documentation: Update changelog

Signed-off-by: wwqgtxx <wwqgtxx@gmail.com>

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -12,7 +12,7 @@ body:
           required: true
         - label: Yes, I've searched similar issues on GitHub and didn't find any.
           required: true
-        - label: Yes, I've included all information below (version, config, log, etc).
+        - label: Yes, I've included all information below (version, **FULL** config, **FULL** log, etc).
           required: true
 
   - type: textarea

.github/renovate.json

@@ -0,0 +1,28 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "commitMessagePrefix": "[dependencies]",
+  "extends": [
+    "config:base",
+    ":disableRateLimiting"
+  ],
+  "baseBranches": [
+    "dev-next"
+  ],
+  "golang": {
+    "enabled": false
+  },
+  "packageRules": [
+    {
+      "matchManagers": [
+        "github-actions"
+      ],
+      "groupName": "github-actions"
+    },
+    {
+      "matchManagers": [
+        "dockerfile"
+      ],
+      "groupName": "Dockerfile"
+    }
+  ]
+}

.github/workflows/debug.yml

@@ -3,8 +3,7 @@ name: Debug build
 on:
   push:
     branches:
-      - main
-      - dev
+      - main-next
       - dev-next
     paths-ignore:
       - '**.md'
@@ -12,8 +11,7 @@ on:
       - '!.github/workflows/debug.yml'
   pull_request:
     branches:
-      - main
-      - dev
+      - main-next
       - dev-next
 
 jobs:
@@ -21,28 +19,18 @@ jobs:
     name: Debug build
     runs-on: ubuntu-latest
     steps:
-      - name: Cancel previous
-        uses: styfle/cancel-workflow-action@0.7.0
-        with:
-          access_token: ${{ github.token }}
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
       - name: Get latest go version
         id: version
         run: |
-          echo ::set-output name=go_version::$(curl -s https://raw.githubusercontent.com/actions/go-versions/main/versions-manifest.json | grep -oE '"version": "[0-9]{1}.[0-9]{1,}(.[0-9]{1,})?"' | head -1 | cut -d':' -f2 | sed 's/ //g; s/"//g')
+          echo go_version=$(curl -s https://raw.githubusercontent.com/actions/go-versions/main/versions-manifest.json | grep -oE '"version": "[0-9]{1}.[0-9]{1,}(.[0-9]{1,})?"' | head -1 | cut -d':' -f2 | sed 's/ //g; s/"//g') >> $GITHUB_OUTPUT
       - name: Setup Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v4
         with:
           go-version: ${{ steps.version.outputs.go_version }}
-      - name: Cache go module
-        uses: actions/cache@v2
-        with:
-          path: |
-            ~/go/pkg/mod
-          key: go-${{ hashFiles('**/go.sum') }}
       - name: Add cache to Go proxy
         run: |
           version=`git rev-parse HEAD`
@@ -55,6 +43,26 @@ jobs:
       - name: Run Test
         run: |
           go test -v ./...
+  build_go118:
+    name: Debug build (Go 1.18)
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: Setup Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: 1.18.10
+      - name: Cache go module
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/go/pkg/mod
+          key: go118-${{ hashFiles('**/go.sum') }}
+      - name: Run Test
+        run: make
   cross:
     strategy:
       matrix:
@@ -128,6 +136,9 @@ jobs:
           - name: linux-mips64el
             goos: linux
             goarch: mips64le
+          - name: linux-s390x
+            goos: linux
+            goarch: s390x
           # darwin
           - name: darwin-amd64
             goos: darwin
@@ -168,28 +179,22 @@ jobs:
       TAGS: with_clash_api,with_quic
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
       - name: Get latest go version
         id: version
         run: |
-          echo ::set-output name=go_version::$(curl -s https://raw.githubusercontent.com/actions/go-versions/main/versions-manifest.json | grep -oE '"version": "[0-9]{1}.[0-9]{1,}(.[0-9]{1,})?"' | head -1 | cut -d':' -f2 | sed 's/ //g; s/"//g')
+          echo go_version=$(curl -s https://raw.githubusercontent.com/actions/go-versions/main/versions-manifest.json | grep -oE '"version": "[0-9]{1}.[0-9]{1,}(.[0-9]{1,})?"' | head -1 | cut -d':' -f2 | sed 's/ //g; s/"//g') >> $GITHUB_OUTPUT
       - name: Setup Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v4
         with:
           go-version: ${{ steps.version.outputs.go_version }}
-      - name: Cache go module
-        uses: actions/cache@v2
-        with:
-          path: |
-            ~/go/pkg/mod
-          key: go-${{ hashFiles('**/go.sum') }}
       - name: Build
         id: build
         run: make
       - name: Upload artifact
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v3
         with:
           name: sing-box-${{ matrix.name }}
-          path: sing-box*
+          path: sing-box*

.github/workflows/docker.yml

@@ -1,8 +1,5 @@
 name: Build Docker Images
 on:
-  push:
-    tags:
-      - v*
   workflow_dispatch:
     inputs:
       tag:
@@ -12,32 +9,37 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Setup Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v2
+      - name: Setup QEMU for Docker Buildx
+        uses: docker/setup-qemu-action@v2
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v1
+        uses: docker/login-action@v2
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Docker metadata
         id: metadata
-        uses: docker/metadata-action@v3
+        uses: docker/metadata-action@v4
         with:
           images: ghcr.io/sagernet/sing-box
       - name: Get tag to build
         id: tag
         run: |
+          echo "latest=ghcr.io/sagernet/sing-box:latest" >> $GITHUB_OUTPUT
           if [[ -z "${{ github.event.inputs.tag }}" ]]; then
-            echo ::set-output name=tag::ghcr.io/sagernet/sing-box:${{ github.ref_name }}
+            echo "versioned=ghcr.io/sagernet/sing-box:${{ github.ref_name }}" >> $GITHUB_OUTPUT
           else
-            echo ::set-output name=tag::ghcr.io/sagernet/sing-box:${{ github.event.inputs.tag }}
+            echo "versioned=ghcr.io/sagernet/sing-box:${{ github.event.inputs.tag }}" >> $GITHUB_OUTPUT
           fi
       - name: Build and release Docker images
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v4
         with:
-          platforms: linux/386,linux/amd64
+          platforms: linux/386,linux/amd64,linux/arm64,linux/s390x
           target: dist
-          tags: ${{ steps.tag.outputs.tag }}
-          push: true
+          tags: |
+            ${{ steps.tag.outputs.latest }}
+            ${{ steps.tag.outputs.versioned }}
+          push: true

.github/workflows/lint.yml

@@ -3,45 +3,34 @@ name: Lint
 on:
   push:
     branches:
-      - dev
+      - main-next
+      - dev-next
     paths-ignore:
       - '**.md'
       - '.github/**'
-      - '!.github/workflows/debug.yml'
+      - '!.github/workflows/lint.yml'
   pull_request:
     branches:
-      - dev
+      - main-next
+      - dev-next
 
 jobs:
   build:
     name: Build
     runs-on: ubuntu-latest
     steps:
-      - name: Cancel previous
-        uses: styfle/cancel-workflow-action@0.7.0
-        with:
-          access_token: ${{ github.token }}
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
       - name: Get latest go version
         id: version
         run: |
-          echo ::set-output name=go_version::$(curl -s https://raw.githubusercontent.com/actions/go-versions/main/versions-manifest.json | grep -oE '"version": "[0-9]{1}.[0-9]{1,}(.[0-9]{1,})?"' | head -1 | cut -d':' -f2 | sed 's/ //g; s/"//g')
+          echo go_version=$(curl -s https://raw.githubusercontent.com/actions/go-versions/main/versions-manifest.json | grep -oE '"version": "[0-9]{1}.[0-9]{1,}(.[0-9]{1,})?"' | head -1 | cut -d':' -f2 | sed 's/ //g; s/"//g') >> $GITHUB_OUTPUT
       - name: Setup Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v4
         with:
           go-version: ${{ steps.version.outputs.go_version }}
-      - name: Cache go module
-        uses: actions/cache@v2
-        with:
-          path: |
-            ~/go/pkg/mod
-          key: go-${{ hashFiles('**/go.sum') }}
-      - name: Get dependencies
-        run: |
-          go mod download -x
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3
         with:

.github/workflows/mkdocs.yml

@@ -10,9 +10,11 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
         with:
           python-version: 3.x
-      - run: pip install mkdocs-material mkdocs-static-i18n
-      - run: mkdocs gh-deploy -m "{sha}" --force --ignore-version --no-history
+      - run: |
+          pip install mkdocs-material=="9.*" mkdocs-static-i18n=="0.53"
+      - run: |
+          mkdocs gh-deploy -m "{sha}" --force --ignore-version --no-history

.github/workflows/stale.yml

@@ -8,7 +8,7 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v5
+      - uses: actions/stale@v7
         with:
           stale-issue-message: 'This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 5 days'
           days-before-stale: 60

.gitignore

@@ -4,4 +4,12 @@
 /*.db
 /site/
 /bin/
-/dist/
+/dist/
+/sing-box
+/sing-box.exe
+/build/
+/*.jar
+/*.aar
+/*.xcframework/
+.DS_Store
+/config.d/

.golangci.yml

@@ -3,19 +3,24 @@ linters:
   enable:
     - gofumpt
     - govet
-#    - gci
+    - gci
     - staticcheck
     - paralleltest
 
 run:
   skip-dirs:
+    - transport/simple-obfs
+    - transport/clashssr
     - transport/cloudflaretls
+    - transport/shadowtls/tls
+    - transport/shadowtls/tls_go119
 
 linters-settings:
-#  gci:
-#    sections:
-#      - standard
-#      - prefix(github.com/sagernet/)
-#      - default
+  gci:
+    custom-order: true
+    sections:
+      - standard
+      - prefix(github.com/sagernet/)
+      - default
   staticcheck:
-    go: '1.19'
+    go: '1.20'

.goreleaser.yaml

@@ -1,6 +1,7 @@
 project_name: sing-box
 builds:
-  - main: ./cmd/sing-box
+  - id: main
+    main: ./cmd/sing-box
     flags:
       - -v
       - -trimpath
@@ -9,21 +10,22 @@ builds:
     gcflags:
       - all=-trimpath={{.Env.GOPATH}}
     ldflags:
-      - -X github.com/sagernet/sing-box/constant.Commit={{ .ShortCommit }} -s -w -buildid=
+      - -X github.com/sagernet/sing-box/constant.Version={{ .Version }} -s -w -buildid=
     tags:
+      - with_gvisor
       - with_quic
       - with_wireguard
+      - with_utls
+      - with_reality_server
       - with_clash_api
     env:
       - CGO_ENABLED=0
     targets:
-      - android_arm64
-      - android_amd64
-      - android_amd64_v3
       - linux_amd64_v1
       - linux_amd64_v3
       - linux_arm64
       - linux_arm_7
+      - linux_s390x
       - windows_amd64_v1
       - windows_amd64_v3
       - windows_386
@@ -32,6 +34,54 @@ builds:
       - darwin_amd64_v3
       - darwin_arm64
     mod_timestamp: '{{ .CommitTimestamp }}'
+  - id: android
+    main: ./cmd/sing-box
+    flags:
+      - -v
+      - -trimpath
+    asmflags:
+      - all=-trimpath={{.Env.GOPATH}}
+    gcflags:
+      - all=-trimpath={{.Env.GOPATH}}
+    ldflags:
+      - -X github.com/sagernet/sing-box/constant.Version={{ .Version }} -s -w -buildid=
+    tags:
+      - with_gvisor
+      - with_quic
+      - with_wireguard
+      - with_utls
+      - with_clash_api
+    env:
+      - CGO_ENABLED=1
+    overrides:
+      - goos: android
+        goarch: arm
+        goarm: 7
+        env:
+          - CC=armv7a-linux-androideabi19-clang
+          - CXX=armv7a-linux-androideabi19-clang++
+      - goos: android
+        goarch: arm64
+        env:
+          - CC=aarch64-linux-android21-clang
+          - CXX=aarch64-linux-android21-clang++
+      - goos: android
+        goarch: 386
+        env:
+          - CC=i686-linux-android19-clang
+          - CXX=i686-linux-android19-clang++
+      - goos: android
+        goarch: amd64
+        goamd64: v1
+        env:
+          - CC=x86_64-linux-android21-clang
+          - CXX=x86_64-linux-android21-clang++
+    targets:
+      - android_arm_7
+      - android_arm64
+      - android_386
+      - android_amd64
+    mod_timestamp: '{{ .CommitTimestamp }}'
 snapshot:
   name_template: "{{ .Version }}.{{ .ShortCommit }}"
 archives:

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.19-alpine AS builder
+FROM golang:1.20-alpine AS builder
 LABEL maintainer="nekohasekai <contact-git@sekai.icu>"
 COPY . /go/src/github.com/sagernet/sing-box
 WORKDIR /go/src/github.com/sagernet/sing-box
@@ -8,13 +8,13 @@ ENV CGO_ENABLED=0
 RUN set -ex \
     && apk add git build-base \
     && export COMMIT=$(git rev-parse --short HEAD) \
-    && go build -v -trimpath -tags 'no_gvisor,with_quic,with_wireguard,with_acme' \
+    && export VERSION=$(go run ./cmd/internal/read_tag) \
+    && go build -v -trimpath -tags with_gvisor,with_quic,with_wireguard,with_utls,with_reality_server,with_clash_api,with_acme \
         -o /go/bin/sing-box \
-        -ldflags "-X github.com/sagernet/sing-box/constant.Commit=${COMMIT} -w -s -buildid=" \
+        -ldflags "-X \"github.com/sagernet/sing-box/constant.Version=$VERSION\" -s -w -buildid=" \
         ./cmd/sing-box
 FROM alpine AS dist
 LABEL maintainer="nekohasekai <contact-git@sekai.icu>"
-RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
 RUN set -ex \
     && apk upgrade \
     && apk add bash tzdata ca-certificates \

LICENSE

@@ -11,4 +11,7 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
-along with this program. If not, see <http://www.gnu.org/licenses/>.
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+In addition, no derivative work may use the name or imply association
+with this application without prior consent.

Makefile

@@ -1,10 +1,15 @@
 NAME = sing-box
 COMMIT = $(shell git rev-parse --short HEAD)
-TAGS ?= with_quic,with_wireguard,with_clash_api
-PARAMS = -v -trimpath -tags '$(TAGS)' -ldflags \
-		'-X "github.com/sagernet/sing-box/constant.Commit=$(COMMIT)" \
-		-w -s -buildid='
+TAGS ?= with_gvisor,with_quic,with_wireguard,with_utls,with_reality_server,with_clash_api
+TAGS_TEST ?= with_gvisor,with_quic,with_wireguard,with_grpc,with_ech,with_utls,with_reality_server,with_shadowsocksr
+
+GOHOSTOS = $(shell go env GOHOSTOS)
+GOHOSTARCH = $(shell go env GOHOSTARCH)
+VERSION=$(shell CGO_ENABLED=0 GOOS=$(GOHOSTOS) GOARCH=$(GOHOSTARCH) go run ./cmd/internal/read_tag)
+
+PARAMS = -v -trimpath -tags "$(TAGS)" -ldflags "-X 'github.com/sagernet/sing-box/constant.Version=$(VERSION)' -s -w -buildid="
 MAIN = ./cmd/sing-box
+PREFIX ?= $(shell go env GOPATH)
 
 .PHONY: test release
 
@@ -12,16 +17,16 @@ build:
 	go build $(PARAMS) $(MAIN)
 
 install:
-	go install $(PARAMS) $(MAIN)
+	go build -o $(PREFIX)/bin/$(NAME) $(PARAMS) $(MAIN)
 
 fmt:
 	@gofumpt -l -w .
 	@gofmt -s -w .
-	@gci write -s "standard,prefix(github.com/sagernet/),default" .
+	@gci write --custom-order -s "standard,prefix(github.com/sagernet/),default" .
 
 fmt_install:
 	go install -v mvdan.cc/gofumpt@latest
-	go install -v github.com/daixiang0/gci@v0.4.0
+	go install -v github.com/daixiang0/gci@latest
 
 lint:
 	GOOS=linux golangci-lint run ./...
@@ -43,14 +48,14 @@ proto_install:
 	go install -v google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest
 
 snapshot:
-	goreleaser release --rm-dist --snapshot
+	go run ./cmd/internal/build goreleaser release --rm-dist --snapshot || exit 1
 	mkdir dist/release
 	mv dist/*.tar.gz dist/*.zip dist/*.deb dist/*.rpm dist/release
 	ghr --delete --draft --prerelease -p 1 nightly dist/release
 	rm -r dist
 
 release:
-	goreleaser release --rm-dist --skip-publish
+	go run ./cmd/internal/build goreleaser release --rm-dist --skip-publish || exit 1
 	mkdir dist/release
 	mv dist/*.tar.gz dist/*.zip dist/*.deb dist/*.rpm dist/release
 	ghr --delete --draft --prerelease -p 3 $(shell git describe --tags) dist/release
@@ -61,14 +66,34 @@ release_install:
 	go install -v github.com/tcnksm/ghr@latest
 
 test:
-	@go test -v . && \
-	pushd test && \
+	@go test -v ./... && \
+	cd test && \
 	go mod tidy && \
-	go test -v -tags with_quic,with_wireguard,with_grpc,with_ech,with_utls,with_shadowsocksr . && \
-	popd
+	go test -v -tags "$(TAGS_TEST)" .
+
+test_stdio:
+	@go test -v ./... && \
+	cd test && \
+	go mod tidy && \
+	go test -v -tags "$(TAGS_TEST),force_stdio" .
+
+android:
+	go run ./cmd/internal/build_libbox -target android
+
+ios:
+	go run ./cmd/internal/build_libbox -target ios
+
+lib:
+	go run ./cmd/internal/build_libbox -target android
+	go run ./cmd/internal/build_libbox -target ios
+
+lib_install:
+	go get -v -d
+	go install -v github.com/sagernet/gomobile/cmd/gomobile@v0.0.0-20230413023804-244d7ff07035
+	go install -v github.com/sagernet/gomobile/cmd/gobind@v0.0.0-20230413023804-244d7ff07035
 
 clean:
-	rm -rf bin dist
+	rm -rf bin dist sing-box
 	rm -f $(shell go env GOPATH)/sing-box
 
 update:

README.md

@@ -2,10 +2,16 @@
 
 The universal proxy platform.
 
+[![Packaging status](https://repology.org/badge/vertical-allrepos/sing-box.svg)](https://repology.org/project/sing-box/versions)
+
 ## Documentation
 
 https://sing-box.sagernet.org
 
+## Support
+
+https://community.sagernet.org/c/sing-box/
+
 ## License
 
 ```
@@ -23,4 +29,7 @@ GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+In addition, no derivative work may use the name or imply association
+with this application without prior consent.
 ```

adapter/experimental.go

@@ -4,14 +4,18 @@ import (
 	"context"
 	"net"
 
+	"github.com/sagernet/sing-box/common/urltest"
 	N "github.com/sagernet/sing/common/network"
 )
 
 type ClashServer interface {
 	Service
+	PreStarter
 	Mode() string
 	StoreSelected() bool
+	StoreFakeIP() bool
 	CacheFile() ClashCacheFile
+	HistoryStorage() *urltest.HistoryStorage
 	RoutedConnection(ctx context.Context, conn net.Conn, metadata InboundContext, matchedRule Rule) (net.Conn, Tracker)
 	RoutedPacketConnection(ctx context.Context, conn N.PacketConn, metadata InboundContext, matchedRule Rule) (N.PacketConn, Tracker)
 }
@@ -19,6 +23,7 @@ type ClashServer interface {
 type ClashCacheFile interface {
 	LoadSelected(group string) string
 	StoreSelected(group string, selected string) error
+	FakeIPStorage
 }
 
 type Tracker interface {
@@ -30,9 +35,24 @@ type OutboundGroup interface {
 	All() []string
 }
 
+type URLTestGroup interface {
+	OutboundGroup
+	URLTest(ctx context.Context, url string) (map[string]uint16, error)
+}
+
 func OutboundTag(detour Outbound) string {
 	if group, isGroup := detour.(OutboundGroup); isGroup {
 		return group.Now()
 	}
 	return detour.Tag()
 }
+
+type V2RayServer interface {
+	Service
+	StatsService() V2RayStatsService
+}
+
+type V2RayStatsService interface {
+	RoutedConnection(inbound string, outbound string, user string, conn net.Conn) net.Conn
+	RoutedPacketConnection(inbound string, outbound string, user string, conn N.PacketConn) N.PacketConn
+}

adapter/fakeip.go

@@ -0,0 +1,23 @@
+package adapter
+
+import (
+	"net/netip"
+
+	"github.com/sagernet/sing-dns"
+)
+
+type FakeIPStore interface {
+	Service
+	Contains(address netip.Addr) bool
+	Create(domain string, strategy dns.DomainStrategy) (netip.Addr, error)
+	Lookup(address netip.Addr) (string, bool)
+	Reset() error
+}
+
+type FakeIPStorage interface {
+	FakeIPMetadata() *FakeIPMetadata
+	FakeIPSaveMetadata(metadata *FakeIPMetadata) error
+	FakeIPStore(address netip.Addr, domain string) error
+	FakeIPLoad(address netip.Addr) (string, bool)
+	FakeIPReset() error
+}

adapter/fakeip_metadata.go

@@ -0,0 +1,50 @@
+package adapter
+
+import (
+	"bytes"
+	"encoding"
+	"encoding/binary"
+	"io"
+	"net/netip"
+
+	"github.com/sagernet/sing/common"
+)
+
+type FakeIPMetadata struct {
+	Inet4Range   netip.Prefix
+	Inet6Range   netip.Prefix
+	Inet4Current netip.Addr
+	Inet6Current netip.Addr
+}
+
+func (m *FakeIPMetadata) MarshalBinary() (data []byte, err error) {
+	var buffer bytes.Buffer
+	for _, marshaler := range []encoding.BinaryMarshaler{m.Inet4Range, m.Inet6Range, m.Inet4Current, m.Inet6Current} {
+		data, err = marshaler.MarshalBinary()
+		if err != nil {
+			return
+		}
+		common.Must(binary.Write(&buffer, binary.BigEndian, uint16(len(data))))
+		buffer.Write(data)
+	}
+	data = buffer.Bytes()
+	return
+}
+
+func (m *FakeIPMetadata) UnmarshalBinary(data []byte) error {
+	reader := bytes.NewReader(data)
+	for _, unmarshaler := range []encoding.BinaryUnmarshaler{&m.Inet4Range, &m.Inet6Range, &m.Inet4Current, &m.Inet6Current} {
+		var length uint16
+		common.Must(binary.Read(reader, binary.BigEndian, &length))
+		element := make([]byte, length)
+		_, err := io.ReadFull(reader, element)
+		if err != nil {
+			return err
+		}
+		err = unmarshaler.UnmarshalBinary(element)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}

adapter/inbound.go

@@ -6,7 +6,7 @@ import (
 	"net/netip"
 
 	"github.com/sagernet/sing-box/common/process"
-	"github.com/sagernet/sing-dns"
+	"github.com/sagernet/sing-box/option"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
 )
@@ -27,7 +27,7 @@ type InjectableInbound interface {
 type InboundContext struct {
 	Inbound     string
 	InboundType string
-	IPVersion   int
+	IPVersion   uint8
 	Network     string
 	Source      M.Socksaddr
 	Destination M.Socksaddr
@@ -38,16 +38,18 @@ type InboundContext struct {
 
 	// cache
 
-	InboundDetour            string
-	LastInbound              string
-	OriginDestination        M.Socksaddr
-	DomainStrategy           dns.DomainStrategy
-	SniffEnabled             bool
-	SniffOverrideDestination bool
-	DestinationAddresses     []netip.Addr
-	SourceGeoIPCode          string
-	GeoIPCode                string
-	ProcessInfo              *process.Info
+	InboundDetour        string
+	LastInbound          string
+	OriginDestination    M.Socksaddr
+	InboundOptions       option.InboundOptions
+	DestinationAddresses []netip.Addr
+	SourceGeoIPCode      string
+	GeoIPCode            string
+	ProcessInfo          *process.Info
+
+	// dns cache
+
+	QueryType uint16
 }
 
 type inboundContextKey struct{}

adapter/outbound.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"net"
 
+	"github.com/sagernet/sing-tun"
 	N "github.com/sagernet/sing/common/network"
 )
 
