[mirror_frr.git] / bgpd / bgp_mac.c

/*
 * BGPd - Mac hash code
 * Copyright (C) 2018 Cumulus Networks, Inc.
 *               Donald Sharp
 *
 * This program 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 of the License, or (at your option)
 * any later version.
 *
 * This program 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 <jhash.h>
#include <hash.h>
#include <prefix.h>
#include <memory.h>

#include "bgpd/bgpd.h"
#include "bgpd/bgp_mac.h"
#include "bgpd/bgp_memory.h"
#include "bgpd/bgp_route.h"
#include "bgpd/bgp_packet.h"
#include "bgpd/bgp_rd.h"
#include "bgpd/bgp_debug.h"
#include "bgpd/bgp_evpn_private.h"

DEFINE_MTYPE_STATIC(BGPD, BSM, "Mac Hash Entry");
DEFINE_MTYPE_STATIC(BGPD, BSM_STRING, "Mac Hash Entry Intf String");

struct bgp_self_mac {
	struct ethaddr macaddr;
	struct list *ifp_list;
};

static unsigned int bgp_mac_hash_key_make(const void *data)
{
	const struct bgp_self_mac *bsm = data;

	return jhash(&bsm->macaddr, ETH_ALEN, 0xa5a5dead);
}

static bool bgp_mac_hash_cmp(const void *d1, const void *d2)
{
	const struct bgp_self_mac *bsm1 = d1;
	const struct bgp_self_mac *bsm2 = d2;

	if (memcmp(&bsm1->macaddr, &bsm2->macaddr, ETH_ALEN) == 0)
		return true;

	return false;
}

void bgp_mac_init(void)
{
	bm->self_mac_hash = hash_create(bgp_mac_hash_key_make, bgp_mac_hash_cmp,
					"BGP MAC Hash");
}

static void bgp_mac_hash_free(void *data)
{
	struct bgp_self_mac *bsm = data;

	if (bsm->ifp_list)
		list_delete(&bsm->ifp_list);

	XFREE(MTYPE_BSM, bsm);
}

void bgp_mac_finish(void)
{
	hash_clean(bm->self_mac_hash, bgp_mac_hash_free);
	hash_free(bm->self_mac_hash);
}

static void bgp_mac_hash_interface_string_del(void *val)
{
	char *data = val;

	XFREE(MTYPE_BSM_STRING, data);
}

static void *bgp_mac_hash_alloc(void *p)
{
	const struct bgp_self_mac *orig = p;
	struct bgp_self_mac *bsm;

	bsm = XCALLOC(MTYPE_BSM, sizeof(struct bgp_self_mac));
	memcpy(&bsm->macaddr, &orig->macaddr, ETH_ALEN);

	bsm->ifp_list = list_new();
	bsm->ifp_list->del = bgp_mac_hash_interface_string_del;

	return bsm;
}

struct bgp_mac_find_internal {
	struct bgp_self_mac *bsm;
	const char *ifname;
};

static void bgp_mac_find_ifp_internal(struct hash_bucket *bucket, void *arg)
{
	struct bgp_mac_find_internal *bmfi = arg;
	struct bgp_self_mac *bsm = bucket->data;
	struct listnode *node;
	char *name;

	for (ALL_LIST_ELEMENTS_RO(bsm->ifp_list, node, name)) {
		if (strcmp(name, bmfi->ifname) == 0) {
			bmfi->bsm = bsm;
			return;
		}
	}
}

static struct bgp_self_mac *bgp_mac_find_interface_name(const char *ifname)
{
	struct bgp_mac_find_internal bmfi;

	bmfi.bsm = NULL;
	bmfi.ifname = ifname;
	hash_iterate(bm->self_mac_hash, bgp_mac_find_ifp_internal, &bmfi);

	return bmfi.bsm;
}

static void bgp_process_mac_rescan_table(struct bgp *bgp, struct peer *peer,
					 struct bgp_table *table,
					 struct ethaddr *macaddr)
{
	struct bgp_dest *pdest, *dest;
	struct bgp_path_info *pi;

	for (pdest = bgp_table_top(table); pdest;
	     pdest = bgp_route_next(pdest)) {
		struct bgp_table *sub = pdest->info;
		const struct prefix *pdest_p = bgp_dest_get_prefix(pdest);

		if (!sub)
			continue;

