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 thread
*t
)
747 struct ospf_area
*area
= THREAD_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;
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 ((new = ospf_lsa_translated_nssa_new(ospf
, type7
)) == NULL
) {
2035 if (IS_DEBUG_OSPF_NSSA
)
2037 "%s: Could not translate Type-7, Id %pI4, to Type-5",
2038 __func__
, &type7
->data
->id
);
2042 extnew
= (struct as_external_lsa
*)new->data
;
2044 /* Update LSA sequence number from translated Type-5 LSA */
2046 new->data
->ls_seqnum
= lsa_seqnum_increment(type5
);
2048 if ((new = ospf_lsa_install(ospf
, NULL
, new)) == NULL
) {
2049 flog_warn(EC_OSPF_LSA_INSTALL_FAILURE
,
2050 "%s: Could not install LSA id %pI4", __func__
,
2055 if (IS_DEBUG_OSPF_NSSA
) {
2056 zlog_debug("%s: translated Type 7, installed", __func__
);
2057 ospf_lsa_header_dump(new->data
);
2058 zlog_debug(" Network mask: %d", ip_masklen(extnew
->mask
));
2059 zlog_debug(" Forward addr: %pI4",
2060 &extnew
->e
[0].fwd_addr
);
2063 ospf
->lsa_originate_count
++;
2064 ospf_flood_through_as(ospf
, NULL
, new);
2069 /* Refresh Translated from NSSA AS-external-LSA. */
2070 struct ospf_lsa
*ospf_translated_nssa_refresh(struct ospf
*ospf
,
2071 struct ospf_lsa
*type7
,
2072 struct ospf_lsa
*type5
)
2074 struct ospf_lsa
*new = NULL
;
2075 struct as_external_lsa
*extold
= NULL
;
2076 uint32_t ls_seqnum
= 0;
2078 /* Sanity checks. */
2079 assert(type7
|| type5
);
2080 if (!(type7
|| type5
))
2083 assert(type7
->data
);
2085 assert(type5
->data
);
2086 assert(ospf
->anyNSSA
);
2088 /* get required data according to what has been given */
2089 if (type7
&& type5
== NULL
) {
2090 /* find the translated Type-5 for this Type-7 */
2091 struct as_external_lsa
*ext
=
2092 (struct as_external_lsa
*)(type7
->data
);
2093 struct prefix_ipv4 p
= {
2094 .prefix
= type7
->data
->id
,
2095 .prefixlen
= ip_masklen(ext
->mask
),
2099 type5
= ospf_external_info_find_lsa(ospf
, &p
);
2100 } else if (type5
&& type7
== NULL
) {
2101 /* find the type-7 from which supplied type-5 was translated,
2102 * ie find first type-7 with same LSA Id.
2104 struct listnode
*ln
, *lnn
;
2105 struct route_node
*rn
;
2106 struct ospf_lsa
*lsa
;
2107 struct ospf_area
*area
;
2109 for (ALL_LIST_ELEMENTS(ospf
->areas
, ln
, lnn
, area
)) {
2110 if (area
->external_routing
!= OSPF_AREA_NSSA
&& !type7
)
2113 LSDB_LOOP (NSSA_LSDB(area
), rn
, lsa
) {
2114 if (lsa
->data
->id
.s_addr
2115 == type5
->data
->id
.s_addr
) {
2123 /* do we have type7? */
2125 if (IS_DEBUG_OSPF_NSSA
)
2126 zlog_debug("%s: no Type-7 found for Type-5 LSA Id %pI4",
2127 __func__
, &type5
->data
->id
);
2131 /* do we have valid translated type5? */
2132 if (type5
== NULL
|| !CHECK_FLAG(type5
->flags
, OSPF_LSA_LOCAL_XLT
)) {
2133 if (IS_DEBUG_OSPF_NSSA
)
2135 "%s: No translated Type-5 found for Type-7 with Id %pI4",
2136 __func__
, &type7
->data
->id
);
2140 extold
= (struct as_external_lsa
*)type5
->data
;
2141 if (type7
->area
->suppress_fa
== 1) {
2142 if (extold
->e
[0].fwd_addr
.s_addr
== 0)
2143 ls_seqnum
= ntohl(type5
->data
->ls_seqnum
);
2146 /* Delete LSA from neighbor retransmit-list. */
2147 ospf_ls_retransmit_delete_nbr_as(ospf
, type5
);
2149 /* create new translated LSA */
2150 if ((new = ospf_lsa_translated_nssa_new(ospf
, type7
)) == NULL
) {
2151 if (IS_DEBUG_OSPF_NSSA
)
2153 "%s: Could not translate Type-7 for %pI4 to Type-5",
2154 __func__
, &type7
->data
->id
);
2158 if (type7
->area
->suppress_fa
== 1) {
2159 if (extold
->e
[0].fwd_addr
.s_addr
== 0)
2160 new->data
->ls_seqnum
= htonl(ls_seqnum
+ 1);
2163 if (!(new = ospf_lsa_install(ospf
, NULL
, new))) {
2164 flog_warn(EC_OSPF_LSA_INSTALL_FAILURE
,
2165 "%s: Could not install translated LSA, Id %pI4",
2166 __func__
, &type7
->data
->id
);
2170 /* Flood LSA through area. */
2171 ospf_flood_through_as(ospf
, NULL
, new);
2176 /* Originate an AS-external-LSA, install and flood. */
2177 struct ospf_lsa
*ospf_external_lsa_originate(struct ospf
*ospf
,
2178 struct external_info
*ei
)
2180 struct ospf_lsa
*new;
2182 if (ospf
->gr_info
.restart_in_progress
) {
2183 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
2185 "LSA[Type5]: Graceful Restart in progress, don't originate");
2189 /* Added for NSSA project....
2191 External LSAs are originated in ASBRs as usual, but for NSSA
2193 there is the global Type-5 LSDB and a Type-7 LSDB installed for
2194 every area. The Type-7's are flooded to every IR and every ABR; We
2195 install the Type-5 LSDB so that the normal "refresh" code operates
2196 as usual, and flag them as not used during ASE calculations. The
2197 Type-7 LSDB is used for calculations. Each Type-7 has a Forwarding
2198 Address of non-zero.
2200 If an ABR is the elected NSSA translator, following SPF and during
2201 the ABR task it will translate all the scanned Type-7's, with P-bit
2202 ON and not-self generated, and translate to Type-5's throughout the
2205 A difference in operation depends whether this ASBR is an ABR
2206 or not. If not an ABR, the P-bit is ON, to indicate that any
2207 elected NSSA-ABR can perform its translation.
2209 If an ABR, the P-bit is OFF; No ABR will perform translation and
2210 this ASBR will flood the Type-5 LSA as usual.
2212 For the case where this ASBR is not an ABR, the ASE calculations
2213 are based on the Type-5 LSDB; The Type-7 LSDB exists just to
2214 demonstrate to the user that there are LSA's that belong to any
2217 Finally, it just so happens that when the ABR is translating every
2218 Type-7 into Type-5, it installs it into the Type-5 LSDB as an
2219 approved Type-5 (translated from Type-7); at the end of translation
2220 if any Translated Type-5's remain unapproved, then they must be
2221 flushed from the AS.
2225 if (ospf
->router_id
.s_addr
== INADDR_ANY
) {
2226 if (ei
&& IS_DEBUG_OSPF_EVENT
)
2228 "LSA[Type5:%pI4]: deferring AS-external-LSA origination, router ID is zero",
2233 /* Create new AS-external-LSA instance. */
2234 if ((new = ospf_external_lsa_new(ospf
, ei
, NULL
)) == NULL
) {
2235 if (ei
&& IS_DEBUG_OSPF_EVENT
)
2237 "LSA[Type5:%pI4]: Could not originate AS-external-LSA",
2242 /* Install newly created LSA into Type-5 LSDB, lock = 1. */
2243 ospf_lsa_install(ospf
, NULL
, new);
2245 /* Update LSA origination count. */
2246 ospf
->lsa_originate_count
++;
2248 /* Flooding new LSA. only to AS (non-NSSA/STUB) */
2249 ospf_flood_through_as(ospf
, NULL
, new);
2251 /* If there is any attached NSSA, do special handling */
2252 if (ospf
->anyNSSA
&&
2253 /* stay away from translated LSAs! */
2254 !(CHECK_FLAG(new->flags
, OSPF_LSA_LOCAL_XLT
)))
2255 ospf_install_flood_nssa(
2256 ospf
, new, ei
); /* Install/Flood Type-7 to all NSSAs */
2258 /* Debug logging. */
2259 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
)) {
2260 zlog_debug("LSA[Type%d:%pI4]: Originate AS-external-LSA %p",
2261 new->data
->type
, &new->data
->id
,
2263 ospf_lsa_header_dump(new->data
);
2269 static struct external_info
*ospf_default_external_info(struct ospf
*ospf
)
2272 struct prefix_ipv4 p
;
2273 struct external_info
*default_ei
;
2277 p
.prefix
.s_addr
= 0;
2280 default_ei
= ospf_external_info_lookup(ospf
, DEFAULT_ROUTE
, 0, &p
);
2284 /* First, lookup redistributed default route. */
2285 for (type
= 0; type
<= ZEBRA_ROUTE_MAX
; type
++) {
2286 struct list
*ext_list
;
2288 if (type
== ZEBRA_ROUTE_OSPF
)
2291 ext_list
= ospf
->external
[type
];
2295 ret
= ospf_external_default_routemap_apply_walk(ospf
, ext_list
,
2304 void ospf_external_lsa_rid_change(struct ospf
*ospf
)
2306 struct external_info
*ei
;
2307 struct ospf_external_aggr_rt
*aggr
;
2308 struct ospf_lsa
*lsa
= NULL
;
2312 for (type
= 0; type
< ZEBRA_ROUTE_MAX
; type
++) {
2313 struct route_node
*rn
;
2314 struct route_table
*rt
;
2315 struct list
*ext_list
;
2316 struct listnode
*node
;
2317 struct ospf_external
*ext
;
2319 ext_list
= ospf
->external
[type
];
2323 for (ALL_LIST_ELEMENTS_RO(ext_list
, node
, ext
)) {
2324 /* Originate As-external-LSA from all type of
2325 * distribute source.
2327 rt
= ext
->external_info
;
2331 for (rn
= route_top(rt
); rn
; rn
= route_next(rn
)) {
2337 if (is_default_prefix4(&ei
->p
))
2340 lsa
= ospf_external_info_find_lsa(ospf
, &ei
->p
);
2342 aggr
= ospf_external_aggr_match(ospf
, &ei
->p
);
2345 if (!ospf_redistribute_check(ospf
, ei
,
2349 if (IS_DEBUG_OSPF(lsa
, EXTNL_LSA_AGGR
))
2351 "Originate Summary LSA after reset/router-ID change");
2353 /* Here the LSA is originated as new */
2354 ospf_originate_summary_lsa(ospf
, aggr
,
2357 /* LSA needs to be refreshed even if
2358 * there is no change in the route
2359 * params if the LSA is in maxage.
2361 if (IS_LSA_MAXAGE(lsa
))
2362 force
= LSA_REFRESH_FORCE
;
2364 force
= LSA_REFRESH_IF_CHANGED
;
2366 ospf_external_lsa_refresh(ospf
, lsa
,
2369 if (!ospf_redistribute_check(ospf
, ei
,
2373 if (!ospf_external_lsa_originate(ospf
,
2376 EC_OSPF_LSA_INSTALL_FAILURE
,
2377 "LSA: AS-external-LSA was not originated.");
2383 ei
= ospf_default_external_info(ospf
);
2384 if (ei
&& !ospf_external_lsa_originate(ospf
, ei
)) {
2385 flog_warn(EC_OSPF_LSA_INSTALL_FAILURE
,
2386 "LSA: AS-external-LSA for default route was not originated.");
2390 /* Flush any NSSA LSAs for given prefix */
2391 void ospf_nssa_lsa_flush(struct ospf
*ospf
, struct prefix_ipv4
*p
)
2393 struct listnode
*node
, *nnode
;
2394 struct ospf_lsa
*lsa
= NULL
;
2395 struct ospf_area
*area
;
2397 for (ALL_LIST_ELEMENTS(ospf
->areas
, node
, nnode
, area
)) {
2398 if (area
->external_routing
== OSPF_AREA_NSSA
) {
2399 lsa
= ospf_lsa_lookup(ospf
, area
, OSPF_AS_NSSA_LSA
,
2400 p
->prefix
, ospf
->router_id
);
2402 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
2404 "LSA: There is no such AS-NSSA-LSA %pFX in LSDB",
2408 ospf_ls_retransmit_delete_nbr_area(area
, lsa
);
2409 if (!IS_LSA_MAXAGE(lsa
)) {
2410 ospf_refresher_unregister_lsa(ospf
, lsa
);
2411 ospf_lsa_flush_area(lsa
, area
);
2417 /* Flush an AS-external-LSA from LSDB and routing domain. */
2418 void ospf_external_lsa_flush(struct ospf
*ospf
, uint8_t type
,
2419 struct prefix_ipv4
*p
,
2420 ifindex_t ifindex
/*, struct in_addr nexthop */)
2422 struct ospf_lsa
*lsa
;
2424 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
2425 zlog_debug("LSA: Flushing AS-external-LSA %pFX", p
);
2427 /* First lookup LSA from LSDB. */
2428 if (!(lsa
= ospf_external_info_find_lsa(ospf
, p
))) {
2429 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
2431 "LSA: There is no such AS-external-LSA %pFX in LSDB",
2436 /* If LSA is selforiginated, not a translated LSA, and there is
2437 * NSSA area, flush Type-7 LSA's at first.
2439 if (IS_LSA_SELF(lsa
) && (ospf
->anyNSSA
)
2440 && !(CHECK_FLAG(lsa
->flags
, OSPF_LSA_LOCAL_XLT
)))
2441 ospf_nssa_lsa_flush(ospf
, p
);
2443 if (!IS_LSA_MAXAGE(lsa
)) {
2444 /* Sweep LSA from Link State Retransmit List. */
2445 ospf_ls_retransmit_delete_nbr_as(ospf
, lsa
);
2447 /* Unregister LSA from Refresh queue. */
2448 ospf_refresher_unregister_lsa(ospf
, lsa
);
2450 /* Flush AS-external-LSA through AS. */
2451 ospf_lsa_flush_as(ospf
, lsa
);
2454 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
2455 zlog_debug("%s: stop", __func__
);
2458 void ospf_external_lsa_refresh_default(struct ospf
*ospf
)
2460 struct prefix_ipv4 p
;
2461 struct external_info
*ei
;
2462 struct ospf_lsa
*lsa
;
2466 p
.prefix
.s_addr
= INADDR_ANY
;
2468 ei
= ospf_default_external_info(ospf
);
2469 lsa
= ospf_external_info_find_lsa(ospf
, &p
);
2472 if (IS_DEBUG_OSPF_EVENT
)
2473 zlog_debug("LSA[Type5:0.0.0.0]: Refresh AS-external-LSA %p",
2475 ospf_external_lsa_refresh(ospf
, lsa
, ei
, LSA_REFRESH_FORCE
,
2477 } else if (ei
&& !lsa
) {
2478 if (IS_DEBUG_OSPF_EVENT
)
2480 "LSA[Type5:0.0.0.0]: Originate AS-external-LSA");
2481 ospf_external_lsa_originate(ospf
, ei
);
2483 if (IS_DEBUG_OSPF_EVENT
)
2484 zlog_debug("LSA[Type5:0.0.0.0]: Flush AS-external-LSA");
2485 ospf_external_lsa_flush(ospf
, DEFAULT_ROUTE
, &p
, 0);
2489 void ospf_external_lsa_refresh_type(struct ospf
*ospf
, uint8_t type
,
2490 unsigned short instance
, int force
)
2492 struct route_node
*rn
;
2493 struct external_info
*ei
;
2494 struct ospf_external
*ext
;
2496 if (type
== DEFAULT_ROUTE
)
2499 ext
= ospf_external_lookup(ospf
, type
, instance
);
2501 if (ext
&& EXTERNAL_INFO(ext
)) {
2502 /* Refresh each redistributed AS-external-LSAs. */
2503 for (rn
= route_top(EXTERNAL_INFO(ext
)); rn
;
2504 rn
= route_next(rn
)) {
2507 if (!is_default_prefix4(&ei
->p
)) {
2508 struct ospf_lsa
*lsa
;
2509 struct ospf_external_aggr_rt
*aggr
;
2511 aggr
= ospf_external_aggr_match(ospf
,
2513 lsa
= ospf_external_info_find_lsa(
2516 /* Check the AS-external-LSA
2517 * should be originated.
2519 if (!ospf_redistribute_check(
2522 ospf_unlink_ei_from_aggr(
2531 "%s: Send Aggreate LSA (%pFX)",
2535 ospf_originate_summary_lsa(
2540 if (IS_LSA_MAXAGE(lsa
))
2541 force
= LSA_REFRESH_FORCE
;
2543 ospf_external_lsa_refresh(
2544 ospf
, lsa
, ei
, force
,
2547 if (!ospf_redistribute_check(
2550 ospf_external_lsa_originate(
2559 /* Refresh AS-external-LSA. */
2560 struct ospf_lsa
*ospf_external_lsa_refresh(struct ospf
*ospf
,
2561 struct ospf_lsa
*lsa
,
2562 struct external_info
*ei
, int force
,
2565 struct ospf_lsa
*new;
2568 /* Check the AS-external-LSA should be originated. */
2570 if (!ospf_redistribute_check(ospf
, ei
, &changed
)) {
2571 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
2573 "LSA[Type%d:%pI4] Could not be refreshed, redist check fail",
2577 ospf_external_lsa_flush(ospf
, ei
->type
, &ei
->p
,
2578 ei
->ifindex
/*, ei->nexthop */);
2582 if (!changed
&& !force
) {
2583 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
2585 "LSA[Type%d:%pI4]: Not refreshed, not changed/forced",
2586 lsa
->data
->type
, &lsa
->data
->id
);
2590 /* Delete LSA from neighbor retransmit-list. */
2591 ospf_ls_retransmit_delete_nbr_as(ospf
, lsa
);
2593 /* Unregister AS-external-LSA from refresh-list. */
2594 ospf_refresher_unregister_lsa(ospf
, lsa
);
2596 new = ospf_external_lsa_new(ospf
, ei
, &lsa
->data
->id
);
2599 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
2600 zlog_debug("LSA[Type%d:%pI4]: Could not be refreshed",
2601 lsa
->data
->type
, &lsa
->data
->id
);
2605 new->data
->ls_seqnum
= lsa_seqnum_increment(lsa
);
2607 ospf_lsa_install(ospf
, NULL
, new); /* As type-5. */
2609 /* Flood LSA through AS. */
2610 ospf_flood_through_as(ospf
, NULL
, new);
2612 /* If any attached NSSA, install as Type-7, flood to all NSSA Areas */
2613 if (ospf
->anyNSSA
&& !(CHECK_FLAG(new->flags
, OSPF_LSA_LOCAL_XLT
)))
2614 ospf_install_flood_nssa(ospf
, new,
2615 ei
); /* Install/Flood per new rules */
2617 /* Register self-originated LSA to refresh queue.
