SoftwareLicensing » History » Version 6
laforge, 03/06/2016 05:36 AM
h1. Software Licensing
In general, each of the Osmocom projects contains a @COPYING@ file in the soure code, containing the detailed software license of the respective project. Please make sure to understand the license terms before using the software!
h2. AGPLv3+: Most Osmocom Cellular infrastructure software, such as [[OpenBSC:]]
The following notes apply to software described on this wiki, developed as part of the Osmocom project. Specifically, it applies to [[OpenBSC:]], [[OsmoNITB:]], [[OsmoSGSN:]], [[OsmoBTS:]], gb_proxy, ipaccess-config, bsc_nat, osmo-bsc_mgcp, ...
For reasons of simplicity, we always call it _OpenBSC_ here.
*OpenBSC is copyrighted software like any other computer program. In order to use [[OpenBSC:]], you need a license from the copyright holders.*
If you do not arrange for a different license with the copyright holders, the software ships with a default license: The "AGPLv3":http://fsf.org/licenses/agpl-3.0.html (GNU Affero General Public License, Version 3).
h3. General idea behind the AGPLv3 Licensing
The general idea behind our licensing model is as follows: You receive the full source code of the [[OpenBSC:]] software and can use it like you see fit, *but* we require you to release the source code of any modifications or derivative work you create.
With AGPL, it does not matter whether you ever distribute the [[OpenBSC:]] software. As soon as you provide a GSM network using [[OpenBSC:]], all users are entitled to receive a copy of the license text and the _complete corresponding source code_ of the very version you are using to run the GSM network with.
h2. GPLv2+: libosmocore, [[OsmoPCU:]]
[[libosmocore:]] (and its siblings @libosmogsm@, @libosmovty@, @libosmoctrl@, etc.) as well as [[OsmoPCU:]] are licensed under "GNU GPL Version 2, or any later version". This means at the time of this writing, you can license them under either "GPLv2":http://www.gnu.org/licenses/gpl-2.0.html or "GPLv3":http://www.gnu.org/licenses/gpl-3.0.html.
As both GPLv2 and GPLv3 are _strong copyleft_ licenses, it means that creating a derivative work of the library and an executable program will require that executable program to be under the same GPL version.
If you use the libraries together with the Osmocom executable programs (see above), then libosmocore will be licensed under GPLv3, which is compatible with the AGPLv3 of the executable programs.
If you have any questions regarding the licenses used in the Osmocom project, please contact the project authors *before* you create any kind of product or a derivative work.