RTF_BROADCAST
rt->rt_flags |= RTF_BROADCAST;
(RTF_MULTICAST | RTF_BROADCAST | RTF_WASCLONED)) == 0)
isbroadcast = (ro->ro_rt->rt_flags & RTF_BROADCAST);
{ RTF_BROADCAST,'b' },
#ifdef RTF_BROADCAST
{ RTF_BROADCAST, 'b' },
#ifdef RTF_BROADCAST
RTFLAG("b", RTF_BROADCAST);