		for (dest = bgp_table_top(sub); dest;
		     dest = bgp_route_next(dest)) {
			bool dest_affected;
			const struct prefix *p = bgp_dest_get_prefix(dest);
			struct prefix_evpn *pevpn = (struct prefix_evpn *)dest;
			struct prefix_rd prd;
			uint32_t num_labels = 0;
			mpls_label_t *label_pnt = NULL;
			struct bgp_route_evpn *evpn;

			if (pevpn->family == AF_EVPN
			    && pevpn->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE
			    && memcmp(&p->u.prefix_evpn.macip_addr.mac, macaddr,
				      ETH_ALEN)
				       == 0)
				dest_affected = true;
			else
				dest_affected = false;

			for (pi = dest->info; pi; pi = pi->next) {
				if (pi->peer == peer)
					break;
			}

			if (!pi)
				continue;

			/*
			 * If the mac address is not the same then
			 * we don't care and since we are looking
			 */
			if ((memcmp(&pi->attr->rmac, macaddr, ETH_ALEN) != 0)
			    && !dest_affected)
				continue;

			if (pi->extra)
				num_labels = pi->extra->num_labels;
			if (num_labels)
				label_pnt = &pi->extra->label[0];

			prd.family = AF_UNSPEC;
			prd.prefixlen = 64;
			memcpy(&prd.val, pdest_p->u.val, 8);

			if (CHECK_FLAG(pi->flags, BGP_PATH_REMOVED)) {
				if (bgp_debug_update(peer, p, NULL, 1)) {
					char pfx_buf[BGP_PRD_PATH_STRLEN];

					bgp_debug_rdpfxpath2str(
						AFI_L2VPN, SAFI_EVPN, &prd,
						p, label_pnt, num_labels,
						pi->addpath_rx_id ? 1 : 0,
						pi->addpath_rx_id, NULL,
						pfx_buf, sizeof(pfx_buf));
					zlog_debug(
						   "%s skip update of %s marked as removed",
						   peer->host, pfx_buf);
				}
				continue;
			}

			memcpy(&evpn, bgp_attr_get_evpn_overlay(pi->attr),
			       sizeof(evpn));
			int32_t ret = bgp_update(peer, p,
						 pi->addpath_rx_id,
						 pi->attr, AFI_L2VPN, SAFI_EVPN,
						 ZEBRA_ROUTE_BGP,
						 BGP_ROUTE_NORMAL, &prd,
						 label_pnt, num_labels,
						 1, evpn);

			if (ret < 0)
				bgp_dest_unlock_node(dest);
		}
	}
}

static void bgp_mac_rescan_evpn_table(struct bgp *bgp, struct ethaddr *macaddr)
{
	struct listnode *node;
	struct peer *peer;
	safi_t safi;
	afi_t afi;

	afi = AFI_L2VPN;
	safi = SAFI_EVPN;
	for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) {

		if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
			continue;

		if (!peer_established(peer))
			continue;

		if (bgp_debug_update(peer, NULL, NULL, 1))
			zlog_debug(
				"Processing EVPN MAC interface change on peer %s %s",
				peer->host,
				CHECK_FLAG(peer->af_flags[afi][safi],
					   PEER_FLAG_SOFT_RECONFIG)
					? "(inbound, soft-reconfig)"
					: "");

		if (!bgp_soft_reconfig_in(peer, afi, safi)) {
			struct bgp_table *table = bgp->rib[afi][safi];

			bgp_process_mac_rescan_table(bgp, peer, table, macaddr);
		}
	}
}

static void bgp_mac_rescan_all_evpn_tables(struct ethaddr *macaddr)
{
	struct listnode *node;
	struct bgp *bgp;

	for (ALL_LIST_ELEMENTS_RO(bm->bgp, node, bgp)) {
		struct bgp_table *table = bgp->rib[AFI_L2VPN][SAFI_EVPN];

		if (table)
			bgp_mac_rescan_evpn_table(bgp, macaddr);
	}
}

static void bgp_mac_remove_ifp_internal(struct bgp_self_mac *bsm, char *ifname,
					struct ethaddr *macaddr)
{
	struct listnode *node = NULL;
	char *name;

	for (ALL_LIST_ELEMENTS_RO(bsm->ifp_list, node, name)) {
		if (strcmp(name, ifname) == 0)
			break;
	}

	if (node) {
		list_delete_node(bsm->ifp_list, node);
		XFREE(MTYPE_BSM_STRING, name);
	}

