maxmouchet / goasn

Fast offline lookup of IP addresses to IXP and AS numbers from RIB archives.

goasn

goasn provides fast lookup of IP addresses to IXP and AS numbers from RIB archives.
It supports the following sources:

• Route Views/RIS MRT format RIBs
• PeeringDB data
• pyasn data files

It reads and store IP addresses in a radix tree (kentik/patricia) for fast lookups.

It supports multiple origin ASes in opposition to pyasn (pyasn#46).

WIP. The API is not stable

Quick Start

CLI

You can download the latest binary or build goasn by yourself.
Building meshmon requires Go 1.12+.

git clone https://github.com/maxmouchet/goasn.git
cd goasn; make

goasn download --collector route-views.amsix.routeviews.org --date 2019-08-01T08:00
goasn convert rib.20190801.0800.bz2
goasn lookup --db rib.20180801.0800.txt 8.8.8.8

Library

go get github.com/maxmouchet/goasn

asndb, _ := goasn.NewDB("rib.20180801.0800.txt")

asn, _ := asndb.LookupStr("8.8.8.8")
// => 15169

ip := net.ParseIP("1.1.1.1")
asn, _ := asndb.LookupIP(ip)
// => 13335

Performance

Constructing the radix tree is slower than pyasn, but lookups are faster.

# benchmark.go
Loading database from ipasn_20190822.dat...
Took 1.719656297s

Looking up 10000 addresses (string)
Took 3.367572ms

Looking up 10000 addresses (net.IP)
Took 1.631176ms

# benchmark.py
Loading database from ipasn_20190822.dat
Took 197.402488ms

Looking up 10000 addresses (string)
Took 9.340981ms