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31#include <linux/config.h>
32#include <linux/module.h>
33#include <linux/errno.h>
34#include <linux/types.h>
35#include <linux/string.h>
36#include <linux/socket.h>
37#include <linux/sockios.h>
38#include <linux/sched.h>
39#include <linux/net.h>
40#include <linux/in.h>
41#include <linux/in6.h>
42#include <linux/netdevice.h>
43#include <linux/if_arp.h>
44#include <linux/route.h>
45#include <linux/init.h>
46#include <linux/proc_fs.h>
47
48#include <linux/netfilter.h>
49#include <linux/netfilter_ipv6.h>
50
51#include <net/sock.h>
52#include <net/snmp.h>
53
54#include <net/ipv6.h>
55#include <net/protocol.h>
56#include <net/if_inet6.h>
57#include <net/ndisc.h>
58#include <net/addrconf.h>
59#include <net/ip6_route.h>
60
61#include <net/checksum.h>
62
63
64#define MCAST_DEBUG 2
65
66#if MCAST_DEBUG >= 3
67#define MDBG(x) printk x
68#else
69#define MDBG(x)
70#endif
71
72
73
74
75
76
77
78
79
80
81
82struct mld2_grec {
83 __u8 grec_type;
84 __u8 grec_auxwords;
85 __u16 grec_nsrcs;
86 struct in6_addr grec_mca;
87 struct in6_addr grec_src[0];
88};
89
90struct mld2_report {
91 __u8 type;
92 __u8 resv1;
93 __u16 csum;
94 __u16 resv2;
95 __u16 ngrec;
96 struct mld2_grec grec[0];
97};
98
99struct mld2_query {
100 __u8 type;
101 __u8 code;
102 __u16 csum;
103 __u16 mrc;
104 __u16 resv1;
105 struct in6_addr mca;
106#if defined(__LITTLE_ENDIAN_BITFIELD)
107 __u8 qrv:3,
108 suppress:1,
109 resv2:4;
110#elif defined(__BIG_ENDIAN_BITFIELD)
111 __u8 resv2:4,
112 suppress:1,
113 qrv:3;
114#else
115#error "Please fix <asm/byteorder.h>"
116#endif
117 __u8 qqic;
118 __u16 nsrcs;
119 struct in6_addr srcs[0];
120};
121
122struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
123struct in6_addr all_nodes_addr = {{{0xff,0x02,0,0,0,0,0,0,0,0,0,0,0,0,0,0x1}}};
124
125
126static rwlock_t ipv6_sk_mc_lock = RW_LOCK_UNLOCKED;
127
128static struct socket *igmp6_socket;
129
130static void igmp6_join_group(struct ifmcaddr6 *ma);
131static void igmp6_leave_group(struct ifmcaddr6 *ma);
132static void igmp6_timer_handler(unsigned long data);
133
134static void mld_gq_timer_expire(unsigned long data);
135static void mld_ifc_timer_expire(unsigned long data);
136static void mld_ifc_event(struct inet6_dev *idev);
137static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
138static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *addr);
139static void mld_clear_delrec(struct inet6_dev *idev);
140static int sf_setstate(struct ifmcaddr6 *pmc);
141static void sf_markstate(struct ifmcaddr6 *pmc);
142static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
143int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, int sfmode,
144 int sfcount, struct in6_addr *psfsrc, int delta);
145int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, int sfmode,
146 int sfcount, struct in6_addr *psfsrc, int delta);
147int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
148 struct inet6_dev *idev);
149
150
151#define IGMP6_UNSOLICITED_IVAL (10*HZ)
152#define MLD_QRV_DEFAULT 2
153
154#define MLD_V1_SEEN(idev) ((idev)->mc_v1_seen && \
155 time_before(jiffies, (idev)->mc_v1_seen))
156
157#define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
158#define MLDV2_EXP(thresh, nbmant, nbexp, value) \
159 ((value) < (thresh) ? (value) : \
160 ((MLDV2_MASK(value, nbmant) | (1<<(nbmant+nbexp))) << \
161 (MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp))))
162
163#define MLDV2_QQIC(value) MLDV2_EXP(0x80, 4, 3, value)
164#define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value)
165
166#define IPV6_MLD_MAX_MSF 10
167
168int sysctl_mld_max_msf = IPV6_MLD_MAX_MSF;
169
170
171
172
173
174int ipv6_sock_mc_join(struct sock *sk, int ifindex, struct in6_addr *addr)
175{
176 struct net_device *dev = NULL;
177 struct ipv6_mc_socklist *mc_lst;
178 struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
179 int err;
180
181 if (!(ipv6_addr_type(addr) & IPV6_ADDR_MULTICAST))
182 return -EINVAL;
183
184 mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
185
186 if (mc_lst == NULL)
187 return -ENOMEM;
188
189 mc_lst->next = NULL;
190 memcpy(&mc_lst->addr, addr, sizeof(struct in6_addr));
191
192 if (ifindex == 0) {
193 struct rt6_info *rt;
194 rt = rt6_lookup(addr, NULL, 0, 0);
195 if (rt) {
196 dev = rt->rt6i_dev;
197 dev_hold(dev);
198 dst_release(&rt->u.dst);
199 }
200 } else
201 dev = dev_get_by_index(ifindex);
202
203 if (dev == NULL) {
204 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
205 return -ENODEV;
206 }
207
208 mc_lst->ifindex = dev->ifindex;
209 mc_lst->sfmode = MCAST_EXCLUDE;
210 mc_lst->sflist = 0;
211
212
213
214
215
216 err = ipv6_dev_mc_inc(dev, addr);
217
218 if (err) {
219 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
220 dev_put(dev);
221 return err;
222 }
223
224 write_lock_bh(&ipv6_sk_mc_lock);
225 mc_lst->next = np->ipv6_mc_list;
226 np->ipv6_mc_list = mc_lst;
227 write_unlock_bh(&ipv6_sk_mc_lock);
228
229 dev_put(dev);
230
231 return 0;
232}
233
234
235
236
237int ipv6_sock_mc_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
238{
239 struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
240 struct ipv6_mc_socklist *mc_lst, **lnk;
241
242 write_lock_bh(&ipv6_sk_mc_lock);
243 for (lnk = &np->ipv6_mc_list; (mc_lst = *lnk) !=NULL ; lnk = &mc_lst->next) {
244 if (mc_lst->ifindex == ifindex &&
245 ipv6_addr_cmp(&mc_lst->addr, addr) == 0) {
246 struct net_device *dev;
247
248 *lnk = mc_lst->next;
249 write_unlock_bh(&ipv6_sk_mc_lock);
250
251 if ((dev = dev_get_by_index(ifindex)) != NULL) {
252 struct inet6_dev *idev = in6_dev_get(dev);
253
254 if (idev) {
255 (void) ip6_mc_leave_src(sk,mc_lst,idev);
256 in6_dev_put(idev);
257 }
258 ipv6_dev_mc_dec(dev, &mc_lst->addr);
259 dev_put(dev);
260 }
261 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
262 return 0;
263 }
264 }
265 write_unlock_bh(&ipv6_sk_mc_lock);
266
267 return -ENOENT;
268}
269
270struct inet6_dev *ip6_mc_find_dev(struct in6_addr *group, int ifindex)
271{
272 struct net_device *dev = 0;
273 struct inet6_dev *idev = 0;
274
275 if (ifindex == 0) {
276 struct rt6_info *rt;
277
