1/* $NetBSD: ip6_mroute.c,v 1.112 2016/07/15 07:40:09 ozaki-r 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 1.112 2016/07/15 07:40:09 ozaki-r Exp $");
121
122#ifdef _KERNEL_OPT
123#include "opt_inet.h"
124#include "opt_mrouting.h"
125#endif
126
127#include <sys/param.h>
128#include <sys/systm.h>
129#include <sys/callout.h>
130#include <sys/mbuf.h>
131#include <sys/socket.h>
132#include <sys/socketvar.h>
133#include <sys/sockio.h>
134#include <sys/protosw.h>
135#include <sys/errno.h>
136#include <sys/time.h>
137#include <sys/kernel.h>
138#include <sys/ioctl.h>
139#include <sys/sysctl.h>
140#include <sys/syslog.h>
141
142#include <net/if.h>
143#include <net/route.h>
144#include <net/raw_cb.h>
145#include <net/net_stats.h>
146
147#include <netinet/in.h>
148#include <netinet/in_var.h>
149#include <netinet/icmp6.h>
150
151#include <netinet/ip6.h>
152#include <netinet6/ip6_var.h>
153#include <netinet6/ip6_private.h>
154#include <netinet6/ip6_mroute.h>
155#include <netinet6/scope6_var.h>
156#include <netinet6/pim6.h>
157#include <netinet6/pim6_var.h>
158#include <netinet6/nd6.h>
159
160#include <net/net_osdep.h>
161
162static int ip6_mdq(struct mbuf *, struct ifnet *, struct mf6c *);
163static void phyint_send(struct ip6_hdr *, struct mif6 *, struct mbuf *);
164
165static int set_pim6(int *);
166static int socket_send(struct socket *, struct mbuf *,
167 struct sockaddr_in6 *);
168static int register_send(struct ip6_hdr *, struct mif6 *, struct mbuf *);
169
170/*
171 * Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static,
172 * except for netstat or debugging purposes.
173 */
174struct socket *ip6_mrouter = NULL;
175int ip6_mrouter_ver = 0;
176int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */
177struct mrt6stat mrt6stat;
178
179#define NO_RTE_FOUND 0x1
180#define RTE_FOUND 0x2
181
182struct mf6c *mf6ctable[MF6CTBLSIZ];
183u_char n6expire[MF6CTBLSIZ];
184struct mif6 mif6table[MAXMIFS];
185#ifdef MRT6DEBUG
186u_int mrt6debug = 0; /* debug level */
187#define DEBUG_MFC 0x02
188#define DEBUG_FORWARD 0x04
189#define DEBUG_EXPIRE 0x08
190#define DEBUG_XMIT 0x10
191#define DEBUG_REG 0x20
192#define DEBUG_PIM 0x40
193#define __mrt6debugused /* empty */
194#else
195#define __mrt6debugused __unused
196#endif
197
198static void expire_upcalls(void *);
199#define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */
200#define UPCALL_EXPIRE 6 /* number of timeouts */
201
202#ifdef INET
203#ifdef MROUTING
204extern struct socket *ip_mrouter;
205#endif
206#endif
207
208/*
209 * 'Interfaces' associated with decapsulator (so we can tell
210 * packets that went through it from ones that get reflected
211 * by a broken gateway). These interfaces are never linked into
212 * the system ifnet list & no routes point to them. I.e., packets
213 * can't be sent this way. They only exist as a placeholder for
214 * multicast source verification.
215 */
216struct ifnet multicast_register_if6;
217
218#define ENCAP_HOPS 64
219
220/*
221 * Private variables.
222 */
223static mifi_t nummifs = 0;
224static mifi_t reg_mif_num = (mifi_t)-1;
225
226static percpu_t *pim6stat_percpu;
227
228#define PIM6_STATINC(x) _NET_STATINC(pim6stat_percpu, x)
229
230static int pim6;
231
232/*
233 * Hash function for a source, group entry
234 */
235#define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \
236 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \
237 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \
238 (g).s6_addr32[2] ^ (g).s6_addr32[3])
239
240/*
241 * Find a route for a given origin IPv6 address and Multicast group address.
