From 5991cfc0724d4afa2f6df0de04dcdd8a27681ac2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=96=E7=95=8C?= <i@sekai.icu>
Date: Fri, 15 Apr 2022 15:04:45 +0800
Subject: [PATCH] Fixes

---
 cli/ss-local/main.go      | 13 ----------
 common/cond.go            | 34 ++++++++++++++++++++++++-
 common/metadata/addr.go   | 11 +++++++++
 common/network/addr.go    | 33 +++++++++++++++++++++++++
 common/network/http.go    | 32 ++++++++++++++++++++++++
 common/network/pem.go     | 23 +++++++++++++++++
 common/os.go              | 32 ++++++++++++++++++++++++
 common/trieset/domain.go  |  4 +--
 common/uot/uot_test.go    |  4 +--
 go.mod                    |  6 ++---
 go.sum                    | 13 +++++-----
 protocol/wapd/listener.go | 52 ---------------------------------------
 protocol/wapd/protocol.go | 13 ----------
 13 files changed, 177 insertions(+), 93 deletions(-)
 create mode 100644 common/network/addr.go
 create mode 100644 common/network/http.go
 create mode 100644 common/network/pem.go
 create mode 100644 common/os.go
 delete mode 100644 protocol/wapd/listener.go
 delete mode 100644 protocol/wapd/protocol.go

diff --git a/cli/ss-local/main.go b/cli/ss-local/main.go
index 25b1680..abc664f 100644
--- a/cli/ss-local/main.go
+++ b/cli/ss-local/main.go
@@ -11,7 +11,6 @@ import (
 	"os"
 	"os/signal"
 	"runtime/debug"
-	"strconv"
 	"strings"
 	"syscall"
 	"time"
@@ -31,7 +30,6 @@ import (
 	"github.com/sagernet/sing/protocol/shadowsocks/shadowaead"
 	"github.com/sagernet/sing/protocol/shadowsocks/shadowaead_2022"
 	"github.com/sagernet/sing/protocol/socks"
-	"github.com/sagernet/sing/protocol/wapd"
 	"github.com/sagernet/sing/transport/mixed"
 	"github.com/sagernet/sing/transport/system"
 	"github.com/sirupsen/logrus"
@@ -54,7 +52,6 @@ type flags struct {
 	UseSystemRNG       bool   `json:"use_system_rng"`
 	ReducedSaltEntropy bool   `json:"reduced_salt_entropy"`
 	ConfigFile         string
-	WAPD               bool
 }
 
 func main() {
@@ -91,7 +88,6 @@ Only available with Linux kernel > 3.7.0.`)
 	command.Flags().BoolVarP(&f.Verbose, "verbose", "v", true, "Enable verbose mode.")
 	command.Flags().BoolVar(&f.UseSystemRNG, "use-system-rng", false, "Use system random number generator.")
 	command.Flags().BoolVar(&f.ReducedSaltEntropy, "reduced-salt-entropy", false, "Remapping salt to printable chars.")
-	command.Flags().BoolVar(&f.WAPD, "wapd", false, "Listen WADP server.")
 
 	err := command.Execute()
 	if err != nil {
@@ -106,7 +102,6 @@ type LocalClient struct {
 	method shadowsocks.Method
 	dialer net.Dialer
 	bypass string
-	wapd   *wapd.Listener
 }
 
 func NewLocalClient(f *flags) (*LocalClient, error) {
@@ -252,10 +247,6 @@ func NewLocalClient(f *flags) (*LocalClient, error) {
 
 	client.Listener = mixed.NewListener(netip.AddrPortFrom(bind, f.LocalPort), nil, transproxyMode, client)
 
-	if f.WAPD {
-		client.wapd = wapd.NewListener(netip.MustParseAddr("255.255.255.255"), "http://127.0.0.1:"+strconv.Itoa(int(f.LocalPort))+"/proxy.pac", client)
-	}
-
 	if f.Bypass != "" {
 		err := geoip.LoadMMDB("Country.mmdb")
 		if err != nil {
@@ -382,10 +373,6 @@ func Run(cmd *cobra.Command, flags *flags) {
 		logrus.Fatal(err)
 	}
 
