release: Refactor release tracks for Linux packages and Docker

Support 4 release tracks instead of 2:
- sing-box / latest (stable release)
- sing-box-beta / latest-beta (stable pre-release)
- sing-box-testing / latest-testing (testing branch)
- sing-box-oldstable / latest-oldstable (oldstable branch)

Track is detected via git branch --contains and git tag,
replacing the old version-string hyphen check.

.fpm_pacman

@@ -0,0 +1,23 @@
+-s dir
+--name sing-box
+--category net
+--license GPL-3.0-or-later
+--description "The universal proxy platform."
+--url "https://sing-box.sagernet.org/"
+--maintainer "nekohasekai <contact-git@sekai.icu>"
+--config-files etc/sing-box/config.json
+--after-install release/config/sing-box.postinst
+
+release/config/config.json=/etc/sing-box/config.json
+
+release/config/sing-box.service=/usr/lib/systemd/system/sing-box.service
+release/config/sing-box@.service=/usr/lib/systemd/system/sing-box@.service
+release/config/sing-box.sysusers=/usr/lib/sysusers.d/sing-box.conf
+release/config/sing-box.rules=usr/share/polkit-1/rules.d/sing-box.rules
+release/config/sing-box-split-dns.xml=/usr/share/dbus-1/system.d/sing-box-split-dns.conf
+
+release/completions/sing-box.bash=/usr/share/bash-completion/completions/sing-box.bash
+release/completions/sing-box.fish=/usr/share/fish/vendor_completions.d/sing-box.fish
+release/completions/sing-box.zsh=/usr/share/zsh/site-functions/_sing-box
+
+LICENSE=/usr/share/licenses/sing-box/LICENSE

.fpm_systemd

@@ -8,6 +8,7 @@
 --deb-field "Bug: https://github.com/SagerNet/sing-box/issues"
 --no-deb-generate-changes
 --config-files /etc/sing-box/config.json
+--after-install release/config/sing-box.postinst
 
 release/config/config.json=/etc/sing-box/config.json
 

.github/detect_track.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+branches=$(git branch -r --contains HEAD)
+if echo "$branches" | grep -q 'origin/stable'; then
+  track=stable
+elif echo "$branches" | grep -q 'origin/testing'; then
+  track=testing
+elif echo "$branches" | grep -q 'origin/oldstable'; then
+  track=oldstable
+else
+  echo "ERROR: HEAD is not on any known release branch (stable/testing/oldstable)" >&2
+  exit 1
+fi
+
+if [[ "$track" == "stable" ]]; then
+  tag=$(git describe --tags --exact-match HEAD 2>/dev/null || true)
+  if [[ -n "$tag" && "$tag" == *"-"* ]]; then
+    track=beta
+  fi
+fi
+
+case "$track" in
+  stable)    name=sing-box;           docker_tag=latest ;;
+  beta)      name=sing-box-beta;      docker_tag=latest-beta ;;
+  testing)   name=sing-box-testing;   docker_tag=latest-testing ;;
+  oldstable) name=sing-box-oldstable; docker_tag=latest-oldstable ;;
+esac
+
+echo "track=${track} name=${name} docker_tag=${docker_tag}" >&2
+echo "TRACK=${track}" >> "$GITHUB_ENV"
+echo "NAME=${name}" >> "$GITHUB_ENV"
+echo "DOCKER_TAG=${docker_tag}" >> "$GITHUB_ENV"

.github/setup_go_for_windows7.sh

@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+VERSION="1.25.8"
+PATCH_COMMITS=(
+  "466f6c7a29bc098b0d4c987b803c779222894a11"
+  "1bdabae205052afe1dadb2ad6f1ba612cdbc532a"
+  "a90777dcf692dd2168577853ba743b4338721b06"
+  "f6bddda4e8ff58a957462a1a09562924d5f3d05c"
+  "bed309eff415bcb3c77dd4bc3277b682b89a388d"
+  "34b899c2fb39b092db4fa67c4417e41dc046be4b"
+)
+CURL_ARGS=(
+  -fL
+  --silent
+  --show-error
+)
+
+if [[ -n "${GITHUB_TOKEN:-}" ]]; then
+  CURL_ARGS+=(-H "Authorization: Bearer ${GITHUB_TOKEN}")
+fi
+
+mkdir -p "$HOME/go"
+cd "$HOME/go"
+wget "https://dl.google.com/go/go${VERSION}.linux-amd64.tar.gz"
+tar -xzf "go${VERSION}.linux-amd64.tar.gz"
+mv go go_win7
+cd go_win7
+
+# modify from https://github.com/restic/restic/issues/4636#issuecomment-1896455557
+# these patch URLs only work on golang1.25.x
+# that means after golang1.26 release it must be changed
+# see: https://github.com/MetaCubeX/go/commits/release-branch.go1.25/
+# revert:
+# 693def151adff1af707d82d28f55dba81ceb08e1: "crypto/rand,runtime: switch RtlGenRandom for ProcessPrng"
+# 7c1157f9544922e96945196b47b95664b1e39108: "net: remove sysSocket fallback for Windows 7"
+# 48042aa09c2f878c4faa576948b07fe625c4707a: "syscall: remove Windows 7 console handle workaround"
+# a17d959debdb04cd550016a3501dd09d50cd62e7: "runtime: always use LoadLibraryEx to load system libraries"
+# fixes:
+# bed309eff415bcb3c77dd4bc3277b682b89a388d: "Fix os.RemoveAll not working on Windows7"
+# 34b899c2fb39b092db4fa67c4417e41dc046be4b: "Revert \"os: remove 5ms sleep on Windows in (*Process).Wait\""
+
+for patch_commit in "${PATCH_COMMITS[@]}"; do
+  curl "${CURL_ARGS[@]}" "https://github.com/MetaCubeX/go/commit/${patch_commit}.diff" | patch --verbose -p 1
+done

.github/setup_legacy_go.sh

@@ -1,25 +0,0 @@
-#!/usr/bin/env bash
-
-VERSION="1.23.6"
-
-mkdir -p $HOME/go
-cd $HOME/go
-wget "https://dl.google.com/go/go${VERSION}.linux-amd64.tar.gz"
-tar -xzf "go${VERSION}.linux-amd64.tar.gz"
-mv go go_legacy
-cd go_legacy
-
-# modify from https://github.com/restic/restic/issues/4636#issuecomment-1896455557
-# this patch file only works on golang1.23.x
-# that means after golang1.24 release it must be changed
-# see: https://github.com/MetaCubeX/go/commits/release-branch.go1.23/
-# revert:
-# 693def151adff1af707d82d28f55dba81ceb08e1: "crypto/rand,runtime: switch RtlGenRandom for ProcessPrng"
-# 7c1157f9544922e96945196b47b95664b1e39108: "net: remove sysSocket fallback for Windows 7"
-# 48042aa09c2f878c4faa576948b07fe625c4707a: "syscall: remove Windows 7 console handle workaround"
-# a17d959debdb04cd550016a3501dd09d50cd62e7: "runtime: always use LoadLibraryEx to load system libraries"
-
-curl https://github.com/MetaCubeX/go/commit/9ac42137ef6730e8b7daca016ece831297a1d75b.diff | patch --verbose -p 1
-curl https://github.com/MetaCubeX/go/commit/21290de8a4c91408de7c2b5b68757b1e90af49dd.diff | patch --verbose -p 1
-curl https://github.com/MetaCubeX/go/commit/6a31d3fa8e47ddabc10bd97bff10d9a85f4cfb76.diff | patch --verbose -p 1
-curl https://github.com/MetaCubeX/go/commit/69e2eed6dd0f6d815ebf15797761c13f31213dd6.diff | patch --verbose -p 1

.github/workflows/build.yml

@@ -25,8 +25,7 @@ on:
           - publish-android
   push:
     branches:
-      - main-next
-      - dev-next
+      - oldstable
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name }}-${{ inputs.build }}
@@ -40,13 +39,13 @@ jobs:
       version: ${{ steps.outputs.outputs.version }}
     steps:
       - name: Checkout
-        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: ^1.24.3
+          go-version: ~1.25.8
       - name: Check input version
         if: github.event_name == 'workflow_dispatch'
         run: |-
@@ -88,13 +87,14 @@ jobs:
           - { os: linux, arch: loong64, debian: loongarch64, rpm: loongarch64, openwrt: "loongarch64_generic" }
 
           - { os: windows, arch: amd64 }
-          - { os: windows, arch: amd64, legacy_go: true }
+          - { os: windows, arch: amd64, legacy_win7: true, legacy_name: "windows-7" }
           - { os: windows, arch: "386" }
-          - { os: windows, arch: "386", legacy_go: true }
+          - { os: windows, arch: "386", legacy_win7: true, legacy_name: "windows-7" }
           - { os: windows, arch: arm64 }
 
           - { os: darwin, arch: amd64 }
           - { os: darwin, arch: arm64 }
+          - { os: darwin, arch: amd64, legacy_go124: true, legacy_name: "macos-11" }
 
           - { os: android, arch: arm64, ndk: "aarch64-linux-android21" }
           - { os: android, arch: arm, ndk: "armv7a-linux-androideabi21" }
@@ -102,31 +102,36 @@ jobs:
           - { os: android, arch: "386", ndk: "i686-linux-android21" }
     steps:
       - name: Checkout
-        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
       - name: Setup Go
-        if: ${{ ! matrix.legacy_go }}
+        if: ${{ ! (matrix.legacy_win7 || matrix.legacy_go124) }}
         uses: actions/setup-go@v5
         with:
-          go-version: ^1.24.3
-      - name: Cache Legacy Go
-        if: matrix.require_legacy_go
-        id: cache-legacy-go
+          go-version: ~1.25.8
+      - name: Setup Go 1.24
+        if: matrix.legacy_go124
+        uses: actions/setup-go@v5
+        with:
+          go-version: ~1.24.10
+      - name: Cache Go for Windows 7
+        if: matrix.legacy_win7
+        id: cache-go-for-windows7
         uses: actions/cache@v4
         with:
           path: |
-            ~/go/go_legacy
-          key: go_legacy_1236
-      - name: Setup Legacy Go
-        if: matrix.legacy_go && steps.cache-legacy-go.outputs.cache-hit != 'true'
+            ~/go/go_win7
+          key: go_win7_1255
+      - name: Setup Go for Windows 7
+        if: matrix.legacy_win7 && steps.cache-go-for-windows7.outputs.cache-hit != 'true'
         run: |-
-          .github/setup_legacy_go.sh
-      - name: Setup Legacy Go 2
-        if: matrix.legacy_go
+          .github/setup_go_for_windows7.sh
+      - name: Setup Go for Windows 7
+        if: matrix.legacy_win7
         run: |-
-          echo "PATH=$HOME/go/go_legacy/bin:$PATH" >> $GITHUB_ENV
-          echo "GOROOT=$HOME/go/go_legacy" >> $GITHUB_ENV
+          echo "PATH=$HOME/go/go_win7/bin:$PATH" >> $GITHUB_ENV
+          echo "GOROOT=$HOME/go/go_win7" >> $GITHUB_ENV
       - name: Setup Android NDK
         if: matrix.os == 'android'
         uses: nttld/setup-ndk@v1
@@ -184,8 +189,8 @@ jobs:
             DIR_NAME="${DIR_NAME}-${{ matrix.go386 }}"
           elif [[ -n "${{ matrix.gomips }}" && "${{ matrix.gomips }}" != 'hardfloat' ]]; then
             DIR_NAME="${DIR_NAME}-${{ matrix.gomips }}"
-          elif [[ "${{ matrix.legacy_go }}" == 'true' ]]; then
-            DIR_NAME="${DIR_NAME}-legacy"
+          elif [[ -n "${{ matrix.legacy_name }}" ]]; then
+            DIR_NAME="${DIR_NAME}-legacy-${{ matrix.legacy_name }}"
           fi
           echo "DIR_NAME=${DIR_NAME}" >> "${GITHUB_ENV}"
           PKG_VERSION="${{ needs.calculate_version.outputs.version }}"
@@ -237,7 +242,7 @@ jobs:
           sudo gem install fpm
           sudo apt-get update
           sudo apt-get install -y libarchive-tools
-          cp .fpm_systemd .fpm
+          cp .fpm_pacman .fpm
           fpm -t pacman \
             -v "$PKG_VERSION" \
             -p "dist/sing-box_${{ needs.calculate_version.outputs.version }}_${{ matrix.os }}_${{ matrix.pacman }}.pkg.tar.zst" \
@@ -277,24 +282,24 @@ jobs:
       - name: Upload artifact
         uses: actions/upload-artifact@v4
         with:
-          name: binary-${{ matrix.os }}_${{ matrix.arch }}${{ matrix.goarm && format('v{0}', matrix.goarm) }}${{ matrix.go386 && format('_{0}', matrix.go386) }}${{ matrix.gomips && format('_{0}', matrix.gomips) }}${{ matrix.legacy_go && '-legacy' || '' }}
+          name: binary-${{ matrix.os }}_${{ matrix.arch }}${{ matrix.goarm && format('v{0}', matrix.goarm) }}${{ matrix.go386 && format('_{0}', matrix.go386) }}${{ matrix.gomips && format('_{0}', matrix.gomips) }}${{ matrix.legacy_name && format('-legacy-{0}', matrix.legacy_name) }}
           path: "dist"
   build_android:
     name: Build Android
-    if: github.event_name != 'workflow_dispatch' || inputs.build == 'All' || inputs.build == 'Android'
+    if: (github.event_name != 'workflow_dispatch' || inputs.build == 'All' || inputs.build == 'Android') && github.ref != 'refs/heads/oldstable'
     runs-on: ubuntu-latest
     needs:
       - calculate_version
     steps:
       - name: Checkout
-        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
           submodules: 'recursive'
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: ^1.24.3
+          go-version: ~1.25.8
       - name: Setup Android NDK
         id: setup-ndk
         uses: nttld/setup-ndk@v1
@@ -317,12 +322,12 @@ jobs:
           JAVA_HOME: /usr/lib/jvm/java-17-openjdk-amd64
           ANDROID_NDK_HOME: ${{ steps.setup-ndk.outputs.ndk-path }}
       - name: Checkout main branch
-        if: github.ref == 'refs/heads/main-next' && github.event_name != 'workflow_dispatch'
+        if: github.ref == 'refs/heads/stable' && github.event_name != 'workflow_dispatch'
         run: |-
           cd clients/android
           git checkout main
       - name: Checkout dev branch
-        if: github.ref == 'refs/heads/dev-next'
+        if: github.ref == 'refs/heads/testing'
         run: |-
           cd clients/android
           git checkout dev
@@ -361,20 +366,20 @@ jobs:
           path: 'dist'
   publish_android:
     name: Publish Android
-    if: github.event_name == 'workflow_dispatch' && inputs.build == 'publish-android'
+    if: github.event_name == 'workflow_dispatch' && inputs.build == 'publish-android' && github.ref != 'refs/heads/oldstable'
     runs-on: ubuntu-latest
     needs:
       - calculate_version
     steps:
       - name: Checkout
-        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
           submodules: 'recursive'
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: ^1.24.3
+          go-version: ~1.25.8
       - name: Setup Android NDK
         id: setup-ndk
         uses: nttld/setup-ndk@v1
@@ -397,12 +402,12 @@ jobs:
           JAVA_HOME: /usr/lib/jvm/java-17-openjdk-amd64
           ANDROID_NDK_HOME: ${{ steps.setup-ndk.outputs.ndk-path }}
       - name: Checkout main branch
-        if: github.ref == 'refs/heads/main-next' && github.event_name != 'workflow_dispatch'
+        if: github.ref == 'refs/heads/stable' && github.event_name != 'workflow_dispatch'
         run: |-
           cd clients/android
           git checkout main
       - name: Checkout dev branch
-        if: github.ref == 'refs/heads/dev-next'
+        if: github.ref == 'refs/heads/testing'
         run: |-
           cd clients/android
           git checkout dev
@@ -426,7 +431,8 @@ jobs:
           SERVICE_ACCOUNT_CREDENTIALS: ${{ secrets.SERVICE_ACCOUNT_CREDENTIALS }}
   build_apple:
     name: Build Apple clients
-    runs-on: macos-15
+    runs-on: macos-26
+    if: false
     needs:
       - calculate_version
     strategy:
@@ -464,7 +470,7 @@ jobs:
     steps:
       - name: Checkout
         if: matrix.if
-        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
           submodules: 'recursive'
@@ -472,15 +478,7 @@ jobs:
         if: matrix.if
         uses: actions/setup-go@v5
         with:
-          go-version: ^1.24.3
-      - name: Setup Xcode stable
-        if: matrix.if && github.ref == 'refs/heads/main-next'
-        run: |-
-          sudo xcode-select -s /Applications/Xcode_16.2.app
-      - name: Setup Xcode beta
-        if: matrix.if && github.ref == 'refs/heads/dev-next'
-        run: |-
-          sudo xcode-select -s /Applications/Xcode_16.2.app
+          go-version: ~1.25.8
       - name: Set tag
         if: matrix.if
         run: |-
@@ -488,12 +486,12 @@ jobs:
           git tag v${{ needs.calculate_version.outputs.version }} -f
           echo "VERSION=${{ needs.calculate_version.outputs.version }}" >> "$GITHUB_ENV"
       - name: Checkout main branch
-        if: matrix.if && github.ref == 'refs/heads/main-next' && github.event_name != 'workflow_dispatch'
+        if: matrix.if && github.ref == 'refs/heads/stable' && github.event_name != 'workflow_dispatch'
         run: |-
           cd clients/apple
           git checkout main
       - name: Checkout dev branch
-        if: matrix.if && github.ref == 'refs/heads/dev-next'
+        if: matrix.if && github.ref == 'refs/heads/testing'
         run: |-
           cd clients/apple
           git checkout dev
@@ -579,7 +577,7 @@ jobs:
             -authenticationKeyID $ASC_KEY_ID \
             -authenticationKeyIssuerID $ASC_KEY_ISSUER_ID
       - name: Publish to TestFlight
-        if: matrix.if && matrix.name != 'macOS-standalone' && github.event_name == 'workflow_dispatch' && github.ref =='refs/heads/dev-next'
+        if: matrix.if && matrix.name != 'macOS-standalone' && github.event_name == 'workflow_dispatch' && github.ref =='refs/heads/testing'
         run: |-
           go run -v ./cmd/internal/app_store_connect publish_testflight ${{ matrix.platform }}
       - name: Build image
@@ -615,7 +613,7 @@ jobs:
           path: 'dist'
   upload:
     name: Upload builds
-    if: always() && github.event_name == 'workflow_dispatch' && (inputs.build == 'All' || inputs.build == 'Binary' || inputs.build == 'Android' || inputs.build == 'Apple' || inputs.build == 'macOS-standalone')
+    if: "!failure() && github.event_name == 'workflow_dispatch' && (inputs.build == 'All' || inputs.build == 'Binary' || inputs.build == 'Android' || inputs.build == 'Apple' || inputs.build == 'macOS-standalone')"
     runs-on: ubuntu-latest
     needs:
       - calculate_version
@@ -624,7 +622,7 @@ jobs:
       - build_apple
     steps:
       - name: Checkout
-        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
       - name: Cache ghr
@@ -647,7 +645,7 @@ jobs:
           git tag v${{ needs.calculate_version.outputs.version }} -f
           echo "VERSION=${{ needs.calculate_version.outputs.version }}" >> "$GITHUB_ENV"
       - name: Download builds
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           path: dist
           merge-multiple: true

.github/workflows/docker.yml

@@ -39,7 +39,7 @@ jobs:
           echo "ref=$ref"
           echo "ref=$ref" >> $GITHUB_OUTPUT
       - name: Checkout
-        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           ref: ${{ steps.ref.outputs.ref }}
           fetch-depth: 0
@@ -99,15 +99,15 @@ jobs:
           fi
           echo "ref=$ref"
           echo "ref=$ref" >> $GITHUB_OUTPUT
-          if [[ $ref == *"-"* ]]; then
-            latest=latest-beta
-          else
-            latest=latest
-          fi
-          echo "latest=$latest"
-          echo "latest=$latest" >> $GITHUB_OUTPUT
+      - name: Checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
+        with:
+          ref: ${{ steps.ref.outputs.ref }}
+          fetch-depth: 0
+      - name: Detect track
+        run: bash .github/detect_track.sh
       - name: Download digests
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           path: /tmp/digests
           pattern: digests-*
@@ -124,10 +124,10 @@ jobs:
         working-directory: /tmp/digests
         run: |
           docker buildx imagetools create \
-            -t "${{ env.REGISTRY_IMAGE }}:${{ steps.ref.outputs.latest }}" \
+            -t "${{ env.REGISTRY_IMAGE }}:${{ env.DOCKER_TAG }}" \
             -t "${{ env.REGISTRY_IMAGE }}:${{ steps.ref.outputs.ref }}" \
             $(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)
       - name: Inspect image
         run: |
-          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.ref.outputs.latest }}
+          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ env.DOCKER_TAG }}
           docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.ref.outputs.ref }}

.github/workflows/lint.yml

@@ -3,18 +3,20 @@ name: Lint
 on:
   push:
     branches:
-      - stable-next
-      - main-next
-      - dev-next
+      - oldstable
+      - stable
+      - testing
+      - unstable
     paths-ignore:
       - '**.md'
       - '.github/**'
       - '!.github/workflows/lint.yml'
   pull_request:
     branches:
-      - stable-next
-      - main-next
-      - dev-next
+      - oldstable
+      - stable
+      - testing
+      - unstable
 
 jobs:
   build:
@@ -22,15 +24,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: ^1.24.3
+          go-version: ~1.24.10
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v6
+        uses: golangci/golangci-lint-action@v8
         with:
           version: latest
           args: --timeout=30m

.github/workflows/linux.yml

@@ -19,13 +19,13 @@ jobs:
       version: ${{ steps.outputs.outputs.version }}
     steps:
       - name: Checkout
-        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: ^1.24.3
+          go-version: ~1.25.8
       - name: Check input version
         if: github.event_name == 'workflow_dispatch'
         run: |-
@@ -60,13 +60,13 @@ jobs:
           - { os: linux, arch: loong64, debian: loongarch64, rpm: loongarch64 }
     steps:
       - name: Checkout
-        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: ^1.24.3
+          go-version: ~1.25.8
       - name: Setup Android NDK
         if: matrix.os == 'android'
         uses: nttld/setup-ndk@v1
@@ -80,7 +80,7 @@ jobs:
       - name: Set build tags
         run: |
           set -xeuo pipefail
-          TAGS='with_gvisor,with_quic,with_dhcp,with_wireguard,with_utls,with_acme,with_clash_api'
+          TAGS='with_gvisor,with_quic,with_dhcp,with_wireguard,with_utls,with_acme,with_clash_api,with_tailscale'
           echo "BUILD_TAGS=${TAGS}" >> "${GITHUB_ENV}"
       - name: Build
         run: |
@@ -98,14 +98,8 @@ jobs:
       - name: Set mtime
         run: |-
           TZ=UTC touch -t '197001010000' dist/sing-box
-      - name: Set name
-        if: ${{ ! contains(needs.calculate_version.outputs.version, '-') }}
-        run: |-
-          echo "NAME=sing-box" >> "$GITHUB_ENV"
-      - name: Set beta name
-        if: contains(needs.calculate_version.outputs.version, '-')
-        run: |-
-          echo "NAME=sing-box-beta" >> "$GITHUB_ENV"
+      - name: Detect track
+        run: bash .github/detect_track.sh
       - name: Set version
         run: |-
           PKG_VERSION="${{ needs.calculate_version.outputs.version }}"
@@ -166,7 +160,7 @@ jobs:
       - build
     steps:
       - name: Checkout
-        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
       - name: Set tag
@@ -175,7 +169,7 @@ jobs:
           git tag v${{ needs.calculate_version.outputs.version }} -f
           echo "VERSION=${{ needs.calculate_version.outputs.version }}" >> "$GITHUB_ENV"
       - name: Download builds
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
         with:
           path: dist
           merge-multiple: true

.gitignore

@@ -15,4 +15,6 @@
 .DS_Store
 /config.d/
 /venv/
-
+CLAUDE.md
+AGENTS.md
+/.claude/

.golangci.yml

@@ -1,27 +1,6 @@
-linters:
-  disable-all: true
-  enable:
-    - gofumpt
-    - govet
-    - gci
-    - staticcheck
-    - paralleltest
-    - ineffassign
-
-linters-settings:
-  gci:
-    custom-order: true
-    sections:
-      - standard
-      - prefix(github.com/sagernet/)
-      - default
-  staticcheck:
-    checks:
-      - all
-      - -SA1003
-
+version: "2"
 run:
-  go: "1.23"
+  go: "1.24"
   build-tags:
     - with_gvisor
     - with_quic
@@ -30,7 +9,51 @@ run:
     - with_utls
     - with_acme
     - with_clash_api
-
-issues:
-  exclude-dirs:
-    - transport/simple-obfs
+linters:
+  default: none
+  enable:
+    - govet
+    - ineffassign
+    - paralleltest
+    - staticcheck
+  settings:
+    staticcheck:
+      checks:
+        - all
+        - -S1000
+        - -S1008
+        - -S1017
+        - -ST1003
+        - -QF1001
+        - -QF1003
+        - -QF1008
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    paths:
+      - transport/simple-obfs
+      - third_party$
+      - builtin$
+      - examples$
+formatters:
+  enable:
+    - gci
+    - gofumpt
+  settings:
+    gci:
+      sections:
+        - standard
+        - prefix(github.com/sagernet/)
+        - default
+      custom-order: true
+  exclusions:
+    generated: lax
+    paths:
+      - transport/simple-obfs
+      - third_party$
+      - builtin$
+      - examples$

Dockerfile

@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM golang:1.24-alpine AS builder
+FROM --platform=$BUILDPLATFORM golang:1.25-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
@@ -20,8 +20,6 @@ RUN set -ex \
 FROM --platform=$TARGETPLATFORM alpine AS dist
 LABEL maintainer="nekohasekai <contact-git@sekai.icu>"
 RUN set -ex \
-    && apk upgrade \
-    && apk add bash tzdata ca-certificates nftables \
-    && rm -rf /var/cache/apk/*
+    && apk add --no-cache --upgrade bash tzdata ca-certificates nftables
 COPY --from=builder /go/bin/sing-box /usr/local/bin/sing-box
 ENTRYPOINT ["sing-box"]

Makefile

@@ -17,6 +17,10 @@ build:
 	export GOTOOLCHAIN=local && \
 	go build $(MAIN_PARAMS) $(MAIN)
 
+race:
+	export GOTOOLCHAIN=local && \
+	go build -race $(MAIN_PARAMS) $(MAIN)
+
 ci_build:
 	export GOTOOLCHAIN=local && \
 	go build $(PARAMS) $(MAIN) && \
@@ -45,7 +49,7 @@ lint:
 	GOOS=freebsd golangci-lint run ./...
 
 lint_install:
-	go install -v github.com/golangci/golangci-lint/cmd/golangci-lint@latest
+	go install -v github.com/golangci/golangci-lint/v2/cmd/golangci-lint@latest
 
 proto:
 	@go run ./cmd/internal/protogen
@@ -108,6 +112,16 @@ upload_ios_app_store:
 	cd ../sing-box-for-apple && \
 	xcodebuild -exportArchive -archivePath build/SFI.xcarchive -exportOptionsPlist SFI/Upload.plist -allowProvisioningUpdates
 
+export_ios_ipa:
+	cd ../sing-box-for-apple && \
+	xcodebuild -exportArchive -archivePath build/SFI.xcarchive -exportOptionsPlist SFI/Export.plist -allowProvisioningUpdates -exportPath build/SFI && \
+	cp build/SFI/sing-box.ipa dist/SFI.ipa
+
+upload_ios_ipa:
+	cd dist && \
+	cp SFI.ipa "SFI-${VERSION}.ipa" && \
+	ghr --replace --draft --prerelease "v${VERSION}" "SFI-${VERSION}.ipa"
+
 release_ios: build_ios upload_ios_app_store
 
 build_macos:
@@ -175,6 +189,16 @@ upload_tvos_app_store:
 	cd ../sing-box-for-apple && \
 	xcodebuild -exportArchive -archivePath "build/SFT.xcarchive" -exportOptionsPlist SFI/Upload.plist -allowProvisioningUpdates
 
+export_tvos_ipa:
+	cd ../sing-box-for-apple && \
+	xcodebuild -exportArchive -archivePath "build/SFT.xcarchive" -exportOptionsPlist SFI/Export.plist -allowProvisioningUpdates -exportPath build/SFT && \
+	cp build/SFT/sing-box.ipa dist/SFT.ipa
+
+upload_tvos_ipa:
+	cd dist && \
+	cp SFT.ipa "SFT-${VERSION}.ipa" && \
+	ghr --replace --draft --prerelease "v${VERSION}" "SFT-${VERSION}.ipa"
+
 release_tvos: build_tvos upload_tvos_app_store
 
 update_apple_version:
@@ -225,8 +249,8 @@ lib:
 	go run ./cmd/internal/build_libbox -target ios
 
 lib_install:
-	go install -v github.com/sagernet/gomobile/cmd/gomobile@v0.1.6
-	go install -v github.com/sagernet/gomobile/cmd/gobind@v0.1.6
+	go install -v github.com/sagernet/gomobile/cmd/gomobile@v0.1.8
+	go install -v github.com/sagernet/gomobile/cmd/gobind@v0.1.8
 
 docs:
 	venv/bin/mkdocs serve

README.md

@@ -1,3 +1,11 @@
+> Sponsored by [Warp](https://go.warp.dev/sing-box), built for coding with multiple AI agents
+
+<a href="https://go.warp.dev/sing-box">
+<img alt="Warp sponsorship" width="400" src="https://github.com/warpdotdev/brand-assets/raw/refs/heads/main/Github/Sponsor/Warp-Github-LG-02.png">
+</a>
+
+---
+
 # sing-box
 
 The universal proxy platform.

adapter/dns.go

@@ -27,8 +27,6 @@ type DNSClient interface {
 	Start()
 	Exchange(ctx context.Context, transport DNSTransport, message *dns.Msg, options DNSQueryOptions, responseChecker func(responseAddrs []netip.Addr) bool) (*dns.Msg, error)
 	Lookup(ctx context.Context, transport DNSTransport, domain string, options DNSQueryOptions, responseChecker func(responseAddrs []netip.Addr) bool) ([]netip.Addr, error)
-	LookupCache(domain string, strategy C.DomainStrategy) ([]netip.Addr, bool)
-	ExchangeCache(ctx context.Context, message *dns.Msg) (*dns.Msg, bool)
 	ClearCache()
 }
 

adapter/inbound.go

@@ -53,11 +53,12 @@ type InboundContext struct {
 
 	// sniffer
 
-	Protocol         string
-	Domain           string
-	Client           string
-	SniffContext     any
-	PacketSniffError error
+	Protocol     string
+	Domain       string
+	Client       string
+	SniffContext any
+	SnifferNames []string
+	SniffError   error
 
 	// cache
 
@@ -135,8 +136,7 @@ func ExtendContext(ctx context.Context) (context.Context, *InboundContext) {
 
 func OverrideContext(ctx context.Context) context.Context {
 	if metadata := ContextFrom(ctx); metadata != nil {
-		var newMetadata InboundContext
-		newMetadata = *metadata
+		newMetadata := *metadata
 		return WithContext(ctx, &newMetadata)
 	}
 	return ctx

adapter/network.go

@@ -20,6 +20,7 @@ type NetworkManager interface {
 	DefaultOptions() NetworkOptions
 	RegisterAutoRedirectOutputMark(mark uint32) error
 	AutoRedirectOutputMark() uint32
+	AutoRedirectOutputMarkFunc() control.Func
 	NetworkMonitor() tun.NetworkUpdateMonitor
 	InterfaceMonitor() tun.DefaultInterfaceMonitor
 	PackageManager() tun.PackageManager

adapter/outbound/manager.go

@@ -30,7 +30,7 @@ type Manager struct {
 	outboundByTag           map[string]adapter.Outbound
 	dependByTag             map[string][]string
 	defaultOutbound         adapter.Outbound
-	defaultOutboundFallback adapter.Outbound
+	defaultOutboundFallback func() (adapter.Outbound, error)
 }
 
 func NewManager(logger logger.ContextLogger, registry adapter.OutboundRegistry, endpoint adapter.EndpointManager, defaultTag string) *Manager {
@@ -44,7 +44,7 @@ func NewManager(logger logger.ContextLogger, registry adapter.OutboundRegistry,
 	}
 }
 
-func (m *Manager) Initialize(defaultOutboundFallback adapter.Outbound) {
+func (m *Manager) Initialize(defaultOutboundFallback func() (adapter.Outbound, error)) {
 	m.defaultOutboundFallback = defaultOutboundFallback
 }
 
@@ -55,18 +55,31 @@ func (m *Manager) Start(stage adapter.StartStage) error {
 	}
 	m.started = true
 	m.stage = stage
-	outbounds := m.outbounds
-	m.access.Unlock()
 	if stage == adapter.StartStateStart {
 		if m.defaultTag != "" && m.defaultOutbound == nil {
 			defaultEndpoint, loaded := m.endpoint.Get(m.defaultTag)
 			if !loaded {
+				m.access.Unlock()
 				return E.New("default outbound not found: ", m.defaultTag)
 			}
 			m.defaultOutbound = defaultEndpoint
 		}
+		if m.defaultOutbound == nil {
+			directOutbound, err := m.defaultOutboundFallback()
+			if err != nil {
+				m.access.Unlock()
+				return E.Cause(err, "create direct outbound for fallback")
+			}
+			m.outbounds = append(m.outbounds, directOutbound)
+			m.outboundByTag[directOutbound.Tag()] = directOutbound
+			m.defaultOutbound = directOutbound
+		}
+		outbounds := m.outbounds
+		m.access.Unlock()
 		return m.startOutbounds(append(outbounds, common.Map(m.endpoint.Endpoints(), func(it adapter.Endpoint) adapter.Outbound { return it })...))
 	} else {
+		outbounds := m.outbounds
+		m.access.Unlock()
 		for _, outbound := range outbounds {
 			err := adapter.LegacyStart(outbound, stage)
 			if err != nil {
@@ -187,11 +200,7 @@ func (m *Manager) Outbound(tag string) (adapter.Outbound, bool) {
 func (m *Manager) Default() adapter.Outbound {
 	m.access.RLock()
 	defer m.access.RUnlock()
-	if m.defaultOutbound != nil {
-		return m.defaultOutbound
-	} else {
-		return m.defaultOutboundFallback
-	}
+	return m.defaultOutbound
 }
 
 func (m *Manager) Remove(tag string) error {

adapter/upstream.go

@@ -73,7 +73,7 @@ func NewUpstreamContextHandlerEx(
 }
 
 func (w *myUpstreamContextHandlerWrapperEx) NewConnectionEx(ctx context.Context, conn net.Conn, source M.Socksaddr, destination M.Socksaddr, onClose N.CloseHandlerFunc) {
-	myMetadata := ContextFrom(ctx)
+	_, myMetadata := ExtendContext(ctx)
 	if source.IsValid() {
 		myMetadata.Source = source
 	}
@@ -84,7 +84,7 @@ func (w *myUpstreamContextHandlerWrapperEx) NewConnectionEx(ctx context.Context,
 }
 
 func (w *myUpstreamContextHandlerWrapperEx) NewPacketConnectionEx(ctx context.Context, conn N.PacketConn, source M.Socksaddr, destination M.Socksaddr, onClose N.CloseHandlerFunc) {
-	myMetadata := ContextFrom(ctx)
+	_, myMetadata := ExtendContext(ctx)
 	if source.IsValid() {
 		myMetadata.Source = source
 	}
@@ -146,7 +146,7 @@ type routeContextHandlerWrapperEx struct {
 }
 
 func (r *routeContextHandlerWrapperEx) NewConnectionEx(ctx context.Context, conn net.Conn, source M.Socksaddr, destination M.Socksaddr, onClose N.CloseHandlerFunc) {
-	metadata := ContextFrom(ctx)
+	_, metadata := ExtendContext(ctx)
 	if source.IsValid() {
 		metadata.Source = source
 	}
@@ -157,7 +157,7 @@ func (r *routeContextHandlerWrapperEx) NewConnectionEx(ctx context.Context, conn
 }
 
 func (r *routeContextHandlerWrapperEx) NewPacketConnectionEx(ctx context.Context, conn N.PacketConn, source M.Socksaddr, destination M.Socksaddr, onClose N.CloseHandlerFunc) {
-	metadata := ContextFrom(ctx)
+	_, metadata := ExtendContext(ctx)
 	if source.IsValid() {
 		metadata.Source = source
 	}

adapter/upstream_legacy.go

@@ -78,8 +78,8 @@ func (w *myUpstreamHandlerWrapper) NewError(ctx context.Context, err error) {
 // Deprecated: removed
 func UpstreamMetadata(metadata InboundContext) M.Metadata {
 	return M.Metadata{
-		Source:      metadata.Source,
-		Destination: metadata.Destination,
+		Source:      metadata.Source.Unwrap(),
+		Destination: metadata.Destination.Unwrap(),
 	}
 }
 

box.go

@@ -314,15 +314,15 @@ func New(options Options) (*Box, error) {
 			return nil, E.Cause(err, "initialize service[", i, "]")
 		}
 	}
-	outboundManager.Initialize(common.Must1(
-		direct.NewOutbound(
+	outboundManager.Initialize(func() (adapter.Outbound, error) {
+		return direct.NewOutbound(
 			ctx,
 			router,
 			logFactory.NewLogger("outbound/direct"),
 			"direct",
 			option.DirectOutboundOptions{},
-		),
-	))
+		)
+	})
 	dnsTransportManager.Initialize(common.Must1(
 		local.NewTransport(
 			ctx,
@@ -498,7 +498,7 @@ func (s *Box) Close() error {
 		close(s.done)
 	}
 	err := common.Close(
-		s.inbound, s.outbound, s.endpoint, s.router, s.connection, s.dnsRouter, s.dnsTransport, s.network,
+		s.service, s.endpoint, s.inbound, s.outbound, s.router, s.connection, s.dnsRouter, s.dnsTransport, s.network,
 	)
 	for _, lifecycleService := range s.internalService {
 		err = E.Append(err, lifecycleService.Close(), func(err error) error {

cmd/internal/app_store_connect/main.go

@@ -105,7 +105,7 @@ func publishTestflight(ctx context.Context) error {
 		return err
 	}
 	tag := tagVersion.VersionString()
-	client := createClient(10 * time.Minute)
+	client := createClient(20 * time.Minute)
 
 	log.Info(tag, " list build IDs")
 	buildIDsResponse, _, err := client.TestFlight.ListBuildIDsForBetaGroup(ctx, groupID, nil)
@@ -134,6 +134,7 @@ func publishTestflight(ctx context.Context) error {
 			asc.PlatformTVOS,
 		}
 	}
+	waitingForProcess := false
 	for _, platform := range platforms {
 		log.Info(string(platform), " list builds")
 		for {
@@ -145,12 +146,13 @@ func publishTestflight(ctx context.Context) error {
 				return err
 			}
 			build := builds.Data[0]
-			if common.Contains(buildIDs, build.ID) || time.Since(build.Attributes.UploadedDate.Time) > 5*time.Minute {
+			if !waitingForProcess && (common.Contains(buildIDs, build.ID) || time.Since(build.Attributes.UploadedDate.Time) > 30*time.Minute) {
 				log.Info(string(platform), " ", tag, " waiting for process")
 				time.Sleep(15 * time.Second)
 				continue
 			}
 			if *build.Attributes.ProcessingState != "VALID" {
+				waitingForProcess = true
 				log.Info(string(platform), " ", tag, " waiting for process: ", *build.Attributes.ProcessingState)
 				time.Sleep(15 * time.Second)
 				continue
@@ -177,7 +179,7 @@ func publishTestflight(ctx context.Context) error {
 			}
 			log.Info(string(platform), " ", tag, " publish")
 			response, err := client.TestFlight.AddBuildsToBetaGroup(ctx, groupID, []string{build.ID})
-			if response != nil && response.StatusCode == http.StatusUnprocessableEntity {
+			if response != nil && (response.StatusCode == http.StatusUnprocessableEntity || response.StatusCode == http.StatusNotFound) {
 				log.Info("waiting for process")
 				time.Sleep(15 * time.Second)
 				continue

cmd/internal/build_libbox/main.go

@@ -16,15 +16,17 @@ import (
 )
 
 var (
-	debugEnabled bool
-	target       string
-	platform     string
+	debugEnabled  bool
+	target        string
+	platform      string
+	withTailscale bool
 )
 
 func init() {
 	flag.BoolVar(&debugEnabled, "debug", false, "enable debug")
 	flag.StringVar(&target, "target", "android", "target platform")
 	flag.StringVar(&platform, "platform", "", "specify platform")
+	flag.BoolVar(&withTailscale, "with-tailscale", false, "build tailscale for iOS and tvOS")
 }
 
 func main() {
@@ -44,8 +46,9 @@ var (
 	sharedFlags []string
 	debugFlags  []string
 	sharedTags  []string
-	iosTags     []string
+	darwinTags  []string
 	memcTags    []string
+	notMemcTags []string
 	debugTags   []string
 )
 
@@ -60,8 +63,9 @@ func init() {
 	debugFlags = append(debugFlags, "-ldflags", "-X github.com/sagernet/sing-box/constant.Version="+currentTag)
 
 	sharedTags = append(sharedTags, "with_gvisor", "with_quic", "with_wireguard", "with_utls", "with_clash_api", "with_conntrack")
-	iosTags = append(iosTags, "with_dhcp", "with_low_memory")
+	darwinTags = append(darwinTags, "with_dhcp")
 	memcTags = append(memcTags, "with_tailscale")
+	notMemcTags = append(notMemcTags, "with_low_memory")
 	debugTags = append(debugTags, "debug")
 }
 
@@ -103,8 +107,10 @@ func buildAndroid() {
 	}
 
 	if !debugEnabled {
+		sharedFlags[3] = sharedFlags[3] + " -checklinkname=0"
 		args = append(args, sharedFlags...)
 	} else {
+		debugFlags[1] = debugFlags[1] + " -checklinkname=0"
 		args = append(args, debugFlags...)
 	}
 
@@ -151,7 +157,10 @@ func buildApple() {
 		"-v",
 		"-target", bindTarget,
 		"-libname=box",
-		"-tags-macos=" + strings.Join(memcTags, ","),
+		"-tags-not-macos=with_low_memory",
+	}
+	if !withTailscale {
+		args = append(args, "-tags-macos="+strings.Join(memcTags, ","))
 	}
 
 	if !debugEnabled {
@@ -160,7 +169,10 @@ func buildApple() {
 		args = append(args, debugFlags...)
 	}
 
-	tags := append(sharedTags, iosTags...)
+	tags := append(sharedTags, darwinTags...)
+	if withTailscale {
+		tags = append(tags, memcTags...)
+	}
 	if debugEnabled {
 		tags = append(tags, debugTags...)
 	}

cmd/internal/tun_bench/main.go

@@ -0,0 +1,284 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/netip"
+	"os"
+	"os/exec"
+	"strings"
+	"syscall"
+	"time"
+
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/include"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing/common"
+	E "github.com/sagernet/sing/common/exceptions"
+	"github.com/sagernet/sing/common/json"
+	"github.com/sagernet/sing/common/shell"
+)
+
+var iperf3Path string
+
+func main() {
+	err := main0()
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+func main0() error {
+	err := shell.Exec("sudo", "ls").Run()
+	if err != nil {
+		return err
+	}
+	results, err := runTests()
+	if err != nil {
+		return err
+	}
+	encoder := json.NewEncoder(os.Stdout)
+	encoder.SetIndent("", "  ")
+	return encoder.Encode(results)
+}
+
+func runTests() ([]TestResult, error) {
+	boxPaths := []string{
+		os.ExpandEnv("$HOME/Downloads/sing-box-1.11.15-darwin-arm64/sing-box"),
+		//"/Users/sekai/Downloads/sing-box-1.11.15-linux-arm64/sing-box",
+		"./sing-box",
+	}
+	stacks := []string{
+		"gvisor",
+		"system",
+	}
+	mtus := []int{
+		1500,
+		4064,
+		// 16384,
+		// 32768,
+		// 49152,
+		65535,
+	}
+	flagList := [][]string{
+		{},
+	}
+	var results []TestResult
+	for _, boxPath := range boxPaths {
+		for _, stack := range stacks {
+			for _, mtu := range mtus {
+				if strings.HasPrefix(boxPath, ".") {
+					for _, flags := range flagList {
+						result, err := testOnce(boxPath, stack, mtu, false, flags)
+						if err != nil {
+							return nil, err
+						}
+						results = append(results, *result)
+					}
+				} else {
+					result, err := testOnce(boxPath, stack, mtu, false, nil)
+					if err != nil {
+						return nil, err
+					}
+					results = append(results, *result)
+				}
+			}
+		}
+	}
+	return results, nil
+}
+
+type TestResult struct {
+	BoxPath       string   `json:"box_path"`
+	Stack         string   `json:"stack"`
+	MTU           int      `json:"mtu"`
+	Flags         []string `json:"flags"`
+	MultiThread   bool     `json:"multi_thread"`
+	UploadSpeed   string   `json:"upload_speed"`
+	DownloadSpeed string   `json:"download_speed"`
+}
+
+func testOnce(boxPath string, stackName string, mtu int, multiThread bool, flags []string) (result *TestResult, err error) {
+	testAddress := netip.MustParseAddr("1.1.1.1")
+	testConfig := option.Options{
+		Inbounds: []option.Inbound{
+			{
+				Type: C.TypeTun,
+				Options: &option.TunInboundOptions{
+					Address:      []netip.Prefix{netip.MustParsePrefix("172.18.0.1/30")},
+					AutoRoute:    true,
+					MTU:          uint32(mtu),
+					Stack:        stackName,
+					RouteAddress: []netip.Prefix{netip.PrefixFrom(testAddress, testAddress.BitLen())},
+				},
+			},
+		},
+		Route: &option.RouteOptions{
+			Rules: []option.Rule{
+				{
+					Type: C.RuleTypeDefault,
+					DefaultOptions: option.DefaultRule{
+						RawDefaultRule: option.RawDefaultRule{
+							IPCIDR: []string{testAddress.String()},
+						},
+						RuleAction: option.RuleAction{
+							Action: C.RuleActionTypeRouteOptions,
+							RouteOptionsOptions: option.RouteOptionsActionOptions{
+								OverrideAddress: "127.0.0.1",
+							},
+						},
+					},
+				},
+			},
+			AutoDetectInterface: true,
+		},
+	}
+	ctx := include.Context(context.Background())
+	tempConfig, err := os.CreateTemp("", "tun-bench-*.json")
+	if err != nil {
+		return
+	}
+	defer os.Remove(tempConfig.Name())
+	encoder := json.NewEncoderContext(ctx, tempConfig)
+	encoder.SetIndent("", "  ")
+	err = encoder.Encode(testConfig)
+	if err != nil {
+		return nil, E.Cause(err, "encode test config")
+	}
+	tempConfig.Close()
+	var sudoArgs []string
+	if len(flags) > 0 {
+		sudoArgs = append(sudoArgs, "env")
+		sudoArgs = append(sudoArgs, flags...)
+	}
+	sudoArgs = append(sudoArgs, boxPath, "run", "-c", tempConfig.Name())
+	boxProcess := shell.Exec("sudo", sudoArgs...)
+	boxProcess.Stdout = &stderrWriter{}
+	boxProcess.Stderr = io.Discard
+	err = boxProcess.Start()
+	if err != nil {
+		return
+	}
+
+	if C.IsDarwin {
+		iperf3Path, err = exec.LookPath("iperf3-darwin")
+	} else {
+		iperf3Path, err = exec.LookPath("iperf3")
+	}
+	if err != nil {
+		return
+	}
+	serverProcess := shell.Exec(iperf3Path, "-s")
+	serverProcess.Stdout = io.Discard
+	serverProcess.Stderr = io.Discard
+	err = serverProcess.Start()
+	if err != nil {
+		return nil, E.Cause(err, "start iperf3 server")
+	}
+
+	time.Sleep(time.Second)
+
+	args := []string{"-c", testAddress.String()}
+	if multiThread {
+		args = append(args, "-P", "10")
+	}
+
+	uploadProcess := shell.Exec(iperf3Path, args...)
+	output, err := uploadProcess.Read()
+	if err != nil {
+		boxProcess.Process.Signal(syscall.SIGKILL)
+		serverProcess.Process.Signal(syscall.SIGKILL)
+		println(output)
+		return
+	}
+
+	uploadResult := common.SubstringBeforeLast(output, "iperf Done.")
+	uploadResult = common.SubstringBeforeLast(uploadResult, "sender")
+	uploadResult = common.SubstringBeforeLast(uploadResult, "bits/sec")
+	uploadResult = common.SubstringAfterLast(uploadResult, "Bytes")
+	uploadResult = strings.ReplaceAll(uploadResult, " ", "")
+
+	result = &TestResult{
+		BoxPath:     boxPath,
+		Stack:       stackName,
+		MTU:         mtu,
+		Flags:       flags,
+		MultiThread: multiThread,
+		UploadSpeed: uploadResult,
+	}
+
+	downloadProcess := shell.Exec(iperf3Path, append(args, "-R")...)
+	output, err = downloadProcess.Read()
+	if err != nil {
+		boxProcess.Process.Signal(syscall.SIGKILL)
+		serverProcess.Process.Signal(syscall.SIGKILL)
+		println(output)
+		return
+	}
+
+	downloadResult := common.SubstringBeforeLast(output, "iperf Done.")
+	downloadResult = common.SubstringBeforeLast(downloadResult, "receiver")
+	downloadResult = common.SubstringBeforeLast(downloadResult, "bits/sec")
+	downloadResult = common.SubstringAfterLast(downloadResult, "Bytes")
+	downloadResult = strings.ReplaceAll(downloadResult, " ", "")
+
+	result.DownloadSpeed = downloadResult
+
+	printArgs := []any{boxPath, stackName, mtu, "upload", uploadResult, "download", downloadResult}
+	if len(flags) > 0 {
+		printArgs = append(printArgs, "flags", strings.Join(flags, " "))
+	}
+	if multiThread {
+		printArgs = append(printArgs, "(-P 10)")
+	}
+	fmt.Println(printArgs...)
+	err = boxProcess.Process.Signal(syscall.SIGTERM)
+	if err != nil {
+		return
+	}
+
+	err = serverProcess.Process.Signal(syscall.SIGTERM)
+	if err != nil {
+		return
+	}
+
+	boxDone := make(chan struct{})
+	go func() {
+		boxProcess.Cmd.Wait()
+		close(boxDone)
+	}()
+
+	serverDone := make(chan struct{})
+	go func() {
+		serverProcess.Process.Wait()
+		close(serverDone)
+	}()
+
+	select {
+	case <-boxDone:
+	case <-time.After(2 * time.Second):
+		boxProcess.Process.Kill()
+	case <-time.After(4 * time.Second):
+		println("box process did not close!")
+		os.Exit(1)
+	}
+
+	select {
+	case <-serverDone:
+	case <-time.After(2 * time.Second):
+		serverProcess.Process.Kill()
+	case <-time.After(4 * time.Second):
+		println("server process did not close!")
+		os.Exit(1)
+	}
+
+	return
+}
+
+type stderrWriter struct{}
+
+func (w *stderrWriter) Write(p []byte) (n int, err error) {
+	return os.Stderr.Write(p)
+}

cmd/sing-box/cmd_rule_set_convert.go

@@ -5,7 +5,7 @@ import (
 	"os"
 	"strings"
 
-	"github.com/sagernet/sing-box/cmd/sing-box/internal/convertor/adguard"
+	"github.com/sagernet/sing-box/common/convertor/adguard"
 	"github.com/sagernet/sing-box/common/srs"
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/log"
@@ -54,7 +54,7 @@ func convertRuleSet(sourcePath string) error {
 	var rules []option.HeadlessRule
 	switch flagRuleSetConvertType {
 	case "adguard":
-		rules, err = adguard.Convert(reader)
+		rules, err = adguard.ToOptions(reader, log.StdLogger())
 	case "":
 		return E.New("source type is required")
 	default:

cmd/sing-box/cmd_rule_set_decompile.go

@@ -6,7 +6,10 @@ import (
 	"strings"
 
 	"github.com/sagernet/sing-box/common/srs"
+	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-box/option"
+	E "github.com/sagernet/sing/common/exceptions"
 	"github.com/sagernet/sing/common/json"
 
 	"github.com/spf13/cobra"
@@ -50,6 +53,11 @@ func decompileRuleSet(sourcePath string) error {
 	if err != nil {
 		return err
 	}
+	if hasRule(ruleSet.Options.Rules, func(rule option.DefaultHeadlessRule) bool {
+		return len(rule.AdGuardDomain) > 0
+	}) {
+		return E.New("unable to decompile binary AdGuard rules to rule-set.")
+	}
 	var outputPath string
 	if flagRuleSetDecompileOutput == flagRuleSetDecompileDefaultOutput {
 		if strings.HasSuffix(sourcePath, ".srs") {
@@ -75,3 +83,19 @@ func decompileRuleSet(sourcePath string) error {
 	outputFile.Close()
 	return nil
 }
+
+func hasRule(rules []option.HeadlessRule, cond func(rule option.DefaultHeadlessRule) bool) bool {
+	for _, rule := range rules {
+		switch rule.Type {
+		case C.RuleTypeDefault:
+			if cond(rule.DefaultOptions) {
+				return true
+			}
+		case C.RuleTypeLogical:
+			if hasRule(rule.LogicalOptions.Rules, cond) {
+				return true
+			}
+		}
+	}
+	return false
+}

common/badtls/read_wait.go

@@ -128,6 +128,10 @@ func (c *ReadWaitConn) Upstream() any {
 	return c.Conn
 }
 
+func (c *ReadWaitConn) ReaderReplaceable() bool {
+	return true
+}
+
 var tlsRegistry []func(conn net.Conn) (loaded bool, tlsReadRecord func() error, tlsHandlePostHandshakeMessage func() error)
 
 func init() {

common/badtls/read_wait_utls.go

@@ -6,22 +6,26 @@ import (
 	"net"
 	_ "unsafe"
 
-	"github.com/sagernet/sing/common"
-
 	"github.com/metacubex/utls"
 )
 
 func init() {
 	tlsRegistry = append(tlsRegistry, func(conn net.Conn) (loaded bool, tlsReadRecord func() error, tlsHandlePostHandshakeMessage func() error) {
-		tlsConn, loaded := common.Cast[*tls.UConn](conn)
-		if !loaded {
-			return
+		switch tlsConn := conn.(type) {
+		case *tls.UConn:
+			return true, func() error {
+					return utlsReadRecord(tlsConn.Conn)
+				}, func() error {
+					return utlsHandlePostHandshakeMessage(tlsConn.Conn)
+				}
+		case *tls.Conn:
+			return true, func() error {
+					return utlsReadRecord(tlsConn)
+				}, func() error {
+					return utlsHandlePostHandshakeMessage(tlsConn)
+				}
 		}
-		return true, func() error {
-				return utlsReadRecord(tlsConn.Conn)
-			}, func() error {
-				return utlsHandlePostHandshakeMessage(tlsConn.Conn)
-			}
+		return
 	})
 }
 

common/certificate/store.go

@@ -7,6 +7,7 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+	"sync"
 
 	"github.com/sagernet/fswatch"
 	"github.com/sagernet/sing-box/adapter"
@@ -21,6 +22,7 @@ import (
 var _ adapter.CertificateStore = (*Store)(nil)
 
 type Store struct {
+	access                    sync.RWMutex
 	systemPool                *x509.CertPool
 	currentPool               *x509.CertPool
 	certificate               string
@@ -115,10 +117,14 @@ func (s *Store) Close() error {
 }
 
 func (s *Store) Pool() *x509.CertPool {
+	s.access.RLock()
+	defer s.access.RUnlock()
 	return s.currentPool
 }
 
 func (s *Store) update() error {
+	s.access.Lock()
+	defer s.access.Unlock()
 	var currentPool *x509.CertPool
 	if s.systemPool == nil {
 		currentPool = x509.NewCertPool()

common/convertor/adguard/convertor.go

@@ -2,6 +2,7 @@ package adguard
 
 import (
 	"bufio"
+	"bytes"
 	"io"
 	"net/netip"
 	"os"
@@ -9,10 +10,10 @@ import (
 	"strings"
 
 	C "github.com/sagernet/sing-box/constant"
-	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
 	"github.com/sagernet/sing/common"
 	E "github.com/sagernet/sing/common/exceptions"
+	"github.com/sagernet/sing/common/logger"
 	M "github.com/sagernet/sing/common/metadata"
 )
 
@@ -27,7 +28,7 @@ type agdguardRuleLine struct {
 	isImportant bool
 }
 
-func Convert(reader io.Reader) ([]option.HeadlessRule, error) {
+func ToOptions(reader io.Reader, logger logger.Logger) ([]option.HeadlessRule, error) {
 	scanner := bufio.NewScanner(reader)
 	var (
 		ruleLines    []agdguardRuleLine
@@ -36,7 +37,10 @@ func Convert(reader io.Reader) ([]option.HeadlessRule, error) {
 parseLine:
 	for scanner.Scan() {
 		ruleLine := scanner.Text()
-		if ruleLine == "" || ruleLine[0] == '!' || ruleLine[0] == '#' {
+		if ruleLine == "" {
+			continue
+		}
+		if strings.HasPrefix(ruleLine, "!") || strings.HasPrefix(ruleLine, "#") {
 			continue
 		}
 		originRuleLine := ruleLine
@@ -92,7 +96,7 @@ parseLine:
 				}
 				if !ignored {
 					ignoredLines++
-					log.Debug("ignored unsupported rule with modifier: ", paramParts[0], ": ", ruleLine)
+					logger.Debug("ignored unsupported rule with modifier: ", paramParts[0], ": ", originRuleLine)
 					continue parseLine
 				}
 			}
@@ -120,27 +124,35 @@ parseLine:
 			ruleLine = ruleLine[1 : len(ruleLine)-1]
 			if ignoreIPCIDRRegexp(ruleLine) {
 				ignoredLines++
-				log.Debug("ignored unsupported rule with IPCIDR regexp: ", ruleLine)
+				logger.Debug("ignored unsupported rule with IPCIDR regexp: ", originRuleLine)
 				continue
 			}
 			isRegexp = true
 		} else {
 			if strings.Contains(ruleLine, "://") {
 				ruleLine = common.SubstringAfter(ruleLine, "://")
+				isSuffix = true
 			}
 			if strings.Contains(ruleLine, "/") {
 				ignoredLines++
-				log.Debug("ignored unsupported rule with path: ", ruleLine)
+				logger.Debug("ignored unsupported rule with path: ", originRuleLine)
 				continue
 			}
-			if strings.Contains(ruleLine, "##") {
+			if strings.Contains(ruleLine, "?") || strings.Contains(ruleLine, "&") {
 				ignoredLines++
-				log.Debug("ignored unsupported rule with element hiding: ", ruleLine)
+				logger.Debug("ignored unsupported rule with query: ", originRuleLine)
 				continue
 			}
-			if strings.Contains(ruleLine, "#$#") {
+			if strings.Contains(ruleLine, "[") || strings.Contains(ruleLine, "]") ||
+				strings.Contains(ruleLine, "(") || strings.Contains(ruleLine, ")") ||
+				strings.Contains(ruleLine, "!") || strings.Contains(ruleLine, "#") {
 				ignoredLines++
-				log.Debug("ignored unsupported rule with element hiding: ", ruleLine)
+				logger.Debug("ignored unsupported cosmetic filter: ", originRuleLine)
+				continue
+			}
+			if strings.Contains(ruleLine, "~") {
+				ignoredLines++
+				logger.Debug("ignored unsupported rule modifier: ", originRuleLine)
 				continue
 			}
 			var domainCheck string
@@ -151,7 +163,7 @@ parseLine:
 			}
 			if ruleLine == "" {
 				ignoredLines++
-				log.Debug("ignored unsupported rule with empty domain", originRuleLine)
+				logger.Debug("ignored unsupported rule with empty domain", originRuleLine)
 				continue
 			} else {
 				domainCheck = strings.ReplaceAll(domainCheck, "*", "x")
@@ -159,13 +171,13 @@ parseLine:
 					_, ipErr := parseADGuardIPCIDRLine(ruleLine)
 					if ipErr == nil {
 						ignoredLines++
-						log.Debug("ignored unsupported rule with IPCIDR: ", ruleLine)
+						logger.Debug("ignored unsupported rule with IPCIDR: ", originRuleLine)
 						continue
 					}
 					if M.ParseSocksaddr(domainCheck).Port != 0 {
-						log.Debug("ignored unsupported rule with port: ", ruleLine)
+						logger.Debug("ignored unsupported rule with port: ", originRuleLine)
 					} else {
-						log.Debug("ignored unsupported rule with invalid domain: ", ruleLine)
+						logger.Debug("ignored unsupported rule with invalid domain: ", originRuleLine)
 					}
 					ignoredLines++
 					continue
@@ -283,10 +295,112 @@ parseLine:
 			},
 		}
 	}
-	log.Info("parsed rules: ", len(ruleLines), "/", len(ruleLines)+ignoredLines)
+	if ignoredLines > 0 {
+		logger.Info("parsed rules: ", len(ruleLines), "/", len(ruleLines)+ignoredLines)
+	}
 	return []option.HeadlessRule{currentRule}, nil
 }
 
