Enum OptionCode 

#[repr(u16)]
pub enum OptionCode {
    LLQ = 1,
    UL = 2,
    NSID = 3,
    DAU = 5,
    DHU = 6,
    N3U = 7,
    EDNSCLIENTSUBNET = 8,
    EDNSEXPIRE = 9,
    COOKIE = 10,
    EDNSTCPKEEPALIVE = 11,
    PADDING = 12,
    CHAIN = 13,
    EDNSKEYTAG = 14,
    EDNSERROR = 15,
    EDNSCLIENTTAG = 16,
    EDNSSERVERTAG = 17,
    DEVICEID = 26_946,
    UNKNOWN = 26947,
}

Variants

LLQ = 1

Long-Lived Queries

UL = 2

Update Leases

NSID = 3

Name Server Identifier

DAU = 5

DNSSEC Algorithm Understood

DHU = 6

DS Hash Understood

N3U = 7

NSEC3 Hash Understood

EDNSCLIENTSUBNET = 8

EDNS0 option to allow Recursive Resolvers, if they are willing, to forward details about the origin network from which a query is coming when talking to other nameservers

EDNSEXPIRE = 9

See https://tools.ietf.org/html/rfc7314

COOKIE = 10

See https://tools.ietf.org/html/rfc7873#section-4

EDNSTCPKEEPALIVE = 11

Signals a variable idle timeout

PADDING = 12

Allows DNS clients and servers to pad requests and responses by a variable number of octets

CHAIN = 13

Allows a security-aware validating resolver to send a single query requesting a complete validation path along with the regular answer

EDNSKEYTAG = 14

Provides origin authentication using digital signatures

EDNSERROR = 15

Returning additional information about the cause of DNS errors

EDNSCLIENTTAG = 16

Draft, usage is being determined. See https://www.ietf.org/archive/id/draft-bellis-dnsop-edns-tags-01.txt

EDNSSERVERTAG = 17

Draft, usage is being determined. See https://www.ietf.org/archive/id/draft-bellis-dnsop-edns-tags-01.txt

DEVICEID = 26_946

A way of identifying a device via DNS in the OPT RDATA

UNKNOWN = 26947

Implementations

impl OptionCode

pub fn from_raw(val: u16) -> Self

Trait Implementations

impl Clone for OptionCode

fn clone(&self) -> OptionCode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for OptionCode

impl Debug for OptionCode

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

Formats the value using the given formatter.

impl Eq for OptionCode

impl PartialEq for OptionCode

fn eq(&self, other: &OptionCode) -> 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 OptionCode

impl TryFrom<u16> for OptionCode

type Error = TryFromPrimitiveError<OptionCode>

The type returned in the event of a conversion error.

fn try_from(number: u16) -> Result<Self, TryFromPrimitiveError<Self>>

Performs the conversion.

impl TryFromPrimitive for OptionCode

const NAME: &'static str = "OptionCode"

type Primitive = u16

fn try_from_primitive( number: Self::Primitive, ) -> Result<Self, TryFromPrimitiveError<Self>>