2618 * Translated LSAs should not be registered, but refreshed upon
2619 * refresh of the Type-7
2621 if (!CHECK_FLAG(new->flags
, OSPF_LSA_LOCAL_XLT
))
2622 ospf_refresher_register_lsa(ospf
, new);
2624 /* Debug logging. */
2625 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
)) {
2626 zlog_debug("LSA[Type%d:%pI4]: AS-external-LSA refresh",
2627 new->data
->type
, &new->data
->id
);
2628 ospf_lsa_header_dump(new->data
);
2635 /* LSA installation functions. */
2637 /* Install router-LSA to an area. */
2638 static struct ospf_lsa
*
2639 ospf_router_lsa_install(struct ospf
*ospf
, struct ospf_lsa
*new, int rt_recalc
)
2641 struct ospf_area
*area
= new->area
;
2643 /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs
2644 The entire routing table must be recalculated, starting with
2645 the shortest path calculations for each area (not just the
2646 area whose link-state database has changed).
2649 if (IS_LSA_SELF(new)) {
2651 /* Only install LSA if it is originated/refreshed by us.
2652 * If LSA was received by flooding, the RECEIVED flag is set so
2654 * not link the LSA */
2655 if (CHECK_FLAG(new->flags
, OSPF_LSA_RECEIVED
))
2656 return new; /* ignore stale LSA */
2658 /* Set self-originated router-LSA. */
2659 ospf_lsa_unlock(&area
->router_lsa_self
);
2660 area
->router_lsa_self
= ospf_lsa_lock(new);
2662 ospf_refresher_register_lsa(ospf
, new);
2665 ospf_spf_calculate_schedule(ospf
, SPF_FLAG_ROUTER_LSA_INSTALL
);
2669 /* Install network-LSA to an area. */
2670 static struct ospf_lsa
*ospf_network_lsa_install(struct ospf
*ospf
,
2671 struct ospf_interface
*oi
,
2672 struct ospf_lsa
*new,
2676 /* RFC 2328 Section 13.2 Router-LSAs and network-LSAs
2677 The entire routing table must be recalculated, starting with
2678 the shortest path calculations for each area (not just the
2679 area whose link-state database has changed).
2681 if (IS_LSA_SELF(new)) {
2682 /* We supposed that when LSA is originated by us, we pass the
2684 for which it was originated. If LSA was received by flooding,
2685 the RECEIVED flag is set, so we do not link the LSA to the
2687 if (CHECK_FLAG(new->flags
, OSPF_LSA_RECEIVED
))
2688 return new; /* ignore stale LSA */
2690 ospf_lsa_unlock(&oi
->network_lsa_self
);
2691 oi
->network_lsa_self
= ospf_lsa_lock(new);
2692 ospf_refresher_register_lsa(ospf
, new);
2695 ospf_spf_calculate_schedule(ospf
, SPF_FLAG_NETWORK_LSA_INSTALL
);
2700 /* Install summary-LSA to an area. */
2701 static struct ospf_lsa
*
2702 ospf_summary_lsa_install(struct ospf
*ospf
, struct ospf_lsa
*new, int rt_recalc
)
2704 if (rt_recalc
&& !IS_LSA_SELF(new)) {
2705 /* RFC 2328 Section 13.2 Summary-LSAs
2706 The best route to the destination described by the summary-
2707 LSA must be recalculated (see Section 16.5). If this
2708 destination is an AS boundary router, it may also be
2709 necessary to re-examine all the AS-external-LSAs.
2712 ospf_spf_calculate_schedule(ospf
, SPF_FLAG_SUMMARY_LSA_INSTALL
);
2715 if (IS_LSA_SELF(new))
2716 ospf_refresher_register_lsa(ospf
, new);
2721 /* Install ASBR-summary-LSA to an area. */
2722 static struct ospf_lsa
*ospf_summary_asbr_lsa_install(struct ospf
*ospf
,
2723 struct ospf_lsa
*new,
2726 if (rt_recalc
&& !IS_LSA_SELF(new)) {
2727 /* RFC 2328 Section 13.2 Summary-LSAs
2728 The best route to the destination described by the summary-
2729 LSA must be recalculated (see Section 16.5). If this
2730 destination is an AS boundary router, it may also be
2731 necessary to re-examine all the AS-external-LSAs.
2733 ospf_spf_calculate_schedule(ospf
,
2734 SPF_FLAG_ASBR_SUMMARY_LSA_INSTALL
);
2737 /* register LSA to refresh-list. */
2738 if (IS_LSA_SELF(new))
2739 ospf_refresher_register_lsa(ospf
, new);
2744 /* Install AS-external-LSA. */
2745 static struct ospf_lsa
*ospf_external_lsa_install(struct ospf
*ospf
,
2746 struct ospf_lsa
*new,
2749 ospf_ase_register_external_lsa(new, ospf
);
2750 /* If LSA is not self-originated, calculate an external route. */
2752 /* RFC 2328 Section 13.2 AS-external-LSAs
2753 The best route to the destination described by the AS-
2754 external-LSA must be recalculated (see Section 16.6).
2757 if (!IS_LSA_SELF(new))
2758 ospf_ase_incremental_update(ospf
, new);
2761 if (new->data
->type
== OSPF_AS_NSSA_LSA
) {
2762 /* There is no point to register selforiginate Type-7 LSA for
2763 * refreshing. We rely on refreshing Type-5 LSA's
2765 if (IS_LSA_SELF(new))
2768 /* Try refresh type-5 translated LSA for this LSA, if
2770 * New translations will be taken care of by the
2773 ospf_translated_nssa_refresh(ospf
, new, NULL
);
2774 ospf_schedule_abr_task(ospf
);
2778 /* Register self-originated LSA to refresh queue.
2779 * Leave Translated LSAs alone if NSSA is enabled
2781 if (IS_LSA_SELF(new) && !CHECK_FLAG(new->flags
, OSPF_LSA_LOCAL_XLT
))
2782 ospf_refresher_register_lsa(ospf
, new);
2787 void ospf_discard_from_db(struct ospf
*ospf
, struct ospf_lsdb
*lsdb
,
2788 struct ospf_lsa
*lsa
)
2790 struct ospf_lsa
*old
;
2795 old
= ospf_lsdb_lookup(lsdb
, lsa
);
2800 if (old
->refresh_list
>= 0)
2801 ospf_refresher_unregister_lsa(ospf
, old
);
2803 switch (old
->data
->type
) {
2804 case OSPF_AS_EXTERNAL_LSA
:
2805 ospf_ase_unregister_external_lsa(old
, ospf
);
2806 ospf_ls_retransmit_delete_nbr_as(ospf
, old
);
2808 case OSPF_OPAQUE_AS_LSA
:
2809 ospf_ls_retransmit_delete_nbr_as(ospf
, old
);
2811 case OSPF_AS_NSSA_LSA
:
2812 ospf_ls_retransmit_delete_nbr_area(old
->area
, old
);
2813 ospf_ase_unregister_external_lsa(old
, ospf
);
2816 ospf_ls_retransmit_delete_nbr_area(old
->area
, old
);
2820 ospf_lsa_maxage_delete(ospf
, old
);
2821 ospf_lsa_discard(old
);
2824 struct ospf_lsa
*ospf_lsa_install(struct ospf
*ospf
, struct ospf_interface
*oi
,
2825 struct ospf_lsa
*lsa
)
2827 struct ospf_lsa
*new = NULL
;
2828 struct ospf_lsa
*old
= NULL
;
2829 struct ospf_lsdb
*lsdb
= NULL
;
2833 switch (lsa
->data
->type
) {
2835 case OSPF_AS_NSSA_LSA
:
2837 lsdb
= lsa
->area
->lsdb
;
2841 case OSPF_AS_EXTERNAL_LSA
:
2842 case OSPF_OPAQUE_AS_LSA
:
2847 lsdb
= lsa
->area
->lsdb
;
2853 /* RFC 2328 13.2. Installing LSAs in the database
2855 Installing a new LSA in the database, either as the result of
2856 flooding or a newly self-originated LSA, may cause the OSPF
2857 routing table structure to be recalculated. The contents of the
2858 new LSA should be compared to the old instance, if present. If
2859 there is no difference, there is no need to recalculate the
2860 routing table. When comparing an LSA to its previous instance,
2861 the following are all considered to be differences in contents:
2863 o The LSA's Options field has changed.
2865 o One of the LSA instances has LS age set to MaxAge, and
2868 o The length field in the LSA header has changed.
2870 o The body of the LSA (i.e., anything outside the 20-byte
2871 LSA header) has changed. Note that this excludes changes
2872 in LS Sequence Number and LS Checksum.
2875 /* Look up old LSA and determine if any SPF calculation or incremental
2877 old
= ospf_lsdb_lookup(lsdb
, lsa
);
2879 /* Do comparison and record if recalc needed. */
2881 if (old
== NULL
|| ospf_lsa_different(old
, lsa
, false)) {
2882 /* Ref rfc3623 section 3.2.3
2883 * Installing new lsa or change in the existing LSA
2884 * or flushing existing LSA leads to topo change
2885 * and trigger SPF caculation.
2886 * So, router should be aborted from HELPER role
2887 * if it is detected as TOPO change.
