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
;
1063 struct bgp_table
*table
;
1066 bpi_ultimate
= bgp_get_imported_bpi_ultimate(source_bpi
);
1067 table
= bgp_dest_table(bpi_ultimate
->net
);
1069 if (bpi
->extra
&& bpi
->extra
->bgp_orig
)
1070 bgp_nexthop
= bpi
->extra
->bgp_orig
;
1072 bgp_nexthop
= bgp_orig
;
1075 * No nexthop tracking for redistributed routes,
1076 * for static (i.e. coming from the bgp network statement or for
1077 * EVPN-imported routes that get leaked.
1079 if (bpi_ultimate
->sub_type
== BGP_ROUTE_REDISTRIBUTE
||
1080 is_pi_family_evpn(bpi_ultimate
))
1082 else if (bpi_ultimate
->type
== ZEBRA_ROUTE_BGP
&&
1083 bpi_ultimate
->sub_type
== BGP_ROUTE_STATIC
&& table
&&
1084 (table
->safi
== SAFI_UNICAST
||
1085 table
->safi
== SAFI_LABELED_UNICAST
)) {
1086 /* Routes from network statement */
1087 if (CHECK_FLAG(bgp_nexthop
->flags
, BGP_FLAG_IMPORT_CHECK
))
1088 nh_valid
= bgp_find_or_add_nexthop(
1089 to_bgp
, bgp_nexthop
, afi
, safi
, bpi_ultimate
,
1095 * TBD do we need to do anything about the
1096 * 'connected' parameter?
1098 nh_valid
= bgp_find_or_add_nexthop(to_bgp
, bgp_nexthop
, afi
,
1099 safi
, bpi
, NULL
, 0, p
);
1102 * If you are using SRv6 VPN instead of MPLS, it need to check
1103 * the SID allocation. If the sid is not allocated, the rib
1106 if (to_bgp
->srv6_enabled
&&
1107 (!new_attr
->srv6_l3vpn
&& !new_attr
->srv6_vpn
)) {
1112 zlog_debug("%s: %pFX nexthop is %svalid (in vrf %s)", __func__
,
1113 p
, (nh_valid
? "" : "not "),
1114 bgp_nexthop
->name_pretty
);
1120 * returns pointer to new bgp_path_info upon success
1122 static struct bgp_path_info
*
1123 leak_update(struct bgp
*to_bgp
, struct bgp_dest
*bn
,
1124 struct attr
*new_attr
, /* already interned */
1125 afi_t afi
, safi_t safi
, struct bgp_path_info
*source_bpi
,
1126 mpls_label_t
*label
, uint32_t num_labels
, struct bgp
*bgp_orig
,
1127 struct prefix
*nexthop_orig
, int nexthop_self_flag
, int debug
)
1129 const struct prefix
*p
= bgp_dest_get_prefix(bn
);
1130 struct bgp_path_info
*bpi
;
1131 struct bgp_path_info
*new;
1132 struct bgp_path_info_extra
*extra
;
1133 uint32_t num_sids
= 0;
1134 void *parent
= source_bpi
;
1136 if (new_attr
->srv6_l3vpn
|| new_attr
->srv6_vpn
)
1141 "%s: entry: leak-to=%s, p=%pBD, type=%d, sub_type=%d",
1142 __func__
, to_bgp
->name_pretty
, bn
, source_bpi
->type
,
1143 source_bpi
->sub_type
);
1146 * Routes that are redistributed into BGP from zebra do not get
1147 * nexthop tracking. However, if those routes are subsequently
1148 * imported to other RIBs within BGP, the leaked routes do not
1149 * carry the original BGP_ROUTE_REDISTRIBUTE sub_type. Therefore,
1150 * in order to determine if the route we are currently leaking
1151 * should have nexthop tracking, we must find the ultimate
1152 * parent so we can check its sub_type.
1154 * As of now, source_bpi may at most be a second-generation route
1155 * (only one hop back to ultimate parent for vrf-vpn-vrf scheme).
1156 * Using a loop here supports more complex intra-bgp import-export
1157 * schemes that could be implemented in the future.
1164 for (bpi
= bgp_dest_get_bgp_path_info(bn
); bpi
; bpi
= bpi
->next
) {
1165 if (bpi
->extra
&& bpi
->extra
->parent
== parent
)
1170 bool labelssame
= labels_same(bpi
, label
, num_labels
);
1172 if (CHECK_FLAG(source_bpi
->flags
, BGP_PATH_REMOVED
)
1173 && CHECK_FLAG(bpi
->flags
, BGP_PATH_REMOVED
)) {
1176 "%s: ->%s(s_flags: 0x%x b_flags: 0x%x): %pFX: Found route, being removed, not leaking",
1177 __func__
, to_bgp
->name_pretty
,
1178 source_bpi
->flags
, bpi
->flags
, p
);
1183 if (attrhash_cmp(bpi
->attr
, new_attr
) && labelssame
1184 && !CHECK_FLAG(bpi
->flags
, BGP_PATH_REMOVED
)) {
1186 bgp_attr_unintern(&new_attr
);
1189 "%s: ->%s: %pBD: Found route, no change",
1190 __func__
, to_bgp
->name_pretty
, bn
);
1194 /* If the RT was changed via extended communities as an
1195 * import/export list, we should withdraw implicitly the old
1197 * For instance, RT list was modified using route-maps:
1198 * route-map test permit 10
1199 * set extcommunity rt none
1201 if (CHECK_FLAG(bpi
->attr
->flag
,
1202 ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES
)) &&
1203 CHECK_FLAG(new_attr
->flag
,
1204 ATTR_FLAG_BIT(BGP_ATTR_EXT_COMMUNITIES
))) {
1205 if (!ecommunity_cmp(
1206 bgp_attr_get_ecommunity(bpi
->attr
),
1207 bgp_attr_get_ecommunity(new_attr
))) {
1208 vpn_leak_to_vrf_withdraw(to_bgp
, bpi
);
1209 bgp_aggregate_decrement(to_bgp
, p
, bpi
, afi
,
1211 bgp_path_info_delete(bn
, bpi
);
1215 /* attr is changed */
1216 bgp_path_info_set_flag(bn
, bpi
, BGP_PATH_ATTR_CHANGED
);
1218 /* Rewrite BGP route information. */
1219 if (CHECK_FLAG(bpi
->flags
, BGP_PATH_REMOVED
))
1220 bgp_path_info_restore(bn
, bpi
);
1222 bgp_aggregate_decrement(to_bgp
, p
, bpi
, afi
, safi
);
1223 bgp_attr_unintern(&bpi
->attr
);
1224 bpi
->attr
= new_attr
;
1225 bpi
->uptime
= monotime(NULL
);
1231 setlabels(bpi
, label
, num_labels
);
1237 if (new_attr
->srv6_l3vpn
) {
1238 setsids(bpi
, &new_attr
->srv6_l3vpn
->sid
,
1241 extra
= bgp_path_info_extra_get(bpi
);
1243 extra
->sid
[0].loc_block_len
=
1244 new_attr
->srv6_l3vpn
->loc_block_len
;
1245 extra
->sid
[0].loc_node_len
=
1246 new_attr
->srv6_l3vpn
->loc_node_len
;
1247 extra
->sid
[0].func_len
=
1248 new_attr
->srv6_l3vpn
->func_len
;
1249 extra
->sid
[0].arg_len
=
1250 new_attr
->srv6_l3vpn
->arg_len
;
1251 extra
->sid
[0].transposition_len
=
1252 new_attr
->srv6_l3vpn
->transposition_len
;
1253 extra
->sid
[0].transposition_offset
=
1254 new_attr
->srv6_l3vpn
1255 ->transposition_offset
;
1256 } else if (new_attr
->srv6_vpn
)
1257 setsids(bpi
, &new_attr
->srv6_vpn
->sid
,
1262 if (nexthop_self_flag
)
1263 bgp_path_info_set_flag(bn
, bpi
, BGP_PATH_ANNC_NH_SELF
);
1265 if (CHECK_FLAG(source_bpi
->flags
, BGP_PATH_ACCEPT_OWN
))
1266 bgp_path_info_set_flag(bn
, bpi
, BGP_PATH_ACCEPT_OWN
);
1268 if (leak_update_nexthop_valid(to_bgp
, bn
, new_attr
, afi
, safi
,
1269 source_bpi
, bpi
, bgp_orig
, p
,
1271 bgp_path_info_set_flag(bn
, bpi
, BGP_PATH_VALID
);
1273 bgp_path_info_unset_flag(bn
, bpi
, BGP_PATH_VALID
);
1275 /* Process change. */
1276 bgp_aggregate_increment(to_bgp
, p
, bpi
, afi
, safi
);
1277 bgp_process(to_bgp
, bn
, afi
, safi
);
1278 bgp_dest_unlock_node(bn
);
1281 zlog_debug("%s: ->%s: %pBD Found route, changed attr",
1282 __func__
, to_bgp
->name_pretty
, bn
);
1283 UNSET_FLAG(bpi
->attr
->nh_flag
, BGP_ATTR_NH_REFRESH
);
1288 if (CHECK_FLAG(source_bpi
->flags
, BGP_PATH_REMOVED
)) {
1291 "%s: ->%s(s_flags: 0x%x): %pFX: New route, being removed, not leaking",
1292 __func__
, to_bgp
->name_pretty
,
1293 source_bpi
->flags
, p
);
1298 new = info_make(ZEBRA_ROUTE_BGP
, BGP_ROUTE_IMPORTED
, 0,
1299 to_bgp
->peer_self
, new_attr
, bn
);
1301 if (source_bpi
->peer
) {
1302 extra
= bgp_path_info_extra_get(new);
1303 extra
->peer_orig
= peer_lock(source_bpi
->peer
);
1306 if (nexthop_self_flag
)
1307 bgp_path_info_set_flag(bn
, new, BGP_PATH_ANNC_NH_SELF
);
1309 if (CHECK_FLAG(source_bpi
->flags
, BGP_PATH_ACCEPT_OWN
))
1310 bgp_path_info_set_flag(bn
, new, BGP_PATH_ACCEPT_OWN
);
1312 bgp_path_info_extra_get(new);
1318 if (new_attr
->srv6_l3vpn
) {
1319 setsids(new, &new_attr
->srv6_l3vpn
->sid
, num_sids
);
1321 extra
= bgp_path_info_extra_get(new);
1323 extra
->sid
[0].loc_block_len
=
1324 new_attr
->srv6_l3vpn
->loc_block_len
;
1325 extra
->sid
[0].loc_node_len
=
1326 new_attr
->srv6_l3vpn
->loc_node_len
;
1327 extra
->sid
[0].func_len
= new_attr
->srv6_l3vpn
->func_len
;
1328 extra
->sid
[0].arg_len
= new_attr
->srv6_l3vpn
->arg_len
;
1329 extra
->sid
[0].transposition_len
=
1330 new_attr
->srv6_l3vpn
->transposition_len
;
1331 extra
->sid
[0].transposition_offset
=
1332 new_attr
->srv6_l3vpn
->transposition_offset
;
1333 } else if (new_attr
->srv6_vpn
)
1334 setsids(new, &new_attr
->srv6_vpn
->sid
, num_sids
);
1339 setlabels(new, label
, num_labels
);
1341 new->extra
->parent
= bgp_path_info_lock(parent
);
1343 (struct bgp_dest
*)((struct bgp_path_info
*)parent
)->net
);
1345 new->extra
->bgp_orig
= bgp_lock(bgp_orig
);
1347 new->extra
->nexthop_orig
= *nexthop_orig
;
1349 if (leak_update_nexthop_valid(to_bgp
, bn
, new_attr
, afi
, safi
,
1350 source_bpi
, new, bgp_orig
, p
, debug
))
1351 bgp_path_info_set_flag(bn
, new, BGP_PATH_VALID
);
1353 bgp_path_info_unset_flag(bn
, new, BGP_PATH_VALID
);
1355 bgp_aggregate_increment(to_bgp
, p
, new, afi
, safi
);
1356 bgp_path_info_add(bn
, new);
1358 bgp_dest_unlock_node(bn
);
1359 bgp_process(to_bgp
, bn
, afi
, safi
);
1362 zlog_debug("%s: ->%s: %pBD: Added new route", __func__
,
1363 to_bgp
->name_pretty
, bn
);
1368 /* cf vnc_import_bgp_add_route_mode_nvegroup() and add_vnc_route() */
1369 void vpn_leak_from_vrf_update(struct bgp
*to_bgp
, /* to */
1370 struct bgp
*from_bgp
, /* from */
1371 struct bgp_path_info
*path_vrf
) /* route */
1373 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
);
1374 const struct prefix
*p
= bgp_dest_get_prefix(path_vrf
->net
);
1375 afi_t afi
= family2afi(p
