1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
|
/*
* Copyright (C) 2003 Yasuhiro Ohara
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Zebra; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* Shortest Path First calculation for OSPFv3 */
#include <zebra.h>
#include "log.h"
#include "memory.h"
#include "command.h"
#include "vty.h"
#include "prefix.h"
#include "pqueue.h"
#include "linklist.h"
#include "thread.h"
#include "ospf6_lsa.h"
#include "ospf6_lsdb.h"
#include "ospf6_route.h"
#include "ospf6_area.h"
#include "ospf6_proto.h"
#include "ospf6_abr.h"
#include "ospf6_spf.h"
#include "ospf6_intra.h"
#include "ospf6_interface.h"
#include "ospf6d.h"
unsigned char conf_debug_ospf6_spf = 0;
static void
ospf6_spf_copy_nexthops_to_route (struct ospf6_route *rt,
struct ospf6_vertex *v)
{
if (rt && v)
ospf6_copy_nexthops (rt->nh_list, v->nh_list);
}
static void
ospf6_spf_merge_nexthops_to_route (struct ospf6_route *rt,
struct ospf6_vertex *v)
{
if (rt && v)
ospf6_merge_nexthops (rt->nh_list, v->nh_list);
}
static unsigned int
ospf6_spf_get_ifindex_from_nh (struct ospf6_vertex *v)
{
struct ospf6_nexthop *nh;
struct listnode *node;
if (v)
{
node = listhead(v->nh_list);
if (node)
{
nh = listgetdata (node);
if (nh)
return (nh->ifindex);
}
}
return 0;
}
static int
ospf6_vertex_cmp (void *a, void *b)
{
struct ospf6_vertex *va = (struct ospf6_vertex *) a;
struct ospf6_vertex *vb = (struct ospf6_vertex *) b;
/* ascending order */
if (va->cost != vb->cost)
return (va->cost - vb->cost);
return (va->hops - vb->hops);
}
static int
ospf6_vertex_id_cmp (void *a, void *b)
{
struct ospf6_vertex *va = (struct ospf6_vertex *) a;
struct ospf6_vertex *vb = (struct ospf6_vertex *) b;
int ret = 0;
ret = ntohl (ospf6_linkstate_prefix_adv_router (&va->vertex_id)) -
ntohl (ospf6_linkstate_prefix_adv_router (&vb->vertex_id));
if (ret)
return ret;
ret = ntohl (ospf6_linkstate_prefix_id (&va->vertex_id)) -
ntohl (ospf6_linkstate_prefix_id (&vb->vertex_id));
return ret;
}
static struct ospf6_vertex *
ospf6_vertex_create (struct ospf6_lsa *lsa)
{
struct ospf6_vertex *v;
v = (struct ospf6_vertex *)
XMALLOC (MTYPE_OSPF6_VERTEX, sizeof (struct ospf6_vertex));
/* type */
if (ntohs (lsa->header->type) == OSPF6_LSTYPE_ROUTER)
v->type = OSPF6_VERTEX_TYPE_ROUTER;
else if (ntohs (lsa->header->type) == OSPF6_LSTYPE_NETWORK)
v->type = OSPF6_VERTEX_TYPE_NETWORK;
else
assert (0);
/* vertex_id */
ospf6_linkstate_prefix (lsa->header->adv_router, lsa->header->id,
&v->vertex_id);
/* name */
ospf6_linkstate_prefix2str (&v->vertex_id, v->name, sizeof (v->name));
if (IS_OSPF6_DEBUG_SPF (PROCESS))
zlog_debug ("%s: Creating vertex %s of type %s", __func__, v->name,
((ntohs (lsa->header->type) == OSPF6_LSTYPE_ROUTER) ? "Router" : "N/W"));
