Add expectedResponseCode to BurstObservatory

.github/workflows/release-win7.yml

@@ -1,117 +0,0 @@
-name: Build and Release for Windows 7
-
-on:
-  workflow_dispatch:
-  release:
-    types: [published]
-  push:
-  pull_request:
-    types: [opened, synchronize, reopened]
-
-jobs:
-  build:
-    permissions:
-      contents: write
-    strategy:
-      matrix:
-        include:
-          # BEGIN Windows 7
-          - goos: windows
-            goarch: amd64
-            assetname: win7-64
-          - goos: windows
-            goarch: 386
-            assetname: win7-32
-          # END Windows 7
-      fail-fast: false
-
-    runs-on: ubuntu-latest
-    env:
-      GOOS: ${{ matrix.goos}}
-      GOARCH: ${{ matrix.goarch }}
-      CGO_ENABLED: 0
-    steps:
-      - name: Checkout codebase
-        uses: actions/checkout@v4
-
-      - name: Show workflow information
-        run: |
-          _NAME=${{ matrix.assetname }}
-          echo "GOOS: ${{ matrix.goos }}, GOARCH: ${{ matrix.goarch }}, RELEASE_NAME: $_NAME"
-          echo "ASSET_NAME=$_NAME" >> $GITHUB_ENV
-
-      - name: Set up Go
-        uses: actions/setup-go@v5
-        with:
-          go-version-file: go.mod
-          check-latest: true
-
-      - name: Setup patched builder
-        run: |
-          GOSDK=$(go env GOROOT)
-          rm -r $GOSDK/*
-          cd $GOSDK
-          curl -O -L https://github.com/XTLS/go-win7/releases/latest/download/go-for-win7-linux-amd64.zip
-          unzip ./go-for-win7-linux-amd64.zip -d $GOSDK
-          rm ./go-for-win7-linux-amd64.zip
-
-      - name: Get project dependencies
-        run: go mod download
-
-      - name: Build Xray
-        run: |
-          mkdir -p build_assets
-          COMMID=$(git describe --always --dirty)
-          echo 'Building Xray for Windows 7...'
-          go build -o build_assets/xray.exe -trimpath -buildvcs=false -ldflags="-X github.com/xtls/xray-core/core.build=${COMMID} -s -w -buildid=" -v ./main
-          echo 'CreateObject("Wscript.Shell").Run "xray.exe -config config.json",0' > build_assets/xray_no_window.vbs
-          echo 'Start-Process -FilePath ".\xray.exe" -ArgumentList "-config .\config.json" -WindowStyle Hidden' > build_assets/xray_no_window.ps1
-          # The line below is for without running conhost.exe version. Commented for not being used. Provided for reference.
-          # go build -o build_assets/wxray.exe -trimpath -buildvcs=false -ldflags="-H windowsgui -X github.com/xtls/xray-core/core.build=${COMMID} -s -w -buildid=" -v ./main
-
-      - name: Restore Geodat Cache
-        uses: actions/cache/restore@v4
-        with:
-          path: resources
-          key: xray-geodat-
-
-      - name: Copy README.md & LICENSE
-        run: |
-          mv -f resources/* build_assets
-          cp ${GITHUB_WORKSPACE}/README.md ./build_assets/README.md
-          cp ${GITHUB_WORKSPACE}/LICENSE ./build_assets/LICENSE
-
-      - name: Create ZIP archive
-        if: github.event_name == 'release'
-        shell: bash
-        run: |
-          pushd build_assets || exit 1
-          touch -mt $(date +%Y01010000) *
-          zip -9vr ../Xray-${{ env.ASSET_NAME }}.zip .
-          popd || exit 1
-          FILE=./Xray-${{ env.ASSET_NAME }}.zip
-          DGST=$FILE.dgst
-          for METHOD in {"md5","sha1","sha256","sha512"}
-          do
-            openssl dgst -$METHOD $FILE | sed 's/([^)]*)//g' >>$DGST
-          done
-
-      - name: Change the name
-        run: |
-          mv build_assets Xray-${{ env.ASSET_NAME }}
-
-      - name: Upload files to Artifacts
-        uses: actions/upload-artifact@v4
-        with:
-          name: Xray-${{ env.ASSET_NAME }}
-          path: |
-            ./Xray-${{ env.ASSET_NAME }}/*
-
-      - name: Upload binaries to release
-        uses: svenstaro/upload-release-action@v2
-        if: github.event_name == 'release'
-        with:
-          repo_token: ${{ secrets.GITHUB_TOKEN }}
-          file: ./Xray-${{ env.ASSET_NAME }}.zip*
-          tag: ${{ github.ref }}
-          file_glob: true

.github/workflows/release.yml

@@ -1,15 +1,76 @@
 name: Build and Release
 
+# NOTE: This Github Actions file depends on the Makefile.
+#       Building the correct package requires the correct binaries generated by the Makefile. To 
+#       ensure the correct output, the Makefile must accept the appropriate input and compile the 
+#       correct file with the correct name. If you need to modify this file, please ensure it won't 
+#       disrupt the Makefile.
+
 on:
   workflow_dispatch:
   release:
     types: [published]
   push:
+    branches:
+      - main
+    paths:
+      - "**/*.go"
+      - "go.mod"
+      - "go.sum"
+      - ".github/workflows/release.yml"
   pull_request:
     types: [opened, synchronize, reopened]
-
+    paths:
+      - "**/*.go"
+      - "go.mod"
+      - "go.sum"
+      - ".github/workflows/release.yml"
 jobs:
+  prepare:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Restore Cache
+        uses: actions/cache/restore@v4
+        with:
+          path: resources
+          key: xray-geodat-
+
+      - name: Update Geodat
+        id: update
+        uses: nick-fields/retry@v3
+        with:
+          timeout_minutes: 60
+          retry_wait_seconds: 60
+          max_attempts: 60
+          command: |
+            [ -d 'resources' ] || mkdir resources
+            LIST=('geoip geoip geoip' 'domain-list-community dlc geosite')
+            for i in "${LIST[@]}"
+            do
+              INFO=($(echo $i | awk 'BEGIN{FS=" ";OFS=" "} {print $1,$2,$3}'))
+              FILE_NAME="${INFO[2]}.dat"
+              echo -e "Verifying HASH key..."
+              HASH="$(curl -sL "https://raw.githubusercontent.com/v2fly/${INFO[0]}/release/${INFO[1]}.dat.sha256sum" | awk -F ' ' '{print $1}')"
+              if [ -s "./resources/${FILE_NAME}" ] && [ "$(sha256sum "./resources/${FILE_NAME}" | awk -F ' ' '{print $1}')" == "${HASH}" ]; then
+                  continue
+              else
+                  echo -e "Downloading https://raw.githubusercontent.com/v2fly/${INFO[0]}/release/${INFO[1]}.dat..."
+                  curl -L "https://raw.githubusercontent.com/v2fly/${INFO[0]}/release/${INFO[1]}.dat" -o ./resources/${FILE_NAME}
+                  echo -e "Verifying HASH key..."
+                  [ "$(sha256sum "./resources/${FILE_NAME}" | awk -F ' ' '{print $1}')" == "${HASH}" ] || { echo -e "The HASH key of ${FILE_NAME} does not match cloud one."; exit 1; }
+                  echo "unhit=true" >> $GITHUB_OUTPUT
+              fi
+            done
+
+      - name: Save Cache
+        uses: actions/cache/save@v4
+        if: ${{ steps.update.outputs.unhit }}
+        with:
+          path: resources
+          key: xray-geodat-${{ github.sha }}-${{ github.run_number }}
+
   build:
+    needs: prepare
     permissions:
       contents: write
     strategy:
@@ -17,7 +78,9 @@ jobs:
         # Include amd64 on all platforms.
         goos: [windows, freebsd, openbsd, linux, darwin]
         goarch: [amd64, 386]
+        gotoolchain: [""]
         patch-assetname: [""]
+
         exclude:
           # Exclude i386 on darwin
           - goarch: 386
@@ -42,11 +105,6 @@ jobs:
           - goos: android
             goarch: arm64
           # END Android ARM 8
-          # BEGIN Android AMD64
-          - goos: android
-            goarch: amd64
-            patch-assetname: android-amd64
-          # END Android AMD64
           # Windows ARM
           - goos: windows
             goarch: arm64
@@ -97,6 +155,16 @@ jobs:
             goarch: arm
             goarm: 7
           # END OPENBSD ARM
+          # BEGIN Windows 7
+          - goos: windows
+            goarch: amd64
+            gotoolchain: 1.21.4
+            patch-assetname: win7-64
+          - goos: windows
+            goarch: 386
+            gotoolchain: 1.21.4
+            patch-assetname: win7-32
+          # END Windows 7
       fail-fast: false
 
     runs-on: ubuntu-latest
@@ -109,19 +177,6 @@ jobs:
       - name: Checkout codebase
         uses: actions/checkout@v4
 
-      - name: Set up NDK
-        if: matrix.goos == 'android'
-        run: |
-          wget -qO android-ndk.zip https://dl.google.com/android/repository/android-ndk-r28b-linux.zip
-          unzip android-ndk.zip
-          rm android-ndk.zip
-          declare -A arches=(
-            ["amd64"]="x86_64-linux-android24-clang"
-            ["arm64"]="aarch64-linux-android24-clang"
-          )
-          echo CC="$(realpath android-ndk-*/toolchains/llvm/prebuilt/linux-x86_64/bin)/${arches[${{ matrix.goarch }}]}" >> $GITHUB_ENV
-          echo CGO_ENABLED=1 >> $GITHUB_ENV
-
       - name: Show workflow information
         run: |
           _NAME=${{ matrix.patch-assetname }}
@@ -132,33 +187,19 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version-file: go.mod
+          go-version: ${{ matrix.gotoolchain || '1.23' }}
           check-latest: true
 
       - name: Get project dependencies
         run: go mod download
-
+      
       - name: Build Xray
         run: |
           mkdir -p build_assets
-          COMMID=$(git describe --always --dirty)
+          make
-          if [[ ${GOOS} == 'windows' ]]; then
+          find . -maxdepth 1 -type f -regex './\(wxray\|xray\|xray_softfloat\)\(\|.exe\)' -exec mv {} ./build_assets/ \;
-            echo 'Building Xray for Windows...'
-            go build -o build_assets/xray.exe -trimpath -buildvcs=false -ldflags="-X github.com/xtls/xray-core/core.build=${COMMID} -s -w -buildid=" -v ./main
-            echo 'CreateObject("Wscript.Shell").Run "xray.exe -config config.json",0' > build_assets/xray_no_window.vbs
-            echo 'Start-Process -FilePath ".\xray.exe" -ArgumentList "-config .\config.json" -WindowStyle Hidden' > build_assets/xray_no_window.ps1
-            # The line below is for without running conhost.exe version. Commented for not being used. Provided for reference.
-            # go build -o build_assets/wxray.exe -trimpath -buildvcs=false -ldflags="-H windowsgui -X github.com/xtls/xray-core/core.build=${COMMID} -s -w -buildid=" -v ./main
-          else
-            echo 'Building Xray...'
-            go build -o build_assets/xray -trimpath -buildvcs=false -ldflags="-X github.com/xtls/xray-core/core.build=${COMMID} -s -w -buildid=" -v ./main
-            if [[ ${GOARCH} == 'mips' || ${GOARCH} == 'mipsle' ]]; then
-              echo 'Building soft-float Xray for MIPS/MIPSLE 32-bit...'
-              GOMIPS=softfloat go build -o build_assets/xray_softfloat -trimpath -buildvcs=false -ldflags="-X github.com/xtls/xray-core/core.build=${COMMID} -s -w -buildid=" -v ./main
-            fi
-          fi
 
-      - name: Restore Geodat Cache
+      - name: Restore Cache
         uses: actions/cache/restore@v4
         with:
           path: resources

.github/workflows/scheduled-assets-update.yml

@@ -1,65 +0,0 @@
-name: Scheduled assets update
-
-# NOTE: This Github Actions is required by other actions, for preparing other packaging assets in a 
-#       routine manner, for example: GeoIP/GeoSite.
-#       Currently updating:
-#       - Geodat (GeoIP/Geosite)
-
-on:
-  workflow_dispatch:
-  schedule:
-    # Update GeoData on every day (22:30 UTC)
-    - cron: '30 22 * * *'
-  push:
-    # Prevent triggering update request storm
-    paths:
-      - ".github/workflows/scheduled-assets-update.yml"
-  pull_request:
-    # Prevent triggering update request storm
-    paths:
-      - ".github/workflows/scheduled-assets-update.yml"
-
-jobs:
-  geodat:
-    if: github.event.schedule == '30 22 * * *' || github.event_name == 'push'|| github.event_name == 'pull_request' || github.event_name == 'workflow_dispatch'
-    runs-on: ubuntu-latest
-    steps:
-      - name: Restore Geodat Cache
-        uses: actions/cache/restore@v4
-        with:
-          path: resources
-          key: xray-geodat-
-
-      - name: Update Geodat
-        id: update
-        uses: nick-fields/retry@v3
-        with:
-          timeout_minutes: 60
-          retry_wait_seconds: 60
-          max_attempts: 60
-          command: |
-            [ -d 'resources' ] || mkdir resources
-            LIST=('Loyalsoldier v2ray-rules-dat geoip geoip' 'Loyalsoldier v2ray-rules-dat geosite geosite')
-            for i in "${LIST[@]}"
-            do
-              INFO=($(echo $i | awk 'BEGIN{FS=" ";OFS=" "} {print $1,$2,$3,$4}'))
-              FILE_NAME="${INFO[3]}.dat"
-              echo -e "Verifying HASH key..."
-              HASH="$(curl -sL "https://raw.githubusercontent.com/${INFO[0]}/${INFO[1]}/release/${INFO[2]}.dat.sha256sum" | awk -F ' ' '{print $1}')"
-              if [ -s "./resources/${FILE_NAME}" ] && [ "$(sha256sum "./resources/${FILE_NAME}" | awk -F ' ' '{print $1}')" == "${HASH}" ]; then
-                  continue
-              else
-                  echo -e "Downloading https://raw.githubusercontent.com/${INFO[0]}/${INFO[1]}/release/${INFO[2]}.dat..."
-                  curl -L "https://raw.githubusercontent.com/${INFO[0]}/${INFO[1]}/release/${INFO[2]}.dat" -o ./resources/${FILE_NAME}
-                  echo -e "Verifying HASH key..."
-                  [ "$(sha256sum "./resources/${FILE_NAME}" | awk -F ' ' '{print $1}')" == "${HASH}" ] || { echo -e "The HASH key of ${FILE_NAME} does not match cloud one."; exit 1; }
-                  echo "unhit=true" >> $GITHUB_OUTPUT
-              fi
-            done
-
-      - name: Save Geodat Cache
-        uses: actions/cache/save@v4
-        if: ${{ steps.update.outputs.unhit }}
-        with:
-          path: resources
-          key: xray-geodat-${{ github.sha }}-${{ github.run_number }}

.github/workflows/test.yml

@@ -2,8 +2,20 @@ name: Test
 
 on:
   push:
+    branches:
+      - main
+    paths:
+      - "**/*.go"
+      - "go.mod"
+      - "go.sum"
+      - ".github/workflows/*.yml"
   pull_request:
     types: [opened, synchronize, reopened]
+    paths:
+      - "**/*.go"
+      - "go.mod"
+      - "go.sum"
+      - ".github/workflows/*.yml"
 
 jobs:
   test:
@@ -20,9 +32,9 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version-file: go.mod
+          go-version: '1.23'
           check-latest: true
-      - name: Restore Geodat Cache
+      - name: Restore Cache
         uses: actions/cache/restore@v4
         with:
           path: resources

.gitignore

@@ -14,18 +14,10 @@
 # Dependency directories (remove the comment below to include it)
 # vendor/
 
-# macOS specific files
 *.DS_Store
-
+.idea
-# IDE specific files
-.idea/
-.vscode/
-
-# Archive files
 *.zip
 *.tar.gz
-
-# Binaries
 xray
 xray_softfloat
 mockgen
@@ -34,13 +26,8 @@ vprotogen
 errorgen
 !common/errors/errorgen/
 *.dat
-
+.vscode
-# Build assets
 /build_assets
 
 # Output from dlv test
 **/debug.*
-
-# Certificates
-*.crt
-*.key

Makefile

@@ -0,0 +1,37 @@
+NAME = xray
+
+VERSION=$(shell git describe --always --dirty)
+
+# NOTE: This MAKEFILE can be used to build Xray-core locally and in Automatic workflows. It is \
+	provided for convenience in automatic building and functions as a part of it.
+# NOTE: If you need to modify this file, please be aware that:\
+	- This file is not the main Makefile; it only accepts environment variables and builds the \
+	binary.\
+	- Automatic building expects the correct binaries to be built by this Makefile. If you \
+	intend to propose a change to this Makefile, carefully review the file below and ensure \
+	that the change will not accidentally break the automatic building:\
+		.github/workflows/release.yml \
+	Otherwise it is recommended to contact the project maintainers.
+
+LDFLAGS = -X github.com/xtls/xray-core/core.build=$(VERSION) -s -w -buildid=
+PARAMS = -trimpath -ldflags "$(LDFLAGS)" -v
+MAIN = ./main
+PREFIX ?= $(shell go env GOPATH)
+ifeq ($(GOOS),windows)
+OUTPUT = $(NAME).exe
+ADDITION = go build -o w$(NAME).exe -trimpath -ldflags "-H windowsgui $(LDFLAGS)" -v $(MAIN)
+else
+OUTPUT = $(NAME)
+endif
+ifeq ($(shell echo "$(GOARCH)" | grep -Eq "(mips|mipsle)" && echo true),true) # 
+ADDITION = GOMIPS=softfloat go build -o $(NAME)_softfloat -trimpath -ldflags "$(LDFLAGS)" -v $(MAIN)
+endif
+.PHONY: clean build
+
+build:
+	go build -o $(OUTPUT) $(PARAMS) $(MAIN)
+	$(ADDITION)
+
+clean:
+	go clean -v -i $(PWD)
+	rm -f xray xray.exe wxray.exe xray_softfloat

README.md

@@ -6,9 +6,7 @@
 
 ## Donation & NFTs
 
-- **ETH/USDT/USDC: `0xDc3Fe44F0f25D13CACb1C4896CD0D321df3146Ee`**
+[Announcement of NFTs by Project X](https://github.com/XTLS/Xray-core/discussions/3633)
-- **Project X NFT: [Announcement of NFTs by Project X](https://github.com/XTLS/Xray-core/discussions/3633)**
-- **REALITY NFT: [XHTTP: Beyond REALITY](https://github.com/XTLS/Xray-core/discussions/4113)**
 
 ## License
 
@@ -24,9 +22,7 @@
 
 [Project X Channel](https://t.me/projectXtls)
 
-[Project VLESS](https://t.me/projectVless) (Русский)
+[Project VLESS](https://t.me/projectVless) (non-Chinese)
-
-[Project XHTTP](https://t.me/projectXhttp) (Persian)
 
 ## Installation
 
@@ -38,7 +34,6 @@
   - [teddysun/xray](https://hub.docker.com/r/teddysun/xray)
   - [wulabing/xray_docker](https://github.com/wulabing/xray_docker)
 - Web Panel - **WARNING: Please DO NOT USE plain HTTP panels like 3X-UI**, as they are believed to be bribed by Iran GFW for supporting plain HTTP by default and refused to change (https://github.com/XTLS/Xray-core/pull/3884#issuecomment-2439595331), which has already put many users' data security in danger in the past few years. **If you are already using 3X-UI, please switch to the following panels, which are verified to support HTTPS and SSH port forwarding only:**
-  - [Remnawave](https://github.com/remnawave/panel)
   - [Marzban](https://github.com/Gozargah/Marzban)
   - [Xray-UI](https://github.com/qist/xray-ui)
   - [Hiddify](https://github.com/hiddify/Hiddify-Manager)
@@ -75,8 +70,6 @@
   - [PassWall](https://github.com/xiaorouji/openwrt-passwall), [PassWall 2](https://github.com/xiaorouji/openwrt-passwall2)
   - [ShadowSocksR Plus+](https://github.com/fw876/helloworld)
   - [luci-app-xray](https://github.com/yichya/luci-app-xray) ([openwrt-xray](https://github.com/yichya/openwrt-xray))
-- Asuswrt-Merlin
-  - [XRAYUI](https://github.com/DanielLavrushin/asuswrt-merlin-xrayui)
 - Windows
   - [v2rayN](https://github.com/2dust/v2rayN)
   - [Furious](https://github.com/LorenEteval/Furious)
@@ -86,7 +79,6 @@
   - [X-flutter](https://github.com/XTLS/X-flutter)
   - [SaeedDev94/Xray](https://github.com/SaeedDev94/Xray)
 - iOS & macOS arm64
-  - [Happ](https://apps.apple.com/app/happ-proxy-utility/id6504287215)
   - [FoXray](https://apps.apple.com/app/foxray/id6448898396)
   - [Streisand](https://apps.apple.com/app/streisand/id6450534064)
 - macOS arm64 & x64
@@ -102,10 +94,8 @@
 
 - iOS & macOS arm64
   - [Shadowrocket](https://apps.apple.com/app/shadowrocket/id932747118)
-  - [Loon](https://apps.apple.com/us/app/loon/id1373567447)
 - Xray Tools
   - [xray-knife](https://github.com/lilendian0x00/xray-knife)
-  - [xray-checker](https://github.com/kutovoys/xray-checker)
 - Xray Wrapper
   - [XTLS/libXray](https://github.com/XTLS/libXray)
   - [xtlsapi](https://github.com/hiddify/xtlsapi)
@@ -115,9 +105,10 @@
 - [XrayR](https://github.com/XrayR-project/XrayR)
   - [XrayR-release](https://github.com/XrayR-project/XrayR-release)
   - [XrayR-V2Board](https://github.com/missuo/XrayR-V2Board)
-- Cores
+- [Clash.Meta](https://github.com/MetaCubeX/Clash.Meta)
-  - [mihomo](https://github.com/MetaCubeX/mihomo)
+  - [clashN](https://github.com/2dust/clashN)
-  - [sing-box](https://github.com/SagerNet/sing-box)
+  - [Clash Meta for Android](https://github.com/MetaCubeX/ClashMetaForAndroid)
+- [sing-box](https://github.com/SagerNet/sing-box)
 
 ## Contributing
 
@@ -128,27 +119,25 @@
 - [Xray-core v1.0.0](https://github.com/XTLS/Xray-core/releases/tag/v1.0.0) was forked from [v2fly-core 9a03cc5](https://github.com/v2fly/v2ray-core/commit/9a03cc5c98d04cc28320fcee26dbc236b3291256), and we have made & accumulated a huge number of enhancements over time, check [the release notes for each version](https://github.com/XTLS/Xray-core/releases).
 - For third-party projects used in [Xray-core](https://github.com/XTLS/Xray-core), check your local or [the latest go.mod](https://github.com/XTLS/Xray-core/blob/main/go.mod).
 
-## One-line Compilation
+## Compilation
 
 ### Windows (PowerShell)
 
 ```powershell
 $env:CGO_ENABLED=0
-go build -o xray.exe -trimpath -buildvcs=false -ldflags="-s -w -buildid=" -v ./main
+go build -o xray.exe -trimpath -ldflags "-s -w -buildid=" ./main
 ```
 
 ### Linux / macOS
 
 ```bash
-CGO_ENABLED=0 go build -o xray -trimpath -buildvcs=false -ldflags="-s -w -buildid=" -v ./main
+CGO_ENABLED=0 go build -o xray -trimpath -ldflags "-s -w -buildid=" ./main
 ```
 
 ### Reproducible Releases
 
-Make sure that you are using the same Go version, and remember to set the git commit id (7 bytes):
-
 ```bash
-CGO_ENABLED=0 go build -o xray -trimpath -buildvcs=false -ldflags="-X github.com/xtls/xray-core/core.build=REPLACE -s -w -buildid=" -v ./main
+make
 ```
 
 ## Stargazers over time

app/dispatcher/default.go

@@ -33,21 +33,23 @@ type cachedReader struct {
 	cache  buf.MultiBuffer
 }
 
-func (r *cachedReader) Cache(b *buf.Buffer, deadline time.Duration) error {
+func (r *cachedReader) Cache(b *buf.Buffer) {
-	mb, err := r.reader.ReadMultiBufferTimeout(deadline)
+	mb, _ := r.reader.ReadMultiBufferTimeout(time.Millisecond * 100)
-	if err != nil {
-		return err
-	}
 	r.Lock()
 	if !mb.IsEmpty() {
 		r.cache, _ = buf.MergeMulti(r.cache, mb)
 	}
-	b.Clear()
+	cacheLen := r.cache.Len()
-	rawBytes := b.Extend(min(r.cache.Len(), b.Cap()))
+	if cacheLen <= b.Cap() {
+		b.Clear()
+	} else {
+		b.Release()
+		*b = *buf.NewWithSize(cacheLen)
+	}
+	rawBytes := b.Extend(cacheLen)
 	n := r.cache.Copy(rawBytes)
 	b.Resize(0, int32(n))
 	r.Unlock()
-	return nil
 }
 
 func (r *cachedReader) readInternal() buf.MultiBuffer {
@@ -104,7 +106,7 @@ func init() {
 	common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
 		d := new(DefaultDispatcher)
 		if err := core.RequireFeatures(ctx, func(om outbound.Manager, router routing.Router, pm policy.Manager, sm stats.Manager, dc dns.Client) error {
-			core.OptionalFeatures(ctx, func(fdns dns.FakeDNSEngine) {
+			core.RequireFeatures(ctx, func(fdns dns.FakeDNSEngine) {
 				d.fdns = fdns
 			})
 			return d.Init(config.(*Config), om, router, pm, sm, dc)
@@ -353,7 +355,7 @@ func (d *DefaultDispatcher) DispatchLink(ctx context.Context, destination net.De
 }
 
 func sniffer(ctx context.Context, cReader *cachedReader, metadataOnly bool, network net.Network) (SniffResult, error) {
-	payload := buf.NewWithSize(32767)
+	payload := buf.New()
 	defer payload.Release()
 
 	sniffer := NewSniffer(ctx)
@@ -365,33 +367,26 @@ func sniffer(ctx context.Context, cReader *cachedReader, metadataOnly bool, netw
 	}
 
 	contentResult, contentErr := func() (SniffResult, error) {
-		cacheDeadline := 200 * time.Millisecond
 		totalAttempt := 0
 		for {
 			select {
 			case <-ctx.Done():
 				return nil, ctx.Err()
 			default:
-				cachingStartingTimeStamp := time.Now()
+				totalAttempt++
-				cacheErr := cReader.Cache(payload, cacheDeadline)
+				if totalAttempt > 2 {
-				cachingTimeElapsed := time.Since(cachingStartingTimeStamp)
+					return nil, errSniffingTimeout
-				cacheDeadline -= cachingTimeElapsed
+				}
 
+				cReader.Cache(payload)
 				if !payload.IsEmpty() {
 					result, err := sniffer.Sniff(ctx, payload.Bytes(), network)
-					switch err {
+					if err != common.ErrNoClue {
-					case common.ErrNoClue: // No Clue: protocol not matches, and sniffer cannot determine whether there will be a match or not
-						totalAttempt++
-					case protocol.ErrProtoNeedMoreData: // Protocol Need More Data: protocol matches, but need more data to complete sniffing
-						if cacheErr != nil { // Cache error (e.g. timeout) counts for failed attempt
-							totalAttempt++
-						}
-					default:
 						return result, err
 					}
 				}
-				if totalAttempt >= 2 || cacheDeadline <= 0 {
+				if payload.IsFull() {
-					return nil, errSniffingTimeout
+					return nil, errUnknownContent
 				}
 			}
 		}

app/dispatcher/sniffer.go

@@ -6,7 +6,6 @@ import (
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
-	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/common/protocol/bittorrent"
 	"github.com/xtls/xray-core/common/protocol/http"
 	"github.com/xtls/xray-core/common/protocol/quic"
@@ -59,17 +58,14 @@ var errUnknownContent = errors.New("unknown content")
 func (s *Sniffer) Sniff(c context.Context, payload []byte, network net.Network) (SniffResult, error) {
 	var pendingSniffer []protocolSnifferWithMetadata
 	for _, si := range s.sniffer {
-		protocolSniffer := si.protocolSniffer
+		s := si.protocolSniffer
 		if si.metadataSniffer || si.network != network {
 			continue
 		}
-		result, err := protocolSniffer(c, payload)
+		result, err := s(c, payload)
 		if err == common.ErrNoClue {
 			pendingSniffer = append(pendingSniffer, si)
 			continue
-		} else if err == protocol.ErrProtoNeedMoreData { // Sniffer protocol matched, but need more data to complete sniffing
-			s.sniffer = []protocolSnifferWithMetadata{si}
-			return nil, err
 		}
 
 		if err == nil && result != nil {

app/dns/cache_controller.go

@@ -1,188 +0,0 @@
-package dns
-
-import (
-	"context"
-	go_errors "errors"
-	"github.com/xtls/xray-core/common"
-	"github.com/xtls/xray-core/common/errors"
-	"github.com/xtls/xray-core/common/net"
-	"github.com/xtls/xray-core/common/signal/pubsub"
-	"github.com/xtls/xray-core/common/task"
-	dns_feature "github.com/xtls/xray-core/features/dns"
-	"golang.org/x/net/dns/dnsmessage"
-	"sync"
-	"time"
-)
-
-type CacheController struct {
-	sync.RWMutex
-	ips          map[string]*record
-	pub          *pubsub.Service
-	cacheCleanup *task.Periodic
-	name         string
-	disableCache bool
-}
-
-func NewCacheController(name string, disableCache bool) *CacheController {
-	c := &CacheController{
-		name:         name,
-		disableCache: disableCache,
-		ips:          make(map[string]*record),
-		pub:          pubsub.NewService(),
-	}
-
-	c.cacheCleanup = &task.Periodic{
-		Interval: time.Minute,
-		Execute:  c.CacheCleanup,
-	}
-	return c
-}
-
-// CacheCleanup clears expired items from cache
-func (c *CacheController) CacheCleanup() error {
-	now := time.Now()
-	c.Lock()
-	defer c.Unlock()
-
-	if len(c.ips) == 0 {
-		return errors.New("nothing to do. stopping...")
-	}
-
-	for domain, record := range c.ips {
-		if record.A != nil && record.A.Expire.Before(now) {
-			record.A = nil
-		}
-		if record.AAAA != nil && record.AAAA.Expire.Before(now) {
-			record.AAAA = nil
-		}
-
-		if record.A == nil && record.AAAA == nil {
-			errors.LogDebug(context.Background(), c.name, "cache cleanup ", domain)
-			delete(c.ips, domain)
-		} else {
-			c.ips[domain] = record
-		}
-	}
-
-	if len(c.ips) == 0 {
-		c.ips = make(map[string]*record)
-	}
-
-	return nil
-}
-
-func (c *CacheController) updateIP(req *dnsRequest, ipRec *IPRecord) {
-	elapsed := time.Since(req.start)
-
-	c.Lock()
-	rec, found := c.ips[req.domain]
-	if !found {
-		rec = &record{}
-	}
-
-	switch req.reqType {
-	case dnsmessage.TypeA:
-		rec.A = ipRec
-	case dnsmessage.TypeAAAA:
-		rec.AAAA = ipRec
-	}
-
-	errors.LogInfo(context.Background(), c.name, " got answer: ", req.domain, " ", req.reqType, " -> ", ipRec.IP, " ", elapsed)
-	c.ips[req.domain] = rec
-
-	switch req.reqType {
-	case dnsmessage.TypeA:
-		c.pub.Publish(req.domain+"4", nil)
-		if !c.disableCache {
-			_, _, err := rec.AAAA.getIPs()
-			if !go_errors.Is(err, errRecordNotFound) {
-				c.pub.Publish(req.domain+"6", nil)
-			}
-		}
-	case dnsmessage.TypeAAAA:
-		c.pub.Publish(req.domain+"6", nil)
-		if !c.disableCache {
-			_, _, err := rec.A.getIPs()
-			if !go_errors.Is(err, errRecordNotFound) {
-				c.pub.Publish(req.domain+"4", nil)
-			}
-		}
-	}
-
-	c.Unlock()
-	common.Must(c.cacheCleanup.Start())
-}
-
-func (c *CacheController) findIPsForDomain(domain string, option dns_feature.IPOption) ([]net.IP, uint32, error) {
-	c.RLock()
-	record, found := c.ips[domain]
-	c.RUnlock()
-
-	if !found {
-		return nil, 0, errRecordNotFound
-	}
-
-	var errs []error
-	var allIPs []net.IP
-	var rTTL uint32 = dns_feature.DefaultTTL
-
-	mergeReq := option.IPv4Enable && option.IPv6Enable
-
-	if option.IPv4Enable {
-		ips, ttl, err := record.A.getIPs()
-		if !mergeReq || go_errors.Is(err, errRecordNotFound) {
-			return ips, ttl, err
-		}
-		if ttl < rTTL {
-			rTTL = ttl
-		}
-		if len(ips) > 0 {
-			allIPs = append(allIPs, ips...)
-		} else {
-			errs = append(errs, err)
-		}
-	}
-
-	if option.IPv6Enable {
-		ips, ttl, err := record.AAAA.getIPs()
-		if !mergeReq || go_errors.Is(err, errRecordNotFound) {
-			return ips, ttl, err
-		}
-		if ttl < rTTL {
-			rTTL = ttl
-		}
-		if len(ips) > 0 {
-			allIPs = append(allIPs, ips...)
-		} else {
-			errs = append(errs, err)
-		}
-	}
-
-	if len(allIPs) > 0 {
-		return allIPs, rTTL, nil
-	}
-	if go_errors.Is(errs[0], errs[1]) {
-		return nil, rTTL, errs[0]
-	}
-	return nil, rTTL, errors.Combine(errs...)
-}
-
-func (c *CacheController) registerSubscribers(domain string, option dns_feature.IPOption) (sub4 *pubsub.Subscriber, sub6 *pubsub.Subscriber) {
-	// ipv4 and ipv6 belong to different subscription groups
-	if option.IPv4Enable {
-		sub4 = c.pub.Subscribe(domain + "4")
-	}
-	if option.IPv6Enable {
-		sub6 = c.pub.Subscribe(domain + "6")
-	}
-	return
-}
-
-func closeSubscribers(sub4 *pubsub.Subscriber, sub6 *pubsub.Subscriber) {
-	if sub4 != nil {
-		sub4.Close()
-	}
-	if sub6 != nil {
-		sub6.Close()
-	}
-}

app/dns/config.pb.go

@@ -128,16 +128,13 @@ type NameServer struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Address            *net.Endpoint                `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"`
+	Address           *net.Endpoint                `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"`
-	ClientIp           []byte                       `protobuf:"bytes,5,opt,name=client_ip,json=clientIp,proto3" json:"client_ip,omitempty"`
+	ClientIp          []byte                       `protobuf:"bytes,5,opt,name=client_ip,json=clientIp,proto3" json:"client_ip,omitempty"`
-	SkipFallback       bool                         `protobuf:"varint,6,opt,name=skipFallback,proto3" json:"skipFallback,omitempty"`
+	SkipFallback      bool                         `protobuf:"varint,6,opt,name=skipFallback,proto3" json:"skipFallback,omitempty"`
-	PrioritizedDomain  []*NameServer_PriorityDomain `protobuf:"bytes,2,rep,name=prioritized_domain,json=prioritizedDomain,proto3" json:"prioritized_domain,omitempty"`
+	PrioritizedDomain []*NameServer_PriorityDomain `protobuf:"bytes,2,rep,name=prioritized_domain,json=prioritizedDomain,proto3" json:"prioritized_domain,omitempty"`
-	Geoip              []*router.GeoIP              `protobuf:"bytes,3,rep,name=geoip,proto3" json:"geoip,omitempty"`
+	Geoip             []*router.GeoIP              `protobuf:"bytes,3,rep,name=geoip,proto3" json:"geoip,omitempty"`
-	OriginalRules      []*NameServer_OriginalRule   `protobuf:"bytes,4,rep,name=original_rules,json=originalRules,proto3" json:"original_rules,omitempty"`
+	OriginalRules     []*NameServer_OriginalRule   `protobuf:"bytes,4,rep,name=original_rules,json=originalRules,proto3" json:"original_rules,omitempty"`
-	QueryStrategy      QueryStrategy                `protobuf:"varint,7,opt,name=query_strategy,json=queryStrategy,proto3,enum=xray.app.dns.QueryStrategy" json:"query_strategy,omitempty"`
+	QueryStrategy     QueryStrategy                `protobuf:"varint,7,opt,name=query_strategy,json=queryStrategy,proto3,enum=xray.app.dns.QueryStrategy" json:"query_strategy,omitempty"`
-	AllowUnexpectedIPs bool                         `protobuf:"varint,8,opt,name=allowUnexpectedIPs,proto3" json:"allowUnexpectedIPs,omitempty"`
-	Tag                string                       `protobuf:"bytes,9,opt,name=tag,proto3" json:"tag,omitempty"`
-	TimeoutMs          uint64                       `protobuf:"varint,10,opt,name=timeoutMs,proto3" json:"timeoutMs,omitempty"`
 }
 
 func (x *NameServer) Reset() {
@@ -219,27 +216,6 @@ func (x *NameServer) GetQueryStrategy() QueryStrategy {
 	return QueryStrategy_USE_IP
 }
 
