Merge pull request #1 from Dreamacro/master

更新

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,100 +0,0 @@
----
-name: Bug report
-about: Create a report to help us improve
-title: "[Bug]"
-labels: ''
-assignees: ''
-
----
-
-<!--
-感谢你向 Clash Core 提交 issue！
-在提交之前，请确认：
-
-- [ ] 如果你可以自己 debug 并解决的话，提交 PR 吧！
-- [ ] 我已经在 [Issue Tracker](……/) 中找过我要提出的问题
-- [ ] 我已经使用 dev 分支版本测试过，问题依旧存在
-- [ ] 我已经仔细看过 [Documentation](https://github.com/Dreamacro/clash/wiki/) 并无法自行解决问题
-- [ ] 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
-
-请注意，如果你并没有遵照这个 issue template 填写内容，我们将直接关闭这个 issue。
-
-Thanks for opening an issue towards the Clash core!
-But before so, please do the following checklist:
-
-- [ ] Is this something you can **debug and fix**? Send a pull request! Bug fixes and documentation fixes are welcome.
-- [ ] I have searched on the [issue tracker](……/) for a related issue.
-- [ ] I have tested using the dev branch, and the issue still exists.
-- [ ] I have read the [documentation](https://github.com/Dreamacro/clash/wiki/) and was unable to solve the issue
-- [ ] This is an issue of the Clash core *per se*, not to the derivatives of Clash, like OpenClash or KoolClash
-
-Please understand that we close issues that fail to follow this issue template.
--->
-
-------------------------------------------------------------------
-
-<!-- 
-请附上任何可以帮助我们解决这个问题的信息，如果我们收到的信息不足，我们将对这个 issue 加上 *Needs more information* 标记并在收到更多资讯之前关闭 issue。
-Make sure to add **all the information needed to understand the bug** so that someone can help. If the info is missing we'll add the 'Needs more information' label and close the issue until there is enough information.
--->
-
-### Clash config
-<!--
-在下方附上 Clash core 脱敏后配置文件的内容
-Paste the Clash core configuration below.
--->
-<details>
-  <summary>config.yaml</summary>
-
-```yaml
-……
-```
-
-</details>
-
-### Clash log
-<!--
-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`.
--->
-```
-……
-```
-
-### 环境 Environment
-
-* 操作系统 (the OS that the Clash core is running on)
-……
-* 网路环境或拓扑 (network conditions/topology)
-……
-* iptables，如果适用 (if applicable)
-……
-* ISP 有没有进行 DNS 污染 (is your ISP performing DNS pollution?)
-……
-* 其他 (any other information that would be useful)
-……
-
-### 说明 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？
--->
-
-### 重现问题的具体布骤 Steps to Reproduce
-
-1. [First Step]
-2. [Second Step]
-3. ……
-
-**我预期会发生……？**
-<!-- **Expected behavior:** [What you expected to happen] -->
-
-**实际上发生了什么？**
-<!-- **Actual behavior:** [What actually happened] -->
-
-### 可能的解决方案 Possible Solution
-<!-- 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 -->
-
-### 更多信息 More Information

.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.md

@@ -1,78 +0,0 @@
----
-name: Feature request
-about: Suggest an idea for this project
-title: "[Feature]"
-labels: ''
-assignees: ''
-
----
-
-<!-- The English version is available. -->
-感谢你向 Clash Core 提交 Feature Request！
-在提交之前，请确认：
-
-- [ ] 我已经在 [Issue Tracker](……/) 中找过我要提出的请求
-
-请注意，如果你并没有遵照这个 issue template 填写内容，我们将直接关闭这个 issue。
-
-<!--
-Thanks for submitting a feature request towards the Clash core!
-But before so, please do the following checklist:
-
-- [ ] I have searched on the [issue tracker](……/) before creating the issue.
-
-Please understand that we close issues that fail to follow the issue template.
--->
-
-我都确认过了，我要继续提交。
-<!-- None of the above, create a feature request -->
-------------------------------------------------------------------
-
-请附上任何可以帮助我们解决这个问题的信息，如果我们收到的信息不足，我们将对这个 issue 加上 *Needs more information* 标记并在收到更多资讯之前关闭 issue。
-<!-- Make sure to add **all the information needed to understand the bug** so that someone can help. If the info is missing we'll add the 'Needs more information' label and close the issue until there is enough information. -->
-
-### Clash core config
-<!--
-在下方附上 Clash Core 脱敏后的配置内容
-Paste the Clash core configuration below.
--->
-```
-……
-```
-
-### Clash log
-<!--
-在下方附上 Clash Core 的日志，log level 请使用 DEBUG
-Paste the Clash core log below with the log level set to `DEBUG`.
--->
-```
-……
-```
-
-### 环境 Environment
-
-* Clash Core 的操作系统 (the OS that the Clash core is running on)
-……
-* 使用者的操作系统 (the OS running on the client)
-……
-* 网路环境或拓扑 (network conditions/topology)
-……
-* iptables，如果适用 (if applicable)
-……
-* ISP 有没有进行 DNS 污染 (is your ISP performing DNS pollution?)
-……
-* 其他
-……
-
-### 说明 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？
--->
-
-### 可能的解决方案 Possible Solution
-<!-- 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 -->
-
-### 更多信息 More Information

.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/docker.yml

@@ -52,7 +52,7 @@ jobs:
 
       - name: Get all docker tags
         if: startsWith(github.ref, 'refs/tags/')
-        uses: actions/github-script@v3
+        uses: actions/github-script@v4
         id: tags
         with:
           script: |

.github/workflows/linter.yml

@@ -0,0 +1,12 @@
+name: Linter
+on: [push, pull_request]
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v2
+        with:
+          version: latest
+          args: --disable-all -E govet -E gofumpt -E megacheck ./...

.github/workflows/release.yml

@@ -1,15 +1,18 @@
-name: Go
+name: Release
-on: [push, pull_request]
+on: [push]
 jobs:
-
   build:
-    name: 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: 1.16
+          go-version: ${{ steps.version.outputs.go_version }}
 
       - name: Check out code into the Go module directory
         uses: actions/checkout@v2
@@ -22,12 +25,9 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-go-
 
-      - name: Get dependencies, run test and static check
+      - name: Get dependencies, run test
         run: |
           go test ./...
-          go vet ./...
-          go install honnef.co/go/tools/cmd/staticcheck@latest
-          staticcheck -- $(go list ./...)
 
       - name: Build
         if: startsWith(github.ref, 'refs/tags/')
@@ -39,8 +39,6 @@ jobs:
       - name: Upload Release
         uses: softprops/action-gh-release@v1
         if: startsWith(github.ref, 'refs/tags/')
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           files: bin/*
           draft: true

.github/workflows/stale.yml

@@ -11,9 +11,8 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/stale@v3
+      - uses: actions/stale@v4
         with:
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
           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

@@ -12,7 +12,7 @@ bin/*
 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out
 
-# dep
+# go mod vendor
 vendor
 
 # GoLand
@@ -20,3 +20,6 @@ vendor
 
 # macOS file
 .DS_Store
+
+# test suite
+test/config/cache*

Makefile

@@ -28,6 +28,7 @@ PLATFORM_LIST = \
 WINDOWS_ARCH_LIST = \
 	windows-386 \
 	windows-amd64 \
+	windows-arm64 \
 	windows-arm32v7
 
 all: linux-amd64 darwin-amd64 windows-amd64 # Most used
@@ -91,7 +92,10 @@ windows-386:
 
 windows-amd64:
 	GOARCH=amd64 GOOS=windows $(GOBUILD) -o $(BINDIR)/$(NAME)-$@.exe
-	
+
+windows-arm64:
+	GOARCH=arm64 GOOS=windows $(GOBUILD) -o $(BINDIR)/$(NAME)-$@.exe
+
 windows-arm32v7:
 	GOARCH=arm GOOS=windows GOARM=7 $(GOBUILD) -o $(BINDIR)/$(NAME)-$@.exe
 
@@ -108,5 +112,9 @@ $(zip_releases): %.zip : %
 all-arch: $(PLATFORM_LIST) $(WINDOWS_ARCH_LIST)
 
 releases: $(gz_releases) $(zip_releases)
+
+lint:
+	golangci-lint run --disable-all -E govet -E gofumpt -E megacheck ./...
+
 clean:
 	rm $(BINDIR)/*

README.md

@@ -12,9 +12,13 @@
   <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
@@ -22,7 +26,7 @@
 - Local HTTP/HTTPS/SOCKS server with authentication support
 - VMess, Shadowsocks, Trojan, Snell protocol support for remote connections
 - Built-in DNS server that aims to minimize DNS pollution attack impact, supports DoH/DoT upstream and fake IP.
-- Rules based off domains, GEOIP, IP CIDR or ports to forward packets to different nodes
+- Rules based off domains, GEOIP, IPCIDR or Process to forward packets to different nodes
 - 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`.
@@ -40,20 +44,17 @@ Documentations are now moved to [GitHub Wiki](https://github.com/Dreamacro/clash
 ## Premium Release
 [Release](https://github.com/Dreamacro/clash/releases/tag/premium)
 
+## 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
-- [x] Connection manager

adapter/adapter.go

@@ -1,110 +1,21 @@
-package outbound
+package adapter
 
 import (
 	"context"
 	"encoding/json"
-	"errors"
+	"fmt"
 	"net"
 	"net/http"
+	"net/url"
 	"time"
 
 	"github.com/Dreamacro/clash/common/queue"
+	"github.com/Dreamacro/clash/component/dialer"
 	C "github.com/Dreamacro/clash/constant"
 
 	"go.uber.org/atomic"
 )
 
-type Base struct {
-	name string
-	addr string
-	tp   C.AdapterType
-	udp  bool
-}
-
-// 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")
-}
-
-// DialUDP implements C.ProxyAdapter
-func (b *Base) DialUDP(metadata *C.Metadata) (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
-}
-
-func NewBase(name string, addr string, tp C.AdapterType, udp bool) *Base {
-	return &Base{name, addr, tp, udp}
-}
-
-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()}}
-}
-
 type Proxy struct {
 	C.ProxyAdapter
 	history *queue.Queue
@@ -118,20 +29,32 @@ func (p *Proxy) Alive() bool {
 
 // Dial implements C.Proxy
 func (p *Proxy) Dial(metadata *C.Metadata) (C.Conn, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), tcpTimeout)
+	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) (C.Conn, error) {
+func (p *Proxy) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
-	conn, err := p.ProxyAdapter.DialContext(ctx, metadata)
+	conn, err := p.ProxyAdapter.DialContext(ctx, metadata, opts...)
-	if err != nil {
+	p.alive.Store(err == nil)
-		p.alive.Store(false)
-	}
 	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 {
 	queue := p.history.Copy()
@@ -172,6 +95,7 @@ func (p *Proxy) MarshalJSON() ([]byte, error) {
 	json.Unmarshal(inner, &mapping)
 	mapping["history"] = p.DelayHistory()
 	mapping["name"] = p.Name()
+	mapping["udp"] = p.SupportUDP()
 	return json.Marshal(mapping)
 }
 
@@ -225,6 +149,8 @@ func (p *Proxy) URLTest(ctx context.Context, url string) (t uint16, err error) {
 			return http.ErrUseLastResponse
 		},
 	}
+	defer client.CloseIdleConnections()
+
 	resp, err := client.Do(req)
 	if err != nil {
 		return
@@ -237,3 +163,31 @@ func (p *Proxy) URLTest(ctx context.Context, url string) (t uint16, err error) {
 func NewProxy(adapter C.ProxyAdapter) *Proxy {
 	return &Proxy{adapter, queue.New(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:    nil,
+		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/packet.go

@@ -1,8 +1,8 @@
 package inbound
 
 import (
-	"github.com/Dreamacro/clash/component/socks5"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/transport/socks5"
 )
 
 // PacketAdapter is a UDP Packet adapter for socks/redir/tun

adapter/inbound/socket.go

@@ -3,9 +3,9 @@ package inbound
 import (
 	"net"
 
-	"github.com/Dreamacro/clash/component/socks5"
 	C "github.com/Dreamacro/clash/constant"
 	"github.com/Dreamacro/clash/context"
+	"github.com/Dreamacro/clash/transport/socks5"
 )
 
 // NewSocket receive TCP inbound and return ConnContext

adapter/inbound/util.go

@@ -6,8 +6,8 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/Dreamacro/clash/component/socks5"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/transport/socks5"
 )
 
 func parseSocksAddr(target socks5.Addr) *C.Metadata {

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

@@ -13,10 +13,8 @@ type Direct struct {
 }
 
 // DialContext implements C.ProxyAdapter
-func (d *Direct) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
+func (d *Direct) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
-	address := net.JoinHostPort(metadata.String(), metadata.DstPort)
+	c, err := dialer.DialContext(ctx, "tcp", metadata.RemoteAddress(), d.Base.DialOptions(opts...)...)
-
-	c, err := dialer.DialContext(ctx, "tcp", address)
 	if err != nil {
 		return nil, err
 	}
@@ -24,9 +22,9 @@ func (d *Direct) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn,
 	return NewConn(c, d), nil
 }
 
-// DialUDP implements C.ProxyAdapter
+// ListenPacketContext implements C.ProxyAdapter
-func (d *Direct) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
+func (d *Direct) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
-	pc, err := dialer.ListenPacket("udp", "")
+	pc, err := dialer.ListenPacket(ctx, "udp", "", d.Base.DialOptions(opts...)...)
 	if err != nil {
 		return nil, err
 	}

adapter/outbound/http.go

@@ -25,6 +25,7 @@ type Http struct {
 }
 
 type HttpOption struct {
+	BasicOption
 	Name           string `proxy:"name"`
 	Server         string `proxy:"server"`
 	Port           int    `proxy:"port"`
@@ -53,8 +54,8 @@ func (h *Http) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 }
 
 // DialContext implements C.ProxyAdapter
-func (h *Http) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
+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)
+	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)
 	}
@@ -125,16 +126,16 @@ func NewHttp(option HttpOption) *Http {
 		}
 		tlsConfig = &tls.Config{
 			InsecureSkipVerify: option.SkipCertVerify,
-			ClientSessionCache: getClientSessionCache(),
 			ServerName:         sni,
 		}
 	}
 
 	return &Http{
 		Base: &Base{
-			name: option.Name,
+			name:  option.Name,
-			addr: net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
+			addr:  net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
-			tp:   C.Http,
+			tp:    C.Http,
+			iface: option.Interface,
 		},
 		user:      option.UserName,
 		pass:      option.Password,

adapter/outbound/reject.go

@@ -7,6 +7,7 @@ import (
 	"net"
 	"time"
 
+	"github.com/Dreamacro/clash/component/dialer"
 	C "github.com/Dreamacro/clash/constant"
 )
 
@@ -15,12 +16,12 @@ type Reject struct {
 }
 
 // DialContext implements C.ProxyAdapter
-func (r *Reject) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
+func (r *Reject) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
 	return NewConn(&NopConn{}, r), nil
 }
 
-// DialUDP implements C.ProxyAdapter
+// ListenPacketContext implements C.ProxyAdapter
-func (r *Reject) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
+func (r *Reject) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
 	return nil, errors.New("match reject rule")
 }
 

adapter/outbound/shadowsocks.go

@@ -2,7 +2,6 @@ package outbound
 
 import (
 	"context"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"net"
@@ -10,10 +9,10 @@ import (
 
 	"github.com/Dreamacro/clash/common/structure"
 	"github.com/Dreamacro/clash/component/dialer"
-	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"
+	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"
 )
@@ -29,6 +28,7 @@ type ShadowSocks struct {
 }
 
 type ShadowSocksOption struct {
+	BasicOption
 	Name       string                 `proxy:"name"`
 	Server     string                 `proxy:"server"`
 	Port       int                    `proxy:"port"`
@@ -75,8 +75,8 @@ func (ss *ShadowSocks) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, e
 }
 
 // DialContext implements C.ProxyAdapter
-func (ss *ShadowSocks) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
+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)
+	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)
 	}
@@ -88,9 +88,9 @@ func (ss *ShadowSocks) DialContext(ctx context.Context, metadata *C.Metadata) (_
 	return NewConn(c, ss), err
 }
 
-// DialUDP implements C.ProxyAdapter
+// ListenPacketContext implements C.ProxyAdapter
-func (ss *ShadowSocks) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
+func (ss *ShadowSocks) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
-	pc, err := dialer.ListenPacket("udp", "")
+	pc, err := dialer.ListenPacket(ctx, "udp", "", ss.Base.DialOptions(opts...)...)
 	if err != nil {
 		return nil, err
 	}
@@ -105,13 +105,6 @@ func (ss *ShadowSocks) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
 	return newPacketConn(&ssPacketConn{PacketConn: pc, rAddr: addr}, ss), nil
 }
 
-// MarshalJSON implements C.ProxyAdapter
-func (ss *ShadowSocks) MarshalJSON() ([]byte, error) {
-	return json.Marshal(map[string]string{
-		"type": ss.Type().String(),
-	})
-}
-
 func NewShadowSocks(option ShadowSocksOption) (*ShadowSocks, error) {
 	addr := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
 	cipher := option.Cipher
@@ -157,16 +150,16 @@ func NewShadowSocks(option ShadowSocksOption) (*ShadowSocks, error) {
 		if opts.TLS {
 			v2rayOption.TLS = true
 			v2rayOption.SkipCertVerify = opts.SkipCertVerify
-			v2rayOption.SessionCache = getClientSessionCache()
 		}
 	}
 
 	return &ShadowSocks{
 		Base: &Base{
-			name: option.Name,
+			name:  option.Name,
-			addr: addr,
+			addr:  addr,
-			tp:   C.Shadowsocks,
+			tp:    C.Shadowsocks,
-			udp:  option.UDP,
+			udp:   option.UDP,
+			iface: option.Interface,
 		},
 		cipher: ciph,
 

adapter/outbound/shadowsocksr.go

@@ -2,15 +2,14 @@ package outbound
 
 import (
 	"context"
-	"encoding/json"
 	"fmt"
 	"net"
 	"strconv"
 
 	"github.com/Dreamacro/clash/component/dialer"
-	"github.com/Dreamacro/clash/component/ssr/obfs"
-	"github.com/Dreamacro/clash/component/ssr/protocol"
 	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"
@@ -25,6 +24,7 @@ type ShadowSocksR struct {
 }
 
 type ShadowSocksROption struct {
+	BasicOption
 	Name          string `proxy:"name"`
 	Server        string `proxy:"server"`
 	Port          int    `proxy:"port"`
@@ -60,8 +60,8 @@ func (ssr *ShadowSocksR) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn,
 }
 
 // DialContext implements C.ProxyAdapter
-func (ssr *ShadowSocksR) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
+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)
+	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)
 	}
@@ -73,9 +73,9 @@ func (ssr *ShadowSocksR) DialContext(ctx context.Context, metadata *C.Metadata)
 	return NewConn(c, ssr), err
 }
 
-// DialUDP implements C.ProxyAdapter
+// ListenPacketContext implements C.ProxyAdapter
-func (ssr *ShadowSocksR) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
+func (ssr *ShadowSocksR) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
-	pc, err := dialer.ListenPacket("udp", "")
+	pc, err := dialer.ListenPacket(ctx, "udp", "", ssr.Base.DialOptions(opts...)...)
 	if err != nil {
 		return nil, err
 	}
@@ -91,13 +91,6 @@ func (ssr *ShadowSocksR) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
 	return newPacketConn(&ssPacketConn{PacketConn: pc, rAddr: addr}, ssr), nil
 }
 
-// MarshalJSON implements C.ProxyAdapter
-func (ssr *ShadowSocksR) MarshalJSON() ([]byte, error) {
-	return json.Marshal(map[string]string{
-		"type": ssr.Type().String(),
-	})
-}
-
 func NewShadowSocksR(option ShadowSocksROption) (*ShadowSocksR, error) {
 	addr := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
 	cipher := option.Cipher
@@ -144,10 +137,11 @@ func NewShadowSocksR(option ShadowSocksROption) (*ShadowSocksR, error) {
 
 	return &ShadowSocksR{
 		Base: &Base{
-			name: option.Name,
+			name:  option.Name,
-			addr: addr,
+			addr:  addr,
-			tp:   C.ShadowsocksR,
+			tp:    C.ShadowsocksR,
-			udp:  option.UDP,
+			udp:   option.UDP,
+			iface: option.Interface,
 		},
 		cipher:   coreCiph,
 		obfs:     obfs,

adapter/outbound/snell.go

@@ -8,9 +8,9 @@ import (
 
 	"github.com/Dreamacro/clash/common/structure"
 	"github.com/Dreamacro/clash/component/dialer"
-	obfs "github.com/Dreamacro/clash/component/simple-obfs"
-	"github.com/Dreamacro/clash/component/snell"
 	C "github.com/Dreamacro/clash/constant"
+	obfs "github.com/Dreamacro/clash/transport/simple-obfs"
+	"github.com/Dreamacro/clash/transport/snell"
 )
 
 type Snell struct {
@@ -22,6 +22,7 @@ type Snell struct {
 }
 
 type SnellOption struct {
+	BasicOption
 	Name     string                 `proxy:"name"`
 	Server   string                 `proxy:"server"`
 	Port     int                    `proxy:"port"`
@@ -51,20 +52,20 @@ func streamConn(c net.Conn, option streamOption) *snell.Snell {
 // 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.Atoi(metadata.DstPort)
+	port, _ := strconv.ParseInt(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) (_ C.Conn, err error) {
+func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
-	if s.version == snell.Version2 {
+	if s.version == snell.Version2 && len(opts) == 0 {
 		c, err := s.pool.Get()
 		if err != nil {
 			return nil, err
 		}
 
-		port, _ := strconv.Atoi(metadata.DstPort)
+		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
@@ -72,7 +73,7 @@ func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn
 		return NewConn(c, s), err
 	}
 