@@ -17,3 +18,8 @@ type Outbound interface {
 	NewConnection(ctx context.Context, conn net.Conn, metadata InboundContext) error
 	NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata InboundContext) error
 }
+
+type IPOutbound interface {
+	Outbound
+	NewIPConnection(ctx context.Context, conn tun.RouteContext, metadata InboundContext) (tun.DirectDestination, error)
+}

adapter/prestart.go

@@ -0,0 +1,15 @@
+package adapter
+
+type PreStarter interface {
+	PreStart() error
+}
+
+func PreStart(starter any) error {
+	if preService, ok := starter.(PreStarter); ok {
+		err := preService.PreStart()
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}

adapter/router.go

@@ -11,7 +11,7 @@ import (
 	"github.com/sagernet/sing/common/control"
 	N "github.com/sagernet/sing/common/network"
 
-	"golang.org/x/net/dns/dnsmessage"
+	mdns "github.com/miekg/dns"
 )
 
 type Router interface {
@@ -21,27 +21,54 @@ type Router interface {
 	Outbound(tag string) (Outbound, bool)
 	DefaultOutbound(network string) Outbound
 
+	FakeIPStore() FakeIPStore
+
 	RouteConnection(ctx context.Context, conn net.Conn, metadata InboundContext) error
 	RoutePacketConnection(ctx context.Context, conn N.PacketConn, metadata InboundContext) error
+	RouteIPConnection(ctx context.Context, conn tun.RouteContext, metadata InboundContext) tun.RouteAction
+
+	NatRequired(outbound string) bool
 
 	GeoIPReader() *geoip.Reader
 	LoadGeosite(code string) (Rule, error)
 
-	Exchange(ctx context.Context, message *dnsmessage.Message) (*dnsmessage.Message, error)
+	Exchange(ctx context.Context, message *mdns.Msg) (*mdns.Msg, error)
 	Lookup(ctx context.Context, domain string, strategy dns.DomainStrategy) ([]netip.Addr, error)
 	LookupDefault(ctx context.Context, domain string) ([]netip.Addr, error)
 
-	InterfaceBindManager() control.BindManager
+	InterfaceFinder() control.InterfaceFinder
 	DefaultInterface() string
 	AutoDetectInterface() bool
+	AutoDetectInterfaceFunc() control.Func
 	DefaultMark() int
 	NetworkMonitor() tun.NetworkUpdateMonitor
 	InterfaceMonitor() tun.DefaultInterfaceMonitor
 	PackageManager() tun.PackageManager
+
 	Rules() []Rule
+	IPRules() []IPRule
+
+	TimeService
 
 	ClashServer() ClashServer
-	SetClashServer(controller ClashServer)
+	SetClashServer(server ClashServer)
+
+	V2RayServer() V2RayServer
+	SetV2RayServer(server V2RayServer)
+}
+
+type routerContextKey struct{}
+
+func ContextWithRouter(ctx context.Context, router Router) context.Context {
+	return context.WithValue(ctx, (*routerContextKey)(nil), router)
+}
+
+func RouterFromContext(ctx context.Context) Router {
+	metadata := ctx.Value((*routerContextKey)(nil))
+	if metadata == nil {
+		return nil
+	}
+	return metadata.(Router)
 }
 
 type Rule interface {
@@ -56,4 +83,14 @@ type Rule interface {
 type DNSRule interface {
 	Rule
 	DisableCache() bool
+	RewriteTTL() *uint32
+}
+
+type IPRule interface {
+	Rule
+	Action() tun.ActionType
+}
+
+type InterfaceUpdateListener interface {
+	InterfaceUpdated() error
 }

adapter/time.go

@@ -0,0 +1,8 @@
+package adapter
+
+import "time"
+
+type TimeService interface {
+	Service
+	TimeFunc() func() time.Time
+}

adapter/upstream.go

@@ -38,13 +38,25 @@ type myUpstreamHandlerWrapper struct {
 }
 
 func (w *myUpstreamHandlerWrapper) NewConnection(ctx context.Context, conn net.Conn, metadata M.Metadata) error {
-	w.metadata.Destination = metadata.Destination
-	return w.connectionHandler(ctx, conn, w.metadata)
+	myMetadata := w.metadata
+	if metadata.Source.IsValid() {
+		myMetadata.Source = metadata.Source
+	}
+	if metadata.Destination.IsValid() {
+		myMetadata.Destination = metadata.Destination
+	}
+	return w.connectionHandler(ctx, conn, myMetadata)
 }
 
 func (w *myUpstreamHandlerWrapper) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata M.Metadata) error {
-	w.metadata.Destination = metadata.Destination
-	return w.packetHandler(ctx, conn, w.metadata)
+	myMetadata := w.metadata
+	if metadata.Source.IsValid() {
+		myMetadata.Source = metadata.Source
+	}
+	if metadata.Destination.IsValid() {
+		myMetadata.Destination = metadata.Destination
+	}
+	return w.packetHandler(ctx, conn, myMetadata)
 }
 
 func (w *myUpstreamHandlerWrapper) NewError(ctx context.Context, err error) {
@@ -78,13 +90,23 @@ func NewUpstreamContextHandler(
 
 func (w *myUpstreamContextHandlerWrapper) NewConnection(ctx context.Context, conn net.Conn, metadata M.Metadata) error {
 	myMetadata := ContextFrom(ctx)
-	myMetadata.Destination = metadata.Destination
+	if metadata.Source.IsValid() {
+		myMetadata.Source = metadata.Source
+	}
+	if metadata.Destination.IsValid() {
+		myMetadata.Destination = metadata.Destination
+	}
 	return w.connectionHandler(ctx, conn, *myMetadata)
 }
 
 func (w *myUpstreamContextHandlerWrapper) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata M.Metadata) error {
 	myMetadata := ContextFrom(ctx)
-	myMetadata.Destination = metadata.Destination
+	if metadata.Source.IsValid() {
+		myMetadata.Source = metadata.Source
+	}
+	if metadata.Destination.IsValid() {
+		myMetadata.Destination = metadata.Destination
+	}
 	return w.packetHandler(ctx, conn, *myMetadata)
 }
 

adapter/v2ray.go

@@ -3,6 +3,10 @@ package adapter
 import (
 	"context"
 	"net"
+
+	E "github.com/sagernet/sing/common/exceptions"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
 )
 
 type V2RayServerTransport interface {
@@ -12,6 +16,12 @@ type V2RayServerTransport interface {
 	Close() error
 }
 
+type V2RayServerTransportHandler interface {
+	N.TCPConnectionHandler
+	E.Handler
+	FallbackConnection(ctx context.Context, conn net.Conn, metadata M.Metadata) error
+}
+
 type V2RayClientTransport interface {
 	DialContext(ctx context.Context) (net.Conn, error)
 }

box.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/experimental"
+	"github.com/sagernet/sing-box/experimental/libbox/platform"
 	"github.com/sagernet/sing-box/inbound"
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
@@ -23,78 +24,61 @@ import (
 var _ adapter.Service = (*Box)(nil)
 
 type Box struct {
-	createdAt   time.Time
-	router      adapter.Router
-	inbounds    []adapter.Inbound
-	outbounds   []adapter.Outbound
-	logFactory  log.Factory
-	logger      log.ContextLogger
-	logFile     *os.File
-	clashServer adapter.ClashServer
-	done        chan struct{}
+	createdAt    time.Time
+	router       adapter.Router
+	inbounds     []adapter.Inbound
+	outbounds    []adapter.Outbound
+	logFactory   log.Factory
+	logger       log.ContextLogger
+	preServices  map[string]adapter.Service
+	postServices map[string]adapter.Service
+	done         chan struct{}
 }
 
-func New(ctx context.Context, options option.Options) (*Box, error) {
-	createdAt := time.Now()
-	logOptions := common.PtrValueOrDefault(options.Log)
+type Options struct {
+	option.Options
+	Context           context.Context
+	PlatformInterface platform.Interface
+}
 
+func New(options Options) (*Box, error) {
+	ctx := options.Context
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	createdAt := time.Now()
+	experimentalOptions := common.PtrValueOrDefault(options.Experimental)
+	applyDebugOptions(common.PtrValueOrDefault(experimentalOptions.Debug))
 	var needClashAPI bool
-	if options.Experimental != nil && options.Experimental.ClashAPI != nil && options.Experimental.ClashAPI.ExternalController != "" {
+	var needV2RayAPI bool
+	if experimentalOptions.ClashAPI != nil && experimentalOptions.ClashAPI.ExternalController != "" {
 		needClashAPI = true
 	}
-
-	var logFactory log.Factory
-	var observableLogFactory log.ObservableFactory
-	var logFile *os.File
-	if logOptions.Disabled {
-		observableLogFactory = log.NewNOPFactory()
-		logFactory = observableLogFactory
-	} else {
-		var logWriter io.Writer
-		switch logOptions.Output {
-		case "", "stderr":
-			logWriter = os.Stderr
-		case "stdout":
-			logWriter = os.Stdout
-		default:
-			var err error
-			logFile, err = os.OpenFile(logOptions.Output, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0o644)
-			if err != nil {
-				return nil, err
-			}
-			logWriter = logFile
-		}
-		logFormatter := log.Formatter{
-			BaseTime:         createdAt,
-			DisableColors:    logOptions.DisableColor || logFile != nil,
-			DisableTimestamp: !logOptions.Timestamp && logFile != nil,
-			FullTimestamp:    logOptions.Timestamp,
-			TimestampFormat:  "-0700 2006-01-02 15:04:05",
-		}
-		if needClashAPI {
-			observableLogFactory = log.NewObservableFactory(logFormatter, logWriter)
-			logFactory = observableLogFactory
-		} else {
-			logFactory = log.NewFactory(logFormatter, logWriter)
-		}
-		if logOptions.Level != "" {
-			logLevel, err := log.ParseLevel(logOptions.Level)
-			if err != nil {
-				return nil, E.Cause(err, "parse log level")
-			}
-			logFactory.SetLevel(logLevel)
-		} else {
-			logFactory.SetLevel(log.LevelTrace)
-		}
+	if experimentalOptions.V2RayAPI != nil && experimentalOptions.V2RayAPI.Listen != "" {
+		needV2RayAPI = true
+	}
+	var defaultLogWriter io.Writer
+	if options.PlatformInterface != nil {
+		defaultLogWriter = io.Discard
+	}
+	logFactory, err := log.New(log.Options{
+		Options:        common.PtrValueOrDefault(options.Log),
+		Observable:     needClashAPI,
+		DefaultWriter:  defaultLogWriter,
+		BaseTime:       createdAt,
+		PlatformWriter: options.PlatformInterface,
+	})
+	if err != nil {
+		return nil, E.Cause(err, "create log factory")
 	}
-
 	router, err := route.NewRouter(
 		ctx,
-		logFactory.NewLogger("router"),
-		logFactory.NewLogger("dns"),
+		logFactory,
 		common.PtrValueOrDefault(options.Route),
 		common.PtrValueOrDefault(options.DNS),
+		common.PtrValueOrDefault(options.NTP),
 		options.Inbounds,
+		options.PlatformInterface,
 	)
 	if err != nil {
 		return nil, E.Cause(err, "parse route options")
@@ -114,6 +98,7 @@ func New(ctx context.Context, options option.Options) (*Box, error) {
 			router,
 			logFactory.NewLogger(F.ToString("inbound/", inboundOptions.Type, "[", tag, "]")),
 			inboundOptions,
+			options.PlatformInterface,
 		)
 		if err != nil {
 			return nil, E.Cause(err, "parse inbound[", i, "]")
@@ -132,6 +117,7 @@ func New(ctx context.Context, options option.Options) (*Box, error) {
 			ctx,
 			router,
 			logFactory.NewLogger(F.ToString("outbound/", outboundOptions.Type, "[", tag, "]")),
+			tag,
 			outboundOptions)
 		if err != nil {
 			return nil, E.Cause(err, "parse outbound[", i, "]")
@@ -139,7 +125,7 @@ func New(ctx context.Context, options option.Options) (*Box, error) {
 		outbounds = append(outbounds, out)
 	}
 	err = router.Initialize(inbounds, outbounds, func() adapter.Outbound {
-		out, oErr := outbound.New(ctx, router, logFactory.NewLogger("outbound/direct"), option.Outbound{Type: "direct", Tag: "default"})
+		out, oErr := outbound.New(ctx, router, logFactory.NewLogger("outbound/direct"), "direct", option.Outbound{Type: "direct", Tag: "default"})
 		common.Must(oErr)
 		outbounds = append(outbounds, out)
 		return out
@@ -147,28 +133,56 @@ func New(ctx context.Context, options option.Options) (*Box, error) {
 	if err != nil {
 		return nil, err
 	}
-
-	var clashServer adapter.ClashServer
+	preServices := make(map[string]adapter.Service)
+	postServices := make(map[string]adapter.Service)
 	if needClashAPI {
-		clashServer, err = experimental.NewClashServer(router, observableLogFactory, common.PtrValueOrDefault(options.Experimental.ClashAPI))
+		clashServer, err := experimental.NewClashServer(router, logFactory.(log.ObservableFactory), common.PtrValueOrDefault(options.Experimental.ClashAPI))
 		if err != nil {
 			return nil, E.Cause(err, "create clash api server")
 		}
 		router.SetClashServer(clashServer)
+		preServices["clash api"] = clashServer
+	}
+	if needV2RayAPI {
+		v2rayServer, err := experimental.NewV2RayServer(logFactory.NewLogger("v2ray-api"), common.PtrValueOrDefault(options.Experimental.V2RayAPI))
+		if err != nil {
+			return nil, E.Cause(err, "create v2ray api server")
+		}
+		router.SetV2RayServer(v2rayServer)
+		preServices["v2ray api"] = v2rayServer
 	}
 	return &Box{
-		router:      router,
-		inbounds:    inbounds,
-		outbounds:   outbounds,
-		createdAt:   createdAt,
-		logFactory:  logFactory,
-		logger:      logFactory.NewLogger(""),
-		logFile:     logFile,
-		clashServer: clashServer,
-		done:        make(chan struct{}),
+		router:       router,
+		inbounds:     inbounds,
+		outbounds:    outbounds,
+		createdAt:    createdAt,
+		logFactory:   logFactory,
+		logger:       logFactory.Logger(),
+		preServices:  preServices,
+		postServices: postServices,
+		done:         make(chan struct{}),
 	}, nil
 }
 
+func (s *Box) PreStart() error {
+	err := s.preStart()
+	if err != nil {
+		// TODO: remove catch error
+		defer func() {
+			v := recover()
+			if v != nil {
+				log.Error(E.Cause(err, "origin error"))
+				debug.PrintStack()
+				panic("panic on early close: " + fmt.Sprint(v))
+			}
+		}()
+		s.Close()
+		return err
+	}
+	s.logger.Info("sing-box pre-started (", F.Seconds(time.Since(s.createdAt).Seconds()), "s)")
+	return nil
+}
+
 func (s *Box) Start() error {
 	err := s.start()
 	if err != nil {
@@ -182,48 +196,70 @@ func (s *Box) Start() error {
 			}
 		}()
 		s.Close()
+		return err
 	}
-	return err
+	s.logger.Info("sing-box started (", F.Seconds(time.Since(s.createdAt).Seconds()), "s)")
+	return nil
 }
 
-func (s *Box) start() error {
+func (s *Box) preStart() error {
+	for serviceName, service := range s.preServices {
+		s.logger.Trace("pre-start ", serviceName)
+		err := adapter.PreStart(service)
+		if err != nil {
+			return E.Cause(err, "pre-starting ", serviceName)
+		}
+	}
 	for i, out := range s.outbounds {
+		var tag string
+		if out.Tag() == "" {
+			tag = F.ToString(i)
+		} else {
+			tag = out.Tag()
+		}
 		if starter, isStarter := out.(common.Starter); isStarter {
+			s.logger.Trace("initializing outbound/", out.Type(), "[", tag, "]")
 			err := starter.Start()
 			if err != nil {
-				var tag string
-				if out.Tag() == "" {
-					tag = F.ToString(i)
-				} else {
-					tag = out.Tag()
-				}
 				return E.Cause(err, "initialize outbound/", out.Type(), "[", tag, "]")
 			}
 		}
 	}
-	err := s.router.Start()
+	return s.router.Start()
+}
+
+func (s *Box) start() error {
+	err := s.preStart()
 	if err != nil {
 		return err
 	}
+	for serviceName, service := range s.preServices {
+		s.logger.Trace("starting ", serviceName)
+		err = service.Start()
+		if err != nil {
+			return E.Cause(err, "start ", serviceName)
+		}
+	}
 	for i, in := range s.inbounds {
+		var tag string
+		if in.Tag() == "" {
+			tag = F.ToString(i)
+		} else {
+			tag = in.Tag()
+		}
+		s.logger.Trace("initializing inbound/", in.Type(), "[", tag, "]")
 		err = in.Start()
 		if err != nil {
-			var tag string
-			if in.Tag() == "" {
-				tag = F.ToString(i)
-			} else {
-				tag = in.Tag()
-			}
 			return E.Cause(err, "initialize inbound/", in.Type(), "[", tag, "]")
 		}
 	}
-	if s.clashServer != nil {
-		err = s.clashServer.Start()
+	for serviceName, service := range s.postServices {
+		s.logger.Trace("starting ", service)
+		err = service.Start()
 		if err != nil {
-			return E.Cause(err, "start clash api server")
+			return E.Cause(err, "start ", serviceName)
 		}
 	}
-	s.logger.Info("sing-box started (", F.Seconds(time.Since(s.createdAt).Seconds()), "s)")
 	return nil
 }
 
@@ -234,16 +270,46 @@ func (s *Box) Close() error {
 	default:
 		close(s.done)
 	}
-	for _, in := range s.inbounds {
-		in.Close()
+	var errors error
+	for serviceName, service := range s.postServices {
+		s.logger.Trace("closing ", serviceName)
+		errors = E.Append(errors, service.Close(), func(err error) error {
+			return E.Cause(err, "close ", serviceName)
+		})
 	}
-	for _, out := range s.outbounds {
-		common.Close(out)
+	for i, in := range s.inbounds {
+		s.logger.Trace("closing inbound/", in.Type(), "[", i, "]")
+		errors = E.Append(errors, in.Close(), func(err error) error {
+			return E.Cause(err, "close inbound/", in.Type(), "[", i, "]")
+		})
 	}
-	return common.Close(
-		s.router,
-		s.logFactory,
-		s.clashServer,
-		common.PtrOrNil(s.logFile),
-	)
+	for i, out := range s.outbounds {
+		s.logger.Trace("closing outbound/", out.Type(), "[", i, "]")
+		errors = E.Append(errors, common.Close(out), func(err error) error {
+			return E.Cause(err, "close outbound/", out.Type(), "[", i, "]")
+		})
+	}
+	s.logger.Trace("closing router")
+	if err := common.Close(s.router); err != nil {
+		errors = E.Append(errors, err, func(err error) error {
+			return E.Cause(err, "close router")
+		})
+	}
+	for serviceName, service := range s.preServices {
+		s.logger.Trace("closing ", serviceName)
+		errors = E.Append(errors, service.Close(), func(err error) error {
+			return E.Cause(err, "close ", serviceName)
+		})
+	}
+	s.logger.Trace("closing log factory")
+	if err := common.Close(s.logFactory); err != nil {
+		errors = E.Append(errors, err, func(err error) error {
+			return E.Cause(err, "close log factory")
+		})
+	}
+	return errors
+}
+
+func (s *Box) Router() adapter.Router {
+	return s.router
 }

cmd/internal/build/main.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"os"
+	"os/exec"
+
+	"github.com/sagernet/sing-box/cmd/internal/build_shared"
+	"github.com/sagernet/sing-box/log"
+)
+
+func main() {
+	build_shared.FindSDK()
+
+	command := exec.Command(os.Args[1], os.Args[2:]...)
+	command.Stdout = os.Stdout
+	command.Stderr = os.Stderr
+	err := command.Run()
+	if err != nil {
+		log.Fatal(err)
+	}
+}

cmd/internal/build_libbox/main.go

@@ -0,0 +1,136 @@
+package main
+
+import (
+	"flag"
+	"os"
+	"os/exec"
+	"path/filepath"
+
+	_ "github.com/sagernet/gomobile/event/key"
+	"github.com/sagernet/sing-box/cmd/internal/build_shared"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing/common/rw"
+)
+
+var (
+	debugEnabled bool
+	target       string
+)
+
+func init() {
+	flag.BoolVar(&debugEnabled, "debug", false, "enable debug")
+	flag.StringVar(&target, "target", "android", "target platform")
+}
+
+func main() {
+	flag.Parse()
+
+	build_shared.FindMobile()
+
+	switch target {
+	case "android":
+		buildAndroid()
+	case "ios":
+		buildiOS()
+	}
+}
+
+var (
+	sharedFlags []string
+	debugFlags  []string
+)
+
+func init() {
+	sharedFlags = append(sharedFlags, "-trimpath")
+	sharedFlags = append(sharedFlags, "-ldflags")
+
+	currentTag, err := build_shared.ReadTag()
+	if err != nil {
+		currentTag = "unknown"
+	}
+	sharedFlags = append(sharedFlags, "-X github.com/sagernet/sing-box/constant.Version="+currentTag+" -s -w -buildid=")
+	debugFlags = append(debugFlags, "-X github.com/sagernet/sing-box/constant.Version="+currentTag)
+}
+
+func buildAndroid() {
+	build_shared.FindSDK()
+
+	args := []string{
+		"bind",
+		"-v",
+		"-androidapi", "21",
+		"-javapkg=io.nekohasekai",
+		"-libname=box",
+	}
+	if !debugEnabled {
+		args = append(args, sharedFlags...)
+	} else {
+		args = append(args, debugFlags...)
+	}
+
+	args = append(args, "-tags")
+	if !debugEnabled {
+		args = append(args, "with_gvisor,with_quic,with_wireguard,with_utls,with_clash_api")
+	} else {
+		args = append(args, "with_gvisor,with_quic,with_wireguard,with_utls,with_clash_api,debug")
+	}
+	args = append(args, "./experimental/libbox")
+
+	command := exec.Command(build_shared.GoBinPath+"/gomobile", args...)
+	command.Stdout = os.Stdout
+	command.Stderr = os.Stderr
+	err := command.Run()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	const name = "libbox.aar"
+	copyPath := filepath.Join("..", "sing-box-for-android", "app", "libs")
+	if rw.FileExists(copyPath) {
+		copyPath, _ = filepath.Abs(copyPath)
+		err = rw.CopyFile(name, filepath.Join(copyPath, name))
+		if err != nil {
+			log.Fatal(err)
+		}
+		log.Info("copied to ", copyPath)
+	}
+}
+
+func buildiOS() {
+	args := []string{
+		"bind",
+		"-v",
+		"-target", "ios,iossimulator,macos",
+		"-libname=box",
+	}
+	if !debugEnabled {
+		args = append(args, sharedFlags...)
+	} else {
+		args = append(args, debugFlags...)
+	}
+
+	args = append(args, "-tags")
+	if !debugEnabled {
+		args = append(args, "with_gvisor,with_quic,with_utls,with_clash_api,with_low_memory,with_conntrack")
+	} else {
+		args = append(args, "with_gvisor,with_quic,with_utls,with_clash_api,with_low_memory,with_conntrack,debug")
+	}
+	args = append(args, "./experimental/libbox")
+
+	command := exec.Command(build_shared.GoBinPath+"/gomobile", args...)
+	command.Stdout = os.Stdout
+	command.Stderr = os.Stderr
+	err := command.Run()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	copyPath := filepath.Join("..", "sing-box-for-ios")
+	if rw.FileExists(copyPath) {
+		targetDir := filepath.Join(copyPath, "Libbox.xcframework")
+		targetDir, _ = filepath.Abs(targetDir)
+		os.RemoveAll(targetDir)
+		os.Rename("Libbox.xcframework", targetDir)
+		log.Info("copied to ", targetDir)
+	}
+}

