INFINITY_METRIC
if (adj_metric > INFINITY_METRIC)
adj_metric = INFINITY_METRIC;
if (adj_metric < INFINITY_METRIC) {
if (rn->connected && rr->metric <= INFINITY_METRIC)
if (rr->metric < INFINITY_METRIC) {
} else if (rr->metric == INFINITY_METRIC) {
if (rn->cost < INFINITY_METRIC)
} else if (INFINITY_METRIC < rr->metric &&
rr->metric < 2 * INFINITY_METRIC) {
rn->cost = INFINITY_METRIC;
metric = le->re->metric + INFINITY_METRIC;