2 * This is an implementation of Segment Routing
3 * as per draft-ietf-ospf-segment-routing-extensions-24
5 * Module name: Segment Routing
7 * Author: Anselme Sawadogo <anselmesawadogo@gmail.com>
8 * Author: Olivier Dugeon <olivier.dugeon@orange.com>
10 * Copyright (C) 2016 - 2017 Orange Labs http://www.orange.com
12 * This file is part of FRR.
14 * FRR is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2, or (at your option) any
19 * FRR is distributed in the hope that it will be useful, but
20 * WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 * General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with FRR; see the file COPYING. If not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
40 #include "libospf.h" /* for ospf interface types */
47 #include "sockunion.h" /* for inet_aton() */
54 #include "ospfd/ospfd.h"
55 #include "ospfd/ospf_interface.h"
56 #include "ospfd/ospf_ism.h"
57 #include "ospfd/ospf_asbr.h"
58 #include "ospfd/ospf_lsa.h"
59 #include "ospfd/ospf_lsdb.h"
60 #include "ospfd/ospf_neighbor.h"
61 #include "ospfd/ospf_nsm.h"
62 #include "ospfd/ospf_flood.h"
63 #include "ospfd/ospf_packet.h"
64 #include "ospfd/ospf_spf.h"
65 #include "ospfd/ospf_dump.h"
66 #include "ospfd/ospf_route.h"
67 #include "ospfd/ospf_ase.h"
68 #include "ospfd/ospf_sr.h"
69 #include "ospfd/ospf_ri.h"
70 #include "ospfd/ospf_ext.h"
71 #include "ospfd/ospf_zebra.h"
74 * Global variable to manage Segment Routing on this node.
75 * Note that all parameter values are stored in network byte order.
77 static struct ospf_sr_db OspfSR
;
78 static void ospf_sr_register_vty(void);
79 static inline void del_sid_nhlfe(struct sr_nhlfe nhlfe
);
82 * Segment Routing Data Base functions
85 /* Hash function for Segment Routing entry */
86 static unsigned int sr_hash(void *p
)
88 const struct in_addr
*rid
= p
;
90 return (jhash_1word(rid
->s_addr
, 0));
93 /* Compare 2 Router ID hash entries based on SR Node */
94 static int sr_cmp(const void *p1
, const void *p2
)
96 const struct sr_node
*srn
= p1
;
97 const struct in_addr
*rid
= p2
;
99 return (IPV4_ADDR_SAME(&srn
->adv_router
, rid
));
102 /* Functions to remove an SR Link */
103 static void del_sr_link(void *val
)
105 struct sr_link
*srl
= (struct sr_link
*)val
;
107 del_sid_nhlfe(srl
->nhlfe
[0]);
108 del_sid_nhlfe(srl
->nhlfe
[1]);
109 XFREE(MTYPE_OSPF_SR_PARAMS
, val
);
113 /* Functions to remove an SR Prefix */
114 static void del_sr_pref(void *val
)
116 struct sr_prefix
*srp
= (struct sr_prefix
*)val
;
118 del_sid_nhlfe(srp
->nhlfe
);
119 XFREE(MTYPE_OSPF_SR_PARAMS
, val
);
123 /* Allocate new Segment Routine node */
124 static struct sr_node
*sr_node_new(struct in_addr
*rid
)
132 /* Allocate Segment Routing node memory */
133 new = XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_node
));
138 "SR (ospf_sr_node_new):"
139 "Abort! can't create new SR node");
143 /* Default Algorithm, SRGB and MSD */
144 for (int i
= 0; i
< ALGORITHM_COUNT
; i
++)
145 new->algo
[i
] = SR_ALGORITHM_UNSET
;
147 new->srgb
.range_size
= 0;
148 new->srgb
.lower_bound
= 0;
151 /* Create Link, Prefix and Range TLVs list */
152 new->ext_link
= list_new();
153 new->ext_prefix
= list_new();
154 new->ext_link
->del
= del_sr_link
;
155 new->ext_prefix
->del
= del_sr_pref
;
157 /* Check if list are correctly created */
158 if (new->ext_link
== NULL
|| new->ext_prefix
== NULL
) {
159 list_delete_original(new->ext_link
);
160 list_delete_original(new->ext_prefix
);
161 XFREE(MTYPE_OSPF_SR_PARAMS
, new);
165 IPV4_ADDR_COPY(&new->adv_router
, rid
);
166 new->neighbor
= NULL
;
169 if (IS_DEBUG_OSPF_SR
)
170 zlog_debug(" |- Created new SR node for %s",
171 inet_ntoa(new->adv_router
));
175 /* Delete Segment Routing node */
176 static void sr_node_del(struct sr_node
*srn
)
182 /* Clean Extended Link */
183 list_delete_and_null(&srn
->ext_link
);
185 /* Clean Prefix List */
186 list_delete_and_null(&srn
->ext_prefix
);
188 XFREE(MTYPE_OSPF_SR_PARAMS
, srn
);
191 /* Get SR Node for a given nexthop */
192 static struct sr_node
*get_sr_node_by_nexthop(struct ospf
*ospf
,
193 struct in_addr nexthop
)
195 struct ospf_interface
*oi
= NULL
;
196 struct ospf_neighbor
*nbr
= NULL
;
197 struct listnode
*node
;
198 struct route_node
*rn
;
202 if (OspfSR
.neighbors
== NULL
)
205 if (IS_DEBUG_OSPF_SR
)
206 zlog_debug(" |- Search SR-Node for nexthop %s",
209 /* First, search neighbor Router ID for this nexthop */
210 for (ALL_LIST_ELEMENTS_RO(ospf
->oiflist
, node
, oi
))
211 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
))
212 if ((nbr
= rn
->info
))
218 if (IS_DEBUG_OSPF_SR
)
219 zlog_debug(" |- Found nexthop Router ID %s",
220 inet_ntoa(nbr
->router_id
));
221 /* Then, search SR Node */
222 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
, &nbr
->router_id
);
228 * Segment Routing Initialization functions
231 /* Segment Routing starter function */
232 static int ospf_sr_start(struct ospf
*ospf
)
234 struct route_node
*rn
;
235 struct ospf_lsa
*lsa
;
239 if (IS_DEBUG_OSPF_SR
)
240 zlog_debug("SR (ospf_sr_start): Start Segment Routing");
242 /* Initialize self SR Node */
243 srn
= hash_get(OspfSR
.neighbors
, (void *)&(ospf
->router_id
),
244 (void *)sr_node_new
);
250 /* Complete & Store self SR Node */
251 srn
->srgb
.range_size
= OspfSR
.srgb
.range_size
;
252 srn
->srgb
.lower_bound
= OspfSR
.srgb
.lower_bound
;
253 srn
->algo
[0] = OspfSR
.algo
[0];
254 srn
->msd
= OspfSR
.msd
;
257 if (IS_DEBUG_OSPF_EVENT
)
258 zlog_debug("SR (ospf_sr_start): Update SR-DB from LSDB");
260 /* Start by looking to Router Info & Extended LSA in lsdb */
261 if ((ospf
!= NULL
) && (ospf
->backbone
!= NULL
)) {
262 LSDB_LOOP(OPAQUE_AREA_LSDB(ospf
->backbone
), rn
, lsa
)
264 if (IS_LSA_MAXAGE(lsa
) || IS_LSA_SELF(lsa
))
267 GET_OPAQUE_TYPE(ntohl(lsa
->data
->id
.s_addr
));
269 case OPAQUE_TYPE_ROUTER_INFORMATION_LSA
:
270 ospf_sr_ri_lsa_update(lsa
);
272 case OPAQUE_TYPE_EXTENDED_PREFIX_LSA
:
273 ospf_sr_ext_prefix_lsa_update(lsa
);
275 case OPAQUE_TYPE_EXTENDED_LINK_LSA
:
276 ospf_sr_ext_link_lsa_update(lsa
);
288 /* Remove an SR Node in the SRDB */
289 static void ospf_sr_node_nhlfe_del(struct hash_backet
*backet
, void *args
)
291 struct sr_node
*srn
= (struct sr_node
*)backet
->data
;
292 struct listnode
*node
;
293 struct sr_prefix
*srp
;
300 if (IS_DEBUG_OSPF_SR
)
301 zlog_debug(" |- Delete all Prefix for SR Node %s",
302 inet_ntoa(srn
