inet6: emit RTM_NEWADDR messages on address flag changes.
[dragonfly.git] / sys / netinet6 / ip6_mroute.c
CommitLineData
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1/* $FreeBSD: src/sys/netinet6/ip6_mroute.c,v 1.2.2.9 2003/01/23 21:06:47 sam Exp $ */
2/* $KAME: ip6_mroute.c,v 1.58 2001/12/18 02:36:31 itojun 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
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35/*
36 * Copyright (c) 1989 Stephen Deering
37 * Copyright (c) 1992, 1993
38 * The Regents of the University of California. All rights reserved.
39 *
40 * This code is derived from software contributed to Berkeley by
41 * Stephen Deering of Stanford University.
42 *
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
45 * are met:
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
2c64e990 51 * 3. Neither the name of the University nor the names of its contributors
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52 * may be used to endorse or promote products derived from this software
53 * without specific prior written permission.
54 *
55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
65 * SUCH DAMAGE.
66 *
67 * @(#)ip_mroute.c 8.2 (Berkeley) 11/15/93
68 */
69
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70/*
71 * IP multicast forwarding procedures
72 *
73 * Written by David Waitzman, BBN Labs, August 1988.
74 * Modified by Steve Deering, Stanford, February 1989.
75 * Modified by Mark J. Steiglitz, Stanford, May, 1991
76 * Modified by Van Jacobson, LBL, January 1993
77 * Modified by Ajit Thyagarajan, PARC, August 1993
1af953ac 78 * Modified by Bill Fenner, PARC, April 1994
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79 *
80 * MROUTING Revision: 3.5.1.2 + PIM-SMv2 (pimd) Support
81 */
82
83#include "opt_inet.h"
84#include "opt_inet6.h"
85
86#include <sys/param.h>
87#include <sys/systm.h>
88#include <sys/callout.h>
89#include <sys/malloc.h>
90#include <sys/mbuf.h>
91#include <sys/socket.h>
92#include <sys/socketvar.h>
93#include <sys/sockio.h>
94#include <sys/protosw.h>
95#include <sys/errno.h>
96#include <sys/time.h>
97#include <sys/kernel.h>
98#include <sys/syslog.h>
abf782b3 99#include <sys/thread2.h>
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100
101#include <net/if.h>
102#include <net/route.h>
103#include <net/raw_cb.h>
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104#include <net/netisr2.h>
105#include <net/netmsg2.h>
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106
107#include <netinet/in.h>
108#include <netinet/in_var.h>
109
110#include <netinet/ip6.h>
111#include <netinet6/ip6_var.h>
112#include <netinet6/ip6_mroute.h>
304e70d2 113#include <netinet6/nd6.h>
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114#include <netinet6/pim6.h>
115#include <netinet6/pim6_var.h>
116
117#include <net/net_osdep.h>
118
119static MALLOC_DEFINE(M_MRTABLE, "mf6c", "multicast forwarding cache entry");
120
121#define M_HASCL(m) ((m)->m_flags & M_EXT)
122
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123static int ip6_mdq (struct mbuf *, struct ifnet *, struct mf6c *);
124static void phyint_send (struct ip6_hdr *, struct mif6 *, struct mbuf *);
984263bc 125
56d702cc 126static int set_pim6 (int *);
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127static int socket_send(struct socket *, struct mbuf *, struct sockaddr_in6 *);
128static int register_send(struct ip6_hdr *, struct mif6 *, struct mbuf *);
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129
130/*
131 * Globals. All but ip6_mrouter, ip6_mrtproto and mrt6stat could be static,
132 * except for netstat or debugging purposes.
133 */
134struct socket *ip6_mrouter = NULL;
135int ip6_mrouter_ver = 0;
136int ip6_mrtproto = IPPROTO_PIM; /* for netstat only */
137struct mrt6stat mrt6stat;
138
139#define NO_RTE_FOUND 0x1
140#define RTE_FOUND 0x2
141
142struct mf6c *mf6ctable[MF6CTBLSIZ];
143u_char n6expire[MF6CTBLSIZ];
144static struct mif6 mif6table[MAXMIFS];
145#ifdef MRT6DEBUG
146u_int mrt6debug = 0; /* debug level */
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147#define DEBUG_MFC 0x02
148#define DEBUG_FORWARD 0x04
149#define DEBUG_EXPIRE 0x08
150#define DEBUG_XMIT 0x10
151#define DEBUG_REG 0x20
152#define DEBUG_PIM 0x40
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153#endif
154
56d702cc 155static void expire_upcalls (void *);
736b6ebe 156static void expire_upcalls_dispatch(netmsg_t);
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157#define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */
158#define UPCALL_EXPIRE 6 /* number of timeouts */
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159
160#ifdef INET
161#ifdef MROUTING
162extern struct socket *ip_mrouter;
163#endif
164#endif
165
166/*
167 * 'Interfaces' associated with decapsulator (so we can tell
168 * packets that went through it from ones that get reflected
169 * by a broken gateway). These interfaces are never linked into
170 * the system ifnet list & no routes point to them. I.e., packets
171 * can't be sent this way. They only exist as a placeholder for
172 * multicast source verification.
173 */
174struct ifnet multicast_register_if;
175
176#define ENCAP_HOPS 64
177
178/*
179 * Private variables.
180 */
181static mifi_t nummifs = 0;
182static mifi_t reg_mif_num = (mifi_t)-1;
183
184static struct pim6stat pim6stat;
185static int pim6;
186
187/*
188 * Hash function for a source, group entry
189 */
190#define MF6CHASH(a, g) MF6CHASHMOD((a).s6_addr32[0] ^ (a).s6_addr32[1] ^ \
191 (a).s6_addr32[2] ^ (a).s6_addr32[3] ^ \
192 (g).s6_addr32[0] ^ (g).s6_addr32[1] ^ \
193 (g).s6_addr32[2] ^ (g).s6_addr32[3])
194
195/*
196 * Find a route for a given origin IPv6 address and Multicast group address.
197 * Quality of service parameter to be added in the future!!!
198 */
199
200#define MF6CFIND(o, g, rt) do { \
201 struct mf6c *_rt = mf6ctable[MF6CHASH(o,g)]; \
202 rt = NULL; \
203 mrt6stat.mrt6s_mfc_lookups++; \
204 while (_rt) { \
205 if (IN6_ARE_ADDR_EQUAL(&_rt->mf6c_origin.sin6_addr, &(o)) && \
206 IN6_ARE_ADDR_EQUAL(&_rt->mf6c_mcastgrp.sin6_addr, &(g)) && \
207 (_rt->mf6c_stall == NULL)) { \
208 rt = _rt; \
209 break; \
210 } \
211 _rt = _rt->mf6c_next; \
212 } \
213 if (rt == NULL) { \
214 mrt6stat.mrt6s_mfc_misses++; \
215 } \
216} while (0)
217
218/*
219 * Macros to compute elapsed time efficiently
220 * Borrowed from Van Jacobson's scheduling code
221 */
222#define TV_DELTA(a, b, delta) do { \
223 int xxs; \
224 \
225 delta = (a).tv_usec - (b).tv_usec; \
226 if ((xxs = (a).tv_sec - (b).tv_sec)) { \
227 switch (xxs) { \
228 case 2: \
229 delta += 1000000; \
1af953ac 230 /* FALLTHROUGH */ \
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231 case 1: \
232 delta += 1000000; \
233 break; \
234 default: \
235 delta += (1000000 * xxs); \
236 } \
237 } \
238} while (0)
239
240#define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \
241 (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec)
242
243#ifdef UPCALL_TIMING
244#define UPCALL_MAX 50
245u_long upcall_data[UPCALL_MAX + 1];
246static void collate();
247#endif /* UPCALL_TIMING */
248
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249static int get_sg_cnt (struct sioc_sg_req6 *);
250static int get_mif6_cnt (struct sioc_mif_req6 *);
251static int ip6_mrouter_init (struct socket *, struct mbuf *, int);
252static int add_m6if (struct mif6ctl *);
253static int del_m6if (mifi_t *);
254static int add_m6fc (struct mf6cctl *);
255static int del_m6fc (struct mf6cctl *);
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256
257static struct callout expire_upcalls_ch;
736b6ebe 258static struct netmsg_base expire_upcalls_nmsg;
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259
260/*
261 * Handle MRT setsockopt commands to modify the multicast routing tables.
