change_route_conditional
error = change_route_conditional(rnh, rt, rnd_orig, &rnd_new, rc);
error = change_route_conditional(rnh, rt, rnd_orig, &rnd_new, rc);
return (change_route_conditional(rnh, rt, rnd_orig, &rnd_new, rc));
int change_route_conditional(struct rib_head *rnh, struct rtentry *rt,