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Announce MAX_PATH_COST if we don't have a preferred parent.

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This commit is contained in:
nvt 2011-04-25 22:37:25 +02:00
parent d80449244d
commit 4b5d380c74
1 changed files with 27 additions and 13 deletions
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40
core/net/rpl/rpl-of-etx.c
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@ -83,10 +83,10 @@ rpl_of_t rpl_of_etx = {
typedef uint16_t rpl_path_metric_t;
static uint16_t
static rpl_path_metric_t
calculate_path_metric(rpl_parent_t *p)
{
if(p->mc.obj.etx == 0 && p->rank > ROOT_RANK(p->dag)) {
if(p == NULL || (p->mc.obj.etx == 0 && p->rank > ROOT_RANK(p->dag))) {
return MAX_PATH_COST * RPL_DAG_MC_ETX_DIVISOR;
}
return p->mc.obj.etx + NI_ETX_TO_RPL_ETX(p->link_metric);
@ -166,34 +166,48 @@ best_parent(rpl_parent_t *p1, rpl_parent_t *p2)
static void
update_metric_container(rpl_dag_t *dag)
{
#if RPL_DAG_MC == RPL_DAG_MC_ETX
dag->mc.type = RPL_DAG_MC_ETX;
rpl_path_metric_t path_metric;
#if RPL_DAG_MC == RPL_DAG_MC_ENERGY
uint8_t type;
#endif
dag->mc.flags = RPL_DAG_MC_FLAG_P;
dag->mc.aggr = RPL_DAG_MC_AGGR_ADDITIVE;
dag->mc.prec = 0;
dag->mc.length = sizeof(dag->mc.obj.etx);
if(dag->rank == ROOT_RANK(dag)) {
dag->mc.obj.etx = 0;
path_metric = 0;
} else {
dag->mc.obj.etx = calculate_path_metric(dag->preferred_parent);
path_metric = calculate_path_metric(dag->preferred_parent);
}
#if RPL_DAG_MC == RPL_DAG_MC_ETX
dag->mc.type = RPL_DAG_MC_ETX;
dag->mc.length = sizeof(dag->mc.obj.etx);
dag->mc.obj.etx = path_metric;
PRINTF("RPL: My path ETX to the root is %u.%u\n",
dag->mc.obj.etx / RPL_DAG_MC_ETX_DIVISOR,
(dag->mc.obj.etx % RPL_DAG_MC_ETX_DIVISOR * 100) / RPL_DAG_MC_ETX_DIVISOR);
#elif RPL_DAG_MC == RPL_DAG_MC_ENERGY
dag->mc.type = RPL_DAG_MC_ENERGY;
dag->mc.flags = RPL_DAG_MC_FLAG_P;
dag->mc.aggr = RPL_DAG_MC_AGGR_ADDITIVE;
dag->mc.prec = 0;
dag->mc.length = sizeof(dag->mc.obj.energy);
if(dag->rank == ROOT_RANK(dag)) {
dag->mc.obj.energy.flags = RPL_DAG_MC_ENERGY_TYPE_MAINS << RPL_DAG_MC_ENERGY_TYPE;
type = RPL_DAG_MC_ENERGY_TYPE_MAINS;
} else {
dag->mc.obj.energy.flags = RPL_DAG_MC_ENERGY_TYPE_BATTERY << RPL_DAG_MC_ENERGY_TYPE;
type = RPL_DAG_MC_ENERGY_TYPE_BATTERY;
}
dag->mc.obj.energy.energy_est = calculate_path_metric(dag->preferred_parent);
dag->mc.obj.energy.flags = type << RPL_DAG_MC_ENERGY_TYPE;
dag->mc.obj.energy.energy_est = path_metric;
#else
#error "Unsupported RPL_DAG_MC configured. See rpl.h."
#endif /* RPL_DAG_MC */
}