mirror of https://github.com/v2ray/v2ray-core
107 lines
2.0 KiB
Go
107 lines
2.0 KiB
Go
package mux
|
|
|
|
import (
|
|
"runtime"
|
|
|
|
"v2ray.com/core/common/buf"
|
|
"v2ray.com/core/common/net"
|
|
"v2ray.com/core/common/serial"
|
|
)
|
|
|
|
type Writer struct {
|
|
id uint16
|
|
dest net.Destination
|
|
writer buf.Writer
|
|
followup bool
|
|
}
|
|
|
|
func NewWriter(id uint16, dest net.Destination, writer buf.Writer) *Writer {
|
|
return &Writer{
|
|
id: id,
|
|
dest: dest,
|
|
writer: writer,
|
|
followup: false,
|
|
}
|
|
}
|
|
|
|
func NewResponseWriter(id uint16, writer buf.Writer) *Writer {
|
|
return &Writer{
|
|
id: id,
|
|
writer: writer,
|
|
followup: true,
|
|
}
|
|
}
|
|
|
|
func (w *Writer) getNextFrameMeta() FrameMetadata {
|
|
meta := FrameMetadata{
|
|
SessionID: w.id,
|
|
Target: w.dest,
|
|
}
|
|
if w.followup {
|
|
meta.SessionStatus = SessionStatusKeep
|
|
} else {
|
|
w.followup = true
|
|
meta.SessionStatus = SessionStatusNew
|
|
}
|
|
|
|
return meta
|
|
}
|
|
|
|
func (w *Writer) writeMetaOnly() error {
|
|
meta := w.getNextFrameMeta()
|
|
b := buf.New()
|
|
if err := b.AppendSupplier(meta.AsSupplier()); err != nil {
|
|
return err
|
|
}
|
|
runtime.KeepAlive(meta)
|
|
return w.writer.Write(buf.NewMultiBufferValue(b))
|
|
}
|
|
|
|
func (w *Writer) writeData(mb buf.MultiBuffer) error {
|
|
meta := w.getNextFrameMeta()
|
|
meta.Option.Add(OptionData)
|
|
|
|
frame := buf.New()
|
|
if err := frame.AppendSupplier(meta.AsSupplier()); err != nil {
|
|
return err
|
|
}
|
|
runtime.KeepAlive(meta)
|
|
if err := frame.AppendSupplier(serial.WriteUint16(uint16(mb.Len()))); err != nil {
|
|
return err
|
|
}
|
|
|
|
mb2 := buf.NewMultiBuffer()
|
|
mb2.Append(frame)
|
|
mb2.AppendMulti(mb)
|
|
return w.writer.Write(mb2)
|
|
}
|
|
|
|
// Write implements buf.MultiBufferWriter.
|
|
func (w *Writer) Write(mb buf.MultiBuffer) error {
|
|
if mb.IsEmpty() {
|
|
return w.writeMetaOnly()
|
|
}
|
|
|
|
const chunkSize = 8 * 1024
|
|
for !mb.IsEmpty() {
|
|
slice := mb.SliceBySize(chunkSize)
|
|
if err := w.writeData(slice); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (w *Writer) Close() {
|
|
meta := FrameMetadata{
|
|
SessionID: w.id,
|
|
SessionStatus: SessionStatusEnd,
|
|
}
|
|
|
|
frame := buf.New()
|
|
frame.AppendSupplier(meta.AsSupplier())
|
|
runtime.KeepAlive(meta)
|
|
|
|
w.writer.Write(buf.NewMultiBufferValue(frame))
|
|
}
|