278 rt = rt6_lookup(group, NULL, 0, 0);
279 if (rt) {
280 dev = rt->rt6i_dev;
281 dev_hold(dev);
282 dst_release(&rt->u.dst);
283 }
284 } else
285 dev = dev_get_by_index(ifindex);
286
287 if (!dev)
288 return 0;
289 idev = in6_dev_get(dev);
290 if (!idev) {
291 dev_put(dev);
292 return 0;
293 }
294 read_lock_bh(&idev->lock);
295 if (idev->dead) {
296 read_unlock_bh(&idev->lock);
297 in6_dev_put(idev);
298 dev_put(dev);
299 return 0;
300 }
301 return idev;
302}
303
304void ipv6_sock_mc_close(struct sock *sk)
305{
306 struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
307 struct ipv6_mc_socklist *mc_lst;
308
309 write_lock_bh(&ipv6_sk_mc_lock);
310 while ((mc_lst = np->ipv6_mc_list) != NULL) {
311 struct net_device *dev;
312
313 np->ipv6_mc_list = mc_lst->next;
314 write_unlock_bh(&ipv6_sk_mc_lock);
315
316 dev = dev_get_by_index(mc_lst->ifindex);
317 if (dev) {
318 struct inet6_dev *idev = in6_dev_get(dev);
319
320 if (idev) {
321 (void) ip6_mc_leave_src(sk, mc_lst, idev);
322 in6_dev_put(idev);
323 }
324 ipv6_dev_mc_dec(dev, &mc_lst->addr);
325 dev_put(dev);
326 }
327
328 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
329
330 write_lock_bh(&ipv6_sk_mc_lock);
331 }
332 write_unlock_bh(&ipv6_sk_mc_lock);
333}
334
335int ip6_mc_source(int add, int omode, struct sock *sk,
336 struct group_source_req *pgsr)
337{
338 struct in6_addr *source, *group;
339 struct ipv6_mc_socklist *pmc;
340 struct net_device *dev;
341 struct inet6_dev *idev;
342 struct ipv6_pinfo *inet6 = &sk->net_pinfo.af_inet6;
343 struct ip6_sf_socklist *psl;
344 int i, j, rv;
345 int err;
346
347 if (pgsr->gsr_group.ss_family != AF_INET6 ||
348 pgsr->gsr_source.ss_family != AF_INET6)
349 return -EINVAL;
350
351 source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
352 group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
353
354 if (!(ipv6_addr_type(group) & IPV6_ADDR_MULTICAST))
355 return -EINVAL;
356
357 idev = ip6_mc_find_dev(group, pgsr->gsr_interface);
358 if (!idev)
359 return -ENODEV;
360 dev = idev->dev;
361
362 err = -EADDRNOTAVAIL;
363
364 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
365 if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
366 continue;
367 if (ipv6_addr_cmp(&pmc->addr, group) == 0)
368 break;
369 }
370 if (!pmc)
371 goto done;
372
373 if (pmc->sflist) {
374 if (pmc->sfmode != omode)
375 goto done;
376 } else if (pmc->sfmode != omode) {
377
378 ip6_mc_add_src(idev, group, omode, 0, 0, 0);
379 ip6_mc_del_src(idev, group, pmc->sfmode, 0, 0, 0);
380 pmc->sfmode = omode;
381 }
382
383 psl = pmc->sflist;
384 if (!add) {
385 if (!psl)
386 goto done;
387 rv = !0;
388 for (i=0; i<psl->sl_count; i++) {
389 rv = memcmp(&psl->sl_addr[i], source,
390 sizeof(struct in6_addr));
391 if (rv == 0)
392 break;
393 }
394 if (rv)
395 goto done;
396
397
398 ip6_mc_del_src(idev, group, omode, 1, source, 1);
399
400 for (j=i+1; j<psl->sl_count; j++)
401 psl->sl_addr[j-1] = psl->sl_addr[j];
402 psl->sl_count--;
403 err = 0;
404 goto done;
405 }
406
407
408 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
409 err = -ENOBUFS;
410 goto done;
411 }
412 if (!psl || psl->sl_count == psl->sl_max) {
413 struct ip6_sf_socklist *newpsl;
414 int count = IP6_SFBLOCK;
415
416 if (psl)
417 count += psl->sl_max;
418 newpsl = (struct ip6_sf_socklist *)sock_kmalloc(sk,
419 IP6_SFLSIZE(count), GFP_ATOMIC);
420 if (!newpsl) {
421 err = -ENOBUFS;
422 goto done;
423 }
424 newpsl->sl_max = count;
425 newpsl->sl_count = count - IP6_SFBLOCK;
426 if (psl) {
427 for (i=0; i<psl->sl_count; i++)
428 newpsl->sl_addr[i] = psl->sl_addr[i];
429 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
430 }
431 pmc->sflist = psl = newpsl;
432 }
433 rv = 1;
434 for (i=0; i<psl->sl_count; i++) {
435 rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr));
436 if (rv == 0)
437 break;
438 }
439 if (rv == 0)
440 goto done;
441 for (j=psl->sl_count-1; j>=i; j--)
442 psl->sl_addr[j+1] = psl->sl_addr[j];
443 psl->sl_addr[i] = *source;
444 psl->sl_count++;
445 err = 0;
446
447 ip6_mc_add_src(idev, group, omode, 1, source, 1);
448done:
449 read_unlock_bh(&idev->lock);
450 in6_dev_put(idev);
451 dev_put(dev);
452 return err;
453}
454
455int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
456{
457 struct in6_addr *group;
458 struct ipv6_mc_socklist *pmc;
459 struct net_device *dev;
460 struct inet6_dev *idev;
461 struct ipv6_pinfo *inet6 = &sk->net_pinfo.af_inet6;
462 struct ip6_sf_socklist *newpsl, *psl;
463 int i, err;
464
465 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
466
467 if (!(ipv6_addr_type(group) & IPV6_ADDR_MULTICAST))
468 return -EINVAL;
469 if (gsf->gf_fmode != MCAST_INCLUDE &&
470 gsf->gf_fmode != MCAST_EXCLUDE)
471 return -EINVAL;
472
473 idev = ip6_mc_find_dev(group, gsf->gf_interface);
474
475 if (!idev)
476 return -ENODEV;
477 dev = idev->dev;
478 err = -EADDRNOTAVAIL;
479
480 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
481 if (pmc->ifindex != gsf->gf_interface)
482 continue;
483 if (ipv6_addr_cmp(&pmc->addr, group) == 0)
484 break;
485 }
486 if (!pmc)
487 goto done;
488 if (gsf->gf_numsrc) {
489 newpsl = (struct ip6_sf_socklist *)sock_kmalloc(sk,
490 IP6_SFLSIZE(gsf->gf_numsrc), GFP_ATOMIC);
491 if (!newpsl) {
492 err = -ENOBUFS;
493 goto done;
494 }
495 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
496 for (i=0; i<newpsl->sl_count; ++i) {
497 struct sockaddr_in6 *psin6;
498
499 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
500 newpsl->sl_addr[i] = psin6->sin6_addr;
501 }
502 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
503 newpsl->sl_count, newpsl->sl_addr, 0);
504 if (err) {
505 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
506 goto done;
507 }
508 } else
509 newpsl = 0;
510 psl = pmc->sflist;
511 if (psl) {
512 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
513 psl->sl_count, psl->sl_addr, 0);
514 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
515 } else
516 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, 0, 0);
517 pmc->sflist = newpsl;
518 pmc->sfmode = gsf->gf_fmode;
519done:
520 read_unlock_bh(&idev->lock);
521 in6_dev_put(idev);
522 dev_put(dev);
