Unless otherwise stated, all files are licensed under the GPLv3 license:

Copyright (C) 2016, Communication Networks, University of Bremen, Germany

This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; version 3 of the License.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, see <http://www.gnu.org/licenses/>

The complete license can be found at gnu.org/licenses/gpl-3.0