asnutil

README

go-libp2p-asn-util

A library to lookup the ASN(Autonomous System Number) for an IP address. It uses the IPv6 to ASN database downloaded from https://iptoasn.com/. Supports ONLY IPv6 addresses for now.

Table of Contents

• Install
• Usage
• Documentation
• Contribute
• License

Install

go get github.com/libp2p/go-libp2p-asn-util

Usage

import (
    asn "github.com/libp2p/go-libp2p-asn-util"
)

func main() {
   store, err := asn.NewAsnStore()

   asNumber,err := store.AsnForIP(net.ParseIP("2a03:2880:f003:c07:face:b00c::2"))
 }

Contribute

Feel free to join in. All welcome. Open an issue!

This repository falls under the IPFS Code of Conduct.

License

MIT

---

Documentation

Overview

Package asnutil provides a mapping lookup for IPv6 ASNs.

Index

• Variables
• func AsnForIPv6(ip net.IP) (asn uint32)
• func AsnForIPv6Network(network uint64) (asn uint32)

Variables

var Store backwardCompat

Deprecated: use AsnForIPv6 or AsnForIPv6Network, they do not allocate.

Functions

func AsnForIPv6

func AsnForIPv6(ip net.IP) (asn uint32)

AsnForIPv6 returns the AS number for the given IPv6 address. If no mapping exists for the given network, this function will return a zero ASN number.

func AsnForIPv6Network

func AsnForIPv6Network(network uint64) (asn uint32)

AsnForIPv6Network returns the AS number for the given IPv6 network. If no mapping exists for the given network, this function will return a zero ASN number. network is the first 64 bits of the ip address interpreted as big endian.