package dns

// https://datatracker.ietf.org/doc/html/rfc6895#section-2.2

const (
	OpQuery  = 0
	OpIQuery = 1
	OpStatus = 2
	OpNotify = 4
	OpUpdate = 5
)

// https://datatracker.ietf.org/doc/html/rfc6895
const (
	RcodeNoError   = 0
	RcodeFormError = 1
	RcodeServFail  = 2
	RcodeNxDomain  = 3
	RcodeNotImp    = 4
	RcodeRefused   = 5
	RcodeYxDomain  = 6
	RcodeYxRrSet   = 7
	RcodeNxRrSet   = 8
	RcodeNotZone   = 10
)

// https://datatracker.ietf.org/doc/html/rfc1035
const (
	TypeA     = 1
	TypeNS    = 2
	TypeCNAME = 5
	typeSOA   = 6
	typePTR   = 12
	typeMX    = 15
	typeTXT   = 16
	typeAAAA  = 28 // https://www.rfc-editor.org/info/rfc8499/
	typeOPT   = 41
)

const (
	ClassIN   = 1
	ClassCS   = 2
	ClassCH   = 3
	ClassHS   = 4
	ClassNONE = 254
	ClassANY  = 255
)