1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * OSPF Link State Advertisement
4 * Copyright (C) 1999, 2000 Toshiaki Takada
19 #include "sockunion.h" /* for inet_aton() */
23 #include "ospfd/ospfd.h"
24 #include "ospfd/ospf_interface.h"
25 #include "ospfd/ospf_ism.h"
26 #include "ospfd/ospf_asbr.h"
27 #include "ospfd/ospf_lsa.h"
28 #include "ospfd/ospf_lsdb.h"
29 #include "ospfd/ospf_neighbor.h"
30 #include "ospfd/ospf_nsm.h"
31 #include "ospfd/ospf_flood.h"
32 #include "ospfd/ospf_packet.h"
33 #include "ospfd/ospf_spf.h"
34 #include "ospfd/ospf_dump.h"
35 #include "ospfd/ospf_route.h"
36 #include "ospfd/ospf_ase.h"
37 #include "ospfd/ospf_zebra.h"
38 #include "ospfd/ospf_abr.h"
39 #include "ospfd/ospf_errors.h"
41 static struct ospf_lsa
*ospf_handle_summarylsa_lsId_chg(struct ospf_area
*area
,
42 struct prefix_ipv4
*p
,
45 struct in_addr old_id
);
46 static struct ospf_lsa
*
47 ospf_summary_lsa_prepare_and_flood(struct prefix_ipv4
*p
, uint32_t metric
,
48 struct ospf_area
*area
, struct in_addr id
);
49 static struct ospf_lsa
*ospf_summary_lsa_refresh(struct ospf
*ospf
,
50 struct ospf_lsa
*lsa
);
51 static struct ospf_lsa
*
52 ospf_asbr_summary_lsa_prepare_and_flood(struct prefix_ipv4
*p
, uint32_t metric
,
53 struct ospf_area
*area
,
55 static struct ospf_lsa
*ospf_summary_asbr_lsa_refresh(struct ospf
*ospf
,
56 struct ospf_lsa
*lsa
);
57 static struct ospf_lsa
*ospf_handle_exnl_lsa_lsId_chg(struct ospf
*ospf
,
58 struct external_info
*ei
,
60 static struct ospf_lsa
*
61 ospf_exnl_lsa_prepare_and_flood(struct ospf
*ospf
, struct external_info
*ei
,
64 uint32_t get_metric(uint8_t *metric
)
68 m
= (m
<< 8) + metric
[1];
69 m
= (m
<< 8) + metric
[2];
73 /** @brief The Function checks self generated DoNotAge.
75 * @return true or false.
77 bool ospf_check_dna_lsa(const struct ospf_lsa
*lsa
)
79 return ((IS_LSA_SELF(lsa
) && CHECK_FLAG(lsa
->data
->ls_age
, DO_NOT_AGE
))
84 struct timeval
int2tv(int a
)
94 struct timeval
msec2tv(int a
)
98 ret
.tv_sec
= a
/ 1000;
99 ret
.tv_usec
= (a
% 1000) * 1000;
104 int ospf_lsa_refresh_delay(struct ospf_lsa
*lsa
)
106 struct timeval delta
;
109 if (monotime_since(&lsa
->tv_orig
, &delta
)
110 < OSPF_MIN_LS_INTERVAL
* 1000LL) {
111 struct timeval minv
= msec2tv(OSPF_MIN_LS_INTERVAL
);
112 timersub(&minv
, &delta
, &minv
);
114 /* TBD: remove padding to full sec, return timeval instead */
115 delay
= minv
.tv_sec
+ !!minv
.tv_usec
;
117 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
119 "LSA[Type%d:%pI4]: Refresh timer delay %d seconds",
120 lsa
->data
->type
, &lsa
->data
->id
,
130 int get_age(struct ospf_lsa
*lsa
)
134 /* As per rfc4136, the self-originated LSAs in their
135 * own database keep aging, however rfc doesn't tell
136 * till how long the LSA should be aged, as of now
137 * we are capping it for OSPF_LSA_MAXAGE.
140 /* If LSA is marked as donotage */
141 if (CHECK_FLAG(lsa
->data
->ls_age
, DO_NOT_AGE
) && !IS_LSA_SELF(lsa
))
142 return ntohs(lsa
->data
->ls_age
);
144 monotime_since(&lsa
->tv_recv
, &rel
);
145 return ntohs(lsa
->data
->ls_age
) + rel
.tv_sec
;
149 /* Fletcher Checksum -- Refer to RFC1008. */
151 /* All the offsets are zero-based. The offsets in the RFC1008 are
153 uint16_t ospf_lsa_checksum(struct lsa_header
*lsa
)
155 uint8_t *buffer
= &lsa
->options
;
156 int options_offset
= buffer
- (uint8_t *)&lsa
->ls_age
; /* should be 2 */
158 /* Skip the AGE field */
159 uint16_t len
= ntohs(lsa
->length
) - options_offset
;
161 /* Checksum offset starts from "options" field, not the beginning of the
162 lsa_header struct. The offset is 14, rather than 16. */
163 int checksum_offset
= (uint8_t *)&lsa
->checksum
- buffer
;
165 return fletcher_checksum(buffer
, len
, checksum_offset
);
168 int ospf_lsa_checksum_valid(struct lsa_header
*lsa
)
170 uint8_t *buffer
= &lsa
->options
;
171 int options_offset
= buffer
- (uint8_t *)&lsa
->ls_age
; /* should be 2 */
173 /* Skip the AGE field */
174 uint16_t len
= ntohs(lsa
->length
) - options_offset
;
176 return (fletcher_checksum(buffer
, len
, FLETCHER_CHECKSUM_VALIDATE
)
181 /* Create OSPF LSA. */
182 struct ospf_lsa
*ospf_lsa_new(void)
184 struct ospf_lsa
*new;
186 new = XCALLOC(MTYPE_OSPF_LSA
, sizeof(struct ospf_lsa
));
190 new->retransmit_counter
= 0;
191 monotime(&new->tv_recv
);
192 new->tv_orig
= new->tv_recv
;
193 new->refresh_list
= -1;
194 new->vrf_id
= VRF_DEFAULT
;
195 new->to_be_acknowledged
= 0;
196 new->opaque_zero_len_delete
= 0;
201 struct ospf_lsa
*ospf_lsa_new_and_data(size_t size
)
203 struct ospf_lsa
*new;
205 new = ospf_lsa_new();
206 new->data
= ospf_lsa_data_new(size
);
212 /* Duplicate OSPF LSA. */
213 struct ospf_lsa
*ospf_lsa_dup(struct ospf_lsa
*lsa
)
215 struct ospf_lsa
*new;
220 new = XCALLOC(MTYPE_OSPF_LSA
, sizeof(struct ospf_lsa
));
222 memcpy(new, lsa
, sizeof(struct ospf_lsa
));
223 UNSET_FLAG(new->flags
, OSPF_LSA_DISCARD
);
225 new->retransmit_counter
= 0;
226 new->data
= ospf_lsa_data_dup(lsa
->data
);
228 /* kevinm: Clear the refresh_list, otherwise there are going
229 to be problems when we try to remove the LSA from the
230 queue (which it's not a member of.)
231 XXX: Should we add the LSA to the refresh_list queue? */
232 new->refresh_list
= -1;
234 if (IS_DEBUG_OSPF(lsa
, LSA
))
235 zlog_debug("LSA: duplicated %p (new: %p)", (void *)lsa
,
242 void ospf_lsa_free(struct ospf_lsa
*lsa
)
244 assert(lsa
->lock
== 0);
246 if (IS_DEBUG_OSPF(lsa
, LSA
))
247 zlog_debug("LSA: freed %p", (void *)lsa
);
249 /* Delete LSA data. */
250 if (lsa
->data
!= NULL
)
251 ospf_lsa_data_free(lsa
->data
);
253 assert(lsa
->refresh_list
< 0);
255 memset(lsa
, 0, sizeof(struct ospf_lsa
));
256 XFREE(MTYPE_OSPF_LSA
, lsa
);
260 struct ospf_lsa
*ospf_lsa_lock(struct ospf_lsa
*lsa
)
267 void ospf_lsa_unlock(struct ospf_lsa
**lsa
)
269 /* This is sanity check. */
275 assert((*lsa
)->lock
>= 0);
277 if ((*lsa
)->lock
== 0) {
278 assert(CHECK_FLAG((*lsa
)->flags
, OSPF_LSA_DISCARD
));
284 /* Check discard flag. */
285 void ospf_lsa_discard(struct ospf_lsa
*lsa
)
287 if (!CHECK_FLAG(lsa
->flags
, OSPF_LSA_DISCARD
)) {
288 SET_FLAG(lsa
->flags
, OSPF_LSA_DISCARD
);
289 ospf_lsa_unlock(&lsa
);
293 /* Create LSA data. */
294 struct lsa_header
*ospf_lsa_data_new(size_t size
)
296 return XCALLOC(MTYPE_OSPF_LSA_DATA
, size
);
299 /* Duplicate LSA data. */
300 struct lsa_header
*ospf_lsa_data_dup(struct lsa_header
*lsah
)
302 struct lsa_header
*new;
304 new = ospf_lsa_data_new(ntohs(lsah
->length
));
305 memcpy(new, lsah
, ntohs(lsah
->length
));
311 void ospf_lsa_data_free(struct lsa_header
*lsah
)
313 if (IS_DEBUG_OSPF(lsa
, LSA
))
314 zlog_debug("LSA[Type%d:%pI4]: data freed %p", lsah
->type
,
315 &lsah
->id
, (void *)lsah
);
317 XFREE(MTYPE_OSPF_LSA_DATA
, lsah
);
321 /* LSA general functions. */
323 const char *dump_lsa_key(struct ospf_lsa
*lsa
)
325 static char buf
[sizeof("Type255,id(255.255.255.255),ar(255.255.255.255)")+1];
326 struct lsa_header
*lsah
;
328 if (lsa
!= NULL
&& (lsah
= lsa
->data
) != NULL
) {
329 char id
[INET_ADDRSTRLEN
], ar
[INET_ADDRSTRLEN
];
330 inet_ntop(AF_INET
, &lsah
->id
, id
, sizeof(id
));
331 inet_ntop(AF_INET
, &lsah
->adv_router
, ar
, sizeof(ar
));
333 snprintf(buf
, sizeof(buf
), "Type%d,id(%s),ar(%s)", lsah
->type
,
336 strlcpy(buf
, "NULL", sizeof(buf
));
341 uint32_t lsa_seqnum_increment(struct ospf_lsa
*lsa
)
345 seqnum
= ntohl(lsa
->data
->ls_seqnum
) + 1;
347 return htonl(seqnum
);
350 void lsa_header_set(struct stream
*s
, uint8_t options
, uint8_t type
,
351 struct in_addr id
, struct in_addr router_id
)
353 struct lsa_header
*lsah
;
355 lsah
= (struct lsa_header
*)STREAM_DATA(s
);
357 lsah
->ls_age
= htons(OSPF_LSA_INITIAL_AGE
);
358 lsah
->options
= options
;
361 lsah
->adv_router
= router_id
;
362 lsah
->ls_seqnum
= htonl(OSPF_INITIAL_SEQUENCE_NUMBER
);
364 stream_forward_endp(s
, OSPF_LSA_HEADER_SIZE
);
368 /* router-LSA related functions. */
369 /* Get router-LSA flags. */
370 uint8_t router_lsa_flags(struct ospf_area
*area
)
374 flags
= area
->ospf
->flags
;
376 /* Set virtual link flag. */
377 if (ospf_full_virtual_nbrs(area
))
378 SET_FLAG(flags
, ROUTER_LSA_VIRTUAL
);
380 /* Just sanity check */
381 UNSET_FLAG(flags
, ROUTER_LSA_VIRTUAL
);
383 /* Set Shortcut ABR behabiour flag. */
384 UNSET_FLAG(flags
, ROUTER_LSA_SHORTCUT
);
385 if (area
->ospf
->abr_type
== OSPF_ABR_SHORTCUT
)
386 if (!OSPF_IS_AREA_BACKBONE(area
))
387 if ((area
->shortcut_configured
== OSPF_SHORTCUT_DEFAULT
388 && area
->ospf
->backbone
== NULL
)
389 || area
->shortcut_configured
390 == OSPF_SHORTCUT_ENABLE
)
391 SET_FLAG(flags
, ROUTER_LSA_SHORTCUT
);
393 /* ASBR can't exit in stub area. */
394 if (area
->external_routing
== OSPF_AREA_STUB
)
395 UNSET_FLAG(flags
, ROUTER_LSA_EXTERNAL
);
396 /* If ASBR set External flag */
397 else if (IS_OSPF_ASBR(area
->ospf
))
398 SET_FLAG(flags
, ROUTER_LSA_EXTERNAL
);
400 /* Set ABR dependent flags */
401 if (IS_OSPF_ABR(area
->ospf
)) {
402 SET_FLAG(flags
, ROUTER_LSA_BORDER
);
403 /* If Area is NSSA and we are both ABR and unconditional
405 * set Nt bit to inform other routers.
407 if ((area
->external_routing
== OSPF_AREA_NSSA
)
408 && (area
->NSSATranslatorRole
== OSPF_NSSA_ROLE_ALWAYS
))
409 SET_FLAG(flags
, ROUTER_LSA_NT
);
414 /* Lookup neighbor other than myself.
415 And check neighbor count,
416 Point-to-Point link must have only 1 neighbor. */
417 struct ospf_neighbor
*ospf_nbr_lookup_ptop(struct ospf_interface
*oi
)
419 struct ospf_neighbor
*nbr
= NULL
;
420 struct route_node
*rn
;
422 /* Search neighbor, there must be one of two nbrs. */
423 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
))
424 if ((nbr
= rn
->info
))
425 if (!IPV4_ADDR_SAME(&nbr
->router_id
,
426 &oi
->ospf
->router_id
))
427 if (nbr
->state
== NSM_Full
) {
428 route_unlock_node(rn
);
432 /* PtoP link must have only 1 neighbor. */
433 if (ospf_nbr_count(oi
, 0) > 1)
435 EC_OSPF_PTP_NEIGHBOR
,
436 "Point-to-Point link on interface %s has more than 1 neighbor.",
442 /* Determine cost of link, taking RFC3137 stub-router support into
445 static uint16_t ospf_link_cost(struct ospf_interface
*oi
)
447 /* RFC3137 stub router support */
448 if (!CHECK_FLAG(oi
->area
->stub_router_state
, OSPF_AREA_IS_STUB_ROUTED
))
449 return oi
->output_cost
;
451 return OSPF_OUTPUT_COST_INFINITE
;
454 /* Set a link information. */
455 char link_info_set(struct stream
**s
, struct in_addr id
, struct in_addr data
,
456 uint8_t type
, uint8_t tos
, uint16_t cost
)
458 /* LSA stream is initially allocated to OSPF_MAX_LSA_SIZE, suits
459 * vast majority of cases. Some rare routers with lots of links need
461 * we try accommodate those here.
463 if (STREAM_WRITEABLE(*s
) < OSPF_ROUTER_LSA_LINK_SIZE
) {
464 size_t ret
= OSPF_MAX_LSA_SIZE
;
466 /* Can we enlarge the stream still? */
467 if (STREAM_SIZE(*s
) == OSPF_MAX_LSA_SIZE
) {
468 /* we futz the size here for simplicity, really we need
471 * IP Header - (sizeof(struct ip))
472 * OSPF Header - OSPF_HEADER_SIZE
473 * LSA Header - OSPF_LSA_HEADER_SIZE
474 * MD5 auth data, if MD5 is configured -
475 * OSPF_AUTH_MD5_SIZE.
477 * Simpler just to subtract OSPF_MAX_LSA_SIZE though.
479 ret
= stream_resize_inplace(
480 s
, OSPF_MAX_PACKET_SIZE
- OSPF_MAX_LSA_SIZE
);
483 if (ret
== OSPF_MAX_LSA_SIZE
) {
486 "%s: Out of space in LSA stream, left %zd, size %zd",
487 __func__
, STREAM_WRITEABLE(*s
),
493 /* TOS based routing is not supported. */
494 stream_put_ipv4(*s
, id
.s_addr
); /* Link ID. */
495 stream_put_ipv4(*s
, data
.s_addr
); /* Link Data. */
496 stream_putc(*s
, type
); /* Link Type. */
497 stream_putc(*s
, tos
); /* TOS = 0. */
498 stream_putw(*s
, cost
); /* Link Cost. */
503 /* Describe Point-to-Point link (Section 12.4.1.1). */
505 /* Note: If the interface is configured as point-to-point dmvpn then the other
506 * end of link is dmvpn hub with point-to-multipoint ospf network type. The
507 * hub then expects this router to populate the stub network and also Link Data
508 * Field set to IP Address and not MIB-II ifIndex
510 static int lsa_link_ptop_set(struct stream
**s
, struct ospf_interface
*oi
)
513 struct ospf_neighbor
*nbr
;
514 struct in_addr id
, mask
, data
;
515 uint16_t cost
= ospf_link_cost(oi
);
517 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
518 zlog_debug("LSA[Type1]: Set link Point-to-Point");
520 if ((nbr
= ospf_nbr_lookup_ptop(oi
)))
521 if (nbr
->state
== NSM_Full
) {
522 if (CHECK_FLAG(oi
->connected
->flags
,
523 ZEBRA_IFA_UNNUMBERED
)
525 /* For unnumbered point-to-point networks, the
527 should specify the interface's MIB-II ifIndex
529 data
.s_addr
= htonl(oi
->ifp
->ifindex
);
530 links
+= link_info_set(
531 s
, nbr
->router_id
, data
,
532 LSA_LINK_TYPE_POINTOPOINT
, 0, cost
);
534 links
+= link_info_set(
536 oi
->address
->u
.prefix4
,
537 LSA_LINK_TYPE_POINTOPOINT
, 0, cost
);
541 /* no need for a stub link for unnumbered interfaces */
543 || !CHECK_FLAG(oi
->connected
->flags
, ZEBRA_IFA_UNNUMBERED
)) {
544 /* Regardless of the state of the neighboring router, we must
545 add a Type 3 link (stub network).