cmd/internal/build_shared/sdk.go

@@ -0,0 +1,92 @@
+package build_shared
+
+import (
+	"go/build"
+	"os"
+	"path/filepath"
+	"runtime"
+	"sort"
+	"strconv"
+	"strings"
+
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/rw"
+)
+
+var (
+	androidSDKPath string
+	androidNDKPath string
+)
+
+func FindSDK() {
+	searchPath := []string{
+		"$ANDROID_HOME",
+		"$HOME/Android/Sdk",
+		"$HOME/.local/lib/android/sdk",
+		"$HOME/Library/Android/sdk",
+	}
+	for _, path := range searchPath {
+		path = os.ExpandEnv(path)
+		if rw.FileExists(path + "/licenses/android-sdk-license") {
+			androidSDKPath = path
+			break
+		}
+	}
+	if androidSDKPath == "" {
+		log.Fatal("android SDK not found")
+	}
+	if !findNDK() {
+		log.Fatal("android NDK not found")
+	}
+
+	os.Setenv("ANDROID_HOME", androidSDKPath)
+	os.Setenv("ANDROID_SDK_HOME", androidSDKPath)
+	os.Setenv("ANDROID_NDK_HOME", androidNDKPath)
+	os.Setenv("NDK", androidNDKPath)
+	os.Setenv("PATH", os.Getenv("PATH")+":"+filepath.Join(androidNDKPath, "toolchains", "llvm", "prebuilt", runtime.GOOS+"-x86_64", "bin"))
+}
+
+func findNDK() bool {
+	if rw.FileExists(androidSDKPath + "/ndk/25.1.8937393") {
+		androidNDKPath = androidSDKPath + "/ndk/25.1.8937393"
+		return true
+	}
+	ndkVersions, err := os.ReadDir(androidSDKPath + "/ndk")
+	if err != nil {
+		return false
+	}
+	versionNames := common.Map(ndkVersions, os.DirEntry.Name)
+	if len(versionNames) == 0 {
+		return false
+	}
+	sort.Slice(versionNames, func(i, j int) bool {
+		iVersions := strings.Split(versionNames[i], ".")
+		jVersions := strings.Split(versionNames[j], ".")
+		for k := 0; k < len(iVersions) && k < len(jVersions); k++ {
+			iVersion, _ := strconv.Atoi(iVersions[k])
+			jVersion, _ := strconv.Atoi(jVersions[k])
+			if iVersion != jVersion {
+				return iVersion > jVersion
+			}
+		}
+		return true
+	})
+	for _, versionName := range versionNames {
+		if rw.FileExists(androidSDKPath + "/ndk/" + versionName) {
+			androidNDKPath = androidSDKPath + "/ndk/" + versionName
+			return true
+		}
+	}
+	return false
+}
+
+var GoBinPath string
+
+func FindMobile() {
+	goBin := filepath.Join(build.Default.GOPATH, "bin")
+	if !rw.FileExists(goBin + "/" + "gobind") {
+		log.Fatal("missing gomobile installation")
+	}
+	GoBinPath = goBin
+}

cmd/internal/build_shared/tag.go

@@ -0,0 +1,16 @@
+package build_shared
+
+import "github.com/sagernet/sing/common/shell"
+
+func ReadTag() (string, error) {
+	currentTag, err := shell.Exec("git", "describe", "--tags").ReadOutput()
+	if err != nil {
+		return currentTag, err
+	}
+	currentTagRev, _ := shell.Exec("git", "describe", "--tags", "--abbrev=0").ReadOutput()
+	if currentTagRev == currentTag {
+		return currentTag[1:], nil
+	}
+	shortCommit, _ := shell.Exec("git", "rev-parse", "--short", "HEAD").ReadOutput()
+	return currentTagRev[1:] + "-" + shortCommit, nil
+}

cmd/internal/read_tag/main.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"os"
+
+	"github.com/sagernet/sing-box/cmd/internal/build_shared"
+	"github.com/sagernet/sing-box/log"
+)
+
+func main() {
+	currentTag, err := build_shared.ReadTag()
+	if err != nil {
+		log.Error(err)
+		_, err = os.Stdout.WriteString("unknown\n")
+	} else {
+		_, err = os.Stdout.WriteString(currentTag + "\n")
+	}
+	if err != nil {
+		log.Error(err)
+	}
+}

cmd/sing-box/cmd_check.go

@@ -26,12 +26,18 @@ func init() {
 }
 
 func check() error {
-	options, err := readConfig()
+	options, err := readConfigAndMerge()
 	if err != nil {
 		return err
 	}
 	ctx, cancel := context.WithCancel(context.Background())
-	_, err = box.New(ctx, options)
+	instance, err := box.New(box.Options{
+		Context: ctx,
+		Options: options,
+	})
+	if err == nil {
+		instance.Close()
+	}
 	cancel()
 	return err
 }

cmd/sing-box/cmd_format.go

@@ -33,6 +33,44 @@ func init() {
 }
 
 func format() error {
+	optionsList, err := readConfig()
+	if err != nil {
+		return err
+	}
+	for _, optionsEntry := range optionsList {
+		buffer := new(bytes.Buffer)
+		encoder := json.NewEncoder(buffer)
+		encoder.SetIndent("", "  ")
+		err = encoder.Encode(optionsEntry.options)
+		if err != nil {
+			return E.Cause(err, "encode config")
+		}
+		outputPath, _ := filepath.Abs(optionsEntry.path)
+		if !commandFormatFlagWrite {
+			if len(optionsList) > 1 {
+				os.Stdout.WriteString(outputPath + "\n")
+			}
+			os.Stdout.WriteString(buffer.String() + "\n")
+			continue
+		}
+		if bytes.Equal(optionsEntry.content, buffer.Bytes()) {
+			continue
+		}
+		output, err := os.Create(optionsEntry.path)
+		if err != nil {
+			return E.Cause(err, "open output")
+		}
+		_, err = output.Write(buffer.Bytes())
+		output.Close()
+		if err != nil {
+			return E.Cause(err, "write output")
+		}
+		os.Stderr.WriteString(outputPath + "\n")
+	}
+	return nil
+}
+
+func formatOne(configPath string) error {
 	configContent, err := os.ReadFile(configPath)
 	if err != nil {
 		return E.Cause(err, "read config")

cmd/sing-box/cmd_generate.go

@@ -0,0 +1,139 @@
+package main
+
+import (
+	"crypto/rand"
+	"encoding/base64"
+	"encoding/hex"
+	"os"
+	"strconv"
+
+	"github.com/sagernet/sing-box/log"
+
+	"github.com/gofrs/uuid/v5"
+	"github.com/spf13/cobra"
+	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
+)
+
+var commandGenerate = &cobra.Command{
+	Use:   "generate",
+	Short: "Generate things",
+}
+
+func init() {
+	commandGenerate.AddCommand(commandGenerateUUID)
+	commandGenerate.AddCommand(commandGenerateRandom)
+	commandGenerate.AddCommand(commandGenerateWireGuardKeyPair)
+	commandGenerate.AddCommand(commandGenerateRealityKeyPair)
+	mainCommand.AddCommand(commandGenerate)
+}
+
+var (
+	outputBase64 bool
+	outputHex    bool
+)
+
+var commandGenerateRandom = &cobra.Command{
+	Use:   "rand <length>",
+	Short: "Generate random bytes",
+	Args:  cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		err := generateRandom(args)
+		if err != nil {
+			log.Fatal(err)
+		}
+	},
+}
+
+func init() {
+	commandGenerateRandom.Flags().BoolVar(&outputBase64, "base64", false, "Generate base64 string")
+	commandGenerateRandom.Flags().BoolVar(&outputHex, "hex", false, "Generate hex string")
+}
+
+func generateRandom(args []string) error {
+	length, err := strconv.Atoi(args[0])
+	if err != nil {
+		return err
+	}
+
+	randomBytes := make([]byte, length)
+	_, err = rand.Read(randomBytes)
+	if err != nil {
+		return err
+	}
+
+	if outputBase64 {
+		_, err = os.Stdout.WriteString(base64.StdEncoding.EncodeToString(randomBytes) + "\n")
+	} else if outputHex {
+		_, err = os.Stdout.WriteString(hex.EncodeToString(randomBytes) + "\n")
+	} else {
+		_, err = os.Stdout.Write(randomBytes)
+	}
+
+	return err
+}
+
+var commandGenerateUUID = &cobra.Command{
+	Use:   "uuid",
+	Short: "Generate UUID string",
+	Args:  cobra.NoArgs,
+	Run: func(cmd *cobra.Command, args []string) {
+		err := generateUUID()
+		if err != nil {
+			log.Fatal(err)
+		}
+	},
+}
+
+func generateUUID() error {
+	newUUID, err := uuid.NewV4()
+	if err != nil {
+		return err
+	}
+	_, err = os.Stdout.WriteString(newUUID.String() + "\n")
+	return err
+}
+
+var commandGenerateWireGuardKeyPair = &cobra.Command{
+	Use:   "wg-keypair",
+	Short: "Generate WireGuard key pair",
+	Args:  cobra.NoArgs,
+	Run: func(cmd *cobra.Command, args []string) {
+		err := generateWireGuardKey()
+		if err != nil {
+			log.Fatal(err)
+		}
+	},
+}
+
+func generateWireGuardKey() error {
+	privateKey, err := wgtypes.GeneratePrivateKey()
+	if err != nil {
+		return err
+	}
+	os.Stdout.WriteString("PrivateKey: " + privateKey.String() + "\n")
+	os.Stdout.WriteString("PublicKey: " + privateKey.PublicKey().String() + "\n")
+	return nil
+}
+
+var commandGenerateRealityKeyPair = &cobra.Command{
+	Use:   "reality-keypair",
+	Short: "Generate reality key pair",
+	Args:  cobra.NoArgs,
+	Run: func(cmd *cobra.Command, args []string) {
+		err := generateRealityKey()
+		if err != nil {
+			log.Fatal(err)
+		}
+	},
+}
+
+func generateRealityKey() error {
+	privateKey, err := wgtypes.GeneratePrivateKey()
+	if err != nil {
+		return err
+	}
+	publicKey := privateKey.PublicKey()
+	os.Stdout.WriteString("PrivateKey: " + base64.RawURLEncoding.EncodeToString(privateKey[:]) + "\n")
+	os.Stdout.WriteString("PublicKey: " + base64.RawURLEncoding.EncodeToString(publicKey[:]) + "\n")
+	return nil
+}

cmd/sing-box/cmd_run.go

@@ -5,10 +5,15 @@ import (
 	"io"
 	"os"
 	"os/signal"
+	"path/filepath"
 	runtimeDebug "runtime/debug"
+	"sort"
+	"strings"
 	"syscall"
+	"time"
 
 	"github.com/sagernet/sing-box"
+	"github.com/sagernet/sing-box/common/badjsonmerge"
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
 	E "github.com/sagernet/sing/common/exceptions"
@@ -31,29 +36,88 @@ func init() {
 	mainCommand.AddCommand(commandRun)
 }
 
-func readConfig() (option.Options, error) {
+type OptionsEntry struct {
+	content []byte
+	path    string
+	options option.Options
+}
+
+func readConfigAt(path string) (*OptionsEntry, error) {
 	var (
 		configContent []byte
 		err           error
 	)
-	if configPath == "stdin" {
+	if path == "stdin" {
 		configContent, err = io.ReadAll(os.Stdin)
 	} else {
-		configContent, err = os.ReadFile(configPath)
+		configContent, err = os.ReadFile(path)
 	}
 	if err != nil {
-		return option.Options{}, E.Cause(err, "read config")
+		return nil, E.Cause(err, "read config at ", path)
 	}
 	var options option.Options
 	err = options.UnmarshalJSON(configContent)
 	if err != nil {
-		return option.Options{}, E.Cause(err, "decode config")
+		return nil, E.Cause(err, "decode config at ", path)
 	}
-	return options, nil
+	return &OptionsEntry{
+		content: configContent,
+		path:    path,
+		options: options,
+	}, nil
+}
+
+func readConfig() ([]*OptionsEntry, error) {
+	var optionsList []*OptionsEntry
+	for _, path := range configPaths {
+		optionsEntry, err := readConfigAt(path)
+		if err != nil {
+			return nil, err
+		}
+		optionsList = append(optionsList, optionsEntry)
+	}
+	for _, directory := range configDirectories {
+		entries, err := os.ReadDir(directory)
+		if err != nil {
+			return nil, E.Cause(err, "read config directory at ", directory)
+		}
+		for _, entry := range entries {
+			if !strings.HasSuffix(entry.Name(), ".json") || entry.IsDir() {
+				continue
+			}
+			optionsEntry, err := readConfigAt(filepath.Join(directory, entry.Name()))
+			if err != nil {
+				return nil, err
+			}
+			optionsList = append(optionsList, optionsEntry)
+		}
+	}
+	sort.Slice(optionsList, func(i, j int) bool {
+		return optionsList[i].path < optionsList[j].path
+	})
+	return optionsList, nil
+}
+
+func readConfigAndMerge() (option.Options, error) {
+	optionsList, err := readConfig()
+	if err != nil {
+		return option.Options{}, err
+	}
+	if len(optionsList) == 1 {
+		return optionsList[0].options, nil
+	}
+	var mergedOptions option.Options
+	for _, options := range optionsList {
+		mergedOptions, err = badjsonmerge.MergeOptions(options.options, mergedOptions)
+		if err != nil {
+			return option.Options{}, E.Cause(err, "merge config at ", options.path)
+		}
+	}
+	return mergedOptions, nil
 }
 
 func create() (*box.Box, context.CancelFunc, error) {
-	options, err := readConfig()
+	options, err := readConfigAndMerge()
 	if err != nil {
 		return nil, nil, err
 	}
@@ -64,11 +128,28 @@ func create() (*box.Box, context.CancelFunc, error) {
 		options.Log.DisableColor = true
 	}
 	ctx, cancel := context.WithCancel(context.Background())
-	instance, err := box.New(ctx, options)
+	instance, err := box.New(box.Options{
+		Context: ctx,
+		Options: options,
+	})
 	if err != nil {
 		cancel()
 		return nil, nil, E.Cause(err, "create service")
 	}
+
+	osSignals := make(chan os.Signal, 1)
+	signal.Notify(osSignals, os.Interrupt, syscall.SIGTERM, syscall.SIGHUP)
+	defer func() {
+		signal.Stop(osSignals)
+		close(osSignals)
+	}()
+
+	go func() {
+		_, loaded := <-osSignals
+		if loaded {
+			cancel()
+		}
+	}()
 	err = instance.Start()
 	if err != nil {
 		cancel()
@@ -80,6 +161,7 @@ func create() (*box.Box, context.CancelFunc, error) {
 func run() error {
 	osSignals := make(chan os.Signal, 1)
 	signal.Notify(osSignals, os.Interrupt, syscall.SIGTERM, syscall.SIGHUP)
+	defer signal.Stop(osSignals)
 	for {
 		instance, cancel, err := create()
 		if err != nil {
@@ -96,7 +178,10 @@ func run() error {
 				}
 			}
 			cancel()
+			closeCtx, closed := context.WithCancel(context.Background())
+			go closeMonitor(closeCtx)
 			instance.Close()
+			closed()
 			if osSignal != syscall.SIGHUP {
 				return nil
 			}
@@ -104,3 +189,13 @@ func run() error {
 		}
 	}
 }
+
+func closeMonitor(ctx context.Context) {
+	time.Sleep(3 * time.Second)
+	select {
+	case <-ctx.Done():
+		return
+	default:
+	}
+	log.Fatal("sing-box did not close!")
+}

cmd/sing-box/cmd_tools.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"github.com/sagernet/sing-box"
+	E "github.com/sagernet/sing/common/exceptions"
+	N "github.com/sagernet/sing/common/network"
+
+	"github.com/spf13/cobra"
+)
+
+var commandToolsFlagOutbound string
+
+var commandTools = &cobra.Command{
+	Use:   "tools",
+	Short: "Experimental tools",
+}
+
+func init() {
+	commandTools.PersistentFlags().StringVarP(&commandToolsFlagOutbound, "outbound", "o", "", "Use specified tag instead of default outbound")
+	mainCommand.AddCommand(commandTools)
+}
+
+func createPreStartedClient() (*box.Box, error) {
+	options, err := readConfigAndMerge()
+	if err != nil {
+		return nil, err
+	}
+	instance, err := box.New(box.Options{Options: options})
+	if err != nil {
+		return nil, E.Cause(err, "create service")
+	}
+	err = instance.PreStart()
+	if err != nil {
+		return nil, E.Cause(err, "start service")
+	}
+	return instance, nil
+}
+
+func createDialer(instance *box.Box, network string, outboundTag string) (N.Dialer, error) {
+	if outboundTag == "" {
+		outbound := instance.Router().DefaultOutbound(N.NetworkName(network))
+		if outbound == nil {
+			return nil, E.New("missing default outbound")
+		}
+		return outbound, nil
+	} else {
+		outbound, loaded := instance.Router().Outbound(outboundTag)
+		if !loaded {
+			return nil, E.New("outbound not found: ", outboundTag)
+		}
+		return outbound, nil
+	}
+}

cmd/sing-box/cmd_tools_connect.go

@@ -0,0 +1,73 @@
+package main
+
+import (
+	"context"
+	"os"
+
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/bufio"
+	E "github.com/sagernet/sing/common/exceptions"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/common/task"
+
+	"github.com/spf13/cobra"
+)
+
+var commandConnectFlagNetwork string
+
+var commandConnect = &cobra.Command{
+	Use:   "connect [address]",
+	Short: "Connect to an address",
+	Args:  cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		err := connect(args[0])
+		if err != nil {
+			log.Fatal(err)
+		}
+	},
+}
+
+func init() {
+	commandConnect.Flags().StringVarP(&commandConnectFlagNetwork, "network", "n", "tcp", "network type")
+	commandTools.AddCommand(commandConnect)
+}
+
+func connect(address string) error {
+	switch N.NetworkName(commandConnectFlagNetwork) {
+	case N.NetworkTCP, N.NetworkUDP:
+	default:
+		return E.Cause(N.ErrUnknownNetwork, commandConnectFlagNetwork)
+	}
+	instance, err := createPreStartedClient()
+	if err != nil {
+		return err
+	}
+	defer instance.Close()
+	dialer, err := createDialer(instance, commandConnectFlagNetwork, commandToolsFlagOutbound)
+	if err != nil {
+		return err
+	}
+	conn, err := dialer.DialContext(context.Background(), commandConnectFlagNetwork, M.ParseSocksaddr(address))
+	if err != nil {
+		return E.Cause(err, "connect to server")
+	}
+	var group task.Group
+	group.Append("upload", func(ctx context.Context) error {
+		return common.Error(bufio.Copy(conn, os.Stdin))
+	})
+	group.Append("download", func(ctx context.Context) error {
+		return common.Error(bufio.Copy(os.Stdout, conn))
+	})
+	group.Cleanup(func() {
+		conn.Close()
+	})
+	err = group.Run(context.Background())
+	if E.IsClosed(err) {
+		log.Info(err)
+	} else {
+		log.Error(err)
+	}
+	return nil
+}

cmd/sing-box/cmd_tools_fetch.go

@@ -0,0 +1,91 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"io"
+	"net"
+	"net/http"
+	"net/url"
+	"os"
+
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing/common/bufio"
+	M "github.com/sagernet/sing/common/metadata"
+
+	"github.com/spf13/cobra"
+)
+
+var commandFetch = &cobra.Command{
+	Use:   "fetch",
+	Short: "Fetch an URL",
+	Args:  cobra.MinimumNArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		err := fetch(args)
+		if err != nil {
+			log.Fatal(err)
+		}
+	},
+}
+
+func init() {
+	commandTools.AddCommand(commandFetch)
+}
+
+var httpClient *http.Client
+
+func fetch(args []string) error {
+	instance, err := createPreStartedClient()
+	if err != nil {
+		return err
+	}
+	defer instance.Close()
+	httpClient = &http.Client{
+		Transport: &http.Transport{
+			DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
+				dialer, err := createDialer(instance, network, commandToolsFlagOutbound)
+				if err != nil {
+					return nil, err
+				}
+				return dialer.DialContext(ctx, network, M.ParseSocksaddr(addr))
+			},
+			ForceAttemptHTTP2: true,
+		},
+	}
+	defer httpClient.CloseIdleConnections()
+	for _, urlString := range args {
+		parsedURL, err := url.Parse(urlString)
+		if err != nil {
+			return err
+		}
+		switch parsedURL.Scheme {
+		case "":
+			parsedURL.Scheme = "http"
+			fallthrough
+		case "http", "https":
+			err = fetchHTTP(parsedURL)
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func fetchHTTP(parsedURL *url.URL) error {
+	request, err := http.NewRequest("GET", parsedURL.String(), nil)
+	if err != nil {
+		return err
+	}
+	request.Header.Add("User-Agent", "curl/7.88.0")
+	response, err := httpClient.Do(request)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+	_, err = bufio.Copy(os.Stdout, response.Body)
+	if errors.Is(err, io.EOF) {
+		return nil
+	}
+	return err
+}

cmd/sing-box/cmd_tools_synctime.go

@@ -0,0 +1,69 @@
+package main
+
+import (
+	"context"
+	"os"
+
+	"github.com/sagernet/sing-box/common/settings"
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/log"
+	E "github.com/sagernet/sing/common/exceptions"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/sing/common/ntp"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	commandSyncTimeFlagServer   string
+	commandSyncTimeOutputFormat string
+	commandSyncTimeWrite        bool
+)
+
+var commandSyncTime = &cobra.Command{
+	Use:   "synctime",
+	Short: "Sync time using the NTP protocol",
+	Args:  cobra.NoArgs,
+	Run: func(cmd *cobra.Command, args []string) {
+		err := syncTime()
+		if err != nil {
+			log.Fatal(err)
+		}
+	},
+}
+
+func init() {
+	commandSyncTime.Flags().StringVarP(&commandSyncTimeFlagServer, "server", "s", "time.apple.com", "Set NTP server")
+	commandSyncTime.Flags().StringVarP(&commandSyncTimeOutputFormat, "format", "f", C.TimeLayout, "Set output format")
+	commandSyncTime.Flags().BoolVarP(&commandSyncTimeWrite, "write", "w", false, "Write time to system")
+	commandTools.AddCommand(commandSyncTime)
+}
+
+func syncTime() error {
+	instance, err := createPreStartedClient()
+	if err != nil {
+		return err
+	}
+	dialer, err := createDialer(instance, N.NetworkUDP, commandToolsFlagOutbound)
+	if err != nil {
+		return err
+	}
+	defer instance.Close()
+	serverAddress := M.ParseSocksaddr(commandSyncTimeFlagServer)
+	if serverAddress.Port == 0 {
+		serverAddress.Port = 123
+	}
+	response, err := ntp.Exchange(context.Background(), dialer, serverAddress)
+	if err != nil {
+		return err
+	}
+	if commandSyncTimeWrite {
+		err = settings.SetSystemTime(response.Time)
+		if err != nil {
+			return E.Cause(err, "write time to system")
+		}
+	}
+	os.Stdout.WriteString(response.Time.Local().Format(commandSyncTimeOutputFormat))
+	return nil
+}

cmd/sing-box/cmd_version.go

@@ -3,9 +3,9 @@ package main
 import (
 	"os"
 	"runtime"
+	"runtime/debug"
 
 	C "github.com/sagernet/sing-box/constant"
-	F "github.com/sagernet/sing/common/format"
 
 	"github.com/spf13/cobra"
 )
@@ -25,30 +25,40 @@ func init() {
 }
 
 func printVersion(cmd *cobra.Command, args []string) {
-	var version string
-	if !nameOnly {
-		version = "sing-box "
+	if nameOnly {
+		os.Stdout.WriteString(C.Version + "\n")
+		return
 	}
-	version += F.ToString(C.Version)
-	if C.Commit != "" {
-		version += "." + C.Commit
-	}
-	if !nameOnly {
-		version += " ("
-		version += runtime.Version()
-		version += ", "
-		version += runtime.GOOS
-		version += "/"
-		version += runtime.GOARCH
-		version += ", "
-		version += "CGO "
-		if C.CGO_ENABLED {
-			version += "enabled"
-		} else {
-			version += "disabled"
+	version := "sing-box version " + C.Version + "\n\n"
+	version += "Environment: " + runtime.Version() + " " + runtime.GOOS + "/" + runtime.GOARCH + "\n"
+
+	var tags string
+	var revision string
+
+	debugInfo, loaded := debug.ReadBuildInfo()
+	if loaded {
+		for _, setting := range debugInfo.Settings {
+			switch setting.Key {
+			case "-tags":
+				tags = setting.Value
+			case "vcs.revision":
+				revision = setting.Value
+			}
 		}
-		version += ")"
 	}
-	version += "\n"
+
+	if tags != "" {
+		version += "Tags: " + tags + "\n"
+	}
+	if revision != "" {
+		version += "Revision: " + revision + "\n"
+	}
+
+	if C.CGO_ENABLED {
+		version += "CGO: enabled\n"
+	} else {
+		version += "CGO: disabled\n"
+	}
+
 	os.Stdout.WriteString(version)
 }

cmd/sing-box/debug.go

@@ -25,9 +25,9 @@ func init() {
 		runtime.ReadMemStats(&memStats)
 
 		var memObject badjson.JSONObject
-		memObject.Put("heap", humanize.Bytes(memStats.HeapInuse))
-		memObject.Put("stack", humanize.Bytes(memStats.StackInuse))
-		memObject.Put("idle", humanize.Bytes(memStats.HeapIdle-memStats.HeapReleased))
+		memObject.Put("heap", humanize.IBytes(memStats.HeapInuse))
+		memObject.Put("stack", humanize.IBytes(memStats.StackInuse))
+		memObject.Put("idle", humanize.IBytes(memStats.HeapIdle-memStats.HeapReleased))
 		memObject.Put("goroutines", runtime.NumGoroutine())
 		memObject.Put("rss", rusageMaxRSS())
 

cmd/sing-box/main.go

@@ -2,16 +2,19 @@ package main
 
 import (
 	"os"
+	"time"
 
