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package wire
import (
"bytes"
"errors"
"io"
"github.com/lucas-clemente/quic-go/internal/protocol"
"github.com/lucas-clemente/quic-go/internal/utils"
)
// A NewTokenFrame is a NEW_TOKEN frame
type NewTokenFrame struct {
Token []byte
}
func parseNewTokenFrame(r *bytes.Reader, _ protocol.VersionNumber) (*NewTokenFrame, error) {
if _, err := r.ReadByte(); err != nil {
return nil, err
}
tokenLen, err := utils.ReadVarInt(r)
if err != nil {
return nil, err
}
if uint64(r.Len()) < tokenLen {
return nil, io.EOF
}
if tokenLen == 0 {
return nil, errors.New("token must not be empty")
}
token := make([]byte, int(tokenLen))
if _, err := io.ReadFull(r, token); err != nil {
return nil, err
}
return &NewTokenFrame{Token: token}, nil
}
func (f *NewTokenFrame) Write(b *bytes.Buffer, _ protocol.VersionNumber) error {
b.WriteByte(0x7)
utils.WriteVarInt(b, uint64(len(f.Token)))
b.Write(f.Token)
return nil
}
// Length of a written frame
func (f *NewTokenFrame) Length(protocol.VersionNumber) protocol.ByteCount {
return 1 + utils.VarIntLen(uint64(len(f.Token))) + protocol.ByteCount(len(f.Token))
}
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