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(struct ospf_sr_db
));
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
)) {
760 if (IPV4_ADDR_SAME(&nbr
->address
.u
.prefix4
,
762 || IPV4_ADDR_SAME(&nbr
->router_id
, &addr
)) {
763 route_unlock_node(rn
);
770 /* Get OSPF Path from address */
771 static struct ospf_route
*get_nexthop_by_addr(struct ospf
*top
,
772 struct prefix_ipv4 p
)
774 struct route_node
*rn
;
780 osr_debug(" |- Search Nexthop for prefix %pFX",
781 (struct prefix
*)&p
);
783 rn
= route_node_lookup(top
->new_table
, (struct prefix
*)&p
);
786 * Check if we found an OSPF route. May be NULL if SPF has not
787 * yet populate routing table for this prefix.
792 route_unlock_node(rn
);
796 /* Compute NHLFE entry for Extended Link */
797 static int compute_link_nhlfe(struct sr_link
*srl
)
799 struct ospf
*top
= ospf_lookup_by_vrf_id(VRF_DEFAULT
);
800 struct ospf_neighbor
*nh
;
803 osr_debug(" |- Compute NHLFE for link %pI4", &srl
->itf_addr
);
805 /* First determine the OSPF Neighbor */
806 nh
= get_neighbor_by_addr(top
, srl
->nhlfe
[0].nexthop
);
808 /* Neighbor could be not found when OSPF Adjacency just fire up
809 * because SPF don't yet populate routing table. This NHLFE will
810 * be fixed later when SR SPF schedule will be called.
815 osr_debug(" |- Found nexthop %pI4", &nh
->router_id
);
817 /* Set ifindex for this neighbor */
818 srl
->nhlfe
[0].ifindex
= nh
->oi
->ifp
->ifindex
;
819 srl
->nhlfe
[1].ifindex
= nh
->oi
->ifp
->ifindex
;
821 /* Update neighbor address for LAN_ADJ_SID */
822 if (srl
->type
== LAN_ADJ_SID
) {
823 IPV4_ADDR_COPY(&srl
->nhlfe
[0].nexthop
, &nh
->src
);
824 IPV4_ADDR_COPY(&srl
->nhlfe
[1].nexthop
, &nh
->src
);
827 /* Set Input & Output Label */
828 if (CHECK_FLAG(srl
->flags
[0], EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
829 srl
->nhlfe
[0].label_in
= srl
->sid
[0];
831 srl
->nhlfe
[0].label_in
=
832 index2label(srl
->sid
[0], srl
->srn
->srgb
);
833 if (CHECK_FLAG(srl
->flags
[1], EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
834 srl
->nhlfe
[1].label_in
= srl
->sid
[1];
836 srl
->nhlfe
[1].label_in
=
837 index2label(srl
->sid
[1], srl
->srn
->srgb
);
839 srl
->nhlfe
[0].label_out
= MPLS_LABEL_IMPLICIT_NULL
;
840 srl
->nhlfe
[1].label_out
= MPLS_LABEL_IMPLICIT_NULL
;
847 * Compute output label for the given Prefix-SID.
849 * @param srp Segment Routing Prefix
850 * @param srnext Segment Routing nexthop node
852 * @return MPLS label or MPLS_INVALID_LABEL in case of error
854 static mpls_label_t
sr_prefix_out_label(const struct sr_prefix
*srp
,
855 const struct sr_node
*srnext
)
857 /* Check if the nexthop SR Node is the last hop? */
858 if (srnext
== srp
->srn
) {
859 /* SR-Node doesn't request NO-PHP. Return Implicit NULL label */
860 if (!CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
))
861 return MPLS_LABEL_IMPLICIT_NULL
;
863 /* SR-Node requests Explicit NULL Label */
864 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_EFLG
))
865 return MPLS_LABEL_IPV4_EXPLICIT_NULL
;
869 /* Return SID value as MPLS label if it is an Absolute SID */
870 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_VFLG
871 | EXT_SUBTLV_PREFIX_SID_LFLG
)) {
873 * V/L SIDs have local significance, so only adjacent routers
874 * can use them (RFC8665 section #5)
876 if (srp
->srn
!= srnext
)
877 return MPLS_INVALID_LABEL
;
881 /* Return MPLS label as SRGB lower bound + SID index as per RFC 8665 */
882 return (index2label(srp
->sid
, srnext
->srgb
));
886 * Compute NHLFE entry for Extended Prefix
888 * @param srp - Segment Routing Prefix
890 * @return -1 if no route is found, 0 if there is no SR route ready
891 * and 1 if success or update
893 static int compute_prefix_nhlfe(struct sr_prefix
*srp
)
895 struct ospf
*top
= ospf_lookup_by_vrf_id(VRF_DEFAULT
);
896 struct ospf_path
*path
;
897 struct listnode
*node
;
898 struct sr_node
*srnext
;
901 osr_debug(" |- Compute NHLFE for prefix %pFX",
902 (struct prefix
*)&srp
->prefv4
);
905 /* First determine the nexthop */
906 srp
->route
= get_nexthop_by_addr(top
, srp
->prefv4
);
908 /* Nexthop could be not found when OSPF Adjacency just fire up
909 * because SPF don't yet populate routing table. This NHLFE will
910 * be fixed later when SR SPF schedule will be called.
912 if (srp
->route
== NULL
)
915 /* Compute Input Label with self SRGB */
916 srp
->label_in
= index2label(srp
->sid
, OspfSR
.self
->srgb
);
919 for (ALL_LIST_ELEMENTS_RO(srp
->route
->paths
, node
, path
)) {
921 osr_debug(" |- Process new route via %pI4 for this prefix",
925 * Get SR-Node for this nexthop. Could be not yet available
926 * as Extended Link / Prefix and Router Information are flooded
927 * after LSA Type 1 & 2 which populate the OSPF Route Table
929 srnext
= get_sr_node_by_nexthop(top
, path
->nexthop
);
933 /* And store this information for later update */
934 srnext
->neighbor
= OspfSR
.self
;
935 path
->srni
.nexthop
= srnext
;
938 * SR Node could be known, but SRGB could be not initialize
939 * This is due to the fact that Extended Link / Prefix could
940 * be received before corresponding Router Information LSA
942 if (srnext
== NULL
|| srnext
->srgb
.lower_bound
== 0
943 || srnext
->srgb
.range_size
== 0) {
945 " |- SR-Node %pI4 not ready. Stop process",
946 &srnext
->adv_router
);
947 path
->srni
.label_out
= MPLS_INVALID_LABEL
;
951 osr_debug(" |- Found SRGB %u/%u for next hop SR-Node %pI4",
952 srnext
->srgb
.range_size
, srnext
->srgb
.lower_bound
,
953 &srnext
->adv_router
);
955 /* Compute Output Label with Nexthop SR Node SRGB */
956 path
->srni
.label_out
= sr_prefix_out_label(srp
, srnext
);
958 osr_debug(" |- Computed new labels in: %u out: %u",
959 srp
->label_in
, path
->srni
.label_out
);
965 /* Add new NHLFE entry for Adjacency SID */
966 static inline void add_adj_sid(struct sr_nhlfe nhlfe
)
968 if (nhlfe
.label_in
!= 0)
969 ospf_zebra_send_adjacency_sid(ZEBRA_MPLS_LABELS_ADD
, nhlfe
);
972 /* Remove NHLFE entry for Adjacency SID */
973 static inline void del_adj_sid(struct sr_nhlfe nhlfe
)
975 if (nhlfe
.label_in
!= 0)
976 ospf_zebra_send_adjacency_sid(ZEBRA_MPLS_LABELS_DELETE
, nhlfe
);
979 /* Update NHLFE entry for Adjacency SID */
980 static inline void update_adj_sid(struct sr_nhlfe n1
, struct sr_nhlfe n2
)
987 * Functions to parse and get Extended Link / Prefix
991 /* Extended Link SubTLVs Getter */
992 static struct sr_link
*get_ext_link_sid(struct tlv_header
*tlvh
, size_t size
)
996 struct ext_tlv_link
*link
= (struct ext_tlv_link
*)tlvh
;
997 struct ext_subtlv_adj_sid
*adj_sid
;
998 struct ext_subtlv_lan_adj_sid
*lan_sid
;
999 struct ext_subtlv_rmt_itf_addr
*rmt_itf
;
1001 struct tlv_header
*sub_tlvh
;
1002 uint16_t length
= 0, sum
= 0, i
= 0;
1004 /* Check TLV size */
1005 if ((ntohs(tlvh
->length
) > size
)
1006 || ntohs(tlvh
->length
) < EXT_TLV_LINK_SIZE
) {
1007 zlog_warn("Wrong Extended Link TLV size. Abort!");
1011 srl
= XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_link
));
1013 /* Initialize TLV browsing */
1014 length
= ntohs(tlvh
->length
) - EXT_TLV_LINK_SIZE
;
1015 sub_tlvh
= (struct tlv_header
*)((char *)(tlvh
) + TLV_HDR_SIZE
1016 + EXT_TLV_LINK_SIZE
);
1017 for (; sum
< length
&& sub_tlvh
; sub_tlvh
= TLV_HDR_NEXT(sub_tlvh
)) {
1018 switch (ntohs(sub_tlvh
->type
)) {
1019 case EXT_SUBTLV_ADJ_SID
:
1020 adj_sid