->family
);
1376 struct attr static_attr
= {0};
1377 struct attr
*new_attr
= NULL
;
1378 safi_t safi
= SAFI_MPLS_VPN
;
1379 mpls_label_t label_val
;
1381 struct bgp_dest
*bn
;
1382 const char *debugmsg
;
1383 int nexthop_self_flag
= 0;
1386 zlog_debug("%s: from vrf %s", __func__
, from_bgp
->name_pretty
);
1388 if (debug
&& bgp_attr_get_ecommunity(path_vrf
->attr
)) {
1389 char *s
= ecommunity_ecom2str(
1390 bgp_attr_get_ecommunity(path_vrf
->attr
),
1391 ECOMMUNITY_FORMAT_ROUTE_MAP
, 0);
1393 zlog_debug("%s: %s path_vrf->type=%d, EC{%s}", __func__
,
1394 from_bgp
->name
, path_vrf
->type
, s
);
1395 XFREE(MTYPE_ECOMMUNITY_STR
, s
);
1403 zlog_debug("%s: can't get afi of prefix", __func__
);
1407 /* Is this route exportable into the VPN table? */
1408 if (!is_route_injectable_into_vpn(path_vrf
))
1411 if (!vpn_leak_to_vpn_active(from_bgp
, afi
, &debugmsg
)) {
1413 zlog_debug("%s: %s skipping: %s", __func__
,
1414 from_bgp
->name
, debugmsg
);
1419 static_attr
= *path_vrf
->attr
;
1422 * route map handling
1424 if (from_bgp
->vpn_policy
[afi
].rmap
[BGP_VPN_POLICY_DIR_TOVPN
]) {
1425 struct bgp_path_info info
;
1426 route_map_result_t ret
;
1428 memset(&info
, 0, sizeof(info
));
1429 info
.peer
= to_bgp
->peer_self
;
1430 info
.attr
= &static_attr
;
1431 ret
= route_map_apply(from_bgp
->vpn_policy
[afi
]
1432 .rmap
[BGP_VPN_POLICY_DIR_TOVPN
],
1434 if (RMAP_DENYMATCH
== ret
) {
1435 bgp_attr_flush(&static_attr
); /* free any added parts */
1438 "%s: vrf %s route map \"%s\" says DENY, returning",
1439 __func__
, from_bgp
->name_pretty
,
1440 from_bgp
->vpn_policy
[afi
]
1441 .rmap
[BGP_VPN_POLICY_DIR_TOVPN
]
1447 if (debug
&& bgp_attr_get_ecommunity(&static_attr
)) {
1448 char *s
= ecommunity_ecom2str(
1449 bgp_attr_get_ecommunity(&static_attr
),
1450 ECOMMUNITY_FORMAT_ROUTE_MAP
, 0);
1452 zlog_debug("%s: post route map static_attr.ecommunity{%s}",
1454 XFREE(MTYPE_ECOMMUNITY_STR
, s
);
1458 * Add the vpn-policy rt-list
1460 struct ecommunity
*old_ecom
;
1461 struct ecommunity
*new_ecom
;
1463 /* Export with the 'from' instance's export RTs. */
1464 /* If doing VRF-to-VRF leaking, strip existing RTs first. */
1465 old_ecom
= bgp_attr_get_ecommunity(&static_attr
);
1467 new_ecom
= ecommunity_dup(old_ecom
);
1468 if (CHECK_FLAG(from_bgp
->af_flags
[afi
][SAFI_UNICAST
],
1469 BGP_CONFIG_VRF_TO_VRF_EXPORT
))
1470 ecommunity_strip_rts(new_ecom
);
1471 new_ecom
= ecommunity_merge(
1472 new_ecom
, from_bgp
->vpn_policy
[afi
]
1473 .rtlist
[BGP_VPN_POLICY_DIR_TOVPN
]);
1474 if (!old_ecom
->refcnt
)
1475 ecommunity_free(&old_ecom
);
1477 new_ecom
= ecommunity_dup(
1478 from_bgp
->vpn_policy
[afi
]
1479 .rtlist
[BGP_VPN_POLICY_DIR_TOVPN
]);
1481 bgp_attr_set_ecommunity(&static_attr
, new_ecom
);
1483 if (debug
&& bgp_attr_get_ecommunity(&static_attr
)) {
1484 char *s
= ecommunity_ecom2str(
1485 bgp_attr_get_ecommunity(&static_attr
),
1486 ECOMMUNITY_FORMAT_ROUTE_MAP
, 0);
1488 zlog_debug("%s: post merge static_attr.ecommunity{%s}",
1490 XFREE(MTYPE_ECOMMUNITY_STR
, s
);
1493 community_strip_accept_own(&static_attr
);
1496 /* if policy nexthop not set, use 0 */
1497 if (CHECK_FLAG(from_bgp
->vpn_policy
[afi
].flags
,
1498 BGP_VPN_POLICY_TOVPN_NEXTHOP_SET
)) {
1499 struct prefix
*nexthop
=
1500 &from_bgp
->vpn_policy
[afi
].tovpn_nexthop
;
1502 switch (nexthop
->family
) {
1504 /* prevent mp_nexthop_global_in <- self in bgp_route.c
1506 static_attr
.nexthop
.s_addr
= nexthop
->u
.prefix4
.s_addr
;
1508 static_attr
.mp_nexthop_global_in
= nexthop
->u
.prefix4
;
1509 static_attr
.mp_nexthop_len
= BGP_ATTR_NHLEN_IPV4
;
1513 static_attr
.mp_nexthop_global
= nexthop
->u
.prefix6
;
1514 static_attr
.mp_nexthop_len
= BGP_ATTR_NHLEN_IPV6_GLOBAL
;
1521 if (!CHECK_FLAG(from_bgp
->af_flags
[afi
][SAFI_UNICAST
],
1522 BGP_CONFIG_VRF_TO_VRF_EXPORT
)) {
1523 if (afi
== AFI_IP
&&
1524 !BGP_ATTR_NEXTHOP_AFI_IP6(path_vrf
->attr
)) {
1526 * For ipv4, copy to multiprotocol
1529 static_attr
.mp_nexthop_global_in
=
1530 static_attr
.nexthop
;
1531 static_attr
.mp_nexthop_len
=
1532 BGP_ATTR_NHLEN_IPV4
;
1534 * XXX Leave static_attr.nexthop
1538 ~ATTR_FLAG_BIT(BGP_ATTR_NEXT_HOP
);
1541 /* Update based on next-hop family to account for
1542 * RFC 5549 (BGP unnumbered) scenario. Note that
1543 * specific action is only needed for the case of
1544 * IPv4 nexthops as the attr has been copied
1548 && !BGP_ATTR_NEXTHOP_AFI_IP6(path_vrf
->attr
)) {
1549 static_attr
.mp_nexthop_global_in
.s_addr
=
1550 static_attr
.nexthop
.s_addr
;
1551 static_attr
.mp_nexthop_len
=
1552 BGP_ATTR_NHLEN_IPV4
;
1554 ATTR_FLAG_BIT(BGP_ATTR_NEXT_HOP
);
1557 nexthop_self_flag
= 1;
1560 label_val
= from_bgp
->vpn_policy
[afi
].tovpn_label
;
1561 if (label_val
== MPLS_LABEL_NONE
) {
1562 encode_label(MPLS_LABEL_IMPLICIT_NULL
, &label
);
1564 encode_label(label_val
, &label
);
1567 /* Set originator ID to "me" */
1568 SET_FLAG(static_attr
.flag
, ATTR_FLAG_BIT(BGP_ATTR_ORIGINATOR_ID
));
1569 static_attr
.originator_id
= to_bgp
->router_id
;
1571 /* Set SID for SRv6 VPN */
1572 if (from_bgp
->vpn_policy
[afi
].tovpn_sid_locator
) {
1573 struct srv6_locator_chunk
*locator
=
1574 from_bgp
->vpn_policy
[afi
].tovpn_sid_locator
;
1576 from_bgp
->vpn_policy
[afi
].tovpn_sid_transpose_label
,
1578 static_attr
.srv6_l3vpn
= XCALLOC(MTYPE_BGP_SRV6_L3VPN
,
1579 sizeof(struct bgp_attr_srv6_l3vpn
));
1580 static_attr
.srv6_l3vpn
->sid_flags
= 0x00;
1581 static_attr
.srv6_l3vpn
->endpoint_behavior
=
1583 ? (CHECK_FLAG(locator
->flags
, SRV6_LOCATOR_USID
)
1584 ? SRV6_ENDPOINT_BEHAVIOR_END_DT4_USID
1585 : SRV6_ENDPOINT_BEHAVIOR_END_DT4
)
1586 : (CHECK_FLAG(locator
->flags
, SRV6_LOCATOR_USID
)
1587 ? SRV6_ENDPOINT_BEHAVIOR_END_DT6_USID
1588 : SRV6_ENDPOINT_BEHAVIOR_END_DT6
);
1589 static_attr
.srv6_l3vpn
->loc_block_len
=
1590 from_bgp
->vpn_policy
[afi
]
1591 .tovpn_sid_locator
->block_bits_length
;
1592 static_attr
.srv6_l3vpn
->loc_node_len
=
1593 from_bgp
->vpn_policy
[afi
]
1594 .tovpn_sid_locator
->node_bits_length
;
1595 static_attr
.srv6_l3vpn
->func_len
=
1596 from_bgp
->vpn_policy
[afi
]
1597 .tovpn_sid_locator
->function_bits_length
;
1598 static_attr
.srv6_l3vpn
->arg_len
=
1599 from_bgp
->vpn_policy
[afi
]
1600 .tovpn_sid_locator
->argument_bits_length
;
1601 static_attr
.srv6_l3vpn
->transposition_len
=
1602 from_bgp
->vpn_policy
[afi
]
1603 .tovpn_sid_locator
->function_bits_length
;
1604 static_attr
.srv6_l3vpn
->transposition_offset
=
1605 from_bgp
->vpn_policy
[afi
]
1606 .tovpn_sid_locator
->block_bits_length
+
1607 from_bgp
->vpn_policy
[afi
]
1608 .tovpn_sid_locator
->node_bits_length
;
1610 memcpy(&static_attr
.srv6_l3vpn
->sid
,
1611 &from_bgp
->vpn_policy
[afi
]
1612 .tovpn_sid_locator
->prefix
.prefix
,
1613 sizeof(struct in6_addr
));
1614 } else if (from_bgp
->tovpn_sid_locator
) {
1615 struct srv6_locator_chunk
*locator
=
1616 from_bgp
->tovpn_sid_locator
;
1617 encode_label(from_bgp
->tovpn_sid_transpose_label
, &label
);
1618 static_attr
.srv6_l3vpn
=
1619 XCALLOC(MTYPE_BGP_SRV6_L3VPN
,
1620 sizeof(struct bgp_attr_srv6_l3vpn
));
1621 static_attr
.srv6_l3vpn
->sid_flags
= 0x00;
1622 static_attr
.srv6_l3vpn
->endpoint_behavior
=
1623 CHECK_FLAG(locator
->flags
, SRV6_LOCATOR_USID
)
1624 ? SRV6_ENDPOINT_BEHAVIOR_END_DT46_USID
1625 : SRV6_ENDPOINT_BEHAVIOR_END_DT46
;
1626 static_attr
.srv6_l3vpn
->loc_block_len
=
1627 from_bgp
->tovpn_sid_locator
->block_bits_length
;
1628 static_attr
.srv6_l3vpn
->loc_node_len
=
1629 from_bgp
->tovpn_sid_locator
->node_bits_length
;
1630 static_attr
.srv6_l3vpn
->func_len
=
1631 from_bgp
->tovpn_sid_locator
->function_bits_length
;
1632 static_attr
.srv6_l3vpn
->arg_len
=
1633 from_bgp
->tovpn_sid_locator
->argument_bits_length
;
1634 static_attr
.srv6_l3vpn
->transposition_len
=
1635 from_bgp
->tovpn_sid_locator
->function_bits_length
;
1636 static_attr
.srv6_l3vpn
->transposition_offset
=
1637 from_bgp
->tovpn_sid_locator
->block_bits_length
+
1638 from_bgp
->tovpn_sid_locator
->node_bits_length
;
1639 memcpy(&static_attr
.srv6_l3vpn
->sid
,
1640 &from_bgp
->tovpn_sid_locator
->prefix
.prefix
,
1641 sizeof(struct in6_addr
));
1645 new_attr
= bgp_attr_intern(
1646 &static_attr
); /* hashed refcounted everything */
1647 bgp_attr_flush(&static_attr
); /* free locally-allocated parts */
1649 if (debug
&& bgp_attr_get_ecommunity(new_attr
)) {
1650 char *s
= ecommunity_ecom2str(bgp_attr_get_ecommunity(new_attr
),
1651 ECOMMUNITY_FORMAT_ROUTE_MAP
, 0);
1653 zlog_debug("%s: new_attr->ecommunity{%s}", __func__
, s
);
1654 XFREE(MTYPE_ECOMMUNITY_STR
, s
);
1657 /* Now new_attr is an allocated interned attr */
1659 bn
= bgp_afi_node_get(to_bgp
->rib
[afi
][safi
], afi
, safi
, p
,
1660 &(from_bgp
->vpn_policy
[afi
].tovpn_rd
));
1662 struct bgp_path_info
*new_info
;
1665 leak_update(to_bgp
, bn
, new_attr
, afi
, safi
, path_vrf
, &label
,
1666 1, from_bgp
, NULL
, nexthop_self_flag
, debug
);
1669 * Routes actually installed in the vpn RIB must also be
1670 * offered to all vrfs (because now they originate from
1673 * Acceptance into other vrfs depends on rt-lists.
