1 /* $NetBSD: ip6_mroute.c,v 1.96 2008/08/06 15:01:23 plunky Exp $ */
2 /* $KAME: ip6_mroute.c,v 1.49 2001/07/25 09:21:18 jinmei Exp $ */
3
4 /*
5 * Copyright (C) 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 /* BSDI ip_mroute.c,v 2.10 1996/11/14 00:29:52 jch Exp */
34
35 /*
36 * Copyright (c) 1992, 1993
37 * The Regents of the University of California. All rights reserved.
38 *
39 * This code is derived from software contributed to Berkeley by
40 * Stephen Deering of Stanford University.
41 *
42 * Redistribution and use in source and binary forms, with or without
43 * modification, are permitted provided that the following conditions
44 * are met:
45 * 1. Redistributions of source code must retain the above copyright
46 * notice, this list of conditions and the following disclaimer.
47 * 2. Redistributions in binary form must reproduce the above copyright
48 * notice, this list of conditions and the following disclaimer in the
49 * documentation and/or other materials provided with the distribution.
50 * 3. Neither the name of the University nor the names of its contributors
51 * may be used to endorse or promote products derived from this software
52 * without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 * SUCH DAMAGE.
65 *
66 * @(#)ip_mroute.c 8.2 (Berkeley) 11/15/93
67 */
68
69 /*
70 * Copyright (c) 1989 Stephen Deering
71 *
72 * This code is derived from software contributed to Berkeley by
73 * Stephen Deering of Stanford University.
74 *
75 * Redistribution and use in source and binary forms, with or without
76 * modification, are permitted provided that the following conditions
77 * are met:
78 * 1. Redistributions of source code must retain the above copyright
79 * notice, this list of conditions and the following disclaimer.
80 * 2. Redistributions in binary form must reproduce the above copyright
81 * notice, this list of conditions and the following disclaimer in the
82 * documentation and/or other materials provided with the distribution.
83 * 3. All advertising materials mentioning features or use of this software
84 * must display the following acknowledgement:
85 * This product includes software developed by the University of
86 * California, Berkeley and its contributors.
87 * 4. Neither the name of the University nor the names of its contributors
88 * may be used to endorse or promote products derived from this software
89 * without specific prior written permission.
90 *
91 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
92 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
94 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
95 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
96 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
97 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
98 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
99 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
100 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
101 * SUCH DAMAGE.
102 *
103 * @(#)ip_mroute.c 8.2 (Berkeley) 11/15/93
104 */
105
106 /*
107 * IP multicast forwarding procedures
108 *
109 * Written by David Waitzman, BBN Labs, August 1988.
110 * Modified by Steve Deering, Stanford, February 1989.
111 * Modified by Mark J. Steiglitz, Stanford, May, 1991
112 * Modified by Van Jacobson, LBL, January 1993
113 * Modified by Ajit Thyagarajan, PARC, August 1993
114 * Modified by Bill Fenner, PARC, April 1994
115 *
116 * MROUTING Revision: 3.5.1.2 + PIM-SMv2 (pimd) Support
117 */
118
119 #include <sys/cdefs.h>
120 __KERNEL_RCSID(0, "$NetBSD: ip6_mroute.c,v 1.96 2008/08/06 15:01:23 plunky Exp $");
121
122 #include "opt_inet.h"
123 #include "opt_mrouting.h"
124
125 #include <sys/param.h>
126 #include <sys/systm.h>
127 #include <sys/callout.h>
128 #include <sys/mbuf.h>
129 #include <sys/socket.h>
130 #include <sys/socketvar.h>
131 #include <sys/sockio.h>
132 #include <sys/protosw.h>
133 #include <sys/errno.h>
134 #include <sys/time.h>
135 #include <sys/kernel.h>
136 #include <sys/ioctl.h>
137 #include <sys/sysctl.h>
138 #include <sys/syslog.h>
139
140 #include <net/if.h>
141 #include <net/route.h>
142 #include <net/raw_cb.h>
143 #include <net/net_stats.h>
144
145 #include <netinet/in.h>
146 #include <netinet/in_var.h>
147 #include <netinet/icmp6.h>
148
149 #include <netinet/ip6.h>
150 #include <netinet6/ip6_var.h>
151 #include <netinet6/ip6_private.h>
152 #include <netinet6/ip6_mroute.h>
153 #include <netinet6/scope6_var.h>
154 #include <netinet6/pim6.h>
155 #include <netinet6/pim6_var.h>
156 #include <netinet6/nd6.h>
157
158 #include <net/net_osdep.h>
159
160 static int ip6_mdq(struct mbuf *, struct ifnet *, struct mf6c *);
161 static void phyint_send(struct ip6_hdr *, struct mif6 *, struct mbuf *);
162
163 static int set_pim6(int *);
164 static int socket_send(struct socket *, struct mbuf *,
165 struct sockaddr_in6 *);
166 static int register_send(struct ip6_hdr *, struct mif6 *, struct mbuf *);
167
168 /*
169 * Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static,
170 * except for netstat or debugging purposes.
171 */
172 struct socket *ip6_mrouter = NULL;
173 int ip6_mrouter_ver = 0;
174 int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */
175 struct mrt6stat mrt6stat;
176
177 #define NO_RTE_FOUND 0x1
178 #define RTE_FOUND 0x2
179
180 struct mf6c *mf6ctable[MF6CTBLSIZ];
181 u_char n6expire[MF6CTBLSIZ];
182 struct mif6 mif6table[MAXMIFS];
183 #ifdef MRT6DEBUG
184 u_int mrt6debug = 0; /* debug level */
185 #define DEBUG_MFC 0x02
186 #define DEBUG_FORWARD 0x04
187 #define DEBUG_EXPIRE 0x08
188 #define DEBUG_XMIT 0x10
189 #define DEBUG_REG 0x20
190 #define DEBUG_PIM 0x40
191 #endif
192
193 static void expire_upcalls(void *);
194 #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */
195 #define UPCALL_EXPIRE 6 /* number of timeouts */
196
197 #ifdef INET
198 #ifdef MROUTING
199 extern struct socket *ip_mrouter;
200 #endif
201 #endif
202
203 /*
204 * 'Interfaces' associated with decapsulator (so we can tell
205 * packets that went through it from ones that get reflected
206 * by a broken gateway). These interfaces are never linked into
207 * the system ifnet list & no routes point to them. I.e., packets
208 * can't be sent this way. They only exist as a placeholder for
209 * multicast source verification.
210 */
211 struct ifnet multicast_register_if6;
212
213 #define ENCAP_HOPS 64
214
215 /*
216 * Private variables.
217 */
218 static mifi_t nummifs = 0;
219 static mifi_t reg_mif_num = (mifi_t)-1;
220
221 static percpu_t *pim6stat_percpu;
222
223 #define PIM6_STATINC(x) _NET_STATINC(pim6stat_percpu, x)
224
225 static int pim6;
226
227 /*
228 * Hash function for a source, group entry
229 */
230 #define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \
231 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \
232 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \
233 (g).s6_addr32[2] ^ (g).s6_addr32[3])
234
235 /*
236 * Find a route for a given origin IPv6 address and Multicast group address.
237 * Quality of service parameter to be added in the future!!!