262 */
263int
122ebd49 264ip6_mrouter_set(struct socket *so, struct sockopt *sopt)
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265{
266 int error = 0;
267 struct mbuf *m;
268
269 if (so != ip6_mrouter && sopt->sopt_name != MRT6_INIT)
270 return (EACCES);
271
272 if ((error = soopt_getm(sopt, &m)) != 0) /* XXX */
273 return (error);
6caa4804 274 soopt_to_mbuf(sopt, m); /* XXX */
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275
276 switch (sopt->sopt_name) {
277 case MRT6_INIT:
278#ifdef MRT6_OINIT
279 case MRT6_OINIT:
280#endif
281 error = ip6_mrouter_init(so, m, sopt->sopt_name);
282 break;
283 case MRT6_DONE:
284 error = ip6_mrouter_done();
285 break;
286 case MRT6_ADD_MIF:
287 error = add_m6if(mtod(m, struct mif6ctl *));
288 break;
289 case MRT6_DEL_MIF:
290 error = del_m6if(mtod(m, mifi_t *));
291 break;
292 case MRT6_ADD_MFC:
293 error = add_m6fc(mtod(m, struct mf6cctl *));
294 break;
295 case MRT6_DEL_MFC:
296 error = del_m6fc(mtod(m, struct mf6cctl *));
297 break;
298 case MRT6_PIM:
299 error = set_pim6(mtod(m, int *));
300 break;
301 default:
302 error = EOPNOTSUPP;
303 break;
304 }
305
0bdb1448 306 m_freem(m);
bde3511a 307 return (error);
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308}
309
310/*
311 * Handle MRT getsockopt commands
312 */
313int
122ebd49 314ip6_mrouter_get(struct socket *so, struct sockopt *sopt)
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315{
316 int error = 0;
317
318 if (so != ip6_mrouter) return EACCES;
319
320 switch (sopt->sopt_name) {
321 case MRT6_PIM:
6caa4804 322 soopt_from_kbuf(sopt, &pim6, sizeof(pim6));
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323 break;
324 }
325 return (error);
326}
327
328/*
329 * Handle ioctl commands to obtain information from the cache
330 */
331int
1647c7bd 332mrt6_ioctl(u_long cmd, caddr_t data)
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333{
334 int error = 0;
335
336 switch (cmd) {
337 case SIOCGETSGCNT_IN6:
bde3511a 338 return (get_sg_cnt((struct sioc_sg_req6 *)data));
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339 break; /* for safety */
340 case SIOCGETMIFCNT_IN6:
bde3511a 341 return (get_mif6_cnt((struct sioc_mif_req6 *)data));
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342 break; /* for safety */
343 default:
344 return (EINVAL);
345 break;
346 }
347 return error;
348}
349
350/*
351 * returns the packet, byte, rpf-failure count for the source group provided
352 */
353static int
122ebd49 354get_sg_cnt(struct sioc_sg_req6 *req)
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355{
356 struct mf6c *rt;
984263bc 357
abf782b3 358 crit_enter();
984263bc 359 MF6CFIND(req->src.sin6_addr, req->grp.sin6_addr, rt);
abf782b3 360 crit_exit();
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361 if (rt != NULL) {
362 req->pktcnt = rt->mf6c_pkt_cnt;
363 req->bytecnt = rt->mf6c_byte_cnt;
364 req->wrong_if = rt->mf6c_wrong_if;
365 } else
bde3511a 366 return (ESRCH);
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367#if 0
368 req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff;
369#endif
370
371 return 0;
372}
373
374/*
375 * returns the input and output packet and byte counts on the mif provided
376 */
377static int
122ebd49 378get_mif6_cnt(struct sioc_mif_req6 *req)
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379{
380 mifi_t mifi = req->mifi;
381
382 if (mifi >= nummifs)
383 return EINVAL;
384
385 req->icount = mif6table[mifi].m6_pkt_in;
386 req->ocount = mif6table[mifi].m6_pkt_out;
387 req->ibytes = mif6table[mifi].m6_bytes_in;
388 req->obytes = mif6table[mifi].m6_bytes_out;
389
390 return 0;
391}
392
393static int
122ebd49 394set_pim6(int *i)
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395{
396 if ((*i != 1) && (*i != 0))
397 return EINVAL;
398
399 pim6 = *i;
400
401 return 0;
402}
403
404/*
405 * Enable multicast routing
406 */
407static int
122ebd49 408ip6_mrouter_init(struct socket *so, struct mbuf *m, int cmd)
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409{
410 int *v;
411
5204e13c 412 ASSERT_NETISR0;
736b6ebe 413
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414#ifdef MRT6DEBUG
415 if (mrt6debug)
416 log(LOG_DEBUG,
417 "ip6_mrouter_init: so_type = %d, pr_protocol = %d\n",
418 so->so_type, so->so_proto->pr_protocol);
419#endif
420
421 if (so->so_type != SOCK_RAW ||
422 so->so_proto->pr_protocol != IPPROTO_ICMPV6)
423 return EOPNOTSUPP;
424
425 if (!m || (m->m_len != sizeof(int *)))
426 return ENOPROTOOPT;
427
428 v = mtod(m, int *);
429 if (*v != 1)
430 return ENOPROTOOPT;
431
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432 if (ip6_mrouter != NULL)
433 return EADDRINUSE;
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434
435 ip6_mrouter = so;
436 ip6_mrouter_ver = cmd;
437
438 bzero((caddr_t)mf6ctable, sizeof(mf6ctable));
439 bzero((caddr_t)n6expire, sizeof(n6expire));
440
441 pim6 = 0;/* used for stubbing out/in pim stuff */
442
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443 callout_init_mp(&expire_upcalls_ch);
444 netmsg_init(&expire_upcalls_nmsg, NULL, &netisr_adone_rport,
445 MSGF_PRIORITY | MSGF_DROPABLE, expire_upcalls_dispatch);
446
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447 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT,
448 expire_upcalls, NULL);
449
450#ifdef MRT6DEBUG
451 if (mrt6debug)
452 log(LOG_DEBUG, "ip6_mrouter_init\n");
453#endif
454
455 return 0;
456}
457
458/*
459 * Disable multicast routing
460 */
461int
122ebd49 462ip6_mrouter_done(void)
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463{
464 mifi_t mifi;
465 int i;
466 struct ifnet *ifp;
467 struct in6_ifreq ifr;
468 struct mf6c *rt;
469 struct rtdetq *rte;
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470 struct lwkt_msg *lmsg = &expire_upcalls_nmsg.lmsg;
471
5204e13c 472 ASSERT_NETISR0;
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473
474 if (ip6_mrouter == NULL)
475 return EINVAL;
984263bc 476
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477 /*
478 * For each phyint in use, disable promiscuous reception of all IPv6
479 * multicasts.
480 */
481#ifdef INET
482#ifdef MROUTING
483 /*
484 * If there is still IPv4 multicast routing daemon,
485 * we remain interfaces to receive all muliticasted packets.
486 * XXX: there may be an interface in which the IPv4 multicast
487 * daemon is not interested...
488 */
489 if (!ip_mrouter)
490#endif
491#endif
492 {
493 for (mifi = 0; mifi < nummifs; mifi++) {
494 if (mif6table[mifi].m6_ifp &&
495 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) {
496 ifr.ifr_addr.sin6_family = AF_INET6;
1af953ac 497 ifr.ifr_addr.sin6_addr = kin6addr_any;
984263bc 498 ifp = mif6table[mifi].m6_ifp;
a3dd34d2 499 ifnet_serialize_all(ifp);
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500 ifp->if_ioctl(ifp, SIOCDELMULTI,
501 (caddr_t)&ifr, NULL);
a3dd34d2 502 ifnet_deserialize_all(ifp);
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503 }
504 }
505 }
506#ifdef notyet
507 bzero((caddr_t)qtable, sizeof(qtable));
508 bzero((caddr_t)tbftable, sizeof(tbftable));
509#endif
510 bzero((caddr_t)mif6table, sizeof(mif6table));
511 nummifs = 0;
512
513 pim6 = 0; /* used to stub out/in pim specific code */
514
515 callout_stop(&expire_upcalls_ch);
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516 crit_enter();
517 if ((lmsg->ms_flags & MSGF_DONE) == 0)
518 lwkt_dropmsg(lmsg);
519 crit_exit();
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520
521 /*
522 * Free all multicast forwarding cache entries.