1674 * Originating vrf will not accept the looped back route
1675 * because of loop checking.
1678 vpn_leak_to_vrf_update(from_bgp
, new_info
, NULL
);
1681 void vpn_leak_from_vrf_withdraw(struct bgp
*to_bgp
, /* to */
1682 struct bgp
*from_bgp
, /* from */
1683 struct bgp_path_info
*path_vrf
) /* route */
1685 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
);
1686 const struct prefix
*p
= bgp_dest_get_prefix(path_vrf
->net
);
1687 afi_t afi
= family2afi(p
->family
);
1688 safi_t safi
= SAFI_MPLS_VPN
;
1689 struct bgp_path_info
*bpi
;
1690 struct bgp_dest
*bn
;
1691 const char *debugmsg
;
1695 "%s: entry: leak-from=%s, p=%pBD, type=%d, sub_type=%d",
1696 __func__
, from_bgp
->name_pretty
, path_vrf
->net
,
1697 path_vrf
->type
, path_vrf
->sub_type
);
1705 zlog_debug("%s: can't get afi of prefix", __func__
);
1709 /* Is this route exportable into the VPN table? */
1710 if (!is_route_injectable_into_vpn(path_vrf
))
1713 if (!vpn_leak_to_vpn_active(from_bgp
, afi
, &debugmsg
)) {
1715 zlog_debug("%s: skipping: %s", __func__
, debugmsg
);
1720 zlog_debug("%s: withdrawing (path_vrf=%p)", __func__
, path_vrf
);
1722 bn
= bgp_afi_node_get(to_bgp
->rib
[afi
][safi
], afi
, safi
, p
,
1723 &(from_bgp
->vpn_policy
[afi
].tovpn_rd
));
1729 * match original bpi imported from
1731 for (bpi
= bgp_dest_get_bgp_path_info(bn
); bpi
; bpi
= bpi
->next
) {
1732 if (bpi
->extra
&& bpi
->extra
->parent
== path_vrf
) {
1738 /* withdraw from looped vrfs as well */
1739 vpn_leak_to_vrf_withdraw(to_bgp
, bpi
);
1741 bgp_aggregate_decrement(to_bgp
, p
, bpi
, afi
, safi
);
1742 bgp_path_info_delete(bn
, bpi
);
1743 bgp_process(to_bgp
, bn
, afi
, safi
);
1745 bgp_dest_unlock_node(bn
);
1748 void vpn_leak_from_vrf_withdraw_all(struct bgp
*to_bgp
, struct bgp
*from_bgp
,
1751 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
);
1752 struct bgp_dest
*pdest
;
1753 safi_t safi
= SAFI_MPLS_VPN
;
1756 * Walk vpn table, delete bpi with bgp_orig == from_bgp
1758 for (pdest
= bgp_table_top(to_bgp
->rib
[afi
][safi
]); pdest
;
1759 pdest
= bgp_route_next(pdest
)) {
1761 struct bgp_table
*table
;
1762 struct bgp_dest
*bn
;
1763 struct bgp_path_info
*bpi
;
1765 /* This is the per-RD table of prefixes */
1766 table
= bgp_dest_get_bgp_table_info(pdest
);
1771 for (bn
= bgp_table_top(table
); bn
; bn
= bgp_route_next(bn
)) {
1772 bpi
= bgp_dest_get_bgp_path_info(bn
);
1774 zlog_debug("%s: looking at prefix %pBD",
1778 for (; bpi
; bpi
= bpi
->next
) {
1780 zlog_debug("%s: type %d, sub_type %d",
1781 __func__
, bpi
->type
,
1783 if (bpi
->sub_type
!= BGP_ROUTE_IMPORTED
)
1787 if ((struct bgp
*)bpi
->extra
->bgp_orig
==
1791 zlog_debug("%s: deleting it",
1793 /* withdraw from leak-to vrfs as well */
1794 vpn_leak_to_vrf_withdraw(to_bgp
, bpi
);
1795 bgp_aggregate_decrement(
1796 to_bgp
, bgp_dest_get_prefix(bn
),
1798 bgp_path_info_delete(bn
, bpi
);
1799 bgp_process(to_bgp
, bn
, afi
, safi
);
1806 void vpn_leak_from_vrf_update_all(struct bgp
*to_bgp
, struct bgp
*from_bgp
,
1809 struct bgp_dest
*bn
;
1810 struct bgp_path_info
*bpi
;
1811 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
);
1814 zlog_debug("%s: entry, afi=%d, vrf=%s", __func__
, afi
,
1815 from_bgp
->name_pretty
);
1817 for (bn
= bgp_table_top(from_bgp
->rib
[afi
][SAFI_UNICAST
]); bn
;
1818 bn
= bgp_route_next(bn
)) {
1821 zlog_debug("%s: node=%p", __func__
, bn
);
1823 for (bpi
= bgp_dest_get_bgp_path_info(bn
); bpi
;
1827 "%s: calling vpn_leak_from_vrf_update",
1829 vpn_leak_from_vrf_update(to_bgp
, from_bgp
, bpi
);
1834 static struct bgp
*bgp_lookup_by_rd(struct bgp_path_info
*bpi
,
1835 struct prefix_rd
*rd
, afi_t afi
)
1837 struct listnode
*node
, *nnode
;
1843 /* If ACCEPT_OWN is not enabled for this path - return. */
1844 if (!CHECK_FLAG(bpi
->flags
, BGP_PATH_ACCEPT_OWN
))
1847 for (ALL_LIST_ELEMENTS(bm
->bgp
, node
, nnode
, bgp
)) {
1848 if (bgp
->inst_type
!= BGP_INSTANCE_TYPE_VRF
)
1851 if (!CHECK_FLAG(bgp
->vpn_policy
[afi
].flags
,
1852 BGP_VPN_POLICY_TOVPN_RD_SET
))
1855 /* Check if we have source VRF by RD value */
1856 if (memcmp(&bgp
->vpn_policy
[afi
].tovpn_rd
.val
, rd
->val
,
1857 ECOMMUNITY_SIZE
) == 0)
1864 static bool vpn_leak_to_vrf_update_onevrf(struct bgp
*to_bgp
, /* to */
1865 struct bgp
*from_bgp
, /* from */
1866 struct bgp_path_info
*path_vpn
,
1867 struct prefix_rd
*prd
)
1869 const struct prefix
*p
= bgp_dest_get_prefix(path_vpn
->net
);
1870 afi_t afi
= family2afi(p
->family
);
1872 struct attr static_attr
= {0};
1873 struct attr
*new_attr
= NULL
;
1874 struct bgp_dest
*bn
;
1875 safi_t safi
= SAFI_UNICAST
;
1876 const char *debugmsg
;
1877 struct prefix nexthop_orig
;
1878 mpls_label_t
*pLabels
= NULL
;
1879 uint32_t num_labels
= 0;
1880 int nexthop_self_flag
= 1;
1881 struct bgp_path_info
*bpi_ultimate
= NULL
;
1882 struct bgp_path_info
*bpi
;
1883 int origin_local
= 0;
1884 struct bgp
*src_vrf
;
1885 struct interface
*ifp
;
1887 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
);
1890 * For VRF-2-VRF route-leaking,
1891 * the source will be the originating VRF.
1893 * If ACCEPT_OWN mechanism is enabled, then we SHOULD(?)
1894 * get the source VRF (BGP) by looking at the RD.
1896 struct bgp
*src_bgp
= bgp_lookup_by_rd(path_vpn
, prd
, afi
);
1898 if (path_vpn
->extra
&& path_vpn
->extra
->bgp_orig
)
1899 src_vrf
= path_vpn
->extra
->bgp_orig
;
1905 bn
= bgp_afi_node_get(to_bgp
->rib
[afi
][safi
], afi
, safi
, p
, NULL
);
1907 if (!vpn_leak_from_vpn_active(to_bgp
, afi
, &debugmsg
)) {
1909 zlog_debug("%s: skipping: %s", __func__
, debugmsg
);
1913 /* Check for intersection of route targets */
1914 if (!ecommunity_include(
1915 to_bgp
->vpn_policy
[afi
].rtlist
[BGP_VPN_POLICY_DIR_FROMVPN
],
1916 bgp_attr_get_ecommunity(path_vpn
->attr
))) {
1919 "from vpn (%s) to vrf (%s), skipping after no intersection of route targets",
1920 from_bgp
->name_pretty
, to_bgp
->name_pretty
);
1924 /* A route MUST NOT ever be accepted back into its source VRF, even if
1925 * it carries one or more RTs that match that VRF.
