Struct Header 

pub struct Header { /* private fields */ }

DNS message header.

Implementations

impl Header

pub const fn new() -> Header

Constructs a zero-initialized header.

pub const fn id(&self) -> u16

Returns the transaction ID.

pub const fn flags(&self) -> Flags

Returns the flags.

pub fn flags_mut(&mut self) -> &mut Flags

Returns a mutable reference to the flags for in-place modification.

pub const fn question_count(&self) -> u16

Returns the number of questions.

pub const fn answer_count(&self) -> u16

Returns the number of answer records.

pub const fn authority_count(&self) -> u16

Returns the number of authority records.

pub const fn additional_count(&self) -> u16

Returns the number of additional records.

pub const fn set_id(&mut self, v: u16) -> &mut Header

Sets the transaction ID.

pub const fn set_flags(&mut self, v: Flags) -> &mut Header

Sets the flags.

pub const fn set_question_count(&mut self, v: u16) -> &mut Header

Sets the number of questions.

pub const fn set_answer_count(&mut self, v: u16) -> &mut Header

Sets the number of answer records.

pub const fn set_authority_count(&mut self, v: u16) -> &mut Header

Sets the number of authority records.

pub const fn set_additional_count(&mut self, v: u16) -> &mut Header

Sets the number of additional records.

pub const fn with_id(self, v: u16) -> Header

Returns a header with the transaction ID set.

pub const fn with_flags(self, v: Flags) -> Header

Returns a header with the flags set.

pub const fn with_question_count(self, v: u16) -> Header

Returns a header with the number of questions set.

pub const fn with_answer_count(self, v: u16) -> Header

Returns a header with the number of answer records set.

pub const fn with_authority_count(self, v: u16) -> Header

Returns a header with the number of authority records set.

pub const fn with_additional_count(self, v: u16) -> Header

Returns a header with the number of additional records set.

pub fn try_parse(buf: &[u8]) -> Result<(Header, &[u8]), ParseError>

Parse a 12-byte DNS header from the start of buf. Returns the header and a slice of the bytes following it.

pub fn write(&self, out: &mut [u8]) -> Result<usize, EncodeError>

Write a 12-byte DNS header into the start of out. Returns the number of bytes written (always HEADER_SIZE on success).

Trait Implementations

impl Clone for Header

fn clone(&self) -> Header

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Header

impl Debug for Header

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

Formats the value using the given formatter.

impl Default for Header

fn default() -> Header

Returns the “default value” for a type.

impl Eq for Header

impl Hash for Header

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Header

fn eq(&self, other: &Header) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Header