add mtls dialer

cmd/gost/register.go

@@ -21,6 +21,8 @@ import (
 	_ "github.com/go-gost/gost/pkg/dialer/obfs/tls"
 	_ "github.com/go-gost/gost/pkg/dialer/quic"
 	_ "github.com/go-gost/gost/pkg/dialer/tcp"
+	_ "github.com/go-gost/gost/pkg/dialer/tls"
+	_ "github.com/go-gost/gost/pkg/dialer/tls/mux"
 	_ "github.com/go-gost/gost/pkg/dialer/udp"
 
 	// Register handlers

go.mod

@@ -44,7 +44,7 @@ require (
 	github.com/templexxx/xorsimd v0.4.1 // indirect
 	github.com/tjfoc/gmsm v1.3.2 // indirect
 	github.com/xtaci/kcp-go/v5 v5.6.1
-	github.com/xtaci/smux v1.5.15
+	github.com/xtaci/smux v1.5.16
 	github.com/xtaci/tcpraw v1.2.25
 	golang.org/x/crypto v0.0.0-20210817164053-32db794688a5
 	golang.org/x/mod v0.4.2 // indirect

go.sum

@@ -399,6 +399,8 @@ github.com/xtaci/lossyconn v0.0.0-20190602105132-8df528c0c9ae h1:J0GxkO96kL4WF+A
 github.com/xtaci/lossyconn v0.0.0-20190602105132-8df528c0c9ae/go.mod h1:gXtu8J62kEgmN++bm9BVICuT/e8yiLI2KFobd/TRFsE=
 github.com/xtaci/smux v1.5.15 h1:6hMiXswcleXj5oNfcJc+DXS8Vj36XX2LaX98udog6Kc=
 github.com/xtaci/smux v1.5.15/go.mod h1:OMlQbT5vcgl2gb49mFkYo6SMf+zP3rcjcwQz7ZU7IGY=
+github.com/xtaci/smux v1.5.16 h1:FBPYOkW8ZTjLKUM4LI4xnnuuDC8CQ/dB04HD519WoEk=
+github.com/xtaci/smux v1.5.16/go.mod h1:OMlQbT5vcgl2gb49mFkYo6SMf+zP3rcjcwQz7ZU7IGY=
 github.com/xtaci/tcpraw v1.2.25 h1:VDlqo0op17JeXBM6e2G9ocCNLOJcw9mZbobMbJjo0vk=
 github.com/xtaci/tcpraw v1.2.25/go.mod h1:dKyZ2V75s0cZ7cbgJYdxPvms7af0joIeOyx1GgJQbLk=
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=

pkg/chain/chain.go

@@ -31,7 +31,7 @@ func (c *Chain) GetRouteFor(network, address string) (r *Route) {
 			break
 		}
 
-		if node.transport.IsMultiplex() {
+		if node.transport.Multiplex() {
 			tr := node.transport.Copy().
 				WithRoute(r)
 			node = node.Copy().

pkg/chain/transport.go

@@ -75,9 +75,9 @@ func (tr *Transport) Bind(ctx context.Context, conn net.Conn, network, address s
 	return nil, connector.ErrBindUnsupported
 }
 
-func (tr *Transport) IsMultiplex() bool {
+func (tr *Transport) Multiplex() bool {
 	if mux, ok := tr.dialer.(dialer.Multiplexer); ok {
-		return mux.IsMultiplex()
+		return mux.Multiplex()
 	}
 	return false
 }

pkg/dialer/dialer.go

@@ -18,5 +18,5 @@ type Handshaker interface {
 }
 
 type Multiplexer interface {
-	IsMultiplex() bool
+	Multiplex() bool
 }

pkg/dialer/http2/dialer.go

@@ -45,8 +45,8 @@ func (d *http2Dialer) Init(md md.Metadata) (err error) {
 	return nil
 }
 
