1package wire
2
3import (
4	"bytes"
5	"io"
6
7	"github.com/lucas-clemente/quic-go/internal/protocol"
8	"github.com/lucas-clemente/quic-go/internal/utils"
9)
10
11// A NewTokenFrame is a NEW_TOKEN frame
12type NewTokenFrame struct {
13	Token []byte
14}
15
16func parseNewTokenFrame(r *bytes.Reader, _ protocol.VersionNumber) (*NewTokenFrame, error) {
17	if _, err := r.ReadByte(); err != nil {
18		return nil, err
19	}
20	tokenLen, err := utils.ReadVarInt(r)
21	if err != nil {
22		return nil, err
23	}
24	if uint64(r.Len()) < tokenLen {
25		return nil, io.EOF
26	}
27	token := make([]byte, int(tokenLen))
28	if _, err := io.ReadFull(r, token); err != nil {
29		return nil, err
30	}
31	return &NewTokenFrame{Token: token}, nil
32}
33
34func (f *NewTokenFrame) Write(b *bytes.Buffer, _ protocol.VersionNumber) error {
35	b.WriteByte(0x7)
36	utils.WriteVarInt(b, uint64(len(f.Token)))
37	b.Write(f.Token)
38	return nil
39}
40
41// Length of a written frame
42func (f *NewTokenFrame) Length(protocol.VersionNumber) protocol.ByteCount {
43	return 1 + utils.VarIntLen(uint64(len(f.Token))) + protocol.ByteCount(len(f.Token))
44}
45