1927 if (prd
&& memcmp(&prd
->val
, &to_bgp
->vpn_policy
[afi
].tovpn_rd
.val
,
1928 ECOMMUNITY_SIZE
) == 0) {
1931 "%s: skipping import, match RD (%pRD) of src VRF (%s) and the prefix (%pFX)",
1932 __func__
, prd
, to_bgp
->name_pretty
, p
);
1938 zlog_debug("%s: updating RD %pRD, %pFX to vrf %s", __func__
,
1939 prd
, p
, to_bgp
->name_pretty
);
1942 static_attr
= *path_vpn
->attr
;
1944 struct ecommunity
*old_ecom
;
1945 struct ecommunity
*new_ecom
;
1947 /* If doing VRF-to-VRF leaking, strip RTs. */
1948 old_ecom
= bgp_attr_get_ecommunity(&static_attr
);
1949 if (old_ecom
&& CHECK_FLAG(to_bgp
->af_flags
[afi
][safi
],
1950 BGP_CONFIG_VRF_TO_VRF_IMPORT
)) {
1951 new_ecom
= ecommunity_dup(old_ecom
);
1952 ecommunity_strip_rts(new_ecom
);
1953 bgp_attr_set_ecommunity(&static_attr
, new_ecom
);
1955 if (new_ecom
->size
== 0) {
1956 ecommunity_free(&new_ecom
);
1957 bgp_attr_set_ecommunity(&static_attr
, NULL
);
1960 if (!old_ecom
->refcnt
)
1961 ecommunity_free(&old_ecom
);
1964 community_strip_accept_own(&static_attr
);
1966 for (bpi
= bgp_dest_get_bgp_path_info(bn
); bpi
; bpi
= bpi
->next
) {
1967 if (bpi
->extra
&& bpi
->extra
->parent
== path_vpn
)
1972 leak_update_nexthop_valid(to_bgp
, bn
, &static_attr
, afi
, safi
,
1973 path_vpn
, bpi
, src_vrf
, p
, debug
))
1974 SET_FLAG(static_attr
.nh_flag
, BGP_ATTR_NH_VALID
);
1976 UNSET_FLAG(static_attr
.nh_flag
, BGP_ATTR_NH_VALID
);
1979 * Nexthop: stash and clear
1981 * Nexthop is valid in context of VPN core, but not in destination vrf.
1982 * Stash it for later label resolution by vrf ingress path and then
1983 * overwrite with 0, i.e., "me", for the sake of vrf advertisement.
1985 uint8_t nhfamily
= NEXTHOP_FAMILY(path_vpn
->attr
->mp_nexthop_len
);
1987 memset(&nexthop_orig
, 0, sizeof(nexthop_orig
));
1988 nexthop_orig
.family
= nhfamily
;
1993 nexthop_orig
.u
.prefix4
= path_vpn
->attr
->mp_nexthop_global_in
;
1994 nexthop_orig
.prefixlen
= IPV4_MAX_BITLEN
;
1996 if (CHECK_FLAG(to_bgp
->af_flags
[afi
][safi
],
1997 BGP_CONFIG_VRF_TO_VRF_IMPORT
)) {
1998 static_attr
.nexthop
.s_addr
=
1999 nexthop_orig
.u
.prefix4
.s_addr
;
2001 static_attr
.mp_nexthop_global_in
=
2002 path_vpn
->attr
->mp_nexthop_global_in
;
2003 static_attr
.mp_nexthop_len
=
2004 path_vpn
->attr
->mp_nexthop_len
;
2006 static_attr
.flag
|= ATTR_FLAG_BIT(BGP_ATTR_NEXT_HOP
);
2010 nexthop_orig
.u
.prefix6
= path_vpn
->attr
->mp_nexthop_global
;
2011 nexthop_orig
.prefixlen
= IPV6_MAX_BITLEN
;
2013 if (CHECK_FLAG(to_bgp
->af_flags
[afi
][safi
],
2014 BGP_CONFIG_VRF_TO_VRF_IMPORT
)) {
2015 static_attr
.mp_nexthop_global
= nexthop_orig
.u
.prefix6
;
2020 if (static_attr
.nexthop
.s_addr
== INADDR_ANY
&&
2021 IN6_IS_ADDR_UNSPECIFIED(&static_attr
.mp_nexthop_global
)) {
2022 ifp
= if_get_vrf_loopback(src_vrf
->vrf_id
);
2024 static_attr
.nh_ifindex
= ifp
->ifindex
;
2025 } else if (static_attr
.nh_ifindex
)
2026 ifp
= if_lookup_by_index(static_attr
.nh_ifindex
,
2031 if (ifp
&& if_is_operative(ifp
))
2032 SET_FLAG(static_attr
.nh_flag
, BGP_ATTR_NH_IF_OPERSTATE
);
2034 UNSET_FLAG(static_attr
.nh_flag
, BGP_ATTR_NH_IF_OPERSTATE
);
2037 * route map handling
2039 if (to_bgp
->vpn_policy
[afi
].rmap
[BGP_VPN_POLICY_DIR_FROMVPN
]) {
2040 struct bgp_path_info info
;
2041 route_map_result_t ret
;
2043 memset(&info
, 0, sizeof(info
));
2044 info
.peer
= to_bgp
->peer_self
;
2045 info
.attr
= &static_attr
;
2046 info
.extra
= path_vpn
->extra
; /* Used for source-vrf filter */
2047 ret
= route_map_apply(to_bgp
->vpn_policy
[afi
]
2048 .rmap
[BGP_VPN_POLICY_DIR_FROMVPN
],
2050 if (RMAP_DENYMATCH
== ret
) {
2051 bgp_attr_flush(&static_attr
); /* free any added parts */
2054 "%s: vrf %s vpn-policy route map \"%s\" says DENY, returning",
2055 __func__
, to_bgp
->name_pretty
,
2056 to_bgp
->vpn_policy
[afi
]
2057 .rmap
[BGP_VPN_POLICY_DIR_FROMVPN
]
2062 * if route-map changed nexthop, don't nexthop-self on output
2064 if (!CHECK_FLAG(static_attr
.rmap_change_flags
,
2065 BATTR_RMAP_NEXTHOP_UNCHANGED
))
2066 nexthop_self_flag
= 0;
2069 new_attr
= bgp_attr_intern(&static_attr
);
2070 bgp_attr_flush(&static_attr
);
2072 bn
= bgp_afi_node_get(to_bgp
->rib
[afi
][safi
], afi
, safi
, p
, NULL
);
2075 * ensure labels are copied
2077 * However, there is a special case: if the route originated in
2078 * another local VRF (as opposed to arriving via VPN), then the
2079 * nexthop is reached by hairpinning through this router (me)
2080 * using IP forwarding only (no LSP). Therefore, the route
2081 * imported to the VRF should not have labels attached. Note
2082 * that nexthop tracking is also involved: eliminating the
2083 * labels for these routes enables the non-labeled nexthops
2084 * from the originating VRF to be considered valid for this route.
2086 if (!CHECK_FLAG(to_bgp
->af_flags
[afi
][safi
],
2087 BGP_CONFIG_VRF_TO_VRF_IMPORT
)) {
2088 /* work back to original route */
2089 bpi_ultimate
= bgp_get_imported_bpi_ultimate(path_vpn
);
2092 * if original route was unicast,
2093 * then it did not arrive over vpn
2095 if (bpi_ultimate
->net
) {
2096 struct bgp_table
*table
;
2098 table
= bgp_dest_table(bpi_ultimate
->net
);
2099 if (table
&& (table
->safi
== SAFI_UNICAST
))
2104 if (!origin_local
&& path_vpn
->extra
2105 && path_vpn
->extra
->num_labels
) {
2106 num_labels
= path_vpn
->extra
->num_labels
;
2107 if (num_labels
> BGP_MAX_LABELS
)
2108 num_labels
= BGP_MAX_LABELS
;
2109 pLabels
= path_vpn
->extra
->label
;
2114 zlog_debug("%s: pfx %pBD: num_labels %d", __func__
,
2115 path_vpn
->net
, num_labels
);
2117 leak_update(to_bgp
, bn
, new_attr
, afi
, safi
, path_vpn
, pLabels
,
2118 num_labels
, src_vrf
, &nexthop_orig
, nexthop_self_flag
,
2123 bool vpn_leak_to_vrf_update(struct bgp
*from_bgp
,
2124 struct bgp_path_info
*path_vpn
,
2125 struct prefix_rd
*prd
)
2127 struct listnode
*mnode
, *mnnode
;
2129 bool leak_success
= false;
2131 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
);
2134 zlog_debug("%s: start (path_vpn=%p)", __func__
, path_vpn
);
2136 /* Loop over VRFs */
2137 for (ALL_LIST_ELEMENTS(bm
->bgp
, mnode
, mnnode
, bgp
)) {
2139 if (!path_vpn
->extra
2140 || path_vpn
->extra
->bgp_orig
!= bgp
) { /* no loop */
2141 leak_success
|= vpn_leak_to_vrf_update_onevrf(
2142 bgp
, from_bgp
, path_vpn
, prd
);
2145 return leak_success
;
2148 void vpn_leak_to_vrf_withdraw(struct bgp
*from_bgp
, /* from */
2149 struct bgp_path_info
*path_vpn
) /* route */
2151 const struct prefix
*p
;
2153 safi_t safi
= SAFI_UNICAST
;
2155 struct listnode
*mnode
, *mnnode
;
2156 struct bgp_dest
*bn
;
2157 struct bgp_path_info
*bpi
;
2158 const char *debugmsg
;
2160 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
);
2163 zlog_debug("%s: entry: p=%pBD, type=%d, sub_type=%d", __func__
,
2164 path_vpn
->net
, path_vpn
->type
, path_vpn
->sub_type
);
2167 zlog_debug("%s: start (path_vpn=%p)", __func__
, path_vpn
);
2169 if (!path_vpn
->net
) {
2170 #ifdef ENABLE_BGP_VNC
2171 /* BGP_ROUTE_RFP routes do not have path_vpn->net set (yet) */
2172 if (path_vpn
->type
== ZEBRA_ROUTE_BGP
2173 && path_vpn
->sub_type
== BGP_ROUTE_RFP
) {
2180 "%s: path_vpn->net unexpectedly NULL, no prefix, bailing",
2185 p
= bgp_dest_get_prefix(path_vpn
->net
);
2186 afi
= family2afi(p
->family
);
2188 /* Loop over VRFs */
2189 for (ALL_LIST_ELEMENTS(bm
->bgp
, mnode
, mnnode
, bgp
)) {
2190 if (!vpn_leak_from_vpn_active(bgp
, afi
, &debugmsg
)) {
2192 zlog_debug("%s: skipping: %s", __func__
,
2197 /* Check for intersection of route targets */
2198 if (!ecommunity_include(
2199 bgp
->vpn_policy
[afi
]
2200 .rtlist
[BGP_VPN_POLICY_DIR_FROMVPN
],
2201 bgp_attr_get_ecommunity(path_vpn
->attr
))) {
2207 zlog_debug("%s: withdrawing from vrf %s", __func__
,
2210 bn
= bgp_afi_node_get(bgp
->rib
[afi
][safi
], afi
, safi
, p
, NULL
);
2212 for (bpi
= bgp_dest_get_bgp_path_info(bn
); bpi
;
2215 && (struct bgp_path_info
*)bpi
->extra
->parent
2223 zlog_debug("%s: deleting bpi %p", __func__
,
2225 bgp_aggregate_decrement(bgp
, p
, bpi
, afi
, safi
);
2226 bgp_path_info_delete(bn
, bpi
);
2227 bgp_process(bgp
, bn
, afi
, safi
);
2229 bgp_dest_unlock_node(bn
);
2233 void vpn_leak_to_vrf_withdraw_all(struct bgp
*to_bgp
, afi_t afi
)
2235 struct bgp_dest
*bn
;
2236 struct bgp_path_info
*bpi
;
2237 safi_t safi
= SAFI_UNICAST
;
2238 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
);
2241 zlog_debug("%s: entry", __func__
);
2243 * Walk vrf table, delete bpi with bgp_orig in a different vrf
2245 for (bn
= bgp_table_top(to_bgp
->rib
[afi
][safi
]); bn
;
2246 bn
= bgp_route_next(bn
)) {
2248 for (bpi
= bgp_dest_get_bgp_path_info(bn
); bpi
;
2250 if (bpi
->extra
&& bpi
->extra
->bgp_orig
!= to_bgp
&&
2251 bpi
->extra
->parent
&&
2252 is_pi_family_vpn(bpi
->extra
->parent
)) {
2255 bgp_aggregate_decrement(to_bgp
,
2256 bgp_dest_get_prefix(bn
),
2258 bgp_path_info_delete(bn
, bpi
);
2259 bgp_process(to_bgp
, bn
, afi
, safi
);
2265 void vpn_leak_to_vrf_update_all(struct bgp
*to_bgp
, struct bgp
*vpn_from
,
2268 struct bgp_dest
*pdest
;
2269 safi_t safi
= SAFI_MPLS_VPN
;
2276 for (pdest
= bgp_table_top(vpn_from
->rib
[afi
][safi
]); pdest
;
2277 pdest
= bgp_route_next(pdest
)) {
2278 struct bgp_table
*table
;
2279 struct bgp_dest
*bn
;
2280 struct bgp_path_info
*bpi
;
2282 /* This is the per-RD table of prefixes */
2283 table
= bgp_dest_get_bgp_table_info(pdest
);
2288 for (bn
= bgp_table_top(table
); bn
; bn
= bgp_route_next(bn
)) {
2290 for (bpi
= bgp_dest_get_bgp_path_info(bn
); bpi
;
2294 bpi
->extra
->bgp_orig
== to_bgp
)
2297 vpn_leak_to_vrf_update_onevrf(to_bgp
, vpn_from
,
2305 * This function is called for definition/deletion/change to a route-map
2307 static void vpn_policy_routemap_update(struct bgp
*bgp
, const char *rmap_name
)
2309 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_RMAP_EVENT
);
2311 struct route_map
*rmap
;
2313 if (bgp
->inst_type
!= BGP_INSTANCE_TYPE_DEFAULT
2314 && bgp
->inst_type
!= BGP_INSTANCE_TYPE_VRF
) {
2319 rmap
= route_map_lookup_by_name(rmap_name
); /* NULL if deleted */
2321 for (afi
= 0; afi
< AFI_MAX
; ++afi
) {
2323 if (bgp
->vpn_policy
[afi
].rmap_name
[BGP_VPN_POLICY_DIR_TOVPN
]
2324 && !strcmp(rmap_name
,
2325 bgp
->vpn_policy
[afi
]
2326 .rmap_name
[BGP_VPN_POLICY_DIR_TOVPN
])) {
2330 "%s: rmap \"%s\" matches vrf-policy tovpn for as %d afi %s",
2331 __func__
, rmap_name
, bgp
->as
,
2334 vpn_leak_prechange(BGP_VPN_POLICY_DIR_TOVPN
, afi
,
2335 bgp_get_default(), bgp
);
2337 zlog_debug("%s: after vpn_leak_prechange",
2340 /* in case of definition/deletion */
2341 bgp
->vpn_policy
[afi
].rmap
[BGP_VPN_POLICY_DIR_TOVPN
] =
2344 vpn_leak_postchange(BGP_VPN_POLICY_DIR_TOVPN
, afi
,
2345 bgp_get_default(), bgp
);
2348 zlog_debug("%s: after vpn_leak_postchange",
2352 if (bgp
->vpn_policy
[afi
].rmap_name
[BGP_VPN_POLICY_DIR_FROMVPN
]
2353 && !strcmp(rmap_name
,
2354 bgp
->vpn_policy
[afi
]
2355 .rmap_name
[BGP_VPN_POLICY_DIR_FROMVPN
])) {
2358 zlog_debug("%s: rmap \"%s\" matches vrf-policy fromvpn for as %d afi %s",
2359 __func__
, rmap_name
, bgp
->as
,
2363 vpn_leak_prechange(BGP_VPN_POLICY_DIR_FROMVPN
, afi
,
2364 bgp_get_default(), bgp
);
2366 /* in case of definition/deletion */
2367 bgp
->vpn_policy
[afi
].rmap
[BGP_VPN_POLICY_DIR_FROMVPN
] =
2370 vpn_leak_postchange(BGP_VPN_POLICY_DIR_FROMVPN
, afi
,
2371 bgp_get_default(), bgp
);
2376 /* This API is used during router-id change, reflect VPNs
2377 * auto RD and RT values and readvertise routes to VPN table.
