Fix: CounterConnection with ReadV/WriteV (#720)

Co-authored-by: JimhHan <50871214+JimhHan@users.noreply.github.com>

app/proxyman/inbound/worker.go

@@ -6,6 +6,8 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/app/proxyman"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
@@ -54,7 +56,7 @@ func getTProxyType(s *internet.MemoryStreamConfig) internet.SocketConfig_TProxyM
 	return s.SocketSettings.Tproxy
 }
 
-func (w *tcpWorker) callback(conn internet.Connection) {
+func (w *tcpWorker) callback(conn stat.Connection) {
 	ctx, cancel := context.WithCancel(w.ctx)
 	sid := session.NewID()
 	ctx = session.ContextWithID(ctx, sid)
@@ -80,7 +82,7 @@ func (w *tcpWorker) callback(conn internet.Connection) {
 	}
 
 	if w.uplinkCounter != nil || w.downlinkCounter != nil {
-		conn = &internet.StatCouterConnection{
+		conn = &stat.CounterConnection{
 			Connection:   conn,
 			ReadCounter:  w.uplinkCounter,
 			WriteCounter: w.downlinkCounter,
@@ -117,7 +119,7 @@ func (w *tcpWorker) Proxy() proxy.Inbound {
 
 func (w *tcpWorker) Start() error {
 	ctx := context.Background()
-	hub, err := internet.ListenTCP(ctx, w.address, w.port, w.stream, func(conn internet.Connection) {
+	hub, err := internet.ListenTCP(ctx, w.address, w.port, w.stream, func(conn stat.Connection) {
 		go w.callback(conn)
 	})
 	if err != nil {
@@ -436,13 +438,13 @@ type dsWorker struct {
 	ctx context.Context
 }
 
-func (w *dsWorker) callback(conn internet.Connection) {
+func (w *dsWorker) callback(conn stat.Connection) {
 	ctx, cancel := context.WithCancel(w.ctx)
 	sid := session.NewID()
 	ctx = session.ContextWithID(ctx, sid)
 
 	if w.uplinkCounter != nil || w.downlinkCounter != nil {
-		conn = &internet.StatCouterConnection{
+		conn = &stat.CounterConnection{
 			Connection:   conn,
 			ReadCounter:  w.uplinkCounter,
 			WriteCounter: w.downlinkCounter,
@@ -482,7 +484,7 @@ func (w *dsWorker) Port() net.Port {
 }
 func (w *dsWorker) Start() error {
 	ctx := context.Background()
-	hub, err := internet.ListenUnix(ctx, w.address, w.stream, func(conn internet.Connection) {
+	hub, err := internet.ListenUnix(ctx, w.address, w.stream, func(conn stat.Connection) {
 		go w.callback(conn)
 	})
 	if err != nil {

app/proxyman/outbound/handler.go

@@ -3,6 +3,8 @@ package outbound
 import (
 	"context"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/app/proxyman"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/mux"
@@ -158,7 +160,7 @@ func (h *Handler) Address() net.Address {
 }
 
 // Dial implements internet.Dialer.
-func (h *Handler) Dial(ctx context.Context, dest net.Destination) (internet.Connection, error) {
+func (h *Handler) Dial(ctx context.Context, dest net.Destination) (stat.Connection, error) {
 	if h.senderSettings != nil {
 		if h.senderSettings.ProxySettings.HasTag() {
 			tag := h.senderSettings.ProxySettings.Tag
@@ -201,9 +203,9 @@ func (h *Handler) Dial(ctx context.Context, dest net.Destination) (internet.Conn
 	return h.getStatCouterConnection(conn), err
 }
 
-func (h *Handler) getStatCouterConnection(conn internet.Connection) internet.Connection {
+func (h *Handler) getStatCouterConnection(conn stat.Connection) stat.Connection {
 	if h.uplinkCounter != nil || h.downlinkCounter != nil {
-		return &internet.StatCouterConnection{
+		return &stat.CounterConnection{
 			Connection:   conn,
 			ReadCounter:  h.downlinkCounter,
 			WriteCounter: h.uplinkCounter,

app/proxyman/outbound/handler_test.go

@@ -4,6 +4,8 @@ import (
 	"context"
 	"testing"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/app/policy"
 	. "github.com/xtls/xray-core/app/proxyman/outbound"
 	"github.com/xtls/xray-core/app/stats"
@@ -12,7 +14,6 @@ import (
 	core "github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/outbound"
 	"github.com/xtls/xray-core/proxy/freedom"
-	"github.com/xtls/xray-core/transport/internet"
 )
 
 func TestInterfaces(t *testing.T) {
@@ -44,9 +45,9 @@ func TestOutboundWithoutStatCounter(t *testing.T) {
 		ProxySettings: serial.ToTypedMessage(&freedom.Config{}),
 	})
 	conn, _ := h.(*Handler).Dial(ctx, net.TCPDestination(net.DomainAddress("localhost"), 13146))
-	_, ok := conn.(*internet.StatCouterConnection)
+	_, ok := conn.(*stat.CounterConnection)
 	if ok {
-		t.Errorf("Expected conn to not be StatCouterConnection")
+		t.Errorf("Expected conn to not be CounterConnection")
 	}
 }
 
@@ -73,8 +74,8 @@ func TestOutboundWithStatCounter(t *testing.T) {
 		ProxySettings: serial.ToTypedMessage(&freedom.Config{}),
 	})
 	conn, _ := h.(*Handler).Dial(ctx, net.TCPDestination(net.DomainAddress("localhost"), 13146))
-	_, ok := conn.(*internet.StatCouterConnection)
+	_, ok := conn.(*stat.CounterConnection)
 	if !ok {
-		t.Errorf("Expected conn to be StatCouterConnection")
+		t.Errorf("Expected conn to be CounterConnection")
 	}
 }

common/buf/io.go

@@ -6,6 +6,9 @@ import (
 	"os"
 	"syscall"
 	"time"
+
+	"github.com/xtls/xray-core/features/stats"
+	"github.com/xtls/xray-core/transport/internet/stat"
 )
 
 // Reader extends io.Reader with MultiBuffer.
@@ -29,9 +32,17 @@ type Writer interface {
 }
 
 // WriteAllBytes ensures all bytes are written into the given writer.
-func WriteAllBytes(writer io.Writer, payload []byte) error {
+func WriteAllBytes(writer io.Writer, payload []byte, c stats.Counter) error {
+	wc := 0
+	defer func() {
+		if c != nil {
+			c.Add(int64(wc))
+		}
+	}()
+
 	for len(payload) > 0 {
 		n, err := writer.Write(payload)
+		wc += n
 		if err != nil {
 			return err
 		}
@@ -60,12 +71,18 @@ func NewReader(reader io.Reader) Reader {
 
 	_, isFile := reader.(*os.File)
 	if !isFile && useReadv {
+		var counter stats.Counter
+
+		if statConn, ok := reader.(*stat.CounterConnection); ok {
+			reader = statConn.Connection
+			counter = statConn.ReadCounter
+		}
 		if sc, ok := reader.(syscall.Conn); ok {
 			rawConn, err := sc.SyscallConn()
 			if err != nil {
 				newError("failed to get sysconn").Base(err).WriteToLog()
 			} else {
-				return NewReadVReader(reader, rawConn)
+				return NewReadVReader(reader, rawConn, counter)
 			}
 		}
 	}
@@ -104,13 +121,24 @@ func NewWriter(writer io.Writer) Writer {
 		return mw
 	}
 
