Constants: Opcode & Type

Opcode – Query opcode

class Opcode

Constants of the Opcode module represent DNS query opcodes. Some of the opcodes are described in RFC 1035. The following constants are defined: QUERY, IQUERY, STATUS, NOTIFY, UPDATE.

The standard query is for example Opcode.QUERY.

Type – Query type

class Type

Constants of the Type module represent DNS query types. The following constants are defined:

A

a host address

NS

an authoritative name server

MD

a mail destination (Obsolete - use MX)

MF

a mail forwarder (Obsolete - use MX)

CNAME

the canonical name for an alias

SOA

marks the start of a zone of authority

MB

mailbox domain name (EXPERIMENTAL)

MG

mail group member (EXPERIMENTAL)

MR

mail rename domain name (EXPERIMENTAL)

NULL

null RR (EXPERIMENTAL)

WKS

well known service description

PTR = 12 # a domain name pointer HINFO = 13 # host information MINFO = 14 # mailbox or mail list information MX = 15 # mail exchange TXT = 16 # text strings AAAA = 28 # IPv6 AAAA records (RFC 1886) SRV = 33 # DNS RR for specifying the location of services (RFC 2782) UNAME = 110 MP = 240 AXFR = 252 # A request for a transfer of an entire zone MAILB = 253 # A request for mailbox-related records (MB, MG or MR) MAILA = 254 # A request for mail agent RRs (Obsolete - see MX) ANY = 255 # A request for all records