-// IsMultiplex implements dialer.Multiplexer interface.
+// Multiplex implements dialer.Multiplexer interface.
-func (d *http2Dialer) IsMultiplex() bool {
+func (d *http2Dialer) Multiplex() bool {
 	return true
 }
 

pkg/dialer/http2/h2/dialer.go

@@ -65,8 +65,8 @@ func (d *h2Dialer) Init(md md.Metadata) (err error) {
 	return nil
 }
 
-// IsMultiplex implements dialer.Multiplexer interface.
+// Multiplex implements dialer.Multiplexer interface.
-func (d *h2Dialer) IsMultiplex() bool {
+func (d *h2Dialer) Multiplex() bool {
 	return true
 }
 

pkg/dialer/kcp/dialer.go

@@ -50,8 +50,8 @@ func (d *kcpDialer) Init(md md.Metadata) (err error) {
 	return nil
 }
 
-// IsMultiplex implements dialer.Multiplexer interface.
+// Multiplex implements dialer.Multiplexer interface.
-func (d *kcpDialer) IsMultiplex() bool {
+func (d *kcpDialer) Multiplex() bool {
 	return true
 }
 
@@ -103,7 +103,6 @@ func (d *kcpDialer) Handshake(ctx context.Context, conn net.Conn, options ...dia
 	for _, option := range options {
 		option(opts)
 	}
-	config := d.md.config
 
 	d.sessionMutex.Lock()
 	defer d.sessionMutex.Unlock()
@@ -120,7 +119,7 @@ func (d *kcpDialer) Handshake(ctx context.Context, conn net.Conn, options ...dia
 	}
 
 	if !ok || session.session == nil {
-		s, err := d.initSession(opts.Addr, conn, config)
+		s, err := d.initSession(ctx, opts.Addr, conn)
 		if err != nil {
 			d.logger.Error(err)
 			conn.Close()
@@ -140,12 +139,14 @@ func (d *kcpDialer) Handshake(ctx context.Context, conn net.Conn, options ...dia
 	return cc, nil
 }
 
-func (d *kcpDialer) initSession(addr string, conn net.Conn, config *kcp_util.Config) (*muxSession, error) {
+func (d *kcpDialer) initSession(ctx context.Context, addr string, conn net.Conn) (*muxSession, error) {
 	pc, ok := conn.(net.PacketConn)
 	if !ok {
 		return nil, errors.New("kcp: wrong connection type")
 	}
 
+	config := d.md.config
+
 	kcpconn, err := kcp.NewConn(addr,
 		kcp_util.BlockCrypt(config.Key, config.Crypt, kcp_util.DefaultSalt),
 		config.DataShard, config.ParityShard, pc)

pkg/dialer/quic/dialer.go

@@ -46,8 +46,8 @@ func (d *quicDialer) Init(md md.Metadata) (err error) {
 	return nil
 }
 
-// IsMultiplex implements dialer.Multiplexer interface.
+// Multiplex implements dialer.Multiplexer interface.
-func (d *quicDialer) IsMultiplex() bool {
+func (d *quicDialer) Multiplex() bool {
 	return true
 }
 

