140 lines
4.9 KiB
C
140 lines
4.9 KiB
C
/**
|
|
* \addtogroup rime
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* \defgroup rimeibc Best-effort local area broadcast
|
|
* @{
|
|
*
|
|
* The broadcast module sends packets to all local area neighbors with an a
|
|
* header that identifies the sender.
|
|
*
|
|
* 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.
|
|
*
|
|
* \section channels Channels
|
|
*
|
|
* The broadcast module uses 1 channel.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* 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 1.3 2009/03/12 21:58:20 adamdunkels Exp $
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* 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 { PACKETBUF_ADDR_SENDER, PACKETBUF_ADDRSIZE }, \
|
|
ABC_ATTRIBUTES
|
|
|
|
/**
|
|
* \brief Callback structure for broadcast
|
|
*
|
|
*/
|
|
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;
|
|
};
|
|
|
|
/**
|
|
* \brief Set up an identified best-effort broadcast connection
|
|
* \param c A pointer to a struct broadcast_conn
|
|
* \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
|
|
*
|
|
* This function sets up a broadcast connection on the
|
|
* specified channel. The caller must have allocated the
|
|
* memory for the struct broadcast_conn, usually by declaring it
|
|
* as a static variable.
|
|
*
|
|
* The struct broadcast_callbacks pointer must point to a structure
|
|
* 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);
|
|
|
|
/**
|
|
* \brief Close a broadcast connection
|
|
* \param c A pointer to a struct broadcast_conn
|
|
*
|
|
* This function closes a broadcast connection that has
|
|
* previously been opened with broadcast_open().
|
|
*
|
|
* This function typically is called as an exit handler.
|
|
*
|
|
*/
|
|
void broadcast_close(struct broadcast_conn *c);
|
|
|
|
/**
|
|
* \brief Send an identified best-effort broadcast packet
|
|
* \param c The broadcast connection on which the packet should be sent
|
|
* \retval Non-zero if the packet could be sent, zero otherwise
|
|
*
|
|
* This function sends an identified best-effort broadcast
|
|
* packet. The packet must be present in the packetbuf
|
|
* before this function is called.
|
|
*
|
|
* The parameter c must point to a broadcast connection that
|
|
* must have previously been set up with broadcast_open().
|
|
*
|
|
*/
|
|
int broadcast_send(struct broadcast_conn *c);
|
|
|
|
#endif /* __BROADCAST_H__ */
|
|
/** @} */
|
|
/** @} */
|