->adv_router
));
304 /* Remove Extended Prefix */
305 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
))
306 del_sid_nhlfe(srp
->nhlfe
);
308 if (IS_DEBUG_OSPF_SR
)
309 zlog_debug(" |- Delete all Link for SR Node %s",
310 inet_ntoa(srn
->adv_router
));
312 /* Remove Extended Link */
313 for (ALL_LIST_ELEMENTS_RO(srn
->ext_link
, node
, srl
)) {
314 /* Remove NHLFE entries for this Link */
315 del_sid_nhlfe(srl
->nhlfe
[0]);
316 del_sid_nhlfe(srl
->nhlfe
[1]);
319 if (IS_DEBUG_OSPF_SR
)
320 zlog_debug(" |- Remove SR Node %s",
321 inet_ntoa(srn
->adv_router
));
324 /* Stop Segment Routing */
325 static void ospf_sr_stop(void)
328 if (IS_DEBUG_OSPF_SR
)
329 zlog_debug("SR (ospf_sr_stop): Stop Segment Routing");
331 /* Start by removing all Prefix and Link for each SR Node */
332 hash_iterate(OspfSR
.neighbors
, (void (*)(struct hash_backet
*,
333 void *))ospf_sr_node_nhlfe_del
,
336 /* Finish by cleaning the hash table */
337 hash_clean(OspfSR
.neighbors
, (void *)sr_node_del
);
341 * Segment Routing initialize function
345 * @return 0 if OK, -1 otherwise
347 int ospf_sr_init(void)
351 zlog_info("SR (ospf_sr_init): Initialize SR Data Base");
353 memset(&OspfSR
, 0, sizeof(struct ospf_sr_db
));
354 OspfSR
.enabled
= false;
355 /* Only AREA flooding is supported in this release */
356 OspfSR
.scope
= OSPF_OPAQUE_AREA_LSA
;
358 /* Initialize SRGB, Algorithms and MSD TLVs */
359 /* Only Algorithm SPF is supported */
360 OspfSR
.algo
[0] = SR_ALGORITHM_SPF
;
361 for (int i
= 1; i
< ALGORITHM_COUNT
; i
++)
362 OspfSR
.algo
[i
] = SR_ALGORITHM_UNSET
;
364 OspfSR
.srgb
.range_size
= MPLS_DEFAULT_MAX_SRGB_SIZE
;
365 OspfSR
.srgb
.lower_bound
= MPLS_DEFAULT_MIN_SRGB_LABEL
;
366 OspfSR
.msd
= MPLS_MAX_LABELS
;
368 /* Initialize Hash table for neighbor SR nodes */
369 OspfSR
.neighbors
= hash_create(sr_hash
, sr_cmp
, "OSPF_SR");
370 if (OspfSR
.neighbors
== NULL
)
373 /* Initialize Route Table for prefix */
374 OspfSR
.prefix
= route_table_init();
375 if (OspfSR
.prefix
== NULL
)
378 /* Register Segment Routing VTY command */
379 ospf_sr_register_vty();
386 * Segment Routing termination function
392 void ospf_sr_term(void)
395 /* Stop Segment Routing */
398 /* Clear SR Node Table */
399 if (OspfSR
.neighbors
)
400 hash_free(OspfSR
.neighbors
);
402 /* Clear Prefix Table */
404 route_table_finish(OspfSR
.prefix
);
406 OspfSR
.enabled
= false;
410 * Following functions are used to manipulate the
411 * Next Hop Label Forwarding entry (NHLFE)
414 /* Compute label from index */
415 static mpls_label_t
index2label(u_int32_t index
, struct sr_srgb srgb
)
419 label
= srgb
.lower_bound
+ index
;
420 if (label
> (srgb
.lower_bound
+ srgb
.range_size
))
421 return MPLS_INVALID_LABEL
;
426 /* Get neighbor full structure from address */
427 static struct ospf_neighbor
*get_neighbor_by_addr(struct ospf
*top
,
430 struct ospf_neighbor
*nbr
;
431 struct ospf_interface
*oi
;
432 struct listnode
*node
;
433 struct route_node
*rn
;
439 for (ALL_LIST_ELEMENTS_RO(top
->oiflist
, node
, oi
))
440 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
))
441 if ((nbr
= rn
->info
))
442 if (IPV4_ADDR_SAME(&nbr
->address
.u
.prefix4
,
444 || IPV4_ADDR_SAME(&nbr
->router_id
, &addr
)) {
445 route_unlock_node(rn
);
452 /* Get OSPF Path from address */
453 static struct ospf_path
*get_nexthop_by_addr(struct ospf
*top
,
454 struct prefix_ipv4 p
)
456 struct ospf_route
* or ;
457 struct ospf_path
*path
;
458 struct listnode
*node
;
459 struct route_node
*rn
;
462 if ((top
== NULL
) && (top
->new_table
))
465 if (IS_DEBUG_OSPF_SR
)
466 zlog_debug(" |- Search Nexthop for prefix %s/%d",
467 inet_ntoa(p
.prefix
), p
.prefixlen
);
469 rn
= route_node_lookup(top
->new_table
, (struct prefix
*)&p
);
471 /* Check if we found an OSPF route. May be NULL if SPF has not
472 * yet populate routing table for this prefix. */
476 route_unlock_node(rn
);
478 if ((or = rn
->info
) == NULL
)
481 /* Then search path from this route */
482 for (ALL_LIST_ELEMENTS_RO(or->paths
, node
, path
))
483 if (path
->nexthop
.s_addr
!= INADDR_ANY
|| path
->ifindex
!= 0)
489 /* Compute NHLFE entry for Extended Link */
490 static int compute_link_nhlfe(struct sr_link
*srl
)
492 struct ospf
*top
= ospf_lookup_by_vrf_id(VRF_DEFAULT
);
493 struct ospf_neighbor
*nh
;
496 if (IS_DEBUG_OSPF_SR
)
497 zlog_debug(" |- Compute NHLFE for link %s/%d",
498 inet_ntoa(srl
->nhlfe
[0].prefv4
.prefix
),
499 srl
->nhlfe
[0].prefv4
.prefixlen
);
501 /* First determine the OSPF Neighbor */
502 nh
= get_neighbor_by_addr(top
, srl
->nhlfe
[0].nexthop
);
504 /* Neighbor could be not found when OSPF Adjacency just fire up
505 * because SPF don't yet populate routing table. This NHLFE will
506 * be fixed later when SR SPF schedule will be called.
511 if (IS_DEBUG_OSPF_SR
)
512 zlog_debug(" |- Found nexthop NHLFE %s",
513 inet_ntoa(nh
->router_id
));
515 /* Set ifindex for this neighbor */
516 srl
->nhlfe
[0].ifindex
= nh
->oi
->ifp
->ifindex
;
517 srl
->nhlfe
[1].ifindex
= nh
->oi
->ifp
->ifindex
;
519 /* Set Input & Output Label */
520 if (CHECK_FLAG(srl
->flags
[0], EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
521 srl
->nhlfe
[0].label_in
= srl
->sid
[0];
523 srl
->nhlfe
[0].label_in
=
524 index2label(srl
->sid
[0], srl
->srn
->srgb
);
525 if (CHECK_FLAG(srl
->flags
[1], EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
526 srl
->nhlfe
[1].label_in
= srl
->sid
[1];
528 srl
->nhlfe
[1].label_in
=
529 index2label(srl
->sid
[1], srl
->srn
->srgb
);
531 srl
->nhlfe
[0].label_out
= MPLS_IMP_NULL_LABEL
;
532 srl
->nhlfe
[1].label_out
= MPLS_IMP_NULL_LABEL
;
539 * Compute NHLFE entry for Extended Prefix
541 * @param srp - Segment Routing Prefix
543 * @return -1 if next hop is not found, 0 if nexthop has not changed
546 static int compute_prefix_nhlfe(struct sr_prefix
*srp
)
548 struct ospf
*top
= ospf_lookup_by_vrf_id(VRF_DEFAULT
);
549 struct ospf_path
*nh
= NULL
;
550 struct sr_node
*srnext
;
553 if (IS_DEBUG_OSPF_SR
)
554 zlog_debug(" |- Compute NHLFE for prefix %s/%d",
555 inet_ntoa(srp
->nhlfe
.prefv4
.prefix
),
556 srp
->nhlfe
.prefv4
.prefixlen
);
558 /* First determine the nexthop */
559 nh
= get_nexthop_by_addr(top
, srp
->nhlfe
.prefv4
);
561 /* Nexthop could be not found when OSPF Adjacency just fire up
562 * because SPF don't yet populate routing table. This NHLFE will
563 * be fixed later when SR SPF schedule will be called.
