2 * This is an implementation of Segment Routing
3 * as per draft draft-ietf-ospf-segment-routing-extensions-24
5 * Module name: Segment Routing
7 * Author: Olivier Dugeon <olivier.dugeon@orange.com>
8 * Author: Anselme Sawadogo <anselmesawadogo@gmail.com>
10 * Copyright (C) 2016 - 2018 Orange Labs http://www.orange.com
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the Free
14 * Software Foundation; either version 2 of the License, or (at your option)
17 * This program is distributed in the hope that it will be useful, but WITHOUT
18 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
22 * You should have received a copy of the GNU General Public License along
23 * with this program; see the file COPYING; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
37 #include "libospf.h" /* for ospf interface types */
44 #include "sockunion.h" /* for inet_aton() */
51 #include "ospfd/ospfd.h"
52 #include "ospfd/ospf_interface.h"
53 #include "ospfd/ospf_ism.h"
54 #include "ospfd/ospf_asbr.h"
55 #include "ospfd/ospf_lsa.h"
56 #include "ospfd/ospf_lsdb.h"
57 #include "ospfd/ospf_neighbor.h"
58 #include "ospfd/ospf_nsm.h"
59 #include "ospfd/ospf_flood.h"
60 #include "ospfd/ospf_packet.h"
61 #include "ospfd/ospf_spf.h"
62 #include "ospfd/ospf_dump.h"
63 #include "ospfd/ospf_route.h"
64 #include "ospfd/ospf_ase.h"
65 #include "ospfd/ospf_sr.h"
66 #include "ospfd/ospf_ri.h"
67 #include "ospfd/ospf_ext.h"
68 #include "ospfd/ospf_zebra.h"
71 * Global variable to manage Segment Routing on this node.
72 * Note that all parameter values are stored in network byte order.
74 static struct ospf_sr_db OspfSR
;
75 static void ospf_sr_register_vty(void);
76 static inline void del_sid_nhlfe(struct sr_nhlfe nhlfe
);
79 * Segment Routing Data Base functions
82 /* Hash function for Segment Routing entry */
83 static unsigned int sr_hash(void *p
)
85 const struct in_addr
*rid
= p
;
87 return jhash_1word(rid
->s_addr
, 0);
90 /* Compare 2 Router ID hash entries based on SR Node */
91 static int sr_cmp(const void *p1
, const void *p2
)
93 const struct sr_node
*srn
= p1
;
94 const struct in_addr
*rid
= p2
;
96 return IPV4_ADDR_SAME(&srn
->adv_router
, rid
);
99 /* Functions to remove an SR Link */
100 static void del_sr_link(void *val
)
102 struct sr_link
*srl
= (struct sr_link
*)val
;
104 del_sid_nhlfe(srl
->nhlfe
[0]);
105 del_sid_nhlfe(srl
->nhlfe
[1]);
106 XFREE(MTYPE_OSPF_SR_PARAMS
, val
);
110 /* Functions to remove an SR Prefix */
111 static void del_sr_pref(void *val
)
113 struct sr_prefix
*srp
= (struct sr_prefix
*)val
;
115 del_sid_nhlfe(srp
->nhlfe
);
116 XFREE(MTYPE_OSPF_SR_PARAMS
, val
);
120 /* Allocate new Segment Routine node */
121 static struct sr_node
*sr_node_new(struct in_addr
*rid
)
129 /* Allocate Segment Routing node memory */
130 new = XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_node
));
134 zlog_err("SR (%s): Abort! can't create new SR node", __func__
);
138 /* Default Algorithm, SRGB and MSD */
139 for (int i
= 0; i
< ALGORITHM_COUNT
; i
++)
140 new->algo
[i
] = SR_ALGORITHM_UNSET
;
142 new->srgb
.range_size
= 0;
143 new->srgb
.lower_bound
= 0;
146 /* Create Link, Prefix and Range TLVs list */
147 new->ext_link
= list_new();
148 new->ext_prefix
= list_new();
149 new->ext_link
->del
= del_sr_link
;
150 new->ext_prefix
->del
= del_sr_pref
;
152 /* Check if list are correctly created */
153 if (new->ext_link
== NULL
|| new->ext_prefix
== NULL
) {
154 list_delete_original(new->ext_link
);
155 list_delete_original(new->ext_prefix
);
156 XFREE(MTYPE_OSPF_SR_PARAMS
, new);
160 IPV4_ADDR_COPY(&new->adv_router
, rid
);
161 new->neighbor
= NULL
;
164 if (IS_DEBUG_OSPF_SR
)
165 zlog_debug(" |- Created new SR node for %s",
166 inet_ntoa(new->adv_router
));
170 /* Delete Segment Routing node */
171 static void sr_node_del(struct sr_node
*srn
)
177 /* Clean Extended Link */
178 list_delete_and_null(&srn
->ext_link
);
180 /* Clean Prefix List */
181 list_delete_and_null(&srn
->ext_prefix
);
183 XFREE(MTYPE_OSPF_SR_PARAMS
, srn
);
186 /* Get SR Node for a given nexthop */
187 static struct sr_node
*get_sr_node_by_nexthop(struct ospf
*ospf
,
188 struct in_addr nexthop
)
190 struct ospf_interface
*oi
= NULL
;
191 struct ospf_neighbor
*nbr
= NULL
;
192 struct listnode
*node
;
193 struct route_node
*rn
;
198 if (OspfSR
.neighbors
== NULL
)
201 if (IS_DEBUG_OSPF_SR
)
202 zlog_debug(" |- Search SR-Node for nexthop %s",
205 /* First, search neighbor Router ID for this nexthop */
207 for (ALL_LIST_ELEMENTS_RO(ospf
->oiflist
, node
, oi
)) {
208 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
)) {
210 if ((nbr
) && (IPV4_ADDR_SAME(&nexthop
, &nbr
->src
))) {
222 if (IS_DEBUG_OSPF_SR
)
223 zlog_debug(" |- Found nexthop Router ID %s",
224 inet_ntoa(nbr
->router_id
));
225 /* Then, search SR Node */
226 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
, &nbr
->router_id
);
232 * Segment Routing Initialization functions
235 /* Segment Routing starter function */
236 static int ospf_sr_start(struct ospf
*ospf
)
238 struct route_node
*rn
;
239 struct ospf_lsa
*lsa
;
243 if (IS_DEBUG_OSPF_SR
)
244 zlog_debug("SR (%s): Start Segment Routing", __func__
);
246 /* Initialize self SR Node */
247 srn
= hash_get(OspfSR
.neighbors
, (void *)&(ospf
->router_id
),
248 (void *)sr_node_new
);
254 /* Complete & Store self SR Node */
255 srn
->srgb
.range_size
= OspfSR
.srgb
.range_size
;
256 srn
->srgb
.lower_bound
= OspfSR
.srgb
.lower_bound
;
257 srn
->algo
[0] = OspfSR
.algo
[0];
258 srn
->msd
= OspfSR
.msd
;
261 if (IS_DEBUG_OSPF_EVENT
)
262 zlog_debug("SR (%s): Update SR-DB from LSDB", __func__
);
264 /* Start by looking to Router Info & Extended LSA in lsdb */
265 if ((ospf
!= NULL
) && (ospf
->backbone
!= NULL
)) {
266 LSDB_LOOP(OPAQUE_AREA_LSDB(ospf
->backbone
), rn
, lsa
)
268 if (IS_LSA_MAXAGE(lsa
) || IS_LSA_SELF(lsa
))
271 GET_OPAQUE_TYPE(ntohl(lsa
->data
->id
.s_addr
));
273 case OPAQUE_TYPE_ROUTER_INFORMATION_LSA
:
274 ospf_sr_ri_lsa_update(lsa
);
276 case OPAQUE_TYPE_EXTENDED_PREFIX_LSA
:
277 ospf_sr_ext_prefix_lsa_update(lsa
);
279 case OPAQUE_TYPE_EXTENDED_LINK_LSA
:
280 ospf_sr_ext_link_lsa_update(lsa
);
292 /* Stop Segment Routing */
293 static void ospf_sr_stop(void)
296 if (IS_DEBUG_OSPF_SR
)
297 zlog_debug("SR (%s): Stop Segment Routing", __func__
);
300 * Remove all SR Nodes from the Hash table. Prefix and Link SID will
301 * be remove though list_delete_and_null() call. See sr_node_del()
303 hash_clean(OspfSR
.neighbors
, (void *)sr_node_del
);
307 * Segment Routing initialize function
311 * @return 0 if OK, -1 otherwise
313 int ospf_sr_init(void)
317 zlog_info("SR (%s): Initialize SR Data Base", __func__
);
319 memset(&OspfSR
, 0, sizeof(struct ospf_sr_db
));
320 OspfSR
.enabled
= false;
321 /* Only AREA flooding is supported in this release */
322 OspfSR
.scope
= OSPF_OPAQUE_AREA_LSA
;
324 /* Initialize SRGB, Algorithms and MSD TLVs */
325 /* Only Algorithm SPF is supported */
326 OspfSR
.algo
[0] = SR_ALGORITHM_SPF
;
327 for (int i
= 1; i
< ALGORITHM_COUNT
; i
++)
328 OspfSR
.algo
[i
] = SR_ALGORITHM_UNSET
;
330 OspfSR
.srgb
.range_size
= MPLS_DEFAULT_MAX_SRGB_SIZE
;
331 OspfSR
.srgb
.lower_bound
= MPLS_DEFAULT_MIN_SRGB_LABEL
;
334 /* Initialize Hash table for neighbor SR nodes */
335 OspfSR
.neighbors
= hash_create(sr_hash
, sr_cmp
, "OSPF_SR");
336 if (OspfSR
.neighbors
== NULL
)
339 /* Initialize Route Table for prefix */
340 OspfSR
.prefix
= route_table_init();
341 if (OspfSR
.prefix
== NULL
)
344 /* Register Segment Routing VTY command */
345 ospf_sr_register_vty();
352 * Segment Routing termination function
357 void ospf_sr_term(void)
360 /* Stop Segment Routing */
363 /* Clear SR Node Table */
364 if (OspfSR
.neighbors
)
365 hash_free(OspfSR
.neighbors
);
367 /* Clear Prefix Table */
369 route_table_finish(OspfSR
.prefix
);
371 OspfSR
.enabled
= false;
376 * Segment Routing finish function
381 void ospf_sr_finish(void)
383 /* Stop Segment Routing */
386 OspfSR
.enabled
= false;
390 * Following functions are used to manipulate the
391 * Next Hop Label Forwarding entry (NHLFE)
394 /* Compute label from index */
395 static mpls_label_t
index2label(uint32_t index
, struct sr_srgb srgb
)
399 label
= srgb
.lower_bound
+ index
;
400 if (label
> (srgb
.lower_bound
+ srgb
.range_size
))
401 return MPLS_INVALID_LABEL
;
406 /* Get neighbor full structure from address */
407 static struct ospf_neighbor
*get_neighbor_by_addr(struct ospf
*top
,
410 struct ospf_neighbor
*nbr
;
411 struct ospf_interface
*oi
;
412 struct listnode
*node
;
413 struct route_node
*rn
;
419 for (ALL_LIST_ELEMENTS_RO(top
->oiflist
, node
, oi
))
420 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
)) {
423 if (IPV4_ADDR_SAME(&nbr
->address
.u
.prefix4
,
425 || IPV4_ADDR_SAME(&nbr
->router_id
, &addr
)) {
426 route_unlock_node(rn
);
433 /* Get OSPF Path from address */
434 static struct ospf_path
*get_nexthop_by_addr(struct ospf
*top
,
435 struct prefix_ipv4 p
)
437 struct ospf_route
*or;
438 struct ospf_path
*path
;
439 struct listnode
*node
;
440 struct route_node
*rn
;
443 if ((top
== NULL
) && (top
->new_table
))
446 if (IS_DEBUG_OSPF_SR
)
447 zlog_debug(" |- Search Nexthop for prefix %s/%u",
448 inet_ntoa(p
.prefix
), p
.prefixlen
);
450 rn
= route_node_lookup(top
->new_table
, (struct prefix
*)&p
);
453 * Check if we found an OSPF route. May be NULL if SPF has not
454 * yet populate routing table for this prefix.
