2 * This is an implementation of Segment Routing
3 * as per RFC 8665 - OSPF Extensions for Segment Routing
4 * and RFC 8476 - Signaling Maximum SID Depth (MSD) Using OSPF
6 * Module name: Segment Routing
8 * Author: Olivier Dugeon <olivier.dugeon@orange.com>
9 * Author: Anselme Sawadogo <anselmesawadogo@gmail.com>
11 * Copyright (C) 2016 - 2020 Orange Labs http://www.orange.com
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the Free
15 * Software Foundation; either version 2 of the License, or (at your option)
18 * This program is distributed in the hope that it will be useful, but WITHOUT
19 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
20 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
23 * You should have received a copy of the GNU General Public License along
24 * with this program; see the file COPYING; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
43 #include "libospf.h" /* for ospf interface types */
50 #include "sockunion.h" /* for inet_aton() */
58 #include "ospf_errors.h"
60 #include "ospfd/ospfd.h"
61 #include "ospfd/ospf_interface.h"
62 #include "ospfd/ospf_ism.h"
63 #include "ospfd/ospf_asbr.h"
64 #include "ospfd/ospf_lsa.h"
65 #include "ospfd/ospf_lsdb.h"
66 #include "ospfd/ospf_neighbor.h"
67 #include "ospfd/ospf_nsm.h"
68 #include "ospfd/ospf_flood.h"
69 #include "ospfd/ospf_packet.h"
70 #include "ospfd/ospf_spf.h"
71 #include "ospfd/ospf_dump.h"
72 #include "ospfd/ospf_route.h"
73 #include "ospfd/ospf_ase.h"
74 #include "ospfd/ospf_sr.h"
75 #include "ospfd/ospf_ri.h"
76 #include "ospfd/ospf_ext.h"
77 #include "ospfd/ospf_zebra.h"
80 * Global variable to manage Segment Routing on this node.
81 * Note that all parameter values are stored in network byte order.
83 static struct ospf_sr_db OspfSR
;
84 static void ospf_sr_register_vty(void);
85 static inline void del_adj_sid(struct sr_nhlfe nhlfe
);
86 static int ospf_sr_start(struct ospf
*ospf
);
89 * Segment Routing Data Base functions
92 /* Hash function for Segment Routing entry */
93 static unsigned int sr_hash(const void *p
)
95 const struct in_addr
*rid
= p
;
97 return jhash_1word(rid
->s_addr
, 0);
100 /* Compare 2 Router ID hash entries based on SR Node */
101 static bool sr_cmp(const void *p1
, const void *p2
)
103 const struct sr_node
*srn
= p1
;
104 const struct in_addr
*rid
= p2
;
106 return IPV4_ADDR_SAME(&srn
->adv_router
, rid
);
109 /* Functions to remove an SR Link */
110 static void del_sr_link(void *val
)
112 struct sr_link
*srl
= (struct sr_link
*)val
;
114 del_adj_sid(srl
->nhlfe
[0]);
115 del_adj_sid(srl
->nhlfe
[1]);
116 XFREE(MTYPE_OSPF_SR_PARAMS
, val
);
119 /* Functions to remove an SR Prefix */
120 static void del_sr_pref(void *val
)
122 struct sr_prefix
*srp
= (struct sr_prefix
*)val
;
124 ospf_zebra_delete_prefix_sid(srp
);
125 XFREE(MTYPE_OSPF_SR_PARAMS
, val
);
128 /* Allocate new Segment Routine node */
129 static struct sr_node
*sr_node_new(struct in_addr
*rid
)
137 /* Allocate Segment Routing node memory */
138 new = XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_node
));
140 /* Default Algorithm, SRGB and MSD */
141 for (int i
= 0; i
< ALGORITHM_COUNT
; i
++)
142 new->algo
[i
] = SR_ALGORITHM_UNSET
;
144 new->srgb
.range_size
= 0;
145 new->srgb
.lower_bound
= 0;
148 /* Create Link, Prefix and Range TLVs list */
149 new->ext_link
= list_new();
150 new->ext_prefix
= list_new();
151 new->ext_link
->del
= del_sr_link
;
152 new->ext_prefix
->del
= del_sr_pref
;
154 IPV4_ADDR_COPY(&new->adv_router
, rid
);
155 new->neighbor
= NULL
;
158 osr_debug(" |- Created new SR node for %pI4", &new->adv_router
);
162 /* Supposed to be used for testing */
163 struct sr_node
*ospf_sr_node_create(struct in_addr
*rid
)
167 srn
= hash_get(OspfSR
.neighbors
, (void *)rid
, (void *)sr_node_new
);
172 /* Delete Segment Routing node */
173 static void sr_node_del(struct sr_node
*srn
)
179 osr_debug(" |- Delete SR node for %pI4", &srn
->adv_router
);
181 /* Clean Extended Link */
182 list_delete(&srn
->ext_link
);
184 /* Clean Prefix List */
185 list_delete(&srn
->ext_prefix
);
187 XFREE(MTYPE_OSPF_SR_PARAMS
, srn
);
190 /* Get SR Node for a given nexthop */
191 static struct sr_node
*get_sr_node_by_nexthop(struct ospf
*ospf
,
192 struct in_addr nexthop
)
194 struct ospf_interface
*oi
= NULL
;
195 struct ospf_neighbor
*nbr
= NULL
;
196 struct listnode
*node
;
197 struct route_node
*rn
;
202 if (OspfSR
.neighbors
== NULL
)
205 osr_debug(" |- Search SR-Node for nexthop %pI4", &nexthop
);
207 /* First, search neighbor Router ID for this nexthop */
209 for (ALL_LIST_ELEMENTS_RO(ospf
->oiflist
, node
, oi
)) {
210 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
)) {
212 if ((nbr
) && (IPV4_ADDR_SAME(&nexthop
, &nbr
->src
))) {
224 osr_debug(" |- Found nexthop Router ID %pI4", &nbr
->router_id
);
226 /* Then, search SR Node */
227 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
, &nbr
->router_id
);
233 * Segment Routing Local Block management functions
237 * It is necessary to known which label is already allocated to manage the range
238 * of SRLB. This is particular useful when an interface flap (goes up / down
239 * frequently). Here, SR will release and then allocate label for the Adjacency
240 * for each concerned interface. If we don't care, there is a risk to run out of
243 * For that purpose, a similar principle as already provided to manage chunk of
244 * label is proposed. But, here, the label chunk has not a fix range of 64
245 * labels that could be easily manage with a single variable of 64 bits size.
246 * So, used_mark is used as a bit wise to mark label reserved (bit set) or not
247 * (bit unset). Its size is equal to the number of label of the SRLB range round
250 * - sr__local_block_init() computes the number of 64 bits variables that are
251 * needed to manage the SRLB range and allocates this number.
252 * - ospf_sr_local_block_request_label() pick up the first available label and
253 * set corresponding bit
254 * - ospf_sr_local_block_release_label() release label by reseting the
255 * corresponding bit and set the next label to the first free position
259 * Initialize Segment Routing Local Block from SRDB configuration and reserve
260 * block of bits to manage label allocation.
262 * @param lower_bound The lower bound of the SRLB range
263 * @param upper_bound The upper bound of the SRLB range
265 * @return 0 on success, -1 otherwise
267 static int sr_local_block_init(uint32_t lower_bound
, uint32_t upper_bound
)
269 struct sr_local_block
*srlb
= &OspfSR
.srlb
;
272 /* Check if SRLB is not already configured */
277 * Request SRLB to the label manager. If the allocation fails, return
278 * an error to disable SR until a new SRLB is successfully allocated.
280 size
= upper_bound
- lower_bound
+ 1;
281 if (ospf_zebra_request_label_range(lower_bound
, size
)) {
282 zlog_err("SR: Error reserving SRLB [%u/%u] %u labels",
283 lower_bound
, upper_bound
, size
);
287 osr_debug("SR: Got new SRLB [%u/%u], %u labels", lower_bound
,
290 /* Initialize the SRLB */
291 srlb
->start
= lower_bound
;
292 srlb
->end
= upper_bound
;
295 /* Compute the needed Used Mark number and allocate them */
296 srlb
->max_block
= size
/ SRLB_BLOCK_SIZE
;
297 if ((size
% SRLB_BLOCK_SIZE
) != 0)
299 srlb
->used_mark
= XCALLOC(MTYPE_OSPF_SR_PARAMS
,
300 srlb
->max_block
* SRLB_BLOCK_SIZE
);
301 srlb
->reserved
= true;
306 static int sr_global_block_init(uint32_t start
, uint32_t size
)
308 struct sr_global_block
*srgb
= &OspfSR
.srgb
;
310 /* Check if already configured */
315 uint32_t end
= start
+ size
- 1;
316 if (ospf_zebra_request_label_range(start
, size
) < 0) {
317 zlog_err("SR: Error reserving SRGB [%u/%u], %u labels", start
,
322 osr_debug("SR: Got new SRGB [%u/%u], %u labels", start
, end
, size
);
327 srgb
->reserved
= true;
332 * Remove Segment Routing Local Block.
335 static void sr_local_block_delete(void)
337 struct sr_local_block
*srlb
= &OspfSR
.srlb
;
339 /* Check if SRLB is not already delete */
343 osr_debug("SR (%s): Remove SRLB [%u/%u]", __func__
, srlb
->start
,
346 /* First release the label block */
347 ospf_zebra_release_label_range(srlb
->start
, srlb
->end
);
349 /* Then reset SRLB structure */
350 if (srlb
->used_mark
!= NULL
)
351 XFREE(MTYPE_OSPF_SR_PARAMS
, srlb
->used_mark
);
353 srlb
->reserved
= false;
357 * Remove Segment Routing Global block
359 static void sr_global_block_delete(void)
361 struct sr_global_block
*srgb
= &OspfSR
.srgb
;
366 osr_debug("SR (%s): Remove SRGB [%u/%u]", __func__
, srgb
->start
,
367 srgb
->start
+ srgb
->size
- 1);
369 ospf_zebra_release_label_range(srgb
->start
,
370 srgb
->start
+ srgb
->size
- 1);
372 srgb
->reserved
= false;
377 * Request a label from the Segment Routing Local Block.
379 * @return First available label on success or MPLS_INVALID_LABEL if the
380 * block of labels is full
382 mpls_label_t
ospf_sr_local_block_request_label(void)
384 struct sr_local_block
*srlb
= &OspfSR
.srlb
;
388 uint32_t size
= srlb
->end
- srlb
->start
+ 1;
390 /* Check if we ran out of available labels */
391 if (srlb
->current
>= size
)
392 return MPLS_INVALID_LABEL
;
394 /* Get first available label and mark it used */
395 label
= srlb
->current
+ srlb
->start
;
396 index
= srlb
->current
/ SRLB_BLOCK_SIZE
;
397 pos
= 1ULL << (srlb
->current
% SRLB_BLOCK_SIZE
);
398 srlb
->used_mark
[index
] |= pos
;
400 /* Jump to the next free position */
402 pos
= srlb
->current
% SRLB_BLOCK_SIZE
;
403 while (srlb
->current
< size
) {
406 if (!((1ULL << pos
) & srlb
->used_mark
[index
]))
410 pos
= srlb
->current
% SRLB_BLOCK_SIZE
;
414 if (srlb
->current
== size
)
416 "SR: Warning, SRLB is depleted and next label request will fail");
422 * Release label in the Segment Routing Local Block.
424 * @param label Label to be release
426 * @return 0 on success or -1 if label falls outside SRLB
428 int ospf_sr_local_block_release_label(mpls_label_t label
)
430 struct sr_local_block
*srlb
= &OspfSR
.srlb
;
434 /* Check that label falls inside the SRLB */
435 if ((label
< srlb
->start
) || (label
> srlb
->end
)) {
436 flog_warn(EC_OSPF_SR_SID_OVERFLOW
,
437 "%s: Returning label %u is outside SRLB [%u/%u]",
438 __func__
, label
, srlb
->start
, srlb
->end
);
442 index
= (label
- srlb
->start
) / SRLB_BLOCK_SIZE
;
443 pos
= 1ULL << ((label
- srlb
->start
) % SRLB_BLOCK_SIZE
);
444 srlb
->used_mark
[index
] &= ~pos
;
445 /* Reset current to the first available position */
446 for (index
= 0; index
< srlb
->max_block
; index
++) {
447 if (srlb
->used_mark
[index
] != 0xFFFFFFFFFFFFFFFF) {
448 for (pos
= 0; pos
< SRLB_BLOCK_SIZE
; pos
++)
449 if (!((1ULL << pos
) & srlb
->used_mark
[index
])) {
451 index
* SRLB_BLOCK_SIZE
+ pos
;
462 * Segment Routing Initialization functions
466 * Thread function to re-attempt connection to the Label Manager and thus be
467 * able to start Segment Routing.
