Fix: use 1.17.x on github actions

Co-authored-by: ShinyGwyn <79344143+ShinyGwyn@users.noreply.github.com>

.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/codeql-analysis.yml

@@ -0,0 +1,30 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ master, dev ]
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'go' ]
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      with:
+        languages: ${{ matrix.language }}
+
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v1
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1

.github/workflows/docker.yml

@@ -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/go.yml

@@ -9,7 +9,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.16
+          go-version: 1.17.x
 
       - name: Check out code into the Go module directory
         uses: actions/checkout@v2
@@ -39,9 +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
-          prerelease: 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

Makefile

@@ -22,11 +22,13 @@ PLATFORM_LIST = \
 	linux-mips64 \
 	linux-mips64le \
 	freebsd-386 \
-	freebsd-amd64
+	freebsd-amd64 \
+	freebsd-arm64
 
 WINDOWS_ARCH_LIST = \
 	windows-386 \
 	windows-amd64 \
+	windows-arm64 \
 	windows-arm32v7
 
 all: linux-amd64 darwin-amd64 windows-amd64 # Most used
@@ -82,12 +84,18 @@ freebsd-386:
 freebsd-amd64:
 	GOARCH=amd64 GOOS=freebsd $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
 
+freebsd-arm64:
+	GOARCH=arm64 GOOS=freebsd $(GOBUILD) -o $(BINDIR)/$(NAME)-$@
+
 windows-386:
 	GOARCH=386 GOOS=windows $(GOBUILD) -o $(BINDIR)/$(NAME)-$@.exe
 
 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
 

README.md

@@ -40,6 +40,9 @@ 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)
@@ -57,4 +60,3 @@ This software is released under the GPL-3.0 license.
 - [x] Redir proxy
 - [x] UDP support
 - [x] Connection manager
-- [ ] ~~Event API~~

adapter/adapter.go

@@ -1,11 +1,12 @@
-package outbound
+package adapter
 
 import (
 	"context"
 	"encoding/json"
-	"errors"
+	"fmt"
 	"net"
 	"net/http"
+	"net/url"
 	"time"
 
 	"github.com/Dreamacro/clash/common/queue"
@@ -14,101 +15,25 @@ import (
 	"go.uber.org/atomic"
 )
 
-type Base struct {
-	name string
-	addr string
-	tp   C.AdapterType
-	udp  bool
-}
-
-func (b *Base) Name() string {
-	return b.name
-}
-
-func (b *Base) Type() C.AdapterType {
-	return b.tp
-}
-
-func (b *Base) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
-	return c, errors.New("no support")
-}
-
-func (b *Base) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
-	return nil, errors.New("no support")
-}
-
-func (b *Base) SupportUDP() bool {
-	return b.udp
-}
-
-func (b *Base) MarshalJSON() ([]byte, error) {
-	return json.Marshal(map[string]string{
-		"type": b.Type().String(),
-	})
-}
-
-func (b *Base) Addr() string {
-	return b.addr
-}
-
-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
-}
-
-func (c *conn) Chains() C.Chain {
-	return c.chain
-}
-
-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
-}
-
-func (c *packetConn) Chains() C.Chain {
-	return c.chain
-}
-
-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
 	alive   *atomic.Bool
 }
 
+// Alive implements C.Proxy
 func (p *Proxy) Alive() bool {
 	return p.alive.Load()
 }
 
+// Dial implements C.Proxy
 func (p *Proxy) Dial(metadata *C.Metadata) (C.Conn, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), 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) {
 	conn, err := p.ProxyAdapter.DialContext(ctx, metadata)
 	if err != nil {
@@ -117,6 +42,7 @@ func (p *Proxy) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn,
 	return conn, err
 }
 
+// DelayHistory implements C.Proxy
 func (p *Proxy) DelayHistory() []C.DelayHistory {
 	queue := p.history.Copy()
 	histories := []C.DelayHistory{}
@@ -127,6 +53,7 @@ func (p *Proxy) DelayHistory() []C.DelayHistory {
 }
 
 // LastDelay return last history record. if proxy is not alive, return the max value of uint16.
+// implements C.Proxy
 func (p *Proxy) LastDelay() (delay uint16) {
 	var max uint16 = 0xffff
 	if !p.alive.Load() {
@@ -144,6 +71,7 @@ func (p *Proxy) LastDelay() (delay uint16) {
 	return history.Delay
 }
 
+// MarshalJSON implements C.ProxyAdapter
 func (p *Proxy) MarshalJSON() ([]byte, error) {
 	inner, err := p.ProxyAdapter.MarshalJSON()
 	if err != nil {
@@ -154,10 +82,12 @@ 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)
 }
 
 // URLTest get the delay for the specified URL
+// implements C.Proxy
 func (p *Proxy) URLTest(ctx context.Context, url string) (t uint16, err error) {
 	defer func() {
 		p.alive.Store(err == nil)
@@ -206,6 +136,8 @@ 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
@@ -218,3 +150,31 @@ 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/https.go

@@ -8,7 +8,7 @@ import (
 	"github.com/Dreamacro/clash/context"
 )
 
-// NewHTTPS recieve CONNECT request and return ConnContext
+// NewHTTPS receive CONNECT request and return ConnContext
 func NewHTTPS(request *http.Request, conn net.Conn) *context.ConnContext {
 	metadata := parseHTTPAddr(request)
 	metadata.Type = C.HTTPCONNECT

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

@@ -3,12 +3,12 @@ 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 recieve TCP inbound and return ConnContext
+// NewSocket receive TCP inbound and return ConnContext
 func NewSocket(target socks5.Addr, conn net.Conn, source C.Type) *context.ConnContext {
 	metadata := parseSocksAddr(target)
 	metadata.NetWork = C.TCP

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 +1,100 @@
+package outbound
+
+import (
+	"encoding/json"
+	"errors"
+	"net"
+
+	C "github.com/Dreamacro/clash/constant"
+)
+
+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()}}
+}

adapter/outbound/direct.go

@@ -12,10 +12,9 @@ type Direct struct {
 	*Base
 }
 
+// DialContext implements C.ProxyAdapter
 func (d *Direct) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
-	address := net.JoinHostPort(metadata.String(), metadata.DstPort)
+	c, err := dialer.DialContext(ctx, "tcp", metadata.RemoteAddress())
-
-	c, err := dialer.DialContext(ctx, "tcp", address)
 	if err != nil {
 		return nil, err
 	}
@@ -23,8 +22,9 @@ func (d *Direct) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn,
 	return NewConn(c, d), nil
 }
 
+// DialUDP implements C.ProxyAdapter
 func (d *Direct) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
-	pc, err := dialer.ListenPacket("udp", "")
+	pc, err := dialer.ListenPacket(context.Background(), "udp", "")
 	if err != nil {
 		return nil, err
 	}

adapter/outbound/http.go

@@ -35,6 +35,7 @@ type HttpOption struct {
 	SkipCertVerify bool   `proxy:"skip-cert-verify,omitempty"`
 }
 
+// StreamConn implements C.ProxyAdapter
 func (h *Http) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 	if h.tlsConfig != nil {
 		cc := tls.Client(c, h.tlsConfig)
@@ -51,13 +52,16 @@ func (h *Http) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 	return c, nil
 }
 
-func (h *Http) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
+// DialContext implements C.ProxyAdapter
+func (h *Http) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
 	c, err := dialer.DialContext(ctx, "tcp", h.addr)
 	if err != nil {
 		return nil, fmt.Errorf("%s connect error: %w", h.addr, err)
 	}
 	tcpKeepAlive(c)
 
+	defer safeConnClose(c, err)
+
 	c, err = h.StreamConn(c, metadata)
 	if err != nil {
 		return nil, err
@@ -121,7 +125,6 @@ func NewHttp(option HttpOption) *Http {
 		}
 		tlsConfig = &tls.Config{
 			InsecureSkipVerify: option.SkipCertVerify,
-			ClientSessionCache: getClientSessionCache(),
 			ServerName:         sni,
 		}
 	}

adapter/outbound/reject.go

@@ -14,10 +14,12 @@ type Reject struct {
 	*Base
 }
 
+// DialContext implements C.ProxyAdapter
 func (r *Reject) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
 	return NewConn(&NopConn{}, r), nil
 }
 
+// DialUDP implements C.ProxyAdapter
 func (r *Reject) DialUDP(metadata *C.Metadata) (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"
 )
@@ -54,6 +53,7 @@ type v2rayObfsOption struct {
 	Mux            bool              `obfs:"mux,omitempty"`
 }
 
+// StreamConn implements C.ProxyAdapter
 func (ss *ShadowSocks) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 	switch ss.obfsMode {
 	case "tls":
@@ -73,25 +73,30 @@ func (ss *ShadowSocks) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, e
 	return c, err
 }
 
-func (ss *ShadowSocks) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
+// DialContext implements C.ProxyAdapter
+func (ss *ShadowSocks) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
 	c, err := dialer.DialContext(ctx, "tcp", ss.addr)
 	if err != nil {
 		return nil, fmt.Errorf("%s connect error: %w", ss.addr, err)
 	}
 	tcpKeepAlive(c)
 
+	defer safeConnClose(c, err)
+
 	c, err = ss.StreamConn(c, metadata)
 	return NewConn(c, ss), err
 }
 
+// DialUDP implements C.ProxyAdapter
 func (ss *ShadowSocks) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
-	pc, err := dialer.ListenPacket("udp", "")
+	pc, err := dialer.ListenPacket(context.Background(), "udp", "")
 	if err != nil {
 		return nil, err
 	}
 
 	addr, err := resolveUDPAddr("udp", ss.addr)
 	if err != nil {
+		pc.Close()
 		return nil, err
 	}
 
@@ -99,12 +104,6 @@ func (ss *ShadowSocks) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
 	return newPacketConn(&ssPacketConn{PacketConn: pc, rAddr: addr}, ss), nil
 }
 
-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
@@ -150,7 +149,6 @@ func NewShadowSocks(option ShadowSocksOption) (*ShadowSocks, error) {
 		if opts.TLS {
 			v2rayOption.TLS = true
 			v2rayOption.SkipCertVerify = opts.SkipCertVerify
-			v2rayOption.SessionCache = getClientSessionCache()
 		}
 	}
 

adapter/outbound/shadowsocksr.go

@@ -2,15 +2,15 @@ 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"
 	"github.com/Dreamacro/go-shadowsocks2/shadowstream"
@@ -36,6 +36,7 @@ type ShadowSocksROption struct {
 	UDP           bool   `proxy:"udp,omitempty"`
 }
 
+// StreamConn implements C.ProxyAdapter
 func (ssr *ShadowSocksR) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 	c = ssr.obfs.StreamConn(c)
 	c = ssr.cipher.StreamConn(c)
@@ -57,25 +58,30 @@ func (ssr *ShadowSocksR) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn,
 	return c, err
 }
 
-func (ssr *ShadowSocksR) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
+// DialContext implements C.ProxyAdapter
+func (ssr *ShadowSocksR) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
 	c, err := dialer.DialContext(ctx, "tcp", ssr.addr)
 	if err != nil {
 		return nil, fmt.Errorf("%s connect error: %w", ssr.addr, err)
 	}
 	tcpKeepAlive(c)
 
+	defer safeConnClose(c, err)
+
 	c, err = ssr.StreamConn(c, metadata)
 	return NewConn(c, ssr), err
 }
 
+// DialUDP implements C.ProxyAdapter
 func (ssr *ShadowSocksR) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
-	pc, err := dialer.ListenPacket("udp", "")
+	pc, err := dialer.ListenPacket(context.Background(), "udp", "")
 	if err != nil {
 		return nil, err
 	}
 
 	addr, err := resolveUDPAddr("udp", ssr.addr)
 	if err != nil {
+		pc.Close()
 		return nil, err
 	}
 
@@ -84,12 +90,6 @@ func (ssr *ShadowSocksR) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
 	return newPacketConn(&ssPacketConn{PacketConn: pc, rAddr: addr}, ssr), nil
 }
 