459 route_unlock_node(rn
);
464 /* Then search path from this route */
465 for (ALL_LIST_ELEMENTS_RO(or->paths
, node
, path
))
466 if (path
->nexthop
.s_addr
!= INADDR_ANY
|| path
->ifindex
!= 0)
472 /* Compute NHLFE entry for Extended Link */
473 static int compute_link_nhlfe(struct sr_link
*srl
)
475 struct ospf
*top
= ospf_lookup_by_vrf_id(VRF_DEFAULT
);
476 struct ospf_neighbor
*nh
;
479 if (IS_DEBUG_OSPF_SR
)
480 zlog_debug(" |- Compute NHLFE for link %s/%u",
481 inet_ntoa(srl
->nhlfe
[0].prefv4
.prefix
),
482 srl
->nhlfe
[0].prefv4
.prefixlen
);
484 /* First determine the OSPF Neighbor */
485 nh
= get_neighbor_by_addr(top
, srl
->nhlfe
[0].nexthop
);
487 /* Neighbor could be not found when OSPF Adjacency just fire up
488 * because SPF don't yet populate routing table. This NHLFE will
489 * be fixed later when SR SPF schedule will be called.
494 if (IS_DEBUG_OSPF_SR
)
495 zlog_debug(" |- Found nexthop NHLFE %s",
496 inet_ntoa(nh
->router_id
));
498 /* Set ifindex for this neighbor */
499 srl
->nhlfe
[0].ifindex
= nh
->oi
->ifp
->ifindex
;
500 srl
->nhlfe
[1].ifindex
= nh
->oi
->ifp
->ifindex
;
502 /* Set Input & Output Label */
503 if (CHECK_FLAG(srl
->flags
[0], EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
504 srl
->nhlfe
[0].label_in
= srl
->sid
[0];
506 srl
->nhlfe
[0].label_in
=
507 index2label(srl
->sid
[0], srl
->srn
->srgb
);
508 if (CHECK_FLAG(srl
->flags
[1], EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
509 srl
->nhlfe
[1].label_in
= srl
->sid
[1];
511 srl
->nhlfe
[1].label_in
=
512 index2label(srl
->sid
[1], srl
->srn
->srgb
);
514 srl
->nhlfe
[0].label_out
= MPLS_IMP_NULL_LABEL
;
515 srl
->nhlfe
[1].label_out
= MPLS_IMP_NULL_LABEL
;
522 * Compute NHLFE entry for Extended Prefix
524 * @param srp - Segment Routing Prefix
526 * @return -1 if next hop is not found, 0 if nexthop has not changed
529 static int compute_prefix_nhlfe(struct sr_prefix
*srp
)
531 struct ospf
*top
= ospf_lookup_by_vrf_id(VRF_DEFAULT
);
532 struct ospf_path
*nh
= NULL
;
533 struct sr_node
*srnext
;
536 if (IS_DEBUG_OSPF_SR
)
537 zlog_debug(" |- Compute NHLFE for prefix %s/%u",
538 inet_ntoa(srp
->nhlfe
.prefv4
.prefix
),
539 srp
->nhlfe
.prefv4
.prefixlen
);
541 /* First determine the nexthop */
542 nh
= get_nexthop_by_addr(top
, srp
->nhlfe
.prefv4
);
544 /* Nexthop could be not found when OSPF Adjacency just fire up
545 * because SPF don't yet populate routing table. This NHLFE will
546 * be fixed later when SR SPF schedule will be called.
551 /* Check if NextHop has changed when call after running a new SPF */
552 if (IPV4_ADDR_SAME(&nh
->nexthop
, &srp
->nhlfe
.nexthop
)
553 && (nh
->ifindex
== srp
->nhlfe
.ifindex
))
556 if (IS_DEBUG_OSPF_SR
)
557 zlog_debug(" |- Found new next hop for this NHLFE: %s",
558 inet_ntoa(nh
->nexthop
));
561 * Get SR-Node for this nexthop. Could be not yet available
562 * as Extende Link / Prefix and Router Information are flooded
563 * after LSA Type 1 & 2 which populate the OSPF Route Table
565 srnext
= get_sr_node_by_nexthop(top
, nh
->nexthop
);
569 /* And store this information for later update if SR Node is found */
570 srnext
->neighbor
= OspfSR
.self
;
571 if (IPV4_ADDR_SAME(&srnext
->adv_router
, &srp
->adv_router
))
574 srp
->nexthop
= srnext
;
577 * SR Node could be known, but SRGB could be not initialize
578 * This is due to the fact that Extended Link / Prefix could
579 * be received before corresponding Router Information LSA
581 if ((srnext
== NULL
) || (srnext
->srgb
.lower_bound
== 0)
582 || (srnext
->srgb
.range_size
== 0))
585 if (IS_DEBUG_OSPF_SR
)
586 zlog_debug(" |- Found SRGB %u/%u for next hop SR-Node %s",
587 srnext
->srgb
.range_size
, srnext
->srgb
.lower_bound
,
588 inet_ntoa(srnext
->adv_router
));
590 /* Set ip addr & ifindex for this neighbor */
591 IPV4_ADDR_COPY(&srp
->nhlfe
.nexthop
, &nh
->nexthop
);
592 srp
->nhlfe
.ifindex
= nh
->ifindex
;
594 /* Compute Input Label with self SRGB */
595 srp
->nhlfe
.label_in
= index2label(srp
->sid
, OspfSR
.srgb
);
597 * and Output Label with Next hop SR Node SRGB or Implicit Null label
598 * if next hop is the destination and request PHP
600 if ((srp
->nexthop
== NULL
)
601 && (!CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
)))
602 srp
->nhlfe
.label_out
= MPLS_IMP_NULL_LABEL
;
603 else if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_VFLG
))
604 srp
->nhlfe
.label_out
= srp
->sid
;
606 srp
->nhlfe
.label_out
= index2label(srp
->sid
, srnext
->srgb
);
608 if (IS_DEBUG_OSPF_SR
)
609 zlog_debug(" |- Computed new labels in: %u out: %u",
610 srp
->nhlfe
.label_in
, srp
->nhlfe
.label_out
);
616 /* Send MPLS Label entry to Zebra for installation or deletion */
617 static int ospf_zebra_send_mpls_labels(int cmd
, struct sr_nhlfe nhlfe
)
625 zclient_create_header(s
, cmd
, VRF_DEFAULT
);
626 stream_putc(s
, ZEBRA_LSP_SR
);
627 /* OSPF Segment Routing currently support only IPv4 */
628 stream_putl(s
, nhlfe
.prefv4
.family
);
629 stream_put_in_addr(s
, &nhlfe
.prefv4
.prefix
);
630 stream_putc(s
, nhlfe
.prefv4
.prefixlen
);
631 stream_put_in_addr(s
, &nhlfe
.nexthop
);
632 stream_putl(s
, nhlfe
.ifindex
);
633 stream_putc(s
, OSPF_SR_PRIORITY_DEFAULT
);
634 stream_putl(s
, nhlfe
.label_in
);
635 stream_putl(s
, nhlfe
.label_out
);
637 /* Put length at the first point of the stream. */
638 stream_putw_at(s
, 0, stream_get_endp(s
));
640 if (IS_DEBUG_OSPF_SR
)
641 zlog_debug(" |- %s LSP %u/%u for %s/%u via %u",
642 cmd
== ZEBRA_MPLS_LABELS_ADD
? "Add" : "Delete",
643 nhlfe
.label_in
, nhlfe
.label_out
,
644 inet_ntoa(nhlfe
.prefv4
.prefix
),
645 nhlfe
.prefv4
.prefixlen
, nhlfe
.ifindex
);
647 return zclient_send_message(zclient
);
650 /* Request zebra to install/remove FEC in FIB */
651 static int ospf_zebra_send_mpls_ftn(int cmd
, struct sr_nhlfe nhlfe
)
653 struct zapi_route api
;
654 struct zapi_nexthop
*api_nh
;
656 /* Support only IPv4 */
657 if (nhlfe
.prefv4
.family
!= AF_INET
)
660 memset(&api
, 0, sizeof(api
));
661 api
.vrf_id
= VRF_DEFAULT
;
662 api
.type
= ZEBRA_ROUTE_OSPF
;
663 api
.safi
= SAFI_UNICAST
;
664 memcpy(&api
.prefix
, &nhlfe
.prefv4
, sizeof(struct prefix_ipv4
));
666 if (cmd
== ZEBRA_ROUTE_ADD
) {
668 SET_FLAG(api
.message
, ZAPI_MESSAGE_METRIC
);
669 api
.metric
= OSPF_SR_DEFAULT_METRIC
;
671 SET_FLAG(api
.message
, ZAPI_MESSAGE_NEXTHOP
);
672 api_nh
= &api
.nexthops
[0];
673 IPV4_ADDR_COPY(&api_nh
->gate
.ipv4
, &nhlfe
.nexthop
);
674 api_nh
->type
= NEXTHOP_TYPE_IPV4_IFINDEX
;
675 api_nh
->ifindex
= nhlfe
.ifindex
;
677 SET_FLAG(api
.message
, ZAPI_MESSAGE_LABEL
);
678 api_nh
->labels
[0] = nhlfe
.label_out
;
679 api_nh
->label_num
= 1;
683 if (IS_DEBUG_OSPF_SR
)
684 zlog_debug(" |- %s FEC %u for %s/%u via %u",
685 cmd
== ZEBRA_ROUTE_ADD
? "Add" : "Delete",
686 nhlfe
.label_out
, inet_ntoa(nhlfe
.prefv4
.prefix
),
687 nhlfe
.prefv4
.prefixlen
, nhlfe
.ifindex
);
689 return zclient_route_send(cmd
, zclient
, &api
);
692 /* Add new NHLFE entry for SID */
693 static inline void add_sid_nhlfe(struct sr_nhlfe nhlfe
)
695 if ((nhlfe
.label_in
!= 0) && (nhlfe
.label_out
!= 0)) {
696 ospf_zebra_send_mpls_labels(ZEBRA_MPLS_LABELS_ADD
, nhlfe
);
697 if (nhlfe
.label_out
!= MPLS_IMP_NULL_LABEL
)
698 ospf_zebra_send_mpls_ftn(ZEBRA_ROUTE_ADD
