOutbound(registry)
+
+	bandwidth.RegisterOutbound(registry)
+	connection.RegisterOutbound(registry)
+
 	registerQUICOutbounds(registry)
 	registerWireGuardOutbound(registry)
 	registerStubForRemovedOutbounds(registry)
@@ -137,6 +153,11 @@ func DNSTransportRegistry() *dns.TransportRegistry {
 func ServiceRegistry() *service.Registry {
 	registry := service.NewRegistry()
 
+	admin_panel.RegisterService(registry)
+	manager.RegisterService(registry)
+	node.RegisterService(registry)
+	nodeManagerClient.RegisterService(registry)
+	nodeManagerServer.RegisterService(registry)
 	resolved.RegisterService(registry)
 	ssmapi.RegisterService(registry)
 

log/id.go

@@ -13,6 +13,8 @@ func init() {
 }
 
 type idKey struct{}
+type muxIdKey struct{}
+type hwidKey struct{}
 
 type ID struct {
 	ID        uint32
@@ -34,3 +36,28 @@ func IDFromContext(ctx context.Context) (ID, bool) {
 	id, loaded := ctx.Value((*idKey)(nil)).(ID)
 	return id, loaded
 }
+
+func ContextWithNewMuxID(ctx context.Context) context.Context {
+	return ContextWithMuxID(ctx, ID{
+		ID:        rand.Uint32(),
+		CreatedAt: time.Now(),
+	})
+}
+
+func ContextWithMuxID(ctx context.Context, id ID) context.Context {
+	return context.WithValue(ctx, (*muxIdKey)(nil), id)
+}
+
+func MuxIDFromContext(ctx context.Context) (ID, bool) {
+	id, loaded := ctx.Value((*muxIdKey)(nil)).(ID)
+	return id, loaded
+}
+
+func ContextWithHWID(ctx context.Context, id ID) context.Context {
+	return context.WithValue(ctx, (*hwidKey)(nil), id)
+}
+
+func HWIDFromContext(ctx context.Context) (ID, bool) {
+	id, loaded := ctx.Value((*hwidKey)(nil)).(ID)
+	return id, loaded
+}

option/admin_panel.go

@@ -0,0 +1,13 @@
+package option
+
+type AdminPanelServiceOptions struct {
+	ListenOptions
+	Manager  string                    `json:"manager"`
+	Database AdminPanelServiceDatabase `json:"database"`
+	InboundTLSOptionsContainer
+}
+
+type AdminPanelServiceDatabase struct {
+	Driver string `json:"driver"`
+	DSN    string `json:"dsn"`
+}

option/bond.go

@@ -0,0 +1,16 @@
+package option
+
+type BondInboundOptions struct {
+	Inbounds []Inbound `json:"inbounds"`
+}
+
+type BondOutboundOptions struct {
+	Outbounds []BondOutbound `json:"outbounds"`
+}
+
+type BondOutbound struct {
+	Outbound      Outbound `json:"outbound"`
+	DownloadRatio uint8    `json:"download_ratio"`
+	UploadRatio   uint8    `json:"upload_ratio"`
+	Count         uint8    `json:"count"`
+}

option/group.go

@@ -16,3 +16,7 @@ type URLTestOutboundOptions struct {
 	IdleTimeout               badoption.Duration `json:"idle_timeout,omitempty"`
 	InterruptExistConnections bool               `json:"interrupt_exist_connections,omitempty"`
 }
+
+type FailoverOutboundOptions struct {
+	Outbounds []string `json:"outbounds"`
+}

option/limiter.go

@@ -0,0 +1,37 @@
+package option
+
+import (
+	"github.com/sagernet/sing/common/byteformats"
+)
+
+type BandwidthLimiterOutboundOptions struct {
+	Strategy       string                          `json:"strategy"`
+	Mode           string                          `json:"mode"`
+	ConnectionType string                          `json:"connection_type,omitempty"`
+	Speed          *byteformats.NetworkBytesCompat `json:"speed"`
+	Users          []BandwidthLimiterUser          `json:"users,omitempty"`
+	Route          RouteOptions                    `json:"route"`
+}
+
+type BandwidthLimiterUser struct {
+	Name           string                          `json:"name"`
+	Strategy       string                          `json:"strategy"`
+	Mode           string                          `json:"mode"`
+	ConnectionType string                          `json:"connection_type,omitempty"`
+	Speed          *byteformats.NetworkBytesCompat `json:"speed"`
+}
+
+type ConnectionLimiterOutboundOptions struct {
+	Strategy       string                  `json:"strategy"`
+	ConnectionType string                  `json:"connection_type,omitempty"`
+	Count          uint32                  `json:"count"`
+	Users          []ConnectionLimiterUser `json:"users,omitempty"`
+	Route          RouteOptions            `json:"route"`
+}
+
+type ConnectionLimiterUser struct {
+	Name           string `json:"name"`
+	Strategy       string `json:"strategy"`
+	ConnectionType string `json:"connection_type,omitempty"`
+	Count          uint32 `json:"count"`
+}

option/manager.go

@@ -0,0 +1,11 @@
+package option
+
+type ManagerServiceDatabase struct {
+	Driver string `json:"driver"`
+	DSN    string `json:"dsn"`
+}
+
+type ManagerServiceOptions struct {
+	Inbounds []string               `json:"inbounds"`
+	Database ManagerServiceDatabase `json:"database"`
+}

option/node.go

@@ -0,0 +1,9 @@
+package option
+
+type NodeServiceOptions struct {
+	UUID               string
+	Inbounds           []string `json:"inbounds"`
+	ConnectionLimiters []string `json:"connection_limiters"`
+	BandwidthLimiters  []string `json:"bandwidth_limiters"`
+	Manager            string   `json:"manager"`
+}

option/node_manager.go

@@ -0,0 +1,13 @@
+package option
+
+type NodeManagerServerServiceOptions struct {
+	ListenOptions
+	InboundTLSOptionsContainer
+	Manager string `json:"manager"`
+}
+
+type NodeManagerClientServiceOptions struct {
+	DialerOptions
+	ServerOptions
+	OutboundTLSOptionsContainer
+}

option/tun.go

@@ -11,33 +11,34 @@ import (
 )
 
 type TunInboundOptions struct {
-	InterfaceName          string                           `json:"interface_name,omitempty"`
-	MTU                    uint32                           `json:"mtu,omitempty"`
-	Address                badoption.Listable[netip.Prefix] `json:"address,omitempty"`
-	AutoRoute              bool                             `json:"auto_route,omitempty"`
-	IPRoute2TableIndex     int                              `json:"iproute2_table_index,omitempty"`
-	IPRoute2RuleIndex      int                              `json:"iproute2_rule_index,omitempty"`
-	AutoRedirect           bool                             `json:"auto_redirect,omitempty"`
-	AutoRedirectInputMark  FwMark                           `json:"auto_redirect_input_mark,omitempty"`
-	AutoRedirectOutputMark FwMark                           `json:"auto_redirect_output_mark,omitempty"`
-	LoopbackAddress        badoption.Listable[netip.Addr]   `json:"loopback_address,omitempty"`
-	StrictRoute            bool                             `json:"strict_route,omitempty"`
-	RouteAddress           badoption.Listable[netip.Prefix] `json:"route_address,omitempty"`
-	RouteAddressSet        badoption.Listable[string]       `json:"route_address_set,omitempty"`
-	RouteExcludeAddress    badoption.Listable[netip.Prefix] `json:"route_exclude_address,omitempty"`
-	RouteExcludeAddressSet badoption.Listable[string]       `json:"route_exclude_address_set,omitempty"`
-	IncludeInterface       badoption.Listable[string]       `json:"include_interface,omitempty"`
-	ExcludeInterface       badoption.Listable[string]       `json:"exclude_interface,omitempty"`
-	IncludeUID             badoption.Listable[uint32]       `json:"include_uid,omitempty"`
-	IncludeUIDRange        badoption.Listable[string]       `json:"include_uid_range,omitempty"`
-	ExcludeUID             badoption.Listable[uint32]       `json:"exclude_uid,omitempty"`
-	ExcludeUIDRange        badoption.Listable[string]       `json:"exclude_uid_range,omitempty"`
-	IncludeAndroidUser     badoption.Listable[int]          `json:"include_android_user,omitempty"`
-	IncludePackage         badoption.Listable[string]       `json:"include_package,omitempty"`
-	ExcludePackage         badoption.Listable[string]       `json:"exclude_package,omitempty"`
-	UDPTimeout             UDPTimeoutCompat                 `json:"udp_timeout,omitempty"`
-	Stack                  string                           `json:"stack,omitempty"`
-	Platform               *TunPlatformOptions              `json:"platform,omitempty"`
+	InterfaceName                         string                           `json:"interface_name,omitempty"`
+	MTU                                   uint32                           `json:"mtu,omitempty"`
+	Address                               badoption.Listable[netip.Prefix] `json:"address,omitempty"`
+	AutoRoute                             bool                             `json:"auto_route,omitempty"`
+	IPRoute2TableIndex                    int                              `json:"iproute2_table_index,omitempty"`
+	IPRoute2RuleIndex                     int                              `json:"iproute2_rule_index,omitempty"`
+	AutoRedirect                          bool                             `json:"auto_redirect,omitempty"`
+	AutoRedirectInputMark                 FwMark                           `json:"auto_redirect_input_mark,omitempty"`
+	AutoRedirectOutputMark                FwMark                           `json:"auto_redirect_output_mark,omitempty"`
+	AutoRedirectIPRoute2FallbackRuleIndex int                              `json:"auto_redirect_iproute2_fallback_rule_index,omitempty"`
+	LoopbackAddress                       badoption.Listable[netip.Addr]   `json:"loopback_address,omitempty"`
+	StrictRoute                           bool                             `json:"strict_route,omitempty"`
+	RouteAddress                          badoption.Listable[netip.Prefix] `json:"route_address,omitempty"`
+	RouteAddressSet                       badoption.Listable[string]       `json:"route_address_set,omitempty"`
+	RouteExcludeAddress                   badoption.Listable[netip.Prefix] `json:"route_exclude_address,omitempty"`
+	RouteExcludeAddressSet                badoption.Listable[string]       `json:"route_exclude_address_set,omitempty"`
+	IncludeInterface                      badoption.Listable[string]       `json:"include_interface,omitempty"`
+	ExcludeInterface                      badoption.Listable[string]       `json:"exclude_interface,omitempty"`
+	IncludeUID                            badoption.Listable[uint32]       `json:"include_uid,omitempty"`
+	IncludeUIDRange                       badoption.Listable[string]       `json:"include_uid_range,omitempty"`
+	ExcludeUID                            badoption.Listable[uint32]       `json:"exclude_uid,omitempty"`
+	ExcludeUIDRange                       badoption.Listable[string]       `json:"exclude_uid_range,omitempty"`
+	IncludeAndroidUser                    badoption.Listable[int]          `json:"include_android_user,omitempty"`
+	IncludePackage                        badoption.Listable[string]       `json:"include_package,omitempty"`
+	ExcludePackage                        badoption.Listable[string]       `json:"exclude_package,omitempty"`
+	UDPTimeout                            UDPTimeoutCompat                 `json:"udp_timeout,omitempty"`
+	Stack                                 string                           `json:"stack,omitempty"`
+	Platform                              *TunPlatformOptions              `json:"platform,omitempty"`
 	InboundOptions
 
 	// Deprecated: removed

option/v2ray_transport.go

@@ -2,10 +2,10 @@ package option
 
 import (
 	"net/http"
-	"net/url"
 	"strings"
 
 	Xbadoption "github.com/sagernet/sing-box/common/xray/json/badoption"
+	"github.com/sagernet/sing-box/common/xray/utils"
 	C "github.com/sagernet/sing-box/constant"
 	E "github.com/sagernet/sing/common/exceptions"
 	"github.com/sagernet/sing/common/json"
@@ -21,6 +21,7 @@ type _V2RayTransportOptions struct {
 	GRPCOptions        V2RayGRPCOptions        `json:"-"`
 	HTTPUpgradeOptions V2RayHTTPUpgradeOptions `json:"-"`
 	XHTTPOptions       V2RayXHTTPOptions       `json:"-"`
+	KCPOptions         V2RayKCPOptions         `json:"-"`
 }
 
 type V2RayTransportOptions _V2RayTransportOptions
@@ -40,6 +41,8 @@ func (o V2RayTransportOptions) MarshalJSON() ([]byte, error) {
 		v = o.HTTPUpgradeOptions
 	case C.V2RayTransportTypeXHTTP:
 		v = o.XHTTPOptions
+	case C.V2RayTransportTypeKCP:
+		v = o.KCPOptions
 	case "":
 		return nil, E.New("missing transport type")
 	default:
@@ -67,6 +70,8 @@ func (o *V2RayTransportOptions) UnmarshalJSON(bytes []byte) error {
 		v = &o.HTTPUpgradeOptions
 	case C.V2RayTransportTypeXHTTP:
 		v = &o.XHTTPOptions
+	case C.V2RayTransportTypeKCP:
+		v = &o.KCPOptions
 	default:
 		return E.New("unknown transport type: " + o.Type)
 	}
@@ -122,14 +127,29 @@ type V2RayXHTTPBaseOptions struct {
 	ScMaxBufferedPosts   int64                  `json:"sc_max_buffered_posts,omitempty"`
 	ScStreamUpServerSecs Xbadoption.Range       `json:"sc_stream_up_server_secs"`
 	Xmux                 *V2RayXHTTPXmuxOptions `json:"xmux"`
+	XPaddingObfsMode     bool                   `json:"x_padding_obfs_mode,omitempty"`
+	XPaddingKey          string                 `json:"x_padding_key,omitempty"`
+	XPaddingHeader       string                 `json:"x_padding_header,omitempty"`
+	XPaddingPlacement    string                 `json:"x_padding_placement,omitempty"`
+	XPaddingMethod       string                 `json:"x_padding_method,omitempty"`
+	UplinkHTTPMethod     string                 `json:"uplink_http_method,omitempty"`
+	SessionPlacement     string                 `json:"session_placement,omitempty"`
+	SessionKey           string                 `json:"session_key,omitempty"`
+	SeqPlacement         string                 `json:"seq_placement,omitempty"`
+	SeqKey               string                 `json:"seq_key,omitempty"`
+	UplinkDataPlacement  string                 `json:"uplink_data_placement,omitempty"`
+	UplinkDataKey        string                 `json:"uplink_data_key,omitempty"`
+	UplinkChunkSize      uint32                 `json:"uplink_chunk_size,omitempty"`
 }
 
-type V2RayXHTTPOptions struct {
+type _V2RayXHTTPOptions struct {
 	Mode string `json:"mode"`
 	V2RayXHTTPBaseOptions
 	Download *V2RayXHTTPDownloadOptions `json:"download"`
 }
 
+type V2RayXHTTPOptions _V2RayXHTTPOptions
+
 type V2RayXHTTPDownloadOptions struct {
 	V2RayXHTTPBaseOptions
 	ServerOptions
@@ -137,6 +157,158 @@ type V2RayXHTTPDownloadOptions struct {
 	Detour string `json:"detour,omitempty"`
 }
 
