forked from Quagga/quagga
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathospf_zebra.c
1273 lines (1044 loc) · 33.4 KB
/
ospf_zebra.c
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
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Zebra connect library for OSPFd
* Copyright (C) 1997, 98, 99, 2000 Kunihiro Ishiguro, Toshiaki Takada
*
* 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.
*/
#include <zebra.h>
#include "thread.h"
#include "command.h"
#include "network.h"
#include "prefix.h"
#include "routemap.h"
#include "table.h"
#include "stream.h"
#include "memory.h"
#include "zclient.h"
#include "filter.h"
#include "plist.h"
#include "log.h"
#include "ospfd/ospfd.h"
#include "ospfd/ospf_interface.h"
#include "ospfd/ospf_ism.h"
#include "ospfd/ospf_asbr.h"
#include "ospfd/ospf_asbr.h"
#include "ospfd/ospf_abr.h"
#include "ospfd/ospf_lsa.h"
#include "ospfd/ospf_dump.h"
#include "ospfd/ospf_route.h"
#include "ospfd/ospf_zebra.h"
#ifdef HAVE_SNMP
#include "ospfd/ospf_snmp.h"
#endif /* HAVE_SNMP */
/* Zebra structure to hold current status. */
struct zclient *zclient = NULL;
/* For registering threads. */
extern struct thread_master *master;
struct in_addr router_id_zebra;
/* Router-id update message from zebra. */
static int
ospf_router_id_update_zebra (int command, struct zclient *zclient,
zebra_size_t length)
{
struct ospf *ospf;
struct prefix router_id;
zebra_router_id_update_read(zclient->ibuf,&router_id);
router_id_zebra = router_id.u.prefix4;
ospf = ospf_lookup ();
if (ospf != NULL)
ospf_router_id_update (ospf);
return 0;
}
/* Inteface addition message from zebra. */
static int
ospf_interface_add (int command, struct zclient *zclient, zebra_size_t length)
{
struct interface *ifp;
struct ospf *ospf;
ifp = zebra_interface_add_read (zclient->ibuf);
if (IS_DEBUG_OSPF (zebra, ZEBRA_INTERFACE))
zlog_debug ("Zebra: interface add %s index %d flags %ld metric %d mtu %d",
ifp->name, ifp->ifindex, ifp->flags, ifp->metric, ifp->mtu);
assert (ifp->info);
if (!OSPF_IF_PARAM_CONFIGURED (IF_DEF_PARAMS (ifp), type))
{
SET_IF_PARAM (IF_DEF_PARAMS (ifp), type);
IF_DEF_PARAMS (ifp)->type = ospf_default_iftype(ifp);
}
ospf = ospf_lookup ();
if (ospf != NULL)
ospf_if_update (ospf);
#ifdef HAVE_SNMP
ospf_snmp_if_update (ifp);
#endif /* HAVE_SNMP */
return 0;
}
static int
ospf_interface_delete (int command, struct zclient *zclient,
zebra_size_t length)
{
struct interface *ifp;
struct stream *s;
struct route_node *rn;
s = zclient->ibuf;
/* zebra_interface_state_read() updates interface structure in iflist */
ifp = zebra_interface_state_read (s);
if (ifp == NULL)
return 0;
if (if_is_up (ifp))
zlog_warn ("Zebra: got delete of %s, but interface is still up",
ifp->name);
if (IS_DEBUG_OSPF (zebra, ZEBRA_INTERFACE))
zlog_debug
("Zebra: interface delete %s index %d flags %ld metric %d mtu %d",
ifp->name, ifp->ifindex, ifp->flags, ifp->metric, ifp->mtu);
#ifdef HAVE_SNMP
ospf_snmp_if_delete (ifp);
#endif /* HAVE_SNMP */
for (rn = route_top (IF_OIFS (ifp)); rn; rn = route_next (rn))
if (rn->info)
ospf_if_free ((struct ospf_interface *) rn->info);
