-
Notifications
You must be signed in to change notification settings - Fork 24
/
ip6_mroute.c
1860 lines (1636 loc) · 43.2 KB
/
ip6_mroute.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
/* $NetBSD: ip6_mroute.c,v 1.7.8.1 1999/12/27 18:36:25 wrstuden Exp $ */
/*
* Copyright (C) 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* BSDI ip_mroute.c,v 2.10 1996/11/14 00:29:52 jch Exp */
/*
* IP multicast forwarding procedures
*
* Written by David Waitzman, BBN Labs, August 1988.
* Modified by Steve Deering, Stanford, February 1989.
* Modified by Mark J. Steiglitz, Stanford, May, 1991
* Modified by Van Jacobson, LBL, January 1993
* Modified by Ajit Thyagarajan, PARC, August 1993
* Modified by Bill Fenenr, PARC, April 1994
*
* MROUTING Revision: 3.5.1.2 + PIM-SMv2 (pimd) Support
*/
#if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__)
#include "opt_inet.h"
#endif
#ifndef _KERNEL
# ifdef KERNEL
# define _KERNEL
# endif
#endif
#include <sys/param.h>
#include <sys/systm.h>
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
#include <sys/malloc.h>
#endif
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sockio.h>
#include <sys/protosw.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/kernel.h>
#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
#include <sys/ioctl.h>
#endif
#include <sys/syslog.h>
#include <net/if.h>
#include <net/route.h>
#include <net/raw_cb.h>
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet6/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet6/ip6_mroute.h>
#include <netinet6/pim6.h>
#include <netinet6/pim6_var.h>
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
static MALLOC_DEFINE(M_MRTABLE, "mf6c", "multicast forwarding cache entry");
#endif
#define M_HASCL(m) ((m)->m_flags & M_EXT)
static int ip6_mdq __P((struct mbuf *, struct ifnet *, struct mf6c *));
static void phyint_send __P((struct ip6_hdr *, struct mif6 *, struct mbuf *));
static int set_pim6 __P((int *));
#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
static int get_pim6 __P((struct mbuf *));
#endif
static int socket_send __P((struct socket *, struct mbuf *,
struct sockaddr_in6 *));
static int register_send __P((struct ip6_hdr *, struct mif6 *,
struct mbuf *));
/*
* Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static,
* except for netstat or debugging purposes.
*/
struct socket *ip6_mrouter = NULL;
int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */
struct mrt6stat mrt6stat;
#define NO_RTE_FOUND 0x1
#define RTE_FOUND 0x2
struct mf6c *mf6ctable[MF6CTBLSIZ];
u_char nexpire[MF6CTBLSIZ];
static struct mif6 mif6table[MAXMIFS];
#ifdef MRT6DEBUG
u_int mrt6debug = 0; /* debug level */
#define DEBUG_MFC 0x02
#define DEBUG_FORWARD 0x04
#define DEBUG_EXPIRE 0x08
#define DEBUG_XMIT 0x10
#define DEBUG_REG 0x20
#define DEBUG_PIM 0x40
#endif
static void expire_upcalls __P((void *));
#define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */
#define UPCALL_EXPIRE 6 /* number of timeouts */
#ifdef INET
#ifdef MROUTING
extern struct socket *ip_mrouter;
#endif
#endif
/*
* 'Interfaces' associated with decapsulator (so we can tell
* packets that went through it from ones that get reflected
* by a broken gateway). These interfaces are never linked into
* the system ifnet list & no routes point to them. I.e., packets
* can't be sent this way. They only exist as a placeholder for
* multicast source verification.
*/
struct ifnet multicast_register_if;
#define ENCAP_HOPS 64
/*
* Private variables.
*/
static mifi_t nummifs = 0;
static mifi_t reg_mif_num = (mifi_t)-1;
static struct pim6stat pim6stat;
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
static struct callout_handle expire_upcalls_ch;
#endif
/*
* one-back cache used by ipip_input to locate a tunnel's mif
* given a datagram's src ip address.
*/
static int pim6;
/*
* Hash function for a source, group entry
*/
#define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \
(a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \
(g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \
(g).s6_addr32[2] ^ (g).s6_addr32[3])
/*
* Find a route for a given origin IPv6 address and Multicast group address.