2379 void vpn_handle_router_id_update(struct bgp
*bgp
, bool withdraw
,
2383 int debug
= (BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
)
2384 | BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
));
2386 const char *export_name
;
2387 char buf
[RD_ADDRSTRLEN
];
2388 struct bgp
*bgp_import
;
2389 struct listnode
*node
;
2390 struct ecommunity
*ecom
;
2391 enum vpn_policy_direction idir
, edir
;
2394 * Router-id change that is not explicitly configured
2395 * (a change from zebra, frr restart for example)
2396 * should not replace a configured vpn RD/RT.
2400 zlog_debug("%s: skipping non explicit router-id change",
2405 if (bgp
->inst_type
!= BGP_INSTANCE_TYPE_DEFAULT
2406 && bgp
->inst_type
!= BGP_INSTANCE_TYPE_VRF
)
2409 export_name
= bgp
->name
? bgp
->name
: VRF_DEFAULT_NAME
;
2410 idir
= BGP_VPN_POLICY_DIR_FROMVPN
;
2411 edir
= BGP_VPN_POLICY_DIR_TOVPN
;
2413 for (afi
= 0; afi
< AFI_MAX
; ++afi
) {
2414 if (!vpn_leak_to_vpn_active(bgp
, afi
, NULL
))
2418 vpn_leak_prechange(BGP_VPN_POLICY_DIR_TOVPN
,
2419 afi
, bgp_get_default(), bgp
);
2421 zlog_debug("%s: %s after to_vpn vpn_leak_prechange",
2422 __func__
, export_name
);
2424 /* Remove import RT from VRFs */
2425 ecom
= bgp
->vpn_policy
[afi
].rtlist
[edir
];
2426 for (ALL_LIST_ELEMENTS_RO(bgp
->vpn_policy
[afi
].
2427 export_vrf
, node
, vname
)) {
2428 if (strcmp(vname
, VRF_DEFAULT_NAME
) == 0)
2429 bgp_import
= bgp_get_default();
2431 bgp_import
= bgp_lookup_by_name(vname
);
2436 bgp_import
->vpn_policy
[afi
]
2438 (struct ecommunity_val
*)ecom
->val
);
2441 /* New router-id derive auto RD and RT and export
2444 form_auto_rd(bgp
->router_id
, bgp
->vrf_rd_id
,
2445 &bgp
->vrf_prd_auto
);
2446 bgp
->vpn_policy
[afi
].tovpn_rd
= bgp
->vrf_prd_auto
;
2447 prefix_rd2str(&bgp
->vpn_policy
[afi
].tovpn_rd
, buf
,
2450 /* free up pre-existing memory if any and allocate
2451 * the ecommunity attribute with new RD/RT
2453 if (bgp
->vpn_policy
[afi
].rtlist
[edir
])
2455 &bgp
->vpn_policy
[afi
].rtlist
[edir
]);
2456 bgp
->vpn_policy
[afi
].rtlist
[edir
] = ecommunity_str2com(
2457 buf
, ECOMMUNITY_ROUTE_TARGET
, 0);
2459 /* Update import_vrf rt_list */
2460 ecom
= bgp
->vpn_policy
[afi
].rtlist
[edir
];
2461 for (ALL_LIST_ELEMENTS_RO(bgp
->vpn_policy
[afi
].
2462 export_vrf
, node
, vname
)) {
2463 if (strcmp(vname
, VRF_DEFAULT_NAME
) == 0)
2464 bgp_import
= bgp_get_default();
2466 bgp_import
= bgp_lookup_by_name(vname
);
2469 if (bgp_import
->vpn_policy
[afi
].rtlist
[idir
])
2470 bgp_import
->vpn_policy
[afi
].rtlist
[idir
]
2472 bgp_import
->vpn_policy
[afi
]
2473 .rtlist
[idir
], ecom
);
2475 bgp_import
->vpn_policy
[afi
].rtlist
[idir
]
2476 = ecommunity_dup(ecom
);
2479 /* Update routes to VPN */
2480 vpn_leak_postchange(BGP_VPN_POLICY_DIR_TOVPN
,
2481 afi
, bgp_get_default(),
2484 zlog_debug("%s: %s after to_vpn vpn_leak_postchange",
2485 __func__
, export_name
);
2490 void vpn_policy_routemap_event(const char *rmap_name
)
2492 int debug
= BGP_DEBUG(vpn
, VPN_LEAK_RMAP_EVENT
);
2493 struct listnode
*mnode
, *mnnode
;
2497 zlog_debug("%s: entry", __func__
);
2499 if (bm
->bgp
== NULL
) /* may be called during cleanup */
2502 for (ALL_LIST_ELEMENTS(bm
->bgp
, mnode
, mnnode
, bgp
))
2503 vpn_policy_routemap_update(bgp
, rmap_name
);
2506 void vrf_import_from_vrf(struct bgp
*to_bgp
, struct bgp
*from_bgp
,
2507 afi_t afi
, safi_t safi
)
2509 const char *export_name
;
2510 enum vpn_policy_direction idir
, edir
;
2511 char *vname
, *tmp_name
;
2512 char buf
[RD_ADDRSTRLEN
];
2513 struct ecommunity
*ecom
;
2514 bool first_export
= false;
2516 struct listnode
*node
;
2517 bool is_inst_match
= false;
2519 export_name
= to_bgp
->name
? to_bgp
->name
: VRF_DEFAULT_NAME
;
2520 idir
= BGP_VPN_POLICY_DIR_FROMVPN
;
2521 edir
= BGP_VPN_POLICY_DIR_TOVPN
;
2523 debug
= (BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
) |
2524 BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
));
2527 * Cross-ref both VRFs. Also, note if this is the first time
2528 * any VRF is importing from "import_vrf".
2530 vname
= (from_bgp
->name
? XSTRDUP(MTYPE_TMP
, from_bgp
->name
)
2531 : XSTRDUP(MTYPE_TMP
, VRF_DEFAULT_NAME
));
2533 /* Check the import_vrf list of destination vrf for the source vrf name,
2536 for (ALL_LIST_ELEMENTS_RO(to_bgp
->vpn_policy
[afi
].import_vrf
,
2538 if (strcmp(vname
, tmp_name
) == 0) {
2539 is_inst_match
= true;
2544 listnode_add(to_bgp
->vpn_policy
[afi
].import_vrf
,
2547 XFREE(MTYPE_TMP
, vname
);
2549 /* Check if the source vrf already exports to any vrf,
2550 * first time export requires to setup auto derived RD/RT values.
2551 * Add the destination vrf name to export vrf list if it is
2554 is_inst_match
= false;
2555 vname
= XSTRDUP(MTYPE_TMP
, export_name
);
2556 if (!listcount(from_bgp
->vpn_policy
[afi
].export_vrf
)) {
2557 first_export
= true;
2559 for (ALL_LIST_ELEMENTS_RO(from_bgp
->vpn_policy
[afi
].export_vrf
,
2561 if (strcmp(vname
, tmp_name
) == 0) {
2562 is_inst_match
= true;
2568 listnode_add(from_bgp
->vpn_policy
[afi
].export_vrf
,
2571 XFREE(MTYPE_TMP
, vname
);
2573 /* Update import RT for current VRF using export RT of the VRF we're
2574 * importing from. First though, make sure "import_vrf" has that
2578 form_auto_rd(from_bgp
->router_id
, from_bgp
->vrf_rd_id
,
2579 &from_bgp
->vrf_prd_auto
);
2580 from_bgp
->vpn_policy
[afi
].tovpn_rd
= from_bgp
->vrf_prd_auto
;
2581 SET_FLAG(from_bgp
->vpn_policy
[afi
].flags
,
2582 BGP_VPN_POLICY_TOVPN_RD_SET
);
2583 prefix_rd2str(&from_bgp
->vpn_policy
[afi
].tovpn_rd
,
2585 from_bgp
->vpn_policy
[afi
].rtlist
[edir
] =
2586 ecommunity_str2com(buf
, ECOMMUNITY_ROUTE_TARGET
, 0);
2587 SET_FLAG(from_bgp
->af_flags
[afi
][safi
],
2588 BGP_CONFIG_VRF_TO_VRF_EXPORT
);
2589 from_bgp
->vpn_policy
[afi
].tovpn_label
=
2590 BGP_PREVENT_VRF_2_VRF_LEAK
;
2592 ecom
= from_bgp
->vpn_policy
[afi
].rtlist
[edir
];
2593 if (to_bgp
->vpn_policy
[afi
].rtlist
[idir
])
2594 to_bgp
->vpn_policy
[afi
].rtlist
[idir
] =
2595 ecommunity_merge(to_bgp
->vpn_policy
[afi
]
2596 .rtlist
[idir
], ecom
);
2598 to_bgp
->vpn_policy
[afi
].rtlist
[idir
] = ecommunity_dup(ecom
);
2599 SET_FLAG(to_bgp
->af_flags
[afi
][safi
], BGP_CONFIG_VRF_TO_VRF_IMPORT
);
2602 const char *from_name
;
2603 char *ecom1
, *ecom2
;
2605 from_name
= from_bgp
->name
? from_bgp
->name
:
2608 ecom1
= ecommunity_ecom2str(
2609 to_bgp
->vpn_policy
[afi
].rtlist
[idir
],
2610 ECOMMUNITY_FORMAT_ROUTE_MAP
, 0);
2612 ecom2
= ecommunity_ecom2str(
2613 to_bgp
->vpn_policy
[afi
].rtlist
[edir
],
2614 ECOMMUNITY_FORMAT_ROUTE_MAP
, 0);
2617 "%s from %s to %s first_export %u import-rt %s export-rt %s",
2618 __func__
, from_name
, export_name
, first_export
, ecom1
,
2621 ecommunity_strfree(&ecom1
);
2622 ecommunity_strfree(&ecom2
);
2625 /* Does "import_vrf" first need to export its routes or that
2626 * is already done and we just need to import those routes
2627 * from the global table?
