bgpd: don't use BGP_ATTR_VNC(255) unless ENABLE_BGP_VNC_ATTR is defined

Signed-off-by: Lou Berger <lberger@labn.net>
bgp_attr_as4_aggregator(struct bgp_attr_parser_args *args,
			as_t *as4_aggregator_as,
			struct in_addr *as4_aggregator_addr)
{
	struct peer *const peer = args->peer;
	struct attr *const attr = args->attr;
	const bgp_size_t length = args->length;

	if (length != 8) {
		flog_err(EC_BGP_ATTR_LEN, "New Aggregator length is not 8 [%d]",
			 length);
		return bgp_attr_malformed(args, BGP_NOTIFY_UPDATE_ATTR_LENG_ERR,
					  0);
	}

	*as4_aggregator_as = stream_getl(peer->curr);
	as4_aggregator_addr->s_addr = stream_get_ipv4(peer->curr);

	attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_AS4_AGGREGATOR);

	return BGP_ATTR_PARSE_PROCEED;
}

bgp_attr_as4_aggregator(struct bgp_attr_parser_args *args,
			as_t *as4_aggregator_as,
			struct in_addr *as4_aggregator_addr)
{
	struct peer *const peer = args->peer;
	struct attr *const attr = args->attr;
	const bgp_size_t length = args->length;

	if (length != 8) {
		flog_err(EC_BGP_ATTR_LEN, "New Aggregator length is not 8 [%d]",
			 length);
		return bgp_attr_malformed(args, BGP_NOTIFY_UPDATE_ATTR_LENG_ERR,
					  0);
	}

	*as4_aggregator_as = stream_getl(peer->curr);
	as4_aggregator_addr->s_addr = stream_get_ipv4(peer->curr);

	attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_AS4_AGGREGATOR);

	return BGP_ATTR_PARSE_PROCEED;
}
