-
Notifications
You must be signed in to change notification settings - Fork 1.2k
/
pim_rp.c
1412 lines (1196 loc) · 35 KB
/
pim_rp.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
/*
* PIM for Quagga
* Copyright (C) 2015 Cumulus Networks, Inc.
* Donald Sharp
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include "lib/json.h"
#include "log.h"
#include "network.h"
#include "if.h"
#include "linklist.h"
#include "prefix.h"
#include "memory.h"
#include "vty.h"
#include "vrf.h"
#include "plist.h"
#include "nexthop.h"
#include "table.h"
#include "lib_errors.h"
#include "pimd.h"
#include "pim_vty.h"
#include "pim_str.h"
#include "pim_iface.h"
#include "pim_rp.h"
#include "pim_str.h"
#include "pim_rpf.h"
#include "pim_sock.h"
#include "pim_memory.h"
#include "pim_iface.h"
#include "pim_msdp.h"
#include "pim_nht.h"
#include "pim_mroute.h"
#include "pim_oil.h"
#include "pim_zebra.h"
#include "pim_bsm.h"
/* Cleanup pim->rpf_hash each node data */
void pim_rp_list_hash_clean(void *data)
{
struct pim_nexthop_cache *pnc = (struct pim_nexthop_cache *)data;
list_delete(&pnc->rp_list);
hash_clean(pnc->upstream_hash, NULL);
hash_free(pnc->upstream_hash);
pnc->upstream_hash = NULL;
if (pnc->nexthop)
nexthops_free(pnc->nexthop);
XFREE(MTYPE_PIM_NEXTHOP_CACHE, pnc);
}
static void pim_rp_info_free(struct rp_info *rp_info)
{
XFREE(MTYPE_PIM_FILTER_NAME, rp_info->plist);
XFREE(MTYPE_PIM_RP, rp_info);
}
int pim_rp_list_cmp(void *v1, void *v2)
{
struct rp_info *rp1 = (struct rp_info *)v1;
struct rp_info *rp2 = (struct rp_info *)v2;
/*
* Sort by RP IP address
*/
if (rp1->rp.rpf_addr.u.prefix4.s_addr
< rp2->rp.rpf_addr.u.prefix4.s_addr)
return -1;
if (rp1->rp.rpf_addr.u.prefix4.s_addr
> rp2->rp.rpf_addr.u.prefix4.s_addr)
return 1;
/*
* Sort by group IP address
*/
if (rp1->group.u.prefix4.s_addr < rp2->group.u.prefix4.s_addr)
return -1;
if (rp1->group.u.prefix4.s_addr > rp2->group.u.prefix4.s_addr)
return 1;
return 0;
}
void pim_rp_init(struct pim_instance *pim)
{
struct rp_info *rp_info;
struct route_node *rn;
pim->rp_list = list_new();
pim->rp_list->del = (void (*)(void *))pim_rp_info_free;
pim->rp_list->cmp = pim_rp_list_cmp;
pim->rp_table = route_table_init();
rp_info = XCALLOC(MTYPE_PIM_RP, sizeof(*rp_info));
if (!str2prefix("224.0.0.0/4", &rp_info->group)) {
flog_err(EC_LIB_DEVELOPMENT,
"Unable to convert 224.0.0.0/4 to prefix");
list_delete(&pim->rp_list);
route_table_finish(pim->rp_table);
XFREE(MTYPE_PIM_RP, rp_info);
return;
}
rp_info->group.family = AF_INET;
rp_info->rp.rpf_addr.family = AF_INET;
rp_info->rp.rpf_addr.prefixlen = IPV4_MAX_PREFIXLEN;
rp_info->rp.rpf_addr.u.prefix4.s_addr = INADDR_NONE;
listnode_add(pim->rp_list, rp_info);
rn = route_node_get(pim->rp_table, &rp_info->group);
rn->info = rp_info;
if (PIM_DEBUG_TRACE)
zlog_debug(