* Quality of service parameter to be added in the future!!!
*/
#define MF6CFIND(o, g, rt) { \
register struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \
rt = NULL; \
mrt6stat.mrt6s_mfc_lookups++; \
while (_rt) { \
if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \
IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \
(_rt->mf6c_stall == NULL)) { \
rt = _rt; \
break; \
} \
_rt = _rt->mf6c_next; \
} \
if (rt == NULL) { \
mrt6stat.mrt6s_mfc_misses++; \
} \
}
/*
* Macros to compute elapsed time efficiently
* Borrowed from Van Jacobson's scheduling code
*/
#define TV_DELTA(a, b, delta) { \
register int xxs; \
\
delta = (a).tv_usec - (b).tv_usec; \
if ((xxs = (a).tv_sec - (b).tv_sec)) { \
switch (xxs) { \
case 2: \
delta += 1000000; \
/* fall through */ \
case 1: \
delta += 1000000; \
break; \
default: \
delta += (1000000 * xxs); \
} \
} \
}
#define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \
(a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec)
#ifdef UPCALL_TIMING
#define UPCALL_MAX 50
u_long upcall_data[UPCALL_MAX + 1];
static void collate();
#endif /* UPCALL_TIMING */
static int get_sg_cnt __P((struct sioc_sg_req6 *));
static int get_mif6_cnt __P((struct sioc_mif_req6 *));
static int ip6_mrouter_init __P((struct socket *, struct mbuf *));
static int add_m6if __P((struct mif6ctl *));
static int del_m6if __P((mifi_t *));
static int add_m6fc __P((struct mf6cctl *));
static int del_m6fc __P((struct mf6cctl *));
/*
* Handle MRT setsockopt commands to modify the multicast routing tables.
*/
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
int
ip6_mrouter_set(so, sopt)
struct socket *so;
struct sockopt *sopt;
{
int error = 0;
struct mbuf *m;
if (so != ip6_mrouter && sopt->sopt_name != MRT6_INIT)
return (EACCES);
if (error = soopt_getm(sopt, &m)) /* XXX */
return (error);
if (error = soopt_mcopyin(sopt, m)) /* XXX */
return (error);
switch (sopt->sopt_name) {
case MRT6_INIT:
error = ip6_mrouter_init(so, m);
break;
case MRT6_DONE:
error = ip6_mrouter_done();
break;
case MRT6_ADD_MIF:
error = add_m6if(mtod(m, struct mif6ctl *));
break;
case MRT6_DEL_MIF:
error = del_m6if(mtod(m, mifi_t *));
break;
case MRT6_ADD_MFC:
error = add_m6fc(mtod(m, struct mf6cctl *));
break;
case MRT6_DEL_MFC:
error = del_m6fc(mtod(m, struct mf6cctl *));
break;
case MRT6_PIM:
error = set_pim6(mtod(m, int *));
break;
default:
error = EOPNOTSUPP;
break;
}
(void)m_freem(m);
return(error);
}
#else
int
ip6_mrouter_set(cmd, so, m)
int cmd;
struct socket *so;
struct mbuf *m;
{
if (cmd != MRT6_INIT && so != ip6_mrouter)
return EACCES;
switch (cmd) {
case MRT6_INIT: return ip6_mrouter_init(so, m);
case MRT6_DONE: return ip6_mrouter_done();
case MRT6_ADD_MIF: return add_m6if(mtod(m, struct mif6ctl *));
case MRT6_DEL_MIF: return del_m6if(mtod(m, mifi_t *));
case MRT6_ADD_MFC: return add_m6fc(mtod(m, struct mf6cctl *));
case MRT6_DEL_MFC: return del_m6fc(mtod(m, struct mf6cctl *));
case MRT6_PIM: return set_pim6(mtod(m, int *));
default: return EOPNOTSUPP;
}
}
#endif
/*
* Handle MRT getsockopt commands
*/
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
int
ip6_mrouter_get(so, sopt)
struct socket *so;
struct sockopt *sopt;
{
int error = 0;
if (so != ip6_mrouter) return EACCES;