-	c, err := dialer.DialContext(ctx, "tcp", s.addr)
+	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)
 	}
@@ -111,9 +112,10 @@ func NewSnell(option SnellOption) (*Snell, error) {
 
 	s := &Snell{
 		Base: &Base{
-			name: option.Name,
+			name:  option.Name,
-			addr: addr,
+			addr:  addr,
-			tp:   C.Snell,
+			tp:    C.Snell,
+			iface: option.Interface,
 		},
 		psk:        psk,
 		obfsOption: obfsOption,
@@ -122,7 +124,7 @@ func NewSnell(option SnellOption) (*Snell, error) {
 
 	if option.Version == snell.Version2 {
 		s.pool = snell.NewPool(func(ctx context.Context) (*snell.Snell, error) {
-			c, err := dialer.DialContext(ctx, "tcp", addr)
+			c, err := dialer.DialContext(ctx, "tcp", addr, s.Base.DialOptions()...)
 			if err != nil {
 				return nil, err
 			}

adapter/outbound/socks5.go

@@ -6,13 +6,12 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
 	"strconv"
 
 	"github.com/Dreamacro/clash/component/dialer"
-	"github.com/Dreamacro/clash/component/socks5"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/transport/socks5"
 )
 
 type Socks5 struct {
@@ -25,6 +24,7 @@ type Socks5 struct {
 }
 
 type Socks5Option struct {
+	BasicOption
 	Name           string `proxy:"name"`
 	Server         string `proxy:"server"`
 	Port           int    `proxy:"port"`
@@ -60,8 +60,8 @@ func (ss *Socks5) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error)
 }
 
 // DialContext implements C.ProxyAdapter
-func (ss *Socks5) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
+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)
+	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)
 	}
@@ -77,11 +77,9 @@ func (ss *Socks5) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Co
 	return NewConn(c, ss), nil
 }
 
-// DialUDP implements C.ProxyAdapter
+// ListenPacketContext implements C.ProxyAdapter
-func (ss *Socks5) DialUDP(metadata *C.Metadata) (_ C.PacketConn, err error) {
+func (ss *Socks5) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
-	ctx, cancel := context.WithTimeout(context.Background(), tcpTimeout)
+	c, err := dialer.DialContext(ctx, "tcp", ss.addr, ss.Base.DialOptions(opts...)...)
-	defer cancel()
-	c, err := dialer.DialContext(ctx, "tcp", ss.addr)
 	if err != nil {
 		err = fmt.Errorf("%s connect error: %w", ss.addr, err)
 		return
@@ -110,13 +108,13 @@ func (ss *Socks5) DialUDP(metadata *C.Metadata) (_ C.PacketConn, err error) {
 		return
 	}
 
-	pc, err := dialer.ListenPacket("udp", "")
+	pc, err := dialer.ListenPacket(ctx, "udp", "", ss.Base.DialOptions(opts...)...)
 	if err != nil {
 		return
 	}
 
 	go func() {
-		io.Copy(ioutil.Discard, c)
+		io.Copy(io.Discard, c)
 		c.Close()
 		// A UDP association terminates when the TCP connection that the UDP
 		// ASSOCIATE request arrived on terminates. RFC1928
@@ -145,17 +143,17 @@ func NewSocks5(option Socks5Option) *Socks5 {
 	if option.TLS {
 		tlsConfig = &tls.Config{
 			InsecureSkipVerify: option.SkipCertVerify,
-			ClientSessionCache: getClientSessionCache(),
 			ServerName:         option.Server,
 		}
 	}
 
 	return &Socks5{
 		Base: &Base{
-			name: option.Name,
+			name:  option.Name,
-			addr: net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
+			addr:  net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
-			tp:   C.Socks5,
+			tp:    C.Socks5,
-			udp:  option.UDP,
+			udp:   option.UDP,
+			iface: option.Interface,
 		},
 		user:           option.UserName,
 		pass:           option.Password,

adapter/outbound/trojan.go

@@ -3,15 +3,15 @@ package outbound
 import (
 	"context"
 	"crypto/tls"
-	"encoding/json"
 	"fmt"
 	"net"
+	"net/http"
 	"strconv"
 
 	"github.com/Dreamacro/clash/component/dialer"
-	"github.com/Dreamacro/clash/component/gun"
-	"github.com/Dreamacro/clash/component/trojan"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/transport/gun"
+	"github.com/Dreamacro/clash/transport/trojan"
 
 	"golang.org/x/net/http2"
 )
@@ -19,6 +19,7 @@ import (
 type Trojan struct {
 	*Base
 	instance *trojan.Trojan
+	option   *TrojanOption
 
 	// for gun mux
 	gunTLSConfig *tls.Config
@@ -27,6 +28,7 @@ type Trojan struct {
 }
 
 type TrojanOption struct {
+	BasicOption
 	Name           string      `proxy:"name"`
 	Server         string      `proxy:"server"`
 	Port           int         `proxy:"port"`
@@ -37,6 +39,34 @@ type TrojanOption struct {
 	UDP            bool        `proxy:"udp,omitempty"`
 	Network        string      `proxy:"network,omitempty"`
 	GrpcOpts       GrpcOptions `proxy:"grpc-opts,omitempty"`
+	WSOpts         WSOptions   `proxy:"ws-opts,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
@@ -45,7 +75,7 @@ func (t *Trojan) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error)
 	if t.transport != nil {
 		c, err = gun.StreamGunWithConn(c, t.gunTLSConfig, t.gunConfig)
 	} else {
-		c, err = t.instance.StreamConn(c)
+		c, err = t.plainStream(c)
 	}
 
 	if err != nil {
@@ -57,9 +87,9 @@ func (t *Trojan) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error)
 }
 
 // DialContext implements C.ProxyAdapter
-func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
+func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
 	// gun transport
-	if t.transport != nil {
+	if t.transport != nil && len(opts) == 0 {
 		c, err := gun.StreamGunWithTransport(t.transport, t.gunConfig)
 		if err != nil {
 			return nil, err
@@ -73,7 +103,7 @@ func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Con
 		return NewConn(c, t), nil
 	}
 
-	c, err := dialer.DialContext(ctx, "tcp", t.addr)
+	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)
 	}
@@ -89,27 +119,25 @@ func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Con
 	return NewConn(c, t), err
 }
 
-// DialUDP implements C.ProxyAdapter
+// ListenPacketContext implements C.ProxyAdapter
-func (t *Trojan) DialUDP(metadata *C.Metadata) (_ C.PacketConn, err error) {
+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 {
+	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 {
-		ctx, cancel := context.WithTimeout(context.Background(), tcpTimeout)
+		c, err = dialer.DialContext(ctx, "tcp", t.addr, t.Base.DialOptions(opts...)...)
-		defer cancel()
-		c, err = dialer.DialContext(ctx, "tcp", t.addr)
 		if err != nil {
 			return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
 		}
 		defer safeConnClose(c, err)
 		tcpKeepAlive(c)
-		c, err = t.instance.StreamConn(c)
+		c, err = t.plainStream(c)
 		if err != nil {
 			return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
 		}
@@ -124,21 +152,14 @@ func (t *Trojan) DialUDP(metadata *C.Metadata) (_ C.PacketConn, err error) {
 	return newPacketConn(pc, t), err
 }
 
-func (t *Trojan) MarshalJSON() ([]byte, error) {
-	return json.Marshal(map[string]string{
-		"type": t.Type().String(),
-	})
-}
-
 func NewTrojan(option TrojanOption) (*Trojan, error) {
 	addr := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
 
 	tOption := &trojan.Option{
-		Password:           option.Password,
+		Password:       option.Password,
-		ALPN:               option.ALPN,
+		ALPN:           option.ALPN,
-		ServerName:         option.Server,
+		ServerName:     option.Server,
-		SkipCertVerify:     option.SkipCertVerify,
+		SkipCertVerify: option.SkipCertVerify,
-		ClientSessionCache: getClientSessionCache(),
 	}
 
 	if option.SNI != "" {
@@ -147,17 +168,19 @@ func NewTrojan(option TrojanOption) (*Trojan, error) {
 
 	t := &Trojan{
 		Base: &Base{
-			name: option.Name,
+			name:  option.Name,
-			addr: addr,
+			addr:  addr,
-			tp:   C.Trojan,
+			tp:    C.Trojan,
-			udp:  option.UDP,
+			udp:   option.UDP,
+			iface: option.Interface,
 		},
 		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)
+			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())
 			}
@@ -170,7 +193,6 @@ func NewTrojan(option TrojanOption) (*Trojan, error) {
 			MinVersion:         tls.VersionTLS12,
 			InsecureSkipVerify: tOption.SkipCertVerify,
 			ServerName:         tOption.ServerName,
-			ClientSessionCache: getClientSessionCache(),
 		}
 
 		t.transport = gun.NewHTTP2Client(dialFn, tlsConfig)

adapter/outbound/util.go

@@ -2,56 +2,15 @@ package outbound
 
 import (
 	"bytes"
-	"crypto/tls"
-	"fmt"
 	"net"
-	"net/url"
 	"strconv"
-	"sync"
 	"time"
 
 	"github.com/Dreamacro/clash/component/resolver"
-	"github.com/Dreamacro/clash/component/socks5"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/transport/socks5"
 )
 
-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 == "" {
-		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:    nil,
-		DstPort:  port,
-	}
-	return
-}
-
 func tcpKeepAlive(c net.Conn) {
 	if tcp, ok := c.(*net.TCPConn); ok {
 		tcp.SetKeepAlive(true)
@@ -59,17 +18,10 @@ func tcpKeepAlive(c net.Conn) {
 	}
 }
 
-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)
+	p, _ := strconv.ParseUint(metadata.DstPort, 10, 16)
 	port := []byte{uint8(p >> 8), uint8(p & 0xff)}
 	switch metadata.AddrType {
 	case socks5.AtypDomainName:

adapter/outbound/vmess.go

@@ -11,10 +11,10 @@ import (
 	"strings"
 
 	"github.com/Dreamacro/clash/component/dialer"
-	"github.com/Dreamacro/clash/component/gun"
 	"github.com/Dreamacro/clash/component/resolver"
-	"github.com/Dreamacro/clash/component/vmess"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/transport/gun"
+	"github.com/Dreamacro/clash/transport/vmess"
 
 	"golang.org/x/net/http2"
 )
@@ -31,22 +31,26 @@ type Vmess struct {
 }
 
 type VmessOption struct {
-	Name           string            `proxy:"name"`
+	BasicOption
-	Server         string            `proxy:"server"`
+	Name           string       `proxy:"name"`
-	Port           int               `proxy:"port"`
+	Server         string       `proxy:"server"`
-	UUID           string            `proxy:"uuid"`
+	Port           int          `proxy:"port"`
-	AlterID        int               `proxy:"alterId"`
+	UUID           string       `proxy:"uuid"`
-	Cipher         string            `proxy:"cipher"`
+	AlterID        int          `proxy:"alterId"`
-	TLS            bool              `proxy:"tls,omitempty"`
+	Cipher         string       `proxy:"cipher"`
-	UDP            bool              `proxy:"udp,omitempty"`
+	UDP            bool         `proxy:"udp,omitempty"`
-	Network        string            `proxy:"network,omitempty"`
+	Network        string       `proxy:"network,omitempty"`
-	HTTPOpts       HTTPOptions       `proxy:"http-opts,omitempty"`
+	TLS            bool         `proxy:"tls,omitempty"`
-	HTTP2Opts      HTTP2Options      `proxy:"h2-opts,omitempty"`
+	SkipCertVerify bool         `proxy:"skip-cert-verify,omitempty"`
-	GrpcOpts       GrpcOptions       `proxy:"grpc-opts,omitempty"`
+	ServerName     string       `proxy:"servername,omitempty"`
-	WSPath         string            `proxy:"ws-path,omitempty"`
+	HTTPOpts       HTTPOptions  `proxy:"http-opts,omitempty"`
-	WSHeaders      map[string]string `proxy:"ws-headers,omitempty"`
+	HTTP2Opts      HTTP2Options `proxy:"h2-opts,omitempty"`
-	SkipCertVerify bool              `proxy:"skip-cert-verify,omitempty"`
+	GrpcOpts       GrpcOptions  `proxy:"grpc-opts,omitempty"`
-	ServerName     string            `proxy:"servername,omitempty"`
+	WSOpts         WSOptions    `proxy:"ws-opts,omitempty"`
+
+	// TODO: remove these until 2022
+	WSHeaders map[string]string `proxy:"ws-headers,omitempty"`
+	WSPath    string            `proxy:"ws-path,omitempty"`
 }
 
 type HTTPOptions struct {
@@ -64,21 +68,37 @@ 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":
-		host, port, _ := net.SplitHostPort(v.addr)
+		if v.option.WSOpts.Path == "" {
-		wsOpts := &vmess.WebsocketConfig{
+			v.option.WSOpts.Path = v.option.WSPath
-			Host: host,
+		}
-			Port: port,
+		if len(v.option.WSOpts.Headers) == 0 {
-			Path: v.option.WSPath,
+			v.option.WSOpts.Headers = v.option.WSHeaders
 		}
 
-		if len(v.option.WSHeaders) != 0 {
+		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.WSHeaders {
+			for key, value := range v.option.WSOpts.Headers {
 				header.Add(key, value)
 			}
 			wsOpts.Headers = header
@@ -86,9 +106,16 @@ func (v *Vmess) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 
 		if v.option.TLS {
 			wsOpts.TLS = true
-			wsOpts.SessionCache = getClientSessionCache()
+			wsOpts.TLSConfig = &tls.Config{
-			wsOpts.SkipCertVerify = v.option.SkipCertVerify
+				ServerName:         host,
-			wsOpts.ServerName = v.option.ServerName
+				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":
@@ -98,7 +125,6 @@ func (v *Vmess) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 			tlsOpts := &vmess.TLSConfig{
 				Host:           host,
 				SkipCertVerify: v.option.SkipCertVerify,
-				SessionCache:   getClientSessionCache(),
 			}
 
 			if v.option.ServerName != "" {
@@ -125,7 +151,6 @@ func (v *Vmess) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 		tlsOpts := vmess.TLSConfig{
 			Host:           host,
 			SkipCertVerify: v.option.SkipCertVerify,
-			SessionCache:   getClientSessionCache(),
 			NextProtos:     []string{"h2"},
 		}
 
@@ -153,7 +178,6 @@ func (v *Vmess) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 			tlsOpts := &vmess.TLSConfig{
 				Host:           host,
 				SkipCertVerify: v.option.SkipCertVerify,
-				SessionCache:   getClientSessionCache(),
 			}
 
 			if v.option.ServerName != "" {
@@ -172,9 +196,9 @@ func (v *Vmess) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 }
 
 // DialContext implements C.ProxyAdapter
-func (v *Vmess) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
+func (v *Vmess) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
 	// gun transport
-	if v.transport != nil {
+	if v.transport != nil && len(opts) == 0 {
 		c, err := gun.StreamGunWithTransport(v.transport, v.gunConfig)
 		if err != nil {
 			return nil, err
@@ -189,7 +213,7 @@ func (v *Vmess) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn
 		return NewConn(c, v), nil
 	}
 
-	c, err := dialer.DialContext(ctx, "tcp", v.addr)
+	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())
 	}
@@ -200,8 +224,8 @@ func (v *Vmess) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn
 	return NewConn(c, v), err
 }
 
-// DialUDP implements C.ProxyAdapter
+// ListenPacketContext implements C.ProxyAdapter
-func (v *Vmess) DialUDP(metadata *C.Metadata) (_ C.PacketConn, err error) {
+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)
@@ -213,7 +237,7 @@ func (v *Vmess) DialUDP(metadata *C.Metadata) (_ C.PacketConn, err error) {
 
 	var c net.Conn
 	// gun transport
-	if v.transport != nil {
+	if v.transport != nil && len(opts) == 0 {
 		c, err = gun.StreamGunWithTransport(v.transport, v.gunConfig)
 		if err != nil {
 			return nil, err
@@ -222,9 +246,7 @@ func (v *Vmess) DialUDP(metadata *C.Metadata) (_ C.PacketConn, err error) {
 
 		c, err = v.client.StreamConn(c, parseVmessAddr(metadata))
 	} else {
-		ctx, cancel := context.WithTimeout(context.Background(), tcpTimeout)
+		c, err = dialer.DialContext(ctx, "tcp", v.addr, v.Base.DialOptions(opts...)...)
-		defer cancel()
-		c, err = dialer.DialContext(ctx, "tcp", v.addr)
 		if err != nil {
 			return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
 		}
@@ -264,10 +286,11 @@ func NewVmess(option VmessOption) (*Vmess, error) {
 
 	v := &Vmess{
 		Base: &Base{
-			name: option.Name,
+			name:  option.Name,
-			addr: net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
+			addr:  net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
-			tp:   C.Vmess,
+			tp:    C.Vmess,
-			udp:  option.UDP,
+			udp:   option.UDP,
+			iface: option.Interface,
 		},
 		client: client,
 		option: &option,
@@ -280,7 +303,7 @@ func NewVmess(option VmessOption) (*Vmess, error) {
 		}
 	case "grpc":
 		dialFn := func(network, addr string) (net.Conn, error) {
-			c, err := dialer.DialContext(context.Background(), "tcp", v.addr)
+			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())
 			}
@@ -330,7 +353,7 @@ func parseVmessAddr(metadata *C.Metadata) *vmess.DstAddr {
 		copy(addr[1:], []byte(metadata.Host))
 	}
 
-	port, _ := strconv.Atoi(metadata.DstPort)
+	port, _ := strconv.ParseUint(metadata.DstPort, 10, 16)
 	return &vmess.DstAddr{
 		UDP:      metadata.NetWork == C.UDP,
 		AddrType: addrType,

adapter/outboundgroup/common.go

@@ -3,8 +3,8 @@ package outboundgroup
 import (
 	"time"
 
-	"github.com/Dreamacro/clash/adapters/provider"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/constant/provider"
 )
 
 const (

adapter/outboundgroup/fallback.go

@@ -4,10 +4,11 @@ import (
 	"context"
 	"encoding/json"
 
-	"github.com/Dreamacro/clash/adapters/outbound"
+	"github.com/Dreamacro/clash/adapter/outbound"
-	"github.com/Dreamacro/clash/adapters/provider"
 	"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 {
@@ -23,19 +24,19 @@ func (f *Fallback) Now() string {
 }
 
 // DialContext implements C.ProxyAdapter
-func (f *Fallback) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
+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)
+	c, err := proxy.DialContext(ctx, metadata, f.Base.DialOptions(opts...)...)
 	if err == nil {
 		c.AppendToChains(f)
 	}
 	return c, err
 }
 
-// DialUDP implements C.ProxyAdapter
+// ListenPacketContext implements C.ProxyAdapter
-func (f *Fallback) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
+func (f *Fallback) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
 	proxy := f.findAliveProxy(true)
-	pc, err := proxy.DialUDP(metadata)
+	pc, err := proxy.ListenPacketContext(ctx, metadata, f.Base.DialOptions(opts...)...)
 	if err == nil {
 		pc.AppendToChains(f)
 	}
@@ -90,11 +91,16 @@ func (f *Fallback) findAliveProxy(touch bool) C.Proxy {
 	return proxies[0]
 }
 
-func NewFallback(options *GroupCommonOption, providers []provider.ProxyProvider) *Fallback {
+func NewFallback(option *GroupCommonOption, providers []provider.ProxyProvider) *Fallback {
 	return &Fallback{
-		Base:       outbound.NewBase(options.Name, "", C.Fallback, false),
+		Base: outbound.NewBase(outbound.BaseOption{
+			Name:        option.Name,
+			Type:        C.Fallback,
+			Interface:   option.Interface,
+			RoutingMark: option.RoutingMark,
+		}),
 		single:     singledo.NewSingle(defaultGetProxiesDuration),
 		providers:  providers,
-		disableUDP: options.DisableUDP,
+		disableUDP: option.DisableUDP,
 	}
 }

adapter/outboundgroup/loadbalance.go

@@ -7,11 +7,12 @@ import (
 	"fmt"
 	"net"
 
-	"github.com/Dreamacro/clash/adapters/outbound"
+	"github.com/Dreamacro/clash/adapter/outbound"
-	"github.com/Dreamacro/clash/adapters/provider"
 	"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"
 )
@@ -69,7 +70,7 @@ func jumpHash(key uint64, buckets int32) int32 {
 }
 
 // DialContext implements C.ProxyAdapter
-func (lb *LoadBalance) DialContext(ctx context.Context, metadata *C.Metadata) (c C.Conn, err error) {
+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)
@@ -78,12 +79,12 @@ func (lb *LoadBalance) DialContext(ctx context.Context, metadata *C.Metadata) (c
 
 	proxy := lb.Unwrap(metadata)
 
-	c, err = proxy.DialContext(ctx, metadata)
+	c, err = proxy.DialContext(ctx, metadata, lb.Base.DialOptions(opts...)...)
 	return
 }
 
-// DialUDP implements C.ProxyAdapter
+// ListenPacketContext implements C.ProxyAdapter
-func (lb *LoadBalance) DialUDP(metadata *C.Metadata) (pc C.PacketConn, err error) {
+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)
@@ -91,8 +92,7 @@ func (lb *LoadBalance) DialUDP(metadata *C.Metadata) (pc C.PacketConn, err error
 	}()
 
 	proxy := lb.Unwrap(metadata)
-
+	return proxy.ListenPacketContext(ctx, metadata, lb.Base.DialOptions(opts...)...)
-	return proxy.DialUDP(metadata)
 }
 
 // SupportUDP implements C.ProxyAdapter
@@ -159,7 +159,7 @@ func (lb *LoadBalance) MarshalJSON() ([]byte, error) {
 	})
 }
 