469 * @param start Thread structure that contains area as argument
471 * @return 1 on success
473 static void sr_start_label_manager(struct thread
*start
)
477 ospf
= THREAD_ARG(start
);
479 /* re-attempt to start SR & Label Manager connection */
483 /* Segment Routing starter function */
484 static int ospf_sr_start(struct ospf
*ospf
)
486 struct route_node
*rn
;
487 struct ospf_lsa
*lsa
;
491 osr_debug("SR (%s): Start Segment Routing", __func__
);
493 /* Initialize self SR Node if not already done */
494 if (OspfSR
.self
== NULL
) {
495 srn
= hash_get(OspfSR
.neighbors
, (void *)&(ospf
->router_id
),
496 (void *)sr_node_new
);
498 /* Complete & Store self SR Node */
499 srn
->srgb
.range_size
= OspfSR
.srgb
.size
;
500 srn
->srgb
.lower_bound
= OspfSR
.srgb
.start
;
501 srn
->srlb
.lower_bound
= OspfSR
.srlb
.start
;
502 srn
->srlb
.range_size
= OspfSR
.srlb
.end
- OspfSR
.srlb
.start
+ 1;
503 srn
->algo
[0] = OspfSR
.algo
[0];
504 srn
->msd
= OspfSR
.msd
;
508 /* Then, start Label Manager if not ready */
509 if (!ospf_zebra_label_manager_ready())
510 if (ospf_zebra_label_manager_connect() < 0) {
511 /* Re-attempt to connect to Label Manager in 1 sec. */
512 thread_add_timer(master
, sr_start_label_manager
, ospf
,
513 1, &OspfSR
.t_start_lm
);
514 osr_debug(" |- Failed to start the Label Manager");
519 * Request SRLB & SGRB to the label manager if not already reserved.
520 * If the allocation fails, return an error to disable SR until a new
521 * SRLB and/or SRGB are successfully allocated.
523 if (sr_local_block_init(OspfSR
.srlb
.start
, OspfSR
.srlb
.end
) < 0)
526 if (sr_global_block_init(OspfSR
.srgb
.start
, OspfSR
.srgb
.size
) < 0)
529 /* SR is UP and ready to flood LSA */
530 OspfSR
.status
= SR_UP
;
532 /* Set Router Information SR parameters */
533 osr_debug("SR: Activate SR for Router Information LSA");
535 ospf_router_info_update_sr(true, OspfSR
.self
);
538 osr_debug("SR: Activate SR for Extended Link/Prefix LSA");
540 ospf_ext_update_sr(true);
542 osr_debug("SR (%s): Update SR-DB from LSDB", __func__
);
544 /* Start by looking to Router Info & Extended LSA in lsdb */
545 if ((ospf
!= NULL
) && (ospf
->backbone
!= NULL
)) {
546 LSDB_LOOP (OPAQUE_AREA_LSDB(ospf
->backbone
), rn
, lsa
) {
547 if (IS_LSA_MAXAGE(lsa
) || IS_LSA_SELF(lsa
))
550 GET_OPAQUE_TYPE(ntohl(lsa
->data
->id
.s_addr
));
552 case OPAQUE_TYPE_ROUTER_INFORMATION_LSA
:
553 ospf_sr_ri_lsa_update(lsa
);
555 case OPAQUE_TYPE_EXTENDED_PREFIX_LSA
:
556 ospf_sr_ext_prefix_lsa_update(lsa
);
558 case OPAQUE_TYPE_EXTENDED_LINK_LSA
:
559 ospf_sr_ext_link_lsa_update(lsa
);
571 /* Stop Segment Routing */
572 static void ospf_sr_stop(void)
575 if (OspfSR
.status
== SR_OFF
)
578 osr_debug("SR (%s): Stop Segment Routing", __func__
);
580 /* Disable any re-attempt to connect to Label Manager */
581 THREAD_OFF(OspfSR
.t_start_lm
);
583 /* Release SRGB if active */
584 sr_global_block_delete();
586 /* Release SRLB if active */
587 sr_local_block_delete();
590 * Remove all SR Nodes from the Hash table. Prefix and Link SID will
591 * be remove though list_delete() call. See sr_node_del()
593 hash_clean(OspfSR
.neighbors
, (void *)sr_node_del
);
595 OspfSR
.status
= SR_OFF
;
599 * Segment Routing initialize function
603 * @return 0 if OK, -1 otherwise
605 int ospf_sr_init(void)
609 osr_debug("SR (%s): Initialize SR Data Base", __func__
);
611 memset(&OspfSR
, 0, sizeof(OspfSR
));
612 OspfSR
.status
= SR_OFF
;
613 /* Only AREA flooding is supported in this release */
614 OspfSR
.scope
= OSPF_OPAQUE_AREA_LSA
;
616 /* Initialize Algorithms, SRGB, SRLB and MSD TLVs */
617 /* Only Algorithm SPF is supported */
618 OspfSR
.algo
[0] = SR_ALGORITHM_SPF
;
619 for (int i
= 1; i
< ALGORITHM_COUNT
; i
++)
620 OspfSR
.algo
[i
] = SR_ALGORITHM_UNSET
;
622 OspfSR
.srgb
.size
= DEFAULT_SRGB_SIZE
;
623 OspfSR
.srgb
.start
= DEFAULT_SRGB_LABEL
;
624 OspfSR
.srgb
.reserved
= false;
626 OspfSR
.srlb
.start
= DEFAULT_SRLB_LABEL
;
627 OspfSR
.srlb
.end
= DEFAULT_SRLB_END
;
628 OspfSR
.srlb
.reserved
= false;
631 /* Initialize Hash table for neighbor SR nodes */
632 OspfSR
.neighbors
= hash_create(sr_hash
, sr_cmp
, "OSPF_SR");
633 if (OspfSR
.neighbors
== NULL
)
636 /* Register Segment Routing VTY command */
637 ospf_sr_register_vty();
644 * Segment Routing termination function
649 void ospf_sr_term(void)
652 /* Stop Segment Routing */
655 /* Clear SR Node Table */
656 if (OspfSR
.neighbors
)
657 hash_free(OspfSR
.neighbors
);
662 * Segment Routing finish function
667 void ospf_sr_finish(void)
669 /* Stop Segment Routing */
674 * Following functions are used to manipulate the
675 * Next Hop Label Forwarding entry (NHLFE)
678 /* Compute label from index */
679 static mpls_label_t
index2label(uint32_t index
, struct sr_block srgb
)
683 label
= srgb
.lower_bound
+ index
;
684 if (label
> (srgb
.lower_bound
+ srgb
.range_size
)) {
685 flog_warn(EC_OSPF_SR_SID_OVERFLOW
,
686 "%s: SID index %u falls outside SRGB range",
688 return MPLS_INVALID_LABEL
;
693 /* Get the prefix sid for a specific router id */
694 mpls_label_t
ospf_sr_get_prefix_sid_by_id(struct in_addr
*id
)
697 struct sr_prefix
*srp
;
700 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
, id
);
704 * TODO: Here we assume that the SRGBs are the same,
705 * and that the node's prefix SID is at the head of
706 * the list, probably needs tweaking.
708 srp
= listnode_head(srn
->ext_prefix
);
709 label
= index2label(srp
->sid
, srn
->srgb
);
711 label
= MPLS_INVALID_LABEL
;
717 /* Get the adjacency sid for a specific 'root' id and 'neighbor' id */
718 mpls_label_t
ospf_sr_get_adj_sid_by_id(struct in_addr
*root_id
,
719 struct in_addr
*neighbor_id
)
724 struct listnode
*node
;
726 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
, root_id
);
728 label
= MPLS_INVALID_LABEL
;
731 for (ALL_LIST_ELEMENTS_RO(srn
->ext_link
, node
, srl
)) {
732 if (srl
->type
== ADJ_SID
733 && srl
->remote_id
.s_addr
== neighbor_id
->s_addr
) {
743 /* Get neighbor full structure from address */
744 static struct ospf_neighbor
*get_neighbor_by_addr(struct ospf
*top
,
747 struct ospf_neighbor
*nbr
;
748 struct ospf_interface
*oi
;
749 struct listnode
*node
;
750 struct route_node
*rn
;
756 for (ALL_LIST_ELEMENTS_RO(top
->oiflist
, node
, oi
))
757 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
)) {
762 if (IPV4_ADDR_SAME(&nbr
->address
.u
.prefix4
, &addr
) ||
763 IPV4_ADDR_SAME(&nbr
->router_id
, &addr
)) {
764 route_unlock_node(rn
);
771 /* Get OSPF Path from address */
772 static struct ospf_route
*get_nexthop_by_addr(struct ospf
*top
,
773 struct prefix_ipv4 p
)
775 struct route_node
*rn
;
781 osr_debug(" |- Search Nexthop for prefix %pFX",
782 (struct prefix
*)&p
);
784 rn
= route_node_lookup(top
->new_table
, (struct prefix
*)&p
);
787 * Check if we found an OSPF route. May be NULL if SPF has not
788 * yet populate routing table for this prefix.
793 route_unlock_node(rn
);
797 /* Compute NHLFE entry for Extended Link */
798 static int compute_link_nhlfe(struct sr_link
*srl
)
800 struct ospf
*top
= ospf_lookup_by_vrf_id(VRF_DEFAULT
);
801 struct ospf_neighbor
*nh
;
804 osr_debug(" |- Compute NHLFE for link %pI4", &srl
->itf_addr
);
806 /* First determine the OSPF Neighbor */
807 nh
= get_neighbor_by_addr(top
, srl
->nhlfe
[0].nexthop
);
809 /* Neighbor could be not found when OSPF Adjacency just fire up
810 * because SPF don't yet populate routing table. This NHLFE will
811 * be fixed later when SR SPF schedule will be called.
816 osr_debug(" |- Found nexthop %pI4", &nh
->router_id
);
818 /* Set ifindex for this neighbor */
819 srl
->nhlfe
[0].ifindex
= nh
->oi
->ifp
->ifindex
;
820 srl
->nhlfe
[1].ifindex
= nh
->oi
->ifp
->ifindex
;
822 /* Update neighbor address for LAN_ADJ_SID */
823 if (srl
->type
== LAN_ADJ_SID
) {
824 IPV4_ADDR_COPY(&srl
->nhlfe
[0].nexthop
, &nh
->src
);
825 IPV4_ADDR_COPY(&srl
->nhlfe
[1].nexthop
, &nh
->src
);
828 /* Set Input & Output Label */
829 if (CHECK_FLAG(srl
->flags
[0], EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
830 srl
->nhlfe
[0].label_in
= srl
->sid
[0];
832 srl
->nhlfe
[0].label_in
=
833 index2label(srl
->sid
[0], srl
->srn
->srgb
);
834 if (CHECK_FLAG(srl
->flags
[1], EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
835 srl
->nhlfe
[1].label_in
= srl
->sid
[1];
837 srl
->nhlfe
[1].label_in
=
838 index2label(srl
->sid
[1], srl
->srn
->srgb
);
840 srl
->nhlfe
[0].label_out
= MPLS_LABEL_IMPLICIT_NULL
;
841 srl
->nhlfe
[1].label_out
= MPLS_LABEL_IMPLICIT_NULL
;
848 * Compute output label for the given Prefix-SID.
850 * @param srp Segment Routing Prefix
851 * @param srnext Segment Routing nexthop node
853 * @return MPLS label or MPLS_INVALID_LABEL in case of error
855 static mpls_label_t
sr_prefix_out_label(const struct sr_prefix
*srp
,
856 const struct sr_node
*srnext
)
858 /* Check if the nexthop SR Node is the last hop? */
859 if (srnext
== srp
->srn
) {
860 /* SR-Node doesn't request NO-PHP. Return Implicit NULL label */
861 if (!CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
))
862 return MPLS_LABEL_IMPLICIT_NULL
;
864 /* SR-Node requests Explicit NULL Label */
865 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_EFLG
))
866 return MPLS_LABEL_IPV4_EXPLICIT_NULL
;
870 /* Return SID value as MPLS label if it is an Absolute SID */
871 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_VFLG
872 | EXT_SUBTLV_PREFIX_SID_LFLG
)) {
874 * V/L SIDs have local significance, so only adjacent routers
875 * can use them (RFC8665 section #5)
877 if (srp
->srn
!= srnext
)
878 return MPLS_INVALID_LABEL
;
882 /* Return MPLS label as SRGB lower bound + SID index as per RFC 8665 */
883 return (index2label(srp
->sid
, srnext
->srgb
));
887 * Compute NHLFE entry for Extended Prefix
889 * @param srp - Segment Routing Prefix
891 * @return -1 if no route is found, 0 if there is no SR route ready
892 * and 1 if success or update
894 static int compute_prefix_nhlfe(struct sr_prefix
*srp
)
896 struct ospf
*top
= ospf_lookup_by_vrf_id(VRF_DEFAULT
);
897 struct ospf_path
*path
;
898 struct listnode
*node
;
899 struct sr_node
*srnext
;
902 osr_debug(" |- Compute NHLFE for prefix %pFX",
903 (struct prefix
*)&srp
->prefv4
);
906 /* First determine the nexthop */
907 srp
->route
= get_nexthop_by_addr(top
, srp
->prefv4
);
909 /* Nexthop could be not found when OSPF Adjacency just fire up
910 * because SPF don't yet populate routing table. This NHLFE will
911 * be fixed later when SR SPF schedule will be called.
