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v2fly/proxy/vmess/io/writer.go

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package io
import (
"hash/fnv"
"github.com/v2ray/v2ray-core/common/alloc"
v2io "github.com/v2ray/v2ray-core/common/io"
"github.com/v2ray/v2ray-core/common/serial"
)
type AuthChunkWriter struct {
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writer v2io.Writer
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}
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func NewAuthChunkWriter(writer v2io.Writer) *AuthChunkWriter {
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return &AuthChunkWriter{
writer: writer,
}
}
func (this *AuthChunkWriter) Write(buffer *alloc.Buffer) error {
Authenticate(buffer)
return this.writer.Write(buffer)
}
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func (this *AuthChunkWriter) Release() {
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this.writer.Release()
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this.writer = nil
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}
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func Authenticate(buffer *alloc.Buffer) {
fnvHash := fnv.New32a()
fnvHash.Write(buffer.Value)
buffer.SliceBack(4)
fnvHash.Sum(buffer.Value[:0])
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buffer.Prepend(serial.Uint16ToBytes(uint16(buffer.Len())))
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}