"Allocated: %p for rp_info: %p(224.0.0.0/4) Lock: %d",
rn, rp_info, rn->lock);
}
void pim_rp_free(struct pim_instance *pim)
{
if (pim->rp_list)
list_delete(&pim->rp_list);
}
/*
* Given an RP's prefix-list, return the RP's rp_info for that prefix-list
*/
static struct rp_info *pim_rp_find_prefix_list(struct pim_instance *pim,
struct in_addr rp,
const char *plist)
{
struct listnode *node;
struct rp_info *rp_info;
for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) {
if (rp.s_addr == rp_info->rp.rpf_addr.u.prefix4.s_addr
&& rp_info->plist && strcmp(rp_info->plist, plist) == 0) {
return rp_info;
}
}
return NULL;
}
/*
* Return true if plist is used by any rp_info
*/
static int pim_rp_prefix_list_used(struct pim_instance *pim, const char *plist)
{
struct listnode *node;
struct rp_info *rp_info;
for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) {
if (rp_info->plist && strcmp(rp_info->plist, plist) == 0) {
return 1;
}
}
return 0;
}
/*
* Given an RP's address, return the RP's rp_info that is an exact match for
* 'group'
*/
static struct rp_info *pim_rp_find_exact(struct pim_instance *pim,
struct in_addr rp,
const struct prefix *group)
{
struct listnode *node;
struct rp_info *rp_info;
for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) {
if (rp.s_addr == rp_info->rp.rpf_addr.u.prefix4.s_addr
&& prefix_same(&rp_info->group, group))
return rp_info;
}
return NULL;
}
/*
* Given a group, return the rp_info for that group
*/
struct rp_info *pim_rp_find_match_group(struct pim_instance *pim,
const struct prefix *group)
{
struct listnode *node;
struct rp_info *best = NULL;
struct rp_info *rp_info;
struct prefix_list *plist;
const struct prefix *p, *bp;
struct route_node *rn;
bp = NULL;
for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) {
if (rp_info->plist) {
plist = prefix_list_lookup(AFI_IP, rp_info->plist);
if (prefix_list_apply_which_prefix(plist, &p, group)
== PREFIX_DENY)
continue;
if (!best) {
best = rp_info;
bp = p;
continue;
}
if (bp && bp->prefixlen < p->prefixlen) {
best = rp_info;
bp = p;
}
}
}
rn = route_node_match(pim->rp_table, group);
if (!rn) {
flog_err(
EC_LIB_DEVELOPMENT,
"%s: BUG We should have found default group information\n",
__PRETTY_FUNCTION__);
return best;
}
rp_info = rn->info;
if (PIM_DEBUG_TRACE) {
char buf[PREFIX_STRLEN];
route_unlock_node(rn);
zlog_debug("Lookedup: %p for rp_info: %p(%s) Lock: %d", rn,
rp_info,
prefix2str(&rp_info->group, buf, sizeof(buf)),
rn->lock);
}
if (!best)
return rp_info;
if (rp_info->group.prefixlen < best->group.prefixlen)
best = rp_info;
return best;
}
/*
* When the user makes "ip pim rp" configuration changes or if they change the
* prefix-list(s) used by these statements we must tickle the upstream state
* for each group to make them re-lookup who their RP should be.
*
* This is a placeholder function for now.
