Function check_info_match_nhop

freebsd/net/route/route_ctl.c:449–465

* Checks if data in @info matches nexhop @nh. * * Returns 0 on success, * ESRCH if not matched, * ENOENT if filter function returned false */

 * ENOENT if filter function returned false
 */
int
check_info_match_nhop(const struct rt_addrinfo *info, const struct rtentry *rt,
    const struct nhop_object *nh)
{
	const struct sockaddr *gw = info->rti_info[RTAX_GATEWAY];

	if (info->rti_filter != NULL) {
	    if (info->rti_filter(rt, nh, info->rti_filterdata) == 0)
		    return (ENOENT);
	    else
		    return (0);
	}
	if ((gw != NULL) && !match_nhop_gw(nh, gw))
		return (ESRCH);

	return (0);
}

/*
 * Checks if nexhop @nh can be rewritten by data in @info because