Update dependencies

common/singbridge/destination.go

@@ -0,0 +1,46 @@
+package singbridge
+
+import (
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/xtls/xray-core/common/net"
+)
+
+func ToNetwork(network string) net.Network {
+	switch N.NetworkName(network) {
+	case N.NetworkTCP:
+		return net.Network_TCP
+	case N.NetworkUDP:
+		return net.Network_UDP
+	default:
+		return net.Network_Unknown
+	}
+}
+
+func ToDestination(socksaddr M.Socksaddr, network net.Network) net.Destination {
+	if socksaddr.IsFqdn() {
+		return net.Destination{
+			Network: network,
+			Address: net.DomainAddress(socksaddr.Fqdn),
+			Port:    net.Port(socksaddr.Port),
+		}
+	} else {
+		return net.Destination{
+			Network: network,
+			Address: net.IPAddress(socksaddr.Addr.AsSlice()),
+			Port:    net.Port(socksaddr.Port),
+		}
+	}
+}
+
+func ToSocksaddr(destination net.Destination) M.Socksaddr {
+	var addr M.Socksaddr
+	switch destination.Address.Family() {
+	case net.AddressFamilyDomain:
+		addr.Fqdn = destination.Address.Domain()
+	default:
+		addr.Addr = M.AddrFromIP(destination.Address.IP())
+	}
+	addr.Port = uint16(destination.Port)
+	return addr
+}

common/singbridge/dialer.go

@@ -0,0 +1,59 @@
+package singbridge
+
+import (
+	"context"
+	"os"
+
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/net/cnc"
+	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/proxy"
+	"github.com/xtls/xray-core/transport"
+	"github.com/xtls/xray-core/transport/internet"
+	"github.com/xtls/xray-core/transport/pipe"
+)
+
+var _ N.Dialer = (*XrayDialer)(nil)
+
+type XrayDialer struct {
+	internet.Dialer
+}
+
+func NewDialer(dialer internet.Dialer) *XrayDialer {
+	return &XrayDialer{dialer}
+}
+
+func (d *XrayDialer) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
+	return d.Dialer.Dial(ctx, ToDestination(destination, ToNetwork(network)))
+}
+
+func (d *XrayDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
+	return nil, os.ErrInvalid
+}
+
+type XrayOutboundDialer struct {
+	outbound proxy.Outbound
+	dialer   internet.Dialer
+}
+
+func NewOutboundDialer(outbound proxy.Outbound, dialer internet.Dialer) *XrayOutboundDialer {
+	return &XrayOutboundDialer{outbound, dialer}
+}
+
+func (d *XrayOutboundDialer) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
+	ctx = session.ContextWithOutbound(context.Background(), &session.Outbound{
+		Target: ToDestination(destination, ToNetwork(network)),
+	})
+	opts := []pipe.Option{pipe.WithSizeLimit(64 * 1024)}
+	uplinkReader, uplinkWriter := pipe.New(opts...)
+	downlinkReader, downlinkWriter := pipe.New(opts...)
+	conn := cnc.NewConnection(cnc.ConnectionInputMulti(downlinkWriter), cnc.ConnectionOutputMulti(uplinkReader))
+	go d.outbound.Process(ctx, &transport.Link{Reader: downlinkReader, Writer: uplinkWriter}, d.dialer)
+	return conn, nil
+}
+
+func (d *XrayOutboundDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
+	return nil, os.ErrInvalid
+}

common/singbridge/error.go

@@ -0,0 +1,10 @@
+package singbridge
+
+import E "github.com/sagernet/sing/common/exceptions"
+
+func ReturnError(err error) error {
+	if E.IsClosedOrCanceled(err) {
+		return nil
+	}
+	return err
+}

common/singbridge/handler.go

@@ -0,0 +1,51 @@
+package singbridge
+
+import (
+	"context"
+	"io"
+
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/xtls/xray-core/common/buf"
+	"github.com/xtls/xray-core/common/errors"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/common/session"
+	"github.com/xtls/xray-core/features/routing"
+	"github.com/xtls/xray-core/transport"
+)
+
+var (
+	_ N.TCPConnectionHandler = (*Dispatcher)(nil)
+	_ N.UDPConnectionHandler = (*Dispatcher)(nil)
+)
+
+type Dispatcher struct {
+	upstream     routing.Dispatcher
+	newErrorFunc func(values ...any) *errors.Error
+}
+
+func NewDispatcher(dispatcher routing.Dispatcher, newErrorFunc func(values ...any) *errors.Error) *Dispatcher {
+	return &Dispatcher{
+		upstream:     dispatcher,
+		newErrorFunc: newErrorFunc,
+	}
+}
+
+func (d *Dispatcher) NewConnection(ctx context.Context, conn net.Conn, metadata M.Metadata) error {
+	xConn := NewConn(conn)
+	return d.upstream.DispatchLink(ctx, ToDestination(metadata.Destination, net.Network_TCP), &transport.Link{
+		Reader: xConn,
+		Writer: xConn,
+	})
+}
+
+func (d *Dispatcher) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata M.Metadata) error {
+	return d.upstream.DispatchLink(ctx, ToDestination(metadata.Destination, net.Network_UDP), &transport.Link{
+		Reader: buf.NewPacketReader(conn.(io.Reader)),
+		Writer: buf.NewWriter(conn.(io.Writer)),
+	})
+}
+
+func (d *Dispatcher) NewError(ctx context.Context, err error) {
+	d.newErrorFunc(err).WriteToLog(session.ExportIDToError(ctx))
+}