2889 if (ospf
->active_restarter_cnt
&&
2890 CHECK_LSA_TYPE_1_TO_5_OR_7(lsa
->data
->type
)) {
2891 if (old
== NULL
|| ospf_lsa_different(old
, lsa
, true))
2892 ospf_helper_handle_topo_chg(ospf
, lsa
);
2899 Sequence number check (Section 14.1 of rfc 2328)
2900 "Premature aging is used when it is time for a self-originated
2901 LSA's sequence number field to wrap. At this point, the current
2902 LSA instance (having LS sequence number MaxSequenceNumber) must
2903 be prematurely aged and flushed from the routing domain before a
2904 new instance with sequence number equal to InitialSequenceNumber
2905 can be originated. "
2908 if (ntohl(lsa
->data
->ls_seqnum
) - 1 == OSPF_MAX_SEQUENCE_NUMBER
) {
2909 if (ospf_lsa_is_self_originated(ospf
, lsa
)) {
2910 lsa
->data
->ls_seqnum
= htonl(OSPF_MAX_SEQUENCE_NUMBER
);
2912 if (!IS_LSA_MAXAGE(lsa
))
2913 lsa
->flags
|= OSPF_LSA_PREMATURE_AGE
;
2914 lsa
->data
->ls_age
= htons(OSPF_LSA_MAXAGE
);
2916 if (IS_DEBUG_OSPF(lsa
, LSA_REFRESH
)) {
2918 "%s() Premature Aging lsa %p, seqnum 0x%x",
2920 ntohl(lsa
->data
->ls_seqnum
));
2921 ospf_lsa_header_dump(lsa
->data
);
2924 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
)) {
2926 "%s() got an lsa with seq 0x80000000 that was not self originated. Ignoring",
2928 ospf_lsa_header_dump(lsa
->data
);
2934 /* discard old LSA from LSDB */
2936 ospf_discard_from_db(ospf
, lsdb
, lsa
);
2938 /* Calculate Checksum if self-originated?. */
2939 if (IS_LSA_SELF(lsa
))
2940 ospf_lsa_checksum(lsa
->data
);
2942 /* Insert LSA to LSDB. */
2943 ospf_lsdb_add(lsdb
, lsa
);
2946 /* Do LSA specific installation process. */
2947 switch (lsa
->data
->type
) {
2948 case OSPF_ROUTER_LSA
:
2949 new = ospf_router_lsa_install(ospf
, lsa
, rt_recalc
);
2951 case OSPF_NETWORK_LSA
:
2953 new = ospf_network_lsa_install(ospf
, oi
, lsa
, rt_recalc
);
2955 case OSPF_SUMMARY_LSA
:
2956 new = ospf_summary_lsa_install(ospf
, lsa
, rt_recalc
);
2958 case OSPF_ASBR_SUMMARY_LSA
:
2959 new = ospf_summary_asbr_lsa_install(ospf
, lsa
, rt_recalc
);
2961 case OSPF_AS_EXTERNAL_LSA
:
2962 new = ospf_external_lsa_install(ospf
, lsa
, rt_recalc
);
2964 case OSPF_OPAQUE_LINK_LSA
:
2965 if (IS_LSA_SELF(lsa
))
2966 lsa
->oi
= oi
; /* Specify outgoing ospf-interface for
2969 /* Incoming "oi" for this LSA has set at LSUpd
2973 case OSPF_OPAQUE_AREA_LSA
:
2974 case OSPF_OPAQUE_AS_LSA
:
2975 new = ospf_opaque_lsa_install(lsa
, rt_recalc
);
2977 case OSPF_AS_NSSA_LSA
:
2978 new = ospf_external_lsa_install(ospf
, lsa
, rt_recalc
);
2979 default: /* type-6,8,9....nothing special */
2984 return new; /* Installation failed, cannot proceed further --
2988 if (IS_DEBUG_OSPF(lsa
, LSA_INSTALL
)) {
2989 switch (lsa
->data
->type
) {
2990 case OSPF_AS_EXTERNAL_LSA
:
2991 case OSPF_OPAQUE_AS_LSA
:
2992 case OSPF_AS_NSSA_LSA
:
2993 zlog_debug("LSA[%s]: Install %s", dump_lsa_key(new),
2994 lookup_msg(ospf_lsa_type_msg
,
2995 new->data
->type
, NULL
));
2998 zlog_debug("LSA[%s]: Install %s to Area %pI4",
3000 lookup_msg(ospf_lsa_type_msg
,
3001 new->data
->type
, NULL
),
3002 &new->area
->area_id
);
3008 If received LSA' ls_age is MaxAge, or lsa is being prematurely aged
3009 (it's getting flushed out of the area), set LSA on MaxAge LSA list.
3011 if (IS_LSA_MAXAGE(new)) {
3012 if (IS_DEBUG_OSPF(lsa
, LSA_INSTALL
))
3013 zlog_debug("LSA[%s]: Install LSA %p, MaxAge",
3014 dump_lsa_key(new), lsa
);
3015 ospf_lsa_maxage(ospf
, lsa
);
3022 int ospf_check_nbr_status(struct ospf
*ospf
)
3024 struct listnode
*node
, *nnode
;
3025 struct ospf_interface
*oi
;
3027 for (ALL_LIST_ELEMENTS(ospf
->oiflist
, node
, nnode
, oi
)) {
3028 struct route_node
*rn
;
3029 struct ospf_neighbor
*nbr
;
3031 if (ospf_if_is_enable(oi
))
3032 for (rn
= route_top(oi
->nbrs
); rn
; rn
= route_next(rn
))
3033 if ((nbr
= rn
->info
) != NULL
)
3034 if (nbr
->state
== NSM_Exchange
3035 || nbr
->state
== NSM_Loading
) {
3036 route_unlock_node(rn
);
3045 void ospf_maxage_lsa_remover(struct thread
*thread
)
3047 struct ospf
*ospf
= THREAD_ARG(thread
);
3048 struct ospf_lsa
*lsa
, *old
;
3049 struct route_node
*rn
;
3052 ospf
->t_maxage
= NULL
;
3054 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3055 zlog_debug("LSA[MaxAge]: remover Start");
3057 reschedule
= !ospf_check_nbr_status(ospf
);
3060 for (rn
= route_top(ospf
->maxage_lsa
); rn
;
3061 rn
= route_next(rn
)) {
3062 if ((lsa
= rn
->info
) == NULL
) {
3066 /* There is at least one neighbor from which we still
3068 * for that LSA, so we are not allowed to remove it from
3070 * as per RFC 2328 section 14 para 4 a) */
3071 if (lsa
->retransmit_counter
> 0) {
3076 /* TODO: maybe convert this function to a work-queue */
3077 if (thread_should_yield(thread
)) {
3078 OSPF_TIMER_ON(ospf
->t_maxage
,
3079 ospf_maxage_lsa_remover
, 0);
3081 rn
); /* route_top/route_next */
3085 /* Remove LSA from the LSDB */
3086 if (IS_LSA_SELF(lsa
))
3087 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3089 "LSA[Type%d:%pI4]: LSA 0x%lx is self-originated: ",
3092 (unsigned long)lsa
);
3094 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3096 "LSA[%s]: MaxAge LSA removed from list",
3099 if (CHECK_FLAG(lsa
->flags
, OSPF_LSA_PREMATURE_AGE
)) {
3100 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3102 "originating new lsa for lsa %p",
3104 ospf_lsa_refresh(ospf
, lsa
);
3107 /* Remove from lsdb. */
3109 old
= ospf_lsdb_lookup(lsa
->lsdb
, lsa
);
3110 /* The max age LSA here must be the same
3111 * as the LSA in LSDB
3114 flog_err(EC_OSPF_LSA_MISSING
,
3115 "%s: LSA[%s]: LSA not in LSDB",
3116 __func__
, dump_lsa_key(lsa
));
3120 ospf_discard_from_db(ospf
, lsa
->lsdb
, lsa
);
3121 ospf_lsdb_delete(lsa
->lsdb
, lsa
);
3123 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3125 "%s: LSA[%s]: No associated LSDB!",
3126 __func__
, dump_lsa_key(lsa
));
3130 /* A MaxAge LSA must be removed immediately from the router's link
3131 state database as soon as both a) it is no longer contained on any
3132 neighbor Link state retransmission lists and b) none of the
3134 neighbors are in states Exchange or Loading. */
3136 OSPF_TIMER_ON(ospf
->t_maxage
, ospf_maxage_lsa_remover
,
3137 ospf
->maxage_delay
);
3140 /* This function checks whether an LSA with initial sequence number should be
3141 * originated after a wrap in sequence number
3143 void ospf_check_and_gen_init_seq_lsa(struct ospf_interface
*oi
,
3144 struct ospf_lsa
*recv_lsa
)
3146 struct ospf_lsa
*lsa
= NULL
;
3147 struct ospf
*ospf
= oi
->ospf
;
3149 lsa
= ospf_lsa_lookup_by_header(oi
->area
, recv_lsa
->data
);
3151 if ((lsa
== NULL
) || (!CHECK_FLAG(lsa
->flags
, OSPF_LSA_PREMATURE_AGE
))
3152 || (lsa
->retransmit_counter
!= 0)) {
3153 if (IS_DEBUG_OSPF(lsa
, LSA
))
3155 "Do not generate LSA with initial seqence number.");
3159 ospf_lsa_maxage_delete(ospf
, lsa
);
3161 lsa
->data
->ls_seqnum
= lsa_seqnum_increment(lsa
);
3163 ospf_lsa_refresh(ospf
, lsa
);
3166 void ospf_lsa_maxage_delete(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
3168 struct route_node
*rn
;
3169 struct prefix lsa_prefix
;
3171 memset(&lsa_prefix
, 0, sizeof(lsa_prefix
));
3172 lsa_prefix
.family
= AF_UNSPEC
;
3173 lsa_prefix
.prefixlen
= sizeof(lsa_prefix
.u
.ptr
) * CHAR_BIT
;
3174 lsa_prefix
.u
.ptr
= (uintptr_t)lsa
;
3176 if ((rn
= route_node_lookup(ospf
->maxage_lsa
, &lsa_prefix
))) {
3177 if (rn
->info
== lsa
) {
3178 UNSET_FLAG(lsa
->flags
, OSPF_LSA_IN_MAXAGE
);
3179 ospf_lsa_unlock(&lsa
); /* maxage_lsa */
3182 rn
); /* unlock node because lsa is deleted */
3184 route_unlock_node(rn
); /* route_node_lookup */
3186 if (IS_DEBUG_OSPF_EVENT
)
3187 zlog_debug("%s: lsa %s is not found in maxage db.",
3188 __func__
, dump_lsa_key(lsa
));
3192 /* Add LSA onto the MaxAge list, and schedule for removal.
