feat : upgrade wireguard go sdk (#2716)

Co-authored-by: kunson <kunson@kunsondeMacBook-Pro-3.local>
Co-authored-by: 世界 <i@sekai.icu>

go.mod

@@ -14,19 +14,19 @@ require (
 	github.com/refraction-networking/utls v1.5.4
 	github.com/sagernet/sing v0.2.17
 	github.com/sagernet/sing-shadowsocks v0.2.5
-	github.com/sagernet/wireguard-go v0.0.0-20221116151939-c99467f53f2c
 	github.com/seiflotfy/cuckoofilter v0.0.0-20220411075957-e3b120b3f5fb
 	github.com/stretchr/testify v1.8.4
 	github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e
+	github.com/vishvananda/netlink v1.2.1-beta.2.0.20230316163032-ced5aaba43e3
 	github.com/xtls/reality v0.0.0-20230828171259-e426190d57f6
 	go4.org/netipx v0.0.0-20230824141953-6213f710f925
 	golang.org/x/crypto v0.15.0
 	golang.org/x/net v0.18.0
 	golang.org/x/sync v0.5.0
 	golang.org/x/sys v0.14.0
+	golang.zx2c4.com/wireguard v0.0.0-20231022001213-2e0774f246fb
 	google.golang.org/grpc v1.59.0
 	google.golang.org/protobuf v1.31.0
-	gvisor.dev/gvisor v0.0.0-20230822212503-5bf4e5f98744
 	h12.io/socks v1.0.3
 	lukechampine.com/blake3 v1.2.1
 )
@@ -48,14 +48,16 @@ require (
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/quic-go/qtls-go1-20 v0.4.1 // indirect
 	github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3 // indirect
-	go.uber.org/atomic v1.11.0 // indirect
+	github.com/vishvananda/netns v0.0.0-20211101163701-50045581ed74 // indirect
 	go.uber.org/mock v0.3.0 // indirect
 	golang.org/x/exp v0.0.0-20230905200255-921286631fa9 // indirect
 	golang.org/x/mod v0.12.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
 	golang.org/x/time v0.3.0 // indirect
 	golang.org/x/tools v0.13.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20230920204549-e6e6cdab5c13 // indirect
+	golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230822172742-b8732ec3820d // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
+	gvisor.dev/gvisor v0.0.0-20230927004350-cbd86285d259 // indirect
 )