2630 vpn_leak_postchange(edir
, afi
, bgp_get_default(), from_bgp
);
2632 vpn_leak_postchange(idir
, afi
, bgp_get_default(), to_bgp
);
2635 void vrf_unimport_from_vrf(struct bgp
*to_bgp
, struct bgp
*from_bgp
,
2636 afi_t afi
, safi_t safi
)
2638 const char *export_name
, *tmp_name
;
2639 enum vpn_policy_direction idir
, edir
;
2641 struct ecommunity
*ecom
= NULL
;
2642 struct listnode
*node
;
2645 export_name
= to_bgp
->name
? to_bgp
->name
: VRF_DEFAULT_NAME
;
2646 tmp_name
= from_bgp
->name
? from_bgp
->name
: VRF_DEFAULT_NAME
;
2647 idir
= BGP_VPN_POLICY_DIR_FROMVPN
;
2648 edir
= BGP_VPN_POLICY_DIR_TOVPN
;
2650 debug
= (BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
) |
2651 BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
));
2653 /* Were we importing from "import_vrf"? */
2654 for (ALL_LIST_ELEMENTS_RO(to_bgp
->vpn_policy
[afi
].import_vrf
, node
,
2656 if (strcmp(vname
, tmp_name
) == 0)
2661 * We do not check in the cli if the passed in bgp
2662 * instance is actually imported into us before
2663 * we call this function. As such if we do not
2664 * find this in the import_vrf list than
2665 * we just need to return safely.
2671 zlog_debug("%s from %s to %s", __func__
, tmp_name
, export_name
);
2673 /* Remove "import_vrf" from our import list. */
2674 listnode_delete(to_bgp
->vpn_policy
[afi
].import_vrf
, vname
);
2675 XFREE(MTYPE_TMP
, vname
);
2677 /* Remove routes imported from "import_vrf". */
2678 /* TODO: In the current logic, we have to first remove all
2679 * imported routes and then (if needed) import back routes
2681 vpn_leak_prechange(idir
, afi
, bgp_get_default(), to_bgp
);
2683 if (to_bgp
->vpn_policy
[afi
].import_vrf
->count
== 0) {
2684 if (!to_bgp
->vpn_policy
[afi
].rmap
[idir
])
2685 UNSET_FLAG(to_bgp
->af_flags
[afi
][safi
],
2686 BGP_CONFIG_VRF_TO_VRF_IMPORT
);
2687 if (to_bgp
->vpn_policy
[afi
].rtlist
[idir
])
2688 ecommunity_free(&to_bgp
->vpn_policy
[afi
].rtlist
[idir
]);
2690 ecom
= from_bgp
->vpn_policy
[afi
].rtlist
[edir
];
2692 ecommunity_del_val(to_bgp
->vpn_policy
[afi
].rtlist
[idir
],
2693 (struct ecommunity_val
*)ecom
->val
);
2694 vpn_leak_postchange(idir
, afi
, bgp_get_default(), to_bgp
);
2699 * So SA is assuming that since the ALL_LIST_ELEMENTS_RO
2700 * below is checking for NULL that export_vrf can be
2701 * NULL, consequently it is complaining( like a cabbage )
2702 * that we could dereference and crash in the listcount(..)
2704 * So make it happy, under protest, with liberty and justice
2707 assert(from_bgp
->vpn_policy
[afi
].export_vrf
);
2709 /* Remove us from "import_vrf's" export list. If no other VRF
2710 * is importing from "import_vrf", cleanup appropriately.
2712 for (ALL_LIST_ELEMENTS_RO(from_bgp
->vpn_policy
[afi
].export_vrf
,
2714 if (strcmp(vname
, export_name
) == 0)
2719 * If we have gotten to this point then the vname must
2720 * exist. If not, we are in a world of trouble and
2721 * have slag sitting around.
2723 * import_vrf and export_vrf must match in having
2724 * the in/out names as appropriate.
2725 * export_vrf list could have been cleaned up
2726 * as part of no router bgp source instnace.
2731 listnode_delete(from_bgp
->vpn_policy
[afi
].export_vrf
, vname
);
2732 XFREE(MTYPE_TMP
, vname
);
2734 if (!listcount(from_bgp
->vpn_policy
[afi
].export_vrf
)) {
2735 vpn_leak_prechange(edir
, afi
, bgp_get_default(), from_bgp
);
2736 ecommunity_free(&from_bgp
->vpn_policy
[afi
].rtlist
[edir
]);
2737 UNSET_FLAG(from_bgp
->af_flags
[afi
][safi
],
2738 BGP_CONFIG_VRF_TO_VRF_EXPORT
);
2739 memset(&from_bgp
->vpn_policy
[afi
].tovpn_rd
, 0,
2740 sizeof(struct prefix_rd
));
2741 UNSET_FLAG(from_bgp
->vpn_policy
[afi
].flags
,
2742 BGP_VPN_POLICY_TOVPN_RD_SET
);
2743 from_bgp
->vpn_policy
[afi
].tovpn_label
= MPLS_LABEL_NONE
;
2748 /* For testing purpose, static route of MPLS-VPN. */
2749 DEFUN (vpnv4_network
,
2751 "network A.B.C.D/M rd ASN:NN_OR_IP-ADDRESS:NN <tag|label> (0-1048575)",
2752 "Specify a network to announce via BGP\n"
2754 "Specify Route Distinguisher\n"
2755 "VPN Route Distinguisher\n"
2756 "VPN NLRI label (tag)\n"
2757 "VPN NLRI label (tag)\n"
2760 int idx_ipv4_prefixlen
= 1;
2761 int idx_ext_community
= 3;
2763 return bgp_static_set_safi(
2764 AFI_IP
, SAFI_MPLS_VPN
, vty
, argv
[idx_ipv4_prefixlen
]->arg
,
2765 argv
[idx_ext_community
]->arg
, argv
[idx_label
]->arg
, NULL
, 0,
2766 NULL
, NULL
, NULL
, NULL
);
2769 DEFUN (vpnv4_network_route_map
,
2770 vpnv4_network_route_map_cmd
,
2771 "network A.B.C.D/M rd ASN:NN_OR_IP-ADDRESS:NN <tag|label> (0-1048575) route-map RMAP_NAME",
2772 "Specify a network to announce via BGP\n"
2774 "Specify Route Distinguisher\n"
2775 "VPN Route Distinguisher\n"
2776 "VPN NLRI label (tag)\n"
2777 "VPN NLRI label (tag)\n"
2782 int idx_ipv4_prefixlen
= 1;
2783 int idx_ext_community
= 3;
2786 return bgp_static_set_safi(
2787 AFI_IP
, SAFI_MPLS_VPN
, vty
, argv
[idx_ipv4_prefixlen
]->arg
,
2788 argv
[idx_ext_community
]->arg
, argv
[idx_label
]->arg
,
2789 argv
[idx_word_2
]->arg
, 0, NULL
, NULL
, NULL
, NULL
);
2792 /* For testing purpose, static route of MPLS-VPN. */
2793 DEFUN (no_vpnv4_network
,
2794 no_vpnv4_network_cmd
,
2795 "no network A.B.C.D/M rd ASN:NN_OR_IP-ADDRESS:NN <tag|label> (0-1048575)",
2797 "Specify a network to announce via BGP\n"
2799 "Specify Route Distinguisher\n"
2800 "VPN Route Distinguisher\n"
2801 "VPN NLRI label (tag)\n"
2802 "VPN NLRI label (tag)\n"
2805 int idx_ipv4_prefixlen
= 2;
2806 int idx_ext_community
= 4;
2808 return bgp_static_unset_safi(AFI_IP
, SAFI_MPLS_VPN
, vty
,
2809 argv
[idx_ipv4_prefixlen
]->arg
,
2810 argv
[idx_ext_community
]->arg
,
2811 argv
[idx_label
]->arg
, 0, NULL
, NULL
, NULL
);
2814 DEFUN (vpnv6_network
,
2816 "network X:X::X:X/M rd ASN:NN_OR_IP-ADDRESS:NN <tag|label> (0-1048575) [route-map RMAP_NAME]",
2817 "Specify a network to announce via BGP\n"
2818 "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n"
2819 "Specify Route Distinguisher\n"
2820 "VPN Route Distinguisher\n"
2821 "VPN NLRI label (tag)\n"
2822 "VPN NLRI label (tag)\n"
2827 int idx_ipv6_prefix
= 1;
2828 int idx_ext_community
= 3;
2832 return bgp_static_set_safi(
2833 AFI_IP6
, SAFI_MPLS_VPN
, vty
, argv
[idx_ipv6_prefix
]->arg
,
2834 argv
[idx_ext_community
]->arg
, argv
[idx_label
]->arg
,
2835 argv
[idx_word_2
]->arg
, 0, NULL
, NULL
, NULL
, NULL
);
2837 return bgp_static_set_safi(
2838 AFI_IP6
, SAFI_MPLS_VPN
, vty
, argv
[idx_ipv6_prefix
]->arg
,
2839 argv
[idx_ext_community
]->arg
, argv
[idx_label
]->arg
,
2840 NULL
, 0, NULL
, NULL
, NULL
, NULL
);
2843 /* For testing purpose, static route of MPLS-VPN. */
2844 DEFUN (no_vpnv6_network
,
2845 no_vpnv6_network_cmd
,
2846 "no network X:X::X:X/M rd ASN:NN_OR_IP-ADDRESS:NN <tag|label> (0-1048575)",
2848 "Specify a network to announce via BGP\n"
2849 "IPv6 prefix <network>/<length>, e.g., 3ffe::/16\n"
2850 "Specify Route Distinguisher\n"
2851 "VPN Route Distinguisher\n"
2852 "VPN NLRI label (tag)\n"
2853 "VPN NLRI label (tag)\n"
2856 int idx_ipv6_prefix
= 2;
2857 int idx_ext_community
= 4;
2859 return bgp_static_unset_safi(AFI_IP6
, SAFI_MPLS_VPN
, vty
,
2860 argv
[idx_ipv6_prefix
]->arg
,
2861 argv
[idx_ext_community
]->arg
,
2862 argv
[idx_label
]->arg
, 0, NULL
, NULL
, NULL
);
2865 int bgp_show_mpls_vpn(struct vty
*vty
, afi_t afi
, struct prefix_rd
*prd
,
2866 enum bgp_show_type type
, void *output_arg
, int tags
,
2870 struct bgp_table
*table
;
2871 uint16_t show_flags
= 0;
2874 SET_FLAG(show_flags
, BGP_SHOW_OPT_JSON
);
2876 bgp
= bgp_get_default();
2879 vty_out(vty
, "No BGP process is configured\n");
2881 vty_out(vty
, "{}\n");
2884 table
= bgp
->rib
[afi
][SAFI_MPLS_VPN
];
2885 return bgp_show_table_rd(vty
, bgp
, SAFI_MPLS_VPN
, table
, prd
, type
,
2886 output_arg
, show_flags
);
2889 DEFUN (show_bgp_ip_vpn_all_rd
,
2890 show_bgp_ip_vpn_all_rd_cmd
,
2891 "show bgp "BGP_AFI_CMD_STR
" vpn all [rd <ASN:NN_OR_IP-ADDRESS:NN|all>] [json]",
2895 "Display VPN NLRI specific information\n"
2896 "Display VPN NLRI specific information\n"
2897 "Display information for a route distinguisher\n"
2898 "VPN Route Distinguisher\n"
2899 "All VPN Route Distinguishers\n"
2903 struct prefix_rd prd
;
2907 if (argv_find_and_parse_afi(argv
, argc
, &idx
, &afi
)) {
2908 /* Constrain search if user supplies RD && RD != "all" */