+const (
+	PlacementQueryInHeader = "queryInHeader"
+	PlacementCookie        = "cookie"
+	PlacementHeader        = "header"
+	PlacementQuery         = "query"
+	PlacementPath          = "path"
+	PlacementBody          = "body"
+)
+
+func (c V2RayXHTTPOptions) MarshalJSON() ([]byte, error) {
+	return json.Marshal((*_V2RayXHTTPOptions)(&c))
+}
+
+func (c *V2RayXHTTPOptions) UnmarshalJSON(bytes []byte) error {
+	err := json.Unmarshal(bytes, (*_V2RayXHTTPOptions)(c))
+	if err != nil {
+		return err
+	}
+	switch c.Mode {
+	case "":
+		c.Mode = "auto"
+	case "auto", "packet-up", "stream-up", "stream-one":
+	default:
+		return E.New("unsupported mode: " + c.Mode)
+	}
+	err = checkV2RayXHTTPBaseOptions(c.Mode, &c.V2RayXHTTPBaseOptions)
+	if err != nil {
+		return err
+	}
+	if c.Download != nil {
+		err = checkV2RayXHTTPBaseOptions(c.Mode, &c.Download.V2RayXHTTPBaseOptions)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func checkV2RayXHTTPBaseOptions(mode string, options *V2RayXHTTPBaseOptions) error {
+	// Priority (client): host > serverName > address
+	for k := range options.Headers {
+		if strings.ToLower(k) == "host" {
+			return E.New(`"headers" can't contain "host"`)
+		}
+	}
+	if options.XPaddingBytes.From <= 0 || options.XPaddingBytes.To <= 0 {
+		return E.New("x_padding_bytes cannot be disabled")
+	}
+	if options.XPaddingKey == "" {
+		options.XPaddingKey = "x_padding"
+	}
+	if options.XPaddingHeader == "" {
+		options.XPaddingHeader = "X-Padding"
+	}
+	switch options.XPaddingPlacement {
+	case "":
+		options.XPaddingPlacement = "queryInHeader"
+	case "cookie", "header", "query", "queryInHeader":
+	default:
+		return E.New("unsupported padding placement: " + options.XPaddingPlacement)
+	}
+	switch options.XPaddingMethod {
+	case "":
+		options.XPaddingMethod = "repeat-x"
+	case "repeat-x", "tokenish":
+	default:
+		return E.New("unsupported padding method: " + options.XPaddingMethod)
+	}
+	switch options.UplinkDataPlacement {
+	case "":
+		options.UplinkDataPlacement = "body"
+	case "body":
+	case "cookie", "header":
+		if mode != "packet-up" {
+			return E.New("uplink_data_placement can be " + options.UplinkDataPlacement + " only in packet-up mode")
+		}
+	default:
+		return E.New("unsupported uplink data placement: " + options.UplinkDataPlacement)
+	}
+	if options.UplinkHTTPMethod == "" {
+		options.UplinkHTTPMethod = "POST"
+	}
+	options.UplinkHTTPMethod = strings.ToUpper(options.UplinkHTTPMethod)
+	if options.UplinkHTTPMethod == "GET" && mode != "packet-up" {
+		return E.New("uplink_http_method can be GET only in packet-up mode")
+	}
+	switch options.SessionPlacement {
+	case "":
+		options.SessionPlacement = "path"
+	case "path", "cookie", "header", "query":
+	default:
+		return E.New("unsupported session placement: " + options.SessionPlacement)
+	}
+	switch options.SeqPlacement {
+	case "":
+		options.SeqPlacement = "path"
+	case "path":
+	case "cookie", "header", "query":
+		if options.SessionPlacement == "path" {
+			return E.New("seq_placement must be path when session_placement is path")
+		}
+	default:
+		return E.New("unsupported seq placement: " + options.SeqPlacement)
+	}
+	if options.SessionPlacement != "path" && options.SessionKey == "" {
+		switch options.SessionPlacement {
+		case "cookie", "query":
+			options.SessionKey = "x_session"
+		case "header":
+			options.SessionKey = "X-Session"
+		}
+	}
+	if options.SeqPlacement != "path" && options.SeqKey == "" {
+		switch options.SeqPlacement {
+		case "cookie", "query":
+			options.SeqKey = "x_seq"
+		case "header":
+			options.SeqKey = "X-Seq"
+		}
+	}
+	if options.UplinkDataPlacement != "body" && options.UplinkDataKey == "" {
+		switch options.UplinkDataPlacement {
+		case "cookie":
+			options.UplinkDataKey = "x_data"
+		case "header":
+			options.UplinkDataKey = "X-Data"
+		}
+	}
+	if options.UplinkChunkSize == 0 {
+		switch options.UplinkDataPlacement {
+		case "cookie":
+			options.UplinkChunkSize = 3 * 1024 // 3KB
+		case "header":
+			options.UplinkChunkSize = 4 * 1024 // 4KB
+		}
+	} else if options.UplinkChunkSize < 64 {
+		options.UplinkChunkSize = 64
+	}
+	if options.Xmux == nil {
+		options.Xmux = &V2RayXHTTPXmuxOptions{}
+		options.Xmux.MaxConcurrency.From = 1
+		options.Xmux.MaxConcurrency.To = 1
+		options.Xmux.HMaxRequestTimes.From = 600
+		options.Xmux.HMaxRequestTimes.To = 900
+		options.Xmux.HMaxReusableSecs.From = 1800
+		options.Xmux.HMaxReusableSecs.To = 3000
+	} else if options.Xmux.MaxConnections.To > 0 && options.Xmux.MaxConcurrency.To > 0 {
+		return E.New("max_connections cannot be specified together with max_concurrency")
+	}
+	return nil
+}
+
 func (c *V2RayXHTTPBaseOptions) GetNormalizedPath() string {
 	pathAndQuery := strings.SplitN(c.Path, "?", 2)
 	path := pathAndQuery[0]
@@ -158,19 +330,14 @@ func (c *V2RayXHTTPBaseOptions) GetNormalizedQuery() string {
 	return query
 }
 
-func (c *V2RayXHTTPBaseOptions) GetRequestHeader(rawURL string) http.Header {
+func (c *V2RayXHTTPBaseOptions) GetRequestHeader() http.Header {
 	header := http.Header{}
 	for k, v := range c.Headers {
 		header.Add(k, v)
 	}
-	u, _ := url.Parse(rawURL)
-	// https://www.rfc-editor.org/rfc/rfc7541.html#appendix-B
-	// h2's HPACK Header Compression feature employs a huffman encoding using a static table.
-	// 'X' is assigned an 8 bit code, so HPACK compression won't change actual padding length on the wire.
-	// https://www.rfc-editor.org/rfc/rfc9204.html#section-4.1.2-2
-	// h3's similar QPACK feature uses the same huffman table.
-	u.RawQuery = "x_padding=" + strings.Repeat("X", int(c.GetNormalizedXPaddingBytes().Rand()))
-	header.Set("Referer", u.String())
+	if header.Get("User-Agent") == "" {
+		header.Set("User-Agent", utils.ChromeUA)
+	}
 	return header
 }
 
@@ -184,6 +351,13 @@ func (c *V2RayXHTTPBaseOptions) GetNormalizedXPaddingBytes() Xbadoption.Range {
 	return c.XPaddingBytes
 }
 
+func (c *V2RayXHTTPBaseOptions) GetNormalizedUplinkHTTPMethod() string {
+	if c.UplinkHTTPMethod == "" {
+		return "POST"
+	}
+	return c.UplinkHTTPMethod
+}
+
 func (c *V2RayXHTTPBaseOptions) GetNormalizedScMaxEachPostBytes() Xbadoption.Range {
 	if c.ScMaxEachPostBytes.To == 0 {
 		return Xbadoption.Range{
@@ -222,6 +396,55 @@ func (c *V2RayXHTTPBaseOptions) GetNormalizedScStreamUpServerSecs() Xbadoption.R
 	return c.ScStreamUpServerSecs
 }
 
+func (c *V2RayXHTTPBaseOptions) GetNormalizedSessionPlacement() string {
+	if c.SessionPlacement == "" {
+		return PlacementPath
+	}
+	return c.SessionPlacement
+}
+
+func (c *V2RayXHTTPBaseOptions) GetNormalizedSeqPlacement() string {
+	if c.SeqPlacement == "" {
+		return PlacementPath
+	}
+	return c.SeqPlacement
+}
+
+func (c *V2RayXHTTPBaseOptions) GetNormalizedUplinkDataPlacement() string {
+	if c.UplinkDataPlacement == "" {
+		return PlacementBody
+	}
+	return c.UplinkDataPlacement
+}
+
+func (c *V2RayXHTTPBaseOptions) GetNormalizedSessionKey() string {
+	if c.SessionKey != "" {
+		return c.SessionKey
+	}
+	switch c.GetNormalizedSessionPlacement() {
+	case PlacementHeader:
+		return "X-Session"
+	case PlacementCookie, PlacementQuery:
+		return "x_session"
+	default:
+		return ""
+	}
+}
+
+func (c *V2RayXHTTPBaseOptions) GetNormalizedSeqKey() string {
+	if c.SeqKey != "" {
+		return c.SeqKey
+	}
+	switch c.GetNormalizedSeqPlacement() {
+	case PlacementHeader:
+		return "X-Seq"
+	case PlacementCookie, PlacementQuery:
+		return "x_seq"
+	default:
+		return ""
+	}
+}
+
 type V2RayXHTTPXmuxOptions struct {
 	MaxConcurrency   Xbadoption.Range `json:"max_concurrency"`
 	MaxConnections   Xbadoption.Range `json:"max_connections"`
@@ -250,3 +473,64 @@ func (m *V2RayXHTTPXmuxOptions) GetNormalizedHMaxRequestTimes() Xbadoption.Range
 func (m *V2RayXHTTPXmuxOptions) GetNormalizedHMaxReusableSecs() Xbadoption.Range {
 	return m.HMaxReusableSecs
 }
+
+type V2RayKCPOptions struct {
+	MTU              uint32 `json:"mtu,omitempty"`
+	TTI              uint32 `json:"tti,omitempty"`
+	UplinkCapacity   uint32 `json:"uplink_capacity,omitempty"`
+	DownlinkCapacity uint32 `json:"downlink_capacity,omitempty"`
+	Congestion       bool   `json:"congestion,omitempty"`
+	ReadBufferSize   uint32 `json:"read_buffer_size,omitempty"`
+	WriteBufferSize  uint32 `json:"write_buffer_size,omitempty"`
+	HeaderType       string `json:"header_type,omitempty"`
+	Seed             string `json:"seed,omitempty"`
+}
+
+func (k *V2RayKCPOptions) GetMTU() uint32 {
+	if k.MTU == 0 {
+		return 1350
+	}
+	return k.MTU
+}
+
+func (k *V2RayKCPOptions) GetTTI() uint32 {
+	if k.TTI == 0 {
+		return 50
+	}
+	return k.TTI
+}
+
+func (k *V2RayKCPOptions) GetUplinkCapacity() uint32 {
+	if k.UplinkCapacity == 0 {
+		return 12
+	}
+	return k.UplinkCapacity
+}
+
+func (k *V2RayKCPOptions) GetDownlinkCapacity() uint32 {
+	if k.DownlinkCapacity == 0 {
+		return 100
+	}
+	return k.DownlinkCapacity
+}
+
+func (k *V2RayKCPOptions) GetReadBufferSize() uint32 {
+	if k.ReadBufferSize == 0 {
+		return 1
+	}
+	return k.ReadBufferSize
+}
+
+func (k *V2RayKCPOptions) GetWriteBufferSize() uint32 {
+	if k.WriteBufferSize == 0 {
+		return 1
+	}
+	return k.WriteBufferSize
+}
+
+func (k *V2RayKCPOptions) GetHeaderType() string {
+	if k.HeaderType == "" {
+		return "none"
+	}
+	return k.HeaderType
+}

option/vless.go

@@ -2,7 +2,8 @@ package option
 
 type VLESSInboundOptions struct {
 	ListenOptions
-	Users []VLESSUser `json:"users,omitempty"`
+	Users      []VLESSUser `json:"users,omitempty"`
+	Decryption string      `json:"decryption,omitempty"`
 	InboundTLSOptionsContainer
 	Multiplex *InboundMultiplexOptions `json:"multiplex,omitempty"`
 	Transport *V2RayTransportOptions   `json:"transport,omitempty"`
@@ -17,9 +18,10 @@ type VLESSUser struct {
 type VLESSOutboundOptions struct {
 	DialerOptions
 	ServerOptions
-	UUID    string      `json:"uuid"`
-	Flow    string      `json:"flow,omitempty"`
-	Network NetworkList `json:"network,omitempty"`
+	UUID       string      `json:"uuid"`
+	Flow       string      `json:"flow,omitempty"`
+	Encryption string      `json:"encryption,omitempty"`
+	Network    NetworkList `json:"network,omitempty"`
 	OutboundTLSOptionsContainer
 	Multiplex      *OutboundMultiplexOptions `json:"multiplex,omitempty"`
 	Transport      *V2RayTransportOptions    `json:"transport,omitempty"`

option/wireguard.go

@@ -3,6 +3,7 @@ package option
 import (
 	"net/netip"
 
+	Xbadoption "github.com/sagernet/sing-box/common/xray/json/badoption"
 	"github.com/sagernet/sing/common/json/badoption"
 )
 
@@ -33,15 +34,17 @@ type WireGuardPeer struct {
 }
 
 type WireGuardWARPEndpointOptions struct {
-	System                     bool               `json:"system,omitempty"`
-	Name                       string             `json:"name,omitempty"`
-	ListenPort                 uint16             `json:"listen_port,omitempty"`
-	UDPTimeout                 badoption.Duration `json:"udp_timeout,omitempty"`
-	Workers                    int                `json:"workers,omitempty"`
-	PreallocatedBuffersPerPool uint32             `json:"preallocated_buffers_per_pool,omitempty"`
-	DisablePauses              bool               `json:"disable_pauses,omitempty"`
-	Amnezia                    *WireGuardAmnezia  `json:"amnezia,omitempty"`
-	Profile                    WARPProfile        `json:"profile,omitempty"`
+	System                      bool               `json:"system,omitempty"`
+	Name                        string             `json:"name,omitempty"`
+	ListenPort                  uint16             `json:"listen_port,omitempty"`
+	UDPTimeout                  badoption.Duration `json:"udp_timeout,omitempty"`
+	PersistentKeepaliveInterval uint16             `json:"persistent_keepalive_interval,omitempty"`
+	Reserved                    []uint8            `json:"reserved,omitempty"`
+	Workers                     int                `json:"workers,omitempty"`
+	PreallocatedBuffersPerPool  uint32             `json:"preallocated_buffers_per_pool,omitempty"`
+	DisablePauses               bool               `json:"disable_pauses,omitempty"`
+	Amnezia                     *WireGuardAmnezia  `json:"amnezia,omitempty"`
+	Profile                     WARPProfile        `json:"profile,omitempty"`
 	DialerOptions
 }
 
