Fix connect domain for IP outbound

outbound/default.go

@@ -11,6 +11,7 @@ import (
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing-dns"
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/buf"
 	"github.com/sagernet/sing/common/bufio"
@@ -74,7 +75,7 @@ func NewConnection(ctx context.Context, this N.Dialer, conn net.Conn, metadata a
 	return CopyEarlyConn(ctx, conn, outConn)
 }
 
-func NewDirectConnection(ctx context.Context, router adapter.Router, this N.Dialer, conn net.Conn, metadata adapter.InboundContext) error {
+func NewDirectConnection(ctx context.Context, router adapter.Router, this N.Dialer, conn net.Conn, metadata adapter.InboundContext, domainStrategy dns.DomainStrategy) error {
 	ctx = adapter.WithContext(ctx, &metadata)
 	var outConn net.Conn
 	var err error
@@ -82,7 +83,7 @@ func NewDirectConnection(ctx context.Context, router adapter.Router, this N.Dial
 		outConn, err = N.DialSerial(ctx, this, N.NetworkTCP, metadata.Destination, metadata.DestinationAddresses)
 	} else if metadata.Destination.IsFqdn() {
 		var destinationAddresses []netip.Addr
-		destinationAddresses, err = router.LookupDefault(ctx, metadata.Destination.Fqdn)
+		destinationAddresses, err = router.Lookup(ctx, metadata.Destination.Fqdn, domainStrategy)
 		if err != nil {
 			return N.ReportHandshakeFailure(conn, err)
 		}
@@ -133,7 +134,7 @@ func NewPacketConnection(ctx context.Context, this N.Dialer, conn N.PacketConn,
 	return bufio.CopyPacketConn(ctx, conn, bufio.NewPacketConn(outConn))
 }
 
-func NewDirectPacketConnection(ctx context.Context, router adapter.Router, this N.Dialer, conn N.PacketConn, metadata adapter.InboundContext) error {
+func NewDirectPacketConnection(ctx context.Context, router adapter.Router, this N.Dialer, conn N.PacketConn, metadata adapter.InboundContext, domainStrategy dns.DomainStrategy) error {
 	ctx = adapter.WithContext(ctx, &metadata)
 	var outConn net.PacketConn
 	var destinationAddress netip.Addr
@@ -142,7 +143,7 @@ func NewDirectPacketConnection(ctx context.Context, router adapter.Router, this
 		outConn, destinationAddress, err = N.ListenSerial(ctx, this, metadata.Destination, metadata.DestinationAddresses)
 	} else if metadata.Destination.IsFqdn() {
 		var destinationAddresses []netip.Addr
-		destinationAddresses, err = router.LookupDefault(ctx, metadata.Destination.Fqdn)
+		destinationAddresses, err = router.Lookup(ctx, metadata.Destination.Fqdn, domainStrategy)
 		if err != nil {
 			return N.ReportHandshakeFailure(conn, err)
 		}

outbound/socks.go

@@ -9,6 +9,7 @@ import (
 	C "github.com/sagernet/sing-box/constant"
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
+	"github.com/sagernet/sing-dns"
 	"github.com/sagernet/sing/common"
 	E "github.com/sagernet/sing/common/exceptions"
 	M "github.com/sagernet/sing/common/metadata"
@@ -114,7 +115,7 @@ func (h *Socks) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.
 
 func (h *Socks) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
 	if h.resolve {
-		return NewDirectConnection(ctx, h.router, h, conn, metadata)
+		return NewDirectConnection(ctx, h.router, h, conn, metadata, dns.DomainStrategyUseIPv4)
 	} else {
 		return NewConnection(ctx, h, conn, metadata)
 	}
@@ -122,7 +123,7 @@ func (h *Socks) NewConnection(ctx context.Context, conn net.Conn, metadata adapt
 
 func (h *Socks) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
 	if h.resolve {
-		return NewDirectPacketConnection(ctx, h.router, h, conn, metadata)
+		return NewDirectPacketConnection(ctx, h.router, h, conn, metadata, dns.DomainStrategyUseIPv4)
 	} else {
 		return NewPacketConnection(ctx, h, conn, metadata)
 	}

outbound/wireguard.go

@@ -16,6 +16,7 @@ import (
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
 	"github.com/sagernet/sing-box/transport/wireguard"
+	"github.com/sagernet/sing-dns"
 	"github.com/sagernet/sing-tun"
 	"github.com/sagernet/sing/common"
 	"github.com/sagernet/sing/common/debug"
@@ -228,11 +229,11 @@ func (w *WireGuard) ListenPacket(ctx context.Context, destination M.Socksaddr) (
 }
 
 func (w *WireGuard) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
-	return NewDirectConnection(ctx, w.router, w, conn, metadata)
+	return NewDirectConnection(ctx, w.router, w, conn, metadata, dns.DomainStrategyAsIS)
 }
 
 func (w *WireGuard) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
-	return NewDirectPacketConnection(ctx, w.router, w, conn, metadata)
+	return NewDirectPacketConnection(ctx, w.router, w, conn, metadata, dns.DomainStrategyAsIS)
 }
 
 func (w *WireGuard) Start() error {