-func (x *NameServer) GetAllowUnexpectedIPs() bool {
-	if x != nil {
-		return x.AllowUnexpectedIPs
-	}
-	return false
-}
-
-func (x *NameServer) GetTag() string {
-	if x != nil {
-		return x.Tag
-	}
-	return ""
-}
-
-func (x *NameServer) GetTimeoutMs() uint64 {
-	if x != nil {
-		return x.TimeoutMs
-	}
-	return 0
-}
-
 type Config struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -532,7 +508,7 @@ var file_app_dns_config_proto_rawDesc = []byte{
 	0x2e, 0x64, 0x6e, 0x73, 0x1a, 0x1c, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2f, 0x6e, 0x65, 0x74,
 	0x2f, 0x64, 0x65, 0x73, 0x74, 0x69, 0x6e, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f,
 	0x74, 0x6f, 0x1a, 0x17, 0x61, 0x70, 0x70, 0x2f, 0x72, 0x6f, 0x75, 0x74, 0x65, 0x72, 0x2f, 0x63,
-	0x6f, 0x6e, 0x66, 0x69, 0x67, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x92, 0x05, 0x0a, 0x0a,
+	0x6f, 0x6e, 0x66, 0x69, 0x67, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0xb2, 0x04, 0x0a, 0x0a,
 	0x4e, 0x61, 0x6d, 0x65, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x12, 0x33, 0x0a, 0x07, 0x61, 0x64,
 	0x64, 0x72, 0x65, 0x73, 0x73, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x19, 0x2e, 0x78, 0x72,
 	0x61, 0x79, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x6e, 0x65, 0x74, 0x2e, 0x45, 0x6e,
@@ -558,13 +534,7 @@ var file_app_dns_config_proto_rawDesc = []byte{
 	0x72, 0x61, 0x74, 0x65, 0x67, 0x79, 0x18, 0x07, 0x20, 0x01, 0x28, 0x0e, 0x32, 0x1b, 0x2e, 0x78,
 	0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x64, 0x6e, 0x73, 0x2e, 0x51, 0x75, 0x65, 0x72,
 	0x79, 0x53, 0x74, 0x72, 0x61, 0x74, 0x65, 0x67, 0x79, 0x52, 0x0d, 0x71, 0x75, 0x65, 0x72, 0x79,
-	0x53, 0x74, 0x72, 0x61, 0x74, 0x65, 0x67, 0x79, 0x12, 0x2e, 0x0a, 0x12, 0x61, 0x6c, 0x6c, 0x6f,
+	0x53, 0x74, 0x72, 0x61, 0x74, 0x65, 0x67, 0x79, 0x1a, 0x5e, 0x0a, 0x0e, 0x50, 0x72, 0x69, 0x6f,
-	0x77, 0x55, 0x6e, 0x65, 0x78, 0x70, 0x65, 0x63, 0x74, 0x65, 0x64, 0x49, 0x50, 0x73, 0x18, 0x08,
-	0x20, 0x01, 0x28, 0x08, 0x52, 0x12, 0x61, 0x6c, 0x6c, 0x6f, 0x77, 0x55, 0x6e, 0x65, 0x78, 0x70,
-	0x65, 0x63, 0x74, 0x65, 0x64, 0x49, 0x50, 0x73, 0x12, 0x10, 0x0a, 0x03, 0x74, 0x61, 0x67, 0x18,
-	0x09, 0x20, 0x01, 0x28, 0x09, 0x52, 0x03, 0x74, 0x61, 0x67, 0x12, 0x1c, 0x0a, 0x09, 0x74, 0x69,
-	0x6d, 0x65, 0x6f, 0x75, 0x74, 0x4d, 0x73, 0x18, 0x0a, 0x20, 0x01, 0x28, 0x04, 0x52, 0x09, 0x74,
-	0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74, 0x4d, 0x73, 0x1a, 0x5e, 0x0a, 0x0e, 0x50, 0x72, 0x69, 0x6f,
 	0x72, 0x69, 0x74, 0x79, 0x44, 0x6f, 0x6d, 0x61, 0x69, 0x6e, 0x12, 0x34, 0x0a, 0x04, 0x74, 0x79,
 	0x70, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0e, 0x32, 0x20, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e,
 	0x61, 0x70, 0x70, 0x2e, 0x64, 0x6e, 0x73, 0x2e, 0x44, 0x6f, 0x6d, 0x61, 0x69, 0x6e, 0x4d, 0x61,

app/dns/config.proto

@@ -28,9 +28,6 @@ message NameServer {
   repeated xray.app.router.GeoIP geoip = 3;
   repeated OriginalRule original_rules = 4;
   QueryStrategy query_strategy = 7;
-  bool allowUnexpectedIPs = 8;
-  string tag = 9;
-  uint64 timeoutMs = 10;
 }
 
 enum DomainMatchingType {

app/dns/dns.go

@@ -3,12 +3,11 @@ package dns
 
 import (
 	"context"
-	go_errors "errors"
 	"fmt"
-	"sort"
 	"strings"
 	"sync"
 
+	"github.com/xtls/xray-core/app/router"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
@@ -20,6 +19,8 @@ import (
 // DNS is a DNS rely server.
 type DNS struct {
 	sync.Mutex
+	tag                    string
+	disableCache           bool
 	disableFallback        bool
 	disableFallbackIfMatch bool
 	ipOption               *dns.IPOption
@@ -38,6 +39,13 @@ type DomainMatcherInfo struct {
 
 // New creates a new DNS server with given configuration.
 func New(ctx context.Context, config *Config) (*DNS, error) {
+	var tag string
+	if len(config.Tag) > 0 {
+		tag = config.Tag
+	} else {
+		tag = generateRandomTag()
+	}
+
 	var clientIP net.IP
 	switch len(config.ClientIp) {
 	case 0, net.IPv4len, net.IPv6len:
@@ -46,28 +54,26 @@ func New(ctx context.Context, config *Config) (*DNS, error) {
 		return nil, errors.New("unexpected client IP length ", len(config.ClientIp))
 	}
 
-	var ipOption dns.IPOption
+	var ipOption *dns.IPOption
 	switch config.QueryStrategy {
 	case QueryStrategy_USE_IP:
-		ipOption = dns.IPOption{
+		ipOption = &dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
 		}
 	case QueryStrategy_USE_IP4:
-		ipOption = dns.IPOption{
+		ipOption = &dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: false,
 			FakeEnable: false,
 		}
 	case QueryStrategy_USE_IP6:
-		ipOption = dns.IPOption{
+		ipOption = &dns.IPOption{
 			IPv4Enable: false,
 			IPv6Enable: true,
 			FakeEnable: false,
 		}
-	default:
-		return nil, errors.New("unexpected query strategy ", config.QueryStrategy)
 	}
 
 	hosts, err := NewStaticHosts(config.StaticHosts)
@@ -75,14 +81,8 @@ func New(ctx context.Context, config *Config) (*DNS, error) {
 		return nil, errors.New("failed to create hosts").Base(err)
 	}
 
-	var clients []*Client
+	clients := []*Client{}
 	domainRuleCount := 0
-
-	var defaultTag = config.Tag
-	if len(config.Tag) == 0 {
-		defaultTag = generateRandomTag()
-	}
-
 	for _, ns := range config.NameServer {
 		domainRuleCount += len(ns.PrioritizedDomain)
 	}
@@ -90,6 +90,7 @@ func New(ctx context.Context, config *Config) (*DNS, error) {
 	// MatcherInfos is ensured to cover the maximum index domainMatcher could return, where matcher's index starts from 1
 	matcherInfos := make([]*DomainMatcherInfo, domainRuleCount+1)
 	domainMatcher := &strmatcher.MatcherGroup{}
+	geoipContainer := router.GeoIPMatcherContainer{}
 
 	for _, ns := range config.NameServer {
 		clientIdx := len(clients)
@@ -107,18 +108,7 @@ func New(ctx context.Context, config *Config) (*DNS, error) {
 		case net.IPv4len, net.IPv6len:
 			myClientIP = net.IP(ns.ClientIp)
 		}
-
+		client, err := NewClient(ctx, ns, myClientIP, geoipContainer, &matcherInfos, updateDomain)
-		disableCache := config.DisableCache
-
-		var tag = defaultTag
-		if len(ns.Tag) > 0 {
-			tag = ns.Tag
-		}
-		clientIPOption := ResolveIpOptionOverride(ns.QueryStrategy, ipOption)
-		if !clientIPOption.IPv4Enable && !clientIPOption.IPv6Enable {
-			return nil, errors.New("no QueryStrategy available for ", ns.Address)
-		}
-		client, err := NewClient(ctx, ns, myClientIP, disableCache, tag, clientIPOption, &matcherInfos, updateDomain)
 		if err != nil {
 			return nil, errors.New("failed to create client").Base(err)
 		}
@@ -127,16 +117,18 @@ func New(ctx context.Context, config *Config) (*DNS, error) {
 
 	// If there is no DNS client in config, add a `localhost` DNS client
 	if len(clients) == 0 {
-		clients = append(clients, NewLocalDNSClient(ipOption))
+		clients = append(clients, NewLocalDNSClient())
 	}
 
 	return &DNS{
+		tag:                    tag,
 		hosts:                  hosts,
-		ipOption:               &ipOption,
+		ipOption:               ipOption,
 		clients:                clients,
 		ctx:                    ctx,
 		domainMatcher:          domainMatcher,
 		matcherInfos:           matcherInfos,
+		disableCache:           config.DisableCache,
 		disableFallback:        config.DisableFallback,
 		disableFallbackIfMatch: config.DisableFallbackIfMatch,
 	}, nil
@@ -160,87 +152,62 @@ func (s *DNS) Close() error {
 // IsOwnLink implements proxy.dns.ownLinkVerifier
 func (s *DNS) IsOwnLink(ctx context.Context) bool {
 	inbound := session.InboundFromContext(ctx)
-	if inbound == nil {
+	return inbound != nil && inbound.Tag == s.tag
-		return false
-	}
-	for _, client := range s.clients {
-		if client.tag == inbound.Tag {
-			return true
-		}
-	}
-	return false
 }
 
 // LookupIP implements dns.Client.
-func (s *DNS) LookupIP(domain string, option dns.IPOption) ([]net.IP, uint32, error) {
+func (s *DNS) LookupIP(domain string, option dns.IPOption) ([]net.IP, error) {
-	// Normalize the FQDN form query
-	domain = strings.TrimSuffix(domain, ".")
 	if domain == "" {
-		return nil, 0, errors.New("empty domain name")
+		return nil, errors.New("empty domain name")
 	}
 
 	option.IPv4Enable = option.IPv4Enable && s.ipOption.IPv4Enable
 	option.IPv6Enable = option.IPv6Enable && s.ipOption.IPv6Enable
 
 	if !option.IPv4Enable && !option.IPv6Enable {
-		return nil, 0, dns.ErrEmptyResponse
+		return nil, dns.ErrEmptyResponse
 	}
 
+	// Normalize the FQDN form query
+	domain = strings.TrimSuffix(domain, ".")
+
 	// Static host lookup
 	switch addrs := s.hosts.Lookup(domain, option); {
 	case addrs == nil: // Domain not recorded in static host
 		break
 	case len(addrs) == 0: // Domain recorded, but no valid IP returned (e.g. IPv4 address with only IPv6 enabled)
-		return nil, 0, dns.ErrEmptyResponse
+		return nil, dns.ErrEmptyResponse
 	case len(addrs) == 1 && addrs[0].Family().IsDomain(): // Domain replacement
 		errors.LogInfo(s.ctx, "domain replaced: ", domain, " -> ", addrs[0].Domain())
 		domain = addrs[0].Domain()
 	default: // Successfully found ip records in static host
 		errors.LogInfo(s.ctx, "returning ", len(addrs), " IP(s) for domain ", domain, " -> ", addrs)
-		ips, err := toNetIP(addrs)
+		return toNetIP(addrs)
-		if err != nil {
-			return nil, 0, err
-		}
-		return ips, 10, nil // Hosts ttl is 10
 	}
 
 	// Name servers lookup
-	var errs []error
+	errs := []error{}
+	ctx := session.ContextWithInbound(s.ctx, &session.Inbound{Tag: s.tag})
 	for _, client := range s.sortClients(domain) {
 		if !option.FakeEnable && strings.EqualFold(client.Name(), "FakeDNS") {
 			errors.LogDebug(s.ctx, "skip DNS resolution for domain ", domain, " at server ", client.Name())
 			continue
 		}
-
+		ips, err := client.QueryIP(ctx, domain, option, s.disableCache)
-		ips, ttl, err := client.QueryIP(s.ctx, domain, option)
-
 		if len(ips) > 0 {
-			if ttl == 0 {
+			return ips, nil
-				ttl = 1
-			}
-			return ips, ttl, nil
 		}
-
+		if err != nil {
-		errors.LogInfoInner(s.ctx, err, "failed to lookup ip for domain ", domain, " at server ", client.Name())
+			errors.LogInfoInner(s.ctx, err, "failed to lookup ip for domain ", domain, " at server ", client.Name())
-		if err == nil {
+			errs = append(errs, err)
-			err = dns.ErrEmptyResponse
+		}
+		// 5 for RcodeRefused in miekg/dns, hardcode to reduce binary size
+		if err != context.Canceled && err != context.DeadlineExceeded && err != errExpectedIPNonMatch && err != dns.ErrEmptyResponse && dns.RCodeFromError(err) != 5 {
+			return nil, err
 		}
-		errs = append(errs, err)
-
 	}
 
-	if len(errs) > 0 {
+	return nil, errors.New("returning nil for domain ", domain).Base(errors.Combine(errs...))
-		allErrs := errors.Combine(errs...)
-		err0 := errs[0]
-		if errors.AllEqual(err0, allErrs) {
-			if go_errors.Is(err0, dns.ErrEmptyResponse) {
-				return nil, 0, dns.ErrEmptyResponse
-			}
-			return nil, 0, errors.New("returning nil for domain ", domain).Base(err0)
-		}
-		return nil, 0, errors.New("returning nil for domain ", domain).Base(allErrs)
-	}
-	return nil, 0, dns.ErrEmptyResponse
 }
 
 // LookupHosts implements dns.HostsLookup.
@@ -259,6 +226,22 @@ func (s *DNS) LookupHosts(domain string) *net.Address {
 	return nil
 }
 
+// GetIPOption implements ClientWithIPOption.
+func (s *DNS) GetIPOption() *dns.IPOption {
+	return s.ipOption
+}
+
+// SetQueryOption implements ClientWithIPOption.
+func (s *DNS) SetQueryOption(isIPv4Enable, isIPv6Enable bool) {
+	s.ipOption.IPv4Enable = isIPv4Enable
+	s.ipOption.IPv6Enable = isIPv6Enable
+}
+
+// SetFakeDNSOption implements ClientWithIPOption.
+func (s *DNS) SetFakeDNSOption(isFakeEnable bool) {
+	s.ipOption.FakeEnable = isFakeEnable
+}
+
 func (s *DNS) sortClients(domain string) []*Client {
 	clients := make([]*Client, 0, len(s.clients))
 	clientUsed := make([]bool, len(s.clients))
@@ -267,11 +250,7 @@ func (s *DNS) sortClients(domain string) []*Client {
 
 	// Priority domain matching
 	hasMatch := false
-	MatchSlice := s.domainMatcher.Match(domain)
+	for _, match := range s.domainMatcher.Match(domain) {
-	sort.Slice(MatchSlice, func(i, j int) bool {
-		return MatchSlice[i] < MatchSlice[j]
-	})
-	for _, match := range MatchSlice {
 		info := s.matcherInfos[match]
 		client := s.clients[info.clientIdx]
 		domainRule := client.domains[info.domainRuleIdx]

app/dns/dns_test.go

@@ -76,9 +76,6 @@ func (*staticHandler) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 		case q.Name == "notexist.google.com." && q.Qtype == dns.TypeAAAA:
 			ans.MsgHdr.Rcode = dns.RcodeNameError
 
-		case q.Name == "notexist.google.com." && q.Qtype == dns.TypeA:
-			ans.MsgHdr.Rcode = dns.RcodeNameError
-
 		case q.Name == "hostname." && q.Qtype == dns.TypeA:
 			rr, _ := dns.NewRR("hostname. IN A 127.0.0.1")
 			ans.Answer = append(ans.Answer, rr)
@@ -120,6 +117,7 @@ func TestUDPServerSubnet(t *testing.T) {
 		Handler: &staticHandler{},
 		UDPSize: 1200,
 	}
+
 	go dnsServer.ListenAndServe()
 	time.Sleep(time.Second)
 
@@ -157,7 +155,7 @@ func TestUDPServerSubnet(t *testing.T) {
 
 	client := v.GetFeature(feature_dns.ClientType()).(feature_dns.Client)
 
-	ips, _, err := client.LookupIP("google.com", feature_dns.IPOption{
+	ips, err := client.LookupIP("google.com", feature_dns.IPOption{
 		IPv4Enable: true,
 		IPv6Enable: true,
 		FakeEnable: false,
@@ -218,7 +216,7 @@ func TestUDPServer(t *testing.T) {
 	client := v.GetFeature(feature_dns.ClientType()).(feature_dns.Client)
 
 	{
-		ips, _, err := client.LookupIP("google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -233,7 +231,7 @@ func TestUDPServer(t *testing.T) {
 	}
 
 	{
-		ips, _, err := client.LookupIP("facebook.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("facebook.com", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -248,7 +246,7 @@ func TestUDPServer(t *testing.T) {
 	}
 
 	{
-		_, _, err := client.LookupIP("notexist.google.com", feature_dns.IPOption{
+		_, err := client.LookupIP("notexist.google.com", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -262,7 +260,7 @@ func TestUDPServer(t *testing.T) {
 	}
 
 	{
-		ips, _, err := client.LookupIP("ipv4only.google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("ipv4only.google.com", feature_dns.IPOption{
 			IPv4Enable: false,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -278,7 +276,7 @@ func TestUDPServer(t *testing.T) {
 	dnsServer.Shutdown()
 
 	{
-		ips, _, err := client.LookupIP("google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -359,7 +357,7 @@ func TestPrioritizedDomain(t *testing.T) {
 	startTime := time.Now()
 
 	{
-		ips, _, err := client.LookupIP("google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -425,7 +423,7 @@ func TestUDPServerIPv6(t *testing.T) {
 
 	client := v.GetFeature(feature_dns.ClientType()).(feature_dns.Client)
 	{
-		ips, _, err := client.LookupIP("ipv6.google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("ipv6.google.com", feature_dns.IPOption{
 			IPv4Enable: false,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -494,7 +492,7 @@ func TestStaticHostDomain(t *testing.T) {
 	client := v.GetFeature(feature_dns.ClientType()).(feature_dns.Client)
 
 	{
-		ips, _, err := client.LookupIP("example.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("example.com", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -605,7 +603,7 @@ func TestIPMatch(t *testing.T) {
 	startTime := time.Now()
 
 	{
-		ips, _, err := client.LookupIP("google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -728,7 +726,7 @@ func TestLocalDomain(t *testing.T) {
 	startTime := time.Now()
 
 	{ // Will match dotless:
-		ips, _, err := client.LookupIP("hostname", feature_dns.IPOption{
+		ips, err := client.LookupIP("hostname", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -743,7 +741,7 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match domain:local
-		ips, _, err := client.LookupIP("hostname.local", feature_dns.IPOption{
+		ips, err := client.LookupIP("hostname.local", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -758,7 +756,7 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match static ip
-		ips, _, err := client.LookupIP("hostnamestatic", feature_dns.IPOption{
+		ips, err := client.LookupIP("hostnamestatic", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -773,7 +771,7 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match domain replacing
-		ips, _, err := client.LookupIP("hostnamealias", feature_dns.IPOption{
+		ips, err := client.LookupIP("hostnamealias", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -787,8 +785,8 @@ func TestLocalDomain(t *testing.T) {
 		}
 	}
 
-	{ // Will match dotless:localhost, but not expectedIPs: 127.0.0.2, 127.0.0.3, then matches at dotless:
+	{ // Will match dotless:localhost, but not expectIPs: 127.0.0.2, 127.0.0.3, then matches at dotless:
-		ips, _, err := client.LookupIP("localhost", feature_dns.IPOption{
+		ips, err := client.LookupIP("localhost", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -802,8 +800,8 @@ func TestLocalDomain(t *testing.T) {
 		}
 	}
 
-	{ // Will match dotless:localhost, and expectedIPs: 127.0.0.2, 127.0.0.3
+	{ // Will match dotless:localhost, and expectIPs: 127.0.0.2, 127.0.0.3
-		ips, _, err := client.LookupIP("localhost-a", feature_dns.IPOption{
+		ips, err := client.LookupIP("localhost-a", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -817,8 +815,8 @@ func TestLocalDomain(t *testing.T) {
 		}
 	}
 
-	{ // Will match dotless:localhost, and expectedIPs: 127.0.0.2, 127.0.0.3
+	{ // Will match dotless:localhost, and expectIPs: 127.0.0.2, 127.0.0.3
-		ips, _, err := client.LookupIP("localhost-b", feature_dns.IPOption{
+		ips, err := client.LookupIP("localhost-b", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -833,7 +831,7 @@ func TestLocalDomain(t *testing.T) {
 	}
 
 	{ // Will match dotless:
-		ips, _, err := client.LookupIP("Mijia Cloud", feature_dns.IPOption{
+		ips, err := client.LookupIP("Mijia Cloud", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -999,7 +997,7 @@ func TestMultiMatchPrioritizedDomain(t *testing.T) {
 	startTime := time.Now()
 
 	{ // Will match server 1,2 and server 1 returns expected ip
-		ips, _, err := client.LookupIP("google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("google.com", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -1014,7 +1012,7 @@ func TestMultiMatchPrioritizedDomain(t *testing.T) {
 	}
 
 	{ // Will match server 1,2 and server 1 returns unexpected ip, then server 2 returns expected one
-		ips, _, err := client.LookupIP("ipv6.google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("ipv6.google.com", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: false,
 			FakeEnable: false,
@@ -1029,7 +1027,7 @@ func TestMultiMatchPrioritizedDomain(t *testing.T) {
 	}
 
 	{ // Will match server 3,1,2 and server 3 returns expected one
-		ips, _, err := client.LookupIP("api.google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("api.google.com", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,
@@ -1044,7 +1042,7 @@ func TestMultiMatchPrioritizedDomain(t *testing.T) {
 	}
 
 	{ // Will match server 4,3,1,2 and server 4 returns expected one
-		ips, _, err := client.LookupIP("v2.api.google.com", feature_dns.IPOption{
+		ips, err := client.LookupIP("v2.api.google.com", feature_dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,

app/dns/dnscommon.go

@@ -31,31 +31,30 @@ type record struct {
 
 // IPRecord is a cacheable item for a resolved domain
 type IPRecord struct {
-	ReqID     uint16
+	ReqID  uint16
-	IP        []net.IP
+	IP     []net.Address
-	Expire    time.Time
+	Expire time.Time
-	RCode     dnsmessage.RCode
+	RCode  dnsmessage.RCode
-	RawHeader *dnsmessage.Header
 }
 
-func (r *IPRecord) getIPs() ([]net.IP, uint32, error) {
+func (r *IPRecord) getIPs() ([]net.Address, error) {
-	if r == nil {
+	if r == nil || r.Expire.Before(time.Now()) {
-		return nil, 0, errRecordNotFound
+		return nil, errRecordNotFound
 	}
-	untilExpire := time.Until(r.Expire)
-	if untilExpire <= 0 {
-		return nil, 0, errRecordNotFound
-	}
-
-	ttl := uint32(untilExpire/time.Second) + uint32(1)
 	if r.RCode != dnsmessage.RCodeSuccess {
-		return nil, ttl, dns_feature.RCodeError(r.RCode)
+		return nil, dns_feature.RCodeError(r.RCode)
-	}
-	if len(r.IP) == 0 {
-		return nil, ttl, dns_feature.ErrEmptyResponse
 	}
+	return r.IP, nil
+}
 
-	return r.IP, ttl, nil
+func isNewer(baseRec *IPRecord, newRec *IPRecord) bool {
+	if newRec == nil {
+		return false
+	}
+	if baseRec == nil {
+		return true
+	}
+	return baseRec.Expire.Before(newRec.Expire)
 }
 
 var errRecordNotFound = errors.New("record not found")
@@ -68,59 +67,49 @@ type dnsRequest struct {
 	msg     *dnsmessage.Message
 }
 
-func genEDNS0Options(clientIP net.IP, padding int) *dnsmessage.Resource {
+func genEDNS0Options(clientIP net.IP) *dnsmessage.Resource {
-	if len(clientIP) == 0 && padding == 0 {
+	if len(clientIP) == 0 {
 		return nil
 	}
 
-	const EDNS0SUBNET = 0x8
+	var netmask int
-	const EDNS0PADDING = 0xc
+	var family uint16
+
+	if len(clientIP) == 4 {
+		family = 1
+		netmask = 24 // 24 for IPV4, 96 for IPv6
+	} else {
+		family = 2
+		netmask = 96
+	}
+
+	b := make([]byte, 4)
+	binary.BigEndian.PutUint16(b[0:], family)
+	b[2] = byte(netmask)
+	b[3] = 0
+	switch family {
+	case 1:
+		ip := clientIP.To4().Mask(net.CIDRMask(netmask, net.IPv4len*8))
+		needLength := (netmask + 8 - 1) / 8 // division rounding up
+		b = append(b, ip[:needLength]...)
+	case 2:
+		ip := clientIP.Mask(net.CIDRMask(netmask, net.IPv6len*8))
+		needLength := (netmask + 8 - 1) / 8 // division rounding up
+		b = append(b, ip[:needLength]...)
+	}
+
+	const EDNS0SUBNET = 0x08
 
 	opt := new(dnsmessage.Resource)
 	common.Must(opt.Header.SetEDNS0(1350, 0xfe00, true))
-	body := dnsmessage.OPTResource{}
-	opt.Body = &body
 
-	if len(clientIP) != 0 {
+	opt.Body = &dnsmessage.OPTResource{
-		var netmask int
+		Options: []dnsmessage.Option{
-		var family uint16
+			{
-
-		if len(clientIP) == 4 {
-			family = 1
-			netmask = 24 // 24 for IPV4, 96 for IPv6
-		} else {
-			family = 2
-			netmask = 96
-		}
-
-		b := make([]byte, 4)
-		binary.BigEndian.PutUint16(b[0:], family)
-		b[2] = byte(netmask)
-		b[3] = 0
-		switch family {
-		case 1:
-			ip := clientIP.To4().Mask(net.CIDRMask(netmask, net.IPv4len*8))
-			needLength := (netmask + 8 - 1) / 8 // division rounding up
-			b = append(b, ip[:needLength]...)
-		case 2:
-			ip := clientIP.Mask(net.CIDRMask(netmask, net.IPv6len*8))
-			needLength := (netmask + 8 - 1) / 8 // division rounding up
-			b = append(b, ip[:needLength]...)
-		}
-
-		body.Options = append(body.Options,
-			dnsmessage.Option{
 				Code: EDNS0SUBNET,
 				Data: b,
-			})
+			},
-	}
+		},
-
-	if padding != 0 {
-		body.Options = append(body.Options,
-			dnsmessage.Option{
-				Code: EDNS0PADDING,
-				Data: make([]byte, padding),
-			})
 	}
 
 	return opt
@@ -190,10 +179,9 @@ func parseResponse(payload []byte) (*IPRecord, error) {
 
 	now := time.Now()
 	ipRecord := &IPRecord{
-		ReqID:     h.ID,
+		ReqID:  h.ID,
-		RCode:     h.RCode,
+		RCode:  h.RCode,
-		Expire:    now.Add(time.Second * dns_feature.DefaultTTL),
+		Expire: now.Add(time.Second * 600),
-		RawHeader: &h,
 	}
 
 L:
@@ -208,7 +196,7 @@ L:
 
 		ttl := ah.TTL
 		if ttl == 0 {
-			ttl = 1
+			ttl = 600
 		}
 		expire := now.Add(time.Duration(ttl) * time.Second)
 		if ipRecord.Expire.After(expire) {
@@ -222,17 +210,14 @@ L:
 				errors.LogInfoInner(context.Background(), err, "failed to parse A record for domain: ", ah.Name)
 				break L
 			}
-			ipRecord.IP = append(ipRecord.IP, net.IPAddress(ans.A[:]).IP())
+			ipRecord.IP = append(ipRecord.IP, net.IPAddress(ans.A[:]))
 		case dnsmessage.TypeAAAA:
 			ans, err := parser.AAAAResource()
 			if err != nil {
 				errors.LogInfoInner(context.Background(), err, "failed to parse AAAA record for domain: ", ah.Name)
 				break L
 			}
-			newIP := net.IPAddress(ans.AAAA[:]).IP()
+			ipRecord.IP = append(ipRecord.IP, net.IPAddress(ans.AAAA[:]))
-			if len(newIP) == net.IPv6len {
-				ipRecord.IP = append(ipRecord.IP, newIP)
-			}
 		default:
 			if err := parser.SkipAnswer(); err != nil {
 				errors.LogInfoInner(context.Background(), err, "failed to skip answer")

app/dns/dnscommon_test.go

@@ -51,7 +51,7 @@ func Test_parseResponse(t *testing.T) {
 	}{
 		{
 			"empty",
-			&IPRecord{0, []net.IP(nil), time.Time{}, dnsmessage.RCodeSuccess, nil},
+			&IPRecord{0, []net.Address(nil), time.Time{}, dnsmessage.RCodeSuccess},
 			false,
 		},
 		{
@@ -63,16 +63,15 @@ func Test_parseResponse(t *testing.T) {
 			"a record",
 			&IPRecord{
 				1,
-				[]net.IP{net.ParseIP("8.8.8.8"), net.ParseIP("8.8.4.4")},
+				[]net.Address{net.ParseAddress("8.8.8.8"), net.ParseAddress("8.8.4.4")},
 				time.Time{},
 				dnsmessage.RCodeSuccess,
-				nil,
 			},
 			false,
 		},
 		{
 			"aaaa record",
-			&IPRecord{2, []net.IP{net.ParseIP("2001::123:8888"), net.ParseIP("2001::123:8844")}, time.Time{}, dnsmessage.RCodeSuccess, nil},
+			&IPRecord{2, []net.Address{net.ParseAddress("2001::123:8888"), net.ParseAddress("2001::123:8844")}, time.Time{}, dnsmessage.RCodeSuccess},
 			false,
 		},
 	}
@@ -85,9 +84,8 @@ func Test_parseResponse(t *testing.T) {
 			}
 
 			if got != nil {
-				// reset the time and RawHeader
+				// reset the time
 				got.Expire = time.Time{}
-				got.RawHeader = nil
 			}
 			if cmp.Diff(got, tt.want) != "" {
 				t.Error(cmp.Diff(got, tt.want))
@@ -156,7 +154,7 @@ func Test_genEDNS0Options(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			if got := genEDNS0Options(tt.args.clientIP, 0); got == nil {
+			if got := genEDNS0Options(tt.args.clientIP); got == nil {
 				t.Errorf("genEDNS0Options() = %v, want %v", got, tt.want)
 			}
 		})

app/dns/hosts.go

@@ -2,7 +2,6 @@ package dns
 
 import (
 	"context"
-	"sort"
 
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
@@ -42,6 +41,8 @@ func NewStaticHosts(hosts []*Config_HostMapping) (*StaticHosts, error) {
 				}
 				ips = append(ips, addr)
 			}
+		default:
+			return nil, errors.New("neither IP address nor proxied domain specified for domain: ", mapping.Domain).AtWarning()
 		}
 
 		sh.ips[id] = ips
@@ -61,20 +62,17 @@ func filterIP(ips []net.Address, option dns.IPOption) []net.Address {
 }
 
 func (h *StaticHosts) lookupInternal(domain string) []net.Address {
-	MatchSlice := h.matchers.Match(domain)
+	var ips []net.Address
-	sort.Slice(MatchSlice, func(i, j int) bool {
+	for _, id := range h.matchers.Match(domain) {
-		return MatchSlice[i] < MatchSlice[j]
+		ips = append(ips, h.ips[id]...)
-	})
-	if len(MatchSlice) == 0 {
-		return nil
 	}
-	return h.ips[MatchSlice[0]]
+	return ips
 }
 
 func (h *StaticHosts) lookup(domain string, option dns.IPOption, maxDepth int) []net.Address {
 	switch addrs := h.lookupInternal(domain); {
 	case len(addrs) == 0: // Not recorded in static hosts, return nil
-		return addrs
+		return nil
 	case len(addrs) == 1 && addrs[0].Family().IsDomain(): // Try to unwrap domain
 		errors.LogDebug(context.Background(), "found replaced domain: ", domain, " -> ", addrs[0].Domain(), ". Try to unwrap it")
 		if maxDepth > 0 {

app/dns/nameserver.go

@@ -9,7 +9,6 @@ import (
 	"github.com/xtls/xray-core/app/router"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
-	"github.com/xtls/xray-core/common/session"
 	"github.com/xtls/xray-core/common/strmatcher"
 	"github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/dns"
@@ -21,23 +20,22 @@ type Server interface {
 	// Name of the Client.
 	Name() string
 	// QueryIP sends IP queries to its configured server.
-	QueryIP(ctx context.Context, domain string, option dns.IPOption) ([]net.IP, uint32, error)
+	QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns.IPOption, disableCache bool) ([]net.IP, error)
 }
 
 // Client is the interface for DNS client.
 type Client struct {
-	server             Server
+	server       Server
-	skipFallback       bool
+	clientIP     net.IP
-	domains            []string
+	skipFallback bool
-	expectedIPs        []*router.GeoIPMatcher
+	domains      []string
-	allowUnexpectedIPs bool
+	expectIPs    []*router.GeoIPMatcher
-	tag                string
-	timeoutMs          time.Duration
-	ipOption           *dns.IPOption
 }
 
+var errExpectedIPNonMatch = errors.New("expectIPs not match")
+
 // NewServer creates a name server object according to the network destination url.
-func NewServer(ctx context.Context, dest net.Destination, dispatcher routing.Dispatcher, disableCache bool, clientIP net.IP) (Server, error) {
+func NewServer(dest net.Destination, dispatcher routing.Dispatcher, queryStrategy QueryStrategy) (Server, error) {
 	if address := dest.Address; address.Family().IsDomain() {
 		u, err := url.Parse(address.Domain())
 		if err != nil {
@@ -46,36 +44,25 @@ func NewServer(ctx context.Context, dest net.Destination, dispatcher routing.Dis
 		switch {
 		case strings.EqualFold(u.String(), "localhost"):
 			return NewLocalNameServer(), nil
-		case strings.EqualFold(u.Scheme, "https"): // DNS-over-HTTPS Remote mode
+		case strings.EqualFold(u.Scheme, "https"): // DOH Remote mode
-			return NewDoHNameServer(u, dispatcher, false, disableCache, clientIP), nil
+			return NewDoHNameServer(u, dispatcher, queryStrategy)
-		case strings.EqualFold(u.Scheme, "h2c"): // DNS-over-HTTPS h2c Remote mode
+		case strings.EqualFold(u.Scheme, "https+local"): // DOH Local mode
-			return NewDoHNameServer(u, dispatcher, true, disableCache, clientIP), nil
+			return NewDoHLocalNameServer(u, queryStrategy), nil
-		case strings.EqualFold(u.Scheme, "https+local"): // DNS-over-HTTPS Local mode
-			return NewDoHNameServer(u, nil, false, disableCache, clientIP), nil
-		case strings.EqualFold(u.Scheme, "h2c+local"): // DNS-over-HTTPS h2c Local mode
-			return NewDoHNameServer(u, nil, true, disableCache, clientIP), nil
 		case strings.EqualFold(u.Scheme, "quic+local"): // DNS-over-QUIC Local mode
-			return NewQUICNameServer(u, disableCache, clientIP)
+			return NewQUICNameServer(u, queryStrategy)
 		case strings.EqualFold(u.Scheme, "tcp"): // DNS-over-TCP Remote mode
-			return NewTCPNameServer(u, dispatcher, disableCache, clientIP)
+			return NewTCPNameServer(u, dispatcher, queryStrategy)
 		case strings.EqualFold(u.Scheme, "tcp+local"): // DNS-over-TCP Local mode
-			return NewTCPLocalNameServer(u, disableCache, clientIP)
+			return NewTCPLocalNameServer(u, queryStrategy)
 		case strings.EqualFold(u.String(), "fakedns"):
-			var fd dns.FakeDNSEngine
+			return NewFakeDNSServer(), nil
-			err = core.RequireFeatures(ctx, func(fdns dns.FakeDNSEngine) {
-				fd = fdns
-			})
-			if err != nil {
-				return nil, err
-			}
-			return NewFakeDNSServer(fd), nil
 		}
 	}
 	if dest.Network == net.Network_Unknown {
 		dest.Network = net.Network_UDP
 	}
 	if dest.Network == net.Network_UDP { // UDP classic DNS mode
-		return NewClassicNameServer(dest, dispatcher, disableCache, clientIP), nil
+		return NewClassicNameServer(dest, dispatcher, queryStrategy), nil
 	}
 	return nil, errors.New("No available name server could be created from ", dest).AtWarning()
 }
@@ -85,9 +72,7 @@ func NewClient(
 	ctx context.Context,
 	ns *NameServer,
 	clientIP net.IP,
-	disableCache bool,
+	container router.GeoIPMatcherContainer,
-	tag string,
-	ipOption dns.IPOption,
 	matcherInfos *[]*DomainMatcherInfo,
 	updateDomainRule func(strmatcher.Matcher, int, []*DomainMatcherInfo) error,
 ) (*Client, error) {
@@ -95,7 +80,7 @@ func NewClient(
 
 	err := core.RequireFeatures(ctx, func(dispatcher routing.Dispatcher) error {
 		// Create a new server for each client for now
-		server, err := NewServer(ctx, ns.Address.AsDestination(), dispatcher, disableCache, clientIP)
+		server, err := NewServer(ns.Address.AsDestination(), dispatcher, ns.GetQueryStrategy())
 		if err != nil {
 			return errors.New("failed to create nameserver").Base(err).AtWarning()
 		}
@@ -152,7 +137,7 @@ func NewClient(
 		// Establish expected IPs
 		var matchers []*router.GeoIPMatcher
 		for _, geoip := range ns.Geoip {
-			matcher, err := router.GlobalGeoIPContainer.Add(geoip)
+			matcher, err := container.Add(geoip)
 			if err != nil {
 				return errors.New("failed to create ip matcher").Base(err).AtWarning()
 			}
@@ -164,23 +149,15 @@ func NewClient(
 			case *net.IPOrDomain_Domain:
 				errors.LogInfo(ctx, "DNS: client ", ns.Address.Address.GetDomain(), " uses clientIP ", clientIP.String())
 			case *net.IPOrDomain_Ip:
-				errors.LogInfo(ctx, "DNS: client ", net.IP(ns.Address.Address.GetIp()), " uses clientIP ", clientIP.String())
+				errors.LogInfo(ctx, "DNS: client ", ns.Address.Address.GetIp(), " uses clientIP ", clientIP.String())
 			}
 		}
 