3193 * This does *not* lead to the LSA being flooded, that must be taken
3194 * care of elsewhere, see, e.g., ospf_lsa_flush* (which are callers of this
3197 void ospf_lsa_maxage(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
3199 struct prefix lsa_prefix
;
3200 struct route_node
*rn
;
3202 /* When we saw a MaxAge LSA flooded to us, we put it on the list
3203 and schedule the MaxAge LSA remover. */
3204 if (CHECK_FLAG(lsa
->flags
, OSPF_LSA_IN_MAXAGE
)) {
3205 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3207 "LSA[%s]: %p already exists on MaxAge LSA list",
3208 dump_lsa_key(lsa
), lsa
);
3212 memset(&lsa_prefix
, 0, sizeof(lsa_prefix
));
3213 lsa_prefix
.family
= AF_UNSPEC
;
3214 lsa_prefix
.prefixlen
= sizeof(lsa_prefix
.u
.ptr
) * CHAR_BIT
;
3215 lsa_prefix
.u
.ptr
= (uintptr_t)lsa
;
3217 rn
= route_node_get(ospf
->maxage_lsa
, &lsa_prefix
);
3218 if (rn
->info
!= NULL
) {
3219 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3221 "LSA[%s]: found LSA (%p) in table for LSA %p %d",
3222 dump_lsa_key(lsa
), rn
->info
,
3223 (void *)lsa
, lsa_prefix
.prefixlen
);
3224 route_unlock_node(rn
);
3226 rn
->info
= ospf_lsa_lock(lsa
);
3227 SET_FLAG(lsa
->flags
, OSPF_LSA_IN_MAXAGE
);
3230 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3231 zlog_debug("LSA[%s]: MaxAge LSA remover scheduled.",
3234 OSPF_TIMER_ON(ospf
->t_maxage
, ospf_maxage_lsa_remover
,
3235 ospf
->maxage_delay
);
3238 static int ospf_lsa_maxage_walker_remover(struct ospf
*ospf
,
3239 struct ospf_lsa
*lsa
)
3241 /* Stay away from any Local Translated Type-7 LSAs */
3242 if (CHECK_FLAG(lsa
->flags
, OSPF_LSA_LOCAL_XLT
))
3245 if (IS_LSA_MAXAGE(lsa
))
3246 /* Self-originated LSAs should NOT time-out instead,
3247 they're flushed and submitted to the max_age list explicitly.
3249 if (!ospf_lsa_is_self_originated(ospf
, lsa
)) {
3250 if (IS_DEBUG_OSPF(lsa
, LSA_FLOODING
))
3251 zlog_debug("LSA[%s]: is MaxAge",
3254 switch (lsa
->data
->type
) {
3255 case OSPF_OPAQUE_LINK_LSA
:
3256 case OSPF_OPAQUE_AREA_LSA
:
3257 case OSPF_OPAQUE_AS_LSA
:
3259 * As a general rule, whenever network topology
3261 * (due to an LSA removal in this case), routing
3263 * should be triggered. However, this is not
3265 * LSAs. Even if an opaque LSA instance is going
3267 * from the routing domain, it does not mean a
3269 * topology, and thus, routing recalculation is
3273 case OSPF_AS_EXTERNAL_LSA
:
3274 case OSPF_AS_NSSA_LSA
:
3275 ospf_ase_incremental_update(ospf
, lsa
);
3278 ospf_spf_calculate_schedule(ospf
,
3282 ospf_lsa_maxage(ospf
, lsa
);
3285 if (IS_LSA_MAXAGE(lsa
) && !ospf_lsa_is_self_originated(ospf
, lsa
))
3286 if (LS_AGE(lsa
) > OSPF_LSA_MAXAGE
+ 30)
3287 printf("Eek! Shouldn't happen!\n");
3292 /* Periodical check of MaxAge LSA. */
3293 void ospf_lsa_maxage_walker(struct thread
*thread
)
3295 struct ospf
*ospf
= THREAD_ARG(thread
);
3296 struct route_node
*rn
;
3297 struct ospf_lsa
*lsa
;
3298 struct ospf_area
*area
;
3299 struct listnode
*node
, *nnode
;
3301 ospf
->t_maxage_walker
= NULL
;
3303 for (ALL_LIST_ELEMENTS(ospf
->areas
, node
, nnode
, area
)) {
3304 LSDB_LOOP (ROUTER_LSDB(area
), rn
, lsa
)
3305 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3306 LSDB_LOOP (NETWORK_LSDB(area
), rn
, lsa
)
3307 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3308 LSDB_LOOP (SUMMARY_LSDB(area
), rn
, lsa
)
3309 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3310 LSDB_LOOP (ASBR_SUMMARY_LSDB(area
), rn
, lsa
)
3311 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3312 LSDB_LOOP (OPAQUE_AREA_LSDB(area
), rn
, lsa
)
3313 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3314 LSDB_LOOP (OPAQUE_LINK_LSDB(area
), rn
, lsa
)
3315 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3316 LSDB_LOOP (NSSA_LSDB(area
), rn
, lsa
)
3317 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3320 /* for AS-external-LSAs. */
3322 LSDB_LOOP (EXTERNAL_LSDB(ospf
), rn
, lsa
)
3323 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3324 LSDB_LOOP (OPAQUE_AS_LSDB(ospf
), rn
, lsa
)
3325 ospf_lsa_maxage_walker_remover(ospf
, lsa
);
3328 OSPF_TIMER_ON(ospf
->t_maxage_walker
, ospf_lsa_maxage_walker
,
3329 OSPF_LSA_MAXAGE_CHECK_INTERVAL
);
3332 struct ospf_lsa
*ospf_lsa_lookup_by_prefix(struct ospf_lsdb
*lsdb
, uint8_t type
,
3333 struct prefix_ipv4
*p
,
3334 struct in_addr router_id
)
3336 struct ospf_lsa
*lsa
;
3337 struct in_addr mask
, id
;
3338 struct lsa_header_mask
{
3339 struct lsa_header header
;
3340 struct in_addr mask
;
3343 lsa
= ospf_lsdb_lookup_by_id(lsdb
, type
, p
->prefix
, router_id
);
3347 masklen2ip(p
->prefixlen
, &mask
);
3349 hmask
= (struct lsa_header_mask
*)lsa
->data
;
3351 if (mask
.s_addr
!= hmask
->mask
.s_addr
) {
3352 id
.s_addr
= p
->prefix
.s_addr
| (~mask
.s_addr
);
3353 lsa
= ospf_lsdb_lookup_by_id(lsdb
, type
, id
, router_id
);
3361 struct ospf_lsa
*ospf_lsa_lookup(struct ospf
*ospf
, struct ospf_area
*area
,
3362 uint32_t type
, struct in_addr id
,
3363 struct in_addr adv_router
)
3369 case OSPF_ROUTER_LSA
:
3370 case OSPF_NETWORK_LSA
:
3371 case OSPF_SUMMARY_LSA
:
3372 case OSPF_ASBR_SUMMARY_LSA
:
3373 case OSPF_AS_NSSA_LSA
:
3374 case OSPF_OPAQUE_LINK_LSA
:
3375 case OSPF_OPAQUE_AREA_LSA
:
3376 return ospf_lsdb_lookup_by_id(area
->lsdb
, type
, id
, adv_router
);
3377 case OSPF_AS_EXTERNAL_LSA
:
3378 case OSPF_OPAQUE_AS_LSA
:
3379 return ospf_lsdb_lookup_by_id(ospf
->lsdb
, type
, id
, adv_router
);
3387 struct ospf_lsa
*ospf_lsa_lookup_by_id(struct ospf_area
*area
, uint32_t type
,
3390 struct ospf_lsa
*lsa
;
3391 struct route_node
*rn
;
3394 case OSPF_ROUTER_LSA
:
3395 return ospf_lsdb_lookup_by_id(area
->lsdb
, type
, id
, id
);
3396 case OSPF_NETWORK_LSA
:
3397 for (rn
= route_top(NETWORK_LSDB(area
)); rn
;
3398 rn
= route_next(rn
))
3399 if ((lsa
= rn
->info
))
3400 if (IPV4_ADDR_SAME(&lsa
->data
->id
, &id
)) {
3401 route_unlock_node(rn
);
3405 case OSPF_SUMMARY_LSA
:
3406 case OSPF_ASBR_SUMMARY_LSA
:
3407 /* Currently not used. */
3409 return ospf_lsdb_lookup_by_id(area
->lsdb
, type
, id
, id
);
3410 case OSPF_AS_EXTERNAL_LSA
:
3411 case OSPF_AS_NSSA_LSA
:
3412 case OSPF_OPAQUE_LINK_LSA
:
3413 case OSPF_OPAQUE_AREA_LSA
:
3414 case OSPF_OPAQUE_AS_LSA
:
3415 /* Currently not used. */
3424 struct ospf_lsa
*ospf_lsa_lookup_by_header(struct ospf_area
*area
,
3425 struct lsa_header
*lsah
)
3427 struct ospf_lsa
*match
;
3430 * Strictly speaking, the LSA-ID field for Opaque-LSAs (type-9/10/11)
3431 * is redefined to have two subfields; opaque-type and opaque-id.
3432 * However, it is harmless to treat the two sub fields together, as if
3433 * they two were forming a unique LSA-ID.
3436 match
= ospf_lsa_lookup(area
->ospf
, area
, lsah
->type
, lsah
->id
,
3440 if (IS_DEBUG_OSPF(lsa
, LSA
) == OSPF_DEBUG_LSA
)
3441 zlog_debug("LSA[Type%d:%pI4]: Lookup by header, NO MATCH",
3442 lsah
->type
, &lsah
->id
);
3447 /* return +n, l1 is more recent.
3448 return -n, l2 is more recent.
3449 return 0, l1 and l2 is identical. */
3450 int ospf_lsa_more_recent(struct ospf_lsa
*l1
, struct ospf_lsa
*l2
)
3455 if (l1
== NULL
&& l2
== NULL
)
3462 /* compare LS sequence number. */
3463 x
= (int)ntohl(l1
->data
->ls_seqnum
);
3464 y
= (int)ntohl(l2
->data
->ls_seqnum
);
3470 /* compare LS checksum. */
3471 r
= ntohs(l1
->data
->checksum
) - ntohs(l2
->data
->checksum
);
3475 /* compare LS age. */
3476 if (IS_LSA_MAXAGE(l1
) && !IS_LSA_MAXAGE(l2
))
3478 else if (!IS_LSA_MAXAGE(l1
) && IS_LSA_MAXAGE(l2
))
3481 /* compare LS age with MaxAgeDiff. */
3482 if (LS_AGE(l1
) - LS_AGE(l2
) > OSPF_LSA_MAXAGE_DIFF
)
3484 else if (LS_AGE(l2
) - LS_AGE(l1
) > OSPF_LSA_MAXAGE_DIFF
)
3487 /* LSAs are identical. */
3492 * Check if two LSAs are different.
3495 * The first LSA to compare.
3498 * The second LSA to compare.
3501 * When set to true, ignore whether the LSAs were received from the network
3502 * or not. This parameter should be set to true when checking for topology
3503 * changes as part of the Graceful Restart helper neighbor procedures.
3506 * true if the LSAs are different, false otherwise.
3508 int ospf_lsa_different(struct ospf_lsa
*l1
, struct ospf_lsa
*l2
,
3509 bool ignore_rcvd_flag
)
3517 if (l1
->data
->options
!= l2
->data
->options
)
3520 if (IS_LSA_MAXAGE(l1
) && !IS_LSA_MAXAGE(l2
))
3523 if (IS_LSA_MAXAGE(l2
) && !IS_LSA_MAXAGE(l1
))
3526 if (l1
->size
!= l2
->size
)
3532 if (!ignore_rcvd_flag
3533 && CHECK_FLAG((l1
->flags
^ l2
->flags
), OSPF_LSA_RECEIVED
))
3534 return 1; /* May be a stale LSA in the LSBD */
3536 if (l1
->size
== OSPF_LSA_HEADER_SIZE
)
3537 return 0; /* nothing to compare */
3539 p1
= (char *)l1
->data
;
3540 p2
= (char *)l2
->data
;
3542 if (memcmp(p1
+ OSPF_LSA_HEADER_SIZE
, p2
+ OSPF_LSA_HEADER_SIZE
,
3543 l1
->size
- OSPF_LSA_HEADER_SIZE
)
3550 int ospf_lsa_flush_schedule(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
3552 if (lsa
== NULL
|| !IS_LSA_SELF(lsa
))
3555 if (IS_DEBUG_OSPF_EVENT
)
3557 "LSA[Type%d:%pI4]: Schedule self-originated LSA to FLUSH",
3558 lsa
->data
->type
, &lsa
->data
->id
);
3560 /* Force given lsa's age to MaxAge. */
3561 lsa
->data
->ls_age
= htons(OSPF_LSA_MAXAGE
);
3563 switch (lsa
->data
->type
) {
3564 /* Opaque wants to be notified of flushes */
3565 case OSPF_OPAQUE_LINK_LSA
:
3566 case OSPF_OPAQUE_AREA_LSA
:
3567 case OSPF_OPAQUE_AS_LSA
:
3568 ospf_opaque_lsa_refresh(lsa
);
3571 ospf_refresher_unregister_lsa(ospf
, lsa
);
3572 ospf_lsa_flush(ospf
, lsa
);
3579 void ospf_flush_self_originated_lsas_now(struct ospf
*ospf
)
3581 struct listnode
*node
, *nnode
;
3582 struct listnode
*node2
, *nnode2
;
3583 struct ospf_area
*area
;
3584 struct ospf_interface
*oi
;
3585 struct ospf_lsa
*lsa
;
3586 struct route_node
*rn
;
3587 struct ospf_if_params
*oip
;
3588 int need_to_flush_ase
= 0;
3590 ospf
->inst_shutdown
= 1;
3592 for (ALL_LIST_ELEMENTS(ospf
->areas
, node
, nnode
, area
)) {
3593 if ((lsa
= area
->router_lsa_self
) != NULL
) {
3594 if (IS_DEBUG_OSPF_EVENT
)
3596 "LSA[Type%d:%pI4]: Schedule self-originated LSA to FLUSH",
3600 ospf_refresher_unregister_lsa(ospf
, lsa
);
3601 ospf_lsa_flush_area(lsa
, area
);
3602 ospf_lsa_unlock(&area
->router_lsa_self
);
3603 area
->router_lsa_self
= NULL
;
3606 for (ALL_LIST_ELEMENTS(area
->oiflist
, node2
, nnode2
, oi
)) {
3607 if ((lsa
= oi
->network_lsa_self
) != NULL
3608 && oi
->state
== ISM_DR
&& oi
->full_nbrs
> 0) {
3609 if (IS_DEBUG_OSPF_EVENT
)
3611 "LSA[Type%d:%pI4]: Schedule self-originated LSA to FLUSH",
3615 ospf_refresher_unregister_lsa(
3616 ospf
, oi
->network_lsa_self
);
3617 ospf_lsa_flush_area(oi
->network_lsa_self
, area
);
3618 ospf_lsa_unlock(&oi
->network_lsa_self
);
3619 oi
->network_lsa_self
= NULL
;
3621 oip
= ospf_lookup_if_params(
3622 oi
->ifp
, oi
->address
->u
.prefix4
);
3624 oip
->network_lsa_seqnum
= htonl(
3625 OSPF_INVALID_SEQUENCE_NUMBER
);
3628 if (oi
->type
!= OSPF_IFTYPE_VIRTUALLINK
3629 && area
->external_routing
== OSPF_AREA_DEFAULT
)
3630 need_to_flush_ase
= 1;
3633 LSDB_LOOP (SUMMARY_LSDB(area
), rn
, lsa
)
3634 ospf_lsa_flush_schedule(ospf
, lsa
);
3635 LSDB_LOOP (ASBR_SUMMARY_LSDB(area
), rn
, lsa
)
3636 ospf_lsa_flush_schedule(ospf
, lsa
);
3637 LSDB_LOOP (OPAQUE_LINK_LSDB(area
), rn
, lsa
)
3638 ospf_lsa_flush_schedule(ospf
, lsa
);
3639 LSDB_LOOP (OPAQUE_AREA_LSDB(area
), rn
, lsa
)
3640 ospf_lsa_flush_schedule(ospf
, lsa
);
3643 if (need_to_flush_ase
) {
3644 LSDB_LOOP (EXTERNAL_LSDB(ospf
), rn
, lsa
)
3645 ospf_lsa_flush_schedule(ospf
, lsa
);
3646 LSDB_LOOP (OPAQUE_AS_LSDB(ospf
), rn
, lsa
)
3647 ospf_lsa_flush_schedule(ospf
, lsa
);
3651 * Make sure that the MaxAge LSA remover is executed immediately,
3652 * without conflicting to other threads.
3654 if (ospf
->t_maxage
!= NULL
) {
3655 THREAD_OFF(ospf
->t_maxage
);
3656 thread_execute(master
, ospf_maxage_lsa_remover
, ospf
, 0);
3662 /** @brief Function to refresh all the self originated
3663 * LSAs for area, when FR state change happens.
3664 * @param area pointer.