913 if (srp
->route
== NULL
)
916 /* Compute Input Label with self SRGB */
917 srp
->label_in
= index2label(srp
->sid
, OspfSR
.self
->srgb
);
920 for (ALL_LIST_ELEMENTS_RO(srp
->route
->paths
, node
, path
)) {
922 osr_debug(" |- Process new route via %pI4 for this prefix",
926 * Get SR-Node for this nexthop. Could be not yet available
927 * as Extended Link / Prefix and Router Information are flooded
928 * after LSA Type 1 & 2 which populate the OSPF Route Table
930 srnext
= get_sr_node_by_nexthop(top
, path
->nexthop
);
934 /* And store this information for later update */
935 srnext
->neighbor
= OspfSR
.self
;
936 path
->srni
.nexthop
= srnext
;
939 * SR Node could be known, but SRGB could be not initialize
940 * This is due to the fact that Extended Link / Prefix could
941 * be received before corresponding Router Information LSA
943 if (srnext
== NULL
|| srnext
->srgb
.lower_bound
== 0
944 || srnext
->srgb
.range_size
== 0) {
946 " |- SR-Node %pI4 not ready. Stop process",
947 &srnext
->adv_router
);
948 path
->srni
.label_out
= MPLS_INVALID_LABEL
;
952 osr_debug(" |- Found SRGB %u/%u for next hop SR-Node %pI4",
953 srnext
->srgb
.range_size
, srnext
->srgb
.lower_bound
,
954 &srnext
->adv_router
);
956 /* Compute Output Label with Nexthop SR Node SRGB */
957 path
->srni
.label_out
= sr_prefix_out_label(srp
, srnext
);
959 osr_debug(" |- Computed new labels in: %u out: %u",
960 srp
->label_in
, path
->srni
.label_out
);
966 /* Add new NHLFE entry for Adjacency SID */
967 static inline void add_adj_sid(struct sr_nhlfe nhlfe
)
969 if (nhlfe
.label_in
!= 0)
970 ospf_zebra_send_adjacency_sid(ZEBRA_MPLS_LABELS_ADD
, nhlfe
);
973 /* Remove NHLFE entry for Adjacency SID */
974 static inline void del_adj_sid(struct sr_nhlfe nhlfe
)
976 if (nhlfe
.label_in
!= 0)
977 ospf_zebra_send_adjacency_sid(ZEBRA_MPLS_LABELS_DELETE
, nhlfe
);
980 /* Update NHLFE entry for Adjacency SID */
981 static inline void update_adj_sid(struct sr_nhlfe n1
, struct sr_nhlfe n2
)
988 * Functions to parse and get Extended Link / Prefix
992 /* Extended Link SubTLVs Getter */
993 static struct sr_link
*get_ext_link_sid(struct tlv_header
*tlvh
, size_t size
)
997 struct ext_tlv_link
*link
= (struct ext_tlv_link
*)tlvh
;
998 struct ext_subtlv_adj_sid
*adj_sid
;
999 struct ext_subtlv_lan_adj_sid
*lan_sid
;
1000 struct ext_subtlv_rmt_itf_addr
*rmt_itf
;
1002 struct tlv_header
*sub_tlvh
;
1003 uint16_t length
= 0, sum
= 0, i
= 0;
1005 /* Check TLV size */
1006 if ((ntohs(tlvh
->length
) > size
)
1007 || ntohs(tlvh
->length
) < EXT_TLV_LINK_SIZE
) {
1008 zlog_warn("Wrong Extended Link TLV size. Abort!");
1012 srl
= XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_link
));
1014 /* Initialize TLV browsing */
1015 length
= ntohs(tlvh
->length
) - EXT_TLV_LINK_SIZE
;
1016 sub_tlvh
= (struct tlv_header
*)((char *)(tlvh
) + TLV_HDR_SIZE
1017 + EXT_TLV_LINK_SIZE
);
1018 for (; sum
< length
&& sub_tlvh
; sub_tlvh
= TLV_HDR_NEXT(sub_tlvh
)) {
1019 switch (ntohs(sub_tlvh
->type
)) {
1020 case EXT_SUBTLV_ADJ_SID
:
1021 adj_sid
= (struct ext_subtlv_adj_sid
*)sub_tlvh
;
1022 srl
->type
= ADJ_SID
;
1023 i
= CHECK_FLAG(adj_sid
->flags
,
1024 EXT_SUBTLV_LINK_ADJ_SID_BFLG
)
1027 srl
->flags
[i
] = adj_sid
->flags
;
1028 if (CHECK_FLAG(adj_sid
->flags
,
1029 EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
1030 srl
->sid
[i
] = GET_LABEL(ntohl(adj_sid
->value
));
1032 srl
->sid
[i
] = ntohl(adj_sid
->value
);
1033 IPV4_ADDR_COPY(&srl
->nhlfe
[i
].nexthop
, &link
->link_id
);
1035 case EXT_SUBTLV_LAN_ADJ_SID
:
1036 lan_sid
= (struct ext_subtlv_lan_adj_sid
*)sub_tlvh
;
1037 srl
->type
= LAN_ADJ_SID
;
1038 i
= CHECK_FLAG(lan_sid
->flags
,
1039 EXT_SUBTLV_LINK_ADJ_SID_BFLG
)
1042 srl
->flags
[i
] = lan_sid
->flags
;
1043 if (CHECK_FLAG(lan_sid
->flags
,
1044 EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
1045 srl
->sid
[i
] = GET_LABEL(ntohl(lan_sid
->value
));
1047 srl
->sid
[i
] = ntohl(lan_sid
->value
);
1048 IPV4_ADDR_COPY(&srl
->nhlfe
[i
].nexthop
,
1049 &lan_sid
->neighbor_id
);
1051 case EXT_SUBTLV_RMT_ITF_ADDR
:
1052 rmt_itf
= (struct ext_subtlv_rmt_itf_addr
*)sub_tlvh
;
1053 IPV4_ADDR_COPY(&srl
->nhlfe
[0].nexthop
, &rmt_itf
->value
);
1054 IPV4_ADDR_COPY(&srl
->nhlfe
[1].nexthop
, &rmt_itf
->value
);
1059 sum
+= TLV_SIZE(sub_tlvh
);
1062 IPV4_ADDR_COPY(&srl
->itf_addr
, &link
->link_data
);
1064 osr_debug(" |- Found primary %u and backup %u Adj/Lan Sid for %pI4",
1065 srl
->sid
[0], srl
->sid
[1], &srl
->itf_addr
);
1070 /* Extended Prefix SubTLVs Getter */
1071 static struct sr_prefix
*get_ext_prefix_sid(struct tlv_header
*tlvh
,
1075 struct sr_prefix
*srp
;
1076 struct ext_tlv_prefix
*pref
= (struct ext_tlv_prefix
*)tlvh
;
1077 struct ext_subtlv_prefix_sid
*psid
;
1079 struct tlv_header
*sub_tlvh
;
1080 uint16_t length
= 0, sum
= 0;
1082 /* Check TLV size */
1083 if ((ntohs(tlvh
->length
) > size
)
1084 || ntohs(tlvh
->length
) < EXT_TLV_PREFIX_SIZE
) {
1085 zlog_warn("Wrong Extended Link TLV size. Abort!");
1089 srp
= XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_prefix
));
1091 /* Initialize TLV browsing */
1092 length
= ntohs(tlvh
->length
) - EXT_TLV_PREFIX_SIZE
;
1093 sub_tlvh
= (struct tlv_header
*)((char *)(tlvh
) + TLV_HDR_SIZE
1094 + EXT_TLV_PREFIX_SIZE
);
1095 for (; sum
< length
&& sub_tlvh
; sub_tlvh
= TLV_HDR_NEXT(sub_tlvh
)) {
1096 switch (ntohs(sub_tlvh
->type
)) {
1097 case EXT_SUBTLV_PREFIX_SID
:
1098 psid
= (struct ext_subtlv_prefix_sid
*)sub_tlvh
;
1099 if (psid
->algorithm
!= SR_ALGORITHM_SPF
) {
1100 flog_err(EC_OSPF_INVALID_ALGORITHM
,
1101 "SR (%s): Unsupported Algorithm",
1103 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
1106 srp
->type
= PREF_SID
;
1107 srp
->flags
= psid
->flags
;
1108 if (CHECK_FLAG(psid
->flags
, EXT_SUBTLV_PREFIX_SID_VFLG
))
1109 srp
->sid
= GET_LABEL(ntohl(psid
->value
));
1111 srp
->sid
= ntohl(psid
->value
);
1112 IPV4_ADDR_COPY(&srp
->prefv4
.prefix
, &pref
->address
);
1113 srp
->prefv4
.prefixlen
= pref
->pref_length
;
1114 srp
->prefv4
.family
= AF_INET
;
1115 apply_mask_ipv4(&srp
->prefv4
);
1120 sum
+= TLV_SIZE(sub_tlvh
);
1123 osr_debug(" |- Found SID %u for prefix %pFX", srp
->sid
,
1124 (struct prefix
*)&srp
->prefv4
);
1130 * Functions to manipulate Segment Routing Link & Prefix structures
1133 /* Compare two Segment Link: return 0 if equal, 1 otherwise */
1134 static inline int sr_link_cmp(struct sr_link
*srl1
, struct sr_link
*srl2
)
1136 if ((srl1
->sid
[0] == srl2
->sid
[0]) && (srl1
->sid
[1] == srl2
->sid
[1])
1137 && (srl1
->type
== srl2
->type
) && (srl1
->flags
[0] == srl2
->flags
[0])
1138 && (srl1
->flags
[1] == srl2
->flags
[1]))
1144 /* Compare two Segment Prefix: return 0 if equal, 1 otherwise */
1145 static inline int sr_prefix_cmp(struct sr_prefix
*srp1
, struct sr_prefix
*srp2
)
1147 if ((srp1
->sid
== srp2
->sid
) && (srp1
->flags
== srp2
->flags
))
1153 /* Update Segment Link of given Segment Routing Node */
1154 static void update_ext_link_sid(struct sr_node
*srn
, struct sr_link
*srl
,
1157 struct listnode
*node
;
1163 if ((srn
== NULL
) || (srl
== NULL
))
1166 osr_debug(" |- Process Extended Link Adj/Lan-SID");
1168 /* Detect if Adj/Lan_Adj SID must be configured */
1169 if (!CHECK_FLAG(lsa_flags
, OSPF_LSA_SELF
)
1170 && (CHECK_FLAG(srl
->flags
[0], EXT_SUBTLV_LINK_ADJ_SID_LFLG
)
1171 || CHECK_FLAG(srl
->flags
[1], EXT_SUBTLV_LINK_ADJ_SID_LFLG
)))
1174 /* Search for existing Segment Link */
1175 for (ALL_LIST_ELEMENTS_RO(srn
->ext_link
, node
, lk
))
1176 if (lk
->instance
== srl
->instance
) {
1181 osr_debug(" |- %s SR Link 8.0.0.%u for SR node %pI4",
1182 found
? "Update" : "Add", GET_OPAQUE_ID(srl
->instance
),
1185 /* if not found, add new Segment Link and install NHLFE */
1187 /* Complete SR-Link and add it to SR-Node list */
1189 IPV4_ADDR_COPY(&srl
->adv_router
, &srn
->adv_router
);
1190 listnode_add(srn
->ext_link
, srl
);
1191 /* Try to set MPLS table */
1192 if (config
&& compute_link_nhlfe(srl
)) {
1193 add_adj_sid(srl
->nhlfe
[0]);
1194 add_adj_sid(srl
->nhlfe
[1]);
1197 /* Update SR-Link if they are different */
1198 if (sr_link_cmp(lk
, srl
)) {
1199 /* Try to set MPLS table */
1201 if (compute_link_nhlfe(srl
)) {
1202 update_adj_sid(lk
->nhlfe
[0],
1204 update_adj_sid(lk
->nhlfe
[1],
1207 del_adj_sid(lk
->nhlfe
[0]);
1208 del_adj_sid(lk
->nhlfe
[1]);
1211 /* Replace SR-Link in SR-Node Adjacency List */
1212 listnode_delete(srn
->ext_link
, lk
);
1213 XFREE(MTYPE_OSPF_SR_PARAMS
, lk
);
1215 IPV4_ADDR_COPY(&srl
->adv_router
, &srn
->adv_router
);
1216 listnode_add(srn
->ext_link
, srl
);
1219 * This is just an LSA refresh.
