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architecture for the Rime stack for Contiki. The Chameleon architecture separates the header processing from the Rime protocol logic. Instead of having each protocol create its own part of the packet header, protocols use packet attributes. Before sending a packet, a special Chameleon header processing module creates a packet header from the packet attributes. The same Chameleon module parses incoming packets and creates packet attributes from the header. The details are in our SenSys 2007 paper: Adam Dunkels, Fredrik Osterlind, Zhitao He. An Adaptive Communication Architecture for Wireless Sensor Networks. In Proceedings of the Fifth ACM Conference on Networked Embedded Sensor Systems (SenSys 2007), Sydney, Australia, November 2007. http://www.sics.se/~adam/dunkels07adaptive.pdf This is a rewrite of the code that was developed for the paper.
142 lines
4.5 KiB
C
142 lines
4.5 KiB
C
/**
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* \addtogroup rime
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* @{
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*/
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/**
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* \defgroup rimeabc Anonymous best-effort local area broadcast
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* @{
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*
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* The abc module sends packets to all local area neighbors. The abc
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* module adds no headers to outgoing packets.
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*
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* \section channels Channels
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*
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* The abc module uses 1 channel.
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*
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*/
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/*
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* Copyright (c) 2006, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: abc.h,v 1.14 2008/02/25 02:14:34 adamdunkels Exp $
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*/
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/**
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* \file
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* Header file for the Rime module Anonymous BroadCast (abc)
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#ifndef __ABC_H__
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#define __ABC_H__
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#include "net/rime/rimebuf.h"
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#include "net/rime/channel.h"
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struct abc_conn;
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#define ABC_ATTRIBUTES
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/**
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* \brief Callback structure for abc
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*
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*/
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struct abc_callbacks {
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/** Called when a packet has been received by the abc module. */
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void (* recv)(struct abc_conn *ptr);
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};
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struct abc_conn {
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struct channel channel;
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const struct abc_callbacks *u;
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};
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/**
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* \brief Set up an anonymous best-effort broadcast connection
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* \param c A pointer to a struct abc_conn
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* \param channel The channel on which the connection will operate
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* \param u A struct abc_callbacks with function pointers to functions that will be called when a packet has been received
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*
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* This function sets up an abc connection on the
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* specified channel. The caller must have allocated the
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* memory for the struct abc_conn, usually by declaring it
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* as a static variable.
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*
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* The struct abc_callbacks pointer must point to a structure
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* containing a pointer to a function that will be called
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* when a packet arrives on the channel.
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*
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*/
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void abc_open(struct abc_conn *c, uint16_t channel,
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const struct abc_callbacks *u);
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/**
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* \brief Close an abc connection
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* \param c A pointer to a struct abc_conn
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*
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* This function closes an abc connection that has
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* previously been opened with abc_open().
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*
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* This function typically is called as an exit handler.
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*
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*/
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void abc_close(struct abc_conn *c);
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/**
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* \brief Send an anonymous best-effort broadcast packet
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* \param c The abc connection on which the packet should be sent
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* \retval Non-zero if the packet could be sent, zero otherwise
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*
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* This function sends an anonymous best-effort broadcast
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* packet. The packet must be present in the rimebuf
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* before this function is called.
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*
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* The parameter c must point to an abc connection that
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* must have previously been set up with abc_open().
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*
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*/
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int abc_send(struct abc_conn *c);
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/**
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* \brief Internal Rime function: Pass a packet to the abc layer
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*
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* This function is used internally by Rime to pass
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* packets to the abc layer. Should never be called
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* directly.
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*
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*/
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void abc_input(struct channel *channel);
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#endif /* __ABC_H__ */
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/** @} */
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/** @} */
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