568 /* Check if NextHop has changed when call after running a new SPF */
569 if (IPV4_ADDR_SAME(&nh
->nexthop
, &srp
->nhlfe
.nexthop
)
570 && (nh
->ifindex
== srp
->nhlfe
.ifindex
))
573 if (IS_DEBUG_OSPF_SR
)
574 zlog_debug(" |- Found new next hop for this NHLFE: %s",
575 inet_ntoa(nh
->nexthop
));
577 /* Get SR-Node for this nexthop */
578 srnext
= get_sr_node_by_nexthop(top
, nh
->nexthop
);
579 /* and store this information for later SRGB update */
580 srnext
->neighbor
= OspfSR
.self
;
581 if (IPV4_ADDR_SAME(&srnext
->adv_router
, &srp
->adv_router
))
584 srp
->nexthop
= srnext
;
587 * SR Node could be known, but SRGB could be not initialize
588 * This is due to the fact that Extended Link / Prefix could
589 * be received before corresponding Router Information LSA
591 if ((srnext
== NULL
) || (srnext
->srgb
.lower_bound
== 0)
592 || (srnext
->srgb
.range_size
== 0))
595 if (IS_DEBUG_OSPF_SR
)
596 zlog_debug(" |- Found SRGB %d/%d for next hop SR-Node %s",
597 srnext
->srgb
.range_size
, srnext
->srgb
.lower_bound
,
598 inet_ntoa(srnext
->adv_router
));
600 /* Set ip addr & ifindex for this neighbor */
601 IPV4_ADDR_COPY(&srp
->nhlfe
.nexthop
, &nh
->nexthop
);
602 srp
->nhlfe
.ifindex
= nh
->ifindex
;
604 /* Compute Input Label with self SRGB */
605 srp
->nhlfe
.label_in
= index2label(srp
->sid
, OspfSR
.srgb
);
606 /* and Output Label with Next hop SR Node SRGB or Implicit Null label
607 * if next hop is the destination and request PHP */
608 if ((srp
->nexthop
== NULL
)
609 && (!CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
)))
610 srp
->nhlfe
.label_out
= MPLS_IMP_NULL_LABEL
;
611 else if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_VFLG
))
612 srp
->nhlfe
.label_out
= srp
->sid
;
614 srp
->nhlfe
.label_out
= index2label(srp
->sid
, srnext
->srgb
);
616 if (IS_DEBUG_OSPF_SR
)
617 zlog_debug(" |- Computed new labels in: %d out: %d",
618 srp
->nhlfe
.label_in
, srp
->nhlfe
.label_out
);
624 /* Send MPLS Label entry to Zebra for installation or deletion */
625 static int ospf_zebra_send_mpls_labels(int cmd
, struct sr_nhlfe nhlfe
)
633 zclient_create_header(s
, cmd
, VRF_DEFAULT
);
634 stream_putc(s
, ZEBRA_LSP_SR
);
635 /* OSPF Segment Routing currently support only IPv4 */
636 stream_putl(s
, nhlfe
.prefv4
.family
);
637 stream_put_in_addr(s
, &nhlfe
.prefv4
.prefix
);
638 stream_putc(s
, nhlfe
.prefv4
.prefixlen
);
639 stream_put_in_addr(s
, &nhlfe
.nexthop
);
640 stream_putl(s
, nhlfe
.ifindex
);
641 stream_putc(s
, OSPF_SR_PRIORITY_DEFAULT
);
642 stream_putl(s
, nhlfe
.label_in
);
643 stream_putl(s
, nhlfe
.label_out
);
645 /* Put length at the first point of the stream. */
646 stream_putw_at(s
, 0, stream_get_endp(s
));
648 if (IS_DEBUG_OSPF_SR
)
649 zlog_debug(" |- %s LSP %d/%d for %s/%d via %d",
650 cmd
== ZEBRA_MPLS_LABELS_ADD
? "Add" : "Delete",
651 nhlfe
.label_in
, nhlfe
.label_out
,
652 inet_ntoa(nhlfe
.prefv4
.prefix
),
653 nhlfe
.prefv4
.prefixlen
, nhlfe
.ifindex
);
655 return (zclient_send_message(zclient
));
658 /* Request zebra to install/remove FEC in FIB */
659 static int ospf_zebra_send_mpls_ftn(int cmd
, struct sr_nhlfe nhlfe
)
661 struct zapi_route api
;
662 struct zapi_nexthop
*api_nh
;
664 /* Support only IPv4 */
665 if (nhlfe
.prefv4
.family
!= AF_INET
)
668 memset(&api
, 0, sizeof(api
));
669 api
.vrf_id
= VRF_DEFAULT
;
670 api
.type
= ZEBRA_ROUTE_OSPF_SR
;
671 api
.safi
= SAFI_UNICAST
;
672 memcpy(&api
.prefix
, &nhlfe
.prefv4
, sizeof(struct prefix_ipv4
));
674 if (cmd
== ZEBRA_ROUTE_ADD
) {
676 SET_FLAG(api
.message
, ZAPI_MESSAGE_METRIC
);
677 api
.metric
= OSPF_SR_DEFAULT_METRIC
;
679 SET_FLAG(api
.message
, ZAPI_MESSAGE_NEXTHOP
);
680 api_nh
= &api
.nexthops
[0];
681 IPV4_ADDR_COPY(&api_nh
->gate
.ipv4
, &nhlfe
.nexthop
);
682 api_nh
->type
= NEXTHOP_TYPE_IPV4_IFINDEX
;
683 api_nh
->ifindex
= nhlfe
.ifindex
;
685 SET_FLAG(api
.message
, ZAPI_MESSAGE_LABEL
);
686 api_nh
->labels
[0] = nhlfe
.label_out
;
687 api_nh
->label_num
= 1;
691 if (IS_DEBUG_OSPF_SR
)
692 zlog_debug(" |- %s FEC %d for %s/%d via %d",
693 cmd
== ZEBRA_ROUTE_ADD
? "Add" : "Delete",
694 nhlfe
.label_out
, inet_ntoa(nhlfe
.prefv4
.prefix
),
695 nhlfe
.prefv4
.prefixlen
, nhlfe
.ifindex
);
697 return (zclient_route_send(cmd
, zclient
, &api
));
702 /* Add new NHLFE entry for SID */
703 static inline void add_sid_nhlfe(struct sr_nhlfe nhlfe
)
705 if ((nhlfe
.label_in
!= 0) && (nhlfe
.label_out
!= 0)) {
706 ospf_zebra_send_mpls_labels(ZEBRA_MPLS_LABELS_ADD
, nhlfe
);
707 if (nhlfe
.label_out
!= MPLS_IMP_NULL_LABEL
)
708 ospf_zebra_send_mpls_ftn(ZEBRA_ROUTE_ADD
, nhlfe
);
712 /* Remove NHLFE entry for SID */
713 static inline void del_sid_nhlfe(struct sr_nhlfe nhlfe
)
715 if ((nhlfe
.label_in
!= 0) && (nhlfe
.label_out
!= 0)) {
716 ospf_zebra_send_mpls_labels(ZEBRA_MPLS_LABELS_DELETE
, nhlfe
);
717 if (nhlfe
.label_out
!= MPLS_IMP_NULL_LABEL
)
718 ospf_zebra_send_mpls_ftn(ZEBRA_ROUTE_DELETE
, nhlfe
);
722 /* Update NHLFE entry for SID */
723 static inline void update_sid_nhlfe(struct sr_nhlfe n1
, struct sr_nhlfe n2
)
731 * Functions to parse and get Extended Link / Prefix
735 /* Extended Link SubTLVs Getter */
736 static struct sr_link
*get_ext_link_sid(struct tlv_header
*tlvh
)
740 struct ext_tlv_link
*link
= (struct ext_tlv_link
*)tlvh
;
741 struct ext_subtlv_adj_sid
*adj_sid
;
742 struct ext_subtlv_lan_adj_sid
*lan_sid
;
743 struct ext_subtlv_rmt_itf_addr
*rmt_itf
;
745 struct tlv_header
*sub_tlvh
;
746 u_int16_t length
= 0, sum
= 0, i
= 0;
748 srl
= XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_link
));
753 /* Initialize TLV browsing */
754 length
= ntohs(tlvh
->length
) - EXT_TLV_LINK_SIZE
;
755 sub_tlvh
= (struct tlv_header
*)((char *)(tlvh
) + TLV_HDR_SIZE
756 + EXT_TLV_LINK_SIZE
);
757 for (; sum
< length
; sub_tlvh
= TLV_HDR_NEXT(sub_tlvh
)) {
758 switch (ntohs(sub_tlvh
->type
)) {
759 case EXT_SUBTLV_ADJ_SID
:
760 adj_sid
= (struct ext_subtlv_adj_sid
*)sub_tlvh
;
762 i
= CHECK_FLAG(adj_sid
->flags
,
763 EXT_SUBTLV_LINK_ADJ_SID_BFLG
)
766 srl
->flags
[i
] = adj_sid
->flags
;
767 if (CHECK_FLAG(adj_sid
->flags
,
768 EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
769 srl
->sid
[i
] = GET_LABEL(ntohl(adj_sid
->value
));
771 srl
->sid
[i
] = ntohl(adj_sid
->value
);
772 IPV4_ADDR_COPY(&srl
->nhlfe
[i
].nexthop
, &link
->link_id
);
774 case EXT_SUBTLV_LAN_ADJ_SID
:
775 lan_sid
= (struct ext_subtlv_lan_adj_sid
*)sub_tlvh
;
776 srl
->type
= LAN_ADJ_SID
;
777 i
= CHECK_FLAG(lan_sid
->flags
,
778 EXT_SUBTLV_LINK_ADJ_SID_BFLG
)
781 srl
->flags
[i
] = lan_sid
->flags
;
782 if (CHECK_FLAG(lan_sid
->flags
,
783 EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
784 srl
->sid
[i
] = GET_LABEL(ntohl(lan_sid
->value
));
786 srl
->sid
[i
] = ntohl(lan_sid
->value
);
787 IPV4_ADDR_COPY(&srl