switch (sopt->sopt_name) {
case MRT6_PIM:
error = sooptcopyout(sopt, &pim6, sizeof(pim6));
break;
}
return (error);
}
#else
int
ip6_mrouter_get(cmd, so, m)
int cmd;
struct socket *so;
struct mbuf **m;
{
struct mbuf *mb;
if (so != ip6_mrouter) return EACCES;
*m = mb = m_get(M_WAIT, MT_SOOPTS);
switch (cmd) {
case MRT6_PIM: return get_pim6(mb);
default:
m_free(mb);
return EOPNOTSUPP;
}
}
#endif
/*
* Handle ioctl commands to obtain information from the cache
*/
int
mrt6_ioctl(cmd, data)
int cmd;
caddr_t data;
{
int error = 0;
switch (cmd) {
case SIOCGETSGCNT_IN6:
return(get_sg_cnt((struct sioc_sg_req6 *)data));
break; /* for safety */
case SIOCGETMIFCNT_IN6:
return(get_mif6_cnt((struct sioc_mif_req6 *)data));
break; /* for safety */
default:
return (EINVAL);
break;
}
return error;
}
/*
* returns the packet, byte, rpf-failure count for the source group provided
*/
static int
get_sg_cnt(req)
register struct sioc_sg_req6 *req;
{
register struct mf6c *rt;
int s;
#ifdef __NetBSD__
s = splsoftnet();
#else
s = splnet();
#endif
MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt);
splx(s);
if (rt != NULL) {
req->pktcnt = rt->mf6c_pkt_cnt;
req->bytecnt = rt->mf6c_byte_cnt;
req->wrong_if = rt->mf6c_wrong_if;
} else
return(ESRCH);
#if 0
req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff;
#endif
return 0;
}
/*
* returns the input and output packet and byte counts on the mif provided
*/
static int
get_mif6_cnt(req)
register struct sioc_mif_req6 *req;
{
register mifi_t mifi = req->mifi;
if (mifi >= nummifs)
return EINVAL;
req->icount = mif6table[mifi].m6_pkt_in;
req->ocount = mif6table[mifi].m6_pkt_out;
req->ibytes = mif6table[mifi].m6_bytes_in;
req->obytes = mif6table[mifi].m6_bytes_out;
return 0;
}
#if !(defined(__FreeBSD__) && __FreeBSD__ >=3)
/*
* Get PIM processiong global
*/
static int
get_pim6(m)
struct mbuf *m;
{
int *i;
i = mtod(m, int *);
*i = pim6;
return 0;
}
#endif
static int
set_pim6(i)
int *i;
{
if ((*i != 1) && (*i != 0))
return EINVAL;
pim6 = *i;
return 0;
}
/*
* Enable multicast routing
*/
static int
ip6_mrouter_init(so, m)
struct socket *so;
struct mbuf *m;
{
int *v;
#ifdef MRT6DEBUG
if (mrt6debug)
log(LOG_DEBUG,
"ip6_mrouter_init: so_type = %d, pr_protocol = %d\n",
so->so_type, so->so_proto->pr_protocol);
#endif
if (so->so_type != SOCK_RAW ||
so->so_proto->pr_protocol != IPPROTO_ICMPV6)
return EOPNOTSUPP;
if (!m || (m->m_len != sizeof(int *)))
return ENOPROTOOPT;
v = mtod(m, int *);
if (*v != 1)
return ENOPROTOOPT;
if (ip6_mrouter != NULL) return EADDRINUSE;
ip6_mrouter = so;
bzero((caddr_t)mf6ctable, sizeof(mf6ctable));
bzero((caddr_t)nexpire, sizeof(nexpire));
pim6 = 0;/* used for stubbing out/in pim stuff */
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
expire_upcalls_ch =
#endif
timeout(expire_upcalls, (caddr_t)NULL, EXPIRE_TIMEOUT);
#ifdef MRT6DEBUG
if (mrt6debug)
log(LOG_DEBUG, "ip6_mrouter_init\n");
#endif
return 0;
}
/*
* Disable multicast routing
*/
int
ip6_mrouter_done()
{
mifi_t mifi;
int i;
struct ifnet *ifp;
struct in6_ifreq ifr;
struct mf6c *rt;
struct rtdetq *rte;
int s;
#ifdef __NetBSD__
s = splsoftnet();
#else
s = splnet();
#endif
/*
* For each phyint in use, disable promiscuous reception of all IPv6
* multicasts.