-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

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 {
@@ -48,6 +48,7 @@ func streamConn(c net.Conn, option streamOption) *snell.Snell {
 	return snell.StreamConn(c, option.psk, option.version)
 }
 
+// StreamConn implements C.ProxyAdapter
 func (s *Snell) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 	c = streamConn(c, streamOption{s.psk, s.version, s.addr, s.obfsOption})
 	port, _ := strconv.Atoi(metadata.DstPort)
@@ -55,7 +56,8 @@ func (s *Snell) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 	return c, err
 }
 
-func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
+// DialContext implements C.ProxyAdapter
+func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
 	if s.version == snell.Version2 {
 		c, err := s.pool.Get()
 		if err != nil {
@@ -63,7 +65,10 @@ func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn,
 		}
 
 		port, _ := strconv.Atoi(metadata.DstPort)
-		err = snell.WriteHeader(c, metadata.String(), uint(port), s.version)
+		if err = snell.WriteHeader(c, metadata.String(), uint(port), s.version); err != nil {
+			c.Close()
+			return nil, err
+		}
 		return NewConn(c, s), err
 	}
 
@@ -73,6 +78,8 @@ func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn,
 	}
 	tcpKeepAlive(c)
 
+	defer safeConnClose(c, err)
+
 	c, err = s.StreamConn(c, metadata)
 	return NewConn(c, s), err
 }

adapter/outbound/socks5.go

@@ -11,8 +11,8 @@ import (
 	"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 {
@@ -35,6 +35,7 @@ type Socks5Option struct {
 	SkipCertVerify bool   `proxy:"skip-cert-verify,omitempty"`
 }
 
+// StreamConn implements C.ProxyAdapter
 func (ss *Socks5) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 	if ss.tls {
 		cc := tls.Client(c, ss.tlsConfig)
@@ -58,13 +59,16 @@ func (ss *Socks5) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error)
 	return c, nil
 }
 
-func (ss *Socks5) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
+// DialContext implements C.ProxyAdapter
+func (ss *Socks5) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
 	c, err := dialer.DialContext(ctx, "tcp", ss.addr)
 	if err != nil {
 		return nil, fmt.Errorf("%s connect error: %w", ss.addr, err)
 	}
 	tcpKeepAlive(c)
 
+	defer safeConnClose(c, err)
+
 	c, err = ss.StreamConn(c, metadata)
 	if err != nil {
 		return nil, err
@@ -73,8 +77,9 @@ func (ss *Socks5) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn
 	return NewConn(c, ss), nil
 }
 
+// DialUDP implements C.ProxyAdapter
 func (ss *Socks5) DialUDP(metadata *C.Metadata) (_ C.PacketConn, err error) {
-	ctx, cancel := context.WithTimeout(context.Background(), tcpTimeout)
+	ctx, cancel := context.WithTimeout(context.Background(), C.DefaultTCPTimeout)
 	defer cancel()
 	c, err := dialer.DialContext(ctx, "tcp", ss.addr)
 	if err != nil {
@@ -88,11 +93,7 @@ func (ss *Socks5) DialUDP(metadata *C.Metadata) (_ C.PacketConn, err error) {
 		c = cc
 	}
 
-	defer func() {
+	defer safeConnClose(c, err)
-		if err != nil {
-			c.Close()
-		}
-	}()
 
 	tcpKeepAlive(c)
 	var user *socks5.User
@@ -109,7 +110,7 @@ func (ss *Socks5) DialUDP(metadata *C.Metadata) (_ C.PacketConn, err error) {
 		return
 	}
 
-	pc, err := dialer.ListenPacket("udp", "")
+	pc, err := dialer.ListenPacket(context.Background(), "udp", "")
 	if err != nil {
 		return
 	}
@@ -144,7 +145,6 @@ func NewSocks5(option Socks5Option) *Socks5 {
 	if option.TLS {
 		tlsConfig = &tls.Config{
 			InsecureSkipVerify: option.SkipCertVerify,
-			ClientSessionCache: getClientSessionCache(),
 			ServerName:         option.Server,
 		}
 	}

adapter/outbound/trojan.go

@@ -0,0 +1,176 @@
+package outbound
+
+import (
+	"context"
+	"crypto/tls"
+	"fmt"
+	"net"
+	"strconv"
+
+	"github.com/Dreamacro/clash/component/dialer"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/transport/gun"
+	"github.com/Dreamacro/clash/transport/trojan"
+
+	"golang.org/x/net/http2"
+)
+
+type Trojan struct {
+	*Base
+	instance *trojan.Trojan
+
+	// for gun mux
+	gunTLSConfig *tls.Config
+	gunConfig    *gun.Config
+	transport    *http2.Transport
+}
+
+type TrojanOption struct {
+	Name           string      `proxy:"name"`
+	Server         string      `proxy:"server"`
+	Port           int         `proxy:"port"`
+	Password       string      `proxy:"password"`
+	ALPN           []string    `proxy:"alpn,omitempty"`
+	SNI            string      `proxy:"sni,omitempty"`
+	SkipCertVerify bool        `proxy:"skip-cert-verify,omitempty"`
+	UDP            bool        `proxy:"udp,omitempty"`
+	Network        string      `proxy:"network,omitempty"`
+	GrpcOpts       GrpcOptions `proxy:"grpc-opts,omitempty"`
+}
+
+// StreamConn implements C.ProxyAdapter
+func (t *Trojan) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+	var err error
+	if t.transport != nil {
+		c, err = gun.StreamGunWithConn(c, t.gunTLSConfig, t.gunConfig)
+	} else {
+		c, err = t.instance.StreamConn(c)
+	}
+
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
+	}
+
+	err = t.instance.WriteHeader(c, trojan.CommandTCP, serializesSocksAddr(metadata))
+	return c, err
+}
+
+// DialContext implements C.ProxyAdapter
+func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
+	// gun transport
+	if t.transport != nil {
+		c, err := gun.StreamGunWithTransport(t.transport, t.gunConfig)
+		if err != nil {
+			return nil, err
+		}
+
+		if err = t.instance.WriteHeader(c, trojan.CommandTCP, serializesSocksAddr(metadata)); err != nil {
+			c.Close()
+			return nil, err
+		}
+
+		return NewConn(c, t), nil
+	}
+
+	c, err := dialer.DialContext(ctx, "tcp", t.addr)
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
+	}
+	tcpKeepAlive(c)
+
+	defer safeConnClose(c, err)
+
+	c, err = t.StreamConn(c, metadata)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewConn(c, t), err
+}
+
+// DialUDP implements C.ProxyAdapter
+func (t *Trojan) DialUDP(metadata *C.Metadata) (_ C.PacketConn, err error) {
+	var c net.Conn
+
+	// grpc transport
+	if t.transport != nil {
+		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(), C.DefaultTCPTimeout)
+		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)
+		if err != nil {
+			return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
+		}
+	}
+
+	err = t.instance.WriteHeader(c, trojan.CommandUDP, serializesSocksAddr(metadata))
+	if err != nil {
+		return nil, err
+	}
+
+	pc := t.instance.PacketConn(c)
+	return newPacketConn(pc, t), err
+}
+
+func NewTrojan(option TrojanOption) (*Trojan, error) {
+	addr := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
+
+	tOption := &trojan.Option{
+		Password:       option.Password,
+		ALPN:           option.ALPN,
+		ServerName:     option.Server,
+		SkipCertVerify: option.SkipCertVerify,
+	}
+
+	if option.SNI != "" {
+		tOption.ServerName = option.SNI
+	}
+
+	t := &Trojan{
+		Base: &Base{
+			name: option.Name,
+			addr: addr,
+			tp:   C.Trojan,
+			udp:  option.UDP,
+		},
+		instance: trojan.New(tOption),
+	}
+
+	if option.Network == "grpc" {
+		dialFn := func(network, addr string) (net.Conn, error) {
+			c, err := dialer.DialContext(context.Background(), "tcp", t.addr)
+			if err != nil {
+				return nil, fmt.Errorf("%s connect error: %s", t.addr, err.Error())
+			}
+			tcpKeepAlive(c)
+			return c, nil
+		}
+
+		tlsConfig := &tls.Config{
+			NextProtos:         option.ALPN,
+			MinVersion:         tls.VersionTLS12,
+			InsecureSkipVerify: tOption.SkipCertVerify,
+			ServerName:         tOption.ServerName,
+		}
+
+		t.transport = gun.NewHTTP2Client(dialFn, tlsConfig)
+		t.gunTLSConfig = tlsConfig
+		t.gunConfig = &gun.Config{
+			ServiceName: option.GrpcOpts.GrpcServiceName,
+			Host:        tOption.ServerName,
+		}
+	}
+
+	return t, nil
+}

adapter/outbound/util.go

@@ -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)
@@ -59,13 +18,6 @@ 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)
@@ -98,3 +50,9 @@ func resolveUDPAddr(network, address string) (*net.UDPAddr, error) {
 	}
 	return net.ResolveUDPAddr(network, net.JoinHostPort(ip.String(), port))
 }
+
+func safeConnClose(c net.Conn, err error) {
+	if err != nil {
+		c.Close()
+	}
+}

adapter/outbound/vmess.go

@@ -2,6 +2,7 @@ package outbound
 
 import (
 	"context"
+	"crypto/tls"
 	"errors"
 	"fmt"
 	"net"
@@ -11,14 +12,22 @@ import (
 
 	"github.com/Dreamacro/clash/component/dialer"
 	"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"
 )
 
 type Vmess struct {
 	*Base
 	client *vmess.Client
 	option *VmessOption
+
+	// for gun mux
+	gunTLSConfig *tls.Config
+	gunConfig    *gun.Config
+	transport    *http2.Transport
 }
 
 type VmessOption struct {
@@ -33,6 +42,8 @@ type VmessOption struct {
 	Network        string            `proxy:"network,omitempty"`
 	HTTPOpts       HTTPOptions       `proxy:"http-opts,omitempty"`
 	HTTP2Opts      HTTP2Options      `proxy:"h2-opts,omitempty"`
+	GrpcOpts       GrpcOptions       `proxy:"grpc-opts,omitempty"`
+	WSOpts         WSOptions         `proxy:"ws-opts,omitempty"`
 	WSPath         string            `proxy:"ws-path,omitempty"`
 	WSHeaders      map[string]string `proxy:"ws-headers,omitempty"`
 	SkipCertVerify bool              `proxy:"skip-cert-verify,omitempty"`
@@ -50,20 +61,41 @@ type HTTP2Options struct {
 	Path string   `proxy:"path,omitempty"`
 }
 
+type GrpcOptions struct {
+	GrpcServiceName string `proxy:"grpc-service-name,omitempty"`
+}
+
+type WSOptions struct {
+	Path                string            `proxy:"path,omitempty"`
+	Headers             map[string]string `proxy:"headers,omitempty"`
+	MaxEarlyData        int               `proxy:"max-early-data,omitempty"`
+	EarlyDataHeaderName string            `proxy:"early-data-header-name,omitempty"`
+}
+
+// StreamConn implements C.ProxyAdapter
 func (v *Vmess) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 	var err error
 	switch v.option.Network {
 	case "ws":
-		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
@@ -71,7 +103,6 @@ func (v *Vmess) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 
 		if v.option.TLS {
 			wsOpts.TLS = true
-			wsOpts.SessionCache = getClientSessionCache()
 			wsOpts.SkipCertVerify = v.option.SkipCertVerify
 			wsOpts.ServerName = v.option.ServerName
 		}
@@ -83,7 +114,6 @@ 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 != "" {
@@ -110,7 +140,6 @@ 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"},
 		}
 
