Merged latest master

transport/config.go

@@ -2,12 +2,14 @@ package transport
 
 import "github.com/v2ray/v2ray-core/transport/hub/kcpv"
 
+// Config for V2Ray transport layer.
 type Config struct {
 	ConnectionReuse bool
 	enableKcp       bool
 	kcpConfig       *kcpv.Config
 }
 
+// Apply applies this Config.
 func (this *Config) Apply() error {
 	if this.ConnectionReuse {
 		connectionReuse = true

transport/hub/connection.go

@@ -1,12 +1,18 @@
 package hub
 
 import (
+	"errors"
 	"net"
+	"reflect"
 	"time"
 
 	"github.com/v2ray/v2ray-core/transport"
 )
 
+var (
+	ErrInvalidConn = errors.New("Invalid Connection.")
+)
+
 type ConnectionHandler func(*Connection)
 
 type ConnectionManager interface {
@@ -73,3 +79,17 @@ func (this *Connection) SetReusable(reusable bool) {
 func (this *Connection) Reusable() bool {
 	return this.reusable
 }
+
+func (this *Connection) SysFd() (int, error) {
+	cv := reflect.ValueOf(this.conn)
+	switch ce := cv.Elem(); ce.Kind() {
+	case reflect.Struct:
+		netfd := ce.FieldByName("conn").FieldByName("fd")
+		switch fe := netfd.Elem(); fe.Kind() {
+		case reflect.Struct:
+			fd := fe.FieldByName("sysfd")
+			return int(fd.Int()), nil
+		}
+	}
+	return 0, ErrInvalidConn
+}

transport/transport.go

@@ -8,6 +8,7 @@ var (
 	KcpConfig       *kcpv.Config
 )
 
+// IsConnectionReusable returns true if V2Ray is trying to reuse TCP connections.
 func IsConnectionReusable() bool {
 	return connectionReuse
 }