523 */
524 for (i = 0; i < MF6CTBLSIZ; i++) {
525 rt = mf6ctable[i];
526 while (rt) {
527 struct mf6c *frt;
528
529 for (rte = rt->mf6c_stall; rte != NULL; ) {
530 struct rtdetq *n = rte->next;
531
de99dcea 532 m_freem(rte->m);
efda3bd0 533 kfree(rte, M_MRTABLE);
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534 rte = n;
535 }
536 frt = rt;
537 rt = rt->mf6c_next;
efda3bd0 538 kfree(frt, M_MRTABLE);
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539 }
540 }
541
542 bzero((caddr_t)mf6ctable, sizeof(mf6ctable));
543
544 /*
545 * Reset de-encapsulation cache
546 */
547 reg_mif_num = -1;
548
549 ip6_mrouter = NULL;
550 ip6_mrouter_ver = 0;
551
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552#ifdef MRT6DEBUG
553 if (mrt6debug)
554 log(LOG_DEBUG, "ip6_mrouter_done\n");
555#endif
556
557 return 0;
558}
559
560static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 };
561
562/*
563 * Add a mif to the mif table
564 */
565static int
122ebd49 566add_m6if(struct mif6ctl *mifcp)
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567{
568 struct mif6 *mifp;
569 struct ifnet *ifp;
abf782b3 570 int error;
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571#ifdef notyet
572 struct tbf *m_tbf = tbftable + mifcp->mif6c_mifi;
573#endif
574
575 if (mifcp->mif6c_mifi >= MAXMIFS)
576 return EINVAL;
577 mifp = mif6table + mifcp->mif6c_mifi;
578 if (mifp->m6_ifp)
579 return EADDRINUSE; /* XXX: is it appropriate? */
580 if (mifcp->mif6c_pifi == 0 || mifcp->mif6c_pifi > if_index)
581 return ENXIO;
582 ifp = ifindex2ifnet[mifcp->mif6c_pifi];
583
584 if (mifcp->mif6c_flags & MIFF_REGISTER) {
585 if (reg_mif_num == (mifi_t)-1) {
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586 strlcpy(multicast_register_if.if_xname, "register_mif",
587 IFNAMSIZ);
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588 multicast_register_if.if_flags |= IFF_LOOPBACK;
589 multicast_register_if.if_index = mifcp->mif6c_mifi;
590 reg_mif_num = mifcp->mif6c_mifi;
591 }
592
593 ifp = &multicast_register_if;
594
595 } /* if REGISTER */
596 else {
597 /* Make sure the interface supports multicast */
598 if ((ifp->if_flags & IFF_MULTICAST) == 0)
599 return EOPNOTSUPP;
600
abf782b3 601 crit_enter();
984263bc 602 error = if_allmulti(ifp, 1);
abf782b3 603 crit_exit();
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604 if (error)
605 return error;
606 }
607
abf782b3 608 crit_enter();
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609 mifp->m6_flags = mifcp->mif6c_flags;
610 mifp->m6_ifp = ifp;
611#ifdef notyet
612 /* scaling up here allows division by 1024 in critical code */
613 mifp->m6_rate_limit = mifcp->mif6c_rate_limit * 1024 / 1000;
614#endif
615 /* initialize per mif pkt counters */
616 mifp->m6_pkt_in = 0;
617 mifp->m6_pkt_out = 0;
618 mifp->m6_bytes_in = 0;
619 mifp->m6_bytes_out = 0;
abf782b3 620 crit_exit();
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621
622 /* Adjust nummifs up if the mifi is higher than nummifs */
623 if (nummifs <= mifcp->mif6c_mifi)
624 nummifs = mifcp->mif6c_mifi + 1;
625
626#ifdef MRT6DEBUG
627 if (mrt6debug)
628 log(LOG_DEBUG,
3e4a09e7 629 "add_mif #%d, phyint %s\n",
984263bc 630 mifcp->mif6c_mifi,
3e4a09e7 631 ifp->if_xname);
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632#endif
633
634 return 0;
635}
636
637/*
638 * Delete a mif from the mif table
639 */
640static int
122ebd49 641del_m6if(mifi_t *mifip)
984263bc
MD
642{
643 struct mif6 *mifp = mif6table + *mifip;
644 mifi_t mifi;
645 struct ifnet *ifp;
984263bc
MD
646
647 if (*mifip >= nummifs)
648 return EINVAL;
649 if (mifp->m6_ifp == NULL)
650 return EINVAL;
651
abf782b3 652 crit_enter();
984263bc
MD
653
654 if (!(mifp->m6_flags & MIFF_REGISTER)) {
655 /*
656 * XXX: what if there is yet IPv4 multicast daemon
657 * using the interface?
658 */
659 ifp = mifp->m6_ifp;
660
661 if_allmulti(ifp, 0);
662 }
663
664#ifdef notyet
665 bzero((caddr_t)qtable[*mifip], sizeof(qtable[*mifip]));
666 bzero((caddr_t)mifp->m6_tbf, sizeof(*(mifp->m6_tbf)));
667#endif
668 bzero((caddr_t)mifp, sizeof (*mifp));
669
670 /* Adjust nummifs down */
671 for (mifi = nummifs; mifi > 0; mifi--)
672 if (mif6table[mifi - 1].m6_ifp)
673 break;
674 nummifs = mifi;
675
abf782b3 676 crit_exit();
984263bc
MD
677
678#ifdef MRT6DEBUG
679 if (mrt6debug)
680 log(LOG_DEBUG, "del_m6if %d, nummifs %d\n", *mifip, nummifs);
681#endif
682
683 return 0;
684}
685
686/*
687 * Add an mfc entry
688 */
689static int
122ebd49 690add_m6fc(struct mf6cctl *mfccp)
984263bc
MD
691{
692 struct mf6c *rt;
693 u_long hash;
694 struct rtdetq *rte;
695 u_short nstl;
984263bc
MD
696
697 MF6CFIND(mfccp->mf6cc_origin.sin6_addr,
698 mfccp->mf6cc_mcastgrp.sin6_addr, rt);
699
700 /* If an entry already exists, just update the fields */
701 if (rt) {
702#ifdef MRT6DEBUG
703 if (mrt6debug & DEBUG_MFC)
704 log(LOG_DEBUG,
705 "add_m6fc no upcall h %d o %s g %s p %x\n",
706 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
707 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
708 mfccp->mf6cc_parent);
709#endif
710
abf782b3 711 crit_enter();
984263bc
MD
712 rt->mf6c_parent = mfccp->mf6cc_parent;
713 rt->mf6c_ifset = mfccp->mf6cc_ifset;
abf782b3 714 crit_exit();
984263bc
MD
715 return 0;
716 }
717
718 /*
719 * Find the entry for which the upcall was made and update
720 */
abf782b3 721 crit_enter();
984263bc
MD
722 hash = MF6CHASH(mfccp->mf6cc_origin.sin6_addr,
723 mfccp->mf6cc_mcastgrp.sin6_addr);
724 for (rt = mf6ctable[hash], nstl = 0; rt; rt = rt->mf6c_next) {
725 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr,
726 &mfccp->mf6cc_origin.sin6_addr) &&
727 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr,
728 &mfccp->mf6cc_mcastgrp.sin6_addr) &&
729 (rt->mf6c_stall != NULL)) {
730
731 if (nstl++)
732 log(LOG_ERR,
733 "add_m6fc: %s o %s g %s p %x dbx %p\n",
734 "multiple kernel entries",
735 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
736 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
737 mfccp->mf6cc_parent, rt->mf6c_stall);
738
739#ifdef MRT6DEBUG
740 if (mrt6debug & DEBUG_MFC)
741 log(LOG_DEBUG,
742 "add_m6fc o %s g %s p %x dbg %x\n",
743 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
744 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
745 mfccp->mf6cc_parent, rt->mf6c_stall);
746#endif
747
748 rt->mf6c_origin = mfccp->mf6cc_origin;
749 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
750 rt->mf6c_parent = mfccp->mf6cc_parent;
751 rt->mf6c_ifset = mfccp->mf6cc_ifset;
752 /* initialize pkt counters per src-grp */
753 rt->mf6c_pkt_cnt = 0;
754 rt->mf6c_byte_cnt = 0;
755 rt->mf6c_wrong_if = 0;
756
757 rt->mf6c_expire = 0; /* Don't clean this guy up */
758 n6expire[hash]--;
759
760 /* free packets Qed at the end of this entry */
761 for (rte = rt->mf6c_stall; rte != NULL; ) {
762 struct rtdetq *n = rte->next;
763 ip6_mdq(rte->m, rte->ifp, rt);
764 m_freem(rte->m);
765#ifdef UPCALL_TIMING
766 collate(&(rte->t));
767#endif /* UPCALL_TIMING */
efda3bd0 768 kfree(rte, M_MRTABLE);
984263bc
MD
769 rte = n;
770 }
771 rt->mf6c_stall = NULL;
772 }
773 }
774
775 /*
