Function rib_del_route

freebsd/net/route/route_ctl.c:729–760

* Removes route defined by @info from the kernel table specified by @fibnum and * sa_family in @info->rti_info[RTAX_DST]. * * Returns 0 on success and fills in operation metadata into @rc. */

 * Returns 0 on success and fills in operation metadata into @rc.
 */
int
rib_del_route(uint32_t fibnum, struct rt_addrinfo *info, struct rib_cmd_info *rc)
{
	struct rib_head *rnh;
	struct sockaddr *dst_orig, *netmask;
	struct sockaddr_storage mdst;
	int error;

	NET_EPOCH_ASSERT();

	rnh = get_rnh(fibnum, info);
	if (rnh == NULL)
		return (EAFNOSUPPORT);

	bzero(rc, sizeof(struct rib_cmd_info));
	rc->rc_cmd = RTM_DELETE;

	dst_orig = info->rti_info[RTAX_DST];
	netmask = info->rti_info[RTAX_NETMASK];

	if (netmask != NULL) {
		/* Ensure @dst is always properly masked */
		if (dst_orig->sa_len > sizeof(mdst))
			return (EINVAL);
		rt_maskedcopy(dst_orig, (struct sockaddr *)&mdst, netmask);
		info->rti_info[RTAX_DST] = (struct sockaddr *)&mdst;
	}
	error = del_route(rnh, info, rc);
	info->rti_info[RTAX_DST] = dst_orig;

	return (error);
}

/*
 * Conditionally unlinks rtentry matching data inside @info from @rnh.