Trickle implementation for Rime
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adamdunkels
parent
e4a739a76c
commit
8147f47aab
3 changed files with 257 additions and 1 deletions
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CONTIKI_SOURCEFILES += rimebuf.c queuebuf.c rimeaddr.c ctimer.c rime.c \
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ibc.c uc.c suc.c ruc.c sibc.c sabc.c abc.c nf.c \
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mesh.c route.c \
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tree.c neighbor.c
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tree.c neighbor.c \
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trickle.c
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185
core/net/rime/trickle.c
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185
core/net/rime/trickle.c
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/*
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* Copyright (c) 2007, 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: trickle.c,v 1.1 2007/03/19 23:26:18 adamdunkels Exp $
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*/
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/**
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* \file
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* Trickle (reliable single source flooding) for Rime
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#include "net/rime/trickle.h"
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struct trickle_hdr {
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u8_t seqno;
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u8_t pad;
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};
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#define K 1
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#define DEFAULT_INTERVAL (CLOCK_SECOND / 2)
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#define INTERVAL_MIN 1
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#define INTERVAL_MAX 10
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#define SEQNO_LT(a, b) ((signed char)((a) - (b)) < 0)
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static int trickle_pt(struct trickle_conn *c);
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/*---------------------------------------------------------------------------*/
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static void
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send(struct trickle_conn *c)
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{
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struct trickle_hdr *hdr;
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if(c->q != NULL) {
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queuebuf_to_rimebuf(c->q);
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rimebuf_hdrextend(sizeof(struct trickle_hdr));
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hdr = rimebuf_hdrptr();
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hdr->seqno = c->seqno;
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abc_send(&c->c);
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}
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}
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/*---------------------------------------------------------------------------*/
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static void
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set_intervaltimer(struct trickle_conn *c)
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{
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ctimer_set(&c->intervaltimer, DEFAULT_INTERVAL << c->interval,
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(void (*)(void *))trickle_pt, c);
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}
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/*---------------------------------------------------------------------------*/
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static void
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set_listentimer(struct trickle_conn *c)
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{
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ctimer_set(&c->timer, (DEFAULT_INTERVAL << c->interval) / 2,
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(void (*)(void *))trickle_pt, c);
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}
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/*---------------------------------------------------------------------------*/
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static void
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set_transmittimer(struct trickle_conn *c)
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{
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clock_time_t tval = (DEFAULT_INTERVAL << c->interval) / 2;
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ctimer_set(&c->timer, random_rand() & tval,
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(void (*)(void *))trickle_pt, c);
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}
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/*---------------------------------------------------------------------------*/
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static void
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reset_interval(struct trickle_conn *c)
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{
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PT_INIT(&c->pt);
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trickle_pt(c);
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}
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/*---------------------------------------------------------------------------*/
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static void
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recv(struct abc_conn *abc)
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{
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struct trickle_conn *c = (struct trickle_conn *)abc;
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struct trickle_hdr *hdr = rimebuf_dataptr();
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rimebuf_hdrreduce(sizeof(struct trickle_hdr));
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if(hdr->seqno == c->seqno) {
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c->count++;
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} else if(SEQNO_LT(hdr->seqno, c->seqno)) {
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send(c);
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} else { /* hdr->seqno > c->seqno */
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c->seqno = hdr->seqno;
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/* Store the incoming data in the queuebuf */
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if(c->q != NULL) {
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queuebuf_free(c->q);
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}
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c->q = queuebuf_new_from_rimebuf();
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reset_interval(c);
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c->cb->recv(c);
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}
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}
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/*---------------------------------------------------------------------------*/
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static int
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trickle_pt(struct trickle_conn *c)
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{
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PT_BEGIN(&c->pt);
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c->interval = INTERVAL_MIN;
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while(1) {
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c->count = 0;
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set_intervaltimer(c);
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set_listentimer(c);
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PT_YIELD(&c->pt); /* Wait for listen timer to expire. */
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set_transmittimer(c);
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PT_YIELD(&c->pt); /* Wait for transmit timer to expire. */
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if(c->count < K) {
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send(c);
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}
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PT_YIELD(&c->pt); /* Wait for interval timer to expire. */
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c->interval++;
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if(c->interval > INTERVAL_MAX) {
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c->interval = INTERVAL_MAX;
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}
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}
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PT_END(&c->pt);
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}
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/*---------------------------------------------------------------------------*/
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static const struct abc_callbacks abc = {recv};
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/*---------------------------------------------------------------------------*/
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void
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trickle_open(struct trickle_conn *c, u16_t channel,
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const struct trickle_callbacks *cb)
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{
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abc_open(&c->c, channel, &abc);
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c->cb = cb;
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reset_interval(c);
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c->q = NULL;
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c->count = 0;
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}
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/*---------------------------------------------------------------------------*/
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void
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trickle_close(struct trickle_conn *c)
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{
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abc_close(&c->c);
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ctimer_stop(&c->intervaltimer);
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ctimer_stop(&c->timer);
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}
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/*---------------------------------------------------------------------------*/
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void
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trickle_send(struct trickle_conn *c)
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{
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if(c->q != NULL) {
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queuebuf_free(c->q);
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}
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c->q = queuebuf_new_from_rimebuf();
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c->seqno++;
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reset_interval(c);
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}
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/*---------------------------------------------------------------------------*/
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70
core/net/rime/trickle.h
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70
core/net/rime/trickle.h
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@ -0,0 +1,70 @@
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/*
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* Copyright (c) 2007, 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: trickle.h,v 1.1 2007/03/19 23:26:18 adamdunkels Exp $
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*/
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/**
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* \file
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* Header file for Trickle (reliable single source flooding) for Rime
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#ifndef __TRICKLE_H__
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#define __TRICKLE_H__
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#include "net/rime.h"
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struct trickle_conn;
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struct trickle_callbacks {
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void (* recv)(struct trickle_conn *c);
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};
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struct trickle_conn {
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struct abc_conn c;
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const struct trickle_callbacks *cb;
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struct queuebuf *q;
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struct ctimer intervaltimer;
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struct ctimer timer;
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struct pt pt;
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u8_t seqno;
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u8_t count;
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u8_t interval;
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};
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void trickle_open(struct trickle_conn *c, u16_t channel,
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const struct trickle_callbacks *cb);
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void trickle_close(struct trickle_conn *c);
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void trickle_send(struct trickle_conn *c);
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#endif /* __TRICKLE_H__ */
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