523 return err;
524}
525
526int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
527 struct group_filter *optval, int *optlen)
528{
529 int err, i, count, copycount;
530 struct in6_addr *group;
531 struct ipv6_mc_socklist *pmc;
532 struct inet6_dev *idev;
533 struct net_device *dev;
534 struct ipv6_pinfo *inet6 = &sk->net_pinfo.af_inet6;
535 struct ip6_sf_socklist *psl;
536
537 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
538
539 if (!(ipv6_addr_type(group) & IPV6_ADDR_MULTICAST))
540 return -EINVAL;
541
542 idev = ip6_mc_find_dev(group, gsf->gf_interface);
543
544 if (!idev)
545 return -ENODEV;
546
547 dev = idev->dev;
548
549 err = -EADDRNOTAVAIL;
550
551 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
552 if (pmc->ifindex != gsf->gf_interface)
553 continue;
554 if (ipv6_addr_cmp(group, &pmc->addr) == 0)
555 break;
556 }
557 if (!pmc)
558 goto done;
559 gsf->gf_fmode = pmc->sfmode;
560 psl = pmc->sflist;
561 count = psl ? psl->sl_count : 0;
562 read_unlock_bh(&idev->lock);
563 in6_dev_put(idev);
564 dev_put(dev);
565
566 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
567 gsf->gf_numsrc = count;
568 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
569 copy_to_user((void *)optval, gsf, GROUP_FILTER_SIZE(0))) {
570 return -EFAULT;
571 }
572 for (i=0; i<copycount; i++) {
573 struct sockaddr_in6 *psin6;
574 struct sockaddr_storage ss;
575
576 psin6 = (struct sockaddr_in6 *)&ss;
577 memset(&ss, 0, sizeof(ss));
578 psin6->sin6_family = AF_INET6;
579 psin6->sin6_addr = psl->sl_addr[i];
580 if (copy_to_user((void *)&optval->gf_slist[i], &ss, sizeof(ss)))
581 return -EFAULT;
582 }
583 return 0;
584done:
585 read_unlock_bh(&idev->lock);
586 in6_dev_put(idev);
587 dev_put(dev);
588 return err;
589}
590
591int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
592 struct in6_addr *src_addr)
593{
594 struct ipv6_pinfo *np = &sk->net_pinfo.af_inet6;
595 struct ipv6_mc_socklist *mc;
596 struct ip6_sf_socklist *psl;
597 int rv = 1;
598
599 read_lock(&ipv6_sk_mc_lock);
600 for (mc = np->ipv6_mc_list; mc; mc = mc->next) {
601 if (ipv6_addr_cmp(&mc->addr, mc_addr) == 0)
602 break;
603 }
604 if (!mc) {
605 read_unlock(&ipv6_sk_mc_lock);
606 return 1;
607 }
608 psl = mc->sflist;
609 if (!psl) {
610 rv = mc->sfmode == MCAST_EXCLUDE;
611 } else {
612 int i;
613
614 for (i=0; i<psl->sl_count; i++) {
615 if (ipv6_addr_cmp(&psl->sl_addr[i], src_addr) == 0)
616 break;
617 }
618 if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
619 rv = 0;
620 if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
621 rv = 0;
622 }
623 read_unlock(&ipv6_sk_mc_lock);
624
625 return rv;
626}
627
628static void ma_put(struct ifmcaddr6 *mc)
629{
630 if (atomic_dec_and_test(&mc->mca_refcnt)) {
631 in6_dev_put(mc->idev);
632 kfree(mc);
633 }
634}
635
636static void igmp6_group_added(struct ifmcaddr6 *mc)
637{
638 struct net_device *dev = mc->idev->dev;
639 char buf[MAX_ADDR_LEN];
640
641 spin_lock_bh(&mc->mca_lock);
642 if (!(mc->mca_flags&MAF_LOADED)) {
643 mc->mca_flags |= MAF_LOADED;
644 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
645 dev_mc_add(dev, buf, dev->addr_len, 0);
646 }
647 spin_unlock_bh(&mc->mca_lock);
648
649 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
650 return;
651
652 if (MLD_V1_SEEN(mc->idev)) {
653 igmp6_join_group(mc);
654 return;
655 }
656
657
658 mc->mca_crcount = mc->idev->mc_qrv;
659 mld_ifc_event(mc->idev);
660}
661
662static void igmp6_group_dropped(struct ifmcaddr6 *mc)
663{
664 struct net_device *dev = mc->idev->dev;
665 char buf[MAX_ADDR_LEN];
666
667 spin_lock_bh(&mc->mca_lock);
668 if (mc->mca_flags&MAF_LOADED) {
669 mc->mca_flags &= ~MAF_LOADED;
670 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
671 dev_mc_delete(dev, buf, dev->addr_len, 0);
672 }
673
674 if (mc->mca_flags & MAF_NOREPORT)
675 goto done;
676 spin_unlock_bh(&mc->mca_lock);
677
678 if (!mc->idev->dead)
679 igmp6_leave_group(mc);
680
681 spin_lock_bh(&mc->mca_lock);
682 if (del_timer(&mc->mca_timer))
683 atomic_dec(&mc->mca_refcnt);
684done:
685 ip6_mc_clear_src(mc);
686 spin_unlock_bh(&mc->mca_lock);
687}
688
689
690
691
692static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
693{
694 struct ifmcaddr6 *pmc;
695
696
697
698
699
700
701
702 pmc = (struct ifmcaddr6 *)kmalloc(sizeof(*pmc), GFP_ATOMIC);
703 if (!pmc)
704 return;
705 memset(pmc, 0, sizeof(*pmc));
706 spin_lock_bh(&im->mca_lock);
707 pmc->mca_lock = SPIN_LOCK_UNLOCKED;
708 pmc->idev = im->idev;
709 in6_dev_hold(idev);
710 pmc->mca_addr = im->mca_addr;
711 pmc->mca_crcount = idev->mc_qrv;
712 pmc->mca_sfmode = im->mca_sfmode;
713 if (pmc->mca_sfmode == MCAST_INCLUDE) {
714 struct ip6_sf_list *psf;
715
716 pmc->mca_tomb = im->mca_tomb;
717 pmc->mca_sources = im->mca_sources;
718 im->mca_tomb = im->mca_sources = 0;
719 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
720 psf->sf_crcount = pmc->mca_crcount;
721 }
722 spin_unlock_bh(&im->mca_lock);
723
724 write_lock_bh(&idev->mc_lock);
725 pmc->next = idev->mc_tomb;
726 idev->mc_tomb = pmc;
727 write_unlock_bh(&idev->mc_lock);
728}
729
730static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca)
731{
732 struct ifmcaddr6 *pmc, *pmc_prev;
733 struct ip6_sf_list *psf, *psf_next;
734
735 write_lock_bh(&idev->mc_lock);
736 pmc_prev = 0;
737 for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
738 if (ipv6_addr_cmp(&pmc->mca_addr, pmca) == 0)
739 break;
740 pmc_prev = pmc;
741 }
742 if (pmc) {
743 if (pmc_prev)
744 pmc_prev->next = pmc->next;
745 else
746 idev->mc_tomb = pmc->next;
747 }
748 write_unlock_bh(&idev->mc_lock);
749 if (pmc) {
750 for (psf=pmc->mca_tomb; psf; psf=psf_next) {
751 psf_next = psf->sf_next;
752 kfree(psf);
753 }
754 in6_dev_put(pmc->idev);
755 kfree(pmc);
756 }
757}
758
759static void mld_clear_delrec(struct inet6_dev *idev)
760{
761 struct ifmcaddr6 *pmc, *nextpmc;
762
763 write_lock_bh(&idev->mc_lock);
764 pmc = idev->mc_tomb;
765 idev->mc_tomb = 0;
766 write_unlock_bh(&idev->mc_lock);
767
768 for (; pmc; pmc = nextpmc) {
769 nextpmc = pmc->next;
770 ip6_mc_clear_src(pmc);
771 in6_dev_put(pmc->idev);
772 kfree(pmc);
773 }
774
775