-func NewLoadBalance(options *GroupCommonOption, providers []provider.ProxyProvider, strategy string) (lb *LoadBalance, err error) {
+func NewLoadBalance(option *GroupCommonOption, providers []provider.ProxyProvider, strategy string) (lb *LoadBalance, err error) {
 	var strategyFn strategyFn
 	switch strategy {
 	case "consistent-hashing":
@@ -170,10 +170,15 @@ func NewLoadBalance(options *GroupCommonOption, providers []provider.ProxyProvid
 		return nil, fmt.Errorf("%w: %s", errStrategy, strategy)
 	}
 	return &LoadBalance{
-		Base:       outbound.NewBase(options.Name, "", C.LoadBalance, false),
+		Base: outbound.NewBase(outbound.BaseOption{
+			Name:        option.Name,
+			Type:        C.LoadBalance,
+			Interface:   option.Interface,
+			RoutingMark: option.RoutingMark,
+		}),
 		single:     singledo.NewSingle(defaultGetProxiesDuration),
 		providers:  providers,
 		strategyFn: strategyFn,
-		disableUDP: options.DisableUDP,
+		disableUDP: option.DisableUDP,
 	}, nil
 }

adapter/outboundgroup/parser.go

@@ -4,9 +4,11 @@ import (
 	"errors"
 	"fmt"
 
-	"github.com/Dreamacro/clash/adapters/provider"
+	"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 (
@@ -18,6 +20,7 @@ var (
 )
 
 type GroupCommonOption struct {
+	outbound.BasicOption
 	Name       string   `group:"name"`
 	Type       string   `group:"type"`
 	Proxies    []string `group:"proxies,omitempty"`
@@ -28,7 +31,7 @@ type GroupCommonOption struct {
 	DisableUDP bool     `group:"disable-udp,omitempty"`
 }
 
-func ParseProxyGroup(config map[string]interface{}, proxyMap map[string]C.Proxy, providersMap map[string]provider.ProxyProvider) (C.ProxyAdapter, error) {
+func ParseProxyGroup(config map[string]interface{}, proxyMap map[string]C.Proxy, providersMap map[string]types.ProxyProvider) (C.ProxyAdapter, error) {
 	decoder := structure.NewDecoder(structure.Option{TagName: "group", WeaklyTypedInput: true})
 
 	groupOption := &GroupCommonOption{
@@ -44,7 +47,7 @@ func ParseProxyGroup(config map[string]interface{}, proxyMap map[string]C.Proxy,
 
 	groupName := groupOption.Name
 
-	providers := []provider.ProxyProvider{}
+	providers := []types.ProxyProvider{}
 
 	if len(groupOption.Proxies) == 0 && len(groupOption.Use) == 0 {
 		return nil, errMissProxy
@@ -138,15 +141,15 @@ func getProxies(mapping map[string]C.Proxy, list []string) ([]C.Proxy, error) {
 	return ps, nil
 }
 
-func getProviders(mapping map[string]provider.ProxyProvider, list []string) ([]provider.ProxyProvider, error) {
+func getProviders(mapping map[string]types.ProxyProvider, list []string) ([]types.ProxyProvider, error) {
-	var ps []provider.ProxyProvider
+	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() == provider.Compatible {
+		if p.VehicleType() == types.Compatible {
 			return nil, fmt.Errorf("proxy group %s can't contains in `use`", name)
 		}
 		ps = append(ps, p)

adapter/outboundgroup/relay.go

@@ -3,14 +3,13 @@ package outboundgroup
 import (
 	"context"
 	"encoding/json"
-	"errors"
 	"fmt"
 
-	"github.com/Dreamacro/clash/adapters/outbound"
+	"github.com/Dreamacro/clash/adapter/outbound"
-	"github.com/Dreamacro/clash/adapters/provider"
 	"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 {
@@ -20,15 +19,25 @@ type Relay struct {
 }
 
 // DialContext implements C.ProxyAdapter
-func (r *Relay) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
+func (r *Relay) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
-	proxies := r.proxies(metadata, true)
+	var proxies []C.Proxy
-	if len(proxies) == 0 {
+	for _, proxy := range r.proxies(metadata, true) {
-		return nil, errors.New("proxy does not exist")
+		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())
+	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)
 	}
@@ -91,9 +100,14 @@ func (r *Relay) proxies(metadata *C.Metadata, touch bool) []C.Proxy {
 	return proxies
 }
 
-func NewRelay(options *GroupCommonOption, providers []provider.ProxyProvider) *Relay {
+func NewRelay(option *GroupCommonOption, providers []provider.ProxyProvider) *Relay {
 	return &Relay{
-		Base:      outbound.NewBase(options.Name, "", C.Relay, false),
+		Base: outbound.NewBase(outbound.BaseOption{
+			Name:        option.Name,
+			Type:        C.Relay,
+			Interface:   option.Interface,
+			RoutingMark: option.RoutingMark,
+		}),
 		single:    singledo.NewSingle(defaultGetProxiesDuration),
 		providers: providers,
 	}

adapter/outboundgroup/selector.go

@@ -5,10 +5,11 @@ import (
 	"encoding/json"
 	"errors"
 
-	"github.com/Dreamacro/clash/adapters/outbound"
+	"github.com/Dreamacro/clash/adapter/outbound"
-	"github.com/Dreamacro/clash/adapters/provider"
 	"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 {
@@ -20,17 +21,17 @@ type Selector struct {
 }
 
 // DialContext implements C.ProxyAdapter
-func (s *Selector) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
+func (s *Selector) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
-	c, err := s.selectedProxy(true).DialContext(ctx, metadata)
+	c, err := s.selectedProxy(true).DialContext(ctx, metadata, s.Base.DialOptions(opts...)...)
 	if err == nil {
 		c.AppendToChains(s)
 	}
 	return c, err
 }
 
-// DialUDP implements C.ProxyAdapter
+// ListenPacketContext implements C.ProxyAdapter
-func (s *Selector) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
+func (s *Selector) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
-	pc, err := s.selectedProxy(true).DialUDP(metadata)
+	pc, err := s.selectedProxy(true).ListenPacketContext(ctx, metadata, s.Base.DialOptions(opts...)...)
 	if err == nil {
 		pc.AppendToChains(s)
 	}
@@ -96,13 +97,18 @@ func (s *Selector) selectedProxy(touch bool) C.Proxy {
 	return elm.(C.Proxy)
 }
 
-func NewSelector(options *GroupCommonOption, providers []provider.ProxyProvider) *Selector {
+func NewSelector(option *GroupCommonOption, providers []provider.ProxyProvider) *Selector {
 	selected := providers[0].Proxies()[0].Name()
 	return &Selector{
-		Base:       outbound.NewBase(options.Name, "", C.Selector, false),
+		Base: outbound.NewBase(outbound.BaseOption{
+			Name:        option.Name,
+			Type:        C.Selector,
+			Interface:   option.Interface,
+			RoutingMark: option.RoutingMark,
+		}),
 		single:     singledo.NewSingle(defaultGetProxiesDuration),
 		providers:  providers,
 		selected:   selected,
-		disableUDP: options.DisableUDP,
+		disableUDP: option.DisableUDP,
 	}
 }

adapter/outboundgroup/urltest.go

@@ -5,10 +5,11 @@ import (
 	"encoding/json"
 	"time"
 
-	"github.com/Dreamacro/clash/adapters/outbound"
+	"github.com/Dreamacro/clash/adapter/outbound"
-	"github.com/Dreamacro/clash/adapters/provider"
 	"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)
@@ -34,17 +35,17 @@ func (u *URLTest) Now() string {
 }
 
 // DialContext implements C.ProxyAdapter
-func (u *URLTest) DialContext(ctx context.Context, metadata *C.Metadata) (c C.Conn, err error) {
+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)
+	c, err = u.fast(true).DialContext(ctx, metadata, u.Base.DialOptions(opts...)...)
 	if err == nil {
 		c.AppendToChains(u)
 	}
 	return c, err
 }
 
-// DialUDP implements C.ProxyAdapter
+// ListenPacketContext implements C.ProxyAdapter
-func (u *URLTest) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
+func (u *URLTest) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
-	pc, err := u.fast(true).DialUDP(metadata)
+	pc, err := u.fast(true).ListenPacketContext(ctx, metadata, u.Base.DialOptions(opts...)...)
 	if err == nil {
 		pc.AppendToChains(u)
 	}
@@ -133,13 +134,18 @@ func parseURLTestOption(config map[string]interface{}) []urlTestOption {
 	return opts
 }
 
-func NewURLTest(commonOptions *GroupCommonOption, providers []provider.ProxyProvider, options ...urlTestOption) *URLTest {
+func NewURLTest(option *GroupCommonOption, providers []provider.ProxyProvider, options ...urlTestOption) *URLTest {
 	urlTest := &URLTest{
-		Base:       outbound.NewBase(commonOptions.Name, "", C.URLTest, false),
+		Base: outbound.NewBase(outbound.BaseOption{
+			Name:        option.Name,
+			Type:        C.URLTest,
+			Interface:   option.Interface,
+			RoutingMark: option.RoutingMark,
+		}),
 		single:     singledo.NewSingle(defaultGetProxiesDuration),
 		fastSingle: singledo.NewSingle(time.Second * 10),
 		providers:  providers,
-		disableUDP: commonOptions.DisableUDP,
+		disableUDP: option.DisableUDP,
 	}
 
 	for _, option := range options {

adapter/parser.go

@@ -1,8 +1,9 @@
-package outbound
+package adapter
 
 import (
 	"fmt"
 
+	"github.com/Dreamacro/clash/adapter/outbound"
 	"github.com/Dreamacro/clash/common/structure"
 	C "github.com/Dreamacro/clash/constant"
 )
@@ -20,36 +21,36 @@ func ParseProxy(mapping map[string]interface{}) (C.Proxy, error) {
 	)
 	switch proxyType {
 	case "ss":
-		ssOption := &ShadowSocksOption{}
+		ssOption := &outbound.ShadowSocksOption{}
 		err = decoder.Decode(mapping, ssOption)
 		if err != nil {
 			break
 		}
-		proxy, err = NewShadowSocks(*ssOption)
+		proxy, err = outbound.NewShadowSocks(*ssOption)
 	case "ssr":
-		ssrOption := &ShadowSocksROption{}
+		ssrOption := &outbound.ShadowSocksROption{}
 		err = decoder.Decode(mapping, ssrOption)
 		if err != nil {
 			break
 		}
-		proxy, err = NewShadowSocksR(*ssrOption)
+		proxy, err = outbound.NewShadowSocksR(*ssrOption)
 	case "socks5":
-		socksOption := &Socks5Option{}
+		socksOption := &outbound.Socks5Option{}
 		err = decoder.Decode(mapping, socksOption)
 		if err != nil {
 			break
 		}
-		proxy = NewSocks5(*socksOption)
+		proxy = outbound.NewSocks5(*socksOption)
 	case "http":
-		httpOption := &HttpOption{}
+		httpOption := &outbound.HttpOption{}
 		err = decoder.Decode(mapping, httpOption)
 		if err != nil {
 			break
 		}
-		proxy = NewHttp(*httpOption)
+		proxy = outbound.NewHttp(*httpOption)
 	case "vmess":
-		vmessOption := &VmessOption{
+		vmessOption := &outbound.VmessOption{
-			HTTPOpts: HTTPOptions{
+			HTTPOpts: outbound.HTTPOptions{
 				Method: "GET",
 				Path:   []string{"/"},
 			},
@@ -58,21 +59,21 @@ func ParseProxy(mapping map[string]interface{}) (C.Proxy, error) {
 		if err != nil {
 			break
 		}
-		proxy, err = NewVmess(*vmessOption)
+		proxy, err = outbound.NewVmess(*vmessOption)
 	case "snell":
-		snellOption := &SnellOption{}
+		snellOption := &outbound.SnellOption{}
 		err = decoder.Decode(mapping, snellOption)
 		if err != nil {
 			break
 		}
-		proxy, err = NewSnell(*snellOption)
+		proxy, err = outbound.NewSnell(*snellOption)
 	case "trojan":
-		trojanOption := &TrojanOption{}
+		trojanOption := &outbound.TrojanOption{}
 		err = decoder.Decode(mapping, trojanOption)
 		if err != nil {
 			break
 		}
-		proxy, err = NewTrojan(*trojanOption)
+		proxy, err = outbound.NewTrojan(*trojanOption)
 	default:
 		return nil, fmt.Errorf("unsupport proxy type: %s", proxyType)
 	}

adapter/provider/fetcher.go

@@ -3,24 +3,24 @@ package provider
 import (
 	"bytes"
 	"crypto/md5"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"time"
 
+	types "github.com/Dreamacro/clash/constant/provider"
 	"github.com/Dreamacro/clash/log"
 )
 
 var (
-	fileMode os.FileMode = 0666
+	fileMode os.FileMode = 0o666
-	dirMode  os.FileMode = 0755
+	dirMode  os.FileMode = 0o755
 )
 
 type parser = func([]byte) (interface{}, error)
 
 type fetcher struct {
 	name      string
-	vehicle   Vehicle
+	vehicle   types.Vehicle
 	updatedAt *time.Time
 	ticker    *time.Ticker
 	done      chan struct{}
@@ -33,7 +33,7 @@ func (f *fetcher) Name() string {
 	return f.name
 }
 
-func (f *fetcher) VehicleType() VehicleType {
+func (f *fetcher) VehicleType() types.VehicleType {
 	return f.vehicle.Type()
 }
 
@@ -44,7 +44,7 @@ func (f *fetcher) Initial() (interface{}, error) {
 		isLocal bool
 	)
 	if stat, fErr := os.Stat(f.vehicle.Path()); fErr == nil {
-		buf, err = ioutil.ReadFile(f.vehicle.Path())
+		buf, err = os.ReadFile(f.vehicle.Path())
 		modTime := stat.ModTime()
 		f.updatedAt = &modTime
 		isLocal = true
@@ -76,7 +76,7 @@ func (f *fetcher) Initial() (interface{}, error) {
 		isLocal = false
 	}
 
-	if f.vehicle.Type() != File && !isLocal {
+	if f.vehicle.Type() != types.File && !isLocal {
 		if err := safeWrite(f.vehicle.Path(), buf); err != nil {
 			return nil, err
 		}
@@ -110,7 +110,7 @@ func (f *fetcher) Update() (interface{}, bool, error) {
 		return nil, false, err
 	}
 
-	if f.vehicle.Type() != File {
+	if f.vehicle.Type() != types.File {
 		if err := safeWrite(f.vehicle.Path(), buf); err != nil {
 			return nil, false, err
 		}
@@ -164,10 +164,10 @@ func safeWrite(path string, buf []byte) error {
 		}
 	}
 
-	return ioutil.WriteFile(path, buf, fileMode)
+	return os.WriteFile(path, buf, fileMode)
 }
 
-func newFetcher(name string, interval time.Duration, vehicle Vehicle, parser parser, onUpdate func(interface{})) *fetcher {
+func newFetcher(name string, interval time.Duration, vehicle types.Vehicle, parser parser, onUpdate func(interface{})) *fetcher {
 	var ticker *time.Ticker
 	if interval != 0 {
 		ticker = time.NewTicker(interval)

adapter/provider/healthcheck.go

@@ -2,9 +2,9 @@ package provider
 
 import (
 	"context"
-	"sync"
 	"time"
 
+	"github.com/Dreamacro/clash/common/batch"
 	C "github.com/Dreamacro/clash/constant"
 
 	"go.uber.org/atomic"
@@ -59,20 +59,17 @@ func (hc *HealthCheck) touch() {
 }
 
 func (hc *HealthCheck) check() {
-	ctx, cancel := context.WithTimeout(context.Background(), defaultURLTestTimeout)
+	b, _ := batch.New(context.Background(), batch.WithConcurrencyNum(10))
-	wg := &sync.WaitGroup{}
-
 	for _, proxy := range hc.proxies {
-		wg.Add(1)
+		p := proxy
-
+		b.Go(p.Name(), func() (interface{}, error) {
-		go func(p C.Proxy) {
+			ctx, cancel := context.WithTimeout(context.Background(), defaultURLTestTimeout)
+			defer cancel()
 			p.URLTest(ctx, hc.url)
-			wg.Done()
+			return nil, nil
-		}(proxy)
+		})
 	}
-
+	b.Wait()
-	wg.Wait()
-	cancel()
 }
 
 func (hc *HealthCheck) close() {

adapter/provider/parser.go

@@ -7,11 +7,10 @@ import (
 
 	"github.com/Dreamacro/clash/common/structure"
 	C "github.com/Dreamacro/clash/constant"
+	types "github.com/Dreamacro/clash/constant/provider"
 )
 
-var (
+var errVehicleType = errors.New("unsupport vehicle type")
-	errVehicleType = errors.New("unsupport vehicle type")
-)
 
 type healthCheckSchema struct {
 	Enable   bool   `provider:"enable"`
@@ -28,7 +27,7 @@ type proxyProviderSchema struct {
 	HealthCheck healthCheckSchema `provider:"health-check,omitempty"`
 }
 
-func ParseProxyProvider(name string, mapping map[string]interface{}) (ProxyProvider, error) {
+func ParseProxyProvider(name string, mapping map[string]interface{}) (types.ProxyProvider, error) {
 	decoder := structure.NewDecoder(structure.Option{TagName: "provider", WeaklyTypedInput: true})
 
 	schema := &proxyProviderSchema{
@@ -48,7 +47,7 @@ func ParseProxyProvider(name string, mapping map[string]interface{}) (ProxyProvi
 
 	path := C.Path.Resolve(schema.Path)
 
-	var vehicle Vehicle
+	var vehicle types.Vehicle
 	switch schema.Type {
 	case "file":
 		vehicle = NewFileVehicle(path)

adapter/provider/provider.go

@@ -7,8 +7,9 @@ import (
 	"runtime"
 	"time"
 
-	"github.com/Dreamacro/clash/adapters/outbound"
+	"github.com/Dreamacro/clash/adapter"
 	C "github.com/Dreamacro/clash/constant"
+	types "github.com/Dreamacro/clash/constant/provider"
 
 	"gopkg.in/yaml.v2"
 )
@@ -17,45 +18,6 @@ const (
 	ReservedName = "default"
 )
 
-// Provider Type
-const (
-	Proxy ProviderType = iota
-	Rule
-)
-
-// ProviderType defined
-type ProviderType int
-
-func (pt ProviderType) String() string {
-	switch pt {
-	case Proxy:
-		return "Proxy"
-	case Rule:
-		return "Rule"
-	default:
-		return "Unknown"
-	}
-}
-
-// Provider interface
-type Provider interface {
-	Name() string
-	VehicleType() VehicleType
-	Type() ProviderType
-	Initial() error
-	Update() error
-}
-
-// ProxyProvider interface
-type ProxyProvider interface {
-	Provider
-	Proxies() []C.Proxy
-	// ProxiesWithTouch is used to inform the provider that the proxy is actually being used while getting the list of proxies.
-	// Commonly used in Dial and DialUDP
-	ProxiesWithTouch() []C.Proxy
-	HealthCheck()
-}
-
 type ProxySchema struct {
 	Proxies []map[string]interface{} `yaml:"proxies"`
 }
@@ -107,8 +69,8 @@ func (pp *proxySetProvider) Initial() error {
 	return nil
 }
 
-func (pp *proxySetProvider) Type() ProviderType {
+func (pp *proxySetProvider) Type() types.ProviderType {
-	return Proxy
+	return types.Proxy
 }
 
 func (pp *proxySetProvider) Proxies() []C.Proxy {
@@ -133,7 +95,7 @@ func proxiesParse(buf []byte) (interface{}, error) {
 
 	proxies := []C.Proxy{}
 	for idx, mapping := range schema.Proxies {
-		proxy, err := outbound.ParseProxy(mapping)
+		proxy, err := adapter.ParseProxy(mapping)
 		if err != nil {
 			return nil, fmt.Errorf("proxy %d error: %w", idx, err)
 		}
@@ -160,7 +122,7 @@ func stopProxyProvider(pd *ProxySetProvider) {
 	pd.fetcher.Destroy()
 }
 
-func NewProxySetProvider(name string, interval time.Duration, vehicle Vehicle, hc *HealthCheck) *ProxySetProvider {
+func NewProxySetProvider(name string, interval time.Duration, vehicle types.Vehicle, hc *HealthCheck) *ProxySetProvider {
 	if hc.auto() {
 		go hc.process()
 	}
@@ -219,12 +181,12 @@ func (cp *compatibleProvider) Initial() error {
 	return nil
 }
 
-func (cp *compatibleProvider) VehicleType() VehicleType {
+func (cp *compatibleProvider) VehicleType() types.VehicleType {
-	return Compatible
+	return types.Compatible
 }
 
-func (cp *compatibleProvider) Type() ProviderType {
+func (cp *compatibleProvider) Type() types.ProviderType {
-	return Proxy
+	return types.Proxy
 }
 
 func (cp *compatibleProvider) Proxies() []C.Proxy {
@@ -242,7 +204,7 @@ func stopCompatibleProvider(pd *CompatibleProvider) {
 
 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")
+		return nil, errors.New("provider need one proxy at least")
 	}
 
 	if hc.auto() {

adapter/provider/vehicle.go

@@ -2,49 +2,23 @@ package provider
 
 import (
 	"context"
-	"io/ioutil"
+	"io"
+	"net"
 	"net/http"
 	"net/url"
+	"os"
 	"time"
 
 	"github.com/Dreamacro/clash/component/dialer"
+	types "github.com/Dreamacro/clash/constant/provider"
 )
 
-// Vehicle Type
-const (
-	File VehicleType = iota
-	HTTP
-	Compatible
-)
-
-// VehicleType defined
-type VehicleType int
-
-func (v VehicleType) String() string {
-	switch v {
-	case File:
-		return "File"
-	case HTTP:
-		return "HTTP"
-	case Compatible:
-		return "Compatible"
-	default:
-		return "Unknown"
-	}
-}
-
-type Vehicle interface {
-	Read() ([]byte, error)
-	Path() string
-	Type() VehicleType
-}
-
 type FileVehicle struct {
 	path string
 }
 
