lwIP 2.2.0, the networking software included in ChippyOS, with Espressif's changes (Espressif Systems (Shanghai) CO LTD, 2015-2025). Its copyright notices and license follow. Copyright (c) 2001, 2002 Swedish Institute of Computer Science. Copyright (c) 2001-2004 Swedish Institute of Computer Science. Copyright (c) 2001-2003 Swedish Institute of Computer Science. Copyright (c) 2001 Swedish Institute of Computer Science. Copyright (c) 2018 Swedish Institute of Computer Science. uIP version Copyright (c) 2002-2003, Adam Dunkels. (DNS) Copyright (c) 2001-2004 Leon Woestenberg Copyright (c) 2003-2004 Leon Woestenberg Copyright (c) 2001-2004 Axon Digital Design B.V., The Netherlands. Copyright (c) 2003-2004 Axon Digital Design B.V., The Netherlands. Copyright (c) 2010 Inico Technologies Ltd. Copyright (c) 2007-2009 Frédéric Bernon, Simon Goldschmidt Copyright (c) 2017 Simon Goldschmidt Copyright (c) 2018 Simon Goldschmidt Copyright (c) 2016 The MINIX 3 Project. Copyright (c) 2017 The MINIX 3 Project. Copyright (c) 2007 Dominik Spies Copyright (c) 2018 Jasper Verschueren Copyright (c) 2017 Dirk Ziegelmeier. Copyright (c) 2017 Joel Cunningham, Garmin International, Inc. All rights reserved. The netdb API (netdb.c and netdb.h), by Simon Goldschmidt, carries the same license with no copyright line of its own. All of these files, except the IGMP files below, carry this license, as in lwIP's own COPYING file: 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. The name of the author may not be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. The IGMP files (igmp.c and igmp.h) carry their own notice and license, verbatim: Copyright (c) 2002 CITEL Technologies Ltd. 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 CITEL Technologies Ltd 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 CITEL TECHNOLOGIES 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 CITEL TECHNOLOGIES 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. This file is a contribution to the lwIP TCP/IP stack. The Swedish Institute of Computer Science and Adam Dunkels are specifically granted permission to redistribute this source code.