Treeroute implemented with Rime
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adamdunkels
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9d030483ff
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6a81c10756
274
apps/treeroute/treeroute.c
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274
apps/treeroute/treeroute.c
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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: treeroute.c,v 1.1 2007/03/14 01:05:23 adamdunkels Exp $
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*/
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/**
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* \file
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* A brief description of what this file is.
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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 "dev/radio-sensor.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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PROCESS(routing_process, "Routing process");
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PROCESS(hopcount_blink_process, "Hopcount indicator");
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AUTOSTART_PROCESSES(&routing_process, &hopcount_blink_process);
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static struct ruc_conn ruc_conn;
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static struct sibc_conn sibc_conn;
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struct hdr {
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node_id_t originator_id;
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u8_t originator_seqno;
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u8_t hopcount;
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u8_t hoplim;
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u8_t retransmissions;
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u8_t datalen;
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u8_t data[1];
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};
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#define SINK 0
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#define HOPCOUNT_MAX 63
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#define MAX_HOPLIM 10
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static int forwarding;
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static struct hdr hello;
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static int seqno;
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static void (* receiver)(u8_t *data, int len,
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u8_t originator, u8_t seqno, u8_t last_hop_id,
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u8_t hops, u8_t retransmissions) = NULL;
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(hopcount_blink_process, ev, data)
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{
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static struct etimer et;
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static int count;
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PROCESS_BEGIN();
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while(1) {
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etimer_set(&et, CLOCK_SECOND * 1);
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PROCESS_WAIT_UNTIL(etimer_expired(&et));
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count = hello.hopcount;
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if(count == HOPCOUNT_MAX) {
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leds_on(LEDS_RED);
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} else {
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leds_off(LEDS_RED);
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while(count > 0) {
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leds_on(LEDS_RED);
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etimer_set(&et, CLOCK_SECOND / 10);
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PROCESS_WAIT_UNTIL(etimer_expired(&et));
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leds_off(LEDS_RED);
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etimer_set(&et, CLOCK_SECOND / 10);
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PROCESS_WAIT_UNTIL(etimer_expired(&et));
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--count;
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}
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}
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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static void
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update_hopcount(void)
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{
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struct neighbor *n;
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if(hello.hopcount != SINK) {
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n = neighbor_best();
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if(n == NULL) {
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/* if(hopcount != HOPCOUNT_MAX) {
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printf("%d: didn't find a best neighbor, setting hopcount to max\n", node_id);
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}*/
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hello.hopcount = HOPCOUNT_MAX;
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} else {
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if(n->hopcount + 1 != hello.hopcount) {
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hello.hopcount = n->hopcount + 1;
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}
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}
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}
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/* DEBUG_PRINTF("%d: new hopcount %d\n", node_id, hopcount);*/
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#if NETSIM
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{
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char buf[8];
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if(hello.hopcount == HOPCOUNT_MAX) {
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strcpy(buf, " ");
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} else {
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snprintf(buf, sizeof(buf), "%d", hello.hopcount);
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}
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ether_set_text(buf);
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}
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#endif
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}
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/*---------------------------------------------------------------------------*/
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static void
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neighbor_packet_received(struct sibc_conn *c, node_id_t from)
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{
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struct hdr *hdr = rimebuf_dataptr();
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struct neighbor *n;
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/* printf("%d: neighbor_packet_received from %d with hopcount %d\n",
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node_id, from, hdr->hopcount
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);*/
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n = neighbor_find(from);
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if(n == NULL) {
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neighbor_add(from, hdr->hopcount, radio_sensor.value(1));
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} else {
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neighbor_update(n, hdr->hopcount, radio_sensor.value(1));
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}
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update_hopcount();
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}
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/*---------------------------------------------------------------------------*/
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static int
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node_packet_received(struct ruc_conn *c, node_id_t from, u8_t seqno)
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{
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struct hdr *hdr = rimebuf_dataptr();
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struct neighbor *n;
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if(hello.hopcount == SINK) {
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printf("Sink packet received\n");
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if(receiver != NULL) {
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receiver(hdr->data, hdr->datalen,
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hdr->originator_id, hdr->originator_seqno,
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from, MAX_HOPLIM - hdr->hoplim,
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hdr->retransmissions);
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}
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return 1;
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} else if(hdr->hoplim > 1 && hello.hopcount != HOPCOUNT_MAX) {
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printf("%d: packet received from %d, forwarding %d, best neighbor %p\n", node_id, from, forwarding, neighbor_best());
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if(!forwarding) {
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forwarding = 1;
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n = neighbor_best();
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if(n != NULL) {
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ruc_send(c, NEIGHBOR_NODEID(n));
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}
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return 1;
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} else {
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printf("%d: still forwarding another packet, not sending ACK\n", node_id);
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return 0;
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}
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}
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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static void
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node_packet_sent(struct ruc_conn *c)
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{
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forwarding = 0;
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}
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/*---------------------------------------------------------------------------*/
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static const struct sibc_ulayer sibc_ulayer = {neighbor_packet_received, NULL};
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static const struct ruc_ulayer ruc_ulayer = {node_packet_received,
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node_packet_sent};
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(routing_process, ev, data)
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{
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struct neighbor *n;
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struct hdr *hdr;
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PROCESS_BEGIN();
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rime_init();
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sibc_setup(&sibc_conn, CHANNEL_TREEROUTE_META, &sibc_ulayer);
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ruc_setup(&ruc_conn, CHANNEL_TREEROUTE_DATA, &ruc_ulayer);
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button_sensor.activate();
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radio_sensor.activate();
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PROCESS_PAUSE();
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hello.hopcount = HOPCOUNT_MAX;
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rimebuf_clear();
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rimebuf_reference(&hello, sizeof(hello));
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sibc_send_stubborn(&sibc_conn, CLOCK_SECOND * 8);
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while(1) {
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PROCESS_WAIT_EVENT();
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if(ev == sensors_event) {
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if(data == &pir_sensor) {
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rimebuf_clear();
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hdr = rimebuf_dataptr();
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hdr->originator_seqno = seqno++;
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hdr->originator_id = node_id;
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hdr->hopcount = hello.hopcount;
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hdr->hoplim = MAX_HOPLIM;
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hdr->retransmissions = 0;
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hdr->datalen = 0;
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rimebuf_set_datalen(sizeof(struct hdr));
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printf("Sending sensor event\n");
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n = neighbor_best();
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if(n != NULL) {
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printf("Sending to best neighbor\n");
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ruc_send(&ruc_conn, NEIGHBOR_NODEID(n));
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} else {
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printf("Didn't find any neighbor\n");
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}
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}
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if(data == &button_sensor) {
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printf("Button\n");
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hello.hopcount = SINK;
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}
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}
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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