1220 * Stop processing and free SR Link
1222 XFREE(MTYPE_OSPF_SR_PARAMS
, srl
);
1227 /* Update Segment Prefix of given Segment Routing Node */
1228 static void update_ext_prefix_sid(struct sr_node
*srn
, struct sr_prefix
*srp
)
1231 struct listnode
*node
;
1232 struct sr_prefix
*pref
;
1236 if (srn
== NULL
|| srp
== NULL
)
1239 osr_debug(" |- Process Extended Prefix SID %u", srp
->sid
);
1241 /* Process only Global Prefix SID */
1242 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_LFLG
))
1245 /* Search for existing Segment Prefix */
1246 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, pref
))
1247 if (pref
->instance
== srp
->instance
1248 && prefix_same((struct prefix
*)&srp
->prefv4
,
1254 osr_debug(" |- %s SR LSA ID 7.0.0.%u for SR node %pI4",
1255 found
? "Update" : "Add", GET_OPAQUE_ID(srp
->instance
),
1258 /* Complete SR-Prefix */
1260 IPV4_ADDR_COPY(&srp
->adv_router
, &srn
->adv_router
);
1262 /* if not found, add new Segment Prefix and install NHLFE */
1264 /* Add it to SR-Node list ... */
1265 listnode_add(srn
->ext_prefix
, srp
);
1266 /* ... and try to set MPLS table */
1267 if (compute_prefix_nhlfe(srp
) == 1)
1268 ospf_zebra_update_prefix_sid(srp
);
1271 * An old SR prefix exist. Check if something changes or if it
1272 * is just a refresh.
1274 if (sr_prefix_cmp(pref
, srp
)) {
1275 if (compute_prefix_nhlfe(srp
) == 1) {
1276 ospf_zebra_delete_prefix_sid(pref
);
1277 /* Replace Segment Prefix */
1278 listnode_delete(srn
->ext_prefix
, pref
);
1279 XFREE(MTYPE_OSPF_SR_PARAMS
, pref
);
1280 listnode_add(srn
->ext_prefix
, srp
);
1281 ospf_zebra_update_prefix_sid(srp
);
1283 /* New NHLFE was not found.
1284 * Just free the SR Prefix
1286 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
1289 /* This is just an LSA refresh.
1290 * Stop processing and free SR Prefix
1292 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
1298 * When change the FRR Self SRGB, update the NHLFE Input Label
1299 * for all Extended Prefix with SID index through hash_iterate()
1301 static void update_in_nhlfe(struct hash_bucket
*bucket
, void *args
)
1303 struct listnode
*node
;
1304 struct sr_node
*srn
= (struct sr_node
*)bucket
->data
;
1305 struct sr_prefix
*srp
;
1307 /* Process Every Extended Prefix for this SR-Node */
1308 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
1309 /* Process Self SRN only if NO-PHP is requested */
1310 if ((srn
== OspfSR
.self
)
1311 && !CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
))
1314 /* Process only SID Index */
1315 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_VFLG
))
1318 /* First, remove old MPLS table entries ... */
1319 ospf_zebra_delete_prefix_sid(srp
);
1320 /* ... then compute new input label ... */
1321 srp
->label_in
= index2label(srp
->sid
, OspfSR
.self
->srgb
);
1322 /* ... and install new MPLS LFIB */
1323 ospf_zebra_update_prefix_sid(srp
);
1328 * When SRGB has changed, update NHLFE Output Label for all Extended Prefix
1329 * with SID index which use the given SR-Node as nexthop through hash_iterate()
1331 static void update_out_nhlfe(struct hash_bucket
*bucket
, void *args
)
1333 struct listnode
*node
, *pnode
;
1334 struct sr_node
*srn
= (struct sr_node
*)bucket
->data
;
1335 struct sr_node
*srnext
= (struct sr_node
*)args
;
1336 struct sr_prefix
*srp
;
1337 struct ospf_path
*path
;
1339 /* Skip Self SR-Node */
1340 if (srn
== OspfSR
.self
)
1343 osr_debug("SR (%s): Update Out NHLFE for neighbor SR-Node %pI4",
1344 __func__
, &srn
->adv_router
);
1346 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
1347 /* Skip Prefix that has not yet a valid route */
1348 if (srp
->route
== NULL
)
1351 for (ALL_LIST_ELEMENTS_RO(srp
->route
->paths
, pnode
, path
)) {
1352 /* Skip path that has not next SR-Node as nexthop */
1353 if (path
->srni
.nexthop
!= srnext
)
1356 /* Compute new Output Label */
1357 path
->srni
.label_out
= sr_prefix_out_label(srp
, srnext
);
1360 /* Finally update MPLS table */
1361 ospf_zebra_update_prefix_sid(srp
);
1366 * Following functions are call when new Segment Routing LSA are received
1367 * - Router Information: ospf_sr_ri_lsa_update() & ospf_sr_ri_lsa_delete()
1368 * - Extended Link: ospf_sr_ext_link_update() & ospf_sr_ext_link_delete()
1369 * - Extended Prefix: ospf_ext_prefix_update() & ospf_sr_ext_prefix_delete()
1372 /* Update Segment Routing from Router Information LSA */
1373 void ospf_sr_ri_lsa_update(struct ospf_lsa
*lsa
)
1375 struct sr_node
*srn
;
1376 struct tlv_header
*tlvh
;
1377 struct lsa_header
*lsah
= lsa
->data
;
1378 struct ri_sr_tlv_sid_label_range
*ri_srgb
= NULL
;
1379 struct ri_sr_tlv_sid_label_range
*ri_srlb
= NULL
;
1380 struct ri_sr_tlv_sr_algorithm
*algo
= NULL
;
1381 struct sr_block srgb
;
1382 uint16_t length
= 0, sum
= 0;
1385 osr_debug("SR (%s): Process Router Information LSA 4.0.0.%u from %pI4",
1386 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1390 if (IS_LSA_SELF(lsa
))
1393 if (OspfSR
.neighbors
== NULL
) {
1394 flog_err(EC_OSPF_SR_INVALID_DB
,
1395 "SR (%s): Abort! no valid SR DataBase", __func__
);
1399 /* Search SR Node in hash table from Router ID */
1400 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
,
1404 /* Collect Router Information Sub TLVs */
1405 /* Initialize TLV browsing */
1406 length
= lsa
->size
- OSPF_LSA_HEADER_SIZE
;
1407 srgb
.range_size
= 0;
1408 srgb
.lower_bound
= 0;
1410 for (tlvh
= TLV_HDR_TOP(lsah
); (sum
< length
) && (tlvh
!= NULL
);
1411 tlvh
= TLV_HDR_NEXT(tlvh
)) {
1412 switch (ntohs(tlvh
->type
)) {
1413 case RI_SR_TLV_SR_ALGORITHM
:
1414 algo
= (struct ri_sr_tlv_sr_algorithm
*)tlvh
;
1416 case RI_SR_TLV_SRGB_LABEL_RANGE
:
1417 ri_srgb
= (struct ri_sr_tlv_sid_label_range
*)tlvh
;
1419 case RI_SR_TLV_SRLB_LABEL_RANGE
:
1420 ri_srlb
= (struct ri_sr_tlv_sid_label_range
*)tlvh
;
1422 case RI_SR_TLV_NODE_MSD
:
1423 msd
= ((struct ri_sr_tlv_node_msd
*)(tlvh
))->value
;
1428 sum
+= TLV_SIZE(tlvh
);
1431 /* Check if Segment Routing Capabilities has been found */
1432 if (ri_srgb
== NULL
) {
1433 /* Skip Router Information without SR capabilities
1434 * advertise by a non SR Node */
1438 /* Remove SR Node that advertise Router Information
1439 * without SR capabilities. This could correspond to a
1440 * Node stopping Segment Routing */
1441 hash_release(OspfSR
.neighbors
, &(srn
->adv_router
));
1447 /* Check that RI LSA belongs to the correct SR Node */
1448 if ((srn
!= NULL
) && (srn
->instance
!= 0)
1449 && (srn
->instance
!= ntohl(lsah
->id
.s_addr
))) {
1450 flog_err(EC_OSPF_SR_INVALID_LSA_ID
,
1451 "SR (%s): Abort! Wrong LSA ID 4.0.0.%u for SR node %pI4/%u",
1452 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1453 &lsah
->adv_router
, srn
->instance
);
1457 /* OK. All things look good. Get SRGB */
1458 srgb
.range_size
= GET_RANGE_SIZE(ntohl(ri_srgb
->size
));
1459 srgb
.lower_bound
= GET_LABEL(ntohl(ri_srgb
->lower
.value
));
1461 /* Check if it is a new SR Node or not */
1463 /* Get a new SR Node in hash table from Router ID */
1464 srn
= (struct sr_node
*)hash_get(OspfSR
.neighbors
,
1466 (void *)sr_node_new
);
1468 srn
->instance
= ntohl(lsah
->id
.s_addr
);
1470 srn
->srgb
.range_size
= srgb
.range_size
;
1471 srn
->srgb
.lower_bound
= srgb
.lower_bound
;
1474 /* Update Algorithm, SRLB and MSD if present */
1477 for (i
= 0; i
< ntohs(algo
->header
.length
); i
++)
1478 srn
->algo
[i
] = algo
->value
[0];
1479 for (; i
< ALGORITHM_COUNT
; i
++)
1480 srn
->algo
[i
] = SR_ALGORITHM_UNSET
;
1482 srn
->algo
[0] = SR_ALGORITHM_SPF
;
1485 if (ri_srlb
!= NULL
) {
1486 srn
->srlb
.range_size
= GET_RANGE_SIZE(ntohl(ri_srlb
->size
));
1487 srn
->srlb
.lower_bound
= GET_LABEL(ntohl(ri_srlb
->lower
.value
));
1490 /* Check if SRGB has changed */
1491 if ((srn
->srgb
.range_size
== srgb
.range_size
)
1492 && (srn
->srgb
.lower_bound
== srgb
.lower_bound
))
1496 srn
->srgb
.range_size
= srgb
.range_size
;
1497 srn
->srgb
.lower_bound
= srgb
.lower_bound
;
1499 osr_debug(" |- Update SR-Node[%pI4], SRGB[%u/%u], SRLB[%u/%u], Algo[%u], MSD[%u]",
1500 &srn
->adv_router
, srn
->srgb
.lower_bound
, srn
->srgb
.range_size
,
1501 srn
->srlb
.lower_bound
, srn
->srlb
.range_size
, srn
->algo
[0],
1504 /* ... and NHLFE if it is a neighbor SR node */
1505 if (srn
->neighbor
== OspfSR
.self
)
1506 hash_iterate(OspfSR
.neighbors
, update_out_nhlfe
, srn
);
1510 * Delete SR Node entry in hash table information corresponding to an expired
1511 * Router Information LSA
1513 void ospf_sr_ri_lsa_delete(struct ospf_lsa
*lsa
)
1515 struct sr_node
*srn
;
1516 struct lsa_header
*lsah
= lsa
->data
;
1518 osr_debug("SR (%s): Remove SR node %pI4 from lsa_id 4.0.0.%u", __func__
,
1519 &lsah
->adv_router
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)));
1522 if (OspfSR
.neighbors
== NULL
) {
1523 flog_err(EC_OSPF_SR_INVALID_DB
,
1524 "SR (%s): Abort! no valid SR Data Base", __func__
);
1528 /* Release Router ID entry in SRDB hash table */
1529 srn
= hash_release(OspfSR
.neighbors
, &(lsah
->adv_router
));
1533 flog_err(EC_OSPF_SR_NODE_CREATE
,
1534 "SR (%s): Abort! no entry in SRDB for SR Node %pI4",
1535 __func__
, &lsah
->adv_router
);
1539 if ((srn
->instance
!= 0) && (srn
->instance
!= ntohl(lsah
->id
.s_addr
))) {
1541 EC_OSPF_SR_INVALID_LSA_ID
,
1542 "SR (%s): Abort! Wrong LSA ID 4.0.0.%u for SR node %pI4",
1543 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1548 /* Remove SR node */
1552 /* Update Segment Routing from Extended Link LSA */
1553 void ospf_sr_ext_link_lsa_update(struct ospf_lsa
*lsa
)
1555 struct sr_node
*srn
;
1556 struct tlv_header
*tlvh
;
1557 struct lsa_header
*lsah
= lsa
->data
;