2909 if (argv_find(argv
, argc
, "rd", &idx
)
2910 && strcmp(argv
[idx
+ 1]->arg
, "all")) {
2911 ret
= str2prefix_rd(argv
[idx
+ 1]->arg
, &prd
);
2914 "%% Malformed Route Distinguisher\n");
2917 return bgp_show_mpls_vpn(vty
, afi
, &prd
,
2918 bgp_show_type_normal
, NULL
, 0,
2919 use_json(argc
, argv
));
2921 return bgp_show_mpls_vpn(vty
, afi
, NULL
,
2922 bgp_show_type_normal
, NULL
, 0,
2923 use_json(argc
, argv
));
2929 ALIAS(show_bgp_ip_vpn_all_rd
,
2930 show_bgp_ip_vpn_rd_cmd
,
2931 "show bgp "BGP_AFI_CMD_STR
" vpn rd <ASN:NN_OR_IP-ADDRESS:NN|all> [json]",
2935 "Display VPN NLRI specific information\n"
2936 "Display information for a route distinguisher\n"
2937 "VPN Route Distinguisher\n"
2938 "All VPN Route Distinguishers\n"
2941 #ifdef KEEP_OLD_VPN_COMMANDS
2942 DEFUN (show_ip_bgp_vpn_rd
,
2943 show_ip_bgp_vpn_rd_cmd
,
2944 "show ip bgp "BGP_AFI_CMD_STR
" vpn rd <ASN:NN_OR_IP-ADDRESS:NN|all>",
2950 "Display information for a route distinguisher\n"
2951 "VPN Route Distinguisher\n"
2952 "All VPN Route Distinguishers\n")
2954 int idx_ext_community
= argc
- 1;
2956 struct prefix_rd prd
;
2960 if (argv_find_and_parse_vpnvx(argv
, argc
, &idx
, &afi
)) {
2961 if (!strcmp(argv
[idx_ext_community
]->arg
, "all"))
2962 return bgp_show_mpls_vpn(vty
, afi
, NULL
,
2963 bgp_show_type_normal
, NULL
, 0,
2965 ret
= str2prefix_rd(argv
[idx_ext_community
]->arg
, &prd
);
2967 vty_out(vty
, "%% Malformed Route Distinguisher\n");
2970 return bgp_show_mpls_vpn(vty
, afi
, &prd
, bgp_show_type_normal
,
2976 DEFUN (show_ip_bgp_vpn_all
,
2977 show_ip_bgp_vpn_all_cmd
,
2978 "show [ip] bgp <vpnv4|vpnv6>",
2987 if (argv_find_and_parse_vpnvx(argv
, argc
, &idx
, &afi
))
2988 return bgp_show_mpls_vpn(vty
, afi
, NULL
, bgp_show_type_normal
,
2993 DEFUN (show_ip_bgp_vpn_all_tags
,
2994 show_ip_bgp_vpn_all_tags_cmd
,
2995 "show [ip] bgp <vpnv4|vpnv6> all tags",
3000 "Display information about all VPNv4/VPNV6 NLRIs\n"
3001 "Display BGP tags for prefixes\n")
3006 if (argv_find_and_parse_vpnvx(argv
, argc
, &idx
, &afi
))
3007 return bgp_show_mpls_vpn(vty
, afi
, NULL
, bgp_show_type_normal
,
3012 DEFUN (show_ip_bgp_vpn_rd_tags
,
3013 show_ip_bgp_vpn_rd_tags_cmd
,
3014 "show [ip] bgp <vpnv4|vpnv6> rd <ASN:NN_OR_IP-ADDRESS:NN|all> tags",
3019 "Display information for a route distinguisher\n"
3020 "VPN Route Distinguisher\n"
3021 "All VPN Route Distinguishers\n"
3022 "Display BGP tags for prefixes\n")
3024 int idx_ext_community
= 5;
3026 struct prefix_rd prd
;
3030 if (argv_find_and_parse_vpnvx(argv
, argc
, &idx
, &afi
)) {
3031 if (!strcmp(argv
[idx_ext_community
]->arg
, "all"))
3032 return bgp_show_mpls_vpn(vty
, afi
, NULL
,
3033 bgp_show_type_normal
, NULL
, 1,
3035 ret
= str2prefix_rd(argv
[idx_ext_community
]->arg
, &prd
);
3037 vty_out(vty
, "%% Malformed Route Distinguisher\n");
3040 return bgp_show_mpls_vpn(vty
, afi
, &prd
, bgp_show_type_normal
,
3046 DEFUN (show_ip_bgp_vpn_all_neighbor_routes
,
3047 show_ip_bgp_vpn_all_neighbor_routes_cmd
,
3048 "show [ip] bgp <vpnv4|vpnv6> all neighbors A.B.C.D routes [json]",
3053 "Display information about all VPNv4/VPNv6 NLRIs\n"
3054 "Detailed information on TCP and BGP neighbor connections\n"
3055 "Neighbor to display information about\n"
3056 "Display routes learned from neighbor\n"
3063 bool uj
= use_json(argc
, argv
);
3067 if (argv_find_and_parse_vpnvx(argv
, argc
, &idx
, &afi
)) {
3068 ret
= str2sockunion(argv
[idx_ipv4
]->arg
, &su
);
3071 json_object
*json_no
= NULL
;
3072 json_no
= json_object_new_object();
3073 json_object_string_add(json_no
, "warning",
3074 "Malformed address");
3075 vty_out(vty
, "%s\n",
3076 json_object_to_json_string(json_no
));
3077 json_object_free(json_no
);
3079 vty_out(vty
, "Malformed address: %s\n",
3080 argv
[idx_ipv4
]->arg
);
3084 peer
= peer_lookup(NULL
, &su
);
3085 if (!peer
|| !peer
->afc
[afi
][SAFI_MPLS_VPN
]) {
3087 json_object
*json_no
= NULL
;
3088 json_no
= json_object_new_object();
3089 json_object_string_add(
3091 "No such neighbor or address family");
3092 vty_out(vty
, "%s\n",
3093 json_object_to_json_string(json_no
));
3094 json_object_free(json_no
);
3097 "%% No such neighbor or address family\n");
3101 return bgp_show_mpls_vpn(vty
, afi
, NULL
, bgp_show_type_neighbor
,
3107 DEFUN (show_ip_bgp_vpn_rd_neighbor_routes
,
3108 show_ip_bgp_vpn_rd_neighbor_routes_cmd
,
3109 "show [ip] bgp <vpnv4|vpnv6> rd <ASN:NN_OR_IP-ADDRESS:NN|all> neighbors A.B.C.D routes [json]",
3114 "Display information for a route distinguisher\n"
3115 "VPN Route Distinguisher\n"
3116 "All VPN Route Distinguishers\n"
3117 "Detailed information on TCP and BGP neighbor connections\n"
3118 "Neighbor to display information about\n"
3119 "Display routes learned from neighbor\n"
3122 int idx_ext_community
= 5;
3127 struct prefix_rd prd
;
3128 bool prefix_rd_all
= false;
3129 bool uj
= use_json(argc
, argv
);
3133 if (argv_find_and_parse_vpnvx(argv
, argc
, &idx
, &afi
)) {
3134 if (!strcmp(argv
[idx_ext_community
]->arg
, "all"))
3135 prefix_rd_all
= true;
3137 ret
= str2prefix_rd(argv
[idx_ext_community
]->arg
, &prd
);
3140 json_object
*json_no
= NULL
;
3141 json_no
= json_object_new_object();
3142 json_object_string_add(
3144 "Malformed Route Distinguisher");
3145 vty_out(vty
, "%s\n",
3146 json_object_to_json_string(
3148 json_object_free(json_no
);
3151 "%% Malformed Route Distinguisher\n");
3156 ret
= str2sockunion(argv
[idx_ipv4
]->arg
, &su
);
3159 json_object
*json_no
= NULL
;
3160 json_no
= json_object_new_object();
3161 json_object_string_add(json_no
, "warning",
3162 "Malformed address");
3163 vty_out(vty
, "%s\n",
3164 json_object_to_json_string(json_no
));
3165 json_object_free(json_no
);
3167 vty_out(vty
, "Malformed address: %s\n",
3168 argv
[idx_ext_community
]->arg
);
3172 peer
= peer_lookup(NULL
, &su
);
3173 if (!peer
|| !peer
->afc
[afi
][SAFI_MPLS_VPN
]) {
3175 json_object
*json_no
= NULL
;
3176 json_no
= json_object_new_object();
3177 json_object_string_add(
3179 "No such neighbor or address family");
3180 vty_out(vty
, "%s\n",
3181 json_object_to_json_string(json_no
));
3182 json_object_free(json_no
);
3185 "%% No such neighbor or address family\n");
3190 return bgp_show_mpls_vpn(vty
, afi
, NULL
,
3191 bgp_show_type_neighbor
, &su
, 0,
3194 return bgp_show_mpls_vpn(vty
, afi
, &prd
,
3195 bgp_show_type_neighbor
, &su
, 0,
3201 DEFUN (show_ip_bgp_vpn_all_neighbor_advertised_routes
,
3202 show_ip_bgp_vpn_all_neighbor_advertised_routes_cmd
,
3203 "show [ip] bgp <vpnv4|vpnv6> all neighbors A.B.C.D advertised-routes [json]",
3208 "Display information about all VPNv4/VPNv6 NLRIs\n"
3209 "Detailed information on TCP and BGP neighbor connections\n"
3210 "Neighbor to display information about\n"
3211 "Display the routes advertised to a BGP neighbor\n"
3218 bool uj
= use_json(argc
, argv
);
3222 if (argv_find_and_parse_vpnvx(argv
, argc
, &idx
, &afi
)) {
3223 ret
= str2sockunion(argv
[idx_ipv4
]->arg
, &su
);
3226 json_object
*json_no
= NULL
;
3227 json_no
= json_object_new_object();
3228 json_object_string_add(json_no
, "warning",
3229 "Malformed address");
3230 vty_out(vty
, "%s\n",
3231 json_object_to_json_string(json_no
));
3232 json_object_free(json_no
);
3234 vty_out(vty
, "Malformed address: %s\n",
3235 argv
[idx_ipv4
]->arg
);
3238 peer
= peer_lookup(NULL
, &su
);
3239 if (!peer
|| !peer
->afc
[afi
][SAFI_MPLS_VPN
]) {
3241 json_object
*json_no
= NULL
;
3242 json_no
= json_object_new_object();
3243 json_object_string_add(
3245 "No such neighbor or address family");
3246 vty_out(vty
, "%s\n",
3247 json_object_to_json_string(json_no
));
3248 json_object_free(json_no
);
3251 "%% No such neighbor or address family\n");
3254 return show_adj_route_vpn(vty
, peer
, NULL
, AFI_IP
,
3260 DEFUN (show_ip_bgp_vpn_rd_neighbor_advertised_routes
,
3261 show_ip_bgp_vpn_rd_neighbor_advertised_routes_cmd
,
3262 "show [ip] bgp <vpnv4|vpnv6> rd <ASN:NN_OR_IP-ADDRESS:NN|all> neighbors A.B.C.D advertised-routes [json]",
3267 "Display information for a route distinguisher\n"
3268 "VPN Route Distinguisher\n"
3269 "All VPN Route Distinguishers\n"
3270 "Detailed information on TCP and BGP neighbor connections\n"
3271 "Neighbor to display information about\n"
3272 "Display the routes advertised to a BGP neighbor\n"
3275 int idx_ext_community
= 5;
3279 struct prefix_rd prd
;
3281 bool uj
