Struct AuthorityBuilder

pub struct AuthorityBuilder<Target> { /* private fields */ }

Builds the authority section of a DNS message.

A value of this type can be acquired by calling the authority method on any other builder type. See the module documentation for an overview of how to build a message.

You can push records to the end of the authority section via the push method. It accepts various things that represent resource records: record values and references, tuples of an owner domain name, a class, TTL, and record data, as well as tuples of just the owner, TTL, and data, assuming the class of IN.

Once you are finished building the authority section, you can progress to the additional section via the additional method or finish the message via finish. Additionally, conversions to all other builder types are available as well.

Implementations

impl<Target: Composer> AuthorityBuilder<Target>

pub fn push(&mut self, record: impl ComposeRecord) -> Result<(), PushError>

Appends a record to the authority section.

This methods accepts anything that implements the ComposeRecord trait. Apart from record values and references, this are tuples of the owner domain name, optionally the class (which is taken to be IN if missing), the TTL, and record data.

In other words, you can do the following things:

use domain::base::{Name, MessageBuilder, Record, Rtype, Ttl};
use domain::base::iana::Class;
use domain::rdata::A;

let mut msg = MessageBuilder::new_vec().authority();
let record = Record::new(
    Name::root_ref(), Class::IN, Ttl::from_secs(86400),
    A::from_octets(192, 0, 2, 1)
);
msg.push(&record).unwrap();
msg.push(record).unwrap();
msg.push(
    (Name::root_ref(), Class::IN, 86400, A::from_octets(192, 0, 2, 1))
).unwrap();
msg.push(
    (Name::root_ref(), 86400, A::from_octets(192, 0, 2, 1))
).unwrap();

impl<Target: Composer> AuthorityBuilder<Target>

Conversions

Additional conversion methods are available via the Deref implementation.

pub fn rewind(&mut self)

Rewinds to an empty authority section.

All previously added authority records will be lost.

pub fn builder(self) -> MessageBuilder<Target>

Converts the authority builder into a message builder.

All questions, answer and authority records will be dropped and all sections will be empty.

pub fn question(self) -> QuestionBuilder<Target>

Converts the authority builder into a question builder.

All authority and answer records will be dropped. All previously added questions will, however, remain.

pub fn answer(self) -> AnswerBuilder<Target>

Converts the authority builder into an answer builder.

All authority records will be dropped. All previously added questions and answer records will, however, remain.

pub fn authority(self) -> AuthorityBuilder<Target>

Converts the authority builder into an authority builder.

This is identical to the identity function.

pub fn additional(self) -> AdditionalBuilder<Target>

Converts the authority builder into an additional builder.

pub fn finish(self) -> Target

Converts the authority builder into the underlying octets builder.

This will leave the additional section empty.

impl<Target: FreezeBuilder> AuthorityBuilder<Target>

pub fn into_message(self) -> Message<Target::Octets>

Converts the authority builder into the final message.

The method will return a message atop whatever octets sequence the builder’s octets builder converts into.

impl<Target> AuthorityBuilder<Target>

pub fn as_builder(&self) -> &MessageBuilder<Target>

Returns a reference to the underlying message builder.

pub fn as_builder_mut(&mut self) -> &mut MessageBuilder<Target>

Returns a mutable reference to the underlying message builder.

Methods from Deref<Target = MessageBuilder<Target>>

pub fn set_push_limit(&mut self, limit: usize)

Limit how much of the underlying buffer may be used.

When a limit is set, calling push() on a message section (e.g. AdditionalBuilder::push()) will fail if the limit is exceeded just as if the actual end of the underlying buffer had been reached.

Note: Calling this function does NOT truncate the underlying buffer. If the new limit is lees than the amount of the buffer that has already been used, exisitng content beyond the limit will remain untouched, the length will remain larger than the limit, and calls to push() will fail until the buffer is truncated to a size less than the limit.

pub fn clear_push_limit(&mut self)

Clear the push limit, if set.