1558 struct sr_link
*srl
;
1562 osr_debug("SR (%s): Process Extended Link LSA 8.0.0.%u from %pI4",
1563 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1567 if (OspfSR
.neighbors
== NULL
) {
1568 flog_err(EC_OSPF_SR_INVALID_DB
,
1569 "SR (%s): Abort! no valid SR DataBase", __func__
);
1573 /* Get SR Node in hash table from Router ID */
1574 srn
= (struct sr_node
*)hash_get(OspfSR
.neighbors
,
1575 (void *)&(lsah
->adv_router
),
1576 (void *)sr_node_new
);
1578 /* Initialize TLV browsing */
1579 length
= lsa
->size
- OSPF_LSA_HEADER_SIZE
;
1580 for (tlvh
= TLV_HDR_TOP(lsah
); length
> 0 && tlvh
;
1581 tlvh
= TLV_HDR_NEXT(tlvh
)) {
1582 if (ntohs(tlvh
->type
) == EXT_TLV_LINK
) {
1583 /* Got Extended Link information */
1584 srl
= get_ext_link_sid(tlvh
, length
);
1585 /* Update SID if not null */
1587 srl
->instance
= ntohl(lsah
->id
.s_addr
);
1588 update_ext_link_sid(srn
, srl
, lsa
->flags
);
1591 length
-= TLV_SIZE(tlvh
);
1595 /* Delete Segment Routing from Extended Link LSA */
1596 void ospf_sr_ext_link_lsa_delete(struct ospf_lsa
*lsa
)
1598 struct listnode
*node
;
1599 struct sr_link
*srl
;
1600 struct sr_node
*srn
;
1601 struct lsa_header
*lsah
= lsa
->data
;
1602 uint32_t instance
= ntohl(lsah
->id
.s_addr
);
1604 osr_debug("SR (%s): Remove Extended Link LSA 8.0.0.%u from %pI4",
1605 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1609 if (OspfSR
.neighbors
== NULL
) {
1610 flog_err(EC_OSPF_SR_INVALID_DB
,
1611 "SR (%s): Abort! no valid SR DataBase", __func__
);
1615 /* Search SR Node in hash table from Router ID */
1616 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
,
1617 (void *)&(lsah
->adv_router
));
1620 * SR-Node may be NULL if it has been remove previously when
1621 * processing Router Information LSA deletion
1624 flog_err(EC_OSPF_SR_INVALID_DB
,
1625 "SR (%s): Stop! no entry in SRDB for SR Node %pI4",
1626 __func__
, &lsah
->adv_router
);
1630 /* Search for corresponding Segment Link */
1631 for (ALL_LIST_ELEMENTS_RO(srn
->ext_link
, node
, srl
))
1632 if (srl
->instance
== instance
)
1635 /* Remove Segment Link if found. Note that for Neighbors, only Global
1636 * Adj/Lan-Adj SID are stored in the SR-DB */
1637 if ((srl
!= NULL
) && (srl
->instance
== instance
)) {
1638 del_adj_sid(srl
->nhlfe
[0]);
1639 del_adj_sid(srl
->nhlfe
[1]);
1640 listnode_delete(srn
->ext_link
, srl
);
1641 XFREE(MTYPE_OSPF_SR_PARAMS
, srl
);
1645 /* Add (LAN)Adjacency-SID from Extended Link Information */
1646 void ospf_sr_ext_itf_add(struct ext_itf
*exti
)
1648 struct sr_node
*srn
= OspfSR
.self
;
1649 struct sr_link
*srl
;
1651 osr_debug("SR (%s): Add Extended Link LSA 8.0.0.%u from self", __func__
,
1658 /* Initialize new Segment Routing Link */
1659 srl
= XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_link
));
1661 srl
->adv_router
= srn
->adv_router
;
1662 srl
->itf_addr
= exti
->link
.link_data
;
1664 SET_OPAQUE_LSID(OPAQUE_TYPE_EXTENDED_LINK_LSA
, exti
->instance
);
1665 srl
->remote_id
= exti
->link
.link_id
;
1666 switch (exti
->stype
) {
1668 srl
->type
= ADJ_SID
;
1669 /* Primary information */
1670 srl
->flags
[0] = exti
->adj_sid
[0].flags
;
1671 if (CHECK_FLAG(exti
->adj_sid
[0].flags
,
1672 EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
1673 srl
->sid
[0] = GET_LABEL(ntohl(exti
->adj_sid
[0].value
));
1675 srl
->sid
[0] = ntohl(exti
->adj_sid
[0].value
);
1676 if (exti
->rmt_itf_addr
.header
.type
== 0)
1677 srl
->nhlfe
[0].nexthop
= exti
->link
.link_id
;
1679 srl
->nhlfe
[0].nexthop
= exti
->rmt_itf_addr
.value
;
1680 /* Backup Information if set */
1681 if (exti
->adj_sid
[1].header
.type
== 0)
1683 srl
->flags
[1] = exti
->adj_sid
[1].flags
;
1684 if (CHECK_FLAG(exti
->adj_sid
[1].flags
,
1685 EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
1686 srl
->sid
[1] = GET_LABEL(ntohl(exti
->adj_sid
[1].value
));
1688 srl
->sid
[1] = ntohl(exti
->adj_sid
[1].value
);
1689 if (exti
->rmt_itf_addr
.header
.type
== 0)
1690 srl
->nhlfe
[1].nexthop
= exti
->link
.link_id
;
1692 srl
->nhlfe
[1].nexthop
= exti
->rmt_itf_addr
.value
;
1695 srl
->type
= LAN_ADJ_SID
;
1696 /* Primary information */
1697 srl
->flags
[0] = exti
->lan_sid
[0].flags
;
1698 if (CHECK_FLAG(exti
->lan_sid
[0].flags
,
1699 EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
1700 srl
->sid
[0] = GET_LABEL(ntohl(exti
->lan_sid
[0].value
));
1702 srl
->sid
[0] = ntohl(exti
->lan_sid
[0].value
);
1703 if (exti
->rmt_itf_addr
.header
.type
== 0)
1704 srl
->nhlfe
[0].nexthop
= exti
->lan_sid
[0].neighbor_id
;
1706 srl
->nhlfe
[0].nexthop
= exti
->rmt_itf_addr
.value
;
1707 /* Backup Information if set */
1708 if (exti
->lan_sid
[1].header
.type
== 0)
1710 srl
->flags
[1] = exti
->lan_sid
[1].flags
;
1711 if (CHECK_FLAG(exti
->lan_sid
[1].flags
,
1712 EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
1713 srl
->sid
[1] = GET_LABEL(ntohl(exti
->lan_sid
[1].value
));
1715 srl
->sid
[1] = ntohl(exti
->lan_sid
[1].value
);
1716 if (exti
->rmt_itf_addr
.header
.type
== 0)
1717 srl
->nhlfe
[1].nexthop
= exti
->lan_sid
[1].neighbor_id
;
1719 srl
->nhlfe
[1].nexthop
= exti
->rmt_itf_addr
.value
;
1723 /* Wrong SID Type. Abort! */
1724 XFREE(MTYPE_OSPF_SR_PARAMS
, srl
);
1728 /* Segment Routing Link is ready, update it */
1729 update_ext_link_sid(srn
, srl
, OSPF_LSA_SELF
);
1732 /* Delete Prefix or (LAN)Adjacency-SID from Extended Link Information */
1733 void ospf_sr_ext_itf_delete(struct ext_itf
*exti
)
1735 struct listnode
*node
;
1736 struct sr_node
*srn
= OspfSR
.self
;
1737 struct sr_prefix
*srp
= NULL
;
1738 struct sr_link
*srl
= NULL
;
1741 osr_debug("SR (%s): Remove Extended LSA %u.0.0.%u from self",
1742 __func__
, exti
->stype
== PREF_SID
? 7 : 8, exti
->instance
);
1744 /* Sanity check: SR-Node and Extended Prefix/Link list may have been
1745 * removed earlier when stopping OSPF or OSPF-SR */
1746 if (srn
== NULL
|| srn
->ext_prefix
== NULL
|| srn
->ext_link
== NULL
)
1749 if (exti
->stype
== PREF_SID
) {
1750 instance
= SET_OPAQUE_LSID(OPAQUE_TYPE_EXTENDED_PREFIX_LSA
,
1752 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
))
1753 if (srp
->instance
== instance
)
1756 /* Uninstall Segment Prefix SID if found */
1757 if ((srp
!= NULL
) && (srp
->instance
== instance
))
1758 ospf_zebra_delete_prefix_sid(srp
);
1760 /* Search for corresponding Segment Link for self SR-Node */
1761 instance
= SET_OPAQUE_LSID(OPAQUE_TYPE_EXTENDED_LINK_LSA
,
1763 for (ALL_LIST_ELEMENTS_RO(srn
->ext_link
, node
, srl
))
1764 if (srl
->instance
== instance
)
1767 /* Remove Segment Link if found */
1768 if ((srl
!= NULL
) && (srl
->instance
== instance
)) {
1769 del_adj_sid(srl
->nhlfe
[0]);
1770 del_adj_sid(srl
->nhlfe
[1]);
1771 listnode_delete(srn
->ext_link
, srl
);
1772 XFREE(MTYPE_OSPF_SR_PARAMS
, srl
);
1777 /* Update Segment Routing from Extended Prefix LSA */
1778 void ospf_sr_ext_prefix_lsa_update(struct ospf_lsa
*lsa
)
1780 struct sr_node
*srn
;
1781 struct tlv_header
*tlvh
;
1782 struct lsa_header
*lsah
= (struct lsa_header
*)lsa
->data
;
1783 struct sr_prefix
*srp
;
1787 osr_debug("SR (%s): Process Extended Prefix LSA 7.0.0.%u from %pI4",
1788 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1792 if (OspfSR
.neighbors
== NULL
) {
1793 flog_err(EC_OSPF_SR_INVALID_DB
,
1794 "SR (%s): Abort! no valid SR DataBase", __func__
);
1798 /* Get SR Node in hash table from Router ID */
1799 srn
= (struct sr_node
*)hash_get(OspfSR
.neighbors
,
1800 (void *)&(lsah
->adv_router
),
1801 (void *)sr_node_new
);
1802 /* Initialize TLV browsing */
1803 length
= lsa
->size
- OSPF_LSA_HEADER_SIZE
;
1804 for (tlvh
= TLV_HDR_TOP(lsah
); length
> 0 && tlvh
;
1805 tlvh
= TLV_HDR_NEXT(tlvh
)) {
1806 if (ntohs(tlvh
->type
) == EXT_TLV_LINK
) {
1807 /* Got Extended Link information */
1808 srp
= get_ext_prefix_sid(tlvh
, length
);
1809 /* Update SID if not null */
1811 srp
->instance
= ntohl(lsah
->id
.s_addr
);
1812 update_ext_prefix_sid(srn
, srp
);
1815 length
-= TLV_SIZE(tlvh
);
1819 /* Delete Segment Routing from Extended Prefix LSA */
1820 void ospf_sr_ext_prefix_lsa_delete(struct ospf_lsa
*lsa
)
1822 struct listnode
*node
;
1823 struct sr_prefix
*srp
;
1824 struct sr_node
*srn
;
1825 struct lsa_header
*lsah
= (struct lsa_header
*)lsa
->data
;
1826 uint32_t instance
= ntohl(lsah
->id
.s_addr
);
1828 osr_debug("SR (%s): Remove Extended Prefix LSA 7.0.0.%u from %pI4",
1829 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1833 if (OspfSR
.neighbors
== NULL
) {
1834 flog_err(EC_OSPF_SR_INVALID_DB
,
1835 "SR (%s): Abort! no valid SR DataBase", __func__
);
1839 /* Search SR Node in hash table from Router ID */
1840 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
,
1841 (void *)&(lsah
->adv_router
));
1844 * SR-Node may be NULL if it has been remove previously when
1845 * processing Router Information LSA deletion
1848 flog_err(EC_OSPF_SR_INVALID_DB
,
1849 "SR (%s): Stop! no entry in SRDB for SR Node %pI4",
1850 __func__
, &lsah
->adv_router
);
1854 /* Search for corresponding Segment Prefix */
1855 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
))
1856 if (srp
->instance
== instance
)
1859 /* Remove Prefix if found */
1860 if ((srp
!= NULL
) && (srp
->instance
== instance
)) {
1861 ospf_zebra_delete_prefix_sid(srp
);
1862 listnode_delete(srn
->ext_prefix
, srp
);
1863 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
1866 EC_OSPF_SR_INVALID_DB
,
1867 "SR (%s): Didn't found corresponding SR Prefix 7.0.0.%u for SR Node %pI4",
1868 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1874 * Update Prefix SID. Call by ospf_ext_pref_ism_change to
1875 * complete initial CLI command at startup.
