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/*
This file is part of GNUnet.
Copyright (C) 2009, 2015 Christian Grothoff (and other contributing authors)
GNUnet 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, or (at your
option) any later version.
GNUnet 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 GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* This code is based on ministun.c, that is based on Asterisk old STUN code.
* This code provides some support for doing STUN transactions.
* The simplest request packet is just the header defined in
* struct stun_header, and from the response we may just look at
* one attribute, STUN_MAPPED_ADDRESS, that we find in the response.
* By doing more transactions with different server addresses we
* may determine more about the behaviour of the NAT boxes, of
* course - the details are in the RFC.
*
* All STUN packets start with a simple header made of a type,
* length (excluding the header) and a 16-byte random transaction id.
* Following the header we may have zero or more attributes, each
* structured as a type, length and a value (whose format depends
* on the type, but often contains addresses).
* Of course all fields are in network format.
*
*
* @file nat/nat_stun.c
* @brief Testcase for STUN library
* @author Bruno Souza Cabral
*/
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