->nhlfe
[i
].nexthop
,
788 &lan_sid
->neighbor_id
);
790 case EXT_SUBTLV_RMT_ITF_ADDR
:
791 rmt_itf
= (struct ext_subtlv_rmt_itf_addr
*)sub_tlvh
;
792 IPV4_ADDR_COPY(&srl
->nhlfe
[0].nexthop
, &rmt_itf
->value
);
793 IPV4_ADDR_COPY(&srl
->nhlfe
[1].nexthop
, &rmt_itf
->value
);
798 sum
+= TLV_SIZE(sub_tlvh
);
801 IPV4_ADDR_COPY(&srl
->nhlfe
[0].prefv4
.prefix
, &link
->link_data
);
802 srl
->nhlfe
[0].prefv4
.prefixlen
= IPV4_MAX_PREFIXLEN
;
803 srl
->nhlfe
[0].prefv4
.family
= AF_INET
;
804 apply_mask_ipv4(&srl
->nhlfe
[0].prefv4
);
805 IPV4_ADDR_COPY(&srl
->nhlfe
[1].prefv4
.prefix
, &link
->link_data
);
806 srl
->nhlfe
[1].prefv4
.prefixlen
= IPV4_MAX_PREFIXLEN
;
807 srl
->nhlfe
[1].prefv4
.family
= AF_INET
;
808 apply_mask_ipv4(&srl
->nhlfe
[1].prefv4
);
810 if (IS_DEBUG_OSPF_SR
) {
811 zlog_debug(" |- Found primary Adj/Lan Sid %d for %s/%d",
812 srl
->sid
[0], inet_ntoa(srl
->nhlfe
[0].prefv4
.prefix
),
813 srl
->nhlfe
[0].prefv4
.prefixlen
);
814 zlog_debug(" |- Found backup Adj/Lan Sid %d for %s/%d",
815 srl
->sid
[1], inet_ntoa(srl
->nhlfe
[1].prefv4
.prefix
),
816 srl
->nhlfe
[1].prefv4
.prefixlen
);
822 /* Extended Prefix SubTLVs Getter */
823 static struct sr_prefix
*get_ext_prefix_sid(struct tlv_header
*tlvh
)
826 struct sr_prefix
*srp
;
827 struct ext_tlv_prefix
*pref
= (struct ext_tlv_prefix
*)tlvh
;
828 struct ext_subtlv_prefix_sid
*psid
;
830 struct tlv_header
*sub_tlvh
;
831 u_int16_t length
= 0, sum
= 0;
833 srp
= XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_prefix
));
838 /* Initialize TLV browsing */
839 length
= ntohs(tlvh
->length
) - EXT_TLV_PREFIX_SIZE
;
840 sub_tlvh
= (struct tlv_header
*)((char *)(tlvh
) + TLV_HDR_SIZE
841 + EXT_TLV_PREFIX_SIZE
);
842 for (; sum
< length
; sub_tlvh
= TLV_HDR_NEXT(sub_tlvh
)) {
843 switch (ntohs(sub_tlvh
->type
)) {
844 case EXT_SUBTLV_PREFIX_SID
:
845 psid
= (struct ext_subtlv_prefix_sid
*)sub_tlvh
;
846 if (psid
->algorithm
!= SR_ALGORITHM_SPF
) {
848 "SR (get_ext_prefix_sid): "
849 "Unsupported Algorithm");
850 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
853 srp
->type
= PREF_SID
;
854 srp
->flags
= psid
->flags
;
855 if (CHECK_FLAG(psid
->flags
, EXT_SUBTLV_PREFIX_SID_VFLG
))
856 srp
->sid
= GET_LABEL(ntohl(psid
->value
));
858 srp
->sid
= ntohl(psid
->value
);
859 IPV4_ADDR_COPY(&srp
->nhlfe
.prefv4
.prefix
,
861 srp
->nhlfe
.prefv4
.prefixlen
= pref
->pref_length
;
862 srp
->nhlfe
.prefv4
.family
= AF_INET
;
863 apply_mask_ipv4(&srp
->nhlfe
.prefv4
);
868 sum
+= TLV_SIZE(sub_tlvh
);
871 if (IS_DEBUG_OSPF_SR
)
872 zlog_debug(" |- Found SID %d for prefix %s/%d", srp
->sid
,
873 inet_ntoa(srp
->nhlfe
.prefv4
.prefix
),
874 srp
->nhlfe
.prefv4
.prefixlen
);
879 * Functions to manipulate Segment Routing Link & Prefix structures
882 /* Compare two Segment Link: return 0 if equal, 1 otherwise */
883 static inline int sr_link_cmp(struct sr_link
*srl1
, struct sr_link
*srl2
)
885 if ((srl1
->sid
[0] == srl2
->sid
[0]) && (srl1
->sid
[1] == srl2
->sid
[1])
886 && (srl1
->type
== srl2
->type
) && (srl1
->flags
[0] == srl2
->flags
[0])
887 && (srl1
->flags
[1] == srl2
->flags
[1]))
893 /* Compare two Segment Prefix: return 0 if equal, 1 otherwise */
894 static inline int sr_prefix_cmp(struct sr_prefix
*srp1
, struct sr_prefix
*srp2
)
896 if ((srp1
->sid
== srp2
->sid
) && (srp1
->flags
== srp2
->flags
))
902 /* Update Segment Link of given Segment Routing Node */
903 static void update_ext_link_sid(struct sr_node
*srn
, struct sr_link
*srl
,
906 struct listnode
*node
;
911 if ((srn
== NULL
) || (srl
== NULL
))
914 if (IS_DEBUG_OSPF_SR
)
915 zlog_debug(" |- Process Extended Link Adj/Lan-SID");
917 /* Process only Local Adj/Lan_Adj SID coming from LSA SELF */
918 if (!CHECK_FLAG(srl
->flags
[0], EXT_SUBTLV_LINK_ADJ_SID_LFLG
)
919 || !CHECK_FLAG(srl
->flags
[1], EXT_SUBTLV_LINK_ADJ_SID_LFLG
)
920 || !CHECK_FLAG(lsa_flags
, OSPF_LSA_SELF
))
923 /* Search for existing Segment Link */
924 for (ALL_LIST_ELEMENTS_RO(srn
->ext_link
, node
, lk
))
925 if (lk
->instance
== srl
->instance
) {
930 if (IS_DEBUG_OSPF_SR
)
931 zlog_debug(" |- %s SR Link 8.0.0.%d for SR node %s",
932 found
? "Update" : "Add",
933 GET_OPAQUE_ID(srl
->instance
),
934 inet_ntoa(srn
->adv_router
));
936 /* if not found, add new Segment Link and install NHLFE */
938 /* Complete SR-Link and add it to SR-Node list */
940 IPV4_ADDR_COPY(&srl
->adv_router
, &srn
->adv_router
);
941 listnode_add(srn
->ext_link
, srl
);
942 /* Try to set MPLS table */
943 if (compute_link_nhlfe(srl
)) {
944 add_sid_nhlfe(srl
->nhlfe
[0]);
945 add_sid_nhlfe(srl
->nhlfe
[1]);
948 if (sr_link_cmp(lk
, srl
)) {
949 if (compute_link_nhlfe(srl
)) {
950 update_sid_nhlfe(lk
->nhlfe
[0], srl
->nhlfe
[0]);
951 update_sid_nhlfe(lk
->nhlfe
[1], srl
->nhlfe
[1]);
952 /* Replace Segment List */
953 listnode_delete(srn
->ext_link
, lk
);
954 XFREE(MTYPE_OSPF_SR_PARAMS
, lk
);
956 IPV4_ADDR_COPY(&srl
->adv_router
,
958 listnode_add(srn
->ext_link
, srl
);
960 XFREE(MTYPE_OSPF_SR_PARAMS
, srl
);
963 /* This is just an LSA refresh.
964 * Stop processing and free SR Link */
965 XFREE(MTYPE_OSPF_SR_PARAMS
, srl
);
970 /* Update Segment Prefix of given Segment Routing Node */
971 static void update_ext_prefix_sid(struct sr_node
*srn
, struct sr_prefix
*srp
)
974 struct listnode
*node
;
975 struct sr_prefix
*pref
;
979 if (srn
== NULL
|| srp
== NULL
)
982 if (IS_DEBUG_OSPF_SR
)
983 zlog_debug(" |- Process Extended Prefix SID %d", srp
->sid
);
985 /* Process only Global Prefix SID */
986 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_LFLG
))
989 /* Search for existing Segment Prefix */
990 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, pref
))
991 if (pref
->instance
== srp
->instance
) {
996 if (IS_DEBUG_OSPF_SR
)
997 zlog_debug(" |- %s SR LSA ID 7.0.0.%d for SR node %s",
998 found
? "Update" : "Add",
999 GET_OPAQUE_ID(srp
->instance
),
1000 inet_ntoa(srn
->adv_router
));
1002 /* if not found, add new Segment Prefix and install NHLFE */
1004 /* Complete SR-Prefix and add it to SR-Node list */
1006 IPV4_ADDR_COPY(&srp
->adv_router
, &srn
->adv_router
);
1007 listnode_add(srn
->ext_prefix
, srp
);
1008 /* Try to set MPLS table */
1009 if (compute_prefix_nhlfe(srp
) == 1) {
1010 add_sid_nhlfe(srp
->nhlfe
);
1013 if (sr_prefix_cmp(pref
, srp
)) {
1014 if (compute_prefix_nhlfe(srp
) == 1) {
1015 update_sid_nhlfe(pref
->nhlfe
, srp
->nhlfe
);
1016 /* Replace Segment Prefix */
1017 listnode_delete(srn
->ext_prefix
, pref
);
1018 XFREE(MTYPE_OSPF_SR_PARAMS
, pref
);
1020 IPV4_ADDR_COPY(&srp
->adv_router
,
1022 listnode_add(srn
->ext_prefix
, srp
);
1024 /* New NHLFE was not found.
1025 * Just free the SR Prefix */
1026 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
1029 /* This is just an LSA refresh.