242 * Quality of service parameter to be added in the future!!!
243 */
244
245#define MF6CFIND(o, g, rt) do { \
246 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \
247 rt = NULL; \
248 mrt6stat.mrt6s_mfc_lookups++; \
249 while (_rt) { \
250 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \
251 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \
252 (_rt->mf6c_stall == NULL)) { \
253 rt = _rt; \
254 break; \
255 } \
256 _rt = _rt->mf6c_next; \
257 } \
258 if (rt == NULL) { \
259 mrt6stat.mrt6s_mfc_misses++; \
260 } \
261} while (/*CONSTCOND*/ 0)
262
263/*
264 * Macros to compute elapsed time efficiently
265 * Borrowed from Van Jacobson's scheduling code
266 */
267#define TV_DELTA(a, b, delta) do { \
268 int xxs; \
269 \
270 delta = (a).tv_usec - (b).tv_usec; \
271 if ((xxs = (a).tv_sec - (b).tv_sec)) { \
272 switch (xxs) { \
273 case 2: \
274 delta += 1000000; \
275 /* FALLTHROUGH */ \
276 case 1: \
277 delta += 1000000; \
278 break; \
279 default: \
280 delta += (1000000 * xxs); \
281 } \
282 } \
283} while (/*CONSTCOND*/ 0)
284
285#define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \
286 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec)
287
288#ifdef UPCALL_TIMING
289#define UPCALL_MAX 50
290u_long upcall_data[UPCALL_MAX + 1];
291static void collate();
292#endif /* UPCALL_TIMING */
293
294static int get_sg_cnt(struct sioc_sg_req6 *);
295static int get_mif6_cnt(struct sioc_mif_req6 *);
296static int ip6_mrouter_init(struct socket *, int, int);
297static int add_m6if(struct mif6ctl *);
298static int del_m6if(mifi_t *);
299static int add_m6fc(struct mf6cctl *);
300static int del_m6fc(struct mf6cctl *);
301static void sysctl_net_inet6_pim6_setup(struct sysctllog **);
302
303static callout_t expire_upcalls_ch;
304
305void
306pim6_init(void)
307{
308
309 sysctl_net_inet6_pim6_setup(NULL);
310 pim6stat_percpu = percpu_alloc(sizeof(uint64_t) * PIM6_NSTATS);
311}
312
313/*
314 * Handle MRT setsockopt commands to modify the multicast routing tables.
315 */
316int
317ip6_mrouter_set(struct socket *so, struct sockopt *sopt)
318{
319 int error, optval;
320 struct mif6ctl mifc;
321 struct mf6cctl mfcc;
322 mifi_t mifi;
323
324 if (sopt->sopt_name != MRT6_INIT && so != ip6_mrouter)
325 return (EACCES);
326
327 error = 0;
328
329 switch (sopt->sopt_name) {
330#ifdef MRT6_OINIT
331 case MRT6_OINIT:
332#endif
333 case MRT6_INIT:
334 error = sockopt_getint(sopt, &optval);
335 if (error)
336 break;
337 return (ip6_mrouter_init(so, optval, sopt->sopt_name));
338 case MRT6_DONE:
339 return (ip6_mrouter_done());
340 case MRT6_ADD_MIF:
341 error = sockopt_get(sopt, &mifc, sizeof(mifc));
342 if (error)
343 break;
344 return (add_m6if(&mifc));
345 case MRT6_DEL_MIF:
346 error = sockopt_get(sopt, &mifi, sizeof(mifi));
347 if (error)
348 break;
349 return (del_m6if(&mifi));
350 case MRT6_ADD_MFC:
351 error = sockopt_get(sopt, &mfcc, sizeof(mfcc));
352 if (error)
353 break;
354 return (add_m6fc(&mfcc));
355 case MRT6_DEL_MFC:
356 error = sockopt_get(sopt, &mfcc, sizeof(mfcc));
357 if (error)
358 break;
359 return (del_m6fc(&mfcc));
360 case MRT6_PIM:
361 error = sockopt_getint(sopt, &optval);
362 if (error)
363 break;
364 return (set_pim6(&optval));
365 default:
366 error = EOPNOTSUPP;
367 }
368
369 return (error);
