[mirror_frr.git] / bgpd / bgp_label.c

/* BGP carrying label information
 * Copyright (C) 2013 Cumulus Networks, Inc.
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * GNU Zebra is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <zebra.h>

#include "command.h"
#include "thread.h"
#include "prefix.h"
#include "zclient.h"
#include "stream.h"
#include "network.h"
#include "log.h"
#include "memory.h"
#include "nexthop.h"
#include "mpls.h"

#include "bgpd/bgpd.h"
#include "bgpd/bgp_table.h"
#include "bgpd/bgp_route.h"
#include "bgpd/bgp_attr.h"
#include "bgpd/bgp_label.h"
#include "bgpd/bgp_packet.h"
#include "bgpd/bgp_debug.h"
#include "bgpd/bgp_errors.h"

extern struct zclient *zclient;

int bgp_parse_fec_update(void)
{
	struct stream *s;
	struct bgp_node *rn;
	struct bgp *bgp;
	struct bgp_table *table;
	struct prefix p;
	uint32_t label;
	afi_t afi;
	safi_t safi;

	s = zclient->ibuf;

	memset(&p, 0, sizeof(struct prefix));
	p.family = stream_getw(s);
	p.prefixlen = stream_getc(s);
	stream_get(p.u.val, s, PSIZE(p.prefixlen));
	label = stream_getl(s);

	/* hack for the bgp instance & SAFI = have to send/receive it */
	afi = family2afi(p.family);
	safi = SAFI_UNICAST;
	bgp = bgp_get_default();
	if (!bgp) {
		zlog_debug("no default bgp instance");
		return -1;
	}

	table = bgp->rib[afi][safi];
	if (!table) {
		zlog_debug("no %u unicast table", p.family);
		return -1;
	}
	rn = bgp_node_lookup(table, &p);
	if (!rn) {
		zlog_debug("no node for the prefix");
		return -1;
	}

	/* treat it as implicit withdraw - the label is invalid */
	if (label == MPLS_INVALID_LABEL)
		bgp_unset_valid_label(&rn->local_label);
	else {
		label_ntop(label, 1, &rn->local_label);
		bgp_set_valid_label(&rn->local_label);
	}
	SET_FLAG(rn->flags, BGP_NODE_LABEL_CHANGED);
	bgp_unlock_node(rn);
	bgp_process(bgp, rn, afi, safi);
	return 1;
}

mpls_label_t bgp_adv_label(struct bgp_node *rn, struct bgp_info *ri,
			   struct peer *to, afi_t afi, safi_t safi)
{
	struct peer *from;
	mpls_label_t remote_label;
	int reflect;

	if (!rn || !ri || !to)
		return MPLS_INVALID_LABEL;

	remote_label = ri->extra ? ri->extra->label[0] : MPLS_INVALID_LABEL;
	from = ri->peer;
	reflect =
		((from->sort == BGP_PEER_IBGP) && (to->sort == BGP_PEER_IBGP));

	if (reflect
	    && !CHECK_FLAG(to->af_flags[afi][safi],
			   PEER_FLAG_FORCE_NEXTHOP_SELF))
		return remote_label;

	if (CHECK_FLAG(to->af_flags[afi][safi], PEER_FLAG_NEXTHOP_UNCHANGED))
		return remote_label;

	return rn->local_label;
}

void bgp_reg_dereg_for_label(struct bgp_node *rn, struct bgp_info *ri, int reg)
{
	struct stream *s;
	struct prefix *p;
	int command;
	uint16_t flags = 0;
	size_t flags_pos = 0;

	/* Check socket. */
	if (!zclient || zclient->sock < 0)
		return;

	p = &(rn->p);
	s = zclient->obuf;
	stream_reset(s);
	command = (reg) ? ZEBRA_FEC_REGISTER : ZEBRA_FEC_UNREGISTER;
	zclient_create_header(s, command, VRF_DEFAULT);
	flags_pos = stream_get_endp(s); /* save position of 'flags' */
	stream_putw(s, flags);		/* initial flags */
	stream_putw(s, PREFIX_FAMILY(p));
	stream_put_prefix(s, p);
	if (reg) {
		assert(ri);
		if (ri->attr->flag & ATTR_FLAG_BIT(BGP_ATTR_PREFIX_SID)) {
			if (ri->attr->label_index != BGP_INVALID_LABEL_INDEX) {
				flags |= ZEBRA_FEC_REGISTER_LABEL_INDEX;
				stream_putl(s, ri->attr->label_index);
			}
		}
		SET_FLAG(rn->flags, BGP_NODE_REGISTERED_FOR_LABEL);
	} else
		UNSET_FLAG(rn->flags, BGP_NODE_REGISTERED_FOR_LABEL);