= use_json(argc
, argv
);
3285 if (argv_find_and_parse_vpnvx(argv
, argc
, &idx
, &afi
)) {
3286 ret
= str2sockunion(argv
[idx_ipv4
]->arg
, &su
);
3289 json_object
*json_no
= NULL
;
3290 json_no
= json_object_new_object();
3291 json_object_string_add(json_no
, "warning",
3292 "Malformed address");
3293 vty_out(vty
, "%s\n",
3294 json_object_to_json_string(json_no
));
3295 json_object_free(json_no
);
3297 vty_out(vty
, "Malformed address: %s\n",
3298 argv
[idx_ext_community
]->arg
);
3301 peer
= peer_lookup(NULL
, &su
);
3302 if (!peer
|| !peer
->afc
[afi
][SAFI_MPLS_VPN
]) {
3304 json_object
*json_no
= NULL
;
3305 json_no
= json_object_new_object();
3306 json_object_string_add(
3308 "No such neighbor or address family");
3309 vty_out(vty
, "%s\n",
3310 json_object_to_json_string(json_no
));
3311 json_object_free(json_no
);
3314 "%% No such neighbor or address family\n");
3318 if (!strcmp(argv
[idx_ext_community
]->arg
, "all"))
3319 return show_adj_route_vpn(vty
, peer
, NULL
, AFI_IP
,
3321 ret
= str2prefix_rd(argv
[idx_ext_community
]->arg
, &prd
);
3324 json_object
*json_no
= NULL
;
3325 json_no
= json_object_new_object();
3326 json_object_string_add(
3328 "Malformed Route Distinguisher");
3329 vty_out(vty
, "%s\n",
3330 json_object_to_json_string(json_no
));
3331 json_object_free(json_no
);
3334 "%% Malformed Route Distinguisher\n");
3338 return show_adj_route_vpn(vty
, peer
, &prd
, AFI_IP
,
3343 #endif /* KEEP_OLD_VPN_COMMANDS */
3345 void bgp_mplsvpn_init(void)
3347 install_element(BGP_VPNV4_NODE
, &vpnv4_network_cmd
);
3348 install_element(BGP_VPNV4_NODE
, &vpnv4_network_route_map_cmd
);
3349 install_element(BGP_VPNV4_NODE
, &no_vpnv4_network_cmd
);
3351 install_element(BGP_VPNV6_NODE
, &vpnv6_network_cmd
);
3352 install_element(BGP_VPNV6_NODE
, &no_vpnv6_network_cmd
);
3354 install_element(VIEW_NODE
, &show_bgp_ip_vpn_all_rd_cmd
);
3355 install_element(VIEW_NODE
, &show_bgp_ip_vpn_rd_cmd
);
3356 #ifdef KEEP_OLD_VPN_COMMANDS
3357 install_element(VIEW_NODE
, &show_ip_bgp_vpn_rd_cmd
);
3358 install_element(VIEW_NODE
, &show_ip_bgp_vpn_all_cmd
);
3359 install_element(VIEW_NODE
, &show_ip_bgp_vpn_all_tags_cmd
);
3360 install_element(VIEW_NODE
, &show_ip_bgp_vpn_rd_tags_cmd
);
3361 install_element(VIEW_NODE
, &show_ip_bgp_vpn_all_neighbor_routes_cmd
);
3362 install_element(VIEW_NODE
, &show_ip_bgp_vpn_rd_neighbor_routes_cmd
);
3363 install_element(VIEW_NODE
,
3364 &show_ip_bgp_vpn_all_neighbor_advertised_routes_cmd
);
3365 install_element(VIEW_NODE
,
3366 &show_ip_bgp_vpn_rd_neighbor_advertised_routes_cmd
);
3367 #endif /* KEEP_OLD_VPN_COMMANDS */
3370 vrf_id_t
get_first_vrf_for_redirect_with_rt(struct ecommunity
*eckey
)
3372 struct listnode
*mnode
, *mnnode
;
3376 if (eckey
->unit_size
== IPV6_ECOMMUNITY_SIZE
)
3379 for (ALL_LIST_ELEMENTS(bm
->bgp
, mnode
, mnnode
, bgp
)) {
3380 struct ecommunity
*ec
;
3382 if (bgp
->inst_type
!= BGP_INSTANCE_TYPE_VRF
)
3385 ec
= bgp
->vpn_policy
[afi
].import_redirect_rtlist
;
3387 if (ec
&& eckey
->unit_size
!= ec
->unit_size
)
3390 if (ecommunity_include(ec
, eckey
))
3397 * The purpose of this function is to process leaks that were deferred
3398 * from earlier per-vrf configuration due to not-yet-existing default
3399 * vrf, in other words, configuration such as:
3401 * router bgp MMM vrf FOO
3402 * address-family ipv4 unicast
3404 * exit-address-family
3409 * This function gets called when the default instance ("router bgp NNN")
3412 void vpn_leak_postchange_all(void)
3414 struct listnode
*next
;
3416 struct bgp
*bgp_default
= bgp_get_default();
3418 assert(bgp_default
);
3420 /* First, do any exporting from VRFs to the single VPN RIB */
3421 for (ALL_LIST_ELEMENTS_RO(bm
->bgp
, next
, bgp
)) {
3423 if (bgp
->inst_type
!= BGP_INSTANCE_TYPE_VRF
)
3426 vpn_leak_postchange(
3427 BGP_VPN_POLICY_DIR_TOVPN
,
3432 vpn_leak_postchange(
3433 BGP_VPN_POLICY_DIR_TOVPN
,
3439 /* Now, do any importing to VRFs from the single VPN RIB */
3440 for (ALL_LIST_ELEMENTS_RO(bm
->bgp
, next
, bgp
)) {
3442 if (bgp
->inst_type
!= BGP_INSTANCE_TYPE_VRF
)
3445 vpn_leak_postchange(
3446 BGP_VPN_POLICY_DIR_FROMVPN
,
3451 vpn_leak_postchange(
3452 BGP_VPN_POLICY_DIR_FROMVPN
,
3459 /* When a bgp vrf instance is unconfigured, remove its routes
3460 * from the VPN table and this vrf could be importing routes from other
3461 * bgp vrf instnaces, unimport them.
3462 * VRF X and VRF Y are exporting routes to each other.
3463 * When VRF X is deleted, unimport its routes from all target vrfs,
3464 * also VRF Y should unimport its routes from VRF X table.
3465 * This will ensure VPN table is cleaned up appropriately.
3467 void bgp_vpn_leak_unimport(struct bgp
*from_bgp
)
3470 const char *tmp_name
;
3472 struct listnode
*node
, *next
;
3473 safi_t safi
= SAFI_UNICAST
;
3475 bool is_vrf_leak_bind
;
3478 if (from_bgp
->inst_type
!= BGP_INSTANCE_TYPE_VRF
)
3481 debug
= (BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
) |
3482 BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
));
3484 tmp_name
= from_bgp
->name
? from_bgp
->name
: VRF_DEFAULT_NAME
;
3486 for (afi
= 0; afi
< AFI_MAX
; ++afi
) {
3487 /* vrf leak is for IPv4 and IPv6 Unicast only */
3488 if (afi
!= AFI_IP
&& afi
!= AFI_IP6
)
3491 for (ALL_LIST_ELEMENTS_RO(bm
->bgp
, next
, to_bgp
)) {
3492 if (from_bgp
== to_bgp
)
3495 /* Unimport and remove source vrf from the
3496 * other vrfs import list.
3498 struct vpn_policy
*to_vpolicy
;
3500 is_vrf_leak_bind
= false;
3501 to_vpolicy
= &(to_bgp
->vpn_policy
[afi
]);
3502 for (ALL_LIST_ELEMENTS_RO(to_vpolicy
->import_vrf
, node
,
3504 if (strcmp(vname
, tmp_name
) == 0) {
3505 is_vrf_leak_bind
= true;
3509 /* skip this bgp instance as there is no leak to this
3512 if (!is_vrf_leak_bind
)
3516 zlog_debug("%s: unimport routes from %s to_bgp %s afi %s import vrfs count %u",
3517 __func__
, from_bgp
->name_pretty
,
3518 to_bgp
->name_pretty
, afi2str(afi
),
3519 to_vpolicy
->import_vrf
->count
);
3521 vrf_unimport_from_vrf(to_bgp
, from_bgp
, afi
, safi
);
3523 /* readd vrf name as unimport removes import vrf name
3524 * from the destination vrf's import list where the
3525 * `import vrf` configuration still exist.
3527 vname
= XSTRDUP(MTYPE_TMP
, tmp_name
);
3528 listnode_add(to_bgp
->vpn_policy
[afi
].import_vrf
,
3530 SET_FLAG(to_bgp
->af_flags
[afi
][safi
],
3531 BGP_CONFIG_VRF_TO_VRF_IMPORT
);
3533 /* If to_bgp exports its routes to the bgp vrf
3534 * which is being deleted, un-import the
3535 * to_bgp routes from VPN.
3537 for (ALL_LIST_ELEMENTS_RO(to_bgp
->vpn_policy
[afi
]
3540 if (strcmp(vname
, tmp_name
) == 0) {
3541 vrf_unimport_from_vrf(from_bgp
, to_bgp
,
3551 /* When a router bgp is configured, there could be a bgp vrf
3552 * instance importing routes from this newly configured
3553 * bgp vrf instance. Export routes from configured
3555 * VRF Y has import from bgp vrf x,
3556 * when a bgp vrf x instance is created, export its routes
3557 * to VRF Y instance.
3559 void bgp_vpn_leak_export(struct bgp
*from_bgp
)
3562 const char *export_name
;
3564 struct listnode
*node
, *next
;
3565 struct ecommunity
*ecom
;
3566 enum vpn_policy_direction idir
, edir
;
3567 safi_t safi
= SAFI_UNICAST
;
3571 debug
= (BGP_DEBUG(vpn
, VPN_LEAK_TO_VRF
) |
3572 BGP_DEBUG(vpn
, VPN_LEAK_FROM_VRF
));
3574 idir
= BGP_VPN_POLICY_DIR_FROMVPN
;
3575 edir
= BGP_VPN_POLICY_DIR_TOVPN
;
3577 export_name
= from_bgp
->name
? from_bgp
->name
: VRF_DEFAULT_NAME
;
3579 for (afi
= 0; afi
< AFI_MAX
; ++afi
) {
3580 /* vrf leak is for IPv4 and IPv6 Unicast only */
3581 if (afi
!= AFI_IP
&& afi
!= AFI_IP6
)
3584 for (ALL_LIST_ELEMENTS_RO(bm
->bgp
, next
, to_bgp
)) {
3585 if (from_bgp
== to_bgp
)
3588 /* bgp instance has import list, check to see if newly
3589 * configured bgp instance is the list.
3591 struct vpn_policy
*to_vpolicy
;
3593 to_vpolicy
= &(to_bgp
->vpn_policy
[afi
]);
3594 for (ALL_LIST_ELEMENTS_RO(to_vpolicy
->import_vrf
,
3596 if (strcmp(vname
, export_name
) != 0)
3600 zlog_debug("%s: found from_bgp %s in to_bgp %s import list, import routes.",
3602 export_name
, to_bgp
->name_pretty
);
3604 ecom
= from_bgp
->vpn_policy
[afi
].rtlist
[edir
];
3605 /* remove import rt, it will be readded
3606 * as part of import from vrf.
3610 to_vpolicy
->rtlist
[idir
],
3611 (struct ecommunity_val
*)
3613 vrf_import_from_vrf(to_bgp
, from_bgp
,