-func (f *FileVehicle) Type() VehicleType {
+func (f *FileVehicle) Type() types.VehicleType {
-	return File
+	return types.File
 }
 
 func (f *FileVehicle) Path() string {
@@ -52,7 +26,7 @@ func (f *FileVehicle) Path() string {
 }
 
 func (f *FileVehicle) Read() ([]byte, error) {
-	return ioutil.ReadFile(f.path)
+	return os.ReadFile(f.path)
 }
 
 func NewFileVehicle(path string) *FileVehicle {
@@ -64,8 +38,8 @@ type HTTPVehicle struct {
 	path string
 }
 
-func (h *HTTPVehicle) Type() VehicleType {
+func (h *HTTPVehicle) Type() types.VehicleType {
-	return HTTP
+	return types.HTTP
 }
 
 func (h *HTTPVehicle) Path() string {
@@ -99,7 +73,9 @@ func (h *HTTPVehicle) Read() ([]byte, error) {
 		IdleConnTimeout:       90 * time.Second,
 		TLSHandshakeTimeout:   10 * time.Second,
 		ExpectContinueTimeout: 1 * time.Second,
-		DialContext:           dialer.DialContext,
+		DialContext: func(ctx context.Context, network, address string) (net.Conn, error) {
+			return dialer.DialContext(ctx, network, address)
+		},
 	}
 
 	client := http.Client{Transport: transport}
@@ -109,7 +85,7 @@ func (h *HTTPVehicle) Read() ([]byte, error) {
 	}
 	defer resp.Body.Close()
 
-	buf, err := ioutil.ReadAll(resp.Body)
+	buf, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return nil, err
 	}

adapters/inbound/http.go

@@ -1,61 +0,0 @@
-package inbound
-
-import (
-	"net"
-	"net/http"
-	"strings"
-
-	C "github.com/Dreamacro/clash/constant"
-	"github.com/Dreamacro/clash/context"
-)
-
-// NewHTTP receive normal http request and return HTTPContext
-func NewHTTP(request *http.Request, conn net.Conn) *context.HTTPContext {
-	metadata := parseHTTPAddr(request)
-	metadata.Type = C.HTTP
-	if ip, port, err := parseAddr(conn.RemoteAddr().String()); err == nil {
-		metadata.SrcIP = ip
-		metadata.SrcPort = port
-	}
-	return context.NewHTTPContext(conn, request, metadata)
-}
-
-// 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))
-	}
-}
-
-// RemoveExtraHTTPHostPort remove extra host port (example.com:80 --> example.com)
-// It resolves the behavior of some HTTP servers that do not handle host:80 (e.g. baidu.com)
-func RemoveExtraHTTPHostPort(req *http.Request) {
-	host := req.Host
-	if host == "" {
-		host = req.URL.Host
-	}
-
-	if pHost, port, err := net.SplitHostPort(host); err == nil && port == "80" {
-		host = pHost
-	}
-
-	req.Host = host
-	req.URL.Host = host
-}

common/batch/batch.go

@@ -0,0 +1,105 @@
+package batch
+
+import (
+	"context"
+	"sync"
+)
+
+type Option = func(b *Batch)
+
+type Result struct {
+	Value interface{}
+	Err   error
+}
+
+type Error struct {
+	Key string
+	Err error
+}
+
+func WithConcurrencyNum(n int) Option {
+	return func(b *Batch) {
+		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 struct {
+	result map[string]Result
+	queue  chan struct{}
+	wg     sync.WaitGroup
+	mux    sync.Mutex
+	err    *Error
+	once   sync.Once
+	cancel func()
+}
+
+func (b *Batch) Go(key string, fn func() (interface{}, 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{value, err}
+		b.mux.Lock()
+		defer b.mux.Unlock()
+		b.result[key] = ret
+	}()
+}
+
+func (b *Batch) Wait() *Error {
+	b.wg.Wait()
+	if b.cancel != nil {
+		b.cancel()
+	}
+	return b.err
+}
+
+func (b *Batch) WaitAndGetResult() (map[string]Result, *Error) {
+	err := b.Wait()
+	return b.Result(), err
+}
+
+func (b *Batch) Result() map[string]Result {
+	b.mux.Lock()
+	defer b.mux.Unlock()
+	copy := map[string]Result{}
+	for k, v := range b.result {
+		copy[k] = v
+	}
+	return copy
+}
+
+func New(ctx context.Context, opts ...Option) (*Batch, context.Context) {
+	ctx, cancel := context.WithCancel(ctx)
+
+	b := &Batch{
+		result: map[string]Result{},
+	}
+
+	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(context.Background())
+
+	now := time.Now()
+	b.Go("foo", func() (interface{}, error) {
+		time.Sleep(time.Millisecond * 100)
+		return "foo", nil
+	})
+	b.Go("bar", func() (interface{}, 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.(string))
+	}
+}
+
+func TestBatchWithConcurrencyNum(t *testing.T) {
+	b, _ := New(
+		context.Background(),
+		WithConcurrencyNum(3),
+	)
+
+	now := time.Now()
+	for i := 0; i < 7; i++ {
+		idx := i
+		b.Go(strconv.Itoa(idx), func() (interface{}, 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.(string))
+	}
+}
+
+func TestBatchContext(t *testing.T) {
+	b, ctx := New(context.Background())
+
+	b.Go("error", func() (interface{}, error) {
+		time.Sleep(time.Millisecond * 100)
+		return nil, errors.New("test error")
+	})
+
+	b.Go("ctx", func() (interface{}, error) {
+		<-ctx.Done()
+		return nil, 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/lrucache_test.go

@@ -149,7 +149,6 @@ func TestSetWithExpire(t *testing.T) {
 	assert.Equal(t, nil, res)
 	assert.Equal(t, time.Time{}, expires)
 	assert.Equal(t, false, exist)
-
 }
 
 func TestStale(t *testing.T) {

common/murmur3/murmur32.go

@@ -67,7 +67,6 @@ func (d *digest32) bmix(p []byte) (tail []byte) {
 }
 
 func (d *digest32) Sum32() (h1 uint32) {
-
 	h1 = d.h1
 
 	var k1 uint32

common/net/bufconn.go

@@ -1,4 +1,4 @@
-package mixed
+package net
 
 import (
 	"bufio"
@@ -11,6 +11,9 @@ type BufferedConn struct {
 }
 
 func NewBufferedConn(c net.Conn) *BufferedConn {
+	if bc, ok := c.(*BufferedConn); ok {
+		return bc
+	}
 	return &BufferedConn{bufio.NewReader(c), c}
 }
 

common/observable/observable_test.go

@@ -38,7 +38,7 @@ func TestObservable_MultiSubscribe(t *testing.T) {
 	src := NewObservable(iter)
 	ch1, _ := src.Subscribe()
 	ch2, _ := src.Subscribe()
-	var count = atomic.NewInt32(0)
+	count := atomic.NewInt32(0)
 
 	var wg sync.WaitGroup
 	wg.Add(2)

common/pool/alloc.go

@@ -8,11 +8,7 @@ import (
 	"sync"
 )
 
-var defaultAllocator *Allocator
+var defaultAllocator = NewAllocator()
-
-func init() {
-	defaultAllocator = NewAllocator()
-}
 
 // Allocator for incoming frames, optimized to prevent overwriting after zeroing
 type Allocator struct {
@@ -57,6 +53,7 @@ func (alloc *Allocator) Put(buf []byte) error {
 	}
 
 	//lint:ignore SA6002 ignore temporarily
+	//nolint
 	alloc.buffers[bits].Put(buf)
 	return nil
 }

common/pool/buffer.go

@@ -0,0 +1,17 @@
+package pool
+
+import (
+	"bytes"
+	"sync"
+)
+
+var bufferPool = sync.Pool{New: func() interface{} { 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

@@ -5,6 +5,11 @@ const (
 	// 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
 	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
 )
 
 func Get(size int) []byte {

common/singledo/singledo_test.go

@@ -12,7 +12,7 @@ import (
 func TestBasic(t *testing.T) {
 	single := NewSingle(time.Millisecond * 30)
 	foo := 0
-	var shardCount = atomic.NewInt32(0)
+	shardCount := atomic.NewInt32(0)
 	call := func() (interface{}, error) {
 		foo++
 		time.Sleep(time.Millisecond * 5)

common/sockopt/reuseaddr_other.go

@@ -1,3 +1,4 @@
+//go:build !linux
 // +build !linux
 
 package sockopt

common/structure/structure.go

@@ -37,6 +37,12 @@ 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)

common/structure/structure_test.go

@@ -1,12 +1,15 @@
 package structure
 
 import (
-	"reflect"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
-var decoder = NewDecoder(Option{TagName: "test"})
+var (
-var weakTypeDecoder = NewDecoder(Option{TagName: "test", WeaklyTypedInput: true})
+	decoder         = NewDecoder(Option{TagName: "test"})
+	weakTypeDecoder = NewDecoder(Option{TagName: "test", WeaklyTypedInput: true})
+)
 
 type Baz struct {
 	Foo int    `test:"foo"`
@@ -37,12 +40,8 @@ func TestStructure_Basic(t *testing.T) {
 
 	s := &Baz{}
 	err := decoder.Decode(rawMap, s)
-	if err != nil {
+	assert.Nil(t, err)
-		t.Fatal(err.Error())
+	assert.Equal(t, goal, s)
-	}
-	if !reflect.DeepEqual(s, goal) {
-		t.Fatalf("bad: %#v", s)
-	}
 }
 
 func TestStructure_Slice(t *testing.T) {
@@ -58,12 +57,8 @@ func TestStructure_Slice(t *testing.T) {
 
 	s := &BazSlice{}
 	err := decoder.Decode(rawMap, s)
-	if err != nil {
+	assert.Nil(t, err)
-		t.Fatal(err.Error())
+	assert.Equal(t, goal, s)
-	}
-	if !reflect.DeepEqual(s, goal) {
-		t.Fatalf("bad: %#v", s)
-	}
 }
 
 func TestStructure_Optional(t *testing.T) {
@@ -77,12 +72,8 @@ func TestStructure_Optional(t *testing.T) {
 
 	s := &BazOptional{}
 	err := decoder.Decode(rawMap, s)
-	if err != nil {
+	assert.Nil(t, err)
-		t.Fatal(err.Error())
+	assert.Equal(t, goal, s)
-	}
-	if !reflect.DeepEqual(s, goal) {
-		t.Fatalf("bad: %#v", s)
-	}
 }
 
 func TestStructure_MissingKey(t *testing.T) {
@@ -92,18 +83,14 @@ func TestStructure_MissingKey(t *testing.T) {
 
 	s := &Baz{}
 	err := decoder.Decode(rawMap, s)
-	if err == nil {
+	assert.NotNilf(t, err, "should throw error: %#v", s)
-		t.Fatalf("should throw error: %#v", s)
-	}
 }
 
 func TestStructure_ParamError(t *testing.T) {
 	rawMap := map[string]interface{}{}
 	s := Baz{}
 	err := decoder.Decode(rawMap, s)
-	if err == nil {
+	assert.NotNilf(t, err, "should throw error: %#v", s)
-		t.Fatalf("should throw error: %#v", s)
-	}
 }
 
 func TestStructure_SliceTypeError(t *testing.T) {
@@ -114,9 +101,7 @@ func TestStructure_SliceTypeError(t *testing.T) {
 
 	s := &BazSlice{}
 	err := decoder.Decode(rawMap, s)
-	if err == nil {
+	assert.NotNilf(t, err, "should throw error: %#v", s)
-		t.Fatalf("should throw error: %#v", s)
-	}
 }
 
 func TestStructure_WeakType(t *testing.T) {
@@ -132,10 +117,23 @@ func TestStructure_WeakType(t *testing.T) {
 
 	s := &BazSlice{}
 	err := weakTypeDecoder.Decode(rawMap, s)
-	if err != nil {
+	assert.Nil(t, err)
-		t.Fatal(err.Error())
+	assert.Equal(t, goal, s)
-	}
+}
-	if !reflect.DeepEqual(s, goal) {
+
-		t.Fatalf("bad: %#v", s)
+func TestStructure_Nest(t *testing.T) {
-	}
+	rawMap := map[string]interface{}{
+		"foo": 1,
+	}
+
+	goal := BazOptional{
+		Foo: 1,
+	}
+
+	s := &struct {
+		BazOptional
+	}{}
+	err := decoder.Decode(rawMap, s)
+	assert.Nil(t, err)
+	assert.Equal(t, s.BazOptional, goal)
 }

component/dhcp/conn.go

@@ -0,0 +1,18 @@
+package dhcp
+
+import (
+	"context"
+	"net"
+	"runtime"
+
+	"github.com/Dreamacro/clash/component/dialer"
+)
+
+func ListenDHCPClient(ctx context.Context, ifaceName string) (net.PacketConn, error) {
+	listenAddr := "0.0.0.0:68"
+	if runtime.GOOS == "linux" || runtime.GOOS == "android" {
+		listenAddr = "255.255.255.255:68"
+	}
+
+	return dialer.ListenPacket(ctx, "udp4", listenAddr, dialer.WithInterface(ifaceName), dialer.WithAddrReuse(true))
+}

component/dhcp/dhcp.go

@@ -0,0 +1,88 @@
+package dhcp
+
+import (
+	"context"
+	"errors"
+	"net"
+
+	"github.com/Dreamacro/clash/component/iface"
+
+	"github.com/insomniacslk/dhcp/dhcpv4"
+)
+
+var (
+	ErrNotResponding = errors.New("DHCP not responding")
+	ErrNotFound      = errors.New("DNS option not found")
+)
+
+func ResolveDNSFromDHCP(context context.Context, ifaceName string) ([]net.IP, error) {
+	conn, err := ListenDHCPClient(context, ifaceName)
+	if err != nil {
+		return nil, err
+	}
+	defer conn.Close()
+
+	result := make(chan []net.IP, 1)
+
+	ifaceObj, err := iface.ResolveInterface(ifaceName)
+	if err != nil {
+		return nil, err
+	}
+
+	discovery, err := dhcpv4.NewDiscovery(ifaceObj.HardwareAddr, dhcpv4.WithBroadcast(true), dhcpv4.WithRequestedOptions(dhcpv4.OptionDomainNameServer))
+	if err != nil {
+		return nil, err
+	}
+
+	go receiveOffer(conn, discovery.TransactionID, result)
+
+	_, err = conn.WriteTo(discovery.ToBytes(), &net.UDPAddr{IP: net.IPv4bcast, Port: 67})
+	if err != nil {
+		return nil, err
+	}
+
+	select {
+	case r, ok := <-result:
+		if !ok {
+			return nil, ErrNotFound
+		}
+		return r, nil
+	case <-context.Done():
+		return nil, ErrNotResponding
+	}
+}
+
+func receiveOffer(conn net.PacketConn, id dhcpv4.TransactionID, result chan<- []net.IP) {
+	defer close(result)
+
+	buf := make([]byte, dhcpv4.MaxMessageSize)
+
+	for {
+		n, _, err := conn.ReadFrom(buf)
+		if err != nil {
+			return
+		}
+
+		pkt, err := dhcpv4.FromBytes(buf[:n])
+		if err != nil {
+			continue
+		}
+
+		if pkt.MessageType() != dhcpv4.MessageTypeOffer {
+			continue
+		}
+
+		if pkt.TransactionID != id {
+			continue
+		}
+
+		dns := pkt.DNS()
+		if len(dns) == 0 {
+			return
+		}
+
+		result <- dns
+
+		return
+	}
+}

component/dialer/bind.go

@@ -1,118 +0,0 @@
-package dialer
-
-import (
-	"errors"
-	"net"
-	"time"
-
-	"github.com/Dreamacro/clash/common/singledo"
-)
-
-// In some OS, such as Windows, it takes a little longer to get interface information
-var ifaceSingle = singledo.NewSingle(time.Second * 20)
-
-var (
-	errPlatformNotSupport = errors.New("unsupport platform")
-)
-
-func lookupTCPAddr(ip net.IP, addrs []net.Addr) (*net.TCPAddr, error) {
-	ipv4 := ip.To4() != nil
-
-	for _, elm := range addrs {
-		addr, ok := elm.(*net.IPNet)
-		if !ok {
-			continue
-		}
-
-		addrV4 := addr.IP.To4() != nil
-
-		if addrV4 && ipv4 {
-			return &net.TCPAddr{IP: addr.IP, Port: 0}, nil
-		} else if !addrV4 && !ipv4 {
-			return &net.TCPAddr{IP: addr.IP, Port: 0}, nil
-		}
-	}
-
-	return nil, ErrAddrNotFound
-}
-
-func lookupUDPAddr(ip net.IP, addrs []net.Addr) (*net.UDPAddr, error) {
-	ipv4 := ip.To4() != nil
-
-	for _, elm := range addrs {
-		addr, ok := elm.(*net.IPNet)
-		if !ok {
-			continue
-		}
-
-		addrV4 := addr.IP.To4() != nil
-
-		if addrV4 && ipv4 {
-			return &net.UDPAddr{IP: addr.IP, Port: 0}, nil
-		} else if !addrV4 && !ipv4 {
-			return &net.UDPAddr{IP: addr.IP, Port: 0}, nil
-		}
-	}
-
-	return nil, ErrAddrNotFound
-}
-
-func fallbackBindToDialer(dialer *net.Dialer, network string, ip net.IP, name string) error {
-	if !ip.IsGlobalUnicast() {
-		return nil
-	}
-
-	iface, err, _ := ifaceSingle.Do(func() (interface{}, error) {
-		return net.InterfaceByName(name)
-	})
-	if err != nil {
-		return err
-	}
-
-	addrs, err := iface.(*net.Interface).Addrs()
-	if err != nil {
-		return err
-	}
-
-	switch network {
-	case "tcp", "tcp4", "tcp6":
-		if addr, err := lookupTCPAddr(ip, addrs); err == nil {
-			dialer.LocalAddr = addr
-		} else {
-			return err
-		}
-	case "udp", "udp4", "udp6":
-		if addr, err := lookupUDPAddr(ip, addrs); err == nil {
-			dialer.LocalAddr = addr
-		} else {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func fallbackBindToListenConfig(name string) (string, error) {
-	iface, err, _ := ifaceSingle.Do(func() (interface{}, error) {
-		return net.InterfaceByName(name)
-	})
-	if err != nil {
-		return "", err
-	}
-
-	addrs, err := iface.(*net.Interface).Addrs()
-	if err != nil {
-		return "", err
-	}
-
-	for _, elm := range addrs {
-		addr, ok := elm.(*net.IPNet)
-		if !ok || addr.IP.To4() == nil {
-			continue
-		}
-
-		return net.JoinHostPort(addr.IP.String(), "0"), nil
-	}
-
-	return "", ErrAddrNotFound
-}

component/dialer/bind_darwin.go

@@ -3,51 +3,57 @@ package dialer
 import (
 	"net"
 	"syscall"
+
+	"golang.org/x/sys/unix"
+
+	"github.com/Dreamacro/clash/component/iface"
 )
 
 type controlFn = func(network, address string, c syscall.RawConn) error
 
-func bindControl(ifaceIdx int) controlFn {
+func bindControl(ifaceIdx int, chain controlFn) controlFn {
-	return func(network, address string, c syscall.RawConn) error {
+	return func(network, address string, c syscall.RawConn) (err error) {
+		defer func() {
+			if err == nil && chain != nil {
+				err = chain(network, address, c)
+			}
+		}()
+
 		ipStr, _, err := net.SplitHostPort(address)
 		if err == nil {
 			ip := net.ParseIP(ipStr)
 			if ip != nil && !ip.IsGlobalUnicast() {
-				return nil
+				return
 			}
 		}
 
 		return c.Control(func(fd uintptr) {
 			switch network {
 			case "tcp4", "udp4":
-				syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IP, syscall.IP_BOUND_IF, ifaceIdx)
+				unix.SetsockoptInt(int(fd), unix.IPPROTO_IP, unix.IP_BOUND_IF, ifaceIdx)
 			case "tcp6", "udp6":
-				syscall.SetsockoptInt(int(fd), syscall.IPPROTO_IPV6, syscall.IPV6_BOUND_IF, ifaceIdx)
+				unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_BOUND_IF, ifaceIdx)
 			}
 		})
 	}
 }
 
-func bindIfaceToDialer(dialer *net.Dialer, ifaceName string) error {
+func bindIfaceToDialer(ifaceName string, dialer *net.Dialer, _ string, _ net.IP) error {
-	iface, err, _ := ifaceSingle.Do(func() (interface{}, error) {
+	ifaceObj, err := iface.ResolveInterface(ifaceName)
-		return net.InterfaceByName(ifaceName)
-	})
 	if err != nil {
 		return err
 	}
 
-	dialer.Control = bindControl(iface.(*net.Interface).Index)
+	dialer.Control = bindControl(ifaceObj.Index, dialer.Control)
 	return nil
 }
 
-func bindIfaceToListenConfig(lc *net.ListenConfig, ifaceName string) error {
+func bindIfaceToListenConfig(ifaceName string, lc *net.ListenConfig, _, address string) (string, error) {
-	iface, err, _ := ifaceSingle.Do(func() (interface{}, error) {
+	ifaceObj, err := iface.ResolveInterface(ifaceName)
-		return net.InterfaceByName(ifaceName)
-	})
 	if err != nil {
-		return err
+		return "", err
 	}
 