238 */
239
240 #define MF6CFIND(o, g, rt) do { \
241 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \
242 rt = NULL; \
243 mrt6stat.mrt6s_mfc_lookups++; \
244 while (_rt) { \
245 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \
246 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \
247 (_rt->mf6c_stall == NULL)) { \
248 rt = _rt; \
249 break; \
250 } \
251 _rt = _rt->mf6c_next; \
252 } \
253 if (rt == NULL) { \
254 mrt6stat.mrt6s_mfc_misses++; \
255 } \
256 } while (/*CONSTCOND*/ 0)
257
258 /*
259 * Macros to compute elapsed time efficiently
260 * Borrowed from Van Jacobson's scheduling code
261 */
262 #define TV_DELTA(a, b, delta) do { \
263 int xxs; \
264 \
265 delta = (a).tv_usec - (b).tv_usec; \
266 if ((xxs = (a).tv_sec - (b).tv_sec)) { \
267 switch (xxs) { \
268 case 2: \
269 delta += 1000000; \
270 /* FALLTHROUGH */ \
271 case 1: \
272 delta += 1000000; \
273 break; \
274 default: \
275 delta += (1000000 * xxs); \
276 } \
277 } \
278 } while (/*CONSTCOND*/ 0)
279
280 #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \
281 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec)
282
283 #ifdef UPCALL_TIMING
284 #define UPCALL_MAX 50
285 u_long upcall_data[UPCALL_MAX + 1];
286 static void collate();
287 #endif /* UPCALL_TIMING */
288
289 static int get_sg_cnt(struct sioc_sg_req6 *);
290 static int get_mif6_cnt(struct sioc_mif_req6 *);
291 static int ip6_mrouter_init(struct socket *, int, int);
292 static int add_m6if(struct mif6ctl *);
293 static int del_m6if(mifi_t *);
294 static int add_m6fc(struct mf6cctl *);
295 static int del_m6fc(struct mf6cctl *);
296
297 static callout_t expire_upcalls_ch;
298
299 void
300 pim6_init(void)
301 {
302
303 pim6stat_percpu = percpu_alloc(sizeof(uint64_t) * PIM6_NSTATS);
304 }
305
306 /*
307 * Handle MRT setsockopt commands to modify the multicast routing tables.
308 */
309 int
310 ip6_mrouter_set(struct socket *so, struct sockopt *sopt)
311 {
312 int error, optval;
313 struct mif6ctl mifc;
314 struct mf6cctl mfcc;
315 mifi_t mifi;
316
317 if (sopt->sopt_name != MRT6_INIT && so != ip6_mrouter)
318 return (EACCES);
319
320 error = 0;
321
322 switch (sopt->sopt_name) {
323 #ifdef MRT6_OINIT
324 case MRT6_OINIT:
325 #endif
326 case MRT6_INIT:
327 error = sockopt_getint(sopt, &optval);
328 if (error)
329 break;
330 return (ip6_mrouter_init(so, optval, sopt->sopt_name));
331 case MRT6_DONE:
332 return (ip6_mrouter_done());
333 case MRT6_ADD_MIF:
334 error = sockopt_get(sopt, &mifc, sizeof(mifc));
335 if (error)
336 break;
337 return (add_m6if(&mifc));
338 case MRT6_DEL_MIF:
339 error = sockopt_get(sopt, &mifi, sizeof(mifi));
340 if (error)
341 break;
342 return (del_m6if(&mifi));
343 case MRT6_ADD_MFC:
344 error = sockopt_get(sopt, &mfcc, sizeof(mfcc));
345 if (error)
346 break;
347 return (add_m6fc(&mfcc));
348 case MRT6_DEL_MFC:
349 error = sockopt_get(sopt, &mfcc, sizeof(mfcc));
350 if (error)
351 break;
352 return (del_m6fc(&mfcc));
353 case MRT6_PIM:
354 error = sockopt_getint(sopt, &optval);
355 if (error)
356 break;
357 return (set_pim6(&optval));
358 default:
359 error = EOPNOTSUPP;
360 }
361
362 return (error);
363 }
364
365 /*
366 * Handle MRT getsockopt commands
367 */
368 int
369 ip6_mrouter_get(struct socket *so, struct sockopt *sopt)
370 {
371 int error;
372
373 if (so != ip6_mrouter) return EACCES;
374
375 error = 0;
376
377 switch (sopt->sopt_name) {
378 case MRT6_PIM:
379 error = sockopt_set(sopt, &pim6, sizeof(pim6));
380 break;
381 default:
382 error = EOPNOTSUPP;
383 break;
384 }
385
386 return (error);
387 }
388
389 /*
390 * Handle ioctl commands to obtain information from the cache
391 */
392 int
393 mrt6_ioctl(u_long cmd, void *data)
394 {
395
396 switch (cmd) {
397 case SIOCGETSGCNT_IN6:
398 return (get_sg_cnt((struct sioc_sg_req6 *)data));
399 case SIOCGETMIFCNT_IN6:
400 return (get_mif6_cnt((struct sioc_mif_req6 *)data));
401 default:
402 return (EINVAL);
403 }
404 }
405
406 /*
407 * returns the packet, byte, rpf-failure count for the source group provided
408 */
409 static int
410 get_sg_cnt(struct sioc_sg_req6 *req)
411 {
412 struct mf6c *rt;
413 int s;
414
415 s = splsoftnet();
416 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt);
417 splx(s);
418 if (rt != NULL) {
419 req->pktcnt = rt->mf6c_pkt_cnt;
420 req->bytecnt = rt->mf6c_byte_cnt;
421 req->wrong_if = rt->mf6c_wrong_if;
422 } else
423 return (ESRCH);
424 #if 0
425 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff;
426 #endif
427
428 return 0;
429 }
430
431 /*
432 * returns the input and output packet and byte counts on the mif provided
433 */
434 static int
435 get_mif6_cnt(struct sioc_mif_req6 *req)
436 {
437 mifi_t mifi = req->mifi;
438
439 if (mifi >= nummifs)
440 return EINVAL;
441
442 req->icount = mif6table[mifi].m6_pkt_in;
443 req->ocount = mif6table[mifi].m6_pkt_out;
444 req->ibytes = mif6table[mifi].m6_bytes_in;
445 req->obytes = mif6table[mifi].m6_bytes_out;
446
447 return 0;
448 }
449
450 static int
451 set_pim6(int *i)
452 {
453 if ((*i != 1) && (*i != 0))
454 return EINVAL;
455
456 pim6 = *i;
457
458 return 0;
459 }
460
461 /*
462 * Enable multicast routing
463 */
464 static int
465 ip6_mrouter_init(struct socket *so, int v, int cmd)
466 {
467 #ifdef MRT6DEBUG
468 if (mrt6debug)
469 log(LOG_DEBUG,
470 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n",
471 so->so_type, so->so_proto->pr_protocol);
472 #endif
473
474 if (so->so_type != SOCK_RAW ||
475 so->so_proto->pr_protocol != IPPROTO_ICMPV6)
476 return (EOPNOTSUPP);
477
478 if (v != 1)
479 return (ENOPROTOOPT);
480
481 if (ip6_mrouter != NULL)
482 return (EADDRINUSE);
483
484 ip6_mrouter = so;
485 ip6_mrouter_ver = cmd;
486
487 bzero((void *)mf6ctable, sizeof(mf6ctable));
488 bzero((void *)n6expire, sizeof(n6expire));
489
490 pim6 = 0;/* used for stubbing out/in pim stuff */
491
492 callout_init(&expire_upcalls_ch, CALLOUT_MPSAFE);
493 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT,
494 expire_upcalls, NULL);
495
496 #ifdef MRT6DEBUG
497 if (mrt6debug)
498 log(LOG_DEBUG, "ip6_mrouter_init\n");
499 #endif
500
501 return 0;
502 }
503
504 /*
505 * Disable multicast routing
506 */
507 int
508 ip6_mrouter_done(void)
509 {
510 mifi_t mifi;
511 int i;
512 struct ifnet *ifp;
513 struct in6_ifreq ifr;
514 struct mf6c *rt;
515 struct rtdetq *rte;
516 int s;
517
518 s = splsoftnet();
519
520 /*
521 * For each phyint in use, disable promiscuous reception of all IPv6
522 * multicasts.
523 */
524 #ifdef INET
525 #ifdef MROUTING
526 /*
527 * If there is still IPv4 multicast routing daemon,
528 * we remain interfaces to receive all muliticasted packets.
529 * XXX: there may be an interface in which the IPv4 multicast
530 * daemon is not interested...
