=====================
Copyright and License
=====================

Copyright © 2011-2015 University of California, Los Angeles

ndnSIM is licensed under conditions of GNU General Public License version 3.0 or later
with permission to be linked with NS-3 codebase (GPL 2.0).

ndnSIM uses a number of third-party software and libraries, licensed under the following
licenses:

- Boost libraries licensed under conditions of `Boost Software License 1.0`_

- CryptoPP library is licensed under conditions of `Boost Software License 1.0`_

- SQLite is in `public domain <http://www.sqlite.org/copyright.html>`__

- waf build system is licensed under conditions of `BSD license
  <https://github.com/named-data/ndn-cxx/blob/master/waf>`__

- ndn-cxx library licensed under conditions of `GNU LGPL 3.0+
  <https://github.com/named-data/ndn-cxx/blob/master/COPYING.md>`__

- NDN Forwarding Daemon (NFD) licensed under conditions of `GNU GPL 3.0+
  <https://github.com/named-data/NFD/blob/master/COPYING.md>`__
  
ndnSIM also relies on several other third-party libraries with non-GPL compatible
license. These library fall into category of "System Libraries" under GPL license
definitions and are used in accordance with GPL license exception for "System Libraries":

The GPL license is provided below in this file. For more information about these licenses,
see `<http://www.gnu.org/licenses/>`__

.. _Boost Software License 1.0 : http://www.boost.org/users/license.html

----------------------------------------------------------------------------------

GNU GENERAL PUBLIC LICENSE
==========================

Version 3, 29 June 2007
=======================

    Copyright (C) 2007 Free Software Foundation, Inc. http://fsf.org/ Everyone is permitted to copy
    and distribute verbatim copies of this license document, but changing it is not allowed.

Preamble
========

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TERMS AND CONDITIONS
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12. No Surrender of Others' Freedom.
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15. Disclaimer of Warranty.
---------------------------

THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
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16. Limitation of Liability.
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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR
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17. Interpretation of Sections 15 and 16.
-----------------------------------------

If the disclaimer of warranty and limitation of liability provided above cannot be given local legal
effect according to their terms, reviewing courts shall apply local law that most closely
approximates an absolute waiver of all civil liability in connection with the Program, unless a
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# END OF TERMS AND CONDITIONS
-----------------------------

How to Apply These Terms to Your New Programs
=============================================

If you develop a new program, and you want it to be of the greatest possible use to the public, the
best way to achieve this is to make it free software which everyone can redistribute and change
under these terms.

To do so, attach the following notices to the program. It is safest to attach them to the start of
each source file to most effectively state the exclusion of warranty; and each file should have at
least the "copyright" line and a pointer to where the full notice is found.

::

    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>

    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, either version 3 of the License, or
    (at your option) any later version.

    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/>.

Also add information on how to contact you by electronic and paper mail.

If the program does terminal interaction, make it output a short notice like this when it starts in
an interactive mode:

::

    <program>  Copyright (C) <year>  <name of author>
    This program comes with ABSOLUTELY NO WARRANTY; for details type 'show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type 'show c' for details.

The hypothetical commands *'show w'* and *'show c'* should show the appropriate parts of the General
Public License. Of course, your program's commands might be different; for a GUI interface, you
would use an "about box".

You should also get your employer (if you work as a programmer) or school, if any, to sign a
"copyright disclaimer" for the program, if necessary. For more information on this, and how to apply
and follow the GNU GPL, see http://www.gnu.org/licenses/.

The GNU General Public License does not permit incorporating your program into proprietary programs.
If your program is a subroutine library, you may consider it more useful to permit linking
proprietary applications with the library. If this is what you want to do, use the GNU Lesser
General Public License instead of this License. But first, please read
http://www.gnu.org/philosophy/why-not-lgpl.html.