= (struct ext_subtlv_adj_sid
*)sub_tlvh
;
1021 srl
->type
= ADJ_SID
;
1022 i
= CHECK_FLAG(adj_sid
->flags
,
1023 EXT_SUBTLV_LINK_ADJ_SID_BFLG
)
1026 srl
->flags
[i
] = adj_sid
->flags
;
1027 if (CHECK_FLAG(adj_sid
->flags
,
1028 EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
1029 srl
->sid
[i
] = GET_LABEL(ntohl(adj_sid
->value
));
1031 srl
->sid
[i
] = ntohl(adj_sid
->value
);
1032 IPV4_ADDR_COPY(&srl
->nhlfe
[i
].nexthop
, &link
->link_id
);
1034 case EXT_SUBTLV_LAN_ADJ_SID
:
1035 lan_sid
= (struct ext_subtlv_lan_adj_sid
*)sub_tlvh
;
1036 srl
->type
= LAN_ADJ_SID
;
1037 i
= CHECK_FLAG(lan_sid
->flags
,
1038 EXT_SUBTLV_LINK_ADJ_SID_BFLG
)
1041 srl
->flags
[i
] = lan_sid
->flags
;
1042 if (CHECK_FLAG(lan_sid
->flags
,
1043 EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
1044 srl
->sid
[i
] = GET_LABEL(ntohl(lan_sid
->value
));
1046 srl
->sid
[i
] = ntohl(lan_sid
->value
);
1047 IPV4_ADDR_COPY(&srl
->nhlfe
[i
].nexthop
,
1048 &lan_sid
->neighbor_id
);
1050 case EXT_SUBTLV_RMT_ITF_ADDR
:
1051 rmt_itf
= (struct ext_subtlv_rmt_itf_addr
*)sub_tlvh
;
1052 IPV4_ADDR_COPY(&srl
->nhlfe
[0].nexthop
, &rmt_itf
->value
);
1053 IPV4_ADDR_COPY(&srl
->nhlfe
[1].nexthop
, &rmt_itf
->value
);
1058 sum
+= TLV_SIZE(sub_tlvh
);
1061 IPV4_ADDR_COPY(&srl
->itf_addr
, &link
->link_data
);
1063 osr_debug(" |- Found primary %u and backup %u Adj/Lan Sid for %pI4",
1064 srl
->sid
[0], srl
->sid
[1], &srl
->itf_addr
);
1069 /* Extended Prefix SubTLVs Getter */
1070 static struct sr_prefix
*get_ext_prefix_sid(struct tlv_header
*tlvh
,
1074 struct sr_prefix
*srp
;
1075 struct ext_tlv_prefix
*pref
= (struct ext_tlv_prefix
*)tlvh
;
1076 struct ext_subtlv_prefix_sid
*psid
;
1078 struct tlv_header
*sub_tlvh
;
1079 uint16_t length
= 0, sum
= 0;
1081 /* Check TLV size */
1082 if ((ntohs(tlvh
->length
) > size
)
1083 || ntohs(tlvh
->length
) < EXT_TLV_PREFIX_SIZE
) {
1084 zlog_warn("Wrong Extended Link TLV size. Abort!");
1088 srp
= XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_prefix
));
1090 /* Initialize TLV browsing */
1091 length
= ntohs(tlvh
->length
) - EXT_TLV_PREFIX_SIZE
;
1092 sub_tlvh
= (struct tlv_header
*)((char *)(tlvh
) + TLV_HDR_SIZE
1093 + EXT_TLV_PREFIX_SIZE
);
1094 for (; sum
< length
&& sub_tlvh
; sub_tlvh
= TLV_HDR_NEXT(sub_tlvh
)) {
1095 switch (ntohs(sub_tlvh
->type
)) {
1096 case EXT_SUBTLV_PREFIX_SID
:
1097 psid
= (struct ext_subtlv_prefix_sid
*)sub_tlvh
;
1098 if (psid
->algorithm
!= SR_ALGORITHM_SPF
) {
1099 flog_err(EC_OSPF_INVALID_ALGORITHM
,
1100 "SR (%s): Unsupported Algorithm",
1102 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
1105 srp
->type
= PREF_SID
;
1106 srp
->flags
= psid
->flags
;
1107 if (CHECK_FLAG(psid
->flags
, EXT_SUBTLV_PREFIX_SID_VFLG
))
1108 srp
->sid
= GET_LABEL(ntohl(psid
->value
));
1110 srp
->sid
= ntohl(psid
->value
);
1111 IPV4_ADDR_COPY(&srp
->prefv4
.prefix
, &pref
->address
);
1112 srp
->prefv4
.prefixlen
= pref
->pref_length
;
1113 srp
->prefv4
.family
= AF_INET
;
1114 apply_mask_ipv4(&srp
->prefv4
);
1119 sum
+= TLV_SIZE(sub_tlvh
);
1122 osr_debug(" |- Found SID %u for prefix %pFX", srp
->sid
,
1123 (struct prefix
*)&srp
->prefv4
);
1129 * Functions to manipulate Segment Routing Link & Prefix structures
1132 /* Compare two Segment Link: return 0 if equal, 1 otherwise */
1133 static inline int sr_link_cmp(struct sr_link
*srl1
, struct sr_link
*srl2
)
1135 if ((srl1
->sid
[0] == srl2
->sid
[0]) && (srl1
->sid
[1] == srl2
->sid
[1])
1136 && (srl1
->type
== srl2
->type
) && (srl1
->flags
[0] == srl2
->flags
[0])
1137 && (srl1
->flags
[1] == srl2
->flags
[1]))
1143 /* Compare two Segment Prefix: return 0 if equal, 1 otherwise */
1144 static inline int sr_prefix_cmp(struct sr_prefix
*srp1
, struct sr_prefix
*srp2
)
1146 if ((srp1
->sid
== srp2
->sid
) && (srp1
->flags
== srp2
->flags
))
1152 /* Update Segment Link of given Segment Routing Node */
1153 static void update_ext_link_sid(struct sr_node
*srn
, struct sr_link
*srl
,
1156 struct listnode
*node
;
1162 if ((srn
== NULL
) || (srl
== NULL
))
1165 osr_debug(" |- Process Extended Link Adj/Lan-SID");
1167 /* Detect if Adj/Lan_Adj SID must be configured */
1168 if (!CHECK_FLAG(lsa_flags
, OSPF_LSA_SELF
)
1169 && (CHECK_FLAG(srl
->flags
[0], EXT_SUBTLV_LINK_ADJ_SID_LFLG
)
1170 || CHECK_FLAG(srl
->flags
[1], EXT_SUBTLV_LINK_ADJ_SID_LFLG
)))
1173 /* Search for existing Segment Link */
1174 for (ALL_LIST_ELEMENTS_RO(srn
->ext_link
, node
, lk
))
1175 if (lk
->instance
== srl
->instance
) {
1180 osr_debug(" |- %s SR Link 8.0.0.%u for SR node %pI4",
1181 found
? "Update" : "Add", GET_OPAQUE_ID(srl
->instance
),
1184 /* if not found, add new Segment Link and install NHLFE */
1186 /* Complete SR-Link and add it to SR-Node list */
1188 IPV4_ADDR_COPY(&srl
->adv_router
, &srn
->adv_router
);
1189 listnode_add(srn
->ext_link
, srl
);
1190 /* Try to set MPLS table */
1191 if (config
&& compute_link_nhlfe(srl
)) {
1192 add_adj_sid(srl
->nhlfe
[0]);
1193 add_adj_sid(srl
->nhlfe
[1]);
1196 /* Update SR-Link if they are different */
1197 if (sr_link_cmp(lk
, srl
)) {
1198 /* Try to set MPLS table */
1200 if (compute_link_nhlfe(srl
)) {
1201 update_adj_sid(lk
->nhlfe
[0],
1203 update_adj_sid(lk
->nhlfe
[1],
1206 del_adj_sid(lk
->nhlfe
[0]);
1207 del_adj_sid(lk
->nhlfe
[1]);
1210 /* Replace SR-Link in SR-Node Adjacency List */
1211 listnode_delete(srn
->ext_link
, lk
);
1212 XFREE(MTYPE_OSPF_SR_PARAMS
, lk
);
1214 IPV4_ADDR_COPY(&srl
->adv_router
, &srn
->adv_router
);
1215 listnode_add(srn
->ext_link
, srl
);
1218 * This is just an LSA refresh.
1219 * Stop processing and free SR Link
1221 XFREE(MTYPE_OSPF_SR_PARAMS
, srl
);
1226 /* Update Segment Prefix of given Segment Routing Node */
1227 static void update_ext_prefix_sid(struct sr_node
*srn
, struct sr_prefix
*srp
)
1230 struct listnode
*node
;
1231 struct sr_prefix
*pref
;
1235 if (srn
== NULL
|| srp
== NULL
)
1238 osr_debug(" |- Process Extended Prefix SID %u", srp
->sid
);
1240 /* Process only Global Prefix SID */
1241 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_LFLG
))
1244 /* Search for existing Segment Prefix */
1245 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, pref
))
1246 if (pref
->instance
== srp
->instance
1247 && prefix_same((struct prefix
*)&srp
->prefv4
,
1253 osr_debug(" |- %s SR LSA ID 7.0.0.%u for SR node %pI4",
1254 found
? "Update" : "Add", GET_OPAQUE_ID(srp
->instance
),
1257 /* Complete SR-Prefix */
1259 IPV4_ADDR_COPY(&srp
->adv_router
, &srn
->adv_router
);
1261 /* if not found, add new Segment Prefix and install NHLFE */
1263 /* Add it to SR-Node list ... */
1264 listnode_add(srn
->ext_prefix
, srp
);
1265 /* ... and try to set MPLS table */
1266 if (compute_prefix_nhlfe(srp
) == 1)
1267 ospf_zebra_update_prefix_sid(srp
);
1270 * An old SR prefix exist. Check if something changes or if it
1271 * is just a refresh.
1273 if (sr_prefix_cmp(pref
, srp
)) {
1274 if (compute_prefix_nhlfe(srp
) == 1) {
1275 ospf_zebra_delete_prefix_sid(pref
);
1276 /* Replace Segment Prefix */
1277 listnode_delete(srn
->ext_prefix
, pref
);
1278 XFREE(MTYPE_OSPF_SR_PARAMS
, pref
);
1279 listnode_add(srn
->ext_prefix
, srp
);
1280 ospf_zebra_update_prefix_sid(srp
);
1282 /* New NHLFE was not found.
1283 * Just free the SR Prefix
1285 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
1288 /* This is just an LSA refresh.
1289 * Stop processing and free SR Prefix
1291 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
1297 * When change the FRR Self SRGB, update the NHLFE Input Label
1298 * for all Extended Prefix with SID index through hash_iterate()
1300 static void update_in_nhlfe(struct hash_bucket
*bucket
, void *args
)
1302 struct listnode
*node
;
1303 struct sr_node
*srn
= (struct sr_node
*)bucket
->data
;
1304 struct sr_prefix
*srp
;
1306 /* Process Every Extended Prefix for this SR-Node */
1307 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
1308 /* Process Self SRN only if NO-PHP is requested */
1309 if ((srn
== OspfSR
.self
)
1310 && !CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
))
1313 /* Process only SID Index */
1314 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_VFLG
))
1317 /* First, remove old MPLS table entries ... */
1318 ospf_zebra_delete_prefix_sid(srp
);
1319 /* ... then compute new input label ... */
1320 srp
->label_in
= index2label(srp
->sid
, OspfSR
.self
->srgb
);
1321 /* ... and install new MPLS LFIB */
1322 ospf_zebra_update_prefix_sid(srp
);
1327 * When SRGB has changed, update NHLFE Output Label for all Extended Prefix
1328 * with SID index which use the given SR-Node as nexthop through hash_iterate()
1330 static void update_out_nhlfe(struct hash_bucket
*bucket
, void *args
)
1332 struct listnode
*node
, *pnode
;
1333 struct sr_node
*srn
= (struct sr_node
*)bucket
->data
;
1334 struct sr_node
*srnext
= (struct sr_node
*)args
;
1335 struct sr_prefix
*srp
;
1336 struct ospf_path
*path
;
1338 /* Skip Self SR-Node */
1339 if (srn
== OspfSR
.self
)
1342 osr_debug("SR (%s): Update Out NHLFE for neighbor SR-Node %pI4",
1343 __func__
, &srn
->adv_router
);
1345 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
1346 /* Skip Prefix that has not yet a valid route */
1347 if (srp
->route
== NULL
)
1350 for (ALL_LIST_ELEMENTS_RO(srp
->route
->paths
, pnode
, path
)) {
1351 /* Skip path that has not next SR-Node as nexthop */
1352 if (path
->srni
.nexthop
!= srnext
)
1355 /* Compute new Output Label */
1356 path
->srni
.label_out
= sr_prefix_out_label(srp
, srnext
);
1359 /* Finally update MPLS table */
1360 ospf_zebra_update_prefix_sid(srp
);
1365 * Following functions are call when new Segment Routing LSA are received
1366 * - Router Information: ospf_sr_ri_lsa_update() & ospf_sr_ri_lsa_delete()
1367 * - Extended Link: ospf_sr_ext_link_update() & ospf_sr_ext_link_delete()
1368 * - Extended Prefix: ospf_ext_prefix_update() & ospf_sr_ext_prefix_delete()
1371 /* Update Segment Routing from Router Information LSA */
1372 void ospf_sr_ri_lsa_update(struct ospf_lsa
*lsa
)
1374 struct sr_node
*srn
;
1375 struct tlv_header
*tlvh
;
1376 struct lsa_header
*lsah
= lsa
->data
;
1377 struct ri_sr_tlv_sid_label_range
*ri_srgb
= NULL
;
1378 struct ri_sr_tlv_sid_label_range
*ri_srlb
= NULL
;
1379 struct ri_sr_tlv_sr_algorithm
*algo
= NULL
;
1380 struct sr_block srgb
;
1381 uint16_t length
= 0, sum
= 0;
1384 osr_debug("SR (%s): Process Router Information LSA 4.0.0.%u from %pI4",
1385 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1389 if (IS_LSA_SELF(lsa
))
1392 if (OspfSR
.neighbors
== NULL
) {
1393 flog_err(EC_OSPF_SR_INVALID_DB
,
1394 "SR (%s): Abort! no valid SR DataBase", __func__
);
1398 /* Search SR Node in hash table from Router ID */
1399 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
,
1403 /* Collect Router Information Sub TLVs */
1404 /* Initialize TLV browsing */
1405 length
= lsa
->size
- OSPF_LSA_HEADER_SIZE
;
1406 srgb
.range_size
= 0;
1407 srgb
.lower_bound
= 0;
1409 for (tlvh
= TLV_HDR_TOP(lsah
); (sum
< length
) && (tlvh
!= NULL
);
1410 tlvh
= TLV_HDR_NEXT(tlvh
)) {
1411 switch (ntohs(tlvh
->type
)) {
1412 case RI_SR_TLV_SR_ALGORITHM
:
1413 algo
= (struct ri_sr_tlv_sr_algorithm
*)tlvh
;
1415 case RI_SR_TLV_SRGB_LABEL_RANGE
:
1416 ri_srgb
= (struct ri_sr_tlv_sid_label_range
*)tlvh
;
1418 case RI_SR_TLV_SRLB_LABEL_RANGE
:
1419 ri_srlb
= (struct ri_sr_tlv_sid_label_range
*)tlvh
;
1421 case RI_SR_TLV_NODE_MSD
:
1422 msd
= ((struct ri_sr_tlv_node_msd
*)(tlvh
))->value
;
1427 sum
+= TLV_SIZE(tlvh
);
1430 /* Check if Segment Routing Capabilities has been found */
1431 if (ri_srgb
== NULL
) {
1432 /* Skip Router Information without SR capabilities
1433 * advertise by a non SR Node */
1437 /* Remove SR Node that advertise Router Information
1438 * without SR capabilities. This could correspond to a
1439 * Node stopping Segment Routing */
1440 hash_release(OspfSR
.neighbors
, &(srn
->adv_router
));
1446 /* Check that RI LSA belongs to the correct SR Node */
1447 if ((srn
!= NULL
) && (srn
->instance
!= 0)
1448 && (srn
->instance
!= ntohl(lsah
->id
.s_addr
))) {
1449 flog_err(EC_OSPF_SR_INVALID_LSA_ID
,
1450 "SR (%s): Abort! Wrong LSA ID 4.0.0.%u for SR node %pI4/%u",
1451 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1452 &lsah
->adv_router
, srn
->instance
);
1456 /* OK. All things look good. Get SRGB */
1457 srgb
.range_size
= GET_RANGE_SIZE(ntohl(ri_srgb
->size
));
1458 srgb
.lower_bound
= GET_LABEL(ntohl(ri_srgb
->lower
.value
));
1460 /* Check if it is a new SR Node or not */
1462 /* Get a new SR Node in hash table from Router ID */
1463 srn
= (struct sr_node
*)hash_get(OspfSR
.neighbors
,
1465 (void *)sr_node_new
);
1469 EC_OSPF_SR_NODE_CREATE
,
1470 "SR (%s): Abort! can't create SR node in hash table",
1475 srn
->instance
= ntohl(lsah
->id
.s_addr
);
1477 srn
->srgb
.range_size
= srgb
.range_size
;
1478 srn
->srgb
.lower_bound
= srgb
.lower_bound
;
1481 /* Update Algorithm, SRLB and MSD if present */
1484 for (i
= 0; i
< ntohs(algo
->header
.length
); i
++)
1485 srn
->algo
[i
] = algo
->value
[0];
1486 for (; i
< ALGORITHM_COUNT
; i
++)
1487 srn
->algo
[i
] = SR_ALGORITHM_UNSET
;
1489 srn
->algo
[0] = SR_ALGORITHM_SPF
;
1492 if (ri_srlb
!= NULL
) {
1493 srn
->srlb
.range_size
= GET_RANGE_SIZE(ntohl(ri_srlb
->size
));
1494 srn
->srlb
.lower_bound
= GET_LABEL(ntohl(ri_srlb
->lower
.value
));
1497 /* Check if SRGB has changed */
1498 if ((srn
->srgb
.range_size
== srgb
.range_size
)
1499 && (srn
->srgb
.lower_bound
== srgb
.lower_bound
))
1503 srn
->srgb
.range_size
= srgb
.range_size
;
1504 srn
->srgb
.lower_bound
= srgb
.lower_bound
;
1506 osr_debug(" |- Update SR-Node[%pI4], SRGB[%u/%u], SRLB[%u/%u], Algo[%u], MSD[%u]",
1507 &srn
->adv_router
, srn
->srgb
.lower_bound
, srn
->srgb
.range_size
,
1508 srn
->srlb
.lower_bound
, srn
->srlb
.range_size
, srn
->algo
[0],
1511 /* ... and NHLFE if it is a neighbor SR node */
1512 if (srn
->neighbor
== OspfSR
.self
)
1513 hash_iterate(OspfSR
.neighbors
, update_out_nhlfe
, srn
);
1517 * Delete SR Node entry in hash table information corresponding to an expired
1518 * Router Information LSA
1520 void ospf_sr_ri_lsa_delete(struct ospf_lsa
*lsa
)
1522 struct sr_node
*srn
;
1523 struct lsa_header
*lsah
= lsa
->data
;
1525 osr_debug("SR (%s): Remove SR node %pI4 from lsa_id 4.0.0.%u", __func__
,
1526 &lsah
->adv_router
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)));
1529 if (OspfSR
.neighbors
== NULL
) {
1530 flog_err(EC_OSPF_SR_INVALID_DB
,
1531 "SR (%s): Abort! no valid SR Data Base", __func__
);
1535 /* Release Router ID entry in SRDB hash table */
1536 srn
= hash_release(OspfSR
.neighbors
, &(lsah
->adv_router
));
1540 flog_err(EC_OSPF_SR_NODE_CREATE
,
1541 "SR (%s): Abort! no entry in SRDB for SR Node %pI4",
1542 __func__
, &lsah
->adv_router
);
1546 if ((srn
->instance
!= 0) && (srn
->instance
!= ntohl(lsah
->id
.s_addr
))) {
1548 EC_OSPF_SR_INVALID_LSA_ID
,
1549 "SR (%s): Abort! Wrong LSA ID 4.0.0.%u for SR node %pI4",
1550 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1555 /* Remove SR node */
1559 /* Update Segment Routing from Extended Link LSA */
1560 void ospf_sr_ext_link_lsa_update(struct ospf_lsa
*lsa
)
1562 struct sr_node
*srn
;
1563 struct tlv_header
*tlvh
;
1564 struct lsa_header
*lsah
= lsa
->data
;
1565 struct sr_link
*srl
;
1569 osr_debug("SR (%s): Process Extended Link LSA 8.0.0.%u from %pI4",
1570 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1574 if (OspfSR
.neighbors
== NULL
) {
1575 flog_err(EC_OSPF_SR_INVALID_DB
,
1576 "SR (%s): Abort! no valid SR DataBase", __func__
);
1580 /* Get SR Node in hash table from Router ID */
1581 srn
= (struct sr_node
*)hash_get(OspfSR
.neighbors
,
1582 (void *)&(lsah
->adv_router
),
1583 (void *)sr_node_new
);
1587 flog_err(EC_OSPF_SR_NODE_CREATE
,
1588 "SR (%s): Abort! can't create SR node in hash table",
1593 /* Initialize TLV browsing */
1594 length
= lsa
->size
- OSPF_LSA_HEADER_SIZE
;
1595 for (tlvh
= TLV_HDR_TOP(lsah
); length
> 0 && tlvh
;
1596 tlvh
= TLV_HDR_NEXT(tlvh
)) {
1597 if (ntohs(tlvh
->type
) == EXT_TLV_LINK
) {
1598 /* Got Extended Link information */
1599 srl
= get_ext_link_sid(tlvh
, length
);
1600 /* Update SID if not null */
1602 srl
->instance
= ntohl(lsah
->id