1877 * @param ifp - Loopback interface
1878 * @param pref - Prefix address of this interface
1882 void ospf_sr_update_local_prefix(struct interface
*ifp
, struct prefix
*p
)
1884 struct listnode
*node
;
1885 struct sr_prefix
*srp
;
1888 if ((ifp
== NULL
) || (p
== NULL
))
1892 * Search if there is a Segment Prefix that correspond to this
1893 * interface or prefix, and update it if found
1895 for (ALL_LIST_ELEMENTS_RO(OspfSR
.self
->ext_prefix
, node
, srp
)) {
1896 if ((srp
->nhlfe
.ifindex
== ifp
->ifindex
)
1897 || ((IPV4_ADDR_SAME(&srp
->prefv4
.prefix
, &p
->u
.prefix4
))
1898 && (srp
->prefv4
.prefixlen
== p
->prefixlen
))) {
1900 /* Update Interface & Prefix info */
1901 srp
->nhlfe
.ifindex
= ifp
->ifindex
;
1902 IPV4_ADDR_COPY(&srp
->prefv4
.prefix
, &p
->u
.prefix4
);
1903 srp
->prefv4
.prefixlen
= p
->prefixlen
;
1904 srp
->prefv4
.family
= p
->family
;
1905 IPV4_ADDR_COPY(&srp
->nhlfe
.nexthop
, &p
->u
.prefix4
);
1907 /* OK. Let's Schedule Extended Prefix LSA */
1908 srp
->instance
= ospf_ext_schedule_prefix_index(
1909 ifp
, srp
->sid
, &srp
->prefv4
, srp
->flags
);
1912 " |- Update Node SID %pFX - %u for self SR Node",
1913 (struct prefix
*)&srp
->prefv4
, srp
->sid
);
1915 /* Install SID if NO-PHP is set and not EXPLICIT-NULL */
1916 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
)
1917 && !CHECK_FLAG(srp
->flags
,
1918 EXT_SUBTLV_PREFIX_SID_EFLG
)) {
1919 srp
->label_in
= index2label(srp
->sid
,
1921 srp
->nhlfe
.label_out
= MPLS_LABEL_IMPLICIT_NULL
;
1922 ospf_zebra_update_prefix_sid(srp
);
1929 * Following functions are used to update MPLS LFIB after a SPF run
1932 static void ospf_sr_nhlfe_update(struct hash_bucket
*bucket
, void *args
)
1935 struct sr_node
*srn
= (struct sr_node
*)bucket
->data
;
1936 struct listnode
*node
;
1937 struct sr_prefix
*srp
;
1941 osr_debug(" |- Update Prefix for SR Node %pI4", &srn
->adv_router
);
1943 /* Skip Self SR Node */
1944 if (srn
== OspfSR
.self
)
1947 /* Update Extended Prefix */
1948 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
1950 /* Keep track of valid route */
1951 old
= srp
->route
!= NULL
;
1953 /* Compute the new NHLFE */
1954 rc
= compute_prefix_nhlfe(srp
);
1956 /* Check computation result */
1958 /* Routes are not know, remove old NHLFE if any to avoid loop */
1961 ospf_zebra_delete_prefix_sid(srp
);
1963 /* Routes exist but are not ready, skip it */
1966 /* There is at least one route, update NHLFE */
1968 ospf_zebra_update_prefix_sid(srp
);
1976 void ospf_sr_update_task(struct ospf
*ospf
)
1979 struct timeval start_time
, stop_time
;
1981 /* Check ospf and SR status */
1982 if ((ospf
== NULL
) || (OspfSR
.status
!= SR_UP
))
1985 monotime(&start_time
);
1987 osr_debug("SR (%s): Start SPF update", __func__
);
1989 hash_iterate(OspfSR
.neighbors
, (void (*)(struct hash_bucket
*,
1990 void *))ospf_sr_nhlfe_update
,
1993 monotime(&stop_time
);
1995 osr_debug("SR (%s): SPF Processing Time(usecs): %lld", __func__
,
1996 (stop_time
.tv_sec
- start_time
.tv_sec
) * 1000000LL
1997 + (stop_time
.tv_usec
- start_time
.tv_usec
));
2001 * --------------------------------------
2002 * Following are vty command functions.
2003 * --------------------------------------
2007 * Segment Routing Router configuration
2009 * Must be centralize as it concerns both Extended Link/Prefix LSA
2010 * and Router Information LSA. Choose to call it from Extended Prefix
2011 * write_config() call back.
2013 * @param vty VTY output
2017 void ospf_sr_config_write_router(struct vty
*vty
)
2019 struct listnode
*node
;
2020 struct sr_prefix
*srp
;
2023 if (OspfSR
.status
== SR_UP
)
2024 vty_out(vty
, " segment-routing on\n");
2026 upper
= OspfSR
.srgb
.start
+ OspfSR
.srgb
.size
- 1;
2027 if ((OspfSR
.srgb
.start
!= DEFAULT_SRGB_LABEL
)
2028 || (OspfSR
.srgb
.size
!= DEFAULT_SRGB_SIZE
))
2029 vty_out(vty
, " segment-routing global-block %u %u",
2030 OspfSR
.srgb
.start
, upper
);
2032 if ((OspfSR
.srlb
.start
!= DEFAULT_SRLB_LABEL
) ||
2033 (OspfSR
.srlb
.end
!= DEFAULT_SRLB_END
)) {
2034 if ((OspfSR
.srgb
.start
== DEFAULT_SRGB_LABEL
) &&
2035 (OspfSR
.srgb
.size
== DEFAULT_SRGB_SIZE
))
2036 vty_out(vty
, " segment-routing global-block %u %u",
2037 OspfSR
.srgb
.start
, upper
);
2038 vty_out(vty
, " local-block %u %u\n", OspfSR
.srlb
.start
,
2043 if (OspfSR
.msd
!= 0)
2044 vty_out(vty
, " segment-routing node-msd %u\n", OspfSR
.msd
);
2046 if (OspfSR
.self
!= NULL
) {
2047 for (ALL_LIST_ELEMENTS_RO(OspfSR
.self
->ext_prefix
, node
, srp
)) {
2048 vty_out(vty
, " segment-routing prefix %pFX index %u",
2049 &srp
->prefv4
, srp
->sid
);
2050 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_EFLG
))
2051 vty_out(vty
, " explicit-null\n");
2052 else if (CHECK_FLAG(srp
->flags
,
2053 EXT_SUBTLV_PREFIX_SID_NPFLG
))
2054 vty_out(vty
, " no-php-flag\n");
2061 DEFUN(ospf_sr_enable
,
2063 "segment-routing on",
2065 "Enable Segment Routing\n")
2068 VTY_DECLVAR_INSTANCE_CONTEXT(ospf
, ospf
);
2070 if (OspfSR
.status
!= SR_OFF
)
2073 if (ospf
->vrf_id
!= VRF_DEFAULT
) {
2075 "Segment Routing is only supported in default VRF\n");
2076 return CMD_WARNING_CONFIG_FAILED
;
2079 osr_debug("SR: Segment Routing: OFF -> ON");
2081 /* Start Segment Routing */
2082 OspfSR
.status
= SR_ON
;
2083 ospf_sr_start(ospf
);
2088 DEFUN (no_ospf_sr_enable
,
2089 no_ospf_sr_enable_cmd
,
2090 "no segment-routing [on]",
2093 "Disable Segment Routing\n")
2096 if (OspfSR
.status
== SR_OFF
)
2099 osr_debug("SR: Segment Routing: ON -> OFF");
2101 /* Start by Disabling Extended Link & Prefix LSA */
2102 ospf_ext_update_sr(false);
2104 /* then, disable Router Information SR parameters */
2105 ospf_router_info_update_sr(false, OspfSR
.self
);
2107 /* Finally, stop Segment Routing */
2113 static int ospf_sr_enabled(struct vty
*vty
)
2115 if (OspfSR
.status
!= SR_OFF
)
2119 vty_out(vty
, "%% OSPF SR is not turned on\n");
2124 /* tell if two ranges [r1_lower, r1_upper] and [r2_lower,r2_upper] overlap */
2125 static bool ranges_overlap(uint32_t r1_lower
, uint32_t r1_upper
,
2126 uint32_t r2_lower
, uint32_t r2_upper
)
2128 return !((r1_upper
< r2_lower
) || (r1_lower
> r2_upper
));
2132 /* tell if a range is valid */
2133 static bool sr_range_is_valid(uint32_t lower
, uint32_t upper
, uint32_t min_size
)
2135 return (upper
>= lower
+ min_size
);
2139 * Update SRGB and/or SRLB using new CLI values.
2141 * @param gb_lower Lower bound of the SRGB
2142 * @param gb_upper Upper bound of the SRGB
2143 * @param lb_lower Lower bound of the SRLB
2144 * @param lb_upper Upper bound of the SRLB
2146 * @return 0 on success, -1 otherwise
2148 static int update_sr_blocks(uint32_t gb_lower
, uint32_t gb_upper
,
2149 uint32_t lb_lower
, uint32_t lb_upper
)
2152 /* Check if values have changed */
2153 bool gb_changed
, lb_changed
;
2154 uint32_t gb_size
= gb_upper
- gb_lower
+ 1;
2155 uint32_t lb_size
= lb_upper
- lb_lower
+ 1;
2158 (OspfSR
.srgb
.size
!= gb_size
|| OspfSR
.srgb
.start
!= gb_lower
);
2160 (OspfSR
.srlb
.end
!= lb_upper
|| OspfSR
.srlb
.start
!= lb_lower
);
2161 if (!gb_changed
&& !lb_changed
)
2164 /* Check if SR is correctly started i.e. Label Manager connected */
2165 if (OspfSR
.status
!= SR_UP
) {
2166 OspfSR
.srgb
.size
= gb_size
;
2167 OspfSR
.srgb
.start
= gb_lower
;
2168 OspfSR
.srlb
.end
= lb_upper
;
2169 OspfSR
.srlb
.start
= lb_lower
;
2173 /* Release old SRGB if it has changed and is active. */
2176 sr_global_block_delete();
2178 /* Set new SRGB values - but do not reserve yet (we need to
2179 * release the SRLB too) */
2180 OspfSR
.srgb
.size
= gb_size
;
2181 OspfSR
.srgb
.start
= gb_lower
;
2182 if (OspfSR
.self
!= NULL
) {
2183 OspfSR
.self
->srgb
.range_size
= gb_size
;
2184 OspfSR
.self
->srgb
.lower_bound
= gb_lower
;
2187 /* Release old SRLB if it has changed and reserve new block as needed.
