Feature: add process_path to script metadata

# Conflicts:
#	tunnel/statistic/tracker.go
#	tunnel/tunnel.go

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,76 @@
+name: Bug report
+description: Create a report to help us improve
+title: "[Bug] "
+body:
+  - type: checkboxes
+    id: ensure
+    attributes:
+      label: Verify steps
+      description: "
+在提交之前，请确认
+Please verify that you've followed these steps
+"
+      options:
+        - label: "
+如果你可以自己 debug 并解决的话，提交 PR 吧
+Is this something you can **debug and fix**? Send a pull request! Bug fixes and documentation fixes are welcome.
+"
+          required: true
+        - label: "
+我已经在 [Issue Tracker](……/) 中找过我要提出的问题
+I have searched on the [issue tracker](……/) for a related issue.
+"
+          required: true
+        - label: "
+我已经使用 dev 分支版本测试过，问题依旧存在
+I have tested using the dev branch, and the issue still exists.
+"
+          required: true
+        - label: "
+我已经仔细看过 [Documentation](https://github.com/Dreamacro/clash/wiki/) 并无法自行解决问题
+I have read the [documentation](https://github.com/Dreamacro/clash/wiki/) and was unable to solve the issue.
+"
+          required: true
+        - label: "
+这是 Clash 核心的问题，并非我所使用的 Clash 衍生版本（如 OpenClash、KoolClash 等）的特定问题
+This is an issue of the Clash core *per se*, not to the derivatives of Clash, like OpenClash or KoolClash.
+"
+          required: true
+  - type: input
+    attributes:
+      label: Clash version
+    validations:
+      required: true
+  - type: dropdown
+    id: os
+    attributes:
+      label: What OS are you seeing the problem on?
+      multiple: true
+      options:
+        - macOS
+        - Windows
+        - Linux
+        - OpenBSD/FreeBSD
+  - type: textarea
+    attributes:
+      render: yaml
+      label: "Clash config"
+      description: "
+在下方附上 Clash core 脱敏后配置文件的内容
+Paste the Clash core configuration below.
+"
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      render: shell
+      label: Clash log
+      description: "
+在下方附上 Clash Core 的日志，log level 使用 DEBUG
+Paste the Clash core log below with the log level set to `DEBUG`.
+"
+  - type: textarea
+    attributes:
+      label: Description
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,6 @@
+blank_issues_enabled: false
+
+contact_links:
+  - name: Get help in GitHub Discussions
+    url: https://github.com/Dreamacro/clash/discussions
+    about: Have a question? Not sure if your issue affects everyone reproducibly? The quickest way to get help is on Clash's GitHub Discussions!

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,36 @@
+name: Feature request
+description: Suggest an idea for this project
+title: "[Feature] "
+body:
+  - type: checkboxes
+    id: ensure
+    attributes:
+      label: Verify steps
+      description: "
+在提交之前，请确认
+Please verify that you've followed these steps
+"
+      options:
+        - label: "
+我已经在 [Issue Tracker](……/) 中找过我要提出的请求
+I have searched on the [issue tracker](……/) for a related feature request.
+"
+          required: true
+        - label: "
+我已经仔细看过 [Documentation](https://github.com/Dreamacro/clash/wiki/) 并无法自行解决问题
+I have read the [documentation](https://github.com/Dreamacro/clash/wiki/) and was unable to solve the issue.
+"
+          required: true
+  - type: textarea
+    attributes:
+      label: Description
+      description: 请详细、清晰地表达你要提出的论述，例如这个问题如何影响到你？你想实现什么功能？目前 Clash Core 的行为是什麽？
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Possible Solution
+      description: "
+此项非必须，但是如果你有想法的话欢迎提出。
+Not obligatory, but suggest a fix/reason for the bug, or ideas how to implement the addition or change
+"

.github/workflows/build-windows-amd.yml

@@ -0,0 +1,75 @@
+name: Build-Windows
+on: [push]
+jobs:
+  build:
+    runs-on: windows-latest
+    steps:
+      - name: Setup Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.18.x
+
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v3
+
+      - name: Go cache paths
+        id: go-cache-paths
+        run: |
+          echo "::set-output name=go-build::$(go env GOCACHE)"
+          echo "::set-output name=go-mod::$(go env GOMODCACHE)"
+
+      - name: Cache go module
+        uses: actions/cache@v2
+        with:
+          path: |
+            ${{ steps.go-cache-paths.outputs.go-mod }}
+            ${{ steps.go-cache-paths.outputs.go-build }}
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Setup Python
+        uses: actions/setup-python@v3
+        with:
+          python-version: '3.9'
+          architecture: 'x64'
+
+      - name: Get dependencies, run test
+        id: test
+        run: |
+          cmd /c mklink /J D:\python-amd64 $env:pythonLocation
+          
+          echo "::set-output name=file_sha::$(git describe --tags --always)"
+          echo "::set-output name=file_date::$(Get-Date -Format 'yyyyMMdd')"
+          
+          ((Get-Content -path constant/version.go -Raw) -replace 'unknown version',$(git describe --tags --always)) | Set-Content -Path constant/version.go
+          ((Get-Content -path constant/version.go -Raw) -replace 'unknown time',$(Get-Date)) | Set-Content -Path constant/version.go
+          
+          # go test
+          go test -tags build_actions ./...
+
+      - name: Build
+        #if: startsWith(github.ref, 'refs/tags/')
+        run: |
+          $env:CGO_ENABLED=1; go build -tags build_actions -trimpath -ldflags '-w -s -buildid=' -o bin/clash-windows-amd64.exe
+          $env:GOAMD64="v3"; $env:CGO_ENABLED=1; go build -tags build_actions -trimpath -ldflags '-w -s -buildid=' -o bin/clash-windows-amd64-v3.exe
+          
+          cd bin/
+          Compress-Archive -Path clash-windows-amd64.exe -DestinationPath clash-plus-windows-amd64-$(git describe --tags --always)-$(Get-Date -Format 'yyyy.MM.dd').zip
+          Compress-Archive -Path clash-windows-amd64-v3.exe -DestinationPath clash-plus-windows-amd64-v3-$(git describe --tags --always)-$(Get-Date -Format 'yyyy.MM.dd').zip
+          Remove-Item -Force clash-windows-amd64.exe
+          Remove-Item -Force clash-windows-amd64-v3.exe
+
+      - name: Upload files to Artifacts
+        uses: actions/upload-artifact@v2
+        if: startsWith(github.ref, 'refs/tags/') == false
+        with:
+          name: clash-windows-amd64-${{ steps.test.outputs.file_sha }}-${{ steps.test.outputs.file_date }}
+          path: |
+            bin/*
+
+      - name: Delete workflow runs
+        uses: GitRML/delete-workflow-runs@main
+        with:
+          retain_days: 1
+          keep_minimum_runs: 2

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,29 @@
+name: CodeQL
+
+on:
+  push:
+    branches: [ rm ]
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: ['go']
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v3
+
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      with:
+        languages: ${{ matrix.language }}
+
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v1
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1

.github/workflows/docker.yml

@@ -0,0 +1,80 @@
+name: Publish Docker Image
+on:
+  push:
+    branches:
+      - rm
+    tags:
+      - '*'
+jobs:
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+        with:
+          platforms: all
+
+      - name: Set up docker buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+        with:
+          version: latest
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+      
+      - name: Login to Github Package
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: Dreamacro
+          password: ${{ secrets.PACKAGE_TOKEN }}
+
+      - name: Build dev branch and push
+        if: github.ref == 'refs/heads/dev'
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64
+          push: true
+          tags: 'dreamacro/clash:dev,ghcr.io/dreamacro/clash:dev'
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Get all docker tags
+        if: startsWith(github.ref, 'refs/tags/')
+        uses: actions/github-script@v6
+        id: tags
+        with:
+          script: |
+            const ref = context.payload.ref.replace(/\/?refs\/tags\//, '')
+            const tags = [
+              'dreamacro/clash:latest',
+              `dreamacro/clash:${ref}`,
+              'ghcr.io/dreamacro/clash:latest',
+              `ghcr.io/dreamacro/clash:${ref}`
+            ]
+            return tags.join(',')
+          result-encoding: string
+
+      - name: Build release and push
+        if: startsWith(github.ref, 'refs/tags/')
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64
+          push: true
+          tags: ${{steps.tags.outputs.result}}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

.github/workflows/linter.yml

@@ -0,0 +1,23 @@
+name: Linter
+on: [push, pull_request]
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Get latest go version
+        id: version
+        run: |
+          echo ::set-output name=go_version::$(curl -s https://raw.githubusercontent.com/actions/go-versions/main/versions-manifest.json | grep -oE '"version": "[0-9]{1}.[0-9]{1,}(.[0-9]{1,})?"' | head -1 | cut -d':' -f2 | sed 's/ //g; s/"//g')
+
+      - name: Setup Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ steps.version.outputs.go_version }}
+
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v3
+        with:
+          version: latest
+          args: --build-tags=build_local

.github/workflows/release.yml

@@ -0,0 +1,120 @@
+name: Release
+on:
+  push:
+    branches:
+      - rm
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Get latest go version
+        id: version
+        run: |
+          echo ::set-output name=go_version::$(curl -s https://raw.githubusercontent.com/actions/go-versions/main/versions-manifest.json | grep -oE '"version": "[0-9]{1}.[0-9]{1,}(.[0-9]{1,})?"' | head -1 | cut -d':' -f2 | sed 's/ //g; s/"//g')
+
+      - name: Setup Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ steps.version.outputs.go_version }}
+
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v3
+
+      - name: Go cache paths
+        id: go-cache-paths
+        run: |
+          echo "::set-output name=go-build::$(go env GOCACHE)"
+          echo "::set-output name=go-mod::$(go env GOMODCACHE)"
+
+      - name: Cache go module
+        uses: actions/cache@v2
+        with:
+          path: |
+            ${{ steps.go-cache-paths.outputs.go-mod }}
+            ${{ steps.go-cache-paths.outputs.go-build }}
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3.9'
+
+      - name: Get dependencies, run test
+        run: |
+          # fetch python cross compile source files
+          mkdir -p bin/python/
+          cd bin/python/
+          curl -LO https://raw.githubusercontent.com/yaling888/snack/main/python-3.9.7-darwin-amd64.tar.xz
+          curl -LO https://raw.githubusercontent.com/yaling888/snack/main/python-3.9.7-darwin-arm64.tar.xz
+          curl -LO https://raw.githubusercontent.com/yaling888/snack/main/python-3.9.7-windows-amd64.tar.xz
+          curl -LO https://raw.githubusercontent.com/yaling888/snack/main/python-3.9.7-windows-386.tar.xz
+          #curl -LO https://raw.githubusercontent.com/yaling888/snack/main/python-3.9.7-linux-amd64.tar.xz
+          #curl -LO https://raw.githubusercontent.com/yaling888/snack/main/python-3.9.7-linux-arm64.tar.xz
+          #curl -LO https://raw.githubusercontent.com/yaling888/snack/main/python-3.9.7-linux-386.tar.xz
+          tar -Jxf python-3.9.7-darwin-amd64.tar.xz
+          tar -Jxf python-3.9.7-darwin-arm64.tar.xz
+          tar -Jxf python-3.9.7-windows-amd64.tar.xz
+          tar -Jxf python-3.9.7-windows-386.tar.xz
+          #tar -Jxf python-3.9.7-linux-amd64.tar.xz
+          #tar -Jxf python-3.9.7-linux-arm64.tar.xz
+          #tar -Jxf python-3.9.7-linux-386.tar.xz
+          rm python-3.9.7-*.tar.xz
+          cd ../../
+
+          # go test
+          go test -tags build_local ./...
+
+          # init xgo
+          docker pull techknowlogick/xgo:latest
+          go install src.techknowlogick.com/xgo@latest
+
+      - name: Build
+        #if: startsWith(github.ref, 'refs/tags/')
+        env:
+          NAME: clash
+          BINDIR: bin
+        run: |
+          make -j releases
+          #ls -lahF bin/python/
+
+      - name: Prepare upload
+        if: startsWith(github.ref, 'refs/tags/') == false
+        run: |
+          rm -rf bin/python/
+          echo "FILE_DATE=_$(date +"%Y%m%d%H%M")" >> $GITHUB_ENV
+          echo "FILE_SHA=$(git describe --tags --always 2>/dev/null)" >> $GITHUB_ENV
+
+      - name: Upload files to Artifacts
+        uses: actions/upload-artifact@v2
+        if: startsWith(github.ref, 'refs/tags/') == false
+        with:
+          name: clash_${{ env.FILE_SHA }}${{ env.FILE_DATE }}
+          path: |
+            bin/*
+
+      - name: Upload Release
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: bin/*
+          draft: true
+          prerelease: true
+          generate_release_notes: true
+
+      - name: Delete workflow runs
+        uses: GitRML/delete-workflow-runs@main
+        with:
+          retain_days: 1
+          keep_minimum_runs: 2
+
+      - name: Remove old Releases
+        uses: dev-drprasad/delete-older-releases@v0.2.0
+        if: startsWith(github.ref, 'refs/tags/') && !cancelled()
+        with:
+          keep_latest: 1
+          delete_tags: true
+          delete_tag_pattern: plus-pro
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/stale.yml

@@ -0,0 +1,19 @@
+  
+name: Mark stale issues and pull requests
+
+on:
+  push:
+    branches:
+      - rm
+
+jobs:
+  stale:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/stale@v5
+        with:
+          stale-issue-message: 'This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 5 days'
+          days-before-stale: 60
+          days-before-close: 5

.gitignore

@@ -12,5 +12,14 @@ bin/*
 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out
 
-# dep
+# go mod vendor
 vendor
+
+# GoLand
+.idea/*
+
+# macOS file
+.DS_Store
+
+# test suite
+test/config/cache*

.golangci.yaml

@@ -0,0 +1,16 @@
+linters:
+  disable-all: true
+  enable:
+    - gofumpt
+    - staticcheck
+    - govet
+    - gci
+
+linters-settings:
+  gci:
+    sections:
+      - standard
+      - prefix(github.com/Dreamacro/clash)
+      - default
+  staticcheck:
+    go: '1.18'

.travis.yml

@@ -1,26 +0,0 @@
-language: go
-sudo: false
-go:
-  - '1.12'
-install:
-  - "go mod download"
-env:
-  global:
-    - NAME=clash
-    - BINDIR=bin
-    - GO111MODULE=on
-script:
-  - go test ./...
-before_deploy: make -j releases
-deploy:
-  provider: releases
-  prerelease: true
-  skip_cleanup: true
-  api_key:
-    secure: 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
-  file: bin/*
-  file_glob: true
-  on:
-    repo: Dreamacro/clash
-    branch: master
-    tags: true

Dockerfile

@@ -1,23 +1,18 @@
-FROM golang:latest as builder
+FROM golang:alpine as builder
-
-RUN wget http://geolite.maxmind.com/download/geoip/database/GeoLite2-Country.tar.gz -O /tmp/GeoLite2-Country.tar.gz && \
-    tar zxvf /tmp/GeoLite2-Country.tar.gz -C /tmp && \
-    mv /tmp/GeoLite2-Country_*/GeoLite2-Country.mmdb /Country.mmdb
 
+RUN apk add --no-cache make git && \
+    wget -O /Country.mmdb https://github.com/Dreamacro/maxmind-geoip/releases/latest/download/Country.mmdb
 WORKDIR /clash-src
-
+COPY --from=tonistiigi/xx:golang / /
 COPY . /clash-src
-
 RUN go mod download && \
-    GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags '-w -s' -o /clash
+    make docker && \
+    mv ./bin/clash-docker /clash
 
 FROM alpine:latest
+LABEL org.opencontainers.image.source="https://github.com/Dreamacro/clash"
 
-RUN apk add --no-cache ca-certificates
+RUN apk add --no-cache ca-certificates tzdata
-
 COPY --from=builder /Country.mmdb /root/.config/clash/
 COPY --from=builder /clash /
-
-EXPOSE 7890 7891
-
 ENTRYPOINT ["/clash"]

LICENSE

@@ -1,21 +1,674 @@
-MIT License
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
 
-Copyright (c) 2018 Dreamacro
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
+                            Preamble
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
 
-The above copyright notice and this permission notice shall be included in all
+  The GNU General Public License is a free, copyleft license for
-copies or substantial portions of the Software.
+software and other kinds of works.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  The licenses for most software and other practical works are designed
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+to take away your freedom to share and change the works.  By contrast,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+the GNU General Public License is intended to guarantee your freedom to
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+share and change all versions of a program--to make sure it remains free
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+software for all its users.  We, the Free Software Foundation, use the
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+GNU General Public License for most of our software; it applies also to
-SOFTWARE.
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
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+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

Makefile

@@ -1,80 +1,70 @@
+GOCMD=go
+XGOCMD=xgo -go=go-1.18.x
+GOBUILD=CGO_ENABLED=1 $(GOCMD) build -trimpath
+GOCLEAN=$(GOCMD) clean
 NAME=clash
-BINDIR=bin
+BINDIR=$(shell pwd)/bin
-VERSION=$(shell git describe --tags || echo "unkown version")
+VERSION=$(shell git describe --tags --always 2>/dev/null ||  date +%F)
 BUILDTIME=$(shell date -u)
-GOBUILD=CGO_ENABLED=0 go build -ldflags '-X "github.com/Dreamacro/clash/constant.Version=$(VERSION)" \
+BUILD_PACKAGE=.
-		-X "github.com/Dreamacro/clash/constant.BuildTime=$(BUILDTIME)" \
+RELEASE_LDFLAGS='-X "github.com/Dreamacro/clash/constant.Version=$(VERSION)" \
-		-w -s'
+                		-X "github.com/Dreamacro/clash/constant.BuildTime=$(BUILDTIME)" \
+                		-w -s -buildid='
+STATIC_LDFLAGS='-X "github.com/Dreamacro/clash/constant.Version=$(VERSION)" \
+               		-X "github.com/Dreamacro/clash/constant.BuildTime=$(BUILDTIME)" \
+               		-extldflags "-static" \
+               		-w -s -buildid='
 
 PLATFORM_LIST = \
 	darwin-amd64 \
-	linux-386 \
+	darwin-arm64 \
-	linux-amd64 \
+	linux-amd64
-	linux-armv5 \
+#	linux-arm64
-	linux-armv6 \
+#	linux-386
-	linux-armv7 \
-	linux-armv8 \
-	linux-mips-softfloat \
-	linux-mips-hardfloat \
-	linux-mipsle \
-	linux-mips64 \
-	linux-mips64le \
-	freebsd-386 \
-	freebsd-amd64
 
 WINDOWS_ARCH_LIST = \
-	windows-386 \
+	windows-amd64 \
-	windows-amd64
+	windows-386
+#	windows-arm64
 
 all: linux-amd64 darwin-amd64 windows-amd64 # Most used
 
+local:
+	$(GOBUILD) -ldflags $(RELEASE_LDFLAGS) -tags build_local -o $(BINDIR)/$(NAME)-$@
+
+local-v3:
+	 GOAMD64=v3 $(GOBUILD) -ldflags $(RELEASE_LDFLAGS) -tags build_local -o $(BINDIR)/$(NAME)-$@
+
 darwin-amd64:
-	GOARCH=amd64 GOOS=darwin $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
+	$(XGOCMD) -dest=$(BINDIR) -out=$(NAME) -trimpath=true -ldflags=$(RELEASE_LDFLAGS) -targets=darwin-10.12/amd64 $(BUILD_PACKAGE) && \
+	mv $(BINDIR)/$(NAME)-darwin-10.12-amd64 $(BINDIR)/$(NAME)-darwin-amd64
+
+darwin-arm64:
+	$(XGOCMD) -dest=$(BINDIR) -out=$(NAME) -trimpath=true -ldflags=$(RELEASE_LDFLAGS) -targets=darwin-11.1/arm64 $(BUILD_PACKAGE) && \
+	mv $(BINDIR)/$(NAME)-darwin-11.1-arm64 $(BINDIR)/$(NAME)-darwin-arm64
 
 linux-386:
-	GOARCH=386 GOOS=linux $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
+	$(XGOCMD) -dest=$(BINDIR) -out=$(NAME) -trimpath=true -ldflags=$(STATIC_LDFLAGS) -targets=linux/386 $(BUILD_PACKAGE)
 
 linux-amd64:
-	GOARCH=amd64 GOOS=linux $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
+	$(GOBUILD) -ldflags $(RELEASE_LDFLAGS) -o $(BINDIR)/$(NAME)-$@
+	#GOARCH=amd64 GOOS=linux $(GOBUILD) -ldflags $(RELEASE_LDFLAGS) -o $(BINDIR)/$(NAME)-$@
+	#$(XGOCMD) -dest=$(BINDIR) -out=$(NAME) -trimpath=true -ldflags=$(STATIC_LDFLAGS) -targets=linux/amd64 $(BUILD_PACKAGE)
 
-linux-armv5:
+linux-arm64:
-	GOARCH=arm GOOS=linux GOARM=5 $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
+	$(XGOCMD) -dest=$(BINDIR) -out=$(NAME) -trimpath=true -ldflags=$(STATIC_LDFLAGS) -targets=linux/arm64 $(BUILD_PACKAGE)
-
-linux-armv6:
-	GOARCH=arm GOOS=linux GOARM=6 $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
-
-linux-armv7:
-	GOARCH=arm GOOS=linux GOARM=7 $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
-
-linux-armv8:
-	GOARCH=arm64 GOOS=linux $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
-
-linux-mips-softfloat:
-	GOARCH=mips GOMIPS=softfloat GOOS=linux $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
-
-linux-mips-hardfloat:
-	GOARCH=mips GOMIPS=hardfloat GOOS=linux $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
-
-linux-mipsle:
-	GOARCH=mipsle GOOS=linux $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
-
-linux-mips64:
-	GOARCH=mips64 GOOS=linux $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
-
-linux-mips64le:
-	GOARCH=mips64le GOOS=linux $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
-
-freebsd-386:
-	GOARCH=386 GOOS=freebsd $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
-
-freebsd-amd64:
-	GOARCH=amd64 GOOS=freebsd $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
 
 windows-386:
-	GOARCH=386 GOOS=windows $(GOBUILD) -o $(BINDIR)/$(NAME)-$@.exe
+	$(XGOCMD) -dest=$(BINDIR) -out=$(NAME) -trimpath=true -ldflags=$(RELEASE_LDFLAGS) -targets=windows-6.0/386 $(BUILD_PACKAGE) && \
+	mv $(BINDIR)/$(NAME)-windows-6.0-386.exe $(BINDIR)/$(NAME)-windows-386.exe
 
 windows-amd64:
-	GOARCH=amd64 GOOS=windows $(GOBUILD) -o $(BINDIR)/$(NAME)-$@.exe
+	$(XGOCMD) -dest=$(BINDIR) -out=$(NAME) -trimpath=true -ldflags=$(RELEASE_LDFLAGS) -targets=windows-6.0/amd64 $(BUILD_PACKAGE) && \
+	mv $(BINDIR)/$(NAME)-windows-6.0-amd64.exe $(BINDIR)/$(NAME)-windows-amd64.exe
+
+#windows-arm64:
+#	$(XGOCMD) -dest=$(BINDIR) -out=$(NAME) -trimpath=true -ldflags=$(RELEASE_LDFLAGS) -targets=windows/arm64 $(BUILD_PACKAGE)
+#	mv $(NAME)-windows-4.0-arm64.exe $(NAME)-windows-arm64.exe
 
 gz_releases=$(addsuffix .gz, $(PLATFORM_LIST))
 zip_releases=$(addsuffix .zip, $(WINDOWS_ARCH_LIST))
@@ -89,5 +79,19 @@ $(zip_releases): %.zip : %
 all-arch: $(PLATFORM_LIST) $(WINDOWS_ARCH_LIST)
 
 releases: $(gz_releases) $(zip_releases)
+
+vet:
+	$(GOCMD) test -tags build_local ./...
+
+lint:
+	golangci-lint run --build-tags=build_local ./...
+
 clean:
-	rm $(BINDIR)/*
+	rm -rf $(BINDIR)/
+	mkdir -p $(BINDIR)
+
+cleancache:
+	# go build cache may need to cleanup if changing C source code
+	$(GOCLEAN) -cache
+	rm -rf $(BINDIR)/
+	mkdir -p $(BINDIR)

README.md

@@ -6,233 +6,383 @@
 <h4 align="center">A rule-based tunnel in Go.</h4>
 
 <p align="center">
-  <a href="https://travis-ci.org/Dreamacro/clash">
+  <a href="https://github.com/Dreamacro/clash/actions">
-    <img src="https://img.shields.io/travis/Dreamacro/clash.svg?style=flat-square"
+    <img src="https://img.shields.io/github/workflow/status/Dreamacro/clash/Go?style=flat-square" alt="Github Actions">
-         alt="Travis-CI">
   </a>
   <a href="https://goreportcard.com/report/github.com/Dreamacro/clash">
     <img src="https://goreportcard.com/badge/github.com/Dreamacro/clash?style=flat-square">
   </a>
+  <img src="https://img.shields.io/github/go-mod/go-version/Dreamacro/clash?style=flat-square">
   <a href="https://github.com/Dreamacro/clash/releases">
     <img src="https://img.shields.io/github/release/Dreamacro/clash/all.svg?style=flat-square">
   </a>
+  <a href="https://github.com/Dreamacro/clash/releases/tag/premium">
+    <img src="https://img.shields.io/badge/release-Premium-00b4f0?style=flat-square">
+  </a>
 </p>
 
 ## Features
 
-- HTTP/HTTPS and SOCKS protocol
+- Local HTTP/HTTPS/SOCKS server with authentication support
-- Surge like configuration
+- VMess, Shadowsocks, Trojan, Snell protocol support for remote connections
-- GeoIP rule support
+- Built-in DNS server that aims to minimize DNS pollution attack impact, supports DoH/DoT upstream and fake IP.
-- Support Vmess/Shadowsocks/Socks5
+- Rules based off domains, GEOIP, IPCIDR or Process to forward packets to different nodes
-- Support for Netfilter TCP redirect
+- Remote groups allow users to implement powerful rules. Supports automatic fallback, load balancing or auto select node based off latency
+- Remote providers, allowing users to get node lists remotely instead of hardcoding in config
+- Netfilter TCP redirecting. Deploy Clash on your Internet gateway with `iptables`.
+- Comprehensive HTTP RESTful API controller
 
-## Install
+## Getting Started
+Documentations are now moved to [GitHub Wiki](https://github.com/Dreamacro/clash/wiki).
 
-You can build from source:
+## Advanced usage for this branch
+### Build
+This branch requires cgo and Python3.9, so make sure you set up Python3.9 before building.
 
-```sh
+For example, build on macOS:
-go get -u -v github.com/Dreamacro/clash
+```shell
+brew update
+brew install python@3.9
+
+export PKG_CONFIG_PATH=$(find /usr/local/Cellar -name 'pkgconfig' -type d | grep lib/pkgconfig | tr '\n' ':' | sed s/.$//)
+
+git clone -b plus-pro https://github.com/yaling888/clash.git
+cd clash
+
+# build
+make cleancache && make local 
+# or make local-v3
+
+ls bin/
+
+# run
+sudo bin/clash-local
 ```
 
-Pre-built binaries are available: [release](https://github.com/Dreamacro/clash/releases)
+### MITM configuration
+A root CA certificate is required, the 
+MITM proxy server will generate a CA certificate file and a CA private key file in your Clash home directory, you can use your own certificate replace it. 
 
-Requires Go >= 1.12.
+Need to install and trust the CA certificate on the client device, open this URL [http://mitm.clash/cert.crt](http://mitm.clash/cert.crt) by the web browser to install the CA certificate, the host name 'mitm.clash' was always been hijacked.
 
-Checkout Clash version:
+NOTE: this feature cannot work on tls pinning
 
-```sh
+WARNING: DO NOT USE THIS FEATURE TO BREAK LOCAL LAWS
-clash -v
+
+```yaml
+# Port of MITM proxy server on the local end
+mitm-port: 7894
+
+# Man-In-The-Middle attack
+mitm:
+  hosts: # use for others proxy type. E.g: TUN, socks
+    - +.example.com
+  rules: # rewrite rules
+    - '^https?://www\.example\.com/1 url reject' # The "reject" returns HTTP status code 404 with no content.
+    - '^https?://www\.example\.com/2 url reject-200' # The "reject-200" returns HTTP status code 200 with no content.
+    - '^https?://www\.example\.com/3 url reject-img' # The "reject-img" returns HTTP status code 200 with content of 1px png.
+    - '^https?://www\.example\.com/4 url reject-dict' # The "reject-dict" returns HTTP status code 200 with content of empty json object.
+    - '^https?://www\.example\.com/5 url reject-array' # The "reject-array" returns HTTP status code 200 with content of empty json array.
+    - '^https?://www\.example\.com/(6) url 302 https://www.example.com/new-$1'
+    - '^https?://www\.(example)\.com/7 url 307 https://www.$1.com/new-7'
+    - '^https?://www\.example\.com/8 url request-header (\r\n)User-Agent:.+(\r\n) request-header $1User-Agent: haha-wriohoh$2' # The "request-header" works for all the http headers not just one single header, so you can match two or more headers including CRLF in one regular expression.
+    - '^https?://www\.example\.com/9 url request-body "pos_2":\[.*\],"pos_3" request-body "pos_2":[{"xx": "xx"}],"pos_3"'
+    - '^https?://www\.example\.com/10 url response-header (\r\n)Tracecode:.+(\r\n) response-header $1Tracecode: 88888888888$2'
+    - '^https?://www\.example\.com/11 url response-body "errmsg":"ok" response-body "errmsg":"not-ok"'
 ```
 
-## Daemon
+### DNS configuration
+Support resolve ip with a proxy tunnel.
 
-Unfortunately, there is no native elegant way to implement golang's daemon.
+Support `geosite` with `fallback-filter`.
 
-So we can use third-party daemon tools like pm2, supervisor, and so on.
+Use `curl -X POST controllerip:port/cache/fakeip/flush` to flush persistence fakeip
+ ```yaml
+ dns:
+   enable: true
+   use-hosts: true
+   ipv6: false
+   enhanced-mode: fake-ip
+   fake-ip-range: 198.18.0.1/16
+   listen: 127.0.0.1:6868
+   default-nameserver:
+     - 119.29.29.29
+     - 114.114.114.114
+   nameserver:
+     - https://doh.pub/dns-query
+     - tls://223.5.5.5:853
+   fallback:
+     - 'https://1.0.0.1/dns-query#Proxy'  # append the proxy adapter name to the end of DNS URL with '#' prefix.
+     - 'tls://8.8.4.4:853#Proxy'
+   fallback-filter:
+     geoip: false
+     geosite:
+       - gfw  # `geosite` filter only use fallback server to resolve ip, prevent DNS leaks to untrusted DNS providers.
+     domain:
+       - +.example.com
+     ipcidr:
+       - 0.0.0.0/32
+ ```
 
-In the case of [pm2](https://github.com/Unitech/pm2), we can start the daemon this way:
+### TUN configuration
+Supports macOS, Linux and Windows.
 
-```sh
+On Windows, you should download the [Wintun](https://www.wintun.net) driver and copy `wintun.dll` into the system32 directory.
-pm2 start clash
+```yaml
+# Enable the TUN listener
+tun:
+  enable: true
+  stack: gvisor # System or gVisor
+  # device: tun://utun8 # or fd://xxx, it's optional
+  dns-hijack: 
+    - 0.0.0.0:53 # hijack all public
+  auto-route: true # auto set global route
+```
+### Rules configuration
+- Support rule `GEOSITE`.
+- Support rule `USER-AGENT`.
+- Support `multiport` condition for rule `SRC-PORT` and `DST-PORT`.
+- Support `network` condition for all rules.
+- Support `process` condition for all rules.
+- Support source IPCIDR condition for all rules, just append to the end.
+
+The `GEOIP` databases via [https://github.com/Loyalsoldier/geoip](https://raw.githubusercontent.com/Loyalsoldier/geoip/release/Country.mmdb).
+
+The `GEOSITE` databases via [https://github.com/Loyalsoldier/v2ray-rules-dat](https://github.com/Loyalsoldier/v2ray-rules-dat/releases/latest/download/geosite.dat).
+```yaml
+mode: rule
+
+script:
+  shortcuts:
+    quic: 'network == "udp" and dst_port == 443'
+    privacy: '"analytics" in host or "adservice" in host or "firebase" in host or "safebrowsing" in host or "doubleclick" in host'
+
+rules:
+  # rule SCRIPT
+  - SCRIPT,quic,REJECT # Disable QUIC, same as rule "DST-PORT,443,REJECT,udp"
+  - SCRIPT,privacy,REJECT
+    
+  # network condition for all rules
+  - DOMAIN-SUFFIX,example.com,DIRECT,tcp
+  - DOMAIN-SUFFIX,example.com,REJECT,udp
+
+  # process condition for all rules (add 'P:' prefix)
+  - DOMAIN-SUFFIX,example.com,REJECT,P:Google Chrome Helper
+
+  # multiport condition for rules SRC-PORT and DST-PORT
+  - DST-PORT,123/136/137-139,DIRECT,udp
+
+  # USER-AGENT payload cannot include the comma character, '*' meaning any character.
+  - USER-AGENT,*example*,PROXY
+
+  # rule GEOSITE
+  - GEOSITE,category-ads-all,REJECT
+  - GEOSITE,icloud@cn,DIRECT
+  - GEOSITE,apple@cn,DIRECT
+  - GEOSITE,apple-cn,DIRECT
+  - GEOSITE,microsoft@cn,DIRECT
+  - GEOSITE,facebook,PROXY
+  - GEOSITE,youtube,PROXY
+  - GEOSITE,geolocation-cn,DIRECT
+  - GEOSITE,geolocation-!cn,PROXY
+
+  # source IPCIDR condition for all rules in gateway proxy
+  #- GEOSITE,geolocation-!cn,REJECT,192.168.1.88/32,192.168.1.99/32
+  
+  - GEOIP,telegram,PROXY,no-resolve
+  - GEOIP,lan,DIRECT,no-resolve
+  - GEOIP,cn,DIRECT
+
+  - MATCH,PROXY
 ```
 
-If you have Docker installed, you can run clash directly using `docker-compose`.
+### Script configuration
+Script enables users to programmatically select a policy for the packets with more flexibility.
 
-[Run clash in docker](https://github.com/Dreamacro/clash/wiki/Run-clash-in-docker)
+```yaml
+mode: script
 
-## Config
+rules:
+  # the rule GEOSITE just as a rule provider in mode script
+  - GEOSITE,category-ads-all,Whatever
+  - GEOSITE,youtube,Whatever
+  - GEOSITE,geolocation-cn,Whatever
+  
+script:
+  code: |
+    def main(ctx, metadata):
+      if metadata["process_name"] == 'apsd':
+        return "DIRECT"
 
-The default configuration directory is `$HOME/.config/clash`
+      if metadata["network"] == 'udp' and metadata["dst_port"] == 443:
+        return "REJECT"
+    
+      host = metadata["host"]
+      for kw in ['analytics', 'adservice', 'firebase', 'bugly', 'safebrowsing', 'doubleclick']:
+        if kw in host:
+          return "REJECT"
+    
+      now = time.now()
+      if (now.hour < 8 or now.hour > 17) and metadata["src_ip"] == '192.168.1.99':
+        return "REJECT"
+      
+      if ctx.rule_providers["geosite:category-ads-all"].match(metadata):
+        return "REJECT"
+    
+      if ctx.rule_providers["geosite:youtube"].match(metadata):
+        ctx.log('[Script] domain %s matched youtube' % host)
+        return "Proxy"
 
-The name of the configuration file is `config.yml`
+      if ctx.rule_providers["geosite:geolocation-cn"].match(metadata):
+        ctx.log('[Script] domain %s matched geolocation-cn' % host)
+        return "DIRECT"
+    
+      ip = metadata["dst_ip"] 
+      if host != "":
+        ip = ctx.resolve_ip(host)
+        if ip == "":
+          return "Proxy"
 
-If you want to use another directory, you can use `-d` to control the configuration directory
+      code = ctx.geoip(ip)
+      if code == "LAN" or code == "CN":
+        return "DIRECT"
 
-For example, you can use the current directory as the configuration directory
+      return "Proxy" # default policy for requests which are not matched by any other script
+```
+the context and metadata
+```ts
+interface Metadata {
+  type: string // socks5、http
+  network: string // tcp
+  host: string
+  process_name: string
+  process_path: string
+  src_ip: string
+  src_port: int
+  dst_ip: string
+  dst_port: int
+}
 
-```sh
+interface Context {
-clash -d .
+  resolve_ip: (host: string) => string // ip string
+  geoip: (ip: string) => string // country code
+  log: (log: string) => void
+  rule_providers: Record<string, { match: (metadata: Metadata) => boolean }>
+}
 ```
 
-Below is a simple demo configuration file:
+### Proxies configuration
+Support outbound protocol `VLESS`.
 
