Chore: update dependencies

supports relaying of all UDP traffic except the HTTP outbound.

.github/workflows/docker.yml

@@ -3,8 +3,7 @@ on:
   push:
     branches:
       - rm
-    tags:
-      - '*'
+
 jobs:
 
   build:
@@ -49,6 +48,8 @@ jobs:
           platforms: linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64
           push: true
           tags: 'dreamacro/clash:dev,ghcr.io/dreamacro/clash:dev'
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
 
       - name: Get all docker tags
         if: startsWith(github.ref, 'refs/tags/')
@@ -74,3 +75,5 @@ jobs:
           platforms: linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64
           push: true
           tags: ${{steps.tags.outputs.result}}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

.github/workflows/release.yml

@@ -17,10 +17,18 @@ jobs:
       - name: Check out code into the Go module directory
         uses: actions/checkout@v3
 
+      - name: Go cache paths
+        id: go-cache-paths
+        run: |
+          echo "::set-output name=go-build::$(go env GOCACHE)"
+          echo "::set-output name=go-mod::$(go env GOMODCACHE)"
+
       - name: Cache go module
         uses: actions/cache@v2
         with:
-          path: ~/go/pkg/mod
+          path: |
+            ${{ steps.go-cache-paths.outputs.go-mod }}
+            ${{ steps.go-cache-paths.outputs.go-build }}
           key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
           restore-keys: |
             ${{ runner.os }}-go-
@@ -29,10 +37,6 @@ jobs:
         run: |
           go test ./...
 
-      - name: SSH connection to Actions
-        uses: P3TERX/ssh2actions@v1.0.0
-        if: github.actor == github.repository_owner && contains(github.event.head_commit.message, '[ssh]')
-
       - name: Build
         #if: startsWith(github.ref, 'refs/tags/')
         env:
@@ -47,6 +51,7 @@ jobs:
 
       - name: Upload files to Artifacts
         uses: actions/upload-artifact@v2
+        if: startsWith(github.ref, 'refs/tags/') == false
         with:
           name: clash_${{ env.FILE_SHA }}${{ env.FILE_DATE }}
           path: |
@@ -58,19 +63,11 @@ jobs:
         with:
           files: bin/*
           draft: true
+          prerelease: true
+          generate_release_notes: true
 
       - name: Delete workflow runs
         uses: GitRML/delete-workflow-runs@main
         with:
           retain_days: 1
           keep_minimum_runs: 2
-
-      - name: Remove old Releases
-        uses: dev-drprasad/delete-older-releases@v0.2.0
-        if: startsWith(github.ref, 'refs/tags/') && !cancelled()
-        with:
-          keep_latest: 1
-          delete_tags: true
-          delete_tag_pattern: tun
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

Makefile

@@ -133,7 +133,11 @@ vet:
 	go test ./...
 
 lint:
-	golangci-lint run ./...
+	GOOS=darwin golangci-lint run ./...
+	GOOS=windows golangci-lint run ./...
+	GOOS=linux golangci-lint run ./...
+	GOOS=freebsd golangci-lint run ./...
+	GOOS=openbsd golangci-lint run ./...
 
 clean:
 	rm -rf $(BINDIR)/*

README.md

@@ -36,12 +36,51 @@
 Documentations are now moved to [GitHub Wiki](https://github.com/Dreamacro/clash/wiki).
 
 ## Advanced usage for this branch
+### General configuration
+```yaml
+sniffing: true # Sniff TLS SNI
+
+force-cert-verify: true # force verify TLS Certificate, prevent machine-in-the-middle attacks
+```
+
+### MITM configuration
+A root CA certificate is required, the 
+MITM proxy server will generate a CA certificate file and a CA private key file in your Clash home directory, you can use your own certificate replace it. 
+
+Need to install and trust the CA certificate on the client device, open this URL [http://mitm.clash/cert.crt](http://mitm.clash/cert.crt) by the web browser to install the CA certificate, the host name 'mitm.clash' was always been hijacked.
+
+NOTE: this feature cannot work on tls pinning
+
+WARNING: DO NOT USE THIS FEATURE TO BREAK LOCAL LAWS
+
+```yaml
+# Port of MITM proxy server on the local end
+mitm-port: 7894
+
+# Man-In-The-Middle attack
+mitm:
+  hosts: # use for others proxy type. E.g: TUN, socks
+    - +.example.com
+  rules: # rewrite rules
+    - '^https?://www\.example\.com/1 url reject' # The "reject" returns HTTP status code 404 with no content.
+    - '^https?://www\.example\.com/2 url reject-200' # The "reject-200" returns HTTP status code 200 with no content.
+    - '^https?://www\.example\.com/3 url reject-img' # The "reject-img" returns HTTP status code 200 with content of 1px png.
+    - '^https?://www\.example\.com/4 url reject-dict' # The "reject-dict" returns HTTP status code 200 with content of empty json object.
+    - '^https?://www\.example\.com/5 url reject-array' # The "reject-array" returns HTTP status code 200 with content of empty json array.
+    - '^https?://www\.example\.com/(6) url 302 https://www.example.com/new-$1'
+    - '^https?://www\.(example)\.com/7 url 307 https://www.$1.com/new-7'
+    - '^https?://www\.example\.com/8 url request-header (\r\n)User-Agent:.+(\r\n) request-header $1User-Agent: haha-wriohoh$2' # The "request-header" works for all the http headers not just one single header, so you can match two or more headers including CRLF in one regular expression.
+    - '^https?://www\.example\.com/9 url request-body "pos_2":\[.*\],"pos_3" request-body "pos_2":[{"xx": "xx"}],"pos_3"'
+    - '^https?://www\.example\.com/10 url response-header (\r\n)Tracecode:.+(\r\n) response-header $1Tracecode: 88888888888$2'
+    - '^https?://www\.example\.com/11 url response-body "errmsg":"ok" response-body "errmsg":"not-ok"'
+```
+
 ### DNS configuration
 Support resolve ip with a proxy tunnel.
 
 Support `geosite` with `fallback-filter`.
 
-Use curl -X POST controllerip:port/cache/fakeip/flush to flush persistence fakeip
+Use `curl -X POST controllerip:port/cache/fakeip/flush` to flush persistence fakeip
  ```yaml
  dns:
    enable: true
@@ -70,21 +109,62 @@ Use curl -X POST controllerip:port/cache/fakeip/flush to flush persistence fakei
  ```
 
 ### TUN configuration
-Supports macOS, Linux and Windows.
+Simply add the following to the main configuration:
+
+#### NOTE:
+> auto-route and auto-detect-interface only available on macOS, Windows and Linux, receive IPv4 traffic
 
-On Windows, you should download the [Wintun](https://www.wintun.net) driver and copy `wintun.dll` into the system32 directory.
 ```yaml
-# Enable the TUN listener
 tun:
   enable: true
-  stack: gvisor # System or gVisor
+  stack: system # or gvisor
   # device: tun://utun8 # or fd://xxx, it's optional
-  dns-hijack: 
-    - 0.0.0.0:53 # hijack all public
+  # dns-hijack:
+  #   - 8.8.8.8:53
+  #   - tcp://8.8.8.8:53
+  #   - any:53
+  #   - tcp://any:53
+  auto-route: true # auto set global route
+  auto-detect-interface: true # conflict with interface-name
+```
+or
+```yaml
+interface-name: en0
+
+tun:
+  enable: true
+  stack: system # or gvisor
+  # dns-hijack:
+  #   - 8.8.8.8:53
+  #   - tcp://8.8.8.8:53
   auto-route: true # auto set global route
 ```
+It's recommended to use fake-ip mode for the DNS server.
+
+Clash needs elevated permission to create TUN device:
+```sh
+$ sudo ./clash
+```
+Then manually create the default route and DNS server. If your device already has some TUN device, Clash TUN might not work. In this case, fake-ip-filter may helpful.
+
+Enjoy! :)
+
+#### For Windows:
+```yaml
+tun:
+  enable: true
+  stack: gvisor # or system
+  dns-hijack:
+    - 198.18.0.2:53 # when `fake-ip-range` is 198.18.0.1/16, should hijack 198.18.0.2:53
+  auto-route: true # auto set global route for Windows
+  # It is recommended to use `interface-name`
+  auto-detect-interface: true # auto detect interface, conflict with `interface-name`
+```
+Finally, open the Clash
+
 ### Rules configuration
 - Support rule `GEOSITE`.
+- Support rule `USER-AGENT`.
 - Support `multiport` condition for rule `SRC-PORT` and `DST-PORT`.
 - Support `network` condition for all rules.
 - Support `process` condition for all rules.
@@ -104,7 +184,10 @@ rules:
 
   # multiport condition for rules SRC-PORT and DST-PORT
   - DST-PORT,123/136/137-139,DIRECT,udp
-  
+
+  # USER-AGENT payload cannot include the comma character, '*' meaning any character.
+  - USER-AGENT,*example*,PROXY
+
   # rule GEOSITE
   - GEOSITE,category-ads-all,REJECT
   - GEOSITE,icloud@cn,DIRECT
@@ -131,6 +214,8 @@ Support outbound protocol `VLESS`.
 
 Support `Trojan` with XTLS.
 
+Support relay `UDP` traffic.
+
 Currently XTLS only supports TCP transport.
 ```yaml
 proxies:
@@ -168,6 +253,25 @@ proxies:
     # udp: true
     # sni: example.com # aka server name
     # skip-cert-verify: true
+
+proxy-groups:
+  # Relay chains the proxies. proxies shall not contain a relay.
+  # Support relay UDP traffic.
+  # Traffic: clash <-> ss1 <-> trojan <-> vmess <-> ss2 <-> Internet
+  - name: "relay-udp-over-tcp"
+    type: relay
+    proxies:
+      - ss1
+      - trojan
+      - vmess
+      - ss2
+
+  - name: "relay-raw-udp"
+    type: relay
+    proxies:
+      - ss1
+      - ss2
+      - ss3
 ```
 