2191 sr_local_block_delete();
2193 /* Set new SRLB values */
2194 if (sr_local_block_init(lb_lower
, lb_upper
) < 0) {
2198 if (OspfSR
.self
!= NULL
) {
2199 OspfSR
.self
->srlb
.lower_bound
= lb_lower
;
2200 OspfSR
.self
->srlb
.range_size
= lb_size
;
2205 * Try to reserve the new SRGB from the Label Manger. If the
2206 * allocation fails, disable SR until new blocks are successfully
2210 if (sr_global_block_init(OspfSR
.srgb
.start
, OspfSR
.srgb
.size
)
2217 /* Update Self SR-Node */
2218 if (OspfSR
.self
!= NULL
) {
2219 /* SRGB is reserved, set Router Information parameters */
2220 ospf_router_info_update_sr(true, OspfSR
.self
);
2222 /* and update NHLFE entries */
2224 hash_iterate(OspfSR
.neighbors
,
2225 (void (*)(struct hash_bucket
*,
2226 void *))update_in_nhlfe
,
2229 /* and update (LAN)-Adjacency SID */
2231 ospf_ext_link_srlb_update();
2237 DEFUN(sr_global_label_range
, sr_global_label_range_cmd
,
2238 "segment-routing global-block (16-1048575) (16-1048575) [local-block (16-1048575) (16-1048575)]",
2240 "Segment Routing Global Block label range\n"
2241 "Lower-bound range in decimal (16-1048575)\n"
2242 "Upper-bound range in decimal (16-1048575)\n"
2243 "Segment Routing Local Block label range\n"
2244 "Lower-bound range in decimal (16-1048575)\n"
2245 "Upper-bound range in decimal (16-1048575)\n")
2247 uint32_t lb_upper
, lb_lower
;
2248 uint32_t gb_upper
, gb_lower
;
2249 int idx_gb_low
= 2, idx_gb_up
= 3;
2250 int idx_lb_low
= 5, idx_lb_up
= 6;
2252 /* Get lower and upper bound for mandatory global-block */
2253 gb_lower
= strtoul(argv
[idx_gb_low
]->arg
, NULL
, 10);
2254 gb_upper
= strtoul(argv
[idx_gb_up
]->arg
, NULL
, 10);
2256 /* SRLB values are taken from vtysh if there, else use the known ones */
2257 lb_upper
= argc
> idx_lb_up
? strtoul(argv
[idx_lb_up
]->arg
, NULL
, 10)
2259 lb_lower
= argc
> idx_lb_low
? strtoul(argv
[idx_lb_low
]->arg
, NULL
, 10)
2260 : OspfSR
.srlb
.start
;
2262 /* check correctness of input SRGB */
2263 if (!sr_range_is_valid(gb_lower
, gb_upper
, MIN_SRGB_SIZE
)) {
2264 vty_out(vty
, "Invalid SRGB range\n");
2265 return CMD_WARNING_CONFIG_FAILED
;
2268 /* check correctness of SRLB */
2269 if (!sr_range_is_valid(lb_lower
, lb_upper
, MIN_SRLB_SIZE
)) {
2270 vty_out(vty
, "Invalid SRLB range\n");
2271 return CMD_WARNING_CONFIG_FAILED
;
2274 /* Validate SRGB against SRLB */
2275 if (ranges_overlap(gb_lower
, gb_upper
, lb_lower
, lb_upper
)) {
2277 "New SR Global Block (%u/%u) conflicts with Local Block (%u/%u)\n",
2278 gb_lower
, gb_upper
, lb_lower
, lb_upper
);
2279 return CMD_WARNING_CONFIG_FAILED
;
2282 if (update_sr_blocks(gb_lower
, gb_upper
, lb_lower
, lb_upper
) < 0)
2283 return CMD_WARNING_CONFIG_FAILED
;
2288 DEFUN(no_sr_global_label_range
, no_sr_global_label_range_cmd
,
2289 "no segment-routing global-block [(16-1048575) (16-1048575) local-block (16-1048575) (16-1048575)]",
2291 "Segment Routing Global Block label range\n"
2292 "Lower-bound range in decimal (16-1048575)\n"
2293 "Upper-bound range in decimal (16-1048575)\n"
2294 "Segment Routing Local Block label range\n"
2295 "Lower-bound range in decimal (16-1048575)\n"
2296 "Upper-bound range in decimal (16-1048575)\n")
2298 if (update_sr_blocks(DEFAULT_SRGB_LABEL
, DEFAULT_SRGB_END
,
2299 DEFAULT_SRLB_LABEL
, DEFAULT_SRLB_END
)
2301 return CMD_WARNING_CONFIG_FAILED
;
2308 "segment-routing node-msd (1-16)",
2310 "Maximum Stack Depth for this router\n"
2311 "Maximum number of label that could be stack (1-16)\n")
2316 if (!ospf_sr_enabled(vty
))
2317 return CMD_WARNING_CONFIG_FAILED
;
2320 argv_find(argv
, argc
, "(1-16)", &idx
);
2321 msd
= strtoul(argv
[idx
]->arg
, NULL
, 10);
2322 if (msd
< 1 || msd
> MPLS_MAX_LABELS
) {
2323 vty_out(vty
, "MSD must be comprise between 1 and %u\n",
2325 return CMD_WARNING_CONFIG_FAILED
;
2328 /* Check if value has changed */
2329 if (OspfSR
.msd
== msd
)
2332 /* Set this router MSD */
2334 if (OspfSR
.self
!= NULL
) {
2335 OspfSR
.self
->msd
= msd
;
2337 /* Set Router Information parameters if SR is UP */
2338 if (OspfSR
.status
== SR_UP
)
2339 ospf_router_info_update_sr(true, OspfSR
.self
);
2345 DEFUN (no_sr_node_msd
,
2347 "no segment-routing node-msd [(1-16)]",
2350 "Maximum Stack Depth for this router\n"
2351 "Maximum number of label that could be stack (1-16)\n")
2354 if (!ospf_sr_enabled(vty
))
2355 return CMD_WARNING_CONFIG_FAILED
;
2357 /* unset this router MSD */
2359 if (OspfSR
.self
!= NULL
) {
2360 OspfSR
.self
->msd
= 0;
2362 /* Set Router Information parameters if SR is UP */
2363 if (OspfSR
.status
== SR_UP
)
2364 ospf_router_info_update_sr(true, OspfSR
.self
);
2370 DEFUN (sr_prefix_sid
,
2372 "segment-routing prefix A.B.C.D/M index (0-65535) [no-php-flag|explicit-null]",
2375 "IPv4 Prefix as A.B.C.D/M\n"
2376 "SID index for this prefix in decimal (0-65535)\n"
2377 "Index value inside SRGB (lower_bound < index < upper_bound)\n"
2378 "Don't request Penultimate Hop Popping (PHP)\n"
2379 "Upstream neighbor must replace prefix-sid with explicit null label\n")
2382 struct prefix p
, pexist
;
2384 struct listnode
*node
;
2385 struct sr_prefix
*srp
, *exist
= NULL
;
2386 struct interface
*ifp
;
2387 bool no_php_flag
= false;
2388 bool exp_null
= false;
2389 bool index_in_use
= false;
2390 uint8_t desired_flags
= 0;
2392 if (!ospf_sr_enabled(vty
))
2393 return CMD_WARNING_CONFIG_FAILED
;
2395 /* Get network prefix */
2396 argv_find(argv
, argc
, "A.B.C.D/M", &idx
);
2397 if (!str2prefix(argv
[idx
]->arg
, &p
)) {
2398 vty_out(vty
, "Invalid prefix format %s\n", argv
[idx
]->arg
);
2399 return CMD_WARNING_CONFIG_FAILED
;
2402 /* Get & verify index value */
2403 argv_find(argv
, argc
, "(0-65535)", &idx
);
2404 index
= strtoul(argv
[idx
]->arg
, NULL
, 10);
2405 if (index
> OspfSR
.srgb
.size
- 1) {
2406 vty_out(vty
, "Index %u must be lower than range size %u\n",
2407 index
, OspfSR
.srgb
.size
);
2408 return CMD_WARNING_CONFIG_FAILED
;
2412 no_php_flag
= argv_find(argv
, argc
, "no-php-flag", &idx
);
2413 exp_null
= argv_find(argv
, argc
, "explicit-null", &idx
);
2415 desired_flags
|= no_php_flag
? EXT_SUBTLV_PREFIX_SID_NPFLG
: 0;
2416 desired_flags
|= exp_null
? EXT_SUBTLV_PREFIX_SID_NPFLG
: 0;
2417 desired_flags
|= exp_null
? EXT_SUBTLV_PREFIX_SID_EFLG
: 0;
2419 /* Search for an existing Prefix-SID */
2420 for (ALL_LIST_ELEMENTS_RO(OspfSR
.self
->ext_prefix
, node
, srp
)) {
2421 if (prefix_same((struct prefix
*)&srp
->prefv4
, &p
))
2423 if (srp
->sid
== index
) {
2424 index_in_use
= true;
2429 /* done if prefix segment already there with same index and flags */
2430 if (exist
&& exist
->sid
== index
&& exist
->flags
== desired_flags
)
2433 /* deny if index is already in use by a distinct prefix */
2434 if (!exist
&& index_in_use
) {
2435 vty_out(vty
, "Index %u is already used by %pFX\n", index
,
2437 return CMD_WARNING_CONFIG_FAILED
;
2440 /* First, remove old NHLFE if installed */
2441 if (exist
&& CHECK_FLAG(exist
->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
)
2442 && !CHECK_FLAG(exist
->flags
, EXT_SUBTLV_PREFIX_SID_EFLG
))
2443 ospf_zebra_delete_prefix_sid(exist
);
2445 /* Create new Extended Prefix to SRDB if not found */
2446 if (exist
== NULL
) {
2447 srp
= XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_prefix
));
2448 IPV4_ADDR_COPY(&srp
->prefv4
.prefix
, &p
.u
.prefix4
);
2449 srp
->prefv4
.prefixlen
= p
.prefixlen
;
2450 srp
->prefv4
.family
= p
.family
;
2452 srp
->type
= LOCAL_SID
;
2454 /* we work on the existing SR prefix */
2458 /* Reset labels to handle flag update */
2460 srp
->nhlfe
.label_out
= 0;
2462 srp
->flags
= desired_flags
;
2464 /* If NO PHP flag is present, compute NHLFE and set label */
2466 srp
->label_in
= index2label(srp
->sid
, OspfSR
.self
->srgb
);
2467 srp
->nhlfe
.label_out
= MPLS_LABEL_IMPLICIT_NULL
;
2470 osr_debug("SR (%s): Add new index %u to Prefix %pFX", __func__
, index
,
2471 (struct prefix
*)&srp
->prefv4
);
2473 /* Get Interface and check if it is a Loopback */
2474 ifp
= if_lookup_prefix(&p
, VRF_DEFAULT
);
2477 * Interface could be not yet available i.e. when this
2478 * command is in the configuration file, OSPF is not yet
2479 * ready. In this case, store the prefix SID for latter
2480 * update of this Extended Prefix
2483 listnode_add(OspfSR
.self
->ext_prefix
, srp
);
2485 "Interface for prefix %pFX not found. Deferred LSA flooding",
2490 if (!if_is_loopback(ifp
)) {
2491 vty_out(vty
, "interface %s is not a Loopback\n", ifp
->name
);
2492 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
2493 return CMD_WARNING_CONFIG_FAILED
;
2495 srp
->nhlfe
.ifindex
= ifp
->ifindex
;
2497 /* Add SR Prefix if new */
2499 listnode_add(OspfSR
.self
->ext_prefix
, srp
);
2501 /* Update Prefix SID if SR is UP */
2502 if (OspfSR
.status
== SR_UP
) {
2503 if (no_php_flag
&& !exp_null
)
2504 ospf_zebra_update_prefix_sid(srp
);
2508 /* Finally, update Extended Prefix LSA id SR is UP */
2509 srp
->instance
= ospf_ext_schedule_prefix_index(
2510 ifp
, srp
->sid
, &srp
->prefv4
, srp
->flags
);
2511 if (srp
->instance
== 0) {
2512 vty_out(vty
, "Unable to set index %u for prefix %pFX\n",
2520 DEFUN (no_sr_prefix_sid
,
2521 no_sr_prefix_sid_cmd
,
2522 "no segment-routing prefix A.B.C.D/M [index (0-65535)|no-php-flag|explicit-null]",
2526 "IPv4 Prefix as A.B.C.D/M\n"
2527 "SID index for this prefix in decimal (0-65535)\n"
2528 "Index value inside SRGB (lower_bound < index < upper_bound)\n"
2529 "Don't request Penultimate Hop Popping (PHP)\n"
2530 "Upstream neighbor must replace prefix-sid with explicit null label\n")
2534 struct listnode
*node
;
2535 struct sr_prefix
*srp
;
2536 struct interface
*ifp
;
2540 if (!ospf_sr_enabled(vty
))
2541 return CMD_WARNING_CONFIG_FAILED
;
2543 if (OspfSR
.status
!= SR_UP
)
2546 /* Get network prefix */
2547 argv_find(argv
, argc
, "A.B.C.D/M", &idx
);
2548 rc
= str2prefix(argv
[idx
]->arg
, &p
);
2550 vty_out(vty
, "Invalid prefix format %s\n", argv
[idx
]->arg
);
2551 return CMD_WARNING_CONFIG_FAILED
;
2554 /* check that the prefix is already set */
2555 for (ALL_LIST_ELEMENTS_RO(OspfSR
.self
->ext_prefix
, node
, srp
))
2556 if (IPV4_ADDR_SAME(&srp
->prefv4
.prefix
, &p
.u
.prefix4
)
2557 && (srp
->prefv4
.prefixlen
== p
.prefixlen
)) {
2563 vty_out(vty
, "Prefix %s is not found. Abort!\n",
2565 return CMD_WARNING_CONFIG_FAILED
;
2568 osr_debug("SR (%s): Remove Prefix %pFX with index %u", __func__
,
2569 (struct prefix
*)&srp
->prefv4
, srp
->sid
);
2572 ifp
= if_lookup_by_index(srp
->nhlfe
.ifindex
, VRF_DEFAULT
);
2574 vty_out(vty
, "interface for prefix %s not found.\n",
2576 /* silently remove from list */
2577 listnode_delete(OspfSR
.self
->ext_prefix
, srp
);
2578 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
2582 /* Update Extended Prefix LSA */
2583 if (!ospf_ext_schedule_prefix_index(ifp
, 0, NULL
, 0)) {
2584 vty_out(vty