go.sum

@@ -129,8 +129,6 @@ github.com/sagernet/sing v0.2.17 h1:vMPKb3MV0Aa5ws4dCJkRI8XEjrsUcDn810czd0FwmzI=
 github.com/sagernet/sing v0.2.17/go.mod h1:OL6k2F0vHmEzXz2KW19qQzu172FDgSbUSODylighuVo=
 github.com/sagernet/sing-shadowsocks v0.2.5 h1:qxIttos4xu6ii7MTVJYA8EFQR7Q3KG6xMqmLJIFtBaY=
 github.com/sagernet/sing-shadowsocks v0.2.5/go.mod h1:MGWGkcU2xW2G2mfArT9/QqpVLOGU+dBaahZCtPHdt7A=
-github.com/sagernet/wireguard-go v0.0.0-20221116151939-c99467f53f2c h1:vK2wyt9aWYHHvNLWniwijBu/n4pySypiKRhN32u/JGo=
-github.com/sagernet/wireguard-go v0.0.0-20221116151939-c99467f53f2c/go.mod h1:euOmN6O5kk9dQmgSS8Df4psAl3TCjxOz0NW60EWkSaI=
 github.com/seiflotfy/cuckoofilter v0.0.0-20220411075957-e3b120b3f5fb h1:XfLJSPIOUX+osiMraVgIrMR27uMXnRJWGm1+GL8/63U=
 github.com/seiflotfy/cuckoofilter v0.0.0-20220411075957-e3b120b3f5fb/go.mod h1:bR6DqgcAl1zTcOX8/pE2Qkj9XO00eCNqmKb7lXP8EAg=
 github.com/sergi/go-diff v1.0.0/go.mod h1:0CfEIISq7TuYL3j771MWULgwwjU+GofnZX9QAmXWZgo=
@@ -168,12 +166,15 @@ github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e h1:5QefA066A1tF
 github.com/v2fly/ss-bloomring v0.0.0-20210312155135-28617310f63e/go.mod h1:5t19P9LBIrNamL6AcMQOncg/r10y3Pc01AbHeMhwlpU=
 github.com/viant/assertly v0.4.8/go.mod h1:aGifi++jvCrUaklKEKT0BU95igDNaqkvz+49uaYMPRU=
 github.com/viant/toolbox v0.24.0/go.mod h1:OxMCG57V0PXuIP2HNQrtJf2CjqdmbrOx5EkMILuUhzM=
+github.com/vishvananda/netlink v1.2.1-beta.2.0.20230316163032-ced5aaba43e3 h1:tkMT5pTye+1NlKIXETU78NXw0fyjnaNHmJyyLyzw8+U=
+github.com/vishvananda/netlink v1.2.1-beta.2.0.20230316163032-ced5aaba43e3/go.mod h1:cAAsePK2e15YDAMJNyOpGYEWNe4sIghTY7gpz4cX/Ik=
+github.com/vishvananda/netns v0.0.0-20200728191858-db3c7e526aae/go.mod h1:DD4vA1DwXk04H54A1oHXtwZmA0grkVMdPxx/VGLCah0=
+github.com/vishvananda/netns v0.0.0-20211101163701-50045581ed74 h1:gga7acRE695APm9hlsSMoOoE65U4/TcqNj90mc69Rlg=
+github.com/vishvananda/netns v0.0.0-20211101163701-50045581ed74/go.mod h1:DD4vA1DwXk04H54A1oHXtwZmA0grkVMdPxx/VGLCah0=
 github.com/xtls/reality v0.0.0-20230828171259-e426190d57f6 h1:T+YCYGfFdzyaKTDCdZn/hEiKvsw6yUfd+e4hze0rCUw=
 github.com/xtls/reality v0.0.0-20230828171259-e426190d57f6/go.mod h1:rkuAY1S9F8eI8gDiPDYvACE8e2uwkyg8qoOTuwWov7Y=
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 go.opencensus.io v0.18.0/go.mod h1:vKdFvxhtzZ9onBp9VKHK8z/sRpBMnKAsufL7wlDrCOA=
-go.uber.org/atomic v1.11.0 h1:ZvwS0R+56ePWxUNi+Atn9dWONBPp/AUETXlHW0DxSjE=
-go.uber.org/atomic v1.11.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0=
 go.uber.org/mock v0.3.0 h1:3mUxI1No2/60yUYax92Pt8eNOEecx2D3lcXZh2NEZJo=
 go.uber.org/mock v0.3.0/go.mod h1:a6FSlNadKUHUa9IP5Vyt1zh4fC7uAwxMutEAscFbkZc=
 go4.org v0.0.0-20180809161055-417644f6feb5/go.mod h1:MkTOUMDaeVYJUOUsaDXIhWPZYa1yOyC1qaOBpL57BhE=
@@ -227,9 +228,11 @@ golang.org/x/sys v0.0.0-20181029174526-d69651ed3497/go.mod h1:STP8DvDyc/dI5b8T5h
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190316082340-a2f829d7f35f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200217220822-9197077df867/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220804214406-8e32c043e418/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.14.0 h1:Vz7Qs629MkJkGyHxUlRHizWJRG2j8fbQKjELVSNhy7Q=
 golang.org/x/sys v0.14.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
@@ -256,6 +259,10 @@ golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8T
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 h1:B82qJJgjvYKsXS9jeunTOisW56dUokqW/FOteYJJ/yg=
+golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2/go.mod h1:deeaetjYA+DHMHg+sMSMI58GrEteJUUzzw7en6TJQcI=
+golang.zx2c4.com/wireguard v0.0.0-20231022001213-2e0774f246fb h1:c5tyN8sSp8jSDxdCCDXVOpJwYXXhmTkNMt+g0zTSOic=
+golang.zx2c4.com/wireguard v0.0.0-20231022001213-2e0774f246fb/go.mod h1:tkCQ4FQXmpAgYVh++1cq16/dH4QJtmvpRv19DWGAHSA=
 google.golang.org/api v0.0.0-20180910000450-7ca32eb868bf/go.mod h1:4mhQ8q/RsB7i+udVvVy5NUi08OU8ZlA0gRVgrF7VFY0=
 google.golang.org/api v0.0.0-20181030000543-1d582fd0359e/go.mod h1:4mhQ8q/RsB7i+udVvVy5NUi08OU8ZlA0gRVgrF7VFY0=
 google.golang.org/api v0.1.0/go.mod h1:UGEZY7KEX120AnNLIHFMKIo4obdJhkp2tPbaPlQx13Y=
@@ -268,8 +275,8 @@ google.golang.org/genproto v0.0.0-20180831171423-11092d34479b/go.mod h1:JiN7NxoA
 google.golang.org/genproto v0.0.0-20181029155118-b69ba1387ce2/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20181202183823-bd91e49a0898/go.mod h1:7Ep/1NZk928CDR8SjdVbjWNpdIf6nzjE3BTgJDr2Atg=
 google.golang.org/genproto v0.0.0-20190306203927-b5d61aea6440/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20230920204549-e6e6cdab5c13 h1:N3bU/SQDCDyD6R528GJ/PwW9KjYcJA3dgyH+MovAkIM=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20230822172742-b8732ec3820d h1:uvYuEyMHKNt+lT4K3bN6fGswmK8qSvcreM3BwjDh+y4=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20230920204549-e6e6cdab5c13/go.mod h1:KSqppvjFjtoCI+KGd4PELB0qLNxdJHRGqRI09mB6pQA=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20230822172742-b8732ec3820d/go.mod h1:+Bk1OCOj40wS2hwAMA+aCW9ypzm63QTBBHp6lQ3p+9M=
 google.golang.org/grpc v1.14.0/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.16.0/go.mod h1:0JHn/cJsOMiMfNA9+DeHDlAU7KAAB5GDlYFpa9MZMio=
 google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
@@ -293,8 +300,8 @@ gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c/go.mod h1:K4uyk7z7BCEPqu6E+C
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 grpc.go4.org v0.0.0-20170609214715-11d0a25b4919/go.mod h1:77eQGdRu53HpSqPFJFmuJdjuHRquDANNeA4x7B8WQ9o=
-gvisor.dev/gvisor v0.0.0-20230822212503-5bf4e5f98744 h1:tE44CyJgxEGzoPtHs9GI7ddKdgEGCREQBP54AmaVM+I=
+gvisor.dev/gvisor v0.0.0-20230927004350-cbd86285d259 h1:TbRPT0HtzFP3Cno1zZo7yPzEEnfu8EjLfl6IU9VfqkQ=
-gvisor.dev/gvisor v0.0.0-20230822212503-5bf4e5f98744/go.mod h1:lYEMhXbxgudVhALYsMQrBaUAjM3NMinh8mKL1CJv7rc=
+gvisor.dev/gvisor v0.0.0-20230927004350-cbd86285d259/go.mod h1:AVgIgHMwK63XvmAzWG9vLQ41YnVHN0du0tEC46fI7yY=
 h12.io/socks v1.0.3 h1:Ka3qaQewws4j4/eDQnOdpr4wXsC//dXtWvftlIcCQUo=
 h12.io/socks v1.0.3/go.mod h1:AIhxy1jOId/XCz9BO+EIgNL2rQiPTBNnOfnVnQ+3Eck=
 honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

proxy/wireguard/bind.go

@@ -9,7 +9,8 @@ import (
 	"strconv"
 	"sync"
 