.s_addr
);
1603 update_ext_link_sid(srn
, srl
, lsa
->flags
);
1606 length
-= TLV_SIZE(tlvh
);
1610 /* Delete Segment Routing from Extended Link LSA */
1611 void ospf_sr_ext_link_lsa_delete(struct ospf_lsa
*lsa
)
1613 struct listnode
*node
;
1614 struct sr_link
*srl
;
1615 struct sr_node
*srn
;
1616 struct lsa_header
*lsah
= lsa
->data
;
1617 uint32_t instance
= ntohl(lsah
->id
.s_addr
);
1619 osr_debug("SR (%s): Remove Extended Link LSA 8.0.0.%u from %pI4",
1620 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1624 if (OspfSR
.neighbors
== NULL
) {
1625 flog_err(EC_OSPF_SR_INVALID_DB
,
1626 "SR (%s): Abort! no valid SR DataBase", __func__
);
1630 /* Search SR Node in hash table from Router ID */
1631 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
,
1632 (void *)&(lsah
->adv_router
));
1635 * SR-Node may be NULL if it has been remove previously when
1636 * processing Router Information LSA deletion
1639 flog_err(EC_OSPF_SR_INVALID_DB
,
1640 "SR (%s): Stop! no entry in SRDB for SR Node %pI4",
1641 __func__
, &lsah
->adv_router
);
1645 /* Search for corresponding Segment Link */
1646 for (ALL_LIST_ELEMENTS_RO(srn
->ext_link
, node
, srl
))
1647 if (srl
->instance
== instance
)
1650 /* Remove Segment Link if found. Note that for Neighbors, only Global
1651 * Adj/Lan-Adj SID are stored in the SR-DB */
1652 if ((srl
!= NULL
) && (srl
->instance
== instance
)) {
1653 del_adj_sid(srl
->nhlfe
[0]);
1654 del_adj_sid(srl
->nhlfe
[1]);
1655 listnode_delete(srn
->ext_link
, srl
);
1656 XFREE(MTYPE_OSPF_SR_PARAMS
, srl
);
1660 /* Add (LAN)Adjacency-SID from Extended Link Information */
1661 void ospf_sr_ext_itf_add(struct ext_itf
*exti
)
1663 struct sr_node
*srn
= OspfSR
.self
;
1664 struct sr_link
*srl
;
1666 osr_debug("SR (%s): Add Extended Link LSA 8.0.0.%u from self", __func__
,
1673 /* Initialize new Segment Routing Link */
1674 srl
= XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_link
));
1676 srl
->adv_router
= srn
->adv_router
;
1677 srl
->itf_addr
= exti
->link
.link_data
;
1679 SET_OPAQUE_LSID(OPAQUE_TYPE_EXTENDED_LINK_LSA
, exti
->instance
);
1680 srl
->remote_id
= exti
->link
.link_id
;
1681 switch (exti
->stype
) {
1683 srl
->type
= ADJ_SID
;
1684 /* Primary information */
1685 srl
->flags
[0] = exti
->adj_sid
[0].flags
;
1686 if (CHECK_FLAG(exti
->adj_sid
[0].flags
,
1687 EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
1688 srl
->sid
[0] = GET_LABEL(ntohl(exti
->adj_sid
[0].value
));
1690 srl
->sid
[0] = ntohl(exti
->adj_sid
[0].value
);
1691 if (exti
->rmt_itf_addr
.header
.type
== 0)
1692 srl
->nhlfe
[0].nexthop
= exti
->link
.link_id
;
1694 srl
->nhlfe
[0].nexthop
= exti
->rmt_itf_addr
.value
;
1695 /* Backup Information if set */
1696 if (exti
->adj_sid
[1].header
.type
== 0)
1698 srl
->flags
[1] = exti
->adj_sid
[1].flags
;
1699 if (CHECK_FLAG(exti
->adj_sid
[1].flags
,
1700 EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
1701 srl
->sid
[1] = GET_LABEL(ntohl(exti
->adj_sid
[1].value
));
1703 srl
->sid
[1] = ntohl(exti
->adj_sid
[1].value
);
1704 if (exti
->rmt_itf_addr
.header
.type
== 0)
1705 srl
->nhlfe
[1].nexthop
= exti
->link
.link_id
;
1707 srl
->nhlfe
[1].nexthop
= exti
->rmt_itf_addr
.value
;
1710 srl
->type
= LAN_ADJ_SID
;
1711 /* Primary information */
1712 srl
->flags
[0] = exti
->lan_sid
[0].flags
;
1713 if (CHECK_FLAG(exti
->lan_sid
[0].flags
,
1714 EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
1715 srl
->sid
[0] = GET_LABEL(ntohl(exti
->lan_sid
[0].value
));
1717 srl
->sid
[0] = ntohl(exti
->lan_sid
[0].value
);
1718 if (exti
->rmt_itf_addr
.header
.type
== 0)
1719 srl
->nhlfe
[0].nexthop
= exti
->lan_sid
[0].neighbor_id
;
1721 srl
->nhlfe
[0].nexthop
= exti
->rmt_itf_addr
.value
;
1722 /* Backup Information if set */
1723 if (exti
->lan_sid
[1].header
.type
== 0)
1725 srl
->flags
[1] = exti
->lan_sid
[1].flags
;
1726 if (CHECK_FLAG(exti
->lan_sid
[1].flags
,
1727 EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
1728 srl
->sid
[1] = GET_LABEL(ntohl(exti
->lan_sid
[1].value
));
1730 srl
->sid
[1] = ntohl(exti
->lan_sid
[1].value
);
1731 if (exti
->rmt_itf_addr
.header
.type
== 0)
1732 srl
->nhlfe
[1].nexthop
= exti
->lan_sid
[1].neighbor_id
;
1734 srl
->nhlfe
[1].nexthop
= exti
->rmt_itf_addr
.value
;
1738 /* Wrong SID Type. Abort! */
1739 XFREE(MTYPE_OSPF_SR_PARAMS
, srl
);
1743 /* Segment Routing Link is ready, update it */
1744 update_ext_link_sid(srn
, srl
, OSPF_LSA_SELF
);
1747 /* Delete Prefix or (LAN)Adjacency-SID from Extended Link Information */
1748 void ospf_sr_ext_itf_delete(struct ext_itf
*exti
)
1750 struct listnode
*node
;
1751 struct sr_node
*srn
= OspfSR
.self
;
1752 struct sr_prefix
*srp
= NULL
;
1753 struct sr_link
*srl
= NULL
;
1756 osr_debug("SR (%s): Remove Extended LSA %u.0.0.%u from self",
1757 __func__
, exti
->stype
== PREF_SID
? 7 : 8, exti
->instance
);
1759 /* Sanity check: SR-Node and Extended Prefix/Link list may have been
1760 * removed earlier when stopping OSPF or OSPF-SR */
1761 if (srn
== NULL
|| srn
->ext_prefix
== NULL
|| srn
->ext_link
== NULL
)
1764 if (exti
->stype
== PREF_SID
) {
1765 instance
= SET_OPAQUE_LSID(OPAQUE_TYPE_EXTENDED_PREFIX_LSA
,
1767 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
))
1768 if (srp
->instance
== instance
)
1771 /* Uninstall Segment Prefix SID if found */
1772 if ((srp
!= NULL
) && (srp
->instance
== instance
))
1773 ospf_zebra_delete_prefix_sid(srp
);
1775 /* Search for corresponding Segment Link for self SR-Node */
1776 instance
= SET_OPAQUE_LSID(OPAQUE_TYPE_EXTENDED_LINK_LSA
,
1778 for (ALL_LIST_ELEMENTS_RO(srn
->ext_link
, node
, srl
))
1779 if (srl
->instance
== instance
)
1782 /* Remove Segment Link if found */
1783 if ((srl
!= NULL
) && (srl
->instance
== instance
)) {
1784 del_adj_sid(srl
->nhlfe
[0]);
1785 del_adj_sid(srl
->nhlfe
[1]);
1786 listnode_delete(srn
->ext_link
, srl
);
1787 XFREE(MTYPE_OSPF_SR_PARAMS
, srl
);
1792 /* Update Segment Routing from Extended Prefix LSA */
1793 void ospf_sr_ext_prefix_lsa_update(struct ospf_lsa
*lsa
)
1795 struct sr_node
*srn
;
1796 struct tlv_header
*tlvh
;
1797 struct lsa_header
*lsah
= (struct lsa_header
*)lsa
->data
;
1798 struct sr_prefix
*srp
;
1802 osr_debug("SR (%s): Process Extended Prefix LSA 7.0.0.%u from %pI4",
1803 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1807 if (OspfSR
.neighbors
== NULL
) {
1808 flog_err(EC_OSPF_SR_INVALID_DB
,
1809 "SR (%s): Abort! no valid SR DataBase", __func__
);
1813 /* Get SR Node in hash table from Router ID */
1814 srn
= (struct sr_node
*)hash_get(OspfSR
.neighbors
,
1815 (void *)&(lsah
->adv_router
),
1816 (void *)sr_node_new
);
1820 flog_err(EC_OSPF_SR_NODE_CREATE
,
1821 "SR (%s): Abort! can't create SR node in hash table",
1826 /* Initialize TLV browsing */
1827 length
= lsa
->size
- OSPF_LSA_HEADER_SIZE
;
1828 for (tlvh
= TLV_HDR_TOP(lsah
); length
> 0 && tlvh
;
1829 tlvh
= TLV_HDR_NEXT(tlvh
)) {
1830 if (ntohs(tlvh
->type
) == EXT_TLV_LINK
) {
1831 /* Got Extended Link information */
1832 srp
= get_ext_prefix_sid(tlvh
, length
);
1833 /* Update SID if not null */
1835 srp
->instance
= ntohl(lsah
->id
.s_addr
);
1836 update_ext_prefix_sid(srn
, srp
);
1839 length
-= TLV_SIZE(tlvh
);
1843 /* Delete Segment Routing from Extended Prefix LSA */
1844 void ospf_sr_ext_prefix_lsa_delete(struct ospf_lsa
*lsa
)
1846 struct listnode
*node
;
1847 struct sr_prefix
*srp
;
1848 struct sr_node
*srn
;
1849 struct lsa_header
*lsah
= (struct lsa_header
*)lsa
->data
;
1850 uint32_t instance
= ntohl(lsah
->id
.s_addr
);
1852 osr_debug("SR (%s): Remove Extended Prefix LSA 7.0.0.%u from %pI4",
1853 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1857 if (OspfSR
.neighbors
== NULL
) {
1858 flog_err(EC_OSPF_SR_INVALID_DB
,
1859 "SR (%s): Abort! no valid SR DataBase", __func__
);
1863 /* Search SR Node in hash table from Router ID */
1864 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
,
1865 (void *)&(lsah
->adv_router
));
1868 * SR-Node may be NULL if it has been remove previously when
1869 * processing Router Information LSA deletion
1872 flog_err(EC_OSPF_SR_INVALID_DB
,
1873 "SR (%s): Stop! no entry in SRDB for SR Node %pI4",
1874 __func__
, &lsah
->adv_router
);
1878 /* Search for corresponding Segment Prefix */
1879 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
))
1880 if (srp
->instance
== instance
)
1883 /* Remove Prefix if found */
1884 if ((srp
!= NULL
) && (srp
->instance
== instance
)) {
1885 ospf_zebra_delete_prefix_sid(srp
);
1886 listnode_delete(srn
->ext_prefix
, srp
);
1887 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
1890 EC_OSPF_SR_INVALID_DB
,
1891 "SR (%s): Didn't found corresponding SR Prefix 7.0.0.%u for SR Node %pI4",
1892 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1898 * Update Prefix SID. Call by ospf_ext_pref_ism_change to
1899 * complete initial CLI command at startup.
