Enum LookupPolicy 

pub enum LookupPolicy {
    RouterAndKey,
    KeyFirst,
}

How a request reaches a lookup record (LookupInfo.policy, spec §9.5.2).

Variants

RouterAndKey

router_and_key (the default, also when the field is absent): the φ router sends the request to the record, the table then looks the key up in it; a request the router sent to the backbone never reaches the table.

KeyFirst

key_first: a STRONG key in the message (is_strong_key) sends the request to the record even when the router picked the backbone (the backbone nearest, a novel input, the margin not beaten); a one-word key still needs the router’s decision.

Implementations

impl LookupPolicy

pub fn parse(s: &str) -> Result<Self, String>

router_and_key | key_first.

pub fn of(info: &LookupInfo) -> Self

The policy a record declares (LookupInfo::policy_label). A value this reader does not know (a newer writer’s policy, a hand edit) is router_and_key — the conservative reading, the one a reader from before the field existed applies — and never a reason to refuse the file (review KF-6; CmfModel::open warns once, the writers lookup-build / lookup-policy refuse such a value).

pub fn is_known(info: &LookupInfo) -> bool

Does the record declare a policy this reader knows (absent = the default, known)?

pub fn label(self) -> &'static str

Trait Implementations

impl Clone for LookupPolicy

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for LookupPolicy

impl Debug for LookupPolicy

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

Formats the value using the given formatter.

impl Default for LookupPolicy

fn default() -> Self

Returns the “default value” for a type.

impl Eq for LookupPolicy

impl PartialEq for LookupPolicy

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for LookupPolicy