1030 * Stop processing and free SR Prefix */
1031 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
1037 * When change the FRR Self SRGB, update the NHLFE Input Label
1038 * for all Extended Prefix with SID index through hash_iterate()
1040 static void update_in_nhlfe(struct hash_backet
*backet
, void *args
)
1042 struct listnode
*node
;
1043 struct sr_node
*srn
= (struct sr_node
*)backet
->data
;
1044 struct sr_prefix
*srp
;
1045 struct sr_nhlfe
new;
1047 /* Skip Self Node */
1048 if (srn
== OspfSR
.self
)
1051 /* Process Every Extended Prefix for this SR-Node */
1052 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
1053 /* Process only SID Index */
1054 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_VFLG
))
1056 /* Compute new NHLFE */
1057 memcpy(&new, &srp
->nhlfe
, sizeof(struct sr_nhlfe
));
1058 new.label_in
= index2label(srp
->sid
, OspfSR
.srgb
);
1059 /* Update MPLS LFIB */
1060 update_sid_nhlfe(srp
->nhlfe
, new);
1061 /* Finally update Input Label */
1062 srp
->nhlfe
.label_in
= new.label_in
;
1067 * When SRGB has changed, update NHLFE Output Label for all Extended Prefix
1068 * with SID index which use the given SR-Node as nexthop though hash_iterate()
1070 static void update_out_nhlfe(struct hash_backet
*backet
, void *args
)
1072 struct listnode
*node
;
1073 struct sr_node
*srn
= (struct sr_node
*)backet
->data
;
1074 struct sr_node
*srnext
= (struct sr_node
*)args
;
1075 struct sr_prefix
*srp
;
1076 struct sr_nhlfe
new;
1078 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
1079 /* Process only SID Index for next hop without PHP */
1080 if ((srp
->nexthop
== NULL
)
1081 && (!CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
)))
1083 memcpy(&new, &srp
->nhlfe
, sizeof(struct sr_nhlfe
));
1084 new.label_out
= index2label(srp
->sid
, srnext
->srgb
);
1085 update_sid_nhlfe(srp
->nhlfe
, new);
1086 srp
->nhlfe
.label_out
= new.label_out
;
1091 * Following functions are call when new Segment Routing LSA are received
1092 * - Router Information: ospf_sr_ri_lsa_update() & ospf_sr_ri_lsa_delete()
1093 * - Extended Link: ospf_sr_ext_link_update() & ospf_sr_ext_link_delete()
1094 * - Extended Prefix: ospf_ext_prefix_update() & ospf_sr_ext_prefix_delete()
1097 /* Update Segment Routing from Router Information LSA */
1098 void ospf_sr_ri_lsa_update(struct ospf_lsa
*lsa
)
1100 struct sr_node
*srn
;
1101 struct tlv_header
*tlvh
;
1102 struct lsa_header
*lsah
= (struct lsa_header
*)lsa
->data
;
1103 struct ri_sr_tlv_sid_label_range
*ri_srgb
;
1104 struct ri_sr_tlv_sr_algorithm
*algo
;
1105 struct sr_srgb srgb
;
1106 u_int16_t length
= 0, sum
= 0;
1108 if (IS_DEBUG_OSPF_SR
)
1110 "SR (ospf_sr_ri_lsa_update): Process Router "
1111 "Information LSA 4.0.0.%d from %s",
1112 GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1113 inet_ntoa(lsah
->adv_router
));
1116 if (IS_LSA_SELF(lsa
))
1119 if (OspfSR
.neighbors
== NULL
) {
1121 "SR (ospf_sr_ri_lsa_update): Abort! no valid "
1126 /* Get SR Node in hash table from Router ID */
1127 srn
= hash_get(OspfSR
.neighbors
, (void *)&(lsah
->adv_router
),
1128 (void *)sr_node_new
);
1133 "SR (ospf_sr_ri_lsa_update): Abort! can't create "
1134 "SR node in hash table");
1138 if ((srn
->instance
!= 0) && (srn
->instance
!= ntohl(lsah
->id
.s_addr
))) {
1140 "SR (ospf_sr_ri_lsa_update): Abort! Wrong "
1141 "LSA ID 4.0.0.%d for SR node %s/%d",
1142 GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1143 inet_ntoa(lsah
->adv_router
), srn
->instance
);
1147 /* Collect Router Information Sub TLVs */
1148 /* Initialize TLV browsing */
1149 length
= ntohs(lsah
->length
) - OSPF_LSA_HEADER_SIZE
;
1150 srgb
.range_size
= 0;
1151 srgb
.lower_bound
= 0;
1153 for (tlvh
= TLV_HDR_TOP(lsah
); sum
< length
;
1154 tlvh
= TLV_HDR_NEXT(tlvh
)) {
1155 switch (ntohs(tlvh
->type
)) {
1156 case RI_SR_TLV_SR_ALGORITHM
:
1157 algo
= (struct ri_sr_tlv_sr_algorithm
*)tlvh
;
1159 for (i
= 0; i
< ntohs(algo
->header
.length
); i
++)
1160 srn
->algo
[i
] = algo
->value
[0];
1161 for (; i
< ALGORITHM_COUNT
; i
++)
1162 srn
->algo
[i
] = SR_ALGORITHM_UNSET
;
1163 sum
+= TLV_SIZE(tlvh
);
1165 case RI_SR_TLV_SID_LABEL_RANGE
:
1166 ri_srgb
= (struct ri_sr_tlv_sid_label_range
*)tlvh
;
1167 srgb
.range_size
= GET_RANGE_SIZE(ntohl(ri_srgb
->size
));
1169 GET_LABEL(ntohl(ri_srgb
->lower
.value
));
1170 sum
+= TLV_SIZE(tlvh
);
1172 case RI_SR_TLV_NODE_MSD
:
1173 srn
->msd
= ((struct ri_sr_tlv_node_msd
*)(tlvh
))->value
;
1174 sum
+= TLV_SIZE(tlvh
);
1177 sum
+= TLV_SIZE(tlvh
);
1182 /* Check that we collect mandatory parameters */
1183 if (srn
->algo
[0] == SR_ALGORITHM_UNSET
|| srgb
.range_size
== 0
1184 || srgb
.lower_bound
== 0) {
1186 "SR (ospf_sr_ri_lsa_update): Missing "
1187 "mandatory parameters. Abort!");
1188 hash_release(OspfSR
.neighbors
, &(srn
->adv_router
));
1189 XFREE(MTYPE_OSPF_SR_PARAMS
, srn
);
1193 /* Check if it is a new SR Node or not */
1194 if (srn
->instance
== 0) {
1196 srn
->instance
= ntohl(lsah
->id
.s_addr
);
1198 srn
->srgb
.range_size
= srgb
.range_size
;
1199 srn
->srgb
.lower_bound
= srgb
.lower_bound
;
1202 /* Check if SRGB has changed */
1203 if ((srn
->srgb
.range_size
!= srgb
.range_size
)
1204 || (srn
->srgb
.lower_bound
!= srgb
.lower_bound
)) {
1205 srn
->srgb
.range_size
= srgb
.range_size
;
1206 srn
->srgb
.lower_bound
= srgb
.lower_bound
;
1207 /* Update NHLFE if it is a neighbor SR node */
1208 if (srn
->neighbor
== OspfSR
.self
)
1209 hash_iterate(OspfSR
.neighbors
,
1210 (void (*)(struct hash_backet
*,
1211 void *))update_out_nhlfe
,
1219 * Delete SR Node entry in hash table information corresponding to an expired
1220 * Router Information LSA
1222 void ospf_sr_ri_lsa_delete(struct ospf_lsa
*lsa
)
1224 struct sr_node
*srn
;
1225 struct lsa_header
*lsah
= (struct lsa_header
*)lsa
->data
;
1227 if (IS_DEBUG_OSPF_SR
)
1229 "SR (ospf_sr_ri_lsa_delete): Remove SR node %s "
1230 "from lsa_id 4.0.0.%d",
1231 inet_ntoa(lsah
->adv_router
),
1232 GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)));
1235 if (OspfSR
.neighbors
== NULL
) {
1237 "SR (ospf_sr_ri_lsa_delete): Abort! no valid "
1242 /* Release Router ID entry in SRDB hash table */
1243 srn
= hash_release(OspfSR
.neighbors
, &(lsah
->adv_router
));
1248 "SR (ospf_sr_ri_lsa_delete): Abort! no entry in SRDB "
1250 inet_ntoa(lsah
->adv_router
));
1254 if ((srn
->instance
!= 0) && (srn
->instance
!= ntohl(lsah
->id
.s_addr
))) {
1256 "SR (ospf_sr_ri_lsa_delete): Abort! Wrong "
1257 "LSA ID 4.0.0.%d for SR node %s",
1258 GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1259 inet_ntoa(lsah
->adv_router
));
1263 /* Remove SR node */
1269 /* Update Segment Routing from Extended Link LSA */
1270 void ospf_sr_ext_link_lsa_update(struct ospf_lsa
*lsa
)
1272 struct sr_node
*srn
;
1273 struct tlv_header
*tlvh
;
1274 struct lsa_header
*lsah
= (struct lsa_header
*)lsa
->data
;
1275 struct sr_link
*srl
;
1277 u_int16_t length
, sum
;
1279 if (IS_DEBUG_OSPF_SR
)
1281 "SR (ospf_sr_ext_link_lsa_update): Process "
1282 "Extended Link LSA 8.0.0.%d from %s",
1283 GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1284 inet_ntoa(lsah
->adv_router
));
1287 if (OspfSR
.neighbors
== NULL
) {
1289 "SR (ospf_sr_ext_link_lsa_update): Abort! no "
1290 "valid SR DataBase");
1294 /* Get SR Node in hash table from Router ID */
1295 srn
= (struct sr_node
*)hash_get(OspfSR
.neighbors
,
1296 (void *)&(lsah
->adv_router
),
1297 (void *)sr_node_new
);
1302 "SR (ospf_sr_ext_link_lsa_update): Abort! can't "
1303 "create SR node in hash table");
1307 /* Initialize TLV browsing */
1308 length
= ntohs(lsah
->length
) - OSPF_LSA_HEADER_SIZE
;
1310 for (tlvh
= TLV_HDR_TOP(lsah
); sum
< length
;
1311 tlvh
= TLV_HDR_NEXT(tlvh
)) {
1312 if (ntohs(tlvh
->type
) == EXT_TLV_LINK
) {
1313 /* Got Extended Link information */
1314 srl
= get_ext_link_sid(tlvh
);
1315 /* Update SID if not null */
1317 srl
->instance
= ntohl(lsah
->id
.s_addr
);
1318 update_ext_link_sid(srn
, srl
, lsa
->flags
);
1321 sum
+= TLV_SIZE(tlvh
);