531 */
532 if (!ip_mrouter)
533 #endif
534 #endif
535 {
536 for (mifi = 0; mifi < nummifs; mifi++) {
537 if (mif6table[mifi].m6_ifp &&
538 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) {
539 ifr.ifr_addr.sin6_family = AF_INET6;
540 ifr.ifr_addr.sin6_addr= in6addr_any;
541 ifp = mif6table[mifi].m6_ifp;
542 (*ifp->if_ioctl)(ifp, SIOCDELMULTI, &ifr);
543 }
544 }
545 }
546 #ifdef notyet
547 bzero((void *)qtable, sizeof(qtable));
548 bzero((void *)tbftable, sizeof(tbftable));
549 #endif
550 bzero((void *)mif6table, sizeof(mif6table));
551 nummifs = 0;
552
553 pim6 = 0; /* used to stub out/in pim specific code */
554
555 callout_stop(&expire_upcalls_ch);
556
557 /*
558 * Free all multicast forwarding cache entries.
559 */
560 for (i = 0; i < MF6CTBLSIZ; i++) {
561 rt = mf6ctable[i];
562 while (rt) {
563 struct mf6c *frt;
564
565 for (rte = rt->mf6c_stall; rte != NULL; ) {
566 struct rtdetq *n = rte->next;
567
568 m_free(rte->m);
569 free(rte, M_MRTABLE);
570 rte = n;
571 }
572 frt = rt;
573 rt = rt->mf6c_next;
574 free(frt, M_MRTABLE);
575 }
576 }
577
578 bzero((void *)mf6ctable, sizeof(mf6ctable));
579
580 /*
581 * Reset register interface
582 */
583 if (reg_mif_num != (mifi_t)-1) {
584 if_detach(&multicast_register_if6);
585 reg_mif_num = (mifi_t)-1;
586 }
587
588 ip6_mrouter = NULL;
589 ip6_mrouter_ver = 0;
590
591 splx(s);
592
593 #ifdef MRT6DEBUG
594 if (mrt6debug)
595 log(LOG_DEBUG, "ip6_mrouter_done\n");
596 #endif
597
598 return 0;
599 }
600
601 void
602 ip6_mrouter_detach(struct ifnet *ifp)
603 {
604 struct rtdetq *rte;
605 struct mf6c *mfc;
606 mifi_t mifi;
607 int i;
608
609 if (ip6_mrouter == NULL)
610 return;
611
612 /*
613 * Delete a mif which points to ifp.
614 */
615 for (mifi = 0; mifi < nummifs; mifi++)
616 if (mif6table[mifi].m6_ifp == ifp)
617 del_m6if(&mifi);
618
619 /*
620 * Clear rte->ifp of cache entries received on ifp.
621 */
622 for (i = 0; i < MF6CTBLSIZ; i++) {
623 if (n6expire[i] == 0)
624 continue;
625
626 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) {
627 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) {
628 if (rte->ifp == ifp)
629 rte->ifp = NULL;
630 }
631 }
632 }
633 }
634
635
636 /*
637 * Add a mif to the mif table
638 */
639 static int
640 add_m6if(struct mif6ctl *mifcp)
641 {
642 struct mif6 *mifp;
643 struct ifnet *ifp;
644 struct in6_ifreq ifr;
645 int error, s;
646 #ifdef notyet
647 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi;
648 #endif
649
650 if (mifcp->mif6c_mifi >= MAXMIFS)
651 return EINVAL;
652 mifp = mif6table + mifcp->mif6c_mifi;
653 if (mifp->m6_ifp)
654 return EADDRINUSE; /* XXX: is it appropriate? */
655 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi >= if_indexlim)
656 return ENXIO;
657 /*
658 * XXX: some OSes can remove ifp and clear ifindex2ifnet[id]
659 * even for id between 0 and if_index.
660 */
661 if ((ifp = ifindex2ifnet[mifcp->mif6c_pifi]) == NULL)
662 return ENXIO;
663
664 if (mifcp->mif6c_flags & MIFF_REGISTER) {
665 ifp = &multicast_register_if6;
666
667 if (reg_mif_num == (mifi_t)-1) {
668 strlcpy(ifp->if_xname, "register_mif",
669 sizeof(ifp->if_xname));
670 ifp->if_flags |= IFF_LOOPBACK;
671 ifp->if_index = mifcp->mif6c_mifi;
672 reg_mif_num = mifcp->mif6c_mifi;
673 if_attach(ifp);
674 }
675
676 } /* if REGISTER */
677 else {
678 /* Make sure the interface supports multicast */
679 if ((ifp->if_flags & IFF_MULTICAST) == 0)
680 return EOPNOTSUPP;
681
682 s = splsoftnet();
683 /*
684 * Enable promiscuous reception of all IPv6 multicasts
685 * from the interface.
686 */
687 ifr.ifr_addr.sin6_family = AF_INET6;
688 ifr.ifr_addr.sin6_addr = in6addr_any;
689 error = (*ifp->if_ioctl)(ifp, SIOCADDMULTI, &ifr);
690 splx(s);
691 if (error)
692 return error;
693 }
694
695 s = splsoftnet();
696 mifp->m6_flags = mifcp->mif6c_flags;
697 mifp->m6_ifp = ifp;
698 #ifdef notyet
699 /* scaling up here allows division by 1024 in critical code */
700 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000;
701 #endif
702 /* initialize per mif pkt counters */
703 mifp->m6_pkt_in = 0;
704 mifp->m6_pkt_out = 0;
705 mifp->m6_bytes_in = 0;
706 mifp->m6_bytes_out = 0;
707 splx(s);
708
709 /* Adjust nummifs up if the mifi is higher than nummifs */
710 if (nummifs <= mifcp->mif6c_mifi)
711 nummifs = mifcp->mif6c_mifi + 1;
712
713 #ifdef MRT6DEBUG
714 if (mrt6debug)
715 log(LOG_DEBUG,
716 "add_mif #%d, phyint %s\n",
717 mifcp->mif6c_mifi, ifp->if_xname);
718 #endif
719
720 return 0;
721 }
722
723 /*
724 * Delete a mif from the mif table
725 */
726 static int
727 del_m6if(mifi_t *mifip)
728 {
729 struct mif6 *mifp = mif6table + *mifip;
730 mifi_t mifi;
731 struct ifnet *ifp;
732 struct in6_ifreq ifr;
733 int s;
734
735 if (*mifip >= nummifs)
736 return EINVAL;
737 if (mifp->m6_ifp == NULL)
738 return EINVAL;
739
740 s = splsoftnet();
741
742 if (!(mifp->m6_flags & MIFF_REGISTER)) {
743 /*
744 * XXX: what if there is yet IPv4 multicast daemon
745 * using the interface?
