Method parse

nodedb/src/control/security/jwks/url.rs:197–215

Parse a CIDR like `"10.42.0.0/16"` or `"fd00::/8"`. Returns `None` if the input doesn't match `IP/prefix` with a valid prefix width.

(s: &str)

    /// Parse a CIDR like `"10.42.0.0/16"` or `"fd00::/8"`. Returns `None`
    /// if the input doesn't match `IP/prefix` with a valid prefix width.
    pub fn parse(s: &str) -> Option<Self> {
        let (ip_str, prefix_str) = s.split_once('/')?;
        let prefix: u8 = prefix_str.parse().ok()?;
        let ip: IpAddr = ip_str.parse().ok()?;
        let (bits, is_v4) = match ip {
            IpAddr::V4(v4) => (u32::from(v4) as u128, true),
            IpAddr::V6(v6) => (u128::from(v6), false),
        };
        let width: u8 = if is_v4 { 32 } else { 128 };
        if prefix > width {
            return None;
        }
        let mask = build_mask(prefix, is_v4);
        Some(Self {
            base: bits & mask,
            mask,
            is_v4,
        })
    }

    /// Does this CIDR contain `ip`?
    pub fn contains(&self, ip: &IpAddr) -> bool {