-```yml
+Support `Trojan` with XTLS.
-# port of HTTP
-port: 7890
 
-# port of SOCKS5
+Currently XTLS only supports TCP transport.
-socks-port: 7891
+```yaml
-
+proxies:
-# redir port for Linux and macOS
+  # VLESS
-# redir-port: 7892
+  - name: "vless-tls"
-
+    type: vless
-allow-lan: false
+    server: server
-
+    port: 443
-# Rule / Global/ Direct (default is Rule)
+    uuid: uuid
-mode: Rule
+    network: tcp
-
+    servername: example.com
-# set log level to stdout (default is info)
+    udp: true
-# info / warning / error / debug / silent
+    # skip-cert-verify: true
-log-level: info
+  - name: "vless-xtls"
-
+    type: vless
-# A RESTful API for clash
+    server: server
-external-controller: 127.0.0.1:9090
+    port: 443
-
+    uuid: uuid
-# you can put the static web resource (such as clash-dashboard) to a directory, and clash would serve in `${API}/ui`
+    network: tcp
-# input is a relative path to the configuration directory or an absolute path
+    servername: example.com
-# external-ui: folder
+    flow: xtls-rprx-direct # or xtls-rprx-origin
-
+    # flow-show: true # print the XTLS direction log
-# Secret for RESTful API (Optional)
+    # udp: true
-# secret: ""
-
-# experimental feature
-experimental:
-  ignore-resolve-fail: true # ignore dns reslove fail, default value is true
-
-# dns:
-  # enable: true # set true to enable dns (default is false)
-  # ipv6: false # default is false
-  # listen: 0.0.0.0:53
-  # enhanced-mode: redir-host # or fake-ip
-  # # fake-ip-range: 198.18.0.1/16 # if you don't know what it is, don't change it
-  # nameserver:
-  #   - 114.114.114.114
-  #   - tls://dns.rubyfish.cn:853 # dns over tls
-  # fallback: # concurrent request with nameserver, fallback used when GEOIP country isn't CN
-  #   - tcp://1.1.1.1
-
-Proxy:
-
-# shadowsocks
-# The types of cipher are consistent with go-shadowsocks2
-# support AEAD_AES_128_GCM AEAD_AES_192_GCM AEAD_AES_256_GCM AEAD_CHACHA20_POLY1305 AES-128-CTR AES-192-CTR AES-256-CTR AES-128-CFB AES-192-CFB AES-256-CFB CHACHA20-IETF XCHACHA20
-# In addition to what go-shadowsocks2 supports, it also supports chacha20 rc4-md5 xchacha20-ietf-poly1305
-- { name: "ss1", type: ss, server: server, port: 443, cipher: AEAD_CHACHA20_POLY1305, password: "password", udp: true }
-
-# old obfs configuration remove after prerelease
-- name: "ss2"
-  type: ss
-  server: server
-  port: 443
-  cipher: AEAD_CHACHA20_POLY1305
-  password: "password"
-  plugin: obfs
-  plugin-opts:
-    mode: tls # or http
-    # host: bing.com
-
-- name: "ss3"
-  type: ss
-  server: server
-  port: 443
-  cipher: AEAD_CHACHA20_POLY1305
-  password: "password"
-  plugin: v2ray-plugin
-  plugin-opts:
-    mode: websocket # no QUIC now
-    # tls: true # wss
     # skip-cert-verify: true
-    # host: bing.com
-    # path: "/"
-    # headers:
-    #   custom: value
 