370}
371
372/*
373 * Handle MRT getsockopt commands
374 */
375int
376ip6_mrouter_get(struct socket *so, struct sockopt *sopt)
377{
378 int error;
379
380 if (so != ip6_mrouter) return EACCES;
381
382 error = 0;
383
384 switch (sopt->sopt_name) {
385 case MRT6_PIM:
386 error = sockopt_set(sopt, &pim6, sizeof(pim6));
387 break;
388 default:
389 error = EOPNOTSUPP;
390 break;
391 }
392
393 return (error);
394}
395
396/*
397 * Handle ioctl commands to obtain information from the cache
398 */
399int
400mrt6_ioctl(u_long cmd, void *data)
401{
402
403 switch (cmd) {
404 case SIOCGETSGCNT_IN6:
405 return (get_sg_cnt((struct sioc_sg_req6 *)data));
406 case SIOCGETMIFCNT_IN6:
407 return (get_mif6_cnt((struct sioc_mif_req6 *)data));
408 default:
409 return (EINVAL);
410 }
411}
412
413/*
414 * returns the packet, byte, rpf-failure count for the source group provided
415 */
416static int
417get_sg_cnt(struct sioc_sg_req6 *req)
418{
419 struct mf6c *rt;
420 int s;
421
422 s = splsoftnet();
423 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt);
424 splx(s);
425 if (rt != NULL) {
426 req->pktcnt = rt->mf6c_pkt_cnt;
427 req->bytecnt = rt->mf6c_byte_cnt;
428 req->wrong_if = rt->mf6c_wrong_if;
429 } else
430 return (ESRCH);
431#if 0
432 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff;
433#endif
434
435 return 0;
436}
437
438/*
439 * returns the input and output packet and byte counts on the mif provided
440 */
441static int
442get_mif6_cnt(struct sioc_mif_req6 *req)
443{
444 mifi_t mifi = req->mifi;
445
446 if (mifi >= nummifs)
447 return EINVAL;
448
449 req->icount = mif6table[mifi].m6_pkt_in;
450 req->ocount = mif6table[mifi].m6_pkt_out;
451 req->ibytes = mif6table[mifi].m6_bytes_in;
452 req->obytes = mif6table[mifi].m6_bytes_out;
453
454 return 0;
455}
456
457static int
458set_pim6(int *i)
459{
460 if ((*i != 1) && (*i != 0))
461 return EINVAL;
462
463 pim6 = *i;
464
465 return 0;
466}
467
468/*
469 * Enable multicast routing
470 */
471static int
472ip6_mrouter_init(struct socket *so, int v, int cmd)
473{
474#ifdef MRT6DEBUG
475 if (mrt6debug)
476 log(LOG_DEBUG,
477 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n",
478 so->so_type, so->so_proto->pr_protocol);
479#endif
480
481 if (so->so_type != SOCK_RAW ||
482 so->so_proto->pr_protocol != IPPROTO_ICMPV6)
483 return (EOPNOTSUPP);
484
485 if (v != 1)
486 return (ENOPROTOOPT);
487
488 if (ip6_mrouter != NULL)
489 return (EADDRINUSE);
490
491 ip6_mrouter = so;
492 ip6_mrouter_ver = cmd;
493
494 memset((void *)mf6ctable, 0, sizeof(mf6ctable));
495 memset((void *)n6expire, 0, sizeof(n6expire));
496
497 pim6 = 0;/* used for stubbing out/in pim stuff */
498
499 callout_init(&expire_upcalls_ch, CALLOUT_MPSAFE);
500 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT,
501 expire_upcalls, NULL);
502
503#ifdef MRT6DEBUG
504 if (mrt6debug)
505 log(LOG_DEBUG, "ip6_mrouter_init\n");
506#endif
507
508 return 0;
509}
510
511/*
512 * Disable multicast routing
513 */
514int
515ip6_mrouter_done(void)
516{
517 mifi_t mifi;
518 int i;
519 struct ifnet *ifp;
520 struct sockaddr_in6 sin6;
521 struct mf6c *rt;
522 struct rtdetq *rte;
523 int s;
524
525 s = splsoftnet();
526
527 /*
528 * For each phyint in use, disable promiscuous reception of all IPv6
529 * multicasts.