776 read_lock_bh(&idev->lock);
777 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
778 struct ip6_sf_list *psf, *psf_next;
779
780 spin_lock_bh(&pmc->mca_lock);
781 psf = pmc->mca_tomb;
782 pmc->mca_tomb = 0;
783 spin_unlock_bh(&pmc->mca_lock);
784 for (; psf; psf=psf_next) {
785 psf_next = psf->sf_next;
786 kfree(psf);
787 }
788 }
789 read_unlock_bh(&idev->lock);
790}
791
792
793
794
795
796int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr)
797{
798 struct ifmcaddr6 *mc;
799 struct inet6_dev *idev;
800
801 idev = in6_dev_get(dev);
802
803 if (idev == NULL)
804 return -EINVAL;
805
806 write_lock_bh(&idev->lock);
807 if (idev->dead) {
808 write_unlock_bh(&idev->lock);
809 in6_dev_put(idev);
810 return -ENODEV;
811 }
812
813 for (mc = idev->mc_list; mc; mc = mc->next) {
814 if (ipv6_addr_cmp(&mc->mca_addr, addr) == 0) {
815 mc->mca_users++;
816 write_unlock_bh(&idev->lock);
817 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
818 0, 0);
819 in6_dev_put(idev);
820 return 0;
821 }
822 }
823
824
825
826
827
828 mc = kmalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
829
830 if (mc == NULL) {
831 write_unlock_bh(&idev->lock);
832 in6_dev_put(idev);
833 return -ENOMEM;
834 }
835
836 memset(mc, 0, sizeof(struct ifmcaddr6));
837 mc->mca_timer.function = igmp6_timer_handler;
838 mc->mca_timer.data = (unsigned long) mc;
839
840 memcpy(&mc->mca_addr, addr, sizeof(struct in6_addr));
841 mc->idev = idev;
842 mc->mca_users = 1;
843 atomic_set(&mc->mca_refcnt, 2);
844 mc->mca_lock = SPIN_LOCK_UNLOCKED;
845
846
847 mc->mca_sfmode = MCAST_EXCLUDE;
848 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
849
850 if (ipv6_addr_cmp(&mc->mca_addr, &all_nodes_addr) == 0 ||
851 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
852 mc->mca_flags |= MAF_NOREPORT;
853
854 mc->next = idev->mc_list;
855 idev->mc_list = mc;
856 write_unlock_bh(&idev->lock);
857
858 mld_del_delrec(idev, &mc->mca_addr);
859 igmp6_group_added(mc);
860 ma_put(mc);
861 return 0;
862}
863
864
865
866
867static int __ipv6_dev_mc_dec(struct net_device *dev, struct inet6_dev *idev, struct in6_addr *addr)
868{
869 struct ifmcaddr6 *ma, **map;
870
871 write_lock_bh(&idev->lock);
872 for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
873 if (ipv6_addr_cmp(&ma->mca_addr, addr) == 0) {
874 if (--ma->mca_users == 0) {
875 *map = ma->next;
876 write_unlock_bh(&idev->lock);
877
878 igmp6_group_dropped(ma);
879
880 ma_put(ma);
881 return 0;
882 }
883 write_unlock_bh(&idev->lock);
884 return 0;
885 }
886 }
887 write_unlock_bh(&idev->lock);
888
889 return -ENOENT;
890}
891
892int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr)
893{
894 struct inet6_dev *idev = in6_dev_get(dev);
895 int err;
896
897 if (!idev)
898 return -ENODEV;
899
900 err = __ipv6_dev_mc_dec(dev, idev, addr);
901
902 in6_dev_put(idev);
903
904 return err;
905}
906
907
908
909
910int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
911 struct in6_addr *src_addr)
912{
913 struct inet6_dev *idev;
914 struct ifmcaddr6 *mc;
915 int rv = 0;
916
917 idev = in6_dev_get(dev);
918 if (idev) {
919 read_lock_bh(&idev->lock);
920 for (mc = idev->mc_list; mc; mc=mc->next) {
921 if (ipv6_addr_cmp(&mc->mca_addr, group) == 0)
922 break;
923 }
924 if (mc) {
925 if (!ipv6_addr_any(src_addr)) {
926 struct ip6_sf_list *psf;
927
928 spin_lock_bh(&mc->mca_lock);
929 for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
930 if (ipv6_addr_cmp(&psf->sf_addr,
931 src_addr) == 0)
932 break;
933 }
934 if (psf)
935 rv = psf->sf_count[MCAST_INCLUDE] ||
936 psf->sf_count[MCAST_EXCLUDE] !=
937 mc->mca_sfcount[MCAST_EXCLUDE];
938 else
939 rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0;
940 spin_unlock_bh(&mc->mca_lock);
941 } else
942 rv = 1;
943 }
944 read_unlock_bh(&idev->lock);
945 in6_dev_put(idev);
946 }
947 return rv;
948}
949
950static void mld_gq_start_timer(struct inet6_dev *idev)
951{
952 int tv = net_random() % idev->mc_maxdelay;
953
954 idev->mc_gq_running = 1;
955 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
956 in6_dev_hold(idev);
957}
958
959static void mld_ifc_start_timer(struct inet6_dev *idev, int delay)
960{
961 int tv = net_random() % delay;
962
963 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
964 in6_dev_hold(idev);
965}
966
967
968
969
970
971static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
972{
973 unsigned long delay = resptime;
974
975
976 if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
977 IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
978 return;
979
980 if (del_timer(&ma->mca_timer)) {
981 atomic_dec(&ma->mca_refcnt);
982 delay = ma->mca_timer.expires - jiffies;
983 }
984
985 if (delay >= resptime) {
986 if (resptime)
987 delay = net_random() % resptime;
988 else
989 delay = 1;
990 }
991
992 ma->mca_timer.expires = jiffies + delay;
993 if (!mod_timer(&ma->mca_timer, jiffies + delay))
994 atomic_inc(&ma->mca_refcnt);
995 ma->mca_flags |= MAF_TIMER_RUNNING;
996 spin_unlock(&ma->mca_lock);
997}
998
999static void mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
1000 struct in6_addr *srcs)
1001{
1002 struct ip6_sf_list *psf;
1003 int i, scount;
1004
1005 scount = 0;
1006 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1007 if (scount == nsrcs)
1008 break;
1009 for (i=0; i<nsrcs; i++)
1010 if (ipv6_addr_cmp(&srcs[i], &psf->sf_addr) == 0) {
1011 psf->sf_gsresp = 1;
1012 scount++;
1013 break;
1014 }
1015 }
1016}
1017
1018int igmp6_event_query(struct sk_buff *skb)
1019{
1020 struct mld2_query *mlh2 = (struct mld2_query *) skb->h.raw;
1021 struct ifmcaddr6 *ma;
1022 struct in6_addr *group;
1023 unsigned long max_delay;
1024 struct inet6_dev *idev;
1025 struct icmp6hdr *hdr;
1026 int group_type;
1027 int mark = 0;
1028 int len;
1029
1030 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1031 return -EINVAL;
1032
1033 len = ntohs(skb->nh.ipv6h->payload_len);
1034
1035
1036 if (!(ipv6_addr_type(&skb->nh.ipv6h->saddr)&IPV6_ADDR_LINKLOCAL))
1037 return -EINVAL;
1038
1039 idev = in6_dev_get(skb->dev);
1040
1041 if (idev == NULL)
1042 return 0;
1043
1044 hdr = (struct icmp6hdr *) skb->h.raw;