, nhlfe
);
702 /* Remove NHLFE entry for SID */
703 static inline void del_sid_nhlfe(struct sr_nhlfe nhlfe
)
705 if ((nhlfe
.label_in
!= 0) && (nhlfe
.label_out
!= 0)) {
706 ospf_zebra_send_mpls_labels(ZEBRA_MPLS_LABELS_DELETE
, nhlfe
);
707 if (nhlfe
.label_out
!= MPLS_IMP_NULL_LABEL
)
708 ospf_zebra_send_mpls_ftn(ZEBRA_ROUTE_DELETE
, nhlfe
);
712 /* Update NHLFE entry for SID */
713 static inline void update_sid_nhlfe(struct sr_nhlfe n1
, struct sr_nhlfe n2
)
721 * Functions to parse and get Extended Link / Prefix
725 /* Extended Link SubTLVs Getter */
726 static struct sr_link
*get_ext_link_sid(struct tlv_header
*tlvh
)
730 struct ext_tlv_link
*link
= (struct ext_tlv_link
*)tlvh
;
731 struct ext_subtlv_adj_sid
*adj_sid
;
732 struct ext_subtlv_lan_adj_sid
*lan_sid
;
733 struct ext_subtlv_rmt_itf_addr
*rmt_itf
;
735 struct tlv_header
*sub_tlvh
;
736 uint16_t length
= 0, sum
= 0, i
= 0;
738 srl
= XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_link
));
743 /* Initialize TLV browsing */
744 length
= ntohs(tlvh
->length
) - EXT_TLV_LINK_SIZE
;
745 sub_tlvh
= (struct tlv_header
*)((char *)(tlvh
) + TLV_HDR_SIZE
746 + EXT_TLV_LINK_SIZE
);
747 for (; sum
< length
; sub_tlvh
= TLV_HDR_NEXT(sub_tlvh
)) {
748 switch (ntohs(sub_tlvh
->type
)) {
749 case EXT_SUBTLV_ADJ_SID
:
750 adj_sid
= (struct ext_subtlv_adj_sid
*)sub_tlvh
;
752 i
= CHECK_FLAG(adj_sid
->flags
,
753 EXT_SUBTLV_LINK_ADJ_SID_BFLG
)
756 srl
->flags
[i
] = adj_sid
->flags
;
757 if (CHECK_FLAG(adj_sid
->flags
,
758 EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
759 srl
->sid
[i
] = GET_LABEL(ntohl(adj_sid
->value
));
761 srl
->sid
[i
] = ntohl(adj_sid
->value
);
762 IPV4_ADDR_COPY(&srl
->nhlfe
[i
].nexthop
, &link
->link_id
);
764 case EXT_SUBTLV_LAN_ADJ_SID
:
765 lan_sid
= (struct ext_subtlv_lan_adj_sid
*)sub_tlvh
;
766 srl
->type
= LAN_ADJ_SID
;
767 i
= CHECK_FLAG(lan_sid
->flags
,
768 EXT_SUBTLV_LINK_ADJ_SID_BFLG
)
771 srl
->flags
[i
] = lan_sid
->flags
;
772 if (CHECK_FLAG(lan_sid
->flags
,
773 EXT_SUBTLV_LINK_ADJ_SID_VFLG
))
774 srl
->sid
[i
] = GET_LABEL(ntohl(lan_sid
->value
));
776 srl
->sid
[i
] = ntohl(lan_sid
->value
);
777 IPV4_ADDR_COPY(&srl
->nhlfe
[i
].nexthop
,
778 &lan_sid
->neighbor_id
);
780 case EXT_SUBTLV_RMT_ITF_ADDR
:
781 rmt_itf
= (struct ext_subtlv_rmt_itf_addr
*)sub_tlvh
;
782 IPV4_ADDR_COPY(&srl
->nhlfe
[0].nexthop
, &rmt_itf
->value
);
783 IPV4_ADDR_COPY(&srl
->nhlfe
[1].nexthop
, &rmt_itf
->value
);
788 sum
+= TLV_SIZE(sub_tlvh
);
791 IPV4_ADDR_COPY(&srl
->nhlfe
[0].prefv4
.prefix
, &link
->link_data
);
792 srl
->nhlfe
[0].prefv4
.prefixlen
= IPV4_MAX_PREFIXLEN
;
793 srl
->nhlfe
[0].prefv4
.family
= AF_INET
;
794 apply_mask_ipv4(&srl
->nhlfe
[0].prefv4
);
795 IPV4_ADDR_COPY(&srl
->nhlfe
[1].prefv4
.prefix
, &link
->link_data
);
796 srl
->nhlfe
[1].prefv4
.prefixlen
= IPV4_MAX_PREFIXLEN
;
797 srl
->nhlfe
[1].prefv4
.family
= AF_INET
;
798 apply_mask_ipv4(&srl
->nhlfe
[1].prefv4
);
800 if (IS_DEBUG_OSPF_SR
) {
801 zlog_debug(" |- Found primary Adj/Lan Sid %u for %s/%u",
802 srl
->sid
[0], inet_ntoa(srl
->nhlfe
[0].prefv4
.prefix
),
803 srl
->nhlfe
[0].prefv4
.prefixlen
);
804 zlog_debug(" |- Found backup Adj/Lan Sid %u for %s/%u",
805 srl
->sid
[1], inet_ntoa(srl
->nhlfe
[1].prefv4
.prefix
),
806 srl
->nhlfe
[1].prefv4
.prefixlen
);
812 /* Extended Prefix SubTLVs Getter */
813 static struct sr_prefix
*get_ext_prefix_sid(struct tlv_header
*tlvh
)
816 struct sr_prefix
*srp
;
817 struct ext_tlv_prefix
*pref
= (struct ext_tlv_prefix
*)tlvh
;
818 struct ext_subtlv_prefix_sid
*psid
;
820 struct tlv_header
*sub_tlvh
;
821 uint16_t length
= 0, sum
= 0;
823 srp
= XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_prefix
));
828 /* Initialize TLV browsing */
829 length
= ntohs(tlvh
->length
) - EXT_TLV_PREFIX_SIZE
;
830 sub_tlvh
= (struct tlv_header
*)((char *)(tlvh
) + TLV_HDR_SIZE
831 + EXT_TLV_PREFIX_SIZE
);
832 for (; sum
< length
; sub_tlvh
= TLV_HDR_NEXT(sub_tlvh
)) {
833 switch (ntohs(sub_tlvh
->type
)) {
834 case EXT_SUBTLV_PREFIX_SID
:
835 psid
= (struct ext_subtlv_prefix_sid
*)sub_tlvh
;
836 if (psid
->algorithm
!= SR_ALGORITHM_SPF
) {
838 "SR (%s): Unsupported Algorithm",
840 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
843 srp
->type
= PREF_SID
;
844 srp
->flags
= psid
->flags
;
845 if (CHECK_FLAG(psid
->flags
, EXT_SUBTLV_PREFIX_SID_VFLG
))
846 srp
->sid
= GET_LABEL(ntohl(psid
->value
));
848 srp
->sid
= ntohl(psid
->value
);
849 IPV4_ADDR_COPY(&srp
->nhlfe
.prefv4
.prefix
,
851 srp
->nhlfe
.prefv4
.prefixlen
= pref
->pref_length
;
852 srp
->nhlfe
.prefv4
.family
= AF_INET
;
853 apply_mask_ipv4(&srp
->nhlfe
.prefv4
);
858 sum
+= TLV_SIZE(sub_tlvh
);
861 if (IS_DEBUG_OSPF_SR
)
862 zlog_debug(" |- Found SID %u for prefix %s/%u", srp
->sid
,
863 inet_ntoa(srp
->nhlfe
.prefv4
.prefix
),
864 srp
->nhlfe
.prefv4
.prefixlen
);
869 * Functions to manipulate Segment Routing Link & Prefix structures
872 /* Compare two Segment Link: return 0 if equal, 1 otherwise */
873 static inline int sr_link_cmp(struct sr_link
*srl1
, struct sr_link
*srl2
)
875 if ((srl1
->sid
[0] == srl2
->sid
[0]) && (srl1
->sid
[1] == srl2
->sid
[1])
876 && (srl1
->type
== srl2
->type
) && (srl1
->flags
[0] == srl2
->flags
[0])
877 && (srl1
->flags
[1] == srl2
->flags
[1]))
883 /* Compare two Segment Prefix: return 0 if equal, 1 otherwise */
884 static inline int sr_prefix_cmp(struct sr_prefix
*srp1
, struct sr_prefix
*srp2
)
886 if ((srp1
->sid
== srp2
->sid
) && (srp1
->flags
== srp2
->flags
))
892 /* Update Segment Link of given Segment Routing Node */
893 static void update_ext_link_sid(struct sr_node
*srn
, struct sr_link
*srl
,
896 struct listnode
*node
;
901 if ((srn
== NULL
) || (srl
== NULL
))
904 if (IS_DEBUG_OSPF_SR
)
905 zlog_debug(" |- Process Extended Link Adj/Lan-SID");
907 /* Process only Local Adj/Lan_Adj SID coming from LSA SELF */
908 if (!CHECK_FLAG(srl
->flags
[0], EXT_SUBTLV_LINK_ADJ_SID_LFLG
)
909 || !CHECK_FLAG(srl
->flags
[1], EXT_SUBTLV_LINK_ADJ_SID_LFLG
)
910 || !CHECK_FLAG(lsa_flags
, OSPF_LSA_SELF
))
913 /* Search for existing Segment Link */
914 for (ALL_LIST_ELEMENTS_RO(srn
->ext_link
, node
, lk
))
915 if (lk
->instance
== srl
->instance
) {
920 if (IS_DEBUG_OSPF_SR
)
921 zlog_debug(" |- %s SR Link 8.0.0.%u for SR node %s",
922 found
? "Update" : "Add",
923 GET_OPAQUE_ID(srl
->instance
),
924 inet_ntoa(srn
->adv_router
));
926 /* if not found, add new Segment Link and install NHLFE */
928 /* Complete SR-Link and add it to SR-Node list */
930 IPV4_ADDR_COPY(&srl
->adv_router
, &srn
->adv_router
);
931 listnode_add(srn
->ext_link
, srl
);
932 /* Try to set MPLS table */
933 if (compute_link_nhlfe(srl
)) {
934 add_sid_nhlfe(srl
->nhlfe
[0]);
935 add_sid_nhlfe(srl
->nhlfe
[1]);
938 if (sr_link_cmp(lk
, srl
)) {
939 if (compute_link_nhlfe(srl
)) {
940 update_sid_nhlfe(lk
->nhlfe
[0], srl
->nhlfe
[0]);
941 update_sid_nhlfe(lk
->nhlfe
[1], srl
->nhlfe
[1]);
942 /* Replace Segment List */
943 listnode_delete(srn
->ext_link
, lk
);
944 XFREE(MTYPE_OSPF_SR_PARAMS
, lk
);
946 IPV4_ADDR_COPY(&srl
->adv_router
,
948 listnode_add(srn
->ext_link
, srl
);
950 /* New NHLFE was not found.
951 * Just free the SR Link
953 XFREE(MTYPE_OSPF_SR_PARAMS
, srl
);
957 * This is just an LSA refresh.
958 * Stop processing and free SR Link
960 XFREE(MTYPE_OSPF_SR_PARAMS
, srl
);
965 /* Update Segment Prefix of given Segment Routing Node */
966 static void update_ext_prefix_sid(struct sr_node
*srn
, struct sr_prefix
*srp
)
969 struct listnode
*node
;
970 struct sr_prefix
*pref
;
974 if (srn
== NULL
|| srp
== NULL
)
977 if (IS_DEBUG_OSPF_SR
)
978 zlog_debug(" |- Process Extended Prefix SID %u", srp
->sid
);
980 /* Process only Global Prefix SID */
981 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_LFLG
))
984 /* Search for existing Segment Prefix */
985 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, pref
))
986 if (pref
->instance
== srp
->instance
) {
991 if (IS_DEBUG_OSPF_SR
)
992 zlog_debug(" |- %s SR LSA ID 7.0.0.%u for SR node %s",
993 found
? "Update" : "Add",
994 GET_OPAQUE_ID(srp
->instance
),
995 inet_ntoa(srn
->adv_router
));
997 /* if not found, add new Segment Prefix and install NHLFE */
999 /* Complete SR-Prefix and add it to SR-Node list */
1001 IPV4_ADDR_COPY(&srp
->adv_router
, &srn
->adv_router
);
1002 listnode_add(srn
->ext_prefix
, srp
);
1003 /* Try to set MPLS table */
1004 if (compute_prefix_nhlfe(srp
) == 1)
1005 add_sid_nhlfe(srp
->nhlfe
);
1007 if (sr_prefix_cmp(pref
, srp
)) {
1008 if (compute_prefix_nhlfe(srp
) == 1) {
1009 update_sid_nhlfe(pref
->nhlfe
, srp
->nhlfe
);
1010 /* Replace Segment Prefix */
1011 listnode_delete(srn
->ext_prefix
, pref
);
1012 XFREE(MTYPE_OSPF_SR_PARAMS
, pref
);
1014 IPV4_ADDR_COPY(&srp
->adv_router
,
1016 listnode_add(srn
->ext_prefix
, srp
);
1018 /* New NHLFE was not found.
1019 * Just free the SR Prefix
1021 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
1024 /* This is just an LSA refresh.
1025 * Stop processing and free SR Prefix
1027 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
1033 * When change the FRR Self SRGB, update the NHLFE Input Label
1034 * for all Extended Prefix with SID index through hash_iterate()
1036 static void update_in_nhlfe(struct hash_backet
*backet
, void *args
)
1038 struct listnode
*node
;
1039 struct sr_node
*srn
= (struct sr_node
*)backet
->data
;
1040 struct sr_prefix
*srp
;
1041 struct sr_nhlfe
new;
1043 /* Process Every Extended Prefix for this SR-Node */
1044 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
1045 /* Process Self SRN only if NO-PHP is requested */
1046 if ((srn
== OspfSR
.self
)
1047 && !CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
))
1050 /* Process only SID Index */
1051 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_VFLG
))
1054 /* OK. Compute new NHLFE */
1055 memcpy(&new, &srp
->nhlfe
, sizeof(struct sr_nhlfe
));
1056 new.label_in
= index2label(srp
->sid
, OspfSR
.srgb
);
1057 /* Update MPLS LFIB */
1058 update_sid_nhlfe(srp
->nhlfe
, new);
1059 /* Finally update Input Label */
1060 srp
->nhlfe
.label_in
= new.label_in
;
1065 * When SRGB has changed, update NHLFE Output Label for all Extended Prefix
1066 * with SID index which use the given SR-Node as nexthop though hash_iterate()
1068 static void update_out_nhlfe(struct hash_backet
*backet
, void *args
)
1070 struct listnode
*node
;
1071 struct sr_node
*srn
= (struct sr_node
*)backet
->data
;
1072 struct sr_node
*srnext
= (struct sr_node
*)args
;
1073 struct sr_prefix
*srp
;
1074 struct sr_nhlfe
new;
1076 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
1077 /* Process only SID Index for next hop without PHP */
1078 if ((srp
->nexthop
== NULL
)
1079 && (!CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
)))
1081 memcpy(&new, &srp
->nhlfe
, sizeof(struct sr_nhlfe
));
1082 new.label_out
= index2label(srp
->sid
, srnext
->srgb
);
1083 update_sid_nhlfe(srp
->nhlfe
, new);
1084 srp
->nhlfe
.label_out
= new.label_out
;
1089 * Following functions are call when new Segment Routing LSA are received
1090 * - Router Information: ospf_sr_ri_lsa_update() & ospf_sr_ri_lsa_delete()
1091 * - Extended Link: ospf_sr_ext_link_update() & ospf_sr_ext_link_delete()
1092 * - Extended Prefix: ospf_ext_prefix_update() & ospf_sr_ext_prefix_delete()
1095 /* Update Segment Routing from Router Information LSA */
1096 void ospf_sr_ri_lsa_update(struct ospf_lsa
*lsa
)
1098 struct sr_node
*srn
;
1099 struct tlv_header
*tlvh
;
1100 struct lsa_header
*lsah
= (struct lsa_header
*)lsa
->data
;
1101 struct ri_sr_tlv_sid_label_range
*ri_srgb
;
1102 struct ri_sr_tlv_sr_algorithm
*algo
;
1103 struct sr_srgb srgb
;
1104 uint16_t length
= 0, sum
= 0;
1106 if (IS_DEBUG_OSPF_SR
)
1108 "SR (%s): Process Router "
1109 "Information LSA 4.0.0.%u from %s",
1111 GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1112 inet_ntoa(lsah
->adv_router
));
1115 if (IS_LSA_SELF(lsa
))
1118 if (OspfSR
.neighbors
== NULL
) {
1119 zlog_err("SR (%s): Abort! no valid SR DataBase", __func__
);
1123 /* Get SR Node in hash table from Router ID */
1124 srn
= hash_get(OspfSR
.neighbors
, (void *)&(lsah
->adv_router
),
1125 (void *)sr_node_new
);
1130 "SR (%s): Abort! can't create SR node in hash table",
1135 if ((srn
->instance
!= 0) && (srn
->instance
!= ntohl(lsah
->id
.s_addr
))) {
1137 "SR (%s): Abort! Wrong "
1138 "LSA ID 4.0.0.%u for SR node %s/%u",
1140 GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1141 inet_ntoa(lsah
->adv_router
), srn
->instance
);
1145 /* Collect Router Information Sub TLVs */
1146 /* Initialize TLV browsing */
1147 length
= ntohs(lsah
->length
) - OSPF_LSA_HEADER_SIZE
;
1148 srgb
.range_size
= 0;
1149 srgb
.lower_bound
= 0;
1151 for (tlvh
= TLV_HDR_TOP(lsah
); (sum
< length
) && (tlvh
!= NULL
);
1152 tlvh
= TLV_HDR_NEXT(tlvh
)) {
1153 switch (ntohs(tlvh
->type
)) {
1154 case RI_SR_TLV_SR_ALGORITHM
:
1155 algo
= (struct ri_sr_tlv_sr_algorithm
*)tlvh
;
1158 for (i
= 0; i
< ntohs(algo
->header
.length
); i
++)
1159 srn
->algo
[i
] = algo
->value
[0];
1160 for (; i
< ALGORITHM_COUNT
; i
++)
1161 srn
->algo
[i
] = SR_ALGORITHM_UNSET
;
1162 sum
+= TLV_SIZE(tlvh
);
1164 case RI_SR_TLV_SID_LABEL_RANGE
:
1165 ri_srgb
= (struct ri_sr_tlv_sid_label_range
*)tlvh
;
1166 srgb
.range_size
= GET_RANGE_SIZE(ntohl(ri_srgb
->size
));
1168 GET_LABEL(ntohl(ri_srgb
->lower
.value
));
1169 sum
+= TLV_SIZE(tlvh
);
1171 case RI_SR_TLV_NODE_MSD
:
1172 srn
->msd
= ((struct ri_sr_tlv_node_msd
*)(tlvh
))->value
;
1173 sum
+= TLV_SIZE(tlvh
);
1176 sum
+= TLV_SIZE(tlvh
);
1181 /* Check that we collect mandatory parameters */
1182 if (srn
->algo
[0] == SR_ALGORITHM_UNSET
|| srgb
.range_size
== 0
1183 || srgb
.lower_bound
== 0) {
1185 "SR (%s): Missing mandatory parameters. Abort!",
1187 hash_release(OspfSR
.neighbors
, &(srn
->adv_router
));
1188 XFREE(MTYPE_OSPF_SR_PARAMS
, srn
);
1192 /* Check if it is a new SR Node or not */
1193 if (srn
->instance
== 0) {
1195 srn
->instance
= ntohl(lsah
->id
.s_addr
);
1197 srn
->srgb
.range_size
= srgb
.range_size
;
1198 srn
->srgb
.lower_bound
= srgb
.lower_bound
;
1201 /* Check if SRGB has changed */
1202 if ((srn
->srgb
.range_size
!= srgb
.range_size
)
1203 || (srn
->srgb
.lower_bound
!= srgb
.lower_bound
)) {
1204 srn
->srgb
.range_size
= srgb
.range_size
;
1205 srn
->srgb
.lower_bound
= srgb
.lower_bound
;
1206 /* Update NHLFE if it is a neighbor SR node */
1207 if (srn
->neighbor
== OspfSR
.self
)
1208 hash_iterate(OspfSR
.neighbors
,
1209 (void (*)(struct hash_backet
*,
1210 void *))update_out_nhlfe
,
1217 * Delete SR Node entry in hash table information corresponding to an expired
1218 * Router Information LSA
1220 void ospf_sr_ri_lsa_delete(struct ospf_lsa
*lsa
)
1222 struct sr_node
*srn
;
1223 struct lsa_header
*lsah
= (struct lsa_header
*)lsa
->data
;
1225 if (IS_DEBUG_OSPF_SR
)
1227 "SR (%s): Remove SR node %s from lsa_id 4.0.0.%u",
1228 __func__
, inet_ntoa(lsah
->adv_router
),
1229 GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)));
1232 if (OspfSR
.neighbors
== NULL
) {
1233 zlog_err("SR (%s): Abort! no valid SR Data Base", __func__
);
1237 /* Release Router ID entry in SRDB hash table */
1238 srn
= hash_release(OspfSR
.neighbors
, &(lsah
->adv_router
));
1243 "SR (%s): Abort! no entry in SRDB for SR Node %s",
1244 __func__
, inet_ntoa(lsah
->adv_router
));
1248 if ((srn
->instance
!= 0) && (srn
->instance
!= ntohl(lsah
->id
.s_addr
))) {
1250 "SR (%s): Abort! Wrong LSA ID 4.0.0.%u for SR node %s",
1251 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1252 inet_ntoa(lsah
->adv_router
));
1256 /* Remove SR node */
1261 /* Update Segment Routing from Extended Link LSA */
1262 void ospf_sr_ext_link_lsa_update(struct ospf_lsa
*lsa
)
1264 struct sr_node
*srn
;
1265 struct tlv_header
*tlvh
;
1266 struct lsa_header
*lsah
= (struct lsa_header
*)lsa
->data
;
1267 struct sr_link
*srl
;
1269 uint16_t length
, sum
;
1271 if (IS_DEBUG_OSPF_SR
)
1273 "SR (%s): Process Extended Link LSA 8.0.0.%u from %s",
1274 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1275 inet_ntoa(lsah
->adv_router
));
1278 if (OspfSR
.neighbors
== NULL
) {
1279 zlog_err("SR (%s): Abort! no valid SR DataBase", __func__
);
1283 /* Get SR Node in hash table from Router ID */
1284 srn
= (struct sr_node
*)hash_get(OspfSR
.neighbors
,
1285 (void *)&(lsah
->adv_router
),
1286 (void *)sr_node_new
);
1291 "SR (%s): Abort! can't create SR node in hash table",
1296 /* Initialize TLV browsing */
1297 length
= ntohs(lsah
->length
) - OSPF_LSA_HEADER_SIZE
;
1299 for (tlvh
= TLV_HDR_TOP(lsah
); (sum
< length
) && (tlvh
!= NULL
);
1300 tlvh
= TLV_HDR_NEXT(tlvh
)) {
1301 if (ntohs(tlvh
->type
) == EXT_TLV_LINK
) {
1302 /* Got Extended Link information */
1303 srl
= get_ext_link_sid(tlvh
);
1304 /* Update SID if not null */
1306 srl
->instance
= ntohl(lsah
->id
.s_addr
);
1307 update_ext_link_sid(srn
, srl
, lsa
->flags
);
1310 sum
+= TLV_SIZE(tlvh
);
1314 /* Delete Segment Routing from Extended Link LSA */
1315 void ospf_sr_ext_link_lsa_delete(struct ospf_lsa
*lsa
)
1317 struct listnode
*node
;
1318 struct sr_link
*srl
;
1319 struct sr_node
*srn
;
1320 struct lsa_header
*lsah
= (struct lsa_header
*)lsa
->data
;
1321 uint32_t instance
= ntohl(lsah
->id
.s_addr
);
1323 if (IS_DEBUG_OSPF_SR
)
1325 "SR (%s): Remove Extended Link LSA 8.0.0.%u from %s",
1326 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1327 inet_ntoa(lsah
->adv_router
));
1330 if (OspfSR
.neighbors
== NULL
) {
1331 zlog_err("SR (%s): Abort! no valid SR DataBase", __func__
);
1335 /* Search SR Node in hash table from Router ID */
1336 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
,
1337 (void *)&(lsah
->adv_router
));
1340 * SR-Node may be NULL if it has been remove previously when
1341 * processing Router Information LSA deletion
1345 "SR (%s): Stop! no entry in SRDB for SR Node %s",
1346 __func__
, inet_ntoa(lsah
->adv_router
));
1350 /* Search for corresponding Segment Link */
1351 for (ALL_LIST_ELEMENTS_RO(srn
->ext_link
, node
, srl
))
1352 if (srl
->instance
== instance
)
1355 /* Remove Segment Link if found */
1356 if ((srl
!= NULL
) && (srl
->instance
== instance
)) {
1357 del_sid_nhlfe(srl
->nhlfe
[0]);
1358 del_sid_nhlfe(srl
->nhlfe
[1]);
1359 listnode_delete(srn
->ext_link
, srl
);
1360 XFREE(MTYPE_OSPF_SR_PARAMS
, srl
);
1363 "SR (%s): Didn't found corresponding SR Link 8.0.0.%u "
1364 "for SR Node %s", __func__
,
1365 GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1366 inet_ntoa(lsah
->adv_router
));
1371 /* Update Segment Routing from Extended Prefix LSA */
1372 void ospf_sr_ext_prefix_lsa_update(struct ospf_lsa
*lsa
)
1374 struct sr_node
*srn
;
1375 struct tlv_header
*tlvh
;
1376 struct lsa_header
*lsah
= (struct lsa_header
*)lsa
->data
;
1377 struct sr_prefix
*srp
;
1379 uint16_t length
, sum
;
1381 if (IS_DEBUG_OSPF_SR
)
1383 "SR (%s): Process Extended Prefix LSA "
1384 "7.0.0.%u from %s", __func__
,
1385 GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1386 inet_ntoa(lsah
->adv_router
));
1389 if (OspfSR
.neighbors
== NULL
) {
1390 zlog_err("SR (%s): Abort! no valid SR DataBase", __func__
);
1394 /* Get SR Node in hash table from Router ID */
1395 srn
= (struct sr_node
*)hash_get(OspfSR
.neighbors
,
1396 (void *)&(lsah
->adv_router
),
1397 (void *)sr_node_new
);
1402 "SR (%s): Abort! can't create SR node in hash table",
1407 /* Initialize TLV browsing */
1408 length
= ntohs(lsah
->length
) - OSPF_LSA_HEADER_SIZE
;
1410 for (tlvh
= TLV_HDR_TOP(lsah
); sum
< length
;
1411 tlvh
= TLV_HDR_NEXT(tlvh
)) {
1412 if (ntohs(tlvh
->type
) == EXT_TLV_LINK
) {
1413 /* Got Extended Link information */
1414 srp
= get_ext_prefix_sid(tlvh
);
1415 /* Update SID if not null */
1417 srp
->instance
= ntohl(lsah
->id
.s_addr
);
1418 update_ext_prefix_sid(srn
, srp
);
1421 sum
+= TLV_SIZE(tlvh
);
1425 /* Delete Segment Routing from Extended Prefix LSA */
1426 void ospf_sr_ext_prefix_lsa_delete(struct ospf_lsa
*lsa
)
1428 struct listnode
*node
;
1429 struct sr_prefix
*srp
;
1430 struct sr_node
*srn
;
1431 struct lsa_header
*lsah
= (struct lsa_header
*)lsa
->data
;
1432 uint32_t instance
= ntohl(lsah
->id
.s_addr
);
1434 if (IS_DEBUG_OSPF_SR
)
1436 "SR (%s): Remove Extended Prefix LSA 7.0.0.%u from %s",
1437 __func__
, GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1438 inet_ntoa(lsah
->adv_router
));
1441 if (OspfSR
.neighbors
== NULL
) {
1442 zlog_err("SR (%s): Abort! no valid SR DataBase", __func__
);
1446 /* Search SR Node in hash table from Router ID */
1447 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
,
1448 (void *)&(lsah
->adv_router
));
1451 * SR-Node may be NULL if it has been remove previously when
1452 * processing Router Information LSA deletion
1456 "SR (%s): Stop! no entry in SRDB for SR Node %s",
1457 __func__
, inet_ntoa(lsah
->adv_router
));
1461 /* Search for corresponding Segment Link */
1462 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
))
1463 if (srp
->instance
== instance
)
1466 /* Remove Segment Link if found */
1467 if ((srp
!= NULL
) && (srp
->instance
== instance
)) {
1468 del_sid_nhlfe(srp
->nhlfe
);
1469 listnode_delete(srn
->ext_link
, srp
);
1470 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
1473 "SR (%s): Didn't found corresponding SR Prefix "
1474 "7.0.0.%u for SR Node %s", __func__
,
1475 GET_OPAQUE_ID(ntohl(lsah
->id
.s_addr
)),
1476 inet_ntoa(lsah
->adv_router
));
1481 /* Get Label for Extended Link SID */
1482 /* TODO: To be replace by Zebra Label Manager */
1483 uint32_t get_ext_link_label_value(void)
1485 static uint32_t label
= ADJ_SID_MIN
- 1;
1487 if (label
< ADJ_SID_MAX
)
1494 * Update Prefix SID. Call by ospf_ext_pref_ism_change to
1495 * complete initial CLI command at startutp.
1497 * @param ifp - Loopback interface
1498 * @param pref - Prefix address of this interface
1502 void ospf_sr_update_prefix(struct interface
*ifp
, struct prefix
*p
)
1504 struct listnode
*node
;
1505 struct sr_prefix
*srp
;
1508 if ((ifp
== NULL
) || (p
== NULL
))
1512 * Search if there is a Segment Prefix that correspond to this
1513 * interface or prefix, and update it if found
1515 for (ALL_LIST_ELEMENTS_RO(OspfSR
.self
->ext_prefix
, node
, srp
)) {
1516 if ((srp
->nhlfe
.ifindex
== ifp
->ifindex
)
1517 || ((IPV4_ADDR_SAME(&srp
->nhlfe
.prefv4
.prefix
,
1519 && (srp
->nhlfe
.prefv4
.prefixlen
== p
->prefixlen
))) {
1521 /* Update Interface & Prefix info */
1522 srp
->nhlfe
.ifindex
= ifp
->ifindex
;
1523 IPV4_ADDR_COPY(&srp
->nhlfe
.prefv4
.prefix
,
1525 srp
->nhlfe
.prefv4
.prefixlen
= p
->prefixlen
;
1526 srp
->nhlfe
.prefv4
.family
= p
->family
;
1527 IPV4_ADDR_COPY(&srp
->nhlfe
.nexthop
, &p
->u
.prefix4
);
1529 /* OK. Let's Schedule Extended Prefix LSA */
1530 srp
->instance
= ospf_ext_schedule_prefix_index(ifp
,
1531 srp
->sid
, &srp
->nhlfe
.prefv4
, srp
->flags
);
1533 /* Install NHLFE if NO-PHP is requested */
1534 if (CHECK_FLAG(srp
->flags
,
1535 EXT_SUBTLV_PREFIX_SID_NPFLG
)) {
1536 srp
->nhlfe
.label_in
= index2label(srp
->sid
,
1538 srp
->nhlfe
.label_out
= MPLS_IMP_NULL_LABEL
;
1539 add_sid_nhlfe(srp
->nhlfe
);
1546 * Following functions are used to update MPLS LFIB after a SPF run
1549 static void ospf_sr_nhlfe_update(struct hash_backet
*backet
, void *args
)
1552 struct sr_node
*srn
= (struct sr_node
*)backet
->data
;
1553 struct listnode
*node
;
1554 struct sr_prefix
*srp
;
1555 struct sr_nhlfe old
;
1562 if (IS_DEBUG_OSPF_SR
)
1563 zlog_debug(" |- Update Prefix for SR Node %s",
1564 inet_ntoa(srn
->adv_router
));
1566 /* Skip Self SR Node */
1567 if (srn
== OspfSR
.self
)
1570 /* Update Extended Prefix */
1571 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
1573 /* Backup current NHLFE */
1574 memcpy(&old
, &srp
->nhlfe
, sizeof(struct sr_nhlfe
));
1576 /* Compute the new NHLFE */
1577 rc
= compute_prefix_nhlfe(srp
);
1579 /* Check computation result */
1581 /* next hop is not know, remove old NHLFE to avoid loop */
1583 del_sid_nhlfe(srp
->nhlfe
);
1585 /* next hop has not changed, skip it */
1588 /* there is a new next hop, update NHLFE */
1590 update_sid_nhlfe(old
, srp
->nhlfe
);
1598 static int ospf_sr_update_schedule(struct thread
*t
)
1602 struct timeval start_time
, stop_time
;
1604 ospf
= THREAD_ARG(t
);
1605 ospf
->t_sr_update
= NULL
;
1610 monotime(&start_time
);
1612 if (IS_DEBUG_OSPF_SR
)
1613 zlog_debug("SR (%s): Start SPF update", __func__
);
1615 hash_iterate(OspfSR
.neighbors
, (void (*)(struct hash_backet
*,
1616 void *))ospf_sr_nhlfe_update
,
1619 monotime(&stop_time
);
1622 "SR (%s): SPF Processing Time(usecs): %lld\n",
1624 (stop_time
.tv_sec
- start_time
.tv_sec
) * 1000000LL
1625 + (stop_time
.tv_usec
- start_time
.tv_usec
));
1627 OspfSR
.update
= false;
1631 #define OSPF_SR_UPDATE_INTERVAL 1
1633 void ospf_sr_update_timer_add(struct ospf
*ospf
)
1639 /* Check if an update is not alreday engage */
1643 OspfSR
.update
= true;
1645 thread_add_timer(master
, ospf_sr_update_schedule
, ospf
,
1646 OSPF_SR_UPDATE_INTERVAL
, &ospf
->t_sr_update
);
1650 * --------------------------------------
1651 * Followings are vty command functions.
1652 * --------------------------------------
1656 * Segment Routing Router configuration
1658 * Must be centralize as it concerns both Extended Link/Prefix LSA
1659 * and Router Information LSA. Choose to call it from Extended Prefix
1660 * write_config() call back.
1662 * @param vty VTY output
1666 void ospf_sr_config_write_router(struct vty
*vty
)
1668 struct listnode
*node
;
1669 struct sr_prefix
*srp
;
1671 if (OspfSR
.enabled
) {
1672 vty_out(vty
, " segment-routing on\n");
1674 if ((OspfSR
.srgb
.lower_bound
!= MPLS_DEFAULT_MIN_SRGB_LABEL
)
1675 || (OspfSR
.srgb
.range_size
!= MPLS_DEFAULT_MAX_SRGB_SIZE
)) {
1676 vty_out(vty
, " segment-routing global-block %u %u\n",
1677 OspfSR
.srgb
.lower_bound
,
1678 OspfSR
.srgb
.lower_bound
+
1679 OspfSR
.srgb
.range_size
- 1);
1681 if (OspfSR
.msd
!= 0)
1682 vty_out(vty
, " segment-routing node-msd %u\n",
1685 if (OspfSR
.self
!= NULL
) {
1686 for (ALL_LIST_ELEMENTS_RO(OspfSR
.self
->ext_prefix
, node
,
1689 " segment-routing prefix %s/%u "
1691 inet_ntoa(srp
->nhlfe
.prefv4
.prefix
),
1692 srp
->nhlfe
.prefv4
.prefixlen
, srp
->sid
,
1693 CHECK_FLAG(srp
->flags
,
1694 EXT_SUBTLV_PREFIX_SID_NPFLG
) ?