@@ -129,6 +158,8 @@ func (v *Vmess) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 		}
 
 		c, err = vmess.StreamH2Conn(c, h2Opts)
+	case "grpc":
+		c, err = gun.StreamGunWithConn(c, v.gunTLSConfig, v.gunConfig)
 	default:
 		// handle TLS
 		if v.option.TLS {
@@ -136,7 +167,6 @@ 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 != "" {
@@ -154,19 +184,38 @@ func (v *Vmess) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 	return v.client.StreamConn(c, parseVmessAddr(metadata))
 }
 
-func (v *Vmess) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
+// DialContext implements C.ProxyAdapter
+func (v *Vmess) DialContext(ctx context.Context, metadata *C.Metadata) (_ C.Conn, err error) {
+	// gun transport
+	if v.transport != nil {
+		c, err := gun.StreamGunWithTransport(v.transport, v.gunConfig)
+		if err != nil {
+			return nil, err
+		}
+		defer safeConnClose(c, err)
+
+		c, err = v.client.StreamConn(c, parseVmessAddr(metadata))
+		if err != nil {
+			return nil, err
+		}
+
+		return NewConn(c, v), nil
+	}
+
 	c, err := dialer.DialContext(ctx, "tcp", v.addr)
 	if err != nil {
 		return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
 	}
 	tcpKeepAlive(c)
+	defer safeConnClose(c, err)
 
 	c, err = v.StreamConn(c, metadata)
 	return NewConn(c, v), err
 }
 
-func (v *Vmess) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
+// DialUDP implements C.ProxyAdapter
-	// vmess use stream-oriented udp, so clash needs a net.UDPAddr
+func (v *Vmess) DialUDP(metadata *C.Metadata) (_ C.PacketConn, err error) {
+	// vmess use stream-oriented udp with a special address, so we needs a net.UDPAddr
 	if !metadata.Resolved() {
 		ip, err := resolver.ResolveIP(metadata.Host)
 		if err != nil {
@@ -175,17 +224,33 @@ func (v *Vmess) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
 		metadata.DstIP = ip
 	}
 
-	ctx, cancel := context.WithTimeout(context.Background(), tcpTimeout)
+	var c net.Conn
-	defer cancel()
+	// gun transport
-	c, err := dialer.DialContext(ctx, "tcp", v.addr)
+	if v.transport != nil {
-	if err != nil {
+		c, err = gun.StreamGunWithTransport(v.transport, v.gunConfig)
-		return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
+		if err != nil {
+			return nil, err
+		}
+		defer safeConnClose(c, err)
+
+		c, err = v.client.StreamConn(c, parseVmessAddr(metadata))
+	} else {
+		ctx, cancel := context.WithTimeout(context.Background(), C.DefaultTCPTimeout)
+		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())
+		}
+		tcpKeepAlive(c)
+		defer safeConnClose(c, err)
+
+		c, err = v.StreamConn(c, metadata)
 	}
-	tcpKeepAlive(c)
+
-	c, err = v.StreamConn(c, metadata)
 	if err != nil {
 		return nil, fmt.Errorf("new vmess client error: %v", err)
 	}
+
 	return newPacketConn(&vmessPacketConn{Conn: c, rAddr: metadata.UDPAddr()}, v), nil
 }
 
@@ -197,15 +262,20 @@ func NewVmess(option VmessOption) (*Vmess, error) {
 		Security: security,
 		HostName: option.Server,
 		Port:     strconv.Itoa(option.Port),
+		IsAead:   option.AlterID == 0,
 	})
 	if err != nil {
 		return nil, err
 	}
-	if option.Network == "h2" && !option.TLS {
+
-		return nil, fmt.Errorf("TLS must be true with h2 network")
+	switch option.Network {
+	case "h2", "grpc":
+		if !option.TLS {
+			return nil, fmt.Errorf("TLS must be true with h2/grpc network")
+		}
 	}
 
-	return &Vmess{
+	v := &Vmess{
 		Base: &Base{
 			name: option.Name,
 			addr: net.JoinHostPort(option.Server, strconv.Itoa(option.Port)),
@@ -214,7 +284,44 @@ func NewVmess(option VmessOption) (*Vmess, error) {
 		},
 		client: client,
 		option: &option,
-	}, nil
+	}
+
+	switch option.Network {
+	case "h2":
+		if len(option.HTTP2Opts.Host) == 0 {
+			option.HTTP2Opts.Host = append(option.HTTP2Opts.Host, "www.example.com")
+		}
+	case "grpc":
+		dialFn := func(network, addr string) (net.Conn, error) {
+			c, err := dialer.DialContext(context.Background(), "tcp", v.addr)
+			if err != nil {
+				return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
+			}
+			tcpKeepAlive(c)
+			return c, nil
+		}
+
+		gunConfig := &gun.Config{
+			ServiceName: v.option.GrpcOpts.GrpcServiceName,
+			Host:        v.option.ServerName,
+		}
+		tlsConfig := &tls.Config{
+			InsecureSkipVerify: v.option.SkipCertVerify,
+			ServerName:         v.option.ServerName,
+		}
+
+		if v.option.ServerName == "" {
+			host, _, _ := net.SplitHostPort(v.addr)
+			tlsConfig.ServerName = host
+			gunConfig.Host = host
+		}
+
+		v.gunTLSConfig = tlsConfig
+		v.gunConfig = gunConfig
+		v.transport = gun.NewHTTP2Client(dialFn, tlsConfig)
+	}
+
+	return v, nil
 }
 
 func parseVmessAddr(metadata *C.Metadata) *vmess.DstAddr {

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 +4,10 @@ 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"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/constant/provider"
 )
 
 type Fallback struct {
@@ -22,6 +22,7 @@ func (f *Fallback) Now() string {
 	return proxy.Name()
 }
 
+// DialContext implements C.ProxyAdapter
 func (f *Fallback) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
 	proxy := f.findAliveProxy(true)
 	c, err := proxy.DialContext(ctx, metadata)
@@ -31,6 +32,7 @@ func (f *Fallback) DialContext(ctx context.Context, metadata *C.Metadata) (C.Con
 	return c, err
 }
 
+// DialUDP implements C.ProxyAdapter
 func (f *Fallback) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
 	proxy := f.findAliveProxy(true)
 	pc, err := proxy.DialUDP(metadata)
@@ -40,6 +42,7 @@ func (f *Fallback) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
 	return pc, err
 }
 
+// SupportUDP implements C.ProxyAdapter
 func (f *Fallback) SupportUDP() bool {
 	if f.disableUDP {
 		return false
@@ -49,6 +52,7 @@ func (f *Fallback) SupportUDP() bool {
 	return proxy.SupportUDP()
 }
 
+// MarshalJSON implements C.ProxyAdapter
 func (f *Fallback) MarshalJSON() ([]byte, error) {
 	var all []string
 	for _, proxy := range f.proxies(false) {
@@ -61,6 +65,7 @@ func (f *Fallback) MarshalJSON() ([]byte, error) {
 	})
 }
 
+// Unwrap implements C.ProxyAdapter
 func (f *Fallback) Unwrap(metadata *C.Metadata) C.Proxy {
 	proxy := f.findAliveProxy(true)
 	return proxy

adapter/outboundgroup/loadbalance.go

@@ -7,11 +7,11 @@ 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"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/constant/provider"
 
 	"golang.org/x/net/publicsuffix"
 )
@@ -68,6 +68,7 @@ func jumpHash(key uint64, buckets int32) int32 {
 	return int32(b)
 }
 
+// DialContext implements C.ProxyAdapter
 func (lb *LoadBalance) DialContext(ctx context.Context, metadata *C.Metadata) (c C.Conn, err error) {
 	defer func() {
 		if err == nil {
@@ -81,6 +82,7 @@ func (lb *LoadBalance) DialContext(ctx context.Context, metadata *C.Metadata) (c
 	return
 }
 
+// DialUDP implements C.ProxyAdapter
 func (lb *LoadBalance) DialUDP(metadata *C.Metadata) (pc C.PacketConn, err error) {
 	defer func() {
 		if err == nil {
@@ -93,6 +95,7 @@ func (lb *LoadBalance) DialUDP(metadata *C.Metadata) (pc C.PacketConn, err error
 	return proxy.DialUDP(metadata)
 }
 
+// SupportUDP implements C.ProxyAdapter
 func (lb *LoadBalance) SupportUDP() bool {
 	return !lb.disableUDP
 }
@@ -130,6 +133,7 @@ func strategyConsistentHashing() strategyFn {
 	}
 }
 
+// Unwrap implements C.ProxyAdapter
 func (lb *LoadBalance) Unwrap(metadata *C.Metadata) C.Proxy {
 	proxies := lb.proxies(true)
 	return lb.strategyFn(proxies, metadata)
@@ -143,6 +147,7 @@ func (lb *LoadBalance) proxies(touch bool) []C.Proxy {
 	return elm.([]C.Proxy)
 }
 
+// MarshalJSON implements C.ProxyAdapter
 func (lb *LoadBalance) MarshalJSON() ([]byte, error) {
 	var all []string
 	for _, proxy := range lb.proxies(false) {

adapter/outboundgroup/parser.go

@@ -4,9 +4,10 @@ import (
 	"errors"
 	"fmt"
 
-	"github.com/Dreamacro/clash/adapters/provider"
+	"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 (
@@ -28,7 +29,7 @@ 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 +45,7 @@ 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 +139,15 @@ 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 {
@@ -19,11 +18,22 @@ type Relay struct {
 	providers []provider.ProxyProvider
 }
 
+// DialContext implements C.ProxyAdapter
 func (r *Relay) DialContext(ctx context.Context, metadata *C.Metadata) (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)
+	case 1:
+		return proxies[0].DialContext(ctx, metadata)
+	}
+
 	first := proxies[0]
 	last := proxies[len(proxies)-1]
 
@@ -56,6 +66,7 @@ func (r *Relay) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn,
 	return outbound.NewConn(c, r), nil
 }
 
+// MarshalJSON implements C.ProxyAdapter
 func (r *Relay) MarshalJSON() ([]byte, error) {
 	var all []string
 	for _, proxy := range r.rawProxies(false) {

adapter/outboundgroup/selector.go

@@ -5,10 +5,10 @@ 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"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/constant/provider"
 )
 
 type Selector struct {
@@ -19,6 +19,7 @@ type Selector struct {
 	providers  []provider.ProxyProvider
 }
 
+// DialContext implements C.ProxyAdapter
 func (s *Selector) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
 	c, err := s.selectedProxy(true).DialContext(ctx, metadata)
 	if err == nil {
@@ -27,6 +28,7 @@ func (s *Selector) DialContext(ctx context.Context, metadata *C.Metadata) (C.Con
 	return c, err
 }
 
+// DialUDP implements C.ProxyAdapter
 func (s *Selector) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
 	pc, err := s.selectedProxy(true).DialUDP(metadata)
 	if err == nil {
@@ -35,6 +37,7 @@ func (s *Selector) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
 	return pc, err
 }
 
+// SupportUDP implements C.ProxyAdapter
 func (s *Selector) SupportUDP() bool {
 	if s.disableUDP {
 		return false
@@ -43,6 +46,7 @@ func (s *Selector) SupportUDP() bool {
 	return s.selectedProxy(false).SupportUDP()
 }
 
+// MarshalJSON implements C.ProxyAdapter
 func (s *Selector) MarshalJSON() ([]byte, error) {
 	var all []string
 	for _, proxy := range getProvidersProxies(s.providers, false) {
@@ -72,6 +76,7 @@ func (s *Selector) Set(name string) error {
 	return errors.New("proxy not exist")
 }
 
+// Unwrap implements C.ProxyAdapter
 func (s *Selector) Unwrap(metadata *C.Metadata) C.Proxy {
 	return s.selectedProxy(true)
 }

adapter/outboundgroup/urltest.go

@@ -5,10 +5,10 @@ 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"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/constant/provider"
 )
 
 type urlTestOption func(*URLTest)
@@ -33,6 +33,7 @@ func (u *URLTest) Now() string {
 	return u.fast(false).Name()
 }
 
