/*---------------------------------------------------------------------------*/
int
rpl_process_parent_event(rpl_instance_t *instance, rpl_parent_t *p)
{
rpl_rank_t old_rank;
int return_value;
old_rank = instance->current_dag->rank;
return_value = 1;
if(!acceptable_rank(p->dag, p->rank)) {
/* The candidate parent is no longer valid: the rank increase resulting
from the choice of it as a parent would be too high. */
PRINTF("RPL: Unacceptable rank %u\n", (unsigned)p->rank);
if(p != instance->current_dag->preferred_parent) {
rpl_nullify_parent(p->dag, p);
return 0;
} else {
rpl_nullify_parent(p->dag, p);
return_value = 0;
}
}
if(rpl_select_dag(instance, p) == NULL) {
/* No suitable parent; trigger a local repair. */
PRINTF("RPL: No parents found in any DAG\n");
rpl_local_repair(instance);
return 0;
}
#if DEBUG
if(DAG_RANK(old_rank, instance) != DAG_RANK(instance->current_dag->rank, instance)) {
PRINTF("RPL: Moving in the instance from rank %hu to %hu\n",
DAG_RANK(old_rank, instance), DAG_RANK(instance->current_dag->rank, instance));
if(instance->current_dag->rank != INFINITE_RANK) {
PRINTF("RPL: The preferred parent is ");
PRINT6ADDR(&instance->current_dag->preferred_parent->addr);
PRINTF(" (rank %u)\n",
(unsigned)DAG_RANK(instance->current_dag->preferred_parent->rank, instance));
} else {
PRINTF("RPL: We don't have any parent");
}
}
#endif /* DEBUG */
return return_value;
}
/*---------------------------------------------------------------------------*/
void
rpl_remove_parent(rpl_parent_t *parent)
{
PRINTF("RPL: Removing parent ");
PRINT6ADDR(rpl_get_parent_ipaddr(parent));
PRINTF("\n");
rpl_nullify_parent(parent);
nbr_table_remove(rpl_parents, parent);
}
/*---------------------------------------------------------------------------*/
void
rpl_remove_parent(rpl_dag_t *dag, rpl_parent_t *parent)
{
rpl_nullify_parent(dag, parent);
PRINTF("RPL: Removing parent ");
PRINT6ADDR(&parent->addr);
PRINTF("\n");
list_remove(dag->parents, parent);
memb_free(&parent_memb, parent);
}
/*---------------------------------------------------------------------------*/
void
rpl_remove_parent(rpl_dag_t *dag, rpl_parent_t *parent)
{
rpl_nullify_parent(dag, parent);
PRINTF("RPL: Removing parent ");
PRINT6ADDR(&parent->addr);
PRINTF("\n");
ANNOTATE("#L %u 0\n", parent->addr.u8[sizeof(uip_ipaddr_t) - 1]);
list_remove(dag->parents, parent);
memb_free(&parent_memb, parent);
}
/*---------------------------------------------------------------------------*/
static void
nullify_parents(rpl_dag_t *dag, rpl_rank_t minimum_rank)
{
rpl_parent_t *p, *p2;
PRINTF("RPL: Removing parents (minimum rank %u)\n",
minimum_rank);
for(p = list_head(dag->parents); p != NULL; p = p2) {
p2 = p->next;
if(p->rank >= minimum_rank) {
rpl_nullify_parent(dag, p);
}
}
}
/*---------------------------------------------------------------------------*/
static void
nullify_parents(rpl_dag_t *dag, rpl_rank_t minimum_rank)
{
rpl_parent_t *p;
// PRINTF("RPL: Removing parents (minimum rank %u)\n",minimum_rank);
p = nbr_table_head(rpl_parents);
while(p != NULL) {
if(dag == p->dag && p->rank >= minimum_rank) {
rpl_nullify_parent(p);
}
p = nbr_table_next(rpl_parents, p);
}
}
