mirrors/uquic
1
0
Fork 0
mirror of https://github.com/refraction-networking/uquic.git synced 2025-04-03 20:27:35 +03:00
Code Issues Projects Releases Packages Wiki Activity

implement parsing and writing of QUIC v2 packet headers

Browse source
This commit is contained in:
Marten Seemann 2022-05-23 19:36:14 +02:00
parent 909a3a9093
commit f3744f6535
6 changed files with 164 additions and 46 deletions
Download patch file Download diff file Expand all files Collapse all files

39
internal/wire/header.go
View file

@ -53,10 +53,14 @@ func Is0RTTPacket(b []byte) bool {
if b[0]&0x80 == 0 {
return false
}
if !protocol.IsSupportedVersion(protocol.SupportedVersions, protocol.VersionNumber(binary.BigEndian.Uint32(b[1:5]))) {
version := protocol.VersionNumber(binary.BigEndian.Uint32(b[1:5]))
if !protocol.IsSupportedVersion(protocol.SupportedVersions, version) {
return false
}
return b[0]&0x30>>4 == 0x1
if version == protocol.Version2 {
return b[0]>>4&0b11 == 0b10
}
return b[0]>>4&0b11 == 0b01
}
var ErrUnsupportedVersion = errors.New("unsupported version")
@ -179,15 +183,28 @@ func (h *Header) parseLongHeader(b *bytes.Reader) error {
return ErrUnsupportedVersion
}
switch (h.typeByte & 0x30) >> 4 {
case 0x0:
h.Type = protocol.PacketTypeInitial
case 0x1:
h.Type = protocol.PacketType0RTT
case 0x2:
h.Type = protocol.PacketTypeHandshake
case 0x3:
h.Type = protocol.PacketTypeRetry
if h.Version == protocol.Version2 {
switch h.typeByte >> 4 & 0b11 {
case 0b00:
h.Type = protocol.PacketTypeRetry
case 0b01:
h.Type = protocol.PacketTypeInitial
case 0b10:
h.Type = protocol.PacketType0RTT
case 0b11:
h.Type = protocol.PacketTypeHandshake
}
} else {
switch h.typeByte >> 4 & 0b11 {
case 0b00:
h.Type = protocol.PacketTypeInitial
case 0b01:
h.Type = protocol.PacketType0RTT
case 0b10:
h.Type = protocol.PacketTypeHandshake
case 0b11:
h.Type = protocol.PacketTypeRetry
}
}
if h.Type == protocol.PacketTypeRetry {