	if (bsm->ifp_list->count == 0) {
		struct ethaddr mac = *macaddr;

		hash_release(bm->self_mac_hash, bsm);
		list_delete(&bsm->ifp_list);
		XFREE(MTYPE_BSM, bsm);

		bgp_mac_rescan_all_evpn_tables(&mac);
	}
}

void bgp_mac_add_mac_entry(struct interface *ifp)
{
	struct bgp_self_mac lookup;
	struct bgp_self_mac *bsm;
	struct bgp_self_mac *old_bsm;
	char *ifname;

	memcpy(&lookup.macaddr, &ifp->hw_addr, ETH_ALEN);
	bsm = hash_get(bm->self_mac_hash, &lookup, bgp_mac_hash_alloc);

	/*
	 * Does this happen to be a move
	 */
	old_bsm = bgp_mac_find_interface_name(ifp->name);
	ifname = XSTRDUP(MTYPE_BSM_STRING, ifp->name);

	if (bsm->ifp_list->count == 0) {

		listnode_add(bsm->ifp_list, ifname);
		if (old_bsm)
			bgp_mac_remove_ifp_internal(old_bsm, ifname,
						    &old_bsm->macaddr);
	} else {
		/*
		 * If old mac address is the same as the new,
		 * then there is nothing to do here
		 */
		if (old_bsm == bsm) {
			XFREE(MTYPE_BSM_STRING, ifname);
			return;
		}

		if (old_bsm)
			bgp_mac_remove_ifp_internal(old_bsm, ifp->name,
						    &old_bsm->macaddr);

		listnode_add(bsm->ifp_list, ifname);
	}

	bgp_mac_rescan_all_evpn_tables(&bsm->macaddr);
}

void bgp_mac_del_mac_entry(struct interface *ifp)
{
	struct bgp_self_mac lookup;
	struct bgp_self_mac *bsm;

	memcpy(&lookup.macaddr, &ifp->hw_addr, ETH_ALEN);
	bsm = hash_lookup(bm->self_mac_hash, &lookup);
	if (!bsm)
		return;

	/*
	 * Write code to allow old mac address to no-longer
	 * win if we happen to have received it from a peer.
	 */
	bgp_mac_remove_ifp_internal(bsm, ifp->name, &bsm->macaddr);
}

/* This API checks MAC address against any of local
 * assigned (SVIs) MAC address.
 * An example: router-mac attribute in any of evpn update
 * requires to compare against local mac.
 */
bool bgp_mac_exist(const struct ethaddr *mac)
{
	struct bgp_self_mac lookup;
	struct bgp_self_mac *bsm;
	static uint8_t tmp [ETHER_ADDR_STRLEN] = {0};

	if (memcmp(mac, &tmp, ETH_ALEN) == 0)
		return false;

	memcpy(&lookup.macaddr, mac, ETH_ALEN);
	bsm = hash_lookup(bm->self_mac_hash, &lookup);
	if (!bsm)
		return false;

	return true;
}

/* This API checks EVPN type-2 prefix and comapares
 * mac against any of local assigned (SVIs) MAC
 * address.
 */
bool bgp_mac_entry_exists(const struct prefix *p)
{
	const struct prefix_evpn *pevpn = (const struct prefix_evpn *)p;

	if (pevpn->family != AF_EVPN)
		return false;

	if (pevpn->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE)
		return false;

	return bgp_mac_exist(&p->u.prefix_evpn.macip_addr.mac);

	return true;
}

static void bgp_mac_show_mac_entry(struct hash_bucket *bucket, void *arg)
{
	struct vty *vty = arg;
	struct bgp_self_mac *bsm = bucket->data;
	struct listnode *node;
	char *name;
	char buf_mac[ETHER_ADDR_STRLEN];

	vty_out(vty, "Mac Address: %s ",
		prefix_mac2str(&bsm->macaddr, buf_mac, sizeof(buf_mac)));

	for (ALL_LIST_ELEMENTS_RO(bsm->ifp_list, node, name))
		vty_out(vty, "%s ", name);