	/* Set length and flags */
	stream_putw_at(s, 0, stream_get_endp(s));

	/*
	 * We only need to write new flags if this is a register
	 */
	if (reg)
		stream_putw_at(s, flags_pos, flags);

	zclient_send_message(zclient);
}

static int bgp_nlri_get_labels(struct peer *peer, uint8_t *pnt, uint8_t plen,
			       mpls_label_t *label)
{
	uint8_t *data = pnt;
	uint8_t *lim = pnt + plen;
	uint8_t llen = 0;
	uint8_t label_depth = 0;

	for (; data < lim; data += BGP_LABEL_BYTES) {
		memcpy(label, data, BGP_LABEL_BYTES);
		llen += BGP_LABEL_BYTES;

		bgp_set_valid_label(label);
		label_depth += 1;

		if (bgp_is_withdraw_label(label) || label_bos(label))
			break;
	}

	/* If we RX multiple labels we will end up keeping only the last
	 * one. We do not yet support a label stack greater than 1. */
	if (label_depth > 1)
		zlog_warn("%s rcvd UPDATE with label stack %d deep", peer->host,
			  label_depth);

	if (!(bgp_is_withdraw_label(label) || label_bos(label)))
		zlog_warn(
			"%s rcvd UPDATE with invalid label stack - no bottom of stack",
			peer->host);

	return llen;
}

int bgp_nlri_parse_label(struct peer *peer, struct attr *attr,
			 struct bgp_nlri *packet)
{
	uint8_t *pnt;
	uint8_t *lim;
	struct prefix p;
	int psize = 0;
	int prefixlen;
	afi_t afi;
	safi_t safi;
	int addpath_encoded;
	uint32_t addpath_id;
	mpls_label_t label = MPLS_INVALID_LABEL;
	uint8_t llen;

	pnt = packet->nlri;
	lim = pnt + packet->length;
	afi = packet->afi;
	safi = packet->safi;
	addpath_id = 0;

	addpath_encoded =
		(CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_RX_ADV)
		 && CHECK_FLAG(peer->af_cap[afi][safi],
			       PEER_CAP_ADDPATH_AF_TX_RCV));

	for (; pnt < lim; pnt += psize) {
		/* Clear prefix structure. */
		memset(&p, 0, sizeof(struct prefix));

		if (addpath_encoded) {

			/* When packet overflow occurs return immediately. */
			if (pnt + BGP_ADDPATH_ID_LEN > lim)
				return -1;

			addpath_id = ntohl(*((uint32_t *)pnt));
			pnt += BGP_ADDPATH_ID_LEN;
		}

		/* Fetch prefix length. */
		prefixlen = *pnt++;
		p.family = afi2family(packet->afi);
		psize = PSIZE(prefixlen);

		/* sanity check against packet data */
		if ((pnt + psize) > lim) {
			flog_err(
				BGP_ERR_UPDATE_RCV,
				"%s [Error] Update packet error / L-U (prefix length %d exceeds packet size %u)",
				peer->host, prefixlen, (uint)(lim - pnt));
			return -1;
		}

		/* Fill in the labels */
		llen = bgp_nlri_get_labels(peer, pnt, psize, &label);
		p.prefixlen = prefixlen - BSIZE(llen);

		/* There needs to be at least one label */
		if (prefixlen < 24) {
			flog_err(BGP_ERR_UPDATE_RCV,
				  "%s [Error] Update packet error"
				  " (wrong label length %d)",
				  peer->host, prefixlen);
			bgp_notify_send(peer, BGP_NOTIFY_UPDATE_ERR,
					BGP_NOTIFY_UPDATE_INVAL_NETWORK);
			return -1;
		}

		if ((afi == AFI_IP && p.prefixlen > 32)
		    || (afi == AFI_IP6 && p.prefixlen > 128))
			return -1;

		/* Fetch prefix from NLRI packet */
		memcpy(&p.u.prefix, pnt + llen, psize - llen);