pkg/dialer/tls/dialer.go

@@ -0,0 +1,67 @@
+package tls
+
+import (
+	"context"
+	"crypto/tls"
+	"net"
+	"time"
+
+	"github.com/go-gost/gost/pkg/dialer"
+	"github.com/go-gost/gost/pkg/logger"
+	md "github.com/go-gost/gost/pkg/metadata"
+	"github.com/go-gost/gost/pkg/registry"
+)
+
+func init() {
+	registry.RegisterDialer("tls", NewDialer)
+}
+
+type tlsDialer struct {
+	md     metadata
+	logger logger.Logger
+}
+
+func NewDialer(opts ...dialer.Option) dialer.Dialer {
+	options := &dialer.Options{}
+	for _, opt := range opts {
+		opt(options)
+	}
+
+	return &tlsDialer{
+		logger: options.Logger,
+	}
+}
+
+func (d *tlsDialer) Init(md md.Metadata) (err error) {
+	return d.parseMetadata(md)
+}
+
+func (d *tlsDialer) Dial(ctx context.Context, addr string, opts ...dialer.DialOption) (net.Conn, error) {
+	var options dialer.DialOptions
+	for _, opt := range opts {
+		opt(&options)
+	}
+
+	var netd net.Dialer
+	conn, err := netd.DialContext(ctx, "tcp", addr)
+	if err != nil {
+		d.logger.Error(err)
+	}
+	return conn, err
+}
+
+// Handshake implements dialer.Handshaker
+func (d *tlsDialer) Handshake(ctx context.Context, conn net.Conn, options ...dialer.HandshakeOption) (net.Conn, error) {
+	if d.md.handshakeTimeout > 0 {
+		conn.SetDeadline(time.Now().Add(d.md.handshakeTimeout))
+		defer conn.SetDeadline(time.Time{})
+	}
+
+	tlsConn := tls.Client(conn, d.md.tlsConfig)
+	if err := tlsConn.HandshakeContext(ctx); err != nil {
+		conn.Close()
+		return nil, err
+	}
+
+	return tlsConn, nil
+}

pkg/dialer/tls/metadata.go

@@ -0,0 +1,43 @@
+package tls
+
+import (
+	"crypto/tls"
+	"net"
+	"time"
+
+	tls_util "github.com/go-gost/gost/pkg/common/util/tls"
+	md "github.com/go-gost/gost/pkg/metadata"
+)
+
+type metadata struct {
+	tlsConfig        *tls.Config
+	handshakeTimeout time.Duration
+}
+
+func (d *tlsDialer) parseMetadata(md md.Metadata) (err error) {
+	const (
+		certFile   = "certFile"
+		keyFile    = "keyFile"
+		caFile     = "caFile"
+		secure     = "secure"
+		serverName = "serverName"
+
+		handshakeTimeout = "handshakeTimeout"
+	)
+
+	sn, _, _ := net.SplitHostPort(md.GetString(serverName))
+	if sn == "" {
+		sn = "localhost"
+	}
+	d.md.tlsConfig, err = tls_util.LoadClientConfig(
+		md.GetString(certFile),
+		md.GetString(keyFile),
+		md.GetString(caFile),
+		md.GetBool(secure),
+		sn,
+	)
+
+	d.md.handshakeTimeout = md.GetDuration(handshakeTimeout)
+
+	return
+}

pkg/dialer/tls/mux/conn.go

@@ -0,0 +1,38 @@
+package mux
+
+import (
+	"net"
+
+	"github.com/xtaci/smux"
+)
+
+type muxSession struct {
+	conn    net.Conn
+	session *smux.Session
+}
+
+func (session *muxSession) GetConn() (net.Conn, error) {
+	return session.session.OpenStream()
+}
+
+func (session *muxSession) Accept() (net.Conn, error) {
+	return session.session.AcceptStream()
+}
+
+func (session *muxSession) Close() error {
+	if session.session == nil {
+		return nil
+	}
+	return session.session.Close()
+}
+
+func (session *muxSession) IsClosed() bool {
+	if session.session == nil {
+		return true
+	}
+	return session.session.IsClosed()
+}
+
+func (session *muxSession) NumStreams() int {
+	return session.session.NumStreams()
+}