*/
static void pim_rp_refresh_group_to_rp_mapping(struct pim_instance *pim)
{
pim_msdp_i_am_rp_changed(pim);
}
void pim_rp_prefix_list_update(struct pim_instance *pim,
struct prefix_list *plist)
{
struct listnode *node;
struct rp_info *rp_info;
int refresh_needed = 0;
for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) {
if (rp_info->plist
&& strcmp(rp_info->plist, prefix_list_name(plist)) == 0) {
refresh_needed = 1;
break;
}
}
if (refresh_needed)
pim_rp_refresh_group_to_rp_mapping(pim);
}
static int pim_rp_check_interface_addrs(struct rp_info *rp_info,
struct pim_interface *pim_ifp)
{
struct listnode *node;
struct pim_secondary_addr *sec_addr;
if (pim_ifp->primary_address.s_addr
== rp_info->rp.rpf_addr.u.prefix4.s_addr)
return 1;
if (!pim_ifp->sec_addr_list) {
return 0;
}
for (ALL_LIST_ELEMENTS_RO(pim_ifp->sec_addr_list, node, sec_addr)) {
if (prefix_same(&sec_addr->addr, &rp_info->rp.rpf_addr)) {
return 1;
}
}
return 0;
}
static void pim_rp_check_interfaces(struct pim_instance *pim,
struct rp_info *rp_info)
{
struct interface *ifp;
rp_info->i_am_rp = 0;
FOR_ALL_INTERFACES (pim->vrf, ifp) {
struct pim_interface *pim_ifp = ifp->info;
if (!pim_ifp)
continue;
if (pim_rp_check_interface_addrs(rp_info, pim_ifp)) {
rp_info->i_am_rp = 1;
}
}
}
void pim_upstream_update(struct pim_instance *pim, struct pim_upstream *up)
{
struct pim_rpf old_rpf;
enum pim_rpf_result rpf_result;
struct in_addr old_upstream_addr;
struct in_addr new_upstream_addr;
struct prefix nht_p;
old_upstream_addr = up->upstream_addr;
pim_rp_set_upstream_addr(pim, &new_upstream_addr, up->sg.src,
up->sg.grp);
if (PIM_DEBUG_TRACE)
zlog_debug("%s: pim upstream update for old upstream %s",
__PRETTY_FUNCTION__,
inet_ntoa(old_upstream_addr));
if (old_upstream_addr.s_addr == new_upstream_addr.s_addr)
return;
/* Lets consider a case, where a PIM upstream has a better RP as a
* result of a new RP configuration with more precise group range.
* This upstream has to be added to the upstream hash of new RP's
* NHT(pnc) and has to be removed from old RP's NHT upstream hash
*/
if (old_upstream_addr.s_addr != INADDR_ANY) {
/* Deregister addr with Zebra NHT */
nht_p.family = AF_INET;
nht_p.prefixlen = IPV4_MAX_BITLEN;
nht_p.u.prefix4 = old_upstream_addr;
if (PIM_DEBUG_TRACE) {
char buf[PREFIX2STR_BUFFER];
prefix2str(&nht_p, buf, sizeof(buf));
zlog_debug("%s: Deregister upstream %s addr %s with Zebra NHT",
__PRETTY_FUNCTION__, up->sg_str, buf);
}
pim_delete_tracked_nexthop(pim, &nht_p, up, NULL, false);
}
/* Update the upstream address */
up->upstream_addr = new_upstream_addr;
old_rpf.source_nexthop.interface = up->rpf.source_nexthop.interface;
rpf_result = pim_rpf_update(pim, up, &old_rpf);
if (rpf_result == PIM_RPF_FAILURE)
pim_mroute_del(up->channel_oil, __PRETTY_FUNCTION__);
/* update kernel multicast forwarding cache (MFC) */