		/* Check address. */
		if (afi == AFI_IP && safi == SAFI_LABELED_UNICAST) {
			if (IN_CLASSD(ntohl(p.u.prefix4.s_addr))) {
				/* From RFC4271 Section 6.3:
				 *
				 * If a prefix in the NLRI field is semantically
				 * incorrect
				 * (e.g., an unexpected multicast IP address),
				 * an error SHOULD
				 * be logged locally, and the prefix SHOULD be
				 * ignored.
				  */
				flog_err(
					BGP_ERR_UPDATE_RCV,
					"%s: IPv4 labeled-unicast NLRI is multicast address %s, ignoring",
					peer->host, inet_ntoa(p.u.prefix4));
				continue;
			}
		}

		/* Check address. */
		if (afi == AFI_IP6 && safi == SAFI_LABELED_UNICAST) {
			if (IN6_IS_ADDR_LINKLOCAL(&p.u.prefix6)) {
				char buf[BUFSIZ];

				flog_err(
					BGP_ERR_UPDATE_RCV,
					"%s: IPv6 labeled-unicast NLRI is link-local address %s, ignoring",
					peer->host,
					inet_ntop(AF_INET6, &p.u.prefix6, buf,
						  BUFSIZ));

				continue;
			}

			if (IN6_IS_ADDR_MULTICAST(&p.u.prefix6)) {
				char buf[BUFSIZ];

				flog_err(
					BGP_ERR_UPDATE_RCV,
					"%s: IPv6 unicast NLRI is multicast address %s, ignoring",
					peer->host,
					inet_ntop(AF_INET6, &p.u.prefix6, buf,
						  BUFSIZ));

				continue;
			}
		}

		if (attr) {
			bgp_update(peer, &p, addpath_id, attr, packet->afi,
				   SAFI_UNICAST, ZEBRA_ROUTE_BGP,
				   BGP_ROUTE_NORMAL, NULL, &label, 1, 0, NULL);
		} else {
			bgp_withdraw(peer, &p, addpath_id, attr, packet->afi,
				     SAFI_UNICAST, ZEBRA_ROUTE_BGP,
				     BGP_ROUTE_NORMAL, NULL, &label, 1, NULL);
		}
	}

	/* Packet length consistency check. */
	if (pnt != lim) {
		flog_err(
			BGP_ERR_UPDATE_RCV,
			"%s [Error] Update packet error / L-U (%zu data remaining after parsing)",
			peer->host, lim - pnt);
		return -1;
	}