 ### IPTABLES configuration
@@ -184,7 +288,7 @@ iptables:
 Run Clash as a daemon.
 
 Create the systemd configuration file at /etc/systemd/system/clash.service:
-```shell
+```sh
 [Unit]
 Description=Clash daemon, A rule-based proxy in Go.
 After=network.target
@@ -199,18 +303,34 @@ ExecStart=/usr/local/bin/clash -d /etc/clash
 WantedBy=multi-user.target
 ```
 Launch clashd on system startup with:
-```shell
+```sh
 $ systemctl enable clash
 ```
 Launch clashd immediately with:
-```shell
+```sh
 $ systemctl start clash
 ```
 
 ### Display Process name
-Add field `Process` to `Metadata` and prepare to get process name for Restful API `GET /connections`.
+To display process name online by click [http://yacd.clash-plus.cf](http://yacd.clash-plus.cf) for local API by Safari or [https://yacd.clash-plus.cf](https://yacd.clash-plus.cf) for local API by Chrome.
 
-To display process name in GUI please use https://yaling888.github.io/yacd/.
+You can download the [Dashboard](https://github.com/yaling888/yacd/archive/gh-pages.zip) into Clash home directory:
+```sh
+$ cd ~/.config/clash
+$ curl -LJ https://github.com/yaling888/yacd/archive/gh-pages.zip -o yacd-gh-pages.zip
+$ unzip yacd-gh-pages.zip
+$ mv yacd-gh-pages dashboard
+```
+
+Add to config file:
+```yaml
+external-controller: 127.0.0.1:9090
+external-ui: dashboard
+```
+Open [http://127.0.0.1:9090/ui/](http://127.0.0.1:9090/ui/) by web browser.
+
+## Plus Pro Release
+[Release](https://github.com/yaling888/clash/releases/tag/plus)
 
 ## Development
 If you want to build an application that uses clash as a library, check out the the [GitHub Wiki](https://github.com/Dreamacro/clash/wiki/use-clash-as-a-library)

adapter/adapter.go

@@ -6,8 +6,8 @@ import (
 	"fmt"
 	"net"
 	"net/http"
+	"net/netip"
 	"net/url"
-	"strings"
 	"time"
 
 	"github.com/Dreamacro/clash/common/queue"
@@ -19,7 +19,7 @@ import (
 
 type Proxy struct {
 	C.ProxyAdapter
-	history *queue.Queue
+	history *queue.Queue[C.DelayHistory]
 	alive   *atomic.Bool
 }
 
@@ -38,11 +38,7 @@ func (p *Proxy) Dial(metadata *C.Metadata) (C.Conn, error) {
 // DialContext implements C.ProxyAdapter
 func (p *Proxy) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
 	conn, err := p.ProxyAdapter.DialContext(ctx, metadata, opts...)
-	wasCancel := false
-	if err != nil {
-		wasCancel = strings.Contains(err.Error(), "operation was canceled")
-	}
-	p.alive.Store(err == nil || wasCancel)
+	p.alive.Store(err == nil)
 	return conn, err
 }
 
@@ -62,10 +58,10 @@ func (p *Proxy) ListenPacketContext(ctx context.Context, metadata *C.Metadata, o
 
 // DelayHistory implements C.Proxy
 func (p *Proxy) DelayHistory() []C.DelayHistory {
-	queue := p.history.Copy()
+	queueM := p.history.Copy()
 	histories := []C.DelayHistory{}
-	for _, item := range queue {
-		histories = append(histories, item.(C.DelayHistory))
+	for _, item := range queueM {
+		histories = append(histories, item)
 	}
 	return histories
 }
@@ -78,11 +74,7 @@ func (p *Proxy) LastDelay() (delay uint16) {
 		return max
 	}
 
-	last := p.history.Last()
-	if last == nil {
-		return max
-	}
-	history := last.(C.DelayHistory)
+	history := p.history.Last()
 	if history.Delay == 0 {
 		return max
 	}
@@ -97,7 +89,7 @@ func (p *Proxy) MarshalJSON() ([]byte, error) {
 	}
 
 	mapping := map[string]any{}
-	json.Unmarshal(inner, &mapping)
+	_ = json.Unmarshal(inner, &mapping)
 	mapping["history"] = p.DelayHistory()
 	mapping["name"] = p.Name()
 	mapping["udp"] = p.SupportUDP()
@@ -129,7 +121,9 @@ func (p *Proxy) URLTest(ctx context.Context, url string) (t uint16, err error) {
 	if err != nil {
 		return
 	}
-	defer instance.Close()
+	defer func() {
+		_ = instance.Close()
+	}()
 
 	req, err := http.NewRequest(http.MethodHead, url, nil)
 	if err != nil {
@@ -138,7 +132,7 @@ func (p *Proxy) URLTest(ctx context.Context, url string) (t uint16, err error) {
 	req = req.WithContext(ctx)
 
 	transport := &http.Transport{
-		Dial: func(string, string) (net.Conn, error) {
+		DialContext: func(context.Context, string, string) (net.Conn, error) {
 			return instance, nil
 		},
 		// from http.DefaultTransport
@@ -160,13 +154,13 @@ func (p *Proxy) URLTest(ctx context.Context, url string) (t uint16, err error) {
 	if err != nil {
 		return
 	}
-	resp.Body.Close()
+	_ = resp.Body.Close()
 	t = uint16(time.Since(start) / time.Millisecond)
 	return
 }
 
 func NewProxy(adapter C.ProxyAdapter) *Proxy {
-	return &Proxy{adapter, queue.New(10), atomic.NewBool(true)}
+	return &Proxy{adapter, queue.New[C.DelayHistory](10), atomic.NewBool(true)}
 }
 
 func urlToMetadata(rawURL string) (addr C.Metadata, err error) {
@@ -191,7 +185,7 @@ func urlToMetadata(rawURL string) (addr C.Metadata, err error) {
 	addr = C.Metadata{
 		AddrType: C.AtypDomainName,
 		Host:     u.Hostname(),
-		DstIP:    nil,
+		DstIP:    netip.Addr{},
 		DstPort:  port,
 	}
 	return

adapter/inbound/mitm.go

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

adapter/inbound/util.go

@@ -3,9 +3,11 @@ package inbound
 import (
 	"net"
 	"net/http"
+	"net/netip"
 	"strconv"
 	"strings"
 
+	"github.com/Dreamacro/clash/common/nnip"
 	C "github.com/Dreamacro/clash/constant"
 	"github.com/Dreamacro/clash/transport/socks5"
 )
@@ -21,12 +23,10 @@ func parseSocksAddr(target socks5.Addr) *C.Metadata {
 		metadata.Host = strings.TrimRight(string(target[2:2+target[1]]), ".")
 		metadata.DstPort = strconv.Itoa((int(target[2+target[1]]) << 8) | int(target[2+target[1]+1]))
 	case socks5.AtypIPv4:
-		ip := net.IP(target[1 : 1+net.IPv4len])
-		metadata.DstIP = ip
+		metadata.DstIP = nnip.IpToAddr(net.IP(target[1 : 1+net.IPv4len]))
 		metadata.DstPort = strconv.Itoa((int(target[1+net.IPv4len]) << 8) | int(target[1+net.IPv4len+1]))
 	case socks5.AtypIPv6:
-		ip := net.IP(target[1 : 1+net.IPv6len])
-		metadata.DstIP = ip
+		metadata.DstIP = nnip.IpToAddr(net.IP(target[1 : 1+net.IPv6len]))
 		metadata.DstPort = strconv.Itoa((int(target[1+net.IPv6len]) << 8) | int(target[1+net.IPv6len+1]))
 	}
 
@@ -47,14 +47,14 @@ func parseHTTPAddr(request *http.Request) *C.Metadata {
 		NetWork:  C.TCP,
 		AddrType: C.AtypDomainName,
 		Host:     host,
-		DstIP:    nil,
+		DstIP:    netip.Addr{},
 		DstPort:  port,
 	}
 
-	ip := net.ParseIP(host)
-	if ip != nil {
+	ip, err := netip.ParseAddr(host)
+	if err == nil {
 		switch {
-		case ip.To4() == nil:
+		case ip.Is6():
 			metadata.AddrType = C.AtypIPv6
 		default:
 			metadata.AddrType = C.AtypIPv4
@@ -65,12 +65,12 @@ func parseHTTPAddr(request *http.Request) *C.Metadata {
 	return metadata
 }
 
-func parseAddr(addr string) (net.IP, string, error) {
+func parseAddr(addr string) (netip.Addr, string, error) {
 	host, port, err := net.SplitHostPort(addr)
 	if err != nil {
-		return nil, "", err
+		return netip.Addr{}, "", err
 	}
 
-	ip := net.ParseIP(host)
-	return ip, port, nil
+	ip, err := netip.ParseAddr(host)
+	return ip, port, err
 }

adapter/outbound/base.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
+	"io"
 	"net"
 
 	"github.com/Dreamacro/clash/component/dialer"
@@ -30,12 +31,17 @@ func (b *Base) Type() C.AdapterType {
 }
 
 // StreamConn implements C.ProxyAdapter
-func (b *Base) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+func (b *Base) StreamConn(c net.Conn, _ *C.Metadata) (net.Conn, error) {
+	return c, errors.New("no support")
+}
+
+// StreamPacketConn implements C.ProxyAdapter
+func (b *Base) StreamPacketConn(c net.Conn, _ *C.Metadata) (net.Conn, error) {
 	return c, errors.New("no support")
 }
 
 // ListenPacketContext implements C.ProxyAdapter
-func (b *Base) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
+func (b *Base) ListenPacketContext(_ context.Context, _ *C.Metadata, _ ...dialer.Option) (C.PacketConn, error) {
 	return nil, errors.New("no support")
 }
 
@@ -57,7 +63,7 @@ func (b *Base) Addr() string {
 }
 
 // Unwrap implements C.ProxyAdapter
-func (b *Base) Unwrap(metadata *C.Metadata) C.Proxy {
+func (b *Base) Unwrap(_ *C.Metadata) C.Proxy {
 	return nil
 }
 
@@ -133,6 +139,40 @@ func (c *packetConn) AppendToChains(a C.ProxyAdapter) {
 	c.chain = append(c.chain, a.Name())
 }
 
-func newPacketConn(pc net.PacketConn, a C.ProxyAdapter) C.PacketConn {
+func NewPacketConn(pc net.PacketConn, a C.ProxyAdapter) C.PacketConn {
 	return &packetConn{pc, []string{a.Name()}}
 }
+
+type wrapConn struct {
+	net.PacketConn
+}
+
+func (*wrapConn) Read([]byte) (int, error) {
+	return 0, io.EOF
+}
+
+func (*wrapConn) Write([]byte) (int, error) {
+	return 0, io.EOF
+}
+
+func (*wrapConn) RemoteAddr() net.Addr {
+	return nil
+}
+
+func WrapConn(packetConn net.PacketConn) net.Conn {
+	return &wrapConn{
+		PacketConn: packetConn,
+	}
+}
+
+func IsPacketConn(c net.Conn) bool {
+	if _, ok := c.(net.PacketConn); !ok {
+		return false
+	}
+
+	if ua, ok := c.LocalAddr().(*net.UnixAddr); ok {
+		return ua.Net == "unixgram"
+	}
+
+	return true
+}

adapter/outbound/direct.go

@@ -3,6 +3,7 @@ package outbound
 import (
 	"context"
 	"net"
+	"net/netip"
 
 	"github.com/Dreamacro/clash/component/dialer"
 	C "github.com/Dreamacro/clash/constant"
@@ -19,18 +20,26 @@ func (d *Direct) DialContext(ctx context.Context, metadata *C.Metadata, opts ...
 	if err != nil {
 		return nil, err
 	}
+
 	tcpKeepAlive(c)
+
+	if !metadata.DstIP.IsValid() && c.RemoteAddr() != nil {
+		if h, _, err := net.SplitHostPort(c.RemoteAddr().String()); err == nil {
+			metadata.DstIP = netip.MustParseAddr(h)
+		}
+	}
+
 	return NewConn(c, d), nil
 }
 
 // ListenPacketContext implements C.ProxyAdapter
-func (d *Direct) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
+func (d *Direct) ListenPacketContext(ctx context.Context, _ *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
 	opts = append(opts, dialer.WithDirect())
 	pc, err := dialer.ListenPacket(ctx, "udp", "", d.Base.DialOptions(opts...)...)
 	if err != nil {
 		return nil, err
 	}
-	return newPacketConn(&directPacketConn{pc}, d), nil
+	return NewPacketConn(&directPacketConn{pc}, d), nil
 }
 
 type directPacketConn struct {

adapter/outbound/http.go

@@ -89,6 +89,10 @@ func (h *Http) shakeHand(metadata *C.Metadata, rw io.ReadWriter) error {
 		req.Header.Add("Proxy-Authorization", "Basic "+base64.StdEncoding.EncodeToString([]byte(auth)))
 	}
 
+	if metadata.Type == C.MITM {
+		req.Header.Set("Origin-Request-Source-Address", metadata.SourceAddress())
+	}
+
 	if err := req.Write(rw); err != nil {
 		return err
 	}

adapter/outbound/mitm.go

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

adapter/outbound/reject.go

@@ -6,22 +6,49 @@ import (
 	"net"
 	"time"
 
+	"github.com/Dreamacro/clash/common/cache"
 	"github.com/Dreamacro/clash/component/dialer"
 	C "github.com/Dreamacro/clash/constant"
 )
 
+const (
+	rejectCountLimit = 50
+	rejectDelay      = time.Second * 35
+)
+
+var rejectCounter = cache.NewLRUCache[string, int](cache.WithAge[string, int](15), cache.WithStale[string, int](false), cache.WithSize[string, int](512))
+
 type Reject struct {
 	*Base
 }
 
 // DialContext implements C.ProxyAdapter
 func (r *Reject) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
+	key := metadata.RemoteAddress()
+
+	count, existed := rejectCounter.Get(key)
+	if !existed {
+		count = 0
+	}
+
+	count = count + 1
+
+	rejectCounter.Set(key, count)
+
+	if count > rejectCountLimit {
+		c, _ := net.Pipe()
+
+		_ = c.SetDeadline(time.Now().Add(rejectDelay))
+
+		return NewConn(c, r), nil
+	}
+
 	return NewConn(&nopConn{}, r), nil
 }
 
 // ListenPacketContext implements C.ProxyAdapter
 func (r *Reject) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
-	return newPacketConn(&nopPacketConn{}, r), nil
+	return NewPacketConn(&nopPacketConn{}, r), nil
 }
 
 func NewReject() *Reject {

adapter/outbound/shadowsocks.go

@@ -74,6 +74,21 @@ func (ss *ShadowSocks) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, e
 	return c, err
 }
 
+// StreamPacketConn implements C.ProxyAdapter
+func (ss *ShadowSocks) StreamPacketConn(c net.Conn, _ *C.Metadata) (net.Conn, error) {
+	if !IsPacketConn(c) {
+		return c, fmt.Errorf("%s connect error: can not convert net.Conn to net.PacketConn", ss.addr)
+	}
+
+	addr, err := resolveUDPAddr("udp", ss.addr)
+	if err != nil {
+		return c, err
+	}
+
+	pc := ss.cipher.PacketConn(c.(net.PacketConn))
+	return WrapConn(&ssPacketConn{PacketConn: pc, rAddr: addr}), nil
+}
+
 // DialContext implements C.ProxyAdapter
 func (ss *ShadowSocks) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
 	c, err := dialer.DialContext(ctx, "tcp", ss.addr, ss.Base.DialOptions(opts...)...)
@@ -95,14 +110,13 @@ func (ss *ShadowSocks) ListenPacketContext(ctx context.Context, metadata *C.Meta
 		return nil, err
 	}
 
-	addr, err := resolveUDPAddr("udp", ss.addr)
+	c, err := ss.StreamPacketConn(WrapConn(pc), metadata)
 	if err != nil {
-		pc.Close()
+		_ = pc.Close()
 		return nil, err
 	}
 
-	pc = ss.cipher.PacketConn(pc)
-	return newPacketConn(&ssPacketConn{PacketConn: pc, rAddr: addr}, ss), nil
+	return NewPacketConn(c.(net.PacketConn), ss), nil
 }
 
 func NewShadowSocks(option ShadowSocksOption) (*ShadowSocks, error) {

adapter/outbound/shadowsocksr.go

@@ -59,6 +59,22 @@ func (ssr *ShadowSocksR) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn,
 	return c, err
 }
 
+// StreamPacketConn implements C.ProxyAdapter
+func (ssr *ShadowSocksR) StreamPacketConn(c net.Conn, _ *C.Metadata) (net.Conn, error) {
+	if !IsPacketConn(c) {
+		return c, fmt.Errorf("%s connect error: can not convert net.Conn to net.PacketConn", ssr.addr)
+	}
+
+	addr, err := resolveUDPAddr("udp", ssr.addr)
+	if err != nil {
+		return c, err
+	}
+
+	pc := ssr.cipher.PacketConn(c.(net.PacketConn))
+	pc = ssr.protocol.PacketConn(pc)
+	return WrapConn(&ssPacketConn{PacketConn: pc, rAddr: addr}), nil
+}
+
 // DialContext implements C.ProxyAdapter
 func (ssr *ShadowSocksR) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
 	c, err := dialer.DialContext(ctx, "tcp", ssr.addr, ssr.Base.DialOptions(opts...)...)
@@ -80,18 +96,22 @@ func (ssr *ShadowSocksR) ListenPacketContext(ctx context.Context, metadata *C.Me
 		return nil, err
 	}
 
-	addr, err := resolveUDPAddr("udp", ssr.addr)
+	c, err := ssr.StreamPacketConn(WrapConn(pc), metadata)
 	if err != nil {
-		pc.Close()
+		_ = pc.Close()
 		return nil, err
 	}
 
-	pc = ssr.cipher.PacketConn(pc)
-	pc = ssr.protocol.PacketConn(pc)
-	return newPacketConn(&ssPacketConn{PacketConn: pc, rAddr: addr}, ssr), nil
+	return NewPacketConn(c.(net.PacketConn), ssr), nil
 }
 
 func NewShadowSocksR(option ShadowSocksROption) (*ShadowSocksR, error) {
+	// SSR protocol compatibility
+	// https://github.com/Dreamacro/clash/pull/2056
+	if option.Cipher == "none" {
+		option.Cipher = "dummy"
+	}
+
 	addr := net.JoinHostPort(option.Server, strconv.Itoa(option.Port))
 	cipher := option.Cipher
 	password := option.Password
@@ -103,13 +123,14 @@ func NewShadowSocksR(option ShadowSocksROption) (*ShadowSocksR, error) {
 		ivSize int
 		key    []byte
 	)
+
 	if option.Cipher == "dummy" {
 		ivSize = 0
 		key = core.Kdf(option.Password, 16)
 	} else {
 		ciph, ok := coreCiph.(*core.StreamCipher)
 		if !ok {
-			return nil, fmt.Errorf("%s is not dummy or a supported stream cipher in ssr", cipher)
+			return nil, fmt.Errorf("%s is not none or a supported stream cipher in ssr", cipher)
 		}
 		ivSize = ciph.IVSize()
 		key = ciph.Key

adapter/outbound/snell.go

@@ -58,6 +58,18 @@ func (s *Snell) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 	return c, err
 }
 
+// StreamPacketConn implements C.ProxyAdapter
+func (s *Snell) StreamPacketConn(c net.Conn, _ *C.Metadata) (net.Conn, error) {
+	c = streamConn(c, streamOption{s.psk, s.version, s.addr, s.obfsOption})
+
+	err := snell.WriteUDPHeader(c, s.version)
+	if err != nil {
+		return c, err
+	}
+
+	return WrapConn(snell.PacketConn(c)), nil
+}
+
 // DialContext implements C.ProxyAdapter
 func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
 	if s.version == snell.Version2 && len(opts) == 0 {
@@ -68,7 +80,7 @@ func (s *Snell) DialContext(ctx context.Context, metadata *C.Metadata, opts ...d
 
 		port, _ := strconv.ParseUint(metadata.DstPort, 10, 16)
 		if err = snell.WriteHeader(c, metadata.String(), uint(port), s.version); err != nil {
-			c.Close()
+			_ = c.Close()
 			return nil, err
 		}
 		return NewConn(c, s), err
@@ -93,15 +105,14 @@ func (s *Snell) ListenPacketContext(ctx context.Context, metadata *C.Metadata, o
 		return nil, err
 	}
 	tcpKeepAlive(c)
-	c = streamConn(c, streamOption{s.psk, s.version, s.addr, s.obfsOption})
 
-	err = snell.WriteUDPHeader(c, s.version)
+	pc, err := s.StreamPacketConn(c, metadata)
 	if err != nil {
+		_ = c.Close()
 		return nil, err
 	}
 
-	pc := snell.PacketConn(c)
-	return newPacketConn(pc, s), nil
+	return NewPacketConn(pc.(net.PacketConn), s), nil
 }
 
 func NewSnell(option SnellOption) (*Snell, error) {

adapter/outbound/socks5.go

@@ -37,12 +37,59 @@ type Socks5Option struct {
 
 // StreamConn implements C.ProxyAdapter
 func (ss *Socks5) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+	var err error
+	c, _, err = ss.streamConn(c, metadata)
+
+	return c, err
+}
+
+func (ss *Socks5) StreamSocks5PacketConn(c net.Conn, pc net.PacketConn, metadata *C.Metadata) (net.PacketConn, error) {
+	if c == nil {
+		return pc, fmt.Errorf("%s connect error: parameter net.Conn is nil", ss.addr)
+	}
+
+	if pc == nil {
+		return pc, fmt.Errorf("%s connect error: parameter net.PacketConn is nil", ss.addr)
+	}
+
+	cc, bindAddr, err := ss.streamConn(c, metadata)
+	if err != nil {
+		return pc, err
+	}
+
+	c = cc
+
+	go func() {
+		_, _ = io.Copy(io.Discard, c)
+		_ = c.Close()
+		// A UDP association terminates when the TCP connection that the UDP
+		// ASSOCIATE request arrived on terminates. RFC1928
+		_ = pc.Close()
+	}()
+
+	// Support unspecified UDP bind address.
+	bindUDPAddr := bindAddr.UDPAddr()
+	if bindUDPAddr == nil {
+		return pc, errors.New("invalid UDP bind address")
+	} else if bindUDPAddr.IP.IsUnspecified() {
+		serverAddr, err := resolveUDPAddr("udp", ss.Addr())
+		if err != nil {
+			return pc, err
+		}
+
+		bindUDPAddr.IP = serverAddr.IP
+	}
+
+	return &socksPacketConn{PacketConn: pc, rAddr: bindUDPAddr, tcpConn: c}, nil
+}
+
+func (ss *Socks5) streamConn(c net.Conn, metadata *C.Metadata) (_ net.Conn, bindAddr socks5.Addr, err error) {
 	if ss.tls {
 		cc := tls.Client(c, ss.tlsConfig)
 		err := cc.Handshake()
 		c = cc
 		if err != nil {
-			return nil, fmt.Errorf("%s connect error: %w", ss.addr, err)
+			return c, nil, fmt.Errorf("%s connect error: %w", ss.addr, err)
 		}
 	}
 
@@ -53,10 +100,14 @@ func (ss *Socks5) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error)
 			Password: ss.pass,
 		}
 	}
-	if _, err := socks5.ClientHandshake(c, serializesSocksAddr(metadata), socks5.CmdConnect, user); err != nil {
-		return nil, err
+
+	if metadata.NetWork == C.UDP {
+		bindAddr, err = socks5.ClientHandshake(c, serializesSocksAddr(metadata), socks5.CmdUDPAssociate, user)
+	} else {
+		bindAddr, err = socks5.ClientHandshake(c, serializesSocksAddr(metadata), socks5.CmdConnect, user)
 	}
-	return c, nil
+
+	return c, bindAddr, err
 }
 
 // DialContext implements C.ProxyAdapter
@@ -81,61 +132,24 @@ func (ss *Socks5) DialContext(ctx context.Context, metadata *C.Metadata, opts ..
 func (ss *Socks5) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
 	c, err := dialer.DialContext(ctx, "tcp", ss.addr, ss.Base.DialOptions(opts...)...)
 	if err != nil {
-		err = fmt.Errorf("%s connect error: %w", ss.addr, err)
-		return
-	}
-
-	if ss.tls {
-		cc := tls.Client(c, ss.tlsConfig)
-		err = cc.Handshake()
-		c = cc
+		return nil, fmt.Errorf("%s connect error: %w", ss.addr, err)
 	}
 
 	defer safeConnClose(c, err)
 
-	tcpKeepAlive(c)
-	var user *socks5.User
-	if ss.user != "" {
-		user = &socks5.User{
-			Username: ss.user,
-			Password: ss.pass,
-		}
-	}
-
-	bindAddr, err := socks5.ClientHandshake(c, serializesSocksAddr(metadata), socks5.CmdUDPAssociate, user)
-	if err != nil {
-		err = fmt.Errorf("client hanshake error: %w", err)
-		return
-	}
-
 	pc, err := dialer.ListenPacket(ctx, "udp", "", ss.Base.DialOptions(opts...)...)
 	if err != nil {
 		return
 	}
 
-	go func() {
-		io.Copy(io.Discard, c)
-		c.Close()
-		// A UDP association terminates when the TCP connection that the UDP
-		// ASSOCIATE request arrived on terminates. RFC1928
-		pc.Close()
-	}()
+	tcpKeepAlive(c)
 
-	// Support unspecified UDP bind address.
-	bindUDPAddr := bindAddr.UDPAddr()
-	if bindUDPAddr == nil {
-		err = errors.New("invalid UDP bind address")
+	pc, err = ss.StreamSocks5PacketConn(c, pc, metadata)
+	if err != nil {
 		return
-	} else if bindUDPAddr.IP.IsUnspecified() {
-		serverAddr, err := resolveUDPAddr("udp", ss.Addr())
-		if err != nil {
-			return nil, err
-		}
-
-		bindUDPAddr.IP = serverAddr.IP
 	}
 
-	return newPacketConn(&socksPacketConn{PacketConn: pc, rAddr: bindUDPAddr, tcpConn: c}, ss), nil
+	return NewPacketConn(pc, ss), nil
 }
 
 func NewSocks5(option Socks5Option) *Socks5 {
@@ -199,6 +213,6 @@ func (uc *socksPacketConn) ReadFrom(b []byte) (int, net.Addr, error) {
 }
 
 func (uc *socksPacketConn) Close() error {
-	uc.tcpConn.Close()
+	_ = uc.tcpConn.Close()
 	return uc.PacketConn.Close()
 }

adapter/outbound/trojan.go

@@ -72,8 +72,7 @@ func (t *Trojan) plainStream(c net.Conn) (net.Conn, error) {
 	return t.instance.StreamConn(c)
 }
 
-// StreamConn implements C.ProxyAdapter
-func (t *Trojan) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+func (t *Trojan) trojanStream(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)
@@ -85,39 +84,63 @@ func (t *Trojan) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error)
 		return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
 	}
 
-	c, err = t.instance.PresetXTLSConn(c)
+	c, err = t.instance.PrepareXTLSConn(c)
 	if err != nil {
-		return nil, err
+		return c, err
+	}
+
+	if metadata.NetWork == C.UDP {
+		err = t.instance.WriteHeader(c, trojan.CommandUDP, serializesSocksAddr(metadata))
+		return c, err
 	}
 
 	err = t.instance.WriteHeader(c, trojan.CommandTCP, serializesSocksAddr(metadata))
 	return c, err
 }
 
+// StreamConn implements C.ProxyAdapter
+func (t *Trojan) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+	return t.trojanStream(c, metadata)
+}
+
+// StreamPacketConn implements C.ProxyAdapter
+func (t *Trojan) StreamPacketConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+	var err error
+	c, err = t.trojanStream(c, metadata)
+	if err != nil {
+		return c, err
+	}
+
+	pc := t.instance.PacketConn(c)
+	return WrapConn(pc), nil
+}
+
 // DialContext implements C.ProxyAdapter
 func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
+	var c net.Conn
+
 	// gun transport
 	if t.transport != nil && len(opts) == 0 {
-		c, err := gun.StreamGunWithTransport(t.transport, t.gunConfig)
+		c, err = gun.StreamGunWithTransport(t.transport, t.gunConfig)
 		if err != nil {
 			return nil, err
 		}
 
-		c, err = t.instance.PresetXTLSConn(c)
+		defer safeConnClose(c, err)
+
+		c, err = t.instance.PrepareXTLSConn(c)
 		if err != nil {
-			c.Close()
 			return nil, err
 		}
 
 		if err = t.instance.WriteHeader(c, trojan.CommandTCP, serializesSocksAddr(metadata)); err != nil {
-			c.Close()
 			return nil, err
 		}
 
 		return NewConn(c, t), nil
 	}
 
-	c, err := dialer.DialContext(ctx, "tcp", t.addr, t.Base.DialOptions(opts...)...)
+	c, err = dialer.DialContext(ctx, "tcp", t.addr, t.Base.DialOptions(opts...)...)
 	if err != nil {
 		return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
 	}
@@ -137,33 +160,44 @@ func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata, opts ...
 func (t *Trojan) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
 	var c net.Conn
 
-	// grpc transport
+	// gun transport
 	if t.transport != nil && len(opts) == 0 {
 		c, err = gun.StreamGunWithTransport(t.transport, t.gunConfig)
 		if err != nil {
-			return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
+			return nil, err
 		}
+
 		defer safeConnClose(c, err)
-	} else {
-		c, err = dialer.DialContext(ctx, "tcp", t.addr, t.Base.DialOptions(opts...)...)
+
+		c, err = t.instance.PrepareXTLSConn(c)
 		if err != nil {
-			return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
+			return nil, err
 		}
-		defer safeConnClose(c, err)
-		tcpKeepAlive(c)
-		c, err = t.plainStream(c)
-		if err != nil {
-			return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
+
+		if err = t.instance.WriteHeader(c, trojan.CommandUDP, serializesSocksAddr(metadata)); err != nil {
+			return nil, err
 		}
+
+		pc := t.instance.PacketConn(c)
+
+		return NewPacketConn(pc, t), nil
 	}
 
-	err = t.instance.WriteHeader(c, trojan.CommandUDP, serializesSocksAddr(metadata))
+	c, err = dialer.DialContext(ctx, "tcp", t.addr, t.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
+	}
+
+	tcpKeepAlive(c)
+
+	defer safeConnClose(c, err)
+
+	c, err = t.StreamPacketConn(c, metadata)
 	if err != nil {
 		return nil, err
 	}
 
-	pc := t.instance.PacketConn(c)
-	return newPacketConn(pc, t), err
+	return NewPacketConn(c.(net.PacketConn), t), nil
 }
 
 func NewTrojan(option TrojanOption) (*Trojan, error) {

adapter/outbound/util.go

@@ -13,8 +13,8 @@ import (
 
 func tcpKeepAlive(c net.Conn) {
 	if tcp, ok := c.(*net.TCPConn); ok {
-		tcp.SetKeepAlive(true)
-		tcp.SetKeepAlivePeriod(30 * time.Second)
+		_ = tcp.SetKeepAlive(true)
+		_ = tcp.SetKeepAlivePeriod(30 * time.Second)
 	}
 }
 
@@ -25,14 +25,14 @@ func serializesSocksAddr(metadata *C.Metadata) []byte {
 	port := []byte{uint8(p >> 8), uint8(p & 0xff)}
 	switch metadata.AddrType {
 	case socks5.AtypDomainName:
-		len := uint8(len(metadata.Host))
+		lenM := uint8(len(metadata.Host))
 		host := []byte(metadata.Host)
-		buf = [][]byte{{aType, len}, host, port}
+		buf = [][]byte{{aType, lenM}, host, port}
 	case socks5.AtypIPv4:
-		host := metadata.DstIP.To4()
+		host := metadata.DstIP.AsSlice()
 		buf = [][]byte{{aType}, host, port}
 	case socks5.AtypIPv6:
-		host := metadata.DstIP.To16()
+		host := metadata.DstIP.AsSlice()
 		buf = [][]byte{{aType}, host, port}
 	}
 	return bytes.Join(buf, nil)
@@ -52,7 +52,7 @@ func resolveUDPAddr(network, address string) (*net.UDPAddr, error) {
 }
 
 func safeConnClose(c net.Conn, err error) {
-	if err != nil {
-		c.Close()
+	if err != nil && c != nil {
+		_ = c.Close()
 	}
 }

adapter/outbound/vless.go

@@ -58,6 +58,7 @@ type VlessOption struct {
 	ServerName     string            `proxy:"servername,omitempty"`
 }
 
+// StreamConn implements C.ProxyAdapter
 func (v *Vless) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 	var err error
 	switch v.option.Network {
@@ -147,6 +148,26 @@ func (v *Vless) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 	return v.client.StreamConn(c, parseVlessAddr(metadata))
 }
 
+// StreamPacketConn implements C.ProxyAdapter
+func (v *Vless) StreamPacketConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+	// vmess use stream-oriented udp with a special address, so we needs a net.UDPAddr
+	if !metadata.Resolved() {
+		ip, err := resolver.ResolveIP(metadata.Host)
+		if err != nil {
+			return nil, errors.New("can't resolve ip")
+		}
+		metadata.DstIP = ip
+	}
+
+	var err error
+	c, err = v.StreamConn(c, metadata)
+	if err != nil {
+		return nil, fmt.Errorf("new vmess client error: %v", err)
+	}
+
+	return WrapConn(&vlessPacketConn{Conn: c, rAddr: metadata.UDPAddr()}), nil
+}
+
 func (v *Vless) streamTLSOrXTLSConn(conn net.Conn, isH2 bool) (net.Conn, error) {
 	host, _, _ := net.SplitHostPort(v.addr)
 
@@ -219,18 +240,18 @@ func (v *Vless) DialContext(ctx context.Context, metadata *C.Metadata, opts ...d
 
 // ListenPacketContext implements C.ProxyAdapter
 func (v *Vless) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
-	// vless use stream-oriented udp with a special address, so we needs a net.UDPAddr
-	if !metadata.Resolved() {
-		ip, err := resolver.ResolveIP(metadata.Host)
-		if err != nil {
-			return nil, errors.New("can't resolve ip")
-		}
-		metadata.DstIP = ip
-	}
-
 	var c net.Conn
 	// gun transport
