save

.golangci.yml

@@ -21,7 +21,7 @@ linters-settings:
       - -SA1003
 
 run:
-  go: "1.23"
+  go: "1.24"
   build-tags:
     - with_gvisor
     - with_quic

adapter/outbound.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing-tun"
 	N "github.com/sagernet/sing/common/network"
 )
 
@@ -18,6 +19,11 @@ type Outbound interface {
 	N.Dialer
 }
 
+type DirectRouteOutbound interface {
+	Outbound
+	NewDirectRouteConnection(metadata InboundContext, routeContext tun.DirectRouteContext) (tun.DirectRouteDestination, error)
+}
+
 type OutboundRegistry interface {
 	option.OutboundOptionsRegistry
 	CreateOutbound(ctx context.Context, router Router, logger log.ContextLogger, tag string, outboundType string, options any) (Outbound, error)

adapter/router.go

@@ -8,6 +8,7 @@ import (
 	"sync"
 
 	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-tun"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
 	"github.com/sagernet/sing/common/ntp"
@@ -19,7 +20,7 @@ import (
 type Router interface {
 	Lifecycle
 	ConnectionRouter
-	PreMatch(metadata InboundContext) error
+	PreMatch(metadata InboundContext, context tun.DirectRouteContext) (tun.DirectRouteDestination, error)
 	ConnectionRouterEx
 	RuleSet(tag string) (RuleSet, bool)
 	NeedWIFIState() bool

docs/configuration/endpoint/tailscale.md

@@ -37,6 +37,10 @@ Example: `$HOME/.tailscale`
 
 #### auth_key
 
+!!! note
+    
+    Auth key is not required. By default, sing-box will log the login URL (or popup a notification on graphical clients).
+
 The auth key to create the node. If the node is already created (from state previously stored), then this field is not
 used.
 

docs/configuration/outbound/hysteria.md

@@ -1,3 +1,12 @@
+---
+icon: material/new-box
+---
+
+!!! quote "Changes in sing-box 1.12.0"
+
+    :material-plus: [server_ports](#server_ports)  
+    :material-plus: [hop_interval](#hop_interval)
+
 ### Structure
 
 ```json
@@ -7,6 +16,10 @@
   
   "server": "127.0.0.1",
   "server_port": 1080,
+  "server_ports": [
+    "2080:3000"
+  ],
+  "hop_interval": "",
   "up": "100 Mbps",
   "up_mbps": 100,
   "down": "100 Mbps",
@@ -38,6 +51,22 @@ The server address.
 
 The server port.
 
+#### server_ports
+
+!!! question "Since sing-box 1.12.0"
+
+Server port range list.
+
+Conflicts with `server_port`.
+
+#### hop_interval
+
+!!! question "Since sing-box 1.12.0"
+
+Port hopping interval.
+
+`30s` is used by default.
+
 #### up, down
 
 ==Required==

docs/configuration/outbound/hysteria.zh.md

@@ -1,3 +1,12 @@
+---
+icon: material/new-box
+---
+
+!!! quote "sing-box 1.12.0 中的更改"
+
+    :material-plus: [server_ports](#server_ports)  
+    :material-plus: [hop_interval](#hop_interval)
+
 ### 结构
 
 ```json
@@ -7,6 +16,10 @@
   
   "server": "127.0.0.1",
   "server_port": 1080,
+  "server_ports": [
+    "2080:3000"
+  ],
+  "hop_interval": "",
   "up": "100 Mbps",
   "up_mbps": 100,
   "down": "100 Mbps",
@@ -38,6 +51,22 @@
 
 服务器端口。
 
+#### server_ports
+
+!!! question "自 sing-box 1.12.0 起"
+
+服务器端口范围列表。
+
+与 `server_port` 冲突。
+
+#### hop_interval
+
+!!! question "自 sing-box 1.12.0 起"
+
+端口跳跃间隔。
+
+默认使用 `30s`。
+
 #### up, down
 
 ==必填==

go.mod

@@ -25,16 +25,16 @@ require (
 	github.com/sagernet/cors v1.2.1
 	github.com/sagernet/fswatch v0.1.1
 	github.com/sagernet/gomobile v0.1.4
-	github.com/sagernet/gvisor v0.0.0-20241123041152-536d05261cff
+	github.com/sagernet/gvisor v0.0.0-20250217052116-ed66b6946f72
 	github.com/sagernet/quic-go v0.49.0-beta.1
 	github.com/sagernet/reality v0.0.0-20230406110435-ee17307e7691
 	github.com/sagernet/sing v0.6.2-0.20250210105917-3464ed3babc0
 	github.com/sagernet/sing-mux v0.3.1
-	github.com/sagernet/sing-quic v0.4.0
+	github.com/sagernet/sing-quic v0.4.1-beta.1
 	github.com/sagernet/sing-shadowsocks v0.2.7
 	github.com/sagernet/sing-shadowsocks2 v0.2.0
 	github.com/sagernet/sing-shadowtls v0.2.0
-	github.com/sagernet/sing-tun v0.6.1
+	github.com/sagernet/sing-tun v0.6.2-0.20250217135654-784bb584392f
 	github.com/sagernet/sing-vmess v0.2.0
 	github.com/sagernet/smux v0.0.0-20231208180855-7041f6ea79e7
 	github.com/sagernet/tailscale v1.79.0-mod.1