pkg/dialer/tls/mux/dialer.go

@@ -0,0 +1,182 @@
+package mux
+
+import (
+	"context"
+	"crypto/tls"
+	"errors"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/go-gost/gost/pkg/dialer"
+	"github.com/go-gost/gost/pkg/logger"
+	md "github.com/go-gost/gost/pkg/metadata"
+	"github.com/go-gost/gost/pkg/registry"
+	"github.com/xtaci/smux"
+)
+
+func init() {
+	registry.RegisterDialer("mtls", NewDialer)
+}
+
+type mtlsDialer struct {
+	sessions     map[string]*muxSession
+	sessionMutex sync.Mutex
+	logger       logger.Logger
+	md           metadata
+}
+
+func NewDialer(opts ...dialer.Option) dialer.Dialer {
+	options := &dialer.Options{}
+	for _, opt := range opts {
+		opt(options)
+	}
+
+	return &mtlsDialer{
+		sessions: make(map[string]*muxSession),
+		logger:   options.Logger,
+	}
+}
+
+func (d *mtlsDialer) Init(md md.Metadata) (err error) {
+	if err = d.parseMetadata(md); err != nil {
+		return
+	}
+
+	return nil
+}
+
+// Multiplex implements dialer.Multiplexer interface.
+func (d *mtlsDialer) Multiplex() bool {
+	return true
+}
+
+func (d *mtlsDialer) Dial(ctx context.Context, addr string, opts ...dialer.DialOption) (conn net.Conn, err error) {
+	var options dialer.DialOptions
+	for _, opt := range opts {
+		opt(&options)
+	}
+
+	d.sessionMutex.Lock()
+	defer d.sessionMutex.Unlock()
+
+	session, ok := d.sessions[addr]
+	if session != nil && session.IsClosed() {
+		delete(d.sessions, addr) // session is dead
+		ok = false
+	}
+	if !ok {
+		conn, err = d.dial(ctx, "tcp", addr, &options)
+		if err != nil {
+			return
+		}
+
+		session = &muxSession{conn: conn}
+		d.sessions[addr] = session
+	}
+
+	return session.conn, err
+}
+
+// Handshake implements dialer.Handshaker
+func (d *mtlsDialer) Handshake(ctx context.Context, conn net.Conn, options ...dialer.HandshakeOption) (net.Conn, error) {
+	opts := &dialer.HandshakeOptions{}
+	for _, option := range options {
+		option(opts)
+	}
+
+	d.sessionMutex.Lock()
+	defer d.sessionMutex.Unlock()
+
+	if d.md.handshakeTimeout > 0 {
+		conn.SetDeadline(time.Now().Add(d.md.handshakeTimeout))
+		defer conn.SetDeadline(time.Time{})
+	}
+
+	session, ok := d.sessions[opts.Addr]
+	if session != nil && session.conn != conn {
+		conn.Close()
+		return nil, errors.New("mtls: unrecognized connection")
+	}
+
+	if !ok || session.session == nil {
+		s, err := d.initSession(ctx, conn)
+		if err != nil {
+			d.logger.Error(err)
+			conn.Close()
+			delete(d.sessions, opts.Addr)
+			return nil, err
+		}
+		session = s
+		d.sessions[opts.Addr] = session
+	}
+	cc, err := session.GetConn()
+	if err != nil {
+		session.Close()
+		delete(d.sessions, opts.Addr)
+		return nil, err
+	}
+
+	return cc, nil
+}
+
+func (d *mtlsDialer) dial(ctx context.Context, network, addr string, opts *dialer.DialOptions) (net.Conn, error) {
+	dial := opts.DialFunc
+	if dial != nil {
+		conn, err := dial(ctx, addr)
+		if err != nil {
+			d.logger.Error(err)
+		} else {
+			d.logger.WithFields(map[string]interface{}{
+				"src": conn.LocalAddr().String(),
+				"dst": addr,
+			}).Debug("dial with dial func")
+		}
+		return conn, err
+	}
+
+	var netd net.Dialer
+	conn, err := netd.DialContext(ctx, network, addr)
+	if err != nil {
+		d.logger.Error(err)
+	} else {
+		d.logger.WithFields(map[string]interface{}{
+			"src": conn.LocalAddr().String(),
+			"dst": addr,
+		}).Debugf("dial direct %s/%s", addr, network)
+	}
+	return conn, err
+}
+
+func (d *mtlsDialer) initSession(ctx context.Context, conn net.Conn) (*muxSession, error) {
+	tlsConn := tls.Client(conn, d.md.tlsConfig)
+	if err := tlsConn.HandshakeContext(ctx); err != nil {
+		return nil, err
+	}
+	conn = tlsConn
+
+	// stream multiplex
+	smuxConfig := smux.DefaultConfig()
+	smuxConfig.KeepAliveDisabled = d.md.muxKeepAliveDisabled
+	if d.md.muxKeepAliveInterval > 0 {
+		smuxConfig.KeepAliveInterval = d.md.muxKeepAliveInterval
+	}
+	if d.md.muxKeepAliveTimeout > 0 {
+		smuxConfig.KeepAliveTimeout = d.md.muxKeepAliveTimeout
+	}
+	if d.md.muxMaxFrameSize > 0 {
+		smuxConfig.MaxFrameSize = d.md.muxMaxFrameSize
+	}
+	if d.md.muxMaxReceiveBuffer > 0 {
+		smuxConfig.MaxReceiveBuffer = d.md.muxMaxReceiveBuffer
+	}
+	if d.md.muxMaxStreamBuffer > 0 {
+		smuxConfig.MaxStreamBuffer = d.md.muxMaxStreamBuffer
+	}
+
+	session, err := smux.Client(conn, smuxConfig)
+	if err != nil {
+		return nil, err
+	}
+	return &muxSession{conn: conn, session: session}, nil
+}

