1 /* Ethernet-VPN Packet and vty Processing File
2 * Copyright (C) 2016 6WIND
3 * Copyright (C) 2017 Cumulus Networks, Inc.
5 * This file is part of FRR.
7 * FRRouting is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2, or (at your option) any
12 * FRRouting is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; see the file COPYING; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
35 #include "bgpd/bgp_attr_evpn.h"
36 #include "bgpd/bgpd.h"
37 #include "bgpd/bgp_table.h"
38 #include "bgpd/bgp_route.h"
39 #include "bgpd/bgp_attr.h"
40 #include "bgpd/bgp_mplsvpn.h"
41 #include "bgpd/bgp_label.h"
42 #include "bgpd/bgp_evpn.h"
43 #include "bgpd/bgp_evpn_private.h"
44 #include "bgpd/bgp_ecommunity.h"
45 #include "bgpd/bgp_encap_types.h"
46 #include "bgpd/bgp_debug.h"
47 #include "bgpd/bgp_aspath.h"
48 #include "bgpd/bgp_zebra.h"
49 #include "bgpd/bgp_nexthop.h"
52 * Definitions and external declarations.
54 extern struct zclient
*zclient
;
56 DEFINE_QOBJ_TYPE(bgpevpn
)
60 * Static function declarations
62 static void delete_evpn_route_entry(struct bgp
*bgp
, struct bgpevpn
*vpn
,
63 afi_t afi
, safi_t safi
, struct bgp_node
*rn
,
64 struct bgp_info
**ri
);
65 static int delete_all_vni_routes(struct bgp
*bgp
, struct bgpevpn
*vpn
);
74 static unsigned int vni_hash_key_make(void *p
)
76 struct bgpevpn
*vpn
= p
;
77 return (jhash_1word(vpn
->vni
, 0));
81 * Comparison function for vni hash
83 static int vni_hash_cmp(const void *p1
, const void *p2
)
85 const struct bgpevpn
*vpn1
= p1
;
86 const struct bgpevpn
*vpn2
= p2
;
92 return (vpn1
->vni
== vpn2
->vni
);
96 * Make vrf import route target hash key.
98 static unsigned int vrf_import_rt_hash_key_make(void *p
)
100 struct vrf_irt_node
*irt
= p
;
101 char *pnt
= irt
->rt
.val
;
102 unsigned int key
= 0;
118 * Comparison function for vrf import rt hash
120 static int vrf_import_rt_hash_cmp(const void *p1
, const void *p2
)
122 const struct vrf_irt_node
*irt1
= p1
;
123 const struct vrf_irt_node
*irt2
= p2
;
125 if (irt1
== NULL
&& irt2
== NULL
)
128 if (irt1
== NULL
|| irt2
== NULL
)
131 return (memcmp(irt1
->rt
.val
, irt2
->rt
.val
, ECOMMUNITY_SIZE
) == 0);
135 * Create a new vrf import_rt in default instance
137 static struct vrf_irt_node
*vrf_import_rt_new(struct ecommunity_val
*rt
)
139 struct bgp
*bgp_def
= NULL
;
140 struct vrf_irt_node
*irt
;
142 bgp_def
= bgp_get_default();
144 zlog_err("vrf import rt new - def instance not created yet");
148 irt
= XCALLOC(MTYPE_BGP_EVPN_VRF_IMPORT_RT
,
149 sizeof(struct vrf_irt_node
));
154 irt
->vrfs
= list_new();
157 if (!hash_get(bgp_def
->vrf_import_rt_hash
, irt
, hash_alloc_intern
)) {
158 XFREE(MTYPE_BGP_EVPN_VRF_IMPORT_RT
, irt
);
166 * Free the vrf import rt node
168 static void vrf_import_rt_free(struct vrf_irt_node
*irt
)
170 struct bgp
*bgp_def
= NULL
;
172 bgp_def
= bgp_get_default();
174 zlog_err("vrf import rt free - def instance not created yet");
178 hash_release(bgp_def
->vrf_import_rt_hash
, irt
);
179 XFREE(MTYPE_BGP_EVPN_VRF_IMPORT_RT
, irt
);
183 * Function to lookup Import RT node - used to map a RT to set of
184 * VNIs importing routes with that RT.
186 static struct vrf_irt_node
*lookup_vrf_import_rt(struct ecommunity_val
*rt
)
188 struct bgp
*bgp_def
= NULL
;
189 struct vrf_irt_node
*irt
;
190 struct vrf_irt_node tmp
;
192 bgp_def
= bgp_get_default();
194 zlog_err("vrf import rt lookup - def instance not created yet");
198 memset(&tmp
, 0, sizeof(struct vrf_irt_node
));
199 memcpy(&tmp
.rt
, rt
, ECOMMUNITY_SIZE
);
200 irt
= hash_lookup(bgp_def
->vrf_import_rt_hash
, &tmp
);
205 * Is specified VRF present on the RT's list of "importing" VRFs?
207 static int is_vrf_present_in_irt_vrfs(struct list
*vrfs
,
210 struct listnode
*node
= NULL
, *nnode
= NULL
;
211 struct bgp
*tmp_bgp_vrf
= NULL
;
213 for (ALL_LIST_ELEMENTS(vrfs
, node
, nnode
, tmp_bgp_vrf
)) {
214 if (tmp_bgp_vrf
== bgp_vrf
)
221 * Make import route target hash key.
223 static unsigned int import_rt_hash_key_make(void *p
)
225 struct irt_node
*irt
= p
;
226 char *pnt
= irt
->rt
.val
;
227 unsigned int key
= 0;
243 * Comparison function for import rt hash
245 static int import_rt_hash_cmp(const void *p1
, const void *p2
)
247 const struct irt_node
*irt1
= p1
;
248 const struct irt_node
*irt2
= p2
;
250 if (irt1
== NULL
&& irt2
== NULL
)
253 if (irt1
== NULL
|| irt2
== NULL
)
256 return (memcmp(irt1
->rt
.val
, irt2
->rt
.val
, ECOMMUNITY_SIZE
) == 0);
260 * Create a new import_rt
262 static struct irt_node
*import_rt_new(struct bgp
*bgp
,
263 struct ecommunity_val
*rt
)
265 struct irt_node
*irt
;
270 irt
= XCALLOC(MTYPE_BGP_EVPN_IMPORT_RT
, sizeof(struct irt_node
));
275 irt
->vnis
= list_new();
278 if (!hash_get(bgp
->import_rt_hash
, irt
, hash_alloc_intern
)) {
279 XFREE(MTYPE_BGP_EVPN_IMPORT_RT
, irt
);
287 * Free the import rt node
289 static void import_rt_free(struct bgp
*bgp
, struct irt_node
*irt
)
291 hash_release(bgp
->import_rt_hash
, irt
);
292 XFREE(MTYPE_BGP_EVPN_IMPORT_RT
, irt
);
296 * Function to lookup Import RT node - used to map a RT to set of
297 * VNIs importing routes with that RT.
299 static struct irt_node
*lookup_import_rt(struct bgp
*bgp
,
300 struct ecommunity_val
*rt
)
302 struct irt_node
*irt
;
305 memset(&tmp
, 0, sizeof(struct irt_node
));
306 memcpy(&tmp
.rt
, rt
, ECOMMUNITY_SIZE
);
307 irt
= hash_lookup(bgp
->import_rt_hash
, &tmp
);
312 * Is specified VNI present on the RT's list of "importing" VNIs?
314 static int is_vni_present_in_irt_vnis(struct list
*vnis
, struct bgpevpn
*vpn
)
316 struct listnode
*node
, *nnode
;
317 struct bgpevpn
*tmp_vpn
;
319 for (ALL_LIST_ELEMENTS(vnis
, node
, nnode
, tmp_vpn
)) {
328 * Compare Route Targets.
330 static int evpn_route_target_cmp(struct ecommunity
*ecom1
,
331 struct ecommunity
*ecom2
)
339 if (!ecom1
&& !ecom2
)
342 if (ecom1
->str
&& !ecom2
->str
)
345 if (!ecom1
->str
&& ecom2
->str
)
348 if (!ecom1
->str
&& !ecom2
->str
)
351 return strcmp(ecom1
->str
, ecom2
->str
);
355 * Mask off global-admin field of specified extended community (RT),
356 * just retain the local-admin field.
358 static inline void mask_ecom_global_admin(struct ecommunity_val
*dst
,
359 struct ecommunity_val
*src
)
365 if (type
== ECOMMUNITY_ENCODE_AS
) {
366 dst
->val
[2] = dst
->val
[3] = 0;
367 } else if (type
== ECOMMUNITY_ENCODE_AS4
368 || type
== ECOMMUNITY_ENCODE_IP
) {
369 dst
->val
[2] = dst
->val
[3] = 0;
370 dst
->val
[4] = dst
->val
[5] = 0;
375 * Map one RT to specified VRF.
376 * bgp_vrf = BGP vrf instance
378 static void map_vrf_to_rt(struct bgp
*bgp_vrf
,
379 struct ecommunity_val
*eval
)
381 struct vrf_irt_node
*irt
= NULL
;
382 struct ecommunity_val eval_tmp
;
384 /* If using "automatic" RT,
385 * we only care about the local-admin sub-field.
386 * This is to facilitate using L3VNI(VRF-VNI)
387 * as the RT for EBGP peering too.
389 memcpy(&eval_tmp
, eval
, ECOMMUNITY_SIZE
);
390 if (!CHECK_FLAG(bgp_vrf
->vrf_flags
,
391 BGP_VRF_IMPORT_RT_CFGD
))
392 mask_ecom_global_admin(&eval_tmp
, eval
);
394 irt
= lookup_vrf_import_rt(&eval_tmp
);
395 if (irt
&& irt
->vrfs
)
396 if (is_vrf_present_in_irt_vrfs(irt
->vrfs
, bgp_vrf
))
397 /* Already mapped. */
401 irt
= vrf_import_rt_new(&eval_tmp
);
405 /* Add VRF to the list for this RT. */
406 listnode_add(irt
->vrfs
, bgp_vrf
);
410 * Unmap specified VRF from specified RT. If there are no other
411 * VRFs for this RT, then the RT hash is deleted.
412 * bgp_vrf: BGP VRF specific instance
414 static void unmap_vrf_from_rt(struct bgp
*bgp_vrf
,
415 struct vrf_irt_node
*irt
)
417 /* Delete VRF from list for this RT. */
418 listnode_delete(irt
->vrfs
, bgp_vrf
);
419 if (!listnode_head(irt
->vrfs
)) {
420 list_delete_and_null(&irt
->vrfs
);
421 vrf_import_rt_free(irt
);
426 * Map one RT to specified VNI.
428 static void map_vni_to_rt(struct bgp
*bgp
, struct bgpevpn
*vpn
,
429 struct ecommunity_val
*eval
)
431 struct irt_node
*irt
;
432 struct ecommunity_val eval_tmp
;
434 /* If using "automatic" RT, we only care about the local-admin
436 * This is to facilitate using VNI as the RT for EBGP peering too.
438 memcpy(&eval_tmp
, eval
, ECOMMUNITY_SIZE
);
439 if (!is_import_rt_configured(vpn
))
440 mask_ecom_global_admin(&eval_tmp
, eval
);
442 irt
= lookup_import_rt(bgp
, &eval_tmp
);
443 if (irt
&& irt
->vnis
)
444 if (is_vni_present_in_irt_vnis(irt
->vnis
, vpn
))
445 /* Already mapped. */
449 irt
= import_rt_new(bgp
, &eval_tmp
);
453 /* Add VNI to the hash list for this RT. */
454 listnode_add(irt
->vnis
, vpn
);
458 * Unmap specified VNI from specified RT. If there are no other
459 * VNIs for this RT, then the RT hash is deleted.
461 static void unmap_vni_from_rt(struct bgp
*bgp
, struct bgpevpn
*vpn
,
462 struct irt_node
*irt
)
464 /* Delete VNI from hash list for this RT. */
465 listnode_delete(irt
->vnis
, vpn
);
466 if (!listnode_head(irt
->vnis
)) {
467 list_delete_and_null(&irt
->vnis
);
468 import_rt_free(bgp
, irt
);
473 * Create RT extended community automatically from passed information:
474 * of the form AS:VNI.
475 * NOTE: We use only the lower 16 bits of the AS. This is sufficient as
476 * the need is to get a RT value that will be unique across different
477 * VNIs but the same across routers (in the same AS) for a particular
480 static void form_auto_rt(struct bgp
*bgp
, vni_t vni
, struct list
*rtl
)
482 struct ecommunity_val eval
;
483 struct ecommunity
*ecomadd
;
485 encode_route_target_as((bgp
->as
& 0xFFFF), vni
, &eval
);
487 ecomadd
= ecommunity_new();
488 ecommunity_add_val(ecomadd
, &eval
);
489 listnode_add_sort(rtl
, ecomadd
);
493 * Derive RD and RT for a VNI automatically. Invoked at the time of
496 static void derive_rd_rt_for_vni(struct bgp
*bgp
, struct bgpevpn
*vpn
)
498 bgp_evpn_derive_auto_rd(bgp
, vpn
);
499 bgp_evpn_derive_auto_rt_import(bgp
, vpn
);
500 bgp_evpn_derive_auto_rt_export(bgp
, vpn
);
504 * Add (update) or delete MACIP from zebra.
506 static int bgp_zebra_send_remote_macip(struct bgp
*bgp
, struct bgpevpn
*vpn
,
507 struct prefix_evpn
*p
,
508 struct in_addr remote_vtep_ip
, int add
,
513 char buf1
[ETHER_ADDR_STRLEN
];
514 char buf2
[INET6_ADDRSTRLEN
];
515 char buf3
[INET6_ADDRSTRLEN
];
518 if (!zclient
|| zclient
->sock
< 0)
521 /* Don't try to register if Zebra doesn't know of this instance. */
522 if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bgp
))
528 zclient_create_header(s
, add
? ZEBRA_REMOTE_MACIP_ADD
529 : ZEBRA_REMOTE_MACIP_DEL
,
531 stream_putl(s
, vpn
->vni
);
532 stream_put(s
, &p
->prefix
.mac
.octet
, ETH_ALEN
); /* Mac Addr */
533 /* IP address length and IP address, if any. */
534 if (IS_EVPN_PREFIX_IPADDR_NONE(p
))
537 ipa_len
= IS_EVPN_PREFIX_IPADDR_V4(p
) ? IPV4_MAX_BYTELEN
539 stream_putl(s
, ipa_len
);
540 stream_put(s
, &p
->prefix
.ip
.ip
.addr
, ipa_len
);
542 stream_put_in_addr(s
, &remote_vtep_ip
);
544 /* TX MAC sticky status */
546 stream_putc(s
, sticky
);
548 stream_putw_at(s
, 0, stream_get_endp(s
));
550 if (bgp_debug_zebra(NULL
))
551 zlog_debug("Tx %s MACIP, VNI %u %sMAC %s IP %s remote VTEP %s",
552 add
? "ADD" : "DEL", vpn
->vni
,
553 sticky
? "sticky " : "",
554 prefix_mac2str(&p
->prefix
.mac
, buf1
, sizeof(buf1
)),
555 ipaddr2str(&p
->prefix
.ip
, buf3
, sizeof(buf3
)),
556 inet_ntop(AF_INET
, &remote_vtep_ip
, buf2
,
559 return zclient_send_message(zclient
);
563 * Add (update) or delete remote VTEP from zebra.
565 static int bgp_zebra_send_remote_vtep(struct bgp
*bgp
, struct bgpevpn
*vpn
,
566 struct prefix_evpn
*p
, int add
)
571 if (!zclient
|| zclient
->sock
< 0)
574 /* Don't try to register if Zebra doesn't know of this instance. */
575 if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bgp
))
581 zclient_create_header(s
, add
? ZEBRA_REMOTE_VTEP_ADD
582 : ZEBRA_REMOTE_VTEP_DEL
,
584 stream_putl(s
, vpn
->vni
);
585 if (IS_EVPN_PREFIX_IPADDR_V4(p
))
586 stream_put_in_addr(s
, &p
->prefix
.ip
.ipaddr_v4
);
587 else if (IS_EVPN_PREFIX_IPADDR_V6(p
)) {
589 "Bad remote IP when trying to %s remote VTEP for VNI %u",
590 add
? "ADD" : "DEL", vpn
->vni
);
594 stream_putw_at(s
, 0, stream_get_endp(s
));
596 if (bgp_debug_zebra(NULL
))
597 zlog_debug("Tx %s Remote VTEP, VNI %u remote VTEP %s",
598 add
? "ADD" : "DEL", vpn
->vni
,
599 inet_ntoa(p
->prefix
.ip
.ipaddr_v4
));
601 return zclient_send_message(zclient
);
605 * Build extended communities for EVPN prefix route.
607 static void build_evpn_type5_route_extcomm(struct bgp
*bgp_vrf
,
610 struct ecommunity ecom_encap
;
611 struct ecommunity ecom_rmac
;
612 struct ecommunity_val eval
;
613 struct ecommunity_val eval_rmac
;
614 bgp_encap_types tnl_type
;
615 struct listnode
*node
, *nnode
;
616 struct ecommunity
*ecom
;
617 struct list
*vrf_export_rtl
= NULL
;
620 tnl_type
= BGP_ENCAP_TYPE_VXLAN
;
621 memset(&ecom_encap
, 0, sizeof(ecom_encap
));
622 encode_encap_extcomm(tnl_type
, &eval
);
624 ecom_encap
.val
= (u_int8_t
*)eval
.val
;
627 attr
->ecommunity
= ecommunity_dup(&ecom_encap
);
629 /* Add the export RTs for L3VNI/VRF */
630 vrf_export_rtl
= bgp_vrf
->vrf_export_rtl
;
631 if (vrf_export_rtl
&& !list_isempty(vrf_export_rtl
)) {
632 for (ALL_LIST_ELEMENTS(vrf_export_rtl
, node
, nnode
, ecom
))
633 attr
->ecommunity
= ecommunity_merge(attr
->ecommunity
,
637 /* add the router mac extended community */
638 if (!is_zero_mac(&attr
->rmac
)) {
639 memset(&ecom_rmac
, 0, sizeof(ecom_rmac
));
640 encode_rmac_extcomm(&eval_rmac
, &attr
->rmac
);
642 ecom_rmac
.val
= (uint8_t *)eval_rmac
.val
;
643 attr
->ecommunity
= ecommunity_merge(attr
->ecommunity
,
647 attr
->flag
|= ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES
);
651 * Build extended communities for EVPN route. RT and ENCAP are
652 * applicable to all routes.
653 * TODO: currently kernel doesnt support ipv6 routes with ipv4 nexthops.
654 * This means that we can't do symmetric routing for ipv6 hosts routes
655 * in the same way as ipv4 host routes.
656 * We wont attach l3-vni related RTs for ipv6 routes.
657 * For now, We will only adevrtise ipv4 host routes
658 * with L3-VNI related ext-comm.