-	if isPacketWriter(writer) {
+	var iConn = writer
+	if statConn, ok := writer.(*stat.CounterConnection); ok {
+		iConn = statConn.Connection
+	}
+
+	if isPacketWriter(iConn) {
 		return &SequentialWriter{
 			Writer: writer,
 		}
 	}
 
+	var counter stats.Counter
+
+	if statConn, ok := writer.(*stat.CounterConnection); ok {
+		counter = statConn.WriteCounter
+	}
 	return &BufferToBytesWriter{
-		Writer: writer,
+		Writer:  iConn,
+		counter: counter,
 	}
 }

common/buf/readv_reader.go

@@ -6,6 +6,8 @@ import (
 	"io"
 	"syscall"
 
+	"github.com/xtls/xray-core/features/stats"
+
 	"github.com/xtls/xray-core/common/platform"
 )
 
@@ -53,17 +55,19 @@ type ReadVReader struct {
 	rawConn syscall.RawConn
 	mr      multiReader
 	alloc   allocStrategy
+	counter stats.Counter
 }
 
 // NewReadVReader creates a new ReadVReader.
-func NewReadVReader(reader io.Reader, rawConn syscall.RawConn) *ReadVReader {
+func NewReadVReader(reader io.Reader, rawConn syscall.RawConn, counter stats.Counter) *ReadVReader {
 	return &ReadVReader{
 		Reader:  reader,
 		rawConn: rawConn,
 		alloc: allocStrategy{
 			current: 1,
 		},
-		mr: newMultiReader(),
+		mr:      newMultiReader(),
+		counter: counter,
 	}
 }
 
@@ -122,10 +126,16 @@ func (r *ReadVReader) ReadMultiBuffer() (MultiBuffer, error) {
 		if b.IsFull() {
 			r.alloc.Adjust(1)
 		}
+		if r.counter != nil && b != nil {
+			r.counter.Add(int64(b.Len()))
+		}
 		return MultiBuffer{b}, err
 	}
 
 	mb, err := r.readMulti()
+	if r.counter != nil && mb != nil {
+		r.counter.Add(int64(mb.Len()))
+	}
 	if err != nil {
 		return nil, err
 	}

common/buf/readv_test.go

@@ -50,7 +50,7 @@ func TestReadvReader(t *testing.T) {
 	rawConn, err := conn.(*net.TCPConn).SyscallConn()
 	common.Must(err)
 
-	reader := NewReadVReader(conn, rawConn)
+	reader := NewReadVReader(conn, rawConn, nil)
 	var rmb MultiBuffer
 	for {
 		mb, err := reader.ReadMultiBuffer()

common/buf/writer.go

@@ -5,6 +5,8 @@ import (
 	"net"
 	"sync"
 
+	"github.com/xtls/xray-core/features/stats"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/errors"
 )
@@ -13,7 +15,8 @@ import (
 type BufferToBytesWriter struct {
 	io.Writer
 
-	cache [][]byte
+	counter stats.Counter
+	cache   [][]byte
 }
 
 // WriteMultiBuffer implements Writer. This method takes ownership of the given buffer.
@@ -26,7 +29,7 @@ func (w *BufferToBytesWriter) WriteMultiBuffer(mb MultiBuffer) error {
 	}
 
 	if len(mb) == 1 {
-		return WriteAllBytes(w.Writer, mb[0].Bytes())
+		return WriteAllBytes(w.Writer, mb[0].Bytes(), w.counter)
 	}
 
 	if cap(w.cache) < len(mb) {
@@ -45,9 +48,15 @@ func (w *BufferToBytesWriter) WriteMultiBuffer(mb MultiBuffer) error {
 	}()
 
 	nb := net.Buffers(bs)
-
+	wc := int64(0)
+	defer func() {
+		if w.counter != nil {
+			w.counter.Add(wc)
+		}
+	}()
 	for size > 0 {
 		n, err := nb.WriteTo(w.Writer)
+		wc += n
 		if err != nil {
 			return err
 		}
@@ -173,7 +182,7 @@ func (w *BufferedWriter) flushInternal() error {
 	w.buffer = nil
 
 	if writer, ok := w.writer.(io.Writer); ok {
-		err := WriteAllBytes(writer, b.Bytes())
+		err := WriteAllBytes(writer, b.Bytes(), nil)
 		b.Release()
 		return err
 	}

common/crypto/io.go

@@ -50,7 +50,7 @@ func NewCryptionWriter(stream cipher.Stream, writer io.Writer) *CryptionWriter {
 func (w *CryptionWriter) Write(data []byte) (int, error) {
 	w.stream.XORKeyStream(data, data)
 
-	if err := buf.WriteAllBytes(w.writer, data); err != nil {
+	if err := buf.WriteAllBytes(w.writer, data, nil); err != nil {
 		return 0, err
 	}
 	return len(data), nil

proxy/dns/dns.go

@@ -5,6 +5,8 @@ import (
 	"io"
 	"sync"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"golang.org/x/net/dns/dnsmessage"
 
 	"github.com/xtls/xray-core/common"
@@ -104,7 +106,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, d internet.
 	newError("handling DNS traffic to ", dest).WriteToLog(session.ExportIDToError(ctx))
 
 	conn := &outboundConn{
-		dialer: func() (internet.Connection, error) {
+		dialer: func() (stat.Connection, error) {
 			return d.Dial(ctx, dest)
 		},
 		connReady: make(chan struct{}, 1),
@@ -266,7 +268,7 @@ func (h *Handler) handleIPQuery(id uint16, qType dnsmessage.Type, domain string,
 
 type outboundConn struct {
 	access sync.Mutex
-	dialer func() (internet.Connection, error)
+	dialer func() (stat.Connection, error)
 
 	conn      net.Conn
 	connReady chan struct{}

proxy/dokodemo/dokodemo.go

@@ -7,6 +7,8 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/log"
@@ -18,7 +20,6 @@ import (
 	"github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/features/routing"
-	"github.com/xtls/xray-core/transport/internet"
 )
 
 func init() {
@@ -76,7 +77,7 @@ type hasHandshakeAddress interface {
 }
 
 // Process implements proxy.Inbound.
-func (d *DokodemoDoor) Process(ctx context.Context, network net.Network, conn internet.Connection, dispatcher routing.Dispatcher) error {
+func (d *DokodemoDoor) Process(ctx context.Context, network net.Network, conn stat.Connection, dispatcher routing.Dispatcher) error {
 	newError("processing connection from: ", conn.RemoteAddr()).AtDebug().WriteToLog(session.ExportIDToError(ctx))
 	dest := net.Destination{
 		Network: network,

proxy/freedom/freedom.go

@@ -6,6 +6,8 @@ import (
 	"context"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/dice"
@@ -121,7 +123,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 	input := link.Reader
 	output := link.Writer
 