go.sum

@@ -171,8 +171,8 @@ github.com/sagernet/fswatch v0.1.1 h1:YqID+93B7VRfqIH3PArW/XpJv5H4OLEVWDfProGoRQ
 github.com/sagernet/fswatch v0.1.1/go.mod h1:nz85laH0mkQqJfaOrqPpkwtU1znMFNVTpT/5oRsVz/o=
 github.com/sagernet/gomobile v0.1.4 h1:WzX9ka+iHdupMgy2Vdich+OAt7TM8C2cZbIbzNjBrJY=
 github.com/sagernet/gomobile v0.1.4/go.mod h1:Pqq2+ZVvs10U7xK+UwJgwYWUykewi8H6vlslAO73n9E=
-github.com/sagernet/gvisor v0.0.0-20241123041152-536d05261cff h1:mlohw3360Wg1BNGook/UHnISXhUx4Gd/3tVLs5T0nSs=
+github.com/sagernet/gvisor v0.0.0-20250217052116-ed66b6946f72 h1:Jgv6N59yiVMEwimTcFV1EVcu2Aa7R2Wh1ZAYNzWP2qA=
-github.com/sagernet/gvisor v0.0.0-20241123041152-536d05261cff/go.mod h1:ehZwnT2UpmOWAHFL48XdBhnd4Qu4hN2O3Ji0us3ZHMw=
+github.com/sagernet/gvisor v0.0.0-20250217052116-ed66b6946f72/go.mod h1:ehZwnT2UpmOWAHFL48XdBhnd4Qu4hN2O3Ji0us3ZHMw=
 github.com/sagernet/netlink v0.0.0-20240612041022-b9a21c07ac6a h1:ObwtHN2VpqE0ZNjr6sGeT00J8uU7JF4cNUdb44/Duis=
 github.com/sagernet/netlink v0.0.0-20240612041022-b9a21c07ac6a/go.mod h1:xLnfdiJbSp8rNqYEdIW/6eDO4mVoogml14Bh2hSiFpM=
 github.com/sagernet/nftables v0.3.0-beta.4 h1:kbULlAwAC3jvdGAC1P5Fa3GSxVwQJibNenDW2zaXr8I=
@@ -186,16 +186,16 @@ github.com/sagernet/sing v0.6.2-0.20250210105917-3464ed3babc0 h1:8gTBdpb2JeNq4oA
 github.com/sagernet/sing v0.6.2-0.20250210105917-3464ed3babc0/go.mod h1:ARkL0gM13/Iv5VCZmci/NuoOlePoIsW0m7BWfln/Hak=
 github.com/sagernet/sing-mux v0.3.1 h1:kvCc8HyGAskDHDQ0yQvoTi/7J4cZPB/VJMsAM3MmdQI=
 github.com/sagernet/sing-mux v0.3.1/go.mod h1:Mkdz8LnDstthz0HWuA/5foncnDIdcNN5KZ6AdJX+x78=
-github.com/sagernet/sing-quic v0.4.0 h1:E4geazHk/UrJTXMlT+CBCKmn8V86RhtNeczWtfeoEFc=
+github.com/sagernet/sing-quic v0.4.1-beta.1 h1:V2VfMckT3EQR3ZdfSzJgZZDsvfZZH42QAZpnOnHKa0s=
-github.com/sagernet/sing-quic v0.4.0/go.mod h1:c+CytOEyeN20KCTFIP8YQUkNDVFLSzjrEPqP7Hlnxys=
+github.com/sagernet/sing-quic v0.4.1-beta.1/go.mod h1:c+CytOEyeN20KCTFIP8YQUkNDVFLSzjrEPqP7Hlnxys=
 github.com/sagernet/sing-shadowsocks v0.2.7 h1:zaopR1tbHEw5Nk6FAkM05wCslV6ahVegEZaKMv9ipx8=
 github.com/sagernet/sing-shadowsocks v0.2.7/go.mod h1:0rIKJZBR65Qi0zwdKezt4s57y/Tl1ofkaq6NlkzVuyE=
 github.com/sagernet/sing-shadowsocks2 v0.2.0 h1:wpZNs6wKnR7mh1wV9OHwOyUr21VkS3wKFHi+8XwgADg=
 github.com/sagernet/sing-shadowsocks2 v0.2.0/go.mod h1:RnXS0lExcDAovvDeniJ4IKa2IuChrdipolPYWBv9hWQ=
 github.com/sagernet/sing-shadowtls v0.2.0 h1:cLKe4OAOFwuhmAIuPLj//CIL7Q9js+pIDardhJ+/osk=
 github.com/sagernet/sing-shadowtls v0.2.0/go.mod h1:agU+Fw5X+xnWVyRHyFthoZCX3MfWKCFPm4JUf+1oaxo=
-github.com/sagernet/sing-tun v0.6.1 h1:4l0+gnEKcGjlWfUVTD+W0BRApqIny/lU2ZliurE+VMo=
+github.com/sagernet/sing-tun v0.6.2-0.20250217135654-784bb584392f h1:VEtmCNfk8RuZcYz/Xx63F2QjcgG3z/7Pa0uiJciQo+Y=
-github.com/sagernet/sing-tun v0.6.1/go.mod h1:fisFCbC4Vfb6HqQNcwPJi2CDK2bf0Xapyz3j3t4cnHE=
+github.com/sagernet/sing-tun v0.6.2-0.20250217135654-784bb584392f/go.mod h1:UiOi1ombGaAzWkGSgH4qcP7Zpq8FjWc1uQmleK8oPCE=
 github.com/sagernet/sing-vmess v0.2.0 h1:pCMGUXN2k7RpikQV65/rtXtDHzb190foTfF9IGTMZrI=
 github.com/sagernet/sing-vmess v0.2.0/go.mod h1:jDAZ0A0St1zVRkyvhAPRySOFfhC+4SQtO5VYyeFotgA=
 github.com/sagernet/smux v0.0.0-20231208180855-7041f6ea79e7 h1:DImB4lELfQhplLTxeq2z31Fpv8CQqqrUwTbrIRumZqQ=

option/hysteria.go

@@ -1,5 +1,7 @@
 package option
 
+import "github.com/sagernet/sing/common/json/badoption"
+
 type HysteriaInboundOptions struct {
 	ListenOptions
 	Up                  string         `json:"up,omitempty"`
@@ -24,16 +26,18 @@ type HysteriaUser struct {
 type HysteriaOutboundOptions struct {
 	DialerOptions
 	ServerOptions
-	Up                  string      `json:"up,omitempty"`
+	ServerPorts         badoption.Listable[string] `json:"server_ports,omitempty"`
-	UpMbps              int         `json:"up_mbps,omitempty"`
+	HopInterval         badoption.Duration         `json:"hop_interval,omitempty"`
-	Down                string      `json:"down,omitempty"`
+	Up                  string                     `json:"up,omitempty"`
-	DownMbps            int         `json:"down_mbps,omitempty"`
+	UpMbps              int                        `json:"up_mbps,omitempty"`
-	Obfs                string      `json:"obfs,omitempty"`
+	Down                string                     `json:"down,omitempty"`
-	Auth                []byte      `json:"auth,omitempty"`
+	DownMbps            int                        `json:"down_mbps,omitempty"`
-	AuthString          string      `json:"auth_str,omitempty"`
+	Obfs                string                     `json:"obfs,omitempty"`
-	ReceiveWindowConn   uint64      `json:"recv_window_conn,omitempty"`
+	Auth                []byte                     `json:"auth,omitempty"`
-	ReceiveWindow       uint64      `json:"recv_window,omitempty"`
+	AuthString          string                     `json:"auth_str,omitempty"`
-	DisableMTUDiscovery bool        `json:"disable_mtu_discovery,omitempty"`
+	ReceiveWindowConn   uint64                     `json:"recv_window_conn,omitempty"`
-	Network             NetworkList `json:"network,omitempty"`
+	ReceiveWindow       uint64                     `json:"recv_window,omitempty"`
+	DisableMTUDiscovery bool                       `json:"disable_mtu_discovery,omitempty"`
+	Network             NetworkList                `json:"network,omitempty"`
 	OutboundTLSOptionsContainer
 }

option/types.go

@@ -12,6 +12,11 @@ import (
 	mDNS "github.com/miekg/dns"
 )
 
+var (
+	DefaultNetworks   = []string{N.NetworkTCP, N.NetworkUDP}
+	DefaultIPNetworks = []string{N.NetworkTCP, N.NetworkUDP, N.NetworkICMPv4, N.NetworkICMPv6}
+)
+
 type NetworkList string
 
 func (v *NetworkList) UnmarshalJSON(content []byte) error {
@@ -37,9 +42,9 @@ func (v *NetworkList) UnmarshalJSON(content []byte) error {
 	return nil
 }
 
-func (v NetworkList) Build() []string {
+func (v NetworkList) Build(defaultNetworks []string) []string {
 	if v == "" {
-		return []string{N.NetworkTCP, N.NetworkUDP}
+		return defaultNetworks
 	}
 	return strings.Split(string(v), "\n")
 }

protocol/direct/inbound.go

@@ -60,7 +60,7 @@ func NewInbound(ctx context.Context, router adapter.Router, logger log.ContextLo
 	inbound.listener = listener.New(listener.Options{
 		Context:           ctx,
 		Logger:            logger,
-		Network:           options.Network.Build(),
+		Network:           options.Network.Build(option.DefaultIPNetworks),
 		Listen:            options.ListenOptions,
 		ConnectionHandler: inbound,
 		PacketHandler:     inbound,

protocol/direct/outbound.go

@@ -2,6 +2,7 @@ package direct
 
 import (
 	"context"
+	"github.com/sagernet/sing-tun"
 	"net"
 	"net/netip"
 	"time"
@@ -27,6 +28,7 @@ func RegisterOutbound(registry *outbound.Registry) {
 var (
 	_ N.ParallelDialer             = (*Outbound)(nil)
 	_ dialer.ParallelNetworkDialer = (*Outbound)(nil)
+	_ adapter.DirectRouteOutbound  = (*Outbound)(nil)
 )
 
 type Outbound struct {
@@ -50,7 +52,7 @@ func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextL
 		return nil, err
 	}
 	outbound := &Outbound{
-		Adapter: outbound.NewAdapterWithDialerOptions(C.TypeDirect, tag, []string{N.NetworkTCP, N.NetworkUDP}, options.DialerOptions),
+		Adapter: outbound.NewAdapterWithDialerOptions(C.TypeDirect, tag, option.DefaultIPNetworks, options.DialerOptions),
 		logger:  logger,
 		//nolint:staticcheck
 		domainStrategy: C.DomainStrategy(options.DomainStrategy),
@@ -242,6 +244,10 @@ func (h *Outbound) ListenSerialNetworkPacket(ctx context.Context, destination M.
 	return conn, newDestination, nil
 }
 
+func (h *Outbound) NewDirectRouteConnection(metadata adapter.InboundContext, routeContext tun.DirectRouteContext) (tun.DirectRouteDestination, error) {
+	
+}
+
 /*func (h *Outbound) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
 	if h.loopBack.CheckConn(metadata.Source.AddrPort(), M.AddrPortFromNet(conn.LocalAddr())) {
 		return E.New("reject loopback connection to ", metadata.Destination)

protocol/hysteria/outbound.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"net"
 	"os"
+	"time"
 
 	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-box/adapter/outbound"
@@ -51,7 +52,7 @@ func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextL
 	if err != nil {
 		return nil, err
 	}
-	networkList := options.Network.Build()
+	networkList := options.Network.Build(option.DefaultIPNetworks)
 	var password string
 	if options.AuthString != "" {
 		password = options.AuthString
@@ -76,17 +77,18 @@ func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextL
 		receiveBps = uint64(options.DownMbps) * hysteria.MbpsToBps
 	}
 	client, err := hysteria.NewClient(hysteria.ClientOptions{
-		Context:       ctx,
+		Context:             ctx,
-		Dialer:        outboundDialer,
+		Dialer:              outboundDialer,
-		Logger:        logger,
+		Logger:              logger,
-		ServerAddress: options.ServerOptions.Build(),
+		ServerAddress:       options.ServerOptions.Build(),
-		SendBPS:       sendBps,
+		ServerPorts:         options.ServerPorts,
-		ReceiveBPS:    receiveBps,
+		HopInterval:         time.Duration(options.HopInterval),
-		XPlusPassword: options.Obfs,
+		SendBPS:             sendBps,
-		Password:      password,
+		ReceiveBPS:          receiveBps,
-		TLSConfig:     tlsConfig,
+		XPlusPassword:       options.Obfs,
-		UDPDisabled:   !common.Contains(networkList, N.NetworkUDP),
+		Password:            password,
-
+		TLSConfig:           tlsConfig,
+		UDPDisabled:         !common.Contains(networkList, N.NetworkUDP),
 		ConnReceiveWindow:   options.ReceiveWindowConn,
 		StreamReceiveWindow: options.ReceiveWindow,
 		DisableMTUDiscovery: options.DisableMTUDiscovery,

protocol/hysteria2/outbound.go

@@ -64,7 +64,7 @@ func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextL
 	if err != nil {
 		return nil, err
 	}
-	networkList := options.Network.Build()
+	networkList := options.Network.Build(option.DefaultIPNetworks)
 	client, err := hysteria2.NewClient(hysteria2.ClientOptions{
 		Context:            ctx,
 		Dialer:             outboundDialer,

protocol/naive/inbound.go

@@ -57,7 +57,7 @@ func NewInbound(ctx context.Context, router adapter.Router, logger log.ContextLo
 			Listen:  options.ListenOptions,
 		}),
 		networkIsDefault: options.Network == "",
-		network:          options.Network.Build(),
+		network:          options.Network.Build(option.DefaultIPNetworks),
 		authenticator:    auth.NewAuthenticator(options.Users),
 	}
 	if common.Contains(inbound.network, N.NetworkUDP) {

protocol/redirect/tproxy.go

@@ -53,7 +53,7 @@ func NewTProxy(ctx context.Context, router adapter.Router, logger log.ContextLog
 	tproxy.listener = listener.New(listener.Options{
 		Context:           ctx,
 		Logger:            logger,
-		Network:           options.Network.Build(),
+		Network:           options.Network.Build(option.DefaultIPNetworks),
 		Listen:            options.ListenOptions,
 		ConnectionHandler: tproxy,
 		OOBPacketHandler:  tproxy,

protocol/shadowsocks/inbound.go

@@ -84,7 +84,7 @@ func newInbound(ctx context.Context, router adapter.Router, logger log.ContextLo
 	inbound.listener = listener.New(listener.Options{
 		Context:                  ctx,
 		Logger:                   logger,
-		Network:                  options.Network.Build(),
+		Network:                  options.Network.Build(option.DefaultIPNetworks),
 		Listen:                   options.ListenOptions,
 		ConnectionHandler:        inbound,
 		PacketHandler:            inbound,

protocol/shadowsocks/inbound_multi.go

@@ -92,7 +92,7 @@ func newMultiInbound(ctx context.Context, router adapter.Router, logger log.Cont
 	inbound.listener = listener.New(listener.Options{
 		Context:                  ctx,
 		Logger:                   logger,
-		Network:                  options.Network.Build(),
+		Network:                  options.Network.Build(option.DefaultIPNetworks),
 		Listen:                   options.ListenOptions,
 		ConnectionHandler:        inbound,
 		PacketHandler:            inbound,

protocol/shadowsocks/inbound_relay.go

@@ -77,7 +77,7 @@ func newRelayInbound(ctx context.Context, router adapter.Router, logger log.Cont
 	inbound.listener = listener.New(listener.Options{
 		Context:                  ctx,
 		Logger:                   logger,
-		Network:                  options.Network.Build(),
+		Network:                  options.Network.Build(option.DefaultIPNetworks),
 		Listen:                   options.ListenOptions,
 		ConnectionHandler:        inbound,
 		PacketHandler:            inbound,

protocol/shadowsocks/outbound.go

@@ -49,7 +49,7 @@ func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextL
 		return nil, err
 	}
 	outbound := &Outbound{
-		Adapter:    outbound.NewAdapterWithDialerOptions(C.TypeShadowsocks, tag, options.Network.Build(), options.DialerOptions),
+		Adapter:    outbound.NewAdapterWithDialerOptions(C.TypeShadowsocks, tag, options.Network.Build(option.DefaultIPNetworks), options.DialerOptions),
 		logger:     logger,
 		dialer:     outboundDialer,
 		method:     method,

protocol/socks/outbound.go

@@ -51,7 +51,7 @@ func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextL
 		return nil, err
 	}
 	outbound := &Outbound{
-		Adapter:   outbound.NewAdapterWithDialerOptions(C.TypeSOCKS, tag, options.Network.Build(), options.DialerOptions),
+		Adapter:   outbound.NewAdapterWithDialerOptions(C.TypeSOCKS, tag, options.Network.Build(option.DefaultIPNetworks), options.DialerOptions),
 		dnsRouter: service.FromContext[adapter.DNSRouter](ctx),
 		logger:    logger,
 		client:    socks.NewClient(outboundDialer, options.ServerOptions.Build(), version, options.Username, options.Password),

protocol/tailscale/endpoint.go

@@ -18,6 +18,7 @@ import (
 	"github.com/sagernet/gvisor/pkg/tcpip/adapters/gonet"
 	"github.com/sagernet/gvisor/pkg/tcpip/header"
 	"github.com/sagernet/gvisor/pkg/tcpip/stack"
+	"github.com/sagernet/gvisor/pkg/tcpip/transport/icmp"
 	"github.com/sagernet/gvisor/pkg/tcpip/transport/tcp"
 	"github.com/sagernet/gvisor/pkg/tcpip/transport/udp"
 	"github.com/sagernet/sing-box/adapter"
@@ -205,8 +206,10 @@ func (t *Endpoint) Start(stage adapter.StartStage) error {
 
 	ipStack := t.server.ExportNetstack().ExportIPStack()
 	ipStack.SetTransportProtocolHandler(tcp.ProtocolNumber, tun.NewTCPForwarder(t.ctx, ipStack, t).HandlePacket)
-	udpForwarder := tun.NewUDPForwarder(t.ctx, ipStack, t, t.udpTimeout)
+	ipStack.SetTransportProtocolHandler(udp.ProtocolNumber, tun.NewUDPForwarder(t.ctx, ipStack, t, t.udpTimeout).HandlePacket)
-	ipStack.SetTransportProtocolHandler(udp.ProtocolNumber, udpForwarder.HandlePacket)
+	icmpForwarder := tun.NewICMPForwarder(t.ctx, ipStack, t, t.udpTimeout)
+	ipStack.SetTransportProtocolHandler(icmp.ProtocolNumber4, icmpForwarder.HandlePacket)
+	ipStack.SetTransportProtocolHandler(icmp.ProtocolNumber6, icmpForwarder.HandlePacket)
 	t.stack = ipStack
 
 	localBackend := t.server.ExportLocalBackend()
@@ -377,7 +380,7 @@ func (t *Endpoint) ListenPacket(ctx context.Context, destination M.Socksaddr) (n
 	return udpConn, nil
 }
 
-func (t *Endpoint) PrepareConnection(network string, source M.Socksaddr, destination M.Socksaddr) error {
+func (t *Endpoint) PrepareConnection(network string, source M.Socksaddr, destination M.Socksaddr, routeContext tun.DirectRouteContext) (tun.DirectRouteDestination, error) {
 	tsFilter := t.filter.Load()
 	if tsFilter != nil {
 		var ipProto ipproto.Proto
@@ -390,9 +393,9 @@ func (t *Endpoint) PrepareConnection(network string, source M.Socksaddr, destina
 		response := tsFilter.Check(source.Addr, destination.Addr, destination.Port, ipProto)
 		switch response {
 		case filter.Drop:
-			return syscall.ECONNRESET
+			return nil, syscall.ECONNREFUSED
 		case filter.DropSilently:
-			return tun.ErrDrop
+			return nil, tun.ErrDrop
 		}
 	}
 	return t.router.PreMatch(adapter.InboundContext{
@@ -401,7 +404,7 @@ func (t *Endpoint) PrepareConnection(network string, source M.Socksaddr, destina
 		Network:     network,
 		Source:      source,
 		Destination: destination,
-	})
+	}, routeContext)
 }
 
 func (t *Endpoint) NewConnectionEx(ctx context.Context, conn net.Conn, source M.Socksaddr, destination M.Socksaddr, onClose N.CloseHandlerFunc) {

protocol/trojan/outbound.go

@@ -43,7 +43,7 @@ func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextL
 		return nil, err
 	}
 	outbound := &Outbound{
-		Adapter:    outbound.NewAdapterWithDialerOptions(C.TypeTrojan, tag, options.Network.Build(), options.DialerOptions),
+		Adapter:    outbound.NewAdapterWithDialerOptions(C.TypeTrojan, tag, options.Network.Build(option.DefaultIPNetworks), options.DialerOptions),
 		logger:     logger,
 		dialer:     outboundDialer,
 		serverAddr: options.ServerOptions.Build(),

protocol/tuic/outbound.go

@@ -80,7 +80,7 @@ func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextL
 		return nil, err
 	}
 	return &Outbound{
-		Adapter:   outbound.NewAdapterWithDialerOptions(C.TypeTUIC, tag, options.Network.Build(), options.DialerOptions),
+		Adapter:   outbound.NewAdapterWithDialerOptions(C.TypeTUIC, tag, options.Network.Build(option.DefaultIPNetworks), options.DialerOptions),
 		logger:    logger,
 		client:    client,
 		udpStream: options.UDPOverStream,

protocol/tun/inbound.go

@@ -8,6 +8,7 @@ import (
 	"runtime"
 	"strconv"
 	"strings"
+	"syscall"
 	"time"
 
 	"github.com/sagernet/sing-box/adapter"
@@ -438,15 +439,21 @@ func (t *Inbound) Close() error {
 	)
 }
 
-func (t *Inbound) PrepareConnection(network string, source M.Socksaddr, destination M.Socksaddr) error {
+func (t *Inbound) PrepareConnection(network string, source M.Socksaddr, destination M.Socksaddr, routeContext tun.DirectRouteContext) (tun.DirectRouteDestination, error) {
-	return t.router.PreMatch(adapter.InboundContext{
+	routeDestination, err := t.router.PreMatch(adapter.InboundContext{
 		Inbound:        t.tag,
 		InboundType:    C.TypeTun,
 		Network:        network,
 		Source:         source,
 		Destination:    destination,
 		InboundOptions: t.inboundOptions,
-	})
+	}, routeContext)
+	if err != nil {
+		if !E.IsMulti(err, tun.ErrDrop, syscall.ECONNREFUSED) {
+			t.logger.Warn(err)
+		}
+	}
+	return routeDestination, err
 }
 
 func (t *Inbound) NewConnectionEx(ctx context.Context, conn net.Conn, source M.Socksaddr, destination M.Socksaddr, onClose N.CloseHandlerFunc) {

protocol/vless/outbound.go

@@ -46,7 +46,7 @@ func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextL
 		return nil, err
 	}
 	outbound := &Outbound{
-		Adapter:    outbound.NewAdapterWithDialerOptions(C.TypeVLESS, tag, options.Network.Build(), options.DialerOptions),
+		Adapter:    outbound.NewAdapterWithDialerOptions(C.TypeVLESS, tag, options.Network.Build(option.DefaultIPNetworks), options.DialerOptions),
 		logger:     logger,
 		dialer:     outboundDialer,
 		serverAddr: options.ServerOptions.Build(),

protocol/vmess/outbound.go

@@ -46,7 +46,7 @@ func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextL
 		return nil, err
 	}
 	outbound := &Outbound{
-		Adapter:    outbound.NewAdapterWithDialerOptions(C.TypeVMess, tag, options.Network.Build(), options.DialerOptions),
+		Adapter:    outbound.NewAdapterWithDialerOptions(C.TypeVMess, tag, options.Network.Build(option.DefaultIPNetworks), options.DialerOptions),
 		logger:     logger,
 		dialer:     outboundDialer,
 		serverAddr: options.ServerOptions.Build(),

protocol/wireguard/endpoint.go

@@ -13,6 +13,7 @@ import (
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
 	"github.com/sagernet/sing-box/transport/wireguard"
+	"github.com/sagernet/sing-tun"
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/bufio"
 	E "github.com/sagernet/sing/common/exceptions"
@@ -43,7 +44,7 @@ type Endpoint struct {
 
 func NewEndpoint(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.WireGuardEndpointOptions) (adapter.Endpoint, error) {
 	ep := &Endpoint{
-		Adapter:        endpoint.NewAdapterWithDialerOptions(C.TypeWireGuard, tag, []string{N.NetworkTCP, N.NetworkUDP}, options.DialerOptions),
+		Adapter:        endpoint.NewAdapterWithDialerOptions(C.TypeWireGuard, tag, []string{N.NetworkTCP, N.NetworkUDP, N.NetworkICMPv4, N.NetworkICMPv6}, options.DialerOptions),
 		ctx:            ctx,
 		router:         router,
 		dnsRouter:      service.FromContext[adapter.DNSRouter](ctx),
@@ -132,14 +133,14 @@ func (w *Endpoint) InterfaceUpdated() {
 	return
 }
 
-func (w *Endpoint) PrepareConnection(network string, source M.Socksaddr, destination M.Socksaddr) error {
+func (w *Endpoint) PrepareConnection(network string, source M.Socksaddr, destination M.Socksaddr, context tun.DirectRouteContext) (tun.DirectRouteDestination, error) {
 	return w.router.PreMatch(adapter.InboundContext{
 		Inbound:     w.Tag(),
 		InboundType: w.Type(),
 		Network:     network,
 		Source:      source,
 		Destination: destination,
-	})
+	}, context)
 }
 
 func (w *Endpoint) NewConnectionEx(ctx context.Context, conn net.Conn, source M.Socksaddr, destination M.Socksaddr, onClose N.CloseHandlerFunc) {
@@ -220,3 +221,12 @@ func (w *Endpoint) ListenPacket(ctx context.Context, destination M.Socksaddr) (n
 	}
 	return w.endpoint.ListenPacket(ctx, destination)
 }
+
+func (w *Endpoint) NewDirectRouteConnection(metadata adapter.InboundContext, routeContext tun.DirectRouteContext) (tun.DirectRouteDestination, error) {
+	destination, err := w.endpoint.NewDirectRouteConnection(metadata, routeContext)
+	if err != nil {
+		return nil, err
+	}
+	w.logger.Info("linked ", metadata.Network, " connection to ", metadata.Destination.AddrString())
+	return destination, nil
+}

protocol/wireguard/outbound.go

@@ -45,7 +45,7 @@ func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextL
 		deprecated.Report(ctx, deprecated.OptionWireGuardGSO)
 	}
 	outbound := &Outbound{
-		Adapter:        outbound.NewAdapterWithDialerOptions(C.TypeWireGuard, tag, []string{N.NetworkTCP, N.NetworkUDP}, options.DialerOptions),
+		Adapter:        outbound.NewAdapterWithDialerOptions(C.TypeWireGuard, tag, option.DefaultNetworks, options.DialerOptions),
 		ctx:            ctx,
 		dnsRouter:      service.FromContext[adapter.DNSRouter](ctx),
 		logger:         logger,

route/route.go

@@ -18,6 +18,7 @@ import (
 	"github.com/sagernet/sing-box/option"
 	"github.com/sagernet/sing-box/route/rule"
 	"github.com/sagernet/sing-mux"
+	"github.com/sagernet/sing-tun"
 	"github.com/sagernet/sing-vmess"
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/buf"
@@ -271,19 +272,36 @@ func (r *Router) routePacketConnection(ctx context.Context, conn N.PacketConn, m
 	return nil
 }
 
-func (r *Router) PreMatch(metadata adapter.InboundContext) error {
+func (r *Router) PreMatch(metadata adapter.InboundContext, routeContext tun.DirectRouteContext) (tun.DirectRouteDestination, error) {
 	selectedRule, _, _, _, err := r.matchRule(r.ctx, &metadata, true, nil, nil)
 	if err != nil {
-		return err
+		return nil, err
 	}
 	if selectedRule == nil {
-		return nil
+		defaultOutbound := r.outbound.Default()
+		if !common.Contains(defaultOutbound.Network(), metadata.Network) {
+			return nil, E.New(metadata.Network, " is not supported by default outbound: ", defaultOutbound.Tag())
+		}
+		return defaultOutbound.(adapter.DirectRouteOutbound).NewDirectRouteConnection(metadata, routeContext)
 	}
-	rejectAction, isReject := selectedRule.Action().(*rule.RuleActionReject)
+	switch action := selectedRule.Action().(type) {
-	if !isReject {
+	case *rule.RuleActionReject:
-		return nil
+		return nil, action.Error(context.Background())
+	case *rule.RuleActionRoute:
+		if routeContext == nil {
+			return nil, nil
+		}
+		outbound, loaded := r.outbound.Outbound(action.Outbound)
+		if !loaded {
+			return nil, E.New("outbound not found: ", action.Outbound)
+		}
+		if !common.Contains(outbound.Network(), metadata.Network) {
+			return nil, E.New(metadata.Network, " is not supported by outbound: ", action.Outbound)
+		}
+		return outbound.(adapter.DirectRouteOutbound).NewDirectRouteConnection(metadata, routeContext)
+	default:
+		return nil, nil
 	}
-	return rejectAction.Error(context.Background())
 }
 
 func (r *Router) matchRule(

transport/v2raygrpc/client.go

@@ -62,6 +62,7 @@ func NewClient(ctx context.Context, dialer N.Dialer, serverAddr M.Socksaddr, opt
 	dialOptions = append(dialOptions, grpc.WithContextDialer(func(ctx context.Context, server string) (net.Conn, error) {
 		return dialer.DialContext(ctx, N.NetworkTCP, M.ParseSocksaddr(server))
 	}))
+	//nolint:staticcheck
 	dialOptions = append(dialOptions, grpc.WithReturnConnectionError())
 	return &Client{
 		ctx:         ctx,
@@ -84,7 +85,6 @@ func (c *Client) connect() (*grpc.ClientConn, error) {
 		return conn, nil
 	}
 	//nolint:staticcheck
-	//goland:noinspection GoDeprecation
 	conn, err := grpc.DialContext(c.ctx, c.serverAddr, c.dialOptions...)
 	if err != nil {
 		return nil, err

transport/v2raygrpc/conn.go

@@ -18,6 +18,7 @@ type GRPCConn struct {
 }
 
 func NewGRPCConn(service GunService) *GRPCConn {
+	//nolint:staticcheck
 	if client, isClient := service.(GunService_TunClient); isClient {
 		service = &clientConnWrapper{client}
 	}

transport/wireguard/device.go

@@ -5,6 +5,7 @@ import (
 	"net/netip"
 	"time"
 