+// DialContext implements C.ProxyAdapter
 func (u *URLTest) DialContext(ctx context.Context, metadata *C.Metadata) (c C.Conn, err error) {
 	c, err = u.fast(true).DialContext(ctx, metadata)
 	if err == nil {
@@ -41,6 +42,7 @@ func (u *URLTest) DialContext(ctx context.Context, metadata *C.Metadata) (c C.Co
 	return c, err
 }
 
+// DialUDP implements C.ProxyAdapter
 func (u *URLTest) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
 	pc, err := u.fast(true).DialUDP(metadata)
 	if err == nil {
@@ -49,6 +51,7 @@ func (u *URLTest) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
 	return pc, err
 }
 
+// Unwrap implements C.ProxyAdapter
 func (u *URLTest) Unwrap(metadata *C.Metadata) C.Proxy {
 	return u.fast(true)
 }
@@ -66,7 +69,13 @@ func (u *URLTest) fast(touch bool) C.Proxy {
 		proxies := u.proxies(touch)
 		fast := proxies[0]
 		min := fast.LastDelay()
+		fastNotExist := true
+
 		for _, proxy := range proxies[1:] {
+			if u.fastNode != nil && proxy.Name() == u.fastNode.Name() {
+				fastNotExist = false
+			}
+
 			if !proxy.Alive() {
 				continue
 			}
@@ -79,7 +88,7 @@ func (u *URLTest) fast(touch bool) C.Proxy {
 		}
 
 		// tolerance
-		if u.fastNode == nil || u.fastNode.LastDelay() > fast.LastDelay()+u.tolerance {
+		if u.fastNode == nil || fastNotExist || !u.fastNode.Alive() || u.fastNode.LastDelay() > fast.LastDelay()+u.tolerance {
 			u.fastNode = fast
 		}
 
@@ -89,6 +98,7 @@ func (u *URLTest) fast(touch bool) C.Proxy {
 	return elm.(C.Proxy)
 }
 
+// SupportUDP implements C.ProxyAdapter
 func (u *URLTest) SupportUDP() bool {
 	if u.disableUDP {
 		return false
@@ -97,6 +107,7 @@ func (u *URLTest) SupportUDP() bool {
 	return u.fast(false).SupportUDP()
 }
 
+// MarshalJSON implements C.ProxyAdapter
 func (u *URLTest) MarshalJSON() ([]byte, error) {
 	var all []string
 	for _, proxy := range u.proxies(false) {

adapter/outboundgroup/util.go

@@ -16,25 +16,7 @@ func addrToMetadata(rawAddress string) (addr *C.Metadata, err error) {
 	}
 
 	ip := net.ParseIP(host)
-	if ip != nil {
+	if ip == nil {
-		if ip.To4() != nil {
-			addr = &C.Metadata{
-				AddrType: C.AtypIPv4,
-				Host:     "",
-				DstIP:    ip,
-				DstPort:  port,
-			}
-			return
-		} else {
-			addr = &C.Metadata{
-				AddrType: C.AtypIPv6,
-				Host:     "",
-				DstIP:    ip,
-				DstPort:  port,
-			}
-			return
-		}
-	} else {
 		addr = &C.Metadata{
 			AddrType: C.AtypDomainName,
 			Host:     host,
@@ -42,7 +24,23 @@ func addrToMetadata(rawAddress string) (addr *C.Metadata, err error) {
 			DstPort:  port,
 		}
 		return
+	} else if ip4 := ip.To4(); ip4 != nil {
+		addr = &C.Metadata{
+			AddrType: C.AtypIPv4,
+			Host:     "",
+			DstIP:    ip4,
+			DstPort:  port,
+		}
+		return
 	}
+
+	addr = &C.Metadata{
+		AddrType: C.AtypIPv6,
+		Host:     "",
+		DstIP:    ip,
+		DstPort:  port,
+	}
+	return
 }
 
 func tcpKeepAlive(c net.Conn) {

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

@@ -8,6 +8,7 @@ import (
 	"path/filepath"
 	"time"
 
+	types "github.com/Dreamacro/clash/constant/provider"
 	"github.com/Dreamacro/clash/log"
 )
 
@@ -20,7 +21,7 @@ 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 +34,7 @@ func (f *fetcher) Name() string {
 	return f.name
 }
 
-func (f *fetcher) VehicleType() VehicleType {
+func (f *fetcher) VehicleType() types.VehicleType {
 	return f.vehicle.Type()
 }
 
@@ -72,9 +73,11 @@ func (f *fetcher) Initial() (interface{}, error) {
 		if err != nil {
 			return nil, err
 		}
+
+		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
 		}
@@ -108,7 +111,7 @@ 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
 		}
@@ -165,7 +168,7 @@ func safeWrite(path string, buf []byte) error {
 	return ioutil.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

@@ -7,6 +7,7 @@ import (
 
 	"github.com/Dreamacro/clash/common/structure"
 	C "github.com/Dreamacro/clash/constant"
+	types "github.com/Dreamacro/clash/constant/provider"
 )
 
 var (
@@ -28,7 +29,7 @@ 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{
@@ -40,7 +41,7 @@ func ParseProxyProvider(name string, mapping map[string]interface{}) (ProxyProvi
 		return nil, err
 	}
 
-	var hcInterval uint = 0
+	var hcInterval uint
 	if schema.HealthCheck.Enable {
 		hcInterval = uint(schema.HealthCheck.Interval)
 	}
@@ -48,7 +49,7 @@ 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

@@ -3,48 +3,21 @@ package provider
 import (
 	"context"
 	"io/ioutil"
+	"net"
 	"net/http"
 	"net/url"
 	"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 {
@@ -64,8 +37,8 @@ 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 +72,9 @@ 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}

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 recieve 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
-}

adapters/outbound/trojan.go

@@ -1,107 +0,0 @@
-package outbound
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"net"
-	"strconv"
-
-	"github.com/Dreamacro/clash/component/dialer"
-	"github.com/Dreamacro/clash/component/trojan"
-	C "github.com/Dreamacro/clash/constant"
-)
-
-type Trojan struct {
-	*Base
-	instance *trojan.Trojan
-}
-
-type TrojanOption struct {
-	Name           string   `proxy:"name"`
-	Server         string   `proxy:"server"`
-	Port           int      `proxy:"port"`
-	Password       string   `proxy:"password"`
-	ALPN           []string `proxy:"alpn,omitempty"`
-	SNI            string   `proxy:"sni,omitempty"`
-	SkipCertVerify bool     `proxy:"skip-cert-verify,omitempty"`
-	UDP            bool     `proxy:"udp,omitempty"`
-}
-
-func (t *Trojan) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
-	c, err := t.instance.StreamConn(c)
-	if err != nil {
-		return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
-	}
-
-	err = t.instance.WriteHeader(c, trojan.CommandTCP, serializesSocksAddr(metadata))
-	return c, err
-}
-
-func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata) (C.Conn, error) {
-	c, err := dialer.DialContext(ctx, "tcp", t.addr)
-	if err != nil {
-		return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
-	}
-	tcpKeepAlive(c)
-	c, err = t.StreamConn(c, metadata)
-	if err != nil {
-		return nil, err
-	}
-
-	return NewConn(c, t), err
-}
-
-func (t *Trojan) DialUDP(metadata *C.Metadata) (C.PacketConn, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), tcpTimeout)
-	defer cancel()
-	c, err := dialer.DialContext(ctx, "tcp", t.addr)
-	if err != nil {
-		return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
-	}
-	tcpKeepAlive(c)
-	c, err = t.instance.StreamConn(c)
-	if err != nil {
-		return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
-	}
-
-	err = t.instance.WriteHeader(c, trojan.CommandUDP, serializesSocksAddr(metadata))
-	if err != nil {
-		return nil, err
-	}
-
-	pc := t.instance.PacketConn(c)
-	return newPacketConn(pc, t), err
-}
-
-func (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,
-		ALPN:               option.ALPN,
-		ServerName:         option.Server,
-		SkipCertVerify:     option.SkipCertVerify,
-		ClientSessionCache: getClientSessionCache(),
-	}
-
-	if option.SNI != "" {
-		tOption.ServerName = option.SNI
-	}
-
-	return &Trojan{
-		Base: &Base{
-			name: option.Name,
-			addr: addr,
-			tp:   C.Trojan,
-			udp:  option.UDP,
-		},
-		instance: trojan.New(tOption),
-	}, nil
-}

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/net/bufconn.go

@@ -1,4 +1,4 @@
-package mixed
+package net
 
 import (
 	"bufio"

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 {

common/sockopt/reuseaddr_other.go

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

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 +1,94 @@
+package dhcp
+
+import (
+	"context"
+	"errors"
+	"math/rand"
+	"net"
+
+	"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)
+
+	discovery, err := dhcpv4.NewDiscovery(randomHardware(), 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
+	}
+}
+
+func randomHardware() net.HardwareAddr {
+	addr := make(net.HardwareAddr, 6)
+
+	addr[0] = 0xff
+
+	for i := 1; i < len(addr); i++ {
+		addr[i] = byte(rand.Intn(254) + 1)
+	}
+
+	return addr
+}

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 := 0
+	if dialer.LocalAddr != nil {
+		_, port, err := net.SplitHostPort(dialer.LocalAddr.String())
+		if err == nil {
+			local, _ = strconv.Atoi(port)
+		}
+	}
+
+	addr, err := lookupLocalAddr(ifaceName, network, destination, 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.Atoi(port)
+
+	addr, err := lookupLocalAddr(ifaceName, network, nil, 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 +23,70 @@ 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 := &config{}
-	if ListenPacketHook != nil {
+
-		var err error
+	if !cfg.skipDefault {
-		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)
+	}
+
+	return lc.ListenPacket(ctx, network, address)
+}
+
+func dialContext(ctx context.Context, network string, destination net.IP, port string, options []Option) (net.Conn, error) {
+	opt := &config{}
+
+	if !opt.skipDefault {
+		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
+		}
 	}
 
-	return cfg.ListenPacket(context.Background(), network, address)
+	return dialer.DialContext(ctx, network, net.JoinHostPort(destination.String(), port))
 }
 
-func dualStackDialContext(ctx context.Context, network, address string) (net.Conn, error) {
+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 +117,6 @@ 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 +128,7 @@ 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/options.go

@@ -0,0 +1,31 @@
+package dialer
+
+var (
+	DefaultOptions []Option
+)
+
+type config struct {
+	skipDefault   bool
+	interfaceName string
+	addrReuse     bool
+}
+
+type Option func(opt *config)
+
+func WithInterface(name string) Option {
+	return func(opt *config) {
+		opt.interfaceName = name
+	}
+}
+
+func WithAddrReuse(reuse bool) Option {
+	return func(opt *config) {
+		opt.addrReuse = reuse
+	}
+}
+
+func WithSkipDefault(skip bool) Option {
+	return func(opt *config) {
+		opt.skipDefault = skip
+	}
+}

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/iface/iface.go

@@ -0,0 +1,113 @@
+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")
+var 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/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_freebsd_amd64.go

@@ -30,6 +30,10 @@ func findProcessName(network string, ip net.IP, srcPort int) (string, error) {
 		}
 	})
 
+	if defaultSearcher == nil {
+		return "", ErrPlatformNotSupport
+	}
+
 	var spath string
 	isTCP := network == TCP
 	switch network {
@@ -173,7 +177,7 @@ func (s *searcher) searchSocketPid(socket uint64) (uint32, error) {
 }
 
 func newSearcher(major int) *searcher {
-	var s *searcher = nil
+	var s *searcher
 	switch major {
 	case 11:
 		s = &searcher{
@@ -190,6 +194,8 @@ func newSearcher(major int) *searcher {
 			udpInpOffset: 8,
 		}
 	case 12:
+		fallthrough
+	case 13:
 		s = &searcher{
 			headSize:     64,
 			tcpItemSize:  744,

component/process/process_linux.go

@@ -16,14 +16,14 @@ 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
 	}
-}
+
+	return binary.LittleEndian
+}()
 
 type SocketResolver func(network string, ip net.IP, srcPort int) (inode, uid int, err error)
 type ProcessNameResolver func(inode, uid int) (name string, err error)
@@ -40,8 +40,6 @@ 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 {

