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78 lines
1.3 KiB
78 lines
1.3 KiB
package mux
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import (
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"v2ray.com/core/common/buf"
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"v2ray.com/core/common/net"
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"v2ray.com/core/common/serial"
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)
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type muxWriter struct {
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id uint16
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dest net.Destination
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writer buf.Writer
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followup bool
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}
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func (w *muxWriter) writeInternal(b *buf.Buffer) error {
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meta := FrameMetadata{
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SessionID: w.id,
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Target: w.dest,
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}
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if w.followup {
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meta.SessionStatus = SessionStatusKeep
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} else {
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w.followup = true
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meta.SessionStatus = SessionStatusNew
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}
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if b.Len() > 0 {
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meta.Option.Add(OptionData)
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}
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frame := buf.New()
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frame.AppendSupplier(meta.AsSupplier())
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if b.Len() > 0 {
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frame.AppendSupplier(serial.WriteUint16(0))
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lengthBytes := frame.BytesFrom(-2)
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nBytes, err := frame.Write(b.Bytes())
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if err != nil {
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frame.Release()
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return err
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}
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serial.Uint16ToBytes(uint16(nBytes), lengthBytes[:0])
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b.SliceFrom(nBytes)
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}
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return w.writer.Write(frame)
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}
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func (w *muxWriter) Write(b *buf.Buffer) error {
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defer b.Release()
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if err := w.writeInternal(b); err != nil {
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return err
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}
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for !b.IsEmpty() {
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if err := w.writeInternal(b); err != nil {
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return err
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}
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}
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return nil
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}
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func (w *muxWriter) Close() {
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meta := FrameMetadata{
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SessionID: w.id,
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Target: w.dest,
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SessionStatus: SessionStatusEnd,
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}
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frame := buf.New()
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frame.AppendSupplier(meta.AsSupplier())
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w.writer.Write(frame)
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}
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