Enum domain::base::iana::class::Class

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pub enum Class {
    In,
    Ch,
    Hs,
    None,
    Any,
    Int(u16),
}
Expand description

DNS CLASSes.

The domain name space is partitioned into separate classes for different network types. That is, each class has its own separate record tree starting at the root. However, in practice, only the IN class is really relevant.

In addition, there are query classes or QCLASSes that are used in questions or UPDATE queries, namely NONE and ANY (or *).

Classes are represented by a 16 bit value. The enum wraps these values.

See RFC 1034 for the introduction of classes, section 3.2 of RFC 6895 for a discussion of the current state of afairs, and the DNS CLASSes IANA registry for an overview of assigned values. This type is complete as of the registry update of 2019-01-28.

Variants§

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In

Internet (IN).

This class is defined in RFC 1035 and really the only one relevant at all.

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Ch

Chaosnet (CH).

A network protocol developed at MIT in the 1970s. Reused by BIND for built-in server information zones.“,

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Hs

Hesiod (HS).

A system information protocol part of MIT’s Project Athena.“,

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None

Query class None.

Defined in RFC 2136, this class is used in UPDATE queries to require that an RRset does not exist prior to the update.“,

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Any

Query class * (ANY).

This class can be used in a query to indicate that records for the given name from any class are requested.“,

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Int(u16)

A raw value given through its integer.

Implementations§

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impl Class

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pub const fn from_int(value: u16) -> Self

Returns a value from its raw integer value.

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pub const fn to_int(self) -> u16

Returns the raw integer value for a value.

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pub fn from_mnemonic(m: &[u8]) -> Option<Self>

Returns a value from a well-defined mnemonic.

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pub const fn to_mnemonic(self) -> Option<&'static [u8]>

Returns the mnemonic for this value if there is one.

This will also return a mnemonic if a well-defined variant is hidden in a Int variant.

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pub fn parse<'a, Octs: AsRef<[u8]> + ?Sized>( parser: &mut Parser<'a, Octs>, ) -> Result<Self, ParseError>

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pub const COMPOSE_LEN: u16 = 2u16

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pub fn compose<Target: OctetsBuilder + ?Sized>( &self, target: &mut Target, ) -> Result<(), Target::AppendError>

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impl Class

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pub fn from_bytes(bytes: &[u8]) -> Option<Self>

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impl Class

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pub fn scan<S: Scanner>(scanner: &mut S) -> Result<Self, S::Error>

Trait Implementations§

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impl Clone for Class

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fn clone(&self) -> Class

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Class

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

Formats the value using the given formatter. Read more
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impl Display for Class

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

Formats the value using the given formatter. Read more
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impl<'a> From<&'a Class> for u16

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fn from(value: &'a Class) -> Self

Converts to this type from the input type.
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impl From<Class> for u16

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fn from(value: Class) -> Self

Converts to this type from the input type.
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impl From<u16> for Class

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fn from(value: u16) -> Self

Converts to this type from the input type.
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impl FromStr for Class

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type Err = FromStrError

The associated error which can be returned from parsing.
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fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type. Read more
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impl Hash for Class

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

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for Class

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fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl PartialEq<Class> for u16

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialEq<u16> for Class

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fn eq(&self, other: &u16) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd<Class> for u16

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

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl PartialOrd<u16> for Class

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fn partial_cmp(&self, other: &u16) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

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

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

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

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

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impl Eq for Class

Auto Trait Implementations§

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impl Freeze for Class

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impl RefUnwindSafe for Class

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impl Send for Class

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impl Sync for Class

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impl Unpin for Class

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impl UnwindSafe for Class

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> CloneToUninit for T
where T: Copy,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<Source, Target> OctetsInto<Target> for Source
where Target: OctetsFrom<Source>,

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type Error = <Target as OctetsFrom<Source>>::Error

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fn try_octets_into( self, ) -> Result<Target, <Source as OctetsInto<Target>>::Error>

Performs the conversion.
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fn octets_into(self) -> Target
where Self::Error: Into<Infallible>,

Performs an infallible conversion.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more