660 static void build_evpn_route_extcomm(struct bgpevpn
*vpn
, struct attr
*attr
,
663 struct ecommunity ecom_encap
;
664 struct ecommunity ecom_sticky
;
665 struct ecommunity ecom_rmac
;
666 struct ecommunity_val eval
;
667 struct ecommunity_val eval_sticky
;
668 struct ecommunity_val eval_rmac
;
669 bgp_encap_types tnl_type
;
670 struct listnode
*node
, *nnode
;
671 struct ecommunity
*ecom
;
673 struct list
*vrf_export_rtl
= NULL
;
676 tnl_type
= BGP_ENCAP_TYPE_VXLAN
;
677 memset(&ecom_encap
, 0, sizeof(ecom_encap
));
678 encode_encap_extcomm(tnl_type
, &eval
);
680 ecom_encap
.val
= (u_int8_t
*)eval
.val
;
683 attr
->ecommunity
= ecommunity_dup(&ecom_encap
);
685 /* Add the export RTs for L2VNI */
686 for (ALL_LIST_ELEMENTS(vpn
->export_rtl
, node
, nnode
, ecom
))
687 attr
->ecommunity
= ecommunity_merge(attr
->ecommunity
, ecom
);
689 /* Add the export RTs for L3VNI - currently only supported for IPV4 host
692 vrf_export_rtl
= bgpevpn_get_vrf_export_rtl(vpn
);
693 if (vrf_export_rtl
&& !list_isempty(vrf_export_rtl
)) {
694 for (ALL_LIST_ELEMENTS(vrf_export_rtl
, node
, nnode
,
697 ecommunity_merge(attr
->ecommunity
,
704 memset(&ecom_sticky
, 0, sizeof(ecom_sticky
));
705 encode_mac_mobility_extcomm(1, seqnum
, &eval_sticky
);
706 ecom_sticky
.size
= 1;
707 ecom_sticky
.val
= (u_int8_t
*)eval_sticky
.val
;
709 ecommunity_merge(attr
->ecommunity
, &ecom_sticky
);
712 if (afi
== AFI_IP
&& !is_zero_mac(&attr
->rmac
)) {
713 memset(&ecom_rmac
, 0, sizeof(ecom_rmac
));
714 encode_rmac_extcomm(&eval_rmac
, &attr
->rmac
);
716 ecom_rmac
.val
= (uint8_t *)eval_rmac
.val
;
717 attr
->ecommunity
= ecommunity_merge(attr
->ecommunity
,
721 attr
->flag
|= ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES
);
725 * Add MAC mobility extended community to attribute.
727 static void add_mac_mobility_to_attr(u_int32_t seq_num
, struct attr
*attr
)
729 struct ecommunity ecom_tmp
;
730 struct ecommunity_val eval
;
731 u_int8_t
*ecom_val_ptr
;
738 encode_mac_mobility_extcomm(0, seq_num
, &eval
);
740 /* Find current MM ecommunity */
743 if (attr
->ecommunity
) {
744 for (i
= 0; i
< attr
->ecommunity
->size
; i
++) {
745 pnt
= attr
->ecommunity
->val
+ (i
* 8);
749 if (type
== ECOMMUNITY_ENCODE_EVPN
751 == ECOMMUNITY_EVPN_SUBTYPE_MACMOBILITY
) {
753 (u_int8_t
*)(attr
->ecommunity
->val
760 /* Update the existing MM ecommunity */
762 memcpy(ecom_val_ptr
, eval
.val
, sizeof(char) * ECOMMUNITY_SIZE
);
764 /* Add MM to existing */
766 memset(&ecom_tmp
, 0, sizeof(ecom_tmp
));
768 ecom_tmp
.val
= (u_int8_t
*)eval
.val
;
771 ecommunity_merge(attr
->ecommunity
, &ecom_tmp
);
775 /* Install EVPN route into zebra. */
776 static int evpn_zebra_install(struct bgp
*bgp
, struct bgpevpn
*vpn
,
777 struct prefix_evpn
*p
,
778 struct in_addr remote_vtep_ip
, u_char sticky
)
782 if (p
->prefix
.route_type
== BGP_EVPN_MAC_IP_ROUTE
)
783 ret
= bgp_zebra_send_remote_macip(bgp
, vpn
, p
, remote_vtep_ip
,
786 ret
= bgp_zebra_send_remote_vtep(bgp
, vpn
, p
, 1);
791 /* Uninstall EVPN route from zebra. */
792 static int evpn_zebra_uninstall(struct bgp
*bgp
, struct bgpevpn
*vpn
,
793 struct prefix_evpn
*p
,
794 struct in_addr remote_vtep_ip
)
798 if (p
->prefix
.route_type
== BGP_EVPN_MAC_IP_ROUTE
)
799 ret
= bgp_zebra_send_remote_macip(bgp
, vpn
, p
, remote_vtep_ip
,
802 ret
= bgp_zebra_send_remote_vtep(bgp
, vpn
, p
, 0);
808 * Due to MAC mobility, the prior "local" best route has been supplanted
809 * by a "remote" best route. The prior route has to be deleted and withdrawn
812 static void evpn_delete_old_local_route(struct bgp
*bgp
, struct bgpevpn
*vpn
,
814 struct bgp_info
*old_local
)
816 struct bgp_node
*global_rn
;
818 afi_t afi
= AFI_L2VPN
;
819 safi_t safi
= SAFI_EVPN
;
821 /* Locate route node in the global EVPN routing table. Note that
822 * this table is a 2-level tree (RD-level + Prefix-level) similar to
825 global_rn
= bgp_afi_node_lookup(bgp
->rib
[afi
][safi
], afi
, safi
,
826 (struct prefix
*)&rn
->p
, &vpn
->prd
);
828 /* Delete route entry in the global EVPN table. */
829 delete_evpn_route_entry(bgp
, vpn
, afi
, safi
, global_rn
, &ri
);
831 /* Schedule for processing - withdraws to peers happen from
835 bgp_process(bgp
, global_rn
, afi
, safi
);
836 bgp_unlock_node(global_rn
);
839 /* Delete route entry in the VNI route table, caller to remove. */
840 bgp_info_delete(rn
, old_local
);
844 * Calculate the best path for an EVPN route. Install/update best path in zebra,
847 static int evpn_route_select_install(struct bgp
*bgp
, struct bgpevpn
*vpn
,
850 struct bgp_info
*old_select
, *new_select
;
851 struct bgp_info_pair old_and_new
;
852 afi_t afi
= AFI_L2VPN
;
853 safi_t safi
= SAFI_EVPN
;
856 /* Compute the best path. */
857 bgp_best_selection(bgp
, rn
, &bgp
->maxpaths
[afi
][safi
], &old_and_new
,
859 old_select
= old_and_new
.old
;
860 new_select
= old_and_new
.new;
862 /* If the best path hasn't changed - see if there is still something to
866 if (old_select
&& old_select
== new_select
867 && old_select
->type
== ZEBRA_ROUTE_BGP
868 && old_select
->sub_type
== BGP_ROUTE_NORMAL
869 && !CHECK_FLAG(rn
->flags
, BGP_NODE_USER_CLEAR
)
870 && !CHECK_FLAG(old_select
->flags
, BGP_INFO_ATTR_CHANGED
)
871 && !bgp
->addpath_tx_used
[afi
][safi
]) {
872 if (bgp_zebra_has_route_changed(rn
, old_select
))
873 ret
= evpn_zebra_install(bgp
, vpn
,
874 (struct prefix_evpn
*)&rn
->p
,
875 old_select
->attr
->nexthop
,
876 old_select
->attr
->sticky
);
877 UNSET_FLAG(old_select
->flags
, BGP_INFO_MULTIPATH_CHG
);
878 bgp_zebra_clear_route_change_flags(rn
);
882 /* If the user did a "clear" this flag will be set */
883 UNSET_FLAG(rn
->flags
, BGP_NODE_USER_CLEAR
);
885 /* bestpath has changed; update relevant fields and install or uninstall
886 * into the zebra RIB.
888 if (old_select
|| new_select
)
889 bgp_bump_version(rn
);
892 bgp_info_unset_flag(rn
, old_select
, BGP_INFO_SELECTED
);
894 bgp_info_set_flag(rn
, new_select
, BGP_INFO_SELECTED
);
895 bgp_info_unset_flag(rn
, new_select
, BGP_INFO_ATTR_CHANGED
);
896 UNSET_FLAG(new_select
->flags
, BGP_INFO_MULTIPATH_CHG
);
899 if (new_select
&& new_select
->type
== ZEBRA_ROUTE_BGP
900 && new_select
->sub_type
== BGP_ROUTE_NORMAL
) {
901 ret
= evpn_zebra_install(bgp
, vpn
, (struct prefix_evpn
*)&rn
->p
,
902 new_select
->attr
->nexthop
,
903 new_select
->attr
->sticky
);
904 /* If an old best existed and it was a "local" route, the only
906 * it would be supplanted is due to MAC mobility procedures. So,
908 * need to do an implicit delete and withdraw that route from
911 if (old_select
&& old_select
->peer
== bgp
->peer_self
912 && old_select
->type
== ZEBRA_ROUTE_BGP
913 && old_select
->sub_type
== BGP_ROUTE_STATIC
)
914 evpn_delete_old_local_route(bgp
, vpn
, rn
, old_select
);
916 if (old_select
&& old_select
->type
== ZEBRA_ROUTE_BGP
917 && old_select
->sub_type
== BGP_ROUTE_NORMAL
)
918 ret
= evpn_zebra_uninstall(bgp
, vpn
,
919 (struct prefix_evpn
*)&rn
->p
,
920 old_select
->attr
->nexthop
);
923 /* Clear any route change flags. */
924 bgp_zebra_clear_route_change_flags(rn
);
926 /* Reap old select bgp_info, if it has been removed */
927 if (old_select
&& CHECK_FLAG(old_select
->flags
, BGP_INFO_REMOVED
))
928 bgp_info_reap(rn
, old_select
);
935 * Return true if the local ri for this rn has sticky set
937 static int evpn_route_is_sticky(struct bgp
*bgp
, struct bgp_node
*rn
)
939 struct bgp_info
*tmp_ri
;
940 struct bgp_info
*local_ri
;
943 for (tmp_ri
= rn
->info
; tmp_ri
; tmp_ri
= tmp_ri
->next
) {
944 if (tmp_ri
->peer
== bgp
->peer_self
945 && tmp_ri
->type
== ZEBRA_ROUTE_BGP
946 && tmp_ri
->sub_type
== BGP_ROUTE_STATIC
)
953 return local_ri
->attr
->sticky
;
956 static int update_evpn_type5_route_entry(struct bgp
*bgp_def
,
957 struct bgp
*bgp_vrf
, afi_t afi
,
958 safi_t safi
, struct bgp_node
*rn
,
961 struct attr
*attr_new
= NULL
;
962 struct bgp_info
*ri
= NULL
;
963 mpls_label_t label
= MPLS_INVALID_LABEL
;
964 struct bgp_info
*local_ri
= NULL
;
965 struct bgp_info
*tmp_ri
= NULL
;
968 /* locate the local route entry if any */
969 for (tmp_ri
= rn
->info
; tmp_ri
; tmp_ri
= tmp_ri
->next
) {
970 if (tmp_ri
->peer
== bgp_def
->peer_self
971 && tmp_ri
->type
== ZEBRA_ROUTE_BGP
972 && tmp_ri
->sub_type
== BGP_ROUTE_STATIC
)
976 /* create a new route entry if one doesnt exist.
977 Otherwise see if route attr has changed */
980 /* Add (or update) attribute to hash. */
981 attr_new
= bgp_attr_intern(attr
);
983 /* create the route info from attribute */
984 ri
= info_make(ZEBRA_ROUTE_BGP
, BGP_ROUTE_STATIC
, 0,
985 bgp_def
->peer_self
, attr_new
, rn
);
986 SET_FLAG(ri
->flags
, BGP_INFO_VALID
);
988 /* L3-VNI goes in the label2 field */
989 bgp_info_extra_get(ri
);
990 vni2label(bgp_vrf
->l3vni
, &label
);
991 memcpy(&ri
->extra
->label2
, &label
, BGP_LABEL_BYTES
);
993 /* add the route entry to route node*/
994 bgp_info_add(rn
, ri
);
998 if (!attrhash_cmp(tmp_ri
->attr
, attr
)) {
999 /* The attribute has changed. */
1000 /* Add (or update) attribute to hash. */
1001 attr_new
= bgp_attr_intern(attr
);
1002 bgp_info_set_flag(rn
, tmp_ri
, BGP_INFO_ATTR_CHANGED
);
1004 /* Restore route, if needed. */
1005 if (CHECK_FLAG(tmp_ri
->flags
, BGP_INFO_REMOVED
))
1006 bgp_info_restore(rn
, tmp_ri
);
1008 /* Unintern existing, set to new. */
1009 bgp_attr_unintern(&tmp_ri
->attr
);
1010 tmp_ri
->attr
= attr_new
;
1011 tmp_ri
->uptime
= bgp_clock();
1017 /* update evpn type-5 route entry */
1018 static int update_evpn_type5_route(struct bgp
*bgp_vrf
,
1019 struct prefix_evpn
*evp
)
1021 afi_t afi
= AFI_L2VPN
;
1022 safi_t safi
= SAFI_EVPN
;
1024 struct bgp_node
*rn
= NULL
;
1025 struct bgp
*bgp_def
= NULL
;
1027 bgp_def
= bgp_get_default();
1031 /* build path attribute for this route */
1032 memset(&attr
, 0, sizeof(struct attr
));
1033 bgp_attr_default_set(&attr
, BGP_ORIGIN_IGP
);
1034 attr
.nexthop
= bgp_vrf
->originator_ip
;
1035 attr
.mp_nexthop_global_in
= bgp_vrf
->originator_ip
;
1036 attr
.mp_nexthop_len
= BGP_ATTR_NHLEN_IPV4
;
1037 memcpy(&attr
.rmac
, &bgp_vrf
->rmac
, sizeof(struct ethaddr
));
1039 /* Setup RT and encap extended community */
1040 build_evpn_type5_route_extcomm(bgp_vrf
, &attr
);
1042 /* get the route node in global table */
1043 rn
= bgp_afi_node_get(bgp_def
->rib
[afi
][safi
], afi
, safi
,
1044 (struct prefix
*)evp
,
1048 /* create or update the route entry within the route node */
1049 update_evpn_type5_route_entry(bgp_def
, bgp_vrf
,
1053 /* schedule for processing and unlock node */
1054 bgp_process(bgp_def
, rn
, afi
, safi
);
1055 bgp_unlock_node(rn
);
1057 /* uninten temporary */
1058 aspath_unintern(&attr
.aspath
);
1063 * Create or update EVPN route entry. This could be in the VNI route table
1064 * or the global route table.
1066 static int update_evpn_route_entry(struct bgp
*bgp
, struct bgpevpn
*vpn
,
1067 afi_t afi
, safi_t safi
, struct bgp_node
*rn
,
1068 struct attr
*attr
, int add
, int vni_table
,
1069 struct bgp_info
**ri
, u_char flags
)
1071 struct bgp_info
*tmp_ri
;
1072 struct bgp_info
*local_ri
, *remote_ri
;
1073 struct attr
*attr_new
;
1074 mpls_label_t label
= MPLS_INVALID_LABEL
;
1075 int route_change
= 1;
1080 /* See if this is an update of an existing route, or a new add. Also,
1081 * identify if already known from remote, and if so, the one with the
1082 * highest sequence number; this is only when adding to the VNI routing
1085 local_ri
= remote_ri
= NULL
;
1086 for (tmp_ri
= rn
->info
; tmp_ri
; tmp_ri
= tmp_ri
->next
) {
1087 if (tmp_ri
->peer
== bgp
->peer_self
1088 && tmp_ri
->type
== ZEBRA_ROUTE_BGP
1089 && tmp_ri
->sub_type
== BGP_ROUTE_STATIC
)
1092 if (tmp_ri
->type
== ZEBRA_ROUTE_BGP
1093 && tmp_ri
->sub_type
== BGP_ROUTE_NORMAL
1094 && CHECK_FLAG(tmp_ri
->flags
, BGP_INFO_VALID
)) {
1097 else if (mac_mobility_seqnum(tmp_ri
->attr
)
1098 > mac_mobility_seqnum(remote_ri
->attr
))
1104 /* If route doesn't exist already, create a new one, if told to.
1105 * Otherwise act based on whether the attributes of the route have
1108 if (!local_ri
&& !add
)
1112 /* When learnt locally for the first time but already known from
1113 * remote, we have to initiate appropriate MAC mobility steps.
1115 * is applicable when updating the VNI routing table.
1116 * We need to skip mobility steps for g/w macs (local mac on g/w
1117 * SVI) advertised in EVPN.
1118 * This will ensure that local routes are preferred for g/w macs
1120 if (remote_ri
&& !CHECK_FLAG(flags
, ZEBRA_MAC_TYPE_GW
)) {
1121 u_int32_t cur_seqnum
;
1123 /* Add MM extended community to route. */
1124 cur_seqnum
= mac_mobility_seqnum(remote_ri
->attr
);
1125 add_mac_mobility_to_attr(cur_seqnum
+ 1, attr
);
1128 /* Add (or update) attribute to hash. */
1129 attr_new
= bgp_attr_intern(attr
);
1131 /* Extract MAC mobility sequence number, if any. */
1132 attr_new
->mm_seqnum
=
1133 bgp_attr_mac_mobility_seqnum(attr_new
, &sticky
);
1134 attr_new
->sticky
= sticky
;
1136 /* Create new route with its attribute. */
1137 tmp_ri
= info_make(ZEBRA_ROUTE_BGP
, BGP_ROUTE_STATIC
, 0,
1138 bgp
->peer_self
, attr_new
, rn
);
1139 SET_FLAG(tmp_ri
->flags
, BGP_INFO_VALID
);
1140 bgp_info_extra_get(tmp_ri
);
1142 /* The VNI goes into the 'label' field of the route */
1143 vni2label(vpn
->vni
, &label
);
1145 memcpy(&tmp_ri
->extra
->label
, &label
, BGP_LABEL_BYTES
);
1146 bgp_info_add(rn
, tmp_ri
);
1149 if (attrhash_cmp(tmp_ri
->attr
, attr
)
1150 && !CHECK_FLAG(tmp_ri
->flags
, BGP_INFO_REMOVED
))
1153 /* The attribute has changed. */
1154 /* Add (or update) attribute to hash. */
1155 attr_new
= bgp_attr_intern(attr
);
1156 bgp_info_set_flag(rn
, tmp_ri
, BGP_INFO_ATTR_CHANGED
);
1158 /* Restore route, if needed. */
1159 if (CHECK_FLAG(tmp_ri
->flags
, BGP_INFO_REMOVED
))
1160 bgp_info_restore(rn
, tmp_ri
);
1162 /* Unintern existing, set to new. */
1163 bgp_attr_unintern(&tmp_ri
->attr
);
1164 tmp_ri
->attr
= attr_new
;
1165 tmp_ri
->uptime
= bgp_clock();
1169 /* Return back the route entry. */
1171 return route_change
;
1175 * Create or update EVPN route (of type based on prefix) for specified VNI
1176 * and schedule for processing.