746 */
747 ifp = mifp->m6_ifp;
748
749 ifr.ifr_addr.sin6_family = AF_INET6;
750 ifr.ifr_addr.sin6_addr = in6addr_any;
751 (*ifp->if_ioctl)(ifp, SIOCDELMULTI, &ifr);
752 } else {
753 if (reg_mif_num != (mifi_t)-1) {
754 if_detach(&multicast_register_if6);
755 reg_mif_num = (mifi_t)-1;
756 }
757 }
758
759 #ifdef notyet
760 bzero((void *)qtable[*mifip], sizeof(qtable[*mifip]));
761 bzero((void *)mifp->m6_tbf, sizeof(*(mifp->m6_tbf)));
762 #endif
763 bzero((void *)mifp, sizeof (*mifp));
764
765 /* Adjust nummifs down */
766 for (mifi = nummifs; mifi > 0; mifi--)
767 if (mif6table[mifi - 1].m6_ifp)
768 break;
769 nummifs = mifi;
770
771 splx(s);
772
773 #ifdef MRT6DEBUG
774 if (mrt6debug)
775 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs);
776 #endif
777
778 return 0;
779 }
780
781 /*
782 * Add an mfc entry
783 */
784 static int
785 add_m6fc(struct mf6cctl *mfccp)
786 {
787 struct mf6c *rt;
788 u_long hash;
789 struct rtdetq *rte;
790 u_short nstl;
791 int s;
792
793 MF6CFIND(mfccp->mf6cc_origin.sin6_addr,
794 mfccp->mf6cc_mcastgrp.sin6_addr, rt);
795
796 /* If an entry already exists, just update the fields */
797 if (rt) {
798 #ifdef MRT6DEBUG
799 if (mrt6debug & DEBUG_MFC)
800 log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n",
801 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
802 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
803 mfccp->mf6cc_parent);
804 #endif
805
806 s = splsoftnet();
807 rt->mf6c_parent = mfccp->mf6cc_parent;
808 rt->mf6c_ifset = mfccp->mf6cc_ifset;
809 splx(s);
810 return 0;
811 }
812
813 /*
814 * Find the entry for which the upcall was made and update
815 */
816 s = splsoftnet();
817 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr,
818 mfccp->mf6cc_mcastgrp.sin6_addr);
819 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) {
820 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr,
821 &mfccp->mf6cc_origin.sin6_addr) &&
822 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr,
823 &mfccp->mf6cc_mcastgrp.sin6_addr) &&
824 (rt->mf6c_stall != NULL)) {
825
826 if (nstl++)
827 log(LOG_ERR,
828 "add_m6fc: %s o %s g %s p %x dbx %p\n",
829 "multiple kernel entries",
830 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
831 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
832 mfccp->mf6cc_parent, rt->mf6c_stall);
833
834 #ifdef MRT6DEBUG
835 if (mrt6debug & DEBUG_MFC)
836 log(LOG_DEBUG,
837 "add_m6fc o %s g %s p %x dbg %p\n",
838 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
839 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
840 mfccp->mf6cc_parent, rt->mf6c_stall);
841 #endif
842
843 rt->mf6c_origin = mfccp->mf6cc_origin;
844 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
845 rt->mf6c_parent = mfccp->mf6cc_parent;
846 rt->mf6c_ifset = mfccp->mf6cc_ifset;
847 /* initialize pkt counters per src-grp */
848 rt->mf6c_pkt_cnt = 0;
849 rt->mf6c_byte_cnt = 0;
850 rt->mf6c_wrong_if = 0;
851
852 rt->mf6c_expire = 0; /* Don't clean this guy up */
853 n6expire[hash]--;
854
855 /* free packets Qed at the end of this entry */
856 for (rte = rt->mf6c_stall; rte != NULL; ) {
857 struct rtdetq *n = rte->next;
858 if (rte->ifp) {
859 ip6_mdq(rte->m, rte->ifp, rt);
860 }
861 m_freem(rte->m);
862 #ifdef UPCALL_TIMING
863 collate(&(rte->t));
864 #endif /* UPCALL_TIMING */
865 free(rte, M_MRTABLE);
866 rte = n;
867 }
868 rt->mf6c_stall = NULL;
869 }
870 }
871
872 /*
873 * It is possible that an entry is being inserted without an upcall
874 */
875 if (nstl == 0) {
876 #ifdef MRT6DEBUG
877 if (mrt6debug & DEBUG_MFC)
878 log(LOG_DEBUG,
879 "add_mfc no upcall h %ld o %s g %s p %x\n",
880 hash,
881 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
882 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
883 mfccp->mf6cc_parent);
884 #endif
885
886 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) {
887
888 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr,
889 &mfccp->mf6cc_origin.sin6_addr)&&
890 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr,
891 &mfccp->mf6cc_mcastgrp.sin6_addr)) {
892
893 rt->mf6c_origin = mfccp->mf6cc_origin;
894 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
895 rt->mf6c_parent = mfccp->mf6cc_parent;
896 rt->mf6c_ifset = mfccp->mf6cc_ifset;
897 /* initialize pkt counters per src-grp */
898 rt->mf6c_pkt_cnt = 0;
899 rt->mf6c_byte_cnt = 0;
900 rt->mf6c_wrong_if = 0;
901
902 if (rt->mf6c_expire)
903 n6expire[hash]--;
904 rt->mf6c_expire = 0;
905 }
906 }
907 if (rt == NULL) {
908 /* no upcall, so make a new entry */
909 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE,
910 M_NOWAIT);
911 if (rt == NULL) {
912 splx(s);
913 return ENOBUFS;
914 }
915
916 /* insert new entry at head of hash chain */
917 rt->mf6c_origin = mfccp->mf6cc_origin;
918 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
919 rt->mf6c_parent = mfccp->mf6cc_parent;
920 rt->mf6c_ifset = mfccp->mf6cc_ifset;
921 /* initialize pkt counters per src-grp */
922 rt->mf6c_pkt_cnt = 0;
923 rt->mf6c_byte_cnt = 0;
924 rt->mf6c_wrong_if = 0;
925 rt->mf6c_expire = 0;
926 rt->mf6c_stall = NULL;
927
928 /* link into table */
929 rt->mf6c_next = mf6ctable[hash];
930 mf6ctable[hash] = rt;
931 }
932 }
933 splx(s);
934 return 0;
935 }
936
937 #ifdef UPCALL_TIMING
938 /*
939 * collect delay statistics on the upcalls
940 */
941 static void
942 collate(struct timeval *t)
943 {
944 u_long d;
945 struct timeval tp;
946 u_long delta;
947
948 GET_TIME(tp);
949
950 if (TV_LT(*t, tp))
951 {
952 TV_DELTA(tp, *t, delta);
953
954 d = delta >> 10;
955 if (d > UPCALL_MAX)
956 d = UPCALL_MAX;
957
958 ++upcall_data[d];
959 }
960 }
961 #endif /* UPCALL_TIMING */
962
963 /*
964 * Delete an mfc entry
965 */
966 static int
967 del_m6fc(struct mf6cctl *mfccp)
968 {
969 struct sockaddr_in6 origin;
970 struct sockaddr_in6 mcastgrp;
971 struct mf6c *rt;
972 struct mf6c **nptr;
973 u_long hash;
974 int s;
975
976 origin = mfccp->mf6cc_origin;
977 mcastgrp = mfccp->mf6cc_mcastgrp;
978 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr);
979
980 #ifdef MRT6DEBUG
981 if (mrt6debug & DEBUG_MFC)
982 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n",
983 ip6_sprintf(&origin.sin6_addr),
984 ip6_sprintf(&mcastgrp.sin6_addr));
985 #endif
986
987 s = splsoftnet();
988
989 nptr = &mf6ctable[hash];
990 while ((rt = *nptr) != NULL) {
991 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr,
992 &rt->mf6c_origin.sin6_addr) &&
993 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr,
994 &rt->mf6c_mcastgrp.sin6_addr) &&
995 rt->mf6c_stall == NULL)
996 break;
997
998 nptr = &rt->mf6c_next;
999 }
1000 if (rt == NULL) {
1001 splx(s);
1002 return EADDRNOTAVAIL;
1003 }
1004
1005 *nptr = rt->mf6c_next;
1006 free(rt, M_MRTABLE);
1007
1008 splx(s);
1009
1010 return 0;
1011 }
1012
1013 static int
1014 socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src)
1015 {
1016 if (s) {
1017 if (sbappendaddr(&s->so_rcv,
1018 (struct sockaddr *)src,
1019 mm, (struct mbuf *)0) != 0) {
1020 sorwakeup(s);
1021 return 0;
1022 }
1023 }
1024 m_freem(mm);
1025 return -1;
1026 }
1027
1028 /*
1029 * IPv6 multicast forwarding function. This function assumes that the packet
1030 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface
1031 * pointed to by "ifp", and the packet is to be relayed to other networks
1032 * that have members of the packet's destination IPv6 multicast group.
1033 *
1034 * The packet is returned unscathed to the caller, unless it is
1035 * erroneous, in which case a non-zero return value tells the caller to
1036 * discard it.
1037 */
1038
1039 int
1040 ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m)
1041 {
1042 struct mf6c *rt;
1043 struct mif6 *mifp;
1044 struct mbuf *mm;
1045 int s;
1046 mifi_t mifi;
1047 struct sockaddr_in6 sin6;
1048
1049 #ifdef MRT6DEBUG
1050 if (mrt6debug & DEBUG_FORWARD)
1051 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n",
1052 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst),
1053 ifp->if_index);
1054 #endif
1055
1056 /*
1057 * Don't forward a packet with Hop limit of zero or one,
1058 * or a packet destined to a local-only group.
1059 */
1060 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_NODELOCAL(&ip6->ip6_dst) ||
1061 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst))
1062 return 0;
1063 ip6->ip6_hlim--;
1064
1065 /*
1066 * Source address check: do not forward packets with unspecified
1067 * source. It was discussed in July 2000, on ipngwg mailing list.