pkg/dialer/tls/mux/metadata.go

@@ -0,0 +1,63 @@
+package mux
+
+import (
+	"crypto/tls"
+	"net"
+	"time"
+
+	tls_util "github.com/go-gost/gost/pkg/common/util/tls"
+	md "github.com/go-gost/gost/pkg/metadata"
+)
+
+type metadata struct {
+	tlsConfig        *tls.Config
+	handshakeTimeout time.Duration
+
+	muxKeepAliveDisabled bool
+	muxKeepAliveInterval time.Duration
+	muxKeepAliveTimeout  time.Duration
+	muxMaxFrameSize      int
+	muxMaxReceiveBuffer  int
+	muxMaxStreamBuffer   int
+}
+
+func (d *mtlsDialer) parseMetadata(md md.Metadata) (err error) {
+	const (
+		certFile   = "certFile"
+		keyFile    = "keyFile"
+		caFile     = "caFile"
+		secure     = "secure"
+		serverName = "serverName"
+
+		handshakeTimeout = "handshakeTimeout"
+
+		muxKeepAliveDisabled = "muxKeepAliveDisabled"
+		muxKeepAliveInterval = "muxKeepAliveInterval"
+		muxKeepAliveTimeout  = "muxKeepAliveTimeout"
+		muxMaxFrameSize      = "muxMaxFrameSize"
+		muxMaxReceiveBuffer  = "muxMaxReceiveBuffer"
+		muxMaxStreamBuffer   = "muxMaxStreamBuffer"
+	)
+
+	sn, _, _ := net.SplitHostPort(md.GetString(serverName))
+	if sn == "" {
+		sn = "localhost"
+	}
+	d.md.tlsConfig, err = tls_util.LoadClientConfig(
+		md.GetString(certFile),
+		md.GetString(keyFile),
+		md.GetString(caFile),
+		md.GetBool(secure),
+		sn,
+	)
+	d.md.handshakeTimeout = md.GetDuration(handshakeTimeout)
+
+	d.md.muxKeepAliveDisabled = md.GetBool(muxKeepAliveDisabled)
+	d.md.muxKeepAliveInterval = md.GetDuration(muxKeepAliveInterval)
+	d.md.muxKeepAliveTimeout = md.GetDuration(muxKeepAliveTimeout)
+	d.md.muxMaxFrameSize = md.GetInt(muxMaxFrameSize)
+	d.md.muxMaxReceiveBuffer = md.GetInt(muxMaxReceiveBuffer)
+	d.md.muxMaxStreamBuffer = md.GetInt(muxMaxStreamBuffer)
+
+	return
+}

pkg/dialer/udp/dialer.go

@@ -48,7 +48,3 @@ func (d *udpDialer) Dial(ctx context.Context, addr string, opts ...dialer.DialOp
 		UDPConn: c,
 	}, nil
 }
-
-func (d *udpDialer) parseMetadata(md md.Metadata) (err error) {
-	return
-}

pkg/dialer/udp/metadata.go

@@ -1,6 +1,10 @@
 package udp
 
-import "time"
+import (
+	"time"
+
+	md "github.com/go-gost/gost/pkg/metadata"
+)
 
 const (
 	dialTimeout = "dialTimeout"
@@ -13,3 +17,7 @@ const (
 type metadata struct {
 	dialTimeout time.Duration
 }
+
+func (d *udpDialer) parseMetadata(md md.Metadata) (err error) {
+	return
+}

pkg/listener/tls/listener.go

@@ -4,7 +4,6 @@ import (
 	"crypto/tls"
 	"net"
 
-	"github.com/go-gost/gost/pkg/common/util"
 	"github.com/go-gost/gost/pkg/listener"
 	"github.com/go-gost/gost/pkg/logger"
 	md "github.com/go-gost/gost/pkg/metadata"
@@ -17,9 +16,9 @@ func init() {
 
 type tlsListener struct {
 	addr string
-	md   metadata
 	net.Listener
 	logger logger.Logger
+	md     metadata
 }
 
 func NewListener(opts ...listener.Option) listener.Listener {
@@ -43,14 +42,7 @@ func (l *tlsListener) Init(md md.Metadata) (err error) {
 		return
 	}
 
-	ln = tls.NewListener(
+	l.Listener = tls.NewListener(ln, l.md.tlsConfig)
-		&util.TCPKeepAliveListener{
-			TCPListener:     ln.(*net.TCPListener),
-			KeepAlivePeriod: l.md.keepAlivePeriod,
-		},
-		l.md.tlsConfig,
-	)
 
-	l.Listener = ln
 	return
 }

pkg/listener/tls/metadata.go

@@ -2,7 +2,6 @@ package tls
 
 import (
 	"crypto/tls"
-	"time"
 
 	tls_util "github.com/go-gost/gost/pkg/common/util/tls"
 	md "github.com/go-gost/gost/pkg/metadata"
@@ -10,7 +9,6 @@ import (
 
 type metadata struct {
 	tlsConfig *tls.Config
-	keepAlivePeriod time.Duration
 }
 
 func (l *tlsListener) parseMetadata(md md.Metadata) (err error) {
@@ -18,7 +16,6 @@ func (l *tlsListener) parseMetadata(md md.Metadata) (err error) {
 		certFile = "certFile"
 		keyFile  = "keyFile"
 		caFile   = "caFile"
-		keepAlivePeriod = "keepAlivePeriod"
 	)
 
 	l.md.tlsConfig, err = tls_util.LoadServerConfig(
@@ -30,6 +27,5 @@ func (l *tlsListener) parseMetadata(md md.Metadata) (err error) {
 		return
 	}
 
-	l.md.keepAlivePeriod = md.GetDuration(keepAlivePeriod)
 	return
 }

pkg/listener/tls/mux/listener.go

@@ -17,11 +17,11 @@ func init() {
 
 type mtlsListener struct {
 	addr string
-	md   metadata
 	net.Listener
-	connChan chan net.Conn
+	cqueue  chan net.Conn
 	errChan chan error
 	logger  logger.Logger
+	md      metadata
 }
 
 func NewListener(opts ...listener.Option) listener.Listener {
@@ -46,11 +46,7 @@ func (l *mtlsListener) Init(md md.Metadata) (err error) {
 	}
 	l.Listener = tls.NewListener(ln, l.md.tlsConfig)
 