*/
#ifdef INET
#ifdef MROUTING
/*
* If there is still IPv4 multicast routing daemon,
* we remain interfaces to receive all muliticasted packets.
* XXX: there may be an interface in which the IPv4 multicast
* daemon is not interested...
*/
if (!ip_mrouter)
#endif
#endif
{
for (mifi = 0; mifi < nummifs; mifi++) {
if (mif6table[mifi].m6_ifp &&
!(mif6table[mifi].m6_flags & MIFF_REGISTER)) {
ifr.ifr_addr.sin6_family = AF_INET6;
ifr.ifr_addr.sin6_addr= in6addr_any;
ifp = mif6table[mifi].m6_ifp;
(*ifp->if_ioctl)(ifp, SIOCDELMULTI,
(caddr_t)&ifr);
}
}
}
#ifdef notyet
bzero((caddr_t)qtable, sizeof(qtable));
bzero((caddr_t)tbftable, sizeof(tbftable));
#endif
bzero((caddr_t)mif6table, sizeof(mif6table));
nummifs = 0;
pim6 = 0; /* used to stub out/in pim specific code */
untimeout(expire_upcalls, (caddr_t)NULL
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
, expire_upcalls_ch
#endif
);
/*
* Free all multicast forwarding cache entries.
*/
for (i = 0; i < MF6CTBLSIZ; i++) {
rt = mf6ctable[i];
while (rt) {
struct mf6c *frt;
for (rte = rt->mf6c_stall; rte != NULL; ) {
struct rtdetq *n = rte->next;
m_free(rte->m);
free(rte, M_MRTABLE);
rte = n;
}
frt = rt;
rt = rt->mf6c_next;
free(frt, M_MRTABLE);
}
}
bzero((caddr_t)mf6ctable, sizeof(mf6ctable));
/*
* Reset de-encapsulation cache
*/
reg_mif_num = -1;
ip6_mrouter = NULL;
splx(s);
#ifdef MRT6DEBUG
if (mrt6debug)
log(LOG_DEBUG, "ip6_mrouter_done\n");
#endif
return 0;
}
static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 };
/*
* Add a mif to the mif table
*/
static int
add_m6if(mifcp)
register struct mif6ctl *mifcp;
{
register struct mif6 *mifp;
struct ifnet *ifp;
#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
struct in6_ifreq ifr;
#endif
int error, s;
#ifdef notyet
struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi;
#endif
if (mifcp->mif6c_mifi >= MAXMIFS)
return EINVAL;
mifp = mif6table + mifcp->mif6c_mifi;
if (mifp->m6_ifp)
return EADDRINUSE; /* XXX: is it appropriate? */
if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi > if_index)
return ENXIO;
ifp = ifindex2ifnet[mifcp->mif6c_pifi];
if (mifcp->mif6c_flags & MIFF_REGISTER) {
if (reg_mif_num == (mifi_t)-1) {
#if defined(__NetBSD__) || defined(__OpenBSD__)
strcpy(multicast_register_if.if_xname,
"register_mif"); /* XXX */
#else
multicast_register_if.if_name = "register_mif";
#endif
multicast_register_if.if_flags |= IFF_LOOPBACK;
multicast_register_if.if_index = mifcp->mif6c_mifi;
reg_mif_num = mifcp->mif6c_mifi;
}
ifp = &multicast_register_if;
} /* if REGISTER */
else {
/* Make sure the interface supports multicast */
if ((ifp->if_flags & IFF_MULTICAST) == 0)
return EOPNOTSUPP;
#ifdef __NetBSD__
s = splsoftnet();
#else
s = splnet();
#endif
#if (defined(__FreeBSD__) && __FreeBSD__ >= 3)
error = if_allmulti(ifp, 1);
#else
/*
* Enable promiscuous reception of all IPv6 multicasts
* from the interface.