Removes any push limit previously set via [set_push_limit()].

pub fn push_limit(&self) -> Option<usize>

Returns the current push limit, if set.

pub fn header(&self) -> Header

Return the current value of the message header.

pub fn counts(&self) -> HeaderCounts

Return the current value of the message header counts.

pub fn header_mut(&mut self) -> &mut Header

Returns a mutable reference to the message header for manipulations.

pub fn as_target(&self) -> &Target

Returns a reference to the underlying octets builder.

pub fn as_slice(&self) -> &[u8]

where Target: AsRef<[u8]>,

Returns an octets slice of the octets assembled so far.

pub fn as_message(&self) -> Message<&[u8]>

where Target: AsRef<[u8]>,

Returns a message atop for the octets assembled so far.

This message is atop the octets slices derived from the builder, so it can be created cheaply.

Trait Implementations

impl<Target> AsMut<MessageBuilder<Target>> for AuthorityBuilder<Target>

fn as_mut(&mut self) -> &mut MessageBuilder<Target>

Converts this type into a mutable reference of the (usually inferred) input type.

impl<Target: AsRef<[u8]>> AsRef<[u8]> for AuthorityBuilder<Target>

fn as_ref(&self) -> &[u8]

Converts this type into a shared reference of the (usually inferred) input type.

impl<Target> AsRef<MessageBuilder<Target>> for AuthorityBuilder<Target>

fn as_ref(&self) -> &MessageBuilder<Target>

Converts this type into a shared reference of the (usually inferred) input type.

impl<Target> AsRef<Target> for AuthorityBuilder<Target>

fn as_ref(&self) -> &Target

Converts this type into a shared reference of the (usually inferred) input type.

impl<Target: Clone> Clone for AuthorityBuilder<Target>

fn clone(&self) -> AuthorityBuilder<Target>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<Target: Debug> Debug for AuthorityBuilder<Target>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<Target> Deref for AuthorityBuilder<Target>

type Target = MessageBuilder<Target>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<Target> DerefMut for AuthorityBuilder<Target>

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl<Target> From<AdditionalBuilder<Target>> for AuthorityBuilder<Target>

where Target: Composer,

fn from(src: AdditionalBuilder<Target>) -> Self

Converts to this type from the input type.

impl<Target> From<AnswerBuilder<Target>> for AuthorityBuilder<Target>

where Target: Composer,

fn from(src: AnswerBuilder<Target>) -> Self

Converts to this type from the input type.

impl<Target> From<AuthorityBuilder<Target>> for AdditionalBuilder<Target>

where Target: Composer,

fn from(src: AuthorityBuilder<Target>) -> Self

Converts to this type from the input type.

impl<Target> From<AuthorityBuilder<Target>> for AnswerBuilder<Target>

where Target: Composer,

fn from(src: AuthorityBuilder<Target>) -> Self

Converts to this type from the input type.

impl<Target> From<AuthorityBuilder<Target>> for Message<Target::Octets>

where Target: FreezeBuilder,

fn from(src: AuthorityBuilder<Target>) -> Self

Converts to this type from the input type.

impl<Target> From<AuthorityBuilder<Target>> for MessageBuilder<Target>

where Target: Composer,

fn from(src: AuthorityBuilder<Target>) -> Self

Converts to this type from the input type.

impl<Target> From<AuthorityBuilder<Target>> for QuestionBuilder<Target>

where Target: Composer,

fn from(src: AuthorityBuilder<Target>) -> Self

Converts to this type from the input type.

impl<Target> From<MessageBuilder<Target>> for AuthorityBuilder<Target>

where Target: Composer,

fn from(src: MessageBuilder<Target>) -> Self

Converts to this type from the input type.

impl<Target> From<QuestionBuilder<Target>> for AuthorityBuilder<Target>

where Target: Composer,

fn from(src: QuestionBuilder<Target>) -> Self

Converts to this type from the input type.

impl<Target: Composer> RecordSectionBuilder<Target> for AuthorityBuilder<Target>

fn push(&mut self, record: impl ComposeRecord) -> Result<(), PushError>

Appends a record to a record section.