/* Associated LSA */
v->lsa = lsa;
/* capability bits + options */
v->capability = *(u_char *)(OSPF6_LSA_HEADER_END (lsa->header));
v->options[0] = *(u_char *)(OSPF6_LSA_HEADER_END (lsa->header) + 1);
v->options[1] = *(u_char *)(OSPF6_LSA_HEADER_END (lsa->header) + 2);
v->options[2] = *(u_char *)(OSPF6_LSA_HEADER_END (lsa->header) + 3);
v->nh_list = list_new();
v->parent = NULL;
v->child_list = list_new ();
v->child_list->cmp = ospf6_vertex_id_cmp;
return v;
}
static void
ospf6_vertex_delete (struct ospf6_vertex *v)
{
list_delete (v->child_list);
XFREE (MTYPE_OSPF6_VERTEX, v);
}
static struct ospf6_lsa *
ospf6_lsdesc_lsa (caddr_t lsdesc, struct ospf6_vertex *v)
{
struct ospf6_lsa *lsa;
u_int16_t type = 0;
u_int32_t id = 0, adv_router = 0;
if (VERTEX_IS_TYPE (NETWORK, v))
{
type = htons (OSPF6_LSTYPE_ROUTER);
id = htonl (0);
adv_router = NETWORK_LSDESC_GET_NBR_ROUTERID (lsdesc);
}
else
{
if (ROUTER_LSDESC_IS_TYPE (POINTTOPOINT, lsdesc))
{
type = htons (OSPF6_LSTYPE_ROUTER);
id = htonl (0);
adv_router = ROUTER_LSDESC_GET_NBR_ROUTERID (lsdesc);
}
else if (ROUTER_LSDESC_IS_TYPE (TRANSIT_NETWORK, lsdesc))
{
type = htons (OSPF6_LSTYPE_NETWORK);
id = htonl (ROUTER_LSDESC_GET_NBR_IFID (lsdesc));
adv_router = ROUTER_LSDESC_GET_NBR_ROUTERID (lsdesc);
}
}
lsa = ospf6_lsdb_lookup (type, id, adv_router, v->area->lsdb);
if (IS_OSPF6_DEBUG_SPF (PROCESS))
{
char ibuf[16], abuf[16];
inet_ntop (AF_INET, &id, ibuf, sizeof (ibuf));
inet_ntop (AF_INET, &adv_router, abuf, sizeof (abuf));
if (lsa)
zlog_debug (" Link to: %s", lsa->name);
else
zlog_debug (" Link to: [%s Id:%s Adv:%s] No LSA",
ospf6_lstype_name (type), ibuf, abuf);
}
return lsa;
}
static char *
ospf6_lsdesc_backlink (struct ospf6_lsa *lsa,
caddr_t lsdesc, struct ospf6_vertex *v)
{
caddr_t backlink, found = NULL;
int size;
size = (OSPF6_LSA_IS_TYPE (ROUTER, lsa) ?
sizeof (struct ospf6_router_lsdesc) :
sizeof (struct ospf6_network_lsdesc));
for (backlink = OSPF6_LSA_HEADER_END (lsa->header) + 4;
backlink + size <= OSPF6_LSA_END (lsa->header); backlink += size)
{
assert (! (OSPF6_LSA_IS_TYPE (NETWORK, lsa) &&
VERTEX_IS_TYPE (NETWORK, v)));
if (OSPF6_LSA_IS_TYPE (NETWORK, lsa) &&
NETWORK_LSDESC_GET_NBR_ROUTERID (backlink)
== v->lsa->header->adv_router)
found = backlink;
else if (VERTEX_IS_TYPE (NETWORK, v) &&
ROUTER_LSDESC_IS_TYPE (TRANSIT_NETWORK, backlink) &&
ROUTER_LSDESC_GET_NBR_ROUTERID (backlink)
== v->lsa->header->adv_router &&
ROUTER_LSDESC_GET_NBR_IFID (backlink)
== ntohl (v->lsa->header->id))
found = backlink;
else
{
if (! ROUTER_LSDESC_IS_TYPE (POINTTOPOINT, backlink) ||
! ROUTER_LSDESC_IS_TYPE (POINTTOPOINT, lsdesc))
continue;
if (ROUTER_LSDESC_GET_NBR_IFID (backlink) !=
ROUTER_LSDESC_GET_IFID (lsdesc) ||
ROUTER_LSDESC_GET_NBR_IFID (lsdesc) !=
ROUTER_LSDESC_GET_IFID (backlink))
