Copyright (c) 2010--2023, Olaf Bergmann and others
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:

  o Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.

  o Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in
    the documentation and/or other materials provided with the
    distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

========================================================================
getopt.c

License information for getopt.c. This file is only used on Windows
builds of the executables in the examples folder:

/*
 * This file was copied from the following newsgroup posting:
 *
 * Newsgroups: mod.std.unix
 * Subject: public domain AT&T getopt source
 * Date: 3 Nov 85 19:34:15 GMT
 *
 * Here's something you've all been waiting for:  the AT&T public domain
 * source for getopt(3).  It is the code which was given out at the 1985
 * UNIFORUM conference in Dallas.  I obtained it by electronic mail
 * directly from AT&T.  The people there assure me that it is indeed
 * in the public domain.
 */

========================================================================
uthash

libcoap uses uthash.h and utlist.h from Troy D. Hanson
(https://troydhanson.github.io/uthash/). These files use the revised
BSD license (BSD-1-Clause license) as included in these two source
files.  These files are named coap_uthash_internal.h and
coap_utlist_internal.h respectively to make sure the correct versions
are included.

========================================================================
oscore cose

Copyright (c) 2018, SICS, RISE AB
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
3. Neither the name of the Institute nor the names of its contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.

========================================================================
OpenSSL

Binaries that are linked against OpenSSL include software developed
by the OpenSSL Project for use in the OpenSSL Toolkit.
(http://www.openssl.org/). Please consult the OpenSSL license
(https://www.openssl.org/source/license.html) for licensing terms.

========================================================================
GnuTLS

When compiled with GnuTLS support, this software includes components
that are licensed under the terms of the the GNU Lesser General Public
License, version 2.1
(https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html).

========================================================================
tinyDTLS

When compiled with tinyDTLS support, this software includes components
that are licensed under the terms of the Eclipse Distribution License 1.0
(http://www.eclipse.org/org/documents/edl-v10.php).

========================================================================
Mbed TLS

When compiled with Mbed TLS support, this software includes components
that are licensed under the terms of the Apache 2.0 license
(http://www.apache.org/licenses/LICENSE-2.0).

========================================================================
RIOT

When compiled with RIOT support, this software includes components
that are licensed under the terms of the the GNU Lesser General Public
License, version 2.1
(https://raw.githubusercontent.com/RIOT-OS/RIOT/master/LICENSE).