Copyright	(c) Viktor Dukhovni 2026
License	BSD-3-Clause
Maintainer	ietf-dane@dukhovni.org
Stability	unstable
Safe Haskell	None
Language	GHC2024

Net.DNSBase.Opcode

Contents

DNS request and reply OPCODE numbers

Description

The 4-bit OPCODE field of a DNS message header — usually QUERY for ordinary lookups, with IQUERY, STATUS, NOTIFY, and UPDATE for less common message kinds. See the IANA DNS Operation Codes registry for the full list.

Synopsis

data Opcode where
- pattern DSO :: Opcode
- pattern IQuery :: Opcode
- pattern Notify :: Opcode
- pattern Opcode :: Word8 -> Opcode
- pattern Query :: Opcode
- pattern Status :: Opcode
- pattern Update :: Opcode

DNS request and reply OPCODE numbers

data Opcode where Source #

The DNS request Opcode from the basic DNS header. Attempts to construct an Opcode larger than 15 will produce in an error.

Bundled Patterns

pattern DSO :: Opcode	DSO - [RFC8490] DNS Stateful Operations
pattern IQuery :: Opcode	IQuery - [RFC3425]
pattern Notify :: Opcode	Notify - [RFC1996]
pattern Opcode :: Word8 -> Opcode
pattern Query :: Opcode	Query - [RFC1035]
pattern Status :: Opcode	Status - [RFC1035]
pattern Update :: Opcode	Update - [RFC2136]

Instances

Instances details

Presentable Opcode Source #	The `Presentable` instance outputs BIND-compatible names.
Instance details Defined in Net.DNSBase.Internal.Opcode Methods present :: Opcode -> Builder -> Builder Source # presentLazy :: Opcode -> ByteString -> ByteString Source #
Bounded Opcode Source #
Instance details Defined in Net.DNSBase.Internal.Opcode Methods minBound :: Opcode # maxBound :: Opcode #
Enum Opcode Source #
Instance details Defined in Net.DNSBase.Internal.Opcode Methods succ :: Opcode -> Opcode # pred :: Opcode -> Opcode # toEnum :: Int -> Opcode # fromEnum :: Opcode -> Int # enumFrom :: Opcode -> [Opcode] # enumFromThen :: Opcode -> Opcode -> [Opcode] # enumFromTo :: Opcode -> Opcode -> [Opcode] # enumFromThenTo :: Opcode -> Opcode -> Opcode -> [Opcode] #
Show Opcode Source #
Instance details Defined in Net.DNSBase.Internal.Opcode Methods showsPrec :: Int -> Opcode -> ShowS # show :: Opcode -> String # showList :: [Opcode] -> ShowS #
Eq Opcode Source #
Instance details Defined in Net.DNSBase.Internal.Opcode Methods (==) :: Opcode -> Opcode -> Bool # (/=) :: Opcode -> Opcode -> Bool #
Ord Opcode Source #
Instance details Defined in Net.DNSBase.Internal.Opcode Methods compare :: Opcode -> Opcode -> Ordering # (<) :: Opcode -> Opcode -> Bool # (<=) :: Opcode -> Opcode -> Bool # (>) :: Opcode -> Opcode -> Bool # (>=) :: Opcode -> Opcode -> Bool # max :: Opcode -> Opcode -> Opcode # min :: Opcode -> Opcode -> Opcode #