Struct goatns::Header

pub struct Header {

    pub(crate) id: u16,
    pub(crate) qr: PacketType,
    pub(crate) opcode: OpCode,
    pub(crate) authoritative: bool,
    pub(crate) truncated: bool,
    pub(crate) recursion_desired: bool,
    pub(crate) recursion_available: bool,
    pub(crate) z: bool,
    pub(crate) ad: bool,
    pub(crate) cd: bool,
    pub(crate) rcode: Rcode,
    pub(crate) qdcount: u16,
    pub(crate) ancount: u16,
    pub(crate) nscount: u16,
    pub(crate) arcount: u16,
}

The header of a DNS transmission, either a Query or Reply. Ref RFC1035 section 4.1.1.

Fields

id: u16

The query ID

qr: PacketType

opcode: OpCode

authoritative: bool

truncated: bool

recursion_desired: bool

recursion_available: bool

z: bool

reserved, must be all 0’s

ad: bool

cd: bool

rcode: Rcode

qdcount: u16

an unsigned 16 bit integer specifying the number of entries in the question section.

ancount: u16

an unsigned 16 bit integer specifying the number of entries in the answer section.

nscount: u16

an unsigned 16 bit integer specifying the number of name server resource records in the authority records section.

arcount: u16

an unsigned 16 bit integer specifying the number of resource records in the additional records section.

Implementations

impl Header

pub fn packed_struct_display_formatter<'a>( &'a self ) -> PackedStructDisplay<'a, Self>

Display formatter for console applications

impl Header

pub fn as_answer(self) -> Header

Trait Implementations

impl Clone for Header

fn clone(&self) -> Header

Returns a copy 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 Default for Header

fn default() -> Self

Returns the “default value” for a type.

impl Display for Header

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

Formats the value using the given formatter.

impl PackedStruct for Header

Structure that can be packed an unpacked into 12 bytes.

Bit, MSB0	Name	Type
0:15	id	u16
16	qr	PacketType
17:20	opcode	OpCode
21	authoritative	bool
22	truncated	bool
23	recursion_desired	bool
24	recursion_available	bool
25	z	bool
26	ad	bool
27	cd	bool
28:31	rcode	Rcode
32:47	qdcount	u16
48:63	ancount	u16
64:79	nscount	u16
80:95	arcount	u16

type ByteArray = [u8; 12]

The appropriately sized byte array into which this structure will be packed, for example [u8; 2].

fn pack(&self) -> PackingResult<Self::ByteArray>

Packs the structure into a byte array.

fn unpack(src: &Self::ByteArray) -> Result<Header, PackingError>

Unpacks the structure from a byte array.

impl PackedStructDebug for Header

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

fn packed_struct_display_header() -> &'static str

impl PackedStructInfo for Header

fn packed_bits() -> usize

Number of bits that this structure occupies when being packed.

impl PartialEq for Header

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Eq for Header

impl StructuralEq for Header

impl StructuralPartialEq for Header