+var ErrInvalid = E.New("invalid binary AdGuard rule-set")
+
+func FromOptions(rules []option.HeadlessRule) ([]byte, error) {
+	if len(rules) != 1 {
+		return nil, ErrInvalid
+	}
+	rule := rules[0]
+	var (
+		importantDomain             []string
+		importantDomainRegex        []string
+		importantExcludeDomain      []string
+		importantExcludeDomainRegex []string
+		domain                      []string
+		domainRegex                 []string
+		excludeDomain               []string
+		excludeDomainRegex          []string
+	)
+parse:
+	for {
+		switch rule.Type {
+		case C.RuleTypeLogical:
+			if !(len(rule.LogicalOptions.Rules) == 2 && rule.LogicalOptions.Rules[0].Type == C.RuleTypeDefault) {
+				return nil, ErrInvalid
+			}
+			if rule.LogicalOptions.Mode == C.LogicalTypeAnd && rule.LogicalOptions.Rules[0].DefaultOptions.Invert {
+				if len(importantExcludeDomain) == 0 && len(importantExcludeDomainRegex) == 0 {
+					importantExcludeDomain = rule.LogicalOptions.Rules[0].DefaultOptions.AdGuardDomain
+					importantExcludeDomainRegex = rule.LogicalOptions.Rules[0].DefaultOptions.DomainRegex
+					if len(importantExcludeDomain)+len(importantExcludeDomainRegex) == 0 {
+						return nil, ErrInvalid
+					}
+				} else {
+					excludeDomain = rule.LogicalOptions.Rules[0].DefaultOptions.AdGuardDomain
+					excludeDomainRegex = rule.LogicalOptions.Rules[0].DefaultOptions.DomainRegex
+					if len(excludeDomain)+len(excludeDomainRegex) == 0 {
+						return nil, ErrInvalid
+					}
+				}
+			} else if rule.LogicalOptions.Mode == C.LogicalTypeOr && !rule.LogicalOptions.Rules[0].DefaultOptions.Invert {
+				importantDomain = rule.LogicalOptions.Rules[0].DefaultOptions.AdGuardDomain
+				importantDomainRegex = rule.LogicalOptions.Rules[0].DefaultOptions.DomainRegex
+				if len(importantDomain)+len(importantDomainRegex) == 0 {
+					return nil, ErrInvalid
+				}
+			} else {
+				return nil, ErrInvalid
+			}
+			rule = rule.LogicalOptions.Rules[1]
+		case C.RuleTypeDefault:
+			domain = rule.DefaultOptions.AdGuardDomain
+			domainRegex = rule.DefaultOptions.DomainRegex
+			if len(domain)+len(domainRegex) == 0 {
+				return nil, ErrInvalid
+			}
+			break parse
+		}
+	}
+	var output bytes.Buffer
+	for _, ruleLine := range importantDomain {
+		output.WriteString(ruleLine)
+		output.WriteString("$important\n")
+	}
+	for _, ruleLine := range importantDomainRegex {
+		output.WriteString("/")
+		output.WriteString(ruleLine)
+		output.WriteString("/$important\n")
+
+	}
+	for _, ruleLine := range importantExcludeDomain {
+		output.WriteString("@@")
+		output.WriteString(ruleLine)
+		output.WriteString("$important\n")
+	}
+	for _, ruleLine := range importantExcludeDomainRegex {
+		output.WriteString("@@/")
+		output.WriteString(ruleLine)
+		output.WriteString("/$important\n")
+	}
+	for _, ruleLine := range domain {
+		output.WriteString(ruleLine)
+		output.WriteString("\n")
+	}
+	for _, ruleLine := range domainRegex {
+		output.WriteString("/")
+		output.WriteString(ruleLine)
+		output.WriteString("/\n")
+	}
+	for _, ruleLine := range excludeDomain {
+		output.WriteString("@@")
+		output.WriteString(ruleLine)
+		output.WriteString("\n")
+	}
+	for _, ruleLine := range excludeDomainRegex {
+		output.WriteString("@@/")
+		output.WriteString(ruleLine)
+		output.WriteString("/\n")
+	}
+	return output.Bytes(), nil
+}
+
 func ignoreIPCIDRRegexp(ruleLine string) bool {
 	if strings.HasPrefix(ruleLine, "(http?:\\/\\/)") {
 		ruleLine = ruleLine[12:]
@@ -294,11 +408,9 @@ func ignoreIPCIDRRegexp(ruleLine string) bool {
 		ruleLine = ruleLine[13:]
 	} else if strings.HasPrefix(ruleLine, "^") {
 		ruleLine = ruleLine[1:]
-	} else {
-		return false
 	}
-	_, parseErr := strconv.ParseUint(common.SubstringBefore(ruleLine, "\\."), 10, 8)
-	return parseErr == nil
+	return common.Error(strconv.ParseUint(common.SubstringBefore(ruleLine, "\\."), 10, 8)) == nil ||
+		common.Error(strconv.ParseUint(common.SubstringBefore(ruleLine, "."), 10, 8)) == nil
 }
 
 func parseAdGuardHostLine(ruleLine string) (string, error) {
@@ -342,5 +454,5 @@ func parseADGuardIPCIDRLine(ruleLine string) (netip.Prefix, error) {
 	for len(ruleParts) < 4 {
 		ruleParts = append(ruleParts, 0)
 	}
-	return netip.PrefixFrom(netip.AddrFrom4(*(*[4]byte)(ruleParts)), bitLen), nil
+	return netip.PrefixFrom(netip.AddrFrom4([4]byte(ruleParts)), bitLen), nil
 }

common/convertor/adguard/convertor_test.go

@@ -7,13 +7,15 @@ import (
 
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/route/rule"
+	"github.com/sagernet/sing/common/logger"
 
 	"github.com/stretchr/testify/require"
 )
 
 func TestConverter(t *testing.T) {
 	t.Parallel()
-	rules, err := Convert(strings.NewReader(`
+	ruleString := `||sagernet.org^$important
+@@|sing-box.sagernet.org^$important
 ||example.org^
 |example.com^
 example.net^
@@ -21,10 +23,9 @@ example.net^
 ||example.edu.tw^
 |example.gov
 example.arpa
-@@|sagernet.example.org|
-||sagernet.org^$important
-@@|sing-box.sagernet.org^$important
-`))
+@@|sagernet.example.org^
+`
+	rules, err := ToOptions(strings.NewReader(ruleString), logger.NOP())
 	require.NoError(t, err)
 	require.Len(t, rules, 1)
 	rule, err := rule.NewHeadlessRule(context.Background(), rules[0])
@@ -75,15 +76,18 @@ example.arpa
 			Domain: domain,
 		}), domain)
 	}
+	ruleFromOptions, err := FromOptions(rules)
+	require.NoError(t, err)
+	require.Equal(t, ruleString, string(ruleFromOptions))
 }
 
 func TestHosts(t *testing.T) {
 	t.Parallel()
-	rules, err := Convert(strings.NewReader(`
+	rules, err := ToOptions(strings.NewReader(`
 127.0.0.1 localhost
 ::1 localhost #[IPv6]
 0.0.0.0 google.com
-`))
+`), logger.NOP())
 	require.NoError(t, err)
 	require.Len(t, rules, 1)
 	rule, err := rule.NewHeadlessRule(context.Background(), rules[0])
@@ -110,10 +114,10 @@ func TestHosts(t *testing.T) {
 
 func TestSimpleHosts(t *testing.T) {
 	t.Parallel()
-	rules, err := Convert(strings.NewReader(`
+	rules, err := ToOptions(strings.NewReader(`
 example.com
 www.example.org
-`))
+`), logger.NOP())
 	require.NoError(t, err)
 	require.Len(t, rules, 1)
 	rule, err := rule.NewHeadlessRule(context.Background(), rules[0])

common/dialer/default.go

@@ -15,7 +15,6 @@ import (
 	"github.com/sagernet/sing-box/experimental/libbox/platform"
 	"github.com/sagernet/sing-box/option"
 	"github.com/sagernet/sing/common"
-	"github.com/sagernet/sing/common/atomic"
 	"github.com/sagernet/sing/common/control"
 	E "github.com/sagernet/sing/common/exceptions"
 	M "github.com/sagernet/sing/common/metadata"
@@ -43,7 +42,7 @@ type DefaultDialer struct {
 	networkType            []C.InterfaceType
 	fallbackNetworkType    []C.InterfaceType
 	networkFallbackDelay   time.Duration
-	networkLastFallback    atomic.TypedValue[time.Time]
+	networkLastFallback    common.TypedValue[time.Time]
 }
 
 func NewDefault(ctx context.Context, options option.DialerOptions) (*DefaultDialer, error) {
@@ -89,37 +88,35 @@ func NewDefault(ctx context.Context, options option.DialerOptions) (*DefaultDial
 
 	if networkManager != nil {
 		defaultOptions := networkManager.DefaultOptions()
-		if !disableDefaultBind {
-			if defaultOptions.BindInterface != "" {
-				bindFunc := control.BindToInterface(networkManager.InterfaceFinder(), defaultOptions.BindInterface, -1)
+		if defaultOptions.BindInterface != "" && !disableDefaultBind {
+			bindFunc := control.BindToInterface(networkManager.InterfaceFinder(), defaultOptions.BindInterface, -1)
+			dialer.Control = control.Append(dialer.Control, bindFunc)
+			listener.Control = control.Append(listener.Control, bindFunc)
+		} else if networkManager.AutoDetectInterface() && !disableDefaultBind {
+			if platformInterface != nil {
+				networkStrategy = (*C.NetworkStrategy)(options.NetworkStrategy)
+				networkType = common.Map(options.NetworkType, option.InterfaceType.Build)
+				fallbackNetworkType = common.Map(options.FallbackNetworkType, option.InterfaceType.Build)
+				if networkStrategy == nil && len(networkType) == 0 && len(fallbackNetworkType) == 0 {
+					networkStrategy = defaultOptions.NetworkStrategy
+					networkType = defaultOptions.NetworkType
+					fallbackNetworkType = defaultOptions.FallbackNetworkType
+				}
+				networkFallbackDelay = time.Duration(options.FallbackDelay)
+				if networkFallbackDelay == 0 && defaultOptions.FallbackDelay != 0 {
+					networkFallbackDelay = defaultOptions.FallbackDelay
+				}
+				if networkStrategy == nil {
+					networkStrategy = common.Ptr(C.NetworkStrategyDefault)
+					defaultNetworkStrategy = true
+				}
+				bindFunc := networkManager.ProtectFunc()
+				dialer.Control = control.Append(dialer.Control, bindFunc)
+				listener.Control = control.Append(listener.Control, bindFunc)
+			} else {
+				bindFunc := networkManager.AutoDetectInterfaceFunc()
 				dialer.Control = control.Append(dialer.Control, bindFunc)
 				listener.Control = control.Append(listener.Control, bindFunc)
-			} else if networkManager.AutoDetectInterface() {
-				if platformInterface != nil {
-					networkStrategy = (*C.NetworkStrategy)(options.NetworkStrategy)
-					if networkStrategy == nil {
-						networkStrategy = common.Ptr(C.NetworkStrategyDefault)
-						defaultNetworkStrategy = true
-					}
-					networkType = common.Map(options.NetworkType, option.InterfaceType.Build)
-					fallbackNetworkType = common.Map(options.FallbackNetworkType, option.InterfaceType.Build)
-					if networkStrategy == nil && len(networkType) == 0 && len(fallbackNetworkType) == 0 {
-						networkStrategy = defaultOptions.NetworkStrategy
-						networkType = defaultOptions.NetworkType
-						fallbackNetworkType = defaultOptions.FallbackNetworkType
-					}
-					networkFallbackDelay = time.Duration(options.FallbackDelay)
-					if networkFallbackDelay == 0 && defaultOptions.FallbackDelay != 0 {
-						networkFallbackDelay = defaultOptions.FallbackDelay
-					}
-					bindFunc := networkManager.ProtectFunc()
-					dialer.Control = control.Append(dialer.Control, bindFunc)
-					listener.Control = control.Append(listener.Control, bindFunc)
-				} else {
-					bindFunc := networkManager.AutoDetectInterfaceFunc()
-					dialer.Control = control.Append(dialer.Control, bindFunc)
-					listener.Control = control.Append(listener.Control, bindFunc)
-				}
 			}
 		}
 		if options.RoutingMark == 0 && defaultOptions.RoutingMark != 0 {
@@ -127,6 +124,11 @@ func NewDefault(ctx context.Context, options option.DialerOptions) (*DefaultDial
 			listener.Control = control.Append(listener.Control, setMarkWrapper(networkManager, defaultOptions.RoutingMark, true))
 		}
 	}
+	if networkManager != nil {
+		markFunc := networkManager.AutoRedirectOutputMarkFunc()
+		dialer.Control = control.Append(dialer.Control, markFunc)
+		listener.Control = control.Append(listener.Control, markFunc)
+	}
 	if options.ReuseAddr {
 		listener.Control = control.Append(listener.Control, control.ReuseAddr())
 	}
@@ -140,8 +142,7 @@ func NewDefault(ctx context.Context, options option.DialerOptions) (*DefaultDial
 		dialer.Timeout = C.TCPConnectTimeout
 	}
 	// TODO: Add an option to customize the keep alive period
-	dialer.KeepAlive = C.TCPKeepAliveInitial
-	dialer.Control = control.Append(dialer.Control, control.SetKeepAlivePeriod(C.TCPKeepAliveInitial, C.TCPKeepAliveInterval))
+	setKeepAliveConfig(&dialer, C.TCPKeepAliveInitial, C.TCPKeepAliveInterval)
 	var udpFragment bool
 	if options.UDPFragment != nil {
 		udpFragment = *options.UDPFragment
@@ -271,7 +272,7 @@ func (d *DefaultDialer) DialParallelInterface(ctx context.Context, network strin
 	} else {
 		dialer = d.udpDialer4
 	}
-	fastFallback := time.Now().Sub(d.networkLastFallback.Load()) < C.TCPTimeout
+	fastFallback := time.Since(d.networkLastFallback.Load()) < C.TCPTimeout
 	var (
 		conn      net.Conn
 		isPrimary bool

common/dialer/default_go123.go

@@ -0,0 +1,16 @@
+//go:build go1.23
+
+package dialer
+
+import (
+	"net"
+	"time"
+)
+
+func setKeepAliveConfig(dialer *net.Dialer, idle time.Duration, interval time.Duration) {
+	dialer.KeepAliveConfig = net.KeepAliveConfig{
+		Enable:   true,
+		Idle:     idle,
+		Interval: interval,
+	}
+}

common/dialer/default_nongo123.go

@@ -0,0 +1,15 @@
+//go:build !go1.23
+
+package dialer
+
+import (
+	"net"
+	"time"
+
+	"github.com/sagernet/sing/common/control"
+)
+
+func setKeepAliveConfig(dialer *net.Dialer, idle time.Duration, interval time.Duration) {
+	dialer.KeepAlive = idle
+	dialer.Control = control.Append(dialer.Control, control.SetKeepAlivePeriod(idle, interval))
+}

common/dialer/dialer.go

@@ -111,7 +111,7 @@ func NewWithOptions(options Options) (N.Dialer, error) {
 					dnsQueryOptions.Transport = dnsTransport.Default()
 				} else if options.NewDialer {
 					return nil, E.New("missing domain resolver for domain server address")
-				} else if !options.DirectOutbound {
+				} else {
 					deprecated.Report(options.Context, deprecated.OptionMissingDomainResolver)
 				}
 			}
@@ -145,3 +145,7 @@ type ParallelNetworkDialer interface {
 	DialParallelNetwork(ctx context.Context, network string, destination M.Socksaddr, destinationAddresses []netip.Addr, strategy *C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.Conn, error)
 	ListenSerialNetworkPacket(ctx context.Context, destination M.Socksaddr, destinationAddresses []netip.Addr, strategy *C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.PacketConn, netip.Addr, error)
 }
+
+type PacketDialerWithDestination interface {
+	ListenPacketWithDestination(ctx context.Context, destination M.Socksaddr) (net.PacketConn, netip.Addr, error)
+}

common/dialer/tfo.go

@@ -8,11 +8,11 @@ import (
 	"net"
 	"os"
 	"sync"
+	"sync/atomic"
 	"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"
 
@@ -24,9 +24,11 @@ type slowOpenConn struct {
 	ctx         context.Context
 	network     string
 	destination M.Socksaddr
-	conn        net.Conn
+	conn        atomic.Pointer[net.TCPConn]
 	create      chan struct{}
+	done        chan struct{}
 	access      sync.Mutex
+	closeOnce   sync.Once
 	err         error
 }
 
@@ -45,26 +47,30 @@ func DialSlowContext(dialer *tcpDialer, ctx context.Context, network string, des
 		network:     network,
 		destination: destination,
 		create:      make(chan struct{}),
+		done:        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()
-		}
+	conn := c.conn.Load()
+	if conn != nil {
+		return conn.Read(b)
+	}
+	select {
+	case <-c.create:
+		if c.err != nil {
+			return 0, c.err
+		}
+		return c.conn.Load().Read(b)
+	case <-c.done:
+		return 0, os.ErrClosed
 	}
-	return c.conn.Read(b)
 }
 
 func (c *slowOpenConn) Write(b []byte) (n int, err error) {
-	if c.conn != nil {
-		return c.conn.Write(b)
+	tcpConn := c.conn.Load()
+	if tcpConn != nil {
+		return tcpConn.Write(b)
 	}
 	c.access.Lock()
 	defer c.access.Unlock()
@@ -73,13 +79,16 @@ func (c *slowOpenConn) Write(b []byte) (n int, err error) {
 		if c.err != nil {
 			return 0, c.err
 		}
-		return c.conn.Write(b)
+		return c.conn.Load().Write(b)
+	case <-c.done:
+		return 0, os.ErrClosed
 	default:
 	}
-	c.conn, err = c.dialer.DialContext(c.ctx, c.network, c.destination.String(), b)
+	conn, err := c.dialer.DialContext(c.ctx, c.network, c.destination.String(), b)
 	if err != nil {
-		c.conn = nil
-		c.err = E.Cause(err, "dial tcp fast open")
+		c.err = err
+	} else {
+		c.conn.Store(conn.(*net.TCPConn))
 	}
 	n = len(b)
 	close(c.create)
@@ -87,74 +96,87 @@ func (c *slowOpenConn) Write(b []byte) (n int, err error) {
 }
 
 func (c *slowOpenConn) Close() error {
-	return common.Close(c.conn)
+	c.closeOnce.Do(func() {
+		close(c.done)
+		conn := c.conn.Load()
+		if conn != nil {
+			conn.Close()
+		}
+	})
+	return nil
 }
 
 func (c *slowOpenConn) LocalAddr() net.Addr {
-	if c.conn == nil {
+	conn := c.conn.Load()
+	if conn == nil {
 		return M.Socksaddr{}
 	}
-	return c.conn.LocalAddr()
+	return conn.LocalAddr()
 }
 
 func (c *slowOpenConn) RemoteAddr() net.Addr {
-	if c.conn == nil {
+	conn := c.conn.Load()
+	if conn == nil {
 		return M.Socksaddr{}
 	}
-	return c.conn.RemoteAddr()
+	return conn.RemoteAddr()
 }
 
 func (c *slowOpenConn) SetDeadline(t time.Time) error {
-	if c.conn == nil {
+	conn := c.conn.Load()
+	if conn == nil {
 		return os.ErrInvalid
 	}
-	return c.conn.SetDeadline(t)
+	return conn.SetDeadline(t)
 }
 
 func (c *slowOpenConn) SetReadDeadline(t time.Time) error {
-	if c.conn == nil {
+	conn := c.conn.Load()
+	if conn == nil {
 		return os.ErrInvalid
 	}
-	return c.conn.SetReadDeadline(t)
+	return conn.SetReadDeadline(t)
 }
 
 func (c *slowOpenConn) SetWriteDeadline(t time.Time) error {
-	if c.conn == nil {
+	conn := c.conn.Load()
+	if conn == nil {
 		return os.ErrInvalid
 	}
-	return c.conn.SetWriteDeadline(t)
+	return conn.SetWriteDeadline(t)
 }
 
 func (c *slowOpenConn) Upstream() any {
-	return c.conn
+	return common.PtrOrNil(c.conn.Load())
 }
 
 func (c *slowOpenConn) ReaderReplaceable() bool {
-	return c.conn != nil
+	return c.conn.Load() != nil
 }
 
 func (c *slowOpenConn) WriterReplaceable() bool {
-	return c.conn != nil
+	return c.conn.Load() != nil
 }
 
 func (c *slowOpenConn) LazyHeadroom() bool {
-	return c.conn == nil
+	return c.conn.Load() == nil
 }
 
 func (c *slowOpenConn) NeedHandshake() bool {
-	return c.conn == nil
+	return c.conn.Load() == nil
 }
 
 func (c *slowOpenConn) WriteTo(w io.Writer) (n int64, err error) {
-	if c.conn == nil {
+	conn := c.conn.Load()
+	if conn == nil {
 		select {
 		case <-c.create:
 			if c.err != nil {
 				return 0, c.err
 			}
-		case <-c.ctx.Done():
-			return 0, c.ctx.Err()
+		case <-c.done:
+			return 0, c.err
 		}
 	}
-	return bufio.Copy(w, c.conn)
+	return bufio.Copy(w, c.conn.Load())
 }

common/listener/listener.go

@@ -151,6 +151,7 @@ func ListenNetworkNamespace[T any](nameOrPath string, block func() (T, error)) (
 		if err != nil {
 			return common.DefaultValue[T](), E.Cause(err, "get current netns")
 		}
+		defer currentNs.Close()
 		defer netns.Set(currentNs)
 		var targetNs netns.NsHandle
 		if strings.HasPrefix(nameOrPath, "/") {

common/listener/listener_tcp.go

@@ -3,6 +3,7 @@ package listener
 import (
 	"net"
 	"net/netip"
+	"strings"
 	"syscall"
 	"time"
 
@@ -56,7 +57,7 @@ func (l *Listener) ListenTCP() (net.Listener, error) {
 	if l.tproxy {
 		listenConfig.Control = control.Append(listenConfig.Control, func(network, address string, conn syscall.RawConn) error {
 			return control.Raw(conn, func(fd uintptr) error {
-				return redir.TProxy(fd, M.ParseSocksaddr(address).IsIPv6(), false)
+				return redir.TProxy(fd, !strings.HasSuffix(network, "4"), false)
 			})
 		})
 	}

common/listener/listener_udp.go

@@ -5,6 +5,7 @@ import (
 	"net"
 	"net/netip"
 	"os"
+	"strings"
 	"syscall"
 
 	"github.com/sagernet/sing-box/adapter"
@@ -41,7 +42,7 @@ func (l *Listener) ListenUDP() (net.PacketConn, error) {
 	if l.tproxy {
 		listenConfig.Control = control.Append(listenConfig.Control, func(network, address string, conn syscall.RawConn) error {
 			return control.Raw(conn, func(fd uintptr) error {
-				return redir.TProxy(fd, M.ParseSocksaddr(address).IsIPv6(), true)
+				return redir.TProxy(fd, !strings.HasSuffix(network, "4"), true)
 			})
 		})
 	}
@@ -164,9 +165,8 @@ func (l *Listener) loopUDPOut() {
 				if l.shutdown.Load() && E.IsClosed(err) {
 					return
 				}
-				l.udpConn.Close()
 				l.logger.Error("udp listener write back: ", destination, ": ", err)
-				return
+				continue
 			}
 			continue
 		case <-l.packetOutboundClosed:

common/process/searcher_darwin.go

@@ -76,6 +76,8 @@ func findProcessName(network string, ip netip.Addr, port int) (string, error) {
 		// rup8(sizeof(xtcpcb_n))
 		itemSize += 208
 	}
+
+	var fallbackUDPProcess string
 	// skip the first xinpgen(24 bytes) block
 	for i := 24; i+itemSize <= len(buf); i += itemSize {
 		// offset of xinpcb_n and xsocket_n
@@ -90,24 +92,34 @@ func findProcessName(network string, ip netip.Addr, port int) (string, error) {
 		flag := buf[inp+44]
 
 		var srcIP netip.Addr
+		srcIsIPv4 := false
 		switch {
 		case flag&0x1 > 0 && isIPv4:
 			// ipv4
-			srcIP = netip.AddrFrom4(*(*[4]byte)(buf[inp+76 : inp+80]))
+			srcIP = netip.AddrFrom4([4]byte(buf[inp+76 : inp+80]))
+			srcIsIPv4 = true
 		case flag&0x2 > 0 && !isIPv4:
 			// ipv6
-			srcIP = netip.AddrFrom16(*(*[16]byte)(buf[inp+64 : inp+80]))
+			srcIP = netip.AddrFrom16([16]byte(buf[inp+64 : inp+80]))
 		default:
 			continue
 		}
 
-		if ip != srcIP {
-			continue
+		if ip == srcIP {
+			// xsocket_n.so_last_pid
+			pid := readNativeUint32(buf[so+68 : so+72])
+			return getExecPathFromPID(pid)
 		}
 
-		// xsocket_n.so_last_pid
-		pid := readNativeUint32(buf[so+68 : so+72])
-		return getExecPathFromPID(pid)
+		// udp packet connection may be not equal with srcIP
+		if network == N.NetworkUDP && srcIP.IsUnspecified() && isIPv4 == srcIsIPv4 {
+			pid := readNativeUint32(buf[so+68 : so+72])
+			fallbackUDPProcess, _ = getExecPathFromPID(pid)
+		}
+	}
+
+	if network == N.NetworkUDP && len(fallbackUDPProcess) > 0 {
+		return fallbackUDPProcess, nil
 	}
 
 	return "", ErrNotFound

common/sniff/quic.go

@@ -303,8 +303,6 @@ find:
 	metadata.Protocol = C.ProtocolQUIC
 	fingerprint, err := ja3.Compute(buffer.Bytes())
 	if err != nil {
-		metadata.Protocol = C.ProtocolQUIC
-		metadata.Client = C.ClientChromium
 		metadata.SniffContext = fragments
 		return E.Cause1(ErrNeedMoreData, err)
 	}
@@ -334,7 +332,7 @@ find:
 		}
 
 		if count(frameTypeList, frameTypeCrypto) > 1 || count(frameTypeList, frameTypePing) > 0 {
-			if maybeUQUIC(fingerprint) {
+			if isQUICGo(fingerprint) {
 				metadata.Client = C.ClientQUICGo
 			} else {
 				metadata.Client = C.ClientChromium

common/sniff/quic_blacklist.go

@@ -1,24 +1,29 @@
 package sniff
 
 import (
-	"crypto/tls"
-
 	"github.com/sagernet/sing-box/common/ja3"
 )
 
-// Chromium sends separate client hello packets, but UQUIC has not yet implemented this behavior
-// The cronet without this behavior does not have version 115
-var uQUICChrome115 = &ja3.ClientHello{
-	Version:             tls.VersionTLS12,
-	CipherSuites:        []uint16{4865, 4866, 4867},
-	Extensions:          []uint16{0, 10, 13, 16, 27, 43, 45, 51, 57, 17513},
-	EllipticCurves:      []uint16{29, 23, 24},
-	SignatureAlgorithms: []uint16{1027, 2052, 1025, 1283, 2053, 1281, 2054, 1537, 513},
-}
+const (
+	// X25519Kyber768Draft00 - post-quantum curve used by Go crypto/tls
+	x25519Kyber768Draft00 uint16 = 0x11EC // 4588
+	// renegotiation_info extension used by Go crypto/tls
+	extensionRenegotiationInfo uint16 = 0xFF01 // 65281
+)
 
-func maybeUQUIC(fingerprint *ja3.ClientHello) bool {
-	if uQUICChrome115.Equals(fingerprint, true) {
-		return true
+// isQUICGo detects native quic-go by checking for Go crypto/tls specific features.
+// Note: uQUIC with Chromium mimicry cannot be reliably distinguished from real Chromium
+// since it uses the same TLS fingerprint, so it will be identified as Chromium.
+func isQUICGo(fingerprint *ja3.ClientHello) bool {
+	for _, curve := range fingerprint.EllipticCurves {
+		if curve == x25519Kyber768Draft00 {
+			return true
+		}
+	}
+	for _, ext := range fingerprint.Extensions {
+		if ext == extensionRenegotiationInfo {
+			return true
+		}
 	}
 	return false
 }

common/sniff/quic_capture_test.go

@@ -0,0 +1,188 @@
+package sniff_test
+
+import (
+	"context"
+	"crypto/tls"
+	"encoding/hex"
+	"errors"
+	"net"
+	"testing"
+	"time"
+
+	"github.com/sagernet/quic-go"
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/common/sniff"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestSniffQUICQuicGoFingerprint(t *testing.T) {
+	t.Parallel()
+	const testSNI = "test.example.com"
+
+	udpConn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 0})
+	require.NoError(t, err)
+	defer udpConn.Close()
+
+	serverAddr := udpConn.LocalAddr().(*net.UDPAddr)
+	packetsChan := make(chan [][]byte, 1)
+
+	go func() {
+		var packets [][]byte
+		udpConn.SetReadDeadline(time.Now().Add(3 * time.Second))
+		for i := 0; i < 10; i++ {
+			buf := make([]byte, 2048)
+			n, _, err := udpConn.ReadFromUDP(buf)
+			if err != nil {
+				break
+			}
+			packets = append(packets, buf[:n])
+		}
+		packetsChan <- packets
+	}()
+
+	clientConn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 0})
+	require.NoError(t, err)
+	defer clientConn.Close()
+
+	tlsConfig := &tls.Config{
+		ServerName:         testSNI,
+		InsecureSkipVerify: true,
+		NextProtos:         []string{"h3"},
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
+	defer cancel()
+
+	_, _ = quic.Dial(ctx, clientConn, serverAddr, tlsConfig, &quic.Config{})
+
+	select {
+	case packets := <-packetsChan:
+		t.Logf("Captured %d packets", len(packets))
+
+		var metadata adapter.InboundContext
+		for i, pkt := range packets {
+			err := sniff.QUICClientHello(context.Background(), &metadata, pkt)
+			t.Logf("Packet %d: err=%v, domain=%s, client=%s", i, err, metadata.Domain, metadata.Client)
+			if metadata.Domain != "" {
+				break
+			}
+		}
+
+		t.Logf("\n=== quic-go TLS Fingerprint Analysis ===")
+		t.Logf("Domain: %s", metadata.Domain)
+		t.Logf("Client: %s", metadata.Client)
+		t.Logf("Protocol: %s", metadata.Protocol)
+
+		// The client should be identified as quic-go, not chromium
+		// Current issue: it's being identified as chromium
+		if metadata.Client == "chromium" {
+			t.Log("WARNING: quic-go is being misidentified as chromium!")
+		}
+
+	case <-time.After(5 * time.Second):
+		t.Fatal("Timeout")
+	}
+}
+
+func TestSniffQUICInitialFromQuicGo(t *testing.T) {
+	t.Parallel()
+
+	const testSNI = "test.example.com"
+
+	// Create UDP listener to capture ALL initial packets
+	udpConn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 0})
+	require.NoError(t, err)
+	defer udpConn.Close()
+
+	serverAddr := udpConn.LocalAddr().(*net.UDPAddr)
+
+	// Channel to receive captured packets
+	packetsChan := make(chan [][]byte, 1)
+
+	// Start goroutine to capture packets
+	go func() {
+		var packets [][]byte
+		udpConn.SetReadDeadline(time.Now().Add(3 * time.Second))
+		for i := 0; i < 5; i++ { // Capture up to 5 packets
+			buf := make([]byte, 2048)
+			n, _, err := udpConn.ReadFromUDP(buf)
+			if err != nil {
+				break
+			}
+			packets = append(packets, buf[:n])
+		}
+		packetsChan <- packets
+	}()
+
+	// Create QUIC client connection (will fail but we capture the initial packet)
+	clientConn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 0})
+	require.NoError(t, err)
+	defer clientConn.Close()
+
+	tlsConfig := &tls.Config{
+		ServerName:         testSNI,
+		InsecureSkipVerify: true,
+		NextProtos:         []string{"h3"},
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
+	defer cancel()
+
+	// This will fail (no server) but sends initial packet
+	_, _ = quic.Dial(ctx, clientConn, serverAddr, tlsConfig, &quic.Config{})
+
+	// Wait for captured packets
+	select {
+	case packets := <-packetsChan:
+		t.Logf("Captured %d QUIC packets", len(packets))
+
+		for i, packet := range packets {
+			t.Logf("Packet %d: length=%d, first 30 bytes: %x", i, len(packet), packet[:min(30, len(packet))])
+		}
+
+		// Test sniffer with first packet
+		if len(packets) > 0 {
+			var metadata adapter.InboundContext
+			err := sniff.QUICClientHello(context.Background(), &metadata, packets[0])
+
+			t.Logf("First packet sniff error: %v", err)
+			t.Logf("Protocol: %s", metadata.Protocol)
+			t.Logf("Domain: %s", metadata.Domain)
+			t.Logf("Client: %s", metadata.Client)
+
+			// If first packet needs more data, try with subsequent packets
+			// IMPORTANT: reuse metadata to accumulate CRYPTO fragments via SniffContext
+			if errors.Is(err, sniff.ErrNeedMoreData) && len(packets) > 1 {
+				t.Log("First packet needs more data, trying subsequent packets with shared context...")
+				for i := 1; i < len(packets); i++ {
+					// Reuse same metadata to accumulate fragments
+					err = sniff.QUICClientHello(context.Background(), &metadata, packets[i])
+					t.Logf("Packet %d sniff result: err=%v, domain=%s, sniffCtx=%v", i, err, metadata.Domain, metadata.SniffContext != nil)
+					if metadata.Domain != "" || (err != nil && !errors.Is(err, sniff.ErrNeedMoreData)) {
+						break
+					}
+				}
+			}
+
+			// Print hex dump for debugging
+			t.Logf("First packet hex:\n%s", hex.Dump(packets[0][:min(256, len(packets[0]))]))
+
+			// Log final results
+			t.Logf("Final: Protocol=%s, Domain=%s, Client=%s", metadata.Protocol, metadata.Domain, metadata.Client)
+
+			// Verify SNI extraction
+			if metadata.Domain == "" {
+				t.Errorf("Failed to extract SNI, expected: %s", testSNI)
+			} else {
+				require.Equal(t, testSNI, metadata.Domain, "SNI should match")
+			}
+
+			// Check client identification - quic-go should be identified as quic-go, not chromium
+			t.Logf("Client identified as: %s (expected: quic-go)", metadata.Client)
+		}
+
+	case <-time.After(5 * time.Second):
+		t.Fatal("Timeout waiting for QUIC packets")
+	}
+}

common/sniff/quic_test.go

@@ -19,7 +19,7 @@ func TestSniffQUICChromeNew(t *testing.T) {
 	var metadata adapter.InboundContext
 	err = sniff.QUICClientHello(context.Background(), &metadata, pkt)
 	require.Equal(t, metadata.Protocol, C.ProtocolQUIC)
-	require.Equal(t, metadata.Client, C.ClientChromium)
+	require.Empty(t, metadata.Client)
 	require.ErrorIs(t, err, sniff.ErrNeedMoreData)
 	pkt, err = hex.DecodeString("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")
 	require.NoError(t, err)
@@ -39,7 +39,7 @@ func TestSniffQUICChromium(t *testing.T) {
 	var metadata adapter.InboundContext
 	err = sniff.QUICClientHello(context.Background(), &metadata, pkt)
 	require.Equal(t, metadata.Protocol, C.ProtocolQUIC)
-	require.Equal(t, metadata.Client, C.ClientChromium)
+	require.Empty(t, metadata.Client)
 	require.ErrorIs(t, err, sniff.ErrNeedMoreData)
 	pkt, err = hex.DecodeString("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")
 	require.NoError(t, err)
@@ -56,7 +56,7 @@ func TestSniffUQUICChrome115(t *testing.T) {
 	err = sniff.QUICClientHello(context.Background(), &metadata, pkt)
 	require.NoError(t, err)
 	require.Equal(t, metadata.Protocol, C.ProtocolQUIC)
-	require.Equal(t, metadata.Client, C.ClientQUICGo)
+	require.Equal(t, metadata.Client, C.ClientChromium)
 	require.Equal(t, metadata.Domain, "www.google.com")
 }
 

common/srs/binary.go

@@ -215,16 +215,15 @@ func readDefaultRule(reader varbin.Reader, recover bool) (rule option.DefaultHea
 		case ruleItemWIFIBSSID:
 			rule.WIFIBSSID, err = readRuleItemString(reader)
 		case ruleItemAdGuardDomain:
-			if recover {
-				err = E.New("unable to decompile binary AdGuard rules to rule-set")
-				return
-			}
 			var matcher *domain.AdGuardMatcher
 			matcher, err = domain.ReadAdGuardMatcher(reader)
 			if err != nil {
 				return
 			}
 			rule.AdGuardDomainMatcher = matcher
+			if recover {
+				rule.AdGuardDomain = matcher.Dump()
+			}
 		case ruleItemNetworkType:
 			rule.NetworkType, err = readRuleItemUint8[option.InterfaceType](reader)
 		case ruleItemNetworkIsExpensive:

common/tls/acme.go

@@ -5,13 +5,13 @@ package tls
 import (
 	"context"
 	"crypto/tls"
-	"os"
 	"strings"
 