*/
ifr.ifr_addr.sin6_family = AF_INET6;
ifr.ifr_addr.sin6_addr = in6addr_any;
error = (*ifp->if_ioctl)(ifp, SIOCADDMULTI, (caddr_t)&ifr);
#endif
splx(s);
if (error)
return error;
}
#ifdef __NetBSD__
s = splsoftnet();
#else
s = splnet();
#endif
mifp->m6_flags = mifcp->mif6c_flags;
mifp->m6_ifp = ifp;
#ifdef notyet
/* scaling up here allows division by 1024 in critical code */
mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000;
#endif
/* initialize per mif pkt counters */
mifp->m6_pkt_in = 0;
mifp->m6_pkt_out = 0;
mifp->m6_bytes_in = 0;
mifp->m6_bytes_out = 0;
splx(s);
/* Adjust nummifs up if the mifi is higher than nummifs */
if (nummifs <= mifcp->mif6c_mifi)
nummifs = mifcp->mif6c_mifi + 1;
#ifdef MRT6DEBUG
if (mrt6debug)
log(LOG_DEBUG,
"add_mif #%d, phyint %s%d\n",
mifcp->mif6c_mifi,
ifp->if_name, ifp->if_unit);
#endif
return 0;
}
/*
* Delete a mif from the mif table
*/
static int
del_m6if(mifip)
mifi_t *mifip;
{
register struct mif6 *mifp = mif6table + *mifip;
register mifi_t mifi;
struct ifnet *ifp;
#if !(defined(__FreeBSD__) && __FreeBSD__ >= 3)
struct in6_ifreq ifr;
#endif
int s;
if (*mifip >= nummifs)
return EINVAL;
if (mifp->m6_ifp == NULL)
return EINVAL;
#ifdef __NetBSD__
s = splsoftnet();
#else
s = splnet();
#endif
if (!(mifp->m6_flags & MIFF_REGISTER)) {
/*
* XXX: what if there is yet IPv4 multicast daemon
* using the interface?
*/
ifp = mifp->m6_ifp;
#if (defined(__FreeBSD__) && __FreeBSD__ >= 3)
if_allmulti(ifp, 0);
#else
ifr.ifr_addr.sin6_family = AF_INET6;
ifr.ifr_addr.sin6_addr = in6addr_any;
(*ifp->if_ioctl)(ifp, SIOCDELMULTI, (caddr_t)&ifr);
#endif
}
#ifdef notyet
bzero((caddr_t)qtable[*mifip], sizeof(qtable[*mifip]));
bzero((caddr_t)mifp->m6_tbf, sizeof(*(mifp->m6_tbf)));
#endif
bzero((caddr_t)mifp, sizeof (*mifp));
/* Adjust nummifs down */
for (mifi = nummifs; mifi > 0; mifi--)
if (mif6table[mifi - 1].m6_ifp)
break;
nummifs = mifi;
splx(s);
#ifdef MRT6DEBUG
if (mrt6debug)
log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs);
#endif
return 0;
}
/*
* Add an mfc entry
*/
static int
add_m6fc(mfccp)
struct mf6cctl *mfccp;
{
struct mf6c *rt;
u_long hash;
struct rtdetq *rte;
register u_short nstl;
int s;
MF6CFIND(mfccp->mf6cc_origin.sin6_addr,
mfccp->mf6cc_mcastgrp.sin6_addr, rt);
/* If an entry already exists, just update the fields */
if (rt) {
#ifdef MRT6DEBUG
if (mrt6debug & DEBUG_MFC)
log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n",
ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
mfccp->mf6cc_parent);
#endif
#ifdef __NetBSD__
s = splsoftnet();
#else
s = splnet();
#endif
rt->mf6c_parent = mfccp->mf6cc_parent;
rt->mf6c_ifset = mfccp->mf6cc_ifset;
splx(s);
return 0;
}
/*
* Find the entry for which the upcall was made and update
*/
#ifdef __NetBSD__
s = splsoftnet();
#else
s = splnet();
#endif
hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr,
mfccp->mf6cc_mcastgrp.sin6_addr);
for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) {
if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr,
&mfccp->mf6cc_origin.sin6_addr) &&
IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr,
&mfccp->mf6cc_mcastgrp.sin6_addr) &&
(rt->mf6c_stall != NULL)) {
if (nstl++)
log(LOG_ERR,
"add_m6fc: %s o %s g %s p %x dbx %p\n",
"multiple kernel entries",
ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
mfccp->mf6cc_parent, rt->mf6c_stall);
#ifdef MRT6DEBUG