1325 /* Delete Segment Routing from Extended Link LSA */
1326 void ospf_sr_ext_link_lsa_delete(struct ospf_lsa
*lsa
)
1328 struct listnode
*node
;
1329 struct sr_link
*srl
;
1330 struct sr_node
*srn
;
1331 struct lsa_header
*lsah
= (struct lsa_header
*)lsa
->data
;
1332 u_int32_t instance
= ntohl(lsah
->id
.s_addr
);
1334 if (IS_DEBUG_OSPF_SR
)
1336 "SR (ospf_sr_ext_link_lsa_delete): Remove "
1337 "Extended Link LSA 8.0.0.%d from %s",
1338 GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1339 inet_ntoa(lsah
->adv_router
));
1342 if (OspfSR
.neighbors
== NULL
) {
1344 "SR (ospf_sr_ext_link_lsa_delete): Abort! no "
1345 "valid SR DataBase");
1349 /* Search SR Node in hash table from Router ID */
1350 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
,
1351 (void *)&(lsah
->adv_router
));
1353 /* SR-Node may be NULL if it has been remove previously when
1354 * processing Router Information LSA deletion */
1357 "SR (ospf_sr_ext_link_lsa_delete): Stop! "
1358 "no entry in SRDB for SR Node %s",
1359 inet_ntoa(lsah
->adv_router
));
1363 /* Search for corresponding Segment Link */
1364 for (ALL_LIST_ELEMENTS_RO(srn
->ext_link
, node
, srl
))
1365 if (srl
->instance
== instance
)
1368 /* Remove Segment Link if found */
1369 if ((srl
!= NULL
) && (srl
->instance
== instance
)) {
1370 del_sid_nhlfe(srl
->nhlfe
[0]);
1371 del_sid_nhlfe(srl
->nhlfe
[1]);
1372 listnode_delete(srn
->ext_link
, srl
);
1373 XFREE(MTYPE_OSPF_SR_PARAMS
, srl
);
1376 "SR (ospf_sr_ext_link_lsa_delete): Didn't "
1377 "found corresponding SR Link 8.0.0.%d for SR Node %s",
1378 GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1379 inet_ntoa(lsah
->adv_router
));
1385 /* Update Segment Routing from Extended Prefix LSA */
1386 void ospf_sr_ext_prefix_lsa_update(struct ospf_lsa
*lsa
)
1388 struct sr_node
*srn
;
1389 struct tlv_header
*tlvh
;
1390 struct lsa_header
*lsah
= (struct lsa_header
*)lsa
->data
;
1391 struct sr_prefix
*srp
;
1393 u_int16_t length
, sum
;
1395 if (IS_DEBUG_OSPF_SR
)
1397 "SR (ospf_sr_ext_prefix_lsa_update): Process "
1398 "Extended Prefix LSA 7.0.0.%d from %s",
1399 GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1400 inet_ntoa(lsah
->adv_router
));
1403 if (OspfSR
.neighbors
== NULL
) {
1405 "SR (ospf_sr_ext_prefix_lsa_update): Abort! no "
1406 "valid SR DataBase");
1410 /* Get SR Node in hash table from Router ID */
1411 srn
= (struct sr_node
*)hash_get(OspfSR
.neighbors
,
1412 (void *)&(lsah
->adv_router
),
1413 (void *)sr_node_new
);
1418 "SR (ospf_sr_ext_prefix_lsa_update): Abort! can't "
1419 "create SR node in hash table");
1423 /* Initialize TLV browsing */
1424 length
= ntohs(lsah
->length
) - OSPF_LSA_HEADER_SIZE
;
1426 for (tlvh
= TLV_HDR_TOP(lsah
); sum
< length
;
1427 tlvh
= TLV_HDR_NEXT(tlvh
)) {
1428 if (ntohs(tlvh
->type
) == EXT_TLV_LINK
) {
1429 /* Got Extended Link information */
1430 srp
= get_ext_prefix_sid(tlvh
);
1431 /* Update SID if not null */
1433 srp
->instance
= ntohl(lsah
->id
.s_addr
);
1434 update_ext_prefix_sid(srn
, srp
);
1437 sum
+= TLV_SIZE(tlvh
);
1441 /* Delete Segment Routing from Extended Prefix LSA */
1442 void ospf_sr_ext_prefix_lsa_delete(struct ospf_lsa
*lsa
)
1444 struct listnode
*node
;
1445 struct sr_prefix
*srp
;
1446 struct sr_node
*srn
;
1447 struct lsa_header
*lsah
= (struct lsa_header
*)lsa
->data
;
1448 u_int32_t instance
= ntohl(lsah
->id
.s_addr
);
1450 if (IS_DEBUG_OSPF_SR
)
1452 "SR (ospf_sr_ext_prefix_lsa_delete): Remove "
1453 "Extended Prefix LSA 7.0.0.%d from %s",
1454 GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1455 inet_ntoa(lsah
->adv_router
));
1458 if (OspfSR
.neighbors
== NULL
) {
1460 "SR (ospf_sr_ext_prefix_lsa_delete): Abort! no "
1461 "valid SR DataBase");
1465 /* Search SR Node in hash table from Router ID */
1466 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
,
1467 (void *)&(lsah
->adv_router
));
1469 /* SR-Node may be NULL if it has been remove previously when
1470 * processing Router Information LSA deletion */
1473 "SR (ospf_sr_ext_prefix_lsa_delete): Stop! "
1474 "no entry in SRDB for SR Node %s",
1475 inet_ntoa(lsah
->adv_router
));
1479 /* Search for corresponding Segment Link */
1480 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
))
1481 if (srp
->instance
== instance
)
1484 /* Remove Segment Link if found */
1485 if ((srp
!= NULL
) && (srp
->instance
== instance
)) {
1486 del_sid_nhlfe(srp
->nhlfe
);
1487 listnode_delete(srn
->ext_link
, srp
);
1488 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
1491 "SR (ospf_sr_ext_prefix_lsa_delete): Didn't found"
1492 "corresponding SR Prefix 7.0.0.%d for SR Node %s",
1493 GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1494 inet_ntoa(lsah
->adv_router
));
1500 /* Get Label for Extended Link SID */
1501 /* TODO: To be replace by Zebra Label Manager */
1502 u_int32_t
get_ext_link_label_value(void)
1504 static u_int32_t label
= ADJ_SID_MIN
- 1;
1506 if (label
< ADJ_SID_MAX
)
1513 * Following functions are used to update MPLS LFIB after a SPF run
1516 static void ospf_sr_nhlfe_update(struct hash_backet
*backet
, void *args
)
1519 struct sr_node
*srn
= (struct sr_node
*)backet
->data
;
1520 struct listnode
*node
;
1521 struct sr_prefix
*srp
;
1522 struct sr_nhlfe old
;
1523 struct interface
*ifp
;
1531 if (IS_DEBUG_OSPF_SR
)
1532 zlog_debug(" |- Update Prefix for SR Node %s",
1533 inet_ntoa(srn
->adv_router
));
1535 /* For FRR router check if there is no SR Prefix
1536 * waiting to be communicated to Extended Prefix */
1537 if (srn
== OspfSR
.self
) {
1538 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
1540 /* Skip Prefix already engaged */
1541 if (srp
->instance
!= 0)
1543 /* Get Interface and check if it is a Loopback */
1545 p
.prefixlen
= srp
->nhlfe
.prefv4
.prefixlen
;
1546 IPV4_ADDR_COPY(&p
.u
.prefix4
, &srp
->nhlfe
.prefv4
.prefix
);
1547 ifp
= if_lookup_prefix(&p
, VRF_DEFAULT
);
1550 /* If interface is not a loopback, remove SR prefix */
1551 if (!if_is_loopback(ifp
)) {
1553 " |- Interface %s is not a "
1554 "Loopback. Remove prefix",
1556 listnode_delete(srn
->ext_prefix
, srp
);
1557 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
1560 /* OK. Let's update Extended Prefix LSA */
1561 rc
= ospf_ext_schedule_prefix_index(ifp
, srp
->sid
,
1562 &srp
->nhlfe
.prefv4
);
1563 srp
->instance
= SET_OPAQUE_LSID(
1564 OPAQUE_TYPE_EXTENDED_PREFIX_LSA
, rc
);
1565 srp
->nhlfe
.ifindex
= ifp
->ifindex
;
1570 /* Update Extended Prefix */
1571 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
1573 /* Backup current NHLFE */
1574 memcpy(&old
, &srp
->nhlfe
, sizeof(struct sr_nhlfe
));
1576 /* Compute the new NHLFE */
1577 rc
= compute_prefix_nhlfe(srp
);
1579 /* Check computation result */
1581 /* next hop is not know, remove old NHLFE to avoid loop */
1583 del_sid_nhlfe(srp
->nhlfe
);
1585 /* next hop has not changed, skip it */
1588 /* there is a new next hop, update NHLFE */
1590 update_sid_nhlfe(old
, srp
->nhlfe
);
1598 static int ospf_sr_update_schedule(struct thread
*t
)
1602 struct timeval start_time
, stop_time
;
1604 ospf
= THREAD_ARG(t
);
1605 ospf
->t_sr_update
= NULL
;
1610 monotime(&start_time
);
1612 if (IS_DEBUG_OSPF_SR
)
1613 zlog_debug("SR (ospf_sr_update_schedule): Start SPF update");
1615 hash_iterate(OspfSR
.neighbors
, (void (*)(struct hash_backet
*,
1616 void *))ospf_sr_nhlfe_update
,
1619 monotime(&stop_time
);
1622 "SR (ospf_sr_update_schedule): SPF Processing Time(usecs): "
1624 (stop_time
.tv_sec
- start_time
.tv_sec
) * 1000000LL
1625 + (stop_time
.tv_usec
- start_time
.tv_usec
));
1627 OspfSR
.update
= false;
1631 #define OSPF_SR_UPDATE_INTERVAL 1
1633 void ospf_sr_update_timer_add(struct ospf
*ospf
)
1639 /* Check if an update is not alreday engage */
1643 OspfSR
.update
= true;
1645 thread_add_timer(master
, ospf_sr_update_schedule
, ospf
,
1646 OSPF_SR_UPDATE_INTERVAL
, &ospf
->t_sr_update
);
1649 /*------------------------------------------------------------------------*
1650 * Followings are vty command functions.