@@ -82,24 +85,24 @@ type LegacyWireGuardPeer struct {
 }
 
 type WireGuardAmnezia struct {
-	JC    int    `json:"jc,omitempty"`
-	JMin  int    `json:"jmin,omitempty"`
-	JMax  int    `json:"jmax,omitempty"`
-	S1    int    `json:"s1,omitempty"`
-	S2    int    `json:"s2,omitempty"`
-	S3    int    `json:"s3,omitempty"`
-	S4    int    `json:"s4,omitempty"`
-	H1    uint32 `json:"h1,omitempty"`
-	H2    uint32 `json:"h2,omitempty"`
-	H3    uint32 `json:"h3,omitempty"`
-	H4    uint32 `json:"h4,omitempty"`
-	I1    string `json:"i1,omitempty"`
-	I2    string `json:"i2,omitempty"`
-	I3    string `json:"i3,omitempty"`
-	I4    string `json:"i4,omitempty"`
-	I5    string `json:"i5,omitempty"`
-	J1    string `json:"j1,omitempty"`
-	J2    string `json:"j2,omitempty"`
-	J3    string `json:"j3,omitempty"`
-	ITime int64  `json:"itime,omitempty"`
+	JC    int               `json:"jc,omitempty"`
+	JMin  int               `json:"jmin,omitempty"`
+	JMax  int               `json:"jmax,omitempty"`
+	S1    int               `json:"s1,omitempty"`
+	S2    int               `json:"s2,omitempty"`
+	S3    int               `json:"s3,omitempty"`
+	S4    int               `json:"s4,omitempty"`
+	H1    *Xbadoption.Range `json:"h1,omitempty"`
+	H2    *Xbadoption.Range `json:"h2,omitempty"`
+	H3    *Xbadoption.Range `json:"h3,omitempty"`
+	H4    *Xbadoption.Range `json:"h4,omitempty"`
+	I1    string            `json:"i1,omitempty"`
+	I2    string            `json:"i2,omitempty"`
+	I3    string            `json:"i3,omitempty"`
+	I4    string            `json:"i4,omitempty"`
+	I5    string            `json:"i5,omitempty"`
+	J1    string            `json:"j1,omitempty"`
+	J2    string            `json:"j2,omitempty"`
+	J3    string            `json:"j3,omitempty"`
+	ITime int64             `json:"itime,omitempty"`
 }

protocol/bond/conn.go

@@ -0,0 +1,164 @@
+package bond
+
+import (
+	"encoding/binary"
+	"errors"
+	"io"
+	"net"
+	"time"
+)
+
+type bondedConn struct {
+	conns          []net.Conn
+	downloadRatios []uint8
+	uploadRatios   []uint8
+
+	readBuffer []byte
+	readOffset int
+	readSize   int
+}
+
+func NewBondedConn(conns []net.Conn, downloadRatios, uploadRatios []uint8) *bondedConn {
+	return &bondedConn{
+		conns:          conns,
+		downloadRatios: downloadRatios,
+		uploadRatios:   uploadRatios,
+		readBuffer:     make([]byte, 65535),
+	}
+}
+
+func (c *bondedConn) Read(b []byte) (n int, err error) {
+	if c.readOffset == c.readSize {
+		var header [2]byte
+		_, err := io.ReadFull(c.conns[0], header[:])
+		if err != nil {
+			return 0, err
+		}
+		size := int(binary.BigEndian.Uint16(header[:]))
+		chunkLens := splitByRatios(size, c.downloadRatios)
+		total := 0
+		for i, chunkLen := range chunkLens {
+			if chunkLen == 0 {
+				continue
+			}
+			chunk := c.readBuffer[total : total+chunkLen]
+			n, err := io.ReadFull(c.conns[i], chunk)
+			total += n
+			if err != nil {
+				return total, err
+			}
+		}
+		c.readOffset = 0
+		c.readSize = size
+	}
+	n = copy(b, c.readBuffer[c.readOffset:c.readSize])
+	c.readOffset += n
+	return n, nil
+}
+
+func (c *bondedConn) Write(b []byte) (n int, err error) {
+	chunkLens := splitByRatios(len(b), c.uploadRatios)
+	var header [2]byte
+	binary.BigEndian.PutUint16(header[:], uint16(len(b)))
+	_, err = c.conns[0].Write(header[:])
+	if err != nil {
+		return 0, err
+	}
+	total := 0
+	for i, chunkLen := range chunkLens {
+		if chunkLen == 0 {
+			continue
+		}
+		chunk := b[total : total+chunkLen]
+		conn := c.conns[i]
+		subTotal := 0
+		for subTotal < len(chunk) {
+			n, err := conn.Write(chunk[subTotal:])
+			subTotal += n
+			total += n
+			if err != nil {
+				return total, err
+			}
+			if n == 0 {
+				return total, io.ErrUnexpectedEOF
+			}
+		}
+	}
+	return total, err
+}
+
+func (c *bondedConn) Close() error {
+	errs := make([]error, 0)
+	for _, conn := range c.conns {
+		err := conn.Close()
+		if err != nil {
+			errs = append(errs, err)
+		}
+	}
+	if len(errs) != 0 {
+		return errors.Join(errs...)
+	}
+	return nil
+}
+
+func (c *bondedConn) LocalAddr() net.Addr {
+	return nil
+}
+
+func (c *bondedConn) RemoteAddr() net.Addr {
+	return nil
+}
+
+func (c *bondedConn) SetDeadline(t time.Time) error {
+	errs := make([]error, 0)
+	for _, conn := range c.conns {
+		err := conn.SetDeadline(t)
+		if err != nil {
+			errs = append(errs, err)
+		}
+	}
+	if len(errs) != 0 {
+		return errors.Join(errs...)
+	}
+	return nil
+}
+
+func (c *bondedConn) SetReadDeadline(t time.Time) error {
+	errs := make([]error, 0)
+	for _, conn := range c.conns {
+		err := conn.SetReadDeadline(t)
+		if err != nil {
+			errs = append(errs, err)
+		}
+	}
+	if len(errs) != 0 {
+		return errors.Join(errs...)
+	}
+	return nil
+}
+
+func (c *bondedConn) SetWriteDeadline(t time.Time) error {
+	errs := make([]error, 0)
+	for _, conn := range c.conns {
+		err := conn.SetWriteDeadline(t)
+		if err != nil {
+			errs = append(errs, err)
+		}
+	}
+	if len(errs) != 0 {
+		return errors.Join(errs...)
+	}
+	return nil
+}
+
+func splitByRatios(number int, ratios []uint8) []int {
+	result := make([]int, len(ratios))
+	remaining := number
+	for i := 0; i < len(ratios)-1; i++ {
+		part := number * int(ratios[i]) / 100
+		result[i] = part
+		remaining -= part
+	}
+	result[len(ratios)-1] = remaining
+	return result
+}

protocol/bond/inbound.go

@@ -0,0 +1,155 @@
+package bond
+
+import (
+	"context"
+	"errors"
+	"net"
+	"time"
+
+	"github.com/patrickmn/go-cache"
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/adapter/inbound"
+	"github.com/sagernet/sing-box/common/kmutex"
+	"github.com/sagernet/sing-box/common/uot"
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	E "github.com/sagernet/sing/common/exceptions"
+	"github.com/sagernet/sing/common/logger"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/service"
+)
+
+func RegisterInbound(registry *inbound.Registry) {
+	inbound.Register[option.BondInboundOptions](registry, C.TypeBond, NewInbound)
+}
+
+type Inbound struct {
+	inbound.Adapter
+	logger   logger.ContextLogger
+	router   adapter.ConnectionRouterEx
+	inbounds []adapter.Inbound
+	conns    *cache.Cache
+
+	mtx *kmutex.Kmutex[string]
+}
+
+func NewInbound(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.BondInboundOptions) (adapter.Inbound, error) {
+	if len(options.Inbounds) == 0 {
+		return nil, E.New("missing tags")
+	}
+	inbound := &Inbound{
+		Adapter: inbound.NewAdapter(C.TypeBond, tag),
+		logger:  logger,
+		router:  uot.NewRouter(router, logger),
+		conns:   cache.New(C.TCPConnectTimeout, time.Second),
+		mtx:     kmutex.New[string](),
+	}
+	inboundRegistry := service.FromContext[adapter.InboundRegistry](ctx)
+	inbounds := make([]adapter.Inbound, len(options.Inbounds))
+	for i, inboundOptions := range options.Inbounds {
+		inbound, err := inboundRegistry.UnsafeCreate(ctx, NewRouter(router, logger, inbound.connHandler), logger, inboundOptions.Tag, inboundOptions.Type, inboundOptions.Options)
+		if err != nil {
+			return nil, err
+		}
+		inbounds[i] = inbound
+	}
+	inbound.inbounds = inbounds
+	inbound.conns.OnEvicted(func(s string, i interface{}) {
+		inbound.mtx.Lock(s)
+		defer inbound.mtx.Unlock(s)
+		ratioConns := i.(map[uint8]*ratioConn)
+		for _, ratioConn := range ratioConns {
+			if ratioConn != nil {
+				ratioConn.conn.Close()
+			}
+		}
+	})
+	return inbound, nil
+}
+
+func (h *Inbound) Start(stage adapter.StartStage) error {
+	for _, inbound := range h.inbounds {
+		err := inbound.Start(stage)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (h *Inbound) Close() error {
+	errs := make([]error, 0)
+	for _, inbound := range h.inbounds {
+		err := inbound.Close()
+		if err != nil {
+			errs = append(errs, err)
+		}
+	}
+	if len(errs) != 0 {
+		return errors.Join(errs...)
+	}
+	return nil
+}
+
+func (h *Inbound) connHandler(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, onClose N.CloseHandlerFunc) error {
+	if metadata.Destination != Destination {
+		h.router.RouteConnectionEx(ctx, conn, metadata, onClose)
+		return nil
+	}
+	request, err := ReadRequest(conn)
+	if err != nil {
+		return err
+	}
+	requestUUID := request.UUID.String()
+	h.mtx.Lock(requestUUID)
+	var ratioConns map[uint8]*ratioConn
+	rawRatioConns, ok := h.conns.Get(requestUUID)
+	if ok {
+		ratioConns = rawRatioConns.(map[uint8]*ratioConn)
+	} else {
+		ratioConns = make(map[uint8]*ratioConn, request.Count)
+		h.conns.SetDefault(requestUUID, ratioConns)
+	}
+	ratioConns[request.Index] = &ratioConn{
+		conn:          conn,
+		downloadRatio: request.DownloadRatio,
+		uploadRatio:   request.UploadRatio,
+	}
+	if len(ratioConns) == int(request.Count) {
+		conns := make([]net.Conn, len(ratioConns))
+		downloadRatios := make([]uint8, len(ratioConns))
+		uploadRatios := make([]uint8, len(ratioConns))
+		var totalDownloadRatio, totalUploadRatio uint8
+		for index, ratioConn := range ratioConns {
+			conns[index] = ratioConn.conn
+			downloadRatios[index] = ratioConn.downloadRatio
+			uploadRatios[index] = ratioConn.uploadRatio
+			totalDownloadRatio += ratioConn.downloadRatio
+			totalUploadRatio += ratioConn.uploadRatio
+			delete(ratioConns, index)
+		}
+		if totalDownloadRatio != 100 || totalUploadRatio != 100 {
+			for _, conn := range conns {
+				conn.Close()
+			}
+			h.mtx.Unlock(requestUUID)
+			return E.New("invalid ratios")
+		}
+		conn = NewBondedConn(conns, downloadRatios, uploadRatios)
+		metadata.Inbound = h.Tag()
+		metadata.InboundType = C.TypeBond
+		metadata.Destination = request.Destination
+		h.mtx.Unlock(requestUUID)
+		h.router.RouteConnectionEx(ctx, conn, metadata, onClose)
+		return nil
+	}
+	h.mtx.Unlock(requestUUID)
+	return nil
+}
+
+type ratioConn struct {
+	conn          net.Conn
+	downloadRatio uint8
+	uploadRatio   uint8
+}

protocol/bond/outbound.go

@@ -0,0 +1,152 @@
+package bond
+
+import (
+	"context"
+	"errors"
+	"net"
+	"sync"
+
+	"github.com/gofrs/uuid/v5"
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/adapter/outbound"
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing/common"
+	E "github.com/sagernet/sing/common/exceptions"
+	"github.com/sagernet/sing/common/logger"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/common/uot"
+	"github.com/sagernet/sing/service"
+)
+
+func RegisterOutbound(registry *outbound.Registry) {
+	outbound.Register[option.BondOutboundOptions](registry, C.TypeBond, NewOutbound)
+}
+
+type Outbound struct {
+	outbound.Adapter
+	ctx            context.Context
+	logger         logger.ContextLogger
+	outbounds      []adapter.Outbound
+	downloadRatios []uint8
+	uploadRatios   []uint8
+	uotClient      *uot.Client
+}
+
+func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.BondOutboundOptions) (adapter.Outbound, error) {
+	outboundRegistry := service.FromContext[adapter.OutboundRegistry](ctx)
+	outbounds := make([]adapter.Outbound, 0, len(options.Outbounds))
+	downloadRatios := make([]uint8, 0, len(options.Outbounds))
+	uploadRatios := make([]uint8, 0, len(options.Outbounds))
+	var totalDownloadRatio, totalUploadRatio uint8
+	for _, outboundOptions := range options.Outbounds {
+		count := outboundOptions.Count
+		if count == 0 {
+			count = 1
+		}
+		for range count {
+			outbound, err := outboundRegistry.UnsafeCreateOutbound(ctx, router, logger, outboundOptions.Outbound.Tag, outboundOptions.Outbound.Type, outboundOptions.Outbound.Options)
+			if err != nil {
+				return nil, err
+			}
+			outbounds = append(outbounds, outbound)
+			downloadRatios = append(downloadRatios, outboundOptions.DownloadRatio)
+			uploadRatios = append(uploadRatios, outboundOptions.UploadRatio)
+			totalDownloadRatio += outboundOptions.DownloadRatio
+			totalUploadRatio += outboundOptions.UploadRatio
+		}
+	}
+	if totalDownloadRatio != 100 || totalUploadRatio != 100 {
+		return nil, E.New("invalid ratios")
+	}
+	outbound := &Outbound{
+		Adapter:        outbound.NewAdapter(C.TypeBond, tag, []string{N.NetworkTCP, N.NetworkUDP}, []string{}),
+		ctx:            ctx,
+		outbounds:      outbounds,
+		downloadRatios: downloadRatios,
+		uploadRatios:   uploadRatios,
+		logger:         logger,
+	}
+	outbound.uotClient = &uot.Client{
+		Dialer:  outbound,
+		Version: uot.Version,
+	}
+	return outbound, nil
+}
+
+func (h *Outbound) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
+	if N.NetworkName(network) == N.NetworkUDP {
+		return h.uotClient.DialContext(ctx, network, destination)
+	}
+	conns := make([]net.Conn, len(h.outbounds))
+	connUUID, err := uuid.NewV4()
+	if err != nil {
+		return nil, err
+	}
+	errs := make([]error, 0, len(conns))
+	var mtx sync.Mutex
+	var wg sync.WaitGroup
+	for i, outbound := range h.outbounds {
+		wg.Go(
+			func() {
+				conn, err := outbound.DialContext(ctx, network, Destination)
+				if err != nil {
+					mtx.Lock()
+					errs = append(errs, err)
+					mtx.Unlock()
+					return
+				}
+				err = WriteRequest(
+					conn,
+					&Request{
+						UUID:          connUUID,
+						Index:         byte(i),
+						Count:         byte(len(h.outbounds)),
+						DownloadRatio: h.uploadRatios[i],
+						UploadRatio:   h.downloadRatios[i],
+						Destination:   destination,
+					},
+				)
+				if err != nil {
+					conn.Close()
+					mtx.Lock()
+					errs = append(errs, err)
+					mtx.Unlock()
+					return
+				}
+				conns[i] = conn
+			},
+		)
+	}
+	wg.Wait()
+	if len(errs) != 0 {
+		for _, conn := range conns {
+			if conn != nil {
+				conn.Close()
+			}
+		}
+		return nil, errors.Join(errs...)
+	}
+	conn := NewBondedConn(conns, h.downloadRatios, h.uploadRatios)
+	return conn, nil
+}
+
+func (h *Outbound) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
+	return h.uotClient.ListenPacket(ctx, destination)
+}
+
+func (h *Outbound) Close() error {
+	errs := make([]error, 0)
+	for _, outbound := range h.outbounds {
+		err := common.Close(outbound)
+		if err != nil {
+			errs = append(errs, err)
+		}
+	}
+	if len(errs) != 0 {
+		return errors.Join(errs...)
+	}
+	return nil
+}