, "No corresponding loopback interface. Abort!\n");
2588 /* Delete NHLFE if NO-PHP is set and EXPLICIT NULL not set */
2589 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
)
2590 && !CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_EFLG
))
2591 ospf_zebra_delete_prefix_sid(srp
);
2593 /* OK, all is clean, remove SRP from SRDB */
2594 listnode_delete(OspfSR
.self
->ext_prefix
, srp
);
2595 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
2601 static char *sr_op2str(char *buf
, size_t size
, mpls_label_t label_in
,
2602 mpls_label_t label_out
)
2607 switch (label_out
) {
2608 case MPLS_LABEL_IMPLICIT_NULL
:
2609 snprintf(buf
, size
, "Pop(%u)", label_in
);
2611 case MPLS_LABEL_IPV4_EXPLICIT_NULL
:
2612 if (label_in
== MPLS_LABEL_IPV4_EXPLICIT_NULL
)
2613 snprintf(buf
, size
, "no-op.");
2615 snprintf(buf
, size
, "Swap(%u, null)", label_in
);
2617 case MPLS_INVALID_LABEL
:
2618 snprintf(buf
, size
, "no-op.");
2621 snprintf(buf
, size
, "Swap(%u, %u)", label_in
, label_out
);
2627 static void show_sr_prefix(struct sbuf
*sbuf
, struct json_object
*json
,
2628 struct sr_prefix
*srp
)
2631 struct listnode
*node
;
2632 struct ospf_path
*path
;
2633 struct interface
*itf
;
2634 json_object
*json_route
= NULL
, *json_obj
;
2638 char buf
[PREFIX_STRLEN
];
2641 snprintfrr(pref
, 19, "%pFX", (struct prefix
*)&srp
->prefv4
);
2642 snprintf(sid
, 22, "SR Pfx (idx %u)", srp
->sid
);
2644 json_object_string_add(json
, "prefix", pref
);
2645 json_object_int_add(json
, "sid", srp
->sid
);
2646 json_object_int_add(json
, "inputLabel", srp
->label_in
);
2648 sbuf_push(sbuf
, 0, "%18s %21s ", pref
, sid
);
2651 /* Check if it is a Local Node SID */
2652 if (srp
->type
== LOCAL_SID
) {
2653 itf
= if_lookup_by_index(srp
->nhlfe
.ifindex
, VRF_DEFAULT
);
2656 json_route
= json_object_new_array();
2657 json_object_object_add(json
, "prefixRoute",
2660 json_obj
= json_object_new_object();
2661 json_object_int_add(json_obj
, "outputLabel",
2662 srp
->nhlfe
.label_out
);
2663 json_object_string_add(json_obj
, "interface",
2664 itf
? itf
->name
: "-");
2665 json_object_string_addf(json_obj
, "nexthop", "%pI4",
2666 &srp
->nhlfe
.nexthop
);
2667 json_object_array_add(json_route
, json_obj
);
2669 sbuf_push(sbuf
, 0, "%20s %9s %15s\n",
2670 sr_op2str(op
, 32, srp
->label_in
,
2671 srp
->nhlfe
.label_out
),
2672 itf
? itf
->name
: "-",
2673 inet_ntop(AF_INET
, &srp
->nhlfe
.nexthop
,
2679 /* Check if we have a valid path for this prefix */
2680 if (srp
->route
== NULL
) {
2682 sbuf_push(sbuf
, 0, "\n");
2687 /* Process list of OSPF paths */
2688 for (ALL_LIST_ELEMENTS_RO(srp
->route
->paths
, node
, path
)) {
2689 itf
= if_lookup_by_index(path
->ifindex
, VRF_DEFAULT
);
2692 json_route
= json_object_new_array();
2693 json_object_object_add(json
, "prefixRoute",
2696 json_obj
= json_object_new_object();
2697 json_object_int_add(json_obj
, "outputLabel",
2698 path
->srni
.label_out
);
2699 json_object_string_add(json_obj
, "interface",
2700 itf
? itf
->name
: "-");
2701 json_object_string_addf(json_obj
, "nexthop", "%pI4",
2703 json_object_array_add(json_route
, json_obj
);
2705 sbuf_push(sbuf
, indent
, "%20s %9s %15s\n",
2706 sr_op2str(op
, 32, srp
->label_in
,
2707 path
->srni
.label_out
),
2708 itf
? itf
->name
: "-",
2709 inet_ntop(AF_INET
, &path
->nexthop
, buf
,
2711 /* Offset to align information for ECMP */
2717 static void show_sr_node(struct vty
*vty
, struct json_object
*json
,
2718 struct sr_node
*srn
)
2721 struct listnode
*node
;
2722 struct sr_link
*srl
;
2723 struct sr_prefix
*srp
;
2724 struct interface
*itf
;
2729 char buf
[PREFIX_STRLEN
];
2731 json_object
*json_node
= NULL
, *json_algo
, *json_obj
;
2732 json_object
*json_prefix
= NULL
, *json_link
= NULL
;
2738 sbuf_init(&sbuf
, NULL
, 0);
2741 json_node
= json_object_new_object();
2742 json_object_string_addf(json_node
, "routerID", "%pI4",
2744 json_object_int_add(json_node
, "srgbSize",
2745 srn
->srgb
.range_size
);
2746 json_object_int_add(json_node
, "srgbLabel",
2747 srn
->srgb
.lower_bound
);
2748 json_object_int_add(json_node
, "srlbSize",
2749 srn
->srlb
.range_size
);
2750 json_object_int_add(json_node
, "srlbLabel",
2751 srn
->srlb
.lower_bound
);
2752 json_algo
= json_object_new_array();
2753 json_object_object_add(json_node
, "algorithms", json_algo
);
2754 for (int i
= 0; i
< ALGORITHM_COUNT
; i
++) {
2755 if (srn
->algo
[i
] == SR_ALGORITHM_UNSET
)
2757 json_obj
= json_object_new_object();
2760 snprintf(tmp
, sizeof(tmp
), "%u", i
);
2761 json_object_string_add(json_obj
, tmp
,
2762 srn
->algo
[i
] == SR_ALGORITHM_SPF
2765 json_object_array_add(json_algo
, json_obj
);
2768 json_object_int_add(json_node
, "nodeMsd", srn
->msd
);
2770 sbuf_push(&sbuf
, 0, "SR-Node: %pI4", &srn
->adv_router
);
2771 upper
= srn
->srgb
.lower_bound
+ srn
->srgb
.range_size
- 1;
2772 sbuf_push(&sbuf
, 0, "\tSRGB: [%u/%u]",
2773 srn
->srgb
.lower_bound
, upper
);
2774 upper
= srn
->srlb
.lower_bound
+ srn
->srlb
.range_size
- 1;
2775 sbuf_push(&sbuf
, 0, "\tSRLB: [%u/%u]",
2776 srn
->srlb
.lower_bound
, upper
);
2777 sbuf_push(&sbuf
, 0, "\tAlgo.(s): %s",
2778 srn
->algo
[0] == SR_ALGORITHM_SPF
? "SPF" : "S-SPF");
2779 for (int i
= 1; i
< ALGORITHM_COUNT
; i
++) {
2780 if (srn
->algo
[i
] == SR_ALGORITHM_UNSET
)
2782 sbuf_push(&sbuf
, 0, "/%s",
2783 srn
->algo
[i
] == SR_ALGORITHM_SPF
? "SPF"
2787 sbuf_push(&sbuf
, 0, "\tMSD: %u", srn
->msd
);
2792 "\n\n Prefix or Link Node or Adj. SID Label Operation Interface Nexthop\n");
2794 "------------------ --------------------- -------------------- --------- ---------------\n");
2796 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
2799 json_prefix
= json_object_new_array();
2800 json_object_object_add(json_node
,
2804 json_obj
= json_object_new_object();
2805 show_sr_prefix(NULL
, json_obj
, srp
);
2806 json_object_array_add(json_prefix
, json_obj
);
2808 show_sr_prefix(&sbuf
, NULL
, srp
);
2812 for (ALL_LIST_ELEMENTS_RO(srn
->ext_link
, node
, srl
)) {
2813 snprintfrr(pref
, 19, "%pI4/32", &srl
->itf_addr
);
2814 snprintf(sid
, 22, "SR Adj. (lbl %u)", srl
->sid
[0]);
2815 itf
= if_lookup_by_index(srl
->nhlfe
[0].ifindex
, VRF_DEFAULT
);
2818 json_link
= json_object_new_array();
2819 json_object_object_add(
2820 json_node
, "extendedLink", json_link
);
2823 json_obj
= json_object_new_object();
2824 json_object_string_add(json_obj
, "prefix", pref
);
2825 json_object_int_add(json_obj
, "sid", srl
->sid
[0]);
2826 json_object_int_add(json_obj
, "inputLabel",
2827 srl
->nhlfe
[0].label_in
);
2828 json_object_int_add(json_obj
, "outputLabel",
2829 srl
->nhlfe
[0].label_out
);
2830 json_object_string_add(json_obj
, "interface",
2831 itf
? itf
->name
: "-");
2832 json_object_string_addf(json_obj
, "nexthop", "%pI4",
2833 &srl
->nhlfe
[0].nexthop
);
2834 json_object_array_add(json_link
, json_obj
);
2836 json_obj
= json_object_new_object();
2837 snprintf(sid
, 22, "SR Adj. (lbl %u)", srl
->sid
[1]);
2838 json_object_string_add(json_obj
, "prefix", pref
);
2839 json_object_int_add(json_obj
, "sid", srl
->sid
[1]);
2840 json_object_int_add(json_obj
, "inputLabel",
2841 srl
->nhlfe
[1].label_in
);
2842 json_object_int_add(json_obj
, "outputLabel",
2843 srl
->nhlfe
[1].label_out
);
2844 json_object_string_add(json_obj
, "interface",
2845 itf
? itf
->name
: "-");
2846 json_object_string_addf(json_obj
, "nexthop", "%pI4",
2847 &srl
->nhlfe
[1].nexthop
);
2848 json_object_array_add(json_link
, json_obj
);
2850 sbuf_push(&sbuf
, 0, "%18s %21s %20s %9s %15s\n",
2852 sr_op2str(op
, 32, srl
->nhlfe
[0].label_in
,
2853 srl
->nhlfe
[0].label_out
),
2854 itf
? itf
->name
: "-",
2855 inet_ntop(AF_INET
, &srl
->nhlfe
[0].nexthop
,
2857 snprintf(sid
, 22, "SR Adj. (lbl %u)", srl
->sid
[1]);
2858 sbuf_push(&sbuf
, 0, "%18s %21s %20s %9s %15s\n",
2860 sr_op2str(op
, 32, srl
->nhlfe
[1].label_in
,
2861 srl
->nhlfe
[1].label_out
),
2862 itf
? itf
->name
: "-",
2863 inet_ntop(AF_INET
, &srl
->nhlfe
[1].nexthop
,
2868 json_object_array_add(json
, json_node
);
2870 vty_out(vty
, "%s\n", sbuf_buf(&sbuf
));
2875 static void show_vty_srdb(struct hash_bucket
*bucket
, void *args
)
2877 struct vty
*vty
= (struct vty
*)args
;
2878 struct sr_node
*srn
= (struct sr_node
*)bucket
->data
;
2880 show_sr_node(vty
, NULL
, srn
);
2883 static void show_json_srdb(struct hash_bucket
*bucket
, void *args
)
2885 struct json_object
*json
= (struct json_object
*)args
;
2886 struct sr_node
*srn
= (struct sr_node
*)bucket
->data
;
2888 show_sr_node(NULL
, json
, srn
);
2891 DEFUN (show_ip_opsf_srdb
,
2892 show_ip_ospf_srdb_cmd
,
2893 "show ip ospf database segment-routing [adv-router A.B.C.D|self-originate] [json]",
2897 "Database summary\n"
2898 "Show Segment Routing Data Base\n"
2899 "Advertising SR node\n"
2900 "Advertising SR node ID (as an IP address)\n"
2901 "Self-originated SR node\n"
2906 struct sr_node
*srn
;
2907 bool uj
= use_json(argc
, argv
);
2908 json_object
*json
= NULL
, *json_node_array
= NULL
;
2910 if (OspfSR
.status
== SR_OFF
) {
2911 vty_out(vty
, "Segment Routing is disabled on this router\n");
2916 json
= json_object_new_object();
2917 json_node_array
= json_object_new_array();
2918 json_object_string_addf(json
, "srdbID", "%pI4",
2919 &OspfSR
.self
->adv_router
);
2920 json_object_object_add(json
, "srNodes", json_node_array
);
2923 "\n\t\tOSPF Segment Routing database for ID %pI4\n\n",
2924 &OspfSR
.self
->adv_router
);
2927 if (argv_find(argv
, argc
, "self-originate", &idx
)) {
2929 show_sr_node(vty
, json_node_array
, srn
);
2931 vty_json(vty
, json
);
2935 if (argv_find(argv
, argc
, "A.B.C.D", &idx
)) {
2936 if (!inet_aton(argv
[idx
]->arg
, &rid
)) {
2937 vty_out(vty
, "Specified Router ID %s is invalid\n",
2939 return CMD_WARNING_CONFIG_FAILED
;
2941 /* Get the SR Node from the SRDB */
2942 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
,
2944 show_sr_node(vty
, json_node_array
, srn
);
2946 vty_json(vty
, json
);
2950 /* No parameters have been provided, Iterate through all the SRDB */
2952 hash_iterate(OspfSR
.neighbors
, (void (*)(struct hash_bucket
*,
2953 void *))show_json_srdb
,
2954 (void *)json_node_array
);
2955 vty_json(vty
, json
);
2957 hash_iterate(OspfSR
.neighbors
, (void (*)(struct hash_bucket
*,
2958 void *))show_vty_srdb
,
2964 /* Install new CLI commands */
2965 void ospf_sr_register_vty(void)
2967 install_element(VIEW_NODE
, &show_ip_ospf_srdb_cmd
);
2969 install_element(OSPF_NODE
, &ospf_sr_enable_cmd
);
2970 install_element(OSPF_NODE
, &no_ospf_sr_enable_cmd
);
2971 install_element(OSPF_NODE
, &sr_global_label_range_cmd
);
2972 install_element(OSPF_NODE
, &no_sr_global_label_range_cmd
);
2973 install_element(OSPF_NODE
, &sr_node_msd_cmd
);
2974 install_element(OSPF_NODE
, &no_sr_node_msd_cmd
);
2975 install_element(OSPF_NODE
, &sr_prefix_sid_cmd
);
2976 install_element(OSPF_NODE
, &no_sr_prefix_sid_cmd
);