2 * Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org>
4 * This file is part of GNU Zebra.
6 * GNU Zebra is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
11 * GNU Zebra is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; see the file COPYING; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
34 #include "bgpd/bgpd.h"
35 #include "bgpd/bgp_debug.h"
36 #include "bgpd/bgp_errors.h"
37 #include "bgpd/bgp_table.h"
38 #include "bgpd/bgp_route.h"
39 #include "bgpd/bgp_attr.h"
40 #include "bgpd/bgp_label.h"
41 #include "bgpd/bgp_mplsvpn.h"
42 #include "bgpd/bgp_packet.h"
43 #include "bgpd/bgp_vty.h"
44 #include "bgpd/bgp_vpn.h"
45 #include "bgpd/bgp_community.h"
46 #include "bgpd/bgp_ecommunity.h"
47 #include "bgpd/bgp_zebra.h"
48 #include "bgpd/bgp_nexthop.h"
49 #include "bgpd/bgp_nht.h"
50 #include "bgpd/bgp_evpn.h"
51 #include "bgpd/bgp_memory.h"
54 #include "bgpd/rfapi/rfapi_backend.h"
58 * Definitions and external declarations.
60 extern struct zclient
*zclient
;
62 extern int argv_find_and_parse_vpnvx(struct cmd_token
**argv
, int argc
,
63 int *index
, afi_t
*afi
)
66 if (argv_find(argv
, argc
, "vpnv4", index
)) {
70 } else if (argv_find(argv
, argc
, "vpnv6", index
)) {
78 uint32_t decode_label(mpls_label_t
*label_pnt
)
81 uint8_t *pnt
= (uint8_t *)label_pnt
;
83 l
= ((uint32_t)*pnt
++ << 12);
84 l
|= (uint32_t)*pnt
++ << 4;
85 l
|= (uint32_t)((*pnt
& 0xf0) >> 4);
89 void encode_label(mpls_label_t label
, mpls_label_t
*label_pnt
)
91 uint8_t *pnt
= (uint8_t *)label_pnt
;
94 if (label
== BGP_PREVENT_VRF_2_VRF_LEAK
) {
98 *pnt
++ = (label
>> 12) & 0xff;
99 *pnt
++ = (label
>> 4) & 0xff;
100 *pnt
++ = ((label
<< 4) + 1) & 0xff; /* S=1 */
103 int bgp_nlri_parse_vpn(struct peer
*peer
, struct attr
*attr
,
104 struct bgp_nlri
*packet
)
112 struct prefix_rd prd
= {0};
113 mpls_label_t label
= {0};
116 bool addpath_capable
;
121 prd
.family
= AF_UNSPEC
;
124 struct stream
*data
= stream_new(packet
->length
);
125 stream_put(data
, packet
->nlri
, packet
->length
);
130 addpath_capable
= bgp_addpath_encode_rx(peer
, afi
, safi
);
132 #define VPN_PREFIXLEN_MIN_BYTES (3 + 8) /* label + RD */
133 while (STREAM_READABLE(data
) > 0) {
134 /* Clear prefix structure. */
135 memset(&p
, 0, sizeof(p
));
137 if (addpath_capable
) {
138 STREAM_GET(&addpath_id
, data
, BGP_ADDPATH_ID_LEN
);
139 addpath_id
= ntohl(addpath_id
);
142 if (STREAM_READABLE(data
) < 1) {
145 "%s [Error] Update packet error / VPN (truncated NLRI of size %u; no prefix length)",
146 peer
->host
, packet
->length
);
147 ret
= BGP_NLRI_PARSE_ERROR_PACKET_LENGTH
;
151 /* Fetch prefix length. */
152 STREAM_GETC(data
, prefixlen
);
153 p
.family
= afi2family(packet
->afi
);
154 psize
= PSIZE(prefixlen
);
156 if (prefixlen
< VPN_PREFIXLEN_MIN_BYTES
* 8) {
159 "%s [Error] Update packet error / VPN (prefix length %d less than VPN min length)",
160 peer
->host
, prefixlen
);
161 ret
= BGP_NLRI_PARSE_ERROR_PREFIX_LENGTH
;
165 /* sanity check against packet data */
166 if (STREAM_READABLE(data
) < psize
) {
169 "%s [Error] Update packet error / VPN (prefix length %d exceeds packet size %u)",
170 peer
->host
, prefixlen
, packet
->length
);
171 ret
= BGP_NLRI_PARSE_ERROR_PACKET_OVERFLOW
;
175 /* sanity check against storage for the IP address portion */
176 if ((psize
- VPN_PREFIXLEN_MIN_BYTES
) > (ssize_t
)sizeof(p
.u
)) {
179 "%s [Error] Update packet error / VPN (psize %d exceeds storage size %zu)",
181 prefixlen
- VPN_PREFIXLEN_MIN_BYTES
* 8,
183 ret
= BGP_NLRI_PARSE_ERROR_PACKET_LENGTH
;
187 /* Sanity check against max bitlen of the address family */
188 if ((psize
- VPN_PREFIXLEN_MIN_BYTES
) > prefix_blen(&p
)) {
191 "%s [Error] Update packet error / VPN (psize %d exceeds family (%u) max byte len %u)",
193 prefixlen
- VPN_PREFIXLEN_MIN_BYTES
* 8,
194 p
.family
, prefix_blen(&p
));
195 ret
= BGP_NLRI_PARSE_ERROR_PACKET_LENGTH
;
199 /* Copy label to prefix. */
200 if (STREAM_READABLE(data
) < BGP_LABEL_BYTES
) {
203 "%s [Error] Update packet error / VPN (truncated NLRI of size %u; no label)",
204 peer
->host
, packet
->length
);
205 ret
= BGP_NLRI_PARSE_ERROR_PACKET_LENGTH
;
209 STREAM_GET(&label
, data
, BGP_LABEL_BYTES
);
210 bgp_set_valid_label(&label
);
212 /* Copy routing distinguisher to rd. */
213 if (STREAM_READABLE(data
) < 8) {
216 "%s [Error] Update packet error / VPN (truncated NLRI of size %u; no RD)",
217 peer
->host
, packet
->length
);
218 ret
= BGP_NLRI_PARSE_ERROR_PACKET_LENGTH
;
221 STREAM_GET(&prd
.val
, data
, 8);
223 /* Decode RD type. */
224 type
= decode_rd_type(prd
.val
);
228 decode_rd_as(&prd
.val
[2], &rd_as
);
232 decode_rd_as4(&prd
.val
[2], &rd_as
);
236 decode_rd_ip(&prd
.val
[2], &rd_ip
);
239 #ifdef ENABLE_BGP_VNC
240 case RD_TYPE_VNC_ETH
:
245 flog_err(EC_BGP_UPDATE_RCV
, "Unknown RD type %d", type
);
246 break; /* just report */
249 /* exclude label & RD */
250 p
.prefixlen
= prefixlen
- VPN_PREFIXLEN_MIN_BYTES
* 8;
251 STREAM_GET(p
.u
.val
, data
, psize
- VPN_PREFIXLEN_MIN_BYTES
);
254 bgp_update(peer
, &p
, addpath_id
, attr
, packet
->afi
,
255 SAFI_MPLS_VPN
, ZEBRA_ROUTE_BGP
,
256 BGP_ROUTE_NORMAL
, &prd
, &label
, 1, 0, NULL
);
258 bgp_withdraw(peer
, &p
, addpath_id
, attr
, packet
->afi
,
259 SAFI_MPLS_VPN
, ZEBRA_ROUTE_BGP
,
260 BGP_ROUTE_NORMAL
, &prd
, &label
, 1, NULL
);
263 /* Packet length consistency check. */
264 if (STREAM_READABLE(data
) != 0) {
267 "%s [Error] Update packet error / VPN (%zu data remaining after parsing)",
268 peer
->host
, STREAM_READABLE(data
));
269 return BGP_NLRI_PARSE_ERROR_PACKET_LENGTH
;
277 "%s [Error] Update packet error / VPN (NLRI of size %u - length error)",
278 peer
->host
, packet
->length
);
279 ret
= BGP_NLRI_PARSE_ERROR_PACKET_LENGTH
;
285 #undef VPN_PREFIXLEN_MIN_BYTES
289 * This function informs zebra of the label this vrf sets on routes
290 * leaked to VPN. Zebra should install this label in the kernel with
291 * an action of "pop label and then use this vrf's IP FIB to route the PDU."
293 * Sending this vrf-label association is qualified by a) whether vrf->vpn
294 * exporting is active ("export vpn" is enabled, vpn-policy RD and RT list
295 * are set) and b) whether vpn-policy label is set.
297 * If any of these conditions do not hold, then we send MPLS_LABEL_NONE
298 * for this vrf, which zebra interprets to mean "delete this vrf-label
301 void vpn_leak_zebra_vrf_label_update(struct bgp
*bgp
, afi_t afi
)
303 mpls_label_t label
= MPLS_LABEL_NONE
;
304 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_LABEL
);
306 if (bgp
->vrf_id
== VRF_UNKNOWN
) {
309 "%s: vrf %s: afi %s: vrf_id not set, can't set zebra vrf label",
310 __func__
, bgp
->name_pretty
, afi2str(afi
));
315 if (vpn_leak_to_vpn_active(bgp
, afi
, NULL
)) {
316 label
= bgp
->vpn_policy
[afi
].tovpn_label
;
320 zlog_debug("%s: vrf %s: afi %s: setting label %d for vrf id %d",
321 __func__
, bgp
->name_pretty
, afi2str(afi
), label
,
325 if (label
== BGP_PREVENT_VRF_2_VRF_LEAK
)
326 label
= MPLS_LABEL_NONE
;
327 zclient_send_vrf_label(zclient
, bgp
->vrf_id
, afi
, label
, ZEBRA_LSP_BGP
);
328 bgp
->vpn_policy
[afi
].tovpn_zebra_vrf_label_last_sent
= label
;
332 * If zebra tells us vrf has become unconfigured, tell zebra not to
333 * use this label to forward to the vrf anymore
335 void vpn_leak_zebra_vrf_label_withdraw(struct bgp
*bgp
, afi_t afi
)
337 mpls_label_t label
= MPLS_LABEL_NONE
;
338 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_LABEL
);
340 if (bgp
->vrf_id
== VRF_UNKNOWN
) {
343 "%s: vrf_id not set, can't delete zebra vrf label",
350 zlog_debug("%s: deleting label for vrf %s (id=%d)", __func__
,
351 bgp
->name_pretty
, bgp
->vrf_id
);
354 zclient_send_vrf_label(zclient
, bgp
->vrf_id
, afi
, label
, ZEBRA_LSP_BGP
);
355 bgp
->vpn_policy
[afi
].tovpn_zebra_vrf_label_last_sent
= label
;
359 * This function informs zebra of the srv6-function this vrf sets on routes
360 * leaked to VPN. Zebra should install this srv6-function in the kernel with
361 * an action of "End.DT4/6's IP FIB to route the PDU."
363 void vpn_leak_zebra_vrf_sid_update_per_af(struct bgp
*bgp
, afi_t afi
)
365 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_LABEL
);
366 enum seg6local_action_t act
;
367 struct seg6local_context ctx
= {};
368 struct in6_addr
*tovpn_sid
= NULL
;
369 struct in6_addr
*tovpn_sid_ls
= NULL
;
372 if (bgp
->vrf_id
== VRF_UNKNOWN
) {
374 zlog_debug("%s: vrf %s: afi %s: vrf_id not set, can't set zebra vrf label",
375 __func__
, bgp
->name_pretty
, afi2str(afi
));
379 tovpn_sid
= bgp
->vpn_policy
[afi
].tovpn_sid
;
382 zlog_debug("%s: vrf %s: afi %s: sid not set", __func__
,
383 bgp
->name_pretty
, afi2str(afi
));
388 zlog_debug("%s: vrf %s: afi %s: setting sid %pI6 for vrf id %d",
389 __func__
, bgp
->name_pretty
, afi2str(afi
), tovpn_sid
,
392 vrf
= vrf_lookup_by_id(bgp
->vrf_id
);
396 ctx
.table
= vrf
->data
.l
.table_id
;
397 act
= afi
== AFI_IP
? ZEBRA_SEG6_LOCAL_ACTION_END_DT4
398 : ZEBRA_SEG6_LOCAL_ACTION_END_DT6
;
399 zclient_send_localsid(zclient
, tovpn_sid
, bgp
->vrf_id
, act
, &ctx
);
401 tovpn_sid_ls
= XCALLOC(MTYPE_BGP_SRV6_SID
, sizeof(struct in6_addr
));
402 *tovpn_sid_ls
= *tovpn_sid
;
403 bgp
->vpn_policy
[afi
].tovpn_zebra_vrf_sid_last_sent
= tovpn_sid_ls
;
407 * This function informs zebra of the srv6-function this vrf sets on routes
408 * leaked to VPN. Zebra should install this srv6-function in the kernel with
409 * an action of "End.DT46's IP FIB to route the PDU."
411 void vpn_leak_zebra_vrf_sid_update_per_vrf(struct bgp
*bgp
)
413 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_LABEL
);
414 enum seg6local_action_t act
;
415 struct seg6local_context ctx
= {};
416 struct in6_addr
*tovpn_sid
= NULL
;
417 struct in6_addr
*tovpn_sid_ls
= NULL
;
420 if (bgp
->vrf_id
== VRF_UNKNOWN
) {
423 "%s: vrf %s: vrf_id not set, can't set zebra vrf label",
424 __func__
, bgp
->name_pretty
);
428 tovpn_sid
= bgp
->tovpn_sid
;
431 zlog_debug("%s: vrf %s: sid not set", __func__
,
437 zlog_debug("%s: vrf %s: setting sid %pI6 for vrf id %d",
438 __func__
, bgp
->name_pretty
, tovpn_sid
, bgp
->vrf_id
);
440 vrf
= vrf_lookup_by_id(bgp
->vrf_id
);
444 ctx
.table
= vrf
->data
.l
.table_id
;
445 act
= ZEBRA_SEG6_LOCAL_ACTION_END_DT46
;
446 zclient_send_localsid(zclient
, tovpn_sid
, bgp
->vrf_id
, act
, &ctx
);
448 tovpn_sid_ls
= XCALLOC(MTYPE_BGP_SRV6_SID
, sizeof(struct in6_addr
));
449 *tovpn_sid_ls
= *tovpn_sid
;
450 bgp
->tovpn_zebra_vrf_sid_last_sent
= tovpn_sid_ls
;
454 * This function informs zebra of the srv6-function this vrf sets on routes
455 * leaked to VPN. Zebra should install this srv6-function in the kernel with
456 * an action of "End.DT4/6/46's IP FIB to route the PDU."
