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89 lines
1.5 KiB
89 lines
1.5 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 Writer 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 NewWriter(id uint16, dest net.Destination, writer buf.Writer) *Writer {
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return &Writer{
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id: id,
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dest: dest,
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writer: writer,
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followup: false,
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}
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}
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func NewResponseWriter(id uint16, writer buf.Writer) *Writer {
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return &Writer{
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id: id,
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writer: writer,
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followup: true,
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}
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}
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func (w *Writer) writeInternal(mb buf.MultiBuffer) 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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hasData := !mb.IsEmpty()
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if hasData {
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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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mb2 := buf.NewMultiBuffer()
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mb2.Append(frame)
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if hasData {
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frame.AppendSupplier(serial.WriteUint16(uint16(mb.Len())))
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mb2.AppendMulti(mb)
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}
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return w.writer.Write(mb2)
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}
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func (w *Writer) Write(mb buf.MultiBuffer) error {
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const chunkSize = 8 * 1024
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for {
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slice := mb.SliceBySize(chunkSize)
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if err := w.writeInternal(slice); err != nil {
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return err
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}
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if mb.IsEmpty() {
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break
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}
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}
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return nil
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}
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func (w *Writer) Close() {
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meta := FrameMetadata{
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SessionID: w.id,
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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(buf.NewMultiBufferValue(frame))
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}
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