 	if v.transport != nil && len(opts) == 0 {
+		// vless use stream-oriented udp with a special address, so we needs a net.UDPAddr
+		if !metadata.Resolved() {
+			ip, err := resolver.ResolveIP(metadata.Host)
+			if err != nil {
+				return nil, errors.New("can't resolve ip")
+			}
+			metadata.DstIP = ip
+		}
+
 		c, err = gun.StreamGunWithTransport(v.transport, v.gunConfig)
 		if err != nil {
 			return nil, err
@@ -238,22 +259,27 @@ func (v *Vless) ListenPacketContext(ctx context.Context, metadata *C.Metadata, o
 		defer safeConnClose(c, err)
 
 		c, err = v.client.StreamConn(c, parseVlessAddr(metadata))
-	} else {
-		c, err = dialer.DialContext(ctx, "tcp", v.addr, v.Base.DialOptions(opts...)...)
 		if err != nil {
-			return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
+			return nil, fmt.Errorf("new vless client error: %v", err)
 		}
-		tcpKeepAlive(c)
-		defer safeConnClose(c, err)
 
-		c, err = v.StreamConn(c, metadata)
+		return NewPacketConn(&vlessPacketConn{Conn: c, rAddr: metadata.UDPAddr()}, v), nil
 	}
 
+	c, err = dialer.DialContext(ctx, "tcp", v.addr, v.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
+	}
+
+	tcpKeepAlive(c)
+	defer safeConnClose(c, err)
+
+	c, err = v.StreamPacketConn(c, metadata)
 	if err != nil {
 		return nil, fmt.Errorf("new vless client error: %v", err)
 	}
 
-	return newPacketConn(&vlessPacketConn{Conn: c, rAddr: metadata.UDPAddr()}, v), nil
+	return NewPacketConn(c.(net.PacketConn), v), nil
 }
 
 func parseVlessAddr(metadata *C.Metadata) *vless.DstAddr {
@@ -263,11 +289,11 @@ func parseVlessAddr(metadata *C.Metadata) *vless.DstAddr {
 	case C.AtypIPv4:
 		addrType = byte(vless.AtypIPv4)
 		addr = make([]byte, net.IPv4len)
-		copy(addr[:], metadata.DstIP.To4())
+		copy(addr[:], metadata.DstIP.AsSlice())
 	case C.AtypIPv6:
 		addrType = byte(vless.AtypIPv6)
 		addr = make([]byte, net.IPv6len)
-		copy(addr[:], metadata.DstIP.To16())
+		copy(addr[:], metadata.DstIP.AsSlice())
 	case C.AtypDomainName:
 		addrType = byte(vless.AtypDomainName)
 		addr = make([]byte, len(metadata.Host)+1)
@@ -292,7 +318,7 @@ type vlessPacketConn struct {
 	mux    sync.Mutex
 }
 
-func (vc *vlessPacketConn) WriteTo(b []byte, addr net.Addr) (int, error) {
+func (vc *vlessPacketConn) WriteTo(b []byte, _ net.Addr) (int, error) {
 	total := len(b)
 	if total == 0 {
 		return 0, nil

adapter/outbound/vmess.go

@@ -3,7 +3,6 @@ package outbound
 import (
 	"context"
 	"crypto/tls"
-	"errors"
 	"fmt"
 	"net"
 	"net/http"
@@ -195,6 +194,26 @@ func (v *Vmess) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 	return v.client.StreamConn(c, parseVmessAddr(metadata))
 }
 
+// StreamPacketConn implements C.ProxyAdapter
+func (v *Vmess) StreamPacketConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+	// vmess use stream-oriented udp with a special address, so we needs a net.UDPAddr
+	if !metadata.Resolved() {
+		ip, err := resolver.ResolveIP(metadata.Host)
+		if err != nil {
+			return c, fmt.Errorf("can't resolve ip: %w", err)
+		}
+		metadata.DstIP = ip
+	}
+
+	var err error
+	c, err = v.StreamConn(c, metadata)
+	if err != nil {
+		return c, fmt.Errorf("new vmess client error: %v", err)
+	}
+
+	return WrapConn(&vmessPacketConn{Conn: c, rAddr: metadata.UDPAddr()}), nil
+}
+
 // DialContext implements C.ProxyAdapter
 func (v *Vmess) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
 	// gun transport
@@ -226,18 +245,18 @@ func (v *Vmess) DialContext(ctx context.Context, metadata *C.Metadata, opts ...d
 
 // ListenPacketContext implements C.ProxyAdapter
 func (v *Vmess) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
-	// vmess use stream-oriented udp with a special address, so we needs a net.UDPAddr
-	if !metadata.Resolved() {
-		ip, err := resolver.ResolveIP(metadata.Host)
-		if err != nil {
-			return nil, errors.New("can't resolve ip")
-		}
-		metadata.DstIP = ip
-	}
-
 	var c net.Conn
 	// gun transport
 	if v.transport != nil && len(opts) == 0 {
+		// vmess use stream-oriented udp with a special address, so we needs a net.UDPAddr
+		if !metadata.Resolved() {
+			ip, err := resolver.ResolveIP(metadata.Host)
+			if err != nil {
+				return nil, fmt.Errorf("can't resolve ip: %w", err)
+			}
+			metadata.DstIP = ip
+		}
+
 		c, err = gun.StreamGunWithTransport(v.transport, v.gunConfig)
 		if err != nil {
 			return nil, err
@@ -245,22 +264,27 @@ func (v *Vmess) ListenPacketContext(ctx context.Context, metadata *C.Metadata, o
 		defer safeConnClose(c, err)
 
 		c, err = v.client.StreamConn(c, parseVmessAddr(metadata))
-	} else {
-		c, err = dialer.DialContext(ctx, "tcp", v.addr, v.Base.DialOptions(opts...)...)
 		if err != nil {
-			return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
+			return nil, fmt.Errorf("new vmess client error: %v", err)
 		}
-		tcpKeepAlive(c)
-		defer safeConnClose(c, err)
 
-		c, err = v.StreamConn(c, metadata)
+		return NewPacketConn(&vmessPacketConn{Conn: c, rAddr: metadata.UDPAddr()}, v), nil
 	}
 
+	c, err = dialer.DialContext(ctx, "tcp", v.addr, v.Base.DialOptions(opts...)...)
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %s", v.addr, err.Error())
+	}
+
+	tcpKeepAlive(c)
+	defer safeConnClose(c, err)
+
+	c, err = v.StreamPacketConn(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
+	return NewPacketConn(c.(net.PacketConn), v), nil
 }
 
 func NewVmess(option VmessOption) (*Vmess, error) {
@@ -342,11 +366,11 @@ func parseVmessAddr(metadata *C.Metadata) *vmess.DstAddr {
 	case C.AtypIPv4:
 		addrType = byte(vmess.AtypIPv4)
 		addr = make([]byte, net.IPv4len)
-		copy(addr[:], metadata.DstIP.To4())
+		copy(addr[:], metadata.DstIP.AsSlice())
 	case C.AtypIPv6:
 		addrType = byte(vmess.AtypIPv6)
 		addr = make([]byte, net.IPv6len)
-		copy(addr[:], metadata.DstIP.To16())
+		copy(addr[:], metadata.DstIP.AsSlice())
 	case C.AtypDomainName:
 		addrType = byte(vmess.AtypDomainName)
 		addr = make([]byte, len(metadata.Host)+1)
@@ -368,7 +392,7 @@ type vmessPacketConn struct {
 	rAddr net.Addr
 }
 
-func (uc *vmessPacketConn) WriteTo(b []byte, addr net.Addr) (int, error) {
+func (uc *vmessPacketConn) WriteTo(b []byte, _ net.Addr) (int, error) {
 	return uc.Conn.Write(b)
 }
 

adapter/outboundgroup/fallback.go

@@ -14,7 +14,7 @@ import (
 type Fallback struct {
 	*outbound.Base
 	disableUDP bool
-	single     *singledo.Single
+	single     *singledo.Single[[]C.Proxy]
 	providers  []provider.ProxyProvider
 }
 
@@ -73,11 +73,11 @@ func (f *Fallback) Unwrap(metadata *C.Metadata) C.Proxy {
 }
 
 func (f *Fallback) proxies(touch bool) []C.Proxy {
-	elm, _, _ := f.single.Do(func() (any, error) {
+	elm, _, _ := f.single.Do(func() ([]C.Proxy, error) {
 		return getProvidersProxies(f.providers, touch), nil
 	})
 
-	return elm.([]C.Proxy)
+	return elm
 }
 
 func (f *Fallback) findAliveProxy(touch bool) C.Proxy {
@@ -99,7 +99,7 @@ func NewFallback(option *GroupCommonOption, providers []provider.ProxyProvider)
 			Interface:   option.Interface,
 			RoutingMark: option.RoutingMark,
 		}),
-		single:     singledo.NewSingle(defaultGetProxiesDuration),
+		single:     singledo.NewSingle[[]C.Proxy](defaultGetProxiesDuration),
 		providers:  providers,
 		disableUDP: option.DisableUDP,
 	}

adapter/outboundgroup/loadbalance.go

@@ -22,7 +22,7 @@ type strategyFn = func(proxies []C.Proxy, metadata *C.Metadata) C.Proxy
 type LoadBalance struct {
 	*outbound.Base
 	disableUDP bool
-	single     *singledo.Single
+	single     *singledo.Single[[]C.Proxy]
 	providers  []provider.ProxyProvider
 	strategyFn strategyFn
 }
@@ -50,7 +50,7 @@ func getKey(metadata *C.Metadata) string {
 		}
 	}
 
-	if metadata.DstIP == nil {
+	if !metadata.DstIP.IsValid() {
 		return ""
 	}
 
@@ -140,11 +140,11 @@ func (lb *LoadBalance) Unwrap(metadata *C.Metadata) C.Proxy {
 }
 
 func (lb *LoadBalance) proxies(touch bool) []C.Proxy {
-	elm, _, _ := lb.single.Do(func() (any, error) {
+	elm, _, _ := lb.single.Do(func() ([]C.Proxy, error) {
 		return getProvidersProxies(lb.providers, touch), nil
 	})
 
-	return elm.([]C.Proxy)
+	return elm
 }
 
 // MarshalJSON implements C.ProxyAdapter
@@ -176,7 +176,7 @@ func NewLoadBalance(option *GroupCommonOption, providers []provider.ProxyProvide
 			Interface:   option.Interface,
 			RoutingMark: option.RoutingMark,
 		}),
-		single:     singledo.NewSingle(defaultGetProxiesDuration),
+		single:     singledo.NewSingle[[]C.Proxy](defaultGetProxiesDuration),
 		providers:  providers,
 		strategyFn: strategyFn,
 		disableUDP: option.DisableUDP,

adapter/outboundgroup/relay.go

@@ -4,17 +4,21 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"net"
+	"net/netip"
 
+	"github.com/Dreamacro/clash/adapter"
 	"github.com/Dreamacro/clash/adapter/outbound"
 	"github.com/Dreamacro/clash/common/singledo"
 	"github.com/Dreamacro/clash/component/dialer"
+	"github.com/Dreamacro/clash/component/resolver"
 	C "github.com/Dreamacro/clash/constant"
 	"github.com/Dreamacro/clash/constant/provider"
 )
 
 type Relay struct {
 	*outbound.Base
-	single    *singledo.Single
+	single    *singledo.Single[[]C.Proxy]
 	providers []provider.ProxyProvider
 }
 
@@ -34,30 +38,12 @@ func (r *Relay) DialContext(ctx context.Context, metadata *C.Metadata, opts ...d
 		return proxies[0].DialContext(ctx, metadata, r.Base.DialOptions(opts...)...)
 	}
 
-	first := proxies[0]
-	last := proxies[len(proxies)-1]
-
-	c, err := dialer.DialContext(ctx, "tcp", first.Addr(), r.Base.DialOptions(opts...)...)
+	c, err := r.streamContext(ctx, proxies, r.Base.DialOptions(opts...)...)
 	if err != nil {
-		return nil, fmt.Errorf("%s connect error: %w", first.Addr(), err)
-	}
-	tcpKeepAlive(c)
-
-	var currentMeta *C.Metadata
-	for _, proxy := range proxies[1:] {
-		currentMeta, err = addrToMetadata(proxy.Addr())
-		if err != nil {
-			return nil, err
-		}
-
-		c, err = first.StreamConn(c, currentMeta)
-		if err != nil {
-			return nil, fmt.Errorf("%s connect error: %w", first.Addr(), err)
-		}
-
-		first = proxy
+		return nil, err
 	}
 
+	last := proxies[len(proxies)-1]
 	c, err = last.StreamConn(c, metadata)
 	if err != nil {
 		return nil, fmt.Errorf("%s connect error: %w", last.Addr(), err)
@@ -66,6 +52,147 @@ func (r *Relay) DialContext(ctx context.Context, metadata *C.Metadata, opts ...d
 	return outbound.NewConn(c, r), nil
 }
 
+// ListenPacketContext implements C.ProxyAdapter
+func (r *Relay) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
+	var proxies []C.Proxy
+	for _, proxy := range r.proxies(metadata, true) {
+		if proxy.Type() != C.Direct {
+			proxies = append(proxies, proxy)
+		}
+	}
+
+	length := len(proxies)
+
+	switch length {
+	case 0:
+		return outbound.NewDirect().ListenPacketContext(ctx, metadata, r.Base.DialOptions(opts...)...)
+	case 1:
+		proxy := proxies[0]
+		if !proxy.SupportUDP() {
+			return nil, fmt.Errorf("%s connect error: proxy [%s] UDP is not supported", proxy.Addr(), proxy.Name())
+		}
+		return proxy.ListenPacketContext(ctx, metadata, r.Base.DialOptions(opts...)...)
+	}
+
+	var (
+		firstIndex          = 0
+		nextIndex           = 1
+		lastUDPOverTCPIndex = -1
+		rawUDPRelay         = false
+
+		first = proxies[firstIndex]
+		last  = proxies[length-1]
+
+		c           net.Conn
+		cc          net.Conn
+		err         error
+		currentMeta *C.Metadata
+	)
+
+	if !last.SupportUDP() {
+		return nil, fmt.Errorf("%s connect error: proxy [%s] UDP is not supported in relay chains", last.Addr(), last.Name())
+	}
+
+	rawUDPRelay, lastUDPOverTCPIndex = isRawUDPRelay(proxies)
+
+	if first.Type() == C.Socks5 {
+		cc1, err1 := dialer.DialContext(ctx, "tcp", first.Addr(), r.Base.DialOptions(opts...)...)
+		if err1 != nil {
+			return nil, fmt.Errorf("%s connect error: %w", first.Addr(), err)
+		}
+		cc = cc1
+		tcpKeepAlive(cc)
+
+		var pc net.PacketConn
+		pc, err = dialer.ListenPacket(ctx, "udp", "", r.Base.DialOptions(opts...)...)
+		c = outbound.WrapConn(pc)
+	} else if rawUDPRelay {
+		var pc net.PacketConn
+		pc, err = dialer.ListenPacket(ctx, "udp", "", r.Base.DialOptions(opts...)...)
+		c = outbound.WrapConn(pc)
+	} else {
+		firstIndex = lastUDPOverTCPIndex
+		nextIndex = firstIndex + 1
+		first = proxies[firstIndex]
+		c, err = r.streamContext(ctx, proxies[:nextIndex], r.Base.DialOptions(opts...)...)
+	}
+
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %w", first.Addr(), err)
+	}
+
+	if nextIndex < length {
+		for i, proxy := range proxies[nextIndex:] { // raw udp in loop
+			currentMeta, err = addrToMetadata(proxy.Addr())
+			if err != nil {
+				return nil, err
+			}
+			currentMeta.NetWork = C.UDP
+
+			if !isRawUDP(first) && !first.SupportUDP() {
+				return nil, fmt.Errorf("%s connect error: proxy [%s] UDP is not supported in relay chains", first.Addr(), first.Name())
+			}
+
+			if needResolveIP(first, currentMeta) {
+				var ip netip.Addr
+				ip, err = resolver.ResolveProxyServerHost(currentMeta.Host)
+				if err != nil {
+					return nil, fmt.Errorf("can't resolve ip: %w", err)
+				}
+				currentMeta.DstIP = ip
+			}
+
+			if cc != nil { // socks5
+				c, err = streamSocks5PacketConn(first, cc, c, currentMeta)
+				cc = nil
+			} else {
+				c, err = first.StreamPacketConn(c, currentMeta)
+			}
+
+			if err != nil {
+				return nil, fmt.Errorf("%s connect error: %w", first.Addr(), err)
+			}
+
+			if proxy.Type() == C.Socks5 {
+				endIndex := nextIndex + i + 1
+				cc, err = r.streamContext(ctx, proxies[:endIndex], r.Base.DialOptions(opts...)...)
+				if err != nil {
+					return nil, fmt.Errorf("%s connect error: %w", first.Addr(), err)
+				}
+			}
+
+			first = proxy
+		}
+	}
+
+	if cc != nil {
+		c, err = streamSocks5PacketConn(last, cc, c, metadata)
+	} else {
+		c, err = last.StreamPacketConn(c, metadata)
+	}
+
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %w", last.Addr(), err)
+	}
+
+	return outbound.NewPacketConn(c.(net.PacketConn), r), nil
+}
+
+// SupportUDP implements C.ProxyAdapter
+func (r *Relay) SupportUDP() bool {
+	proxies := r.rawProxies(true)
+
+	l := len(proxies)
+
+	if l == 0 {
+		return true
+	}
+
+	last := proxies[l-1]
+
+	return isRawUDP(last) || last.SupportUDP()
+}
+
 // MarshalJSON implements C.ProxyAdapter
 func (r *Relay) MarshalJSON() ([]byte, error) {
 	var all []string
@@ -79,11 +206,11 @@ func (r *Relay) MarshalJSON() ([]byte, error) {
 }
 
 func (r *Relay) rawProxies(touch bool) []C.Proxy {
-	elm, _, _ := r.single.Do(func() (any, error) {
+	elm, _, _ := r.single.Do(func() ([]C.Proxy, error) {
 		return getProvidersProxies(r.providers, touch), nil
 	})
 
-	return elm.([]C.Proxy)
+	return elm
 }
 
 func (r *Relay) proxies(metadata *C.Metadata, touch bool) []C.Proxy {
@@ -100,6 +227,83 @@ func (r *Relay) proxies(metadata *C.Metadata, touch bool) []C.Proxy {
 	return proxies
 }
 
+func (r *Relay) streamContext(ctx context.Context, proxies []C.Proxy, opts ...dialer.Option) (net.Conn, error) {
+	first := proxies[0]
+
+	c, err := dialer.DialContext(ctx, "tcp", first.Addr(), opts...)
+	if err != nil {
+		return nil, fmt.Errorf("%s connect error: %w", first.Addr(), err)
+	}
+	tcpKeepAlive(c)
+
+	if len(proxies) > 1 {
+		var currentMeta *C.Metadata
+		for _, proxy := range proxies[1:] {
+			currentMeta, err = addrToMetadata(proxy.Addr())
+			if err != nil {
+				return nil, err
+			}
+
+			c, err = first.StreamConn(c, currentMeta)
+			if err != nil {
+				return nil, fmt.Errorf("%s connect error: %w", first.Addr(), err)
+			}
+
+			first = proxy
+		}
+	}
+
+	return c, nil
+}
+
+func streamSocks5PacketConn(proxy C.Proxy, cc, c net.Conn, metadata *C.Metadata) (net.Conn, error) {
+	pc, err := proxy.(*adapter.Proxy).ProxyAdapter.(*outbound.Socks5).StreamSocks5PacketConn(cc, c.(net.PacketConn), metadata)
+	return outbound.WrapConn(pc), err
+}
+
+func isRawUDPRelay(proxies []C.Proxy) (bool, int) {
+	var (
+		lastIndex           = len(proxies) - 1
+		last                = proxies[lastIndex]
+		isLastRawUDP        = isRawUDP(last)
+		isUDPOverTCP        = false
+		lastUDPOverTCPIndex = -1
+	)
+
+	for i := lastIndex; i >= 0; i-- {
+		p := proxies[i]
+
+		isUDPOverTCP = isUDPOverTCP || !isRawUDP(p)
+
+		if isLastRawUDP && isUDPOverTCP && lastUDPOverTCPIndex == -1 {
+			lastUDPOverTCPIndex = i
+		}
+	}
+
+	if !isLastRawUDP {
+		lastUDPOverTCPIndex = lastIndex
+	}
+
+	return !isUDPOverTCP, lastUDPOverTCPIndex
+}
+
+func isRawUDP(proxy C.ProxyAdapter) bool {
+	if proxy.Type() == C.Shadowsocks || proxy.Type() == C.ShadowsocksR || proxy.Type() == C.Socks5 {
+		return true
+	}
+	return false
+}
+
+func needResolveIP(proxy C.ProxyAdapter, metadata *C.Metadata) bool {
+	if metadata.Resolved() {
+		return false
+	}
+	if proxy.Type() != C.Vmess && proxy.Type() != C.Vless {
+		return false
+	}
+	return true
+}
+
 func NewRelay(option *GroupCommonOption, providers []provider.ProxyProvider) *Relay {
 	return &Relay{
 		Base: outbound.NewBase(outbound.BaseOption{
@@ -108,7 +312,7 @@ func NewRelay(option *GroupCommonOption, providers []provider.ProxyProvider) *Re
 			Interface:   option.Interface,
 			RoutingMark: option.RoutingMark,
 		}),
-		single:    singledo.NewSingle(defaultGetProxiesDuration),
+		single:    singledo.NewSingle[[]C.Proxy](defaultGetProxiesDuration),
 		providers: providers,
 	}
 }

adapter/outboundgroup/selector.go

@@ -15,7 +15,7 @@ import (
 type Selector struct {
 	*outbound.Base
 	disableUDP bool
-	single     *singledo.Single
+	single     *singledo.Single[C.Proxy]
 	selected   string
 	providers  []provider.ProxyProvider
 }
@@ -83,7 +83,7 @@ func (s *Selector) Unwrap(metadata *C.Metadata) C.Proxy {
 }
 
 func (s *Selector) selectedProxy(touch bool) C.Proxy {
-	elm, _, _ := s.single.Do(func() (any, error) {
+	elm, _, _ := s.single.Do(func() (C.Proxy, error) {
 		proxies := getProvidersProxies(s.providers, touch)
 		for _, proxy := range proxies {
 			if proxy.Name() == s.selected {
@@ -94,7 +94,7 @@ func (s *Selector) selectedProxy(touch bool) C.Proxy {
 		return proxies[0], nil
 	})
 
-	return elm.(C.Proxy)
+	return elm
 }
 
 func NewSelector(option *GroupCommonOption, providers []provider.ProxyProvider) *Selector {
@@ -106,7 +106,7 @@ func NewSelector(option *GroupCommonOption, providers []provider.ProxyProvider)
 			Interface:   option.Interface,
 			RoutingMark: option.RoutingMark,
 		}),
-		single:     singledo.NewSingle(defaultGetProxiesDuration),
+		single:     singledo.NewSingle[C.Proxy](defaultGetProxiesDuration),
 		providers:  providers,
 		selected:   selected,
 		disableUDP: option.DisableUDP,

adapter/outboundgroup/urltest.go

@@ -25,8 +25,8 @@ type URLTest struct {
 	tolerance  uint16
 	disableUDP bool
 	fastNode   C.Proxy
-	single     *singledo.Single
-	fastSingle *singledo.Single
+	single     *singledo.Single[[]C.Proxy]
+	fastSingle *singledo.Single[C.Proxy]
 	providers  []provider.ProxyProvider
 }
 
@@ -58,15 +58,15 @@ func (u *URLTest) Unwrap(metadata *C.Metadata) C.Proxy {
 }
 
 func (u *URLTest) proxies(touch bool) []C.Proxy {
-	elm, _, _ := u.single.Do(func() (any, error) {
+	elm, _, _ := u.single.Do(func() ([]C.Proxy, error) {
 		return getProvidersProxies(u.providers, touch), nil
 	})
 
-	return elm.([]C.Proxy)
+	return elm
 }
 
 func (u *URLTest) fast(touch bool) C.Proxy {
-	elm, _, _ := u.fastSingle.Do(func() (any, error) {
+	elm, _, _ := u.fastSingle.Do(func() (C.Proxy, error) {
 		proxies := u.proxies(touch)
 		fast := proxies[0]
 		min := fast.LastDelay()
@@ -96,7 +96,7 @@ func (u *URLTest) fast(touch bool) C.Proxy {
 		return u.fastNode, nil
 	})
 
-	return elm.(C.Proxy)
+	return elm
 }
 
 // SupportUDP implements C.ProxyAdapter
@@ -142,8 +142,8 @@ func NewURLTest(option *GroupCommonOption, providers []provider.ProxyProvider, o
 			Interface:   option.Interface,
 			RoutingMark: option.RoutingMark,
 		}),
-		single:     singledo.NewSingle(defaultGetProxiesDuration),
-		fastSingle: singledo.NewSingle(time.Second * 10),
+		single:     singledo.NewSingle[[]C.Proxy](defaultGetProxiesDuration),
+		fastSingle: singledo.NewSingle[C.Proxy](time.Second * 10),
 		providers:  providers,
 		disableUDP: option.DisableUDP,
 	}

adapter/outboundgroup/util.go

@@ -3,6 +3,7 @@ package outboundgroup
 import (
 	"fmt"
 	"net"
+	"net/netip"
 	"time"
 
 	C "github.com/Dreamacro/clash/constant"
@@ -15,20 +16,20 @@ func addrToMetadata(rawAddress string) (addr *C.Metadata, err error) {
 		return
 	}
 
-	ip := net.ParseIP(host)
-	if ip == nil {
+	ip, err := netip.ParseAddr(host)
+	if err != nil {
 		addr = &C.Metadata{
 			AddrType: C.AtypDomainName,
 			Host:     host,
-			DstIP:    nil,
+			DstIP:    netip.Addr{},
 			DstPort:  port,
 		}
-		return
-	} else if ip4 := ip.To4(); ip4 != nil {
+		return addr, nil
+	} else if ip.Is4() {
 		addr = &C.Metadata{
 			AddrType: C.AtypIPv4,
 			Host:     "",
-			DstIP:    ip4,
+			DstIP:    ip,
 			DstPort:  port,
 		}
 		return
@@ -45,7 +46,7 @@ func addrToMetadata(rawAddress string) (addr *C.Metadata, err error) {
 
 func tcpKeepAlive(c net.Conn) {
 	if tcp, ok := c.(*net.TCPConn); ok {
-		tcp.SetKeepAlive(true)
-		tcp.SetKeepAlivePeriod(30 * time.Second)
+		_ = tcp.SetKeepAlive(true)
+		_ = tcp.SetKeepAlivePeriod(30 * time.Second)
 	}
 }

adapter/parser.go

@@ -8,7 +8,7 @@ import (
 	C "github.com/Dreamacro/clash/constant"
 )
 
-func ParseProxy(mapping map[string]any) (C.Proxy, error) {
+func ParseProxy(mapping map[string]any, forceCertVerify bool) (C.Proxy, error) {
 	decoder := structure.NewDecoder(structure.Option{TagName: "proxy", WeaklyTypedInput: true})
 	proxyType, existType := mapping["type"].(string)
 	if !existType {
@@ -40,6 +40,9 @@ func ParseProxy(mapping map[string]any) (C.Proxy, error) {
 		if err != nil {
 			break
 		}
+		if forceCertVerify {
+			socksOption.SkipCertVerify = false
+		}
 		proxy = outbound.NewSocks5(*socksOption)
 	case "http":
 		httpOption := &outbound.HttpOption{}
@@ -47,6 +50,9 @@ func ParseProxy(mapping map[string]any) (C.Proxy, error) {
 		if err != nil {
 			break
 		}
+		if forceCertVerify {
+			httpOption.SkipCertVerify = false
+		}
 		proxy = outbound.NewHttp(*httpOption)
 	case "vmess":
 		vmessOption := &outbound.VmessOption{
@@ -59,6 +65,9 @@ func ParseProxy(mapping map[string]any) (C.Proxy, error) {
 		if err != nil {
 			break
 		}
+		if forceCertVerify {
+			vmessOption.SkipCertVerify = false
+		}
 		proxy, err = outbound.NewVmess(*vmessOption)
 	case "vless":
 		vlessOption := &outbound.VlessOption{}
@@ -66,6 +75,9 @@ func ParseProxy(mapping map[string]any) (C.Proxy, error) {
 		if err != nil {
 			break
 		}
+		if forceCertVerify {
+			vlessOption.SkipCertVerify = false
+		}
 		proxy, err = outbound.NewVless(*vlessOption)
 	case "snell":
 		snellOption := &outbound.SnellOption{}
@@ -80,6 +92,9 @@ func ParseProxy(mapping map[string]any) (C.Proxy, error) {
 		if err != nil {
 			break
 		}
+		if forceCertVerify {
+			trojanOption.SkipCertVerify = false
+		}
 		proxy, err = outbound.NewTrojan(*trojanOption)
 	default:
 		return nil, fmt.Errorf("unsupport proxy type: %s", proxyType)

adapter/provider/fetcher.go

@@ -16,28 +16,28 @@ var (
 	dirMode  os.FileMode = 0o755
 )
 
-type parser = func([]byte) (any, error)
+type parser[V any] func([]byte) (V, error)
 
-type fetcher struct {
+type fetcher[V any] struct {
 	name      string
 	vehicle   types.Vehicle
 	updatedAt *time.Time
 	ticker    *time.Ticker
 	done      chan struct{}
 	hash      [16]byte
-	parser    parser
-	onUpdate  func(any)
+	parser    parser[V]
+	onUpdate  func(V)
 }
 
-func (f *fetcher) Name() string {
+func (f *fetcher[V]) Name() string {
 	return f.name
 }
 
-func (f *fetcher) VehicleType() types.VehicleType {
+func (f *fetcher[V]) VehicleType() types.VehicleType {
 	return f.vehicle.Type()
 }
 
-func (f *fetcher) Initial() (any, error) {
+func (f *fetcher[V]) Initial() (V, error) {
 	var (
 		buf     []byte
 		err     error
@@ -53,24 +53,24 @@ func (f *fetcher) Initial() (any, error) {
 	}
 
 	if err != nil {
-		return nil, err
+		return getZero[V](), err
 	}
 
 	proxies, err := f.parser(buf)
 	if err != nil {
 		if !isLocal {
-			return nil, err
+			return getZero[V](), err
 		}
 
 		// parse local file error, fallback to remote
 		buf, err = f.vehicle.Read()
 		if err != nil {
-			return nil, err
+			return getZero[V](), err
 		}
 
 		proxies, err = f.parser(buf)
 		if err != nil {
-			return nil, err
+			return getZero[V](), err
 		}
 
 		isLocal = false
@@ -78,7 +78,7 @@ func (f *fetcher) Initial() (any, error) {
 
 	if f.vehicle.Type() != types.File && !isLocal {
 		if err := safeWrite(f.vehicle.Path(), buf); err != nil {
-			return nil, err
+			return getZero[V](), err
 		}
 	}
 
@@ -92,28 +92,28 @@ func (f *fetcher) Initial() (any, error) {
 	return proxies, nil
 }
 
-func (f *fetcher) Update() (any, bool, error) {
+func (f *fetcher[V]) Update() (V, bool, error) {
 	buf, err := f.vehicle.Read()
 	if err != nil {
-		return nil, false, err
+		return getZero[V](), false, err
 	}
 
 	now := time.Now()
 	hash := md5.Sum(buf)
 	if bytes.Equal(f.hash[:], hash[:]) {
 		f.updatedAt = &now
-		os.Chtimes(f.vehicle.Path(), now, now)
-		return nil, true, nil
+		_ = os.Chtimes(f.vehicle.Path(), now, now)
+		return getZero[V](), true, nil
 	}
 
 	proxies, err := f.parser(buf)
 	if err != nil {
-		return nil, false, err
+		return getZero[V](), false, err
 	}
 
 	if f.vehicle.Type() != types.File {
 		if err := safeWrite(f.vehicle.Path(), buf); err != nil {
-			return nil, false, err
+			return getZero[V](), false, err
 		}
 	}
 
@@ -123,14 +123,14 @@ func (f *fetcher) Update() (any, bool, error) {
 	return proxies, false, nil
 }
 
-func (f *fetcher) Destroy() error {
+func (f *fetcher[V]) Destroy() error {
 	if f.ticker != nil {
 		f.done <- struct{}{}
 	}
 	return nil
 }
 
-func (f *fetcher) pullLoop() {
+func (f *fetcher[V]) pullLoop() {
 	for {
 		select {
 		case <-f.ticker.C:
@@ -168,13 +168,13 @@ func safeWrite(path string, buf []byte) error {
 	return os.WriteFile(path, buf, fileMode)
 }
 
-func newFetcher(name string, interval time.Duration, vehicle types.Vehicle, parser parser, onUpdate func(any)) *fetcher {
+func newFetcher[V any](name string, interval time.Duration, vehicle types.Vehicle, parser parser[V], onUpdate func(V)) *fetcher[V] {
 	var ticker *time.Ticker
 	if interval != 0 {
 		ticker = time.NewTicker(interval)
 	}
 
-	return &fetcher{
+	return &fetcher[V]{
 		name:     name,
 		ticker:   ticker,
 		vehicle:  vehicle,
@@ -183,3 +183,8 @@ func newFetcher(name string, interval time.Duration, vehicle types.Vehicle, pars
 		onUpdate: onUpdate,
 	}
 }
+
+func getZero[V any]() V {
+	var result V
+	return result
+}

adapter/provider/healthcheck.go

@@ -65,14 +65,14 @@ func (hc *HealthCheck) touch() {
 }
 
 func (hc *HealthCheck) check() {
-	b, _ := batch.New(context.Background(), batch.WithConcurrencyNum(10))
+	b, _ := batch.New[bool](context.Background(), batch.WithConcurrencyNum[bool](10))
 	for _, proxy := range hc.proxies {
 		p := proxy
-		b.Go(p.Name(), func() (any, error) {
+		b.Go(p.Name(), func() (bool, error) {
 			ctx, cancel := context.WithTimeout(context.Background(), defaultURLTestTimeout)
 			defer cancel()
-			p.URLTest(ctx, hc.url)
-			return nil, nil
+			_, _ = p.URLTest(ctx, hc.url)
+			return false, nil
 		})
 	}
 	b.Wait()

adapter/provider/parser.go

@@ -20,15 +20,16 @@ type healthCheckSchema struct {
 }
 
 type proxyProviderSchema struct {
-	Type        string            `provider:"type"`
-	Path        string            `provider:"path"`
-	URL         string            `provider:"url,omitempty"`
-	Interval    int               `provider:"interval,omitempty"`
-	Filter      string            `provider:"filter,omitempty"`
-	HealthCheck healthCheckSchema `provider:"health-check,omitempty"`
+	Type            string            `provider:"type"`
+	Path            string            `provider:"path"`
+	URL             string            `provider:"url,omitempty"`
+	Interval        int               `provider:"interval,omitempty"`
+	Filter          string            `provider:"filter,omitempty"`
+	HealthCheck     healthCheckSchema `provider:"health-check,omitempty"`
+	ForceCertVerify bool              `provider:"force-cert-verify,omitempty"`
 }
 
