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implement the new header format

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This commit is contained in:
Marten Seemann 2019-07-09 13:04:40 +07:00
parent 9a8e590cf8
commit dc33db1c18
6 changed files with 74 additions and 106 deletions
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31
internal/wire/header.go
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@ -27,7 +27,7 @@ func ParseConnectionID(data []byte, shortHeaderConnIDLen int) (protocol.Connecti
if len(data) < 6 {
return nil, io.EOF
}
destConnIDLen, _ := decodeConnIDLen(data[5])
destConnIDLen := int(data[5])
if len(data) < 6+destConnIDLen {
return nil, io.EOF
}
@ -139,16 +139,19 @@ func (h *Header) parseLongHeader(b *bytes.Reader) error {
if h.Version != 0 && h.typeByte&0x40 == 0 {
return errors.New("not a QUIC packet")
}
connIDLenByte, err := b.ReadByte()
destConnIDLen, err := b.ReadByte()
if err != nil {
return err
}
dcil, scil := decodeConnIDLen(connIDLenByte)
h.DestConnectionID, err = protocol.ReadConnectionID(b, dcil)
h.DestConnectionID, err = protocol.ReadConnectionID(b, int(destConnIDLen))
if err != nil {
return err
}
h.SrcConnectionID, err = protocol.ReadConnectionID(b, scil)
srcConnIDLen, err := b.ReadByte()
if err != nil {
return err
}
h.SrcConnectionID, err = protocol.ReadConnectionID(b, int(srcConnIDLen))
if err != nil {
return err
}
@ -172,8 +175,11 @@ func (h *Header) parseLongHeader(b *bytes.Reader) error {
}
if h.Type == protocol.PacketTypeRetry {
odcil := decodeSingleConnIDLen(h.typeByte & 0xf)
h.OrigDestConnectionID, err = protocol.ReadConnectionID(b, odcil)
origDestConnIDLen, err := b.ReadByte()
if err != nil {
return err
}
h.OrigDestConnectionID, err = protocol.ReadConnectionID(b, int(origDestConnIDLen))
if err != nil {
return err
}
@ -238,14 +244,3 @@ func (h *Header) ParseExtended(b *bytes.Reader, ver protocol.VersionNumber) (*Ex
func (h *Header) toExtendedHeader() *ExtendedHeader {
return &ExtendedHeader{Header: *h}
}
func decodeConnIDLen(enc byte) (int /*dest conn id len*/, int /*src conn id len*/) {
return decodeSingleConnIDLen(enc >> 4), decodeSingleConnIDLen(enc & 0xf)
}
func decodeSingleConnIDLen(enc uint8) int {
if enc == 0 {
return 0
}
return int(enc) + 3
}