Struct domain::base::opt::cookie::ClientCookie

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pub struct ClientCookie(/* private fields */);
Expand description

A client cookie for DNS cookies.

The client cookies consists of exactly 8 octets. It is generated by a client for each server it sends queries to. It is important to use a different cookie for every server so a server cannot spoof answers for other servers.

Originally, it was suggested to include the client’s IP address when generating the cookie, but since the address may not be known when originating a request, this has been relaxed and it is now suggested that the cookies is just random data. If the rand feature is enabled, the new new_random constructor can be used to generate such a random cookie. Otherwise, it needs to be created from the octets via from_octets. Similarly, the Default implementation will create a random cookie and is thus only available if the rand feature is enabled.

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impl ClientCookie

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pub const fn from_octets(octets: [u8; 8]) -> Self

Creates a new client cookie from the given octets.

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pub fn new_random() -> Self

Creates a new random client cookie.

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pub fn into_octets(self) -> [u8; 8]

Converts the cookie into its octets.

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

Parses a client cookie from its wire format.

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pub const COMPOSE_LEN: u16 = 8u16

The length of the wire format of a client cookie.

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

Appends the wire format of the client cookie to the target.

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impl AsMut<[u8]> for ClientCookie

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fn as_mut(&mut self) -> &mut [u8]

Converts this type into a mutable reference of the (usually inferred) input type.
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impl AsRef<[u8]> for ClientCookie

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fn as_ref(&self) -> &[u8]

Converts this type into a shared reference of the (usually inferred) input type.
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impl Clone for ClientCookie

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fn clone(&self) -> ClientCookie

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 ClientCookie

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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 Default for ClientCookie

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl Display for ClientCookie

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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 From<[u8; 8]> for ClientCookie

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fn from(src: [u8; 8]) -> Self

Converts to this type from the input type.
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impl From<ClientCookie> for [u8; 8]

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fn from(src: ClientCookie) -> Self

Converts to this type from the input type.
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impl Hash for ClientCookie

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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 ClientCookie

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fn cmp(&self, other: &ClientCookie) -> 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 for ClientCookie

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

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

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fn partial_cmp(&self, other: &ClientCookie) -> 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

This method 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

This method 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

This method 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

This method 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 ClientCookie

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impl Eq for ClientCookie

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impl StructuralPartialEq for ClientCookie

Auto Trait Implementations§

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> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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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