IPv4 lookup in maxmind's CSVs.

1. Build with

mvn clean compile assembly:single

2. Download CSVs from

https://dev.maxmind.com/geoip/geoip2/geolite2/

3. Pass GeoLite2-City-Blocks-IPv4.csv GeoLite2-City-Locations-en.csv files' paths as the application cmd parameters.

e.g. assuming you're located in the project's folder:

cd target && java -jar iplookup-1.0.jar ~/tools/GeoLite2-City-CSV_20171205/GeoLite2-City-Blocks-IPv4.csv ~/tools/GeoLite2-City-CSV_20171205/GeoLite2-City-Locations-en.csv

The sample files are provided in the resources folder.

4. Supply the needed IP addresses into the STDIN.