458 void vpn_leak_zebra_vrf_sid_update(struct bgp
*bgp
, afi_t afi
)
460 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_LABEL
);
462 if (bgp
->vpn_policy
[afi
].tovpn_sid
)
463 return vpn_leak_zebra_vrf_sid_update_per_af(bgp
, afi
);
466 return vpn_leak_zebra_vrf_sid_update_per_vrf(bgp
);
469 zlog_debug("%s: vrf %s: afi %s: sid not set", __func__
,
470 bgp
->name_pretty
, afi2str(afi
));
474 * If zebra tells us vrf has become unconfigured, tell zebra not to
475 * use this srv6-function to forward to the vrf anymore
477 void vpn_leak_zebra_vrf_sid_withdraw_per_af(struct bgp
*bgp
, afi_t afi
)
479 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_LABEL
);
481 if (bgp
->vrf_id
== VRF_UNKNOWN
) {
483 zlog_debug("%s: vrf %s: afi %s: vrf_id not set, can't set zebra vrf label",
484 __func__
, bgp
->name_pretty
, afi2str(afi
));
489 zlog_debug("%s: deleting sid for vrf %s afi (id=%d)", __func__
,
490 bgp
->name_pretty
, bgp
->vrf_id
);
492 zclient_send_localsid(zclient
,
493 bgp
->vpn_policy
[afi
].tovpn_zebra_vrf_sid_last_sent
,
494 bgp
->vrf_id
, ZEBRA_SEG6_LOCAL_ACTION_UNSPEC
, NULL
);
495 XFREE(MTYPE_BGP_SRV6_SID
,
496 bgp
->vpn_policy
[afi
].tovpn_zebra_vrf_sid_last_sent
);
500 * If zebra tells us vrf has become unconfigured, tell zebra not to
501 * use this srv6-function to forward to the vrf anymore
503 void vpn_leak_zebra_vrf_sid_withdraw_per_vrf(struct bgp
*bgp
)
505 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_LABEL
);
507 if (bgp
->vrf_id
== VRF_UNKNOWN
) {
510 "%s: vrf %s: vrf_id not set, can't set zebra vrf label",
511 __func__
, bgp
->name_pretty
);
516 zlog_debug("%s: deleting sid for vrf %s (id=%d)", __func__
,
517 bgp
->name_pretty
, bgp
->vrf_id
);
519 zclient_send_localsid(zclient
, bgp
->tovpn_zebra_vrf_sid_last_sent
,
520 bgp
->vrf_id
, ZEBRA_SEG6_LOCAL_ACTION_UNSPEC
,
522 XFREE(MTYPE_BGP_SRV6_SID
, bgp
->tovpn_zebra_vrf_sid_last_sent
);
526 * If zebra tells us vrf has become unconfigured, tell zebra not to
527 * use this srv6-function to forward to the vrf anymore
529 void vpn_leak_zebra_vrf_sid_withdraw(struct bgp
*bgp
, afi_t afi
)
531 if (bgp
->vpn_policy
[afi
].tovpn_zebra_vrf_sid_last_sent
)
532 vpn_leak_zebra_vrf_sid_withdraw_per_af(bgp
, afi
);
534 if (bgp
->tovpn_zebra_vrf_sid_last_sent
)
535 vpn_leak_zebra_vrf_sid_withdraw_per_vrf(bgp
);
538 int vpn_leak_label_callback(
543 struct vpn_policy
*vp
= (struct vpn_policy
*)labelid
;
544 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_LABEL
);
547 zlog_debug("%s: label=%u, allocated=%d",
548 __func__
, label
, allocated
);
552 * previously-allocated label is now invalid
554 if (CHECK_FLAG(vp
->flags
, BGP_VPN_POLICY_TOVPN_LABEL_AUTO
) &&
555 (vp
->tovpn_label
!= MPLS_LABEL_NONE
)) {
557 vpn_leak_prechange(BGP_VPN_POLICY_DIR_TOVPN
,
558 vp
->afi
, bgp_get_default(), vp
->bgp
);
559 vp
->tovpn_label
= MPLS_LABEL_NONE
;
560 vpn_leak_postchange(BGP_VPN_POLICY_DIR_TOVPN
,
561 vp
->afi
, bgp_get_default(), vp
->bgp
);
567 * New label allocation
569 if (!CHECK_FLAG(vp
->flags
, BGP_VPN_POLICY_TOVPN_LABEL_AUTO
)) {
572 * not currently configured for auto label, reject allocation
577 if (vp
->tovpn_label
!= MPLS_LABEL_NONE
) {
578 if (label
== vp
->tovpn_label
) {
579 /* already have same label, accept but do nothing */
582 /* Shouldn't happen: different label allocation */
583 flog_err(EC_BGP_LABEL
,
584 "%s: %s had label %u but got new assignment %u",
585 __func__
, vp
->bgp
->name_pretty
, vp
->tovpn_label
,
590 vpn_leak_prechange(BGP_VPN_POLICY_DIR_TOVPN
,
591 vp
->afi
, bgp_get_default(), vp
->bgp
);
592 vp
->tovpn_label
= label
;
593 vpn_leak_postchange(BGP_VPN_POLICY_DIR_TOVPN
,
594 vp
->afi
, bgp_get_default(), vp
->bgp
);
599 static void sid_register(struct bgp
*bgp
, const struct in6_addr
*sid
,
600 const char *locator_name
)
602 struct bgp_srv6_function
*func
;
603 func
= XCALLOC(MTYPE_BGP_SRV6_FUNCTION
,
604 sizeof(struct bgp_srv6_function
));
606 snprintf(func
->locator_name
, sizeof(func
->locator_name
),
608 listnode_add(bgp
->srv6_functions
, func
);
611 static void sid_unregister(struct bgp
*bgp
, const struct in6_addr
*sid
)
613 struct listnode
*node
, *nnode
;
614 struct bgp_srv6_function
*func
;
616 for (ALL_LIST_ELEMENTS(bgp
->srv6_functions
, node
, nnode
, func
))
617 if (sid_same(&func
->sid
, sid
)) {
618 listnode_delete(bgp
->srv6_functions
, func
);
619 XFREE(MTYPE_BGP_SRV6_FUNCTION
, func
);
623 static bool sid_exist(struct bgp
*bgp
, const struct in6_addr
*sid
)
625 struct listnode
*node
;
626 struct bgp_srv6_function
*func
;
628 for (ALL_LIST_ELEMENTS_RO(bgp
->srv6_functions
, node
, func
))
629 if (sid_same(&func
->sid
, sid
))
635 * This function generates a new SID based on bgp->srv6_locator_chunks and
636 * index. The locator and generated SID are stored in arguments sid_locator
637 * and sid, respectively.
639 * if index != 0: try to allocate as index-mode
640 * else: try to allocate as auto-mode
642 static uint32_t alloc_new_sid(struct bgp
*bgp
, uint32_t index
,
643 struct srv6_locator_chunk
*sid_locator_chunk
,
644 struct in6_addr
*sid
)
646 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_LABEL
);
647 struct listnode
*node
;
648 struct srv6_locator_chunk
*chunk
;
649 bool alloced
= false;
652 uint8_t func_len
= 0, shift_len
= 0;
653 uint32_t index_max
= 0;
655 if (!bgp
|| !sid_locator_chunk
|| !sid
)
658 for (ALL_LIST_ELEMENTS_RO(bgp
->srv6_locator_chunks
, node
, chunk
)) {
659 if (chunk
->function_bits_length
>
660 BGP_PREFIX_SID_SRV6_MAX_FUNCTION_LENGTH
) {
663 "%s: invalid SRv6 Locator chunk (%pFX): Function Length must be less or equal to %d",
664 __func__
, &chunk
->prefix
,
665 BGP_PREFIX_SID_SRV6_MAX_FUNCTION_LENGTH
);
669 index_max
= (1 << chunk
->function_bits_length
) - 1;
671 if (index
> index_max
) {
674 "%s: skipped SRv6 Locator chunk (%pFX): Function Length is too short to support specified index (%u)",
675 __func__
, &chunk
->prefix
, index
);
679 *sid
= chunk
->prefix
.prefix
;
680 *sid_locator_chunk
= *chunk
;
681 offset
= chunk
->block_bits_length
+ chunk
->node_bits_length
;
682 func_len
= chunk
->function_bits_length
;
683 shift_len
= BGP_PREFIX_SID_SRV6_MAX_FUNCTION_LENGTH
- func_len
;
686 label
= index
<< shift_len
;
687 if (label
< MPLS_LABEL_UNRESERVED_MIN
) {
690 "%s: skipped to allocate SRv6 SID (%pFX): Label (%u) is too small to use",
691 __func__
, &chunk
->prefix
,
696 transpose_sid(sid
, label
, offset
, func_len
);
697 if (sid_exist(bgp
, sid
))
703 for (uint32_t i
= 1; i
< index_max
; i
++) {
704 label
= i
<< shift_len
;
705 if (label
< MPLS_LABEL_UNRESERVED_MIN
) {
708 "%s: skipped to allocate SRv6 SID (%pFX): Label (%u) is too small to use",
709 __func__
, &chunk
->prefix
,
713 transpose_sid(sid
, label
, offset
, func_len
);
714 if (sid_exist(bgp
, sid
))
724 sid_register(bgp
, sid
, bgp
->srv6_locator_name
);
728 void ensure_vrf_tovpn_sid_per_af(struct bgp
*bgp_vpn
, struct bgp
*bgp_vrf
,
731 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
);
732 struct srv6_locator_chunk
*tovpn_sid_locator
;
733 struct in6_addr
*tovpn_sid
;
734 uint32_t tovpn_sid_index
= 0, tovpn_sid_transpose_label
;
735 bool tovpn_sid_auto
= false;
738 zlog_debug("%s: try to allocate new SID for vrf %s: afi %s",
739 __func__
, bgp_vrf
->name_pretty
, afi2str(afi
));
741 /* skip when tovpn sid is already allocated on vrf instance */
742 if (bgp_vrf
->vpn_policy
[afi
].tovpn_sid
)
746 * skip when bgp vpn instance ins't allocated
747 * or srv6 locator chunk isn't allocated
749 if (!bgp_vpn
|| !bgp_vpn
->srv6_locator_chunks
)
752 tovpn_sid_index
= bgp_vrf
->vpn_policy
[afi
].tovpn_sid_index
;
753 tovpn_sid_auto
= CHECK_FLAG(bgp_vrf
->vpn_policy
[afi
].flags
,
754 BGP_VPN_POLICY_TOVPN_SID_AUTO
);
756 /* skip when VPN isn't configured on vrf-instance */
757 if (tovpn_sid_index
== 0 && !tovpn_sid_auto
)
760 /* check invalid case both configured index and auto */
761 if (tovpn_sid_index
!= 0 && tovpn_sid_auto
) {
762 zlog_err("%s: index-mode and auto-mode both selected. ignored.",
767 tovpn_sid_locator
= srv6_locator_chunk_alloc();
768 tovpn_sid
= XCALLOC(MTYPE_BGP_SRV6_SID
, sizeof(struct in6_addr
));
770 tovpn_sid_transpose_label
= alloc_new_sid(bgp_vpn
, tovpn_sid_index
,
771 tovpn_sid_locator
, tovpn_sid
);
773 if (tovpn_sid_transpose_label
== 0) {
776 "%s: not allocated new sid for vrf %s: afi %s",
777 __func__
, bgp_vrf
->name_pretty
, afi2str(afi
));
778 srv6_locator_chunk_free(&tovpn_sid_locator
);
779 XFREE(MTYPE_BGP_SRV6_SID
, tovpn_sid
);
784 zlog_debug("%s: new sid %pI6 allocated for vrf %s: afi %s",
785 __func__
, tovpn_sid
, bgp_vrf
->name_pretty
,
788 bgp_vrf
->vpn_policy
[afi
].tovpn_sid
= tovpn_sid
;
789 bgp_vrf
->vpn_policy
[afi
].tovpn_sid_locator
= tovpn_sid_locator
;
790 bgp_vrf
->vpn_policy
[afi
].tovpn_sid_transpose_label
=
791 tovpn_sid_transpose_label
;
794 void ensure_vrf_tovpn_sid_per_vrf(struct bgp
*bgp_vpn
, struct bgp
*bgp_vrf
)
796 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
);
797 struct srv6_locator_chunk
*tovpn_sid_locator
;
798 struct in6_addr
*tovpn_sid
;
799 uint32_t tovpn_sid_index
= 0, tovpn_sid_transpose_label
;
800 bool tovpn_sid_auto
= false;
803 zlog_debug("%s: try to allocate new SID for vrf %s", __func__
,
804 bgp_vrf
->name_pretty
);
806 /* skip when tovpn sid is already allocated on vrf instance */
807 if (bgp_vrf
->tovpn_sid
)
811 * skip when bgp vpn instance ins't allocated
812 * or srv6 locator chunk isn't allocated
814 if (!bgp_vpn
|| !bgp_vpn
->srv6_locator_chunks
)
817 tovpn_sid_index
= bgp_vrf
->tovpn_sid_index
;
818 tovpn_sid_auto
= CHECK_FLAG(bgp_vrf
->vrf_flags
, BGP_VRF_TOVPN_SID_AUTO
);
820 /* skip when VPN isn't configured on vrf-instance */
821 if (tovpn_sid_index
== 0 && !tovpn_sid_auto
)
824 /* check invalid case both configured index and auto */
825 if (tovpn_sid_index
!= 0 && tovpn_sid_auto
) {
826 zlog_err("%s: index-mode and auto-mode both selected. ignored.",
831 tovpn_sid_locator
= srv6_locator_chunk_alloc();
832 tovpn_sid
= XCALLOC(MTYPE_BGP_SRV6_SID
, sizeof(struct in6_addr
));
834 tovpn_sid_transpose_label
= alloc_new_sid(bgp_vpn
, tovpn_sid_index
,
835 tovpn_sid_locator
, tovpn_sid
);
837 if (tovpn_sid_transpose_label
== 0) {
839 zlog_debug("%s: not allocated new sid for vrf %s",
840 __func__
, bgp_vrf
->name_pretty
);
841 srv6_locator_chunk_free(&tovpn_sid_locator
);
842 XFREE(MTYPE_BGP_SRV6_SID
, tovpn_sid
);
847 zlog_debug("%s: new sid %pI6 allocated for vrf %s", __func__
,
848 tovpn_sid
, bgp_vrf
->name_pretty
);
850 bgp_vrf
->tovpn_sid
= tovpn_sid
;
851 bgp_vrf
->tovpn_sid_locator
= tovpn_sid_locator
;
852 bgp_vrf
->tovpn_sid_transpose_label
= tovpn_sid_transpose_label
;
855 void ensure_vrf_tovpn_sid(struct bgp
*bgp_vpn
, struct bgp
*bgp_vrf
, afi_t afi
)
858 if (bgp_vrf
->vpn_policy
[afi
].tovpn_sid_index
!= 0 ||
859 CHECK_FLAG(bgp_vrf
->vpn_policy
[afi
].flags
,
860 BGP_VPN_POLICY_TOVPN_SID_AUTO
))
861 return ensure_vrf_tovpn_sid_per_af(bgp_vpn
, bgp_vrf
, afi
);
864 if (bgp_vrf
->tovpn_sid_index
!= 0 ||
865 CHECK_FLAG(bgp_vrf
->vrf_flags
, BGP_VRF_TOVPN_SID_AUTO
))
866 return ensure_vrf_tovpn_sid_per_vrf(bgp_vpn
, bgp_vrf
);
869 void delete_vrf_tovpn_sid_per_af(struct bgp
*bgp_vpn
, struct bgp
*bgp_vrf
,
872 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
);
873 uint32_t tovpn_sid_index
= 0;
874 bool tovpn_sid_auto
= false;
877 zlog_debug("%s: try to remove SID for vrf %s: afi %s", __func__
,
878 bgp_vrf
->name_pretty
, afi2str(afi
));
880 tovpn_sid_index
= bgp_vrf
->vpn_policy
[afi
].tovpn_sid_index
;
881 tovpn_sid_auto
= CHECK_FLAG(bgp_vrf
->vpn_policy
[afi
].flags
,
882 BGP_VPN_POLICY_TOVPN_SID_AUTO
);
884 /* skip when VPN is configured on vrf-instance */
885 if (tovpn_sid_index
!= 0 || tovpn_sid_auto
)
888 srv6_locator_chunk_free(&bgp_vrf
->vpn_policy
[afi
].tovpn_sid_locator
);
890 if (bgp_vrf
->vpn_policy
[afi
].tovpn_sid
) {
891 sid_unregister(bgp_vpn
, bgp_vrf
->vpn_policy
[afi
].tovpn_sid
);
892 XFREE(MTYPE_BGP_SRV6_SID
, bgp_vrf
->vpn_policy
[afi
].tovpn_sid
);
894 bgp_vrf
->vpn_policy
[afi
].tovpn_sid_transpose_label
= 0;
897 void delete_vrf_tovpn_sid_per_vrf(struct bgp
*bgp_vpn
, struct bgp
*bgp_vrf
)
899 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
);
900 uint32_t tovpn_sid_index
= 0;
901 bool tovpn_sid_auto
= false;
904 zlog_debug("%s: try to remove SID for vrf %s", __func__
,
905 bgp_vrf
->name_pretty
);
907 tovpn_sid_index
= bgp_vrf
->tovpn_sid_index
;
909 CHECK_FLAG(bgp_vrf
->vrf_flags
, BGP_VPN_POLICY_TOVPN_SID_AUTO
);
911 /* skip when VPN is configured on vrf-instance */
912 if (tovpn_sid_index
!= 0 || tovpn_sid_auto
)
915 srv6_locator_chunk_free(&bgp_vrf
->tovpn_sid_locator
);
917 if (bgp_vrf
->tovpn_sid
) {
918 sid_unregister(bgp_vpn
, bgp_vrf
->tovpn_sid
);
919 XFREE(MTYPE_BGP_SRV6_SID
, bgp_vrf
->tovpn_sid
);
921 bgp_vrf
->tovpn_sid_transpose_label
= 0;
924 void delete_vrf_tovpn_sid(struct bgp
*bgp_vpn
, struct bgp
*bgp_vrf
, afi_t afi
)
926 delete_vrf_tovpn_sid_per_af(bgp_vpn
, bgp_vrf
, afi
);
927 delete_vrf_tovpn_sid_per_vrf(bgp_vpn
, bgp_vrf
);
931 * This function embeds upper `len` bits of `label` in `sid`,
932 * starting at offset `offset` as seen from the MSB of `sid`.