530 */
531#ifdef INET
532#ifdef MROUTING
533 /*
534 * If there is still IPv4 multicast routing daemon,
535 * we remain interfaces to receive all muliticasted packets.
536 * XXX: there may be an interface in which the IPv4 multicast
537 * daemon is not interested...
538 */
539 if (!ip_mrouter)
540#endif
541#endif
542 {
543 for (mifi = 0; mifi < nummifs; mifi++) {
544 if (mif6table[mifi].m6_ifp &&
545 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) {
546 sin6.sin6_family = AF_INET6;
547 sin6.sin6_addr = in6addr_any;
548 ifp = mif6table[mifi].m6_ifp;
549 if_mcast_op(ifp, SIOCDELMULTI,
550 sin6tocsa(&sin6));
551 }
552 }
553 }
554#ifdef notyet
555 memset((void *)qtable, 0, sizeof(qtable));
556 memset((void *)tbftable, 0, sizeof(tbftable));
557#endif
558 memset((void *)mif6table, 0, sizeof(mif6table));
559 nummifs = 0;
560
561 pim6 = 0; /* used to stub out/in pim specific code */
562
563 callout_stop(&expire_upcalls_ch);
564
565 /*
566 * Free all multicast forwarding cache entries.
567 */
568 for (i = 0; i < MF6CTBLSIZ; i++) {
569 rt = mf6ctable[i];
570 while (rt) {
571 struct mf6c *frt;
572
573 for (rte = rt->mf6c_stall; rte != NULL; ) {
574 struct rtdetq *n = rte->next;
575
576 m_freem(rte->m);
577 free(rte, M_MRTABLE);
578 rte = n;
579 }
580 frt = rt;
581 rt = rt->mf6c_next;
582 free(frt, M_MRTABLE);
583 }
584 }
585
586 memset((void *)mf6ctable, 0, sizeof(mf6ctable));
587
588 /*
589 * Reset register interface
590 */
591 if (reg_mif_num != (mifi_t)-1) {
592 if_detach(&multicast_register_if6);
593 reg_mif_num = (mifi_t)-1;
594 }
595
596 ip6_mrouter = NULL;
597 ip6_mrouter_ver = 0;
598
599 splx(s);
600
601#ifdef MRT6DEBUG
602 if (mrt6debug)
603 log(LOG_DEBUG, "ip6_mrouter_done\n");
604#endif
605
606 return 0;
607}
608
609void
610ip6_mrouter_detach(struct ifnet *ifp)
611{
612 struct rtdetq *rte;
613 struct mf6c *mfc;
614 mifi_t mifi;
615 int i;
616
617 if (ip6_mrouter == NULL)
618 return;
619
620 /*
621 * Delete a mif which points to ifp.
622 */
623 for (mifi = 0; mifi < nummifs; mifi++)
624 if (mif6table[mifi].m6_ifp == ifp)
625 del_m6if(&mifi);
626
627 /*
628 * Clear rte->ifp of cache entries received on ifp.
629 */
630 for (i = 0; i < MF6CTBLSIZ; i++) {
631 if (n6expire[i] == 0)
632 continue;
633
634 for (mfc = mf6ctable[i]; mfc != NULL; mfc = mfc->mf6c_next) {
635 for (rte = mfc->mf6c_stall; rte != NULL; rte = rte->next) {
636 if (rte->ifp == ifp)
637 rte->ifp = NULL;
638 }
639 }
640 }
641}
642
643
644/*
645 * Add a mif to the mif table
646 */
647static int
648add_m6if(struct mif6ctl *mifcp)
649{
650 struct mif6 *mifp;
651 struct ifnet *ifp;
652 struct sockaddr_in6 sin6;
653 int error, s;
654#ifdef notyet
655 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi;
656#endif
657
658 if (mifcp->mif6c_mifi >= MAXMIFS)
659 return EINVAL;
660 mifp = mif6table + mifcp->mif6c_mifi;
661 if (mifp->m6_ifp)
662 return EADDRINUSE; /* XXX: is it appropriate? */
663 if (!mifcp->mif6c_pifi || (ifp = if_byindex(mifcp->mif6c_pifi)) == NULL)
664 return ENXIO;
665
666 if (mifcp->mif6c_flags & MIFF_REGISTER) {
667 ifp = &multicast_register_if6;
668
669 if (reg_mif_num == (mifi_t)-1) {
670 strlcpy(ifp->if_xname, "register_mif",
671 sizeof(ifp->if_xname));
672 ifp->if_flags |= IFF_LOOPBACK;
673 ifp->if_index = mifcp->mif6c_mifi;
674 reg_mif_num = mifcp->mif6c_mifi;
675 if_attach(ifp);
676 }
677
678 } /* if REGISTER */
679 else {
680 /* Make sure the interface supports multicast */
681 if ((ifp->if_flags & IFF_MULTICAST) == 0)
682 return EOPNOTSUPP;
683
684 s = splsoftnet();
685 /*
686 * Enable promiscuous reception of all IPv6 multicasts
687 * from the interface.
688 */
689 sin6.sin6_family = AF_INET6;
690 sin6.sin6_addr = in6addr_any;
691 error = if_mcast_op(ifp, SIOCADDMULTI, sin6tosa(&sin6));
692 splx(s);
693 if (error)
694 return error;
695 }
696
697 s = splsoftnet();
698 mifp->m6_flags = mifcp->mif6c_flags;
699 mifp->m6_ifp = ifp;
700#ifdef notyet
701 /* scaling up here allows division by 1024 in critical code */
702 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000;
703#endif
704 /* initialize per mif pkt counters */
705 mifp->m6_pkt_in = 0;
706 mifp->m6_pkt_out = 0;
707 mifp->m6_bytes_in = 0;
708 mifp->m6_bytes_out = 0;
709 splx(s);
710
711 /* Adjust nummifs up if the mifi is higher than nummifs */
712 if (nummifs <= mifcp->mif6c_mifi)
713 nummifs = mifcp->mif6c_mifi + 1;
714
715#ifdef MRT6DEBUG
716 if (mrt6debug)
717 log(LOG_DEBUG,
718 "add_mif #%d, phyint %s\n",
719 mifcp->mif6c_mifi, ifp->if_xname);
720#endif
721
722 return 0;
723}
724
725/*
726 * Delete a mif from the mif table
727 */
728static int
729del_m6if(mifi_t *mifip)
730{
731 struct mif6 *mifp = mif6table + *mifip;
732 mifi_t mifi;
733 struct ifnet *ifp;
734 struct sockaddr_in6 sin6;
735 int s;
736
737 if (*mifip >= nummifs)
738 return EINVAL;
739 if (mifp->m6_ifp == NULL)
740 return EINVAL;
741
742 s = splsoftnet();
743
744 if (!(mifp->m6_flags & MIFF_REGISTER)) {
745 /*
746 * XXX: what if there is yet IPv4 multicast daemon
747 * using the interface?