776 * It is possible that an entry is being inserted without an upcall
777 */
778 if (nstl == 0) {
779#ifdef MRT6DEBUG
780 if (mrt6debug & DEBUG_MFC)
781 log(LOG_DEBUG,"add_mfc no upcall h %d o %s g %s p %x\n",
782 hash,
783 ip6_sprintf(&mfccp->mf6cc_origin.sin6_addr),
784 ip6_sprintf(&mfccp->mf6cc_mcastgrp.sin6_addr),
785 mfccp->mf6cc_parent);
786#endif
787
788 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) {
984263bc
MD
789 if (IN6_ARE_ADDR_EQUAL(&rt->mf6c_origin.sin6_addr,
790 &mfccp->mf6cc_origin.sin6_addr)&&
791 IN6_ARE_ADDR_EQUAL(&rt->mf6c_mcastgrp.sin6_addr,
792 &mfccp->mf6cc_mcastgrp.sin6_addr)) {
793
794 rt->mf6c_origin = mfccp->mf6cc_origin;
795 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
796 rt->mf6c_parent = mfccp->mf6cc_parent;
797 rt->mf6c_ifset = mfccp->mf6cc_ifset;
798 /* initialize pkt counters per src-grp */
799 rt->mf6c_pkt_cnt = 0;
800 rt->mf6c_byte_cnt = 0;
801 rt->mf6c_wrong_if = 0;
802
803 if (rt->mf6c_expire)
804 n6expire[hash]--;
805 rt->mf6c_expire = 0;
806 }
807 }
808 if (rt == NULL) {
809 /* no upcall, so make a new entry */
efda3bd0 810 rt = (struct mf6c *)kmalloc(sizeof(*rt), M_MRTABLE,
984263bc
MD
811 M_NOWAIT);
812 if (rt == NULL) {
abf782b3 813 crit_exit();
984263bc
MD
814 return ENOBUFS;
815 }
1af953ac 816
984263bc
MD
817 /* insert new entry at head of hash chain */
818 rt->mf6c_origin = mfccp->mf6cc_origin;
819 rt->mf6c_mcastgrp = mfccp->mf6cc_mcastgrp;
820 rt->mf6c_parent = mfccp->mf6cc_parent;
821 rt->mf6c_ifset = mfccp->mf6cc_ifset;
822 /* initialize pkt counters per src-grp */
823 rt->mf6c_pkt_cnt = 0;
824 rt->mf6c_byte_cnt = 0;
825 rt->mf6c_wrong_if = 0;
826 rt->mf6c_expire = 0;
827 rt->mf6c_stall = NULL;
1af953ac 828
984263bc
MD
829 /* link into table */
830 rt->mf6c_next = mf6ctable[hash];
831 mf6ctable[hash] = rt;
832 }
833 }
abf782b3 834 crit_exit();
984263bc
MD
835 return 0;
836}
837
838#ifdef UPCALL_TIMING
839/*
840 * collect delay statistics on the upcalls
841 */
842static void
122ebd49 843collate(struct timeval *t)
984263bc
MD
844{
845 u_long d;
846 struct timeval tp;
847 u_long delta;
848
849 GET_TIME(tp);
850
851 if (TV_LT(*t, tp))
852 {
853 TV_DELTA(tp, *t, delta);
1af953ac 854
984263bc
MD
855 d = delta >> 10;
856 if (d > UPCALL_MAX)
857 d = UPCALL_MAX;
1af953ac 858
984263bc
MD
859 ++upcall_data[d];
860 }
861}
862#endif /* UPCALL_TIMING */
863
864/*
865 * Delete an mfc entry
866 */
867static int
122ebd49 868del_m6fc(struct mf6cctl *mfccp)
984263bc
MD
869{
870 struct sockaddr_in6 origin;
871 struct sockaddr_in6 mcastgrp;
872 struct mf6c *rt;
873 struct mf6c **nptr;
874 u_long hash;
984263bc
MD
875
876 origin = mfccp->mf6cc_origin;
877 mcastgrp = mfccp->mf6cc_mcastgrp;
878 hash = MF6CHASH(origin.sin6_addr, mcastgrp.sin6_addr);
879
880#ifdef MRT6DEBUG
881 if (mrt6debug & DEBUG_MFC)
882 log(LOG_DEBUG,"del_m6fc orig %s mcastgrp %s\n",
883 ip6_sprintf(&origin.sin6_addr),
884 ip6_sprintf(&mcastgrp.sin6_addr));
885#endif
886
abf782b3 887 crit_enter();
984263bc
MD
888
889 nptr = &mf6ctable[hash];
890 while ((rt = *nptr) != NULL) {
891 if (IN6_ARE_ADDR_EQUAL(&origin.sin6_addr,
892 &rt->mf6c_origin.sin6_addr) &&
893 IN6_ARE_ADDR_EQUAL(&mcastgrp.sin6_addr,
894 &rt->mf6c_mcastgrp.sin6_addr) &&
895 rt->mf6c_stall == NULL)
896 break;
897
898 nptr = &rt->mf6c_next;
899 }
900 if (rt == NULL) {
abf782b3 901 crit_exit();
984263bc
MD
902 return EADDRNOTAVAIL;
903 }
904
905 *nptr = rt->mf6c_next;
efda3bd0 906 kfree(rt, M_MRTABLE);
984263bc 907
abf782b3 908 crit_exit();
984263bc
MD
909
910 return 0;
911}
912
913static int
e475836d 914socket_send(struct socket *so, struct mbuf *mm, struct sockaddr_in6 *src)
984263bc 915{
e475836d
MD
916 if (so) {
917 lwkt_gettoken(&so->so_rcv.ssb_token);
918 if (ssb_appendaddr(&so->so_rcv,
984263bc 919 (struct sockaddr *)src,
60233e58 920 mm, NULL) != 0) {
e475836d
MD
921 sorwakeup(so);
922 lwkt_reltoken(&so->so_rcv.ssb_token);
984263bc 923 return 0;
7eaeff3d
RM
924 } else
925 soroverflow(so);
e475836d 926 lwkt_reltoken(&so->so_rcv.ssb_token);
984263bc
MD
927 }
928 m_freem(mm);
929 return -1;
930}
931
932/*
933 * IPv6 multicast forwarding function. This function assumes that the packet
934 * pointed to by "ip6" has arrived on (or is about to be sent to) the interface
935 * pointed to by "ifp", and the packet is to be relayed to other networks
936 * that have members of the packet's destination IPv6 multicast group.
937 *
938 * The packet is returned unscathed to the caller, unless it is
939 * erroneous, in which case a non-zero return value tells the caller to
940 * discard it.
941 */
942
943int
122ebd49 944ip6_mforward(struct ip6_hdr *ip6, struct ifnet *ifp, struct mbuf *m)
984263bc
MD
945{
946 struct mf6c *rt;
947 struct mif6 *mifp;
948 struct mbuf *mm;
984263bc
MD
949 mifi_t mifi;
950
951#ifdef MRT6DEBUG
952 if (mrt6debug & DEBUG_FORWARD)
953 log(LOG_DEBUG, "ip6_mforward: src %s, dst %s, ifindex %d\n",
954 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst),
955 ifp->if_index);
956#endif
957
958 /*
959 * Don't forward a packet with Hop limit of zero or one,
960 * or a packet destined to a local-only group.
961 */
cb3deea5 962 if (ip6->ip6_hlim <= 1 || IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst) ||
984263bc
MD
963 IN6_IS_ADDR_MC_LINKLOCAL(&ip6->ip6_dst))
964 return 0;
965 ip6->ip6_hlim--;
966
967 /*
968 * Source address check: do not forward packets with unspecified
969 * source. It was discussed in July 2000, on ipngwg mailing list.
970 * This is rather more serious than unicast cases, because some
971 * MLD packets can be sent with the unspecified source address
972 * (although such packets must normally set 1 to the hop limit field).
973 */
974 if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) {
975 ip6stat.ip6s_cantforward++;
cec73927
MD
976 if (ip6_log_time + ip6_log_interval < time_uptime) {
977 ip6_log_time = time_uptime;
984263bc
MD
978 log(LOG_DEBUG,
979 "cannot forward "
980 "from %s to %s nxt %d received on %s\n",
981 ip6_sprintf(&ip6->ip6_src),
982 ip6_sprintf(&ip6->ip6_dst),
983 ip6->ip6_nxt,
984 if_name(m->m_pkthdr.rcvif));
985 }
986 return 0;
987 }
988
989 /*
990 * Determine forwarding mifs from the forwarding cache table
991 */
abf782b3 992 crit_enter();
984263bc
MD
993 MF6CFIND(ip6->ip6_src, ip6->ip6_dst, rt);
994
995 /* Entry exists, so forward if necessary */
996 if (rt) {
abf782b3 997 crit_exit();
984263bc
MD
998 return (ip6_mdq(m, ifp, rt));
999 } else {
1000 /*
1001 * If we don't have a route for packet's origin,
1002 * Make a copy of the packet &
1003 * send message to routing daemon
1004 */
1005
1006 struct mbuf *mb0;
1007 struct rtdetq *rte;
1008 u_long hash;
1009/* int i, npkts;*/
1010#ifdef UPCALL_TIMING
1011 struct timeval tp;
1012
1013 GET_TIME(tp);
1014#endif /* UPCALL_TIMING */
1015
1016 mrt6stat.mrt6s_no_route++;
1017#ifdef MRT6DEBUG
1018 if (mrt6debug & (DEBUG_FORWARD | DEBUG_MFC))
1019 log(LOG_DEBUG, "ip6_mforward: no rte s %s g %s\n",
1020 ip6_sprintf(&ip6->ip6_src),
1021 ip6_sprintf(&ip6->ip6_dst));
1022#endif
1023
1024 /*
1025 * Allocate mbufs early so that we don't do extra work if we
1026 * are just going to fail anyway.