-# vmess
+  # Trojan
-# cipher support auto/aes-128-gcm/chacha20-poly1305/none
+  - name: "trojan-xtls"
-- { name: "vmess", type: vmess, server: server, port: 443, uuid: uuid, alterId: 32, cipher: auto }
+    type: trojan
-# with tls
+    server: server
-- { name: "vmess", type: vmess, server: server, port: 443, uuid: uuid, alterId: 32, cipher: auto, tls: true }
+    port: 443
-# with tls and skip-cert-verify
+    password: yourpsk
-- { name: "vmess", type: vmess, server: server, port: 443, uuid: uuid, alterId: 32, cipher: auto, tls: true, skip-cert-verify: true }
+    network: tcp
-# with ws-path and ws-headers
+    flow: xtls-rprx-direct # or xtls-rprx-origin
-- { name: "vmess", type: vmess, server: server, port: 443, uuid: uuid, alterId: 32, cipher: auto, network: ws, ws-path: /path, ws-headers: { Host: v2ray.com } }
+    # flow-show: true # print the XTLS direction log
-# with ws + tls
+    # udp: true
-- { name: "vmess", type: vmess, server: server, port: 443, uuid: uuid, alterId: 32, cipher: auto, network: ws, ws-path: /path, tls: true }
+    # sni: example.com # aka server name
-
+    # skip-cert-verify: true
-# socks5
-- { name: "socks", type: socks5, server: server, port: 443 }
-# socks5 with authentication
-- { name: "socks", type: socks5, server: server, port: 443, username: "username", password: "password" }
-# with tls
-- { name: "socks", type: socks5, server: server, port: 443, tls: true }
-# with tls and skip-cert-verify
-- { name: "socks", type: socks5, server: server, port: 443, tls: true, skip-cert-verify: true }
-
-# http
-- { name: "http", type: http, server: server, port: 443 }
-# http with authentication
-- { name: "http", type: http, server: server, port: 443, username: "username", password: "password" }
-# with tls (https)
-- { name: "http", type: http, server: server, port: 443, tls: true }
-# with tls (https) and skip-cert-verify
-- { name: "http", type: http, server: server, port: 443, tls: true, skip-cert-verify: true }
-
-Proxy Group:
-# url-test select which proxy will be used by benchmarking speed to a URL.
-- { name: "auto", type: url-test, proxies: ["ss1", "ss2", "vmess1"], url: "http://www.gstatic.com/generate_204", interval: 300 }
-
-# fallback select an available policy by priority. The availability is tested by accessing an URL, just like an auto url-test group.
-- { name: "fallback-auto", type: fallback, proxies: ["ss1", "ss2", "vmess1"], url: "http://www.gstatic.com/generate_204", interval: 300 }
-
-# load-balance: The request of the same eTLD will be dial on the same proxy.
-- { name: "load-balance", type: load-balance, proxies: ["ss1", "ss2", "vmess1"], url: "http://www.gstatic.com/generate_204", interval: 300 }
-
-# select is used for selecting proxy or proxy group
-# you can use RESTful API to switch proxy, is recommended for use in GUI.
-- { name: "Proxy", type: select, proxies: ["ss1", "ss2", "vmess1", "auto"] }
-
-Rule:
-- DOMAIN-SUFFIX,google.com,auto
-- DOMAIN-KEYWORD,google,auto
-- DOMAIN,google.com,auto
-- DOMAIN-SUFFIX,ad.com,REJECT
-- IP-CIDR,127.0.0.0/8,DIRECT
-# rename SOURCE-IP-CIDR and would remove after prerelease
-- SRC-IP-CIDR,192.168.1.201/32,DIRECT
-- GEOIP,CN,DIRECT
-- DST-PORT,80,DIRECT
-- SRC-PORT,7777,DIRECT
-# FINAL would remove after prerelease
-# you also can use `FINAL,Proxy` or `FINAL,,Proxy` now
-- MATCH,auto
 ```
 
-## Documentations
+### IPTABLES configuration
-https://clash.gitbook.io/
+Work on Linux OS who's supported `iptables`
 
-## Thanks
+```yaml
+# Enable the TPROXY listener
+tproxy-port: 9898
 
-[riobard/go-shadowsocks2](https://github.com/riobard/go-shadowsocks2)
+iptables:
+  enable: true # default is false
+  inbound-interface: eth0 # detect the inbound interface, default is 'lo'
+```
+Run Clash as a daemon.
 
-[v2ray/v2ray-core](https://github.com/v2ray/v2ray-core)
+Create the systemd configuration file at /etc/systemd/system/clash.service:
+```shell
+[Unit]
+Description=Clash daemon, A rule-based proxy in Go.
+After=network.target
+
+[Service]
+Type=simple
+CapabilityBoundingSet=cap_net_admin
+Restart=always
+ExecStart=/usr/local/bin/clash -d /etc/clash
+
+[Install]
+WantedBy=multi-user.target
+```
+Launch clashd on system startup with:
+```shell
+$ systemctl enable clash
+```
+Launch clashd immediately with:
+```shell
+$ systemctl start clash
+```
+
+### Display Process name
+To display process name online by click [https://yaling888.github.io/yacd/](https://yaling888.github.io/yacd/).
+
+You can download the [Dashboard](https://github.com/yaling888/yacd/archive/gh-pages.zip) into Clash home directory:
+```shell
+cd ~/.config/clash
+curl -LJ https://github.com/yaling888/yacd/archive/gh-pages.zip -o dashboard.zip
+unzip dashboard.zip
+```
+
+Add to config file:
+```yaml
+external-controller: 127.0.0.1:9090
+external-ui: dashboard
+```
+Open [http://127.0.0.1:9090/ui/](http://127.0.0.1:9090/ui/) by web browser.
+
+## Plus Pro Release
+[Release](https://github.com/yaling888/clash/releases/tag/plus)
+
+## Development
+If you want to build an application that uses clash as a library, check out the the [GitHub Wiki](https://github.com/Dreamacro/clash/wiki/use-clash-as-a-library)
+
+## Credits
+
+* [riobard/go-shadowsocks2](https://github.com/riobard/go-shadowsocks2)
+* [v2ray/v2ray-core](https://github.com/v2ray/v2ray-core)
+* [WireGuard/wireguard-go](https://github.com/WireGuard/wireguard-go)
 
 ## License
 
+This software is released under the GPL-3.0 license.
+
 [![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2FDreamacro%2Fclash.svg?type=large)](https://app.fossa.io/projects/git%2Bgithub.com%2FDreamacro%2Fclash?ref=badge_large)
-
-## TODO
-
-- [x] Complementing the necessary rule operators
-- [x] Redir proxy
-- [x] UDP support
-- [ ] Connection manager

adapter/adapter.go

@@ -0,0 +1,197 @@
+package adapter
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net"
+	"net/http"
+	"net/netip"
+	"net/url"
+	"time"
+	_ "unsafe"
+
+	"github.com/Dreamacro/clash/common/queue"
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+
+	"go.uber.org/atomic"
+)
+
+//go:linkname errCanceled net.errCanceled
+var errCanceled error
+
+type Proxy struct {
+	C.ProxyAdapter
+	history *queue.Queue[C.DelayHistory]
+	alive   *atomic.Bool
+}
+
+// Alive implements C.Proxy
+func (p *Proxy) Alive() bool {
+	return p.alive.Load()
+}
+
+// Dial implements C.Proxy
+func (p *Proxy) Dial(metadata *C.Metadata) (C.Conn, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), C.DefaultTCPTimeout)
+	defer cancel()
+	return p.DialContext(ctx, metadata)
+}
+
+// DialContext implements C.ProxyAdapter
+func (p *Proxy) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
+	conn, err := p.ProxyAdapter.DialContext(ctx, metadata, opts...)
+	p.alive.Store(err == nil || errors.Is(err, errCanceled))
+	return conn, err
+}
+
+// DialUDP implements C.ProxyAdapter
+func (p *Proxy) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), C.DefaultUDPTimeout)
+	defer cancel()
+	return p.ListenPacketContext(ctx, metadata)
+}
+
+// ListenPacketContext implements C.ProxyAdapter
+func (p *Proxy) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
+	pc, err := p.ProxyAdapter.ListenPacketContext(ctx, metadata, opts...)
+	p.alive.Store(err == nil)
+	return pc, err
+}
+
+// DelayHistory implements C.Proxy
+func (p *Proxy) DelayHistory() []C.DelayHistory {
+	queueM := p.history.Copy()
+	histories := []C.DelayHistory{}
+	for _, item := range queueM {
+		histories = append(histories, item)
+	}
+	return histories
+}
+
+// LastDelay return last history record. if proxy is not alive, return the max value of uint16.
+// implements C.Proxy
+func (p *Proxy) LastDelay() (delay uint16) {
+	var max uint16 = 0xffff
+	if !p.alive.Load() {
+		return max
+	}
+
+	history := p.history.Last()
+	if history.Delay == 0 {
+		return max
+	}
+	return history.Delay
+}
+
+// MarshalJSON implements C.ProxyAdapter
+func (p *Proxy) MarshalJSON() ([]byte, error) {
+	inner, err := p.ProxyAdapter.MarshalJSON()
+	if err != nil {
+		return inner, err
+	}
+
+	mapping := map[string]any{}
+	_ = json.Unmarshal(inner, &mapping)
+	mapping["history"] = p.DelayHistory()
+	mapping["name"] = p.Name()
+	mapping["udp"] = p.SupportUDP()
+	return json.Marshal(mapping)
+}
+
+// URLTest get the delay for the specified URL
+// implements C.Proxy
+func (p *Proxy) URLTest(ctx context.Context, url string) (t uint16, err error) {
+	defer func() {
+		p.alive.Store(err == nil)
+		record := C.DelayHistory{Time: time.Now()}
+		if err == nil {
+			record.Delay = t
+		}
+		p.history.Put(record)
+		if p.history.Len() > 10 {
+			p.history.Pop()
+		}
+	}()
+
+	addr, err := urlToMetadata(url)
+	if err != nil {
+		return
+	}
+
+	start := time.Now()
+	instance, err := p.DialContext(ctx, &addr)
+	if err != nil {
+		return
+	}
+	defer func() {
+		_ = instance.Close()
+	}()
+
+	req, err := http.NewRequest(http.MethodHead, url, nil)
+	if err != nil {
+		return
+	}
+	req = req.WithContext(ctx)
+
+	transport := &http.Transport{
+		DialContext: func(context.Context, string, string) (net.Conn, error) {
+			return instance, nil
+		},
+		// from http.DefaultTransport
+		MaxIdleConns:          100,
+		IdleConnTimeout:       90 * time.Second,
+		TLSHandshakeTimeout:   10 * time.Second,
+		ExpectContinueTimeout: 1 * time.Second,
+	}
+
+	client := http.Client{
+		Transport: transport,
+		CheckRedirect: func(req *http.Request, via []*http.Request) error {
+			return http.ErrUseLastResponse
+		},
+	}
+	defer client.CloseIdleConnections()
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return
+	}
+	_ = resp.Body.Close()
+	t = uint16(time.Since(start) / time.Millisecond)
+	return
+}
+
+func NewProxy(adapter C.ProxyAdapter) *Proxy {
+	return &Proxy{adapter, queue.New[C.DelayHistory](10), atomic.NewBool(true)}
+}
+
+func urlToMetadata(rawURL string) (addr C.Metadata, err error) {
+	u, err := url.Parse(rawURL)
+	if err != nil {
+		return
+	}
+
+	port := u.Port()
+	if port == "" {
+		switch u.Scheme {
+		case "https":
+			port = "443"
+		case "http":
+			port = "80"
+		default:
+			err = fmt.Errorf("%s scheme not Support", rawURL)
+			return
+		}
+	}
+
+	addr = C.Metadata{
+		AddrType: C.AtypDomainName,
+		Host:     u.Hostname(),
+		DstIP:    netip.Addr{},
+		DstPort:  port,
+	}
+	return
+}

adapter/inbound/http.go

@@ -0,0 +1,21 @@
+package inbound
+
+import (
+	"net"
+
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/context"
+	"github.com/Dreamacro/clash/transport/socks5"
+)
+
+// NewHTTP receive normal http request and return HTTPContext
+func NewHTTP(target socks5.Addr, source net.Addr, conn net.Conn) *context.ConnContext {
+	metadata := parseSocksAddr(target)
+	metadata.NetWork = C.TCP
+	metadata.Type = C.HTTP
+	if ip, port, err := parseAddr(source.String()); err == nil {
+		metadata.SrcIP = ip
+		metadata.SrcPort = port
+	}
+	return context.NewConnContext(conn, metadata)
+}

adapter/inbound/https.go

@@ -0,0 +1,20 @@
+package inbound
+
+import (
+	"net"
+	"net/http"
+
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/context"
+)
+
+// NewHTTPS receive CONNECT request and return ConnContext
+func NewHTTPS(request *http.Request, conn net.Conn) *context.ConnContext {
+	metadata := parseHTTPAddr(request)
+	metadata.Type = C.HTTPCONNECT
+	if ip, port, err := parseAddr(conn.RemoteAddr().String()); err == nil {
+		metadata.SrcIP = ip
+		metadata.SrcPort = port
+	}
+	return context.NewConnContext(conn, metadata)
+}

adapter/inbound/mitm.go

@@ -0,0 +1,22 @@
+package inbound
+
+import (
+	"net"
+
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/context"
+	"github.com/Dreamacro/clash/transport/socks5"
+)
+
+// NewMitm receive mitm request and return MitmContext
+func NewMitm(target socks5.Addr, source net.Addr, userAgent string, conn net.Conn) *context.ConnContext {
+	metadata := parseSocksAddr(target)
+	metadata.NetWork = C.TCP
+	metadata.Type = C.MITM
+	metadata.UserAgent = userAgent
+	if ip, port, err := parseAddr(source.String()); err == nil {
+		metadata.SrcIP = ip
+		metadata.SrcPort = port
+	}
+	return context.NewConnContext(conn, metadata)
+}

adapter/inbound/packet.go

@@ -0,0 +1,33 @@
+package inbound
+
+import (
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/transport/socks5"
+)
+
+// PacketAdapter is a UDP Packet adapter for socks/redir/tun
+type PacketAdapter struct {
+	C.UDPPacket
+	metadata *C.Metadata
+}
+
+// Metadata returns destination metadata
+func (s *PacketAdapter) Metadata() *C.Metadata {
+	return s.metadata
+}
+
+// NewPacket is PacketAdapter generator
+func NewPacket(target socks5.Addr, packet C.UDPPacket, source C.Type) *PacketAdapter {
+	metadata := parseSocksAddr(target)
+	metadata.NetWork = C.UDP
+	metadata.Type = source
+	if ip, port, err := parseAddr(packet.LocalAddr().String()); err == nil {
+		metadata.SrcIP = ip
+		metadata.SrcPort = port
+	}
+
+	return &PacketAdapter{
+		UDPPacket: packet,
+		metadata:  metadata,
+	}
+}

adapter/inbound/socket.go

@@ -0,0 +1,22 @@
+package inbound
+
+import (
+	"net"
+
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/context"
+	"github.com/Dreamacro/clash/transport/socks5"
+)
+
+// NewSocket receive TCP inbound and return ConnContext
+func NewSocket(target socks5.Addr, conn net.Conn, source C.Type) *context.ConnContext {
+	metadata := parseSocksAddr(target)
+	metadata.NetWork = C.TCP
+	metadata.Type = source
+	if ip, port, err := parseAddr(conn.RemoteAddr().String()); err == nil {
+		metadata.SrcIP = ip
+		metadata.SrcPort = port
+	}
+
+	return context.NewConnContext(conn, metadata)
+}

adapter/inbound/util.go

@@ -1,12 +1,15 @@
-package adapters
+package inbound
 
 import (
 	"net"
 	"net/http"
+	"net/netip"
 	"strconv"
+	"strings"
 
-	"github.com/Dreamacro/clash/component/socks5"
+	"github.com/Dreamacro/clash/common/nnip"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/transport/socks5"
 )
 
 func parseSocksAddr(target socks5.Addr) *C.Metadata {
@@ -16,15 +19,14 @@ func parseSocksAddr(target socks5.Addr) *C.Metadata {
 
 	switch target[0] {
 	case socks5.AtypDomainName:
-		metadata.Host = string(target[2 : 2+target[1]])
+		// trim for FQDN
+		metadata.Host = strings.TrimRight(string(target[2:2+target[1]]), ".")
 		metadata.DstPort = strconv.Itoa((int(target[2+target[1]]) << 8) | int(target[2+target[1]+1]))
 	case socks5.AtypIPv4:
-		ip := net.IP(target[1 : 1+net.IPv4len])
+		metadata.DstIP = nnip.IpToAddr(net.IP(target[1 : 1+net.IPv4len]))
-		metadata.DstIP = &ip
 		metadata.DstPort = strconv.Itoa((int(target[1+net.IPv4len]) << 8) | int(target[1+net.IPv4len+1]))
 	case socks5.AtypIPv6:
-		ip := net.IP(target[1 : 1+net.IPv6len])
+		metadata.DstIP = nnip.IpToAddr(net.IP(target[1 : 1+net.IPv6len]))
-		metadata.DstIP = &ip
 		metadata.DstPort = strconv.Itoa((int(target[1+net.IPv6len]) << 8) | int(target[1+net.IPv6len+1]))
 	}
 
@@ -38,35 +40,37 @@ func parseHTTPAddr(request *http.Request) *C.Metadata {
 		port = "80"
 	}
 
+	// trim FQDN (#737)
+	host = strings.TrimRight(host, ".")
+
 	metadata := &C.Metadata{
 		NetWork:  C.TCP,
-		Type:     C.HTTP,
 		AddrType: C.AtypDomainName,
 		Host:     host,
-		DstIP:    nil,
+		DstIP:    netip.Addr{},
 		DstPort:  port,
 	}
 
-	ip := net.ParseIP(host)
+	ip, err := netip.ParseAddr(host)
-	if ip != nil {
+	if err == nil {
 		switch {
-		case ip.To4() == nil:
+		case ip.Is6():
 			metadata.AddrType = C.AtypIPv6
 		default:
 			metadata.AddrType = C.AtypIPv4
 		}
-		metadata.DstIP = &ip
+		metadata.DstIP = ip
 	}
 
 	return metadata
 }
 
-func parseAddr(addr string) (*net.IP, string, error) {
+func parseAddr(addr string) (netip.Addr, string, error) {
 	host, port, err := net.SplitHostPort(addr)
 	if err != nil {
-		return nil, "", err
+		return netip.Addr{}, "", err
 	}
 
-	ip := net.ParseIP(host)
+	ip, err := netip.ParseAddr(host)
-	return &ip, port, nil
+	return ip, port, err
 }

adapter/outbound/base.go

@@ -0,0 +1,138 @@
+package outbound
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"net"
+
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+)
+
+type Base struct {
+	name  string
+	addr  string
+	iface string
+	tp    C.AdapterType
+	udp   bool
+	rmark int
+}
+
+// Name implements C.ProxyAdapter
+func (b *Base) Name() string {
+	return b.name
+}
+
+// Type implements C.ProxyAdapter
+func (b *Base) Type() C.AdapterType {
+	return b.tp
+}
+
+// StreamConn implements C.ProxyAdapter
+func (b *Base) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+	return c, errors.New("no support")
+}
+
+// ListenPacketContext implements C.ProxyAdapter
+func (b *Base) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
+	return nil, errors.New("no support")
+}
+
+// SupportUDP implements C.ProxyAdapter
+func (b *Base) SupportUDP() bool {
+	return b.udp
+}
+
+// MarshalJSON implements C.ProxyAdapter
+func (b *Base) MarshalJSON() ([]byte, error) {
+	return json.Marshal(map[string]string{
+		"type": b.Type().String(),
+	})
+}
+
+// Addr implements C.ProxyAdapter
+func (b *Base) Addr() string {
+	return b.addr
+}
+
+// Unwrap implements C.ProxyAdapter
+func (b *Base) Unwrap(metadata *C.Metadata) C.Proxy {
+	return nil
+}
+
+// DialOptions return []dialer.Option from struct
+func (b *Base) DialOptions(opts ...dialer.Option) []dialer.Option {
+	if b.iface != "" {
+		opts = append(opts, dialer.WithInterface(b.iface))
+	}
+
+	if b.rmark != 0 {
+		opts = append(opts, dialer.WithRoutingMark(b.rmark))
+	}
+
+	return opts
+}
+
+type BasicOption struct {
+	Interface   string `proxy:"interface-name,omitempty" group:"interface-name,omitempty"`
+	RoutingMark int    `proxy:"routing-mark,omitempty" group:"routing-mark,omitempty"`
+}
+
+type BaseOption struct {
+	Name        string
+	Addr        string
+	Type        C.AdapterType
+	UDP         bool
+	Interface   string
+	RoutingMark int
+}
+
+func NewBase(opt BaseOption) *Base {
+	return &Base{
+		name:  opt.Name,
+		addr:  opt.Addr,
+		tp:    opt.Type,
+		udp:   opt.UDP,
+		iface: opt.Interface,
+		rmark: opt.RoutingMark,
+	}
+}
+
+type conn struct {
+	net.Conn
+	chain C.Chain
+}
+
+// Chains implements C.Connection
+func (c *conn) Chains() C.Chain {
+	return c.chain
+}
+
+// AppendToChains implements C.Connection
+func (c *conn) AppendToChains(a C.ProxyAdapter) {
+	c.chain = append(c.chain, a.Name())
+}
+
+func NewConn(c net.Conn, a C.ProxyAdapter) C.Conn {
+	return &conn{c, []string{a.Name()}}
+}
+
+type packetConn struct {
+	net.PacketConn
+	chain C.Chain
+}
+
+// Chains implements C.Connection
+func (c *packetConn) Chains() C.Chain {
+	return c.chain
+}
+
+// AppendToChains implements C.Connection
+func (c *packetConn) AppendToChains(a C.ProxyAdapter) {
+	c.chain = append(c.chain, a.Name())
+}
+
+func newPacketConn(pc net.PacketConn, a C.ProxyAdapter) C.PacketConn {
+	return &packetConn{pc, []string{a.Name()}}
+}

adapter/outbound/direct.go

@@ -0,0 +1,48 @@
+package outbound
+
+import (
+	"context"
+	"net"
+
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+)
+
+type Direct struct {
+	*Base
+}
+
+// DialContext implements C.ProxyAdapter
+func (d *Direct) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
+	opts = append(opts, dialer.WithDirect())
+	c, err := dialer.DialContext(ctx, "tcp", metadata.RemoteAddress(), d.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, err
+	}
+	tcpKeepAlive(c)
+	return NewConn(c, d), nil
+}
+
+// ListenPacketContext implements C.ProxyAdapter
+func (d *Direct) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
+	opts = append(opts, dialer.WithDirect())
+	pc, err := dialer.ListenPacket(ctx, "udp", "", d.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, err
+	}
+	return newPacketConn(&directPacketConn{pc}, d), nil
+}
+
+type directPacketConn struct {
+	net.PacketConn
+}
+
+func NewDirect() *Direct {
+	return &Direct{
+		Base: &Base{
+			name: "DIRECT",
+			tp:   C.Direct,
+			udp:  true,
+		},
+	}
+}

adapter/outbound/http.go

@@ -0,0 +1,149 @@
+package outbound
+
+import (
+	"bufio"
+	"context"
+	"crypto/tls"
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"net/url"
+	"strconv"
+
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+)
+
+type Http struct {
+	*Base
+	user      string
+	pass      string
+	tlsConfig *tls.Config
+}
+
+type HttpOption struct {
+	BasicOption
+	Name           string `proxy:"name"`
+	Server         string `proxy:"server"`
+	Port           int    `proxy:"port"`
+	UserName       string `proxy:"username,omitempty"`
+	Password       string `proxy:"password,omitempty"`
+	TLS            bool   `proxy:"tls,omitempty"`
+	SNI            string `proxy:"sni,omitempty"`
+	SkipCertVerify bool   `proxy:"skip-cert-verify,omitempty"`
+}
+
+// StreamConn implements C.ProxyAdapter
+func (h *Http) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+	if h.tlsConfig != nil {
+		cc := tls.Client(c, h.tlsConfig)
+		err := cc.Handshake()
+		c = cc
+		if err != nil {
+			return nil, fmt.Errorf("%s connect error: %w", h.addr, err)
+		}
+	}
+
+	if err := h.shakeHand(metadata, c); err != nil {
+		return nil, err
+	}
+	return c, nil
+}
+
+// DialContext implements C.ProxyAdapter
+func (h *Http) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
+	c, err := dialer.DialContext(ctx, "tcp", h.addr, h.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %w", h.addr, err)
+	}
+	tcpKeepAlive(c)
+
+	defer safeConnClose(c, err)
+
+	c, err = h.StreamConn(c, metadata)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewConn(c, h), nil
+}
+
+func (h *Http) shakeHand(metadata *C.Metadata, rw io.ReadWriter) error {
+	addr := metadata.RemoteAddress()
+	req := &http.Request{
+		Method: http.MethodConnect,
+		URL: &url.URL{
+			Host: addr,
+		},
+		Host: addr,
+		Header: http.Header{
+			"Proxy-Connection": []string{"Keep-Alive"},
+		},
+	}
+
+	if h.user != "" && h.pass != "" {
+		auth := h.user + ":" + h.pass
+		req.Header.Add("Proxy-Authorization", "Basic "+base64.StdEncoding.EncodeToString([]byte(auth)))
+	}
+
+	if metadata.Type == C.MITM {
+		req.Header.Set("Origin-Request-Source-Address", metadata.SourceAddress())
+	}
+
+	if err := req.Write(rw); err != nil {
+		return err
+	}
+
+	resp, err := http.ReadResponse(bufio.NewReader(rw), req)
+	if err != nil {
+		return err
+	}
+
+	if resp.StatusCode == http.StatusOK {
+		return nil
+	}
+
+	if resp.StatusCode == http.StatusProxyAuthRequired {
+		return errors.New("HTTP need auth")
+	}
+
+	if resp.StatusCode == http.StatusMethodNotAllowed {
+		return errors.New("CONNECT method not allowed by proxy")
+	}
+
+	if resp.StatusCode >= http.StatusInternalServerError {
+		return errors.New(resp.Status)
+	}
+
+	return fmt.Errorf("can not connect remote err code: %d", resp.StatusCode)
+}
+
+func NewHttp(option HttpOption) *Http {
+	var tlsConfig *tls.Config
+	if option.TLS {
+		sni := option.Server
+		if option.SNI != "" {
+			sni = option.SNI
+		}
+		tlsConfig = &tls.Config{
+			InsecureSkipVerify: option.SkipCertVerify,
+			ServerName:         sni,
+		}
+	}
+
+	return &Http{
+		Base: &Base{
+			name:  option.Name,
+			addr:  net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
+			tp:    C.Http,
+			iface: option.Interface,
+			rmark: option.RoutingMark,
+		},
+		user:      option.UserName,
+		pass:      option.Password,
+		tlsConfig: tlsConfig,
+	}
+}

adapter/outbound/mitm.go

@@ -0,0 +1,49 @@
+package outbound
+
+import (
+	"context"
+	"net"
+	"time"
+
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+)
+
+type Mitm struct {
+	*Base
+	serverAddr      *net.TCPAddr
+	httpProxyClient *Http
+}
+
+// DialContext implements C.ProxyAdapter
+func (m *Mitm) DialContext(_ context.Context, metadata *C.Metadata, _ ...dialer.Option) (C.Conn, error) {
+	c, err := net.DialTCP("tcp", nil, m.serverAddr)
+	if err != nil {
+		return nil, err
+	}
+
+	_ = c.SetKeepAlive(true)
+	_ = c.SetKeepAlivePeriod(60 * time.Second)
+
+	metadata.Type = C.MITM
+
+	hc, err := m.httpProxyClient.StreamConn(c, metadata)
+	if err != nil {
+		_ = c.Close()
+		return nil, err
+	}
+
+	return NewConn(hc, m), nil
+}
+
+func NewMitm(serverAddr string) *Mitm {
+	tcpAddr, _ := net.ResolveTCPAddr("tcp", serverAddr)
+	return &Mitm{
+		Base: &Base{
+			name: "Mitm",
+			tp:   C.Mitm,
+		},
+		serverAddr:      tcpAddr,
+		httpProxyClient: NewHttp(HttpOption{}),
+	}
+}

adapter/outbound/reject.go

@@ -0,0 +1,89 @@
+package outbound
+
+import (
+	"context"
+	"io"
+	"net"
+	"time"
+
+	"github.com/Dreamacro/clash/common/cache"
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+)
+
+const (
+	rejectCountLimit = 50
+	rejectDelay      = time.Second * 35
+)
+
+var rejectCounter = cache.NewLRUCache[string, int](cache.WithAge[string, int](15), cache.WithStale[string, int](false), cache.WithSize[string, int](512))
+
+type Reject struct {
+	*Base
+}
+
+// DialContext implements C.ProxyAdapter
+func (r *Reject) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
+	key := metadata.RemoteAddress()
+
+	count, existed := rejectCounter.Get(key)
+	if !existed {
+		count = 0
+	}
+
+	count = count + 1
+
+	rejectCounter.Set(key, count)
+
+	if count > rejectCountLimit {
+		c, _ := net.Pipe()
+
+		_ = c.SetDeadline(time.Now().Add(rejectDelay))
+
+		return NewConn(c, r), nil
+	}
+
+	return NewConn(&nopConn{}, r), nil
+}
+
+// ListenPacketContext implements C.ProxyAdapter
+func (r *Reject) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
+	return newPacketConn(&nopPacketConn{}, r), nil
+}
+
+func NewReject() *Reject {
+	return &Reject{
+		Base: &Base{
+			name: "REJECT",
+			tp:   C.Reject,
+			udp:  true,
+		},
+	}
+}
+
+type nopConn struct{}
+
+func (rw *nopConn) Read(b []byte) (int, error) {
+	return 0, io.EOF
+}
+
+func (rw *nopConn) Write(b []byte) (int, error) {
+	return 0, io.EOF
+}
+
+func (rw *nopConn) Close() error                     { return nil }
+func (rw *nopConn) LocalAddr() net.Addr              { return nil }
+func (rw *nopConn) RemoteAddr() net.Addr             { return nil }
+func (rw *nopConn) SetDeadline(time.Time) error      { return nil }
+func (rw *nopConn) SetReadDeadline(time.Time) error  { return nil }
+func (rw *nopConn) SetWriteDeadline(time.Time) error { return nil }
+
+type nopPacketConn struct{}
+
+func (npc *nopPacketConn) WriteTo(b []byte, addr net.Addr) (n int, err error) { return len(b), nil }
+func (npc *nopPacketConn) ReadFrom(b []byte) (int, net.Addr, error)           { return 0, nil, io.EOF }
+func (npc *nopPacketConn) Close() error                                       { return nil }
+func (npc *nopPacketConn) LocalAddr() net.Addr                                { return &net.UDPAddr{IP: net.IPv4zero, Port: 0} }
+func (npc *nopPacketConn) SetDeadline(time.Time) error                        { return nil }
+func (npc *nopPacketConn) SetReadDeadline(time.Time) error                    { return nil }
+func (npc *nopPacketConn) SetWriteDeadline(time.Time) error                   { return nil }

adapter/outbound/shadowsocks.go

@@ -0,0 +1,204 @@
+package outbound
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net"
+	"strconv"
+
+	"github.com/Dreamacro/clash/common/structure"
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+	obfs "github.com/Dreamacro/clash/transport/simple-obfs"
+	"github.com/Dreamacro/clash/transport/socks5"
+	v2rayObfs "github.com/Dreamacro/clash/transport/v2ray-plugin"
+
+	"github.com/Dreamacro/go-shadowsocks2/core"
+)
+
+type ShadowSocks struct {
+	*Base
+	cipher core.Cipher
+
+	// obfs
+	obfsMode    string
+	obfsOption  *simpleObfsOption
+	v2rayOption *v2rayObfs.Option
+}
+
+type ShadowSocksOption struct {
+	BasicOption
+	Name       string         `proxy:"name"`
+	Server     string         `proxy:"server"`
+	Port       int            `proxy:"port"`
+	Password   string         `proxy:"password"`
+	Cipher     string         `proxy:"cipher"`
+	UDP        bool           `proxy:"udp,omitempty"`
+	Plugin     string         `proxy:"plugin,omitempty"`
+	PluginOpts map[string]any `proxy:"plugin-opts,omitempty"`
+}
+
+type simpleObfsOption struct {
+	Mode string `obfs:"mode,omitempty"`
+	Host string `obfs:"host,omitempty"`
+}
+
+type v2rayObfsOption struct {
+	Mode           string            `obfs:"mode"`
+	Host           string            `obfs:"host,omitempty"`
+	Path           string            `obfs:"path,omitempty"`
+	TLS            bool              `obfs:"tls,omitempty"`
+	Headers        map[string]string `obfs:"headers,omitempty"`
+	SkipCertVerify bool              `obfs:"skip-cert-verify,omitempty"`
+	Mux            bool              `obfs:"mux,omitempty"`
+}
+
+// StreamConn implements C.ProxyAdapter
+func (ss *ShadowSocks) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+	switch ss.obfsMode {
+	case "tls":
+		c = obfs.NewTLSObfs(c, ss.obfsOption.Host)
+	case "http":
+		_, port, _ := net.SplitHostPort(ss.addr)
+		c = obfs.NewHTTPObfs(c, ss.obfsOption.Host, port)
+	case "websocket":
+		var err error
+		c, err = v2rayObfs.NewV2rayObfs(c, ss.v2rayOption)
+		if err != nil {
+			return nil, fmt.Errorf("%s connect error: %w", ss.addr, err)
+		}
+	}
+	c = ss.cipher.StreamConn(c)
+	_, err := c.Write(serializesSocksAddr(metadata))
+	return c, err
+}
+
+// DialContext implements C.ProxyAdapter
+func (ss *ShadowSocks) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
+	c, err := dialer.DialContext(ctx, "tcp", ss.addr, ss.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %w", ss.addr, err)
+	}
+	tcpKeepAlive(c)
+
+	defer safeConnClose(c, err)
+
+	c, err = ss.StreamConn(c, metadata)
+	return NewConn(c, ss), err
+}
+
+// ListenPacketContext implements C.ProxyAdapter
+func (ss *ShadowSocks) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
+	pc, err := dialer.ListenPacket(ctx, "udp", "", ss.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, err
+	}
+
+	addr, err := resolveUDPAddr("udp", ss.addr)
+	if err != nil {
+		pc.Close()
+		return nil, err
+	}
+
+	pc = ss.cipher.PacketConn(pc)
+	return newPacketConn(&ssPacketConn{PacketConn: pc, rAddr: addr}, ss), nil
+}
+
+func NewShadowSocks(option ShadowSocksOption) (*ShadowSocks, error) {
+	addr := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
+	cipher := option.Cipher
+	password := option.Password
+	ciph, err := core.PickCipher(cipher, nil, password)
+	if err != nil {
+		return nil, fmt.Errorf("ss %s initialize error: %w", addr, err)
+	}
+
+	var v2rayOption *v2rayObfs.Option
+	var obfsOption *simpleObfsOption
+	obfsMode := ""
+
+	decoder := structure.NewDecoder(structure.Option{TagName: "obfs", WeaklyTypedInput: true})
+	if option.Plugin == "obfs" {
+		opts := simpleObfsOption{Host: "bing.com"}
+		if err := decoder.Decode(option.PluginOpts, &opts); err != nil {
+			return nil, fmt.Errorf("ss %s initialize obfs error: %w", addr, err)
+		}
+
+		if opts.Mode != "tls" && opts.Mode != "http" {
+			return nil, fmt.Errorf("ss %s obfs mode error: %s", addr, opts.Mode)
+		}
+		obfsMode = opts.Mode
+		obfsOption = &opts
+	} else if option.Plugin == "v2ray-plugin" {
+		opts := v2rayObfsOption{Host: "bing.com", Mux: true}
+		if err := decoder.Decode(option.PluginOpts, &opts); err != nil {
+			return nil, fmt.Errorf("ss %s initialize v2ray-plugin error: %w", addr, err)
+		}
+
+		if opts.Mode != "websocket" {
+			return nil, fmt.Errorf("ss %s obfs mode error: %s", addr, opts.Mode)
+		}
+		obfsMode = opts.Mode
+		v2rayOption = &v2rayObfs.Option{
+			Host:    opts.Host,
+			Path:    opts.Path,
+			Headers: opts.Headers,
+			Mux:     opts.Mux,
+		}
+
+		if opts.TLS {
+			v2rayOption.TLS = true
+			v2rayOption.SkipCertVerify = opts.SkipCertVerify
+		}
+	}
+
+	return &ShadowSocks{
+		Base: &Base{
+			name:  option.Name,
+			addr:  addr,
+			tp:    C.Shadowsocks,
+			udp:   option.UDP,
+			iface: option.Interface,
+			rmark: option.RoutingMark,
+		},
+		cipher: ciph,
+
+		obfsMode:    obfsMode,
+		v2rayOption: v2rayOption,
+		obfsOption:  obfsOption,
+	}, nil
+}
+
+type ssPacketConn struct {
+	net.PacketConn
+	rAddr net.Addr
+}
+
+func (spc *ssPacketConn) WriteTo(b []byte, addr net.Addr) (n int, err error) {
+	packet, err := socks5.EncodeUDPPacket(socks5.ParseAddrToSocksAddr(addr), b)
+	if err != nil {
+		return
+	}
+	return spc.PacketConn.WriteTo(packet[3:], spc.rAddr)
+}
+
+func (spc *ssPacketConn) ReadFrom(b []byte) (int, net.Addr, error) {
+	n, _, e := spc.PacketConn.ReadFrom(b)
+	if e != nil {
+		return 0, nil, e
+	}
+
+	addr := socks5.SplitAddr(b[:n])
+	if addr == nil {
+		return 0, nil, errors.New("parse addr error")
+	}
+
+	udpAddr := addr.UDPAddr()
+	if udpAddr == nil {
+		return 0, nil, errors.New("parse addr error")
+	}
+
+	copy(b, b[len(addr):])
+	return n - len(addr), udpAddr, e
+}

adapter/outbound/shadowsocksr.go

@@ -0,0 +1,158 @@
+package outbound
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"strconv"
+
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/transport/ssr/obfs"
+	"github.com/Dreamacro/clash/transport/ssr/protocol"
+
+	"github.com/Dreamacro/go-shadowsocks2/core"
+	"github.com/Dreamacro/go-shadowsocks2/shadowaead"
+	"github.com/Dreamacro/go-shadowsocks2/shadowstream"
+)
+
+type ShadowSocksR struct {
+	*Base
+	cipher   core.Cipher
+	obfs     obfs.Obfs
+	protocol protocol.Protocol
+}
+
+type ShadowSocksROption struct {
+	BasicOption
+	Name          string `proxy:"name"`
+	Server        string `proxy:"server"`
+	Port          int    `proxy:"port"`
+	Password      string `proxy:"password"`
+	Cipher        string `proxy:"cipher"`
+	Obfs          string `proxy:"obfs"`
+	ObfsParam     string `proxy:"obfs-param,omitempty"`
+	Protocol      string `proxy:"protocol"`
+	ProtocolParam string `proxy:"protocol-param,omitempty"`
+	UDP           bool   `proxy:"udp,omitempty"`
+}
+
+// StreamConn implements C.ProxyAdapter
+func (ssr *ShadowSocksR) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+	c = ssr.obfs.StreamConn(c)
+	c = ssr.cipher.StreamConn(c)
+	var (
+		iv  []byte
+		err error
+	)
+	switch conn := c.(type) {
+	case *shadowstream.Conn:
+		iv, err = conn.ObtainWriteIV()
+		if err != nil {
+			return nil, err
+		}
+	case *shadowaead.Conn:
+		return nil, fmt.Errorf("invalid connection type")
+	}
+	c = ssr.protocol.StreamConn(c, iv)
+	_, err = c.Write(serializesSocksAddr(metadata))
+	return c, err
+}
+
+// DialContext implements C.ProxyAdapter
+func (ssr *ShadowSocksR) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
+	c, err := dialer.DialContext(ctx, "tcp", ssr.addr, ssr.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %w", ssr.addr, err)
+	}
+	tcpKeepAlive(c)
+
+	defer safeConnClose(c, err)
+
+	c, err = ssr.StreamConn(c, metadata)
+	return NewConn(c, ssr), err
+}
+
+// ListenPacketContext implements C.ProxyAdapter
+func (ssr *ShadowSocksR) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
+	pc, err := dialer.ListenPacket(ctx, "udp", "", ssr.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, err
+	}
+
+	addr, err := resolveUDPAddr("udp", ssr.addr)
+	if err != nil {
+		pc.Close()
+		return nil, err
+	}
+
+	pc = ssr.cipher.PacketConn(pc)
+	pc = ssr.protocol.PacketConn(pc)
+	return newPacketConn(&ssPacketConn{PacketConn: pc, rAddr: addr}, ssr), nil
+}
+
+func NewShadowSocksR(option ShadowSocksROption) (*ShadowSocksR, error) {
+	// SSR protocol compatibility
+	// https://github.com/Dreamacro/clash/pull/2056
+	if option.Cipher == "none" {
+		option.Cipher = "dummy"
+	}
+
+	addr := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
+	cipher := option.Cipher
+	password := option.Password
+	coreCiph, err := core.PickCipher(cipher, nil, password)
+	if err != nil {
+		return nil, fmt.Errorf("ssr %s initialize error: %w", addr, err)
+	}
+	var (
+		ivSize int
+		key    []byte
+	)
+
+	if option.Cipher == "dummy" {
+		ivSize = 0
+		key = core.Kdf(option.Password, 16)
+	} else {
+		ciph, ok := coreCiph.(*core.StreamCipher)
+		if !ok {
+			return nil, fmt.Errorf("%s is not none or a supported stream cipher in ssr", cipher)
+		}
+		ivSize = ciph.IVSize()
+		key = ciph.Key
+	}
+
+	obfs, obfsOverhead, err := obfs.PickObfs(option.Obfs, &obfs.Base{
+		Host:   option.Server,
+		Port:   option.Port,
+		Key:    key,
+		IVSize: ivSize,
+		Param:  option.ObfsParam,
+	})
+	if err != nil {
+		return nil, fmt.Errorf("ssr %s initialize obfs error: %w", addr, err)
+	}
+
+	protocol, err := protocol.PickProtocol(option.Protocol, &protocol.Base{
+		Key:      key,
+		Overhead: obfsOverhead,
+		Param:    option.ProtocolParam,
+	})
+	if err != nil {
+		return nil, fmt.Errorf("ssr %s initialize protocol error: %w", addr, err)
+	}
+
+	return &ShadowSocksR{
+		Base: &Base{
+			name:  option.Name,
+			addr:  addr,
+			tp:    C.ShadowsocksR,
+			udp:   option.UDP,
+			iface: option.Interface,
+			rmark: option.RoutingMark,
+		},
+		cipher:   coreCiph,
+		obfs:     obfs,
+		protocol: protocol,
+	}, nil
+}

adapter/outbound/snell.go

@@ -0,0 +1,164 @@
+package outbound
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"strconv"
+
+	"github.com/Dreamacro/clash/common/structure"
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+	obfs "github.com/Dreamacro/clash/transport/simple-obfs"
+	"github.com/Dreamacro/clash/transport/snell"
+)
+
+type Snell struct {
+	*Base
+	psk        []byte
+	pool       *snell.Pool
+	obfsOption *simpleObfsOption
+	version    int
+}
+
+type SnellOption struct {
+	BasicOption
+	Name     string         `proxy:"name"`
+	Server   string         `proxy:"server"`
+	Port     int            `proxy:"port"`
+	Psk      string         `proxy:"psk"`
+	UDP      bool           `proxy:"udp,omitempty"`
+	Version  int            `proxy:"version,omitempty"`
+	ObfsOpts map[string]any `proxy:"obfs-opts,omitempty"`
+}
+
+type streamOption struct {
+	psk        []byte
+	version    int
+	addr       string
+	obfsOption *simpleObfsOption
+}
+
+func streamConn(c net.Conn, option streamOption) *snell.Snell {
+	switch option.obfsOption.Mode {
+	case "tls":
+		c = obfs.NewTLSObfs(c, option.obfsOption.Host)
+	case "http":
+		_, port, _ := net.SplitHostPort(option.addr)
+		c = obfs.NewHTTPObfs(c, option.obfsOption.Host, port)
+	}
+	return snell.StreamConn(c, option.psk, option.version)
+}
+
+// StreamConn implements C.ProxyAdapter
+func (s *Snell) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+	c = streamConn(c, streamOption{s.psk, s.version, s.addr, s.obfsOption})
+	port, _ := strconv.ParseUint(metadata.DstPort, 10, 16)
+	err := snell.WriteHeader(c, metadata.String(), uint(port), s.version)
+	return c, err
+}
+
+// DialContext implements C.ProxyAdapter
+func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
+	if s.version == snell.Version2 && len(opts) == 0 {
+		c, err := s.pool.Get()
+		if err != nil {
+			return nil, err
+		}
+
+		port, _ := strconv.ParseUint(metadata.DstPort, 10, 16)
+		if err = snell.WriteHeader(c, metadata.String(), uint(port), s.version); err != nil {
+			c.Close()
+			return nil, err
+		}
+		return NewConn(c, s), err
+	}
+
+	c, err := dialer.DialContext(ctx, "tcp", s.addr, s.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %w", s.addr, err)
+	}
+	tcpKeepAlive(c)
+
+	defer safeConnClose(c, err)
+
+	c, err = s.StreamConn(c, metadata)
+	return NewConn(c, s), err
+}
+
+// ListenPacketContext implements C.ProxyAdapter
+func (s *Snell) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