934 * e.g. Given that `label` is 0x12345 and `len` is 16,
935 * then `label` will be embedded in `sid` as follows:
938 * label: 0001 0002 0003 0004 0005
939 * sid: .... 0001 0002 0003 0004
945 * e.g. Given that `label` is 0x12345 and `len` is 8,
946 * `label` will be embedded in `sid` as follows:
949 * label: 0001 0002 0003 0004 0005
950 * sid: .... 0001 0002 0000 0000
956 void transpose_sid(struct in6_addr
*sid
, uint32_t label
, uint8_t offset
,
959 for (uint8_t idx
= 0; idx
< len
; idx
++) {
960 uint8_t tidx
= offset
+ idx
;
961 sid
->s6_addr
[tidx
/ 8] &= ~(0x1 << (7 - tidx
% 8));
962 if (label
>> (19 - idx
) & 0x1)
963 sid
->s6_addr
[tidx
/ 8] |= 0x1 << (7 - tidx
% 8);
967 static bool labels_same(struct bgp_path_info
*bpi
, mpls_label_t
*label
,
979 if (n
!= bpi
->extra
->num_labels
)
982 for (i
= 0; i
< n
; ++i
) {
983 if (label
[i
] != bpi
->extra
->label
[i
])
990 * make encoded route labels match specified encoded label set
992 static void setlabels(struct bgp_path_info
*bpi
,
993 mpls_label_t
*label
, /* array of labels */
998 assert(num_labels
<= BGP_MAX_LABELS
);
1002 bpi
->extra
->num_labels
= 0;
1006 struct bgp_path_info_extra
*extra
= bgp_path_info_extra_get(bpi
);
1009 for (i
= 0; i
< num_labels
; ++i
) {
1010 extra
->label
[i
] = label
[i
];
1011 if (!bgp_is_valid_label(&label
[i
])) {
1012 bgp_set_valid_label(&extra
->label
[i
]);
1015 extra
->num_labels
= num_labels
;
1019 * make encoded route SIDs match specified encoded sid set
1021 static void setsids(struct bgp_path_info
*bpi
,
1022 struct in6_addr
*sid
,
1026 struct bgp_path_info_extra
*extra
;
1030 assert(num_sids
<= BGP_MAX_SIDS
);
1034 bpi
->extra
->num_sids
= 0;
1038 extra
= bgp_path_info_extra_get(bpi
);
1039 for (i
= 0; i
< num_sids
; i
++)
1040 memcpy(&extra
->sid
[i
].sid
, &sid
[i
], sizeof(struct in6_addr
));
1041 extra
->num_sids
= num_sids
;
1044 static void unsetsids(struct bgp_path_info
*bpi
)
1046 struct bgp_path_info_extra
*extra
;
1048 extra
= bgp_path_info_extra_get(bpi
);
1049 extra
->num_sids
= 0;
1050 memset(extra
->sid
, 0, sizeof(extra
->sid
));
1053 static bool leak_update_nexthop_valid(struct bgp
*to_bgp
, struct bgp_dest
*bn
,
1054 struct attr
*new_attr
, afi_t afi
,
1056 struct bgp_path_info
*source_bpi
,
1057 struct bgp_path_info
*bpi
,
1058 struct bgp
*bgp_orig
,
1059 const struct prefix
*p
, int debug
)
1061 struct bgp_path_info
*bpi_ultimate
;
1062 struct bgp
*bgp_nexthop
;
1065 bpi_ultimate
= bgp_get_imported_bpi_ultimate(source_bpi
);
1067 if (bpi
->extra
&& bpi
->extra
->bgp_orig
)
1068 bgp_nexthop
= bpi
->extra
->bgp_orig
;
1070 bgp_nexthop
= bgp_orig
;
1073 * No nexthop tracking for redistributed routes or for
1074 * EVPN-imported routes that get leaked.
1076 if (bpi_ultimate
->sub_type
== BGP_ROUTE_REDISTRIBUTE
||
1077 is_pi_family_evpn(bpi_ultimate
))
1081 * TBD do we need to do anything about the
1082 * 'connected' parameter?
1084 nh_valid
= bgp_find_or_add_nexthop(to_bgp
, bgp_nexthop
, afi
,
1085 safi
, bpi
, NULL
, 0, p
);
1088 * If you are using SRv6 VPN instead of MPLS, it need to check
1089 * the SID allocation. If the sid is not allocated, the rib
1092 if (to_bgp
->srv6_enabled
&&
1093 (!new_attr
->srv6_l3vpn
&& !new_attr
->srv6_vpn
)) {
1098 zlog_debug("%s: %pFX nexthop is %svalid (in vrf %s)", __func__
,
1099 p
, (nh_valid
? "" : "not "),
1100 bgp_nexthop
->name_pretty
);
1106 * returns pointer to new bgp_path_info upon success
1108 static struct bgp_path_info
*
1109 leak_update(struct bgp
*to_bgp
, struct bgp_dest
*bn
,
1110 struct attr
*new_attr
, /* already interned */
1111 afi_t afi
, safi_t safi
, struct bgp_path_info
*source_bpi
,
1112 mpls_label_t
*label
, uint32_t num_labels
, struct bgp
*bgp_orig
,
1113 struct prefix
*nexthop_orig
, int nexthop_self_flag
, int debug
)
1115 const struct prefix
*p
= bgp_dest_get_prefix(bn
);
1116 struct bgp_path_info
*bpi
;
1117 struct bgp_path_info
*new;
1118 struct bgp_path_info_extra
*extra
;
1119 uint32_t num_sids
= 0;
1120 void *parent
= source_bpi
;
1122 if (new_attr
->srv6_l3vpn
|| new_attr
->srv6_vpn
)
1127 "%s: entry: leak-to=%s, p=%pBD, type=%d, sub_type=%d",
1128 __func__
, to_bgp
->name_pretty
, bn
, source_bpi
->type
,
1129 source_bpi
->sub_type
);
1132 * Routes that are redistributed into BGP from zebra do not get
1133 * nexthop tracking. However, if those routes are subsequently
1134 * imported to other RIBs within BGP, the leaked routes do not
1135 * carry the original BGP_ROUTE_REDISTRIBUTE sub_type. Therefore,
1136 * in order to determine if the route we are currently leaking
1137 * should have nexthop tracking, we must find the ultimate
1138 * parent so we can check its sub_type.
1140 * As of now, source_bpi may at most be a second-generation route
1141 * (only one hop back to ultimate parent for vrf-vpn-vrf scheme).
1142 * Using a loop here supports more complex intra-bgp import-export
1143 * schemes that could be implemented in the future.
1150 for (bpi
= bgp_dest_get_bgp_path_info(bn
); bpi
; bpi
= bpi
->next
) {
1151 if (bpi
->extra
&& bpi
->extra
->parent
== parent
)
1156 bool labelssame
= labels_same(bpi
, label
, num_labels
);
1158 if (CHECK_FLAG(source_bpi
->flags
, BGP_PATH_REMOVED
)
1159 && CHECK_FLAG(bpi
->flags
, BGP_PATH_REMOVED
)) {
1162 "%s: ->%s(s_flags: 0x%x b_flags: 0x%x): %pFX: Found route, being removed, not leaking",
1163 __func__
, to_bgp
->name_pretty
,
1164 source_bpi
->flags
, bpi
->flags
, p
);
1169 if (attrhash_cmp(bpi
->attr
, new_attr
) && labelssame
1170 && !CHECK_FLAG(bpi
->flags
, BGP_PATH_REMOVED
)) {
1172 bgp_attr_unintern(&new_attr
);
1175 "%s: ->%s: %pBD: Found route, no change",
1176 __func__
, to_bgp
->name_pretty
, bn
);
1180 /* If the RT was changed via extended communities as an
1181 * import/export list, we should withdraw implicitly the old
1183 * For instance, RT list was modified using route-maps:
1184 * route-map test permit 10
1185 * set extcommunity rt none
1187 if (CHECK_FLAG(bpi
->attr
->flag
,
1188 ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES
)) &&
1189 CHECK_FLAG(new_attr
->flag
,
1190 ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES
))) {
1191 if (!ecommunity_cmp(
1192 bgp_attr_get_ecommunity(bpi
->attr
),
1193 bgp_attr_get_ecommunity(new_attr
))) {
1194 vpn_leak_to_vrf_withdraw(to_bgp
, bpi
);
1195 bgp_aggregate_decrement(to_bgp
, p
, bpi
, afi
,
1197 bgp_path_info_delete(bn
, bpi
);
1201 /* attr is changed */
1202 bgp_path_info_set_flag(bn
, bpi
, BGP_PATH_ATTR_CHANGED
);
1204 /* Rewrite BGP route information. */
1205 if (CHECK_FLAG(bpi
->flags
, BGP_PATH_REMOVED
))
1206 bgp_path_info_restore(bn
, bpi
);
1208 bgp_aggregate_decrement(to_bgp
, p
, bpi
, afi
, safi
);
1209 bgp_attr_unintern(&bpi
->attr
);
1210 bpi
->attr
= new_attr
;
1211 bpi
->uptime
= monotime(NULL
);
1217 setlabels(bpi
, label
, num_labels
);
1223 if (new_attr
->srv6_l3vpn
) {
1224 setsids(bpi
, &new_attr
->srv6_l3vpn
->sid
,
1227 extra
= bgp_path_info_extra_get(bpi
);
1229 extra
->sid
[0].loc_block_len
=
1230 new_attr
->srv6_l3vpn
->loc_block_len
;
1231 extra
->sid
[0].loc_node_len
=
1232 new_attr
->srv6_l3vpn
->loc_node_len
;
1233 extra
->sid
[0].func_len
=
1234 new_attr
->srv6_l3vpn
->func_len
;
1235 extra
->sid
[0].arg_len
=
1236 new_attr
->srv6_l3vpn
->arg_len
;
1237 extra
->sid
[0].transposition_len
=
1238 new_attr
->srv6_l3vpn
->transposition_len
;
1239 extra
->sid
[0].transposition_offset
=
1240 new_attr
->srv6_l3vpn
1241 ->transposition_offset
;
1242 } else if (new_attr
->srv6_vpn
)
1243 setsids(bpi
, &new_attr
->srv6_vpn
->sid
,
1248 if (nexthop_self_flag
)
1249 bgp_path_info_set_flag(bn
, bpi
, BGP_PATH_ANNC_NH_SELF
);
1251 if (CHECK_FLAG(source_bpi
->flags
, BGP_PATH_ACCEPT_OWN
))
1252 bgp_path_info_set_flag(bn
, bpi
, BGP_PATH_ACCEPT_OWN
);
1254 if (leak_update_nexthop_valid(to_bgp
, bn
, new_attr
, afi
, safi
,
1255 source_bpi
, bpi
, bgp_orig
, p
,
1257 bgp_path_info_set_flag(bn
, bpi
, BGP_PATH_VALID
);
1259 bgp_path_info_unset_flag(bn
, bpi
, BGP_PATH_VALID
);
1261 /* Process change. */
1262 bgp_aggregate_increment(to_bgp
, p
, bpi
, afi
, safi
);
1263 bgp_process(to_bgp
, bn
, afi
, safi
);
1264 bgp_dest_unlock_node(bn
);
1267 zlog_debug("%s: ->%s: %pBD Found route, changed attr",
1268 __func__
, to_bgp
->name_pretty
, bn
);
1273 if (CHECK_FLAG(source_bpi
->flags
, BGP_PATH_REMOVED
)) {
1276 "%s: ->%s(s_flags: 0x%x): %pFX: New route, being removed, not leaking",
1277 __func__
, to_bgp
->name_pretty
,
1278 source_bpi
->flags
, p
);
1283 new = info_make(ZEBRA_ROUTE_BGP
, BGP_ROUTE_IMPORTED
, 0,
1284 to_bgp
->peer_self
, new_attr
, bn
);
1286 if (source_bpi
->peer
) {
1287 extra
= bgp_path_info_extra_get(new);
1288 extra
->peer_orig
= peer_lock(source_bpi
->peer
);
1291 if (nexthop_self_flag
)
1292 bgp_path_info_set_flag(bn
, new, BGP_PATH_ANNC_NH_SELF
);
1294 if (CHECK_FLAG(source_bpi
->flags
, BGP_PATH_ACCEPT_OWN
))
1295 bgp_path_info_set_flag(bn
, new, BGP_PATH_ACCEPT_OWN
);
1297 bgp_path_info_extra_get(new);
1303 if (new_attr
->srv6_l3vpn
) {
1304 setsids(new, &new_attr
->srv6_l3vpn
->sid
, num_sids
);
1306 extra
= bgp_path_info_extra_get(new);
1308 extra
->sid
[0].loc_block_len
=
1309 new_attr
->srv6_l3vpn
->loc_block_len
;
1310 extra
->sid
[0].loc_node_len
=
1311 new_attr
->srv6_l3vpn
->loc_node_len
;
1312 extra
->sid
[0].func_len
= new_attr
->srv6_l3vpn
->func_len
;
1313 extra
->sid
[0].arg_len
= new_attr
->srv6_l3vpn
->arg_len
;
1314 extra
->sid
[0].transposition_len
=
1315 new_attr
->srv6_l3vpn
->transposition_len
;
1316 extra
->sid
[0].transposition_offset
=
1317 new_attr
->srv6_l3vpn
->transposition_offset
;
1318 } else if (new_attr
->srv6_vpn
)
1319 setsids(new, &new_attr
->srv6_vpn
->sid
, num_sids
);
1324 setlabels(new, label
, num_labels
);
1326 new->extra
->parent
= bgp_path_info_lock(parent
);
1328 (struct bgp_dest
*)((struct bgp_path_info
*)parent
)->net
);
1330 new->extra
->bgp_orig
= bgp_lock(bgp_orig
);
1332 new->extra
->nexthop_orig
= *nexthop_orig
;
1334 if (leak_update_nexthop_valid(to_bgp