1068 * This is rather more serious than unicast cases, because some
1069 * MLD packets can be sent with the unspecified source address
1070 * (although such packets must normally set the hop limit field to 1).
1071 */
1072 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) {
1073 IP6_STATINC(IP6_STAT_CANTFORWARD);
1074 if (ip6_log_time + ip6_log_interval < time_second) {
1075 ip6_log_time = time_second;
1076 log(LOG_DEBUG,
1077 "cannot forward "
1078 "from %s to %s nxt %d received on %s\n",
1079 ip6_sprintf(&ip6->ip6_src),
1080 ip6_sprintf(&ip6->ip6_dst),
1081 ip6->ip6_nxt,
1082 m->m_pkthdr.rcvif ?
1083 if_name(m->m_pkthdr.rcvif) : "?");
1084 }
1085 return 0;
1086 }
1087
1088 /*
1089 * Determine forwarding mifs from the forwarding cache table
1090 */
1091 s = splsoftnet();
1092 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt);
1093
1094 /* Entry exists, so forward if necessary */
1095 if (rt) {
1096 splx(s);
1097 return (ip6_mdq(m, ifp, rt));
1098 } else {
1099 /*
1100 * If we don't have a route for packet's origin,
1101 * Make a copy of the packet &
1102 * send message to routing daemon
1103 */
1104
1105 struct mbuf *mb0;
1106 struct rtdetq *rte;
1107 u_long hash;
1108 /* int i, npkts;*/
1109 #ifdef UPCALL_TIMING
1110 struct timeval tp;
1111
1112 GET_TIME(tp);
1113 #endif /* UPCALL_TIMING */
1114
1115 mrt6stat.mrt6s_no_route++;
1116 #ifdef MRT6DEBUG
1117 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC))
1118 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n",
1119 ip6_sprintf(&ip6->ip6_src),
1120 ip6_sprintf(&ip6->ip6_dst));
1121 #endif
1122
1123 /*
1124 * Allocate mbufs early so that we don't do extra work if we
1125 * are just going to fail anyway.
1126 */
1127 rte = (struct rtdetq *)malloc(sizeof(*rte), M_MRTABLE,
1128 M_NOWAIT);
1129 if (rte == NULL) {
1130 splx(s);
1131 return ENOBUFS;
1132 }
1133 mb0 = m_copy(m, 0, M_COPYALL);
1134 /*
1135 * Pullup packet header if needed before storing it,
1136 * as other references may modify it in the meantime.
1137 */
1138 if (mb0 &&
1139 (M_READONLY(mb0) || mb0->m_len < sizeof(struct ip6_hdr)))
1140 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr));
1141 if (mb0 == NULL) {
1142 free(rte, M_MRTABLE);
1143 splx(s);
1144 return ENOBUFS;
1145 }
1146
1147 /* is there an upcall waiting for this packet? */
1148 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst);
1149 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) {
1150 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src,
1151 &rt->mf6c_origin.sin6_addr) &&
1152 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1153 &rt->mf6c_mcastgrp.sin6_addr) &&
1154 (rt->mf6c_stall != NULL))
1155 break;
1156 }
1157
1158 if (rt == NULL) {
1159 struct mrt6msg *im;
1160 struct omrt6msg *oim;
1161
1162 /* no upcall, so make a new entry */
1163 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE,
1164 M_NOWAIT);
1165 if (rt == NULL) {
1166 free(rte, M_MRTABLE);
1167 m_freem(mb0);
1168 splx(s);
1169 return ENOBUFS;
1170 }
1171 /*
1172 * Make a copy of the header to send to the user
1173 * level process
1174 */
1175 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr));
1176
1177 if (mm == NULL) {
1178 free(rte, M_MRTABLE);
1179 m_freem(mb0);
1180 free(rt, M_MRTABLE);
1181 splx(s);
1182 return ENOBUFS;
1183 }
1184
1185 /*
1186 * Send message to routing daemon
1187 */
1188 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0);
1189
1190 im = NULL;
1191 oim = NULL;
1192 switch (ip6_mrouter_ver) {
1193 case MRT6_OINIT:
1194 oim = mtod(mm, struct omrt6msg *);
1195 oim->im6_msgtype = MRT6MSG_NOCACHE;
1196 oim->im6_mbz = 0;
1197 break;
1198 case MRT6_INIT:
1199 im = mtod(mm, struct mrt6msg *);
1200 im->im6_msgtype = MRT6MSG_NOCACHE;
1201 im->im6_mbz = 0;
1202 break;
1203 default:
1204 free(rte, M_MRTABLE);
1205 m_freem(mb0);
1206 free(rt, M_MRTABLE);
1207 splx(s);
1208 return EINVAL;
1209 }
1210
1211 #ifdef MRT6DEBUG
1212 if (mrt6debug & DEBUG_FORWARD)
1213 log(LOG_DEBUG,
1214 "getting the iif info in the kernel\n");
1215 #endif
1216
1217 for (mifp = mif6table, mifi = 0;
1218 mifi < nummifs && mifp->m6_ifp != ifp;
1219 mifp++, mifi++)
1220 ;
1221
1222 switch (ip6_mrouter_ver) {
1223 case MRT6_OINIT:
1224 oim->im6_mif = mifi;
1225 break;
1226 case MRT6_INIT:
1227 im->im6_mif = mifi;
1228 break;
1229 }
1230
1231 if (socket_send(ip6_mrouter, mm, &sin6) < 0) {
1232 log(LOG_WARNING, "ip6_mforward: ip6_mrouter "
1233 "socket queue full\n");
1234 mrt6stat.mrt6s_upq_sockfull++;
1235 free(rte, M_MRTABLE);
1236 m_freem(mb0);
1237 free(rt, M_MRTABLE);
1238 splx(s);
1239 return ENOBUFS;
1240 }
1241
1242 mrt6stat.mrt6s_upcalls++;
1243
1244 /* insert new entry at head of hash chain */
1245 bzero(rt, sizeof(*rt));
1246 sockaddr_in6_init(&rt->mf6c_origin, &ip6->ip6_src,
1247 0, 0, 0);
1248 sockaddr_in6_init(&rt->mf6c_mcastgrp, &ip6->ip6_dst,
1249 0, 0, 0);
1250 rt->mf6c_expire = UPCALL_EXPIRE;
1251 n6expire[hash]++;
1252 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT;
1253
1254 /* link into table */
1255 rt->mf6c_next = mf6ctable[hash];
1256 mf6ctable[hash] = rt;
1257 /* Add this entry to the end of the queue */
1258 rt->mf6c_stall = rte;
1259 } else {
1260 /* determine if q has overflowed */
1261 struct rtdetq **p;
1262 int npkts = 0;
1263
1264 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next)
1265 if (++npkts > MAX_UPQ6) {
1266 mrt6stat.mrt6s_upq_ovflw++;
1267 free(rte, M_MRTABLE);
1268 m_freem(mb0);
1269 splx(s);
1270 return 0;
1271 }
1272
1273 /* Add this entry to the end of the queue */
1274 *p = rte;
1275 }
1276
1277 rte->next = NULL;
1278 rte->m = mb0;
1279 rte->ifp = ifp;
1280 #ifdef UPCALL_TIMING
1281 rte->t = tp;
1282 #endif /* UPCALL_TIMING */
1283
1284 splx(s);
1285
1286 return 0;
1287 }
1288 }
1289
1290 /*
1291 * Clean up cache entries if upcalls are not serviced
1292 * Call from the Slow Timeout mechanism, every 0.25 seconds.