-	var conn internet.Connection
+	var conn stat.Connection
 	err := retry.ExponentialBackoff(5, 100).On(func() error {
 		dialDest := destination
 		if h.config.useIP() && dialDest.Address.Family().IsDomain() {
@@ -194,7 +196,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 
 func NewPacketReader(conn net.Conn, UDPOverride net.Destination) buf.Reader {
 	iConn := conn
-	statConn, ok := iConn.(*internet.StatCouterConnection)
+	statConn, ok := iConn.(*stat.CounterConnection)
 	if ok {
 		iConn = statConn.Connection
 	}
@@ -238,7 +240,7 @@ func (r *PacketReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
 
 func NewPacketWriter(conn net.Conn, h *Handler, ctx context.Context, UDPOverride net.Destination) buf.Writer {
 	iConn := conn
-	statConn, ok := iConn.(*internet.StatCouterConnection)
+	statConn, ok := iConn.(*stat.CounterConnection)
 	if ok {
 		iConn = statConn.Connection
 	}

proxy/http/client.go

@@ -9,6 +9,8 @@ import (
 	"net/url"
 	"sync"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"golang.org/x/net/http2"
 
 	"github.com/xtls/xray-core/common"
@@ -77,7 +79,7 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
 	}
 
 	var user *protocol.MemoryUser
-	var conn internet.Connection
+	var conn stat.Connection
 
 	mbuf, _ := link.Reader.ReadMultiBuffer()
 	len := mbuf.Len()
@@ -101,7 +103,7 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
 					return err
 				}
 			}
-			conn = internet.Connection(netConn)
+			conn = stat.Connection(netConn)
 		}
 		return err
 	}); err != nil {
@@ -231,7 +233,7 @@ func setUpHTTPTunnel(ctx context.Context, dest net.Destination, target string, u
 	}
 
 	iConn := rawConn
-	if statConn, ok := iConn.(*internet.StatCouterConnection); ok {
+	if statConn, ok := iConn.(*stat.CounterConnection); ok {
 		iConn = statConn.Connection
 	}
 

proxy/http/server.go

@@ -9,6 +9,8 @@ import (
 	"strings"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/errors"
@@ -22,7 +24,6 @@ import (
 	"github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/features/routing"
-	"github.com/xtls/xray-core/transport/internet"
 )
 
 // Server is an HTTP proxy server.
@@ -82,7 +83,7 @@ type readerOnly struct {
 	io.Reader
 }
 
-func (s *Server) Process(ctx context.Context, network net.Network, conn internet.Connection, dispatcher routing.Dispatcher) error {
+func (s *Server) Process(ctx context.Context, network net.Network, conn stat.Connection, dispatcher routing.Dispatcher) error {
 	inbound := session.InboundFromContext(ctx)
 	if inbound != nil {
 		inbound.User = &protocol.MemoryUser{
@@ -157,7 +158,7 @@ Start:
 	return err
 }
 
-func (s *Server) handleConnect(ctx context.Context, _ *http.Request, reader *bufio.Reader, conn internet.Connection, dest net.Destination, dispatcher routing.Dispatcher, inbound *session.Inbound) error {
+func (s *Server) handleConnect(ctx context.Context, _ *http.Request, reader *bufio.Reader, conn stat.Connection, dest net.Destination, dispatcher routing.Dispatcher, inbound *session.Inbound) error {
 	_, err := conn.Write([]byte("HTTP/1.1 200 Connection established\r\n\r\n"))
 	if err != nil {
 		return newError("failed to write back OK response").Base(err)

proxy/mtproto/server.go

@@ -5,6 +5,8 @@ import (
 	"context"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/crypto"
@@ -16,7 +18,6 @@ import (
 	"github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/features/routing"
-	"github.com/xtls/xray-core/transport/internet"
 )
 
 var (
@@ -76,7 +77,7 @@ func isValidConnectionType(c [4]byte) bool {
 	return false
 }
 
-func (s *Server) Process(ctx context.Context, network net.Network, conn internet.Connection, dispatcher routing.Dispatcher) error {
+func (s *Server) Process(ctx context.Context, network net.Network, conn stat.Connection, dispatcher routing.Dispatcher) error {
 	sPolicy := s.policy.ForLevel(s.user.Level)
 
 	if err := conn.SetDeadline(time.Now().Add(sPolicy.Timeouts.Handshake)); err != nil {

proxy/proxy.go

@@ -8,6 +8,8 @@ package proxy
 import (
 	"context"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/protocol"
 	"github.com/xtls/xray-core/features/routing"
@@ -21,7 +23,7 @@ type Inbound interface {
 	Network() []net.Network
 
 	// Process processes a connection of given network. If necessary, the Inbound can dispatch the connection to an Outbound.
-	Process(context.Context, net.Network, internet.Connection, routing.Dispatcher) error
+	Process(context.Context, net.Network, stat.Connection, routing.Dispatcher) error
 }
 
 // An Outbound process outbound connections.

proxy/shadowsocks/client.go

@@ -3,6 +3,8 @@ package shadowsocks
 import (
 	"context"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/net"
@@ -55,7 +57,7 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
 	network := destination.Network
 
 	var server *protocol.ServerSpec
-	var conn internet.Connection
+	var conn stat.Connection
 
 	err := retry.ExponentialBackoff(5, 100).On(func() error {
 		server = c.serverPicker.PickServer()

proxy/shadowsocks/protocol.go

@@ -173,7 +173,7 @@ func WriteTCPRequest(request *protocol.RequestHeader, writer io.Writer) (buf.Wri
 	if account.Cipher.IVSize() > 0 {
 		iv = make([]byte, account.Cipher.IVSize())
 		common.Must2(rand.Read(iv))
-		if err := buf.WriteAllBytes(writer, iv); err != nil {
+		if err := buf.WriteAllBytes(writer, iv, nil); err != nil {
 			return nil, newError("failed to write IV")
 		}
 	}
@@ -218,7 +218,7 @@ func WriteTCPResponse(request *protocol.RequestHeader, writer io.Writer) (buf.Wr
 	if account.Cipher.IVSize() > 0 {
 		iv = make([]byte, account.Cipher.IVSize())
 		common.Must2(rand.Read(iv))
-		if err := buf.WriteAllBytes(writer, iv); err != nil {
+		if err := buf.WriteAllBytes(writer, iv, nil); err != nil {
 			return nil, newError("failed to write IV.").Base(err)
 		}
 	}

proxy/shadowsocks/server.go

@@ -4,6 +4,8 @@ import (
 	"context"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/log"
@@ -16,7 +18,6 @@ import (
 	"github.com/xtls/xray-core/core"
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/features/routing"
-	"github.com/xtls/xray-core/transport/internet"
 	"github.com/xtls/xray-core/transport/internet/udp"
 )
 
@@ -70,7 +71,7 @@ func (s *Server) Network() []net.Network {
 	return list
 }
 
-func (s *Server) Process(ctx context.Context, network net.Network, conn internet.Connection, dispatcher routing.Dispatcher) error {
+func (s *Server) Process(ctx context.Context, network net.Network, conn stat.Connection, dispatcher routing.Dispatcher) error {
 	switch network {
 	case net.Network_TCP:
 		return s.handleConnection(ctx, conn, dispatcher)
@@ -81,7 +82,7 @@ func (s *Server) Process(ctx context.Context, network net.Network, conn internet
 	}
 }
 
