Struct Pfx2as

pub struct Pfx2as { /* private fields */ }

A data structure for performing prefix-to-ASN mappings.

The Pfx2as struct uses an internal trie to organize IP prefixes and their associated Autonomous System Numbers (ASNs). It provides functionality for loading prefix-to-ASN mappings from a source file and methods for performing exact and longest prefix matches.

Features

• Load prefix-to-ASN mappings from a JSON data source (pfx2as-latest.json.bz2).
• Perform exact match lookups with the lookup_exact method.
• Perform longest prefix match (LPM) lookups with the lookup_longest method.

Implementations

impl Pfx2as

pub fn new(path_opt: Option<String>) -> Result<Pfx2as>

pub fn lookup_exact(&self, prefix: IpNet) -> Vec<u32>

Look up exact matches for the given IP prefix.

This method searches for prefixes in the trie that exactly match the given prefix. If a match is found, it returns a vector containing ASNs associated with the matching prefix. If no match is found, an empty vector is returned.

Arguments

• prefix - An IpNet object representing the IP prefix to be matched.

Returns

A Vec<u32> containing ASNs associated with the matching prefix. If no exact matching prefix is found, the returned vector will be empty.

pub fn lookup_longest(&self, prefix: IpNet) -> Vec<u32>

Perform the longest prefix match (LPM) for the given IP prefix.

This method finds the most specific prefix in the trie that matches the given IP prefix. It returns a list of ASNs associated with the longest matching prefix, if any exists.

Arguments

• prefix - An IpNet object representing the IP prefix to be matched.

Returns

A Vec<u32> containing ASNs associated with the longest matching prefix. If no matching prefix is found, the returned vector will be empty.