+	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-tun"
 	"github.com/sagernet/sing/common/logger"
 	N "github.com/sagernet/sing/common/network"
@@ -17,6 +18,8 @@ type Device interface {
 	N.Dialer
 	Start() error
 	SetDevice(device *device.Device)
+	Inet4Address() netip.Addr
+	Inet6Address() netip.Addr
 }
 
 type DeviceOptions struct {
@@ -41,3 +44,8 @@ func NewDevice(options DeviceOptions) (Device, error) {
 		return newSystemStackDevice(options)
 	}
 }
+
+type NatDevice interface {
+	Device
+	CreateDestination(metadata adapter.InboundContext, routeContext tun.DirectRouteContext) (tun.DirectRouteDestination, error)
+}

transport/wireguard/device_nat.go

@@ -0,0 +1,85 @@
+package wireguard
+
+import (
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-tun"
+	"github.com/sagernet/sing/common/buf"
+)
+
+var _ Device = (*natDeviceWrapper)(nil)
+
+type natDeviceWrapper struct {
+	Device
+	gVisorOutbound
+	packetOutbound chan *buf.Buffer
+	mapping        *tun.NatMapping
+	writer         *tun.NatWriter
+	buffer         [][]byte
+}
+
+func NewNATDevice(upstream Device, ipRewrite bool) NatDevice {
+	wrapper := &natDeviceWrapper{
+		Device:         upstream,
+		gVisorOutbound: newGVisorOutbound(),
+		packetOutbound: make(chan *buf.Buffer, 256),
+		mapping:        tun.NewNatMapping(ipRewrite),
+	}
+	if ipRewrite {
+		wrapper.writer = tun.NewNatWriter(upstream.Inet4Address(), upstream.Inet6Address())
+	}
+	return wrapper
+}
+
+func (d *natDeviceWrapper) Write(bufs [][]byte, offset int) (int, error) {
+	for _, buffer := range bufs {
+		handled, err := d.mapping.WritePacket(buffer[offset:])
+		if handled {
+			if err != nil {
+				return 0, err
+			}
+		} else {
+			d.buffer = append(d.buffer, buffer)
+		}
+	}
+	if len(d.buffer) > 0 {
+		_, err := d.Device.Write(d.buffer, offset)
+		if err != nil {
+			return 0, err
+		}
+		d.buffer = d.buffer[:0]
+	}
+	return 0, nil
+}
+
+func (d *natDeviceWrapper) CreateDestination(metadata adapter.InboundContext, routeContext tun.DirectRouteContext) (tun.DirectRouteDestination, error) {
+	session := tun.DirectRouteSession{
+		Source:      metadata.Source.Addr,
+		Destination: metadata.Destination.Addr,
+	}
+	d.mapping.CreateSession(session, routeContext)
+	return &natDestinationWrapper{d, session}, nil
+}
+
+var _ tun.DirectRouteDestination = (*natDestinationWrapper)(nil)
+
+type natDestinationWrapper struct {
+	device  *natDeviceWrapper
+	session tun.DirectRouteSession
+}
+
+func (d *natDestinationWrapper) WritePacket(buffer *buf.Buffer) error {
+	if d.device.writer != nil {
+		d.device.writer.RewritePacket(buffer.Bytes())
+	}
+	d.device.packetOutbound <- buffer
+	return nil
+}
+
+func (d *natDestinationWrapper) Close() error {
+	d.device.mapping.DeleteSession(d.session)
+	return nil
+}
+
+func (d *natDestinationWrapper) Timeout() bool {
+	return false
+}

transport/wireguard/device_nat_gvisor.go

@@ -0,0 +1,48 @@
+//go:build with_gvisor
+
+package wireguard
+
+import (
+	"github.com/sagernet/gvisor/pkg/tcpip/stack"
+)
+
+type gVisorOutbound struct {
+	outbound chan *stack.PacketBuffer
+}
+
+func newGVisorOutbound() gVisorOutbound {
+	return gVisorOutbound{
+		outbound: make(chan *stack.PacketBuffer, 256),
+	}
+}
+
+func (d *natDeviceWrapper) Read(bufs [][]byte, sizes []int, offset int) (n int, err error) {
+	select {
+	case packet := <-d.outbound:
+		defer packet.DecRef()
+		var copyN int
+		/*rangeIterate(packet.Data().AsRange(), func(view *buffer.View) {
+			copyN += copy(bufs[0][offset+copyN:], view.AsSlice())
+		})*/
+		for _, view := range packet.AsSlices() {
+			copyN += copy(bufs[0][offset+copyN:], view)
+		}
+		sizes[0] = copyN
+		return 1, nil
+	case packet := <-d.packetOutbound:
+		defer packet.Release()
+		sizes[0] = copy(bufs[0][offset:], packet.Bytes())
+		return 1, nil
+	default:
+	}
+	return d.Device.Read(bufs, sizes, offset)
+}
+
+func (d *natDestinationWrapper) WritePacketBuffer(packetBuffer *stack.PacketBuffer) error {
+	println("read from wg")
+	if d.device.writer != nil {
+		d.device.writer.RewritePacketBuffer(packetBuffer)
+	}
+	d.device.outbound <- packetBuffer
+	return nil
+}

transport/wireguard/device_nat_non_gvisor.go

@@ -0,0 +1,20 @@
+//go:build !with_gvisor
+
+package wireguard
+
+type gVisorOutbound struct{}
+
+func newGVisorOutbound() gVisorOutbound {
+	return gVisorOutbound{}
+}
+
+func (d *natDeviceWrapper) Read(bufs [][]byte, sizes []int, offset int) (n int, err error) {
+	select {
+	case packet := <-d.packetOutbound:
+		defer packet.Release()
+		sizes[0] = copy(bufs[0][offset:], packet.Bytes())
+		return 1, nil
+	default:
+	}
+	return d.Device.Read(bufs, sizes, offset)
+}

transport/wireguard/device_stack.go

@@ -5,6 +5,7 @@ package wireguard
 import (
 	"context"
 	"net"
+	"net/netip"
 	"os"
 
 	"github.com/sagernet/gvisor/pkg/buffer"
@@ -14,9 +15,12 @@ import (
 	"github.com/sagernet/gvisor/pkg/tcpip/network/ipv4"
 	"github.com/sagernet/gvisor/pkg/tcpip/network/ipv6"
 	"github.com/sagernet/gvisor/pkg/tcpip/stack"
+	"github.com/sagernet/gvisor/pkg/tcpip/transport/icmp"
 	"github.com/sagernet/gvisor/pkg/tcpip/transport/tcp"
 	"github.com/sagernet/gvisor/pkg/tcpip/transport/udp"
+	"github.com/sagernet/sing-box/adapter"
 	"github.com/sagernet/sing-tun"
+	"github.com/sagernet/sing/common/buf"
 	E "github.com/sagernet/sing/common/exceptions"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
@@ -24,25 +28,30 @@ import (
 	wgTun "github.com/sagernet/wireguard-go/tun"
 )
 
-var _ Device = (*stackDevice)(nil)
+var _ NatDevice = (*stackDevice)(nil)
 
 type stackDevice struct {
-	stack      *stack.Stack
+	stack          *stack.Stack
-	mtu        uint32
+	mtu            uint32
-	events     chan wgTun.Event
+	events         chan wgTun.Event
-	outbound   chan *stack.PacketBuffer
+	outbound       chan *stack.PacketBuffer
-	done       chan struct{}
+	packetOutbound chan *buf.Buffer
-	dispatcher stack.NetworkDispatcher
+	done           chan struct{}
-	addr4      tcpip.Address
+	dispatcher     stack.NetworkDispatcher
-	addr6      tcpip.Address
+	addr4          tcpip.Address
+	addr6          tcpip.Address
+	mapping        *tun.NatMapping
+	writer         *tun.NatWriter
 }
 
 func newStackDevice(options DeviceOptions) (*stackDevice, error) {
 	tunDevice := &stackDevice{
-		mtu:      options.MTU,
+		mtu:            options.MTU,
-		events:   make(chan wgTun.Event, 1),
+		events:         make(chan wgTun.Event, 1),
-		outbound: make(chan *stack.PacketBuffer, 256),
+		outbound:       make(chan *stack.PacketBuffer, 256),
-		done:     make(chan struct{}),
+		packetOutbound: make(chan *buf.Buffer, 256),
+		done:           make(chan struct{}),
+		mapping:        tun.NewNatMapping(true),
 	}
 	ipStack, err := tun.NewGVisorStack((*wireEndpoint)(tunDevice))
 	if err != nil {
@@ -68,10 +77,14 @@ func newStackDevice(options DeviceOptions) (*stackDevice, error) {
 			return nil, E.New("parse local address ", protoAddr.AddressWithPrefix, ": ", gErr.String())
 		}
 	}
+	tunDevice.writer = tun.NewNatWriter(tunDevice.Inet4Address(), tunDevice.Inet6Address())
 	tunDevice.stack = ipStack
 	if options.Handler != nil {
 		ipStack.SetTransportProtocolHandler(tcp.ProtocolNumber, tun.NewTCPForwarder(options.Context, ipStack, options.Handler).HandlePacket)
 		ipStack.SetTransportProtocolHandler(udp.ProtocolNumber, tun.NewUDPForwarder(options.Context, ipStack, options.Handler, options.UDPTimeout).HandlePacket)
+		icmpForwarder := tun.NewICMPForwarder(options.Context, ipStack, options.Handler, options.UDPTimeout)
+		ipStack.SetTransportProtocolHandler(icmp.ProtocolNumber4, icmpForwarder.HandlePacket)
+		ipStack.SetTransportProtocolHandler(icmp.ProtocolNumber6, icmpForwarder.HandlePacket)
 	}
 	return tunDevice, nil
 }
@@ -130,6 +143,14 @@ func (w *stackDevice) ListenPacket(ctx context.Context, destination M.Socksaddr)
 	return udpConn, nil
 }
 
+func (w *stackDevice) Inet4Address() netip.Addr {
+	return netip.AddrFrom4(w.addr4.As4())
+}
+
+func (w *stackDevice) Inet6Address() netip.Addr {
+	return netip.AddrFrom16(w.addr6.As16())
+}
+
 func (w *stackDevice) SetDevice(device *device.Device) {
 }
 
@@ -144,20 +165,24 @@ func (w *stackDevice) File() *os.File {
 
 func (w *stackDevice) Read(bufs [][]byte, sizes []int, offset int) (count int, err error) {
 	select {
-	case packetBuffer, ok := <-w.outbound:
+	case packet, ok := <-w.outbound:
 		if !ok {
 			return 0, os.ErrClosed
 		}
-		defer packetBuffer.DecRef()
+		defer packet.DecRef()
-		p := bufs[0]
+		var copyN int
-		p = p[offset:]
+		/*rangeIterate(packet.Data().AsRange(), func(view *buffer.View) {
-		n := 0
+			copyN += copy(bufs[0][offset+copyN:], view.AsSlice())
-		for _, slice := range packetBuffer.AsSlices() {
+		})*/
-			n += copy(p[n:], slice)
+		for _, view := range packet.AsSlices() {
+			copyN += copy(bufs[0][offset+copyN:], view)
 		}
-		sizes[0] = n
+		sizes[0] = copyN
-		count = 1
+		return 1, nil
-		return
+	case packet := <-w.packetOutbound:
+		defer packet.Release()
+		sizes[0] = copy(bufs[0][offset:], packet.Bytes())
+		return 1, nil
 	case <-w.done:
 		return 0, os.ErrClosed
 	}
@@ -169,6 +194,14 @@ func (w *stackDevice) Write(bufs [][]byte, offset int) (count int, err error) {
 		if len(b) == 0 {
 			continue
 		}
+		handled, err := w.mapping.WritePacket(b)
+		if handled {
+			if err != nil {
+				return count, err
+			}
+			count++
+			continue
+		}
 		var networkProtocol tcpip.NetworkProtocolNumber
 		switch header.IPVersion(b) {
 		case header.IPv4Version:
@@ -282,3 +315,157 @@ func (ep *wireEndpoint) Close() {
 
 func (ep *wireEndpoint) SetOnCloseAction(f func()) {
 }
+
+func (w *stackDevice) CreateDestination(metadata adapter.InboundContext, routeContext tun.DirectRouteContext) (tun.DirectRouteDestination, error) {
+	/*	var wq waiter.Queue
+		ep, err := raw.NewEndpoint(w.stack, ipv4.ProtocolNumber, icmp.ProtocolNumber4, &wq)
+		if err != nil {
+			return nil, E.Cause(gonet.TranslateNetstackError(err), "create endpoint")
+		}
+		err = ep.Connect(tcpip.FullAddress{
+			NIC:  tun.DefaultNIC,
+			Port: metadata.Destination.Port,
+			Addr: tun.AddressFromAddr(metadata.Destination.Addr),
+		})
+		if err != nil {
+			ep.Close()
+			return nil, E.Cause(gonet.TranslateNetstackError(err), "ICMP connect ", metadata.Destination)
+		}
+		fmt.Println("linked ", metadata.Network, " connection to ", metadata.Destination.AddrString())
+		destination := &endpointNatDestination{
+			ep:      ep,
+			wq:      &wq,
+			context: routeContext,
+		}
+		go destination.loopRead()
+		return destination, nil*/
+	session := tun.DirectRouteSession{
+		Source:      metadata.Source.Addr,
+		Destination: metadata.Destination.Addr,
+	}
+	w.mapping.CreateSession(session, routeContext)
+	return &stackNatDestination{
+		device:  w,
+		session: session,
+	}, nil
+}
+
+type stackNatDestination struct {
+	device  *stackDevice
+	session tun.DirectRouteSession
+}
+
+func (d *stackNatDestination) WritePacket(buffer *buf.Buffer) error {
+	if d.device.writer != nil {
+		d.device.writer.RewritePacket(buffer.Bytes())
+	}
+	d.device.packetOutbound <- buffer
+	return nil
+}
+
+func (d *stackNatDestination) WritePacketBuffer(buffer *stack.PacketBuffer) error {
+	if d.device.writer != nil {
+		d.device.writer.RewritePacketBuffer(buffer)
+	}
+	d.device.outbound <- buffer
+	return nil
+}
+
+func (d *stackNatDestination) Close() error {
+	d.device.mapping.DeleteSession(d.session)
+	return nil
+}
+
+func (d *stackNatDestination) Timeout() bool {
+	return false
+}
+
+/*type endpointNatDestination struct {
+	ep           tcpip.Endpoint
+	wq           *waiter.Queue
+	networkProto tcpip.NetworkProtocolNumber
+	context      tun.DirectRouteContext
+	done         chan struct{}
+}
+
+func (d *endpointNatDestination) loopRead() {
+	for {
+		println("start read")
+		buffer, err := commonRead(d.ep, d.wq, d.done)
+		if err != nil {
+			log.Error(err)
+			return
+		}
+		println("done read")
+		ipHdr := header.IPv4(buffer.Bytes())
+		if ipHdr.TransportProtocol() != header.ICMPv4ProtocolNumber {
+			buffer.Release()
+			continue
+		}
+		icmpHdr := header.ICMPv4(ipHdr.Payload())
+		if icmpHdr.Type() != header.ICMPv4EchoReply {
+			buffer.Release()
+			continue
+		}
+		fmt.Println("read echo reply")
+		_ = d.context.WritePacket(ipHdr)
+		buffer.Release()
+	}
+}
+
+func commonRead(ep tcpip.Endpoint, wq *waiter.Queue, done chan struct{}) (*buf.Buffer, error) {
+	buffer := buf.NewPacket()
+	result, err := ep.Read(buffer, tcpip.ReadOptions{})
+	if err != nil {
+		if _, ok := err.(*tcpip.ErrWouldBlock); ok {
+			waitEntry, notifyCh := waiter.NewChannelEntry(waiter.ReadableEvents)
+			wq.EventRegister(&waitEntry)
+			defer wq.EventUnregister(&waitEntry)
+			for {
+				result, err = ep.Read(buffer, tcpip.ReadOptions{})
+				if _, ok := err.(*tcpip.ErrWouldBlock); !ok {
+					break
+				}
+				select {
+				case <-notifyCh:
+				case <-done:
+					buffer.Release()
+					return nil, context.DeadlineExceeded
+				}
+			}
+		}
+		return nil, gonet.TranslateNetstackError(err)
+	}
+	buffer.Truncate(result.Count)
+	return buffer, nil
+}
+
+func (d *endpointNatDestination) WritePacket(buffer *buf.Buffer) error {
+	_, err := d.ep.Write(buffer, tcpip.WriteOptions{})
+	if err != nil {
+		return gonet.TranslateNetstackError(err)
+	}
+	return nil
+}
+
+func (d *endpointNatDestination) WritePacketBuffer(buffer *stack.PacketBuffer) error {
+	data := buffer.ToView().AsSlice()
+	println("write echo request buffer :" + fmt.Sprint(data))
+	_, err := d.ep.Write(bytes.NewReader(data), tcpip.WriteOptions{})
+	if err != nil {
+		log.Error(err)
+		return gonet.TranslateNetstackError(err)
+	}
+	return nil
+}
+
+func (d *endpointNatDestination) Close() error {
+	d.ep.Abort()
+	close(d.done)
+	return nil
+}
+
+func (d *endpointNatDestination) Timeout() bool {
+	return false
+}
+*/