-	"github.com/sagernet/wireguard-go/conn"
+	"golang.zx2c4.com/wireguard/conn"
+
 	xnet "github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/transport/internet"
@@ -36,7 +37,7 @@ type netBindClient struct {
 	readQueue chan *netReadInfo
 }
 
-func (n *netBindClient) ParseEndpoint(s string) (conn.Endpoint, error) {
+func (bind *netBindClient) ParseEndpoint(s string) (conn.Endpoint, error) {
 	ipStr, port, _, err := splitAddrPort(s)
 	if err != nil {
 		return nil, err
@@ -44,7 +45,7 @@ func (n *netBindClient) ParseEndpoint(s string) (conn.Endpoint, error) {
 
 	var addr net.IP
 	if IsDomainName(ipStr) {
-		ips, err := n.dns.LookupIP(ipStr, n.dnsOption)
+		ips, err := bind.dns.LookupIP(ipStr, bind.dnsOption)
 		if err != nil {
 			return nil, err
 		} else if len(ips) == 0 {
@@ -79,22 +80,22 @@ func (n *netBindClient) ParseEndpoint(s string) (conn.Endpoint, error) {
 func (bind *netBindClient) Open(uport uint16) ([]conn.ReceiveFunc, uint16, error) {
 	bind.readQueue = make(chan *netReadInfo)
 
-	fun := func(buff []byte) (cap int, ep conn.Endpoint, err error) {
+	fun := func(bufs [][]byte, sizes []int, eps []conn.Endpoint) (n int, err error) {
 		defer func() {
 			if r := recover(); r != nil {
-				cap = 0
+				n = 0
-				ep = nil
 				err = errors.New("channel closed")
 			}
 		}()
 
 		r := &netReadInfo{
-			buff: buff,
+			buff: bufs[0],
 		}
 		r.waiter.Add(1)
 		bind.readQueue <- r
 		r.waiter.Wait() // wait read goroutine done, or we will miss the result
-		return r.bytes, r.endpoint, r.err
+		sizes[0], eps[0] = r.bytes, r.endpoint
+		return 1, r.err
 	}
 	workers := bind.workers
 	if workers <= 0 {
@@ -150,7 +151,7 @@ func (bind *netBindClient) connectTo(endpoint *netEndpoint) error {
 	return nil
 }
 
-func (bind *netBindClient) Send(buff []byte, endpoint conn.Endpoint) error {
+func (bind *netBindClient) Send(buff [][]byte, endpoint conn.Endpoint) error {
 	var err error
 
 	nend, ok := endpoint.(*netEndpoint)
@@ -165,19 +166,25 @@ func (bind *netBindClient) Send(buff []byte, endpoint conn.Endpoint) error {
 		}
 	}
 
+	for _, buff := range buff {
 		if len(buff) > 3 && len(bind.reserved) == 3 {
 			copy(buff[1:], bind.reserved)
 		}
-
+		if _, err = nend.conn.Write(buff); err != nil {
-	_, err = nend.conn.Write(buff)
-
 			return err
+		}
+	}
+	return nil
 }
 
 func (bind *netBindClient) SetMark(mark uint32) error {
 	return nil
 }
 
+func (bind *netBindClient) BatchSize() int {
+	return 1
+}
+
 type netEndpoint struct {
 	dst  xnet.Destination
 	conn net.Conn
@@ -264,3 +271,44 @@ func splitAddrPort(s string) (ip string, port uint16, v6 bool, err error) {
 
 	return ip, port, v6, nil
 }
+
+func IsDomainName(s string) bool {
+	l := len(s)
+	if l == 0 || l > 254 || l == 254 && s[l-1] != '.' {
+		return false
+	}
+	last := byte('.')
+	nonNumeric := false
+	partlen := 0
+	for i := 0; i < len(s); i++ {
+		c := s[i]
+		switch {
+		default:
+			return false
+		case 'a' <= c && c <= 'z' || 'A' <= c && c <= 'Z' || c == '_':
+			nonNumeric = true
+			partlen++
+		case '0' <= c && c <= '9':
+			partlen++
+		case c == '-':
+			if last == '.' {
+				return false
+			}
+			partlen++
+			nonNumeric = true
+		case c == '.':
+			if last == '.' || last == '-' {
+				return false
+			}
+			if partlen > 63 || partlen == 0 {
+				return false
+			}
+			partlen = 0
+		}
+		last = c
+	}
+	if last == '-' || partlen > 63 {
+		return false
+	}
+	return nonNumeric
+}

proxy/wireguard/tun.go

@@ -1,303 +1,105 @@
-/* SPDX-License-Identifier: MIT
- *
- * Copyright (C) 2017-2022 WireGuard LLC. All Rights Reserved.
- */
-
 package wireguard
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net"
 	"net/netip"
-	"os"
+	"runtime"
+	"strconv"
+	"strings"
+	"sync"
 
-	"github.com/sagernet/wireguard-go/tun"
+	"github.com/xtls/xray-core/common/log"
-	"github.com/xtls/xray-core/features/dns"
+
-	"gvisor.dev/gvisor/pkg/buffer"
+	"golang.zx2c4.com/wireguard/conn"
-	"gvisor.dev/gvisor/pkg/tcpip"
+	"golang.zx2c4.com/wireguard/device"
-	"gvisor.dev/gvisor/pkg/tcpip/adapters/gonet"
+	"golang.zx2c4.com/wireguard/tun"
-	"gvisor.dev/gvisor/pkg/tcpip/header"
-	"gvisor.dev/gvisor/pkg/tcpip/link/channel"
-	"gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
-	"gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
-	"gvisor.dev/gvisor/pkg/tcpip/stack"
-	"gvisor.dev/gvisor/pkg/tcpip/transport/tcp"
-	"gvisor.dev/gvisor/pkg/tcpip/transport/udp"
 )
 
