About

The libmaxminddb library provides a C library for reading MaxMind DB files, including the GeoIP2 databases from MaxMind. This is a custom binary format designed to facilitate fast lookups of IP addresses while allowing for great flexibility in the type of data associated with an address.

The MaxMind DB format is an open format. The spec is available at http://maxmind.github.io/MaxMind-DB/. This spec is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License.

See http://dev.maxmind.com/ for more details about MaxMind's GeoIP2 products.

License

This library is licensed under the GNU Lesser General Public License v. 2.1.

Installing from a Tarball

This code is known to work with GCC 4.4+ and clang 3.2+. It should also work on other compilers that supports C99, POSIX 2011.11, and the -fms-extensions flag (or equivalent). The latter is needed to allow an anonymous union in a structure.

To install this code, run the following commands:

$ ./configure
$ make
$ make check
$ make install

You can skip the make check step but it's always good to know that tests are passing on your platform.

The configure script takes the standard options to set where files are installed such as --prefix, etc. See ./configure --help for details.

Installing from the Git Repository

Our public git repository is hosted on GitHub at https://github.com/maxmind/libmaxminddb

You can clone this repository and build it by running:

$ git clone --recursive https://github.com/maxmind/libmaxminddb
$ ./bootstrap
$ ./configure
$ make check

To install from Git, you will need automake, autoconf, and libtool installed in addition to make and a compiler.

Bug Reports

Please report bugs by filing an issue with our GitHub issue tracker at https://github.com/maxmind/libmaxminddb/issues

Dev Tools

We have a few development tools under the dev-bin directory to make development easier. These are written in Perl or shell. They are:

regen-prototypes.pl - This regenerates the prototypes in the header and source files. This helps keep headers and code in sync.
uncrustify-all.sh - This runs uncrustify on all the code. It runs regen-prototypes.pl first. Please run this before submitting patches.
valgrind-all.pl - This runs Valgrind on the tests and mmdblookup to check for memory leaks.

Copyright and License

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA