feat: support tuicV5

transport/tuic/v4/packet.go

@@ -0,0 +1,177 @@
+package v4
+
+import (
+	"net"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/metacubex/quic-go"
+
+	N "github.com/Dreamacro/clash/common/net"
+	"github.com/Dreamacro/clash/common/pool"
+)
+
+type quicStreamPacketConn struct {
+	connId    uint32
+	quicConn  quic.Connection
+	inputConn *N.BufferedConn
+
+	udpRelayMode          string
+	maxUdpRelayPacketSize int
+
+	deferQuicConnFn func(quicConn quic.Connection, err error)
+	closeDeferFn    func()
+	writeClosed     *atomic.Bool
+
+	closeOnce sync.Once
+	closeErr  error
+	closed    bool
+}
+
+func (q *quicStreamPacketConn) Close() error {
+	q.closeOnce.Do(func() {
+		q.closed = true
+		q.closeErr = q.close()
+	})
+	return q.closeErr
+}
+
+func (q *quicStreamPacketConn) close() (err error) {
+	if q.closeDeferFn != nil {
+		defer q.closeDeferFn()
+	}
+	if q.deferQuicConnFn != nil {
+		defer func() {
+			q.deferQuicConnFn(q.quicConn, err)
+		}()
+	}
+	if q.inputConn != nil {
+		_ = q.inputConn.Close()
+		q.inputConn = nil
+
+		buf := pool.GetBuffer()
+		defer pool.PutBuffer(buf)
+		err = NewDissociate(q.connId).WriteTo(buf)
+		if err != nil {
+			return
+		}
+		var stream quic.SendStream
+		stream, err = q.quicConn.OpenUniStream()
+		if err != nil {
+			return
+		}
+		_, err = buf.WriteTo(stream)
+		if err != nil {
+			return
+		}
+		err = stream.Close()
+		if err != nil {
+			return
+		}
+	}
+	return
+}
+
+func (q *quicStreamPacketConn) SetDeadline(t time.Time) error {
+	//TODO implement me
+	return nil
+}
+
+func (q *quicStreamPacketConn) SetReadDeadline(t time.Time) error {
+	if q.inputConn != nil {
+		return q.inputConn.SetReadDeadline(t)
+	}
+	return nil
+}
+
+func (q *quicStreamPacketConn) SetWriteDeadline(t time.Time) error {
+	//TODO implement me
+	return nil
+}
+
+func (q *quicStreamPacketConn) ReadFrom(p []byte) (n int, addr net.Addr, err error) {
+	if q.inputConn != nil {
+		var packet Packet
+		packet, err = ReadPacket(q.inputConn)
+		if err != nil {
+			return
+		}
+		n = copy(p, packet.DATA)
+		addr = packet.ADDR.UDPAddr()
+	} else {
+		err = net.ErrClosed
+	}
+	return
+}
+
+func (q *quicStreamPacketConn) WaitReadFrom() (data []byte, put func(), addr net.Addr, err error) {
+	if q.inputConn != nil {
+		var packet Packet
+		packet, err = ReadPacket(q.inputConn)
+		if err != nil {
+			return
+		}
+		data = packet.DATA
+		addr = packet.ADDR.UDPAddr()
+	} else {
+		err = net.ErrClosed
+	}
+	return
+}
+
+func (q *quicStreamPacketConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
+	if q.udpRelayMode != "quic" && len(p) > q.maxUdpRelayPacketSize {
+		return 0, quic.ErrMessageTooLarge(q.maxUdpRelayPacketSize)
+	}
+	if q.closed {
+		return 0, net.ErrClosed
+	}
+	if q.writeClosed != nil && q.writeClosed.Load() {
+		_ = q.Close()
+		return 0, net.ErrClosed
+	}
+	if q.deferQuicConnFn != nil {
+		defer func() {
+			q.deferQuicConnFn(q.quicConn, err)
+		}()
+	}
+	buf := pool.GetBuffer()
+	defer pool.PutBuffer(buf)
+	address, err := NewAddressNetAddr(addr)
+	if err != nil {
+		return
+	}
+	err = NewPacket(q.connId, uint16(len(p)), address, p).WriteTo(buf)
+	if err != nil {
+		return
+	}
+	switch q.udpRelayMode {
+	case "quic":
+		var stream quic.SendStream
+		stream, err = q.quicConn.OpenUniStream()
+		if err != nil {
+			return
+		}
+		defer stream.Close()
+		_, err = buf.WriteTo(stream)
+		if err != nil {
+			return
+		}
+	default: // native
+		data := buf.Bytes()
+		err = q.quicConn.SendMessage(data)
+		if err != nil {
+			return
+		}
+	}
+	n = len(p)
+
+	return
+}
+
+func (q *quicStreamPacketConn) LocalAddr() net.Addr {
+	return q.quicConn.LocalAddr()
+}
+
+var _ net.PacketConn = (*quicStreamPacketConn)(nil)