	return 0;
}
Commit	Line	Data
cd1964ff DS	1	/* BGP carrying label information
	2	* Copyright (C) 2013 Cumulus Networks, Inc.
	3	*
	4	* This file is part of GNU Zebra.
	5	*
	6	* GNU Zebra is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2, or (at your option) any
	9	* later version.
	10	*
	11	* GNU Zebra is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* General Public License for more details.
	15	*
896014f4 DL	16	* You should have received a copy of the GNU General Public License along
	17	* with this program; see the file COPYING; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
cd1964ff DS	19	*/
	20
	21	#include <zebra.h>
	22
	23	#include "command.h"
	24	#include "thread.h"
	25	#include "prefix.h"
	26	#include "zclient.h"
	27	#include "stream.h"
	28	#include "network.h"
	29	#include "log.h"
	30	#include "memory.h"
	31	#include "nexthop.h"
	32	#include "mpls.h"
	33
	34	#include "bgpd/bgpd.h"
	35	#include "bgpd/bgp_table.h"
	36	#include "bgpd/bgp_route.h"
	37	#include "bgpd/bgp_attr.h"
	38	#include "bgpd/bgp_label.h"
	39	#include "bgpd/bgp_packet.h"
	40	#include "bgpd/bgp_debug.h"
14454c9f	41	#include "bgpd/bgp_errors.h"
cd1964ff DS	42
	43	extern struct zclient *zclient;
	44
d62a17ae	45	int bgp_parse_fec_update(void)
cd1964ff	46	{
d62a17ae	47	struct stream *s;
	48	struct bgp_node *rn;
	49	struct bgp *bgp;
	50	struct bgp_table *table;
	51	struct prefix p;
d7c0a89a	52	uint32_t label;
d62a17ae	53	afi_t afi;
	54	safi_t safi;
	55
	56	s = zclient->ibuf;
	57
	58	memset(&p, 0, sizeof(struct prefix));
	59	p.family = stream_getw(s);
	60	p.prefixlen = stream_getc(s);
a85297a7	61	stream_get(p.u.val, s, PSIZE(p.prefixlen));
d62a17ae	62	label = stream_getl(s);
	63
	64	/* hack for the bgp instance & SAFI = have to send/receive it */
	65	afi = family2afi(p.family);
	66	safi = SAFI_UNICAST;
	67	bgp = bgp_get_default();
	68	if (!bgp) {
	69	zlog_debug("no default bgp instance");
	70	return -1;
	71	}
	72
	73	table = bgp->rib[afi][safi];
	74	if (!table) {
	75	zlog_debug("no %u unicast table", p.family);
	76	return -1;
	77	}
	78	rn = bgp_node_lookup(table, &p);
	79	if (!rn) {
	80	zlog_debug("no node for the prefix");
	81	return -1;
	82	}
	83
	84	/* treat it as implicit withdraw - the label is invalid */
	85	if (label == MPLS_INVALID_LABEL)
	86	bgp_unset_valid_label(&rn->local_label);
	87	else {
	88	label_ntop(label, 1, &rn->local_label);
	89	bgp_set_valid_label(&rn->local_label);
	90	}
	91	SET_FLAG(rn->flags, BGP_NODE_LABEL_CHANGED);
	92	bgp_unlock_node(rn);
	93	bgp_process(bgp, rn, afi, safi);
	94	return 1;
cd1964ff DS	95	}
cd1964ff DS	96
d62a17ae	97	mpls_label_t bgp_adv_label(struct bgp_node rn, struct bgp_info ri,
d62a17ae	98	struct peer *to, afi_t afi, safi_t safi)
cd1964ff	99	{
d62a17ae	100	struct peer *from;
	101	mpls_label_t remote_label;
	102	int reflect;
cd1964ff	103
d62a17ae	104	if (!rn \|\| !ri \|\| !to)
d62a17ae	105	return MPLS_INVALID_LABEL;
cd1964ff	106
b57ba6d2	107	remote_label = ri->extra ? ri->extra->label[0] : MPLS_INVALID_LABEL;
d62a17ae	108	from = ri->peer;
	109	reflect =
	110	((from->sort == BGP_PEER_IBGP) && (to->sort == BGP_PEER_IBGP));
cd1964ff	111
d62a17ae	112	if (reflect
	113	&& !CHECK_FLAG(to->af_flags[afi][safi],
	114	PEER_FLAG_FORCE_NEXTHOP_SELF))
	115	return remote_label;
cd1964ff	116
d62a17ae	117	if (CHECK_FLAG(to->af_flags[afi][safi], PEER_FLAG_NEXTHOP_UNCHANGED))
d62a17ae	118	return remote_label;
cd1964ff	119
