osd-contiki/apps/treeroute/treeroute.c

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2007-03-14 02:05:23 +01:00
/*
* 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: treeroute.c,v 1.1 2007/03/14 01:05:23 adamdunkels Exp $
*/
/**
* \file
* A brief description of what this file is.
* \author
* Adam Dunkels <adam@sics.se>
*/
#include "contiki.h"
#include "net/rime.h"
#include "dev/radio-sensor.h"
#if NETSIM
#include "ether.h"
#endif
#include <string.h>
#include <stdio.h>
PROCESS(routing_process, "Routing process");
PROCESS(hopcount_blink_process, "Hopcount indicator");
AUTOSTART_PROCESSES(&routing_process, &hopcount_blink_process);
static struct ruc_conn ruc_conn;
static struct sibc_conn sibc_conn;
struct hdr {
node_id_t originator_id;
u8_t originator_seqno;
u8_t hopcount;
u8_t hoplim;
u8_t retransmissions;
u8_t datalen;
u8_t data[1];
};
#define SINK 0
#define HOPCOUNT_MAX 63
#define MAX_HOPLIM 10
static int forwarding;
static struct hdr hello;
static int seqno;
static void (* receiver)(u8_t *data, int len,
u8_t originator, u8_t seqno, u8_t last_hop_id,
u8_t hops, u8_t retransmissions) = NULL;
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(hopcount_blink_process, ev, data)
{
static struct etimer et;
static int count;
PROCESS_BEGIN();
while(1) {
etimer_set(&et, CLOCK_SECOND * 1);
PROCESS_WAIT_UNTIL(etimer_expired(&et));
count = hello.hopcount;
if(count == HOPCOUNT_MAX) {
leds_on(LEDS_RED);
} else {
leds_off(LEDS_RED);
while(count > 0) {
leds_on(LEDS_RED);
etimer_set(&et, CLOCK_SECOND / 10);
PROCESS_WAIT_UNTIL(etimer_expired(&et));
leds_off(LEDS_RED);
etimer_set(&et, CLOCK_SECOND / 10);
PROCESS_WAIT_UNTIL(etimer_expired(&et));
--count;
}
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
static void
update_hopcount(void)
{
struct neighbor *n;
if(hello.hopcount != SINK) {
n = neighbor_best();
if(n == NULL) {
/* if(hopcount != HOPCOUNT_MAX) {
printf("%d: didn't find a best neighbor, setting hopcount to max\n", node_id);
}*/
hello.hopcount = HOPCOUNT_MAX;
} else {
if(n->hopcount + 1 != hello.hopcount) {
hello.hopcount = n->hopcount + 1;
}
}
}
/* DEBUG_PRINTF("%d: new hopcount %d\n", node_id, hopcount);*/
#if NETSIM
{
char buf[8];
if(hello.hopcount == HOPCOUNT_MAX) {
strcpy(buf, " ");
} else {
snprintf(buf, sizeof(buf), "%d", hello.hopcount);
}
ether_set_text(buf);
}
#endif
}
/*---------------------------------------------------------------------------*/
static void
neighbor_packet_received(struct sibc_conn *c, node_id_t from)
{
struct hdr *hdr = rimebuf_dataptr();
struct neighbor *n;
/* printf("%d: neighbor_packet_received from %d with hopcount %d\n",
node_id, from, hdr->hopcount
);*/
n = neighbor_find(from);
if(n == NULL) {
neighbor_add(from, hdr->hopcount, radio_sensor.value(1));
} else {
neighbor_update(n, hdr->hopcount, radio_sensor.value(1));
}
update_hopcount();
}
/*---------------------------------------------------------------------------*/
static int
node_packet_received(struct ruc_conn *c, node_id_t from, u8_t seqno)
{
struct hdr *hdr = rimebuf_dataptr();
struct neighbor *n;
if(hello.hopcount == SINK) {
printf("Sink packet received\n");
if(receiver != NULL) {
receiver(hdr->data, hdr->datalen,
hdr->originator_id, hdr->originator_seqno,
from, MAX_HOPLIM - hdr->hoplim,
hdr->retransmissions);
}
return 1;
} else if(hdr->hoplim > 1 && hello.hopcount != HOPCOUNT_MAX) {
printf("%d: packet received from %d, forwarding %d, best neighbor %p\n", node_id, from, forwarding, neighbor_best());
if(!forwarding) {
forwarding = 1;
n = neighbor_best();
if(n != NULL) {
ruc_send(c, NEIGHBOR_NODEID(n));
}
return 1;
} else {
printf("%d: still forwarding another packet, not sending ACK\n", node_id);
return 0;
}
}
return 1;
}
/*---------------------------------------------------------------------------*/
static void
node_packet_sent(struct ruc_conn *c)
{
forwarding = 0;
}
/*---------------------------------------------------------------------------*/
static const struct sibc_ulayer sibc_ulayer = {neighbor_packet_received, NULL};
static const struct ruc_ulayer ruc_ulayer = {node_packet_received,
node_packet_sent};
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(routing_process, ev, data)
{
struct neighbor *n;
struct hdr *hdr;
PROCESS_BEGIN();
rime_init();
sibc_setup(&sibc_conn, CHANNEL_TREEROUTE_META, &sibc_ulayer);
ruc_setup(&ruc_conn, CHANNEL_TREEROUTE_DATA, &ruc_ulayer);
button_sensor.activate();
radio_sensor.activate();
PROCESS_PAUSE();
hello.hopcount = HOPCOUNT_MAX;
rimebuf_clear();
rimebuf_reference(&hello, sizeof(hello));
sibc_send_stubborn(&sibc_conn, CLOCK_SECOND * 8);
while(1) {
PROCESS_WAIT_EVENT();
if(ev == sensors_event) {
if(data == &pir_sensor) {
rimebuf_clear();
hdr = rimebuf_dataptr();
hdr->originator_seqno = seqno++;
hdr->originator_id = node_id;
hdr->hopcount = hello.hopcount;
hdr->hoplim = MAX_HOPLIM;
hdr->retransmissions = 0;
hdr->datalen = 0;
rimebuf_set_datalen(sizeof(struct hdr));
printf("Sending sensor event\n");
n = neighbor_best();
if(n != NULL) {
printf("Sending to best neighbor\n");
ruc_send(&ruc_conn, NEIGHBOR_NODEID(n));
} else {
printf("Didn't find any neighbor\n");
}
}
if(data == &button_sensor) {
printf("Button\n");
hello.hopcount = SINK;
}
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/