, bn
, new_attr
, afi
, safi
,
1335 source_bpi
, new, bgp_orig
, p
, debug
))
1336 bgp_path_info_set_flag(bn
, new, BGP_PATH_VALID
);
1338 bgp_path_info_unset_flag(bn
, new, BGP_PATH_VALID
);
1340 bgp_aggregate_increment(to_bgp
, p
, new, afi
, safi
);
1341 bgp_path_info_add(bn
, new);
1343 bgp_dest_unlock_node(bn
);
1344 bgp_process(to_bgp
, bn
, afi
, safi
);
1347 zlog_debug("%s: ->%s: %pBD: Added new route", __func__
,
1348 to_bgp
->name_pretty
, bn
);
1353 /* cf vnc_import_bgp_add_route_mode_nvegroup() and add_vnc_route() */
1354 void vpn_leak_from_vrf_update(struct bgp
*to_bgp
, /* to */
1355 struct bgp
*from_bgp
, /* from */
1356 struct bgp_path_info
*path_vrf
) /* route */
1358 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
);
1359 const struct prefix
*p
= bgp_dest_get_prefix(path_vrf
->net
);
1360 afi_t afi
= family2afi(p
->family
);
1361 struct attr static_attr
= {0};
1362 struct attr
*new_attr
= NULL
;
1363 safi_t safi
= SAFI_MPLS_VPN
;
1364 mpls_label_t label_val
;
1366 struct bgp_dest
*bn
;
1367 const char *debugmsg
;
1368 int nexthop_self_flag
= 0;
1371 zlog_debug("%s: from vrf %s", __func__
, from_bgp
->name_pretty
);
1373 if (debug
&& bgp_attr_get_ecommunity(path_vrf
->attr
)) {
1374 char *s
= ecommunity_ecom2str(
1375 bgp_attr_get_ecommunity(path_vrf
->attr
),
1376 ECOMMUNITY_FORMAT_ROUTE_MAP
, 0);
1378 zlog_debug("%s: %s path_vrf->type=%d, EC{%s}", __func__
,
1379 from_bgp
->name
, path_vrf
->type
, s
);
1380 XFREE(MTYPE_ECOMMUNITY_STR
, s
);
1388 zlog_debug("%s: can't get afi of prefix", __func__
);
1392 /* Is this route exportable into the VPN table? */
1393 if (!is_route_injectable_into_vpn(path_vrf
))
1396 if (!vpn_leak_to_vpn_active(from_bgp
, afi
, &debugmsg
)) {
1398 zlog_debug("%s: %s skipping: %s", __func__
,
1399 from_bgp
->name
, debugmsg
);
1404 static_attr
= *path_vrf
->attr
;
1407 * route map handling
1409 if (from_bgp
->vpn_policy
[afi
].rmap
[BGP_VPN_POLICY_DIR_TOVPN
]) {
1410 struct bgp_path_info info
;
1411 route_map_result_t ret
;
1413 memset(&info
, 0, sizeof(info
));
1414 info
.peer
= to_bgp
->peer_self
;
1415 info
.attr
= &static_attr
;
1416 ret
= route_map_apply(from_bgp
->vpn_policy
[afi
]
1417 .rmap
[BGP_VPN_POLICY_DIR_TOVPN
],
1419 if (RMAP_DENYMATCH
== ret
) {
1420 bgp_attr_flush(&static_attr
); /* free any added parts */
1423 "%s: vrf %s route map \"%s\" says DENY, returning",
1424 __func__
, from_bgp
->name_pretty
,
1425 from_bgp
->vpn_policy
[afi
]
1426 .rmap
[BGP_VPN_POLICY_DIR_TOVPN
]
1432 if (debug
&& bgp_attr_get_ecommunity(&static_attr
)) {
1433 char *s
= ecommunity_ecom2str(
1434 bgp_attr_get_ecommunity(&static_attr
),
1435 ECOMMUNITY_FORMAT_ROUTE_MAP
, 0);
1437 zlog_debug("%s: post route map static_attr.ecommunity{%s}",
1439 XFREE(MTYPE_ECOMMUNITY_STR
, s
);
1443 * Add the vpn-policy rt-list
1445 struct ecommunity
*old_ecom
;
1446 struct ecommunity
*new_ecom
;
1448 /* Export with the 'from' instance's export RTs. */
1449 /* If doing VRF-to-VRF leaking, strip existing RTs first. */
1450 old_ecom
= bgp_attr_get_ecommunity(&static_attr
);
1452 new_ecom
= ecommunity_dup(old_ecom
);
1453 if (CHECK_FLAG(from_bgp
->af_flags
[afi
][SAFI_UNICAST
],
1454 BGP_CONFIG_VRF_TO_VRF_EXPORT
))
1455 ecommunity_strip_rts(new_ecom
);
1456 new_ecom
= ecommunity_merge(
1457 new_ecom
, from_bgp
->vpn_policy
[afi
]
1458 .rtlist
[BGP_VPN_POLICY_DIR_TOVPN
]);
1459 if (!old_ecom
->refcnt
)
1460 ecommunity_free(&old_ecom
);
1462 new_ecom
= ecommunity_dup(
1463 from_bgp
->vpn_policy
[afi
]
1464 .rtlist
[BGP_VPN_POLICY_DIR_TOVPN
]);
1466 bgp_attr_set_ecommunity(&static_attr
, new_ecom
);
1468 if (debug
&& bgp_attr_get_ecommunity(&static_attr
)) {
1469 char *s
= ecommunity_ecom2str(
1470 bgp_attr_get_ecommunity(&static_attr
),
1471 ECOMMUNITY_FORMAT_ROUTE_MAP
, 0);
1473 zlog_debug("%s: post merge static_attr.ecommunity{%s}",
1475 XFREE(MTYPE_ECOMMUNITY_STR
, s
);
1478 community_strip_accept_own(&static_attr
);
1481 /* if policy nexthop not set, use 0 */
1482 if (CHECK_FLAG(from_bgp
->vpn_policy
[afi
].flags
,
1483 BGP_VPN_POLICY_TOVPN_NEXTHOP_SET
)) {
1484 struct prefix
*nexthop
=
1485 &from_bgp
->vpn_policy
[afi
].tovpn_nexthop
;
1487 switch (nexthop
->family
) {
1489 /* prevent mp_nexthop_global_in <- self in bgp_route.c
1491 static_attr
.nexthop
.s_addr
= nexthop
->u
.prefix4
.s_addr
;
1493 static_attr
.mp_nexthop_global_in
= nexthop
->u
.prefix4
;
1494 static_attr
.mp_nexthop_len
= BGP_ATTR_NHLEN_IPV4
;
1498 static_attr
.mp_nexthop_global
= nexthop
->u
.prefix6
;
1499 static_attr
.mp_nexthop_len
= BGP_ATTR_NHLEN_IPV6_GLOBAL
;
1506 if (!CHECK_FLAG(from_bgp
->af_flags
[afi
][SAFI_UNICAST
],
1507 BGP_CONFIG_VRF_TO_VRF_EXPORT
)) {
1508 if (afi
== AFI_IP
) {
1510 * For ipv4, copy to multiprotocol
1513 static_attr
.mp_nexthop_global_in
=
1514 static_attr
.nexthop
;
1515 static_attr
.mp_nexthop_len
=
1516 BGP_ATTR_NHLEN_IPV4
;
1518 * XXX Leave static_attr.nexthop
1522 ~ATTR_FLAG_BIT(BGP_ATTR_NEXT_HOP
);
1525 /* Update based on next-hop family to account for
1526 * RFC 5549 (BGP unnumbered) scenario. Note that
1527 * specific action is only needed for the case of
1528 * IPv4 nexthops as the attr has been copied
1532 && !BGP_ATTR_NEXTHOP_AFI_IP6(path_vrf
->attr
)) {
1533 static_attr
.mp_nexthop_global_in
.s_addr
=
1534 static_attr
.nexthop
.s_addr
;
1535 static_attr
.mp_nexthop_len
=
1536 BGP_ATTR_NHLEN_IPV4
;
1538 ATTR_FLAG_BIT(BGP_ATTR_NEXT_HOP
);
1541 nexthop_self_flag
= 1;
1544 label_val
= from_bgp
->vpn_policy
[afi
].tovpn_label
;
1545 if (label_val
== MPLS_LABEL_NONE
) {
1546 encode_label(MPLS_LABEL_IMPLICIT_NULL
, &label
);
1548 encode_label(label_val
, &label
);
1551 /* Set originator ID to "me" */
1552 SET_FLAG(static_attr
.flag
, ATTR_FLAG_BIT(BGP_ATTR_ORIGINATOR_ID
));
1553 static_attr
.originator_id
= to_bgp
->router_id
;
1555 /* Set SID for SRv6 VPN */
1556 if (from_bgp
->vpn_policy
[afi
].tovpn_sid_locator
) {
1557 struct srv6_locator_chunk
*locator
=
1558 from_bgp
->vpn_policy
[afi
].tovpn_sid_locator
;
1560 from_bgp
->vpn_policy
[afi
].tovpn_sid_transpose_label
,
1562 static_attr
.srv6_l3vpn
= XCALLOC(MTYPE_BGP_SRV6_L3VPN
,
1563 sizeof(struct bgp_attr_srv6_l3vpn
));
1564 static_attr
.srv6_l3vpn
->sid_flags
= 0x00;
1565 static_attr
.srv6_l3vpn
->endpoint_behavior
=
1567 ? (CHECK_FLAG(locator
->flags
, SRV6_LOCATOR_USID
)
1568 ? SRV6_ENDPOINT_BEHAVIOR_END_DT4_USID
1569 : SRV6_ENDPOINT_BEHAVIOR_END_DT4
)
1570 : (CHECK_FLAG(locator
->flags
, SRV6_LOCATOR_USID
)
1571 ? SRV6_ENDPOINT_BEHAVIOR_END_DT6_USID
1572 : SRV6_ENDPOINT_BEHAVIOR_END_DT6
);
1573 static_attr
.srv6_l3vpn
->loc_block_len
=
1574 from_bgp
->vpn_policy
[afi
]
1575 .tovpn_sid_locator
->block_bits_length
;
1576 static_attr
.srv6_l3vpn
->loc_node_len
=
1577 from_bgp
->vpn_policy
[afi
]
1578 .tovpn_sid_locator
->node_bits_length
;
1579 static_attr
.srv6_l3vpn
->func_len
=
1580 from_bgp
->vpn_policy
[afi
]
1581 .tovpn_sid_locator
->function_bits_length
;
1582 static_attr
.srv6_l3vpn
->arg_len
=
1583 from_bgp
->vpn_policy
[afi
]
1584 .tovpn_sid_locator
->argument_bits_length
;
1585 static_attr
.srv6_l3vpn
->transposition_len
=
1586 from_bgp
->vpn_policy
[afi
]
1587 .tovpn_sid_locator
->function_bits_length
;
1588 static_attr
.srv6_l3vpn
->transposition_offset
=
1589 from_bgp
->vpn_policy
[afi
]
1590 .tovpn_sid_locator
->block_bits_length
+
1591 from_bgp
->vpn_policy
[afi
]
1592 .tovpn_sid_locator
->node_bits_length
;
1594 memcpy(&static_attr
.srv6_l3vpn
->sid
,
1595 &from_bgp
->vpn_policy
[afi
]
1596 .tovpn_sid_locator
->prefix
.prefix
,
1597 sizeof(struct in6_addr
));
1598 } else if (from_bgp
->tovpn_sid_locator
) {
1599 struct srv6_locator_chunk
*locator
=
1600 from_bgp
->tovpn_sid_locator
;
1601 encode_label(from_bgp
->tovpn_sid_transpose_label
, &label
);
1602 static_attr
.srv6_l3vpn
=
1603 XCALLOC(MTYPE_BGP_SRV6_L3VPN
,
1604 sizeof(struct bgp_attr_srv6_l3vpn
));
1605 static_attr
.srv6_l3vpn
->sid_flags
= 0x00;
1606 static_attr
.srv6_l3vpn
->endpoint_behavior
=
1607 CHECK_FLAG(locator
->flags
, SRV6_LOCATOR_USID
)
1608 ? SRV6_ENDPOINT_BEHAVIOR_END_DT46_USID
1609 : SRV6_ENDPOINT_BEHAVIOR_END_DT46
;
1610 static_attr
.srv6_l3vpn
->loc_block_len
=
1611 from_bgp
->tovpn_sid_locator
->block_bits_length
;
1612 static_attr
.srv6_l3vpn
->loc_node_len
=
1613 from_bgp
->tovpn_sid_locator
->node_bits_length
;
1614 static_attr
.srv6_l3vpn
->func_len
=
1615 from_bgp
->tovpn_sid_locator
->function_bits_length
;
1616 static_attr
.srv6_l3vpn
->arg_len
=
1617 from_bgp
->tovpn_sid_locator
->argument_bits_length
;
1618 static_attr
.srv6_l3vpn
->transposition_len
=
1619 from_bgp
->tovpn_sid_locator
->function_bits_length
;
1620 static_attr
.srv6_l3vpn
->transposition_offset
=
1621 from_bgp
->tovpn_sid_locator
->block_bits_length
+
1622 from_bgp
->tovpn_sid_locator
->node_bits_length
;
1623 memcpy(&static_attr
.srv6_l3vpn
->sid
,
1624 &from_bgp
->tovpn_sid_locator
->prefix
.prefix
,
1625 sizeof(struct in6_addr
));
1629 new_attr
= bgp_attr_intern(
1630 &static_attr
); /* hashed refcounted everything */
1631 bgp_attr_flush(&static_attr
); /* free locally-allocated parts */
1633 if (debug
&& bgp_attr_get_ecommunity(new_attr
)) {
1634 char *s
= ecommunity_ecom2str(bgp_attr_get_ecommunity(new_attr
),
1635 ECOMMUNITY_FORMAT_ROUTE_MAP
, 0);
1637 zlog_debug("%s: new_attr->ecommunity{%s}", __func__
, s
);
1638 XFREE(MTYPE_ECOMMUNITY_STR
, s
);
1641 /* Now new_attr is an allocated interned attr */
1643 bn
= bgp_afi_node_get(to_bgp
->rib
[afi
][safi
], afi
, safi
, p
,
1644 &(from_bgp
->vpn_policy
[afi
].tovpn_rd
));
1646 struct bgp_path_info
*new_info
;
1649 leak_update(to_bgp
, bn
, new_attr
, afi
, safi
, path_vrf
, &label
,
1650 1, from_bgp
, NULL
, nexthop_self_flag
, debug
);
1653 * Routes actually installed in the vpn RIB must also be
1654 * offered to all vrfs (because now they originate from
1657 * Acceptance into other vrfs depends on rt-lists.
1658 * Originating vrf will not accept the looped back route
1659 * because of loop checking.