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/process/process_windows.go

@@ -22,8 +22,8 @@ const (
 )
 
 var (
-	getExTcpTable uintptr
+	getExTCPTable uintptr
-	getExUdpTable uintptr
+	getExUDPTable uintptr
 	queryProcName uintptr
 
 	once sync.Once
@@ -35,12 +35,12 @@ func initWin32API() error {
 		return fmt.Errorf("LoadLibrary iphlpapi.dll failed: %s", err.Error())
 	}
 
-	getExTcpTable, err = windows.GetProcAddress(h, tcpTableFunc)
+	getExTCPTable, err = windows.GetProcAddress(h, tcpTableFunc)
 	if err != nil {
 		return fmt.Errorf("GetProcAddress of %s failed: %s", tcpTableFunc, err.Error())
 	}
 
-	getExUdpTable, err = windows.GetProcAddress(h, udpTableFunc)
+	getExUDPTable, err = windows.GetProcAddress(h, udpTableFunc)
 	if err != nil {
 		return fmt.Errorf("GetProcAddress of %s failed: %s", udpTableFunc, err.Error())
 	}
@@ -76,10 +76,10 @@ func findProcessName(network string, ip net.IP, srcPort int) (string, error) {
 	var fn uintptr
 	switch network {
 	case TCP:
-		fn = getExTcpTable
+		fn = getExTCPTable
 		class = tcpTablePidConn
 	case UDP:
-		fn = getExUdpTable
+		fn = getExUDPTable
 		class = udpTablePid
 	default:
 		return "", ErrInvalidNetwork

component/resolver/resolver.go

@@ -1,9 +1,12 @@
 package resolver
 
 import (
+	"context"
 	"errors"
+	"math/rand"
 	"net"
 	"strings"
+	"time"
 
 	"github.com/Dreamacro/clash/component/trie"
 )
@@ -18,6 +21,9 @@ var (
 
 	// DefaultHosts aim to resolve hosts
 	DefaultHosts = trie.New()
+
+	// DefaultDNSTimeout defined the default dns request timeout
+	DefaultDNSTimeout = time.Second * 5
 )
 
 var (
@@ -52,18 +58,16 @@ func ResolveIPv4(host string) (net.IP, error) {
 		return DefaultResolver.ResolveIPv4(host)
 	}
 
-	ipAddrs, err := net.LookupIP(host)
+	ctx, cancel := context.WithTimeout(context.Background(), DefaultDNSTimeout)
+	defer cancel()
+	ipAddrs, err := net.DefaultResolver.LookupIP(ctx, "ip4", host)
 	if err != nil {
 		return nil, err
+	} else if len(ipAddrs) == 0 {
+		return nil, ErrIPNotFound
 	}
 
-	for _, ip := range ipAddrs {
+	return ipAddrs[rand.Intn(len(ipAddrs))], nil
-		if ip4 := ip.To4(); ip4 != nil {
-			return ip4, nil
-		}
-	}
-
-	return nil, ErrIPNotFound
 }
 
 // ResolveIPv6 with a host, return ipv6
@@ -90,31 +94,29 @@ func ResolveIPv6(host string) (net.IP, error) {
 		return DefaultResolver.ResolveIPv6(host)
 	}
 
-	ipAddrs, err := net.LookupIP(host)
+	ctx, cancel := context.WithTimeout(context.Background(), DefaultDNSTimeout)
+	defer cancel()
+	ipAddrs, err := net.DefaultResolver.LookupIP(ctx, "ip6", host)
 	if err != nil {
 		return nil, err
+	} else if len(ipAddrs) == 0 {
+		return nil, ErrIPNotFound
 	}
 
-	for _, ip := range ipAddrs {
+	return ipAddrs[rand.Intn(len(ipAddrs))], nil
-		if ip.To4() == nil {
-			return ip, nil
-		}
-	}
-
-	return nil, ErrIPNotFound
 }
 
-// ResolveIP with a host, return ip
+// ResolveIPWithResolver same as ResolveIP, but with a resolver
-func ResolveIP(host string) (net.IP, error) {
+func ResolveIPWithResolver(host string, r Resolver) (net.IP, error) {
 	if node := DefaultHosts.Search(host); node != nil {
 		return node.Data.(net.IP), nil
 	}
 
-	if DefaultResolver != nil {
+	if r != nil {
 		if DisableIPv6 {
-			return DefaultResolver.ResolveIPv4(host)
+			return r.ResolveIPv4(host)
 		}
-		return DefaultResolver.ResolveIP(host)
+		return r.ResolveIP(host)
 	} else if DisableIPv6 {
 		return ResolveIPv4(host)
 	}
@@ -131,3 +133,8 @@ func ResolveIP(host string) (net.IP, error) {
 
 	return ipAddr.IP, nil
 }
+
+// ResolveIP with a host, return ip
+func ResolveIP(host string) (net.IP, error) {
+	return ResolveIPWithResolver(host, DefaultResolver)
+}

component/trie/domain.go

@@ -23,7 +23,7 @@ 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 +54,7 @@ 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 +91,7 @@ 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
 	}
@@ -122,11 +122,7 @@ func (t *DomainTrie) search(node *Node, parts []string) *Node {
 		}
 	}
 
-	if c := node.getChild(dotWildcard); c != nil {
+	return node.getChild(dotWildcard)
-		return c
-	}
-
-	return nil
 }
 
 // New returns a new, empty Trie.

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
@@ -64,13 +66,15 @@ type DNS struct {
 	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
@@ -91,7 +95,7 @@ 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 {
@@ -106,12 +110,14 @@ type RawDNS struct {
 	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 +174,9 @@ 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 +188,7 @@ 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
 	}
 
@@ -264,21 +271,21 @@ 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 +344,12 @@ 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 +371,9 @@ 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 +488,9 @@ 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 +510,23 @@ 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{}
 
@@ -537,6 +564,10 @@ 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")
 	}
@@ -575,6 +606,7 @@ 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

@@ -66,7 +66,7 @@ func Init(dir string) error {
 		if err != nil {
 			return fmt.Errorf("can't create file %s: %s", C.Path.Config(), err.Error())
 		}
-		f.Write([]byte(`port: 7890`))
+		f.Write([]byte(`mixed-port: 7890`))
 		f.Close()
 	}
 

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

@@ -27,6 +27,10 @@ const (
 	LoadBalance
 )
 
+const (
+	DefaultTCPTimeout = 5 * time.Second
+)
+
 type Connection interface {
 	Chains() Chain
 	AppendToChains(adapter ProxyAdapter)
@@ -69,8 +73,21 @@ type PacketConn interface {
 type ProxyAdapter interface {
 	Name() string
 	Type() AdapterType
+
+	// StreamConn wraps a protocol around net.Conn with Metadata.
+	//
+	// Examples:
+	//	conn, _ := net.Dial("tcp", "host:port")
+	//	conn, _ = adapter.StreamConn(conn, metadata)
+	//
+	// It returns a C.Conn with protocol which start with
+	// a new session (if any)
 	StreamConn(c net.Conn, metadata *Metadata) (net.Conn, error)
+
+	// DialContext return a C.Conn with protocol which
+	// contains multiplexing-related reuse logic (if any)
 	DialContext(ctx context.Context, metadata *Metadata) (Conn, error)
+
 	DialUDP(metadata *Metadata) (PacketConn, error)
 	SupportUDP() bool
 	MarshalJSON() ([]byte, error)

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"

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

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 Dial and DialUDP
+	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

@@ -2,11 +2,13 @@ package dns
 
 import (
 	"context"
+	"crypto/tls"
 	"fmt"
 	"net"
 	"strings"
 
 	"github.com/Dreamacro/clash/component/dialer"
+	"github.com/Dreamacro/clash/component/resolver"
 
 	D "github.com/miekg/dns"
 )
@@ -18,38 +20,36 @@ type client struct {
 	host 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 {
-		var err error
+		if ip, err = resolver.ResolveIPWithResolver(c.host, c.r); err != nil {
-		if ip, err = c.r.ResolveIP(c.host); 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"
+	}
+
+	conn, err := dialer.DialContext(ctx, network, net.JoinHostPort(ip.String(), c.port))
 	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 +59,17 @@ 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 +1,144 @@
+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 _, d := range dns {
+					nameserver = append(nameserver, NameServer{Addr: net.JoinHostPort(d.String(), "53")})
+				}
+
+				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

@@ -3,12 +3,12 @@ package dns
 import (
 	"bytes"
 	"context"
-	"crypto/tls"
 	"io/ioutil"
 	"net"
 	"net/http"
 
 	"github.com/Dreamacro/clash/component/dialer"
+	"github.com/Dreamacro/clash/component/resolver"
 
 	D "github.com/miekg/dns"
 )
@@ -75,7 +75,6 @@ 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)
@@ -83,12 +82,12 @@ func newDoHClient(url string, r *Resolver) *dohClient {
 					return nil, err
 				}
 
-				ip, err := r.ResolveIPv4(host)
+				ip, err := resolver.ResolveIPWithResolver(host, r)
 				if err != nil {
 					return nil, err
 				}
 
-				return dialer.DialContext(ctx, "tcp4", net.JoinHostPort(ip.String(), port))
+				return dialer.DialContext(ctx, "tcp", net.JoinHostPort(ip.String(), port))
 			},
 		},
 	}

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 {

dns/resolver.go

@@ -2,7 +2,6 @@ package dns
 
 import (
 	"context"
-	"crypto/tls"
 	"errors"
 	"fmt"
 	"math/rand"
@@ -20,10 +19,6 @@ import (
 	"golang.org/x/sync/singleflight"
 )
 
-var (
-	globalSessionCache = tls.NewLRUClientSessionCache(64)
-)
-
 type dnsClient interface {
 	Exchange(m *D.Msg) (msg *D.Msg, err error)
 	ExchangeContext(ctx context.Context, m *D.Msg) (msg *D.Msg, err error)
@@ -43,6 +38,7 @@ type Resolver struct {
 	fallbackIPFilters     []fallbackIPFilter
 	group                 singleflight.Group
 	lruCache              *cache.LruCache
+	policy                *trie.DomainTrie
 }
 
 // ResolveIP request with TypeA and TypeAAAA, priority return TypeA
@@ -91,6 +87,11 @@ func (r *Resolver) shouldIPFallback(ip net.IP) bool {
 
 // Exchange a batch of dns request, and it use cache
 func (r *Resolver) Exchange(m *D.Msg) (msg *D.Msg, err error) {
+	return r.ExchangeContext(context.Background(), m)
+}
+
+// ExchangeContext a batch of dns request with context.Context, and it use cache
+func (r *Resolver) ExchangeContext(ctx context.Context, m *D.Msg) (msg *D.Msg, err error) {
 	if len(m.Question) == 0 {
 		return nil, errors.New("should have one question at least")
 	}
@@ -102,17 +103,17 @@ func (r *Resolver) Exchange(m *D.Msg) (msg *D.Msg, err error) {
 		msg = cache.(*D.Msg).Copy()
 		if expireTime.Before(now) {
 			setMsgTTL(msg, uint32(1)) // Continue fetch
-			go r.exchangeWithoutCache(m)
+			go r.exchangeWithoutCache(ctx, m)
 		} else {
 			setMsgTTL(msg, uint32(time.Until(expireTime).Seconds()))
 		}
 		return
 	}
-	return r.exchangeWithoutCache(m)
+	return r.exchangeWithoutCache(ctx, m)
 }
 