-	if client.wapd != nil {
-		err = client.wapd.Start()
-	}
-
 	if err != nil {
 		logrus.Fatal(err)
 	}
diff --git a/common/cond.go b/common/cond.go
index 4df9bb1..f78afb6 100644
--- a/common/cond.go
+++ b/common/cond.go
@@ -43,6 +43,32 @@ func Filter[T any](arr []T, block func(it T) bool) []T {
 	return retArr
 }
 
+func Find[T any](arr []T, block func(it T) bool) T {
+	for _, it := range arr {
+		if block(it) {
+			return it
+		}
+	}
+	var defaultValue T
+	return defaultValue
+}
+
+func Uniq[T comparable](arr []T) []T {
+	result := make([]T, 0, len(arr))
+	seen := make(map[T]struct{}, len(arr))
+
+	for _, item := range arr {
+		if _, ok := seen[item]; ok {
+			continue
+		}
+
+		seen[item] = struct{}{}
+		result = append(result, item)
+	}
+
+	return result
+}
+
 func FilterIsInstance[T any, N any](arr []T, block func(it T) (N, bool)) []N {
 	var retArr []N
 	for _, it := range arr {
@@ -67,7 +93,7 @@ func IsEmpty[T any](array []T) bool {
 }
 
 func IsNotEmpty[T any](array []T) bool {
-	return len(array) >= 0
+	return len(array) > 0
 }
 
 func IsBlank(str string) bool {
@@ -96,6 +122,12 @@ func Must1(_ any, err error) {
 	}
 }
 
+func Must2(_ any, _ any, err error) {
+	if err != nil {
+		log.Fatalln(err)
+	}
+}
+
 func Close(closers ...any) error {
 	var retErr error
 	for _, closer := range closers {
diff --git a/common/metadata/addr.go b/common/metadata/addr.go
index 0e1dd4c..2ad2e3c 100644
--- a/common/metadata/addr.go
+++ b/common/metadata/addr.go
@@ -74,6 +74,17 @@ func ParseAddrPort(address string, port string) (*AddrPort, error) {
 	return AddrPortFrom(ParseAddr(address), uint16(portInt)), nil
 }
 
+func AddrFromNetAddr(netAddr net.Addr) Addr {
+	switch addr := netAddr.(type) {
+	case *net.IPAddr:
+		return AddrFromIP(addr.IP)
+	case *net.IPNet:
+		return AddrFromIP(addr.IP)
+	default:
+		return nil
+	}
+}
+
 func AddrPortFromNetAddr(netAddr net.Addr) *AddrPort {
 	var ip net.IP
 	var port uint16
diff --git a/common/network/addr.go b/common/network/addr.go
new file mode 100644
index 0000000..ac79c7c
--- /dev/null
+++ b/common/network/addr.go
@@ -0,0 +1,33 @@
+package network
+
+import (
+	"net"
+	"net/netip"
+
+	"github.com/sagernet/sing/common"
+	M "github.com/sagernet/sing/common/metadata"
+)
+
+func LocalAddrs() ([]netip.Addr, error) {
+	interfaceAddrs, err := net.InterfaceAddrs()
+	if err != nil {
+		return nil, err
+	}
+	return common.Map(common.Filter(common.Map(interfaceAddrs, func(addr net.Addr) M.Addr {
+		return M.AddrFromNetAddr(addr)
+	}), func(addr M.Addr) bool {
+		return addr != nil
+	}), func(it M.Addr) netip.Addr {
+		return it.Addr()
+	}), nil
+}
+
+func LocalPublicAddrs() ([]netip.Addr, error) {
+	publicAddrs, err := LocalAddrs()
+	if err != nil {
+		return nil, err
+	}
+	return common.Filter(publicAddrs, func(addr netip.Addr) bool {
+		return !(addr.IsPrivate() || addr.IsLoopback() || addr.IsMulticast() || addr.IsGlobalUnicast() || addr.IsLinkLocalUnicast() || addr.IsInterfaceLocalMulticast())
+	}), nil
+}
diff --git a/common/network/http.go b/common/network/http.go
new file mode 100644
index 0000000..83101d5
--- /dev/null
+++ b/common/network/http.go
@@ -0,0 +1,32 @@
+package network
+
+import (
+	"context"
+	"io/ioutil"
+	"net"
+	"net/http"
+)
+
+func HTTPClientWithNetwork(network string) *http.Client {
+	return &http.Client{
+		Transport: &http.Transport{
+			DialContext: func(ctx context.Context, _, addr string) (net.Conn, error) {
+				var dialer net.Dialer
+				return dialer.DialContext(ctx, network, addr)
+			},
+		},
+	}
+}
+
+func GetContext(ctx context.Context, client *http.Client, url string) ([]byte, error) {
+	request, err := http.NewRequestWithContext(ctx, "GET", url, nil)
+	if err != nil {
+		return nil, err
+	}
+	response, err := client.Do(request)
+	if err != nil {
+		return nil, err
+	}
+	defer response.Body.Close()
+	return ioutil.ReadAll(response.Body)
+}
diff --git a/common/network/pem.go b/common/network/pem.go
new file mode 100644
index 0000000..c8accd7
--- /dev/null
+++ b/common/network/pem.go
@@ -0,0 +1,23 @@
+package network
+
+import (
+	"crypto/ecdsa"
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/pem"
+)
+
+func PEMBlock(data interface{}) *pem.Block {
+	var pemBlock *pem.Block
+	switch key := data.(type) {
+	case *ecdsa.PrivateKey:
+		keyBytes, _ := x509.MarshalECPrivateKey(key)
+		pemBlock = &pem.Block{Type: "EC PRIVATE KEY", Bytes: keyBytes}
+	case *rsa.PrivateKey:
+		pemBlock = &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(key)}
+	case *x509.CertificateRequest:
+		pemBlock = &pem.Block{Type: "CERTIFICATE REQUEST", Bytes: key.Raw}
+	}
+
+	return pemBlock
+}
diff --git a/common/os.go b/common/os.go
new file mode 100644
index 0000000..f074bda
--- /dev/null
+++ b/common/os.go
@@ -0,0 +1,32 @@
+package common
+
+import (
+	"os"
+	"strings"
+
+	"github.com/v2fly/v2ray-core/v5/common"
+)
+
+func FileExists(path string) bool {
+	return common.Error2(os.Stat(path)) == nil
+}
+
+func WriteFile(path string, content []byte) error {
+	if strings.Contains(path, "/") {
+		parent := path[:strings.LastIndex(path, "/")]
+		if !FileExists(parent) {
+			err := os.MkdirAll(parent, 0o755)
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	file, err := os.Create(path)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+	_, err = file.Write(content)
+	return err
+}
diff --git a/common/trieset/domain.go b/common/trieset/domain.go
index 7a97113..ef01f0d 100644
--- a/common/trieset/domain.go
+++ b/common/trieset/domain.go
@@ -6,7 +6,7 @@ import (
 	"sort"
 	"strings"
 
-	"github.com/samber/lo"
+	"github.com/sagernet/sing/common"
 )
 
 // ErrInvalidDomain means insert domain is invalid
@@ -89,7 +89,7 @@ func New(domains []string) (*DomainSet, error) {
 	}
 
 	sort.Strings(list)
-	list = lo.Uniq(list)
+	list = common.Uniq(list)
 
 	return &DomainSet{NewSet(list)}, nil
 }
diff --git a/common/uot/uot_test.go b/common/uot/uot_test.go
index 753bfaa..f5c0f89 100644
--- a/common/uot/uot_test.go
+++ b/common/uot/uot_test.go
@@ -4,8 +4,8 @@ import (
 	"net"
 	"testing"
 
-	"github.com/sagernet/uot/common"
-	"github.com/sagernet/uot/common/buf"
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/buf"
 	"golang.org/x/net/dns/dnsmessage"
 )
 
diff --git a/go.mod b/go.mod
index e1abdbd..64c99d7 100644
--- a/go.mod
+++ b/go.mod
@@ -7,8 +7,6 @@ require (
 	github.com/klauspost/compress v1.15.1
 	github.com/openacid/low v0.1.21
 	github.com/oschwald/geoip2-golang v1.7.0
-	github.com/sagernet/uot v0.0.0-20220403125237-bf82029ad617
-	github.com/samber/lo v1.11.0
 	github.com/seiflotfy/cuckoofilter v0.0.0-20201222105146-bc6005554a0c
 	github.com/sirupsen/logrus v1.8.1
 	github.com/spf13/cobra v1.4.0
@@ -30,11 +28,13 @@ require (
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
 	github.com/klauspost/cpuid/v2 v2.0.9 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
 	github.com/oschwald/maxminddb-golang v1.9.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/u-root/uio v0.0.0-20210528114334-82958018845c // indirect
-	golang.org/x/exp v0.0.0-20220303212507-bbda1eaf7a17 // indirect
+	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 )
diff --git a/go.sum b/go.sum
index 7a3e475..656177f 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,6 @@
 github.com/blang/semver v3.5.1+incompatible/go.mod h1:kRBLl5iJ+tD4TcOOxsy/0fnwebNt5EWlYSAyrTnjyyk=
 github.com/cpuguy83/go-md2man/v2 v2.0.1/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -32,7 +33,10 @@ github.com/klauspost/compress v1.15.1 h1:y9FcTHGyrebwfP0ZZqFiaxTaiDnUrGkJkI+f583
 github.com/klauspost/compress v1.15.1/go.mod h1:/3/Vjq9QcHkK5uEr5lBEmyoZ1iFhe47etQ6QUkpK6sk=
 github.com/klauspost/cpuid/v2 v2.0.9 h1:lgaqFMSdTdQYdZ04uHyN2d/eKdOMyi2YLSvlQIBFYa4=
 github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/mdlayher/ethernet v0.0.0-20190606142754-0394541c37b7/go.mod h1:U6ZQobyTjI/tJyq2HG+i/dfSoFUt8/aZCM+GKtmFk/Y=
 github.com/mdlayher/netlink v0.0.0-20190409211403-11939a169225/go.mod h1:eQB3mZE4aiYnlUsyGGCOpPETfdQq4Jhsgf1fk3cwQaA=
 github.com/mdlayher/netlink v1.0.0/go.mod h1:KxeJAFOFLG6AjpyDkQ/iIhxygIUKD+vcwqcnu43w/+M=
@@ -41,6 +45,7 @@ github.com/mdlayher/netlink v1.1.1/go.mod h1:WTYpFb/WTvlRJAyKhZL5/uy69TDDpHHu2VZ
 github.com/mdlayher/raw v0.0.0-20190606142536-fef19f00fc18/go.mod h1:7EpbotpCmVZcu+KCX4g9WaRNuu11uyhiW7+Le1dKawg=
 github.com/mdlayher/raw v0.0.0-20191009151244-50f2db8cc065/go.mod h1:7EpbotpCmVZcu+KCX4g9WaRNuu11uyhiW7+Le1dKawg=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e h1:fD57ERR4JtEqsWbfPhv4DMiApHyliiK5xCTNVSPiaAs=
+github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
 github.com/openacid/errors v0.8.1/go.mod h1:GUQEJJOJE3W9skHm8E8Y4phdl2LLEN8iD7c5gcGgdx0=
 github.com/openacid/low v0.1.21 h1:Tr2GNu4N/+rGRYdOsEHOE89cxUIaDViZbVmKz29uKGo=
 github.com/openacid/low v0.1.21/go.mod h1:q+MsKI6Pz2xsCkzV4BLj7NR5M4EX0sGz5AqotpZDVh0=
@@ -56,10 +61,6 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3 h1:f/FNXud6gA3MNr8meMVVGxhp+QBTqY91tM8HjEuMjGg=
 github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3/go.mod h1:HgjTstvQsPGkxUsCd2KWxErBblirPizecHcpD3ffK+s=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
-github.com/sagernet/uot v0.0.0-20220403125237-bf82029ad617 h1:h46Ocvf7zWpatqOHcR4kw+k2GbGcMM7EzGjYG7wiGfM=
-github.com/sagernet/uot v0.0.0-20220403125237-bf82029ad617/go.mod h1:T2LhXiIIvaoeKii21x1GONCee9u7N9Nnrqz5bY3SWsM=
-github.com/samber/lo v1.11.0 h1:JfeYozXL1xfkhRUFOfH13ociyeiLSC/GRJjGKI668xM=
-github.com/samber/lo v1.11.0/go.mod h1:2I7tgIv8Q1SG2xEIkRq0F2i2zgxVpnyPOP0d3Gj2r+A=
 github.com/seiflotfy/cuckoofilter v0.0.0-20201222105146-bc6005554a0c h1:pqy40B3MQWYrza7YZXOXgl0Nf0QGFqrOC0BKae1UNAA=
 github.com/seiflotfy/cuckoofilter v0.0.0-20201222105146-bc6005554a0c/go.mod h1:bR6DqgcAl1zTcOX8/pE2Qkj9XO00eCNqmKb7lXP8EAg=
 github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
@@ -78,7 +79,6 @@ github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.1 h1:5TQK59W5E3v0r2duFAb7P95B6hEeOyEnHRa8MjYSMTY=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/thoas/go-funk v0.9.1 h1:O549iLZqPpTUQ10ykd26sZhzD+rmR5pWhuElrhbC20M=
 github.com/u-root/uio v0.0.0-20210528114334-82958018845c h1:BFvcl34IGnw8yvJi8hlqLFo9EshRInwWBs2M5fGWzQA=
 github.com/u-root/uio v0.0.0-20210528114334-82958018845c/go.mod h1:LpEX5FO/cB+WF4TYGY1V5qktpaZLkKkSegbr0V4eYXA=
 github.com/ulikunitz/xz v0.5.10 h1:t92gobL9l3HE202wg3rlk19F6X+JOxl9BBrCCMYEYd8=
@@ -91,8 +91,6 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20220408190544-5352b0902921 h1:iU7T1X1J6yxDr0rda54sWGkHgOp5XJrqm79gcNlC2VM=
 golang.org/x/crypto v0.0.0-20220408190544-5352b0902921/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
-golang.org/x/exp v0.0.0-20220303212507-bbda1eaf7a17 h1:3MTrJm4PyNL9NBqvYDSj3DHl46qQakyfqfWo4jgfaEM=
-golang.org/x/exp v0.0.0-20220303212507-bbda1eaf7a17/go.mod h1:lgLbSvA5ygNOMpwM/9anMpWVlVJ7Z+cHWq/eFuinpGE=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190419010253-1f3472d942ba/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
@@ -134,6 +132,7 @@ google.golang.org/protobuf v1.28.0 h1:w43yiav+6bVFTBQFZX0r7ipe9JQ1QsbMgHwbBziscL
 google.golang.org/protobuf v1.28.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
+gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/protocol/wapd/listener.go b/protocol/wapd/listener.go
deleted file mode 100644
index 2a0a83e..0000000
--- a/protocol/wapd/listener.go
+++ /dev/null
@@ -1,52 +0,0 @@
-package wapd
-
-import (
-	"fmt"
-	"net/netip"
-
-	"github.com/insomniacslk/dhcp/dhcpv4"
-	_ "github.com/insomniacslk/dhcp/dhcpv6"
-	"github.com/sagernet/sing/common/buf"
-	E "github.com/sagernet/sing/common/exceptions"
-	M "github.com/sagernet/sing/common/metadata"
-	"github.com/sagernet/sing/transport/udp"
-	"github.com/sirupsen/logrus"
-)
-
-type Listener struct {
-	*udp.Listener
-	E.Handler
-	option dhcpv4.Option
-}
-
-func NewListener(bind netip.Addr, proxyURL string, errorHandler E.Handler) *Listener {
-	l := &Listener{
-		Handler: errorHandler,
-		option: dhcpv4.Option{
-			Code:  OptionCode,
-			Value: dhcpv4.String(fmt.Sprint(proxyURL)),
-		},
-	}
-	l.Listener = udp.NewUDPListener(netip.AddrPortFrom(bind, dhcpv4.ServerPort), l)
-	return l
-}
-
-func (l *Listener) NewPacket(packet *buf.Buffer, metadata M.Metadata) error {
-	request, err := dhcpv4.FromBytes(packet.Bytes())
-	if err != nil {
-		return E.Cause(err, "bad dhcpv4 packet")
-	}
-	logrus.Trace("DHCPv4 request ", request)
-	if !request.IsOptionRequested(OptionCode) {
-		return nil
-	}
-	reply, err := dhcpv4.NewReplyFromRequest(request, dhcpv4.WithOption(l.option))
-	if err != nil {
-		return E.Cause(err, "create response")
-	}
-	_, err = l.WriteTo(reply.ToBytes(), metadata.Source.UDPAddr())
-	if err != nil {
-		return E.Cause(err, "write response")
-	}
-	return nil
-}
diff --git a/protocol/wapd/protocol.go b/protocol/wapd/protocol.go
deleted file mode 100644
index 2d273ac..0000000
--- a/protocol/wapd/protocol.go
+++ /dev/null
@@ -1,13 +0,0 @@
-package wapd
-
-var OptionCode = optionCode{}
-
-type optionCode struct{}
-
-func (C optionCode) Code() uint8 {
-	return 252
-}
-
-func (C optionCode) String() string {
-	return "Web Proxy Auto-Discovery Protocol"
-}