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RIOT/sys/net/application_layer/cord/doc.txt
chrysn 049b5179a7 sys/net/app/cord and examples: Update references to -27
With all (the few necessary) changes done, this can claim -27
compatibility.
2021-03-01 11:59:57 +01:00

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/*
* Copyright (C) 2018 Freie Universität Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @defgroup net_cord CoRE RD Endpoint and Lookup Client
* @ingroup net
* @brief Library for interacting as endpoint and lookup client with CoRE
* Resource Directories
*
* # About
* The `cord` ([Co]RE [R]esource [D]irectory) module provides endpoint and
* lookup client functionality for interacting with CoRE Resource Directories
* (RDs) as defined in `draft-ietf-core-resource-directory-27`.
*
* @see https://tools.ietf.org/html/draft-ietf-core-resource-directory-27
*
* `draft-ietf-core-resource-directory-27` defines two types different roles for
* nodes when interacting with a RD:
* - `endpoint`: registers and manages entries at the RD
* - `client`: performs different kind of lookups
*
* ```
* Registration Lookup, Group
* Interface Interfaces
* +----+ | |
* | EP |---- | |
* +----+ ---- | |
* --|- +------+ |
* +----+ | ----| | | +--------+
* | EP | ---------|-----| RD |----|-----| Client |
* +----+ | ----| | | +--------+
* --|- +------+ |
* +----+ ---- | |
* | EP |---- | |
* +----+
* ```
* Figure copied form `draft-ietf-core-resource-directory-27`.
*
* @note In the context of this module, we refer to these roles as `endpoint
* (ep)` and `lookup client (lc)`. This should hopefully prevent some
* confusion in conjunction with the `client` and `server` roles as
* defined by CoAP.
*
* # Structure
*
* This module is structured in a number of submodules with goal to reflect the
* different roles described in `draft-ietf-core-resource-directory-27`:
*
* - `cord_ep`: standard endpoint implementation following the rules as
* defined i.a. in sections 5.2, 5.3, A.1, and A.2
* - `cord_epsim`: endpoint implementation following the simple registration
* procedure as defined in section 5.3.1
* - `cord_lc`: lookup client implementation for querying information from
* an RD using the lookup and group interfaces (**NOT
* YET IMPLEMENTED**)
* - `cord_config`: header file collection (default) configuration values used
* throughout this module
* - `cord_common`: shared functionality used by the above submodules
*
*/