1045 group = (struct in6_addr *) (hdr + 1);
1046 group_type = ipv6_addr_type(group);
1047
1048 if (group_type != IPV6_ADDR_ANY &&
1049 !(group_type&IPV6_ADDR_MULTICAST)) {
1050 in6_dev_put(idev);
1051 return -EINVAL;
1052 }
1053
1054 if (len == 24) {
1055 int switchback;
1056
1057
1058
1059 max_delay = (ntohs(hdr->icmp6_maxdelay)*HZ)/1000;
1060
1061 switchback = (idev->mc_qrv + 1) * max_delay;
1062 idev->mc_v1_seen = jiffies + switchback;
1063
1064
1065 idev->mc_ifc_count = 0;
1066 if (del_timer(&idev->mc_ifc_timer))
1067 __in6_dev_put(idev);
1068
1069 mld_clear_delrec(idev);
1070 } else if (len >= 28) {
1071 max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000;
1072 if (!max_delay)
1073 max_delay = 1;
1074 idev->mc_maxdelay = max_delay;
1075 if (mlh2->qrv)
1076 idev->mc_qrv = mlh2->qrv;
1077 if (group_type == IPV6_ADDR_ANY) {
1078 if (mlh2->nsrcs) {
1079 in6_dev_put(idev);
1080 return -EINVAL;
1081 }
1082 mld_gq_start_timer(idev);
1083 in6_dev_put(idev);
1084 return 0;
1085 }
1086
1087 mark = mlh2->nsrcs != 0;
1088 } else {
1089 in6_dev_put(idev);
1090 return -EINVAL;
1091 }
1092
1093 read_lock_bh(&idev->lock);
1094 if (group_type == IPV6_ADDR_ANY) {
1095 for (ma = idev->mc_list; ma; ma=ma->next) {
1096 spin_lock_bh(&ma->mca_lock);
1097 igmp6_group_queried(ma, max_delay);
1098 spin_unlock_bh(&ma->mca_lock);
1099 }
1100 } else {
1101 for (ma = idev->mc_list; ma; ma=ma->next) {
1102 if (group_type != IPV6_ADDR_ANY &&
1103 ipv6_addr_cmp(group, &ma->mca_addr) != 0)
1104 continue;
1105 spin_lock_bh(&ma->mca_lock);
1106 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1107
1108 if (!mark)
1109 ma->mca_flags &= ~MAF_GSQUERY;
1110 } else {
1111
1112 if (mark)
1113 ma->mca_flags |= MAF_GSQUERY;
1114 else
1115 ma->mca_flags &= ~MAF_GSQUERY;
1116 }
1117 if (ma->mca_flags & MAF_GSQUERY)
1118 mld_marksources(ma, ntohs(mlh2->nsrcs),
1119 mlh2->srcs);
1120 igmp6_group_queried(ma, max_delay);
1121 spin_unlock_bh(&ma->mca_lock);
1122 if (group_type != IPV6_ADDR_ANY)
1123 break;
1124 }
1125 }
1126 read_unlock_bh(&idev->lock);
1127 in6_dev_put(idev);
1128
1129 return 0;
1130}
1131
1132
1133int igmp6_event_report(struct sk_buff *skb)
1134{
1135 struct ifmcaddr6 *ma;
1136 struct in6_addr *addrp;
1137 struct inet6_dev *idev;
1138 struct icmp6hdr *hdr;
1139 int addr_type;
1140
1141
1142 if (skb->pkt_type == PACKET_LOOPBACK)
1143 return 0;
1144
1145 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1146 return -EINVAL;
1147
1148 hdr = (struct icmp6hdr*) skb->h.raw;
1149
1150
1151 addr_type = ipv6_addr_type(&skb->nh.ipv6h->saddr);
1152 if (addr_type != IPV6_ADDR_ANY &&
1153 !(addr_type&IPV6_ADDR_LINKLOCAL))
1154 return -EINVAL;
1155
1156 addrp = (struct in6_addr *) (hdr + 1);
1157
1158 idev = in6_dev_get(skb->dev);
1159 if (idev == NULL)
1160 return -ENODEV;
1161
1162
1163
1164
1165
1166 read_lock_bh(&idev->lock);
1167 for (ma = idev->mc_list; ma; ma=ma->next) {
1168 if (ipv6_addr_cmp(&ma->mca_addr, addrp) == 0) {
1169 spin_lock(&ma->mca_lock);
1170 if (del_timer(&ma->mca_timer))
1171 atomic_dec(&ma->mca_refcnt);
1172 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1173 spin_unlock(&ma->mca_lock);
1174 break;
1175 }
1176 }
1177 read_unlock_bh(&idev->lock);
1178 in6_dev_put(idev);
1179 return 0;
1180}
1181
1182static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1183 int gdeleted, int sdeleted)
1184{
1185 switch (type) {
1186 case MLD2_MODE_IS_INCLUDE:
1187 case MLD2_MODE_IS_EXCLUDE:
1188 if (gdeleted || sdeleted)
1189 return 0;
1190 return !((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp);
1191 case MLD2_CHANGE_TO_INCLUDE:
1192 if (gdeleted || sdeleted)
1193 return 0;
1194 return psf->sf_count[MCAST_INCLUDE] != 0;
1195 case MLD2_CHANGE_TO_EXCLUDE:
1196 if (gdeleted || sdeleted)
1197 return 0;
1198 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1199 psf->sf_count[MCAST_INCLUDE])
1200 return 0;
1201 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1202 psf->sf_count[MCAST_EXCLUDE];
1203 case MLD2_ALLOW_NEW_SOURCES:
1204 if (gdeleted || !psf->sf_crcount)
1205 return 0;
1206 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1207 case MLD2_BLOCK_OLD_SOURCES:
1208 if (pmc->mca_sfmode == MCAST_INCLUDE)
1209 return gdeleted || (psf->sf_crcount && sdeleted);
1210 return psf->sf_crcount && !gdeleted && !sdeleted;
1211 }
1212 return 0;
1213}
1214
1215static int
1216mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1217{
1218 struct ip6_sf_list *psf;
1219 int scount = 0;
1220
1221 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1222 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1223 continue;
1224 scount++;
1225 }
1226 return scount;
1227}
1228
1229static struct sk_buff *mld_newpack(struct net_device *dev, int size)
1230{
1231 struct sock *sk = igmp6_socket->sk;
1232 struct sk_buff *skb;
1233 struct mld2_report *pmr;
1234 struct in6_addr addr_buf;
1235 int err;
1236 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1237 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1238 IPV6_TLV_PADN, 0 };
1239
1240 skb = sock_alloc_send_skb(sk, size + dev->hard_header_len+15, 1, &err);
1241
1242 if (skb == 0)
1243 return 0;
1244
1245 skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
1246 if (dev->hard_header) {
1247 unsigned char ha[MAX_ADDR_LEN];
1248
1249 ndisc_mc_map(&mld2_all_mcr, ha, dev, 1);
1250 if (dev->hard_header(skb, dev, ETH_P_IPV6,ha,NULL,size) < 0) {
1251 kfree_skb(skb);
1252 return 0;
1253 }
1254 }
1255
1256 if (ipv6_get_lladdr(dev, &addr_buf)) {
1257
1258
1259
1260
1261 memset(&addr_buf, 0, sizeof(addr_buf));
1262 }
1263
1264 ip6_nd_hdr(sk, skb, dev, &addr_buf, &mld2_all_mcr, NEXTHDR_HOP, 0);
1265
1266 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1267
1268 pmr =(struct mld2_report *)skb_put(skb, sizeof(*pmr));
1269 skb->h.raw = (unsigned char *)pmr;
1270 pmr->type = ICMPV6_MLD2_REPORT;
1271 pmr->resv1 = 0;
1272 pmr->csum = 0;
1273 pmr->resv2 = 0;
1274 pmr->ngrec = 0;
1275 return skb;
1276}
1277
1278static void mld_sendpack(struct sk_buff *skb)
1279{
1280 struct ipv6hdr *pip6 = skb->nh.ipv6h;
1281 struct mld2_report *pmr = (struct mld2_report *)skb->h.raw;