 // ExchangeWithoutCache a batch of dns request, and it do NOT GET from cache
-func (r *Resolver) exchangeWithoutCache(m *D.Msg) (msg *D.Msg, err error) {
+func (r *Resolver) exchangeWithoutCache(ctx context.Context, m *D.Msg) (msg *D.Msg, err error) {
 	q := m.Question[0]
 
 	ret, err, shared := r.group.Do(q.String(), func() (result interface{}, err error) {
@@ -128,10 +129,13 @@ func (r *Resolver) exchangeWithoutCache(m *D.Msg) (msg *D.Msg, err error) {
 
 		isIPReq := isIPRequest(q)
 		if isIPReq {
-			return r.ipExchange(m)
+			return r.ipExchange(ctx, m)
 		}
 
-		return r.batchExchange(r.main, m)
+		if matched := r.matchPolicy(m); len(matched) != 0 {
+			return r.batchExchange(ctx, matched, m)
+		}
+		return r.batchExchange(ctx, r.main, m)
 	})
 
 	if err == nil {
@@ -144,8 +148,8 @@ func (r *Resolver) exchangeWithoutCache(m *D.Msg) (msg *D.Msg, err error) {
 	return
 }
 
-func (r *Resolver) batchExchange(clients []dnsClient, m *D.Msg) (msg *D.Msg, err error) {
+func (r *Resolver) batchExchange(ctx context.Context, clients []dnsClient, m *D.Msg) (msg *D.Msg, err error) {
-	fast, ctx := picker.WithTimeout(context.Background(), time.Second*5)
+	fast, ctx := picker.WithTimeout(ctx, resolver.DefaultDNSTimeout)
 	for _, client := range clients {
 		r := client
 		fast.Go(func() (interface{}, error) {
@@ -172,6 +176,24 @@ func (r *Resolver) batchExchange(clients []dnsClient, m *D.Msg) (msg *D.Msg, err
 	return
 }
 
+func (r *Resolver) matchPolicy(m *D.Msg) []dnsClient {
+	if r.policy == nil {
+		return nil
+	}
+
+	domain := r.msgToDomain(m)
+	if domain == "" {
+		return nil
+	}
+
+	record := r.policy.Search(domain)
+	if record == nil {
+		return nil
+	}
+
+	return record.Data.([]dnsClient)
+}
+
 func (r *Resolver) shouldOnlyQueryFallback(m *D.Msg) bool {
 	if r.fallback == nil || len(r.fallbackDomainFilters) == 0 {
 		return false
@@ -192,16 +214,21 @@ func (r *Resolver) shouldOnlyQueryFallback(m *D.Msg) bool {
 	return false
 }
 
-func (r *Resolver) ipExchange(m *D.Msg) (msg *D.Msg, err error) {
+func (r *Resolver) ipExchange(ctx context.Context, m *D.Msg) (msg *D.Msg, err error) {
+
+	if matched := r.matchPolicy(m); len(matched) != 0 {
+		res := <-r.asyncExchange(ctx, matched, m)
+		return res.Msg, res.Error
+	}
 
 	onlyFallback := r.shouldOnlyQueryFallback(m)
 
 	if onlyFallback {
-		res := <-r.asyncExchange(r.fallback, m)
+		res := <-r.asyncExchange(ctx, r.fallback, m)
 		return res.Msg, res.Error
 	}
 
-	msgCh := r.asyncExchange(r.main, m)
+	msgCh := r.asyncExchange(ctx, r.main, m)
 
 	if r.fallback == nil { // directly return if no fallback servers are available
 		res := <-msgCh
@@ -209,7 +236,7 @@ func (r *Resolver) ipExchange(m *D.Msg) (msg *D.Msg, err error) {
 		return
 	}
 
-	fallbackMsg := r.asyncExchange(r.fallback, m)
+	fallbackMsg := r.asyncExchange(ctx, r.fallback, m)
 	res := <-msgCh
 	if res.Error == nil {
 		if ips := msgToIP(res.Msg); len(ips) != 0 {
@@ -265,10 +292,10 @@ func (r *Resolver) msgToDomain(msg *D.Msg) string {
 	return ""
 }
 
-func (r *Resolver) asyncExchange(client []dnsClient, msg *D.Msg) <-chan *result {
+func (r *Resolver) asyncExchange(ctx context.Context, client []dnsClient, msg *D.Msg) <-chan *result {
 	ch := make(chan *result, 1)
 	go func() {
-		res, err := r.batchExchange(client, msg)
+		res, err := r.batchExchange(ctx, client, msg)
 		ch <- &result{Msg: res, Error: err}
 	}()
 	return ch
@@ -280,9 +307,10 @@ type NameServer struct {
 }
 
 type FallbackFilter struct {
-	GeoIP  bool
+	GeoIP     bool
-	IPCIDR []*net.IPNet
+	GeoIPCode string
-	Domain []string
+	IPCIDR    []*net.IPNet
+	Domain    []string
 }
 
 type Config struct {
@@ -293,6 +321,7 @@ type Config struct {
 	FallbackFilter FallbackFilter
 	Pool           *fakeip.Pool
 	Hosts          *trie.DomainTrie
+	Policy         map[string]NameServer
 }
 
 func NewResolver(config Config) *Resolver {
@@ -312,9 +341,18 @@ func NewResolver(config Config) *Resolver {
 		r.fallback = transform(config.Fallback, defaultResolver)
 	}
 
+	if len(config.Policy) != 0 {
+		r.policy = trie.New()
+		for domain, nameserver := range config.Policy {
+			r.policy.Insert(domain, transform([]NameServer{nameserver}, defaultResolver))
+		}
+	}
+
 	fallbackIPFilters := []fallbackIPFilter{}
 	if config.FallbackFilter.GeoIP {
-		fallbackIPFilters = append(fallbackIPFilters, &geoipFilter{})
+		fallbackIPFilters = append(fallbackIPFilters, &geoipFilter{
+			code: config.FallbackFilter.GeoIPCode,
+		})
 	}
 	for _, ipnet := range config.FallbackFilter.IPCIDR {
 		fallbackIPFilters = append(fallbackIPFilters, &ipnetFilter{ipnet: ipnet})

dns/server.go

@@ -30,6 +30,7 @@ func (s *Server) ServeDNS(w D.ResponseWriter, r *D.Msg) {
 		D.HandleFailed(w, r)
 		return
 	}
+	msg.Compress = true
 	w.WriteMsg(msg)
 }
 

dns/util.go

@@ -117,9 +117,13 @@ func isIPRequest(q D.Question) bool {
 func transform(servers []NameServer, resolver *Resolver) []dnsClient {
 	ret := []dnsClient{}
 	for _, s := range servers {
-		if s.Net == "https" {
+		switch s.Net {
+		case "https":
 			ret = append(ret, newDoHClient(s.Addr, resolver))
 			continue
+		case "dhcp":
+			ret = append(ret, newDHCPClient(s.Addr))
+			continue
 		}
 
 		host, port, _ := net.SplitHostPort(s.Addr)
@@ -127,7 +131,6 @@ func transform(servers []NameServer, resolver *Resolver) []dnsClient {
 			Client: &D.Client{
 				Net: s.Net,
 				TLSConfig: &tls.Config{
-					ClientSessionCache: globalSessionCache,
 					// alpn identifier, see https://tools.ietf.org/html/draft-hoffman-dprive-dns-tls-alpn-00#page-6
 					NextProtos: []string{"dns"},
 					ServerName: host,

go.mod

@@ -1,22 +1,32 @@
 module github.com/Dreamacro/clash
 
-go 1.16
+go 1.17
 
 require (
-	github.com/Dreamacro/go-shadowsocks2 v0.1.6
+	github.com/Dreamacro/go-shadowsocks2 v0.1.7
-	github.com/go-chi/chi v4.1.2+incompatible
+	github.com/go-chi/chi/v5 v5.0.4
-	github.com/go-chi/cors v1.1.1
+	github.com/go-chi/cors v1.2.0
 	github.com/go-chi/render v1.0.1
 	github.com/gofrs/uuid v4.0.0+incompatible
 	github.com/gorilla/websocket v1.4.2
-	github.com/miekg/dns v1.1.40
+	github.com/insomniacslk/dhcp v0.0.0-20210827173440-b95caade3eac
+	github.com/miekg/dns v1.1.43
 	github.com/oschwald/geoip2-golang v1.5.0
 	github.com/sirupsen/logrus v1.8.1
 	github.com/stretchr/testify v1.7.0
-	go.uber.org/atomic v1.7.0
+	go.uber.org/atomic v1.9.0
-	golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83
+	golang.org/x/crypto v0.0.0-20210817164053-32db794688a5
-	golang.org/x/net v0.0.0-20210226172049-e18ecbb05110
+	golang.org/x/net v0.0.0-20210903162142-ad29c8ab022f
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
-	golang.org/x/sys v0.0.0-20210309074719-68d13333faf2
+	golang.org/x/sys v0.0.0-20210906170528-6f6e22806c34
 	gopkg.in/yaml.v2 v2.4.0
 )
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/oschwald/maxminddb-golang v1.8.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/u-root/uio v0.0.0-20210528114334-82958018845c // indirect
+	golang.org/x/text v0.3.6 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c // indirect
+)