if (up->rpf.source_nexthop.interface && up->channel_oil) {
ifindex_t ifindex = up->rpf.source_nexthop.interface->ifindex;
int vif_index = pim_if_find_vifindex_by_ifindex(pim, ifindex);
/* Pass Current selected NH vif index to mroute download */
if (vif_index)
pim_scan_individual_oil(up->channel_oil, vif_index);
else {
if (PIM_DEBUG_PIM_NHT)
zlog_debug(
"%s: NHT upstream %s channel_oil IIF %s vif_index is not valid",
__PRETTY_FUNCTION__, up->sg_str,
up->rpf.source_nexthop.interface->name);
}
}
if (rpf_result == PIM_RPF_CHANGED)
pim_zebra_upstream_rpf_changed(pim, up, &old_rpf);
pim_zebra_update_all_interfaces(pim);
}
int pim_rp_new_config(struct pim_instance *pim, const char *rp,
const char *group_range, const char *plist)
{
int result = 0;
struct prefix group;
struct in_addr rp_addr;
if (group_range == NULL)
result = str2prefix("224.0.0.0/4", &group);
else {
result = str2prefix(group_range, &group);
if (result) {
struct prefix temp;
prefix_copy(&temp, &group);
apply_mask(&temp);
if (!prefix_same(&group, &temp))
return PIM_GROUP_BAD_ADDR_MASK_COMBO;
}
}
if (!result)
return PIM_GROUP_BAD_ADDRESS;
result = inet_pton(AF_INET, rp, &rp_addr);
if (result <= 0)
return PIM_RP_BAD_ADDRESS;
result = pim_rp_new(pim, rp_addr, group, plist, RP_SRC_STATIC);
return result;
}
int pim_rp_new(struct pim_instance *pim, struct in_addr rp_addr,
struct prefix group, const char *plist,
enum rp_source rp_src_flag)
{
int result = 0;
char rp[INET_ADDRSTRLEN];
struct rp_info *rp_info;
struct rp_info *rp_all;
struct prefix group_all;
struct listnode *node, *nnode;
struct rp_info *tmp_rp_info;
char buffer[BUFSIZ];
struct prefix nht_p;
struct route_node *rn;
struct pim_upstream *up;
struct listnode *upnode;
if (rp_addr.s_addr == INADDR_ANY ||
rp_addr.s_addr == INADDR_NONE)
return PIM_RP_BAD_ADDRESS;
rp_info = XCALLOC(MTYPE_PIM_RP, sizeof(*rp_info));
rp_info->rp.rpf_addr.family = AF_INET;
rp_info->rp.rpf_addr.prefixlen = IPV4_MAX_PREFIXLEN;
rp_info->rp.rpf_addr.u.prefix4 = rp_addr;
prefix_copy(&rp_info->group, &group);
rp_info->rp_src = rp_src_flag;
inet_ntop(AF_INET, &rp_info->rp.rpf_addr.u.prefix4, rp, sizeof(rp));
if (plist) {
/*
* Return if the prefix-list is already configured for this RP
*/
if (pim_rp_find_prefix_list(pim, rp_info->rp.rpf_addr.u.prefix4,
plist)) {
XFREE(MTYPE_PIM_RP, rp_info);
return PIM_SUCCESS;
}
/*
* Barf if the prefix-list is already configured for an RP
*/
if (pim_rp_prefix_list_used(pim, plist)) {
XFREE(MTYPE_PIM_RP, rp_info);
return PIM_RP_PFXLIST_IN_USE;
}
/*
* Free any existing rp_info entries for this RP
*/
for (ALL_LIST_ELEMENTS(pim->rp_list, node, nnode,
tmp_rp_info)) {
if (rp_info->rp.rpf_addr.u.prefix4.s_addr
== tmp_rp_info->rp.rpf_addr.u.prefix4.s_addr) {
if (tmp_rp_info->plist)
pim_rp_del_config(pim, rp, NULL,
tmp_rp_info->plist);
else
pim_rp_del_config(
pim, rp,
prefix2str(&tmp_rp_info->group,
buffer, BUFSIZ),
NULL);
}
}
rp_info->plist = XSTRDUP(MTYPE_PIM_FILTER_NAME, plist);
} else {
if (!str2prefix("224.0.0.0/4", &group_all)) {
XFREE(MTYPE_PIM_RP, rp_info);
return PIM_GROUP_BAD_ADDRESS;
}
rp_all = pim_rp_find_match_group(pim, &group_all);
/*
* Barf if group is a non-multicast subnet
*/
if (!prefix_match(&rp_all->group, &rp_info->group)) {
XFREE(MTYPE_PIM_RP, rp_info);
return PIM_GROUP_BAD_ADDRESS;
}
/*
* Remove any prefix-list rp_info entries for this RP
*/
for (ALL_LIST_ELEMENTS(pim->rp_list, node, nnode,
tmp_rp_info)) {
if (tmp_rp_info->plist
&& rp_info->rp.rpf_addr.u.prefix4.s_addr
== tmp_rp_info->rp.rpf_addr.u.prefix4
.s_addr) {
pim_rp_del_config(pim, rp, NULL,
tmp_rp_info->plist);
}
}
/*
* Take over the 224.0.0.0/4 group if the rp is INADDR_NONE
*/
if (prefix_same(&rp_all->group, &rp_info->group)
&& pim_rpf_addr_is_inaddr_none(&rp_all->rp)) {
rp_all->rp.rpf_addr = rp_info->rp.rpf_addr;
rp_all->rp_src = rp_src_flag;
XFREE(MTYPE_PIM_RP, rp_info);
/* Register addr with Zebra NHT */
nht_p.family = AF_INET;
nht_p.prefixlen = IPV4_MAX_BITLEN;
nht_p.u.prefix4 =
rp_all->rp.rpf_addr.u.prefix4; // RP address
if (PIM_DEBUG_PIM_NHT_RP) {
char buf[PREFIX2STR_BUFFER];
char buf1[PREFIX2STR_BUFFER];
prefix2str(&nht_p, buf, sizeof(buf));
prefix2str(&rp_all->group, buf1, sizeof(buf1));
zlog_debug(
"%s: NHT Register rp_all addr %s grp %s ",
__PRETTY_FUNCTION__, buf, buf1);
}
for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode,
up)) {
/* Find (*, G) upstream whose RP is not
* configured yet
*/
if ((up->upstream_addr.s_addr == INADDR_ANY)
&& (up->sg.src.s_addr == INADDR_ANY)) {
struct prefix grp;
struct rp_info *trp_info;
grp.family = AF_INET;
grp.prefixlen = IPV4_MAX_BITLEN;
grp.u.prefix4 = up->sg.grp;
trp_info = pim_rp_find_match_group(
pim, &grp);
if (trp_info == rp_all)
pim_upstream_update(pim, up);
}
}
pim_rp_check_interfaces(pim, rp_all);
pim_rp_refresh_group_to_rp_mapping(pim);
pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_all,
false, NULL);
if (!pim_ecmp_nexthop_lookup(pim,
&rp_all->rp.source_nexthop,
&nht_p, &rp_all->group, 1))
return PIM_RP_NO_PATH;
return PIM_SUCCESS;
}
/*
* Return if the group is already configured for this RP
*/
tmp_rp_info = pim_rp_find_exact(
pim, rp_info->rp.rpf_addr.u.prefix4, &rp_info->group);
if (tmp_rp_info) {
if ((tmp_rp_info->rp_src != rp_src_flag)
&& (rp_src_flag == RP_SRC_STATIC))
tmp_rp_info->rp_src = rp_src_flag;
XFREE(MTYPE_PIM_RP, rp_info);
return result;
}
/*
* Barf if this group is already covered by some other RP
*/
tmp_rp_info = pim_rp_find_match_group(pim, &rp_info->group);
if (tmp_rp_info) {
if (tmp_rp_info->plist) {
XFREE(MTYPE_PIM_RP, rp_info);
return PIM_GROUP_PFXLIST_OVERLAP;
} else {
/*
* If the only RP that covers this group is an
* RP configured for
* 224.0.0.0/4 that is fine, ignore that one.
* For all others
* though we must return PIM_GROUP_OVERLAP
*/
if (prefix_same(&rp_info->group,
&tmp_rp_info->group)) {
if ((rp_src_flag == RP_SRC_STATIC)
&& (tmp_rp_info->rp_src
== RP_SRC_STATIC)) {
XFREE(MTYPE_PIM_RP, rp_info);
return PIM_GROUP_OVERLAP;
}
result = pim_rp_change(
pim,
rp_info->rp.rpf_addr.u.prefix4,
tmp_rp_info->group,
rp_src_flag);
XFREE(MTYPE_PIM_RP, rp_info);
return result;
}
}
}
}
listnode_add_sort(pim->rp_list, rp_info);
rn = route_node_get(pim->rp_table, &rp_info->group);
rn->info = rp_info;
if (PIM_DEBUG_TRACE) {
char buf[PREFIX_STRLEN];
zlog_debug("Allocated: %p for rp_info: %p(%s) Lock: %d", rn,
rp_info,
prefix2str(&rp_info->group, buf, sizeof(buf)),
rn->lock);
}
for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) {
if (up->sg.src.s_addr == INADDR_ANY) {
struct prefix grp;
struct rp_info *trp_info;
grp.family = AF_INET;
grp.prefixlen = IPV4_MAX_BITLEN;
grp.u.prefix4 = up->sg.grp;
trp_info = pim_rp_find_match_group(pim, &grp);
if (trp_info == rp_info)
pim_upstream_update(pim, up);
}
}
pim_rp_check_interfaces(pim, rp_info);
pim_rp_refresh_group_to_rp_mapping(pim);
/* Register addr with Zebra NHT */
nht_p.family = AF_INET;
nht_p.prefixlen = IPV4_MAX_BITLEN;
nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4;
if (PIM_DEBUG_PIM_NHT_RP) {
char buf[PREFIX2STR_BUFFER];
char buf1[PREFIX2STR_BUFFER];
prefix2str(&nht_p, buf, sizeof(buf));
prefix2str(&rp_info->group, buf1, sizeof(buf1));
zlog_debug("%s: NHT Register RP addr %s grp %s with Zebra ",
__PRETTY_FUNCTION__, buf, buf1);
}
pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, NULL);
if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, &nht_p,
&rp_info->group, 1))
return PIM_RP_NO_PATH;
return PIM_SUCCESS;
}
int pim_rp_del_config(struct pim_instance *pim, const char *rp,
const char *group_range, const char *plist)
{
struct prefix group;
struct in_addr rp_addr;
int result;
if (group_range == NULL)
result = str2prefix("224.0.0.0/4", &group);
else
result = str2prefix(group_range, &group);
if (!result)
return PIM_GROUP_BAD_ADDRESS;
result = inet_pton(AF_INET, rp, &rp_addr);
if (result <= 0)
return PIM_RP_BAD_ADDRESS;
result = pim_rp_del(pim, rp_addr, group, plist, RP_SRC_STATIC);
return result;
}
int pim_rp_del(struct pim_instance *pim, struct in_addr rp_addr,
struct prefix group, const char *plist,
enum rp_source rp_src_flag)
{
struct prefix g_all;
struct rp_info *rp_info;
struct rp_info *rp_all;
struct prefix nht_p;
struct route_node *rn;
bool was_plist = false;
struct rp_info *trp_info;
struct pim_upstream *up;
struct listnode *upnode;
struct bsgrp_node *bsgrp = NULL;
struct bsm_rpinfo *bsrp = NULL;
char grp_str[PREFIX2STR_BUFFER];
char rp_str[INET_ADDRSTRLEN];
if (!inet_ntop(AF_INET, &rp_addr, rp_str, sizeof(rp_str)))
sprintf(rp_str, "<rp?>");
prefix2str(&group, grp_str, sizeof(grp_str));
if (plist)
rp_info = pim_rp_find_prefix_list(pim, rp_addr, plist);
else
rp_info = pim_rp_find_exact(pim, rp_addr, &group);
if (!rp_info)
return PIM_RP_NOT_FOUND;
if (rp_info->plist) {
XFREE(MTYPE_PIM_FILTER_NAME, rp_info->plist);
was_plist = true;
}
if (PIM_DEBUG_TRACE)
zlog_debug("%s: Delete RP %s for the group %s",
__PRETTY_FUNCTION__, rp_str, grp_str);
/* While static RP is getting deleted, we need to check if dynamic RP
* present for the same group in BSM RP table, then install the dynamic
* RP for the group node into the main rp table
*/
if (rp_src_flag == RP_SRC_STATIC) {
bsgrp = pim_bsm_get_bsgrp_node(&pim->global_scope, &group);
if (bsgrp) {
bsrp = listnode_head(bsgrp->bsrp_list);
if (bsrp) {
if (PIM_DEBUG_TRACE) {
char bsrp_str[INET_ADDRSTRLEN];
if (!inet_ntop(AF_INET, bsrp, bsrp_str,
sizeof(bsrp_str)))
sprintf(bsrp_str, "<bsrp?>");
zlog_debug("%s: BSM RP %s found for the group %s",
__PRETTY_FUNCTION__,
bsrp_str, grp_str);
}
return pim_rp_change(pim, bsrp->rp_address,
group, RP_SRC_BSR);
}
} else {
if (PIM_DEBUG_TRACE)
zlog_debug(
"%s: BSM RP not found for the group %s",
__PRETTY_FUNCTION__, grp_str);
}
}
/* Deregister addr with Zebra NHT */
nht_p.family = AF_INET;
nht_p.prefixlen = IPV4_MAX_BITLEN;
nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4;
if (PIM_DEBUG_PIM_NHT_RP) {
char buf[PREFIX2STR_BUFFER];
prefix2str(&nht_p, buf, sizeof(buf));
zlog_debug("%s: Deregister RP addr %s with Zebra ",
__PRETTY_FUNCTION__, buf);
}
pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info, false);
if (!str2prefix("224.0.0.0/4", &g_all))
return PIM_RP_BAD_ADDRESS;
rp_all = pim_rp_find_match_group(pim, &g_all);
if (rp_all == rp_info) {
for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) {
/* Find the upstream (*, G) whose upstream address is
* same as the deleted RP
*/
if ((up->upstream_addr.s_addr
== rp_info->rp.rpf_addr.u.prefix4.s_addr)
&& (up->sg.src.s_addr == INADDR_ANY)) {
struct prefix grp;
grp.family = AF_INET;
grp.prefixlen = IPV4_MAX_BITLEN;
grp.u.prefix4 = up->sg.grp;
trp_info = pim_rp_find_match_group(pim, &grp);
if (trp_info == rp_all) {
pim_upstream_rpf_clear(pim, up);
up->upstream_addr.s_addr = INADDR_ANY;
}
}
}
rp_all->rp.rpf_addr.family = AF_INET;
rp_all->rp.rpf_addr.u.prefix4.s_addr = INADDR_NONE;
rp_all->i_am_rp = 0;
return PIM_SUCCESS;
}
listnode_delete(pim->rp_list, rp_info);
if (!was_plist) {
rn = route_node_get(pim->rp_table, &rp_info->group);
if (rn) {
if (rn->info != rp_info)
flog_err(
EC_LIB_DEVELOPMENT,
"Expected rn->info to be equal to rp_info");
if (PIM_DEBUG_TRACE) {
char buf[PREFIX_STRLEN];
zlog_debug(
"%s:Found for Freeing: %p for rp_info: %p(%s) Lock: %d",
__PRETTY_FUNCTION__, rn, rp_info,
prefix2str(&rp_info->group, buf,
sizeof(buf)),
rn->lock);
}
rn->info = NULL;
route_unlock_node(rn);
route_unlock_node(rn);
}
}
pim_rp_refresh_group_to_rp_mapping(pim);
for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) {
/* Find the upstream (*, G) whose upstream address is same as
* the deleted RP
*/
if ((up->upstream_addr.s_addr
== rp_info->rp.rpf_addr.u.prefix4.s_addr)
&& (up->sg.src.s_addr == INADDR_ANY)) {
struct prefix grp;
grp.family = AF_INET;