1282 int payload_len, mldlen, err;
1283
1284 payload_len = skb->tail - (unsigned char *)skb->nh.ipv6h -
1285 sizeof(struct ipv6hdr);
1286 mldlen = skb->tail - skb->h.raw;
1287 pip6->payload_len = htons(payload_len);
1288
1289 pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
1290 IPPROTO_ICMPV6, csum_partial(skb->h.raw, mldlen, 0));
1291 err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev,
1292 dev_queue_xmit);
1293 if (!err)
1294 ICMP6_INC_STATS(Icmp6OutMsgs);
1295}
1296
1297static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
1298{
1299 return sizeof(struct mld2_grec) + 4*mld_scount(pmc,type,gdel,sdel);
1300}
1301
1302static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1303 int type, struct mld2_grec **ppgr)
1304{
1305 struct net_device *dev = pmc->idev->dev;
1306 struct mld2_report *pmr;
1307 struct mld2_grec *pgr;
1308
1309 if (!skb)
1310 skb = mld_newpack(dev, dev->mtu);
1311 if (!skb)
1312 return 0;
1313 pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
1314 pgr->grec_type = type;
1315 pgr->grec_auxwords = 0;
1316 pgr->grec_nsrcs = 0;
1317 pgr->grec_mca = pmc->mca_addr;
1318 pmr = (struct mld2_report *)skb->h.raw;
1319 pmr->ngrec = htons(ntohs(pmr->ngrec)+1);
1320 *ppgr = pgr;
1321 return skb;
1322}
1323
1324#define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
1325 skb_tailroom(skb)) : 0)
1326
1327static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1328 int type, int gdeleted, int sdeleted)
1329{
1330 struct net_device *dev = pmc->idev->dev;
1331 struct mld2_report *pmr;
1332 struct mld2_grec *pgr = 0;
1333 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
1334 int scount, first, isquery, truncate;
1335
1336 if (pmc->mca_flags & MAF_NOREPORT)
1337 return skb;
1338
1339 isquery = type == MLD2_MODE_IS_INCLUDE ||
1340 type == MLD2_MODE_IS_EXCLUDE;
1341 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1342 type == MLD2_CHANGE_TO_EXCLUDE;
1343
1344 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1345
1346 if (!*psf_list) {
1347 if (type == MLD2_ALLOW_NEW_SOURCES ||
1348 type == MLD2_BLOCK_OLD_SOURCES)
1349 return skb;
1350 if (pmc->mca_crcount || isquery) {
1351
1352
1353
1354 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)+
1355 sizeof(struct in6_addr)) {
1356 mld_sendpack(skb);
1357 skb = 0;
1358 }
1359 skb = add_grhead(skb, pmc, type, &pgr);
1360 }
1361 return skb;
1362 }
1363 pmr = skb ? (struct mld2_report *)skb->h.raw : 0;
1364
1365
1366 if (truncate) {
1367 if (pmr && pmr->ngrec &&
1368 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1369 if (skb)
1370 mld_sendpack(skb);
1371 skb = mld_newpack(dev, dev->mtu);
1372 }
1373 }
1374 first = 1;
1375 scount = 0;
1376 psf_prev = 0;
1377 for (psf=*psf_list; psf; psf=psf_next) {
1378 struct in6_addr *psrc;
1379
1380 psf_next = psf->sf_next;
1381
1382 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1383 psf_prev = psf;
1384 continue;
1385 }
1386
1387
1388 if (isquery)
1389 psf->sf_gsresp = 0;
1390
1391 if (AVAILABLE(skb) < sizeof(*psrc) +
1392 first*sizeof(struct mld2_grec)) {
1393 if (truncate && !first)
1394 break;
1395 if (pgr)
1396 pgr->grec_nsrcs = htons(scount);
1397 if (skb)
1398 mld_sendpack(skb);
1399 skb = mld_newpack(dev, dev->mtu);
1400 first = 1;
1401 scount = 0;
1402 }
1403 if (first) {
1404 skb = add_grhead(skb, pmc, type, &pgr);
1405 first = 0;
1406 }
1407 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1408 *psrc = psf->sf_addr;
1409 scount++;
1410 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1411 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1412 psf->sf_crcount--;
1413 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1414 if (psf_prev)
1415 psf_prev->sf_next = psf->sf_next;
1416 else
1417 *psf_list = psf->sf_next;
1418 kfree(psf);
1419 continue;
1420 }
1421 }
1422 psf_prev = psf;
1423 }
1424 if (pgr)
1425 pgr->grec_nsrcs = htons(scount);
1426
1427 if (isquery)
1428 pmc->mca_flags &= ~MAF_GSQUERY;
1429 return skb;
1430}
1431
1432static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1433{
1434 struct sk_buff *skb = 0;
1435 int type;
1436
1437 if (!pmc) {
1438 read_lock_bh(&idev->lock);
1439 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1440 if (pmc->mca_flags & MAF_NOREPORT)
1441 continue;
1442 spin_lock_bh(&pmc->mca_lock);
1443 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1444 type = MLD2_MODE_IS_EXCLUDE;
1445 else
1446 type = MLD2_MODE_IS_INCLUDE;
1447 skb = add_grec(skb, pmc, type, 0, 0);
1448 spin_unlock_bh(&pmc->mca_lock);
1449 }
1450 read_unlock_bh(&idev->lock);
1451 } else {
1452 spin_lock_bh(&pmc->mca_lock);
1453 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1454 type = MLD2_MODE_IS_EXCLUDE;
1455 else
1456 type = MLD2_MODE_IS_INCLUDE;
1457 skb = add_grec(skb, pmc, type, 0, 0);
1458 spin_unlock_bh(&pmc->mca_lock);
1459 }
1460 if (skb)
1461 mld_sendpack(skb);
1462}
1463
1464
1465
1466
1467static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1468{
1469 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1470
1471 psf_prev = 0;
1472 for (psf=*ppsf; psf; psf = psf_next) {
1473 psf_next = psf->sf_next;
1474 if (psf->sf_crcount == 0) {
1475 if (psf_prev)
1476 psf_prev->sf_next = psf->sf_next;
1477 else
1478 *ppsf = psf->sf_next;
1479 kfree(psf);
1480 } else
1481 psf_prev = psf;
1482 }
1483}
1484
1485static void mld_send_cr(struct inet6_dev *idev)
1486{
1487 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1488 struct sk_buff *skb = 0;
1489 int type, dtype;
1490
1491 read_lock_bh(&idev->lock);
1492 write_lock_bh(&idev->mc_lock);
1493
1494
1495 pmc_prev = 0;
1496 for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
1497 pmc_next = pmc->next;
1498 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1499 type = MLD2_BLOCK_OLD_SOURCES;
1500 dtype = MLD2_BLOCK_OLD_SOURCES;
1501 skb = add_grec(skb, pmc, type, 1, 0);
1502 skb = add_grec(skb, pmc, dtype, 1, 1);
1503 }
1504 if (pmc->mca_crcount) {
1505 pmc->mca_crcount--;
1506 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1507 type = MLD2_CHANGE_TO_INCLUDE;
1508 skb = add_grec(skb, pmc, type, 1, 0);
1509 }
1510 if (pmc->mca_crcount == 0) {
1511 mld_clear_zeros(&pmc->mca_tomb);