-type netTun struct {
+type Tunnel interface {
-	ep             *channel.Endpoint
+	BuildDevice(ipc string, bind conn.Bind) error
-	stack          *stack.Stack
+	DialContextTCPAddrPort(ctx context.Context, addr netip.AddrPort) (net.Conn, error)
-	events         chan tun.Event
+	DialUDPAddrPort(laddr, raddr netip.AddrPort) (net.Conn, error)
-	incomingPacket chan *buffer.View
+	Close() error
-	mtu            int
-	dnsClient      dns.Client
-	hasV4, hasV6   bool
 }
 
-type Net netTun
+type tunnel struct {
-
+	tun    tun.Device
-func CreateNetTUN(localAddresses []netip.Addr, dnsClient dns.Client, mtu int) (tun.Device, *Net, error) {
+	device *device.Device
-	opts := stack.Options{
+	rw     sync.Mutex
-		NetworkProtocols:   []stack.NetworkProtocolFactory{ipv4.NewProtocol, ipv6.NewProtocol},
-		TransportProtocols: []stack.TransportProtocolFactory{tcp.NewProtocol, udp.NewProtocol},
-		HandleLocal:        true,
-	}
-	dev := &netTun{
-		ep:             channel.New(1024, uint32(mtu), ""),
-		stack:          stack.New(opts),
-		events:         make(chan tun.Event, 10),
-		incomingPacket: make(chan *buffer.View),
-		dnsClient:      dnsClient,
-		mtu:            mtu,
-	}
-	dev.ep.AddNotify(dev)
-	tcpipErr := dev.stack.CreateNIC(1, dev.ep)
-	if tcpipErr != nil {
-		return nil, nil, fmt.Errorf("CreateNIC: %v", tcpipErr)
-	}
-	for _, ip := range localAddresses {
-		var protoNumber tcpip.NetworkProtocolNumber
-		if ip.Is4() {
-			protoNumber = ipv4.ProtocolNumber
-		} else if ip.Is6() {
-			protoNumber = ipv6.ProtocolNumber
-		}
-		protoAddr := tcpip.ProtocolAddress{
-			Protocol:          protoNumber,
-			AddressWithPrefix: tcpip.AddrFromSlice(ip.AsSlice()).WithPrefix(),
-		}
-		tcpipErr := dev.stack.AddProtocolAddress(1, protoAddr, stack.AddressProperties{})
-		if tcpipErr != nil {
-			return nil, nil, fmt.Errorf("AddProtocolAddress(%v): %v", ip, tcpipErr)
-		}
-		if ip.Is4() {
-			dev.hasV4 = true
-		} else if ip.Is6() {
-			dev.hasV6 = true
-		}
-	}
-	if dev.hasV4 {
-		dev.stack.AddRoute(tcpip.Route{Destination: header.IPv4EmptySubnet, NIC: 1})
-	}
-	if dev.hasV6 {
-		dev.stack.AddRoute(tcpip.Route{Destination: header.IPv6EmptySubnet, NIC: 1})
-	}
-
-	dev.events <- tun.EventUp
-	return dev, (*Net)(dev), nil
 }
 
-func (tun *netTun) Name() (string, error) {
+func (t *tunnel) BuildDevice(ipc string, bind conn.Bind) (err error) {
-	return "go", nil
+	t.rw.Lock()
-}
+	defer t.rw.Unlock()
 
-func (tun *netTun) File() *os.File {
+	if t.device != nil {
+		return errors.New("device is already initialized")
+	}
+
+	logger := &device.Logger{
+		Verbosef: func(format string, args ...any) {
+			log.Record(&log.GeneralMessage{
+				Severity: log.Severity_Debug,
+				Content:  fmt.Sprintf(format, args...),
+			})
+		},
+		Errorf: func(format string, args ...any) {
+			log.Record(&log.GeneralMessage{
+				Severity: log.Severity_Error,
+				Content:  fmt.Sprintf(format, args...),
+			})
+		},
+	}
+
+	t.device = device.NewDevice(t.tun, bind, logger)
+	if err = t.device.IpcSet(ipc); err != nil {
+		return err
+	}
+	if err = t.device.Up(); err != nil {
+		return err
+	}
 	return nil
 }
 
-func (tun *netTun) Events() chan tun.Event {
+func (t *tunnel) Close() (err error) {
-	return tun.events
+	t.rw.Lock()
-}
+	defer t.rw.Unlock()
 
-func (tun *netTun) Read(buf []byte, offset int) (int, error) {
+	if t.device == nil {
-	view, ok := <-tun.incomingPacket
+		return nil
-	if !ok {
-		return 0, os.ErrClosed
 	}
 
-	return view.Read(buf[offset:])
+	t.device.Close()
+	t.device = nil
+	err = t.tun.Close()
+	t.tun = nil
+	return nil
 }
 
-func (tun *netTun) Write(buf []byte, offset int) (int, error) {
+func CalculateInterfaceName(name string) (tunName string) {
-	packet := buf[offset:]
+	if runtime.GOOS == "darwin" {
-	if len(packet) == 0 {
+		tunName = "utun"
-		return 0, nil
+	} else if name != "" {
+		tunName = name
+	} else {
+		tunName = "tun"
 	}
-
+	interfaces, err := net.Interfaces()
-	pkb := stack.NewPacketBuffer(stack.PacketBufferOptions{Payload: buffer.MakeWithData(packet)})
+	if err != nil {
-	switch packet[0] >> 4 {
-	case 4:
-		tun.ep.InjectInbound(header.IPv4ProtocolNumber, pkb)
-	case 6:
-		tun.ep.InjectInbound(header.IPv6ProtocolNumber, pkb)
-	}
-
-	return len(buf), nil
-}
-
-func (tun *netTun) WriteNotify() {
-	pkt := tun.ep.Read()
-	if pkt == nil {
 		return
 	}
-
+	var tunIndex int
-	view := pkt.ToView()
+	for _, netInterface := range interfaces {
-	pkt.DecRef()
+		if strings.HasPrefix(netInterface.Name, tunName) {
-
+			index, parseErr := strconv.ParseInt(netInterface.Name[len(tunName):], 10, 16)
-	tun.incomingPacket <- view
+			if parseErr == nil {
-}
+				tunIndex = int(index) + 1
-
-func (tun *netTun) Flush() error {
-	return nil
-}
-
-func (tun *netTun) Close() error {
-	tun.stack.RemoveNIC(1)
-
-	if tun.events != nil {
-		close(tun.events)
 			}
-
-	tun.ep.Close()
-
-	if tun.incomingPacket != nil {
-		close(tun.incomingPacket)
 		}
-
-	return nil
-}
-
-func (tun *netTun) MTU() (int, error) {
-	return tun.mtu, nil
-}
-
-func convertToFullAddr(endpoint netip.AddrPort) (tcpip.FullAddress, tcpip.NetworkProtocolNumber) {
-	var protoNumber tcpip.NetworkProtocolNumber
-	if endpoint.Addr().Is4() {
-		protoNumber = ipv4.ProtocolNumber
-	} else {
-		protoNumber = ipv6.ProtocolNumber
 	}
-	return tcpip.FullAddress{
+	tunName = fmt.Sprintf("%s%d", tunName, tunIndex)
-		NIC:  1,
+	return
-		Addr: tcpip.AddrFromSlice(endpoint.Addr().AsSlice()),
-		Port: endpoint.Port(),
-	}, protoNumber
-}
-
-func (net *Net) DialContextTCPAddrPort(ctx context.Context, addr netip.AddrPort) (*gonet.TCPConn, error) {
-	fa, pn := convertToFullAddr(addr)
-	return gonet.DialContextTCP(ctx, net.stack, fa, pn)
-}
-
-func (net *Net) DialContextTCP(ctx context.Context, addr *net.TCPAddr) (*gonet.TCPConn, error) {
-	if addr == nil {
-		return net.DialContextTCPAddrPort(ctx, netip.AddrPort{})
-	}
-	ip, _ := netip.AddrFromSlice(addr.IP)
-	return net.DialContextTCPAddrPort(ctx, netip.AddrPortFrom(ip, uint16(addr.Port)))
-}
-
-func (net *Net) DialTCPAddrPort(addr netip.AddrPort) (*gonet.TCPConn, error) {
-	fa, pn := convertToFullAddr(addr)
-	return gonet.DialTCP(net.stack, fa, pn)
-}
-
-func (net *Net) DialTCP(addr *net.TCPAddr) (*gonet.TCPConn, error) {
-	if addr == nil {
-		return net.DialTCPAddrPort(netip.AddrPort{})
-	}
-	ip, _ := netip.AddrFromSlice(addr.IP)
-	return net.DialTCPAddrPort(netip.AddrPortFrom(ip, uint16(addr.Port)))
-}
-
-func (net *Net) ListenTCPAddrPort(addr netip.AddrPort) (*gonet.TCPListener, error) {
-	fa, pn := convertToFullAddr(addr)
-	return gonet.ListenTCP(net.stack, fa, pn)
-}
-
-func (net *Net) ListenTCP(addr *net.TCPAddr) (*gonet.TCPListener, error) {
-	if addr == nil {
-		return net.ListenTCPAddrPort(netip.AddrPort{})
-	}
-	ip, _ := netip.AddrFromSlice(addr.IP)
-	return net.ListenTCPAddrPort(netip.AddrPortFrom(ip, uint16(addr.Port)))
-}
-
-func (net *Net) DialUDPAddrPort(laddr, raddr netip.AddrPort) (*gonet.UDPConn, error) {
-	var lfa, rfa *tcpip.FullAddress
-	var pn tcpip.NetworkProtocolNumber
-	if laddr.IsValid() || laddr.Port() > 0 {
-		var addr tcpip.FullAddress
-		addr, pn = convertToFullAddr(laddr)
-		lfa = &addr
-	}
-	if raddr.IsValid() || raddr.Port() > 0 {
-		var addr tcpip.FullAddress
-		addr, pn = convertToFullAddr(raddr)
-		rfa = &addr
-	}
-	return gonet.DialUDP(net.stack, lfa, rfa, pn)
-}
-
-func (net *Net) ListenUDPAddrPort(laddr netip.AddrPort) (*gonet.UDPConn, error) {
-	return net.DialUDPAddrPort(laddr, netip.AddrPort{})
-}
-
-func (net *Net) DialUDP(laddr, raddr *net.UDPAddr) (*gonet.UDPConn, error) {
-	var la, ra netip.AddrPort
-	if laddr != nil {
-		ip, _ := netip.AddrFromSlice(laddr.IP)
-		la = netip.AddrPortFrom(ip, uint16(laddr.Port))
-	}
-	if raddr != nil {
-		ip, _ := netip.AddrFromSlice(raddr.IP)
-		ra = netip.AddrPortFrom(ip, uint16(raddr.Port))
-	}
-	return net.DialUDPAddrPort(la, ra)
-}
-
-func (net *Net) ListenUDP(laddr *net.UDPAddr) (*gonet.UDPConn, error) {
-	return net.DialUDP(laddr, nil)
-}
-
-func (n *Net) HasV4() bool {
-	return n.hasV4
-}
-
-func (n *Net) HasV6() bool {
-	return n.hasV6
-}
-
-func IsDomainName(s string) bool {
-	l := len(s)
-	if l == 0 || l > 254 || l == 254 && s[l-1] != '.' {
-		return false
-	}
-	last := byte('.')
-	nonNumeric := false
-	partlen := 0
-	for i := 0; i < len(s); i++ {
-		c := s[i]
-		switch {
-		default:
-			return false
-		case 'a' <= c && c <= 'z' || 'A' <= c && c <= 'Z' || c == '_':
-			nonNumeric = true
-			partlen++
-		case '0' <= c && c <= '9':
-			partlen++
-		case c == '-':
-			if last == '.' {
-				return false
-			}
-			partlen++
-			nonNumeric = true
-		case c == '.':
-			if last == '.' || last == '-' {
-				return false
-			}
-			if partlen > 63 || partlen == 0 {
-				return false
-			}
-			partlen = 0
-		}
-		last = c
-	}
-	if last == '-' || partlen > 63 {
-		return false
-	}
-	return nonNumeric
 }