 	"github.com/sagernet/sing-box/adapter"
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/option"
 	E "github.com/sagernet/sing/common/exceptions"
+	"github.com/sagernet/sing/common/logger"
 
 	"github.com/caddyserver/certmagic"
 	"github.com/libdns/alidns"
@@ -37,7 +37,38 @@ func (w *acmeWrapper) Close() error {
 	return nil
 }
 
-func startACME(ctx context.Context, options option.InboundACMEOptions) (*tls.Config, adapter.SimpleLifecycle, error) {
+type acmeLogWriter struct {
+	logger logger.Logger
+}
+
+func (w *acmeLogWriter) Write(p []byte) (n int, err error) {
+	logLine := strings.ReplaceAll(string(p), "	", ": ")
+	switch {
+	case strings.HasPrefix(logLine, "error: "):
+		w.logger.Error(logLine[7:])
+	case strings.HasPrefix(logLine, "warn: "):
+		w.logger.Warn(logLine[6:])
+	case strings.HasPrefix(logLine, "info: "):
+		w.logger.Info(logLine[6:])
+	case strings.HasPrefix(logLine, "debug: "):
+		w.logger.Debug(logLine[7:])
+	default:
+		w.logger.Debug(logLine)
+	}
+	return len(p), nil
+}
+
+func (w *acmeLogWriter) Sync() error {
+	return nil
+}
+
+func encoderConfig() zapcore.EncoderConfig {
+	config := zap.NewProductionEncoderConfig()
+	config.TimeKey = zapcore.OmitKey
+	return config
+}
+
+func startACME(ctx context.Context, logger logger.Logger, options option.InboundACMEOptions) (*tls.Config, adapter.SimpleLifecycle, error) {
 	var acmeServer string
 	switch options.Provider {
 	case "", "letsencrypt":
@@ -58,14 +89,15 @@ func startACME(ctx context.Context, options option.InboundACMEOptions) (*tls.Con
 	} else {
 		storage = certmagic.Default.Storage
 	}
+	zapLogger := zap.New(zapcore.NewCore(
+		zapcore.NewConsoleEncoder(encoderConfig()),
+		&acmeLogWriter{logger: logger},
+		zap.DebugLevel,
+	))
 	config := &certmagic.Config{
 		DefaultServerName: options.DefaultServerName,
 		Storage:           storage,
-		Logger: zap.New(zapcore.NewCore(
-			zapcore.NewConsoleEncoder(zap.NewProductionEncoderConfig()),
-			os.Stderr,
-			zap.InfoLevel,
-		)),
+		Logger:            zapLogger,
 	}
 	acmeConfig := certmagic.ACMEIssuer{
 		CA:                      acmeServer,
@@ -75,7 +107,7 @@ func startACME(ctx context.Context, options option.InboundACMEOptions) (*tls.Con
 		DisableTLSALPNChallenge: options.DisableTLSALPNChallenge,
 		AltHTTPPort:             int(options.AlternativeHTTPPort),
 		AltTLSALPNPort:          int(options.AlternativeTLSPort),
-		Logger:                  config.Logger,
+		Logger:                  zapLogger,
 	}
 	if dnsOptions := options.DNS01Challenge; dnsOptions != nil && dnsOptions.Provider != "" {
 		var solver certmagic.DNS01Solver
@@ -103,6 +135,7 @@ func startACME(ctx context.Context, options option.InboundACMEOptions) (*tls.Con
 		GetConfigForCert: func(certificate certmagic.Certificate) (*certmagic.Config, error) {
 			return config, nil
 		},
+		Logger: zapLogger,
 	})
 	config = certmagic.New(cache, *config)
 	var tlsConfig *tls.Config

common/tls/acme_stub.go

@@ -9,8 +9,9 @@ import (
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/option"
 	E "github.com/sagernet/sing/common/exceptions"
+	"github.com/sagernet/sing/common/logger"
 )
 
-func startACME(ctx context.Context, options option.InboundACMEOptions) (*tls.Config, adapter.SimpleLifecycle, error) {
+func startACME(ctx context.Context, logger logger.Logger, options option.InboundACMEOptions) (*tls.Config, adapter.SimpleLifecycle, error) {
 	return nil, nil, E.New(`ACME is not included in this build, rebuild with -tags with_acme`)
 }

common/tls/client.go

@@ -53,26 +53,48 @@ func ClientHandshake(ctx context.Context, conn net.Conn, config Config) (Conn, e
 	return tlsConn, nil
 }
 
-type Dialer struct {
+type Dialer interface {
+	N.Dialer
+	DialTLSContext(ctx context.Context, destination M.Socksaddr) (Conn, error)
+}
+
+type defaultDialer struct {
 	dialer N.Dialer
 	config Config
 }
 
-func NewDialer(dialer N.Dialer, config Config) N.Dialer {
-	return &Dialer{dialer, config}
+func NewDialer(dialer N.Dialer, config Config) Dialer {
+	return &defaultDialer{dialer, config}
 }
 
-func (d *Dialer) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
-	if network != N.NetworkTCP {
+func (d *defaultDialer) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
+	if N.NetworkName(network) != N.NetworkTCP {
 		return nil, os.ErrInvalid
 	}
-	conn, err := d.dialer.DialContext(ctx, network, destination)
+	return d.DialTLSContext(ctx, destination)
+}
+
+func (d *defaultDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
+	return nil, os.ErrInvalid
+}
+
+func (d *defaultDialer) DialTLSContext(ctx context.Context, destination M.Socksaddr) (Conn, error) {
+	return d.dialContext(ctx, destination)
+}
+
+func (d *defaultDialer) dialContext(ctx context.Context, destination M.Socksaddr) (Conn, error) {
+	conn, err := d.dialer.DialContext(ctx, N.NetworkTCP, destination)
 	if err != nil {
 		return nil, err
 	}
-	return ClientHandshake(ctx, conn, d.config)
+	tlsConn, err := aTLS.ClientHandshake(ctx, conn, d.config)
+	if err != nil {
+		conn.Close()
+		return nil, err
+	}
+	return tlsConn, nil
 }
 
-func (d *Dialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
-	return nil, os.ErrInvalid
+func (d *defaultDialer) Upstream() any {
+	return d.dialer
 }

common/tls/ech.go

@@ -25,7 +25,7 @@ import (
 	"golang.org/x/crypto/cryptobyte"
 )
 
-func parseECHClientConfig(ctx context.Context, options option.OutboundTLSOptions, tlsConfig *tls.Config) (Config, error) {
+func parseECHClientConfig(ctx context.Context, clientConfig ECHCapableConfig, options option.OutboundTLSOptions) (Config, error) {
 	var echConfig []byte
 	if len(options.ECH.Config) > 0 {
 		echConfig = []byte(strings.Join(options.ECH.Config, "\n"))
@@ -45,12 +45,12 @@ func parseECHClientConfig(ctx context.Context, options option.OutboundTLSOptions
 		if block == nil || block.Type != "ECH CONFIGS" || len(rest) > 0 {
 			return nil, E.New("invalid ECH configs pem")
 		}
-		tlsConfig.EncryptedClientHelloConfigList = block.Bytes
-		return &STDClientConfig{tlsConfig}, nil
+		clientConfig.SetECHConfigList(block.Bytes)
+		return clientConfig, nil
 	} else {
-		return &STDECHClientConfig{
-			STDClientConfig: STDClientConfig{tlsConfig},
-			dnsRouter:       service.FromContext[adapter.DNSRouter](ctx),
+		return &ECHClientConfig{
+			ECHCapableConfig: clientConfig,
+			dnsRouter:        service.FromContext[adapter.DNSRouter](ctx),
 		}, nil
 	}
 }
@@ -69,11 +69,7 @@ func parseECHServerConfig(ctx context.Context, options option.InboundTLSOptions,
 	} else {
 		return E.New("missing ECH keys")
 	}
-	block, rest := pem.Decode(echKey)
-	if block == nil || block.Type != "ECH KEYS" || len(rest) > 0 {
-		return E.New("invalid ECH keys pem")
-	}
-	echKeys, err := UnmarshalECHKeys(block.Bytes)
+	echKeys, err := parseECHKeys(echKey)
 	if err != nil {
 		return E.Cause(err, "parse ECH keys")
 	}
@@ -85,32 +81,40 @@ func parseECHServerConfig(ctx context.Context, options option.InboundTLSOptions,
 	return nil
 }
 
-func reloadECHKeys(echKeyPath string, tlsConfig *tls.Config) error {
-	echKey, err := os.ReadFile(echKeyPath)
+func (c *STDServerConfig) setECHServerConfig(echKey []byte) error {
+	echKeys, err := parseECHKeys(echKey)
 	if err != nil {
-		return E.Cause(err, "reload ECH keys from ", echKeyPath)
+		return err
 	}
-	block, _ := pem.Decode(echKey)
-	if block == nil || block.Type != "ECH KEYS" {
-		return E.New("invalid ECH keys pem")
-	}
-	echKeys, err := UnmarshalECHKeys(block.Bytes)
-	if err != nil {
-		return E.Cause(err, "parse ECH keys")
-	}
-	tlsConfig.EncryptedClientHelloKeys = echKeys
+	c.access.Lock()
+	config := c.config.Clone()
+	config.EncryptedClientHelloKeys = echKeys
+	c.config = config
+	c.access.Unlock()
 	return nil
 }
 
-type STDECHClientConfig struct {
-	STDClientConfig
+func parseECHKeys(echKey []byte) ([]tls.EncryptedClientHelloKey, error) {
+	block, _ := pem.Decode(echKey)
+	if block == nil || block.Type != "ECH KEYS" {
+		return nil, E.New("invalid ECH keys pem")
+	}
+	echKeys, err := UnmarshalECHKeys(block.Bytes)
+	if err != nil {
+		return nil, E.Cause(err, "parse ECH keys")
+	}
+	return echKeys, nil
+}
+
+type ECHClientConfig struct {
+	ECHCapableConfig
 	access     sync.Mutex
 	dnsRouter  adapter.DNSRouter
 	lastTTL    time.Duration
 	lastUpdate time.Time
 }
 
-func (s *STDECHClientConfig) ClientHandshake(ctx context.Context, conn net.Conn) (aTLS.Conn, error) {
+func (s *ECHClientConfig) ClientHandshake(ctx context.Context, conn net.Conn) (aTLS.Conn, error) {
 	tlsConn, err := s.fetchAndHandshake(ctx, conn)
 	if err != nil {
 		return nil, err
@@ -122,17 +126,17 @@ func (s *STDECHClientConfig) ClientHandshake(ctx context.Context, conn net.Conn)
 	return tlsConn, nil
 }
 
-func (s *STDECHClientConfig) fetchAndHandshake(ctx context.Context, conn net.Conn) (aTLS.Conn, error) {
+func (s *ECHClientConfig) fetchAndHandshake(ctx context.Context, conn net.Conn) (aTLS.Conn, error) {
 	s.access.Lock()
 	defer s.access.Unlock()
-	if len(s.config.EncryptedClientHelloConfigList) == 0 || s.lastTTL == 0 || time.Now().Sub(s.lastUpdate) > s.lastTTL {
+	if len(s.ECHConfigList()) == 0 || s.lastTTL == 0 || time.Since(s.lastUpdate) > s.lastTTL {
 		message := &mDNS.Msg{
 			MsgHdr: mDNS.MsgHdr{
 				RecursionDesired: true,
 			},
 			Question: []mDNS.Question{
 				{
-					Name:   mDNS.Fqdn(s.config.ServerName),
+					Name:   mDNS.Fqdn(s.ServerName()),
 					Qtype:  mDNS.TypeHTTPS,
 					Qclass: mDNS.ClassINET,
 				},
@@ -157,21 +161,21 @@ func (s *STDECHClientConfig) fetchAndHandshake(ctx context.Context, conn net.Con
 						}
 						s.lastTTL = time.Duration(rr.Header().Ttl) * time.Second
 						s.lastUpdate = time.Now()
-						s.config.EncryptedClientHelloConfigList = echConfigList
+						s.SetECHConfigList(echConfigList)
 						break match
 					}
 				}
 			}
 		}
-		if len(s.config.EncryptedClientHelloConfigList) == 0 {
+		if len(s.ECHConfigList()) == 0 {
 			return nil, E.New("no ECH config found in DNS records")
 		}
 	}
 	return s.Client(conn)
 }
 
-func (s *STDECHClientConfig) Clone() Config {
-	return &STDECHClientConfig{STDClientConfig: STDClientConfig{s.config.Clone()}, dnsRouter: s.dnsRouter, lastUpdate: s.lastUpdate}
+func (s *ECHClientConfig) Clone() Config {
+	return &ECHClientConfig{ECHCapableConfig: s.ECHCapableConfig.Clone().(ECHCapableConfig), dnsRouter: s.dnsRouter, lastUpdate: s.lastUpdate}
 }
 
 func UnmarshalECHKeys(raw []byte) ([]tls.EncryptedClientHelloKey, error) {

common/tls/ech_keygen.go

@@ -1,155 +0,0 @@
-package tls
-
-import (
-	"bytes"
-	"encoding/binary"
-	"encoding/pem"
-
-	E "github.com/sagernet/sing/common/exceptions"
-
-	"github.com/cloudflare/circl/hpke"
-	"github.com/cloudflare/circl/kem"
-)
-
-func ECHKeygenDefault(serverName string) (configPem string, keyPem string, err error) {
-	cipherSuites := []echCipherSuite{
-		{
-			kdf:  hpke.KDF_HKDF_SHA256,
-			aead: hpke.AEAD_AES128GCM,
-		}, {
-			kdf:  hpke.KDF_HKDF_SHA256,
-			aead: hpke.AEAD_ChaCha20Poly1305,
-		},
-	}
-	keyConfig := []myECHKeyConfig{
-		{id: 0, kem: hpke.KEM_X25519_HKDF_SHA256},
-	}
-
-	keyPairs, err := echKeygen(0xfe0d, serverName, keyConfig, cipherSuites)
-	if err != nil {
-		return
-	}
-
-	var configBuffer bytes.Buffer
-	var totalLen uint16
-	for _, keyPair := range keyPairs {
-		totalLen += uint16(len(keyPair.rawConf))
-	}
-	binary.Write(&configBuffer, binary.BigEndian, totalLen)
-	for _, keyPair := range keyPairs {
-		configBuffer.Write(keyPair.rawConf)
-	}
-
-	var keyBuffer bytes.Buffer
-	for _, keyPair := range keyPairs {
-		keyBuffer.Write(keyPair.rawKey)
-	}
-
-	configPem = string(pem.EncodeToMemory(&pem.Block{Type: "ECH CONFIGS", Bytes: configBuffer.Bytes()}))
-	keyPem = string(pem.EncodeToMemory(&pem.Block{Type: "ECH KEYS", Bytes: keyBuffer.Bytes()}))
-	return
-}
-
-type echKeyConfigPair struct {
-	id      uint8
-	rawKey  []byte
-	conf    myECHKeyConfig
-	rawConf []byte
-}
-
-type echCipherSuite struct {
-	kdf  hpke.KDF
-	aead hpke.AEAD
-}
-
-type myECHKeyConfig struct {
-	id   uint8
-	kem  hpke.KEM
-	seed []byte
-}
-
-func echKeygen(version uint16, serverName string, conf []myECHKeyConfig, suite []echCipherSuite) ([]echKeyConfigPair, error) {
-	be := binary.BigEndian
-	// prepare for future update
-	if version != 0xfe0d {
-		return nil, E.New("unsupported ECH version", version)
-	}
-
-	suiteBuf := make([]byte, 0, len(suite)*4+2)
-	suiteBuf = be.AppendUint16(suiteBuf, uint16(len(suite))*4)
-	for _, s := range suite {
-		if !s.kdf.IsValid() || !s.aead.IsValid() {
-			return nil, E.New("invalid HPKE cipher suite")
-		}
-		suiteBuf = be.AppendUint16(suiteBuf, uint16(s.kdf))
-		suiteBuf = be.AppendUint16(suiteBuf, uint16(s.aead))
-	}
-
-	pairs := []echKeyConfigPair{}
-	for _, c := range conf {
-		pair := echKeyConfigPair{}
-		pair.id = c.id
-		pair.conf = c
-
-		if !c.kem.IsValid() {
-			return nil, E.New("invalid HPKE KEM")
-		}
-
-		kpGenerator := c.kem.Scheme().GenerateKeyPair
-		if len(c.seed) > 0 {
-			kpGenerator = func() (kem.PublicKey, kem.PrivateKey, error) {
-				pub, sec := c.kem.Scheme().DeriveKeyPair(c.seed)
-				return pub, sec, nil
-			}
-			if len(c.seed) < c.kem.Scheme().PrivateKeySize() {
-				return nil, E.New("HPKE KEM seed too short")
-			}
-		}
-
-		pub, sec, err := kpGenerator()
-		if err != nil {
-			return nil, E.Cause(err, "generate ECH config key pair")
-		}
-		b := []byte{}
-		b = be.AppendUint16(b, version)
-		b = be.AppendUint16(b, 0) // length field
-		// contents
-		// key config
-		b = append(b, c.id)
-		b = be.AppendUint16(b, uint16(c.kem))
-		pubBuf, err := pub.MarshalBinary()
-		if err != nil {
-			return nil, E.Cause(err, "serialize ECH public key")
-		}
-		b = be.AppendUint16(b, uint16(len(pubBuf)))
-		b = append(b, pubBuf...)
-
-		b = append(b, suiteBuf...)
-		// end key config
-		// max name len, not supported
-		b = append(b, 0)
-		// server name
-		b = append(b, byte(len(serverName)))
-		b = append(b, []byte(serverName)...)
-		// extensions, not supported
-		b = be.AppendUint16(b, 0)
-
-		be.PutUint16(b[2:], uint16(len(b)-4))
-
-		pair.rawConf = b
-
-		secBuf, err := sec.MarshalBinary()
-		if err != nil {
-			return nil, E.Cause(err, "serialize ECH private key")
-		}
-		sk := []byte{}
-		sk = be.AppendUint16(sk, uint16(len(secBuf)))
-		sk = append(sk, secBuf...)
-		sk = be.AppendUint16(sk, uint16(len(b)))
-		sk = append(sk, b...)
-		pair.rawKey = sk
-
-		pairs = append(pairs, pair)
-	}
-	return pairs, nil
-}

common/tls/ech_shared.go

@@ -0,0 +1,81 @@
+package tls
+
+import (
+	"crypto/ecdh"
+	"crypto/rand"
+	"encoding/pem"
+
+	"golang.org/x/crypto/cryptobyte"
+)
+
+type ECHCapableConfig interface {
+	Config
+	ECHConfigList() []byte
+	SetECHConfigList([]byte)
+}
+
+func ECHKeygenDefault(publicName string) (configPem string, keyPem string, err error) {
+	echKey, err := ecdh.X25519().GenerateKey(rand.Reader)
+	if err != nil {
+		return
+	}
+	echConfig, err := marshalECHConfig(0, echKey.PublicKey().Bytes(), publicName, 0)
+	if err != nil {
+		return
+	}
+	configBuilder := cryptobyte.NewBuilder(nil)
+	configBuilder.AddUint16LengthPrefixed(func(builder *cryptobyte.Builder) {
+		builder.AddBytes(echConfig)
+	})
+	configBytes, err := configBuilder.Bytes()
+	if err != nil {
+		return
+	}
+	keyBuilder := cryptobyte.NewBuilder(nil)
+	keyBuilder.AddUint16LengthPrefixed(func(builder *cryptobyte.Builder) {
+		builder.AddBytes(echKey.Bytes())
+	})
+	keyBuilder.AddUint16LengthPrefixed(func(builder *cryptobyte.Builder) {
+		builder.AddBytes(echConfig)
+	})
+	keyBytes, err := keyBuilder.Bytes()
+	if err != nil {
+		return
+	}
+	configPem = string(pem.EncodeToMemory(&pem.Block{Type: "ECH CONFIGS", Bytes: configBytes}))
+	keyPem = string(pem.EncodeToMemory(&pem.Block{Type: "ECH KEYS", Bytes: keyBytes}))
+	return
+}
+
+func marshalECHConfig(id uint8, pubKey []byte, publicName string, maxNameLen uint8) ([]byte, error) {
+	const extensionEncryptedClientHello = 0xfe0d
+	const DHKEM_X25519_HKDF_SHA256 = 0x0020
+	const KDF_HKDF_SHA256 = 0x0001
+	builder := cryptobyte.NewBuilder(nil)
+	builder.AddUint16(extensionEncryptedClientHello)
+	builder.AddUint16LengthPrefixed(func(builder *cryptobyte.Builder) {
+		builder.AddUint8(id)
+
+		builder.AddUint16(DHKEM_X25519_HKDF_SHA256) // The only DHKEM we support
+		builder.AddUint16LengthPrefixed(func(builder *cryptobyte.Builder) {
+			builder.AddBytes(pubKey)
+		})
+		builder.AddUint16LengthPrefixed(func(builder *cryptobyte.Builder) {
+			const (
+				AEAD_AES_128_GCM      = 0x0001
+				AEAD_AES_256_GCM      = 0x0002
+				AEAD_ChaCha20Poly1305 = 0x0003
+			)
+			for _, aeadID := range []uint16{AEAD_AES_128_GCM, AEAD_AES_256_GCM, AEAD_ChaCha20Poly1305} {
+				builder.AddUint16(KDF_HKDF_SHA256) // The only KDF we support
+				builder.AddUint16(aeadID)
+			}
+		})
+		builder.AddUint8(maxNameLen)
+		builder.AddUint8LengthPrefixed(func(builder *cryptobyte.Builder) {
+			builder.AddBytes([]byte(publicName))
+		})
+		builder.AddUint16(0) // extensions
+	})
+	return builder.Bytes()
+}

common/tls/ech_stub.go

@@ -10,7 +10,7 @@ import (
 	E "github.com/sagernet/sing/common/exceptions"
 )
 
-func parseECHClientConfig(ctx context.Context, options option.OutboundTLSOptions, tlsConfig *tls.Config) (Config, error) {
+func parseECHClientConfig(ctx context.Context, clientConfig ECHCapableConfig, options option.OutboundTLSOptions) (Config, error) {
 	return nil, E.New("ECH requires go1.24, please recompile your binary.")
 }
 
@@ -18,6 +18,6 @@ func parseECHServerConfig(ctx context.Context, options option.InboundTLSOptions,
 	return E.New("ECH requires go1.24, please recompile your binary.")
 }
 
-func reloadECHKeys(echKeyPath string, tlsConfig *tls.Config) error {
-	return E.New("ECH requires go1.24, please recompile your binary.")
+func (c *STDServerConfig) setECHServerConfig(echKey []byte) error {
+	panic("unreachable")
 }

common/tls/reality_client.go

@@ -74,7 +74,7 @@ func NewRealityClient(ctx context.Context, serverAddress string, options option.
 	if decodedLen > 8 {
 		return nil, E.New("invalid short_id")
 	}
-	return &RealityClientConfig{ctx, uClient, publicKey, shortID}, nil
+	return &RealityClientConfig{ctx, uClient.(*UTLSClientConfig), publicKey, shortID}, nil
 }
 
 func (e *RealityClientConfig) ServerName() string {
@@ -307,3 +307,11 @@ func (c *realityClientConnWrapper) Upstream() any {
 func (c *realityClientConnWrapper) CloseWrite() error {
 	return c.Close()
 }
+
+func (c *realityClientConnWrapper) ReaderReplaceable() bool {
+	return true
+}
+
+func (c *realityClientConnWrapper) WriterReplaceable() bool {
+	return true
+}

common/tls/reality_server.go

@@ -206,3 +206,11 @@ func (c *realityConnWrapper) Upstream() any {
 func (c *realityConnWrapper) CloseWrite() error {
 	return c.Close()
 }
+
+func (c *realityConnWrapper) ReaderReplaceable() bool {
+	return true
+}
+
+func (c *realityConnWrapper) WriterReplaceable() bool {
+	return true
+}

common/tls/std_client.go

@@ -7,43 +7,60 @@ import (
 	"net"
 	"os"
 	"strings"
+	"time"
 
 	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/common/tlsfragment"
 	"github.com/sagernet/sing-box/option"
 	E "github.com/sagernet/sing/common/exceptions"
 	"github.com/sagernet/sing/common/ntp"
 )
 
 type STDClientConfig struct {
-	config *tls.Config
+	ctx                   context.Context
+	config                *tls.Config
+	fragment              bool
+	fragmentFallbackDelay time.Duration
+	recordFragment        bool
 }
 
-func (s *STDClientConfig) ServerName() string {
-	return s.config.ServerName
+func (c *STDClientConfig) ServerName() string {
+	return c.config.ServerName
 }
 
-func (s *STDClientConfig) SetServerName(serverName string) {
-	s.config.ServerName = serverName
+func (c *STDClientConfig) SetServerName(serverName string) {
+	c.config.ServerName = serverName
 }
 
-func (s *STDClientConfig) NextProtos() []string {
-	return s.config.NextProtos
+func (c *STDClientConfig) NextProtos() []string {
+	return c.config.NextProtos
 }
 
-func (s *STDClientConfig) SetNextProtos(nextProto []string) {
-	s.config.NextProtos = nextProto
+func (c *STDClientConfig) SetNextProtos(nextProto []string) {
+	c.config.NextProtos = nextProto
 }
 
-func (s *STDClientConfig) Config() (*STDConfig, error) {
-	return s.config, nil
+func (c *STDClientConfig) Config() (*STDConfig, error) {
+	return c.config, nil
 }
 
-func (s *STDClientConfig) Client(conn net.Conn) (Conn, error) {
-	return tls.Client(conn, s.config), nil
+func (c *STDClientConfig) Client(conn net.Conn) (Conn, error) {
+	if c.recordFragment {
+		conn = tf.NewConn(conn, c.ctx, c.fragment, c.recordFragment, c.fragmentFallbackDelay)
+	}
+	return tls.Client(conn, c.config), nil
 }
 