1293 */
1294 static void
1295 expire_upcalls(void *unused)
1296 {
1297 struct rtdetq *rte;
1298 struct mf6c *mfc, **nptr;
1299 int i;
1300
1301 mutex_enter(softnet_lock);
1302 KERNEL_LOCK(1, NULL);
1303
1304 for (i = 0; i < MF6CTBLSIZ; i++) {
1305 if (n6expire[i] == 0)
1306 continue;
1307 nptr = &mf6ctable[i];
1308 while ((mfc = *nptr) != NULL) {
1309 rte = mfc->mf6c_stall;
1310 /*
1311 * Skip real cache entries
1312 * Make sure it wasn't marked to not expire (shouldn't happen)
1313 * If it expires now
1314 */
1315 if (rte != NULL &&
1316 mfc->mf6c_expire != 0 &&
1317 --mfc->mf6c_expire == 0) {
1318 #ifdef MRT6DEBUG
1319 if (mrt6debug & DEBUG_EXPIRE)
1320 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n",
1321 ip6_sprintf(&mfc->mf6c_origin.sin6_addr),
1322 ip6_sprintf(&mfc->mf6c_mcastgrp.sin6_addr));
1323 #endif
1324 /*
1325 * drop all the packets
1326 * free the mbuf with the pkt, if, timing info
1327 */
1328 do {
1329 struct rtdetq *n = rte->next;
1330 m_freem(rte->m);
1331 free(rte, M_MRTABLE);
1332 rte = n;
1333 } while (rte != NULL);
1334 mrt6stat.mrt6s_cache_cleanups++;
1335 n6expire[i]--;
1336
1337 *nptr = mfc->mf6c_next;
1338 free(mfc, M_MRTABLE);
1339 } else {
1340 nptr = &mfc->mf6c_next;
1341 }
1342 }
1343 }
1344 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT,
1345 expire_upcalls, NULL);
1346
1347 KERNEL_UNLOCK_ONE(NULL);
1348 mutex_exit(softnet_lock);
1349 }
1350
1351 /*
1352 * Packet forwarding routine once entry in the cache is made
1353 */
1354 static int
1355 ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt)
1356 {
1357 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1358 mifi_t mifi, iif;
1359 struct mif6 *mifp;
1360 int plen = m->m_pkthdr.len;
1361 struct in6_addr src0, dst0; /* copies for local work */
1362 u_int32_t iszone, idzone, oszone, odzone;
1363 int error = 0;
1364
1365 /*
1366 * Macro to send packet on mif. Since RSVP packets don't get counted on
1367 * input, they shouldn't get counted on output, so statistics keeping is
1368 * separate.
1369 */
1370
1371 #define MC6_SEND(ip6, mifp, m) do { \
1372 if ((mifp)->m6_flags & MIFF_REGISTER) \
1373 register_send((ip6), (mifp), (m)); \
1374 else \
1375 phyint_send((ip6), (mifp), (m)); \
1376 } while (/*CONSTCOND*/ 0)
1377
1378 /*
1379 * Don't forward if it didn't arrive from the parent mif
1380 * for its origin.
1381 */
1382 mifi = rt->mf6c_parent;
1383 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) {
1384 /* came in the wrong interface */
1385 #ifdef MRT6DEBUG
1386 if (mrt6debug & DEBUG_FORWARD)
1387 log(LOG_DEBUG,
1388 "wrong if: ifid %d mifi %d mififid %x\n",
1389 ifp->if_index, mifi,
1390 mif6table[mifi].m6_ifp ?
1391 mif6table[mifi].m6_ifp->if_index : -1);
1392 #endif
1393 mrt6stat.mrt6s_wrong_if++;
1394 rt->mf6c_wrong_if++;
1395 /*
1396 * If we are doing PIM processing, and we are forwarding
1397 * packets on this interface, send a message to the
1398 * routing daemon.
1399 */
1400 /* have to make sure this is a valid mif */
1401 if (mifi < nummifs && mif6table[mifi].m6_ifp)
1402 if (pim6 && (m->m_flags & M_LOOP) == 0) {
1403 /*
1404 * Check the M_LOOP flag to avoid an
1405 * unnecessary PIM assert.
1406 * XXX: M_LOOP is an ad-hoc hack...
1407 */
1408 struct sockaddr_in6 sin6;
1409
1410 struct mbuf *mm;
1411 struct mrt6msg *im;
1412 struct omrt6msg *oim;
1413
1414 mm = m_copy(m, 0, sizeof(struct ip6_hdr));
1415 if (mm &&
1416 (M_READONLY(mm) ||
1417 mm->m_len < sizeof(struct ip6_hdr)))
1418 mm = m_pullup(mm, sizeof(struct ip6_hdr));
1419 if (mm == NULL)
1420 return ENOBUFS;
1421
1422 oim = NULL;
1423 im = NULL;
1424 switch (ip6_mrouter_ver) {
1425 case MRT6_OINIT:
1426 oim = mtod(mm, struct omrt6msg *);
1427 oim->im6_msgtype = MRT6MSG_WRONGMIF;
1428 oim->im6_mbz = 0;
1429 break;
1430 case MRT6_INIT:
1431 im = mtod(mm, struct mrt6msg *);
1432 im->im6_msgtype = MRT6MSG_WRONGMIF;
1433 im->im6_mbz = 0;
1434 break;
1435 default:
1436 m_freem(mm);
1437 return EINVAL;
1438 }
1439
1440 for (mifp = mif6table, iif = 0;
1441 iif < nummifs && mifp &&
1442 mifp->m6_ifp != ifp;
1443 mifp++, iif++)
1444 ;
1445
1446 bzero(&sin6, sizeof(sin6));
1447 sin6.sin6_len = sizeof(sin6);
1448 sin6.sin6_family = AF_INET6;
1449 switch (ip6_mrouter_ver) {
1450 case MRT6_OINIT:
1451 oim->im6_mif = iif;
1452 sin6.sin6_addr = oim->im6_src;
1453 break;
1454 case MRT6_INIT:
1455 im->im6_mif = iif;
1456 sin6.sin6_addr = im->im6_src;
1457 break;
1458 }
1459
1460 mrt6stat.mrt6s_upcalls++;
1461
1462 if (socket_send(ip6_mrouter, mm, &sin6) < 0) {
1463 #ifdef MRT6DEBUG
1464 if (mrt6debug)
1465 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n");
1466 #endif
1467 ++mrt6stat.mrt6s_upq_sockfull;
1468 return ENOBUFS;
1469 } /* if socket Q full */
1470 } /* if PIM */
1471 return 0;
1472 } /* if wrong iif */
1473
1474 /* If I sourced this packet, it counts as output, else it was input. */
1475 if (m->m_pkthdr.rcvif == NULL) {
1476 /* XXX: is rcvif really NULL when output?? */
1477 mif6table[mifi].m6_pkt_out++;
1478 mif6table[mifi].m6_bytes_out += plen;
1479 } else {
1480 mif6table[mifi].m6_pkt_in++;
1481 mif6table[mifi].m6_bytes_in += plen;
1482 }
1483 rt->mf6c_pkt_cnt++;
1484 rt->mf6c_byte_cnt += plen;
1485
1486 /*
1487 * For each mif, forward a copy of the packet if there are group
1488 * members downstream on the interface.
1489 */
1490 src0 = ip6->ip6_src;
1491 dst0 = ip6->ip6_dst;
1492 if ((error = in6_setscope(&src0, ifp, &iszone)) != 0 ||
1493 (error = in6_setscope(&dst0, ifp, &idzone)) != 0) {
1494 IP6_STATINC(IP6_STAT_BADSCOPE);
1495 return (error);
1496 }
1497 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++)
1498 if (IF_ISSET(mifi, &rt->mf6c_ifset)) {
1499 if (mif6table[mifi].m6_ifp == NULL)
1500 continue;
1501 /*
1502 * check if the outgoing packet is going to break
1503 * a scope boundary.
1504 * XXX: For packets through PIM register tunnel
1505 * interface, we believe the routing daemon.