-func ParseProxyProvider(name string, mapping map[string]any) (types.ProxyProvider, error) {
+func ParseProxyProvider(name string, mapping map[string]any, forceCertVerify bool) (types.ProxyProvider, error) {
 	decoder := structure.NewDecoder(structure.Option{TagName: "provider", WeaklyTypedInput: true})
 
 	schema := &proxyProviderSchema{
@@ -36,6 +37,11 @@ func ParseProxyProvider(name string, mapping map[string]any) (types.ProxyProvide
 			Lazy: true,
 		},
 	}
+
+	if forceCertVerify {
+		schema.ForceCertVerify = true
+	}
+
 	if err := decoder.Decode(mapping, schema); err != nil {
 		return nil, err
 	}
@@ -60,5 +66,5 @@ func ParseProxyProvider(name string, mapping map[string]any) (types.ProxyProvide
 
 	interval := time.Duration(uint(schema.Interval)) * time.Second
 	filter := schema.Filter
-	return NewProxySetProvider(name, interval, filter, vehicle, hc)
+	return NewProxySetProvider(name, interval, filter, vehicle, hc, schema.ForceCertVerify)
 }

adapter/provider/provider.go

@@ -12,7 +12,7 @@ import (
 	C "github.com/Dreamacro/clash/constant"
 	types "github.com/Dreamacro/clash/constant/provider"
 
-	"gopkg.in/yaml.v2"
+	"gopkg.in/yaml.v3"
 )
 
 const (
@@ -23,13 +23,13 @@ type ProxySchema struct {
 	Proxies []map[string]any `yaml:"proxies"`
 }
 
-// for auto gc
+// ProxySetProvider for auto gc
 type ProxySetProvider struct {
 	*proxySetProvider
 }
 
 type proxySetProvider struct {
-	*fetcher
+	*fetcher[[]C.Proxy]
 	proxies     []C.Proxy
 	healthCheck *HealthCheck
 }
@@ -93,10 +93,10 @@ func (pp *proxySetProvider) setProxies(proxies []C.Proxy) {
 
 func stopProxyProvider(pd *ProxySetProvider) {
 	pd.healthCheck.close()
-	pd.fetcher.Destroy()
+	_ = pd.fetcher.Destroy()
 }
 
-func NewProxySetProvider(name string, interval time.Duration, filter string, vehicle types.Vehicle, hc *HealthCheck) (*ProxySetProvider, error) {
+func NewProxySetProvider(name string, interval time.Duration, filter string, vehicle types.Vehicle, hc *HealthCheck, forceCertVerify bool) (*ProxySetProvider, error) {
 	filterReg, err := regexp.Compile(filter)
 	if err != nil {
 		return nil, fmt.Errorf("invalid filter regex: %w", err)
@@ -111,45 +111,7 @@ func NewProxySetProvider(name string, interval time.Duration, filter string, veh
 		healthCheck: hc,
 	}
 
-	onUpdate := func(elm any) {
-		ret := elm.([]C.Proxy)
-		pd.setProxies(ret)
-	}
-
-	proxiesParseAndFilter := func(buf []byte) (any, error) {
-		schema := &ProxySchema{}
-
-		if err := yaml.Unmarshal(buf, schema); err != nil {
-			return nil, err
-		}
-
-		if schema.Proxies == nil {
-			return nil, errors.New("file must have a `proxies` field")
-		}
-
-		proxies := []C.Proxy{}
-		for idx, mapping := range schema.Proxies {
-			if name, ok := mapping["name"]; ok && len(filter) > 0 && !filterReg.MatchString(name.(string)) {
-				continue
-			}
-			proxy, err := adapter.ParseProxy(mapping)
-			if err != nil {
-				return nil, fmt.Errorf("proxy %d error: %w", idx, err)
-			}
-			proxies = append(proxies, proxy)
-		}
-
-		if len(proxies) == 0 {
-			if len(filter) > 0 {
-				return nil, errors.New("doesn't match any proxy, please check your filter")
-			}
-			return nil, errors.New("file doesn't have any proxy")
-		}
-
-		return proxies, nil
-	}
-
-	fetcher := newFetcher(name, interval, vehicle, proxiesParseAndFilter, onUpdate)
+	fetcher := newFetcher[[]C.Proxy](name, interval, vehicle, proxiesParseAndFilter(filter, filterReg, forceCertVerify), proxiesOnUpdate(pd))
 	pd.fetcher = fetcher
 
 	wrapper := &ProxySetProvider{pd}
@@ -157,7 +119,7 @@ func NewProxySetProvider(name string, interval time.Duration, filter string, veh
 	return wrapper, nil
 }
 
-// for auto gc
+// CompatibleProvider for auto gc
 type CompatibleProvider struct {
 	*compatibleProvider
 }
@@ -233,3 +195,44 @@ func NewCompatibleProvider(name string, proxies []C.Proxy, hc *HealthCheck) (*Co
 	runtime.SetFinalizer(wrapper, stopCompatibleProvider)
 	return wrapper, nil
 }
+
+func proxiesOnUpdate(pd *proxySetProvider) func([]C.Proxy) {
+	return func(elm []C.Proxy) {
+		pd.setProxies(elm)
+	}
+}
+
+func proxiesParseAndFilter(filter string, filterReg *regexp.Regexp, forceCertVerify bool) parser[[]C.Proxy] {
+	return func(buf []byte) ([]C.Proxy, error) {
+		schema := &ProxySchema{}
+
+		if err := yaml.Unmarshal(buf, schema); err != nil {
+			return nil, err
+		}
+
+		if schema.Proxies == nil {
+			return nil, errors.New("file must have a `proxies` field")
+		}
+
+		proxies := []C.Proxy{}
+		for idx, mapping := range schema.Proxies {
+			if name, ok := mapping["name"]; ok && len(filter) > 0 && !filterReg.MatchString(name.(string)) {
+				continue
+			}
+			proxy, err := adapter.ParseProxy(mapping, forceCertVerify)
+			if err != nil {
+				return nil, fmt.Errorf("proxy %d error: %w", idx, err)
+			}
+			proxies = append(proxies, proxy)
+		}
+
+		if len(proxies) == 0 {
+			if len(filter) > 0 {
+				return nil, errors.New("doesn't match any proxy, please check your filter")
+			}
+			return nil, errors.New("file doesn't have any proxy")
+		}
+
+		return proxies, nil
+	}
+}

common/batch/batch.go

@@ -5,10 +5,10 @@ import (
 	"sync"
 )
 
-type Option = func(b *Batch)
+type Option[T any] func(b *Batch[T])
 
-type Result struct {
-	Value any
+type Result[T any] struct {
+	Value T
 	Err   error
 }
 
@@ -17,8 +17,8 @@ type Error struct {
 	Err error
 }
 
-func WithConcurrencyNum(n int) Option {
-	return func(b *Batch) {
+func WithConcurrencyNum[T any](n int) Option[T] {
+	return func(b *Batch[T]) {
 		q := make(chan struct{}, n)
 		for i := 0; i < n; i++ {
 			q <- struct{}{}
@@ -28,8 +28,8 @@ func WithConcurrencyNum(n int) Option {
 }
 
 // Batch similar to errgroup, but can control the maximum number of concurrent
-type Batch struct {
-	result map[string]Result
+type Batch[T any] struct {
+	result map[string]Result[T]
 	queue  chan struct{}
 	wg     sync.WaitGroup
 	mux    sync.Mutex
@@ -38,7 +38,7 @@ type Batch struct {
 	cancel func()
 }
 
-func (b *Batch) Go(key string, fn func() (any, error)) {
+func (b *Batch[T]) Go(key string, fn func() (T, error)) {
 	b.wg.Add(1)
 	go func() {
 		defer b.wg.Done()
@@ -59,14 +59,14 @@ func (b *Batch) Go(key string, fn func() (any, error)) {
 			})
 		}
 
-		ret := Result{value, err}
+		ret := Result[T]{value, err}
 		b.mux.Lock()
 		defer b.mux.Unlock()
 		b.result[key] = ret
 	}()
 }
 
-func (b *Batch) Wait() *Error {
+func (b *Batch[T]) Wait() *Error {
 	b.wg.Wait()
 	if b.cancel != nil {
 		b.cancel()
@@ -74,26 +74,26 @@ func (b *Batch) Wait() *Error {
 	return b.err
 }
 
-func (b *Batch) WaitAndGetResult() (map[string]Result, *Error) {
+func (b *Batch[T]) WaitAndGetResult() (map[string]Result[T], *Error) {
 	err := b.Wait()
 	return b.Result(), err
 }
 
-func (b *Batch) Result() map[string]Result {
+func (b *Batch[T]) Result() map[string]Result[T] {
 	b.mux.Lock()
 	defer b.mux.Unlock()
-	copy := map[string]Result{}
+	copyM := map[string]Result[T]{}
 	for k, v := range b.result {
-		copy[k] = v
+		copyM[k] = v
 	}
-	return copy
+	return copyM
 }
 
-func New(ctx context.Context, opts ...Option) (*Batch, context.Context) {
+func New[T any](ctx context.Context, opts ...Option[T]) (*Batch[T], context.Context) {
 	ctx, cancel := context.WithCancel(ctx)
 
-	b := &Batch{
-		result: map[string]Result{},
+	b := &Batch[T]{
+		result: map[string]Result[T]{},
 	}
 
 	for _, o := range opts {

common/batch/batch_test.go

@@ -11,14 +11,14 @@ import (
 )
 
 func TestBatch(t *testing.T) {
-	b, _ := New(context.Background())
+	b, _ := New[string](context.Background())
 
 	now := time.Now()
-	b.Go("foo", func() (any, error) {
+	b.Go("foo", func() (string, error) {
 		time.Sleep(time.Millisecond * 100)
 		return "foo", nil
 	})
-	b.Go("bar", func() (any, error) {
+	b.Go("bar", func() (string, error) {
 		time.Sleep(time.Millisecond * 150)
 		return "bar", nil
 	})
@@ -32,20 +32,20 @@ func TestBatch(t *testing.T) {
 
 	for k, v := range result {
 		assert.NoError(t, v.Err)
-		assert.Equal(t, k, v.Value.(string))
+		assert.Equal(t, k, v.Value)
 	}
 }
 
 func TestBatchWithConcurrencyNum(t *testing.T) {
-	b, _ := New(
+	b, _ := New[string](
 		context.Background(),
-		WithConcurrencyNum(3),
+		WithConcurrencyNum[string](3),
 	)
 
 	now := time.Now()
 	for i := 0; i < 7; i++ {
 		idx := i
-		b.Go(strconv.Itoa(idx), func() (any, error) {
+		b.Go(strconv.Itoa(idx), func() (string, error) {
 			time.Sleep(time.Millisecond * 100)
 			return strconv.Itoa(idx), nil
 		})
@@ -57,21 +57,21 @@ func TestBatchWithConcurrencyNum(t *testing.T) {
 
 	for k, v := range result {
 		assert.NoError(t, v.Err)
-		assert.Equal(t, k, v.Value.(string))
+		assert.Equal(t, k, v.Value)
 	}
 }
 
 func TestBatchContext(t *testing.T) {
-	b, ctx := New(context.Background())
+	b, ctx := New[string](context.Background())
 
-	b.Go("error", func() (any, error) {
+	b.Go("error", func() (string, error) {
 		time.Sleep(time.Millisecond * 100)
-		return nil, errors.New("test error")
+		return "", errors.New("test error")
 	})
 
-	b.Go("ctx", func() (any, error) {
+	b.Go("ctx", func() (string, error) {
 		<-ctx.Done()
-		return nil, ctx.Err()
+		return "", ctx.Err()
 	})
 
 	result, err := b.WaitAndGetResult()

common/cache/cache.go

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

common/cache/cache_test.go

@@ -11,48 +11,50 @@ import (
 func TestCache_Basic(t *testing.T) {
 	interval := 200 * time.Millisecond
 	ttl := 20 * time.Millisecond
-	c := New(interval)
+	c := New[string, int](interval)
 	c.Put("int", 1, ttl)
-	c.Put("string", "a", ttl)
+
+	d := New[string, string](interval)
+	d.Put("string", "a", ttl)
 
 	i := c.Get("int")
-	assert.Equal(t, i.(int), 1, "should recv 1")
+	assert.Equal(t, i, 1, "should recv 1")
 
-	s := c.Get("string")
-	assert.Equal(t, s.(string), "a", "should recv 'a'")
+	s := d.Get("string")
+	assert.Equal(t, s, "a", "should recv 'a'")
 }
 
 func TestCache_TTL(t *testing.T) {
 	interval := 200 * time.Millisecond
 	ttl := 20 * time.Millisecond
 	now := time.Now()
-	c := New(interval)
+	c := New[string, int](interval)
 	c.Put("int", 1, ttl)
 	c.Put("int2", 2, ttl)
 
 	i := c.Get("int")
 	_, expired := c.GetWithExpire("int2")
-	assert.Equal(t, i.(int), 1, "should recv 1")
+	assert.Equal(t, i, 1, "should recv 1")
 	assert.True(t, now.Before(expired))
 
 	time.Sleep(ttl * 2)
 	i = c.Get("int")
 	j, _ := c.GetWithExpire("int2")
-	assert.Nil(t, i, "should recv nil")
-	assert.Nil(t, j, "should recv nil")
+	assert.True(t, i == 0, "should recv 0")
+	assert.True(t, j == 0, "should recv 0")
 }
 
 func TestCache_AutoCleanup(t *testing.T) {
 	interval := 10 * time.Millisecond
 	ttl := 15 * time.Millisecond
-	c := New(interval)
+	c := New[string, int](interval)
 	c.Put("int", 1, ttl)
 
 	time.Sleep(ttl * 2)
 	i := c.Get("int")
 	j, _ := c.GetWithExpire("int")
-	assert.Nil(t, i, "should recv nil")
-	assert.Nil(t, j, "should recv nil")
+	assert.True(t, i == 0, "should recv 0")
+	assert.True(t, j == 0, "should recv 0")
 }
 
 func TestCache_AutoGC(t *testing.T) {
@@ -60,7 +62,7 @@ func TestCache_AutoGC(t *testing.T) {
 	go func() {
 		interval := 10 * time.Millisecond
 		ttl := 15 * time.Millisecond
-		c := New(interval)
+		c := New[string, int](interval)
 		c.Put("int", 1, ttl)
 		sign <- struct{}{}
 	}()

common/cache/lrucache.go

@@ -3,49 +3,50 @@ package cache
 // Modified by https://github.com/die-net/lrucache
 
 import (
-	"container/list"
 	"sync"
 	"time"
+
+	"github.com/Dreamacro/clash/common/generics/list"
 )
 
 // Option is part of Functional Options Pattern
-type Option func(*LruCache)
+type Option[K comparable, V any] func(*LruCache[K, V])
 
 // EvictCallback is used to get a callback when a cache entry is evicted
-type EvictCallback = func(key any, value any)
+type EvictCallback[K comparable, V any] func(key K, value V)
 
 // WithEvict set the evict callback
-func WithEvict(cb EvictCallback) Option {
-	return func(l *LruCache) {
+func WithEvict[K comparable, V any](cb EvictCallback[K, V]) Option[K, V] {
+	return func(l *LruCache[K, V]) {
 		l.onEvict = cb
 	}
 }
 
 // WithUpdateAgeOnGet update expires when Get element
-func WithUpdateAgeOnGet() Option {
-	return func(l *LruCache) {
+func WithUpdateAgeOnGet[K comparable, V any]() Option[K, V] {
+	return func(l *LruCache[K, V]) {
 		l.updateAgeOnGet = true
 	}
 }
 
 // WithAge defined element max age (second)
-func WithAge(maxAge int64) Option {
-	return func(l *LruCache) {
+func WithAge[K comparable, V any](maxAge int64) Option[K, V] {
+	return func(l *LruCache[K, V]) {
 		l.maxAge = maxAge
 	}
 }
 
 // WithSize defined max length of LruCache
-func WithSize(maxSize int) Option {
-	return func(l *LruCache) {
+func WithSize[K comparable, V any](maxSize int) Option[K, V] {
+	return func(l *LruCache[K, V]) {
 		l.maxSize = maxSize
 	}
 }
 
 // WithStale decide whether Stale return is enabled.
 // If this feature is enabled, element will not get Evicted according to `WithAge`.
-func WithStale(stale bool) Option {
-	return func(l *LruCache) {
+func WithStale[K comparable, V any](stale bool) Option[K, V] {
+	return func(l *LruCache[K, V]) {
 		l.staleReturn = stale
 	}
 }
@@ -53,22 +54,22 @@ func WithStale(stale bool) Option {
 // LruCache is a thread-safe, in-memory lru-cache that evicts the
 // least recently used entries from memory when (if set) the entries are
 // older than maxAge (in seconds).  Use the New constructor to create one.
-type LruCache struct {
+type LruCache[K comparable, V any] struct {
 	maxAge         int64
 	maxSize        int
 	mu             sync.Mutex
-	cache          map[any]*list.Element
-	lru            *list.List // Front is least-recent
+	cache          map[K]*list.Element[*entry[K, V]]
+	lru            *list.List[*entry[K, V]] // Front is least-recent
 	updateAgeOnGet bool
 	staleReturn    bool
-	onEvict        EvictCallback
+	onEvict        EvictCallback[K, V]
 }
 
 // NewLRUCache creates an LruCache
-func NewLRUCache(options ...Option) *LruCache {
-	lc := &LruCache{
-		lru:   list.New(),
-		cache: make(map[any]*list.Element),
+func NewLRUCache[K comparable, V any](options ...Option[K, V]) *LruCache[K, V] {
+	lc := &LruCache[K, V]{
+		lru:   list.New[*entry[K, V]](),
+		cache: make(map[K]*list.Element[*entry[K, V]]),
 	}
 
 	for _, option := range options {
@@ -80,12 +81,12 @@ func NewLRUCache(options ...Option) *LruCache {
 
 // Get returns the any representation of a cached response and a bool
 // set to true if the key was found.
-func (c *LruCache) Get(key any) (any, bool) {
-	entry := c.get(key)
-	if entry == nil {
-		return nil, false
+func (c *LruCache[K, V]) Get(key K) (V, bool) {
+	el := c.get(key)
+	if el == nil {
+		return getZero[V](), false
 	}
-	value := entry.value
+	value := el.value
 
 	return value, true
 }
@@ -94,17 +95,17 @@ func (c *LruCache) Get(key any) (any, bool) {
 // a time.Time Give expected expires,
 // and a bool set to true if the key was found.
 // This method will NOT check the maxAge of element and will NOT update the expires.
-func (c *LruCache) GetWithExpire(key any) (any, time.Time, bool) {
-	entry := c.get(key)
-	if entry == nil {
-		return nil, time.Time{}, false
+func (c *LruCache[K, V]) GetWithExpire(key K) (V, time.Time, bool) {
+	el := c.get(key)
+	if el == nil {
+		return getZero[V](), time.Time{}, false
 	}
 
-	return entry.value, time.Unix(entry.expires, 0), true
+	return el.value, time.Unix(el.expires, 0), true
 }
 
 // Exist returns if key exist in cache but not put item to the head of linked list
-func (c *LruCache) Exist(key any) bool {
+func (c *LruCache[K, V]) Exist(key K) bool {
 	c.mu.Lock()
 	defer c.mu.Unlock()
 
@@ -113,7 +114,7 @@ func (c *LruCache) Exist(key any) bool {
 }
 
 // Set stores the any representation of a response for a given key.
-func (c *LruCache) Set(key any, value any) {
+func (c *LruCache[K, V]) Set(key K, value V) {
 	expires := int64(0)
 	if c.maxAge > 0 {
 		expires = time.Now().Unix() + c.maxAge
@@ -123,21 +124,21 @@ func (c *LruCache) Set(key any, value any) {
 
 // SetWithExpire stores the any representation of a response for a given key and given expires.
 // The expires time will round to second.
-func (c *LruCache) SetWithExpire(key any, value any, expires time.Time) {
+func (c *LruCache[K, V]) SetWithExpire(key K, value V, expires time.Time) {
 	c.mu.Lock()
 	defer c.mu.Unlock()
 
 	if le, ok := c.cache[key]; ok {
 		c.lru.MoveToBack(le)
-		e := le.Value.(*entry)
+		e := le.Value
 		e.value = value
 		e.expires = expires.Unix()
 	} else {
-		e := &entry{key: key, value: value, expires: expires.Unix()}
+		e := &entry[K, V]{key: key, value: value, expires: expires.Unix()}
 		c.cache[key] = c.lru.PushBack(e)
 
 		if c.maxSize > 0 {
-			if len := c.lru.Len(); len > c.maxSize {
+			if elLen := c.lru.Len(); elLen > c.maxSize {
 				c.deleteElement(c.lru.Front())
 			}
 		}
@@ -147,23 +148,23 @@ func (c *LruCache) SetWithExpire(key any, value any, expires time.Time) {
 }
 
 // CloneTo clone and overwrite elements to another LruCache
-func (c *LruCache) CloneTo(n *LruCache) {
+func (c *LruCache[K, V]) CloneTo(n *LruCache[K, V]) {
 	c.mu.Lock()
 	defer c.mu.Unlock()
 
 	n.mu.Lock()
 	defer n.mu.Unlock()
 
-	n.lru = list.New()
-	n.cache = make(map[any]*list.Element)
+	n.lru = list.New[*entry[K, V]]()
+	n.cache = make(map[K]*list.Element[*entry[K, V]])
 
 	for e := c.lru.Front(); e != nil; e = e.Next() {
-		elm := e.Value.(*entry)
+		elm := e.Value
 		n.cache[elm.key] = n.lru.PushBack(elm)
 	}
 }
 
-func (c *LruCache) get(key any) *entry {
+func (c *LruCache[K, V]) get(key K) *entry[K, V] {
 	c.mu.Lock()
 	defer c.mu.Unlock()
 
@@ -172,7 +173,7 @@ func (c *LruCache) get(key any) *entry {
 		return nil
 	}
 
-	if !c.staleReturn && c.maxAge > 0 && le.Value.(*entry).expires <= time.Now().Unix() {
+	if !c.staleReturn && c.maxAge > 0 && le.Value.expires <= time.Now().Unix() {
 		c.deleteElement(le)
 		c.maybeDeleteOldest()
 
@@ -180,15 +181,15 @@ func (c *LruCache) get(key any) *entry {
 	}
 
 	c.lru.MoveToBack(le)
-	entry := le.Value.(*entry)
+	el := le.Value
 	if c.maxAge > 0 && c.updateAgeOnGet {
-		entry.expires = time.Now().Unix() + c.maxAge
+		el.expires = time.Now().Unix() + c.maxAge
 	}
-	return entry
+	return el
 }
 
 // Delete removes the value associated with a key.
-func (c *LruCache) Delete(key any) {
+func (c *LruCache[K, V]) Delete(key K) {
 	c.mu.Lock()
 
 	if le, ok := c.cache[key]; ok {
@@ -198,35 +199,40 @@ func (c *LruCache) Delete(key any) {
 	c.mu.Unlock()
 }
 
-func (c *LruCache) maybeDeleteOldest() {
+func (c *LruCache[K, V]) maybeDeleteOldest() {
 	if !c.staleReturn && c.maxAge > 0 {
 		now := time.Now().Unix()
-		for le := c.lru.Front(); le != nil && le.Value.(*entry).expires <= now; le = c.lru.Front() {
+		for le := c.lru.Front(); le != nil && le.Value.expires <= now; le = c.lru.Front() {
 			c.deleteElement(le)
 		}
 	}
 }
 
-func (c *LruCache) deleteElement(le *list.Element) {
+func (c *LruCache[K, V]) deleteElement(le *list.Element[*entry[K, V]]) {
 	c.lru.Remove(le)
-	e := le.Value.(*entry)
+	e := le.Value
 	delete(c.cache, e.key)
 	if c.onEvict != nil {
 		c.onEvict(e.key, e.value)
 	}
 }
 
-func (c *LruCache) Clear() error {
+func (c *LruCache[K, V]) Clear() error {
 	c.mu.Lock()
 
-	c.cache = make(map[any]*list.Element)
+	c.cache = make(map[K]*list.Element[*entry[K, V]])
 
 	c.mu.Unlock()
 	return nil
 }
 
-type entry struct {
-	key     any
-	value   any
+type entry[K comparable, V any] struct {
+	key     K
+	value   V
 	expires int64
 }
+
+func getZero[T any]() T {
+	var result T
+	return result
+}

common/cache/lrucache_test.go

@@ -19,7 +19,7 @@ var entries = []struct {
 }
 
 func TestLRUCache(t *testing.T) {
-	c := NewLRUCache()
+	c := NewLRUCache[string, string]()
 
 	for _, e := range entries {
 		c.Set(e.key, e.value)
@@ -32,7 +32,7 @@ func TestLRUCache(t *testing.T) {
 	for _, e := range entries {
 		value, ok := c.Get(e.key)
 		if assert.True(t, ok) {
-			assert.Equal(t, e.value, value.(string))
+			assert.Equal(t, e.value, value)
 		}
 	}
 
@@ -45,25 +45,25 @@ func TestLRUCache(t *testing.T) {
 }
 
 func TestLRUMaxAge(t *testing.T) {
-	c := NewLRUCache(WithAge(86400))
+	c := NewLRUCache[string, string](WithAge[string, string](86400))
 
 	now := time.Now().Unix()
 	expected := now + 86400
 
 	// Add one expired entry
 	c.Set("foo", "bar")
-	c.lru.Back().Value.(*entry).expires = now
+	c.lru.Back().Value.expires = now
 
 	// Reset
 	c.Set("foo", "bar")
-	e := c.lru.Back().Value.(*entry)
+	e := c.lru.Back().Value
 	assert.True(t, e.expires >= now)
-	c.lru.Back().Value.(*entry).expires = now
+	c.lru.Back().Value.expires = now
 
 	// Set a few and verify expiration times
 	for _, s := range entries {
 		c.Set(s.key, s.value)
-		e := c.lru.Back().Value.(*entry)
+		e := c.lru.Back().Value
 		assert.True(t, e.expires >= expected && e.expires <= expected+10)
 	}
 
@@ -77,7 +77,7 @@ func TestLRUMaxAge(t *testing.T) {
 	for _, s := range entries {
 		le, ok := c.cache[s.key]
 		if assert.True(t, ok) {
-			le.Value.(*entry).expires = now
+			le.Value.expires = now
 		}
 	}
 
@@ -88,22 +88,22 @@ func TestLRUMaxAge(t *testing.T) {
 }
 
 func TestLRUpdateOnGet(t *testing.T) {
-	c := NewLRUCache(WithAge(86400), WithUpdateAgeOnGet())
+	c := NewLRUCache[string, string](WithAge[string, string](86400), WithUpdateAgeOnGet[string, string]())
 
 	now := time.Now().Unix()
 	expires := now + 86400/2
 
 	// Add one expired entry
 	c.Set("foo", "bar")
-	c.lru.Back().Value.(*entry).expires = expires
+	c.lru.Back().Value.expires = expires
 
 	_, ok := c.Get("foo")
 	assert.True(t, ok)
-	assert.True(t, c.lru.Back().Value.(*entry).expires > expires)
+	assert.True(t, c.lru.Back().Value.expires > expires)
 }
 
 func TestMaxSize(t *testing.T) {
-	c := NewLRUCache(WithSize(2))
+	c := NewLRUCache[string, string](WithSize[string, string](2))
 	// Add one expired entry
 	c.Set("foo", "bar")
 	_, ok := c.Get("foo")
@@ -117,7 +117,7 @@ func TestMaxSize(t *testing.T) {
 }
 
 func TestExist(t *testing.T) {
-	c := NewLRUCache(WithSize(1))
+	c := NewLRUCache[int, int](WithSize[int, int](1))
 	c.Set(1, 2)
 	assert.True(t, c.Exist(1))
 	c.Set(2, 3)
@@ -126,11 +126,11 @@ func TestExist(t *testing.T) {
 
 func TestEvict(t *testing.T) {
 	temp := 0
-	evict := func(key any, value any) {
-		temp = key.(int) + value.(int)
+	evict := func(key int, value int) {
+		temp = key + value
 	}
 
-	c := NewLRUCache(WithEvict(evict), WithSize(1))
+	c := NewLRUCache[int, int](WithEvict[int, int](evict), WithSize[int, int](1))
 	c.Set(1, 2)
 	c.Set(2, 3)
 
@@ -138,21 +138,22 @@ func TestEvict(t *testing.T) {
 }
 
 func TestSetWithExpire(t *testing.T) {
-	c := NewLRUCache(WithAge(1))
+	c := NewLRUCache[int, *struct{}](WithAge[int, *struct{}](1))
 	now := time.Now().Unix()
 
 	tenSecBefore := time.Unix(now-10, 0)
-	c.SetWithExpire(1, 2, tenSecBefore)
+	c.SetWithExpire(1, &struct{}{}, tenSecBefore)
 
 	// res is expected not to exist, and expires should be empty time.Time
 	res, expires, exist := c.GetWithExpire(1)
-	assert.Equal(t, nil, res)
+
+	assert.True(t, nil == res)
 	assert.Equal(t, time.Time{}, expires)
 	assert.Equal(t, false, exist)
 }
 
 func TestStale(t *testing.T) {
-	c := NewLRUCache(WithAge(1), WithStale(true))
+	c := NewLRUCache[int, int](WithAge[int, int](1), WithStale[int, int](true))
 	now := time.Now().Unix()
 
 	tenSecBefore := time.Unix(now-10, 0)
@@ -165,11 +166,11 @@ func TestStale(t *testing.T) {
 }
 
 func TestCloneTo(t *testing.T) {
-	o := NewLRUCache(WithSize(10))
+	o := NewLRUCache[string, int](WithSize[string, int](10))
 	o.Set("1", 1)
 	o.Set("2", 2)
 
-	n := NewLRUCache(WithSize(2))
+	n := NewLRUCache[string, int](WithSize[string, int](2))
 	n.Set("3", 3)
 	n.Set("4", 4)
 

common/cert/cert.go

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

common/cert/cert_test.go

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

common/cert/storage.go

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

common/generics/list/list.go

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

common/net/relay.go

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

common/nnip/netip.go

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

common/observable/iterable.go

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

common/observable/observable.go

@@ -5,14 +5,14 @@ import (
 	"sync"
 )
 
-type Observable struct {
-	iterable Iterable
-	listener map[Subscription]*Subscriber
+type Observable[T any] struct {
+	iterable Iterable[T]
+	listener map[Subscription[T]]*Subscriber[T]
 	mux      sync.Mutex
 	done     bool
 }
 
-func (o *Observable) process() {
+func (o *Observable[T]) process() {
 	for item := range o.iterable {
 		o.mux.Lock()
 		for _, sub := range o.listener {
@@ -23,7 +23,7 @@ func (o *Observable) process() {
 	o.close()
 }
 
-func (o *Observable) close() {
+func (o *Observable[T]) close() {
 	o.mux.Lock()
 	defer o.mux.Unlock()
 
@@ -33,18 +33,18 @@ func (o *Observable) close() {
 	}
 }
 
-func (o *Observable) Subscribe() (Subscription, error) {
+func (o *Observable[T]) Subscribe() (Subscription[T], error) {
 	o.mux.Lock()
 	defer o.mux.Unlock()
 	if o.done {
-		return nil, errors.New("Observable is closed")
+		return nil, errors.New("observable is closed")
 	}
-	subscriber := newSubscriber()
+	subscriber := newSubscriber[T]()
 	o.listener[subscriber.Out()] = subscriber
 	return subscriber.Out(), nil
 }
 
-func (o *Observable) UnSubscribe(sub Subscription) {
+func (o *Observable[T]) UnSubscribe(sub Subscription[T]) {
 	o.mux.Lock()
 	defer o.mux.Unlock()
 	subscriber, exist := o.listener[sub]
@@ -55,10 +55,10 @@ func (o *Observable) UnSubscribe(sub Subscription) {
 	subscriber.Close()
 }
 
-func NewObservable(any Iterable) *Observable {
-	observable := &Observable{
-		iterable: any,
-		listener: map[Subscription]*Subscriber{},
+func NewObservable[T any](iter Iterable[T]) *Observable[T] {
+	observable := &Observable[T]{
+		iterable: iter,
+		listener: map[Subscription[T]]*Subscriber[T]{},
 	}
 	go observable.process()
 	return observable

common/observable/observable_test.go

@@ -9,8 +9,8 @@ import (
 	"go.uber.org/atomic"
 )
 
-func iterator(item []any) chan any {
-	ch := make(chan any)
+func iterator[T any](item []T) chan T {
+	ch := make(chan T)
 	go func() {
 		time.Sleep(100 * time.Millisecond)
 		for _, elm := range item {
@@ -22,8 +22,8 @@ func iterator(item []any) chan any {
 }
 
 func TestObservable(t *testing.T) {
-	iter := iterator([]any{1, 2, 3, 4, 5})
-	src := NewObservable(iter)
+	iter := iterator[int]([]int{1, 2, 3, 4, 5})
+	src := NewObservable[int](iter)
 	data, err := src.Subscribe()
 	assert.Nil(t, err)
 	count := 0
@@ -34,15 +34,15 @@ func TestObservable(t *testing.T) {
 }
 
 func TestObservable_MultiSubscribe(t *testing.T) {
-	iter := iterator([]any{1, 2, 3, 4, 5})
-	src := NewObservable(iter)
+	iter := iterator[int]([]int{1, 2, 3, 4, 5})
+	src := NewObservable[int](iter)
 	ch1, _ := src.Subscribe()
 	ch2, _ := src.Subscribe()
 	count := atomic.NewInt32(0)
 
 	var wg sync.WaitGroup
 	wg.Add(2)
-	waitCh := func(ch <-chan any) {
+	waitCh := func(ch <-chan int) {
 		for range ch {
 			count.Inc()
 		}
@@ -55,8 +55,8 @@ func TestObservable_MultiSubscribe(t *testing.T) {
 }
 
 func TestObservable_UnSubscribe(t *testing.T) {
-	iter := iterator([]any{1, 2, 3, 4, 5})
-	src := NewObservable(iter)
+	iter := iterator[int]([]int{1, 2, 3, 4, 5})
+	src := NewObservable[int](iter)
 	data, err := src.Subscribe()
 	assert.Nil(t, err)
 	src.UnSubscribe(data)
@@ -65,8 +65,8 @@ func TestObservable_UnSubscribe(t *testing.T) {
 }
 
 func TestObservable_SubscribeClosedSource(t *testing.T) {
-	iter := iterator([]any{1})
-	src := NewObservable(iter)
+	iter := iterator[int]([]int{1})
+	src := NewObservable[int](iter)
 	data, _ := src.Subscribe()
 	<-data
 
@@ -75,18 +75,18 @@ func TestObservable_SubscribeClosedSource(t *testing.T) {
 }
 
 func TestObservable_UnSubscribeWithNotExistSubscription(t *testing.T) {
-	sub := Subscription(make(chan any))
-	iter := iterator([]any{1})
-	src := NewObservable(iter)
+	sub := Subscription[int](make(chan int))