+	_ "github.com/sagernet/sing-box/include"
 	"github.com/sagernet/sing-box/log"
 
 	"github.com/spf13/cobra"
 )
 
 var (
-	configPath   string
-	workingDir   string
-	disableColor bool
+	configPaths       []string
+	configDirectories []string
+	workingDir        string
+	disableColor      bool
 )
 
 var mainCommand = &cobra.Command{
@@ -20,7 +23,8 @@ var mainCommand = &cobra.Command{
 }
 
 func init() {
-	mainCommand.PersistentFlags().StringVarP(&configPath, "config", "c", "config.json", "set configuration file path")
+	mainCommand.PersistentFlags().StringArrayVarP(&configPaths, "config", "c", nil, "set configuration file path")
+	mainCommand.PersistentFlags().StringArrayVarP(&configDirectories, "config-directory", "C", nil, "set configuration directory path")
 	mainCommand.PersistentFlags().StringVarP(&workingDir, "directory", "D", "", "set working directory")
 	mainCommand.PersistentFlags().BoolVarP(&disableColor, "disable-color", "", false, "disable color output")
 }
@@ -32,9 +36,19 @@ func main() {
 }
 
 func preRun(cmd *cobra.Command, args []string) {
+	if disableColor {
+		log.SetStdLogger(log.NewFactory(log.Formatter{BaseTime: time.Now(), DisableColors: true}, os.Stderr, nil).Logger())
+	}
 	if workingDir != "" {
+		_, err := os.Stat(workingDir)
+		if err != nil {
+			os.MkdirAll(workingDir, 0o777)
+		}
 		if err := os.Chdir(workingDir); err != nil {
 			log.Fatal(err)
 		}
 	}
+	if len(configPaths) == 0 && len(configDirectories) == 0 {
+		configPaths = append(configPaths, "config.json")
+	}
 }

common/baderror/baderror.go

@@ -26,7 +26,7 @@ func WrapH2(err error) error {
 	if err == io.ErrUnexpectedEOF {
 		return io.EOF
 	}
-	if Contains(err, "client disconnected", "body closed by handler") {
+	if Contains(err, "client disconnected", "body closed by handler", "response body closed", "; CANCEL") {
 		return net.ErrClosed
 	}
 	return err

common/badjsonmerge/merge.go

@@ -0,0 +1,80 @@
+package badjsonmerge
+
+import (
+	"encoding/json"
+	"reflect"
+
+	"github.com/sagernet/sing-box/common/badjson"
+	"github.com/sagernet/sing-box/option"
+	E "github.com/sagernet/sing/common/exceptions"
+)
+
+func MergeOptions(source option.Options, destination option.Options) (option.Options, error) {
+	rawSource, err := json.Marshal(source)
+	if err != nil {
+		return option.Options{}, E.Cause(err, "marshal source")
+	}
+	rawDestination, err := json.Marshal(destination)
+	if err != nil {
+		return option.Options{}, E.Cause(err, "marshal destination")
+	}
+	rawMerged, err := MergeJSON(rawSource, rawDestination)
+	if err != nil {
+		return option.Options{}, E.Cause(err, "merge options")
+	}
+	var merged option.Options
+	err = json.Unmarshal(rawMerged, &merged)
+	if err != nil {
+		return option.Options{}, E.Cause(err, "unmarshal merged options")
+	}
+	return merged, nil
+}
+
+func MergeJSON(rawSource json.RawMessage, rawDestination json.RawMessage) (json.RawMessage, error) {
+	source, err := badjson.Decode(rawSource)
+	if err != nil {
+		return nil, E.Cause(err, "decode source")
+	}
+	destination, err := badjson.Decode(rawDestination)
+	if err != nil {
+		return nil, E.Cause(err, "decode destination")
+	}
+	merged, err := mergeJSON(source, destination)
+	if err != nil {
+		return nil, err
+	}
+	return json.Marshal(merged)
+}
+
+func mergeJSON(anySource any, anyDestination any) (any, error) {
+	switch destination := anyDestination.(type) {
+	case badjson.JSONArray:
+		switch source := anySource.(type) {
+		case badjson.JSONArray:
+			destination = append(destination, source...)
+		default:
+			destination = append(destination, source)
+		}
+		return destination, nil
+	case *badjson.JSONObject:
+		switch source := anySource.(type) {
+		case *badjson.JSONObject:
+			for _, entry := range source.Entries() {
+				oldValue, loaded := destination.Get(entry.Key)
+				if loaded {
+					var err error
+					entry.Value, err = mergeJSON(entry.Value, oldValue)
+					if err != nil {
+						return nil, E.Cause(err, "merge object item ", entry.Key)
+					}
+				}
+				destination.Put(entry.Key, entry.Value)
+			}
+		default:
+			return nil, E.New("cannot merge json object into ", reflect.TypeOf(destination))
+		}
+		return destination, nil
+	default:
+		return destination, nil
+	}
+}

common/badjsonmerge/merge_test.go

@@ -0,0 +1,59 @@
+package badjsonmerge
+
+import (
+	"testing"
+
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/option"
+	N "github.com/sagernet/sing/common/network"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestMergeJSON(t *testing.T) {
+	t.Parallel()
+	options := option.Options{
+		Log: &option.LogOptions{
+			Level: "info",
+		},
+		Route: &option.RouteOptions{
+			Rules: []option.Rule{
+				{
+					Type: C.RuleTypeDefault,
+					DefaultOptions: option.DefaultRule{
+						Network:  []string{N.NetworkTCP},
+						Outbound: "direct",
+					},
+				},
+			},
+		},
+	}
+	anotherOptions := option.Options{
+		Outbounds: []option.Outbound{
+			{
+				Type: C.TypeDirect,
+				Tag:  "direct",
+			},
+		},
+	}
+	thirdOptions := option.Options{
+		Route: &option.RouteOptions{
+			Rules: []option.Rule{
+				{
+					Type: C.RuleTypeDefault,
+					DefaultOptions: option.DefaultRule{
+						Network:  []string{N.NetworkUDP},
+						Outbound: "direct",
+					},
+				},
+			},
+		},
+	}
+	mergeOptions, err := MergeOptions(options, anotherOptions)
+	require.NoError(t, err)
+	mergeOptions, err = MergeOptions(thirdOptions, mergeOptions)
+	require.NoError(t, err)
+	require.Equal(t, "info", mergeOptions.Log.Level)
+	require.Equal(t, 2, len(mergeOptions.Route.Rules))
+	require.Equal(t, C.TypeDirect, mergeOptions.Outbounds[0].Type)
+}

common/badtls/badtls.go

@@ -0,0 +1,210 @@
+//go:build go1.19 && !go1.20
+
+package badtls
+
+import (
+	"crypto/cipher"
+	"crypto/rand"
+	"crypto/tls"
+	"encoding/binary"
+	"io"
+	"net"
+	"reflect"
+	"sync"
+	"sync/atomic"
+	"unsafe"
+
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/buf"
+	"github.com/sagernet/sing/common/bufio"
+	E "github.com/sagernet/sing/common/exceptions"
+	N "github.com/sagernet/sing/common/network"
+)
+
+type Conn struct {
+	*tls.Conn
+	writer           N.ExtendedWriter
+	activeCall       *int32
+	closeNotifySent  *bool
+	version          *uint16
+	rand             io.Reader
+	halfAccess       *sync.Mutex
+	halfError        *error
+	cipher           cipher.AEAD
+	explicitNonceLen int
+	halfPtr          uintptr
+	halfSeq          []byte
+	halfScratchBuf   []byte
+}
+
+func Create(conn *tls.Conn) (TLSConn, error) {
+	if !handshakeComplete(conn) {
+		return nil, E.New("handshake not finished")
+	}
+	rawConn := reflect.Indirect(reflect.ValueOf(conn))
+	rawActiveCall := rawConn.FieldByName("activeCall")
+	if !rawActiveCall.IsValid() || rawActiveCall.Kind() != reflect.Int32 {
+		return nil, E.New("badtls: invalid active call")
+	}
+	activeCall := (*int32)(unsafe.Pointer(rawActiveCall.UnsafeAddr()))
+	rawHalfConn := rawConn.FieldByName("out")
+	if !rawHalfConn.IsValid() || rawHalfConn.Kind() != reflect.Struct {
+		return nil, E.New("badtls: invalid half conn")
+	}
+	rawVersion := rawConn.FieldByName("vers")
+	if !rawVersion.IsValid() || rawVersion.Kind() != reflect.Uint16 {
+		return nil, E.New("badtls: invalid version")
+	}
+	version := (*uint16)(unsafe.Pointer(rawVersion.UnsafeAddr()))
+	rawCloseNotifySent := rawConn.FieldByName("closeNotifySent")
+	if !rawCloseNotifySent.IsValid() || rawCloseNotifySent.Kind() != reflect.Bool {
+		return nil, E.New("badtls: invalid notify")
+	}
+	closeNotifySent := (*bool)(unsafe.Pointer(rawCloseNotifySent.UnsafeAddr()))
+	rawConfig := reflect.Indirect(rawConn.FieldByName("config"))
+	if !rawConfig.IsValid() || rawConfig.Kind() != reflect.Struct {
+		return nil, E.New("badtls: bad config")
+	}
+	config := (*tls.Config)(unsafe.Pointer(rawConfig.UnsafeAddr()))
+	randReader := config.Rand
+	if randReader == nil {
+		randReader = rand.Reader
+	}
+	rawHalfMutex := rawHalfConn.FieldByName("Mutex")
+	if !rawHalfMutex.IsValid() || rawHalfMutex.Kind() != reflect.Struct {
+		return nil, E.New("badtls: invalid half mutex")
+	}
+	halfAccess := (*sync.Mutex)(unsafe.Pointer(rawHalfMutex.UnsafeAddr()))
+	rawHalfError := rawHalfConn.FieldByName("err")
+	if !rawHalfError.IsValid() || rawHalfError.Kind() != reflect.Interface {
+		return nil, E.New("badtls: invalid half error")
+	}
+	halfError := (*error)(unsafe.Pointer(rawHalfError.UnsafeAddr()))
+	rawHalfCipherInterface := rawHalfConn.FieldByName("cipher")
+	if !rawHalfCipherInterface.IsValid() || rawHalfCipherInterface.Kind() != reflect.Interface {
+		return nil, E.New("badtls: invalid cipher interface")
+	}
+	rawHalfCipher := rawHalfCipherInterface.Elem()
+	aeadCipher, loaded := valueInterface(rawHalfCipher, false).(cipher.AEAD)
+	if !loaded {
+		return nil, E.New("badtls: invalid AEAD cipher")
+	}
+	var explicitNonceLen int
+	switch cipherName := reflect.Indirect(rawHalfCipher).Type().String(); cipherName {
+	case "tls.prefixNonceAEAD":
+		explicitNonceLen = aeadCipher.NonceSize()
+	case "tls.xorNonceAEAD":
+	default:
+		return nil, E.New("badtls: unknown cipher type: ", cipherName)
+	}
+	rawHalfSeq := rawHalfConn.FieldByName("seq")
+	if !rawHalfSeq.IsValid() || rawHalfSeq.Kind() != reflect.Array {
+		return nil, E.New("badtls: invalid seq")
+	}
+	halfSeq := rawHalfSeq.Bytes()
+	rawHalfScratchBuf := rawHalfConn.FieldByName("scratchBuf")
+	if !rawHalfScratchBuf.IsValid() || rawHalfScratchBuf.Kind() != reflect.Array {
+		return nil, E.New("badtls: invalid scratchBuf")
+	}
+	halfScratchBuf := rawHalfScratchBuf.Bytes()
+	return &Conn{
+		Conn:             conn,
+		writer:           bufio.NewExtendedWriter(conn.NetConn()),
+		activeCall:       activeCall,
+		closeNotifySent:  closeNotifySent,
+		version:          version,
+		halfAccess:       halfAccess,
+		halfError:        halfError,
+		cipher:           aeadCipher,
+		explicitNonceLen: explicitNonceLen,
+		rand:             randReader,
+		halfPtr:          rawHalfConn.UnsafeAddr(),
+		halfSeq:          halfSeq,
+		halfScratchBuf:   halfScratchBuf,
+	}, nil
+}
+
+func (c *Conn) WriteBuffer(buffer *buf.Buffer) error {
+	if buffer.Len() > maxPlaintext {
+		defer buffer.Release()
+		return common.Error(c.Write(buffer.Bytes()))
+	}
+	for {
+		x := atomic.LoadInt32(c.activeCall)
+		if x&1 != 0 {
+			return net.ErrClosed
+		}
+		if atomic.CompareAndSwapInt32(c.activeCall, x, x+2) {
+			break
+		}
+	}
+	defer atomic.AddInt32(c.activeCall, -2)
+	c.halfAccess.Lock()
+	defer c.halfAccess.Unlock()
+	if err := *c.halfError; err != nil {
+		return err
+	}
+	if *c.closeNotifySent {
+		return errShutdown
+	}
+	dataLen := buffer.Len()
+	dataBytes := buffer.Bytes()
+	outBuf := buffer.ExtendHeader(recordHeaderLen + c.explicitNonceLen)
+	outBuf[0] = 23
+	version := *c.version
+	if version == 0 {
+		version = tls.VersionTLS10
+	} else if version == tls.VersionTLS13 {
+		version = tls.VersionTLS12
+	}
+	binary.BigEndian.PutUint16(outBuf[1:], version)
+	var nonce []byte
+	if c.explicitNonceLen > 0 {
+		nonce = outBuf[5 : 5+c.explicitNonceLen]
+		if c.explicitNonceLen < 16 {
+			copy(nonce, c.halfSeq)
+		} else {
+			if _, err := io.ReadFull(c.rand, nonce); err != nil {
+				return err
+			}
+		}
+	}
+	if len(nonce) == 0 {
+		nonce = c.halfSeq
+	}
+	if *c.version == tls.VersionTLS13 {
+		buffer.FreeBytes()[0] = 23
+		binary.BigEndian.PutUint16(outBuf[3:], uint16(dataLen+1+c.cipher.Overhead()))
+		c.cipher.Seal(outBuf, nonce, outBuf[recordHeaderLen:recordHeaderLen+c.explicitNonceLen+dataLen+1], outBuf[:recordHeaderLen])
+		buffer.Extend(1 + c.cipher.Overhead())
+	} else {
+		binary.BigEndian.PutUint16(outBuf[3:], uint16(dataLen))
+		additionalData := append(c.halfScratchBuf[:0], c.halfSeq...)
+		additionalData = append(additionalData, outBuf[:recordHeaderLen]...)
+		c.cipher.Seal(outBuf, nonce, dataBytes, additionalData)
+		buffer.Extend(c.cipher.Overhead())
+		binary.BigEndian.PutUint16(outBuf[3:], uint16(dataLen+c.explicitNonceLen+c.cipher.Overhead()))
+	}
+	incSeq(c.halfPtr)
+	return c.writer.WriteBuffer(buffer)
+}
+
+func (c *Conn) FrontHeadroom() int {
+	return recordHeaderLen + c.explicitNonceLen
+}
+
+func (c *Conn) RearHeadroom() int {
+	return 1 + c.cipher.Overhead()
+}
+
+func (c *Conn) WriterMTU() int {
+	return maxPlaintext
+}
+
+func (c *Conn) Upstream() any {
+	return c.Conn
+}
+
+func (c *Conn) UpstreamWriter() any {
+	return c.NetConn()
+}

common/badtls/badtls_stub.go

@@ -0,0 +1,12 @@
+//go:build !go1.19 || go1.20
+
+package badtls
+
+import (
+	"crypto/tls"
+	"os"
+)
+
+func Create(conn *tls.Conn) (TLSConn, error) {
+	return nil, os.ErrInvalid
+}

common/badtls/conn.go

@@ -0,0 +1,13 @@
+package badtls
+
+import (
+	"context"
+	"crypto/tls"
+	"net"
+)
+
+type TLSConn interface {
+	net.Conn
+	HandshakeContext(ctx context.Context) error
+	ConnectionState() tls.ConnectionState
+}

common/badtls/link.go

@@ -0,0 +1,26 @@
+//go:build go1.19 && !go.1.20
+
+package badtls
+
+import (
+	"crypto/tls"
+	"reflect"
+	_ "unsafe"
+)
+
+const (
+	maxPlaintext    = 16384 // maximum plaintext payload length
+	recordHeaderLen = 5     // record header length
+)
+
+//go:linkname errShutdown crypto/tls.errShutdown
+var errShutdown error
+
+//go:linkname handshakeComplete crypto/tls.(*Conn).handshakeComplete
+func handshakeComplete(conn *tls.Conn) bool
+
+//go:linkname incSeq crypto/tls.(*halfConn).incSeq
+func incSeq(conn uintptr)
+
+//go:linkname valueInterface reflect.valueInterface
+func valueInterface(v reflect.Value, safe bool) any

common/badversion/version.go

@@ -0,0 +1,114 @@
+package badversion
+
+import (
+	"strconv"
+	"strings"
+
+	F "github.com/sagernet/sing/common/format"
+)
+
+type Version struct {
+	Major                int
+	Minor                int
+	Patch                int
+	PreReleaseIdentifier string
+	PreReleaseVersion    int
+}
+
+func (v Version) After(anotherVersion Version) bool {
+	if v.Major > anotherVersion.Major {
+		return true
+	} else if v.Major < anotherVersion.Major {
+		return false
+	}
+	if v.Minor > anotherVersion.Minor {
+		return true
+	} else if v.Minor < anotherVersion.Minor {
+		return false
+	}
+	if v.Patch > anotherVersion.Patch {
+		return true
+	} else if v.Patch < anotherVersion.Patch {
+		return false
+	}
+	if v.PreReleaseIdentifier == "" && anotherVersion.PreReleaseIdentifier != "" {
+		return true
+	} else if v.PreReleaseIdentifier != "" && anotherVersion.PreReleaseIdentifier == "" {
+		return false
+	}
+	if v.PreReleaseIdentifier != "" && anotherVersion.PreReleaseIdentifier != "" {
+		if v.PreReleaseIdentifier == "beta" && anotherVersion.PreReleaseIdentifier == "alpha" {
+			return true
+		} else if v.PreReleaseIdentifier == "alpha" && anotherVersion.PreReleaseIdentifier == "beta" {
+			return false
+		}
+		if v.PreReleaseVersion > anotherVersion.PreReleaseVersion {
+			return true
+		} else if v.PreReleaseVersion < anotherVersion.PreReleaseVersion {
+			return false
+		}
+	}
+	return false
+}
+
+func (v Version) String() string {
+	version := F.ToString(v.Major, ".", v.Minor, ".", v.Patch)
+	if v.PreReleaseIdentifier != "" {
+		version = F.ToString(version, "-", v.PreReleaseIdentifier, ".", v.PreReleaseVersion)
+	}
+	return version
+}
+
+func (v Version) BadString() string {
+	version := F.ToString(v.Major, ".", v.Minor)
+	if v.Patch > 0 {
+		version = F.ToString(version, ".", v.Patch)
+	}
+	if v.PreReleaseIdentifier != "" {
+		version = F.ToString(version, "-", v.PreReleaseIdentifier)
+		if v.PreReleaseVersion > 0 {
+			version = F.ToString(version, v.PreReleaseVersion)
+		}
+	}
+	return version
+}
+
+func Parse(versionName string) (version Version) {
+	if strings.HasPrefix(versionName, "v") {
+		versionName = versionName[1:]
+	}
+	if strings.Contains(versionName, "-") {
+		parts := strings.Split(versionName, "-")
+		versionName = parts[0]
+		identifier := parts[1]
+		if strings.Contains(identifier, ".") {
+			identifierParts := strings.Split(identifier, ".")
+			version.PreReleaseIdentifier = identifierParts[0]
+			if len(identifierParts) >= 2 {
+				version.PreReleaseVersion, _ = strconv.Atoi(identifierParts[1])
+			}
+		} else {
+			if strings.HasPrefix(identifier, "alpha") {
+				version.PreReleaseIdentifier = "alpha"
+				version.PreReleaseVersion, _ = strconv.Atoi(identifier[5:])
+			} else if strings.HasPrefix(identifier, "beta") {
+				version.PreReleaseIdentifier = "beta"
+				version.PreReleaseVersion, _ = strconv.Atoi(identifier[4:])
+			} else {
+				version.PreReleaseIdentifier = identifier
+			}
+		}
+	}
+	versionElements := strings.Split(versionName, ".")
+	versionLen := len(versionElements)
+	if versionLen >= 1 {
+		version.Major, _ = strconv.Atoi(versionElements[0])
+	}
+	if versionLen >= 2 {
+		version.Minor, _ = strconv.Atoi(versionElements[1])
+	}
+	if versionLen >= 3 {
+		version.Patch, _ = strconv.Atoi(versionElements[2])
+	}
+	return
+}

common/badversion/version_json.go

@@ -0,0 +1,17 @@
+package badversion
+
+import "github.com/sagernet/sing-box/common/json"
+
+func (v Version) MarshalJSON() ([]byte, error) {
+	return json.Marshal(v.String())
+}
+
+func (v *Version) UnmarshalJSON(data []byte) error {
+	var version string
+	err := json.Unmarshal(data, &version)
+	if err != nil {
+		return err
+	}
+	*v = Parse(version)
+	return nil
+}

common/badversion/version_test.go

@@ -0,0 +1,18 @@
+package badversion
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestCompareVersion(t *testing.T) {
+	t.Parallel()
+	require.Equal(t, "1.3.0-beta.1", Parse("v1.3.0-beta1").String())
+	require.Equal(t, "1.3-beta1", Parse("v1.3.0-beta.1").BadString())
+	require.True(t, Parse("1.3.0").After(Parse("1.3-beta1")))
+	require.True(t, Parse("1.3.0").After(Parse("1.3.0-beta1")))
+	require.True(t, Parse("1.3.0-beta1").After(Parse("1.3.0-alpha1")))
+	require.True(t, Parse("1.3.1").After(Parse("1.3.0")))
+	require.True(t, Parse("1.4").After(Parse("1.3")))
+}

common/canceler/instance.go

@@ -1,48 +0,0 @@
-package canceler
-
-import (
-	"context"
-	"time"
-)
-
-type Instance struct {
-	ctx        context.Context
-	cancelFunc context.CancelFunc
-	timer      *time.Timer
-	timeout    time.Duration
-}
-
-func New(ctx context.Context, cancelFunc context.CancelFunc, timeout time.Duration) *Instance {
-	instance := &Instance{
-		ctx,
-		cancelFunc,
-		time.NewTimer(timeout),
-		timeout,
-	}
-	go instance.wait()
-	return instance
-}
-
-func (i *Instance) Update() bool {
-	if !i.timer.Stop() {
-		return false
-	}
-	if !i.timer.Reset(i.timeout) {
-		return false
-	}
-	return true
-}
-
-func (i *Instance) wait() {
-	select {
-	case <-i.timer.C:
-	case <-i.ctx.Done():
-	}
-	i.Close()
-}
-
-func (i *Instance) Close() error {
-	i.timer.Stop()
-	i.cancelFunc()
-	return nil
-}