1506 */
1507 if ((mif6table[rt->mf6c_parent].m6_flags &
1508 MIFF_REGISTER) == 0 &&
1509 (mif6table[mifi].m6_flags & MIFF_REGISTER) == 0) {
1510 if (in6_setscope(&src0, mif6table[mifi].m6_ifp,
1511 &oszone) ||
1512 in6_setscope(&dst0, mif6table[mifi].m6_ifp,
1513 &odzone) ||
1514 iszone != oszone || idzone != odzone) {
1515 IP6_STATINC(IP6_STAT_BADSCOPE);
1516 continue;
1517 }
1518 }
1519
1520 mifp->m6_pkt_out++;
1521 mifp->m6_bytes_out += plen;
1522 MC6_SEND(ip6, mifp, m);
1523 }
1524 return 0;
1525 }
1526
1527 static void
1528 phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m)
1529 {
1530 struct mbuf *mb_copy;
1531 struct ifnet *ifp = mifp->m6_ifp;
1532 int error = 0;
1533 int s;
1534 static struct route ro;
1535 struct in6_multi *in6m;
1536 struct sockaddr_in6 dst6;
1537 u_long linkmtu;
1538
1539 s = splsoftnet();
1540 /*
1541 * Make a new reference to the packet; make sure that
1542 * the IPv6 header is actually copied, not just referenced,
1543 * so that ip6_output() only scribbles on the copy.
1544 */
1545 mb_copy = m_copy(m, 0, M_COPYALL);
1546 if (mb_copy &&
1547 (M_READONLY(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr)))
1548 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr));
1549 if (mb_copy == NULL) {
1550 splx(s);
1551 return;
1552 }
1553 /* set MCAST flag to the outgoing packet */
1554 mb_copy->m_flags |= M_MCAST;
1555
1556 /*
1557 * If we sourced the packet, call ip6_output since we may divide
1558 * the packet into fragments when the packet is too big for the
1559 * outgoing interface.
1560 * Otherwise, we can simply send the packet to the interface
1561 * sending queue.
1562 */
1563 if (m->m_pkthdr.rcvif == NULL) {
1564 struct ip6_moptions im6o;
1565
1566 im6o.im6o_multicast_ifp = ifp;
1567 /* XXX: ip6_output will override ip6->ip6_hlim */
1568 im6o.im6o_multicast_hlim = ip6->ip6_hlim;
1569 im6o.im6o_multicast_loop = 1;
1570 error = ip6_output(mb_copy, NULL, &ro, IPV6_FORWARDING,
1571 &im6o, NULL, NULL);
1572
1573 #ifdef MRT6DEBUG
1574 if (mrt6debug & DEBUG_XMIT)
1575 log(LOG_DEBUG, "phyint_send on mif %d err %d\n",
1576 mifp - mif6table, error);
1577 #endif
1578 splx(s);
1579 return;
1580 }
1581
1582 /*
1583 * If we belong to the destination multicast group
1584 * on the outgoing interface, loop back a copy.
1585 */
1586 /*
1587 * Does not have to check source info, as it's alreay covered by
1588 * ip6_input
1589 */
1590 sockaddr_in6_init(&dst6, &ip6->ip6_dst, 0, 0, 0);
1591
1592 IN6_LOOKUP_MULTI(ip6->ip6_dst, ifp, in6m);
1593 if (in6m != NULL) {
1594 ip6_mloopback(ifp, m,
1595 satocsin6(rtcache_getdst(&ro)));
1596 }
1597
1598 /*
1599 * Put the packet into the sending queue of the outgoing interface
1600 * if it would fit in the MTU of the interface.
1601 */
1602 linkmtu = IN6_LINKMTU(ifp);
1603 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) {
1604 /*
1605 * We could call if_output directly here, but we use
1606 * nd6_output on purpose to see if IPv6 operation is allowed
1607 * on the interface.
1608 */
1609 error = nd6_output(ifp, ifp, mb_copy, &dst6, NULL);
1610 #ifdef MRT6DEBUG
1611 if (mrt6debug & DEBUG_XMIT)
1612 log(LOG_DEBUG, "phyint_send on mif %d err %d\n",
1613 mifp - mif6table, error);
1614 #endif
1615 } else {
1616 /*
1617 * pMTU discovery is intentionally disabled by default, since
1618 * various router may notify pMTU in multicast, which can be
1619 * a DDoS to a router
1620 */
1621 if (ip6_mcast_pmtu)
1622 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu);
1623 else {
1624 #ifdef MRT6DEBUG
1625 if (mrt6debug & DEBUG_XMIT)
1626 log(LOG_DEBUG,
1627 "phyint_send: packet too big on %s o %s g %s"
1628 " size %d(discarded)\n",
1629 if_name(ifp),
1630 ip6_sprintf(&ip6->ip6_src),
1631 ip6_sprintf(&ip6->ip6_dst),
1632 mb_copy->m_pkthdr.len);
1633 #endif /* MRT6DEBUG */
1634 m_freem(mb_copy); /* simply discard the packet */
1635 }
1636 }
1637
1638 splx(s);
1639 }
1640
1641 static int
1642 register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m)
1643 {
1644 struct mbuf *mm;
1645 int i, len = m->m_pkthdr.len;
1646 struct sockaddr_in6 sin6;
1647 struct mrt6msg *im6;
1648
1649 #ifdef MRT6DEBUG
1650 if (mrt6debug)
1651 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n",
1652 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst));
1653 #endif
1654 PIM6_STATINC(PIM6_STAT_SND_REGISTERS);
1655
1656 /* Make a copy of the packet to send to the user level process */
1657 MGETHDR(mm, M_DONTWAIT, MT_HEADER);
1658 if (mm == NULL)
1659 return ENOBUFS;
1660 mm->m_data += max_linkhdr;
1661 mm->m_len = sizeof(struct ip6_hdr);
1662
1663 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) {
1664 m_freem(mm);
1665 return ENOBUFS;
1666 }
1667 i = MHLEN - M_LEADINGSPACE(mm);
1668 if (i > len)
1669 i = len;
1670 mm = m_pullup(mm, i);
1671 if (mm == NULL)
1672 return ENOBUFS;
1673 /* TODO: check it! */
1674 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr);
1675
1676 /*
1677 * Send message to routing daemon
1678 */
1679 sockaddr_in6_init(&sin6, &ip6->ip6_src, 0, 0, 0);
1680
1681 im6 = mtod(mm, struct mrt6msg *);
1682 im6->im6_msgtype = MRT6MSG_WHOLEPKT;
1683 im6->im6_mbz = 0;
1684
1685 im6->im6_mif = mif - mif6table;
1686
1687 /* iif info is not given for reg. encap.n */
1688 mrt6stat.mrt6s_upcalls++;
1689
1690 if (socket_send(ip6_mrouter, mm, &sin6) < 0) {
1691 #ifdef MRT6DEBUG
1692 if (mrt6debug)
1693 log(LOG_WARNING,
1694 "register_send: ip6_mrouter socket queue full\n");
1695 #endif
1696 ++mrt6stat.mrt6s_upq_sockfull;
1697 return ENOBUFS;
1698 }
1699 return 0;
1700 }
1701
1702 /*
1703 * PIM sparse mode hook
1704 * Receives the pim control messages, and passes them up to the listening
1705 * socket, using rip6_input.
1706 * The only message processed is the REGISTER pim message; the pim header
1707 * is stripped off, and the inner packet is passed to register_mforward.
1708 */
1709 int
1710 pim6_input(struct mbuf **mp, int *offp, int proto)
1711 {
1712 struct pim *pim; /* pointer to a pim struct */
1713 struct ip6_hdr *ip6;
1714 int pimlen;
1715 struct mbuf *m = *mp;
1716 int minlen;
1717 int off = *offp;
1718
1719 PIM6_STATINC(PIM6_STAT_RCV_TOTAL);
1720
1721 ip6 = mtod(m, struct ip6_hdr *);
1722 pimlen = m->m_pkthdr.len - *offp;
1723
1724 /*
1725 * Validate lengths
1726 */
1727 if (pimlen < PIM_MINLEN) {
1728 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT);
1729 #ifdef MRT6DEBUG
1730 if (mrt6debug & DEBUG_PIM)
1731 log(LOG_DEBUG,"pim6_input: PIM packet too short\n");
1732 #endif
1733 m_freem(m);
1734 return (IPPROTO_DONE);
1735 }
1736
1737 /*
1738 * if the packet is at least as big as a REGISTER, go ahead
1739 * and grab the PIM REGISTER header size, to avoid another
1740 * possible m_pullup() later.