546 N.B. Options 1 & 2 share basically the same logic. */
547 masklen2ip(oi
->address
->prefixlen
, &mask
);
548 id
.s_addr
= CONNECTED_PREFIX(oi
->connected
)->u
.prefix4
.s_addr
550 links
+= link_info_set(s
, id
, mask
, LSA_LINK_TYPE_STUB
, 0,
557 /* Describe Broadcast Link. */
558 static int lsa_link_broadcast_set(struct stream
**s
, struct ospf_interface
*oi
)
560 struct ospf_neighbor
*dr
;
561 struct in_addr id
, mask
;
562 uint16_t cost
= ospf_link_cost(oi
);
564 /* Describe Type 3 Link. */
565 if (oi
->state
== ISM_Waiting
) {
566 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
568 "LSA[Type1]: Interface %s is in state Waiting. Adding stub interface",
570 masklen2ip(oi
->address
->prefixlen
, &mask
);
571 id
.s_addr
= oi
->address
->u
.prefix4
.s_addr
& mask
.s_addr
;
572 return link_info_set(s
, id
, mask
, LSA_LINK_TYPE_STUB
, 0,
576 dr
= ospf_nbr_lookup_by_addr(oi
->nbrs
, &DR(oi
));
577 /* Describe Type 2 link. */
578 if (dr
&& (dr
->state
== NSM_Full
579 || IPV4_ADDR_SAME(&oi
->address
->u
.prefix4
, &DR(oi
)))
580 && ospf_nbr_count(oi
, NSM_Full
) > 0) {
581 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
583 "LSA[Type1]: Interface %s has a DR. Adding transit interface",
585 return link_info_set(s
, DR(oi
), oi
->address
->u
.prefix4
,
586 LSA_LINK_TYPE_TRANSIT
, 0, cost
);
588 /* Describe type 3 link. */
590 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
592 "LSA[Type1]: Interface %s has no DR. Adding stub interface",
594 masklen2ip(oi
->address
->prefixlen
, &mask
);
595 id
.s_addr
= oi
->address
->u
.prefix4
.s_addr
& mask
.s_addr
;
596 return link_info_set(s
, id
, mask
, LSA_LINK_TYPE_STUB
, 0,
601 static int lsa_link_loopback_set(struct stream
**s
, struct ospf_interface
*oi
)
603 struct in_addr id
, mask
;
605 /* Describe Type 3 Link. */
606 if (oi
->state
!= ISM_Loopback
)
609 mask
.s_addr
= 0xffffffff;
610 id
.s_addr
= oi
->address
->u
.prefix4
.s_addr
;
611 return link_info_set(s
, id
, mask
, LSA_LINK_TYPE_STUB
, 0, 0);
614 /* Describe Virtual Link. */
615 static int lsa_link_virtuallink_set(struct stream
**s
,
616 struct ospf_interface
*oi
)
618 struct ospf_neighbor
*nbr
;
619 uint16_t cost
= ospf_link_cost(oi
);
621 if (oi
->state
== ISM_PointToPoint
)
622 if ((nbr
= ospf_nbr_lookup_ptop(oi
)))
623 if (nbr
->state
== NSM_Full
) {
624 return link_info_set(s
, nbr
->router_id
,
625 oi
->address
->u
.prefix4
,
626 LSA_LINK_TYPE_VIRTUALLINK
,
633 #define lsa_link_nbma_set(S,O) lsa_link_broadcast_set (S, O)
635 /* this function add for support point-to-multipoint ,see rfc2328
637 /* from "edward rrr" <edward_rrr@hotmail.com>
638 http://marc.theaimsgroup.com/?l=zebra&m=100739222210507&w=2 */
639 static int lsa_link_ptomp_set(struct stream
**s
, struct ospf_interface
*oi
)
642 struct route_node
*rn
;
643 struct ospf_neighbor
*nbr
= NULL
;
644 struct in_addr id
, mask
;
645 uint16_t cost
= ospf_link_cost(oi
);
647 mask
.s_addr
= 0xffffffff;
648 id
.s_addr
= oi
->address
->u
.prefix4
.s_addr
;
649 links
+= link_info_set(s
, id
, mask
, LSA_LINK_TYPE_STUB
, 0, 0);
651 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
652 zlog_debug("PointToMultipoint: running ptomultip_set");
654 /* Search neighbor, */
655 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
))
656 if ((nbr
= rn
->info
) != NULL
)
658 if (!IPV4_ADDR_SAME(&nbr
->router_id
,
659 &oi
->ospf
->router_id
))
660 if (nbr
->state
== NSM_Full
)
663 links
+= link_info_set(
665 oi
->address
->u
.prefix4
,
666 LSA_LINK_TYPE_POINTOPOINT
, 0,
668 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
670 "PointToMultipoint: set link to %pI4",
671 &oi
->address
->u
.prefix4
);
677 /* Set router-LSA link information. */
678 static int router_lsa_link_set(struct stream
**s
, struct ospf_area
*area
)
680 struct listnode
*node
;
681 struct ospf_interface
*oi
;
684 for (ALL_LIST_ELEMENTS_RO(area
->oiflist
, node
, oi
)) {
685 struct interface
*ifp
= oi
->ifp
;
687 /* Check interface is up, OSPF is enable. */
688 if (if_is_operative(ifp
)) {
689 if (oi
->state
!= ISM_Down
) {
690 oi
->lsa_pos_beg
= links
;
691 /* Describe each link. */
693 case OSPF_IFTYPE_POINTOPOINT
:
694 links
+= lsa_link_ptop_set(s
, oi
);
696 case OSPF_IFTYPE_BROADCAST
:
697 links
+= lsa_link_broadcast_set(s
, oi
);
699 case OSPF_IFTYPE_NBMA
:
700 links
+= lsa_link_nbma_set(s
, oi
);
702 case OSPF_IFTYPE_POINTOMULTIPOINT
:
703 links
+= lsa_link_ptomp_set(s
, oi
);
705 case OSPF_IFTYPE_VIRTUALLINK
:
707 lsa_link_virtuallink_set(s
, oi
);
709 case OSPF_IFTYPE_LOOPBACK
:
710 links
+= lsa_link_loopback_set(s
, oi
);
712 oi
->lsa_pos_end
= links
;
720 /* Set router-LSA body. */
721 void ospf_router_lsa_body_set(struct stream
**s
, struct ospf_area
*area
)
727 stream_putc(*s
, router_lsa_flags(area
));
729 /* Set Zero fields. */
732 /* Keep pointer to # links. */
733 putp
= stream_get_endp(*s
);
738 /* Set all link information. */
739 cnt
= router_lsa_link_set(s
, area
);
741 /* Set # of links here. */
742 stream_putw_at(*s
, putp
, cnt
);
745 static void ospf_stub_router_timer(struct event
*t
)
747 struct ospf_area
*area
= EVENT_ARG(t
);
749 area
->t_stub_router
= NULL
;
751 SET_FLAG(area
->stub_router_state
, OSPF_AREA_WAS_START_STUB_ROUTED
);
753 /* clear stub route state and generate router-lsa refresh, don't
754 * clobber an administratively set stub-router state though.
756 if (CHECK_FLAG(area
->stub_router_state
, OSPF_AREA_ADMIN_STUB_ROUTED
))
759 UNSET_FLAG(area
->stub_router_state
, OSPF_AREA_IS_STUB_ROUTED
);
761 ospf_router_lsa_update_area(area
);
764 static void ospf_stub_router_check(struct ospf_area
*area
)
766 /* area must either be administratively configured to be stub
767 * or startup-time stub-router must be configured and we must in a
771 if (CHECK_FLAG(area
->stub_router_state
, OSPF_AREA_ADMIN_STUB_ROUTED
)) {
772 SET_FLAG(area
->stub_router_state
, OSPF_AREA_IS_STUB_ROUTED
);
776 /* not admin-stubbed, check whether startup stubbing is configured and
777 * whether it's not been done yet
779 if (CHECK_FLAG(area
->stub_router_state
,
780 OSPF_AREA_WAS_START_STUB_ROUTED
))
783 if (area
->ospf
->stub_router_startup_time
784 == OSPF_STUB_ROUTER_UNCONFIGURED
) {
785 /* stub-router is hence done forever for this area, even if
787 * tries configure it (take effect next restart).
789 SET_FLAG(area
->stub_router_state
,
790 OSPF_AREA_WAS_START_STUB_ROUTED
);
794 /* startup stub-router configured and not yet done */
795 SET_FLAG(area
->stub_router_state
, OSPF_AREA_IS_STUB_ROUTED
);
797 OSPF_AREA_TIMER_ON(area
->t_stub_router
, ospf_stub_router_timer
,
798 area
->ospf
->stub_router_startup_time
);
801 /* Create new router-LSA. */
802 static struct ospf_lsa
*ospf_router_lsa_new(struct ospf_area
*area
)
804 struct ospf
*ospf
= area
->ospf
;
806 struct lsa_header
*lsah
;
807 struct ospf_lsa
*new;
810 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
811 zlog_debug("LSA[Type1]: Create router-LSA instance");
813 /* check whether stub-router is desired, and if this is the first
816 ospf_stub_router_check(area
);
818 /* Create a stream for LSA. */
819 s
= stream_new(OSPF_MAX_LSA_SIZE
);
820 /* Set LSA common header fields. */
821 lsa_header_set(s
, LSA_OPTIONS_GET(area
) | LSA_OPTIONS_NSSA_GET(area
),
822 OSPF_ROUTER_LSA
, ospf
->router_id
, ospf
->router_id
);
824 /* Set router-LSA body fields. */
825 ospf_router_lsa_body_set(&s
, area
);
828 length
= stream_get_endp(s
);
829 lsah
= (struct lsa_header
*)STREAM_DATA(s
);
830 lsah
->length
= htons(length
);
832 /* Now, create OSPF LSA instance. */
833 new = ospf_lsa_new_and_data(length
);
836 SET_FLAG(new->flags
, OSPF_LSA_SELF
| OSPF_LSA_SELF_CHECKED
);
837 new->vrf_id
= area
->ospf
->vrf_id
;
839 /* Copy LSA data to store, discard stream. */
840 memcpy(new->data
, lsah
, length
);
846 /* Originate Router-LSA. */
847 static struct ospf_lsa
*ospf_router_lsa_originate(struct ospf_area
*area
)
849 struct ospf_lsa
*new;
851 if (area
->ospf
->gr_info
.restart_in_progress
) {
852 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
854 "LSA[Type%d]: Graceful Restart in progress, don't originate",
859 /* Create new router-LSA instance. */
860 if ((new = ospf_router_lsa_new(area
)) == NULL
) {
861 zlog_err("%s: ospf_router_lsa_new returned NULL", __func__
);
866 if (new->data
->adv_router
.s_addr
== INADDR_ANY
) {
867 if (IS_DEBUG_OSPF_EVENT
)
868 zlog_debug("LSA[Type1]: AdvRouter is 0, discard");
869 ospf_lsa_discard(new);
873 /* Install LSA to LSDB. */
874 new = ospf_lsa_install(area
->ospf
, NULL
, new);
876 /* Update LSA origination count. */
877 area
->ospf
->lsa_originate_count
++;
879 /* Flooding new LSA through area. */
880 ospf_flood_through_area(area
, NULL
, new);
882 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
)) {
883 zlog_debug("LSA[Type%d:%pI4]: Originate router-LSA %p",
884 new->data
->type
, &new->data
->id
,
886 ospf_lsa_header_dump(new->data
);
892 /* Refresh router-LSA. */
893 static struct ospf_lsa
*ospf_router_lsa_refresh(struct ospf_lsa
*lsa
)
895 struct ospf_area
*area
= lsa
->area
;
896 struct ospf_lsa
*new;
901 /* Delete LSA from neighbor retransmit-list. */
902 ospf_ls_retransmit_delete_nbr_area(area
, lsa
);
904 /* Unregister LSA from refresh-list */
905 ospf_refresher_unregister_lsa(area
->ospf
, lsa
);
907 /* Create new router-LSA instance. */
908 if ((new = ospf_router_lsa_new(area
)) == NULL
) {
909 zlog_err("%s: ospf_router_lsa_new returned NULL", __func__
);
913 new->data
->ls_seqnum
= lsa_seqnum_increment(lsa
);
915 ospf_lsa_install(area
->ospf
, NULL
, new);
917 /* Flood LSA through area. */
918 ospf_flood_through_area(area
, NULL
, new);
921 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
)) {
922 zlog_debug("LSA[Type%d:%pI4]: router-LSA refresh",
923 new->data
->type
, &new->data
->id
);
924 ospf_lsa_header_dump(new->data
);
930 int ospf_router_lsa_update_area(struct ospf_area
*area
)
932 if (IS_DEBUG_OSPF_EVENT
)
933 zlog_debug("[router-LSA]: (router-LSA area update)");
935 /* Now refresh router-LSA. */
936 if (area
->router_lsa_self
)
937 ospf_lsa_refresh(area
->ospf
, area
->router_lsa_self
);
938 /* Newly originate router-LSA. */
940 ospf_router_lsa_originate(area
);
945 int ospf_router_lsa_update(struct ospf
*ospf
)
947 struct listnode
*node
, *nnode
;
948 struct ospf_area
*area
;
950 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
951 zlog_debug("Timer[router-LSA Update]: (timer expire)");
953 for (ALL_LIST_ELEMENTS(ospf
->areas
, node
, nnode
, area
)) {
954 struct ospf_lsa
*lsa
= area
->router_lsa_self
;
955 struct router_lsa
*rl
;
956 const char *area_str
;
958 /* Keep Area ID string. */
959 area_str
= AREA_NAME(area
);
961 /* If LSA not exist in this Area, originate new. */
963 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
965 "LSA[Type1]: Create router-LSA for Area %s",
968 ospf_router_lsa_originate(area
);
970 /* If router-ID is changed, Link ID must change.
