Struct OuiDb 

pub struct OuiDb { /* private fields */ }

In-memory OUI database backed by locally cached IEEE CSV files.

Implementations

impl OuiDb

pub fn new(data_dir: &Path) -> Self

Creates a new OuiDb pointing at data_dir for cached CSV files.

pub fn age(&self) -> Option<SystemTime>

Returns the modification time of the oldest cached CSV file, or None if any file is missing or its mtime is unavailable.

pub fn load_data(&mut self) -> Result<()>

Loads all cached CSV files into the in-memory lookup table.

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

Downloads fresh OUI data from all IEEE sources and writes them to data_dir.

Trait Implementations

impl Oui for OuiDb

fn lookup(&self, mac: MacAddr) -> Option<OuiData>

Retrieve the OUI record for a given MAC address.

IEEE assigns OUI prefixes at three granularities:

• MA-L (MAC Address Large, oui.csv): 24-bit prefix → 6 hex chars
• MA-M (MAC Address Medium, mam.csv): 28-bit prefix → 7 hex chars
• MA-S (MAC Address Small, oui36.csv/iab.csv): 36-bit prefix → 9 hex chars

We try the most-specific prefix first so that a narrower assignment (e.g. MA-S) takes precedence over a broader one (e.g. MA-L) for the same MAC address.