1178 static int update_evpn_route(struct bgp
*bgp
, struct bgpevpn
*vpn
,
1179 struct prefix_evpn
*p
, u_char flags
)
1181 struct bgp_node
*rn
;
1183 struct attr
*attr_new
;
1184 struct bgp_info
*ri
;
1185 afi_t afi
= AFI_L2VPN
;
1186 safi_t safi
= SAFI_EVPN
;
1189 memset(&attr
, 0, sizeof(struct attr
));
1191 /* Build path-attribute for this route. */
1192 bgp_attr_default_set(&attr
, BGP_ORIGIN_IGP
);
1193 attr
.nexthop
= vpn
->originator_ip
;
1194 attr
.mp_nexthop_global_in
= vpn
->originator_ip
;
1195 attr
.mp_nexthop_len
= BGP_ATTR_NHLEN_IPV4
;
1196 attr
.sticky
= CHECK_FLAG(flags
, ZEBRA_MAC_TYPE_STICKY
) ? 1 : 0;
1197 bgpevpn_get_rmac(vpn
, &attr
.rmac
);
1199 /* Set up RT and ENCAP extended community. */
1200 build_evpn_route_extcomm(vpn
, &attr
,
1201 IS_EVPN_PREFIX_IPADDR_V4(p
) ?
1204 /* First, create (or fetch) route node within the VNI. */
1205 /* NOTE: There is no RD here. */
1206 rn
= bgp_node_get(vpn
->route_table
, (struct prefix
*)p
);
1208 /* Create or update route entry. */
1209 route_change
= update_evpn_route_entry(bgp
, vpn
, afi
, safi
, rn
, &attr
,
1212 attr_new
= ri
->attr
;
1214 /* Perform route selection; this is just to set the flags correctly
1215 * as local route in the VNI always wins.
1217 evpn_route_select_install(bgp
, vpn
, rn
);
1218 bgp_unlock_node(rn
);
1220 /* If this is a new route or some attribute has changed, export the
1221 * route to the global table. The route will be advertised to peers
1222 * from there. Note that this table is a 2-level tree (RD-level +
1223 * Prefix-level) similar to L3VPN routes.
1226 struct bgp_info
*global_ri
;
1228 rn
= bgp_afi_node_get(bgp
->rib
[afi
][safi
], afi
, safi
,
1229 (struct prefix
*)p
, &vpn
->prd
);
1230 update_evpn_route_entry(bgp
, vpn
, afi
, safi
, rn
, attr_new
, 1, 0,
1233 /* Schedule for processing and unlock node. */
1234 bgp_process(bgp
, rn
, afi
, safi
);
1235 bgp_unlock_node(rn
);
1238 /* Unintern temporary. */
1239 aspath_unintern(&attr
.aspath
);
1244 /* Delete EVPN type5 route entry from global table */
1245 static void delete_evpn_type5_route_entry(struct bgp
*bgp_def
,
1246 struct bgp
*bgp_vrf
,
1247 afi_t afi
, safi_t safi
,
1248 struct bgp_node
*rn
,
1249 struct bgp_info
**ri
)
1251 struct bgp_info
*tmp_ri
= NULL
;
1255 /* find the matching route entry */
1256 for (tmp_ri
= rn
->info
; tmp_ri
; tmp_ri
= tmp_ri
->next
)
1257 if (tmp_ri
->peer
== bgp_def
->peer_self
1258 && tmp_ri
->type
== ZEBRA_ROUTE_BGP
1259 && tmp_ri
->sub_type
== BGP_ROUTE_STATIC
)
1264 /* Mark route for delete. */
1266 bgp_info_delete(rn
, tmp_ri
);
1269 /* Delete EVPN type5 route */
1270 static int delete_evpn_type5_route(struct bgp
*bgp_vrf
,
1271 struct prefix_evpn
*evp
)
1273 afi_t afi
= AFI_L2VPN
;
1274 safi_t safi
= SAFI_EVPN
;
1275 struct bgp_node
*rn
= NULL
;
1276 struct bgp_info
*ri
= NULL
;
1277 struct bgp
*bgp_def
= NULL
; /* default bgp instance */
1279 bgp_def
= bgp_get_default();
1283 /* locate the global route entry for this type-5 prefix */
1284 rn
= bgp_afi_node_lookup(bgp_def
->rib
[afi
][safi
], afi
, safi
,
1285 (struct prefix
*)evp
, &bgp_vrf
->vrf_prd
);
1289 delete_evpn_type5_route_entry(bgp_def
, bgp_vrf
, afi
, safi
, rn
, &ri
);
1291 bgp_process(bgp_def
, rn
, afi
, safi
);
1292 bgp_unlock_node(rn
);
1297 * Delete EVPN route entry. This could be in the VNI route table
1298 * or the global route table.
1300 static void delete_evpn_route_entry(struct bgp
*bgp
, struct bgpevpn
*vpn
,
1301 afi_t afi
, safi_t safi
, struct bgp_node
*rn
,
1302 struct bgp_info
**ri
)
1304 struct bgp_info
*tmp_ri
;
1308 /* Now, find matching route. */
1309 for (tmp_ri
= rn
->info
; tmp_ri
; tmp_ri
= tmp_ri
->next
)
1310 if (tmp_ri
->peer
== bgp
->peer_self
1311 && tmp_ri
->type
== ZEBRA_ROUTE_BGP
1312 && tmp_ri
->sub_type
== BGP_ROUTE_STATIC
)
1317 /* Mark route for delete. */
1319 bgp_info_delete(rn
, tmp_ri
);
1323 * Delete EVPN route (of type based on prefix) for specified VNI and
1324 * schedule for processing.
1326 static int delete_evpn_route(struct bgp
*bgp
, struct bgpevpn
*vpn
,
1327 struct prefix_evpn
*p
)
1329 struct bgp_node
*rn
, *global_rn
;
1330 struct bgp_info
*ri
;
1331 afi_t afi
= AFI_L2VPN
;
1332 safi_t safi
= SAFI_EVPN
;
1334 /* First, locate the route node within the VNI. If it doesn't exist,
1336 * is nothing further to do.
1338 /* NOTE: There is no RD here. */
1339 rn
= bgp_node_lookup(vpn
->route_table
, (struct prefix
*)p
);
1343 /* Next, locate route node in the global EVPN routing table. Note that
1344 * this table is a 2-level tree (RD-level + Prefix-level) similar to
1347 global_rn
= bgp_afi_node_lookup(bgp
->rib
[afi
][safi
], afi
, safi
,
1348 (struct prefix
*)p
, &vpn
->prd
);
1350 /* Delete route entry in the global EVPN table. */
1351 delete_evpn_route_entry(bgp
, vpn
, afi
, safi
, global_rn
, &ri
);
1353 /* Schedule for processing - withdraws to peers happen from
1357 bgp_process(bgp
, global_rn
, afi
, safi
);
1358 bgp_unlock_node(global_rn
);
1361 /* Delete route entry in the VNI route table. This can just be removed.
1363 delete_evpn_route_entry(bgp
, vpn
, afi
, safi
, rn
, &ri
);
1365 bgp_info_reap(rn
, ri
);
1366 bgp_unlock_node(rn
);
1372 * Update all type-2 (MACIP) local routes for this VNI - these should also
1373 * be scheduled for advertise to peers.
1375 static int update_all_type2_routes(struct bgp
*bgp
, struct bgpevpn
*vpn
)
1379 struct bgp_node
*rn
;
1380 struct bgp_info
*ri
;
1382 struct attr attr_sticky
;
1383 struct attr attr_ip6
;
1384 struct attr attr_sticky_ip6
;
1385 struct attr
*attr_new
;
1389 memset(&attr
, 0, sizeof(struct attr
));
1390 memset(&attr_sticky
, 0, sizeof(struct attr
));
1391 memset(&attr_ip6
, 0, sizeof(struct attr
));
1392 memset(&attr_sticky_ip6
, 0, sizeof(struct attr
));
1394 /* Build path-attribute - all type-2 routes for this VNI will share the
1395 * same path attribute.
1397 bgp_attr_default_set(&attr
, BGP_ORIGIN_IGP
);
1398 bgp_attr_default_set(&attr_sticky
, BGP_ORIGIN_IGP
);
1399 attr
.nexthop
= vpn
->originator_ip
;
1400 attr
.mp_nexthop_global_in
= vpn
->originator_ip
;
1401 attr
.mp_nexthop_len
= BGP_ATTR_NHLEN_IPV4
;
1402 bgpevpn_get_rmac(vpn
, &attr
.rmac
);
1403 attr_sticky
.nexthop
= vpn
->originator_ip
;
1404 attr_sticky
.mp_nexthop_global_in
= vpn
->originator_ip
;
1405 attr_sticky
.mp_nexthop_len
= BGP_ATTR_NHLEN_IPV4
;
1406 attr_sticky
.sticky
= 1;
1407 bgpevpn_get_rmac(vpn
, &attr_sticky
.rmac
);
1408 bgp_attr_default_set(&attr_ip6
, BGP_ORIGIN_IGP
);
1409 bgp_attr_default_set(&attr_sticky_ip6
, BGP_ORIGIN_IGP
);
1410 attr_ip6
.nexthop
= vpn
->originator_ip
;
1411 attr_ip6
.mp_nexthop_global_in
= vpn
->originator_ip
;
1412 attr_ip6
.mp_nexthop_len
= BGP_ATTR_NHLEN_IPV4
;
1413 bgpevpn_get_rmac(vpn
, &attr_ip6
.rmac
);
1414 attr_sticky_ip6
.nexthop
= vpn
->originator_ip
;
1415 attr_sticky_ip6
.mp_nexthop_global_in
= vpn
->originator_ip
;
1416 attr_sticky_ip6
.mp_nexthop_len
= BGP_ATTR_NHLEN_IPV4
;
1417 attr_sticky_ip6
.sticky
= 1;
1418 bgpevpn_get_rmac(vpn
, &attr_sticky_ip6
.rmac
);
1420 /* Set up RT, ENCAP and sticky MAC extended community. */
1421 build_evpn_route_extcomm(vpn
, &attr
, AFI_IP
);
1422 build_evpn_route_extcomm(vpn
, &attr_sticky
, AFI_IP
);
1423 build_evpn_route_extcomm(vpn
, &attr_ip6
, AFI_IP6
);
1424 build_evpn_route_extcomm(vpn
, &attr_sticky_ip6
, AFI_IP6
);
1426 /* Walk this VNI's route table and update local type-2 routes. For any
1427 * routes updated, update corresponding entry in the global table too.
1429 for (rn
= bgp_table_top(vpn
->route_table
); rn
;
1430 rn
= bgp_route_next(rn
)) {
1431 struct prefix_evpn
*evp
= (struct prefix_evpn
*)&rn
->p
;
1432 struct bgp_node
*rd_rn
;
1433 struct bgp_info
*global_ri
;
1435 if (evp
->prefix
.route_type
!= BGP_EVPN_MAC_IP_ROUTE
)
1438 if (IS_EVPN_PREFIX_IPADDR_V4(evp
)) {
1439 if (evpn_route_is_sticky(bgp
, rn
))
1440 update_evpn_route_entry(bgp
, vpn
, afi
, safi
, rn
,
1444 update_evpn_route_entry(bgp
, vpn
, afi
, safi
, rn
,
1445 &attr
, 0, 1, &ri
, 0);
1447 if (evpn_route_is_sticky(bgp
, rn
))
1448 update_evpn_route_entry(bgp
, vpn
, afi
, safi
, rn
,
1449 &attr_sticky_ip6
, 0, 1,
1452 update_evpn_route_entry(bgp
, vpn
, afi
, safi
, rn
,
1457 /* If a local route exists for this prefix, we need to update
1458 * the global routing table too.
1463 /* Perform route selection; this is just to set the flags
1465 * as local route in the VNI always wins.
1467 evpn_route_select_install(bgp
, vpn
, rn
);
1469 attr_new
= ri
->attr
;
1471 /* Update route in global routing table. */
1472 rd_rn
= bgp_afi_node_get(bgp
->rib
[afi
][safi
], afi
, safi
,
1473 (struct prefix
*)evp
, &vpn
->prd
);
1475 update_evpn_route_entry(bgp
, vpn
, afi
, safi
, rd_rn
, attr_new
, 0,
1478 /* Schedule for processing and unlock node. */
1479 bgp_process(bgp
, rd_rn
, afi
, safi
);
1480 bgp_unlock_node(rd_rn
);
1483 /* Unintern temporary. */
1484 aspath_unintern(&attr
.aspath
);
1485 aspath_unintern(&attr_sticky
.aspath
);
1491 * Delete all type-2 (MACIP) local routes for this VNI - only from the
1492 * global routing table. These are also scheduled for withdraw from peers.
1494 static int delete_global_type2_routes(struct bgp
*bgp
, struct bgpevpn
*vpn
)
1498 struct bgp_node
*rdrn
, *rn
;
1499 struct bgp_table
*table
;
1500 struct bgp_info
*ri
;
1505 rdrn
= bgp_node_lookup(bgp
->rib
[afi
][safi
], (struct prefix
*)&vpn
->prd
);
1506 if (rdrn
&& rdrn
->info
) {
1507 table
= (struct bgp_table
*)rdrn
->info
;
1508 for (rn
= bgp_table_top(table
); rn
; rn
= bgp_route_next(rn
)) {
1509 struct prefix_evpn
*evp
= (struct prefix_evpn
*)&rn
->p
;
1511 if (evp
->prefix
.route_type
!= BGP_EVPN_MAC_IP_ROUTE
)
1514 delete_evpn_route_entry(bgp
, vpn
, afi
, safi
, rn
, &ri
);
1516 bgp_process(bgp
, rn
, afi
, safi
);
1520 /* Unlock RD node. */
1522 bgp_unlock_node(rdrn
);
1528 * Delete all type-2 (MACIP) local routes for this VNI - from the global
1529 * table as well as the per-VNI route table.
1531 static int delete_all_type2_routes(struct bgp
*bgp
, struct bgpevpn
*vpn
)
1535 struct bgp_node
*rn
;
1536 struct bgp_info
*ri
;
1541 /* First, walk the global route table for this VNI's type-2 local
1543 * EVPN routes are a 2-level table, first get the RD table.
1545 delete_global_type2_routes(bgp
, vpn
);
1547 /* Next, walk this VNI's route table and delete local type-2 routes. */
1548 for (rn
= bgp_table_top(vpn
->route_table
); rn
;
1549 rn
= bgp_route_next(rn
)) {
1550 struct prefix_evpn
*evp
= (struct prefix_evpn
*)&rn
->p
;
1552 if (evp
->prefix
.route_type
!= BGP_EVPN_MAC_IP_ROUTE
)
1555 delete_evpn_route_entry(bgp
, vpn
, afi
, safi
, rn
, &ri
);
1557 /* Route entry in local table gets deleted immediately. */
1559 bgp_info_reap(rn
, ri
);
1566 * Delete all routes in the per-VNI route table.
1568 static int delete_all_vni_routes(struct bgp
*bgp
, struct bgpevpn
*vpn
)
1570 struct bgp_node
*rn
;
1571 struct bgp_info
*ri
, *nextri
;
1573 /* Walk this VNI's route table and delete all routes. */
1574 for (rn
= bgp_table_top(vpn
->route_table
); rn
;
1575 rn
= bgp_route_next(rn
)) {
1576 for (ri
= rn
->info
; (ri
!= NULL
) && (nextri
= ri
->next
, 1);
1578 bgp_info_delete(rn
, ri
);
1579 bgp_info_reap(rn
, ri
);
1587 * Update (and advertise) local routes for a VNI. Invoked upon the VNI
1588 * export RT getting modified or change to tunnel IP. Note that these
1589 * situations need the route in the per-VNI table as well as the global
1590 * table to be updated (as attributes change).
1592 static int update_routes_for_vni(struct bgp
*bgp
, struct bgpevpn
*vpn
)
1595 struct prefix_evpn p
;
1597 /* Update and advertise the type-3 route (only one) followed by the
1598 * locally learnt type-2 routes (MACIP) - for this VNI.
1600 build_evpn_type3_prefix(&p
, vpn
->originator_ip
);
1601 ret
= update_evpn_route(bgp
, vpn
, &p
, 0);
1605 return update_all_type2_routes(bgp
, vpn
);
1609 * Delete (and withdraw) local routes for specified VNI from the global
1610 * table and per-VNI table. After this, remove all other routes from
1611 * the per-VNI table. Invoked upon the VNI being deleted or EVPN
1612 * (advertise-all-vni) being disabled.
1614 static int delete_routes_for_vni(struct bgp
*bgp
, struct bgpevpn
*vpn
)
1617 struct prefix_evpn p
;
1619 /* Delete and withdraw locally learnt type-2 routes (MACIP)
1620 * followed by type-3 routes (only one) - for this VNI.
1622 ret
= delete_all_type2_routes(bgp
, vpn
);
1626 build_evpn_type3_prefix(&p
, vpn
->originator_ip
);
1627 ret
= delete_evpn_route(bgp
, vpn
, &p
);
1631 /* Delete all routes from the per-VNI table. */
1632 return delete_all_vni_routes(bgp
, vpn
);
1636 * There is a tunnel endpoint IP address change for this VNI,
1637 * need to re-advertise routes with the new nexthop.
1639 static int handle_tunnel_ip_change(struct bgp
*bgp
, struct bgpevpn
*vpn
,
1640 struct in_addr originator_ip
)
1642 struct prefix_evpn p
;
1644 /* If VNI is not live, we only need to update the originator ip */
1645 if (!is_vni_live(vpn
)) {
1646 vpn
->originator_ip
= originator_ip
;
1650 /* Update the tunnel-ip hash */
1651 bgp_tip_del(bgp
, &vpn
->originator_ip
);
1652 bgp_tip_add(bgp
, &originator_ip
);
1654 /* filter routes as martian nexthop db has changed */
1655 bgp_filter_evpn_routes_upon_martian_nh_change(bgp
);
1657 /* Need to withdraw type-3 route as the originator IP is part
1660 build_evpn_type3_prefix(&p
, vpn
->originator_ip
);
1661 delete_evpn_route(bgp
, vpn
, &p
);
1663 /* Update the tunnel IP and re-advertise all routes for this VNI. */
1664 vpn
->originator_ip
= originator_ip
;
1665 return update_routes_for_vni(bgp
, vpn
);
1669 * Install route entry into the VRF routing table and invoke route selection.
1671 static int install_evpn_route_entry_in_vrf(struct bgp
*bgp_vrf
,
1672 struct prefix_evpn
*evp
,
1673 struct bgp_info
*parent_ri
)
1675 struct bgp_node
*rn
;
1676 struct bgp_info
*ri
;
1677 struct attr
*attr_new
;
1680 struct prefix
*pp
= &p
;
1683 char buf
[PREFIX_STRLEN
];
1684 char buf1
[PREFIX_STRLEN
];
1686 memset(pp
, 0, sizeof(struct prefix
));
1687 ip_prefix_from_type2_prefix(evp
, pp
);
1689 if (bgp_debug_zebra(NULL
)) {
1690 zlog_debug("installing evpn prefix %s as ip prefix %s in vrf %s",
1691 prefix2str(evp
, buf
, sizeof(buf
)),
1692 prefix2str(pp
, buf1
, sizeof(buf
)),
1693 vrf_id_to_name(bgp_vrf
->vrf_id
));
1696 /* Create (or fetch) route within the VRF. */
1697 /* NOTE: There is no RD here. */
1698 if (IS_EVPN_PREFIX_IPADDR_V4(evp
)) {
1700 safi
= SAFI_UNICAST
;
1701 rn
= bgp_node_get(bgp_vrf
->rib
[afi
][safi
], pp
);
1702 } else if (IS_EVPN_PREFIX_IPADDR_V6(evp
)) {
1704 safi
= SAFI_UNICAST
;
1705 rn
= bgp_node_get(bgp_vrf
->rib
[afi
][safi
], pp
);
1709 /* Check if route entry is already present. */
1710 for (ri
= rn
->info
; ri
; ri
= ri
->next
)
1712 && (struct bgp_info
*)ri
->extra
->parent
== parent_ri
)
1716 /* Add (or update) attribute to hash. */
1717 attr_new
= bgp_attr_intern(parent_ri
->attr
);
1719 /* Create new route with its attribute. */
1720 ri
= info_make(parent_ri
->type
, parent_ri
->sub_type
, 0,
1721 parent_ri
->peer
, attr_new
, rn
);
1722 SET_FLAG(ri
->flags
, BGP_INFO_VALID
);
1723 bgp_info_extra_get(ri
);
1724 ri
->extra
->parent
= parent_ri
;
1725 if (parent_ri
->extra
)
1726 memcpy(&ri
->extra
->label
, &parent_ri
->extra
->label
,
1728 bgp_info_add(rn
, ri
);
1730 if (attrhash_cmp(ri
->attr
, parent_ri
->attr
)
1731 && !CHECK_FLAG(ri
->flags
, BGP_INFO_REMOVED
)) {
1732 bgp_unlock_node(rn
);
1735 /* The attribute has changed. */
1736 /* Add (or update) attribute to hash. */
1737 attr_new
= bgp_attr_intern(parent_ri
->attr
);
1739 /* Restore route, if needed. */
1740 if (CHECK_FLAG(ri
->flags
, BGP_INFO_REMOVED
))
1741 bgp_info_restore(rn
, ri
);
1743 /* Mark if nexthop has changed. */
1744 if (!IPV4_ADDR_SAME(&ri
->attr
->nexthop
, &attr_new
->nexthop
))
1745 SET_FLAG(ri
->flags
, BGP_INFO_IGP_CHANGED
);
1747 /* Unintern existing, set to new. */
1748 bgp_attr_unintern(&ri
->attr
);
1749 ri
->attr
= attr_new
;
1750 ri
->uptime
= bgp_clock();
1753 /* Perform route selection and update zebra, if required. */
1754 bgp_process(bgp_vrf
, rn
, afi
, safi
);
1760 * Install route entry into the VNI routing table and invoke route selection.
1762 static int install_evpn_route_entry(struct bgp
*bgp
, struct bgpevpn
*vpn
,
1763 struct prefix_evpn
*p
,
1764 struct bgp_info
*parent_ri
)
1766 struct bgp_node
*rn
;
1767 struct bgp_info
*ri
;
1768 struct attr
*attr_new
;
1771 /* Create (or fetch) route within the VNI. */
1772 /* NOTE: There is no RD here. */
1773 rn
= bgp_node_get(vpn
->route_table
, (struct prefix
*)p
);
1775 /* Check if route entry is already present. */
1776 for (ri
= rn
->info
; ri
; ri
= ri
->next
)
1778 && (struct bgp_info
*)ri
->extra
->parent
== parent_ri
)
1782 /* Add (or update) attribute to hash. */
1783 attr_new
= bgp_attr_intern(parent_ri
->attr
);
1785 /* Create new route with its attribute. */
1786 ri
= info_make(parent_ri
->type
, parent_ri
->sub_type
, 0,
1787 parent_ri
->peer
, attr_new
, rn
);
1788 SET_FLAG(ri
->flags
, BGP_INFO_VALID
);
1789 bgp_info_extra_get(ri
);
1790 ri
->extra
->parent
= parent_ri
;
1791 if (parent_ri
->extra
)
1792 memcpy(&ri
->extra
->label
, &parent_ri
->extra
->label
,
1794 bgp_info_add(rn
, ri
);
1796 if (attrhash_cmp(ri
->attr
, parent_ri
->attr
)
1797 && !CHECK_FLAG(ri
->flags
, BGP_INFO_REMOVED
)) {
1798 bgp_unlock_node(rn
);
1801 /* The attribute has changed. */
1802 /* Add (or update) attribute to hash. */
1803 attr_new
= bgp_attr_intern(parent_ri
->attr
);
1805 /* Restore route, if needed. */
1806 if (CHECK_FLAG(ri
->flags
, BGP_INFO_REMOVED
))
1807 bgp_info_restore(rn
, ri
);
1809 /* Mark if nexthop has changed. */
1810 if (!IPV4_ADDR_SAME(&ri
->attr
->nexthop
, &attr_new
->nexthop
))
1811 SET_FLAG(ri
->flags
, BGP_INFO_IGP_CHANGED
);
1813 /* Unintern existing, set to new. */
1814 bgp_attr_unintern(&ri
->attr
);
1815 ri
->attr
= attr_new
;
1816 ri
->uptime
= bgp_clock();
1819 /* Perform route selection and update zebra, if required. */
1820 ret
= evpn_route_select_install(bgp
, vpn
, rn
);
1826 * Uninstall route entry from the VRF routing table and send message
1827 * to zebra, if appropriate.
1829 static int uninstall_evpn_route_entry_in_vrf(struct bgp
*bgp_vrf
,
1830 struct prefix_evpn
*evp
,
1831 struct bgp_info
*parent_ri
)
1833 struct bgp_node
*rn
;
1834 struct bgp_info
*ri
;
1837 struct prefix
*pp
= &p
;
1840 char buf
[PREFIX_STRLEN
];
1841 char buf1
[PREFIX_STRLEN
];
1843 memset(pp
, 0, sizeof(struct prefix
));
1844 ip_prefix_from_type2_prefix(evp
, pp
);
1846 if (bgp_debug_zebra(NULL
)) {
1847 zlog_debug("uninstalling evpn prefix %s as ip prefix %s in vrf %s",
1848 prefix2str(evp
, buf
, sizeof(buf
)),
1849 prefix2str(pp
, buf1
, sizeof(buf
)),
1850 vrf_id_to_name(bgp_vrf
->vrf_id
));
1853 /* Locate route within the VRF. */
1854 /* NOTE: There is no RD here. */
1855 if (IS_EVPN_PREFIX_IPADDR_V4(evp
)) {
1857 safi
= SAFI_UNICAST
;
1858 rn
= bgp_node_lookup(bgp_vrf
->rib
[afi
][safi
], pp
);
1861 safi
= SAFI_UNICAST
;
1862 rn
= bgp_node_lookup(bgp_vrf
->rib
[afi
][safi
], pp
);
1868 /* Find matching route entry. */
1869 for (ri
= rn
->info
; ri
; ri
= ri
->next
)
1871 && (struct bgp_info
*)ri
->extra
->parent
== parent_ri
)
1877 /* Mark entry for deletion */
1878 bgp_info_delete(rn
, ri
);
1880 /* Perform route selection and update zebra, if required. */
1881 bgp_process(bgp_vrf
, rn
, afi
, safi
);
1883 /* Unlock route node. */
1884 bgp_unlock_node(rn
);
1890 * Uninstall route entry from the VNI routing table and send message
1891 * to zebra, if appropriate.
1893 static int uninstall_evpn_route_entry(struct bgp
*bgp
, struct bgpevpn
*vpn
,
1894 struct prefix_evpn
*p
,
1895 struct bgp_info
*parent_ri
)
1897 struct bgp_node
*rn
;
1898 struct bgp_info
*ri
;
1901 /* Locate route within the VNI. */
1902 /* NOTE: There is no RD here. */
1903 rn
= bgp_node_lookup(vpn
->route_table
, (struct prefix
*)p
);
1907 /* Find matching route entry. */
1908 for (ri
= rn
->info
; ri
; ri
= ri
->next
)
1910 && (struct bgp_info
*)ri
->extra
->parent
== parent_ri
)
1916 /* Mark entry for deletion */
1917 bgp_info_delete(rn
, ri
);
1919 /* Perform route selection and update zebra, if required. */
1920 ret
= evpn_route_select_install(bgp
, vpn
, rn
);
1922 /* Unlock route node. */
1923 bgp_unlock_node(rn
);
1929 * Given a route entry and a VRF, see if this route entry should be
1930 * imported into the VRF i.e., RTs match.
1932 static int is_route_matching_for_vrf(struct bgp
*bgp_vrf
,
1933 struct bgp_info
*ri
)
1935 struct attr
*attr
= ri
->attr
;
1936 struct ecommunity
*ecom
;
1940 /* Route should have valid RT to be even considered. */
1941 if (!(attr
->flag
& ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES
)))
1944 ecom
= attr
->ecommunity
;
1945 if (!ecom
|| !ecom
->size
)
1948 /* For each extended community RT, see if it matches this VNI. If any RT
1949 * matches, we're done.
1951 for (i
= 0; i
< ecom
->size
; i
++) {
1953 u_char type
, sub_type
;
1954 struct ecommunity_val
*eval
;
1955 struct ecommunity_val eval_tmp
;
1956 struct vrf_irt_node
*irt
;
1958 /* Only deal with RTs */
1959 pnt
= (ecom
->val
+ (i
* ECOMMUNITY_SIZE
));
1960 eval
= (struct ecommunity_val
*)(ecom
->val
1961 + (i
* ECOMMUNITY_SIZE
));
1964 if (sub_type
!= ECOMMUNITY_ROUTE_TARGET
)
1967 /* See if this RT matches specified VNIs import RTs */
1968 irt
= lookup_vrf_import_rt(eval
);
1969 if (irt
&& irt
->vrfs
)
1970 if (is_vrf_present_in_irt_vrfs(irt
->vrfs
, bgp_vrf
))
1973 /* Also check for non-exact match. In this, we mask out the AS
1975 * only check on the local-admin sub-field. This is to
1977 * VNI as the RT for EBGP peering too.
1980 if (type
== ECOMMUNITY_ENCODE_AS
1981 || type
== ECOMMUNITY_ENCODE_AS4
1982 || type
== ECOMMUNITY_ENCODE_IP
) {
1983 memcpy(&eval_tmp
, eval
, ECOMMUNITY_SIZE
);
1984 mask_ecom_global_admin(&eval_tmp
, eval
);
1985 irt
= lookup_vrf_import_rt(&eval_tmp
);
1987 if (irt
&& irt
->vrfs
)
1988 if (is_vrf_present_in_irt_vrfs(irt
->vrfs
, bgp_vrf
))
1996 * Given a route entry and a VNI, see if this route entry should be
1997 * imported into the VNI i.e., RTs match.
1999 static int is_route_matching_for_vni(struct bgp
*bgp
, struct bgpevpn
*vpn
,
2000 struct bgp_info
*ri
)
2002 struct attr
*attr
= ri
->attr
;
2003 struct ecommunity
*ecom
;
2007 /* Route should have valid RT to be even considered. */
2008 if (!(attr
->flag
& ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES
)))
2011 ecom
= attr
->ecommunity
;
2012 if (!ecom
|| !ecom
->size
)
2015 /* For each extended community RT, see if it matches this VNI. If any RT
2016 * matches, we're done.
2018 for (i
= 0; i
< ecom
->size
; i
++) {
2020 u_char type
, sub_type
;
2021 struct ecommunity_val
*eval
;
2022 struct ecommunity_val eval_tmp
;
2023 struct irt_node
*irt
;
2025 /* Only deal with RTs */
2026 pnt
= (ecom
->val
+ (i
* ECOMMUNITY_SIZE
));
2027 eval
= (struct ecommunity_val
*)(ecom
->val
2028 + (i
* ECOMMUNITY_SIZE
));
2031 if (sub_type
!= ECOMMUNITY_ROUTE_TARGET
)
2034 /* See if this RT matches specified VNIs import RTs */
2035 irt
= lookup_import_rt(bgp
, eval
);
2036 if (irt
&& irt
->vnis
)
2037 if (is_vni_present_in_irt_vnis(irt
->vnis
, vpn
))
2040 /* Also check for non-exact match. In this, we mask out the AS
2042 * only check on the local-admin sub-field. This is to
2044 * VNI as the RT for EBGP peering too.
2047 if (type
== ECOMMUNITY_ENCODE_AS
2048 || type
== ECOMMUNITY_ENCODE_AS4
2049 || type
== ECOMMUNITY_ENCODE_IP
) {
2050 memcpy(&eval_tmp
, eval
, ECOMMUNITY_SIZE
);
2051 mask_ecom_global_admin(&eval_tmp
, eval
);
2052 irt
= lookup_import_rt(bgp
, &eval_tmp
);
2054 if (irt
&& irt
->vnis
)
2055 if (is_vni_present_in_irt_vnis(irt
->vnis
, vpn
))
2063 * Install or uninstall mac-ip routes are appropriate for this
2066 static int install_uninstall_routes_for_vrf(struct bgp
*bgp_vrf
,
2071 struct bgp_node
*rd_rn
, *rn
;
2072 struct bgp_table
*table
;
2073 struct bgp_info
*ri
;
2075 char buf
[PREFIX_STRLEN
];
2076 struct bgp
*bgp_def
= NULL
;
2080 bgp_def
= bgp_get_default();
2084 /* Walk entire global routing table and evaluate routes which could be
2085 * imported into this VRF. Note that we need to loop through all global
2086 * routes to determine which route matches the import rt on vrf
2088 for (rd_rn
= bgp_table_top(bgp_def
->rib
[afi
][safi
]); rd_rn
;
2089 rd_rn
= bgp_route_next(rd_rn
)) {
2090 table
= (struct bgp_table
*)(rd_rn
->info
);
2094 for (rn
= bgp_table_top(table
); rn
; rn
= bgp_route_next(rn
)) {
2095 struct prefix_evpn
*evp
= (struct prefix_evpn
*)&rn
->p
;
2097 /* if not mac-ip route skip this route */
2098 if (evp
->prefix
.route_type
!= BGP_EVPN_MAC_IP_ROUTE
)
2101 /* if not a mac+ip route skip this route */
2102 if (!(IS_EVPN_PREFIX_IPADDR_V4(evp
) ||
2103 IS_EVPN_PREFIX_IPADDR_V6(evp
)))
2106 for (ri
= rn
->info
; ri
; ri
= ri
->next
) {
2107 /* Consider "valid" remote routes applicable for
2109 if (!(CHECK_FLAG(ri
->flags
, BGP_INFO_VALID
)
2110 && ri
->type
== ZEBRA_ROUTE_BGP
2111 && ri
->sub_type
== BGP_ROUTE_NORMAL
))
2114 if (is_route_matching_for_vrf(bgp_vrf
, ri
)) {
2117 install_evpn_route_entry_in_vrf(
2121 uninstall_evpn_route_entry_in_vrf(
2126 "Failed to %s EVPN %s route in VRF %s",
2129 prefix2str(evp
, buf
,
2131 vrf_id_to_name(bgp_vrf
->vrf_id
));
2143 * Install or uninstall routes of specified type that are appropriate for this
2146 static int install_uninstall_routes_for_vni(struct bgp
*bgp
,
2147 struct bgpevpn
*vpn
,
2148 bgp_evpn_route_type rtype
,
2153 struct bgp_node
*rd_rn
, *rn
;
2154 struct bgp_table
*table
;
2155 struct bgp_info
*ri
;
2161 /* Walk entire global routing table and evaluate routes which could be
2162 * imported into this VPN. Note that we cannot just look at the routes
2164 * the VNI's RD - remote routes applicable for this VNI could have any
2167 /* EVPN routes are a 2-level table. */
2168 for (rd_rn
= bgp_table_top(bgp
->rib
[afi
][safi
]); rd_rn
;
2169 rd_rn
= bgp_route_next(rd_rn
)) {
2170 table
= (struct bgp_table
*)(rd_rn
->info
);
2174 for (rn
= bgp_table_top(table
); rn
; rn
= bgp_route_next(rn
)) {
2175 struct prefix_evpn
*evp
= (struct prefix_evpn
*)&rn
->p
;
2177 if (evp
->prefix
.route_type
!= rtype
)
2180 for (ri
= rn
->info
; ri
; ri
= ri
->next
) {
2181 /* Consider "valid" remote routes applicable for
2183 if (!(CHECK_FLAG(ri
->flags
, BGP_INFO_VALID
)
2184 && ri
->type
== ZEBRA_ROUTE_BGP
2185 && ri
->sub_type
== BGP_ROUTE_NORMAL
))
2188 if (is_route_matching_for_vni(bgp
, vpn
, ri
)) {
2190 ret
= install_evpn_route_entry(
2193 ret
= uninstall_evpn_route_entry(
2198 "%u: Failed to %s EVPN %s route in VNI %u",
2202 rtype
== BGP_EVPN_MAC_IP_ROUTE
2216 /* Install any existing remote routes applicable for this VRF into VRF RIB. This
2217 * is invoked upon l3vni-add or l3vni import rt change */
2218 static int install_routes_for_vrf(struct bgp
*bgp_vrf
)
2220 install_uninstall_routes_for_vrf(bgp_vrf
, 1);
2225 * Install any existing remote routes applicable for this VNI into its
2226 * routing table. This is invoked when a VNI becomes "live" or its Import
2229 static int install_routes_for_vni(struct bgp
*bgp
, struct bgpevpn
*vpn
)
2233 /* Install type-3 routes followed by type-2 routes - the ones applicable
2236 ret
= install_uninstall_routes_for_vni(bgp
, vpn
, BGP_EVPN_IMET_ROUTE
,
2241 return install_uninstall_routes_for_vni(bgp
, vpn
, BGP_EVPN_MAC_IP_ROUTE
,
2245 /* uninstall routes from l3vni vrf. */
2246 static int uninstall_routes_for_vrf(struct bgp
*bgp_vrf
)
2248 install_uninstall_routes_for_vrf(bgp_vrf
, 0);
2253 * Uninstall any existing remote routes for this VNI. One scenario in which
2254 * this is invoked is upon an import RT change.
2256 static int uninstall_routes_for_vni(struct bgp
*bgp
, struct bgpevpn
*vpn
)
2260 /* Uninstall type-2 routes followed by type-3 routes - the ones
2264 ret
= install_uninstall_routes_for_vni(bgp
, vpn
, BGP_EVPN_MAC_IP_ROUTE
,
2269 return install_uninstall_routes_for_vni(bgp
, vpn
, BGP_EVPN_IMET_ROUTE
,
2274 * Install or uninstall route in matching VRFs (list).
2276 static int install_uninstall_route_in_vrfs(struct bgp
*bgp_def
, afi_t afi
,
2277 safi_t safi
, struct prefix_evpn
*evp
,
2278 struct bgp_info
*ri
,
2279 struct list
*vrfs
, int install
)
2281 char buf
[PREFIX2STR_BUFFER
];
2282 struct bgp
*bgp_vrf
;
2283 struct listnode
*node
, *nnode
;
2285 /* Only type-2 routes go into a VRF */
2286 if (!(evp
->prefix
.route_type
== BGP_EVPN_MAC_IP_ROUTE
))
2289 /* if not a mac+ip route skip this route */
2290 if (!(IS_EVPN_PREFIX_IPADDR_V4(evp
) ||
2291 IS_EVPN_PREFIX_IPADDR_V6(evp
)))
2294 for (ALL_LIST_ELEMENTS(vrfs
, node
, nnode
, bgp_vrf
)) {
2298 ret
= install_evpn_route_entry_in_vrf(bgp_vrf
,
2301 ret
= uninstall_evpn_route_entry_in_vrf(bgp_vrf
,
2305 zlog_err("%u: Failed to %s prefix %s in VRF %s",
2307 install
? "install" : "uninstall",
2308 prefix2str(evp
, buf
, sizeof(buf
)),
2309 vrf_id_to_name(bgp_vrf
->vrf_id
));
2318 * Install or uninstall route in matching VNIs (list).
2320 static int install_uninstall_route_in_vnis(struct bgp
*bgp
, afi_t afi
,
2321 safi_t safi
, struct prefix_evpn
*evp
,
2322 struct bgp_info
*ri
,
2323 struct list
*vnis
, int install
)
2325 struct bgpevpn
*vpn
;
2326 struct listnode
*node
, *nnode
;
2328 for (ALL_LIST_ELEMENTS(vnis
, node
, nnode
, vpn
)) {
2331 if (!is_vni_live(vpn
))
2335 ret
= install_evpn_route_entry(bgp
, vpn
, evp
, ri
);
2337 ret
= uninstall_evpn_route_entry(bgp
, vpn
, evp
, ri
);
2340 zlog_err("%u: Failed to %s EVPN %s route in VNI %u",
2341 bgp
->vrf_id
, install
? "install" : "uninstall",
2342 evp
->prefix
.route_type
== BGP_EVPN_MAC_IP_ROUTE
2354 * Install or uninstall route for appropriate VNIs.
2356 static int install_uninstall_evpn_route(struct bgp
*bgp
, afi_t afi
, safi_t safi
,
2357 struct prefix
*p
, struct bgp_info
*ri
,
2360 struct prefix_evpn
*evp
= (struct prefix_evpn
*)p
;
2361 struct attr
*attr
= ri
->attr
;
2362 struct ecommunity
*ecom
;
2367 /* Only type-2 and type-3 routes go into a L2 VNI. */
2368 if (!(evp
->prefix
.route_type
== BGP_EVPN_MAC_IP_ROUTE
2369 || evp
->prefix
.route_type
== BGP_EVPN_IMET_ROUTE
))
2372 /* If we don't have Route Target, nothing much to do. */
2373 if (!(attr
->flag
& ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES
)))
2376 ecom
= attr
->ecommunity
;
2377 if (!ecom
|| !ecom
->size
)
2380 /* For each extended community RT, see which VNIs match and import
2381 * the route into matching VNIs.
2383 for (i
= 0; i
< ecom
->size
; i
++) {
2385 u_char type
, sub_type
;
2386 struct ecommunity_val
*eval
;
2387 struct ecommunity_val eval_tmp
;
2388 struct irt_node
*irt
; /* import rt for l2vni */
2389 struct vrf_irt_node
*vrf_irt
; /* import rt for l3vni */
2391 /* Only deal with RTs */
2392 pnt
= (ecom
->val
+ (i
* ECOMMUNITY_SIZE
));
2393 eval
= (struct ecommunity_val
*)(ecom
->val
2394 + (i
* ECOMMUNITY_SIZE
));
2397 if (sub_type
!= ECOMMUNITY_ROUTE_TARGET
)
2400 /* Import route into matching l2-vnis */
2401 irt
= lookup_import_rt(bgp
, eval
);
2402 if (irt
&& irt
->vnis
)
2403 install_uninstall_route_in_vnis(bgp
, afi
, safi
, evp
, ri
,
2406 /* Import route into matching l3-vnis (vrfs) */
2407 vrf_irt
= lookup_vrf_import_rt(eval
);
2408 if (vrf_irt
&& vrf_irt
->vrfs
)
2409 install_uninstall_route_in_vrfs(bgp
, afi
, safi
, evp
, ri
,
2410 vrf_irt
->vrfs
, import
);
2412 /* Also check for non-exact match. In this, we mask out the AS
2414 * only check on the local-admin sub-field. This is to
2416 * VNI as the RT for EBGP peering too.
2420 if (type
== ECOMMUNITY_ENCODE_AS
2421 || type
== ECOMMUNITY_ENCODE_AS4
2422 || type
== ECOMMUNITY_ENCODE_IP
) {
2423 memcpy(&eval_tmp
, eval
, ECOMMUNITY_SIZE
);
2424 mask_ecom_global_admin(&eval_tmp
, eval
);
2425 irt
= lookup_import_rt(bgp
, &eval_tmp
);
2426 vrf_irt
= lookup_vrf_import_rt(&eval_tmp
);
2428 if (irt
&& irt
->vnis
)
2429 install_uninstall_route_in_vnis(bgp
, afi
, safi
, evp
, ri
,
2431 if (vrf_irt
&& vrf_irt
->vrfs
)
2432 install_uninstall_route_in_vrfs(bgp
, afi
, safi
, evp
,
2440 /* delete and withdraw all ipv4 and ipv6 routes in the vrf table as type-5
2442 static void delete_withdraw_vrf_routes(struct bgp
*bgp_vrf
)
2444 /* delete all ipv4 routes and withdraw from peers */
2445 bgp_evpn_withdraw_type5_routes(bgp_vrf
, AFI_IP
, SAFI_UNICAST
);
2447 /* delete all ipv6 routes and withdraw from peers */
2448 bgp_evpn_withdraw_type5_routes(bgp_vrf
, AFI_IP6
, SAFI_UNICAST
);
2451 /* update and advertise all ipv4 and ipv6 routes in thr vrf table as type-5
2453 static void update_advertise_vrf_routes(struct bgp
*bgp_vrf
)
2455 /* update all ipv4 routes */
2456 bgp_evpn_advertise_type5_routes(bgp_vrf
, AFI_IP
, SAFI_UNICAST
);
2458 /* update all ipv6 routes */
2459 bgp_evpn_advertise_type5_routes(bgp_vrf
, AFI_IP6
, SAFI_UNICAST
);
2463 * update and advertise local routes for a VRF as type-5 routes.
2464 * This is invoked upon RD change for a VRF. Note taht the processing is only
2465 * done in the global route table using the routes which already exist in the
2468 static void update_router_id_vrf(struct bgp
*bgp_vrf
)
2470 /* skip if the RD is configured */
2471 if (is_vrf_rd_configured(bgp_vrf
))
2474 /* derive the RD for the VRF based on new router-id */
2475 bgp_evpn_derive_auto_rd_for_vrf(bgp_vrf
);
2477 /* update advertise ipv4|ipv6 routes as type-5 routes */
2478 update_advertise_vrf_routes(bgp_vrf
);
2482 * Delete and withdraw all type-5 routes for the RD corresponding to VRF.
2483 * This is invoked upon VRF RD change. The processing is done only from global
2486 static void withdraw_router_id_vrf(struct bgp
*bgp_vrf
)
2488 /* skip if the RD is configured */
2489 if (is_vrf_rd_configured(bgp_vrf
))
2492 /* delete/withdraw ipv4|ipv6 routes as type-5 routes */
2493 delete_withdraw_vrf_routes(bgp_vrf
);
2497 * Update and advertise local routes for a VNI. Invoked upon router-id
2498 * change. Note that the processing is done only on the global route table
2499 * using routes that already exist in the per-VNI table.
2501 static int update_advertise_vni_routes(struct bgp
*bgp
, struct bgpevpn
*vpn
)
2503 struct prefix_evpn p
;
2504 struct bgp_node
*rn
, *global_rn
;
2505 struct bgp_info
*ri
, *global_ri
;
2507 afi_t afi
= AFI_L2VPN
;
2508 safi_t safi
= SAFI_EVPN
;
2510 /* Locate type-3 route for VNI in the per-VNI table and use its
2511 * attributes to create and advertise the type-3 route for this VNI
2512 * in the global table.
2514 build_evpn_type3_prefix(&p
, vpn
->originator_ip
);
2515 rn
= bgp_node_lookup(vpn
->route_table
, (struct prefix
*)&p
);
2516 if (!rn
) /* unexpected */
2518 for (ri
= rn
->info
; ri
; ri
= ri
->next
)
2519 if (ri
->peer
== bgp
->peer_self
&& ri
->type
== ZEBRA_ROUTE_BGP
2520 && ri
->sub_type
== BGP_ROUTE_STATIC
)
2522 if (!ri
) /* unexpected */
2526 global_rn
= bgp_afi_node_get(bgp
->rib
[afi
][safi
], afi
, safi
,
2527 (struct prefix
*)&p
, &vpn
->prd
);
2528 update_evpn_route_entry(bgp
, vpn
, afi
, safi
, global_rn
, attr
, 1, 0, &ri
,
2531 /* Schedule for processing and unlock node. */
2532 bgp_process(bgp
, global_rn
, afi
, safi
);
2533 bgp_unlock_node(global_rn
);
2535 /* Now, walk this VNI's route table and use the route and its attribute
2536 * to create and schedule route in global table.
2538 for (rn
= bgp_table_top(vpn
->route_table
); rn
;
2539 rn
= bgp_route_next(rn
)) {
2540 struct prefix_evpn
*evp
= (struct prefix_evpn
*)&rn
->p
;
2542 /* Identify MAC-IP local routes. */
2543 if (evp
->prefix
.route_type
!= BGP_EVPN_MAC_IP_ROUTE
)
2546 for (ri
= rn
->info
; ri
; ri
= ri
->next
)
2547 if (ri
->peer
== bgp
->peer_self
2548 && ri
->type
== ZEBRA_ROUTE_BGP
2549 && ri
->sub_type
== BGP_ROUTE_STATIC
)
2554 /* Create route in global routing table using this route entry's
2558 global_rn
= bgp_afi_node_get(bgp
->rib
[afi
][safi
], afi
, safi
,
2559 (struct prefix
*)evp
, &vpn
->prd
);
2561 update_evpn_route_entry(bgp
, vpn
, afi
, safi
, global_rn
, attr
, 1,
2564 /* Schedule for processing and unlock node. */
2565 bgp_process(bgp
, global_rn
, afi
, safi
);
2566 bgp_unlock_node(global_rn
);
2573 * Delete (and withdraw) local routes for a VNI - only from the global
2574 * table. Invoked upon router-id change.
2576 static int delete_withdraw_vni_routes(struct bgp
*bgp
, struct bgpevpn
*vpn
)
2579 struct prefix_evpn p
;
2580 struct bgp_node
*global_rn
;
2581 struct bgp_info
*ri
;
2582 afi_t afi
= AFI_L2VPN
;
2583 safi_t safi
= SAFI_EVPN
;
2585 /* Delete and withdraw locally learnt type-2 routes (MACIP)
2586 * for this VNI - from the global table.
2588 ret
= delete_global_type2_routes(bgp
, vpn
);
2592 /* Remove type-3 route for this VNI from global table. */
2593 build_evpn_type3_prefix(&p
, vpn
->originator_ip
);
2594 global_rn
= bgp_afi_node_lookup(bgp
->rib
[afi
][safi
], afi
, safi
,
2595 (struct prefix
*)&p
, &vpn
->prd
);
2597 /* Delete route entry in the global EVPN table. */
2598 delete_evpn_route_entry(bgp
, vpn
, afi
, safi
, global_rn
, &ri
);
2600 /* Schedule for processing - withdraws to peers happen from
2604 bgp_process(bgp
, global_rn
, afi
, safi
);
2605 bgp_unlock_node(global_rn
);
2612 * Handle router-id change. Update and advertise local routes corresponding
2613 * to this VNI from peers. Note that this is invoked after updating the
2614 * router-id. The routes in the per-VNI table are used to create routes in
2615 * the global table and schedule them.
2617 static void update_router_id_vni(struct hash_backet
*backet
, struct bgp
*bgp
)
2619 struct bgpevpn
*vpn
;
2621 vpn
= (struct bgpevpn
*)backet
->data
;
2624 zlog_warn("%s: VNI hash entry for VNI not found", __FUNCTION__
);
2628 /* Skip VNIs with configured RD. */
2629 if (is_rd_configured(vpn
))
2632 bgp_evpn_derive_auto_rd(bgp
, vpn
);
2633 update_advertise_vni_routes(bgp
, vpn
);
2637 * Handle router-id change. Delete and withdraw local routes corresponding
2638 * to this VNI from peers. Note that this is invoked prior to updating
2639 * the router-id and is done only on the global route table, the routes
2640 * are needed in the per-VNI table to re-advertise with new router id.
2642 static void withdraw_router_id_vni(struct hash_backet
*backet
, struct bgp
*bgp
)
2644 struct bgpevpn
*vpn
;
2646 vpn
= (struct bgpevpn
*)backet
->data
;
2649 zlog_warn("%s: VNI hash entry for VNI not found", __FUNCTION__
);
2653 /* Skip VNIs with configured RD. */
2654 if (is_rd_configured(vpn
))
2657 delete_withdraw_vni_routes(bgp
, vpn
);
2661 * Process received EVPN type-2 route (advertise or withdraw).
2663 static int process_type2_route(struct peer
*peer
, afi_t afi
, safi_t safi
,
2664 struct attr
*attr
, u_char
*pfx
, int psize
,
2665 u_int32_t addpath_id
)
2667 struct prefix_rd prd
;
2668 struct prefix_evpn p
;
2671 mpls_label_t
*label_pnt
;
2674 /* Type-2 route should be either 33, 37 or 49 bytes or an
2675 * additional 3 bytes if there is a second label (VNI):
2676 * RD (8), ESI (10), Eth Tag (4), MAC Addr Len (1),
2677 * MAC Addr (6), IP len (1), IP (0, 4 or 16),
2678 * MPLS Lbl1 (3), MPLS Lbl2 (0 or 3)
2680 if (psize
!= 33 && psize
!= 37 && psize
!= 49 && psize
!= 36
2681 && psize
!= 40 && psize
!= 52) {
2682 zlog_err("%u:%s - Rx EVPN Type-2 NLRI with invalid length %d",
2683 peer
->bgp
->vrf_id
, peer
->host
, psize
);
2687 /* Make prefix_rd */
2688 prd
.family
= AF_UNSPEC
;
2690 memcpy(&prd
.val
, pfx
, 8);
2693 /* Make EVPN prefix. */
2694 memset(&p
, 0, sizeof(struct prefix_evpn
));
2696 p
.prefixlen
= EVPN_TYPE_2_ROUTE_PREFIXLEN
;
2697 p
.prefix
.route_type
= BGP_EVPN_MAC_IP_ROUTE
;
2699 /* Skip over Ethernet Seg Identifier for now. */
2702 /* Skip over Ethernet Tag for now. */
2705 /* Get the MAC Addr len */
2706 macaddr_len
= *pfx
++;
2708 /* Get the MAC Addr */
2709 if (macaddr_len
== (ETH_ALEN
* 8)) {
2710 memcpy(&p
.prefix
.mac
.octet
, pfx
, ETH_ALEN
);
2714 "%u:%s - Rx EVPN Type-2 NLRI with unsupported MAC address length %d",
2715 peer
->bgp
->vrf_id
, peer
->host
, macaddr_len
);
2721 ipaddr_len
= *pfx
++;
2722 if (ipaddr_len
!= 0 && ipaddr_len
!= IPV4_MAX_BITLEN
2723 && ipaddr_len
!= IPV6_MAX_BITLEN
) {
2725 "%u:%s - Rx EVPN Type-2 NLRI with unsupported IP address length %d",
2726 peer
->bgp
->vrf_id
, peer
->host
, ipaddr_len
);
2731 ipaddr_len
/= 8; /* Convert to bytes. */
2732 p
.prefix
.ip
.ipa_type
= (ipaddr_len
== IPV4_MAX_BYTELEN
)
2735 memcpy(&p
.prefix
.ip
.ip
.addr
, pfx
, ipaddr_len
);
2739 /* Get the VNI (in MPLS label field). */
2740 /* Note: We ignore the second VNI, if any. */
2741 label_pnt
= (mpls_label_t
*)pfx
;
2743 /* Process the route. */
2745 ret
= bgp_update(peer
, (struct prefix
*)&p
, addpath_id
, attr
,
2746 afi
, safi
, ZEBRA_ROUTE_BGP
, BGP_ROUTE_NORMAL
,
2747 &prd
, label_pnt
, 0, NULL
);
2749 ret
= bgp_withdraw(peer
, (struct prefix
*)&p
, addpath_id
, attr
,
2750 afi
, safi
, ZEBRA_ROUTE_BGP
, BGP_ROUTE_NORMAL
,
2751 &prd
, label_pnt
, NULL
);
2756 * Process received EVPN type-3 route (advertise or withdraw).
2758 static int process_type3_route(struct peer
*peer
, afi_t afi
, safi_t safi
,
2759 struct attr
*attr
, u_char
*pfx
, int psize
,
2760 u_int32_t addpath_id
)
2762 struct prefix_rd prd
;
2763 struct prefix_evpn p
;
2767 /* Type-3 route should be either 17 or 29 bytes: RD (8), Eth Tag (4),
2768 * IP len (1) and IP (4 or 16).
2770 if (psize
!= 17 && psize
!= 29) {
2771 zlog_err("%u:%s - Rx EVPN Type-3 NLRI with invalid length %d",
2772 peer
->bgp
->vrf_id
, peer
->host
, psize
);
2776 /* Make prefix_rd */
2777 prd
.family
= AF_UNSPEC
;
2779 memcpy(&prd
.val
, pfx
, 8);
2782 /* Make EVPN prefix. */
2783 memset(&p
, 0, sizeof(struct prefix_evpn
));
2785 p
.prefixlen
= EVPN_TYPE_3_ROUTE_PREFIXLEN
;
2786 p
.prefix
.route_type
= BGP_EVPN_IMET_ROUTE
;
2788 /* Skip over Ethernet Tag for now. */
2792 ipaddr_len
= *pfx
++;
2793 if (ipaddr_len
== IPV4_MAX_BITLEN
) {
2794 p
.prefix
.ip
.ipa_type
= IPADDR_V4
;
2795 memcpy(&p
.prefix
.ip
.ip
.addr
, pfx
, IPV4_MAX_BYTELEN
);
2798 "%u:%s - Rx EVPN Type-3 NLRI with unsupported IP address length %d",
2799 peer
->bgp
->vrf_id
, peer
->host
, ipaddr_len
);
2803 /* Process the route. */
2805 ret
= bgp_update(peer
, (struct prefix
*)&p
, addpath_id
, attr
,
2806 afi
, safi
, ZEBRA_ROUTE_BGP
, BGP_ROUTE_NORMAL
,
2807 &prd
, NULL
, 0, NULL
);
2809 ret
= bgp_withdraw(peer
, (struct prefix
*)&p
, addpath_id
, attr
,
2810 afi
, safi
, ZEBRA_ROUTE_BGP
, BGP_ROUTE_NORMAL
,
2816 * Process received EVPN type-5 route (advertise or withdraw).
2818 static int process_type5_route(struct peer
*peer
, afi_t afi
, safi_t safi
,
2819 struct attr
*attr
, u_char
*pfx
, int psize
,
2820 u_int32_t addpath_id
, int withdraw
)
2822 struct prefix_rd prd
;
2823 struct prefix_evpn p
;
2824 struct bgp_route_evpn evpn
;
2827 mpls_label_t
*label_pnt
;
2830 /* Type-5 route should be 34 or 58 bytes:
2831 * RD (8), ESI (10), Eth Tag (4), IP len (1), IP (4 or 16),
2832 * GW (4 or 16) and VNI (3).
2833 * Note that the IP and GW should both be IPv4 or both IPv6.
2835 if (psize
!= 34 && psize
!= 58) {
2836 zlog_err("%u:%s - Rx EVPN Type-5 NLRI with invalid length %d",
2837 peer
->bgp
->vrf_id
, peer
->host
, psize
);
2841 /* Make prefix_rd */
2842 prd
.family
= AF_UNSPEC
;
2844 memcpy(&prd
.val
, pfx
, 8);
2847 /* Make EVPN prefix. */
2848 memset(&p
, 0, sizeof(struct prefix_evpn
));
2850 p
.prefixlen
= EVPN_TYPE_5_ROUTE_PREFIXLEN
;
2851 p
.prefix
.route_type
= BGP_EVPN_IP_PREFIX_ROUTE
;
2853 /* Additional information outside of prefix - ESI and GW IP */
2854 memset(&evpn
, 0, sizeof(evpn
));
2857 memcpy(&evpn
.eth_s_id
.val
, pfx
, 10);
2860 /* Fetch Ethernet Tag. */
2861 memcpy(ð_tag
, pfx
, 4);
2862 p
.prefix
.eth_tag
= ntohl(eth_tag
);
2865 /* Fetch IP prefix length. */
2867 if (ippfx_len
> IPV6_MAX_BITLEN
) {
2869 "%u:%s - Rx EVPN Type-5 NLRI with invalid IP Prefix length %d",
2870 peer
->bgp
->vrf_id
, peer
->host
, ippfx_len
);
2873 p
.prefix
.ip_prefix_length
= ippfx_len
;
2875 /* Determine IPv4 or IPv6 prefix */
2876 /* Since the address and GW are from the same family, this just becomes
2877 * a simple check on the total size.
2880 SET_IPADDR_V4(&p
.prefix
.ip
);
2881 memcpy(&p
.prefix
.ip
.ipaddr_v4
, pfx
, 4);
2883 memcpy(&evpn
.gw_ip
.ipv4
, pfx
, 4);
2886 SET_IPADDR_V6(&p
.prefix
.ip
);
2887 memcpy(&p
.prefix
.ip
.ipaddr_v6
, pfx
, 16);
2889 memcpy(&evpn
.gw_ip
.ipv6
, pfx
, 16);
2893 label_pnt
= (mpls_label_t
*)pfx
;
2895 /* Process the route. */
2897 ret
= bgp_update(peer
, (struct prefix
*)&p
, addpath_id
, attr
,
2898 afi
, safi
, ZEBRA_ROUTE_BGP
, BGP_ROUTE_NORMAL
,
2899 &prd
, label_pnt
, 0, &evpn
);
2901 ret
= bgp_withdraw(peer
, (struct prefix
*)&p
, addpath_id
, attr
,
2902 afi
, safi
, ZEBRA_ROUTE_BGP
, BGP_ROUTE_NORMAL
,
2903 &prd
, label_pnt
, &evpn
);
2908 static void evpn_mpattr_encode_type5(struct stream
*s
, struct prefix
*p
,
2909 struct prefix_rd
*prd
, mpls_label_t
*label
,
2914 struct evpn_addr
*p_evpn_p
;
2916 memset(&temp
, 0, 16);
2917 if (p
->family
!= AF_EVPN
)
2919 p_evpn_p
= &(p
->u
.prefix_evpn
);
2921 /* len denites the total len of IP and GW-IP in the route
2922 IP and GW-IP have to be both ipv4 or ipv6 */
2923 if (IS_IPADDR_V4(&p_evpn_p
->ip
))
2924 len
= 8; /* IP and GWIP are both ipv4 */
2926 len
= 32; /* IP and GWIP are both ipv6 */
2927 /* Prefix contains RD, ESI, EthTag, IP length, IP, GWIP and VNI */
2928 stream_putc(s
, 8 + 10 + 4 + 1 + len
+ 3);
2929 stream_put(s
, prd
->val
, 8);
2931 stream_put(s
, &(attr
->evpn_overlay
.eth_s_id
), 10);
2933 stream_put(s
, &temp
, 10);
2934 stream_putl(s
, p_evpn_p
->eth_tag
);
2935 stream_putc(s
, p_evpn_p
->ip_prefix_length
);
2936 if (IS_IPADDR_V4(&p_evpn_p
->ip
))
2937 stream_put_ipv4(s
, p_evpn_p
->ip
.ipaddr_v4
.s_addr
);
2939 stream_put(s
, &p_evpn_p
->ip
.ipaddr_v6
, 16);
2941 if (IS_IPADDR_V4(&p_evpn_p
->ip
))
2943 attr
->evpn_overlay
.gw_ip
.ipv4
.s_addr
);
2945 stream_put(s
, &(attr
->evpn_overlay
.gw_ip
.ipv6
), 16);
2947 if (IS_IPADDR_V4(&p_evpn_p
->ip
))
2948 stream_put_ipv4(s
, 0);
2950 stream_put(s
, &temp
, 16);
2954 stream_put(s
, label
, 3);
2960 * Cleanup specific VNI upon EVPN (advertise-all-vni) being disabled.
2962 static void cleanup_vni_on_disable(struct hash_backet
*backet
, struct bgp
*bgp
)
2964 struct bgpevpn
*vpn
= (struct bgpevpn
*)backet
->data
;
2966 /* Remove EVPN routes and schedule for processing. */
2967 delete_routes_for_vni(bgp
, vpn
);
2969 /* Clear "live" flag and see if hash needs to be freed. */
2970 UNSET_FLAG(vpn
->flags
, VNI_FLAG_LIVE
);
2971 if (!is_vni_configured(vpn
))
2972 bgp_evpn_free(bgp
, vpn
);
2976 * Free a VNI entry; iterator function called during cleanup.
2978 static void free_vni_entry(struct hash_backet
*backet
, struct bgp
*bgp
)
2980 struct bgpevpn
*vpn
;
2982 vpn
= (struct bgpevpn
*)backet
->data
;
2983 delete_all_vni_routes(bgp
, vpn
);
2984 bgp_evpn_free(bgp
, vpn
);
2988 * Derive AUTO import RT for BGP VRF - L3VNI
2990 static void evpn_auto_rt_import_add_for_vrf(struct bgp
*bgp_vrf
)
2992 struct bgp
*bgp_def
= NULL
;
2994 form_auto_rt(bgp_vrf
, bgp_vrf
->l3vni
, bgp_vrf
->vrf_import_rtl
);
2995 UNSET_FLAG(bgp_vrf
->vrf_flags
, BGP_VRF_IMPORT_RT_CFGD
);
2998 bgp_def
= bgp_get_default();
3001 bgp_evpn_map_vrf_to_its_rts(bgp_vrf
);
3005 * Delete AUTO import RT from BGP VRF - L3VNI
3007 static void evpn_auto_rt_import_delete_for_vrf(struct bgp
*bgp_vrf
)
3009 evpn_rt_delete_auto(bgp_vrf
, bgp_vrf
->l3vni
, bgp_vrf
->vrf_import_rtl
);
3013 * Derive AUTO export RT for BGP VRF - L3VNI
3015 static void evpn_auto_rt_export_add_for_vrf(struct bgp
*bgp_vrf
)
3017 UNSET_FLAG(bgp_vrf
->vrf_flags
, BGP_VRF_EXPORT_RT_CFGD
);
3018 form_auto_rt(bgp_vrf
, bgp_vrf
->l3vni
, bgp_vrf
->vrf_export_rtl
);
3022 * Delete AUTO export RT from BGP VRF - L3VNI
3024 static void evpn_auto_rt_export_delete_for_vrf(struct bgp
*bgp_vrf
)
3026 evpn_rt_delete_auto(bgp_vrf
, bgp_vrf
->l3vni
, bgp_vrf
->vrf_export_rtl
);
3029 static void bgp_evpn_handle_export_rt_change_for_vrf(struct bgp
*bgp_vrf
)
3031 struct bgp
*bgp_def
= NULL
;
3032 struct listnode
*node
= NULL
;
3033 struct bgpevpn
*vpn
= NULL
;
3035 bgp_def
= bgp_get_default();
3039 /* update all type-5 routes */
3040 update_advertise_vrf_routes(bgp_vrf
);
3042 /* update all type-2 routes */
3043 for (ALL_LIST_ELEMENTS_RO(bgp_vrf
->l2vnis
, node
, vpn
))
3044 update_routes_for_vni(bgp_def
, vpn
);
3051 /* withdraw all type-5 routes for an address family */
3052 void bgp_evpn_withdraw_type5_routes(struct bgp
*bgp_vrf
,
3053 afi_t afi
, safi_t safi
)
3055 struct bgp_table
*table
= NULL
;
3056 struct bgp_node
*rn
= NULL
;
3058 if (!advertise_type5_routes(bgp_vrf
, afi
))
3061 table
= bgp_vrf
->rib
[afi
][safi
];
3062 for (rn
= bgp_table_top(table
); rn
; rn
= bgp_route_next(rn
)) {
3065 struct prefix_evpn evp
;
3066 char buf
[PREFIX_STRLEN
];
3068 build_type5_prefix_from_ip_prefix(&evp
, &rn
->p
);
3069 ret
= delete_evpn_type5_route(bgp_vrf
, &evp
);
3072 "%u failed to delete type-5 route for prefix %s in vrf %s",
3074 prefix2str(&rn
->p
, buf
, sizeof(buf
)),
3075 vrf_id_to_name(bgp_vrf
->vrf_id
));
3080 /* advertise all type-5 routes for an address family */
3081 void bgp_evpn_advertise_type5_routes(struct bgp
*bgp_vrf
,
3082 afi_t afi
, safi_t safi
)
3084 struct bgp_table
*table
= NULL
;
3085 struct bgp_node
*rn
= NULL
;
3087 if (!advertise_type5_routes(bgp_vrf
, afi
))
3090 table
= bgp_vrf
->rib
[afi
][safi
];
3091 for (rn
= bgp_table_top(table
); rn
; rn
= bgp_route_next(rn
)) {
3094 struct prefix_evpn evp
;
3095 char buf
[PREFIX_STRLEN
];
3100 /* only advertise subnet routes as type-5 */
3101 if (is_host_route(&rn
->p
))
3104 build_type5_prefix_from_ip_prefix(&evp
, &rn
->p
);
3105 ret
= update_evpn_type5_route(bgp_vrf
, &evp
);
3108 "%u failed to create type-5 route for prefix %s in vrf %s",
3110 prefix2str(&rn
->p
, buf
, sizeof(buf
)),
3111 vrf_id_to_name(bgp_vrf
->vrf_id
));
3116 void evpn_rt_delete_auto(struct bgp
*bgp
, vni_t vni
,
3119 struct listnode
*node
, *nnode
, *node_to_del
;
3120 struct ecommunity
*ecom
, *ecom_auto
;
3121 struct ecommunity_val eval
;
3123 encode_route_target_as((bgp
->as
& 0xFFFF), vni
, &eval
);
3125 ecom_auto
= ecommunity_new();
3126 ecommunity_add_val(ecom_auto
, &eval
);
3129 for (ALL_LIST_ELEMENTS(rtl
, node
, nnode
, ecom
)) {
3130 if (ecommunity_match(ecom
, ecom_auto
)) {
3131 ecommunity_free(&ecom
);
3137 list_delete_node(rtl
, node_to_del
);
3139 ecommunity_free(&ecom_auto
);
3142 void bgp_evpn_configure_import_rt_for_vrf(struct bgp
*bgp_vrf
,
3143 struct ecommunity
*ecomadd
)
3145 /* uninstall routes from vrf */
3146 uninstall_routes_for_vrf(bgp_vrf
);
3148 /* Cleanup the RT to VRF mapping */
3149 bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf
);
3151 /* Remove auto generated RT */
3152 evpn_auto_rt_import_delete_for_vrf(bgp_vrf
);
3154 /* Add the newly configured RT to RT list */
3155 listnode_add_sort(bgp_vrf
->vrf_import_rtl
, ecomadd
);
3156 SET_FLAG(bgp_vrf
->vrf_flags
, BGP_VRF_IMPORT_RT_CFGD
);
3158 /* map VRF to its RTs */
3159 bgp_evpn_map_vrf_to_its_rts(bgp_vrf
);
3161 /* install routes matching the new VRF */
3162 install_routes_for_vrf(bgp_vrf
);
3165 void bgp_evpn_unconfigure_import_rt_for_vrf(struct bgp
*bgp_vrf
,
3166 struct ecommunity
*ecomdel
)
3168 struct listnode
*node
= NULL
, *nnode
= NULL
, *node_to_del
= NULL
;
3169 struct ecommunity
*ecom
= NULL
;
3171 /* uninstall routes from vrf */
3172 uninstall_routes_for_vrf(bgp_vrf
);
3174 /* Cleanup the RT to VRF mapping */
3175 bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf
);
3177 /* remove the RT from the RT list */
3178 for (ALL_LIST_ELEMENTS(bgp_vrf
->vrf_import_rtl
, node
, nnode
, ecom
)) {
3179 if (ecommunity_match(ecom
, ecomdel
)) {
3180 ecommunity_free(&ecom
);
3187 list_delete_node(bgp_vrf
->vrf_import_rtl
, node_to_del
);
3189 /* fallback to auto import rt, if this was the last RT */
3190 if (list_isempty(bgp_vrf
->vrf_import_rtl
)) {
3191 UNSET_FLAG(bgp_vrf
->vrf_flags
, BGP_VRF_IMPORT_RT_CFGD
);
3192 evpn_auto_rt_import_add_for_vrf(bgp_vrf
);
3195 /* map VRFs to its RTs */
3196 bgp_evpn_map_vrf_to_its_rts(bgp_vrf
);
3198 /* install routes matching this new RT */
3199 install_routes_for_vrf(bgp_vrf
);
3202 void bgp_evpn_configure_export_rt_for_vrf(struct bgp
*bgp_vrf
,
3203 struct ecommunity
*ecomadd
)
3205 /* remove auto-generated RT */
3206 evpn_auto_rt_export_delete_for_vrf(bgp_vrf
);
3208 /* Add the new RT to the RT list */
3209 listnode_add_sort(bgp_vrf
->vrf_export_rtl
, ecomadd
);
3210 SET_FLAG(bgp_vrf
->vrf_flags
, BGP_VRF_EXPORT_RT_CFGD
);
3212 bgp_evpn_handle_export_rt_change_for_vrf(bgp_vrf
);
3216 void bgp_evpn_unconfigure_export_rt_for_vrf(struct bgp
*bgp_vrf
,
3217 struct ecommunity
*ecomdel
)
3219 struct listnode
*node
= NULL
, *nnode
= NULL
, *node_to_del
= NULL
;
3220 struct ecommunity
*ecom
= NULL
;
3222 /* Remove the RT from the RT list */
3223 for (ALL_LIST_ELEMENTS(bgp_vrf
->vrf_export_rtl
, node
, nnode
, ecom
)) {
3224 if (ecommunity_match(ecom
, ecomdel
)) {
3225 ecommunity_free(&ecom
);
3232 list_delete_node(bgp_vrf
->vrf_export_rtl
, node_to_del
);
3234 /* fall back to auto-generated RT if this was the last RT */
3235 if (list_isempty(bgp_vrf
->vrf_export_rtl
)) {
3236 UNSET_FLAG(bgp_vrf
->vrf_flags
, BGP_VRF_EXPORT_RT_CFGD
);
3237 evpn_auto_rt_export_add_for_vrf(bgp_vrf
);
3240 bgp_evpn_handle_export_rt_change_for_vrf(bgp_vrf
);
3244 * Handle change to BGP router id. This is invoked twice by the change
3245 * handler, first before the router id has been changed and then after
3246 * the router id has been changed. The first invocation will result in
3247 * local routes for all VNIs/VRF being deleted and withdrawn and the next
3248 * will result in the routes being re-advertised.
3250 void bgp_evpn_handle_router_id_update(struct bgp
*bgp
, int withdraw
)
3254 /* delete and withdraw all the type-5 routes
3255 stored in the global table for this vrf */
3256 withdraw_router_id_vrf(bgp
);
3258 /* delete all the VNI routes (type-2/type-3) routes for all the
3260 hash_iterate(bgp
->vnihash
,
3261 (void (*)(struct hash_backet
*,
3262 void *))withdraw_router_id_vni
,
3266 /* advertise all routes in the vrf as type-5 routes with the new
3268 update_router_id_vrf(bgp
);
3270 /* advertise all the VNI routes (type-2/type-3) routes with the
3272 hash_iterate(bgp
->vnihash
,
3273 (void (*)(struct hash_backet
*,
3274 void *))update_router_id_vni
,
3280 * Handle change to export RT - update and advertise local routes.
3282 int bgp_evpn_handle_export_rt_change(struct bgp
*bgp
, struct bgpevpn
*vpn
)
3284 return update_routes_for_vni(bgp
, vpn
);
3287 void bgp_evpn_handle_vrf_rd_change(struct bgp
*bgp_vrf
,
3291 delete_withdraw_vrf_routes(bgp_vrf
);
3293 update_advertise_vrf_routes(bgp_vrf
);
3297 * Handle change to RD. This is invoked twice by the change handler,
3298 * first before the RD has been changed and then after the RD has
3299 * been changed. The first invocation will result in local routes
3300 * of this VNI being deleted and withdrawn and the next will result
3301 * in the routes being re-advertised.
3303 void bgp_evpn_handle_rd_change(struct bgp
*bgp
, struct bgpevpn
*vpn
,
3307 delete_withdraw_vni_routes(bgp
, vpn
);
3309 update_advertise_vni_routes(bgp
, vpn
);
3313 * Install routes for this VNI. Invoked upon change to Import RT.