1662 vpn_leak_to_vrf_update(from_bgp
, new_info
, NULL
);
1665 void vpn_leak_from_vrf_withdraw(struct bgp
*to_bgp
, /* to */
1666 struct bgp
*from_bgp
, /* from */
1667 struct bgp_path_info
*path_vrf
) /* route */
1669 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
);
1670 const struct prefix
*p
= bgp_dest_get_prefix(path_vrf
->net
);
1671 afi_t afi
= family2afi(p
->family
);
1672 safi_t safi
= SAFI_MPLS_VPN
;
1673 struct bgp_path_info
*bpi
;
1674 struct bgp_dest
*bn
;
1675 const char *debugmsg
;
1679 "%s: entry: leak-from=%s, p=%pBD, type=%d, sub_type=%d",
1680 __func__
, from_bgp
->name_pretty
, path_vrf
->net
,
1681 path_vrf
->type
, path_vrf
->sub_type
);
1689 zlog_debug("%s: can't get afi of prefix", __func__
);
1693 /* Is this route exportable into the VPN table? */
1694 if (!is_route_injectable_into_vpn(path_vrf
))
1697 if (!vpn_leak_to_vpn_active(from_bgp
, afi
, &debugmsg
)) {
1699 zlog_debug("%s: skipping: %s", __func__
, debugmsg
);
1704 zlog_debug("%s: withdrawing (path_vrf=%p)", __func__
, path_vrf
);
1706 bn
= bgp_afi_node_get(to_bgp
->rib
[afi
][safi
], afi
, safi
, p
,
1707 &(from_bgp
->vpn_policy
[afi
].tovpn_rd
));
1713 * match original bpi imported from
1715 for (bpi
= bgp_dest_get_bgp_path_info(bn
); bpi
; bpi
= bpi
->next
) {
1716 if (bpi
->extra
&& bpi
->extra
->parent
== path_vrf
) {
1722 /* withdraw from looped vrfs as well */
1723 vpn_leak_to_vrf_withdraw(to_bgp
, bpi
);
1725 bgp_aggregate_decrement(to_bgp
, p
, bpi
, afi
, safi
);
1726 bgp_path_info_delete(bn
, bpi
);
1727 bgp_process(to_bgp
, bn
, afi
, safi
);
1729 bgp_dest_unlock_node(bn
);
1732 void vpn_leak_from_vrf_withdraw_all(struct bgp
*to_bgp
, struct bgp
*from_bgp
,
1735 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
);
1736 struct bgp_dest
*pdest
;
1737 safi_t safi
= SAFI_MPLS_VPN
;
1740 * Walk vpn table, delete bpi with bgp_orig == from_bgp
1742 for (pdest
= bgp_table_top(to_bgp
->rib
[afi
][safi
]); pdest
;
1743 pdest
= bgp_route_next(pdest
)) {
1745 struct bgp_table
*table
;
1746 struct bgp_dest
*bn
;
1747 struct bgp_path_info
*bpi
;
1749 /* This is the per-RD table of prefixes */
1750 table
= bgp_dest_get_bgp_table_info(pdest
);
1755 for (bn
= bgp_table_top(table
); bn
; bn
= bgp_route_next(bn
)) {
1756 bpi
= bgp_dest_get_bgp_path_info(bn
);
1758 zlog_debug("%s: looking at prefix %pBD",
1762 for (; bpi
; bpi
= bpi
->next
) {
1764 zlog_debug("%s: type %d, sub_type %d",
1765 __func__
, bpi
->type
,
1767 if (bpi
->sub_type
!= BGP_ROUTE_IMPORTED
)
1771 if ((struct bgp
*)bpi
->extra
->bgp_orig
==
1775 zlog_debug("%s: deleting it",
1777 /* withdraw from leak-to vrfs as well */
1778 vpn_leak_to_vrf_withdraw(to_bgp
, bpi
);
1779 bgp_aggregate_decrement(
1780 to_bgp
, bgp_dest_get_prefix(bn
),
1782 bgp_path_info_delete(bn
, bpi
);
1783 bgp_process(to_bgp
, bn
, afi
, safi
);
1790 void vpn_leak_from_vrf_update_all(struct bgp
*to_bgp
, struct bgp
*from_bgp
,
1793 struct bgp_dest
*bn
;
1794 struct bgp_path_info
*bpi
;
1795 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
);
1798 zlog_debug("%s: entry, afi=%d, vrf=%s", __func__
, afi
,
1799 from_bgp
->name_pretty
);
1801 for (bn
= bgp_table_top(from_bgp
->rib
[afi
][SAFI_UNICAST
]); bn
;
1802 bn
= bgp_route_next(bn
)) {
1805 zlog_debug("%s: node=%p", __func__
, bn
);
1807 for (bpi
= bgp_dest_get_bgp_path_info(bn
); bpi
;
1811 "%s: calling vpn_leak_from_vrf_update",
1813 vpn_leak_from_vrf_update(to_bgp
, from_bgp
, bpi
);
1818 static struct bgp
*bgp_lookup_by_rd(struct bgp_path_info
*bpi
,
1819 struct prefix_rd
*rd
, afi_t afi
)
1821 struct listnode
*node
, *nnode
;
1827 /* If ACCEPT_OWN is not enabled for this path - return. */
1828 if (!CHECK_FLAG(bpi
->flags
, BGP_PATH_ACCEPT_OWN
))
1831 for (ALL_LIST_ELEMENTS(bm
->bgp
, node
, nnode
, bgp
)) {
1832 if (bgp
->inst_type
!= BGP_INSTANCE_TYPE_VRF
)
1835 if (!CHECK_FLAG(bgp
->vpn_policy
[afi
].flags
,
1836 BGP_VPN_POLICY_TOVPN_RD_SET
))
1839 /* Check if we have source VRF by RD value */
1840 if (memcmp(&bgp
->vpn_policy
[afi
].tovpn_rd
.val
, rd
->val
,
1841 ECOMMUNITY_SIZE
) == 0)
1848 static bool vpn_leak_to_vrf_update_onevrf(struct bgp
*to_bgp
, /* to */
1849 struct bgp
*from_bgp
, /* from */
1850 struct bgp_path_info
*path_vpn
,
1851 struct prefix_rd
*prd
)
1853 const struct prefix
*p
= bgp_dest_get_prefix(path_vpn
->net
);
1854 afi_t afi
= family2afi(p
->family
);
1856 struct attr static_attr
= {0};
1857 struct attr
*new_attr
= NULL
;
1858 struct bgp_dest
*bn
;
1859 safi_t safi
= SAFI_UNICAST
;
1860 const char *debugmsg
;
1861 struct prefix nexthop_orig
;
1862 mpls_label_t
*pLabels
= NULL
;
1863 uint32_t num_labels
= 0;
1864 int nexthop_self_flag
= 1;
1865 struct bgp_path_info
*bpi_ultimate
= NULL
;
1866 int origin_local
= 0;
1867 struct bgp
*src_vrf
;
1869 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
);
1871 if (!vpn_leak_from_vpn_active(to_bgp
, afi
, &debugmsg
)) {
1873 zlog_debug("%s: skipping: %s", __func__
, debugmsg
);
1877 /* Check for intersection of route targets */
1878 if (!ecommunity_include(
1879 to_bgp
->vpn_policy
[afi
].rtlist
[BGP_VPN_POLICY_DIR_FROMVPN
],
1880 bgp_attr_get_ecommunity(path_vpn
->attr
))) {
1883 "from vpn (%s) to vrf (%s), skipping after no intersection of route targets",
1884 from_bgp
->name_pretty
, to_bgp
->name_pretty
);
1888 /* A route MUST NOT ever be accepted back into its source VRF, even if
1889 * it carries one or more RTs that match that VRF.
1891 if (prd
&& memcmp(&prd
->val
, &to_bgp
->vpn_policy
[afi
].tovpn_rd
.val
,
1892 ECOMMUNITY_SIZE
) == 0) {
1895 "%s: skipping import, match RD (%pRD) of src VRF (%s) and the prefix (%pFX)",
1896 __func__
, prd
, to_bgp
->name_pretty
, p
);
1902 zlog_debug("%s: updating RD %pRD, %pFX to vrf %s", __func__
,
1903 prd
, p
, to_bgp
->name_pretty
);
1906 static_attr
= *path_vpn
->attr
;
1908 struct ecommunity
*old_ecom
;
1909 struct ecommunity
*new_ecom
;
1911 /* If doing VRF-to-VRF leaking, strip RTs. */
1912 old_ecom
= bgp_attr_get_ecommunity(&static_attr
);
1913 if (old_ecom
&& CHECK_FLAG(to_bgp
->af_flags
[afi
][safi
],
1914 BGP_CONFIG_VRF_TO_VRF_IMPORT
)) {
1915 new_ecom
= ecommunity_dup(old_ecom
);
1916 ecommunity_strip_rts(new_ecom
);
1917 bgp_attr_set_ecommunity(&static_attr
, new_ecom
);
1919 if (new_ecom
->size
== 0) {
1920 ecommunity_free(&new_ecom
);
1921 bgp_attr_set_ecommunity(&static_attr
, NULL
);
1924 if (!old_ecom
->refcnt
)
1925 ecommunity_free(&old_ecom
);
1928 community_strip_accept_own(&static_attr
);
1931 * Nexthop: stash and clear
1933 * Nexthop is valid in context of VPN core, but not in destination vrf.
1934 * Stash it for later label resolution by vrf ingress path and then
1935 * overwrite with 0, i.e., "me", for the sake of vrf advertisement.
1937 uint8_t nhfamily
= NEXTHOP_FAMILY(path_vpn
->attr
->mp_nexthop_len
);
1939 memset(&nexthop_orig
, 0, sizeof(nexthop_orig
));
1940 nexthop_orig
.family
= nhfamily
;
1945 nexthop_orig
.u
.prefix4
= path_vpn
->attr
->mp_nexthop_global_in
;
1946 nexthop_orig
.prefixlen
= IPV4_MAX_BITLEN
;
1948 if (CHECK_FLAG(to_bgp
->af_flags
[afi
][safi
],
1949 BGP_CONFIG_VRF_TO_VRF_IMPORT
)) {
1950 static_attr
.nexthop
.s_addr
=
1951 nexthop_orig
.u
.prefix4
.s_addr
;
1953 static_attr
.mp_nexthop_global_in
=
1954 path_vpn
->attr
->mp_nexthop_global_in
;
1955 static_attr
.mp_nexthop_len
=
1956 path_vpn
->attr
->mp_nexthop_len
;
1958 static_attr
.flag
|= ATTR_FLAG_BIT(BGP_ATTR_NEXT_HOP
);
1962 nexthop_orig
.u
.prefix6
= path_vpn
->attr
->mp_nexthop_global
;
1963 nexthop_orig
.prefixlen
= IPV6_MAX_BITLEN
;
1965 if (CHECK_FLAG(to_bgp
->af_flags
[afi
][safi
],
1966 BGP_CONFIG_VRF_TO_VRF_IMPORT
)) {
1967 static_attr
.mp_nexthop_global
= nexthop_orig
.u
.prefix6
;
1973 * route map handling
1975 if (to_bgp
->vpn_policy
[afi
].rmap
[BGP_VPN_POLICY_DIR_FROMVPN
]) {
1976 struct bgp_path_info info
;
1977 route_map_result_t ret
;
1979 memset(&info
, 0, sizeof(info
));
1980 info
.peer
= to_bgp
->peer_self
;
1981 info
.attr
= &static_attr
;
1982 info
.extra
= path_vpn
->extra
; /* Used for source-vrf filter */
1983 ret
= route_map_apply(to_bgp
->vpn_policy
[afi
]
1984 .rmap
[BGP_VPN_POLICY_DIR_FROMVPN
],
1986 if (RMAP_DENYMATCH
== ret
) {
1987 bgp_attr_flush(&static_attr
); /* free any added parts */
1990 "%s: vrf %s vpn-policy route map \"%s\" says DENY, returning",
1991 __func__
, to_bgp
->name_pretty
,
1992 to_bgp
->vpn_policy
[afi
]
1993 .rmap
[BGP_VPN_POLICY_DIR_FROMVPN
]
1998 * if route-map changed nexthop, don't nexthop-self on output
2000 if (!CHECK_FLAG(static_attr
.rmap_change_flags
,
2001 BATTR_RMAP_NEXTHOP_UNCHANGED
))
2002 nexthop_self_flag
= 0;
2005 new_attr
= bgp_attr_intern(&static_attr
);
2006 bgp_attr_flush(&static_attr
);
2008 bn
= bgp_afi_node_get(to_bgp
->rib
[afi
][safi
], afi
, safi
, p
, NULL
);
2011 * ensure labels are copied
2013 * However, there is a special case: if the route originated in
2014 * another local VRF (as opposed to arriving via VPN), then the
2015 * nexthop is reached by hairpinning through this router (me)
2016 * using IP forwarding only (no LSP). Therefore, the route
2017 * imported to the VRF should not have labels attached. Note
2018 * that nexthop tracking is also involved: eliminating the
2019 * labels for these routes enables the non-labeled nexthops
2020 * from the originating VRF to be considered valid for this route.
2022 if (!CHECK_FLAG(to_bgp
->af_flags
[afi
][safi
],
2023 BGP_CONFIG_VRF_TO_VRF_IMPORT
)) {
2024 /* work back to original route */
2025 bpi_ultimate
= bgp_get_imported_bpi_ultimate(path_vpn
);
2028 * if original route was unicast,
2029 * then it did not arrive over vpn
2031 if (bpi_ultimate
->net
) {
2032 struct bgp_table
*table
;
2034 table
= bgp_dest_table(bpi_ultimate
->net
);
2035 if (table
&& (table
->safi
== SAFI_UNICAST
))
2040 if (!origin_local
&& path_vpn
->extra
2041 && path_vpn
->extra
->num_labels
) {
2042 num_labels
= path_vpn
->extra
->num_labels
;
2043 if (num_labels
> BGP_MAX_LABELS
)
2044 num_labels
= BGP_MAX_LABELS
;
2045 pLabels
= path_vpn
->extra
->label
;
2050 zlog_debug("%s: pfx %pBD: num_labels %d", __func__
,
2051 path_vpn
->net
, num_labels
);
2054 * For VRF-2-VRF route-leaking,
2055 * the source will be the originating VRF.
2057 * If ACCEPT_OWN mechanism is enabled, then we SHOULD(?)
2058 * get the source VRF (BGP) by looking at the RD.