1651 *------------------------------------------------------------------------*/
1654 * Segment Routing Router configuration
1656 * Must be centralize as it concerns both Extended Link/Prefix LSA
1657 * and Router Information LSA. Choose to call it from Extended Prefix
1658 * write_config() call back.
1660 * @param vty VTY output
1664 void ospf_sr_config_write_router(struct vty
*vty
)
1666 struct listnode
*node
;
1667 struct sr_prefix
*srp
;
1669 if (OspfSR
.enabled
) {
1670 vty_out(vty
, " segment-routing on\n");
1672 vty_out(vty
, " segment-routing global-block %d %d\n",
1673 OspfSR
.srgb
.lower_bound
,
1674 OspfSR
.srgb
.lower_bound
+ OspfSR
.srgb
.range_size
- 1);
1676 if (OspfSR
.msd
!= 0)
1677 vty_out(vty
, " segment-routing node-msd %d\n",
1680 if (OspfSR
.self
!= NULL
) {
1681 for (ALL_LIST_ELEMENTS_RO(OspfSR
.self
->ext_prefix
, node
,
1684 " segment-routing prefix %s/%d "
1686 inet_ntoa(srp
->nhlfe
.prefv4
.prefix
),
1687 srp
->nhlfe
.prefv4
.prefixlen
, srp
->sid
);
1693 DEFUN(ospf_sr_enable
,
1695 "segment-routing on",
1697 "Enable Segment Routing\n")
1700 VTY_DECLVAR_INSTANCE_CONTEXT(ospf
, ospf
);
1705 if (IS_DEBUG_OSPF_EVENT
)
1706 zlog_debug("SR: Segment Routing: OFF -> ON");
1708 /* Start Segment Routing */
1709 OspfSR
.enabled
= true;
1710 if (!ospf_sr_start(ospf
)) {
1711 zlog_warn("SR: Unable to start Segment Routing. Abort!");
1715 /* Set Router Information SR parameters */
1716 if (IS_DEBUG_OSPF_EVENT
)
1717 zlog_debug("SR: Activate SR for Router Information LSA");
1719 ospf_router_info_update_sr(true, OspfSR
.srgb
, OspfSR
.msd
);
1721 /* Update Ext LSA */
1722 if (IS_DEBUG_OSPF_EVENT
)
1723 zlog_debug("SR: Activate SR for Extended Link/Prefix LSA");
1725 ospf_ext_update_sr(true);
1730 DEFUN (no_ospf_sr_enable
,
1731 no_ospf_sr_enable_cmd
,
1732 "no segment-routing [on]",
1735 "Disable Segment Routing\n")
1738 if (!OspfSR
.enabled
)
1741 if (IS_DEBUG_OSPF_EVENT
)
1742 zlog_debug("SR: Segment Routing: ON -> OFF");
1744 /* Start by Disabling Extended Link & Prefix LSA */
1745 ospf_ext_update_sr(false);
1747 /* then, disable Router Information SR parameters */
1748 ospf_router_info_update_sr(false, OspfSR
.srgb
, OspfSR
.msd
);
1750 /* Finally, stop Segment Routing */
1752 OspfSR
.enabled
= false;
1757 static int ospf_sr_enabled(struct vty
*vty
)
1763 vty_out(vty
, "%% OSPF SR is not turned on\n");
1768 DEFUN (sr_sid_label_range
,
1769 sr_sid_label_range_cmd
,
1770 "segment-routing global-block (0-1048575) (0-1048575)",
1772 "Segment Routing Global Block label range\n"
1773 "Lower-bound range in decimal (0-1048575)\n"
1774 "Upper-bound range in decimal (0-1048575)\n")
1782 if (!ospf_sr_enabled(vty
))
1783 return CMD_WARNING_CONFIG_FAILED
;
1785 if (sscanf(argv
[idx_low
]->arg
, "%d", &lower
) != 1) {
1786 vty_out(vty
, "segment-routing: fscanf: %s\n",
1787 safe_strerror(errno
));
1788 return CMD_WARNING_CONFIG_FAILED
;
1791 if (sscanf(argv
[idx_up
]->arg
, "%d", &upper
) != 1) {
1792 vty_out(vty
, "segment-routing: fscanf: %s\n",
1793 safe_strerror(errno
));
1794 return CMD_WARNING_CONFIG_FAILED
;
1797 size
= upper
- lower
+ 1;
1799 if (size
> MPLS_DEFAULT_MAX_SRGB_SIZE
|| size
<= 0) {
1801 "Range size cannot be less than 0 or more than %d\n",
1802 MPLS_DEFAULT_MAX_SRGB_SIZE
);
1803 return CMD_WARNING_CONFIG_FAILED
;
1806 if (upper
> MPLS_DEFAULT_MAX_SRGB_LABEL
) {
1807 vty_out(vty
, "Upper-bound cannot exceed %d\n",
1808 MPLS_DEFAULT_MAX_SRGB_LABEL
);
1809 return CMD_WARNING_CONFIG_FAILED
;
1812 if (upper
< MPLS_DEFAULT_MIN_SRGB_LABEL
) {
1813 vty_out(vty
, "Upper-bound cannot be lower than %d\n",
1814 MPLS_DEFAULT_MIN_SRGB_LABEL
);
1815 return CMD_WARNING_CONFIG_FAILED
;
1818 /* Set SID/Label range SRGB */
1819 OspfSR
.srgb
.range_size
= size
;
1820 OspfSR
.srgb
.lower_bound
= lower
;
1822 /* Set Router Information SR parameters */
1823 ospf_router_info_update_sr(true, OspfSR
.srgb
, OspfSR
.msd
);
1825 /* Update NHLFE entries */
1826 hash_iterate(OspfSR
.neighbors
,
1827 (void (*)(struct hash_backet
*, void *))update_in_nhlfe
,
1833 DEFUN (no_sr_sid_label_range
,
1834 no_sr_sid_label_range_cmd
,
1835 "no segment-routing global-block",
1838 "Delete Segment Routing Global Block label range\n")
1841 if (!ospf_sr_enabled(vty
))
1842 return CMD_WARNING_CONFIG_FAILED
;
1844 /* Revert to default SRGB value */
1845 OspfSR
.srgb
.range_size
= MPLS_DEFAULT_MIN_SRGB_SIZE
;
1846 OspfSR
.srgb
.lower_bound
= MPLS_DEFAULT_MIN_SRGB_LABEL
;
1848 /* Set Router Information SR parameters */
1849 ospf_router_info_update_sr(true, OspfSR
.srgb
, OspfSR
.msd
);
1851 /* Update NHLFE entries */
1852 hash_iterate(OspfSR
.neighbors
,
1853 (void (*)(struct hash_backet
*, void *))update_in_nhlfe
,
1861 "segment-routing node-msd (1-16)",
1863 "Maximum Stack Depth for this router\n"
1864 "Maximum number of label that could be stack (1-16)\n")
1869 if (!ospf_sr_enabled(vty
))
1870 return CMD_WARNING_CONFIG_FAILED
;
1872 if (sscanf(argv
[idx_number
]->arg
, "%d", &msd
) != 1) {
1873 vty_out(vty
, "segment-routing: fscanf: %s\n",
1874 safe_strerror(errno
));
1875 return CMD_WARNING_CONFIG_FAILED
;
1878 if (msd
< 1 || msd
> MPLS_MAX_LABELS
) {
1879 vty_out(vty
, "MSD must be comprise between 1 and %d\n",
1881 return CMD_WARNING_CONFIG_FAILED
;
1884 /* Set this router MSD */
1887 /* Set Router Information SR parameters */
1888 ospf_router_info_update_sr(true, OspfSR
.srgb
, OspfSR
.msd
);
1893 DEFUN (no_sr_node_msd
,
1895 "no segment-routing node-msd",
1898 "Disable Maximum Stack Depth for this router\n")
1901 if (!ospf_sr_enabled(vty
))
1902 return CMD_WARNING_CONFIG_FAILED
;
1904 /* unset this router MSD */
1907 /* Set Router Information SR parameters */
1908 ospf_router_info_update_sr(true, OspfSR
.srgb
, 0);
1913 DEFUN (sr_prefix_sid
,
1915 "segment-routing prefix A.B.C.D/M index (0-65535)",
1918 "IPv4 Prefix as A.B.C.D/M\n"
1919 "SID index for this prefix in decimal (0-65535)\n"
1920 "Index value inside SRGB (lower_bound < index < upper_bound)\n")
1926 struct listnode
*node
;
1927 struct sr_prefix
*srp
;
1928 struct interface
*ifp
;
1930 if (!ospf_sr_enabled(vty
))
1931 return CMD_WARNING_CONFIG_FAILED
;
1933 /* Get network prefix */
1934 str2prefix(argv
[idx_prefix
]->arg
, &p
);
1936 /* Get & verify index value */
1937 index
= strtoul(argv
[idx_index
]->arg
, NULL
, 10);
1938 if (index
> OspfSR
.srgb
.range_size
- 1) {
1939 vty_out(vty
, "Index %d must be lower than range size %d\n",
1940 index
, OspfSR
.srgb
.range_size
);
1941 return CMD_WARNING_CONFIG_FAILED
;
1944 /* check that the index is not already used */
1945 for (ALL_LIST_ELEMENTS_RO(OspfSR
.self
->ext_prefix
, node
, srp
)) {
1946 if (srp
->sid
== index
) {
1947 vty_out(vty
, "Index %d is already used\n", index
);
1948 return CMD_WARNING_CONFIG_FAILED