common/canceler/packet.go

@@ -1,49 +0,0 @@
-package canceler
-
-import (
-	"context"
-	"time"
-
-	"github.com/sagernet/sing/common"
-	"github.com/sagernet/sing/common/buf"
-	M "github.com/sagernet/sing/common/metadata"
-	N "github.com/sagernet/sing/common/network"
-)
-
-type PacketConn struct {
-	N.PacketConn
-	instance *Instance
-}
-
-func NewPacketConn(ctx context.Context, conn N.PacketConn, timeout time.Duration) (context.Context, N.PacketConn) {
-	ctx, cancel := context.WithCancel(ctx)
-	instance := New(ctx, cancel, timeout)
-	return ctx, &PacketConn{conn, instance}
-}
-
-func (c *PacketConn) ReadPacket(buffer *buf.Buffer) (destination M.Socksaddr, err error) {
-	destination, err = c.PacketConn.ReadPacket(buffer)
-	if err == nil {
-		c.instance.Update()
-	}
-	return
-}
-
-func (c *PacketConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
-	err := c.PacketConn.WritePacket(buffer, destination)
-	if err == nil {
-		c.instance.Update()
-	}
-	return err
-}
-
-func (c *PacketConn) Close() error {
-	return common.Close(
-		c.PacketConn,
-		c.instance,
-	)
-}
-
-func (c *PacketConn) Upstream() any {
-	return c.PacketConn
-}

common/dialer/conntrack/conn.go

@@ -0,0 +1,54 @@
+package conntrack
+
+import (
+	"io"
+	"net"
+
+	"github.com/sagernet/sing/common/x/list"
+)
+
+type Conn struct {
+	net.Conn
+	element *list.Element[io.Closer]
+}
+
+func NewConn(conn net.Conn) (net.Conn, error) {
+	connAccess.Lock()
+	element := openConnection.PushBack(conn)
+	connAccess.Unlock()
+	if KillerEnabled {
+		err := killerCheck()
+		if err != nil {
+			conn.Close()
+			return nil, err
+		}
+	}
+	return &Conn{
+		Conn:    conn,
+		element: element,
+	}, nil
+}
+
+func (c *Conn) Close() error {
+	if c.element.Value != nil {
+		connAccess.Lock()
+		if c.element.Value != nil {
+			openConnection.Remove(c.element)
+			c.element.Value = nil
+		}
+		connAccess.Unlock()
+	}
+	return c.Conn.Close()
+}
+
+func (c *Conn) Upstream() any {
+	return c.Conn
+}
+
+func (c *Conn) ReaderReplaceable() bool {
+	return true
+}
+
+func (c *Conn) WriterReplaceable() bool {
+	return true
+}

common/dialer/conntrack/killer.go

@@ -0,0 +1,38 @@
+package conntrack
+
+import (
+	"runtime"
+	runtimeDebug "runtime/debug"
+	"time"
+
+	E "github.com/sagernet/sing/common/exceptions"
+)
+
+var (
+	KillerEnabled   bool
+	MemoryLimit     int64
+	killerLastCheck time.Time
+)
+
+func killerCheck() error {
+	if !KillerEnabled {
+		return nil
+	}
+	nowTime := time.Now()
+	if nowTime.Sub(killerLastCheck) < 3*time.Second {
+		return nil
+	}
+	killerLastCheck = nowTime
+	var memStats runtime.MemStats
+	runtime.ReadMemStats(&memStats)
+	inuseMemory := int64(memStats.StackInuse + memStats.HeapInuse + memStats.HeapIdle - memStats.HeapReleased)
+	if inuseMemory > MemoryLimit {
+		Close()
+		go func() {
+			time.Sleep(time.Second)
+			runtimeDebug.FreeOSMemory()
+		}()
+		return E.New("out of memory")
+	}
+	return nil
+}

common/dialer/conntrack/packet_conn.go

@@ -0,0 +1,54 @@
+package conntrack
+
+import (
+	"io"
+	"net"
+
+	"github.com/sagernet/sing/common/x/list"
+)
+
+type PacketConn struct {
+	net.PacketConn
+	element *list.Element[io.Closer]
+}
+
+func NewPacketConn(conn net.PacketConn) (net.PacketConn, error) {
+	connAccess.Lock()
+	element := openConnection.PushBack(conn)
+	connAccess.Unlock()
+	if KillerEnabled {
+		err := killerCheck()
+		if err != nil {
+			conn.Close()
+			return nil, err
+		}
+	}
+	return &PacketConn{
+		PacketConn: conn,
+		element:    element,
+	}, nil
+}
+
+func (c *PacketConn) Close() error {
+	if c.element.Value != nil {
+		connAccess.Lock()
+		if c.element.Value != nil {
+			openConnection.Remove(c.element)
+			c.element.Value = nil
+		}
+		connAccess.Unlock()
+	}
+	return c.PacketConn.Close()
+}
+
+func (c *PacketConn) Upstream() any {
+	return c.PacketConn
+}
+
+func (c *PacketConn) ReaderReplaceable() bool {
+	return true
+}
+
+func (c *PacketConn) WriterReplaceable() bool {
+	return true
+}

common/dialer/conntrack/track.go

@@ -0,0 +1,47 @@
+package conntrack
+
+import (
+	"io"
+	"sync"
+
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/x/list"
+)
+
+var (
+	connAccess     sync.RWMutex
+	openConnection list.List[io.Closer]
+)
+
+func Count() int {
+	if !Enabled {
+		return 0
+	}
+	return openConnection.Len()
+}
+
+func List() []io.Closer {
+	if !Enabled {
+		return nil
+	}
+	connAccess.RLock()
+	defer connAccess.RUnlock()
+	connList := make([]io.Closer, 0, openConnection.Len())
+	for element := openConnection.Front(); element != nil; element = element.Next() {
+		connList = append(connList, element.Value)
+	}
+	return connList
+}
+
+func Close() {
+	if !Enabled {
+		return
+	}
+	connAccess.Lock()
+	defer connAccess.Unlock()
+	for element := openConnection.Front(); element != nil; element = element.Next() {
+		common.Close(element.Value)
+		element.Value = nil
+	}
+	openConnection.Init()
+}

common/dialer/conntrack/track_disable.go

@@ -0,0 +1,5 @@
+//go:build !with_conntrack
+
+package conntrack
+
+const Enabled = false

common/dialer/conntrack/track_enable.go

@@ -0,0 +1,5 @@
+//go:build with_conntrack
+
+package conntrack
+
+const Enabled = true

common/dialer/default.go

@@ -3,10 +3,10 @@ package dialer
 import (
 	"context"
 	"net"
-	"net/netip"
 	"time"
 
 	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/common/dialer/conntrack"
 	"github.com/sagernet/sing-box/common/warning"
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/option"
@@ -14,8 +14,7 @@ import (
 	E "github.com/sagernet/sing/common/exceptions"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
-
-	"github.com/database64128/tfo-go"
+	"github.com/sagernet/tfo-go"
 )
 
 var warnBindInterfaceOnUnsupportedPlatform = warning.New(
@@ -54,10 +53,13 @@ var warnTFOOnUnsupportedPlatform = warning.New(
 )
 
 type DefaultDialer struct {
-	dialer      tfo.Dialer
-	udpDialer   net.Dialer
+	dialer4     tfo.Dialer
+	dialer6     tfo.Dialer
+	udpDialer4  net.Dialer
+	udpDialer6  net.Dialer
 	udpListener net.ListenConfig
-	bindUDPAddr string
+	udpAddr4    string
+	udpAddr6    string
 }
 
 func NewDefault(router adapter.Router, options option.DialerOptions) *DefaultDialer {
@@ -65,25 +67,15 @@ func NewDefault(router adapter.Router, options option.DialerOptions) *DefaultDia
 	var listener net.ListenConfig
 	if options.BindInterface != "" {
 		warnBindInterfaceOnUnsupportedPlatform.Check()
-		bindFunc := control.BindToInterface(router.InterfaceBindManager(), options.BindInterface)
+		bindFunc := control.BindToInterface(router.InterfaceFinder(), options.BindInterface, -1)
 		dialer.Control = control.Append(dialer.Control, bindFunc)
 		listener.Control = control.Append(listener.Control, bindFunc)
 	} else if router.AutoDetectInterface() {
-		if C.IsWindows {
-			bindFunc := control.BindToInterfaceIndexFunc(func(network, address string) int {
-				return router.InterfaceMonitor().DefaultInterfaceIndex(M.ParseSocksaddr(address).Addr)
-			})
-			dialer.Control = control.Append(dialer.Control, bindFunc)
-			listener.Control = control.Append(listener.Control, bindFunc)
-		} else {
-			bindFunc := control.BindToInterfaceFunc(router.InterfaceBindManager(), func(network, address string) string {
-				return router.InterfaceMonitor().DefaultInterfaceName(M.ParseSocksaddr(address).Addr)
-			})
-			dialer.Control = control.Append(dialer.Control, bindFunc)
-			listener.Control = control.Append(listener.Control, bindFunc)
-		}
+		bindFunc := router.AutoDetectInterfaceFunc()
+		dialer.Control = control.Append(dialer.Control, bindFunc)
+		listener.Control = control.Append(listener.Control, bindFunc)
 	} else if router.DefaultInterface() != "" {
-		bindFunc := control.BindToInterface(router.InterfaceBindManager(), router.DefaultInterface())
+		bindFunc := control.BindToInterface(router.InterfaceFinder(), router.DefaultInterface(), -1)
 		dialer.Control = control.Append(dialer.Control, bindFunc)
 		listener.Control = control.Append(listener.Control, bindFunc)
 	}
@@ -112,26 +104,47 @@ func NewDefault(router adapter.Router, options option.DialerOptions) *DefaultDia
 	if options.TCPFastOpen {
 		warnTFOOnUnsupportedPlatform.Check()
 	}
-	if !options.UDPFragment {
+	var udpFragment bool
+	if options.UDPFragment != nil {
+		udpFragment = *options.UDPFragment
+	} else {
+		udpFragment = options.UDPFragmentDefault
+	}
+	if !udpFragment {
 		dialer.Control = control.Append(dialer.Control, control.DisableUDPFragment())
 		listener.Control = control.Append(listener.Control, control.DisableUDPFragment())
 	}
-	var bindUDPAddr string
-	udpDialer := dialer
-	var bindAddress netip.Addr
-	if options.BindAddress != nil {
-		bindAddress = options.BindAddress.Build()
+	var (
+		dialer4    = dialer
+		udpDialer4 = dialer
+		udpAddr4   string
+	)
+	if options.Inet4BindAddress != nil {
+		bindAddr := options.Inet4BindAddress.Build()
+		dialer4.LocalAddr = &net.TCPAddr{IP: bindAddr.AsSlice()}
+		udpDialer4.LocalAddr = &net.UDPAddr{IP: bindAddr.AsSlice()}
+		udpAddr4 = M.SocksaddrFrom(bindAddr, 0).String()
 	}
-	if bindAddress.IsValid() {
-		dialer.LocalAddr = &net.TCPAddr{
-			IP: bindAddress.AsSlice(),
-		}
-		udpDialer.LocalAddr = &net.UDPAddr{
-			IP: bindAddress.AsSlice(),
-		}
-		bindUDPAddr = M.SocksaddrFrom(bindAddress, 0).String()
+	var (
+		dialer6    = dialer
+		udpDialer6 = dialer
+		udpAddr6   string
+	)
+	if options.Inet6BindAddress != nil {
+		bindAddr := options.Inet6BindAddress.Build()
+		dialer6.LocalAddr = &net.TCPAddr{IP: bindAddr.AsSlice()}
+		udpDialer6.LocalAddr = &net.UDPAddr{IP: bindAddr.AsSlice()}
+		udpAddr6 = M.SocksaddrFrom(bindAddr, 0).String()
+	}
+	return &DefaultDialer{
+		tfo.Dialer{Dialer: dialer4, DisableTFO: !options.TCPFastOpen},
+		tfo.Dialer{Dialer: dialer6, DisableTFO: !options.TCPFastOpen},
+		udpDialer4,
+		udpDialer6,
+		listener,
+		udpAddr4,
+		udpAddr6,
 	}
-	return &DefaultDialer{tfo.Dialer{Dialer: dialer, DisableTFO: !options.TCPFastOpen}, udpDialer, listener, bindUDPAddr}
 }
 
 func (d *DefaultDialer) DialContext(ctx context.Context, network string, address M.Socksaddr) (net.Conn, error) {
@@ -140,11 +153,37 @@ func (d *DefaultDialer) DialContext(ctx context.Context, network string, address
 	}
 	switch N.NetworkName(network) {
 	case N.NetworkUDP:
-		return d.udpDialer.DialContext(ctx, network, address.String())
+		if !address.IsIPv6() {
+			return trackConn(d.udpDialer4.DialContext(ctx, network, address.String()))
+		} else {
+			return trackConn(d.udpDialer6.DialContext(ctx, network, address.String()))
+		}
+	}
+	if !address.IsIPv6() {
+		return trackConn(DialSlowContext(&d.dialer4, ctx, network, address))
+	} else {
+		return trackConn(DialSlowContext(&d.dialer6, ctx, network, address))
 	}
-	return d.dialer.DialContext(ctx, network, address.Unwrap().String())
 }
 
 func (d *DefaultDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
-	return d.udpListener.ListenPacket(ctx, N.NetworkUDP, d.bindUDPAddr)
+	if !destination.IsIPv6() {
+		return trackPacketConn(d.udpListener.ListenPacket(ctx, N.NetworkUDP, d.udpAddr4))
+	} else {
+		return trackPacketConn(d.udpListener.ListenPacket(ctx, N.NetworkUDP, d.udpAddr6))
+	}
+}
+
+func trackConn(conn net.Conn, err error) (net.Conn, error) {
+	if !conntrack.Enabled || err != nil {
+		return conn, err
+	}
+	return conntrack.NewConn(conn)
+}
+
+func trackPacketConn(conn net.PacketConn, err error) (net.PacketConn, error) {
+	if !conntrack.Enabled || err != nil {
+		return conn, err
+	}
+	return conntrack.NewPacketConn(conn)
 }

common/dialer/resolve.go

@@ -9,6 +9,7 @@ import (
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-dns"
+	"github.com/sagernet/sing/common/bufio"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
 )
@@ -68,11 +69,11 @@ func (d *ResolveDialer) ListenPacket(ctx context.Context, destination M.Socksadd
 	if err != nil {
 		return nil, err
 	}
-	conn, err := N.ListenSerial(ctx, d.dialer, destination, addresses)
+	conn, destinationAddress, err := N.ListenSerial(ctx, d.dialer, destination, addresses)
 	if err != nil {
 		return nil, err
 	}
-	return NewResolvePacketConn(ctx, d.router, d.strategy, conn), nil
+	return bufio.NewNATPacketConn(bufio.NewPacketConn(conn), M.SocksaddrFrom(destinationAddress, destination.Port), destination), nil
 }
 
 func (d *ResolveDialer) Upstream() any {

common/dialer/resolve_conn.go

@@ -1,84 +0,0 @@
-package dialer
-
-import (
-	"context"
-	"net"
-
-	"github.com/sagernet/sing-box/adapter"
-	"github.com/sagernet/sing-dns"
-	"github.com/sagernet/sing/common"
-	"github.com/sagernet/sing/common/buf"
-	M "github.com/sagernet/sing/common/metadata"
-	N "github.com/sagernet/sing/common/network"
-)
-
-func NewResolvePacketConn(ctx context.Context, router adapter.Router, strategy dns.DomainStrategy, conn net.PacketConn) N.NetPacketConn {
-	if udpConn, ok := conn.(*net.UDPConn); ok {
-		return &ResolveUDPConn{udpConn, ctx, router, strategy}
-	} else {
-		return &ResolvePacketConn{conn, ctx, router, strategy}
-	}
-}
-
-type ResolveUDPConn struct {
-	*net.UDPConn
-	ctx      context.Context
-	router   adapter.Router
-	strategy dns.DomainStrategy
-}
-
-func (w *ResolveUDPConn) ReadPacket(buffer *buf.Buffer) (M.Socksaddr, error) {
-	n, addr, err := w.ReadFromUDPAddrPort(buffer.FreeBytes())
-	if err != nil {
-		return M.Socksaddr{}, err
-	}
-	buffer.Truncate(n)
-	return M.SocksaddrFromNetIP(addr), nil
-}
-
-func (w *ResolveUDPConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
-	defer buffer.Release()
-	if destination.IsFqdn() {
-		addresses, err := w.router.Lookup(w.ctx, destination.Fqdn, w.strategy)
-		if err != nil {
-			return err
-		}
-		return common.Error(w.UDPConn.WriteToUDPAddrPort(buffer.Bytes(), M.SocksaddrFrom(addresses[0], destination.Port).AddrPort()))
-	}
-	return common.Error(w.UDPConn.WriteToUDPAddrPort(buffer.Bytes(), destination.AddrPort()))
-}
-
-func (w *ResolveUDPConn) Upstream() any {
-	return w.UDPConn
-}
-
-type ResolvePacketConn struct {
-	net.PacketConn
-	ctx      context.Context
-	router   adapter.Router
-	strategy dns.DomainStrategy
-}
-
-func (w *ResolvePacketConn) ReadPacket(buffer *buf.Buffer) (M.Socksaddr, error) {
-	_, addr, err := buffer.ReadPacketFrom(w)
-	if err != nil {
-		return M.Socksaddr{}, err
-	}
-	return M.SocksaddrFromNet(addr), err
-}
-
-func (w *ResolvePacketConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
-	defer buffer.Release()
-	if destination.IsFqdn() {
-		addresses, err := w.router.Lookup(w.ctx, destination.Fqdn, w.strategy)
-		if err != nil {
-			return err
-		}
-		return common.Error(w.WriteTo(buffer.Bytes(), M.SocksaddrFrom(addresses[0], destination.Port).UDPAddr()))
-	}
-	return common.Error(w.WriteTo(buffer.Bytes(), destination.UDPAddr()))
-}
-
-func (w *ResolvePacketConn) Upstream() any {
-	return w.PacketConn
-}

common/dialer/tfo.go

@@ -0,0 +1,150 @@
+package dialer
+
+import (
+	"context"
+	"io"
+	"net"
+	"os"
+	"time"
+
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/bufio"
+	E "github.com/sagernet/sing/common/exceptions"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/sagernet/tfo-go"
+)
+
+type slowOpenConn struct {
+	dialer      *tfo.Dialer
+	ctx         context.Context
+	network     string
+	destination M.Socksaddr
+	conn        net.Conn
+	create      chan struct{}
+	err         error
+}
+
+func DialSlowContext(dialer *tfo.Dialer, ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
+	if dialer.DisableTFO || N.NetworkName(network) != N.NetworkTCP {
+		switch N.NetworkName(network) {
+		case N.NetworkTCP, N.NetworkUDP:
+			return dialer.Dialer.DialContext(ctx, network, destination.String())
+		default:
+			return dialer.Dialer.DialContext(ctx, network, destination.AddrString())
+		}
+	}
+	return &slowOpenConn{
+		dialer:      dialer,
+		ctx:         ctx,
+		network:     network,
+		destination: destination,
+		create:      make(chan struct{}),
+	}, nil
+}
+
+func (c *slowOpenConn) Read(b []byte) (n int, err error) {
+	if c.conn == nil {
+		select {
+		case <-c.create:
+			if c.err != nil {
+				return 0, c.err
+			}
+		case <-c.ctx.Done():
+			return 0, c.ctx.Err()
+		}
+	}
+	return c.conn.Read(b)
+}
+
+func (c *slowOpenConn) Write(b []byte) (n int, err error) {
+	if c.conn == nil {
+		c.conn, err = c.dialer.DialContext(c.ctx, c.network, c.destination.String(), b)
+		if err != nil {
+			c.err = E.Cause(err, "dial tcp fast open")
+		}
+		close(c.create)
+		return
+	}
+	return c.conn.Write(b)
+}
+
+func (c *slowOpenConn) Close() error {
+	return common.Close(c.conn)
+}
+
+func (c *slowOpenConn) LocalAddr() net.Addr {
+	if c.conn == nil {
+		return M.Socksaddr{}
+	}
+	return c.conn.LocalAddr()
+}
+
+func (c *slowOpenConn) RemoteAddr() net.Addr {
+	if c.conn == nil {
+		return M.Socksaddr{}
+	}
+	return c.conn.RemoteAddr()
+}
+
+func (c *slowOpenConn) SetDeadline(t time.Time) error {
+	if c.conn == nil {
+		return os.ErrInvalid
+	}
+	return c.conn.SetDeadline(t)
+}
+
+func (c *slowOpenConn) SetReadDeadline(t time.Time) error {
+	if c.conn == nil {
+		return os.ErrInvalid
+	}
+	return c.conn.SetReadDeadline(t)
+}
+
+func (c *slowOpenConn) SetWriteDeadline(t time.Time) error {
+	if c.conn == nil {
+		return os.ErrInvalid
+	}
+	return c.conn.SetWriteDeadline(t)
+}
+
+func (c *slowOpenConn) Upstream() any {
+	return c.conn
+}
+
+func (c *slowOpenConn) ReaderReplaceable() bool {
+	return c.conn != nil
+}
+
+func (c *slowOpenConn) WriterReplaceable() bool {
+	return c.conn != nil
+}
+
+func (c *slowOpenConn) LazyHeadroom() bool {
+	return c.conn == nil
+}
+
+func (c *slowOpenConn) NeedHandshake() bool {
+	return c.conn == nil
+}
+
+func (c *slowOpenConn) ReadFrom(r io.Reader) (n int64, err error) {
+	if c.conn != nil {
+		return bufio.Copy(c.conn, r)
+	}
+	return bufio.ReadFrom0(c, r)
+}
+
+func (c *slowOpenConn) WriteTo(w io.Writer) (n int64, err error) {
+	if c.conn == nil {
+		select {
+		case <-c.create:
+			if c.err != nil {
+				return 0, c.err
+			}
+		case <-c.ctx.Done():
+			return 0, c.ctx.Err()
+		}
+	}
+	return bufio.Copy(w, c.conn)
+}

common/geoip/reader.go

@@ -4,7 +4,6 @@ import (
 	"net/netip"
 
 	E "github.com/sagernet/sing/common/exceptions"
-	N "github.com/sagernet/sing/common/network"
 
 	"github.com/oschwald/maxminddb-golang"
 )
@@ -31,8 +30,5 @@ func (r *Reader) Lookup(addr netip.Addr) string {
 	if code != "" {
 		return code
 	}
-	if !N.IsPublicAddr(addr) {
-		return "private"
-	}
 	return "unknown"
 }

common/mux/client.go

@@ -11,6 +11,7 @@ import (
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/buf"
 	"github.com/sagernet/sing/common/bufio"
+	"github.com/sagernet/sing/common/bufio/deadline"
 	E "github.com/sagernet/sing/common/exceptions"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
@@ -68,7 +69,7 @@ func (c *Client) DialContext(ctx context.Context, network string, destination M.
 		if err != nil {
 			return nil, err
 		}
-		return bufio.NewUnbindPacketConn(&ClientPacketConn{ExtendedConn: bufio.NewExtendedConn(stream), destination: destination}), nil
+		return bufio.NewBindPacketConn(deadline.NewPacketConn(bufio.NewNetPacketConn(&ClientPacketConn{ExtendedConn: bufio.NewExtendedConn(stream), destination: destination})), destination), nil
 	default:
 		return nil, E.Extend(N.ErrUnknownNetwork, network)
 	}
@@ -79,7 +80,7 @@ func (c *Client) ListenPacket(ctx context.Context, destination M.Socksaddr) (net
 	if err != nil {
 		return nil, err
 	}
-	return &ClientPacketAddrConn{ExtendedConn: bufio.NewExtendedConn(stream), destination: destination}, nil
+	return deadline.NewPacketConn(&ClientPacketAddrConn{ExtendedConn: bufio.NewExtendedConn(stream), destination: destination}), nil
 }
 
 func (c *Client) openStream() (net.Conn, error) {
@@ -329,6 +330,23 @@ func (c *ClientPacketConn) Write(b []byte) (n int, err error) {
 	return c.ExtendedConn.Write(b)
 }
 
