Struct DnsHeader 

pub struct DnsHeader {
    pub id: u16,
    pub qr: bool,
    pub opcode: u8,
    pub aa: bool,
    pub tc: bool,
    pub rd: bool,
    pub ra: bool,
    pub rcode: DnsResponseCode,
    pub qdcount: u16,
    pub ancount: u16,
    pub nscount: u16,
    pub arcount: u16,
}

DNS message header (12 bytes)

Fields

id: u16

Transaction ID

qr: bool

QR: 0=query, 1=response

opcode: u8

Opcode: 0=standard query

aa: bool

Authoritative answer

tc: bool

Message truncated

rd: bool

Recursion desired

ra: bool

Recursion available

rcode: DnsResponseCode

Response code

qdcount: u16

Question count

ancount: u16

Answer count

nscount: u16

Authority count

arcount: u16

Additional count

Implementations

impl DnsHeader

pub const SIZE: usize = 12usize

pub fn new_query(id: u16) -> Self

Create a new query header

pub fn to_bytes(&self, buf: &mut [u8]) -> Result<usize, DnsError>

Serialize header to bytes

pub fn from_bytes(buf: &[u8]) -> Result<Self, DnsError>

Parse header from bytes

Trait Implementations

impl Clone for DnsHeader

fn clone(&self) -> DnsHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DnsHeader

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

Formats the value using the given formatter.

impl PartialEq for DnsHeader

fn eq(&self, other: &DnsHeader) -> 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 Eq for DnsHeader

impl StructuralPartialEq for DnsHeader