common/singbridge/logger.go

@@ -0,0 +1,71 @@
+package singbridge
+
+import (
+	"context"
+
+	"github.com/sagernet/sing/common/logger"
+	"github.com/xtls/xray-core/common/errors"
+	"github.com/xtls/xray-core/common/session"
+)
+
+var _ logger.ContextLogger = (*XrayLogger)(nil)
+
+type XrayLogger struct {
+	newError func(values ...any) *errors.Error
+}
+
+func NewLogger(newErrorFunc func(values ...any) *errors.Error) *XrayLogger {
+	return &XrayLogger{
+		newErrorFunc,
+	}
+}
+
+func (l *XrayLogger) Trace(args ...any) {
+}
+
+func (l *XrayLogger) Debug(args ...any) {
+	l.newError(args...).AtDebug().WriteToLog()
+}
+
+func (l *XrayLogger) Info(args ...any) {
+	l.newError(args...).AtInfo().WriteToLog()
+}
+
+func (l *XrayLogger) Warn(args ...any) {
+	l.newError(args...).AtWarning().WriteToLog()
+}
+
+func (l *XrayLogger) Error(args ...any) {
+	l.newError(args...).AtError().WriteToLog()
+}
+
+func (l *XrayLogger) Fatal(args ...any) {
+}
+
+func (l *XrayLogger) Panic(args ...any) {
+}
+
+func (l *XrayLogger) TraceContext(ctx context.Context, args ...any) {
+}
+
+func (l *XrayLogger) DebugContext(ctx context.Context, args ...any) {
+	l.newError(args...).AtDebug().WriteToLog(session.ExportIDToError(ctx))
+}
+
+func (l *XrayLogger) InfoContext(ctx context.Context, args ...any) {
+	l.newError(args...).AtInfo().WriteToLog(session.ExportIDToError(ctx))
+}
+
+func (l *XrayLogger) WarnContext(ctx context.Context, args ...any) {
+	l.newError(args...).AtWarning().WriteToLog(session.ExportIDToError(ctx))
+}
+
+func (l *XrayLogger) ErrorContext(ctx context.Context, args ...any) {
+	l.newError(args...).AtError().WriteToLog(session.ExportIDToError(ctx))
+}
+
+func (l *XrayLogger) FatalContext(ctx context.Context, args ...any) {
+}
+
+func (l *XrayLogger) PanicContext(ctx context.Context, args ...any) {
+}

common/singbridge/packet.go

@@ -0,0 +1,82 @@
+package singbridge
+
+import (
+	"context"
+
+	B "github.com/sagernet/sing/common/buf"
+	"github.com/sagernet/sing/common/bufio"
+	M "github.com/sagernet/sing/common/metadata"
+	"github.com/xtls/xray-core/common/buf"
+	"github.com/xtls/xray-core/common/net"
+	"github.com/xtls/xray-core/transport"
+)
+
+func CopyPacketConn(ctx context.Context, inboundConn net.Conn, link *transport.Link, destination net.Destination, serverConn net.PacketConn) error {
+	conn := &PacketConnWrapper{
+		Reader: link.Reader,
+		Writer: link.Writer,
+		Dest:   destination,
+		Conn:   inboundConn,
+	}
+	return ReturnError(bufio.CopyPacketConn(ctx, conn, bufio.NewPacketConn(serverConn)))
+}
+
+type PacketConnWrapper struct {
+	buf.Reader
+	buf.Writer
+	net.Conn
+	Dest   net.Destination
+	cached buf.MultiBuffer
+}
+
+func (w *PacketConnWrapper) ReadPacket(buffer *B.Buffer) (M.Socksaddr, error) {
+	if w.cached != nil {
+		mb, bb := buf.SplitFirst(w.cached)
+		if bb == nil {
+			w.cached = nil
+		} else {
+			buffer.Write(bb.Bytes())
+			w.cached = mb
+			var destination net.Destination
+			if bb.UDP != nil {
+				destination = *bb.UDP
+			} else {
+				destination = w.Dest
+			}
+			bb.Release()
+			return ToSocksaddr(destination), nil
+		}
+	}
+	mb, err := w.ReadMultiBuffer()
+	if err != nil {
+		return M.Socksaddr{}, err
+	}
+	nb, bb := buf.SplitFirst(mb)
+	if bb == nil {
+		return M.Socksaddr{}, nil
+	} else {
+		buffer.Write(bb.Bytes())
+		w.cached = nb
+		var destination net.Destination
+		if bb.UDP != nil {
+			destination = *bb.UDP
+		} else {
+			destination = w.Dest
+		}
+		bb.Release()
+		return ToSocksaddr(destination), nil
+	}
+}
+
+func (w *PacketConnWrapper) WritePacket(buffer *B.Buffer, destination M.Socksaddr) error {
+	vBuf := buf.New()
+	vBuf.Write(buffer.Bytes())
+	endpoint := ToDestination(destination, net.Network_UDP)
+	vBuf.UDP = &endpoint
+	return w.Writer.WriteMultiBuffer(buf.MultiBuffer{vBuf})
+}
+
+func (w *PacketConnWrapper) Close() error {
+	buf.ReleaseMulti(w.cached)
+	return nil
+}