+func (c *ClientPacketConn) ReadBuffer(buffer *buf.Buffer) (err error) {
+	if !c.responseRead {
+		err = c.readResponse()
+		if err != nil {
+			return
+		}
+		c.responseRead = true
+	}
+	var length uint16
+	err = binary.Read(c.ExtendedConn, binary.BigEndian, &length)
+	if err != nil {
+		return
+	}
+	_, err = buffer.ReadFullFrom(c.ExtendedConn, int(length))
+	return
+}
+
 func (c *ClientPacketConn) WriteBuffer(buffer *buf.Buffer) error {
 	if !c.requestWrite {
 		defer buffer.Release()
@@ -343,6 +361,11 @@ func (c *ClientPacketConn) FrontHeadroom() int {
 	return 2
 }
 
+func (c *ClientPacketConn) ReadPacket(buffer *buf.Buffer) (destination M.Socksaddr, err error) {
+	err = c.ReadBuffer(buffer)
+	return
+}
+
 func (c *ClientPacketConn) WritePacket(buffer *buf.Buffer, destination M.Socksaddr) error {
 	return c.WriteBuffer(buffer)
 }
@@ -391,7 +414,11 @@ func (c *ClientPacketAddrConn) ReadFrom(p []byte) (n int, addr net.Addr, err err
 	if err != nil {
 		return
 	}
-	addr = destination.UDPAddr()
+	if destination.IsFqdn() {
+		addr = destination
+	} else {
+		addr = destination.UDPAddr()
+	}
 	var length uint16
 	err = binary.Read(c.ExtendedConn, binary.BigEndian, &length)
 	if err != nil {
@@ -466,10 +493,7 @@ func (c *ClientPacketAddrConn) ReadPacket(buffer *buf.Buffer) (destination M.Soc
 	if err != nil {
 		return
 	}
-	if buffer.FreeLen() < int(length) {
-		return destination, io.ErrShortBuffer
-	}
-	_, err = io.ReadFull(c.ExtendedConn, buffer.Extend(int(length)))
+	_, err = buffer.ReadFullFrom(c.ExtendedConn, int(length))
 	return
 }
 

common/mux/protocol.go

@@ -43,7 +43,7 @@ func ParseProtocol(name string) (Protocol, error) {
 func (p Protocol) newServer(conn net.Conn) (abstractSession, error) {
 	switch p {
 	case ProtocolSMux:
-		session, err := smux.Server(conn, nil)
+		session, err := smux.Server(conn, smuxConfig())
 		if err != nil {
 			return nil, err
 		}
@@ -58,7 +58,7 @@ func (p Protocol) newServer(conn net.Conn) (abstractSession, error) {
 func (p Protocol) newClient(conn net.Conn) (abstractSession, error) {
 	switch p {
 	case ProtocolSMux:
-		session, err := smux.Client(conn, nil)
+		session, err := smux.Client(conn, smuxConfig())
 		if err != nil {
 			return nil, err
 		}
@@ -70,6 +70,12 @@ func (p Protocol) newClient(conn net.Conn) (abstractSession, error) {
 	}
 }
 
+func smuxConfig() *smux.Config {
+	config := smux.DefaultConfig()
+	config.KeepAliveDisabled = true
+	return config
+}
+
 func yaMuxConfig() *yamux.Config {
 	config := yamux.DefaultConfig()
 	config.LogOutput = io.Discard

common/mux/service.go

@@ -3,7 +3,6 @@ package mux
 import (
 	"context"
 	"encoding/binary"
-	"io"
 	"net"
 
 	"github.com/sagernet/sing-box/adapter"
@@ -11,10 +10,12 @@ import (
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/buf"
 	"github.com/sagernet/sing/common/bufio"
+	"github.com/sagernet/sing/common/bufio/deadline"
 	E "github.com/sagernet/sing/common/exceptions"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
 	"github.com/sagernet/sing/common/rw"
+	"github.com/sagernet/sing/common/task"
 )
 
 func NewConnection(ctx context.Context, router adapter.Router, errorHandler E.Handler, logger log.ContextLogger, conn net.Conn, metadata adapter.InboundContext) error {
@@ -26,14 +27,21 @@ func NewConnection(ctx context.Context, router adapter.Router, errorHandler E.Ha
 	if err != nil {
 		return err
 	}
-	var stream net.Conn
-	for {
-		stream, err = session.Accept()
-		if err != nil {
-			return err
+	var group task.Group
+	group.Append0(func(ctx context.Context) error {
+		var stream net.Conn
+		for {
+			stream, err = session.Accept()
+			if err != nil {
+				return err
+			}
+			go newConnection(ctx, router, errorHandler, logger, stream, metadata)
 		}
-		go newConnection(ctx, router, errorHandler, logger, stream, metadata)
-	}
+	})
+	group.Cleanup(func() {
+		session.Close()
+	})
+	return group.Run(ctx)
 }
 
 func newConnection(ctx context.Context, router adapter.Router, errorHandler E.Handler, logger log.ContextLogger, stream net.Conn, metadata adapter.InboundContext) {
@@ -60,7 +68,7 @@ func newConnection(ctx context.Context, router adapter.Router, errorHandler E.Ha
 			logger.InfoContext(ctx, "inbound multiplex packet connection")
 			packetConn = &ServerPacketAddrConn{ExtendedConn: bufio.NewExtendedConn(stream)}
 		}
-		hErr := router.RoutePacketConnection(ctx, packetConn, metadata)
+		hErr := router.RoutePacketConnection(ctx, deadline.NewPacketConn(bufio.NewNetPacketConn(packetConn)), metadata)
 		stream.Close()
 		if hErr != nil {
 			errorHandler.NewError(ctx, hErr)
@@ -158,9 +166,6 @@ func (c *ServerPacketConn) ReadPacket(buffer *buf.Buffer) (destination M.Socksad
 	if err != nil {
 		return
 	}
-	if buffer.FreeLen() < int(length) {
-		return destination, io.ErrShortBuffer
-	}
 	_, err = buffer.ReadFullFrom(c.ExtendedConn, int(length))
 	if err != nil {
 		return
@@ -223,9 +228,6 @@ func (c *ServerPacketAddrConn) ReadPacket(buffer *buf.Buffer) (destination M.Soc
 	if err != nil {
 		return
 	}
-	if buffer.FreeLen() < int(length) {
-		return destination, io.ErrShortBuffer
-	}
 	_, err = buffer.ReadFullFrom(c.ExtendedConn, int(length))
 	if err != nil {
 		return

common/process/searcher.go

@@ -3,10 +3,12 @@ package process
 import (
 	"context"
 	"net/netip"
+	"os/user"
 
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-tun"
 	E "github.com/sagernet/sing/common/exceptions"
+	F "github.com/sagernet/sing/common/format"
 )
 
 type Searcher interface {
@@ -28,11 +30,15 @@ type Info struct {
 }
 
 func FindProcessInfo(searcher Searcher, ctx context.Context, network string, source netip.AddrPort, destination netip.AddrPort) (*Info, error) {
-	info, err := findProcessInfo(searcher, ctx, network, source, destination)
+	info, err := searcher.FindProcessInfo(ctx, network, source, destination)
 	if err != nil {
-		if source.Addr().Is4In6() {
-			info, err = findProcessInfo(searcher, ctx, network, netip.AddrPortFrom(netip.AddrFrom4(source.Addr().As4()), source.Port()), destination)
+		return nil, err
+	}
+	if info.UserId != -1 {
+		osUser, _ := user.LookupId(F.ToString(info.UserId))
+		if osUser != nil {
+			info.User = osUser.Username
 		}
 	}
-	return info, err
+	return info, nil
 }

common/process/searcher_darwin.go

@@ -5,6 +5,8 @@ import (
 	"encoding/binary"
 	"net/netip"
 	"os"
+	"strconv"
+	"strings"
 	"syscall"
 	"unsafe"
 
@@ -29,6 +31,22 @@ func (d *darwinSearcher) FindProcessInfo(ctx context.Context, network string, so
 	return &Info{ProcessPath: processName, UserId: -1}, nil
 }
 
+var structSize = func() int {
+	value, _ := syscall.Sysctl("kern.osrelease")
+	major, _, _ := strings.Cut(value, ".")
+	n, _ := strconv.ParseInt(major, 10, 64)
+	switch true {
+	case n >= 22:
+		return 408
+	default:
+		// from darwin-xnu/bsd/netinet/in_pcblist.c:get_pcblist_n
+		// size/offset are round up (aligned) to 8 bytes in darwin
+		// rup8(sizeof(xinpcb_n)) + rup8(sizeof(xsocket_n)) +
+		// 2 * rup8(sizeof(xsockbuf_n)) + rup8(sizeof(xsockstat_n))
+		return 384
+	}
+}()
+
 func findProcessName(network string, ip netip.Addr, port int) (string, error) {
 	var spath string
 	switch network {
@@ -53,7 +71,7 @@ func findProcessName(network string, ip netip.Addr, port int) (string, error) {
 	// size/offset are round up (aligned) to 8 bytes in darwin
 	// rup8(sizeof(xinpcb_n)) + rup8(sizeof(xsocket_n)) +
 	// 2 * rup8(sizeof(xsockbuf_n)) + rup8(sizeof(xsockstat_n))
-	itemSize := 384
+	itemSize := structSize
 	if network == N.NetworkTCP {
 		// rup8(sizeof(xtcpcb_n))
 		itemSize += 208

common/process/searcher_with_name.go

@@ -1,25 +0,0 @@
-//go:build linux && !android
-
-package process
-
-import (
-	"context"
-	"net/netip"
-	"os/user"
-
-	F "github.com/sagernet/sing/common/format"
-)
-
-func findProcessInfo(searcher Searcher, ctx context.Context, network string, source netip.AddrPort, destination netip.AddrPort) (*Info, error) {
-	info, err := searcher.FindProcessInfo(ctx, network, source, destination)
-	if err != nil {
-		return nil, err
-	}
-	if info.UserId != -1 {
-		osUser, _ := user.LookupId(F.ToString(info.UserId))
-		if osUser != nil {
-			info.User = osUser.Username
-		}
-	}
-	return info, nil
-}

common/process/searcher_without_name.go

@@ -1,12 +0,0 @@
-//go:build !linux || android
-
-package process
-
-import (
-	"context"
-	"net/netip"
-)
-
-func findProcessInfo(searcher Searcher, ctx context.Context, network string, source netip.AddrPort, destination netip.AddrPort) (*Info, error) {
-	return searcher.FindProcessInfo(ctx, network, source, destination)
-}

common/proxyproto/listener.go

@@ -24,21 +24,39 @@ func (l *Listener) Accept() (net.Conn, error) {
 	bufReader := std_bufio.NewReader(conn)
 	header, err := proxyproto.Read(bufReader)
 	if err != nil && !(l.AcceptNoHeader && err == proxyproto.ErrNoProxyProtocol) {
-		return nil, err
+		return nil, &Error{err}
 	}
 	if bufReader.Buffered() > 0 {
 		cache := buf.NewSize(bufReader.Buffered())
 		_, err = cache.ReadFullFrom(bufReader, cache.FreeLen())
 		if err != nil {
-			return nil, err
+			return nil, &Error{err}
 		}
 		conn = bufio.NewCachedConn(conn, cache)
 	}
 	if header != nil {
 		return &bufio.AddrConn{Conn: conn, Metadata: M.Metadata{
-			Source:      M.SocksaddrFromNet(header.SourceAddr),
-			Destination: M.SocksaddrFromNet(header.DestinationAddr),
+			Source:      M.SocksaddrFromNet(header.SourceAddr).Unwrap(),
+			Destination: M.SocksaddrFromNet(header.DestinationAddr).Unwrap(),
 		}}, nil
 	}
 	return conn, nil
 }
+
+var _ net.Error = (*Error)(nil)
+
+type Error struct {
+	error
+}
+
+func (e *Error) Unwrap() error {
+	return e.error
+}
+
+func (e *Error) Timeout() bool {
+	return false
+}
+
+func (e *Error) Temporary() bool {
+	return true
+}

common/redir/redir_linux.go

@@ -1,6 +1,7 @@
 package redir
 
 import (
+	"encoding/binary"
 	"net"
 	"net/netip"
 	"os"
@@ -29,7 +30,9 @@ func GetOriginalDestination(conn net.Conn) (destination netip.AddrPort, err erro
 			if err != nil {
 				return err
 			}
-			destination = netip.AddrPortFrom(M.AddrFromIP(raw.Addr.Addr[:]), raw.Addr.Port)
+			var port [2]byte
+			binary.BigEndian.PutUint16(port[:], raw.Addr.Port)
+			destination = netip.AddrPortFrom(M.AddrFromIP(raw.Addr.Addr[:]), binary.LittleEndian.Uint16(port[:]))
 		}
 		return nil
 	})

common/redir/tproxy_linux.go

@@ -2,14 +2,11 @@ package redir
 
 import (
 	"encoding/binary"
-	"net"
 	"net/netip"
-	"os"
-	"strconv"
 	"syscall"
 
+	"github.com/sagernet/sing/common/control"
 	E "github.com/sagernet/sing/common/exceptions"
-	F "github.com/sagernet/sing/common/format"
 	M "github.com/sagernet/sing/common/metadata"
 
 	"golang.org/x/sys/unix"
@@ -32,6 +29,18 @@ func TProxy(fd uintptr, isIPv6 bool) error {
 	return err
 }
 
+func TProxyWriteBack() control.Func {
+	return func(network, address string, conn syscall.RawConn) error {
+		return control.Raw(conn, func(fd uintptr) error {
+			if M.ParseSocksaddr(address).Addr.Is6() {
+				return syscall.SetsockoptInt(int(fd), syscall.SOL_IPV6, unix.IPV6_TRANSPARENT, 1)
+			} else {
+				return syscall.SetsockoptInt(int(fd), syscall.SOL_IP, syscall.IP_TRANSPARENT, 1)
+			}
+		})
+	}
+}
+
 func GetOriginalDestinationFromOOB(oob []byte) (netip.AddrPort, error) {
 	controlMessages, err := unix.ParseSocketControlMessage(oob)
 	if err != nil {
@@ -46,79 +55,3 @@ func GetOriginalDestinationFromOOB(oob []byte) (netip.AddrPort, error) {
 	}
 	return netip.AddrPort{}, E.New("not found")
 }
-
-func DialUDP(lAddr *net.UDPAddr, rAddr *net.UDPAddr) (*net.UDPConn, error) {
-	rSockAddr, err := udpAddrToSockAddr(rAddr)
-	if err != nil {
-		return nil, err
-	}
-
-	lSockAddr, err := udpAddrToSockAddr(lAddr)
-	if err != nil {
-		return nil, err
-	}
-
-	fd, err := syscall.Socket(udpAddrFamily(lAddr, rAddr), syscall.SOCK_DGRAM, 0)
-	if err != nil {
-		return nil, err
-	}
-
-	if err = syscall.SetsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1); err != nil {
-		syscall.Close(fd)
-		return nil, err
-	}
-
-	if err = syscall.SetsockoptInt(fd, syscall.SOL_IP, syscall.IP_TRANSPARENT, 1); err != nil {
-		syscall.Close(fd)
-		return nil, err
-	}
-
-	if err = syscall.Bind(fd, lSockAddr); err != nil {
-		syscall.Close(fd)
-		return nil, err
-	}
-
-	if err = syscall.Connect(fd, rSockAddr); err != nil {
-		syscall.Close(fd)
-		return nil, err
-	}
-
-	fdFile := os.NewFile(uintptr(fd), F.ToString("net-udp-dial-", rAddr))
-	defer fdFile.Close()
-
-	c, err := net.FileConn(fdFile)
-	if err != nil {
-		syscall.Close(fd)
-		return nil, err
-	}
-
-	return c.(*net.UDPConn), nil
-}
-
-func udpAddrToSockAddr(addr *net.UDPAddr) (syscall.Sockaddr, error) {
-	switch {
-	case addr.IP.To4() != nil:
-		ip := [4]byte{}
-		copy(ip[:], addr.IP.To4())
-
-		return &syscall.SockaddrInet4{Addr: ip, Port: addr.Port}, nil
-
-	default:
-		ip := [16]byte{}
-		copy(ip[:], addr.IP.To16())
-
-		zoneID, err := strconv.ParseUint(addr.Zone, 10, 32)
-		if err != nil {
-			zoneID = 0
-		}
-
-		return &syscall.SockaddrInet6{Addr: ip, Port: addr.Port, ZoneId: uint32(zoneID)}, nil
-	}
-}
-
-func udpAddrFamily(lAddr, rAddr *net.UDPAddr) int {
-	if (lAddr == nil || lAddr.IP.To4() != nil) && (rAddr == nil || lAddr.IP.To4() != nil) {
-		return syscall.AF_INET
-	}
-	return syscall.AF_INET6
-}

common/redir/tproxy_other.go

@@ -3,19 +3,20 @@
 package redir
 
 import (
-	"net"
 	"net/netip"
 	"os"
+
+	"github.com/sagernet/sing/common/control"
 )
 
 func TProxy(fd uintptr, isIPv6 bool) error {
 	return os.ErrInvalid
 }
 
+func TProxyWriteBack() control.Func {
+	return nil
+}
+
 func GetOriginalDestinationFromOOB(oob []byte) (netip.AddrPort, error) {
 	return netip.AddrPort{}, os.ErrInvalid
 }
-
-func DialUDP(lAddr *net.UDPAddr, rAddr *net.UDPAddr) (*net.UDPConn, error) {
-	return nil, os.ErrInvalid
-}

common/settings/proxy_android.go

@@ -6,8 +6,8 @@ import (
 
 	"github.com/sagernet/sing-box/adapter"
 	C "github.com/sagernet/sing-box/constant"
-	"github.com/sagernet/sing/common"
 	F "github.com/sagernet/sing/common/format"
+	"github.com/sagernet/sing/common/shell"
 )
 
 var (
@@ -26,9 +26,9 @@ func init() {
 
 func runAndroidShell(name string, args ...string) error {
 	if !useRish {
-		return common.Exec(name, args...).Attach().Run()
+		return shell.Exec(name, args...).Attach().Run()
 	} else {
-		return common.Exec("sh", rishPath, "-c", F.ToString(name, " ", strings.Join(args, " "))).Attach().Run()
+		return shell.Exec("sh", rishPath, "-c", F.ToString(name, " ", strings.Join(args, " "))).Attach().Run()
 	}
 }
 

common/settings/proxy_darwin.go

@@ -6,9 +6,9 @@ import (
 
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-tun"
-	"github.com/sagernet/sing/common"
 	E "github.com/sagernet/sing/common/exceptions"
 	F "github.com/sagernet/sing/common/format"
+	"github.com/sagernet/sing/common/shell"
 	"github.com/sagernet/sing/common/x/list"
 )
 
@@ -34,13 +34,13 @@ func (p *systemProxy) update(event int) error {
 		return err
 	}
 	if p.isMixed {
-		err = common.Exec("networksetup", "-setsocksfirewallproxy", interfaceDisplayName, "127.0.0.1", F.ToString(p.port)).Attach().Run()
+		err = shell.Exec("networksetup", "-setsocksfirewallproxy", interfaceDisplayName, "127.0.0.1", F.ToString(p.port)).Attach().Run()
 	}
 	if err == nil {
-		err = common.Exec("networksetup", "-setwebproxy", interfaceDisplayName, "127.0.0.1", F.ToString(p.port)).Attach().Run()
+		err = shell.Exec("networksetup", "-setwebproxy", interfaceDisplayName, "127.0.0.1", F.ToString(p.port)).Attach().Run()
 	}
 	if err == nil {
-		err = common.Exec("networksetup", "-setsecurewebproxy", interfaceDisplayName, "127.0.0.1", F.ToString(p.port)).Attach().Run()
+		err = shell.Exec("networksetup", "-setsecurewebproxy", interfaceDisplayName, "127.0.0.1", F.ToString(p.port)).Attach().Run()
 	}
 	return err
 }
@@ -51,19 +51,19 @@ func (p *systemProxy) unset() error {
 		return err
 	}
 	if p.isMixed {
-		err = common.Exec("networksetup", "-setsocksfirewallproxystate", interfaceDisplayName, "off").Attach().Run()
+		err = shell.Exec("networksetup", "-setsocksfirewallproxystate", interfaceDisplayName, "off").Attach().Run()
 	}
 	if err == nil {
-		err = common.Exec("networksetup", "-setwebproxystate", interfaceDisplayName, "off").Attach().Run()
+		err = shell.Exec("networksetup", "-setwebproxystate", interfaceDisplayName, "off").Attach().Run()
 	}
 	if err == nil {
-		err = common.Exec("networksetup", "-setsecurewebproxystate", interfaceDisplayName, "off").Attach().Run()
+		err = shell.Exec("networksetup", "-setsecurewebproxystate", interfaceDisplayName, "off").Attach().Run()
 	}
 	return err
 }
 
 func getInterfaceDisplayName(name string) (string, error) {
-	content, err := common.Exec("networksetup", "-listallhardwareports").Read()
+	content, err := shell.Exec("networksetup", "-listallhardwareports").ReadOutput()
 	if err != nil {
 		return "", err
 	}

common/settings/proxy_linux.go

@@ -11,6 +11,7 @@ import (
 	"github.com/sagernet/sing/common"
 	E "github.com/sagernet/sing/common/exceptions"
 	F "github.com/sagernet/sing/common/format"
+	"github.com/sagernet/sing/common/shell"
 )
 
 var (
@@ -27,9 +28,9 @@ func init() {
 
 func runAsUser(name string, args ...string) error {
 	if os.Getuid() != 0 {
-		return common.Exec(name, args...).Attach().Run()
+		return shell.Exec(name, args...).Attach().Run()
 	} else if sudoUser != "" {
-		return common.Exec("su", "-", sudoUser, "-c", F.ToString(name, " ", strings.Join(args, " "))).Attach().Run()
+		return shell.Exec("su", "-", sudoUser, "-c", F.ToString(name, " ", strings.Join(args, " "))).Attach().Run()
 	} else {
 		return E.New("set system proxy: unable to set as root")
 	}

common/settings/proxy_windows.go

@@ -7,7 +7,7 @@ import (
 )
 
 func SetSystemProxy(router adapter.Router, port uint16, isMixed bool) (func() error, error) {
-	err := wininet.SetSystemProxy(F.ToString("http://127.0.0.1:", port), "<local>")
+	err := wininet.SetSystemProxy(F.ToString("http://127.0.0.1:", port), "")
 	if err != nil {
 		return nil, err
 	}

common/settings/time_stub.go

@@ -0,0 +1,12 @@
+//go:build !(windows || linux || darwin)
+
+package settings
+
+import (
+	"os"
+	"time"
+)
+
+func SetSystemTime(nowTime time.Time) error {
+	return os.ErrInvalid
+}

common/settings/time_unix.go

@@ -0,0 +1,14 @@
+//go:build linux || darwin
+
+package settings
+
+import (
+	"time"
+
+	"golang.org/x/sys/unix"
+)
+
+func SetSystemTime(nowTime time.Time) error {
+	timeVal := unix.NsecToTimeval(nowTime.UnixNano())
+	return unix.Settimeofday(&timeVal)
+}

common/settings/time_windows.go

@@ -0,0 +1,32 @@
+package settings
+
+import (
+	"time"
+	"unsafe"
+
+	"golang.org/x/sys/windows"
+)
+
+func SetSystemTime(nowTime time.Time) error {
+	var systemTime windows.Systemtime
+	systemTime.Year = uint16(nowTime.Year())
+	systemTime.Month = uint16(nowTime.Month())
+	systemTime.Day = uint16(nowTime.Day())
+	systemTime.Hour = uint16(nowTime.Hour())
+	systemTime.Minute = uint16(nowTime.Minute())
+	systemTime.Second = uint16(nowTime.Second())
+	systemTime.Milliseconds = uint16(nowTime.UnixMilli() - nowTime.Unix()*1000)
+
+	dllKernel32 := windows.NewLazySystemDLL("kernel32.dll")
+	proc := dllKernel32.NewProc("SetSystemTime")
+
+	_, _, err := proc.Call(
+		uintptr(unsafe.Pointer(&systemTime)),
+	)
+
+	if err != nil && err.Error() != "The operation completed successfully." {
+		return err
+	}
+
+	return nil
+}

common/sniff/dns.go

@@ -11,9 +11,10 @@ import (
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/buf"
+	M "github.com/sagernet/sing/common/metadata"
 	"github.com/sagernet/sing/common/task"
 
