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wire: speed up identification of 0-RTT packets (#3761)

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Marten Seemann 2023-04-19 14:50:57 +02:00 • committed by GitHub
parent a8a24a2bc2
commit eb05964942
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2 changed files with 23 additions and 5 deletions
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12
internal/wire/header.go
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@ -108,13 +108,15 @@ func Is0RTTPacket(b []byte) bool {
return false
}
version := protocol.VersionNumber(binary.BigEndian.Uint32(b[1:5]))
if !protocol.IsSupportedVersion(protocol.SupportedVersions, version) {
//nolint:exhaustive // We only need to test QUIC versions that we support.
switch version {
case protocol.Version1, protocol.VersionDraft29:
return b[0]>>4&0b11 == 0b01
case protocol.Version2:
return b[0]>>4&0b11 == 0b10
default:
return false
}
if version == protocol.Version2 {
return b[0]>>4&0b11 == 0b10
}
return b[0]>>4&0b11 == 0b01
}
var ErrUnsupportedVersion = errors.New("unsupported version")