go.sum

@@ -1,20 +1,42 @@
-github.com/Dreamacro/go-shadowsocks2 v0.1.6 h1:PysSf9sLT3Qn8jhlin5v7Rk68gOQG4K5BZFY1nxLGxI=
+github.com/Dreamacro/go-shadowsocks2 v0.1.7 h1:8CtbE1HoPPMfrQZGXmlluq6dO2lL31W6WRRE8fabc4Q=
-github.com/Dreamacro/go-shadowsocks2 v0.1.6/go.mod h1:LSXCjyHesPY3pLjhwff1mQX72ItcBT/N2xNC685cYeU=
+github.com/Dreamacro/go-shadowsocks2 v0.1.7/go.mod h1:8p5G4cAj5ZlXwUR+Ww63gfSikr8kvw8uw3TDwLAJpUc=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/go-chi/chi v4.1.2+incompatible h1:fGFk2Gmi/YKXk0OmGfBh0WgmN3XB8lVnEyNz34tQRec=
+github.com/fanliao/go-promise v0.0.0-20141029170127-1890db352a72/go.mod h1:PjfxuH4FZdUyfMdtBio2lsRr1AKEaVPwelzuHuh8Lqc=
-github.com/go-chi/chi v4.1.2+incompatible/go.mod h1:eB3wogJHnLi3x/kFX2A+IbTBlXxmMeXJVKy9tTv1XzQ=
+github.com/go-chi/chi/v5 v5.0.4 h1:5e494iHzsYBiyXQAHHuI4tyJS9M3V84OuX3ufIIGHFo=
-github.com/go-chi/cors v1.1.1 h1:eHuqxsIw89iXcWnWUN8R72JMibABJTN/4IOYI5WERvw=
+github.com/go-chi/chi/v5 v5.0.4/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=
-github.com/go-chi/cors v1.1.1/go.mod h1:K2Yje0VW/SJzxiyMYu6iPQYa7hMjQX2i/F491VChg1I=
+github.com/go-chi/cors v1.2.0 h1:tV1g1XENQ8ku4Bq3K9ub2AtgG+p16SmzeMSGTwrOKdE=
+github.com/go-chi/cors v1.2.0/go.mod h1:sSbTewc+6wYHBBCW7ytsFSn836hqM7JxpglAy2Vzc58=
 github.com/go-chi/render v1.0.1 h1:4/5tis2cKaNdnv9zFLfXzcquC9HbeZgCnxGnKrltBS8=
 github.com/go-chi/render v1.0.1/go.mod h1:pq4Rr7HbnsdaeHagklXub+p6Wd16Af5l9koip1OvJns=
 github.com/gofrs/uuid v4.0.0+incompatible h1:1SD/1F5pU8p29ybwgQSwpQk+mwdRrXCYuPhW6m+TnJw=
 github.com/gofrs/uuid v4.0.0+incompatible/go.mod h1:b2aQJv3Z4Fp6yNu3cdSllBxTCLRxnplIgP/c0N/04lM=
+github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
+github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
 github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
 github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
-github.com/miekg/dns v1.1.40 h1:pyyPFfGMnciYUk/mXpKkVmeMQjfXqt3FAJ2hy7tPiLA=
+github.com/hugelgupf/socketpair v0.0.0-20190730060125-05d35a94e714/go.mod h1:2Goc3h8EklBH5mspfHFxBnEoURQCGzQQH1ga9Myjvis=
-github.com/miekg/dns v1.1.40/go.mod h1:KNUDUusw/aVsxyTYZM1oqvCicbwhgbNgztCETuNZ7xM=
+github.com/insomniacslk/dhcp v0.0.0-20210827173440-b95caade3eac h1:IO6EfdRnPhxgKOsk9DbewdtQZHKZKnGlW7QCUttvNys=
+github.com/insomniacslk/dhcp v0.0.0-20210827173440-b95caade3eac/go.mod h1:h+MxyHxRg9NH3terB1nfRIUaQEcI0XOVkdR9LNBlp8E=
+github.com/jsimonetti/rtnetlink v0.0.0-20190606172950-9527aa82566a/go.mod h1:Oz+70psSo5OFh8DBl0Zv2ACw7Esh6pPUphlvZG9x7uw=
+github.com/jsimonetti/rtnetlink v0.0.0-20200117123717-f846d4f6c1f4/go.mod h1:WGuG/smIU4J/54PblvSbh+xvCZmpJnFgr3ds6Z55XMQ=
+github.com/jsimonetti/rtnetlink v0.0.0-20201009170750-9c6f07d100c1/go.mod h1:hqoO/u39cqLeBLebZ8fWdE96O7FxrAsRYhnVOdgHxok=
+github.com/jsimonetti/rtnetlink v0.0.0-20201110080708-d2c240429e6c/go.mod h1:huN4d1phzjhlOsNIjFsw2SVRbwIHj3fJDMEU2SDPTmg=
+github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
+github.com/mdlayher/ethernet v0.0.0-20190606142754-0394541c37b7/go.mod h1:U6ZQobyTjI/tJyq2HG+i/dfSoFUt8/aZCM+GKtmFk/Y=
+github.com/mdlayher/netlink v0.0.0-20190409211403-11939a169225/go.mod h1:eQB3mZE4aiYnlUsyGGCOpPETfdQq4Jhsgf1fk3cwQaA=
+github.com/mdlayher/netlink v1.0.0/go.mod h1:KxeJAFOFLG6AjpyDkQ/iIhxygIUKD+vcwqcnu43w/+M=
+github.com/mdlayher/netlink v1.1.0/go.mod h1:H4WCitaheIsdF9yOYu8CFmCgQthAPIWZmcKp9uZHgmY=
+github.com/mdlayher/netlink v1.1.1/go.mod h1:WTYpFb/WTvlRJAyKhZL5/uy69TDDpHHu2VZmb2XgV7o=
+github.com/mdlayher/raw v0.0.0-20190606142536-fef19f00fc18/go.mod h1:7EpbotpCmVZcu+KCX4g9WaRNuu11uyhiW7+Le1dKawg=
+github.com/mdlayher/raw v0.0.0-20191009151244-50f2db8cc065/go.mod h1:7EpbotpCmVZcu+KCX4g9WaRNuu11uyhiW7+Le1dKawg=
+github.com/miekg/dns v1.1.43 h1:JKfpVSCB84vrAmHzyrsxB5NAr5kLoMXZArPSw7Qlgyg=
+github.com/miekg/dns v1.1.43/go.mod h1:+evo5L0630/F6ca/Z9+GAqzhjGyn8/c+TBaOyfEl0V4=
 github.com/oschwald/geoip2-golang v1.5.0 h1:igg2yQIrrcRccB1ytFXqBfOHCjXWIoMv85lVJ1ONZzw=
 github.com/oschwald/geoip2-golang v1.5.0/go.mod h1:xdvYt5xQzB8ORWFqPnqMwZpCpgNagttWdoZLlJQzg7s=
 github.com/oschwald/maxminddb-golang v1.8.0 h1:Uh/DSnGoxsyp/KYbY1AuP0tYEwfs0sCph9p/UMXK/Hk=
@@ -23,44 +45,66 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
 github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
+github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
+github.com/smartystreets/goconvey v1.6.4/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-go.uber.org/atomic v1.7.0 h1:ADUqmZGgLDDfbSL9ZmPxKTybcoEYHgpYfELNoN+7hsw=
+github.com/u-root/uio v0.0.0-20210528114334-82958018845c h1:BFvcl34IGnw8yvJi8hlqLFo9EshRInwWBs2M5fGWzQA=
-go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
+github.com/u-root/uio v0.0.0-20210528114334-82958018845c/go.mod h1:LpEX5FO/cB+WF4TYGY1V5qktpaZLkKkSegbr0V4eYXA=
+go.uber.org/atomic v1.9.0 h1:ECmE8Bn/WFTYwEW/bpKD3M8VtR/zQVbavAoalC1PYyE=
+go.uber.org/atomic v1.9.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/crypto v0.0.0-20191206172530-e9b2fee46413/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20210317152858-513c2a44f670/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
-golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83 h1:/ZScEX8SfEmUGRHs0gxpqteO5nfNW6axyZbBdw9A12g=
+golang.org/x/crypto v0.0.0-20210817164053-32db794688a5 h1:HWj/xjIHfjYU5nVXpTM0s39J9CbLn7Cc5a7IC5rwsMQ=
-golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
+golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
+golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20190419010253-1f3472d942ba/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20190923162816-aa69164e4478/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
-golang.org/x/net v0.0.0-20210226172049-e18ecbb05110 h1:qWPm9rbaAMKs8Bq/9LRpbMqxWRVUAQwMI9fVrssnTfw=
+golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20191007182048-72f939374954/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20201010224723-4f7140c49acb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
+golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/net v0.0.0-20210903162142-ad29c8ab022f h1:w6wWR0H+nyVpbSAQbzVEIACVyr/h8l/BEkY6Sokc7Eg=
+golang.org/x/net v0.0.0-20210903162142-ad29c8ab022f/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190411185658-b44545bcd369/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190924154521-2837fb4f24fe/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190418153312-f0ce4c0180be/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190606122018-79a91cf218c4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190826190057-c7b8b68b1456/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191008105621-543471e840be/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191224085550-c709ea063b76/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201009025420-dfb3f7c4e634/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201101102859-da207088b7d1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210309074719-68d13333faf2 h1:46ULzRKLh1CwgRq2dC5SlBzEqqNCi8rreOZnNrbqcIY=
+golang.org/x/sys v0.0.0-20210303074136-134d130e1a04/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210309074719-68d13333faf2/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
+golang.org/x/sys v0.0.0-20210525143221-35b2ab0089ea/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210906170528-6f6e22806c34 h1:GkvMjFtXUmahfDtashnc1mnrCtuBVcwse5QV2lUk/tI=
+golang.org/x/sys v0.0.0-20210906170528-6f6e22806c34/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.0.0-20191216052735-49a3e744a425/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
+golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
-golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=

hub/executor/executor.go

@@ -6,21 +6,22 @@ import (
 	"os"
 	"sync"
 
-	"github.com/Dreamacro/clash/adapters/outbound"
+	"github.com/Dreamacro/clash/adapter"
-	"github.com/Dreamacro/clash/adapters/outboundgroup"
+	"github.com/Dreamacro/clash/adapter/outboundgroup"
-	"github.com/Dreamacro/clash/adapters/provider"
 	"github.com/Dreamacro/clash/component/auth"
 	"github.com/Dreamacro/clash/component/dialer"
+	"github.com/Dreamacro/clash/component/iface"
 	"github.com/Dreamacro/clash/component/profile"
 	"github.com/Dreamacro/clash/component/profile/cachefile"
 	"github.com/Dreamacro/clash/component/resolver"
 	"github.com/Dreamacro/clash/component/trie"
 	"github.com/Dreamacro/clash/config"
 	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/constant/provider"
 	"github.com/Dreamacro/clash/dns"
+	P "github.com/Dreamacro/clash/listener"
+	authStore "github.com/Dreamacro/clash/listener/auth"
 	"github.com/Dreamacro/clash/log"
-	P "github.com/Dreamacro/clash/proxy"
-	authStore "github.com/Dreamacro/clash/proxy/auth"
 	"github.com/Dreamacro/clash/tunnel"
 )
 
@@ -70,13 +71,13 @@ func ApplyConfig(cfg *config.Config, force bool) {
 	defer mux.Unlock()
 
 	updateUsers(cfg.Users)
-	updateGeneral(cfg.General, force)
 	updateProxies(cfg.Proxies, cfg.Providers)
 	updateRules(cfg.Rules)
-	updateDNS(cfg.DNS)
 	updateHosts(cfg.Hosts)
-	updateExperimental(cfg)
 	updateProfile(cfg)
+	updateGeneral(cfg.General, force)
+	updateDNS(cfg.DNS)
+	updateExperimental(cfg)
 }
 
 func GetGeneral() *config.General {
@@ -123,11 +124,13 @@ func updateDNS(c *config.DNS) {
 		Pool:         c.FakeIPRange,
 		Hosts:        c.Hosts,
 		FallbackFilter: dns.FallbackFilter{
-			GeoIP:  c.FallbackFilter.GeoIP,
+			GeoIP:     c.FallbackFilter.GeoIP,
-			IPCIDR: c.FallbackFilter.IPCIDR,
+			GeoIPCode: c.FallbackFilter.GeoIPCode,
-			Domain: c.FallbackFilter.Domain,
+			IPCIDR:    c.FallbackFilter.IPCIDR,
+			Domain:    c.FallbackFilter.Domain,
 		},
 		Default: c.DefaultNameserver,
+		Policy:  c.NameServerPolicy,
 	}
 
 	r := dns.NewResolver(cfg)
@@ -169,13 +172,13 @@ func updateGeneral(general *config.General, force bool) {
 	resolver.DisableIPv6 = !general.IPv6
 
 	if general.Interface != "" {
-		dialer.DialHook = dialer.DialerWithInterface(general.Interface)
+		dialer.DefaultOptions = []dialer.Option{dialer.WithInterface(general.Interface)}
-		dialer.ListenPacketHook = dialer.ListenPacketWithInterface(general.Interface)
 	} else {
-		dialer.DialHook = nil
+		dialer.DefaultOptions = nil
-		dialer.ListenPacketHook = nil
 	}
 
+	iface.FlushCache()
+
 	if !force {
 		return
 	}
@@ -186,24 +189,27 @@ func updateGeneral(general *config.General, force bool) {
 	bindAddress := general.BindAddress
 	P.SetBindAddress(bindAddress)
 
-	if err := P.ReCreateHTTP(general.Port); err != nil {
+	tcpIn := tunnel.TCPIn()
+	udpIn := tunnel.UDPIn()
+
+	if err := P.ReCreateHTTP(general.Port, tcpIn); err != nil {
 		log.Errorln("Start HTTP server error: %s", err.Error())
 	}
 
-	if err := P.ReCreateSocks(general.SocksPort); err != nil {
+	if err := P.ReCreateSocks(general.SocksPort, tcpIn, udpIn); err != nil {
-		log.Errorln("Start SOCKS5 server error: %s", err.Error())
+		log.Errorln("Start SOCKS server error: %s", err.Error())
 	}
 
-	if err := P.ReCreateRedir(general.RedirPort); err != nil {
+	if err := P.ReCreateRedir(general.RedirPort, tcpIn, udpIn); err != nil {
 		log.Errorln("Start Redir server error: %s", err.Error())
 	}
 
-	if err := P.ReCreateTProxy(general.TProxyPort); err != nil {
+	if err := P.ReCreateTProxy(general.TProxyPort, tcpIn, udpIn); err != nil {
 		log.Errorln("Start TProxy server error: %s", err.Error())
 	}
 