+	iter := iterator[int]([]int{1})
+	src := NewObservable[int](iter)
 	src.UnSubscribe(sub)
 }
 
 func TestObservable_SubscribeGoroutineLeak(t *testing.T) {
-	iter := iterator([]any{1, 2, 3, 4, 5})
-	src := NewObservable(iter)
+	iter := iterator[int]([]int{1, 2, 3, 4, 5})
+	src := NewObservable[int](iter)
 	max := 100
 
-	var list []Subscription
+	var list []Subscription[int]
 	for i := 0; i < max; i++ {
 		ch, _ := src.Subscribe()
 		list = append(list, ch)
@@ -94,7 +94,7 @@ func TestObservable_SubscribeGoroutineLeak(t *testing.T) {
 
 	var wg sync.WaitGroup
 	wg.Add(max)
-	waitCh := func(ch <-chan any) {
+	waitCh := func(ch <-chan int) {
 		for range ch {
 		}
 		wg.Done()
@@ -115,11 +115,11 @@ func TestObservable_SubscribeGoroutineLeak(t *testing.T) {
 }
 
 func Benchmark_Observable_1000(b *testing.B) {
-	ch := make(chan any)
-	o := NewObservable(ch)
+	ch := make(chan int)
+	o := NewObservable[int](ch)
 	num := 1000
 
-	subs := []Subscription{}
+	subs := []Subscription[int]{}
 	for i := 0; i < num; i++ {
 		sub, _ := o.Subscribe()
 		subs = append(subs, sub)
@@ -130,7 +130,7 @@ func Benchmark_Observable_1000(b *testing.B) {
 
 	b.ResetTimer()
 	for _, sub := range subs {
-		go func(s Subscription) {
+		go func(s Subscription[int]) {
 			for range s {
 			}
 			wg.Done()

common/observable/subscriber.go

@@ -4,30 +4,30 @@ import (
 	"sync"
 )
 
-type Subscription <-chan any
+type Subscription[T any] <-chan T
 
-type Subscriber struct {
-	buffer chan any
+type Subscriber[T any] struct {
+	buffer chan T
 	once   sync.Once
 }
 
-func (s *Subscriber) Emit(item any) {
+func (s *Subscriber[T]) Emit(item T) {
 	s.buffer <- item
 }
 
-func (s *Subscriber) Out() Subscription {
+func (s *Subscriber[T]) Out() Subscription[T] {
 	return s.buffer
 }
 
-func (s *Subscriber) Close() {
+func (s *Subscriber[T]) Close() {
 	s.once.Do(func() {
 		close(s.buffer)
 	})
 }
 
-func newSubscriber() *Subscriber {
-	sub := &Subscriber{
-		buffer: make(chan any, 200),
+func newSubscriber[T any]() *Subscriber[T] {
+	sub := &Subscriber[T]{
+		buffer: make(chan T, 200),
 	}
 	return sub
 }

common/picker/picker.go

@@ -9,7 +9,7 @@ import (
 // Picker provides synchronization, and Context cancelation
 // for groups of goroutines working on subtasks of a common task.
 // Inspired by errGroup
-type Picker struct {
+type Picker[T any] struct {
 	ctx    context.Context
 	cancel func()
 
@@ -17,12 +17,12 @@ type Picker struct {
 
 	once    sync.Once
 	errOnce sync.Once
-	result  any
+	result  T
 	err     error
 }
 
-func newPicker(ctx context.Context, cancel func()) *Picker {
-	return &Picker{
+func newPicker[T any](ctx context.Context, cancel func()) *Picker[T] {
+	return &Picker[T]{
 		ctx:    ctx,
 		cancel: cancel,
 	}
@@ -30,20 +30,20 @@ func newPicker(ctx context.Context, cancel func()) *Picker {
 
 // WithContext returns a new Picker and an associated Context derived from ctx.
 // and cancel when first element return.
-func WithContext(ctx context.Context) (*Picker, context.Context) {
+func WithContext[T any](ctx context.Context) (*Picker[T], context.Context) {
 	ctx, cancel := context.WithCancel(ctx)
-	return newPicker(ctx, cancel), ctx
+	return newPicker[T](ctx, cancel), ctx
 }
 
 // WithTimeout returns a new Picker and an associated Context derived from ctx with timeout.
-func WithTimeout(ctx context.Context, timeout time.Duration) (*Picker, context.Context) {
+func WithTimeout[T any](ctx context.Context, timeout time.Duration) (*Picker[T], context.Context) {
 	ctx, cancel := context.WithTimeout(ctx, timeout)
-	return newPicker(ctx, cancel), ctx
+	return newPicker[T](ctx, cancel), ctx
 }
 
 // Wait blocks until all function calls from the Go method have returned,
 // then returns the first nil error result (if any) from them.
-func (p *Picker) Wait() any {
+func (p *Picker[T]) Wait() T {
 	p.wg.Wait()
 	if p.cancel != nil {
 		p.cancel()
@@ -52,13 +52,13 @@ func (p *Picker) Wait() any {
 }
 
 // Error return the first error (if all success return nil)
-func (p *Picker) Error() error {
+func (p *Picker[T]) Error() error {
 	return p.err
 }
 
 // Go calls the given function in a new goroutine.
 // The first call to return a nil error cancels the group; its result will be returned by Wait.
-func (p *Picker) Go(f func() (any, error)) {
+func (p *Picker[T]) Go(f func() (T, error)) {
 	p.wg.Add(1)
 
 	go func() {

common/picker/picker_test.go

@@ -8,33 +8,38 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func sleepAndSend(ctx context.Context, delay int, input any) func() (any, error) {
-	return func() (any, error) {
+func sleepAndSend[T any](ctx context.Context, delay int, input T) func() (T, error) {
+	return func() (T, error) {
 		timer := time.NewTimer(time.Millisecond * time.Duration(delay))
 		select {
 		case <-timer.C:
 			return input, nil
 		case <-ctx.Done():
-			return nil, ctx.Err()
+			return getZero[T](), ctx.Err()
 		}
 	}
 }
 
 func TestPicker_Basic(t *testing.T) {
-	picker, ctx := WithContext(context.Background())
+	picker, ctx := WithContext[int](context.Background())
 	picker.Go(sleepAndSend(ctx, 30, 2))
 	picker.Go(sleepAndSend(ctx, 20, 1))
 
 	number := picker.Wait()
 	assert.NotNil(t, number)
-	assert.Equal(t, number.(int), 1)
+	assert.Equal(t, number, 1)
 }
 
 func TestPicker_Timeout(t *testing.T) {
-	picker, ctx := WithTimeout(context.Background(), time.Millisecond*5)
+	picker, ctx := WithTimeout[int](context.Background(), time.Millisecond*5)
 	picker.Go(sleepAndSend(ctx, 20, 1))
 
 	number := picker.Wait()
-	assert.Nil(t, number)
+	assert.Equal(t, number, getZero[int]())
 	assert.NotNil(t, picker.Error())
 }
+
+func getZero[T any]() T {
+	var result T
+	return result
+}

common/pool/alloc.go

@@ -52,8 +52,8 @@ func (alloc *Allocator) Put(buf []byte) error {
 		return errors.New("allocator Put() incorrect buffer size")
 	}
 
-	//lint:ignore SA6002 ignore temporarily
 	//nolint
+	//lint:ignore SA6002 ignore temporarily
 	alloc.buffers[bits].Put(buf)
 	return nil
 }

common/queue/queue.go

@@ -5,13 +5,13 @@ import (
 )
 
 // Queue is a simple concurrent safe queue
-type Queue struct {
-	items []any
+type Queue[T any] struct {
+	items []T
 	lock  sync.RWMutex
 }
 
 // Put add the item to the queue.
-func (q *Queue) Put(items ...any) {
+func (q *Queue[T]) Put(items ...T) {
 	if len(items) == 0 {
 		return
 	}
@@ -22,9 +22,9 @@ func (q *Queue) Put(items ...any) {
 }
 
 // Pop returns the head of items.
-func (q *Queue) Pop() any {
+func (q *Queue[T]) Pop() T {
 	if len(q.items) == 0 {
-		return nil
+		return GetZero[T]()
 	}
 
 	q.lock.Lock()
@@ -35,9 +35,9 @@ func (q *Queue) Pop() any {
 }
 
 // Last returns the last of item.
-func (q *Queue) Last() any {
+func (q *Queue[T]) Last() T {
 	if len(q.items) == 0 {
-		return nil
+		return GetZero[T]()
 	}
 
 	q.lock.RLock()
@@ -47,8 +47,8 @@ func (q *Queue) Last() any {
 }
 
 // Copy get the copy of queue.
-func (q *Queue) Copy() []any {
-	items := []any{}
+func (q *Queue[T]) Copy() []T {
+	items := []T{}
 	q.lock.RLock()
 	items = append(items, q.items...)
 	q.lock.RUnlock()
@@ -56,7 +56,7 @@ func (q *Queue) Copy() []any {
 }
 
 // Len returns the number of items in this queue.
-func (q *Queue) Len() int64 {
+func (q *Queue[T]) Len() int64 {
 	q.lock.Lock()
 	defer q.lock.Unlock()
 
@@ -64,8 +64,13 @@ func (q *Queue) Len() int64 {
 }
 
 // New is a constructor for a new concurrent safe queue.
-func New(hint int64) *Queue {
-	return &Queue{
-		items: make([]any, 0, hint),
+func New[T any](hint int64) *Queue[T] {
+	return &Queue[T]{
+		items: make([]T, 0, hint),
 	}
 }
+
+func GetZero[T any]() T {
+	var result T
+	return result
+}

common/singledo/singledo.go

@@ -5,28 +5,27 @@ import (
 	"time"
 )
 
-type call struct {
+type call[T any] struct {
 	wg  sync.WaitGroup
-	val any
+	val T
 	err error
 }
 
-type Single struct {
+type Single[T any] struct {
 	mux    sync.Mutex
 	last   time.Time
 	wait   time.Duration
-	call   *call
-	result *Result
+	call   *call[T]
+	result *Result[T]
 }
 
-type Result struct {
-	Val any
+type Result[T any] struct {
+	Val T
 	Err error
 }
 
 // Do single.Do likes sync.singleFlight
-//lint:ignore ST1008 it likes sync.singleFlight
-func (s *Single) Do(fn func() (any, error)) (v any, err error, shared bool) {
+func (s *Single[T]) Do(fn func() (T, error)) (v T, err error, shared bool) {
 	s.mux.Lock()
 	now := time.Now()
 	if now.Before(s.last.Add(s.wait)) {
@@ -34,31 +33,31 @@ func (s *Single) Do(fn func() (any, error)) (v any, err error, shared bool) {
 		return s.result.Val, s.result.Err, true
 	}
 
-	if call := s.call; call != nil {
+	if callM := s.call; callM != nil {
 		s.mux.Unlock()
-		call.wg.Wait()
-		return call.val, call.err, true
+		callM.wg.Wait()
+		return callM.val, callM.err, true
 	}
 
-	call := &call{}
-	call.wg.Add(1)
-	s.call = call
+	callM := &call[T]{}
+	callM.wg.Add(1)
+	s.call = callM
 	s.mux.Unlock()
-	call.val, call.err = fn()
-	call.wg.Done()
+	callM.val, callM.err = fn()
+	callM.wg.Done()
 
 	s.mux.Lock()
 	s.call = nil
-	s.result = &Result{call.val, call.err}
+	s.result = &Result[T]{callM.val, callM.err}
 	s.last = now
 	s.mux.Unlock()
-	return call.val, call.err, false
+	return callM.val, callM.err, false
 }
 
-func (s *Single) Reset() {
+func (s *Single[T]) Reset() {
 	s.last = time.Time{}
 }
 
-func NewSingle(wait time.Duration) *Single {
-	return &Single{wait: wait}
+func NewSingle[T any](wait time.Duration) *Single[T] {
+	return &Single[T]{wait: wait}
 }

common/singledo/singledo_test.go

@@ -10,13 +10,13 @@ import (
 )
 
 func TestBasic(t *testing.T) {
-	single := NewSingle(time.Millisecond * 30)
+	single := NewSingle[int](time.Millisecond * 30)
 	foo := 0
 	shardCount := atomic.NewInt32(0)
-	call := func() (any, error) {
+	call := func() (int, error) {
 		foo++
 		time.Sleep(time.Millisecond * 5)
-		return nil, nil
+		return 0, nil
 	}
 
 	var wg sync.WaitGroup
@@ -38,32 +38,32 @@ func TestBasic(t *testing.T) {
 }
 
 func TestTimer(t *testing.T) {
-	single := NewSingle(time.Millisecond * 30)
+	single := NewSingle[int](time.Millisecond * 30)
 	foo := 0
-	call := func() (any, error) {
+	callM := func() (int, error) {
 		foo++
-		return nil, nil
+		return 0, nil
 	}
 
-	single.Do(call)
+	_, _, _ = single.Do(callM)
 	time.Sleep(10 * time.Millisecond)
-	_, _, shard := single.Do(call)
+	_, _, shard := single.Do(callM)
 
 	assert.Equal(t, 1, foo)
 	assert.True(t, shard)
 }
 
 func TestReset(t *testing.T) {
-	single := NewSingle(time.Millisecond * 30)
+	single := NewSingle[int](time.Millisecond * 30)
 	foo := 0
-	call := func() (any, error) {
+	callM := func() (int, error) {
 		foo++
-		return nil, nil
+		return 0, nil
 	}
 
-	single.Do(call)
+	_, _, _ = single.Do(callM)
 	single.Reset()
-	single.Do(call)
+	_, _, _ = single.Do(callM)
 
 	assert.Equal(t, 2, foo)
 }

common/structure/structure.go

@@ -159,9 +159,19 @@ func (d *Decoder) decodeSlice(name string, data any, val reflect.Value) error {
 		for valSlice.Len() <= i {
 			valSlice = reflect.Append(valSlice, reflect.Zero(valElemType))
 		}
-		currentField := valSlice.Index(i)
-
 		fieldName := fmt.Sprintf("%s[%d]", name, i)
+		if currentData == nil {
+			// in weakly type mode, null will convert to zero value
+			if d.option.WeaklyTypedInput {
+				continue
+			}
+			// in non-weakly type mode, null will convert to nil if element's zero value is nil, otherwise return an error
+			if elemKind := valElemType.Kind(); elemKind == reflect.Map || elemKind == reflect.Slice {
+				continue
+			}
+			return fmt.Errorf("'%s' can not be null", fieldName)
+		}
+		currentField := valSlice.Index(i)
 		if err := d.decode(fieldName, currentData, currentField); err != nil {
 			return err
 		}

common/structure/structure_test.go

@@ -137,3 +137,45 @@ func TestStructure_Nest(t *testing.T) {
 	assert.Nil(t, err)
 	assert.Equal(t, s.BazOptional, goal)
 }
+
+func TestStructure_SliceNilValue(t *testing.T) {
+	rawMap := map[string]any{
+		"foo": 1,
+		"bar": []any{"bar", nil},
+	}
+
+	goal := &BazSlice{
+		Foo: 1,
+		Bar: []string{"bar", ""},
+	}
+
+	s := &BazSlice{}
+	err := weakTypeDecoder.Decode(rawMap, s)
+	assert.Nil(t, err)
+	assert.Equal(t, goal.Bar, s.Bar)
+
+	s = &BazSlice{}
+	err = decoder.Decode(rawMap, s)
+	assert.NotNil(t, err)
+}
+
+func TestStructure_SliceNilValueComplex(t *testing.T) {
+	rawMap := map[string]any{
+		"bar": []any{map[string]any{"bar": "foo"}, nil},
+	}
+
+	s := &struct {
+		Bar []map[string]any `test:"bar"`
+	}{}
+
+	err := decoder.Decode(rawMap, s)
+	assert.Nil(t, err)
+	assert.Nil(t, s.Bar[1])
+
+	ss := &struct {
+		Bar []Baz `test:"bar"`
+	}{}
+
+	err = decoder.Decode(rawMap, ss)
+	assert.NotNil(t, err)
+}

component/dhcp/dhcp.go

@@ -4,7 +4,9 @@ import (
 	"context"
 	"errors"
 	"net"
+	"net/netip"
 
+	"github.com/Dreamacro/clash/common/nnip"
 	"github.com/Dreamacro/clash/component/iface"
 
 	"github.com/insomniacslk/dhcp/dhcpv4"
@@ -15,14 +17,16 @@ var (
 	ErrNotFound      = errors.New("DNS option not found")
 )
 
-func ResolveDNSFromDHCP(context context.Context, ifaceName string) ([]net.IP, error) {
+func ResolveDNSFromDHCP(context context.Context, ifaceName string) ([]netip.Addr, error) {
 	conn, err := ListenDHCPClient(context, ifaceName)
 	if err != nil {
 		return nil, err
 	}
-	defer conn.Close()
+	defer func() {
+		_ = conn.Close()
+	}()
 
-	result := make(chan []net.IP, 1)
+	result := make(chan []netip.Addr, 1)
 
 	ifaceObj, err := iface.ResolveInterface(ifaceName)
 	if err != nil {
@@ -52,7 +56,7 @@ func ResolveDNSFromDHCP(context context.Context, ifaceName string) ([]net.IP, er
 	}
 }
 
-func receiveOffer(conn net.PacketConn, id dhcpv4.TransactionID, result chan<- []net.IP) {
+func receiveOffer(conn net.PacketConn, id dhcpv4.TransactionID, result chan<- []netip.Addr) {
 	defer close(result)
 
 	buf := make([]byte, dhcpv4.MaxMessageSize)
@@ -77,11 +81,17 @@ func receiveOffer(conn net.PacketConn, id dhcpv4.TransactionID, result chan<- []
 		}
 
 		dns := pkt.DNS()
-		if len(dns) == 0 {
+		l := len(dns)
+		if l == 0 {
 			return
 		}
 
-		result <- dns
+		dnsAddr := make([]netip.Addr, l)
+		for i := 0; i < l; i++ {
+			dnsAddr[i] = nnip.IpToAddr(dns[i])
+		}
+
+		result <- dnsAddr
 
 		return
 	}

component/dialer/bind_darwin.go

@@ -2,6 +2,7 @@ package dialer
 
 import (
 	"net"
+	"net/netip"
 	"syscall"
 
 	"github.com/Dreamacro/clash/component/iface"
@@ -19,12 +20,9 @@ func bindControl(ifaceIdx int, chain controlFn) controlFn {
 			}
 		}()
 
-		ipStr, _, err := net.SplitHostPort(address)
-		if err == nil {
-			ip := net.ParseIP(ipStr)
-			if ip != nil && !ip.IsGlobalUnicast() {
-				return
-			}
+		addrPort, err := netip.ParseAddrPort(address)
+		if err == nil && !addrPort.Addr().IsGlobalUnicast() {
+			return
 		}
 
 		var innerErr error
@@ -45,7 +43,7 @@ func bindControl(ifaceIdx int, chain controlFn) controlFn {
 	}
 }
 
-func bindIfaceToDialer(ifaceName string, dialer *net.Dialer, _ string, _ net.IP) error {
+func bindIfaceToDialer(ifaceName string, dialer *net.Dialer, _ string, _ netip.Addr) error {
 	ifaceObj, err := iface.ResolveInterface(ifaceName)
 	if err != nil {
 		return err

component/dialer/bind_linux.go

@@ -2,6 +2,7 @@ package dialer
 
 import (
 	"net"
+	"net/netip"
 	"syscall"
 
 	"golang.org/x/sys/unix"
@@ -17,12 +18,9 @@ func bindControl(ifaceName string, chain controlFn) controlFn {
 			}
 		}()
 
-		ipStr, _, err := net.SplitHostPort(address)
-		if err == nil {
-			ip := net.ParseIP(ipStr)
-			if ip != nil && !ip.IsGlobalUnicast() {
-				return
-			}
+		addrPort, err := netip.ParseAddrPort(address)
+		if err == nil && !addrPort.Addr().IsGlobalUnicast() {
+			return
 		}
 
 		var innerErr error
@@ -38,7 +36,7 @@ func bindControl(ifaceName string, chain controlFn) controlFn {
 	}
 }
 
-func bindIfaceToDialer(ifaceName string, dialer *net.Dialer, _ string, _ net.IP) error {
+func bindIfaceToDialer(ifaceName string, dialer *net.Dialer, _ string, _ netip.Addr) error {
 	dialer.Control = bindControl(ifaceName, dialer.Control)
 
 	return nil

component/dialer/bind_others.go

@@ -4,27 +4,28 @@ package dialer
 
 import (
 	"net"
+	"net/netip"
 	"strconv"
 	"strings"
 
 	"github.com/Dreamacro/clash/component/iface"
 )
 
-func lookupLocalAddr(ifaceName string, network string, destination net.IP, port int) (net.Addr, error) {
+func lookupLocalAddr(ifaceName string, network string, destination netip.Addr, port int) (net.Addr, error) {
 	ifaceObj, err := iface.ResolveInterface(ifaceName)
 	if err != nil {
 		return nil, err
 	}
 
-	var addr *net.IPNet
+	var addr *netip.Prefix
 	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 {
+		if destination.IsValid() {
+			if destination.Is4() {
 				addr, err = ifaceObj.PickIPv4Addr(destination)
 			} else {
 				addr, err = ifaceObj.PickIPv6Addr(destination)
@@ -39,12 +40,12 @@ func lookupLocalAddr(ifaceName string, network string, destination net.IP, port
 
 	if strings.HasPrefix(network, "tcp") {
 		return &net.TCPAddr{
-			IP:   addr.IP,
+			IP:   addr.Addr().AsSlice(),
 			Port: port,
 		}, nil
 	} else if strings.HasPrefix(network, "udp") {
 		return &net.UDPAddr{
-			IP:   addr.IP,
+			IP:   addr.Addr().AsSlice(),
 			Port: port,
 		}, nil
 	}
@@ -52,7 +53,7 @@ func lookupLocalAddr(ifaceName string, network string, destination net.IP, port
 	return nil, iface.ErrAddrNotFound
 }
 
-func bindIfaceToDialer(ifaceName string, dialer *net.Dialer, network string, destination net.IP) error {
+func bindIfaceToDialer(ifaceName string, dialer *net.Dialer, network string, destination netip.Addr) error {
 	if !destination.IsGlobalUnicast() {
 		return nil
 	}
@@ -83,7 +84,7 @@ func bindIfaceToListenConfig(ifaceName string, _ *net.ListenConfig, network, add
 
 	local, _ := strconv.ParseUint(port, 10, 16)
 
-	addr, err := lookupLocalAddr(ifaceName, network, nil, int(local))
+	addr, err := lookupLocalAddr(ifaceName, network, netip.Addr{}, int(local))
 	if err != nil {
 		return "", err
 	}

component/dialer/dialer.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"net"
+	"net/netip"
 
 	"github.com/Dreamacro/clash/component/resolver"
 )
@@ -29,7 +30,7 @@ func DialContext(ctx context.Context, network, address string, options ...Option
 			return nil, err
 		}
 
-		var ip net.IP
+		var ip netip.Addr
 		switch network {
 		case "tcp4", "udp4":
 			if !opt.direct {
@@ -88,7 +89,7 @@ func ListenPacket(ctx context.Context, network, address string, options ...Optio
 	return lc.ListenPacket(ctx, network, address)
 }
 
-func dialContext(ctx context.Context, network string, destination net.IP, port string, opt *option) (net.Conn, error) {
+func dialContext(ctx context.Context, network string, destination netip.Addr, port string, opt *option) (net.Conn, error) {
 	dialer := &net.Dialer{}
 	if opt.interfaceName != "" {
 		if err := bindIfaceToDialer(opt.interfaceName, dialer, network, destination); err != nil {
@@ -128,12 +129,12 @@ func dualStackDialContext(ctx context.Context, network, address string, opt *opt
 			case results <- result:
 			case <-returned:
 				if result.Conn != nil {
-					result.Conn.Close()
+					_ = result.Conn.Close()
 				}
 			}
 		}()
 
-		var ip net.IP
+		var ip netip.Addr
 		if ipv6 {
 			if !direct {
 				ip, result.error = resolver.ResolveIPv6ProxyServerHost(host)

component/dialer/mark_linux.go

@@ -4,14 +4,15 @@ package dialer
 
 import (
 	"net"
+	"net/netip"
 	"syscall"
 )
 
-func bindMarkToDialer(mark int, dialer *net.Dialer, _ string, _ net.IP) {
+func bindMarkToDialer(mark int, dialer *net.Dialer, _ string, _ netip.Addr) {
 	dialer.Control = bindMarkToControl(mark, dialer.Control)
 }
 
-func bindMarkToListenConfig(mark int, lc *net.ListenConfig, _, address string) {
+func bindMarkToListenConfig(mark int, lc *net.ListenConfig, _, _ string) {
 	lc.Control = bindMarkToControl(mark, lc.Control)
 }
 
@@ -23,20 +24,17 @@ func bindMarkToControl(mark int, chain controlFn) controlFn {
 			}
 		}()
 
-		ipStr, _, err := net.SplitHostPort(address)
-		if err == nil {
-			ip := net.ParseIP(ipStr)
-			if ip != nil && !ip.IsGlobalUnicast() {
-				return
-			}
+		addrPort, err := netip.ParseAddrPort(address)
+		if err == nil && !addrPort.Addr().IsGlobalUnicast() {
+			return
 		}
 
 		return c.Control(func(fd uintptr) {
 			switch network {
 			case "tcp4", "udp4":
-				syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_MARK, mark)
+				_ = syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_MARK, mark)
 			case "tcp6", "udp6":
-				syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_MARK, mark)
+				_ = syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_MARK, mark)
 			}
 		})
 	}

component/dialer/mark_nonlinux.go

@@ -4,6 +4,7 @@ package dialer
 
 import (
 	"net"
+	"net/netip"
 	"sync"
 
 	"github.com/Dreamacro/clash/log"
@@ -17,10 +18,10 @@ func printMarkWarn() {
 	})
 }
 
-func bindMarkToDialer(mark int, dialer *net.Dialer, _ string, _ net.IP) {
+func bindMarkToDialer(mark int, dialer *net.Dialer, _ string, _ netip.Addr) {
 	printMarkWarn()
 }
 
-func bindMarkToListenConfig(mark int, lc *net.ListenConfig, _, address string) {
+func bindMarkToListenConfig(mark int, lc *net.ListenConfig, _, _ string) {
 	printMarkWarn()
 }

component/dialer/resolver.go

@@ -3,6 +3,7 @@ package dialer
 import (
 	"context"
 	"net"
+	"net/netip"
 )
 
 func init() {
@@ -18,9 +19,9 @@ func resolverDialContext(ctx context.Context, network, address string) (net.Conn
 	interfaceName := DefaultInterface.Load()
 
 	if interfaceName != "" {
-		dstIP := net.ParseIP(address)
-		if dstIP != nil {
-			bindIfaceToDialer(interfaceName, d, network, dstIP)
+		dstIP, err := netip.ParseAddr(address)
+		if err == nil {
+			_ = bindIfaceToDialer(interfaceName, d, network, dstIP)
 		}
 	}
 

component/fakeip/cachefile.go

@@ -1,7 +1,7 @@
 package fakeip
 
 import (
-	"net"
+	"net/netip"
 
 	"github.com/Dreamacro/clash/component/profile/cachefile"
 )
@@ -11,22 +11,27 @@ type cachefileStore struct {
 }
 
 // GetByHost implements store.GetByHost
-func (c *cachefileStore) GetByHost(host string) (net.IP, bool) {
+func (c *cachefileStore) GetByHost(host string) (netip.Addr, bool) {
 	elm := c.cache.GetFakeip([]byte(host))
 	if elm == nil {
-		return nil, false
+		return netip.Addr{}, false
+	}
+
+	if len(elm) == 4 {
+		return netip.AddrFrom4(*(*[4]byte)(elm)), true
+	} else {
+		return netip.AddrFrom16(*(*[16]byte)(elm)), true
 	}
-	return net.IP(elm), true
 }
 
 // PutByHost implements store.PutByHost
-func (c *cachefileStore) PutByHost(host string, ip net.IP) {
-	c.cache.PutFakeip([]byte(host), ip)
+func (c *cachefileStore) PutByHost(host string, ip netip.Addr) {
+	c.cache.PutFakeip([]byte(host), ip.AsSlice())
 }
 
 // GetByIP implements store.GetByIP
-func (c *cachefileStore) GetByIP(ip net.IP) (string, bool) {
-	elm := c.cache.GetFakeip(ip.To4())
+func (c *cachefileStore) GetByIP(ip netip.Addr) (string, bool) {
+	elm := c.cache.GetFakeip(ip.AsSlice())
 	if elm == nil {
 		return "", false
 	}
@@ -34,18 +39,18 @@ func (c *cachefileStore) GetByIP(ip net.IP) (string, bool) {
 }
 
 // PutByIP implements store.PutByIP
-func (c *cachefileStore) PutByIP(ip net.IP, host string) {
-	c.cache.PutFakeip(ip.To4(), []byte(host))
+func (c *cachefileStore) PutByIP(ip netip.Addr, host string) {
+	c.cache.PutFakeip(ip.AsSlice(), []byte(host))
 }
 
 // DelByIP implements store.DelByIP
-func (c *cachefileStore) DelByIP(ip net.IP) {
-	ip = ip.To4()
-	c.cache.DelFakeipPair(ip, c.cache.GetFakeip(ip.To4()))
+func (c *cachefileStore) DelByIP(ip netip.Addr) {
+	addr := ip.AsSlice()
+	c.cache.DelFakeipPair(addr, c.cache.GetFakeip(addr))
 }
 
 // Exist implements store.Exist
-func (c *cachefileStore) Exist(ip net.IP) bool {
+func (c *cachefileStore) Exist(ip netip.Addr) bool {
 	_, exist := c.GetByIP(ip)
 	return exist
 }

component/fakeip/memory.go

@@ -1,40 +1,37 @@
 package fakeip
 
 import (
-	"net"
+	"net/netip"
 
 	"github.com/Dreamacro/clash/common/cache"
 )
 
 type memoryStore struct {
-	cache *cache.LruCache
+	cacheIP   *cache.LruCache[string, netip.Addr]
+	cacheHost *cache.LruCache[netip.Addr, string]
 }
 
 // GetByHost implements store.GetByHost
-func (m *memoryStore) GetByHost(host string) (net.IP, bool) {
-	if elm, exist := m.cache.Get(host); exist {
-		ip := elm.(net.IP)
-
+func (m *memoryStore) GetByHost(host string) (netip.Addr, bool) {
+	if ip, exist := m.cacheIP.Get(host); exist {
 		// ensure ip --> host on head of linked list
-		m.cache.Get(ipToUint(ip.To4()))
+		m.cacheHost.Get(ip)
 		return ip, true
 	}
 
-	return nil, false
+	return netip.Addr{}, false
 }
 
 // PutByHost implements store.PutByHost
-func (m *memoryStore) PutByHost(host string, ip net.IP) {
-	m.cache.Set(host, ip)
+func (m *memoryStore) PutByHost(host string, ip netip.Addr) {
+	m.cacheIP.Set(host, ip)
 }
 
 // GetByIP implements store.GetByIP
-func (m *memoryStore) GetByIP(ip net.IP) (string, bool) {
-	if elm, exist := m.cache.Get(ipToUint(ip.To4())); exist {
-		host := elm.(string)
-
+func (m *memoryStore) GetByIP(ip netip.Addr) (string, bool) {
+	if host, exist := m.cacheHost.Get(ip); exist {
 		// ensure host --> ip on head of linked list
-		m.cache.Get(host)
+		m.cacheIP.Get(host)
 		return host, true
 	}
 
@@ -42,33 +39,41 @@ func (m *memoryStore) GetByIP(ip net.IP) (string, bool) {
 }
 
 // PutByIP implements store.PutByIP
-func (m *memoryStore) PutByIP(ip net.IP, host string) {
-	m.cache.Set(ipToUint(ip.To4()), host)
+func (m *memoryStore) PutByIP(ip netip.Addr, host string) {
+	m.cacheHost.Set(ip, host)
 }
 
 // DelByIP implements store.DelByIP
-func (m *memoryStore) DelByIP(ip net.IP) {
-	ipNum := ipToUint(ip.To4())
-	if elm, exist := m.cache.Get(ipNum); exist {
-		m.cache.Delete(elm.(string))
+func (m *memoryStore) DelByIP(ip netip.Addr) {
+	if host, exist := m.cacheHost.Get(ip); exist {
+		m.cacheIP.Delete(host)
 	}
-	m.cache.Delete(ipNum)
+	m.cacheHost.Delete(ip)
 }
 
 // Exist implements store.Exist
-func (m *memoryStore) Exist(ip net.IP) bool {
-	return m.cache.Exist(ipToUint(ip.To4()))
+func (m *memoryStore) Exist(ip netip.Addr) bool {
+	return m.cacheHost.Exist(ip)
 }
 
 // CloneTo implements store.CloneTo
 // only for memoryStore to memoryStore
 func (m *memoryStore) CloneTo(store store) {
 	if ms, ok := store.(*memoryStore); ok {
-		m.cache.CloneTo(ms.cache)
+		m.cacheIP.CloneTo(ms.cacheIP)
+		m.cacheHost.CloneTo(ms.cacheHost)
 	}
 }
 
 // FlushFakeIP implements store.FlushFakeIP
 func (m *memoryStore) FlushFakeIP() error {
-	return m.cache.Clear()
+	_ = m.cacheIP.Clear()
+	return m.cacheHost.Clear()
+}
+
+func newMemoryStore(size int) *memoryStore {
+	return &memoryStore{
+		cacheIP:   cache.NewLRUCache[string, netip.Addr](cache.WithSize[string, netip.Addr](size)),
+		cacheHost: cache.NewLRUCache[netip.Addr, string](cache.WithSize[netip.Addr, string](size)),
+	}
 }

component/fakeip/pool.go

@@ -2,40 +2,45 @@ package fakeip
 
 import (
 	"errors"
-	"net"
+	"net/netip"
 	"sync"
 
-	"github.com/Dreamacro/clash/common/cache"
+	"github.com/Dreamacro/clash/common/nnip"
 	"github.com/Dreamacro/clash/component/profile/cachefile"
 	"github.com/Dreamacro/clash/component/trie"
 )
 
+const (
+	offsetKey = "key-offset-fake-ip"
+	cycleKey  = "key-cycle-fake-ip"
+)
+
 type store interface {
-	GetByHost(host string) (net.IP, bool)
-	PutByHost(host string, ip net.IP)
-	GetByIP(ip net.IP) (string, bool)
-	PutByIP(ip net.IP, host string)
-	DelByIP(ip net.IP)
-	Exist(ip net.IP) bool
+	GetByHost(host string) (netip.Addr, bool)
+	PutByHost(host string, ip netip.Addr)
+	GetByIP(ip netip.Addr) (string, bool)
+	PutByIP(ip netip.Addr, host string)
+	DelByIP(ip netip.Addr)
+	Exist(ip netip.Addr) bool
 	CloneTo(store)
 	FlushFakeIP() error
 }
 
 // Pool is a implementation about fake ip generator without storage
 type Pool struct {
-	max       uint32
-	min       uint32
-	gateway   uint32
-	broadcast uint32
-	offset    uint32
-	mux       sync.Mutex
-	host      *trie.DomainTrie
-	ipnet     *net.IPNet
-	store     store
+	gateway netip.Addr
+	first   netip.Addr
+	last    netip.Addr
+	offset  netip.Addr
+	cycle   bool
