IPFW_RCFLAG_DYNAMIC
rt.flags |= IPFW_RCFLAG_DYNAMIC;
IPFW_RCFLAG_SET | IPFW_RCFLAG_DYNAMIC)
if (rt->flags & IPFW_RCFLAG_DYNAMIC)
if (rt->flags & IPFW_RCFLAG_DYNAMIC)
if (rt->flags & IPFW_RCFLAG_DYNAMIC) {