-func (s *STDClientConfig) Clone() Config {
-	return &STDClientConfig{s.config.Clone()}
+func (c *STDClientConfig) Clone() Config {
+	return &STDClientConfig{c.ctx, c.config.Clone(), c.fragment, c.fragmentFallbackDelay, c.recordFragment}
+}
+
+func (c *STDClientConfig) ECHConfigList() []byte {
+	return c.config.EncryptedClientHelloConfigList
+}
+
+func (c *STDClientConfig) SetECHConfigList(EncryptedClientHelloConfigList []byte) {
+	c.config.EncryptedClientHelloConfigList = EncryptedClientHelloConfigList
 }
 
 func NewSTDClient(ctx context.Context, serverAddress string, options option.OutboundTLSOptions) (Config, error) {
@@ -60,9 +77,7 @@ func NewSTDClient(ctx context.Context, serverAddress string, options option.Outb
 	var tlsConfig tls.Config
 	tlsConfig.Time = ntp.TimeFuncFromContext(ctx)
 	tlsConfig.RootCAs = adapter.RootPoolFromContext(ctx)
-	if options.DisableSNI {
-		tlsConfig.ServerName = "127.0.0.1"
-	} else {
+	if !options.DisableSNI {
 		tlsConfig.ServerName = serverName
 	}
 	if options.Insecure {
@@ -71,12 +86,16 @@ func NewSTDClient(ctx context.Context, serverAddress string, options option.Outb
 		tlsConfig.InsecureSkipVerify = true
 		tlsConfig.VerifyConnection = func(state tls.ConnectionState) error {
 			verifyOptions := x509.VerifyOptions{
+				Roots:         tlsConfig.RootCAs,
 				DNSName:       serverName,
 				Intermediates: x509.NewCertPool(),
 			}
 			for _, cert := range state.PeerCertificates[1:] {
 				verifyOptions.Intermediates.AddCert(cert)
 			}
+			if tlsConfig.Time != nil {
+				verifyOptions.CurrentTime = tlsConfig.Time()
+			}
 			_, err := state.PeerCertificates[0].Verify(verifyOptions)
 			return err
 		}
@@ -127,8 +146,10 @@ func NewSTDClient(ctx context.Context, serverAddress string, options option.Outb
 		}
 		tlsConfig.RootCAs = certPool
 	}
+	stdConfig := &STDClientConfig{ctx, &tlsConfig, options.Fragment, time.Duration(options.FragmentFallbackDelay), options.RecordFragment}
 	if options.ECH != nil && options.ECH.Enabled {
-		return parseECHClientConfig(ctx, options, &tlsConfig)
+		return parseECHClientConfig(ctx, stdConfig, options)
+	} else {
+		return stdConfig, nil
 	}
-	return &STDClientConfig{&tlsConfig}, nil
 }

common/tls/std_server.go

@@ -6,6 +6,7 @@ import (
 	"net"
 	"os"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/sagernet/fswatch"
@@ -20,6 +21,7 @@ import (
 var errInsecureUnused = E.New("tls: insecure unused")
 
 type STDServerConfig struct {
+	access          sync.RWMutex
 	config          *tls.Config
 	logger          log.Logger
 	acmeService     adapter.SimpleLifecycle
@@ -32,14 +34,22 @@ type STDServerConfig struct {
 }
 
 func (c *STDServerConfig) ServerName() string {
+	c.access.RLock()
+	defer c.access.RUnlock()
 	return c.config.ServerName
 }
 
 func (c *STDServerConfig) SetServerName(serverName string) {
-	c.config.ServerName = serverName
+	c.access.Lock()
+	defer c.access.Unlock()
+	config := c.config.Clone()
+	config.ServerName = serverName
+	c.config = config
 }
 
 func (c *STDServerConfig) NextProtos() []string {
+	c.access.RLock()
+	defer c.access.RUnlock()
 	if c.acmeService != nil && len(c.config.NextProtos) > 1 && c.config.NextProtos[0] == ACMETLS1Protocol {
 		return c.config.NextProtos[1:]
 	} else {
@@ -48,11 +58,15 @@ func (c *STDServerConfig) NextProtos() []string {
 }
 
 func (c *STDServerConfig) SetNextProtos(nextProto []string) {
+	c.access.Lock()
+	defer c.access.Unlock()
+	config := c.config.Clone()
 	if c.acmeService != nil && len(c.config.NextProtos) > 1 && c.config.NextProtos[0] == ACMETLS1Protocol {
-		c.config.NextProtos = append(c.config.NextProtos[:1], nextProto...)
+		config.NextProtos = append(c.config.NextProtos[:1], nextProto...)
 	} else {
-		c.config.NextProtos = nextProto
+		config.NextProtos = nextProto
 	}
+	c.config = config
 }
 
 func (c *STDServerConfig) Config() (*STDConfig, error) {
@@ -77,9 +91,6 @@ func (c *STDServerConfig) Start() error {
 	if c.acmeService != nil {
 		return c.acmeService.Start()
 	} else {
-		if c.certificatePath == "" && c.keyPath == "" {
-			return nil
-		}
 		err := c.startWatcher()
 		if err != nil {
 			c.logger.Warn("create fsnotify watcher: ", err)
@@ -99,6 +110,9 @@ func (c *STDServerConfig) startWatcher() error {
 	if c.echKeyPath != "" {
 		watchPath = append(watchPath, c.echKeyPath)
 	}
+	if len(watchPath) == 0 {
+		return nil
+	}
 	watcher, err := fswatch.NewWatcher(fswatch.Options{
 		Path: watchPath,
 		Callback: func(path string) {
@@ -138,10 +152,18 @@ func (c *STDServerConfig) certificateUpdated(path string) error {
 		if err != nil {
 			return E.Cause(err, "reload key pair")
 		}
-		c.config.Certificates = []tls.Certificate{keyPair}
+		c.access.Lock()
+		config := c.config.Clone()
+		config.Certificates = []tls.Certificate{keyPair}
+		c.config = config
+		c.access.Unlock()
 		c.logger.Info("reloaded TLS certificate")
 	} else if path == c.echKeyPath {
-		err := reloadECHKeys(c.echKeyPath, c.config)
+		echKey, err := os.ReadFile(c.echKeyPath)
+		if err != nil {
+			return E.Cause(err, "reload ECH keys from ", c.echKeyPath)
+		}
+		err = c.setECHServerConfig(echKey)
 		if err != nil {
 			return err
 		}
@@ -169,7 +191,7 @@ func NewSTDServer(ctx context.Context, logger log.Logger, options option.Inbound
 	var err error
 	if options.ACME != nil && len(options.ACME.Domain) > 0 {
 		//nolint:staticcheck
-		tlsConfig, acmeService, err = startACME(ctx, common.PtrValueOrDefault(options.ACME))
+		tlsConfig, acmeService, err = startACME(ctx, logger, common.PtrValueOrDefault(options.ACME))
 		if err != nil {
 			return nil, err
 		}
@@ -262,7 +284,7 @@ func NewSTDServer(ctx context.Context, logger log.Logger, options option.Inbound
 			return nil, err
 		}
 	}
-	return &STDServerConfig{
+	serverConfig := &STDServerConfig{
 		config:          tlsConfig,
 		logger:          logger,
 		acmeService:     acmeService,
@@ -271,5 +293,11 @@ func NewSTDServer(ctx context.Context, logger log.Logger, options option.Inbound
 		certificatePath: options.CertificatePath,
 		keyPath:         options.KeyPath,
 		echKeyPath:      echKeyPath,
-	}, nil
+	}
+	serverConfig.config.GetConfigForClient = func(info *tls.ClientHelloInfo) (*tls.Config, error) {
+		serverConfig.access.Lock()
+		defer serverConfig.access.Unlock()
+		return serverConfig.config, nil
+	}
+	return serverConfig, nil
 }

common/tls/time_wrapper.go

@@ -11,10 +11,13 @@ type TimeServiceWrapper struct {
 }
 
 func (w *TimeServiceWrapper) TimeFunc() func() time.Time {
-	if w.TimeService == nil {
-		return nil
+	return func() time.Time {
+		if w.TimeService != nil {
+			return w.TimeService.TimeFunc()()
+		} else {
+			return time.Now()
+		}
 	}
-	return w.TimeService.TimeFunc()
 }
 
 func (w *TimeServiceWrapper) Upstream() any {

common/tls/utls_client.go

@@ -8,11 +8,12 @@ import (
 	"crypto/x509"
 	"math/rand"
 	"net"
-	"net/netip"
 	"os"
 	"strings"
+	"time"
 
 	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/common/tlsfragment"
 	"github.com/sagernet/sing-box/option"
 	E "github.com/sagernet/sing/common/exceptions"
 	"github.com/sagernet/sing/common/ntp"
@@ -22,46 +23,60 @@ import (
 )
 
 type UTLSClientConfig struct {
-	config *utls.Config
-	id     utls.ClientHelloID
+	ctx                   context.Context
+	config                *utls.Config
+	id                    utls.ClientHelloID
+	fragment              bool
+	fragmentFallbackDelay time.Duration
+	recordFragment        bool
 }
 
-func (e *UTLSClientConfig) ServerName() string {
-	return e.config.ServerName
+func (c *UTLSClientConfig) ServerName() string {
+	return c.config.ServerName
 }
 
-func (e *UTLSClientConfig) SetServerName(serverName string) {
-	e.config.ServerName = serverName
+func (c *UTLSClientConfig) SetServerName(serverName string) {
+	c.config.ServerName = serverName
 }
 
-func (e *UTLSClientConfig) NextProtos() []string {
-	return e.config.NextProtos
+func (c *UTLSClientConfig) NextProtos() []string {
+	return c.config.NextProtos
 }
 
-func (e *UTLSClientConfig) SetNextProtos(nextProto []string) {
+func (c *UTLSClientConfig) SetNextProtos(nextProto []string) {
 	if len(nextProto) == 1 && nextProto[0] == http2.NextProtoTLS {
 		nextProto = append(nextProto, "http/1.1")
 	}
-	e.config.NextProtos = nextProto
+	c.config.NextProtos = nextProto
 }
 
-func (e *UTLSClientConfig) Config() (*STDConfig, error) {
+func (c *UTLSClientConfig) Config() (*STDConfig, error) {
 	return nil, E.New("unsupported usage for uTLS")
 }
 
-func (e *UTLSClientConfig) Client(conn net.Conn) (Conn, error) {
-	return &utlsALPNWrapper{utlsConnWrapper{utls.UClient(conn, e.config.Clone(), e.id)}, e.config.NextProtos}, nil
-}
-
-func (e *UTLSClientConfig) SetSessionIDGenerator(generator func(clientHello []byte, sessionID []byte) error) {
-	e.config.SessionIDGenerator = generator
-}
-
-func (e *UTLSClientConfig) Clone() Config {
-	return &UTLSClientConfig{
-		config: e.config.Clone(),
-		id:     e.id,
+func (c *UTLSClientConfig) Client(conn net.Conn) (Conn, error) {
+	if c.recordFragment {
+		conn = tf.NewConn(conn, c.ctx, c.fragment, c.recordFragment, c.fragmentFallbackDelay)
 	}
+	return &utlsALPNWrapper{utlsConnWrapper{utls.UClient(conn, c.config.Clone(), c.id)}, c.config.NextProtos}, nil
+}
+
+func (c *UTLSClientConfig) SetSessionIDGenerator(generator func(clientHello []byte, sessionID []byte) error) {
+	c.config.SessionIDGenerator = generator
+}
+
+func (c *UTLSClientConfig) Clone() Config {
+	return &UTLSClientConfig{
+		c.ctx, c.config.Clone(), c.id, c.fragment, c.fragmentFallbackDelay, c.recordFragment,
+	}
+}
+
+func (c *UTLSClientConfig) ECHConfigList() []byte {
+	return c.config.EncryptedClientHelloConfigList
+}
+
+func (c *UTLSClientConfig) SetECHConfigList(EncryptedClientHelloConfigList []byte) {
+	c.config.EncryptedClientHelloConfigList = EncryptedClientHelloConfigList
 }
 
 type utlsConnWrapper struct {
@@ -91,6 +106,14 @@ func (c *utlsConnWrapper) Upstream() any {
 	return c.UConn
 }
 
+func (c *utlsConnWrapper) ReaderReplaceable() bool {
+	return true
+}
+
+func (c *utlsConnWrapper) WriterReplaceable() bool {
+	return true
+}
+
 type utlsALPNWrapper struct {
 	utlsConnWrapper
 	nextProtocols []string
@@ -116,14 +139,12 @@ func (c *utlsALPNWrapper) HandshakeContext(ctx context.Context) error {
 	return c.UConn.HandshakeContext(ctx)
 }
 
-func NewUTLSClient(ctx context.Context, serverAddress string, options option.OutboundTLSOptions) (*UTLSClientConfig, error) {
+func NewUTLSClient(ctx context.Context, serverAddress string, options option.OutboundTLSOptions) (Config, error) {
 	var serverName string
 	if options.ServerName != "" {
 		serverName = options.ServerName
 	} else if serverAddress != "" {
-		if _, err := netip.ParseAddr(serverName); err != nil {
-			serverName = serverAddress
-		}
+		serverName = serverAddress
 	}
 	if serverName == "" && !options.Insecure {
 		return nil, E.New("missing server_name or insecure=true")
@@ -132,15 +153,16 @@ func NewUTLSClient(ctx context.Context, serverAddress string, options option.Out
 	var tlsConfig utls.Config
 	tlsConfig.Time = ntp.TimeFuncFromContext(ctx)
 	tlsConfig.RootCAs = adapter.RootPoolFromContext(ctx)
-	if options.DisableSNI {
-		tlsConfig.ServerName = "127.0.0.1"
-	} else {
+	if !options.DisableSNI {
 		tlsConfig.ServerName = serverName
 	}
 	if options.Insecure {
 		tlsConfig.InsecureSkipVerify = options.Insecure
 	} else if options.DisableSNI {
-		return nil, E.New("disable_sni is unsupported in uTLS")
+		if options.Reality != nil && options.Reality.Enabled {
+			return nil, E.New("disable_sni is unsupported in reality")
+		}
+		tlsConfig.InsecureServerNameToVerify = serverName
 	}
 	if len(options.ALPN) > 0 {
 		tlsConfig.NextProtos = options.ALPN
@@ -192,7 +214,15 @@ func NewUTLSClient(ctx context.Context, serverAddress string, options option.Out
 	if err != nil {
 		return nil, err
 	}
-	return &UTLSClientConfig{&tlsConfig, id}, nil
+	uConfig := &UTLSClientConfig{ctx, &tlsConfig, id, options.Fragment, time.Duration(options.FragmentFallbackDelay), options.RecordFragment}
+	if options.ECH != nil && options.ECH.Enabled {
+		if options.Reality != nil && options.Reality.Enabled {
+			return nil, E.New("Reality is conflict with ECH")
+		}
+		return parseECHClientConfig(ctx, uConfig, options)
+	} else {
+		return uConfig, nil
+	}
 }
 
 var (
@@ -220,7 +250,7 @@ func init() {
 
 func uTLSClientHelloID(name string) (utls.ClientHelloID, error) {
 	switch name {
-	case "chrome_psk", "chrome_psk_shuffle", "chrome_padding_psk_shuffle", "chrome_pq":
+	case "chrome_psk", "chrome_psk_shuffle", "chrome_padding_psk_shuffle", "chrome_pq", "chrome_pq_psk":
 		fallthrough
 	case "chrome", "":
 		return utls.HelloChrome_Auto, nil

common/tlsfragment/conn.go

@@ -9,6 +9,7 @@ import (
 	"strings"
 	"time"
 
+	C "github.com/sagernet/sing-box/constant"
 	N "github.com/sagernet/sing/common/network"
 
 	"golang.org/x/net/publicsuffix"
@@ -19,16 +20,21 @@ type Conn struct {
 	tcpConn            *net.TCPConn
 	ctx                context.Context
 	firstPacketWritten bool
+	splitPacket        bool
 	splitRecord        bool
 	fallbackDelay      time.Duration
 }
 
-func NewConn(conn net.Conn, ctx context.Context, splitRecord bool, fallbackDelay time.Duration) *Conn {
+func NewConn(conn net.Conn, ctx context.Context, splitPacket bool, splitRecord bool, fallbackDelay time.Duration) *Conn {
+	if fallbackDelay == 0 {
+		fallbackDelay = C.TLSFragmentFallbackDelay
+	}
 	tcpConn, _ := N.UnwrapReader(conn).(*net.TCPConn)
 	return &Conn{
 		Conn:          conn,
 		tcpConn:       tcpConn,
 		ctx:           ctx,
+		splitPacket:   splitPacket,
 		splitRecord:   splitRecord,
 		fallbackDelay: fallbackDelay,
 	}
@@ -39,9 +45,9 @@ func (c *Conn) Write(b []byte) (n int, err error) {
 		defer func() {
 			c.firstPacketWritten = true
 		}()
-		serverName := indexTLSServerName(b)
+		serverName := IndexTLSServerName(b)
 		if serverName != nil {
-			if !c.splitRecord {
+			if c.splitPacket {
 				if c.tcpConn != nil {
 					err = c.tcpConn.SetNoDelay(true)
 					if err != nil {
@@ -81,33 +87,44 @@ func (c *Conn) Write(b []byte) (n int, err error) {
 					payload = b[splitIndexes[i-1]:splitIndexes[i]]
 				}
 				if c.splitRecord {
+					if c.splitPacket {
+						buffer.Reset()
+					}
 					payloadLen := uint16(len(payload))
 					buffer.Write(b[:3])
 					binary.Write(&buffer, binary.BigEndian, payloadLen)
 					buffer.Write(payload)
-				} else if c.tcpConn != nil && i != len(splitIndexes) {
-					err = writeAndWaitAck(c.ctx, c.tcpConn, payload, c.fallbackDelay)
-					if err != nil {
-						return
+					if c.splitPacket {
+						payload = buffer.Bytes()
 					}
-				} else {
-					_, err = c.Conn.Write(payload)
-					if err != nil {
-						return
+				}
+				if c.splitPacket {
+					if c.tcpConn != nil && i != len(splitIndexes) {
+						err = writeAndWaitAck(c.ctx, c.tcpConn, payload, c.fallbackDelay)
+						if err != nil {
+							return
+						}
+					} else {
+						_, err = c.Conn.Write(payload)
+						if err != nil {
+							return
+						}
+						if i != len(splitIndexes) {
+							time.Sleep(c.fallbackDelay)
+						}
 					}
 				}
 			}
-			if c.splitRecord {
+			if c.splitRecord && !c.splitPacket {
 				_, err = c.Conn.Write(buffer.Bytes())
 				if err != nil {
 					return
 				}
-			} else {
-				if c.tcpConn != nil {
-					err = c.tcpConn.SetNoDelay(false)
-					if err != nil {
-						return
-					}
+			}
+			if c.tcpConn != nil {
+				err = c.tcpConn.SetNoDelay(false)
+				if err != nil {
+					return
 				}
 			}
 			return len(b), nil

common/tlsfragment/conn_test.go

@@ -15,7 +15,7 @@ func TestTLSFragment(t *testing.T) {
 	t.Parallel()
 	tcpConn, err := net.Dial("tcp", "1.1.1.1:443")
 	require.NoError(t, err)
-	tlsConn := tls.Client(tf.NewConn(tcpConn, context.Background(), false, 0), &tls.Config{
+	tlsConn := tls.Client(tf.NewConn(tcpConn, context.Background(), true, false, 0), &tls.Config{
 		ServerName: "www.cloudflare.com",
 	})
 	require.NoError(t, tlsConn.Handshake())
@@ -25,7 +25,17 @@ func TestTLSRecordFragment(t *testing.T) {
 	t.Parallel()
 	tcpConn, err := net.Dial("tcp", "1.1.1.1:443")
 	require.NoError(t, err)
-	tlsConn := tls.Client(tf.NewConn(tcpConn, context.Background(), true, 0), &tls.Config{
+	tlsConn := tls.Client(tf.NewConn(tcpConn, context.Background(), false, true, 0), &tls.Config{
+		ServerName: "www.cloudflare.com",
+	})
+	require.NoError(t, tlsConn.Handshake())
+}
+
+func TestTLS2Fragment(t *testing.T) {
+	t.Parallel()
+	tcpConn, err := net.Dial("tcp", "1.1.1.1:443")
+	require.NoError(t, err)
+	tlsConn := tls.Client(tf.NewConn(tcpConn, context.Background(), true, true, 0), &tls.Config{
 		ServerName: "www.cloudflare.com",
 	})
 	require.NoError(t, tlsConn.Handshake())

common/tlsfragment/index.go

@@ -22,13 +22,13 @@ const (
 	tls13                   uint16 = 0x0304
 )
 
-type myServerName struct {
+type MyServerName struct {
 	Index      int
 	Length     int
 	ServerName string
 }
 
-func indexTLSServerName(payload []byte) *myServerName {
+func IndexTLSServerName(payload []byte) *MyServerName {
 	if len(payload) < recordLayerHeaderLen || payload[0] != contentType {
 		return nil
 	}
@@ -36,47 +36,48 @@ func indexTLSServerName(payload []byte) *myServerName {
 	if len(payload) < recordLayerHeaderLen+int(segmentLen) {
 		return nil
 	}
-	serverName := indexTLSServerNameFromHandshake(payload[recordLayerHeaderLen : recordLayerHeaderLen+int(segmentLen)])
+	serverName := indexTLSServerNameFromHandshake(payload[recordLayerHeaderLen:])
 	if serverName == nil {
 		return nil
 	}
-	serverName.Length += recordLayerHeaderLen
+	serverName.Index += recordLayerHeaderLen
 	return serverName
 }
 
-func indexTLSServerNameFromHandshake(hs []byte) *myServerName {
-	if len(hs) < handshakeHeaderLen+randomDataLen+sessionIDHeaderLen {
+func indexTLSServerNameFromHandshake(handshake []byte) *MyServerName {
+	if len(handshake) < handshakeHeaderLen+randomDataLen+sessionIDHeaderLen {
 		return nil
 	}
-	if hs[0] != handshakeType {
+	if handshake[0] != handshakeType {
 		return nil
 	}
-	handshakeLen := uint32(hs[1])<<16 | uint32(hs[2])<<8 | uint32(hs[3])
-	if len(hs[4:]) != int(handshakeLen) {
+	handshakeLen := uint32(handshake[1])<<16 | uint32(handshake[2])<<8 | uint32(handshake[3])
+	if len(handshake[4:]) != int(handshakeLen) {
 		return nil
 	}
-	tlsVersion := uint16(hs[4])<<8 | uint16(hs[5])
+	tlsVersion := uint16(handshake[4])<<8 | uint16(handshake[5])
 	if tlsVersion&tlsVersionBitmask != 0x0300 && tlsVersion != tls13 {
 		return nil
 	}
-	sessionIDLen := hs[38]
-	if len(hs) < handshakeHeaderLen+randomDataLen+sessionIDHeaderLen+int(sessionIDLen) {
+	sessionIDLen := handshake[38]
+	currentIndex := handshakeHeaderLen + randomDataLen + sessionIDHeaderLen + int(sessionIDLen)
+	if len(handshake) < currentIndex {
 		return nil
 	}
-	cs := hs[handshakeHeaderLen+randomDataLen+sessionIDHeaderLen+int(sessionIDLen):]
-	if len(cs) < cipherSuiteHeaderLen {
+	cipherSuites := handshake[currentIndex:]
+	if len(cipherSuites) < cipherSuiteHeaderLen {
 		return nil
 	}
-	csLen := uint16(cs[0])<<8 | uint16(cs[1])
-	if len(cs) < cipherSuiteHeaderLen+int(csLen)+compressMethodHeaderLen {
+	csLen := uint16(cipherSuites[0])<<8 | uint16(cipherSuites[1])
+	if len(cipherSuites) < cipherSuiteHeaderLen+int(csLen)+compressMethodHeaderLen {
 		return nil
 	}
-	compressMethodLen := uint16(cs[cipherSuiteHeaderLen+int(csLen)])
-	if len(cs) < cipherSuiteHeaderLen+int(csLen)+compressMethodHeaderLen+int(compressMethodLen) {
+	compressMethodLen := uint16(cipherSuites[cipherSuiteHeaderLen+int(csLen)])
+	currentIndex += cipherSuiteHeaderLen + int(csLen) + compressMethodHeaderLen + int(compressMethodLen)
+	if len(handshake) < currentIndex {
 		return nil
 	}
-	currentIndex := cipherSuiteHeaderLen + int(csLen) + compressMethodHeaderLen + int(compressMethodLen)
-	serverName := indexTLSServerNameFromExtensions(cs[currentIndex:])
+	serverName := indexTLSServerNameFromExtensions(handshake[currentIndex:])
 	if serverName == nil {
 		return nil
 	}
@@ -84,7 +85,7 @@ func indexTLSServerNameFromHandshake(hs []byte) *myServerName {
 	return serverName
 }
 
-func indexTLSServerNameFromExtensions(exs []byte) *myServerName {
+func indexTLSServerNameFromExtensions(exs []byte) *MyServerName {
 	if len(exs) == 0 {
 		return nil
 	}
@@ -118,7 +119,8 @@ func indexTLSServerNameFromExtensions(exs []byte) *myServerName {
 			}
 			sniLen := uint16(sex[3])<<8 | uint16(sex[4])
 			sex = sex[sniExtensionHeaderLen:]
-			return &myServerName{
+
+			return &MyServerName{
 				Index:      currentIndex + extensionHeaderLen + sniExtensionHeaderLen,
 				Length:     int(sniLen),
 				ServerName: string(sex),

common/tlsfragment/index_test.go

@@ -0,0 +1,20 @@
+package tf_test
+
+import (
+	"encoding/hex"
+	"testing"
+
+	"github.com/sagernet/sing-box/common/tlsfragment"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestIndexTLSServerName(t *testing.T) {
+	t.Parallel()
+	payload, err := hex.DecodeString("16030105f8010005f403036e35de7389a679c54029cf452611f2211c70d9ac3897271de589ab6155f8e4ab20637d225f1ef969ad87ed78bfb9d171300bcb1703b6f314ccefb964f79b7d0961002a0a0a130213031301c02cc02bcca9c030c02fcca8c00ac009c014c013009d009c0035002fc008c012000a01000581baba00000000000f000d00000a6769746875622e636f6d00170000ff01000100000a000e000c3a3a11ec001d001700180019000b000201000010000e000c02683208687474702f312e31000500050100000000000d00160014040308040401050308050805050108060601020100120000003304ef04ed3a3a00010011ec04c0aeb2250c092a3463161cccb29d9183331a424964248579507ed23a180b0ceab2a5f5d9ce41547e497a89055471ea572867ba3a1fc3c9e45025274a20f60c6b60e62476b6afed0403af59ab83660ef4112ae20386a602010d0a5d454c0ed34c84ed4423e750213e6a2baab1bf9c4367a6007ab40a33d95220c2dcaa44f257024a5626b545db0510f4311b1a60714154909c6a61fdfca011fb2626d657aeb6070bf078508babe3b584555013e34acc56198ed4663742b3155a664a9901794c4586820a7dc162c01827291f3792e1237f801a8d1ef096013c181c4a58d2f6859ba75022d18cc4418bd4f351d5c18f83a58857d05af860c4b9ac018a5b63f17184e591532c6bc2cf2215d4a282c8a8a4f6f7aee110422c8bc9ebd3b1d609c568523aaae555db320e6c269473d87af38c256cbb9febc20aea6380c32a8916f7a373c8b1e37554e3260bf6621f6b804ee80b3c516b1d01985bf4c603b6daa9a5991de6a7a29f3a7122b8afb843a7660110fce62b43c615f5bcc2db688ba012649c0952b0a2c031e732d2b454c6b2968683cb8d244be2c9a7fa163222979eaf92722b92b862d81a3d94450c2b60c318421ebb4307c42d1f0473592a5c30e42039cc68cda9721e61aa63f49def17c15221680ed444896340133bbee67556f56b9f9d78a4df715f926a12add0cc9c862e46ea8b7316ae468282c18601b2771c9c9322f982228cf93effaacd3f80cbd12bce5fc36f56e2a3caf91e578a5fae00c9b23a8ed1a66764f4433c3628a70b8f0a6196adc60a4cb4226f07ba4c6b363fe9065563bfc1347452946386bab488686e837ab979c64f9047417fca635fe1bb4f074f256cc8af837c7b455e280426547755af90a61640169ef180aea3a77e662bb6dac1b6c3696027129b1a5edf495314e9c7f4b6110e16378ec893fa24642330a40aba1a85326101acb97c620fd8d71389e69eaed7bdb01bbe1fd428d66191150c7b2cd1ad4257391676a82ba8ce07fb2667c3b289f159003a7c7bc31d361b7b7f49a802961739d950dfcc0fa1c7abce5abdd2245101da391151490862028110465950b9e9c03d08a90998ab83267838d2e74a0593bc81f74cdf734519a05b351c0e5488c68dd810e6e9142ccc1e2f4a7f464297eb340e27acc6b9d64e12e38cce8492b3d939140b5a9e149a75597f10a23874c84323a07cdd657274378f887c85c4259b9c04cd33ba58ed630ef2a744f8e19dd34843dff331d2a6be7e2332c599289cd248a611c73d7481cd4a9bd43449a3836f14b2af18a1739e17999e4c67e85cc5bcecabb14185e5bcaff3c96098f03dc5aba819f29587758f49f940585354a2a780830528d68ccd166920dadcaa25cab5fc1907272a826aba3f08bc6b88757776812ecb6c7cec69a223ec0a13a7b62a2349a0f63ed7a27a3b15ba21d71fe6864ec6e089ae17cadd433fa3138f7ee24353c11365818f8fc34f43a05542d18efaac24bfccc1f748a0cc1a67ad379468b76fd34973dba785f5c91d618333cd810fe0700d1bbc8422029782628070a624c52c5309a4a64d625b11f8033ab28df34a1add297517fcc06b92b6817b3c5144438cf260867c57bde68c8c4b82e6a135ef676a52fbae5708002a404e6189a60e2836de565ad1b29e3819e5ed49f6810bcb28e1bd6de57306f94b79d9dae1cc4624d2a068499beef81cd5fe4b76dcbfff2a2008001d002001976128c6d5a934533f28b9914d2480aab2a8c1ab03d212529ce8b27640a716002d00020101002b000706caca03040303001b00030200015a5a000100")
+	require.NoError(t, err)
+	serverName := tf.IndexTLSServerName(payload)
+	require.NotNil(t, serverName)
+	require.Equal(t, serverName.ServerName, string(payload[serverName.Index:serverName.Index+serverName.Length]))
+	require.Equal(t, "github.com", serverName.ServerName)
+}

common/tlsfragment/wait_stub.go

@@ -9,6 +9,10 @@ import (
 )
 
 func writeAndWaitAck(ctx context.Context, conn *net.TCPConn, payload []byte, fallbackDelay time.Duration) error {
+	_, err := conn.Write(payload)
+	if err != nil {
+		return err
+	}
 	time.Sleep(fallbackDelay)
 	return nil
 }

common/tlsfragment/wait_windows.go

@@ -16,6 +16,9 @@ func writeAndWaitAck(ctx context.Context, conn *net.TCPConn, payload []byte, fal
 	err := winiphlpapi.WriteAndWaitAck(ctx, conn, payload)
 	if err != nil {
 		if errors.Is(err, windows.ERROR_ACCESS_DENIED) {
+			if _, err := conn.Write(payload); err != nil {
+				return err
+			}
 			time.Sleep(fallbackDelay)
 			return nil
 		}

common/urltest/urltest.go

@@ -47,15 +47,15 @@ func (s *HistoryStorage) LoadURLTestHistory(tag string) *adapter.URLTestHistory
 func (s *HistoryStorage) DeleteURLTestHistory(tag string) {
 	s.access.Lock()
 	delete(s.delayHistory, tag)
-	s.access.Unlock()
 	s.notifyUpdated()
+	s.access.Unlock()
 }
 
 func (s *HistoryStorage) StoreURLTestHistory(tag string, history *adapter.URLTestHistory) {
 	s.access.Lock()
 	s.delayHistory[tag] = history
-	s.access.Unlock()
 	s.notifyUpdated()
+	s.access.Unlock()
 }
 
 func (s *HistoryStorage) notifyUpdated() {
@@ -69,6 +69,8 @@ func (s *HistoryStorage) notifyUpdated() {
 }
 
 func (s *HistoryStorage) Close() error {
+	s.access.Lock()
+	defer s.access.Unlock()
 	s.updateHook = nil
 	return nil
 }

dns/client.go

@@ -2,12 +2,14 @@ package dns
 
 import (
 	"context"
+	"errors"
 	"net"
 	"net/netip"
 	"strings"
 	"time"
 
 	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/common/compatible"
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing/common"
 	E "github.com/sagernet/sing/common/exceptions"
@@ -17,7 +19,7 @@ import (
 	"github.com/sagernet/sing/contrab/freelru"
 	"github.com/sagernet/sing/contrab/maphash"
 