protocol/bond/protocol.go

@@ -0,0 +1,100 @@
+package bond
+
+import (
+	"encoding/binary"
+	"io"
+
+	"github.com/gofrs/uuid/v5"
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/buf"
+	E "github.com/sagernet/sing/common/exceptions"
+	M "github.com/sagernet/sing/common/metadata"
+)
+
+const (
+	Version = 0
+)
+
+var Destination = M.Socksaddr{
+	Fqdn: "sp.bond.sing-box.arpa",
+	Port: 444,
+}
+
+var AddressSerializer = M.NewSerializer(
+	M.AddressFamilyByte(0x01, M.AddressFamilyIPv4),
+	M.AddressFamilyByte(0x03, M.AddressFamilyIPv6),
+	M.AddressFamilyByte(0x02, M.AddressFamilyFqdn),
+	M.PortThenAddress(),
+)
+
+type Request struct {
+	UUID          uuid.UUID
+	Index         byte
+	Count         byte
+	DownloadRatio byte
+	UploadRatio   byte
+	Destination   M.Socksaddr
+}
+
+func ReadRequest(reader io.Reader) (*Request, error) {
+	var request Request
+	var version uint8
+	err := binary.Read(reader, binary.BigEndian, &version)
+	if err != nil {
+		return nil, err
+	}
+	if version != Version {
+		return nil, E.New("unknown version: ", version)
+	}
+	_, err = io.ReadFull(reader, request.UUID[:])
+	if err != nil {
+		return nil, err
+	}
+	err = binary.Read(reader, binary.BigEndian, &request.Index)
+	if err != nil {
+		return nil, err
+	}
+	err = binary.Read(reader, binary.BigEndian, &request.Count)
+	if err != nil {
+		return nil, err
+	}
+	err = binary.Read(reader, binary.BigEndian, &request.DownloadRatio)
+	if err != nil {
+		return nil, err
+	}
+	err = binary.Read(reader, binary.BigEndian, &request.UploadRatio)
+	if err != nil {
+		return nil, err
+	}
+	request.Destination, err = AddressSerializer.ReadAddrPort(reader)
+	if err != nil {
+		return nil, err
+	}
+	return &request, nil
+}
+
+func WriteRequest(writer io.Writer, request *Request) error {
+	var requestLen int
+	requestLen += 1  // version
+	requestLen += 16 // UUID
+	requestLen += 1  // index
+	requestLen += 1  // count
+	requestLen += 1  // download ratio
+	requestLen += 1  // upload ratio
+	requestLen += AddressSerializer.AddrPortLen(request.Destination)
+	buffer := buf.NewSize(requestLen)
+	defer buffer.Release()
+	common.Must(
+		buffer.WriteByte(Version),
+		common.Error(buffer.Write(request.UUID[:])),
+		buffer.WriteByte(request.Index),
+		buffer.WriteByte(request.Count),
+		buffer.WriteByte(request.DownloadRatio),
+		buffer.WriteByte(request.UploadRatio),
+	)
+	err := AddressSerializer.WriteAddrPort(buffer, request.Destination)
+	if err != nil {
+		return err
+	}
+	return common.Error(writer.Write(buffer.Bytes()))
+}

protocol/bond/router.go

@@ -0,0 +1,41 @@
+package bond
+
+import (
+	"context"
+	"net"
+	"os"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing/common/logger"
+	N "github.com/sagernet/sing/common/network"
+)
+
+type Router struct {
+	adapter.Router
+	logger  logger.ContextLogger
+	handler func(context.Context, net.Conn, adapter.InboundContext, N.CloseHandlerFunc) error
+}
+
+func NewRouter(router adapter.Router, logger logger.ContextLogger, handler func(context.Context, net.Conn, adapter.InboundContext, N.CloseHandlerFunc) error) *Router {
+	return &Router{Router: router, logger: logger, handler: handler}
+}
+
+func (r *Router) RouteConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
+	return r.handler(ctx, conn, metadata, func(error) {})
+}
+
+func (r *Router) RoutePacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
+	return os.ErrInvalid
+}
+
+func (r *Router) RouteConnectionEx(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, onClose N.CloseHandlerFunc) {
+	if err := r.handler(ctx, conn, metadata, onClose); err != nil {
+		r.logger.ErrorContext(ctx, err)
+		N.CloseOnHandshakeFailure(conn, onClose, err)
+	}
+}
+
+func (r *Router) RoutePacketConnectionEx(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext, onClose N.CloseHandlerFunc) {
+	r.logger.ErrorContext(ctx, os.ErrInvalid)
+	N.CloseOnHandshakeFailure(conn, onClose, os.ErrInvalid)
+}

protocol/group/failover.go

@@ -0,0 +1,109 @@
+package group
+
+import (
+	"context"
+	"net"
+	"sync"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/adapter/outbound"
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	E "github.com/sagernet/sing/common/exceptions"
+	"github.com/sagernet/sing/common/logger"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/service"
+)
+
+func RegisterFailover(registry *outbound.Registry) {
+	outbound.Register[option.FailoverOutboundOptions](registry, C.TypeFailover, NewFailover)
+}
+
+var (
+	_ adapter.OutboundGroup = (*Failover)(nil)
+)
+
+type Failover struct {
+	outbound.Adapter
+	ctx              context.Context
+	outbound         adapter.OutboundManager
+	logger           logger.ContextLogger
+	tags             []string
+	outbounds        map[string]adapter.Outbound
+	lastUsedOutbound string
+
+	mtx sync.Mutex
+}
+
+func NewFailover(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.FailoverOutboundOptions) (adapter.Outbound, error) {
+	if len(options.Outbounds) == 0 {
+		return nil, E.New("missing tags")
+	}
+	outbound := &Failover{
+		Adapter:          outbound.NewAdapter(C.TypeFailover, tag, []string{N.NetworkTCP, N.NetworkUDP}, options.Outbounds),
+		ctx:              ctx,
+		outbound:         service.FromContext[adapter.OutboundManager](ctx),
+		logger:           logger,
+		tags:             options.Outbounds,
+		outbounds:        make(map[string]adapter.Outbound, len(options.Outbounds)),
+		lastUsedOutbound: options.Outbounds[0],
+	}
+	return outbound, nil
+}
+
+func (s *Failover) Start() error {
+	for i, tag := range s.tags {
+		outbound, loaded := s.outbound.Outbound(tag)
+		if !loaded {
+			return E.New("outbound ", i, " not found: ", tag)
+		}
+		s.outbounds[tag] = outbound
+	}
+	return nil
+}
+
+func (s *Failover) Now() string {
+	s.mtx.Lock()
+	defer s.mtx.Unlock()
+	return s.lastUsedOutbound
+}
+
+func (s *Failover) All() []string {
+	return s.tags
+}
+
+func (s *Failover) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
+	var conn net.Conn
+	var err error
+	for _, outbound := range s.outbounds {
+		conn, err = outbound.DialContext(ctx, network, destination)
+		if err != nil {
+			s.logger.ErrorContext(ctx, err)
+			continue
+		}
+		s.mtx.Lock()
+		defer s.mtx.Unlock()
+		s.lastUsedOutbound = outbound.Tag()
+		return conn, nil
+	}
+	return nil, err
+}
+
+func (s *Failover) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
+	var conn net.PacketConn
+	var err error
+	for _, outbound := range s.outbounds {
+		conn, err = outbound.ListenPacket(ctx, destination)
+		if err != nil {
+			s.logger.ErrorContext(ctx, err)
+			continue
+		}
+		s.mtx.Lock()
+		defer s.mtx.Unlock()
+		s.lastUsedOutbound = outbound.Tag()
+		return conn, nil
+	}
+	return nil, err
+}

protocol/hysteria/inbound.go

@@ -180,3 +180,11 @@ func (h *Inbound) Close() error {
 		common.PtrOrNil(h.service),
 	)
 }
+
+func (h *Inbound) UpdateUsers(users []option.HysteriaUser) {
+	h.service.UpdateUsers(common.MapIndexed(users, func(index int, _ option.HysteriaUser) int {
+		return index
+	}), common.Map(users, func(it option.HysteriaUser) string {
+		return it.AuthString
+	}))
+}

protocol/hysteria2/inbound.go

@@ -213,3 +213,11 @@ func (h *Inbound) Close() error {
 		common.PtrOrNil(h.service),
 	)
 }
+
+func (h *Inbound) UpdateUsers(users []option.Hysteria2User) {
+	h.service.UpdateUsers(common.MapIndexed(users, func(index int, _ option.Hysteria2User) int {
+		return index
+	}), common.Map(users, func(it option.Hysteria2User) string {
+		return it.Password
+	}))
+}

protocol/limiter/bandwidth/limiter.go

@@ -0,0 +1,158 @@
+package bandwidth
+
+import (
+	"context"
+	"net"
+
+	"golang.org/x/time/rate"
+)
+
+type connWithDownloadBandwidthLimiter struct {
+	net.Conn
+	ctx     context.Context
+	limiter *rate.Limiter
+	burst   int
+}
+
+func NewConnWithDownloadBandwidthLimiter(ctx context.Context, conn net.Conn, limiter *rate.Limiter) *connWithDownloadBandwidthLimiter {
+	return &connWithDownloadBandwidthLimiter{conn, ctx, limiter, limiter.Burst()}
+}
+
+func (conn *connWithDownloadBandwidthLimiter) Write(p []byte) (n int, err error) {
+	var nn int
+	for {
+		end := len(p)
+		if end == 0 {
+			break
+		}
+		if conn.burst < len(p) {
+			end = conn.burst
+		}
+		err = conn.limiter.WaitN(conn.ctx, end)
+		if err != nil {
+			return
+		}
+		nn, err = conn.Conn.Write(p[:end])
+		n += nn
+		if err != nil {
+			return
+		}
+		p = p[end:]
+	}
+	return
+}
+
+type connWithUploadBandwidthLimiter struct {
+	net.Conn
+	ctx     context.Context
+	limiter *rate.Limiter
+	burst   int
+}
+
+func NewConnWithUploadBandwidthLimiter(ctx context.Context, conn net.Conn, limiter *rate.Limiter) *connWithUploadBandwidthLimiter {
+	return &connWithUploadBandwidthLimiter{conn, ctx, limiter, limiter.Burst()}
+}
+
+func (conn *connWithUploadBandwidthLimiter) Read(p []byte) (n int, err error) {
+	if conn.burst < len(p) {
+		p = p[:conn.burst]
+	}
+	n, err = conn.Conn.Read(p)
+	if err != nil {
+		return
+	}
+	err = conn.limiter.WaitN(conn.ctx, n)
+	if err != nil {
+		return
+	}
+	return
+}
+
+type connWithCloseHandler struct {
+	net.Conn
+	onClose CloseHandlerFunc
+}
+
+func NewConnWithCloseHandler(conn net.Conn, onClose CloseHandlerFunc) *connWithCloseHandler {
+	return &connWithCloseHandler{conn, onClose}
+}
+
+func (conn *connWithCloseHandler) Close() error {
+	conn.onClose()
+	return conn.Conn.Close()
+}
+
+type packetConnWithDownloadBandwidthLimiter struct {
+	net.PacketConn
+	ctx     context.Context
+	limiter *rate.Limiter
+	burst   int
+}
+
+func NewPacketConnWithDownloadBandwidthLimiter(ctx context.Context, conn net.PacketConn, limiter *rate.Limiter) *packetConnWithDownloadBandwidthLimiter {
+	return &packetConnWithDownloadBandwidthLimiter{conn, ctx, limiter, limiter.Burst()}
+}
+
+func (conn *packetConnWithDownloadBandwidthLimiter) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	var nn int
+	for {
+		end := len(p)
+		if end == 0 {
+			break
+		}
+		if conn.burst < len(p) {
+			end = conn.burst
+		}
+		err = conn.limiter.WaitN(conn.ctx, end)
+		if err != nil {
+			return
+		}
+		nn, err = conn.PacketConn.WriteTo(p[:end], addr)
+		n += nn
+		if err != nil {
+			return
+		}
+		p = p[end:]
+	}
+	return
+}
+
+type packetConnWithUploadBandwidthLimiter struct {
+	net.PacketConn
+	ctx     context.Context
+	limiter *rate.Limiter
+	burst   int
+}
+
+func NewPacketConnWithUploadBandwidthLimiter(ctx context.Context, conn net.PacketConn, limiter *rate.Limiter) *packetConnWithUploadBandwidthLimiter {
+	return &packetConnWithUploadBandwidthLimiter{conn, ctx, limiter, limiter.Burst()}
+}
+
+func (conn *packetConnWithUploadBandwidthLimiter) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	if conn.burst < len(p) {
+		p = p[:conn.burst]
+	}
+	n, addr, err = conn.PacketConn.ReadFrom(p)
+	if err != nil {
+		return
+	}
+	err = conn.limiter.WaitN(conn.ctx, n)
+	if err != nil {
+		return
+	}
+	return
+}
+
+type packetConnWithCloseHandler struct {
+	net.PacketConn
+	onClose CloseHandlerFunc
+}
+
+func NewPacketConnWithCloseHandler(conn net.PacketConn, onClose CloseHandlerFunc) *packetConnWithCloseHandler {
+	return &packetConnWithCloseHandler{conn, onClose}
+}
+
+func (conn *packetConnWithCloseHandler) Close() error {
+	conn.onClose()
+	return conn.PacketConn.Close()
+}