+	mux     sync.Mutex
+	host    *trie.DomainTrie[bool]
+	ipnet   *netip.Prefix
+	store   store
 }
 
 // Lookup return a fake ip with host
-func (p *Pool) Lookup(host string) net.IP {
+func (p *Pool) Lookup(host string) netip.Addr {
 	p.mux.Lock()
 	defer p.mux.Unlock()
 	if ip, exist := p.store.GetByHost(host); exist {
@@ -48,14 +53,10 @@ func (p *Pool) Lookup(host string) net.IP {
 }
 
 // LookBack return host with the fake ip
-func (p *Pool) LookBack(ip net.IP) (string, bool) {
+func (p *Pool) LookBack(ip netip.Addr) (string, bool) {
 	p.mux.Lock()
 	defer p.mux.Unlock()
 
-	if ip = ip.To4(); ip == nil {
-		return "", false
-	}
-
 	return p.store.GetByIP(ip)
 }
 
@@ -68,29 +69,25 @@ func (p *Pool) ShouldSkipped(domain string) bool {
 }
 
 // Exist returns if given ip exists in fake-ip pool
-func (p *Pool) Exist(ip net.IP) bool {
+func (p *Pool) Exist(ip netip.Addr) bool {
 	p.mux.Lock()
 	defer p.mux.Unlock()
 
-	if ip = ip.To4(); ip == nil {
-		return false
-	}
-
 	return p.store.Exist(ip)
 }
 
 // Gateway return gateway ip
-func (p *Pool) Gateway() net.IP {
-	return uintToIP(p.gateway)
+func (p *Pool) Gateway() netip.Addr {
+	return p.gateway
 }
 
-// Broadcast return broadcast ip
-func (p *Pool) Broadcast() net.IP {
-	return uintToIP(p.broadcast)
+// Broadcast return the last ip
+func (p *Pool) Broadcast() netip.Addr {
+	return p.last
 }
 
 // IPNet return raw ipnet
-func (p *Pool) IPNet() *net.IPNet {
+func (p *Pool) IPNet() *netip.Prefix {
 	return p.ipnet
 }
 
@@ -99,47 +96,61 @@ func (p *Pool) CloneFrom(o *Pool) {
 	o.store.CloneTo(p.store)
 }
 
-func (p *Pool) get(host string) net.IP {
-	current := p.offset
-	for {
-		p.offset = (p.offset + 1) % (p.max - p.min)
-		// Avoid infinite loops
-		if p.offset == current {
-			p.offset = (p.offset + 1) % (p.max - p.min)
-			ip := uintToIP(p.min + p.offset - 1)
-			p.store.DelByIP(ip)
-			break
-		}
+func (p *Pool) get(host string) netip.Addr {
+	p.offset = p.offset.Next()
 
-		ip := uintToIP(p.min + p.offset - 1)
-		if !p.store.Exist(ip) {
-			break
-		}
+	if !p.offset.Less(p.last) {
+		p.cycle = true
+		p.offset = p.first
 	}
-	ip := uintToIP(p.min + p.offset - 1)
-	p.store.PutByIP(ip, host)
-	return ip
+
+	if p.cycle || p.store.Exist(p.offset) {
+		p.store.DelByIP(p.offset)
+	}
+
+	p.store.PutByIP(p.offset, host)
+	return p.offset
 }
 
 func (p *Pool) FlushFakeIP() error {
-	return p.store.FlushFakeIP()
+	err := p.store.FlushFakeIP()
+	if err == nil {
+		p.cycle = false
+		p.offset = p.first.Prev()
+	}
+	return err
 }
 
-func ipToUint(ip net.IP) uint32 {
-	v := uint32(ip[0]) << 24
-	v += uint32(ip[1]) << 16
-	v += uint32(ip[2]) << 8
-	v += uint32(ip[3])
-	return v
+func (p *Pool) StoreState() {
+	if s, ok := p.store.(*cachefileStore); ok {
+		s.PutByHost(offsetKey, p.offset)
+		if p.cycle {
+			s.PutByHost(cycleKey, p.offset)
+		}
+	}
 }
 
-func uintToIP(v uint32) net.IP {
-	return net.IP{byte(v >> 24), byte(v >> 16), byte(v >> 8), byte(v)}
+func (p *Pool) restoreState() {
+	if s, ok := p.store.(*cachefileStore); ok {
+		if _, exist := s.GetByHost(cycleKey); exist {
+			p.cycle = true
+		}
+
+		if offset, exist := s.GetByHost(offsetKey); exist {
+			if p.ipnet.Contains(offset) {
+				p.offset = offset
+			} else {
+				_ = p.FlushFakeIP()
+			}
+		} else if s.Exist(p.first) {
+			_ = p.FlushFakeIP()
+		}
+	}
 }
 
 type Options struct {
-	IPNet *net.IPNet
-	Host  *trie.DomainTrie
+	IPNet *netip.Prefix
+	Host  *trie.DomainTrie[bool]
 
 	// Size sets the maximum number of entries in memory
 	// and does not work if Persistence is true
@@ -152,33 +163,35 @@ type Options struct {
 
 // New return Pool instance
 func New(options Options) (*Pool, error) {
-	min := ipToUint(options.IPNet.IP) + 3
+	var (
+		hostAddr = options.IPNet.Masked().Addr()
+		gateway  = hostAddr.Next()
+		first    = gateway.Next().Next()
+		last     = nnip.UnMasked(*options.IPNet)
+	)
 
-	ones, bits := options.IPNet.Mask.Size()
-	total := 1<<uint(bits-ones) - 4
-
-	if total <= 0 {
+	if !options.IPNet.IsValid() || !first.IsValid() || !first.Less(last) {
 		return nil, errors.New("ipnet don't have valid ip")
 	}
 
-	max := min + uint32(total) - 1
 	pool := &Pool{
-		min:       min,
-		max:       max,
-		gateway:   min - 2,
-		broadcast: max + 1,
-		host:      options.Host,
-		ipnet:     options.IPNet,
+		gateway: gateway,
+		first:   first,
+		last:    last,
+		offset:  first.Prev(),
+		cycle:   false,
+		host:    options.Host,
+		ipnet:   options.IPNet,
 	}
 	if options.Persistence {
 		pool.store = &cachefileStore{
 			cache: cachefile.Cache(),
 		}
 	} else {
-		pool.store = &memoryStore{
-			cache: cache.NewLRUCache(cache.WithSize(options.Size * 2)),
-		}
+		pool.store = newMemoryStore(options.Size)
 	}
 
+	pool.restoreState()
+
 	return pool, nil
 }

component/fakeip/pool_test.go

@@ -2,7 +2,7 @@ package fakeip
 
 import (
 	"fmt"
-	"net"
+	"net/netip"
 	"os"
 	"testing"
 	"time"
@@ -49,9 +49,9 @@ func createCachefileStore(options Options) (*Pool, string, error) {
 }
 
 func TestPool_Basic(t *testing.T) {
-	_, ipnet, _ := net.ParseCIDR("192.168.0.0/28")
+	ipnet := netip.MustParsePrefix("192.168.0.0/28")
 	pools, tempfile, err := createPools(Options{
-		IPNet: ipnet,
+		IPNet: &ipnet,
 		Size:  10,
 	})
 	assert.Nil(t, err)
@@ -62,24 +62,52 @@ func TestPool_Basic(t *testing.T) {
 		last := pool.Lookup("bar.com")
 		bar, exist := pool.LookBack(last)
 
-		assert.True(t, first.Equal(net.IP{192, 168, 0, 3}))
-		assert.Equal(t, pool.Lookup("foo.com"), net.IP{192, 168, 0, 3})
-		assert.True(t, last.Equal(net.IP{192, 168, 0, 4}))
+		assert.True(t, first == netip.AddrFrom4([4]byte{192, 168, 0, 3}))
+		assert.True(t, pool.Lookup("foo.com") == netip.AddrFrom4([4]byte{192, 168, 0, 3}))
+		assert.True(t, last == netip.AddrFrom4([4]byte{192, 168, 0, 4}))
 		assert.True(t, exist)
 		assert.Equal(t, bar, "bar.com")
-		assert.Equal(t, pool.Gateway(), net.IP{192, 168, 0, 1})
-		assert.Equal(t, pool.Broadcast(), net.IP{192, 168, 0, 15})
+		assert.True(t, pool.Gateway() == netip.AddrFrom4([4]byte{192, 168, 0, 1}))
+		assert.True(t, pool.Broadcast() == netip.AddrFrom4([4]byte{192, 168, 0, 15}))
 		assert.Equal(t, pool.IPNet().String(), ipnet.String())
-		assert.True(t, pool.Exist(net.IP{192, 168, 0, 4}))
-		assert.False(t, pool.Exist(net.IP{192, 168, 0, 5}))
-		assert.False(t, pool.Exist(net.ParseIP("::1")))
+		assert.True(t, pool.Exist(netip.AddrFrom4([4]byte{192, 168, 0, 4})))
+		assert.False(t, pool.Exist(netip.AddrFrom4([4]byte{192, 168, 0, 5})))
+		assert.False(t, pool.Exist(netip.MustParseAddr("::1")))
+	}
+}
+
+func TestPool_BasicV6(t *testing.T) {
+	ipnet := netip.MustParsePrefix("2001:4860:4860::8888/118")
+	pools, tempfile, err := createPools(Options{
+		IPNet: &ipnet,
+		Size:  10,
+	})
+	assert.Nil(t, err)
+	defer os.Remove(tempfile)
+
+	for _, pool := range pools {
+		first := pool.Lookup("foo.com")
+		last := pool.Lookup("bar.com")
+		bar, exist := pool.LookBack(last)
+
+		assert.True(t, first == netip.MustParseAddr("2001:4860:4860:0000:0000:0000:0000:8803"))
+		assert.True(t, pool.Lookup("foo.com") == netip.MustParseAddr("2001:4860:4860:0000:0000:0000:0000:8803"))
+		assert.True(t, last == netip.MustParseAddr("2001:4860:4860:0000:0000:0000:0000:8804"))
+		assert.True(t, exist)
+		assert.Equal(t, bar, "bar.com")
+		assert.True(t, pool.Gateway() == netip.MustParseAddr("2001:4860:4860:0000:0000:0000:0000:8801"))
+		assert.True(t, pool.Broadcast() == netip.MustParseAddr("2001:4860:4860:0000:0000:0000:0000:8bff"))
+		assert.Equal(t, pool.IPNet().String(), ipnet.String())
+		assert.True(t, pool.Exist(netip.MustParseAddr("2001:4860:4860:0000:0000:0000:0000:8804")))
+		assert.False(t, pool.Exist(netip.MustParseAddr("2001:4860:4860:0000:0000:0000:0000:8805")))
+		assert.False(t, pool.Exist(netip.MustParseAddr("127.0.0.1")))
 	}
 }
 
 func TestPool_CycleUsed(t *testing.T) {
-	_, ipnet, _ := net.ParseCIDR("192.168.0.16/28")
+	ipnet := netip.MustParsePrefix("192.168.0.16/28")
 	pools, tempfile, err := createPools(Options{
-		IPNet: ipnet,
+		IPNet: &ipnet,
 		Size:  10,
 	})
 	assert.Nil(t, err)
@@ -88,22 +116,22 @@ func TestPool_CycleUsed(t *testing.T) {
 	for _, pool := range pools {
 		foo := pool.Lookup("foo.com")
 		bar := pool.Lookup("bar.com")
-		for i := 0; i < 9; i++ {
+		for i := 0; i < 10; i++ {
 			pool.Lookup(fmt.Sprintf("%d.com", i))
 		}
 		baz := pool.Lookup("baz.com")
 		next := pool.Lookup("foo.com")
-		assert.True(t, foo.Equal(baz))
-		assert.True(t, next.Equal(bar))
+		assert.True(t, foo == baz)
+		assert.True(t, next == bar)
 	}
 }
 
 func TestPool_Skip(t *testing.T) {
-	_, ipnet, _ := net.ParseCIDR("192.168.0.1/29")
-	tree := trie.New()
-	tree.Insert("example.com", tree)
+	ipnet := netip.MustParsePrefix("192.168.0.1/29")
+	tree := trie.New[bool]()
+	tree.Insert("example.com", true)
 	pools, tempfile, err := createPools(Options{
-		IPNet: ipnet,
+		IPNet: &ipnet,
 		Size:  10,
 		Host:  tree,
 	})
@@ -117,9 +145,9 @@ func TestPool_Skip(t *testing.T) {
 }
 
 func TestPool_MaxCacheSize(t *testing.T) {
-	_, ipnet, _ := net.ParseCIDR("192.168.0.1/24")
+	ipnet := netip.MustParsePrefix("192.168.0.1/24")
 	pool, _ := New(Options{
-		IPNet: ipnet,
+		IPNet: &ipnet,
 		Size:  2,
 	})
 
@@ -128,13 +156,13 @@ func TestPool_MaxCacheSize(t *testing.T) {
 	pool.Lookup("baz.com")
 	next := pool.Lookup("foo.com")
 
-	assert.False(t, first.Equal(next))
+	assert.False(t, first == next)
 }
 
 func TestPool_DoubleMapping(t *testing.T) {
-	_, ipnet, _ := net.ParseCIDR("192.168.0.1/24")
+	ipnet := netip.MustParsePrefix("192.168.0.1/24")
 	pool, _ := New(Options{
-		IPNet: ipnet,
+		IPNet: &ipnet,
 		Size:  2,
 	})
 
@@ -158,23 +186,23 @@ func TestPool_DoubleMapping(t *testing.T) {
 	assert.False(t, bazExist)
 	assert.True(t, barExist)
 
-	assert.False(t, bazIP.Equal(newBazIP))
+	assert.False(t, bazIP == newBazIP)
 }
 
 func TestPool_Clone(t *testing.T) {
-	_, ipnet, _ := net.ParseCIDR("192.168.0.1/24")
+	ipnet := netip.MustParsePrefix("192.168.0.1/24")
 	pool, _ := New(Options{
-		IPNet: ipnet,
+		IPNet: &ipnet,
 		Size:  2,
 	})
 
 	first := pool.Lookup("foo.com")
 	last := pool.Lookup("bar.com")
-	assert.True(t, first.Equal(net.IP{192, 168, 0, 3}))
-	assert.True(t, last.Equal(net.IP{192, 168, 0, 4}))
+	assert.True(t, first == netip.AddrFrom4([4]byte{192, 168, 0, 3}))
+	assert.True(t, last == netip.AddrFrom4([4]byte{192, 168, 0, 4}))
 
 	newPool, _ := New(Options{
-		IPNet: ipnet,
+		IPNet: &ipnet,
 		Size:  2,
 	})
 	newPool.CloneFrom(pool)
@@ -185,9 +213,9 @@ func TestPool_Clone(t *testing.T) {
 }
 
 func TestPool_Error(t *testing.T) {
-	_, ipnet, _ := net.ParseCIDR("192.168.0.1/31")
+	ipnet := netip.MustParsePrefix("192.168.0.1/31")
 	_, err := New(Options{
-		IPNet: ipnet,
+		IPNet: &ipnet,
 		Size:  10,
 	})
 
@@ -195,9 +223,9 @@ func TestPool_Error(t *testing.T) {
 }
 
 func TestPool_FlushFileCache(t *testing.T) {
-	_, ipnet, _ := net.ParseCIDR("192.168.0.1/28")
+	ipnet := netip.MustParsePrefix("192.168.0.1/28")
 	pools, tempfile, err := createPools(Options{
-		IPNet: ipnet,
+		IPNet: &ipnet,
 		Size:  10,
 	})
 	assert.Nil(t, err)
@@ -212,22 +240,24 @@ func TestPool_FlushFileCache(t *testing.T) {
 		err = pool.FlushFakeIP()
 		assert.Nil(t, err)
 
-		baz := pool.Lookup("foo.com")
 		next := pool.Lookup("baz.com")
+		baz := pool.Lookup("foo.com")
 		nero := pool.Lookup("foo.com")
 
-		assert.Equal(t, foo, fox)
-		assert.NotEqual(t, foo, baz)
-		assert.Equal(t, bar, bax)
-		assert.NotEqual(t, bar, next)
-		assert.Equal(t, baz, nero)
+		assert.True(t, foo == fox)
+		assert.True(t, foo == next)
+		assert.False(t, foo == baz)
+		assert.True(t, bar == bax)
+		assert.True(t, bar == baz)
+		assert.False(t, bar == next)
+		assert.True(t, baz == nero)
 	}
 }
 
 func TestPool_FlushMemoryCache(t *testing.T) {
-	_, ipnet, _ := net.ParseCIDR("192.168.0.1/28")
+	ipnet := netip.MustParsePrefix("192.168.0.1/28")
 	pool, _ := New(Options{
-		IPNet: ipnet,
+		IPNet: &ipnet,
 		Size:  10,
 	})
 
@@ -239,13 +269,15 @@ func TestPool_FlushMemoryCache(t *testing.T) {
 	err := pool.FlushFakeIP()
 	assert.Nil(t, err)
 
-	baz := pool.Lookup("foo.com")
 	next := pool.Lookup("baz.com")
+	baz := pool.Lookup("foo.com")
 	nero := pool.Lookup("foo.com")
 
-	assert.Equal(t, foo, fox)
-	assert.NotEqual(t, foo, baz)
-	assert.Equal(t, bar, bax)
-	assert.NotEqual(t, bar, next)
-	assert.Equal(t, baz, nero)
+	assert.True(t, foo == fox)
+	assert.True(t, foo == next)
+	assert.False(t, foo == baz)
+	assert.True(t, bar == bax)
+	assert.True(t, bar == baz)
+	assert.False(t, bar == next)
+	assert.True(t, baz == nero)
 }

component/geodata/memconservative/cache.go

@@ -33,7 +33,7 @@ func (g GeoIPCache) Set(key string, value *router.GeoIP) {
 }
 
 func (g GeoIPCache) Unmarshal(filename, code string) (*router.GeoIP, error) {
-	asset := C.Path.GetAssetLocation(filename)
+	asset := C.Path.Resolve(filename)
 	idx := strings.ToLower(asset + ":" + code)
 	if g.Has(idx) {
 		return g.Get(idx), nil
@@ -98,7 +98,7 @@ func (g GeoSiteCache) Set(key string, value *router.GeoSite) {
 }
 
 func (g GeoSiteCache) Unmarshal(filename, code string) (*router.GeoSite, error) {
-	asset := C.Path.GetAssetLocation(filename)
+	asset := C.Path.Resolve(filename)
 	idx := strings.ToLower(asset + ":" + code)
 	if g.Has(idx) {
 		return g.Get(idx), nil

component/geodata/standard/standard.go

@@ -26,7 +26,7 @@ func ReadFile(path string) ([]byte, error) {
 }
 
 func ReadAsset(file string) ([]byte, error) {
-	return ReadFile(C.Path.GetAssetLocation(file))
+	return ReadFile(C.Path.Resolve(file))
 }
 
 func loadIP(filename, country string) ([]*router.CIDR, error) {

component/geodata/strmatcher/ac_automaton_matcher.go

@@ -1,7 +1,7 @@
 package strmatcher
 
 import (
-	"container/list"
+	"github.com/Dreamacro/clash/common/generics/list"
 )
 
 const validCharCount = 53
@@ -190,7 +190,7 @@ func (ac *ACAutomaton) Add(domain string, t Type) {
 }
 
 func (ac *ACAutomaton) Build() {
-	queue := list.New()
+	queue := list.New[Edge]()
 	for i := 0; i < validCharCount; i++ {
 		if ac.trie[0][i].nextNode != 0 {
 			queue.PushBack(ac.trie[0][i])
@@ -201,7 +201,7 @@ func (ac *ACAutomaton) Build() {
 		if front == nil {
 			break
 		} else {
-			node := front.Value.(Edge).nextNode
+			node := front.Value.nextNode
 			queue.Remove(front)
 			for i := 0; i < validCharCount; i++ {
 				if ac.trie[node][i].nextNode != 0 {

component/iface/iface.go

@@ -3,6 +3,7 @@ package iface
 import (
 	"errors"
 	"net"
+	"net/netip"
 	"time"
 
 	"github.com/Dreamacro/clash/common/singledo"
@@ -11,7 +12,7 @@ import (
 type Interface struct {
 	Index        int
 	Name         string
-	Addrs        []*net.IPNet
+	Addrs        []*netip.Prefix
 	HardwareAddr net.HardwareAddr
 }
 
@@ -20,10 +21,10 @@ var (
 	ErrAddrNotFound  = errors.New("addr not found")
 )
 
-var interfaces = singledo.NewSingle(time.Second * 20)
+var interfaces = singledo.NewSingle[map[string]*Interface](time.Second * 20)
 
 func ResolveInterface(name string) (*Interface, error) {
-	value, err, _ := interfaces.Do(func() (any, error) {
+	value, err, _ := interfaces.Do(func() (map[string]*Interface, error) {
 		ifaces, err := net.Interfaces()
 		if err != nil {
 			return nil, err
@@ -37,14 +38,18 @@ func ResolveInterface(name string) (*Interface, error) {
 				continue
 			}
 
-			ipNets := make([]*net.IPNet, 0, len(addrs))
+			ipNets := make([]*netip.Prefix, 0, len(addrs))
 			for _, addr := range addrs {
 				ipNet := addr.(*net.IPNet)
-				if v4 := ipNet.IP.To4(); v4 != nil {
-					ipNet.IP = v4
+				ip, _ := netip.AddrFromSlice(ipNet.IP)
+
+				ones, bits := ipNet.Mask.Size()
+				if bits == 32 {
+					ip = ip.Unmap()
 				}
 
-				ipNets = append(ipNets, ipNet)
+				pf := netip.PrefixFrom(ip, ones)
+				ipNets = append(ipNets, &pf)
 			}
 
 			r[iface.Name] = &Interface{
@@ -61,7 +66,7 @@ func ResolveInterface(name string) (*Interface, error) {
 		return nil, err
 	}
 
-	ifaces := value.(map[string]*Interface)
+	ifaces := value
 	iface, ok := ifaces[name]
 	if !ok {
 		return nil, ErrIfaceNotFound
@@ -74,35 +79,35 @@ 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) PickIPv4Addr(destination netip.Addr) (*netip.Prefix, error) {
+	return iface.pickIPAddr(destination, func(addr *netip.Prefix) bool {
+		return addr.Addr().Is4()
 	})
 }
 
-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) PickIPv6Addr(destination netip.Addr) (*netip.Prefix, error) {
+	return iface.pickIPAddr(destination, func(addr *netip.Prefix) bool {
+		return addr.Addr().Is6()
 	})
 }
 
-func (iface *Interface) pickIPAddr(destination net.IP, accept func(addr *net.IPNet) bool) (*net.IPNet, error) {
-	var fallback *net.IPNet
+func (iface *Interface) pickIPAddr(destination netip.Addr, accept func(addr *netip.Prefix) bool) (*netip.Prefix, error) {
+	var fallback *netip.Prefix
 
 	for _, addr := range iface.Addrs {
 		if !accept(addr) {
 			continue
 		}
 
-		if fallback == nil && !addr.IP.IsLinkLocalUnicast() {
+		if fallback == nil && !addr.Addr().IsLinkLocalUnicast() {
 			fallback = addr
 
-			if destination == nil {
+			if !destination.IsValid() {
 				break
 			}
 		}
 
-		if destination != nil && addr.Contains(destination) {
+		if destination.IsValid() && addr.Contains(destination) {
 			return addr, nil
 		}
 	}

component/pool/pool.go

@@ -6,55 +6,55 @@ import (
 	"time"
 )
 
-type Factory = func(context.Context) (any, error)
+type Factory[T any] func(context.Context) (T, error)
 
-type entry struct {
-	elm  any
+type entry[T any] struct {
+	elm  T
 	time time.Time
 }
 
-type Option func(*pool)
+type Option[T any] func(*pool[T])
 
 // WithEvict set the evict callback
-func WithEvict(cb func(any)) Option {
-	return func(p *pool) {
+func WithEvict[T any](cb func(T)) Option[T] {
+	return func(p *pool[T]) {
 		p.evict = cb
 	}
 }
 
 // WithAge defined element max age (millisecond)
-func WithAge(maxAge int64) Option {
-	return func(p *pool) {
+func WithAge[T any](maxAge int64) Option[T] {
+	return func(p *pool[T]) {
 		p.maxAge = maxAge
 	}
 }
 
 // WithSize defined max size of Pool
-func WithSize(maxSize int) Option {
-	return func(p *pool) {
-		p.ch = make(chan any, maxSize)
+func WithSize[T any](maxSize int) Option[T] {
+	return func(p *pool[T]) {
+		p.ch = make(chan *entry[T], maxSize)
 	}
 }
 
 // Pool is for GC, see New for detail
-type Pool struct {
-	*pool
+type Pool[T any] struct {
+	*pool[T]
 }
 
-type pool struct {
-	ch      chan any
-	factory Factory
-	evict   func(any)
+type pool[T any] struct {
+	ch      chan *entry[T]
+	factory Factory[T]
+	evict   func(T)
 	maxAge  int64
 }
 
-func (p *pool) GetContext(ctx context.Context) (any, error) {
+func (p *pool[T]) GetContext(ctx context.Context) (T, error) {
 	now := time.Now()
 	for {
 		select {
 		case item := <-p.ch:
-			elm := item.(*entry)
-			if p.maxAge != 0 && now.Sub(item.(*entry).time).Milliseconds() > p.maxAge {
+			elm := item
+			if p.maxAge != 0 && now.Sub(item.time).Milliseconds() > p.maxAge {
 				if p.evict != nil {
 					p.evict(elm.elm)
 				}
@@ -68,12 +68,12 @@ func (p *pool) GetContext(ctx context.Context) (any, error) {
 	}
 }
 
-func (p *pool) Get() (any, error) {
+func (p *pool[T]) Get() (T, error) {
 	return p.GetContext(context.Background())
 }
 
-func (p *pool) Put(item any) {
-	e := &entry{
+func (p *pool[T]) Put(item T) {
+	e := &entry[T]{
 		elm:  item,
 		time: time.Now(),
 	}
@@ -90,17 +90,17 @@ func (p *pool) Put(item any) {
 	}
 }
 
-func recycle(p *Pool) {
+func recycle[T any](p *Pool[T]) {
 	for item := range p.pool.ch {
 		if p.pool.evict != nil {
-			p.pool.evict(item.(*entry).elm)
+			p.pool.evict(item.elm)
 		}
 	}
 }
 
-func New(factory Factory, options ...Option) *Pool {
-	p := &pool{
-		ch:      make(chan any, 10),
+func New[T any](factory Factory[T], options ...Option[T]) *Pool[T] {
+	p := &pool[T]{
+		ch:      make(chan *entry[T], 10),
 		factory: factory,
 	}
 
@@ -108,7 +108,7 @@ func New(factory Factory, options ...Option) *Pool {
 		option(p)
 	}
 
-	P := &Pool{p}
-	runtime.SetFinalizer(P, recycle)
+	P := &Pool[T]{p}
+	runtime.SetFinalizer(P, recycle[T])
 	return P
 }

component/pool/pool_test.go

@@ -8,9 +8,9 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func lg() Factory {
+func lg() Factory[int] {
 	initial := -1
-	return func(context.Context) (any, error) {
+	return func(context.Context) (int, error) {
 		initial++
 		return initial, nil
 	}
@@ -18,23 +18,23 @@ func lg() Factory {
 
 func TestPool_Basic(t *testing.T) {
 	g := lg()
-	pool := New(g)
+	pool := New[int](g)
 
 	elm, _ := pool.Get()
-	assert.Equal(t, 0, elm.(int))
+	assert.Equal(t, 0, elm)
 	pool.Put(elm)
 	elm, _ = pool.Get()
-	assert.Equal(t, 0, elm.(int))
+	assert.Equal(t, 0, elm)
 	elm, _ = pool.Get()
-	assert.Equal(t, 1, elm.(int))
+	assert.Equal(t, 1, elm)
 }
 
 func TestPool_MaxSize(t *testing.T) {
 	g := lg()
 	size := 5
-	pool := New(g, WithSize(size))
+	pool := New[int](g, WithSize[int](size))
 
-	var items []any
+	var items []int
 
 	for i := 0; i < size; i++ {
 		item, _ := pool.Get()
@@ -42,7 +42,7 @@ func TestPool_MaxSize(t *testing.T) {
 	}
 
 	extra, _ := pool.Get()
-	assert.Equal(t, size, extra.(int))
+	assert.Equal(t, size, extra)
 
 	for _, item := range items {
 		pool.Put(item)
@@ -52,22 +52,22 @@ func TestPool_MaxSize(t *testing.T) {
 
 	for _, item := range items {
 		elm, _ := pool.Get()
-		assert.Equal(t, item.(int), elm.(int))
+		assert.Equal(t, item, elm)
 	}
 }
 
 func TestPool_MaxAge(t *testing.T) {
 	g := lg()
-	pool := New(g, WithAge(20))
+	pool := New[int](g, WithAge[int](20))
 
 	elm, _ := pool.Get()
 	pool.Put(elm)
 
 	elm, _ = pool.Get()
-	assert.Equal(t, 0, elm.(int))
+	assert.Equal(t, 0, elm)
 	pool.Put(elm)
 
 	time.Sleep(time.Millisecond * 22)
 	elm, _ = pool.Get()
-	assert.Equal(t, 1, elm.(int))
+	assert.Equal(t, 1, elm)
 }

component/process/process.go

@@ -3,7 +3,9 @@ package process
 import (
 	"errors"
 	"net"
+	"net/netip"
 
+	"github.com/Dreamacro/clash/common/nnip"
 	C "github.com/Dreamacro/clash/constant"
 )
 
@@ -18,7 +20,7 @@ const (
 	UDP = "udp"
 )
 
-func FindProcessName(network string, srcIP net.IP, srcPort int) (string, error) {
+func FindProcessName(network string, srcIP netip.Addr, srcPort int) (string, error) {
 	return findProcessName(network, srcIP, srcPort)
 }
 
@@ -27,23 +29,23 @@ func ShouldFindProcess(metadata *C.Metadata) bool {
 		return false
 	}
 	for _, ip := range localIPs {
-		if ip.Equal(metadata.SrcIP) {
+		if ip == metadata.SrcIP {
 			return true
 		}
 	}
 	return false
 }
 
-func AppendLocalIPs(ip ...net.IP) {
+func AppendLocalIPs(ip ...netip.Addr) {
 	localIPs = append(ip, localIPs...)
 }
 
-func getLocalIPs() []net.IP {
-	ips := []net.IP{net.IPv4zero, net.IPv6zero}
+func getLocalIPs() []netip.Addr {
+	ips := []netip.Addr{netip.IPv4Unspecified(), netip.IPv6Unspecified()}
 
 	netInterfaces, err := net.Interfaces()
 	if err != nil {
-		ips = append(ips, net.IPv4(127, 0, 0, 1), net.IPv6loopback)
+		ips = append(ips, netip.AddrFrom4([4]byte{127, 0, 0, 1}), nnip.IpToAddr(net.IPv6loopback))
 		return ips
 	}
 
@@ -53,7 +55,7 @@ func getLocalIPs() []net.IP {
 
 			for _, address := range adds {
 				if ipNet, ok := address.(*net.IPNet); ok {
-					ips = append(ips, ipNet.IP)
+					ips = append(ips, nnip.IpToAddr(ipNet.IP))
 				}
 			}
 		}
@@ -62,7 +64,7 @@ func getLocalIPs() []net.IP {
 	return ips
 }
 
-var localIPs []net.IP
+var localIPs []netip.Addr
 
 func init() {
 	localIPs = getLocalIPs()

component/process/process_darwin.go

@@ -2,10 +2,12 @@ package process
 
 import (
 	"encoding/binary"
-	"net"
+	"net/netip"
 	"syscall"
 	"unsafe"
 
+	"github.com/Dreamacro/clash/common/nnip"
+
 	"golang.org/x/sys/unix"
 )
 
@@ -15,7 +17,7 @@ const (
 	proccallnumpidinfo  = 0x2
 )
 
-func findProcessName(network string, ip net.IP, port int) (string, error) {
+func findProcessName(network string, ip netip.Addr, port int) (string, error) {
 	var spath string
 	switch network {
 	case TCP:
@@ -26,7 +28,7 @@ func findProcessName(network string, ip net.IP, port int) (string, error) {
 		return "", ErrInvalidNetwork
 	}
 
-	isIPv4 := ip.To4() != nil
+	isIPv4 := ip.Is4()
 
 	value, err := syscall.Sysctl(spath)
 	if err != nil {
@@ -57,19 +59,19 @@ func findProcessName(network string, ip net.IP, port int) (string, error) {
 		// xinpcb_n.inp_vflag
 		flag := buf[inp+44]
 
-		var srcIP net.IP
+		var srcIP netip.Addr
 		switch {
 		case flag&0x1 > 0 && isIPv4:
 			// ipv4
-			srcIP = net.IP(buf[inp+76 : inp+80])
+			srcIP = nnip.IpToAddr(buf[inp+76 : inp+80])
 		case flag&0x2 > 0 && !isIPv4:
 			// ipv6
-			srcIP = net.IP(buf[inp+64 : inp+80])
+			srcIP = nnip.IpToAddr(buf[inp+64 : inp+80])
 		default:
 			continue
 		}
 
-		if !ip.Equal(srcIP) && (network == TCP || !srcIP.IsUnspecified()) {
+		if ip != srcIP && (network == TCP || !srcIP.IsUnspecified()) {
 			continue
 		}
 

component/process/process_freebsd_amd64.go

@@ -3,13 +3,14 @@ package process
 import (
 	"encoding/binary"
 	"fmt"
-	"net"
+	"net/netip"
 	"strconv"
 	"strings"
 	"sync"
 	"syscall"
 	"unsafe"
 
+	"github.com/Dreamacro/clash/common/nnip"
 	"github.com/Dreamacro/clash/log"
 )
 
@@ -20,7 +21,7 @@ var (
 	once sync.Once
 )
 
-func findProcessName(network string, ip net.IP, srcPort int) (string, error) {
+func findProcessName(network string, ip netip.Addr, srcPort int) (string, error) {
 	once.Do(func() {
 		if err := initSearcher(); err != nil {
 			log.Errorln("Initialize PROCESS-NAME failed: %s", err.Error())
@@ -102,7 +103,7 @@ type searcher struct {
 	pid          int
 }
 
-func (s *searcher) Search(buf []byte, ip net.IP, port uint16, isTCP bool) (uint32, error) {
+func (s *searcher) Search(buf []byte, ip netip.Addr, port uint16, isTCP bool) (uint32, error) {
 	var itemSize int
 	var inpOffset int
 
@@ -116,7 +117,7 @@ func (s *searcher) Search(buf []byte, ip net.IP, port uint16, isTCP bool) (uint3
 		inpOffset = s.udpInpOffset
 	}
 
-	isIPv4 := ip.To4() != nil
+	isIPv4 := ip.Is4()
 	// skip the first xinpgen block
 	for i := s.headSize; i+itemSize <= len(buf); i += itemSize {
 		inp := i + inpOffset
@@ -130,19 +131,19 @@ func (s *searcher) Search(buf []byte, ip net.IP, port uint16, isTCP bool) (uint3
 		// xinpcb.inp_vflag
 		flag := buf[inp+s.vflag]
 
-		var srcIP net.IP
+		var srcIP netip.Addr
 		switch {
 		case flag&0x1 > 0 && isIPv4:
 			// ipv4
-			srcIP = net.IP(buf[inp+s.ip : inp+s.ip+4])
+			srcIP = nnip.IpToAddr(buf[inp+s.ip : inp+s.ip+4])
 		case flag&0x2 > 0 && !isIPv4:
 			// ipv6
-			srcIP = net.IP(buf[inp+s.ip-12 : inp+s.ip+4])
+			srcIP = nnip.IpToAddr(buf[inp+s.ip-12 : inp+s.ip+4])
 		default:
 			continue
 		}
 
-		if !ip.Equal(srcIP) {
+		if ip != srcIP {
 			continue
 		}
 

component/process/process_linux.go

@@ -5,6 +5,7 @@ import (
 	"encoding/binary"
 	"fmt"
 	"net"
+	"net/netip"
 	"os"
 	"path"
 	"strings"
@@ -31,7 +32,7 @@ const (
 	pathProc                = "/proc"
 )
 
-func findProcessName(network string, ip net.IP, srcPort int) (string, error) {
+func findProcessName(network string, ip netip.Addr, srcPort int) (string, error) {
 	inode, uid, err := resolveSocketByNetlink(network, ip, srcPort)
 	if err != nil {
 		return "", err
@@ -40,7 +41,7 @@ func findProcessName(network string, ip net.IP, srcPort int) (string, error) {
 	return resolveProcessNameByProcSearch(inode, uid)
 }
 
-func resolveSocketByNetlink(network string, ip net.IP, srcPort int) (int32, int32, error) {
+func resolveSocketByNetlink(network string, ip netip.Addr, srcPort int) (int32, int32, error) {
 	var family byte
 	var protocol byte
 
@@ -53,7 +54,7 @@ func resolveSocketByNetlink(network string, ip net.IP, srcPort int) (int32, int3
 		return 0, 0, ErrInvalidNetwork
 	}
 
-	if ip.To4() != nil {
+	if ip.Is4() {
 		family = syscall.AF_INET
 	} else {
 		family = syscall.AF_INET6
@@ -65,10 +66,12 @@ func resolveSocketByNetlink(network string, ip net.IP, srcPort int) (int32, int3
 	if err != nil {
 		return 0, 0, fmt.Errorf("dial netlink: %w", err)
 	}
-	defer syscall.Close(socket)
+	defer func() {
+		_ = syscall.Close(socket)
+	}()
 