if (mrt6debug & DEBUG_MFC)
log(LOG_DEBUG,
"add_m6fc o %s g %s p %x dbg %x\n",
ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
mfccp->mf6cc_parent, rt->mf6c_stall);
#endif
rt->mf6c_origin = mfccp->mf6cc_origin;
rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
rt->mf6c_parent = mfccp->mf6cc_parent;
rt->mf6c_ifset = mfccp->mf6cc_ifset;
/* initialize pkt counters per src-grp */
rt->mf6c_pkt_cnt = 0;
rt->mf6c_byte_cnt = 0;
rt->mf6c_wrong_if = 0;
rt->mf6c_expire = 0; /* Don't clean this guy up */
nexpire[hash]--;
/* free packets Qed at the end of this entry */
for (rte = rt->mf6c_stall; rte != NULL; ) {
struct rtdetq *n = rte->next;
ip6_mdq(rte->m, rte->ifp, rt);
m_freem(rte->m);
#ifdef UPCALL_TIMING
collate(&(rte->t));
#endif /* UPCALL_TIMING */
free(rte, M_MRTABLE);
rte = n;
}
rt->mf6c_stall = NULL;
}
}
/*
* It is possible that an entry is being inserted without an upcall
*/
if (nstl == 0) {
#ifdef MRT6DEBUG
if (mrt6debug & DEBUG_MFC)
log(LOG_DEBUG,"add_mfc no upcall h %d o %s g %s p %x\n",
hash,
ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
mfccp->mf6cc_parent);
#endif
for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) {
if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr,
&mfccp->mf6cc_origin.sin6_addr)&&
IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr,
&mfccp->mf6cc_mcastgrp.sin6_addr)) {
rt->mf6c_origin = mfccp->mf6cc_origin;
rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
rt->mf6c_parent = mfccp->mf6cc_parent;
/* initialize pkt counters per src-grp */
rt->mf6c_pkt_cnt = 0;
rt->mf6c_byte_cnt = 0;
rt->mf6c_wrong_if = 0;
if (rt->mf6c_expire)
nexpire[hash]--;
rt->mf6c_expire = 0;
}
}
if (rt == NULL) {
/* no upcall, so make a new entry */
rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE,
M_NOWAIT);
if (rt == NULL) {
splx(s);
return ENOBUFS;
}
/* insert new entry at head of hash chain */
rt->mf6c_origin = mfccp->mf6cc_origin;
rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
rt->mf6c_parent = mfccp->mf6cc_parent;
/* initialize pkt counters per src-grp */
rt->mf6c_pkt_cnt = 0;
rt->mf6c_byte_cnt = 0;
rt->mf6c_wrong_if = 0;
rt->mf6c_expire = 0;
rt->mf6c_stall = NULL;
/* link into table */
rt->mf6c_next = mf6ctable[hash];
mf6ctable[hash] = rt;
}
}
splx(s);
return 0;
}
#ifdef UPCALL_TIMING
/*
* collect delay statistics on the upcalls
*/
static void
collate(t)
register struct timeval *t;
{
register u_long d;
register struct timeval tp;
register u_long delta;
GET_TIME(tp);
if (TV_LT(*t, tp))
{
TV_DELTA(tp, *t, delta);
d = delta >> 10;
if (d > UPCALL_MAX)
d = UPCALL_MAX;
++upcall_data[d];
}
}
#endif /* UPCALL_TIMING */
/*
* Delete an mfc entry
*/
static int
del_m6fc(mfccp)
struct mf6cctl *mfccp;
{
struct sockaddr_in6 origin;
struct sockaddr_in6 mcastgrp;
struct mf6c *rt;
struct mf6c **nptr;
u_long hash;
int s;
origin = mfccp->mf6cc_origin;
mcastgrp = mfccp->mf6cc_mcastgrp;
hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr);
#ifdef MRT6DEBUG
if (mrt6debug & DEBUG_MFC)
log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n",
ip6_sprintf(&origin.sin6_addr),
ip6_sprintf(&mcastgrp.sin6_addr));
#endif
#ifdef __NetBSD__
s = splsoftnet();
#else
s = splnet();
#endif
nptr = &mf6ctable[hash];
while ((rt = *nptr) != NULL) {
if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr,
&rt->mf6c_origin.sin6_addr) &&
IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr,