168 lines
4.9 KiB
C
168 lines
4.9 KiB
C
/**
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* \addtogroup rimenbh
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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: nbh.c,v 1.4 2007/11/17 10:34:17 adamdunkels Exp $
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*/
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/**
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* \file
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* Neighborhood discovery
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#include "contiki.h"
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#include "net/rime.h"
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#include "net/rime/neighbor.h"
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#include "net/rime/nf.h"
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#include "net/rime/nbh.h"
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#include "dev/radio-sensor.h"
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#include "lib/random.h"
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#if NETSIM
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#include "ether.h"
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#endif
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#include <string.h>
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#include <stdio.h>
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#include <stddef.h>
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struct adv_msg {
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u16_t val;
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};
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#define SINK 0
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#define HOPCOUNT_MAX TREE_MAX_DEPTH
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#define MAX_HOPLIM 10
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#define MAX_INTERVAL CLOCK_SECOND * 20
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#define MIN_INTERVAL CLOCK_SECOND * 10
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#define DEBUG 0
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#if DEBUG
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#include <stdio.h>
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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/*---------------------------------------------------------------------------*/
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static void
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send_adv(struct nbh_conn *c, clock_time_t interval)
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{
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struct adv_msg *hdr;
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rimebuf_clear();
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rimebuf_set_datalen(sizeof(struct adv_msg));
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hdr = rimebuf_dataptr();
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hdr->val = c->val;
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ibc_send(&c->c);
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if(c->u->sent) {
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c->u->sent(c);
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}
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PRINTF("%d.%d: sending neighbor advertisement with val %d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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c->val);
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}
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/*---------------------------------------------------------------------------*/
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static void
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adv_packet_received(struct ibc_conn *ibc, rimeaddr_t *from)
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{
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struct nbh_conn *c = (struct nbh_conn *)ibc;
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struct adv_msg *msg = rimebuf_dataptr();
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/* struct neighbor *n; */
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PRINTF("%d.%d: adv_packet_received from %d.%d with val %d\n",
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rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
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from->u8[0], from->u8[1], msg->val);
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/* n = neighbor_find(from); */
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/* if(n == NULL) { */
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/* neighbor_add(from, msg->val, radio_sensor.value(1)); */
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/* } else { */
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/* neighbor_update(n, msg->val, radio_sensor.value(1)); */
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/* PRINTF("%d.%d: updating neighbor %d.%d, radio sensor %d, hops %d\n", */
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/* rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1], */
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/* n->addr.u8[0], n->addr.u8[1], */
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/* radio_sensor.value(1), msg->val); */
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/* } */
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if(c->u->recv) {
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c->u->recv(c, from, msg->val);
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}
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}
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/*---------------------------------------------------------------------------*/
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static void
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send_timer(void *ptr)
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{
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struct nbh_conn *tc = ptr;
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send_adv(tc, MAX_INTERVAL / 2);
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ctimer_set(&tc->t,
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MIN_INTERVAL + random_rand() % (MAX_INTERVAL - MIN_INTERVAL),
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send_timer, tc);
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}
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/*---------------------------------------------------------------------------*/
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static const struct ibc_callbacks ibc_callbacks =
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{adv_packet_received};
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/*---------------------------------------------------------------------------*/
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void
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nbh_open(struct nbh_conn *c, uint16_t channel,
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const struct nbh_callbacks *cb)
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{
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ibc_open(&c->c, channel, &ibc_callbacks);
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c->u = cb;
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}
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/*---------------------------------------------------------------------------*/
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void
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nbh_close(struct nbh_conn *c)
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{
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ibc_close(&c->c);
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ctimer_stop(&c->t);
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}
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/*---------------------------------------------------------------------------*/
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void
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nbh_start(struct nbh_conn *c, uint16_t val)
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{
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c->val = val;
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ctimer_set(&c->t, random_rand() % MIN_INTERVAL, send_timer, c);
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}
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/*---------------------------------------------------------------------------*/
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/** @} */
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