fix: wireguard server resolve when only a server in peers

adapter/outbound/direct.go

@@ -4,14 +4,19 @@ import (
 	"context"
 	"errors"
 	"net/netip"
+	"os"
+	"strconv"
 
 	N "github.com/metacubex/mihomo/common/net"
 	"github.com/metacubex/mihomo/component/dialer"
 	"github.com/metacubex/mihomo/component/loopback"
 	"github.com/metacubex/mihomo/component/resolver"
 	C "github.com/metacubex/mihomo/constant"
+	"github.com/metacubex/mihomo/constant/features"
 )
 
+var DisableLoopBackDetector, _ = strconv.ParseBool(os.Getenv("DISABLE_LOOPBACK_DETECTOR"))
+
 type Direct struct {
 	*Base
 	loopBack *loopback.Detector
@@ -24,8 +29,10 @@ type DirectOption struct {
 
 // DialContext implements C.ProxyAdapter
 func (d *Direct) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.Conn, error) {
-	if err := d.loopBack.CheckConn(metadata); err != nil {
-		return nil, err
+	if !features.CMFA && !DisableLoopBackDetector {
+		if err := d.loopBack.CheckConn(metadata); err != nil {
+			return nil, err
+		}
 	}
 	opts = append(opts, dialer.WithResolver(resolver.DefaultResolver))
 	c, err := dialer.DialContext(ctx, "tcp", metadata.RemoteAddress(), d.Base.DialOptions(opts...)...)
@@ -38,8 +45,10 @@ func (d *Direct) DialContext(ctx context.Context, metadata *C.Metadata, opts ...
 
 // ListenPacketContext implements C.ProxyAdapter
 func (d *Direct) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (C.PacketConn, error) {
-	if err := d.loopBack.CheckPacketConn(metadata); err != nil {
-		return nil, err
+	if !features.CMFA && !DisableLoopBackDetector {
+		if err := d.loopBack.CheckPacketConn(metadata); err != nil {
+			return nil, err
+		}
 	}
 	// net.UDPConn.WriteTo only working with *net.UDPAddr, so we need a net.UDPAddr
 	if !metadata.Resolved() {

adapter/outbound/wireguard.go

@@ -304,13 +304,16 @@ func (w *WireGuard) init(ctx context.Context) error {
 	ipcConf := "private_key=" + w.option.PrivateKey
 	if len(w.option.Peers) > 0 {
 		for i, peer := range w.option.Peers {
+			ipcConf += "\npublic_key=" + peer.PublicKey
 			destination, err := w.resolve(ctx, peer.Addr())
 			if err != nil {
 				// !!! do not set initErr here !!!
 				// let us can retry domain resolve in next time
 				return E.Cause(err, "resolve endpoint domain for peer ", i)
 			}
-			ipcConf += "\npublic_key=" + peer.PublicKey
+			if len(w.option.Peers) == 1 { // must call SetConnectAddr if isConnect == true
+				w.bind.SetConnectAddr(destination)
+			}
 			ipcConf += "\nendpoint=" + destination.String()
 			if peer.PreSharedKey != "" {
 				ipcConf += "\npreshared_key=" + peer.PreSharedKey
@@ -332,7 +335,7 @@ func (w *WireGuard) init(ctx context.Context) error {
 			// let us can retry domain resolve in next time
 			return E.Cause(err, "resolve endpoint domain")
 		}
-		w.bind.SetConnectAddr(destination)
+		w.bind.SetConnectAddr(destination) // must call SetConnectAddr if isConnect == true
 		ipcConf += "\nendpoint=" + destination.String()
 		if w.option.PreSharedKey != "" {
 			ipcConf += "\npreshared_key=" + w.option.PreSharedKey

go.mod

@@ -19,7 +19,7 @@ require (
 	github.com/lunixbochs/struc v0.0.0-20200707160740-784aaebc1d40
 	github.com/mdlayher/netlink v1.7.2
 	github.com/metacubex/gopacket v1.1.20-0.20230608035415-7e2f98a3e759
-	github.com/metacubex/quic-go v0.45.1-0.20240607133845-b24f02b35a22
+	github.com/metacubex/quic-go v0.45.1-0.20240610004319-163fee60637e
 	github.com/metacubex/randv2 v0.2.0
 	github.com/metacubex/sing-quic v0.0.0-20240518034124-7696d3f7da72
 	github.com/metacubex/sing-shadowsocks v0.2.6

go.sum

@@ -104,8 +104,8 @@ github.com/metacubex/gopacket v1.1.20-0.20230608035415-7e2f98a3e759 h1:cjd4biTvO
 github.com/metacubex/gopacket v1.1.20-0.20230608035415-7e2f98a3e759/go.mod h1:UHOv2xu+RIgLwpXca7TLrXleEd4oR3sPatW6IF8wU88=
 github.com/metacubex/gvisor v0.0.0-20240320004321-933faba989ec h1:HxreOiFTUrJXJautEo8rnE1uKTVGY8wtZepY1Tii/Nc=
 github.com/metacubex/gvisor v0.0.0-20240320004321-933faba989ec/go.mod h1:8BVmQ+3cxjqzWElafm24rb2Ae4jRI6vAXNXWqWjfrXw=
-github.com/metacubex/quic-go v0.45.1-0.20240607133845-b24f02b35a22 h1:dKYoWnrB5bbCMoMQit4INUDKiDcjc0Azsm3GltYf9Pw=
-github.com/metacubex/quic-go v0.45.1-0.20240607133845-b24f02b35a22/go.mod h1:Yza2H7Ax1rxWPUcJx0vW+oAt9EsPuSiyQFhFabUPzwU=
+github.com/metacubex/quic-go v0.45.1-0.20240610004319-163fee60637e h1:bLYn3GuRvWDcBDAkIv5kUYIhzHwafDVq635BuybnKqI=
+github.com/metacubex/quic-go v0.45.1-0.20240610004319-163fee60637e/go.mod h1:Yza2H7Ax1rxWPUcJx0vW+oAt9EsPuSiyQFhFabUPzwU=
 github.com/metacubex/randv2 v0.2.0 h1:uP38uBvV2SxYfLj53kuvAjbND4RUDfFJjwr4UigMiLs=
 github.com/metacubex/randv2 v0.2.0/go.mod h1:kFi2SzrQ5WuneuoLLCMkABtiBu6VRrMrWFqSPyj2cxY=
 github.com/metacubex/sing v0.0.0-20240518125217-e63d65a914d1 h1:7hDHLTmjgtRoAp59STwPQpe5Pinwi4cWex+FB3Ohvco=