nes-proj/os/net/mac/tsch/tsch-rpl.c

149 lines
5.2 KiB
C

/*
* Copyright (c) 2014, SICS Swedish ICT.
* 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.
*
*/
/**
* \file
* Interaction between TSCH and RPL
*
* \author Simon Duquennoy <simonduq@sics.se>
*/
/**
* \addtogroup tsch
* @{
*/
#include "contiki.h"
#if UIP_CONF_IPV6_RPL
#include "net/routing/routing.h"
#include "net/mac/tsch/tsch.h"
#include "net/link-stats.h"
#if ROUTING_CONF_RPL_LITE
#include "net/routing/rpl-lite/rpl.h"
#elif ROUTING_CONF_RPL_CLASSIC
#include "net/routing/rpl-classic/rpl.h"
#include "net/routing/rpl-classic/rpl-private.h"
#endif
/* Log configuration */
#include "sys/log.h"
#define LOG_MODULE "TSCH RPL"
#define LOG_LEVEL LOG_LEVEL_MAC
/*---------------------------------------------------------------------------*/
/* To use, set #define TSCH_CALLBACK_KA_SENT tsch_rpl_callback_ka_sent */
void
tsch_rpl_callback_ka_sent(int status, int transmissions)
{
NETSTACK_ROUTING.link_callback(packetbuf_addr(PACKETBUF_ADDR_RECEIVER), status, transmissions);
}
/*---------------------------------------------------------------------------*/
/* To use, set #define TSCH_CALLBACK_JOINING_NETWORK tsch_rpl_callback_joining_network */
void
tsch_rpl_callback_joining_network(void)
{
}
/*---------------------------------------------------------------------------*/
/* Upon leaving a TSCH network, perform a local repair
* (cleanup neighbor state, reset Trickle timer etc)
* To use, set #define TSCH_CALLBACK_LEAVING_NETWORK tsch_rpl_callback_leaving_network */
void
tsch_rpl_callback_leaving_network(void)
{
/* Forget past link statistics. If we are leaving a TSCH
network, there are changes we've been out of sync in the recent past, and
as a result have irrelevant link statistices. */
link_stats_reset();
/* RPL local repair */
NETSTACK_ROUTING.local_repair("TSCH leaving");
}
/*---------------------------------------------------------------------------*/
/* Set TSCH EB period based on current RPL DIO period.
* To use, set #define RPL_CALLBACK_NEW_DIO_INTERVAL tsch_rpl_callback_new_dio_interval */
void
tsch_rpl_callback_new_dio_interval(clock_time_t dio_interval)
{
/* Transmit EBs only if we have a valid rank as per 6TiSCH minimal */
rpl_dag_t *dag;
rpl_rank_t root_rank;
rpl_rank_t dag_rank;
#if ROUTING_CONF_RPL_LITE
dag = &curr_instance.dag;
root_rank = ROOT_RANK;
dag_rank = DAG_RANK(dag->rank);
#else
rpl_instance_t *instance;
dag = rpl_get_any_dag();
instance = dag != NULL ? dag->instance : NULL;
root_rank = ROOT_RANK(instance);
dag_rank = DAG_RANK(dag->rank, instance);
#endif
if(dag != NULL && dag->rank != RPL_INFINITE_RANK) {
/* If we are root set TSCH as coordinator */
if(dag->rank == root_rank) {
tsch_set_coordinator(1);
}
/* Set EB period */
tsch_set_eb_period(dio_interval);
/* Set join priority based on RPL rank */
tsch_set_join_priority(dag_rank - 1);
} else {
tsch_set_eb_period(TSCH_EB_PERIOD);
}
}
/*---------------------------------------------------------------------------*/
/* Set TSCH time source based on current RPL preferred parent.
* To use, set #define RPL_CALLBACK_PARENT_SWITCH tsch_rpl_callback_parent_switch */
void
tsch_rpl_callback_parent_switch(rpl_parent_t *old, rpl_parent_t *new)
{
/* Map the TSCH time source on the RPL preferred parent (but stick to the
* current time source if there is no preferred aarent) */
if(tsch_is_associated == 1 && new != NULL) {
tsch_queue_update_time_source(
(const linkaddr_t *)uip_ds6_nbr_lladdr_from_ipaddr(
rpl_parent_get_ipaddr(new)));
}
}
/*---------------------------------------------------------------------------*/
/* Check RPL has joined DODAG.
* To use, set #define TSCH_RPL_CHECK_DODAG_JOINED tsch_rpl_check_dodag_joined */
int
tsch_rpl_check_dodag_joined(void)
{
return NETSTACK_ROUTING.node_has_joined();
}
#endif /* UIP_CONF_IPV6_RPL */
/** @} */