protocol/limiter/bandwidth/outbound.go

@@ -0,0 +1,146 @@
+package bandwidth
+
+import (
+	"context"
+	"net"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/adapter/outbound"
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing-box/route"
+
+	"github.com/sagernet/sing/common/bufio"
+	E "github.com/sagernet/sing/common/exceptions"
+	"github.com/sagernet/sing/common/logger"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/service"
+)
+
+func RegisterOutbound(registry *outbound.Registry) {
+	outbound.Register[option.BandwidthLimiterOutboundOptions](registry, C.TypeBandwidthLimiter, NewOutbound)
+}
+
+type Outbound struct {
+	outbound.Adapter
+	ctx         context.Context
+	outbound    adapter.OutboundManager
+	connection  adapter.ConnectionManager
+	logger      logger.ContextLogger
+	strategy    BandwidthStrategy
+	outboundTag string
+	detour      adapter.Outbound
+	router      *route.Router
+}
+
+func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.BandwidthLimiterOutboundOptions) (adapter.Outbound, error) {
+	if options.Strategy == "" {
+		return nil, E.New("missing strategy")
+	}
+	if options.Route.Final == "" {
+		return nil, E.New("missing final outbound")
+	}
+	var strategy BandwidthStrategy
+	var err error
+	switch options.Strategy {
+	case "users":
+		usersStrategies := make(map[string]BandwidthStrategy, len(options.Users))
+		for _, user := range options.Users {
+			userStrategy, err := CreateStrategy(user.Strategy, user.Mode, user.ConnectionType, options.Speed.Value())
+			if err != nil {
+				return nil, err
+			}
+			usersStrategies[user.Name] = userStrategy
+		}
+		strategy = NewUsersBandwidthStrategy(usersStrategies)
+	case "manager":
+		strategy = NewManagerBandwidthStrategy()
+	default:
+		strategy, err = CreateStrategy(options.Strategy, options.Mode, options.ConnectionType, options.Speed.Value())
+		if err != nil {
+			return nil, err
+		}
+	}
+	logFactory := service.FromContext[log.Factory](ctx)
+	r := route.NewRouter(ctx, logFactory, options.Route, option.DNSOptions{})
+	err = r.Initialize(options.Route.Rules, options.Route.RuleSet)
+	if err != nil {
+		return nil, err
+	}
+	outbound := &Outbound{
+		Adapter:     outbound.NewAdapter(C.TypeBandwidthLimiter, tag, nil, []string{}),
+		ctx:         ctx,
+		outbound:    service.FromContext[adapter.OutboundManager](ctx),
+		connection:  service.FromContext[adapter.ConnectionManager](ctx),
+		logger:      logger,
+		strategy:    strategy,
+		outboundTag: options.Route.Final,
+		router:      r,
+	}
+	return outbound, nil
+}
+
+func (h *Outbound) Network() []string {
+	return []string{N.NetworkTCP, N.NetworkUDP}
+}
+
+func (h *Outbound) Start() error {
+	detour, loaded := h.outbound.Outbound(h.outboundTag)
+	if !loaded {
+		return E.New("outbound not found: ", h.outboundTag)
+	}
+	h.detour = detour
+	for _, stage := range []adapter.StartStage{adapter.StartStateStart, adapter.StartStatePostStart, adapter.StartStateStarted} {
+		err := h.router.Start(stage)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (h *Outbound) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
+	conn, err := h.detour.DialContext(ctx, network, destination)
+	if err != nil {
+		return nil, err
+	}
+	return h.strategy.wrapConn(ctx, conn, adapter.ContextFrom(ctx), true)
+}
+
+func (h *Outbound) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
+	conn, err := h.detour.ListenPacket(ctx, destination)
+	if err != nil {
+		return nil, err
+	}
+	return h.strategy.wrapPacketConn(ctx, conn, adapter.ContextFrom(ctx), true)
+}
+
+func (h *Outbound) NewConnectionEx(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, onClose N.CloseHandlerFunc) {
+	conn, err := h.strategy.wrapConn(ctx, conn, &metadata, false)
+	if err != nil {
+		h.logger.ErrorContext(ctx, err)
+		return
+	}
+	metadata.Inbound = h.Tag()
+	metadata.InboundType = h.Type()
+	h.router.RouteConnectionEx(ctx, conn, metadata, onClose)
+	return
+}
+
+func (h *Outbound) NewPacketConnectionEx(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext, onClose N.CloseHandlerFunc) {
+	packetConn, err := h.strategy.wrapPacketConn(ctx, bufio.NewNetPacketConn(conn), &metadata, false)
+	if err != nil {
+		h.logger.ErrorContext(ctx, err)
+		return
+	}
+	metadata.Inbound = h.Tag()
+	metadata.InboundType = h.Type()
+	h.router.RoutePacketConnectionEx(ctx, bufio.NewPacketConn(packetConn), metadata, onClose)
+	return
+}
+
+func (h *Outbound) GetStrategy() BandwidthStrategy {
+	return h.strategy
+}

protocol/limiter/bandwidth/strategy.go

@@ -0,0 +1,266 @@
+package bandwidth
+
+import (
+	"context"
+	"net"
+	"strconv"
+	"sync"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/log"
+	E "github.com/sagernet/sing/common/exceptions"
+	"golang.org/x/time/rate"
+)
+
+type (
+	CloseHandlerFunc  = func()
+	ConnIDGetter      = func(context.Context, *adapter.InboundContext) (string, bool)
+	ConnWrapper       = func(ctx context.Context, conn net.Conn, limiter *rate.Limiter, reverse bool) net.Conn
+	PacketConnWrapper = func(ctx context.Context, conn net.PacketConn, limiter *rate.Limiter, reverse bool) net.PacketConn
+)
+
+type BandwidthStrategy interface {
+	wrapConn(ctx context.Context, conn net.Conn, metadata *adapter.InboundContext, reverse bool) (net.Conn, error)
+	wrapPacketConn(ctx context.Context, conn net.PacketConn, metadata *adapter.InboundContext, reverse bool) (net.PacketConn, error)
+}
+
+type BandwidthLimiterStrategy interface {
+	getLimiter(ctx context.Context, metadata *adapter.InboundContext) (*rate.Limiter, CloseHandlerFunc, error)
+}
+
+type DefaultWrapStrategy struct {
+	limiterStrategy   BandwidthLimiterStrategy
+	connWrapper       ConnWrapper
+	packetConnWrapper PacketConnWrapper
+}
+
+func NewDefaultWrapStrategy(limiterStrategy BandwidthLimiterStrategy, connWrapper ConnWrapper, packetConnWrapper PacketConnWrapper) *DefaultWrapStrategy {
+	return &DefaultWrapStrategy{limiterStrategy, connWrapper, packetConnWrapper}
+}
+
+func (s *DefaultWrapStrategy) wrapConn(ctx context.Context, conn net.Conn, metadata *adapter.InboundContext, reverse bool) (net.Conn, error) {
+	limiter, onClose, err := s.limiterStrategy.getLimiter(ctx, metadata)
+	if err != nil {
+		return nil, err
+	}
+	return NewConnWithCloseHandler(s.connWrapper(ctx, conn, limiter, reverse), onClose), nil
+}
+
+func (s *DefaultWrapStrategy) wrapPacketConn(ctx context.Context, conn net.PacketConn, metadata *adapter.InboundContext, reverse bool) (net.PacketConn, error) {
+	limiter, onClose, err := s.limiterStrategy.getLimiter(ctx, metadata)
+	if err != nil {
+		return nil, err
+	}
+	return NewPacketConnWithCloseHandler(s.packetConnWrapper(ctx, conn, limiter, reverse), onClose), nil
+}
+
+type GlobalBandwidthStrategy struct {
+	limiter *rate.Limiter
+}
+
+func NewGlobalBandwidthStrategy(speed uint64) *GlobalBandwidthStrategy {
+	return &GlobalBandwidthStrategy{
+		limiter: createSpeedLimiter(speed),
+	}
+}
+
+func (s *GlobalBandwidthStrategy) getLimiter(ctx context.Context, metadata *adapter.InboundContext) (*rate.Limiter, CloseHandlerFunc, error) {
+	return s.limiter, func() {}, nil
+}
+
+type idBandwidthLimiter struct {
+	limiter *rate.Limiter
+	handles uint32
+}
+
+type ConnectionBandwidthStrategy struct {
+	limiters     map[string]*idBandwidthLimiter
+	connIDGetter ConnIDGetter
+	speed        uint64
+	mtx          sync.Mutex
+}
+
+func NewConnectionBandwidthStrategy(connIDGetter ConnIDGetter, speed uint64) *ConnectionBandwidthStrategy {
+	return &ConnectionBandwidthStrategy{
+		limiters:     make(map[string]*idBandwidthLimiter),
+		connIDGetter: connIDGetter,
+		speed:        speed,
+	}
+}
+
+func (s *ConnectionBandwidthStrategy) getLimiter(ctx context.Context, metadata *adapter.InboundContext) (*rate.Limiter, CloseHandlerFunc, error) {
+	s.mtx.Lock()
+	defer s.mtx.Unlock()
+	id, ok := s.connIDGetter(ctx, metadata)
+	if !ok {
+		return nil, nil, E.New("id not found")
+	}
+	limiter, ok := s.limiters[id]
+	if !ok {
+		limiter = &idBandwidthLimiter{
+			limiter: createSpeedLimiter(s.speed),
+		}
+		s.limiters[id] = limiter
+	}
+	limiter.handles++
+	var once sync.Once
+	return limiter.limiter, func() {
+		once.Do(func() {
+			s.mtx.Lock()
+			defer s.mtx.Unlock()
+			limiter.handles--
+			if limiter.handles == 0 {
+				delete(s.limiters, id)
+			}
+		})
+	}, nil
+}
+
+type UsersBandwidthStrategy struct {
+	strategies map[string]BandwidthStrategy
+	mtx        sync.Mutex
+}
+
+func NewUsersBandwidthStrategy(strategies map[string]BandwidthStrategy) *UsersBandwidthStrategy {
+	return &UsersBandwidthStrategy{
+		strategies: strategies,
+	}
+}
+
+func (s *UsersBandwidthStrategy) wrapConn(ctx context.Context, conn net.Conn, metadata *adapter.InboundContext, reverse bool) (net.Conn, error) {
+	strategy, err := s.getStrategy(ctx, metadata)
+	if err != nil {
+		return nil, err
+	}
+	return strategy.wrapConn(ctx, conn, metadata, reverse)
+}
+
+func (s *UsersBandwidthStrategy) wrapPacketConn(ctx context.Context, conn net.PacketConn, metadata *adapter.InboundContext, reverse bool) (net.PacketConn, error) {
+	strategy, err := s.getStrategy(ctx, metadata)
+	if err != nil {
+		return nil, err
+	}
+	return strategy.wrapPacketConn(ctx, conn, metadata, reverse)
+}
+
+func (s *UsersBandwidthStrategy) getStrategy(ctx context.Context, metadata *adapter.InboundContext) (BandwidthStrategy, error) {
+	s.mtx.Lock()
+	defer s.mtx.Unlock()
+	var user string
+	if metadata != nil {
+		user = metadata.User
+	}
+	strategy, ok := s.strategies[user]
+	if ok {
+		return strategy, nil
+	}
+	return nil, E.New("user strategy not found: ", user)
+}
+
+type ManagerBandwidthStrategy struct {
+	*UsersBandwidthStrategy
+}
+
+func NewManagerBandwidthStrategy() *ManagerBandwidthStrategy {
+	return &ManagerBandwidthStrategy{
+		UsersBandwidthStrategy: NewUsersBandwidthStrategy(map[string]BandwidthStrategy{}),
+	}
+}
+
+func (s *ManagerBandwidthStrategy) UpdateStrategies(strategies map[string]BandwidthStrategy) {
+	s.mtx.Lock()
+	defer s.mtx.Unlock()
+	s.strategies = strategies
+}
+
+func CreateStrategy(strategy string, mode string, connectionType string, speed uint64) (BandwidthStrategy, error) {
+	var limiterStrategy BandwidthLimiterStrategy
+	switch strategy {
+	case "global":
+		limiterStrategy = NewGlobalBandwidthStrategy(speed)
+	case "connection":
+		var connIDGetter ConnIDGetter
+		switch connectionType {
+		case "mux":
+			connIDGetter = func(ctx context.Context, metadata *adapter.InboundContext) (string, bool) {
+				id, ok := log.MuxIDFromContext(ctx)
+				if !ok {
+					return "", ok
+				}
+				return strconv.FormatUint(uint64(id.ID), 10), ok
+			}
+		case "hwid":
+			connIDGetter = func(ctx context.Context, metadata *adapter.InboundContext) (string, bool) {
+				id, ok := ctx.Value("hwid").(string)
+				return id, ok
+			}
+		case "ip":
+			connIDGetter = func(ctx context.Context, metadata *adapter.InboundContext) (string, bool) {
+				return metadata.Source.IPAddr().String(), true
+			}
+		default:
+			return nil, E.New("connection type not found: ", connectionType)
+		}
+		limiterStrategy = NewConnectionBandwidthStrategy(connIDGetter, speed)
+	default:
+		return nil, E.New("strategy not found: ", strategy)
+	}
+	var (
+		connWrapper       ConnWrapper
+		packetConnWrapper PacketConnWrapper
+	)
+	switch mode {
+	case "download":
+		connWrapper = connWithDownloadBandwidthWrapper
+		packetConnWrapper = packetConnWithDownloadBandwidthWrapper
+	case "upload":
+		connWrapper = connWithUploadBandwidthWrapper
+		packetConnWrapper = packetConnWithUploadBandwidthWrapper
+	case "duplex":
+		connWrapper = connWithDuplexBandwidthWrapper
+		packetConnWrapper = packetConnWithDuplexBandwidthWrapper
+	default:
+		return nil, E.New("mode not found: ", mode)
+	}
+	return NewDefaultWrapStrategy(limiterStrategy, connWrapper, packetConnWrapper), nil
+}
+
+func createSpeedLimiter(speed uint64) *rate.Limiter {
+	return rate.NewLimiter(rate.Limit(float64(speed)), 10000)
+}
+
+func connWithDownloadBandwidthWrapper(ctx context.Context, conn net.Conn, limiter *rate.Limiter, reverse bool) net.Conn {
+	if reverse {
+		return NewConnWithUploadBandwidthLimiter(ctx, conn, limiter)
+	}
+	return NewConnWithDownloadBandwidthLimiter(ctx, conn, limiter)
+}
+
+func connWithUploadBandwidthWrapper(ctx context.Context, conn net.Conn, limiter *rate.Limiter, reverse bool) net.Conn {
+	if reverse {
+		return NewConnWithDownloadBandwidthLimiter(ctx, conn, limiter)
+	}
+	return NewConnWithUploadBandwidthLimiter(ctx, conn, limiter)
+}
+
+func connWithDuplexBandwidthWrapper(ctx context.Context, conn net.Conn, limiter *rate.Limiter, reverse bool) net.Conn {
+	return NewConnWithUploadBandwidthLimiter(ctx, NewConnWithDownloadBandwidthLimiter(ctx, conn, limiter), limiter)
+}
+
+func packetConnWithDownloadBandwidthWrapper(ctx context.Context, conn net.PacketConn, limiter *rate.Limiter, reverse bool) net.PacketConn {
+	if reverse {
+		return NewPacketConnWithUploadBandwidthLimiter(ctx, conn, limiter)
+	}
+	return NewPacketConnWithDownloadBandwidthLimiter(ctx, conn, limiter)
+}
+
+func packetConnWithUploadBandwidthWrapper(ctx context.Context, conn net.PacketConn, limiter *rate.Limiter, reverse bool) net.PacketConn {
+	if reverse {
+		return NewPacketConnWithDownloadBandwidthLimiter(ctx, conn, limiter)
+	}
+	return NewPacketConnWithUploadBandwidthLimiter(ctx, conn, limiter)
+}
+
+func packetConnWithDuplexBandwidthWrapper(ctx context.Context, conn net.PacketConn, limiter *rate.Limiter, reverse bool) net.PacketConn {
+	return NewPacketConnWithUploadBandwidthLimiter(ctx, NewPacketConnWithDownloadBandwidthLimiter(ctx, conn, limiter), limiter)
+}

protocol/limiter/connection/lock.go

@@ -0,0 +1,37 @@
+package connection
+
+import (
+	"context"
+	"sync"
+
+	E "github.com/sagernet/sing/common/exceptions"
+)
+
+func NewDefaultLock(max uint32) LockIDGetter {
+	locks := make(map[string]*uint32)
+	mtx := sync.Mutex{}
+	return func(id string) (CloseHandlerFunc, context.Context, error) {
+		mtx.Lock()
+		defer mtx.Unlock()
+		handles, ok := locks[id]
+		if !ok {
+			if len(locks) == int(max) {
+				return nil, nil, E.New("not enough free locks")
+			}
+			handles = new(uint32)
+			locks[id] = handles
+		}
+		*handles++
+		var once sync.Once
+		return func() {
+			once.Do(func() {
+				mtx.Lock()
+				defer mtx.Unlock()
+				*handles--
+				if *handles == 0 {
+					delete(locks, id)
+				}
+			})
+		}, nil, nil
+	}
+}

