Struct Header 

pub struct Header {
    pub metadata: Metadata,
    pub counts: HeaderCounts,
}

Metadata for the Message struct.

RFC 1035, DOMAIN NAMES - IMPLEMENTATION AND SPECIFICATION, November 1987

4.1.1. Header section format

The header contains the following fields

                                   1  1  1  1  1  1
     0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5
    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
    |                      ID                       |
    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
    |QR|   Opcode  |AA|TC|RD|RA|ZZ|AD|CD|   RCODE   |  /// AD and CD from RFC4035
    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
    |                    QDCOUNT / ZCOUNT           |
    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
    |                    ANCOUNT / PRCOUNT          |
    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
    |                    NSCOUNT / UPCOUNT          |
    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
    |                    ARCOUNT / ADCOUNT          |
    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

where

Z               Reserved for future use.  Must be zero in all queries
                and responses.

Fields

metadata: Metadata

The message metadata (ID, flags, response and op code)

counts: HeaderCounts

Record counts for the message, for use during encoding/decoding

Methods from Deref<Target = Metadata>

pub fn flags(&self) -> Flags

A method to get all header flags (useful for Display purposes)

Trait Implementations

impl<'r> BinDecodable<'r> for Header

fn read(decoder: &mut BinDecoder<'r>) -> Result<Self, DecodeError>

Read the type from the stream

fn from_bytes(bytes: &'r [u8]) -> Result<Self, DecodeError>

Returns the object in binary form

impl BinEncodable for Header

fn emit(&self, encoder: &mut BinEncoder<'_>) -> Result<(), ProtoError>

Write the type to the stream

fn to_bytes(&self) -> Result<Vec<u8>, ProtoError>

Returns the object in binary form

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 Debug for Header

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

Formats the value using the given formatter.

impl Deref for Header

type Target = Metadata

The resulting type after dereferencing.

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

Dereferences the value.

impl EncodedSize for Header

const LEN: usize = 12

Number of bytes used when encoding the type

impl Hash for Header

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

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 PartialOrd for Header

fn partial_cmp(&self, other: &Header) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for Header

impl Eq for Header

impl StructuralPartialEq for Header