-	dns "github.com/miekg/dns"
+	"github.com/miekg/dns"
 )
 
 var (
@@ -30,15 +32,18 @@ var (
 var _ adapter.DNSClient = (*Client)(nil)
 
 type Client struct {
-	timeout          time.Duration
-	disableCache     bool
-	disableExpire    bool
-	independentCache bool
-	rdrc             adapter.RDRCStore
-	initRDRCFunc     func() adapter.RDRCStore
-	logger           logger.ContextLogger
-	cache            freelru.Cache[dns.Question, *dns.Msg]
-	transportCache   freelru.Cache[transportCacheKey, *dns.Msg]
+	timeout            time.Duration
+	disableCache       bool
+	disableExpire      bool
+	independentCache   bool
+	clientSubnet       netip.Prefix
+	rdrc               adapter.RDRCStore
+	initRDRCFunc       func() adapter.RDRCStore
+	logger             logger.ContextLogger
+	cache              freelru.Cache[dns.Question, *dns.Msg]
+	cacheLock          compatible.Map[dns.Question, chan struct{}]
+	transportCache     freelru.Cache[transportCacheKey, *dns.Msg]
+	transportCacheLock compatible.Map[dns.Question, chan struct{}]
 }
 
 type ClientOptions struct {
@@ -47,6 +52,7 @@ type ClientOptions struct {
 	DisableExpire    bool
 	IndependentCache bool
 	CacheCapacity    uint32
+	ClientSubnet     netip.Prefix
 	RDRC             func() adapter.RDRCStore
 	Logger           logger.ContextLogger
 }
@@ -57,6 +63,7 @@ func NewClient(options ClientOptions) *Client {
 		disableCache:     options.DisableCache,
 		disableExpire:    options.DisableExpire,
 		independentCache: options.IndependentCache,
+		clientSubnet:     options.ClientSubnet,
 		initRDRCFunc:     options.RDRC,
 		logger:           options.Logger,
 	}
@@ -88,31 +95,81 @@ func (c *Client) Start() {
 	}
 }
 
+func extractNegativeTTL(response *dns.Msg) (uint32, bool) {
+	for _, record := range response.Ns {
+		if soa, isSOA := record.(*dns.SOA); isSOA {
+			soaTTL := soa.Header().Ttl
+			soaMinimum := soa.Minttl
+			if soaTTL < soaMinimum {
+				return soaTTL, true
+			}
+			return soaMinimum, true
+		}
+	}
+	return 0, false
+}
+
 func (c *Client) Exchange(ctx context.Context, transport adapter.DNSTransport, message *dns.Msg, options adapter.DNSQueryOptions, responseChecker func(responseAddrs []netip.Addr) bool) (*dns.Msg, error) {
 	if len(message.Question) == 0 {
 		if c.logger != nil {
 			c.logger.WarnContext(ctx, "bad question size: ", len(message.Question))
 		}
-		responseMessage := dns.Msg{
-			MsgHdr: dns.MsgHdr{
-				Id:       message.Id,
-				Response: true,
-				Rcode:    dns.RcodeFormatError,
-			},
-			Question: message.Question,
-		}
-		return &responseMessage, nil
+		return FixedResponseStatus(message, dns.RcodeFormatError), nil
 	}
 	question := message.Question[0]
-	if options.ClientSubnet.IsValid() {
-		message = SetClientSubnet(message, options.ClientSubnet)
+	if question.Qtype == dns.TypeA && options.Strategy == C.DomainStrategyIPv6Only || question.Qtype == dns.TypeAAAA && options.Strategy == C.DomainStrategyIPv4Only {
+		if c.logger != nil {
+			c.logger.DebugContext(ctx, "strategy rejected")
+		}
+		return FixedResponseStatus(message, dns.RcodeSuccess), nil
 	}
+	clientSubnet := options.ClientSubnet
+	if !clientSubnet.IsValid() {
+		clientSubnet = c.clientSubnet
+	}
+	if clientSubnet.IsValid() {
+		message = SetClientSubnet(message, clientSubnet)
+	}
+
 	isSimpleRequest := len(message.Question) == 1 &&
 		len(message.Ns) == 0 &&
-		len(message.Extra) == 0 &&
+		(len(message.Extra) == 0 || len(message.Extra) == 1 &&
+			message.Extra[0].Header().Rrtype == dns.TypeOPT &&
+			message.Extra[0].Header().Class > 0 &&
+			message.Extra[0].Header().Ttl == 0 &&
+			len(message.Extra[0].(*dns.OPT).Option) == 0) &&
 		!options.ClientSubnet.IsValid()
 	disableCache := !isSimpleRequest || c.disableCache || options.DisableCache
 	if !disableCache {
+		if c.cache != nil {
+			cond, loaded := c.cacheLock.LoadOrStore(question, make(chan struct{}))
+			if loaded {
+				select {
+				case <-cond:
+				case <-ctx.Done():
+					return nil, ctx.Err()
+				}
+			} else {
+				defer func() {
+					c.cacheLock.Delete(question)
+					close(cond)
+				}()
+			}
+		} else if c.transportCache != nil {
+			cond, loaded := c.transportCacheLock.LoadOrStore(question, make(chan struct{}))
+			if loaded {
+				select {
+				case <-cond:
+				case <-ctx.Done():
+					return nil, ctx.Err()
+				}
+			} else {
+				defer func() {
+					c.transportCacheLock.Delete(question)
+					close(cond)
+				}()
+			}
+		}
 		response, ttl := c.loadResponse(question, transport)
 		if response != nil {
 			logCachedResponse(c.logger, ctx, response, ttl)
@@ -120,27 +177,14 @@ func (c *Client) Exchange(ctx context.Context, transport adapter.DNSTransport, m
 			return response, nil
 		}
 	}
-	if question.Qtype == dns.TypeA && options.Strategy == C.DomainStrategyIPv6Only || question.Qtype == dns.TypeAAAA && options.Strategy == C.DomainStrategyIPv4Only {
-		responseMessage := dns.Msg{
-			MsgHdr: dns.MsgHdr{
-				Id:       message.Id,
-				Response: true,
-				Rcode:    dns.RcodeSuccess,
-			},
-			Question: []dns.Question{question},
-		}
-		if c.logger != nil {
-			c.logger.DebugContext(ctx, "strategy rejected")
-		}
-		return &responseMessage, nil
-	}
+
 	messageId := message.Id
 	contextTransport, clientSubnetLoaded := transportTagFromContext(ctx)
 	if clientSubnetLoaded && transport.Tag() == contextTransport {
 		return nil, E.New("DNS query loopback in transport[", contextTransport, "]")
 	}
 	ctx = contextWithTransportTag(ctx, transport.Tag())
-	if responseChecker != nil && c.rdrc != nil {
+	if !disableCache && responseChecker != nil && c.rdrc != nil {
 		rejected := c.rdrc.LoadRDRC(transport.Tag(), question.Name, question.Qtype)
 		if rejected {
 			return nil, ErrResponseRejectedCached
@@ -150,7 +194,12 @@ func (c *Client) Exchange(ctx context.Context, transport adapter.DNSTransport, m
 	response, err := transport.Exchange(ctx, message)
 	cancel()
 	if err != nil {
-		return nil, err
+		var rcodeError RcodeError
+		if errors.As(err, &rcodeError) {
+			response = FixedResponseStatus(message, int(rcodeError))
+		} else {
+			return nil, err
+		}
 	}
 	/*if question.Qtype == dns.TypeA || question.Qtype == dns.TypeAAAA {
 		validResponse := response
@@ -187,10 +236,19 @@ func (c *Client) Exchange(ctx context.Context, transport adapter.DNSTransport, m
 			response.Answer = append(response.Answer, validResponse.Answer...)
 		}
 	}*/
+	disableCache = disableCache || (response.Rcode != dns.RcodeSuccess && response.Rcode != dns.RcodeNameError)
 	if responseChecker != nil {
-		addr, addrErr := MessageToAddresses(response)
-		if addrErr != nil || !responseChecker(addr) {
-			if c.rdrc != nil {
+		var rejected bool
+		// TODO: add accept_any rule and support to check response instead of addresses
+		if response.Rcode != dns.RcodeSuccess && response.Rcode != dns.RcodeNameError {
+			rejected = true
+		} else if len(response.Answer) == 0 {
+			rejected = !responseChecker(nil)
+		} else {
+			rejected = !responseChecker(MessageToAddresses(response))
+		}
+		if rejected {
+			if !disableCache && c.rdrc != nil {
 				c.rdrc.SaveRDRCAsync(transport.Tag(), question.Name, question.Qtype, c.logger)
 			}
 			logRejectedResponse(c.logger, ctx, response)
@@ -217,10 +275,17 @@ func (c *Client) Exchange(ctx context.Context, transport adapter.DNSTransport, m
 		}
 	}
 	var timeToLive uint32
-	for _, recordList := range [][]dns.RR{response.Answer, response.Ns, response.Extra} {
-		for _, record := range recordList {
-			if timeToLive == 0 || record.Header().Ttl > 0 && record.Header().Ttl < timeToLive {
-				timeToLive = record.Header().Ttl
+	if len(response.Answer) == 0 {
+		if soaTTL, hasSOA := extractNegativeTTL(response); hasSOA {
+			timeToLive = soaTTL
+		}
+	}
+	if timeToLive == 0 {
+		for _, recordList := range [][]dns.RR{response.Answer, response.Ns, response.Extra} {
+			for _, record := range recordList {
+				if timeToLive == 0 || record.Header().Ttl > 0 && record.Header().Ttl < timeToLive {
+					timeToLive = record.Header().Ttl
+				}
 			}
 		}
 	}
@@ -247,7 +312,7 @@ func (c *Client) Exchange(ctx context.Context, transport adapter.DNSTransport, m
 		}
 	}
 	logExchangedResponse(c.logger, ctx, response, timeToLive)
-	return response, err
+	return response, nil
 }
 
 func (c *Client) Lookup(ctx context.Context, transport adapter.DNSTransport, domain string, options adapter.DNSQueryOptions, responseChecker func(responseAddrs []netip.Addr) bool) ([]netip.Addr, error) {
@@ -293,70 +358,11 @@ func (c *Client) Lookup(ctx context.Context, transport adapter.DNSTransport, dom
 func (c *Client) ClearCache() {
 	if c.cache != nil {
 		c.cache.Purge()
-	}
-	if c.transportCache != nil {
+	} else if c.transportCache != nil {
 		c.transportCache.Purge()
 	}
 }
 
-func (c *Client) LookupCache(domain string, strategy C.DomainStrategy) ([]netip.Addr, bool) {
-	if c.disableCache || c.independentCache {
-		return nil, false
-	}
-	if dns.IsFqdn(domain) {
-		domain = domain[:len(domain)-1]
-	}
-	dnsName := dns.Fqdn(domain)
-	if strategy == C.DomainStrategyIPv4Only {
-		response, err := c.questionCache(dns.Question{
-			Name:   dnsName,
-			Qtype:  dns.TypeA,
-			Qclass: dns.ClassINET,
-		}, nil)
-		if err != ErrNotCached {
-			return response, true
-		}
-	} else if strategy == C.DomainStrategyIPv6Only {
-		response, err := c.questionCache(dns.Question{
-			Name:   dnsName,
-			Qtype:  dns.TypeAAAA,
-			Qclass: dns.ClassINET,
-		}, nil)
-		if err != ErrNotCached {
-			return response, true
-		}
-	} else {
-		response4, _ := c.questionCache(dns.Question{
-			Name:   dnsName,
-			Qtype:  dns.TypeA,
-			Qclass: dns.ClassINET,
-		}, nil)
-		response6, _ := c.questionCache(dns.Question{
-			Name:   dnsName,
-			Qtype:  dns.TypeAAAA,
-			Qclass: dns.ClassINET,
-		}, nil)
-		if len(response4) > 0 || len(response6) > 0 {
-			return sortAddresses(response4, response6, strategy), true
-		}
-	}
-	return nil, false
-}
-
-func (c *Client) ExchangeCache(ctx context.Context, message *dns.Msg) (*dns.Msg, bool) {
-	if c.disableCache || c.independentCache || len(message.Question) != 1 {
-		return nil, false
-	}
-	question := message.Question[0]
-	response, ttl := c.loadResponse(question, nil)
-	if response == nil {
-		return nil, false
-	}
-	logCachedResponse(c.logger, ctx, response, ttl)
-	response.Id = message.Id
-	return response, true
-}
-
 func sortAddresses(response4 []netip.Addr, response6 []netip.Addr, strategy C.DomainStrategy) []netip.Addr {
 	if strategy == C.DomainStrategyPreferIPv6 {
 		return append(response6, response4...)
@@ -378,15 +384,15 @@ func (c *Client) storeCache(transport adapter.DNSTransport, question dns.Questio
 				transportTag: transport.Tag(),
 			}, message)
 		}
-		return
-	}
-	if !c.independentCache {
-		c.cache.AddWithLifetime(question, message, time.Second*time.Duration(timeToLive))
 	} else {
-		c.transportCache.AddWithLifetime(transportCacheKey{
-			Question:     question,
-			transportTag: transport.Tag(),
-		}, message, time.Second*time.Duration(timeToLive))
+		if !c.independentCache {
+			c.cache.AddWithLifetime(question, message, time.Second*time.Duration(timeToLive))
+		} else {
+			c.transportCache.AddWithLifetime(transportCacheKey{
+				Question:     question,
+				transportTag: transport.Tag(),
+			}, message, time.Second*time.Duration(timeToLive))
+		}
 	}
 }
 
@@ -413,7 +419,10 @@ func (c *Client) lookupToExchange(ctx context.Context, transport adapter.DNSTran
 	if err != nil {
 		return nil, err
 	}
-	return MessageToAddresses(response)
+	if response.Rcode != dns.RcodeSuccess {
+		return nil, RcodeError(response.Rcode)
+	}
+	return MessageToAddresses(response), nil
 }
 
 func (c *Client) questionCache(question dns.Question, transport adapter.DNSTransport) ([]netip.Addr, error) {
@@ -421,7 +430,10 @@ func (c *Client) questionCache(question dns.Question, transport adapter.DNSTrans
 	if response == nil {
 		return nil, ErrNotCached
 	}
-	return MessageToAddresses(response)
+	if response.Rcode != dns.RcodeSuccess {
+		return nil, RcodeError(response.Rcode)
+	}
+	return MessageToAddresses(response), nil
 }
 
 func (c *Client) loadResponse(question dns.Question, transport adapter.DNSTransport) (*dns.Msg, int) {
@@ -498,9 +510,9 @@ func (c *Client) loadResponse(question dns.Question, transport adapter.DNSTransp
 	}
 }
 
-func MessageToAddresses(response *dns.Msg) ([]netip.Addr, error) {
-	if response.Rcode != dns.RcodeSuccess {
-		return nil, RcodeError(response.Rcode)
+func MessageToAddresses(response *dns.Msg) []netip.Addr {
+	if response == nil || response.Rcode != dns.RcodeSuccess {
+		return nil
 	}
 	addresses := make([]netip.Addr, 0, len(response.Answer))
 	for _, rawAnswer := range response.Answer {
@@ -517,7 +529,7 @@ func MessageToAddresses(response *dns.Msg) ([]netip.Addr, error) {
 			}
 		}
 	}
-	return addresses, nil
+	return addresses
 }
 
 func wrapError(err error) error {
@@ -546,9 +558,12 @@ func transportTagFromContext(ctx context.Context) (string, bool) {
 func FixedResponseStatus(message *dns.Msg, rcode int) *dns.Msg {
 	return &dns.Msg{
 		MsgHdr: dns.MsgHdr{
-			Id:       message.Id,
-			Rcode:    rcode,
-			Response: true,
+			Id:                 message.Id,
+			Response:           true,
+			Authoritative:      true,
+			RecursionDesired:   true,
+			RecursionAvailable: true,
+			Rcode:              rcode,
 		},
 		Question: message.Question,
 	}

dns/client_truncate.go

@@ -15,8 +15,7 @@ func TruncateDNSMessage(request *dns.Msg, response *dns.Msg, headroom int) (*buf
 	}
 	responseLen := response.Len()
 	if responseLen > maxLen {
-		copyResponse := *response
-		response = &copyResponse
+		response = response.Copy()
 		response.Truncate(maxLen)
 	}
 	buffer := buf.NewSize(headroom*2 + 1 + responseLen)

dns/rcode.go

@@ -5,6 +5,7 @@ import (
 )
 
 const (
+	RcodeSuccess     RcodeError = mDNS.RcodeSuccess
 	RcodeFormatError RcodeError = mDNS.RcodeFormatError
 	RcodeNameError   RcodeError = mDNS.RcodeNameError
 	RcodeRefused     RcodeError = mDNS.RcodeRefused

dns/router.go

@@ -55,6 +55,7 @@ func NewRouter(ctx context.Context, logFactory log.Factory, options option.DNSOp
 		DisableExpire:    options.DNSClientOptions.DisableExpire,
 		IndependentCache: options.DNSClientOptions.IndependentCache,
 		CacheCapacity:    options.DNSClientOptions.CacheCapacity,
+		ClientSubnet:     options.DNSClientOptions.ClientSubnet.Build(netip.Prefix{}),
 		RDRC: func() adapter.RDRCStore {
 			cacheFile := service.FromContext[adapter.CacheFile](ctx)
 			if cacheFile == nil {
@@ -213,102 +214,89 @@ func (r *Router) Exchange(ctx context.Context, message *mDNS.Msg, options adapte
 	}
 	r.logger.DebugContext(ctx, "exchange ", FormatQuestion(message.Question[0].String()))
 	var (
+		response  *mDNS.Msg
 		transport adapter.DNSTransport
 		err       error
 	)
-	response, cached := r.client.ExchangeCache(ctx, message)
-	if !cached {
-		var metadata *adapter.InboundContext
-		ctx, metadata = adapter.ExtendContext(ctx)
-		metadata.Destination = M.Socksaddr{}
-		metadata.QueryType = message.Question[0].Qtype
-		switch metadata.QueryType {
-		case mDNS.TypeA:
-			metadata.IPVersion = 4
-		case mDNS.TypeAAAA:
-			metadata.IPVersion = 6
-		}
-		metadata.Domain = FqdnToDomain(message.Question[0].Name)
-		if options.Transport != nil {
-			transport = options.Transport
-			if legacyTransport, isLegacy := transport.(adapter.LegacyDNSTransport); isLegacy {
-				if options.Strategy == C.DomainStrategyAsIS {
-					options.Strategy = legacyTransport.LegacyStrategy()
-				}
-				if !options.ClientSubnet.IsValid() {
-					options.ClientSubnet = legacyTransport.LegacyClientSubnet()
-				}
-			}
+	var metadata *adapter.InboundContext
+	ctx, metadata = adapter.ExtendContext(ctx)
+	metadata.Destination = M.Socksaddr{}
+	metadata.QueryType = message.Question[0].Qtype
+	switch metadata.QueryType {
+	case mDNS.TypeA:
+		metadata.IPVersion = 4
+	case mDNS.TypeAAAA:
+		metadata.IPVersion = 6
+	}
+	metadata.Domain = FqdnToDomain(message.Question[0].Name)
+	if options.Transport != nil {
+		transport = options.Transport
+		if legacyTransport, isLegacy := transport.(adapter.LegacyDNSTransport); isLegacy {
 			if options.Strategy == C.DomainStrategyAsIS {
-				options.Strategy = r.defaultDomainStrategy
+				options.Strategy = legacyTransport.LegacyStrategy()
 			}
-			response, err = r.client.Exchange(ctx, transport, message, options, nil)
-		} else {
-			var (
-				rule      adapter.DNSRule
-				ruleIndex int
-			)
-			ruleIndex = -1
-			for {
-				dnsCtx := adapter.OverrideContext(ctx)
-				dnsOptions := options
-				transport, rule, ruleIndex = r.matchDNS(ctx, true, ruleIndex, isAddressQuery(message), &dnsOptions)
-				if rule != nil {
-					switch action := rule.Action().(type) {
-					case *R.RuleActionReject:
-						switch action.Method {
-						case C.RuleActionRejectMethodDefault:
-							return &mDNS.Msg{
-								MsgHdr: mDNS.MsgHdr{
-									Id:       message.Id,
-									Rcode:    mDNS.RcodeRefused,
-									Response: true,
-								},
-								Question: []mDNS.Question{message.Question[0]},
-							}, nil
-						case C.RuleActionRejectMethodDrop:
-							return nil, tun.ErrDrop
-						}
-					case *R.RuleActionPredefined:
-						return action.Response(message), nil
-					}
-				}
-				var responseCheck func(responseAddrs []netip.Addr) bool
-				if rule != nil && rule.WithAddressLimit() {
-					responseCheck = func(responseAddrs []netip.Addr) bool {
-						metadata.DestinationAddresses = responseAddrs
-						return rule.MatchAddressLimit(metadata)
-					}
-				}
-				if dnsOptions.Strategy == C.DomainStrategyAsIS {
-					dnsOptions.Strategy = r.defaultDomainStrategy
-				}
-				response, err = r.client.Exchange(dnsCtx, transport, message, dnsOptions, responseCheck)
-				var rejected bool
-				if err != nil {
-					if errors.Is(err, ErrResponseRejectedCached) {
-						rejected = true
-						r.logger.DebugContext(ctx, E.Cause(err, "response rejected for ", FormatQuestion(message.Question[0].String())), " (cached)")
-					} else if errors.Is(err, ErrResponseRejected) {
-						rejected = true
-						r.logger.DebugContext(ctx, E.Cause(err, "response rejected for ", FormatQuestion(message.Question[0].String())))
-						/*} else if responseCheck!= nil && errors.Is(err, RcodeError(mDNS.RcodeNameError)) {
-						rejected = true
-						r.logger.DebugContext(ctx, E.Cause(err, "response rejected for ", FormatQuestion(message.Question[0].String())))
-						*/
-					} else if len(message.Question) > 0 {
-						rejected = true
-						r.logger.ErrorContext(ctx, E.Cause(err, "exchange failed for ", FormatQuestion(message.Question[0].String())))
-					} else {
-						r.logger.ErrorContext(ctx, E.Cause(err, "exchange failed for <empty query>"))
-					}
-				}
-				if responseCheck != nil && rejected {
-					continue
-				}
-				break
+			if !options.ClientSubnet.IsValid() {
+				options.ClientSubnet = legacyTransport.LegacyClientSubnet()
 			}
 		}
+		if options.Strategy == C.DomainStrategyAsIS {
+			options.Strategy = r.defaultDomainStrategy
+		}
+		response, err = r.client.Exchange(ctx, transport, message, options, nil)
+	} else {
+		var (
+			rule      adapter.DNSRule
+			ruleIndex int
+		)
+		ruleIndex = -1
+		for {
+			dnsCtx := adapter.OverrideContext(ctx)
+			dnsOptions := options
+			transport, rule, ruleIndex = r.matchDNS(ctx, true, ruleIndex, isAddressQuery(message), &dnsOptions)
+			if rule != nil {
+				switch action := rule.Action().(type) {
+				case *R.RuleActionReject:
+					switch action.Method {
+					case C.RuleActionRejectMethodDefault:
+						return &mDNS.Msg{
+							MsgHdr: mDNS.MsgHdr{
+								Id:       message.Id,
+								Rcode:    mDNS.RcodeRefused,
+								Response: true,
+							},
+							Question: []mDNS.Question{message.Question[0]},
+						}, nil
+					case C.RuleActionRejectMethodDrop:
+						return nil, tun.ErrDrop
+					}
+				case *R.RuleActionPredefined:
+					return action.Response(message), nil
+				}
+			}
+			responseCheck := addressLimitResponseCheck(rule, metadata)
+			if dnsOptions.Strategy == C.DomainStrategyAsIS {
+				dnsOptions.Strategy = r.defaultDomainStrategy
+			}
+			response, err = r.client.Exchange(dnsCtx, transport, message, dnsOptions, responseCheck)
+			var rejected bool
+			if err != nil {
+				if errors.Is(err, ErrResponseRejectedCached) {
+					rejected = true
+					r.logger.DebugContext(ctx, E.Cause(err, "response rejected for ", FormatQuestion(message.Question[0].String())), " (cached)")
+				} else if errors.Is(err, ErrResponseRejected) {
+					rejected = true
+					r.logger.DebugContext(ctx, E.Cause(err, "response rejected for ", FormatQuestion(message.Question[0].String())))
+				} else if len(message.Question) > 0 {
+					r.logger.ErrorContext(ctx, E.Cause(err, "exchange failed for ", FormatQuestion(message.Question[0].String())))
+				} else {
+					r.logger.ErrorContext(ctx, E.Cause(err, "exchange failed for <empty query>"))
+				}
+			}
+			if responseCheck != nil && rejected {
+				continue
+			}
+			break
+		}
 	}
 	if err != nil {
 		return nil, err
@@ -331,7 +319,6 @@ func (r *Router) Exchange(ctx context.Context, message *mDNS.Msg, options adapte
 func (r *Router) Lookup(ctx context.Context, domain string, options adapter.DNSQueryOptions) ([]netip.Addr, error) {
 	var (
 		responseAddrs []netip.Addr
-		cached        bool
 		err           error
 	)
 	printResult := func() {
@@ -351,13 +338,6 @@ func (r *Router) Lookup(ctx context.Context, domain string, options adapter.DNSQ
 			err = E.Cause(err, "lookup ", domain)
 		}
 	}
-	responseAddrs, cached = r.client.LookupCache(domain, options.Strategy)
-	if cached {
-		if len(responseAddrs) == 0 {
-			return nil, E.New("lookup ", domain, ": empty result (cached)")
-		}
-		return responseAddrs, nil
-	}
 	r.logger.DebugContext(ctx, "lookup domain ", domain)
 	ctx, metadata := adapter.ExtendContext(ctx)
 	metadata.Destination = M.Socksaddr{}
@@ -390,16 +370,13 @@ func (r *Router) Lookup(ctx context.Context, domain string, options adapter.DNSQ
 			if rule != nil {
 				switch action := rule.Action().(type) {
 				case *R.RuleActionReject:
-					switch action.Method {
-					case C.RuleActionRejectMethodDefault:
-						return nil, nil
-					case C.RuleActionRejectMethodDrop:
-						return nil, tun.ErrDrop
-					}
+					return nil, &R.RejectedError{Cause: action.Error(ctx)}
 				case *R.RuleActionPredefined:
+					responseAddrs = nil
 					if action.Rcode != mDNS.RcodeSuccess {
 						err = RcodeError(action.Rcode)
 					} else {
+						err = nil
 						for _, answer := range action.Answer {
 							switch record := answer.(type) {
 							case *mDNS.A:
@@ -412,13 +389,7 @@ func (r *Router) Lookup(ctx context.Context, domain string, options adapter.DNSQ
 					goto response
 				}
 			}
-			var responseCheck func(responseAddrs []netip.Addr) bool
-			if rule != nil && rule.WithAddressLimit() {
-				responseCheck = func(responseAddrs []netip.Addr) bool {
-					metadata.DestinationAddresses = responseAddrs
-					return rule.MatchAddressLimit(metadata)
-				}
-			}
+			responseCheck := addressLimitResponseCheck(rule, metadata)
 			if dnsOptions.Strategy == C.DomainStrategyAsIS {
 				dnsOptions.Strategy = r.defaultDomainStrategy
 			}
@@ -446,6 +417,18 @@ func isAddressQuery(message *mDNS.Msg) bool {
 	return false
 }
 
+func addressLimitResponseCheck(rule adapter.DNSRule, metadata *adapter.InboundContext) func(responseAddrs []netip.Addr) bool {
+	if rule == nil || !rule.WithAddressLimit() {
+		return nil
+	}
+	responseMetadata := *metadata
+	return func(responseAddrs []netip.Addr) bool {
+		checkMetadata := responseMetadata
+		checkMetadata.DestinationAddresses = responseAddrs
+		return rule.MatchAddressLimit(&checkMetadata)
+	}
+}
+
 func (r *Router) ClearCache() {
 	r.client.ClearCache()
 	if r.platformInterface != nil {

dns/transport/dhcp/dhcp.go

@@ -2,17 +2,18 @@ package dhcp
 
 import (
 	"context"
+	"errors"
+	"io"
 	"net"
 	"runtime"
 	"strings"
 	"sync"
+	"syscall"
 	"time"
 
 	"github.com/sagernet/sing-box/adapter"
-	"github.com/sagernet/sing-box/common/dialer"
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/dns"
-	"github.com/sagernet/sing-box/dns/transport"
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
 	"github.com/sagernet/sing-tun"
@@ -29,6 +30,7 @@ import (
 
 	"github.com/insomniacslk/dhcp/dhcpv4"
 	mDNS "github.com/miekg/dns"
+	"golang.org/x/exp/slices"
 )
 
 func RegisterTransport(registry *dns.TransportRegistry) {
@@ -45,9 +47,12 @@ type Transport struct {
 	networkManager    adapter.NetworkManager
 	interfaceName     string
 	interfaceCallback *list.Element[tun.DefaultInterfaceUpdateCallback]
-	transports        []adapter.DNSTransport
-	updateAccess      sync.Mutex
+	transportLock     sync.RWMutex
 	updatedAt         time.Time
+	servers           []M.Socksaddr
+	search            []string
+	ndots             int
+	attempts          int
 }
 
 func NewTransport(ctx context.Context, logger log.ContextLogger, tag string, options option.DHCPDNSServerOptions) (adapter.DNSTransport, error) {
@@ -62,27 +67,40 @@ func NewTransport(ctx context.Context, logger log.ContextLogger, tag string, opt
 		logger:           logger,
 		networkManager:   service.FromContext[adapter.NetworkManager](ctx),
 		interfaceName:    options.Interface,
+		ndots:            1,
+		attempts:         2,
 	}, nil
 }
 
+func NewRawTransport(transportAdapter dns.TransportAdapter, ctx context.Context, dialer N.Dialer, logger log.ContextLogger) *Transport {
+	return &Transport{
+		TransportAdapter: transportAdapter,
+		ctx:              ctx,
+		dialer:           dialer,
+		logger:           logger,
+		networkManager:   service.FromContext[adapter.NetworkManager](ctx),
+		ndots:            1,
+		attempts:         2,
+	}
+}
+
 func (t *Transport) Start(stage adapter.StartStage) error {
 	if stage != adapter.StartStateStart {
 		return nil
 	}
-	err := t.fetchServers()
-	if err != nil {
-		return err
-	}
 	if t.interfaceName == "" {
 		t.interfaceCallback = t.networkManager.InterfaceMonitor().RegisterCallback(t.interfaceUpdated)
 	}
+	go func() {
+		_, err := t.Fetch()
+		if err != nil {
+			t.logger.Error(E.Cause(err, "fetch DNS servers"))
+		}
+	}()
 	return nil
 }
 
 func (t *Transport) Close() error {
-	for _, transport := range t.transports {
-		transport.Close()
-	}
 	if t.interfaceCallback != nil {
 		t.networkManager.InterfaceMonitor().UnregisterCallback(t.interfaceCallback)
 	}
@@ -90,23 +108,44 @@ func (t *Transport) Close() error {
 }
 
 func (t *Transport) Exchange(ctx context.Context, message *mDNS.Msg) (*mDNS.Msg, error) {
-	err := t.fetchServers()
+	servers, err := t.Fetch()
 	if err != nil {
 		return nil, err
 	}
-
-	if len(t.transports) == 0 {
+	if len(servers) == 0 {
 		return nil, E.New("dhcp: empty DNS servers from response")
 	}
+	return t.Exchange0(ctx, message, servers)
+}
 