protocol/limiter/connection/outbound.go

@@ -0,0 +1,204 @@
+package connection
+
+import (
+	"context"
+	"net"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/adapter/outbound"
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing-box/route"
+	"github.com/sagernet/sing/common/bufio"
+	E "github.com/sagernet/sing/common/exceptions"
+	"github.com/sagernet/sing/common/logger"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/service"
+)
+
+func RegisterOutbound(registry *outbound.Registry) {
+	outbound.Register[option.ConnectionLimiterOutboundOptions](registry, C.TypeConnectionLimiter, NewOutbound)
+}
+
+type Outbound struct {
+	outbound.Adapter
+	ctx         context.Context
+	outbound    adapter.OutboundManager
+	connection  adapter.ConnectionManager
+	logger      logger.ContextLogger
+	strategy    ConnectionStrategy
+	outboundTag string
+	detour      adapter.Outbound
+	router      *route.Router
+}
+
+func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.ConnectionLimiterOutboundOptions) (adapter.Outbound, error) {
+	if options.Strategy == "" {
+		return nil, E.New("missing strategy")
+	}
+	if options.Route.Final == "" {
+		return nil, E.New("missing final outbound")
+	}
+	var strategy ConnectionStrategy
+	var err error
+	switch options.Strategy {
+	case "users":
+		usersStrategies := make(map[string]ConnectionStrategy, len(options.Users))
+		for _, user := range options.Users {
+			userStrategy, err := CreateStrategy(user.Strategy, user.ConnectionType, NewDefaultLock(user.Count))
+			if err != nil {
+				return nil, err
+			}
+			usersStrategies[user.Name] = userStrategy
+		}
+		strategy = NewUsersConnectionStrategy(usersStrategies)
+	case "manager":
+		strategy = NewManagerConnectionStrategy()
+	default:
+		strategy, err = CreateStrategy(options.Strategy, options.ConnectionType, NewDefaultLock(options.Count))
+		if err != nil {
+			return nil, err
+		}
+	}
+	logFactory := service.FromContext[log.Factory](ctx)
+	r := route.NewRouter(ctx, logFactory, options.Route, option.DNSOptions{})
+	err = r.Initialize(options.Route.Rules, options.Route.RuleSet)
+	if err != nil {
+		return nil, err
+	}
+	outbound := &Outbound{
+		Adapter:     outbound.NewAdapter(C.TypeConnectionLimiter, tag, nil, []string{}),
+		ctx:         ctx,
+		outbound:    service.FromContext[adapter.OutboundManager](ctx),
+		connection:  service.FromContext[adapter.ConnectionManager](ctx),
+		logger:      logger,
+		outboundTag: options.Route.Final,
+		strategy:    strategy,
+		router:      r,
+	}
+	return outbound, nil
+}
+
+func (h *Outbound) Network() []string {
+	return []string{N.NetworkTCP, N.NetworkUDP}
+}
+
+func (h *Outbound) Start() error {
+	detour, loaded := h.outbound.Outbound(h.outboundTag)
+	if !loaded {
+		return E.New("outbound not found: ", h.outboundTag)
+	}
+	h.detour = detour
+	for _, stage := range []adapter.StartStage{adapter.StartStateStart, adapter.StartStatePostStart, adapter.StartStateStarted} {
+		err := h.router.Start(stage)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (h *Outbound) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
+	onClose, lockCtx, err := h.strategy.request(ctx, adapter.ContextFrom(ctx))
+	if err != nil {
+		return nil, err
+	}
+	conn, err := h.detour.DialContext(ctx, network, destination)
+	if err != nil {
+		onClose()
+		return nil, err
+	}
+	conn = newConnWithCloseHandlerFunc(conn, onClose)
+	if lockCtx != nil {
+		go connChecker(lockCtx, conn.Close)
+	}
+	return conn, nil
+}
+
+func (h *Outbound) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
+	onClose, lockCtx, err := h.strategy.request(ctx, adapter.ContextFrom(ctx))
+	if err != nil {
+		return nil, err
+	}
+	conn, err := h.detour.ListenPacket(ctx, destination)
+	if err != nil {
+		onClose()
+		return nil, err
+	}
+	conn = newPacketConnWithCloseHandlerFunc(conn, onClose)
+	if lockCtx != nil {
+		go connChecker(lockCtx, conn.Close)
+	}
+	return conn, nil
+}
+
+func (h *Outbound) NewConnectionEx(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, onClose N.CloseHandlerFunc) {
+	limiterOnClose, lockCtx, err := h.strategy.request(ctx, &metadata)
+	if err != nil {
+		h.logger.ErrorContext(ctx, err)
+		return
+	}
+	conn = newConnWithCloseHandlerFunc(conn, limiterOnClose)
+	if lockCtx != nil {
+		go connChecker(lockCtx, conn.Close)
+	}
+	metadata.Inbound = h.Tag()
+	metadata.InboundType = h.Type()
+	h.router.RouteConnectionEx(ctx, conn, metadata, onClose)
+	return
+}
+
+func (h *Outbound) NewPacketConnectionEx(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext, onClose N.CloseHandlerFunc) {
+	limiterOnClose, lockCtx, err := h.strategy.request(ctx, &metadata)
+	if err != nil {
+		h.logger.ErrorContext(ctx, err)
+		return
+	}
+	conn = bufio.NewPacketConn(newPacketConnWithCloseHandlerFunc(bufio.NewNetPacketConn(conn), limiterOnClose))
+	if lockCtx != nil {
+		go connChecker(lockCtx, conn.Close)
+	}
+	metadata.Inbound = h.Tag()
+	metadata.InboundType = h.Type()
+	h.router.RoutePacketConnectionEx(ctx, conn, metadata, onClose)
+	return
+}
+
+func (h *Outbound) GetStrategy() ConnectionStrategy {
+	return h.strategy
+}
+
+type connWithCloseHandlerFunc struct {
+	net.Conn
+	onClose CloseHandlerFunc
+}
+
+func newConnWithCloseHandlerFunc(conn net.Conn, onClose CloseHandlerFunc) *connWithCloseHandlerFunc {
+	return &connWithCloseHandlerFunc{conn, onClose}
+}
+
+func (conn *connWithCloseHandlerFunc) Close() error {
+	conn.onClose()
+	return conn.Conn.Close()
+}
+
+type packetConnWithCloseHandlerFunc struct {
+	net.PacketConn
+	onClose CloseHandlerFunc
+}
+
+func newPacketConnWithCloseHandlerFunc(conn net.PacketConn, onClose CloseHandlerFunc) *packetConnWithCloseHandlerFunc {
+	return &packetConnWithCloseHandlerFunc{conn, onClose}
+}
+
+func (conn *packetConnWithCloseHandlerFunc) Close() error {
+	conn.onClose()
+	return conn.PacketConn.Close()
+}
+
+func connChecker(ctx context.Context, closeFunc func() error) {
+	<-ctx.Done()
+	closeFunc()
+}

protocol/limiter/connection/strategy.go

@@ -0,0 +1,119 @@
+package connection
+
+import (
+	"context"
+	"strconv"
+	"sync"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/log"
+	E "github.com/sagernet/sing/common/exceptions"
+)
+
+type (
+	CloseHandlerFunc = func()
+
+	ConnIDGetter = func(context.Context, *adapter.InboundContext) (string, bool)
+	LockIDGetter = func(string) (CloseHandlerFunc, context.Context, error)
+
+	ConnectionStrategy interface {
+		request(ctx context.Context, metadata *adapter.InboundContext) (onClose CloseHandlerFunc, lockCtx context.Context, err error)
+	}
+)
+
+type DefaultConnectionStrategy struct {
+	connIDGetter ConnIDGetter
+	lockIDGetter LockIDGetter
+
+	mtx sync.Mutex
+}
+
+func NewDefaultConnectionStrategy(connIDGetter ConnIDGetter, lockIDGetter LockIDGetter) *DefaultConnectionStrategy {
+	outbound := &DefaultConnectionStrategy{
+		connIDGetter: connIDGetter,
+		lockIDGetter: lockIDGetter,
+	}
+	return outbound
+}
+
+func (s *DefaultConnectionStrategy) request(ctx context.Context, metadata *adapter.InboundContext) (CloseHandlerFunc, context.Context, error) {
+	s.mtx.Lock()
+	defer s.mtx.Unlock()
+	id, ok := s.connIDGetter(ctx, metadata)
+	if !ok {
+		return nil, nil, E.New("id not found")
+	}
+	return s.lockIDGetter(id)
+}
+
+type UsersConnectionStrategy struct {
+	strategies map[string]ConnectionStrategy
+	mtx        sync.Mutex
+}
+
+func NewUsersConnectionStrategy(strategies map[string]ConnectionStrategy) *UsersConnectionStrategy {
+	return &UsersConnectionStrategy{
+		strategies: strategies,
+	}
+}
+
+func (s *UsersConnectionStrategy) request(ctx context.Context, metadata *adapter.InboundContext) (CloseHandlerFunc, context.Context, error) {
+	s.mtx.Lock()
+	defer s.mtx.Unlock()
+	var user string
+	if metadata != nil {
+		user = metadata.User
+	}
+	strategy, ok := s.strategies[user]
+	if ok {
+		return strategy.request(ctx, metadata)
+	}
+	return nil, nil, E.New("user strategy not found: ", user)
+}
+
+type ManagerConnectionStrategy struct {
+	*UsersConnectionStrategy
+}
+
+func NewManagerConnectionStrategy() *ManagerConnectionStrategy {
+	return &ManagerConnectionStrategy{
+		UsersConnectionStrategy: NewUsersConnectionStrategy(map[string]ConnectionStrategy{}),
+	}
+}
+
+func (s *ManagerConnectionStrategy) UpdateStrategies(strategies map[string]ConnectionStrategy) {
+	s.mtx.Lock()
+	defer s.mtx.Unlock()
+	s.strategies = strategies
+}
+
+func CreateStrategy(strategy string, connectionType string, lockIDGetter LockIDGetter) (ConnectionStrategy, error) {
+	switch strategy {
+	case "connection":
+		var connIDGetter ConnIDGetter
+		switch connectionType {
+		case "mux":
+			connIDGetter = func(ctx context.Context, metadata *adapter.InboundContext) (string, bool) {
+				id, ok := log.MuxIDFromContext(ctx)
+				if !ok {
+					return "", ok
+				}
+				return strconv.FormatUint(uint64(id.ID), 10), ok
+			}
+		case "hwid":
+			connIDGetter = func(ctx context.Context, metadata *adapter.InboundContext) (string, bool) {
+				id, ok := ctx.Value("hwid").(string)
+				return id, ok
+			}
+		case "ip":
+			connIDGetter = func(ctx context.Context, metadata *adapter.InboundContext) (string, bool) {
+				return metadata.Source.IPAddr().String(), true
+			}
+		default:
+			return nil, E.New("connection type not found: ", connectionType)
+		}
+		return NewDefaultConnectionStrategy(connIDGetter, lockIDGetter), nil
+	default:
+		return nil, E.New("strategy not found: ", strategy)
+	}
+}

protocol/naive/inbound_conn.go

@@ -95,6 +95,7 @@ func (p *paddingConn) writeWithPadding(writer io.Writer, data []byte) (n int, er
 		binary.BigEndian.PutUint16(header, uint16(len(data)))
 		header[2] = byte(paddingSize)
 		common.Must1(buffer.Write(data))
+		buffer.Extend(paddingSize)
 		_, err = writer.Write(buffer.Bytes())
 		if err == nil {
 			n = len(data)

protocol/trojan/inbound.go

@@ -158,6 +158,14 @@ func (h *Inbound) Close() error {
 	)
 }
 
+func (h *Inbound) UpdateUsers(users []option.TrojanUser) {
+	h.service.UpdateUsers(common.MapIndexed(users, func(index int, _ option.TrojanUser) int {
+		return index
+	}), common.Map(users, func(it option.TrojanUser) string {
+		return it.Password
+	}))
+}
+
 func (h *Inbound) NewConnectionEx(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, onClose N.CloseHandlerFunc) {
 	if h.tlsConfig != nil && h.transport == nil {
 		tlsConn, err := tls.ServerHandshake(ctx, conn, h.tlsConfig)

protocol/tuic/inbound.go

@@ -170,3 +170,13 @@ func (h *Inbound) Close() error {
 		common.PtrOrNil(h.server),
 	)
 }
+
+func (h *Inbound) UpdateUsers(users []option.TUICUser) {
+	h.server.UpdateUsers(common.MapIndexed(users, func(index int, _ option.TUICUser) int {
+		return index
+	}), common.Map(users, func(it option.TUICUser) [16]byte {
+		return [16]byte(uuid.Must(uuid.FromString(it.UUID)).Bytes())
+	}), common.Map(users, func(it option.TUICUser) string {
+		return it.Password
+	}))
+}

protocol/tun/inbound.go

@@ -174,6 +174,10 @@ func NewInbound(ctx context.Context, router adapter.Router, logger log.ContextLo
 	if ruleIndex == 0 {
 		ruleIndex = tun.DefaultIPRoute2RuleIndex
 	}
+	autoRedirectFallbackRuleIndex := options.AutoRedirectIPRoute2FallbackRuleIndex
+	if autoRedirectFallbackRuleIndex == 0 {
+		autoRedirectFallbackRuleIndex = tun.DefaultIPRoute2AutoRedirectFallbackRuleIndex
+	}
 	inputMark := uint32(options.AutoRedirectInputMark)
 	if inputMark == 0 {
 		inputMark = tun.DefaultAutoRedirectInputMark
@@ -192,32 +196,33 @@ func NewInbound(ctx context.Context, router adapter.Router, logger log.ContextLo
 		logger:         logger,
 		inboundOptions: options.InboundOptions,
 		tunOptions: tun.Options{
-			Name:                     options.InterfaceName,
-			MTU:                      tunMTU,
-			GSO:                      enableGSO,
-			Inet4Address:             inet4Address,
-			Inet6Address:             inet6Address,
-			AutoRoute:                options.AutoRoute,
-			IPRoute2TableIndex:       tableIndex,
-			IPRoute2RuleIndex:        ruleIndex,
-			AutoRedirectInputMark:    inputMark,
-			AutoRedirectOutputMark:   outputMark,
-			Inet4LoopbackAddress:     common.Filter(options.LoopbackAddress, netip.Addr.Is4),
-			Inet6LoopbackAddress:     common.Filter(options.LoopbackAddress, netip.Addr.Is6),
-			StrictRoute:              options.StrictRoute,
-			IncludeInterface:         options.IncludeInterface,
-			ExcludeInterface:         options.ExcludeInterface,
-			Inet4RouteAddress:        inet4RouteAddress,
-			Inet6RouteAddress:        inet6RouteAddress,
-			Inet4RouteExcludeAddress: inet4RouteExcludeAddress,
-			Inet6RouteExcludeAddress: inet6RouteExcludeAddress,
-			IncludeUID:               includeUID,
-			ExcludeUID:               excludeUID,
-			IncludeAndroidUser:       options.IncludeAndroidUser,
-			IncludePackage:           options.IncludePackage,
-			ExcludePackage:           options.ExcludePackage,
-			InterfaceMonitor:         networkManager.InterfaceMonitor(),
-			EXP_MultiPendingPackets:  multiPendingPackets,
+			Name:                                  options.InterfaceName,
+			MTU:                                   tunMTU,
+			GSO:                                   enableGSO,
+			Inet4Address:                          inet4Address,
+			Inet6Address:                          inet6Address,
+			AutoRoute:                             options.AutoRoute,
+			IPRoute2TableIndex:                    tableIndex,
+			IPRoute2RuleIndex:                     ruleIndex,
+			IPRoute2AutoRedirectFallbackRuleIndex: autoRedirectFallbackRuleIndex,
+			AutoRedirectInputMark:                 inputMark,
+			AutoRedirectOutputMark:                outputMark,
+			Inet4LoopbackAddress:                  common.Filter(options.LoopbackAddress, netip.Addr.Is4),
+			Inet6LoopbackAddress:                  common.Filter(options.LoopbackAddress, netip.Addr.Is6),
+			StrictRoute:                           options.StrictRoute,
+			IncludeInterface:                      options.IncludeInterface,
+			ExcludeInterface:                      options.ExcludeInterface,
+			Inet4RouteAddress:                     inet4RouteAddress,
+			Inet6RouteAddress:                     inet6RouteAddress,
+			Inet4RouteExcludeAddress:              inet4RouteExcludeAddress,
+			Inet6RouteExcludeAddress:              inet6RouteExcludeAddress,
+			IncludeUID:                            includeUID,
+			ExcludeUID:                            excludeUID,
+			IncludeAndroidUser:                    options.IncludeAndroidUser,
+			IncludePackage:                        options.IncludePackage,
+			ExcludePackage:                        options.ExcludePackage,
+			InterfaceMonitor:                      networkManager.InterfaceMonitor(),
+			EXP_MultiPendingPackets:               multiPendingPackets,
 		},
 		udpTimeout:        udpTimeout,
 		stack:             options.Stack,
@@ -319,7 +324,6 @@ func (t *Inbound) Start(stage adapter.StartStage) error {
 			t.tunOptions.Name = tun.CalculateInterfaceName("")
 		}
 		if t.platformInterface == nil {
-			t.routeAddressSet = common.FlatMap(t.routeRuleSet, adapter.RuleSet.ExtractIPSet)
 			for _, routeRuleSet := range t.routeRuleSet {
 				ipSets := routeRuleSet.ExtractIPSet()
 				if len(ipSets) == 0 {
@@ -331,7 +335,6 @@ func (t *Inbound) Start(stage adapter.StartStage) error {
 					t.routeRuleSetCallback = append(t.routeRuleSetCallback, routeRuleSet.RegisterCallback(t.updateRouteAddressSet))
 				}
 			}
-			t.routeExcludeAddressSet = common.FlatMap(t.routeExcludeRuleSet, adapter.RuleSet.ExtractIPSet)
 			for _, routeExcludeRuleSet := range t.routeExcludeRuleSet {
 				ipSets := routeExcludeRuleSet.ExtractIPSet()
 				if len(ipSets) == 0 {