ifp->ifindex = IFINDEX_INTERNAL;
return 0;
}
static struct interface *
zebra_interface_if_lookup (struct stream *s)
{
char ifname_tmp[INTERFACE_NAMSIZ];
/* Read interface name. */
stream_get (ifname_tmp, s, INTERFACE_NAMSIZ);
/* And look it up. */
return if_lookup_by_name_len(ifname_tmp,
strnlen(ifname_tmp, INTERFACE_NAMSIZ));
}
static int
ospf_interface_state_up (int command, struct zclient *zclient,
zebra_size_t length)
{
struct interface *ifp;
struct ospf_interface *oi;
struct route_node *rn;
ifp = zebra_interface_if_lookup (zclient->ibuf);
if (ifp == NULL)
return 0;
/* Interface is already up. */
if (if_is_operative (ifp))
{
/* Temporarily keep ifp values. */
struct interface if_tmp;
memcpy (&if_tmp, ifp, sizeof (struct interface));
zebra_interface_if_set_value (zclient->ibuf, ifp);
if (IS_DEBUG_OSPF (zebra, ZEBRA_INTERFACE))
zlog_debug ("Zebra: Interface[%s] state update.", ifp->name);
if (if_tmp.bandwidth != ifp->bandwidth)
{
if (IS_DEBUG_OSPF (zebra, ZEBRA_INTERFACE))
zlog_debug ("Zebra: Interface[%s] bandwidth change %d -> %d.",
ifp->name, if_tmp.bandwidth, ifp->bandwidth);
ospf_if_recalculate_output_cost (ifp);
}
if (if_tmp.mtu != ifp->mtu)
{
if (IS_DEBUG_OSPF (zebra, ZEBRA_INTERFACE))
zlog_debug ("Zebra: Interface[%s] MTU change %u -> %u.",
ifp->name, if_tmp.mtu, ifp->mtu);
/* Must reset the interface (simulate down/up) when MTU changes. */
ospf_if_reset(ifp);
}
return 0;
}
zebra_interface_if_set_value (zclient->ibuf, ifp);
if (IS_DEBUG_OSPF (zebra, ZEBRA_INTERFACE))
zlog_debug ("Zebra: Interface[%s] state change to up.", ifp->name);
for (rn = route_top (IF_OIFS (ifp)); rn; rn = route_next (rn))
{
if ((oi = rn->info) == NULL)
continue;
ospf_if_up (oi);
}
return 0;
}
static int
ospf_interface_state_down (int command, struct zclient *zclient,
zebra_size_t length)
{
struct interface *ifp;
struct ospf_interface *oi;
struct route_node *node;
ifp = zebra_interface_state_read (zclient->ibuf);
if (ifp == NULL)
return 0;
if (IS_DEBUG_OSPF (zebra, ZEBRA_INTERFACE))
zlog_debug ("Zebra: Interface[%s] state change to down.", ifp->name);
for (node = route_top (IF_OIFS (ifp)); node; node = route_next (node))
{
if ((oi = node->info) == NULL)
continue;
ospf_if_down (oi);
}
return 0;
}
static int
ospf_interface_address_add (int command, struct zclient *zclient,
zebra_size_t length)
{
struct ospf *ospf;
struct connected *c;
c = zebra_interface_address_read (command, zclient->ibuf);
if (c == NULL)
return 0;
ospf = ospf_lookup ();
if (ospf != NULL)
ospf_if_update (ospf);
#ifdef HAVE_SNMP
ospf_snmp_if_update (c->ifp);
#endif /* HAVE_SNMP */
return 0;
}
static int
ospf_interface_address_delete (int command, struct zclient *zclient,
zebra_size_t length)
{
struct ospf *ospf;
struct connected *c;
struct interface *ifp;
struct ospf_interface *oi;
struct route_node *rn;
struct prefix p;
c = zebra_interface_address_read (command, zclient->ibuf);
if (c == NULL)
return 0;
ifp = c->ifp;
p = *c->address;
p.prefixlen = IPV4_MAX_PREFIXLEN;
rn = route_node_lookup (IF_OIFS (ifp), &p);
if (!rn)
{
connected_free (c);
