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Olaf Bergmann
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In case the ACK of a separate message is lost, the request would be retransmitted until the maximum number of transmissions is reached because the response usually has a different messsage id. The matching at this point is done based on the response's source address and token.
libcoap: A C implementation of IETF Core Application protocol Copyright (C) 2010--2013 by Olaf Bergmann <bergmann@tzi.org> ABOUT LIBCOAP libcoap is a C implementation of a lightweight application-protocol for devices that are constrained their resources such as computing power, RF range, memory, bandwith, or network packet sizes. This protocol, CoAP, is developed in the IETF working group "Constrained RESTful Environments (core)", see <http://6lowapp.net>. PACKAGE CONTENTS This directory contains a protocol parser and basic networking functions for platform with support for malloc() and BSD-style sockets. The examples directory contains a client and a server to demonstrate the use of this library. LICENSE INFORMATION This library is published as open-source software without any warranty of any kind. Use is permitted under the terms of the GNU General Public License (GPL), Version 2 or higher, OR the revised BSD license. Please refer to LICENSE.GPL oder LICENSE.BSD for further details.