748 */
749 ifp = mifp->m6_ifp;
750
751 sin6.sin6_family = AF_INET6;
752 sin6.sin6_addr = in6addr_any;
753 if_mcast_op(ifp, SIOCDELMULTI, sin6tosa(&sin6));
754 } else {
755 if (reg_mif_num != (mifi_t)-1) {
756 if_detach(&multicast_register_if6);
757 reg_mif_num = (mifi_t)-1;
758 }
759 }
760
761#ifdef notyet
762 memset((void *)qtable[*mifip], 0, sizeof(qtable[*mifip]));
763 memset((void *)mifp->m6_tbf, 0, sizeof(*(mifp->m6_tbf)));
764#endif
765 memset((void *)mifp, 0, sizeof (*mifp));
766
767 /* Adjust nummifs down */
768 for (mifi = nummifs; mifi > 0; mifi--)
769 if (mif6table[mifi - 1].m6_ifp)
770 break;
771 nummifs = mifi;
772
773 splx(s);
774
775#ifdef MRT6DEBUG
776 if (mrt6debug)
777 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs);
778#endif
779
780 return 0;
781}
782
783/*
784 * Add an mfc entry
785 */
786static int
787add_m6fc(struct mf6cctl *mfccp)
788{
789 struct mf6c *rt;
790 u_long hash;
791 struct rtdetq *rte;
792 u_short nstl;
793 int s;
794
795 MF6CFIND(mfccp->mf6cc_origin.sin6_addr,
796 mfccp->mf6cc_mcastgrp.sin6_addr, rt);
797
798 /* If an entry already exists, just update the fields */
799 if (rt) {
800#ifdef MRT6DEBUG
801 if (mrt6debug & DEBUG_MFC)
802 log(LOG_DEBUG,"add_m6fc update o %s g %s p %x\n",
803 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
804 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
805 mfccp->mf6cc_parent);
806#endif
807
808 s = splsoftnet();
809 rt->mf6c_parent = mfccp->mf6cc_parent;
810 rt->mf6c_ifset = mfccp->mf6cc_ifset;
811 splx(s);
812 return 0;
813 }
814
815 /*
816 * Find the entry for which the upcall was made and update
817 */
818 s = splsoftnet();
819 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr,
820 mfccp->mf6cc_mcastgrp.sin6_addr);
821 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) {
822 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr,
823 &mfccp->mf6cc_origin.sin6_addr) &&
824 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr,
825 &mfccp->mf6cc_mcastgrp.sin6_addr) &&
826 (rt->mf6c_stall != NULL)) {
827
828 if (nstl++)
829 log(LOG_ERR,
830 "add_m6fc: %s o %s g %s p %x dbx %p\n",
831 "multiple kernel entries",
832 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
833 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
834 mfccp->mf6cc_parent, rt->mf6c_stall);
835
836#ifdef MRT6DEBUG
837 if (mrt6debug & DEBUG_MFC)
838 log(LOG_DEBUG,
839 "add_m6fc o %s g %s p %x dbg %p\n",
840 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
841 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
842 mfccp->mf6cc_parent, rt->mf6c_stall);
843#endif
844
845 rt->mf6c_origin = mfccp->mf6cc_origin;
846 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
847 rt->mf6c_parent = mfccp->mf6cc_parent;
848 rt->mf6c_ifset = mfccp->mf6cc_ifset;
849 /* initialize pkt counters per src-grp */
850 rt->mf6c_pkt_cnt = 0;
851 rt->mf6c_byte_cnt = 0;
852 rt->mf6c_wrong_if = 0;
853
854 rt->mf6c_expire = 0; /* Don't clean this guy up */
855 n6expire[hash]--;
856
857 /* free packets Qed at the end of this entry */
858 for (rte = rt->mf6c_stall; rte != NULL; ) {
859 struct rtdetq *n = rte->next;
860 if (rte->ifp) {
861 ip6_mdq(rte->m, rte->ifp, rt);
862 }
863 m_freem(rte->m);
864#ifdef UPCALL_TIMING
865 collate(&(rte->t));
866#endif /* UPCALL_TIMING */
867 free(rte, M_MRTABLE);
868 rte = n;
869 }
870 rt->mf6c_stall = NULL;
871 }
872 }
873
874 /*
875 * It is possible that an entry is being inserted without an upcall
876 */
877 if (nstl == 0) {
878#ifdef MRT6DEBUG
879 if (mrt6debug & DEBUG_MFC)
880 log(LOG_DEBUG,