common/singbridge/pipe.go

@@ -0,0 +1,61 @@
+package singbridge
+
+import (
+	"context"
+	"io"
+	"net"
+
+	"github.com/sagernet/sing/common/bufio"
+	"github.com/xtls/xray-core/common/buf"
+	"github.com/xtls/xray-core/transport"
+)
+
+func CopyConn(ctx context.Context, inboundConn net.Conn, link *transport.Link, serverConn net.Conn) error {
+	conn := &PipeConnWrapper{
+		W:    link.Writer,
+		Conn: inboundConn,
+	}
+	if ir, ok := link.Reader.(io.Reader); ok {
+		conn.R = ir
+	} else {
+		conn.R = &buf.BufferedReader{Reader: link.Reader}
+	}
+	return ReturnError(bufio.CopyConn(ctx, conn, serverConn))
+}
+
+type PipeConnWrapper struct {
+	R io.Reader
+	W buf.Writer
+	net.Conn
+}
+
+func (w *PipeConnWrapper) Close() error {
+	return nil
+}
+
+func (w *PipeConnWrapper) Read(b []byte) (n int, err error) {
+	return w.R.Read(b)
+}
+
+func (w *PipeConnWrapper) Write(p []byte) (n int, err error) {
+	n = len(p)
+	var mb buf.MultiBuffer
+	pLen := len(p)
+	for pLen > 0 {
+		buffer := buf.New()
+		if pLen > buf.Size {
+			_, err = buffer.Write(p[:buf.Size])
+			p = p[buf.Size:]
+		} else {
+			buffer.Write(p)
+		}
+		pLen -= int(buffer.Len())
+		mb = append(mb, buffer)
+	}
+	err = w.W.WriteMultiBuffer(mb)
+	if err != nil {
+		n = 0
+		buf.ReleaseMulti(mb)
+	}
+	return
+}

common/singbridge/reader.go

@@ -0,0 +1,66 @@
+package singbridge
+
+import (
+	"time"
+
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/bufio"
+	N "github.com/sagernet/sing/common/network"
+	"github.com/xtls/xray-core/common/buf"
+	"github.com/xtls/xray-core/common/net"
+)
+
+var (
+	_ buf.Reader        = (*Conn)(nil)
+	_ buf.TimeoutReader = (*Conn)(nil)
+	_ buf.Writer        = (*Conn)(nil)
+)
+
+type Conn struct {
+	net.Conn
+	writer N.VectorisedWriter
+}
+
+func NewConn(conn net.Conn) *Conn {
+	writer, _ := bufio.CreateVectorisedWriter(conn)
+	return &Conn{
+		Conn:   conn,
+		writer: writer,
+	}
+}
+
+func (c *Conn) ReadMultiBuffer() (buf.MultiBuffer, error) {
+	buffer, err := buf.ReadBuffer(c.Conn)
+	if err != nil {
+		return nil, err
+	}
+	return buf.MultiBuffer{buffer}, nil
+}
+
+func (c *Conn) ReadMultiBufferTimeout(duration time.Duration) (buf.MultiBuffer, error) {
+	err := c.SetReadDeadline(time.Now().Add(duration))
+	if err != nil {
+		return nil, err
+	}
+	defer c.SetReadDeadline(time.Time{})
+	return c.ReadMultiBuffer()
+}
+
+func (c *Conn) WriteMultiBuffer(bufferList buf.MultiBuffer) error {
+	defer buf.ReleaseMulti(bufferList)
+	if c.writer != nil {
+		bytesList := make([][]byte, len(bufferList))
+		for i, buffer := range bufferList {
+			bytesList[i] = buffer.Bytes()
+		}
+		return common.Error(bufio.WriteVectorised(c.writer, bytesList))
+	}
+	// Since this conn is only used by tun, we don't force buffer writes to merge.
+	for _, buffer := range bufferList {
+		_, err := c.Conn.Write(buffer.Bytes())
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}