protocol/tunnel/client.go

@@ -3,13 +3,13 @@ package tunnel
 import (
 	"context"
 	"net"
-	"os"
 	"time"
 
 	"github.com/gofrs/uuid/v5"
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/adapter/endpoint"
 	"github.com/sagernet/sing-box/adapter/outbound"
+	sbUot "github.com/sagernet/sing-box/common/uot"
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
@@ -18,6 +18,7 @@ import (
 	"github.com/sagernet/sing/common/logger"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/common/uot"
 	"github.com/sagernet/sing/service"
 )
 
@@ -27,12 +28,13 @@ func RegisterClientEndpoint(registry *endpoint.Registry) {
 
 type ClientEndpoint struct {
 	outbound.Adapter
-	ctx      context.Context
-	outbound adapter.Outbound
-	router   adapter.ConnectionRouterEx
-	logger   logger.ContextLogger
-	uuid     uuid.UUID
-	key      uuid.UUID
+	ctx       context.Context
+	outbound  adapter.Outbound
+	router    adapter.ConnectionRouterEx
+	logger    logger.ContextLogger
+	uuid      uuid.UUID
+	key       uuid.UUID
+	uotClient *uot.Client
 }
 
 func NewClientEndpoint(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.TunnelClientEndpointOptions) (adapter.Endpoint, error) {
@@ -45,9 +47,9 @@ func NewClientEndpoint(ctx context.Context, router adapter.Router, logger log.Co
 		return nil, err
 	}
 	client := &ClientEndpoint{
-		Adapter: outbound.NewAdapter(C.TypeTunnelClient, tag, []string{N.NetworkTCP}, []string{}),
+		Adapter: outbound.NewAdapter(C.TypeTunnelClient, tag, []string{N.NetworkTCP, N.NetworkUDP}, []string{}),
 		ctx:     ctx,
-		router:  router,
+		router:  sbUot.NewRouter(router, logger),
 		logger:  logger,
 		uuid:    clientUUID,
 		key:     clientKey,
@@ -58,6 +60,10 @@ func NewClientEndpoint(ctx context.Context, router adapter.Router, logger log.Co
 		return nil, err
 	}
 	client.outbound = outbound
+	client.uotClient = &uot.Client{
+		Dialer:  outbound,
+		Version: uot.Version,
+	}
 	return client, nil
 }
 
@@ -85,8 +91,8 @@ func (c *ClientEndpoint) Start(stage adapter.StartStage) error {
 }
 
 func (c *ClientEndpoint) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
-	if network != N.NetworkTCP {
-		return nil, os.ErrInvalid
+	if N.NetworkName(network) == N.NetworkUDP {
+		return c.uotClient.DialContext(ctx, network, destination)
 	}
 	var destinationUUID *uuid.UUID
 	if metadata := adapter.ContextFrom(ctx); metadata != nil {
@@ -109,11 +115,14 @@ func (c *ClientEndpoint) DialContext(ctx context.Context, network string, destin
 		return nil, err
 	}
 	err = WriteRequest(conn, &Request{UUID: c.key, Command: CommandTCP, DestinationUUID: *destinationUUID, Destination: destination})
-	return conn, err
+	if err != nil {
+		return nil, err
+	}
+	return conn, nil
 }
 
 func (c *ClientEndpoint) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
-	return nil, os.ErrInvalid
+	return c.uotClient.ListenPacket(ctx, destination)
 }
 
 func (c *ClientEndpoint) Close() error {
@@ -139,6 +148,7 @@ func (c *ClientEndpoint) startInboundConn() error {
 
 func (c *ClientEndpoint) connHandler(conn net.Conn, request *Request) {
 	metadata := adapter.InboundContext{
+		Inbound:     c.Tag(),
 		Source:      M.ParseSocksaddr(conn.RemoteAddr().String()),
 		Destination: request.Destination,
 	}

protocol/tunnel/server.go

@@ -3,14 +3,13 @@ package tunnel
 import (
 	"context"
 	"net"
-	"os"
-	"sync"
 	"time"
 
 	"github.com/gofrs/uuid/v5"
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/adapter/endpoint"
 	"github.com/sagernet/sing-box/adapter/outbound"
+	sbUot "github.com/sagernet/sing-box/common/uot"
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
@@ -19,6 +18,7 @@ import (
 	"github.com/sagernet/sing/common/logger"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/common/uot"
 	"github.com/sagernet/sing/service"
 )
 
@@ -28,16 +28,15 @@ func RegisterServerEndpoint(registry *endpoint.Registry) {
 
 type ServerEndpoint struct {
 	outbound.Adapter
-	logger  logger.ContextLogger
-	inbound adapter.Inbound
-	router  adapter.Router
-	uuid    uuid.UUID
-	users   map[uuid.UUID]uuid.UUID
-	keys    map[uuid.UUID]uuid.UUID
-	conns   map[uuid.UUID]chan net.Conn
-	timeout time.Duration
-
-	mtx sync.Mutex
+	logger    logger.ContextLogger
+	inbound   adapter.Inbound
+	router    adapter.ConnectionRouterEx
+	uuid      uuid.UUID
+	users     map[uuid.UUID]uuid.UUID
+	keys      map[uuid.UUID]uuid.UUID
+	conns     map[uuid.UUID]chan net.Conn
+	timeout   time.Duration
+	uotClient *uot.Client
 }
 
 func NewServerEndpoint(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.TunnelServerEndpointOptions) (adapter.Endpoint, error) {
@@ -46,9 +45,9 @@ func NewServerEndpoint(ctx context.Context, router adapter.Router, logger log.Co
 		return nil, err
 	}
 	server := &ServerEndpoint{
-		Adapter: outbound.NewAdapter(C.TypeTunnelServer, tag, []string{N.NetworkTCP}, []string{}),
+		Adapter: outbound.NewAdapter(C.TypeTunnelServer, tag, []string{N.NetworkTCP, N.NetworkUDP}, []string{}),
 		logger:  logger,
-		router:  router,
+		router:  sbUot.NewRouter(router, logger),
 		uuid:    serverUUID,
 	}
 	inboundRegistry := service.FromContext[adapter.InboundRegistry](ctx)
@@ -78,6 +77,10 @@ func NewServerEndpoint(ctx context.Context, router adapter.Router, logger log.Co
 	} else {
 		server.timeout = C.TCPConnectTimeout
 	}
+	server.uotClient = &uot.Client{
+		Dialer:  server,
+		Version: uot.Version,
+	}
 	return server, nil
 }
 
@@ -86,8 +89,8 @@ func (s *ServerEndpoint) Start(stage adapter.StartStage) error {
 }
 
 func (s *ServerEndpoint) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
-	if network != N.NetworkTCP {
-		return nil, os.ErrInvalid
+	if N.NetworkName(network) == N.NetworkUDP {
+		return s.uotClient.DialContext(ctx, network, destination)
 	}
 	var sourceUUID *uuid.UUID
 	var ch chan net.Conn
@@ -97,13 +100,11 @@ func (s *ServerEndpoint) DialContext(ctx context.Context, network string, destin
 			if err != nil {
 				return nil, err
 			}
-			s.mtx.Lock()
 			var ok bool
 			ch, ok = s.conns[tunnelDestination]
 			if !ok {
 				return nil, E.New("user ", metadata.TunnelDestination, " not found")
 			}
-			s.mtx.Unlock()
 		}
 		if metadata.TunnelSource != "" {
 			tunnelSource, err := uuid.FromString(metadata.TunnelSource)
@@ -131,6 +132,7 @@ func (s *ServerEndpoint) DialContext(ctx context.Context, network string, destin
 		case conn := <-ch:
 			err := WriteRequest(conn, &Request{UUID: *sourceUUID, Command: CommandTCP, Destination: destination})
 			if err != nil {
+				conn.Close()
 				s.logger.ErrorContext(ctx, err)
 				continue
 			}
@@ -142,7 +144,7 @@ func (s *ServerEndpoint) DialContext(ctx context.Context, network string, destin
 }
 
 func (s *ServerEndpoint) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
-	return nil, os.ErrInvalid
+	return s.uotClient.ListenPacket(ctx, destination)
 }
 
 func (s *ServerEndpoint) Close() error {
@@ -159,8 +161,6 @@ func (s *ServerEndpoint) connHandler(ctx context.Context, conn net.Conn, metadat
 		return err
 	}
 	if request.Command == CommandInbound {
-		s.mtx.Lock()
-		defer s.mtx.Unlock()
 		uuid, ok := s.users[request.UUID]
 		if !ok {
 			return E.New("key ", request.UUID.String(), " not found")
@@ -183,14 +183,12 @@ func (s *ServerEndpoint) connHandler(ctx context.Context, conn net.Conn, metadat
 		if sourceUUID == request.DestinationUUID {
 			return E.New("routing loop on ", sourceUUID)
 		}
-		s.mtx.Lock()
 		if request.DestinationUUID != s.uuid {
 			_, ok = s.keys[request.DestinationUUID]
 			if !ok {
-				return E.New("user ", sourceUUID, " not found")
+				return E.New("user ", request.DestinationUUID, " not found")
 			}
 		}
-		s.mtx.Unlock()
 		metadata.Inbound = s.Tag()
 		metadata.InboundType = C.TypeTunnelServer
 		metadata.Destination = request.Destination