-func (s *Server) handleUDPPayload(ctx context.Context, conn internet.Connection, dispatcher routing.Dispatcher) error {
+func (s *Server) handleUDPPayload(ctx context.Context, conn stat.Connection, dispatcher routing.Dispatcher) error {
 	udpServer := udp.NewDispatcher(dispatcher, func(ctx context.Context, packet *udp_proto.Packet) {
 		request := protocol.RequestHeaderFromContext(ctx)
 		if request == nil {
@@ -185,7 +186,7 @@ func (s *Server) handleUDPPayload(ctx context.Context, conn internet.Connection,
 	return nil
 }
 
-func (s *Server) handleConnection(ctx context.Context, conn internet.Connection, dispatcher routing.Dispatcher) error {
+func (s *Server) handleConnection(ctx context.Context, conn stat.Connection, dispatcher routing.Dispatcher) error {
 	sessionPolicy := s.policyManager.ForLevel(0)
 	if err := conn.SetReadDeadline(time.Now().Add(sessionPolicy.Timeouts.Handshake)); err != nil {
 		return newError("unable to set read deadline").Base(err).AtWarning()

proxy/socks/client.go

@@ -4,6 +4,8 @@ import (
 	"context"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/net"
@@ -59,7 +61,7 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
 	// Outbound server's destination.
 	var dest net.Destination
 	// Connection to the outbound server.
-	var conn internet.Connection
+	var conn stat.Connection
 
 	if err := retry.ExponentialBackoff(5, 100).On(func() error {
 		server = c.serverPicker.PickServer()

proxy/socks/protocol.go

@@ -293,7 +293,7 @@ func hasAuthMethod(expectedAuth byte, authCandidates []byte) bool {
 }
 
 func writeSocks5AuthenticationResponse(writer io.Writer, version byte, auth byte) error {
-	return buf.WriteAllBytes(writer, []byte{version, auth})
+	return buf.WriteAllBytes(writer, []byte{version, auth}, nil)
 }
 
 func writeSocks5Response(writer io.Writer, errCode byte, address net.Address, port net.Port) error {
@@ -305,7 +305,7 @@ func writeSocks5Response(writer io.Writer, errCode byte, address net.Address, po
 		return err
 	}
 
-	return buf.WriteAllBytes(writer, buffer.Bytes())
+	return buf.WriteAllBytes(writer, buffer.Bytes(), nil)
 }
 
 func writeSocks4Response(writer io.Writer, errCode byte, address net.Address, port net.Port) error {
@@ -317,7 +317,7 @@ func writeSocks4Response(writer io.Writer, errCode byte, address net.Address, po
 	portBytes := buffer.Extend(2)
 	binary.BigEndian.PutUint16(portBytes, port.Value())
 	common.Must2(buffer.Write(address.IP()))
-	return buf.WriteAllBytes(writer, buffer.Bytes())
+	return buf.WriteAllBytes(writer, buffer.Bytes(), nil)
 }
 
 func DecodeUDPPacket(packet *buf.Buffer) (*protocol.RequestHeader, error) {
@@ -422,7 +422,7 @@ func ClientHandshake(request *protocol.RequestHeader, reader io.Reader, writer i
 	defer b.Release()
 
 	common.Must2(b.Write([]byte{socks5Version, 0x01, authByte}))
-	if err := buf.WriteAllBytes(writer, b.Bytes()); err != nil {
+	if err := buf.WriteAllBytes(writer, b.Bytes(), nil); err != nil {
 		return nil, err
 	}
 
@@ -446,7 +446,7 @@ func ClientHandshake(request *protocol.RequestHeader, reader io.Reader, writer i
 		common.Must2(b.WriteString(account.Username))
 		common.Must(b.WriteByte(byte(len(account.Password))))
 		common.Must2(b.WriteString(account.Password))
-		if err := buf.WriteAllBytes(writer, b.Bytes()); err != nil {
+		if err := buf.WriteAllBytes(writer, b.Bytes(), nil); err != nil {
 			return nil, err
 		}
 
@@ -474,7 +474,7 @@ func ClientHandshake(request *protocol.RequestHeader, reader io.Reader, writer i
 		}
 	}
 
-	if err := buf.WriteAllBytes(writer, b.Bytes()); err != nil {
+	if err := buf.WriteAllBytes(writer, b.Bytes(), nil); err != nil {
 		return nil, err
 	}
 

proxy/socks/server.go

@@ -5,6 +5,8 @@ import (
 	"io"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/log"
@@ -18,7 +20,6 @@ import (
 	"github.com/xtls/xray-core/features"
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/features/routing"
-	"github.com/xtls/xray-core/transport/internet"
 	"github.com/xtls/xray-core/transport/internet/udp"
 )
 
@@ -62,7 +63,7 @@ func (s *Server) Network() []net.Network {
 }
 
 // Process implements proxy.Inbound.
-func (s *Server) Process(ctx context.Context, network net.Network, conn internet.Connection, dispatcher routing.Dispatcher) error {
+func (s *Server) Process(ctx context.Context, network net.Network, conn stat.Connection, dispatcher routing.Dispatcher) error {
 	if inbound := session.InboundFromContext(ctx); inbound != nil {
 		inbound.User = &protocol.MemoryUser{
 			Level: s.config.UserLevel,
@@ -79,7 +80,7 @@ func (s *Server) Process(ctx context.Context, network net.Network, conn internet
 	}
 }
 
-func (s *Server) processTCP(ctx context.Context, conn internet.Connection, dispatcher routing.Dispatcher) error {
+func (s *Server) processTCP(ctx context.Context, conn stat.Connection, dispatcher routing.Dispatcher) error {
 	plcy := s.policy()
 	if err := conn.SetReadDeadline(time.Now().Add(plcy.Timeouts.Handshake)); err != nil {
 		newError("failed to set deadline").Base(err).WriteToLog(session.ExportIDToError(ctx))
@@ -191,7 +192,7 @@ func (s *Server) transport(ctx context.Context, reader io.Reader, writer io.Writ
 	return nil
 }
 
-func (s *Server) handleUDPPayload(ctx context.Context, conn internet.Connection, dispatcher routing.Dispatcher) error {
+func (s *Server) handleUDPPayload(ctx context.Context, conn stat.Connection, dispatcher routing.Dispatcher) error {
 	udpServer := udp.NewDispatcher(dispatcher, func(ctx context.Context, packet *udp_proto.Packet) {
 		payload := packet.Payload
 		newError("writing back UDP response with ", payload.Len(), " bytes").AtDebug().WriteToLog(session.ExportIDToError(ctx))

proxy/trojan/client.go

@@ -5,6 +5,8 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/errors"
@@ -61,7 +63,7 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
 	network := destination.Network
 
 	var server *protocol.ServerSpec
-	var conn internet.Connection
+	var conn stat.Connection
 
 	err := retry.ExponentialBackoff(5, 100).On(func() error {
 		server = c.serverPicker.PickServer()
@@ -81,7 +83,7 @@ func (c *Client) Process(ctx context.Context, link *transport.Link, dialer inter
 	defer conn.Close()
 
 	iConn := conn
-	statConn, ok := iConn.(*internet.StatCouterConnection)
+	statConn, ok := iConn.(*stat.CounterConnection)
 	if ok {
 		iConn = statConn.Connection
 	}

proxy/trojan/protocol.go

@@ -8,6 +8,8 @@ import (
 	"runtime"
 	"syscall"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
@@ -15,7 +17,6 @@ import (
 	"github.com/xtls/xray-core/common/session"
 	"github.com/xtls/xray-core/common/signal"
 	"github.com/xtls/xray-core/features/stats"
-	"github.com/xtls/xray-core/transport/internet"
 	"github.com/xtls/xray-core/transport/internet/xtls"
 )
 