transport/wireguard/device_system.go

@@ -28,16 +28,36 @@ type systemDevice struct {
 	batchDevice tun.LinuxTUN
 	events      chan wgTun.Event
 	closeOnce   sync.Once
+	addr4       netip.Addr
+	addr6       netip.Addr
 }
 
 func newSystemDevice(options DeviceOptions) (*systemDevice, error) {
 	if options.Name == "" {
 		options.Name = tun.CalculateInterfaceName("wg")
 	}
+	var inet4Address netip.Addr
+	var inet6Address netip.Addr
+	if len(options.Address) > 0 {
+		if prefix := common.Find(options.Address, func(it netip.Prefix) bool {
+			return it.Addr().Is4()
+		}); prefix.IsValid() {
+			inet4Address = prefix.Addr()
+		}
+	}
+	if len(options.Address) > 0 {
+		if prefix := common.Find(options.Address, func(it netip.Prefix) bool {
+			return it.Addr().Is6()
+		}); prefix.IsValid() {
+			inet6Address = prefix.Addr()
+		}
+	}
 	return &systemDevice{
 		options: options,
 		dialer:  options.CreateDialer(options.Name),
 		events:  make(chan wgTun.Event, 1),
+		addr4:   inet4Address,
+		addr6:   inet6Address,
 	}, nil
 }
 
@@ -49,6 +69,14 @@ func (w *systemDevice) ListenPacket(ctx context.Context, destination M.Socksaddr
 	return w.dialer.ListenPacket(ctx, destination)
 }
 
+func (w *systemDevice) Inet4Address() netip.Addr {
+	return w.addr4
+}
+
+func (w *systemDevice) Inet6Address() netip.Addr {
+	return w.addr6
+}
+
 func (w *systemDevice) SetDevice(device *device.Device) {
 }
 

transport/wireguard/endpoint.go

@@ -10,6 +10,8 @@ import (
 	"os"
 	"strings"
 
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-tun"
 	"github.com/sagernet/sing/common"
 	E "github.com/sagernet/sing/common/exceptions"
 	F "github.com/sagernet/sing/common/format"
@@ -29,6 +31,7 @@ type Endpoint struct {
 	ipcConf        string
 	allowedAddress []netip.Prefix
 	tunDevice      Device
+	natDevice      NatDevice
 	device         *device.Device
 	pauseManager   pause.Manager
 	pauseCallback  *list.Element[pause.Callback]
@@ -111,12 +114,17 @@ func NewEndpoint(options EndpointOptions) (*Endpoint, error) {
 	if err != nil {
 		return nil, E.Cause(err, "create WireGuard device")
 	}
+	natDevice, isNatDevice := tunDevice.(NatDevice)
+	if !isNatDevice {
+		natDevice = NewNATDevice(tunDevice, true)
+	}
 	return &Endpoint{
 		options:        options,
 		peers:          peers,
 		ipcConf:        ipcConf,
 		allowedAddress: allowedAddresses,
 		tunDevice:      tunDevice,
+		natDevice:      natDevice,
 	}, nil
 }
 
@@ -176,7 +184,13 @@ func (e *Endpoint) Start(resolve bool) error {
 			e.options.Logger.Error(fmt.Sprintf(strings.ToLower(format), args...))
 		},
 	}
-	wgDevice := device.NewDevice(e.options.Context, e.tunDevice, bind, logger, e.options.Workers)
+	var deviceInput Device
+	if e.natDevice != nil {
+		deviceInput = e.natDevice
+	} else {
+		deviceInput = e.tunDevice
+	}
+	wgDevice := device.NewDevice(e.options.Context, deviceInput, bind, logger, e.options.Workers)
 	e.tunDevice.SetDevice(wgDevice)
 	ipcConf := e.ipcConf
 	for _, peer := range e.peers {
@@ -194,6 +208,20 @@ func (e *Endpoint) Start(resolve bool) error {
 	return nil
 }
 
+func (e *Endpoint) Close() error {
+	if e.device != nil {
+		e.device.Close()
+	}
+	if e.pauseCallback != nil {
+		e.pauseManager.UnregisterCallback(e.pauseCallback)
+	}
+	return nil
+}
+
+func (e *Endpoint) BindUpdate() error {
+	return e.device.BindUpdate()
+}
+
 func (e *Endpoint) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
 	if !destination.Addr.IsValid() {
 		return nil, E.Cause(os.ErrInvalid, "invalid non-IP destination")
@@ -208,18 +236,11 @@ func (e *Endpoint) ListenPacket(ctx context.Context, destination M.Socksaddr) (n
 	return e.tunDevice.ListenPacket(ctx, destination)
 }
 
-func (e *Endpoint) BindUpdate() error {
+func (e *Endpoint) NewDirectRouteConnection(metadata adapter.InboundContext, routeContext tun.DirectRouteContext) (tun.DirectRouteDestination, error) {
-	return e.device.BindUpdate()
+	if e.natDevice == nil {
-}
+		return nil, os.ErrInvalid
-
-func (e *Endpoint) Close() error {
-	if e.device != nil {
-		e.device.Close()
 	}
-	if e.pauseCallback != nil {
+	return e.natDevice.CreateDestination(metadata, routeContext)
-		e.pauseManager.UnregisterCallback(e.pauseCallback)
-	}
-	return nil
 }
 
 func (e *Endpoint) onPauseUpdated(event int) {