continue;
if (ROUTER_LSDESC_GET_NBR_ROUTERID (backlink) !=
v->lsa->header->adv_router ||
ROUTER_LSDESC_GET_NBR_ROUTERID (lsdesc) !=
lsa->header->adv_router)
continue;
found = backlink;
}
}
if (IS_OSPF6_DEBUG_SPF (PROCESS))
zlog_debug (" Backlink %s", (found ? "OK" : "FAIL"));
return found;
}
static void
ospf6_nexthop_calc (struct ospf6_vertex *w, struct ospf6_vertex *v,
caddr_t lsdesc)
{
int i;
unsigned int ifindex;
struct ospf6_interface *oi;
u_int16_t type;
u_int32_t adv_router;
struct ospf6_lsa *lsa;
struct ospf6_link_lsa *link_lsa;
char buf[64];
assert (VERTEX_IS_TYPE (ROUTER, w));
ifindex = (VERTEX_IS_TYPE (NETWORK, v) ? ospf6_spf_get_ifindex_from_nh (v) :
ROUTER_LSDESC_GET_IFID (lsdesc));
if (ifindex == 0)
{
zlog_err ("No nexthop ifindex at vertex %s", v->name);
return;
}
oi = ospf6_interface_lookup_by_ifindex (ifindex);
if (oi == NULL)
{
if (IS_OSPF6_DEBUG_SPF (PROCESS))
zlog_debug ("Can't find interface in SPF: ifindex %d", ifindex);
return;
}
type = htons (OSPF6_LSTYPE_LINK);
adv_router = (VERTEX_IS_TYPE (NETWORK, v) ?
NETWORK_LSDESC_GET_NBR_ROUTERID (lsdesc) :
ROUTER_LSDESC_GET_NBR_ROUTERID (lsdesc));
i = 0;
for (lsa = ospf6_lsdb_type_router_head (type, adv_router, oi->lsdb); lsa;
lsa = ospf6_lsdb_type_router_next (type, adv_router, lsa))
{
if (VERTEX_IS_TYPE (ROUTER, v) &&
htonl (ROUTER_LSDESC_GET_NBR_IFID (lsdesc)) != lsa->header->id)
continue;
link_lsa = (struct ospf6_link_lsa *) OSPF6_LSA_HEADER_END (lsa->header);
if (IS_OSPF6_DEBUG_SPF (PROCESS))
{
inet_ntop (AF_INET6, &link_lsa->linklocal_addr, buf, sizeof (buf));
zlog_debug (" nexthop %s from %s", buf, lsa->name);
}
ospf6_add_nexthop (w->nh_list, ifindex, &link_lsa->linklocal_addr);
i++;
}
if (i == 0 && IS_OSPF6_DEBUG_SPF (PROCESS))
zlog_debug ("No nexthop for %s found", w->name);
}
static int
ospf6_spf_install (struct ospf6_vertex *v,
struct ospf6_route_table *result_table)
{
struct ospf6_route *route, *parent_route;
struct ospf6_vertex *prev;
if (IS_OSPF6_DEBUG_SPF (PROCESS))
zlog_debug ("SPF install %s hops %d cost %d",
v->name, v->hops, v->cost);
route = ospf6_route_lookup (&v->vertex_id, result_table);
if (route && route->path.cost < v->cost)
{
if (IS_OSPF6_DEBUG_SPF (PROCESS))
zlog_debug (" already installed with lower cost (%d), ignore",
route->path.cost);
ospf6_vertex_delete (v);
return -1;
}
else if (route && route->path.cost == v->cost)
{
if (IS_OSPF6_DEBUG_SPF (PROCESS))
zlog_debug (" another path found, merge");
ospf6_spf_merge_nexthops_to_route (route, v);
prev = (struct ospf6_vertex *) route->route_option;
assert (prev->hops <= v->hops);
ospf6_vertex_delete (v);
return -1;
}
/* There should be no case where candidate being installed (variable
"v") is closer than the one in the SPF tree (variable "route").