@@ -298,7 +299,7 @@ func ReadV(reader buf.Reader, writer buf.Writer, timer signal.ActivityUpdater, c
 				if sctx != nil {
 					if inbound := session.InboundFromContext(sctx); inbound != nil && inbound.Conn != nil {
 						iConn := inbound.Conn
-						statConn, ok := iConn.(*internet.StatCouterConnection)
+						statConn, ok := iConn.(*stat.CounterConnection)
 						if ok {
 							iConn = statConn.Connection
 						}
@@ -325,7 +326,7 @@ func ReadV(reader buf.Reader, writer buf.Writer, timer signal.ActivityUpdater, c
 						//panic("XTLS Splice: nil inbound or nil inbound.Conn")
 					}
 				}
-				reader = buf.NewReadVReader(conn.Connection, rawConn)
+				reader = buf.NewReadVReader(conn.Connection, rawConn, nil)
 				ct = counter
 				if conn.SHOW {
 					fmt.Println(conn.MARK, "ReadV")

proxy/trojan/server.go

@@ -9,6 +9,8 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/errors"
@@ -25,7 +27,6 @@ import (
 	"github.com/xtls/xray-core/features/policy"
 	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/features/stats"
-	"github.com/xtls/xray-core/transport/internet"
 	"github.com/xtls/xray-core/transport/internet/udp"
 	"github.com/xtls/xray-core/transport/internet/xtls"
 )
@@ -141,11 +142,11 @@ func (s *Server) Network() []net.Network {
 }
 
 // Process implements proxy.Inbound.Process().
-func (s *Server) Process(ctx context.Context, network net.Network, conn internet.Connection, dispatcher routing.Dispatcher) error {
+func (s *Server) Process(ctx context.Context, network net.Network, conn stat.Connection, dispatcher routing.Dispatcher) error {
 	sid := session.ExportIDToError(ctx)
 
 	iConn := conn
-	statConn, ok := iConn.(*internet.StatCouterConnection)
+	statConn, ok := iConn.(*stat.CounterConnection)
 	if ok {
 		iConn = statConn.Connection
 	}
@@ -343,7 +344,7 @@ func (s *Server) handleUDPPayload(ctx context.Context, clientReader *PacketReade
 func (s *Server) handleConnection(ctx context.Context, sessionPolicy policy.Session,
 	destination net.Destination,
 	clientReader buf.Reader,
-	clientWriter buf.Writer, dispatcher routing.Dispatcher, iConn internet.Connection, rawConn syscall.RawConn, statConn *internet.StatCouterConnection) error {
+	clientWriter buf.Writer, dispatcher routing.Dispatcher, iConn stat.Connection, rawConn syscall.RawConn, statConn *stat.CounterConnection) error {
 	ctx, cancel := context.WithCancel(ctx)
 	timer := signal.CancelAfterInactivity(ctx, cancel, sessionPolicy.Timeouts.ConnectionIdle)
 	ctx = policy.ContextWithBufferPolicy(ctx, sessionPolicy.Buffer)
@@ -391,7 +392,7 @@ func (s *Server) handleConnection(ctx context.Context, sessionPolicy policy.Sess
 	return nil
 }
 
-func (s *Server) fallback(ctx context.Context, sid errors.ExportOption, err error, sessionPolicy policy.Session, connection internet.Connection, iConn internet.Connection, napfb map[string]map[string]map[string]*Fallback, first *buf.Buffer, firstLen int64, reader buf.Reader) error {
+func (s *Server) fallback(ctx context.Context, sid errors.ExportOption, err error, sessionPolicy policy.Session, connection stat.Connection, iConn stat.Connection, napfb map[string]map[string]map[string]*Fallback, first *buf.Buffer, firstLen int64, reader buf.Reader) error {
 	if err := connection.SetReadDeadline(time.Time{}); err != nil {
 		newError("unable to set back read deadline").Base(err).AtWarning().WriteToLog(sid)
 	}

proxy/vless/encoding/encoding.go

@@ -9,6 +9,8 @@ import (
 	"runtime"
 	"syscall"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
@@ -17,7 +19,6 @@ import (
 	"github.com/xtls/xray-core/common/signal"
 	"github.com/xtls/xray-core/features/stats"
 	"github.com/xtls/xray-core/proxy/vless"
-	"github.com/xtls/xray-core/transport/internet"
 	"github.com/xtls/xray-core/transport/internet/xtls"
 )
 
@@ -185,7 +186,7 @@ func ReadV(reader buf.Reader, writer buf.Writer, timer signal.ActivityUpdater, c
 				if sctx != nil {
 					if inbound := session.InboundFromContext(sctx); inbound != nil && inbound.Conn != nil {
 						iConn := inbound.Conn
-						statConn, ok := iConn.(*internet.StatCouterConnection)
+						statConn, ok := iConn.(*stat.CounterConnection)
 						if ok {
 							iConn = statConn.Connection
 						}
@@ -212,7 +213,7 @@ func ReadV(reader buf.Reader, writer buf.Writer, timer signal.ActivityUpdater, c
 						//panic("XTLS Splice: nil inbound or nil inbound.Conn")
 					}
 				}
-				reader = buf.NewReadVReader(conn.Connection, rawConn)
+				reader = buf.NewReadVReader(conn.Connection, rawConn, nil)
 				ct = counter
 				if conn.SHOW {
 					fmt.Println(conn.MARK, "ReadV")

proxy/vless/inbound/inbound.go

@@ -10,6 +10,8 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/errors"
@@ -29,7 +31,6 @@ import (
 	"github.com/xtls/xray-core/features/stats"
 	"github.com/xtls/xray-core/proxy/vless"
 	"github.com/xtls/xray-core/proxy/vless/encoding"
-	"github.com/xtls/xray-core/transport/internet"
 	"github.com/xtls/xray-core/transport/internet/tls"
 	"github.com/xtls/xray-core/transport/internet/xtls"
 )
@@ -172,11 +173,11 @@ func (*Handler) Network() []net.Network {
 }
 
