Enum Mechanism 

pub enum Mechanism {
    All {
        qualifier: Qualifier,
    },
    Ip4 {
        qualifier: Qualifier,
        addr: Ipv4Addr,
        prefix: u8,
    },
    Ip6 {
        qualifier: Qualifier,
        addr: Ipv6Addr,
        prefix: u8,
    },
    A {
        qualifier: Qualifier,
        domain: Option<String>,
        ip4_prefix: u8,
        ip6_prefix: u8,
    },
    Mx {
        qualifier: Qualifier,
        domain: Option<String>,
        ip4_prefix: u8,
        ip6_prefix: u8,
    },
    Include {
        qualifier: Qualifier,
        domain: String,
    },
    Exists {
        qualifier: Qualifier,
        domain: String,
    },
}

One SPF mechanism (RFC 7208 §5).

Each mechanism carries its Qualifier and the mechanism-specific payload.

Variants

All

all — matches every IP.

Fields

qualifier: Qualifier

Qualifier applied on match.

Ip4

ip4:1.2.3.4 or ip4:1.2.3.0/24 — matches IPv4 in the specified network.

Fields

qualifier: Qualifier

Qualifier applied on match.

addr: Ipv4Addr

Network base address.

prefix: u8

Prefix length (1-32). 32 if not specified in the record.

Ip6

ip6:2001:db8::1 or ip6:2001:db8::/32 — matches IPv6.

Fields

qualifier: Qualifier

Qualifier applied on match.

addr: Ipv6Addr

Network base address.

prefix: u8

Prefix length (1-128). 128 if not specified in the record.

A

a or a:example.com or a:example.com/24.

Fields

qualifier: Qualifier

Qualifier applied on match.

domain: Option<String>

Domain to look up (default = current domain in scope).

ip4_prefix: u8

IPv4 prefix length (default 32).

ip6_prefix: u8

IPv6 prefix length (default 128).

Mx

mx or mx:example.com.

Fields

qualifier: Qualifier

Qualifier applied on match.

domain: Option<String>

Domain whose MX records to look up.

ip4_prefix: u8

IPv4 prefix length (default 32).

ip6_prefix: u8

IPv6 prefix length (default 128).

Include

include:example.com — recurse into another domain’s SPF.

Fields

qualifier: Qualifier

Qualifier applied on match.

domain: String

Included domain to resolve recursively.

Exists

exists:%{ir}.example.com — match if the lookup returns ANY A.

Fields

qualifier: Qualifier

Qualifier applied on match.

domain: String

Domain template to look up. Macro expansion is out of v1.0 scope; the literal template is used as-is.

Implementations

impl Mechanism

pub fn qualifier(&self) -> Qualifier

Qualifier accessor (every variant has one).

Trait Implementations

impl Clone for Mechanism

fn clone(&self) -> Mechanism

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Mechanism

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

Formats the value using the given formatter.

impl PartialEq for Mechanism

fn eq(&self, other: &Mechanism) -> 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 Eq for Mechanism

impl StructuralPartialEq for Mechanism