-	syscall.SetsockoptTimeval(socket, syscall.SOL_SOCKET, syscall.SO_SNDTIMEO, &syscall.Timeval{Usec: 100})
-	syscall.SetsockoptTimeval(socket, syscall.SOL_SOCKET, syscall.SO_RCVTIMEO, &syscall.Timeval{Usec: 100})
+	_ = syscall.SetsockoptTimeval(socket, syscall.SOL_SOCKET, syscall.SO_SNDTIMEO, &syscall.Timeval{Usec: 100})
+	_ = syscall.SetsockoptTimeval(socket, syscall.SOL_SOCKET, syscall.SO_RCVTIMEO, &syscall.Timeval{Usec: 100})
 
 	if err := syscall.Connect(socket, &syscall.SockaddrNetlink{
 		Family: syscall.AF_NETLINK,
@@ -84,7 +87,9 @@ func resolveSocketByNetlink(network string, ip net.IP, srcPort int) (int32, int3
 	}
 
 	rb := pool.Get(pool.RelayBufferSize)
-	defer pool.Put(rb)
+	defer func() {
+		_ = pool.Put(rb)
+	}()
 
 	n, err := syscall.Read(socket, rb)
 	if err != nil {
@@ -111,14 +116,10 @@ func resolveSocketByNetlink(network string, ip net.IP, srcPort int) (int32, int3
 	return inode, uid, nil
 }
 
-func packSocketDiagRequest(family, protocol byte, source net.IP, sourcePort uint16) []byte {
+func packSocketDiagRequest(family, protocol byte, source netip.Addr, sourcePort uint16) []byte {
 	s := make([]byte, 16)
 
-	if v4 := source.To4(); v4 != nil {
-		copy(s, v4)
-	} else {
-		copy(s, source)
-	}
+	copy(s, source.AsSlice())
 
 	buf := make([]byte, sizeOfSocketDiagRequest)
 

component/process/process_other.go

@@ -2,8 +2,8 @@
 
 package process
 
-import "net"
+import "net/netip"
 
-func findProcessName(network string, ip net.IP, srcPort int) (string, error) {
+func findProcessName(network string, ip netip.Addr, srcPort int) (string, error) {
 	return "", ErrPlatformNotSupport
 }

component/process/process_windows.go

@@ -2,11 +2,12 @@ package process
 
 import (
 	"fmt"
-	"net"
+	"net/netip"
 	"sync"
 	"syscall"
 	"unsafe"
 
+	"github.com/Dreamacro/clash/common/nnip"
 	"github.com/Dreamacro/clash/log"
 
 	"golang.org/x/sys/windows"
@@ -57,7 +58,7 @@ func initWin32API() error {
 	return nil
 }
 
-func findProcessName(network string, ip net.IP, srcPort int) (string, error) {
+func findProcessName(network string, ip netip.Addr, srcPort int) (string, error) {
 	once.Do(func() {
 		err := initWin32API()
 		if err != nil {
@@ -67,7 +68,7 @@ func findProcessName(network string, ip net.IP, srcPort int) (string, error) {
 		}
 	})
 	family := windows.AF_INET
-	if ip.To4() == nil {
+	if ip.Is6() {
 		family = windows.AF_INET6
 	}
 
@@ -107,7 +108,7 @@ type searcher struct {
 	tcpState int
 }
 
-func (s *searcher) Search(b []byte, ip net.IP, port uint16) (uint32, error) {
+func (s *searcher) Search(b []byte, ip netip.Addr, port uint16) (uint32, error) {
 	n := int(readNativeUint32(b[:4]))
 	itemSize := s.itemSize
 	for i := 0; i < n; i++ {
@@ -131,9 +132,9 @@ func (s *searcher) Search(b []byte, ip net.IP, port uint16) (uint32, error) {
 			continue
 		}
 
-		srcIP := net.IP(row[s.ip : s.ip+s.ipSize])
+		srcIP := nnip.IpToAddr(row[s.ip : s.ip+s.ipSize])
 		// windows binds an unbound udp socket to 0.0.0.0/[::] while first sendto
-		if !ip.Equal(srcIP) && (!srcIP.IsUnspecified() || s.tcpState != -1) {
+		if ip != srcIP && (!srcIP.IsUnspecified() || s.tcpState != -1) {
 			continue
 		}
 
@@ -174,7 +175,7 @@ func newSearcher(isV4, isTCP bool) *searcher {
 func getTransportTable(fn uintptr, family int, class int) ([]byte, error) {
 	for size, buf := uint32(8), make([]byte, 8); ; {
 		ptr := unsafe.Pointer(&buf[0])
-		err, _, _ := syscall.Syscall6(fn, 6, uintptr(ptr), uintptr(unsafe.Pointer(&size)), 0, uintptr(family), uintptr(class), 0)
+		err, _, _ := syscall.SyscallN(fn, uintptr(ptr), uintptr(unsafe.Pointer(&size)), 0, uintptr(family), uintptr(class), 0)
 
 		switch err {
 		case 0:
@@ -209,13 +210,13 @@ func getExecPathFromPID(pid uint32) (string, error) {
 
 	buf := make([]uint16, syscall.MAX_LONG_PATH)
 	size := uint32(len(buf))
-	r1, _, err := syscall.Syscall6(
-		queryProcName, 4,
+	r1, _, err := syscall.SyscallN(
+		queryProcName,
 		uintptr(h),
 		uintptr(1),
 		uintptr(unsafe.Pointer(&buf[0])),
 		uintptr(unsafe.Pointer(&size)),
-		0, 0)
+	)
 	if r1 == 0 {
 		return "", err
 	}

component/resolver/defaults.go

@@ -0,0 +1,12 @@
+//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
+
+package resolver
+
+import _ "unsafe"
+
+//go:linkname defaultNS net.defaultNS
+var defaultNS []string
+
+func init() {
+	defaultNS = []string{"114.114.114.114:53", "8.8.8.8:53"}
+}

component/resolver/enhancer.go

@@ -1,20 +1,19 @@
 package resolver
 
-import (
-	"net"
-)
+import "net/netip"
 
 var DefaultHostMapper Enhancer
 
 type Enhancer interface {
 	FakeIPEnabled() bool
 	MappingEnabled() bool
-	IsFakeIP(net.IP) bool
-	IsFakeBroadcastIP(net.IP) bool
-	IsExistFakeIP(net.IP) bool
-	FindHostByIP(net.IP) (string, bool)
+	IsFakeIP(netip.Addr) bool
+	IsFakeBroadcastIP(netip.Addr) bool
+	IsExistFakeIP(netip.Addr) bool
+	FindHostByIP(netip.Addr) (string, bool)
 	FlushFakeIP() error
-	InsertHostByIP(net.IP, string)
+	InsertHostByIP(netip.Addr, string)
+	StoreFakePoolState()
 }
 
 func FakeIPEnabled() bool {
@@ -33,7 +32,7 @@ func MappingEnabled() bool {
 	return false
 }
 
-func IsFakeIP(ip net.IP) bool {
+func IsFakeIP(ip netip.Addr) bool {
 	if mapper := DefaultHostMapper; mapper != nil {
 		return mapper.IsFakeIP(ip)
 	}
@@ -41,7 +40,7 @@ func IsFakeIP(ip net.IP) bool {
 	return false
 }
 
-func IsFakeBroadcastIP(ip net.IP) bool {
+func IsFakeBroadcastIP(ip netip.Addr) bool {
 	if mapper := DefaultHostMapper; mapper != nil {
 		return mapper.IsFakeBroadcastIP(ip)
 	}
@@ -49,7 +48,7 @@ func IsFakeBroadcastIP(ip net.IP) bool {
 	return false
 }
 
-func IsExistFakeIP(ip net.IP) bool {
+func IsExistFakeIP(ip netip.Addr) bool {
 	if mapper := DefaultHostMapper; mapper != nil {
 		return mapper.IsExistFakeIP(ip)
 	}
@@ -57,13 +56,13 @@ func IsExistFakeIP(ip net.IP) bool {
 	return false
 }
 
-func InsertHostByIP(ip net.IP, host string) {
+func InsertHostByIP(ip netip.Addr, host string) {
 	if mapper := DefaultHostMapper; mapper != nil {
 		mapper.InsertHostByIP(ip, host)
 	}
 }
 
-func FindHostByIP(ip net.IP) (string, bool) {
+func FindHostByIP(ip netip.Addr) (string, bool) {
 	if mapper := DefaultHostMapper; mapper != nil {
 		return mapper.FindHostByIP(ip)
 	}
@@ -77,3 +76,9 @@ func FlushFakeIP() error {
 	}
 	return nil
 }
+
+func StoreFakePoolState() {
+	if mapper := DefaultHostMapper; mapper != nil {
+		mapper.StoreFakePoolState()
+	}
+}

component/resolver/resolver.go

@@ -5,9 +5,10 @@ import (
 	"errors"
 	"math/rand"
 	"net"
-	"strings"
+	"net/netip"
 	"time"
 
+	"github.com/Dreamacro/clash/common/nnip"
 	"github.com/Dreamacro/clash/component/trie"
 )
 
@@ -23,7 +24,7 @@ var (
 	DisableIPv6 = true
 
 	// DefaultHosts aim to resolve hosts
-	DefaultHosts = trie.New()
+	DefaultHosts = trie.New[netip.Addr]()
 
 	// DefaultDNSTimeout defined the default dns request timeout
 	DefaultDNSTimeout = time.Second * 5
@@ -36,29 +37,29 @@ var (
 )
 
 type Resolver interface {
-	ResolveIP(host string) (ip net.IP, err error)
-	ResolveIPv4(host string) (ip net.IP, err error)
-	ResolveIPv6(host string) (ip net.IP, err error)
+	ResolveIP(host string) (ip netip.Addr, err error)
+	ResolveIPv4(host string) (ip netip.Addr, err error)
+	ResolveIPv6(host string) (ip netip.Addr, err error)
 }
 
 // ResolveIPv4 with a host, return ipv4
-func ResolveIPv4(host string) (net.IP, error) {
+func ResolveIPv4(host string) (netip.Addr, error) {
 	return ResolveIPv4WithResolver(host, DefaultResolver)
 }
 
-func ResolveIPv4WithResolver(host string, r Resolver) (net.IP, error) {
+func ResolveIPv4WithResolver(host string, r Resolver) (netip.Addr, error) {
 	if node := DefaultHosts.Search(host); node != nil {
-		if ip := node.Data.(net.IP).To4(); ip != nil {
+		if ip := node.Data; ip.Is4() {
 			return ip, nil
 		}
 	}
 
-	ip := net.ParseIP(host)
-	if ip != nil {
-		if !strings.Contains(host, ":") {
+	ip, err := netip.ParseAddr(host)
+	if err == nil {
+		if ip.Is4() {
 			return ip, nil
 		}
-		return nil, ErrIPVersion
+		return netip.Addr{}, ErrIPVersion
 	}
 
 	if r != nil {
@@ -70,39 +71,44 @@ func ResolveIPv4WithResolver(host string, r Resolver) (net.IP, error) {
 		defer cancel()
 		ipAddrs, err := net.DefaultResolver.LookupIP(ctx, "ip4", host)
 		if err != nil {
-			return nil, err
+			return netip.Addr{}, err
 		} else if len(ipAddrs) == 0 {
-			return nil, ErrIPNotFound
+			return netip.Addr{}, ErrIPNotFound
 		}
 
-		return ipAddrs[rand.Intn(len(ipAddrs))], nil
+		ip := ipAddrs[rand.Intn(len(ipAddrs))].To4()
+		if ip == nil {
+			return netip.Addr{}, ErrIPVersion
+		}
+
+		return netip.AddrFrom4(*(*[4]byte)(ip)), nil
 	}
 
-	return nil, ErrIPNotFound
+	return netip.Addr{}, ErrIPNotFound
 }
 
 // ResolveIPv6 with a host, return ipv6
-func ResolveIPv6(host string) (net.IP, error) {
+func ResolveIPv6(host string) (netip.Addr, error) {
 	return ResolveIPv6WithResolver(host, DefaultResolver)
 }
 
-func ResolveIPv6WithResolver(host string, r Resolver) (net.IP, error) {
+func ResolveIPv6WithResolver(host string, r Resolver) (netip.Addr, error) {
 	if DisableIPv6 {
-		return nil, ErrIPv6Disabled
+		return netip.Addr{}, ErrIPv6Disabled
 	}
 
 	if node := DefaultHosts.Search(host); node != nil {
-		if ip := node.Data.(net.IP).To16(); ip != nil {
+		if ip := node.Data; ip.Is6() {
 			return ip, nil
 		}
 	}
 
-	ip := net.ParseIP(host)
-	if ip != nil {
-		if strings.Contains(host, ":") {
+	ip, err := netip.ParseAddr(host)
+	if err == nil {
+		if ip.Is6() {
 			return ip, nil
 		}
-		return nil, ErrIPVersion
+		return netip.Addr{}, ErrIPVersion
 	}
 
 	if r != nil {
@@ -114,21 +120,21 @@ func ResolveIPv6WithResolver(host string, r Resolver) (net.IP, error) {
 		defer cancel()
 		ipAddrs, err := net.DefaultResolver.LookupIP(ctx, "ip6", host)
 		if err != nil {
-			return nil, err
+			return netip.Addr{}, err
 		} else if len(ipAddrs) == 0 {
-			return nil, ErrIPNotFound
+			return netip.Addr{}, ErrIPNotFound
 		}
 
-		return ipAddrs[rand.Intn(len(ipAddrs))], nil
+		return netip.AddrFrom16(*(*[16]byte)(ipAddrs[rand.Intn(len(ipAddrs))])), nil
 	}
 
-	return nil, ErrIPNotFound
+	return netip.Addr{}, ErrIPNotFound
 }
 
 // ResolveIPWithResolver same as ResolveIP, but with a resolver
-func ResolveIPWithResolver(host string, r Resolver) (net.IP, error) {
+func ResolveIPWithResolver(host string, r Resolver) (netip.Addr, error) {
 	if node := DefaultHosts.Search(host); node != nil {
-		return node.Data.(net.IP), nil
+		return node.Data, nil
 	}
 
 	if r != nil {
@@ -140,30 +146,30 @@ func ResolveIPWithResolver(host string, r Resolver) (net.IP, error) {
 		return ResolveIPv4(host)
 	}
 
-	ip := net.ParseIP(host)
-	if ip != nil {
+	ip, err := netip.ParseAddr(host)
+	if err == nil {
 		return ip, nil
 	}
 
 	if DefaultResolver == nil {
 		ipAddr, err := net.ResolveIPAddr("ip", host)
 		if err != nil {
-			return nil, err
+			return netip.Addr{}, err
 		}
 
-		return ipAddr.IP, nil
+		return nnip.IpToAddr(ipAddr.IP), nil
 	}
 
-	return nil, ErrIPNotFound
+	return netip.Addr{}, ErrIPNotFound
 }
 
 // ResolveIP with a host, return ip
-func ResolveIP(host string) (net.IP, error) {
+func ResolveIP(host string) (netip.Addr, error) {
 	return ResolveIPWithResolver(host, DefaultResolver)
 }
 
 // ResolveIPv4ProxyServerHost proxies server host only
-func ResolveIPv4ProxyServerHost(host string) (net.IP, error) {
+func ResolveIPv4ProxyServerHost(host string) (netip.Addr, error) {
 	if ProxyServerHostResolver != nil {
 		return ResolveIPv4WithResolver(host, ProxyServerHostResolver)
 	}
@@ -171,7 +177,7 @@ func ResolveIPv4ProxyServerHost(host string) (net.IP, error) {
 }
 
 // ResolveIPv6ProxyServerHost proxies server host only
-func ResolveIPv6ProxyServerHost(host string) (net.IP, error) {
+func ResolveIPv6ProxyServerHost(host string) (netip.Addr, error) {
 	if ProxyServerHostResolver != nil {
 		return ResolveIPv6WithResolver(host, ProxyServerHostResolver)
 	}
@@ -179,7 +185,7 @@ func ResolveIPv6ProxyServerHost(host string) (net.IP, error) {
 }
 
 // ResolveProxyServerHost proxies server host only
-func ResolveProxyServerHost(host string) (net.IP, error) {
+func ResolveProxyServerHost(host string) (netip.Addr, error) {
 	if ProxyServerHostResolver != nil {
 		return ResolveIPWithResolver(host, ProxyServerHostResolver)
 	}

component/trie/domain.go

@@ -17,8 +17,8 @@ var ErrInvalidDomain = errors.New("invalid domain")
 
 // DomainTrie contains the main logic for adding and searching nodes for domain segments.
 // support wildcard domain (e.g *.google.com)
-type DomainTrie struct {
-	root *Node
+type DomainTrie[T comparable] struct {
+	root *Node[T]
 }
 
 func ValidAndSplitDomain(domain string) ([]string, bool) {
@@ -51,7 +51,7 @@ func ValidAndSplitDomain(domain string) ([]string, bool) {
 // 3. subdomain.*.example.com
 // 4. .example.com
 // 5. +.example.com
-func (t *DomainTrie) Insert(domain string, data any) error {
+func (t *DomainTrie[T]) Insert(domain string, data T) error {
 	parts, valid := ValidAndSplitDomain(domain)
 	if !valid {
 		return ErrInvalidDomain
@@ -68,13 +68,13 @@ func (t *DomainTrie) Insert(domain string, data any) error {
 	return nil
 }
 
-func (t *DomainTrie) insert(parts []string, data any) {
+func (t *DomainTrie[T]) insert(parts []string, data T) {
 	node := t.root
 	// reverse storage domain part to save space
 	for i := len(parts) - 1; i >= 0; i-- {
 		part := parts[i]
 		if !node.hasChild(part) {
-			node.addChild(part, newNode(nil))
+			node.addChild(part, newNode(getZero[T]()))
 		}
 
 		node = node.getChild(part)
@@ -88,7 +88,7 @@ func (t *DomainTrie) insert(parts []string, data any) {
 // 1. static part
 // 2. wildcard domain
 // 2. dot wildcard domain
-func (t *DomainTrie) Search(domain string) *Node {
+func (t *DomainTrie[T]) Search(domain string) *Node[T] {
 	parts, valid := ValidAndSplitDomain(domain)
 	if !valid || parts[0] == "" {
 		return nil
@@ -96,26 +96,26 @@ func (t *DomainTrie) Search(domain string) *Node {
 
 	n := t.search(t.root, parts)
 
-	if n == nil || n.Data == nil {
+	if n == nil || n.Data == getZero[T]() {
 		return nil
 	}
 
 	return n
 }
 
-func (t *DomainTrie) search(node *Node, parts []string) *Node {
+func (t *DomainTrie[T]) search(node *Node[T], parts []string) *Node[T] {
 	if len(parts) == 0 {
 		return node
 	}
 
 	if c := node.getChild(parts[len(parts)-1]); c != nil {
-		if n := t.search(c, parts[:len(parts)-1]); n != nil && n.Data != nil {
+		if n := t.search(c, parts[:len(parts)-1]); n != nil && n.Data != getZero[T]() {
 			return n
 		}
 	}
 
 	if c := node.getChild(wildcard); c != nil {
-		if n := t.search(c, parts[:len(parts)-1]); n != nil && n.Data != nil {
+		if n := t.search(c, parts[:len(parts)-1]); n != nil && n.Data != getZero[T]() {
 			return n
 		}
 	}
@@ -124,6 +124,6 @@ func (t *DomainTrie) search(node *Node, parts []string) *Node {
 }
 
 // New returns a new, empty Trie.
-func New() *DomainTrie {
-	return &DomainTrie{root: newNode(nil)}
+func New[T comparable]() *DomainTrie[T] {
+	return &DomainTrie[T]{root: newNode[T](getZero[T]())}
 }

component/trie/domain_test.go

@@ -1,16 +1,16 @@
 package trie
 
 import (
-	"net"
+	"net/netip"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
 )
 
-var localIP = net.IP{127, 0, 0, 1}
+var localIP = netip.AddrFrom4([4]byte{127, 0, 0, 1})
 
 func TestTrie_Basic(t *testing.T) {
-	tree := New()
+	tree := New[netip.Addr]()
 	domains := []string{
 		"example.com",
 		"google.com",
@@ -23,7 +23,7 @@ func TestTrie_Basic(t *testing.T) {
 
 	node := tree.Search("example.com")
 	assert.NotNil(t, node)
-	assert.True(t, node.Data.(net.IP).Equal(localIP))
+	assert.True(t, node.Data == localIP)
 	assert.NotNil(t, tree.Insert("", localIP))
 	assert.Nil(t, tree.Search(""))
 	assert.NotNil(t, tree.Search("localhost"))
@@ -31,7 +31,7 @@ func TestTrie_Basic(t *testing.T) {
 }
 
 func TestTrie_Wildcard(t *testing.T) {
-	tree := New()
+	tree := New[netip.Addr]()
 	domains := []string{
 		"*.example.com",
 		"sub.*.example.com",
@@ -64,7 +64,7 @@ func TestTrie_Wildcard(t *testing.T) {
 }
 
 func TestTrie_Priority(t *testing.T) {
-	tree := New()
+	tree := New[int]()
 	domains := []string{
 		".dev",
 		"example.dev",
@@ -79,18 +79,18 @@ func TestTrie_Priority(t *testing.T) {
 	}
 
 	for idx, domain := range domains {
-		tree.Insert(domain, idx)
+		tree.Insert(domain, idx+1)
 	}
 
-	assertFn("test.dev", 0)
-	assertFn("foo.bar.dev", 0)
-	assertFn("example.dev", 1)
-	assertFn("foo.example.dev", 2)
-	assertFn("test.example.dev", 3)
+	assertFn("test.dev", 1)
+	assertFn("foo.bar.dev", 1)
+	assertFn("example.dev", 2)
+	assertFn("foo.example.dev", 3)
+	assertFn("test.example.dev", 4)
 }
 
 func TestTrie_Boundary(t *testing.T) {
-	tree := New()
+	tree := New[netip.Addr]()
 	tree.Insert("*.dev", localIP)
 
 	assert.NotNil(t, tree.Insert(".", localIP))
@@ -99,7 +99,7 @@ func TestTrie_Boundary(t *testing.T) {
 }
 
 func TestTrie_WildcardBoundary(t *testing.T) {
-	tree := New()
+	tree := New[netip.Addr]()
 	tree.Insert("+.*", localIP)
 	tree.Insert("stun.*.*.*", localIP)
 

component/trie/node.go

@@ -1,26 +1,31 @@
 package trie
 
 // Node is the trie's node
-type Node struct {
-	children map[string]*Node
-	Data     any
+type Node[T comparable] struct {
+	children map[string]*Node[T]
+	Data     T
 }
 
-func (n *Node) getChild(s string) *Node {
+func (n *Node[T]) getChild(s string) *Node[T] {
 	return n.children[s]
 }
 
-func (n *Node) hasChild(s string) bool {
+func (n *Node[T]) hasChild(s string) bool {
 	return n.getChild(s) != nil
 }
 
-func (n *Node) addChild(s string, child *Node) {
+func (n *Node[T]) addChild(s string, child *Node[T]) {
 	n.children[s] = child
 }
 
-func newNode(data any) *Node {
-	return &Node{
+func newNode[T comparable](data T) *Node[T] {
+	return &Node[T]{
 		Data:     data,
-		children: map[string]*Node{},
+		children: map[string]*Node[T]{},
 	}
 }
+
+func getZero[T comparable]() T {
+	var result T
+	return result
+}

config/config.go

@@ -25,10 +25,11 @@ import (
 	"github.com/Dreamacro/clash/dns"
 	"github.com/Dreamacro/clash/listener/tun/ipstack/commons"
 	"github.com/Dreamacro/clash/log"
+	rewrites "github.com/Dreamacro/clash/rewrite"
 	R "github.com/Dreamacro/clash/rule"
 	T "github.com/Dreamacro/clash/tunnel"
 
-	"gopkg.in/yaml.v2"
+	"gopkg.in/yaml.v3"
 )
 
 // General config
@@ -38,8 +39,10 @@ type General struct {
 	Mode        T.TunnelMode `json:"mode"`
 	LogLevel    log.LogLevel `json:"log-level"`
 	IPv6        bool         `json:"ipv6"`
+	Sniffing    bool         `json:"sniffing"`
 	Interface   string       `json:"-"`
 	RoutingMark int          `json:"-"`
+	Tun         Tun          `json:"tun"`
 }
 
 // Inbound config
@@ -49,6 +52,7 @@ type Inbound struct {
 	RedirPort      int      `json:"redir-port"`
 	TProxyPort     int      `json:"tproxy-port"`
 	MixedPort      int      `json:"mixed-port"`
+	MitmPort       int      `json:"mitm-port"`
 	Authentication []string `json:"authentication"`
 	AllowLan       bool     `json:"allow-lan"`
 	BindAddress    string   `json:"bind-address"`
@@ -72,7 +76,7 @@ type DNS struct {
 	EnhancedMode          C.DNSMode        `yaml:"enhanced-mode"`
 	DefaultNameserver     []dns.NameServer `yaml:"default-nameserver"`
 	FakeIPRange           *fakeip.Pool
-	Hosts                 *trie.DomainTrie
+	Hosts                 *trie.DomainTrie[netip.Addr]
 	NameServerPolicy      map[string]dns.NameServer
 	ProxyServerNameserver []dns.NameServer
 }
@@ -81,7 +85,7 @@ type DNS struct {
 type FallbackFilter struct {
 	GeoIP     bool                    `yaml:"geoip"`
 	GeoIPCode string                  `yaml:"geoip-code"`
-	IPCIDR    []*net.IPNet            `yaml:"ipcidr"`
+	IPCIDR    []*netip.Prefix         `yaml:"ipcidr"`
 	Domain    []string                `yaml:"domain"`
 	GeoSite   []*router.DomainMatcher `yaml:"geosite"`
 }
@@ -94,11 +98,12 @@ type Profile struct {
 
 // Tun config
 type Tun struct {
-	Enable    bool             `yaml:"enable" json:"enable"`
-	Device    string           `yaml:"device" json:"device"`
-	Stack     C.TUNStack       `yaml:"stack" json:"stack"`
-	DNSHijack []netip.AddrPort `yaml:"dns-hijack" json:"dns-hijack"`
-	AutoRoute bool             `yaml:"auto-route" json:"auto-route"`
+	Enable              bool       `yaml:"enable" json:"enable"`
+	Device              string     `yaml:"device" json:"device"`
+	Stack               C.TUNStack `yaml:"stack" json:"stack"`
+	DNSHijack           []C.DNSUrl `yaml:"dns-hijack" json:"dns-hijack"`
+	AutoRoute           bool       `yaml:"auto-route" json:"auto-route"`
+	AutoDetectInterface bool       `yaml:"auto-detect-interface" json:"auto-detect-interface"`
 }
 
 // IPTables config
@@ -107,17 +112,23 @@ type IPTables struct {
 	InboundInterface string `yaml:"inbound-interface" json:"inbound-interface"`
 }
 
+// Mitm config
+type Mitm struct {
+	Hosts *trie.DomainTrie[bool] `yaml:"hosts" json:"hosts"`
+	Rules C.RewriteRule          `yaml:"rules" json:"rules"`
+}
+
 // Experimental config
 type Experimental struct{}
 
 // Config is clash config manager
 type Config struct {
 	General      *General
-	Tun          *Tun
 	IPTables     *IPTables
+	Mitm         *Mitm
 	DNS          *DNS
 	Experimental *Experimental
-	Hosts        *trie.DomainTrie
+	Hosts        *trie.DomainTrie[netip.Addr]
 	Profile      *Profile
 	Rules        []C.Rule
 	Users        []auth.AuthUser
@@ -149,12 +160,9 @@ type RawFallbackFilter struct {
 	GeoSite   []string `yaml:"geosite"`
 }
 
-type RawTun struct {
-	Enable    bool       `yaml:"enable" json:"enable"`
-	Device    string     `yaml:"device" json:"device"`
-	Stack     C.TUNStack `yaml:"stack" json:"stack"`
-	DNSHijack []string   `yaml:"dns-hijack" json:"dns-hijack"`
-	AutoRoute bool       `yaml:"auto-route" json:"auto-route"`
+type RawMitm struct {
+	Hosts []string `yaml:"hosts" json:"hosts"`
+	Rules []string `yaml:"rules" json:"rules"`
 }
 
 type RawConfig struct {
@@ -163,6 +171,7 @@ type RawConfig struct {
 	RedirPort          int          `yaml:"redir-port"`
 	TProxyPort         int          `yaml:"tproxy-port"`
 	MixedPort          int          `yaml:"mixed-port"`
+	MitmPort           int          `yaml:"mitm-port"`
 	Authentication     []string     `yaml:"authentication"`
 	AllowLan           bool         `yaml:"allow-lan"`
 	BindAddress        string       `yaml:"bind-address"`
@@ -174,12 +183,15 @@ type RawConfig struct {
 	Secret             string       `yaml:"secret"`
 	Interface          string       `yaml:"interface-name"`
 	RoutingMark        int          `yaml:"routing-mark"`
+	Sniffing           bool         `yaml:"sniffing"`
+	ForceCertVerify    bool         `yaml:"force-cert-verify"`
 
 	ProxyProvider map[string]map[string]any `yaml:"proxy-providers"`
 	Hosts         map[string]string         `yaml:"hosts"`
 	DNS           RawDNS                    `yaml:"dns"`
-	Tun           RawTun                    `yaml:"tun"`
+	Tun           Tun                       `yaml:"tun"`
 	IPTables      IPTables                  `yaml:"iptables"`
+	MITM          RawMitm                   `yaml:"mitm"`
 	Experimental  Experimental              `yaml:"experimental"`
 	Profile       Profile                   `yaml:"profile"`
 	Proxy         []map[string]any          `yaml:"proxies"`
@@ -200,21 +212,37 @@ func Parse(buf []byte) (*Config, error) {
 func UnmarshalRawConfig(buf []byte) (*RawConfig, error) {
 	// config with default value
 	rawCfg := &RawConfig{
-		AllowLan:       false,
-		BindAddress:    "*",
-		Mode:           T.Rule,
-		Authentication: []string{},
-		LogLevel:       log.INFO,
-		Hosts:          map[string]string{},
-		Rule:           []string{},
-		Proxy:          []map[string]any{},
-		ProxyGroup:     []map[string]any{},
-		Tun: RawTun{
-			Enable:    false,
-			Device:    "",
-			Stack:     C.TunGvisor,
-			DNSHijack: []string{"0.0.0.0:53"}, // default hijack all dns query
-			AutoRoute: true,
+		AllowLan:        false,
+		Sniffing:        false,
+		ForceCertVerify: false,
+		BindAddress:     "*",
+		Mode:            T.Rule,
+		Authentication:  []string{},
+		LogLevel:        log.INFO,
+		Hosts:           map[string]string{},
+		Rule:            []string{},
+		Proxy:           []map[string]any{},
+		ProxyGroup:      []map[string]any{},
+		Tun: Tun{
+			Enable: false,
+			Device: "",
+			Stack:  C.TunGvisor,
+			DNSHijack: []C.DNSUrl{ // default hijack all dns lookup
+				{
+					Network: "udp",
+					AddrPort: C.DNSAddrPort{
+						AddrPort: netip.MustParseAddrPort("0.0.0.0:53"),
+					},
+				},
+				{
+					Network: "tcp",
+					AddrPort: C.DNSAddrPort{
+						AddrPort: netip.MustParseAddrPort("0.0.0.0:53"),
+					},
+				},
+			},
+			AutoRoute:           false,
+			AutoDetectInterface: false,
 		},
 		IPTables: IPTables{
 			Enable:           false,
@@ -236,10 +264,14 @@ func UnmarshalRawConfig(buf []byte) (*RawConfig, error) {
 				"223.5.5.5",
 			},
 			NameServer: []string{ // default if user not set
-				"https://doh.pub/dns-query",
+				"https://120.53.53.53/dns-query",
 				"tls://223.5.5.5:853",
 			},
 		},
+		MITM: RawMitm{
+			Hosts: []string{},
+			Rules: []string{},
+		},
 		Profile: Profile{
 			StoreSelected: true,
 		},
@@ -265,14 +297,6 @@ func ParseRawConfig(rawCfg *RawConfig) (*Config, error) {
 	}
 	config.General = general
 
-	tunCfg, err := parseTun(rawCfg.Tun, config.General)
-	if err != nil {
-		return nil, err
-	}
-	config.Tun = tunCfg
-
-	dialer.DefaultInterface.Store(config.General.Interface)
-
 	proxies, providers, err := parseProxies(rawCfg)
 	if err != nil {
 		return nil, err
@@ -298,6 +322,12 @@ func ParseRawConfig(rawCfg *RawConfig) (*Config, error) {
 	}
 	config.DNS = dnsCfg
 
+	mitm, err := parseMitm(rawCfg.MITM)
+	if err != nil {
+		return nil, err
+	}
+	config.Mitm = mitm
+
 	config.Users = parseAuthentication(rawCfg.Authentication)
 
 	return config, nil
@@ -315,6 +345,19 @@ func parseGeneral(cfg *RawConfig) (*General, error) {
 		}
 	}
 
+	if cfg.Tun.Enable && cfg.Tun.AutoDetectInterface {
+		outboundInterface, err := commons.GetAutoDetectInterface()
+		if err != nil && cfg.Interface == "" {
+			return nil, fmt.Errorf("get auto detect interface fail: %w", err)
+		}
+
+		if outboundInterface != "" {
+			cfg.Interface = outboundInterface
+		}
+	}
+
+	dialer.DefaultInterface.Store(cfg.Interface)
+
 	return &General{
 		Inbound: Inbound{
 			Port:        cfg.Port,
@@ -322,6 +365,7 @@ func parseGeneral(cfg *RawConfig) (*General, error) {
 			RedirPort:   cfg.RedirPort,
 			TProxyPort:  cfg.TProxyPort,
 			MixedPort:   cfg.MixedPort,
+			MitmPort:    cfg.MitmPort,
 			AllowLan:    cfg.AllowLan,
 			BindAddress: cfg.BindAddress,
 		},
@@ -335,6 +379,8 @@ func parseGeneral(cfg *RawConfig) (*General, error) {
 		IPv6:        cfg.IPv6,
 		Interface:   cfg.Interface,
 		RoutingMark: cfg.RoutingMark,
+		Sniffing:    cfg.Sniffing,
+		Tun:         cfg.Tun,
 	}, nil
 }
 
@@ -344,6 +390,7 @@ func parseProxies(cfg *RawConfig) (proxies map[string]C.Proxy, providersMap map[
 	proxiesConfig := cfg.Proxy
 	groupsConfig := cfg.ProxyGroup
 	providersConfig := cfg.ProxyProvider
+	forceCertVerify := cfg.ForceCertVerify
 
 	var proxyList []string
 
@@ -353,7 +400,7 @@ func parseProxies(cfg *RawConfig) (proxies map[string]C.Proxy, providersMap map[
 
 	// parse proxy
 	for idx, mapping := range proxiesConfig {
-		proxy, err := adapter.ParseProxy(mapping)
+		proxy, err := adapter.ParseProxy(mapping, forceCertVerify)
 		if err != nil {
 			return nil, nil, fmt.Errorf("proxy %d: %w", idx, err)
 		}
@@ -385,7 +432,7 @@ func parseProxies(cfg *RawConfig) (proxies map[string]C.Proxy, providersMap map[
 			return nil, nil, fmt.Errorf("can not defined a provider called `%s`", provider.ReservedName)
 		}
 
-		pd, err := provider.ParseProxyProvider(name, mapping)
+		pd, err := provider.ParseProxyProvider(name, mapping, forceCertVerify)
 		if err != nil {
 			return nil, nil, fmt.Errorf("parse proxy provider %s error: %w", name, err)
 		}
@@ -501,24 +548,29 @@ func parseRules(cfg *RawConfig, proxies map[string]C.Proxy) ([]C.Rule, error) {
 	return rules, nil
 }
 
-func parseHosts(cfg *RawConfig) (*trie.DomainTrie, error) {