 // Process implements proxy.Inbound.Process().
-func (h *Handler) Process(ctx context.Context, network net.Network, connection internet.Connection, dispatcher routing.Dispatcher) error {
+func (h *Handler) Process(ctx context.Context, network net.Network, connection stat.Connection, dispatcher routing.Dispatcher) error {
 	sid := session.ExportIDToError(ctx)
 
 	iConn := connection
-	statConn, ok := iConn.(*internet.StatCouterConnection)
+	statConn, ok := iConn.(*stat.CounterConnection)
 	if ok {
 		iConn = statConn.Connection
 	}

proxy/vless/outbound/outbound.go

@@ -7,6 +7,8 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/net"
@@ -77,7 +79,7 @@ func New(ctx context.Context, config *Config) (*Handler, error) {
 // Process implements proxy.Outbound.Process().
 func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer internet.Dialer) error {
 	var rec *protocol.ServerSpec
-	var conn internet.Connection
+	var conn stat.Connection
 
 	if err := retry.ExponentialBackoff(5, 200).On(func() error {
 		rec = h.serverPicker.PickServer()
@@ -93,7 +95,7 @@ func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer inte
 	defer conn.Close()
 
 	iConn := conn
-	statConn, ok := iConn.(*internet.StatCouterConnection)
+	statConn, ok := iConn.(*stat.CounterConnection)
 	if ok {
 		iConn = statConn.Connection
 	}

proxy/vmess/inbound/inbound.go

@@ -9,6 +9,8 @@ import (
 	"sync"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/errors"
@@ -26,7 +28,6 @@ import (
 	"github.com/xtls/xray-core/features/routing"
 	"github.com/xtls/xray-core/proxy/vmess"
 	"github.com/xtls/xray-core/proxy/vmess/encoding"
-	"github.com/xtls/xray-core/transport/internet"
 )
 
 var (
@@ -220,14 +221,14 @@ func isInsecureEncryption(s protocol.SecurityType) bool {
 }
 
 // Process implements proxy.Inbound.Process().
-func (h *Handler) Process(ctx context.Context, network net.Network, connection internet.Connection, dispatcher routing.Dispatcher) error {
+func (h *Handler) Process(ctx context.Context, network net.Network, connection stat.Connection, dispatcher routing.Dispatcher) error {
 	sessionPolicy := h.policyManager.ForLevel(0)
 	if err := connection.SetReadDeadline(time.Now().Add(sessionPolicy.Timeouts.Handshake)); err != nil {
 		return newError("unable to set read deadline").Base(err).AtWarning()
 	}
 
 	iConn := connection
-	if statConn, ok := iConn.(*internet.StatCouterConnection); ok {
+	if statConn, ok := iConn.(*stat.CounterConnection); ok {
 		iConn = statConn.Connection
 	}
 	_, isDrain := iConn.(*net.TCPConn)

proxy/vmess/outbound/outbound.go

@@ -6,6 +6,8 @@ import (
 	"context"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/net"
@@ -57,7 +59,7 @@ func New(ctx context.Context, config *Config) (*Handler, error) {
 // Process implements proxy.Outbound.Process().
 func (h *Handler) Process(ctx context.Context, link *transport.Link, dialer internet.Dialer) error {
 	var rec *protocol.ServerSpec
-	var conn internet.Connection
+	var conn stat.Connection
 
 	err := retry.ExponentialBackoff(5, 200).On(func() error {
 		rec = h.serverPicker.PickServer()

testing/mocks/proxy.go

@@ -6,12 +6,14 @@ package mocks
 
 import (
 	context "context"
+	reflect "reflect"
+
 	gomock "github.com/golang/mock/gomock"
 	net "github.com/xtls/xray-core/common/net"
 	routing "github.com/xtls/xray-core/features/routing"
 	transport "github.com/xtls/xray-core/transport"
 	internet "github.com/xtls/xray-core/transport/internet"
-	reflect "reflect"
+	"github.com/xtls/xray-core/transport/internet/stat"
 )
 
 // ProxyInbound is a mock of Inbound interface
@@ -52,7 +54,7 @@ func (mr *ProxyInboundMockRecorder) Network() *gomock.Call {
 }
 
 // Process mocks base method
-func (m *ProxyInbound) Process(arg0 context.Context, arg1 net.Network, arg2 internet.Connection, arg3 routing.Dispatcher) error {
+func (m *ProxyInbound) Process(arg0 context.Context, arg1 net.Network, arg2 stat.Connection, arg3 routing.Dispatcher) error {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Process", arg0, arg1, arg2, arg3)
 	ret0, _ := ret[0].(error)

transport/internet/dialer.go

@@ -5,6 +5,8 @@ import (
 
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/dice"
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/net/cnc"
 	"github.com/xtls/xray-core/common/session"
@@ -17,14 +19,14 @@ import (
 // Dialer is the interface for dialing outbound connections.
 type Dialer interface {
 	// Dial dials a system connection to the given destination.
-	Dial(ctx context.Context, destination net.Destination) (Connection, error)
+	Dial(ctx context.Context, destination net.Destination) (stat.Connection, error)
 
 	// Address returns the address used by this Dialer. Maybe nil if not known.
 	Address() net.Address
 }
 
 // dialFunc is an interface to dial network connection to a specific destination.
-type dialFunc func(ctx context.Context, dest net.Destination, streamSettings *MemoryStreamConfig) (Connection, error)
+type dialFunc func(ctx context.Context, dest net.Destination, streamSettings *MemoryStreamConfig) (stat.Connection, error)
 
 var (
 	transportDialerCache = make(map[string]dialFunc)
@@ -40,7 +42,7 @@ func RegisterTransportDialer(protocol string, dialer dialFunc) error {
 }
 
 // Dial dials a internet connection towards the given destination.
-func Dial(ctx context.Context, dest net.Destination, streamSettings *MemoryStreamConfig) (Connection, error) {
+func Dial(ctx context.Context, dest net.Destination, streamSettings *MemoryStreamConfig) (stat.Connection, error) {
 	if dest.Network == net.Network_TCP {
 		if streamSettings == nil {
 			s, err := ToMemoryStreamConfig(nil)

transport/internet/domainsocket/dial.go

@@ -6,6 +6,8 @@ package domainsocket
 import (
 	"context"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/transport/internet"
@@ -13,7 +15,7 @@ import (
 	"github.com/xtls/xray-core/transport/internet/xtls"
 )
 
-func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) {
+func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (stat.Connection, error) {
 	settings := streamSettings.ProtocolSettings.(*Config)
 	addr, err := settings.GetUnixAddr()
 	if err != nil {

transport/internet/domainsocket/listener.go

@@ -9,6 +9,8 @@ import (
 	"os"
 	"strings"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	goxtls "github.com/xtls/go"
 	"golang.org/x/sys/unix"
 
@@ -98,7 +100,7 @@ func (ln *Listener) run() {
 			conn = xtls.Server(conn, ln.xtlsConfig)
 		}
 
-		ln.addConn(internet.Connection(conn))
+		ln.addConn(stat.Connection(conn))
 	}
 }
 

transport/internet/domainsocket/listener_test.go

@@ -8,6 +8,8 @@ import (
 	"runtime"
 	"testing"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/net"
@@ -23,7 +25,7 @@ func TestListen(t *testing.T) {
 			Path: "/tmp/ts3",
 		},
 	}
-	listener, err := Listen(ctx, nil, net.Port(0), streamSettings, func(conn internet.Connection) {
+	listener, err := Listen(ctx, nil, net.Port(0), streamSettings, func(conn stat.Connection) {
 		defer conn.Close()
 
 		b := buf.New()
@@ -64,7 +66,7 @@ func TestListenAbstract(t *testing.T) {
 			Abstract: true,
 		},
 	}
-	listener, err := Listen(ctx, nil, net.Port(0), streamSettings, func(conn internet.Connection) {
+	listener, err := Listen(ctx, nil, net.Port(0), streamSettings, func(conn stat.Connection) {
 		defer conn.Close()
 
 		b := buf.New()

transport/internet/grpc/dial.go

@@ -17,17 +17,18 @@ import (
 	"github.com/xtls/xray-core/common/session"
 	"github.com/xtls/xray-core/transport/internet"
 	"github.com/xtls/xray-core/transport/internet/grpc/encoding"
+	"github.com/xtls/xray-core/transport/internet/stat"
 	"github.com/xtls/xray-core/transport/internet/tls"
 )
 