return 0;
}
assert (rn->info);
oi = rn->info;
/* Call interface hook functions to clean up */
ospf_if_free (oi);
#ifdef HAVE_SNMP
ospf_snmp_if_update (c->ifp);
#endif /* HAVE_SNMP */
connected_free (c);
ospf = ospf_lookup ();
if (ospf != NULL)
ospf_if_update (ospf);
return 0;
}
void
ospf_zebra_add (struct prefix_ipv4 *p, struct ospf_route *or)
{
u_char message;
u_char distance;
u_char flags;
int psize;
struct stream *s;
struct ospf_path *path;
struct listnode *node;
if (zclient->redist[ZEBRA_ROUTE_OSPF])
{
message = 0;
flags = 0;
/* OSPF pass nexthop and metric */
SET_FLAG (message, ZAPI_MESSAGE_NEXTHOP);
SET_FLAG (message, ZAPI_MESSAGE_METRIC);
/* Distance value. */
distance = ospf_distance_apply (p, or);
if (distance)
SET_FLAG (message, ZAPI_MESSAGE_DISTANCE);
/* Make packet. */
s = zclient->obuf;
stream_reset (s);
/* Put command, type, flags, message. */
zclient_create_header (s, ZEBRA_IPV4_ROUTE_ADD);
stream_putc (s, ZEBRA_ROUTE_OSPF);
stream_putc (s, flags);
stream_putc (s, message);
/* Put prefix information. */
psize = PSIZE (p->prefixlen);
stream_putc (s, p->prefixlen);
stream_write (s, (u_char *) & p->prefix, psize);
/* Nexthop count. */
stream_putc (s, or->paths->count);
/* Nexthop, ifindex, distance and metric information. */
for (ALL_LIST_ELEMENTS_RO (or->paths, node, path))
{
if (path->nexthop.s_addr != INADDR_ANY)
{
stream_putc (s, ZEBRA_NEXTHOP_IPV4);
stream_put_in_addr (s, &path->nexthop);
}
else
{
stream_putc (s, ZEBRA_NEXTHOP_IFINDEX);
if (path->oi)
stream_putl (s, path->oi->ifp->ifindex);
else
stream_putl (s, 0);
}
if (IS_DEBUG_OSPF (zebra, ZEBRA_REDISTRIBUTE))
{
zlog_debug ("Zebra: Route add %s/%d nexthop %s",
inet_ntoa (p->prefix),
p->prefixlen, inet_ntoa (path->nexthop));
}
}
if (CHECK_FLAG (message, ZAPI_MESSAGE_DISTANCE))
stream_putc (s, distance);
if (CHECK_FLAG (message, ZAPI_MESSAGE_METRIC))
{
if (or->path_type == OSPF_PATH_TYPE1_EXTERNAL)
stream_putl (s, or->cost + or->u.ext.type2_cost);
else if (or->path_type == OSPF_PATH_TYPE2_EXTERNAL)
stream_putl (s, or->u.ext.type2_cost);
else
stream_putl (s, or->cost);
}
stream_putw_at (s, 0, stream_get_endp (s));
zclient_send_message(zclient);
}
}
void
ospf_zebra_delete (struct prefix_ipv4 *p, struct ospf_route *or)
{
struct zapi_ipv4 api;
struct ospf_path *path;
struct in_addr *nexthop;
struct listnode *node, *nnode;
if (zclient->redist[ZEBRA_ROUTE_OSPF])
{
api.type = ZEBRA_ROUTE_OSPF;
api.flags = 0;
api.message = 0;
api.ifindex_num = 0;
api.nexthop_num = 0;
for (ALL_LIST_ELEMENTS (or->paths, node, nnode, path))
{
if (path->nexthop.s_addr != INADDR_ANY)
{
SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP);
api.nexthop_num = 1;
nexthop = &path->nexthop;
api.nexthop = &nexthop;
}
else if (ospf_if_exists(path->oi) && (path->oi->ifp))
{
SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP);
api.ifindex_num = 1;
api.ifindex = &path->oi->ifp->ifindex;
}
else if ( IS_DEBUG_OSPF(zebra,ZEBRA_REDISTRIBUTE) )
{
zlog_debug("Zebra: no ifp %s %d",
inet_ntoa(p->prefix),
p->prefixlen);
}
zapi_ipv4_route (ZEBRA_IPV4_ROUTE_DELETE, zclient, p, &api);