3667 void ospf_refresh_area_self_lsas(struct ospf_area
*area
)
3669 struct listnode
*node2
;
3670 struct listnode
*nnode2
;
3671 struct ospf_interface
*oi
;
3672 struct route_node
*rn
;
3673 struct ospf_lsa
*lsa
;
3678 if (area
->router_lsa_self
)
3679 ospf_lsa_refresh(area
->ospf
, area
->router_lsa_self
);
3681 for (ALL_LIST_ELEMENTS(area
->oiflist
, node2
, nnode2
, oi
))
3682 if (oi
->network_lsa_self
)
3683 ospf_lsa_refresh(oi
->ospf
, oi
->network_lsa_self
);
3685 LSDB_LOOP (SUMMARY_LSDB(area
), rn
, lsa
)
3686 if (IS_LSA_SELF(lsa
))
3687 ospf_lsa_refresh(area
->ospf
, lsa
);
3688 LSDB_LOOP (ASBR_SUMMARY_LSDB(area
), rn
, lsa
)
3689 if (IS_LSA_SELF(lsa
))
3690 ospf_lsa_refresh(area
->ospf
, lsa
);
3691 LSDB_LOOP (OPAQUE_LINK_LSDB(area
), rn
, lsa
)
3692 if (IS_LSA_SELF(lsa
))
3693 ospf_lsa_refresh(area
->ospf
, lsa
);
3694 LSDB_LOOP (OPAQUE_AREA_LSDB(area
), rn
, lsa
)
3695 if (IS_LSA_SELF(lsa
))
3696 ospf_lsa_refresh(area
->ospf
, lsa
);
3697 LSDB_LOOP (EXTERNAL_LSDB(area
->ospf
), rn
, lsa
)
3698 if (IS_LSA_SELF(lsa
))
3699 ospf_lsa_refresh(area
->ospf
, lsa
);
3700 LSDB_LOOP (OPAQUE_AS_LSDB(area
->ospf
), rn
, lsa
)
3701 if (IS_LSA_SELF(lsa
))
3702 ospf_lsa_refresh(area
->ospf
, lsa
);
3705 /* If there is self-originated LSA, then return 1, otherwise return 0. */
3706 /* An interface-independent version of ospf_lsa_is_self_originated */
3707 int ospf_lsa_is_self_originated(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
3709 struct listnode
*node
;
3710 struct ospf_interface
*oi
;
3712 /* This LSA is already checked. */
3713 if (CHECK_FLAG(lsa
->flags
, OSPF_LSA_SELF_CHECKED
))
3714 return IS_LSA_SELF(lsa
);
3716 /* Make sure LSA is self-checked. */
3717 SET_FLAG(lsa
->flags
, OSPF_LSA_SELF_CHECKED
);
3719 /* AdvRouter and Router ID is the same. */
3720 if (IPV4_ADDR_SAME(&lsa
->data
->adv_router
, &ospf
->router_id
))
3721 SET_FLAG(lsa
->flags
, OSPF_LSA_SELF
);
3723 /* LSA is router-LSA. */
3724 else if (lsa
->data
->type
== OSPF_ROUTER_LSA
3725 && IPV4_ADDR_SAME(&lsa
->data
->id
, &ospf
->router_id
))
3726 SET_FLAG(lsa
->flags
, OSPF_LSA_SELF
);
3728 /* LSA is network-LSA. Compare Link ID with all interfaces. */
3729 else if (lsa
->data
->type
== OSPF_NETWORK_LSA
)
3730 for (ALL_LIST_ELEMENTS_RO(ospf
->oiflist
, node
, oi
)) {
3731 /* Ignore virtual link. */
3732 if (oi
->type
!= OSPF_IFTYPE_VIRTUALLINK
)
3733 if (oi
->address
->family
== AF_INET
)
3736 &oi
->address
->u
.prefix4
)) {
3737 /* to make it easier later */
3738 SET_FLAG(lsa
->flags
,
3740 return IS_LSA_SELF(lsa
);
3744 return IS_LSA_SELF(lsa
);
3747 /* Get unique Link State ID. */
3748 enum lsid_status
ospf_lsa_unique_id(struct ospf
*ospf
, struct ospf_lsdb
*lsdb
,
3749 uint8_t type
, struct prefix_ipv4
*p
,
3752 struct ospf_lsa
*lsa
;
3753 struct in_addr mask
;
3757 /* Check existence of LSA instance. */
3758 lsa
= ospf_lsdb_lookup_by_id(lsdb
, type
, *id
, ospf
->router_id
);
3760 struct as_external_lsa
*al
=
3761 (struct as_external_lsa
*)lsa
->data
;
3762 /* Ref rfc2328,Appendex E.1
3763 * If router already originated the external lsa with lsid
3764 * as the current prefix, and the masklens are same then
3765 * terminate the LSID algorithem.
3767 if (ip_masklen(al
->mask
) == p
->prefixlen
) {
3768 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
3770 "%s: Can't get Link State ID for %pFX",
3772 /* id.s_addr = 0; */
3773 id
->s_addr
= 0xffffffff;
3774 return LSID_NOT_AVAILABLE
;
3775 } else if (ip_masklen(al
->mask
) < p
->prefixlen
) {
3776 /* Ref rfc2328,Appendex E.2
3777 * the current prefix masklen is greater than the
3778 * existing LSA, then generate the Link state ID,
3779 * by setting all host bits in prefix addressa and
3782 * Eg: 1st Route : 10.0.0.0/16 - LSID:10.0.0.0
3783 * 2nd Route : 10.0.0.0/24 - LSID:10.0.0.255
3785 masklen2ip(p
->prefixlen
, &mask
);
3787 id
->s_addr
= p
->prefix
.s_addr
| (~mask
.s_addr
);
3788 lsa
= ospf_lsdb_lookup_by_id(ospf
->lsdb
, type
, *id
,
3791 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
3793 "%s: Can't get Link State ID for %pFX",
3795 id
->s_addr
= 0xffffffff;
3796 return LSID_NOT_AVAILABLE
;
3799 /* Ref rfc2328,Appendex E.3
3800 * the current prefix masklen is lesser than the
3801 * existing LSA,then the originated LSA has to be
3802 * refreshed by modifying masklen, cost and tag.
3803 * Originate the old route info with new LSID by
3804 * setting the host bits in prefix address.
3806 * Eg: 1st Route : 10.0.0.0/24 - LSID:10.0.0.0
3807 * 2nd Route : 10.0.0.0/16 - ?
3808 * Since 2nd route mask len is less than firstone
3809 * LSID has to be changed.
3810 * 1st route LSID:10.0.0.255
3811 * 2nd route LSID:10.0.0.0
3813 id
->s_addr
= lsa
->data
->id
.s_addr
| (~al
->mask
.s_addr
);
3814 lsa
= ospf_lsdb_lookup_by_id(ospf
->lsdb
, type
, *id
,
3816 if (lsa
&& (ip_masklen(al
->mask
) != IPV4_MAX_BITLEN
)) {
3817 if (IS_DEBUG_OSPF(lsa
, LSA_GENERATE
))
3819 "%s: Can't get Link State ID for %pFX",
3821 id
->s_addr
= 0xffffffff;
3822 return LSID_NOT_AVAILABLE
;
3828 return LSID_AVAILABLE
;
3832 #define LSA_ACTION_FLOOD_AREA 1
3833 #define LSA_ACTION_FLUSH_AREA 2
3837 struct ospf_area
*area
;
3838 struct ospf_lsa
*lsa
;
3841 static void ospf_lsa_action(struct thread
*t
)
3843 struct lsa_action
*data
;
3845 data
= THREAD_ARG(t
);
3847 if (IS_DEBUG_OSPF(lsa
, LSA
) == OSPF_DEBUG_LSA
)
3848 zlog_debug("LSA[Action]: Performing scheduled LSA action: %d",
3851 switch (data
->action
) {
3852 case LSA_ACTION_FLOOD_AREA
:
3853 ospf_flood_through_area(data
->area
, NULL
, data
->lsa
);
3855 case LSA_ACTION_FLUSH_AREA
:
3856 ospf_lsa_flush_area(data
->lsa
, data
->area
);
3860 ospf_lsa_unlock(&data
->lsa
); /* Message */
3861 XFREE(MTYPE_OSPF_MESSAGE
, data
);
3864 void ospf_schedule_lsa_flood_area(struct ospf_area
*area
, struct ospf_lsa
*lsa
)
3866 struct lsa_action
*data
;
3868 data
= XCALLOC(MTYPE_OSPF_MESSAGE
, sizeof(struct lsa_action
));
3869 data
->action
= LSA_ACTION_FLOOD_AREA
;
3871 data
->lsa
= ospf_lsa_lock(lsa
); /* Message / Flood area */
3873 thread_add_event(master
, ospf_lsa_action
, data
, 0, NULL
);
3876 void ospf_schedule_lsa_flush_area(struct ospf_area
*area
, struct ospf_lsa
*lsa
)
3878 struct lsa_action
*data
;
3880 data
= XCALLOC(MTYPE_OSPF_MESSAGE
, sizeof(struct lsa_action
));
3881 data
->action
= LSA_ACTION_FLUSH_AREA
;
3883 data
->lsa
= ospf_lsa_lock(lsa
); /* Message / Flush area */
3885 thread_add_event(master
, ospf_lsa_action
, data
, 0, NULL
);
3889 /* LSA Refreshment functions. */
3890 struct ospf_lsa
*ospf_lsa_refresh(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
3892 struct external_info
*ei
;
3893 struct ospf_external_aggr_rt
*aggr
;
3894 struct ospf_lsa
*new = NULL
;
3895 struct as_external_lsa
*al
;
3896 struct prefix_ipv4 p
;
3898 assert(CHECK_FLAG(lsa
->flags
, OSPF_LSA_SELF
));
3899 assert(IS_LSA_SELF(lsa
));
3900 assert(lsa
->lock
> 0);
3902 switch (lsa
->data
->type
) {
3903 /* Router and Network LSAs are processed differently. */
3904 case OSPF_ROUTER_LSA
:
3905 new = ospf_router_lsa_refresh(lsa
);
3907 case OSPF_NETWORK_LSA
:
3908 new = ospf_network_lsa_refresh(lsa
);
3910 case OSPF_SUMMARY_LSA
:
3911 new = ospf_summary_lsa_refresh(ospf
, lsa
);
3913 case OSPF_ASBR_SUMMARY_LSA
:
3914 new = ospf_summary_asbr_lsa_refresh(ospf
, lsa
);
3916 case OSPF_AS_EXTERNAL_LSA
:
3917 /* Translated from NSSA Type-5s are refreshed when
3918 * from refresh of Type-7 - do not refresh these directly.