-func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) {
+func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (stat.Connection, error) {
 	newError("creating connection to ", dest).WriteToLog(session.ExportIDToError(ctx))
 
 	conn, err := dialgRPC(ctx, dest, streamSettings)
 	if err != nil {
 		return nil, newError("failed to dial gRPC").Base(err)
 	}
-	return internet.Connection(conn), nil
+	return stat.Connection(conn), nil
 }
 
 func init() {

transport/internet/headers/http/http.go

@@ -151,7 +151,7 @@ func (w *HeaderWriter) Write(writer io.Writer) error {
 	if w.header == nil {
 		return nil
 	}
-	err := buf.WriteAllBytes(writer, w.header.Bytes())
+	err := buf.WriteAllBytes(writer, w.header.Bytes(), nil)
 	w.header.Release()
 	w.header = nil
 	return err

transport/internet/http/dialer.go

@@ -8,6 +8,8 @@ import (
 	"sync"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/net"
@@ -110,7 +112,7 @@ func getHTTPClient(ctx context.Context, dest net.Destination, streamSettings *in
 }
 
 // Dial dials a new TCP connection to the given destination.
-func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) {
+func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (stat.Connection, error) {
 	httpSettings := streamSettings.ProtocolSettings.(*Config)
 	client, err := getHTTPClient(ctx, dest, streamSettings)
 	if err != nil {

transport/internet/http/http_test.go

@@ -6,6 +6,8 @@ import (
 	"testing"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/google/go-cmp/cmp"
 
 	"github.com/xtls/xray-core/common"
@@ -28,7 +30,7 @@ func TestHTTPConnection(t *testing.T) {
 		SecuritySettings: &tls.Config{
 			Certificate: []*tls.Certificate{tls.ParseCertificate(cert.MustGenerate(nil, cert.CommonName("www.example.com")))},
 		},
-	}, func(conn internet.Connection) {
+	}, func(conn stat.Connection) {
 		go func() {
 			defer conn.Close()
 

transport/internet/kcp/dialer.go

@@ -5,6 +5,8 @@ import (
 	"io"
 	"sync/atomic"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/buf"
 	"github.com/xtls/xray-core/common/dice"
@@ -46,7 +48,7 @@ func fetchInput(_ context.Context, input io.Reader, reader PacketReader, conn *C
 }
 
 // DialKCP dials a new KCP connections to the specific destination.
-func DialKCP(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) {
+func DialKCP(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (stat.Connection, error) {
 	dest.Network = net.Network_UDP
 	newError("dialing mKCP to ", dest).WriteToLog()
 
@@ -84,7 +86,7 @@ func DialKCP(ctx context.Context, dest net.Destination, streamSettings *internet
 
 	go fetchInput(ctx, rawConn, reader, session)
 
-	var iConn internet.Connection = session
+	var iConn stat.Connection = session
 
 	if config := tls.ConfigFromStreamSettings(streamSettings); config != nil {
 		iConn = tls.Client(iConn, config.GetTLSConfig(tls.WithDestination(dest)))

transport/internet/kcp/kcp_test.go

@@ -7,6 +7,8 @@ import (
 	"testing"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/google/go-cmp/cmp"
 	"golang.org/x/sync/errgroup"
 
@@ -21,8 +23,8 @@ func TestDialAndListen(t *testing.T) {
 	listerner, err := NewListener(context.Background(), net.LocalHostIP, net.Port(0), &internet.MemoryStreamConfig{
 		ProtocolName:     "mkcp",
 		ProtocolSettings: &Config{},
-	}, func(conn internet.Connection) {
-		go func(c internet.Connection) {
+	}, func(conn stat.Connection) {
+		go func(c stat.Connection) {
 			payload := make([]byte, 4096)
 			for {
 				nBytes, err := c.Read(payload)

transport/internet/kcp/listener.go

@@ -6,6 +6,8 @@ import (
 	gotls "crypto/tls"
 	"sync"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	goxtls "github.com/xtls/go"
 
 	"github.com/xtls/xray-core/common"
@@ -134,7 +136,7 @@ func (l *Listener) OnReceive(payload *buf.Buffer, src net.Destination) {
 			Security: l.security,
 			Writer:   writer,
 		}, writer, l.config)
-		var netConn internet.Connection = conn
+		var netConn stat.Connection = conn
 		if l.tlsConfig != nil {
 			netConn = tls.Server(conn, l.tlsConfig)
 		} else if l.xtlsConfig != nil {

transport/internet/quic/dialer.go

@@ -5,6 +5,8 @@ import (
 	"sync"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/lucas-clemente/quic-go"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
@@ -114,7 +116,7 @@ func (s *clientSessions) cleanSessions() error {
 	return nil
 }
 
-func (s *clientSessions) openConnection(destAddr net.Addr, config *Config, tlsConfig *tls.Config, sockopt *internet.SocketConfig) (internet.Connection, error) {
+func (s *clientSessions) openConnection(destAddr net.Addr, config *Config, tlsConfig *tls.Config, sockopt *internet.SocketConfig) (stat.Connection, error) {
 	s.access.Lock()
 	defer s.access.Unlock()
 
@@ -182,7 +184,7 @@ func init() {
 	common.Must(client.cleanup.Start())
 }
 
-func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) {
+func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (stat.Connection, error) {
 	tlsConfig := tls.ConfigFromStreamSettings(streamSettings)
 	if tlsConfig == nil {
 		tlsConfig = &tls.Config{

transport/internet/quic/quic_test.go

@@ -6,6 +6,8 @@ import (
 	"testing"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/google/go-cmp/cmp"
 
 	"github.com/xtls/xray-core/common"
@@ -37,7 +39,7 @@ func TestQuicConnection(t *testing.T) {
 				),
 			},
 		},
-	}, func(conn internet.Connection) {
+	}, func(conn stat.Connection) {
 		go func() {
 			defer conn.Close()
 
@@ -100,7 +102,7 @@ func TestQuicConnectionWithoutTLS(t *testing.T) {
 	listener, err := quic.Listen(context.Background(), net.LocalHostIP, port, &internet.MemoryStreamConfig{
 		ProtocolName:     "quic",
 		ProtocolSettings: &quic.Config{},
-	}, func(conn internet.Connection) {
+	}, func(conn stat.Connection) {
 		go func() {
 			defer conn.Close()
 
@@ -164,7 +166,7 @@ func TestQuicConnectionAuthHeader(t *testing.T) {
 				Type: protocol.SecurityType_AES128_GCM,
 			},
 		},
-	}, func(conn internet.Connection) {
+	}, func(conn stat.Connection) {
 		go func() {
 			defer conn.Close()
 

transport/internet/stat/connection.go

@@ -1,4 +1,4 @@
-package internet
+package stat
 
 import (
 	"net"
@@ -10,13 +10,13 @@ type Connection interface {
 	net.Conn
 }
 
-type StatCouterConnection struct {
+type CounterConnection struct {
 	Connection
 	ReadCounter  stats.Counter
 	WriteCounter stats.Counter
 }
 