971 First flush old LSA, then originate new. */
972 else if (!IPV4_ADDR_SAME(&lsa
->data
->id
, &ospf
->router_id
)) {
973 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
975 "LSA[Type%d:%pI4]: Refresh router-LSA for Area %s",
977 &lsa
->data
->id
, area_str
);
978 ospf_refresher_unregister_lsa(ospf
, lsa
);
979 ospf_lsa_flush_area(lsa
, area
);
980 ospf_lsa_unlock(&area
->router_lsa_self
);
981 area
->router_lsa_self
= NULL
;
983 /* Refresh router-LSA, (not install) and flood through
985 ospf_router_lsa_update_area(area
);
987 rl
= (struct router_lsa
*)lsa
->data
;
988 /* Refresh router-LSA, (not install) and flood through
990 if (rl
->flags
!= ospf
->flags
)
991 ospf_router_lsa_update_area(area
);
999 /* network-LSA related functions. */
1000 /* Originate Network-LSA. */
1001 static void ospf_network_lsa_body_set(struct stream
*s
,
1002 struct ospf_interface
*oi
)
1004 struct in_addr mask
;
1005 struct route_node
*rn
;
1006 struct ospf_neighbor
*nbr
;
1008 masklen2ip(oi
->address
->prefixlen
, &mask
);
1009 stream_put_ipv4(s
, mask
.s_addr
);
1011 /* The network-LSA lists those routers that are fully adjacent to
1012 the Designated Router; each fully adjacent router is identified by
1013 its OSPF Router ID. The Designated Router includes itself in this
1014 list. RFC2328, Section 12.4.2 */
1016 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
))
1017 if ((nbr
= rn
->info
) != NULL
)
1018 if (nbr
->state
== NSM_Full
|| nbr
== oi
->nbr_self
)
1019 stream_put_ipv4(s
, nbr
->router_id
.s_addr
);
1022 static struct ospf_lsa
*ospf_network_lsa_new(struct ospf_interface
*oi
)
1025 struct ospf_lsa
*new;
1026 struct lsa_header
*lsah
;
1027 struct ospf_if_params
*oip
;
1030 /* If there are no neighbours on this network (the net is stub),
1031 the router does not originate network-LSA (see RFC 12.4.2) */
1032 if (oi
->full_nbrs
== 0)
1035 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
1036 zlog_debug("LSA[Type2]: Create network-LSA instance");
1038 /* Create new stream for LSA. */
1039 s
= stream_new(OSPF_MAX_LSA_SIZE
);
1040 lsah
= (struct lsa_header
*)STREAM_DATA(s
);
1042 lsa_header_set(s
, (OPTIONS(oi
) | LSA_OPTIONS_GET(oi
->area
)),
1043 OSPF_NETWORK_LSA
, DR(oi
), oi
->ospf
->router_id
);
1045 /* Set network-LSA body fields. */
1046 ospf_network_lsa_body_set(s
, oi
);
1049 length
= stream_get_endp(s
);
1050 lsah
->length
= htons(length
);
1052 /* Create OSPF LSA instance. */
1053 new = ospf_lsa_new_and_data(length
);
1055 new->area
= oi
->area
;
1056 SET_FLAG(new->flags
, OSPF_LSA_SELF
| OSPF_LSA_SELF_CHECKED
);
1057 new->vrf_id
= oi
->ospf
->vrf_id
;
1059 /* Copy LSA to store. */
1060 memcpy(new->data
, lsah
, length
);
1063 /* Remember prior network LSA sequence numbers, even if we stop
1064 * originating one for this oi, to try avoid re-originating LSAs with a
1065 * prior sequence number, and thus speed up adjency forming &
1068 if ((oip
= ospf_lookup_if_params(oi
->ifp
, oi
->address
->u
.prefix4
))) {
1069 new->data
->ls_seqnum
= oip
->network_lsa_seqnum
;
1070 new->data
->ls_seqnum
= lsa_seqnum_increment(new);
1072 oip
= ospf_get_if_params(oi
->ifp
, oi
->address
->u
.prefix4
);
1073 ospf_if_update_params(oi
->ifp
, oi
->address
->u
.prefix4
);
1075 oip
->network_lsa_seqnum
= new->data
->ls_seqnum
;
1080 /* Originate network-LSA. */
1081 void ospf_network_lsa_update(struct ospf_interface
*oi
)
1083 struct ospf_lsa
*new;
1085 if (oi
->area
->ospf
->gr_info
.restart_in_progress
) {
1086 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
1088 "LSA[Type%d]: Graceful Restart in progress, don't originate",
1093 if (oi
->network_lsa_self
!= NULL
) {
1094 ospf_lsa_refresh(oi
->ospf
, oi
->network_lsa_self
);
1098 /* Create new network-LSA instance. */
1099 new = ospf_network_lsa_new(oi
);
1103 /* Install LSA to LSDB. */
1104 new = ospf_lsa_install(oi
->ospf
, oi
, new);
1106 /* Update LSA origination count. */
1107 oi
->ospf
->lsa_originate_count
++;
1109 /* Flooding new LSA through area. */
1110 ospf_flood_through_area(oi
->area
, NULL
, new);
1112 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
)) {
1113 zlog_debug("LSA[Type%d:%pI4]: Originate network-LSA %p",
1114 new->data
->type
, &new->data
->id
,
1116 ospf_lsa_header_dump(new->data
);
1122 static struct ospf_lsa
*ospf_network_lsa_refresh(struct ospf_lsa
*lsa
)
1124 struct ospf_area
*area
= lsa
->area
;
1125 struct ospf_lsa
*new, *new2
;
1126 struct ospf_if_params
*oip
;
1127 struct ospf_interface
*oi
;
1131 /* Retrieve the oi for the network LSA */
1132 oi
= ospf_if_lookup_by_local_addr(area
->ospf
, NULL
, lsa
->data
->id
);
1134 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
)) {
1136 "LSA[Type%d:%pI4]: network-LSA refresh: no oi found, ick, ignoring.",
1137 lsa
->data
->type
, &lsa
->data
->id
);
1138 ospf_lsa_header_dump(lsa
->data
);
1143 if (oi
->state
!= ISM_DR
)
1146 /* Delete LSA from neighbor retransmit-list. */
1147 ospf_ls_retransmit_delete_nbr_area(area
, lsa
);
1149 /* Unregister LSA from refresh-list */
1150 ospf_refresher_unregister_lsa(area
->ospf
, lsa
);
1152 /* Create new network-LSA instance. */
1153 new = ospf_network_lsa_new(oi
);
1157 oip
= ospf_lookup_if_params(oi
->ifp
, oi
->address
->u
.prefix4
);
1158 assert(oip
!= NULL
);
1159 oip
->network_lsa_seqnum
= new->data
->ls_seqnum
=
1160 lsa_seqnum_increment(lsa
);
1162 new2
= ospf_lsa_install(area
->ospf
, oi
, new);
1164 assert(new2
== new);
1166 /* Flood LSA through aera. */
1167 ospf_flood_through_area(area
, NULL
, new);
1169 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
)) {
1170 zlog_debug("LSA[Type%d:%pI4]: network-LSA refresh",
1171 new->data
->type
, &new->data
->id
);
1172 ospf_lsa_header_dump(new->data
);
1178 static void stream_put_ospf_metric(struct stream
*s
, uint32_t metric_value
)
1183 /* Put 0 metric. TOS metric is not supported. */
1184 metric
= htonl(metric_value
);
1185 mp
= (char *)&metric
;
1187 stream_put(s
, mp
, 3);
1190 /* summary-LSA related functions. */
1191 static void ospf_summary_lsa_body_set(struct stream
*s
, struct prefix
*p
,
1194 struct in_addr mask
;
1196 masklen2ip(p
->prefixlen
, &mask
);
1198 /* Put Network Mask. */
1199 stream_put_ipv4(s
, mask
.s_addr
);
1202 stream_putc(s
, (uint8_t)0);
1205 stream_put_ospf_metric(s
, metric
);
1208 static struct ospf_lsa
*ospf_summary_lsa_new(struct ospf_area
*area
,
1209 struct prefix
*p
, uint32_t metric
,
1213 struct ospf_lsa
*new;
1214 struct lsa_header
*lsah
;
1217 if (id
.s_addr
== 0xffffffff) {
1218 /* Maybe Link State ID not available. */
1219 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
1221 "LSA[Type%d]: Link ID not available, can't originate",
1226 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
1227 zlog_debug("LSA[Type3]: Create summary-LSA instance");
1229 /* Create new stream for LSA. */
1230 s
= stream_new(OSPF_MAX_LSA_SIZE
);
1231 lsah
= (struct lsa_header
*)STREAM_DATA(s
);
1233 lsa_header_set(s
, LSA_OPTIONS_GET(area
), OSPF_SUMMARY_LSA
, id
,
1234 area
->ospf
->router_id
);
1236 /* Set summary-LSA body fields. */
1237 ospf_summary_lsa_body_set(s
, p
, metric
);
1240 length
= stream_get_endp(s
);
1241 lsah
->length
= htons(length
);
1243 /* Create OSPF LSA instance. */
1244 new = ospf_lsa_new_and_data(length
);
1246 SET_FLAG(new->flags
, OSPF_LSA_SELF
| OSPF_LSA_SELF_CHECKED
);
1247 new->vrf_id
= area
->ospf
->vrf_id
;
1249 /* Copy LSA to store. */
1250 memcpy(new->data
, lsah
, length
);
1256 /* Originate Summary-LSA. */
1257 static struct ospf_lsa
*
1258 ospf_summary_lsa_prepare_and_flood(struct prefix_ipv4
*p
, uint32_t metric
,
1259 struct ospf_area
*area
, struct in_addr id
)
1261 struct ospf_lsa
*new;
1263 /* Create new summary-LSA instance. */
1264 if (!(new = ospf_summary_lsa_new(area
, (struct prefix
*)p
, metric
, id
)))
1267 /* Instlal LSA to LSDB. */
1268 new = ospf_lsa_install(area
->ospf
, NULL
, new);
1270 /* Update LSA origination count. */
1271 area
->ospf
->lsa_originate_count
++;
1273 /* Flooding new LSA through area. */
1274 ospf_flood_through_area(area
, NULL
, new);
1276 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
)) {
1277 zlog_debug("LSA[Type%d:%pI4]: Originate summary-LSA %p",
1278 new->data
->type
, &new->data
->id
,
1280 ospf_lsa_header_dump(new->data
);
1286 static struct ospf_lsa
*ospf_handle_summarylsa_lsId_chg(struct ospf_area
*area
,
1287 struct prefix_ipv4
*p
,
1290 struct in_addr old_id
)
1292 struct ospf_lsa
*lsa
= NULL
;
1293 struct ospf_lsa
*summary_lsa
= NULL
;
1294 struct summary_lsa
*sl
= NULL
;
1295 struct ospf_area
*old_area
= NULL
;
1296 struct ospf
*ospf
= area
->ospf
;
1297 struct prefix_ipv4 old_prefix
;
1298 uint32_t old_metric
;
1299 struct in_addr mask
;
1300 uint32_t metric_val
;
1303 lsa
= ospf_lsdb_lookup_by_id(area
->lsdb
, type
, p
->prefix
,
1307 flog_warn(EC_OSPF_LSA_NULL
, "(%s): LSA not found", __func__
);
1311 sl
= (struct summary_lsa
*)lsa
->data
;
1313 old_area
= lsa
->area
;
1314 old_metric
= GET_METRIC(sl
->metric
);
1315 old_prefix
.prefix
= sl
->header
.id
;
1316 old_prefix
.prefixlen
= ip_masklen(sl
->mask
);
1317 old_prefix
.family
= AF_INET
;
1320 /* change the mask */
1321 masklen2ip(p
->prefixlen
, &mask
);
1322 sl
->mask
.s_addr
= mask
.s_addr
;
1324 /* Copy the metric*/
1325 metric_val
= htonl(metric
);
1326 metric_buf
= (char *)&metric_val
;
1327 memcpy(sl
->metric
, metric_buf
, sizeof(metric_val
));
1329 if (type
== OSPF_SUMMARY_LSA
) {
1330 /*Refresh the LSA with new LSA*/
1331 summary_lsa
= ospf_summary_lsa_refresh(ospf
, lsa
);
1333 ospf_summary_lsa_prepare_and_flood(&old_prefix
, old_metric
,
1336 /*Refresh the LSA with new LSA*/
1337 summary_lsa
= ospf_summary_asbr_lsa_refresh(ospf
, lsa
);
1339 ospf_asbr_summary_lsa_prepare_and_flood(&old_prefix
, old_metric
,
1346 /* Originate Summary-LSA. */
1347 struct ospf_lsa
*ospf_summary_lsa_originate(struct prefix_ipv4
*p
,
1349 struct ospf_area
*area
)
1352 enum lsid_status status
;
1353 struct ospf_lsa
*new = NULL
;
1355 status
= ospf_lsa_unique_id(area
->ospf
, area
->lsdb
, OSPF_SUMMARY_LSA
, p
,
1358 if (status
== LSID_CHANGE
) {
1359 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
1360 zlog_debug("Link ID has to be changed.");
1362 new = ospf_handle_summarylsa_lsId_chg(area
, p
, OSPF_SUMMARY_LSA
,
1365 } else if (status
== LSID_NOT_AVAILABLE
) {
1366 /* Link State ID not available. */
1367 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
1369 "LSA[Type5]: Link ID not available, can't originate");
1374 new = ospf_summary_lsa_prepare_and_flood(p
, metric
, area
, id
);
1378 static struct ospf_lsa
*ospf_summary_lsa_refresh(struct ospf
*ospf
,
1379 struct ospf_lsa
*lsa
)
1381 struct ospf_lsa
*new;
1382 struct summary_lsa
*sl
;
1388 sl
= (struct summary_lsa
*)lsa
->data
;
1389 p
.prefixlen
= ip_masklen(sl
->mask
);
1390 new = ospf_summary_lsa_new(lsa
->area
, &p
, GET_METRIC(sl
->metric
),
1396 new->data
->ls_seqnum
= lsa_seqnum_increment(lsa
);
1398 ospf_lsa_install(ospf
, NULL
, new);
1400 /* Flood LSA through AS. */
1401 ospf_flood_through_area(new->area
, NULL
, new);
1403 /* Debug logging. */
1404 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
)) {
1405 zlog_debug("LSA[Type%d:%pI4]: summary-LSA refresh",
1406 new->data
->type
, &new->data
->id
);
1407 ospf_lsa_header_dump(new->data
);
1414 /* summary-ASBR-LSA related functions. */
1415 static void ospf_summary_asbr_lsa_body_set(struct stream
*s
, struct prefix
*p
,
1418 /* Put Network Mask. */
1419 stream_put_ipv4(s
, (uint32_t)0);
1422 stream_putc(s
, (uint8_t)0);
1425 stream_put_ospf_metric(s
, metric
);
1428 static struct ospf_lsa
*ospf_summary_asbr_lsa_new(struct ospf_area
*area
,
1434 struct ospf_lsa
*new;
1435 struct lsa_header
*lsah
;
1438 if (id
.s_addr
== 0xffffffff) {
1439 /* Maybe Link State ID not available. */
1440 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
1442 "LSA[Type%d]: Link ID not available, can't originate",
1443 OSPF_ASBR_SUMMARY_LSA
);
1447 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
1448 zlog_debug("LSA[Type3]: Create summary-LSA instance");
1450 /* Create new stream for LSA. */
1451 s
= stream_new(OSPF_MAX_LSA_SIZE
);
1452 lsah
= (struct lsa_header
*)STREAM_DATA(s
);
1454 lsa_header_set(s
, LSA_OPTIONS_GET(area
), OSPF_ASBR_SUMMARY_LSA
, id
,
1455 area
->ospf
->router_id
);
1457 /* Set summary-LSA body fields. */
1458 ospf_summary_asbr_lsa_body_set(s
, p
, metric
);
1461 length
= stream_get_endp(s
);
1462 lsah
->length
= htons(length
);
1464 /* Create OSPF LSA instance. */
1465 new = ospf_lsa_new_and_data(length
);
1467 SET_FLAG(new->flags
, OSPF_LSA_SELF
| OSPF_LSA_SELF_CHECKED
);
1468 new->vrf_id
= area
->ospf
->vrf_id
;
1470 /* Copy LSA to store. */
1471 memcpy(new->data
, lsah
, length
);
1477 /* Originate summary-ASBR-LSA. */
1478 static struct ospf_lsa
*
1479 ospf_asbr_summary_lsa_prepare_and_flood(struct prefix_ipv4
*p
, uint32_t metric
,
1480 struct ospf_area
*area
,
1483 struct ospf_lsa
*new;
1485 /* Create new summary-LSA instance. */
1486 new = ospf_summary_asbr_lsa_new(area
, (struct prefix
*)p
, metric
, id
);
1490 /* Install LSA to LSDB. */
1491 new = ospf_lsa_install(area
->ospf
, NULL
, new);
1493 /* Update LSA origination count. */
1494 area
->ospf
->lsa_originate_count
++;
1496 /* Flooding new LSA through area. */
1497 ospf_flood_through_area(area
, NULL
, new);
1499 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
)) {
1500 zlog_debug("LSA[Type%d:%pI4]: Originate summary-ASBR-LSA %p",
1501 new->data
->type
, &new->data
->id
,
1503 ospf_lsa_header_dump(new->data
);
1509 struct ospf_lsa
*ospf_summary_asbr_lsa_originate(struct prefix_ipv4
*p
,
1511 struct ospf_area
*area
)
1513 struct ospf_lsa
*new;
1515 enum lsid_status status
;
1517 status
= ospf_lsa_unique_id(area
->ospf
, area
->lsdb
,
1518 OSPF_ASBR_SUMMARY_LSA
, p
, &id
);
1520 if (status
== LSID_CHANGE
) {
1521 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
1522 zlog_debug("Link ID has to be changed.");
1524 new = ospf_handle_summarylsa_lsId_chg(
1525 area
, p
, OSPF_ASBR_SUMMARY_LSA
, metric
, id
);
1527 } else if (status
== LSID_NOT_AVAILABLE
) {
1528 /* Link State ID not available. */
1529 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
1531 "LSA[Type5]: Link ID not available, can't originate");
1536 new = ospf_asbr_summary_lsa_prepare_and_flood(p
, metric
, area
, id
);
1540 static struct ospf_lsa
*ospf_summary_asbr_lsa_refresh(struct ospf
*ospf
,
1541 struct ospf_lsa
*lsa
)
1543 struct ospf_lsa
*new;
1544 struct summary_lsa
*sl
;
1546 bool ind_lsa
= false;
1551 if (lsa
->area
->fr_info
.indication_lsa_self
&&
1552 (lsa
->area
->fr_info
.indication_lsa_self
== lsa
))
1555 sl
= (struct summary_lsa
*)lsa
->data
;
1556 p
.prefixlen
= ip_masklen(sl
->mask
);
1557 new = ospf_summary_asbr_lsa_new(lsa
->area
, &p
, GET_METRIC(sl
->metric
),
1562 new->data
->ls_seqnum
= lsa_seqnum_increment(lsa
);
1564 ospf_lsa_install(ospf
, NULL
, new);
1566 /* Flood LSA through area. */
1567 ospf_flood_through_area(new->area
, NULL
, new);
1570 new->area
->fr_info
.indication_lsa_self
= new;
1572 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
)) {
1573 zlog_debug("LSA[Type%d:%pI4]: summary-ASBR-LSA refresh",
1574 new->data
->type
, &new->data
->id
);
1575 ospf_lsa_header_dump(new->data
);
1581 /* AS-external-LSA related functions. */
1583 /* Get nexthop for AS-external-LSAs. Return nexthop if its interface
1584 is connected, else 0*/
1585 static struct in_addr
ospf_external_lsa_nexthop_get(struct ospf
*ospf
,
1586 struct in_addr nexthop
)
1590 struct listnode
*node
;
1591 struct ospf_interface
*oi
;
1595 if (!nexthop
.s_addr
)
1598 /* Check whether nexthop is covered by OSPF network. */
1599 nh
.family
= AF_INET
;
1600 nh
.u
.prefix4
= nexthop
;
1601 nh
.prefixlen
= IPV4_MAX_BITLEN
;
1603 /* XXX/SCALE: If there were a lot of oi's on an ifp, then it'd be
1604 * better to make use of the per-ifp table of ois.