protocol/vless/encryption/client.go

@@ -0,0 +1,214 @@
+package encryption
+
+import (
+	"crypto/cipher"
+	"crypto/ecdh"
+	"crypto/mlkem"
+	"crypto/rand"
+	"io"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/sagernet/sing-box/common/xray/cpuid"
+	E "github.com/sagernet/sing/common/exceptions"
+	"lukechampine.com/blake3"
+)
+
+type ClientInstance struct {
+	NfsPKeys      []any
+	NfsPKeysBytes [][]byte
+	Hash32s       [][32]byte
+	RelaysLength  int
+	XorMode       uint32
+	Seconds       uint32
+	PaddingLens   [][3]int
+	PaddingGaps   [][3]int
+
+	RWLock sync.RWMutex
+	Expire time.Time
+	PfsKey []byte
+	Ticket []byte
+}
+
+func (i *ClientInstance) Init(nfsPKeysBytes [][]byte, xorMode, seconds uint32, padding string) (err error) {
+	if i.NfsPKeys != nil {
+		return E.New("already initialized")
+	}
+	l := len(nfsPKeysBytes)
+	if l == 0 {
+		return E.New("empty nfsPKeysBytes")
+	}
+	i.NfsPKeys = make([]any, l)
+	i.NfsPKeysBytes = nfsPKeysBytes
+	i.Hash32s = make([][32]byte, l)
+	for j, k := range nfsPKeysBytes {
+		if len(k) == 32 {
+			if i.NfsPKeys[j], err = ecdh.X25519().NewPublicKey(k); err != nil {
+				return
+			}
+			i.RelaysLength += 32 + 32
+		} else {
+			if i.NfsPKeys[j], err = mlkem.NewEncapsulationKey768(k); err != nil {
+				return
+			}
+			i.RelaysLength += 1088 + 32
+		}
+		i.Hash32s[j] = blake3.Sum256(k)
+	}
+	i.RelaysLength -= 32
+	i.XorMode = xorMode
+	i.Seconds = seconds
+	return ParsePadding(padding, &i.PaddingLens, &i.PaddingGaps)
+}
+
+func (i *ClientInstance) IsFullRandomXorMode() bool {
+	return i.XorMode == 2
+}
+
+func (i *ClientInstance) Handshake(conn net.Conn) (*CommonConn, error) {
+	if i.NfsPKeys == nil {
+		return nil, E.New("uninitialized")
+	}
+	c := NewCommonConn(conn, cpuid.HasAESGCM)
+
+	ivAndRealysLength := 16 + i.RelaysLength
+	pfsKeyExchangeLength := 18 + 1184 + 32 + 16
+	paddingLength, paddingLens, paddingGaps := CreatePadding(i.PaddingLens, i.PaddingGaps)
+	clientHello := make([]byte, ivAndRealysLength+pfsKeyExchangeLength+paddingLength)
+
+	iv := clientHello[:16]
+	rand.Read(iv)
+	relays := clientHello[16:ivAndRealysLength]
+	var nfsKey []byte
+	var lastCTR cipher.Stream
+	for j, k := range i.NfsPKeys {
+		var index = 32
+		if k, ok := k.(*ecdh.PublicKey); ok {
+			privateKey, _ := ecdh.X25519().GenerateKey(rand.Reader)
+			copy(relays, privateKey.PublicKey().Bytes())
+			var err error
+			nfsKey, err = privateKey.ECDH(k)
+			if err != nil {
+				return nil, err
+			}
+		}
+		if k, ok := k.(*mlkem.EncapsulationKey768); ok {
+			var ciphertext []byte
+			nfsKey, ciphertext = k.Encapsulate()
+			copy(relays, ciphertext)
+			index = 1088
+		}
+		if i.XorMode > 0 { // this xor can (others can't) be recovered by client's config, revealing an X25519 public key / ML-KEM-768 ciphertext, that's why "native" values
+			NewCTR(i.NfsPKeysBytes[j], iv).XORKeyStream(relays, relays[:index]) // make X25519 public key / ML-KEM-768 ciphertext distinguishable from random bytes
+		}
+		if lastCTR != nil {
+			lastCTR.XORKeyStream(relays, relays[:32]) // make this relay irreplaceable
+		}
+		if j == len(i.NfsPKeys)-1 {
+			break
+		}
+		lastCTR = NewCTR(nfsKey, iv)
+		lastCTR.XORKeyStream(relays[index:], i.Hash32s[j+1][:])
+		relays = relays[index+32:]
+	}
+	nfsAEAD := NewAEAD(iv, nfsKey, c.UseAES)
+
+	if i.Seconds > 0 {
+		i.RWLock.RLock()
+		if time.Now().Before(i.Expire) {
+			c.Client = i
+			c.UnitedKey = append(i.PfsKey, nfsKey...) // different unitedKey for each connection
+			nfsAEAD.Seal(clientHello[:ivAndRealysLength], nil, EncodeLength(32), nil)
+			nfsAEAD.Seal(clientHello[:ivAndRealysLength+18], nil, i.Ticket, nil)
+			i.RWLock.RUnlock()
+			c.PreWrite = clientHello[:ivAndRealysLength+18+32]
+			c.AEAD = NewAEAD(clientHello[ivAndRealysLength+18:ivAndRealysLength+18+32], c.UnitedKey, c.UseAES)
+			if i.XorMode == 2 {
+				c.Conn = NewXorConn(conn, NewCTR(c.UnitedKey, iv), nil, len(c.PreWrite), 16)
+			}
+			return c, nil
+		}
+		i.RWLock.RUnlock()
+	}
+
+	pfsKeyExchange := clientHello[ivAndRealysLength : ivAndRealysLength+pfsKeyExchangeLength]
+	nfsAEAD.Seal(pfsKeyExchange[:0], nil, EncodeLength(pfsKeyExchangeLength-18), nil)
+	mlkem768DKey, _ := mlkem.GenerateKey768()
+	x25519SKey, _ := ecdh.X25519().GenerateKey(rand.Reader)
+	pfsPublicKey := append(mlkem768DKey.EncapsulationKey().Bytes(), x25519SKey.PublicKey().Bytes()...)
+	nfsAEAD.Seal(pfsKeyExchange[:18], nil, pfsPublicKey, nil)
+
+	padding := clientHello[ivAndRealysLength+pfsKeyExchangeLength:]
+	nfsAEAD.Seal(padding[:0], nil, EncodeLength(paddingLength-18), nil)
+	nfsAEAD.Seal(padding[:18], nil, padding[18:paddingLength-16], nil)
+
+	paddingLens[0] = ivAndRealysLength + pfsKeyExchangeLength + paddingLens[0]
+	for i, l := range paddingLens { // sends padding in a fragmented way, to create variable traffic pattern, before inner VLESS flow takes control
+		if l > 0 {
+			if _, err := conn.Write(clientHello[:l]); err != nil {
+				return nil, err
+			}
+			clientHello = clientHello[l:]
+		}
+		if len(paddingGaps) > i {
+			time.Sleep(paddingGaps[i])
+		}
+	}
+
+	encryptedPfsPublicKey := make([]byte, 1088+32+16)
+	if _, err := io.ReadFull(conn, encryptedPfsPublicKey); err != nil {
+		return nil, err
+	}
+	nfsAEAD.Open(encryptedPfsPublicKey[:0], MaxNonce, encryptedPfsPublicKey, nil)
+	mlkem768Key, err := mlkem768DKey.Decapsulate(encryptedPfsPublicKey[:1088])
+	if err != nil {
+		return nil, err
+	}
+	peerX25519PKey, err := ecdh.X25519().NewPublicKey(encryptedPfsPublicKey[1088 : 1088+32])
+	if err != nil {
+		return nil, err
+	}
+	x25519Key, err := x25519SKey.ECDH(peerX25519PKey)
+	if err != nil {
+		return nil, err
+	}
+	pfsKey := make([]byte, 32+32) // no more capacity
+	copy(pfsKey, mlkem768Key)
+	copy(pfsKey[32:], x25519Key)
+	c.UnitedKey = append(pfsKey, nfsKey...)
+	c.AEAD = NewAEAD(pfsPublicKey, c.UnitedKey, c.UseAES)
+	c.PeerAEAD = NewAEAD(encryptedPfsPublicKey[:1088+32], c.UnitedKey, c.UseAES)
+
+	encryptedTicket := make([]byte, 32)
+	if _, err := io.ReadFull(conn, encryptedTicket); err != nil {
+		return nil, err
+	}
+	if _, err := c.PeerAEAD.Open(encryptedTicket[:0], nil, encryptedTicket, nil); err != nil {
+		return nil, err
+	}
+	seconds := DecodeLength(encryptedTicket)
+
+	if i.Seconds > 0 && seconds > 0 {
+		i.RWLock.Lock()
+		i.Expire = time.Now().Add(time.Duration(seconds) * time.Second)
+		i.PfsKey = pfsKey
+		i.Ticket = encryptedTicket[:16]
+		i.RWLock.Unlock()
+	}
+
+	encryptedLength := make([]byte, 18)
+	if _, err := io.ReadFull(conn, encryptedLength); err != nil {
+		return nil, err
+	}
+	if _, err := c.PeerAEAD.Open(encryptedLength[:0], nil, encryptedLength, nil); err != nil {
+		return nil, err
+	}
+	length := DecodeLength(encryptedLength[:2])
+	c.PeerPadding = make([]byte, length) // important: allows server sends padding slowly, eliminating 1-RTT's traffic pattern
+
+	if i.XorMode == 2 {
+		c.Conn = NewXorConn(conn, NewCTR(c.UnitedKey, iv), NewCTR(c.UnitedKey, encryptedTicket[:16]), 0, length)
+	}
+	return c, nil
+}

protocol/vless/encryption/common.go

@@ -0,0 +1,297 @@
+package encryption
+
+import (
+	"bytes"
+	"crypto/aes"
+	"crypto/cipher"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/sagernet/sing-box/common/xray/crypto"
+	E "github.com/sagernet/sing/common/exceptions"
+	"golang.org/x/crypto/chacha20poly1305"
+	"lukechampine.com/blake3"
+)
+
+var OutBytesPool = sync.Pool{
+	New: func() any {
+		return make([]byte, 5+8192+16)
+	},
+}
+
+type EncryptionConn interface {
+	net.Conn
+	IsEncryptionLayer() bool
+}
+
+type CommonConn struct {
+	net.Conn
+	UseAES      bool
+	Client      *ClientInstance
+	UnitedKey   []byte
+	PreWrite    []byte
+	AEAD        *AEAD
+	PeerAEAD    *AEAD
+	PeerPadding []byte
+	rawInput    bytes.Buffer
+	input       bytes.Reader
+}
+
+func NewCommonConn(conn net.Conn, useAES bool) *CommonConn {
+	return &CommonConn{
+		Conn:   conn,
+		UseAES: useAES,
+	}
+}
+
+func (c *CommonConn) Write(b []byte) (int, error) {
+	if len(b) == 0 {
+		return 0, nil
+	}
+	outBytes := OutBytesPool.Get().([]byte)
+	defer OutBytesPool.Put(outBytes)
+	for n := 0; n < len(b); {
+		b := b[n:]
+		if len(b) > 8192 {
+			b = b[:8192] // for avoiding another copy() in peer's Read()
+		}
+		n += len(b)
+		headerAndData := outBytes[:5+len(b)+16]
+		EncodeHeader(headerAndData, len(b)+16)
+		max := false
+		if bytes.Equal(c.AEAD.Nonce[:], MaxNonce) {
+			max = true
+		}
+		c.AEAD.Seal(headerAndData[:5], nil, b, headerAndData[:5])
+		if max {
+			c.AEAD = NewAEAD(headerAndData, c.UnitedKey, c.UseAES)
+		}
+		if c.PreWrite != nil {
+			headerAndData = append(c.PreWrite, headerAndData...)
+			c.PreWrite = nil
+		}
+		if _, err := c.Conn.Write(headerAndData); err != nil {
+			return 0, err
+		}
+	}
+	return len(b), nil
+}
+
+func (c *CommonConn) Read(b []byte) (int, error) {
+	if len(b) == 0 {
+		return 0, nil
+	}
+	if c.PeerAEAD == nil { // client's 0-RTT
+		serverRandom := make([]byte, 16)
+		if _, err := io.ReadFull(c.Conn, serverRandom); err != nil {
+			return 0, err
+		}
+		c.PeerAEAD = NewAEAD(serverRandom, c.UnitedKey, c.UseAES)
+		if xorConn, ok := c.Conn.(*XorConn); ok {
+			xorConn.PeerCTR = NewCTR(c.UnitedKey, serverRandom)
+		}
+	}
+	if c.PeerPadding != nil { // client's 1-RTT
+		if _, err := io.ReadFull(c.Conn, c.PeerPadding); err != nil {
+			return 0, err
+		}
+		if _, err := c.PeerAEAD.Open(c.PeerPadding[:0], nil, c.PeerPadding, nil); err != nil {
+			return 0, err
+		}
+		c.PeerPadding = nil
+	}
+	if c.input.Len() > 0 {
+		return c.input.Read(b)
+	}
+	peerHeader := [5]byte{}
+	if _, err := io.ReadFull(c.Conn, peerHeader[:]); err != nil {
+		return 0, err
+	}
+	l, err := DecodeHeader(peerHeader[:]) // l: 17~17000
+	if err != nil {
+		if c.Client != nil && errors.Is(err, ErrInvalidHeader) { // client's 0-RTT
+			c.Client.RWLock.Lock()
+			if bytes.HasPrefix(c.UnitedKey, c.Client.PfsKey) {
+				c.Client.Expire = time.Now() // expired
+			}
+			c.Client.RWLock.Unlock()
+			return 0, E.New("new handshake needed")
+		}
+		return 0, err
+	}
+	c.Client = nil
+	if c.rawInput.Cap() < l {
+		c.rawInput.Grow(l) // no need to use sync.Pool, because we are always reading
+	}
+	peerData := c.rawInput.Bytes()[:l]
+	if _, err := io.ReadFull(c.Conn, peerData); err != nil {
+		return 0, err
+	}
+	dst := peerData[:l-16]
+	if len(dst) <= len(b) {
+		dst = b[:len(dst)] // avoids another copy()
+	}
+	var newAEAD *AEAD
+	if bytes.Equal(c.PeerAEAD.Nonce[:], MaxNonce) {
+		newAEAD = NewAEAD(append(peerHeader[:], peerData...), c.UnitedKey, c.UseAES)
+	}
+	_, err = c.PeerAEAD.Open(dst[:0], nil, peerData, peerHeader[:])
+	if newAEAD != nil {
+		c.PeerAEAD = newAEAD
+	}
+	if err != nil {
+		return 0, err
+	}
+	if len(dst) > len(b) {
+		c.input.Reset(dst[copy(b, dst):])
+		dst = b // for len(dst)
+	}
+	return len(dst), nil
+}
+
+// Upstream returns the underlying connection, allowing Vision to unwrap and access the TLS connection
+func (c *CommonConn) Upstream() any {
+	return c.Conn
+}
+
+func (c *CommonConn) IsEncryptionLayer() bool {
+	return true
+}
+
+type AEAD struct {
+	cipher.AEAD
+	Nonce [12]byte
+}
+
+func NewAEAD(ctx, key []byte, useAES bool) *AEAD {
+	k := make([]byte, 32)
+	blake3.DeriveKey(k, string(ctx), key)
+	var aead cipher.AEAD
+	if useAES {
+		block, _ := aes.NewCipher(k)
+		aead, _ = cipher.NewGCM(block)
+	} else {
+		aead, _ = chacha20poly1305.New(k)
+	}
+	return &AEAD{AEAD: aead}
+}
+
+func (a *AEAD) Seal(dst, nonce, plaintext, additionalData []byte) []byte {
+	if nonce == nil {
+		nonce = IncreaseNonce(a.Nonce[:])
+	}
+	return a.AEAD.Seal(dst, nonce, plaintext, additionalData)
+}
+
+func (a *AEAD) Open(dst, nonce, ciphertext, additionalData []byte) ([]byte, error) {
+	if nonce == nil {
+		nonce = IncreaseNonce(a.Nonce[:])
+	}
+	return a.AEAD.Open(dst, nonce, ciphertext, additionalData)
+}
+
+func IncreaseNonce(nonce []byte) []byte {
+	for i := range 12 {
+		nonce[11-i]++
+		if nonce[11-i] != 0 {
+			break
+		}
+	}
+	return nonce
+}
+
+var MaxNonce = bytes.Repeat([]byte{255}, 12)
+
+func EncodeLength(l int) []byte {
+	return []byte{byte(l >> 8), byte(l)}
+}
+
+func DecodeLength(b []byte) int {
+	return int(b[0])<<8 | int(b[1])
+}
+
+func EncodeHeader(h []byte, l int) {
+	h[0] = 23
+	h[1] = 3
+	h[2] = 3
+	h[3] = byte(l >> 8)
+	h[4] = byte(l)
+}
+
+var ErrInvalidHeader = errors.New("invalid header")
+
+func DecodeHeader(h []byte) (l int, err error) {
+	l = int(h[3])<<8 | int(h[4])
+	if h[0] != 23 || h[1] != 3 || h[2] != 3 {
+		l = 0
+	}
+	if l < 17 || l > 17000 { // TODO: TLSv1.3 max length
+		err = fmt.Errorf("%w: %v", ErrInvalidHeader, h[:5]) // DO NOT CHANGE: relied by client's Read()
+	}
+	return
+}
+
+func ParsePadding(padding string, paddingLens, paddingGaps *[][3]int) (err error) {
+	if padding == "" {
+		return
+	}
+	maxLen := 0
+	for i, s := range strings.Split(padding, ".") {
+		x := strings.Split(s, "-")
+		if len(x) < 3 || x[0] == "" || x[1] == "" || x[2] == "" {
+			return E.New("invalid padding lenth/gap parameter: " + s)
+		}
+		y := [3]int{}
+		if y[0], err = strconv.Atoi(x[0]); err != nil {
+			return
+		}
+		if y[1], err = strconv.Atoi(x[1]); err != nil {
+			return
+		}
+		if y[2], err = strconv.Atoi(x[2]); err != nil {
+			return
+		}
+		if i == 0 && (y[0] < 100 || y[1] < 18+17 || y[2] < 18+17) {
+			return E.New("first padding length must not be smaller than 35")
+		}
+		if i%2 == 0 {
+			*paddingLens = append(*paddingLens, y)
+			maxLen += max(y[1], y[2])
+		} else {
+			*paddingGaps = append(*paddingGaps, y)
+		}
+	}
+	if maxLen > 18+65535 {
+		return E.New("total padding length must not be larger than 65553")
+	}
+	return
+}
+
+func CreatePadding(paddingLens, paddingGaps [][3]int) (length int, lens []int, gaps []time.Duration) {
+	if len(paddingLens) == 0 {
+		paddingLens = [][3]int{{100, 111, 1111}, {50, 0, 3333}}
+		paddingGaps = [][3]int{{75, 0, 111}}
+	}
+	for _, y := range paddingLens {
+		l := 0
+		if y[0] >= int(crypto.RandBetween(0, 100)) {
+			l = int(crypto.RandBetween(int64(y[1]), int64(y[2])))
+		}
+		lens = append(lens, l)
+		length += l
+	}
+	for _, y := range paddingGaps {
+		g := 0
+		if y[0] >= int(crypto.RandBetween(0, 100)) {
+			g = int(crypto.RandBetween(int64(y[1]), int64(y[2])))
+		}
+		gaps = append(gaps, time.Duration(g)*time.Millisecond)
+	}
+	return
+}