d62a17ae	120	return rn->local_label;
cd1964ff DS	121	}
cd1964ff DS	122
d62a17ae	123	void bgp_reg_dereg_for_label(struct bgp_node rn, struct bgp_info ri, int reg)
cd1964ff	124	{
d62a17ae	125	struct stream *s;
	126	struct prefix *p;
	127	int command;
d7c0a89a	128	uint16_t flags = 0;
d62a17ae	129	size_t flags_pos = 0;
	130
	131	/* Check socket. */
	132	if (!zclient \|\| zclient->sock < 0)
	133	return;
	134
	135	p = &(rn->p);
	136	s = zclient->obuf;
	137	stream_reset(s);
	138	command = (reg) ? ZEBRA_FEC_REGISTER : ZEBRA_FEC_UNREGISTER;
	139	zclient_create_header(s, command, VRF_DEFAULT);
	140	flags_pos = stream_get_endp(s); /* save position of 'flags' */
	141	stream_putw(s, flags); /* initial flags */
	142	stream_putw(s, PREFIX_FAMILY(p));
	143	stream_put_prefix(s, p);
	144	if (reg) {
	145	assert(ri);
	146	if (ri->attr->flag & ATTR_FLAG_BIT(BGP_ATTR_PREFIX_SID)) {
	147	if (ri->attr->label_index != BGP_INVALID_LABEL_INDEX) {
	148	flags \|= ZEBRA_FEC_REGISTER_LABEL_INDEX;
	149	stream_putl(s, ri->attr->label_index);
	150	}
	151	}
	152	SET_FLAG(rn->flags, BGP_NODE_REGISTERED_FOR_LABEL);
	153	} else
	154	UNSET_FLAG(rn->flags, BGP_NODE_REGISTERED_FOR_LABEL);
	155
	156	/* Set length and flags */
	157	stream_putw_at(s, 0, stream_get_endp(s));
e0b84ba1 DS	158
	159	/*
	160	* We only need to write new flags if this is a register
	161	*/
	162	if (reg)
	163	stream_putw_at(s, flags_pos, flags);
d62a17ae	164
d62a17ae	165	zclient_send_message(zclient);
cd1964ff DS	166	}
cd1964ff DS	167
d7c0a89a	168	static int bgp_nlri_get_labels(struct peer peer, uint8_t pnt, uint8_t plen,
d62a17ae	169	mpls_label_t *label)
cd1964ff	170	{
d7c0a89a QY	171	uint8_t *data = pnt;
	172	uint8_t *lim = pnt + plen;
	173	uint8_t llen = 0;
	174	uint8_t label_depth = 0;
d62a17ae	175
	176	for (; data < lim; data += BGP_LABEL_BYTES) {
	177	memcpy(label, data, BGP_LABEL_BYTES);
	178	llen += BGP_LABEL_BYTES;
	179
	180	bgp_set_valid_label(label);
	181	label_depth += 1;
	182
	183	if (bgp_is_withdraw_label(label) \|\| label_bos(label))
	184	break;
	185	}
	186
	187	/* If we RX multiple labels we will end up keeping only the last
	188	* one. We do not yet support a label stack greater than 1. */
	189	if (label_depth > 1)
	190	zlog_warn("%s rcvd UPDATE with label stack %d deep", peer->host,
	191	label_depth);
	192
	193	if (!(bgp_is_withdraw_label(label) \|\| label_bos(label)))
	194	zlog_warn(
	195	"%s rcvd UPDATE with invalid label stack - no bottom of stack",
	196	peer->host);
	197
	198	return llen;
cd1964ff DS	199	}
cd1964ff DS	200
d62a17ae	201	int bgp_nlri_parse_label(struct peer peer, struct attr attr,
d62a17ae	202	struct bgp_nlri *packet)
cd1964ff	203	{
d7c0a89a QY	204	uint8_t *pnt;
d7c0a89a QY	205	uint8_t *lim;
d62a17ae	206	struct prefix p;
	207	int psize = 0;
	208	int prefixlen;
	209	afi_t afi;
	210	safi_t safi;
	211	int addpath_encoded;
d7c0a89a	212	uint32_t addpath_id;
d62a17ae	213	mpls_label_t label = MPLS_INVALID_LABEL;
d7c0a89a	214	uint8_t llen;
d62a17ae	215
d62a17ae	216	pnt = packet->nlri;
	217	lim = pnt + packet->length;
	218	afi = packet->afi;
	219	safi = packet->safi;
	220	addpath_id = 0;
	221
	222	addpath_encoded =
	223	(CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ADDPATH_AF_RX_ADV)
	224	&& CHECK_FLAG(peer->af_cap[afi][safi],
	225	PEER_CAP_ADDPATH_AF_TX_RCV));
	226
	227	for (; pnt < lim; pnt += psize) {
	228	/* Clear prefix structure. */
	229	memset(&p, 0, sizeof(struct prefix));