-	if err := P.ReCreateMixed(general.MixedPort); err != nil {
+	if err := P.ReCreateMixed(general.MixedPort, tcpIn, udpIn); err != nil {
-		log.Errorln("Start Mixed(http and socks5) server error: %s", err.Error())
+		log.Errorln("Start Mixed(http and socks) server error: %s", err.Error())
 	}
 }
 
@@ -231,7 +237,7 @@ func patchSelectGroup(proxies map[string]C.Proxy) {
 	}
 
 	for name, proxy := range proxies {
-		outbound, ok := proxy.(*outbound.Proxy)
+		outbound, ok := proxy.(*adapter.Proxy)
 		if !ok {
 			continue
 		}

hub/route/common.go

@@ -4,7 +4,7 @@ import (
 	"net/http"
 	"net/url"
 
-	"github.com/go-chi/chi"
+	"github.com/go-chi/chi/v5"
 )
 
 // When name is composed of a partial escape string, Golang does not unescape it

hub/route/configs.go

@@ -6,12 +6,13 @@ import (
 
 	"github.com/Dreamacro/clash/component/resolver"
 	"github.com/Dreamacro/clash/config"
+	"github.com/Dreamacro/clash/constant"
 	"github.com/Dreamacro/clash/hub/executor"
+	P "github.com/Dreamacro/clash/listener"
 	"github.com/Dreamacro/clash/log"
-	P "github.com/Dreamacro/clash/proxy"
 	"github.com/Dreamacro/clash/tunnel"
 
-	"github.com/go-chi/chi"
+	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/render"
 )
 
@@ -66,11 +67,15 @@ func patchConfigs(w http.ResponseWriter, r *http.Request) {
 	}
 
 	ports := P.GetPorts()
-	P.ReCreateHTTP(pointerOrDefault(general.Port, ports.Port))
+
-	P.ReCreateSocks(pointerOrDefault(general.SocksPort, ports.SocksPort))
+	tcpIn := tunnel.TCPIn()
-	P.ReCreateRedir(pointerOrDefault(general.RedirPort, ports.RedirPort))
+	udpIn := tunnel.UDPIn()
-	P.ReCreateTProxy(pointerOrDefault(general.TProxyPort, ports.TProxyPort))
+
-	P.ReCreateMixed(pointerOrDefault(general.MixedPort, ports.MixedPort))
+	P.ReCreateHTTP(pointerOrDefault(general.Port, ports.Port), tcpIn)
+	P.ReCreateSocks(pointerOrDefault(general.SocksPort, ports.SocksPort), tcpIn, udpIn)
+	P.ReCreateRedir(pointerOrDefault(general.RedirPort, ports.RedirPort), tcpIn, udpIn)
+	P.ReCreateTProxy(pointerOrDefault(general.TProxyPort, ports.TProxyPort), tcpIn, udpIn)
+	P.ReCreateMixed(pointerOrDefault(general.MixedPort, ports.MixedPort), tcpIn, udpIn)
 
 	if general.Mode != nil {
 		tunnel.SetMode(*general.Mode)
@@ -112,6 +117,9 @@ func updateConfigs(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 	} else {
+		if req.Path == "" {
+			req.Path = constant.Path.Config()
+		}
 		if !filepath.IsAbs(req.Path) {
 			render.Status(r, http.StatusBadRequest)
 			render.JSON(w, r, newError("path is not a absolute path"))

hub/route/connections.go

@@ -8,10 +8,10 @@ import (
 	"time"
 
 	"github.com/Dreamacro/clash/tunnel/statistic"
-	"github.com/gorilla/websocket"
 
-	"github.com/go-chi/chi"
+	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/render"
+	"github.com/gorilla/websocket"
 )
 
 func connectionRouter() http.Handler {

hub/route/provider.go

@@ -4,10 +4,10 @@ import (
 	"context"
 	"net/http"
 
-	"github.com/Dreamacro/clash/adapters/provider"
+	"github.com/Dreamacro/clash/constant/provider"
 	"github.com/Dreamacro/clash/tunnel"
 
-	"github.com/go-chi/chi"
+	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/render"
 )
 

hub/route/proxies.go

@@ -7,13 +7,13 @@ import (
 	"strconv"
 	"time"
 
-	"github.com/Dreamacro/clash/adapters/outbound"
+	"github.com/Dreamacro/clash/adapter"
-	"github.com/Dreamacro/clash/adapters/outboundgroup"
+	"github.com/Dreamacro/clash/adapter/outboundgroup"
 	"github.com/Dreamacro/clash/component/profile/cachefile"
 	C "github.com/Dreamacro/clash/constant"
 	"github.com/Dreamacro/clash/tunnel"
 
-	"github.com/go-chi/chi"
+	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/render"
 )
 
@@ -78,7 +78,7 @@ func updateProxy(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	proxy := r.Context().Value(CtxKeyProxy).(*outbound.Proxy)
+	proxy := r.Context().Value(CtxKeyProxy).(*adapter.Proxy)
 	selector, ok := proxy.ProxyAdapter.(*outboundgroup.Selector)
 	if !ok {
 		render.Status(r, http.StatusBadRequest)

hub/route/rules.go

@@ -5,7 +5,7 @@ import (
 
 	"github.com/Dreamacro/clash/tunnel"
 
-	"github.com/go-chi/chi"
+	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/render"
 )
 

hub/route/server.go

@@ -3,6 +3,7 @@ package route
 import (
 	"bytes"
 	"encoding/json"
+	"net"
 	"net/http"
 	"strings"
 	"time"
@@ -11,7 +12,7 @@ import (
 	"github.com/Dreamacro/clash/log"
 	"github.com/Dreamacro/clash/tunnel/statistic"
 
-	"github.com/go-chi/chi"
+	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/cors"
 	"github.com/go-chi/render"
 	"github.com/gorilla/websocket"
@@ -81,10 +82,15 @@ func Start(addr string, secret string) {
 		})
 	}
 
-	log.Infoln("RESTful API listening at: %s", addr)
+	l, err := net.Listen("tcp", addr)
-	err := http.ListenAndServe(addr, r)
 	if err != nil {
-		log.Errorln("External controller error: %s", err.Error())
+		log.Errorln("External controller listen error: %s", err)
+		return
+	}
+	serverAddr = l.Addr().String()
+	log.Infoln("RESTful API listening at: %s", serverAddr)
+	if err = http.Serve(l, r); err != nil {
+		log.Errorln("External controller serve error: %s", err)
 	}
 }
 

listener/http/client.go

@@ -0,0 +1,45 @@
+package http
+
+import (
+	"context"
+	"errors"
+	"net"
+	"net/http"
+	"time"
+
+	"github.com/Dreamacro/clash/adapter/inbound"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/transport/socks5"
+)
+
+func newClient(source net.Addr, in chan<- C.ConnContext) *http.Client {
+	return &http.Client{
+		Transport: &http.Transport{
+			// from http.DefaultTransport
+			MaxIdleConns:          100,
+			IdleConnTimeout:       90 * time.Second,
+			TLSHandshakeTimeout:   10 * time.Second,
+			ResponseHeaderTimeout: 10 * time.Second,
+			ExpectContinueTimeout: 1 * time.Second,
+			DialContext: func(context context.Context, network, address string) (net.Conn, error) {
+				if network != "tcp" && network != "tcp4" && network != "tcp6" {
+					return nil, errors.New("unsupported network " + network)
+				}
+
+				dstAddr := socks5.ParseAddr(address)
+				if dstAddr == nil {
+					return nil, socks5.ErrAddressNotSupported
+				}
+
+				left, right := net.Pipe()
+
+				in <- inbound.NewHTTP(dstAddr, source, right)
+
+				return left, nil
+			},
+		},
+		CheckRedirect: func(req *http.Request, via []*http.Request) error {
+			return http.ErrUseLastResponse
+		},
+	}
+}

listener/http/hack.go

@@ -0,0 +1,10 @@
+package http
+
+import (
+	"bufio"
+	"net/http"
+	_ "unsafe"
+)
+
+//go:linkname ReadRequest net/http.readRequest
+func ReadRequest(b *bufio.Reader) (req *http.Request, err error)

listener/http/proxy.go

@@ -0,0 +1,133 @@
+package http
+
+import (
+	"net"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/Dreamacro/clash/adapter/inbound"
+	"github.com/Dreamacro/clash/common/cache"
+	N "github.com/Dreamacro/clash/common/net"
+	C "github.com/Dreamacro/clash/constant"
+	authStore "github.com/Dreamacro/clash/listener/auth"
+	"github.com/Dreamacro/clash/log"
+)
+
+func HandleConn(c net.Conn, in chan<- C.ConnContext, cache *cache.Cache) {
+	client := newClient(c.RemoteAddr(), in)
+	defer client.CloseIdleConnections()
+
+	conn := N.NewBufferedConn(c)
+
+	keepAlive := true
+	trusted := cache == nil // disable authenticate if cache is nil
+
+	for keepAlive {
+		request, err := ReadRequest(conn.Reader())
+		if err != nil {
+			break
+		}
+
+		request.RemoteAddr = conn.RemoteAddr().String()
+
+		keepAlive = strings.TrimSpace(strings.ToLower(request.Header.Get("Proxy-Connection"))) == "keep-alive"
+
+		var resp *http.Response
+
+		if !trusted {
+			resp = authenticate(request, cache)
+
+			trusted = resp == nil
+		}
+
+		if trusted {
+			if request.Method == http.MethodConnect {
+				resp = responseWith(200)
+				resp.Status = "Connection established"
+				resp.ContentLength = -1
+
+				if resp.Write(conn) != nil {
+					break // close connection
+				}
+
+				in <- inbound.NewHTTPS(request, conn)
+
+				return // hijack connection
+			}
+
+			host := request.Header.Get("Host")
+			if host != "" {
+				request.Host = host
+			}
+
+			request.RequestURI = ""
+
+			removeHopByHopHeaders(request.Header)
+			removeExtraHTTPHostPort(request)
+
+			if request.URL.Scheme == "" || request.URL.Host == "" {
+				resp = responseWith(http.StatusBadRequest)
+			} else {
+				resp, err = client.Do(request)
+				if err != nil {
+					resp = responseWith(http.StatusBadGateway)
+				}
+			}
+
+			removeHopByHopHeaders(resp.Header)
+		}
+
+		if keepAlive {
+			resp.Header.Set("Proxy-Connection", "keep-alive")
+			resp.Header.Set("Connection", "keep-alive")
+			resp.Header.Set("Keep-Alive", "timeout=4")
+		}
+
+		resp.Close = !keepAlive
+
+		err = resp.Write(conn)
+		if err != nil {
+			break // close connection
+		}
+	}
+
+	conn.Close()
+}
+
+func authenticate(request *http.Request, cache *cache.Cache) *http.Response {
+	authenticator := authStore.Authenticator()
+	if authenticator != nil {
+		credential := parseBasicProxyAuthorization(request)
+		if credential == "" {
+			resp := responseWith(http.StatusProxyAuthRequired)
+			resp.Header.Set("Proxy-Authenticate", "Basic")
+			return resp
+		}
+
+		var authed interface{}
+		if authed = cache.Get(credential); authed == nil {
+			user, pass, err := decodeBasicProxyAuthorization(credential)
+			authed = err == nil && authenticator.Verify(user, pass)
+			cache.Put(credential, authed, time.Minute)
+		}
+		if !authed.(bool) {
+			log.Infoln("Auth failed from %s", request.RemoteAddr)
+
+			return responseWith(http.StatusForbidden)
+		}
+	}
+
+	return nil
+}
+
+func responseWith(statusCode int) *http.Response {
+	return &http.Response{
+		StatusCode: statusCode,
+		Status:     http.StatusText(statusCode),
+		Proto:      "HTTP/1.1",
+		ProtoMajor: 1,
+		ProtoMinor: 1,
+		Header:     http.Header{},
+	}
+}