140 lines
4.9 KiB
C
140 lines
4.9 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 rimeibc Best-effort local area broadcast
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* @{
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*
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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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*
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* The broadcast module sends a packet to all local neighbors. The
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* module adds the single-hop sender address as a packet attribute to
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* outgoing packets. All Rime primitives that need the identity of
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* the sender in the outgoing packets use the broadcast primitive,
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* either directly or indirectly through any of the other
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* communication primitives that are based on the broadcast primitive.
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*
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* \section channels Channels
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*
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* The broadcast 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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*/
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/**
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* \file
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* Header file for identified best-effort local area broadcast
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#ifndef __BROADCAST_H__
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#define __BROADCAST_H__
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#include "net/rime/abc.h"
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#include "net/rime/rimeaddr.h"
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struct broadcast_conn;
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#define BROADCAST_ATTRIBUTES { PACKETBUF_ADDR_SENDER, PACKETBUF_ADDRSIZE }, \
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ABC_ATTRIBUTES
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/**
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* \brief Callback structure for broadcast
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*
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*/
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struct broadcast_callbacks {
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/** Called when a packet has been received by the broadcast module. */
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void (* recv)(struct broadcast_conn *ptr, const rimeaddr_t *sender);
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void (* sent)(struct broadcast_conn *ptr, int status, int num_tx);
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};
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struct broadcast_conn {
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struct abc_conn c;
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const struct broadcast_callbacks *u;
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};
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/**
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* \brief Set up an identified best-effort broadcast connection
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* \param c A pointer to a struct broadcast_conn
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* \param channel The channel on which the connection will operate
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* \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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*
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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
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* memory for the struct broadcast_conn, usually by declaring it
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* as a static variable.
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*
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* The struct broadcast_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 broadcast_open(struct broadcast_conn *c, uint16_t channel,
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const struct broadcast_callbacks *u);
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/**
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* \brief Close a broadcast connection
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* \param c A pointer to a struct broadcast_conn
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*
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* This function closes a broadcast connection that has
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* previously been opened with broadcast_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 broadcast_close(struct broadcast_conn *c);
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/**
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* \brief Send an identified best-effort broadcast packet
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* \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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*
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* This function sends an identified best-effort broadcast
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* packet. The packet must be present in the packetbuf
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* before this function is called.
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*
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* The parameter c must point to a broadcast connection that
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* must have previously been set up with broadcast_open().
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*
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*/
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int broadcast_send(struct broadcast_conn *c);
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#endif /* __BROADCAST_H__ */
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/** @} */
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/** @} */
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