1027 */
efda3bd0 1028 rte = (struct rtdetq *)kmalloc(sizeof(*rte), M_MRTABLE,
984263bc
MD
1029 M_NOWAIT);
1030 if (rte == NULL) {
abf782b3 1031 crit_exit();
984263bc
MD
1032 return ENOBUFS;
1033 }
1034 mb0 = m_copy(m, 0, M_COPYALL);
1035 /*
1036 * Pullup packet header if needed before storing it,
1037 * as other references may modify it in the meantime.
1038 */
1039 if (mb0 &&
1040 (M_HASCL(mb0) || mb0->m_len < sizeof(struct ip6_hdr)))
1041 mb0 = m_pullup(mb0, sizeof(struct ip6_hdr));
1042 if (mb0 == NULL) {
efda3bd0 1043 kfree(rte, M_MRTABLE);
abf782b3 1044 crit_exit();
984263bc
MD
1045 return ENOBUFS;
1046 }
1af953ac 1047
984263bc
MD
1048 /* is there an upcall waiting for this packet? */
1049 hash = MF6CHASH(ip6->ip6_src, ip6->ip6_dst);
1050 for (rt = mf6ctable[hash]; rt; rt = rt->mf6c_next) {
1051 if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_src,
1052 &rt->mf6c_origin.sin6_addr) &&
1053 IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
1054 &rt->mf6c_mcastgrp.sin6_addr) &&
1055 (rt->mf6c_stall != NULL))
1056 break;
1057 }
1058
1059 if (rt == NULL) {
1060 struct mrt6msg *im;
1061#ifdef MRT6_OINIT
1062 struct omrt6msg *oim;
1063#endif
1064
1065 /* no upcall, so make a new entry */
efda3bd0 1066 rt = (struct mf6c *)kmalloc(sizeof(*rt), M_MRTABLE,
984263bc
MD
1067 M_NOWAIT);
1068 if (rt == NULL) {
efda3bd0 1069 kfree(rte, M_MRTABLE);
984263bc 1070 m_freem(mb0);
abf782b3 1071 crit_exit();
984263bc
MD
1072 return ENOBUFS;
1073 }
1074 /*
1075 * Make a copy of the header to send to the user
1076 * level process
1077 */
1078 mm = m_copy(mb0, 0, sizeof(struct ip6_hdr));
1079
1080 if (mm == NULL) {
efda3bd0 1081 kfree(rte, M_MRTABLE);
984263bc 1082 m_freem(mb0);
efda3bd0 1083 kfree(rt, M_MRTABLE);
abf782b3 1084 crit_exit();
984263bc
MD
1085 return ENOBUFS;
1086 }
1087
1088 /*
1089 * Send message to routing daemon
1090 */
1091 sin6.sin6_addr = ip6->ip6_src;
1af953ac 1092
984263bc
MD
1093 im = NULL;
1094#ifdef MRT6_OINIT
1095 oim = NULL;
1096#endif
1097 switch (ip6_mrouter_ver) {
1098#ifdef MRT6_OINIT
1099 case MRT6_OINIT:
1100 oim = mtod(mm, struct omrt6msg *);
1101 oim->im6_msgtype = MRT6MSG_NOCACHE;
1102 oim->im6_mbz = 0;
1103 break;
1104#endif
1105 case MRT6_INIT:
1106 im = mtod(mm, struct mrt6msg *);
1107 im->im6_msgtype = MRT6MSG_NOCACHE;
1108 im->im6_mbz = 0;
1109 break;
1110 default:
efda3bd0 1111 kfree(rte, M_MRTABLE);
984263bc 1112 m_freem(mb0);
efda3bd0 1113 kfree(rt, M_MRTABLE);
abf782b3 1114 crit_exit();
984263bc
MD
1115 return EINVAL;
1116 }
1117
1118#ifdef MRT6DEBUG
1119 if (mrt6debug & DEBUG_FORWARD)
1120 log(LOG_DEBUG,
1121 "getting the iif info in the kernel\n");
1122#endif
1123
1124 for (mifp = mif6table, mifi = 0;
1125 mifi < nummifs && mifp->m6_ifp != ifp;
1126 mifp++, mifi++)
1127 ;
1128
1129 switch (ip6_mrouter_ver) {
1130#ifdef MRT6_OINIT
1131 case MRT6_OINIT:
1132 oim->im6_mif = mifi;
1133 break;
1134#endif
1135 case MRT6_INIT:
1136 im->im6_mif = mifi;
1137 break;
1138 }
1139
1140 if (socket_send(ip6_mrouter, mm, &sin6) < 0) {
1141 log(LOG_WARNING, "ip6_mforward: ip6_mrouter "
1142 "socket queue full\n");
1143 mrt6stat.mrt6s_upq_sockfull++;
efda3bd0 1144 kfree(rte, M_MRTABLE);
984263bc 1145 m_freem(mb0);
efda3bd0 1146 kfree(rt, M_MRTABLE);
abf782b3 1147 crit_exit();
984263bc
MD
1148 return ENOBUFS;
1149 }
1150
1151 mrt6stat.mrt6s_upcalls++;
1152
1153 /* insert new entry at head of hash chain */
1154 bzero(rt, sizeof(*rt));
1155 rt->mf6c_origin.sin6_family = AF_INET6;
1156 rt->mf6c_origin.sin6_len = sizeof(struct sockaddr_in6);
1157 rt->mf6c_origin.sin6_addr = ip6->ip6_src;
1158 rt->mf6c_mcastgrp.sin6_family = AF_INET6;
1159 rt->mf6c_mcastgrp.sin6_len = sizeof(struct sockaddr_in6);
1160 rt->mf6c_mcastgrp.sin6_addr = ip6->ip6_dst;
1161 rt->mf6c_expire = UPCALL_EXPIRE;
1162 n6expire[hash]++;
1163 rt->mf6c_parent = MF6C_INCOMPLETE_PARENT;
1164
1165 /* link into table */
1166 rt->mf6c_next = mf6ctable[hash];
1167 mf6ctable[hash] = rt;
1168 /* Add this entry to the end of the queue */
1169 rt->mf6c_stall = rte;
1170 } else {
1171 /* determine if q has overflowed */
1172 struct rtdetq **p;
1173 int npkts = 0;
1174
1175 for (p = &rt->mf6c_stall; *p != NULL; p = &(*p)->next)
1176 if (++npkts > MAX_UPQ6) {
1177 mrt6stat.mrt6s_upq_ovflw++;
efda3bd0 1178 kfree(rte, M_MRTABLE);
984263bc 1179 m_freem(mb0);
abf782b3 1180 crit_exit();
984263bc
MD
1181 return 0;
1182 }
1183
1184 /* Add this entry to the end of the queue */
1185 *p = rte;
1186 }
1187
1188 rte->next = NULL;
1189 rte->m = mb0;
1190 rte->ifp = ifp;
1191#ifdef UPCALL_TIMING
1192 rte->t = tp;
1193#endif /* UPCALL_TIMING */
1194
abf782b3 1195 crit_exit();
984263bc
MD
1196
1197 return 0;
1198 }
1199}
1200
1201/*
1202 * Clean up cache entries if upcalls are not serviced
1203 * Call from the Slow Timeout mechanism, every half second.