	vty_out(vty, "\n");
}

void bgp_mac_dump_table(struct vty *vty)
{
	hash_iterate(bm->self_mac_hash, bgp_mac_show_mac_entry, vty);
}
Commit	Line	Data
48ecf8f5 DS	1	/*
	2	* BGPd - Mac hash code
	3	* Copyright (C) 2018 Cumulus Networks, Inc.
	4	* Donald Sharp
	5	*
	6	* This program 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 Free
	8	* Software Foundation; either version 2 of the License, or (at your option)
	9	* any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful, but WITHOUT
	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	14	* more details.
	15	*
	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
	19	*/
	20	#include <zebra.h>
	21
	22	#include <jhash.h>
	23	#include <hash.h>
	24	#include <prefix.h>
	25	#include <memory.h>
	26
	27	#include "bgpd/bgpd.h"
	28	#include "bgpd/bgp_mac.h"
	29	#include "bgpd/bgp_memory.h"
	30	#include "bgpd/bgp_route.h"
	31	#include "bgpd/bgp_packet.h"
c869b3f8	32	#include "bgpd/bgp_rd.h"
48ecf8f5	33	#include "bgpd/bgp_debug.h"
4e802e66	34	#include "bgpd/bgp_evpn_private.h"
48ecf8f5 DS	35
48ecf8f5 DS	36	DEFINE_MTYPE_STATIC(BGPD, BSM, "Mac Hash Entry");
2a99175f	37	DEFINE_MTYPE_STATIC(BGPD, BSM_STRING, "Mac Hash Entry Intf String");
48ecf8f5 DS	38
	39	struct bgp_self_mac {
	40	struct ethaddr macaddr;
	41	struct list *ifp_list;
	42	};
	43
d8b87afe	44	static unsigned int bgp_mac_hash_key_make(const void *data)
48ecf8f5	45	{
d8b87afe	46	const struct bgp_self_mac *bsm = data;
48ecf8f5 DS	47
	48	return jhash(&bsm->macaddr, ETH_ALEN, 0xa5a5dead);
	49	}
	50
	51	static bool bgp_mac_hash_cmp(const void d1, const void d2)
	52	{
	53	const struct bgp_self_mac *bsm1 = d1;
	54	const struct bgp_self_mac *bsm2 = d2;
	55
	56	if (memcmp(&bsm1->macaddr, &bsm2->macaddr, ETH_ALEN) == 0)
	57	return true;
	58
	59	return false;
	60	}
	61
	62	void bgp_mac_init(void)
	63	{
	64	bm->self_mac_hash = hash_create(bgp_mac_hash_key_make, bgp_mac_hash_cmp,
	65	"BGP MAC Hash");
	66	}
	67
	68	static void bgp_mac_hash_free(void *data)
	69	{
	70	struct bgp_self_mac *bsm = data;
	71
4e802e66 DS	72	if (bsm->ifp_list)
	73	list_delete(&bsm->ifp_list);
	74
48ecf8f5 DS	75	XFREE(MTYPE_BSM, bsm);
	76	}
	77
	78	void bgp_mac_finish(void)
	79	{
	80	hash_clean(bm->self_mac_hash, bgp_mac_hash_free);
	81	hash_free(bm->self_mac_hash);
	82	}
	83
6a69ac51 DS	84	static void bgp_mac_hash_interface_string_del(void *val)
	85	{
	86	char *data = val;
	87
	88	XFREE(MTYPE_BSM_STRING, data);
	89	}
	90
	91	static void bgp_mac_hash_alloc(void p)
	92	{
	93	const struct bgp_self_mac *orig = p;
	94	struct bgp_self_mac *bsm;
	95
	96	bsm = XCALLOC(MTYPE_BSM, sizeof(struct bgp_self_mac));
	97	memcpy(&bsm->macaddr, &orig->macaddr, ETH_ALEN);
	98
	99	bsm->ifp_list = list_new();
	100	bsm->ifp_list->del = bgp_mac_hash_interface_string_del;
	101
	102	return bsm;
	103	}
	104
	105	struct bgp_mac_find_internal {
	106	struct bgp_self_mac *bsm;
	107	const char *ifname;
	108	};
	109
e3b78da8	110	static void bgp_mac_find_ifp_internal(struct hash_bucket bucket, void arg)
6a69ac51 DS	111	{
6a69ac51 DS	112	struct bgp_mac_find_internal *bmfi = arg;
e3b78da8	113	struct bgp_self_mac *bsm = bucket->data;
6a69ac51 DS	114	struct listnode *node;
	115	char *name;
	116
	117	for (ALL_LIST_ELEMENTS_RO(bsm->ifp_list, node, name)) {
	118	if (strcmp(name, bmfi->ifname) == 0) {
	119	bmfi->bsm = bsm;
	120	return;
	121	}
	122	}
	123	}
	124
	125	static struct bgp_self_mac bgp_mac_find_interface_name(const char ifname)
	126	{
	127	struct bgp_mac_find_internal bmfi;
	128
	129	bmfi.bsm = NULL;
	130	bmfi.ifname = ifname;
	131	hash_iterate(bm->self_mac_hash, bgp_mac_find_ifp_internal, &bmfi);
	132
	133	return bmfi.bsm;
	134	}
	135
4e802e66	136	static void bgp_process_mac_rescan_table(struct bgp bgp, struct peer peer,
78869ebf DS	137	struct bgp_table *table,
78869ebf DS	138	struct ethaddr *macaddr)
4e802e66	139	{
9bcb3eef	140	struct bgp_dest pdest, dest;
4e802e66	141	struct bgp_path_info *pi;
4e802e66	142
9bcb3eef DS	143	for (pdest = bgp_table_top(table); pdest;
	144	pdest = bgp_route_next(pdest)) {
	145	struct bgp_table *sub = pdest->info;
	146	const struct prefix *pdest_p = bgp_dest_get_prefix(pdest);
4e802e66 DS	147
	148	if (!sub)
	149	continue;
	150
9bcb3eef DS	151	for (dest = bgp_table_top(sub); dest;
	152	dest = bgp_route_next(dest)) {
	153	bool dest_affected;
	154	const struct prefix *p = bgp_dest_get_prefix(dest);
	155	struct prefix_evpn pevpn = (struct prefix_evpn )dest;
4e802e66 DS	156	struct prefix_rd prd;
	157	uint32_t num_labels = 0;
	158	mpls_label_t *label_pnt = NULL;
6c924775	159	struct bgp_route_evpn *evpn;
4e802e66	160
9bcb3eef DS	161	if (pevpn->family == AF_EVPN
	162	&& pevpn->prefix.route_type == BGP_EVPN_MAC_IP_ROUTE
	163	&& memcmp(&p->u.prefix_evpn.macip_addr.mac, macaddr,
	164	ETH_ALEN)
	165	== 0)
	166	dest_affected = true;
78869ebf	167	else
9bcb3eef	168	dest_affected = false;
78869ebf	169
9bcb3eef	170	for (pi = dest->info; pi; pi = pi->next) {
4e802e66 DS	171	if (pi->peer == peer)
	172	break;
	173	}
	174
	175	if (!pi)
	176	continue;
	177
78869ebf DS	178	/*
	179	* If the mac address is not the same then
	180	* we don't care and since we are looking
	181	*/
9bcb3eef DS	182	if ((memcmp(&pi->attr->rmac, macaddr, ETH_ALEN) != 0)
9bcb3eef DS	183	&& !dest_affected)
78869ebf DS	184	continue;
78869ebf DS	185
4e802e66 DS	186	if (pi->extra)
	187	num_labels = pi->extra->num_labels;
	188	if (num_labels)
	189	label_pnt = &pi->extra->label[0];
	190
	191	prd.family = AF_UNSPEC;
	192	prd.prefixlen = 64;
9bcb3eef	193	memcpy(&prd.val, pdest_p->u.val, 8);
4e802e66	194
c869b3f8	195	if (CHECK_FLAG(pi->flags, BGP_PATH_REMOVED)) {
b54892e0	196	if (bgp_debug_update(peer, p, NULL, 1)) {
c869b3f8 CS	197	char pfx_buf[BGP_PRD_PATH_STRLEN];
	198
	199	bgp_debug_rdpfxpath2str(
	200	AFI_L2VPN, SAFI_EVPN, &prd,
b54892e0	201	p, label_pnt, num_labels,
c869b3f8	202	pi->addpath_rx_id ? 1 : 0,
6c995628 AD	203	pi->addpath_rx_id, NULL,
6c995628 AD	204	pfx_buf, sizeof(pfx_buf));
c869b3f8 CS	205	zlog_debug(
	206	"%s skip update of %s marked as removed",
	207	peer->host, pfx_buf);
	208	}
	209	continue;
	210	}
	211
6c924775 DS	212	memcpy(&evpn, bgp_attr_get_evpn_overlay(pi->attr),
6c924775 DS	213	sizeof(evpn));
