contiki/examples/rime/example-announcement.c

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/*
* Copyright (c) 2009, 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.
*
*/
/**
* \file
* Example code that uses the annuncement module
* \author
* Adam Dunkels <adam@sics.se>
*/
#include "contiki.h"
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#include "net/rime/rime.h"
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#include "net/rime/announcement.h"
#include <stdio.h>
#if CONTIKI_TARGET_NETSIM
#include "ether.h"
#endif
/*---------------------------------------------------------------------------*/
PROCESS(example_announcement_process, "Example announcement process");
AUTOSTART_PROCESSES(&example_announcement_process);
/*---------------------------------------------------------------------------*/
static void
received_announcement(struct announcement *a, const linkaddr_t *from,
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uint16_t id, uint16_t value)
{
/* We set our own announced value to one plus that of our neighbor. */
announcement_set_value(a, value + 1);
printf("Got announcement from %d.%d, id %d, value %d, our new value is %d\n",
from->u8[0], from->u8[1], id, value, value + 1);
#if CONTIKI_TARGET_NETSIM
{
char buf[8];
sprintf(buf, "%d", value + 1);
ether_set_text(buf);
}
#endif
}
static struct announcement example_announcement;
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(example_announcement_process, ev, data)
{
PROCESS_EXITHANDLER(announcement_remove(&example_announcement);)
PROCESS_BEGIN();
/* Register an announcement with ID 128. We provide the
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'received_announcement' function pointer so that this function
will be called when a announcements from neighbors are heard. */
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announcement_register(&example_announcement,
128,
received_announcement);
/* Set the lowest eight bytes of the Rime address as the value. */
announcement_set_value(&example_announcement, linkaddr_node_addr.u8[0]);
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while(1) {
static struct etimer et;
/* Listen for announcements every ten seconds. */
etimer_set(&et, CLOCK_SECOND * 10);
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
announcement_listen(1);
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/