-	var response *mDNS.Msg
-	for _, transport := range t.transports {
-		response, err = transport.Exchange(ctx, message)
-		if err == nil {
-			return response, nil
-		}
+func (t *Transport) Exchange0(ctx context.Context, message *mDNS.Msg, servers []M.Socksaddr) (*mDNS.Msg, error) {
+	question := message.Question[0]
+	domain := dns.FqdnToDomain(question.Name)
+	if len(servers) == 1 || !(message.Question[0].Qtype == mDNS.TypeA || message.Question[0].Qtype == mDNS.TypeAAAA) {
+		return t.exchangeSingleRequest(ctx, servers, message, domain)
+	} else {
+		return t.exchangeParallel(ctx, servers, message, domain)
 	}
-	return nil, err
+}
+
+func (t *Transport) Fetch() ([]M.Socksaddr, error) {
+	t.transportLock.RLock()
+	updatedAt := t.updatedAt
+	servers := t.servers
+	t.transportLock.RUnlock()
+	if time.Since(updatedAt) < C.DHCPTTL {
+		return servers, nil
+	}
+	t.transportLock.Lock()
+	defer t.transportLock.Unlock()
+	if time.Since(t.updatedAt) < C.DHCPTTL {
+		return t.servers, nil
+	}
+	err := t.updateServers()
+	if err != nil {
+		return nil, err
+	}
+	return t.servers, nil
 }
 
 func (t *Transport) fetchInterface() (*control.Interface, error) {
@@ -124,18 +163,6 @@ func (t *Transport) fetchInterface() (*control.Interface, error) {
 	}
 }
 
-func (t *Transport) fetchServers() error {
-	if time.Since(t.updatedAt) < C.DHCPTTL {
-		return nil
-	}
-	t.updateAccess.Lock()
-	defer t.updateAccess.Unlock()
-	if time.Since(t.updatedAt) < C.DHCPTTL {
-		return nil
-	}
-	return t.updateServers()
-}
-
 func (t *Transport) updateServers() error {
 	iface, err := t.fetchInterface()
 	if err != nil {
@@ -148,7 +175,7 @@ func (t *Transport) updateServers() error {
 	cancel()
 	if err != nil {
 		return err
-	} else if len(t.transports) == 0 {
+	} else if len(t.servers) == 0 {
 		return E.New("dhcp: empty DNS servers response")
 	} else {
 		t.updatedAt = time.Now()
@@ -171,13 +198,27 @@ func (t *Transport) fetchServers0(ctx context.Context, iface *control.Interface)
 	if runtime.GOOS == "linux" || runtime.GOOS == "android" {
 		listenAddr = "255.255.255.255:68"
 	}
-	packetConn, err := listener.ListenPacket(t.ctx, "udp4", listenAddr)
+	var (
+		packetConn net.PacketConn
+		err        error
+	)
+	for i := 0; i < 5; i++ {
+		packetConn, err = listener.ListenPacket(t.ctx, "udp4", listenAddr)
+		if err == nil || !errors.Is(err, syscall.EADDRINUSE) {
+			break
+		}
+		time.Sleep(time.Second)
+	}
 	if err != nil {
 		return err
 	}
 	defer packetConn.Close()
 
-	discovery, err := dhcpv4.NewDiscovery(iface.HardwareAddr, dhcpv4.WithBroadcast(true), dhcpv4.WithRequestedOptions(dhcpv4.OptionDomainNameServer))
+	discovery, err := dhcpv4.NewDiscovery(iface.HardwareAddr, dhcpv4.WithBroadcast(true), dhcpv4.WithRequestedOptions(
+		dhcpv4.OptionDomainName,
+		dhcpv4.OptionDomainNameServer,
+		dhcpv4.OptionDNSDomainSearchList,
+	))
 	if err != nil {
 		return err
 	}
@@ -202,8 +243,12 @@ func (t *Transport) fetchServersResponse(iface *control.Interface, packetConn ne
 	defer buffer.Release()
 
 	for {
+		buffer.Reset()
 		_, _, err := buffer.ReadPacketFrom(packetConn)
 		if err != nil {
+			if errors.Is(err, io.ErrShortBuffer) {
+				continue
+			}
 			return err
 		}
 
@@ -223,31 +268,23 @@ func (t *Transport) fetchServersResponse(iface *control.Interface, packetConn ne
 			continue
 		}
 
-		dns := dhcpPacket.DNS()
-		if len(dns) == 0 {
-			return nil
-		}
-		return t.recreateServers(iface, common.Map(dns, func(it net.IP) M.Socksaddr {
-			return M.SocksaddrFrom(M.AddrFromIP(it), 53)
-		}))
+		return t.recreateServers(iface, dhcpPacket)
 	}
 }
 
-func (t *Transport) recreateServers(iface *control.Interface, serverAddrs []M.Socksaddr) error {
-	if len(serverAddrs) > 0 {
-		t.logger.Info("dhcp: updated DNS servers from ", iface.Name, ": [", strings.Join(common.Map(serverAddrs, M.Socksaddr.String), ","), "]")
+func (t *Transport) recreateServers(iface *control.Interface, dhcpPacket *dhcpv4.DHCPv4) error {
+	searchList := dhcpPacket.DomainSearch()
+	if searchList != nil && len(searchList.Labels) > 0 {
+		t.search = searchList.Labels
+	} else if dhcpPacket.DomainName() != "" {
+		t.search = []string{dhcpPacket.DomainName()}
 	}
-	serverDialer := common.Must1(dialer.NewDefault(t.ctx, option.DialerOptions{
-		BindInterface:      iface.Name,
-		UDPFragmentDefault: true,
-	}))
-	var transports []adapter.DNSTransport
-	for _, serverAddr := range serverAddrs {
-		transports = append(transports, transport.NewUDPRaw(t.logger, t.TransportAdapter, serverDialer, serverAddr))
+	serverAddrs := common.Map(dhcpPacket.DNS(), func(it net.IP) M.Socksaddr {
+		return M.SocksaddrFrom(M.AddrFromIP(it), 53)
+	})
+	if len(serverAddrs) > 0 && !slices.Equal(t.servers, serverAddrs) {
+		t.logger.Info("dhcp: updated DNS servers from ", iface.Name, ": [", strings.Join(common.Map(serverAddrs, M.Socksaddr.String), ","), "], search: [", strings.Join(t.search, ","), "]")
 	}
-	for _, transport := range t.transports {
-		transport.Close()
-	}
-	t.transports = transports
+	t.servers = serverAddrs
 	return nil
 }

dns/transport/dhcp/dhcp_shared.go

@@ -0,0 +1,213 @@
+package dhcp
+
+import (
+	"context"
+	"errors"
+	"math/rand"
+	"strings"
+	"syscall"
+
+	"github.com/sagernet/sing-box/dns"
+	"github.com/sagernet/sing-box/dns/transport"
+	"github.com/sagernet/sing/common/buf"
+	E "github.com/sagernet/sing/common/exceptions"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+
+	mDNS "github.com/miekg/dns"
+)
+
+func (t *Transport) exchangeSingleRequest(ctx context.Context, servers []M.Socksaddr, message *mDNS.Msg, domain string) (*mDNS.Msg, error) {
+	var lastErr error
+	for _, fqdn := range t.nameList(domain) {
+		response, err := t.tryOneName(ctx, servers, fqdn, message)
+		if err != nil {
+			lastErr = err
+			continue
+		}
+		return response, nil
+	}
+	return nil, lastErr
+}
+
+func (t *Transport) exchangeParallel(ctx context.Context, servers []M.Socksaddr, message *mDNS.Msg, domain string) (*mDNS.Msg, error) {
+	returned := make(chan struct{})
+	defer close(returned)
+	type queryResult struct {
+		response *mDNS.Msg
+		err      error
+	}
+	results := make(chan queryResult)
+	startRacer := func(ctx context.Context, fqdn string) {
+		response, err := t.tryOneName(ctx, servers, fqdn, message)
+		if err == nil {
+			if response.Rcode != mDNS.RcodeSuccess {
+				err = dns.RcodeError(response.Rcode)
+			} else if len(dns.MessageToAddresses(response)) == 0 {
+				err = dns.RcodeSuccess
+			}
+		}
+		select {
+		case results <- queryResult{response, err}:
+		case <-returned:
+		}
+	}
+	queryCtx, queryCancel := context.WithCancel(ctx)
+	defer queryCancel()
+	var nameCount int
+	for _, fqdn := range t.nameList(domain) {
+		nameCount++
+		go startRacer(queryCtx, fqdn)
+	}
+	var errors []error
+	for {
+		select {
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		case result := <-results:
+			if result.err == nil {
+				return result.response, nil
+			}
+			errors = append(errors, result.err)
+			if len(errors) == nameCount {
+				return nil, E.Errors(errors...)
+			}
+		}
+	}
+}
+
+func (t *Transport) tryOneName(ctx context.Context, servers []M.Socksaddr, fqdn string, message *mDNS.Msg) (*mDNS.Msg, error) {
+	sLen := len(servers)
+	var lastErr error
+	for i := 0; i < t.attempts; i++ {
+		for j := 0; j < sLen; j++ {
+			server := servers[j]
+			question := message.Question[0]
+			question.Name = fqdn
+			response, err := t.exchangeOne(ctx, server, question)
+			if err != nil {
+				lastErr = err
+				continue
+			}
+			return response, nil
+		}
+	}
+	return nil, E.Cause(lastErr, fqdn)
+}
+
+func (t *Transport) exchangeOne(ctx context.Context, server M.Socksaddr, question mDNS.Question) (*mDNS.Msg, error) {
+	if server.Port == 0 {
+		server.Port = 53
+	}
+	request := &mDNS.Msg{
+		MsgHdr: mDNS.MsgHdr{
+			Id:                uint16(rand.Uint32()),
+			RecursionDesired:  true,
+			AuthenticatedData: true,
+		},
+		Question: []mDNS.Question{question},
+		Compress: true,
+	}
+	request.SetEdns0(buf.UDPBufferSize, false)
+	return t.exchangeUDP(ctx, server, request)
+}
+
+func (t *Transport) exchangeUDP(ctx context.Context, server M.Socksaddr, request *mDNS.Msg) (*mDNS.Msg, error) {
+	conn, err := t.dialer.DialContext(ctx, N.NetworkUDP, server)
+	if err != nil {
+		return nil, err
+	}
+	defer conn.Close()
+	if deadline, loaded := ctx.Deadline(); loaded && !deadline.IsZero() {
+		conn.SetDeadline(deadline)
+	}
+	buffer := buf.Get(buf.UDPBufferSize)
+	defer buf.Put(buffer)
+	rawMessage, err := request.PackBuffer(buffer)
+	if err != nil {
+		return nil, E.Cause(err, "pack request")
+	}
+	_, err = conn.Write(rawMessage)
+	if err != nil {
+		if errors.Is(err, syscall.EMSGSIZE) {
+			return t.exchangeTCP(ctx, server, request)
+		}
+		return nil, E.Cause(err, "write request")
+	}
+	n, err := conn.Read(buffer)
+	if err != nil {
+		if errors.Is(err, syscall.EMSGSIZE) {
+			return t.exchangeTCP(ctx, server, request)
+		}
+		return nil, E.Cause(err, "read response")
+	}
+	var response mDNS.Msg
+	err = response.Unpack(buffer[:n])
+	if err != nil {
+		return nil, E.Cause(err, "unpack response")
+	}
+	if response.Truncated {
+		return t.exchangeTCP(ctx, server, request)
+	}
+	return &response, nil
+}
+
+func (t *Transport) exchangeTCP(ctx context.Context, server M.Socksaddr, request *mDNS.Msg) (*mDNS.Msg, error) {
+	conn, err := t.dialer.DialContext(ctx, N.NetworkTCP, server)
+	if err != nil {
+		return nil, err
+	}
+	defer conn.Close()
+	if deadline, loaded := ctx.Deadline(); loaded && !deadline.IsZero() {
+		conn.SetDeadline(deadline)
+	}
+	err = transport.WriteMessage(conn, 0, request)
+	if err != nil {
+		return nil, err
+	}
+	return transport.ReadMessage(conn)
+}
+
+func (t *Transport) nameList(name string) []string {
+	l := len(name)
+	rooted := l > 0 && name[l-1] == '.'
+	if l > 254 || l == 254 && !rooted {
+		return nil
+	}
+
+	if rooted {
+		if avoidDNS(name) {
+			return nil
+		}
+		return []string{name}
+	}
+
+	hasNdots := strings.Count(name, ".") >= t.ndots
+	name += "."
+	// l++
+
+	names := make([]string, 0, 1+len(t.search))
+	if hasNdots && !avoidDNS(name) {
+		names = append(names, name)
+	}
+	for _, suffix := range t.search {
+		fqdn := name + suffix
+		if !avoidDNS(fqdn) && len(fqdn) <= 254 {
+			names = append(names, fqdn)
+		}
+	}
+	if !hasNdots && !avoidDNS(name) {
+		names = append(names, name)
+	}
+	return names
+}
+
+func avoidDNS(name string) bool {
+	if name == "" {
+		return true
+	}
+	if name[len(name)-1] == '.' {
+		name = name[:len(name)-1]
+	}
+	return strings.HasSuffix(name, ".onion")
+}

dns/transport/fakeip/store.go

@@ -17,18 +17,43 @@ type Store struct {
 	logger       logger.Logger
 	inet4Range   netip.Prefix
 	inet6Range   netip.Prefix
+	inet4Last    netip.Addr
+	inet6Last    netip.Addr
 	storage      adapter.FakeIPStorage
 	inet4Current netip.Addr
 	inet6Current netip.Addr
 }
 
 func NewStore(ctx context.Context, logger logger.Logger, inet4Range netip.Prefix, inet6Range netip.Prefix) *Store {
-	return &Store{
+	store := &Store{
 		ctx:        ctx,
 		logger:     logger,
 		inet4Range: inet4Range,
 		inet6Range: inet6Range,
 	}
+	if inet4Range.IsValid() {
+		store.inet4Last = broadcastAddress(inet4Range)
+	}
+	if inet6Range.IsValid() {
+		store.inet6Last = broadcastAddress(inet6Range)
+	}
+	return store
+}
+
+func broadcastAddress(prefix netip.Prefix) netip.Addr {
+	addr := prefix.Addr()
+	raw := addr.As16()
+	bits := prefix.Bits()
+	if addr.Is4() {
+		bits += 96
+	}
+	for i := bits; i < 128; i++ {
+		raw[i/8] |= 1 << (7 - i%8)
+	}
+	if addr.Is4() {
+		return netip.AddrFrom4([4]byte(raw[12:]))
+	}
+	return netip.AddrFrom16(raw)
 }
 
 func (s *Store) Start() error {
@@ -46,10 +71,10 @@ func (s *Store) Start() error {
 		s.inet6Current = metadata.Inet6Current
 	} else {
 		if s.inet4Range.IsValid() {
-			s.inet4Current = s.inet4Range.Addr().Next().Next()
+			s.inet4Current = s.inet4Range.Addr().Next()
 		}
 		if s.inet6Range.IsValid() {
-			s.inet6Current = s.inet6Range.Addr().Next().Next()
+			s.inet6Current = s.inet6Range.Addr().Next()
 		}
 		_ = storage.FakeIPReset()
 	}
@@ -83,7 +108,7 @@ func (s *Store) Create(domain string, isIPv6 bool) (netip.Addr, error) {
 			return netip.Addr{}, E.New("missing IPv4 fakeip address range")
 		}
 		nextAddress := s.inet4Current.Next()
-		if !s.inet4Range.Contains(nextAddress) {
+		if nextAddress == s.inet4Last || !s.inet4Range.Contains(nextAddress) {
 			nextAddress = s.inet4Range.Addr().Next().Next()
 		}
 		s.inet4Current = nextAddress
@@ -93,7 +118,7 @@ func (s *Store) Create(domain string, isIPv6 bool) (netip.Addr, error) {
 			return netip.Addr{}, E.New("missing IPv6 fakeip address range")
 		}
 		nextAddress := s.inet6Current.Next()
-		if !s.inet6Range.Contains(nextAddress) {
+		if nextAddress == s.inet6Last || !s.inet6Range.Contains(nextAddress) {
 			nextAddress = s.inet6Range.Addr().Next().Next()
 		}
 		s.inet6Current = nextAddress

dns/transport/https.go

@@ -3,11 +3,14 @@ package transport
 import (
 	"bytes"
 	"context"
+	"errors"
 	"io"
 	"net"
 	"net/http"
 	"net/url"
 	"strconv"
+	"sync"
+	"time"
 
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/common/dialer"
@@ -22,7 +25,6 @@ import (
 	"github.com/sagernet/sing/common/logger"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
-	aTLS "github.com/sagernet/sing/common/tls"
 	sHTTP "github.com/sagernet/sing/protocol/http"
 
 	mDNS "github.com/miekg/dns"
@@ -39,11 +41,13 @@ func RegisterHTTPS(registry *dns.TransportRegistry) {
 
 type HTTPSTransport struct {
 	dns.TransportAdapter
-	logger      logger.ContextLogger
-	dialer      N.Dialer
-	destination *url.URL
-	headers     http.Header
-	transport   *http.Transport
+	logger           logger.ContextLogger
+	dialer           N.Dialer
+	destination      *url.URL
+	headers          http.Header
+	transportAccess  sync.Mutex
+	transport        *HTTPSTransportWrapper
+	transportResetAt time.Time
 }
 
 func NewHTTPS(ctx context.Context, logger log.ContextLogger, tag string, options option.RemoteHTTPSDNSServerOptions) (adapter.DNSTransport, error) {
@@ -57,11 +61,8 @@ func NewHTTPS(ctx context.Context, logger log.ContextLogger, tag string, options
 	if err != nil {
 		return nil, err
 	}
-	if common.Error(tlsConfig.Config()) == nil && !common.Contains(tlsConfig.NextProtos(), http2.NextProtoTLS) {
-		tlsConfig.SetNextProtos(append(tlsConfig.NextProtos(), http2.NextProtoTLS))
-	}
-	if !common.Contains(tlsConfig.NextProtos(), "http/1.1") {
-		tlsConfig.SetNextProtos(append(tlsConfig.NextProtos(), "http/1.1"))
+	if len(tlsConfig.NextProtos()) == 0 {
+		tlsConfig.SetNextProtos([]string{http2.NextProtoTLS, "http/1.1"})
 	}
 	headers := options.Headers.Build()
 	host := headers.Get("Host")
@@ -119,37 +120,13 @@ func NewHTTPSRaw(
 	serverAddr M.Socksaddr,
 	tlsConfig tls.Config,
 ) *HTTPSTransport {
-	var transport *http.Transport
-	if tlsConfig != nil {
-		transport = &http.Transport{
-			ForceAttemptHTTP2: true,
-			DialTLSContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
-				tcpConn, hErr := dialer.DialContext(ctx, network, serverAddr)
-				if hErr != nil {
-					return nil, hErr
-				}
-				tlsConn, hErr := aTLS.ClientHandshake(ctx, tcpConn, tlsConfig)
-				if hErr != nil {
-					tcpConn.Close()
-					return nil, hErr
-				}
-				return tlsConn, nil
-			},
-		}
-	} else {
-		transport = &http.Transport{
-			DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
-				return dialer.DialContext(ctx, network, serverAddr)
-			},
-		}
-	}
 	return &HTTPSTransport{
 		TransportAdapter: adapter,
 		logger:           logger,
 		dialer:           dialer,
 		destination:      destination,
 		headers:          headers,
-		transport:        transport,
+		transport:        NewHTTPSTransportWrapper(tls.NewDialer(dialer, tlsConfig), serverAddr),
 	}
 }
 
@@ -161,12 +138,33 @@ func (t *HTTPSTransport) Start(stage adapter.StartStage) error {
 }
 
 func (t *HTTPSTransport) Close() error {
+	t.transportAccess.Lock()
+	defer t.transportAccess.Unlock()
 	t.transport.CloseIdleConnections()
 	t.transport = t.transport.Clone()
 	return nil
 }
 
 func (t *HTTPSTransport) Exchange(ctx context.Context, message *mDNS.Msg) (*mDNS.Msg, error) {
+	startAt := time.Now()
+	response, err := t.exchange(ctx, message)
+	if err != nil {
+		if errors.Is(err, context.DeadlineExceeded) {
+			t.transportAccess.Lock()
+			defer t.transportAccess.Unlock()
+			if t.transportResetAt.After(startAt) {
+				return nil, err
+			}
+			t.transport.CloseIdleConnections()
+			t.transport = t.transport.Clone()
+			t.transportResetAt = time.Now()
+		}
+		return nil, err
+	}
+	return response, nil
+}
+
+func (t *HTTPSTransport) exchange(ctx context.Context, message *mDNS.Msg) (*mDNS.Msg, error) {
 	exMessage := *message
 	exMessage.Id = 0
 	exMessage.Compress = true

dns/transport/https_transport.go

@@ -0,0 +1,80 @@
+package transport
+
+import (
+	"context"
+	"errors"
+	"net"
+	"net/http"
+	"sync/atomic"
+
+	"github.com/sagernet/sing-box/common/tls"
+	E "github.com/sagernet/sing/common/exceptions"
+	M "github.com/sagernet/sing/common/metadata"
+
+	"golang.org/x/net/http2"
+)
+
+var errFallback = E.New("fallback to HTTP/1.1")
+
+type HTTPSTransportWrapper struct {
+	http2Transport *http2.Transport
+	httpTransport  *http.Transport
+	fallback       *atomic.Bool
+}
+
+func NewHTTPSTransportWrapper(dialer tls.Dialer, serverAddr M.Socksaddr) *HTTPSTransportWrapper {
+	var fallback atomic.Bool
+	return &HTTPSTransportWrapper{
+		http2Transport: &http2.Transport{
+			DialTLSContext: func(ctx context.Context, _, _ string, _ *tls.STDConfig) (net.Conn, error) {
+				tlsConn, err := dialer.DialTLSContext(ctx, serverAddr)
+				if err != nil {
+					return nil, err
+				}
+				state := tlsConn.ConnectionState()
+				if state.NegotiatedProtocol == http2.NextProtoTLS {
+					return tlsConn, nil
+				}
+				tlsConn.Close()
+				fallback.Store(true)
+				return nil, errFallback
+			},
+		},
+		httpTransport: &http.Transport{
+			DialTLSContext: func(ctx context.Context, _, _ string) (net.Conn, error) {
+				return dialer.DialTLSContext(ctx, serverAddr)
+			},
+		},
+		fallback: &fallback,
+	}
+}
+
+func (h *HTTPSTransportWrapper) RoundTrip(request *http.Request) (*http.Response, error) {
+	if h.fallback.Load() {
+		return h.httpTransport.RoundTrip(request)
+	} else {
+		response, err := h.http2Transport.RoundTrip(request)
+		if err != nil {
+			if errors.Is(err, errFallback) {
+				return h.httpTransport.RoundTrip(request)
+			}
+			return nil, err
+		}
+		return response, nil
+	}
+}
+
+func (h *HTTPSTransportWrapper) CloseIdleConnections() {
+	h.http2Transport.CloseIdleConnections()
+	h.httpTransport.CloseIdleConnections()
+}
+
+func (h *HTTPSTransportWrapper) Clone() *HTTPSTransportWrapper {
+	return &HTTPSTransportWrapper{
+		httpTransport: h.httpTransport,
+		http2Transport: &http2.Transport{
+			DialTLSContext: h.http2Transport.DialTLSContext,
+		},
+		fallback: h.fallback,
+	}
+}

dns/transport/local/local.go

@@ -2,13 +2,15 @@ package local
 
 import (
 	"context"
+	"errors"
 	"math/rand"
-	"net/netip"
+	"syscall"
 	"time"
 
 	"github.com/sagernet/sing-box/adapter"
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/dns"
+	"github.com/sagernet/sing-box/dns/transport"
 	"github.com/sagernet/sing-box/dns/transport/hosts"
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
@@ -52,18 +54,17 @@ func (t *Transport) Close() error {
 
 func (t *Transport) Exchange(ctx context.Context, message *mDNS.Msg) (*mDNS.Msg, error) {
 	question := message.Question[0]
-	domain := dns.FqdnToDomain(question.Name)
 	if question.Qtype == mDNS.TypeA || question.Qtype == mDNS.TypeAAAA {
-		addresses := t.hosts.Lookup(domain)
+		addresses := t.hosts.Lookup(dns.FqdnToDomain(question.Name))
 		if len(addresses) > 0 {
 			return dns.FixedResponse(message.Id, question, addresses, C.DefaultDNSTTL), nil
 		}
 	}
 	systemConfig := getSystemDNSConfig(t.ctx)
 	if systemConfig.singleRequest || !(message.Question[0].Qtype == mDNS.TypeA || message.Question[0].Qtype == mDNS.TypeAAAA) {
-		return t.exchangeSingleRequest(ctx, systemConfig, message, domain)
+		return t.exchangeSingleRequest(ctx, systemConfig, message, question.Name)
 	} else {
-		return t.exchangeParallel(ctx, systemConfig, message, domain)
+		return t.exchangeParallel(ctx, systemConfig, message, question.Name)
 	}
 }
 
@@ -91,10 +92,10 @@ func (t *Transport) exchangeParallel(ctx context.Context, systemConfig *dnsConfi
 	startRacer := func(ctx context.Context, fqdn string) {
 		response, err := t.tryOneName(ctx, systemConfig, fqdn, message)
 		if err == nil {
-			var addresses []netip.Addr
-			addresses, err = dns.MessageToAddresses(response)
-			if err == nil && len(addresses) == 0 {
-				err = E.New(fqdn, ": empty result")
+			if response.Rcode != mDNS.RcodeSuccess {
+				err = dns.RcodeError(response.Rcode)
+			} else if len(dns.MessageToAddresses(response)) == 0 {
+				err = dns.RcodeSuccess
 			}
 		}
 		select {
@@ -150,12 +151,6 @@ func (t *Transport) exchangeOne(ctx context.Context, server M.Socksaddr, questio
 	if server.Port == 0 {
 		server.Port = 53
 	}
-	var networks []string
-	if useTCP {
-		networks = []string{N.NetworkTCP}
-	} else {
-		networks = []string{N.NetworkUDP, N.NetworkTCP}
-	}
 	request := &mDNS.Msg{
 		MsgHdr: mDNS.MsgHdr{
 			Id:                uint16(rand.Uint32()),
@@ -165,41 +160,74 @@ func (t *Transport) exchangeOne(ctx context.Context, server M.Socksaddr, questio
 		Question: []mDNS.Question{question},
 		Compress: true,
 	}
-	request.SetEdns0(maxDNSPacketSize, false)
+	request.SetEdns0(buf.UDPBufferSize, false)
+	if !useTCP {
+		return t.exchangeUDP(ctx, server, request, timeout)
+	} else {
+		return t.exchangeTCP(ctx, server, request, timeout)
+	}
+}
+
+func (t *Transport) exchangeUDP(ctx context.Context, server M.Socksaddr, request *mDNS.Msg, timeout time.Duration) (*mDNS.Msg, error) {
+	conn, err := t.dialer.DialContext(ctx, N.NetworkUDP, server)
+	if err != nil {
+		return nil, err
+	}
+	defer conn.Close()
+	if deadline, loaded := ctx.Deadline(); loaded && !deadline.IsZero() {
+		newDeadline := time.Now().Add(timeout)
+		if deadline.After(newDeadline) {
+			deadline = newDeadline
+		}
+		conn.SetDeadline(deadline)
+	}
 	buffer := buf.Get(buf.UDPBufferSize)
 	defer buf.Put(buffer)
-	for _, network := range networks {
-		ctx, cancel := context.WithDeadline(ctx, time.Now().Add(timeout))
-		defer cancel()
-		conn, err := t.dialer.DialContext(ctx, network, server)
-		if err != nil {
-			return nil, err
-		}
-		defer conn.Close()
-		if deadline, loaded := ctx.Deadline(); loaded && !deadline.IsZero() {
-			conn.SetDeadline(deadline)
-		}
-		rawMessage, err := request.PackBuffer(buffer)
-		if err != nil {
-			return nil, E.Cause(err, "pack request")
-		}
-		_, err = conn.Write(rawMessage)
-		if err != nil {
-			return nil, E.Cause(err, "write request")
-		}
-		n, err := conn.Read(buffer)
-		if err != nil {
-			return nil, E.Cause(err, "read response")
-		}
-		var response mDNS.Msg
-		err = response.Unpack(buffer[:n])
-		if err != nil {
-			return nil, E.Cause(err, "unpack response")
-		}
-		if response.Truncated && network == N.NetworkUDP {
-			continue
-		}
-		return &response, nil
+	rawMessage, err := request.PackBuffer(buffer)
+	if err != nil {
+		return nil, E.Cause(err, "pack request")
 	}
-	panic("unexpected")
+	_, err = conn.Write(rawMessage)
+	if err != nil {
+		if errors.Is(err, syscall.EMSGSIZE) {
+			return t.exchangeTCP(ctx, server, request, timeout)
+		}
+		return nil, E.Cause(err, "write request")
+	}
+	n, err := conn.Read(buffer)
+	if err != nil {
+		if errors.Is(err, syscall.EMSGSIZE) {
+			return t.exchangeTCP(ctx, server, request, timeout)
+		}
+		return nil, E.Cause(err, "read response")
+	}
+	var response mDNS.Msg
+	err = response.Unpack(buffer[:n])
+	if err != nil {
+		return nil, E.Cause(err, "unpack response")
+	}
+	if response.Truncated {
+		return t.exchangeTCP(ctx, server, request, timeout)
+	}
+	return &response, nil
+}
+
+func (t *Transport) exchangeTCP(ctx context.Context, server M.Socksaddr, request *mDNS.Msg, timeout time.Duration) (*mDNS.Msg, error) {
+	conn, err := t.dialer.DialContext(ctx, N.NetworkTCP, server)
+	if err != nil {
+		return nil, err
+	}
+	defer conn.Close()
+	if deadline, loaded := ctx.Deadline(); loaded && !deadline.IsZero() {
+		newDeadline := time.Now().Add(timeout)
+		if deadline.After(newDeadline) {
+			deadline = newDeadline
+		}
+		conn.SetDeadline(deadline)
+	}
+	err = transport.WriteMessage(conn, 0, request)
+	if err != nil {
+		return nil, err
+	}
+	return transport.ReadMessage(conn)
 }

dns/transport/local/local_fallback.go

@@ -67,7 +67,6 @@ func (f *FallbackTransport) Exchange(ctx context.Context, message *mDNS.Msg) (*m
 		return f.DNSTransport.Exchange(ctx, message)
 	}
 	question := message.Question[0]
-	domain := dns.FqdnToDomain(question.Name)
 	if question.Qtype == mDNS.TypeA || question.Qtype == mDNS.TypeAAAA {
 		var network string
 		if question.Qtype == mDNS.TypeA {
@@ -75,7 +74,7 @@ func (f *FallbackTransport) Exchange(ctx context.Context, message *mDNS.Msg) (*m
 		} else {
 			network = "ip6"
 		}
-		addresses, err := f.resolver.LookupNetIP(ctx, network, domain)
+		addresses, err := f.resolver.LookupNetIP(ctx, network, question.Name)
 		if err != nil {
 			var dnsError *net.DNSError
 			if errors.As(err, &dnsError) && dnsError.IsNotFound {
@@ -85,7 +84,7 @@ func (f *FallbackTransport) Exchange(ctx context.Context, message *mDNS.Msg) (*m
 		}
 		return dns.FixedResponse(message.Id, question, addresses, C.DefaultDNSTTL), nil
 	} else if question.Qtype == mDNS.TypeNS {
-		records, err := f.resolver.LookupNS(ctx, domain)
+		records, err := f.resolver.LookupNS(ctx, question.Name)
 		if err != nil {
 			var dnsError *net.DNSError
 			if errors.As(err, &dnsError) && dnsError.IsNotFound {
@@ -114,7 +113,7 @@ func (f *FallbackTransport) Exchange(ctx context.Context, message *mDNS.Msg) (*m
 		}
 		return response, nil
 	} else if question.Qtype == mDNS.TypeCNAME {
-		cname, err := f.resolver.LookupCNAME(ctx, domain)
+		cname, err := f.resolver.LookupCNAME(ctx, question.Name)
 		if err != nil {
 			var dnsError *net.DNSError
 			if errors.As(err, &dnsError) && dnsError.IsNotFound {
@@ -142,7 +141,7 @@ func (f *FallbackTransport) Exchange(ctx context.Context, message *mDNS.Msg) (*m
 			},
 		}, nil
 	} else if question.Qtype == mDNS.TypeTXT {
-		records, err := f.resolver.LookupTXT(ctx, domain)
+		records, err := f.resolver.LookupTXT(ctx, question.Name)
 		if err != nil {
 			var dnsError *net.DNSError
 			if errors.As(err, &dnsError) && dnsError.IsNotFound {
@@ -170,7 +169,7 @@ func (f *FallbackTransport) Exchange(ctx context.Context, message *mDNS.Msg) (*m
 			},
 		}, nil
 	} else if question.Qtype == mDNS.TypeMX {
-		records, err := f.resolver.LookupMX(ctx, domain)
+		records, err := f.resolver.LookupMX(ctx, question.Name)
 		if err != nil {
 			var dnsError *net.DNSError
 			if errors.As(err, &dnsError) && dnsError.IsNotFound {

dns/transport/local/resolv.go

@@ -10,11 +10,6 @@ import (
 	"time"
 )
 
