Module opt

Record data for OPT records.

Since DNS message headers are relatively short, the amount of information that can be conveyed through them is very limited. In order to provide an extensible means to transmit additional information, RFC 6891 introduces a resource record called OPT that can be added to the additional section of a message. The record data in turn consists of a sequence of options.

This module contains the types for working with both the OPT record and its record data. It defines types for each of the currently defined options. As with record data types in the rdata module, these are arranged in sub-modules according to the RFC that defined them and then re-exported here.

Re-exports

pub use self::algsig::Dau;

pub use self::algsig::Dhu;

pub use self::algsig::N3u;

pub use self::chain::Chain;

pub use self::cookie::Cookie;

pub use self::expire::Expire;

pub use self::exterr::ExtendedError;

pub use self::keepalive::TcpKeepalive;

pub use self::keytag::KeyTag;

pub use self::nsid::Nsid;

pub use self::padding::Padding;

pub use self::subnet::ClientSubnet;

Modules

algsig

EDNS options for signaling cryptographic algorithm understanding.

chain

EDNS option to request the complete DNSSEC validation chain.

cookie

EDNS Option for DNS cookies.

expire

EDNS Options for signalling zone expire times.

exterr

EDNS option for extended DNS errors.

keepalive

EDNS options to signal a variable TCP connection timeout.

keytag

EDNS options to signal the trust anchor key used in DNSSEC validation.

nsid

ENDS option to provide a Name Server Identifer.

padding

EDNS options for paddin message sizes.

subnet

EDNS option for carrying client subnet information.

Structs

LongOptData

The octets sequence to be used for option data is too long.

Opt

OPT record data.

OptHeader

The header of an OPT record.

OptIter

An iterator over the options of an OPT record.

OptRecord

An entire OPT record.

OptionHeader

The header of an OPT option.

UnknownOptData

An OPT option in its raw form.

Enums

AllOptData

BuildDataError

An error happened while constructing an SVCB value.

Traits

ComposeOptData

An OPT option that can be written to wire format.

OptData

A type representing an OPT option.

ParseOptData

An OPT option that can be parsed from the record data.