1204 */
1205static void
736b6ebe 1206expire_upcalls_dispatch(netmsg_t nmsg)
984263bc
MD
1207{
1208 struct rtdetq *rte;
1209 struct mf6c *mfc, **nptr;
1210 int i;
984263bc 1211
5204e13c 1212 ASSERT_NETISR0;
736b6ebe
SZ
1213
1214 /* Reply ASAP */
abf782b3 1215 crit_enter();
736b6ebe
SZ
1216 lwkt_replymsg(&nmsg->lmsg, 0);
1217 crit_exit();
1218
984263bc
MD
1219 for (i = 0; i < MF6CTBLSIZ; i++) {
1220 if (n6expire[i] == 0)
1221 continue;
1222 nptr = &mf6ctable[i];
1223 while ((mfc = *nptr) != NULL) {
1224 rte = mfc->mf6c_stall;
1225 /*
1226 * Skip real cache entries
1227 * Make sure it wasn't marked to not expire (shouldn't happen)
1228 * If it expires now
1229 */
1230 if (rte != NULL &&
1231 mfc->mf6c_expire != 0 &&
1232 --mfc->mf6c_expire == 0) {
1233#ifdef MRT6DEBUG
1234 if (mrt6debug & DEBUG_EXPIRE)
1235 log(LOG_DEBUG, "expire_upcalls: expiring (%s %s)\n",
1236 ip6_sprintf(&mfc->mf6c_origin.sin6_addr),
1237 ip6_sprintf(&mfc->mf6c_mcastgrp.sin6_addr));
1238#endif
1239 /*
1240 * drop all the packets
1241 * free the mbuf with the pkt, if, timing info
1242 */
1243 do {
1244 struct rtdetq *n = rte->next;
1245 m_freem(rte->m);
efda3bd0 1246 kfree(rte, M_MRTABLE);
984263bc
MD
1247 rte = n;
1248 } while (rte != NULL);
1249 mrt6stat.mrt6s_cache_cleanups++;
1250 n6expire[i]--;
1251
1252 *nptr = mfc->mf6c_next;
efda3bd0 1253 kfree(mfc, M_MRTABLE);
984263bc
MD
1254 } else {
1255 nptr = &mfc->mf6c_next;
1256 }
1257 }
1258 }
984263bc
MD
1259 callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT,
1260 expire_upcalls, NULL);
1261}
1262
736b6ebe
SZ
1263static void
1264expire_upcalls(void *arg __unused)
1265{
1266 struct lwkt_msg *lmsg = &expire_upcalls_nmsg.lmsg;
1267
1268 KASSERT(mycpuid == 0, ("expire upcalls timer not on cpu0"));
1269
1270 crit_enter();
1271 if (lmsg->ms_flags & MSGF_DONE)
1272 lwkt_sendmsg_oncpu(netisr_cpuport(0), lmsg);
1273 crit_exit();
1274}
1275
984263bc
MD
1276/*
1277 * Packet forwarding routine once entry in the cache is made
1278 */
1279static int
122ebd49 1280ip6_mdq(struct mbuf *m, struct ifnet *ifp, struct mf6c *rt)
984263bc
MD
1281{
1282 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
1283 mifi_t mifi, iif;
1284 struct mif6 *mifp;
1285 int plen = m->m_pkthdr.len;
416fd1c1 1286 u_int32_t dscopein, sscopein;
984263bc
MD
1287
1288/*
1289 * Macro to send packet on mif. Since RSVP packets don't get counted on
1290 * input, they shouldn't get counted on output, so statistics keeping is
7a44d1cb 1291 * separate.
984263bc
MD
1292 */
1293
1af953ac
SZ
1294#define MC6_SEND(ip6, mifp, m) do { \
1295 if ((mifp)->m6_flags & MIFF_REGISTER) \
1296 register_send((ip6), (mifp), (m)); \
1297 else \
1298 phyint_send((ip6), (mifp), (m)); \
984263bc
MD
1299} while (0)
1300
1301 /*
1302 * Don't forward if it didn't arrive from the parent mif
1303 * for its origin.
1304 */
1305 mifi = rt->mf6c_parent;
1306 if ((mifi >= nummifs) || (mif6table[mifi].m6_ifp != ifp)) {
1307 /* came in the wrong interface */
1308#ifdef MRT6DEBUG
1309 if (mrt6debug & DEBUG_FORWARD)
1310 log(LOG_DEBUG,
1311 "wrong if: ifid %d mifi %d mififid %x\n",
1312 ifp->if_index, mifi,
1313 mif6table[mifi].m6_ifp->if_index);
1314#endif
1315 mrt6stat.mrt6s_wrong_if++;
1316 rt->mf6c_wrong_if++;
1317 /*
1318 * If we are doing PIM processing, and we are forwarding
1319 * packets on this interface, send a message to the
1320 * routing daemon.
1321 */
1322 /* have to make sure this is a valid mif */
1323 if (mifi < nummifs && mif6table[mifi].m6_ifp)
1324 if (pim6 && (m->m_flags & M_LOOP) == 0) {
1325 /*
1326 * Check the M_LOOP flag to avoid an
1327 * unnecessary PIM assert.
1328 * XXX: M_LOOP is an ad-hoc hack...
1329 */
1330 static struct sockaddr_in6 sin6 =
1331 { sizeof(sin6), AF_INET6 };
1332
1333 struct mbuf *mm;
1334 struct mrt6msg *im;
1335#ifdef MRT6_OINIT
1336 struct omrt6msg *oim;
1337#endif
1338
1339 mm = m_copy(m, 0, sizeof(struct ip6_hdr));
1340 if (mm &&
1341 (M_HASCL(mm) ||
1342 mm->m_len < sizeof(struct ip6_hdr)))
1343 mm = m_pullup(mm, sizeof(struct ip6_hdr));
1344 if (mm == NULL)
1345 return ENOBUFS;
1af953ac 1346
984263bc
MD
1347#ifdef MRT6_OINIT
1348 oim = NULL;
1349#endif
1350 im = NULL;
1351 switch (ip6_mrouter_ver) {
1352#ifdef MRT6_OINIT
1353 case MRT6_OINIT:
1354 oim = mtod(mm, struct omrt6msg *);
1355 oim->im6_msgtype = MRT6MSG_WRONGMIF;
1356 oim->im6_mbz = 0;
1357 break;
1358#endif
1359 case MRT6_INIT:
1360 im = mtod(mm, struct mrt6msg *);
1361 im->im6_msgtype = MRT6MSG_WRONGMIF;
1362 im->im6_mbz = 0;
1363 break;
1364 default:
1365 m_freem(mm);
1366 return EINVAL;
1367 }
1368
1369 for (mifp = mif6table, iif = 0;
1370 iif < nummifs && mifp &&
1371 mifp->m6_ifp != ifp;
1372 mifp++, iif++)
1373 ;
1374
1375 switch (ip6_mrouter_ver) {
1376#ifdef MRT6_OINIT
1377 case MRT6_OINIT:
1378 oim->im6_mif = iif;
1379 sin6.sin6_addr = oim->im6_src;
1380 break;
1381#endif
1382 case MRT6_INIT:
1383 im->im6_mif = iif;
1384 sin6.sin6_addr = im->im6_src;
1385 break;
1386 }
1387
1388 mrt6stat.mrt6s_upcalls++;
1389
1390 if (socket_send(ip6_mrouter, mm, &sin6) < 0) {
1391#ifdef MRT6DEBUG
1392 if (mrt6debug)
1393 log(LOG_WARNING, "mdq, ip6_mrouter socket queue full\n");
1394#endif
1395 ++mrt6stat.mrt6s_upq_sockfull;
1396 return ENOBUFS;
1397 } /* if socket Q full */
1398 } /* if PIM */
1399 return 0;
1400 } /* if wrong iif */
1401
1402 /* If I sourced this packet, it counts as output, else it was input. */
1403 if (m->m_pkthdr.rcvif == NULL) {
1404 /* XXX: is rcvif really NULL when output?? */
1405 mif6table[mifi].m6_pkt_out++;
1406 mif6table[mifi].m6_bytes_out += plen;
1407 } else {
1408 mif6table[mifi].m6_pkt_in++;
1409 mif6table[mifi].m6_bytes_in += plen;
1410 }
1411 rt->mf6c_pkt_cnt++;
1412 rt->mf6c_byte_cnt += plen;
1413
1414 /*
1415 * For each mif, forward a copy of the packet if there are group
1416 * members downstream on the interface.
1417 */
416fd1c1
SZ
1418 if (in6_addr2zoneid(ifp, &ip6->ip6_dst, &dscopein) ||
1419 in6_addr2zoneid(ifp, &ip6->ip6_src, &sscopein))
1420 return (EINVAL);
1af953ac 1421 for (mifp = mif6table, mifi = 0; mifi < nummifs; mifp++, mifi++) {
984263bc 1422 if (IF_ISSET(mifi, &rt->mf6c_ifset)) {
416fd1c1
SZ
1423 u_int32_t dscopeout, sscopeout;
1424
984263bc
MD
1425 /*
1426 * check if the outgoing packet is going to break
1427 * a scope boundary.
1428 * XXX For packets through PIM register tunnel
1429 * interface, we believe a routing daemon.