-	lc.Control = bindControl(iface.(*net.Interface).Index)
+	lc.Control = bindControl(ifaceObj.Index, lc.Control)
-	return nil
+	return address, nil
 }

component/dialer/bind_linux.go

@@ -3,34 +3,42 @@ package dialer
 import (
 	"net"
 	"syscall"
+
+	"golang.org/x/sys/unix"
 )
 
 type controlFn = func(network, address string, c syscall.RawConn) error
 
-func bindControl(ifaceName string) controlFn {
+func bindControl(ifaceName string, chain controlFn) controlFn {
-	return func(network, address string, c syscall.RawConn) error {
+	return func(network, address string, c syscall.RawConn) (err error) {
+		defer func() {
+			if err == nil && chain != nil {
+				err = chain(network, address, c)
+			}
+		}()
+
 		ipStr, _, err := net.SplitHostPort(address)
 		if err == nil {
 			ip := net.ParseIP(ipStr)
 			if ip != nil && !ip.IsGlobalUnicast() {
-				return nil
+				return
 			}
 		}
 
 		return c.Control(func(fd uintptr) {
-			syscall.BindToDevice(int(fd), ifaceName)
+			unix.BindToDevice(int(fd), ifaceName)
 		})
 	}
 }
 
-func bindIfaceToDialer(dialer *net.Dialer, ifaceName string) error {
+func bindIfaceToDialer(ifaceName string, dialer *net.Dialer, _ string, _ net.IP) error {
-	dialer.Control = bindControl(ifaceName)
+	dialer.Control = bindControl(ifaceName, dialer.Control)
 
 	return nil
 }
 
-func bindIfaceToListenConfig(lc *net.ListenConfig, ifaceName string) error {
+func bindIfaceToListenConfig(ifaceName string, lc *net.ListenConfig, _, address string) (string, error) {
-	lc.Control = bindControl(ifaceName)
+	lc.Control = bindControl(ifaceName, lc.Control)
 
-	return nil
+	return address, nil
 }

component/dialer/bind_others.go

@@ -1,13 +1,93 @@
+//go:build !linux && !darwin
 // +build !linux,!darwin
 
 package dialer
 
-import "net"
+import (
+	"net"
+	"strconv"
+	"strings"
 
-func bindIfaceToDialer(dialer *net.Dialer, ifaceName string) error {
+	"github.com/Dreamacro/clash/component/iface"
-	return errPlatformNotSupport
+)
+
+func lookupLocalAddr(ifaceName string, network string, destination net.IP, port int) (net.Addr, error) {
+	ifaceObj, err := iface.ResolveInterface(ifaceName)
+	if err != nil {
+		return nil, err
+	}
+
+	var addr *net.IPNet
+	switch network {
+	case "udp4", "tcp4":
+		addr, err = ifaceObj.PickIPv4Addr(destination)
+	case "tcp6", "udp6":
+		addr, err = ifaceObj.PickIPv6Addr(destination)
+	default:
+		if destination != nil {
+			if destination.To4() != nil {
+				addr, err = ifaceObj.PickIPv4Addr(destination)
+			} else {
+				addr, err = ifaceObj.PickIPv6Addr(destination)
+			}
+		} else {
+			addr, err = ifaceObj.PickIPv4Addr(destination)
+		}
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	if strings.HasPrefix(network, "tcp") {
+		return &net.TCPAddr{
+			IP:   addr.IP,
+			Port: port,
+		}, nil
+	} else if strings.HasPrefix(network, "udp") {
+		return &net.UDPAddr{
+			IP:   addr.IP,
+			Port: port,
+		}, nil
+	}
+
+	return nil, iface.ErrAddrNotFound
 }
 
-func bindIfaceToListenConfig(lc *net.ListenConfig, ifaceName string) error {
+func bindIfaceToDialer(ifaceName string, dialer *net.Dialer, network string, destination net.IP) error {
-	return errPlatformNotSupport
+	if !destination.IsGlobalUnicast() {
+		return nil
+	}
+
+	local := int64(0)
+	if dialer.LocalAddr != nil {
+		_, port, err := net.SplitHostPort(dialer.LocalAddr.String())
+		if err == nil {
+			local, _ = strconv.ParseInt(port, 10, 16)
+		}
+	}
+
+	addr, err := lookupLocalAddr(ifaceName, network, destination, int(local))
+	if err != nil {
+		return err
+	}
+
+	dialer.LocalAddr = addr
+
+	return nil
+}
+
+func bindIfaceToListenConfig(ifaceName string, _ *net.ListenConfig, network, address string) (string, error) {
+	_, port, err := net.SplitHostPort(address)
+	if err != nil {
+		port = "0"
+	}
+
+	local, _ := strconv.ParseInt(port, 10, 16)
+
+	addr, err := lookupLocalAddr(ifaceName, network, nil, int(local))
+	if err != nil {
+		return "", err
+	}
+
+	return addr.String(), nil
 }

component/dialer/dialer.go

@@ -8,22 +8,7 @@ import (
 	"github.com/Dreamacro/clash/component/resolver"
 )
 
-func Dialer() (*net.Dialer, error) {
+func DialContext(ctx context.Context, network, address string, options ...Option) (net.Conn, error) {
-	dialer := &net.Dialer{}
-	if DialerHook != nil {
-		if err := DialerHook(dialer); err != nil {
-			return nil, err
-		}
-	}
-
-	return dialer, nil
-}
-
-func Dial(network, address string) (net.Conn, error) {
-	return DialContext(context.Background(), network, address)
-}
-
-func DialContext(ctx context.Context, network, address string) (net.Conn, error) {
 	switch network {
 	case "tcp4", "tcp6", "udp4", "udp6":
 		host, port, err := net.SplitHostPort(address)
@@ -31,11 +16,6 @@ func DialContext(ctx context.Context, network, address string) (net.Conn, error)
 			return nil, err
 		}
 
-		dialer, err := Dialer()
-		if err != nil {
-			return nil, err
-		}
-
 		var ip net.IP
 		switch network {
 		case "tcp4", "udp4":
@@ -43,38 +23,76 @@ func DialContext(ctx context.Context, network, address string) (net.Conn, error)
 		default:
 			ip, err = resolver.ResolveIPv6(host)
 		}
-
 		if err != nil {
 			return nil, err
 		}
 
-		if DialHook != nil {
+		return dialContext(ctx, network, ip, port, options)
-			if err := DialHook(dialer, network, ip); err != nil {
-				return nil, err
-			}
-		}
-		return dialer.DialContext(ctx, network, net.JoinHostPort(ip.String(), port))
 	case "tcp", "udp":
-		return dualStackDialContext(ctx, network, address)
+		return dualStackDialContext(ctx, network, address, options)
 	default:
 		return nil, errors.New("network invalid")
 	}
 }
 
-func ListenPacket(network, address string) (net.PacketConn, error) {
+func ListenPacket(ctx context.Context, network, address string, options ...Option) (net.PacketConn, error) {
-	cfg := &net.ListenConfig{}
+	cfg := &option{
-	if ListenPacketHook != nil {
+		interfaceName: DefaultInterface.Load(),
-		var err error
+	}
-		address, err = ListenPacketHook(cfg, address)
+
+	for _, o := range DefaultOptions {
+		o(cfg)
+	}
+
+	for _, o := range options {
+		o(cfg)
+	}
+
+	lc := &net.ListenConfig{}
+	if cfg.interfaceName != "" {
+		addr, err := bindIfaceToListenConfig(cfg.interfaceName, lc, network, address)
 		if err != nil {
 			return nil, err
 		}
+		address = addr
+	}
+	if cfg.addrReuse {
+		addrReuseToListenConfig(lc)
+	}
+	if cfg.routingMark != 0 {
+		bindMarkToListenConfig(cfg.routingMark, lc, network, address)
 	}
 
-	return cfg.ListenPacket(context.Background(), network, address)
+	return lc.ListenPacket(ctx, network, address)
 }
 
-func dualStackDialContext(ctx context.Context, network, address string) (net.Conn, error) {
+func dialContext(ctx context.Context, network string, destination net.IP, port string, options []Option) (net.Conn, error) {
+	opt := &option{
+		interfaceName: DefaultInterface.Load(),
+	}
+
+	for _, o := range DefaultOptions {
+		o(opt)
+	}
+
+	for _, o := range options {
+		o(opt)
+	}
+
+	dialer := &net.Dialer{}
+	if opt.interfaceName != "" {
+		if err := bindIfaceToDialer(opt.interfaceName, dialer, network, destination); err != nil {
+			return nil, err
+		}
+	}
+	if opt.routingMark != 0 {
+		bindMarkToDialer(opt.routingMark, dialer, network, destination)
+	}
+
+	return dialer.DialContext(ctx, network, net.JoinHostPort(destination.String(), port))
+}
+
+func dualStackDialContext(ctx context.Context, network, address string, options []Option) (net.Conn, error) {
 	host, port, err := net.SplitHostPort(address)
 	if err != nil {
 		return nil, err
@@ -105,12 +123,6 @@ func dualStackDialContext(ctx context.Context, network, address string) (net.Con
 			}
 		}()
 
-		dialer, err := Dialer()
-		if err != nil {
-			result.error = err
-			return
-		}
-
 		var ip net.IP
 		if ipv6 {
 			ip, result.error = resolver.ResolveIPv6(host)
@@ -122,12 +134,7 @@ func dualStackDialContext(ctx context.Context, network, address string) (net.Con
 		}
 		result.resolved = true
 
-		if DialHook != nil {
+		result.Conn, result.error = dialContext(ctx, network, ip, port, options)
-			if result.error = DialHook(dialer, network, ip); result.error != nil {
-				return
-			}
-		}
-		result.Conn, result.error = dialer.DialContext(ctx, network, net.JoinHostPort(ip.String(), port))
 	}
 
 	go startRacer(ctx, network+"4", host, false)

component/dialer/hook.go

@@ -1,43 +0,0 @@
-package dialer
-
-import (
-	"errors"
-	"net"
-)
-
-type DialerHookFunc = func(dialer *net.Dialer) error
-type DialHookFunc = func(dialer *net.Dialer, network string, ip net.IP) error
-type ListenPacketHookFunc = func(lc *net.ListenConfig, address string) (string, error)
-
-var (
-	DialerHook       DialerHookFunc
-	DialHook         DialHookFunc
-	ListenPacketHook ListenPacketHookFunc
-)
-
-var (
-	ErrAddrNotFound      = errors.New("addr not found")
-	ErrNetworkNotSupport = errors.New("network not support")
-)
-
-func ListenPacketWithInterface(name string) ListenPacketHookFunc {
-	return func(lc *net.ListenConfig, address string) (string, error) {
-		err := bindIfaceToListenConfig(lc, name)
-		if err == errPlatformNotSupport {
-			address, err = fallbackBindToListenConfig(name)
-		}
-
-		return address, err
-	}
-}
-
-func DialerWithInterface(name string) DialHookFunc {
-	return func(dialer *net.Dialer, network string, ip net.IP) error {
-		err := bindIfaceToDialer(dialer, name)
-		if err == errPlatformNotSupport {
-			err = fallbackBindToDialer(dialer, network, ip, name)
-		}
-
-		return err
-	}
-}

component/dialer/mark_linux.go

@@ -0,0 +1,44 @@
+//go:build linux
+// +build linux
+
+package dialer
+
+import (
+	"net"
+	"syscall"
+)
+
+func bindMarkToDialer(mark int, dialer *net.Dialer, _ string, _ net.IP) {
+	dialer.Control = bindMarkToControl(mark, dialer.Control)
+}
+
+func bindMarkToListenConfig(mark int, lc *net.ListenConfig, _, address string) {
+	lc.Control = bindMarkToControl(mark, lc.Control)
+}
+
+func bindMarkToControl(mark int, chain controlFn) controlFn {
+	return func(network, address string, c syscall.RawConn) (err error) {
+		defer func() {
+			if err == nil && chain != nil {
+				err = chain(network, address, c)
+			}
+		}()
+
+		ipStr, _, err := net.SplitHostPort(address)
+		if err == nil {
+			ip := net.ParseIP(ipStr)
+			if ip != nil && !ip.IsGlobalUnicast() {
+				return
+			}
+		}
+
+		return c.Control(func(fd uintptr) {
+			switch network {
+			case "tcp4", "udp4":
+				syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_MARK, mark)
+			case "tcp6", "udp6":
+				syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_MARK, mark)
+			}
+		})
+	}
+}

component/dialer/mark_nonlinux.go

@@ -0,0 +1,27 @@
+//go:build !linux
+// +build !linux
+
+package dialer
+
+import (
+	"net"
+	"sync"
+
+	"github.com/Dreamacro/clash/log"
+)
+
+var printMarkWarnOnce sync.Once
+
+func printMarkWarn() {
+	printMarkWarnOnce.Do(func() {
+		log.Warnln("Routing mark on socket is not supported on current platform")
+	})
+}
+
+func bindMarkToDialer(mark int, dialer *net.Dialer, _ string, _ net.IP) {
+	printMarkWarn()
+}
+
+func bindMarkToListenConfig(mark int, lc *net.ListenConfig, _, address string) {
+	printMarkWarn()
+}

component/dialer/options.go

@@ -0,0 +1,34 @@
+package dialer
+
+import "go.uber.org/atomic"
+
+var (
+	DefaultOptions   []Option
+	DefaultInterface = atomic.NewString("")
+)
+
+type option struct {
+	interfaceName string
+	addrReuse     bool
+	routingMark   int
+}
+
+type Option func(opt *option)
+
+func WithInterface(name string) Option {
+	return func(opt *option) {
+		opt.interfaceName = name
+	}
+}
+
+func WithAddrReuse(reuse bool) Option {
+	return func(opt *option) {
+		opt.addrReuse = reuse
+	}
+}
+
+func WithRoutingMark(mark int) Option {
+	return func(opt *option) {
+		opt.routingMark = mark
+	}
+}

component/dialer/reuse_others.go

@@ -0,0 +1,10 @@
+//go:build !darwin && !dragonfly && !freebsd && !linux && !netbsd && !openbsd && !solaris && !windows
+// +build !darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris,!windows
+
+package dialer
+
+import (
+	"net"
+)
+
+func addrReuseToListenConfig(*net.ListenConfig) {}

component/dialer/reuse_unix.go

@@ -0,0 +1,28 @@
+//go:build darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
+
+package dialer
+
+import (
+	"net"
+	"syscall"
+
+	"golang.org/x/sys/unix"
+)
+
+func addrReuseToListenConfig(lc *net.ListenConfig) {
+	chain := lc.Control
+
+	lc.Control = func(network, address string, c syscall.RawConn) (err error) {
+		defer func() {
+			if err == nil && chain != nil {
+				err = chain(network, address, c)
+			}
+		}()
+
+		return c.Control(func(fd uintptr) {
+			unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEADDR, 1)
+			unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_REUSEPORT, 1)
+		})
+	}
+}

component/dialer/reuse_windows.go

@@ -0,0 +1,24 @@
+package dialer
+
+import (
+	"net"
+	"syscall"
+
+	"golang.org/x/sys/windows"
+)
+
+func addrReuseToListenConfig(lc *net.ListenConfig) {
+	chain := lc.Control
+
+	lc.Control = func(network, address string, c syscall.RawConn) (err error) {
+		defer func() {
+			if err == nil && chain != nil {
+				err = chain(network, address, c)
+			}
+		}()
+
+		return c.Control(func(fd uintptr) {
+			windows.SetsockoptInt(windows.Handle(fd), windows.SOL_SOCKET, windows.SO_REUSEADDR, 1)
+		})
+	}
+}

component/fakeip/cachefile.go

@@ -0,0 +1,49 @@
+package fakeip
+
+import (
+	"net"
+
+	"github.com/Dreamacro/clash/component/profile/cachefile"
+)
+
+type cachefileStore struct {
+	cache *cachefile.CacheFile
+}
+
+// GetByHost implements store.GetByHost
+func (c *cachefileStore) GetByHost(host string) (net.IP, bool) {
+	elm := c.cache.GetFakeip([]byte(host))
+	if elm == nil {
+		return nil, false
+	}
+	return net.IP(elm), true
+}
+
+// PutByHost implements store.PutByHost
+func (c *cachefileStore) PutByHost(host string, ip net.IP) {
+	c.cache.PutFakeip([]byte(host), ip)
+}
+
+// GetByIP implements store.GetByIP
+func (c *cachefileStore) GetByIP(ip net.IP) (string, bool) {
+	elm := c.cache.GetFakeip(ip.To4())
+	if elm == nil {
+		return "", false
+	}
+	return string(elm), true
+}
+
+// PutByIP implements store.PutByIP
+func (c *cachefileStore) PutByIP(ip net.IP, host string) {
+	c.cache.PutFakeip(ip.To4(), []byte(host))
+}
+
+// Exist implements store.Exist
+func (c *cachefileStore) Exist(ip net.IP) bool {
+	_, exist := c.GetByIP(ip)
+	return exist
+}
+
+// CloneTo implements store.CloneTo
+// already persistence
+func (c *cachefileStore) CloneTo(store store) {}

component/fakeip/memory.go

@@ -0,0 +1,60 @@
+package fakeip
+
+import (
+	"net"
+
+	"github.com/Dreamacro/clash/common/cache"
+)
+
+type memoryStore struct {
+	cache *cache.LruCache
+}
+
+// GetByHost implements store.GetByHost
+func (m *memoryStore) GetByHost(host string) (net.IP, bool) {
+	if elm, exist := m.cache.Get(host); exist {
+		ip := elm.(net.IP)
+
+		// ensure ip --> host on head of linked list
+		m.cache.Get(ipToUint(ip.To4()))
+		return ip, true
+	}
+
+	return nil, false
+}
+
+// PutByHost implements store.PutByHost
+func (m *memoryStore) PutByHost(host string, ip net.IP) {
+	m.cache.Set(host, ip)
+}
+
+// GetByIP implements store.GetByIP
+func (m *memoryStore) GetByIP(ip net.IP) (string, bool) {
+	if elm, exist := m.cache.Get(ipToUint(ip.To4())); exist {
+		host := elm.(string)
+
+		// ensure host --> ip on head of linked list
+		m.cache.Get(host)
+		return host, true
+	}
+
+	return "", false
+}
+
+// PutByIP implements store.PutByIP
+func (m *memoryStore) PutByIP(ip net.IP, host string) {
+	m.cache.Set(ipToUint(ip.To4()), host)
+}
+
+// Exist implements store.Exist
+func (m *memoryStore) Exist(ip net.IP) bool {
+	return m.cache.Exist(ipToUint(ip.To4()))
+}
+
+// CloneTo implements store.CloneTo
+// only for memoryStore to memoryStore
+func (m *memoryStore) CloneTo(store store) {
+	if ms, ok := store.(*memoryStore); ok {
+		m.cache.CloneTo(ms.cache)
+	}
+}

component/fakeip/pool.go

@@ -6,9 +6,19 @@ import (
 	"sync"
 
 	"github.com/Dreamacro/clash/common/cache"
+	"github.com/Dreamacro/clash/component/profile/cachefile"
 	"github.com/Dreamacro/clash/component/trie"
 )
 
+type store interface {
+	GetByHost(host string) (net.IP, bool)
+	PutByHost(host string, ip net.IP)
+	GetByIP(ip net.IP) (string, bool)
+	PutByIP(ip net.IP, host string)
+	Exist(ip net.IP) bool
+	CloneTo(store)
+}
+
 // Pool is a implementation about fake ip generator without storage
 type Pool struct {
 	max     uint32
@@ -18,25 +28,19 @@ type Pool struct {
 	mux     sync.Mutex
 	host    *trie.DomainTrie
 	ipnet   *net.IPNet
-	cache   *cache.LruCache
+	store   store
 }
 
 // Lookup return a fake ip with host
 func (p *Pool) Lookup(host string) net.IP {
 	p.mux.Lock()
 	defer p.mux.Unlock()
-	if elm, exist := p.cache.Get(host); exist {
+	if ip, exist := p.store.GetByHost(host); exist {
-		ip := elm.(net.IP)
-
-		// ensure ip --> host on head of linked list
-		n := ipToUint(ip.To4())
-		offset := n - p.min + 1
-		p.cache.Get(offset)
 		return ip
 	}
 
 	ip := p.get(host)
-	p.cache.Set(host, ip)
+	p.store.PutByHost(host, ip)
 	return ip
 }
 
@@ -49,22 +53,11 @@ func (p *Pool) LookBack(ip net.IP) (string, bool) {
 		return "", false
 	}
 
-	n := ipToUint(ip.To4())
+	return p.store.GetByIP(ip)
-	offset := n - p.min + 1
-
-	if elm, exist := p.cache.Get(offset); exist {
-		host := elm.(string)
-
-		// ensure host --> ip on head of linked list
-		p.cache.Get(host)
-		return host, true
-	}
-
-	return "", false
 }
 
-// LookupHost return if domain in host
+// ShouldSkipped return if domain should be skipped
-func (p *Pool) LookupHost(domain string) bool {
+func (p *Pool) ShouldSkipped(domain string) bool {
 	if p.host == nil {
 		return false
 	}
@@ -80,9 +73,7 @@ func (p *Pool) Exist(ip net.IP) bool {
 		return false
 	}
 
-	n := ipToUint(ip.To4())
+	return p.store.Exist(ip)
-	offset := n - p.min + 1
-	return p.cache.Exist(offset)
 }
 
 // Gateway return gateway ip
@@ -95,9 +86,9 @@ func (p *Pool) IPNet() *net.IPNet {
 	return p.ipnet
 }
 
-// PatchFrom clone cache from old pool
+// CloneFrom clone cache from old pool
-func (p *Pool) PatchFrom(o *Pool) {
+func (p *Pool) CloneFrom(o *Pool) {
-	o.cache.CloneTo(p.cache)
+	o.store.CloneTo(p.store)
 }
 
 func (p *Pool) get(host string) net.IP {
@@ -109,12 +100,13 @@ func (p *Pool) get(host string) net.IP {
 			break
 		}
 