1512 mld_clear_zeros(&pmc->mca_sources);
1513 }
1514 }
1515 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1516 !pmc->mca_sources) {
1517 if (pmc_prev)
1518 pmc_prev->next = pmc_next;
1519 else
1520 idev->mc_tomb = pmc_next;
1521 in6_dev_put(pmc->idev);
1522 kfree(pmc);
1523 } else
1524 pmc_prev = pmc;
1525 }
1526 write_unlock_bh(&idev->mc_lock);
1527
1528
1529 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1530 spin_lock_bh(&pmc->mca_lock);
1531 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1532 type = MLD2_BLOCK_OLD_SOURCES;
1533 dtype = MLD2_ALLOW_NEW_SOURCES;
1534 } else {
1535 type = MLD2_ALLOW_NEW_SOURCES;
1536 dtype = MLD2_BLOCK_OLD_SOURCES;
1537 }
1538 skb = add_grec(skb, pmc, type, 0, 0);
1539 skb = add_grec(skb, pmc, dtype, 0, 1);
1540
1541
1542 if (pmc->mca_crcount) {
1543 pmc->mca_crcount--;
1544 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1545 type = MLD2_CHANGE_TO_EXCLUDE;
1546 else
1547 type = MLD2_CHANGE_TO_INCLUDE;
1548 skb = add_grec(skb, pmc, type, 0, 0);
1549 }
1550 spin_unlock_bh(&pmc->mca_lock);
1551 }
1552 read_unlock_bh(&idev->lock);
1553 if (!skb)
1554 return;
1555 (void) mld_sendpack(skb);
1556}
1557
1558void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1559{
1560 struct sock *sk = igmp6_socket->sk;
1561 struct sk_buff *skb;
1562 struct icmp6hdr *hdr;
1563 struct in6_addr *snd_addr;
1564 struct in6_addr *addrp;
1565 struct in6_addr addr_buf;
1566 struct in6_addr all_routers;
1567 int err, len, payload_len, full_len;
1568 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1569 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1570 IPV6_TLV_PADN, 0 };
1571
1572 snd_addr = addr;
1573 if (type == ICMPV6_MGM_REDUCTION) {
1574 snd_addr = &all_routers;
1575 ipv6_addr_all_routers(&all_routers);
1576 }
1577
1578 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1579 payload_len = len + sizeof(ra);
1580 full_len = sizeof(struct ipv6hdr) + payload_len;
1581
1582 skb = sock_alloc_send_skb(sk, dev->hard_header_len + full_len + 15, 1, &err);
1583
1584 if (skb == NULL)
1585 return;
1586
1587 skb_reserve(skb, (dev->hard_header_len + 15) & ~15);
1588 if (dev->hard_header) {
1589 unsigned char ha[MAX_ADDR_LEN];
1590 ndisc_mc_map(snd_addr, ha, dev, 1);
1591 if (dev->hard_header(skb, dev, ETH_P_IPV6, ha, NULL, full_len) < 0)
1592 goto out;
1593 }
1594
1595 if (ipv6_get_lladdr(dev, &addr_buf)) {
1596
1597
1598
1599
1600 memset(&addr_buf, 0, sizeof(addr_buf));
1601 }
1602
1603 ip6_nd_hdr(sk, skb, dev, &addr_buf, snd_addr, NEXTHDR_HOP, payload_len);
1604
1605 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1606
1607 hdr = (struct icmp6hdr *) skb_put(skb, sizeof(struct icmp6hdr));
1608 memset(hdr, 0, sizeof(struct icmp6hdr));
1609 hdr->icmp6_type = type;
1610
1611 addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr));
1612 ipv6_addr_copy(addrp, addr);
1613
1614 hdr->icmp6_cksum = csum_ipv6_magic(&addr_buf, snd_addr, len,
1615 IPPROTO_ICMPV6,
1616 csum_partial((__u8 *) hdr, len, 0));
1617
1618 err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev,
1619 dev_queue_xmit);
1620 if (!err) {
1621 if (type == ICMPV6_MGM_REDUCTION)
1622 ICMP6_INC_STATS(Icmp6OutGroupMembReductions);
1623 else
1624 ICMP6_INC_STATS(Icmp6OutGroupMembResponses);
1625 ICMP6_INC_STATS(Icmp6OutMsgs);
1626 }
1627
1628 return;
1629
1630out:
1631 kfree_skb(skb);
1632}
1633
1634static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
1635 struct in6_addr *psfsrc)
1636{
1637 struct ip6_sf_list *psf, *psf_prev;
1638 int rv = 0;
1639
1640 psf_prev = 0;
1641 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1642 if (ipv6_addr_cmp(&psf->sf_addr, psfsrc) == 0)
1643 break;
1644 psf_prev = psf;
1645 }
1646 if (!psf || psf->sf_count[sfmode] == 0) {
1647
1648 return -ESRCH;
1649 }
1650 psf->sf_count[sfmode]--;
1651 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
1652 struct inet6_dev *idev = pmc->idev;
1653
1654
1655 if (psf_prev)
1656 psf_prev->sf_next = psf->sf_next;
1657 else
1658 pmc->mca_sources = psf->sf_next;
1659 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
1660 !MLD_V1_SEEN(idev)) {
1661 psf->sf_crcount = idev->mc_qrv;
1662 psf->sf_next = pmc->mca_tomb;
1663 pmc->mca_tomb = psf;
1664 rv = 1;
1665 } else
1666 kfree(psf);
1667 }
1668 return rv;
1669}
1670
1671int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, int sfmode,
1672 int sfcount, struct in6_addr *psfsrc, int delta)
1673{
1674 struct ifmcaddr6 *pmc;
1675 int changerec = 0;
1676 int i, err;
1677
1678 if (!idev)
1679 return -ENODEV;
1680 read_lock_bh(&idev->lock);
1681 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1682 if (ipv6_addr_cmp(pmca, &pmc->mca_addr) == 0)
1683 break;
1684 }
1685 if (!pmc) {
1686
1687 read_unlock_bh(&idev->lock);
1688 return -ESRCH;
1689 }
1690 spin_lock_bh(&pmc->mca_lock);
1691 sf_markstate(pmc);
1692 if (!delta) {
1693 if (!pmc->mca_sfcount[sfmode]) {
1694 spin_unlock_bh(&pmc->mca_lock);
1695 read_unlock_bh(&idev->lock);
1696 return -EINVAL;
1697 }
1698 pmc->mca_sfcount[sfmode]--;
1699 }
1700 err = 0;
1701 for (i=0; i<sfcount; i++) {
1702 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
1703
1704 changerec |= rv > 0;
1705 if (!err && rv < 0)
1706 err = rv;
1707 }
1708 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
1709 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
1710 pmc->mca_sfcount[MCAST_INCLUDE]) {
1711 struct ip6_sf_list *psf;
1712
1713
1714 pmc->mca_sfmode = MCAST_INCLUDE;
1715 pmc->mca_crcount = idev->mc_qrv;
1716 idev->mc_ifc_count = pmc->mca_crcount;
1717 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
1718 psf->sf_crcount = 0;
1719 mld_ifc_event(pmc->idev);
1720 } else if (sf_setstate(pmc) || changerec)
1721 mld_ifc_event(pmc->idev);
1722 spin_unlock_bh(&pmc->mca_lock);
1723 read_unlock_bh(&idev->lock);
1724 return err;
1725}
1726
1727
1728
1729
1730static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
1731 struct in6_addr *psfsrc, int delta)
1732{
1733 struct ip6_sf_list *psf, *psf_prev;
1734
1735 psf_prev = 0;
1736 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1737 if (ipv6_addr_cmp(&psf->sf_addr, psfsrc) == 0)
