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75 lines
1.3 KiB
75 lines
1.3 KiB
package kcp
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import (
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"io"
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"sync"
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"github.com/v2ray/v2ray-core/common/alloc"
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v2io "github.com/v2ray/v2ray-core/common/io"
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)
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type SegmentWriter struct {
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sync.Mutex
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mtu uint32
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buffer *alloc.Buffer
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writer v2io.Writer
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}
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func NewSegmentWriter(writer *AuthenticationWriter) *SegmentWriter {
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return &SegmentWriter{
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mtu: writer.Mtu(),
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writer: writer,
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}
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}
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func (this *SegmentWriter) Write(seg ISegment) {
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this.Lock()
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defer this.Unlock()
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nBytes := seg.ByteSize()
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if uint32(this.buffer.Len()+nBytes) > this.mtu {
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this.FlushWithoutLock()
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}
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if this.buffer == nil {
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this.buffer = alloc.NewSmallBuffer().Clear()
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}
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this.buffer.Append(seg.Bytes(nil))
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}
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func (this *SegmentWriter) FlushWithoutLock() {
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this.writer.Write(this.buffer)
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this.buffer = nil
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}
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func (this *SegmentWriter) Flush() {
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this.Lock()
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defer this.Unlock()
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if this.buffer.Len() == 0 {
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return
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}
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this.FlushWithoutLock()
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}
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type AuthenticationWriter struct {
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Authenticator Authenticator
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Writer io.Writer
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}
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func (this *AuthenticationWriter) Write(payload *alloc.Buffer) error {
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defer payload.Release()
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this.Authenticator.Seal(payload)
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_, err := this.Writer.Write(payload.Value)
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return err
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}
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func (this *AuthenticationWriter) Release() {}
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func (this *AuthenticationWriter) Mtu() uint32 {
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return effectiveConfig.Mtu - uint32(this.Authenticator.HeaderSize())
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}
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