rti_netmask
rtinfo.rti_netmask = NULL;
rnh->rnh_lookup(rtinfo.rti_dst, rtinfo.rti_netmask, rnh);
rtinfo.rti_netmask = ifa->ifa_netmask;
rtinfo.rti_netmask = rt_mask(rt);
rtinfo.rti_netmask = ifa->ifa_netmask;
rtinfo.rti_netmask = NULL;
rtinfo->rti_netmask = rt_mask(rt);
if (rtinfo.rti_netmask != NULL) {
rtinfo.rti_netmask->sa_len <= sizeof(w->w_mask0),
("mask too long %d", rtinfo.rti_netmask->sa_len));
memcpy(&w->w_mask0, rtinfo.rti_netmask,
rtinfo.rti_netmask->sa_len);
rtinfo->rti_netmask = rt_mask(rt); /* might be NULL */