-	"golang.org/x/net/dns/dnsmessage"
+	mDNS "github.com/miekg/dns"
 )
 
 func StreamDomainNameQuery(readCtx context.Context, reader io.Reader) (*adapter.InboundContext, error) {
@@ -44,18 +45,13 @@ func StreamDomainNameQuery(readCtx context.Context, reader io.Reader) (*adapter.
 }
 
 func DomainNameQuery(ctx context.Context, packet []byte) (*adapter.InboundContext, error) {
-	var parser dnsmessage.Parser
-	_, err := parser.Start(packet)
+	var msg mDNS.Msg
+	err := msg.Unpack(packet)
 	if err != nil {
 		return nil, err
 	}
-	question, err := parser.Question()
-	if err != nil {
+	if len(msg.Question) == 0 || msg.Question[0].Qclass != mDNS.ClassINET || !M.IsDomainName(msg.Question[0].Name) {
 		return nil, os.ErrInvalid
 	}
-	domain := question.Name.String()
-	if question.Class == dnsmessage.ClassINET && IsDomainName(domain) {
-		return &adapter.InboundContext{Protocol: C.ProtocolDNS /*, Domain: domain*/}, nil
-	}
-	return nil, os.ErrInvalid
+	return &adapter.InboundContext{Protocol: C.ProtocolDNS}, nil
 }

common/sniff/domain.go

@@ -1,6 +0,0 @@
-package sniff
-
-import _ "unsafe" // for linkname
-
-//go:linkname IsDomainName net.isDomainName
-func IsDomainName(domain string) bool

common/sniff/internal/qtls/qtls.go

@@ -13,13 +13,13 @@ import (
 const (
 	VersionDraft29 = 0xff00001d
 	Version1       = 0x1
-	Version2       = 0x709a50c4
+	Version2       = 0x6b3343cf
 )
 
 var (
 	SaltOld = []byte{0xaf, 0xbf, 0xec, 0x28, 0x99, 0x93, 0xd2, 0x4c, 0x9e, 0x97, 0x86, 0xf1, 0x9c, 0x61, 0x11, 0xe0, 0x43, 0x90, 0xa8, 0x99}
 	SaltV1  = []byte{0x38, 0x76, 0x2c, 0xf7, 0xf5, 0x59, 0x34, 0xb3, 0x4d, 0x17, 0x9a, 0xe6, 0xa4, 0xc8, 0x0c, 0xad, 0xcc, 0xbb, 0x7f, 0x0a}
-	SaltV2  = []byte{0xa7, 0x07, 0xc2, 0x03, 0xa5, 0x9b, 0x47, 0x18, 0x4a, 0x1d, 0x62, 0xca, 0x57, 0x04, 0x06, 0xea, 0x7a, 0xe3, 0xe5, 0xd3}
+	SaltV2  = []byte{0x0d, 0xed, 0xe3, 0xde, 0xf7, 0x00, 0xa6, 0xdb, 0x81, 0x93, 0x81, 0xbe, 0x6e, 0x26, 0x9d, 0xcb, 0xf9, 0xbd, 0x2e, 0xd9}
 )
 
 const (

common/sniff/quic.go

@@ -24,8 +24,7 @@ func QUICClientHello(ctx context.Context, packet []byte) (*adapter.InboundContex
 	if err != nil {
 		return nil, err
 	}
-
-	if typeByte&0x80 == 0 || typeByte&0x40 == 0 {
+	if typeByte&0x40 == 0 {
 		return nil, E.New("bad type byte")
 	}
 	var versionNumber uint32
@@ -145,9 +144,6 @@ func QUICClientHello(ctx context.Context, packet []byte) (*adapter.InboundContex
 	default:
 		return nil, E.New("bad packet number length")
 	}
-	if packetNumber != 0 {
-		return nil, E.New("bad packet number: ", packetNumber)
-	}
 	extHdrLen := hdrLen + int(packetNumberLength)
 	copy(newPacket[extHdrLen:hdrLen+4], packet[extHdrLen:])
 	data := newPacket[extHdrLen : int(packetLen)+hdrLen]
@@ -172,37 +168,76 @@ func QUICClientHello(ctx context.Context, packet []byte) (*adapter.InboundContex
 	if err != nil {
 		return nil, err
 	}
+	var frameType byte
+	var frameLen uint64
+	var fragments []struct {
+		offset  uint64
+		length  uint64
+		payload []byte
+	}
 	decryptedReader := bytes.NewReader(decrypted)
-	frameType, err := decryptedReader.ReadByte()
-	if err != nil {
-		return nil, err
-	}
-	for frameType == 0x0 {
-		// skip padding
+	for {
 		frameType, err = decryptedReader.ReadByte()
-		if err != nil {
-			return nil, err
+		if err == io.EOF {
+			break
+		}
+		switch frameType {
+		case 0x0:
+			continue
+		case 0x1:
+			continue
+		case 0x6:
+			var offset uint64
+			offset, err = qtls.ReadUvarint(decryptedReader)
+			if err != nil {
+				return &adapter.InboundContext{Protocol: C.ProtocolQUIC}, err
+			}
+			var length uint64
+			length, err = qtls.ReadUvarint(decryptedReader)
+			if err != nil {
+				return &adapter.InboundContext{Protocol: C.ProtocolQUIC}, err
+			}
+			index := len(decrypted) - decryptedReader.Len()
+			fragments = append(fragments, struct {
+				offset  uint64
+				length  uint64
+				payload []byte
+			}{offset, length, decrypted[index : index+int(length)]})
+			frameLen += length
+			_, err = decryptedReader.Seek(int64(length), io.SeekCurrent)
+			if err != nil {
+				return nil, err
+			}
+		default:
+			// ignore unknown frame type
 		}
-	}
-	if frameType != 0x6 {
-		// not crypto frame
-		return &adapter.InboundContext{Protocol: C.ProtocolQUIC}, nil
-	}
-	_, err = qtls.ReadUvarint(decryptedReader)
-	if err != nil {
-		return nil, err
-	}
-	_, err = qtls.ReadUvarint(decryptedReader)
-	if err != nil {
-		return nil, err
 	}
 	tlsHdr := make([]byte, 5)
 	tlsHdr[0] = 0x16
 	binary.BigEndian.PutUint16(tlsHdr[1:], uint16(0x0303))
-	binary.BigEndian.PutUint16(tlsHdr[3:], uint16(decryptedReader.Len()))
-	metadata, err := TLSClientHello(ctx, io.MultiReader(bytes.NewReader(tlsHdr), decryptedReader))
+	binary.BigEndian.PutUint16(tlsHdr[3:], uint16(frameLen))
+	var index uint64
+	var length int
+	var readers []io.Reader
+	readers = append(readers, bytes.NewReader(tlsHdr))
+find:
+	for {
+		for _, fragment := range fragments {
+			if fragment.offset == index {
+				readers = append(readers, bytes.NewReader(fragment.payload))
+				index = fragment.offset + fragment.length
+				length++
+				continue find
+			}
+		}
+		if length == len(fragments) {
+			break
+		}
+		return &adapter.InboundContext{Protocol: C.ProtocolQUIC}, E.New("bad fragments")
+	}
+	metadata, err := TLSClientHello(ctx, io.MultiReader(readers...))
 	if err != nil {
-		return nil, err
+		return &adapter.InboundContext{Protocol: C.ProtocolQUIC}, err
 	}
 	metadata.Protocol = C.ProtocolQUIC
 	return metadata, nil

common/sniff/quic_test.go

@@ -19,6 +19,15 @@ func TestSniffQUICv1(t *testing.T) {
 	require.Equal(t, metadata.Domain, "cloudflare-quic.com")
 }
 
+func TestSniffQUICFragment(t *testing.T) {
+	t.Parallel()
+	pkt, err := hex.DecodeString("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")
+	require.NoError(t, err)
+	metadata, err := sniff.QUICClientHello(context.Background(), pkt)
+	require.NoError(t, err)
+	require.Equal(t, metadata.Domain, "cloudflare-quic.com")
+}
+
 func FuzzSniffQUIC(f *testing.F) {
 	f.Fuzz(func(t *testing.T, data []byte) {
 		sniff.QUICClientHello(context.Background(), data)

common/sniff/sniff.go

@@ -5,7 +5,6 @@ import (
 	"context"
 	"io"
 	"net"
-	"os"
 	"time"
 
 	"github.com/sagernet/sing-box/adapter"
@@ -19,34 +18,39 @@ type (
 	PacketSniffer = func(ctx context.Context, packet []byte) (*adapter.InboundContext, error)
 )
 
-func PeekStream(ctx context.Context, conn net.Conn, buffer *buf.Buffer, sniffers ...StreamSniffer) (*adapter.InboundContext, error) {
-	err := conn.SetReadDeadline(time.Now().Add(C.ReadPayloadTimeout))
+func PeekStream(ctx context.Context, conn net.Conn, buffer *buf.Buffer, timeout time.Duration, sniffers ...StreamSniffer) (*adapter.InboundContext, error) {
+	if timeout == 0 {
+		timeout = C.ReadPayloadTimeout
+	}
+	err := conn.SetReadDeadline(time.Now().Add(timeout))
 	if err != nil {
-		return nil, err
+		return nil, E.Cause(err, "set read deadline")
 	}
 	_, err = buffer.ReadOnceFrom(conn)
 	err = E.Errors(err, conn.SetReadDeadline(time.Time{}))
 	if err != nil {
-		return nil, err
+		return nil, E.Cause(err, "read payload")
 	}
 	var metadata *adapter.InboundContext
+	var errors []error
 	for _, sniffer := range sniffers {
 		metadata, err = sniffer(ctx, bytes.NewReader(buffer.Bytes()))
-		if err != nil {
-			continue
+		if metadata != nil {
+			return metadata, nil
 		}
-		return metadata, nil
+		errors = append(errors, err)
 	}
-	return nil, os.ErrInvalid
+	return nil, E.Errors(errors...)
 }
 
 func PeekPacket(ctx context.Context, packet []byte, sniffers ...PacketSniffer) (*adapter.InboundContext, error) {
+	var errors []error
 	for _, sniffer := range sniffers {
-		sniffMetadata, err := sniffer(ctx, packet)
-		if err != nil {
-			continue
+		metadata, err := sniffer(ctx, packet)
+		if metadata != nil {
+			return metadata, nil
 		}
-		return sniffMetadata, nil
+		errors = append(errors, err)
 	}
-	return nil, os.ErrInvalid
+	return nil, E.Errors(errors...)
 }

common/tls/acme.go

@@ -5,14 +5,17 @@ package tls
 import (
 	"context"
 	"crypto/tls"
+	"os"
 	"strings"
 
-	"github.com/sagernet/certmagic"
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/option"
 	E "github.com/sagernet/sing/common/exceptions"
 
+	"github.com/caddyserver/certmagic"
 	"github.com/mholt/acmez/acme"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
 )
 
 type acmeWrapper struct {
@@ -54,6 +57,11 @@ func startACME(ctx context.Context, options option.InboundACMEOptions) (*tls.Con
 	config := &certmagic.Config{
 		DefaultServerName: options.DefaultServerName,
 		Storage:           storage,
+		Logger: zap.New(zapcore.NewCore(
+			zapcore.NewConsoleEncoder(zap.NewProductionEncoderConfig()),
+			os.Stderr,
+			zap.InfoLevel,
+		)),
 	}
 	acmeConfig := certmagic.ACMEIssuer{
 		CA:                      acmeServer,
@@ -63,8 +71,9 @@ func startACME(ctx context.Context, options option.InboundACMEOptions) (*tls.Con
 		DisableTLSALPNChallenge: options.DisableTLSALPNChallenge,
 		AltHTTPPort:             int(options.AlternativeHTTPPort),
 		AltTLSALPNPort:          int(options.AlternativeTLSPort),
+		Logger:                  config.Logger,
 	}
-	if options.ExternalAccount != nil {
+	if options.ExternalAccount != nil && options.ExternalAccount.KeyID != "" {
 		acmeConfig.ExternalAccount = (*acme.EAB)(options.ExternalAccount)
 	}
 	config.Issuers = []certmagic.Issuer{certmagic.NewACMEIssuer(config, acmeConfig)}

common/tls/client.go

@@ -10,9 +10,13 @@ import (
 	"github.com/sagernet/sing-box/option"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
+	aTLS "github.com/sagernet/sing/common/tls"
 )
 
 func NewDialerFromOptions(router adapter.Router, dialer N.Dialer, serverAddress string, options option.OutboundTLSOptions) (N.Dialer, error) {
+	if !options.Enabled {
+		return dialer, nil
+	}
 	config, err := NewClient(router, serverAddress, options)
 	if err != nil {
 		return nil, err
@@ -21,21 +25,24 @@ func NewDialerFromOptions(router adapter.Router, dialer N.Dialer, serverAddress
 }
 
 func NewClient(router adapter.Router, serverAddress string, options option.OutboundTLSOptions) (Config, error) {
+	if !options.Enabled {
+		return nil, nil
+	}
 	if options.ECH != nil && options.ECH.Enabled {
-		return newECHClient(router, serverAddress, options)
+		return NewECHClient(router, serverAddress, options)
+	} else if options.Reality != nil && options.Reality.Enabled {
+		return NewRealityClient(router, serverAddress, options)
 	} else if options.UTLS != nil && options.UTLS.Enabled {
-		return newUTLSClient(router, serverAddress, options)
+		return NewUTLSClient(router, serverAddress, options)
 	} else {
-		return newStdClient(serverAddress, options)
+		return NewSTDClient(router, serverAddress, options)
 	}
 }
 
 func ClientHandshake(ctx context.Context, conn net.Conn, config Config) (Conn, error) {
-	tlsConn := config.Client(conn)
 	ctx, cancel := context.WithTimeout(ctx, C.TCPTimeout)
 	defer cancel()
-	err := tlsConn.HandshakeContext(ctx)
-	return tlsConn, err
+	return aTLS.ClientHandshake(ctx, conn, config)
 }
 
 type Dialer struct {

common/tls/config.go

@@ -1,38 +1,25 @@
 package tls
 
 import (
-	"context"
 	"crypto/tls"
-	"net"
 
-	"github.com/sagernet/sing-box/adapter"
 	E "github.com/sagernet/sing/common/exceptions"
+	aTLS "github.com/sagernet/sing/common/tls"
 )
 
 type (
-	STDConfig = tls.Config
-	STDConn   = tls.Conn
+	Config                 = aTLS.Config
+	ConfigCompat           = aTLS.ConfigCompat
+	ServerConfig           = aTLS.ServerConfig
+	ServerConfigCompat     = aTLS.ServerConfigCompat
+	WithSessionIDGenerator = aTLS.WithSessionIDGenerator
+	Conn                   = aTLS.Conn
+
+	STDConfig       = tls.Config
+	STDConn         = tls.Conn
+	ConnectionState = tls.ConnectionState
 )
 
-type Config interface {
-	NextProtos() []string
-	SetNextProtos(nextProto []string)
-	Config() (*STDConfig, error)
-	Client(conn net.Conn) Conn
-}
-
-type ServerConfig interface {
-	Config
-	adapter.Service
-	Server(conn net.Conn) Conn
-}
-
-type Conn interface {
-	net.Conn
-	HandshakeContext(ctx context.Context) error
-	ConnectionState() tls.ConnectionState
-}
-
 func ParseTLSVersion(version string) (uint16, error) {
 	switch version {
 	case "1.0":

common/tls/ech_client.go

@@ -11,34 +11,47 @@ import (
 	"net/netip"
 	"os"
 
+	cftls "github.com/sagernet/cloudflare-tls"
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/option"
-	cftls "github.com/sagernet/sing-box/transport/cloudflaretls"
 	"github.com/sagernet/sing-dns"
 	E "github.com/sagernet/sing/common/exceptions"
 
 	mDNS "github.com/miekg/dns"
-	"golang.org/x/net/dns/dnsmessage"
 )
 
-type echClientConfig struct {
+type ECHClientConfig struct {
 	config *cftls.Config
 }
 
-func (e *echClientConfig) NextProtos() []string {
+func (e *ECHClientConfig) ServerName() string {
+	return e.config.ServerName
+}
+
+func (e *ECHClientConfig) SetServerName(serverName string) {
+	e.config.ServerName = serverName
+}
+
+func (e *ECHClientConfig) NextProtos() []string {
 	return e.config.NextProtos
 }
 
-func (e *echClientConfig) SetNextProtos(nextProto []string) {
+func (e *ECHClientConfig) SetNextProtos(nextProto []string) {
 	e.config.NextProtos = nextProto
 }
 
-func (e *echClientConfig) Config() (*STDConfig, error) {
+func (e *ECHClientConfig) Config() (*STDConfig, error) {
 	return nil, E.New("unsupported usage for ECH")
 }
 
-func (e *echClientConfig) Client(conn net.Conn) Conn {
-	return &echConnWrapper{cftls.Client(conn, e.config)}
+func (e *ECHClientConfig) Client(conn net.Conn) (Conn, error) {
+	return &echConnWrapper{cftls.Client(conn, e.config)}, nil
+}
+
+func (e *ECHClientConfig) Clone() Config {
+	return &ECHClientConfig{
+		config: e.config.Clone(),
+	}
 }
 
 type echConnWrapper struct {
@@ -63,7 +76,11 @@ func (c *echConnWrapper) ConnectionState() tls.ConnectionState {
 	}
 }
 
-func newECHClient(router adapter.Router, serverAddress string, options option.OutboundTLSOptions) (Config, error) {
+func (c *echConnWrapper) Upstream() any {
+	return c.Conn
+}
+
+func NewECHClient(router adapter.Router, serverAddress string, options option.OutboundTLSOptions) (Config, error) {
 	var serverName string
 	if options.ServerName != "" {
 		serverName = options.ServerName
@@ -77,6 +94,7 @@ func newECHClient(router adapter.Router, serverAddress string, options option.Ou
 	}
 
 	var tlsConfig cftls.Config
+	tlsConfig.Time = router.TimeFunc()
 	if options.DisableSNI {
 		tlsConfig.ServerName = "127.0.0.1"
 	} else {
@@ -163,22 +181,20 @@ func newECHClient(router adapter.Router, serverAddress string, options option.Ou
 	} else {
 		tlsConfig.GetClientECHConfigs = fetchECHClientConfig(router)
 	}
-	return &echClientConfig{&tlsConfig}, nil
+	return &ECHClientConfig{&tlsConfig}, nil
 }
 
-const typeHTTPS = 65
-
 func fetchECHClientConfig(router adapter.Router) func(ctx context.Context, serverName string) ([]cftls.ECHConfig, error) {
 	return func(ctx context.Context, serverName string) ([]cftls.ECHConfig, error) {
-		message := &dnsmessage.Message{
-			Header: dnsmessage.Header{
+		message := &mDNS.Msg{
+			MsgHdr: mDNS.MsgHdr{
 				RecursionDesired: true,
 			},
-			Questions: []dnsmessage.Question{
+			Question: []mDNS.Question{
 				{
-					Name:  dnsmessage.MustNewName(serverName + "."),
-					Type:  typeHTTPS,
-					Class: dnsmessage.ClassINET,
+					Name:   serverName + ".",
+					Qtype:  mDNS.TypeHTTPS,
+					Qclass: mDNS.ClassINET,
 				},
 			},
 		}
@@ -186,19 +202,10 @@ func fetchECHClientConfig(router adapter.Router) func(ctx context.Context, serve
 		if err != nil {
 			return nil, err
 		}
-		if response.RCode != dnsmessage.RCodeSuccess {
-			return nil, dns.RCodeError(response.RCode)
+		if response.Rcode != mDNS.RcodeSuccess {
+			return nil, dns.RCodeError(response.Rcode)
 		}
-		content, err := response.Pack()
-		if err != nil {
-			return nil, err
-		}
-		var mMsg mDNS.Msg
-		err = mMsg.Unpack(content)
-		if err != nil {
-			return nil, err
-		}
-		for _, rr := range mMsg.Answer {
+		for _, rr := range response.Answer {
 			switch resource := rr.(type) {
 			case *mDNS.HTTPS:
 				for _, value := range resource.Value {

common/tls/ech_stub.go

@@ -8,6 +8,6 @@ import (
 	E "github.com/sagernet/sing/common/exceptions"
 )
 
-func newECHClient(router adapter.Router, serverAddress string, options option.OutboundTLSOptions) (Config, error) {
+func NewECHClient(router adapter.Router, serverAddress string, options option.OutboundTLSOptions) (Config, error) {
 	return nil, E.New(`ECH is not included in this build, rebuild with -tags with_ech`)
 }

common/tls/mkcert.go

@@ -0,0 +1,53 @@
+package tls
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/tls"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/pem"
+	"math/big"
+	"time"
+)
+
+func GenerateKeyPair(timeFunc func() time.Time, serverName string) (*tls.Certificate, error) {
+	if timeFunc == nil {
+		timeFunc = time.Now
+	}
+	key, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		return nil, err
+	}
+	serialNumber, err := rand.Int(rand.Reader, new(big.Int).Lsh(big.NewInt(1), 128))
+	if err != nil {
+		return nil, err
+	}
+	template := &x509.Certificate{
+		SerialNumber:          serialNumber,
+		NotBefore:             timeFunc().Add(time.Hour * -1),
+		NotAfter:              timeFunc().Add(time.Hour),
+		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
+		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+		BasicConstraintsValid: true,
+		Subject: pkix.Name{
+			CommonName: serverName,
+		},
+		DNSNames: []string{serverName},
+	}
+	publicDer, err := x509.CreateCertificate(rand.Reader, template, template, key.Public(), key)
+	if err != nil {
+		return nil, err
+	}
+	privateDer, err := x509.MarshalPKCS8PrivateKey(key)
+	if err != nil {
+		return nil, err
+	}
+	publicPem := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: publicDer})
+	privPem := pem.EncodeToMemory(&pem.Block{Type: "PRIVATE KEY", Bytes: privateDer})
+	keyPair, err := tls.X509KeyPair(publicPem, privPem)
+	if err != nil {
+		return nil, err
+	}
+	return &keyPair, err
+}