+	c, err := dialer.DialContext(ctx, "tcp", s.addr, s.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, err
+	}
+	tcpKeepAlive(c)
+	c = streamConn(c, streamOption{s.psk, s.version, s.addr, s.obfsOption})
+
+	err = snell.WriteUDPHeader(c, s.version)
+	if err != nil {
+		return nil, err
+	}
+
+	pc := snell.PacketConn(c)
+	return newPacketConn(pc, s), nil
+}
+
+func NewSnell(option SnellOption) (*Snell, error) {
+	addr := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
+	psk := []byte(option.Psk)
+
+	decoder := structure.NewDecoder(structure.Option{TagName: "obfs", WeaklyTypedInput: true})
+	obfsOption := &simpleObfsOption{Host: "bing.com"}
+	if err := decoder.Decode(option.ObfsOpts, obfsOption); err != nil {
+		return nil, fmt.Errorf("snell %s initialize obfs error: %w", addr, err)
+	}
+
+	switch obfsOption.Mode {
+	case "tls", "http", "":
+		break
+	default:
+		return nil, fmt.Errorf("snell %s obfs mode error: %s", addr, obfsOption.Mode)
+	}
+
+	// backward compatible
+	if option.Version == 0 {
+		option.Version = snell.DefaultSnellVersion
+	}
+	switch option.Version {
+	case snell.Version1, snell.Version2:
+		if option.UDP {
+			return nil, fmt.Errorf("snell version %d not support UDP", option.Version)
+		}
+	case snell.Version3:
+	default:
+		return nil, fmt.Errorf("snell version error: %d", option.Version)
+	}
+
+	s := &Snell{
+		Base: &Base{
+			name:  option.Name,
+			addr:  addr,
+			tp:    C.Snell,
+			udp:   option.UDP,
+			iface: option.Interface,
+			rmark: option.RoutingMark,
+		},
+		psk:        psk,
+		obfsOption: obfsOption,
+		version:    option.Version,
+	}
+
+	if option.Version == snell.Version2 {
+		s.pool = snell.NewPool(func(ctx context.Context) (*snell.Snell, error) {
+			c, err := dialer.DialContext(ctx, "tcp", addr, s.Base.DialOptions()...)
+			if err != nil {
+				return nil, err
+			}
+
+			tcpKeepAlive(c)
+			return streamConn(c, streamOption{psk, option.Version, addr, obfsOption}), nil
+		})
+	}
+	return s, nil
+}

adapter/outbound/socks5.go

@@ -0,0 +1,204 @@
+package outbound
+
+import (
+	"context"
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"strconv"
+
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/transport/socks5"
+)
+
+type Socks5 struct {
+	*Base
+	user           string
+	pass           string
+	tls            bool
+	skipCertVerify bool
+	tlsConfig      *tls.Config
+}
+
+type Socks5Option struct {
+	BasicOption
+	Name           string `proxy:"name"`
+	Server         string `proxy:"server"`
+	Port           int    `proxy:"port"`
+	UserName       string `proxy:"username,omitempty"`
+	Password       string `proxy:"password,omitempty"`
+	TLS            bool   `proxy:"tls,omitempty"`
+	UDP            bool   `proxy:"udp,omitempty"`
+	SkipCertVerify bool   `proxy:"skip-cert-verify,omitempty"`
+}
+
+// StreamConn implements C.ProxyAdapter
+func (ss *Socks5) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+	if ss.tls {
+		cc := tls.Client(c, ss.tlsConfig)
+		err := cc.Handshake()
+		c = cc
+		if err != nil {
+			return nil, fmt.Errorf("%s connect error: %w", ss.addr, err)
+		}
+	}
+
+	var user *socks5.User
+	if ss.user != "" {
+		user = &socks5.User{
+			Username: ss.user,
+			Password: ss.pass,
+		}
+	}
+	if _, err := socks5.ClientHandshake(c, serializesSocksAddr(metadata), socks5.CmdConnect, user); err != nil {
+		return nil, err
+	}
+	return c, nil
+}
+
+// DialContext implements C.ProxyAdapter
+func (ss *Socks5) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
+	c, err := dialer.DialContext(ctx, "tcp", ss.addr, ss.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %w", ss.addr, err)
+	}
+	tcpKeepAlive(c)
+
+	defer safeConnClose(c, err)
+
+	c, err = ss.StreamConn(c, metadata)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewConn(c, ss), nil
+}
+
+// ListenPacketContext implements C.ProxyAdapter
+func (ss *Socks5) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
+	c, err := dialer.DialContext(ctx, "tcp", ss.addr, ss.Base.DialOptions(opts...)...)
+	if err != nil {
+		err = fmt.Errorf("%s connect error: %w", ss.addr, err)
+		return
+	}
+
+	if ss.tls {
+		cc := tls.Client(c, ss.tlsConfig)
+		err = cc.Handshake()
+		c = cc
+	}
+
+	defer safeConnClose(c, err)
+
+	tcpKeepAlive(c)
+	var user *socks5.User
+	if ss.user != "" {
+		user = &socks5.User{
+			Username: ss.user,
+			Password: ss.pass,
+		}
+	}
+
+	bindAddr, err := socks5.ClientHandshake(c, serializesSocksAddr(metadata), socks5.CmdUDPAssociate, user)
+	if err != nil {
+		err = fmt.Errorf("client hanshake error: %w", err)
+		return
+	}
+
+	pc, err := dialer.ListenPacket(ctx, "udp", "", ss.Base.DialOptions(opts...)...)
+	if err != nil {
+		return
+	}
+
+	go func() {
+		io.Copy(io.Discard, c)
+		c.Close()
+		// A UDP association terminates when the TCP connection that the UDP
+		// ASSOCIATE request arrived on terminates. RFC1928
+		pc.Close()
+	}()
+
+	// Support unspecified UDP bind address.
+	bindUDPAddr := bindAddr.UDPAddr()
+	if bindUDPAddr == nil {
+		err = errors.New("invalid UDP bind address")
+		return
+	} else if bindUDPAddr.IP.IsUnspecified() {
+		serverAddr, err := resolveUDPAddr("udp", ss.Addr())
+		if err != nil {
+			return nil, err
+		}
+
+		bindUDPAddr.IP = serverAddr.IP
+	}
+
+	return newPacketConn(&socksPacketConn{PacketConn: pc, rAddr: bindUDPAddr, tcpConn: c}, ss), nil
+}
+
+func NewSocks5(option Socks5Option) *Socks5 {
+	var tlsConfig *tls.Config
+	if option.TLS {
+		tlsConfig = &tls.Config{
+			InsecureSkipVerify: option.SkipCertVerify,
+			ServerName:         option.Server,
+		}
+	}
+
+	return &Socks5{
+		Base: &Base{
+			name:  option.Name,
+			addr:  net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
+			tp:    C.Socks5,
+			udp:   option.UDP,
+			iface: option.Interface,
+			rmark: option.RoutingMark,
+		},
+		user:           option.UserName,
+		pass:           option.Password,
+		tls:            option.TLS,
+		skipCertVerify: option.SkipCertVerify,
+		tlsConfig:      tlsConfig,
+	}
+}
+
+type socksPacketConn struct {
+	net.PacketConn
+	rAddr   net.Addr
+	tcpConn net.Conn
+}
+
+func (uc *socksPacketConn) WriteTo(b []byte, addr net.Addr) (n int, err error) {
+	packet, err := socks5.EncodeUDPPacket(socks5.ParseAddrToSocksAddr(addr), b)
+	if err != nil {
+		return
+	}
+	return uc.PacketConn.WriteTo(packet, uc.rAddr)
+}
+
+func (uc *socksPacketConn) ReadFrom(b []byte) (int, net.Addr, error) {
+	n, _, e := uc.PacketConn.ReadFrom(b)
+	if e != nil {
+		return 0, nil, e
+	}
+	addr, payload, err := socks5.DecodeUDPPacket(b)
+	if err != nil {
+		return 0, nil, err
+	}
+
+	udpAddr := addr.UDPAddr()
+	if udpAddr == nil {
+		return 0, nil, errors.New("parse udp addr error")
+	}
+
+	// due to DecodeUDPPacket is mutable, record addr length
+	copy(b, payload)
+	return n - len(addr) - 3, udpAddr, nil
+}
+
+func (uc *socksPacketConn) Close() error {
+	uc.tcpConn.Close()
+	return uc.PacketConn.Close()
+}

adapter/outbound/trojan.go

@@ -0,0 +1,238 @@
+package outbound
+
+import (
+	"context"
+	"crypto/tls"
+	"fmt"
+	"net"
+	"net/http"
+	"strconv"
+
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/transport/gun"
+	"github.com/Dreamacro/clash/transport/trojan"
+	"github.com/Dreamacro/clash/transport/vless"
+
+	"golang.org/x/net/http2"
+)
+
+type Trojan struct {
+	*Base
+	instance *trojan.Trojan
+	option   *TrojanOption
+
+	// for gun mux
+	gunTLSConfig *tls.Config
+	gunConfig    *gun.Config
+	transport    *http2.Transport
+}
+
+type TrojanOption struct {
+	BasicOption
+	Name           string      `proxy:"name"`
+	Server         string      `proxy:"server"`
+	Port           int         `proxy:"port"`
+	Password       string      `proxy:"password"`
+	ALPN           []string    `proxy:"alpn,omitempty"`
+	SNI            string      `proxy:"sni,omitempty"`
+	SkipCertVerify bool        `proxy:"skip-cert-verify,omitempty"`
+	UDP            bool        `proxy:"udp,omitempty"`
+	Network        string      `proxy:"network,omitempty"`
+	GrpcOpts       GrpcOptions `proxy:"grpc-opts,omitempty"`
+	WSOpts         WSOptions   `proxy:"ws-opts,omitempty"`
+	Flow           string      `proxy:"flow,omitempty"`
+	FlowShow       bool        `proxy:"flow-show,omitempty"`
+}
+
+func (t *Trojan) plainStream(c net.Conn) (net.Conn, error) {
+	if t.option.Network == "ws" {
+		host, port, _ := net.SplitHostPort(t.addr)
+		wsOpts := &trojan.WebsocketOption{
+			Host: host,
+			Port: port,
+			Path: t.option.WSOpts.Path,
+		}
+
+		if t.option.SNI != "" {
+			wsOpts.Host = t.option.SNI
+		}
+
+		if len(t.option.WSOpts.Headers) != 0 {
+			header := http.Header{}
+			for key, value := range t.option.WSOpts.Headers {
+				header.Add(key, value)
+			}
+			wsOpts.Headers = header
+		}
+
+		return t.instance.StreamWebsocketConn(c, wsOpts)
+	}
+
+	return t.instance.StreamConn(c)
+}
+
+// StreamConn implements C.ProxyAdapter
+func (t *Trojan) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+	var err error
+	if t.transport != nil {
+		c, err = gun.StreamGunWithConn(c, t.gunTLSConfig, t.gunConfig)
+	} else {
+		c, err = t.plainStream(c)
+	}
+
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
+	}
+
+	c, err = t.instance.PresetXTLSConn(c)
+	if err != nil {
+		return nil, err
+	}
+
+	err = t.instance.WriteHeader(c, trojan.CommandTCP, serializesSocksAddr(metadata))
+	return c, err
+}
+
+// DialContext implements C.ProxyAdapter
+func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
+	// gun transport
+	if t.transport != nil && len(opts) == 0 {
+		c, err := gun.StreamGunWithTransport(t.transport, t.gunConfig)
+		if err != nil {
+			return nil, err
+		}
+
+		c, err = t.instance.PresetXTLSConn(c)
+		if err != nil {
+			c.Close()
+			return nil, err
+		}
+
+		if err = t.instance.WriteHeader(c, trojan.CommandTCP, serializesSocksAddr(metadata)); err != nil {
+			c.Close()
+			return nil, err
+		}
+
+		return NewConn(c, t), nil
+	}
+
+	c, err := dialer.DialContext(ctx, "tcp", t.addr, t.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
+	}
+	tcpKeepAlive(c)
+
+	defer safeConnClose(c, err)
+
+	c, err = t.StreamConn(c, metadata)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewConn(c, t), err
+}
+
+// ListenPacketContext implements C.ProxyAdapter
+func (t *Trojan) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
+	var c net.Conn
+
+	// grpc transport
+	if t.transport != nil && len(opts) == 0 {
+		c, err = gun.StreamGunWithTransport(t.transport, t.gunConfig)
+		if err != nil {
+			return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
+		}
+		defer safeConnClose(c, err)
+	} else {
+		c, err = dialer.DialContext(ctx, "tcp", t.addr, t.Base.DialOptions(opts...)...)
+		if err != nil {
+			return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
+		}
+		defer safeConnClose(c, err)
+		tcpKeepAlive(c)
+		c, err = t.plainStream(c)
+		if err != nil {
+			return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
+		}
+	}
+
+	err = t.instance.WriteHeader(c, trojan.CommandUDP, serializesSocksAddr(metadata))
+	if err != nil {
+		return nil, err
+	}
+
+	pc := t.instance.PacketConn(c)
+	return newPacketConn(pc, t), err
+}
+
+func NewTrojan(option TrojanOption) (*Trojan, error) {
+	addr := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
+
+	tOption := &trojan.Option{
+		Password:       option.Password,
+		ALPN:           option.ALPN,
+		ServerName:     option.Server,
+		SkipCertVerify: option.SkipCertVerify,
+		FlowShow:       option.FlowShow,
+	}
+
+	if option.Network != "ws" && len(option.Flow) >= 16 {
+		option.Flow = option.Flow[:16]
+		switch option.Flow {
+		case vless.XRO, vless.XRD, vless.XRS:
+			tOption.Flow = option.Flow
+		default:
+			return nil, fmt.Errorf("unsupported xtls flow type: %s", option.Flow)
+		}
+	}
+
+	if option.SNI != "" {
+		tOption.ServerName = option.SNI
+	}
+
+	t := &Trojan{
+		Base: &Base{
+			name:  option.Name,
+			addr:  addr,
+			tp:    C.Trojan,
+			udp:   option.UDP,
+			iface: option.Interface,
+			rmark: option.RoutingMark,
+		},
+		instance: trojan.New(tOption),
+		option:   &option,
+	}
+
+	if option.Network == "grpc" {
+		dialFn := func(network, addr string) (net.Conn, error) {
+			c, err := dialer.DialContext(context.Background(), "tcp", t.addr, t.Base.DialOptions()...)
+			if err != nil {
+				return nil, fmt.Errorf("%s connect error: %s", t.addr, err.Error())
+			}
+			tcpKeepAlive(c)
+			return c, nil
+		}
+
+		tlsConfig := &tls.Config{
+			NextProtos:         option.ALPN,
+			MinVersion:         tls.VersionTLS12,
+			InsecureSkipVerify: tOption.SkipCertVerify,
+			ServerName:         tOption.ServerName,
+		}
+
+		if t.option.Flow != "" {
+			t.transport = gun.NewHTTP2XTLSClient(dialFn, tlsConfig)
+		} else {
+			t.transport = gun.NewHTTP2Client(dialFn, tlsConfig)
+		}
+
+		t.gunTLSConfig = tlsConfig
+		t.gunConfig = &gun.Config{
+			ServiceName: option.GrpcOpts.GrpcServiceName,
+			Host:        tOption.ServerName,
+		}
+	}
+
+	return t, nil
+}

adapter/outbound/util.go

@@ -0,0 +1,58 @@
+package outbound
+
+import (
+	"bytes"
+	"net"
+	"strconv"
+	"time"
+
+	"github.com/Dreamacro/clash/component/resolver"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/transport/socks5"
+)
+
+func tcpKeepAlive(c net.Conn) {
+	if tcp, ok := c.(*net.TCPConn); ok {
+		_ = tcp.SetKeepAlive(true)
+		_ = tcp.SetKeepAlivePeriod(30 * time.Second)
+	}
+}
+
+func serializesSocksAddr(metadata *C.Metadata) []byte {
+	var buf [][]byte
+	aType := uint8(metadata.AddrType)
+	p, _ := strconv.ParseUint(metadata.DstPort, 10, 16)
+	port := []byte{uint8(p >> 8), uint8(p & 0xff)}
+	switch metadata.AddrType {
+	case socks5.AtypDomainName:
+		lenM := uint8(len(metadata.Host))
+		host := []byte(metadata.Host)
+		buf = [][]byte{{aType, lenM}, host, port}
+	case socks5.AtypIPv4:
+		host := metadata.DstIP.AsSlice()
+		buf = [][]byte{{aType}, host, port}
+	case socks5.AtypIPv6:
+		host := metadata.DstIP.AsSlice()
+		buf = [][]byte{{aType}, host, port}
+	}
+	return bytes.Join(buf, nil)
+}
+
+func resolveUDPAddr(network, address string) (*net.UDPAddr, error) {
+	host, port, err := net.SplitHostPort(address)
+	if err != nil {
+		return nil, err
+	}
+
+	ip, err := resolver.ResolveProxyServerHost(host)
+	if err != nil {
+		return nil, err
+	}
+	return net.ResolveUDPAddr(network, net.JoinHostPort(ip.String(), port))
+}
+
+func safeConnClose(c net.Conn, err error) {
+	if err != nil {
+		_ = c.Close()
+	}
+}

adapter/outbound/vless.go

@@ -0,0 +1,450 @@
+package outbound
+
+import (
+	"context"
+	"crypto/tls"
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"strconv"
+	"sync"
+
+	"github.com/Dreamacro/clash/component/dialer"
+	"github.com/Dreamacro/clash/component/resolver"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/transport/gun"
+	"github.com/Dreamacro/clash/transport/vless"
+	"github.com/Dreamacro/clash/transport/vmess"
+
+	"golang.org/x/net/http2"
+)
+
+const (
+	// max packet length
+	maxLength = 1024 << 3
+)
+
+type Vless struct {
+	*Base
+	client *vless.Client
+	option *VlessOption
+
+	// for gun mux
+	gunTLSConfig *tls.Config
+	gunConfig    *gun.Config
+	transport    *http2.Transport
+}
+
+type VlessOption struct {
+	BasicOption
+	Name           string            `proxy:"name"`
+	Server         string            `proxy:"server"`
+	Port           int               `proxy:"port"`
+	UUID           string            `proxy:"uuid"`
+	Flow           string            `proxy:"flow,omitempty"`
+	FlowShow       bool              `proxy:"flow-show,omitempty"`
+	UDP            bool              `proxy:"udp,omitempty"`
+	Network        string            `proxy:"network,omitempty"`
+	HTTPOpts       HTTPOptions       `proxy:"http-opts,omitempty"`
+	HTTP2Opts      HTTP2Options      `proxy:"h2-opts,omitempty"`
+	GrpcOpts       GrpcOptions       `proxy:"grpc-opts,omitempty"`
+	WSOpts         WSOptions         `proxy:"ws-opts,omitempty"`
+	WSPath         string            `proxy:"ws-path,omitempty"`
+	WSHeaders      map[string]string `proxy:"ws-headers,omitempty"`
+	SkipCertVerify bool              `proxy:"skip-cert-verify,omitempty"`
+	ServerName     string            `proxy:"servername,omitempty"`
+}
+
+func (v *Vless) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+	var err error
+	switch v.option.Network {
+	case "ws":
+		if v.option.WSOpts.Path == "" {
+			v.option.WSOpts.Path = v.option.WSPath
+		}
+		if len(v.option.WSOpts.Headers) == 0 {
+			v.option.WSOpts.Headers = v.option.WSHeaders
+		}
+
+		host, port, _ := net.SplitHostPort(v.addr)
+		wsOpts := &vmess.WebsocketConfig{
+			Host:                host,
+			Port:                port,
+			Path:                v.option.WSOpts.Path,
+			MaxEarlyData:        v.option.WSOpts.MaxEarlyData,
+			EarlyDataHeaderName: v.option.WSOpts.EarlyDataHeaderName,
+		}
+
+		if len(v.option.WSOpts.Headers) != 0 {
+			header := http.Header{}
+			for key, value := range v.option.WSOpts.Headers {
+				header.Add(key, value)
+			}
+			wsOpts.Headers = header
+		}
+
+		wsOpts.TLS = true
+		wsOpts.TLSConfig = &tls.Config{
+			MinVersion:         tls.VersionTLS12,
+			ServerName:         host,
+			InsecureSkipVerify: v.option.SkipCertVerify,
+			NextProtos:         []string{"http/1.1"},
+		}
+		if v.option.ServerName != "" {
+			wsOpts.TLSConfig.ServerName = v.option.ServerName
+		} else if host := wsOpts.Headers.Get("Host"); host != "" {
+			wsOpts.TLSConfig.ServerName = host
+		}
+
+		c, err = vmess.StreamWebsocketConn(c, wsOpts)
+	case "http":
+		// readability first, so just copy default TLS logic
+		c, err = v.streamTLSOrXTLSConn(c, false)
+		if err != nil {
+			return nil, err
+		}
+
+		host, _, _ := net.SplitHostPort(v.addr)
+		httpOpts := &vmess.HTTPConfig{
+			Host:    host,
+			Method:  v.option.HTTPOpts.Method,
+			Path:    v.option.HTTPOpts.Path,
+			Headers: v.option.HTTPOpts.Headers,
+		}
+
+		c = vmess.StreamHTTPConn(c, httpOpts)
+	case "h2":
+		c, err = v.streamTLSOrXTLSConn(c, true)
+		if err != nil {
+			return nil, err
+		}
+
+		h2Opts := &vmess.H2Config{
+			Hosts: v.option.HTTP2Opts.Host,
+			Path:  v.option.HTTP2Opts.Path,
+		}
+
+		c, err = vmess.StreamH2Conn(c, h2Opts)
+	case "grpc":
+		if v.isXTLSEnabled() {
+			c, err = gun.StreamGunWithXTLSConn(c, v.gunTLSConfig, v.gunConfig)
+		} else {
+			c, err = gun.StreamGunWithConn(c, v.gunTLSConfig, v.gunConfig)
+		}
+	default:
+		// default tcp network
+		// handle TLS And XTLS
+		c, err = v.streamTLSOrXTLSConn(c, false)
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	return v.client.StreamConn(c, parseVlessAddr(metadata))
+}
+
+func (v *Vless) streamTLSOrXTLSConn(conn net.Conn, isH2 bool) (net.Conn, error) {
+	host, _, _ := net.SplitHostPort(v.addr)
+
+	if v.isXTLSEnabled() {
+		xtlsOpts := vless.XTLSConfig{
+			Host:           host,
+			SkipCertVerify: v.option.SkipCertVerify,
+		}
+
+		if isH2 {
+			xtlsOpts.NextProtos = []string{"h2"}
+		}
+
+		if v.option.ServerName != "" {
+			xtlsOpts.Host = v.option.ServerName
+		}
+
+		return vless.StreamXTLSConn(conn, &xtlsOpts)
+
+	} else {
+		tlsOpts := vmess.TLSConfig{
+			Host:           host,
+			SkipCertVerify: v.option.SkipCertVerify,
+		}
+
+		if isH2 {
+			tlsOpts.NextProtos = []string{"h2"}
+		}
+
+		if v.option.ServerName != "" {
+			tlsOpts.Host = v.option.ServerName
+		}
+
+		return vmess.StreamTLSConn(conn, &tlsOpts)
+	}
+}
+
+func (v *Vless) isXTLSEnabled() bool {
+	return v.client.Addons != nil
+}
+
+// DialContext implements C.ProxyAdapter
+func (v *Vless) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
+	// gun transport
+	if v.transport != nil && len(opts) == 0 {
+		c, err := gun.StreamGunWithTransport(v.transport, v.gunConfig)
+		if err != nil {
+			return nil, err
+		}
+		defer safeConnClose(c, err)
+
+		c, err = v.client.StreamConn(c, parseVlessAddr(metadata))
+		if err != nil {
+			return nil, err
+		}
+
+		return NewConn(c, v), nil
+	}
+
+	c, err := dialer.DialContext(ctx, "tcp", v.addr, v.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
+	}
+	tcpKeepAlive(c)
+	defer safeConnClose(c, err)
+
+	c, err = v.StreamConn(c, metadata)
+	return NewConn(c, v), err
+}
+
+// ListenPacketContext implements C.ProxyAdapter
+func (v *Vless) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
+	// vless use stream-oriented udp with a special address, so we needs a net.UDPAddr
+	if !metadata.Resolved() {
+		ip, err := resolver.ResolveIP(metadata.Host)
+		if err != nil {
+			return nil, errors.New("can't resolve ip")
+		}
+		metadata.DstIP = ip
+	}
+
+	var c net.Conn
+	// gun transport
+	if v.transport != nil && len(opts) == 0 {
+		c, err = gun.StreamGunWithTransport(v.transport, v.gunConfig)
+		if err != nil {
+			return nil, err
+		}
+		defer safeConnClose(c, err)
+
+		c, err = v.client.StreamConn(c, parseVlessAddr(metadata))
+	} else {
+		c, err = dialer.DialContext(ctx, "tcp", v.addr, v.Base.DialOptions(opts...)...)
+		if err != nil {
+			return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
+		}
+		tcpKeepAlive(c)
+		defer safeConnClose(c, err)
+
+		c, err = v.StreamConn(c, metadata)
+	}
+
+	if err != nil {
+		return nil, fmt.Errorf("new vless client error: %v", err)
+	}
+
+	return newPacketConn(&vlessPacketConn{Conn: c, rAddr: metadata.UDPAddr()}, v), nil
+}
+
+func parseVlessAddr(metadata *C.Metadata) *vless.DstAddr {
+	var addrType byte
+	var addr []byte
+	switch metadata.AddrType {
+	case C.AtypIPv4:
+		addrType = byte(vless.AtypIPv4)
+		addr = make([]byte, net.IPv4len)
+		copy(addr[:], metadata.DstIP.AsSlice())
+	case C.AtypIPv6:
+		addrType = byte(vless.AtypIPv6)
+		addr = make([]byte, net.IPv6len)
+		copy(addr[:], metadata.DstIP.AsSlice())
+	case C.AtypDomainName:
+		addrType = byte(vless.AtypDomainName)
+		addr = make([]byte, len(metadata.Host)+1)
+		addr[0] = byte(len(metadata.Host))
+		copy(addr[1:], []byte(metadata.Host))
+	}
+
+	port, _ := strconv.ParseUint(metadata.DstPort, 10, 16)
+	return &vless.DstAddr{
+		UDP:      metadata.NetWork == C.UDP,
+		AddrType: addrType,
+		Addr:     addr,
+		Port:     uint(port),
+	}
+}
+
+type vlessPacketConn struct {
+	net.Conn
+	rAddr  net.Addr
+	cache  [2]byte
+	remain int
+	mux    sync.Mutex
+}
+
+func (vc *vlessPacketConn) WriteTo(b []byte, addr net.Addr) (int, error) {
+	total := len(b)
+	if total == 0 {
+		return 0, nil
+	}
+
+	if total < maxLength {
+		return vc.writePacket(b)
+	}
+
+	offset := 0
+	for {
+		cursor := offset + maxLength
+		if cursor > total {
+			cursor = total
+		}
+
+		n, err := vc.writePacket(b[offset:cursor])
+		if err != nil {
+			return offset + n, err
+		}
+
+		offset = cursor
+		if offset == total {
+			break
+		}
+	}
+
+	return total, nil
+}
+
+func (vc *vlessPacketConn) ReadFrom(b []byte) (int, net.Addr, error) {
+	vc.mux.Lock()
+	defer vc.mux.Unlock()
+
+	if vc.remain != 0 {
+		length := len(b)
+		if length > vc.remain {
+			length = vc.remain
+		}
+
+		n, err := vc.Conn.Read(b[:length])
+		if err != nil {
+			return 0, vc.rAddr, err
+		}
+
+		vc.remain -= n
+
+		return n, vc.rAddr, nil
+	}
+
+	if _, err := vc.Conn.Read(b[:2]); err != nil {
+		return 0, vc.rAddr, err
+	}
+
+	total := int(binary.BigEndian.Uint16(b[:2]))
+	if total == 0 {
+		return 0, vc.rAddr, nil
+	}
+
+	length := len(b)
+	if length > total {
+		length = total
+	}
+
+	if _, err := io.ReadFull(vc.Conn, b[:length]); err != nil {
+		return 0, vc.rAddr, errors.New("read packet error")
+	}
+
+	vc.remain = total - length
+
+	return length, vc.rAddr, nil
+}
+
+func (vc *vlessPacketConn) writePacket(payload []byte) (int, error) {
+	binary.BigEndian.PutUint16(vc.cache[:], uint16(len(payload)))
+
+	if _, err := vc.Conn.Write(vc.cache[:]); err != nil {
+		return 0, err
+	}
+
+	return vc.Conn.Write(payload)
+}
+
+func NewVless(option VlessOption) (*Vless, error) {
+	var addons *vless.Addons
+	if option.Network != "ws" && len(option.Flow) >= 16 {
+		option.Flow = option.Flow[:16]
+		switch option.Flow {
+		case vless.XRO, vless.XRD, vless.XRS:
+			addons = &vless.Addons{
+				Flow: option.Flow,
+			}
+		default:
+			return nil, fmt.Errorf("unsupported xtls flow type: %s", option.Flow)
+		}
+	}
+
+	client, err := vless.NewClient(option.UUID, addons, option.FlowShow)
+	if err != nil {
+		return nil, err
+	}
+
+	v := &Vless{
+		Base: &Base{
+			name:  option.Name,
+			addr:  net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
+			tp:    C.Vless,
+			udp:   option.UDP,
+			iface: option.Interface,
+		},
+		client: client,
+		option: &option,
+	}
+
+	switch option.Network {
+	case "h2":
+		if len(option.HTTP2Opts.Host) == 0 {
+			option.HTTP2Opts.Host = append(option.HTTP2Opts.Host, "www.example.com")
+		}
+	case "grpc":
+		dialFn := func(network, addr string) (net.Conn, error) {
+			c, err := dialer.DialContext(context.Background(), "tcp", v.addr, v.Base.DialOptions()...)
+			if err != nil {
+				return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
+			}
+			tcpKeepAlive(c)
+			return c, nil
+		}
+
+		gunConfig := &gun.Config{
+			ServiceName: v.option.GrpcOpts.GrpcServiceName,
+			Host:        v.option.ServerName,
+		}
+		tlsConfig := &tls.Config{
+			InsecureSkipVerify: v.option.SkipCertVerify,
+			ServerName:         v.option.ServerName,
+		}
+
+		if v.option.ServerName == "" {
+			host, _, _ := net.SplitHostPort(v.addr)
+			tlsConfig.ServerName = host
+			gunConfig.Host = host
+		}
+
+		v.gunTLSConfig = tlsConfig
+		v.gunConfig = gunConfig
+		if v.isXTLSEnabled() {
+			v.transport = gun.NewHTTP2XTLSClient(dialFn, tlsConfig)
+		} else {
+			v.transport = gun.NewHTTP2Client(dialFn, tlsConfig)
+		}
+	}
+
+	return v, nil
+}

adapter/outbound/vmess.go

@@ -0,0 +1,378 @@
+package outbound
+
+import (
+	"context"
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"net"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"github.com/Dreamacro/clash/component/dialer"
+	"github.com/Dreamacro/clash/component/resolver"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/transport/gun"
+	"github.com/Dreamacro/clash/transport/vmess"
+
+	"golang.org/x/net/http2"
+)
+
+type Vmess struct {
+	*Base
+	client *vmess.Client
+	option *VmessOption
+
+	// for gun mux
+	gunTLSConfig *tls.Config
+	gunConfig    *gun.Config
+	transport    *http2.Transport
+}
+
+type VmessOption struct {
+	BasicOption
+	Name           string       `proxy:"name"`
+	Server         string       `proxy:"server"`
+	Port           int          `proxy:"port"`
+	UUID           string       `proxy:"uuid"`
+	AlterID        int          `proxy:"alterId"`
+	Cipher         string       `proxy:"cipher"`
+	UDP            bool         `proxy:"udp,omitempty"`
+	Network        string       `proxy:"network,omitempty"`
+	TLS            bool         `proxy:"tls,omitempty"`
+	SkipCertVerify bool         `proxy:"skip-cert-verify,omitempty"`
+	ServerName     string       `proxy:"servername,omitempty"`
+	HTTPOpts       HTTPOptions  `proxy:"http-opts,omitempty"`
+	HTTP2Opts      HTTP2Options `proxy:"h2-opts,omitempty"`
+	GrpcOpts       GrpcOptions  `proxy:"grpc-opts,omitempty"`
+	WSOpts         WSOptions    `proxy:"ws-opts,omitempty"`
+
+	// TODO: compatible with VMESS WS older version configurations
+	WSHeaders map[string]string `proxy:"ws-headers,omitempty"`
+	WSPath    string            `proxy:"ws-path,omitempty"`
+}
+
+type HTTPOptions struct {
+	Method  string              `proxy:"method,omitempty"`
+	Path    []string            `proxy:"path,omitempty"`
+	Headers map[string][]string `proxy:"headers,omitempty"`
+}
+
+type HTTP2Options struct {
+	Host []string `proxy:"host,omitempty"`
+	Path string   `proxy:"path,omitempty"`
+}
+
+type GrpcOptions struct {
+	GrpcServiceName string `proxy:"grpc-service-name,omitempty"`
+}
+
+type WSOptions struct {
+	Path                string            `proxy:"path,omitempty"`
+	Headers             map[string]string `proxy:"headers,omitempty"`
+	MaxEarlyData        int               `proxy:"max-early-data,omitempty"`
+	EarlyDataHeaderName string            `proxy:"early-data-header-name,omitempty"`
+}
+
+// StreamConn implements C.ProxyAdapter
+func (v *Vmess) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+	var err error
+	switch v.option.Network {
+	case "ws":
+		if v.option.WSOpts.Path == "" {
+			v.option.WSOpts.Path = v.option.WSPath
+		}
+		if len(v.option.WSOpts.Headers) == 0 {
+			v.option.WSOpts.Headers = v.option.WSHeaders
+		}
+
+		host, port, _ := net.SplitHostPort(v.addr)
+		wsOpts := &vmess.WebsocketConfig{
+			Host:                host,
+			Port:                port,
+			Path:                v.option.WSOpts.Path,
+			MaxEarlyData:        v.option.WSOpts.MaxEarlyData,
+			EarlyDataHeaderName: v.option.WSOpts.EarlyDataHeaderName,
+		}
+
+		if len(v.option.WSOpts.Headers) != 0 {
+			header := http.Header{}
+			for key, value := range v.option.WSOpts.Headers {
+				header.Add(key, value)
+			}
+			wsOpts.Headers = header
+		}
+
+		if v.option.TLS {
+			wsOpts.TLS = true
+			wsOpts.TLSConfig = &tls.Config{
+				ServerName:         host,
+				InsecureSkipVerify: v.option.SkipCertVerify,
+				NextProtos:         []string{"http/1.1"},
+			}
+			if v.option.ServerName != "" {
+				wsOpts.TLSConfig.ServerName = v.option.ServerName
+			} else if host := wsOpts.Headers.Get("Host"); host != "" {
+				wsOpts.TLSConfig.ServerName = host
+			}
+		}
+		c, err = vmess.StreamWebsocketConn(c, wsOpts)
+	case "http":
+		// readability first, so just copy default TLS logic
+		if v.option.TLS {
+			host, _, _ := net.SplitHostPort(v.addr)
+			tlsOpts := &vmess.TLSConfig{
+				Host:           host,
+				SkipCertVerify: v.option.SkipCertVerify,
+			}
+
+			if v.option.ServerName != "" {
+				tlsOpts.Host = v.option.ServerName
+			}
+
+			c, err = vmess.StreamTLSConn(c, tlsOpts)
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		host, _, _ := net.SplitHostPort(v.addr)
+		httpOpts := &vmess.HTTPConfig{
+			Host:    host,
+			Method:  v.option.HTTPOpts.Method,
+			Path:    v.option.HTTPOpts.Path,
+			Headers: v.option.HTTPOpts.Headers,
+		}
+
+		c = vmess.StreamHTTPConn(c, httpOpts)
+	case "h2":
+		host, _, _ := net.SplitHostPort(v.addr)
+		tlsOpts := vmess.TLSConfig{
+			Host:           host,
+			SkipCertVerify: v.option.SkipCertVerify,
+			NextProtos:     []string{"h2"},
+		}
+
+		if v.option.ServerName != "" {
+			tlsOpts.Host = v.option.ServerName
+		}
+
+		c, err = vmess.StreamTLSConn(c, &tlsOpts)
+		if err != nil {
+			return nil, err
+		}
+
+		h2Opts := &vmess.H2Config{
+			Hosts: v.option.HTTP2Opts.Host,
+			Path:  v.option.HTTP2Opts.Path,
+		}
+
+		c, err = vmess.StreamH2Conn(c, h2Opts)
+	case "grpc":
+		c, err = gun.StreamGunWithConn(c, v.gunTLSConfig, v.gunConfig)
+	default:
+		// handle TLS
+		if v.option.TLS {
+			host, _, _ := net.SplitHostPort(v.addr)
+			tlsOpts := &vmess.TLSConfig{
+				Host:           host,
+				SkipCertVerify: v.option.SkipCertVerify,
+			}
+
+			if v.option.ServerName != "" {
+				tlsOpts.Host = v.option.ServerName
+			}
+
+			c, err = vmess.StreamTLSConn(c, tlsOpts)
+		}
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	return v.client.StreamConn(c, parseVmessAddr(metadata))
+}
+
+// DialContext implements C.ProxyAdapter
+func (v *Vmess) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
+	// gun transport
+	if v.transport != nil && len(opts) == 0 {
+		c, err := gun.StreamGunWithTransport(v.transport, v.gunConfig)
+		if err != nil {
+			return nil, err
+		}
+		defer safeConnClose(c, err)
+
+		c, err = v.client.StreamConn(c, parseVmessAddr(metadata))
+		if err != nil {
+			return nil, err
+		}
+
+		return NewConn(c, v), nil
+	}
+
+	c, err := dialer.DialContext(ctx, "tcp", v.addr, v.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
+	}
+	tcpKeepAlive(c)
+	defer safeConnClose(c, err)
+
+	c, err = v.StreamConn(c, metadata)
+	return NewConn(c, v), err
+}
+
+// ListenPacketContext implements C.ProxyAdapter
+func (v *Vmess) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
+	// vmess use stream-oriented udp with a special address, so we needs a net.UDPAddr
+	if !metadata.Resolved() {
+		ip, err := resolver.ResolveIP(metadata.Host)
+		if err != nil {
+			return nil, errors.New("can't resolve ip")
+		}
+		metadata.DstIP = ip
+	}
+
+	var c net.Conn
+	// gun transport
+	if v.transport != nil && len(opts) == 0 {
+		c, err = gun.StreamGunWithTransport(v.transport, v.gunConfig)
+		if err != nil {
+			return nil, err
+		}
+		defer safeConnClose(c, err)
+
+		c, err = v.client.StreamConn(c, parseVmessAddr(metadata))
+	} else {
+		c, err = dialer.DialContext(ctx, "tcp", v.addr, v.Base.DialOptions(opts...)...)
+		if err != nil {
+			return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
+		}
+		tcpKeepAlive(c)
+		defer safeConnClose(c, err)
+
+		c, err = v.StreamConn(c, metadata)
+	}
+
+	if err != nil {
+		return nil, fmt.Errorf("new vmess client error: %v", err)
+	}
+
+	return newPacketConn(&vmessPacketConn{Conn: c, rAddr: metadata.UDPAddr()}, v), nil
+}
+
+func NewVmess(option VmessOption) (*Vmess, error) {
+	security := strings.ToLower(option.Cipher)
+	client, err := vmess.NewClient(vmess.Config{
+		UUID:     option.UUID,
+		AlterID:  uint16(option.AlterID),
+		Security: security,
+		HostName: option.Server,
+		Port:     strconv.Itoa(option.Port),
+		IsAead:   option.AlterID == 0,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	switch option.Network {
+	case "h2", "grpc":
+		if !option.TLS {
+			return nil, fmt.Errorf("TLS must be true with h2/grpc network")
+		}
+	}
+
+	v := &Vmess{
+		Base: &Base{
+			name:  option.Name,
+			addr:  net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
+			tp:    C.Vmess,
+			udp:   option.UDP,
+			iface: option.Interface,
+			rmark: option.RoutingMark,
+		},
+		client: client,
+		option: &option,
+	}
+
+	switch option.Network {
+	case "h2":
+		if len(option.HTTP2Opts.Host) == 0 {
+			option.HTTP2Opts.Host = append(option.HTTP2Opts.Host, "www.example.com")
+		}
+	case "grpc":
+		dialFn := func(network, addr string) (net.Conn, error) {
+			c, err := dialer.DialContext(context.Background(), "tcp", v.addr, v.Base.DialOptions()...)
+			if err != nil {
+				return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
+			}
+			tcpKeepAlive(c)
+			return c, nil
+		}
+
+		gunConfig := &gun.Config{
+			ServiceName: v.option.GrpcOpts.GrpcServiceName,
+			Host:        v.option.ServerName,
+		}
+		tlsConfig := &tls.Config{
+			InsecureSkipVerify: v.option.SkipCertVerify,
+			ServerName:         v.option.ServerName,
+		}
+
+		if v.option.ServerName == "" {
+			host, _, _ := net.SplitHostPort(v.addr)
+			tlsConfig.ServerName = host
+			gunConfig.Host = host
+		}
+
+		v.gunTLSConfig = tlsConfig
+		v.gunConfig = gunConfig
+		v.transport = gun.NewHTTP2Client(dialFn, tlsConfig)
+	}
+
+	return v, nil
+}
+
+func parseVmessAddr(metadata *C.Metadata) *vmess.DstAddr {
+	var addrType byte
+	var addr []byte
+	switch metadata.AddrType {
+	case C.AtypIPv4:
+		addrType = byte(vmess.AtypIPv4)
+		addr = make([]byte, net.IPv4len)
+		copy(addr[:], metadata.DstIP.AsSlice())
+	case C.AtypIPv6:
+		addrType = byte(vmess.AtypIPv6)
+		addr = make([]byte, net.IPv6len)
+		copy(addr[:], metadata.DstIP.AsSlice())
+	case C.AtypDomainName:
+		addrType = byte(vmess.AtypDomainName)
+		addr = make([]byte, len(metadata.Host)+1)
+		addr[0] = byte(len(metadata.Host))
+		copy(addr[1:], []byte(metadata.Host))
+	}
+
+	port, _ := strconv.ParseUint(metadata.DstPort, 10, 16)
+	return &vmess.DstAddr{
+		UDP:      metadata.NetWork == C.UDP,
+		AddrType: addrType,
+		Addr:     addr,
+		Port:     uint(port),
+	}
+}
+
+type vmessPacketConn struct {
+	net.Conn
+	rAddr net.Addr
+}
+
+func (uc *vmessPacketConn) WriteTo(b []byte, addr net.Addr) (int, error) {
+	return uc.Conn.Write(b)
+}
+
+func (uc *vmessPacketConn) ReadFrom(b []byte) (int, net.Addr, error) {
+	n, err := uc.Conn.Read(b)
+	return n, uc.rAddr, err
+}

adapter/outboundgroup/common.go

@@ -0,0 +1,24 @@
+package outboundgroup
+
+import (
+	"time"
+
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/constant/provider"
+)
+
+const (
+	defaultGetProxiesDuration = time.Second * 5
+)
+
+func getProvidersProxies(providers []provider.ProxyProvider, touch bool) []C.Proxy {
+	proxies := []C.Proxy{}
+	for _, provider := range providers {
+		if touch {
+			proxies = append(proxies, provider.ProxiesWithTouch()...)
+		} else {
+			proxies = append(proxies, provider.Proxies()...)
+		}
+	}
+	return proxies
+}

adapter/outboundgroup/fallback.go

@@ -0,0 +1,106 @@
+package outboundgroup
+
+import (
+	"context"
+	"encoding/json"
+
+	"github.com/Dreamacro/clash/adapter/outbound"
+	"github.com/Dreamacro/clash/common/singledo"
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/constant/provider"
+)
+
+type Fallback struct {
+	*outbound.Base
+	disableUDP bool
+	single     *singledo.Single[[]C.Proxy]
+	providers  []provider.ProxyProvider
+}
+
+func (f *Fallback) Now() string {
+	proxy := f.findAliveProxy(false)
+	return proxy.Name()
+}
+
+// DialContext implements C.ProxyAdapter
+func (f *Fallback) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
+	proxy := f.findAliveProxy(true)
+	c, err := proxy.DialContext(ctx, metadata, f.Base.DialOptions(opts...)...)
+	if err == nil {
+		c.AppendToChains(f)
+	}
+	return c, err
+}
+
+// ListenPacketContext implements C.ProxyAdapter
+func (f *Fallback) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
+	proxy := f.findAliveProxy(true)
+	pc, err := proxy.ListenPacketContext(ctx, metadata, f.Base.DialOptions(opts...)...)
+	if err == nil {
+		pc.AppendToChains(f)
+	}
+	return pc, err
+}
+
+// SupportUDP implements C.ProxyAdapter
+func (f *Fallback) SupportUDP() bool {
+	if f.disableUDP {
+		return false
+	}
+
+	proxy := f.findAliveProxy(false)
+	return proxy.SupportUDP()
+}
+
+// MarshalJSON implements C.ProxyAdapter
+func (f *Fallback) MarshalJSON() ([]byte, error) {
+	var all []string
+	for _, proxy := range f.proxies(false) {
+		all = append(all, proxy.Name())
+	}
+	return json.Marshal(map[string]any{
+		"type": f.Type().String(),
+		"now":  f.Now(),
+		"all":  all,
+	})
+}
+
+// Unwrap implements C.ProxyAdapter
+func (f *Fallback) Unwrap(metadata *C.Metadata) C.Proxy {
+	proxy := f.findAliveProxy(true)
+	return proxy
+}
+
+func (f *Fallback) proxies(touch bool) []C.Proxy {
+	elm, _, _ := f.single.Do(func() ([]C.Proxy, error) {
+		return getProvidersProxies(f.providers, touch), nil
+	})
+
+	return elm
+}
+
+func (f *Fallback) findAliveProxy(touch bool) C.Proxy {
+	proxies := f.proxies(touch)
+	for _, proxy := range proxies {
+		if proxy.Alive() {
+			return proxy
+		}
+	}
+
+	return proxies[0]
+}
+
+func NewFallback(option *GroupCommonOption, providers []provider.ProxyProvider) *Fallback {
+	return &Fallback{
+		Base: outbound.NewBase(outbound.BaseOption{
+			Name:        option.Name,
+			Type:        C.Fallback,
+			Interface:   option.Interface,
+			RoutingMark: option.RoutingMark,
+		}),
+		single:     singledo.NewSingle[[]C.Proxy](defaultGetProxiesDuration),
+		providers:  providers,
+		disableUDP: option.DisableUDP,
+	}
+}

adapter/outboundgroup/loadbalance.go

@@ -0,0 +1,184 @@
+package outboundgroup
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net"
+
+	"github.com/Dreamacro/clash/adapter/outbound"
+	"github.com/Dreamacro/clash/common/murmur3"