if (IS_DEBUG_OSPF (zebra, ZEBRA_REDISTRIBUTE) && api.nexthop_num)
{
zlog_debug ("Zebra: Route delete %s/%d nexthop %s",
inet_ntoa (p->prefix),
p->prefixlen, inet_ntoa (**api.nexthop));
}
if (IS_DEBUG_OSPF (zebra, ZEBRA_REDISTRIBUTE) && api.ifindex_num)
{
zlog_debug ("Zebra: Route delete %s/%d ifindex %d",
inet_ntoa (p->prefix),
p->prefixlen, *api.ifindex);
}
}
}
}
void
ospf_zebra_add_discard (struct prefix_ipv4 *p)
{
struct zapi_ipv4 api;
if (zclient->redist[ZEBRA_ROUTE_OSPF])
{
api.type = ZEBRA_ROUTE_OSPF;
api.flags = ZEBRA_FLAG_BLACKHOLE;
api.message = 0;
SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP);
api.nexthop_num = 0;
api.ifindex_num = 0;
zapi_ipv4_route (ZEBRA_IPV4_ROUTE_ADD, zclient, p, &api);
}
}
void
ospf_zebra_delete_discard (struct prefix_ipv4 *p)
{
struct zapi_ipv4 api;
if (zclient->redist[ZEBRA_ROUTE_OSPF])
{
api.type = ZEBRA_ROUTE_OSPF;
api.flags = ZEBRA_FLAG_BLACKHOLE;
api.message = 0;
SET_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP);
api.nexthop_num = 0;
api.ifindex_num = 0;
zapi_ipv4_route (ZEBRA_IPV4_ROUTE_DELETE, zclient, p, &api);
if (IS_DEBUG_OSPF (zebra, ZEBRA_REDISTRIBUTE))
zlog_debug ("Zebra: Route delete discard %s/%d",
inet_ntoa (p->prefix), p->prefixlen);
}
}
int
ospf_is_type_redistributed (int type)
{
return (DEFAULT_ROUTE_TYPE (type)) ?
zclient->default_information : zclient->redist[type];
}
int
ospf_redistribute_set (struct ospf *ospf, int type, int mtype, int mvalue)
{
int force = 0;
if (ospf_is_type_redistributed (type))
{
if (mtype != ospf->dmetric[type].type)
{
ospf->dmetric[type].type = mtype;
force = LSA_REFRESH_FORCE;
}
if (mvalue != ospf->dmetric[type].value)
{
ospf->dmetric[type].value = mvalue;
force = LSA_REFRESH_FORCE;
}
ospf_external_lsa_refresh_type (ospf, type, force);
if (IS_DEBUG_OSPF (zebra, ZEBRA_REDISTRIBUTE))
zlog_debug ("Redistribute[%s]: Refresh Type[%d], Metric[%d]",
ospf_redist_string(type),
metric_type (ospf, type), metric_value (ospf, type));
return CMD_SUCCESS;
}
ospf->dmetric[type].type = mtype;
ospf->dmetric[type].value = mvalue;
zclient_redistribute (ZEBRA_REDISTRIBUTE_ADD, zclient, type);
if (IS_DEBUG_OSPF (zebra, ZEBRA_REDISTRIBUTE))
zlog_debug ("Redistribute[%s]: Start Type[%d], Metric[%d]",
ospf_redist_string(type),
metric_type (ospf, type), metric_value (ospf, type));
ospf_asbr_status_update (ospf, ++ospf->redistribute);
return CMD_SUCCESS;
}
int
ospf_redistribute_unset (struct ospf *ospf, int type)
{
if (type == zclient->redist_default)
return CMD_SUCCESS;
if (!ospf_is_type_redistributed (type))
return CMD_SUCCESS;
zclient_redistribute (ZEBRA_REDISTRIBUTE_DELETE, zclient, type);
if (IS_DEBUG_OSPF (zebra, ZEBRA_REDISTRIBUTE))
zlog_debug ("Redistribute[%s]: Stop",
ospf_redist_string(type));
ospf->dmetric[type].type = -1;
ospf->dmetric[type].value = -1;
/* Remove the routes from OSPF table. */
ospf_redistribute_withdraw (type);
ospf_asbr_status_update (ospf, --ospf->redistribute);
return CMD_SUCCESS;
}
int
ospf_redistribute_default_set (struct ospf *ospf, int originate,
int mtype, int mvalue)
{
int force = 0;
if (ospf_is_type_redistributed (DEFAULT_ROUTE))