3315 int bgp_evpn_install_routes(struct bgp
*bgp
, struct bgpevpn
*vpn
)
3317 return install_routes_for_vni(bgp
, vpn
);
3321 * Uninstall all routes installed for this VNI. Invoked upon change
3324 int bgp_evpn_uninstall_routes(struct bgp
*bgp
, struct bgpevpn
*vpn
)
3326 return uninstall_routes_for_vni(bgp
, vpn
);
3330 * Function to display "tag" in route as a VNI.
3332 char *bgp_evpn_label2str(mpls_label_t
*label
, char *buf
, int len
)
3336 vni
= label2vni(label
);
3337 snprintf(buf
, len
, "%u", vni
);
3342 * Function to convert evpn route to json format.
3343 * NOTE: We don't use prefix2str as the output here is a bit different.
3345 void bgp_evpn_route2json(struct prefix_evpn
*p
, json_object
*json
)
3347 char buf1
[ETHER_ADDR_STRLEN
];
3348 char buf2
[PREFIX2STR_BUFFER
];
3353 if (p
->prefix
.route_type
== BGP_EVPN_IMET_ROUTE
) {
3354 json_object_int_add(json
, "routeType", p
->prefix
.route_type
);
3355 json_object_int_add(json
, "ethTag", 0);
3356 json_object_int_add(json
, "ipLen",
3357 IS_EVPN_PREFIX_IPADDR_V4(p
)
3360 json_object_string_add(json
, "ip",
3361 inet_ntoa(p
->prefix
.ip
.ipaddr_v4
));
3362 } else if (p
->prefix
.route_type
== BGP_EVPN_MAC_IP_ROUTE
) {
3363 if (IS_EVPN_PREFIX_IPADDR_NONE(p
)) {
3364 json_object_int_add(json
, "routeType",
3365 p
->prefix
.route_type
);
3366 json_object_int_add(
3368 0); /* TODO: we don't support esi yet */
3369 json_object_int_add(json
, "ethTag", 0);
3370 json_object_int_add(json
, "macLen", 8 * ETH_ALEN
);
3371 json_object_string_add(json
, "mac",
3372 prefix_mac2str(&p
->prefix
.mac
,
3378 family
= IS_EVPN_PREFIX_IPADDR_V4(p
) ? AF_INET
3381 json_object_int_add(json
, "routeType",
3382 p
->prefix
.route_type
);
3383 json_object_int_add(
3385 0); /* TODO: we don't support esi yet */
3386 json_object_int_add(json
, "ethTag", 0);
3387 json_object_int_add(json
, "macLen", 8 * ETH_ALEN
);
3388 json_object_string_add(json
, "mac",
3389 prefix_mac2str(&p
->prefix
.mac
,
3392 json_object_int_add(json
, "ipLen",
3393 IS_EVPN_PREFIX_IPADDR_V4(p
)
3396 json_object_string_add(
3398 inet_ntop(family
, &p
->prefix
.ip
.ip
.addr
, buf2
,
3399 PREFIX2STR_BUFFER
));
3402 /* Currently, this is to cater to other AF_ETHERNET code. */
3407 * Function to convert evpn route to string.
3408 * NOTE: We don't use prefix2str as the output here is a bit different.
3410 char *bgp_evpn_route2str(struct prefix_evpn
*p
, char *buf
, int len
)
3412 char buf1
[ETHER_ADDR_STRLEN
];
3413 char buf2
[PREFIX2STR_BUFFER
];
3415 if (p
->prefix
.route_type
== BGP_EVPN_IMET_ROUTE
) {
3416 snprintf(buf
, len
, "[%d]:[0]:[%d]:[%s]", p
->prefix
.route_type
,
3417 IS_EVPN_PREFIX_IPADDR_V4(p
) ? IPV4_MAX_BITLEN
3419 inet_ntoa(p
->prefix
.ip
.ipaddr_v4
));
3420 } else if (p
->prefix
.route_type
== BGP_EVPN_MAC_IP_ROUTE
) {
3421 if (IS_EVPN_PREFIX_IPADDR_NONE(p
))
3422 snprintf(buf
, len
, "[%d]:[0]:[0]:[%d]:[%s]",
3423 p
->prefix
.route_type
, 8 * ETH_ALEN
,
3424 prefix_mac2str(&p
->prefix
.mac
, buf1
,
3429 family
= IS_EVPN_PREFIX_IPADDR_V4(p
) ? AF_INET
3431 snprintf(buf
, len
, "[%d]:[0]:[0]:[%d]:[%s]:[%d]:[%s]",
3432 p
->prefix
.route_type
, 8 * ETH_ALEN
,
3433 prefix_mac2str(&p
->prefix
.mac
, buf1
,
3435 family
== AF_INET
? IPV4_MAX_BITLEN
3437 inet_ntop(family
, &p
->prefix
.ip
.ip
.addr
, buf2
,
3438 PREFIX2STR_BUFFER
));
3440 } else if (p
->prefix
.route_type
== BGP_EVPN_IP_PREFIX_ROUTE
) {
3441 snprintf(buf
, len
, "[%d]:[0]:[%d]:[%s]",
3442 p
->prefix
.route_type
,
3443 p
->prefix
.ip_prefix_length
,
3444 IS_EVPN_PREFIX_IPADDR_V4(p
) ?
3445 inet_ntoa(p
->prefix
.ip
.ipaddr_v4
) :
3446 inet6_ntoa(p
->prefix
.ip
.ipaddr_v6
));
3448 /* For EVPN route types not supported yet. */
3449 snprintf(buf
, len
, "(unsupported route type %d)",
3450 p
->prefix
.route_type
);
3457 * Encode EVPN prefix in Update (MP_REACH)
3459 void bgp_evpn_encode_prefix(struct stream
*s
, struct prefix
*p
,
3460 struct prefix_rd
*prd
, mpls_label_t
*label
,
3461 struct attr
*attr
, int addpath_encode
,
3462 u_int32_t addpath_tx_id
)
3464 struct prefix_evpn
*evp
= (struct prefix_evpn
*)p
;
3468 stream_putl(s
, addpath_tx_id
);
3471 stream_putc(s
, evp
->prefix
.route_type
);
3473 switch (evp
->prefix
.route_type
) {
3474 case BGP_EVPN_MAC_IP_ROUTE
:
3475 if (IS_EVPN_PREFIX_IPADDR_V4(evp
))
3476 ipa_len
= IPV4_MAX_BYTELEN
;
3477 else if (IS_EVPN_PREFIX_IPADDR_V6(evp
))
3478 ipa_len
= IPV6_MAX_BYTELEN
;
3479 stream_putc(s
, 33 + ipa_len
); // 1 VNI
3480 stream_put(s
, prd
->val
, 8); /* RD */
3481 stream_put(s
, 0, 10); /* ESI */
3482 stream_putl(s
, 0); /* Ethernet Tag ID */
3483 stream_putc(s
, 8 * ETH_ALEN
); /* Mac Addr Len - bits */
3484 stream_put(s
, evp
->prefix
.mac
.octet
, 6); /* Mac Addr */
3485 stream_putc(s
, 8 * ipa_len
); /* IP address Length */
3487 stream_put(s
, &evp
->prefix
.ip
.ip
.addr
,
3489 stream_put(s
, label
,
3490 BGP_LABEL_BYTES
); /* VNI is contained in 'tag' */
3493 case BGP_EVPN_IMET_ROUTE
:
3494 stream_putc(s
, 17); // TODO: length - assumes IPv4 address
3495 stream_put(s
, prd
->val
, 8); /* RD */
3496 stream_putl(s
, 0); /* Ethernet Tag ID */
3497 stream_putc(s
, IPV4_MAX_BITLEN
); /* IP address Length - bits */
3498 /* Originating Router's IP Addr */
3499 stream_put_in_addr(s
, &evp
->prefix
.ip
.ipaddr_v4
);
3502 case BGP_EVPN_IP_PREFIX_ROUTE
:
3503 /* TODO: AddPath support. */
3504 evpn_mpattr_encode_type5(s
, p
, prd
, label
, attr
);
3512 int bgp_nlri_parse_evpn(struct peer
*peer
, struct attr
*attr
,
3513 struct bgp_nlri
*packet
, int withdraw
)
3519 u_int32_t addpath_id
;
3520 int addpath_encoded
;
3526 /* Check peer status. */
3527 if (peer
->status
!= Established
) {
3528 zlog_err("%u:%s - EVPN update received in state %d",
3529 peer
->bgp
->vrf_id
, peer
->host
, peer
->status
);
3533 /* Start processing the NLRI - there may be multiple in the MP_REACH */
3535 lim
= pnt
+ packet
->length
;
3537 safi
= packet
->safi
;
3541 (CHECK_FLAG(peer
->af_cap
[afi
][safi
], PEER_CAP_ADDPATH_AF_RX_ADV
)
3542 && CHECK_FLAG(peer
->af_cap
[afi
][safi
],
3543 PEER_CAP_ADDPATH_AF_TX_RCV
));
3545 for (; pnt
< lim
; pnt
+= psize
) {
3546 /* Clear prefix structure. */
3547 memset(&p
, 0, sizeof(struct prefix
));
3549 /* Deal with path-id if AddPath is supported. */
3550 if (addpath_encoded
) {
3551 /* When packet overflow occurs return immediately. */
3552 if (pnt
+ BGP_ADDPATH_ID_LEN
> lim
)
3555 addpath_id
= ntohl(*((uint32_t *)pnt
));
3556 pnt
+= BGP_ADDPATH_ID_LEN
;
3559 /* All EVPN NLRI types start with type and length. */
3564 psize
= rlen
= *pnt
++;
3566 /* When packet overflow occur return immediately. */
3567 if (pnt
+ psize
> lim
)
3571 case BGP_EVPN_MAC_IP_ROUTE
:
3572 if (process_type2_route(peer
, afi
, safi
,
3573 withdraw
? NULL
: attr
, pnt
,
3574 psize
, addpath_id
)) {
3576 "%u:%s - Error in processing EVPN type-2 NLRI size %d",
3577 peer
->bgp
->vrf_id
, peer
->host
, psize
);
3582 case BGP_EVPN_IMET_ROUTE
:
3583 if (process_type3_route(peer
, afi
, safi
,
3584 withdraw
? NULL
: attr
, pnt
,
3585 psize
, addpath_id
)) {
3587 "%u:%s - Error in processing EVPN type-3 NLRI size %d",
3588 peer
->bgp
->vrf_id
, peer
->host
, psize
);
3593 case BGP_EVPN_IP_PREFIX_ROUTE
:
3594 if (process_type5_route(peer
, afi
, safi
, attr
, pnt
,
3595 psize
, addpath_id
, withdraw
)) {
3597 "%u:%s - Error in processing EVPN type-5 NLRI size %d",
3598 peer
->bgp
->vrf_id
, peer
->host
, psize
);
3608 /* Packet length consistency check. */
3616 * Map the RTs (configured or automatically derived) of a VRF to the VRF.
3617 * The mapping will be used during route processing.
3618 * bgp_def: default bgp instance
3619 * bgp_vrf: specific bgp vrf instance on which RT is configured
3621 void bgp_evpn_map_vrf_to_its_rts(struct bgp
*bgp_vrf
)
3624 struct ecommunity_val
*eval
= NULL
;
3625 struct listnode
*node
= NULL
, *nnode
= NULL
;
3626 struct ecommunity
*ecom
= NULL
;
3628 for (ALL_LIST_ELEMENTS(bgp_vrf
->vrf_import_rtl
, node
, nnode
, ecom
)) {
3629 for (i
= 0; i
< ecom
->size
; i
++) {
3630 eval
= (struct ecommunity_val
*)(ecom
->val
3632 * ECOMMUNITY_SIZE
));
3633 map_vrf_to_rt(bgp_vrf
, eval
);
3639 * Unmap the RTs (configured or automatically derived) of a VRF from the VRF.
3641 void bgp_evpn_unmap_vrf_from_its_rts(struct bgp
*bgp_vrf
)
3644 struct ecommunity_val
*eval
;
3645 struct listnode
*node
, *nnode
;
3646 struct ecommunity
*ecom
;
3648 for (ALL_LIST_ELEMENTS(bgp_vrf
->vrf_import_rtl
, node
, nnode
, ecom
)) {
3649 for (i
= 0; i
< ecom
->size
; i
++) {
3650 struct vrf_irt_node
*irt
;
3651 struct ecommunity_val eval_tmp
;
3653 eval
= (struct ecommunity_val
*)(ecom
->val
3655 * ECOMMUNITY_SIZE
));
3656 /* If using "automatic" RT, we only care about the
3657 * local-admin sub-field.
3658 * This is to facilitate using VNI as the RT for EBGP
3661 memcpy(&eval_tmp
, eval
, ECOMMUNITY_SIZE
);
3662 if (!CHECK_FLAG(bgp_vrf
->vrf_flags
,
3663 BGP_VRF_IMPORT_RT_CFGD
))
3664 mask_ecom_global_admin(&eval_tmp
, eval
);
3666 irt
= lookup_vrf_import_rt(&eval_tmp
);
3668 unmap_vrf_from_rt(bgp_vrf
, irt
);
3676 * Map the RTs (configured or automatically derived) of a VNI to the VNI.
3677 * The mapping will be used during route processing.
3679 void bgp_evpn_map_vni_to_its_rts(struct bgp
*bgp
, struct bgpevpn
*vpn
)
3682 struct ecommunity_val
*eval
;
3683 struct listnode
*node
, *nnode
;
3684 struct ecommunity
*ecom
;
3686 for (ALL_LIST_ELEMENTS(vpn
->import_rtl
, node
, nnode
, ecom
)) {
3687 for (i
= 0; i
< ecom
->size
; i
++) {
3688 eval
= (struct ecommunity_val
*)(ecom
->val
3690 * ECOMMUNITY_SIZE
));
3691 map_vni_to_rt(bgp
, vpn
, eval
);
3697 * Unmap the RTs (configured or automatically derived) of a VNI from the VNI.
3699 void bgp_evpn_unmap_vni_from_its_rts(struct bgp
*bgp
, struct bgpevpn
*vpn
)
3702 struct ecommunity_val
*eval
;
3703 struct listnode
*node
, *nnode
;
3704 struct ecommunity
*ecom
;
3706 for (ALL_LIST_ELEMENTS(vpn
->import_rtl
, node
, nnode
, ecom
)) {
3707 for (i
= 0; i
< ecom
->size
; i
++) {
3708 struct irt_node
*irt
;
3709 struct ecommunity_val eval_tmp
;
3711 eval
= (struct ecommunity_val
*)(ecom
->val
3713 * ECOMMUNITY_SIZE
));
3714 /* If using "automatic" RT, we only care about the
3715 * local-admin sub-field.
3716 * This is to facilitate using VNI as the RT for EBGP
3719 memcpy(&eval_tmp
, eval
, ECOMMUNITY_SIZE
);
3720 if (!is_import_rt_configured(vpn
))
3721 mask_ecom_global_admin(&eval_tmp
, eval
);
3723 irt
= lookup_import_rt(bgp
, &eval_tmp
);
3725 unmap_vni_from_rt(bgp
, vpn
, irt
);
3731 * Derive Import RT automatically for VNI and map VNI to RT.
3732 * The mapping will be used during route processing.
3734 void bgp_evpn_derive_auto_rt_import(struct bgp
*bgp
, struct bgpevpn
*vpn
)
3736 form_auto_rt(bgp
, vpn
->vni
, vpn
->import_rtl
);
3737 UNSET_FLAG(vpn
->flags
, VNI_FLAG_IMPRT_CFGD
);
3740 bgp_evpn_map_vni_to_its_rts(bgp
, vpn
);
3744 * Derive Export RT automatically for VNI.
3746 void bgp_evpn_derive_auto_rt_export(struct bgp
*bgp
, struct bgpevpn
*vpn
)
3748 form_auto_rt(bgp
, vpn
->vni
, vpn
->export_rtl
);
3749 UNSET_FLAG(vpn
->flags
, VNI_FLAG_EXPRT_CFGD
);
3753 * Derive RD automatically for VNI using passed information - it
3754 * is of the form RouterId:unique-id-for-vni.
3756 void bgp_evpn_derive_auto_rd_for_vrf(struct bgp
*bgp
)
3760 bgp
->vrf_prd
.family
= AF_UNSPEC
;
3761 bgp
->vrf_prd
.prefixlen
= 64;
3762 sprintf(buf
, "%s:%hu", inet_ntoa(bgp
->router_id
), bgp
->vrf_rd_id
);
3763 str2prefix_rd(buf
, &bgp
->vrf_prd
);
3767 * Derive RD automatically for VNI using passed information - it
3768 * is of the form RouterId:unique-id-for-vni.
3770 void bgp_evpn_derive_auto_rd(struct bgp
*bgp
, struct bgpevpn
*vpn
)
3774 vpn
->prd
.family
= AF_UNSPEC
;
3775 vpn
->prd
.prefixlen
= 64;
3776 sprintf(buf
, "%s:%hu", inet_ntoa(bgp
->router_id
), vpn
->rd_id
);
3777 (void)str2prefix_rd(buf
, &vpn
->prd
);
3778 UNSET_FLAG(vpn
->flags
, VNI_FLAG_RD_CFGD
);
3784 struct bgpevpn
*bgp_evpn_lookup_vni(struct bgp
*bgp
, vni_t vni
)
3786 struct bgpevpn
*vpn
;
3789 memset(&tmp
, 0, sizeof(struct bgpevpn
));
3791 vpn
= hash_lookup(bgp
->vnihash
, &tmp
);
3796 * Create a new vpn - invoked upon configuration or zebra notification.
3798 struct bgpevpn
*bgp_evpn_new(struct bgp
*bgp
, vni_t vni
,
3799 struct in_addr originator_ip
,
3800 vrf_id_t tenant_vrf_id
)
3802 struct bgpevpn
*vpn
;
3807 vpn
= XCALLOC(MTYPE_BGP_EVPN
, sizeof(struct bgpevpn
));
3811 /* Set values - RD and RT set to defaults. */
3813 vpn
->originator_ip
= originator_ip
;
3814 vpn
->tenant_vrf_id
= tenant_vrf_id
;
3816 /* Initialize route-target import and export lists */
3817 vpn
->import_rtl
= list_new();
3818 vpn
->import_rtl
->cmp
= (int (*)(void *, void *))evpn_route_target_cmp
;
3819 vpn
->export_rtl
= list_new();
3820 vpn
->export_rtl
->cmp
= (int (*)(void *, void *))evpn_route_target_cmp
;
3821 bf_assign_index(bm
->rd_idspace
, vpn
->rd_id
);
3822 derive_rd_rt_for_vni(bgp
, vpn
);
3824 /* Initialize EVPN route table. */
3825 vpn
->route_table
= bgp_table_init(AFI_L2VPN
, SAFI_EVPN
);
3828 if (!hash_get(bgp
->vnihash
, vpn
, hash_alloc_intern
)) {
3829 XFREE(MTYPE_BGP_EVPN
, vpn
);
3833 /* add to l2vni list on corresponding vrf */
3834 bgpevpn_link_to_l3vni(vpn
);
3836 QOBJ_REG(vpn
, bgpevpn
);
3841 * Free a given VPN - called in multiple scenarios such as zebra
3842 * notification, configuration being deleted, advertise-all-vni disabled etc.
