Module edns

EDNS Options

Classes

Option
Base class for all EDNS option types.

GenericOption
Generic Option Class

ECSOption
EDNS Client Subnet (ECS, RFC7871)

Functions

get_option_class(otype)
Return the class for the specified option type.

source code

option_from_wire(otype, wire, current, olen)
Build an EDNS option object from wire format.

source code

Variables

NSID = 3

DAU = 5

DHU = 6

N3U = 7

ECS = 8

EXPIRE = 9

COOKIE = 10

KEEPALIVE = 11

PADDING = 12

CHAIN = 13

_type_to_class = {8: <class 'dns.edns.ECSOption'>}

__package__ = None
hash(x)

Function Details

Return the class for the specified option type.

The GenericOption class is used if a more specific class is not known.

Build an EDNS option object from wire format.

*otype*, an ``int``, is the option type.

*wire*, a ``binary``, is the wire-format message.

*current*, an ``int``, is the offset in *wire* of the beginning of the rdata.

*olen*, an ``int``, is the length of the wire-format option data

Returns an instance of a subclass of ``dns.edns.Option``.