b54892e0	214	int32_t ret = bgp_update(peer, p,
4e802e66 DS	215	pi->addpath_rx_id,
	216	pi->attr, AFI_L2VPN, SAFI_EVPN,
	217	ZEBRA_ROUTE_BGP,
	218	BGP_ROUTE_NORMAL, &prd,
	219	label_pnt, num_labels,
6c924775	220	1, evpn);
4e802e66 DS	221
4e802e66 DS	222	if (ret < 0)
9bcb3eef	223	bgp_dest_unlock_node(dest);
4e802e66 DS	224	}
	225	}
	226	}
	227
78869ebf	228	static void bgp_mac_rescan_evpn_table(struct bgp bgp, struct ethaddr macaddr)
6a69ac51 DS	229	{
6a69ac51 DS	230	struct listnode *node;
4e802e66 DS	231	struct peer *peer;
	232	safi_t safi;
	233	afi_t afi;
	234
	235	afi = AFI_L2VPN;
	236	safi = SAFI_EVPN;
	237	for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) {
	238
	239	if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
	240	continue;
	241
feb17238	242	if (!peer_established(peer))
4e802e66 DS	243	continue;
4e802e66 DS	244
89c73443 DS	245	if (bgp_debug_update(peer, NULL, NULL, 1))
	246	zlog_debug(
	247	"Processing EVPN MAC interface change on peer %s %s",
	248	peer->host,
	249	CHECK_FLAG(peer->af_flags[afi][safi],
	250	PEER_FLAG_SOFT_RECONFIG)
	251	? "(inbound, soft-reconfig)"
	252	: "");
	253
	254	if (!bgp_soft_reconfig_in(peer, afi, safi)) {
4e802e66 DS	255	struct bgp_table *table = bgp->rib[afi][safi];
4e802e66 DS	256
78869ebf	257	bgp_process_mac_rescan_table(bgp, peer, table, macaddr);
4e802e66 DS	258	}
	259	}
	260	}
	261
78869ebf	262	static void bgp_mac_rescan_all_evpn_tables(struct ethaddr *macaddr)
4e802e66 DS	263	{
	264	struct listnode *node;
	265	struct bgp *bgp;
	266
	267	for (ALL_LIST_ELEMENTS_RO(bm->bgp, node, bgp)) {
	268	struct bgp_table *table = bgp->rib[AFI_L2VPN][SAFI_EVPN];
	269
	270	if (table)
78869ebf	271	bgp_mac_rescan_evpn_table(bgp, macaddr);
4e802e66 DS	272	}
	273	}
	274
78869ebf DS	275	static void bgp_mac_remove_ifp_internal(struct bgp_self_mac bsm, char ifname,
78869ebf DS	276	struct ethaddr *macaddr)
4e802e66 DS	277	{
4e802e66 DS	278	struct listnode *node = NULL;
6a69ac51 DS	279	char *name;
	280
	281	for (ALL_LIST_ELEMENTS_RO(bsm->ifp_list, node, name)) {
	282	if (strcmp(name, ifname) == 0)
	283	break;
	284	}
	285
	286	if (node) {
	287	list_delete_node(bsm->ifp_list, node);
	288	XFREE(MTYPE_BSM_STRING, name);
	289	}
	290
	291	if (bsm->ifp_list->count == 0) {
c86e8d64 DS	292	struct ethaddr mac = *macaddr;
c86e8d64 DS	293
6a69ac51 DS	294	hash_release(bm->self_mac_hash, bsm);
	295	list_delete(&bsm->ifp_list);
	296	XFREE(MTYPE_BSM, bsm);
	297
c86e8d64	298	bgp_mac_rescan_all_evpn_tables(&mac);
6a69ac51 DS	299	}
	300	}
	301
	302	void bgp_mac_add_mac_entry(struct interface *ifp)
	303	{
	304	struct bgp_self_mac lookup;
	305	struct bgp_self_mac *bsm;
	306	struct bgp_self_mac *old_bsm;
	307	char *ifname;
	308
	309	memcpy(&lookup.macaddr, &ifp->hw_addr, ETH_ALEN);
	310	bsm = hash_get(bm->self_mac_hash, &lookup, bgp_mac_hash_alloc);
	311
	312	/*
	313	* Does this happen to be a move
	314	*/
	315	old_bsm = bgp_mac_find_interface_name(ifp->name);
	316	ifname = XSTRDUP(MTYPE_BSM_STRING, ifp->name);
	317
	318	if (bsm->ifp_list->count == 0) {
	319
	320	listnode_add(bsm->ifp_list, ifname);
	321	if (old_bsm)
