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CarpAdvertisement

netget::server::vrrp::codec

Struct CarpAdvertisement 

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pub struct CarpAdvertisement {
    pub version: u8,
    pub vhid: u8,
    pub advskew: u8,
    pub auth_length_words: u8,
    pub demote: u8,
    pub advbase: u8,
    pub counter: u64,
    pub hmac: [u8; 20],
    pub checksum: u16,
}
Expand description

One CARP advertisement (OpenBSD struct carp_header).

CARP is not VRRP. It shares only the IP protocol number. There is no CARP RFC; the layout below is taken from OpenBSD’s sys/netinet/ip_carp.h:

 0      version(4) | type(4)   = 0x21 — the same first octet as a VRRPv2 advertisement
 1      carp_vhid                virtual host id
 2      carp_advskew             advertisement skew; LOWER WINS, the inverse of VRRP
 3      carp_authlen             32-bit words of counter + HMAC, always 7
 4      carp_demote              demotion counter
 5      carp_advbase             advertisement base interval, whole seconds
 6.. 8  carp_cksum               one's-complement checksum over these 36 octets
 8..16  carp_counter             64-bit replay counter, big-endian on the wire
16..36  carp_md                  HMAC-SHA1

The election runs on advbase + advskew/256 seconds: the host that advertises soonest wins, so a lower skew is stronger. That is the opposite direction from VRRP’s priority, and it is the single easiest thing to get backwards when treating the two as one protocol.

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§version: u8§vhid: u8§advskew: u8§auth_length_words: u8§demote: u8§advbase: u8§counter: u64§hmac: [u8; 20]§checksum: u16

The checksum as it appeared on the wire; ignored by Self::encode.

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impl CarpAdvertisement

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pub fn interval_seconds(&self) -> f64

The advertisement interval this host is claiming, in seconds.

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pub fn validate(&self) -> Result<()>

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pub fn encode(&self) -> Result<Vec<u8>>

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pub fn decode(data: &[u8]) -> Result<Self>

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impl Clone for CarpAdvertisement

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fn clone(&self) -> Self

Returns a duplicate 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 CarpAdvertisement

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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 Eq for CarpAdvertisement

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impl PartialEq for CarpAdvertisement

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

Equality operator ==. Read more
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fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl StructuralPartialEq for CarpAdvertisement

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fn clear(&self) -> Painted<&T>

👎Deprecated since 1.0.1:

renamed to resetting() due to conflicts with Vec::clear(). The clear() method will be removed in a future release.

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fn resetting(&self) -> Painted<&T>

Returns self with the quirk() set to [Quirk :: Resetting].

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fn whenever(&self, value: Condition) -> Painted<&T>

Conditionally enable styling based on whether the Condition value applies. Replaces any previous condition.

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fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R
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Borrows self and passes that borrow into the pipe function. Read more
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Mutably borrows self and passes that borrow into the pipe function. Read more
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Borrows self, then passes self.as_ref() into the pipe function.
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Mutably borrows self, then passes self.as_mut() into the pipe function.
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Borrows self, then passes self.deref() into the pipe function.
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Mutably borrows self, then passes self.deref_mut() into the pipe function.
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const ALIGN: usize

The alignment of pointer.
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Create a new Policy that returns Action::Follow only if self and other return Action::Follow. Read more
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Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more
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type Output = T

Should always be Self
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Consumes the current HList and returns an HList with the requested shape. Read more
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fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more
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fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self

Mutable access to a value. Read more
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fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self
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Immutable access to the Borrow<B> of a value. Read more
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Mutable access to the BorrowMut<B> of a value. Read more
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fn tap_ref<R>(self, func: impl FnOnce(&R)) -> Self
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Immutable access to the AsRef<R> view of a value. Read more
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Mutable access to the AsMut<R> view of a value. Read more
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Immutable access to the Deref::Target of a value. Read more
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fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self

Calls .tap() only in debug builds, and is erased in release builds.
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Calls .tap_mut() only in debug builds, and is erased in release builds.
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Calls .tap_borrow() only in debug builds, and is erased in release builds.
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Calls .tap_borrow_mut() only in debug builds, and is erased in release builds.
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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
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Calls .tap_ref() only in debug builds, and is erased in release builds.
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
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Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
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Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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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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Uses borrowed data to replace owned data, usually by cloning. Read more
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Attempts to convert self into T using TryInto<T>. Read more
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impl<T, U> TryFrom<U> for T
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type Error = !

The type returned in the event of a conversion error.
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Performs the conversion.
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Performs the conversion.
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The type returned in the event of a conversion error.
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Performs the conversion.
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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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