+	"github.com/Dreamacro/clash/common/singledo"
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/constant/provider"
+
+	"golang.org/x/net/publicsuffix"
+)
+
+type strategyFn = func(proxies []C.Proxy, metadata *C.Metadata) C.Proxy
+
+type LoadBalance struct {
+	*outbound.Base
+	disableUDP bool
+	single     *singledo.Single[[]C.Proxy]
+	providers  []provider.ProxyProvider
+	strategyFn strategyFn
+}
+
+var errStrategy = errors.New("unsupported strategy")
+
+func parseStrategy(config map[string]any) string {
+	if elm, ok := config["strategy"]; ok {
+		if strategy, ok := elm.(string); ok {
+			return strategy
+		}
+	}
+	return "consistent-hashing"
+}
+
+func getKey(metadata *C.Metadata) string {
+	if metadata.Host != "" {
+		// ip host
+		if ip := net.ParseIP(metadata.Host); ip != nil {
+			return metadata.Host
+		}
+
+		if etld, err := publicsuffix.EffectiveTLDPlusOne(metadata.Host); err == nil {
+			return etld
+		}
+	}
+
+	if !metadata.DstIP.IsValid() {
+		return ""
+	}
+
+	return metadata.DstIP.String()
+}
+
+func jumpHash(key uint64, buckets int32) int32 {
+	var b, j int64
+
+	for j < int64(buckets) {
+		b = j
+		key = key*2862933555777941757 + 1
+		j = int64(float64(b+1) * (float64(int64(1)<<31) / float64((key>>33)+1)))
+	}
+
+	return int32(b)
+}
+
+// DialContext implements C.ProxyAdapter
+func (lb *LoadBalance) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (c C.Conn, err error) {
+	defer func() {
+		if err == nil {
+			c.AppendToChains(lb)
+		}
+	}()
+
+	proxy := lb.Unwrap(metadata)
+
+	c, err = proxy.DialContext(ctx, metadata, lb.Base.DialOptions(opts...)...)
+	return
+}
+
+// ListenPacketContext implements C.ProxyAdapter
+func (lb *LoadBalance) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (pc C.PacketConn, err error) {
+	defer func() {
+		if err == nil {
+			pc.AppendToChains(lb)
+		}
+	}()
+
+	proxy := lb.Unwrap(metadata)
+	return proxy.ListenPacketContext(ctx, metadata, lb.Base.DialOptions(opts...)...)
+}
+
+// SupportUDP implements C.ProxyAdapter
+func (lb *LoadBalance) SupportUDP() bool {
+	return !lb.disableUDP
+}
+
+func strategyRoundRobin() strategyFn {
+	idx := 0
+	return func(proxies []C.Proxy, metadata *C.Metadata) C.Proxy {
+		length := len(proxies)
+		for i := 0; i < length; i++ {
+			idx = (idx + 1) % length
+			proxy := proxies[idx]
+			if proxy.Alive() {
+				return proxy
+			}
+		}
+
+		return proxies[0]
+	}
+}
+
+func strategyConsistentHashing() strategyFn {
+	maxRetry := 5
+	return func(proxies []C.Proxy, metadata *C.Metadata) C.Proxy {
+		key := uint64(murmur3.Sum32([]byte(getKey(metadata))))
+		buckets := int32(len(proxies))
+		for i := 0; i < maxRetry; i, key = i+1, key+1 {
+			idx := jumpHash(key, buckets)
+			proxy := proxies[idx]
+			if proxy.Alive() {
+				return proxy
+			}
+		}
+
+		return proxies[0]
+	}
+}
+
+// Unwrap implements C.ProxyAdapter
+func (lb *LoadBalance) Unwrap(metadata *C.Metadata) C.Proxy {
+	proxies := lb.proxies(true)
+	return lb.strategyFn(proxies, metadata)
+}
+
+func (lb *LoadBalance) proxies(touch bool) []C.Proxy {
+	elm, _, _ := lb.single.Do(func() ([]C.Proxy, error) {
+		return getProvidersProxies(lb.providers, touch), nil
+	})
+
+	return elm
+}
+
+// MarshalJSON implements C.ProxyAdapter
+func (lb *LoadBalance) MarshalJSON() ([]byte, error) {
+	var all []string
+	for _, proxy := range lb.proxies(false) {
+		all = append(all, proxy.Name())
+	}
+	return json.Marshal(map[string]any{
+		"type": lb.Type().String(),
+		"all":  all,
+	})
+}
+
+func NewLoadBalance(option *GroupCommonOption, providers []provider.ProxyProvider, strategy string) (lb *LoadBalance, err error) {
+	var strategyFn strategyFn
+	switch strategy {
+	case "consistent-hashing":
+		strategyFn = strategyConsistentHashing()
+	case "round-robin":
+		strategyFn = strategyRoundRobin()
+	default:
+		return nil, fmt.Errorf("%w: %s", errStrategy, strategy)
+	}
+	return &LoadBalance{
+		Base: outbound.NewBase(outbound.BaseOption{
+			Name:        option.Name,
+			Type:        C.LoadBalance,
+			Interface:   option.Interface,
+			RoutingMark: option.RoutingMark,
+		}),
+		single:     singledo.NewSingle[[]C.Proxy](defaultGetProxiesDuration),
+		providers:  providers,
+		strategyFn: strategyFn,
+		disableUDP: option.DisableUDP,
+	}, nil
+}

adapter/outboundgroup/parser.go

@@ -0,0 +1,147 @@
+package outboundgroup
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/Dreamacro/clash/adapter/outbound"
+	"github.com/Dreamacro/clash/adapter/provider"
+	"github.com/Dreamacro/clash/common/structure"
+	C "github.com/Dreamacro/clash/constant"
+	types "github.com/Dreamacro/clash/constant/provider"
+)
+
+var (
+	errFormat            = errors.New("format error")
+	errType              = errors.New("unsupport type")
+	errMissProxy         = errors.New("`use` or `proxies` missing")
+	errMissHealthCheck   = errors.New("`url` or `interval` missing")
+	errDuplicateProvider = errors.New("duplicate provider name")
+)
+
+type GroupCommonOption struct {
+	outbound.BasicOption
+	Name       string   `group:"name"`
+	Type       string   `group:"type"`
+	Proxies    []string `group:"proxies,omitempty"`
+	Use        []string `group:"use,omitempty"`
+	URL        string   `group:"url,omitempty"`
+	Interval   int      `group:"interval,omitempty"`
+	Lazy       bool     `group:"lazy,omitempty"`
+	DisableUDP bool     `group:"disable-udp,omitempty"`
+}
+
+func ParseProxyGroup(config map[string]any, proxyMap map[string]C.Proxy, providersMap map[string]types.ProxyProvider) (C.ProxyAdapter, error) {
+	decoder := structure.NewDecoder(structure.Option{TagName: "group", WeaklyTypedInput: true})
+
+	groupOption := &GroupCommonOption{
+		Lazy: true,
+	}
+	if err := decoder.Decode(config, groupOption); err != nil {
+		return nil, errFormat
+	}
+
+	if groupOption.Type == "" || groupOption.Name == "" {
+		return nil, errFormat
+	}
+
+	groupName := groupOption.Name
+
+	providers := []types.ProxyProvider{}
+
+	if len(groupOption.Proxies) == 0 && len(groupOption.Use) == 0 {
+		return nil, errMissProxy
+	}
+
+	if len(groupOption.Proxies) != 0 {
+		ps, err := getProxies(proxyMap, groupOption.Proxies)
+		if err != nil {
+			return nil, err
+		}
+
+		if _, ok := providersMap[groupName]; ok {
+			return nil, errDuplicateProvider
+		}
+
+		// select don't need health check
+		if groupOption.Type == "select" || groupOption.Type == "relay" {
+			hc := provider.NewHealthCheck(ps, "", 0, true)
+			pd, err := provider.NewCompatibleProvider(groupName, ps, hc)
+			if err != nil {
+				return nil, err
+			}
+
+			providers = append(providers, pd)
+			providersMap[groupName] = pd
+		} else {
+			if groupOption.URL == "" || groupOption.Interval == 0 {
+				return nil, errMissHealthCheck
+			}
+
+			hc := provider.NewHealthCheck(ps, groupOption.URL, uint(groupOption.Interval), groupOption.Lazy)
+			pd, err := provider.NewCompatibleProvider(groupName, ps, hc)
+			if err != nil {
+				return nil, err
+			}
+
+			providers = append(providers, pd)
+			providersMap[groupName] = pd
+		}
+	}
+
+	if len(groupOption.Use) != 0 {
+		list, err := getProviders(providersMap, groupOption.Use)
+		if err != nil {
+			return nil, err
+		}
+		providers = append(providers, list...)
+	}
+
+	var group C.ProxyAdapter
+	switch groupOption.Type {
+	case "url-test":
+		opts := parseURLTestOption(config)
+		group = NewURLTest(groupOption, providers, opts...)
+	case "select":
+		group = NewSelector(groupOption, providers)
+	case "fallback":
+		group = NewFallback(groupOption, providers)
+	case "load-balance":
+		strategy := parseStrategy(config)
+		return NewLoadBalance(groupOption, providers, strategy)
+	case "relay":
+		group = NewRelay(groupOption, providers)
+	default:
+		return nil, fmt.Errorf("%w: %s", errType, groupOption.Type)
+	}
+
+	return group, nil
+}
+
+func getProxies(mapping map[string]C.Proxy, list []string) ([]C.Proxy, error) {
+	var ps []C.Proxy
+	for _, name := range list {
+		p, ok := mapping[name]
+		if !ok {
+			return nil, fmt.Errorf("'%s' not found", name)
+		}
+		ps = append(ps, p)
+	}
+	return ps, nil
+}
+
+func getProviders(mapping map[string]types.ProxyProvider, list []string) ([]types.ProxyProvider, error) {
+	var ps []types.ProxyProvider
+	for _, name := range list {
+		p, ok := mapping[name]
+		if !ok {
+			return nil, fmt.Errorf("'%s' not found", name)
+		}
+
+		if p.VehicleType() == types.Compatible {
+			return nil, fmt.Errorf("proxy group %s can't contains in `use`", name)
+		}
+		ps = append(ps, p)
+	}
+	return ps, nil
+}

adapter/outboundgroup/relay.go

@@ -0,0 +1,114 @@
+package outboundgroup
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"github.com/Dreamacro/clash/adapter/outbound"
+	"github.com/Dreamacro/clash/common/singledo"
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/constant/provider"
+)
+
+type Relay struct {
+	*outbound.Base
+	single    *singledo.Single[[]C.Proxy]
+	providers []provider.ProxyProvider
+}
+
+// DialContext implements C.ProxyAdapter
+func (r *Relay) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
+	var proxies []C.Proxy
+	for _, proxy := range r.proxies(metadata, true) {
+		if proxy.Type() != C.Direct {
+			proxies = append(proxies, proxy)
+		}
+	}
+
+	switch len(proxies) {
+	case 0:
+		return outbound.NewDirect().DialContext(ctx, metadata, r.Base.DialOptions(opts...)...)
+	case 1:
+		return proxies[0].DialContext(ctx, metadata, r.Base.DialOptions(opts...)...)
+	}
+
+	first := proxies[0]
+	last := proxies[len(proxies)-1]
+
+	c, err := dialer.DialContext(ctx, "tcp", first.Addr(), r.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %w", first.Addr(), err)
+	}
+	tcpKeepAlive(c)
+
+	var currentMeta *C.Metadata
+	for _, proxy := range proxies[1:] {
+		currentMeta, err = addrToMetadata(proxy.Addr())
+		if err != nil {
+			return nil, err
+		}
+
+		c, err = first.StreamConn(c, currentMeta)
+		if err != nil {
+			return nil, fmt.Errorf("%s connect error: %w", first.Addr(), err)
+		}
+
+		first = proxy
+	}
+
+	c, err = last.StreamConn(c, metadata)
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %w", last.Addr(), err)
+	}
+
+	return outbound.NewConn(c, r), nil
+}
+
+// MarshalJSON implements C.ProxyAdapter
+func (r *Relay) MarshalJSON() ([]byte, error) {
+	var all []string
+	for _, proxy := range r.rawProxies(false) {
+		all = append(all, proxy.Name())
+	}
+	return json.Marshal(map[string]any{
+		"type": r.Type().String(),
+		"all":  all,
+	})
+}
+
+func (r *Relay) rawProxies(touch bool) []C.Proxy {
+	elm, _, _ := r.single.Do(func() ([]C.Proxy, error) {
+		return getProvidersProxies(r.providers, touch), nil
+	})
+
+	return elm
+}
+
+func (r *Relay) proxies(metadata *C.Metadata, touch bool) []C.Proxy {
+	proxies := r.rawProxies(touch)
+
+	for n, proxy := range proxies {
+		subproxy := proxy.Unwrap(metadata)
+		for subproxy != nil {
+			proxies[n] = subproxy
+			subproxy = subproxy.Unwrap(metadata)
+		}
+	}
+
+	return proxies
+}
+
+func NewRelay(option *GroupCommonOption, providers []provider.ProxyProvider) *Relay {
+	return &Relay{
+		Base: outbound.NewBase(outbound.BaseOption{
+			Name:        option.Name,
+			Type:        C.Relay,
+			Interface:   option.Interface,
+			RoutingMark: option.RoutingMark,
+		}),
+		single:    singledo.NewSingle[[]C.Proxy](defaultGetProxiesDuration),
+		providers: providers,
+	}
+}

adapter/outboundgroup/selector.go

@@ -0,0 +1,114 @@
+package outboundgroup
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+
+	"github.com/Dreamacro/clash/adapter/outbound"
+	"github.com/Dreamacro/clash/common/singledo"
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/constant/provider"
+)
+
+type Selector struct {
+	*outbound.Base
+	disableUDP bool
+	single     *singledo.Single[C.Proxy]
+	selected   string
+	providers  []provider.ProxyProvider
+}
+
+// DialContext implements C.ProxyAdapter
+func (s *Selector) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
+	c, err := s.selectedProxy(true).DialContext(ctx, metadata, s.Base.DialOptions(opts...)...)
+	if err == nil {
+		c.AppendToChains(s)
+	}
+	return c, err
+}
+
+// ListenPacketContext implements C.ProxyAdapter
+func (s *Selector) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
+	pc, err := s.selectedProxy(true).ListenPacketContext(ctx, metadata, s.Base.DialOptions(opts...)...)
+	if err == nil {
+		pc.AppendToChains(s)
+	}
+	return pc, err
+}
+
+// SupportUDP implements C.ProxyAdapter
+func (s *Selector) SupportUDP() bool {
+	if s.disableUDP {
+		return false
+	}
+
+	return s.selectedProxy(false).SupportUDP()
+}
+
+// MarshalJSON implements C.ProxyAdapter
+func (s *Selector) MarshalJSON() ([]byte, error) {
+	var all []string
+	for _, proxy := range getProvidersProxies(s.providers, false) {
+		all = append(all, proxy.Name())
+	}
+
+	return json.Marshal(map[string]any{
+		"type": s.Type().String(),
+		"now":  s.Now(),
+		"all":  all,
+	})
+}
+
+func (s *Selector) Now() string {
+	return s.selectedProxy(false).Name()
+}
+
+func (s *Selector) Set(name string) error {
+	for _, proxy := range getProvidersProxies(s.providers, false) {
+		if proxy.Name() == name {
+			s.selected = name
+			s.single.Reset()
+			return nil
+		}
+	}
+
+	return errors.New("proxy not exist")
+}
+
+// Unwrap implements C.ProxyAdapter
+func (s *Selector) Unwrap(metadata *C.Metadata) C.Proxy {
+	return s.selectedProxy(true)
+}
+
+func (s *Selector) selectedProxy(touch bool) C.Proxy {
+	elm, _, _ := s.single.Do(func() (C.Proxy, error) {
+		proxies := getProvidersProxies(s.providers, touch)
+		for _, proxy := range proxies {
+			if proxy.Name() == s.selected {
+				return proxy, nil
+			}
+		}
+
+		return proxies[0], nil
+	})
+
+	return elm
+}
+
+func NewSelector(option *GroupCommonOption, providers []provider.ProxyProvider) *Selector {
+	selected := providers[0].Proxies()[0].Name()
+	return &Selector{
+		Base: outbound.NewBase(outbound.BaseOption{
+			Name:        option.Name,
+			Type:        C.Selector,
+			Interface:   option.Interface,
+			RoutingMark: option.RoutingMark,
+		}),
+		single:     singledo.NewSingle[C.Proxy](defaultGetProxiesDuration),
+		providers:  providers,
+		selected:   selected,
+		disableUDP: option.DisableUDP,
+	}
+}

adapter/outboundgroup/urltest.go

@@ -0,0 +1,156 @@
+package outboundgroup
+
+import (
+	"context"
+	"encoding/json"
+	"time"
+
+	"github.com/Dreamacro/clash/adapter/outbound"
+	"github.com/Dreamacro/clash/common/singledo"
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/constant/provider"
+)
+
+type urlTestOption func(*URLTest)
+
+func urlTestWithTolerance(tolerance uint16) urlTestOption {
+	return func(u *URLTest) {
+		u.tolerance = tolerance
+	}
+}
+
+type URLTest struct {
+	*outbound.Base
+	tolerance  uint16
+	disableUDP bool
+	fastNode   C.Proxy
+	single     *singledo.Single[[]C.Proxy]
+	fastSingle *singledo.Single[C.Proxy]
+	providers  []provider.ProxyProvider
+}
+
+func (u *URLTest) Now() string {
+	return u.fast(false).Name()
+}
+
+// DialContext implements C.ProxyAdapter
+func (u *URLTest) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (c C.Conn, err error) {
+	c, err = u.fast(true).DialContext(ctx, metadata, u.Base.DialOptions(opts...)...)
+	if err == nil {
+		c.AppendToChains(u)
+	}
+	return c, err
+}
+
+// ListenPacketContext implements C.ProxyAdapter
+func (u *URLTest) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
+	pc, err := u.fast(true).ListenPacketContext(ctx, metadata, u.Base.DialOptions(opts...)...)
+	if err == nil {
+		pc.AppendToChains(u)
+	}
+	return pc, err
+}
+
+// Unwrap implements C.ProxyAdapter
+func (u *URLTest) Unwrap(metadata *C.Metadata) C.Proxy {
+	return u.fast(true)
+}
+
+func (u *URLTest) proxies(touch bool) []C.Proxy {
+	elm, _, _ := u.single.Do(func() ([]C.Proxy, error) {
+		return getProvidersProxies(u.providers, touch), nil
+	})
+
+	return elm
+}
+
+func (u *URLTest) fast(touch bool) C.Proxy {
+	elm, _, _ := u.fastSingle.Do(func() (C.Proxy, error) {
+		proxies := u.proxies(touch)
+		fast := proxies[0]
+		min := fast.LastDelay()
+		fastNotExist := true
+
+		for _, proxy := range proxies[1:] {
+			if u.fastNode != nil && proxy.Name() == u.fastNode.Name() {
+				fastNotExist = false
+			}
+
+			if !proxy.Alive() {
+				continue
+			}
+
+			delay := proxy.LastDelay()
+			if delay < min {
+				fast = proxy
+				min = delay
+			}
+		}
+
+		// tolerance
+		if u.fastNode == nil || fastNotExist || !u.fastNode.Alive() || u.fastNode.LastDelay() > fast.LastDelay()+u.tolerance {
+			u.fastNode = fast
+		}
+
+		return u.fastNode, nil
+	})
+
+	return elm
+}
+
+// SupportUDP implements C.ProxyAdapter
+func (u *URLTest) SupportUDP() bool {
+	if u.disableUDP {
+		return false
+	}
+
+	return u.fast(false).SupportUDP()
+}
+
+// MarshalJSON implements C.ProxyAdapter
+func (u *URLTest) MarshalJSON() ([]byte, error) {
+	var all []string
+	for _, proxy := range u.proxies(false) {
+		all = append(all, proxy.Name())
+	}
+	return json.Marshal(map[string]any{
+		"type": u.Type().String(),
+		"now":  u.Now(),
+		"all":  all,
+	})
+}
+
+func parseURLTestOption(config map[string]any) []urlTestOption {
+	opts := []urlTestOption{}
+
+	// tolerance
+	if elm, ok := config["tolerance"]; ok {
+		if tolerance, ok := elm.(int); ok {
+			opts = append(opts, urlTestWithTolerance(uint16(tolerance)))
+		}
+	}
+
+	return opts
+}
+
+func NewURLTest(option *GroupCommonOption, providers []provider.ProxyProvider, options ...urlTestOption) *URLTest {
+	urlTest := &URLTest{
+		Base: outbound.NewBase(outbound.BaseOption{
+			Name:        option.Name,
+			Type:        C.URLTest,
+			Interface:   option.Interface,
+			RoutingMark: option.RoutingMark,
+		}),
+		single:     singledo.NewSingle[[]C.Proxy](defaultGetProxiesDuration),
+		fastSingle: singledo.NewSingle[C.Proxy](time.Second * 10),
+		providers:  providers,
+		disableUDP: option.DisableUDP,
+	}
+
+	for _, option := range options {
+		option(urlTest)
+	}
+
+	return urlTest
+}

adapter/outboundgroup/util.go

@@ -0,0 +1,52 @@
+package outboundgroup
+
+import (
+	"fmt"
+	"net"
+	"net/netip"
+	"time"
+
+	C "github.com/Dreamacro/clash/constant"
+)
+
+func addrToMetadata(rawAddress string) (addr *C.Metadata, err error) {
+	host, port, err := net.SplitHostPort(rawAddress)
+	if err != nil {
+		err = fmt.Errorf("addrToMetadata failed: %w", err)
+		return
+	}
+
+	ip, err := netip.ParseAddr(host)
+	if err != nil {
+		addr = &C.Metadata{
+			AddrType: C.AtypDomainName,
+			Host:     host,
+			DstIP:    netip.Addr{},
+			DstPort:  port,
+		}
+		return
+	} else if ip.Is4() {
+		addr = &C.Metadata{
+			AddrType: C.AtypIPv4,
+			Host:     "",
+			DstIP:    ip,
+			DstPort:  port,
+		}
+		return
+	}
+
+	addr = &C.Metadata{
+		AddrType: C.AtypIPv6,
+		Host:     "",
+		DstIP:    ip,
+		DstPort:  port,
+	}
+	return
+}
+
+func tcpKeepAlive(c net.Conn) {
+	if tcp, ok := c.(*net.TCPConn); ok {
+		_ = tcp.SetKeepAlive(true)
+		_ = tcp.SetKeepAlivePeriod(30 * time.Second)
+	}
+}

adapter/parser.go

@@ -0,0 +1,93 @@
+package adapter
+
+import (
+	"fmt"
+
+	"github.com/Dreamacro/clash/adapter/outbound"
+	"github.com/Dreamacro/clash/common/structure"
+	C "github.com/Dreamacro/clash/constant"
+)
+
+func ParseProxy(mapping map[string]any) (C.Proxy, error) {
+	decoder := structure.NewDecoder(structure.Option{TagName: "proxy", WeaklyTypedInput: true})
+	proxyType, existType := mapping["type"].(string)
+	if !existType {
+		return nil, fmt.Errorf("missing type")
+	}
+
+	var (
+		proxy C.ProxyAdapter
+		err   error
+	)
+	switch proxyType {
+	case "ss":
+		ssOption := &outbound.ShadowSocksOption{}
+		err = decoder.Decode(mapping, ssOption)
+		if err != nil {
+			break
+		}
+		proxy, err = outbound.NewShadowSocks(*ssOption)
+	case "ssr":
+		ssrOption := &outbound.ShadowSocksROption{}
+		err = decoder.Decode(mapping, ssrOption)
+		if err != nil {
+			break
+		}
+		proxy, err = outbound.NewShadowSocksR(*ssrOption)
+	case "socks5":
+		socksOption := &outbound.Socks5Option{}
+		err = decoder.Decode(mapping, socksOption)
+		if err != nil {
+			break
+		}
+		proxy = outbound.NewSocks5(*socksOption)
+	case "http":
+		httpOption := &outbound.HttpOption{}
+		err = decoder.Decode(mapping, httpOption)
+		if err != nil {
+			break
+		}
+		proxy = outbound.NewHttp(*httpOption)
+	case "vmess":
+		vmessOption := &outbound.VmessOption{
+			HTTPOpts: outbound.HTTPOptions{
+				Method: "GET",
+				Path:   []string{"/"},
+			},
+		}
+		err = decoder.Decode(mapping, vmessOption)
+		if err != nil {
+			break
+		}
+		proxy, err = outbound.NewVmess(*vmessOption)
+	case "vless":
+		vlessOption := &outbound.VlessOption{}
+		err = decoder.Decode(mapping, vlessOption)
+		if err != nil {
+			break
+		}
+		proxy, err = outbound.NewVless(*vlessOption)
+	case "snell":
+		snellOption := &outbound.SnellOption{}
+		err = decoder.Decode(mapping, snellOption)
+		if err != nil {
+			break
+		}
+		proxy, err = outbound.NewSnell(*snellOption)
+	case "trojan":
+		trojanOption := &outbound.TrojanOption{}
+		err = decoder.Decode(mapping, trojanOption)
+		if err != nil {
+			break
+		}
+		proxy, err = outbound.NewTrojan(*trojanOption)
+	default:
+		return nil, fmt.Errorf("unsupport proxy type: %s", proxyType)
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	return NewProxy(proxy), nil
+}

adapter/provider/fetcher.go

@@ -0,0 +1,185 @@
+package provider
+
+import (
+	"bytes"
+	"crypto/md5"
+	"os"
+	"path/filepath"
+	"time"
+
+	types "github.com/Dreamacro/clash/constant/provider"
+	"github.com/Dreamacro/clash/log"
+)
+
+var (
+	fileMode os.FileMode = 0o666
+	dirMode  os.FileMode = 0o755
+)
+
+type parser = func([]byte) (any, error)
+
+type fetcher struct {
+	name      string
+	vehicle   types.Vehicle
+	updatedAt *time.Time
+	ticker    *time.Ticker
+	done      chan struct{}
+	hash      [16]byte
+	parser    parser
+	onUpdate  func(any)
+}
+
+func (f *fetcher) Name() string {
+	return f.name
+}
+
+func (f *fetcher) VehicleType() types.VehicleType {
+	return f.vehicle.Type()
+}
+
+func (f *fetcher) Initial() (any, error) {
+	var (
+		buf     []byte
+		err     error
+		isLocal bool
+	)
+	if stat, fErr := os.Stat(f.vehicle.Path()); fErr == nil {
+		buf, err = os.ReadFile(f.vehicle.Path())
+		modTime := stat.ModTime()
+		f.updatedAt = &modTime
+		isLocal = true
+	} else {
+		buf, err = f.vehicle.Read()
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	proxies, err := f.parser(buf)
+	if err != nil {
+		if !isLocal {
+			return nil, err
+		}
+
+		// parse local file error, fallback to remote
+		buf, err = f.vehicle.Read()
+		if err != nil {
+			return nil, err
+		}
+
+		proxies, err = f.parser(buf)
+		if err != nil {
+			return nil, err
+		}
+
+		isLocal = false
+	}
+
+	if f.vehicle.Type() != types.File && !isLocal {
+		if err := safeWrite(f.vehicle.Path(), buf); err != nil {
+			return nil, err
+		}
+	}
+
+	f.hash = md5.Sum(buf)
+
+	// pull proxies automatically
+	if f.ticker != nil {
+		go f.pullLoop()
+	}
+
+	return proxies, nil
+}
+
+func (f *fetcher) Update() (any, bool, error) {
+	buf, err := f.vehicle.Read()
+	if err != nil {
+		return nil, false, err
+	}
+
+	now := time.Now()
+	hash := md5.Sum(buf)
+	if bytes.Equal(f.hash[:], hash[:]) {
+		f.updatedAt = &now
+		os.Chtimes(f.vehicle.Path(), now, now)
+		return nil, true, nil
+	}
+
+	proxies, err := f.parser(buf)
+	if err != nil {
+		return nil, false, err
+	}
+
+	if f.vehicle.Type() != types.File {
+		if err := safeWrite(f.vehicle.Path(), buf); err != nil {
+			return nil, false, err
+		}
+	}
+
+	f.updatedAt = &now
+	f.hash = hash
+
+	return proxies, false, nil
+}
+
+func (f *fetcher) Destroy() error {
+	if f.ticker != nil {
+		f.done <- struct{}{}
+	}
+	return nil
+}
+
+func (f *fetcher) pullLoop() {
+	for {
+		select {
+		case <-f.ticker.C:
+			elm, same, err := f.Update()
+			if err != nil {
+				log.Warnln("[Provider] %s pull error: %s", f.Name(), err.Error())
+				continue
+			}
+
+			if same {
+				log.Debugln("[Provider] %s's proxies doesn't change", f.Name())
+				continue
+			}
+
+			log.Infoln("[Provider] %s's proxies update", f.Name())
+			if f.onUpdate != nil {
+				f.onUpdate(elm)
+			}
+		case <-f.done:
+			f.ticker.Stop()
+			return
+		}
+	}
+}
+
+func safeWrite(path string, buf []byte) error {
+	dir := filepath.Dir(path)
+
+	if _, err := os.Stat(dir); os.IsNotExist(err) {
+		if err := os.MkdirAll(dir, dirMode); err != nil {
+			return err
+		}
+	}
+
+	return os.WriteFile(path, buf, fileMode)
+}
+
+func newFetcher(name string, interval time.Duration, vehicle types.Vehicle, parser parser, onUpdate func(any)) *fetcher {
+	var ticker *time.Ticker
+	if interval != 0 {
+		ticker = time.NewTicker(interval)
+	}
+
+	return &fetcher{
+		name:     name,
+		ticker:   ticker,
+		vehicle:  vehicle,
+		parser:   parser,
+		done:     make(chan struct{}, 1),
+		onUpdate: onUpdate,
+	}
+}

adapter/provider/healthcheck.go

@@ -0,0 +1,94 @@
+package provider
+
+import (
+	"context"
+	"time"
+
+	"github.com/Dreamacro/clash/common/batch"
+	C "github.com/Dreamacro/clash/constant"
+
+	"go.uber.org/atomic"
+)
+
+const (
+	defaultURLTestTimeout = time.Second * 5
+)
+
+type HealthCheckOption struct {
+	URL      string
+	Interval uint
+}
+
+type HealthCheck struct {
+	url       string
+	proxies   []C.Proxy
+	interval  uint
+	lazy      bool
+	lastTouch *atomic.Int64
+	done      chan struct{}
+}
+
+func (hc *HealthCheck) process() {
+	ticker := time.NewTicker(time.Duration(hc.interval) * time.Second)
+
+	go func() {
+		t := time.NewTicker(30 * time.Second)
+		<-t.C
+		t.Stop()
+		hc.check()
+	}()
+
+	for {
+		select {
+		case <-ticker.C:
+			now := time.Now().Unix()
+			if !hc.lazy || now-hc.lastTouch.Load() < int64(hc.interval) {
+				hc.check()
+			}
+		case <-hc.done:
+			ticker.Stop()
+			return
+		}
+	}
+}
+
+func (hc *HealthCheck) setProxy(proxies []C.Proxy) {
+	hc.proxies = proxies
+}
+
+func (hc *HealthCheck) auto() bool {
+	return hc.interval != 0
+}
+
+func (hc *HealthCheck) touch() {
+	hc.lastTouch.Store(time.Now().Unix())
+}
+
+func (hc *HealthCheck) check() {
+	b, _ := batch.New[bool](context.Background(), batch.WithConcurrencyNum[bool](10))
+	for _, proxy := range hc.proxies {
+		p := proxy
+		b.Go(p.Name(), func() (bool, error) {
+			ctx, cancel := context.WithTimeout(context.Background(), defaultURLTestTimeout)
+			defer cancel()
+			_, _ = p.URLTest(ctx, hc.url)
+			return false, nil
+		})
+	}
+	b.Wait()
+}
+
+func (hc *HealthCheck) close() {
+	hc.done <- struct{}{}
+}
+
+func NewHealthCheck(proxies []C.Proxy, url string, interval uint, lazy bool) *HealthCheck {
+	return &HealthCheck{
+		proxies:   proxies,
+		url:       url,
+		interval:  interval,
+		lazy:      lazy,
+		lastTouch: atomic.NewInt64(0),
+		done:      make(chan struct{}, 1),
+	}
+}

adapter/provider/parser.go

@@ -0,0 +1,64 @@
+package provider
+
+import (
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/Dreamacro/clash/common/structure"
+	C "github.com/Dreamacro/clash/constant"
+	types "github.com/Dreamacro/clash/constant/provider"
+)
+
+var errVehicleType = errors.New("unsupport vehicle type")
+
+type healthCheckSchema struct {
+	Enable   bool   `provider:"enable"`
+	URL      string `provider:"url"`
+	Interval int    `provider:"interval"`
+	Lazy     bool   `provider:"lazy,omitempty"`
+}
+
+type proxyProviderSchema struct {
+	Type        string            `provider:"type"`
+	Path        string            `provider:"path"`
+	URL         string            `provider:"url,omitempty"`
+	Interval    int               `provider:"interval,omitempty"`
+	Filter      string            `provider:"filter,omitempty"`
+	HealthCheck healthCheckSchema `provider:"health-check,omitempty"`
+}
+
+func ParseProxyProvider(name string, mapping map[string]any) (types.ProxyProvider, error) {
+	decoder := structure.NewDecoder(structure.Option{TagName: "provider", WeaklyTypedInput: true})
+
+	schema := &proxyProviderSchema{
+		HealthCheck: healthCheckSchema{
+			Lazy: true,
+		},
+	}
+	if err := decoder.Decode(mapping, schema); err != nil {
+		return nil, err
+	}
+
+	var hcInterval uint
+	if schema.HealthCheck.Enable {
+		hcInterval = uint(schema.HealthCheck.Interval)
+	}
+	hc := NewHealthCheck([]C.Proxy{}, schema.HealthCheck.URL, hcInterval, schema.HealthCheck.Lazy)
+
+	path := C.Path.Resolve(schema.Path)
+
+	var vehicle types.Vehicle
+	switch schema.Type {
+	case "file":
+		vehicle = NewFileVehicle(path)
+	case "http":
+		vehicle = NewHTTPVehicle(schema.URL, path)
+	default:
+		return nil, fmt.Errorf("%w: %s", errVehicleType, schema.Type)
+	}
+
+	interval := time.Duration(uint(schema.Interval)) * time.Second
+	filter := schema.Filter
+	return NewProxySetProvider(name, interval, filter, vehicle, hc)
+}

adapter/provider/provider.go

@@ -0,0 +1,235 @@
+package provider
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"regexp"
+	"runtime"
+	"time"
+
+	"github.com/Dreamacro/clash/adapter"
+	C "github.com/Dreamacro/clash/constant"
+	types "github.com/Dreamacro/clash/constant/provider"
+
+	"gopkg.in/yaml.v2"
+)
+
+const (
+	ReservedName = "default"
+)
+
+type ProxySchema struct {
+	Proxies []map[string]any `yaml:"proxies"`
+}
+
+// for auto gc
+type ProxySetProvider struct {
+	*proxySetProvider
+}
+
+type proxySetProvider struct {
+	*fetcher
+	proxies     []C.Proxy
+	healthCheck *HealthCheck
+}
+
+func (pp *proxySetProvider) MarshalJSON() ([]byte, error) {
+	return json.Marshal(map[string]any{
+		"name":        pp.Name(),
+		"type":        pp.Type().String(),
+		"vehicleType": pp.VehicleType().String(),
+		"proxies":     pp.Proxies(),
+		"updatedAt":   pp.updatedAt,
+	})
+}
+
+func (pp *proxySetProvider) Name() string {
+	return pp.name
+}
+
+func (pp *proxySetProvider) HealthCheck() {
+	pp.healthCheck.check()
+}
+
+func (pp *proxySetProvider) Update() error {
+	elm, same, err := pp.fetcher.Update()
+	if err == nil && !same {
+		pp.onUpdate(elm)
+	}
+	return err
+}
+
+func (pp *proxySetProvider) Initial() error {
+	elm, err := pp.fetcher.Initial()
+	if err != nil {
+		return err
+	}
+
+	pp.onUpdate(elm)
+	return nil
+}
+
+func (pp *proxySetProvider) Type() types.ProviderType {
+	return types.Proxy
+}
+
+func (pp *proxySetProvider) Proxies() []C.Proxy {
+	return pp.proxies
+}
+
+func (pp *proxySetProvider) ProxiesWithTouch() []C.Proxy {
+	pp.healthCheck.touch()
+	return pp.Proxies()
+}
+
+func (pp *proxySetProvider) setProxies(proxies []C.Proxy) {
+	pp.proxies = proxies
+	pp.healthCheck.setProxy(proxies)
+	if pp.healthCheck.auto() {
+		go pp.healthCheck.check()
+	}
+}
+
+func stopProxyProvider(pd *ProxySetProvider) {
+	pd.healthCheck.close()
+	pd.fetcher.Destroy()
+}
+
+func NewProxySetProvider(name string, interval time.Duration, filter string, vehicle types.Vehicle, hc *HealthCheck) (*ProxySetProvider, error) {
+	filterReg, err := regexp.Compile(filter)
+	if err != nil {
+		return nil, fmt.Errorf("invalid filter regex: %w", err)
+	}
+
+	if hc.auto() {
+		go hc.process()
+	}
+
+	pd := &proxySetProvider{
+		proxies:     []C.Proxy{},
+		healthCheck: hc,
+	}
+
+	onUpdate := func(elm any) {
+		ret := elm.([]C.Proxy)
+		pd.setProxies(ret)
+	}
+
+	proxiesParseAndFilter := func(buf []byte) (any, error) {
+		schema := &ProxySchema{}
+
+		if err := yaml.Unmarshal(buf, schema); err != nil {
+			return nil, err
+		}
+
+		if schema.Proxies == nil {
+			return nil, errors.New("file must have a `proxies` field")
+		}
+
+		proxies := []C.Proxy{}
+		for idx, mapping := range schema.Proxies {
+			if name, ok := mapping["name"]; ok && len(filter) > 0 && !filterReg.MatchString(name.(string)) {
+				continue
+			}
+			proxy, err := adapter.ParseProxy(mapping)
+			if err != nil {
+				return nil, fmt.Errorf("proxy %d error: %w", idx, err)
+			}
+			proxies = append(proxies, proxy)
+		}
+
+		if len(proxies) == 0 {
+			if len(filter) > 0 {
+				return nil, errors.New("doesn't match any proxy, please check your filter")
+			}
+			return nil, errors.New("file doesn't have any proxy")
+		}
+
+		return proxies, nil
+	}
+
+	fetcher := newFetcher(name, interval, vehicle, proxiesParseAndFilter, onUpdate)
+	pd.fetcher = fetcher
+
+	wrapper := &ProxySetProvider{pd}
+	runtime.SetFinalizer(wrapper, stopProxyProvider)
+	return wrapper, nil
+}
+
+// for auto gc
+type CompatibleProvider struct {
+	*compatibleProvider
+}
+
+type compatibleProvider struct {
+	name        string
+	healthCheck *HealthCheck
+	proxies     []C.Proxy
+}
+
+func (cp *compatibleProvider) MarshalJSON() ([]byte, error) {
+	return json.Marshal(map[string]any{
+		"name":        cp.Name(),
+		"type":        cp.Type().String(),
+		"vehicleType": cp.VehicleType().String(),
+		"proxies":     cp.Proxies(),
+	})
+}
+
+func (cp *compatibleProvider) Name() string {
+	return cp.name
+}
+
+func (cp *compatibleProvider) HealthCheck() {
+	cp.healthCheck.check()
+}
+
+func (cp *compatibleProvider) Update() error {
+	return nil
+}
+
+func (cp *compatibleProvider) Initial() error {
+	return nil
+}
+
+func (cp *compatibleProvider) VehicleType() types.VehicleType {
+	return types.Compatible
+}
+
+func (cp *compatibleProvider) Type() types.ProviderType {
+	return types.Proxy
+}
+
+func (cp *compatibleProvider) Proxies() []C.Proxy {
+	return cp.proxies
+}
+
+func (cp *compatibleProvider) ProxiesWithTouch() []C.Proxy {
+	cp.healthCheck.touch()
+	return cp.Proxies()
+}
+
+func stopCompatibleProvider(pd *CompatibleProvider) {
+	pd.healthCheck.close()
+}
+
+func NewCompatibleProvider(name string, proxies []C.Proxy, hc *HealthCheck) (*CompatibleProvider, error) {
+	if len(proxies) == 0 {
+		return nil, errors.New("provider need one proxy at least")
+	}
+
+	if hc.auto() {
+		go hc.process()
+	}
+
+	pd := &compatibleProvider{
+		name:        name,
+		proxies:     proxies,
+		healthCheck: hc,
+	}
+
+	wrapper := &CompatibleProvider{pd}
+	runtime.SetFinalizer(wrapper, stopCompatibleProvider)
+	return wrapper, nil
+}

adapter/provider/vehicle.go

@@ -0,0 +1,98 @@
+package provider
+
+import (
+	"context"
+	"io"
+	"net"
+	"net/http"
+	"net/url"
+	"os"
+	"time"
+
+	"github.com/Dreamacro/clash/component/dialer"
+	types "github.com/Dreamacro/clash/constant/provider"
+)
+
+type FileVehicle struct {
+	path string
+}
+
+func (f *FileVehicle) Type() types.VehicleType {
+	return types.File
+}
+
+func (f *FileVehicle) Path() string {
+	return f.path
+}
+
+func (f *FileVehicle) Read() ([]byte, error) {
+	return os.ReadFile(f.path)
+}
+
+func NewFileVehicle(path string) *FileVehicle {
+	return &FileVehicle{path: path}
+}
+
+type HTTPVehicle struct {
+	url  string
+	path string
+}
+
+func (h *HTTPVehicle) Type() types.VehicleType {
+	return types.HTTP
+}
+
+func (h *HTTPVehicle) Path() string {
+	return h.path
+}
+
+func (h *HTTPVehicle) Read() ([]byte, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*20)
+	defer cancel()
+
+	uri, err := url.Parse(h.url)
+	if err != nil {
+		return nil, err
+	}
+
+	req, err := http.NewRequest(http.MethodGet, uri.String(), nil)
+	if err != nil {
+		return nil, err
+	}
+
+	if user := uri.User; user != nil {
+		password, _ := user.Password()
+		req.SetBasicAuth(user.Username(), password)
+	}
+
+	req = req.WithContext(ctx)
+
+	transport := &http.Transport{
+		// from http.DefaultTransport
+		MaxIdleConns:          100,
+		IdleConnTimeout:       90 * time.Second,
+		TLSHandshakeTimeout:   10 * time.Second,
+		ExpectContinueTimeout: 1 * time.Second,
+		DialContext: func(ctx context.Context, network, address string) (net.Conn, error) {
+			return dialer.DialContext(ctx, network, address)
+		},
+	}
+
+	client := http.Client{Transport: transport}
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	buf, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	return buf, nil
+}
+
+func NewHTTPVehicle(url string, path string) *HTTPVehicle {
+	return &HTTPVehicle{url, path}
+}

adapters/inbound/http.go

@@ -1,59 +0,0 @@
-package adapters
-
-import (
-	"net"
-	"net/http"
-	"strings"
-
-	C "github.com/Dreamacro/clash/constant"
-)
-
-// HTTPAdapter is a adapter for HTTP connection
-type HTTPAdapter struct {
-	net.Conn
-	metadata *C.Metadata
-	R        *http.Request
-}
-
-// Metadata return destination metadata
-func (h *HTTPAdapter) Metadata() *C.Metadata {
-	return h.metadata
-}
-
-// NewHTTP is HTTPAdapter generator
-func NewHTTP(request *http.Request, conn net.Conn) *HTTPAdapter {
-	metadata := parseHTTPAddr(request)
-	if ip, port, err := parseAddr(conn.RemoteAddr().String()); err == nil {
-		metadata.SrcIP = ip
-		metadata.SrcPort = port
-	}
-	return &HTTPAdapter{
-		metadata: metadata,
-		R:        request,
-		Conn:     conn,
-	}
-}
-
-// RemoveHopByHopHeaders remove hop-by-hop header
-func RemoveHopByHopHeaders(header http.Header) {
-	// Strip hop-by-hop header based on RFC:
-	// http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.5.1
-	// https://www.mnot.net/blog/2011/07/11/what_proxies_must_do
-
-	header.Del("Proxy-Connection")
-	header.Del("Proxy-Authenticate")
-	header.Del("Proxy-Authorization")
-	header.Del("TE")
-	header.Del("Trailers")
-	header.Del("Transfer-Encoding")
-	header.Del("Upgrade")
-
-	connections := header.Get("Connection")
-	header.Del("Connection")
-	if len(connections) == 0 {
-		return
-	}
-	for _, h := range strings.Split(connections, ",") {
-		header.Del(strings.TrimSpace(h))
-	}
-}

adapters/inbound/https.go

@@ -1,19 +0,0 @@
-package adapters
-
-import (
-	"net"
-	"net/http"
-)
-
-// NewHTTPS is HTTPAdapter generator
-func NewHTTPS(request *http.Request, conn net.Conn) *SocketAdapter {
-	metadata := parseHTTPAddr(request)
-	if ip, port, err := parseAddr(conn.RemoteAddr().String()); err == nil {
-		metadata.SrcIP = ip
-		metadata.SrcPort = port
-	}
-	return &SocketAdapter{
-		metadata: metadata,
-		Conn:     conn,
-	}
-}

adapters/inbound/socket.go

@@ -1,35 +0,0 @@
-package adapters
-
-import (
-	"net"
-
-	"github.com/Dreamacro/clash/component/socks5"
-	C "github.com/Dreamacro/clash/constant"
-)
-
-// SocketAdapter is a adapter for socks and redir connection
-type SocketAdapter struct {
-	net.Conn
-	metadata *C.Metadata
-}
-
-// Metadata return destination metadata
-func (s *SocketAdapter) Metadata() *C.Metadata {
-	return s.metadata
-}
-
-// NewSocket is SocketAdapter generator
-func NewSocket(target socks5.Addr, conn net.Conn, source C.Type, netType C.NetWork) *SocketAdapter {
-	metadata := parseSocksAddr(target)
-	metadata.NetWork = netType
-	metadata.Type = source
-	if ip, port, err := parseAddr(conn.RemoteAddr().String()); err == nil {
-		metadata.SrcIP = ip
-		metadata.SrcPort = port
-	}
-
-	return &SocketAdapter{
-		Conn:     conn,
-		metadata: metadata,
-	}
-}

adapters/outbound/base.go

@@ -1,148 +0,0 @@
-package adapters
-
-import (
-	"encoding/json"
-	"errors"
-	"net"
-	"net/http"
-	"time"
-
-	"github.com/Dreamacro/clash/common/queue"
-	C "github.com/Dreamacro/clash/constant"
-)
-
-type Base struct {
-	name string
-	tp   C.AdapterType
-	udp  bool
-}
-
-func (b *Base) Name() string {
-	return b.name
-}
-
-func (b *Base) Type() C.AdapterType {
-	return b.tp
-}
-
-func (b *Base) DialUDP(metadata *C.Metadata) (net.PacketConn, net.Addr, error) {
-	return nil, nil, errors.New("no support")
-}
-
-func (b *Base) SupportUDP() bool {
-	return b.udp
-}
-
-func (b *Base) Destroy() {}
-