-	queueSize := l.md.connQueueSize
+	l.cqueue = make(chan net.Conn, l.md.backlog)
-	if queueSize <= 0 {
-		queueSize = defaultQueueSize
-	}
-	l.connChan = make(chan net.Conn, queueSize)
 	l.errChan = make(chan error, 1)
 
 	go l.listenLoop()
@@ -73,8 +69,8 @@ func (l *mtlsListener) listenLoop() {
 func (l *mtlsListener) mux(conn net.Conn) {
 	smuxConfig := smux.DefaultConfig()
 	smuxConfig.KeepAliveDisabled = l.md.muxKeepAliveDisabled
-	if l.md.muxKeepAlivePeriod > 0 {
+	if l.md.muxKeepAliveInterval > 0 {
-		smuxConfig.KeepAliveInterval = l.md.muxKeepAlivePeriod
+		smuxConfig.KeepAliveInterval = l.md.muxKeepAliveInterval
 	}
 	if l.md.muxKeepAliveTimeout > 0 {
 		smuxConfig.KeepAliveTimeout = l.md.muxKeepAliveTimeout
@@ -103,12 +99,12 @@ func (l *mtlsListener) mux(conn net.Conn) {
 		}
 
 		select {
-		case l.connChan <- stream:
+		case l.cqueue <- stream:
 		case <-stream.GetDieCh():
 			stream.Close()
 		default:
 			stream.Close()
-			l.logger.Error("connection queue is full")
+			l.logger.Warnf("connection queue is full, client %s discarded", stream.RemoteAddr())
 		}
 	}
 }
@@ -116,7 +112,7 @@ func (l *mtlsListener) mux(conn net.Conn) {
 func (l *mtlsListener) Accept() (conn net.Conn, err error) {
 	var ok bool
 	select {
-	case conn = <-l.connChan:
+	case conn = <-l.cqueue:
 	case err, ok = <-l.errChan:
 		if !ok {
 			err = listener.ErrClosed

pkg/listener/tls/mux/metadata.go

@@ -9,20 +9,20 @@ import (
 )
 
 const (
-	defaultQueueSize = 128
+	defaultBacklog = 128
 )
 
 type metadata struct {
 	tlsConfig *tls.Config
 
 	muxKeepAliveDisabled bool
-	muxKeepAlivePeriod   time.Duration
+	muxKeepAliveInterval time.Duration
 	muxKeepAliveTimeout  time.Duration
 	muxMaxFrameSize      int
 	muxMaxReceiveBuffer  int
 	muxMaxStreamBuffer   int
 
-	connQueueSize int
+	backlog int
 }
 
 func (l *mtlsListener) parseMetadata(md md.Metadata) (err error) {
@@ -31,8 +31,10 @@ func (l *mtlsListener) parseMetadata(md md.Metadata) (err error) {
 		keyFile  = "keyFile"
 		caFile   = "caFile"
 
+		backlog = "backlog"
+
 		muxKeepAliveDisabled = "muxKeepAliveDisabled"
-		muxKeepAlivePeriod   = "muxKeepAlivePeriod"
+		muxKeepAliveInterval = "muxKeepAliveInterval"
 		muxKeepAliveTimeout  = "muxKeepAliveTimeout"
 		muxMaxFrameSize      = "muxMaxFrameSize"
 		muxMaxReceiveBuffer  = "muxMaxReceiveBuffer"
@@ -48,5 +50,17 @@ func (l *mtlsListener) parseMetadata(md md.Metadata) (err error) {
 		return
 	}
 
+	l.md.backlog = md.GetInt(backlog)
+	if l.md.backlog <= 0 {
+		l.md.backlog = defaultBacklog
+	}
+
+	l.md.muxKeepAliveDisabled = md.GetBool(muxKeepAliveDisabled)
+	l.md.muxKeepAliveInterval = md.GetDuration(muxKeepAliveInterval)
+	l.md.muxKeepAliveTimeout = md.GetDuration(muxKeepAliveTimeout)
+	l.md.muxMaxFrameSize = md.GetInt(muxMaxFrameSize)
+	l.md.muxMaxReceiveBuffer = md.GetInt(muxMaxReceiveBuffer)
+	l.md.muxMaxStreamBuffer = md.GetInt(muxMaxStreamBuffer)
+
 	return
 }