common/tls/reality_client.go

@@ -0,0 +1,232 @@
+//go:build with_utls
+
+package tls
+
+import (
+	"bytes"
+	"context"
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/ed25519"
+	"crypto/hmac"
+	"crypto/sha256"
+	"crypto/sha512"
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/base64"
+	"encoding/binary"
+	"encoding/hex"
+	"fmt"
+	"io"
+	mRand "math/rand"
+	"net"
+	"net/http"
+	"reflect"
+	"strings"
+	"time"
+	"unsafe"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing/common/debug"
+	E "github.com/sagernet/sing/common/exceptions"
+	aTLS "github.com/sagernet/sing/common/tls"
+	utls "github.com/sagernet/utls"
+
+	"golang.org/x/crypto/hkdf"
+	"golang.org/x/net/http2"
+)
+
+var _ ConfigCompat = (*RealityClientConfig)(nil)
+
+type RealityClientConfig struct {
+	uClient   *UTLSClientConfig
+	publicKey []byte
+	shortID   [8]byte
+}
+
+func NewRealityClient(router adapter.Router, serverAddress string, options option.OutboundTLSOptions) (*RealityClientConfig, error) {
+	if options.UTLS == nil || !options.UTLS.Enabled {
+		return nil, E.New("uTLS is required by reality client")
+	}
+
+	uClient, err := NewUTLSClient(router, serverAddress, options)
+	if err != nil {
+		return nil, err
+	}
+
+	publicKey, err := base64.RawURLEncoding.DecodeString(options.Reality.PublicKey)
+	if err != nil {
+		return nil, E.Cause(err, "decode public_key")
+	}
+	if len(publicKey) != 32 {
+		return nil, E.New("invalid public_key")
+	}
+	var shortID [8]byte
+	decodedLen, err := hex.Decode(shortID[:], []byte(options.Reality.ShortID))
+	if err != nil {
+		return nil, E.Cause(err, "decode short_id")
+	}
+	if decodedLen > 8 {
+		return nil, E.New("invalid short_id")
+	}
+	return &RealityClientConfig{uClient, publicKey, shortID}, nil
+}
+
+func (e *RealityClientConfig) ServerName() string {
+	return e.uClient.ServerName()
+}
+
+func (e *RealityClientConfig) SetServerName(serverName string) {
+	e.uClient.SetServerName(serverName)
+}
+
+func (e *RealityClientConfig) NextProtos() []string {
+	return e.uClient.NextProtos()
+}
+
+func (e *RealityClientConfig) SetNextProtos(nextProto []string) {
+	e.uClient.SetNextProtos(nextProto)
+}
+
+func (e *RealityClientConfig) Config() (*STDConfig, error) {
+	return nil, E.New("unsupported usage for reality")
+}
+
+func (e *RealityClientConfig) Client(conn net.Conn) (Conn, error) {
+	return ClientHandshake(context.Background(), conn, e)
+}
+
+func (e *RealityClientConfig) ClientHandshake(ctx context.Context, conn net.Conn) (aTLS.Conn, error) {
+	verifier := &realityVerifier{
+		serverName: e.uClient.ServerName(),
+	}
+	uConfig := e.uClient.config.Clone()
+	uConfig.InsecureSkipVerify = true
+	uConfig.SessionTicketsDisabled = true
+	uConfig.VerifyPeerCertificate = verifier.VerifyPeerCertificate
+	uConn := utls.UClient(conn, uConfig, e.uClient.id)
+	verifier.UConn = uConn
+	err := uConn.BuildHandshakeState()
+	if err != nil {
+		return nil, err
+	}
+	hello := uConn.HandshakeState.Hello
+	hello.SessionId = make([]byte, 32)
+	copy(hello.Raw[39:], hello.SessionId)
+
+	var nowTime time.Time
+	if uConfig.Time != nil {
+		nowTime = uConfig.Time()
+	} else {
+		nowTime = time.Now()
+	}
+	binary.BigEndian.PutUint64(hello.SessionId, uint64(nowTime.Unix()))
+
+	hello.SessionId[0] = 1
+	hello.SessionId[1] = 8
+	hello.SessionId[2] = 0
+	binary.BigEndian.PutUint32(hello.SessionId[4:], uint32(time.Now().Unix()))
+	copy(hello.SessionId[8:], e.shortID[:])
+
+	if debug.Enabled {
+		fmt.Printf("REALITY hello.sessionId[:16]: %v\n", hello.SessionId[:16])
+	}
+
+	authKey := uConn.HandshakeState.State13.EcdheParams.SharedKey(e.publicKey)
+	if authKey == nil {
+		return nil, E.New("nil auth_key")
+	}
+	verifier.authKey = authKey
+	_, err = hkdf.New(sha256.New, authKey, hello.Random[:20], []byte("REALITY")).Read(authKey)
+	if err != nil {
+		return nil, err
+	}
+	aesBlock, _ := aes.NewCipher(authKey)
+	aesGcmCipher, _ := cipher.NewGCM(aesBlock)
+	aesGcmCipher.Seal(hello.SessionId[:0], hello.Random[20:], hello.SessionId[:16], hello.Raw)
+	copy(hello.Raw[39:], hello.SessionId)
+	if debug.Enabled {
+		fmt.Printf("REALITY hello.sessionId: %v\n", hello.SessionId)
+		fmt.Printf("REALITY uConn.AuthKey: %v\n", authKey)
+	}
+
+	err = uConn.HandshakeContext(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	if debug.Enabled {
+		fmt.Printf("REALITY Conn.Verified: %v\n", verifier.verified)
+	}
+
+	if !verifier.verified {
+		go realityClientFallback(uConn, e.uClient.ServerName(), e.uClient.id)
+		return nil, E.New("reality verification failed")
+	}
+
+	return &utlsConnWrapper{uConn}, nil
+}
+
+func realityClientFallback(uConn net.Conn, serverName string, fingerprint utls.ClientHelloID) {
+	defer uConn.Close()
+	client := &http.Client{
+		Transport: &http2.Transport{
+			DialTLSContext: func(ctx context.Context, network, addr string, config *tls.Config) (net.Conn, error) {
+				return uConn, nil
+			},
+		},
+	}
+	request, _ := http.NewRequest("GET", "https://"+serverName, nil)
+	request.Header.Set("User-Agent", fingerprint.Client)
+	request.AddCookie(&http.Cookie{Name: "padding", Value: strings.Repeat("0", mRand.Intn(32)+30)})
+	response, err := client.Do(request)
+	if err != nil {
+		return
+	}
+	_, _ = io.Copy(io.Discard, response.Body)
+	response.Body.Close()
+}
+
+func (e *RealityClientConfig) SetSessionIDGenerator(generator func(clientHello []byte, sessionID []byte) error) {
+	e.uClient.config.SessionIDGenerator = generator
+}
+
+func (e *RealityClientConfig) Clone() Config {
+	return &RealityClientConfig{
+		e.uClient.Clone().(*UTLSClientConfig),
+		e.publicKey,
+		e.shortID,
+	}
+}
+
+type realityVerifier struct {
+	*utls.UConn
+	serverName string
+	authKey    []byte
+	verified   bool
+}
+
+func (c *realityVerifier) VerifyPeerCertificate(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
+	p, _ := reflect.TypeOf(c.Conn).Elem().FieldByName("peerCertificates")
+	certs := *(*([]*x509.Certificate))(unsafe.Pointer(uintptr(unsafe.Pointer(c.Conn)) + p.Offset))
+	if pub, ok := certs[0].PublicKey.(ed25519.PublicKey); ok {
+		h := hmac.New(sha512.New, c.authKey)
+		h.Write(pub)
+		if bytes.Equal(h.Sum(nil), certs[0].Signature) {
+			c.verified = true
+			return nil
+		}
+	}
+	opts := x509.VerifyOptions{
+		DNSName:       c.serverName,
+		Intermediates: x509.NewCertPool(),
+	}
+	for _, cert := range certs[1:] {
+		opts.Intermediates.AddCert(cert)
+	}
+	if _, err := certs[0].Verify(opts); err != nil {
+		return err
+	}
+	return nil
+}

common/tls/reality_server.go

@@ -0,0 +1,192 @@
+//go:build with_reality_server
+
+package tls
+
+import (
+	"context"
+	"crypto/tls"
+	"encoding/base64"
+	"encoding/hex"
+	"net"
+	"time"
+
+	"github.com/sagernet/reality"
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/common/dialer"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing/common/debug"
+	E "github.com/sagernet/sing/common/exceptions"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+)
+
+var _ ServerConfigCompat = (*RealityServerConfig)(nil)
+
+type RealityServerConfig struct {
+	config *reality.Config
+}
+
+func NewRealityServer(ctx context.Context, router adapter.Router, logger log.Logger, options option.InboundTLSOptions) (*RealityServerConfig, error) {
+	var tlsConfig reality.Config
+
+	if options.ACME != nil && len(options.ACME.Domain) > 0 {
+		return nil, E.New("acme is unavailable in reality")
+	}
+	tlsConfig.Time = router.TimeFunc()
+	if options.ServerName != "" {
+		tlsConfig.ServerName = options.ServerName
+	}
+	if len(options.ALPN) > 0 {
+		tlsConfig.NextProtos = append(tlsConfig.NextProtos, options.ALPN...)
+	}
+	if options.MinVersion != "" {
+		minVersion, err := ParseTLSVersion(options.MinVersion)
+		if err != nil {
+			return nil, E.Cause(err, "parse min_version")
+		}
+		tlsConfig.MinVersion = minVersion
+	}
+	if options.MaxVersion != "" {
+		maxVersion, err := ParseTLSVersion(options.MaxVersion)
+		if err != nil {
+			return nil, E.Cause(err, "parse max_version")
+		}
+		tlsConfig.MaxVersion = maxVersion
+	}
+	if options.CipherSuites != nil {
+	find:
+		for _, cipherSuite := range options.CipherSuites {
+			for _, tlsCipherSuite := range tls.CipherSuites() {
+				if cipherSuite == tlsCipherSuite.Name {
+					tlsConfig.CipherSuites = append(tlsConfig.CipherSuites, tlsCipherSuite.ID)
+					continue find
+				}
+			}
+			return nil, E.New("unknown cipher_suite: ", cipherSuite)
+		}
+	}
+	if options.Certificate != "" || options.CertificatePath != "" {
+		return nil, E.New("certificate is unavailable in reality")
+	}
+	if options.Key != "" || options.KeyPath != "" {
+		return nil, E.New("key is unavailable in reality")
+	}
+
+	tlsConfig.SessionTicketsDisabled = true
+	tlsConfig.Type = N.NetworkTCP
+	tlsConfig.Dest = options.Reality.Handshake.ServerOptions.Build().String()
+
+	tlsConfig.ServerNames = map[string]bool{options.ServerName: true}
+	privateKey, err := base64.RawURLEncoding.DecodeString(options.Reality.PrivateKey)
+	if err != nil {
+		return nil, E.Cause(err, "decode private key")
+	}
+	if len(privateKey) != 32 {
+		return nil, E.New("invalid private key")
+	}
+	tlsConfig.PrivateKey = privateKey
+	tlsConfig.MaxTimeDiff = time.Duration(options.Reality.MaxTimeDifference)
+
+	tlsConfig.ShortIds = make(map[[8]byte]bool)
+	for i, shortIDString := range options.Reality.ShortID {
+		var shortID [8]byte
+		decodedLen, err := hex.Decode(shortID[:], []byte(shortIDString))
+		if err != nil {
+			return nil, E.Cause(err, "decode short_id[", i, "]: ", shortIDString)
+		}
+		if decodedLen > 8 {
+			return nil, E.New("invalid short_id[", i, "]: ", shortIDString)
+		}
+		tlsConfig.ShortIds[shortID] = true
+	}
+
+	handshakeDialer := dialer.New(router, options.Reality.Handshake.DialerOptions)
+	tlsConfig.DialContext = func(ctx context.Context, network, addr string) (net.Conn, error) {
+		return handshakeDialer.DialContext(ctx, network, M.ParseSocksaddr(addr))
+	}
+
+	if debug.Enabled {
+		tlsConfig.Show = true
+	}
+
+	return &RealityServerConfig{&tlsConfig}, nil
+}
+
+func (c *RealityServerConfig) ServerName() string {
+	return c.config.ServerName
+}
+
+func (c *RealityServerConfig) SetServerName(serverName string) {
+	c.config.ServerName = serverName
+}
+
+func (c *RealityServerConfig) NextProtos() []string {
+	return c.config.NextProtos
+}
+
+func (c *RealityServerConfig) SetNextProtos(nextProto []string) {
+	c.config.NextProtos = nextProto
+}
+
+func (c *RealityServerConfig) Config() (*tls.Config, error) {
+	return nil, E.New("unsupported usage for reality")
+}
+
+func (c *RealityServerConfig) Client(conn net.Conn) (Conn, error) {
+	return ClientHandshake(context.Background(), conn, c)
+}
+
+func (c *RealityServerConfig) Start() error {
+	return nil
+}
+
+func (c *RealityServerConfig) Close() error {
+	return nil
+}
+
+func (c *RealityServerConfig) Server(conn net.Conn) (Conn, error) {
+	return ServerHandshake(context.Background(), conn, c)
+}
+
+func (c *RealityServerConfig) ServerHandshake(ctx context.Context, conn net.Conn) (Conn, error) {
+	tlsConn, err := reality.Server(ctx, conn, c.config)
+	if err != nil {
+		return nil, err
+	}
+	return &realityConnWrapper{Conn: tlsConn}, nil
+}
+
+func (c *RealityServerConfig) Clone() Config {
+	return &RealityServerConfig{
+		config: c.config.Clone(),
+	}
+}
+
+var _ Conn = (*realityConnWrapper)(nil)
+
+type realityConnWrapper struct {
+	*reality.Conn
+}
+
+func (c *realityConnWrapper) ConnectionState() ConnectionState {
+	state := c.Conn.ConnectionState()
+	return tls.ConnectionState{
+		Version:                     state.Version,
+		HandshakeComplete:           state.HandshakeComplete,
+		DidResume:                   state.DidResume,
+		CipherSuite:                 state.CipherSuite,
+		NegotiatedProtocol:          state.NegotiatedProtocol,
+		NegotiatedProtocolIsMutual:  state.NegotiatedProtocolIsMutual,
+		ServerName:                  state.ServerName,
+		PeerCertificates:            state.PeerCertificates,
+		VerifiedChains:              state.VerifiedChains,
+		SignedCertificateTimestamps: state.SignedCertificateTimestamps,
+		OCSPResponse:                state.OCSPResponse,
+		TLSUnique:                   state.TLSUnique,
+	}
+}
+
+func (c *realityConnWrapper) Upstream() any {
+	return c.Conn
+}

common/tls/reality_stub.go

@@ -0,0 +1,16 @@
+//go:build !with_reality_server
+
+package tls
+
+import (
+	"context"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	E "github.com/sagernet/sing/common/exceptions"
+)
+
+func NewRealityServer(ctx context.Context, router adapter.Router, logger log.Logger, options option.InboundTLSOptions) (ServerConfig, error) {
+	return nil, E.New(`reality server is not included in this build, rebuild with -tags with_reality_server`)
+}

common/tls/server.go

@@ -2,11 +2,28 @@ package tls
 
 import (
 	"context"
+	"net"
 
+	"github.com/sagernet/sing-box/adapter"
+	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
+	aTLS "github.com/sagernet/sing/common/tls"
 )
 
-func NewServer(ctx context.Context, logger log.Logger, options option.InboundTLSOptions) (ServerConfig, error) {
-	return newSTDServer(ctx, logger, options)
+func NewServer(ctx context.Context, router adapter.Router, logger log.Logger, options option.InboundTLSOptions) (ServerConfig, error) {
+	if !options.Enabled {
+		return nil, nil
+	}
+	if options.Reality != nil && options.Reality.Enabled {
+		return NewRealityServer(ctx, router, logger, options)
+	} else {
+		return NewSTDServer(ctx, router, logger, options)
+	}
+}
+
+func ServerHandshake(ctx context.Context, conn net.Conn, config ServerConfig) (Conn, error) {
+	ctx, cancel := context.WithTimeout(ctx, C.TCPTimeout)
+	defer cancel()
+	return aTLS.ServerHandshake(ctx, conn, config)
 }

common/tls/std_client.go

@@ -7,15 +7,44 @@ import (
 	"net/netip"
 	"os"
 
+	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/option"
 	E "github.com/sagernet/sing/common/exceptions"
 )
 
-type stdClientConfig struct {
+type STDClientConfig struct {
 	config *tls.Config
 }
 
-func newStdClient(serverAddress string, options option.OutboundTLSOptions) (Config, error) {
+func (s *STDClientConfig) ServerName() string {
+	return s.config.ServerName
+}
+
+func (s *STDClientConfig) SetServerName(serverName string) {
+	s.config.ServerName = serverName
+}
+
+func (s *STDClientConfig) NextProtos() []string {
+	return s.config.NextProtos
+}
+
+func (s *STDClientConfig) SetNextProtos(nextProto []string) {
+	s.config.NextProtos = nextProto
+}
+
+func (s *STDClientConfig) Config() (*STDConfig, error) {
+	return s.config, nil
+}
+
+func (s *STDClientConfig) Client(conn net.Conn) (Conn, error) {
+	return tls.Client(conn, s.config), nil
+}
+
+func (s *STDClientConfig) Clone() Config {
+	return &STDClientConfig{s.config.Clone()}
+}
+
+func NewSTDClient(router adapter.Router, serverAddress string, options option.OutboundTLSOptions) (Config, error) {
 	var serverName string
 	if options.ServerName != "" {
 		serverName = options.ServerName
@@ -29,6 +58,7 @@ func newStdClient(serverAddress string, options option.OutboundTLSOptions) (Conf
 	}
 
 	var tlsConfig tls.Config
+	tlsConfig.Time = router.TimeFunc()
 	if options.DisableSNI {
 		tlsConfig.ServerName = "127.0.0.1"
 	} else {
@@ -96,21 +126,5 @@ func newStdClient(serverAddress string, options option.OutboundTLSOptions) (Conf
 		}
 		tlsConfig.RootCAs = certPool
 	}
-	return &stdClientConfig{&tlsConfig}, nil
-}
-
-func (s *stdClientConfig) NextProtos() []string {
-	return s.config.NextProtos
-}
-
-func (s *stdClientConfig) SetNextProtos(nextProto []string) {
-	s.config.NextProtos = nextProto
-}
-
-func (s *stdClientConfig) Config() (*STDConfig, error) {
-	return s.config, nil
-}
-
-func (s *stdClientConfig) Client(conn net.Conn) Conn {
-	return tls.Client(conn, s.config)
+	return &STDClientConfig{&tlsConfig}, nil
 }

common/tls/std_server.go

@@ -15,6 +15,8 @@ import (
 	"github.com/fsnotify/fsnotify"
 )
 
+var errInsecureUnused = E.New("tls: insecure unused")
+
 type STDServerConfig struct {
 	config          *tls.Config
 	logger          log.Logger
@@ -26,6 +28,14 @@ type STDServerConfig struct {
 	watcher         *fsnotify.Watcher
 }
 
+func (c *STDServerConfig) ServerName() string {
+	return c.config.ServerName
+}
+
+func (c *STDServerConfig) SetServerName(serverName string) {
+	c.config.ServerName = serverName
+}
+
 func (c *STDServerConfig) NextProtos() []string {
 	return c.config.NextProtos
 }
@@ -34,107 +44,22 @@ func (c *STDServerConfig) SetNextProtos(nextProto []string) {
 	c.config.NextProtos = nextProto
 }
 
-func newSTDServer(ctx context.Context, logger log.Logger, options option.InboundTLSOptions) (ServerConfig, error) {
-	if !options.Enabled {
-		return nil, nil
-	}
-	var tlsConfig *tls.Config
-	var acmeService adapter.Service
-	var err error
-	if options.ACME != nil && len(options.ACME.Domain) > 0 {
-		tlsConfig, acmeService, err = startACME(ctx, common.PtrValueOrDefault(options.ACME))
-		if err != nil {
-			return nil, err
-		}
-	} else {
-		tlsConfig = &tls.Config{}
-	}
-	if options.ServerName != "" {
-		tlsConfig.ServerName = options.ServerName
-	}
-	if len(options.ALPN) > 0 {
-		tlsConfig.NextProtos = append(tlsConfig.NextProtos, options.ALPN...)
-	}
-	if options.MinVersion != "" {
-		minVersion, err := ParseTLSVersion(options.MinVersion)
-		if err != nil {
-			return nil, E.Cause(err, "parse min_version")
-		}
-		tlsConfig.MinVersion = minVersion
-	}
-	if options.MaxVersion != "" {
-		maxVersion, err := ParseTLSVersion(options.MaxVersion)
-		if err != nil {
-			return nil, E.Cause(err, "parse max_version")
-		}
-		tlsConfig.MaxVersion = maxVersion
-	}
-	if options.CipherSuites != nil {
-	find:
-		for _, cipherSuite := range options.CipherSuites {
-			for _, tlsCipherSuite := range tls.CipherSuites() {
-				if cipherSuite == tlsCipherSuite.Name {
-					tlsConfig.CipherSuites = append(tlsConfig.CipherSuites, tlsCipherSuite.ID)
-					continue find
-				}
-			}
-			return nil, E.New("unknown cipher_suite: ", cipherSuite)
-		}
-	}
-	var certificate []byte
-	var key []byte
-	if acmeService == nil {
-		if options.Certificate != "" {
-			certificate = []byte(options.Certificate)
-		} else if options.CertificatePath != "" {
-			content, err := os.ReadFile(options.CertificatePath)
-			if err != nil {
-				return nil, E.Cause(err, "read certificate")
-			}
-			certificate = content
-		}
-		if options.Key != "" {
-			key = []byte(options.Key)
-		} else if options.KeyPath != "" {
-			content, err := os.ReadFile(options.KeyPath)
-			if err != nil {
-				return nil, E.Cause(err, "read key")
-			}
-			key = content
-		}
-		if certificate == nil {
-			return nil, E.New("missing certificate")
-		}
-		if key == nil {
-			return nil, E.New("missing key")
-		}
-		keyPair, err := tls.X509KeyPair(certificate, key)
-		if err != nil {
-			return nil, E.Cause(err, "parse x509 key pair")
-		}
-		tlsConfig.Certificates = []tls.Certificate{keyPair}
-	}
-	return &STDServerConfig{
-		config:          tlsConfig,
-		logger:          logger,
-		acmeService:     acmeService,
-		certificate:     certificate,
-		key:             key,
-		certificatePath: options.CertificatePath,
-		keyPath:         options.KeyPath,
-	}, nil
-}
-
 func (c *STDServerConfig) Config() (*STDConfig, error) {
 	return c.config, nil
 }
 
-func (c *STDServerConfig) Client(conn net.Conn) Conn {
-	return tls.Client(conn, c.config)
+func (c *STDServerConfig) Client(conn net.Conn) (Conn, error) {
+	return tls.Client(conn, c.config), nil
 }
 
-func (c *STDServerConfig) Server(conn net.Conn) Conn {
-	return tls.Server(conn, c.config)
+func (c *STDServerConfig) Server(conn net.Conn) (Conn, error) {
+	return tls.Server(conn, c.config), nil
+}
+
+func (c *STDServerConfig) Clone() Config {
+	return &STDServerConfig{
+		config: c.config.Clone(),
+	}
 }
 
 func (c *STDServerConfig) Start() error {
@@ -230,3 +155,105 @@ func (c *STDServerConfig) Close() error {
 	}
 	return nil
 }
+
+func NewSTDServer(ctx context.Context, router adapter.Router, logger log.Logger, options option.InboundTLSOptions) (ServerConfig, error) {
+	if !options.Enabled {
+		return nil, nil
+	}
+	var tlsConfig *tls.Config
+	var acmeService adapter.Service
+	var err error
+	if options.ACME != nil && len(options.ACME.Domain) > 0 {
+		tlsConfig, acmeService, err = startACME(ctx, common.PtrValueOrDefault(options.ACME))
+		//nolint:staticcheck
+		if err != nil {
+			return nil, err
+		}
+		if options.Insecure {
+			return nil, errInsecureUnused
+		}
+	} else {
+		tlsConfig = &tls.Config{}
+	}
+	tlsConfig.Time = router.TimeFunc()
+	if options.ServerName != "" {
+		tlsConfig.ServerName = options.ServerName
+	}
+	if len(options.ALPN) > 0 {
+		tlsConfig.NextProtos = append(options.ALPN, tlsConfig.NextProtos...)
+	}
+	if options.MinVersion != "" {
+		minVersion, err := ParseTLSVersion(options.MinVersion)
+		if err != nil {
+			return nil, E.Cause(err, "parse min_version")
+		}
+		tlsConfig.MinVersion = minVersion
+	}
+	if options.MaxVersion != "" {
+		maxVersion, err := ParseTLSVersion(options.MaxVersion)
+		if err != nil {
+			return nil, E.Cause(err, "parse max_version")
+		}
+		tlsConfig.MaxVersion = maxVersion
+	}
+	if options.CipherSuites != nil {
+	find:
+		for _, cipherSuite := range options.CipherSuites {
+			for _, tlsCipherSuite := range tls.CipherSuites() {
+				if cipherSuite == tlsCipherSuite.Name {
+					tlsConfig.CipherSuites = append(tlsConfig.CipherSuites, tlsCipherSuite.ID)
+					continue find
+				}
+			}
+			return nil, E.New("unknown cipher_suite: ", cipherSuite)
+		}
+	}
+	var certificate []byte
+	var key []byte
+	if acmeService == nil {
+		if options.Certificate != "" {
+			certificate = []byte(options.Certificate)
+		} else if options.CertificatePath != "" {
+			content, err := os.ReadFile(options.CertificatePath)
+			if err != nil {
+				return nil, E.Cause(err, "read certificate")
+			}
+			certificate = content
+		}
+		if options.Key != "" {
+			key = []byte(options.Key)
+		} else if options.KeyPath != "" {
+			content, err := os.ReadFile(options.KeyPath)
+			if err != nil {
+				return nil, E.Cause(err, "read key")
+			}
+			key = content
+		}
+		if certificate == nil && key == nil && options.Insecure {
+			tlsConfig.GetCertificate = func(info *tls.ClientHelloInfo) (*tls.Certificate, error) {
+				return GenerateKeyPair(router.TimeFunc(), info.ServerName)
+			}
+		} else {
+			if certificate == nil {
+				return nil, E.New("missing certificate")
+			} else if key == nil {
+				return nil, E.New("missing key")
+			}
+
+			keyPair, err := tls.X509KeyPair(certificate, key)
+			if err != nil {
+				return nil, E.Cause(err, "parse x509 key pair")
+			}
+			tlsConfig.Certificates = []tls.Certificate{keyPair}
+		}
+	}
+	return &STDServerConfig{
+		config:          tlsConfig,
+		logger:          logger,
+		acmeService:     acmeService,
+		certificate:     certificate,
+		key:             key,
+		certificatePath: options.CertificatePath,
+		keyPath:         options.KeyPath,
+	}, nil
+}