1695 " no-php-flag" : "");
1701 DEFUN(ospf_sr_enable
,
1703 "segment-routing on",
1705 "Enable Segment Routing\n")
1708 VTY_DECLVAR_INSTANCE_CONTEXT(ospf
, ospf
);
1713 if (ospf
->vrf_id
!= VRF_DEFAULT
) {
1714 vty_out(vty
, "Segment Routing is only supported in default "
1716 return CMD_WARNING_CONFIG_FAILED
;
1719 if (IS_DEBUG_OSPF_EVENT
)
1720 zlog_debug("SR: Segment Routing: OFF -> ON");
1722 /* Start Segment Routing */
1723 OspfSR
.enabled
= true;
1724 if (!ospf_sr_start(ospf
)) {
1725 zlog_warn("SR: Unable to start Segment Routing. Abort!");
1729 /* Set Router Information SR parameters */
1730 if (IS_DEBUG_OSPF_EVENT
)
1731 zlog_debug("SR: Activate SR for Router Information LSA");
1733 ospf_router_info_update_sr(true, OspfSR
.srgb
, OspfSR
.msd
);
1735 /* Update Ext LSA */
1736 if (IS_DEBUG_OSPF_EVENT
)
1737 zlog_debug("SR: Activate SR for Extended Link/Prefix LSA");
1739 ospf_ext_update_sr(true);
1744 DEFUN (no_ospf_sr_enable
,
1745 no_ospf_sr_enable_cmd
,
1746 "no segment-routing [on]",
1749 "Disable Segment Routing\n")
1752 if (!OspfSR
.enabled
)
1755 if (IS_DEBUG_OSPF_EVENT
)
1756 zlog_debug("SR: Segment Routing: ON -> OFF");
1758 /* Start by Disabling Extended Link & Prefix LSA */
1759 ospf_ext_update_sr(false);
1761 /* then, disable Router Information SR parameters */
1762 ospf_router_info_update_sr(false, OspfSR
.srgb
, OspfSR
.msd
);
1764 /* Finally, stop Segment Routing */
1766 OspfSR
.enabled
= false;
1771 static int ospf_sr_enabled(struct vty
*vty
)
1777 vty_out(vty
, "%% OSPF SR is not turned on\n");
1782 DEFUN (sr_sid_label_range
,
1783 sr_sid_label_range_cmd
,
1784 "segment-routing global-block (0-1048575) (0-1048575)",
1786 "Segment Routing Global Block label range\n"
1787 "Lower-bound range in decimal (0-1048575)\n"
1788 "Upper-bound range in decimal (0-1048575)\n")
1796 if (!ospf_sr_enabled(vty
))
1797 return CMD_WARNING_CONFIG_FAILED
;
1799 /* Get lower and upper bound */
1800 lower
= strtoul(argv
[idx_low
]->arg
, NULL
, 10);
1801 upper
= strtoul(argv
[idx_up
]->arg
, NULL
, 10);
1802 size
= upper
- lower
+ 1;
1804 if (size
> MPLS_DEFAULT_MAX_SRGB_SIZE
|| size
<= 0) {
1806 "Range size cannot be less than 0 or more than %u\n",
1807 MPLS_DEFAULT_MAX_SRGB_SIZE
);
1808 return CMD_WARNING_CONFIG_FAILED
;
1811 if (upper
> MPLS_DEFAULT_MAX_SRGB_LABEL
) {
1812 vty_out(vty
, "Upper-bound cannot exceed %u\n",
1813 MPLS_DEFAULT_MAX_SRGB_LABEL
);
1814 return CMD_WARNING_CONFIG_FAILED
;
1817 if (upper
< MPLS_DEFAULT_MIN_SRGB_LABEL
) {
1818 vty_out(vty
, "Upper-bound cannot be lower than %u\n",
1819 MPLS_DEFAULT_MIN_SRGB_LABEL
);
1820 return CMD_WARNING_CONFIG_FAILED
;
1823 /* Check if values have changed */
1824 if ((OspfSR
.srgb
.range_size
== size
)
1825 && (OspfSR
.srgb
.lower_bound
== lower
))
1828 /* Set SID/Label range SRGB */
1829 OspfSR
.srgb
.range_size
= size
;
1830 OspfSR
.srgb
.lower_bound
= lower
;
1831 if (OspfSR
.self
!= NULL
) {
1832 OspfSR
.self
->srgb
.range_size
= size
;
1833 OspfSR
.self
->srgb
.lower_bound
= lower
;
1836 /* Set Router Information SR parameters */
1837 ospf_router_info_update_sr(true, OspfSR
.srgb
, OspfSR
.msd
);
1839 /* Update NHLFE entries */
1840 hash_iterate(OspfSR
.neighbors
,
1841 (void (*)(struct hash_backet
*, void *))update_in_nhlfe
,
1847 DEFUN (no_sr_sid_label_range
,
1848 no_sr_sid_label_range_cmd
,
1849 "no segment-routing global-block [(0-1048575) (0-1048575)]",
1852 "Segment Routing Global Block label range\n"
1853 "Lower-bound range in decimal (0-1048575)\n"
1854 "Upper-bound range in decimal (0-1048575)\n")
1857 if (!ospf_sr_enabled(vty
))
1858 return CMD_WARNING_CONFIG_FAILED
;
1860 /* Revert to default SRGB value */
1861 OspfSR
.srgb
.range_size
= MPLS_DEFAULT_MIN_SRGB_SIZE
;
1862 OspfSR
.srgb
.lower_bound
= MPLS_DEFAULT_MIN_SRGB_LABEL
;
1863 if (OspfSR
.self
!= NULL
) {
1864 OspfSR
.self
->srgb
.range_size
= OspfSR
.srgb
.range_size
;
1865 OspfSR
.self
->srgb
.lower_bound
= OspfSR
.srgb
.lower_bound
;
1868 /* Set Router Information SR parameters */
1869 ospf_router_info_update_sr(true, OspfSR
.srgb
, OspfSR
.msd
);
1871 /* Update NHLFE entries */
1872 hash_iterate(OspfSR
.neighbors
,
1873 (void (*)(struct hash_backet
*, void *))update_in_nhlfe
,
1881 "segment-routing node-msd (1-16)",
1883 "Maximum Stack Depth for this router\n"
1884 "Maximum number of label that could be stack (1-16)\n")
1889 if (!ospf_sr_enabled(vty
))
1890 return CMD_WARNING_CONFIG_FAILED
;
1893 argv_find(argv
, argc
, "(1-16)", &idx
);
1894 msd
= strtoul(argv
[idx
]->arg
, NULL
, 10);
1895 if (msd
< 1 || msd
> MPLS_MAX_LABELS
) {
1896 vty_out(vty
, "MSD must be comprise between 1 and %u\n",
1898 return CMD_WARNING_CONFIG_FAILED
;
1901 /* Check if value has changed */
1902 if (OspfSR
.msd
== msd
)
1905 /* Set this router MSD */
1907 if (OspfSR
.self
!= NULL
)
1908 OspfSR
.self
->msd
= msd
;
1910 /* Set Router Information SR parameters */
1911 ospf_router_info_update_sr(true, OspfSR
.srgb
, OspfSR
.msd
);
1916 DEFUN (no_sr_node_msd
,
1918 "no segment-routing node-msd [(1-16)]",
1921 "Maximum Stack Depth for this router\n"
1922 "Maximum number of label that could be stack (1-16)\n")
1925 if (!ospf_sr_enabled(vty
))
1926 return CMD_WARNING_CONFIG_FAILED
;
1928 /* unset this router MSD */
1930 if (OspfSR
.self
!= NULL
)
1931 OspfSR
.self
->msd
= 0;
1933 /* Set Router Information SR parameters */
1934 ospf_router_info_update_sr(true, OspfSR
.srgb
, 0);
1939 DEFUN (sr_prefix_sid
,
1941 "segment-routing prefix A.B.C.D/M index (0-65535) [no-php-flag]",
1944 "IPv4 Prefix as A.B.C.D/M\n"
1945 "SID index for this prefix in decimal (0-65535)\n"
1946 "Index value inside SRGB (lower_bound < index < upper_bound)\n"
1947 "Don't request Penultimate Hop Popping (PHP)\n")
1952 struct listnode
*node
;
1953 struct sr_prefix
*srp
, *new;
1954 struct interface
*ifp
;
1956 if (!ospf_sr_enabled(vty
))
1957 return CMD_WARNING_CONFIG_FAILED
;
1959 /* Get network prefix */
1960 argv_find(argv
, argc
, "A.B.C.D/M", &idx
);
1961 if (!str2prefix(argv
[idx
]->arg
, &p
)) {
1962 vty_out(vty
, "Invalid prefix format %s\n",
1964 return CMD_WARNING_CONFIG_FAILED
;
1967 /* Get & verify index value */
1968 argv_find(argv
, argc
, "(0-65535)", &idx
);
1969 index
= strtoul(argv
[idx
]->arg
, NULL
, 10);
1970 if (index
> OspfSR
.srgb
.range_size
- 1) {
1971 vty_out(vty
, "Index %u must be lower than range size %u\n",
1972 index
, OspfSR
.srgb
.range_size
);
1973 return CMD_WARNING_CONFIG_FAILED
;
1976 /* check that the index is not already used */
1977 for (ALL_LIST_ELEMENTS_RO(OspfSR
.self
->ext_prefix
, node
, srp
)) {
1978 if (srp
->sid
== index
) {
1979 vty_out(vty
, "Index %u is already used\n", index
);
1980 return CMD_WARNING_CONFIG_FAILED
;
1984 /* Create new Extended Prefix to SRDB if not found */
1985 new = XCALLOC(MTYPE_OSPF_SR_PARAMS
, sizeof(struct sr_prefix
));
1986 IPV4_ADDR_COPY(&new->nhlfe
.prefv4
.prefix
, &p
.u
.prefix4
);
1987 IPV4_ADDR_COPY(&new->nhlfe
.nexthop
, &p
.u
.prefix4
);
1988 new->nhlfe
.prefv4
.prefixlen
= p
.prefixlen
;
1989 new->nhlfe
.prefv4
.family
= p
.family
;
1991 /* Set NO PHP flag if present and compute NHLFE */
1992 if (argv_find(argv
, argc
, "no-php-flag", &idx
)) {
1993 SET_FLAG(new->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
);
1994 new->nhlfe
.label_in
= index2label(new->sid
, OspfSR
.self
->srgb
);
1995 new->nhlfe
.label_out
= MPLS_IMP_NULL_LABEL
;
1998 if (IS_DEBUG_OSPF_SR
)
2000 "SR (%s): Add new index %u to Prefix %s/%u",
2001 __func__
, index
, inet_ntoa(new->nhlfe
.prefv4
.prefix
),
2002 new->nhlfe
.prefv4
.prefixlen
);
2004 /* Get Interface and check if it is a Loopback */
2005 ifp
= if_lookup_prefix(&p
, VRF_DEFAULT
);
2008 * Interface could be not yet available i.e. when this