d62a17ae	230
	231	if (addpath_encoded) {
	232
	233	/* When packet overflow occurs return immediately. */
	234	if (pnt + BGP_ADDPATH_ID_LEN > lim)
	235	return -1;
	236
	237	addpath_id = ntohl(((uint32_t )pnt));
	238	pnt += BGP_ADDPATH_ID_LEN;
	239	}
	240
	241	/* Fetch prefix length. */
	242	prefixlen = *pnt++;
	243	p.family = afi2family(packet->afi);
	244	psize = PSIZE(prefixlen);
	245
	246	/* sanity check against packet data */
	247	if ((pnt + psize) > lim) {
af4c2728	248	flog_err(
14454c9f	249	BGP_ERR_UPDATE_RCV,
d62a17ae	250	"%s [Error] Update packet error / L-U (prefix length %d exceeds packet size %u)",
	251	peer->host, prefixlen, (uint)(lim - pnt));
	252	return -1;
	253	}
	254
	255	/* Fill in the labels */
	256	llen = bgp_nlri_get_labels(peer, pnt, psize, &label);
	257	p.prefixlen = prefixlen - BSIZE(llen);
	258
	259	/* There needs to be at least one label */
	260	if (prefixlen < 24) {
af4c2728	261	flog_err(BGP_ERR_UPDATE_RCV,
14454c9f DS	262	"%s [Error] Update packet error"
	263	" (wrong label length %d)",
	264	peer->host, prefixlen);
d62a17ae	265	bgp_notify_send(peer, BGP_NOTIFY_UPDATE_ERR,
	266	BGP_NOTIFY_UPDATE_INVAL_NETWORK);
	267	return -1;
	268	}
	269
	270	if ((afi == AFI_IP && p.prefixlen > 32)
	271	\|\| (afi == AFI_IP6 && p.prefixlen > 128))
	272	return -1;
	273
	274	/* Fetch prefix from NLRI packet */
	275	memcpy(&p.u.prefix, pnt + llen, psize - llen);
	276
	277	/* Check address. */
	278	if (afi == AFI_IP && safi == SAFI_LABELED_UNICAST) {
	279	if (IN_CLASSD(ntohl(p.u.prefix4.s_addr))) {
	280	/* From RFC4271 Section 6.3:
	281	*
	282	* If a prefix in the NLRI field is semantically
	283	* incorrect
	284	* (e.g., an unexpected multicast IP address),
	285	* an error SHOULD
	286	* be logged locally, and the prefix SHOULD be
	287	* ignored.
9d303b37	288	*/
af4c2728	289	flog_err(
14454c9f	290	BGP_ERR_UPDATE_RCV,
d62a17ae	291	"%s: IPv4 labeled-unicast NLRI is multicast address %s, ignoring",
	292	peer->host, inet_ntoa(p.u.prefix4));
	293	continue;
	294	}
	295	}
	296
	297	/* Check address. */
	298	if (afi == AFI_IP6 && safi == SAFI_LABELED_UNICAST) {
	299	if (IN6_IS_ADDR_LINKLOCAL(&p.u.prefix6)) {
	300	char buf[BUFSIZ];
	301
af4c2728	302	flog_err(
14454c9f	303	BGP_ERR_UPDATE_RCV,
d62a17ae	304	"%s: IPv6 labeled-unicast NLRI is link-local address %s, ignoring",
	305	peer->host,
	306	inet_ntop(AF_INET6, &p.u.prefix6, buf,
	307	BUFSIZ));
	308
	309	continue;
	310	}
	311
	312	if (IN6_IS_ADDR_MULTICAST(&p.u.prefix6)) {
	313	char buf[BUFSIZ];
	314
af4c2728	315	flog_err(
14454c9f	316	BGP_ERR_UPDATE_RCV,
d62a17ae	317	"%s: IPv6 unicast NLRI is multicast address %s, ignoring",
	318	peer->host,
	319	inet_ntop(AF_INET6, &p.u.prefix6, buf,
	320	BUFSIZ));
	321
	322	continue;
	323	}
	324	}
	325
	326	if (attr) {
	327	bgp_update(peer, &p, addpath_id, attr, packet->afi,
	328	SAFI_UNICAST, ZEBRA_ROUTE_BGP,
b57ba6d2	329	BGP_ROUTE_NORMAL, NULL, &label, 1, 0, NULL);
d62a17ae	330	} else {
	331	bgp_withdraw(peer, &p, addpath_id, attr, packet->afi,
	332	SAFI_UNICAST, ZEBRA_ROUTE_BGP,
b57ba6d2	333	BGP_ROUTE_NORMAL, NULL, &label, 1, NULL);
d62a17ae	334	}
	335	}
	336
	337	/* Packet length consistency check. */
	338	if (pnt != lim) {
af4c2728	339	flog_err(
14454c9f	340	BGP_ERR_UPDATE_RCV,
d62a17ae	341	"%s [Error] Update packet error / L-U (%zu data remaining after parsing)",
	342	peer->host, lim - pnt);
	343	return -1;
	344	}
	345
	346	return 0;
cd1964ff	347	}