2060 struct bgp
*src_bgp
= bgp_lookup_by_rd(path_vpn
, prd
, afi
);
2062 if (path_vpn
->extra
&& path_vpn
->extra
->bgp_orig
)
2063 src_vrf
= path_vpn
->extra
->bgp_orig
;
2069 leak_update(to_bgp
, bn
, new_attr
, afi
, safi
, path_vpn
, pLabels
,
2070 num_labels
, src_vrf
, &nexthop_orig
, nexthop_self_flag
,
2075 bool vpn_leak_to_vrf_update(struct bgp
*from_bgp
,
2076 struct bgp_path_info
*path_vpn
,
2077 struct prefix_rd
*prd
)
2079 struct listnode
*mnode
, *mnnode
;
2081 bool leak_success
= false;
2083 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
);
2086 zlog_debug("%s: start (path_vpn=%p)", __func__
, path_vpn
);
2088 /* Loop over VRFs */
2089 for (ALL_LIST_ELEMENTS(bm
->bgp
, mnode
, mnnode
, bgp
)) {
2091 if (!path_vpn
->extra
2092 || path_vpn
->extra
->bgp_orig
!= bgp
) { /* no loop */
2093 leak_success
|= vpn_leak_to_vrf_update_onevrf(
2094 bgp
, from_bgp
, path_vpn
, prd
);
2097 return leak_success
;
2100 void vpn_leak_to_vrf_withdraw(struct bgp
*from_bgp
, /* from */
2101 struct bgp_path_info
*path_vpn
) /* route */
2103 const struct prefix
*p
;
2105 safi_t safi
= SAFI_UNICAST
;
2107 struct listnode
*mnode
, *mnnode
;
2108 struct bgp_dest
*bn
;
2109 struct bgp_path_info
*bpi
;
2110 const char *debugmsg
;
2112 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
);
2115 zlog_debug("%s: entry: p=%pBD, type=%d, sub_type=%d", __func__
,
2116 path_vpn
->net
, path_vpn
->type
, path_vpn
->sub_type
);
2119 zlog_debug("%s: start (path_vpn=%p)", __func__
, path_vpn
);
2121 if (!path_vpn
->net
) {
2122 #ifdef ENABLE_BGP_VNC
2123 /* BGP_ROUTE_RFP routes do not have path_vpn->net set (yet) */
2124 if (path_vpn
->type
== ZEBRA_ROUTE_BGP
2125 && path_vpn
->sub_type
== BGP_ROUTE_RFP
) {
2132 "%s: path_vpn->net unexpectedly NULL, no prefix, bailing",
2137 p
= bgp_dest_get_prefix(path_vpn
->net
);
2138 afi
= family2afi(p
->family
);
2140 /* Loop over VRFs */
2141 for (ALL_LIST_ELEMENTS(bm
->bgp
, mnode
, mnnode
, bgp
)) {
2142 if (!vpn_leak_from_vpn_active(bgp
, afi
, &debugmsg
)) {
2144 zlog_debug("%s: skipping: %s", __func__
,
2149 /* Check for intersection of route targets */
2150 if (!ecommunity_include(
2151 bgp
->vpn_policy
[afi
]
2152 .rtlist
[BGP_VPN_POLICY_DIR_FROMVPN
],
2153 bgp_attr_get_ecommunity(path_vpn
->attr
))) {
2159 zlog_debug("%s: withdrawing from vrf %s", __func__
,
2162 bn
= bgp_afi_node_get(bgp
->rib
[afi
][safi
], afi
, safi
, p
, NULL
);
2164 for (bpi
= bgp_dest_get_bgp_path_info(bn
); bpi
;
2167 && (struct bgp_path_info
*)bpi
->extra
->parent
2175 zlog_debug("%s: deleting bpi %p", __func__
,
2177 bgp_aggregate_decrement(bgp
, p
, bpi
, afi
, safi
);
2178 bgp_path_info_delete(bn
, bpi
);
2179 bgp_process(bgp
, bn
, afi
, safi
);
2181 bgp_dest_unlock_node(bn
);
2185 void vpn_leak_to_vrf_withdraw_all(struct bgp
*to_bgp
, afi_t afi
)
2187 struct bgp_dest
*bn
;
2188 struct bgp_path_info
*bpi
;
2189 safi_t safi
= SAFI_UNICAST
;
2190 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
);
2193 zlog_debug("%s: entry", __func__
);
2195 * Walk vrf table, delete bpi with bgp_orig in a different vrf
2197 for (bn
= bgp_table_top(to_bgp
->rib
[afi
][safi
]); bn
;
2198 bn
= bgp_route_next(bn
)) {
2200 for (bpi
= bgp_dest_get_bgp_path_info(bn
); bpi
;
2202 if (bpi
->extra
&& bpi
->extra
->bgp_orig
!= to_bgp
&&
2203 bpi
->extra
->parent
&&
2204 is_pi_family_vpn(bpi
->extra
->parent
)) {
2207 bgp_aggregate_decrement(to_bgp
,
2208 bgp_dest_get_prefix(bn
),
2210 bgp_path_info_delete(bn
, bpi
);
2211 bgp_process(to_bgp
, bn
, afi
, safi
);
2217 void vpn_leak_to_vrf_update_all(struct bgp
*to_bgp
, struct bgp
*vpn_from
,
2220 struct bgp_dest
*pdest
;
2221 safi_t safi
= SAFI_MPLS_VPN
;
2228 for (pdest
= bgp_table_top(vpn_from
->rib
[afi
][safi
]); pdest
;
2229 pdest
= bgp_route_next(pdest
)) {
2230 struct bgp_table
*table
;
2231 struct bgp_dest
*bn
;
2232 struct bgp_path_info
*bpi
;
2234 /* This is the per-RD table of prefixes */
2235 table
= bgp_dest_get_bgp_table_info(pdest
);
2240 for (bn
= bgp_table_top(table
); bn
; bn
= bgp_route_next(bn
)) {
2242 for (bpi
= bgp_dest_get_bgp_path_info(bn
); bpi
;
2246 bpi
->extra
->bgp_orig
== to_bgp
)
2249 vpn_leak_to_vrf_update_onevrf(to_bgp
, vpn_from
,
2257 * This function is called for definition/deletion/change to a route-map
2259 static void vpn_policy_routemap_update(struct bgp
*bgp
, const char *rmap_name
)
2261 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_RMAP_EVENT
);
2263 struct route_map
*rmap
;
2265 if (bgp
->inst_type
!= BGP_INSTANCE_TYPE_DEFAULT
2266 && bgp
->inst_type
!= BGP_INSTANCE_TYPE_VRF
) {
2271 rmap
= route_map_lookup_by_name(rmap_name
); /* NULL if deleted */
2273 for (afi
= 0; afi
< AFI_MAX
; ++afi
) {
2275 if (bgp
->vpn_policy
[afi
].rmap_name
[BGP_VPN_POLICY_DIR_TOVPN
]
2276 && !strcmp(rmap_name
,
2277 bgp
->vpn_policy
[afi
]
2278 .rmap_name
[BGP_VPN_POLICY_DIR_TOVPN
])) {
2282 "%s: rmap \"%s\" matches vrf-policy tovpn for as %d afi %s",
2283 __func__
, rmap_name
, bgp
->as
,
2286 vpn_leak_prechange(BGP_VPN_POLICY_DIR_TOVPN
, afi
,
2287 bgp_get_default(), bgp
);
2289 zlog_debug("%s: after vpn_leak_prechange",
2292 /* in case of definition/deletion */
2293 bgp
->vpn_policy
[afi
].rmap
[BGP_VPN_POLICY_DIR_TOVPN
] =
2296 vpn_leak_postchange(BGP_VPN_POLICY_DIR_TOVPN
, afi
,
2297 bgp_get_default(), bgp
);
2300 zlog_debug("%s: after vpn_leak_postchange",
2304 if (bgp
->vpn_policy
[afi
].rmap_name
[BGP_VPN_POLICY_DIR_FROMVPN
]
2305 && !strcmp(rmap_name
,
2306 bgp
->vpn_policy
[afi
]
2307 .rmap_name
[BGP_VPN_POLICY_DIR_FROMVPN
])) {
2310 zlog_debug("%s: rmap \"%s\" matches vrf-policy fromvpn for as %d afi %s",
2311 __func__
, rmap_name
, bgp
->as
,
2315 vpn_leak_prechange(BGP_VPN_POLICY_DIR_FROMVPN
, afi
,
2316 bgp_get_default(), bgp
);
2318 /* in case of definition/deletion */
2319 bgp
->vpn_policy
[afi
].rmap
[BGP_VPN_POLICY_DIR_FROMVPN
] =
2322 vpn_leak_postchange(BGP_VPN_POLICY_DIR_FROMVPN
, afi
,
2323 bgp_get_default(), bgp
);
2328 /* This API is used during router-id change, reflect VPNs
2329 * auto RD and RT values and readvertise routes to VPN table.
2331 void vpn_handle_router_id_update(struct bgp
*bgp
, bool withdraw
,
2335 int debug
= (BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
)
2336 | BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
));
2338 const char *export_name
;
2339 char buf
[RD_ADDRSTRLEN
];
2340 struct bgp
*bgp_import
;
2341 struct listnode
*node
;
2342 struct ecommunity
*ecom
;
2343 enum vpn_policy_direction idir
, edir
;
2346 * Router-id change that is not explicitly configured
2347 * (a change from zebra, frr restart for example)
2348 * should not replace a configured vpn RD/RT.
2352 zlog_debug("%s: skipping non explicit router-id change",
2357 if (bgp
->inst_type
!= BGP_INSTANCE_TYPE_DEFAULT
2358 && bgp
->inst_type
!= BGP_INSTANCE_TYPE_VRF
)
2361 export_name
= bgp
->name
? bgp
->name
: VRF_DEFAULT_NAME
;
2362 idir
= BGP_VPN_POLICY_DIR_FROMVPN
;
2363 edir
= BGP_VPN_POLICY_DIR_TOVPN
;
2365 for (afi
= 0; afi
< AFI_MAX
; ++afi
) {
2366 if (!vpn_leak_to_vpn_active(bgp
, afi
, NULL
))
2370 vpn_leak_prechange(BGP_VPN_POLICY_DIR_TOVPN
,
2371 afi
, bgp_get_default(), bgp
);
2373 zlog_debug("%s: %s after to_vpn vpn_leak_prechange",
2374 __func__
, export_name
);
2376 /* Remove import RT from VRFs */
2377 ecom
= bgp
->vpn_policy
[afi
].rtlist
[edir
];
2378 for (ALL_LIST_ELEMENTS_RO(bgp
->vpn_policy
[afi
].
2379 export_vrf
, node
, vname
)) {
2380 if (strcmp(vname
, VRF_DEFAULT_NAME
) == 0)
2381 bgp_import
= bgp_get_default();
2383 bgp_import
= bgp_lookup_by_name(vname
);
2388 bgp_import
->vpn_policy
[afi
]
2390 (struct ecommunity_val
*)ecom
->val
);
2393 /* New router-id derive auto RD and RT and export
2396 form_auto_rd(bgp
->router_id
, bgp
->vrf_rd_id
,
2397 &bgp
->vrf_prd_auto
);
2398 bgp
->vpn_policy
[afi
].tovpn_rd
= bgp
->vrf_prd_auto
;
2399 prefix_rd2str(&bgp
->vpn_policy
[afi
].tovpn_rd
, buf
,
2402 /* free up pre-existing memory if any and allocate
2403 * the ecommunity attribute with new RD/RT
2405 if (bgp
->vpn_policy
[afi
].rtlist
[edir
])
2407 &bgp
->vpn_policy
[afi
].rtlist
[edir
]);
2408 bgp
->vpn_policy
[afi
].rtlist
[edir
] = ecommunity_str2com(
2409 buf
, ECOMMUNITY_ROUTE_TARGET
, 0);
2411 /* Update import_vrf rt_list */
2412 ecom
= bgp
->vpn_policy
[afi
].rtlist
[edir
];
2413 for (ALL_LIST_ELEMENTS_RO(bgp
->vpn_policy
[afi
].
2414 export_vrf
, node
, vname
)) {
2415 if (strcmp(vname
, VRF_DEFAULT_NAME
) == 0)
2416 bgp_import
= bgp_get_default();
2418 bgp_import
= bgp_lookup_by_name(vname
);
2421 if (bgp_import
->vpn_policy
[afi
].rtlist
[idir
])
2422 bgp_import
->vpn_policy
[afi
].rtlist
[idir
]
2424 bgp_import
->vpn_policy
[afi
]
2425 .rtlist
[idir
], ecom
);
2427 bgp_import
->vpn_policy
[afi
].rtlist
[idir
]
2428 = ecommunity_dup(ecom
);
2431 /* Update routes to VPN */
2432 vpn_leak_postchange(BGP_VPN_POLICY_DIR_TOVPN
,
2433 afi
, bgp_get_default(),
2436 zlog_debug("%s: %s after to_vpn vpn_leak_postchange",
2437 __func__
, export_name
);
2442 void vpn_policy_routemap_event(const char *rmap_name
)
2444 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_RMAP_EVENT
);
2445 struct listnode
*mnode
, *mnnode
;
2449 zlog_debug("%s: entry", __func__
);
2451 if (bm
->bgp
== NULL
) /* may be called during cleanup */
2454 for (ALL_LIST_ELEMENTS(bm
->bgp
, mnode
, mnnode
, bgp
))
2455 vpn_policy_routemap_update(bgp
, rmap_name
);
2458 void vrf_import_from_vrf(struct bgp
*to_bgp
, struct bgp
*from_bgp
,
2459 afi_t afi
, safi_t safi
)
2461 const char *export_name
;
2462 enum vpn_policy_direction idir
, edir
;
2463 char *vname
, *tmp_name
;
2464 char buf
[RD_ADDRSTRLEN
];
2465 struct ecommunity
*ecom
;
2466 bool first_export
= false;
2468 struct listnode
*node
;
2469 bool is_inst_match
= false;
2471 export_name
= to_bgp
->name
? to_bgp
->name
: VRF_DEFAULT_NAME
;
2472 idir
= BGP_VPN_POLICY_DIR_FROMVPN
;
2473 edir
= BGP_VPN_POLICY_DIR_TOVPN
;
2475 debug
= (BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
) |
2476 BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
));
2479 * Cross-ref both VRFs. Also, note if this is the first time
2480 * any VRF is importing from "import_vrf".
2482 vname
= (from_bgp
->name
? XSTRDUP(MTYPE_TMP
, from_bgp
->name
)
2483 : XSTRDUP(MTYPE_TMP
, VRF_DEFAULT_NAME
));
2485 /* Check the import_vrf list of destination vrf for the source vrf name,
2488 for (ALL_LIST_ELEMENTS_RO(to_bgp
->vpn_policy
[afi
].import_vrf
,
2490 if (strcmp(vname
, tmp_name
) == 0) {
2491 is_inst_match
= true;
2496 listnode_add(to_bgp
->vpn_policy
[afi
].import_vrf
,
2499 XFREE(MTYPE_TMP
, vname
);
2501 /* Check if the source vrf already exports to any vrf,
2502 * first time export requires to setup auto derived RD/RT values.
2503 * Add the destination vrf name to export vrf list if it is
2506 is_inst_match
= false;
2507 vname
= XSTRDUP(MTYPE_TMP
, export_name
);
2508 if (!listcount(from_bgp
->vpn_policy
[afi
].export_vrf
)) {
2509 first_export
= true;
2511 for (ALL_LIST_ELEMENTS_RO(from_bgp
->vpn_policy
[afi
].export_vrf
,
2513 if (strcmp(vname
, tmp_name
) == 0) {
2514 is_inst_match
= true;
2520 listnode_add(from_bgp
->vpn_policy
[afi
].export_vrf
,
2523 XFREE(MTYPE_TMP
, vname
);
2525 /* Update import RT for current VRF using export RT of the VRF we're
2526 * importing from. First though, make sure "import_vrf" has that
2530 form_auto_rd(from_bgp
->router_id
, from_bgp
->vrf_rd_id
,
2531 &from_bgp
->vrf_prd_auto
);
2532 from_bgp
->vpn_policy
[afi
].tovpn_rd
= from_bgp
->vrf_prd_auto
;
2533 SET_FLAG(from_bgp
->vpn_policy
[afi
].flags
,
2534 BGP_VPN_POLICY_TOVPN_RD_SET
);
2535 prefix_rd2str(&from_bgp
->vpn_policy
[afi
].tovpn_rd
,
2537 from_bgp
->vpn_policy
[afi
].rtlist
[edir
] =
2538 ecommunity_str2com(buf
, ECOMMUNITY_ROUTE_TARGET
, 0);
2539 SET_FLAG(from_bgp
->af_flags
[afi
][safi
],
2540 BGP_CONFIG_VRF_TO_VRF_EXPORT
);
2541 from_bgp
->vpn_policy
[afi
].tovpn_label
=
2542 BGP_PREVENT_VRF_2_VRF_LEAK
;
2544 ecom
= from_bgp
->vpn_policy
[afi
].rtlist
[edir
];
2545 if (to_bgp
->vpn_policy
[afi
].rtlist
[idir
])
2546 to_bgp
->vpn_policy
[afi
].rtlist
[idir
] =
2547 ecommunity_merge(to_bgp
->vpn_policy
[afi
]
2548 .rtlist
[idir
], ecom
);
2550 to_bgp
->vpn_policy
[afi
].rtlist
[idir
] = ecommunity_dup(ecom
);
2551 SET_FLAG(to_bgp
->af_flags
[afi
][safi
], BGP_CONFIG_VRF_TO_VRF_IMPORT
);
2554 const char *from_name
;
2555 char *ecom1
, *ecom2
;
2557 from_name
= from_bgp
->name
? from_bgp
->name
:
2560 ecom1
= ecommunity_ecom2str(
2561 to_bgp
->vpn_policy
[afi
].rtlist
[idir
],
2562 ECOMMUNITY_FORMAT_ROUTE_MAP
, 0);
2564 ecom2
= ecommunity_ecom2str(
2565 to_bgp
->vpn_policy
[afi
].rtlist
[edir
],
2566 ECOMMUNITY_FORMAT_ROUTE_MAP
, 0);
2569 "%s from %s to %s first_export %u import-rt %s export-rt %s",
2570 __func__
, from_name
, export_name
, first_export
, ecom1
,
2573 ecommunity_strfree(&ecom1
);
2574 ecommunity_strfree(&ecom2
);
2577 /* Does "import_vrf" first need to export its routes or that
2578 * is already done and we just need to import those routes
2579 * from the global table?
2582 vpn_leak_postchange(edir
, afi
, bgp_get_default(), from_bgp
);
2584 vpn_leak_postchange(idir
, afi
, bgp_get_default(), to_bgp
);
2587 void vrf_unimport_from_vrf(struct bgp
*to_bgp
, struct bgp
*from_bgp
,
2588 afi_t afi
, safi_t safi
)
2590 const char *export_name
, *tmp_name
;
2591 enum vpn_policy_direction idir
, edir
;
2593 struct ecommunity
*ecom
= NULL
;
2594 struct listnode
*node
;
2597 export_name
= to_bgp
->name
? to_bgp
->name
: VRF_DEFAULT_NAME
;
2598 tmp_name
= from_bgp
->name
? from_bgp
->name
: VRF_DEFAULT_NAME
;
2599 idir
= BGP_VPN_POLICY_DIR_FROMVPN
;
2600 edir
= BGP_VPN_POLICY_DIR_TOVPN
;
2602 debug
= (BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
) |
2603 BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
));
2605 /* Were we importing from "import_vrf"? */
2606 for (ALL_LIST_ELEMENTS_RO(to_bgp
->vpn_policy
[afi
].import_vrf
, node
,
2608 if (strcmp(vname
, tmp_name
) == 0)
2613 * We do not check in the cli if the passed in bgp
2614 * instance is actually imported into us before
2615 * we call this function. As such if we do not
2616 * find this in the import_vrf list than
2617 * we just need to return safely.