1901 * @param ifp - Loopback interface
1902 * @param pref - Prefix address of this interface
1906 void ospf_sr_update_local_prefix(struct interface
*ifp
, struct prefix
*p
)
1908 struct listnode
*node
;
1909 struct sr_prefix
*srp
;
1912 if ((ifp
== NULL
) || (p
== NULL
))
1916 * Search if there is a Segment Prefix that correspond to this
1917 * interface or prefix, and update it if found
1919 for (ALL_LIST_ELEMENTS_RO(OspfSR
.self
->ext_prefix
, node
, srp
)) {
1920 if ((srp
->nhlfe
.ifindex
== ifp
->ifindex
)
1921 || ((IPV4_ADDR_SAME(&srp
->prefv4
.prefix
, &p
->u
.prefix4
))
1922 && (srp
->prefv4
.prefixlen
== p
->prefixlen
))) {
1924 /* Update Interface & Prefix info */
1925 srp
->nhlfe
.ifindex
= ifp
->ifindex
;
1926 IPV4_ADDR_COPY(&srp
->prefv4
.prefix
, &p
->u
.prefix4
);
1927 srp
->prefv4
.prefixlen
= p
->prefixlen
;
1928 srp
->prefv4
.family
= p
->family
;
1929 IPV4_ADDR_COPY(&srp
->nhlfe
.nexthop
, &p
->u
.prefix4
);
1931 /* OK. Let's Schedule Extended Prefix LSA */
1932 srp
->instance
= ospf_ext_schedule_prefix_index(
1933 ifp
, srp
->sid
, &srp
->prefv4
, srp
->flags
);
1936 " |- Update Node SID %pFX - %u for self SR Node",
1937 (struct prefix
*)&srp
->prefv4
, srp
->sid
);
1939 /* Install SID if NO-PHP is set and not EXPLICIT-NULL */
1940 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
)
1941 && !CHECK_FLAG(srp
->flags
,
1942 EXT_SUBTLV_PREFIX_SID_EFLG
)) {
1943 srp
->label_in
= index2label(srp
->sid
,
1945 srp
->nhlfe
.label_out
= MPLS_LABEL_IMPLICIT_NULL
;
1946 ospf_zebra_update_prefix_sid(srp
);
1953 * Following functions are used to update MPLS LFIB after a SPF run
1956 static void ospf_sr_nhlfe_update(struct hash_bucket
*bucket
, void *args
)
1959 struct sr_node
*srn
= (struct sr_node
*)bucket
->data
;
1960 struct listnode
*node
;
1961 struct sr_prefix
*srp
;
1965 osr_debug(" |- Update Prefix for SR Node %pI4", &srn
->adv_router
);
1967 /* Skip Self SR Node */
1968 if (srn
== OspfSR
.self
)
1971 /* Update Extended Prefix */
1972 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
1974 /* Keep track of valid route */
1975 old
= srp
->route
!= NULL
;
1977 /* Compute the new NHLFE */
1978 rc
= compute_prefix_nhlfe(srp
);
1980 /* Check computation result */
1982 /* Routes are not know, remove old NHLFE if any to avoid loop */
1985 ospf_zebra_delete_prefix_sid(srp
);
1987 /* Routes exist but are not ready, skip it */
1990 /* There is at least one route, update NHLFE */
1992 ospf_zebra_update_prefix_sid(srp
);
2000 void ospf_sr_update_task(struct ospf
*ospf
)
2003 struct timeval start_time
, stop_time
;
2005 /* Check ospf and SR status */
2006 if ((ospf
== NULL
) || (OspfSR
.status
!= SR_UP
))
2009 monotime(&start_time
);
2011 osr_debug("SR (%s): Start SPF update", __func__
);
2013 hash_iterate(OspfSR
.neighbors
, (void (*)(struct hash_bucket
*,
2014 void *))ospf_sr_nhlfe_update
,
2017 monotime(&stop_time
);
2019 osr_debug("SR (%s): SPF Processing Time(usecs): %lld", __func__
,
2020 (stop_time
.tv_sec
- start_time
.tv_sec
) * 1000000LL
2021 + (stop_time
.tv_usec
- start_time
.tv_usec
));
2025 * --------------------------------------
2026 * Followings are vty command functions.
2027 * --------------------------------------
2031 * Segment Routing Router configuration
2033 * Must be centralize as it concerns both Extended Link/Prefix LSA
2034 * and Router Information LSA. Choose to call it from Extended Prefix
2035 * write_config() call back.
2037 * @param vty VTY output
2041 void ospf_sr_config_write_router(struct vty
*vty
)
2043 struct listnode
*node
;
2044 struct sr_prefix
*srp
;
2047 if (OspfSR
.status
== SR_UP
)
2048 vty_out(vty
, " segment-routing on\n");
2050 upper
= OspfSR
.srgb
.start
+ OspfSR
.srgb
.size
- 1;
2051 if ((OspfSR
.srgb
.start
!= DEFAULT_SRGB_LABEL
)
2052 || (OspfSR
.srgb
.size
!= DEFAULT_SRGB_SIZE
))
2053 vty_out(vty
, " segment-routing global-block %u %u",
2054 OspfSR
.srgb
.start
, upper
);
2056 if ((OspfSR
.srlb
.start
!= DEFAULT_SRLB_LABEL
)
2057 || (OspfSR
.srlb
.end
!= DEFAULT_SRLB_END
))
2058 vty_out(vty
, " local-block %u %u\n", OspfSR
.srlb
.start
,
2063 if (OspfSR
.msd
!= 0)
2064 vty_out(vty
, " segment-routing node-msd %u\n", OspfSR
.msd
);
2066 if (OspfSR
.self
!= NULL
) {
2067 for (ALL_LIST_ELEMENTS_RO(OspfSR
.self
->ext_prefix
, node
, srp
)) {
2068 vty_out(vty
, " segment-routing prefix %pFX index %u",
2069 &srp
->prefv4
, srp
->sid
);
2070 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_EFLG
))
2071 vty_out(vty
, " explicit-null\n");
2072 else if (CHECK_FLAG(srp
->flags
,
2073 EXT_SUBTLV_PREFIX_SID_NPFLG
))
2074 vty_out(vty
, " no-php-flag\n");
2081 DEFUN(ospf_sr_enable
,
2083 "segment-routing on",
2085 "Enable Segment Routing\n")
2088 VTY_DECLVAR_INSTANCE_CONTEXT(ospf
, ospf
);
2090 if (OspfSR
.status
!= SR_OFF
)
2093 if (ospf
->vrf_id
!= VRF_DEFAULT
) {
2095 "Segment Routing is only supported in default VRF\n");
2096 return CMD_WARNING_CONFIG_FAILED
;
2099 osr_debug("SR: Segment Routing: OFF -> ON");
2101 /* Start Segment Routing */
2102 OspfSR
.status
= SR_ON
;
2103 ospf_sr_start(ospf
);
2108 DEFUN (no_ospf_sr_enable
,
2109 no_ospf_sr_enable_cmd
,
2110 "no segment-routing [on]",
2113 "Disable Segment Routing\n")
2116 if (OspfSR
.status
== SR_OFF
)
2119 osr_debug("SR: Segment Routing: ON -> OFF");
2121 /* Start by Disabling Extended Link & Prefix LSA */
2122 ospf_ext_update_sr(false);
2124 /* then, disable Router Information SR parameters */
2125 ospf_router_info_update_sr(false, OspfSR
.self
);
2127 /* Finally, stop Segment Routing */
2133 static int ospf_sr_enabled(struct vty
*vty
)
2135 if (OspfSR
.status
!= SR_OFF
)
2139 vty_out(vty
, "%% OSPF SR is not turned on\n");
2144 /* tell if two ranges [r1_lower, r1_upper] and [r2_lower,r2_upper] overlap */
2145 static bool ranges_overlap(uint32_t r1_lower
, uint32_t r1_upper
,
2146 uint32_t r2_lower
, uint32_t r2_upper
)
2148 return !((r1_upper
< r2_lower
) || (r1_lower
> r2_upper
));
2152 /* tell if a range is valid */
2153 static bool sr_range_is_valid(uint32_t lower
, uint32_t upper
, uint32_t min_size
)
2155 return (upper
>= lower
+ min_size
);
2159 * Update SRGB and/or SRLB using new CLI values.
2161 * @param gb_lower Lower bound of the SRGB
2162 * @param gb_upper Upper bound of the SRGB
2163 * @param lb_lower Lower bound of the SRLB
2164 * @param lb_upper Upper bound of the SRLB
2166 * @return 0 on success, -1 otherwise
2168 static int update_sr_blocks(uint32_t gb_lower
, uint32_t gb_upper
,
2169 uint32_t lb_lower
, uint32_t lb_upper
)
2172 /* Check if values have changed */
2173 bool gb_changed
, lb_changed
;
2174 uint32_t gb_size
= gb_upper
- gb_lower
+ 1;
2175 uint32_t lb_size
= lb_upper
- lb_lower
+ 1;
2178 (OspfSR
.srgb
.size
!= gb_size
|| OspfSR
.srgb
.start
!= gb_lower
);
2180 (OspfSR
.srlb
.end
!= lb_upper
|| OspfSR
.srlb
.start
!= lb_lower
);
2181 if (!gb_changed
&& !lb_changed
)
2184 /* Check if SR is correctly started i.e. Label Manager connected */
2185 if (OspfSR
.status
!= SR_UP
) {
2186 OspfSR
.srgb
.size
= gb_size
;
2187 OspfSR
.srgb
.start
= gb_lower
;
2188 OspfSR
.srlb
.end
= lb_upper
;
2189 OspfSR
.srlb
.start
= lb_lower
;
2193 /* Release old SRGB if it has changed and is active. */
2196 sr_global_block_delete();
2198 /* Set new SRGB values - but do not reserve yet (we need to
2199 * release the SRLB too) */
2200 OspfSR
.srgb
.size
= gb_size
;
2201 OspfSR
.srgb
.start
= gb_lower
;
2202 if (OspfSR
.self
!= NULL
) {
2203 OspfSR
.self
->srgb
.range_size
= gb_size
;
2204 OspfSR
.self
->srgb
.lower_bound
= gb_lower
;
2207 /* Release old SRLB if it has changed and reserve new block as needed.