1741 *
1742 * PIM_MINLEN == pimhdr + u_int32 == 8
1743 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40
1744 */
1745 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN;
1746
1747 /*
1748 * Make sure that the IP6 and PIM headers in contiguous memory, and
1749 * possibly the PIM REGISTER header
1750 */
1751 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen);
1752 if (pim == NULL) {
1753 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT);
1754 return IPPROTO_DONE;
1755 }
1756
1757 /* PIM version check */
1758 if (pim->pim_ver != PIM_VERSION) {
1759 PIM6_STATINC(PIM6_STAT_RCV_BADVERSION);
1760 #ifdef MRT6DEBUG
1761 log(LOG_ERR,
1762 "pim6_input: incorrect version %d, expecting %d\n",
1763 pim->pim_ver, PIM_VERSION);
1764 #endif
1765 m_freem(m);
1766 return (IPPROTO_DONE);
1767 }
1768
1769 #define PIM6_CHECKSUM
1770 #ifdef PIM6_CHECKSUM
1771 {
1772 int cksumlen;
1773
1774 /*
1775 * Validate checksum.
1776 * If PIM REGISTER, exclude the data packet
1777 */
1778 if (pim->pim_type == PIM_REGISTER)
1779 cksumlen = PIM_MINLEN;
1780 else
1781 cksumlen = pimlen;
1782
1783 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) {
1784 PIM6_STATINC(PIM6_STAT_RCV_BADSUM);
1785 #ifdef MRT6DEBUG
1786 if (mrt6debug & DEBUG_PIM)
1787 log(LOG_DEBUG,
1788 "pim6_input: invalid checksum\n");
1789 #endif
1790 m_freem(m);
1791 return (IPPROTO_DONE);
1792 }
1793 }
1794 #endif /* PIM_CHECKSUM */
1795
1796 if (pim->pim_type == PIM_REGISTER) {
1797 /*
1798 * since this is a REGISTER, we'll make a copy of the register
1799 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the
1800 * routing daemon.
1801 */
1802 static const struct sockaddr_in6 dst = {
1803 .sin6_len = sizeof(dst),
1804 .sin6_family = AF_INET6,
1805 };
1806
1807 struct mbuf *mcp;
1808 struct ip6_hdr *eip6;
1809 u_int32_t *reghdr;
1810
1811 PIM6_STATINC(PIM6_STAT_RCV_REGISTERS);
1812
1813 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) {
1814 #ifdef MRT6DEBUG
1815 if (mrt6debug & DEBUG_PIM)
1816 log(LOG_DEBUG,
1817 "pim6_input: register mif not set: %d\n",
1818 reg_mif_num);
1819 #endif
1820 m_freem(m);
1821 return (IPPROTO_DONE);
1822 }
1823
1824 reghdr = (u_int32_t *)(pim + 1);
1825
1826 if ((ntohl(*reghdr) & PIM_NULL_REGISTER))
1827 goto pim6_input_to_daemon;
1828
1829 /*
1830 * Validate length
1831 */
1832 if (pimlen < PIM6_REG_MINLEN) {
1833 PIM6_STATINC(PIM6_STAT_RCV_TOOSHORT);
1834 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS);
1835 #ifdef MRT6DEBUG
1836 log(LOG_ERR,
1837 "pim6_input: register packet size too "
1838 "small %d from %s\n",
1839 pimlen, ip6_sprintf(&ip6->ip6_src));
1840 #endif
1841 m_freem(m);
1842 return (IPPROTO_DONE);
1843 }
1844
1845 eip6 = (struct ip6_hdr *) (reghdr + 1);
1846 #ifdef MRT6DEBUG
1847 if (mrt6debug & DEBUG_PIM)
1848 log(LOG_DEBUG,
1849 "pim6_input[register], eip6: %s -> %s, "
1850 "eip6 plen %d\n",
1851 ip6_sprintf(&eip6->ip6_src),
1852 ip6_sprintf(&eip6->ip6_dst),
1853 ntohs(eip6->ip6_plen));
1854 #endif
1855
1856 /* verify the version number of the inner packet */
1857 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1858 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS);
1859 #ifdef MRT6DEBUG
1860 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) "
1861 "of the inner packet\n",
1862 (eip6->ip6_vfc & IPV6_VERSION));
1863 #endif
1864 m_freem(m);
1865 return (IPPROTO_NONE);
1866 }
1867
1868 /* verify the inner packet is destined to a mcast group */
1869 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) {
1870 PIM6_STATINC(PIM6_STAT_RCV_BADREGISTERS);
1871 #ifdef MRT6DEBUG
1872 if (mrt6debug & DEBUG_PIM)
1873 log(LOG_DEBUG,
1874 "pim6_input: inner packet of register "
1875 "is not multicast %s\n",
1876 ip6_sprintf(&eip6->ip6_dst));
1877 #endif
1878 m_freem(m);
1879 return (IPPROTO_DONE);
1880 }
1881
1882 /*
1883 * make a copy of the whole header to pass to the daemon later.
1884 */
1885 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN);
1886 if (mcp == NULL) {
1887 #ifdef MRT6DEBUG
1888 log(LOG_ERR,
1889 "pim6_input: pim register: "
1890 "could not copy register head\n");
1891 #endif
1892 m_freem(m);
1893 return (IPPROTO_DONE);
1894 }
1895
1896 /*
1897 * forward the inner ip6 packet; point m_data at the inner ip6.
1898 */
1899 m_adj(m, off + PIM_MINLEN);
1900 #ifdef MRT6DEBUG
1901 if (mrt6debug & DEBUG_PIM) {
1902 log(LOG_DEBUG,
1903 "pim6_input: forwarding decapsulated register: "
1904 "src %s, dst %s, mif %d\n",
1905 ip6_sprintf(&eip6->ip6_src),
1906 ip6_sprintf(&eip6->ip6_dst),
1907 reg_mif_num);
1908 }
1909 #endif
1910
1911 looutput(mif6table[reg_mif_num].m6_ifp, m,
1912 (struct sockaddr *)__UNCONST(&dst),
1913 (struct rtentry *) NULL);
1914
1915 /* prepare the register head to send to the mrouting daemon */
1916 m = mcp;
1917 }
1918
1919 /*
1920 * Pass the PIM message up to the daemon; if it is a register message
1921 * pass the 'head' only up to the daemon. This includes the
1922 * encapsulator ip6 header, pim header, register header and the
1923 * encapsulated ip6 header.
1924 */
1925 pim6_input_to_daemon:
1926 rip6_input(&m, offp, proto);
1927 return (IPPROTO_DONE);
1928 }
1929
1930 static int
1931 sysctl_net_inet6_pim6_stats(SYSCTLFN_ARGS)
1932 {
1933
1934 return (NETSTAT_SYSCTL(pim6stat_percpu, PIM6_NSTATS));
1935 }
1936
1937 SYSCTL_SETUP(sysctl_net_inet6_pim6_setup, "sysctl net.inet6.pim6 subtree setup")
1938 {
1939 sysctl_createv(clog, 0, NULL, NULL,
1940 CTLFLAG_PERMANENT,
1941 CTLTYPE_NODE, "net", NULL,
1942 NULL, 0, NULL, 0,
1943 CTL_NET, CTL_EOL);
1944 sysctl_createv(clog, 0, NULL, NULL,
1945 CTLFLAG_PERMANENT,
1946 CTLTYPE_NODE, "inet6", NULL,
1947 NULL, 0, NULL, 0,
1948 CTL_NET, PF_INET6, CTL_EOL);
1949 sysctl_createv(clog, 0, NULL, NULL,
1950 CTLFLAG_PERMANENT,
1951 CTLTYPE_NODE, "pim6",
1952 SYSCTL_DESCR("PIMv6 settings"),
1953 NULL, 0, NULL, 0,
1954 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL);
1955
1956 sysctl_createv(clog, 0, NULL, NULL,
1957 CTLFLAG_PERMANENT,
1958 CTLTYPE_STRUCT, "stats",
1959 SYSCTL_DESCR("PIMv6 statistics"),
1960 sysctl_net_inet6_pim6_stats, 0, NULL, 0,
1961 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS,
1962 CTL_EOL);
1963 }
Cache object: 63ffb56b9426dcf0279a55d78a7b6ee0
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