calc_nexthop
calc_nexthop(w, v, area, rtr_link);
calc_nexthop(w, v, area, rtr_link);
calc_nexthop(w, v, area, rtr_link);
void calc_nexthop(struct vertex *, struct vertex *,
calc_nexthop(w, v, area, rtr_link);
calc_nexthop(w, v, area, rtr_link);
calc_nexthop(w, v, area, rtr_link);
void calc_nexthop(struct vertex *, struct vertex *,