mirror of https://github.com/v2ray/v2ray-core
93 lines
1.6 KiB
Go
93 lines
1.6 KiB
Go
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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}
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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(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 *Writer) 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 *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(frame)
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}
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