1430 */
cb3deea5
SZ
1431 if (!(mif6table[rt->mf6c_parent].m6_flags &
1432 MIFF_REGISTER) &&
1433 !(mif6table[mifi].m6_flags & MIFF_REGISTER)) {
1434 if (in6_addr2zoneid(mif6table[mifi].m6_ifp,
1435 &ip6->ip6_dst,
1436 &dscopeout) ||
1437 in6_addr2zoneid(mif6table[mifi].m6_ifp,
1438 &ip6->ip6_src,
1439 &sscopeout) ||
cb3deea5
SZ
1440 dscopein != dscopeout ||
1441 sscopein != sscopeout) {
1442 ip6stat.ip6s_badscope++;
1443 continue;
1444 }
984263bc
MD
1445 }
1446
1447 mifp->m6_pkt_out++;
1448 mifp->m6_bytes_out += plen;
1449 MC6_SEND(ip6, mifp, m);
1450 }
1af953ac 1451 }
984263bc
MD
1452 return 0;
1453}
1454
1455static void
122ebd49 1456phyint_send(struct ip6_hdr *ip6, struct mif6 *mifp, struct mbuf *m)
984263bc
MD
1457{
1458 struct mbuf *mb_copy;
1459 struct ifnet *ifp = mifp->m6_ifp;
1460 int error = 0;
984263bc 1461 static struct route_in6 ro;
304e70d2 1462 struct in6_multi *in6m;
984263bc 1463 struct sockaddr_in6 *dst6;
304e70d2 1464 u_long linkmtu;
984263bc 1465
abf782b3
EN
1466 crit_enter(); /* needs to protect static "ro" below. */
1467
984263bc
MD
1468 /*
1469 * Make a new reference to the packet; make sure that
1470 * the IPv6 header is actually copied, not just referenced,
1471 * so that ip6_output() only scribbles on the copy.
1472 */
1473 mb_copy = m_copy(m, 0, M_COPYALL);
1474 if (mb_copy &&
1475 (M_HASCL(mb_copy) || mb_copy->m_len < sizeof(struct ip6_hdr)))
1476 mb_copy = m_pullup(mb_copy, sizeof(struct ip6_hdr));
1477 if (mb_copy == NULL) {
abf782b3 1478 crit_exit();
984263bc
MD
1479 return;
1480 }
1481 /* set MCAST flag to the outgoing packet */
1482 mb_copy->m_flags |= M_MCAST;
1483
1484 /*
1485 * If we sourced the packet, call ip6_output since we may devide
1486 * the packet into fragments when the packet is too big for the
1487 * outgoing interface.
1488 * Otherwise, we can simply send the packet to the interface
1489 * sending queue.
1490 */
1491 if (m->m_pkthdr.rcvif == NULL) {
1492 struct ip6_moptions im6o;
1493
1494 im6o.im6o_multicast_ifp = ifp;
1495 /* XXX: ip6_output will override ip6->ip6_hlim */
1496 im6o.im6o_multicast_hlim = ip6->ip6_hlim;
1497 im6o.im6o_multicast_loop = 1;
1498 error = ip6_output(mb_copy, NULL, &ro,
1499 IPV6_FORWARDING, &im6o, NULL, NULL);
1500
1501#ifdef MRT6DEBUG
1502 if (mrt6debug & DEBUG_XMIT)
1503 log(LOG_DEBUG, "phyint_send on mif %d err %d\n",
1504 mifp - mif6table, error);
1505#endif
abf782b3 1506 crit_exit();
984263bc
MD
1507 return;
1508 }
1509
1510 /*
1511 * If we belong to the destination multicast group
1512 * on the outgoing interface, loop back a copy.
1513 */
1514 dst6 = (struct sockaddr_in6 *)&ro.ro_dst;
72659ed0 1515 in6m = IN6_LOOKUP_MULTI(&ip6->ip6_dst, ifp);
984263bc
MD
1516 if (in6m != NULL) {
1517 dst6->sin6_len = sizeof(struct sockaddr_in6);
1518 dst6->sin6_family = AF_INET6;
1519 dst6->sin6_addr = ip6->ip6_dst;
1520 ip6_mloopback(ifp, m, (struct sockaddr_in6 *)&ro.ro_dst);
1521 }
1522 /*
1523 * Put the packet into the sending queue of the outgoing interface
1524 * if it would fit in the MTU of the interface.
1525 */
304e70d2
SZ
1526 linkmtu = IN6_LINKMTU(ifp);
1527 if (mb_copy->m_pkthdr.len <= linkmtu || linkmtu < IPV6_MMTU) {
984263bc
MD
1528 dst6->sin6_len = sizeof(struct sockaddr_in6);
1529 dst6->sin6_family = AF_INET6;
1530 dst6->sin6_addr = ip6->ip6_dst;
1531 /*
1532 * We just call if_output instead of nd6_output here, since
1533 * we need no ND for a multicast forwarded packet...right?
1534 */
9db4b353 1535 error = ifp->if_output(ifp, mb_copy,
984263bc
MD
1536 (struct sockaddr *)&ro.ro_dst, NULL);
1537#ifdef MRT6DEBUG
1538 if (mrt6debug & DEBUG_XMIT)
1539 log(LOG_DEBUG, "phyint_send on mif %d err %d\n",
1540 mifp - mif6table, error);
1541#endif
1542 } else {
1543#ifdef MULTICAST_PMTUD
304e70d2 1544 icmp6_error(mb_copy, ICMP6_PACKET_TOO_BIG, 0, linkmtu);
984263bc
MD
1545#else
1546#ifdef MRT6DEBUG
1547 if (mrt6debug & DEBUG_XMIT)
1548 log(LOG_DEBUG,
1549 "phyint_send: packet too big on %s o %s g %s"
1550 " size %d(discarded)\n",
1551 if_name(ifp),
1552 ip6_sprintf(&ip6->ip6_src),
1553 ip6_sprintf(&ip6->ip6_dst),
1554 mb_copy->m_pkthdr.len);
1555#endif /* MRT6DEBUG */
1556 m_freem(mb_copy); /* simply discard the packet */
1557#endif
1558 }
1559
abf782b3 1560 crit_exit();
984263bc
MD
1561}
1562
1563static int
122ebd49 1564register_send(struct ip6_hdr *ip6, struct mif6 *mif, struct mbuf *m)
984263bc
MD
1565{
1566 struct mbuf *mm;
1567 int i, len = m->m_pkthdr.len;
1568 static struct sockaddr_in6 sin6 = { sizeof(sin6), AF_INET6 };
1569 struct mrt6msg *im6;
1570
1571#ifdef MRT6DEBUG
1572 if (mrt6debug)
1573 log(LOG_DEBUG, "** IPv6 register_send **\n src %s dst %s\n",
1574 ip6_sprintf(&ip6->ip6_src), ip6_sprintf(&ip6->ip6_dst));
1575#endif
1576 ++pim6stat.pim6s_snd_registers;
1577
1578 /* Make a copy of the packet to send to the user level process */
b5523eac 1579 MGETHDR(mm, M_NOWAIT, MT_HEADER);
984263bc
MD
1580 if (mm == NULL)
1581 return ENOBUFS;
1582 mm->m_pkthdr.rcvif = NULL;
1583 mm->m_data += max_linkhdr;
1584 mm->m_len = sizeof(struct ip6_hdr);
1585
1586 if ((mm->m_next = m_copy(m, 0, M_COPYALL)) == NULL) {
1587 m_freem(mm);
1588 return ENOBUFS;
1589 }
1590 i = MHLEN - M_LEADINGSPACE(mm);
1591 if (i > len)
1592 i = len;
1593 mm = m_pullup(mm, i);
1594 if (mm == NULL)
1595 return ENOBUFS;
1596/* TODO: check it! */
1597 mm->m_pkthdr.len = len + sizeof(struct ip6_hdr);
1598
1599 /*
1600 * Send message to routing daemon
1601 */
1602 sin6.sin6_addr = ip6->ip6_src;
1603
1604 im6 = mtod(mm, struct mrt6msg *);
1605 im6->im6_msgtype = MRT6MSG_WHOLEPKT;
1606 im6->im6_mbz = 0;
1607
1608 im6->im6_mif = mif - mif6table;
1609
1610 /* iif info is not given for reg. encap.n */
1611 mrt6stat.mrt6s_upcalls++;
1612
1613 if (socket_send(ip6_mrouter, mm, &sin6) < 0) {
1614#ifdef MRT6DEBUG
1615 if (mrt6debug)
1616 log(LOG_WARNING,
1617 "register_send: ip6_mrouter socket queue full\n");
1618#endif
1619 ++mrt6stat.mrt6s_upq_sockfull;
1620 return ENOBUFS;
1621 }
1622 return 0;
1623}
1624
1625/*
1626 * PIM sparse mode hook
1627 * Receives the pim control messages, and passes them up to the listening
1628 * socket, using rip6_input.
1629 * The only message processed is the REGISTER pim message; the pim header
1630 * is stripped off, and the inner packet is passed to register_mforward.