{
if (mtype != ospf->dmetric[DEFAULT_ROUTE].type)
{
ospf->dmetric[DEFAULT_ROUTE].type = mtype;
force = 1;
}
if (mvalue != ospf->dmetric[DEFAULT_ROUTE].value)
{
force = 1;
ospf->dmetric[DEFAULT_ROUTE].value = mvalue;
}
ospf_external_lsa_refresh_default (ospf);
if (IS_DEBUG_OSPF (zebra, ZEBRA_REDISTRIBUTE))
zlog_debug ("Redistribute[%s]: Refresh Type[%d], Metric[%d]",
ospf_redist_string(DEFAULT_ROUTE),
metric_type (ospf, DEFAULT_ROUTE),
metric_value (ospf, DEFAULT_ROUTE));
return CMD_SUCCESS;
}
ospf->default_originate = originate;
ospf->dmetric[DEFAULT_ROUTE].type = mtype;
ospf->dmetric[DEFAULT_ROUTE].value = mvalue;
zclient_redistribute_default (ZEBRA_REDISTRIBUTE_DEFAULT_ADD, zclient);
if (IS_DEBUG_OSPF (zebra, ZEBRA_REDISTRIBUTE))
zlog_debug ("Redistribute[DEFAULT]: Start Type[%d], Metric[%d]",
metric_type (ospf, DEFAULT_ROUTE),
metric_value (ospf, DEFAULT_ROUTE));
if (ospf->router_id.s_addr == 0)
ospf->external_origin |= (1 << DEFAULT_ROUTE);
else
thread_add_timer (master, ospf_default_originate_timer,
&ospf->default_originate, 1);
ospf_asbr_status_update (ospf, ++ospf->redistribute);
return CMD_SUCCESS;
}
int
ospf_redistribute_default_unset (struct ospf *ospf)
{
if (!ospf_is_type_redistributed (DEFAULT_ROUTE))
return CMD_SUCCESS;
ospf->default_originate = DEFAULT_ORIGINATE_NONE;
ospf->dmetric[DEFAULT_ROUTE].type = -1;
ospf->dmetric[DEFAULT_ROUTE].value = -1;
zclient_redistribute_default (ZEBRA_REDISTRIBUTE_DEFAULT_DELETE, zclient);
if (IS_DEBUG_OSPF (zebra, ZEBRA_REDISTRIBUTE))
zlog_debug ("Redistribute[DEFAULT]: Stop");
ospf_asbr_status_update (ospf, --ospf->redistribute);
return CMD_SUCCESS;
}
static int
ospf_external_lsa_originate_check (struct ospf *ospf,
struct external_info *ei)
{
/* If prefix is multicast, then do not originate LSA. */
if (IN_MULTICAST (htonl (ei->p.prefix.s_addr)))
{
zlog_info ("LSA[Type5:%s]: Not originate AS-external-LSA, "
"Prefix belongs multicast", inet_ntoa (ei->p.prefix));
return 0;
}
/* Take care of default-originate. */
if (is_prefix_default (&ei->p))
if (ospf->default_originate == DEFAULT_ORIGINATE_NONE)
{
zlog_info ("LSA[Type5:0.0.0.0]: Not originate AS-exntenal-LSA "
"for default");
return 0;
}
return 1;
}
/* If connected prefix is OSPF enable interface, then do not announce. */
int
ospf_distribute_check_connected (struct ospf *ospf, struct external_info *ei)
{
struct route_node *rn;
for (rn = route_top (ospf->networks); rn; rn = route_next (rn))
if (rn->info != NULL)
if (prefix_match (&rn->p, (struct prefix *) &ei->p))
{
route_unlock_node (rn);
return 0;
}
return 1;
}
/* return 1 if external LSA must be originated, 0 otherwise */
int
ospf_redistribute_check (struct ospf *ospf,
struct external_info *ei, int *changed)
{
struct route_map_set_values save_values;
struct prefix_ipv4 *p = &ei->p;
u_char type = is_prefix_default (&ei->p) ? DEFAULT_ROUTE : ei->type;
if (changed)
*changed = 0;
if (!ospf_external_lsa_originate_check (ospf, ei))
return 0;
/* Take care connected route. */
if (type == ZEBRA_ROUTE_CONNECT &&
!ospf_distribute_check_connected (ospf, ei))
