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Replaced invalid attempt to switch preferred parent when its DS6 neighbor entry got purged.

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This commit is contained in:
nvt-se 2010-06-08 15:40:50 +00:00
parent f51e3a4f1e
commit b8848f29eb
1 changed files with 28 additions and 24 deletions
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52
core/net/rpl/rpl-dag.c
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@ -32,7 +32,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: rpl-dag.c,v 1.22 2010/06/07 14:01:22 nvt-se Exp $
* $Id: rpl-dag.c,v 1.23 2010/06/08 15:40:50 nvt-se Exp $
*/
/**
* \file
@ -318,6 +318,8 @@ rpl_preferred_parent(rpl_dag_t *dag)
if(dag->best_parent != best) {
dag->best_parent = best; /* Cache the value. */
rpl_set_default_route(dag, &best->addr);
/* The DAO parent set changed - schedule a DAO transmission. */
rpl_schedule_dao(dag);
}
return best;
}
@ -618,7 +620,7 @@ rpl_process_dio(uip_ipaddr_t *from, rpl_dio_t *dio)
return;
}
PRINTF("RPL: New parent with rank %hu ", p->rank);
PRINTF("RPL: New parent with rank %hu: ", p->rank);
PRINT6ADDR(from);
PRINTF("\n");
new_parent = 1;
@ -663,49 +665,51 @@ rpl_ds6_neighbor_callback(uip_ds6_nbr_t *nbr)
{
rpl_dag_t *dag;
rpl_parent_t *p;
rpl_parent_t *new_p;
if(nbr->isused) {
PRINTF("RPL: Neighbor state %u: ", nbr->state);
PRINT6ADDR(&nbr->ipaddr);
PRINTF("\n");
} else {
PRINTF("RPL: Removed neighbor ");
PRINT6ADDR(&nbr->ipaddr);
PRINTF("\n");
return;
}
dag = rpl_get_dag(RPL_ANY_INSTANCE);
if(dag == NULL) {
return;
}
PRINTF("RPL: Removing neighbor ");
PRINT6ADDR(&nbr->ipaddr);
PRINTF("\n");
p = rpl_find_parent(dag, &nbr->ipaddr);
if(p != NULL) {
rpl_remove_parent(dag, p);
}
dag = rpl_get_dag(RPL_ANY_INSTANCE);
if(dag == NULL) {
return;
}
if(dag->def_route != NULL &&
uip_ipaddr_cmp(&dag->def_route->ipaddr, &p->addr)) {
p = rpl_preferred_parent(dag);
if(p == NULL) {
rpl_free_dag(dag);
return;
p = rpl_find_parent(dag, &nbr->ipaddr);
if(p != NULL) {
if(p == dag->best_parent) {
/* Try to select a new preferred parent. */
new_p = rpl_preferred_parent(dag);
if(new_p == NULL) {
rpl_free_dag(dag);
return;
}
if(acceptable_rank_increase(dag, p)) {
dag->rank = dag->of->increment_rank(p->rank, p);
if(acceptable_rank_increase(dag, new_p)) {
dag->rank = dag->of->increment_rank(new_p->rank, new_p);
if(dag->rank < dag->min_rank) {
dag->min_rank = dag->rank;
dag->min_rank = dag->rank;
}
PRINTF("RPL: New rank is %hu, max is %hu\n",
dag->rank, dag->min_rank + dag->max_rankinc);
rpl_set_default_route(dag, &p->addr);
rpl_set_default_route(dag, &new_p->addr);
} else {
PRINTF("RPL: Cannot select the preferred parent\n");
/* do local repair - jump down the DAG */
rpl_set_default_route(dag, NULL);
remove_parents(dag, NULL, POISON_ROUTES);
dag->rank = INFINITE_RANK;
rpl_reset_dio_timer(dag, 1);
}
}
rpl_remove_parent(dag, p);
}
}