3921 al
= (struct as_external_lsa
*)lsa
->data
;
3923 p
.prefixlen
= ip_masklen(al
->mask
);
3924 p
.prefix
= lsa
->data
->id
;
3926 if (CHECK_FLAG(lsa
->flags
, OSPF_LSA_LOCAL_XLT
))
3928 ei
= ospf_external_info_check(ospf
, lsa
);
3930 new = ospf_external_lsa_refresh(
3931 ospf
, lsa
, ei
, LSA_REFRESH_FORCE
, false);
3933 aggr
= (struct ospf_external_aggr_rt
*)
3934 ospf_extrenal_aggregator_lookup(ospf
, &p
);
3936 struct external_info ei_aggr
;
3938 memset(&ei_aggr
, 0, sizeof(ei_aggr
));
3939 ei_aggr
.p
= aggr
->p
;
3940 ei_aggr
.tag
= aggr
->tag
;
3941 ei_aggr
.instance
= ospf
->instance
;
3942 ei_aggr
.route_map_set
.metric
= -1;
3943 ei_aggr
.route_map_set
.metric_type
= -1;
3945 ospf_external_lsa_refresh(ospf
, lsa
, &ei_aggr
,
3946 LSA_REFRESH_FORCE
, true);
3947 SET_FLAG(aggr
->flags
,
3948 OSPF_EXTERNAL_AGGRT_ORIGINATED
);
3950 ospf_lsa_flush_as(ospf
, lsa
);
3953 case OSPF_OPAQUE_LINK_LSA
:
3954 case OSPF_OPAQUE_AREA_LSA
:
3955 case OSPF_OPAQUE_AS_LSA
:
3956 new = ospf_opaque_lsa_refresh(lsa
);
3964 void ospf_refresher_register_lsa(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
3966 uint16_t index
, current_index
;
3968 assert(lsa
->lock
> 0);
3969 assert(IS_LSA_SELF(lsa
));
3971 if (lsa
->refresh_list
< 0) {
3974 ospf
->lsa_refresh_timer
- (2 * OSPF_LS_REFRESH_JITTER
);
3976 ospf
->lsa_refresh_timer
- OSPF_LS_REFRESH_JITTER
;
3978 /* We want to refresh the LSA within OSPF_LS_REFRESH_TIME which
3980 * 1800s. Use jitter so that we send the LSA sometime between
3984 delay
= (frr_weak_random() % (max_delay
- min_delay
))
3987 current_index
= ospf
->lsa_refresh_queue
.index
3988 + (monotime(NULL
) - ospf
->lsa_refresher_started
)
3989 / OSPF_LSA_REFRESHER_GRANULARITY
;
3991 index
= (current_index
+ delay
/ OSPF_LSA_REFRESHER_GRANULARITY
)
3992 % (OSPF_LSA_REFRESHER_SLOTS
);
3994 if (IS_DEBUG_OSPF(lsa
, LSA_REFRESH
))
3996 "LSA[Refresh:Type%d:%pI4]: age %d, added to index %d",
3997 lsa
->data
->type
, &lsa
->data
->id
,
3998 LS_AGE(lsa
), index
);
4000 if (!ospf
->lsa_refresh_queue
.qs
[index
])
4001 ospf
->lsa_refresh_queue
.qs
[index
] = list_new();
4003 listnode_add(ospf
->lsa_refresh_queue
.qs
[index
],
4004 ospf_lsa_lock(lsa
)); /* lsa_refresh_queue */
4005 lsa
->refresh_list
= index
;
4007 if (IS_DEBUG_OSPF(lsa
, LSA_REFRESH
))
4009 "LSA[Refresh:Type%d:%pI4]: %s: setting refresh_list on lsa %p (slot %d)",
4010 lsa
->data
->type
, &lsa
->data
->id
, __func__
,
4011 (void *)lsa
, index
);
4015 void ospf_refresher_unregister_lsa(struct ospf
*ospf
, struct ospf_lsa
*lsa
)
4017 assert(lsa
->lock
> 0);
4018 assert(IS_LSA_SELF(lsa
));
4019 if (lsa
->refresh_list
>= 0) {
4020 struct list
*refresh_list
=
4021 ospf
->lsa_refresh_queue
.qs
[lsa
->refresh_list
];
4022 listnode_delete(refresh_list
, lsa
);
4023 if (!listcount(refresh_list
)) {
4024 list_delete(&refresh_list
);
4025 ospf
->lsa_refresh_queue
.qs
[lsa
->refresh_list
] = NULL
;
4027 lsa
->refresh_list
= -1;
4028 ospf_lsa_unlock(&lsa
); /* lsa_refresh_queue */
4032 void ospf_lsa_refresh_walker(struct thread
*t
)
4034 struct list
*refresh_list
;
4035 struct listnode
*node
, *nnode
;
4036 struct ospf
*ospf
= THREAD_ARG(t
);
4037 struct ospf_lsa
*lsa
;
4039 struct list
*lsa_to_refresh
= list_new();
4042 if (IS_DEBUG_OSPF(lsa
, LSA_REFRESH
))
4043 zlog_debug("LSA[Refresh]: %s: start", __func__
);
4046 i
= ospf
->lsa_refresh_queue
.index
;
4048 /* Note: if clock has jumped backwards, then time change could be
4050 so we are careful to cast the expression to unsigned before taking
4052 ospf
->lsa_refresh_queue
.index
=
4053 ((unsigned long)(ospf
->lsa_refresh_queue
.index
4055 - ospf
->lsa_refresher_started
)
4056 / OSPF_LSA_REFRESHER_GRANULARITY
))
4057 % OSPF_LSA_REFRESHER_SLOTS
;
4059 if (IS_DEBUG_OSPF(lsa
, LSA_REFRESH
))
4060 zlog_debug("LSA[Refresh]: %s: next index %d", __func__
,
4061 ospf
->lsa_refresh_queue
.index
);
4063 for (; i
!= ospf
->lsa_refresh_queue
.index
;
4064 i
= (i
+ 1) % OSPF_LSA_REFRESHER_SLOTS
) {
4065 if (IS_DEBUG_OSPF(lsa
, LSA_REFRESH
))
4066 zlog_debug("LSA[Refresh]: %s: refresh index %d",
4069 refresh_list
= ospf
->lsa_refresh_queue
.qs
[i
];
4073 ospf
->lsa_refresh_queue
.qs
[i
] = NULL
;
4076 for (ALL_LIST_ELEMENTS(refresh_list
, node
, nnode
,
4078 if (IS_DEBUG_OSPF(lsa
, LSA_REFRESH
))
4080 "LSA[Refresh:Type%d:%pI4]: %s: refresh lsa %p (slot %d)",
4081 lsa
->data
->type
, &lsa
->data
->id
,
4082 __func__
, (void *)lsa
, i
);
4084 assert(lsa
->lock
> 0);
4085 list_delete_node(refresh_list
, node
);
4086 lsa
->refresh_list
= -1;
4087 listnode_add(lsa_to_refresh
, lsa
);
4089 list_delete(&refresh_list
);
4093 ospf
->t_lsa_refresher
= NULL
;
4094 thread_add_timer(master
, ospf_lsa_refresh_walker
, ospf
,
4095 ospf
->lsa_refresh_interval
, &ospf
->t_lsa_refresher
);
4096 ospf
->lsa_refresher_started
= monotime(NULL
);
4098 for (ALL_LIST_ELEMENTS(lsa_to_refresh
, node
, nnode
, lsa
)) {
4099 dna_lsa
= ospf_check_dna_lsa(lsa
);
4100 if (!dna_lsa
) { /* refresh only non-DNA LSAs */
4101 ospf_lsa_refresh(ospf
, lsa
);
4102 assert(lsa
->lock
> 0);
4103 ospf_lsa_unlock(&lsa
); /* lsa_refresh_queue & temp for
4109 list_delete(&lsa_to_refresh
);
4111 if (IS_DEBUG_OSPF(lsa
, LSA_REFRESH
))
4112 zlog_debug("LSA[Refresh]: %s: end", __func__
);
4115 /* Flush the LSAs for the specific area */
4116 void ospf_flush_lsa_from_area(struct ospf
*ospf
, struct in_addr area_id
,
4119 struct ospf_area
*area
;
4120 struct route_node
*rn
;
4121 struct ospf_lsa
*lsa
;
4123 area
= ospf_area_get(ospf
, area_id
);
4126 case OSPF_AS_EXTERNAL_LSA
:
4127 if ((area
->external_routing
== OSPF_AREA_NSSA
) ||
4128 (area
->external_routing
== OSPF_AREA_STUB
)) {
4129 LSDB_LOOP (EXTERNAL_LSDB(ospf
), rn
, lsa
)
4130 if (IS_LSA_SELF(lsa
) &&
4131 !(CHECK_FLAG(lsa
->flags
,
4132 OSPF_LSA_LOCAL_XLT
)))
4133 ospf_lsa_flush_area(lsa
, area
);
4136 case OSPF_AS_NSSA_LSA
:
4137 LSDB_LOOP (NSSA_LSDB(area
), rn
, lsa
)
4138 if (IS_LSA_SELF(lsa
))
4139 ospf_lsa_flush_area(lsa
, area
);