proxy/wireguard/tun_default.go

@@ -0,0 +1,42 @@
+//go:build !linux
+
+package wireguard
+
+import (
+	"context"
+	"net"
+	"net/netip"
+
+	"golang.zx2c4.com/wireguard/tun/netstack"
+)
+
+var _ Tunnel = (*gvisorNet)(nil)
+
+type gvisorNet struct {
+	tunnel
+	net *netstack.Net
+}
+
+func (g *gvisorNet) Close() error {
+	return g.tunnel.Close()
+}
+
+func (g *gvisorNet) DialContextTCPAddrPort(ctx context.Context, addr netip.AddrPort) (
+	net.Conn, error,
+) {
+	return g.net.DialContextTCPAddrPort(ctx, addr)
+}
+
+func (g *gvisorNet) DialUDPAddrPort(laddr, raddr netip.AddrPort) (net.Conn, error) {
+	return g.net.DialUDPAddrPort(laddr, raddr)
+}
+
+func CreateTun(localAddresses []netip.Addr, mtu int) (Tunnel, error) {
+	out := &gvisorNet{}
+	tun, n, err := netstack.CreateNetTUN(localAddresses, nil, mtu)
+	if err != nil {
+		return nil, err
+	}
+	out.tun, out.net = tun, n
+	return out, nil
+}

proxy/wireguard/tun_linux.go

@@ -0,0 +1,223 @@
+package wireguard
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net"
+	"net/netip"
+	"os"
+
+	"golang.org/x/sys/unix"
+
+	"github.com/sagernet/sing/common/control"
+	"github.com/vishvananda/netlink"
+	wgtun "golang.zx2c4.com/wireguard/tun"
+)
+
+type deviceNet struct {
+	tunnel
+	dialer net.Dialer
+
+	handle    *netlink.Handle
+	linkAddrs []netlink.Addr
+	routes    []*netlink.Route
+	rules     []*netlink.Rule
+}
+
+func newDeviceNet(interfaceName string) *deviceNet {
+	var dialer net.Dialer
+	bindControl := control.BindToInterface(control.DefaultInterfaceFinder(), interfaceName, -1)
+	dialer.Control = control.Append(dialer.Control, bindControl)
+	return &deviceNet{dialer: dialer}
+}
+
+func (d *deviceNet) DialContextTCPAddrPort(ctx context.Context, addr netip.AddrPort) (
+	net.Conn, error,
+) {
+	return d.dialer.DialContext(ctx, "tcp", addr.String())
+}
+
+func (d *deviceNet) DialUDPAddrPort(laddr, raddr netip.AddrPort) (net.Conn, error) {
+	dialer := d.dialer
+	dialer.LocalAddr = &net.UDPAddr{IP: laddr.Addr().AsSlice(), Port: int(laddr.Port())}
+	return dialer.DialContext(context.Background(), "udp", raddr.String())
+}
+
+func (d *deviceNet) Close() (err error) {
+	var errs []error
+	for _, rule := range d.rules {
+		if err = d.handle.RuleDel(rule); err != nil {
+			errs = append(errs, fmt.Errorf("failed to delete rule: %w", err))
+		}
+	}
+	for _, route := range d.routes {
+		if err = d.handle.RouteDel(route); err != nil {
+			errs = append(errs, fmt.Errorf("failed to delete route: %w", err))
+		}
+	}
+	if err = d.tunnel.Close(); err != nil {
+		errs = append(errs, fmt.Errorf("failed to close tunnel: %w", err))
+	}
+	if d.handle != nil {
+		d.handle.Close()
+		d.handle = nil
+	}
+	if len(errs) == 0 {
+		return nil
+	}
+	return errors.Join(errs...)
+}
+
+func CreateTun(localAddresses []netip.Addr, mtu int) (t Tunnel, err error) {
+	var v4, v6 *netip.Addr
+	for _, prefixes := range localAddresses {
+		if v4 == nil && prefixes.Is4() {
+			x := prefixes
+			v4 = &x
+		}
+		if v6 == nil && prefixes.Is6() {
+			x := prefixes
+			v6 = &x
+		}
+	}
+
+	writeSysctlZero := func(path string) error {
+		_, err := os.Stat(path)
+		if os.IsNotExist(err) {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+		return os.WriteFile(path, []byte("0"), 0o644)
+	}
+
+	// system configs.
+	if v4 != nil {
+		if err = writeSysctlZero("/proc/sys/net/ipv4/conf/all/rp_filter"); err != nil {
+			return nil, fmt.Errorf("failed to disable ipv4 rp_filter for all: %w", err)
+		}
+	}
+	if v6 != nil {
+		if err = writeSysctlZero("/proc/sys/net/ipv6/conf/all/disable_ipv6"); err != nil {
+			return nil, fmt.Errorf("failed to enable ipv6: %w", err)
+		}
+		if err = writeSysctlZero("/proc/sys/net/ipv6/conf/all/rp_filter"); err != nil {
+			return nil, fmt.Errorf("failed to disable ipv6 rp_filter for all: %w", err)
+		}
+	}
+
+	n := CalculateInterfaceName("wg")
+	wgt, err := wgtun.CreateTUN(n, mtu)
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		if err != nil {
+			_ = wgt.Close()
+		}
+	}()
+
+	// disable linux rp_filter for tunnel device to avoid packet drop.
+	// the operation require root privilege on container require '--privileged' flag.
+	if v4 != nil {
+		if err = writeSysctlZero("/proc/sys/net/ipv4/conf/" + n + "/rp_filter"); err != nil {
+			return nil, fmt.Errorf("failed to disable ipv4 rp_filter for tunnel: %w", err)
+		}
+	}
+	if v6 != nil {
+		if err = writeSysctlZero("/proc/sys/net/ipv6/conf/" + n + "/rp_filter"); err != nil {
+			return nil, fmt.Errorf("failed to disable ipv6 rp_filter for tunnel: %w", err)
+		}
+	}
+
+	ipv6TableIndex := 1023
+	if v6 != nil {
+		r := &netlink.Route{Table: ipv6TableIndex}
+		for {
+			routeList, fErr := netlink.RouteListFiltered(netlink.FAMILY_V6, r, netlink.RT_FILTER_TABLE)
+			if len(routeList) == 0 || fErr != nil {
+				break
+			}
+			ipv6TableIndex--
+			if ipv6TableIndex < 0 {
+				return nil, fmt.Errorf("failed to find available ipv6 table index")
+			}
+		}
+	}
+
+	out := newDeviceNet(n)
+	out.handle, err = netlink.NewHandle()
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		if err != nil {
+			_ = out.Close()
+		}
+	}()
+
+	l, err := netlink.LinkByName(n)
+	if err != nil {
+		return nil, err
+	}
+
+	if v4 != nil {
+		addr := netlink.Addr{
+			IPNet: &net.IPNet{
+				IP:   v4.AsSlice(),
+				Mask: net.CIDRMask(v4.BitLen(), v4.BitLen()),
+			},
+		}
+		out.linkAddrs = append(out.linkAddrs, addr)
+	}
+	if v6 != nil {
+		addr := netlink.Addr{
+			IPNet: &net.IPNet{
+				IP:   v6.AsSlice(),
+				Mask: net.CIDRMask(v6.BitLen(), v6.BitLen()),
+			},
+		}
+		out.linkAddrs = append(out.linkAddrs, addr)
+
+		rt := &netlink.Route{
+			LinkIndex: l.Attrs().Index,
+			Dst: &net.IPNet{
+				IP:   net.IPv6zero,
+				Mask: net.CIDRMask(0, 128),
+			},
+			Table: ipv6TableIndex,
+		}
+		out.routes = append(out.routes, rt)
+
+		r := netlink.NewRule()
+		r.Table, r.Family, r.Src = ipv6TableIndex, unix.AF_INET6, addr.IPNet
+		out.rules = append(out.rules, r)
+	}
+
+	for _, addr := range out.linkAddrs {
+		if err = out.handle.AddrAdd(l, &addr); err != nil {
+			return nil, fmt.Errorf("failed to add address %s to %s: %w", addr, n, err)
+		}
+	}
+	if err = out.handle.LinkSetMTU(l, mtu); err != nil {
+		return nil, err
+	}
+	if err = out.handle.LinkSetUp(l); err != nil {
+		return nil, err
+	}
+
+	for _, route := range out.routes {
+		if err = out.handle.RouteAdd(route); err != nil {
+			return nil, fmt.Errorf("failed to add route %s: %w", route, err)
+		}
+	}
+	for _, rule := range out.rules {
+		if err = out.handle.RuleAdd(rule); err != nil {
+			return nil, fmt.Errorf("failed to add rule %s: %w", rule, err)
+		}
+	}
+	out.tun = wgt
+	return out, nil
+}