return 0;
if (!DEFAULT_ROUTE_TYPE (type) && DISTRIBUTE_NAME (ospf, type))
/* distirbute-list exists, but access-list may not? */
if (DISTRIBUTE_LIST (ospf, type))
if (access_list_apply (DISTRIBUTE_LIST (ospf, type), p) == FILTER_DENY)
{
if (IS_DEBUG_OSPF (zebra, ZEBRA_REDISTRIBUTE))
zlog_debug ("Redistribute[%s]: %s/%d filtered by ditribute-list.",
ospf_redist_string(type),
inet_ntoa (p->prefix), p->prefixlen);
return 0;
}
save_values = ei->route_map_set;
ospf_reset_route_map_set_values (&ei->route_map_set);
/* apply route-map if needed */
if (ROUTEMAP_NAME (ospf, type))
{
int ret;
ret = route_map_apply (ROUTEMAP (ospf, type), (struct prefix *) p,
RMAP_OSPF, ei);
if (ret == RMAP_DENYMATCH)
{
ei->route_map_set = save_values;
if (IS_DEBUG_OSPF (zebra, ZEBRA_REDISTRIBUTE))
zlog_debug ("Redistribute[%s]: %s/%d filtered by route-map.",
ospf_redist_string(type),
inet_ntoa (p->prefix), p->prefixlen);
return 0;
}
/* check if 'route-map set' changed something */
if (changed)
*changed = !ospf_route_map_set_compare (&ei->route_map_set,
&save_values);
}
return 1;
}
/* OSPF route-map set for redistribution */
void
ospf_routemap_set (struct ospf *ospf, int type, const char *name)
{
if (ROUTEMAP_NAME (ospf, type))
free (ROUTEMAP_NAME (ospf, type));
ROUTEMAP_NAME (ospf, type) = strdup (name);
ROUTEMAP (ospf, type) = route_map_lookup_by_name (name);
}
void
ospf_routemap_unset (struct ospf *ospf, int type)
{
if (ROUTEMAP_NAME (ospf, type))
free (ROUTEMAP_NAME (ospf, type));
ROUTEMAP_NAME (ospf, type) = NULL;
ROUTEMAP (ospf, type) = NULL;
}
/* Zebra route add and delete treatment. */
static int
ospf_zebra_read_ipv4 (int command, struct zclient *zclient,
zebra_size_t length)
{
struct stream *s;
struct zapi_ipv4 api;
unsigned long ifindex;
struct in_addr nexthop;
struct prefix_ipv4 p;
struct external_info *ei;
struct ospf *ospf;
s = zclient->ibuf;
ifindex = 0;
nexthop.s_addr = 0;
/* Type, flags, message. */
api.type = stream_getc (s);
api.flags = stream_getc (s);
api.message = stream_getc (s);
/* IPv4 prefix. */
memset (&p, 0, sizeof (struct prefix_ipv4));
p.family = AF_INET;
p.prefixlen = stream_getc (s);
stream_get (&p.prefix, s, PSIZE (p.prefixlen));
if (IPV4_NET127(ntohl(p.prefix.s_addr)))
return 0;
/* Nexthop, ifindex, distance, metric. */
if (CHECK_FLAG (api.message, ZAPI_MESSAGE_NEXTHOP))
{
api.nexthop_num = stream_getc (s);
nexthop.s_addr = stream_get_ipv4 (s);
}
if (CHECK_FLAG (api.message, ZAPI_MESSAGE_IFINDEX))
{
api.ifindex_num = stream_getc (s);
/* XXX assert(api.ifindex_num == 1); */
ifindex = stream_getl (s);
}
if (CHECK_FLAG (api.message, ZAPI_MESSAGE_DISTANCE))
api.distance = stream_getc (s);
if (CHECK_FLAG (api.message, ZAPI_MESSAGE_METRIC))
api.metric = stream_getl (s);
ospf = ospf_lookup ();
if (ospf == NULL)
return 0;
if (command == ZEBRA_IPV4_ROUTE_ADD)
{
/* XXX|HACK|TODO|FIXME:
* Maybe we should ignore reject/blackhole routes? Testing shows that
* there is no problems though and this is only way to "summarize"
* routes in ASBR at the moment. Maybe we need just a better generalised
* solution for these types?