-		if !p.cache.Exist(p.offset) {
+		ip := uintToIP(p.min + p.offset - 1)
+		if !p.store.Exist(ip) {
 			break
 		}
 	}
 	ip := uintToIP(p.min + p.offset - 1)
-	p.cache.Set(p.offset, host)
+	p.store.PutByIP(ip, host)
 	return ip
 }
 
@@ -130,11 +122,24 @@ func uintToIP(v uint32) net.IP {
 	return net.IP{byte(v >> 24), byte(v >> 16), byte(v >> 8), byte(v)}
 }
 
-// New return Pool instance
+type Options struct {
-func New(ipnet *net.IPNet, size int, host *trie.DomainTrie) (*Pool, error) {
+	IPNet *net.IPNet
-	min := ipToUint(ipnet.IP) + 2
+	Host  *trie.DomainTrie
 
-	ones, bits := ipnet.Mask.Size()
+	// Size sets the maximum number of entries in memory
+	// and does not work if Persistence is true
+	Size int
+
+	// Persistence will save the data to disk.
+	// Size will not work and record will be fully stored.
+	Persistence bool
+}
+
+// New return Pool instance
+func New(options Options) (*Pool, error) {
+	min := ipToUint(options.IPNet.IP) + 2
+
+	ones, bits := options.IPNet.Mask.Size()
 	total := 1<<uint(bits-ones) - 2
 
 	if total <= 0 {
@@ -142,12 +147,22 @@ func New(ipnet *net.IPNet, size int, host *trie.DomainTrie) (*Pool, error) {
 	}
 
 	max := min + uint32(total) - 1
-	return &Pool{
+	pool := &Pool{
 		min:     min,
 		max:     max,
 		gateway: min - 1,
-		host:    host,
+		host:    options.Host,
-		ipnet:   ipnet,
+		ipnet:   options.IPNet,
-		cache:   cache.NewLRUCache(cache.WithSize(size * 2)),
+	}
-	}, nil
+	if options.Persistence {
+		pool.store = &cachefileStore{
+			cache: cachefile.Cache(),
+		}
+	} else {
+		pool.store = &memoryStore{
+			cache: cache.NewLRUCache(cache.WithSize(options.Size * 2)),
+		}
+	}
+
+	return pool, nil
 }

component/fakeip/pool_test.go

@@ -2,38 +2,118 @@ package fakeip
 
 import (
 	"net"
+	"os"
 	"testing"
+	"time"
+
+	"github.com/Dreamacro/clash/component/profile/cachefile"
+	"github.com/Dreamacro/clash/component/trie"
 
 	"github.com/stretchr/testify/assert"
+	"go.etcd.io/bbolt"
 )
 
+func createPools(options Options) ([]*Pool, string, error) {
+	pool, err := New(options)
+	if err != nil {
+		return nil, "", err
+	}
+	filePool, tempfile, err := createCachefileStore(options)
+	if err != nil {
+		return nil, "", err
+	}
+
+	return []*Pool{pool, filePool}, tempfile, nil
+}
+
+func createCachefileStore(options Options) (*Pool, string, error) {
+	pool, err := New(options)
+	if err != nil {
+		return nil, "", err
+	}
+	f, err := os.CreateTemp("", "clash")
+	if err != nil {
+		return nil, "", err
+	}
+
+	db, err := bbolt.Open(f.Name(), 0o666, &bbolt.Options{Timeout: time.Second})
+	if err != nil {
+		return nil, "", err
+	}
+
+	pool.store = &cachefileStore{
+		cache: &cachefile.CacheFile{DB: db},
+	}
+	return pool, f.Name(), nil
+}
+
 func TestPool_Basic(t *testing.T) {
 	_, ipnet, _ := net.ParseCIDR("192.168.0.1/29")
-	pool, _ := New(ipnet, 10, nil)
+	pools, tempfile, err := createPools(Options{
+		IPNet: ipnet,
+		Size:  10,
+	})
+	assert.Nil(t, err)
+	defer os.Remove(tempfile)
 
-	first := pool.Lookup("foo.com")
+	for _, pool := range pools {
-	last := pool.Lookup("bar.com")
+		first := pool.Lookup("foo.com")
-	bar, exist := pool.LookBack(last)
+		last := pool.Lookup("bar.com")
+		bar, exist := pool.LookBack(last)
 
-	assert.True(t, first.Equal(net.IP{192, 168, 0, 2}))
+		assert.True(t, first.Equal(net.IP{192, 168, 0, 2}))
-	assert.True(t, last.Equal(net.IP{192, 168, 0, 3}))
+		assert.Equal(t, pool.Lookup("foo.com"), net.IP{192, 168, 0, 2})
-	assert.True(t, exist)
+		assert.True(t, last.Equal(net.IP{192, 168, 0, 3}))
-	assert.Equal(t, bar, "bar.com")
+		assert.True(t, exist)
+		assert.Equal(t, bar, "bar.com")
+		assert.Equal(t, pool.Gateway(), net.IP{192, 168, 0, 1})
+		assert.Equal(t, pool.IPNet().String(), ipnet.String())
+		assert.True(t, pool.Exist(net.IP{192, 168, 0, 3}))
+		assert.False(t, pool.Exist(net.IP{192, 168, 0, 4}))
+		assert.False(t, pool.Exist(net.ParseIP("::1")))
+	}
 }
 
-func TestPool_Cycle(t *testing.T) {
+func TestPool_CycleUsed(t *testing.T) {
 	_, ipnet, _ := net.ParseCIDR("192.168.0.1/30")
-	pool, _ := New(ipnet, 10, nil)
+	pools, tempfile, err := createPools(Options{
+		IPNet: ipnet,
+		Size:  10,
+	})
+	assert.Nil(t, err)
+	defer os.Remove(tempfile)
 
-	first := pool.Lookup("foo.com")
+	for _, pool := range pools {
-	same := pool.Lookup("baz.com")
+		first := pool.Lookup("foo.com")
+		same := pool.Lookup("baz.com")
+		assert.True(t, first.Equal(same))
+	}
+}
 
-	assert.True(t, first.Equal(same))
+func TestPool_Skip(t *testing.T) {
+	_, ipnet, _ := net.ParseCIDR("192.168.0.1/30")
+	tree := trie.New()
+	tree.Insert("example.com", tree)
+	pools, tempfile, err := createPools(Options{
+		IPNet: ipnet,
+		Size:  10,
+		Host:  tree,
+	})
+	assert.Nil(t, err)
+	defer os.Remove(tempfile)
+
+	for _, pool := range pools {
+		assert.True(t, pool.ShouldSkipped("example.com"))
+		assert.False(t, pool.ShouldSkipped("foo.com"))
+	}
 }
 
 func TestPool_MaxCacheSize(t *testing.T) {
 	_, ipnet, _ := net.ParseCIDR("192.168.0.1/24")
-	pool, _ := New(ipnet, 2, nil)
+	pool, _ := New(Options{
+		IPNet: ipnet,
+		Size:  2,
+	})
 
 	first := pool.Lookup("foo.com")
 	pool.Lookup("bar.com")
@@ -45,7 +125,10 @@ func TestPool_MaxCacheSize(t *testing.T) {
 
 func TestPool_DoubleMapping(t *testing.T) {
 	_, ipnet, _ := net.ParseCIDR("192.168.0.1/24")
-	pool, _ := New(ipnet, 2, nil)
+	pool, _ := New(Options{
+		IPNet: ipnet,
+		Size:  2,
+	})
 
 	// fill cache
 	fooIP := pool.Lookup("foo.com")
@@ -70,9 +153,35 @@ func TestPool_DoubleMapping(t *testing.T) {
 	assert.False(t, bazIP.Equal(newBazIP))
 }
 
+func TestPool_Clone(t *testing.T) {
+	_, ipnet, _ := net.ParseCIDR("192.168.0.1/24")
+	pool, _ := New(Options{
+		IPNet: ipnet,
+		Size:  2,
+	})
+
+	first := pool.Lookup("foo.com")
+	last := pool.Lookup("bar.com")
+	assert.True(t, first.Equal(net.IP{192, 168, 0, 2}))
+	assert.True(t, last.Equal(net.IP{192, 168, 0, 3}))
+
+	newPool, _ := New(Options{
+		IPNet: ipnet,
+		Size:  2,
+	})
+	newPool.CloneFrom(pool)
+	_, firstExist := newPool.LookBack(first)
+	_, lastExist := newPool.LookBack(last)
+	assert.True(t, firstExist)
+	assert.True(t, lastExist)
+}
+
 func TestPool_Error(t *testing.T) {
 	_, ipnet, _ := net.ParseCIDR("192.168.0.1/31")
-	_, err := New(ipnet, 10, nil)
+	_, err := New(Options{
+		IPNet: ipnet,
+		Size:  10,
+	})
 
 	assert.Error(t, err)
 }

component/iface/iface.go

@@ -0,0 +1,115 @@
+package iface
+
+import (
+	"errors"
+	"net"
+	"time"
+
+	"github.com/Dreamacro/clash/common/singledo"
+)
+
+type Interface struct {
+	Index        int
+	Name         string
+	Addrs        []*net.IPNet
+	HardwareAddr net.HardwareAddr
+}
+
+var (
+	ErrIfaceNotFound = errors.New("interface not found")
+	ErrAddrNotFound  = errors.New("addr not found")
+)
+
+var interfaces = singledo.NewSingle(time.Second * 20)
+
+func ResolveInterface(name string) (*Interface, error) {
+	value, err, _ := interfaces.Do(func() (interface{}, error) {
+		ifaces, err := net.Interfaces()
+		if err != nil {
+			return nil, err
+		}
+
+		r := map[string]*Interface{}
+
+		for _, iface := range ifaces {
+			addrs, err := iface.Addrs()
+			if err != nil {
+				continue
+			}
+
+			ipNets := make([]*net.IPNet, 0, len(addrs))
+			for _, addr := range addrs {
+				ipNet := addr.(*net.IPNet)
+				if v4 := ipNet.IP.To4(); v4 != nil {
+					ipNet.IP = v4
+				}
+
+				ipNets = append(ipNets, ipNet)
+			}
+
+			r[iface.Name] = &Interface{
+				Index:        iface.Index,
+				Name:         iface.Name,
+				Addrs:        ipNets,
+				HardwareAddr: iface.HardwareAddr,
+			}
+		}
+
+		return r, nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	ifaces := value.(map[string]*Interface)
+	iface, ok := ifaces[name]
+	if !ok {
+		return nil, ErrIfaceNotFound
+	}
+
+	return iface, nil
+}
+
+func FlushCache() {
+	interfaces.Reset()
+}
+
+func (iface *Interface) PickIPv4Addr(destination net.IP) (*net.IPNet, error) {
+	return iface.pickIPAddr(destination, func(addr *net.IPNet) bool {
+		return addr.IP.To4() != nil
+	})
+}
+
+func (iface *Interface) PickIPv6Addr(destination net.IP) (*net.IPNet, error) {
+	return iface.pickIPAddr(destination, func(addr *net.IPNet) bool {
+		return addr.IP.To4() == nil
+	})
+}
+
+func (iface *Interface) pickIPAddr(destination net.IP, accept func(addr *net.IPNet) bool) (*net.IPNet, error) {
+	var fallback *net.IPNet
+
+	for _, addr := range iface.Addrs {
+		if !accept(addr) {
+			continue
+		}
+
+		if fallback == nil && !addr.IP.IsLinkLocalUnicast() {
+			fallback = addr
+
+			if destination == nil {
+				break
+			}
+		}
+
+		if destination != nil && addr.Contains(destination) {
+			return addr, nil
+		}
+	}
+
+	if fallback == nil {
+		return nil, ErrAddrNotFound
+	}
+
+	return fallback, nil
+}

component/mmdb/mmdb.go

@@ -9,8 +9,10 @@ import (
 	"github.com/oschwald/geoip2-golang"
 )
 
-var mmdb *geoip2.Reader
+var (
-var once sync.Once
+	mmdb *geoip2.Reader
+	once sync.Once
+)
 
 func LoadFromBytes(buffer []byte) {
 	once.Do(func() {

component/process/process_darwin.go

@@ -1,12 +1,13 @@
 package process
 
 import (
-	"bytes"
 	"encoding/binary"
 	"net"
 	"path/filepath"
 	"syscall"
 	"unsafe"
+
+	"golang.org/x/sys/unix"
 )
 
 const (
@@ -94,12 +95,8 @@ func getExecPathFromPID(pid uint32) (string, error) {
 	if errno != 0 {
 		return "", errno
 	}
-	firstZero := bytes.IndexByte(buf, 0)
-	if firstZero <= 0 {
-		return "", nil
-	}
 
-	return filepath.Base(string(buf[:firstZero])), nil
+	return filepath.Base(unix.ByteSliceToString(buf)), nil
 }
 
 func readNativeUint32(b []byte) uint32 {

component/process/process_linux.go

@@ -5,8 +5,8 @@ import (
 	"encoding/binary"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
+	"os"
 	"path"
 	"path/filepath"
 	"syscall"
@@ -16,17 +16,19 @@ import (
 )
 
 // from https://github.com/vishvananda/netlink/blob/bca67dfc8220b44ef582c9da4e9172bf1c9ec973/nl/nl_linux.go#L52-L62
-func init() {
+var nativeEndian = func() binary.ByteOrder {
 	var x uint32 = 0x01020304
 	if *(*byte)(unsafe.Pointer(&x)) == 0x01 {
-		nativeEndian = binary.BigEndian
+		return binary.BigEndian
-	} else {
-		nativeEndian = binary.LittleEndian
 	}
-}
 
-type SocketResolver func(network string, ip net.IP, srcPort int) (inode, uid int, err error)
+	return binary.LittleEndian
-type ProcessNameResolver func(inode, uid int) (name string, err error)
+}()
+
+type (
+	SocketResolver      func(network string, ip net.IP, srcPort int) (inode, uid int, err error)
+	ProcessNameResolver func(inode, uid int) (name string, err error)
+)
 
 // export for android
 var (
@@ -40,8 +42,6 @@ const (
 	pathProc                = "/proc"
 )
 
-var nativeEndian binary.ByteOrder = binary.LittleEndian
-
 func findProcessName(network string, ip net.IP, srcPort int) (string, error) {
 	inode, uid, err := DefaultSocketResolver(network, ip, srcPort)
 	if err != nil {
@@ -169,7 +169,7 @@ func unpackSocketDiagResponse(msg *syscall.NetlinkMessage) (inode, uid uint32) {
 }
 
 func resolveProcessNameByProcSearch(inode, uid int) (string, error) {
-	files, err := ioutil.ReadDir(pathProc)
+	files, err := os.ReadDir(pathProc)
 	if err != nil {
 		return "", err
 	}
@@ -182,14 +182,18 @@ func resolveProcessNameByProcSearch(inode, uid int) (string, error) {
 			continue
 		}
 
-		if f.Sys().(*syscall.Stat_t).Uid != uint32(uid) {
+		info, err := f.Info()
+		if err != nil {
+			return "", err
+		}
+		if info.Sys().(*syscall.Stat_t).Uid != uint32(uid) {
 			continue
 		}
 
 		processPath := path.Join(pathProc, f.Name())
 		fdPath := path.Join(processPath, "fd")
 
-		fds, err := ioutil.ReadDir(fdPath)
+		fds, err := os.ReadDir(fdPath)
 		if err != nil {
 			continue
 		}
@@ -201,7 +205,7 @@ func resolveProcessNameByProcSearch(inode, uid int) (string, error) {
 			}
 
 			if bytes.Equal(buffer[:n], socket) {
-				cmdline, err := ioutil.ReadFile(path.Join(processPath, "cmdline"))
+				cmdline, err := os.ReadFile(path.Join(processPath, "cmdline"))
 				if err != nil {
 					return "", err
 				}

component/process/process_other.go

@@ -1,4 +1,7 @@
-// +build !darwin,!linux,!windows
+//go:build !darwin && !linux && !windows && (!freebsd || !amd64)
+// +build !darwin
+// +build !linux
+// +build !windows
 // +build !freebsd !amd64
 
 package process

component/profile/cachefile/cache.go

@@ -3,52 +3,47 @@ package cachefile
 import (
 	"bytes"
 	"encoding/gob"
-	"io/ioutil"
 	"os"
 	"sync"
+	"time"
 
 	"github.com/Dreamacro/clash/component/profile"
 	C "github.com/Dreamacro/clash/constant"
 	"github.com/Dreamacro/clash/log"
+
+	"go.etcd.io/bbolt"
 )
 
 var (
 	initOnce     sync.Once
-	fileMode     os.FileMode = 0666
+	fileMode     os.FileMode = 0o666
 	defaultCache *CacheFile
-)
 
-type cache struct {
+	bucketSelected = []byte("selected")
-	Selected map[string]string
+	bucketFakeip   = []byte("fakeip")
-}
+)
 
 // CacheFile store and update the cache file
 type CacheFile struct {
-	path  string
+	DB *bbolt.DB
-	model *cache
-	buf   *bytes.Buffer
-	mux   sync.Mutex
 }
 
 func (c *CacheFile) SetSelected(group, selected string) {
 	if !profile.StoreSelected.Load() {
 		return
-	}
+	} else if c.DB == nil {
-
-	c.mux.Lock()
-	defer c.mux.Unlock()
-
-	model := c.element()
-
-	model.Selected[group] = selected
-	c.buf.Reset()
-	if err := gob.NewEncoder(c.buf).Encode(model); err != nil {
-		log.Warnln("[CacheFile] encode gob failed: %s", err.Error())
 		return
 	}
 
-	if err := ioutil.WriteFile(c.path, c.buf.Bytes(), fileMode); err != nil {
+	err := c.DB.Batch(func(t *bbolt.Tx) error {
-		log.Warnln("[CacheFile] write cache to %s failed: %s", c.path, err.Error())
+		bucket, err := t.CreateBucketIfNotExists(bucketSelected)
+		if err != nil {
+			return err
+		}
+		return bucket.Put([]byte(group), []byte(selected))
+	})
+	if err != nil {
+		log.Warnln("[CacheFile] write cache to %s failed: %s", c.DB.Path(), err.Error())
 		return
 	}
 }
@@ -56,46 +51,131 @@ func (c *CacheFile) SetSelected(group, selected string) {
 func (c *CacheFile) SelectedMap() map[string]string {
 	if !profile.StoreSelected.Load() {
 		return nil
+	} else if c.DB == nil {
+		return nil
 	}
 
-	c.mux.Lock()
-	defer c.mux.Unlock()
-
-	model := c.element()
-
 	mapping := map[string]string{}
-	for k, v := range model.Selected {
+	c.DB.View(func(t *bbolt.Tx) error {
-		mapping[k] = v
+		bucket := t.Bucket(bucketSelected)
-	}
+		if bucket == nil {
+			return nil
+		}
+
+		c := bucket.Cursor()
+		for k, v := c.First(); k != nil; k, v = c.Next() {
+			mapping[string(k)] = string(v)
+		}
+		return nil
+	})
 	return mapping
 }
 
-func (c *CacheFile) element() *cache {
+func (c *CacheFile) PutFakeip(key, value []byte) error {
-	if c.model != nil {
+	if c.DB == nil {
-		return c.model
+		return nil
 	}
 
+	err := c.DB.Batch(func(t *bbolt.Tx) error {
+		bucket, err := t.CreateBucketIfNotExists(bucketFakeip)
+		if err != nil {
+			return err
+		}
+		return bucket.Put(key, value)
+	})
+	if err != nil {
+		log.Warnln("[CacheFile] write cache to %s failed: %s", c.DB.Path(), err.Error())
+	}
+
+	return err
+}
+
+func (c *CacheFile) GetFakeip(key []byte) []byte {
+	if c.DB == nil {
+		return nil
+	}
+
+	tx, err := c.DB.Begin(false)
+	if err != nil {
+		return nil
+	}
+	defer tx.Rollback()
+
+	bucket := tx.Bucket(bucketFakeip)
+	if bucket == nil {
+		return nil
+	}
+
+	return bucket.Get(key)
+}
+
+func (c *CacheFile) Close() error {
+	return c.DB.Close()
+}
+
+// TODO: remove migrateCache until 2022
+func migrateCache() {
+	defer func() {
+		options := bbolt.Options{Timeout: time.Second}
+		db, err := bbolt.Open(C.Path.Cache(), fileMode, &options)
+		switch err {
+		case bbolt.ErrInvalid, bbolt.ErrChecksum, bbolt.ErrVersionMismatch:
+			if err = os.Remove(C.Path.Cache()); err != nil {
+				log.Warnln("[CacheFile] remove invalid cache file error: %s", err.Error())
+				break
+			}
+			log.Infoln("[CacheFile] remove invalid cache file and create new one")
+			db, err = bbolt.Open(C.Path.Cache(), fileMode, &options)
+		}
+		if err != nil {
+			log.Warnln("[CacheFile] can't open cache file: %s", err.Error())
+		}
+
+		defaultCache = &CacheFile{
+			DB: db,
+		}
+	}()
+
+	buf, err := os.ReadFile(C.Path.OldCache())
+	if err != nil {
+		return
+	}
+	defer os.Remove(C.Path.OldCache())
+
+	// read old cache file
+	type cache struct {
+		Selected map[string]string
+	}
 	model := &cache{
 		Selected: map[string]string{},
 	}
+	bufReader := bytes.NewBuffer(buf)
+	gob.NewDecoder(bufReader).Decode(model)
 
-	if buf, err := ioutil.ReadFile(c.path); err == nil {
+	// write to new cache file
-		bufReader := bytes.NewBuffer(buf)
+	db, err := bbolt.Open(C.Path.Cache(), fileMode, nil)
-		gob.NewDecoder(bufReader).Decode(model)
+	if err != nil {
+		return
 	}
+	defer db.Close()
 