-		var timeoutMs = 4000 * time.Millisecond
-		if ns.TimeoutMs > 0 {
-			timeoutMs = time.Duration(ns.TimeoutMs) * time.Millisecond
-		}
-
 		client.server = server
+		client.clientIP = clientIP
 		client.skipFallback = ns.SkipFallback
 		client.domains = rules
-		client.expectedIPs = matchers
+		client.expectIPs = matchers
-		client.allowUnexpectedIPs = ns.AllowUnexpectedIPs
-		client.tag = tag
-		client.timeoutMs = timeoutMs
-		client.ipOption = &ipOption
 		return nil
 	})
 	return client, err
@@ -192,53 +169,36 @@ func (c *Client) Name() string {
 }
 
 // QueryIP sends DNS query to the name server with the client's IP.
-func (c *Client) QueryIP(ctx context.Context, domain string, option dns.IPOption) ([]net.IP, uint32, error) {
+func (c *Client) QueryIP(ctx context.Context, domain string, option dns.IPOption, disableCache bool) ([]net.IP, error) {
-	option.IPv4Enable = option.IPv4Enable && c.ipOption.IPv4Enable
+	ctx, cancel := context.WithTimeout(ctx, 4*time.Second)
-	option.IPv6Enable = option.IPv6Enable && c.ipOption.IPv6Enable
+	ips, err := c.server.QueryIP(ctx, domain, c.clientIP, option, disableCache)
-	if !option.IPv4Enable && !option.IPv6Enable {
-		return nil, 0, dns.ErrEmptyResponse
-	}
-
-	ctx, cancel := context.WithTimeout(ctx, c.timeoutMs)
-	ctx = session.ContextWithInbound(ctx, &session.Inbound{Tag: c.tag})
-	ips, ttl, err := c.server.QueryIP(ctx, domain, option)
 	cancel()
 
 	if err != nil {
-		return nil, 0, err
+		return ips, err
 	}
-
+	return c.MatchExpectedIPs(domain, ips)
-	if len(ips) == 0 {
-		return nil, 0, dns.ErrEmptyResponse
-	}
-
-	if len(c.expectedIPs) > 0 {
-		newIps := c.MatchExpectedIPs(domain, ips)
-		if len(newIps) == 0 {
-			if !c.allowUnexpectedIPs {
-				return nil, 0, dns.ErrEmptyResponse
-			}
-		} else {
-			ips = newIps
-		}
-	}
-
-	return ips, ttl, nil
 }
 
 // MatchExpectedIPs matches queried domain IPs with expected IPs and returns matched ones.
-func (c *Client) MatchExpectedIPs(domain string, ips []net.IP) []net.IP {
+func (c *Client) MatchExpectedIPs(domain string, ips []net.IP) ([]net.IP, error) {
-	var newIps []net.IP
+	if len(c.expectIPs) == 0 {
+		return ips, nil
+	}
+	newIps := []net.IP{}
 	for _, ip := range ips {
-		for _, matcher := range c.expectedIPs {
+		for _, matcher := range c.expectIPs {
 			if matcher.Match(ip) {
 				newIps = append(newIps, ip)
 				break
 			}
 		}
 	}
-	errors.LogDebug(context.Background(), "domain ", domain, " expectedIPs ", newIps, " matched at server ", c.Name())
+	if len(newIps) == 0 {
-	return newIps
+		return nil, errExpectedIPNonMatch
+	}
+	errors.LogDebug(context.Background(), "domain ", domain, " expectIPs ", newIps, " matched at server ", c.Name())
+	return newIps, nil
 }
 
 func ResolveIpOptionOverride(queryStrategy QueryStrategy, ipOption dns.IPOption) dns.IPOption {

app/dns/nameserver_doh.go

@@ -3,136 +3,237 @@ package dns
 import (
 	"bytes"
 	"context"
-	"crypto/tls"
-	go_errors "errors"
 	"fmt"
 	"io"
 	"net/http"
 	"net/url"
-	"strings"
+	"sync"
+	"sync/atomic"
 	"time"
 
-	utls "github.com/refraction-networking/utls"
 	"github.com/xtls/xray-core/common"
-	"github.com/xtls/xray-core/common/crypto"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/log"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/net/cnc"
 	"github.com/xtls/xray-core/common/protocol/dns"
 	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/common/signal/pubsub"
+	"github.com/xtls/xray-core/common/task"
 	dns_feature "github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/transport/internet"
-	"golang.org/x/net/http2"
+	"golang.org/x/net/dns/dnsmessage"
 )
 
 // DoHNameServer implemented DNS over HTTPS (RFC8484) Wire Format,
 // which is compatible with traditional dns over udp(RFC1035),
 // thus most of the DOH implementation is copied from udpns.go
 type DoHNameServer struct {
-	cacheController *CacheController
+	dispatcher routing.Dispatcher
-	httpClient      *http.Client
+	sync.RWMutex
-	dohURL          string
+	ips           map[string]*record
-	clientIP        net.IP
+	pub           *pubsub.Service
+	cleanup       *task.Periodic
+	reqID         uint32
+	httpClient    *http.Client
+	dohURL        string
+	name          string
+	queryStrategy QueryStrategy
 }
 
-// NewDoHNameServer creates DOH/DOHL client object for remote/local resolving.
+// NewDoHNameServer creates DOH server object for remote resolving.
-func NewDoHNameServer(url *url.URL, dispatcher routing.Dispatcher, h2c bool, disableCache bool, clientIP net.IP) *DoHNameServer {
+func NewDoHNameServer(url *url.URL, dispatcher routing.Dispatcher, queryStrategy QueryStrategy) (*DoHNameServer, error) {
-	url.Scheme = "https"
+	errors.LogInfo(context.Background(), "DNS: created Remote DOH client for ", url.String())
-	mode := "DOH"
+	s := baseDOHNameServer(url, "DOH", queryStrategy)
-	if dispatcher == nil {
+
-		mode = "DOHL"
+	s.dispatcher = dispatcher
-	}
+	tr := &http.Transport{
-	errors.LogInfo(context.Background(), "DNS: created ", mode, " client for ", url.String(), ", with h2c ", h2c)
+		MaxIdleConns:        30,
-	s := &DoHNameServer{
+		IdleConnTimeout:     90 * time.Second,
-		cacheController: NewCacheController(mode+"//"+url.Host, disableCache),
+		TLSHandshakeTimeout: 30 * time.Second,
-		dohURL:          url.String(),
+		ForceAttemptHTTP2:   true,
-		clientIP:        clientIP,
+		DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
+			dest, err := net.ParseDestination(network + ":" + addr)
+			if err != nil {
+				return nil, err
+			}
+			link, err := s.dispatcher.Dispatch(toDnsContext(ctx, s.dohURL), dest)
+			select {
+			case <-ctx.Done():
+				return nil, ctx.Err()
+			default:
+
+			}
+			if err != nil {
+				return nil, err
+			}
+
+			cc := common.ChainedClosable{}
+			if cw, ok := link.Writer.(common.Closable); ok {
+				cc = append(cc, cw)
+			}
+			if cr, ok := link.Reader.(common.Closable); ok {
+				cc = append(cc, cr)
+			}
+			return cnc.NewConnection(
+				cnc.ConnectionInputMulti(link.Writer),
+				cnc.ConnectionOutputMulti(link.Reader),
+				cnc.ConnectionOnClose(cc),
+			), nil
+		},
 	}
 	s.httpClient = &http.Client{
-		Transport: &http2.Transport{
+		Timeout:   time.Second * 180,
-			IdleConnTimeout: net.ConnIdleTimeout,
+		Transport: tr,
-			ReadIdleTimeout: net.ChromeH2KeepAlivePeriod,
+	}
-			DialTLSContext: func(ctx context.Context, network, addr string, cfg *tls.Config) (net.Conn, error) {
+
-				dest, err := net.ParseDestination(network + ":" + addr)
+	return s, nil
-				if err != nil {
+}
-					return nil, err
+
-				}
+// NewDoHLocalNameServer creates DOH client object for local resolving
-				var conn net.Conn
+func NewDoHLocalNameServer(url *url.URL, queryStrategy QueryStrategy) *DoHNameServer {
-				if dispatcher != nil {
+	url.Scheme = "https"
-					dnsCtx := toDnsContext(ctx, s.dohURL)
+	s := baseDOHNameServer(url, "DOHL", queryStrategy)
-					if h2c {
+	tr := &http.Transport{
-						dnsCtx = session.ContextWithMitmAlpn11(dnsCtx, false) // for insurance
+		IdleConnTimeout:   90 * time.Second,
-						dnsCtx = session.ContextWithMitmServerName(dnsCtx, url.Hostname())
+		ForceAttemptHTTP2: true,
-					}
+		DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
-					link, err := dispatcher.Dispatch(dnsCtx, dest)
+			dest, err := net.ParseDestination(network + ":" + addr)
-					select {
+			if err != nil {
-					case <-ctx.Done():
+				return nil, err
-						return nil, ctx.Err()
+			}
-					default:
+			conn, err := internet.DialSystem(ctx, dest, nil)
-					}
+			log.Record(&log.AccessMessage{
-					if err != nil {
+				From:   "DNS",
-						return nil, err
+				To:     s.dohURL,
-					}
+				Status: log.AccessAccepted,
-					cc := common.ChainedClosable{}
+				Detour: "local",
-					if cw, ok := link.Writer.(common.Closable); ok {
+			})
-						cc = append(cc, cw)
+			if err != nil {
-					}
+				return nil, err
-					if cr, ok := link.Reader.(common.Closable); ok {
+			}
-						cc = append(cc, cr)
+			return conn, nil
-					}
-					conn = cnc.NewConnection(
-						cnc.ConnectionInputMulti(link.Writer),
-						cnc.ConnectionOutputMulti(link.Reader),
-						cnc.ConnectionOnClose(cc),
-					)
-				} else {
-					log.Record(&log.AccessMessage{
-						From:   "DNS",
-						To:     s.dohURL,
-						Status: log.AccessAccepted,
-						Detour: "local",
-					})
-					conn, err = internet.DialSystem(ctx, dest, nil)
-					if err != nil {
-						return nil, err
-					}
-				}
-				if !h2c {
-					conn = utls.UClient(conn, &utls.Config{ServerName: url.Hostname()}, utls.HelloChrome_Auto)
-					if err := conn.(*utls.UConn).HandshakeContext(ctx); err != nil {
-						return nil, err
-					}
-				}
-				return conn, nil
-			},
 		},
 	}
+	s.httpClient = &http.Client{
+		Timeout:   time.Second * 180,
+		Transport: tr,
+	}
+	errors.LogInfo(context.Background(), "DNS: created Local DOH client for ", url.String())
+	return s
+}
+
+func baseDOHNameServer(url *url.URL, prefix string, queryStrategy QueryStrategy) *DoHNameServer {
+	s := &DoHNameServer{
+		ips:           make(map[string]*record),
+		pub:           pubsub.NewService(),
+		name:          prefix + "//" + url.Host,
+		dohURL:        url.String(),
+		queryStrategy: queryStrategy,
+	}
+	s.cleanup = &task.Periodic{
+		Interval: time.Minute,
+		Execute:  s.Cleanup,
+	}
 	return s
 }
 
 // Name implements Server.
 func (s *DoHNameServer) Name() string {
-	return s.cacheController.name
+	return s.name
+}
+
+// Cleanup clears expired items from cache
+func (s *DoHNameServer) Cleanup() error {
+	now := time.Now()
+	s.Lock()
+	defer s.Unlock()
+
+	if len(s.ips) == 0 {
+		return errors.New("nothing to do. stopping...")
+	}
+
+	for domain, record := range s.ips {
+		if record.A != nil && record.A.Expire.Before(now) {
+			record.A = nil
+		}
+		if record.AAAA != nil && record.AAAA.Expire.Before(now) {
+			record.AAAA = nil
+		}
+
+		if record.A == nil && record.AAAA == nil {
+			errors.LogDebug(context.Background(), s.name, " cleanup ", domain)
+			delete(s.ips, domain)
+		} else {
+			s.ips[domain] = record
+		}
+	}
+
+	if len(s.ips) == 0 {
+		s.ips = make(map[string]*record)
+	}
+
+	return nil
+}
+
+func (s *DoHNameServer) updateIP(req *dnsRequest, ipRec *IPRecord) {
+	elapsed := time.Since(req.start)
+
+	s.Lock()
+	rec, found := s.ips[req.domain]
+	if !found {
+		rec = &record{}
+	}
+	updated := false
+
+	switch req.reqType {
+	case dnsmessage.TypeA:
+		if isNewer(rec.A, ipRec) {
+			rec.A = ipRec
+			updated = true
+		}
+	case dnsmessage.TypeAAAA:
+		addr := make([]net.Address, 0, len(ipRec.IP))
+		for _, ip := range ipRec.IP {
+			if len(ip.IP()) == net.IPv6len {
+				addr = append(addr, ip)
+			}
+		}
+		ipRec.IP = addr
+		if isNewer(rec.AAAA, ipRec) {
+			rec.AAAA = ipRec
+			updated = true
+		}
+	}
+	errors.LogInfo(context.Background(), s.name, " got answer: ", req.domain, " ", req.reqType, " -> ", ipRec.IP, " ", elapsed)
+
+	if updated {
+		s.ips[req.domain] = rec
+	}
+	switch req.reqType {
+	case dnsmessage.TypeA:
+		s.pub.Publish(req.domain+"4", nil)
+	case dnsmessage.TypeAAAA:
+		s.pub.Publish(req.domain+"6", nil)
+	}
+	s.Unlock()
+	common.Must(s.cleanup.Start())
 }
 
 func (s *DoHNameServer) newReqID() uint16 {
-	return 0
+	return uint16(atomic.AddUint32(&s.reqID, 1))
 }
 
-func (s *DoHNameServer) sendQuery(ctx context.Context, noResponseErrCh chan<- error, domain string, option dns_feature.IPOption) {
+func (s *DoHNameServer) sendQuery(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption) {
-	errors.LogInfo(ctx, s.Name(), " querying: ", domain)
+	errors.LogInfo(ctx, s.name, " querying: ", domain)
 
-	if s.Name()+"." == "DOH//"+domain {
+	if s.name+"." == "DOH//"+domain {
-		errors.LogError(ctx, s.Name(), " tries to resolve itself! Use IP or set \"hosts\" instead.")
+		errors.LogError(ctx, s.name, " tries to resolve itself! Use IP or set \"hosts\" instead.")
-		noResponseErrCh <- errors.New("tries to resolve itself!", s.Name())
 		return
 	}
 
-	// As we don't want our traffic pattern looks like DoH, we use Random-Length Padding instead of Block-Length Padding recommended in RFC 8467
+	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(clientIP))
-	// Although DoH server like 1.1.1.1 will pad the response to Block-Length 468, at least it is better than no padding for response at all
-	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(s.clientIP, int(crypto.RandBetween(100, 300))))
 
 	var deadline time.Time
 	if d, ok := ctx.Deadline(); ok {
@@ -167,22 +268,19 @@ func (s *DoHNameServer) sendQuery(ctx context.Context, noResponseErrCh chan<- er
 			b, err := dns.PackMessage(r.msg)
 			if err != nil {
 				errors.LogErrorInner(ctx, err, "failed to pack dns query for ", domain)
-				noResponseErrCh <- err
 				return
 			}
 			resp, err := s.dohHTTPSContext(dnsCtx, b.Bytes())
 			if err != nil {
 				errors.LogErrorInner(ctx, err, "failed to retrieve response for ", domain)
-				noResponseErrCh <- err
 				return
 			}
 			rec, err := parseResponse(resp)
 			if err != nil {
 				errors.LogErrorInner(ctx, err, "failed to handle DOH response for ", domain)
-				noResponseErrCh <- err
 				return
 			}
-			s.cacheController.updateIP(r, rec)
+			s.updateIP(r, rec)
 		}(req)
 	}
 }
@@ -197,8 +295,6 @@ func (s *DoHNameServer) dohHTTPSContext(ctx context.Context, b []byte) ([]byte,
 	req.Header.Add("Accept", "application/dns-message")
 	req.Header.Add("Content-Type", "application/dns-message")
 
-	req.Header.Set("X-Padding", strings.Repeat("X", int(crypto.RandBetween(100, 1000))))
-
 	hc := s.httpClient
 
 	resp, err := hc.Do(req.WithContext(ctx))
@@ -215,50 +311,107 @@ func (s *DoHNameServer) dohHTTPSContext(ctx context.Context, b []byte) ([]byte,
 	return io.ReadAll(resp.Body)
 }
 
-// QueryIP implements Server.
+func (s *DoHNameServer) findIPsForDomain(domain string, option dns_feature.IPOption) ([]net.IP, error) {
-func (s *DoHNameServer) QueryIP(ctx context.Context, domain string, option dns_feature.IPOption) ([]net.IP, uint32, error) { // nolint: dupl
+	s.RLock()
-	fqdn := Fqdn(domain)
+	record, found := s.ips[domain]
-	sub4, sub6 := s.cacheController.registerSubscribers(fqdn, option)
+	s.RUnlock()
-	defer closeSubscribers(sub4, sub6)
 
-	if s.cacheController.disableCache {
+	if !found {
-		errors.LogDebug(ctx, "DNS cache is disabled. Querying IP for ", domain, " at ", s.Name())
+		return nil, errRecordNotFound
+	}
+
+	var err4 error
+	var err6 error
+	var ips []net.Address
+	var ip6 []net.Address
+
+	if option.IPv4Enable {
+		ips, err4 = record.A.getIPs()
+	}
+
+	if option.IPv6Enable {
+		ip6, err6 = record.AAAA.getIPs()
+		ips = append(ips, ip6...)
+	}
+
+	if len(ips) > 0 {
+		return toNetIP(ips)
+	}
+
+	if err4 != nil {
+		return nil, err4
+	}
+
+	if err6 != nil {
+		return nil, err6
+	}
+
+	if (option.IPv4Enable && record.A != nil) || (option.IPv6Enable && record.AAAA != nil) {
+		return nil, dns_feature.ErrEmptyResponse
+	}
+
+	return nil, errRecordNotFound
+}
+
+// QueryIP implements Server.
+func (s *DoHNameServer) QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption, disableCache bool) ([]net.IP, error) { // nolint: dupl
+	fqdn := Fqdn(domain)
+	option = ResolveIpOptionOverride(s.queryStrategy, option)
+	if !option.IPv4Enable && !option.IPv6Enable {
+		return nil, dns_feature.ErrEmptyResponse
+	}
+
+	if disableCache {
+		errors.LogDebug(ctx, "DNS cache is disabled. Querying IP for ", domain, " at ", s.name)
 	} else {
-		ips, ttl, err := s.cacheController.findIPsForDomain(fqdn, option)
+		ips, err := s.findIPsForDomain(fqdn, option)
-		if !go_errors.Is(err, errRecordNotFound) {
+		if err == nil || err == dns_feature.ErrEmptyResponse {
-			errors.LogDebugInner(ctx, err, s.Name(), " cache HIT ", domain, " -> ", ips)
+			errors.LogDebugInner(ctx, err, s.name, " cache HIT ", domain, " -> ", ips)
-			log.Record(&log.DNSLog{Server: s.Name(), Domain: domain, Result: ips, Status: log.DNSCacheHit, Elapsed: 0, Error: err})
+			log.Record(&log.DNSLog{Server: s.name, Domain: domain, Result: ips, Status: log.DNSCacheHit, Elapsed: 0, Error: err})
-			return ips, ttl, err
+			return ips, err
 		}
 	}
 
-	noResponseErrCh := make(chan error, 2)
+	// ipv4 and ipv6 belong to different subscription groups
-	s.sendQuery(ctx, noResponseErrCh, fqdn, option)
+	var sub4, sub6 *pubsub.Subscriber
+	if option.IPv4Enable {
+		sub4 = s.pub.Subscribe(fqdn + "4")
+		defer sub4.Close()
+	}
+	if option.IPv6Enable {
+		sub6 = s.pub.Subscribe(fqdn + "6")
+		defer sub6.Close()
+	}
+	done := make(chan interface{})
+	go func() {
+		if sub4 != nil {
+			select {
+			case <-sub4.Wait():
+			case <-ctx.Done():
+			}
+		}
+		if sub6 != nil {
+			select {
+			case <-sub6.Wait():
+			case <-ctx.Done():
+			}
+		}
+		close(done)
+	}()
+	s.sendQuery(ctx, fqdn, clientIP, option)
 	start := time.Now()
 
-	if sub4 != nil {
+	for {
+		ips, err := s.findIPsForDomain(fqdn, option)
+		if err != errRecordNotFound {
+			log.Record(&log.DNSLog{Server: s.name, Domain: domain, Result: ips, Status: log.DNSQueried, Elapsed: time.Since(start), Error: err})
+			return ips, err
+		}
+
 		select {
 		case <-ctx.Done():
-			return nil, 0, ctx.Err()
+			return nil, ctx.Err()
-		case err := <-noResponseErrCh:
+		case <-done:
-			return nil, 0, err
-		case <-sub4.Wait():
-			sub4.Close()
 		}
 	}
-	if sub6 != nil {
-		select {
-		case <-ctx.Done():
-			return nil, 0, ctx.Err()
-		case err := <-noResponseErrCh:
-			return nil, 0, err
-		case <-sub6.Wait():
-			sub6.Close()
-		}
-	}
-
-	ips, ttl, err := s.cacheController.findIPsForDomain(fqdn, option)
-	log.Record(&log.DNSLog{Server: s.Name(), Domain: domain, Result: ips, Status: log.DNSQueried, Elapsed: time.Since(start), Error: err})
-	return ips, ttl, err
-
 }

app/dns/nameserver_doh_test.go

@@ -17,12 +17,12 @@ func TestDOHNameServer(t *testing.T) {
 	url, err := url.Parse("https+local://1.1.1.1/dns-query")
 	common.Must(err)
 
-	s := NewDoHNameServer(url, nil, false, false, net.IP(nil))
+	s := NewDoHLocalNameServer(url, QueryStrategy_USE_IP)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
-	ips, _, err := s.QueryIP(ctx, "google.com", dns_feature.IPOption{
+	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns_feature.IPOption{
 		IPv4Enable: true,
 		IPv6Enable: true,
-	})
+	}, false)
 	cancel()
 	common.Must(err)
 	if len(ips) == 0 {
@@ -34,12 +34,12 @@ func TestDOHNameServerWithCache(t *testing.T) {
 	url, err := url.Parse("https+local://1.1.1.1/dns-query")
 	common.Must(err)
 
-	s := NewDoHNameServer(url, nil, false, false, net.IP(nil))
+	s := NewDoHLocalNameServer(url, QueryStrategy_USE_IP)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
-	ips, _, err := s.QueryIP(ctx, "google.com", dns_feature.IPOption{
+	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns_feature.IPOption{
 		IPv4Enable: true,
 		IPv6Enable: true,
-	})
+	}, false)
 	cancel()
 	common.Must(err)
 	if len(ips) == 0 {
@@ -47,10 +47,10 @@ func TestDOHNameServerWithCache(t *testing.T) {
 	}
 
 	ctx2, cancel := context.WithTimeout(context.Background(), time.Second*5)
-	ips2, _, err := s.QueryIP(ctx2, "google.com", dns_feature.IPOption{
+	ips2, err := s.QueryIP(ctx2, "google.com", net.IP(nil), dns_feature.IPOption{
 		IPv4Enable: true,
 		IPv6Enable: true,
-	})
+	}, true)
 	cancel()
 	common.Must(err)
 	if r := cmp.Diff(ips2, ips); r != "" {
@@ -62,12 +62,12 @@ func TestDOHNameServerWithIPv4Override(t *testing.T) {
 	url, err := url.Parse("https+local://1.1.1.1/dns-query")
 	common.Must(err)
 
-	s := NewDoHNameServer(url, nil, false, false, net.IP(nil))
+	s := NewDoHLocalNameServer(url, QueryStrategy_USE_IP4)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
-	ips, _, err := s.QueryIP(ctx, "google.com", dns_feature.IPOption{
+	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns_feature.IPOption{
 		IPv4Enable: true,
-		IPv6Enable: false,
+		IPv6Enable: true,
-	})
+	}, false)
 	cancel()
 	common.Must(err)
 	if len(ips) == 0 {
@@ -85,12 +85,12 @@ func TestDOHNameServerWithIPv6Override(t *testing.T) {
 	url, err := url.Parse("https+local://1.1.1.1/dns-query")
 	common.Must(err)
 
-	s := NewDoHNameServer(url, nil, false, false, net.IP(nil))
+	s := NewDoHLocalNameServer(url, QueryStrategy_USE_IP6)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
-	ips, _, err := s.QueryIP(ctx, "google.com", dns_feature.IPOption{
+	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns_feature.IPOption{
-		IPv4Enable: false,
+		IPv4Enable: true,
 		IPv6Enable: true,
-	})
+	}, false)
 	cancel()
 	common.Must(err)
 	if len(ips) == 0 {

app/dns/nameserver_fakedns.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/dns"
 )
 
@@ -12,19 +13,22 @@ type FakeDNSServer struct {
 	fakeDNSEngine dns.FakeDNSEngine
 }
 
-func NewFakeDNSServer(fd dns.FakeDNSEngine) *FakeDNSServer {
+func NewFakeDNSServer() *FakeDNSServer {
-	return &FakeDNSServer{fakeDNSEngine: fd}
+	return &FakeDNSServer{}
 }
 
 func (FakeDNSServer) Name() string {
 	return "FakeDNS"
 }
 
-func (f *FakeDNSServer) QueryIP(ctx context.Context, domain string, opt dns.IPOption) ([]net.IP, uint32, error) {
+func (f *FakeDNSServer) QueryIP(ctx context.Context, domain string, _ net.IP, opt dns.IPOption, _ bool) ([]net.IP, error) {
 	if f.fakeDNSEngine == nil {
-		return nil, 0, errors.New("Unable to locate a fake DNS Engine").AtError()
+		if err := core.RequireFeatures(ctx, func(fd dns.FakeDNSEngine) {
+			f.fakeDNSEngine = fd
+		}); err != nil {
+			return nil, errors.New("Unable to locate a fake DNS Engine").Base(err).AtError()
+		}
 	}
-
 	var ips []net.Address
 	if fkr0, ok := f.fakeDNSEngine.(dns.FakeDNSEngineRev0); ok {
 		ips = fkr0.GetFakeIPForDomain3(domain, opt.IPv4Enable, opt.IPv6Enable)
@@ -34,13 +38,13 @@ func (f *FakeDNSServer) QueryIP(ctx context.Context, domain string, opt dns.IPOp
 
 	netIP, err := toNetIP(ips)
 	if err != nil {
-		return nil, 0, errors.New("Unable to convert IP to net ip").Base(err).AtError()
+		return nil, errors.New("Unable to convert IP to net ip").Base(err).AtError()
 	}
 
 	errors.LogInfo(ctx, f.Name(), " got answer: ", domain, " -> ", ips)
 
 	if len(netIP) > 0 {
-		return netIP, 1, nil // fakeIP ttl is 1
+		return netIP, nil
 	}
-	return nil, 0, dns.ErrEmptyResponse
+	return nil, dns.ErrEmptyResponse
 }

app/dns/nameserver_local.go

@@ -2,6 +2,7 @@ package dns
 
 import (
 	"context"
+	"strings"
 	"time"
 
 	"github.com/xtls/xray-core/common/errors"
@@ -16,11 +17,16 @@ type LocalNameServer struct {
 	client *localdns.Client
 }
 
-// QueryIP implements Server.
+const errEmptyResponse = "No address associated with hostname"
-func (s *LocalNameServer) QueryIP(ctx context.Context, domain string, option dns.IPOption) (ips []net.IP, ttl uint32, err error) {
 
+// QueryIP implements Server.
+func (s *LocalNameServer) QueryIP(ctx context.Context, domain string, _ net.IP, option dns.IPOption, _ bool) (ips []net.IP, err error) {
 	start := time.Now()
-	ips, ttl, err = s.client.LookupIP(domain, option)
+	ips, err = s.client.LookupIP(domain, option)
+
+	if err != nil && strings.HasSuffix(err.Error(), errEmptyResponse) {
+		err = dns.ErrEmptyResponse
+	}
 
 	if len(ips) > 0 {
 		errors.LogInfo(ctx, "Localhost got answer: ", domain, " -> ", ips)
@@ -44,6 +50,6 @@ func NewLocalNameServer() *LocalNameServer {
 }
 
 // NewLocalDNSClient creates localdns client object for directly lookup in system DNS.
-func NewLocalDNSClient(ipOption dns.IPOption) *Client {
+func NewLocalDNSClient() *Client {
-	return &Client{server: NewLocalNameServer(), ipOption: &ipOption}
+	return &Client{server: NewLocalNameServer()}
 }

app/dns/nameserver_local_test.go

@@ -7,17 +7,18 @@ import (
 
 	. "github.com/xtls/xray-core/app/dns"
 	"github.com/xtls/xray-core/common"
+	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/features/dns"
 )
 
 func TestLocalNameServer(t *testing.T) {
 	s := NewLocalNameServer()
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*2)
-	ips, _, err := s.QueryIP(ctx, "google.com", dns.IPOption{
+	ips, err := s.QueryIP(ctx, "google.com", net.IP{}, dns.IPOption{
 		IPv4Enable: true,
 		IPv6Enable: true,
 		FakeEnable: false,
-	})
+	}, false)
 	cancel()
 	common.Must(err)
 	if len(ips) == 0 {

app/dns/nameserver_quic.go

@@ -4,20 +4,24 @@ import (
 	"bytes"
 	"context"
 	"encoding/binary"
-	go_errors "errors"
 	"net/url"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"github.com/quic-go/quic-go"
+	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/log"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/protocol/dns"
 	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/common/signal/pubsub"
+	"github.com/xtls/xray-core/common/task"
 	dns_feature "github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/transport/internet/tls"
+	"golang.org/x/net/dns/dnsmessage"
 	"golang.org/x/net/http2"
 )
 
@@ -30,14 +34,18 @@ const handshakeTimeout = time.Second * 8
 // QUICNameServer implemented DNS over QUIC
 type QUICNameServer struct {
 	sync.RWMutex
-	cacheController *CacheController
+	ips           map[string]*record
-	destination     *net.Destination
+	pub           *pubsub.Service
-	connection      quic.Connection
+	cleanup       *task.Periodic
-	clientIP        net.IP
+	reqID         uint32
+	name          string
+	destination   *net.Destination
+	connection    quic.Connection
+	queryStrategy QueryStrategy
 }
 
 // NewQUICNameServer creates DNS-over-QUIC client object for local resolving
-func NewQUICNameServer(url *url.URL, disableCache bool, clientIP net.IP) (*QUICNameServer, error) {
+func NewQUICNameServer(url *url.URL, queryStrategy QueryStrategy) (*QUICNameServer, error) {
 	errors.LogInfo(context.Background(), "DNS: created Local DNS-over-QUIC client for ", url.String())
 
 	var err error
@@ -51,9 +59,15 @@ func NewQUICNameServer(url *url.URL, disableCache bool, clientIP net.IP) (*QUICN
 	dest := net.UDPDestination(net.ParseAddress(url.Hostname()), port)
 
 	s := &QUICNameServer{
-		cacheController: NewCacheController(url.String(), disableCache),
+		ips:           make(map[string]*record),
-		destination:     &dest,
+		pub:           pubsub.NewService(),
-		clientIP:        clientIP,
+		name:          url.String(),
+		destination:   &dest,
+		queryStrategy: queryStrategy,
+	}
+	s.cleanup = &task.Periodic{
+		Interval: time.Minute,
+		Execute:  s.Cleanup,
 	}
 
 	return s, nil
@@ -61,17 +75,94 @@ func NewQUICNameServer(url *url.URL, disableCache bool, clientIP net.IP) (*QUICN
 
 // Name returns client name
 func (s *QUICNameServer) Name() string {
-	return s.cacheController.name
+	return s.name
+}
+
+// Cleanup clears expired items from cache
+func (s *QUICNameServer) Cleanup() error {
+	now := time.Now()
+	s.Lock()
+	defer s.Unlock()
+
+	if len(s.ips) == 0 {
+		return errors.New("nothing to do. stopping...")
+	}
+
+	for domain, record := range s.ips {
+		if record.A != nil && record.A.Expire.Before(now) {
+			record.A = nil
+		}
+		if record.AAAA != nil && record.AAAA.Expire.Before(now) {
+			record.AAAA = nil
+		}
+
+		if record.A == nil && record.AAAA == nil {
+			errors.LogDebug(context.Background(), s.name, " cleanup ", domain)
+			delete(s.ips, domain)
+		} else {
+			s.ips[domain] = record
+		}
+	}
+
+	if len(s.ips) == 0 {
+		s.ips = make(map[string]*record)
+	}
+
+	return nil
+}
+
+func (s *QUICNameServer) updateIP(req *dnsRequest, ipRec *IPRecord) {
+	elapsed := time.Since(req.start)
+
+	s.Lock()
+	rec, found := s.ips[req.domain]
+	if !found {
+		rec = &record{}
+	}
+	updated := false
+
+	switch req.reqType {
+	case dnsmessage.TypeA:
+		if isNewer(rec.A, ipRec) {
+			rec.A = ipRec
+			updated = true
+		}
+	case dnsmessage.TypeAAAA:
+		addr := make([]net.Address, 0)
+		for _, ip := range ipRec.IP {
+			if len(ip.IP()) == net.IPv6len {
+				addr = append(addr, ip)
+			}
+		}
+		ipRec.IP = addr
+		if isNewer(rec.AAAA, ipRec) {
+			rec.AAAA = ipRec
+			updated = true
+		}
+	}
+	errors.LogInfo(context.Background(), s.name, " got answer: ", req.domain, " ", req.reqType, " -> ", ipRec.IP, " ", elapsed)
+
+	if updated {
+		s.ips[req.domain] = rec
+	}
+	switch req.reqType {
+	case dnsmessage.TypeA:
+		s.pub.Publish(req.domain+"4", nil)
+	case dnsmessage.TypeAAAA:
+		s.pub.Publish(req.domain+"6", nil)
+	}
+	s.Unlock()
+	common.Must(s.cleanup.Start())
 }
 
 func (s *QUICNameServer) newReqID() uint16 {
-	return 0
+	return uint16(atomic.AddUint32(&s.reqID, 1))
 }
 
-func (s *QUICNameServer) sendQuery(ctx context.Context, noResponseErrCh chan<- error, domain string, option dns_feature.IPOption) {
+func (s *QUICNameServer) sendQuery(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption) {
-	errors.LogInfo(ctx, s.Name(), " querying: ", domain)
+	errors.LogInfo(ctx, s.name, " querying: ", domain)
 
-	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(s.clientIP, 0))
+	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(clientIP))
 
 	var deadline time.Time
 	if d, ok := ctx.Deadline(); ok {
@@ -103,36 +194,23 @@ func (s *QUICNameServer) sendQuery(ctx context.Context, noResponseErrCh chan<- e
 			b, err := dns.PackMessage(r.msg)
 			if err != nil {
 				errors.LogErrorInner(ctx, err, "failed to pack dns query")
-				noResponseErrCh <- err
 				return
 			}
 
 			dnsReqBuf := buf.New()
-			err = binary.Write(dnsReqBuf, binary.BigEndian, uint16(b.Len()))
+			binary.Write(dnsReqBuf, binary.BigEndian, uint16(b.Len()))
-			if err != nil {
+			dnsReqBuf.Write(b.Bytes())
-				errors.LogErrorInner(ctx, err, "binary write failed")
-				noResponseErrCh <- err
-				return
-			}
-			_, err = dnsReqBuf.Write(b.Bytes())
-			if err != nil {
-				errors.LogErrorInner(ctx, err, "buffer write failed")
-				noResponseErrCh <- err
-				return
-			}
 			b.Release()
 
 			conn, err := s.openStream(dnsCtx)
 			if err != nil {
 				errors.LogErrorInner(ctx, err, "failed to open quic connection")
-				noResponseErrCh <- err
 				return
 			}
 
 			_, err = conn.Write(dnsReqBuf.Bytes())
 			if err != nil {
 				errors.LogErrorInner(ctx, err, "failed to send query")
-				noResponseErrCh <- err
 				return
 			}
 
@@ -143,81 +221,134 @@ func (s *QUICNameServer) sendQuery(ctx context.Context, noResponseErrCh chan<- e
 			n, err := respBuf.ReadFullFrom(conn, 2)
 			if err != nil && n == 0 {
 				errors.LogErrorInner(ctx, err, "failed to read response length")
-				noResponseErrCh <- err
 				return
 			}
 			var length int16
 			err = binary.Read(bytes.NewReader(respBuf.Bytes()), binary.BigEndian, &length)
 			if err != nil {
 				errors.LogErrorInner(ctx, err, "failed to parse response length")
-				noResponseErrCh <- err
 				return
 			}
 			respBuf.Clear()
 			n, err = respBuf.ReadFullFrom(conn, int32(length))
 			if err != nil && n == 0 {
 				errors.LogErrorInner(ctx, err, "failed to read response length")
-				noResponseErrCh <- err
 				return
 			}
 
 			rec, err := parseResponse(respBuf.Bytes())
 			if err != nil {
 				errors.LogErrorInner(ctx, err, "failed to handle response")
-				noResponseErrCh <- err
 				return
 			}
-			s.cacheController.updateIP(r, rec)
+			s.updateIP(r, rec)
 		}(req)
 	}
 }
 
