geoip2 Module

Sergey Okhapkin

callwithus.com

Edited by

Daniel-Constantin Mierla

Henning Westerholt

gilawa.com

Table of Contents

1. Admin Guide
1. Overview
2. Dependencies
2.1. Kamailio Modules
2.2. External Libraries or Applications
3. Parameters
3.1. path (string)
4. Functions
4.1. geoip2_match(ipaddr, pvc)
5. RPC Commands
5.1. geoip2.reload
6. Exported pseudo-variables

List of Examples

1.1. Set path parameter
1.2. geoip2_match usage
1.3. geoip2.reload usage

Chapter 1. Admin Guide

1. Overview

This module allows real-time queries against the Max Mind GeoIP2 database to be performed from the config script.

The Max Mind GeoIP2 database is a map of IP network address assignments to geographical locales that can be useful -- though approximate -- in identifying the physical location with which an IP host address is associated on a relatively granular level.

This database itself can be obtained on a free or commercial basis from http://dev.maxmind.com/geoip/. The library libmaxminddb that interfaces with the Max Mind API, as well as scripts to automate downloading of the on-disk version are available at http://dev.maxmind.com/geoip/geoip2/downloadable/.

This module exports a new class of pseudo-variables - $gip2(pvc=>key) - to enable access to the results of a query to the database.

Many queries can be done and store results in different containers to be able to use in parallel. Database is loaded at startup in cache. The cache can be reloaded with an RPC command. In this case make sure that you do not overwrite the file in place, but replace it, e.g. with a move command.

2. Dependencies

2.1. Kamailio Modules

The following modules must be loaded before this module:

  • none.

2.2. External Libraries or Applications

The following libraries or applications must be installed before running Kamailio with this module loaded:

  • libmaxminddb - the GeoIP2 library.

3. Parameters

3.1. path (string)

Path to the GeoIP2 database file.

Default value is null.

Example 1.1. Set path parameter

...
modparam("geoip2", "path", "/usr/local/share/GeoIP/GeoLite2-City.mmdb")
...

4. Functions

4.1.  geoip2_match(ipaddr, pvc)

Match ipaddr against the GeoIP database and set the pvc container. The function has to be called before accessing a key via: $gip2(pvc=>key). At least one function needs to be present that access the pvc container, otherwise this function will not work.

Example 1.2. geoip2_match usage

...
if(geoip2_match("$si", "src"))
    xlog("SIP message from: $gip2(src=>cc)\n");
...

5. RPC Commands

5.1.  geoip2.reload

Reload the internal GeoIP database. This is necessary after the database file has been changed on the disk.

Example 1.3. geoip2.reload usage

...
kamcmd geoip2.reload
...

6. Exported pseudo-variables

  • $gip2(pvc=>key) - pvc is an identifier for this query result; it is designated by the second parameter of geoip2_match(). The key can be one of the following:

    • cc - country code

    • tz - time zone

    • zip - postal code

    • lat - latitude

    • lon - longitude

    • nmask - network mask (CIDR format)

    • city - city

    • regc - region

    • regn - region name

    • metro - metro code

    • contc - continent code

Exported pseudo-variables are documented at https://www.kamailio.org/wiki/.