In the case something has gone wrong with the behavior of
Priority-Queue. */
/* the case where the route exists already is handled and returned
up to here. */
assert (route == NULL);
route = ospf6_route_create ();
memcpy (&route->prefix, &v->vertex_id, sizeof (struct prefix));
route->type = OSPF6_DEST_TYPE_LINKSTATE;
route->path.type = OSPF6_PATH_TYPE_INTRA;
route->path.origin.type = v->lsa->header->type;
route->path.origin.id = v->lsa->header->id;
route->path.origin.adv_router = v->lsa->header->adv_router;
route->path.metric_type = 1;
route->path.cost = v->cost;
route->path.u.cost_e2 = v->hops;
route->path.router_bits = v->capability;
route->path.options[0] = v->options[0];
route->path.options[1] = v->options[1];
route->path.options[2] = v->options[2];
ospf6_spf_copy_nexthops_to_route (route, v);
/*
* The SPF logic implementation does not transfer the multipathing properties
* of a parent to a child node. Thus if there was a 3-way multipath to a
* node's parent and a single hop from the parent to the child, the logic of
* creating new vertices and computing next hops prevents there from being 3
* paths to the child node. This is primarily because the resolution of
* multipath is done in this routine, not in the main spf loop.
*
* The following logic addresses that problem by merging the parent's nexthop
* information with the child's, if the parent is not the root of the tree.
* This is based on the assumption that before a node's route is installed,
* its parent's route's nexthops have already been installed.
*/
if (v->parent && v->parent->hops)
{
parent_route = ospf6_route_lookup (&v->parent->vertex_id, result_table);
if (parent_route)
{
ospf6_route_merge_nexthops (route, parent_route);
}
}
if (v->parent)
listnode_add_sort (v->parent->child_list, v);
route->route_option = v;
ospf6_route_add (route, result_table);
return 0;
}
void
ospf6_spf_table_finish (struct ospf6_route_table *result_table)
{
struct ospf6_route *route, *nroute;
struct ospf6_vertex *v;
for (route = ospf6_route_head (result_table); route;
route = nroute)
{
nroute = ospf6_route_next (route);
v = (struct ospf6_vertex *) route->route_option;
ospf6_vertex_delete (v);
ospf6_route_remove (route, result_table);
}
}
static const char *ospf6_spf_reason_str[] =
{
"R+",
"R-",
"N+",
"N-",
"L+",
"L-",
"R*",
"N*",
};
void ospf6_spf_reason_string (unsigned int reason, char *buf, int size)
{
unsigned int bit;
int len = 0;
if (!buf)
return;
for (bit = 0; bit <= (sizeof(ospf6_spf_reason_str) / sizeof(char *)); bit++)
{
if ((reason & (1 << bit)) && (len < size))
{
len += snprintf((buf + len), (size - len), "%s%s",
(len > 0) ? ", " : "", ospf6_spf_reason_str[bit]);
}
}
}
/* RFC2328 16.1. Calculating the shortest-path tree for an area */
/* RFC2740 3.8.1. Calculating the shortest path tree for an area */
void
ospf6_spf_calculation (u_int32_t router_id,
struct ospf6_route_table *result_table,
struct ospf6_area *oa)
{
struct pqueue *candidate_list;
struct ospf6_vertex *root, *v, *w;
int size;
caddr_t lsdesc;
struct ospf6_lsa *lsa;
struct in6_addr address;
ospf6_spf_table_finish (result_table);
/* Install the calculating router itself as the root of the SPF tree */
/* construct root vertex */
lsa = ospf6_lsdb_lookup (htons (OSPF6_LSTYPE_ROUTER), htonl (0),
router_id, oa->lsdb_self);
if (lsa == NULL)
{
if (IS_OSPF6_DEBUG_SPF (PROCESS))
zlog_debug ("%s: No router LSA for area %s\n",
__func__, oa->name);
return;
}
/* initialize */
candidate_list = pqueue_create ();
candidate_list->cmp = ospf6_vertex_cmp;
root = ospf6_vertex_create (lsa);
root->area = oa;
root->cost = 0;
root->hops = 0;
inet_pton (AF_INET6, "::1", &address);
/* Actually insert root to the candidate-list as the only candidate */
pqueue_enqueue (root, candidate_list);
/* Iterate until candidate-list becomes empty */
while (candidate_list->size)
{
/* get closest candidate from priority queue */
v = pqueue_dequeue (candidate_list);
/* installing may result in merging or rejecting of the vertex */
if (ospf6_spf_install (v, result_table) < 0)
continue;
/* Skip overloaded routers */
if ((OSPF6_LSA_IS_TYPE (ROUTER, v->lsa) &&
ospf6_router_is_stub_router (v->lsa)))
continue;
/* For each LS description in the just-added vertex V's LSA */
size = (VERTEX_IS_TYPE (ROUTER, v) ?
sizeof (struct ospf6_router_lsdesc) :
sizeof (struct ospf6_network_lsdesc));
for (lsdesc = OSPF6_LSA_HEADER_END (v->lsa->header) + 4;
lsdesc + size <= OSPF6_LSA_END (v->lsa->header); lsdesc += size)
{
lsa = ospf6_lsdesc_lsa (lsdesc, v);
if (lsa == NULL)
continue;
if (OSPF6_LSA_IS_MAXAGE (lsa))
continue;
if (! ospf6_lsdesc_backlink (lsa, lsdesc, v))
continue;
w = ospf6_vertex_create (lsa);
w->area = oa;
w->parent = v;
if (VERTEX_IS_TYPE (ROUTER, v))
{
w->cost = v->cost + ROUTER_LSDESC_GET_METRIC (lsdesc);
w->hops = v->hops + (VERTEX_IS_TYPE (NETWORK, w) ? 0 : 1);
}
else /* NETWORK */
{
w->cost = v->cost;
w->hops = v->hops + 1;
}
/* nexthop calculation */
if (w->hops == 0)
ospf6_add_nexthop (w->nh_list, ROUTER_LSDESC_GET_IFID (lsdesc), NULL);
else if (w->hops == 1 && v->hops == 0)
ospf6_nexthop_calc (w, v, lsdesc);
else
{
ospf6_copy_nexthops (w->nh_list, v->nh_list);
}
/* add new candidate to the candidate_list */
if (IS_OSPF6_DEBUG_SPF (PROCESS))
zlog_debug (" New candidate: %s hops %d cost %d",
w->name, w->hops, w->cost);
pqueue_enqueue (w, candidate_list);
}
}
pqueue_delete (candidate_list);
oa->spf_calculation++;
}
static void
ospf6_spf_log_database (struct ospf6_area *oa)
{
char *p, *end, buffer[256];
struct listnode *node;
struct ospf6_interface *oi;
p = buffer;
end = buffer + sizeof (buffer);
snprintf (p, end - p, "SPF on DB (#LSAs):");
p = (buffer + strlen (buffer) < end ? buffer + strlen (buffer) : end);
snprintf (p, end - p, " Area %s: %d", oa->name, oa->lsdb->count);
p = (buffer + strlen (buffer) < end ? buffer + strlen (buffer) : end);
for (ALL_LIST_ELEMENTS_RO (oa->if_list, node, oi))
{
snprintf (p, end - p, " I/F %s: %d",
oi->interface->name, oi->lsdb->count);
p = (buffer + strlen (buffer) < end ? buffer + strlen (buffer) : end);
}
zlog_debug ("%s", buffer);
}
static int
ospf6_spf_calculation_thread (struct thread *t)
{
struct ospf6_area *oa;
struct ospf6 *ospf6;
struct timeval start, end, runtime;
struct listnode *node;
int areas_processed = 0;
char rbuf[32];
ospf6 = (struct ospf6 *)THREAD_ARG (t);
ospf6->t_spf_calc = NULL;
/* execute SPF calculation */
quagga_gettime (QUAGGA_CLK_MONOTONIC, &start);
if (ospf6_is_router_abr (ospf6))
ospf6_abr_range_reset_cost (ospf6);
for (ALL_LIST_ELEMENTS_RO(ospf6->area_list, node, oa))
{
if (oa == ospf6->backbone)
continue;
if (IS_OSPF6_DEBUG_SPF (PROCESS))
zlog_debug ("SPF calculation for Area %s", oa->name);
if (IS_OSPF6_DEBUG_SPF (DATABASE))
ospf6_spf_log_database (oa);
ospf6_spf_calculation (ospf6->router_id, oa->spf_table, oa);
ospf6_intra_route_calculation (oa);
ospf6_intra_brouter_calculation (oa);
areas_processed++;
}
if (ospf6->backbone)
{
if (IS_OSPF6_DEBUG_SPF (PROCESS))
zlog_debug ("SPF calculation for Backbone area %s",
ospf6->backbone->name);
if (IS_OSPF6_DEBUG_SPF (DATABASE))
ospf6_spf_log_database(ospf6->backbone);
ospf6_spf_calculation(ospf6->router_id, ospf6->backbone->spf_table,
ospf6->backbone);
ospf6_intra_route_calculation(ospf6->backbone);
ospf6_intra_brouter_calculation(ospf6->backbone);
areas_processed++;
}
if (ospf6_is_router_abr (ospf6))
ospf6_abr_defaults_to_stub (ospf6);
quagga_gettime (QUAGGA_CLK_MONOTONIC, &end);
timersub (&end, &start, &runtime);
ospf6->ts_spf_duration = runtime;
ospf6_spf_reason_string(ospf6->spf_reason, rbuf, sizeof(rbuf));
if (IS_OSPF6_DEBUG_SPF (PROCESS) || IS_OSPF6_DEBUG_SPF (TIME))
zlog_debug ("SPF runtime: %ld sec %ld usec",
runtime.tv_sec, runtime.tv_usec);
zlog_info("SPF processing: # Areas: %d, SPF runtime: %ld sec %ld usec, "
"Reason: %s\n", areas_processed, runtime.tv_sec, runtime.tv_usec,
rbuf);
ospf6->last_spf_reason = ospf6->spf_reason;
ospf6_reset_spf_reason(ospf6);
return 0;
}
/* Add schedule for SPF calculation. To avoid frequenst SPF calc, we
set timer for SPF calc. */
void
ospf6_spf_schedule (struct ospf6 *ospf6, unsigned int reason)
{
unsigned long delay, elapsed, ht;
struct timeval now, result;
ospf6_set_spf_reason(ospf6, reason);
if (IS_OSPF6_DEBUG_SPF(PROCESS) || IS_OSPF6_DEBUG_SPF (TIME))
{
char rbuf[32];
ospf6_spf_reason_string(reason, rbuf, sizeof(rbuf));
zlog_debug ("SPF: calculation timer scheduled (reason %s)", rbuf);
}
/* OSPF instance does not exist. */
if (ospf6 == NULL)
return;
/* SPF calculation timer is already scheduled. */
if (ospf6->t_spf_calc)
{
if (IS_OSPF6_DEBUG_SPF(PROCESS) || IS_OSPF6_DEBUG_SPF (TIME))
zlog_debug ("SPF: calculation timer is already scheduled: %p",
ospf6->t_spf_calc);
return;
}
/* XXX Monotic timers: we only care about relative time here. */
now = recent_relative_time ();
timersub (&now, &ospf6->ts_spf, &result);
elapsed = (result.tv_sec * 1000) + (result.tv_usec / 1000);
ht = ospf6->spf_holdtime * ospf6->spf_hold_multiplier;
if (ht > ospf6->spf_max_holdtime)
ht = ospf6->spf_max_holdtime;
/* Get SPF calculation delay time. */
if (elapsed < ht)
{
/* Got an event within the hold time of last SPF. We need to
* increase the hold_multiplier, if it's not already at/past
* maximum value, and wasn't already increased..
*/
if (ht < ospf6->spf_max_holdtime)
ospf6->spf_hold_multiplier++;
/* always honour the SPF initial delay */
if ( (ht - elapsed) < ospf6->spf_delay)
delay = ospf6->spf_delay;
else
delay = ht - elapsed;
}
else
{
/* Event is past required hold-time of last SPF */
delay = ospf6->spf_delay;
ospf6->spf_hold_multiplier = 1;
}
if (IS_OSPF6_DEBUG_SPF(PROCESS) || IS_OSPF6_DEBUG_SPF (TIME))
zlog_debug ("SPF: calculation timer delay = %ld", delay);
zlog_info ("SPF: Scheduled in %ld msec", delay);
ospf6->t_spf_calc =
thread_add_timer_msec (master, ospf6_spf_calculation_thread, ospf6, delay);
}
void
ospf6_spf_display_subtree (struct vty *vty, const char *prefix, int rest,
struct ospf6_vertex *v)
{
struct listnode *node, *nnode;
struct ospf6_vertex *c;
char *next_prefix;
int len;
int restnum;
/* "prefix" is the space prefix of the display line */
vty_out (vty, "%s+-%s [%d]%s", prefix, v->name, v->cost, VNL);
len = strlen (prefix) + 4;
next_prefix = (char *) malloc (len);
if (next_prefix == NULL)
{
vty_out (vty, "malloc failed%s", VNL);
return;
}
snprintf (next_prefix, len, "%s%s", prefix, (rest ? "| " : " "));
restnum = listcount (v->child_list);
for (ALL_LIST_ELEMENTS (v->child_list, node, nnode, c))
{
restnum--;
ospf6_spf_display_subtree (vty, next_prefix, restnum, c);
}
free (next_prefix);
}
DEFUN (debug_ospf6_spf_process,
debug_ospf6_spf_process_cmd,
"debug ospf6 spf process",
DEBUG_STR
OSPF6_STR
"Debug SPF Calculation\n"
"Debug Detailed SPF Process\n"
)
{
unsigned char level = 0;
level = OSPF6_DEBUG_SPF_PROCESS;
OSPF6_DEBUG_SPF_ON (level);
return CMD_SUCCESS;
}
DEFUN (debug_ospf6_spf_time,
debug_ospf6_spf_time_cmd,
"debug ospf6 spf time",
DEBUG_STR
OSPF6_STR
"Debug SPF Calculation\n"
"Measure time taken by SPF Calculation\n"
)
{
unsigned char level = 0;
level = OSPF6_DEBUG_SPF_TIME;
OSPF6_DEBUG_SPF_ON (level);
return CMD_SUCCESS;
}
DEFUN (debug_ospf6_spf_database,
debug_ospf6_spf_database_cmd,
"debug ospf6 spf database",
DEBUG_STR
OSPF6_STR
"Debug SPF Calculation\n"
"Log number of LSAs at SPF Calculation time\n"
)
{
unsigned char level = 0;
level = OSPF6_DEBUG_SPF_DATABASE;
OSPF6_DEBUG_SPF_ON (level);
return CMD_SUCCESS;
}
DEFUN (no_debug_ospf6_spf_process,
no_debug_ospf6_spf_process_cmd,
"no debug ospf6 spf process",
NO_STR
DEBUG_STR
OSPF6_STR
"Quit Debugging SPF Calculation\n"
"Quit Debugging Detailed SPF Process\n"
)
{
unsigned char level = 0;
level = OSPF6_DEBUG_SPF_PROCESS;
OSPF6_DEBUG_SPF_OFF (level);
return CMD_SUCCESS;
}
DEFUN (no_debug_ospf6_spf_time,
no_debug_ospf6_spf_time_cmd,
"no debug ospf6 spf time",
NO_STR
DEBUG_STR
OSPF6_STR
"Quit Debugging SPF Calculation\n"
"Quit Measuring time taken by SPF Calculation\n"
)
{
unsigned char level = 0;
level = OSPF6_DEBUG_SPF_TIME;
OSPF6_DEBUG_SPF_OFF (level);
return CMD_SUCCESS;
}
DEFUN (no_debug_ospf6_spf_database,
no_debug_ospf6_spf_database_cmd,
"no debug ospf6 spf database",
NO_STR
DEBUG_STR
OSPF6_STR
"Debug SPF Calculation\n"
"Quit Logging number of LSAs at SPF Calculation time\n"
)
{
unsigned char level = 0;
level = OSPF6_DEBUG_SPF_DATABASE;
OSPF6_DEBUG_SPF_OFF (level);
return CMD_SUCCESS;
}
static int
ospf6_timers_spf_set (struct vty *vty, unsigned int delay,
unsigned int hold,
unsigned int max)
{
struct ospf6 *ospf = vty->index;
ospf->spf_delay = delay;
ospf->spf_holdtime = hold;
ospf->spf_max_holdtime = max;
return CMD_SUCCESS;
}
DEFUN (ospf6_timers_throttle_spf,
ospf6_timers_throttle_spf_cmd,
"timers throttle spf <0-600000> <0-600000> <0-600000>",
"Adjust routing timers\n"
"Throttling adaptive timer\n"
"OSPF6 SPF timers\n"
"Delay (msec) from first change received till SPF calculation\n"
"Initial hold time (msec) between consecutive SPF calculations\n"
"Maximum hold time (msec)\n")
{
unsigned int delay, hold, max;
if (argc != 3)
{
vty_out (vty, "Insufficient arguments%s", VTY_NEWLINE);
return CMD_WARNING;
}
VTY_GET_INTEGER_RANGE ("SPF delay timer", delay, argv[0], 0, 600000);
VTY_GET_INTEGER_RANGE ("SPF hold timer", hold, argv[1], 0, 600000);
VTY_GET_INTEGER_RANGE ("SPF max-hold timer", max, argv[2], 0, 600000);
return ospf6_timers_spf_set (vty, delay, hold, max);
}
DEFUN (no_ospf6_timers_throttle_spf,
no_ospf6_timers_throttle_spf_cmd,
"no timers throttle spf",
NO_STR
"Adjust routing timers\n"
"Throttling adaptive timer\n"
"OSPF6 SPF timers\n")
{
return ospf6_timers_spf_set (vty,
OSPF_SPF_DELAY_DEFAULT,
OSPF_SPF_HOLDTIME_DEFAULT,
OSPF_SPF_MAX_HOLDTIME_DEFAULT);
}
ALIAS (no_ospf6_timers_throttle_spf,
no_ospf6_timers_throttle_spf_val_cmd,
"no timers throttle spf <0-600000> <0-600000> <0-600000>",
NO_STR
"Adjust routing timers\n"
"Throttling adaptive timer\n"
"OSPF6 SPF timers\n"
"Delay (msec) from first change received till SPF calculation\n"
"Initial hold time (msec) between consecutive SPF calculations\n"
"Maximum hold time (msec)\n")
int
config_write_ospf6_debug_spf (struct vty *vty)
{
if (IS_OSPF6_DEBUG_SPF (PROCESS))
vty_out (vty, "debug ospf6 spf process%s", VNL);
if (IS_OSPF6_DEBUG_SPF (TIME))
vty_out (vty, "debug ospf6 spf time%s", VNL);
if (IS_OSPF6_DEBUG_SPF (DATABASE))
vty_out (vty, "debug ospf6 spf database%s", VNL);
return 0;
}
void
ospf6_spf_config_write (struct vty *vty)
{
if (ospf6->spf_delay != OSPF_SPF_DELAY_DEFAULT ||
ospf6->spf_holdtime != OSPF_SPF_HOLDTIME_DEFAULT ||
ospf6->spf_max_holdtime != OSPF_SPF_MAX_HOLDTIME_DEFAULT)
vty_out (vty, " timers throttle spf %d %d %d%s",
ospf6->spf_delay, ospf6->spf_holdtime,
ospf6->spf_max_holdtime, VTY_NEWLINE);
}
void
install_element_ospf6_debug_spf (void)
{
install_element (ENABLE_NODE, &debug_ospf6_spf_process_cmd);
install_element (ENABLE_NODE, &debug_ospf6_spf_time_cmd);
install_element (ENABLE_NODE, &debug_ospf6_spf_database_cmd);
install_element (ENABLE_NODE, &no_debug_ospf6_spf_process_cmd);
install_element (ENABLE_NODE, &no_debug_ospf6_spf_time_cmd);
install_element (ENABLE_NODE, &no_debug_ospf6_spf_database_cmd);
install_element (CONFIG_NODE, &debug_ospf6_spf_process_cmd);
install_element (CONFIG_NODE, &debug_ospf6_spf_time_cmd);
install_element (CONFIG_NODE, &debug_ospf6_spf_database_cmd);
install_element (CONFIG_NODE, &no_debug_ospf6_spf_process_cmd);
install_element (CONFIG_NODE, &no_debug_ospf6_spf_time_cmd);
install_element (CONFIG_NODE, &no_debug_ospf6_spf_database_cmd);
}
void
ospf6_spf_init (void)
{
install_element (OSPF6_NODE, &ospf6_timers_throttle_spf_cmd);
install_element (OSPF6_NODE, &no_ospf6_timers_throttle_spf_cmd);
install_element (OSPF6_NODE, &no_ospf6_timers_throttle_spf_val_cmd);
}
|