Function defrouter_delreq

freebsd/netinet6/nd6_rtr.c:712–747

* Remove the default route for a given router. * This is just a subroutine function for defrouter_select_fib(), and * should not be called from anywhere else. */

 * should not be called from anywhere else.
 */
static void
defrouter_delreq(struct nd_defrouter *dr)
{
	struct sockaddr_in6 def, mask, gate;
	struct rt_addrinfo info;
	struct rib_cmd_info rc;
	struct epoch_tracker et;
	unsigned int fibnum;
	int error;

	bzero(&def, sizeof(def));
	bzero(&mask, sizeof(mask));
	bzero(&gate, sizeof(gate));

	def.sin6_len = mask.sin6_len = gate.sin6_len =
	    sizeof(struct sockaddr_in6);
	def.sin6_family = gate.sin6_family = AF_INET6;
	gate.sin6_addr = dr->rtaddr;
	fibnum = dr->ifp->if_fib;

	bzero((caddr_t)&info, sizeof(info));
	info.rti_flags = RTF_GATEWAY;
	info.rti_info[RTAX_DST] = (struct sockaddr *)&def;
	info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&gate;
	info.rti_info[RTAX_NETMASK] = (struct sockaddr *)&mask;

	NET_EPOCH_ENTER(et);
	error = rib_action(fibnum, RTM_DELETE, &info, &rc);
	if (error == 0) {
		struct nhop_object *nh = nhop_select_func(rc.rc_nh_old, 0);
		rt_routemsg(RTM_DELETE, rc.rc_rt, nh, fibnum);
	}
	NET_EPOCH_EXIT(et);

	dr->installed = 0;
}

static void
defrouter_del(struct nd_defrouter *dr)