-	c.model = model
+	db.Batch(func(t *bbolt.Tx) error {
-	return c.model
+		bucket, err := t.CreateBucketIfNotExists(bucketSelected)
+		if err != nil {
+			return err
+		}
+		for group, selected := range model.Selected {
+			if err := bucket.Put([]byte(group), []byte(selected)); err != nil {
+				return err
+			}
+		}
+		return nil
+	})
 }
 
 // Cache return singleton of CacheFile
 func Cache() *CacheFile {
-	initOnce.Do(func() {
+	initOnce.Do(migrateCache)
-		defaultCache = &CacheFile{
-			path: C.Path.Cache(),
-			buf:  &bytes.Buffer{},
-		}
-	})
 
 	return defaultCache
 }

component/profile/profile.go

@@ -4,7 +4,5 @@ import (
 	"go.uber.org/atomic"
 )
 
-var (
+// StoreSelected is a global switch for storing selected proxy to cache
-	// StoreSelected is a global switch for storing selected proxy to cache
+var StoreSelected = atomic.NewBool(true)
-	StoreSelected = atomic.NewBool(true)
-)

component/ssr/tools/bufPool.go

@@ -1,18 +0,0 @@
-package tools
-
-import (
-	"bytes"
-	"math/rand"
-	"sync"
-
-	"github.com/Dreamacro/clash/common/pool"
-)
-
-var BufPool = sync.Pool{New: func() interface{} { return &bytes.Buffer{} }}
-
-func AppendRandBytes(b *bytes.Buffer, length int) {
-	randBytes := pool.Get(length)
-	defer pool.Put(randBytes)
-	rand.Read(randBytes)
-	b.Write(randBytes)
-}

component/trie/domain.go

@@ -12,10 +12,8 @@ const (
 	domainStep      = "."
 )
 
-var (
+// ErrInvalidDomain means insert domain is invalid
-	// ErrInvalidDomain means insert domain is invalid
+var ErrInvalidDomain = errors.New("invalid domain")
-	ErrInvalidDomain = errors.New("invalid domain")
-)
 
 // DomainTrie contains the main logic for adding and searching nodes for domain segments.
 // support wildcard domain (e.g *.google.com)
@@ -23,7 +21,7 @@ type DomainTrie struct {
 	root *Node
 }
 
-func validAndSplitDomain(domain string) ([]string, bool) {
+func ValidAndSplitDomain(domain string) ([]string, bool) {
 	if domain != "" && domain[len(domain)-1] == '.' {
 		return nil, false
 	}
@@ -54,7 +52,7 @@ func validAndSplitDomain(domain string) ([]string, bool) {
 // 4. .example.com
 // 5. +.example.com
 func (t *DomainTrie) Insert(domain string, data interface{}) error {
-	parts, valid := validAndSplitDomain(domain)
+	parts, valid := ValidAndSplitDomain(domain)
 	if !valid {
 		return ErrInvalidDomain
 	}
@@ -91,7 +89,7 @@ func (t *DomainTrie) insert(parts []string, data interface{}) {
 // 2. wildcard domain
 // 2. dot wildcard domain
 func (t *DomainTrie) Search(domain string) *Node {
-	parts, valid := validAndSplitDomain(domain)
+	parts, valid := ValidAndSplitDomain(domain)
 	if !valid || parts[0] == "" {
 		return nil
 	}

component/vmess/websocket.go

@@ -1,169 +0,0 @@
-package vmess
-
-import (
-	"crypto/tls"
-	"fmt"
-	"io"
-	"net"
-	"net/http"
-	"net/url"
-	"strings"
-	"sync"
-	"time"
-
-	"github.com/gorilla/websocket"
-)
-
-type websocketConn struct {
-	conn       *websocket.Conn
-	reader     io.Reader
-	remoteAddr net.Addr
-
-	// https://godoc.org/github.com/gorilla/websocket#hdr-Concurrency
-	rMux sync.Mutex
-	wMux sync.Mutex
-}
-
-type WebsocketConfig struct {
-	Host           string
-	Port           string
-	Path           string
-	Headers        http.Header
-	TLS            bool
-	SkipCertVerify bool
-	ServerName     string
-	SessionCache   tls.ClientSessionCache
-}
-
-// Read implements net.Conn.Read()
-func (wsc *websocketConn) Read(b []byte) (int, error) {
-	wsc.rMux.Lock()
-	defer wsc.rMux.Unlock()
-	for {
-		reader, err := wsc.getReader()
-		if err != nil {
-			return 0, err
-		}
-
-		nBytes, err := reader.Read(b)
-		if err == io.EOF {
-			wsc.reader = nil
-			continue
-		}
-		return nBytes, err
-	}
-}
-
-// Write implements io.Writer.
-func (wsc *websocketConn) Write(b []byte) (int, error) {
-	wsc.wMux.Lock()
-	defer wsc.wMux.Unlock()
-	if err := wsc.conn.WriteMessage(websocket.BinaryMessage, b); err != nil {
-		return 0, err
-	}
-	return len(b), nil
-}
-
-func (wsc *websocketConn) Close() error {
-	var errors []string
-	if err := wsc.conn.WriteControl(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""), time.Now().Add(time.Second*5)); err != nil {
-		errors = append(errors, err.Error())
-	}
-	if err := wsc.conn.Close(); err != nil {
-		errors = append(errors, err.Error())
-	}
-	if len(errors) > 0 {
-		return fmt.Errorf("failed to close connection: %s", strings.Join(errors, ","))
-	}
-	return nil
-}
-
-func (wsc *websocketConn) getReader() (io.Reader, error) {
-	if wsc.reader != nil {
-		return wsc.reader, nil
-	}
-
-	_, reader, err := wsc.conn.NextReader()
-	if err != nil {
-		return nil, err
-	}
-	wsc.reader = reader
-	return reader, nil
-}
-
-func (wsc *websocketConn) LocalAddr() net.Addr {
-	return wsc.conn.LocalAddr()
-}
-
-func (wsc *websocketConn) RemoteAddr() net.Addr {
-	return wsc.remoteAddr
-}
-
-func (wsc *websocketConn) SetDeadline(t time.Time) error {
-	if err := wsc.SetReadDeadline(t); err != nil {
-		return err
-	}
-	return wsc.SetWriteDeadline(t)
-}
-
-func (wsc *websocketConn) SetReadDeadline(t time.Time) error {
-	return wsc.conn.SetReadDeadline(t)
-}
-
-func (wsc *websocketConn) SetWriteDeadline(t time.Time) error {
-	return wsc.conn.SetWriteDeadline(t)
-}
-
-func StreamWebsocketConn(conn net.Conn, c *WebsocketConfig) (net.Conn, error) {
-	dialer := &websocket.Dialer{
-		NetDial: func(network, addr string) (net.Conn, error) {
-			return conn, nil
-		},
-		ReadBufferSize:   4 * 1024,
-		WriteBufferSize:  4 * 1024,
-		HandshakeTimeout: time.Second * 8,
-	}
-
-	scheme := "ws"
-	if c.TLS {
-		scheme = "wss"
-		dialer.TLSClientConfig = &tls.Config{
-			ServerName:         c.Host,
-			InsecureSkipVerify: c.SkipCertVerify,
-			ClientSessionCache: c.SessionCache,
-		}
-
-		if c.ServerName != "" {
-			dialer.TLSClientConfig.ServerName = c.ServerName
-		} else if host := c.Headers.Get("Host"); host != "" {
-			dialer.TLSClientConfig.ServerName = host
-		}
-	}
-
-	uri := url.URL{
-		Scheme: scheme,
-		Host:   net.JoinHostPort(c.Host, c.Port),
-		Path:   c.Path,
-	}
-
-	headers := http.Header{}
-	if c.Headers != nil {
-		for k := range c.Headers {
-			headers.Add(k, c.Headers.Get(k))
-		}
-	}
-
-	wsConn, resp, err := dialer.Dial(uri.String(), headers)
-	if err != nil {
-		reason := err.Error()
-		if resp != nil {
-			reason = resp.Status
-		}
-		return nil, fmt.Errorf("dial %s error: %s", uri.Host, reason)
-	}
-
-	return &websocketConn{
-		conn:       wsConn,
-		remoteAddr: conn.RemoteAddr(),
-	}, nil
-}

config/config.go

@@ -8,19 +8,21 @@ import (
 	"os"
 	"strings"
 
-	"github.com/Dreamacro/clash/adapters/outbound"
+	"github.com/Dreamacro/clash/adapter"
-	"github.com/Dreamacro/clash/adapters/outboundgroup"
+	"github.com/Dreamacro/clash/adapter/outbound"
-	"github.com/Dreamacro/clash/adapters/provider"
+	"github.com/Dreamacro/clash/adapter/outboundgroup"
+	"github.com/Dreamacro/clash/adapter/provider"
 	"github.com/Dreamacro/clash/component/auth"
 	"github.com/Dreamacro/clash/component/fakeip"
 	"github.com/Dreamacro/clash/component/trie"
 	C "github.com/Dreamacro/clash/constant"
+	providerTypes "github.com/Dreamacro/clash/constant/provider"
 	"github.com/Dreamacro/clash/dns"
 	"github.com/Dreamacro/clash/log"
-	R "github.com/Dreamacro/clash/rules"
+	R "github.com/Dreamacro/clash/rule"
 	T "github.com/Dreamacro/clash/tunnel"
 
-	yaml "gopkg.in/yaml.v2"
+	"gopkg.in/yaml.v2"
 )
 
 // General config
@@ -60,22 +62,25 @@ type DNS struct {
 	Fallback          []dns.NameServer `yaml:"fallback"`
 	FallbackFilter    FallbackFilter   `yaml:"fallback-filter"`
 	Listen            string           `yaml:"listen"`
-	EnhancedMode      dns.EnhancedMode `yaml:"enhanced-mode"`
+	EnhancedMode      C.DNSMode        `yaml:"enhanced-mode"`
 	DefaultNameserver []dns.NameServer `yaml:"default-nameserver"`
 	FakeIPRange       *fakeip.Pool
 	Hosts             *trie.DomainTrie
+	NameServerPolicy  map[string]dns.NameServer
 }
 
 // FallbackFilter config
 type FallbackFilter struct {
-	GeoIP  bool         `yaml:"geoip"`
+	GeoIP     bool         `yaml:"geoip"`
-	IPCIDR []*net.IPNet `yaml:"ipcidr"`
+	GeoIPCode string       `yaml:"geoip-code"`
-	Domain []string     `yaml:"domain"`
+	IPCIDR    []*net.IPNet `yaml:"ipcidr"`
+	Domain    []string     `yaml:"domain"`
 }
 
 // Profile config
 type Profile struct {
 	StoreSelected bool `yaml:"store-selected"`
+	StoreFakeIP   bool `yaml:"store-fake-ip"`
 }
 
 // Experimental config
@@ -91,7 +96,7 @@ type Config struct {
 	Rules        []C.Rule
 	Users        []auth.AuthUser
 	Proxies      map[string]C.Proxy
-	Providers    map[string]provider.ProxyProvider
+	Providers    map[string]providerTypes.ProxyProvider
 }
 
 type RawDNS struct {
@@ -102,16 +107,18 @@ type RawDNS struct {
 	Fallback          []string          `yaml:"fallback"`
 	FallbackFilter    RawFallbackFilter `yaml:"fallback-filter"`
 	Listen            string            `yaml:"listen"`
-	EnhancedMode      dns.EnhancedMode  `yaml:"enhanced-mode"`
+	EnhancedMode      C.DNSMode         `yaml:"enhanced-mode"`
 	FakeIPRange       string            `yaml:"fake-ip-range"`
 	FakeIPFilter      []string          `yaml:"fake-ip-filter"`
 	DefaultNameserver []string          `yaml:"default-nameserver"`
+	NameServerPolicy  map[string]string `yaml:"nameserver-policy"`
 }
 
 type RawFallbackFilter struct {
-	GeoIP  bool     `yaml:"geoip"`
+	GeoIP     bool     `yaml:"geoip"`
-	IPCIDR []string `yaml:"ipcidr"`
+	GeoIPCode string   `yaml:"geoip-code"`
-	Domain []string `yaml:"domain"`
+	IPCIDR    []string `yaml:"ipcidr"`
+	Domain    []string `yaml:"domain"`
 }
 
 type RawConfig struct {
@@ -168,8 +175,9 @@ func UnmarshalRawConfig(buf []byte) (*RawConfig, error) {
 			UseHosts:    true,
 			FakeIPRange: "198.18.0.1/16",
 			FallbackFilter: RawFallbackFilter{
-				GeoIP:  true,
+				GeoIP:     true,
-				IPCIDR: []string{},
+				GeoIPCode: "CN",
+				IPCIDR:    []string{},
 			},
 			DefaultNameserver: []string{
 				"114.114.114.114",
@@ -181,7 +189,7 @@ func UnmarshalRawConfig(buf []byte) (*RawConfig, error) {
 		},
 	}
 
-	if err := yaml.Unmarshal(buf, &rawCfg); err != nil {
+	if err := yaml.Unmarshal(buf, rawCfg); err != nil {
 		return nil, err
 	}
 
@@ -219,7 +227,7 @@ func ParseRawConfig(rawCfg *RawConfig) (*Config, error) {
 	}
 	config.Hosts = hosts
 
-	dnsCfg, err := parseDNS(rawCfg.DNS, hosts)
+	dnsCfg, err := parseDNS(rawCfg, hosts)
 	if err != nil {
 		return nil, err
 	}
@@ -264,21 +272,21 @@ func parseGeneral(cfg *RawConfig) (*General, error) {
 	}, nil
 }
 
-func parseProxies(cfg *RawConfig) (proxies map[string]C.Proxy, providersMap map[string]provider.ProxyProvider, err error) {
+func parseProxies(cfg *RawConfig) (proxies map[string]C.Proxy, providersMap map[string]providerTypes.ProxyProvider, err error) {
 	proxies = make(map[string]C.Proxy)
-	providersMap = make(map[string]provider.ProxyProvider)
+	providersMap = make(map[string]providerTypes.ProxyProvider)
 	proxyList := []string{}
 	proxiesConfig := cfg.Proxy
 	groupsConfig := cfg.ProxyGroup
 	providersConfig := cfg.ProxyProvider
 
-	proxies["DIRECT"] = outbound.NewProxy(outbound.NewDirect())
+	proxies["DIRECT"] = adapter.NewProxy(outbound.NewDirect())
-	proxies["REJECT"] = outbound.NewProxy(outbound.NewReject())
+	proxies["REJECT"] = adapter.NewProxy(outbound.NewReject())
 	proxyList = append(proxyList, "DIRECT", "REJECT")
 
 	// parse proxy
 	for idx, mapping := range proxiesConfig {
-		proxy, err := outbound.ParseProxy(mapping)
+		proxy, err := adapter.ParseProxy(mapping)
 		if err != nil {
 			return nil, nil, fmt.Errorf("proxy %d: %w", idx, err)
 		}
@@ -337,12 +345,12 @@ func parseProxies(cfg *RawConfig) (proxies map[string]C.Proxy, providersMap map[
 			return nil, nil, fmt.Errorf("proxy group %s: the duplicate name", groupName)
 		}
 
-		proxies[groupName] = outbound.NewProxy(group)
+		proxies[groupName] = adapter.NewProxy(group)
 	}
 
 	// initial compatible provider
 	for _, pd := range providersMap {
-		if pd.VehicleType() != provider.Compatible {
+		if pd.VehicleType() != providerTypes.Compatible {
 			continue
 		}
 
@@ -364,9 +372,9 @@ func parseProxies(cfg *RawConfig) (proxies map[string]C.Proxy, providersMap map[
 		&outboundgroup.GroupCommonOption{
 			Name: "GLOBAL",
 		},
-		[]provider.ProxyProvider{pd},
+		[]providerTypes.ProxyProvider{pd},
 	)
-	proxies["GLOBAL"] = outbound.NewProxy(global)
+	proxies["GLOBAL"] = adapter.NewProxy(global)
 	return proxies, providersMap, nil
 }
 
@@ -481,6 +489,9 @@ func parseNameServer(servers []string) ([]dns.NameServer, error) {
 			clearURL := url.URL{Scheme: "https", Host: u.Host, Path: u.Path}
 			addr = clearURL.String()
 			dnsNetType = "https" // DNS over HTTPS
+		case "dhcp":
+			addr = u.Host
+			dnsNetType = "dhcp" // UDP from DHCP
 		default:
 			return nil, fmt.Errorf("DNS NameServer[%d] unsupport scheme: %s", idx, u.Scheme)
 		}
@@ -500,6 +511,23 @@ func parseNameServer(servers []string) ([]dns.NameServer, error) {
 	return nameservers, nil
 }
 
+func parseNameServerPolicy(nsPolicy map[string]string) (map[string]dns.NameServer, error) {
+	policy := map[string]dns.NameServer{}
+
+	for domain, server := range nsPolicy {
+		nameservers, err := parseNameServer([]string{server})
+		if err != nil {
+			return nil, err
+		}
+		if _, valid := trie.ValidAndSplitDomain(domain); !valid {
+			return nil, fmt.Errorf("DNS ResoverRule invalid domain: %s", domain)
+		}
+		policy[domain] = nameservers[0]
+	}
+
+	return policy, nil
+}
+
 func parseFallbackIPCIDR(ips []string) ([]*net.IPNet, error) {
 	ipNets := []*net.IPNet{}
 
@@ -514,7 +542,8 @@ func parseFallbackIPCIDR(ips []string) ([]*net.IPNet, error) {
 	return ipNets, nil
 }
 
-func parseDNS(cfg RawDNS, hosts *trie.DomainTrie) (*DNS, error) {
+func parseDNS(rawCfg *RawConfig, hosts *trie.DomainTrie) (*DNS, error) {
+	cfg := rawCfg.DNS
 	if cfg.Enable && len(cfg.NameServer) == 0 {
 		return nil, fmt.Errorf("if DNS configuration is turned on, NameServer cannot be empty")
 	}
@@ -537,6 +566,10 @@ func parseDNS(cfg RawDNS, hosts *trie.DomainTrie) (*DNS, error) {
 		return nil, err
 	}
 
+	if dnsCfg.NameServerPolicy, err = parseNameServerPolicy(cfg.NameServerPolicy); err != nil {
+		return nil, err
+	}
+
 	if len(cfg.DefaultNameserver) == 0 {
 		return nil, errors.New("default nameserver should have at least one nameserver")
 	}
@@ -551,7 +584,7 @@ func parseDNS(cfg RawDNS, hosts *trie.DomainTrie) (*DNS, error) {
 		}
 	}
 
-	if cfg.EnhancedMode == dns.FAKEIP {
+	if cfg.EnhancedMode == C.DNSFakeIP {
 		_, ipnet, err := net.ParseCIDR(cfg.FakeIPRange)
 		if err != nil {
 			return nil, err
@@ -566,7 +599,12 @@ func parseDNS(cfg RawDNS, hosts *trie.DomainTrie) (*DNS, error) {
 			}
 		}
 
-		pool, err := fakeip.New(ipnet, 1000, host)
+		pool, err := fakeip.New(fakeip.Options{
+			IPNet:       ipnet,
+			Size:        1000,
+			Host:        host,
+			Persistence: rawCfg.Profile.StoreFakeIP,
+		})
 		if err != nil {
 			return nil, err
 		}
@@ -575,6 +613,7 @@ func parseDNS(cfg RawDNS, hosts *trie.DomainTrie) (*DNS, error) {
 	}
 
 	dnsCfg.FallbackFilter.GeoIP = cfg.FallbackFilter.GeoIP
+	dnsCfg.FallbackFilter.GeoIPCode = cfg.FallbackFilter.GeoIPCode
 	if fallbackip, err := parseFallbackIPCIDR(cfg.FallbackFilter.IPCIDR); err == nil {
 		dnsCfg.FallbackFilter.IPCIDR = fallbackip
 	}

config/initial.go

@@ -18,7 +18,7 @@ func downloadMMDB(path string) (err error) {
 	}
 	defer resp.Body.Close()
 
-	f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0644)
+	f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0o644)
 	if err != nil {
 		return err
 	}
@@ -54,7 +54,7 @@ func initMMDB() error {
 func Init(dir string) error {
 	// initial homedir
 	if _, err := os.Stat(dir); os.IsNotExist(err) {
-		if err := os.MkdirAll(dir, 0777); err != nil {
+		if err := os.MkdirAll(dir, 0o777); err != nil {
 			return fmt.Errorf("can't create config directory %s: %s", dir, err.Error())
 		}
 	}
@@ -62,7 +62,7 @@ func Init(dir string) error {
 	// initial config.yaml
 	if _, err := os.Stat(C.Path.Config()); os.IsNotExist(err) {
 		log.Infoln("Can't find config, create a initial config file")
-		f, err := os.OpenFile(C.Path.Config(), os.O_CREATE|os.O_WRONLY, 0644)
+		f, err := os.OpenFile(C.Path.Config(), os.O_CREATE|os.O_WRONLY, 0o644)
 		if err != nil {
 			return fmt.Errorf("can't create file %s: %s", C.Path.Config(), err.Error())
 		}

config/utils.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/Dreamacro/clash/adapters/outboundgroup"
+	"github.com/Dreamacro/clash/adapter/outboundgroup"
 	"github.com/Dreamacro/clash/common/structure"
 )
 

constant/adapters.go

@@ -5,6 +5,8 @@ import (
 	"fmt"
 	"net"
 	"time"
+
+	"github.com/Dreamacro/clash/component/dialer"
 )
 
 // Adapter Type
@@ -27,6 +29,11 @@ const (
 	LoadBalance
 )
 
+const (
+	DefaultTCPTimeout = 5 * time.Second
+	DefaultUDPTimeout = DefaultTCPTimeout
+)
+
 type Connection interface {
 	Chains() Chain
 	AppendToChains(adapter ProxyAdapter)
@@ -69,11 +76,14 @@ type PacketConn interface {
 type ProxyAdapter interface {
 	Name() string
 	Type() AdapterType
+	Addr() string
+	SupportUDP() bool
+	MarshalJSON() ([]byte, error)
 