1606 for (ALL_LIST_ELEMENTS_RO(ospf
->oiflist
, node
, oi
))
1607 if (if_is_operative(oi
->ifp
))
1608 if (oi
->address
->family
== AF_INET
)
1609 if (prefix_match(oi
->address
, &nh
))
1615 /* NSSA-external-LSA related functions. */
1617 /* Get 1st IP connection for Forward Addr */
1619 struct in_addr
ospf_get_ip_from_ifp(struct ospf_interface
*oi
)
1623 fwd
.s_addr
= INADDR_ANY
;
1625 if (if_is_operative(oi
->ifp
))
1626 return oi
->address
->u
.prefix4
;
1631 /* Get 1st IP connection for Forward Addr */
1632 struct in_addr
ospf_get_nssa_ip(struct ospf_area
*area
)
1635 struct in_addr best_default
;
1636 struct listnode
*node
;
1637 struct ospf_interface
*oi
;
1640 best_default
.s_addr
= 0;
1642 for (ALL_LIST_ELEMENTS_RO(area
->ospf
->oiflist
, node
, oi
)) {
1643 if (if_is_operative(oi
->ifp
))
1644 if (oi
->area
->external_routing
== OSPF_AREA_NSSA
)
1646 && oi
->address
->family
== AF_INET
) {
1647 if (best_default
.s_addr
== INADDR_ANY
)
1649 oi
->address
->u
.prefix4
;
1650 if (oi
->area
== area
)
1651 return oi
->address
->u
.prefix4
;
1654 if (best_default
.s_addr
!= INADDR_ANY
)
1655 return best_default
;
1657 if (best_default
.s_addr
!= INADDR_ANY
)
1658 return best_default
;
1663 int metric_type(struct ospf
*ospf
, uint8_t src
, unsigned short instance
)
1665 struct ospf_redist
*red
;
1667 red
= ospf_redist_lookup(ospf
, src
, instance
);
1669 return ((!red
|| red
->dmetric
.type
< 0) ? DEFAULT_METRIC_TYPE
1670 : red
->dmetric
.type
);
1673 int metric_value(struct ospf
*ospf
, uint8_t src
, unsigned short instance
)
1675 struct ospf_redist
*red
;
1677 red
= ospf_redist_lookup(ospf
, src
, instance
);
1678 if (!red
|| red
->dmetric
.value
< 0) {
1679 if (src
== DEFAULT_ROUTE
) {
1680 if (ospf
->default_originate
== DEFAULT_ORIGINATE_ZEBRA
)
1681 return DEFAULT_DEFAULT_ORIGINATE_METRIC
;
1683 return DEFAULT_DEFAULT_ALWAYS_METRIC
;
1684 } else if (ospf
->default_metric
< 0)
1685 return DEFAULT_DEFAULT_METRIC
;
1687 return ospf
->default_metric
;
1690 return red
->dmetric
.value
;
1693 /* Set AS-external-LSA body. */
1694 static void ospf_external_lsa_body_set(struct stream
*s
,
1695 struct external_info
*ei
,
1698 struct prefix_ipv4
*p
= &ei
->p
;
1699 struct in_addr mask
, fwd_addr
;
1703 unsigned short instance
;
1705 /* Put Network Mask. */
1706 masklen2ip(p
->prefixlen
, &mask
);
1707 stream_put_ipv4(s
, mask
.s_addr
);
1709 /* If prefix is default, specify DEFAULT_ROUTE. */
1710 type
= is_default_prefix4(&ei
->p
) ? DEFAULT_ROUTE
: ei
->type
;
1711 instance
= is_default_prefix4(&ei
->p
) ? 0 : ei
->instance
;
1713 mtype
= (ROUTEMAP_METRIC_TYPE(ei
) != -1)
1714 ? ROUTEMAP_METRIC_TYPE(ei
)
1715 : metric_type(ospf
, type
, instance
);
1717 mvalue
= (ROUTEMAP_METRIC(ei
) != -1)
1718 ? ROUTEMAP_METRIC(ei
)
1719 : metric_value(ospf
, type
, instance
);
1721 /* Put type of external metric. */
1722 stream_putc(s
, (mtype
== EXTERNAL_METRIC_TYPE_2
? 0x80 : 0));
1724 /* Put 0 metric. TOS metric is not supported. */
1725 stream_put_ospf_metric(s
, mvalue
);
1727 /* Get forwarding address to nexthop if on the Connection List, else 0.
1729 fwd_addr
= ospf_external_lsa_nexthop_get(ospf
, ei
->nexthop
);
1731 /* Put forwarding address. */
1732 stream_put_ipv4(s
, fwd_addr
.s_addr
);
1735 stream_putl(s
, ei
->tag
);
1738 /* Create new external-LSA. */
1739 static struct ospf_lsa
*
1740 ospf_exnl_lsa_prepare_and_flood(struct ospf
*ospf
, struct external_info
*ei
,
1744 struct lsa_header
*lsah
;
1745 struct ospf_lsa
*new;
1748 /* Create new stream for LSA. */
1749 s
= stream_new(OSPF_MAX_LSA_SIZE
);
1750 lsah
= (struct lsa_header
*)STREAM_DATA(s
);
1752 /* Set LSA common header fields. */
1753 lsa_header_set(s
, OSPF_OPTION_E
, OSPF_AS_EXTERNAL_LSA
, id
,
1756 /* Set AS-external-LSA body fields. */
1757 ospf_external_lsa_body_set(s
, ei
, ospf
);
1760 length
= stream_get_endp(s
);
1761 lsah
->length
= htons(length
);
1763 /* Now, create OSPF LSA instance. */
1764 new = ospf_lsa_new_and_data(length
);
1766 SET_FLAG(new->flags
,
1767 OSPF_LSA_SELF
| OSPF_LSA_APPROVED
| OSPF_LSA_SELF_CHECKED
);
1768 new->vrf_id
= ospf
->vrf_id
;
1770 /* Copy LSA data to store, discard stream. */
1771 memcpy(new->data
, lsah
, length
);
1777 static struct ospf_lsa
*ospf_handle_exnl_lsa_lsId_chg(struct ospf
*ospf
,
1778 struct external_info
*ei
,
1781 struct ospf_lsa
*lsa
;
1782 struct as_external_lsa
*al
;
1783 struct in_addr mask
;
1784 struct ospf_lsa
*new;
1785 struct external_info ei_summary
= {};
1786 struct external_info
*ei_old
;
1788 lsa
= ospf_lsdb_lookup_by_id(ospf
->lsdb
, OSPF_AS_EXTERNAL_LSA
,
1789 ei
->p
.prefix
, ospf
->router_id
);
1792 flog_warn(EC_OSPF_LSA_NULL
, "(%s): LSA not found", __func__
);
1796 ei_old
= ospf_external_info_check(ospf
, lsa
);
1798 al
= (struct as_external_lsa
*)lsa
->data
;
1801 /* eii_old pointer of LSA is NULL, this
1802 * must be external aggregate route.
1804 ei_summary
.p
.family
= AF_INET
;
1805 ei_summary
.p
.prefix
= al
->header
.id
;
1806 ei_summary
.p
.prefixlen
= ip_masklen(al
->mask
);
1807 ei_summary
.tag
= (unsigned long)ntohl(al
->e
[0].route_tag
);
1808 ei_old
= &ei_summary
;
1811 /* change the mask */
1812 masklen2ip(ei
->p
.prefixlen
, &mask
);
1813 al
->mask
.s_addr
= mask
.s_addr
;
1815 /*Refresh the LSA with new LSA*/
1816 ospf_external_lsa_refresh(ospf
, lsa
, ei
, LSA_REFRESH_FORCE
, 0);
1818 /*Originate the old LSA with changed LSID*/
1819 new = ospf_exnl_lsa_prepare_and_flood(ospf
, ei_old
, id
);
1824 static struct ospf_lsa
*ospf_external_lsa_new(struct ospf
*ospf
,
1825 struct external_info
*ei
,
1826 struct in_addr
*old_id
)
1828 struct ospf_lsa
*new;
1830 enum lsid_status status
;
1833 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
1835 "LSA[Type5]: External info is NULL, can't originate");
1839 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
1840 zlog_debug("LSA[Type5]: Originate AS-external-LSA instance");
1842 /* If old Link State ID is specified, refresh LSA with same ID. */
1845 /* Get Link State with unique ID. */
1847 status
= ospf_lsa_unique_id(ospf
, ospf
->lsdb
,
1848 OSPF_AS_EXTERNAL_LSA
, &ei
->p
, &id
);
1850 if (status
== LSID_CHANGE
) {
1851 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
1852 zlog_debug("Link ID has to be changed.");
1854 new = ospf_handle_exnl_lsa_lsId_chg(ospf
, ei
, id
);
1856 } else if (status
== LSID_NOT_AVAILABLE
) {
1857 /* Link State ID not available. */
1858 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
1860 "LSA[Type5]: Link ID not available, can't originate");
1865 new = ospf_exnl_lsa_prepare_and_flood(ospf
, ei
, id
);
1871 static void ospf_install_flood_nssa(struct ospf
*ospf
, struct ospf_lsa
*lsa
,
1872 struct external_info
*ei
)
1874 struct ospf_lsa
*new;
1875 struct as_external_lsa
*extlsa
;
1876 struct ospf_area
*area
;
1877 struct listnode
*node
, *nnode
;
1879 /* LSA may be a Type-5 originated via translation of a Type-7 LSA
1880 * which originated from an NSSA area. In which case it should not be
1881 * flooded back to NSSA areas.
1883 if (CHECK_FLAG(lsa
->flags
, OSPF_LSA_LOCAL_XLT
))
1886 /* NSSA Originate or Refresh (If anyNSSA)
1888 LSA is self-originated. And just installed as Type-5.
1889 Additionally, install as Type-7 LSDB for every attached NSSA.
1891 P-Bit controls which ABR performs translation to outside world; If
1892 we are an ABR....do not set the P-bit, because we send the Type-5,
1893 not as the ABR Translator, but as the ASBR owner within the AS!
1895 If we are NOT ABR, Flood through NSSA as Type-7 w/P-bit set. The
1896 elected ABR Translator will see the P-bit, Translate, and re-flood.
1898 Later, ABR_TASK and P-bit will scan Type-7 LSDB and translate to
1899 Type-5's to non-NSSA Areas. (it will also attempt a re-install) */
1901 for (ALL_LIST_ELEMENTS(ospf
->areas
, node
, nnode
, area
)) {
1902 /* Don't install Type-7 LSA's into nonNSSA area */
1903 if (area
->external_routing
!= OSPF_AREA_NSSA
)
1906 /* make lsa duplicate, lock=1 */
1907 new = ospf_lsa_dup(lsa
);
1909 new->data
->type
= OSPF_AS_NSSA_LSA
;
1911 /* set P-bit if not ABR */
1912 if (!IS_OSPF_ABR(ospf
)) {
1913 SET_FLAG(new->data
->options
, OSPF_OPTION_NP
);
1915 /* set non-zero FWD ADDR
1917 draft-ietf-ospf-nssa-update-09.txt
1919 if the network between the NSSA AS boundary router and
1921 adjacent AS is advertised into OSPF as an internal OSPF
1923 the forwarding address should be the next op address as
1925 currently done with type-5 LSAs. If the intervening
1927 not adversited into OSPF as an internal OSPF route and
1929 type-7 LSA's P-bit is set a forwarding address should be
1930 selected from one of the router's active OSPF interface
1932 which belong to the NSSA. If no such addresses exist,
1934 no type-7 LSA's with the P-bit set should originate from
1938 /* kevinm: not updating lsa anymore, just new */
1939 extlsa
= (struct as_external_lsa
*)(new->data
);
1941 if (extlsa
->e
[0].fwd_addr
.s_addr
== INADDR_ANY
)
1942 extlsa
->e
[0].fwd_addr
= ospf_get_nssa_ip(
1943 area
); /* this NSSA area in ifp */
1945 if (extlsa
->e
[0].fwd_addr
.s_addr
== INADDR_ANY
) {
1946 if (IS_DEBUG_OSPF_NSSA
)
1948 "LSA[Type-7]: Could not build FWD-ADDR");
1949 ospf_lsa_discard(new);
1954 /* install also as Type-7 */
1955 ospf_lsa_install(ospf
, NULL
,
1956 new); /* Remove Old, Lock New = 2 */
1958 /* will send each copy, lock=2+n */
1959 ospf_flood_through_as(
1960 ospf
, NULL
, new); /* all attached NSSA's, no AS/STUBs */
1964 static struct ospf_lsa
*ospf_lsa_translated_nssa_new(struct ospf
*ospf
,
1965 struct ospf_lsa
*type7
)
1968 struct ospf_lsa
*new;
1969 struct as_external_lsa
*ext
, *extnew
;
1970 struct external_info ei
;
1972 ext
= (struct as_external_lsa
*)(type7
->data
);
1974 /* need external_info struct, fill in bare minimum */
1975 ei
.p
.family
= AF_INET
;
1976 ei
.p
.prefix
= type7
->data
->id
;
1977 ei
.p
.prefixlen
= ip_masklen(ext
->mask
);
1978 ei
.type
= ZEBRA_ROUTE_OSPF
;
1979 ei
.nexthop
= ext
->header
.adv_router
;
1980 ei
.route_map_set
.metric
= -1;
1981 ei
.route_map_set
.metric_type
= -1;
1985 if ((new = ospf_external_lsa_new(ospf
, &ei
, &type7
->data
->id
))
1987 if (IS_DEBUG_OSPF_NSSA
)
1989 "%s: Could not originate Translated Type-5 for %pI4",
1990 __func__
, &ei
.p
.prefix
);
1994 extnew
= (struct as_external_lsa
*)(new->data
);
1996 /* copy over Type-7 data to new */
1997 extnew
->e
[0].tos
= ext
->e
[0].tos
;
1998 extnew
->e
[0].route_tag
= ext
->e
[0].route_tag
;
1999 if (type7
->area
->suppress_fa
) {
2000 extnew
->e
[0].fwd_addr
.s_addr
= 0;
2001 if (IS_DEBUG_OSPF_NSSA
)
2002 zlog_debug("%s: Suppress forwarding address for %pI4",
2003 __func__
, &ei
.p
.prefix
);
2005 extnew
->e
[0].fwd_addr
.s_addr
= ext
->e
[0].fwd_addr
.s_addr
;
2006 new->data
->ls_seqnum
= type7
->data
->ls_seqnum
;
2008 /* add translated flag, checksum and lock new lsa */
2009 SET_FLAG(new->flags
, OSPF_LSA_LOCAL_XLT
); /* Translated from 7 */
2010 new = ospf_lsa_lock(new);
2015 /* Originate Translated Type-5 for supplied Type-7 NSSA LSA */
2016 struct ospf_lsa
*ospf_translated_nssa_originate(struct ospf
*ospf
,
2017 struct ospf_lsa
*type7
,
2018 struct ospf_lsa
*type5
)
2020 struct ospf_lsa
*new, *translated_lsa
;
2021 struct as_external_lsa
*extnew
;
2023 if (ospf
->gr_info
.restart_in_progress
) {
2024 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
2026 "LSA[Translated Type5]: Graceful Restart in progress, don't originate");
2030 /* we cant use ospf_external_lsa_originate() as we need to set
2031 * the OSPF_LSA_LOCAL_XLT flag, must originate by hand
2034 if ((translated_lsa
= ospf_lsa_translated_nssa_new(ospf
, type7
)) ==
2036 if (IS_DEBUG_OSPF_NSSA
)
2038 "%s: Could not translate Type-7, Id %pI4, to Type-5",
2039 __func__
, &type7
->data
->id
);
2043 extnew
= (struct as_external_lsa
*)translated_lsa
->data
;
2045 /* Update LSA sequence number from translated Type-5 LSA */
2047 translated_lsa
->data
->ls_seqnum
= lsa_seqnum_increment(type5
);
2049 if ((new = ospf_lsa_install(ospf
, NULL
, translated_lsa
)) == NULL
) {
2050 flog_warn(EC_OSPF_LSA_INSTALL_FAILURE
,
2051 "%s: Could not install LSA id %pI4", __func__
,
2053 ospf_lsa_free(translated_lsa
);
2057 if (IS_DEBUG_OSPF_NSSA
) {
2058 zlog_debug("%s: translated Type 7, installed", __func__
);
2059 ospf_lsa_header_dump(new->data
);
2060 zlog_debug(" Network mask: %d", ip_masklen(extnew
->mask
));
2061 zlog_debug(" Forward addr: %pI4",
2062 &extnew
->e
[0].fwd_addr
);
2065 ospf
->lsa_originate_count
++;
2066 ospf_flood_through_as(ospf
, NULL
, new);
2071 /* Refresh Translated from NSSA AS-external-LSA. */
2072 struct ospf_lsa
*ospf_translated_nssa_refresh(struct ospf
*ospf
,
2073 struct ospf_lsa
*type7
,
2074 struct ospf_lsa
*type5
)
2076 struct ospf_lsa
*new = NULL
, *translated_lsa
= NULL
;
2077 struct as_external_lsa
*extold
= NULL
;
2078 uint32_t ls_seqnum
= 0;
2080 /* Sanity checks. */
2081 assert(type7
|| type5
);
2082 if (!(type7
|| type5
))
2085 assert(type7
->data
);
2087 assert(type5
->data
);
2088 assert(ospf
->anyNSSA
);
2090 /* get required data according to what has been given */
2091 if (type7
&& type5
== NULL
) {
2092 /* find the translated Type-5 for this Type-7 */
2093 struct as_external_lsa
*ext
=
2094 (struct as_external_lsa
*)(type7
->data
);
2095 struct prefix_ipv4 p
= {
2096 .prefix
= type7
->data
->id
,
2097 .prefixlen
= ip_masklen(ext
->mask
),
2101 type5
= ospf_external_info_find_lsa(ospf
, &p
);
2102 } else if (type5
&& type7
== NULL
) {
2103 /* find the type-7 from which supplied type-5 was translated,
2104 * ie find first type-7 with same LSA Id.
2106 struct listnode
*ln
, *lnn
;
2107 struct route_node
*rn
;
2108 struct ospf_lsa
*lsa
;
2109 struct ospf_area
*area
;
2111 for (ALL_LIST_ELEMENTS(ospf
->areas
, ln
, lnn
, area
)) {
2112 if (area
->external_routing
!= OSPF_AREA_NSSA
&& !type7
)
2115 LSDB_LOOP (NSSA_LSDB(area
), rn
, lsa
) {
2116 if (lsa
->data
->id
.s_addr
2117 == type5
->data
->id
.s_addr
) {
2125 /* do we have type7? */
2127 if (IS_DEBUG_OSPF_NSSA
)
2128 zlog_debug("%s: no Type-7 found for Type-5 LSA Id %pI4",
2129 __func__
, &type5
->data
->id
);
2133 /* do we have valid translated type5? */
2134 if (type5
== NULL
|| !CHECK_FLAG(type5
->flags
, OSPF_LSA_LOCAL_XLT
)) {
2135 if (IS_DEBUG_OSPF_NSSA
)
2137 "%s: No translated Type-5 found for Type-7 with Id %pI4",
2138 __func__
, &type7
->data
->id
);
2142 extold
= (struct as_external_lsa
*)type5
->data
;
2143 if (type7
->area
->suppress_fa
== 1) {
2144 if (extold
->e
[0].fwd_addr
.s_addr
== 0)
2145 ls_seqnum
= ntohl(type5
->data
->ls_seqnum
);
2148 /* Delete LSA from neighbor retransmit-list. */
2149 ospf_ls_retransmit_delete_nbr_as(ospf
, type5
);
2151 /* create new translated LSA */
2152 if ((translated_lsa
= ospf_lsa_translated_nssa_new(ospf
, type7
)) ==
2154 if (IS_DEBUG_OSPF_NSSA
)
2156 "%s: Could not translate Type-7 for %pI4 to Type-5",
2157 __func__
, &type7
->data
->id
);
2161 if (type7
->area
->suppress_fa
== 1) {
2162 if (extold
->e
[0].fwd_addr
.s_addr
== 0)
2163 translated_lsa
->data
->ls_seqnum
= htonl(ls_seqnum
+ 1);
2166 if (!(new = ospf_lsa_install(ospf
, NULL
, translated_lsa
))) {
2167 flog_warn(EC_OSPF_LSA_INSTALL_FAILURE
,
2168 "%s: Could not install translated LSA, Id %pI4",
2169 __func__
, &type7
->data
->id
);
2170 ospf_lsa_free(translated_lsa
);
2174 /* Flood LSA through area. */
2175 ospf_flood_through_as(ospf
, NULL
, new);
2180 /* Originate an AS-external-LSA, install and flood. */
2181 struct ospf_lsa
*ospf_external_lsa_originate(struct ospf
*ospf
,
2182 struct external_info
*ei
)
2184 struct ospf_lsa
*new;
2186 if (ospf
->gr_info
.restart_in_progress
) {
2187 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
2189 "LSA[Type5]: Graceful Restart in progress, don't originate");
2193 /* Added for NSSA project....
2195 External LSAs are originated in ASBRs as usual, but for NSSA
2197 there is the global Type-5 LSDB and a Type-7 LSDB installed for
2198 every area. The Type-7's are flooded to every IR and every ABR; We
2199 install the Type-5 LSDB so that the normal "refresh" code operates
2200 as usual, and flag them as not used during ASE calculations. The
2201 Type-7 LSDB is used for calculations. Each Type-7 has a Forwarding
2202 Address of non-zero.
2204 If an ABR is the elected NSSA translator, following SPF and during
2205 the ABR task it will translate all the scanned Type-7's, with P-bit
2206 ON and not-self generated, and translate to Type-5's throughout the
2209 A difference in operation depends whether this ASBR is an ABR
2210 or not. If not an ABR, the P-bit is ON, to indicate that any
2211 elected NSSA-ABR can perform its translation.
2213 If an ABR, the P-bit is OFF; No ABR will perform translation and
2214 this ASBR will flood the Type-5 LSA as usual.
2216 For the case where this ASBR is not an ABR, the ASE calculations
2217 are based on the Type-5 LSDB; The Type-7 LSDB exists just to
2218 demonstrate to the user that there are LSA's that belong to any
2221 Finally, it just so happens that when the ABR is translating every
2222 Type-7 into Type-5, it installs it into the Type-5 LSDB as an
2223 approved Type-5 (translated from Type-7); at the end of translation
2224 if any Translated Type-5's remain unapproved, then they must be
2225 flushed from the AS.
2229 if (ospf
->router_id
.s_addr
== INADDR_ANY
) {
2230 if (ei
&& IS_DEBUG_OSPF_EVENT
)
2232 "LSA[Type5:%pI4]: deferring AS-external-LSA origination, router ID is zero",
2237 /* Create new AS-external-LSA instance. */
2238 if ((new = ospf_external_lsa_new(ospf
, ei
, NULL
)) == NULL
) {
2239 if (ei
&& IS_DEBUG_OSPF_EVENT
)
2241 "LSA[Type5:%pI4]: Could not originate AS-external-LSA",
2246 /* Install newly created LSA into Type-5 LSDB, lock = 1. */
2247 ospf_lsa_install(ospf
, NULL
, new);
2249 /* Update LSA origination count. */
2250 ospf
->lsa_originate_count
++;
2252 /* Flooding new LSA. only to AS (non-NSSA/STUB) */
2253 ospf_flood_through_as(ospf
, NULL
, new);
2255 /* If there is any attached NSSA, do special handling */
2256 if (ospf
->anyNSSA
&&
2257 /* stay away from translated LSAs! */
2258 !(CHECK_FLAG(new->flags
, OSPF_LSA_LOCAL_XLT
)))
2259 ospf_install_flood_nssa(
2260 ospf
, new, ei
); /* Install/Flood Type-7 to all NSSAs */
2262 /* Debug logging. */
2263 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
)) {
2264 zlog_debug("LSA[Type%d:%pI4]: Originate AS-external-LSA %p",
2265 new->data
->type
, &new->data
->id
,
2267 ospf_lsa_header_dump(new->data
);
2273 static struct external_info
*ospf_default_external_info(struct ospf
*ospf
)
2276 struct prefix_ipv4 p
;
2277 struct external_info
*default_ei
;
2281 p
.prefix
.s_addr
= 0;
2284 default_ei
= ospf_external_info_lookup(ospf
, DEFAULT_ROUTE
, 0, &p
);
2288 /* First, lookup redistributed default route. */
2289 for (type
= 0; type
<= ZEBRA_ROUTE_MAX
; type
++) {
2290 struct list
*ext_list
;
2292 if (type
== ZEBRA_ROUTE_OSPF
)
2295 ext_list
= ospf
->external
[type
];
2299 ret
= ospf_external_default_routemap_apply_walk(ospf
, ext_list
,
2308 void ospf_external_lsa_rid_change(struct ospf
*ospf
)
2310 struct external_info
*ei
;
2311 struct ospf_external_aggr_rt
*aggr
;
2312 struct ospf_lsa
*lsa
= NULL
;
2316 for (type
= 0; type
< ZEBRA_ROUTE_MAX
; type
++) {
2317 struct route_node
*rn
;
2318 struct route_table
*rt
;
2319 struct list
*ext_list
;
2320 struct listnode
*node
;
2321 struct ospf_external
*ext
;
2323 ext_list
= ospf
->external
[type
];
2327 for (ALL_LIST_ELEMENTS_RO(ext_list
, node
, ext
)) {
2328 /* Originate As-external-LSA from all type of
2329 * distribute source.
2331 rt
= ext
->external_info
;
2335 for (rn
= route_top(rt
); rn
; rn
= route_next(rn
)) {
2341 if (is_default_prefix4(&ei
->p
))
2344 lsa
= ospf_external_info_find_lsa(ospf
, &ei
->p
);
2346 aggr
= ospf_external_aggr_match(ospf
, &ei
->p
);
2349 if (!ospf_redistribute_check(ospf
, ei
,
2353 if (IS_DEBUG_OSPF(lsa
, EXTNL_LSA_AGGR
))
2355 "Originate Summary LSA after reset/router-ID change");
2357 /* Here the LSA is originated as new */
2358 ospf_originate_summary_lsa(ospf
, aggr
,
2361 /* LSA needs to be refreshed even if
2362 * there is no change in the route
2363 * params if the LSA is in maxage.
2365 if (IS_LSA_MAXAGE(lsa
))
2366 force
= LSA_REFRESH_FORCE
;
2368 force
= LSA_REFRESH_IF_CHANGED
;
2370 ospf_external_lsa_refresh(ospf
, lsa
,
2373 if (!ospf_redistribute_check(ospf
, ei
,
2377 if (!ospf_external_lsa_originate(ospf
,
2380 EC_OSPF_LSA_INSTALL_FAILURE
,
2381 "LSA: AS-external-LSA was not originated.");
2387 ei
= ospf_default_external_info(ospf
);
2388 if (ei
&& !ospf_external_lsa_originate(ospf
, ei
)) {
2389 flog_warn(EC_OSPF_LSA_INSTALL_FAILURE
,
2390 "LSA: AS-external-LSA for default route was not originated.");
2394 /* Flush any NSSA LSAs for given prefix */
2395 void ospf_nssa_lsa_flush(struct ospf
*ospf
, struct prefix_ipv4
*p
)
2397 struct listnode
*node
, *nnode
;
2398 struct ospf_lsa
*lsa
= NULL
;
2399 struct ospf_area
*area
;
2401 for (ALL_LIST_ELEMENTS(ospf
->areas
, node
, nnode
, area
)) {
2402 if (area
->external_routing
== OSPF_AREA_NSSA
) {
2403 lsa
= ospf_lsa_lookup(ospf
, area
, OSPF_AS_NSSA_LSA
,
2404 p
->prefix
, ospf
->router_id
);
2406 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
2408 "LSA: There is no such AS-NSSA-LSA %pFX in LSDB",
2412 ospf_ls_retransmit_delete_nbr_area(area
, lsa
);
2413 if (!IS_LSA_MAXAGE(lsa
)) {
2414 ospf_refresher_unregister_lsa(ospf
, lsa
);
2415 ospf_lsa_flush_area(lsa
, area
);
2421 /* Flush an AS-external-LSA from LSDB and routing domain. */
2422 void ospf_external_lsa_flush(struct ospf
*ospf
, uint8_t type
,
2423 struct prefix_ipv4
*p
,
2424 ifindex_t ifindex
/*, struct in_addr nexthop */)
2426 struct ospf_lsa
*lsa
;
2428 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
2429 zlog_debug("LSA: Flushing AS-external-LSA %pFX", p
);
2431 /* First lookup LSA from LSDB. */
2432 if (!(lsa
= ospf_external_info_find_lsa(ospf
, p
))) {
2433 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
2435 "LSA: There is no such AS-external-LSA %pFX in LSDB",
2440 /* If LSA is selforiginated, not a translated LSA, and there is
2441 * NSSA area, flush Type-7 LSA's at first.
2443 if (IS_LSA_SELF(lsa
) && (ospf
->anyNSSA
)
2444 && !(CHECK_FLAG(lsa
->flags
, OSPF_LSA_LOCAL_XLT
)))
2445 ospf_nssa_lsa_flush(ospf
, p
);
2447 if (!IS_LSA_MAXAGE(lsa
)) {
2448 /* Sweep LSA from Link State Retransmit List. */
2449 ospf_ls_retransmit_delete_nbr_as(ospf
, lsa
);
2451 /* Unregister LSA from Refresh queue. */
2452 ospf_refresher_unregister_lsa(ospf
, lsa
);
2454 /* Flush AS-external-LSA through AS. */
2455 ospf_lsa_flush_as(ospf
, lsa
);
2458 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
2459 zlog_debug("%s: stop", __func__
);
2462 void ospf_external_lsa_refresh_default(struct ospf
*ospf
)
2464 struct prefix_ipv4 p
;
2465 struct external_info
*ei
;
2466 struct ospf_lsa
*lsa
;
2470 p
.prefix
.s_addr
= INADDR_ANY
;
2472 ei
= ospf_default_external_info(ospf
);
2473 lsa
= ospf_external_info_find_lsa(ospf
, &p
);
2476 if (IS_DEBUG_OSPF_EVENT
)
2477 zlog_debug("LSA[Type5:0.0.0.0]: Refresh AS-external-LSA %p",
2479 ospf_external_lsa_refresh(ospf
, lsa
, ei
, LSA_REFRESH_FORCE
,
2481 } else if (ei
&& !lsa
) {
2482 if (IS_DEBUG_OSPF_EVENT
)
2484 "LSA[Type5:0.0.0.0]: Originate AS-external-LSA");
2485 ospf_external_lsa_originate(ospf
, ei
);
2487 if (IS_DEBUG_OSPF_EVENT
)
2488 zlog_debug("LSA[Type5:0.0.0.0]: Flush AS-external-LSA");
2489 ospf_external_lsa_flush(ospf
, DEFAULT_ROUTE
, &p
, 0);
2493 void ospf_external_lsa_refresh_type(struct ospf
*ospf
, uint8_t type
,
2494 unsigned short instance
, int force
)
2496 struct route_node
*rn
;
2497 struct external_info
*ei
;
2498 struct ospf_external
*ext
;
2500 if (type
== DEFAULT_ROUTE
)
2503 ext
= ospf_external_lookup(ospf
, type
, instance
);
2505 if (ext
&& EXTERNAL_INFO(ext
)) {
2506 /* Refresh each redistributed AS-external-LSAs. */
2507 for (rn
= route_top(EXTERNAL_INFO(ext
)); rn
;
2508 rn
= route_next(rn
)) {
2511 if (!is_default_prefix4(&ei
->p
)) {
2512 struct ospf_lsa
*lsa
;
2513 struct ospf_external_aggr_rt
*aggr
;
2515 aggr
= ospf_external_aggr_match(ospf
,
2517 lsa
= ospf_external_info_find_lsa(
2520 /* Check the AS-external-LSA
2521 * should be originated.
2523 if (!ospf_redistribute_check(
2526 ospf_unlink_ei_from_aggr(
2535 "%s: Send Aggreate LSA (%pFX)",
2539 ospf_originate_summary_lsa(
2544 if (IS_LSA_MAXAGE(lsa
))
2545 force
= LSA_REFRESH_FORCE
;
2547 ospf_external_lsa_refresh(
2548 ospf
, lsa
, ei
, force
,
2551 if (!ospf_redistribute_check(
2554 ospf_external_lsa_originate(
2563 /* Refresh AS-external-LSA. */
2564 struct ospf_lsa
*ospf_external_lsa_refresh(struct ospf
*ospf
,
2565 struct ospf_lsa
*lsa
,
2566 struct external_info
*ei
, int force
,
2569 struct ospf_lsa
*new;
2572 /* Check the AS-external-LSA should be originated. */
2574 if (!ospf_redistribute_check(ospf
, ei
, &changed
)) {
2575 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
2577 "LSA[Type%d:%pI4] Could not be refreshed, redist check fail",
2581 ospf_external_lsa_flush(ospf
, ei
->type
, &ei
->p
,
2582 ei
->ifindex
/*, ei->nexthop */);
2586 if (!changed
&& !force
) {
2587 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
2589 "LSA[Type%d:%pI4]: Not refreshed, not changed/forced",
2590 lsa
->data
->type
, &lsa
->data
->id
);
2594 /* Delete LSA from neighbor retransmit-list. */
2595 ospf_ls_retransmit_delete_nbr_as(ospf
, lsa
);
2597 /* Unregister AS-external-LSA from refresh-list. */
2598 ospf_refresher_unregister_lsa(ospf
, lsa
);
2600 new = ospf_external_lsa_new(ospf
, ei
, &lsa
->data
->id
);
2603 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
2604 zlog_debug("LSA[Type%d:%pI4]: Could not be refreshed",
2605 lsa
->data
->type
, &lsa
->data
->id
);
2609 new->data
->ls_seqnum
= lsa_seqnum_increment(lsa
);
2611 ospf_lsa_install(ospf
, NULL
, new); /* As type-5. */
2613 /* Flood LSA through AS. */
2614 ospf_flood_through_as(ospf
, NULL
, new);
2616 /* If any attached NSSA, install as Type-7, flood to all NSSA Areas */
2617 if (ospf
->anyNSSA
&& !(CHECK_FLAG(new->flags
, OSPF_LSA_LOCAL_XLT
)))
2618 ospf_install_flood_nssa(ospf
, new,
2619 ei
); /* Install/Flood per new rules */
2621 /* Register self-originated LSA to refresh queue.
2622 * Translated LSAs should not be registered, but refreshed upon
2623 * refresh of the Type-7
2625 if (!CHECK_FLAG(new->flags
, OSPF_LSA_LOCAL_XLT
))
2626 ospf_refresher_register_lsa(ospf
, new);
2628 /* Debug logging. */
2629 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
)) {
2630 zlog_debug("LSA[Type%d:%pI4]: AS-external-LSA refresh",
2631 new->data
->type
, &new->data
->id
);
2632 ospf_lsa_header_dump(new->data
);
2639 /* LSA installation functions. */
2641 /* Install router-LSA to an area. */
2642 static struct ospf_lsa
*
2643 ospf_router_lsa_install(struct ospf
*ospf
, struct ospf_lsa
*new, int rt_recalc
)
2645 struct ospf_area
*area
= new->area
;
2647 /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs
2648 The entire routing table must be recalculated, starting with
2649 the shortest path calculations for each area (not just the
2650 area whose link-state database has changed).
2653 if (IS_LSA_SELF(new)) {
2655 /* Only install LSA if it is originated/refreshed by us.
2656 * If LSA was received by flooding, the RECEIVED flag is set so
2658 * not link the LSA */
2659 if (CHECK_FLAG(new->flags
, OSPF_LSA_RECEIVED
))
2660 return new; /* ignore stale LSA */
2662 /* Set self-originated router-LSA. */
2663 ospf_lsa_unlock(&area
->router_lsa_self
);
2664 area
->router_lsa_self
= ospf_lsa_lock(new);
2666 ospf_refresher_register_lsa(ospf
, new);
2669 ospf_spf_calculate_schedule(ospf
, SPF_FLAG_ROUTER_LSA_INSTALL
);
2673 /* Install network-LSA to an area. */
2674 static struct ospf_lsa
*ospf_network_lsa_install(struct ospf
*ospf
,
2675 struct ospf_interface
*oi
,
2676 struct ospf_lsa
*new,
2680 /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs
2681 The entire routing table must be recalculated, starting with
2682 the shortest path calculations for each area (not just the
2683 area whose link-state database has changed).