881 "add_mfc no upcall h %ld o %s g %s p %x\n",
882 hash,
883 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
884 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
885 mfccp->mf6cc_parent);
886#endif
887
888 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) {
889
890 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr,
891 &mfccp->mf6cc_origin.sin6_addr)&&
892 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr,
893 &mfccp->mf6cc_mcastgrp.sin6_addr)) {
894
895 rt->mf6c_origin = mfccp->mf6cc_origin;
896 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
897 rt->mf6c_parent = mfccp->mf6cc_parent;
898 rt->mf6c_ifset = mfccp->mf6cc_ifset;
899 /* initialize pkt counters per src-grp */
900 rt->mf6c_pkt_cnt = 0;
901 rt->mf6c_byte_cnt = 0;
902 rt->mf6c_wrong_if = 0;
903
904 if (rt->mf6c_expire)
905 n6expire[hash]--;
906 rt->mf6c_expire = 0;
907 }
908 }
909 if (rt == NULL) {
910 /* no upcall, so make a new entry */
911 rt = (struct mf6c *)malloc(sizeof(*rt), M_MRTABLE,
912 M_NOWAIT);
913 if (rt == NULL) {
914 splx(s);
915 return ENOBUFS;
916 }
917
918 /* insert new entry at head of hash chain */
919 rt->mf6c_origin = mfccp->mf6cc_origin;
920 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
921 rt->mf6c_parent = mfccp->mf6cc_parent;
922 rt->mf6c_ifset = mfccp->mf6cc_ifset;
923 /* initialize pkt counters per src-grp */
924 rt->mf6c_pkt_cnt = 0;
925 rt->mf6c_byte_cnt = 0;
926 rt->mf6c_wrong_if = 0;
927 rt->mf6c_expire = 0;
928 rt->mf6c_stall = NULL;
929
930 /* link into table */
931 rt->mf6c_next = mf6ctable[hash];
932 mf6ctable[hash] = rt;
933 }
934 }
935 splx(s);
936 return 0;
937}
938
939#ifdef UPCALL_TIMING
940/*
941 * collect delay statistics on the upcalls
942 */
943static void
944collate(struct timeval *t)
945{
946 u_long d;
947 struct timeval tp;
948 u_long delta;
949
950 GET_TIME(tp);
951
952 if (TV_LT(*t, tp))
953 {
954 TV_DELTA(tp, *t, delta);
955
956 d = delta >> 10;
957 if (d > UPCALL_MAX)
958 d = UPCALL_MAX;
959
960 ++upcall_data[d];
961 }
962}
963#endif /* UPCALL_TIMING */
964
965/*
966 * Delete an mfc entry
967 */
968static int
969del_m6fc(struct mf6cctl *mfccp)
970{
971 struct sockaddr_in6 origin;
972 struct sockaddr_in6 mcastgrp;
973 struct mf6c *rt;
974 struct mf6c **nptr;
975 u_long hash;
976 int s;
977
978 origin = mfccp->mf6cc_origin;
979 mcastgrp = mfccp->mf6cc_mcastgrp;
980 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr);
981
982#ifdef MRT6DEBUG
983 if (mrt6debug & DEBUG_MFC)
984 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n",
985 ip6_sprintf(&origin.sin6_addr),
986 ip6_sprintf(&mcastgrp.sin6_addr));
987#endif
988
989 s = splsoftnet();
990
991 nptr = &mf6ctable[hash];
992 while ((rt = *nptr) != NULL) {
993 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr,
994 &rt->mf6c_origin.sin6_addr) &&
995 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr,
996 &rt->mf6c_mcastgrp.sin6_addr) &&
997 rt->mf6c_stall == NULL)
998 break;
999
1000 nptr = &rt->mf6c_next;
1001 }
1002 if (rt == NULL) {
1003 splx(s);
1004 return EADDRNOTAVAIL;
1005 }
1006
1007 *nptr = rt->mf6c_next;
1008 free(rt, M_MRTABLE);
1009
1010 splx(s);
1011
1012 return 0;
1013}
1014
1015static int
1016socket_send(struct socket *s, struct mbuf *mm, struct sockaddr_in6 *src)
1017{
1018 if (s) {
1019 if (sbappendaddr(&s->so_rcv, sin6tosa(src), mm, NULL) != 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
1039int
1040ip6_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_uptime) {
1075 ip6_log_time = time_uptime;
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_index ?