3843 * This just frees appropriate memory, caller should have taken other
3846 void bgp_evpn_free(struct bgp
*bgp
, struct bgpevpn
*vpn
)
3848 bgpevpn_unlink_from_l3vni(vpn
);
3849 bgp_table_unlock(vpn
->route_table
);
3850 bgp_evpn_unmap_vni_from_its_rts(bgp
, vpn
);
3851 list_delete_and_null(&vpn
->import_rtl
);
3852 list_delete_and_null(&vpn
->export_rtl
);
3853 bf_release_index(bm
->rd_idspace
, vpn
->rd_id
);
3854 hash_release(bgp
->vnihash
, vpn
);
3856 XFREE(MTYPE_BGP_EVPN
, vpn
);
3860 * Import route into matching VNI(s).
3862 int bgp_evpn_import_route(struct bgp
*bgp
, afi_t afi
, safi_t safi
,
3863 struct prefix
*p
, struct bgp_info
*ri
)
3865 return install_uninstall_evpn_route(bgp
, afi
, safi
, p
, ri
, 1);
3869 * Unimport route from matching VNI(s).
3871 int bgp_evpn_unimport_route(struct bgp
*bgp
, afi_t afi
, safi_t safi
,
3872 struct prefix
*p
, struct bgp_info
*ri
)
3874 return install_uninstall_evpn_route(bgp
, afi
, safi
, p
, ri
, 0);
3877 /* filter routes which have martian next hops */
3878 int bgp_filter_evpn_routes_upon_martian_nh_change(struct bgp
*bgp
)
3882 struct bgp_node
*rd_rn
, *rn
;
3883 struct bgp_table
*table
;
3884 struct bgp_info
*ri
;
3889 /* Walk entire global routing table and evaluate routes which could be
3890 * imported into this VPN. Note that we cannot just look at the routes
3891 * for the VNI's RD -
3892 * remote routes applicable for this VNI could have any RD.
3894 /* EVPN routes are a 2-level table. */
3895 for (rd_rn
= bgp_table_top(bgp
->rib
[afi
][safi
]); rd_rn
;
3896 rd_rn
= bgp_route_next(rd_rn
)) {
3897 table
= (struct bgp_table
*)(rd_rn
->info
);
3901 for (rn
= bgp_table_top(table
); rn
; rn
= bgp_route_next(rn
)) {
3903 for (ri
= rn
->info
; ri
; ri
= ri
->next
) {
3905 /* Consider "valid" remote routes applicable for
3907 if (!(ri
->type
== ZEBRA_ROUTE_BGP
3908 && ri
->sub_type
== BGP_ROUTE_NORMAL
))
3911 if (bgp_nexthop_self(bgp
, ri
->attr
->nexthop
)) {
3913 char attr_str
[BUFSIZ
];
3914 char pbuf
[PREFIX_STRLEN
];
3916 bgp_dump_attr(ri
->attr
, attr_str
,
3919 if (bgp_debug_update(ri
->peer
, &rn
->p
,
3922 "%u: prefix %s with attr %s - DENIED due to martian or self nexthop",
3929 bgp_evpn_unimport_route(bgp
, afi
, safi
,
3932 bgp_rib_remove(rn
, ri
, ri
->peer
, afi
,
3943 * Handle del of a local MACIP.
3945 int bgp_evpn_local_macip_del(struct bgp
*bgp
, vni_t vni
, struct ethaddr
*mac
,
3948 struct bgpevpn
*vpn
;
3949 struct prefix_evpn p
;
3951 if (!bgp
->vnihash
) {
3952 zlog_err("%u: VNI hash not created", bgp
->vrf_id
);
3956 /* Lookup VNI hash - should exist. */
3957 vpn
= bgp_evpn_lookup_vni(bgp
, vni
);
3958 if (!vpn
|| !is_vni_live(vpn
)) {
3959 zlog_warn("%u: VNI hash entry for VNI %u %s at MACIP DEL",
3960 bgp
->vrf_id
, vni
, vpn
? "not live" : "not found");
3964 /* Remove EVPN type-2 route and schedule for processing. */
3965 build_evpn_type2_prefix(&p
, mac
, ip
);
3966 delete_evpn_route(bgp
, vpn
, &p
);
3972 * Handle add of a local MACIP.
3974 int bgp_evpn_local_macip_add(struct bgp
*bgp
, vni_t vni
, struct ethaddr
*mac
,
3975 struct ipaddr
*ip
, u_char flags
)
3977 struct bgpevpn
*vpn
;
3978 struct prefix_evpn p
;
3980 if (!bgp
->vnihash
) {
3981 zlog_err("%u: VNI hash not created", bgp
->vrf_id
);
3985 /* Lookup VNI hash - should exist. */
3986 vpn
= bgp_evpn_lookup_vni(bgp
, vni
);
3987 if (!vpn
|| !is_vni_live(vpn
)) {
3988 zlog_warn("%u: VNI hash entry for VNI %u %s at MACIP ADD",
3989 bgp
->vrf_id
, vni
, vpn
? "not live" : "not found");
3993 /* Create EVPN type-2 route and schedule for processing. */
3994 build_evpn_type2_prefix(&p
, mac
, ip
);
3995 if (update_evpn_route(bgp
, vpn
, &p
, flags
)) {
3996 char buf
[ETHER_ADDR_STRLEN
];
3997 char buf2
[INET6_ADDRSTRLEN
];
4000 "%u:Failed to create Type-2 route, VNI %u %s MAC %s IP %s",
4001 bgp
->vrf_id
, vpn
->vni
,
4002 CHECK_FLAG(flags
, ZEBRA_MAC_TYPE_STICKY
) ? "sticky gateway"
4004 prefix_mac2str(mac
, buf
, sizeof(buf
)),
4005 ipaddr2str(ip
, buf2
, sizeof(buf2
)));
4012 static void link_l2vni_hash_to_l3vni(struct hash_backet
*backet
,
4013 struct bgp
*bgp_vrf
)
4015 struct bgpevpn
*vpn
= NULL
;
4016 struct bgp
*bgp_def
= NULL
;
4018 bgp_def
= bgp_get_default();
4021 vpn
= (struct bgpevpn
*)backet
->data
;
4022 if (vpn
->tenant_vrf_id
== bgp_vrf
->vrf_id
)
4023 bgpevpn_link_to_l3vni(vpn
);
4026 int bgp_evpn_local_l3vni_add(vni_t l3vni
,
4028 struct ethaddr
*rmac
,
4029 struct in_addr originator_ip
)
4031 struct bgp
*bgp_vrf
= NULL
; /* bgp VRF instance */
4032 struct bgp
*bgp_def
= NULL
; /* default bgp instance */
4033 struct listnode
*node
= NULL
;
4034 struct bgpevpn
*vpn
= NULL
;
4037 /* get the default instamce - required to get the AS number for VRF
4039 bgp_def
= bgp_get_default();
4041 zlog_err("Cannot process L3VNI %u ADD - default BGP instance not yet created",
4047 /* if the BGP vrf instance doesnt exist - create one */
4048 bgp_vrf
= bgp_lookup_by_name(vrf_id_to_name(vrf_id
));
4053 ret
= bgp_get(&bgp_vrf
, &as
, vrf_id_to_name(vrf_id
),
4054 BGP_INSTANCE_TYPE_VRF
);
4056 case BGP_ERR_MULTIPLE_INSTANCE_NOT_SET
:
4057 zlog_err("'bgp multiple-instance' not present\n");
4059 case BGP_ERR_AS_MISMATCH
:
4060 zlog_err("BGP is already running; AS is %u\n", as
);
4062 case BGP_ERR_INSTANCE_MISMATCH
:
4063 zlog_err("BGP instance name and AS number mismatch\n");
4067 /* mark as auto created */
4068 SET_FLAG(bgp_vrf
->vrf_flags
, BGP_VRF_AUTO
);
4071 /* associate with l3vni */
4072 bgp_vrf
->l3vni
= l3vni
;
4074 /* set the router mac - to be used in mac-ip routes for this vrf */
4075 memcpy(&bgp_vrf
->rmac
, rmac
, sizeof(struct ethaddr
));
4077 /* set the originator ip */
4078 bgp_vrf
->originator_ip
= originator_ip
;
4080 /* auto derive RD/RT */
4081 if (!CHECK_FLAG(bgp_vrf
->vrf_flags
, BGP_VRF_IMPORT_RT_CFGD
))
4082 evpn_auto_rt_import_add_for_vrf(bgp_vrf
);
4083 if (!CHECK_FLAG(bgp_vrf
->vrf_flags
, BGP_VRF_EXPORT_RT_CFGD
))
4084 evpn_auto_rt_export_add_for_vrf(bgp_vrf
);
4085 bgp_evpn_derive_auto_rd_for_vrf(bgp_vrf
);
4087 /* link all corresponding l2vnis */
4088 hash_iterate(bgp_def
->vnihash
,
4089 (void (*)(struct hash_backet
*, void *))
4090 link_l2vni_hash_to_l3vni
,
4093 /* updates all corresponding local mac-ip routes */
4094 for (ALL_LIST_ELEMENTS_RO(bgp_vrf
->l2vnis
, node
, vpn
))
4095 update_routes_for_vni(bgp_def
, vpn
);
4097 /* advertise type-5 routes if needed */
4098 update_advertise_vrf_routes(bgp_vrf
);
4100 /* install all remote routes belonging to this l3vni into correspondng
4102 install_routes_for_vrf(bgp_vrf
);
4107 int bgp_evpn_local_l3vni_del(vni_t l3vni
,
4110 struct bgp
*bgp_vrf
= NULL
; /* bgp vrf instance */
4111 struct bgp
*bgp_def
= NULL
; /* default bgp instance */
4112 struct listnode
*node
= NULL
;
4113 struct bgpevpn
*vpn
= NULL
;
4115 bgp_vrf
= bgp_lookup_by_vrf_id(vrf_id
);
4117 zlog_err("Cannot process L3VNI %u Del - Could not find BGP instance",
4122 bgp_def
= bgp_get_default();
4124 zlog_err("Cannot process L3VNI %u Del - Could not find default BGP instance",
4129 /* unimport remote routes from VRF, if it is AUTO vrf bgp_delete will
4130 * take care of uninstalling the routes from zebra */
4131 if (!CHECK_FLAG(bgp_vrf
->vrf_flags
, BGP_VRF_AUTO
))
4132 uninstall_routes_for_vrf(bgp_vrf
);
4134 /* delete/withdraw all type-5 routes */
4135 delete_withdraw_vrf_routes(bgp_vrf
);
4137 /* remove the l3vni from vrf instance */
4140 /* remove the Rmac from the BGP vrf */
4141 memset(&bgp_vrf
->rmac
, 0, sizeof(struct ethaddr
));
4144 if (bgp_vrf
->vrf_import_rtl
&& !list_isempty(bgp_vrf
->vrf_import_rtl
)) {
4145 bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf
);
4146 list_delete_all_node(bgp_vrf
->vrf_import_rtl
);
4148 if (bgp_vrf
->vrf_export_rtl
&& !list_isempty(bgp_vrf
->vrf_export_rtl
)) {
4149 list_delete_all_node(bgp_vrf
->vrf_export_rtl
);
4152 /* update all corresponding local mac-ip routes */
4153 for (ALL_LIST_ELEMENTS_RO(bgp_vrf
->l2vnis
, node
, vpn
))
4154 update_routes_for_vni(bgp_def
, vpn
);
4157 /* Delete the instance if it was autocreated */
4158 if (CHECK_FLAG(bgp_vrf
->vrf_flags
, BGP_VRF_AUTO
))
4159 bgp_delete(bgp_vrf
);
4165 * Handle del of a local VNI.
4167 int bgp_evpn_local_vni_del(struct bgp
*bgp
, vni_t vni
)
4169 struct bgpevpn
*vpn
;
4171 if (!bgp
->vnihash
) {
4172 zlog_err("%u: VNI hash not created", bgp
->vrf_id
);
4176 /* Locate VNI hash */
4177 vpn
= bgp_evpn_lookup_vni(bgp
, vni
);
4179 zlog_warn("%u: VNI hash entry for VNI %u not found at DEL",
4184 /* Remove all local EVPN routes and schedule for processing (to
4185 * withdraw from peers).
4187 delete_routes_for_vni(bgp
, vpn
);
4190 * tunnel is no longer active, del tunnel ip address from tip_hash
4192 bgp_tip_del(bgp
, &vpn
->originator_ip
);
4194 /* Clear "live" flag and see if hash needs to be freed. */
4195 UNSET_FLAG(vpn
->flags
, VNI_FLAG_LIVE
);
4196 if (!is_vni_configured(vpn
))
4197 bgp_evpn_free(bgp
, vpn
);
4203 * Handle add (or update) of a local VNI. The only VNI change we care
4204 * about is change to local-tunnel-ip.
4206 int bgp_evpn_local_vni_add(struct bgp
*bgp
, vni_t vni
,
4207 struct in_addr originator_ip
,
4208 vrf_id_t tenant_vrf_id
)
4210 struct bgpevpn
*vpn
;
4211 struct prefix_evpn p
;
4213 if (!bgp
->vnihash
) {
4214 zlog_err("%u: VNI hash not created", bgp
->vrf_id
);
4218 /* Lookup VNI. If present and no change, exit. */
4219 vpn
= bgp_evpn_lookup_vni(bgp
, vni
);
4222 /* update tenant_vrf_id if required */
4223 if (vpn
->tenant_vrf_id
!= tenant_vrf_id
) {
4224 bgpevpn_unlink_from_l3vni(vpn
);
4225 vpn
->tenant_vrf_id
= tenant_vrf_id
;
4226 bgpevpn_link_to_l3vni(vpn
);
4228 /* update all routes with new export RT for VRFs */
4229 update_routes_for_vni(bgp
, vpn
);
4232 if (is_vni_live(vpn
)
4233 && IPV4_ADDR_SAME(&vpn
->originator_ip
, &originator_ip
))
4234 /* Probably some other param has changed that we don't
4238 /* Local tunnel endpoint IP address has changed */
4239 handle_tunnel_ip_change(bgp
, vpn
, originator_ip
);
4242 /* Create or update as appropriate. */
4244 vpn
= bgp_evpn_new(bgp
, vni
, originator_ip
, tenant_vrf_id
);
4247 "%u: Failed to allocate VNI entry for VNI %u - at Add",
4253 /* if the VNI is live already, there is nothing more to do */
4254 if (is_vni_live(vpn
))
4257 /* Mark as "live" */
4258 SET_FLAG(vpn
->flags
, VNI_FLAG_LIVE
);
4260 /* tunnel is now active, add tunnel-ip to db */
4261 bgp_tip_add(bgp
, &originator_ip
);
4263 /* filter routes as nexthop database has changed */
4264 bgp_filter_evpn_routes_upon_martian_nh_change(bgp
);
4266 /* Create EVPN type-3 route and schedule for processing. */
4267 build_evpn_type3_prefix(&p
, vpn
->originator_ip
);
4268 if (update_evpn_route(bgp
, vpn
, &p
, 0)) {
4269 zlog_err("%u: Type3 route creation failure for VNI %u",
4274 /* If we have learnt and retained remote routes (VTEPs, MACs) for this
4278 install_routes_for_vni(bgp
, vpn
);
4280 /* If we are advertising gateway mac-ip
4281 It needs to be conveyed again to zebra */
4282 bgp_zebra_advertise_gw_macip(bgp
, vpn
->advertise_gw_macip
, vpn
->vni
);
4288 * Cleanup EVPN information on disable - Need to delete and withdraw
4289 * EVPN routes from peers.
4291 void bgp_evpn_cleanup_on_disable(struct bgp
*bgp
)
4293 hash_iterate(bgp
->vnihash
, (void (*)(struct hash_backet
*,
4294 void *))cleanup_vni_on_disable
,
4299 * Cleanup EVPN information - invoked at the time of bgpd exit or when the
4300 * BGP instance (default) is being freed.
4302 void bgp_evpn_cleanup(struct bgp
*bgp
)
4305 hash_iterate(bgp
->vnihash
, (void (*)(struct hash_backet
*,
4306 void *))free_vni_entry
,
4308 if (bgp
->import_rt_hash
)
4309 hash_free(bgp
->import_rt_hash
);
4310 bgp
->import_rt_hash
= NULL
;
4311 if (bgp
->vrf_import_rt_hash
)
4312 hash_free(bgp
->vrf_import_rt_hash
);
4313 bgp
->vrf_import_rt_hash
= NULL
;
4315 hash_free(bgp
->vnihash
);
4316 bgp
->vnihash
= NULL
;
4317 if (bgp
->vrf_import_rtl
)
4318 list_delete_and_null(&bgp
->vrf_import_rtl
);
4319 bgp
->vrf_import_rtl
= NULL
;
4320 if (bgp
->vrf_export_rtl
)
4321 list_delete_and_null(&bgp
->vrf_export_rtl
);
4322 bgp
->vrf_export_rtl
= NULL
;
4324 list_delete_and_null(&bgp
->l2vnis
);
4326 bf_release_index(bm
->rd_idspace
, bgp
->vrf_rd_id
);
4330 * Initialization for EVPN
4333 * hash for RT to VNI
4334 * assign a unique rd id for auto derivation of vrf_prd
4336 void bgp_evpn_init(struct bgp
*bgp
)
4339 hash_create(vni_hash_key_make
, vni_hash_cmp
, "BGP VNI Hash");
4340 bgp
->import_rt_hash
=
4341 hash_create(import_rt_hash_key_make
, import_rt_hash_cmp
,
4342 "BGP Import RT Hash");
4343 bgp
->vrf_import_rt_hash
=
4344 hash_create(vrf_import_rt_hash_key_make
, vrf_import_rt_hash_cmp
,
4345 "BGP VRF Import RT Hash");
4346 bgp
->vrf_import_rtl
= list_new();
4347 bgp
->vrf_import_rtl
->cmp
=
4348 (int (*)(void *, void *))evpn_route_target_cmp
;
4350 bgp
->vrf_export_rtl
= list_new();
4351 bgp
->vrf_export_rtl
->cmp
=
4352 (int (*)(void *, void *))evpn_route_target_cmp
;
4353 bgp
->l2vnis
= list_new();
4355 (int (*)(void *, void *))vni_hash_cmp
;
4356 bf_assign_index(bm
->rd_idspace
, bgp
->vrf_rd_id
);
4360 void bgp_evpn_vrf_delete(struct bgp
*bgp_vrf
)
4362 bgp_evpn_unmap_vrf_from_its_rts(bgp_vrf
);