2685 if (IS_LSA_SELF(new)) {
2686 /* We supposed that when LSA is originated by us, we pass the
2688 for which it was originated. If LSA was received by flooding,
2689 the RECEIVED flag is set, so we do not link the LSA to the
2691 if (CHECK_FLAG(new->flags
, OSPF_LSA_RECEIVED
))
2692 return new; /* ignore stale LSA */
2694 ospf_lsa_unlock(&oi
->network_lsa_self
);
2695 oi
->network_lsa_self
= ospf_lsa_lock(new);
2696 ospf_refresher_register_lsa(ospf
, new);
2699 ospf_spf_calculate_schedule(ospf
, SPF_FLAG_NETWORK_LSA_INSTALL
);
2704 /* Install summary-LSA to an area. */
2705 static struct ospf_lsa
*
2706 ospf_summary_lsa_install(struct ospf
*ospf
, struct ospf_lsa
*new, int rt_recalc
)
2708 if (rt_recalc
&& !IS_LSA_SELF(new)) {
2709 /* RFC 2328 Section 13.2 Summary-LSAs
2710 The best route to the destination described by the summary-
2711 LSA must be recalculated (see Section 16.5). If this
2712 destination is an AS boundary router, it may also be
2713 necessary to re-examine all the AS-external-LSAs.
2716 ospf_spf_calculate_schedule(ospf
, SPF_FLAG_SUMMARY_LSA_INSTALL
);
2719 if (IS_LSA_SELF(new))
2720 ospf_refresher_register_lsa(ospf
, new);
2725 /* Install ASBR-summary-LSA to an area. */
2726 static struct ospf_lsa
*ospf_summary_asbr_lsa_install(struct ospf
*ospf
,
2727 struct ospf_lsa
*new,
2730 if (rt_recalc
&& !IS_LSA_SELF(new)) {
2731 /* RFC 2328 Section 13.2 Summary-LSAs
2732 The best route to the destination described by the summary-
2733 LSA must be recalculated (see Section 16.5). If this
2734 destination is an AS boundary router, it may also be
2735 necessary to re-examine all the AS-external-LSAs.
2737 ospf_spf_calculate_schedule(ospf
,
2738 SPF_FLAG_ASBR_SUMMARY_LSA_INSTALL
);
2741 /* register LSA to refresh-list. */
2742 if (IS_LSA_SELF(new))
2743 ospf_refresher_register_lsa(ospf
, new);
2748 /* Install AS-external-LSA. */
2749 static struct ospf_lsa
*ospf_external_lsa_install(struct ospf
*ospf
,
2750 struct ospf_lsa
*new,
2753 ospf_ase_register_external_lsa(new, ospf
);
2754 /* If LSA is not self-originated, calculate an external route. */
2756 /* RFC 2328 Section 13.2 AS-external-LSAs
2757 The best route to the destination described by the AS-
2758 external-LSA must be recalculated (see Section 16.6).
2761 if (!IS_LSA_SELF(new))
2762 ospf_ase_incremental_update(ospf
, new);
2765 if (new->data
->type
== OSPF_AS_NSSA_LSA
) {
2766 /* There is no point to register selforiginate Type-7 LSA for
2767 * refreshing. We rely on refreshing Type-5 LSA's
2769 if (IS_LSA_SELF(new))
2772 /* Try refresh type-5 translated LSA for this LSA, if
2774 * New translations will be taken care of by the
2777 ospf_translated_nssa_refresh(ospf
, new, NULL
);
2778 ospf_schedule_abr_task(ospf
);
2782 /* Register self-originated LSA to refresh queue.
2783 * Leave Translated LSAs alone if NSSA is enabled
2785 if (IS_LSA_SELF(new) && !CHECK_FLAG(new->flags
, OSPF_LSA_LOCAL_XLT
))
2786 ospf_refresher_register_lsa(ospf
, new);
2791 void ospf_discard_from_db(struct ospf
*ospf
, struct ospf_lsdb
*lsdb
,
2792 struct ospf_lsa
*lsa
)
2794 struct ospf_lsa
*old
;
2799 old
= ospf_lsdb_lookup(lsdb
, lsa
);
2804 if (old
->refresh_list
>= 0)
2805 ospf_refresher_unregister_lsa(ospf
, old
);
2807 switch (old
->data
->type
) {
2808 case OSPF_AS_EXTERNAL_LSA
:
2809 ospf_ase_unregister_external_lsa(old
, ospf
);
2810 ospf_ls_retransmit_delete_nbr_as(ospf
, old
);
2812 case OSPF_OPAQUE_AS_LSA
:
2813 ospf_ls_retransmit_delete_nbr_as(ospf
, old
);
2815 case OSPF_AS_NSSA_LSA
:
2816 ospf_ls_retransmit_delete_nbr_area(old
->area
, old
);
2817 ospf_ase_unregister_external_lsa(old
, ospf
);
2820 ospf_ls_retransmit_delete_nbr_area(old
->area
, old
);
2824 ospf_lsa_maxage_delete(ospf
, old
);
2825 ospf_lsa_discard(old
);
2828 struct ospf_lsa
*ospf_lsa_install(struct ospf
*ospf
, struct ospf_interface
*oi
,
2829 struct ospf_lsa
*lsa
)
2831 struct ospf_lsa
*new = NULL
;
2832 struct ospf_lsa
*old
= NULL
;
2833 struct ospf_lsdb
*lsdb
= NULL
;
2837 switch (lsa
->data
->type
) {
2839 case OSPF_AS_NSSA_LSA
:
2841 lsdb
= lsa
->area
->lsdb
;
2845 case OSPF_AS_EXTERNAL_LSA
:
2846 case OSPF_OPAQUE_AS_LSA
:
2851 lsdb
= lsa
->area
->lsdb
;
2857 /* RFC 2328 13.2. Installing LSAs in the database
2859 Installing a new LSA in the database, either as the result of
2860 flooding or a newly self-originated LSA, may cause the OSPF
2861 routing table structure to be recalculated. The contents of the
2862 new LSA should be compared to the old instance, if present. If
2863 there is no difference, there is no need to recalculate the
2864 routing table. When comparing an LSA to its previous instance,
2865 the following are all considered to be differences in contents:
2867 o The LSA's Options field has changed.
2869 o One of the LSA instances has LS age set to MaxAge, and
2872 o The length field in the LSA header has changed.
2874 o The body of the LSA (i.e., anything outside the 20-byte
2875 LSA header) has changed. Note that this excludes changes
2876 in LS Sequence Number and LS Checksum.
2879 /* Look up old LSA and determine if any SPF calculation or incremental
2881 old
= ospf_lsdb_lookup(lsdb
, lsa
);
2883 /* Do comparison and record if recalc needed. */
2885 if (old
== NULL
|| ospf_lsa_different(old
, lsa
, false)) {
2886 /* Ref rfc3623 section 3.2.3
2887 * Installing new lsa or change in the existing LSA
2888 * or flushing existing LSA leads to topo change
2889 * and trigger SPF caculation.
2890 * So, router should be aborted from HELPER role
2891 * if it is detected as TOPO change.
2893 if (ospf
->active_restarter_cnt
&&
2894 CHECK_LSA_TYPE_1_TO_5_OR_7(lsa
->data
->type
)) {
2895 if (old
== NULL
|| ospf_lsa_different(old
, lsa
, true))
2896 ospf_helper_handle_topo_chg(ospf
, lsa
);
2903 Sequence number check (Section 14.1 of rfc 2328)
2904 "Premature aging is used when it is time for a self-originated
2905 LSA's sequence number field to wrap. At this point, the current
2906 LSA instance (having LS sequence number MaxSequenceNumber) must
2907 be prematurely aged and flushed from the routing domain before a
2908 new instance with sequence number equal to InitialSequenceNumber
2909 can be originated. "
2912 if (ntohl(lsa
->data
->ls_seqnum
) - 1 == OSPF_MAX_SEQUENCE_NUMBER
) {
2913 if (ospf_lsa_is_self_originated(ospf
, lsa
)) {
2914 lsa
->data
->ls_seqnum
= htonl(OSPF_MAX_SEQUENCE_NUMBER
);
2916 if (!IS_LSA_MAXAGE(lsa
))
2917 lsa
->flags
|= OSPF_LSA_PREMATURE_AGE
;
2918 lsa
->data
->ls_age
= htons(OSPF_LSA_MAXAGE
);
2920 if (IS_DEBUG_OSPF(lsa
, LSA_REFRESH
)) {
2922 "%s() Premature Aging lsa %p, seqnum 0x%x",
2924 ntohl(lsa
->data
->ls_seqnum
));
2925 ospf_lsa_header_dump(lsa
->data
);
2928 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
)) {
2930 "%s() got an lsa with seq 0x80000000 that was not self originated. Ignoring",
2932 ospf_lsa_header_dump(lsa
->data
);
2938 /* discard old LSA from LSDB */
2940 ospf_discard_from_db(ospf
, lsdb
, lsa
);
2942 /* Calculate Checksum if self-originated?. */
2943 if (IS_LSA_SELF(lsa
))
2944 ospf_lsa_checksum(lsa
->data
);
2946 /* Insert LSA to LSDB. */
2947 ospf_lsdb_add(lsdb
, lsa
);
2950 /* Do LSA specific installation process. */
2951 switch (lsa
->data
->type
) {
2952 case OSPF_ROUTER_LSA
:
2953 new = ospf_router_lsa_install(ospf
, lsa
, rt_recalc
);
2955 case OSPF_NETWORK_LSA
:
2957 new = ospf_network_lsa_install(ospf
, oi
, lsa
, rt_recalc
);
2959 case OSPF_SUMMARY_LSA
:
2960 new = ospf_summary_lsa_install(ospf
, lsa
, rt_recalc
);
2962 case OSPF_ASBR_SUMMARY_LSA
:
2963 new = ospf_summary_asbr_lsa_install(ospf
, lsa
, rt_recalc
);
2965 case OSPF_AS_EXTERNAL_LSA
:
2966 new = ospf_external_lsa_install(ospf
, lsa
, rt_recalc
);
2968 case OSPF_OPAQUE_LINK_LSA
:
2969 if (IS_LSA_SELF(lsa
))
2970 lsa
->oi
= oi
; /* Specify outgoing ospf-interface for
2973 /* Incoming "oi" for this LSA has set at LSUpd
2977 case OSPF_OPAQUE_AREA_LSA
:
2978 case OSPF_OPAQUE_AS_LSA
:
2979 new = ospf_opaque_lsa_install(lsa
, rt_recalc
);
2981 case OSPF_AS_NSSA_LSA
:
2982 new = ospf_external_lsa_install(ospf
, lsa
, rt_recalc
);
2983 default: /* type-6,8,9....nothing special */
2988 return new; /* Installation failed, cannot proceed further --
2992 if (IS_DEBUG_OSPF(lsa
, LSA_INSTALL
)) {
2993 switch (lsa
->data
->type
) {
2994 case OSPF_AS_EXTERNAL_LSA
:
2995 case OSPF_OPAQUE_AS_LSA
:
2996 case OSPF_AS_NSSA_LSA
:
2997 zlog_debug("LSA[%s]: Install %s", dump_lsa_key(new),
2998 lookup_msg(ospf_lsa_type_msg
,
2999 new->data
->type
, NULL
));
3002 zlog_debug("LSA[%s]: Install %s to Area %pI4",
3004 lookup_msg(ospf_lsa_type_msg
,
3005 new->data
->type
, NULL
),
3006 &new->area
->area_id
);
3012 If received LSA' ls_age is MaxAge, or lsa is being prematurely aged
3013 (it's getting flushed out of the area), set LSA on MaxAge LSA list.
3015 if (IS_LSA_MAXAGE(new)) {
3016 if (IS_DEBUG_OSPF(lsa
, LSA_INSTALL
))
3017 zlog_debug("LSA[%s]: Install LSA %p, MaxAge",
3018 dump_lsa_key(new), lsa
);
3019 ospf_lsa_maxage(ospf
, lsa
);
3026 int ospf_check_nbr_status(struct ospf
*ospf
)
3028 struct listnode
*node
, *nnode
;
3029 struct ospf_interface
*oi
;
3031 for (ALL_LIST_ELEMENTS(ospf
->oiflist
, node
, nnode
, oi
)) {
3032 struct route_node
*rn
;
3033 struct ospf_neighbor
*nbr
;
3035 if (ospf_if_is_enable(oi
))
3036 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
))
3037 if ((nbr
= rn
->info
) != NULL
)
3038 if (nbr
->state
== NSM_Exchange
3039 || nbr
->state
== NSM_Loading
) {
3040 route_unlock_node(rn
);
3049 void ospf_maxage_lsa_remover(struct event
*thread
)
3051 struct ospf
*ospf
= EVENT_ARG(thread
);
3052 struct ospf_lsa
*lsa
, *old
;
3053 struct route_node
*rn
;
3056 ospf
->t_maxage
= NULL
;
3058 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3059 zlog_debug("LSA[MaxAge]: remover Start");
3061 reschedule
= !ospf_check_nbr_status(ospf
);
3064 for (rn
= route_top(ospf
->maxage_lsa
); rn
;
3065 rn
= route_next(rn
)) {
3066 if ((lsa
= rn
->info
) == NULL
) {
3070 /* There is at least one neighbor from which we still
3072 * for that LSA, so we are not allowed to remove it from
3074 * as per RFC 2328 section 14 para 4 a) */
3075 if (lsa
->retransmit_counter
> 0) {
3080 /* TODO: maybe convert this function to a work-queue */
3081 if (event_should_yield(thread
)) {
3082 OSPF_TIMER_ON(ospf
->t_maxage
,
3083 ospf_maxage_lsa_remover
, 0);
3085 rn
); /* route_top/route_next */
3089 /* Remove LSA from the LSDB */
3090 if (IS_LSA_SELF(lsa
))
3091 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3093 "LSA[Type%d:%pI4]: LSA 0x%lx is self-originated: ",
3096 (unsigned long)lsa
);
3098 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3100 "LSA[%s]: MaxAge LSA removed from list",
3103 if (CHECK_FLAG(lsa
->flags
, OSPF_LSA_PREMATURE_AGE
)) {
3104 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3106 "originating new lsa for lsa %p",
3108 ospf_lsa_refresh(ospf
, lsa
);
3111 /* Remove from lsdb. */
3113 old
= ospf_lsdb_lookup(lsa
->lsdb
, lsa
);
3114 /* The max age LSA here must be the same
3115 * as the LSA in LSDB
3118 flog_err(EC_OSPF_LSA_MISSING
,
3119 "%s: LSA[%s]: LSA not in LSDB",
3120 __func__
, dump_lsa_key(lsa
));
3124 ospf_discard_from_db(ospf
, lsa
->lsdb
, lsa
);
3125 ospf_lsdb_delete(lsa
->lsdb
, lsa
);
3127 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3129 "%s: LSA[%s]: No associated LSDB!",
3130 __func__
, dump_lsa_key(lsa
));
3134 /* A MaxAge LSA must be removed immediately from the router's link
3135 state database as soon as both a) it is no longer contained on any
3136 neighbor Link state retransmission lists and b) none of the
3138 neighbors are in states Exchange or Loading. */
3140 OSPF_TIMER_ON(ospf
->t_maxage
, ospf_maxage_lsa_remover
,
3141 ospf
->maxage_delay
);
3144 /* This function checks whether an LSA with initial sequence number should be
3145 * originated after a wrap in sequence number
3147 void ospf_check_and_gen_init_seq_lsa(struct ospf_interface
*oi
,
3148 struct ospf_lsa
*recv_lsa
)
3150 struct ospf_lsa
*lsa
= NULL
;
3151 struct ospf
*ospf
= oi
->ospf
;
3153 lsa
= ospf_lsa_lookup_by_header(oi
->area
, recv_lsa
->data
);
3155 if ((lsa
== NULL
) || (!CHECK_FLAG(lsa
->flags
, OSPF_LSA_PREMATURE_AGE
))
3156 || (lsa
->retransmit_counter
!= 0)) {
3157 if (IS_DEBUG_OSPF(lsa
, LSA
))
3159 "Do not generate LSA with initial seqence number.");
3163 ospf_lsa_maxage_delete(ospf
, lsa
);
3165 lsa
->data
->ls_seqnum
= lsa_seqnum_increment(lsa
);
3167 ospf_lsa_refresh(ospf
, lsa
);
3170 void ospf_lsa_maxage_delete(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
3172 struct route_node
*rn
;
3173 struct prefix lsa_prefix
;
3175 memset(&lsa_prefix
, 0, sizeof(lsa_prefix
));
3176 lsa_prefix
.family
= AF_UNSPEC
;
3177 lsa_prefix
.prefixlen
= sizeof(lsa_prefix
.u
.ptr
) * CHAR_BIT
;
3178 lsa_prefix
.u
.ptr
= (uintptr_t)lsa
;
3180 if ((rn
= route_node_lookup(ospf
->maxage_lsa
, &lsa_prefix
))) {
3181 if (rn
->info
== lsa
) {
3182 UNSET_FLAG(lsa
->flags
, OSPF_LSA_IN_MAXAGE
);
3183 ospf_lsa_unlock(&lsa
); /* maxage_lsa */
3186 rn
); /* unlock node because lsa is deleted */
3188 route_unlock_node(rn
); /* route_node_lookup */
3190 if (IS_DEBUG_OSPF_EVENT
)
3191 zlog_debug("%s: lsa %s is not found in maxage db.",
3192 __func__
, dump_lsa_key(lsa
));
3196 /* Add LSA onto the MaxAge list, and schedule for removal.
