mmgeoip Module

Kobi Eshun

SightSpeed, Inc.

Edited by

Kobi Eshun

Revision History
Revision $Revision: 5901 $$Date$

Table of Contents

1. Admin Guide
1.1. Overview
1.2. Dependencies
1.2.1. OpenSIPS Modules
1.2.2. External Libraries or Applications
1.3. Exported Parameters
1.3.1. mmgeoip_city_db_path (string)
1.3.2. cache_type (string)
1.4. Exported Functions
1.4.1. mmg_lookup([fields,]src,dst)
1.5. Known Issues

List of Examples

1.1. Set “mmgeoip_city_db_path” parameter
1.2. Set “cache_type” parameter
1.3. mmg_lookup usage

Chapter 1. Admin Guide

1.1. Overview

This module is a lightweight wrapper for the MaxMind GeoIP API. It adds IP address-to-location lookup capability to OpenSIPS scripts.

Lookups are executed against the freely-available GeoLite City database; and the non-free GeoIP City database is drop-in compatible. All lookup fields provided by the API are accessible by the script. Visit the MaxMind website for more information on the location databases.

1.2. Dependencies

1.2.1. OpenSIPS Modules

The following modules must be loaded before this module:

  • No dependencies on other OpenSIPS modules.

1.2.2. External Libraries or Applications

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

  • libGeoIP.

1.3. Exported Parameters

1.3.1. mmgeoip_city_db_path (string)

Path to either a GeoLite or GeoIP City database file.

Mandatory parameter.

Example 1.1. Set “mmgeoip_city_db_path” parameter

modparam("mmgeoip", "mmgeoip_city_db_path",

1.3.2. cache_type (string)

Databse memory caching options. The following options are available:

  • STANDARD - Read database from file system; least memory used;

  • MMAP_CACHE - Load database into mmap allocated memory;

    WARNING: this option will cause a segmentation fault if database file is changed at runtime!

  • MEM_CACHE_CHECK - Load database into memory; this mode checks for database updates; if database was modified, the file will be reloaded after 60 seconds; it will be slower than MMAP_CACHE but it will allow reloads;

Default value for this parameter is MMAP_CACHE.

Example 1.2. Set “cache_type” parameter

modparam("mmgeoip", "cache_type","MEM_CACHE_CHECK")

1.4. Exported Functions

1.4.1.  mmg_lookup([fields,]src,dst)

Looks up specified fields associated with IP address specified by the src. The resulting data are loaded in reverse order into the dst AVP.

src can be a pseudo-variable or AVP; and dst must be an AVP. fields defaults to "lon:lat," and is a colon-delimited list of these elements:

  • lat Latitude

  • lon Longitude

  • cont Continent

  • cc Country Code

  • reg Region

  • city City

  • pc Postal Code

  • dma DMA Code

  • ac Area Code

  • TZ Time Zone


Example 1.3. mmg_lookup usage

if(mmg_lookup("lon:lat","$si","$avp(lat_lon)")) {
  xlog("L_INFO","Source IP latitude:$(avp(lat_lon)[0])\n");
  xlog("L_INFO","Source IP longitude:$(avp(lat_lon)[1])\n");

1.5. Known Issues

It is not currently possible to load an updated location database without first stalling the server.