massive refactoring for kcp

transport/internet/tcp_hub.go

@@ -0,0 +1,77 @@
+package internet
+
+import (
+	"errors"
+	"net"
+	"sync"
+
+	"github.com/v2ray/v2ray-core/common/log"
+	v2net "github.com/v2ray/v2ray-core/common/net"
+)
+
+var (
+	ErrorClosedConnection = errors.New("Connection already closed.")
+
+	KCPListenFunc    ListenFunc
+	TCPListenFunc    ListenFunc
+	RawTCPListenFunc ListenFunc
+)
+
+type ListenFunc func(address v2net.Address, port v2net.Port) (Listener, error)
+type Listener interface {
+	Accept() (Connection, error)
+	Close() error
+	Addr() net.Addr
+}
+
+type TCPHub struct {
+	sync.Mutex
+	listener     Listener
+	connCallback ConnectionHandler
+	accepting    bool
+}
+
+func ListenTCP(address v2net.Address, port v2net.Port, callback ConnectionHandler, settings *StreamSettings) (*TCPHub, error) {
+	var listener Listener
+	var err error
+	if settings.IsCapableOf(StreamConnectionTypeKCP) {
+		listener, err = KCPListenFunc(address, port)
+	} else if settings.IsCapableOf(StreamConnectionTypeTCP) {
+		listener, err = TCPListenFunc(address, port)
+	} else {
+		listener, err = RawTCPListenFunc(address, port)
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	hub := &TCPHub{
+		listener:     listener,
+		connCallback: callback,
+	}
+
+	go hub.start()
+	return hub, nil
+}
+
+func (this *TCPHub) Close() {
+	this.accepting = false
+	this.listener.Close()
+}
+
+func (this *TCPHub) start() {
+	this.accepting = true
+	for this.accepting {
+		conn, err := this.listener.Accept()
+
+		if err != nil {
+			if this.accepting {
+				log.Warning("Listener: Failed to accept new TCP connection: ", err)
+			}
+			continue
+		}
+		log.Info("Handling connection from ", conn.RemoteAddr())
+		go this.connCallback(conn)
+	}
+}