 	// StreamConn wraps a protocol around net.Conn with Metadata.
 	//
 	// Examples:
-	//	conn, _ := net.Dial("tcp", "host:port")
+	//	conn, _ := net.DialContext(context.Background(), "tcp", "host:port")
 	//	conn, _ = adapter.StreamConn(conn, metadata)
 	//
 	// It returns a C.Conn with protocol which start with
@@ -82,12 +92,10 @@ type ProxyAdapter interface {
 
 	// DialContext return a C.Conn with protocol which
 	// contains multiplexing-related reuse logic (if any)
-	DialContext(ctx context.Context, metadata *Metadata) (Conn, error)
+	DialContext(ctx context.Context, metadata *Metadata, opts ...dialer.Option) (Conn, error)
+
+	ListenPacketContext(ctx context.Context, metadata *Metadata, opts ...dialer.Option) (PacketConn, error)
 
-	DialUDP(metadata *Metadata) (PacketConn, error)
-	SupportUDP() bool
-	MarshalJSON() ([]byte, error)
-	Addr() string
 	// Unwrap extracts the proxy from a proxy-group. It returns nil when nothing to extract.
 	Unwrap(metadata *Metadata) Proxy
 }
@@ -101,9 +109,14 @@ type Proxy interface {
 	ProxyAdapter
 	Alive() bool
 	DelayHistory() []DelayHistory
-	Dial(metadata *Metadata) (Conn, error)
 	LastDelay() uint16
 	URLTest(ctx context.Context, url string) (uint16, error)
+
+	// Deprecated: use DialContext instead.
+	Dial(metadata *Metadata) (Conn, error)
+
+	// Deprecated: use DialPacketConn instead.
+	DialUDP(metadata *Metadata) (PacketConn, error)
 }
 
 // AdapterType is enum of adapter type

constant/dns.go

@@ -0,0 +1,70 @@
+package constant
+
+import (
+	"encoding/json"
+	"errors"
+)
+
+// DNSModeMapping is a mapping for EnhancedMode enum
+var DNSModeMapping = map[string]DNSMode{
+	DNSNormal.String():  DNSNormal,
+	DNSFakeIP.String():  DNSFakeIP,
+	DNSMapping.String(): DNSMapping,
+}
+
+const (
+	DNSNormal DNSMode = iota
+	DNSFakeIP
+	DNSMapping
+)
+
+type DNSMode int
+
+// UnmarshalYAML unserialize EnhancedMode with yaml
+func (e *DNSMode) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var tp string
+	if err := unmarshal(&tp); err != nil {
+		return err
+	}
+	mode, exist := DNSModeMapping[tp]
+	if !exist {
+		return errors.New("invalid mode")
+	}
+	*e = mode
+	return nil
+}
+
+// MarshalYAML serialize EnhancedMode with yaml
+func (e DNSMode) MarshalYAML() (interface{}, error) {
+	return e.String(), nil
+}
+
+// UnmarshalJSON unserialize EnhancedMode with json
+func (e *DNSMode) UnmarshalJSON(data []byte) error {
+	var tp string
+	json.Unmarshal(data, &tp)
+	mode, exist := DNSModeMapping[tp]
+	if !exist {
+		return errors.New("invalid mode")
+	}
+	*e = mode
+	return nil
+}
+
+// MarshalJSON serialize EnhancedMode with json
+func (e DNSMode) MarshalJSON() ([]byte, error) {
+	return json.Marshal(e.String())
+}
+
+func (e DNSMode) String() string {
+	switch e {
+	case DNSNormal:
+		return "normal"
+	case DNSFakeIP:
+		return "fake-ip"
+	case DNSMapping:
+		return "redir-host"
+	default:
+		return "unknown"
+	}
+}

constant/listener.go

@@ -0,0 +1,7 @@
+package constant
+
+type Listener interface {
+	RawAddress() string
+	Address() string
+	Close() error
+}

constant/metadata.go

@@ -17,7 +17,8 @@ const (
 
 	HTTP Type = iota
 	HTTPCONNECT
-	SOCKS
+	SOCKS4
+	SOCKS5
 	REDIR
 	TPROXY
 )
@@ -43,7 +44,9 @@ func (t Type) String() string {
 		return "HTTP"
 	case HTTPCONNECT:
 		return "HTTP Connect"
-	case SOCKS:
+	case SOCKS4:
+		return "Socks4"
+	case SOCKS5:
 		return "Socks5"
 	case REDIR:
 		return "Redir"
@@ -68,6 +71,7 @@ type Metadata struct {
 	DstPort  string  `json:"destinationPort"`
 	AddrType int     `json:"-"`
 	Host     string  `json:"host"`
+	DNSMode  DNSMode `json:"dnsMode"`
 }
 
 func (m *Metadata) RemoteAddress() string {
@@ -82,14 +86,31 @@ func (m *Metadata) Resolved() bool {
 	return m.DstIP != nil
 }
 
+// Pure is used to solve unexpected behavior
+// when dialing proxy connection in DNSMapping mode.
+func (m *Metadata) Pure() *Metadata {
+	if m.DNSMode == DNSMapping && m.DstIP != nil {
+		copy := *m
+		copy.Host = ""
+		if copy.DstIP.To4() != nil {
+			copy.AddrType = AtypIPv4
+		} else {
+			copy.AddrType = AtypIPv6
+		}
+		return &copy
+	}
+
+	return m
+}
+
 func (m *Metadata) UDPAddr() *net.UDPAddr {
 	if m.NetWork != UDP || m.DstIP == nil {
 		return nil
 	}
-	port, _ := strconv.Atoi(m.DstPort)
+	port, _ := strconv.ParseInt(m.DstPort, 10, 16)
 	return &net.UDPAddr{
 		IP:   m.DstIP,
-		Port: port,
+		Port: int(port),
 	}
 }
 

constant/path.go

@@ -9,21 +9,19 @@ import (
 const Name = "clash"
 
 // Path is used to get the configuration path
-var Path *path
+var Path = func() *path {
-
-type path struct {
-	homeDir    string
-	configFile string
-}
-
-func init() {
 	homeDir, err := os.UserHomeDir()
 	if err != nil {
 		homeDir, _ = os.Getwd()
 	}
 
 	homeDir = P.Join(homeDir, ".config", Name)
-	Path = &path{homeDir: homeDir, configFile: "config.yaml"}
+	return &path{homeDir: homeDir, configFile: "config.yaml"}
+}()
+
+type path struct {
+	homeDir    string
+	configFile string
 }
 
 // SetHomeDir is used to set the configuration path
@@ -57,6 +55,10 @@ func (p *path) MMDB() string {
 	return P.Join(p.homeDir, "Country.mmdb")
 }
 
-func (p *path) Cache() string {
+func (p *path) OldCache() string {
 	return P.Join(p.homeDir, ".cache")
 }
+
+func (p *path) Cache() string {
+	return P.Join(p.homeDir, "cache.db")
+}

constant/provider/interface.go

@@ -0,0 +1,105 @@
+package provider
+
+import (
+	"github.com/Dreamacro/clash/constant"
+)
+
+// Vehicle Type
+const (
+	File VehicleType = iota
+	HTTP
+	Compatible
+)
+
+// VehicleType defined
+type VehicleType int
+
+func (v VehicleType) String() string {
+	switch v {
+	case File:
+		return "File"
+	case HTTP:
+		return "HTTP"
+	case Compatible:
+		return "Compatible"
+	default:
+		return "Unknown"
+	}
+}
+
+type Vehicle interface {
+	Read() ([]byte, error)
+	Path() string
+	Type() VehicleType
+}
+
+// Provider Type
+const (
+	Proxy ProviderType = iota
+	Rule
+)
+
+// ProviderType defined
+type ProviderType int
+
+func (pt ProviderType) String() string {
+	switch pt {
+	case Proxy:
+		return "Proxy"
+	case Rule:
+		return "Rule"
+	default:
+		return "Unknown"
+	}
+}
+
+// Provider interface
+type Provider interface {
+	Name() string
+	VehicleType() VehicleType
+	Type() ProviderType
+	Initial() error
+	Update() error
+}
+
+// ProxyProvider interface
+type ProxyProvider interface {
+	Provider
+	Proxies() []constant.Proxy
+	// ProxiesWithTouch is used to inform the provider that the proxy is actually being used while getting the list of proxies.
+	// Commonly used in DialContext and DialPacketConn
+	ProxiesWithTouch() []constant.Proxy
+	HealthCheck()
+}
+
+// Rule Type
+const (
+	Domain RuleType = iota
+	IPCIDR
+	Classical
+)
+
+// RuleType defined
+type RuleType int
+
+func (rt RuleType) String() string {
+	switch rt {
+	case Domain:
+		return "Domain"
+	case IPCIDR:
+		return "IPCIDR"
+	case Classical:
+		return "Classical"
+	default:
+		return "Unknown"
+	}
+}
+
+// RuleProvider interface
+type RuleProvider interface {
+	Provider
+	Behavior() RuleType
+	Match(*constant.Metadata) bool
+	ShouldResolveIP() bool
+	AsRule(adaptor string) constant.Rule
+}

context/http.go

@@ -1,47 +0,0 @@
-package context
-
-import (
-	"net"
-	"net/http"
-
-	C "github.com/Dreamacro/clash/constant"
-
-	"github.com/gofrs/uuid"
-)
-
-type HTTPContext struct {
-	id       uuid.UUID
-	metadata *C.Metadata
-	conn     net.Conn
-	req      *http.Request
-}
-
-func NewHTTPContext(conn net.Conn, req *http.Request, metadata *C.Metadata) *HTTPContext {
-	id, _ := uuid.NewV4()
-	return &HTTPContext{
-		id:       id,
-		metadata: metadata,
-		conn:     conn,
-		req:      req,
-	}
-}
-
-// ID implement C.ConnContext ID
-func (hc *HTTPContext) ID() uuid.UUID {
-	return hc.id
-}
-
-// Metadata implement C.ConnContext Metadata
-func (hc *HTTPContext) Metadata() *C.Metadata {
-	return hc.metadata
-}
-
-// Conn implement C.ConnContext Conn
-func (hc *HTTPContext) Conn() net.Conn {
-	return hc.conn
-}
-
-// Request return the http request struct
-func (hc *HTTPContext) Request() *http.Request {
-	return hc.req
-}

dns/client.go

@@ -2,6 +2,7 @@ package dns
 
 import (
 	"context"
+	"crypto/tls"
 	"fmt"
 	"net"
 	"strings"
@@ -14,42 +15,46 @@ import (
 
 type client struct {
 	*D.Client
-	r    *Resolver
+	r     *Resolver
-	port string
+	port  string
-	host string
+	host  string
+	iface string
 }
 
-func (c *client) Exchange(m *D.Msg) (msg *D.Msg, err error) {
+func (c *client) Exchange(m *D.Msg) (*D.Msg, error) {
 	return c.ExchangeContext(context.Background(), m)
 }
 
-func (c *client) ExchangeContext(ctx context.Context, m *D.Msg) (msg *D.Msg, err error) {
+func (c *client) ExchangeContext(ctx context.Context, m *D.Msg) (*D.Msg, error) {
-	var ip net.IP
+	var (
+		ip  net.IP
+		err error
+	)
 	if c.r == nil {
 		// a default ip dns
-		ip = net.ParseIP(c.host)
+		if ip = net.ParseIP(c.host); ip == nil {
+			return nil, fmt.Errorf("dns %s not a valid ip", c.host)
+		}
 	} else {
 		if ip, err = resolver.ResolveIPWithResolver(c.host, c.r); err != nil {
 			return nil, fmt.Errorf("use default dns resolve failed: %w", err)
 		}
 	}
 
-	d, err := dialer.Dialer()
+	network := "udp"
+	if strings.HasPrefix(c.Client.Net, "tcp") {
+		network = "tcp"
+	}
+
+	options := []dialer.Option{}
+	if c.iface != "" {
+		options = append(options, dialer.WithInterface(c.iface))
+	}
+	conn, err := dialer.DialContext(ctx, network, net.JoinHostPort(ip.String(), c.port), options...)
 	if err != nil {
 		return nil, err
 	}
-
+	defer conn.Close()
-	if ip != nil && ip.IsGlobalUnicast() && dialer.DialHook != nil {
-		network := "udp"
-		if strings.HasPrefix(c.Client.Net, "tcp") {
-			network = "tcp"
-		}
-		if err := dialer.DialHook(d, network, ip); err != nil {
-			return nil, err
-		}
-	}
-
-	c.Client.Dialer = d
 
 	// miekg/dns ExchangeContext doesn't respond to context cancel.
 	// this is a workaround
@@ -59,7 +64,17 @@ func (c *client) ExchangeContext(ctx context.Context, m *D.Msg) (msg *D.Msg, err
 	}
 	ch := make(chan result, 1)
 	go func() {
-		msg, _, err := c.Client.Exchange(m, net.JoinHostPort(ip.String(), c.port))
+		if strings.HasSuffix(c.Client.Net, "tls") {
+			conn = tls.Client(conn, c.Client.TLSConfig)
+		}
+
+		msg, _, err := c.Client.ExchangeWithConn(m, &D.Conn{
+			Conn:         conn,
+			UDPSize:      c.Client.UDPSize,
+			TsigSecret:   c.Client.TsigSecret,
+			TsigProvider: c.Client.TsigProvider,
+		})
+
 		ch <- result{msg, err}
 	}()
 

dns/dhcp.go

@@ -0,0 +1,147 @@
+package dns
+
+import (
+	"bytes"
+	"context"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/Dreamacro/clash/component/dhcp"
+	"github.com/Dreamacro/clash/component/iface"
+	"github.com/Dreamacro/clash/component/resolver"
+
+	D "github.com/miekg/dns"
+)
+
+const (
+	IfaceTTL    = time.Second * 20
+	DHCPTTL     = time.Hour
+	DHCPTimeout = time.Minute
+)
+
+type dhcpClient struct {
+	ifaceName string
+
+	lock            sync.Mutex
+	ifaceInvalidate time.Time
+	dnsInvalidate   time.Time
+
+	ifaceAddr *net.IPNet
+	done      chan struct{}
+	resolver  *Resolver
+	err       error
+}
+
+func (d *dhcpClient) Exchange(m *D.Msg) (msg *D.Msg, err error) {
+	ctx, cancel := context.WithTimeout(context.Background(), resolver.DefaultDNSTimeout)
+	defer cancel()
+
+	return d.ExchangeContext(ctx, m)
+}
+
+func (d *dhcpClient) ExchangeContext(ctx context.Context, m *D.Msg) (msg *D.Msg, err error) {
+	res, err := d.resolve(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	return res.ExchangeContext(ctx, m)
+}
+
+func (d *dhcpClient) resolve(ctx context.Context) (*Resolver, error) {
+	d.lock.Lock()
+
+	invalidated, err := d.invalidate()
+	if err != nil {
+		d.err = err
+	} else if invalidated {
+		done := make(chan struct{})
+
+		d.done = done
+
+		go func() {
+			ctx, cancel := context.WithTimeout(context.Background(), DHCPTimeout)
+			defer cancel()
+
+			var res *Resolver
+			dns, err := dhcp.ResolveDNSFromDHCP(ctx, d.ifaceName)
+			if err == nil {
+				nameserver := make([]NameServer, 0, len(dns))
+				for _, item := range dns {
+					nameserver = append(nameserver, NameServer{
+						Addr:      net.JoinHostPort(item.String(), "53"),
+						Interface: d.ifaceName,
+					})
+				}
+
+				res = NewResolver(Config{
+					Main: nameserver,
+				})
+			}
+
+			d.lock.Lock()
+			defer d.lock.Unlock()
+
+			close(done)
+
+			d.done = nil
+			d.resolver = res
+			d.err = err
+		}()
+	}
+
+	d.lock.Unlock()
+
+	for {
+		d.lock.Lock()
+
+		res, err, done := d.resolver, d.err, d.done
+
+		d.lock.Unlock()
+
+		// initializing
+		if res == nil && err == nil {
+			select {
+			case <-done:
+				continue
+			case <-ctx.Done():
+				return nil, ctx.Err()
+			}
+		}
+
+		// dirty return
+		return res, err
+	}
+}
+
+func (d *dhcpClient) invalidate() (bool, error) {
+	if time.Now().Before(d.ifaceInvalidate) {
+		return false, nil
+	}
+
+	d.ifaceInvalidate = time.Now().Add(IfaceTTL)
+
+	ifaceObj, err := iface.ResolveInterface(d.ifaceName)
+	if err != nil {
+		return false, err
+	}
+
+	addr, err := ifaceObj.PickIPv4Addr(nil)
+	if err != nil {
+		return false, err
+	}
+
+	if time.Now().Before(d.dnsInvalidate) && d.ifaceAddr.IP.Equal(addr.IP) && bytes.Equal(d.ifaceAddr.Mask, addr.Mask) {
+		return false, nil
+	}
+
+	d.dnsInvalidate = time.Now().Add(DHCPTTL)
+	d.ifaceAddr = addr
+
+	return d.done == nil, nil
+}
+
+func newDHCPClient(ifaceName string) *dhcpClient {
+	return &dhcpClient{ifaceName: ifaceName}
+}

dns/doh.go

@@ -3,8 +3,7 @@ package dns
 import (
 	"bytes"
 	"context"
-	"crypto/tls"
+	"io"
-	"io/ioutil"
 	"net"
 	"net/http"
 
@@ -29,13 +28,21 @@ func (dc *dohClient) Exchange(m *D.Msg) (msg *D.Msg, err error) {
 }
 
 func (dc *dohClient) ExchangeContext(ctx context.Context, m *D.Msg) (msg *D.Msg, err error) {
-	req, err := dc.newRequest(m)
+	// https://datatracker.ietf.org/doc/html/rfc8484#section-4.1
+	// In order to maximize cache friendliness, SHOULD use a DNS ID of 0 in every DNS request.
+	newM := *m
+	newM.Id = 0
+	req, err := dc.newRequest(&newM)
 	if err != nil {
 		return nil, err
 	}
 
 	req = req.WithContext(ctx)
-	return dc.doRequest(req)
+	msg, err = dc.doRequest(req)
+	if err == nil {
+		msg.Id = m.Id
+	}
+	return
 }
 
 // newRequest returns a new DoH request given a dns.Msg.
@@ -63,7 +70,7 @@ func (dc *dohClient) doRequest(req *http.Request) (msg *D.Msg, err error) {
 	}
 	defer resp.Body.Close()
 
-	buf, err := ioutil.ReadAll(resp.Body)
+	buf, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return nil, err
 	}
@@ -76,7 +83,6 @@ func newDoHClient(url string, r *Resolver) *dohClient {
 	return &dohClient{
 		url: url,
 		transport: &http.Transport{
-			TLSClientConfig:   &tls.Config{ClientSessionCache: globalSessionCache},
 			ForceAttemptHTTP2: true,
 			DialContext: func(ctx context.Context, network, addr string) (net.Conn, error) {
 				host, port, err := net.SplitHostPort(addr)

dns/enhancer.go

@@ -5,20 +5,21 @@ import (
 
 	"github.com/Dreamacro/clash/common/cache"
 	"github.com/Dreamacro/clash/component/fakeip"
+	C "github.com/Dreamacro/clash/constant"
 )
 
 type ResolverEnhancer struct {
-	mode     EnhancedMode
+	mode     C.DNSMode
 	fakePool *fakeip.Pool
 	mapping  *cache.LruCache
 }
 
 func (h *ResolverEnhancer) FakeIPEnabled() bool {
-	return h.mode == FAKEIP
+	return h.mode == C.DNSFakeIP
 }
 
 func (h *ResolverEnhancer) MappingEnabled() bool {
-	return h.mode == FAKEIP || h.mode == MAPPING
+	return h.mode == C.DNSFakeIP || h.mode == C.DNSMapping
 }
 
 func (h *ResolverEnhancer) IsExistFakeIP(ip net.IP) bool {
@@ -67,7 +68,7 @@ func (h *ResolverEnhancer) PatchFrom(o *ResolverEnhancer) {
 	}
 
 	if h.fakePool != nil && o.fakePool != nil {
-		h.fakePool.PatchFrom(o.fakePool)
+		h.fakePool.CloneFrom(o.fakePool)
 	}
 }
 
@@ -75,7 +76,7 @@ func NewEnhancer(cfg Config) *ResolverEnhancer {
 	var fakePool *fakeip.Pool
 	var mapping *cache.LruCache
 
-	if cfg.EnhancedMode != NORMAL {
+	if cfg.EnhancedMode != C.DNSNormal {
 		fakePool = cfg.Pool
 		mapping = cache.NewLRUCache(cache.WithSize(4096), cache.WithStale(true))
 	}

dns/filters.go

@@ -2,6 +2,7 @@ package dns
 
 import (
 	"net"
+	"strings"
 
 	"github.com/Dreamacro/clash/component/mmdb"
 	"github.com/Dreamacro/clash/component/trie"
@@ -11,11 +12,13 @@ type fallbackIPFilter interface {
 	Match(net.IP) bool
 }
 
-type geoipFilter struct{}
+type geoipFilter struct {
+	code string
+}
 
 func (gf *geoipFilter) Match(ip net.IP) bool {
 	record, _ := mmdb.Instance().Country(ip)
-	return record.Country.IsoCode != "CN" && record.Country.IsoCode != ""
+	return !strings.EqualFold(record.Country.IsoCode, gf.code) && !ip.IsPrivate()
 }
 
 type ipnetFilter struct {
@@ -29,6 +32,7 @@ func (inf *ipnetFilter) Match(ip net.IP) bool {
 type fallbackDomainFilter interface {
 	Match(domain string) bool
 }
+
 type domainFilter struct {
 	tree *trie.DomainTrie
 }