;
1952 /* Get Interface and check if it is a Loopback */
1953 ifp
= if_lookup_prefix(&p
, VRF_DEFAULT
);
1955 /* Interface could be not yet available i.e. when this
1956 * command is in the configuration file, OSPF is not yet
1957 * ready. In this case, store the prefix SID for latter
1958 * (i.e. when SPF run) communication to Extended Prefix */
1959 srp
= XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_prefix
));
1961 IPV4_ADDR_COPY(&srp
->nhlfe
.prefv4
.prefix
, &p
.u
.prefix4
);
1962 srp
->nhlfe
.prefv4
.prefixlen
= p
.prefixlen
;
1963 srp
->nhlfe
.prefv4
.family
= p
.family
;
1965 listnode_add(OspfSR
.self
->ext_prefix
, srp
);
1967 "Interface for prefix %s not found. Deferred LSA "
1969 argv
[idx_prefix
]->arg
);
1972 if (!if_is_loopback(ifp
)) {
1973 vty_out(vty
, "interface %s is not a Loopback\n", ifp
->name
);
1974 return CMD_WARNING_CONFIG_FAILED
;
1977 /* Update Extended Prefix LSA */
1978 if (!ospf_ext_schedule_prefix_index(ifp
, index
,
1979 (struct prefix_ipv4
*)&p
)) {
1980 vty_out(vty
, "Unable to set index %d for prefix %s\n", index
,
1981 argv
[idx_prefix
]->arg
);
1988 DEFUN (no_sr_prefix_sid
,
1989 no_sr_prefix_sid_cmd
,
1990 "no segment-routing prefix A.B.C.D/M",
1994 "IPv4 Prefix as A.B.C.D/M\n")
1998 struct listnode
*node
;
1999 struct sr_prefix
*srp
;
2000 struct interface
*ifp
;
2003 /* Get network prefix */
2004 str2prefix(argv
[idx_prefix
]->arg
, &p
);
2006 /* check that the prefix is already set */
2007 for (ALL_LIST_ELEMENTS_RO(OspfSR
.self
->ext_prefix
, node
, srp
))
2008 if (IPV4_ADDR_SAME(&srp
->nhlfe
.prefv4
.prefix
, &p
.u
.prefix4
)
2009 && (srp
->nhlfe
.prefv4
.prefixlen
== p
.prefixlen
))
2013 vty_out(vty
, "Prefix %s is not found. Abort!\n",
2014 argv
[idx_prefix
]->arg
);
2015 return CMD_WARNING_CONFIG_FAILED
;
2018 /* Get Interface and check if it is a Loopback */
2019 ifp
= if_lookup_prefix(&p
, VRF_DEFAULT
);
2021 vty_out(vty
, "interface for prefix %s not found.\n",
2022 argv
[idx_prefix
]->arg
);
2023 return CMD_WARNING_CONFIG_FAILED
;
2025 if (!if_is_loopback(ifp
)) {
2026 vty_out(vty
, "interface %s is not a Loopback\n", ifp
->name
);
2027 return CMD_WARNING_CONFIG_FAILED
;
2029 /* Update Extended Prefix LSA */
2030 if (!ospf_ext_schedule_prefix_index(ifp
, 0, NULL
)) {
2031 vty_out(vty
, "No corresponding loopback interface. Abort!\n");
2038 static void show_vty_sr_node(struct vty
*vty
, struct sr_node
*srn
)
2041 struct listnode
*node
;
2042 struct sr_link
*srl
;
2043 struct sr_prefix
*srp
;
2044 struct interface
*itf
;
2053 vty_out(vty
, "SR-Node: %s", inet_ntoa(srn
->adv_router
));
2054 vty_out(vty
, "\tSRGB (Size/Label): %d/%d", srn
->srgb
.range_size
,
2055 srn
->srgb
.lower_bound
);
2056 vty_out(vty
, "\tAlgorithm(s): %s",
2057 srn
->algo
[0] == SR_ALGORITHM_SPF
? "SPF" : "S-SPF");
2058 for (int i
= 1; i
< ALGORITHM_COUNT
; i
++) {
2059 if (srn
->algo
[i
] == SR_ALGORITHM_UNSET
)
2062 srn
->algo
[i
] == SR_ALGORITHM_SPF
? "SPF" : "S-SPF");
2065 vty_out(vty
, "\tMSD: %d", srn
->msd
);
2068 "\n\n Prefix or Link Label In Label Out "
2069 "Node or Adj. SID Interface Nexthop\n");
2071 "------------------ -------- --------- "
2072 "-------------------- --------- ---------------\n");
2073 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
2074 strncpy(pref
, inet_ntoa(srp
->nhlfe
.prefv4
.prefix
), 16);
2075 snprintf(sid
, 20, "SR Pfx (idx %d)", srp
->sid
);
2076 if (srp
->nhlfe
.label_out
== MPLS_IMP_NULL_LABEL
)
2077 sprintf(label
, "pop");
2079 sprintf(label
, "%d", srp
->nhlfe
.label_out
);
2080 itf
= if_lookup_by_index(srp
->nhlfe
.ifindex
, VRF_DEFAULT
);
2081 vty_out(vty
, "%15s/%d %8d %9s %20s %9s %15s\n", pref
,
2082 srp
->nhlfe
.prefv4
.prefixlen
, srp
->nhlfe
.label_in
, label
,
2083 sid
, itf
? itf
->name
: "-",
2084 inet_ntoa(srp
->nhlfe
.nexthop
));
2087 for (ALL_LIST_ELEMENTS_RO(srn
->ext_link
, node
, srl
)) {
2088 strncpy(pref
, inet_ntoa(srl
->nhlfe
[0].prefv4
.prefix
), 16);
2089 snprintf(sid
, 20, "SR Adj. (lbl %d)", srl
->sid
[0]);
2090 if (srl
->nhlfe
[0].label_out
== MPLS_IMP_NULL_LABEL
)
2091 sprintf(label
, "pop");
2093 sprintf(label
, "%d", srl
->nhlfe
[0].label_out
);
2094 itf
= if_lookup_by_index(srl
->nhlfe
[0].ifindex
, VRF_DEFAULT
);
2095 vty_out(vty
, "%15s/%d %8d %9s %20s %9s %15s\n", pref
,
2096 srl
->nhlfe
[0].prefv4
.prefixlen
, srl
->nhlfe
[0].label_in
,
2097 label
, sid
, itf
? itf
->name
: "-",
2098 inet_ntoa(srl
->nhlfe
[0].nexthop
));
2099 snprintf(sid
, 20, "SR Adj. (lbl %d)", srl
->sid
[1]);
2100 if (srl
->nhlfe
[1].label_out
== MPLS_IMP_NULL_LABEL
)
2101 sprintf(label
, "pop");
2103 sprintf(label
, "%d", srl
->nhlfe
[0].label_out
);
2104 vty_out(vty
, "%15s/%d %8d %9s %20s %9s %15s\n", pref
,
2105 srl
->nhlfe
[1].prefv4
.prefixlen
, srl
->nhlfe
[1].label_in
,
2106 label
, sid
, itf
? itf
->name
: "-",
2107 inet_ntoa(srl
->nhlfe
[1].nexthop
));
2112 static void show_srdb_entry(struct hash_backet
*backet
, void *args
)
2114 struct vty
*vty
= (struct vty
*)args
;
2115 struct sr_node
*srn
= (struct sr_node
*)backet
->data
;
2117 show_vty_sr_node(vty
, srn
);
2120 DEFUN (show_ip_opsf_srdb
,
2121 show_ip_ospf_srdb_cmd
,
2122 "show ip ospf database segment-routing [adv-router A.B.C.D|self-originate]",
2126 "Database summary\n"
2127 "Show Segment Routing Data Base\n"
2128 "Advertising SR node\n"
2129 "Advertising SR node ID (as an IP address)\n"
2130 "Self-originated SR node\n")
2134 struct sr_node
*srn
;
2136 if (!OspfSR
.enabled
) {
2137 vty_out(vty
, "Segment Routing is disabled on this router\n");
2138 return CMD_WARNING_CONFIG_FAILED
;
2141 vty_out(vty
, "\n OSPF Segment Routing database for ID %s\n\n",
2142 inet_ntoa(OspfSR
.self
->adv_router
));
2144 if (argc
< idx_ip
) {
2145 /* Iterate through all the SRDB */
2148 (void (*)(struct hash_backet
*, void *))show_srdb_entry
,
2151 /* or show only specified SR Node */
2152 if (argc
== idx_ip
) {
2155 if (!inet_aton(argv
[idx_ip
]->arg
, &rid
)) {
2157 "Specified Router ID %s is "
2160 return CMD_WARNING_CONFIG_FAILED
;
2162 /* Get the SR Node from the SRDB */
2163 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
,
2166 show_vty_sr_node(vty
, srn
);
2171 /* Install new CLI commands */
2172 void ospf_sr_register_vty(void)
2174 install_element(VIEW_NODE
, &show_ip_ospf_srdb_cmd
);
2176 install_element(OSPF_NODE
, &ospf_sr_enable_cmd
);
2177 install_element(OSPF_NODE
, &no_ospf_sr_enable_cmd
);
2178 install_element(OSPF_NODE
, &sr_sid_label_range_cmd
);
2179 install_element(OSPF_NODE
, &no_sr_sid_label_range_cmd
);
2180 install_element(OSPF_NODE
, &sr_node_msd_cmd
);
2181 install_element(OSPF_NODE
, &no_sr_node_msd_cmd
);
2182 install_element(OSPF_NODE
, &sr_prefix_sid_cmd
);
2183 install_element(OSPF_NODE
, &no_sr_prefix_sid_cmd
);