*
* if ( CHECK_FLAG (api.flags, ZEBRA_FLAG_BLACKHOLE)
* || CHECK_FLAG (api.flags, ZEBRA_FLAG_REJECT))
* return 0;
*/
ei = ospf_external_info_add (api.type, p, ifindex, nexthop);
if (ospf->router_id.s_addr == 0)
/* Set flags to generate AS-external-LSA originate event
for each redistributed protocols later. */
ospf->external_origin |= (1 << api.type);
else
{
if (ei)
{
if (is_prefix_default (&p))
ospf_external_lsa_refresh_default (ospf);
else
{
struct ospf_lsa *current;
current = ospf_external_info_find_lsa (ospf, &ei->p);
if (!current)
ospf_external_lsa_originate (ospf, ei);
else if (IS_LSA_MAXAGE (current))
ospf_external_lsa_refresh (ospf, current,
ei, LSA_REFRESH_FORCE);
else
zlog_warn ("ospf_zebra_read_ipv4() : %s already exists",
inet_ntoa (p.prefix));
}
}
}
}
else /* if (command == ZEBRA_IPV4_ROUTE_DELETE) */
{
ospf_external_info_delete (api.type, p);
if (is_prefix_default (&p))
ospf_external_lsa_refresh_default (ospf);
else
ospf_external_lsa_flush (ospf, api.type, &p, ifindex /*, nexthop */);
}
return 0;
}
int
ospf_distribute_list_out_set (struct ospf *ospf, int type, const char *name)
{
/* Lookup access-list for distribute-list. */
DISTRIBUTE_LIST (ospf, type) = access_list_lookup (AFI_IP, name);
/* Clear previous distribute-name. */
if (DISTRIBUTE_NAME (ospf, type))
free (DISTRIBUTE_NAME (ospf, type));
/* Set distribute-name. */
DISTRIBUTE_NAME (ospf, type) = strdup (name);
/* If access-list have been set, schedule update timer. */
if (DISTRIBUTE_LIST (ospf, type))
ospf_distribute_list_update (ospf, type);
return CMD_SUCCESS;
}
int
ospf_distribute_list_out_unset (struct ospf *ospf, int type, const char *name)
{
/* Schedule update timer. */
if (DISTRIBUTE_LIST (ospf, type))
ospf_distribute_list_update (ospf, type);
/* Unset distribute-list. */
DISTRIBUTE_LIST (ospf, type) = NULL;
/* Clear distribute-name. */
if (DISTRIBUTE_NAME (ospf, type))
free (DISTRIBUTE_NAME (ospf, type));
DISTRIBUTE_NAME (ospf, type) = NULL;
return CMD_SUCCESS;
}
/* distribute-list update timer. */
static int
ospf_distribute_list_update_timer (struct thread *thread)
{
struct route_node *rn;
struct external_info *ei;
struct route_table *rt;
struct ospf_lsa *lsa;
intptr_t type;
struct ospf *ospf;
type = (intptr_t)THREAD_ARG (thread);
assert (type <= ZEBRA_ROUTE_MAX);
rt = EXTERNAL_INFO (type);
ospf = ospf_lookup ();
if (ospf == NULL)
return 0;
ospf->t_distribute_update = NULL;
zlog_info ("Zebra[Redistribute]: distribute-list update timer fired!");
/* foreach all external info. */
if (rt)
for (rn = route_top (rt); rn; rn = route_next (rn))
if ((ei = rn->info) != NULL)
{
if (is_prefix_default (&ei->p))
ospf_external_lsa_refresh_default (ospf);
else if ((lsa = ospf_external_info_find_lsa (ospf, &ei->p)))
ospf_external_lsa_refresh (ospf, lsa, ei, LSA_REFRESH_IF_CHANGED);
else
ospf_external_lsa_originate (ospf, ei);
}
return 0;
}
#define OSPF_DISTRIBUTE_UPDATE_DELAY 5
/* Update distribute-list and set timer to apply access-list. */
void
ospf_distribute_list_update (struct ospf *ospf, int type)
{
struct route_table *rt;
/* External info does not exist. */
if (!(rt = EXTERNAL_INFO (type)))
return;
/* If exists previously invoked thread, then cancel it. */
if (ospf->t_distribute_update)
OSPF_TIMER_OFF (ospf->t_distribute_update);
/* Set timer. */
ospf->t_distribute_update =
thread_add_timer (master, ospf_distribute_list_update_timer,
(void *) type, OSPF_DISTRIBUTE_UPDATE_DELAY);
}
/* If access-list is updated, apply some check. */
static void
ospf_filter_update (struct access_list *access)
{
struct ospf *ospf;
int type;
int abr_inv = 0;
struct ospf_area *area;
struct listnode *node;
/* If OSPF instatnce does not exist, return right now. */
ospf = ospf_lookup ();
if (ospf == NULL)
return;
/* Update distribute-list, and apply filter. */
for (type = 0; type <= ZEBRA_ROUTE_MAX; type++)
{
if (ROUTEMAP (ospf, type) != NULL)
{
/* if route-map is not NULL it may be using this access list */
ospf_distribute_list_update (ospf, type);
continue;
}