78869ebf DS	322	bgp_mac_remove_ifp_internal(old_bsm, ifname,
78869ebf DS	323	&old_bsm->macaddr);
6a69ac51 DS	324	} else {
	325	/*
	326	* If old mac address is the same as the new,
	327	* then there is nothing to do here
	328	*/
308000ee DS	329	if (old_bsm == bsm) {
308000ee DS	330	XFREE(MTYPE_BSM_STRING, ifname);
6a69ac51	331	return;
308000ee	332	}
6a69ac51 DS	333
6a69ac51 DS	334	if (old_bsm)
78869ebf DS	335	bgp_mac_remove_ifp_internal(old_bsm, ifp->name,
78869ebf DS	336	&old_bsm->macaddr);
6a69ac51 DS	337
	338	listnode_add(bsm->ifp_list, ifname);
	339	}
	340
78869ebf	341	bgp_mac_rescan_all_evpn_tables(&bsm->macaddr);
6a69ac51 DS	342	}
	343
	344	void bgp_mac_del_mac_entry(struct interface *ifp)
	345	{
	346	struct bgp_self_mac lookup;
	347	struct bgp_self_mac *bsm;
	348
	349	memcpy(&lookup.macaddr, &ifp->hw_addr, ETH_ALEN);
	350	bsm = hash_lookup(bm->self_mac_hash, &lookup);
	351	if (!bsm)
	352	return;
	353
	354	/*
	355	* Write code to allow old mac address to no-longer
	356	* win if we happen to have received it from a peer.
	357	*/
78869ebf	358	bgp_mac_remove_ifp_internal(bsm, ifp->name, &bsm->macaddr);
6a69ac51 DS	359	}
6a69ac51 DS	360
eee353c5 CS	361	/* This API checks MAC address against any of local
	362	* assigned (SVIs) MAC address.
	363	* An example: router-mac attribute in any of evpn update
	364	* requires to compare against local mac.
	365	*/
5a1ae2c2	366	bool bgp_mac_exist(const struct ethaddr *mac)
4e802e66	367	{
4e802e66 DS	368	struct bgp_self_mac lookup;
4e802e66 DS	369	struct bgp_self_mac *bsm;
eee353c5 CS	370	static uint8_t tmp [ETHER_ADDR_STRLEN] = {0};
	371
	372	if (memcmp(mac, &tmp, ETH_ALEN) == 0)
	373	return false;
	374
	375	memcpy(&lookup.macaddr, mac, ETH_ALEN);
	376	bsm = hash_lookup(bm->self_mac_hash, &lookup);
	377	if (!bsm)
	378	return false;
	379
	380	return true;
	381	}
	382
	383	/* This API checks EVPN type-2 prefix and comapares
	384	* mac against any of local assigned (SVIs) MAC
	385	* address.
	386	*/
5a1ae2c2	387	bool bgp_mac_entry_exists(const struct prefix *p)
eee353c5	388	{
5a1ae2c2	389	const struct prefix_evpn pevpn = (const struct prefix_evpn )p;
4e802e66 DS	390
	391	if (pevpn->family != AF_EVPN)
	392	return false;
	393
	394	if (pevpn->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE)
	395	return false;
	396
eee353c5	397	return bgp_mac_exist(&p->u.prefix_evpn.macip_addr.mac);
4e802e66 DS	398
	399	return true;
	400	}
	401
e3b78da8	402	static void bgp_mac_show_mac_entry(struct hash_bucket bucket, void arg)
48ecf8f5 DS	403	{
48ecf8f5 DS	404	struct vty *vty = arg;
e3b78da8	405	struct bgp_self_mac *bsm = bucket->data;
48ecf8f5 DS	406	struct listnode *node;
	407	char *name;
	408	char buf_mac[ETHER_ADDR_STRLEN];
	409
	410	vty_out(vty, "Mac Address: %s ",
	411	prefix_mac2str(&bsm->macaddr, buf_mac, sizeof(buf_mac)));
	412
	413	for (ALL_LIST_ELEMENTS_RO(bsm->ifp_list, node, name))
	414	vty_out(vty, "%s ", name);
	415
	416	vty_out(vty, "\n");
	417	}
	418
	419	void bgp_mac_dump_table(struct vty *vty)
	420	{
	421	hash_iterate(bm->self_mac_hash, bgp_mac_show_mac_entry, vty);
	422	}