3197 * This does *not* lead to the LSA being flooded, that must be taken
3198 * care of elsewhere, see, e.g., ospf_lsa_flush* (which are callers of this
3201 void ospf_lsa_maxage(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
3203 struct prefix lsa_prefix
;
3204 struct route_node
*rn
;
3206 /* When we saw a MaxAge LSA flooded to us, we put it on the list
3207 and schedule the MaxAge LSA remover. */
3208 if (CHECK_FLAG(lsa
->flags
, OSPF_LSA_IN_MAXAGE
)) {
3209 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3211 "LSA[%s]: %p already exists on MaxAge LSA list",
3212 dump_lsa_key(lsa
), lsa
);
3216 memset(&lsa_prefix
, 0, sizeof(lsa_prefix
));
3217 lsa_prefix
.family
= AF_UNSPEC
;
3218 lsa_prefix
.prefixlen
= sizeof(lsa_prefix
.u
.ptr
) * CHAR_BIT
;
3219 lsa_prefix
.u
.ptr
= (uintptr_t)lsa
;
3221 rn
= route_node_get(ospf
->maxage_lsa
, &lsa_prefix
);
3222 if (rn
->info
!= NULL
) {
3223 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3225 "LSA[%s]: found LSA (%p) in table for LSA %p %d",
3226 dump_lsa_key(lsa
), rn
->info
,
3227 (void *)lsa
, lsa_prefix
.prefixlen
);
3228 route_unlock_node(rn
);
3230 rn
->info
= ospf_lsa_lock(lsa
);
3231 SET_FLAG(lsa
->flags
, OSPF_LSA_IN_MAXAGE
);
3234 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3235 zlog_debug("LSA[%s]: MaxAge LSA remover scheduled.",
3238 OSPF_TIMER_ON(ospf
->t_maxage
, ospf_maxage_lsa_remover
,
3239 ospf
->maxage_delay
);
3242 static int ospf_lsa_maxage_walker_remover(struct ospf
*ospf
,
3243 struct ospf_lsa
*lsa
)
3245 /* Stay away from any Local Translated Type-7 LSAs */
3246 if (CHECK_FLAG(lsa
->flags
, OSPF_LSA_LOCAL_XLT
))
3249 if (IS_LSA_MAXAGE(lsa
))
3250 /* Self-originated LSAs should NOT time-out instead,
3251 they're flushed and submitted to the max_age list explicitly.
3253 if (!ospf_lsa_is_self_originated(ospf
, lsa
)) {
3254 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3255 zlog_debug("LSA[%s]: is MaxAge",
3258 switch (lsa
->data
->type
) {
3259 case OSPF_OPAQUE_LINK_LSA
:
3260 case OSPF_OPAQUE_AREA_LSA
:
3261 case OSPF_OPAQUE_AS_LSA
:
3263 * As a general rule, whenever network topology
3265 * (due to an LSA removal in this case), routing
3267 * should be triggered. However, this is not
3269 * LSAs. Even if an opaque LSA instance is going
3271 * from the routing domain, it does not mean a
3273 * topology, and thus, routing recalculation is
3277 case OSPF_AS_EXTERNAL_LSA
:
3278 case OSPF_AS_NSSA_LSA
:
3279 ospf_ase_incremental_update(ospf
, lsa
);
3282 ospf_spf_calculate_schedule(ospf
,
3286 ospf_lsa_maxage(ospf
, lsa
);
3289 if (IS_LSA_MAXAGE(lsa
) && !ospf_lsa_is_self_originated(ospf
, lsa
))
3290 if (LS_AGE(lsa
) > OSPF_LSA_MAXAGE
+ 30)
3291 printf("Eek! Shouldn't happen!\n");
3296 /* Periodical check of MaxAge LSA. */
3297 void ospf_lsa_maxage_walker(struct event
*thread
)
3299 struct ospf
*ospf
= EVENT_ARG(thread
);
3300 struct route_node
*rn
;
3301 struct ospf_lsa
*lsa
;
3302 struct ospf_area
*area
;
3303 struct listnode
*node
, *nnode
;
3305 ospf
->t_maxage_walker
= NULL
;
3307 for (ALL_LIST_ELEMENTS(ospf
->areas
, node
, nnode
, area
)) {
3308 LSDB_LOOP (ROUTER_LSDB(area
), rn
, lsa
)
3309 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3310 LSDB_LOOP (NETWORK_LSDB(area
), rn
, lsa
)
3311 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3312 LSDB_LOOP (SUMMARY_LSDB(area
), rn
, lsa
)
3313 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3314 LSDB_LOOP (ASBR_SUMMARY_LSDB(area
), rn
, lsa
)
3315 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3316 LSDB_LOOP (OPAQUE_AREA_LSDB(area
), rn
, lsa
)
3317 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3318 LSDB_LOOP (OPAQUE_LINK_LSDB(area
), rn
, lsa
)
3319 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3320 LSDB_LOOP (NSSA_LSDB(area
), rn
, lsa
)
3321 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3324 /* for AS-external-LSAs. */
3326 LSDB_LOOP (EXTERNAL_LSDB(ospf
), rn
, lsa
)
3327 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3328 LSDB_LOOP (OPAQUE_AS_LSDB(ospf
), rn
, lsa
)
3329 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3332 OSPF_TIMER_ON(ospf
->t_maxage_walker
, ospf_lsa_maxage_walker
,
3333 OSPF_LSA_MAXAGE_CHECK_INTERVAL
);
3336 struct ospf_lsa
*ospf_lsa_lookup_by_prefix(struct ospf_lsdb
*lsdb
, uint8_t type
,
3337 struct prefix_ipv4
*p
,
3338 struct in_addr router_id
)
3340 struct ospf_lsa
*lsa
;
3341 struct in_addr mask
, id
;
3342 struct lsa_header_mask
{
3343 struct lsa_header header
;
3344 struct in_addr mask
;
3347 lsa
= ospf_lsdb_lookup_by_id(lsdb
, type
, p
->prefix
, router_id
);
3351 masklen2ip(p
->prefixlen
, &mask
);
3353 hmask
= (struct lsa_header_mask
*)lsa
->data
;
3355 if (mask
.s_addr
!= hmask
->mask
.s_addr
) {
3356 id
.s_addr
= p
->prefix
.s_addr
| (~mask
.s_addr
);
3357 lsa
= ospf_lsdb_lookup_by_id(lsdb
, type
, id
, router_id
);
3365 struct ospf_lsa
*ospf_lsa_lookup(struct ospf
*ospf
, struct ospf_area
*area
,
3366 uint32_t type
, struct in_addr id
,
3367 struct in_addr adv_router
)
3373 case OSPF_ROUTER_LSA
:
3374 case OSPF_NETWORK_LSA
:
3375 case OSPF_SUMMARY_LSA
:
3376 case OSPF_ASBR_SUMMARY_LSA
:
3377 case OSPF_AS_NSSA_LSA
:
3378 case OSPF_OPAQUE_LINK_LSA
:
3379 case OSPF_OPAQUE_AREA_LSA
:
3380 return ospf_lsdb_lookup_by_id(area
->lsdb
, type
, id
, adv_router
);
3381 case OSPF_AS_EXTERNAL_LSA
:
3382 case OSPF_OPAQUE_AS_LSA
:
3383 return ospf_lsdb_lookup_by_id(ospf
->lsdb
, type
, id
, adv_router
);
3391 struct ospf_lsa
*ospf_lsa_lookup_by_id(struct ospf_area
*area
, uint32_t type
,
3394 struct ospf_lsa
*lsa
;
3395 struct route_node
*rn
;
3398 case OSPF_ROUTER_LSA
:
3399 return ospf_lsdb_lookup_by_id(area
->lsdb
, type
, id
, id
);
3400 case OSPF_NETWORK_LSA
:
3401 for (rn
= route_top(NETWORK_LSDB(area
)); rn
;
3402 rn
= route_next(rn
))
3403 if ((lsa
= rn
->info
))
3404 if (IPV4_ADDR_SAME(&lsa
->data
->id
, &id
)) {
3405 route_unlock_node(rn
);
3409 case OSPF_SUMMARY_LSA
:
3410 case OSPF_ASBR_SUMMARY_LSA
:
3411 /* Currently not used. */
3413 return ospf_lsdb_lookup_by_id(area
->lsdb
, type
, id
, id
);
3414 case OSPF_AS_EXTERNAL_LSA
:
3415 case OSPF_AS_NSSA_LSA
:
3416 case OSPF_OPAQUE_LINK_LSA
:
3417 case OSPF_OPAQUE_AREA_LSA
:
3418 case OSPF_OPAQUE_AS_LSA
:
3419 /* Currently not used. */
3428 struct ospf_lsa
*ospf_lsa_lookup_by_header(struct ospf_area
*area
,
3429 struct lsa_header
*lsah
)
3431 struct ospf_lsa
*match
;
3434 * Strictly speaking, the LSA-ID field for Opaque-LSAs (type-9/10/11)
3435 * is redefined to have two subfields; opaque-type and opaque-id.
3436 * However, it is harmless to treat the two sub fields together, as if
3437 * they two were forming a unique LSA-ID.
3440 match
= ospf_lsa_lookup(area
->ospf
, area
, lsah
->type
, lsah
->id
,
3444 if (IS_DEBUG_OSPF(lsa
, LSA
) == OSPF_DEBUG_LSA
)
3445 zlog_debug("LSA[Type%d:%pI4]: Lookup by header, NO MATCH",
3446 lsah
->type
, &lsah
->id
);
3451 /* return +n, l1 is more recent.
3452 return -n, l2 is more recent.
3453 return 0, l1 and l2 is identical. */
3454 int ospf_lsa_more_recent(struct ospf_lsa
*l1
, struct ospf_lsa
*l2
)
3459 if (l1
== NULL
&& l2
== NULL
)
3466 /* compare LS sequence number. */
3467 x
= (int)ntohl(l1
->data
->ls_seqnum
);
3468 y
= (int)ntohl(l2
->data
->ls_seqnum
);
3474 /* compare LS checksum. */
3475 r
= ntohs(l1
->data
->checksum
) - ntohs(l2
->data
->checksum
);
3479 /* compare LS age. */
3480 if (IS_LSA_MAXAGE(l1
) && !IS_LSA_MAXAGE(l2
))
3482 else if (!IS_LSA_MAXAGE(l1
) && IS_LSA_MAXAGE(l2
))
3485 /* compare LS age with MaxAgeDiff. */
3486 if (LS_AGE(l1
) - LS_AGE(l2
) > OSPF_LSA_MAXAGE_DIFF
)
3488 else if (LS_AGE(l2
) - LS_AGE(l1
) > OSPF_LSA_MAXAGE_DIFF
)
3491 /* LSAs are identical. */
3496 * Check if two LSAs are different.
3499 * The first LSA to compare.
3502 * The second LSA to compare.
3505 * When set to true, ignore whether the LSAs were received from the network
3506 * or not. This parameter should be set to true when checking for topology
3507 * changes as part of the Graceful Restart helper neighbor procedures.
3510 * true if the LSAs are different, false otherwise.
3512 int ospf_lsa_different(struct ospf_lsa
*l1
, struct ospf_lsa
*l2
,
3513 bool ignore_rcvd_flag
)
3521 if (l1
->data
->options
!= l2
->data
->options
)
3524 if (IS_LSA_MAXAGE(l1
) && !IS_LSA_MAXAGE(l2
))
3527 if (IS_LSA_MAXAGE(l2
) && !IS_LSA_MAXAGE(l1
))
3530 if (l1
->size
!= l2
->size
)
3536 if (!ignore_rcvd_flag
3537 && CHECK_FLAG((l1
->flags
^ l2
->flags
), OSPF_LSA_RECEIVED
))
3538 return 1; /* May be a stale LSA in the LSBD */
3540 if (l1
->size
== OSPF_LSA_HEADER_SIZE
)
3541 return 0; /* nothing to compare */
3543 p1
= (char *)l1
->data
;
3544 p2
= (char *)l2
->data
;
3546 if (memcmp(p1
+ OSPF_LSA_HEADER_SIZE
, p2
+ OSPF_LSA_HEADER_SIZE
,
3547 l1
->size
- OSPF_LSA_HEADER_SIZE
)
3554 int ospf_lsa_flush_schedule(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
3556 if (lsa
== NULL
|| !IS_LSA_SELF(lsa
))
3559 if (IS_DEBUG_OSPF_EVENT
)
3561 "LSA[Type%d:%pI4]: Schedule self-originated LSA to FLUSH",
3562 lsa
->data
->type
, &lsa
->data
->id
);
3564 /* Force given lsa's age to MaxAge. */
3565 lsa
->data
->ls_age
= htons(OSPF_LSA_MAXAGE
);
3567 switch (lsa
->data
->type
) {
3568 /* Opaque wants to be notified of flushes */
3569 case OSPF_OPAQUE_LINK_LSA
:
3570 case OSPF_OPAQUE_AREA_LSA
:
3571 case OSPF_OPAQUE_AS_LSA
:
3572 ospf_opaque_lsa_refresh(lsa
);
3575 ospf_refresher_unregister_lsa(ospf
, lsa
);
3576 ospf_lsa_flush(ospf
, lsa
);
3583 void ospf_flush_self_originated_lsas_now(struct ospf
*ospf
)
3585 struct listnode
*node
, *nnode
;
3586 struct listnode
*node2
, *nnode2
;
3587 struct ospf_area
*area
;
3588 struct ospf_interface
*oi
;
3589 struct ospf_lsa
*lsa
;
3590 struct route_node
*rn
;
3591 struct ospf_if_params
*oip
;
3592 int need_to_flush_ase
= 0;
3594 ospf
->inst_shutdown
= 1;
3596 for (ALL_LIST_ELEMENTS(ospf
->areas
, node
, nnode
, area
)) {
3597 if ((lsa
= area
->router_lsa_self
) != NULL
) {
3598 if (IS_DEBUG_OSPF_EVENT
)
3600 "LSA[Type%d:%pI4]: Schedule self-originated LSA to FLUSH",
3604 ospf_refresher_unregister_lsa(ospf
, lsa
);
3605 ospf_lsa_flush_area(lsa
, area
);
3606 ospf_lsa_unlock(&area
->router_lsa_self
);
3607 area
->router_lsa_self
= NULL
;
3610 for (ALL_LIST_ELEMENTS(area
->oiflist
, node2
, nnode2
, oi
)) {
3611 if ((lsa
= oi
->network_lsa_self
) != NULL
3612 && oi
->state
== ISM_DR
&& oi
->full_nbrs
> 0) {
3613 if (IS_DEBUG_OSPF_EVENT
)
3615 "LSA[Type%d:%pI4]: Schedule self-originated LSA to FLUSH",
3619 ospf_refresher_unregister_lsa(
3620 ospf
, oi
->network_lsa_self
);
3621 ospf_lsa_flush_area(oi
->network_lsa_self
, area
);
3622 ospf_lsa_unlock(&oi
->network_lsa_self
);
3623 oi
->network_lsa_self
= NULL
;
3625 oip
= ospf_lookup_if_params(
3626 oi
->ifp
, oi
->address
->u
.prefix4
);
3628 oip
->network_lsa_seqnum
= htonl(
3629 OSPF_INVALID_SEQUENCE_NUMBER
);
3632 if (oi
->type
!= OSPF_IFTYPE_VIRTUALLINK
3633 && area
->external_routing
== OSPF_AREA_DEFAULT
)
3634 need_to_flush_ase
= 1;
3637 LSDB_LOOP (SUMMARY_LSDB(area
), rn
, lsa
)
3638 ospf_lsa_flush_schedule(ospf
, lsa
);
3639 LSDB_LOOP (ASBR_SUMMARY_LSDB(area
), rn
, lsa
)
3640 ospf_lsa_flush_schedule(ospf
, lsa
);
3641 LSDB_LOOP (OPAQUE_LINK_LSDB(area
), rn
, lsa
)
3642 ospf_lsa_flush_schedule(ospf
, lsa
);
3643 LSDB_LOOP (OPAQUE_AREA_LSDB(area
), rn
, lsa
)
3644 ospf_lsa_flush_schedule(ospf
, lsa
);
3647 if (need_to_flush_ase
) {
3648 LSDB_LOOP (EXTERNAL_LSDB(ospf
), rn
, lsa
)
3649 ospf_lsa_flush_schedule(ospf
, lsa
);
3650 LSDB_LOOP (OPAQUE_AS_LSDB(ospf
), rn
, lsa
)
3651 ospf_lsa_flush_schedule(ospf
, lsa
);
3655 * Make sure that the MaxAge LSA remover is executed immediately,
3656 * without conflicting to other threads.
3658 if (ospf
->t_maxage
!= NULL
) {
3659 EVENT_OFF(ospf
->t_maxage
);
3660 event_execute(master
, ospf_maxage_lsa_remover
, ospf
, 0);
3666 /** @brief Function to refresh all the self originated
3667 * LSAs for area, when FR state change happens.
3668 * @param area pointer.