2211 sr_local_block_delete();
2213 /* Set new SRLB values */
2214 if (sr_local_block_init(lb_lower
, lb_upper
) < 0) {
2218 if (OspfSR
.self
!= NULL
) {
2219 OspfSR
.self
->srlb
.lower_bound
= lb_lower
;
2220 OspfSR
.self
->srlb
.range_size
= lb_size
;
2225 * Try to reserve the new SRGB from the Label Manger. If the
2226 * allocation fails, disable SR until new blocks are successfully
2230 if (sr_global_block_init(OspfSR
.srgb
.start
, OspfSR
.srgb
.size
)
2237 /* Update Self SR-Node */
2238 if (OspfSR
.self
!= NULL
) {
2239 /* SRGB is reserved, set Router Information parameters */
2240 ospf_router_info_update_sr(true, OspfSR
.self
);
2242 /* and update NHLFE entries */
2244 hash_iterate(OspfSR
.neighbors
,
2245 (void (*)(struct hash_bucket
*,
2246 void *))update_in_nhlfe
,
2249 /* and update (LAN)-Adjacency SID */
2251 ospf_ext_link_srlb_update();
2257 DEFUN(sr_global_label_range
, sr_global_label_range_cmd
,
2258 "segment-routing global-block (16-1048575) (16-1048575) [local-block (16-1048575) (16-1048575)]",
2260 "Segment Routing Global Block label range\n"
2261 "Lower-bound range in decimal (16-1048575)\n"
2262 "Upper-bound range in decimal (16-1048575)\n"
2263 "Segment Routing Local Block label range\n"
2264 "Lower-bound range in decimal (16-1048575)\n"
2265 "Upper-bound range in decimal (16-1048575)\n")
2267 uint32_t lb_upper
, lb_lower
;
2268 uint32_t gb_upper
, gb_lower
;
2269 int idx_gb_low
= 2, idx_gb_up
= 3;
2270 int idx_lb_low
= 5, idx_lb_up
= 6;
2272 /* Get lower and upper bound for mandatory global-block */
2273 gb_lower
= strtoul(argv
[idx_gb_low
]->arg
, NULL
, 10);
2274 gb_upper
= strtoul(argv
[idx_gb_up
]->arg
, NULL
, 10);
2276 /* SRLB values are taken from vtysh if there, else use the known ones */
2277 lb_upper
= argc
> idx_lb_up
? strtoul(argv
[idx_lb_up
]->arg
, NULL
, 10)
2279 lb_lower
= argc
> idx_lb_low
? strtoul(argv
[idx_lb_low
]->arg
, NULL
, 10)
2280 : OspfSR
.srlb
.start
;
2282 /* check correctness of input SRGB */
2283 if (!sr_range_is_valid(gb_lower
, gb_upper
, MIN_SRGB_SIZE
)) {
2284 vty_out(vty
, "Invalid SRGB range\n");
2285 return CMD_WARNING_CONFIG_FAILED
;
2288 /* check correctness of SRLB */
2289 if (!sr_range_is_valid(lb_lower
, lb_upper
, MIN_SRLB_SIZE
)) {
2290 vty_out(vty
, "Invalid SRLB range\n");
2291 return CMD_WARNING_CONFIG_FAILED
;
2294 /* Validate SRGB against SRLB */
2295 if (ranges_overlap(gb_lower
, gb_upper
, lb_lower
, lb_upper
)) {
2297 "New SR Global Block (%u/%u) conflicts with Local Block (%u/%u)\n",
2298 gb_lower
, gb_upper
, lb_lower
, lb_upper
);
2299 return CMD_WARNING_CONFIG_FAILED
;
2302 if (update_sr_blocks(gb_lower
, gb_upper
, lb_lower
, lb_upper
) < 0)
2303 return CMD_WARNING_CONFIG_FAILED
;
2308 DEFUN(no_sr_global_label_range
, no_sr_global_label_range_cmd
,
2309 "no segment-routing global-block [(16-1048575) (16-1048575) local-block (16-1048575) (16-1048575)]",
2311 "Segment Routing Global Block label range\n"
2312 "Lower-bound range in decimal (16-1048575)\n"
2313 "Upper-bound range in decimal (16-1048575)\n"
2314 "Segment Routing Local Block label range\n"
2315 "Lower-bound range in decimal (16-1048575)\n"
2316 "Upper-bound range in decimal (16-1048575)\n")
2318 if (update_sr_blocks(DEFAULT_SRGB_LABEL
, DEFAULT_SRGB_END
,
2319 DEFAULT_SRLB_LABEL
, DEFAULT_SRLB_END
)
2321 return CMD_WARNING_CONFIG_FAILED
;
2326 #if CONFDATE > 20220528
2328 "Use of the segment-routing local-block command is deprecated, use the combined global-block command instead")
2331 DEFUN_HIDDEN(sr_local_label_range
, sr_local_label_range_cmd
,
2332 "segment-routing local-block (16-1048575) (16-1048575)",
2334 "Segment Routing Local Block label range\n"
2335 "Lower-bound range in decimal (16-1048575)\n"
2336 "Upper-bound range in decimal (16-1048575)\n")
2340 uint32_t srgb_upper
;
2344 /* Get lower and upper bound */
2345 lower
= strtoul(argv
[idx_low
]->arg
, NULL
, 10);
2346 upper
= strtoul(argv
[idx_up
]->arg
, NULL
, 10);
2348 /* check correctness of SRLB */
2349 if (!sr_range_is_valid(lower
, upper
, MIN_SRLB_SIZE
)) {
2350 vty_out(vty
, "Invalid SRLB range\n");
2351 return CMD_WARNING_CONFIG_FAILED
;
2354 /* Check if values have changed */
2355 if ((OspfSR
.srlb
.start
== lower
)
2356 && (OspfSR
.srlb
.end
== upper
))
2359 /* Validate SRLB against SRGB */
2360 srgb_upper
= OspfSR
.srgb
.start
+ OspfSR
.srgb
.size
- 1;
2362 if (ranges_overlap(OspfSR
.srgb
.start
, srgb_upper
, lower
, upper
)) {
2364 "New SR Local Block (%u/%u) conflicts with Global Block (%u/%u)\n",
2365 lower
, upper
, OspfSR
.srgb
.start
, srgb_upper
);
2366 return CMD_WARNING_CONFIG_FAILED
;
2369 if (update_sr_blocks(OspfSR
.srgb
.start
, srgb_upper
, lower
, upper
) < 0)
2370 return CMD_WARNING_CONFIG_FAILED
;
2375 DEFUN_HIDDEN(no_sr_local_label_range
, no_sr_local_label_range_cmd
,
2376 "no segment-routing local-block [(16-1048575) (16-1048575)]",
2378 "Segment Routing Local Block label range\n"
2379 "Lower-bound range in decimal (16-1048575)\n"
2380 "Upper-bound range in decimal (16-1048575)\n")
2385 /* Validate SRLB against SRGB */
2386 srgb_end
= OspfSR
.srgb
.start
+ OspfSR
.srgb
.size
- 1;
2387 if (ranges_overlap(OspfSR
.srgb
.start
, srgb_end
, DEFAULT_SRLB_LABEL
,
2388 DEFAULT_SRLB_END
)) {
2390 "New SR Local Block (%u/%u) conflicts with Global Block (%u/%u)\n",
2391 DEFAULT_SRLB_LABEL
, DEFAULT_SRLB_END
, OspfSR
.srgb
.start
,
2393 return CMD_WARNING_CONFIG_FAILED
;
2396 if (update_sr_blocks(OspfSR
.srgb
.start
, srgb_end
, DEFAULT_SRLB_LABEL
,
2399 return CMD_WARNING_CONFIG_FAILED
;
2406 "segment-routing node-msd (1-16)",
2408 "Maximum Stack Depth for this router\n"
2409 "Maximum number of label that could be stack (1-16)\n")
2414 if (!ospf_sr_enabled(vty
))
2415 return CMD_WARNING_CONFIG_FAILED
;
2418 argv_find(argv
, argc
, "(1-16)", &idx
);
2419 msd
= strtoul(argv
[idx
]->arg
, NULL
, 10);
2420 if (msd
< 1 || msd
> MPLS_MAX_LABELS
) {
2421 vty_out(vty
, "MSD must be comprise between 1 and %u\n",
2423 return CMD_WARNING_CONFIG_FAILED
;
2426 /* Check if value has changed */
2427 if (OspfSR
.msd
== msd
)
2430 /* Set this router MSD */
2432 if (OspfSR
.self
!= NULL
) {
2433 OspfSR
.self
->msd
= msd
;
2435 /* Set Router Information parameters if SR is UP */
2436 if (OspfSR
.status
== SR_UP
)
2437 ospf_router_info_update_sr(true, OspfSR
.self
);
2443 DEFUN (no_sr_node_msd
,
2445 "no segment-routing node-msd [(1-16)]",
2448 "Maximum Stack Depth for this router\n"
2449 "Maximum number of label that could be stack (1-16)\n")
2452 if (!ospf_sr_enabled(vty
))
2453 return CMD_WARNING_CONFIG_FAILED
;
2455 /* unset this router MSD */
2457 if (OspfSR
.self
!= NULL
) {
2458 OspfSR
.self
->msd
= 0;
2460 /* Set Router Information parameters if SR is UP */
2461 if (OspfSR
.status
== SR_UP
)
2462 ospf_router_info_update_sr(true, OspfSR
.self
);
2468 DEFUN (sr_prefix_sid
,
2470 "segment-routing prefix A.B.C.D/M index (0-65535) [no-php-flag|explicit-null]",
2473 "IPv4 Prefix as A.B.C.D/M\n"
2474 "SID index for this prefix in decimal (0-65535)\n"
2475 "Index value inside SRGB (lower_bound < index < upper_bound)\n"
2476 "Don't request Penultimate Hop Popping (PHP)\n"
2477 "Upstream neighbor must replace prefix-sid with explicit null label\n")
2480 struct prefix p
, pexist
;
2482 struct listnode
*node
;
2483 struct sr_prefix
*srp
, *exist
= NULL
;
2484 struct interface
*ifp
;
2485 bool no_php_flag
= false;
2486 bool exp_null
= false;
2487 bool index_in_use
= false;
2488 uint8_t desired_flags
= 0;
2490 if (!ospf_sr_enabled(vty
))
2491 return CMD_WARNING_CONFIG_FAILED
;
2493 /* Get network prefix */
2494 argv_find(argv
, argc
, "A.B.C.D/M", &idx
);
2495 if (!str2prefix(argv
[idx
]->arg
, &p
)) {
2496 vty_out(vty
, "Invalid prefix format %s\n", argv
[idx
]->arg
);
2497 return CMD_WARNING_CONFIG_FAILED
;
2500 /* Get & verify index value */
2501 argv_find(argv
, argc
, "(0-65535)", &idx
);
2502 index
= strtoul(argv
[idx
]->arg
, NULL
, 10);
2503 if (index
> OspfSR
.srgb
.size
- 1) {
2504 vty_out(vty
, "Index %u must be lower than range size %u\n",
2505 index
, OspfSR
.srgb
.size
);
2506 return CMD_WARNING_CONFIG_FAILED
;
2510 no_php_flag
= argv_find(argv
, argc
, "no-php-flag", &idx
);
2511 exp_null
= argv_find(argv
, argc
, "explicit-null", &idx
);
2513 desired_flags
|= no_php_flag
? EXT_SUBTLV_PREFIX_SID_NPFLG
: 0;
2514 desired_flags
|= exp_null
? EXT_SUBTLV_PREFIX_SID_NPFLG
: 0;
2515 desired_flags
|= exp_null
? EXT_SUBTLV_PREFIX_SID_EFLG
: 0;
2517 /* Search for an existing Prefix-SID */
2518 for (ALL_LIST_ELEMENTS_RO(OspfSR
.self
->ext_prefix
, node
, srp
)) {
2519 if (prefix_same((struct prefix
*)&srp
->prefv4
, &p
))
2521 if (srp
->sid
== index
) {
2522 index_in_use
= true;
2527 /* done if prefix segment already there with same index and flags */
2528 if (exist
&& exist
->sid
== index
&& exist
->flags
== desired_flags
)
2531 /* deny if index is already in use by a distinct prefix */
2532 if (!exist
&& index_in_use
) {
2533 vty_out(vty
, "Index %u is already used by %pFX\n", index
,
2535 return CMD_WARNING_CONFIG_FAILED
;
2538 /* First, remove old NHLFE if installed */
2539 if (exist
&& CHECK_FLAG(exist
->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
)
2540 && !CHECK_FLAG(exist
->flags
, EXT_SUBTLV_PREFIX_SID_EFLG
))
2541 ospf_zebra_delete_prefix_sid(exist
);
2543 /* Create new Extended Prefix to SRDB if not found */
2544 if (exist
== NULL
) {
2545 srp
= XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_prefix
));
2546 IPV4_ADDR_COPY(&srp
->prefv4
.prefix
, &p
.u
.prefix4
);
2547 srp
->prefv4
.prefixlen
= p
.prefixlen
;
2548 srp
->prefv4
.family
= p
.family
;
2550 srp
->type
= LOCAL_SID
;
2552 /* we work on the existing SR prefix */
2556 /* Reset labels to handle flag update */
2558 srp
->nhlfe
.label_out
= 0;
2560 srp
->flags
= desired_flags
;
2562 /* If NO PHP flag is present, compute NHLFE and set label */
2564 srp
->label_in
= index2label(srp
->sid
, OspfSR
.self
->srgb
);
2565 srp
->nhlfe
.label_out
= MPLS_LABEL_IMPLICIT_NULL
;
2568 osr_debug("SR (%s): Add new index %u to Prefix %pFX", __func__
, index
,
2569 (struct prefix
*)&srp
->prefv4
);
2571 /* Get Interface and check if it is a Loopback */
2572 ifp
= if_lookup_prefix(&p
, VRF_DEFAULT
);
2575 * Interface could be not yet available i.e. when this
2576 * command is in the configuration file, OSPF is not yet
2577 * ready. In this case, store the prefix SID for latter
2578 * update of this Extended Prefix
2581 listnode_add(OspfSR
.self
->ext_prefix
, srp
);
2583 "Interface for prefix %pFX not found. Deferred LSA flooding",
2588 if (!if_is_loopback(ifp
)) {
2589 vty_out(vty
, "interface %s is not a Loopback\n", ifp
->name
);
2590 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
2591 return CMD_WARNING_CONFIG_FAILED
;
2593 srp
->nhlfe
.ifindex
= ifp
->ifindex
;
2595 /* Add SR Prefix if new */
2597 listnode_add(OspfSR
.self
->ext_prefix
, srp
);
2599 /* Update Prefix SID if SR is UP */
2600 if (OspfSR
.status
== SR_UP
) {
2601 if (no_php_flag
&& !exp_null
)
2602 ospf_zebra_update_prefix_sid(srp
);
2606 /* Finally, update Extended Prefix LSA id SR is UP */
2607 srp
->instance
= ospf_ext_schedule_prefix_index(
2608 ifp
, srp
->sid
, &srp
->prefv4
, srp
->flags
);
2609 if (srp
->instance
== 0) {
2610 vty_out(vty
, "Unable to set index %u for prefix %pFX\n",
2618 DEFUN (no_sr_prefix_sid
,
2619 no_sr_prefix_sid_cmd
,
2620 "no segment-routing prefix A.B.C.D/M [index (0-65535)|no-php-flag|explicit-null]",
2624 "IPv4 Prefix as A.B.C.D/M\n"
2625 "SID index for this prefix in decimal (0-65535)\n"
2626 "Index value inside SRGB (lower_bound < index < upper_bound)\n"
2627 "Don't request Penultimate Hop Popping (PHP)\n"
2628 "Upstream neighbor must replace prefix-sid with explicit null label\n")
2632 struct listnode
*node
;
2633 struct sr_prefix
*srp
;
2634 struct interface
*ifp
;
2638 if (!ospf_sr_enabled(vty
))
2639 return CMD_WARNING_CONFIG_FAILED
;
2641 if (OspfSR
.status
!= SR_UP
)
2644 /* Get network prefix */
2645 argv_find(argv
, argc
, "A.B.C.D/M", &idx
);
2646 rc
= str2prefix(argv
[idx
]->arg
, &p
);
2648 vty_out(vty
, "Invalid prefix format %s\n", argv
[idx
]->arg
);
2649 return CMD_WARNING_CONFIG_FAILED
;
2652 /* check that the prefix is already set */
2653 for (ALL_LIST_ELEMENTS_RO(OspfSR
.self
->ext_prefix
, node
, srp
))
2654 if (IPV4_ADDR_SAME(&srp
->prefv4
.prefix
, &p
.u
.prefix4
)
2655 && (srp
->prefv4
.prefixlen
== p
.prefixlen
)) {
2661 vty_out(vty
, "Prefix %s is not found. Abort!\n",
2663 return CMD_WARNING_CONFIG_FAILED
;
2667 ifp
= if_lookup_by_index(srp
->nhlfe
.ifindex
, VRF_DEFAULT
);
2669 vty_out(vty
, "interface for prefix %s not found.\n",
2671 return CMD_WARNING_CONFIG_FAILED
;
2674 /* Update Extended Prefix LSA */
2675 if (!ospf_ext_schedule_prefix_index(ifp
, 0, NULL
, 0)) {
2676 vty_out(vty
, "No corresponding loopback interface. Abort!\n");
2680 osr_debug("SR (%s): Remove Prefix %pFX with index %u", __func__
,
2681 (struct prefix
*)&srp
->prefv4
, srp
->sid
);
2683 /* Delete NHLFE if NO-PHP is set and EXPLICIT NULL not set */
2684 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
)
2685 && !CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_EFLG
))
2686 ospf_zebra_delete_prefix_sid(srp
);
2688 /* OK, all is clean, remove SRP from SRDB */
2689 listnode_delete(OspfSR
.self
->ext_prefix
, srp
);
2690 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
2696 static char *sr_op2str(char *buf
, size_t size
, mpls_label_t label_in
,
2697 mpls_label_t label_out
)
2702 switch (label_out
) {
2703 case MPLS_LABEL_IMPLICIT_NULL
:
2704 snprintf(buf
, size
, "Pop(%u)", label_in
);
2706 case MPLS_LABEL_IPV4_EXPLICIT_NULL
:
2707 if (label_in
== MPLS_LABEL_IPV4_EXPLICIT_NULL
)
2708 snprintf(buf
, size
, "no-op.");
2710 snprintf(buf
, size
, "Swap(%u, null)", label_in
);
2712 case MPLS_INVALID_LABEL
:
2713 snprintf(buf
, size
, "no-op.");
2716 snprintf(buf
, size
, "Swap(%u, %u)", label_in
, label_out
);
2722 static void show_sr_prefix(struct sbuf
*sbuf
, struct json_object
*json
,
2723 struct sr_prefix
*srp
)
2726 struct listnode
*node
;
2727 struct ospf_path
*path
;
2728 struct interface
*itf
;
2729 json_object
*json_route
= NULL
, *json_obj
;
2733 char buf
[PREFIX_STRLEN
];
2736 snprintfrr(pref
, 19, "%pFX", (struct prefix
*)&srp
->prefv4
);
2737 snprintf(sid
, 22, "SR Pfx (idx %u)", srp
->sid
);
2739 json_object_string_add(json
, "prefix", pref
);
2740 json_object_int_add(json
, "sid", srp
->sid
);
2741 json_object_int_add(json
, "inputLabel", srp
->label_in
);
2743 sbuf_push(sbuf
, 0, "%18s %21s ", pref
, sid
);
2746 /* Check if it is a Local Node SID */
2747 if (srp
->type
== LOCAL_SID
) {
2748 itf
= if_lookup_by_index(srp
->nhlfe
.ifindex
, VRF_DEFAULT
);
2751 json_route
= json_object_new_array();
2752 json_object_object_add(json
, "prefixRoute",
2755 json_obj
= json_object_new_object();
2756 json_object_int_add(json_obj
, "outputLabel",
2757 srp
->nhlfe
.label_out
);
2758 json_object_string_add(json_obj
, "interface",
2759 itf
? itf
->name
: "-");
2760 json_object_string_addf(json_obj
, "nexthop", "%pI4",
2761 &srp
->nhlfe
.nexthop
);
2762 json_object_array_add(json_route
, json_obj
);
2764 sbuf_push(sbuf
, 0, "%20s %9s %15s\n",
2765 sr_op2str(op
, 32, srp
->label_in
,
2766 srp
->nhlfe
.label_out
),
2767 itf
? itf
->name
: "-",
2768 inet_ntop(AF_INET
, &srp
->nhlfe
.nexthop
,
2774 /* Check if we have a valid path for this prefix */
2775 if (srp
->route
== NULL
) {
2777 sbuf_push(sbuf
, 0, "\n");
2782 /* Process list of OSPF paths */
2783 for (ALL_LIST_ELEMENTS_RO(srp
->route
->paths
, node
, path
)) {
2784 itf
= if_lookup_by_index(path
->ifindex
, VRF_DEFAULT
);
2787 json_route
= json_object_new_array();
2788 json_object_object_add(json
, "prefixRoute",
2791 json_obj
= json_object_new_object();
2792 json_object_int_add(json_obj
, "outputLabel",
2793 path
->srni
.label_out
);
2794 json_object_string_add(json_obj
, "interface",
2795 itf
? itf
->name
: "-");
2796 json_object_string_addf(json_obj
, "nexthop", "%pI4",
2798 json_object_array_add(json_route
, json_obj
);
2800 sbuf_push(sbuf
, indent
, "%20s %9s %15s\n",
2801 sr_op2str(op
, 32, srp
->label_in
,
2802 path
->srni
.label_out
),
2803 itf
? itf
->name
: "-",
2804 inet_ntop(AF_INET
, &path
->nexthop
, buf
,
2806 /* Offset to align information for ECMP */
2812 static void show_sr_node(struct vty
*vty
, struct json_object
*json
,
2813 struct sr_node
*srn
)
2816 struct listnode
*node
;
2817 struct sr_link
*srl
;
2818 struct sr_prefix
*srp
;
2819 struct interface
*itf
;
2824 char buf
[PREFIX_STRLEN
];
2826 json_object
*json_node
= NULL
, *json_algo
, *json_obj
;
2827 json_object
*json_prefix
= NULL
, *json_link
= NULL
;
2833 sbuf_init(&sbuf
, NULL
, 0);
2836 json_node
= json_object_new_object();
2837 json_object_string_addf(json_node
, "routerID", "%pI4",
2839 json_object_int_add(json_node
, "srgbSize",
2840 srn
->srgb
.range_size
);
2841 json_object_int_add(json_node
, "srgbLabel",
2842 srn
->srgb
.lower_bound
);
2843 json_object_int_add(json_node
, "srlbSize",
2844 srn
->srlb
.range_size
);
2845 json_object_int_add(json_node
, "srlbLabel",
2846 srn
->srlb
.lower_bound
);
2847 json_algo
= json_object_new_array();
2848 json_object_object_add(json_node
, "algorithms", json_algo
);
2849 for (int i
= 0; i
< ALGORITHM_COUNT
; i
++) {
2850 if (srn
->algo
[i
] == SR_ALGORITHM_UNSET
)
2852 json_obj
= json_object_new_object();
2855 snprintf(tmp
, sizeof(tmp
), "%u", i
);
2856 json_object_string_add(json_obj
, tmp
,
2857 srn
->algo
[i
] == SR_ALGORITHM_SPF
2860 json_object_array_add(json_algo
, json_obj
);
2863 json_object_int_add(json_node
, "nodeMsd", srn
->msd
);
2865 sbuf_push(&sbuf
, 0, "SR-Node: %pI4", &srn
->adv_router
);
2866 upper
= srn
->srgb
.lower_bound
+ srn
->srgb
.range_size
- 1;
2867 sbuf_push(&sbuf
, 0, "\tSRGB: [%u/%u]",
2868 srn
->srgb
.lower_bound
, upper
);
2869 upper
= srn
->srlb
.lower_bound
+ srn
->srlb
.range_size
- 1;
2870 sbuf_push(&sbuf
, 0, "\tSRLB: [%u/%u]",
2871 srn
->srlb
.lower_bound
, upper
);
2872 sbuf_push(&sbuf
, 0, "\tAlgo.(s): %s",
2873 srn
->algo
[0] == SR_ALGORITHM_SPF
? "SPF" : "S-SPF");
2874 for (int i
= 1; i
< ALGORITHM_COUNT
; i
++) {
2875 if (srn
->algo
[i
] == SR_ALGORITHM_UNSET
)
2877 sbuf_push(&sbuf
, 0, "/%s",
2878 srn
->algo
[i
] == SR_ALGORITHM_SPF
? "SPF"
2882 sbuf_push(&sbuf
, 0, "\tMSD: %u", srn
->msd
);
2887 "\n\n Prefix or Link Node or Adj. SID Label Operation Interface Nexthop\n");
2889 "------------------ --------------------- -------------------- --------- ---------------\n");
2891 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
2894 json_prefix
= json_object_new_array();
2895 json_object_object_add(json_node
,
2899 json_obj
= json_object_new_object();
2900 show_sr_prefix(NULL
, json_obj
, srp
);
2901 json_object_array_add(json_prefix
, json_obj
);
2903 show_sr_prefix(&sbuf
, NULL
, srp
);
2907 for (ALL_LIST_ELEMENTS_RO(srn
->ext_link
, node
, srl
)) {
2908 snprintfrr(pref
, 19, "%pI4/32", &srl
->itf_addr
);
2909 snprintf(sid
, 22, "SR Adj. (lbl %u)", srl
->sid
[0]);
2910 itf
= if_lookup_by_index(srl
->nhlfe
[0].ifindex
, VRF_DEFAULT
);
2913 json_link
= json_object_new_array();
2914 json_object_object_add(
2915 json_node
, "extendedLink", json_link
);
2918 json_obj
= json_object_new_object();
2919 json_object_string_add(json_obj
, "prefix", pref
);
2920 json_object_int_add(json_obj
, "sid", srl
->sid
[0]);
2921 json_object_int_add(json_obj
, "inputLabel",
2922 srl
->nhlfe
[0].label_in
);
2923 json_object_int_add(json_obj
, "outputLabel",
2924 srl
->nhlfe
[0].label_out
);
2925 json_object_string_add(json_obj
, "interface",
2926 itf
? itf
->name
: "-");
2927 json_object_string_addf(json_obj
, "nexthop", "%pI4",
2928 &srl
->nhlfe
[0].nexthop
);
2929 json_object_array_add(json_link
, json_obj
);
2931 json_obj
= json_object_new_object();
2932 snprintf(sid
, 22, "SR Adj. (lbl %u)", srl
->sid
[1]);
2933 json_object_string_add(json_obj
, "prefix", pref
);
2934 json_object_int_add(json_obj
, "sid", srl
->sid
[1]);
2935 json_object_int_add(json_obj
, "inputLabel",
2936 srl
->nhlfe
[1].label_in
);
2937 json_object_int_add(json_obj
, "outputLabel",
2938 srl
->nhlfe
[1].label_out
);
2939 json_object_string_add(json_obj
, "interface",
2940 itf
? itf
->name
: "-");
2941 json_object_string_addf(json_obj
, "nexthop", "%pI4",
2942 &srl
->nhlfe
[1].nexthop
);
2943 json_object_array_add(json_link
, json_obj
);
2945 sbuf_push(&sbuf
, 0, "%18s %21s %20s %9s %15s\n",
2947 sr_op2str(op
, 32, srl
->nhlfe
[0].label_in
,
2948 srl
->nhlfe
[0].label_out
),
2949 itf
? itf
->name
: "-",
2950 inet_ntop(AF_INET
, &srl
->nhlfe
[0].nexthop
,
2952 snprintf(sid
, 22, "SR Adj. (lbl %u)", srl
->sid
[1]);
2953 sbuf_push(&sbuf
, 0, "%18s %21s %20s %9s %15s\n",
2955 sr_op2str(op
, 32, srl
->nhlfe
[1].label_in
,
2956 srl
->nhlfe
[1].label_out
),
2957 itf
? itf
->name
: "-",
2958 inet_ntop(AF_INET
, &srl
->nhlfe
[1].nexthop
,
2963 json_object_array_add(json
, json_node
);
2965 vty_out(vty
, "%s\n", sbuf_buf(&sbuf
));
2970 static void show_vty_srdb(struct hash_bucket
*bucket
, void *args
)
2972 struct vty
*vty
= (struct vty
*)args
;
2973 struct sr_node
*srn
= (struct sr_node
*)bucket
->data
;
2975 show_sr_node(vty
, NULL
, srn
);
2978 static void show_json_srdb(struct hash_bucket
*bucket
, void *args
)
2980 struct json_object
*json
= (struct json_object
*)args
;
2981 struct sr_node
*srn
= (struct sr_node
*)bucket
->data
;
2983 show_sr_node(NULL
, json
, srn
);
2986 DEFUN (show_ip_opsf_srdb
,
2987 show_ip_ospf_srdb_cmd
,
2988 "show ip ospf database segment-routing [adv-router A.B.C.D|self-originate] [json]",
2992 "Database summary\n"
2993 "Show Segment Routing Data Base\n"
2994 "Advertising SR node\n"
2995 "Advertising SR node ID (as an IP address)\n"
2996 "Self-originated SR node\n"
3001 struct sr_node
*srn
;
3002 bool uj
= use_json(argc
, argv
);
3003 json_object
*json
= NULL
, *json_node_array
= NULL
;
3005 if (OspfSR
.status
== SR_OFF
) {
3006 vty_out(vty
, "Segment Routing is disabled on this router\n");
3011 json
= json_object_new_object();
3012 json_node_array
= json_object_new_array();
3013 json_object_string_addf(json
, "srdbID", "%pI4",
3014 &OspfSR
.self
->adv_router
);
3015 json_object_object_add(json
, "srNodes", json_node_array
);
3018 "\n\t\tOSPF Segment Routing database for ID %pI4\n\n",
3019 &OspfSR
.self
->adv_router
);
3022 if (argv_find(argv
, argc
, "self-originate", &idx
)) {
3024 show_sr_node(vty
, json_node_array
, srn
);
3026 vty_json(vty
, json
);
3030 if (argv_find(argv
, argc
, "A.B.C.D", &idx
)) {
3031 if (!inet_aton(argv
[idx
]->arg
, &rid
)) {
3032 vty_out(vty
, "Specified Router ID %s is invalid\n",
3034 return CMD_WARNING_CONFIG_FAILED
;
3036 /* Get the SR Node from the SRDB */
3037 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
,
3039 show_sr_node(vty
, json_node_array
, srn
);
3041 vty_json(vty
, json
);
3045 /* No parameters have been provided, Iterate through all the SRDB */
3047 hash_iterate(OspfSR
.neighbors
, (void (*)(struct hash_bucket
*,
3048 void *))show_json_srdb
,
3049 (void *)json_node_array
);
3050 vty_json(vty
, json
);
3052 hash_iterate(OspfSR
.neighbors
, (void (*)(struct hash_bucket
*,
3053 void *))show_vty_srdb
,
3059 /* Install new CLI commands */
3060 void ospf_sr_register_vty(void)
3062 install_element(VIEW_NODE
, &show_ip_ospf_srdb_cmd
);
3064 install_element(OSPF_NODE
, &ospf_sr_enable_cmd
);
3065 install_element(OSPF_NODE
, &no_ospf_sr_enable_cmd
);
3066 install_element(OSPF_NODE
, &sr_global_label_range_cmd
);
3067 install_element(OSPF_NODE
, &no_sr_global_label_range_cmd
);
3068 install_element(OSPF_NODE
, &sr_local_label_range_cmd
);
3069 install_element(OSPF_NODE
, &no_sr_local_label_range_cmd
);
3070 install_element(OSPF_NODE
, &sr_node_msd_cmd
);
3071 install_element(OSPF_NODE
, &no_sr_node_msd_cmd
);
3072 install_element(OSPF_NODE
, &sr_prefix_sid_cmd
);
3073 install_element(OSPF_NODE
, &no_sr_prefix_sid_cmd
);