-func (c *StatCouterConnection) Read(b []byte) (int, error) {
+func (c *CounterConnection) Read(b []byte) (int, error) {
 	nBytes, err := c.Connection.Read(b)
 	if c.ReadCounter != nil {
 		c.ReadCounter.Add(int64(nBytes))
@@ -25,7 +25,7 @@ func (c *StatCouterConnection) Read(b []byte) (int, error) {
 	return nBytes, err
 }
 
-func (c *StatCouterConnection) Write(b []byte) (int, error) {
+func (c *CounterConnection) Write(b []byte) (int, error) {
 	nBytes, err := c.Connection.Write(b)
 	if c.WriteCounter != nil {
 		c.WriteCounter.Add(int64(nBytes))

transport/internet/tcp/dialer.go

@@ -3,6 +3,8 @@ package tcp
 import (
 	"context"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/session"
@@ -12,7 +14,7 @@ import (
 )
 
 // Dial dials a new TCP connection to the given destination.
-func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) {
+func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (stat.Connection, error) {
 	newError("dialing TCP to ", dest).WriteToLog(session.ExportIDToError(ctx))
 	conn, err := internet.DialSystem(ctx, dest, streamSettings.SocketSettings)
 	if err != nil {
@@ -46,7 +48,7 @@ func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.Me
 		}
 		conn = auth.Client(conn)
 	}
-	return internet.Connection(conn), nil
+	return stat.Connection(conn), nil
 }
 
 func init() {

transport/internet/tcp/hub.go

@@ -6,6 +6,8 @@ import (
 	"strings"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	goxtls "github.com/xtls/go"
 
 	"github.com/xtls/xray-core/common"
@@ -120,7 +122,7 @@ func (v *Listener) keepAccepting() {
 			conn = v.authConfig.Server(conn)
 		}
 
-		v.addConn(internet.Connection(conn))
+		v.addConn(stat.Connection(conn))
 	}
 }
 

transport/internet/tcp/sockopt_freebsd.go

@@ -5,10 +5,11 @@ package tcp
 import (
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/transport/internet"
+	"github.com/xtls/xray-core/transport/internet/stat"
 )
 
 // GetOriginalDestination from tcp conn
-func GetOriginalDestination(conn internet.Connection) (net.Destination, error) {
+func GetOriginalDestination(conn stat.Connection) (net.Destination, error) {
 	la := conn.LocalAddr()
 	ra := conn.RemoteAddr()
 	ip, port, err := internet.OriginalDst(la, ra)

transport/internet/tcp/sockopt_linux.go

@@ -6,13 +6,14 @@ import (
 	"syscall"
 	"unsafe"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common/net"
-	"github.com/xtls/xray-core/transport/internet"
 )
 
 const SO_ORIGINAL_DST = 80
 
-func GetOriginalDestination(conn internet.Connection) (net.Destination, error) {
+func GetOriginalDestination(conn stat.Connection) (net.Destination, error) {
 	sysrawconn, f := conn.(syscall.Conn)
 	if !f {
 		return net.Destination{}, newError("unable to get syscall.Conn")

transport/internet/tcp/sockopt_other.go

@@ -4,9 +4,9 @@ package tcp
 
 import (
 	"github.com/xtls/xray-core/common/net"
-	"github.com/xtls/xray-core/transport/internet"
+	"github.com/xtls/xray-core/transport/internet/stat"
 )
 
-func GetOriginalDestination(conn internet.Connection) (net.Destination, error) {
+func GetOriginalDestination(conn stat.Connection) (net.Destination, error) {
 	return net.Destination{}, nil
 }

transport/internet/tcp_hub.go

@@ -3,6 +3,8 @@ package internet
 import (
 	"context"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common/net"
 )
 
@@ -18,7 +20,7 @@ func RegisterTransportListener(protocol string, listener ListenFunc) error {
 	return nil
 }
 
-type ConnHandler func(Connection)
+type ConnHandler func(stat.Connection)
 
 type ListenFunc func(ctx context.Context, address net.Address, port net.Port, settings *MemoryStreamConfig, handler ConnHandler) (Listener, error)
 

transport/internet/udp/dialer.go

@@ -3,6 +3,8 @@ package udp
 import (
 	"context"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/transport/internet"
@@ -10,7 +12,7 @@ import (
 
 func init() {
 	common.Must(internet.RegisterTransportDialer(protocolName,
-		func(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) {
+		func(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (stat.Connection, error) {
 			var sockopt *internet.SocketConfig
 			if streamSettings != nil {
 				sockopt = streamSettings.SocketSettings
@@ -20,6 +22,6 @@ func init() {
 				return nil, err
 			}
 			// TODO: handle dialer options
-			return internet.Connection(conn), nil
+			return stat.Connection(conn), nil
 		}))
 }

transport/internet/websocket/dialer.go

@@ -10,6 +10,8 @@ import (
 	"os"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/gorilla/websocket"
 
 	"github.com/xtls/xray-core/common"
@@ -41,7 +43,7 @@ func init() {
 }
 
 // Dial dials a WebSocket connection to the given destination.
-func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) {
+func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (stat.Connection, error) {
 	newError("creating connection to ", dest).WriteToLog(session.ExportIDToError(ctx))
 	var conn net.Conn
 	if streamSettings.ProtocolSettings.(*Config).Ed > 0 {
@@ -59,7 +61,7 @@ func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.Me
 			return nil, newError("failed to dial WebSocket").Base(err)
 		}
 	}
-	return internet.Connection(conn), nil
+	return stat.Connection(conn), nil
 }
 
 func init() {

transport/internet/websocket/ws_test.go

@@ -6,6 +6,8 @@ import (
 	"testing"
 	"time"
 
+	"github.com/xtls/xray-core/transport/internet/stat"
+
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/net"
 	"github.com/xtls/xray-core/common/protocol/tls/cert"
@@ -20,8 +22,8 @@ func Test_listenWSAndDial(t *testing.T) {
 		ProtocolSettings: &Config{
 			Path: "ws",
 		},
-	}, func(conn internet.Connection) {
-		go func(c internet.Connection) {
+	}, func(conn stat.Connection) {
+		go func(c stat.Connection) {
 			defer c.Close()
 
 			var b [1024]byte
@@ -75,8 +77,8 @@ func TestDialWithRemoteAddr(t *testing.T) {
 		ProtocolSettings: &Config{
 			Path: "ws",
 		},
-	}, func(conn internet.Connection) {
-		go func(c internet.Connection) {
+	}, func(conn stat.Connection) {
+		go func(c stat.Connection) {
 			defer c.Close()
 
 			var b [1024]byte
@@ -129,7 +131,7 @@ func Test_listenWSAndDial_TLS(t *testing.T) {
 			Certificate:   []*tls.Certificate{tls.ParseCertificate(cert.MustGenerate(nil, cert.CommonName("localhost")))},
 		},
 	}
-	listen, err := ListenWS(context.Background(), net.LocalHostIP, 13143, streamSettings, func(conn internet.Connection) {
+	listen, err := ListenWS(context.Background(), net.LocalHostIP, 13143, streamSettings, func(conn stat.Connection) {
 		go func() {
 			_ = conn.Close()
 		}()