-const (
-	// net.maxDNSPacketSize
-	maxDNSPacketSize = 1232
-)
-
 type resolverConfig struct {
 	initOnce    sync.Once
 	ch          chan struct{}
@@ -104,7 +99,7 @@ func (c *dnsConfig) serverOffset() uint32 {
 	return 0
 }
 
-func (conf *dnsConfig) nameList(name string) []string {
+func (c *dnsConfig) nameList(name string) []string {
 	l := len(name)
 	rooted := l > 0 && name[l-1] == '.'
 	if l > 254 || l == 254 && !rooted {
@@ -118,15 +113,15 @@ func (conf *dnsConfig) nameList(name string) []string {
 		return []string{name}
 	}
 
-	hasNdots := strings.Count(name, ".") >= conf.ndots
+	hasNdots := strings.Count(name, ".") >= c.ndots
 	name += "."
 	// l++
 
-	names := make([]string, 0, 1+len(conf.search))
+	names := make([]string, 0, 1+len(c.search))
 	if hasNdots && !avoidDNS(name) {
 		names = append(names, name)
 	}
-	for _, suffix := range conf.search {
+	for _, suffix := range c.search {
 		fqdn := name + suffix
 		if !avoidDNS(fqdn) && len(fqdn) <= 254 {
 			names = append(names, fqdn)

dns/transport/local/resolv_darwin_cgo.go

@@ -20,7 +20,8 @@ import (
 )
 
 func dnsReadConfig(_ context.Context, _ string) *dnsConfig {
-	if C.res_init() != 0 {
+	var state C.struct___res_state
+	if C.res_ninit(&state) != 0 {
 		return &dnsConfig{
 			servers:  defaultNS,
 			search:   dnsDefaultSearch(),
@@ -33,10 +34,10 @@ func dnsReadConfig(_ context.Context, _ string) *dnsConfig {
 	conf := &dnsConfig{
 		ndots:    1,
 		timeout:  5 * time.Second,
-		attempts: int(C._res.retry),
+		attempts: int(state.retry),
 	}
-	for i := 0; i < int(C._res.nscount); i++ {
-		ns := C._res.nsaddr_list[i]
+	for i := 0; i < int(state.nscount); i++ {
+		ns := state.nsaddr_list[i]
 		addr := C.inet_ntoa(ns.sin_addr)
 		if addr == nil {
 			continue
@@ -44,7 +45,7 @@ func dnsReadConfig(_ context.Context, _ string) *dnsConfig {
 		conf.servers = append(conf.servers, C.GoString(addr))
 	}
 	for i := 0; ; i++ {
-		search := C._res.dnsrch[i]
+		search := state.dnsrch[i]
 		if search == nil {
 			break
 		}

dns/transport/local/resolv_test.go

@@ -0,0 +1,13 @@
+package local
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestDNSReadConfig(t *testing.T) {
+	t.Parallel()
+	require.NoError(t, dnsReadConfig(context.Background(), "/etc/resolv.conf").err)
+}

dns/transport/local/resolv_windows.go

@@ -5,6 +5,7 @@ import (
 	"net"
 	"net/netip"
 	"os"
+	"strconv"
 	"syscall"
 	"time"
 	"unsafe"
@@ -63,6 +64,9 @@ func dnsReadConfig(ctx context.Context, _ string) *dnsConfig {
 					continue
 				}
 				dnsServerAddr = netip.AddrFrom16(sockaddr.Addr)
+				if sockaddr.ZoneId != 0 {
+					dnsServerAddr = dnsServerAddr.WithZone(strconv.FormatInt(int64(sockaddr.ZoneId), 10))
+				}
 			default:
 				// Unexpected type.
 				continue

dns/transport/udp.go

@@ -60,7 +60,7 @@ func NewUDPRaw(logger logger.ContextLogger, adapter dns.TransportAdapter, dialer
 		logger:           logger,
 		dialer:           dialer,
 		serverAddr:       serverAddr,
-		udpSize:          512,
+		udpSize:          2048,
 		tcpTransport: &TCPTransport{
 			dialer:     dialer,
 			serverAddr: serverAddr,
@@ -97,15 +97,19 @@ func (t *UDPTransport) Exchange(ctx context.Context, message *mDNS.Msg) (*mDNS.M
 }
 
 func (t *UDPTransport) exchange(ctx context.Context, message *mDNS.Msg) (*mDNS.Msg, error) {
-	conn, err := t.open(ctx)
-	if err != nil {
-		return nil, err
-	}
+	t.access.Lock()
 	if edns0Opt := message.IsEdns0(); edns0Opt != nil {
 		if udpSize := int(edns0Opt.UDPSize()); udpSize > t.udpSize {
 			t.udpSize = udpSize
+			close(t.done)
+			t.done = make(chan struct{})
 		}
 	}
+	t.access.Unlock()
+	conn, err := t.open(ctx)
+	if err != nil {
+		return nil, err
+	}
 	buffer := buf.NewSize(1 + message.Len())
 	defer buffer.Release()
 	exMessage := *message

docs/changelog.md

@@ -2,10 +2,354 @@
 icon: material/alert-decagram
 ---
 
-#### 1.12.0-beta.18
+#### 1.12.25
+
+* Backport fixes
+
+#### 1.12.25
+
+* Backport fixes
+
+#### 1.12.23
 
 * Fixes and improvements
 
+#### 1.12.22
+
+* Fixes and improvements
+
+#### 1.12.21
+
+* Fixes and improvements
+
+#### 1.12.20
+
+* Fixes and improvements
+
+#### 1.12.19
+
+* Fixes and improvements
+
+#### 1.12.18
+
+* Add fallback routing rule for `auto_redirect` **1**
+* Fixes and improvements
+
+**1**:
+
+Adds a fallback iproute2 rule checked after system default rules (32766: main, 32767: default),
+ensuring traffic is routed to the sing-box table when no route is found in system tables.
+
+The rule index can be customized via `auto_redirect_iproute2_fallback_rule_index` (default: 32768).
+
+#### 1.12.17
+
+* Update uTLS to v1.8.2 **1**
+* Fixes and improvements
+
+**1**:
+
+This update fixes missing padding extension for Chrome 120+ fingerprints.
+
+Also, documentation has been updated with a warning about uTLS fingerprinting vulnerabilities.
+uTLS is not recommended for censorship circumvention due to fundamental architectural limitations;
+use NaiveProxy instead for TLS fingerprint resistance.
+
+#### 1.12.16
+
+* Fixes and improvements
+
+#### 1.12.15
+
+* Fixes and improvements
+
+#### 1.12.14
+
+* Fixes and improvements
+
+#### 1.12.13
+
+* Fix naive inbound
+* Fixes and improvements
+
+__Unfortunately, for non-technical reasons, we are currently unable to notarize the standalone version of the macOS client:
+because system extensions require signatures to function, we have had to temporarily halt its release.__
+
+__We plan to fix the App Store release issue and launch a new standalone desktop client, but until then,
+only clients on TestFlight will be available (unless you have an Apple Developer Program and compile from source code).__
+
+#### 1.12.12
+
+* Fixes and improvements
+
+#### 1.12.11
+
+* Fixes and improvements
+
+#### 1.12.10
+
+* Update uTLS to v1.8.1 **1**
+* Fixes and improvements
+
+**1**:
+
+This update fixes an critical issue that could cause simulated Chrome fingerprints to be detected,
+see https://github.com/refraction-networking/utls/pull/375.
+
+#### 1.12.9
+
+* Fixes and improvements
+
+#### 1.12.8
+
+* Fixes and improvements
+
+#### 1.12.5
+
+* Fixes and improvements
+
+#### 1.12.4
+
+* Fixes and improvements
+
+#### 1.12.3
+
+* Fixes and improvements
+
+#### 1.12.2
+
+* Fixes and improvements
+
+#### 1.12.1
+
+* Fixes and improvements
+
+#### 1.12.0
+
+* Refactor DNS servers **1**
+* Add domain resolver options**2**
+* Add TLS fragment/record fragment support to route options and outbound TLS options **3**
+* Add certificate options **4**
+* Add Tailscale endpoint and DNS server **5**
+* Drop support for go1.22 **6**
+* Add AnyTLS protocol **7**
+* Migrate to stdlib ECH implementation **8**
+* Add NTP sniffer **9**
+* Add wildcard SNI support for ShadowTLS inbound **10**
+* Improve `auto_redirect` **11**
+* Add control options for listeners **12**
+* Add DERP service **13**
+* Add Resolved service and DNS server **14**
+* Add SSM API service **15**
+* Add loopback address support for tun **16**
+* Improve tun performance on Apple platforms **17**
+* Update quic-go to v0.52.0
+* Update gVisor to 20250319.0
+* Update the status of graphical clients in stores **18**
+
+**1**:
+
+DNS servers are refactored for better performance and scalability.
+
+See [DNS server](/configuration/dns/server/).
+
+For migration, see [Migrate to new DNS server formats](/migration/#migrate-to-new-dns-servers).
+
+Compatibility for old formats will be removed in sing-box 1.14.0.
+
+**2**:
+
+Legacy `outbound` DNS rules are deprecated
+and can be replaced by the new `domain_resolver` option.
+
+See [Dial Fields](/configuration/shared/dial/#domain_resolver) and
+[Route](/configuration/route/#default_domain_resolver).
+
+For migration,
+see [Migrate outbound DNS rule items to domain resolver](/migration/#migrate-outbound-dns-rule-items-to-domain-resolver).
+
+**3**:
+
+See [Route Action](/configuration/route/rule_action/#tls_fragment) and [TLS](/configuration/shared/tls/).
+
+**4**:
+
+New certificate options allow you to manage the default list of trusted X509 CA certificates.
+
+For the system certificate list, fixed Go not reading Android trusted certificates correctly.
+
+You can also use the Mozilla Included List instead, or add trusted certificates yourself.
+
+See [Certificate](/configuration/certificate/).
+
+**5**:
+
+See [Tailscale](/configuration/endpoint/tailscale/).
+
+**6**:
+
+Due to maintenance difficulties, sing-box 1.12.0 requires at least Go 1.23 to compile.
+
+For Windows 7 users, legacy binaries now continue to compile with Go 1.23 and patches
+from [MetaCubeX/go](https://github.com/MetaCubeX/go).
+
+**7**:
+
+The new AnyTLS protocol claims to mitigate TLS proxy traffic characteristics and comes with a new multiplexing scheme.
+
+See [AnyTLS Inbound](/configuration/inbound/anytls/) and [AnyTLS Outbound](/configuration/outbound/anytls/).
+
+**8**:
+
+See [TLS](/configuration/shared/tls).
+
+The build tag `with_ech` is no longer needed and has been removed.
+
+**9**:
+
+See [Protocol Sniff](/configuration/route/sniff/).
+
+**10**:
+
+See [ShadowTLS](/configuration/inbound/shadowtls/#wildcard_sni).
+
+**11**:
+
+Now `auto_redirect` fixes compatibility issues between tun and Docker bridge networks,
+see [Tun](/configuration/inbound/tun/#auto_redirect).
+
+**12**:
+
+You can now set `bind_interface`, `routing_mark` and `reuse_addr` in Listen Fields.
+
+See [Listen Fields](/configuration/shared/listen/).
+
+**13**:
+
+DERP service is a Tailscale DERP server, similar to [derper](https://pkg.go.dev/tailscale.com/cmd/derper).
+
+See [DERP Service](/configuration/service/derp/).
+
+**14**:
+
+Resolved service is a fake systemd-resolved DBUS service to receive DNS settings from other programs
+(e.g. NetworkManager) and provide DNS resolution.
+
+See [Resolved Service](/configuration/service/resolved/) and [Resolved DNS Server](/configuration/dns/server/resolved/).
+
+**15**:
+
+SSM API service is a RESTful API server for managing Shadowsocks servers.
+
+See [SSM API Service](/configuration/service/ssm-api/).
+
+**16**:
+
+TUN now implements SideStore's StosVPN.
+
+See [Tun](/configuration/inbound/tun/#loopback_address).
+
+**17**:
+
+We have significantly improved the performance of tun inbound on Apple platforms, especially in the gVisor stack.
+
+The following data was tested
+using [tun_bench](https://github.com/SagerNet/sing-box/blob/dev-next/cmd/internal/tun_bench/main.go) on M4 MacBook pro.
+
+| Version     | Stack  | MTU   | Upload | Download |
+|-------------|--------|-------|--------|----------|
+| 1.11.15     | gvisor | 1500  | 852M   | 2.57G    |
+| 1.12.0-rc.4 | gvisor | 1500  | 2.90G  | 4.68G    |
+| 1.11.15     | gvisor | 4064  | 2.31G  | 6.34G    |
+| 1.12.0-rc.4 | gvisor | 4064  | 7.54G  | 12.2G    |
+| 1.11.15     | gvisor | 65535 | 27.6G  | 18.1G    |
+| 1.12.0-rc.4 | gvisor | 65535 | 39.8G  | 34.7G    |
+| 1.11.15     | system | 1500  | 664M   | 706M     |
+| 1.12.0-rc.4 | system | 1500  | 2.44G  | 2.51G    |
+| 1.11.15     | system | 4064  | 1.88G  | 1.94G    |
+| 1.12.0-rc.4 | system | 4064  | 6.45G  | 6.27G    |
+| 1.11.15     | system | 65535 | 26.2G  | 17.4G    |
+| 1.12.0-rc.4 | system | 65535 | 17.6G  | 21.0G    |
+
+**18**:
+
+We continue to experience issues updating our sing-box apps on the App Store and Play Store.
+Until we rewrite and resubmit the apps, they are considered irrecoverable.
+Therefore, after this release, we will not be repeating this notice unless there is new information.
+
+### 1.11.15
+
+* Fixes and improvements
+
+_We are temporarily unable to update sing-box apps on the App Store because the reviewer mistakenly found that we
+violated the rules (TestFlight users are not affected)._
+
+#### 1.12.0-beta.32
+
+* Improve tun performance on Apple platforms **1**
+* Fixes and improvements
+
+**1**:
+
+We have significantly improved the performance of tun inbound on Apple platforms, especially in the gVisor stack.
+
+### 1.11.14
+
+* Fixes and improvements
+
+_We are temporarily unable to update sing-box apps on the App Store because the reviewer mistakenly found that we
+violated the rules (TestFlight users are not affected)._
+
+#### 1.12.0-beta.24
+
+* Allow `tls_fragment` and `tls_record_fragment` to be enabled together **1**
+* Also add fragment options for TLS client configuration **2**
+* Fixes and improvements
+
+**1**:
+
+For debugging only, it is recommended to disable if record fragmentation works.
+
+See [Route Action](/configuration/route/rule_action/#tls_fragment).
+
+**2**:
+
+See [TLS](/configuration/shared/tls/).
+
+#### 1.12.0-beta.23
+
+* Add loopback address support for tun **1**
+* Add cache support for ssm-api **2**
+* Fixes and improvements
+
+**1**:
+
+TUN now implements SideStore's StosVPN.
+
+See [Tun](/configuration/inbound/tun/#loopback_address).
+
+**2**:
+
+See [SSM API Service](/configuration/service/ssm-api/#cache_path).
+
+#### 1.12.0-beta.21
+
+* Fix missing `home` option for DERP service **1**
+* Fixes and improvements
+
+**1**:
+
+You can now choose what the DERP home page shows, just like with derper's `-home` flag.
+
+See [DERP](/configuration/service/derp/#home).
+
+### 1.11.13
+
+* Fixes and improvements
+
+_We are temporarily unable to update sing-box apps on the App Store because the reviewer mistakenly found that we
+violated the rules (TestFlight users are not affected)._
+
 #### 1.12.0-beta.17
 
 * Update quic-go to v0.52.0
@@ -211,7 +555,8 @@ See [AnyTLS Inbound](/configuration/inbound/anytls/) and [AnyTLS Outbound](/conf
 
 **2**:
 
-`resolve` route action now accepts `disable_cache` and other options like in DNS route actions, see [Route Action](/configuration/route/rule_action).
+`resolve` route action now accepts `disable_cache` and other options like in DNS route actions,
+see [Route Action](/configuration/route/rule_action).
 
 **3**:
 
@@ -242,7 +587,8 @@ See [Tailscale](/configuration/endpoint/tailscale/).
 
 Due to maintenance difficulties, sing-box 1.12.0 requires at least Go 1.23 to compile.
 
-For Windows 7 users, legacy binaries now continue to compile with Go 1.23 and patches from [MetaCubeX/go](https://github.com/MetaCubeX/go).
+For Windows 7 users, legacy binaries now continue to compile with Go 1.23 and patches
+from [MetaCubeX/go](https://github.com/MetaCubeX/go).
 
 ### 1.11.3
 

docs/clients/apple/index.md

@@ -9,7 +9,7 @@ platform-specific function implementation, such as TUN transparent proxy impleme
 
 !!! failure ""
 
-    We are temporarily unable to update sing-box apps on the App Store because the reviewer mistakenly found that we violated the rules (TestFlight users are not affected).
+    Due to non-technical reasons, we are temporarily unable to update the sing-box app on the App Store and release the standalone version of the macOS client (TestFlight users are not affected)
 
 ## :material-graph: Requirements
 
@@ -18,7 +18,7 @@ platform-specific function implementation, such as TUN transparent proxy impleme
 
 ## :material-download: Download
 
-* [App Store](https://apps.apple.com/app/sing-box-vt/id6673731168)
+* ~~[App Store](https://apps.apple.com/app/sing-box-vt/id6673731168)~~
 * TestFlight (Beta)
 
 TestFlight quota is only available to [sponsors](https://github.com/sponsors/nekohasekai)
@@ -26,15 +26,15 @@ TestFlight quota is only available to [sponsors](https://github.com/sponsors/nek
 Once you donate, you can get an invitation by join our Telegram group for sponsors from [@yet_another_sponsor_bot](https://t.me/yet_another_sponsor_bot)
 or sending us your Apple ID [via email](mailto:contact@sagernet.org).
 
-## :material-file-download: Download (macOS standalone version)
+## ~~:material-file-download: Download (macOS standalone version)~~
 
-* [Homebrew Cask](https://formulae.brew.sh/cask/sfm)
+* ~~[Homebrew Cask](https://formulae.brew.sh/cask/sfm)~~
 
 ```bash
-brew install sfm
+# brew install sfm
 ```
 
-* [GitHub Releases](https://github.com/SagerNet/sing-box/releases)
+* ~~[GitHub Releases](https://github.com/SagerNet/sing-box/releases)~~
 
 ## :material-source-repository: Source code
 

docs/configuration/dns/index.md

@@ -1,7 +1,11 @@
 ---
-icon: material/new-box
+icon: material/alert-decagram
 ---
 
+!!! quote "Changes in sing-box 1.12.0"
+
+    :material-decagram: [servers](#servers)
+
 !!! quote "Changes in sing-box 1.11.0"
 
     :material-plus: [cache_capacity](#cache_capacity)

docs/configuration/dns/index.zh.md

@@ -1,7 +1,11 @@
 ---
-icon: material/new-box
+icon: material/alert-decagram
 ---
 
+!!! quote "sing-box 1.12.0 中的更改"
+
+    :material-decagram: [servers](#servers)
+
 !!! quote "sing-box 1.11.0 中的更改"
 
     :material-plus: [cache_capacity](#cache_capacity)

docs/configuration/endpoint/index.zh.md

@@ -25,7 +25,7 @@ icon: material/new-box
 
 | 类型          | 格式                        |
 |-------------|---------------------------|
-| `wireguard` | [WireGuard](./wiregaurd/) |
+| `wireguard` | [WireGuard](./wireguard/) |
 | `tailscale` | [Tailscale](./tailscale/) |
 
 #### tag

docs/configuration/endpoint/wireguard.zh.md

@@ -61,7 +61,7 @@ WireGuard MTU。
 
 ==必填==
 
-接口的 IPv4/IPv6 地址或地址段的列表您。
+接口的 IPv4/IPv6 地址或地址段的列表。
 
 要分配给接口的 IP（v4 或 v6）地址段列表。
 

docs/configuration/experimental/clash-api.md

@@ -59,7 +59,7 @@
     {
       "external_controller": "0.0.0.0:9090",
       "external_ui": "dashboard"
-      // external_ui_download_detour: "direct"
+      // "external_ui_download_detour": "direct"
     }
     ```
 

docs/configuration/experimental/clash-api.zh.md

@@ -59,7 +59,7 @@
     {
       "external_controller": "0.0.0.0:9090",
       "external_ui": "dashboard"
-      // external_ui_download_detour: "direct"
+      // "external_ui_download_detour": "direct"
     }
     ```
 

docs/configuration/inbound/shadowsocks.md

@@ -9,6 +9,7 @@
 
   "method": "2022-blake3-aes-128-gcm",
   "password": "8JCsPssfgS8tiRwiMlhARg==",
+  "managed": false,
   "multiplex": {}
 }
 ```
@@ -86,6 +87,10 @@ Both if empty.
 | 2022 methods  | `sing-box generate rand --base64 <Key Length>` |
 | other methods | any string                                     |
 
+#### managed
+
+Defaults to `false`. Enable this when the inbound is managed by the [SSM API](/configuration/service/ssm-api) for dynamic user.
+
 #### multiplex
 
 See [Multiplex](/configuration/shared/multiplex#inbound) for details.

docs/configuration/inbound/shadowsocks.zh.md

@@ -9,6 +9,7 @@
 
   "method": "2022-blake3-aes-128-gcm",
   "password": "8JCsPssfgS8tiRwiMlhARg==",
+  "managed": false,
   "multiplex": {}
 }
 ```
@@ -86,6 +87,10 @@ See [Listen Fields](/configuration/shared/listen/) for details.
 | 2022 methods  | `sing-box generate rand --base64 <密钥长度>` |
 | other methods | 任意字符串                                    |
 
+#### managed
+
+默认为 `false`。当该入站需要由 [SSM API](/zh/configuration/service/ssm-api) 管理用户时必须启用此字段。
+
 #### multiplex
 
 参阅 [多路复用](/zh/configuration/shared/multiplex#inbound)。

docs/configuration/inbound/tun.md

@@ -1,7 +1,15 @@
 ---
-icon: material/alert-decagram
+icon: material/new-box
 ---
 
+!!! quote "Changes in sing-box 1.12.18"
+
+    :material-plus: [auto_redirect_iproute2_fallback_rule_index](#auto_redirect_iproute2_fallback_rule_index)
+
+!!! quote "Changes in sing-box 1.12.0"
+
+    :material-plus: [loopback_address](#loopback_address)
+
 !!! quote "Changes in sing-box 1.11.0"
 
     :material-delete-alert: [gso](#gso)  
@@ -56,9 +64,13 @@ icon: material/alert-decagram
   "auto_route": true,
   "iproute2_table_index": 2022,
   "iproute2_rule_index": 9000,
-  "auto_redirect": false,
+  "auto_redirect": true,
   "auto_redirect_input_mark": "0x2023",
   "auto_redirect_output_mark": "0x2024",
+  "auto_redirect_iproute2_fallback_rule_index": 32768,
+  "loopback_address": [
+    "10.7.0.1"
+  ],
   "strict_route": true,
   "route_address": [
     "0.0.0.0/1",
@@ -66,7 +78,6 @@ icon: material/alert-decagram
     "::/1",
     "8000::/1"
   ],
-  
   "route_exclude_address": [
     "192.168.0.0/16",
     "fc00::/7"
@@ -117,7 +128,6 @@ icon: material/alert-decagram
       "match_domain": []
     }
   },
-
   // Deprecated
   "gso": false,
   "inet4_address": [
@@ -140,8 +150,8 @@ icon: material/alert-decagram
   "inet6_route_exclude_address": [
     "fc00::/7"
   ],
-  
-  ... // Listen Fields
+  ...
+  // Listen Fields
 }
 ```
 
@@ -273,6 +283,27 @@ Connection output mark used by `auto_redirect`.
 
 `0x2024` is used by default.
 
+#### auto_redirect_iproute2_fallback_rule_index
+
+!!! question "Since sing-box 1.12.18"
+
+Linux iproute2 fallback rule index generated by `auto_redirect`.
+
+This rule is checked after system default rules (32766: main, 32767: default),
+routing traffic to the sing-box table only when no route is found in system tables.
+
+`32768` is used by default.
+
+#### loopback_address
+
+!!! question "Since sing-box 1.12.0"
+
+Loopback addresses make TCP connections to the specified address connect to the source address.
+
+Setting option value to `10.7.0.1` achieves the same behavior as SideStore/StosVPN.
+
+When `auto_redirect` is enabled, the same behavior can be achieved for LAN devices (not just local) as a gateway.
+
 #### strict_route
 
 Enforce strict routing rules when `auto_route` is enabled:

docs/configuration/inbound/tun.zh.md

@@ -1,7 +1,15 @@
 ---
-icon: material/alert-decagram
+icon: material/new-box
 ---
 
+!!! quote "sing-box 1.12.18 中的更改"
+
+    :material-plus: [auto_redirect_iproute2_fallback_rule_index](#auto_redirect_iproute2_fallback_rule_index)
+
+!!! quote "sing-box 1.12.0 中的更改"
+
+    :material-plus: [loopback_address](#loopback_address)
+
 !!! quote "sing-box 1.11.0 中的更改"
 
     :material-delete-alert: [gso](#gso)  
@@ -56,9 +64,13 @@ icon: material/alert-decagram
   "auto_route": true,
   "iproute2_table_index": 2022,
   "iproute2_rule_index": 9000,
-  "auto_redirect": false,
+  "auto_redirect": true,
   "auto_redirect_input_mark": "0x2023",
   "auto_redirect_output_mark": "0x2024",
+  "auto_redirect_iproute2_fallback_rule_index": 32768,
+  "loopback_address": [
+    "10.7.0.1"
+  ],
   "strict_route": true,
   "route_address": [
     "0.0.0.0/1",
@@ -270,6 +282,27 @@ tun 接口的 IPv6 前缀。
 
 默认使用 `0x2024`。
 
+#### auto_redirect_iproute2_fallback_rule_index
+
+!!! question "自 sing-box 1.12.18 起"
+
+`auto_redirect` 生成的 iproute2 回退规则索引。
+
+此规则在系统默认规则（32766: main，32767: default）之后检查，
+仅当系统路由表中未找到路由时才将流量路由到 sing-box 路由表。
+
+默认使用 `32768`。
+
+#### loopback_address
+
+!!! question "自 sing-box 1.12.0 起"
+
+环回地址是用于使指向指定地址的 TCP 连接连接到来源地址的。
+
+将选项值设置为 `10.7.0.1` 可实现与 SideStore/StosVPN 相同的行为。
+
+当启用 `auto_redirect` 时，可以作为网关为局域网设备（而不仅仅是本地）实现相同的行为。
+
 #### strict_route
 
 当启用 `auto_route` 时，强制执行严格的路由规则：
@@ -398,11 +431,11 @@ UDP NAT 过期时间。
 
 TCP/IP 栈。
 
-| 栈      | 描述                                                               |
-|--------|------------------------------------------------------------------|
-| system | 基于系统网络栈执行 L3 到 L4 转换                                             |
-| gVisor | 基于 [gVisor](https://github.com/google/gvisor) 虚拟网络栈执行 L3 到 L4 转换 |
-| mixed  | 混合 `system` TCP 栈与 `gvisor` UDP 栈                                |
+| 栈       | 描述                                                                                                  | 
+|----------|-------------------------------------------------------------------------------------------------------|
+| `system` | 基于系统网络栈执行 L3 到 L4 转换                                                                        |
+| `gvisor` | 基于 [gVisor](https://github.com/google/gvisor) 虚拟网络栈执行 L3 到 L4 转换                            |
+| `mixed`  | 混合 `system` TCP 栈与 `gvisor` UDP 栈                                                                 |
 
 默认使用 `mixed` 栈如果 gVisor 构建标记已启用，否则默认使用 `system` 栈。
 

docs/configuration/outbound/wireguard.zh.md

@@ -88,7 +88,7 @@ icon: material/delete-clock
 
 ==必填==
 
-接口的 IPv4/IPv6 地址或地址段的列表您。
+接口的 IPv4/IPv6 地址或地址段的列表。
 
 要分配给接口的 IP（v4 或 v6）地址段列表。
 

docs/configuration/route/rule_action.md

@@ -172,14 +172,12 @@ and should not be used to circumvent real censorship.
 Due to poor performance, try `tls_record_fragment` first, and only apply to server names known to be blocked.
 
 On Linux, Apple platforms, (administrator privileges required) Windows,
-the wait time can be automatically detected, otherwise it will fall back to
+the wait time can be automatically detected. Otherwise, it will fall back to
 waiting for a fixed time specified by `tls_fragment_fallback_delay`.
 
 In addition, if the actual wait time is less than 20ms, it will also fall back to waiting for a fixed time,
 because the target is considered to be local or behind a transparent proxy.
 
-Conflict with `tls_record_fragment`.
-
 #### tls_fragment_fallback_delay
 
 !!! question "Since sing-box 1.12.0"
@@ -194,11 +192,6 @@ The fallback value used when TLS segmentation cannot automatically determine the
 
 Fragment TLS handshake into multiple TLS records to bypass firewalls.
 
-This feature is intended to circumvent simple firewalls based on **plaintext packet matching**,
-and should not be used to circumvent real censorship.
-
-Conflict with `tls_fragment`.
-
 ### sniff
 
 ```json

docs/configuration/route/rule_action.zh.md

@@ -170,8 +170,6 @@ UDP 连接超时时间。
 
 此外，若实际等待时间小于 20 毫秒，同样会回退至固定等待时间模式，因为此时判定目标处于本地或透明代理之后。
 
-与 `tls_record_fragment` 冲突。
-
 #### tls_fragment_fallback_delay
 
 !!! question "自 sing-box 1.12.0 起"
@@ -186,10 +184,6 @@ UDP 连接超时时间。
 
 通过分段 TLS 握手数据包到多个 TLS 记录来绕过防火墙检测。
 
-此功能旨在规避基于**明文数据包匹配**的简单防火墙，不应该用于规避真的审查。
-
-与 `tls_fragment` 冲突。
-
 ### sniff
 
 ```json