osd-contiki/core/net/rime/broadcast.h

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/**
* \addtogroup rime
* @{
*/
/**
* \defgroup rimeibc Best-effort local area broadcast
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* @{
*
* The broadcast module sends packets to all local area neighbors with an a
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* header that identifies the sender.
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*
* The broadcast module sends a packet to all local neighbors. The
* module adds the single-hop sender address as a packet attribute to
* outgoing packets. All Rime primitives that need the identity of
* the sender in the outgoing packets use the broadcast primitive,
* either directly or indirectly through any of the other
* communication primitives that are based on the broadcast primitive.
*
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* \section channels Channels
*
* The broadcast module uses 1 channel.
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*
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*/
/*
* Copyright (c) 2006, Swedish Institute of Computer Science.
* 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.
*
* This file is part of the Contiki operating system.
*
* $Id: broadcast.h,v 1.2 2009/03/07 11:15:46 adamdunkels Exp $
*/
/**
* \file
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* Header file for identified best-effort local area broadcast
* \author
* Adam Dunkels <adam@sics.se>
*/
#ifndef __BROADCAST_H__
#define __BROADCAST_H__
#include "net/rime/abc.h"
#include "net/rime/rimeaddr.h"
struct broadcast_conn;
#define BROADCAST_ATTRIBUTES { RIMEBUF_ADDR_SENDER, RIMEBUF_ADDRSIZE }, \
ABC_ATTRIBUTES
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/**
* \brief Callback structure for broadcast
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*
*/
struct broadcast_callbacks {
/** Called when a packet has been received by the broadcast module. */
void (* recv)(struct broadcast_conn *ptr, rimeaddr_t *sender);
};
struct broadcast_conn {
struct abc_conn c;
const struct broadcast_callbacks *u;
};
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/**
* \brief Set up an identified best-effort broadcast connection
* \param c A pointer to a struct broadcast_conn
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* \param channel The channel on which the connection will operate
* \param u A struct broadcast_callbacks with function pointers to functions that will be called when a packet has been received
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*
* This function sets up a broadcast connection on the
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* specified channel. The caller must have allocated the
* memory for the struct broadcast_conn, usually by declaring it
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* as a static variable.
*
* The struct broadcast_callbacks pointer must point to a structure
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* containing a pointer to a function that will be called
* when a packet arrives on the channel.
*
*/
void broadcast_open(struct broadcast_conn *c, uint16_t channel,
const struct broadcast_callbacks *u);
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/**
* \brief Close a broadcast connection
* \param c A pointer to a struct broadcast_conn
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*
* This function closes a broadcast connection that has
* previously been opened with broadcast_open().
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*
* This function typically is called as an exit handler.
*
*/
void broadcast_close(struct broadcast_conn *c);
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/**
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* \brief Send an identified best-effort broadcast packet
* \param c The broadcast 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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* This function sends an identified best-effort broadcast
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* packet. The packet must be present in the rimebuf
* before this function is called.
*
* The parameter c must point to a broadcast connection that
* must have previously been set up with broadcast_open().
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*
*/
int broadcast_send(struct broadcast_conn *c);
#endif /* __BROADCAST_H__ */
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/** @} */
/** @} */