3671 void ospf_refresh_area_self_lsas(struct ospf_area
*area
)
3673 struct listnode
*node2
;
3674 struct listnode
*nnode2
;
3675 struct ospf_interface
*oi
;
3676 struct route_node
*rn
;
3677 struct ospf_lsa
*lsa
;
3682 if (area
->router_lsa_self
)
3683 ospf_lsa_refresh(area
->ospf
, area
->router_lsa_self
);
3685 for (ALL_LIST_ELEMENTS(area
->oiflist
, node2
, nnode2
, oi
))
3686 if (oi
->network_lsa_self
)
3687 ospf_lsa_refresh(oi
->ospf
, oi
->network_lsa_self
);
3689 LSDB_LOOP (SUMMARY_LSDB(area
), rn
, lsa
)
3690 if (IS_LSA_SELF(lsa
))
3691 ospf_lsa_refresh(area
->ospf
, lsa
);
3692 LSDB_LOOP (ASBR_SUMMARY_LSDB(area
), rn
, lsa
)
3693 if (IS_LSA_SELF(lsa
))
3694 ospf_lsa_refresh(area
->ospf
, lsa
);
3695 LSDB_LOOP (OPAQUE_LINK_LSDB(area
), rn
, lsa
)
3696 if (IS_LSA_SELF(lsa
))
3697 ospf_lsa_refresh(area
->ospf
, lsa
);
3698 LSDB_LOOP (OPAQUE_AREA_LSDB(area
), rn
, lsa
)
3699 if (IS_LSA_SELF(lsa
))
3700 ospf_lsa_refresh(area
->ospf
, lsa
);
3701 LSDB_LOOP (EXTERNAL_LSDB(area
->ospf
), rn
, lsa
)
3702 if (IS_LSA_SELF(lsa
))
3703 ospf_lsa_refresh(area
->ospf
, lsa
);
3704 LSDB_LOOP (OPAQUE_AS_LSDB(area
->ospf
), rn
, lsa
)
3705 if (IS_LSA_SELF(lsa
))
3706 ospf_lsa_refresh(area
->ospf
, lsa
);
3709 /* If there is self-originated LSA, then return 1, otherwise return 0. */
3710 /* An interface-independent version of ospf_lsa_is_self_originated */
3711 int ospf_lsa_is_self_originated(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
3713 struct listnode
*node
;
3714 struct ospf_interface
*oi
;
3716 /* This LSA is already checked. */
3717 if (CHECK_FLAG(lsa
->flags
, OSPF_LSA_SELF_CHECKED
))
3718 return IS_LSA_SELF(lsa
);
3720 /* Make sure LSA is self-checked. */
3721 SET_FLAG(lsa
->flags
, OSPF_LSA_SELF_CHECKED
);
3723 /* AdvRouter and Router ID is the same. */
3724 if (IPV4_ADDR_SAME(&lsa
->data
->adv_router
, &ospf
->router_id
))
3725 SET_FLAG(lsa
->flags
, OSPF_LSA_SELF
);
3727 /* LSA is router-LSA. */
3728 else if (lsa
->data
->type
== OSPF_ROUTER_LSA
3729 && IPV4_ADDR_SAME(&lsa
->data
->id
, &ospf
->router_id
))
3730 SET_FLAG(lsa
->flags
, OSPF_LSA_SELF
);
3732 /* LSA is network-LSA. Compare Link ID with all interfaces. */
3733 else if (lsa
->data
->type
== OSPF_NETWORK_LSA
)
3734 for (ALL_LIST_ELEMENTS_RO(ospf
->oiflist
, node
, oi
)) {
3735 /* Ignore virtual link. */
3736 if (oi
->type
!= OSPF_IFTYPE_VIRTUALLINK
)
3737 if (oi
->address
->family
== AF_INET
)
3740 &oi
->address
->u
.prefix4
)) {
3741 /* to make it easier later */
3742 SET_FLAG(lsa
->flags
,
3744 return IS_LSA_SELF(lsa
);
3748 return IS_LSA_SELF(lsa
);
3751 /* Get unique Link State ID. */
3752 enum lsid_status
ospf_lsa_unique_id(struct ospf
*ospf
, struct ospf_lsdb
*lsdb
,
3753 uint8_t type
, struct prefix_ipv4
*p
,
3756 struct ospf_lsa
*lsa
;
3757 struct in_addr mask
;
3761 /* Check existence of LSA instance. */
3762 lsa
= ospf_lsdb_lookup_by_id(lsdb
, type
, *id
, ospf
->router_id
);
3764 struct as_external_lsa
*al
=
3765 (struct as_external_lsa
*)lsa
->data
;
3766 /* Ref rfc2328,Appendex E.1
3767 * If router already originated the external lsa with lsid
3768 * as the current prefix, and the masklens are same then
3769 * terminate the LSID algorithem.
3771 if (ip_masklen(al
->mask
) == p
->prefixlen
) {
3772 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
3774 "%s: Can't get Link State ID for %pFX",
3776 /* id.s_addr = 0; */
3777 id
->s_addr
= 0xffffffff;
3778 return LSID_NOT_AVAILABLE
;
3779 } else if (ip_masklen(al
->mask
) < p
->prefixlen
) {
3780 /* Ref rfc2328,Appendex E.2
3781 * the current prefix masklen is greater than the
3782 * existing LSA, then generate the Link state ID,
3783 * by setting all host bits in prefix addressa and
3786 * Eg: 1st Route : 10.0.0.0/16 - LSID:10.0.0.0
3787 * 2nd Route : 10.0.0.0/24 - LSID:10.0.0.255
3789 masklen2ip(p
->prefixlen
, &mask
);
3791 id
->s_addr
= p
->prefix
.s_addr
| (~mask
.s_addr
);
3792 lsa
= ospf_lsdb_lookup_by_id(ospf
->lsdb
, type
, *id
,
3795 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
3797 "%s: Can't get Link State ID for %pFX",
3799 id
->s_addr
= 0xffffffff;
3800 return LSID_NOT_AVAILABLE
;
3803 /* Ref rfc2328,Appendex E.3
3804 * the current prefix masklen is lesser than the
3805 * existing LSA,then the originated LSA has to be
3806 * refreshed by modifying masklen, cost and tag.
3807 * Originate the old route info with new LSID by
3808 * setting the host bits in prefix address.
3810 * Eg: 1st Route : 10.0.0.0/24 - LSID:10.0.0.0
3811 * 2nd Route : 10.0.0.0/16 - ?
3812 * Since 2nd route mask len is less than firstone
3813 * LSID has to be changed.
3814 * 1st route LSID:10.0.0.255
3815 * 2nd route LSID:10.0.0.0
3817 id
->s_addr
= lsa
->data
->id
.s_addr
| (~al
->mask
.s_addr
);
3818 lsa
= ospf_lsdb_lookup_by_id(ospf
->lsdb
, type
, *id
,
3820 if (lsa
&& (ip_masklen(al
->mask
) != IPV4_MAX_BITLEN
)) {
3821 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
3823 "%s: Can't get Link State ID for %pFX",
3825 id
->s_addr
= 0xffffffff;
3826 return LSID_NOT_AVAILABLE
;
3832 return LSID_AVAILABLE
;
3836 #define LSA_ACTION_FLOOD_AREA 1
3837 #define LSA_ACTION_FLUSH_AREA 2
3841 struct ospf_area
*area
;
3842 struct ospf_lsa
*lsa
;
3845 static void ospf_lsa_action(struct event
*t
)
3847 struct lsa_action
*data
;
3849 data
= EVENT_ARG(t
);
3851 if (IS_DEBUG_OSPF(lsa
, LSA
) == OSPF_DEBUG_LSA
)
3852 zlog_debug("LSA[Action]: Performing scheduled LSA action: %d",
3855 switch (data
->action
) {
3856 case LSA_ACTION_FLOOD_AREA
:
3857 ospf_flood_through_area(data
->area
, NULL
, data
->lsa
);
3859 case LSA_ACTION_FLUSH_AREA
:
3860 ospf_lsa_flush_area(data
->lsa
, data
->area
);
3864 ospf_lsa_unlock(&data
->lsa
); /* Message */
3865 XFREE(MTYPE_OSPF_MESSAGE
, data
);
3868 void ospf_schedule_lsa_flood_area(struct ospf_area
*area
, struct ospf_lsa
*lsa
)
3870 struct lsa_action
*data
;
3872 data
= XCALLOC(MTYPE_OSPF_MESSAGE
, sizeof(struct lsa_action
));
3873 data
->action
= LSA_ACTION_FLOOD_AREA
;
3875 data
->lsa
= ospf_lsa_lock(lsa
); /* Message / Flood area */
3877 event_add_event(master
, ospf_lsa_action
, data
, 0, NULL
);
3880 void ospf_schedule_lsa_flush_area(struct ospf_area
*area
, struct ospf_lsa
*lsa
)
3882 struct lsa_action
*data
;
3884 data
= XCALLOC(MTYPE_OSPF_MESSAGE
, sizeof(struct lsa_action
));
3885 data
->action
= LSA_ACTION_FLUSH_AREA
;
3887 data
->lsa
= ospf_lsa_lock(lsa
); /* Message / Flush area */
3889 event_add_event(master
, ospf_lsa_action
, data
, 0, NULL
);
3893 /* LSA Refreshment functions. */
3894 struct ospf_lsa
*ospf_lsa_refresh(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
3896 struct external_info
*ei
;
3897 struct ospf_external_aggr_rt
*aggr
;
3898 struct ospf_lsa
*new = NULL
;
3899 struct as_external_lsa
*al
;
3900 struct prefix_ipv4 p
;
3902 assert(CHECK_FLAG(lsa
->flags
, OSPF_LSA_SELF
));
3903 assert(IS_LSA_SELF(lsa
));
3904 assert(lsa
->lock
> 0);
3906 switch (lsa
->data
->type
) {
3907 /* Router and Network LSAs are processed differently. */
3908 case OSPF_ROUTER_LSA
:
3909 new = ospf_router_lsa_refresh(lsa
);
3911 case OSPF_NETWORK_LSA
:
3912 new = ospf_network_lsa_refresh(lsa
);
3914 case OSPF_SUMMARY_LSA
:
3915 new = ospf_summary_lsa_refresh(ospf
, lsa
);
3917 case OSPF_ASBR_SUMMARY_LSA
:
3918 new = ospf_summary_asbr_lsa_refresh(ospf
, lsa
);
3920 case OSPF_AS_EXTERNAL_LSA
:
3921 /* Translated from NSSA Type-5s are refreshed when
3922 * from refresh of Type-7 - do not refresh these directly.
3925 al
= (struct as_external_lsa
*)lsa
->data
;
3927 p
.prefixlen
= ip_masklen(al
->mask
);
3928 p
.prefix
= lsa
->data
->id
;
3930 if (CHECK_FLAG(lsa
->flags
, OSPF_LSA_LOCAL_XLT
))
3932 ei
= ospf_external_info_check(ospf
, lsa
);
3934 new = ospf_external_lsa_refresh(
3935 ospf
, lsa
, ei
, LSA_REFRESH_FORCE
, false);
3937 aggr
= (struct ospf_external_aggr_rt
*)
3938 ospf_extrenal_aggregator_lookup(ospf
, &p
);
3940 struct external_info ei_aggr
;
3942 memset(&ei_aggr
, 0, sizeof(ei_aggr
));
3943 ei_aggr
.p
= aggr
->p
;
3944 ei_aggr
.tag
= aggr
->tag
;
3945 ei_aggr
.instance
= ospf
->instance
;
3946 ei_aggr
.route_map_set
.metric
= -1;
3947 ei_aggr
.route_map_set
.metric_type
= -1;
3949 ospf_external_lsa_refresh(ospf
, lsa
, &ei_aggr
,
3950 LSA_REFRESH_FORCE
, true);
3951 SET_FLAG(aggr
->flags
,
3952 OSPF_EXTERNAL_AGGRT_ORIGINATED
);
3954 ospf_lsa_flush_as(ospf
, lsa
);
3957 case OSPF_OPAQUE_LINK_LSA
:
3958 case OSPF_OPAQUE_AREA_LSA
:
3959 case OSPF_OPAQUE_AS_LSA
:
3960 new = ospf_opaque_lsa_refresh(lsa
);
3968 void ospf_refresher_register_lsa(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
3970 uint16_t index
, current_index
;
3972 assert(lsa
->lock
> 0);
3973 assert(IS_LSA_SELF(lsa
));
3975 if (lsa
->refresh_list
< 0) {
3978 ospf
->lsa_refresh_timer
- (2 * OSPF_LS_REFRESH_JITTER
);
3980 ospf
->lsa_refresh_timer
- OSPF_LS_REFRESH_JITTER
;
3982 /* We want to refresh the LSA within OSPF_LS_REFRESH_TIME which
3984 * 1800s. Use jitter so that we send the LSA sometime between
3988 delay
= (frr_weak_random() % (max_delay
- min_delay
))
3991 current_index
= ospf
->lsa_refresh_queue
.index
3992 + (monotime(NULL
) - ospf
->lsa_refresher_started
)
3993 / OSPF_LSA_REFRESHER_GRANULARITY
;
3995 index
= (current_index
+ delay
/ OSPF_LSA_REFRESHER_GRANULARITY
)
3996 % (OSPF_LSA_REFRESHER_SLOTS
);
3998 if (IS_DEBUG_OSPF(lsa
, LSA_REFRESH
))
4000 "LSA[Refresh:Type%d:%pI4]: age %d, added to index %d",
4001 lsa
->data
->type
, &lsa
->data
->id
,
4002 LS_AGE(lsa
), index
);
4004 if (!ospf
->lsa_refresh_queue
.qs
[index
])
4005 ospf
->lsa_refresh_queue
.qs
[index
] = list_new();
4007 listnode_add(ospf
->lsa_refresh_queue
.qs
[index
],
4008 ospf_lsa_lock(lsa
)); /* lsa_refresh_queue */
4009 lsa
->refresh_list
= index
;
4011 if (IS_DEBUG_OSPF(lsa
, LSA_REFRESH
))
4013 "LSA[Refresh:Type%d:%pI4]: %s: setting refresh_list on lsa %p (slot %d)",
4014 lsa
->data
->type
, &lsa
->data
->id
, __func__
,
4015 (void *)lsa
, index
);
4019 void ospf_refresher_unregister_lsa(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
4021 assert(lsa
->lock
> 0);
4022 assert(IS_LSA_SELF(lsa
));
4023 if (lsa
->refresh_list
>= 0) {
4024 struct list
*refresh_list
=
4025 ospf
->lsa_refresh_queue
.qs
[lsa
->refresh_list
];
4026 listnode_delete(refresh_list
, lsa
);
4027 if (!listcount(refresh_list
)) {
4028 list_delete(&refresh_list
);
4029 ospf
->lsa_refresh_queue
.qs
[lsa
->refresh_list
] = NULL
;
4031 lsa
->refresh_list
= -1;
4032 ospf_lsa_unlock(&lsa
); /* lsa_refresh_queue */
4036 void ospf_lsa_refresh_walker(struct event
*t
)
4038 struct list
*refresh_list
;
4039 struct listnode
*node
, *nnode
;
4040 struct ospf
*ospf
= EVENT_ARG(t
);
4041 struct ospf_lsa
*lsa
;
4043 struct list
*lsa_to_refresh
= list_new();
4046 if (IS_DEBUG_OSPF(lsa
, LSA_REFRESH
))
4047 zlog_debug("LSA[Refresh]: %s: start", __func__
);
4050 i
= ospf
->lsa_refresh_queue
.index
;
4052 /* Note: if clock has jumped backwards, then time change could be
4054 so we are careful to cast the expression to unsigned before taking
4056 ospf
->lsa_refresh_queue
.index
=
4057 ((unsigned long)(ospf
->lsa_refresh_queue
.index
4059 - ospf
->lsa_refresher_started
)
4060 / OSPF_LSA_REFRESHER_GRANULARITY
))
4061 % OSPF_LSA_REFRESHER_SLOTS
;
4063 if (IS_DEBUG_OSPF(lsa
, LSA_REFRESH
))
4064 zlog_debug("LSA[Refresh]: %s: next index %d", __func__
,
4065 ospf
->lsa_refresh_queue
.index
);
4067 for (; i
!= ospf
->lsa_refresh_queue
.index
;
4068 i
= (i
+ 1) % OSPF_LSA_REFRESHER_SLOTS
) {
4069 if (IS_DEBUG_OSPF(lsa
, LSA_REFRESH
))
4070 zlog_debug("LSA[Refresh]: %s: refresh index %d",
4073 refresh_list
= ospf
->lsa_refresh_queue
.qs
[i
];
4077 ospf
->lsa_refresh_queue
.qs
[i
] = NULL
;
4080 for (ALL_LIST_ELEMENTS(refresh_list
, node
, nnode
,
4082 if (IS_DEBUG_OSPF(lsa
, LSA_REFRESH
))
4084 "LSA[Refresh:Type%d:%pI4]: %s: refresh lsa %p (slot %d)",
4085 lsa
->data
->type
, &lsa
->data
->id
,
4086 __func__
, (void *)lsa
, i
);
4088 assert(lsa
->lock
> 0);
4089 list_delete_node(refresh_list
, node
);
4090 lsa
->refresh_list
= -1;
4091 listnode_add(lsa_to_refresh
, lsa
);
4093 list_delete(&refresh_list
);
4097 ospf
->t_lsa_refresher
= NULL
;
4098 event_add_timer(master
, ospf_lsa_refresh_walker
, ospf
,
4099 ospf
->lsa_refresh_interval
, &ospf
->t_lsa_refresher
);
4100 ospf
->lsa_refresher_started
= monotime(NULL
);
4102 for (ALL_LIST_ELEMENTS(lsa_to_refresh
, node
, nnode
, lsa
)) {
4103 dna_lsa
= ospf_check_dna_lsa(lsa
);
4104 if (!dna_lsa
) { /* refresh only non-DNA LSAs */
4105 ospf_lsa_refresh(ospf
, lsa
);
4107 assert(lsa
->lock
> 0);
4108 ospf_lsa_unlock(&lsa
); /* lsa_refresh_queue & temp for
4113 list_delete(&lsa_to_refresh
);
4115 if (IS_DEBUG_OSPF(lsa
, LSA_REFRESH
))
4116 zlog_debug("LSA[Refresh]: %s: end", __func__
);
4119 /* Flush the LSAs for the specific area */
4120 void ospf_flush_lsa_from_area(struct ospf
*ospf
, struct in_addr area_id
,
4123 struct ospf_area
*area
;
4124 struct route_node
*rn
;
4125 struct ospf_lsa
*lsa
;
4127 area
= ospf_area_get(ospf
, area_id
);
4130 case OSPF_AS_EXTERNAL_LSA
:
4131 if ((area
->external_routing
== OSPF_AREA_NSSA
) ||
4132 (area
->external_routing
== OSPF_AREA_STUB
)) {
4133 LSDB_LOOP (EXTERNAL_LSDB(ospf
), rn
, lsa
)
4134 if (IS_LSA_SELF(lsa
) &&
4135 !(CHECK_FLAG(lsa
->flags
,
4136 OSPF_LSA_LOCAL_XLT
)))
4137 ospf_lsa_flush_area(lsa
, area
);
4140 case OSPF_AS_NSSA_LSA
:
4141 LSDB_LOOP (NSSA_LSDB(area
), rn
, lsa
)
4142 if (IS_LSA_SELF(lsa
))
4143 ospf_lsa_flush_area(lsa
, area
);