2009 * command is in the configuration file, OSPF is not yet
2010 * ready. In this case, store the prefix SID for latter
2011 * update of this Extended Prefix
2013 listnode_add(OspfSR
.self
->ext_prefix
, new);
2015 "Interface for prefix %s/%u not found. Deferred LSA "
2016 "flooding", inet_ntoa(p
.u
.prefix4
), p
.prefixlen
);
2020 if (!if_is_loopback(ifp
)) {
2021 vty_out(vty
, "interface %s is not a Loopback\n", ifp
->name
);
2022 XFREE(MTYPE_OSPF_SR_PARAMS
, new);
2023 return CMD_WARNING_CONFIG_FAILED
;
2025 new->nhlfe
.ifindex
= ifp
->ifindex
;
2027 /* Search if this prefix already exist */
2028 for (ALL_LIST_ELEMENTS_RO(OspfSR
.self
->ext_prefix
, node
, srp
)) {
2029 if ((IPV4_ADDR_SAME(&srp
->nhlfe
.prefv4
.prefix
, &p
.u
.prefix4
)
2030 && srp
->nhlfe
.prefv4
.prefixlen
== p
.prefixlen
))
2036 /* Update or Add this new SR Prefix */
2038 update_sid_nhlfe(srp
->nhlfe
, new->nhlfe
);
2039 listnode_delete(OspfSR
.self
->ext_prefix
, srp
);
2040 listnode_add(OspfSR
.self
->ext_prefix
, new);
2042 listnode_add(OspfSR
.self
->ext_prefix
, new);
2043 add_sid_nhlfe(new->nhlfe
);
2046 /* Finally, update Extended Prefix LSA */
2047 new->instance
= ospf_ext_schedule_prefix_index(ifp
, new->sid
,
2048 &new->nhlfe
.prefv4
, new->flags
);
2049 if (new->instance
== 0) {
2050 vty_out(vty
, "Unable to set index %u for prefix %s/%u\n", index
,
2051 inet_ntoa(p
.u
.prefix4
), p
.prefixlen
);
2058 DEFUN (no_sr_prefix_sid
,
2059 no_sr_prefix_sid_cmd
,
2060 "no segment-routing prefix A.B.C.D/M [index (0-65535) no-php-flag]",
2064 "IPv4 Prefix as A.B.C.D/M\n"
2065 "SID index for this prefix in decimal (0-65535)\n"
2066 "Index value inside SRGB (lower_bound < index < upper_bound)\n"
2067 "Don't request Penultimate Hop Popping (PHP)\n")
2071 struct listnode
*node
;
2072 struct sr_prefix
*srp
;
2073 struct interface
*ifp
;
2077 /* Get network prefix */
2078 argv_find(argv
, argc
, "A.B.C.D/M", &idx
);
2079 rc
= str2prefix(argv
[idx
]->arg
, &p
);
2081 vty_out(vty
, "Invalid prefix format %s\n",
2083 return CMD_WARNING_CONFIG_FAILED
;
2086 /* check that the prefix is already set */
2087 for (ALL_LIST_ELEMENTS_RO(OspfSR
.self
->ext_prefix
, node
, srp
))
2088 if (IPV4_ADDR_SAME(&srp
->nhlfe
.prefv4
.prefix
, &p
.u
.prefix4
)
2089 && (srp
->nhlfe
.prefv4
.prefixlen
== p
.prefixlen
)) {
2095 vty_out(vty
, "Prefix %s is not found. Abort!\n",
2097 return CMD_WARNING_CONFIG_FAILED
;
2101 ifp
= if_lookup_by_index(srp
->nhlfe
.ifindex
, VRF_DEFAULT
);
2103 vty_out(vty
, "interface for prefix %s not found.\n",
2105 return CMD_WARNING_CONFIG_FAILED
;
2108 /* Update Extended Prefix LSA */
2109 if (!ospf_ext_schedule_prefix_index(ifp
, 0, NULL
, 0)) {
2110 vty_out(vty
, "No corresponding loopback interface. Abort!\n");
2114 if (IS_DEBUG_OSPF_SR
)
2116 "SR (%s): Remove Prefix %s/%u with index %u",
2117 __func__
, inet_ntoa(srp
->nhlfe
.prefv4
.prefix
),
2118 srp
->nhlfe
.prefv4
.prefixlen
, srp
->sid
);
2120 /* Delete NHLFE is NO-PHP is set */
2121 if (CHECK_FLAG(srp
->flags
, EXT_SUBTLV_PREFIX_SID_NPFLG
))
2122 del_sid_nhlfe(srp
->nhlfe
);
2124 /* OK, all is clean, remove SRP from SRDB */
2125 listnode_delete(OspfSR
.self
->ext_prefix
, srp
);
2126 XFREE(MTYPE_OSPF_SR_PARAMS
, srp
);
2133 static void show_vty_sr_node(struct vty
*vty
, struct sr_node
*srn
)
2136 struct listnode
*node
;
2137 struct sr_link
*srl
;
2138 struct sr_prefix
*srp
;
2139 struct interface
*itf
;
2148 vty_out(vty
, "SR-Node: %s", inet_ntoa(srn
->adv_router
));
2149 vty_out(vty
, "\tSRGB (Size/Label): %u/%u", srn
->srgb
.range_size
,
2150 srn
->srgb
.lower_bound
);
2151 vty_out(vty
, "\tAlgorithm(s): %s",
2152 srn
->algo
[0] == SR_ALGORITHM_SPF
? "SPF" : "S-SPF");
2153 for (int i
= 1; i
< ALGORITHM_COUNT
; i
++) {
2154 if (srn
->algo
[i
] == SR_ALGORITHM_UNSET
)
2157 srn
->algo
[i
] == SR_ALGORITHM_SPF
? "SPF" : "S-SPF");
2160 vty_out(vty
, "\tMSD: %u", srn
->msd
);
2163 "\n\n Prefix or Link Label In Label Out "
2164 "Node or Adj. SID Interface Nexthop\n");
2166 "------------------ -------- --------- "
2167 "--------------------- --------- ---------------\n");
2168 for (ALL_LIST_ELEMENTS_RO(srn
->ext_prefix
, node
, srp
)) {
2169 strncpy(pref
, inet_ntoa(srp
->nhlfe
.prefv4
.prefix
), 16);
2170 snprintf(sid
, 22, "SR Pfx (idx %u)", srp
->sid
);
2171 if (srp
->nhlfe
.label_out
== MPLS_IMP_NULL_LABEL
)
2172 sprintf(label
, "pop");
2174 sprintf(label
, "%u", srp
->nhlfe
.label_out
);
2175 itf
= if_lookup_by_index(srp
->nhlfe
.ifindex
, VRF_DEFAULT
);
2176 vty_out(vty
, "%15s/%u %8u %9s %21s %9s %15s\n", pref
,
2177 srp
->nhlfe
.prefv4
.prefixlen
, srp
->nhlfe
.label_in
, label
,
2178 sid
, itf
? itf
->name
: "-",
2179 inet_ntoa(srp
->nhlfe
.nexthop
));
2182 for (ALL_LIST_ELEMENTS_RO(srn
->ext_link
, node
, srl
)) {
2183 strncpy(pref
, inet_ntoa(srl
->nhlfe
[0].prefv4
.prefix
), 16);
2184 snprintf(sid
, 22, "SR Adj. (lbl %u)", srl
->sid
[0]);
2185 if (srl
->nhlfe
[0].label_out
== MPLS_IMP_NULL_LABEL
)
2186 sprintf(label
, "pop");
2188 sprintf(label
, "%u", srl
->nhlfe
[0].label_out
);
2189 itf
= if_lookup_by_index(srl
->nhlfe
[0].ifindex
, VRF_DEFAULT
);
2190 vty_out(vty
, "%15s/%u %8u %9s %21s %9s %15s\n", pref
,
2191 srl
->nhlfe
[0].prefv4
.prefixlen
, srl
->nhlfe
[0].label_in
,
2192 label
, sid
, itf
? itf
->name
: "-",
2193 inet_ntoa(srl
->nhlfe
[0].nexthop
));
2194 snprintf(sid
, 22, "SR Adj. (lbl %u)", srl
->sid
[1]);
2195 if (srl
->nhlfe
[1].label_out
== MPLS_IMP_NULL_LABEL
)
2196 sprintf(label
, "pop");
2198 sprintf(label
, "%u", srl
->nhlfe
[0].label_out
);
2199 vty_out(vty
, "%15s/%u %8u %9s %21s %9s %15s\n", pref
,
2200 srl
->nhlfe
[1].prefv4
.prefixlen
, srl
->nhlfe
[1].label_in
,
2201 label
, sid
, itf
? itf
->name
: "-",
2202 inet_ntoa(srl
->nhlfe
[1].nexthop
));
2207 static void show_srdb_entry(struct hash_backet
*backet
, void *args
)
2209 struct vty
*vty
= (struct vty
*)args
;
2210 struct sr_node
*srn
= (struct sr_node
*)backet
->data
;
2212 show_vty_sr_node(vty
, srn
);
2215 DEFUN (show_ip_opsf_srdb
,
2216 show_ip_ospf_srdb_cmd
,
2217 "show ip ospf database segment-routing [adv-router A.B.C.D|self-originate]",
2221 "Database summary\n"
2222 "Show Segment Routing Data Base\n"
2223 "Advertising SR node\n"
2224 "Advertising SR node ID (as an IP address)\n"
2225 "Self-originated SR node\n")
2229 struct sr_node
*srn
;
2231 if (!OspfSR
.enabled
) {
2232 vty_out(vty
, "Segment Routing is disabled on this router\n");
2236 vty_out(vty
, "\n OSPF Segment Routing database for ID %s\n\n",
2237 inet_ntoa(OspfSR
.self
->adv_router
));
2239 if (argv_find(argv
, argc
, "self-originate", &idx
)) {
2241 show_vty_sr_node(vty
, srn
);
2245 if (argv_find(argv
, argc
, "A.B.C.D", &idx
)) {
2246 if (!inet_aton(argv
[idx
]->arg
, &rid
)) {
2248 "Specified Router ID %s is invalid\n",
2250 return CMD_WARNING_CONFIG_FAILED
;
2252 /* Get the SR Node from the SRDB */
2253 srn
= (struct sr_node
*)hash_lookup(OspfSR
.neighbors
,
2255 show_vty_sr_node(vty
, srn
);
2259 /* No parameters have been provided, Iterate through all the SRDB */
2262 (void (*)(struct hash_backet
*, void *))show_srdb_entry
,
2267 /* Install new CLI commands */
2268 void ospf_sr_register_vty(void)
2270 install_element(VIEW_NODE
, &show_ip_ospf_srdb_cmd
);
2272 install_element(OSPF_NODE
, &ospf_sr_enable_cmd
);
2273 install_element(OSPF_NODE
, &no_ospf_sr_enable_cmd
);
2274 install_element(OSPF_NODE
, &sr_sid_label_range_cmd
);
2275 install_element(OSPF_NODE
, &no_sr_sid_label_range_cmd
);
2276 install_element(OSPF_NODE
, &sr_node_msd_cmd
);
2277 install_element(OSPF_NODE
, &no_sr_node_msd_cmd
);
2278 install_element(OSPF_NODE
, &sr_prefix_sid_cmd
);
2279 install_element(OSPF_NODE
, &no_sr_prefix_sid_cmd
);