-	tree := trie.New()
+func parseHosts(cfg *RawConfig) (*trie.DomainTrie[netip.Addr], error) {
+	tree := trie.New[netip.Addr]()
 
 	// add default hosts
-	if err := tree.Insert("localhost", net.IP{127, 0, 0, 1}); err != nil {
+	if err := tree.Insert("localhost", netip.AddrFrom4([4]byte{127, 0, 0, 1})); err != nil {
 		log.Errorln("insert localhost to host error: %s", err.Error())
 	}
 
 	if len(cfg.Hosts) != 0 {
 		for domain, ipStr := range cfg.Hosts {
-			ip := net.ParseIP(ipStr)
-			if ip == nil {
+			ip, err := netip.ParseAddr(ipStr)
+			if err != nil {
 				return nil, fmt.Errorf("%s is not a valid IP", ipStr)
 			}
 			_ = tree.Insert(domain, ip)
 		}
 	}
 
+	// add mitm.clash hosts
+	if err := tree.Insert("mitm.clash", netip.AddrFrom4([4]byte{1, 2, 3, 4})); err != nil {
+		log.Errorln("insert mitm.clash to host error: %s", err.Error())
+	}
+
 	return tree, nil
 }
 
@@ -608,15 +660,15 @@ func parseNameServerPolicy(nsPolicy map[string]string) (map[string]dns.NameServe
 	return policy, nil
 }
 
-func parseFallbackIPCIDR(ips []string) ([]*net.IPNet, error) {
-	var ipNets []*net.IPNet
+func parseFallbackIPCIDR(ips []string) ([]*netip.Prefix, error) {
+	var ipNets []*netip.Prefix
 
 	for idx, ip := range ips {
-		_, ipnet, err := net.ParseCIDR(ip)
+		ipnet, err := netip.ParsePrefix(ip)
 		if err != nil {
 			return nil, fmt.Errorf("DNS FallbackIP[%d] format error: %s", idx, err.Error())
 		}
-		ipNets = append(ipNets, ipnet)
+		ipNets = append(ipNets, &ipnet)
 	}
 
 	return ipNets, nil
@@ -652,7 +704,7 @@ func parseFallbackGeoSite(countries []string, rules []C.Rule) ([]*router.DomainM
 	return sites, nil
 }
 
-func parseDNS(rawCfg *RawConfig, hosts *trie.DomainTrie, rules []C.Rule) (*DNS, error) {
+func parseDNS(rawCfg *RawConfig, hosts *trie.DomainTrie[netip.Addr], rules []C.Rule) (*DNS, error) {
 	cfg := rawCfg.DNS
 	if cfg.Enable && len(cfg.NameServer) == 0 {
 		return nil, fmt.Errorf("if DNS configuration is turned on, NameServer cannot be empty")
@@ -664,7 +716,7 @@ func parseDNS(rawCfg *RawConfig, hosts *trie.DomainTrie, rules []C.Rule) (*DNS,
 		IPv6:         cfg.IPv6,
 		EnhancedMode: cfg.EnhancedMode,
 		FallbackFilter: FallbackFilter{
-			IPCIDR:  []*net.IPNet{},
+			IPCIDR:  []*netip.Prefix{},
 			GeoSite: []*router.DomainMatcher{},
 		},
 	}
@@ -700,15 +752,15 @@ func parseDNS(rawCfg *RawConfig, hosts *trie.DomainTrie, rules []C.Rule) (*DNS,
 	}
 
 	if cfg.EnhancedMode == C.DNSFakeIP {
-		_, ipnet, err := net.ParseCIDR(cfg.FakeIPRange)
+		ipnet, err := netip.ParsePrefix(cfg.FakeIPRange)
 		if err != nil {
 			return nil, err
 		}
 
-		var host *trie.DomainTrie
+		var host *trie.DomainTrie[bool]
 		// fake ip skip host filter
 		if len(cfg.FakeIPFilter) != 0 {
-			host = trie.New()
+			host = trie.New[bool]()
 			for _, domain := range cfg.FakeIPFilter {
 				_ = host.Insert(domain, true)
 			}
@@ -716,7 +768,7 @@ func parseDNS(rawCfg *RawConfig, hosts *trie.DomainTrie, rules []C.Rule) (*DNS,
 
 		if len(dnsCfg.Fallback) != 0 {
 			if host == nil {
-				host = trie.New()
+				host = trie.New[bool]()
 			}
 			for _, fb := range dnsCfg.Fallback {
 				if net.ParseIP(fb.Addr) != nil {
@@ -727,7 +779,7 @@ func parseDNS(rawCfg *RawConfig, hosts *trie.DomainTrie, rules []C.Rule) (*DNS,
 		}
 
 		pool, err := fakeip.New(fakeip.Options{
-			IPNet:       ipnet,
+			IPNet:       &ipnet,
 			Size:        1000,
 			Host:        host,
 			Persistence: rawCfg.Profile.StoreFakeIP,
@@ -761,7 +813,7 @@ func parseDNS(rawCfg *RawConfig, hosts *trie.DomainTrie, rules []C.Rule) (*DNS,
 }
 
 func parseAuthentication(rawRecords []string) []auth.AuthUser {
-	users := []auth.AuthUser{}
+	var users []auth.AuthUser
 	for _, line := range rawRecords {
 		if user, pass, found := strings.Cut(line, ":"); found {
 			users = append(users, auth.AuthUser{User: user, Pass: pass})
@@ -770,36 +822,37 @@ func parseAuthentication(rawRecords []string) []auth.AuthUser {
 	return users
 }
 
-func parseTun(rawTun RawTun, general *General) (*Tun, error) {
-	if (rawTun.Enable || general.TProxyPort != 0) && general.Interface == "" {
-		autoDetectInterfaceName, err := commons.GetAutoDetectInterface()
-		if err != nil || autoDetectInterfaceName == "" {
-			return nil, fmt.Errorf("can not find auto detect interface: %w. you must be detect `interface-name` if tun set to enable or `tproxy-port` isn't zore", err)
-		}
+func parseMitm(rawMitm RawMitm) (*Mitm, error) {
+	var (
+		req []C.Rewrite
+		res []C.Rewrite
+	)
 
-		general.Interface = autoDetectInterfaceName
-	}
-
-	var dnsHijack []netip.AddrPort
-
-	for _, d := range rawTun.DNSHijack {
-		if _, after, ok := strings.Cut(d, "://"); ok {
-			d = after
-		}
-
-		addrPort, err := netip.ParseAddrPort(d)
+	for _, line := range rawMitm.Rules {
+		rule, err := rewrites.ParseRewrite(line)
 		if err != nil {
-			return nil, fmt.Errorf("parse dns-hijack url error: %w", err)
+			return nil, fmt.Errorf("parse rewrite rule failure: %w", err)
 		}
 
-		dnsHijack = append(dnsHijack, addrPort)
+		if rule.RuleType() == C.MitmResponseHeader || rule.RuleType() == C.MitmResponseBody {
+			res = append(res, rule)
+		} else {
+			req = append(req, rule)
+		}
 	}
 
-	return &Tun{
-		Enable:    rawTun.Enable,
-		Device:    rawTun.Device,
-		Stack:     rawTun.Stack,
-		DNSHijack: dnsHijack,
-		AutoRoute: rawTun.AutoRoute,
+	hosts := trie.New[bool]()
+
+	if len(rawMitm.Hosts) != 0 {
+		for _, domain := range rawMitm.Hosts {
+			_ = hosts.Insert(domain, true)
+		}
+	}
+
+	_ = hosts.Insert("mitm.clash", true)
+
+	return &Mitm{
+		Hosts: hosts,
+		Rules: rewrites.NewRewriteRules(req, res),
 	}, nil
 }

config/initial.go

@@ -12,7 +12,7 @@ import (
 )
 
 func downloadMMDB(path string) (err error) {
-	resp, err := http.Get("https://cdn.jsdelivr.net/gh/Loyalsoldier/geoip@release/Country.mmdb")
+	resp, err := http.Get("https://raw.githubusercontent.com/Loyalsoldier/geoip/release/Country.mmdb")
 	if err != nil {
 		return
 	}
@@ -32,43 +32,26 @@ func initMMDB() error {
 	if _, err := os.Stat(C.Path.MMDB()); os.IsNotExist(err) {
 		log.Infoln("Can't find MMDB, start download")
 		if err := downloadMMDB(C.Path.MMDB()); err != nil {
-			return fmt.Errorf("can't download MMDB: %s", err.Error())
+			return fmt.Errorf("can't download MMDB: %w", err)
 		}
 	}
 
 	if !mmdb.Verify() {
 		log.Warnln("MMDB invalid, remove and download")
 		if err := os.Remove(C.Path.MMDB()); err != nil {
-			return fmt.Errorf("can't remove invalid MMDB: %s", err.Error())
+			return fmt.Errorf("can't remove invalid MMDB: %w", err)
 		}
 
 		if err := downloadMMDB(C.Path.MMDB()); err != nil {
-			return fmt.Errorf("can't download MMDB: %s", err.Error())
+			return fmt.Errorf("can't download MMDB: %w", err)
 		}
 	}
 
 	return nil
 }
 
-//func downloadGeoIP(path string) (err error) {
-//	resp, err := http.Get("https://cdn.jsdelivr.net/gh/Loyalsoldier/v2ray-rules-dat@release/geoip.dat")
-//	if err != nil {
-//		return
-//	}
-//	defer resp.Body.Close()
-//
-//	f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0644)
-//	if err != nil {
-//		return err
-//	}
-//	defer f.Close()
-//	_, err = io.Copy(f, resp.Body)
-//
-//	return err
-//}
-
 func downloadGeoSite(path string) (err error) {
-	resp, err := http.Get("https://cdn.jsdelivr.net/gh/Loyalsoldier/v2ray-rules-dat@release/geosite.dat")
+	resp, err := http.Get("https://github.com/Loyalsoldier/v2ray-rules-dat/releases/latest/download/geosite.dat")
 	if err != nil {
 		return
 	}
@@ -84,24 +67,11 @@ func downloadGeoSite(path string) (err error) {
 	return err
 }
 
-//
-//func initGeoIP() error {
-//	if _, err := os.Stat(C.Path.GeoIP()); os.IsNotExist(err) {
-//		log.Infoln("Can't find GeoIP.dat, start download")
-//		if err := downloadGeoIP(C.Path.GeoIP()); err != nil {
-//			return fmt.Errorf("can't download GeoIP.dat: %s", err.Error())
-//		}
-//		log.Infoln("Download GeoIP.dat finish")
-//	}
-//
-//	return nil
-//}
-
 func initGeoSite() error {
 	if _, err := os.Stat(C.Path.GeoSite()); os.IsNotExist(err) {
 		log.Infoln("Can't find GeoSite.dat, start download")
 		if err := downloadGeoSite(C.Path.GeoSite()); err != nil {
-			return fmt.Errorf("can't download GeoSite.dat: %s", err.Error())
+			return fmt.Errorf("can't download GeoSite.dat: %w", err)
 		}
 		log.Infoln("Download GeoSite.dat finish")
 	}
@@ -114,7 +84,7 @@ func Init(dir string) error {
 	// initial homedir
 	if _, err := os.Stat(dir); os.IsNotExist(err) {
 		if err := os.MkdirAll(dir, 0o777); err != nil {
-			return fmt.Errorf("can't create config directory %s: %s", dir, err.Error())
+			return fmt.Errorf("can't create config directory %s: %w", dir, err)
 		}
 	}
 
@@ -123,17 +93,12 @@ func Init(dir string) error {
 		log.Infoln("Can't find config, create a initial config file")
 		f, err := os.OpenFile(C.Path.Config(), os.O_CREATE|os.O_WRONLY, 0o644)
 		if err != nil {
-			return fmt.Errorf("can't create file %s: %s", C.Path.Config(), err.Error())
+			return fmt.Errorf("can't create file %s: %w", C.Path.Config(), err)
 		}
-		f.Write([]byte(`mixed-port: 7890`))
-		f.Close()
+		_, _ = f.Write([]byte(`mixed-port: 7890`))
+		_ = f.Close()
 	}
 
-	//// initial GeoIP
-	//if err := initGeoIP(); err != nil {
-	//	return fmt.Errorf("can't initial GeoIP: %w", err)
-	//}
-
 	// initial mmdb
 	if err := initMMDB(); err != nil {
 		return fmt.Errorf("can't initial MMDB: %w", err)

config/updateGeo.go

@@ -0,0 +1,69 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"runtime"
+
+	"github.com/Dreamacro/clash/component/geodata"
+	_ "github.com/Dreamacro/clash/component/geodata/standard"
+	C "github.com/Dreamacro/clash/constant"
+
+	"github.com/oschwald/geoip2-golang"
+)
+
+func UpdateGeoDatabases() error {
+	var (
+		tmpMMDB    = C.Path.Resolve("temp_country.mmdb")
+		tmpGeoSite = C.Path.Resolve("temp_geosite.dat")
+	)
+
+	if err := downloadMMDB(tmpMMDB); err != nil {
+		return fmt.Errorf("can't download MMDB database file: %w", err)
+	}
+
+	if err := verifyMMDB(tmpMMDB); err != nil {
+		_ = os.Remove(tmpMMDB)
+		return fmt.Errorf("invalid MMDB database file, %w", err)
+	}
+
+	if err := os.Rename(tmpMMDB, C.Path.MMDB()); err != nil {
+		return fmt.Errorf("can't rename MMDB database file: %w", err)
+	}
+
+	if err := downloadGeoSite(tmpGeoSite); err != nil {
+		return fmt.Errorf("can't download GeoSite database file: %w", err)
+	}
+
+	if err := verifyGeoSite(tmpGeoSite); err != nil {
+		_ = os.Remove(tmpGeoSite)
+		return fmt.Errorf("invalid GeoSite database file, %w", err)
+	}
+
+	if err := os.Rename(tmpGeoSite, C.Path.GeoSite()); err != nil {
+		return fmt.Errorf("can't rename GeoSite database file: %w", err)
+	}
+
+	return nil
+}
+
+func verifyMMDB(path string) error {
+	instance, err := geoip2.Open(path)
+	if err == nil {
+		_ = instance.Close()
+	}
+	return err
+}
+
+func verifyGeoSite(path string) error {
+	geoLoader, err := geodata.GetGeoDataLoader("standard")
+	if err != nil {
+		return err
+	}
+
+	_, err = geoLoader.LoadSite(path, "cn")
+
+	runtime.GC()
+
+	return err
+}

constant/adapters.go

@@ -13,6 +13,7 @@ import (
 const (
 	Direct AdapterType = iota
 	Reject
+	Mitm
 
 	Shadowsocks
 	ShadowsocksR
@@ -92,9 +93,14 @@ type ProxyAdapter interface {
 	// a new session (if any)
 	StreamConn(c net.Conn, metadata *Metadata) (net.Conn, error)
 
+	// StreamPacketConn wraps a UDP protocol around net.Conn with Metadata.
+	StreamPacketConn(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, opts ...dialer.Option) (Conn, error)
+
+	// ListenPacketContext listen for a PacketConn
 	ListenPacketContext(ctx context.Context, metadata *Metadata, opts ...dialer.Option) (PacketConn, error)
 
 	// Unwrap extracts the proxy from a proxy-group. It returns nil when nothing to extract.
@@ -129,6 +135,8 @@ func (at AdapterType) String() string {
 		return "Direct"
 	case Reject:
 		return "Reject"
+	case Mitm:
+		return "Mitm"
 
 	case Shadowsocks:
 		return "Shadowsocks"

constant/metadata.go

@@ -3,6 +3,7 @@ package constant
 import (
 	"encoding/json"
 	"net"
+	"net/netip"
 	"strconv"
 )
 
@@ -23,6 +24,7 @@ const (
 	REDIR
 	TPROXY
 	TUN
+	MITM
 )
 
 type NetWork int
@@ -58,6 +60,8 @@ func (t Type) String() string {
 		return "TProxy"
 	case TUN:
 		return "Tun"
+	case MITM:
+		return "Mitm"
 	default:
 		return "Unknown"
 	}
@@ -69,25 +73,22 @@ func (t Type) MarshalJSON() ([]byte, error) {
 
 // Metadata is used to store connection address
 type Metadata struct {
-	NetWork     NetWork `json:"network"`
-	Type        Type    `json:"type"`
-	SrcIP       net.IP  `json:"sourceIP"`
-	DstIP       net.IP  `json:"destinationIP"`
-	SrcPort     string  `json:"sourcePort"`
-	DstPort     string  `json:"destinationPort"`
-	AddrType    int     `json:"-"`
-	Host        string  `json:"host"`
-	DNSMode     DNSMode `json:"dnsMode"`
-	Process     string  `json:"process"`
-	ProcessPath string  `json:"processPath"`
+	NetWork     NetWork    `json:"network"`
+	Type        Type       `json:"type"`
+	SrcIP       netip.Addr `json:"sourceIP"`
+	DstIP       netip.Addr `json:"destinationIP"`
+	SrcPort     string     `json:"sourcePort"`
+	DstPort     string     `json:"destinationPort"`
+	AddrType    int        `json:"-"`
+	Host        string     `json:"host"`
+	DNSMode     DNSMode    `json:"dnsMode"`
+	Process     string     `json:"process"`
+	ProcessPath string     `json:"processPath"`
+	UserAgent   string     `json:"userAgent"`
 }
 
 func (m *Metadata) RemoteAddress() string {
-	if m.DstIP != nil {
-		return net.JoinHostPort(m.DstIP.String(), m.DstPort)
-	} else {
-		return net.JoinHostPort(m.String(), m.DstPort)
-	}
+	return net.JoinHostPort(m.String(), m.DstPort)
 }
 
 func (m *Metadata) SourceAddress() string {
@@ -95,33 +96,33 @@ func (m *Metadata) SourceAddress() string {
 }
 
 func (m *Metadata) Resolved() bool {
-	return m.DstIP != nil
+	return m.DstIP.IsValid()
 }
 
 // Pure is used to solve unexpected behavior
 // when dialing proxy connection in DNSMapping mode.
-func (m *Metadata) Pure() *Metadata {
-	if m.DNSMode == DNSMapping && m.DstIP != nil {
-		copy := *m
-		copy.Host = ""
-		if copy.DstIP.To4() != nil {
-			copy.AddrType = AtypIPv4
+func (m *Metadata) Pure(isMitmOutbound bool) *Metadata {
+	if !isMitmOutbound && m.DNSMode == DNSMapping && m.DstIP.IsValid() {
+		copyM := *m
+		copyM.Host = ""
+		if copyM.DstIP.Is4() {
+			copyM.AddrType = AtypIPv4
 		} else {
-			copy.AddrType = AtypIPv6
+			copyM.AddrType = AtypIPv6
 		}
-		return &copy
+		return &copyM
 	}
 
 	return m
 }
 
 func (m *Metadata) UDPAddr() *net.UDPAddr {
-	if m.NetWork != UDP || m.DstIP == nil {
+	if m.NetWork != UDP || !m.DstIP.IsValid() {
 		return nil
 	}
 	port, _ := strconv.ParseUint(m.DstPort, 10, 16)
 	return &net.UDPAddr{
-		IP:   m.DstIP,
+		IP:   m.DstIP.AsSlice(),
 		Port: int(port),
 	}
 }
@@ -129,7 +130,7 @@ func (m *Metadata) UDPAddr() *net.UDPAddr {
 func (m *Metadata) String() string {
 	if m.Host != "" {
 		return m.Host
-	} else if m.DstIP != nil {
+	} else if m.DstIP.IsValid() {
 		return m.DstIP.String()
 	} else {
 		return "<nil>"
@@ -137,5 +138,5 @@ func (m *Metadata) String() string {
 }
 
 func (m *Metadata) Valid() bool {
-	return m.Host != "" || m.DstIP != nil
+	return m.Host != "" || m.DstIP.IsValid()
 }

constant/path.go

@@ -71,6 +71,10 @@ func (p *path) GeoSite() string {
 	return P.Join(p.homeDir, "geosite.dat")
 }
 
-func (p *path) GetAssetLocation(file string) string {
-	return P.Join(p.homeDir, file)
+func (p *path) RootCA() string {
+	return p.Resolve("mitm_ca.crt")
+}
+
+func (p *path) CAKey() string {
+	return p.Resolve("mitm_ca.key")
 }

constant/rewrite.go

@@ -0,0 +1,82 @@
+package constant
+
+import (
+	"regexp"
+)
+
+var RewriteTypeMapping = map[string]RewriteType{
+	MitmReject.String():         MitmReject,
+	MitmReject200.String():      MitmReject200,
+	MitmRejectImg.String():      MitmRejectImg,
+	MitmRejectDict.String():     MitmRejectDict,
+	MitmRejectArray.String():    MitmRejectArray,
+	Mitm302.String():            Mitm302,
+	Mitm307.String():            Mitm307,
+	MitmRequestHeader.String():  MitmRequestHeader,
+	MitmRequestBody.String():    MitmRequestBody,
+	MitmResponseHeader.String(): MitmResponseHeader,
+	MitmResponseBody.String():   MitmResponseBody,
+}
+
+const (
+	MitmReject RewriteType = iota
+	MitmReject200
+	MitmRejectImg
+	MitmRejectDict
+	MitmRejectArray
+
+	Mitm302
+	Mitm307
+
+	MitmRequestHeader
+	MitmRequestBody
+
+	MitmResponseHeader
+	MitmResponseBody
+)
+
+type RewriteType int
+
+func (rt RewriteType) String() string {
+	switch rt {
+	case MitmReject:
+		return "reject" // 404
+	case MitmReject200:
+		return "reject-200"
+	case MitmRejectImg:
+		return "reject-img"
+	case MitmRejectDict:
+		return "reject-dict"
+	case MitmRejectArray:
+		return "reject-array"
+	case Mitm302:
+		return "302"
+	case Mitm307:
+		return "307"
+	case MitmRequestHeader:
+		return "request-header"
+	case MitmRequestBody:
+		return "request-body"
+	case MitmResponseHeader:
+		return "response-header"
+	case MitmResponseBody:
+		return "response-body"
+	default:
+		return "Unknown"
+	}
+}
+
+type Rewrite interface {
+	ID() string
+	URLRegx() *regexp.Regexp
+	RuleType() RewriteType
+	RuleRegx() *regexp.Regexp
+	RulePayload() string
+	ReplaceURLPayload([]string) string
+	ReplaceSubPayload(string) string
+}
+
+type RewriteRule interface {
+	SearchInRequest(func(Rewrite) bool) bool
+	SearchInResponse(func(Rewrite) bool) bool
+}

constant/rule.go

@@ -13,6 +13,7 @@ const (
 	DstPort
 	Process
 	ProcessPath
+	UserAgent
 	MATCH
 )
 
@@ -42,6 +43,8 @@ func (rt RuleType) String() string {
 		return "Process"
 	case ProcessPath:
 		return "ProcessPath"
+	case UserAgent:
+		return "UserAgent"
 	case MATCH:
 		return "Match"
 	default:

constant/rule_extra.go

@@ -1,7 +1,7 @@
 package constant
 
 import (
-	"net"
+	"net/netip"
 	"strings"
 
 	"github.com/Dreamacro/clash/component/geodata/router"
@@ -9,7 +9,7 @@ import (
 
 type RuleExtra struct {
 	Network      NetWork
-	SourceIPs    []*net.IPNet
+	SourceIPs    []*netip.Prefix
 	ProcessNames []string
 }
 
@@ -17,7 +17,7 @@ func (re *RuleExtra) NotMatchNetwork(network NetWork) bool {
 	return re.Network != ALLNet && re.Network != network
 }
 
-func (re *RuleExtra) NotMatchSourceIP(srcIP net.IP) bool {
+func (re *RuleExtra) NotMatchSourceIP(srcIP netip.Addr) bool {
 	if re.SourceIPs == nil {
 		return false
 	}

constant/tun.go

@@ -3,7 +3,11 @@ package constant
 import (
 	"encoding/json"
 	"errors"
+	"net/netip"
+	"strconv"
 	"strings"
+
+	"golang.org/x/exp/slices"
 )
 
 var StackTypeMapping = map[string]TUNStack{
@@ -14,10 +18,21 @@ var StackTypeMapping = map[string]TUNStack{
 const (
 	TunGvisor TUNStack = iota
 	TunSystem
+
+	TunDisabled TUNState = iota
+	TunEnabled
+	TunPaused
 )
 
 type TUNStack int
 
+type TUNState int
+
+type TUNChangeCallback interface {
+	Pause()
+	Resume()
+}
+
 // UnmarshalYAML unserialize TUNStack with yaml
 func (e *TUNStack) UnmarshalYAML(unmarshal func(any) error) error {
 	var tp string
@@ -40,7 +55,7 @@ func (e TUNStack) MarshalYAML() (any, error) {
 // UnmarshalJSON unserialize TUNStack with json
 func (e *TUNStack) UnmarshalJSON(data []byte) error {
 	var tp string
-	json.Unmarshal(data, &tp)
+	_ = json.Unmarshal(data, &tp)
 	mode, exist := StackTypeMapping[strings.ToUpper(tp)]
 	if !exist {
 		return errors.New("invalid tun stack")
@@ -64,3 +79,113 @@ func (e TUNStack) String() string {
 		return "unknown"
 	}
 }
+
+type DNSAddrPort struct {
+	netip.AddrPort
+}
+
+func (p *DNSAddrPort) UnmarshalText(text []byte) error {
+	if len(text) == 0 {
+		*p = DNSAddrPort{}
+		return nil
+	}
+
+	addrPort := string(text)
+	if strings.HasPrefix(addrPort, "any") {
+		_, port, _ := strings.Cut(addrPort, "any")
+		addrPort = "0.0.0.0" + port
+	}
+
+	ap, err := netip.ParseAddrPort(addrPort)
+	*p = DNSAddrPort{AddrPort: ap}
+	return err
+}
+
+func (p DNSAddrPort) String() string {
+	addrPort := p.AddrPort.String()
+	if p.AddrPort.Addr().IsUnspecified() {
+		addrPort = "any:" + strconv.Itoa(int(p.AddrPort.Port()))
+	}
+	return addrPort
+}
+
+type DNSUrl struct {
+	Network  string
+	AddrPort DNSAddrPort
+}
+
+func (d *DNSUrl) UnmarshalYAML(unmarshal func(any) error) error {
+	var text string
+	if err := unmarshal(&text); err != nil {
+		return err
+	}
+
+	text = strings.ToLower(text)
+	network := "udp"
+	if before, after, found := strings.Cut(text, "://"); found {
+		network = before
+		text = after
+	}
+
+	if network != "udp" && network != "tcp" {
+		return errors.New("invalid dns url schema")
+	}
+
+	ap := &DNSAddrPort{}
+	if err := ap.UnmarshalText([]byte(text)); err != nil {
+		return err
+	}
+
+	*d = DNSUrl{Network: network, AddrPort: *ap}
+
+	return nil
+}
+
+func (d DNSUrl) MarshalYAML() (any, error) {
+	return d.String(), nil
+}
+
+func (d *DNSUrl) UnmarshalJSON(data []byte) error {
+	var text string
+	if err := json.Unmarshal(data, &text); err != nil {
+		return err
+	}
+
+	text = strings.ToLower(text)
+	network := "udp"
+	if before, after, found := strings.Cut(text, "://"); found {
+		network = before
+		text = after
+	}
+
+	if network != "udp" && network != "tcp" {
+		return errors.New("invalid dns url schema")
+	}
+
+	ap := &DNSAddrPort{}
+	if err := ap.UnmarshalText([]byte(text)); err != nil {
+		return err
+	}
+
+	*d = DNSUrl{Network: network, AddrPort: *ap}
+
+	return nil
+}
+
+func (d DNSUrl) MarshalJSON() ([]byte, error) {
+	return json.Marshal(d.String())
+}
+
+func (d DNSUrl) String() string {
+	return d.Network + "://" + d.AddrPort.String()
+}
+
+func RemoveDuplicateDNSUrl(slice []DNSUrl) []DNSUrl {
+	slices.SortFunc[DNSUrl](slice, func(a, b DNSUrl) bool {
+		return a.Network < b.Network || (a.Network == b.Network && a.AddrPort.Addr().Less(b.AddrPort.Addr()))
+	})
+
+	return slices.CompactFunc[[]DNSUrl, DNSUrl](slice, func(a, b DNSUrl) bool {
+		return a.Network == b.Network && a.AddrPort == b.AddrPort
+	})
+}

dns/client.go

@@ -5,6 +5,7 @@ import (
 	"crypto/tls"
 	"fmt"
 	"net"
+	"net/netip"
 	"strings"
 
 	"github.com/Dreamacro/clash/component/dialer"
@@ -28,10 +29,10 @@ func (c *client) Exchange(m *D.Msg) (*D.Msg, error) {
 
 func (c *client) ExchangeContext(ctx context.Context, m *D.Msg) (*D.Msg, error) {
 	var (
-		ip  net.IP
+		ip  netip.Addr
 		err error
 	)
-	if ip = net.ParseIP(c.host); ip == nil {
+	if ip, err = netip.ParseAddr(c.host); err != nil {
 		if c.r == nil {
 			return nil, fmt.Errorf("dns %s not a valid ip", c.host)
 		} else {
@@ -62,7 +63,9 @@ func (c *client) ExchangeContext(ctx context.Context, m *D.Msg) (*D.Msg, error)
 	if err != nil {
 		return nil, err
 	}
-	defer conn.Close()
+	defer func() {
+		_ = conn.Close()
+	}()
 
 	// miekg/dns ExchangeContext doesn't respond to context cancel.
 	// this is a workaround

dns/dhcp.go

@@ -1,9 +1,9 @@
 package dns
 
 import (
-	"bytes"
 	"context"
 	"net"
+	"net/netip"
 	"sync"
 	"time"
 
@@ -27,7 +27,7 @@ type dhcpClient struct {
 	ifaceInvalidate time.Time
 	dnsInvalidate   time.Time
 
-	ifaceAddr *net.IPNet
+	ifaceAddr *netip.Prefix
 	done      chan struct{}
 	resolver  *Resolver
 	err       error
@@ -127,12 +127,12 @@ func (d *dhcpClient) invalidate() (bool, error) {
 		return false, err
 	}
 
-	addr, err := ifaceObj.PickIPv4Addr(nil)
+	addr, err := ifaceObj.PickIPv4Addr(netip.Addr{})
 	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) {
+	if time.Now().Before(d.dnsInvalidate) && d.ifaceAddr == addr {
 		return false, nil
 	}
 

dns/enhancer.go

@@ -1,7 +1,7 @@
 package dns
 
 import (
-	"net"
+	"net/netip"
 
 	"github.com/Dreamacro/clash/common/cache"
 	"github.com/Dreamacro/clash/component/fakeip"
@@ -11,7 +11,7 @@ import (
 type ResolverEnhancer struct {
 	mode     C.DNSMode
 	fakePool *fakeip.Pool
-	mapping  *cache.LruCache
+	mapping  *cache.LruCache[netip.Addr, string]
 }
 
 func (h *ResolverEnhancer) FakeIPEnabled() bool {
@@ -22,7 +22,7 @@ func (h *ResolverEnhancer) MappingEnabled() bool {
 	return h.mode == C.DNSFakeIP || h.mode == C.DNSMapping
 }
 
-func (h *ResolverEnhancer) IsExistFakeIP(ip net.IP) bool {
+func (h *ResolverEnhancer) IsExistFakeIP(ip netip.Addr) bool {
 	if !h.FakeIPEnabled() {
 		return false
 	}
@@ -34,31 +34,31 @@ func (h *ResolverEnhancer) IsExistFakeIP(ip net.IP) bool {
 	return false
 }
 
-func (h *ResolverEnhancer) IsFakeIP(ip net.IP) bool {
+func (h *ResolverEnhancer) IsFakeIP(ip netip.Addr) bool {
 	if !h.FakeIPEnabled() {
 		return false
 	}
 
 	if pool := h.fakePool; pool != nil {
-		return pool.IPNet().Contains(ip) && !pool.Gateway().Equal(ip) && !pool.Broadcast().Equal(ip)
+		return pool.IPNet().Contains(ip) && ip != pool.Gateway() && ip != pool.Broadcast()
 	}
 
 	return false
 }
 
-func (h *ResolverEnhancer) IsFakeBroadcastIP(ip net.IP) bool {
+func (h *ResolverEnhancer) IsFakeBroadcastIP(ip netip.Addr) bool {
 	if !h.FakeIPEnabled() {
 		return false
 	}
 
 	if pool := h.fakePool; pool != nil {
-		return pool.Broadcast().Equal(ip)
+		return pool.Broadcast() == ip
 	}
 
 	return false
 }
 
-func (h *ResolverEnhancer) FindHostByIP(ip net.IP) (string, bool) {
+func (h *ResolverEnhancer) FindHostByIP(ip netip.Addr) (string, bool) {
 	if pool := h.fakePool; pool != nil {
 		if host, existed := pool.LookBack(ip); existed {
 			return host, true
@@ -66,20 +66,27 @@ func (h *ResolverEnhancer) FindHostByIP(ip net.IP) (string, bool) {
 	}
 
 	if mapping := h.mapping; mapping != nil {
-		if host, existed := h.mapping.Get(ip.String()); existed {
-			return host.(string), true
+		if host, existed := h.mapping.Get(ip); existed {
+			return host, true
 		}
 	}
 
 	return "", false
 }
 
-func (h *ResolverEnhancer) InsertHostByIP(ip net.IP, host string) {
+func (h *ResolverEnhancer) InsertHostByIP(ip netip.Addr, host string) {
 	if mapping := h.mapping; mapping != nil {
-		h.mapping.Set(ip.String(), host)
+		h.mapping.Set(ip, host)
 	}
 }
 
+func (h *ResolverEnhancer) FlushFakeIP() error {
+	if h.fakePool != nil {
+		return h.fakePool.FlushFakeIP()
+	}
+	return nil
+}
+
 func (h *ResolverEnhancer) PatchFrom(o *ResolverEnhancer) {
 	if h.mapping != nil && o.mapping != nil {
 		o.mapping.CloneTo(h.mapping)
@@ -90,20 +97,19 @@ func (h *ResolverEnhancer) PatchFrom(o *ResolverEnhancer) {
 	}
 }
 
-func (h *ResolverEnhancer) FlushFakeIP() error {
+func (h *ResolverEnhancer) StoreFakePoolState() {
 	if h.fakePool != nil {
-		return h.fakePool.FlushFakeIP()
+		h.fakePool.StoreState()
 	}
-	return nil
 }
 
 func NewEnhancer(cfg Config) *ResolverEnhancer {
 	var fakePool *fakeip.Pool
-	var mapping *cache.LruCache
+	var mapping *cache.LruCache[netip.Addr, string]
 
 	if cfg.EnhancedMode != C.DNSNormal {
 		fakePool = cfg.Pool
-		mapping = cache.NewLRUCache(cache.WithSize(4096), cache.WithStale(true))
+		mapping = cache.NewLRUCache[netip.Addr, string](cache.WithSize[netip.Addr, string](4096), cache.WithStale[netip.Addr, string](true))
 	}
 
 	return &ResolverEnhancer{

dns/filters.go

@@ -1,7 +1,7 @@
 package dns
 
 import (
-	"net"
+	"net/netip"
 	"strings"
 
 	"github.com/Dreamacro/clash/component/geodata/router"
@@ -10,23 +10,23 @@ import (
 )
 
 type fallbackIPFilter interface {
-	Match(net.IP) bool
+	Match(netip.Addr) bool
 }
 
 type geoipFilter struct {
 	code string
 }
 
-func (gf *geoipFilter) Match(ip net.IP) bool {
-	record, _ := mmdb.Instance().Country(ip)
+func (gf *geoipFilter) Match(ip netip.Addr) bool {
+	record, _ := mmdb.Instance().Country(ip.AsSlice())
 	return !strings.EqualFold(record.Country.IsoCode, gf.code) && !ip.IsPrivate()
 }
 
 type ipnetFilter struct {
-	ipnet *net.IPNet
+	ipnet *netip.Prefix
 }
 
-func (inf *ipnetFilter) Match(ip net.IP) bool {
+func (inf *ipnetFilter) Match(ip netip.Addr) bool {
 	return inf.ipnet.Contains(ip)
 }
 
@@ -35,13 +35,13 @@ type fallbackDomainFilter interface {
 }
 
 type domainFilter struct {
-	tree *trie.DomainTrie
+	tree *trie.DomainTrie[bool]
 }
 
 func NewDomainFilter(domains []string) *domainFilter {
-	df := domainFilter{tree: trie.New()}
+	df := domainFilter{tree: trie.New[bool]()}
 	for _, domain := range domains {
-		df.tree.Insert(domain, "")
+		_ = df.tree.Insert(domain, true)
 	}
 	return &df
 }