proxy/wireguard/wireguard.go

@@ -24,10 +24,11 @@ import (
 	"bytes"
 	"context"
 	"fmt"
+	stdnet "net"
 	"net/netip"
 	"strings"
+	"sync"
 
-	"github.com/sagernet/wireguard-go/device"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/log"
@@ -46,13 +47,15 @@ import (
 // Handler is an outbound connection that silently swallow the entire payload.
 type Handler struct {
 	conf          *DeviceConfig
-	net           *Net
+	net           Tunnel
 	bind          *netBindClient
 	policyManager policy.Manager
 	dns           dns.Client
 	// cached configuration
 	ipc              string
 	endpoints        []netip.Addr
+	hasIPv4, hasIPv6 bool
+	wgLock           sync.Mutex
 }
 
 // New creates a new wireguard handler.
@@ -64,15 +67,71 @@ func New(ctx context.Context, conf *DeviceConfig) (*Handler, error) {
 		return nil, err
 	}
 
+	hasIPv4, hasIPv6 := false, false
+	for _, e := range endpoints {
+		if e.Is4() {
+			hasIPv4 = true
+		}
+		if e.Is6() {
+			hasIPv6 = true
+		}
+	}
+
+	d := v.GetFeature(dns.ClientType()).(dns.Client)
 	return &Handler{
 		conf:          conf,
 		policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
-		dns:           v.GetFeature(dns.ClientType()).(dns.Client),
+		dns:           d,
-		ipc:           createIPCRequest(conf),
+		ipc:           createIPCRequest(conf, d, hasIPv6),
 		endpoints:     endpoints,
+		hasIPv4:       hasIPv4,
+		hasIPv6:       hasIPv6,
 	}, nil
 }
 