-func (b *Base) MarshalJSON() ([]byte, error) {
-	return json.Marshal(map[string]string{
-		"type": b.Type().String(),
-	})
-}
-
-type Proxy struct {
-	C.ProxyAdapter
-	history *queue.Queue
-	alive   bool
-}
-
-func (p *Proxy) Alive() bool {
-	return p.alive
-}
-
-func (p *Proxy) Dial(metadata *C.Metadata) (net.Conn, error) {
-	conn, err := p.ProxyAdapter.Dial(metadata)
-	if err != nil {
-		p.alive = false
-	}
-	return conn, err
-}
-
-func (p *Proxy) DelayHistory() []C.DelayHistory {
-	queue := p.history.Copy()
-	histories := []C.DelayHistory{}
-	for _, item := range queue {
-		histories = append(histories, item.(C.DelayHistory))
-	}
-	return histories
-}
-
-// LastDelay return last history record. if proxy is not alive, return the max value of int16.
-func (p *Proxy) LastDelay() (delay uint16) {
-	var max uint16 = 0xffff
-	if !p.alive {
-		return max
-	}
-
-	head := p.history.First()
-	if head == nil {
-		return max
-	}
-	history := head.(C.DelayHistory)
-	if history.Delay == 0 {
-		return max
-	}
-	return history.Delay
-}
-
-func (p *Proxy) MarshalJSON() ([]byte, error) {
-	inner, err := p.ProxyAdapter.MarshalJSON()
-	if err != nil {
-		return inner, err
-	}
-
-	mapping := map[string]interface{}{}
-	json.Unmarshal(inner, &mapping)
-	mapping["history"] = p.DelayHistory()
-	return json.Marshal(mapping)
-}
-
-// URLTest get the delay for the specified URL
-func (p *Proxy) URLTest(url string) (t uint16, err error) {
-	defer func() {
-		p.alive = err == nil
-		record := C.DelayHistory{Time: time.Now()}
-		if err == nil {
-			record.Delay = t
-		}
-		p.history.Put(record)
-		if p.history.Len() > 10 {
-			p.history.Pop()
-		}
-	}()
-
-	addr, err := urlToMetadata(url)
-	if err != nil {
-		return
-	}
-
-	start := time.Now()
-	instance, err := p.Dial(&addr)
-	if err != nil {
-		return
-	}
-	defer instance.Close()
-	transport := &http.Transport{
-		Dial: func(string, string) (net.Conn, error) {
-			return instance, nil
-		},
-		// from http.DefaultTransport
-		MaxIdleConns:          100,
-		IdleConnTimeout:       90 * time.Second,
-		TLSHandshakeTimeout:   10 * time.Second,
-		ExpectContinueTimeout: 1 * time.Second,
-	}
-	client := http.Client{Transport: transport}
-	resp, err := client.Get(url)
-	if err != nil {
-		return
-	}
-	resp.Body.Close()
-	t = uint16(time.Since(start) / time.Millisecond)
-	return
-}
-
-func NewProxy(adapter C.ProxyAdapter) *Proxy {
-	return &Proxy{adapter, queue.New(10), true}
-}

adapters/outbound/direct.go

@@ -1,48 +0,0 @@
-package adapters
-
-import (
-	"net"
-
-	C "github.com/Dreamacro/clash/constant"
-)
-
-type Direct struct {
-	*Base
-}
-
-func (d *Direct) Dial(metadata *C.Metadata) (net.Conn, error) {
-	address := net.JoinHostPort(metadata.Host, metadata.DstPort)
-	if metadata.DstIP != nil {
-		address = net.JoinHostPort(metadata.DstIP.String(), metadata.DstPort)
-	}
-
-	c, err := net.DialTimeout("tcp", address, tcpTimeout)
-	if err != nil {
-		return nil, err
-	}
-	tcpKeepAlive(c)
-	return c, nil
-}
-
-func (d *Direct) DialUDP(metadata *C.Metadata) (net.PacketConn, net.Addr, error) {
-	pc, err := net.ListenPacket("udp", "")
-	if err != nil {
-		return nil, nil, err
-	}
-
-	addr, err := net.ResolveUDPAddr("udp", net.JoinHostPort(metadata.String(), metadata.DstPort))
-	if err != nil {
-		return nil, nil, err
-	}
-	return pc, addr, nil
-}
-
-func NewDirect() *Direct {
-	return &Direct{
-		Base: &Base{
-			name: "DIRECT",
-			tp:   C.Direct,
-			udp:  true,
-		},
-	}
-}

adapters/outbound/fallback.go

@@ -1,125 +0,0 @@
-package adapters
-
-import (
-	"encoding/json"
-	"errors"
-	"net"
-	"sync"
-	"time"
-
-	C "github.com/Dreamacro/clash/constant"
-)
-
-type Fallback struct {
-	*Base
-	proxies  []C.Proxy
-	rawURL   string
-	interval time.Duration
-	done     chan struct{}
-}
-
-type FallbackOption struct {
-	Name     string   `proxy:"name"`
-	Proxies  []string `proxy:"proxies"`
-	URL      string   `proxy:"url"`
-	Interval int      `proxy:"interval"`
-}
-
-func (f *Fallback) Now() string {
-	proxy := f.findAliveProxy()
-	return proxy.Name()
-}
-
-func (f *Fallback) Dial(metadata *C.Metadata) (net.Conn, error) {
-	proxy := f.findAliveProxy()
-	return proxy.Dial(metadata)
-}
-
-func (f *Fallback) DialUDP(metadata *C.Metadata) (net.PacketConn, net.Addr, error) {
-	proxy := f.findAliveProxy()
-	return proxy.DialUDP(metadata)
-}
-
-func (f *Fallback) SupportUDP() bool {
-	proxy := f.findAliveProxy()
-	return proxy.SupportUDP()
-}
-
-func (f *Fallback) MarshalJSON() ([]byte, error) {
-	var all []string
-	for _, proxy := range f.proxies {
-		all = append(all, proxy.Name())
-	}
-	return json.Marshal(map[string]interface{}{
-		"type": f.Type().String(),
-		"now":  f.Now(),
-		"all":  all,
-	})
-}
-
-func (f *Fallback) Destroy() {
-	f.done <- struct{}{}
-}
-
-func (f *Fallback) loop() {
-	tick := time.NewTicker(f.interval)
-	go f.validTest()
-Loop:
-	for {
-		select {
-		case <-tick.C:
-			go f.validTest()
-		case <-f.done:
-			break Loop
-		}
-	}
-}
-
-func (f *Fallback) findAliveProxy() C.Proxy {
-	for _, proxy := range f.proxies {
-		if proxy.Alive() {
-			return proxy
-		}
-	}
-	return f.proxies[0]
-}
-
-func (f *Fallback) validTest() {
-	wg := sync.WaitGroup{}
-	wg.Add(len(f.proxies))
-
-	for _, p := range f.proxies {
-		go func(p C.Proxy) {
-			p.URLTest(f.rawURL)
-			wg.Done()
-		}(p)
-	}
-
-	wg.Wait()
-}
-
-func NewFallback(option FallbackOption, proxies []C.Proxy) (*Fallback, error) {
-	_, err := urlToMetadata(option.URL)
-	if err != nil {
-		return nil, err
-	}
-
-	if len(proxies) < 1 {
-		return nil, errors.New("The number of proxies cannot be 0")
-	}
-
-	interval := time.Duration(option.Interval) * time.Second
-
-	Fallback := &Fallback{
-		Base: &Base{
-			name: option.Name,
-			tp:   C.Fallback,
-		},
-		proxies:  proxies,
-		rawURL:   option.URL,
-		interval: interval,
-		done:     make(chan struct{}),
-	}
-	go Fallback.loop()
-	return Fallback, nil
-}

adapters/outbound/http.go

@@ -1,120 +0,0 @@
-package adapters
-
-import (
-	"bufio"
-	"bytes"
-	"crypto/tls"
-	"encoding/base64"
-	"errors"
-	"fmt"
-	"io"
-	"net"
-	"net/http"
-	"strconv"
-
-	C "github.com/Dreamacro/clash/constant"
-)
-
-type Http struct {
-	*Base
-	addr           string
-	user           string
-	pass           string
-	tls            bool
-	skipCertVerify bool
-	tlsConfig      *tls.Config
-}
-
-type HttpOption struct {
-	Name           string `proxy:"name"`
-	Server         string `proxy:"server"`
-	Port           int    `proxy:"port"`
-	UserName       string `proxy:"username,omitempty"`
-	Password       string `proxy:"password,omitempty"`
-	TLS            bool   `proxy:"tls,omitempty"`
-	SkipCertVerify bool   `proxy:"skip-cert-verify,omitempty"`
-}
-
-func (h *Http) Dial(metadata *C.Metadata) (net.Conn, error) {
-	c, err := net.DialTimeout("tcp", h.addr, tcpTimeout)
-	if err == nil && h.tls {
-		cc := tls.Client(c, h.tlsConfig)
-		err = cc.Handshake()
-		c = cc
-	}
-
-	if err != nil {
-		return nil, fmt.Errorf("%s connect error", h.addr)
-	}
-	tcpKeepAlive(c)
-	if err := h.shakeHand(metadata, c); err != nil {
-		return nil, err
-	}
-
-	return c, nil
-}
-
-func (h *Http) shakeHand(metadata *C.Metadata, rw io.ReadWriter) error {
-	var buf bytes.Buffer
-	var err error
-
-	addr := net.JoinHostPort(metadata.String(), metadata.DstPort)
-	buf.WriteString("CONNECT " + addr + " HTTP/1.1\r\n")
-	buf.WriteString("Host: " + metadata.String() + "\r\n")
-	buf.WriteString("Proxy-Connection: Keep-Alive\r\n")
-
-	if h.user != "" && h.pass != "" {
-		auth := h.user + ":" + h.pass
-		buf.WriteString("Proxy-Authorization: Basic " + base64.StdEncoding.EncodeToString([]byte(auth)) + "\r\n")
-	}
-	// header ended
-	buf.WriteString("\r\n")
-
-	_, err = rw.Write(buf.Bytes())
-	if err != nil {
-		return err
-	}
-
-	var req http.Request
-	resp, err := http.ReadResponse(bufio.NewReader(rw), &req)
-	if err != nil {
-		return err
-	}
-
-	if resp.StatusCode == 200 {
-		return nil
-	}
-
-	if resp.StatusCode == 407 {
-		return errors.New("HTTP need auth")
-	}
-
-	if resp.StatusCode == 405 {
-		return errors.New("CONNECT method not allowed by proxy")
-	}
-	return fmt.Errorf("can not connect remote err code: %d", resp.StatusCode)
-}
-
-func NewHttp(option HttpOption) *Http {
-	var tlsConfig *tls.Config
-	if option.TLS {
-		tlsConfig = &tls.Config{
-			InsecureSkipVerify: option.SkipCertVerify,
-			ClientSessionCache: getClientSessionCache(),
-			ServerName:         option.Server,
-		}
-	}
-
-	return &Http{
-		Base: &Base{
-			name: option.Name,
-			tp:   C.Http,
-		},
-		addr:           net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
-		user:           option.UserName,
-		pass:           option.Password,
-		tls:            option.TLS,
-		skipCertVerify: option.SkipCertVerify,
-		tlsConfig:      tlsConfig,
-	}
-}

adapters/outbound/loadbalance.go

@@ -1,158 +0,0 @@
-package adapters
-
-import (
-	"encoding/json"
-	"errors"
-	"net"
-	"sync"
-	"time"
-
-	"github.com/Dreamacro/clash/common/murmur3"
-	C "github.com/Dreamacro/clash/constant"
-
-	"golang.org/x/net/publicsuffix"
-)
-
-type LoadBalance struct {
-	*Base
-	proxies  []C.Proxy
-	maxRetry int
-	rawURL   string
-	interval time.Duration
-	done     chan struct{}
-}
-
-func getKey(metadata *C.Metadata) string {
-	if metadata.Host != "" {
-		// ip host
-		if ip := net.ParseIP(metadata.Host); ip != nil {
-			return metadata.Host
-		}
-
-		if etld, err := publicsuffix.EffectiveTLDPlusOne(metadata.Host); err == nil {
-			return etld
-		}
-	}
-
-	if metadata.DstIP == nil {
-		return ""
-	}
-
-	return metadata.DstIP.String()
-}
-
-func jumpHash(key uint64, buckets int32) int32 {
-	var b, j int64
-
-	for j < int64(buckets) {
-		b = j
-		key = key*2862933555777941757 + 1
-		j = int64(float64(b+1) * (float64(int64(1)<<31) / float64((key>>33)+1)))
-	}
-
-	return int32(b)
-}
-
-func (lb *LoadBalance) Dial(metadata *C.Metadata) (net.Conn, error) {
-	key := uint64(murmur3.Sum32([]byte(getKey(metadata))))
-	buckets := int32(len(lb.proxies))
-	for i := 0; i < lb.maxRetry; i, key = i+1, key+1 {
-		idx := jumpHash(key, buckets)
-		proxy := lb.proxies[idx]
-		if proxy.Alive() {
-			return proxy.Dial(metadata)
-		}
-	}
-
-	return lb.proxies[0].Dial(metadata)
-}
-
-func (lb *LoadBalance) DialUDP(metadata *C.Metadata) (net.PacketConn, net.Addr, error) {
-	key := uint64(murmur3.Sum32([]byte(getKey(metadata))))
-	buckets := int32(len(lb.proxies))
-	for i := 0; i < lb.maxRetry; i, key = i+1, key+1 {
-		idx := jumpHash(key, buckets)
-		proxy := lb.proxies[idx]
-		if proxy.Alive() {
-			return proxy.DialUDP(metadata)
-		}
-	}
-
-	return lb.proxies[0].DialUDP(metadata)
-}
-
-func (lb *LoadBalance) SupportUDP() bool {
-	return true
-}
-
-func (lb *LoadBalance) Destroy() {
-	lb.done <- struct{}{}
-}
-
-func (lb *LoadBalance) validTest() {
-	wg := sync.WaitGroup{}
-	wg.Add(len(lb.proxies))
-
-	for _, p := range lb.proxies {
-		go func(p C.Proxy) {
-			p.URLTest(lb.rawURL)
-			wg.Done()
-		}(p)
-	}
-
-	wg.Wait()
-}
-
-func (lb *LoadBalance) loop() {
-	tick := time.NewTicker(lb.interval)
-	go lb.validTest()
-Loop:
-	for {
-		select {
-		case <-tick.C:
-			go lb.validTest()
-		case <-lb.done:
-			break Loop
-		}
-	}
-}
-
-func (lb *LoadBalance) MarshalJSON() ([]byte, error) {
-	var all []string
-	for _, proxy := range lb.proxies {
-		all = append(all, proxy.Name())
-	}
-	return json.Marshal(map[string]interface{}{
-		"type": lb.Type().String(),
-		"all":  all,
-	})
-}
-
-type LoadBalanceOption struct {
-	Name     string   `proxy:"name"`
-	Proxies  []string `proxy:"proxies"`
-	URL      string   `proxy:"url"`
-	Interval int      `proxy:"interval"`
-}
-
-func NewLoadBalance(option LoadBalanceOption, proxies []C.Proxy) (*LoadBalance, error) {
-	if len(proxies) == 0 {
-		return nil, errors.New("Provide at least one proxy")
-	}
-
-	interval := time.Duration(option.Interval) * time.Second
-
-	lb := &LoadBalance{
-		Base: &Base{
-			name: option.Name,
-			tp:   C.LoadBalance,
-		},
-		proxies:  proxies,
-		maxRetry: 3,
-		rawURL:   option.URL,
-		interval: interval,
-		done:     make(chan struct{}),
-	}
-	go lb.loop()
-	return lb, nil
-}

adapters/outbound/reject.go

@@ -1,54 +0,0 @@
-package adapters
-
-import (
-	"io"
-	"net"
-	"time"
-
-	C "github.com/Dreamacro/clash/constant"
-)
-
-type Reject struct {
-	*Base
-}
-
-func (r *Reject) Dial(metadata *C.Metadata) (net.Conn, error) {
-	return &NopConn{}, nil
-}
-
-func NewReject() *Reject {
-	return &Reject{
-		Base: &Base{
-			name: "REJECT",
-			tp:   C.Reject,
-		},
-	}
-}
-
-type NopConn struct{}
-
-func (rw *NopConn) Read(b []byte) (int, error) {
-	return 0, io.EOF
-}
-
-func (rw *NopConn) Write(b []byte) (int, error) {
-	return 0, io.EOF
-}
-
-// Close is fake function for net.Conn
-func (rw *NopConn) Close() error { return nil }
-
-// LocalAddr is fake function for net.Conn
-func (rw *NopConn) LocalAddr() net.Addr { return nil }
-
-// RemoteAddr is fake function for net.Conn
-func (rw *NopConn) RemoteAddr() net.Addr { return nil }
-
-// SetDeadline is fake function for net.Conn
-func (rw *NopConn) SetDeadline(time.Time) error { return nil }
-
-// SetReadDeadline is fake function for net.Conn
-func (rw *NopConn) SetReadDeadline(time.Time) error { return nil }
-
-// SetWriteDeadline is fake function for net.Conn
-func (rw *NopConn) SetWriteDeadline(time.Time) error { return nil }

adapters/outbound/selector.go

@@ -1,80 +0,0 @@
-package adapters
-
-import (
-	"encoding/json"
-	"errors"
-	"net"
-	"sort"
-
-	C "github.com/Dreamacro/clash/constant"
-)
-
-type Selector struct {
-	*Base
-	selected C.Proxy
-	proxies  map[string]C.Proxy
-}
-
-type SelectorOption struct {
-	Name    string   `proxy:"name"`
-	Proxies []string `proxy:"proxies"`
-}
-
-func (s *Selector) Dial(metadata *C.Metadata) (net.Conn, error) {
-	return s.selected.Dial(metadata)
-}
-
-func (s *Selector) DialUDP(metadata *C.Metadata) (net.PacketConn, net.Addr, error) {
-	return s.selected.DialUDP(metadata)
-}
-
-func (s *Selector) SupportUDP() bool {
-	return s.selected.SupportUDP()
-}
-
-func (s *Selector) MarshalJSON() ([]byte, error) {
-	var all []string
-	for k := range s.proxies {
-		all = append(all, k)
-	}
-	sort.Strings(all)
-	return json.Marshal(map[string]interface{}{
-		"type": s.Type().String(),
-		"now":  s.Now(),
-		"all":  all,
-	})
-}
-
-func (s *Selector) Now() string {
-	return s.selected.Name()
-}
-
-func (s *Selector) Set(name string) error {
-	proxy, exist := s.proxies[name]
-	if !exist {
-		return errors.New("Proxy does not exist")
-	}
-	s.selected = proxy
-	return nil
-}
-
-func NewSelector(name string, proxies []C.Proxy) (*Selector, error) {
-	if len(proxies) == 0 {
-		return nil, errors.New("Provide at least one proxy")
-	}
-
-	mapping := make(map[string]C.Proxy)
-	for _, proxy := range proxies {
-		mapping[proxy.Name()] = proxy
-	}
-
-	s := &Selector{
-		Base: &Base{
-			name: name,
-			tp:   C.Selector,
-		},
-		proxies:  mapping,
-		selected: proxies[0],
-	}
-	return s, nil
-}

adapters/outbound/shadowsocks.go

@@ -1,198 +0,0 @@
-package adapters
-
-import (
-	"crypto/tls"
-	"encoding/json"
-	"fmt"
-	"net"
-	"strconv"
-
-	"github.com/Dreamacro/clash/common/pool"
-	"github.com/Dreamacro/clash/common/structure"
-	obfs "github.com/Dreamacro/clash/component/simple-obfs"
-	"github.com/Dreamacro/clash/component/socks5"
-	v2rayObfs "github.com/Dreamacro/clash/component/v2ray-plugin"
-	C "github.com/Dreamacro/clash/constant"
-
-	"github.com/Dreamacro/go-shadowsocks2/core"
-)
-
-type ShadowSocks struct {
-	*Base
-	server string
-	cipher core.Cipher
-
-	// obfs
-	obfsMode   string
-	obfsOption *simpleObfsOption
-	wsOption   *v2rayObfs.WebsocketOption
-}
-
-type ShadowSocksOption struct {
-	Name       string                 `proxy:"name"`
-	Server     string                 `proxy:"server"`
-	Port       int                    `proxy:"port"`
-	Password   string                 `proxy:"password"`
-	Cipher     string                 `proxy:"cipher"`
-	UDP        bool                   `proxy:"udp,omitempty"`
-	Plugin     string                 `proxy:"plugin,omitempty"`
-	PluginOpts map[string]interface{} `proxy:"plugin-opts,omitempty"`
-
-	// deprecated when bump to 1.0
-	Obfs     string `proxy:"obfs,omitempty"`
-	ObfsHost string `proxy:"obfs-host,omitempty"`
-}
-
-type simpleObfsOption struct {
-	Mode string `obfs:"mode"`
-	Host string `obfs:"host,omitempty"`
-}
-
-type v2rayObfsOption struct {
-	Mode           string            `obfs:"mode"`
-	Host           string            `obfs:"host,omitempty"`
-	Path           string            `obfs:"path,omitempty"`
-	TLS            bool              `obfs:"tls,omitempty"`
-	Headers        map[string]string `obfs:"headers,omitempty"`
-	SkipCertVerify bool              `obfs:"skip-cert-verify,omitempty"`
-}
-
-func (ss *ShadowSocks) Dial(metadata *C.Metadata) (net.Conn, error) {
-	c, err := net.DialTimeout("tcp", ss.server, tcpTimeout)
-	if err != nil {
-		return nil, fmt.Errorf("%s connect error: %s", ss.server, err.Error())
-	}
-	tcpKeepAlive(c)
-	switch ss.obfsMode {
-	case "tls":
-		c = obfs.NewTLSObfs(c, ss.obfsOption.Host)
-	case "http":
-		_, port, _ := net.SplitHostPort(ss.server)
-		c = obfs.NewHTTPObfs(c, ss.obfsOption.Host, port)
-	case "websocket":
-		var err error
-		c, err = v2rayObfs.NewWebsocketObfs(c, ss.wsOption)
-		if err != nil {
-			return nil, fmt.Errorf("%s connect error: %s", ss.server, err.Error())
-		}
-	}
-	c = ss.cipher.StreamConn(c)
-	_, err = c.Write(serializesSocksAddr(metadata))
-	return c, err
-}
-
-func (ss *ShadowSocks) DialUDP(metadata *C.Metadata) (net.PacketConn, net.Addr, error) {
-	pc, err := net.ListenPacket("udp", "")
-	if err != nil {
-		return nil, nil, err
-	}
-
-	addr, err := net.ResolveUDPAddr("udp", ss.server)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	remoteAddr, err := net.ResolveUDPAddr("udp", net.JoinHostPort(metadata.String(), metadata.DstPort))
-	if err != nil {
-		return nil, nil, err
-	}
-
-	pc = ss.cipher.PacketConn(pc)
-	return &ssUDPConn{PacketConn: pc, rAddr: remoteAddr}, addr, nil
-}
-
-func (ss *ShadowSocks) MarshalJSON() ([]byte, error) {
-	return json.Marshal(map[string]string{
-		"type": ss.Type().String(),
-	})
-}
-
-func NewShadowSocks(option ShadowSocksOption) (*ShadowSocks, error) {
-	server := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
-	cipher := option.Cipher
-	password := option.Password
-	ciph, err := core.PickCipher(cipher, nil, password)
-	if err != nil {
-		return nil, fmt.Errorf("ss %s initialize error: %s", server, err.Error())
-	}
-
-	var wsOption *v2rayObfs.WebsocketOption
-	var obfsOption *simpleObfsOption
-	obfsMode := ""
-
-	// forward compatibility before 1.0
-	if option.Obfs != "" {
-		obfsMode = option.Obfs
-		obfsOption = &simpleObfsOption{
-			Host: "bing.com",
-		}
-		if option.ObfsHost != "" {
-			obfsOption.Host = option.ObfsHost
-		}
-	}
-
-	decoder := structure.NewDecoder(structure.Option{TagName: "obfs", WeaklyTypedInput: true})
-	if option.Plugin == "obfs" {
-		opts := simpleObfsOption{Host: "bing.com"}
-		if err := decoder.Decode(option.PluginOpts, &opts); err != nil {
-			return nil, fmt.Errorf("ss %s initialize obfs error: %s", server, err.Error())
-		}
-		obfsMode = opts.Mode
-		obfsOption = &opts
-	} else if option.Plugin == "v2ray-plugin" {
-		opts := v2rayObfsOption{Host: "bing.com"}
-		if err := decoder.Decode(option.PluginOpts, &opts); err != nil {
-			return nil, fmt.Errorf("ss %s initialize v2ray-plugin error: %s", server, err.Error())
-		}
-		obfsMode = opts.Mode
-		var tlsConfig *tls.Config
-		if opts.TLS {
-			tlsConfig = &tls.Config{
-				ServerName:         opts.Host,
-				InsecureSkipVerify: opts.SkipCertVerify,
-				ClientSessionCache: getClientSessionCache(),
-			}
-		}
-		wsOption = &v2rayObfs.WebsocketOption{
-			Host:      opts.Host,
-			Path:      opts.Path,
-			Headers:   opts.Headers,
-			TLSConfig: tlsConfig,
-		}
-	}
-
-	return &ShadowSocks{
-		Base: &Base{
-			name: option.Name,
-			tp:   C.Shadowsocks,
-			udp:  option.UDP,
-		},
-		server: server,
-		cipher: ciph,
-
-		obfsMode:   obfsMode,
-		wsOption:   wsOption,
-		obfsOption: obfsOption,
-	}, nil
-}
-
-type ssUDPConn struct {
-	net.PacketConn
-	rAddr net.Addr
-}
-
-func (uc *ssUDPConn) WriteTo(b []byte, addr net.Addr) (int, error) {
-	buf := pool.BufPool.Get().([]byte)
-	defer pool.BufPool.Put(buf[:cap(buf)])
-	rAddr := socks5.ParseAddr(uc.rAddr.String())
-	copy(buf[len(rAddr):], b)
-	copy(buf, rAddr)
-	return uc.PacketConn.WriteTo(buf[:len(rAddr)+len(b)], addr)
-}
-
-func (uc *ssUDPConn) ReadFrom(b []byte) (int, net.Addr, error) {
-	n, a, e := uc.PacketConn.ReadFrom(b)
-	addr := socks5.SplitAddr(b[:n])
-	copy(b, b[len(addr):])
-	return n - len(addr), a, e
-}

adapters/outbound/socks5.go

@@ -1,110 +0,0 @@
-package adapters
-
-import (
-	"crypto/tls"
-	"fmt"
-	"net"
-	"strconv"
-
-	"github.com/Dreamacro/clash/component/socks5"
-	C "github.com/Dreamacro/clash/constant"
-)
-
-type Socks5 struct {
-	*Base
-	addr           string
-	user           string
-	pass           string
-	tls            bool
-	skipCertVerify bool
-	tlsConfig      *tls.Config
-}
-
-type Socks5Option struct {
-	Name           string `proxy:"name"`
-	Server         string `proxy:"server"`
-	Port           int    `proxy:"port"`
-	UserName       string `proxy:"username,omitempty"`
-	Password       string `proxy:"password,omitempty"`
-	TLS            bool   `proxy:"tls,omitempty"`
-	UDP            bool   `proxy:"udp,omitempty"`
-	SkipCertVerify bool   `proxy:"skip-cert-verify,omitempty"`
-}
-
-func (ss *Socks5) Dial(metadata *C.Metadata) (net.Conn, error) {
-	c, err := net.DialTimeout("tcp", ss.addr, tcpTimeout)
-
-	if err == nil && ss.tls {
-		cc := tls.Client(c, ss.tlsConfig)
-		err = cc.Handshake()
-		c = cc
-	}
-
-	if err != nil {
-		return nil, fmt.Errorf("%s connect error", ss.addr)
-	}
-	tcpKeepAlive(c)
-	var user *socks5.User
-	if ss.user != "" {
-		user = &socks5.User{
-			Username: ss.user,
-			Password: ss.pass,
-		}
-	}
-	if err := socks5.ClientHandshake(c, serializesSocksAddr(metadata), socks5.CmdConnect, user); err != nil {
-		return nil, err
-	}
-	return c, nil
-}
-
-func (ss *Socks5) DialUDP(metadata *C.Metadata) (net.PacketConn, net.Addr, error) {
-	c, err := net.DialTimeout("tcp", ss.addr, tcpTimeout)
-
-	if err == nil && ss.tls {
-		cc := tls.Client(c, ss.tlsConfig)
-		err = cc.Handshake()
-		c = cc
-	}
-
-	if err != nil {
-		return nil, nil, fmt.Errorf("%s connect error", ss.addr)
-	}
-	tcpKeepAlive(c)
-	var user *socks5.User
-	if ss.user != "" {
-		user = &socks5.User{
-			Username: ss.user,
-			Password: ss.pass,
-		}
-	}
-
-	if err := socks5.ClientHandshake(c, serializesSocksAddr(metadata), socks5.CmdUDPAssociate, user); err != nil {
-		return nil, nil, err
-	}
-	return &fakeUDPConn{Conn: c}, c.LocalAddr(), nil
-}
-
-func NewSocks5(option Socks5Option) *Socks5 {
-	var tlsConfig *tls.Config
-	if option.TLS {
-		tlsConfig = &tls.Config{
-			InsecureSkipVerify: option.SkipCertVerify,
-			ClientSessionCache: getClientSessionCache(),
-			ServerName:         option.Server,
-		}
-	}
-
-	return &Socks5{
-		Base: &Base{
-			name: option.Name,
-			tp:   C.Socks5,
-			udp:  option.UDP,
-		},
-		addr:           net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
-		user:           option.UserName,
-		pass:           option.Password,
-		tls:            option.TLS,
-		skipCertVerify: option.SkipCertVerify,
-		tlsConfig:      tlsConfig,
-	}
-}

adapters/outbound/urltest.go

@@ -1,164 +0,0 @@
-package adapters
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"net"
-	"sort"
-	"sync"
-	"sync/atomic"
-	"time"
-
-	"github.com/Dreamacro/clash/common/picker"
-	C "github.com/Dreamacro/clash/constant"
-)
-
-type URLTest struct {
-	*Base
-	proxies  []C.Proxy
-	rawURL   string
-	fast     C.Proxy
-	interval time.Duration
-	done     chan struct{}
-	once     int32
-}
-
-type URLTestOption struct {
-	Name     string   `proxy:"name"`
-	Proxies  []string `proxy:"proxies"`
-	URL      string   `proxy:"url"`
-	Interval int      `proxy:"interval"`
-}
-
-func (u *URLTest) Now() string {
-	return u.fast.Name()
-}
-
-func (u *URLTest) Dial(metadata *C.Metadata) (net.Conn, error) {
-	a, err := u.fast.Dial(metadata)
-	if err != nil {
-		u.fallback()
-	}
-	return a, err
-}
-
-func (u *URLTest) DialUDP(metadata *C.Metadata) (net.PacketConn, net.Addr, error) {
-	return u.fast.DialUDP(metadata)
-}
-
-func (u *URLTest) SupportUDP() bool {
-	return u.fast.SupportUDP()
-}
-
-func (u *URLTest) MarshalJSON() ([]byte, error) {
-	var all []string
-	for _, proxy := range u.proxies {
-		all = append(all, proxy.Name())
-	}
-	sort.Strings(all)
-	return json.Marshal(map[string]interface{}{
-		"type": u.Type().String(),
-		"now":  u.Now(),
-		"all":  all,
-	})
-}
-
-func (u *URLTest) Destroy() {
-	u.done <- struct{}{}
-}
-
-func (u *URLTest) loop() {
-	tick := time.NewTicker(u.interval)
-	go u.speedTest()
-Loop:
-	for {
-		select {
-		case <-tick.C:
-			go u.speedTest()
-		case <-u.done:
-			break Loop
-		}
-	}
-}
-
-func (u *URLTest) fallback() {
-	fast := u.proxies[0]
-	min := fast.LastDelay()
-	for _, proxy := range u.proxies[1:] {
-		if !proxy.Alive() {
-			continue
-		}
-
-		delay := proxy.LastDelay()
-		if delay < min {
-			fast = proxy
-			min = delay
-		}
-	}
-	u.fast = fast
-}
-
-func (u *URLTest) speedTest() {
-	if !atomic.CompareAndSwapInt32(&u.once, 0, 1) {
-		return
-	}
-	defer atomic.StoreInt32(&u.once, 0)
-
-	wg := sync.WaitGroup{}
-	wg.Add(len(u.proxies))
-	c := make(chan interface{})
-	fast := picker.SelectFast(context.Background(), c)
-	timer := time.NewTimer(u.interval)
-
-	for _, p := range u.proxies {
-		go func(p C.Proxy) {
-			_, err := p.URLTest(u.rawURL)
-			if err == nil {
-				c <- p
-			}
-			wg.Done()
-		}(p)
-	}
-
-	go func() {
-		wg.Wait()
-		close(c)
-	}()
-
-	select {
-	case <-timer.C:
-		// Wait for fast to return or close.
-		<-fast
-	case p, open := <-fast:
-		if open {
-			u.fast = p.(C.Proxy)
-		}
-	}
-}
-
-func NewURLTest(option URLTestOption, proxies []C.Proxy) (*URLTest, error) {
-	_, err := urlToMetadata(option.URL)
-	if err != nil {
-		return nil, err
-	}
-	if len(proxies) < 1 {
-		return nil, errors.New("The number of proxies cannot be 0")
-	}
-
-	interval := time.Duration(option.Interval) * time.Second
-	urlTest := &URLTest{
-		Base: &Base{
-			name: option.Name,
-			tp:   C.URLTest,
-		},
-		proxies:  proxies[:],
-		rawURL:   option.URL,
-		fast:     proxies[0],
-		interval: interval,
-		done:     make(chan struct{}),
-		once:     0,
-	}
-	go urlTest.loop()
-	return urlTest, nil
-}

adapters/outbound/util.go

@@ -1,98 +0,0 @@
-package adapters
-
-import (
-	"bytes"
-	"crypto/tls"
-	"fmt"
-	"net"
-	"net/url"
-	"strconv"
-	"sync"
-	"time"
-
-	"github.com/Dreamacro/clash/component/socks5"
-	C "github.com/Dreamacro/clash/constant"
-)
-
-const (
-	tcpTimeout = 5 * time.Second
-)
-
-var (
-	globalClientSessionCache tls.ClientSessionCache
-	once                     sync.Once
-)
-
-func urlToMetadata(rawURL string) (addr C.Metadata, err error) {
-	u, err := url.Parse(rawURL)
-	if err != nil {
-		return
-	}
-
-	port := u.Port()
-	if port == "" {
-		if u.Scheme == "https" {
-			port = "443"
-		} else if u.Scheme == "http" {
-			port = "80"
-		} else {
-			err = fmt.Errorf("%s scheme not Support", rawURL)
-			return
-		}
-	}
-
-	addr = C.Metadata{
-		AddrType: C.AtypDomainName,
-		Host:     u.Hostname(),
-		DstIP:    nil,
-		DstPort:  port,
-	}
-	return
-}
-
-func tcpKeepAlive(c net.Conn) {
-	if tcp, ok := c.(*net.TCPConn); ok {
-		tcp.SetKeepAlive(true)
-		tcp.SetKeepAlivePeriod(30 * time.Second)
-	}
-}
-
-func getClientSessionCache() tls.ClientSessionCache {
-	once.Do(func() {
-		globalClientSessionCache = tls.NewLRUClientSessionCache(128)
-	})
-	return globalClientSessionCache
-}
-
-func serializesSocksAddr(metadata *C.Metadata) []byte {
-	var buf [][]byte
-	aType := uint8(metadata.AddrType)
-	p, _ := strconv.Atoi(metadata.DstPort)
-	port := []byte{uint8(p >> 8), uint8(p & 0xff)}
-	switch metadata.AddrType {
-	case socks5.AtypDomainName:
-		len := uint8(len(metadata.Host))
-		host := []byte(metadata.Host)
-		buf = [][]byte{{aType, len}, host, port}
-	case socks5.AtypIPv4:
-		host := metadata.DstIP.To4()
-		buf = [][]byte{{aType}, host, port}
-	case socks5.AtypIPv6:
-		host := metadata.DstIP.To16()
-		buf = [][]byte{{aType}, host, port}
-	}
-	return bytes.Join(buf, nil)
-}
-
-type fakeUDPConn struct {
-	net.Conn
-}
-
-func (fuc *fakeUDPConn) WriteTo(b []byte, addr net.Addr) (int, error) {
-	return fuc.Conn.Write(b)
-}
-
-func (fuc *fakeUDPConn) ReadFrom(b []byte) (int, net.Addr, error) {
-	n, err := fuc.Conn.Read(b)
-	return n, fuc.RemoteAddr(), err
-}

adapters/outbound/vmess.go

@@ -1,110 +0,0 @@
-package adapters
-
-import (
-	"fmt"
-	"net"
-	"strconv"
-	"strings"
-
-	"github.com/Dreamacro/clash/component/vmess"
-	C "github.com/Dreamacro/clash/constant"
-)
-
-type Vmess struct {
-	*Base
-	server string
-	client *vmess.Client
-}
-
-type VmessOption struct {
-	Name           string            `proxy:"name"`
-	Server         string            `proxy:"server"`
-	Port           int               `proxy:"port"`
-	UUID           string            `proxy:"uuid"`
-	AlterID        int               `proxy:"alterId"`
-	Cipher         string            `proxy:"cipher"`
-	TLS            bool              `proxy:"tls,omitempty"`
-	UDP            bool              `proxy:"udp,omitempty"`
-	Network        string            `proxy:"network,omitempty"`
-	WSPath         string            `proxy:"ws-path,omitempty"`
-	WSHeaders      map[string]string `proxy:"ws-headers,omitempty"`
-	SkipCertVerify bool              `proxy:"skip-cert-verify,omitempty"`
-}
-
-func (v *Vmess) Dial(metadata *C.Metadata) (net.Conn, error) {
-	c, err := net.DialTimeout("tcp", v.server, tcpTimeout)
-	if err != nil {
-		return nil, fmt.Errorf("%s connect error", v.server)
-	}
-	tcpKeepAlive(c)
-	c, err = v.client.New(c, parseVmessAddr(metadata))
-	return c, err
-}
-
-func (v *Vmess) DialUDP(metadata *C.Metadata) (net.PacketConn, net.Addr, error) {
-	c, err := net.DialTimeout("tcp", v.server, tcpTimeout)
-	if err != nil {
-		return nil, nil, fmt.Errorf("%s connect error", v.server)
-	}
-	tcpKeepAlive(c)
-	c, err = v.client.New(c, parseVmessAddr(metadata))
-	return &fakeUDPConn{Conn: c}, c.LocalAddr(), err
-}
-
-func NewVmess(option VmessOption) (*Vmess, error) {
-	security := strings.ToLower(option.Cipher)
-	client, err := vmess.NewClient(vmess.Config{
-		UUID:             option.UUID,
-		AlterID:          uint16(option.AlterID),
-		Security:         security,
-		TLS:              option.TLS,
-		HostName:         option.Server,
-		Port:             strconv.Itoa(option.Port),
-		NetWork:          option.Network,
-		WebSocketPath:    option.WSPath,
-		WebSocketHeaders: option.WSHeaders,
-		SkipCertVerify:   option.SkipCertVerify,
-		SessionCacahe:    getClientSessionCache(),
-	})
-	if err != nil {
-		return nil, err
-	}
-
-	return &Vmess{
-		Base: &Base{
-			name: option.Name,
-			tp:   C.Vmess,
-			udp:  option.UDP,
-		},
-		server: net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
-		client: client,
-	}, nil
-}
-
-func parseVmessAddr(metadata *C.Metadata) *vmess.DstAddr {
-	var addrType byte
-	var addr []byte
-	switch metadata.AddrType {
-	case C.AtypIPv4:
-		addrType = byte(vmess.AtypIPv4)
-		addr = make([]byte, net.IPv4len)
-		copy(addr[:], metadata.DstIP.To4())
-	case C.AtypIPv6:
-		addrType = byte(vmess.AtypIPv6)
-		addr = make([]byte, net.IPv6len)
-		copy(addr[:], metadata.DstIP.To16())
-	case C.AtypDomainName:
-		addrType = byte(vmess.AtypDomainName)
-		addr = make([]byte, len(metadata.Host)+1)
-		addr[0] = byte(len(metadata.Host))
-		copy(addr[1:], []byte(metadata.Host))
-	}
-
-	port, _ := strconv.Atoi(metadata.DstPort)
-	return &vmess.DstAddr{
-		UDP:      metadata.NetWork == C.UDP,
-		AddrType: addrType,
-		Addr:     addr,
-		Port:     uint(port),
-	}
-}

common/batch/batch.go

@@ -0,0 +1,105 @@
+package batch
+
+import (
+	"context"
+	"sync"
+)
+
+type Option[T any] func(b *Batch[T])
+
+type Result[T any] struct {
+	Value T
+	Err   error
+}
+
+type Error struct {
+	Key string
+	Err error
+}
+
+func WithConcurrencyNum[T any](n int) Option[T] {
+	return func(b *Batch[T]) {
+		q := make(chan struct{}, n)
+		for i := 0; i < n; i++ {
+			q <- struct{}{}
+		}
+		b.queue = q
+	}
+}
+
+// Batch similar to errgroup, but can control the maximum number of concurrent
+type Batch[T any] struct {
+	result map[string]Result[T]
+	queue  chan struct{}
+	wg     sync.WaitGroup
+	mux    sync.Mutex
+	err    *Error
+	once   sync.Once
+	cancel func()
+}
+
+func (b *Batch[T]) Go(key string, fn func() (T, error)) {
+	b.wg.Add(1)
+	go func() {
+		defer b.wg.Done()
+		if b.queue != nil {
+			<-b.queue
+			defer func() {
+				b.queue <- struct{}{}
+			}()
+		}
+
+		value, err := fn()
+		if err != nil {
+			b.once.Do(func() {
+				b.err = &Error{key, err}
+				if b.cancel != nil {
+					b.cancel()
+				}
+			})
+		}
+
+		ret := Result[T]{value, err}
+		b.mux.Lock()
+		defer b.mux.Unlock()
+		b.result[key] = ret
+	}()
+}
+
+func (b *Batch[T]) Wait() *Error {
+	b.wg.Wait()
+	if b.cancel != nil {
+		b.cancel()
+	}
+	return b.err
+}
+
+func (b *Batch[T]) WaitAndGetResult() (map[string]Result[T], *Error) {
+	err := b.Wait()
+	return b.Result(), err
+}
+
+func (b *Batch[T]) Result() map[string]Result[T] {
+	b.mux.Lock()
+	defer b.mux.Unlock()
+	copyM := map[string]Result[T]{}
+	for k, v := range b.result {
+		copyM[k] = v
+	}
+	return copyM
+}
+
+func New[T any](ctx context.Context, opts ...Option[T]) (*Batch[T], context.Context) {
+	ctx, cancel := context.WithCancel(ctx)
+
+	b := &Batch[T]{
+		result: map[string]Result[T]{},
+	}
+
+	for _, o := range opts {
+		o(b)
+	}
+
+	b.cancel = cancel
+	return b, ctx
+}

common/batch/batch_test.go

@@ -0,0 +1,83 @@
+package batch
+
+import (
+	"context"
+	"errors"
+	"strconv"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestBatch(t *testing.T) {
+	b, _ := New[string](context.Background())
+
+	now := time.Now()
+	b.Go("foo", func() (string, error) {
+		time.Sleep(time.Millisecond * 100)
+		return "foo", nil
+	})
+	b.Go("bar", func() (string, error) {
+		time.Sleep(time.Millisecond * 150)
+		return "bar", nil
+	})
+	result, err := b.WaitAndGetResult()
+
+	assert.Nil(t, err)
+
+	duration := time.Since(now)
+	assert.Less(t, duration, time.Millisecond*200)
+	assert.Equal(t, 2, len(result))
+
+	for k, v := range result {
+		assert.NoError(t, v.Err)
+		assert.Equal(t, k, v.Value)
+	}
+}
+
+func TestBatchWithConcurrencyNum(t *testing.T) {
+	b, _ := New[string](
+		context.Background(),
+		WithConcurrencyNum[string](3),
+	)
+
+	now := time.Now()
+	for i := 0; i < 7; i++ {
+		idx := i
+		b.Go(strconv.Itoa(idx), func() (string, error) {
+			time.Sleep(time.Millisecond * 100)
+			return strconv.Itoa(idx), nil
+		})
+	}
+	result, _ := b.WaitAndGetResult()
+	duration := time.Since(now)
+	assert.Greater(t, duration, time.Millisecond*260)
+	assert.Equal(t, 7, len(result))
+
+	for k, v := range result {
+		assert.NoError(t, v.Err)
+		assert.Equal(t, k, v.Value)
+	}
+}
+
+func TestBatchContext(t *testing.T) {
+	b, ctx := New[string](context.Background())
+
+	b.Go("error", func() (string, error) {
+		time.Sleep(time.Millisecond * 100)
+		return "", errors.New("test error")
+	})
+
+	b.Go("ctx", func() (string, error) {
+		<-ctx.Done()
+		return "", ctx.Err()
+	})
+
+	result, err := b.WaitAndGetResult()
+
+	assert.NotNil(t, err)
+	assert.Equal(t, "error", err.Key)
+
+	assert.Equal(t, ctx.Err(), result["ctx"].Err)
+}

common/cache/cache.go

@@ -7,50 +7,50 @@ import (
 )
 
 // Cache store element with a expired time
-type Cache struct {
+type Cache[K comparable, V any] struct {
-	*cache
+	*cache[K, V]
 }
 
-type cache struct {
+type cache[K comparable, V any] struct {
 	mapping sync.Map
-	janitor *janitor
+	janitor *janitor[K, V]
 }
 
-type element struct {
+type element[V any] struct {
 	Expired time.Time
-	Payload interface{}
+	Payload V
 }
 
 // Put element in Cache with its ttl
-func (c *cache) Put(key interface{}, payload interface{}, ttl time.Duration) {
+func (c *cache[K, V]) Put(key K, payload V, ttl time.Duration) {
-	c.mapping.Store(key, &element{
+	c.mapping.Store(key, &element[V]{
 		Payload: payload,
 		Expired: time.Now().Add(ttl),
 	})
 }
 
 // Get element in Cache, and drop when it expired
-func (c *cache) Get(key interface{}) interface{} {
+func (c *cache[K, V]) Get(key K) V {
 	item, exist := c.mapping.Load(key)
 	if !exist {
-		return nil
+		return getZero[V]()
 	}
-	elm := item.(*element)
+	elm := item.(*element[V])
 	// expired
 	if time.Since(elm.Expired) > 0 {
 		c.mapping.Delete(key)
-		return nil
+		return getZero[V]()
 	}
 	return elm.Payload
 }
 
 // GetWithExpire element in Cache with Expire Time
-func (c *cache) GetWithExpire(key interface{}) (payload interface{}, expired time.Time) {
+func (c *cache[K, V]) GetWithExpire(key K) (payload V, expired time.Time) {
 	item, exist := c.mapping.Load(key)
 	if !exist {
 		return
 	}
-	elm := item.(*element)
+	elm := item.(*element[V])
 	// expired
 	if time.Since(elm.Expired) > 0 {
 		c.mapping.Delete(key)
@@ -59,10 +59,10 @@ func (c *cache) GetWithExpire(key interface{}) (payload interface{}, expired tim
 	return elm.Payload, elm.Expired
 }
 
-func (c *cache) cleanup() {
+func (c *cache[K, V]) cleanup() {
-	c.mapping.Range(func(k, v interface{}) bool {
+	c.mapping.Range(func(k, v any) bool {
 		key := k.(string)
-		elm := v.(*element)
+		elm := v.(*element[V])
 		if time.Since(elm.Expired) > 0 {
 			c.mapping.Delete(key)
 		}
@@ -70,12 +70,12 @@ func (c *cache) cleanup() {
 	})
 }
 
-type janitor struct {
+type janitor[K comparable, V any] struct {
 	interval time.Duration
 	stop     chan struct{}
 }
 
-func (j *janitor) process(c *cache) {
+func (j *janitor[K, V]) process(c *cache[K, V]) {
 	ticker := time.NewTicker(j.interval)
 	for {
 		select {
@@ -88,19 +88,19 @@ func (j *janitor) process(c *cache) {
 	}
 }
 
-func stopJanitor(c *Cache) {
+func stopJanitor[K comparable, V any](c *Cache[K, V]) {
 	c.janitor.stop <- struct{}{}
 }
 
 // New return *Cache
-func New(interval time.Duration) *Cache {
+func New[K comparable, V any](interval time.Duration) *Cache[K, V] {
-	j := &janitor{
+	j := &janitor[K, V]{
 		interval: interval,
 		stop:     make(chan struct{}),
 	}
-	c := &cache{janitor: j}
+	c := &cache[K, V]{janitor: j}
 	go j.process(c)
-	C := &Cache{c}
+	C := &Cache[K, V]{c}
-	runtime.SetFinalizer(C, stopJanitor)
+	runtime.SetFinalizer(C, stopJanitor[K, V])
 	return C
 }

common/cache/cache_test.go

@@ -4,55 +4,57 @@ import (
 	"runtime"
 	"testing"
 	"time"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestCache_Basic(t *testing.T) {
 	interval := 200 * time.Millisecond
 	ttl := 20 * time.Millisecond
-	c := New(interval)
+	c := New[string, int](interval)
 	c.Put("int", 1, ttl)
-	c.Put("string", "a", ttl)
+
+	d := New[string, string](interval)
+	d.Put("string", "a", ttl)
 
 	i := c.Get("int")
-	if i.(int) != 1 {
+	assert.Equal(t, i, 1, "should recv 1")
-		t.Error("should recv 1")
-	}
 
-	s := c.Get("string")