grp.prefixlen = IPV4_MAX_BITLEN;
grp.u.prefix4 = up->sg.grp;
trp_info = pim_rp_find_match_group(pim, &grp);
/* RP not found for the group grp */
if (pim_rpf_addr_is_inaddr_none(&trp_info->rp)) {
pim_upstream_rpf_clear(pim, up);
pim_rp_set_upstream_addr(
pim, &up->upstream_addr, up->sg.src,
up->sg.grp);
}
/* RP found for the group grp */
else
pim_upstream_update(pim, up);
}
}
XFREE(MTYPE_PIM_RP, rp_info);
return PIM_SUCCESS;
}
int pim_rp_change(struct pim_instance *pim, struct in_addr new_rp_addr,
struct prefix group, enum rp_source rp_src_flag)
{
struct prefix nht_p;
struct route_node *rn;
int result = 0;
struct rp_info *rp_info = NULL;
struct pim_upstream *up;
struct listnode *upnode;
rn = route_node_lookup(pim->rp_table, &group);
if (!rn) {
result = pim_rp_new(pim, new_rp_addr, group, NULL, rp_src_flag);
return result;
}
rp_info = rn->info;
if (!rp_info) {
route_unlock_node(rn);
result = pim_rp_new(pim, new_rp_addr, group, NULL, rp_src_flag);
return result;
}
if (rp_info->rp.rpf_addr.u.prefix4.s_addr == new_rp_addr.s_addr) {
if (rp_info->rp_src != rp_src_flag) {
rp_info->rp_src = rp_src_flag;
route_unlock_node(rn);
return PIM_SUCCESS;
}
}
/* Deregister old RP addr with Zebra NHT */
if (rp_info->rp.rpf_addr.u.prefix4.s_addr != INADDR_ANY) {
nht_p.family = AF_INET;
nht_p.prefixlen = IPV4_MAX_BITLEN;
nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4;
if (PIM_DEBUG_PIM_NHT_RP) {
char buf[PREFIX2STR_BUFFER];
prefix2str(&nht_p, buf, sizeof(buf));
zlog_debug("%s: Deregister RP addr %s with Zebra ",
__PRETTY_FUNCTION__, buf);
}
pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info, false);
}
pim_rp_nexthop_del(rp_info);
listnode_delete(pim->rp_list, rp_info);
/* Update the new RP address*/
rp_info->rp.rpf_addr.u.prefix4 = new_rp_addr;
rp_info->rp_src = rp_src_flag;
rp_info->i_am_rp = 0;
listnode_add_sort(pim->rp_list, rp_info);
for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) {
if (up->sg.src.s_addr == INADDR_ANY) {
struct prefix grp;
struct rp_info *trp_info;
grp.family = AF_INET;
grp.prefixlen = IPV4_MAX_BITLEN;
grp.u.prefix4 = up->sg.grp;
trp_info = pim_rp_find_match_group(pim, &grp);
if (trp_info == rp_info)
pim_upstream_update(pim, up);
}
}
/* Register new RP addr with Zebra NHT */
nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4;
if (PIM_DEBUG_PIM_NHT_RP) {
char buf[PREFIX2STR_BUFFER];
char buf1[PREFIX2STR_BUFFER];
prefix2str(&nht_p, buf, sizeof(buf));
prefix2str(&rp_info->group, buf1, sizeof(buf1));
zlog_debug("%s: NHT Register RP addr %s grp %s with Zebra ",
__PRETTY_FUNCTION__, buf, buf1);
}
pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, NULL);
if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, &nht_p,
&rp_info->group, 1)) {
route_unlock_node(rn);
return PIM_RP_NO_PATH;
}
pim_rp_check_interfaces(pim, rp_info);
route_unlock_node(rn);
pim_rp_refresh_group_to_rp_mapping(pim);
return result;
}
void pim_rp_setup(struct pim_instance *pim)
{
struct listnode *node;
struct rp_info *rp_info;
struct prefix nht_p;