1083 if_name(m_get_rcvif_NOMPSAFE(m)) : "?");
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 memset(rt, 0, 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 */
1294static void
1295expire_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 */
1354static int
1355ip6_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 memset(&sin6, 0, 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_index == 0) {
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
1527static void
1528phyint_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 __mrt6debugused = 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_index == 0) {
1564 struct ip6_moptions im6o;
1565
1566 im6o.im6o_multicast_if_index = if_get_index(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 %td 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 %td 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
1641static int
1642register_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 */
1709int
1710pim6_input(struct mbuf **mp, int *offp, int proto)
1711{
1712 struct pim *pim; /* pointer to a pim struct */
1713 struct ip6_hdr *ip6 __mrt6debugused;
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, sin6tocsa(&dst),
1912 NULL);
1913
1914 /* prepare the register head to send to the mrouting daemon */
1915 m = mcp;
1916 }
1917
1918 /*
1919 * Pass the PIM message up to the daemon; if it is a register message
1920 * pass the 'head' only up to the daemon. This includes the
1921 * encapsulator ip6 header, pim header, register header and the
1922 * encapsulated ip6 header.
1923 */
1924 pim6_input_to_daemon:
1925 rip6_input(&m, offp, proto);
1926 return (IPPROTO_DONE);
1927}
1928
1929static int
1930sysctl_net_inet6_pim6_stats(SYSCTLFN_ARGS)
1931{
1932
1933 return (NETSTAT_SYSCTL(pim6stat_percpu, PIM6_NSTATS));
1934}
1935
1936static void
1937sysctl_net_inet6_pim6_setup(struct sysctllog **clog)
1938{
1939
1940 sysctl_createv(clog, 0, NULL, NULL,
1941 CTLFLAG_PERMANENT,
1942 CTLTYPE_NODE, "inet6", NULL,
1943 NULL, 0, NULL, 0,
1944 CTL_NET, PF_INET6, CTL_EOL);
1945 sysctl_createv(clog, 0, NULL, NULL,
1946 CTLFLAG_PERMANENT,
1947 CTLTYPE_NODE, "pim6",
1948 SYSCTL_DESCR("PIMv6 settings"),
1949 NULL, 0, NULL, 0,
1950 CTL_NET, PF_INET6, IPPROTO_PIM, CTL_EOL);
1951
1952 sysctl_createv(clog, 0, NULL, NULL,
1953 CTLFLAG_PERMANENT,
1954 CTLTYPE_STRUCT, "stats",
1955 SYSCTL_DESCR("PIMv6 statistics"),
1956 sysctl_net_inet6_pim6_stats, 0, NULL, 0,
1957 CTL_NET, PF_INET6, IPPROTO_PIM, PIM6CTL_STATS,
1958 CTL_EOL);
1959}
1960