+	s := d.Get("string")
-	if s.(string) != "a" {
+	assert.Equal(t, s, "a", "should recv 'a'")
-		t.Error("should recv 'a'")
-	}
 }
 
 func TestCache_TTL(t *testing.T) {
 	interval := 200 * time.Millisecond
 	ttl := 20 * time.Millisecond
-	c := New(interval)
+	now := time.Now()
+	c := New[string, int](interval)
 	c.Put("int", 1, ttl)
+	c.Put("int2", 2, ttl)
 
 	i := c.Get("int")
-	if i.(int) != 1 {
+	_, expired := c.GetWithExpire("int2")
-		t.Error("should recv 1")
+	assert.Equal(t, i, 1, "should recv 1")
-	}
+	assert.True(t, now.Before(expired))
 
 	time.Sleep(ttl * 2)
 	i = c.Get("int")
-	if i != nil {
+	j, _ := c.GetWithExpire("int2")
-		t.Error("should recv nil")
+	assert.True(t, i == 0, "should recv 0")
-	}
+	assert.True(t, j == 0, "should recv 0")
 }
 
 func TestCache_AutoCleanup(t *testing.T) {
 	interval := 10 * time.Millisecond
 	ttl := 15 * time.Millisecond
-	c := New(interval)
+	c := New[string, int](interval)
 	c.Put("int", 1, ttl)
 
 	time.Sleep(ttl * 2)
 	i := c.Get("int")
-	if i != nil {
+	j, _ := c.GetWithExpire("int")
-		t.Error("should recv nil")
+	assert.True(t, i == 0, "should recv 0")
-	}
+	assert.True(t, j == 0, "should recv 0")
 }
 
 func TestCache_AutoGC(t *testing.T) {
@@ -60,7 +62,7 @@ func TestCache_AutoGC(t *testing.T) {
 	go func() {
 		interval := 10 * time.Millisecond
 		ttl := 15 * time.Millisecond
-		c := New(interval)
+		c := New[string, int](interval)
 		c.Put("int", 1, ttl)
 		sign <- struct{}{}
 	}()

common/cache/lrucache.go

@@ -0,0 +1,238 @@
+package cache
+
+// Modified by https://github.com/die-net/lrucache
+
+import (
+	"sync"
+	"time"
+
+	"github.com/Dreamacro/clash/common/generics/list"
+)
+
+// Option is part of Functional Options Pattern
+type Option[K comparable, V any] func(*LruCache[K, V])
+
+// EvictCallback is used to get a callback when a cache entry is evicted
+type EvictCallback[K comparable, V any] func(key K, value V)
+
+// WithEvict set the evict callback
+func WithEvict[K comparable, V any](cb EvictCallback[K, V]) Option[K, V] {
+	return func(l *LruCache[K, V]) {
+		l.onEvict = cb
+	}
+}
+
+// WithUpdateAgeOnGet update expires when Get element
+func WithUpdateAgeOnGet[K comparable, V any]() Option[K, V] {
+	return func(l *LruCache[K, V]) {
+		l.updateAgeOnGet = true
+	}
+}
+
+// WithAge defined element max age (second)
+func WithAge[K comparable, V any](maxAge int64) Option[K, V] {
+	return func(l *LruCache[K, V]) {
+		l.maxAge = maxAge
+	}
+}
+
+// WithSize defined max length of LruCache
+func WithSize[K comparable, V any](maxSize int) Option[K, V] {
+	return func(l *LruCache[K, V]) {
+		l.maxSize = maxSize
+	}
+}
+
+// WithStale decide whether Stale return is enabled.
+// If this feature is enabled, element will not get Evicted according to `WithAge`.
+func WithStale[K comparable, V any](stale bool) Option[K, V] {
+	return func(l *LruCache[K, V]) {
+		l.staleReturn = stale
+	}
+}
+
+// LruCache is a thread-safe, in-memory lru-cache that evicts the
+// least recently used entries from memory when (if set) the entries are
+// older than maxAge (in seconds).  Use the New constructor to create one.
+type LruCache[K comparable, V any] struct {
+	maxAge         int64
+	maxSize        int
+	mu             sync.Mutex
+	cache          map[K]*list.Element[*entry[K, V]]
+	lru            *list.List[*entry[K, V]] // Front is least-recent
+	updateAgeOnGet bool
+	staleReturn    bool
+	onEvict        EvictCallback[K, V]
+}
+
+// NewLRUCache creates an LruCache
+func NewLRUCache[K comparable, V any](options ...Option[K, V]) *LruCache[K, V] {
+	lc := &LruCache[K, V]{
+		lru:   list.New[*entry[K, V]](),
+		cache: make(map[K]*list.Element[*entry[K, V]]),
+	}
+
+	for _, option := range options {
+		option(lc)
+	}
+
+	return lc
+}
+
+// Get returns the any representation of a cached response and a bool
+// set to true if the key was found.
+func (c *LruCache[K, V]) Get(key K) (V, bool) {
+	el := c.get(key)
+	if el == nil {
+		return getZero[V](), false
+	}
+	value := el.value
+
+	return value, true
+}
+
+// GetWithExpire returns the any representation of a cached response,
+// a time.Time Give expected expires,
+// and a bool set to true if the key was found.
+// This method will NOT check the maxAge of element and will NOT update the expires.
+func (c *LruCache[K, V]) GetWithExpire(key K) (V, time.Time, bool) {
+	el := c.get(key)
+	if el == nil {
+		return getZero[V](), time.Time{}, false
+	}
+
+	return el.value, time.Unix(el.expires, 0), true
+}
+
+// Exist returns if key exist in cache but not put item to the head of linked list
+func (c *LruCache[K, V]) Exist(key K) bool {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	_, ok := c.cache[key]
+	return ok
+}
+
+// Set stores the any representation of a response for a given key.
+func (c *LruCache[K, V]) Set(key K, value V) {
+	expires := int64(0)
+	if c.maxAge > 0 {
+		expires = time.Now().Unix() + c.maxAge
+	}
+	c.SetWithExpire(key, value, time.Unix(expires, 0))
+}
+
+// SetWithExpire stores the any representation of a response for a given key and given expires.
+// The expires time will round to second.
+func (c *LruCache[K, V]) SetWithExpire(key K, value V, expires time.Time) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	if le, ok := c.cache[key]; ok {
+		c.lru.MoveToBack(le)
+		e := le.Value
+		e.value = value
+		e.expires = expires.Unix()
+	} else {
+		e := &entry[K, V]{key: key, value: value, expires: expires.Unix()}
+		c.cache[key] = c.lru.PushBack(e)
+
+		if c.maxSize > 0 {
+			if elLen := c.lru.Len(); elLen > c.maxSize {
+				c.deleteElement(c.lru.Front())
+			}
+		}
+	}
+
+	c.maybeDeleteOldest()
+}
+
+// CloneTo clone and overwrite elements to another LruCache
+func (c *LruCache[K, V]) CloneTo(n *LruCache[K, V]) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	n.mu.Lock()
+	defer n.mu.Unlock()
+
+	n.lru = list.New[*entry[K, V]]()
+	n.cache = make(map[K]*list.Element[*entry[K, V]])
+
+	for e := c.lru.Front(); e != nil; e = e.Next() {
+		elm := e.Value
+		n.cache[elm.key] = n.lru.PushBack(elm)
+	}
+}
+
+func (c *LruCache[K, V]) get(key K) *entry[K, V] {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	le, ok := c.cache[key]
+	if !ok {
+		return nil
+	}
+
+	if !c.staleReturn && c.maxAge > 0 && le.Value.expires <= time.Now().Unix() {
+		c.deleteElement(le)
+		c.maybeDeleteOldest()
+
+		return nil
+	}
+
+	c.lru.MoveToBack(le)
+	el := le.Value
+	if c.maxAge > 0 && c.updateAgeOnGet {
+		el.expires = time.Now().Unix() + c.maxAge
+	}
+	return el
+}
+
+// Delete removes the value associated with a key.
+func (c *LruCache[K, V]) Delete(key K) {
+	c.mu.Lock()
+
+	if le, ok := c.cache[key]; ok {
+		c.deleteElement(le)
+	}
+
+	c.mu.Unlock()
+}
+
+func (c *LruCache[K, V]) maybeDeleteOldest() {
+	if !c.staleReturn && c.maxAge > 0 {
+		now := time.Now().Unix()
+		for le := c.lru.Front(); le != nil && le.Value.expires <= now; le = c.lru.Front() {
+			c.deleteElement(le)
+		}
+	}
+}
+
+func (c *LruCache[K, V]) deleteElement(le *list.Element[*entry[K, V]]) {
+	c.lru.Remove(le)
+	e := le.Value
+	delete(c.cache, e.key)
+	if c.onEvict != nil {
+		c.onEvict(e.key, e.value)
+	}
+}
+
+func (c *LruCache[K, V]) Clear() error {
+	c.mu.Lock()
+
+	c.cache = make(map[K]*list.Element[*entry[K, V]])
+
+	c.mu.Unlock()
+	return nil
+}
+
+type entry[K comparable, V any] struct {
+	key     K
+	value   V
+	expires int64
+}
+
+func getZero[T any]() T {
+	var result T
+	return result
+}

common/cache/lrucache_test.go

@@ -0,0 +1,184 @@
+package cache
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+var entries = []struct {
+	key   string
+	value string
+}{
+	{"1", "one"},
+	{"2", "two"},
+	{"3", "three"},
+	{"4", "four"},
+	{"5", "five"},
+}
+
+func TestLRUCache(t *testing.T) {
+	c := NewLRUCache[string, string]()
+
+	for _, e := range entries {
+		c.Set(e.key, e.value)
+	}
+
+	c.Delete("missing")
+	_, ok := c.Get("missing")
+	assert.False(t, ok)
+
+	for _, e := range entries {
+		value, ok := c.Get(e.key)
+		if assert.True(t, ok) {
+			assert.Equal(t, e.value, value)
+		}
+	}
+
+	for _, e := range entries {
+		c.Delete(e.key)
+
+		_, ok := c.Get(e.key)
+		assert.False(t, ok)
+	}
+}
+
+func TestLRUMaxAge(t *testing.T) {
+	c := NewLRUCache[string, string](WithAge[string, string](86400))
+
+	now := time.Now().Unix()
+	expected := now + 86400
+
+	// Add one expired entry
+	c.Set("foo", "bar")
+	c.lru.Back().Value.expires = now
+
+	// Reset
+	c.Set("foo", "bar")
+	e := c.lru.Back().Value
+	assert.True(t, e.expires >= now)
+	c.lru.Back().Value.expires = now
+
+	// Set a few and verify expiration times
+	for _, s := range entries {
+		c.Set(s.key, s.value)
+		e := c.lru.Back().Value
+		assert.True(t, e.expires >= expected && e.expires <= expected+10)
+	}
+
+	// Make sure we can get them all
+	for _, s := range entries {
+		_, ok := c.Get(s.key)
+		assert.True(t, ok)
+	}
+
+	// Expire all entries
+	for _, s := range entries {
+		le, ok := c.cache[s.key]
+		if assert.True(t, ok) {
+			le.Value.expires = now
+		}
+	}
+
+	// Get one expired entry, which should clear all expired entries
+	_, ok := c.Get("3")
+	assert.False(t, ok)
+	assert.Equal(t, c.lru.Len(), 0)
+}
+
+func TestLRUpdateOnGet(t *testing.T) {
+	c := NewLRUCache[string, string](WithAge[string, string](86400), WithUpdateAgeOnGet[string, string]())
+
+	now := time.Now().Unix()
+	expires := now + 86400/2
+
+	// Add one expired entry
+	c.Set("foo", "bar")
+	c.lru.Back().Value.expires = expires
+
+	_, ok := c.Get("foo")
+	assert.True(t, ok)
+	assert.True(t, c.lru.Back().Value.expires > expires)
+}
+
+func TestMaxSize(t *testing.T) {
+	c := NewLRUCache[string, string](WithSize[string, string](2))
+	// Add one expired entry
+	c.Set("foo", "bar")
+	_, ok := c.Get("foo")
+	assert.True(t, ok)
+
+	c.Set("bar", "foo")
+	c.Set("baz", "foo")
+
+	_, ok = c.Get("foo")
+	assert.False(t, ok)
+}
+
+func TestExist(t *testing.T) {
+	c := NewLRUCache[int, int](WithSize[int, int](1))
+	c.Set(1, 2)
+	assert.True(t, c.Exist(1))
+	c.Set(2, 3)
+	assert.False(t, c.Exist(1))
+}
+
+func TestEvict(t *testing.T) {
+	temp := 0
+	evict := func(key int, value int) {
+		temp = key + value
+	}
+
+	c := NewLRUCache[int, int](WithEvict[int, int](evict), WithSize[int, int](1))
+	c.Set(1, 2)
+	c.Set(2, 3)
+
+	assert.Equal(t, temp, 3)
+}
+
+func TestSetWithExpire(t *testing.T) {
+	c := NewLRUCache[int, *struct{}](WithAge[int, *struct{}](1))
+	now := time.Now().Unix()
+
+	tenSecBefore := time.Unix(now-10, 0)
+	c.SetWithExpire(1, &struct{}{}, tenSecBefore)
+
+	// res is expected not to exist, and expires should be empty time.Time
+	res, expires, exist := c.GetWithExpire(1)
+
+	assert.True(t, nil == res)
+	assert.Equal(t, time.Time{}, expires)
+	assert.Equal(t, false, exist)
+}
+
+func TestStale(t *testing.T) {
+	c := NewLRUCache[int, int](WithAge[int, int](1), WithStale[int, int](true))
+	now := time.Now().Unix()
+
+	tenSecBefore := time.Unix(now-10, 0)
+	c.SetWithExpire(1, 2, tenSecBefore)
+
+	res, expires, exist := c.GetWithExpire(1)
+	assert.Equal(t, 2, res)
+	assert.Equal(t, tenSecBefore, expires)
+	assert.Equal(t, true, exist)
+}
+
+func TestCloneTo(t *testing.T) {
+	o := NewLRUCache[string, int](WithSize[string, int](10))
+	o.Set("1", 1)
+	o.Set("2", 2)
+
+	n := NewLRUCache[string, int](WithSize[string, int](2))
+	n.Set("3", 3)
+	n.Set("4", 4)
+
+	o.CloneTo(n)
+
+	assert.False(t, n.Exist("3"))
+	assert.True(t, n.Exist("1"))
+
+	n.Set("5", 5)
+	assert.False(t, n.Exist("1"))
+}

common/cert/cert.go

@@ -0,0 +1,303 @@
+package cert
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/sha1"
+	"crypto/tls"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/pem"
+	"math/big"
+	"net"
+	"os"
+	"strings"
+	"sync/atomic"
+	"time"
+)
+
+var currentSerialNumber = time.Now().Unix()
+
+type Config struct {
+	ca           *x509.Certificate
+	caPrivateKey *rsa.PrivateKey
+
+	roots *x509.CertPool
+
+	privateKey *rsa.PrivateKey
+
+	validity     time.Duration
+	keyID        []byte
+	organization string
+
+	certsStorage CertsStorage
+}
+
+type CertsStorage interface {
+	Get(key string) (*tls.Certificate, bool)
+
+	Set(key string, cert *tls.Certificate)
+}
+
+func NewAuthority(name, organization string, validity time.Duration) (*x509.Certificate, *rsa.PrivateKey, error) {
+	privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		return nil, nil, err
+	}
+	pub := privateKey.Public()
+
+	pkixPub, err := x509.MarshalPKIXPublicKey(pub)
+	if err != nil {
+		return nil, nil, err
+	}
+	h := sha1.New()
+	_, err = h.Write(pkixPub)
+	if err != nil {
+		return nil, nil, err
+	}
+	keyID := h.Sum(nil)
+
+	serial := atomic.AddInt64(&currentSerialNumber, 1)
+
+	tmpl := &x509.Certificate{
+		SerialNumber: big.NewInt(serial),
+		Subject: pkix.Name{
+			CommonName:   name,
+			Organization: []string{organization},
+		},
+		SubjectKeyId:          keyID,
+		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
+		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+		BasicConstraintsValid: true,
+		NotBefore:             time.Now().Add(-validity),
+		NotAfter:              time.Now().Add(validity),
+		DNSNames:              []string{name},
+		IsCA:                  true,
+	}
+
+	raw, err := x509.CreateCertificate(rand.Reader, tmpl, tmpl, pub, privateKey)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	x509c, err := x509.ParseCertificate(raw)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return x509c, privateKey, nil
+}
+
+func NewConfig(ca *x509.Certificate, caPrivateKey *rsa.PrivateKey) (*Config, error) {
+	roots := x509.NewCertPool()
+	roots.AddCert(ca)
+
+	privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		return nil, err
+	}
+	pub := privateKey.Public()
+
+	pkixPub, err := x509.MarshalPKIXPublicKey(pub)
+	if err != nil {
+		return nil, err
+	}
+	h := sha1.New()
+	_, err = h.Write(pkixPub)
+	if err != nil {
+		return nil, err
+	}
+	keyID := h.Sum(nil)
+
+	return &Config{
+		ca:           ca,
+		caPrivateKey: caPrivateKey,
+		privateKey:   privateKey,
+		keyID:        keyID,
+		validity:     time.Hour,
+		organization: "Clash",
+		certsStorage: NewDomainTrieCertsStorage(),
+		roots:        roots,
+	}, nil
+}
+
+func (c *Config) GetCA() *x509.Certificate {
+	return c.ca
+}
+
+func (c *Config) SetOrganization(organization string) {
+	c.organization = organization
+}
+
+func (c *Config) SetValidity(validity time.Duration) {
+	c.validity = validity
+}
+
+func (c *Config) NewTLSConfigForHost(hostname string) *tls.Config {
+	tlsConfig := &tls.Config{
+		GetCertificate: func(clientHello *tls.ClientHelloInfo) (*tls.Certificate, error) {
+			host := clientHello.ServerName
+			if host == "" {
+				host = hostname
+			}
+
+			return c.GetOrCreateCert(host)
+		},
+		NextProtos: []string{"http/1.1"},
+	}
+
+	tlsConfig.InsecureSkipVerify = true
+
+	return tlsConfig
+}
+
+func (c *Config) GetOrCreateCert(hostname string, ips ...net.IP) (*tls.Certificate, error) {
+	var leaf *x509.Certificate
+	tlsCertificate, ok := c.certsStorage.Get(hostname)
+	if ok {
+		leaf = tlsCertificate.Leaf
+		if _, err := leaf.Verify(x509.VerifyOptions{
+			DNSName: hostname,
+			Roots:   c.roots,
+		}); err == nil {
+			return tlsCertificate, nil
+		}
+	}
+
+	var (
+		key          = hostname
+		topHost      = hostname
+		wildcardHost = "*." + hostname
+		dnsNames     []string
+	)
+
+	if ip := net.ParseIP(hostname); ip != nil {
+		ips = append(ips, ip)
+	} else {
+		parts := strings.Split(hostname, ".")
+		l := len(parts)
+
+		if leaf != nil {
+			dnsNames = append(dnsNames, leaf.DNSNames...)
+		}
+
+		if l > 2 {
+			topIndex := l - 2
+			topHost = strings.Join(parts[topIndex:], ".")
+
+			for i := topIndex; i > 0; i-- {
+				wildcardHost = "*." + strings.Join(parts[i:], ".")
+
+				if i == topIndex && (len(dnsNames) == 0 || dnsNames[0] != topHost) {
+					dnsNames = append(dnsNames, topHost, wildcardHost)
+				} else if !hasDnsNames(dnsNames, wildcardHost) {
+					dnsNames = append(dnsNames, wildcardHost)
+				}
+			}
+		} else {
+			dnsNames = append(dnsNames, topHost, wildcardHost)
+		}
+
+		key = "+." + topHost
+	}
+
+	serial := atomic.AddInt64(&currentSerialNumber, 1)
+
+	tmpl := &x509.Certificate{
+		SerialNumber: big.NewInt(serial),
+		Subject: pkix.Name{
+			CommonName:   topHost,
+			Organization: []string{c.organization},
+		},
+		SubjectKeyId:          c.keyID,
+		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
+		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+		BasicConstraintsValid: true,
+		NotBefore:             time.Now().Add(-c.validity),
+		NotAfter:              time.Now().Add(c.validity),
+		DNSNames:              dnsNames,
+		IPAddresses:           ips,
+	}
+
+	raw, err := x509.CreateCertificate(rand.Reader, tmpl, c.ca, c.privateKey.Public(), c.caPrivateKey)
+	if err != nil {
+		return nil, err
+	}
+
+	x509c, err := x509.ParseCertificate(raw)
+	if err != nil {
+		return nil, err
+	}
+
+	tlsCertificate = &tls.Certificate{
+		Certificate: [][]byte{raw, c.ca.Raw},
+		PrivateKey:  c.privateKey,
+		Leaf:        x509c,
+	}
+
+	c.certsStorage.Set(key, tlsCertificate)
+	return tlsCertificate, nil
+}
+
+// GenerateAndSave generate CA private key and CA certificate and dump them to file
+func GenerateAndSave(caPath string, caKeyPath string) error {
+	privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		return err
+	}
+
+	tmpl := &x509.Certificate{
+		SerialNumber: big.NewInt(time.Now().Unix()),
+		Subject: pkix.Name{
+			Country:      []string{"US"},
+			CommonName:   "Clash Root CA",
+			Organization: []string{"Clash Trust Services"},
+		},
+		KeyUsage:              x509.KeyUsageCertSign | x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
+		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+		NotBefore:             time.Now().Add(-(time.Hour * 24 * 60)),
+		NotAfter:              time.Now().Add(time.Hour * 24 * 365 * 25),
+		BasicConstraintsValid: true,
+		IsCA:                  true,
+	}
+
+	caRaw, err := x509.CreateCertificate(rand.Reader, tmpl, tmpl, privateKey.Public(), privateKey)
+	if err != nil {
+		return err
+	}
+
+	caOut, err := os.OpenFile(caPath, os.O_CREATE|os.O_WRONLY, 0o600)
+	if err != nil {
+		return err
+	}
+	defer func(caOut *os.File) {
+		_ = caOut.Close()
+	}(caOut)
+
+	if err = pem.Encode(caOut, &pem.Block{Type: "CERTIFICATE", Bytes: caRaw}); err != nil {
+		return err
+	}
+
+	caKeyOut, err := os.OpenFile(caKeyPath, os.O_CREATE|os.O_WRONLY, 0o600)
+	if err != nil {
+		return err
+	}
+	defer func(caKeyOut *os.File) {
+		_ = caKeyOut.Close()
+	}(caKeyOut)
+
+	if err = pem.Encode(caKeyOut, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(privateKey)}); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func hasDnsNames(dnsNames []string, hostname string) bool {
+	for _, name := range dnsNames {
+		if name == hostname {
+			return true
+		}
+	}
+	return false
+}

common/cert/cert_test.go

@@ -0,0 +1,104 @@
+package cert
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"net"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCert(t *testing.T) {
+	ca, privateKey, err := NewAuthority("Clash ca", "Clash", 24*time.Hour)
+
+	assert.Nil(t, err)
+	assert.NotNil(t, ca)
+	assert.NotNil(t, privateKey)
+
+	c, err := NewConfig(ca, privateKey)
+	assert.Nil(t, err)
+
+	c.SetValidity(20 * time.Hour)
+	c.SetOrganization("Test Organization")
+
+	conf := c.NewTLSConfigForHost("example.org")
+	assert.Equal(t, []string{"http/1.1"}, conf.NextProtos)
+	assert.True(t, conf.InsecureSkipVerify)
+
+	// Test generating a certificate
+	clientHello := &tls.ClientHelloInfo{
+		ServerName: "example.org",
+	}
+	tlsCert, err := conf.GetCertificate(clientHello)
+	assert.Nil(t, err)
+	assert.NotNil(t, tlsCert)
+
+	// Assert certificate details
+	x509c := tlsCert.Leaf
+	assert.Equal(t, "example.org", x509c.Subject.CommonName)
+	assert.Nil(t, x509c.VerifyHostname("example.org"))
+	assert.Nil(t, x509c.VerifyHostname("abc.example.org"))
+	assert.Equal(t, []string{"Test Organization"}, x509c.Subject.Organization)
+	assert.NotNil(t, x509c.SubjectKeyId)
+	assert.True(t, x509c.BasicConstraintsValid)
+	assert.True(t, x509c.KeyUsage&x509.KeyUsageKeyEncipherment == x509.KeyUsageKeyEncipherment)
+	assert.True(t, x509c.KeyUsage&x509.KeyUsageDigitalSignature == x509.KeyUsageDigitalSignature)
+	assert.Equal(t, []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth}, x509c.ExtKeyUsage)
+	assert.Equal(t, []string{"example.org", "*.example.org"}, x509c.DNSNames)
+	assert.True(t, x509c.NotBefore.Before(time.Now().Add(-2*time.Hour)))
+	assert.True(t, x509c.NotAfter.After(time.Now().Add(2*time.Hour)))
+
+	// Check that certificate is cached
+	tlsCert2, err := c.GetOrCreateCert("abc.example.org")
+	assert.Nil(t, err)
+	assert.True(t, tlsCert == tlsCert2)
+
+	// Check that certificate is new
+	_, _ = c.GetOrCreateCert("a.b.c.d.e.f.g.h.i.j.example.org")
+	tlsCert3, err := c.GetOrCreateCert("m.k.l.example.org")
+	x509c = tlsCert3.Leaf
+	assert.Nil(t, err)
+	assert.False(t, tlsCert == tlsCert3)
+	assert.Equal(t, []string{"example.org", "*.example.org", "*.j.example.org", "*.i.j.example.org", "*.h.i.j.example.org", "*.g.h.i.j.example.org", "*.f.g.h.i.j.example.org", "*.e.f.g.h.i.j.example.org", "*.d.e.f.g.h.i.j.example.org", "*.c.d.e.f.g.h.i.j.example.org", "*.b.c.d.e.f.g.h.i.j.example.org", "*.l.example.org", "*.k.l.example.org"}, x509c.DNSNames)
+
+	// Check that certificate is cached
+	tlsCert4, err := c.GetOrCreateCert("xyz.example.org")
+	x509c = tlsCert4.Leaf
+	assert.Nil(t, err)
+	assert.True(t, tlsCert3 == tlsCert4)
+	assert.Nil(t, x509c.VerifyHostname("example.org"))
+	assert.Nil(t, x509c.VerifyHostname("jkf.example.org"))
+	assert.Nil(t, x509c.VerifyHostname("n.j.example.org"))
+	assert.Nil(t, x509c.VerifyHostname("c.i.j.example.org"))
+	assert.Nil(t, x509c.VerifyHostname("m.l.example.org"))
+	assert.Error(t, x509c.VerifyHostname("m.l.jkf.example.org"))
+
+	// Check the certificate for an IP
+	tlsCertForIP, err := c.GetOrCreateCert("192.168.0.1")
+	x509c = tlsCertForIP.Leaf
+	assert.Nil(t, err)
+	assert.Equal(t, 1, len(x509c.IPAddresses))
+	assert.True(t, net.ParseIP("192.168.0.1").Equal(x509c.IPAddresses[0]))
+
+	// Check that certificate is cached
+	tlsCertForIP2, err := c.GetOrCreateCert("192.168.0.1")
+	x509c = tlsCertForIP2.Leaf
+	assert.Nil(t, err)
+	assert.True(t, tlsCertForIP == tlsCertForIP2)
+	assert.Nil(t, x509c.VerifyHostname("192.168.0.1"))
+}
+
+func TestGenerateAndSave(t *testing.T) {
+	caPath := "ca.crt"
+	caKeyPath := "ca.key"
+
+	err := GenerateAndSave(caPath, caKeyPath)
+
+	assert.Nil(t, err)
+
+	_ = os.Remove(caPath)
+	_ = os.Remove(caKeyPath)
+}

common/cert/storage.go

@@ -0,0 +1,32 @@
+package cert
+
+import (
+	"crypto/tls"
+
+	"github.com/Dreamacro/clash/component/trie"
+)
+
+// DomainTrieCertsStorage cache wildcard certificates
+type DomainTrieCertsStorage struct {
+	certsCache *trie.DomainTrie[*tls.Certificate]
+}
+
+// Get gets the certificate from the storage
+func (c *DomainTrieCertsStorage) Get(key string) (*tls.Certificate, bool) {
+	ca := c.certsCache.Search(key)
+	if ca == nil {
+		return nil, false
+	}
+	return ca.Data, true
+}
+
+// Set saves the certificate to the storage
+func (c *DomainTrieCertsStorage) Set(key string, cert *tls.Certificate) {
+	_ = c.certsCache.Insert(key, cert)
+}
+
+func NewDomainTrieCertsStorage() *DomainTrieCertsStorage {
+	return &DomainTrieCertsStorage{
+		certsCache: trie.New[*tls.Certificate](),
+	}
+}

common/cmd/cmd.go

@@ -0,0 +1,35 @@
+package cmd
+
+import (
+	"fmt"
+	"os/exec"
+	"strings"
+)
+
+func ExecCmd(cmdStr string) (string, error) {
+	args := splitArgs(cmdStr)
+
+	var cmd *exec.Cmd
+	if len(args) == 1 {
+		cmd = exec.Command(args[0])
+	} else {
+		cmd = exec.Command(args[0], args[1:]...)
+	}
+
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		return "", fmt.Errorf("%v, %s", err, string(out))
+	}
+	return string(out), nil
+}
+
+func splitArgs(cmd string) []string {
+	args := strings.Split(cmd, " ")
+
+	// use in pipeline
+	if len(args) > 2 && strings.ContainsAny(cmd, "|") {
+		suffix := strings.Join(args[2:], " ")
+		args = append(args[:2], suffix)
+	}
+	return args
+}

common/cmd/cmd_test.go

@@ -0,0 +1,40 @@
+package cmd
+
+import (
+	"runtime"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSplitArgs(t *testing.T) {
+	args := splitArgs("ls")
+	args1 := splitArgs("ls -la")
+	args2 := splitArgs("bash -c ls")
+	args3 := splitArgs("bash -c ls -lahF | grep 'cmd'")
+
+	assert.Equal(t, 1, len(args))
+	assert.Equal(t, 2, len(args1))
+	assert.Equal(t, 3, len(args2))
+	assert.Equal(t, 3, len(args3))
+}
+
+func TestExecCmd(t *testing.T) {
+	if runtime.GOOS == "windows" {
+		_, err := ExecCmd("dir")
+		assert.Nil(t, err)
+		return
+	}
+
+	_, err := ExecCmd("ls")
+	_, err1 := ExecCmd("ls -la")
+	_, err2 := ExecCmd("bash -c ls")
+	_, err3 := ExecCmd("bash -c ls -la")
+	_, err4 := ExecCmd("bash -c ls -la | grep 'cmd'")
+
+	assert.Nil(t, err)
+	assert.Nil(t, err1)
+	assert.Nil(t, err2)
+	assert.Nil(t, err3)
+	assert.Nil(t, err4)
+}

common/generics/list/list.go

@@ -0,0 +1,235 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package list implements a doubly linked list.
+//
+// To iterate over a list (where l is a *List):
+//	for e := l.Front(); e != nil; e = e.Next() {
+//		// do something with e.Value
+//	}
+//
+package list
+
+// Element is an element of a linked list.
+type Element[T any] struct {
+	// Next and previous pointers in the doubly-linked list of elements.
+	// To simplify the implementation, internally a list l is implemented
+	// as a ring, such that &l.root is both the next element of the last
+	// list element (l.Back()) and the previous element of the first list
+	// element (l.Front()).
+	next, prev *Element[T]
+
+	// The list to which this element belongs.
+	list *List[T]
+
+	// The value stored with this element.
+	Value T
+}
+
+// Next returns the next list element or nil.
+func (e *Element[T]) Next() *Element[T] {
+	if p := e.next; e.list != nil && p != &e.list.root {
+		return p
+	}
+	return nil
+}
+
+// Prev returns the previous list element or nil.
+func (e *Element[T]) Prev() *Element[T] {
+	if p := e.prev; e.list != nil && p != &e.list.root {
+		return p
+	}
+	return nil
+}
+
+// List represents a doubly linked list.
+// The zero value for List is an empty list ready to use.
+type List[T any] struct {
+	root Element[T] // sentinel list element, only &root, root.prev, and root.next are used
+	len  int        // current list length excluding (this) sentinel element
+}
+
+// Init initializes or clears list l.
+func (l *List[T]) Init() *List[T] {
+	l.root.next = &l.root
+	l.root.prev = &l.root
+	l.len = 0
+	return l
+}
+
+// New returns an initialized list.
+func New[T any]() *List[T] { return new(List[T]).Init() }
+
+// Len returns the number of elements of list l.
+// The complexity is O(1).
+func (l *List[T]) Len() int { return l.len }
+
+// Front returns the first element of list l or nil if the list is empty.
+func (l *List[T]) Front() *Element[T] {
+	if l.len == 0 {
+		return nil
+	}
+	return l.root.next
+}
+
+// Back returns the last element of list l or nil if the list is empty.
+func (l *List[T]) Back() *Element[T] {
+	if l.len == 0 {
+		return nil
+	}
+	return l.root.prev
+}
+
+// lazyInit lazily initializes a zero List value.
+func (l *List[T]) lazyInit() {
+	if l.root.next == nil {
+		l.Init()
+	}
+}
+
+// insert inserts e after at, increments l.len, and returns e.
+func (l *List[T]) insert(e, at *Element[T]) *Element[T] {
+	e.prev = at
+	e.next = at.next
+	e.prev.next = e
+	e.next.prev = e
+	e.list = l
+	l.len++
+	return e
+}
+
+// insertValue is a convenience wrapper for insert(&Element{Value: v}, at).
+func (l *List[T]) insertValue(v T, at *Element[T]) *Element[T] {
+	return l.insert(&Element[T]{Value: v}, at)
+}
+
+// remove removes e from its list, decrements l.len
+func (l *List[T]) remove(e *Element[T]) {
+	e.prev.next = e.next
+	e.next.prev = e.prev
+	e.next = nil // avoid memory leaks
+	e.prev = nil // avoid memory leaks
+	e.list = nil
+	l.len--
+}
+
+// move moves e to next to at.
+func (l *List[T]) move(e, at *Element[T]) {
+	if e == at {
+		return
+	}
+	e.prev.next = e.next
+	e.next.prev = e.prev
+
+	e.prev = at
+	e.next = at.next
+	e.prev.next = e
+	e.next.prev = e
+}
+
+// Remove removes e from l if e is an element of list l.
+// It returns the element value e.Value.
+// The element must not be nil.
+func (l *List[T]) Remove(e *Element[T]) T {
+	if e.list == l {
+		// if e.list == l, l must have been initialized when e was inserted
+		// in l or l == nil (e is a zero Element) and l.remove will crash
+		l.remove(e)
+	}
+	return e.Value
+}
+
+// PushFront inserts a new element e with value v at the front of list l and returns e.
+func (l *List[T]) PushFront(v T) *Element[T] {
+	l.lazyInit()
+	return l.insertValue(v, &l.root)
+}
+
+// PushBack inserts a new element e with value v at the back of list l and returns e.
+func (l *List[T]) PushBack(v T) *Element[T] {
+	l.lazyInit()
+	return l.insertValue(v, l.root.prev)
+}
+
+// InsertBefore inserts a new element e with value v immediately before mark and returns e.
+// If mark is not an element of l, the list is not modified.
+// The mark must not be nil.
+func (l *List[T]) InsertBefore(v T, mark *Element[T]) *Element[T] {
+	if mark.list != l {
+		return nil
+	}
+	// see comment in List.Remove about initialization of l
+	return l.insertValue(v, mark.prev)
+}
+
+// InsertAfter inserts a new element e with value v immediately after mark and returns e.
+// If mark is not an element of l, the list is not modified.
+// The mark must not be nil.
+func (l *List[T]) InsertAfter(v T, mark *Element[T]) *Element[T] {
+	if mark.list != l {
+		return nil
+	}
+	// see comment in List.Remove about initialization of l
+	return l.insertValue(v, mark)
+}
+
+// MoveToFront moves element e to the front of list l.
+// If e is not an element of l, the list is not modified.
+// The element must not be nil.
+func (l *List[T]) MoveToFront(e *Element[T]) {
+	if e.list != l || l.root.next == e {
+		return
+	}
+	// see comment in List.Remove about initialization of l
+	l.move(e, &l.root)
+}
+
+// MoveToBack moves element e to the back of list l.
+// If e is not an element of l, the list is not modified.
+// The element must not be nil.
+func (l *List[T]) MoveToBack(e *Element[T]) {
+	if e.list != l || l.root.prev == e {
+		return
+	}
+	// see comment in List.Remove about initialization of l
+	l.move(e, l.root.prev)
+}
+
+// MoveBefore moves element e to its new position before mark.
+// If e or mark is not an element of l, or e == mark, the list is not modified.
+// The element and mark must not be nil.
+func (l *List[T]) MoveBefore(e, mark *Element[T]) {
+	if e.list != l || e == mark || mark.list != l {
+		return
+	}
+	l.move(e, mark.prev)
+}
+
+// MoveAfter moves element e to its new position after mark.
+// If e or mark is not an element of l, or e == mark, the list is not modified.
+// The element and mark must not be nil.
+func (l *List[T]) MoveAfter(e, mark *Element[T]) {
+	if e.list != l || e == mark || mark.list != l {
+		return
+	}
+	l.move(e, mark)
+}
+
+// PushBackList inserts a copy of another list at the back of list l.
+// The lists l and other may be the same. They must not be nil.
+func (l *List[T]) PushBackList(other *List[T]) {
+	l.lazyInit()
+	for i, e := other.Len(), other.Front(); i > 0; i, e = i-1, e.Next() {
+		l.insertValue(e.Value, l.root.prev)
+	}
+}
+
+// PushFrontList inserts a copy of another list at the front of list l.
+// The lists l and other may be the same. They must not be nil.
+func (l *List[T]) PushFrontList(other *List[T]) {
+	l.lazyInit()
+	for i, e := other.Len(), other.Back(); i > 0; i, e = i-1, e.Prev() {
+		l.insertValue(e.Value, &l.root)
+	}
+}

common/murmur3/murmur32.go

@@ -4,6 +4,7 @@ package murmur3
 
 import (
 	"hash"
+	"math/bits"
 	"unsafe"
 )
 
@@ -54,11 +55,11 @@ func (d *digest32) bmix(p []byte) (tail []byte) {
 		k1 := *(*uint32)(unsafe.Pointer(&p[i*4]))
 
 		k1 *= c1_32
-		k1 = (k1 << 15) | (k1 >> 17) // rotl32(k1, 15)
+		k1 = bits.RotateLeft32(k1, 15)
 		k1 *= c2_32
 
 		h1 ^= k1
-		h1 = (h1 << 13) | (h1 >> 19) // rotl32(h1, 13)
+		h1 = bits.RotateLeft32(h1, 13)
 		h1 = h1*4 + h1 + 0xe6546b64
 	}
 	d.h1 = h1
@@ -66,7 +67,6 @@ func (d *digest32) bmix(p []byte) (tail []byte) {
 }
 
 func (d *digest32) Sum32() (h1 uint32) {
-
 	h1 = d.h1
 
 	var k1 uint32
@@ -80,7 +80,7 @@ func (d *digest32) Sum32() (h1 uint32) {
 	case 1:
 		k1 ^= uint32(d.tail[0])
 		k1 *= c1_32
-		k1 = (k1 << 15) | (k1 >> 17) // rotl32(k1, 15)
+		k1 = bits.RotateLeft32(k1, 15)
 		k1 *= c2_32
 		h1 ^= k1
 	}
@@ -102,20 +102,15 @@ func Sum32WithSeed(data []byte, seed uint32) uint32 {
 	h1 := seed
 
 	nblocks := len(data) / 4
-	var p uintptr
+	for i := 0; i < nblocks; i++ {
-	if len(data) > 0 {
+		k1 := *(*uint32)(unsafe.Pointer(&data[i*4]))
-		p = uintptr(unsafe.Pointer(&data[0]))
-	}
-	p1 := p + uintptr(4*nblocks)
-	for ; p < p1; p += 4 {
-		k1 := *(*uint32)(unsafe.Pointer(p))
 
 		k1 *= c1_32
-		k1 = (k1 << 15) | (k1 >> 17) // rotl32(k1, 15)
+		k1 = bits.RotateLeft32(k1, 15)
 		k1 *= c2_32
 
 		h1 ^= k1
-		h1 = (h1 << 13) | (h1 >> 19) // rotl32(h1, 13)
+		h1 = bits.RotateLeft32(h1, 13)
 		h1 = h1*4 + h1 + 0xe6546b64
 	}
 
@@ -132,7 +127,7 @@ func Sum32WithSeed(data []byte, seed uint32) uint32 {
 	case 1:
 		k1 ^= uint32(tail[0])
 		k1 *= c1_32
-		k1 = (k1 << 15) | (k1 >> 17) // rotl32(k1, 15)
+		k1 = bits.RotateLeft32(k1, 15)
 		k1 *= c2_32
 		h1 ^= k1
 	}

common/net/bufconn.go

@@ -0,0 +1,44 @@
+package net
+
+import (
+	"bufio"
+	"net"
+)
+
+type BufferedConn struct {
+	r *bufio.Reader
+	net.Conn
+}
+
+func NewBufferedConn(c net.Conn) *BufferedConn {
+	if bc, ok := c.(*BufferedConn); ok {
+		return bc
+	}
+	return &BufferedConn{bufio.NewReader(c), c}
+}
+
+// Reader returns the internal bufio.Reader.
+func (c *BufferedConn) Reader() *bufio.Reader {
+	return c.r
+}
+
+// Peek returns the next n bytes without advancing the reader.
+func (c *BufferedConn) Peek(n int) ([]byte, error) {
+	return c.r.Peek(n)
+}
+
+func (c *BufferedConn) Read(p []byte) (int, error) {
+	return c.r.Read(p)
+}
+
+func (c *BufferedConn) ReadByte() (byte, error) {
+	return c.r.ReadByte()
+}
+
+func (c *BufferedConn) UnreadByte() error {
+	return c.r.UnreadByte()
+}
+
+func (c *BufferedConn) Buffered() int {
+	return c.r.Buffered()
+}

common/net/io.go

@@ -0,0 +1,11 @@
+package net
+
+import "io"
+
+type ReadOnlyReader struct {
+	io.Reader
+}
+
+type WriteOnlyWriter struct {
+	io.Writer
+}

common/net/relay.go

@@ -0,0 +1,39 @@
+package net
+
+import (
+	"io"
+	"net"
+	"time"
+
+	"github.com/Dreamacro/clash/common/pool"
+)
+
+// Relay copies between left and right bidirectionally.
+func Relay(leftConn, rightConn net.Conn) {
+	ch := make(chan error)
+
+	tcpKeepAlive(leftConn)
+	tcpKeepAlive(rightConn)
+
+	go func() {
+		buf := pool.Get(pool.RelayBufferSize)
+		// Wrapping to avoid using *net.TCPConn.(ReadFrom)
+		// See also https://github.com/Dreamacro/clash/pull/1209
+		_, err := io.CopyBuffer(WriteOnlyWriter{Writer: leftConn}, ReadOnlyReader{Reader: rightConn}, buf)
+		_ = pool.Put(buf)
+		_ = leftConn.SetReadDeadline(time.Now())
+		ch <- err
+	}()
+
+	buf := pool.Get(pool.RelayBufferSize)
+	_, _ = io.CopyBuffer(WriteOnlyWriter{Writer: rightConn}, ReadOnlyReader{Reader: leftConn}, buf)
+	_ = pool.Put(buf)
+	_ = rightConn.SetReadDeadline(time.Now())
+	<-ch
+}
+
+func tcpKeepAlive(c net.Conn) {
+	if tcp, ok := c.(*net.TCPConn); ok {
+		_ = tcp.SetKeepAlive(true)
+	}
+}

common/nnip/netip.go

@@ -0,0 +1,53 @@
+package nnip
+
+import (
+	"encoding/binary"
+	"net"
+	"net/netip"
+)
+
+// IpToAddr converts the net.IP to netip.Addr.
+// If slice's length is not 4 or 16, IpToAddr returns netip.Addr{}
+func IpToAddr(slice net.IP) netip.Addr {
+	ip := slice
+	if len(ip) != 4 {
+		if ip = slice.To4(); ip == nil {
+			ip = slice
+		}
+	}
+
+	if addr, ok := netip.AddrFromSlice(ip); ok {
+		return addr
+	}
+	return netip.Addr{}
+}
+
+// UnMasked returns p's last IP address.
+// If p is invalid, UnMasked returns netip.Addr{}
+func UnMasked(p netip.Prefix) netip.Addr {
+	if !p.IsValid() {
+		return netip.Addr{}
+	}
+
+	buf := p.Addr().As16()
+
+	hi := binary.BigEndian.Uint64(buf[:8])
+	lo := binary.BigEndian.Uint64(buf[8:])
+
+	bits := p.Bits()
+	if bits <= 32 {
+		bits += 96
+	}
+
+	hi = hi | ^uint64(0)>>bits
+	lo = lo | ^(^uint64(0) << (128 - bits))
+
+	binary.BigEndian.PutUint64(buf[:8], hi)
+	binary.BigEndian.PutUint64(buf[8:], lo)
+
+	addr := netip.AddrFrom16(buf)
+	if p.Addr().Is4() {
+		return addr.Unmap()
+	}
+	return addr
+}

common/observable/iterable.go

@@ -1,3 +1,3 @@
 package observable
 
-type Iterable <-chan interface{}
+type Iterable[T any] <-chan T

common/observable/observable.go

@@ -5,62 +5,60 @@ import (
 	"sync"
 )
 
-type Observable struct {
+type Observable[T any] struct {
-	iterable Iterable
+	iterable Iterable[T]
-	listener *sync.Map
+	listener map[Subscription[T]]*Subscriber[T]
+	mux      sync.Mutex
 	done     bool
-	doneLock sync.RWMutex
 }
 
-func (o *Observable) process() {
+func (o *Observable[T]) process() {
 	for item := range o.iterable {
-		o.listener.Range(func(key, value interface{}) bool {
+		o.mux.Lock()
-			elm := value.(*Subscriber)
+		for _, sub := range o.listener {
-			elm.Emit(item)
+			sub.Emit(item)
-			return true
+		}
-		})
+		o.mux.Unlock()
 	}
 	o.close()
 }
 
-func (o *Observable) close() {
+func (o *Observable[T]) close() {
-	o.doneLock.Lock()
+	o.mux.Lock()
-	o.done = true
+	defer o.mux.Unlock()
-	o.doneLock.Unlock()
 
-	o.listener.Range(func(key, value interface{}) bool {
+	o.done = true
-		elm := value.(*Subscriber)
+	for _, sub := range o.listener {
-		elm.Close()
+		sub.Close()
-		return true
+	}
-	})
 }
 
-func (o *Observable) Subscribe() (Subscription, error) {
+func (o *Observable[T]) Subscribe() (Subscription[T], error) {
-	o.doneLock.RLock()
+	o.mux.Lock()
-	done := o.done
+	defer o.mux.Unlock()
-	o.doneLock.RUnlock()
+	if o.done {
-	if done == true {
+		return nil, errors.New("observable is closed")
-		return nil, errors.New("Observable is closed")
 	}
-	subscriber := newSubscriber()
+	subscriber := newSubscriber[T]()
-	o.listener.Store(subscriber.Out(), subscriber)
+	o.listener[subscriber.Out()] = subscriber
 	return subscriber.Out(), nil
 }
 
-func (o *Observable) UnSubscribe(sub Subscription) {
+func (o *Observable[T]) UnSubscribe(sub Subscription[T]) {
-	elm, exist := o.listener.Load(sub)
+	o.mux.Lock()
+	defer o.mux.Unlock()
+	subscriber, exist := o.listener[sub]
 	if !exist {
 		return
 	}
-	subscriber := elm.(*Subscriber)
+	delete(o.listener, sub)
-	o.listener.Delete(subscriber.Out())
 	subscriber.Close()
 }
 
-func NewObservable(any Iterable) *Observable {
+func NewObservable[T any](iter Iterable[T]) *Observable[T] {
-	observable := &Observable{
+	observable := &Observable[T]{
-		iterable: any,
+		iterable: iter,
-		listener: &sync.Map{},
+		listener: map[Subscription[T]]*Subscriber[T]{},
 	}
 	go observable.process()
 	return observable

common/observable/observable_test.go

@@ -1,14 +1,16 @@
 package observable
 
 import (
-	"runtime"
 	"sync"
 	"testing"
 	"time"
+
+	"github.com/stretchr/testify/assert"
+	"go.uber.org/atomic"
 )
 
-func iterator(item []interface{}) chan interface{} {
+func iterator[T any](item []T) chan T {
-	ch := make(chan interface{})
+	ch := make(chan T)
 	go func() {
 		time.Sleep(100 * time.Millisecond)
 		for _, elm := range item {
@@ -20,86 +22,71 @@ func iterator(item []interface{}) chan interface{} {
 }
 
 func TestObservable(t *testing.T) {
-	iter := iterator([]interface{}{1, 2, 3, 4, 5})
+	iter := iterator[int]([]int{1, 2, 3, 4, 5})
-	src := NewObservable(iter)
+	src := NewObservable[int](iter)
 	data, err := src.Subscribe()
-	if err != nil {
+	assert.Nil(t, err)
-		t.Error(err)
-	}
 	count := 0
 	for range data {
-		count = count + 1
+		count++
-	}
-	if count != 5 {
-		t.Error("Revc number error")
 	}
+	assert.Equal(t, count, 5)
 }
 
-func TestObservable_MutilSubscribe(t *testing.T) {
+func TestObservable_MultiSubscribe(t *testing.T) {
-	iter := iterator([]interface{}{1, 2, 3, 4, 5})
+	iter := iterator[int]([]int{1, 2, 3, 4, 5})
-	src := NewObservable(iter)
+	src := NewObservable[int](iter)
 	ch1, _ := src.Subscribe()
 	ch2, _ := src.Subscribe()
-	count := 0
+	count := atomic.NewInt32(0)
 
 	var wg sync.WaitGroup
 	wg.Add(2)
-	waitCh := func(ch <-chan interface{}) {
+	waitCh := func(ch <-chan int) {
 		for range ch {
-			count = count + 1
+			count.Inc()
 		}
 		wg.Done()
 	}
 	go waitCh(ch1)
 	go waitCh(ch2)
 	wg.Wait()
-	if count != 10 {
+	assert.Equal(t, int32(10), count.Load())
-		t.Error("Revc number error")
-	}
 }
 
 func TestObservable_UnSubscribe(t *testing.T) {
-	iter := iterator([]interface{}{1, 2, 3, 4, 5})
+	iter := iterator[int]([]int{1, 2, 3, 4, 5})
-	src := NewObservable(iter)
+	src := NewObservable[int](iter)
 	data, err := src.Subscribe()
-	if err != nil {
+	assert.Nil(t, err)
-		t.Error(err)
-	}
 	src.UnSubscribe(data)
 	_, open := <-data
-	if open {
+	assert.False(t, open)
-		t.Error("Revc number error")
-	}
 }
 
 func TestObservable_SubscribeClosedSource(t *testing.T) {
-	iter := iterator([]interface{}{1})
+	iter := iterator[int]([]int{1})
-	src := NewObservable(iter)
+	src := NewObservable[int](iter)
 	data, _ := src.Subscribe()
 	<-data
 
 	_, closed := src.Subscribe()
-	if closed == nil {
+	assert.NotNil(t, closed)
-		t.Error("Observable should be closed")
-	}
 }
 
 func TestObservable_UnSubscribeWithNotExistSubscription(t *testing.T) {
-	sub := Subscription(make(chan interface{}))
+	sub := Subscription[int](make(chan int))
-	iter := iterator([]interface{}{1})
+	iter := iterator[int]([]int{1})
-	src := NewObservable(iter)
+	src := NewObservable[int](iter)
 	src.UnSubscribe(sub)
 }
 
 func TestObservable_SubscribeGoroutineLeak(t *testing.T) {
-	// waiting for other goroutine recycle
+	iter := iterator[int]([]int{1, 2, 3, 4, 5})
-	time.Sleep(120 * time.Millisecond)
+	src := NewObservable[int](iter)
-	init := runtime.NumGoroutine()
-	iter := iterator([]interface{}{1, 2, 3, 4, 5})
-	src := NewObservable(iter)
 	max := 100
 
-	var list []Subscription
+	var list []Subscription[int]
 	for i := 0; i < max; i++ {
 		ch, _ := src.Subscribe()
 		list = append(list, ch)
@@ -107,7 +94,7 @@ func TestObservable_SubscribeGoroutineLeak(t *testing.T) {
 
 	var wg sync.WaitGroup
 	wg.Add(max)
-	waitCh := func(ch <-chan interface{}) {
+	waitCh := func(ch <-chan int) {
 		for range ch {
 		}
 		wg.Done()
@@ -117,8 +104,43 @@ func TestObservable_SubscribeGoroutineLeak(t *testing.T) {
 		go waitCh(ch)
 	}
 	wg.Wait()
-	now := runtime.NumGoroutine()
+
-	if init != now {
+	for _, sub := range list {
-		t.Errorf("Goroutine Leak: init %d now %d", init, now)
+		_, more := <-sub
+		assert.False(t, more)
 	}
+
+	_, more := <-list[0]
+	assert.False(t, more)
+}
+
+func Benchmark_Observable_1000(b *testing.B) {
+	ch := make(chan int)
+	o := NewObservable[int](ch)
+	num := 1000
+
+	subs := []Subscription[int]{}
+	for i := 0; i < num; i++ {
+		sub, _ := o.Subscribe()
+		subs = append(subs, sub)
+	}
+
+	wg := sync.WaitGroup{}
+	wg.Add(num)
+
+	b.ResetTimer()
+	for _, sub := range subs {
+		go func(s Subscription[int]) {
+			for range s {
+			}
+			wg.Done()
+		}(sub)
+	}
+
+	for i := 0; i < b.N; i++ {
+		ch <- i
+	}
+
+	close(ch)
+	wg.Wait()
 }

common/observable/subscriber.go

@@ -2,34 +2,32 @@ package observable
 
 import (
 	"sync"
-
-	"gopkg.in/eapache/channels.v1"
 )
 
-type Subscription <-chan interface{}
+type Subscription[T any] <-chan T
 
-type Subscriber struct {
+type Subscriber[T any] struct {
-	buffer *channels.InfiniteChannel
+	buffer chan T
 	once   sync.Once
 }
 
-func (s *Subscriber) Emit(item interface{}) {
+func (s *Subscriber[T]) Emit(item T) {
-	s.buffer.In() <- item
+	s.buffer <- item
 }
 
-func (s *Subscriber) Out() Subscription {
+func (s *Subscriber[T]) Out() Subscription[T] {
-	return s.buffer.Out()
+	return s.buffer
 }
 
-func (s *Subscriber) Close() {
+func (s *Subscriber[T]) Close() {
 	s.once.Do(func() {
-		s.buffer.Close()
+		close(s.buffer)
 	})
 }
 
-func newSubscriber() *Subscriber {
+func newSubscriber[T any]() *Subscriber[T] {
-	sub := &Subscriber{
+	sub := &Subscriber[T]{
-		buffer: channels.NewInfiniteChannel(),
+		buffer: make(chan T, 200),
 	}
 	return sub
 }

common/picker/picker.go

@@ -1,22 +1,80 @@
 package picker
 
-import "context"
+import (
+	"context"
+	"sync"
+	"time"
+)
+
+// Picker provides synchronization, and Context cancelation
+// for groups of goroutines working on subtasks of a common task.
+// Inspired by errGroup
+type Picker[T any] struct {
+	ctx    context.Context
+	cancel func()
+
+	wg sync.WaitGroup
+
+	once    sync.Once
+	errOnce sync.Once
+	result  T
+	err     error
+}
+
+func newPicker[T any](ctx context.Context, cancel func()) *Picker[T] {
+	return &Picker[T]{
+		ctx:    ctx,
+		cancel: cancel,
+	}
+}
+
+// WithContext returns a new Picker and an associated Context derived from ctx.
+// and cancel when first element return.
+func WithContext[T any](ctx context.Context) (*Picker[T], context.Context) {
+	ctx, cancel := context.WithCancel(ctx)
+	return newPicker[T](ctx, cancel), ctx
+}
+
+// WithTimeout returns a new Picker and an associated Context derived from ctx with timeout.
+func WithTimeout[T any](ctx context.Context, timeout time.Duration) (*Picker[T], context.Context) {
+	ctx, cancel := context.WithTimeout(ctx, timeout)
+	return newPicker[T](ctx, cancel), ctx
+}
+
+// Wait blocks until all function calls from the Go method have returned,
+// then returns the first nil error result (if any) from them.
+func (p *Picker[T]) Wait() T {
+	p.wg.Wait()
+	if p.cancel != nil {
+		p.cancel()
+	}
+	return p.result
+}
+
+// Error return the first error (if all success return nil)
+func (p *Picker[T]) Error() error {
+	return p.err
+}
+
+// Go calls the given function in a new goroutine.
+// The first call to return a nil error cancels the group; its result will be returned by Wait.
+func (p *Picker[T]) Go(f func() (T, error)) {
+	p.wg.Add(1)
 
-func SelectFast(ctx context.Context, in <-chan interface{}) <-chan interface{} {
-	out := make(chan interface{})
 	go func() {
-		select {
+		defer p.wg.Done()
-		case p, open := <-in:
-			if open {
-				out <- p
-			}
-		case <-ctx.Done():
-		}
 
-		close(out)
+		if ret, err := f(); err == nil {
-		for range in {
+			p.once.Do(func() {
+				p.result = ret
+				if p.cancel != nil {
+					p.cancel()
+				}
+			})
+		} else {
+			p.errOnce.Do(func() {
+				p.err = err
+			})
 		}
 	}()
-
-	return out
 }

common/picker/picker_test.go

@@ -4,41 +4,42 @@ import (
 	"context"
 	"testing"
 	"time"
+
+	"github.com/stretchr/testify/assert"
 )
 
-func sleepAndSend(delay int, in chan<- interface{}, input interface{}) {
+func sleepAndSend[T any](ctx context.Context, delay int, input T) func() (T, error) {
-	time.Sleep(time.Millisecond * time.Duration(delay))
+	return func() (T, error) {
-	in <- input
+		timer := time.NewTimer(time.Millisecond * time.Duration(delay))
-}
+		select {
-
+		case <-timer.C:
-func sleepAndClose(delay int, in chan interface{}) {
+			return input, nil
-	time.Sleep(time.Millisecond * time.Duration(delay))
+		case <-ctx.Done():
-	close(in)
+			return getZero[T](), ctx.Err()
+		}
+	}
 }
 
 func TestPicker_Basic(t *testing.T) {
-	in := make(chan interface{})
+	picker, ctx := WithContext[int](context.Background())
-	fast := SelectFast(context.Background(), in)
+	picker.Go(sleepAndSend(ctx, 30, 2))
-	go sleepAndSend(20, in, 1)
+	picker.Go(sleepAndSend(ctx, 20, 1))
-	go sleepAndSend(30, in, 2)
-	go sleepAndClose(40, in)
 
-	number, exist := <-fast
+	number := picker.Wait()
-	if !exist || number != 1 {
+	assert.NotNil(t, number)
-		t.Error("should recv 1", exist, number)
+	assert.Equal(t, number, 1)
-	}
 }
 
 func TestPicker_Timeout(t *testing.T) {
-	in := make(chan interface{})
+	picker, ctx := WithTimeout[int](context.Background(), time.Millisecond*5)
-	ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond*5)
+	picker.Go(sleepAndSend(ctx, 20, 1))
-	defer cancel()
-	fast := SelectFast(ctx, in)
-	go sleepAndSend(20, in, 1)
-	go sleepAndClose(30, in)
 
-	_, exist := <-fast
+	number := picker.Wait()
-	if exist {
+	assert.Equal(t, number, getZero[int]())
-		t.Error("should recv false")
+	assert.NotNil(t, picker.Error())
-	}
+}
+
+func getZero[T any]() T {
+	var result T
+	return result
 }

common/pool/alloc.go

@@ -0,0 +1,64 @@
+package pool
+
+// Inspired by https://github.com/xtaci/smux/blob/master/alloc.go
+
+import (
+	"errors"
+	"math/bits"
+	"sync"
+)
+
+var defaultAllocator = NewAllocator()
+
+// Allocator for incoming frames, optimized to prevent overwriting after zeroing
+type Allocator struct {
+	buffers []sync.Pool
+}
+
+// NewAllocator initiates a []byte allocator for frames less than 65536 bytes,
+// the waste(memory fragmentation) of space allocation is guaranteed to be
+// no more than 50%.
+func NewAllocator() *Allocator {
+	alloc := new(Allocator)
+	alloc.buffers = make([]sync.Pool, 17) // 1B -> 64K
+	for k := range alloc.buffers {
+		i := k
+		alloc.buffers[k].New = func() any {
+			return make([]byte, 1<<uint32(i))
+		}
+	}
+	return alloc
+}
+
+// Get a []byte from pool with most appropriate cap
+func (alloc *Allocator) Get(size int) []byte {
+	if size <= 0 || size > 65536 {
+		return nil
+	}
+
+	bits := msb(size)
+	if size == 1<<bits {
+		return alloc.buffers[bits].Get().([]byte)[:size]
+	}
+
+	return alloc.buffers[bits+1].Get().([]byte)[:size]
+}
+
+// Put returns a []byte to pool for future use,
+// which the cap must be exactly 2^n
+func (alloc *Allocator) Put(buf []byte) error {
+	bits := msb(cap(buf))
+	if cap(buf) == 0 || cap(buf) > 65536 || cap(buf) != 1<<bits {
+		return errors.New("allocator Put() incorrect buffer size")
+	}
+
+	//lint:ignore SA6002 ignore temporarily
+	//nolint
+	alloc.buffers[bits].Put(buf)
+	return nil
+}
+
+// msb return the pos of most significant bit
+func msb(size int) uint16 {
+	return uint16(bits.Len32(uint32(size)) - 1)
+}

common/pool/alloc_test.go

@@ -0,0 +1,48 @@
+package pool
+
+import (
+	"math/rand"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAllocGet(t *testing.T) {
+	alloc := NewAllocator()
+	assert.Nil(t, alloc.Get(0))
+	assert.Equal(t, 1, len(alloc.Get(1)))
+	assert.Equal(t, 2, len(alloc.Get(2)))
+	assert.Equal(t, 3, len(alloc.Get(3)))
+	assert.Equal(t, 4, cap(alloc.Get(3)))
+	assert.Equal(t, 4, cap(alloc.Get(4)))
+	assert.Equal(t, 1023, len(alloc.Get(1023)))
+	assert.Equal(t, 1024, cap(alloc.Get(1023)))
+	assert.Equal(t, 1024, len(alloc.Get(1024)))
+	assert.Equal(t, 65536, len(alloc.Get(65536)))
+	assert.Nil(t, alloc.Get(65537))
+}
+
+func TestAllocPut(t *testing.T) {
+	alloc := NewAllocator()
+	assert.NotNil(t, alloc.Put(nil), "put nil misbehavior")
+	assert.NotNil(t, alloc.Put(make([]byte, 3)), "put elem:3 []bytes misbehavior")
+	assert.Nil(t, alloc.Put(make([]byte, 4)), "put elem:4 []bytes misbehavior")
+	assert.Nil(t, alloc.Put(make([]byte, 1023, 1024)), "put elem:1024 []bytes misbehavior")
+	assert.Nil(t, alloc.Put(make([]byte, 65536)), "put elem:65536 []bytes misbehavior")
+	assert.NotNil(t, alloc.Put(make([]byte, 65537)), "put elem:65537 []bytes misbehavior")
+}
+
+func TestAllocPutThenGet(t *testing.T) {
+	alloc := NewAllocator()
+	data := alloc.Get(4)
+	alloc.Put(data)
+	newData := alloc.Get(4)
+
+	assert.Equal(t, cap(data), cap(newData), "different cap while alloc.Get()")
+}
+
+func BenchmarkMSB(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		msb(rand.Int())
+	}
+}

common/pool/buffer.go

@@ -0,0 +1,17 @@
+package pool
+
+import (
+	"bytes"
+	"sync"
+)
+
+var bufferPool = sync.Pool{New: func() any { return &bytes.Buffer{} }}
+
+func GetBuffer() *bytes.Buffer {
+	return bufferPool.Get().(*bytes.Buffer)
+}
+
+func PutBuffer(buf *bytes.Buffer) {
+	buf.Reset()
+	bufferPool.Put(buf)
+}

common/pool/pool.go

@@ -1,15 +1,21 @@
 package pool
 
-import (
-	"sync"
-)
-
 const (
 	// io.Copy default buffer size is 32 KiB
 	// but the maximum packet size of vmess/shadowsocks is about 16 KiB
 	// so define a buffer of 20 KiB to reduce the memory of each TCP relay
-	bufferSize = 20 * 1024
+	RelayBufferSize = 20 * 1024
+
+	// RelayBufferSize uses 20KiB, but due to the allocator it will actually
+	// request 32Kib. Most UDPs are smaller than the MTU, and the TUN's MTU
+	// set to 9000, so the UDP Buffer size set to 16Kib
+	UDPBufferSize = 16 * 1024
 )
 
-// BufPool provide buffer for relay
+func Get(size int) []byte {
-var BufPool = sync.Pool{New: func() interface{} { return make([]byte, bufferSize) }}
+	return defaultAllocator.Get(size)
+}
+
+func Put(buf []byte) error {
+	return defaultAllocator.Put(buf)
+}

common/queue/queue.go

@@ -5,13 +5,13 @@ import (
 )
 
 // Queue is a simple concurrent safe queue
-type Queue struct {
+type Queue[T any] struct {
-	items []interface{}
+	items []T
 	lock  sync.RWMutex
 }
 
 // Put add the item to the queue.
-func (q *Queue) Put(items ...interface{}) {
+func (q *Queue[T]) Put(items ...T) {
 	if len(items) == 0 {
 		return
 	}
@@ -22,9 +22,9 @@ func (q *Queue) Put(items ...interface{}) {
 }
 
 // Pop returns the head of items.
-func (q *Queue) Pop() interface{} {
+func (q *Queue[T]) Pop() T {
 	if len(q.items) == 0 {
-		return nil
+		return GetZero[T]()
 	}
 
 	q.lock.Lock()
@@ -34,21 +34,21 @@ func (q *Queue) Pop() interface{} {
 	return head
 }
 
-// First returns the head of items without deleting.
+// Last returns the last of item.
-func (q *Queue) First() interface{} {
+func (q *Queue[T]) Last() T {
 	if len(q.items) == 0 {
-		return nil
+		return GetZero[T]()
 	}
 
 	q.lock.RLock()
-	head := q.items[0]
+	last := q.items[len(q.items)-1]
 	q.lock.RUnlock()
-	return head
+	return last
 }
 
 // Copy get the copy of queue.
-func (q *Queue) Copy() []interface{} {
+func (q *Queue[T]) Copy() []T {
-	items := []interface{}{}
+	items := []T{}
 	q.lock.RLock()
 	items = append(items, q.items...)
 	q.lock.RUnlock()
@@ -56,7 +56,7 @@ func (q *Queue) Copy() []interface{} {
 }
 
 // Len returns the number of items in this queue.
-func (q *Queue) Len() int64 {
+func (q *Queue[T]) Len() int64 {
 	q.lock.Lock()
 	defer q.lock.Unlock()
 
@@ -64,8 +64,13 @@ func (q *Queue) Len() int64 {
 }
 
 // New is a constructor for a new concurrent safe queue.
-func New(hint int64) *Queue {
+func New[T any](hint int64) *Queue[T] {
-	return &Queue{
+	return &Queue[T]{
-		items: make([]interface{}, 0, hint),
+		items: make([]T, 0, hint),
 	}
 }
+
+func GetZero[T any]() T {
+	var result T
+	return result
+}

common/singledo/singledo.go

@@ -0,0 +1,64 @@
+package singledo
+
+import (
+	"sync"
+	"time"
+)
+
+type call[T any] struct {
+	wg  sync.WaitGroup
+	val T
+	err error
+}
+
+type Single[T any] struct {
+	mux    sync.Mutex
+	last   time.Time
+	wait   time.Duration
+	call   *call[T]
+	result *Result[T]
+}
+
+type Result[T any] struct {
+	Val T
+	Err error
+}
+
+// Do single.Do likes sync.singleFlight
+//lint:ignore ST1008 it likes sync.singleFlight
+func (s *Single[T]) Do(fn func() (T, error)) (v T, err error, shared bool) {
+	s.mux.Lock()
+	now := time.Now()
+	if now.Before(s.last.Add(s.wait)) {
+		s.mux.Unlock()
+		return s.result.Val, s.result.Err, true
+	}
+
+	if callM := s.call; callM != nil {
+		s.mux.Unlock()
+		callM.wg.Wait()
+		return callM.val, callM.err, true
+	}
+
+	callM := &call[T]{}
+	callM.wg.Add(1)
+	s.call = callM
+	s.mux.Unlock()
+	callM.val, callM.err = fn()
+	callM.wg.Done()
+
+	s.mux.Lock()
+	s.call = nil
+	s.result = &Result[T]{callM.val, callM.err}
+	s.last = now
+	s.mux.Unlock()
+	return callM.val, callM.err, false
+}
+
+func (s *Single[T]) Reset() {
+	s.last = time.Time{}
+}
+
+func NewSingle[T any](wait time.Duration) *Single[T] {
+	return &Single[T]{wait: wait}
+}

common/singledo/singledo_test.go

@@ -0,0 +1,69 @@
+package singledo
+
+import (
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"go.uber.org/atomic"
+)
+
+func TestBasic(t *testing.T) {
+	single := NewSingle[int](time.Millisecond * 30)
+	foo := 0
+	shardCount := atomic.NewInt32(0)
+	call := func() (int, error) {
+		foo++
+		time.Sleep(time.Millisecond * 5)
+		return 0, nil
+	}
+
+	var wg sync.WaitGroup
+	const n = 5
+	wg.Add(n)
+	for i := 0; i < n; i++ {
+		go func() {
+			_, _, shard := single.Do(call)
+			if shard {
+				shardCount.Inc()
+			}
+			wg.Done()
+		}()
+	}
+
+	wg.Wait()
+	assert.Equal(t, 1, foo)
+	assert.Equal(t, int32(4), shardCount.Load())
+}
+
+func TestTimer(t *testing.T) {
+	single := NewSingle[int](time.Millisecond * 30)
+	foo := 0
+	callM := func() (int, error) {
+		foo++
+		return 0, nil
+	}
+
+	_, _, _ = single.Do(callM)
+	time.Sleep(10 * time.Millisecond)
+	_, _, shard := single.Do(callM)
+
+	assert.Equal(t, 1, foo)
+	assert.True(t, shard)
+}
+
+func TestReset(t *testing.T) {
+	single := NewSingle[int](time.Millisecond * 30)
+	foo := 0
+	callM := func() (int, error) {
+		foo++
+		return 0, nil
+	}
+
+	_, _, _ = single.Do(callM)
+	single.Reset()
+	_, _, _ = single.Do(callM)
+
+	assert.Equal(t, 2, foo)
+}

common/snifer/tls/sniff.go

@@ -0,0 +1,148 @@
+package tls
+
+import (
+	"encoding/binary"
+	"errors"
+	"strings"
+)
+
+var ErrNoClue = errors.New("not enough information for making a decision")
+
+type SniffHeader struct {
+	domain string
+}
+
+func (h *SniffHeader) Protocol() string {
+	return "tls"
+}
+
+func (h *SniffHeader) Domain() string {
+	return h.domain
+}
+
+var (
+	errNotTLS         = errors.New("not TLS header")
+	errNotClientHello = errors.New("not client hello")
+)
+
+func IsValidTLSVersion(major, minor byte) bool {
+	return major == 3
+}
+
+// ReadClientHello returns server name (if any) from TLS client hello message.
+// https://github.com/golang/go/blob/master/src/crypto/tls/handshake_messages.go#L300
+func ReadClientHello(data []byte, h *SniffHeader) error {
+	if len(data) < 42 {
+		return ErrNoClue
+	}
+	sessionIDLen := int(data[38])
+	if sessionIDLen > 32 || len(data) < 39+sessionIDLen {
+		return ErrNoClue
+	}
+	data = data[39+sessionIDLen:]
+	if len(data) < 2 {
+		return ErrNoClue
+	}
+	// cipherSuiteLen is the number of bytes of cipher suite numbers. Since
+	// they are uint16s, the number must be even.
+	cipherSuiteLen := int(data[0])<<8 | int(data[1])
+	if cipherSuiteLen%2 == 1 || len(data) < 2+cipherSuiteLen {
+		return errNotClientHello
+	}
+	data = data[2+cipherSuiteLen:]
+	if len(data) < 1 {
+		return ErrNoClue
+	}
+	compressionMethodsLen := int(data[0])
+	if len(data) < 1+compressionMethodsLen {
+		return ErrNoClue
+	}
+	data = data[1+compressionMethodsLen:]
+
+	if len(data) == 0 {
+		return errNotClientHello
+	}
+	if len(data) < 2 {
+		return errNotClientHello
+	}
+
+	extensionsLength := int(data[0])<<8 | int(data[1])
+	data = data[2:]
+	if extensionsLength != len(data) {
+		return errNotClientHello
+	}
+
+	for len(data) != 0 {
+		if len(data) < 4 {
+			return errNotClientHello
+		}
+		extension := uint16(data[0])<<8 | uint16(data[1])
+		length := int(data[2])<<8 | int(data[3])
+		data = data[4:]
+		if len(data) < length {
+			return errNotClientHello
+		}
+
+		if extension == 0x00 { /* extensionServerName */
+			d := data[:length]
+			if len(d) < 2 {
+				return errNotClientHello
+			}
+			namesLen := int(d[0])<<8 | int(d[1])
+			d = d[2:]
+			if len(d) != namesLen {
+				return errNotClientHello
+			}
+			for len(d) > 0 {
+				if len(d) < 3 {
+					return errNotClientHello
+				}
+				nameType := d[0]
+				nameLen := int(d[1])<<8 | int(d[2])
+				d = d[3:]
+				if len(d) < nameLen {
+					return errNotClientHello
+				}
+				if nameType == 0 {
+					serverName := string(d[:nameLen])
+					// An SNI value may not include a
+					// trailing dot. See
+					// https://tools.ietf.org/html/rfc6066#section-3.
+					if strings.HasSuffix(serverName, ".") {
+						return errNotClientHello
+					}
+					h.domain = serverName
+					return nil
+				}
+				d = d[nameLen:]
+			}
+		}
+		data = data[length:]
+	}
+
+	return errNotTLS
+}
+
+func SniffTLS(b []byte) (*SniffHeader, error) {
+	if len(b) < 5 {
+		return nil, ErrNoClue
+	}
+
+	if b[0] != 0x16 /* TLS Handshake */ {
+		return nil, errNotTLS
+	}
+	if !IsValidTLSVersion(b[1], b[2]) {
+		return nil, errNotTLS
+	}
+	headerLen := int(binary.BigEndian.Uint16(b[3:5]))
+	if 5+headerLen > len(b) {
+		return nil, ErrNoClue
+	}
+
+	h := &SniffHeader{}
+	err := ReadClientHello(b[5:5+headerLen], h)
+	if err == nil {
+		return h, nil
+	}
+	return nil, err
+}

common/snifer/tls/sniff_test.go

@@ -0,0 +1,159 @@
+package tls
+
+import (
+	"testing"
+)
+
+func TestTLSHeaders(t *testing.T) {
+	cases := []struct {
+		input  []byte
+		domain string
+		err    bool
+	}{
+		{
+			input: []byte{
+				0x16, 0x03, 0x01, 0x00, 0xc8, 0x01, 0x00, 0x00,
+				0xc4, 0x03, 0x03, 0x1a, 0xac, 0xb2, 0xa8, 0xfe,
+				0xb4, 0x96, 0x04, 0x5b, 0xca, 0xf7, 0xc1, 0xf4,
+				0x2e, 0x53, 0x24, 0x6e, 0x34, 0x0c, 0x58, 0x36,
+				0x71, 0x97, 0x59, 0xe9, 0x41, 0x66, 0xe2, 0x43,
+				0xa0, 0x13, 0xb6, 0x00, 0x00, 0x20, 0x1a, 0x1a,
+				0xc0, 0x2b, 0xc0, 0x2f, 0xc0, 0x2c, 0xc0, 0x30,
+				0xcc, 0xa9, 0xcc, 0xa8, 0xcc, 0x14, 0xcc, 0x13,
+				0xc0, 0x13, 0xc0, 0x14, 0x00, 0x9c, 0x00, 0x9d,
+				0x00, 0x2f, 0x00, 0x35, 0x00, 0x0a, 0x01, 0x00,
+				0x00, 0x7b, 0xba, 0xba, 0x00, 0x00, 0xff, 0x01,
+				0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x16, 0x00,
+				0x14, 0x00, 0x00, 0x11, 0x63, 0x2e, 0x73, 0x2d,
+				0x6d, 0x69, 0x63, 0x72, 0x6f, 0x73, 0x6f, 0x66,
+				0x74, 0x2e, 0x63, 0x6f, 0x6d, 0x00, 0x17, 0x00,
+				0x00, 0x00, 0x23, 0x00, 0x00, 0x00, 0x0d, 0x00,
+				0x14, 0x00, 0x12, 0x04, 0x03, 0x08, 0x04, 0x04,
+				0x01, 0x05, 0x03, 0x08, 0x05, 0x05, 0x01, 0x08,
+				0x06, 0x06, 0x01, 0x02, 0x01, 0x00, 0x05, 0x00,
+				0x05, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12,
+				0x00, 0x00, 0x00, 0x10, 0x00, 0x0e, 0x00, 0x0c,
+				0x02, 0x68, 0x32, 0x08, 0x68, 0x74, 0x74, 0x70,
+				0x2f, 0x31, 0x2e, 0x31, 0x00, 0x0b, 0x00, 0x02,
+				0x01, 0x00, 0x00, 0x0a, 0x00, 0x0a, 0x00, 0x08,
+				0xaa, 0xaa, 0x00, 0x1d, 0x00, 0x17, 0x00, 0x18,
+				0xaa, 0xaa, 0x00, 0x01, 0x00,
+			},
+			domain: "c.s-microsoft.com",
+			err:    false,
+		},
+		{
+			input: []byte{
+				0x16, 0x03, 0x01, 0x00, 0xee, 0x01, 0x00, 0x00,
+				0xea, 0x03, 0x03, 0xe7, 0x91, 0x9e, 0x93, 0xca,
+				0x78, 0x1b, 0x3c, 0xe0, 0x65, 0x25, 0x58, 0xb5,
+				0x93, 0xe1, 0x0f, 0x85, 0xec, 0x9a, 0x66, 0x8e,
+				0x61, 0x82, 0x88, 0xc8, 0xfc, 0xae, 0x1e, 0xca,
+				0xd7, 0xa5, 0x63, 0x20, 0xbd, 0x1c, 0x00, 0x00,
+				0x8b, 0xee, 0x09, 0xe3, 0x47, 0x6a, 0x0e, 0x74,
+				0xb0, 0xbc, 0xa3, 0x02, 0xa7, 0x35, 0xe8, 0x85,
+				0x70, 0x7c, 0x7a, 0xf0, 0x00, 0xdf, 0x4a, 0xea,
+				0x87, 0x01, 0x14, 0x91, 0x00, 0x20, 0xea, 0xea,
+				0xc0, 0x2b, 0xc0, 0x2f, 0xc0, 0x2c, 0xc0, 0x30,
+				0xcc, 0xa9, 0xcc, 0xa8, 0xcc, 0x14, 0xcc, 0x13,
+				0xc0, 0x13, 0xc0, 0x14, 0x00, 0x9c, 0x00, 0x9d,
+				0x00, 0x2f, 0x00, 0x35, 0x00, 0x0a, 0x01, 0x00,
+				0x00, 0x81, 0x9a, 0x9a, 0x00, 0x00, 0xff, 0x01,
+				0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x18, 0x00,
+				0x16, 0x00, 0x00, 0x13, 0x77, 0x77, 0x77, 0x30,
+				0x37, 0x2e, 0x63, 0x6c, 0x69, 0x63, 0x6b, 0x74,
+				0x61, 0x6c, 0x65, 0x2e, 0x6e, 0x65, 0x74, 0x00,
+				0x17, 0x00, 0x00, 0x00, 0x23, 0x00, 0x00, 0x00,
+				0x0d, 0x00, 0x14, 0x00, 0x12, 0x04, 0x03, 0x08,
+				0x04, 0x04, 0x01, 0x05, 0x03, 0x08, 0x05, 0x05,
+				0x01, 0x08, 0x06, 0x06, 0x01, 0x02, 0x01, 0x00,
+				0x05, 0x00, 0x05, 0x01, 0x00, 0x00, 0x00, 0x00,
+				0x00, 0x12, 0x00, 0x00, 0x00, 0x10, 0x00, 0x0e,
+				0x00, 0x0c, 0x02, 0x68, 0x32, 0x08, 0x68, 0x74,
+				0x74, 0x70, 0x2f, 0x31, 0x2e, 0x31, 0x75, 0x50,
+				0x00, 0x00, 0x00, 0x0b, 0x00, 0x02, 0x01, 0x00,
+				0x00, 0x0a, 0x00, 0x0a, 0x00, 0x08, 0x9a, 0x9a,
+				0x00, 0x1d, 0x00, 0x17, 0x00, 0x18, 0x8a, 0x8a,
+				0x00, 0x01, 0x00,
+			},
+			domain: "www07.clicktale.net",
+			err:    false,
+		},
+		{
+			input: []byte{
+				0x16, 0x03, 0x01, 0x00, 0xe6, 0x01, 0x00, 0x00, 0xe2, 0x03, 0x03, 0x81, 0x47, 0xc1,
+				0x66, 0xd5, 0x1b, 0xfa, 0x4b, 0xb5, 0xe0, 0x2a, 0xe1, 0xa7, 0x87, 0x13, 0x1d, 0x11, 0xaa, 0xc6,
+				0xce, 0xfc, 0x7f, 0xab, 0x94, 0xc8, 0x62, 0xad, 0xc8, 0xab, 0x0c, 0xdd, 0xcb, 0x20, 0x6f, 0x9d,
+				0x07, 0xf1, 0x95, 0x3e, 0x99, 0xd8, 0xf3, 0x6d, 0x97, 0xee, 0x19, 0x0b, 0x06, 0x1b, 0xf4, 0x84,
+				0x0b, 0xb6, 0x8f, 0xcc, 0xde, 0xe2, 0xd0, 0x2d, 0x6b, 0x0c, 0x1f, 0x52, 0x53, 0x13, 0x00, 0x08,
+				0x13, 0x02, 0x13, 0x03, 0x13, 0x01, 0x00, 0xff, 0x01, 0x00, 0x00, 0x91, 0x00, 0x00, 0x00, 0x0c,
+				0x00, 0x0a, 0x00, 0x00, 0x07, 0x64, 0x6f, 0x67, 0x66, 0x69, 0x73, 0x68, 0x00, 0x0b, 0x00, 0x04,
+				0x03, 0x00, 0x01, 0x02, 0x00, 0x0a, 0x00, 0x0c, 0x00, 0x0a, 0x00, 0x1d, 0x00, 0x17, 0x00, 0x1e,
+				0x00, 0x19, 0x00, 0x18, 0x00, 0x23, 0x00, 0x00, 0x00, 0x16, 0x00, 0x00, 0x00, 0x17, 0x00, 0x00,
+				0x00, 0x0d, 0x00, 0x1e, 0x00, 0x1c, 0x04, 0x03, 0x05, 0x03, 0x06, 0x03, 0x08, 0x07, 0x08, 0x08,
+				0x08, 0x09, 0x08, 0x0a, 0x08, 0x0b, 0x08, 0x04, 0x08, 0x05, 0x08, 0x06, 0x04, 0x01, 0x05, 0x01,
+				0x06, 0x01, 0x00, 0x2b, 0x00, 0x07, 0x06, 0x7f, 0x1c, 0x7f, 0x1b, 0x7f, 0x1a, 0x00, 0x2d, 0x00,
+				0x02, 0x01, 0x01, 0x00, 0x33, 0x00, 0x26, 0x00, 0x24, 0x00, 0x1d, 0x00, 0x20, 0x2f, 0x35, 0x0c,
+				0xb6, 0x90, 0x0a, 0xb7, 0xd5, 0xc4, 0x1b, 0x2f, 0x60, 0xaa, 0x56, 0x7b, 0x3f, 0x71, 0xc8, 0x01,
+				0x7e, 0x86, 0xd3, 0xb7, 0x0c, 0x29, 0x1a, 0x9e, 0x5b, 0x38, 0x3f, 0x01, 0x72,
+			},
+			domain: "dogfish",
+			err:    false,
+		},
+		{
+			input: []byte{
+				0x16, 0x03, 0x01, 0x01, 0x03, 0x01, 0x00, 0x00,
+				0xff, 0x03, 0x03, 0x3d, 0x89, 0x52, 0x9e, 0xee,
+				0xbe, 0x17, 0x63, 0x75, 0xef, 0x29, 0xbd, 0x14,
+				0x6a, 0x49, 0xe0, 0x2c, 0x37, 0x57, 0x71, 0x62,
+				0x82, 0x44, 0x94, 0x8f, 0x6e, 0x94, 0x08, 0x45,
+				0x7f, 0xdb, 0xc1, 0x00, 0x00, 0x3e, 0xc0, 0x2c,
+				0xc0, 0x30, 0x00, 0x9f, 0xcc, 0xa9, 0xcc, 0xa8,
+				0xcc, 0xaa, 0xc0, 0x2b, 0xc0, 0x2f, 0x00, 0x9e,
+				0xc0, 0x24, 0xc0, 0x28, 0x00, 0x6b, 0xc0, 0x23,
+				0xc0, 0x27, 0x00, 0x67, 0xc0, 0x0a, 0xc0, 0x14,
+				0x00, 0x39, 0xc0, 0x09, 0xc0, 0x13, 0x00, 0x33,
+				0x00, 0x9d, 0x00, 0x9c, 0x13, 0x02, 0x13, 0x03,
+				0x13, 0x01, 0x00, 0x3d, 0x00, 0x3c, 0x00, 0x35,
+				0x00, 0x2f, 0x00, 0xff, 0x01, 0x00, 0x00, 0x98,
+				0x00, 0x00, 0x00, 0x10, 0x00, 0x0e, 0x00, 0x00,
+				0x0b, 0x31, 0x30, 0x2e, 0x34, 0x32, 0x2e, 0x30,
+				0x2e, 0x32, 0x34, 0x33, 0x00, 0x0b, 0x00, 0x04,
+				0x03, 0x00, 0x01, 0x02, 0x00, 0x0a, 0x00, 0x0a,
+				0x00, 0x08, 0x00, 0x1d, 0x00, 0x17, 0x00, 0x19,
+				0x00, 0x18, 0x00, 0x23, 0x00, 0x00, 0x00, 0x0d,
+				0x00, 0x20, 0x00, 0x1e, 0x04, 0x03, 0x05, 0x03,
+				0x06, 0x03, 0x08, 0x04, 0x08, 0x05, 0x08, 0x06,
+				0x04, 0x01, 0x05, 0x01, 0x06, 0x01, 0x02, 0x03,
+				0x02, 0x01, 0x02, 0x02, 0x04, 0x02, 0x05, 0x02,
+				0x06, 0x02, 0x00, 0x16, 0x00, 0x00, 0x00, 0x17,
+				0x00, 0x00, 0x00, 0x2b, 0x00, 0x09, 0x08, 0x7f,
+				0x14, 0x03, 0x03, 0x03, 0x02, 0x03, 0x01, 0x00,
+				0x2d, 0x00, 0x03, 0x02, 0x01, 0x00, 0x00, 0x28,
+				0x00, 0x26, 0x00, 0x24, 0x00, 0x1d, 0x00, 0x20,
+				0x13, 0x7c, 0x6e, 0x97, 0xc4, 0xfd, 0x09, 0x2e,
+				0x70, 0x2f, 0x73, 0x5a, 0x9b, 0x57, 0x4d, 0x5f,
+				0x2b, 0x73, 0x2c, 0xa5, 0x4a, 0x98, 0x40, 0x3d,
+				0x75, 0x6e, 0xb4, 0x76, 0xf9, 0x48, 0x8f, 0x36,
+			},
+			domain: "10.42.0.243",
+			err:    false,
+		},
+	}
+
+	for _, test := range cases {
+		header, err := SniffTLS(test.input)
+		if test.err {
+			if err == nil {
+				t.Errorf("Exepct error but nil in test %v", test)
+			}
+		} else {
+			if err != nil {
+				t.Errorf("Expect no error but actually %s in test %v", err.Error(), test)
+			}
+			if header.Domain() != test.domain {
+				t.Error("expect domain ", test.domain, " but got ", header.Domain())
+			}
+		}
+	}
+}

common/sockopt/reuseaddr_linux.go

@@ -0,0 +1,19 @@
+package sockopt
+
+import (
+	"net"
+	"syscall"
+)
+
+func UDPReuseaddr(c *net.UDPConn) (err error) {
+	rc, err := c.SyscallConn()
+	if err != nil {
+		return
+	}
+
+	rc.Control(func(fd uintptr) {
+		err = syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1)
+	})
+
+	return
+}

common/sockopt/reuseaddr_other.go

@@ -0,0 +1,11 @@
+//go:build !linux
+
+package sockopt
+
+import (
+	"net"
+)
+
+func UDPReuseaddr(c *net.UDPConn) (err error) {
+	return
+}

common/structure/structure.go

@@ -28,8 +28,8 @@ func NewDecoder(option Option) *Decoder {
 	return &Decoder{option: &option}
 }
 
-// Decode transform a map[string]interface{} to a struct
+// Decode transform a map[string]any to a struct
-func (d *Decoder) Decode(src map[string]interface{}, dst interface{}) error {
+func (d *Decoder) Decode(src map[string]any, dst any) error {
 	if reflect.TypeOf(dst).Kind() != reflect.Ptr {
 		return fmt.Errorf("Decode must recive a ptr struct")
 	}
@@ -37,14 +37,16 @@ func (d *Decoder) Decode(src map[string]interface{}, dst interface{}) error {
 	v := reflect.ValueOf(dst).Elem()
 	for idx := 0; idx < v.NumField(); idx++ {
 		field := t.Field(idx)
+		if field.Anonymous {
+			if err := d.decodeStruct(field.Name, src, v.Field(idx)); err != nil {
+				return err
+			}
+			continue
+		}
 
 		tag := field.Tag.Get(d.option.TagName)
-		str := strings.SplitN(tag, ",", 2)
+		key, omitKey, found := strings.Cut(tag, ",")
-		key := str[0]
+		omitempty := found && omitKey == "omitempty"
-		omitempty := false
-		if len(str) > 1 {
-			omitempty = str[1] == "omitempty"
-		}
 
 		value, ok := src[key]
 		if !ok || value == nil {
@@ -62,7 +64,7 @@ func (d *Decoder) Decode(src map[string]interface{}, dst interface{}) error {
 	return nil
 }
 
-func (d *Decoder) decode(name string, data interface{}, val reflect.Value) error {
+func (d *Decoder) decode(name string, data any, val reflect.Value) error {
 	switch val.Kind() {
 	case reflect.Int:
 		return d.decodeInt(name, data, val)
@@ -76,17 +78,21 @@ func (d *Decoder) decode(name string, data interface{}, val reflect.Value) error
 		return d.decodeMap(name, data, val)
 	case reflect.Interface:
 		return d.setInterface(name, data, val)
+	case reflect.Struct:
+		return d.decodeStruct(name, data, val)
 	default:
 		return fmt.Errorf("type %s not support", val.Kind().String())
 	}
 }
 
-func (d *Decoder) decodeInt(name string, data interface{}, val reflect.Value) (err error) {
+func (d *Decoder) decodeInt(name string, data any, val reflect.Value) (err error) {
 	dataVal := reflect.ValueOf(data)
 	kind := dataVal.Kind()
 	switch {
 	case kind == reflect.Int:
 		val.SetInt(dataVal.Int())
+	case kind == reflect.Float64 && d.option.WeaklyTypedInput:
+		val.SetInt(int64(dataVal.Float()))
 	case kind == reflect.String && d.option.WeaklyTypedInput:
 		var i int64
 		i, err = strconv.ParseInt(dataVal.String(), 0, val.Type().Bits())
@@ -104,7 +110,7 @@ func (d *Decoder) decodeInt(name string, data interface{}, val reflect.Value) (e
 	return err
 }
 
-func (d *Decoder) decodeString(name string, data interface{}, val reflect.Value) (err error) {
+func (d *Decoder) decodeString(name string, data any, val reflect.Value) (err error) {
 	dataVal := reflect.ValueOf(data)
 	kind := dataVal.Kind()
 	switch {
@@ -121,7 +127,7 @@ func (d *Decoder) decodeString(name string, data interface{}, val reflect.Value)
 	return err
 }
 
-func (d *Decoder) decodeBool(name string, data interface{}, val reflect.Value) (err error) {
+func (d *Decoder) decodeBool(name string, data any, val reflect.Value) (err error) {
 	dataVal := reflect.ValueOf(data)
 	kind := dataVal.Kind()
 	switch {
@@ -138,7 +144,7 @@ func (d *Decoder) decodeBool(name string, data interface{}, val reflect.Value) (
 	return err
 }
 
-func (d *Decoder) decodeSlice(name string, data interface{}, val reflect.Value) error {
+func (d *Decoder) decodeSlice(name string, data any, val reflect.Value) error {
 	dataVal := reflect.Indirect(reflect.ValueOf(data))
 	valType := val.Type()
 	valElemType := valType.Elem()
@@ -153,9 +159,19 @@ func (d *Decoder) decodeSlice(name string, data interface{}, val reflect.Value)
 		for valSlice.Len() <= i {
 			valSlice = reflect.Append(valSlice, reflect.Zero(valElemType))
 		}
-		currentField := valSlice.Index(i)
-
 		fieldName := fmt.Sprintf("%s[%d]", name, i)
+		if currentData == nil {
+			// in weakly type mode, null will convert to zero value
+			if d.option.WeaklyTypedInput {
+				continue
+			}
+			// in non-weakly type mode, null will convert to nil if element's zero value is nil, otherwise return an error
+			if elemKind := valElemType.Kind(); elemKind == reflect.Map || elemKind == reflect.Slice {
+				continue
+			}
+			return fmt.Errorf("'%s' can not be null", fieldName)
+		}
+		currentField := valSlice.Index(i)
 		if err := d.decode(fieldName, currentData, currentField); err != nil {
 			return err
 		}
@@ -165,7 +181,7 @@ func (d *Decoder) decodeSlice(name string, data interface{}, val reflect.Value)
 	return nil
 }
 
-func (d *Decoder) decodeMap(name string, data interface{}, val reflect.Value) error {
+func (d *Decoder) decodeMap(name string, data any, val reflect.Value) error {
 	valType := val.Type()
 	valKeyType := valType.Key()
 	valElemType := valType.Elem()
@@ -214,6 +230,11 @@ func (d *Decoder) decodeMapFromMap(name string, dataVal reflect.Value, val refle
 		}
 
 		v := dataVal.MapIndex(k).Interface()
+		if v == nil {
+			errors = append(errors, fmt.Sprintf("filed %s invalid", fieldName))
+			continue
+		}
+
 		currentVal := reflect.Indirect(reflect.New(valElemType))
 		if err := d.decode(fieldName, v, currentVal); err != nil {
 			errors = append(errors, err.Error())
@@ -232,7 +253,160 @@ func (d *Decoder) decodeMapFromMap(name string, dataVal reflect.Value, val refle
 	return nil
 }
 
-func (d *Decoder) setInterface(name string, data interface{}, val reflect.Value) (err error) {
+func (d *Decoder) decodeStruct(name string, data any, val reflect.Value) error {
+	dataVal := reflect.Indirect(reflect.ValueOf(data))
+
+	// If the type of the value to write to and the data match directly,
+	// then we just set it directly instead of recursing into the structure.
+	if dataVal.Type() == val.Type() {
+		val.Set(dataVal)
+		return nil
+	}
+
+	dataValKind := dataVal.Kind()
+	switch dataValKind {
+	case reflect.Map:
+		return d.decodeStructFromMap(name, dataVal, val)
+	default:
+		return fmt.Errorf("'%s' expected a map, got '%s'", name, dataVal.Kind())
+	}
+}
+
+func (d *Decoder) decodeStructFromMap(name string, dataVal, val reflect.Value) error {
+	dataValType := dataVal.Type()
+	if kind := dataValType.Key().Kind(); kind != reflect.String && kind != reflect.Interface {
+		return fmt.Errorf(
+			"'%s' needs a map with string keys, has '%s' keys",
+			name, dataValType.Key().Kind())
+	}
+
+	dataValKeys := make(map[reflect.Value]struct{})
+	dataValKeysUnused := make(map[any]struct{})
+	for _, dataValKey := range dataVal.MapKeys() {
+		dataValKeys[dataValKey] = struct{}{}
+		dataValKeysUnused[dataValKey.Interface()] = struct{}{}
+	}
+
+	errors := make([]string, 0)
+
+	// This slice will keep track of all the structs we'll be decoding.
+	// There can be more than one struct if there are embedded structs
+	// that are squashed.
+	structs := make([]reflect.Value, 1, 5)
+	structs[0] = val
+
+	// Compile the list of all the fields that we're going to be decoding
+	// from all the structs.
+	type field struct {
+		field reflect.StructField
+		val   reflect.Value
+	}
+	fields := []field{}
+	for len(structs) > 0 {
+		structVal := structs[0]
+		structs = structs[1:]
+
+		structType := structVal.Type()
+
+		for i := 0; i < structType.NumField(); i++ {
+			fieldType := structType.Field(i)
+			fieldKind := fieldType.Type.Kind()
+
+			// If "squash" is specified in the tag, we squash the field down.
+			squash := false
+			tagParts := strings.Split(fieldType.Tag.Get(d.option.TagName), ",")
+			for _, tag := range tagParts[1:] {
+				if tag == "squash" {
+					squash = true
+					break
+				}
+			}
+
+			if squash {
+				if fieldKind != reflect.Struct {
+					errors = append(errors,
+						fmt.Errorf("%s: unsupported type for squash: %s", fieldType.Name, fieldKind).Error())
+				} else {
+					structs = append(structs, structVal.FieldByName(fieldType.Name))
+				}
+				continue
+			}
+
+			// Normal struct field, store it away
+			fields = append(fields, field{fieldType, structVal.Field(i)})
+		}
+	}
+
+	// for fieldType, field := range fields {
+	for _, f := range fields {
+		field, fieldValue := f.field, f.val
+		fieldName := field.Name
+
+		tagValue := field.Tag.Get(d.option.TagName)
+		tagValue = strings.SplitN(tagValue, ",", 2)[0]
+		if tagValue != "" {
+			fieldName = tagValue
+		}
+
+		rawMapKey := reflect.ValueOf(fieldName)
+		rawMapVal := dataVal.MapIndex(rawMapKey)
+		if !rawMapVal.IsValid() {
+			// Do a slower search by iterating over each key and
+			// doing case-insensitive search.
+			for dataValKey := range dataValKeys {
+				mK, ok := dataValKey.Interface().(string)
+				if !ok {
+					// Not a string key
+					continue
+				}
+
+				if strings.EqualFold(mK, fieldName) {
+					rawMapKey = dataValKey
+					rawMapVal = dataVal.MapIndex(dataValKey)
+					break
+				}
+			}
+
+			if !rawMapVal.IsValid() {
+				// There was no matching key in the map for the value in
+				// the struct. Just ignore.
+				continue
+			}
+		}
+
+		// Delete the key we're using from the unused map so we stop tracking
+		delete(dataValKeysUnused, rawMapKey.Interface())
+
+		if !fieldValue.IsValid() {
+			// This should never happen
+			panic("field is not valid")
+		}
+
+		// If we can't set the field, then it is unexported or something,
+		// and we just continue onwards.
+		if !fieldValue.CanSet() {
+			continue
+		}
+
+		// If the name is empty string, then we're at the root, and we
+		// don't dot-join the fields.
+		if name != "" {
+			fieldName = fmt.Sprintf("%s.%s", name, fieldName)
+		}
+
+		if err := d.decode(fieldName, rawMapVal.Interface(), fieldValue); err != nil {
+			errors = append(errors, err.Error())
+		}
+	}
+
+	if len(errors) > 0 {
+		return fmt.Errorf(strings.Join(errors, ","))
+	}
+
+	return nil
+}
+
+func (d *Decoder) setInterface(name string, data any, val reflect.Value) (err error) {
 	dataVal := reflect.ValueOf(data)
 	val.Set(dataVal)
 	return nil