+func (h *Handler) processWireGuard(dialer internet.Dialer) (err error) {
+	h.wgLock.Lock()
+	defer h.wgLock.Unlock()
+
+	if h.bind != nil && h.bind.dialer == dialer && h.net != nil {
+		return nil
+	}
+
+	log.Record(&log.GeneralMessage{
+		Severity: log.Severity_Info,
+		Content:  "switching dialer",
+	})
+
+	if h.net != nil {
+		_ = h.net.Close()
+		h.net = nil
+	}
+	if h.bind != nil {
+		_ = h.bind.Close()
+		h.bind = nil
+	}
+
+	// bind := conn.NewStdNetBind() // TODO: conn.Bind wrapper for dialer
+	bind := &netBindClient{
+		dialer:   dialer,
+		workers:  int(h.conf.NumWorkers),
+		dns:      h.dns,
+		reserved: h.conf.Reserved,
+	}
+	defer func() {
+		if err != nil {
+			_ = bind.Close()
+		}
+	}()
+
+	h.net, err = h.makeVirtualTun(bind)
+	if err != nil {
+		return newError("failed to create virtual tun interface").Base(err)
+	}
+	h.bind = bind
+	return nil
+}
+
 // Process implements OutboundHandler.Dispatch().
 func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer internet.Dialer) error {
 	outbound := session.OutboundFromContext(ctx)
@@ -85,30 +144,8 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 		inbound.SetCanSpliceCopy(3)
 	}
 
-	if h.bind == nil || h.bind.dialer != dialer || h.net == nil {
+	if err := h.processWireGuard(dialer); err != nil {
-		log.Record(&log.GeneralMessage{
+		return err
-			Severity: log.Severity_Info,
-			Content:  "switching dialer",
-		})
-		// bind := conn.NewStdNetBind() // TODO: conn.Bind wrapper for dialer
-		bind := &netBindClient{
-			dialer:   dialer,
-			workers:  int(h.conf.NumWorkers),
-			dns:      h.dns,
-			reserved: h.conf.Reserved,
-		}
-
-		net, err := h.makeVirtualTun(bind)
-		if err != nil {
-			bind.Close()
-			return newError("failed to create virtual tun interface").Base(err)
-		}
-
-		h.net = net
-		if h.bind != nil {
-			h.bind.Close()
-		}
-		h.bind = bind
 	}
 
 	// Destination of the inner request.
@@ -122,8 +159,8 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 	addr := destination.Address
 	if addr.Family().IsDomain() {
 		ips, err := h.dns.LookupIP(addr.Domain(), dns.IPOption{
-			IPv4Enable: h.net.HasV4(),
+			IPv4Enable: h.hasIPv4,
-			IPv6Enable: h.net.HasV6(),
+			IPv6Enable: h.hasIPv6,
 		})
 		if err != nil {
 			return newError("failed to lookup DNS").Base(err)
@@ -200,14 +237,26 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 }
 
 // serialize the config into an IPC request
-func createIPCRequest(conf *DeviceConfig) string {
+func createIPCRequest(conf *DeviceConfig, d dns.Client, resolveEndPointToV4 bool) string {
 	var request bytes.Buffer
 
 	request.WriteString(fmt.Sprintf("private_key=%s\n", conf.SecretKey))
 
 	for _, peer := range conf.Peers {
+		endpoint := peer.Endpoint
+		host, port, err := net.SplitHostPort(endpoint)
+		if resolveEndPointToV4 && err == nil {
+			_, err = netip.ParseAddr(host)
+			if err != nil {
+				ipList, err := d.LookupIP(host, dns.IPOption{IPv4Enable: true, IPv6Enable: false})
+				if err == nil && len(ipList) > 0 {
+					endpoint = stdnet.JoinHostPort(ipList[0].String(), port)
+				}
+			}
+		}
+
 		request.WriteString(fmt.Sprintf("public_key=%s\nendpoint=%s\npersistent_keepalive_interval=%d\npreshared_key=%s\n",
-			peer.PublicKey, peer.Endpoint, peer.KeepAlive, peer.PreSharedKey))
+			peer.PublicKey, endpoint, peer.KeepAlive, peer.PreSharedKey))
 
 		for _, ip := range peer.AllowedIps {
 			request.WriteString(fmt.Sprintf("allowed_ip=%s\n", ip))
@@ -245,41 +294,20 @@ func parseEndpoints(conf *DeviceConfig) ([]netip.Addr, error) {
 }
 
 // creates a tun interface on netstack given a configuration
-func (h *Handler) makeVirtualTun(bind *netBindClient) (*Net, error) {
+func (h *Handler) makeVirtualTun(bind *netBindClient) (Tunnel, error) {
-	tun, tnet, err := CreateNetTUN(h.endpoints, h.dns, int(h.conf.Mtu))
+	t, err := CreateTun(h.endpoints, int(h.conf.Mtu))
 	if err != nil {
 		return nil, err
 	}
 
-	bind.dnsOption.IPv4Enable = tnet.HasV4()
+	bind.dnsOption.IPv4Enable = h.hasIPv4
-	bind.dnsOption.IPv6Enable = tnet.HasV6()
+	bind.dnsOption.IPv6Enable = h.hasIPv6
 
-	// dev := device.NewDevice(tun, conn.NewDefaultBind(), nil /* device.NewLogger(device.LogLevelVerbose, "") */)
+	if err = t.BuildDevice(h.ipc, bind); err != nil {
-	dev := device.NewDevice(tun, bind, &device.Logger{
+		_ = t.Close()
-		Verbosef: func(format string, args ...any) {
-			log.Record(&log.GeneralMessage{
-				Severity: log.Severity_Debug,
-				Content:  fmt.Sprintf(format, args...),
-			})
-		},
-		Errorf: func(format string, args ...any) {
-			log.Record(&log.GeneralMessage{
-				Severity: log.Severity_Error,
-				Content:  fmt.Sprintf(format, args...),
-			})
-		},
-	}, int(h.conf.NumWorkers))
-	err = dev.IpcSet(h.ipc)
-	if err != nil {
 		return nil, err
 	}
-
+	return t, nil
-	err = dev.Up()
-	if err != nil {
-		return nil, err
-	}
-
-	return tnet, nil
 }
 
 func init() {