2623 zlog_debug("%s from %s to %s", __func__
, tmp_name
, export_name
);
2625 /* Remove "import_vrf" from our import list. */
2626 listnode_delete(to_bgp
->vpn_policy
[afi
].import_vrf
, vname
);
2627 XFREE(MTYPE_TMP
, vname
);
2629 /* Remove routes imported from "import_vrf". */
2630 /* TODO: In the current logic, we have to first remove all
2631 * imported routes and then (if needed) import back routes
2633 vpn_leak_prechange(idir
, afi
, bgp_get_default(), to_bgp
);
2635 if (to_bgp
->vpn_policy
[afi
].import_vrf
->count
== 0) {
2636 if (!to_bgp
->vpn_policy
[afi
].rmap
[idir
])
2637 UNSET_FLAG(to_bgp
->af_flags
[afi
][safi
],
2638 BGP_CONFIG_VRF_TO_VRF_IMPORT
);
2639 if (to_bgp
->vpn_policy
[afi
].rtlist
[idir
])
2640 ecommunity_free(&to_bgp
->vpn_policy
[afi
].rtlist
[idir
]);
2642 ecom
= from_bgp
->vpn_policy
[afi
].rtlist
[edir
];
2644 ecommunity_del_val(to_bgp
->vpn_policy
[afi
].rtlist
[idir
],
2645 (struct ecommunity_val
*)ecom
->val
);
2646 vpn_leak_postchange(idir
, afi
, bgp_get_default(), to_bgp
);
2651 * So SA is assuming that since the ALL_LIST_ELEMENTS_RO
2652 * below is checking for NULL that export_vrf can be
2653 * NULL, consequently it is complaining( like a cabbage )
2654 * that we could dereference and crash in the listcount(..)
2656 * So make it happy, under protest, with liberty and justice
2659 assert(from_bgp
->vpn_policy
[afi
].export_vrf
);
2661 /* Remove us from "import_vrf's" export list. If no other VRF
2662 * is importing from "import_vrf", cleanup appropriately.
2664 for (ALL_LIST_ELEMENTS_RO(from_bgp
->vpn_policy
[afi
].export_vrf
,
2666 if (strcmp(vname
, export_name
) == 0)
2671 * If we have gotten to this point then the vname must
2672 * exist. If not, we are in a world of trouble and
2673 * have slag sitting around.
2675 * import_vrf and export_vrf must match in having
2676 * the in/out names as appropriate.
2677 * export_vrf list could have been cleaned up
2678 * as part of no router bgp source instnace.
2683 listnode_delete(from_bgp
->vpn_policy
[afi
].export_vrf
, vname
);
2684 XFREE(MTYPE_TMP
, vname
);
2686 if (!listcount(from_bgp
->vpn_policy
[afi
].export_vrf
)) {
2687 vpn_leak_prechange(edir
, afi
, bgp_get_default(), from_bgp
);
2688 ecommunity_free(&from_bgp
->vpn_policy
[afi
].rtlist
[edir
]);
2689 UNSET_FLAG(from_bgp
->af_flags
[afi
][safi
],
2690 BGP_CONFIG_VRF_TO_VRF_EXPORT
);
2691 memset(&from_bgp
->vpn_policy
[afi
].tovpn_rd
, 0,
2692 sizeof(struct prefix_rd
));
2693 UNSET_FLAG(from_bgp
->vpn_policy
[afi
].flags
,
2694 BGP_VPN_POLICY_TOVPN_RD_SET
);
2695 from_bgp
->vpn_policy
[afi
].tovpn_label
= MPLS_LABEL_NONE
;
2700 /* For testing purpose, static route of MPLS-VPN. */
2701 DEFUN (vpnv4_network
,
2703 "network A.B.C.D/M rd ASN:NN_OR_IP-ADDRESS:NN <tag|label> (0-1048575)",
2704 "Specify a network to announce via BGP\n"
2706 "Specify Route Distinguisher\n"
2707 "VPN Route Distinguisher\n"
2708 "VPN NLRI label (tag)\n"
2709 "VPN NLRI label (tag)\n"
2712 int idx_ipv4_prefixlen
= 1;
2713 int idx_ext_community
= 3;
2715 return bgp_static_set_safi(
2716 AFI_IP
, SAFI_MPLS_VPN
, vty
, argv
[idx_ipv4_prefixlen
]->arg
,
2717 argv
[idx_ext_community
]->arg
, argv
[idx_label
]->arg
, NULL
, 0,
2718 NULL
, NULL
, NULL
, NULL
);
2721 DEFUN (vpnv4_network_route_map
,
2722 vpnv4_network_route_map_cmd
,
2723 "network A.B.C.D/M rd ASN:NN_OR_IP-ADDRESS:NN <tag|label> (0-1048575) route-map RMAP_NAME",
2724 "Specify a network to announce via BGP\n"
2726 "Specify Route Distinguisher\n"
2727 "VPN Route Distinguisher\n"
2728 "VPN NLRI label (tag)\n"
2729 "VPN NLRI label (tag)\n"
2734 int idx_ipv4_prefixlen
= 1;
2735 int idx_ext_community
= 3;
2738 return bgp_static_set_safi(
2739 AFI_IP
, SAFI_MPLS_VPN
, vty
, argv
[idx_ipv4_prefixlen
]->arg
,
2740 argv
[idx_ext_community
]->arg
, argv
[idx_label
]->arg
,
2741 argv
[idx_word_2
]->arg
, 0, NULL
, NULL
, NULL
, NULL
);
2744 /* For testing purpose, static route of MPLS-VPN. */
2745 DEFUN (no_vpnv4_network
,
2746 no_vpnv4_network_cmd
,
2747 "no network A.B.C.D/M rd ASN:NN_OR_IP-ADDRESS:NN <tag|label> (0-1048575)",
2749 "Specify a network to announce via BGP\n"
2751 "Specify Route Distinguisher\n"
2752 "VPN Route Distinguisher\n"
2753 "VPN NLRI label (tag)\n"
2754 "VPN NLRI label (tag)\n"
2757 int idx_ipv4_prefixlen
= 2;
2758 int idx_ext_community
= 4;
2760 return bgp_static_unset_safi(AFI_IP
, SAFI_MPLS_VPN
, vty
,
2761 argv
[idx_ipv4_prefixlen
]->arg
,
2762 argv
[idx_ext_community
]->arg
,
2763 argv
[idx_label
]->arg
, 0, NULL
, NULL
, NULL
);
2766 DEFUN (vpnv6_network
,
2768 "network X:X::X:X/M rd ASN:NN_OR_IP-ADDRESS:NN <tag|label> (0-1048575) [route-map RMAP_NAME]",
2769 "Specify a network to announce via BGP\n"
2770 "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n"
2771 "Specify Route Distinguisher\n"
2772 "VPN Route Distinguisher\n"
2773 "VPN NLRI label (tag)\n"
2774 "VPN NLRI label (tag)\n"
2779 int idx_ipv6_prefix
= 1;
2780 int idx_ext_community
= 3;
2784 return bgp_static_set_safi(
2785 AFI_IP6
, SAFI_MPLS_VPN
, vty
, argv
[idx_ipv6_prefix
]->arg
,
2786 argv
[idx_ext_community
]->arg
, argv
[idx_label
]->arg
,
2787 argv
[idx_word_2
]->arg
, 0, NULL
, NULL
, NULL
, NULL
);
2789 return bgp_static_set_safi(
2790 AFI_IP6
, SAFI_MPLS_VPN
, vty
, argv
[idx_ipv6_prefix
]->arg
,
2791 argv
[idx_ext_community
]->arg
, argv
[idx_label
]->arg
,
2792 NULL
, 0, NULL
, NULL
, NULL
, NULL
);
2795 /* For testing purpose, static route of MPLS-VPN. */
2796 DEFUN (no_vpnv6_network
,
2797 no_vpnv6_network_cmd
,
2798 "no network X:X::X:X/M rd ASN:NN_OR_IP-ADDRESS:NN <tag|label> (0-1048575)",
2800 "Specify a network to announce via BGP\n"
2801 "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n"
2802 "Specify Route Distinguisher\n"
2803 "VPN Route Distinguisher\n"
2804 "VPN NLRI label (tag)\n"
2805 "VPN NLRI label (tag)\n"
2808 int idx_ipv6_prefix
= 2;
2809 int idx_ext_community
= 4;
2811 return bgp_static_unset_safi(AFI_IP6
, SAFI_MPLS_VPN
, vty
,
2812 argv
[idx_ipv6_prefix
]->arg
,
2813 argv
[idx_ext_community
]->arg
,
2814 argv
[idx_label
]->arg
, 0, NULL
, NULL
, NULL
);
2817 int bgp_show_mpls_vpn(struct vty
*vty
, afi_t afi
, struct prefix_rd
*prd
,
2818 enum bgp_show_type type
, void *output_arg
, int tags
,
2822 struct bgp_table
*table
;
2824 bgp
= bgp_get_default();
2827 vty_out(vty
, "No BGP process is configured\n");
2829 vty_out(vty
, "{}\n");
2832 table
= bgp
->rib
[afi
][SAFI_MPLS_VPN
];
2833 return bgp_show_table_rd(vty
, bgp
, SAFI_MPLS_VPN
, table
, prd
, type
,
2834 output_arg
, use_json
);
2837 DEFUN (show_bgp_ip_vpn_all_rd
,
2838 show_bgp_ip_vpn_all_rd_cmd
,
2839 "show bgp "BGP_AFI_CMD_STR
" vpn all [rd <ASN:NN_OR_IP-ADDRESS:NN|all>] [json]",
2843 "Display VPN NLRI specific information\n"
2844 "Display VPN NLRI specific information\n"
2845 "Display information for a route distinguisher\n"
2846 "VPN Route Distinguisher\n"
2847 "All VPN Route Distinguishers\n"
2851 struct prefix_rd prd
;
2855 if (argv_find_and_parse_afi(argv
, argc
, &idx
, &afi
)) {
2856 /* Constrain search if user supplies RD && RD != "all" */
2857 if (argv_find(argv
, argc
, "rd", &idx
)
2858 && strcmp(argv
[idx
+ 1]->arg
, "all")) {
2859 ret
= str2prefix_rd(argv
[idx
+ 1]->arg
, &prd
);
2862 "%% Malformed Route Distinguisher\n");
2865 return bgp_show_mpls_vpn(vty
, afi
, &prd
,
2866 bgp_show_type_normal
, NULL
, 0,
2867 use_json(argc
, argv
));
2869 return bgp_show_mpls_vpn(vty
, afi
, NULL
,
2870 bgp_show_type_normal
, NULL
, 0,
2871 use_json(argc
, argv
));
2877 ALIAS(show_bgp_ip_vpn_all_rd
,
2878 show_bgp_ip_vpn_rd_cmd
,
2879 "show bgp "BGP_AFI_CMD_STR
" vpn rd <ASN:NN_OR_IP-ADDRESS:NN|all> [json]",
2883 "Display VPN NLRI specific information\n"
2884 "Display information for a route distinguisher\n"
2885 "VPN Route Distinguisher\n"
2886 "All VPN Route Distinguishers\n"
2889 #ifdef KEEP_OLD_VPN_COMMANDS
2890 DEFUN (show_ip_bgp_vpn_rd
,
2891 show_ip_bgp_vpn_rd_cmd
,
2892 "show ip bgp "BGP_AFI_CMD_STR
" vpn rd <ASN:NN_OR_IP-ADDRESS:NN|all>",
2898 "Display information for a route distinguisher\n"
2899 "VPN Route Distinguisher\n"
2900 "All VPN Route Distinguishers\n")
2902 int idx_ext_community
= argc
- 1;
2904 struct prefix_rd prd
;
2908 if (argv_find_and_parse_vpnvx(argv
, argc
, &idx
, &afi
)) {
2909 if (!strcmp(argv
[idx_ext_community
]->arg
, "all"))
2910 return bgp_show_mpls_vpn(vty
, afi
, NULL
,
2911 bgp_show_type_normal
, NULL
, 0,
2913 ret
= str2prefix_rd(argv
[idx_ext_community
]->arg
, &prd
);
2915 vty_out(vty
, "%% Malformed Route Distinguisher\n");
2918 return bgp_show_mpls_vpn(vty
, afi
, &prd
, bgp_show_type_normal
,
2924 DEFUN (show_ip_bgp_vpn_all
,
2925 show_ip_bgp_vpn_all_cmd
,
2926 "show [ip] bgp <vpnv4|vpnv6>",
2935 if (argv_find_and_parse_vpnvx(argv
, argc
, &idx
, &afi
))
2936 return bgp_show_mpls_vpn(vty
, afi
, NULL
, bgp_show_type_normal
,
2941 DEFUN (show_ip_bgp_vpn_all_tags
,
2942 show_ip_bgp_vpn_all_tags_cmd
,
2943 "show [ip] bgp <vpnv4|vpnv6> all tags",
2948 "Display information about all VPNv4/VPNV6 NLRIs\n"
2949 "Display BGP tags for prefixes\n")
2954 if (argv_find_and_parse_vpnvx(argv
, argc
, &idx
, &afi
))
2955 return bgp_show_mpls_vpn(vty
, afi
, NULL
, bgp_show_type_normal
,
2960 DEFUN (show_ip_bgp_vpn_rd_tags
,
2961 show_ip_bgp_vpn_rd_tags_cmd
,
2962 "show [ip] bgp <vpnv4|vpnv6> rd <ASN:NN_OR_IP-ADDRESS:NN|all> tags",
2967 "Display information for a route distinguisher\n"
2968 "VPN Route Distinguisher\n"
2969 "All VPN Route Distinguishers\n"
2970 "Display BGP tags for prefixes\n")
2972 int idx_ext_community
= 5;
2974 struct prefix_rd prd
;
2978 if (argv_find_and_parse_vpnvx(argv
, argc
, &idx
, &afi
)) {
2979 if (!strcmp(argv
[idx_ext_community
]->arg
, "all"))
2980 return bgp_show_mpls_vpn(vty
, afi
, NULL
,
2981 bgp_show_type_normal
, NULL
, 1,
2983 ret
= str2prefix_rd(argv
[idx_ext_community
]->arg
, &prd
);
2985 vty_out(vty
, "%% Malformed Route Distinguisher\n");
2988 return bgp_show_mpls_vpn(vty
, afi
, &prd
, bgp_show_type_normal
,
2994 DEFUN (show_ip_bgp_vpn_all_neighbor_routes
,
2995 show_ip_bgp_vpn_all_neighbor_routes_cmd
,
2996 "show [ip] bgp <vpnv4|vpnv6> all neighbors A.B.C.D routes [json]",
3001 "Display information about all VPNv4/VPNv6 NLRIs\n"
3002 "Detailed information on TCP and BGP neighbor connections\n"
3003 "Neighbor to display information about\n"
3004 "Display routes learned from neighbor\n"
3011 bool uj
= use_json(argc
, argv
);
3015 if (argv_find_and_parse_vpnvx(argv
, argc
, &idx
, &afi
)) {
3016 ret
= str2sockunion(argv
[idx_ipv4
]->arg
, &su
);
3019 json_object
*json_no
= NULL
;
3020 json_no
= json_object_new_object();
3021 json_object_string_add(json_no
, "warning",
3022 "Malformed address");
3023 vty_out(vty
, "%s\n",
3024 json_object_to_json_string(json_no
));
3025 json_object_free(json_no
);
3027 vty_out(vty
, "Malformed address: %s\n",
3028 argv
[idx_ipv4
]->arg
);
3032 peer
= peer_lookup(NULL
, &su
);
3033 if (!peer
|| !peer
->afc
[afi
][SAFI_MPLS_VPN
]) {
3035 json_object
*json_no
= NULL
;
3036 json_no
= json_object_new_object();
3037 json_object_string_add(
3039 "No such neighbor or address family");
3040 vty_out(vty
, "%s\n",
3041 json_object_to_json_string(json_no
));
3042 json_object_free(json_no
);
3045 "%% No such neighbor or address family\n");
3049 return bgp_show_mpls_vpn(vty
, afi
, NULL
, bgp_show_type_neighbor
,
3055 DEFUN (show_ip_bgp_vpn_rd_neighbor_routes
,
3056 show_ip_bgp_vpn_rd_neighbor_routes_cmd
,
3057 "show [ip] bgp <vpnv4|vpnv6> rd <ASN:NN_OR_IP-ADDRESS:NN|all> neighbors A.B.C.D routes [json]",
3062 "Display information for a route distinguisher\n"
3063 "VPN Route Distinguisher\n"
3064 "All VPN Route Distinguishers\n"
3065 "Detailed information on TCP and BGP neighbor connections\n"
3066 "Neighbor to display information about\n"
3067 "Display routes learned from neighbor\n"
3070 int idx_ext_community
= 5;
3075 struct prefix_rd prd
;
3076 bool prefix_rd_all