1631 */
1632int
122ebd49 1633pim6_input(struct mbuf **mp, int *offp, int proto)
984263bc
MD
1634{
1635 struct pim *pim; /* pointer to a pim struct */
1636 struct ip6_hdr *ip6;
1637 int pimlen;
1638 struct mbuf *m = *mp;
1639 int minlen;
1640 int off = *offp;
1641
1642 ++pim6stat.pim6s_rcv_total;
1643
1644 ip6 = mtod(m, struct ip6_hdr *);
1645 pimlen = m->m_pkthdr.len - *offp;
1646
1647 /*
1648 * Validate lengths
1649 */
1650 if (pimlen < PIM_MINLEN) {
1651 ++pim6stat.pim6s_rcv_tooshort;
1652#ifdef MRT6DEBUG
1653 if (mrt6debug & DEBUG_PIM)
1654 log(LOG_DEBUG,"pim6_input: PIM packet too short\n");
1655#endif
1656 m_freem(m);
bde3511a 1657 return (IPPROTO_DONE);
984263bc
MD
1658 }
1659
1660 /*
1661 * if the packet is at least as big as a REGISTER, go ahead
1662 * and grab the PIM REGISTER header size, to avoid another
1663 * possible m_pullup() later.
1664 *
1665 * PIM_MINLEN == pimhdr + u_int32 == 8
1666 * PIM6_REG_MINLEN == pimhdr + reghdr + eip6hdr == 4 + 4 + 40
1667 */
1668 minlen = (pimlen >= PIM6_REG_MINLEN) ? PIM6_REG_MINLEN : PIM_MINLEN;
1669
1670 /*
1671 * Make sure that the IP6 and PIM headers in contiguous memory, and
1672 * possibly the PIM REGISTER header
1673 */
1674#ifndef PULLDOWN_TEST
1675 IP6_EXTHDR_CHECK(m, off, minlen, IPPROTO_DONE);
1676 /* adjust pointer */
1677 ip6 = mtod(m, struct ip6_hdr *);
1678
1679 /* adjust mbuf to point to the PIM header */
1680 pim = (struct pim *)((caddr_t)ip6 + off);
1681#else
1682 IP6_EXTHDR_GET(pim, struct pim *, m, off, minlen);
1683 if (pim == NULL) {
1684 pim6stat.pim6s_rcv_tooshort++;
1685 return IPPROTO_DONE;
1686 }
1687#endif
1688
1689#define PIM6_CHECKSUM
1690#ifdef PIM6_CHECKSUM
1691 {
1692 int cksumlen;
1693
1694 /*
1695 * Validate checksum.
1696 * If PIM REGISTER, exclude the data packet
1697 */
1698 if (pim->pim_type == PIM_REGISTER)
1699 cksumlen = PIM_MINLEN;
1700 else
1701 cksumlen = pimlen;
1702
1703 if (in6_cksum(m, IPPROTO_PIM, off, cksumlen)) {
1704 ++pim6stat.pim6s_rcv_badsum;
1705#ifdef MRT6DEBUG
1706 if (mrt6debug & DEBUG_PIM)
1707 log(LOG_DEBUG,
1708 "pim6_input: invalid checksum\n");
1709#endif
1710 m_freem(m);
bde3511a 1711 return (IPPROTO_DONE);
984263bc
MD
1712 }
1713 }
1714#endif /* PIM_CHECKSUM */
1715
1716 /* PIM version check */
1717 if (pim->pim_ver != PIM_VERSION) {
1718 ++pim6stat.pim6s_rcv_badversion;
1719#ifdef MRT6DEBUG
1720 log(LOG_ERR,
1721 "pim6_input: incorrect version %d, expecting %d\n",
1722 pim->pim_ver, PIM_VERSION);
1723#endif
1724 m_freem(m);
bde3511a 1725 return (IPPROTO_DONE);
984263bc
MD
1726 }
1727
1728 if (pim->pim_type == PIM_REGISTER) {
1729 /*
1730 * since this is a REGISTER, we'll make a copy of the register
1731 * headers ip6+pim+u_int32_t+encap_ip6, to be passed up to the
1732 * routing daemon.
1733 */
1734 static struct sockaddr_in6 dst = { sizeof(dst), AF_INET6 };
1735
1736 struct mbuf *mcp;
1737 struct ip6_hdr *eip6;
1738 u_int32_t *reghdr;
1af953ac 1739
984263bc
MD
1740 ++pim6stat.pim6s_rcv_registers;
1741
1742 if ((reg_mif_num >= nummifs) || (reg_mif_num == (mifi_t) -1)) {
1743#ifdef MRT6DEBUG
1744 if (mrt6debug & DEBUG_PIM)
1745 log(LOG_DEBUG,
1746 "pim6_input: register mif not set: %d\n",
1747 reg_mif_num);
1748#endif
1749 m_freem(m);
bde3511a 1750 return (IPPROTO_DONE);
984263bc 1751 }
1af953ac 1752
984263bc 1753 reghdr = (u_int32_t *)(pim + 1);
1af953ac 1754
984263bc
MD
1755 if ((ntohl(*reghdr) & PIM_NULL_REGISTER))
1756 goto pim6_input_to_daemon;
1757
1758 /*
1759 * Validate length
1760 */
1761 if (pimlen < PIM6_REG_MINLEN) {
1762 ++pim6stat.pim6s_rcv_tooshort;
1763 ++pim6stat.pim6s_rcv_badregisters;
1764#ifdef MRT6DEBUG
1765 log(LOG_ERR,
1766 "pim6_input: register packet size too "
1767 "small %d from %s\n",
1768 pimlen, ip6_sprintf(&ip6->ip6_src));
1769#endif
1770 m_freem(m);
bde3511a 1771 return (IPPROTO_DONE);
984263bc 1772 }
1af953ac 1773
984263bc 1774 eip6 = (struct ip6_hdr *) (reghdr + 1);
1af953ac 1775#ifdef MRT6DEBUG
984263bc
MD
1776 if (mrt6debug & DEBUG_PIM)
1777 log(LOG_DEBUG,
1778 "pim6_input[register], eip6: %s -> %s, "
1779 "eip6 plen %d\n",
1780 ip6_sprintf(&eip6->ip6_src),
1781 ip6_sprintf(&eip6->ip6_dst),
1782 ntohs(eip6->ip6_plen));
1783#endif
1784
1785 /* verify the version number of the inner packet */
1786 if ((eip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
1787 ++pim6stat.pim6s_rcv_badregisters;
1788#ifdef MRT6DEBUG
1789 log(LOG_DEBUG, "pim6_input: invalid IP version (%d) "
1790 "of the inner packet\n",
1791 (eip6->ip6_vfc & IPV6_VERSION));
1792#endif
1793 m_freem(m);
d41f11ec 1794 return (IPPROTO_DONE);
984263bc 1795 }
1af953ac 1796
984263bc
MD
1797 /* verify the inner packet is destined to a mcast group */
1798 if (!IN6_IS_ADDR_MULTICAST(&eip6->ip6_dst)) {
1799 ++pim6stat.pim6s_rcv_badregisters;
1800#ifdef MRT6DEBUG
1801 if (mrt6debug & DEBUG_PIM)
1802 log(LOG_DEBUG,
1803 "pim6_input: inner packet of register "
1804 "is not multicast %s\n",
1805 ip6_sprintf(&eip6->ip6_dst));
1806#endif
1807 m_freem(m);
bde3511a 1808 return (IPPROTO_DONE);
984263bc 1809 }
1af953ac 1810
984263bc
MD
1811 /*
1812 * make a copy of the whole header to pass to the daemon later.
1813 */
1814 mcp = m_copy(m, 0, off + PIM6_REG_MINLEN);
1815 if (mcp == NULL) {
1816#ifdef MRT6DEBUG
1817 log(LOG_ERR,
1818 "pim6_input: pim register: "
1819 "could not copy register head\n");
1820#endif
1821 m_freem(m);
bde3511a 1822 return (IPPROTO_DONE);
984263bc 1823 }
1af953ac 1824
984263bc
MD
1825 /*
1826 * forward the inner ip6 packet; point m_data at the inner ip6.
1827 */
1828 m_adj(m, off + PIM_MINLEN);
1829#ifdef MRT6DEBUG
1830 if (mrt6debug & DEBUG_PIM) {
1831 log(LOG_DEBUG,
1832 "pim6_input: forwarding decapsulated register: "
1833 "src %s, dst %s, mif %d\n",
1834 ip6_sprintf(&eip6->ip6_src),
1835 ip6_sprintf(&eip6->ip6_dst),
1836 reg_mif_num);
1837 }
1838#endif
1839
1af953ac 1840 if_simloop(mif6table[reg_mif_num].m6_ifp, m,
651d02c5 1841 dst.sin6_family, 0);
984263bc
MD
1842
1843 /* prepare the register head to send to the mrouting daemon */
1844 m = mcp;
1845 }
1846
1847 /*
1848 * Pass the PIM message up to the daemon; if it is a register message
1849 * pass the 'head' only up to the daemon. This includes the
1850 * encapsulator ip6 header, pim header, register header and the
1851 * encapsulated ip6 header.
1852 */
bde3511a 1853pim6_input_to_daemon:
984263bc 1854 rip6_input(&m, offp, proto);
bde3511a 1855 return (IPPROTO_DONE);
984263bc 1856}