-// QueryIP is called from dns.Server->queryIPTimeout
+func (s *QUICNameServer) findIPsForDomain(domain string, option dns_feature.IPOption) ([]net.IP, error) {
-func (s *QUICNameServer) QueryIP(ctx context.Context, domain string, option dns_feature.IPOption) ([]net.IP, uint32, error) {
+	s.RLock()
-	fqdn := Fqdn(domain)
+	record, found := s.ips[domain]
-	sub4, sub6 := s.cacheController.registerSubscribers(fqdn, option)
+	s.RUnlock()
-	defer closeSubscribers(sub4, sub6)
 
-	if s.cacheController.disableCache {
+	if !found {
-		errors.LogDebug(ctx, "DNS cache is disabled. Querying IP for ", domain, " at ", s.Name())
+		return nil, errRecordNotFound
+	}
+
+	var err4 error
+	var err6 error
+	var ips []net.Address
+	var ip6 []net.Address
+
+	if option.IPv4Enable {
+		ips, err4 = record.A.getIPs()
+	}
+
+	if option.IPv6Enable {
+		ip6, err6 = record.AAAA.getIPs()
+		ips = append(ips, ip6...)
+	}
+
+	if len(ips) > 0 {
+		return toNetIP(ips)
+	}
+
+	if err4 != nil {
+		return nil, err4
+	}
+
+	if err6 != nil {
+		return nil, err6
+	}
+
+	if (option.IPv4Enable && record.A != nil) || (option.IPv6Enable && record.AAAA != nil) {
+		return nil, dns_feature.ErrEmptyResponse
+	}
+
+	return nil, errRecordNotFound
+}
+
+// QueryIP is called from dns.Server->queryIPTimeout
+func (s *QUICNameServer) QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption, disableCache bool) ([]net.IP, error) {
+	fqdn := Fqdn(domain)
+	option = ResolveIpOptionOverride(s.queryStrategy, option)
+	if !option.IPv4Enable && !option.IPv6Enable {
+		return nil, dns_feature.ErrEmptyResponse
+	}
+
+	if disableCache {
+		errors.LogDebug(ctx, "DNS cache is disabled. Querying IP for ", domain, " at ", s.name)
 	} else {
-		ips, ttl, err := s.cacheController.findIPsForDomain(fqdn, option)
+		ips, err := s.findIPsForDomain(fqdn, option)
-		if !go_errors.Is(err, errRecordNotFound) {
+		if err == nil || err == dns_feature.ErrEmptyResponse {
-			errors.LogDebugInner(ctx, err, s.Name(), " cache HIT ", domain, " -> ", ips)
+			errors.LogDebugInner(ctx, err, s.name, " cache HIT ", domain, " -> ", ips)
-			log.Record(&log.DNSLog{Server: s.Name(), Domain: domain, Result: ips, Status: log.DNSCacheHit, Elapsed: 0, Error: err})
+			log.Record(&log.DNSLog{Server: s.name, Domain: domain, Result: ips, Status: log.DNSCacheHit, Elapsed: 0, Error: err})
-			return ips, ttl, err
+			return ips, err
 		}
 	}
 
-	noResponseErrCh := make(chan error, 2)
+	// ipv4 and ipv6 belong to different subscription groups
-	s.sendQuery(ctx, noResponseErrCh, fqdn, option)
+	var sub4, sub6 *pubsub.Subscriber
+	if option.IPv4Enable {
+		sub4 = s.pub.Subscribe(fqdn + "4")
+		defer sub4.Close()
+	}
+	if option.IPv6Enable {
+		sub6 = s.pub.Subscribe(fqdn + "6")
+		defer sub6.Close()
+	}
+	done := make(chan interface{})
+	go func() {
+		if sub4 != nil {
+			select {
+			case <-sub4.Wait():
+			case <-ctx.Done():
+			}
+		}
+		if sub6 != nil {
+			select {
+			case <-sub6.Wait():
+			case <-ctx.Done():
+			}
+		}
+		close(done)
+	}()
+	s.sendQuery(ctx, fqdn, clientIP, option)
 	start := time.Now()
 
-	if sub4 != nil {
+	for {
+		ips, err := s.findIPsForDomain(fqdn, option)
+		if err != errRecordNotFound {
+			log.Record(&log.DNSLog{Server: s.name, Domain: domain, Result: ips, Status: log.DNSQueried, Elapsed: time.Since(start), Error: err})
+			return ips, err
+		}
+
 		select {
 		case <-ctx.Done():
-			return nil, 0, ctx.Err()
+			return nil, ctx.Err()
-		case err := <-noResponseErrCh:
+		case <-done:
-			return nil, 0, err
-		case <-sub4.Wait():
-			sub4.Close()
 		}
 	}
-	if sub6 != nil {
-		select {
-		case <-ctx.Done():
-			return nil, 0, ctx.Err()
-		case err := <-noResponseErrCh:
-			return nil, 0, err
-		case <-sub6.Wait():
-			sub6.Close()
-		}
-	}
-
-	ips, ttl, err := s.cacheController.findIPsForDomain(fqdn, option)
-	log.Record(&log.DNSLog{Server: s.Name(), Domain: domain, Result: ips, Status: log.DNSQueried, Elapsed: time.Since(start), Error: err})
-	return ips, ttl, err
-
 }
 
 func isActive(s quic.Connection) bool {

app/dns/nameserver_quic_test.go

@@ -16,23 +16,24 @@ import (
 func TestQUICNameServer(t *testing.T) {
 	url, err := url.Parse("quic://dns.adguard-dns.com")
 	common.Must(err)
-	s, err := NewQUICNameServer(url, false, net.IP(nil))
+	s, err := NewQUICNameServer(url, QueryStrategy_USE_IP)
 	common.Must(err)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*2)
-	ips, _, err := s.QueryIP(ctx, "google.com", dns.IPOption{
+	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns.IPOption{
 		IPv4Enable: true,
 		IPv6Enable: true,
-	})
+	}, false)
 	cancel()
 	common.Must(err)
 	if len(ips) == 0 {
 		t.Error("expect some ips, but got 0")
 	}
+
 	ctx2, cancel := context.WithTimeout(context.Background(), time.Second*5)
-	ips2, _, err := s.QueryIP(ctx2, "google.com", dns.IPOption{
+	ips2, err := s.QueryIP(ctx2, "google.com", net.IP(nil), dns.IPOption{
 		IPv4Enable: true,
 		IPv6Enable: true,
-	})
+	}, true)
 	cancel()
 	common.Must(err)
 	if r := cmp.Diff(ips2, ips); r != "" {
@@ -43,13 +44,13 @@ func TestQUICNameServer(t *testing.T) {
 func TestQUICNameServerWithIPv4Override(t *testing.T) {
 	url, err := url.Parse("quic://dns.adguard-dns.com")
 	common.Must(err)
-	s, err := NewQUICNameServer(url, false, net.IP(nil))
+	s, err := NewQUICNameServer(url, QueryStrategy_USE_IP4)
 	common.Must(err)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*2)
-	ips, _, err := s.QueryIP(ctx, "google.com", dns.IPOption{
+	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns.IPOption{
 		IPv4Enable: true,
-		IPv6Enable: false,
+		IPv6Enable: true,
-	})
+	}, false)
 	cancel()
 	common.Must(err)
 	if len(ips) == 0 {
@@ -66,13 +67,13 @@ func TestQUICNameServerWithIPv4Override(t *testing.T) {
 func TestQUICNameServerWithIPv6Override(t *testing.T) {
 	url, err := url.Parse("quic://dns.adguard-dns.com")
 	common.Must(err)
-	s, err := NewQUICNameServer(url, false, net.IP(nil))
+	s, err := NewQUICNameServer(url, QueryStrategy_USE_IP6)
 	common.Must(err)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*2)
-	ips, _, err := s.QueryIP(ctx, "google.com", dns.IPOption{
+	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns.IPOption{
-		IPv4Enable: false,
+		IPv4Enable: true,
 		IPv6Enable: true,
-	})
+	}, false)
 	cancel()
 	common.Must(err)
 	if len(ips) == 0 {

app/dns/nameserver_tcp.go

@@ -4,11 +4,12 @@ import (
 	"bytes"
 	"context"
 	"encoding/binary"
-	go_errors "errors"
 	"net/url"
+	"sync"
 	"sync/atomic"
 	"time"
 
+	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/log"
@@ -16,28 +17,34 @@ import (
 	"github.com/xtls/xray-core/common/net/cnc"
 	"github.com/xtls/xray-core/common/protocol/dns"
 	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/common/signal/pubsub"
+	"github.com/xtls/xray-core/common/task"
 	dns_feature "github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/transport/internet"
+	"golang.org/x/net/dns/dnsmessage"
 )
 
 // TCPNameServer implemented DNS over TCP (RFC7766).
 type TCPNameServer struct {
-	cacheController *CacheController
+	sync.RWMutex
-	destination     *net.Destination
+	name          string
-	reqID           uint32
+	destination   *net.Destination
-	dial            func(context.Context) (net.Conn, error)
+	ips           map[string]*record
-	clientIP        net.IP
+	pub           *pubsub.Service
+	cleanup       *task.Periodic
+	reqID         uint32
+	dial          func(context.Context) (net.Conn, error)
+	queryStrategy QueryStrategy
 }
 
 // NewTCPNameServer creates DNS over TCP server object for remote resolving.
 func NewTCPNameServer(
 	url *url.URL,
 	dispatcher routing.Dispatcher,
-	disableCache bool,
+	queryStrategy QueryStrategy,
-	clientIP net.IP,
 ) (*TCPNameServer, error) {
-	s, err := baseTCPNameServer(url, "TCP", disableCache, clientIP)
+	s, err := baseTCPNameServer(url, "TCP", queryStrategy)
 	if err != nil {
 		return nil, err
 	}
@@ -58,8 +65,8 @@ func NewTCPNameServer(
 }
 
 // NewTCPLocalNameServer creates DNS over TCP client object for local resolving
-func NewTCPLocalNameServer(url *url.URL, disableCache bool, clientIP net.IP) (*TCPNameServer, error) {
+func NewTCPLocalNameServer(url *url.URL, queryStrategy QueryStrategy) (*TCPNameServer, error) {
-	s, err := baseTCPNameServer(url, "TCPL", disableCache, clientIP)
+	s, err := baseTCPNameServer(url, "TCPL", queryStrategy)
 	if err != nil {
 		return nil, err
 	}
@@ -71,7 +78,7 @@ func NewTCPLocalNameServer(url *url.URL, disableCache bool, clientIP net.IP) (*T
 	return s, nil
 }
 
-func baseTCPNameServer(url *url.URL, prefix string, disableCache bool, clientIP net.IP) (*TCPNameServer, error) {
+func baseTCPNameServer(url *url.URL, prefix string, queryStrategy QueryStrategy) (*TCPNameServer, error) {
 	port := net.Port(53)
 	if url.Port() != "" {
 		var err error
@@ -82,9 +89,15 @@ func baseTCPNameServer(url *url.URL, prefix string, disableCache bool, clientIP
 	dest := net.TCPDestination(net.ParseAddress(url.Hostname()), port)
 
 	s := &TCPNameServer{
-		cacheController: NewCacheController(prefix+"//"+dest.NetAddr(), disableCache),
+		destination:   &dest,
-		destination:     &dest,
+		ips:           make(map[string]*record),
-		clientIP:        clientIP,
+		pub:           pubsub.NewService(),
+		name:          prefix + "//" + dest.NetAddr(),
+		queryStrategy: queryStrategy,
+	}
+	s.cleanup = &task.Periodic{
+		Interval: time.Minute,
+		Execute:  s.Cleanup,
 	}
 
 	return s, nil
@@ -92,17 +105,94 @@ func baseTCPNameServer(url *url.URL, prefix string, disableCache bool, clientIP
 
 // Name implements Server.
 func (s *TCPNameServer) Name() string {
-	return s.cacheController.name
+	return s.name
+}
+
+// Cleanup clears expired items from cache
+func (s *TCPNameServer) Cleanup() error {
+	now := time.Now()
+	s.Lock()
+	defer s.Unlock()
+
+	if len(s.ips) == 0 {
+		return errors.New("nothing to do. stopping...")
+	}
+
+	for domain, record := range s.ips {
+		if record.A != nil && record.A.Expire.Before(now) {
+			record.A = nil
+		}
+		if record.AAAA != nil && record.AAAA.Expire.Before(now) {
+			record.AAAA = nil
+		}
+
+		if record.A == nil && record.AAAA == nil {
+			errors.LogDebug(context.Background(), s.name, " cleanup ", domain)
+			delete(s.ips, domain)
+		} else {
+			s.ips[domain] = record
+		}
+	}
+
+	if len(s.ips) == 0 {
+		s.ips = make(map[string]*record)
+	}
+
+	return nil
+}
+
+func (s *TCPNameServer) updateIP(req *dnsRequest, ipRec *IPRecord) {
+	elapsed := time.Since(req.start)
+
+	s.Lock()
+	rec, found := s.ips[req.domain]
+	if !found {
+		rec = &record{}
+	}
+	updated := false
+
+	switch req.reqType {
+	case dnsmessage.TypeA:
+		if isNewer(rec.A, ipRec) {
+			rec.A = ipRec
+			updated = true
+		}
+	case dnsmessage.TypeAAAA:
+		addr := make([]net.Address, 0)
+		for _, ip := range ipRec.IP {
+			if len(ip.IP()) == net.IPv6len {
+				addr = append(addr, ip)
+			}
+		}
+		ipRec.IP = addr
+		if isNewer(rec.AAAA, ipRec) {
+			rec.AAAA = ipRec
+			updated = true
+		}
+	}
+	errors.LogInfo(context.Background(), s.name, " got answer: ", req.domain, " ", req.reqType, " -> ", ipRec.IP, " ", elapsed)
+
+	if updated {
+		s.ips[req.domain] = rec
+	}
+	switch req.reqType {
+	case dnsmessage.TypeA:
+		s.pub.Publish(req.domain+"4", nil)
+	case dnsmessage.TypeAAAA:
+		s.pub.Publish(req.domain+"6", nil)
+	}
+	s.Unlock()
+	common.Must(s.cleanup.Start())
 }
 
 func (s *TCPNameServer) newReqID() uint16 {
 	return uint16(atomic.AddUint32(&s.reqID, 1))
 }
 
-func (s *TCPNameServer) sendQuery(ctx context.Context, noResponseErrCh chan<- error, domain string, option dns_feature.IPOption) {
+func (s *TCPNameServer) sendQuery(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption) {
-	errors.LogDebug(ctx, s.Name(), " querying DNS for: ", domain)
+	errors.LogDebug(ctx, s.name, " querying DNS for: ", domain)
 
-	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(s.clientIP, 0))
+	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(clientIP))
 
 	var deadline time.Time
 	if d, ok := ctx.Deadline(); ok {
@@ -131,36 +221,23 @@ func (s *TCPNameServer) sendQuery(ctx context.Context, noResponseErrCh chan<- er
 			b, err := dns.PackMessage(r.msg)
 			if err != nil {
 				errors.LogErrorInner(ctx, err, "failed to pack dns query")
-				noResponseErrCh <- err
 				return
 			}
 
 			conn, err := s.dial(dnsCtx)
 			if err != nil {
 				errors.LogErrorInner(ctx, err, "failed to dial namesever")
-				noResponseErrCh <- err
 				return
 			}
 			defer conn.Close()
 			dnsReqBuf := buf.New()
-			err = binary.Write(dnsReqBuf, binary.BigEndian, uint16(b.Len()))
+			binary.Write(dnsReqBuf, binary.BigEndian, uint16(b.Len()))
-			if err != nil {
+			dnsReqBuf.Write(b.Bytes())
-				errors.LogErrorInner(ctx, err, "binary write failed")
-				noResponseErrCh <- err
-				return
-			}
-			_, err = dnsReqBuf.Write(b.Bytes())
-			if err != nil {
-				errors.LogErrorInner(ctx, err, "buffer write failed")
-				noResponseErrCh <- err
-				return
-			}
 			b.Release()
 
 			_, err = conn.Write(dnsReqBuf.Bytes())
 			if err != nil {
 				errors.LogErrorInner(ctx, err, "failed to send query")
-				noResponseErrCh <- err
 				return
 			}
 			dnsReqBuf.Release()
@@ -170,80 +247,129 @@ func (s *TCPNameServer) sendQuery(ctx context.Context, noResponseErrCh chan<- er
 			n, err := respBuf.ReadFullFrom(conn, 2)
 			if err != nil && n == 0 {
 				errors.LogErrorInner(ctx, err, "failed to read response length")
-				noResponseErrCh <- err
 				return
 			}
 			var length int16
 			err = binary.Read(bytes.NewReader(respBuf.Bytes()), binary.BigEndian, &length)
 			if err != nil {
 				errors.LogErrorInner(ctx, err, "failed to parse response length")
-				noResponseErrCh <- err
 				return
 			}
 			respBuf.Clear()
 			n, err = respBuf.ReadFullFrom(conn, int32(length))
 			if err != nil && n == 0 {
 				errors.LogErrorInner(ctx, err, "failed to read response length")
-				noResponseErrCh <- err
 				return
 			}
 
 			rec, err := parseResponse(respBuf.Bytes())
 			if err != nil {
 				errors.LogErrorInner(ctx, err, "failed to parse DNS over TCP response")
-				noResponseErrCh <- err
 				return
 			}
 
-			s.cacheController.updateIP(r, rec)
+			s.updateIP(r, rec)
 		}(req)
 	}
 }
 
-// QueryIP implements Server.
+func (s *TCPNameServer) findIPsForDomain(domain string, option dns_feature.IPOption) ([]net.IP, error) {
-func (s *TCPNameServer) QueryIP(ctx context.Context, domain string, option dns_feature.IPOption) ([]net.IP, uint32, error) {
+	s.RLock()
-	fqdn := Fqdn(domain)
+	record, found := s.ips[domain]
-	sub4, sub6 := s.cacheController.registerSubscribers(fqdn, option)
+	s.RUnlock()
-	defer closeSubscribers(sub4, sub6)
 
-	if s.cacheController.disableCache {
+	if !found {
-		errors.LogDebug(ctx, "DNS cache is disabled. Querying IP for ", domain, " at ", s.Name())
+		return nil, errRecordNotFound
+	}
+
+	var err4 error
+	var err6 error
+	var ips []net.Address
+	var ip6 []net.Address
+
+	if option.IPv4Enable {
+		ips, err4 = record.A.getIPs()
+	}
+
+	if option.IPv6Enable {
+		ip6, err6 = record.AAAA.getIPs()
+		ips = append(ips, ip6...)
+	}
+
+	if len(ips) > 0 {
+		return toNetIP(ips)
+	}
+
+	if err4 != nil {
+		return nil, err4
+	}
+
+	if err6 != nil {
+		return nil, err6
+	}
+
+	return nil, dns_feature.ErrEmptyResponse
+}
+
+// QueryIP implements Server.
+func (s *TCPNameServer) QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption, disableCache bool) ([]net.IP, error) {
+	fqdn := Fqdn(domain)
+	option = ResolveIpOptionOverride(s.queryStrategy, option)
+	if !option.IPv4Enable && !option.IPv6Enable {
+		return nil, dns_feature.ErrEmptyResponse
+	}
+
+	if disableCache {
+		errors.LogDebug(ctx, "DNS cache is disabled. Querying IP for ", domain, " at ", s.name)
 	} else {
-		ips, ttl, err := s.cacheController.findIPsForDomain(fqdn, option)
+		ips, err := s.findIPsForDomain(fqdn, option)
-		if !go_errors.Is(err, errRecordNotFound) {
+		if err == nil || err == dns_feature.ErrEmptyResponse {
-			errors.LogDebugInner(ctx, err, s.Name(), " cache HIT ", domain, " -> ", ips)
+			errors.LogDebugInner(ctx, err, s.name, " cache HIT ", domain, " -> ", ips)
-			log.Record(&log.DNSLog{Server: s.Name(), Domain: domain, Result: ips, Status: log.DNSCacheHit, Elapsed: 0, Error: err})
+			log.Record(&log.DNSLog{Server: s.name, Domain: domain, Result: ips, Status: log.DNSCacheHit, Elapsed: 0, Error: err})
-			return ips, ttl, err
+			return ips, err
 		}
 	}
 
-	noResponseErrCh := make(chan error, 2)
+	// ipv4 and ipv6 belong to different subscription groups
-	s.sendQuery(ctx, noResponseErrCh, fqdn, option)
+	var sub4, sub6 *pubsub.Subscriber
+	if option.IPv4Enable {
+		sub4 = s.pub.Subscribe(fqdn + "4")
+		defer sub4.Close()
+	}
+	if option.IPv6Enable {
+		sub6 = s.pub.Subscribe(fqdn + "6")
+		defer sub6.Close()
+	}
+	done := make(chan interface{})
+	go func() {
+		if sub4 != nil {
+			select {
+			case <-sub4.Wait():
+			case <-ctx.Done():
+			}
+		}
+		if sub6 != nil {
+			select {
+			case <-sub6.Wait():
+			case <-ctx.Done():
+			}
+		}
+		close(done)
+	}()
+	s.sendQuery(ctx, fqdn, clientIP, option)
 	start := time.Now()
 
-	if sub4 != nil {
+	for {
+		ips, err := s.findIPsForDomain(fqdn, option)
+		if err != errRecordNotFound {
+			log.Record(&log.DNSLog{Server: s.name, Domain: domain, Result: ips, Status: log.DNSQueried, Elapsed: time.Since(start), Error: err})
+			return ips, err
+		}
+
 		select {
 		case <-ctx.Done():
-			return nil, 0, ctx.Err()
+			return nil, ctx.Err()
-		case err := <-noResponseErrCh:
+		case <-done:
-			return nil, 0, err
-		case <-sub4.Wait():
-			sub4.Close()
 		}
 	}
-	if sub6 != nil {
-		select {
-		case <-ctx.Done():
-			return nil, 0, ctx.Err()
-		case err := <-noResponseErrCh:
-			return nil, 0, err
-		case <-sub6.Wait():
-			sub6.Close()
-		}
-	}
-
-	ips, ttl, err := s.cacheController.findIPsForDomain(fqdn, option)
-	log.Record(&log.DNSLog{Server: s.Name(), Domain: domain, Result: ips, Status: log.DNSQueried, Elapsed: time.Since(start), Error: err})
-	return ips, ttl, err
-
 }

app/dns/nameserver_tcp_test.go

@@ -16,13 +16,13 @@ import (
 func TestTCPLocalNameServer(t *testing.T) {
 	url, err := url.Parse("tcp+local://8.8.8.8")
 	common.Must(err)
-	s, err := NewTCPLocalNameServer(url, false, net.IP(nil))
+	s, err := NewTCPLocalNameServer(url, QueryStrategy_USE_IP)
 	common.Must(err)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
-	ips, _, err := s.QueryIP(ctx, "google.com", dns_feature.IPOption{
+	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns_feature.IPOption{
 		IPv4Enable: true,
 		IPv6Enable: true,
-	})
+	}, false)
 	cancel()
 	common.Must(err)
 	if len(ips) == 0 {
@@ -33,13 +33,13 @@ func TestTCPLocalNameServer(t *testing.T) {
 func TestTCPLocalNameServerWithCache(t *testing.T) {
 	url, err := url.Parse("tcp+local://8.8.8.8")
 	common.Must(err)
-	s, err := NewTCPLocalNameServer(url, false, net.IP(nil))
+	s, err := NewTCPLocalNameServer(url, QueryStrategy_USE_IP)
 	common.Must(err)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
-	ips, _, err := s.QueryIP(ctx, "google.com", dns_feature.IPOption{
+	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns_feature.IPOption{
 		IPv4Enable: true,
 		IPv6Enable: true,
-	})
+	}, false)
 	cancel()
 	common.Must(err)
 	if len(ips) == 0 {
@@ -47,10 +47,10 @@ func TestTCPLocalNameServerWithCache(t *testing.T) {
 	}
 
 	ctx2, cancel := context.WithTimeout(context.Background(), time.Second*5)
-	ips2, _, err := s.QueryIP(ctx2, "google.com", dns_feature.IPOption{
+	ips2, err := s.QueryIP(ctx2, "google.com", net.IP(nil), dns_feature.IPOption{
 		IPv4Enable: true,
 		IPv6Enable: true,
-	})
+	}, true)
 	cancel()
 	common.Must(err)
 	if r := cmp.Diff(ips2, ips); r != "" {
@@ -61,13 +61,13 @@ func TestTCPLocalNameServerWithCache(t *testing.T) {
 func TestTCPLocalNameServerWithIPv4Override(t *testing.T) {
 	url, err := url.Parse("tcp+local://8.8.8.8")
 	common.Must(err)
-	s, err := NewTCPLocalNameServer(url, false, net.IP(nil))
+	s, err := NewTCPLocalNameServer(url, QueryStrategy_USE_IP4)
 	common.Must(err)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
-	ips, _, err := s.QueryIP(ctx, "google.com", dns_feature.IPOption{
+	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns_feature.IPOption{
 		IPv4Enable: true,
-		IPv6Enable: false,
+		IPv6Enable: true,
-	})
+	}, false)
 	cancel()
 	common.Must(err)
 
@@ -85,13 +85,13 @@ func TestTCPLocalNameServerWithIPv4Override(t *testing.T) {
 func TestTCPLocalNameServerWithIPv6Override(t *testing.T) {
 	url, err := url.Parse("tcp+local://8.8.8.8")
 	common.Must(err)
-	s, err := NewTCPLocalNameServer(url, false, net.IP(nil))
+	s, err := NewTCPLocalNameServer(url, QueryStrategy_USE_IP6)
 	common.Must(err)
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
-	ips, _, err := s.QueryIP(ctx, "google.com", dns_feature.IPOption{
+	ips, err := s.QueryIP(ctx, "google.com", net.IP(nil), dns_feature.IPOption{
-		IPv4Enable: false,
+		IPv4Enable: true,
 		IPv6Enable: true,
-	})
+	}, false)
 	cancel()
 	common.Must(err)
 

app/dns/nameserver_udp.go

@@ -2,7 +2,6 @@ package dns
 
 import (
 	"context"
-	go_errors "errors"
 	"strings"
 	"sync"
 	"sync/atomic"
@@ -14,6 +13,7 @@ import (
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/protocol/dns"
 	udp_proto "github.com/xtls/xray-core/common/protocol/udp"
+	"github.com/xtls/xray-core/common/signal/pubsub"
 	"github.com/xtls/xray-core/common/task"
 	dns_feature "github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/routing"
@@ -24,36 +24,35 @@ import (
 // ClassicNameServer implemented traditional UDP DNS.
 type ClassicNameServer struct {
 	sync.RWMutex
-	cacheController *CacheController
+	name          string
-	address         *net.Destination
+	address       *net.Destination
-	requests        map[uint16]*udpDnsRequest
+	ips           map[string]*record
-	udpServer       *udp.Dispatcher
+	requests      map[uint16]*dnsRequest
-	requestsCleanup *task.Periodic
+	pub           *pubsub.Service
-	reqID           uint32
+	udpServer     *udp.Dispatcher
-	clientIP        net.IP
+	cleanup       *task.Periodic
-}
+	reqID         uint32
-
+	queryStrategy QueryStrategy
-type udpDnsRequest struct {
-	dnsRequest
-	ctx context.Context
 }
 
 // NewClassicNameServer creates udp server object for remote resolving.
-func NewClassicNameServer(address net.Destination, dispatcher routing.Dispatcher, disableCache bool, clientIP net.IP) *ClassicNameServer {
+func NewClassicNameServer(address net.Destination, dispatcher routing.Dispatcher, queryStrategy QueryStrategy) *ClassicNameServer {
 	// default to 53 if unspecific
 	if address.Port == 0 {
 		address.Port = net.Port(53)
 	}
 
 	s := &ClassicNameServer{
-		cacheController: NewCacheController(strings.ToUpper(address.String()), disableCache),
+		address:       &address,
-		address:         &address,
+		ips:           make(map[string]*record),
-		requests:        make(map[uint16]*udpDnsRequest),
+		requests:      make(map[uint16]*dnsRequest),
-		clientIP:        clientIP,
+		pub:           pubsub.NewService(),
+		name:          strings.ToUpper(address.String()),
+		queryStrategy: queryStrategy,
 	}
-	s.requestsCleanup = &task.Periodic{
+	s.cleanup = &task.Periodic{
 		Interval: time.Minute,
-		Execute:  s.RequestsCleanup,
+		Execute:  s.Cleanup,
 	}
 	s.udpServer = udp.NewDispatcher(dispatcher, s.HandleResponse)
 	errors.LogInfo(context.Background(), "DNS: created UDP client initialized for ", address.NetAddr())
@@ -62,17 +61,37 @@ func NewClassicNameServer(address net.Destination, dispatcher routing.Dispatcher
 
 // Name implements Server.
 func (s *ClassicNameServer) Name() string {
-	return s.cacheController.name
+	return s.name
 }
 
-// RequestsCleanup clears expired items from cache
+// Cleanup clears expired items from cache
-func (s *ClassicNameServer) RequestsCleanup() error {
+func (s *ClassicNameServer) Cleanup() error {
 	now := time.Now()
 	s.Lock()
 	defer s.Unlock()
 
-	if len(s.requests) == 0 {
+	if len(s.ips) == 0 && len(s.requests) == 0 {
-		return errors.New(s.Name(), " nothing to do. stopping...")
+		return errors.New(s.name, " nothing to do. stopping...")
+	}
+
+	for domain, record := range s.ips {
+		if record.A != nil && record.A.Expire.Before(now) {
+			record.A = nil
+		}
+		if record.AAAA != nil && record.AAAA.Expire.Before(now) {
+			record.AAAA = nil
+		}
+
+		if record.A == nil && record.AAAA == nil {
+			errors.LogDebug(context.Background(), s.name, " cleanup ", domain)
+			delete(s.ips, domain)
+		} else {
+			s.ips[domain] = record
+		}
+	}
+
+	if len(s.ips) == 0 {
+		s.ips = make(map[string]*record)
 	}
 
 	for id, req := range s.requests {
@@ -82,7 +101,7 @@ func (s *ClassicNameServer) RequestsCleanup() error {
 	}
 
 	if len(s.requests) == 0 {
-		s.requests = make(map[uint16]*udpDnsRequest)
+		s.requests = make(map[uint16]*dnsRequest)
 	}
 
 	return nil
@@ -92,7 +111,7 @@ func (s *ClassicNameServer) RequestsCleanup() error {
 func (s *ClassicNameServer) HandleResponse(ctx context.Context, packet *udp_proto.Packet) {
 	ipRec, err := parseResponse(packet.Payload.Bytes())
 	if err != nil {
-		errors.LogError(ctx, s.Name(), " fail to parse responded DNS udp")
+		errors.LogError(ctx, s.name, " fail to parse responded DNS udp")
 		return
 	}
 
@@ -105,107 +124,179 @@ func (s *ClassicNameServer) HandleResponse(ctx context.Context, packet *udp_prot
 	}
 	s.Unlock()
 	if !ok {
-		errors.LogError(ctx, s.Name(), " cannot find the pending request")
+		errors.LogError(ctx, s.name, " cannot find the pending request")
 		return
 	}
 
-	// if truncated, retry with EDNS0 option(udp payload size: 1350)
+	var rec record
-	if ipRec.RawHeader.Truncated {
+	switch req.reqType {
-		// if already has EDNS0 option, no need to retry
+	case dnsmessage.TypeA:
-		if len(req.msg.Additionals) == 0 {
+		rec.A = ipRec
-			// copy necessary meta data from original request
+	case dnsmessage.TypeAAAA:
-			// and add EDNS0 option
+		rec.AAAA = ipRec
-			opt := new(dnsmessage.Resource)
-			common.Must(opt.Header.SetEDNS0(1350, 0xfe00, true))
-			opt.Body = &dnsmessage.OPTResource{}
-			newMsg := *req.msg
-			newReq := *req
-			newMsg.Additionals = append(newMsg.Additionals, *opt)
-			newMsg.ID = s.newReqID()
-			newReq.msg = &newMsg
-			s.addPendingRequest(&newReq)
-			b, _ := dns.PackMessage(newReq.msg)
-			s.udpServer.Dispatch(toDnsContext(newReq.ctx, s.address.String()), *s.address, b)
-			return
-		}
 	}
 
-	s.cacheController.updateIP(&req.dnsRequest, ipRec)
+	elapsed := time.Since(req.start)
+	errors.LogInfo(ctx, s.name, " got answer: ", req.domain, " ", req.reqType, " -> ", ipRec.IP, " ", elapsed)
+	if len(req.domain) > 0 && (rec.A != nil || rec.AAAA != nil) {
+		s.updateIP(req.domain, &rec)
+	}
+}
+
+func (s *ClassicNameServer) updateIP(domain string, newRec *record) {
+	s.Lock()
+
+	rec, found := s.ips[domain]
+	if !found {
+		rec = &record{}
+	}
+
+	updated := false
+	if isNewer(rec.A, newRec.A) {
+		rec.A = newRec.A
+		updated = true
+	}
+	if isNewer(rec.AAAA, newRec.AAAA) {
+		rec.AAAA = newRec.AAAA
+		updated = true
+	}
+
+	if updated {
+		errors.LogDebug(context.Background(), s.name, " updating IP records for domain:", domain)
+		s.ips[domain] = rec
+	}
+	if newRec.A != nil {
+		s.pub.Publish(domain+"4", nil)
+	}
+	if newRec.AAAA != nil {
+		s.pub.Publish(domain+"6", nil)
+	}
+	s.Unlock()
+	common.Must(s.cleanup.Start())
 }
 
 func (s *ClassicNameServer) newReqID() uint16 {
 	return uint16(atomic.AddUint32(&s.reqID, 1))
 }
 
-func (s *ClassicNameServer) addPendingRequest(req *udpDnsRequest) {
+func (s *ClassicNameServer) addPendingRequest(req *dnsRequest) {
 	s.Lock()
+	defer s.Unlock()
+
 	id := req.msg.ID
 	req.expire = time.Now().Add(time.Second * 8)
 	s.requests[id] = req
-	s.Unlock()
-	common.Must(s.requestsCleanup.Start())
 }
 
-func (s *ClassicNameServer) sendQuery(ctx context.Context, _ chan<- error, domain string, option dns_feature.IPOption) {
+func (s *ClassicNameServer) sendQuery(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption) {
-	errors.LogDebug(ctx, s.Name(), " querying DNS for: ", domain)
+	errors.LogDebug(ctx, s.name, " querying DNS for: ", domain)
 
-	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(s.clientIP, 0))
+	reqs := buildReqMsgs(domain, option, s.newReqID, genEDNS0Options(clientIP))
 
 	for _, req := range reqs {
-		udpReq := &udpDnsRequest{
+		s.addPendingRequest(req)
-			dnsRequest: *req,
-			ctx:        ctx,
-		}
-		s.addPendingRequest(udpReq)
 		b, _ := dns.PackMessage(req.msg)
 		s.udpServer.Dispatch(toDnsContext(ctx, s.address.String()), *s.address, b)
 	}
 }
 
-// QueryIP implements Server.
+func (s *ClassicNameServer) findIPsForDomain(domain string, option dns_feature.IPOption) ([]net.IP, error) {
-func (s *ClassicNameServer) QueryIP(ctx context.Context, domain string, option dns_feature.IPOption) ([]net.IP, uint32, error) {
+	s.RLock()
-	fqdn := Fqdn(domain)
+	record, found := s.ips[domain]
-	sub4, sub6 := s.cacheController.registerSubscribers(fqdn, option)
+	s.RUnlock()
-	defer closeSubscribers(sub4, sub6)
 
-	if s.cacheController.disableCache {
+	if !found {
-		errors.LogDebug(ctx, "DNS cache is disabled. Querying IP for ", domain, " at ", s.Name())
+		return nil, errRecordNotFound
+	}
+
+	var err4 error
+	var err6 error
+	var ips []net.Address
+	var ip6 []net.Address
+
+	if option.IPv4Enable {
+		ips, err4 = record.A.getIPs()
+	}
+
+	if option.IPv6Enable {
+		ip6, err6 = record.AAAA.getIPs()
+		ips = append(ips, ip6...)
+	}
+
+	if len(ips) > 0 {
+		return toNetIP(ips)
+	}
+
+	if err4 != nil {
+		return nil, err4
+	}
+
+	if err6 != nil {
+		return nil, err6
+	}
+
+	return nil, dns_feature.ErrEmptyResponse
+}
+
+// QueryIP implements Server.
+func (s *ClassicNameServer) QueryIP(ctx context.Context, domain string, clientIP net.IP, option dns_feature.IPOption, disableCache bool) ([]net.IP, error) {
+	fqdn := Fqdn(domain)
+	option = ResolveIpOptionOverride(s.queryStrategy, option)
+	if !option.IPv4Enable && !option.IPv6Enable {
+		return nil, dns_feature.ErrEmptyResponse
+	}
+
+	if disableCache {
+		errors.LogDebug(ctx, "DNS cache is disabled. Querying IP for ", domain, " at ", s.name)
 	} else {
-		ips, ttl, err := s.cacheController.findIPsForDomain(fqdn, option)
+		ips, err := s.findIPsForDomain(fqdn, option)
-		if !go_errors.Is(err, errRecordNotFound) {
+		if err == nil || err == dns_feature.ErrEmptyResponse {
-			errors.LogDebugInner(ctx, err, s.Name(), " cache HIT ", domain, " -> ", ips)
+			errors.LogDebugInner(ctx, err, s.name, " cache HIT ", domain, " -> ", ips)
-			log.Record(&log.DNSLog{Server: s.Name(), Domain: domain, Result: ips, Status: log.DNSCacheHit, Elapsed: 0, Error: err})
+			log.Record(&log.DNSLog{Server: s.name, Domain: domain, Result: ips, Status: log.DNSCacheHit, Elapsed: 0, Error: err})
-			return ips, ttl, err
+			return ips, err
 		}
 	}
 
-	noResponseErrCh := make(chan error, 2)
+	// ipv4 and ipv6 belong to different subscription groups
-	s.sendQuery(ctx, noResponseErrCh, fqdn, option)
+	var sub4, sub6 *pubsub.Subscriber
+	if option.IPv4Enable {
+		sub4 = s.pub.Subscribe(fqdn + "4")
+		defer sub4.Close()
+	}
+	if option.IPv6Enable {
+		sub6 = s.pub.Subscribe(fqdn + "6")
+		defer sub6.Close()
+	}
+	done := make(chan interface{})
+	go func() {
+		if sub4 != nil {
+			select {
+			case <-sub4.Wait():
+			case <-ctx.Done():
+			}
+		}
+		if sub6 != nil {
+			select {
+			case <-sub6.Wait():
+			case <-ctx.Done():
+			}
+		}
+		close(done)
+	}()
+	s.sendQuery(ctx, fqdn, clientIP, option)
 	start := time.Now()
 
-	if sub4 != nil {
+	for {
+		ips, err := s.findIPsForDomain(fqdn, option)
+		if err != errRecordNotFound {
+			log.Record(&log.DNSLog{Server: s.name, Domain: domain, Result: ips, Status: log.DNSQueried, Elapsed: time.Since(start), Error: err})
+			return ips, err
+		}
+
 		select {
 		case <-ctx.Done():
-			return nil, 0, ctx.Err()
+			return nil, ctx.Err()
-		case err := <-noResponseErrCh:
+		case <-done:
-			return nil, 0, err
-		case <-sub4.Wait():
-			sub4.Close()
 		}
 	}
-	if sub6 != nil {
-		select {
-		case <-ctx.Done():
-			return nil, 0, ctx.Err()
-		case err := <-noResponseErrCh:
-			return nil, 0, err
-		case <-sub6.Wait():
-			sub6.Close()
-		}
-	}
-
-	ips, ttl, err := s.cacheController.findIPsForDomain(fqdn, option)
-	log.Record(&log.DNSLog{Server: s.Name(), Domain: domain, Result: ips, Status: log.DNSQueried, Elapsed: time.Since(start), Error: err})
-	return ips, ttl, err
-
 }

app/metrics/config.pb.go

@@ -27,8 +27,7 @@ type Config struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Tag of the outbound handler that handles metrics http connections.
-	Tag    string `protobuf:"bytes,1,opt,name=tag,proto3" json:"tag,omitempty"`
+	Tag string `protobuf:"bytes,1,opt,name=tag,proto3" json:"tag,omitempty"`
-	Listen string `protobuf:"bytes,2,opt,name=listen,proto3" json:"listen,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -68,28 +67,20 @@ func (x *Config) GetTag() string {
 	return ""
 }
 
-func (x *Config) GetListen() string {
-	if x != nil {
-		return x.Listen
-	}
-	return ""
-}
-
 var File_app_metrics_config_proto protoreflect.FileDescriptor
 
 var file_app_metrics_config_proto_rawDesc = []byte{
 	0x0a, 0x18, 0x61, 0x70, 0x70, 0x2f, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x2f, 0x63, 0x6f,
 	0x6e, 0x66, 0x69, 0x67, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x10, 0x78, 0x72, 0x61, 0x79,
-	0x2e, 0x61, 0x70, 0x70, 0x2e, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x22, 0x32, 0x0a, 0x06,
+	0x2e, 0x61, 0x70, 0x70, 0x2e, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x22, 0x1a, 0x0a, 0x06,
 	0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x10, 0x0a, 0x03, 0x74, 0x61, 0x67, 0x18, 0x01, 0x20,
-	0x01, 0x28, 0x09, 0x52, 0x03, 0x74, 0x61, 0x67, 0x12, 0x16, 0x0a, 0x06, 0x6c, 0x69, 0x73, 0x74,
+	0x01, 0x28, 0x09, 0x52, 0x03, 0x74, 0x61, 0x67, 0x42, 0x52, 0x0a, 0x14, 0x63, 0x6f, 0x6d, 0x2e,
-	0x65, 0x6e, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x06, 0x6c, 0x69, 0x73, 0x74, 0x65, 0x6e,
+	0x78, 0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73,
-	0x42, 0x52, 0x0a, 0x14, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70,
+	0x50, 0x01, 0x5a, 0x25, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78,
-	0x2e, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x50, 0x01, 0x5a, 0x25, 0x67, 0x69, 0x74, 0x68,
+	0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x61, 0x70,
-	0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79,
+	0x70, 0x2f, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0xaa, 0x02, 0x10, 0x58, 0x72, 0x61, 0x79,
-	0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x61, 0x70, 0x70, 0x2f, 0x6d, 0x65, 0x74, 0x72, 0x69, 0x63,
+	0x2e, 0x41, 0x70, 0x70, 0x2e, 0x4d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x62, 0x06, 0x70, 0x72,
-	0x73, 0xaa, 0x02, 0x10, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x41, 0x70, 0x70, 0x2e, 0x4d, 0x65, 0x74,
+	0x6f, 0x74, 0x6f, 0x33,
-	0x72, 0x69, 0x63, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

app/metrics/config.proto

@@ -10,5 +10,4 @@ option java_multiple_files = true;
 message Config {
   // Tag of the outbound handler that handles metrics http connections.
   string tag = 1;
-  string listen = 2;
 }

app/metrics/metrics.go

@@ -24,15 +24,12 @@ type MetricsHandler struct {
 	statsManager feature_stats.Manager
 	observatory  extension.Observatory
 	tag          string
-	listen       string
-	tcpListener  net.Listener
 }
 
 // NewMetricsHandler creates a new MetricsHandler based on the given config.
 func NewMetricsHandler(ctx context.Context, config *Config) (*MetricsHandler, error) {
 	c := &MetricsHandler{
-		tag:    config.Tag,
+		tag: config.Tag,
-		listen: config.Listen,
 	}
 	common.Must(core.RequireFeatures(ctx, func(om outbound.Manager, sm feature_stats.Manager) {
 		c.statsManager = sm
@@ -90,23 +87,6 @@ func (p *MetricsHandler) Type() interface{} {
 }
 
 func (p *MetricsHandler) Start() error {
-
-	// direct listen a port if listen is set
-	if p.listen != "" {
-		TCPlistener, err := net.Listen("tcp", p.listen)
-		if err != nil {
-			return err
-		}
-		p.tcpListener = TCPlistener
-		errors.LogInfo(context.Background(), "Metrics server listening on ", p.listen)
-
-		go func() {
-			if err := http.Serve(TCPlistener, http.DefaultServeMux); err != nil {
-				errors.LogErrorInner(context.Background(), err, "failed to start metrics server")
-			}
-		}()
-	}
-
 	listener := &OutboundListener{
 		buffer: make(chan net.Conn, 4),
 		done:   done.New(),

app/observatory/burst/burstobserver.go

@@ -12,7 +12,6 @@ import (
 	"github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/extension"
 	"github.com/xtls/xray-core/features/outbound"
-	"github.com/xtls/xray-core/features/routing"
 	"google.golang.org/protobuf/proto"
 )
 
@@ -89,15 +88,13 @@ func (o *Observer) Close() error {
 
 func New(ctx context.Context, config *Config) (*Observer, error) {
 	var outboundManager outbound.Manager
-	var dispatcher routing.Dispatcher
+	err := core.RequireFeatures(ctx, func(om outbound.Manager) {
-	err := core.RequireFeatures(ctx, func(om outbound.Manager, rd routing.Dispatcher) {
 		outboundManager = om
-		dispatcher = rd
 	})
 	if err != nil {
 		return nil, errors.New("Cannot get depended features").Base(err)
 	}
-	hp := NewHealthPing(ctx, dispatcher, config.PingConfig)
+	hp := NewHealthPing(ctx, config.PingConfig)
 	return &Observer{
 		config: config,
 		ctx:    ctx,

app/observatory/burst/config.pb.go

@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.35.1
+// 	protoc-gen-go v1.35.2
 // 	protoc        v5.28.2
 // source: app/observatory/burst/config.proto
 
@@ -89,7 +89,8 @@ type HealthPingConfig struct {
 	// sampling count is the amount of recent ping results which are kept for calculation
 	SamplingCount int32 `protobuf:"varint,4,opt,name=samplingCount,proto3" json:"samplingCount,omitempty"`
 	// ping timeout, int64 values of time.Duration
-	Timeout int64 `protobuf:"varint,5,opt,name=timeout,proto3" json:"timeout,omitempty"`
+	Timeout              int64   `protobuf:"varint,5,opt,name=timeout,proto3" json:"timeout,omitempty"`
+	ExpectedResponseCode []int32 `protobuf:"varint,6,rep,packed,name=expectedResponseCode,proto3" json:"expectedResponseCode,omitempty"`
 }
 
 func (x *HealthPingConfig) Reset() {
@@ -157,6 +158,13 @@ func (x *HealthPingConfig) GetTimeout() int64 {
 	return 0
 }
 
+func (x *HealthPingConfig) GetExpectedResponseCode() []int32 {
+	if x != nil {
+		return x.ExpectedResponseCode
+	}
+	return nil
+}
+
 var File_app_observatory_burst_config_proto protoreflect.FileDescriptor
 
 var file_app_observatory_burst_config_proto_rawDesc = []byte{
@@ -173,7 +181,7 @@ var file_app_observatory_burst_config_proto_rawDesc = []byte{
 	0x2e, 0x6f, 0x62, 0x73, 0x65, 0x72, 0x76, 0x61, 0x74, 0x6f, 0x72, 0x79, 0x2e, 0x62, 0x75, 0x72,
 	0x73, 0x74, 0x2e, 0x48, 0x65, 0x61, 0x6c, 0x74, 0x68, 0x50, 0x69, 0x6e, 0x67, 0x43, 0x6f, 0x6e,
 	0x66, 0x69, 0x67, 0x52, 0x0a, 0x70, 0x69, 0x6e, 0x67, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x22,
-	0xb4, 0x01, 0x0a, 0x10, 0x48, 0x65, 0x61, 0x6c, 0x74, 0x68, 0x50, 0x69, 0x6e, 0x67, 0x43, 0x6f,
+	0xe8, 0x01, 0x0a, 0x10, 0x48, 0x65, 0x61, 0x6c, 0x74, 0x68, 0x50, 0x69, 0x6e, 0x67, 0x43, 0x6f,
 	0x6e, 0x66, 0x69, 0x67, 0x12, 0x20, 0x0a, 0x0b, 0x64, 0x65, 0x73, 0x74, 0x69, 0x6e, 0x61, 0x74,
 	0x69, 0x6f, 0x6e, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0b, 0x64, 0x65, 0x73, 0x74, 0x69,
 	0x6e, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x12, 0x22, 0x0a, 0x0c, 0x63, 0x6f, 0x6e, 0x6e, 0x65, 0x63,
@@ -184,14 +192,18 @@ var file_app_observatory_burst_config_proto_rawDesc = []byte{
 	0x6e, 0x67, 0x43, 0x6f, 0x75, 0x6e, 0x74, 0x18, 0x04, 0x20, 0x01, 0x28, 0x05, 0x52, 0x0d, 0x73,
 	0x61, 0x6d, 0x70, 0x6c, 0x69, 0x6e, 0x67, 0x43, 0x6f, 0x75, 0x6e, 0x74, 0x12, 0x18, 0x0a, 0x07,
 	0x74, 0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74, 0x18, 0x05, 0x20, 0x01, 0x28, 0x03, 0x52, 0x07, 0x74,
-	0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74, 0x42, 0x70, 0x0a, 0x1e, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72,
+	0x69, 0x6d, 0x65, 0x6f, 0x75, 0x74, 0x12, 0x32, 0x0a, 0x14, 0x65, 0x78, 0x70, 0x65, 0x63, 0x74,
-	0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x6f, 0x62, 0x73, 0x65, 0x72, 0x76, 0x61, 0x74, 0x6f,
+	0x65, 0x64, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x43, 0x6f, 0x64, 0x65, 0x18, 0x06,
-	0x72, 0x79, 0x2e, 0x62, 0x75, 0x72, 0x73, 0x74, 0x50, 0x01, 0x5a, 0x2f, 0x67, 0x69, 0x74, 0x68,
+	0x20, 0x03, 0x28, 0x05, 0x52, 0x14, 0x65, 0x78, 0x70, 0x65, 0x63, 0x74, 0x65, 0x64, 0x52, 0x65,
-	0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79,
+	0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x43, 0x6f, 0x64, 0x65, 0x42, 0x70, 0x0a, 0x1e, 0x63, 0x6f,
-	0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x61, 0x70, 0x70, 0x2f, 0x6f, 0x62, 0x73, 0x65, 0x72, 0x76,
+	0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x6f, 0x62, 0x73, 0x65, 0x72,
-	0x61, 0x74, 0x6f, 0x72, 0x79, 0x2f, 0x62, 0x75, 0x72, 0x73, 0x74, 0xaa, 0x02, 0x1a, 0x58, 0x72,
+	0x76, 0x61, 0x74, 0x6f, 0x72, 0x79, 0x2e, 0x62, 0x75, 0x72, 0x73, 0x74, 0x50, 0x01, 0x5a, 0x2f,
-	0x61, 0x79, 0x2e, 0x41, 0x70, 0x70, 0x2e, 0x4f, 0x62, 0x73, 0x65, 0x72, 0x76, 0x61, 0x74, 0x6f,
+	0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f,
-	0x72, 0x79, 0x2e, 0x42, 0x75, 0x72, 0x73, 0x74, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x61, 0x70, 0x70, 0x2f, 0x6f, 0x62,
+	0x73, 0x65, 0x72, 0x76, 0x61, 0x74, 0x6f, 0x72, 0x79, 0x2f, 0x62, 0x75, 0x72, 0x73, 0x74, 0xaa,
+	0x02, 0x1a, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x41, 0x70, 0x70, 0x2e, 0x4f, 0x62, 0x73, 0x65, 0x72,
+	0x76, 0x61, 0x74, 0x6f, 0x72, 0x79, 0x2e, 0x42, 0x75, 0x72, 0x73, 0x74, 0x62, 0x06, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

app/observatory/burst/config.proto

@@ -26,4 +26,5 @@ message HealthPingConfig {
   int32 samplingCount = 4;
   // ping timeout, int64 values of time.Duration
   int64 timeout = 5;
+  repeated int32 expectedResponseCode = 6;
 }

app/observatory/burst/healthping.go

@@ -9,22 +9,21 @@ import (
 
 	"github.com/xtls/xray-core/common/dice"
 	"github.com/xtls/xray-core/common/errors"
-	"github.com/xtls/xray-core/features/routing"
 )
 
 // HealthPingSettings holds settings for health Checker
 type HealthPingSettings struct {
-	Destination   string        `json:"destination"`
+	Destination          string        `json:"destination"`
-	Connectivity  string        `json:"connectivity"`
+	Connectivity         string        `json:"connectivity"`
-	Interval      time.Duration `json:"interval"`
+	Interval             time.Duration `json:"interval"`
-	SamplingCount int           `json:"sampling"`
+	SamplingCount        int           `json:"sampling"`
-	Timeout       time.Duration `json:"timeout"`
+	Timeout              time.Duration `json:"timeout"`
+	ExpectedResponseCode []int32       `json:"expectedResponseCode"`
 }
 
 // HealthPing is the health checker for balancers
 type HealthPing struct {
 	ctx         context.Context
-	dispatcher  routing.Dispatcher
 	access      sync.Mutex
 	ticker      *time.Ticker
 	tickerClose chan struct{}
@@ -34,15 +33,16 @@ type HealthPing struct {
 }
 
 // NewHealthPing creates a new HealthPing with settings
-func NewHealthPing(ctx context.Context, dispatcher routing.Dispatcher, config *HealthPingConfig) *HealthPing {
+func NewHealthPing(ctx context.Context, config *HealthPingConfig) *HealthPing {
 	settings := &HealthPingSettings{}
 	if config != nil {
 		settings = &HealthPingSettings{
-			Connectivity:  strings.TrimSpace(config.Connectivity),
+			Connectivity:         strings.TrimSpace(config.Connectivity),
-			Destination:   strings.TrimSpace(config.Destination),
+			Destination:          strings.TrimSpace(config.Destination),
-			Interval:      time.Duration(config.Interval),
+			Interval:             time.Duration(config.Interval),
-			SamplingCount: int(config.SamplingCount),
+			SamplingCount:        int(config.SamplingCount),
-			Timeout:       time.Duration(config.Timeout),
+			Timeout:              time.Duration(config.Timeout),
+			ExpectedResponseCode: config.ExpectedResponseCode,
 		}
 	}
 	if settings.Destination == "" {
@@ -50,6 +50,7 @@ func NewHealthPing(ctx context.Context, dispatcher routing.Dispatcher, config *H
 		// https://github.com/chromium/chromium/blob/main/components/safety_check/url_constants.cc#L10
 		// https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/safety_check/url_constants.cc#10
 		settings.Destination = "https://connectivitycheck.gstatic.com/generate_204"
+		settings.ExpectedResponseCode = []int32{ 204 }
 	}
 	if settings.Interval == 0 {
 		settings.Interval = time.Duration(1) * time.Minute
@@ -66,10 +67,9 @@ func NewHealthPing(ctx context.Context, dispatcher routing.Dispatcher, config *H
 		settings.Timeout = time.Duration(5) * time.Second
 	}
 	return &HealthPing{
-		ctx:        ctx,
+		ctx:      ctx,
-		dispatcher: dispatcher,
+		Settings: settings,
-		Settings:   settings,
+		Results:  nil,
-		Results:    nil,
 	}
 }
 
@@ -152,10 +152,10 @@ func (h *HealthPing) doCheck(tags []string, duration time.Duration, rounds int)
 		handler := tag
 		client := newPingClient(
 			h.ctx,
-			h.dispatcher,
 			h.Settings.Destination,
 			h.Settings.Timeout,
 			handler,
+			h.Settings.ExpectedResponseCode,
 		)
 		for i := 0; i < rounds; i++ {
 			delay := time.Duration(0)

app/observatory/burst/ping.go

@@ -5,31 +5,34 @@ import (
 	"net/http"
 	"time"
 
+	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
-	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/transport/internet/tagged"
 )
 
 type pingClient struct {
-	destination string
+	destination          string
-	httpClient  *http.Client
+	httpClient           *http.Client
+	expectedResponseCode []int32
 }
 
-func newPingClient(ctx context.Context, dispatcher routing.Dispatcher, destination string, timeout time.Duration, handler string) *pingClient {
+func newPingClient(ctx context.Context, destination string, timeout time.Duration, handler string, expectedResponseCode []int32) *pingClient {
 	return &pingClient{
-		destination: destination,
+		destination:          destination,
-		httpClient:  newHTTPClient(ctx, dispatcher, handler, timeout),
+		httpClient:           newHTTPClient(ctx, handler, timeout),
+		expectedResponseCode: expectedResponseCode,
 	}
 }
 
 func newDirectPingClient(destination string, timeout time.Duration) *pingClient {
 	return &pingClient{
-		destination: destination,
+		destination:          destination,
-		httpClient:  &http.Client{Timeout: timeout},
+		httpClient:           &http.Client{Timeout: timeout},
+		expectedResponseCode: []int32{},
 	}
 }
 
-func newHTTPClient(ctxv context.Context, dispatcher routing.Dispatcher, handler string, timeout time.Duration) *http.Client {
+func newHTTPClient(ctxv context.Context, handler string, timeout time.Duration) *http.Client {
 	tr := &http.Transport{
 		DisableKeepAlives: true,
 		DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
@@ -37,7 +40,7 @@ func newHTTPClient(ctxv context.Context, dispatcher routing.Dispatcher, handler
 			if err != nil {
 				return nil, err
 			}
-			return tagged.Dialer(ctxv, dispatcher, dest, handler)
+			return tagged.Dialer(ctxv, dest, handler)
 		},
 	}
 	return &http.Client{
@@ -64,6 +67,18 @@ func (s *pingClient) MeasureDelay() (time.Duration, error) {
 	if err != nil {
 		return rttFailed, err
 	}
+	if len(s.expectedResponseCode) > 0 {
+		found := false
+		for _, c := range s.expectedResponseCode {
+			if c == int32(resp.StatusCode) {
+				found = true
+				break
+			}
+		}
+		if !found {
+			return rttFailed, errors.New("Unexpected response code: ", resp.StatusCode, " expected: ", s.expectedResponseCode)
+		}
+	}
 	// don't wait for body
 	resp.Body.Close()
 	return time.Since(start), nil

app/observatory/command/command.go

@@ -38,7 +38,7 @@ func init() {
 		sv := &service{v: s}
 		err := s.RequireFeatures(func(Observatory extension.Observatory) {
 			sv.observatory = Observatory
-		}, false)
+		})
 		if err != nil {
 			return nil, err
 		}

app/observatory/observer.go

@@ -18,7 +18,6 @@ import (
 	"github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/extension"
 	"github.com/xtls/xray-core/features/outbound"
-	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/transport/internet/tagged"
 	"google.golang.org/protobuf/proto"
 )
@@ -32,8 +31,7 @@ type Observer struct {
 
 	finished *done.Instance
 
-	ohm        outbound.Manager
+	ohm outbound.Manager
-	dispatcher routing.Dispatcher
 }
 
 func (o *Observer) GetObservation(ctx context.Context) (proto.Message, error) {
@@ -133,7 +131,7 @@ func (o *Observer) probe(outbound string) ProbeResult {
 					return errors.New("cannot understand address").Base(err)
 				}
 				trackedCtx := session.TrackedConnectionError(o.ctx, errorCollectorForRequest)
-				conn, err := tagged.Dialer(trackedCtx, o.dispatcher, dest, outbound)
+				conn, err := tagged.Dialer(trackedCtx, dest, outbound)
 				if err != nil {
 					return errors.New("cannot dial remote address ", dest).Base(err)
 				}
@@ -217,19 +215,16 @@ func (o *Observer) findStatusLocationLockHolderOnly(outbound string) int {
 
 func New(ctx context.Context, config *Config) (*Observer, error) {
 	var outboundManager outbound.Manager
-	var dispatcher routing.Dispatcher
+	err := core.RequireFeatures(ctx, func(om outbound.Manager) {
-	err := core.RequireFeatures(ctx, func(om outbound.Manager, rd routing.Dispatcher) {
 		outboundManager = om
-		dispatcher = rd
 	})
 	if err != nil {
 		return nil, errors.New("Cannot get depended features").Base(err)
 	}
 	return &Observer{
-		config:     config,
+		config: config,
-		ctx:        ctx,
+		ctx:    ctx,
-		ohm:        outboundManager,
+		ohm:    outboundManager,
-		dispatcher: dispatcher,
 	}, nil
 }
 

app/proxyman/command/command.go

@@ -177,7 +177,7 @@ func (s *service) Register(server *grpc.Server) {
 	common.Must(s.v.RequireFeatures(func(im inbound.Manager, om outbound.Manager) {
 		hs.ihm = im
 		hs.ohm = om
-	}, false))
+	}))
 	RegisterHandlerServiceServer(server, hs)
 
 	// For compatibility purposes

app/proxyman/inbound/dynamic.go

@@ -23,7 +23,7 @@ type DynamicInboundHandler struct {
 	receiverConfig *proxyman.ReceiverConfig
 	streamSettings *internet.MemoryStreamConfig
 	portMutex      sync.Mutex
-	portsInUse     map[net.Port]struct{}
+	portsInUse     map[net.Port]bool
 	workerMutex    sync.RWMutex
 	worker         []worker
 	lastRefresh    time.Time
@@ -39,7 +39,7 @@ func NewDynamicInboundHandler(ctx context.Context, tag string, receiverConfig *p
 		tag:            tag,
 		proxyConfig:    proxyConfig,
 		receiverConfig: receiverConfig,
-		portsInUse:     make(map[net.Port]struct{}),
+		portsInUse:     make(map[net.Port]bool),
 		mux:            mux.NewServer(ctx),
 		v:              v,
 		ctx:            ctx,
@@ -84,7 +84,7 @@ func (h *DynamicInboundHandler) allocatePort() net.Port {
 		port := net.Port(allPorts[r])
 		_, used := h.portsInUse[port]
 		if !used {
-			h.portsInUse[port] = struct{}{}
+			h.portsInUse[port] = true
 			return port
 		}
 	}

app/proxyman/inbound/inbound.go

@@ -7,7 +7,6 @@ import (
 	"github.com/xtls/xray-core/app/proxyman"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/errors"
-	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/serial"
 	"github.com/xtls/xray-core/common/session"
 	"github.com/xtls/xray-core/core"
@@ -159,9 +158,6 @@ func NewHandler(ctx context.Context, config *core.InboundHandlerConfig) (inbound
 			Mark: streamSettings.SocketSettings.Mark,
 		})
 	}
-	if streamSettings != nil && streamSettings.ProtocolName == "splithttp" {
-		ctx = session.ContextWithAllowedNetwork(ctx, net.Network_UDP)
-	}
 
 	allocStrategy := receiverSettings.AllocationStrategy
 	if allocStrategy == nil || allocStrategy.Type == proxyman.AllocationStrategy_Always {

app/proxyman/inbound/worker.go

@@ -324,7 +324,6 @@ func (w *udpWorker) callback(b *buf.Buffer, source net.Destination, originalDest
 			if w.sniffingConfig != nil {
 				content.SniffingRequest.Enabled = w.sniffingConfig.Enabled
 				content.SniffingRequest.OverrideDestinationForProtocol = w.sniffingConfig.DestinationOverride
-				content.SniffingRequest.ExcludeForDomain = w.sniffingConfig.DomainsExcluded
 				content.SniffingRequest.MetadataOnly = w.sniffingConfig.MetadataOnly
 				content.SniffingRequest.RouteOnly = w.sniffingConfig.RouteOnly
 			}
@@ -465,7 +464,8 @@ func (w *dsWorker) callback(conn stat.Connection) {
 		}
 	}
 	ctx = session.ContextWithInbound(ctx, &session.Inbound{
-		Source:  net.DestinationFromAddr(conn.RemoteAddr()),
+		// Unix have no source addr, so we use gateway as source for log.
+		Source:  net.UnixDestination(w.address),
 		Gateway: net.UnixDestination(w.address),
 		Tag:     w.tag,
 		Conn:    conn,

app/proxyman/outbound/handler.go

@@ -241,9 +241,7 @@ func (h *Handler) DestIpAddress() net.IP {
 // Dial implements internet.Dialer.
 func (h *Handler) Dial(ctx context.Context, dest net.Destination) (stat.Connection, error) {
 	if h.senderSettings != nil {
-
 		if h.senderSettings.ProxySettings.HasTag() {
-
 			tag := h.senderSettings.ProxySettings.Tag
 			handler := h.outboundManager.GetHandler(tag)
 			if handler != nil {
@@ -272,40 +270,13 @@ func (h *Handler) Dial(ctx context.Context, dest net.Destination) (stat.Connecti
 		}
 
 		if h.senderSettings.Via != nil {
-
 			outbounds := session.OutboundsFromContext(ctx)
 			ob := outbounds[len(outbounds)-1]
-			addr := h.senderSettings.Via.AsAddress()
+			if h.senderSettings.ViaCidr == "" {
-			var domain string
+				ob.Gateway = h.senderSettings.Via.AsAddress()
-			if addr.Family().IsDomain() {
+			} else { //Get a random address.
-				domain = addr.Domain()
+				ob.Gateway = ParseRandomIPv6(h.senderSettings.Via.AsAddress(), h.senderSettings.ViaCidr)
 			}
-			switch {
-			case h.senderSettings.ViaCidr != "":
-				ob.Gateway = ParseRandomIP(addr, h.senderSettings.ViaCidr)
-
-			case domain == "origin":
-
-				if inbound := session.InboundFromContext(ctx); inbound != nil {
-					origin, _, err := net.SplitHostPort(inbound.Conn.LocalAddr().String())
-					if err == nil {
-						ob.Gateway = net.ParseAddress(origin)
-					}
-
-				}
-			case domain == "srcip":
-				if inbound := session.InboundFromContext(ctx); inbound != nil {
-					srcip, _, err := net.SplitHostPort(inbound.Conn.RemoteAddr().String())
-					if err == nil {
-						ob.Gateway = net.ParseAddress(srcip)
-					}
-				}
-			//case addr.Family().IsDomain():
-			default:
-				ob.Gateway = addr
-
-			}
-
 		}
 	}
 
@@ -345,25 +316,23 @@ func (h *Handler) Start() error {
 // Close implements common.Closable.
 func (h *Handler) Close() error {
 	common.Close(h.mux)
-	common.Close(h.proxy)
 	return nil
 }
 
-func ParseRandomIP(addr net.Address, prefix string) net.Address {
+func ParseRandomIPv6(address net.Address, prefix string) net.Address {
+	_, network, _ := gonet.ParseCIDR(address.IP().String() + "/" + prefix)
 
-	_, ipnet, _ := gonet.ParseCIDR(addr.IP().String() + "/" + prefix)
+	maskSize, totalBits := network.Mask.Size()
+	subnetSize := big.NewInt(1).Lsh(big.NewInt(1), uint(totalBits-maskSize))
 
-	ones, bits := ipnet.Mask.Size()
+	// random
-	subnetSize := new(big.Int).Lsh(big.NewInt(1), uint(bits-ones))
+	randomBigInt, _ := rand.Int(rand.Reader, subnetSize)
 
-	rnd, _ := rand.Int(rand.Reader, subnetSize)
+	startIPBigInt := big.NewInt(0).SetBytes(network.IP.To16())
+	randomIPBigInt := big.NewInt(0).Add(startIPBigInt, randomBigInt)
 
-	startInt := new(big.Int).SetBytes(ipnet.IP)
+	randomIPBytes := randomIPBigInt.Bytes()
-	rndInt := new(big.Int).Add(startInt, rnd)
+	randomIPBytes = append(make([]byte, 16-len(randomIPBytes)), randomIPBytes...)
 
-	rndBytes := rndInt.Bytes()
+	return net.ParseAddress(gonet.IP(randomIPBytes).String())
-	padded := make([]byte, len(ipnet.IP))
-	copy(padded[len(padded)-len(rndBytes):], rndBytes)
-
-	return net.ParseAddress(gonet.IP(padded).String())
 }

app/router/balancing.go

@@ -31,12 +31,6 @@ type RoundRobinStrategy struct {
 
 func (s *RoundRobinStrategy) InjectContext(ctx context.Context) {
 	s.ctx = ctx
-	if len(s.FallbackTag) > 0 {
-		common.Must(core.RequireFeatures(s.ctx, func(observatory extension.Observatory) error {
-			s.observatory = observatory
-			return nil
-		}))
-	}
 }
 
 func (s *RoundRobinStrategy) GetPrincipleTarget(strings []string) []string {
@@ -44,6 +38,12 @@ func (s *RoundRobinStrategy) GetPrincipleTarget(strings []string) []string {
 }
 
 func (s *RoundRobinStrategy) PickOutbound(tags []string) string {
+	if len(s.FallbackTag) > 0 && s.observatory == nil {
+		common.Must(core.RequireFeatures(s.ctx, func(observatory extension.Observatory) error {
+			s.observatory = observatory
+			return nil
+		}))
+	}
 	if s.observatory != nil {
 		observeReport, err := s.observatory.GetObservation(s.ctx)
 		if err == nil {

app/router/command/command.go

@@ -135,7 +135,7 @@ func (s *service) Register(server *grpc.Server) {
 		vCoreDesc := RoutingService_ServiceDesc
 		vCoreDesc.ServiceName = "v2ray.core.app.router.command.RoutingService"
 		server.RegisterService(&vCoreDesc, rs)
-	}, false))
+	}))
 }
 
 func init() {

app/router/condition.go

@@ -119,7 +119,7 @@ type MultiGeoIPMatcher struct {
 func NewMultiGeoIPMatcher(geoips []*GeoIP, onSource bool) (*MultiGeoIPMatcher, error) {
 	var matchers []*GeoIPMatcher
 	for _, geoip := range geoips {
-		matcher, err := GlobalGeoIPContainer.Add(geoip)
+		matcher, err := globalGeoIPContainer.Add(geoip)
 		if err != nil {
 			return nil, err
 		}

app/router/condition_geoip.go

@@ -115,4 +115,4 @@ func (c *GeoIPMatcherContainer) Add(geoip *GeoIP) (*GeoIPMatcher, error) {
 	return m, nil
 }
 
-var GlobalGeoIPContainer GeoIPMatcherContainer
+var globalGeoIPContainer GeoIPMatcherContainer

app/router/condition_geoip_test.go

@@ -1,7 +1,6 @@
 package router_test
 
 import (
-	"fmt"
 	"os"
 	"path/filepath"
 	"testing"
@@ -14,25 +13,16 @@ import (
 	"google.golang.org/protobuf/proto"
 )
 
-func getAssetPath(file string) (string, error) {
+func init() {
-	path := platform.GetAssetLocation(file)
+	wd, err := os.Getwd()
-	_, err := os.Stat(path)
+	common.Must(err)
-	if os.IsNotExist(err) {
-		path := filepath.Join("..", "..", "resources", file)
-		_, err := os.Stat(path)
-		if os.IsNotExist(err) {
-			return "", fmt.Errorf("can't find %s in standard asset locations or {project_root}/resources", file)
-		}
-		if err != nil {
-			return "", fmt.Errorf("can't stat %s: %v", path, err)
-		}
-		return path, nil
-	}
-	if err != nil {
-		return "", fmt.Errorf("can't stat %s: %v", path, err)
-	}
 
-	return path, nil
+	if _, err := os.Stat(platform.GetAssetLocation("geoip.dat")); err != nil && os.IsNotExist(err) {
+		common.Must(filesystem.CopyFile(platform.GetAssetLocation("geoip.dat"), filepath.Join(wd, "..", "..", "resources", "geoip.dat")))
+	}
+	if _, err := os.Stat(platform.GetAssetLocation("geosite.dat")); err != nil && os.IsNotExist(err) {
+		common.Must(filesystem.CopyFile(platform.GetAssetLocation("geosite.dat"), filepath.Join(wd, "..", "..", "resources", "geosite.dat")))
+	}
 }
 
 func TestGeoIPMatcherContainer(t *testing.T) {
@@ -227,15 +217,10 @@ func TestGeoIPMatcher6US(t *testing.T) {
 }
 
 func loadGeoIP(country string) ([]*router.CIDR, error) {
-	path, err := getAssetPath("geoip.dat")
+	geoipBytes, err := filesystem.ReadAsset("geoip.dat")
 	if err != nil {
 		return nil, err
 	}
-	geoipBytes, err := filesystem.ReadFile(path)
-	if err != nil {
-		return nil, err
-	}
-
 	var geoipList router.GeoIPList
 	if err := proto.Unmarshal(geoipBytes, &geoipList); err != nil {
 		return nil, err

app/router/condition_test.go

@@ -1,6 +1,8 @@
 package router_test
 
 import (
+	"os"
+	"path/filepath"
 	"strconv"
 	"testing"
 
@@ -8,6 +10,7 @@ import (
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/platform"
 	"github.com/xtls/xray-core/common/platform/filesystem"
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/common/protocol/http"
@@ -17,6 +20,18 @@ import (
 	"google.golang.org/protobuf/proto"
 )
 
+func init() {
+	wd, err := os.Getwd()
+	common.Must(err)
+
+	if _, err := os.Stat(platform.GetAssetLocation("geoip.dat")); err != nil && os.IsNotExist(err) {
+		common.Must(filesystem.CopyFile(platform.GetAssetLocation("geoip.dat"), filepath.Join(wd, "..", "..", "release", "config", "geoip.dat")))
+	}
+	if _, err := os.Stat(platform.GetAssetLocation("geosite.dat")); err != nil && os.IsNotExist(err) {
+		common.Must(filesystem.CopyFile(platform.GetAssetLocation("geosite.dat"), filepath.Join(wd, "..", "..", "release", "config", "geosite.dat")))
+	}
+}
+
 func withBackground() routing.Context {
 	return &routing_session.Context{}
 }
@@ -301,15 +316,10 @@ func TestRoutingRule(t *testing.T) {
 }
 
 func loadGeoSite(country string) ([]*Domain, error) {
-	path, err := getAssetPath("geosite.dat")
+	geositeBytes, err := filesystem.ReadAsset("geosite.dat")
 	if err != nil {
 		return nil, err
 	}
-	geositeBytes, err := filesystem.ReadFile(path)
-	if err != nil {
-		return nil, err
-	}
-
 	var geositeList GeoSiteList
 	if err := proto.Unmarshal(geositeBytes, &geositeList); err != nil {
 		return nil, err

app/router/router_test.go

@@ -177,7 +177,7 @@ func TestIPOnDemand(t *testing.T) {
 		IPv4Enable: true,
 		IPv6Enable: true,
 		FakeEnable: false,
-	}).Return([]net.IP{{192, 168, 0, 1}}, uint32(600), nil).AnyTimes()
+	}).Return([]net.IP{{192, 168, 0, 1}}, nil).AnyTimes()
 
 	r := new(Router)
 	common.Must(r.Init(context.TODO(), config, mockDNS, nil, nil))
@@ -222,7 +222,7 @@ func TestIPIfNonMatchDomain(t *testing.T) {
 		IPv4Enable: true,
 		IPv6Enable: true,
 		FakeEnable: false,
-	}).Return([]net.IP{{192, 168, 0, 1}}, uint32(600), nil).AnyTimes()
+	}).Return([]net.IP{{192, 168, 0, 1}}, nil).AnyTimes()
 
 	r := new(Router)
 	common.Must(r.Init(context.TODO(), config, mockDNS, nil, nil))

app/router/strategy_leastload.go

@@ -58,12 +58,8 @@ type node struct {
 	RTTDeviationCost time.Duration
 }
 
-func (s *LeastLoadStrategy) InjectContext(ctx context.Context) {
+func (l *LeastLoadStrategy) InjectContext(ctx context.Context) {
-	s.ctx = ctx
+	l.ctx = ctx
-	common.Must(core.RequireFeatures(s.ctx, func(observatory extension.Observatory) error {
-		s.observer = observatory
-		return nil
-	}))
 }
 
 func (s *LeastLoadStrategy) PickOutbound(candidates []string) string {
@@ -140,8 +136,10 @@ func (s *LeastLoadStrategy) selectLeastLoad(nodes []*node) []*node {
 
 func (s *LeastLoadStrategy) getNodes(candidates []string, maxRTT time.Duration) []*node {
 	if s.observer == nil {
-		errors.LogError(s.ctx, "observer is nil")
+		common.Must(core.RequireFeatures(s.ctx, func(observatory extension.Observatory) error {
-		return make([]*node, 0)
+			s.observer = observatory
+			return nil
+		}))
 	}
 	observeResult, err := s.observer.GetObservation(s.ctx)
 	if err != nil {

app/router/strategy_leastping.go

@@ -21,20 +21,19 @@ func (l *LeastPingStrategy) GetPrincipleTarget(strings []string) []string {
 
 func (l *LeastPingStrategy) InjectContext(ctx context.Context) {
 	l.ctx = ctx
-	common.Must(core.RequireFeatures(l.ctx, func(observatory extension.Observatory) error {
-		l.observatory = observatory
-		return nil
-	}))
 }
 
 func (l *LeastPingStrategy) PickOutbound(strings []string) string {
 	if l.observatory == nil {
-		errors.LogError(l.ctx, "observer is nil")
+		common.Must(core.RequireFeatures(l.ctx, func(observatory extension.Observatory) error {
-		return ""
+			l.observatory = observatory
+			return nil
+		}))
 	}
+
 	observeReport, err := l.observatory.GetObservation(l.ctx)
 	if err != nil {
-		errors.LogInfoInner(l.ctx, err, "cannot get observer report")
+		errors.LogInfoInner(l.ctx, err, "cannot get observe report")
 		return ""
 	}
 	outboundsList := outboundList(strings)

app/router/strategy_random.go

@@ -20,12 +20,6 @@ type RandomStrategy struct {
 
 func (s *RandomStrategy) InjectContext(ctx context.Context) {
 	s.ctx = ctx
-	if len(s.FallbackTag) > 0 {
-		common.Must(core.RequireFeatures(s.ctx, func(observatory extension.Observatory) error {
-			s.observatory = observatory
-			return nil
-		}))
-	}
 }
 
 func (s *RandomStrategy) GetPrincipleTarget(strings []string) []string {
@@ -33,6 +27,12 @@ func (s *RandomStrategy) GetPrincipleTarget(strings []string) []string {
 }
 
 func (s *RandomStrategy) PickOutbound(candidates []string) string {
+	if len(s.FallbackTag) > 0 && s.observatory == nil {
+		common.Must(core.RequireFeatures(s.ctx, func(observatory extension.Observatory) error {
+			s.observatory = observatory
+			return nil
+		}))
+	}
 	if s.observatory != nil {
 		observeReport, err := s.observatory.GetObservation(s.ctx)
 		if err == nil {

app/stats/command/command.go

@@ -60,24 +60,6 @@ func (s *statsServer) GetStatsOnline(ctx context.Context, request *GetStatsReque
 	}, nil
 }
 
-func (s *statsServer) GetStatsOnlineIpList(ctx context.Context, request *GetStatsRequest) (*GetStatsOnlineIpListResponse, error) {
-	c := s.stats.GetOnlineMap(request.Name)
-
-	if c == nil {
-		return nil, errors.New(request.Name, " not found.")
-	}
-
-	ips := make(map[string]int64)
-	for ip, t := range c.IpTimeMap() {
-		ips[ip] = t.Unix()
-	}
-
-	return &GetStatsOnlineIpListResponse{
-		Name: request.Name,
-		Ips:  ips,
-	}, nil
-}
-
 func (s *statsServer) QueryStats(ctx context.Context, request *QueryStatsRequest) (*QueryStatsResponse, error) {
 	matcher, err := strmatcher.Substr.New(request.Pattern)
 	if err != nil {

app/stats/command/command.pb.go

@@ -424,59 +424,6 @@ func (x *SysStatsResponse) GetUptime() uint32 {
 	return 0
 }
 
-type GetStatsOnlineIpListResponse struct {
-	state         protoimpl.MessageState
-	sizeCache     protoimpl.SizeCache
-	unknownFields protoimpl.UnknownFields
-
-	Name string           `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
-	Ips  map[string]int64 `protobuf:"bytes,2,rep,name=ips,proto3" json:"ips,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"varint,2,opt,name=value,proto3"`
-}
-
-func (x *GetStatsOnlineIpListResponse) Reset() {
-	*x = GetStatsOnlineIpListResponse{}
-	mi := &file_app_stats_command_command_proto_msgTypes[7]
-	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-	ms.StoreMessageInfo(mi)
-}
-
-func (x *GetStatsOnlineIpListResponse) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*GetStatsOnlineIpListResponse) ProtoMessage() {}
-
-func (x *GetStatsOnlineIpListResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_app_stats_command_command_proto_msgTypes[7]
-	if x != nil {
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		if ms.LoadMessageInfo() == nil {
-			ms.StoreMessageInfo(mi)
-		}
-		return ms
-	}
-	return mi.MessageOf(x)
-}
-
-// Deprecated: Use GetStatsOnlineIpListResponse.ProtoReflect.Descriptor instead.
-func (*GetStatsOnlineIpListResponse) Descriptor() ([]byte, []int) {
-	return file_app_stats_command_command_proto_rawDescGZIP(), []int{7}
-}
-
-func (x *GetStatsOnlineIpListResponse) GetName() string {
-	if x != nil {
-		return x.Name
-	}
-	return ""
-}
-
-func (x *GetStatsOnlineIpListResponse) GetIps() map[string]int64 {
-	if x != nil {
-		return x.Ips
-	}
-	return nil
-}
-
 type Config struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -485,7 +432,7 @@ type Config struct {
 
 func (x *Config) Reset() {
 	*x = Config{}
-	mi := &file_app_stats_command_command_proto_msgTypes[8]
+	mi := &file_app_stats_command_command_proto_msgTypes[7]
 	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 	ms.StoreMessageInfo(mi)
 }
@@ -497,7 +444,7 @@ func (x *Config) String() string {
 func (*Config) ProtoMessage() {}
 
 func (x *Config) ProtoReflect() protoreflect.Message {
-	mi := &file_app_stats_command_command_proto_msgTypes[8]
+	mi := &file_app_stats_command_command_proto_msgTypes[7]
 	if x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -510,7 +457,7 @@ func (x *Config) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Config.ProtoReflect.Descriptor instead.
 func (*Config) Descriptor() ([]byte, []int) {
-	return file_app_stats_command_command_proto_rawDescGZIP(), []int{8}
+	return file_app_stats_command_command_proto_rawDescGZIP(), []int{7}
 }
 
 var File_app_stats_command_command_proto protoreflect.FileDescriptor
@@ -559,60 +506,40 @@ var file_app_stats_command_command_proto_rawDesc = []byte{
 	0x54, 0x6f, 0x74, 0x61, 0x6c, 0x4e, 0x73, 0x18, 0x09, 0x20, 0x01, 0x28, 0x04, 0x52, 0x0c, 0x50,
 	0x61, 0x75, 0x73, 0x65, 0x54, 0x6f, 0x74, 0x61, 0x6c, 0x4e, 0x73, 0x12, 0x16, 0x0a, 0x06, 0x55,
 	0x70, 0x74, 0x69, 0x6d, 0x65, 0x18, 0x0a, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x06, 0x55, 0x70, 0x74,
-	0x69, 0x6d, 0x65, 0x22, 0xbb, 0x01, 0x0a, 0x1c, 0x47, 0x65, 0x74, 0x53, 0x74, 0x61, 0x74, 0x73,
+	0x69, 0x6d, 0x65, 0x22, 0x08, 0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x32, 0xa1, 0x03,
-	0x4f, 0x6e, 0x6c, 0x69, 0x6e, 0x65, 0x49, 0x70, 0x4c, 0x69, 0x73, 0x74, 0x52, 0x65, 0x73, 0x70,
+	0x0a, 0x0c, 0x53, 0x74, 0x61, 0x74, 0x73, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x12, 0x5f,
-	0x6f, 0x6e, 0x73, 0x65, 0x12, 0x12, 0x0a, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20, 0x01,
+	0x0a, 0x08, 0x47, 0x65, 0x74, 0x53, 0x74, 0x61, 0x74, 0x73, 0x12, 0x27, 0x2e, 0x78, 0x72, 0x61,
-	0x28, 0x09, 0x52, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x12, 0x4f, 0x0a, 0x03, 0x69, 0x70, 0x73, 0x18,
-	0x02, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x3d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70,
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-	0x18, 0x02, 0x20, 0x01, 0x28, 0x03, 0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x3a, 0x02, 0x38,
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-	0x65, 0x49, 0x70, 0x4c, 0x69, 0x73, 0x74, 0x12, 0x27, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x61,
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-	0x1a, 0x34, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x73, 0x74, 0x61, 0x74,
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-	0x73, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x61, 0x6e, 0x64, 0x2e, 0x47, 0x65, 0x74, 0x53, 0x74, 0x61,
+	0x61, 0x6e, 0x64, 0x2e, 0x47, 0x65, 0x74, 0x53, 0x74, 0x61, 0x74, 0x73, 0x52, 0x65, 0x73, 0x70,
-	0x74, 0x73, 0x4f, 0x6e, 0x6c, 0x69, 0x6e, 0x65, 0x49, 0x70, 0x4c, 0x69, 0x73, 0x74, 0x52, 0x65,
+	0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x12, 0x65, 0x0a, 0x0a, 0x51, 0x75, 0x65, 0x72, 0x79, 0x53,
-	0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x42, 0x64, 0x0a, 0x1a, 0x63, 0x6f, 0x6d, 0x2e,
+	0x74, 0x61, 0x74, 0x73, 0x12, 0x29, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e,
-	0x78, 0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x73, 0x74, 0x61, 0x74, 0x73, 0x2e, 0x63,
+	0x73, 0x74, 0x61, 0x74, 0x73, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x61, 0x6e, 0x64, 0x2e, 0x51, 0x75,
-	0x6f, 0x6d, 0x6d, 0x61, 0x6e, 0x64, 0x50, 0x01, 0x5a, 0x2b, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62,
+	0x65, 0x72, 0x79, 0x53, 0x74, 0x61, 0x74, 0x73, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a,
-	0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63,
+	0x2a, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x73, 0x74, 0x61, 0x74, 0x73,
-	0x6f, 0x72, 0x65, 0x2f, 0x61, 0x70, 0x70, 0x2f, 0x73, 0x74, 0x61, 0x74, 0x73, 0x2f, 0x63, 0x6f,
+	0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x61, 0x6e, 0x64, 0x2e, 0x51, 0x75, 0x65, 0x72, 0x79, 0x53, 0x74,
-	0x6d, 0x6d, 0x61, 0x6e, 0x64, 0xaa, 0x02, 0x16, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x41, 0x70, 0x70,
+	0x61, 0x74, 0x73, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x12, 0x62, 0x0a,
-	0x2e, 0x53, 0x74, 0x61, 0x74, 0x73, 0x2e, 0x43, 0x6f, 0x6d, 0x6d, 0x61, 0x6e, 0x64, 0x62, 0x06,
+	0x0b, 0x47, 0x65, 0x74, 0x53, 0x79, 0x73, 0x53, 0x74, 0x61, 0x74, 0x73, 0x12, 0x27, 0x2e, 0x78,
-	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70, 0x2e, 0x73, 0x74, 0x61, 0x74, 0x73, 0x2e, 0x63, 0x6f,
+	0x6d, 0x6d, 0x61, 0x6e, 0x64, 0x2e, 0x53, 0x79, 0x73, 0x53, 0x74, 0x61, 0x74, 0x73, 0x52, 0x65,
+	0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x28, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x61, 0x70, 0x70,
+	0x2e, 0x73, 0x74, 0x61, 0x74, 0x73, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x61, 0x6e, 0x64, 0x2e, 0x53,
+	0x79, 0x73, 0x53, 0x74, 0x61, 0x74, 0x73, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22,
+	0x00, 0x42, 0x64, 0x0a, 0x1a, 0x63, 0x6f, 0x6d, 0x2e, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x61, 0x70,
+	0x70, 0x2e, 0x73, 0x74, 0x61, 0x74, 0x73, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x61, 0x6e, 0x64, 0x50,
+	0x01, 0x5a, 0x2b, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74,
+	0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x61, 0x70, 0x70,
+	0x2f, 0x73, 0x74, 0x61, 0x74, 0x73, 0x2f, 0x63, 0x6f, 0x6d, 0x6d, 0x61, 0x6e, 0x64, 0xaa, 0x02,
+	0x16, 0x58, 0x72, 0x61, 0x79, 0x2e, 0x41, 0x70, 0x70, 0x2e, 0x53, 0x74, 0x61, 0x74, 0x73, 0x2e,
+	0x43, 0x6f, 0x6d, 0x6d, 0x61, 0x6e, 0x64, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -627,38 +554,33 @@ func file_app_stats_command_command_proto_rawDescGZIP() []byte {
 	return file_app_stats_command_command_proto_rawDescData
 }
 
-var file_app_stats_command_command_proto_msgTypes = make([]protoimpl.MessageInfo, 10)
+var file_app_stats_command_command_proto_msgTypes = make([]protoimpl.MessageInfo, 8)
 var file_app_stats_command_command_proto_goTypes = []any{
-	(*GetStatsRequest)(nil),              // 0: xray.app.stats.command.GetStatsRequest
+	(*GetStatsRequest)(nil),    // 0: xray.app.stats.command.GetStatsRequest
-	(*Stat)(nil),                         // 1: xray.app.stats.command.Stat
+	(*Stat)(nil),               // 1: xray.app.stats.command.Stat
-	(*GetStatsResponse)(nil),             // 2: xray.app.stats.command.GetStatsResponse
+	(*GetStatsResponse)(nil),   // 2: xray.app.stats.command.GetStatsResponse
-	(*QueryStatsRequest)(nil),            // 3: xray.app.stats.command.QueryStatsRequest
+	(*QueryStatsRequest)(nil),  // 3: xray.app.stats.command.QueryStatsRequest
-	(*QueryStatsResponse)(nil),           // 4: xray.app.stats.command.QueryStatsResponse
+	(*QueryStatsResponse)(nil), // 4: xray.app.stats.command.QueryStatsResponse
-	(*SysStatsRequest)(nil),              // 5: xray.app.stats.command.SysStatsRequest
+	(*SysStatsRequest)(nil),    // 5: xray.app.stats.command.SysStatsRequest
-	(*SysStatsResponse)(nil),             // 6: xray.app.stats.command.SysStatsResponse
+	(*SysStatsResponse)(nil),   // 6: xray.app.stats.command.SysStatsResponse
-	(*GetStatsOnlineIpListResponse)(nil), // 7: xray.app.stats.command.GetStatsOnlineIpListResponse
+	(*Config)(nil),             // 7: xray.app.stats.command.Config
-	(*Config)(nil),                       // 8: xray.app.stats.command.Config
-	nil,                                  // 9: xray.app.stats.command.GetStatsOnlineIpListResponse.IpsEntry
 }
 var file_app_stats_command_command_proto_depIdxs = []int32{
 	1, // 0: xray.app.stats.command.GetStatsResponse.stat:type_name -> xray.app.stats.command.Stat
 	1, // 1: xray.app.stats.command.QueryStatsResponse.stat:type_name -> xray.app.stats.command.Stat
-	9, // 2: xray.app.stats.command.GetStatsOnlineIpListResponse.ips:type_name -> xray.app.stats.command.GetStatsOnlineIpListResponse.IpsEntry
+	0, // 2: xray.app.stats.command.StatsService.GetStats:input_type -> xray.app.stats.command.GetStatsRequest
-	0, // 3: xray.app.stats.command.StatsService.GetStats:input_type -> xray.app.stats.command.GetStatsRequest
+	0, // 3: xray.app.stats.command.StatsService.GetStatsOnline:input_type -> xray.app.stats.command.GetStatsRequest
-	0, // 4: xray.app.stats.command.StatsService.GetStatsOnline:input_type -> xray.app.stats.command.GetStatsRequest
+	3, // 4: xray.app.stats.command.StatsService.QueryStats:input_type -> xray.app.stats.command.QueryStatsRequest
-	3, // 5: xray.app.stats.command.StatsService.QueryStats:input_type -> xray.app.stats.command.QueryStatsRequest
+	5, // 5: xray.app.stats.command.StatsService.GetSysStats:input_type -> xray.app.stats.command.SysStatsRequest
-	5, // 6: xray.app.stats.command.StatsService.GetSysStats:input_type -> xray.app.stats.command.SysStatsRequest
+	2, // 6: xray.app.stats.command.StatsService.GetStats:output_type -> xray.app.stats.command.GetStatsResponse
-	0, // 7: xray.app.stats.command.StatsService.GetStatsOnlineIpList:input_type -> xray.app.stats.command.GetStatsRequest
+	2, // 7: xray.app.stats.command.StatsService.GetStatsOnline:output_type -> xray.app.stats.command.GetStatsResponse
-	2, // 8: xray.app.stats.command.StatsService.GetStats:output_type -> xray.app.stats.command.GetStatsResponse
+	4, // 8: xray.app.stats.command.StatsService.QueryStats:output_type -> xray.app.stats.command.QueryStatsResponse
-	2, // 9: xray.app.stats.command.StatsService.GetStatsOnline:output_type -> xray.app.stats.command.GetStatsResponse
+	6, // 9: xray.app.stats.command.StatsService.GetSysStats:output_type -> xray.app.stats.command.SysStatsResponse
-	4, // 10: xray.app.stats.command.StatsService.QueryStats:output_type -> xray.app.stats.command.QueryStatsResponse
+	6, // [6:10] is the sub-list for method output_type
-	6, // 11: xray.app.stats.command.StatsService.GetSysStats:output_type -> xray.app.stats.command.SysStatsResponse
+	2, // [2:6] is the sub-list for method input_type
-	7, // 12: xray.app.stats.command.StatsService.GetStatsOnlineIpList:output_type -> xray.app.stats.command.GetStatsOnlineIpListResponse
+	2, // [2:2] is the sub-list for extension type_name
-	8, // [8:13] is the sub-list for method output_type
+	2, // [2:2] is the sub-list for extension extendee
-	3, // [3:8] is the sub-list for method input_type
+	0, // [0:2] is the sub-list for field type_name
-	3, // [3:3] is the sub-list for extension type_name
-	3, // [3:3] is the sub-list for extension extendee
-	0, // [0:3] is the sub-list for field type_name
 }
 
 func init() { file_app_stats_command_command_proto_init() }
@@ -672,7 +594,7 @@ func file_app_stats_command_command_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_app_stats_command_command_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   10,
+			NumMessages:   8,
 			NumExtensions: 0,
 			NumServices:   1,
 		},

app/stats/command/command.proto

@@ -46,17 +46,11 @@ message SysStatsResponse {
   uint32 Uptime = 10;
 }
 
-message GetStatsOnlineIpListResponse {
-  string name = 1;
-  map<string, int64> ips = 2;
-}
-
 service StatsService {
   rpc GetStats(GetStatsRequest) returns (GetStatsResponse) {}
   rpc GetStatsOnline(GetStatsRequest) returns (GetStatsResponse) {}
   rpc QueryStats(QueryStatsRequest) returns (QueryStatsResponse) {}
   rpc GetSysStats(SysStatsRequest) returns (SysStatsResponse) {}
-  rpc GetStatsOnlineIpList(GetStatsRequest) returns (GetStatsOnlineIpListResponse) {}
 }
 
 message Config {}

app/stats/command/command_grpc.pb.go

@@ -19,11 +19,10 @@ import (
 const _ = grpc.SupportPackageIsVersion9
 
 const (
-	StatsService_GetStats_FullMethodName             = "/xray.app.stats.command.StatsService/GetStats"
+	StatsService_GetStats_FullMethodName       = "/xray.app.stats.command.StatsService/GetStats"
-	StatsService_GetStatsOnline_FullMethodName       = "/xray.app.stats.command.StatsService/GetStatsOnline"
+	StatsService_GetStatsOnline_FullMethodName = "/xray.app.stats.command.StatsService/GetStatsOnline"
-	StatsService_QueryStats_FullMethodName           = "/xray.app.stats.command.StatsService/QueryStats"
+	StatsService_QueryStats_FullMethodName     = "/xray.app.stats.command.StatsService/QueryStats"
-	StatsService_GetSysStats_FullMethodName          = "/xray.app.stats.command.StatsService/GetSysStats"
+	StatsService_GetSysStats_FullMethodName    = "/xray.app.stats.command.StatsService/GetSysStats"
-	StatsService_GetStatsOnlineIpList_FullMethodName = "/xray.app.stats.command.StatsService/GetStatsOnlineIpList"
 )
 
 // StatsServiceClient is the client API for StatsService service.
@@ -34,7 +33,6 @@ type StatsServiceClient interface {
 	GetStatsOnline(ctx context.Context, in *GetStatsRequest, opts ...grpc.CallOption) (*GetStatsResponse, error)
 	QueryStats(ctx context.Context, in *QueryStatsRequest, opts ...grpc.CallOption) (*QueryStatsResponse, error)
 	GetSysStats(ctx context.Context, in *SysStatsRequest, opts ...grpc.CallOption) (*SysStatsResponse, error)
-	GetStatsOnlineIpList(ctx context.Context, in *GetStatsRequest, opts ...grpc.CallOption) (*GetStatsOnlineIpListResponse, error)
 }
 
 type statsServiceClient struct {
@@ -85,16 +83,6 @@ func (c *statsServiceClient) GetSysStats(ctx context.Context, in *SysStatsReques
 	return out, nil
 }
 
-func (c *statsServiceClient) GetStatsOnlineIpList(ctx context.Context, in *GetStatsRequest, opts ...grpc.CallOption) (*GetStatsOnlineIpListResponse, error) {
-	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
-	out := new(GetStatsOnlineIpListResponse)
-	err := c.cc.Invoke(ctx, StatsService_GetStatsOnlineIpList_FullMethodName, in, out, cOpts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
 // StatsServiceServer is the server API for StatsService service.
 // All implementations must embed UnimplementedStatsServiceServer
 // for forward compatibility.
@@ -103,7 +91,6 @@ type StatsServiceServer interface {
 	GetStatsOnline(context.Context, *GetStatsRequest) (*GetStatsResponse, error)
 	QueryStats(context.Context, *QueryStatsRequest) (*QueryStatsResponse, error)
 	GetSysStats(context.Context, *SysStatsRequest) (*SysStatsResponse, error)
-	GetStatsOnlineIpList(context.Context, *GetStatsRequest) (*GetStatsOnlineIpListResponse, error)
 	mustEmbedUnimplementedStatsServiceServer()
 }
 
@@ -126,9 +113,6 @@ func (UnimplementedStatsServiceServer) QueryStats(context.Context, *QueryStatsRe
 func (UnimplementedStatsServiceServer) GetSysStats(context.Context, *SysStatsRequest) (*SysStatsResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method GetSysStats not implemented")
 }
-func (UnimplementedStatsServiceServer) GetStatsOnlineIpList(context.Context, *GetStatsRequest) (*GetStatsOnlineIpListResponse, error) {
-	return nil, status.Errorf(codes.Unimplemented, "method GetStatsOnlineIpList not implemented")
-}
 func (UnimplementedStatsServiceServer) mustEmbedUnimplementedStatsServiceServer() {}
 func (UnimplementedStatsServiceServer) testEmbeddedByValue()                      {}
 
@@ -222,24 +206,6 @@ func _StatsService_GetSysStats_Handler(srv interface{}, ctx context.Context, dec
 	return interceptor(ctx, in, info, handler)
 }
 
-func _StatsService_GetStatsOnlineIpList_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(GetStatsRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(StatsServiceServer).GetStatsOnlineIpList(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: StatsService_GetStatsOnlineIpList_FullMethodName,
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(StatsServiceServer).GetStatsOnlineIpList(ctx, req.(*GetStatsRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
 // StatsService_ServiceDesc is the grpc.ServiceDesc for StatsService service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -263,10 +229,6 @@ var StatsService_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "GetSysStats",
 			Handler:    _StatsService_GetSysStats_Handler,
 		},
-		{
-			MethodName: "GetStatsOnlineIpList",
-			Handler:    _StatsService_GetStatsOnlineIpList_Handler,
-		},
 	},
 	Streams:  []grpc.StreamDesc{},
 	Metadata: "app/stats/command/command.proto",

app/stats/online_map.go

@@ -40,11 +40,11 @@ func (c *OnlineMap) AddIP(ip string) {
 	if ip == "127.0.0.1" {
 		return
 	}
-	c.access.Lock()
 	if _, ok := list[ip]; !ok {
+		c.access.Lock()
 		list[ip] = time.Now()
+		c.access.Unlock()
 	}
-	c.access.Unlock()
 	if time.Since(c.lastCleanup) > c.cleanupPeriod {
 		list = c.RemoveExpiredIPs(list)
 		c.lastCleanup = time.Now()
@@ -78,13 +78,3 @@ func (c *OnlineMap) RemoveExpiredIPs(list map[string]time.Time) map[string]time.
 	}
 	return list
 }
-
-func (c *OnlineMap) IpTimeMap() map[string]time.Time {
-	list := c.ipList
-	if time.Since(c.lastCleanup) > c.cleanupPeriod {
-		list = c.RemoveExpiredIPs(list)
-		c.lastCleanup = time.Now()
-	}
-
-	return c.ipList
-}

common/buf/buffer.go

@@ -13,19 +13,8 @@ const (
 	Size = 8192
 )
 
-var zero = [Size * 10]byte{0}
-
 var pool = bytespool.GetPool(Size)
 
-// ownership represents the data owner of the buffer.
-type ownership uint8
-
-const (
-	managed ownership = iota
-	unmanaged
-	bytespools
-)
-
 // Buffer is a recyclable allocation of a byte array. Buffer.Release() recycles
 // the buffer into an internal buffer pool, in order to recreate a buffer more
 // quickly.
@@ -33,11 +22,11 @@ type Buffer struct {
 	v         []byte
 	start     int32
 	end       int32
-	ownership ownership
+	unmanaged bool
 	UDP       *net.Destination
 }
 
-// New creates a Buffer with 0 length and 8K capacity, managed.
+// New creates a Buffer with 0 length and 8K capacity.
 func New() *Buffer {
 	buf := pool.Get().([]byte)
 	if cap(buf) >= Size {
@@ -51,7 +40,7 @@ func New() *Buffer {
 	}
 }
 
-// NewExisted creates a standard size Buffer with an existed bytearray, managed.
+// NewExisted creates a managed, standard size Buffer with an existed bytearray
 func NewExisted(b []byte) *Buffer {
 	if cap(b) < Size {
 		panic("Invalid buffer")
@@ -68,16 +57,16 @@ func NewExisted(b []byte) *Buffer {
 	}
 }
 
-// FromBytes creates a Buffer with an existed bytearray, unmanaged.
+// FromBytes creates a Buffer with an existed bytearray
 func FromBytes(b []byte) *Buffer {
 	return &Buffer{
 		v:         b,
 		end:       int32(len(b)),
-		ownership: unmanaged,
+		unmanaged: true,
 	}
 }
 
-// StackNew creates a new Buffer object on stack, managed.
+// StackNew creates a new Buffer object on stack.
 // This method is for buffers that is released in the same function.
 func StackNew() Buffer {
 	buf := pool.Get().([]byte)
@@ -92,17 +81,9 @@ func StackNew() Buffer {
 	}
 }
 
-// NewWithSize creates a Buffer with 0 length and capacity with at least the given size, bytespool's.
-func NewWithSize(size int32) *Buffer {
-	return &Buffer{
-		v:         bytespool.Alloc(size),
-		ownership: bytespools,
-	}
-}
-
 // Release recycles the buffer into an internal buffer pool.
 func (b *Buffer) Release() {
-	if b == nil || b.v == nil || b.ownership == unmanaged {
+	if b == nil || b.v == nil || b.unmanaged {
 		return
 	}
 
@@ -110,13 +91,8 @@ func (b *Buffer) Release() {
 	b.v = nil
 	b.Clear()
 
-	switch b.ownership {
+	if cap(p) == Size {
-	case managed:
+		pool.Put(p)
-		if cap(p) == Size {
-			pool.Put(p)
-		}
-	case bytespools:
-		bytespool.Free(p)
 	}
 	b.UDP = nil
 }
@@ -152,7 +128,6 @@ func (b *Buffer) Extend(n int32) []byte {
 	}
 	ext := b.v[b.end:end]
 	b.end = end
-	copy(ext, zero[:])
 	return ext
 }
 
@@ -201,7 +176,6 @@ func (b *Buffer) Check() {
 
 // Resize cuts the buffer at the given position.
 func (b *Buffer) Resize(from, to int32) {
-	oldEnd := b.end
 	if from < 0 {
 		from += b.Len()
 	}
@@ -214,9 +188,6 @@ func (b *Buffer) Resize(from, to int32) {
 	b.end = b.start + to
 	b.start += from
 	b.Check()
-	if b.end > oldEnd {
-		copy(b.v[oldEnd:b.end], zero[:])
-	}
 }
 
 // Advance cuts the buffer at the given position.
@@ -244,6 +215,13 @@ func (b *Buffer) Cap() int32 {
 	return int32(len(b.v))
 }
 
+// NewWithSize creates a Buffer with 0 length and capacity with at least the given size.
+func NewWithSize(size int32) *Buffer {
+	return &Buffer{
+		v: bytespool.Alloc(size),
+	}
+}
+
 // IsEmpty returns true if the buffer is empty.
 func (b *Buffer) IsEmpty() bool {
 	return b.Len() == 0

common/common.go

@@ -38,7 +38,7 @@ func Error2(v interface{}, err error) error {
 func envFile() (string, error) {
 	if file := os.Getenv("GOENV"); file != "" {
 		if file == "off" {
-			return "", errors.New("GOENV=off")
+			return "", fmt.Errorf("GOENV=off")
 		}
 		return file, nil
 	}
@@ -47,7 +47,7 @@ func envFile() (string, error) {
 		return "", err
 	}
 	if dir == "" {
-		return "", errors.New("missing user-config dir")
+		return "", fmt.Errorf("missing user-config dir")
 	}
 	return filepath.Join(dir, "go", "env"), nil
 }
@@ -60,7 +60,7 @@ func GetRuntimeEnv(key string) (string, error) {
 		return "", err
 	}
 	if file == "" {
-		return "", errors.New("missing runtime env file")
+		return "", fmt.Errorf("missing runtime env file")
 	}
 	var data []byte
 	var runtimeEnv string

common/crypto/crypto.go

@@ -1,15 +1,2 @@
 // Package crypto provides common crypto libraries for Xray.
 package crypto // import "github.com/xtls/xray-core/common/crypto"
-
-import (
-	"crypto/rand"
-	"math/big"
-)
-
-func RandBetween(from int64, to int64) int64 {
-	if from == to {
-		return from
-	}
-	bigInt, _ := rand.Int(rand.Reader, big.NewInt(to-from))
-	return from + bigInt.Int64()
-}

common/errors/multi_error.go

@@ -1,7 +1,6 @@
 package errors
 
 import (
-	"errors"
 	"strings"
 )
 
@@ -37,12 +36,12 @@ func AllEqual(expected error, actual error) bool {
 			return false
 		}
 		for _, err := range errs {
-			if !errors.Is(err, expected) {
+			if err != expected {
 				return false
 			}
 		}
 		return true
 	default:
-		return errors.Is(errs, expected)
+		return errs == expected
 	}
 }

common/log/logger.go

@@ -146,7 +146,7 @@ func (w *fileLogWriter) Close() error {
 func CreateStdoutLogWriter() WriterCreator {
 	return func() Writer {
 		return &consoleLogWriter{
-			logger: log.New(os.Stdout, "", log.Ldate|log.Ltime|log.Lmicroseconds),
+			logger: log.New(os.Stdout, "", log.Ldate|log.Ltime),
 		}
 	}
 }
@@ -155,7 +155,7 @@ func CreateStdoutLogWriter() WriterCreator {
 func CreateStderrLogWriter() WriterCreator {
 	return func() Writer {
 		return &consoleLogWriter{
-			logger: log.New(os.Stderr, "", log.Ldate|log.Ltime|log.Lmicroseconds),
+			logger: log.New(os.Stderr, "", log.Ldate|log.Ltime),
 		}
 	}
 }
@@ -174,7 +174,7 @@ func CreateFileLogWriter(path string) (WriterCreator, error) {
 		}
 		return &fileLogWriter{
 			file:   file,
-			logger: log.New(file, "", log.Ldate|log.Ltime|log.Lmicroseconds),
+			logger: log.New(file, "", log.Ldate|log.Ltime),
 		}
 	}, nil
 }

common/mux/server.go

@@ -120,7 +120,7 @@ func (w *ServerWorker) handleStatusKeepAlive(meta *FrameMetadata, reader *buf.Bu
 func (w *ServerWorker) handleStatusNew(ctx context.Context, meta *FrameMetadata, reader *buf.BufferedReader) error {
 	// deep-clone outbounds because it is going to be mutated concurrently
 	// (Target and OriginalTarget)
-	ctx = session.ContextCloneOutboundsAndContent(ctx)
+	ctx = session.ContextCloneOutbounds(ctx)
 	errors.LogInfo(ctx, "received request for ", meta.Target)
 	{
 		msg := &log.AccessMessage{

common/net/destination.go

@@ -89,10 +89,12 @@ func UnixDestination(address Address) Destination {
 // NetAddr returns the network address in this Destination in string form.
 func (d Destination) NetAddr() string {
 	addr := ""
-	if d.Network == Network_TCP || d.Network == Network_UDP {
+	if d.Address != nil {
-		addr = d.Address.String() + ":" + d.Port.String()
+		if d.Network == Network_TCP || d.Network == Network_UDP {
-	} else if d.Network == Network_UNIX {
+			addr = d.Address.String() + ":" + d.Port.String()
-		addr = d.Address.String()
+		} else if d.Network == Network_UNIX {
+			addr = d.Address.String()
+		}
 	}
 	return addr
 }

common/net/net.go

@@ -1,14 +1,2 @@
 // Package net is a drop-in replacement to Golang's net package, with some more functionalities.
 package net // import "github.com/xtls/xray-core/common/net"
-
-import "time"
-
-// defines the maximum time an idle TCP session can survive in the tunnel, so
-// it should be consistent across HTTP versions and with other transports.
-const ConnIdleTimeout = 300 * time.Second
-
-// consistent with quic-go
-const QuicgoH3KeepAlivePeriod = 10 * time.Second
-
-// consistent with chrome
-const ChromeH2KeepAlivePeriod = 45 * time.Second

common/net/system.go

@@ -76,9 +76,8 @@ type (
 )
 
 var (
-	ResolveTCPAddr  = net.ResolveTCPAddr
-	ResolveUDPAddr  = net.ResolveUDPAddr
 	ResolveUnixAddr = net.ResolveUnixAddr
+	ResolveUDPAddr  = net.ResolveUDPAddr
 )
 
 type Resolver = net.Resolver

common/platform/filesystem/file.go

@@ -3,7 +3,6 @@ package filesystem
 import (
 	"io"
 	"os"
-	"path/filepath"
 
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/platform"
@@ -29,13 +28,6 @@ func ReadAsset(file string) ([]byte, error) {
 	return ReadFile(platform.GetAssetLocation(file))
 }
 
-func ReadCert(file string) ([]byte, error) {
-	if filepath.IsAbs(file) {
-		return ReadFile(file)
-	}
-	return ReadFile(platform.GetCertLocation(file))
-}
-
 func CopyFile(dst string, src string) error {
 	bytes, err := ReadFile(src)
 	if err != nil {

common/platform/others.go

@@ -21,7 +21,7 @@ func GetToolLocation(file string) string {
 	return filepath.Join(toolPath, file)
 }
 
-// GetAssetLocation searches for `file` in the env dir, the executable dir, and certain locations
+// GetAssetLocation searches for `file` in certain locations
 func GetAssetLocation(file string) string {
 	assetPath := NewEnvFlag(AssetLocation).GetValue(getExecutableDir)
 	defPath := filepath.Join(assetPath, file)
@@ -42,9 +42,3 @@ func GetAssetLocation(file string) string {
 	// asset not found, let the caller throw out the error
 	return defPath
 }
-
-// GetCertLocation searches for `file` in the env dir and the executable dir
-func GetCertLocation(file string) string {
-	certPath := NewEnvFlag(CertLocation).GetValue(getExecutableDir)
-	return filepath.Join(certPath, file)
-}

common/platform/platform.go

@@ -13,7 +13,6 @@ const (
 	ConfdirLocation = "xray.location.confdir"
 	ToolLocation    = "xray.location.tool"
 	AssetLocation   = "xray.location.asset"
-	CertLocation    = "xray.location.cert"
 
 	UseReadV         = "xray.buf.readv"
 	UseFreedomSplice = "xray.buf.splice"

common/platform/windows.go

@@ -19,14 +19,8 @@ func GetToolLocation(file string) string {
 	return filepath.Join(toolPath, file+".exe")
 }
 
-// GetAssetLocation searches for `file` in the env dir and the executable dir
+// GetAssetLocation searches for `file` in the executable dir
 func GetAssetLocation(file string) string {
 	assetPath := NewEnvFlag(AssetLocation).GetValue(getExecutableDir)
 	return filepath.Join(assetPath, file)
 }
-
-// GetCertLocation searches for `file` in the env dir and the executable dir
-func GetCertLocation(file string) string {
-	certPath := NewEnvFlag(CertLocation).GetValue(getExecutableDir)
-	return filepath.Join(certPath, file)
-}

common/protocol/http/sniff.go

@@ -63,7 +63,7 @@ func SniffHTTP(b []byte, c context.Context) (*SniffHeader, error) {
 	ShouldSniffAttr := true
 	// If content.Attributes have information, that means it comes from HTTP inbound PlainHTTP mode.
 	// It will set attributes, so skip it.
-	if content == nil || len(content.Attributes) != 0 {
+	if content == nil || content.AttributeLen() != 0 {
 		ShouldSniffAttr = false
 	}
 	if err := beginWithHTTPMethod(b); err != nil {

common/protocol/protocol.go

@@ -1,7 +1 @@
 package protocol // import "github.com/xtls/xray-core/common/protocol"
-
-import (
-	"errors"
-)
-
-var ErrProtoNeedMoreData = errors.New("protocol matches, but need more data to complete sniffing")

common/protocol/quic/sniff.go

@@ -1,6 +1,7 @@
 package quic
 
 import (
+	"context"
 	"crypto"
 	"crypto/aes"
 	"crypto/tls"
@@ -10,8 +11,8 @@ import (
 	"github.com/quic-go/quic-go/quicvarint"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
+	"github.com/xtls/xray-core/common/bytespool"
 	"github.com/xtls/xray-core/common/errors"
-	"github.com/xtls/xray-core/common/protocol"
 	ptls "github.com/xtls/xray-core/common/protocol/tls"
 	"golang.org/x/crypto/hkdf"
 )
@@ -46,17 +47,22 @@ var (
 	errNotQuicInitial = errors.New("not initial packet")
 )
 
-func SniffQUIC(b []byte) (*SniffHeader, error) {
+func SniffQUIC(b []byte) (resultReturn *SniffHeader, errorReturn error) {
-	if len(b) == 0 {
+	// In extremely rare cases, this sniffer may cause slice error
-		return nil, common.ErrNoClue
+	// and we set recover() here to prevent crash.
-	}
+	// TODO: Thoroughly fix this panic
+	defer func() {
+		if r := recover(); r != nil {
+			errors.LogError(context.Background(), "Failed to sniff QUIC: ", r)
+			resultReturn = nil
+			errorReturn = common.ErrNoClue
+		}
+	}()
 
 	// Crypto data separated across packets
-	cryptoLen := int32(0)
+	cryptoLen := 0
-	cryptoDataBuf := buf.NewWithSize(32767)
+	cryptoData := bytespool.Alloc(int32(len(b)))
-	defer cryptoDataBuf.Release()
+	defer bytespool.Free(cryptoData)
-	cache := buf.New()
-	defer cache.Release()
 
 	// Parse QUIC packets
 	for len(b) > 0 {
@@ -99,15 +105,13 @@ func SniffQUIC(b []byte) (*SniffHeader, error) {
 			return nil, errNotQuic
 		}
 
-		if isQuicInitial { // Only initial packets have token, see https://datatracker.ietf.org/doc/html/rfc9000#section-17.2.2
+		tokenLen, err := quicvarint.Read(buffer)
-			tokenLen, err := quicvarint.Read(buffer)
+		if err != nil || tokenLen > uint64(len(b)) {
-			if err != nil || tokenLen > uint64(len(b)) {
+			return nil, errNotQuic
-				return nil, errNotQuic
+		}
-			}
 
-			if _, err = buffer.ReadBytes(int32(tokenLen)); err != nil {
+		if _, err = buffer.ReadBytes(int32(tokenLen)); err != nil {
-				return nil, errNotQuic
+			return nil, errNotQuic
-			}
 		}
 
 		packetLen, err := quicvarint.Read(buffer)
@@ -126,6 +130,9 @@ func SniffQUIC(b []byte) (*SniffHeader, error) {
 			continue
 		}
 
+		origPNBytes := make([]byte, 4)
+		copy(origPNBytes, b[hdrLen:hdrLen+4])
+
 		var salt []byte
 		if versionNumber == version1 {
 			salt = quicSalt
@@ -140,34 +147,44 @@ func SniffQUIC(b []byte) (*SniffHeader, error) {
 			return nil, err
 		}
 
-		cache.Clear()
+		cache := buf.New()
+		defer cache.Release()
+
 		mask := cache.Extend(int32(block.BlockSize()))
-		block.Encrypt(mask, b[hdrLen+4:hdrLen+4+len(mask)])
+		block.Encrypt(mask, b[hdrLen+4:hdrLen+4+16])
 		b[0] ^= mask[0] & 0xf
-		packetNumberLength := int(b[0]&0x3 + 1)
+		for i := range b[hdrLen : hdrLen+4] {
-		for i := range packetNumberLength {
 			b[hdrLen+i] ^= mask[i+1]
 		}
+		packetNumberLength := b[0]&0x3 + 1
+		if packetNumberLength != 1 {
+			return nil, errNotQuicInitial
+		}
+		var packetNumber uint32
+		{
+			n, err := buffer.ReadByte()
+			if err != nil {
+				return nil, err
+			}
+			packetNumber = uint32(n)
+		}
+
+		extHdrLen := hdrLen + int(packetNumberLength)
+		copy(b[extHdrLen:hdrLen+4], origPNBytes[packetNumberLength:])
+		data := b[extHdrLen : int(packetLen)+hdrLen]
 
 		key := hkdfExpandLabel(crypto.SHA256, secret, []byte{}, "quic key", 16)
 		iv := hkdfExpandLabel(crypto.SHA256, secret, []byte{}, "quic iv", 12)
 		cipher := AEADAESGCMTLS13(key, iv)
-
 		nonce := cache.Extend(int32(cipher.NonceSize()))
-		_, err = buffer.Read(nonce[len(nonce)-packetNumberLength:])
+		binary.BigEndian.PutUint64(nonce[len(nonce)-8:], uint64(packetNumber))
-		if err != nil {
-			return nil, err
-		}
-
-		extHdrLen := hdrLen + packetNumberLength
-		data := b[extHdrLen : int(packetLen)+hdrLen]
 		decrypted, err := cipher.Open(b[extHdrLen:extHdrLen], nonce, data, b[:extHdrLen])
 		if err != nil {
 			return nil, err
 		}
 		buffer = buf.FromBytes(decrypted)
-		for !buffer.IsEmpty() {
+		for i := 0; !buffer.IsEmpty(); i++ {
-			frameType, _ := buffer.ReadByte()
+			frameType := byte(0x0) // Default to PADDING frame
 			for frameType == 0x0 && !buffer.IsEmpty() {
 				frameType, _ = buffer.ReadByte()
 			}
@@ -216,15 +233,16 @@ func SniffQUIC(b []byte) (*SniffHeader, error) {
 				if err != nil || length > uint64(buffer.Len()) {
 					return nil, io.ErrUnexpectedEOF
 				}
-				currentCryptoLen := int32(offset + length)
+				if cryptoLen < int(offset+length) {
-				if cryptoLen < currentCryptoLen {
+					cryptoLen = int(offset + length)
-					if cryptoDataBuf.Cap() < currentCryptoLen {
+					if len(cryptoData) < cryptoLen {
-						return nil, io.ErrShortBuffer
+						newCryptoData := bytespool.Alloc(int32(cryptoLen))
+						copy(newCryptoData, cryptoData)
+						bytespool.Free(cryptoData)
+						cryptoData = newCryptoData
 					}
-					cryptoDataBuf.Extend(currentCryptoLen - cryptoLen)
-					cryptoLen = currentCryptoLen
 				}
-				if _, err := buffer.Read(cryptoDataBuf.BytesRange(int32(offset), currentCryptoLen)); err != nil { // Field: Crypto Data
+				if _, err := buffer.Read(cryptoData[offset : offset+length]); err != nil { // Field: Crypto Data
 					return nil, io.ErrUnexpectedEOF
 				}
 			case 0x1c: // CONNECTION_CLOSE frame, only 0x1c is permitted in initial packet
@@ -249,7 +267,7 @@ func SniffQUIC(b []byte) (*SniffHeader, error) {
 		}
 
 		tlsHdr := &ptls.SniffHeader{}
-		err = ptls.ReadClientHello(cryptoDataBuf.BytesRange(0, cryptoLen), tlsHdr)
+		err = ptls.ReadClientHello(cryptoData[:cryptoLen], tlsHdr)
 		if err != nil {
 			// The crypto data may have not been fully recovered in current packets,
 			// So we continue to sniff rest packets.
@@ -258,8 +276,7 @@ func SniffQUIC(b []byte) (*SniffHeader, error) {
 		}
 		return &SniffHeader{domain: tlsHdr.Domain()}, nil
 	}
-	// All payload is parsed as valid QUIC packets, but we need more packets for crypto data to read client hello.
+	return nil, common.ErrNoClue
-	return nil, protocol.ErrProtoNeedMoreData
 }
 
 func hkdfExpandLabel(hash crypto.Hash, secret, context []byte, label string, length int) []byte {

common/protocol/tls/cert/.gitignore

@@ -0,0 +1 @@
+*.pem

common/protocol/tls/cert/cert_test.go

@@ -78,9 +78,9 @@ func printJSON(certificate *Certificate) {
 func printFile(certificate *Certificate, name string) error {
 	certPEM, keyPEM := certificate.ToPEM()
 	return task.Run(context.Background(), func() error {
-		return writeFile(certPEM, name+".crt")
+		return writeFile(certPEM, name+"_cert.pem")
 	}, func() error {
-		return writeFile(keyPEM, name+".key")
+		return writeFile(keyPEM, name+"_key.pem")
 	})
 }
 

common/protocol/tls/sniff.go

@@ -3,9 +3,9 @@ package tls
 import (
 	"encoding/binary"
 	"errors"
+	"strings"
 
 	"github.com/xtls/xray-core/common"
-	"github.com/xtls/xray-core/common/protocol"
 )
 
 type SniffHeader struct {
@@ -59,6 +59,9 @@ func ReadClientHello(data []byte, h *SniffHeader) error {
 	}
 	data = data[1+compressionMethodsLen:]
 
+	if len(data) == 0 {
+		return errNotClientHello
+	}
 	if len(data) < 2 {
 		return errNotClientHello
 	}
@@ -101,21 +104,13 @@ func ReadClientHello(data []byte, h *SniffHeader) error {
 					return errNotClientHello
 				}
 				if nameType == 0 {
-					// QUIC separated across packets
+					serverName := string(d[:nameLen])
-					// May cause the serverName to be incomplete
-					b := byte(0)
-					for _, b = range d[:nameLen] {
-						if b <= ' ' {
-							return protocol.ErrProtoNeedMoreData
-						}
-					}
 					// An SNI value may not include a
 					// trailing dot. See
 					// https://tools.ietf.org/html/rfc6066#section-3.
-					if b == '.' {
+					if strings.HasSuffix(serverName, ".") {
 						return errNotClientHello
 					}
-					serverName := string(d[:nameLen])
 					h.domain = serverName
 					return nil
 				}

common/reflect/marshal.go

@@ -58,9 +58,7 @@ func marshalSlice(v reflect.Value, ignoreNullValue bool, insertTypeInfo bool) in
 }
 
 func isNullValue(f reflect.StructField, rv reflect.Value) bool {
-	if rv.Kind() == reflect.Struct {
+	if rv.Kind() == reflect.String && rv.Len() == 0 {
-		return false
-	} else if rv.Kind() == reflect.String && rv.Len() == 0 {
 		return true
 	} else if !isValueKind(rv.Kind()) && rv.IsNil() {
 		return true
@@ -186,12 +184,6 @@ func marshalKnownType(v interface{}, ignoreNullValue bool, insertTypeInfo bool)
 	case *conf.PortList:
 		cpl := v.(*conf.PortList)
 		return serializePortList(cpl.Build())
-	case conf.Int32Range:
-		i32rng := v.(conf.Int32Range)
-		if i32rng.Left == i32rng.Right {
-			return i32rng.Left, true
-		}
-		return i32rng.String(), true
 	case cnet.Address:
 		if addr := v.(cnet.Address); addr != nil {
 			return addr.String(), true

common/reflect/marshal_test.go

@@ -116,129 +116,100 @@ func TestMarshalConfigJson(t *testing.T) {
 		"system",
 		"inboundDownlink",
 		"outboundUplink",
-		"XHTTP_IN",
-		"\"host\": \"bing.com\"",
-		"scMaxEachPostBytes",
-		"\"from\": 100",
-		"\"to\": 1000",
-		"\"from\": 1000000",
-		"\"to\": 1000000",
 	}
 	for _, kw := range keywords {
 		if !strings.Contains(tc, kw) {
-			t.Log("config.json:", tc)
+			t.Error("marshaled config error")
-			t.Error("keyword not found:", kw)
-			break
 		}
 	}
 }
 
 func getConfig() string {
 	return `{
-  "log": {
+		"log": {
-    "loglevel": "debug"
+		  "loglevel": "debug"
-  },
+		},
-  "stats": {},
+		"stats": {},
-  "policy": {
+		"policy": {
-    "levels": {
+		  "levels": {
-      "0": {
+			"0": {
-        "statsUserUplink": true,
+			  "statsUserUplink": true,
-        "statsUserDownlink": true
+			  "statsUserDownlink": true
-      }
+			}
-    },
+		  },
-    "system": {
+		  "system": {
-      "statsInboundUplink": true,
+			"statsInboundUplink": true,
-      "statsInboundDownlink": true,
+			"statsInboundDownlink": true,
-      "statsOutboundUplink": true,
+			"statsOutboundUplink": true,
-      "statsOutboundDownlink": true
+			"statsOutboundDownlink": true
-    }
+		  }
-  },
+		},
-  "inbounds": [
+		"inbounds": [
-    {
+		  {
-      "tag": "agentin",
+			"tag": "agentin",
-      "protocol": "http",
+			"protocol": "http",
-      "port": 18080,
+			"port": 8080,
-      "listen": "127.0.0.1",
+			"listen": "127.0.0.1",
-      "settings": {}
+			"settings": {}
-    },
+		  },
-    {
+		  {
-      "listen": "127.0.0.1",
+			"listen": "127.0.0.1",
-      "port": 10085,
+			"port": 10085,
-      "protocol": "dokodemo-door",
+			"protocol": "dokodemo-door",
-      "settings": {
+			"settings": {
-        "address": "127.0.0.1"
+			  "address": "127.0.0.1"
-      },
+			},
-      "tag": "api-in"
+			"tag": "api-in"
-    }
+		  }
-  ],
+		],
-  "api": {
+		"api": {
-    "tag": "api",
+		  "tag": "api",
-    "services": [
+		  "services": [
-      "HandlerService",
+			"HandlerService",
-      "StatsService"
+			"StatsService"
-    ]
+		  ]
-  },
+		},
-  "routing": {
+		"routing": {
-    "rules": [
+		  "rules": [
-      {
+			{
-        "inboundTag": [
+			  "inboundTag": [
-          "api-in"
+				"api-in"
-        ],
+			  ],
-        "outboundTag": "api",
+			  "outboundTag": "api",
-        "type": "field"
+			  "type": "field"
-      }
+			}
-    ],
+		  ],
-    "domainStrategy": "AsIs"
+		  "domainStrategy": "AsIs"
-  },
+		},
-  "outbounds": [
+		"outbounds": [
-    {
+		  {
-      "protocol": "vless",
+			"protocol": "vless",
-      "settings": {
+			"settings": {
-        "vnext": [
+			  "vnext": [
-          {
+				{
-            "address": "1.2.3.4",
+				  "address": "1.2.3.4",
-            "port": 1234,
+				  "port": 1234,
-            "users": [
+				  "users": [
-              {
+					{
-                "id": "4784f9b8-a879-4fec-9718-ebddefa47750",
+					  "id": "4784f9b8-a879-4fec-9718-ebddefa47750",
-                "encryption": "none"
+					  "encryption": "none"
-              }
+					}
-            ]
+				  ]
-          }
+				}
-        ]
+			  ]
-      },
+			},
-      "tag": "XHTTP_IN",
+			"tag": "agentout",
-      "streamSettings": {
+			"streamSettings": {
-        "network": "xhttp",
+			  "network": "ws",
-        "xhttpSettings": {
+			  "security": "none",
-          "host": "bing.com",
+			  "wsSettings": {
-          "path": "/xhttp_client_upload",
+				"path": "/?ed=2048",
-          "mode": "auto",
+				"headers": {
-          "extra": {
+				  "Host": "bing.com"
-            "noSSEHeader": false,
+				}
-            "scMaxEachPostBytes": 1000000,
+			  }
-            "scMaxBufferedPosts": 30,
+			}
-            "xPaddingBytes": "100-1000"
+		  }
-          }
+		]
-        },
+	  }`
-        "sockopt": {
-          "tcpFastOpen": true,
-          "acceptProxyProtocol": false,
-          "tcpcongestion": "bbr",
-          "tcpMptcp": true
-        }
-      },
-      "sniffing": {
-        "enabled": true,
-        "destOverride": [
-          "http",
-          "tls",
-          "quic"
-        ],
-        "metadataOnly": false,
-        "routeOnly": true
-      }
-    }
-  ]
-}`
 }

common/session/context.go

@@ -23,8 +23,6 @@ const (
 	timeoutOnlyKey            ctx.SessionKey = 8
 	allowedNetworkKey         ctx.SessionKey = 9
 	handlerSessionKey         ctx.SessionKey = 10
-	mitmAlpn11Key             ctx.SessionKey = 11
-	mitmServerNameKey         ctx.SessionKey = 12
 )
 
 func ContextWithInbound(ctx context.Context, inbound *Inbound) context.Context {
@@ -42,7 +40,7 @@ func ContextWithOutbounds(ctx context.Context, outbounds []*Outbound) context.Co
 	return context.WithValue(ctx, outboundSessionKey, outbounds)
 }
 
-func ContextCloneOutboundsAndContent(ctx context.Context) context.Context {
+func ContextCloneOutbounds(ctx context.Context) context.Context {
 	outbounds := OutboundsFromContext(ctx)
 	newOutbounds := make([]*Outbound, len(outbounds))
 	for i, ob := range outbounds {
@@ -55,15 +53,7 @@ func ContextCloneOutboundsAndContent(ctx context.Context) context.Context {
 		newOutbounds[i] = &v
 	}
 
-	content := ContentFromContext(ctx)
+	return ContextWithOutbounds(ctx, newOutbounds)
-	newContent := Content{}
-	if content != nil {
-		newContent = *content
-		if content.Attributes != nil {
-			panic("content.Attributes != nil")
-		}
-	}
-	return ContextWithContent(ContextWithOutbounds(ctx, newOutbounds), &newContent)
 }
 
 func OutboundsFromContext(ctx context.Context) []*Outbound {
@@ -172,25 +162,3 @@ func AllowedNetworkFromContext(ctx context.Context) net.Network {
 	}
 	return net.Network_Unknown
 }
-
-func ContextWithMitmAlpn11(ctx context.Context, alpn11 bool) context.Context {
-	return context.WithValue(ctx, mitmAlpn11Key, alpn11)
-}
-
-func MitmAlpn11FromContext(ctx context.Context) bool {
-	if val, ok := ctx.Value(mitmAlpn11Key).(bool); ok {
-		return val
-	}
-	return false
-}
-
-func ContextWithMitmServerName(ctx context.Context, serverName string) context.Context {
-	return context.WithValue(ctx, mitmServerNameKey, serverName)
-}
-
-func MitmServerNameFromContext(ctx context.Context) string {
-	if val, ok := ctx.Value(mitmServerNameKey).(string); ok {
-		return val
-	}
-	return ""
-}

common/session/session.go

@@ -4,6 +4,7 @@ package session // import "github.com/xtls/xray-core/common/session"
 import (
 	"context"
 	"math/rand"
+	"sync"
 
 	c "github.com/xtls/xray-core/common/ctx"
 	"github.com/xtls/xray-core/common/errors"
@@ -74,8 +75,8 @@ type Outbound struct {
 
 // SniffingRequest controls the behavior of content sniffing.
 type SniffingRequest struct {
-	ExcludeForDomain               []string // read-only once set
+	ExcludeForDomain               []string
-	OverrideDestinationForProtocol []string // read-only once set
+	OverrideDestinationForProtocol []string
 	Enabled                        bool
 	MetadataOnly                   bool
 	RouteOnly                      bool
@@ -91,6 +92,10 @@ type Content struct {
 	Attributes map[string]string
 
 	SkipDNSResolve bool
+
+	mu sync.Mutex
+
+	isLocked bool
 }
 
 // Sockopt is the settings for socket connection.
@@ -99,8 +104,22 @@ type Sockopt struct {
 	Mark int32
 }
 
+// Some how when using mux, there will be a same ctx between different requests
+// This will cause problem as it's designed for single request, like concurrent map writes
+// Add a Mutex as a temp solution
+
 // SetAttribute attaches additional string attributes to content.
 func (c *Content) SetAttribute(name string, value string) {
+	if c.isLocked {
+		errors.LogError(context.Background(), "Multiple goroutines are tring to access one routing content, tring to write ", name, ":", value)
+	}
+	c.mu.Lock()
+	c.isLocked = true
+	defer func() {
+		c.isLocked = false
+		c.mu.Unlock()
+	}()
+
 	if c.Attributes == nil {
 		c.Attributes = make(map[string]string)
 	}
@@ -109,8 +128,24 @@ func (c *Content) SetAttribute(name string, value string) {
 
 // Attribute retrieves additional string attributes from content.
 func (c *Content) Attribute(name string) string {
+	c.mu.Lock()
+	c.isLocked = true
+	defer func() {
+		c.isLocked = false
+		c.mu.Unlock()
+	}()
 	if c.Attributes == nil {
 		return ""
 	}
 	return c.Attributes[name]
 }
+
+func (c *Content) AttributeLen() int {
+	c.mu.Lock()
+	c.isLocked = true
+	defer func() {
+		c.isLocked = false
+		c.mu.Unlock()
+	}()
+	return len(c.Attributes)
+}

core/config.go

@@ -2,7 +2,6 @@ package core
 
 import (
 	"io"
-	"slices"
 	"strings"
 
 	"github.com/xtls/xray-core/common"
@@ -65,11 +64,14 @@ func GetMergedConfig(args cmdarg.Arg) (string, error) {
 	supported := []string{"json", "yaml", "toml"}
 	for _, file := range args {
 		format := getFormat(file)
-		if slices.Contains(supported, format) {
+		for _, s := range supported {
-			files = append(files, &ConfigSource{
+			if s == format {
-				Name:   file,
+				files = append(files, &ConfigSource{
-				Format: format,
+					Name:   file,
-			})
+					Format: format,
+				})
+				break
+			}
 		}
 	}
 	return ConfigMergedFormFiles(files)

core/core.go

@@ -17,9 +17,9 @@ import (
 )
 
 var (
-	Version_x byte = 25
+	Version_x byte = 24
-	Version_y byte = 4
+	Version_y byte = 11
-	Version_z byte = 30
+	Version_z byte = 21
 )
 
 var (

core/xray.go

@@ -44,13 +44,22 @@ func getFeature(allFeatures []features.Feature, t reflect.Type) features.Feature
 	return nil
 }
 
-func (r *resolution) callbackResolution(allFeatures []features.Feature) error {
+func (r *resolution) resolve(allFeatures []features.Feature) (bool, error) {
+	var fs []features.Feature
+	for _, d := range r.deps {
+		f := getFeature(allFeatures, d)
+		if f == nil {
+			return false, nil
+		}
+		fs = append(fs, f)
+	}
+
 	callback := reflect.ValueOf(r.callback)
 	var input []reflect.Value
 	callbackType := callback.Type()
 	for i := 0; i < callbackType.NumIn(); i++ {
 		pt := callbackType.In(i)
-		for _, f := range allFeatures {
+		for _, f := range fs {
 			if reflect.TypeOf(f).AssignableTo(pt) {
 				input = append(input, reflect.ValueOf(f))
 				break
@@ -75,17 +84,15 @@ func (r *resolution) callbackResolution(allFeatures []features.Feature) error {
 		}
 	}
 
-	return err
+	return true, err
 }
 
 // Instance combines all Xray features.
 type Instance struct {
-	statusLock                 sync.Mutex
+	access             sync.Mutex
-	features                   []features.Feature
+	features           []features.Feature
-	pendingResolutions         []resolution
+	featureResolutions []resolution
-	pendingOptionalResolutions []resolution
+	running            bool
-	running                    bool
-	resolveLock                sync.Mutex
 
 	ctx context.Context
 }
@@ -146,14 +153,7 @@ func addOutboundHandlers(server *Instance, configs []*OutboundHandlerConfig) err
 // See Instance.RequireFeatures for more information.
 func RequireFeatures(ctx context.Context, callback interface{}) error {
 	v := MustFromContext(ctx)
-	return v.RequireFeatures(callback, false)
+	return v.RequireFeatures(callback)
-}
-
-// OptionalFeatures is a helper function to aquire features from Instance in context.
-// See Instance.RequireFeatures for more information.
-func OptionalFeatures(ctx context.Context, callback interface{}) error {
-	v := MustFromContext(ctx)
-	return v.RequireFeatures(callback, true)
 }
 
 // New returns a new Xray instance based on given configuration.
@@ -227,12 +227,9 @@ func initInstanceWithConfig(config *Config, server *Instance) (bool, error) {
 		}(),
 	)
 
-	server.resolveLock.Lock()
+	if server.featureResolutions != nil {
-	if server.pendingResolutions != nil {
-		server.resolveLock.Unlock()
 		return true, errors.New("not all dependencies are resolved.")
 	}
-	server.resolveLock.Unlock()
 
 	if err := addInboundHandlers(server, config.Inbound); err != nil {
 		return true, err
@@ -251,8 +248,8 @@ func (s *Instance) Type() interface{} {
 
 // Close shutdown the Xray instance.
 func (s *Instance) Close() error {
-	s.statusLock.Lock()
+	s.access.Lock()
-	defer s.statusLock.Unlock()
+	defer s.access.Unlock()
 
 	s.running = false
 
@@ -271,7 +268,7 @@ func (s *Instance) Close() error {
 
 // RequireFeatures registers a callback, which will be called when all dependent features are registered.
 // The callback must be a func(). All its parameters must be features.Feature.
-func (s *Instance) RequireFeatures(callback interface{}, optional bool) error {
+func (s *Instance) RequireFeatures(callback interface{}) error {
 	callbackType := reflect.TypeOf(callback)
 	if callbackType.Kind() != reflect.Func {
 		panic("not a function")
@@ -286,32 +283,17 @@ func (s *Instance) RequireFeatures(callback interface{}, optional bool) error {
 		deps:     featureTypes,
 		callback: callback,
 	}
-
+	if finished, err := r.resolve(s.features); finished {
-	s.resolveLock.Lock()
+		return err
-	foundAll := true
-	for _, d := range r.deps {
-		f := getFeature(s.features, d)
-		if f == nil {
-			foundAll = false
-			break
-		}
-	}
-	if foundAll {
-		s.resolveLock.Unlock()
-		return r.callbackResolution(s.features)
-	} else {
-		if optional {
-			s.pendingOptionalResolutions = append(s.pendingOptionalResolutions, r)
-		} else {
-			s.pendingResolutions = append(s.pendingResolutions, r)
-		}
-		s.resolveLock.Unlock()
-		return nil
 	}
+	s.featureResolutions = append(s.featureResolutions, r)
+	return nil
 }
 
 // AddFeature registers a feature into current Instance.
 func (s *Instance) AddFeature(feature features.Feature) error {
+	s.features = append(s.features, feature)
+
 	if s.running {
 		if err := feature.Start(); err != nil {
 			errors.LogInfoInner(s.ctx, err, "failed to start feature")
@@ -319,52 +301,27 @@ func (s *Instance) AddFeature(feature features.Feature) error {
 		return nil
 	}
 
-	s.resolveLock.Lock()
+	if s.featureResolutions == nil {
-	s.features = append(s.features, feature)
+		return nil
+	}
 
-	var availableResolution []resolution
+	var pendingResolutions []resolution
-	var pending []resolution
+	for _, r := range s.featureResolutions {
-	for _, r := range s.pendingResolutions {
+		finished, err := r.resolve(s.features)
-		foundAll := true
+		if finished && err != nil {
-		for _, d := range r.deps {
+			return err
-			f := getFeature(s.features, d)
-			if f == nil {
-				foundAll = false
-				break
-			}
 		}
-		if foundAll {
+		if !finished {
-			availableResolution = append(availableResolution, r)
+			pendingResolutions = append(pendingResolutions, r)
-		} else {
-			pending = append(pending, r)
 		}
 	}
-	s.pendingResolutions = pending
+	if len(pendingResolutions) == 0 {
-
+		s.featureResolutions = nil
-	var pendingOptional []resolution
+	} else if len(pendingResolutions) < len(s.featureResolutions) {
-	for _, r := range s.pendingOptionalResolutions {
+		s.featureResolutions = pendingResolutions
-		foundAll := true
-		for _, d := range r.deps {
-			f := getFeature(s.features, d)
-			if f == nil {
-				foundAll = false
-				break
-			}
-		}
-		if foundAll {
-			availableResolution = append(availableResolution, r)
-		} else {
-			pendingOptional = append(pendingOptional, r)
-		}
 	}
-	s.pendingOptionalResolutions = pendingOptional
-	s.resolveLock.Unlock()
 
-	var err error
+	return nil
-	for _, r := range availableResolution {
-		err = r.callbackResolution(s.features) // only return the last error for now
-	}
-	return err
 }
 
 // GetFeature returns a feature of the given type, or nil if such feature is not registered.
@@ -377,8 +334,8 @@ func (s *Instance) GetFeature(featureType interface{}) features.Feature {
 //
 // xray:api:stable
 func (s *Instance) Start() error {
-	s.statusLock.Lock()
+	s.access.Lock()
-	defer s.statusLock.Unlock()
+	defer s.access.Unlock()
 
 	s.running = true
 	for _, f := range s.features {

core/xray_test.go

@@ -30,7 +30,7 @@ func TestXrayDependency(t *testing.T) {
 			t.Error("expected dns client fulfilled, but actually nil")
 		}
 		wait <- true
-	}, false)
+	})
 	instance.AddFeature(localdns.New())
 	<-wait
 }

features/dns/client.go

@@ -21,7 +21,7 @@ type Client interface {
 	features.Feature
 
 	// LookupIP returns IP address for the given domain. IPs may contain IPv4 and/or IPv6 addresses.
-	LookupIP(domain string, option IPOption) ([]net.IP, uint32, error)
+	LookupIP(domain string, option IPOption) ([]net.IP, error)
 }
 
 type HostsLookup interface {
@@ -38,8 +38,6 @@ func ClientType() interface{} {
 // ErrEmptyResponse indicates that DNS query succeeded but no answer was returned.
 var ErrEmptyResponse = errors.New("empty response")
 
-const DefaultTTL = 300
-
 type RCodeError uint16
 
 func (e RCodeError) Error() string {

features/dns/localdns/client.go

@@ -20,44 +20,41 @@ func (*Client) Start() error { return nil }
 func (*Client) Close() error { return nil }
 
 // LookupIP implements Client.
-func (*Client) LookupIP(host string, option dns.IPOption) ([]net.IP, uint32, error) {
+func (*Client) LookupIP(host string, option dns.IPOption) ([]net.IP, error) {
 	ips, err := net.LookupIP(host)
 	if err != nil {
-		return nil, 0, err
+		return nil, err
 	}
 	parsedIPs := make([]net.IP, 0, len(ips))
 	ipv4 := make([]net.IP, 0, len(ips))
 	ipv6 := make([]net.IP, 0, len(ips))
 	for _, ip := range ips {
 		parsed := net.IPAddress(ip)
-		if parsed == nil {
+		if parsed != nil {
-			continue
+			parsedIPs = append(parsedIPs, parsed.IP())
 		}
-		parsedIP := parsed.IP()
+		if len(ip) == net.IPv4len {
-		parsedIPs = append(parsedIPs, parsedIP)
+			ipv4 = append(ipv4, ip)
-
+		}
-		if len(parsedIP) == net.IPv4len {
+		if len(ip) == net.IPv6len {
-			ipv4 = append(ipv4, parsedIP)
+			ipv6 = append(ipv6, ip)
-		} else {
-			ipv6 = append(ipv6, parsedIP)
 		}
 	}
-
 	switch {
 	case option.IPv4Enable && option.IPv6Enable:
 		if len(parsedIPs) > 0 {
-			return parsedIPs, dns.DefaultTTL, nil
+			return parsedIPs, nil
 		}
 	case option.IPv4Enable:
 		if len(ipv4) > 0 {
-			return ipv4, dns.DefaultTTL, nil
+			return ipv4, nil
 		}
 	case option.IPv6Enable:
 		if len(ipv6) > 0 {
-			return ipv6, dns.DefaultTTL, nil
+			return ipv6, nil
 		}
 	}
-	return nil, 0, dns.ErrEmptyResponse
+	return nil, dns.ErrEmptyResponse
 }
 
 // New create a new dns.Client that queries localhost for DNS.

features/inbound/inbound.go

@@ -25,7 +25,7 @@ type Handler interface {
 // xray:api:stable
 type Manager interface {
 	features.Feature
-	// GetHandler returns an InboundHandler for the given tag.
+	// GetHandlers returns an InboundHandler for the given tag.
 	GetHandler(ctx context.Context, tag string) (Handler, error)
 	// AddHandler adds the given handler into this Manager.
 	AddHandler(ctx context.Context, handler Handler) error

features/routing/context.go

@@ -11,7 +11,7 @@ type Context interface {
 	// GetInboundTag returns the tag of the inbound the connection was from.
 	GetInboundTag() string
 
-	// GetSourceIPs returns the source IPs bound to the connection.
+	// GetSourcesIPs returns the source IPs bound to the connection.
 	GetSourceIPs() []net.IP
 
 	// GetSourcePort returns the source port of the connection.

features/routing/dns/context.go

@@ -23,7 +23,7 @@ func (ctx *ResolvableContext) GetTargetIPs() []net.IP {
 	}
 
 	if domain := ctx.GetTargetDomain(); len(domain) != 0 {
-		ips, _, err := ctx.dnsClient.LookupIP(domain, dns.IPOption{
+		ips, err := ctx.dnsClient.LookupIP(domain, dns.IPOption{
 			IPv4Enable: true,
 			IPv6Enable: true,
 			FakeEnable: false,

features/stats/stats.go

@@ -2,7 +2,6 @@ package stats
 
 import (
 	"context"
-	"time"
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/errors"
@@ -31,8 +30,6 @@ type OnlineMap interface {
 	AddIP(string)
 	// List is the current OnlineMap ip list.
 	List() []string
-	// IpTimeMap return client ips and their last access time.
-	IpTimeMap() map[string]time.Time
 }
 
 // Channel is the interface for stats channel.

go.mod

@@ -1,37 +1,37 @@
 module github.com/xtls/xray-core
 
-go 1.24
+go 1.21.4
 
 require (
 	github.com/OmarTariq612/goech v0.0.0-20240405204721-8e2e1dafd3a0
-	github.com/cloudflare/circl v1.6.1
+	github.com/cloudflare/circl v1.4.0
 	github.com/ghodss/yaml v1.0.1-0.20220118164431-d8423dcdf344
 	github.com/golang/mock v1.7.0-rc.1
-	github.com/google/go-cmp v0.7.0
+	github.com/google/go-cmp v0.6.0
 	github.com/gorilla/websocket v1.5.3
-	github.com/miekg/dns v1.1.65
+	github.com/miekg/dns v1.1.62
 	github.com/pelletier/go-toml v1.9.5
 	github.com/pires/go-proxyproto v0.8.0
-	github.com/quic-go/quic-go v0.51.0
+	github.com/quic-go/quic-go v0.46.0
-	github.com/refraction-networking/utls v1.7.1
+	github.com/refraction-networking/utls v1.6.7
 	github.com/sagernet/sing v0.5.1
 	github.com/sagernet/sing-shadowsocks v0.2.7
 	github.com/seiflotfy/cuckoofilter v0.0.0-20240715131351-a2f2c23f1771
-	github.com/stretchr/testify v1.10.0
+	github.com/stretchr/testify v1.9.0
 	github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e
 	github.com/vishvananda/netlink v1.3.0
 	github.com/xtls/reality v0.0.0-20240712055506-48f0b2d5ed6d
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba
-	golang.org/x/crypto v0.37.0
+	golang.org/x/crypto v0.29.0
-	golang.org/x/net v0.39.0
+	golang.org/x/net v0.31.0
-	golang.org/x/sync v0.13.0
+	golang.org/x/sync v0.9.0
-	golang.org/x/sys v0.32.0
+	golang.org/x/sys v0.27.0
 	golang.zx2c4.com/wireguard v0.0.0-20231211153847-12269c276173
-	google.golang.org/grpc v1.72.0
+	google.golang.org/grpc v1.67.1
-	google.golang.org/protobuf v1.36.6
+	google.golang.org/protobuf v1.35.2
-	gvisor.dev/gvisor v0.0.0-20250428193742-2d800c3129d5
+	gvisor.dev/gvisor v0.0.0-20231202080848-1f7806d17489
 	h12.io/socks v1.0.3
-	lukechampine.com/blake3 v1.4.0
+	lukechampine.com/blake3 v1.3.0
 )
 
 require (
@@ -45,16 +45,17 @@ require (
 	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
 	github.com/onsi/ginkgo/v2 v2.19.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/quic-go/qpack v0.5.1 // indirect
+	github.com/quic-go/qpack v0.4.0 // indirect
 	github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3 // indirect
 	github.com/vishvananda/netns v0.0.4 // indirect
-	go.uber.org/mock v0.5.0 // indirect
+	go.uber.org/mock v0.4.0 // indirect
-	golang.org/x/mod v0.23.0 // indirect
+	golang.org/x/exp v0.0.0-20240531132922-fd00a4e0eefc // indirect
-	golang.org/x/text v0.24.0 // indirect
+	golang.org/x/mod v0.18.0 // indirect
-	golang.org/x/time v0.7.0 // indirect
+	golang.org/x/text v0.20.0 // indirect
-	golang.org/x/tools v0.30.0 // indirect
+	golang.org/x/time v0.5.0 // indirect
+	golang.org/x/tools v0.22.0 // indirect
 	golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20250218202821-56aae31c358a // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240814211410-ddb44dafa142 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -2,8 +2,8 @@ github.com/OmarTariq612/goech v0.0.0-20240405204721-8e2e1dafd3a0 h1:Wo41lDOevRJS
 github.com/OmarTariq612/goech v0.0.0-20240405204721-8e2e1dafd3a0/go.mod h1:FVGavL/QEBQDcBpr3fAojoK17xX5k9bicBphrOpP7uM=
 github.com/andybalholm/brotli v1.1.0 h1:eLKJA0d02Lf0mVpIDgYnqXcUn0GqVmEFny3VuID1U3M=
 github.com/andybalholm/brotli v1.1.0/go.mod h1:sms7XGricyQI9K10gOSf56VKKWS4oLer58Q+mhRPtnY=
-github.com/cloudflare/circl v1.6.1 h1:zqIqSPIndyBh1bjLVVDHMPpVKqp8Su/V+6MeDzzQBQ0=
+github.com/cloudflare/circl v1.4.0 h1:BV7h5MgrktNzytKmWjpOtdYrf0lkkbF8YMlBGPhJQrY=
-github.com/cloudflare/circl v1.6.1/go.mod h1:uddAzsPgqdMAYatqJ0lsjX1oECcQLIlRpzZh3pJrofs=
+github.com/cloudflare/circl v1.4.0/go.mod h1:PDRU+oXvdD7KCtgKxW95M5Z8BpSCJXQORiZFnBQS5QU=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -12,24 +12,18 @@ github.com/dgryski/go-metro v0.0.0-20211217172704-adc40b04c140 h1:y7y0Oa6UawqTFP
 github.com/dgryski/go-metro v0.0.0-20211217172704-adc40b04c140/go.mod h1:c9O8+fpSOX1DM8cPNSkX/qsBWdkD4yd2dpciOWQjpBw=
 github.com/ghodss/yaml v1.0.1-0.20220118164431-d8423dcdf344 h1:Arcl6UOIS/kgO2nW3A65HN+7CMjSDP/gofXL4CZt1V4=
 github.com/ghodss/yaml v1.0.1-0.20220118164431-d8423dcdf344/go.mod h1:GIjDIg/heH5DOkXY3YJ/wNhfHsQHoXGjl8G8amsYQ1I=
-github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
+github.com/go-logr/logr v1.4.1 h1:pKouT5E8xu9zeFC39JXRDukb6JFQPXM5p5I91188VAQ=
-github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/logr v1.4.1/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
-github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
-github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/go-task/slim-sprig/v3 v3.0.0 h1:sUs3vkvUymDpBKi3qH1YSqBQk9+9D/8M2mN1vB6EwHI=
 github.com/go-task/slim-sprig/v3 v3.0.0/go.mod h1:W848ghGpv3Qj3dhTPRyJypKRiqCdHZiAzKg9hl15HA8=
 github.com/golang/mock v1.7.0-rc.1 h1:YojYx61/OLFsiv6Rw1Z96LpldJIy31o+UHmwAUMJ6/U=
 github.com/golang/mock v1.7.0-rc.1/go.mod h1:s42URUywIqd+OcERslBJvOjepvNymP31m3q8d/GkuRs=
-github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
-github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
 github.com/google/btree v1.1.2 h1:xf4v41cLI2Z6FxbKm+8Bu+m8ifhj15JuZ9sa0jZCMUU=
 github.com/google/btree v1.1.2/go.mod h1:qOPhT0dTNdNzV6Z/lhRX0YXUafgPLFUh+gZMl761Gm4=
-github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
-github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/pprof v0.0.0-20240528025155-186aa0362fba h1:ql1qNgCyOB7iAEk8JTNM+zJrgIbnyCKX/wdlyPufP5g=
 github.com/google/pprof v0.0.0-20240528025155-186aa0362fba/go.mod h1:K1liHPHnj73Fdn/EKuT8nrFqBihUSKXoLYU0BuatOYo=
-github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
-github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
 github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/h12w/go-socks5 v0.0.0-20200522160539-76189e178364 h1:5XxdakFhqd9dnXoAZy1Mb2R/DZ6D1e+0bGC/JhucGYI=
@@ -38,8 +32,8 @@ github.com/klauspost/compress v1.17.8 h1:YcnTYrq7MikUT7k0Yb5eceMmALQPYBW/Xltxn0N
 github.com/klauspost/compress v1.17.8/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
 github.com/klauspost/cpuid/v2 v2.2.7 h1:ZWSB3igEs+d0qvnxR/ZBzXVmxkgt8DdzP6m9pfuVLDM=
 github.com/klauspost/cpuid/v2 v2.2.7/go.mod h1:Lcz8mBdAVJIBVzewtcLocK12l3Y+JytZYpaMropDUws=
-github.com/miekg/dns v1.1.65 h1:0+tIPHzUW0GCge7IiK3guGP57VAw7hoPDfApjkMD1Fc=
+github.com/miekg/dns v1.1.62 h1:cN8OuEF1/x5Rq6Np+h1epln8OiyPWV+lROx9LxcGgIQ=
-github.com/miekg/dns v1.1.65/go.mod h1:Dzw9769uoKVaLuODMDZz9M6ynFU6Em65csPuoi8G0ck=
+github.com/miekg/dns v1.1.62/go.mod h1:mvDlcItzm+br7MToIKqkglaGhlFMHJ9DTNNWONWXbNQ=
 github.com/onsi/ginkgo/v2 v2.19.0 h1:9Cnnf7UHo57Hy3k6/m5k3dRfGTMXGvxhHFvkDTCTpvA=
 github.com/onsi/ginkgo/v2 v2.19.0/go.mod h1:rlwLi9PilAFJ8jCg9UE1QP6VBpd6/xj3SRC0d6TU0To=
 github.com/onsi/gomega v1.33.1 h1:dsYjIxxSR755MDmKVsaFQTE22ChNBcuuTWgkUDSubOk=
@@ -52,12 +46,12 @@ github.com/pires/go-proxyproto v0.8.0 h1:5unRmEAPbHXHuLjDg01CxJWf91cw3lKHc/0xzKp
 github.com/pires/go-proxyproto v0.8.0/go.mod h1:iknsfgnH8EkjrMeMyvfKByp9TiBZCKZM0jx2xmKqnVY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/quic-go/qpack v0.5.1 h1:giqksBPnT/HDtZ6VhtFKgoLOWmlyo9Ei6u9PqzIMbhI=
+github.com/quic-go/qpack v0.4.0 h1:Cr9BXA1sQS2SmDUWjSofMPNKmvF6IiIfDRmgU0w1ZCo=
-github.com/quic-go/qpack v0.5.1/go.mod h1:+PC4XFrEskIVkcLzpEkbLqq1uCoxPhQuvK5rH1ZgaEg=
+github.com/quic-go/qpack v0.4.0/go.mod h1:UZVnYIfi5GRk+zI9UMaCPsmZ2xKJP7XBUvVyT1Knj9A=
-github.com/quic-go/quic-go v0.51.0 h1:K8exxe9zXxeRKxaXxi/GpUqYiTrtdiWP8bo1KFya6Wc=
+github.com/quic-go/quic-go v0.46.0 h1:uuwLClEEyk1DNvchH8uCByQVjo3yKL9opKulExNDs7Y=
-github.com/quic-go/quic-go v0.51.0/go.mod h1:MFlGGpcpJqRAfmYi6NC2cptDPSxRWTOGNuP4wqrWmzQ=
+github.com/quic-go/quic-go v0.46.0/go.mod h1:1dLehS7TIR64+vxGR70GDcatWTOtMX2PUtnKsjbTurI=
-github.com/refraction-networking/utls v1.7.1 h1:dxg+jla3uocgN8HtX+ccwDr68uCBBO3qLrkZUbqkcw0=
+github.com/refraction-networking/utls v1.6.7 h1:zVJ7sP1dJx/WtVuITug3qYUq034cDq9B2MR1K67ULZM=
-github.com/refraction-networking/utls v1.7.1/go.mod h1:TUhh27RHMGtQvjQq+RyO11P6ZNQNBb3N0v7wsEjKAIQ=
+github.com/refraction-networking/utls v1.6.7/go.mod h1:BC3O4vQzye5hqpmDTWUqi4P5DDhzJfkV1tdqtawQIH0=
 github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3 h1:f/FNXud6gA3MNr8meMVVGxhp+QBTqY91tM8HjEuMjGg=
 github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3/go.mod h1:HgjTstvQsPGkxUsCd2KWxErBblirPizecHcpD3ffK+s=
 github.com/sagernet/sing v0.5.1 h1:mhL/MZVq0TjuvHcpYcFtmSD1BFOxZ/+8ofbNZcg1k1Y=
@@ -68,8 +62,8 @@ github.com/seiflotfy/cuckoofilter v0.0.0-20240715131351-a2f2c23f1771 h1:emzAzMZ1
 github.com/seiflotfy/cuckoofilter v0.0.0-20240715131351-a2f2c23f1771/go.mod h1:bR6DqgcAl1zTcOX8/pE2Qkj9XO00eCNqmKb7lXP8EAg=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
-github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e h1:5QefA066A1tF8gHIiADmOVOV5LS43gt3ONnlEl3xkwI=
 github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e/go.mod h1:5t19P9LBIrNamL6AcMQOncg/r10y3Pc01AbHeMhwlpU=
 github.com/vishvananda/netlink v1.3.0 h1:X7l42GfcV4S6E4vHTsw48qbrV+9PVojNfIhZcwQdrZk=
@@ -79,38 +73,28 @@ github.com/vishvananda/netns v0.0.4/go.mod h1:SpkAiCQRtJ6TvvxPnOSyH3BMl6unz3xZla
 github.com/xtls/reality v0.0.0-20240712055506-48f0b2d5ed6d h1:+B97uD9uHLgAAulhigmys4BVwZZypzK7gPN3WtpgRJg=
 github.com/xtls/reality v0.0.0-20240712055506-48f0b2d5ed6d/go.mod h1:dm4y/1QwzjGaK17ofi0Vs6NpKAHegZky8qk6J2JJZAE=
 github.com/yuin/goldmark v1.4.1/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
-go.opentelemetry.io/auto/sdk v1.1.0 h1:cH53jehLUN6UFLY71z+NDOiNJqDdPRaXzTel0sJySYA=
+go.uber.org/mock v0.4.0 h1:VcM4ZOtdbR4f6VXfiOpwpVJDL6lCReaZ6mw31wqh7KU=
-go.opentelemetry.io/auto/sdk v1.1.0/go.mod h1:3wSPjt5PWp2RhlCcmmOial7AvC4DQqZb7a7wCow3W8A=
+go.uber.org/mock v0.4.0/go.mod h1:a6FSlNadKUHUa9IP5Vyt1zh4fC7uAwxMutEAscFbkZc=
-go.opentelemetry.io/otel v1.34.0 h1:zRLXxLCgL1WyKsPVrgbSdMN4c0FMkDAskSTQP+0hdUY=
-go.opentelemetry.io/otel v1.34.0/go.mod h1:OWFPOQ+h4G8xpyjgqo4SxJYdDQ/qmRH+wivy7zzx9oI=
-go.opentelemetry.io/otel/metric v1.34.0 h1:+eTR3U0MyfWjRDhmFMxe2SsW64QrZ84AOhvqS7Y+PoQ=
-go.opentelemetry.io/otel/metric v1.34.0/go.mod h1:CEDrp0fy2D0MvkXE+dPV7cMi8tWZwX3dmaIhwPOaqHE=
-go.opentelemetry.io/otel/sdk v1.34.0 h1:95zS4k/2GOy069d321O8jWgYsW3MzVV+KuSPKp7Wr1A=
-go.opentelemetry.io/otel/sdk v1.34.0/go.mod h1:0e/pNiaMAqaykJGKbi+tSjWfNNHMTxoC9qANsCzbyxU=
-go.opentelemetry.io/otel/sdk/metric v1.34.0 h1:5CeK9ujjbFVL5c1PhLuStg1wxA7vQv7ce1EK0Gyvahk=
-go.opentelemetry.io/otel/sdk/metric v1.34.0/go.mod h1:jQ/r8Ze28zRKoNRdkjCZxfs6YvBTG1+YIqyFVFYec5w=
-go.opentelemetry.io/otel/trace v1.34.0 h1:+ouXS2V8Rd4hp4580a8q23bg0azF2nI8cqLYnC8mh/k=
-go.opentelemetry.io/otel/trace v1.34.0/go.mod h1:Svm7lSjQD7kG7KJ/MUHPVXSDGz2OX4h0M2jHBhmSfRE=
-go.uber.org/mock v0.5.0 h1:KAMbZvZPyBPWgD14IrIQ38QCyjwpvVVV6K/bHl1IwQU=
-go.uber.org/mock v0.5.0/go.mod h1:ge71pBPLYDk7QIi1LupWxdAykm7KIEFchiOqd6z7qMM=
 go4.org/netipx v0.0.0-20231129151722-fdeea329fbba h1:0b9z3AuHCjxk0x/opv64kcgZLBseWJUpBw5I82+2U4M=
 go4.org/netipx v0.0.0-20231129151722-fdeea329fbba/go.mod h1:PLyyIXexvUFg3Owu6p/WfdlivPbZJsZdgWZlrGope/Y=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.37.0 h1:kJNSjF/Xp7kU0iB2Z+9viTPMW4EqqsrywMXLJOOsXSE=
+golang.org/x/crypto v0.29.0 h1:L5SG1JTTXupVV3n6sUqMTeWbjAyfPwoda2DLX8J8FrQ=
-golang.org/x/crypto v0.37.0/go.mod h1:vg+k43peMZ0pUMhYmVAWysMK35e6ioLh3wB8ZCAfbVc=
+golang.org/x/crypto v0.29.0/go.mod h1:+F4F4N5hv6v38hfeYwTdx20oUvLLc+QfrE9Ax9HtgRg=
+golang.org/x/exp v0.0.0-20240531132922-fd00a4e0eefc h1:O9NuF4s+E/PvMIy+9IUZB9znFwUIXEWSstNjek6VpVg=
+golang.org/x/exp v0.0.0-20240531132922-fd00a4e0eefc/go.mod h1:XtvwrStGgqGPLc4cjQfWqZHG1YFdYs6swckp8vpsjnc=
 golang.org/x/mod v0.5.1/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro=
-golang.org/x/mod v0.23.0 h1:Zb7khfcRGKk+kqfxFaP5tZqCnDZMjC5VtUBs87Hr6QM=
+golang.org/x/mod v0.18.0 h1:5+9lSbEzPSdWkH32vYPBwEpX8KwDbM52Ud9xBUvNlb0=
-golang.org/x/mod v0.23.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY=
+golang.org/x/mod v0.18.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20211015210444-4f30a5c0130f/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.39.0 h1:ZCu7HMWDxpXpaiKdhzIfaltL9Lp31x/3fCP11bc6/fY=
+golang.org/x/net v0.31.0 h1:68CPQngjLL0r2AlUKiSxtQFKvzRVbnzLwMUn5SzcLHo=
-golang.org/x/net v0.39.0/go.mod h1:X7NRbYVEA+ewNkCNyJ513WmMdQ3BineSwVtN2zD/d+E=
+golang.org/x/net v0.31.0/go.mod h1:P4fl1q7dY2hnZFxEk4pPSkDHF+QqjitcnDjUQyMM+pM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.13.0 h1:AauUjRAJ9OSnvULf/ARrrVywoJDy0YS2AwQ98I37610=
+golang.org/x/sync v0.9.0 h1:fEo0HyrW1GIgZdpbhCRO0PkJajUS5H9IFUztCgEo2jQ=
-golang.org/x/sync v0.13.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
+golang.org/x/sync v0.9.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -119,21 +103,21 @@ golang.org/x/sys v0.0.0-20211019181941-9d821ace8654/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.32.0 h1:s77OFDvIQeibCmezSnk/q6iAfkdiQaJi4VzroCFrN20=
+golang.org/x/sys v0.27.0 h1:wBqf8DvsY9Y/2P8gAfPDEYNuS30J4lPHJxXSb/nJZ+s=
-golang.org/x/sys v0.32.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
+golang.org/x/sys v0.27.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.24.0 h1:dd5Bzh4yt5KYA8f9CJHCP4FB4D51c2c6JvN37xJJkJ0=
+golang.org/x/text v0.20.0 h1:gK/Kv2otX8gz+wn7Rmb3vT96ZwuoxnQlY+HlJVj7Qug=
-golang.org/x/text v0.24.0/go.mod h1:L8rBsPeo2pSS+xqN0d5u2ikmjtmoJbDBT1b7nHvFCdU=
+golang.org/x/text v0.20.0/go.mod h1:D4IsuqiFMhST5bX19pQ9ikHC2GsaKyk/oF+pn3ducp4=
-golang.org/x/time v0.7.0 h1:ntUhktv3OPE6TgYxXWv9vKvUSJyIFJlyohwbkEwPrKQ=
+golang.org/x/time v0.5.0 h1:o7cqy6amK/52YcAKIPlM3a+Fpj35zvRj2TP+e1xFSfk=
-golang.org/x/time v0.7.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
+golang.org/x/time v0.5.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.8/go.mod h1:nABZi5QlRsZVlzPpHl034qft6wpY4eDcsTt5AaioBiU=
-golang.org/x/tools v0.30.0 h1:BgcpHewrV5AUp2G9MebG4XPFI1E2W41zU1SaqVA9vJY=
+golang.org/x/tools v0.22.0 h1:gqSGLZqv+AI9lIQzniJ0nZDRG5GBPsSi+DRNHWNz6yA=
-golang.org/x/tools v0.30.0/go.mod h1:c347cR/OJfw5TI+GfX7RUPNMdDRRbjvYTS0jPyvsVtY=
+golang.org/x/tools v0.22.0/go.mod h1:aCwcsjqvq7Yqt6TNyX7QMU2enbQ/Gt0bo6krSeEri+c=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -141,12 +125,12 @@ golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 h1:B82qJJgjvYKsXS9jeu
 golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2/go.mod h1:deeaetjYA+DHMHg+sMSMI58GrEteJUUzzw7en6TJQcI=
 golang.zx2c4.com/wireguard v0.0.0-20231211153847-12269c276173 h1:/jFs0duh4rdb8uIfPMv78iAJGcPKDeqAFnaLBropIC4=
 golang.zx2c4.com/wireguard v0.0.0-20231211153847-12269c276173/go.mod h1:tkCQ4FQXmpAgYVh++1cq16/dH4QJtmvpRv19DWGAHSA=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20250218202821-56aae31c358a h1:51aaUVRocpvUOSQKM6Q7VuoaktNIaMCLuhZB6DKksq4=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240814211410-ddb44dafa142 h1:e7S5W7MGGLaSu8j3YjdezkZ+m1/Nm0uRVRMEMGk26Xs=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20250218202821-56aae31c358a/go.mod h1:uRxBH1mhmO8PGhU89cMcHaXKZqO+OfakD8QQO0oYwlQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240814211410-ddb44dafa142/go.mod h1:UqMtugtsSgubUsoxbuAoiCXvqvErP7Gf0so0mK9tHxU=
-google.golang.org/grpc v1.72.0 h1:S7UkcVa60b5AAQTaO6ZKamFp1zMZSU0fGDK2WZLbBnM=
+google.golang.org/grpc v1.67.1 h1:zWnc1Vrcno+lHZCOofnIMvycFcc0QRGIzm9dhnDX68E=
-google.golang.org/grpc v1.72.0/go.mod h1:wH5Aktxcg25y1I3w7H69nHfXdOG3UiadoBtjh3izSDM=
+google.golang.org/grpc v1.67.1/go.mod h1:1gLDyUQU7CTLJI90u3nXZ9ekeghjeM7pTDZlqFNg2AA=
-google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
+google.golang.org/protobuf v1.35.2 h1:8Ar7bF+apOIoThw1EdZl0p1oWvMqTHmpA2fRTyZO8io=
-google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
+google.golang.org/protobuf v1.35.2/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
@@ -156,9 +140,9 @@ gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C
 gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gvisor.dev/gvisor v0.0.0-20250428193742-2d800c3129d5 h1:sfK5nHuG7lRFZ2FdTT3RimOqWBg8IrVm+/Vko1FVOsk=
+gvisor.dev/gvisor v0.0.0-20231202080848-1f7806d17489 h1:ze1vwAdliUAr68RQ5NtufWaXaOg8WUO2OACzEV+TNdE=
-gvisor.dev/gvisor v0.0.0-20250428193742-2d800c3129d5/go.mod h1:3r5CMtNQMKIvBlrmM9xWUNamjKBYPOWyXOjmg5Kts3g=
+gvisor.dev/gvisor v0.0.0-20231202080848-1f7806d17489/go.mod h1:10sU+Uh5KKNv1+2x2A0Gvzt8FjD3ASIhorV3YsauXhk=
 h12.io/socks v1.0.3 h1:Ka3qaQewws4j4/eDQnOdpr4wXsC//dXtWvftlIcCQUo=
 h12.io/socks v1.0.3/go.mod h1:AIhxy1jOId/XCz9BO+EIgNL2rQiPTBNnOfnVnQ+3Eck=
-lukechampine.com/blake3 v1.4.0 h1:xDbKOZCVbnZsfzM6mHSYcGRHZ3YrLDzqz8XnV4uaD5w=
+lukechampine.com/blake3 v1.3.0 h1:sJ3XhFINmHSrYCgl958hscfIa3bw8x4DqMP3u1YvoYE=
-lukechampine.com/blake3 v1.4.0/go.mod h1:MQJNQCTnR+kwOP/JEZSxj3MaQjp80FOFSNMMHXcSeX0=
+lukechampine.com/blake3 v1.3.0/go.mod h1:0OFRp7fBtAylGVCO40o87sbupkyIGgbpv1+M1k1LM6k=

infra/conf/cfgcommon/duration/duration.go

@@ -8,13 +8,11 @@ import (
 
 type Duration int64
 
-// MarshalJSON implements encoding/json.Marshaler.MarshalJSON
 func (d *Duration) MarshalJSON() ([]byte, error) {
 	dr := time.Duration(*d)
 	return json.Marshal(dr.String())
 }
 
-// UnmarshalJSON implements encoding/json.Unmarshaler.UnmarshalJSON
 func (d *Duration) UnmarshalJSON(b []byte) error {
 	var v interface{}
 	if err := json.Unmarshal(b, &v); err != nil {

infra/conf/common.go

@@ -2,7 +2,6 @@ package conf
 
 import (
 	"encoding/json"
-	"fmt"
 	"strconv"
 	"strings"
 
@@ -23,7 +22,6 @@ func (v StringList) Len() int {
 	return len(v)
 }
 
-// UnmarshalJSON implements encoding/json.Unmarshaler.UnmarshalJSON
 func (v *StringList) UnmarshalJSON(data []byte) error {
 	var strarray []string
 	if err := json.Unmarshal(data, &strarray); err == nil {
@@ -44,12 +42,10 @@ type Address struct {
 	net.Address
 }
 
-// MarshalJSON implements encoding/json.Marshaler.MarshalJSON
+func (v Address) MarshalJSON() ([]byte, error) {
-func (v *Address) MarshalJSON() ([]byte, error) {
 	return json.Marshal(v.Address.String())
 }
 
-// UnmarshalJSON implements encoding/json.Unmarshaler.UnmarshalJSON
 func (v *Address) UnmarshalJSON(data []byte) error {
 	var rawStr string
 	if err := json.Unmarshal(data, &rawStr); err != nil {
@@ -84,7 +80,6 @@ func (v Network) Build() net.Network {
 
 type NetworkList []Network
 
-// UnmarshalJSON implements encoding/json.Unmarshaler.UnmarshalJSON
 func (v *NetworkList) UnmarshalJSON(data []byte) error {
 	var strarray []Network
 	if err := json.Unmarshal(data, &strarray); err == nil {
@@ -173,19 +168,6 @@ func (v *PortRange) Build() *net.PortRange {
 	}
 }
 
-// MarshalJSON implements encoding/json.Marshaler.MarshalJSON
-func (v *PortRange) MarshalJSON() ([]byte, error) {
-	return json.Marshal(v.String())
-}
-
-func (port *PortRange) String() string {
-	if port.From == port.To {
-		return strconv.Itoa(int(port.From))
-	} else {
-		return fmt.Sprintf("%d-%d", port.From, port.To)
-	}
-}
-
 // UnmarshalJSON implements encoding/json.Unmarshaler.UnmarshalJSON
 func (v *PortRange) UnmarshalJSON(data []byte) error {
 	port, err := parseIntPort(data)
@@ -220,25 +202,6 @@ func (list *PortList) Build() *net.PortList {
 	return portList
 }
 
-// MarshalJSON implements encoding/json.Marshaler.MarshalJSON
-func (v *PortList) MarshalJSON() ([]byte, error) {
-	portStr := v.String()
-	port, err := strconv.Atoi(portStr)
-	if err == nil {
-		return json.Marshal(port)
-	} else {
-		return json.Marshal(portStr)
-	}
-}
-
-func (v PortList) String() string {
-	ports := []string{}
-	for _, port := range v.Range {
-		ports = append(ports, port.String())
-	}
-	return strings.Join(ports, ",")
-}
-
 // UnmarshalJSON implements encoding/json.Unmarshaler.UnmarshalJSON
 func (list *PortList) UnmarshalJSON(data []byte) error {
 	var listStr string
@@ -295,20 +258,6 @@ type Int32Range struct {
 	To    int32
 }
 
-// MarshalJSON implements encoding/json.Marshaler.MarshalJSON
-func (v *Int32Range) MarshalJSON() ([]byte, error) {
-	return json.Marshal(v.String())
-}
-
-func (v Int32Range) String() string {
-	if v.Left == v.Right {
-		return strconv.Itoa(int(v.Left))
-	} else {
-		return fmt.Sprintf("%d-%d", v.Left, v.Right)
-	}
-}
-
-// UnmarshalJSON implements encoding/json.Unmarshaler.UnmarshalJSON
 func (v *Int32Range) UnmarshalJSON(data []byte) error {
 	defer v.ensureOrder()
 	var str string

infra/conf/dns.go

@@ -12,20 +12,15 @@ import (
 )
 
 type NameServerConfig struct {
-	Address            *Address   `json:"address"`
+	Address       *Address
-	ClientIP           *Address   `json:"clientIp"`
+	ClientIP      *Address
-	Port               uint16     `json:"port"`
+	Port          uint16
-	SkipFallback       bool       `json:"skipFallback"`
+	SkipFallback  bool
-	Domains            []string   `json:"domains"`
+	Domains       []string
-	ExpectedIPs        StringList `json:"expectedIPs"`
+	ExpectIPs     StringList
-	ExpectIPs          StringList `json:"expectIPs"`
+	QueryStrategy string
-	QueryStrategy      string     `json:"queryStrategy"`
-	AllowUnexpectedIPs bool       `json:"allowUnexpectedIps"`
-	Tag                string     `json:"tag"`
-	TimeoutMs          uint64     `json:"timeoutMs"`
 }
 
-// UnmarshalJSON implements encoding/json.Unmarshaler.UnmarshalJSON
 func (c *NameServerConfig) UnmarshalJSON(data []byte) error {
 	var address Address
 	if err := json.Unmarshal(data, &address); err == nil {
@@ -34,17 +29,13 @@ func (c *NameServerConfig) UnmarshalJSON(data []byte) error {
 	}
 
 	var advanced struct {
-		Address            *Address   `json:"address"`
+		Address       *Address   `json:"address"`
-		ClientIP           *Address   `json:"clientIp"`
+		ClientIP      *Address   `json:"clientIp"`
-		Port               uint16     `json:"port"`
+		Port          uint16     `json:"port"`
-		SkipFallback       bool       `json:"skipFallback"`
+		SkipFallback  bool       `json:"skipFallback"`
-		Domains            []string   `json:"domains"`
+		Domains       []string   `json:"domains"`
-		ExpectedIPs        StringList `json:"expectedIPs"`
+		ExpectIPs     StringList `json:"expectIps"`
-		ExpectIPs          StringList `json:"expectIPs"`
+		QueryStrategy string     `json:"queryStrategy"`
-		QueryStrategy      string     `json:"queryStrategy"`
-		AllowUnexpectedIPs bool       `json:"allowUnexpectedIps"`
-		Tag                string     `json:"tag"`
-		TimeoutMs          uint64     `json:"timeoutMs"`
 	}
 	if err := json.Unmarshal(data, &advanced); err == nil {
 		c.Address = advanced.Address
@@ -52,12 +43,8 @@ func (c *NameServerConfig) UnmarshalJSON(data []byte) error {
 		c.Port = advanced.Port
 		c.SkipFallback = advanced.SkipFallback
 		c.Domains = advanced.Domains
-		c.ExpectedIPs = advanced.ExpectedIPs
 		c.ExpectIPs = advanced.ExpectIPs
 		c.QueryStrategy = advanced.QueryStrategy
-		c.AllowUnexpectedIPs = advanced.AllowUnexpectedIPs
-		c.Tag = advanced.Tag
-		c.TimeoutMs = advanced.TimeoutMs
 		return nil
 	}
 
@@ -105,13 +92,9 @@ func (c *NameServerConfig) Build() (*dns.NameServer, error) {
 		})
 	}
 
-	var expectedIPs = c.ExpectedIPs
+	geoipList, err := ToCidrList(c.ExpectIPs)
-	if len(expectedIPs) == 0 {
-		expectedIPs = c.ExpectIPs
-	}
-	geoipList, err := ToCidrList(expectedIPs)
 	if err != nil {
-		return nil, errors.New("invalid IP rule: ", expectedIPs).Base(err)
+		return nil, errors.New("invalid IP rule: ", c.ExpectIPs).Base(err)
 	}
 
 	var myClientIP []byte
@@ -128,15 +111,12 @@ func (c *NameServerConfig) Build() (*dns.NameServer, error) {
 			Address: c.Address.Build(),
 			Port:    uint32(c.Port),
 		},
-		ClientIp:           myClientIP,
+		ClientIp:          myClientIP,
-		SkipFallback:       c.SkipFallback,
+		SkipFallback:      c.SkipFallback,
-		PrioritizedDomain:  domains,
+		PrioritizedDomain: domains,
-		Geoip:              geoipList,
+		Geoip:             geoipList,
-		OriginalRules:      originalRules,
+		OriginalRules:     originalRules,
-		QueryStrategy:      resolveQueryStrategy(c.QueryStrategy),
+		QueryStrategy:     resolveQueryStrategy(c.QueryStrategy),
-		AllowUnexpectedIPs: c.AllowUnexpectedIPs,
-		Tag:                c.Tag,
-		TimeoutMs:          c.TimeoutMs,
 	}, nil
 }
 
@@ -164,18 +144,6 @@ type HostAddress struct {
 	addrs []*Address
 }
 
-// MarshalJSON implements encoding/json.Marshaler.MarshalJSON
-func (h *HostAddress) MarshalJSON() ([]byte, error) {
-	if (h.addr != nil) != (h.addrs != nil) {
-		if h.addr != nil {
-			return json.Marshal(h.addr)
-		} else if h.addrs != nil {
-			return json.Marshal(h.addrs)
-		}
-	}
-	return nil, errors.New("unexpected config state")
-}
-
 // UnmarshalJSON implements encoding/json.Unmarshaler.UnmarshalJSON
 func (h *HostAddress) UnmarshalJSON(data []byte) error {
 	addr := new(Address)
@@ -221,11 +189,6 @@ func getHostMapping(ha *HostAddress) *dns.Config_HostMapping {
 	}
 }
 
-// MarshalJSON implements encoding/json.Marshaler.MarshalJSON
-func (m *HostsWrapper) MarshalJSON() ([]byte, error) {
-	return json.Marshal(m.Hosts)
-}
-
 // UnmarshalJSON implements encoding/json.Unmarshaler.UnmarshalJSON
 func (m *HostsWrapper) UnmarshalJSON(data []byte) error {
 	hosts := make(map[string]*HostAddress)

infra/conf/fakedns.go

@@ -20,18 +20,6 @@ type FakeDNSConfig struct {
 	pools []*FakeDNSPoolElementConfig
 }
 
-// MarshalJSON implements encoding/json.Marshaler.MarshalJSON
-func (f *FakeDNSConfig) MarshalJSON() ([]byte, error) {
-	if (f.pool != nil) != (f.pools != nil) {
-		if f.pool != nil {
-			return json.Marshal(f.pool)
-		} else if f.pools != nil {
-			return json.Marshal(f.pools)
-		}
-	}
-	return nil, errors.New("unexpected config state")
-}
-
 // UnmarshalJSON implements encoding/json.Unmarshaler.UnmarshalJSON
 func (f *FakeDNSConfig) UnmarshalJSON(data []byte) error {
 	var pool FakeDNSPoolElementConfig

infra/conf/freedom.go

@@ -2,7 +2,6 @@ package conf
 
 import (
 	"encoding/base64"
-	"encoding/hex"
 	"net"
 	"strings"
 
@@ -153,9 +152,8 @@ func (c *FreedomConfig) Build() (proto.Message, error) {
 func ParseNoise(noise *Noise) (*freedom.Noise, error) {
 	var err error
 	NConfig := new(freedom.Noise)
-	noise.Packet = strings.TrimSpace(noise.Packet)
 
-	switch noise.Type {
+	switch strings.ToLower(noise.Type) {
 	case "rand":
 		min, max, err := ParseRangeString(noise.Packet)
 		if err != nil {
@@ -163,35 +161,42 @@ func ParseNoise(noise *Noise) (*freedom.Noise, error) {
 		}
 		NConfig.LengthMin = uint64(min)
 		NConfig.LengthMax = uint64(max)
+		if NConfig.LengthMin > NConfig.LengthMax {
+			NConfig.LengthMin, NConfig.LengthMax = NConfig.LengthMax, NConfig.LengthMin
+		}
 		if NConfig.LengthMin == 0 {
 			return nil, errors.New("rand lengthMin or lengthMax cannot be 0")
 		}
 
 	case "str":
-		// user input string
+		//user input string
-		NConfig.Packet = []byte(noise.Packet)
+		NConfig.StrNoise = []byte(strings.TrimSpace(noise.Packet))
-
-	case "hex":
-		// user input hex
-		NConfig.Packet, err = hex.DecodeString(noise.Packet)
-		if err != nil {
-			return nil, errors.New("Invalid hex string").Base(err)
-		}
 
 	case "base64":
-		// user input base64
+		//user input base64
-		NConfig.Packet, err = base64.RawURLEncoding.DecodeString(strings.NewReplacer("+", "-", "/", "_", "=", "").Replace(noise.Packet))
+		NConfig.StrNoise, err = base64.StdEncoding.DecodeString(strings.TrimSpace(noise.Packet))
 		if err != nil {
-			return nil, errors.New("Invalid base64 string").Base(err)
+			return nil, errors.New("Invalid base64 string")
 		}
 
 	default:
-		return nil, errors.New("Invalid packet, only rand/str/hex/base64 are supported")
+		return nil, errors.New("Invalid packet,only rand,str,base64 are supported")
 	}
 
 	if noise.Delay != nil {
-		NConfig.DelayMin = uint64(noise.Delay.From)
+		if noise.Delay.From != 0 && noise.Delay.To != 0 {
-		NConfig.DelayMax = uint64(noise.Delay.To)
+			NConfig.DelayMin = uint64(noise.Delay.From)
+			NConfig.DelayMax = uint64(noise.Delay.To)
+			if NConfig.DelayMin > NConfig.LengthMax {
+				NConfig.DelayMin, NConfig.DelayMax = NConfig.LengthMax, NConfig.DelayMin
+			}
+		} else {
+			return nil, errors.New("DelayMin or DelayMax cannot be zero")
+		}
+
+	} else {
+		NConfig.DelayMin = 0
+		NConfig.DelayMax = 0
 	}
 	return NConfig, nil
 }

infra/conf/metrics.go

@@ -6,21 +6,15 @@ import (
 )
 
 type MetricsConfig struct {
-	Tag    string `json:"tag"`
+	Tag string `json:"tag"`
-	Listen string `json:"listen"`
 }
 
 func (c *MetricsConfig) Build() (*metrics.Config, error) {
-	if c.Listen == "" && c.Tag == "" {
-		return nil, errors.New("Metrics must have a tag or listen address.")
-	}
-	// If the tag is empty but have "listen" set a default "Metrics" for compatibility.
 	if c.Tag == "" {
-		c.Tag = "Metrics"
+		return nil, errors.New("metrics tag can't be empty.")
 	}
 
 	return &metrics.Config{
-		Tag:    c.Tag,
+		Tag: c.Tag,
-		Listen: c.Listen,
 	}, nil
 }