= false;
3077 bool uj
= use_json(argc
, argv
);
3081 if (argv_find_and_parse_vpnvx(argv
, argc
, &idx
, &afi
)) {
3082 if (!strcmp(argv
[idx_ext_community
]->arg
, "all"))
3083 prefix_rd_all
= true;
3085 ret
= str2prefix_rd(argv
[idx_ext_community
]->arg
, &prd
);
3088 json_object
*json_no
= NULL
;
3089 json_no
= json_object_new_object();
3090 json_object_string_add(
3092 "Malformed Route Distinguisher");
3093 vty_out(vty
, "%s\n",
3094 json_object_to_json_string(
3096 json_object_free(json_no
);
3099 "%% Malformed Route Distinguisher\n");
3104 ret
= str2sockunion(argv
[idx_ipv4
]->arg
, &su
);
3107 json_object
*json_no
= NULL
;
3108 json_no
= json_object_new_object();
3109 json_object_string_add(json_no
, "warning",
3110 "Malformed address");
3111 vty_out(vty
, "%s\n",
3112 json_object_to_json_string(json_no
));
3113 json_object_free(json_no
);
3115 vty_out(vty
, "Malformed address: %s\n",
3116 argv
[idx_ext_community
]->arg
);
3120 peer
= peer_lookup(NULL
, &su
);
3121 if (!peer
|| !peer
->afc
[afi
][SAFI_MPLS_VPN
]) {
3123 json_object
*json_no
= NULL
;
3124 json_no
= json_object_new_object();
3125 json_object_string_add(
3127 "No such neighbor or address family");
3128 vty_out(vty
, "%s\n",
3129 json_object_to_json_string(json_no
));
3130 json_object_free(json_no
);
3133 "%% No such neighbor or address family\n");
3138 return bgp_show_mpls_vpn(vty
, afi
, NULL
,
3139 bgp_show_type_neighbor
, &su
, 0,
3142 return bgp_show_mpls_vpn(vty
, afi
, &prd
,
3143 bgp_show_type_neighbor
, &su
, 0,
3149 DEFUN (show_ip_bgp_vpn_all_neighbor_advertised_routes
,
3150 show_ip_bgp_vpn_all_neighbor_advertised_routes_cmd
,
3151 "show [ip] bgp <vpnv4|vpnv6> all neighbors A.B.C.D advertised-routes [json]",
3156 "Display information about all VPNv4/VPNv6 NLRIs\n"
3157 "Detailed information on TCP and BGP neighbor connections\n"
3158 "Neighbor to display information about\n"
3159 "Display the routes advertised to a BGP neighbor\n"
3166 bool uj
= use_json(argc
, argv
);
3170 if (argv_find_and_parse_vpnvx(argv
, argc
, &idx
, &afi
)) {
3171 ret
= str2sockunion(argv
[idx_ipv4
]->arg
, &su
);
3174 json_object
*json_no
= NULL
;
3175 json_no
= json_object_new_object();
3176 json_object_string_add(json_no
, "warning",
3177 "Malformed address");
3178 vty_out(vty
, "%s\n",
3179 json_object_to_json_string(json_no
));
3180 json_object_free(json_no
);
3182 vty_out(vty
, "Malformed address: %s\n",
3183 argv
[idx_ipv4
]->arg
);
3186 peer
= peer_lookup(NULL
, &su
);
3187 if (!peer
|| !peer
->afc
[afi
][SAFI_MPLS_VPN
]) {
3189 json_object
*json_no
= NULL
;
3190 json_no
= json_object_new_object();
3191 json_object_string_add(
3193 "No such neighbor or address family");
3194 vty_out(vty
, "%s\n",
3195 json_object_to_json_string(json_no
));
3196 json_object_free(json_no
);
3199 "%% No such neighbor or address family\n");
3202 return show_adj_route_vpn(vty
, peer
, NULL
, AFI_IP
,
3208 DEFUN (show_ip_bgp_vpn_rd_neighbor_advertised_routes
,
3209 show_ip_bgp_vpn_rd_neighbor_advertised_routes_cmd
,
3210 "show [ip] bgp <vpnv4|vpnv6> rd <ASN:NN_OR_IP-ADDRESS:NN|all> neighbors A.B.C.D advertised-routes [json]",
3215 "Display information for a route distinguisher\n"
3216 "VPN Route Distinguisher\n"
3217 "All VPN Route Distinguishers\n"
3218 "Detailed information on TCP and BGP neighbor connections\n"
3219 "Neighbor to display information about\n"
3220 "Display the routes advertised to a BGP neighbor\n"
3223 int idx_ext_community
= 5;
3227 struct prefix_rd prd
;
3229 bool uj
= use_json(argc
, argv
);
3233 if (argv_find_and_parse_vpnvx(argv
, argc
, &idx
, &afi
)) {
3234 ret
= str2sockunion(argv
[idx_ipv4
]->arg
, &su
);
3237 json_object
*json_no
= NULL
;
3238 json_no
= json_object_new_object();
3239 json_object_string_add(json_no
, "warning",
3240 "Malformed address");
3241 vty_out(vty
, "%s\n",
3242 json_object_to_json_string(json_no
));
3243 json_object_free(json_no
);
3245 vty_out(vty
, "Malformed address: %s\n",
3246 argv
[idx_ext_community
]->arg
);
3249 peer
= peer_lookup(NULL
, &su
);
3250 if (!peer
|| !peer
->afc
[afi
][SAFI_MPLS_VPN
]) {
3252 json_object
*json_no
= NULL
;
3253 json_no
= json_object_new_object();
3254 json_object_string_add(
3256 "No such neighbor or address family");
3257 vty_out(vty
, "%s\n",
3258 json_object_to_json_string(json_no
));
3259 json_object_free(json_no
);
3262 "%% No such neighbor or address family\n");
3266 if (!strcmp(argv
[idx_ext_community
]->arg
, "all"))
3267 return show_adj_route_vpn(vty
, peer
, NULL
, AFI_IP
,
3269 ret
= str2prefix_rd(argv
[idx_ext_community
]->arg
, &prd
);
3272 json_object
*json_no
= NULL
;
3273 json_no
= json_object_new_object();
3274 json_object_string_add(
3276 "Malformed Route Distinguisher");
3277 vty_out(vty
, "%s\n",
3278 json_object_to_json_string(json_no
));
3279 json_object_free(json_no
);
3282 "%% Malformed Route Distinguisher\n");
3286 return show_adj_route_vpn(vty
, peer
, &prd
, AFI_IP
,
3291 #endif /* KEEP_OLD_VPN_COMMANDS */
3293 void bgp_mplsvpn_init(void)
3295 install_element(BGP_VPNV4_NODE
, &vpnv4_network_cmd
);
3296 install_element(BGP_VPNV4_NODE
, &vpnv4_network_route_map_cmd
);
3297 install_element(BGP_VPNV4_NODE
, &no_vpnv4_network_cmd
);
3299 install_element(BGP_VPNV6_NODE
, &vpnv6_network_cmd
);
3300 install_element(BGP_VPNV6_NODE
, &no_vpnv6_network_cmd
);
3302 install_element(VIEW_NODE
, &show_bgp_ip_vpn_all_rd_cmd
);
3303 install_element(VIEW_NODE
, &show_bgp_ip_vpn_rd_cmd
);
3304 #ifdef KEEP_OLD_VPN_COMMANDS
3305 install_element(VIEW_NODE
, &show_ip_bgp_vpn_rd_cmd
);
3306 install_element(VIEW_NODE
, &show_ip_bgp_vpn_all_cmd
);
3307 install_element(VIEW_NODE
, &show_ip_bgp_vpn_all_tags_cmd
);
3308 install_element(VIEW_NODE
, &show_ip_bgp_vpn_rd_tags_cmd
);
3309 install_element(VIEW_NODE
, &show_ip_bgp_vpn_all_neighbor_routes_cmd
);
3310 install_element(VIEW_NODE
, &show_ip_bgp_vpn_rd_neighbor_routes_cmd
);
3311 install_element(VIEW_NODE
,
3312 &show_ip_bgp_vpn_all_neighbor_advertised_routes_cmd
);
3313 install_element(VIEW_NODE
,
3314 &show_ip_bgp_vpn_rd_neighbor_advertised_routes_cmd
);
3315 #endif /* KEEP_OLD_VPN_COMMANDS */
3318 vrf_id_t
get_first_vrf_for_redirect_with_rt(struct ecommunity
*eckey
)
3320 struct listnode
*mnode
, *mnnode
;
3324 if (eckey
->unit_size
== IPV6_ECOMMUNITY_SIZE
)
3327 for (ALL_LIST_ELEMENTS(bm
->bgp
, mnode
, mnnode
, bgp
)) {
3328 struct ecommunity
*ec
;
3330 if (bgp
->inst_type
!= BGP_INSTANCE_TYPE_VRF
)
3333 ec
= bgp
->vpn_policy
[afi
].import_redirect_rtlist
;
3335 if (ec
&& eckey
->unit_size
!= ec
->unit_size
)
3338 if (ecommunity_include(ec
, eckey
))
3345 * The purpose of this function is to process leaks that were deferred
3346 * from earlier per-vrf configuration due to not-yet-existing default
3347 * vrf, in other words, configuration such as:
3349 * router bgp MMM vrf FOO
3350 * address-family ipv4 unicast
3352 * exit-address-family
3357 * This function gets called when the default instance ("router bgp NNN")
3360 void vpn_leak_postchange_all(void)
3362 struct listnode
*next
;
3364 struct bgp
*bgp_default
= bgp_get_default();
3366 assert(bgp_default
);
3368 /* First, do any exporting from VRFs to the single VPN RIB */
3369 for (ALL_LIST_ELEMENTS_RO(bm
->bgp
, next
, bgp
)) {
3371 if (bgp
->inst_type
!= BGP_INSTANCE_TYPE_VRF
)
3374 vpn_leak_postchange(
3375 BGP_VPN_POLICY_DIR_TOVPN
,
3380 vpn_leak_postchange(
3381 BGP_VPN_POLICY_DIR_TOVPN
,
3387 /* Now, do any importing to VRFs from the single VPN RIB */
3388 for (ALL_LIST_ELEMENTS_RO(bm
->bgp
, next
, bgp
)) {
3390 if (bgp
->inst_type
!= BGP_INSTANCE_TYPE_VRF
)
3393 vpn_leak_postchange(
3394 BGP_VPN_POLICY_DIR_FROMVPN
,
3399 vpn_leak_postchange(
3400 BGP_VPN_POLICY_DIR_FROMVPN
,
3407 /* When a bgp vrf instance is unconfigured, remove its routes
3408 * from the VPN table and this vrf could be importing routes from other
3409 * bgp vrf instnaces, unimport them.
3410 * VRF X and VRF Y are exporting routes to each other.
3411 * When VRF X is deleted, unimport its routes from all target vrfs,
3412 * also VRF Y should unimport its routes from VRF X table.
3413 * This will ensure VPN table is cleaned up appropriately.
3415 void bgp_vpn_leak_unimport(struct bgp
*from_bgp
)
3418 const char *tmp_name
;
3420 struct listnode
*node
, *next
;
3421 safi_t safi
= SAFI_UNICAST
;
3423 bool is_vrf_leak_bind
;
3426 if (from_bgp
->inst_type
!= BGP_INSTANCE_TYPE_VRF
)
3429 debug
= (BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
) |
3430 BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
));
3432 tmp_name
= from_bgp
->name
? from_bgp
->name
: VRF_DEFAULT_NAME
;
3434 for (afi
= 0; afi
< AFI_MAX
; ++afi
) {
3435 /* vrf leak is for IPv4 and IPv6 Unicast only */
3436 if (afi
!= AFI_IP
&& afi
!= AFI_IP6
)
3439 for (ALL_LIST_ELEMENTS_RO(bm
->bgp
, next
, to_bgp
)) {
3440 if (from_bgp
== to_bgp
)
3443 /* Unimport and remove source vrf from the
3444 * other vrfs import list.
3446 struct vpn_policy
*to_vpolicy
;
3448 is_vrf_leak_bind
= false;
3449 to_vpolicy
= &(to_bgp
->vpn_policy
[afi
]);
3450 for (ALL_LIST_ELEMENTS_RO(to_vpolicy
->import_vrf
, node
,
3452 if (strcmp(vname
, tmp_name
) == 0) {
3453 is_vrf_leak_bind
= true;
3457 /* skip this bgp instance as there is no leak to this
3460 if (!is_vrf_leak_bind
)
3464 zlog_debug("%s: unimport routes from %s to_bgp %s afi %s import vrfs count %u",
3465 __func__
, from_bgp
->name_pretty
,
3466 to_bgp
->name_pretty
, afi2str(afi
),
3467 to_vpolicy
->import_vrf
->count
);
3469 vrf_unimport_from_vrf(to_bgp
, from_bgp
, afi
, safi
);
3471 /* readd vrf name as unimport removes import vrf name
3472 * from the destination vrf's import list where the
3473 * `import vrf` configuration still exist.
3475 vname
= XSTRDUP(MTYPE_TMP
, tmp_name
);
3476 listnode_add(to_bgp
->vpn_policy
[afi
].import_vrf
,
3478 SET_FLAG(to_bgp
->af_flags
[afi
][safi
],
3479 BGP_CONFIG_VRF_TO_VRF_IMPORT
);
3481 /* If to_bgp exports its routes to the bgp vrf
3482 * which is being deleted, un-import the
3483 * to_bgp routes from VPN.
3485 for (ALL_LIST_ELEMENTS_RO(to_bgp
->vpn_policy
[afi
]
3488 if (strcmp(vname
, tmp_name
) == 0) {
3489 vrf_unimport_from_vrf(from_bgp
, to_bgp
,
3499 /* When a router bgp is configured, there could be a bgp vrf
3500 * instance importing routes from this newly configured
3501 * bgp vrf instance. Export routes from configured
3503 * VRF Y has import from bgp vrf x,
3504 * when a bgp vrf x instance is created, export its routes
3505 * to VRF Y instance.
3507 void bgp_vpn_leak_export(struct bgp
*from_bgp
)
3510 const char *export_name
;
3512 struct listnode
*node
, *next
;
3513 struct ecommunity
*ecom
;
3514 enum vpn_policy_direction idir
, edir
;
3515 safi_t safi
= SAFI_UNICAST
;
3519 debug
= (BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
) |
3520 BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
));
3522 idir
= BGP_VPN_POLICY_DIR_FROMVPN
;
3523 edir
= BGP_VPN_POLICY_DIR_TOVPN
;
3525 export_name
= from_bgp
->name
? from_bgp
->name
: VRF_DEFAULT_NAME
;
3527 for (afi
= 0; afi
< AFI_MAX
; ++afi
) {
3528 /* vrf leak is for IPv4 and IPv6 Unicast only */
3529 if (afi
!= AFI_IP
&& afi
!= AFI_IP6
)
3532 for (ALL_LIST_ELEMENTS_RO(bm
->bgp
, next
, to_bgp
)) {
3533 if (from_bgp
== to_bgp
)
3536 /* bgp instance has import list, check to see if newly
3537 * configured bgp instance is the list.
3539 struct vpn_policy
*to_vpolicy
;
3541 to_vpolicy
= &(to_bgp
->vpn_policy
[afi
]);
3542 for (ALL_LIST_ELEMENTS_RO(to_vpolicy
->import_vrf
,
3544 if (strcmp(vname
, export_name
) != 0)
3548 zlog_debug("%s: found from_bgp %s in to_bgp %s import list, import routes.",
3550 export_name
, to_bgp
->name_pretty
);
3552 ecom
= from_bgp
->vpn_policy
[afi
].rtlist
[edir
];
3553 /* remove import rt, it will be readded
3554 * as part of import from vrf.
3558 to_vpolicy
->rtlist
[idir
],
3559 (struct ecommunity_val
*)
3561 vrf_import_from_vrf(to_bgp
, from_bgp
,