1738 break;
1739 psf_prev = psf;
1740 }
1741 if (!psf) {
1742 psf = (struct ip6_sf_list *)kmalloc(sizeof(*psf), GFP_ATOMIC);
1743 if (!psf)
1744 return -ENOBUFS;
1745 memset(psf, 0, sizeof(*psf));
1746 psf->sf_addr = *psfsrc;
1747 if (psf_prev) {
1748 psf_prev->sf_next = psf;
1749 } else
1750 pmc->mca_sources = psf;
1751 }
1752 psf->sf_count[sfmode]++;
1753 return 0;
1754}
1755
1756static void sf_markstate(struct ifmcaddr6 *pmc)
1757{
1758 struct ip6_sf_list *psf;
1759 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1760
1761 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
1762 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1763 psf->sf_oldin = mca_xcount ==
1764 psf->sf_count[MCAST_EXCLUDE] &&
1765 !psf->sf_count[MCAST_INCLUDE];
1766 } else
1767 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
1768}
1769
1770static int sf_setstate(struct ifmcaddr6 *pmc)
1771{
1772 struct ip6_sf_list *psf;
1773 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1774 int qrv = pmc->idev->mc_qrv;
1775 int new_in, rv;
1776
1777 rv = 0;
1778 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1779 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1780 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
1781 !psf->sf_count[MCAST_INCLUDE];
1782 } else
1783 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
1784 if (new_in != psf->sf_oldin) {
1785 psf->sf_crcount = qrv;
1786 rv++;
1787 }
1788 }
1789 return rv;
1790}
1791
1792
1793
1794
1795int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, int sfmode,
1796 int sfcount, struct in6_addr *psfsrc, int delta)
1797{
1798 struct ifmcaddr6 *pmc;
1799 int isexclude;
1800 int i, err;
1801
1802 if (!idev)
1803 return -ENODEV;
1804 read_lock_bh(&idev->lock);
1805 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1806 if (ipv6_addr_cmp(pmca, &pmc->mca_addr) == 0)
1807 break;
1808 }
1809 if (!pmc) {
1810
1811 read_unlock_bh(&idev->lock);
1812 return -ESRCH;
1813 }
1814 spin_lock_bh(&pmc->mca_lock);
1815
1816 sf_markstate(pmc);
1817 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
1818 if (!delta)
1819 pmc->mca_sfcount[sfmode]++;
1820 err = 0;
1821 for (i=0; i<sfcount; i++) {
1822 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta);
1823 if (err)
1824 break;
1825 }
1826 if (err) {
1827 int j;
1828
1829 pmc->mca_sfcount[sfmode]--;
1830 for (j=0; j<i; j++)
1831 (void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
1832 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
1833 struct inet6_dev *idev = pmc->idev;
1834 struct ip6_sf_list *psf;
1835
1836
1837 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1838 pmc->mca_sfmode = MCAST_EXCLUDE;
1839 else if (pmc->mca_sfcount[MCAST_INCLUDE])
1840 pmc->mca_sfmode = MCAST_INCLUDE;
1841
1842
1843 pmc->mca_crcount = idev->mc_qrv;
1844 idev->mc_ifc_count = pmc->mca_crcount;
1845 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
1846 psf->sf_crcount = 0;
1847 mld_ifc_event(idev);
1848 } else if (sf_setstate(pmc))
1849 mld_ifc_event(idev);
1850 spin_unlock_bh(&pmc->mca_lock);
1851 read_unlock_bh(&idev->lock);
1852 return err;
1853}
1854
1855static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
1856{
1857 struct ip6_sf_list *psf, *nextpsf;
1858
1859 for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
1860 nextpsf = psf->sf_next;
1861 kfree(psf);
1862 }
1863 pmc->mca_tomb = 0;
1864 for (psf=pmc->mca_sources; psf; psf=nextpsf) {
1865 nextpsf = psf->sf_next;
1866 kfree(psf);
1867 }
1868 pmc->mca_sources = 0;
1869 pmc->mca_sfmode = MCAST_EXCLUDE;
1870 pmc->mca_sfcount[MCAST_EXCLUDE] = 0;
1871 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
1872}
1873
1874static void igmp6_join_group(struct ifmcaddr6 *ma)
1875{
1876 unsigned long delay;
1877
1878 if (ma->mca_flags & MAF_NOREPORT)
1879 return;
1880
1881 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
1882
1883 delay = net_random() % IGMP6_UNSOLICITED_IVAL;
1884
1885 spin_lock_bh(&ma->mca_lock);
1886 if (del_timer(&ma->mca_timer)) {
1887 atomic_dec(&ma->mca_refcnt);
1888 delay = ma->mca_timer.expires - jiffies;
1889 }
1890
1891 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1892 atomic_inc(&ma->mca_refcnt);
1893 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
1894 spin_unlock_bh(&ma->mca_lock);
1895}
1896
1897int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
1898 struct inet6_dev *idev)
1899{
1900 int err;
1901
1902 if (iml->sflist == 0) {
1903
1904 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, 0, 0);
1905 }
1906 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
1907 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
1908 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
1909 iml->sflist = 0;
1910 return err;
1911}
1912
1913static void igmp6_leave_group(struct ifmcaddr6 *ma)
1914{
1915 if (MLD_V1_SEEN(ma->idev)) {
1916 if (ma->mca_flags & MAF_LAST_REPORTER)
1917 igmp6_send(&ma->mca_addr, ma->idev->dev,
1918 ICMPV6_MGM_REDUCTION);
1919 } else {
1920 mld_add_delrec(ma->idev, ma);
1921 mld_ifc_event(ma->idev);
1922 }
1923}
1924
1925static void mld_gq_timer_expire(unsigned long data)
1926{
1927 struct inet6_dev *idev = (struct inet6_dev *)data;
1928
1929 idev->mc_gq_running = 0;
1930 mld_send_report(idev, 0);
1931 __in6_dev_put(idev);
1932}
1933
1934static void mld_ifc_timer_expire(unsigned long data)
1935{
1936 struct inet6_dev *idev = (struct inet6_dev *)data;
1937
1938 mld_send_cr(idev);
1939 if (idev->mc_ifc_count) {
1940 idev->mc_ifc_count--;
1941 if (idev->mc_ifc_count)
1942 mld_ifc_start_timer(idev, idev->mc_maxdelay);
1943 }
1944 __in6_dev_put(idev);
1945}
1946
1947static void mld_ifc_event(struct inet6_dev *idev)
1948{
1949 if (MLD_V1_SEEN(idev))
1950 return;
1951 idev->mc_ifc_count = idev->mc_qrv;
1952 mld_ifc_start_timer(idev, 1);
1953}
1954
1955
1956static void igmp6_timer_handler(unsigned long data)
1957{
1958 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
1959
1960 if (MLD_V1_SEEN(ma->idev))
1961 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
1962 else
1963 mld_send_report(ma->idev, ma);
1964
1965 spin_lock(&ma->mca_lock);
1966 ma->mca_flags |= MAF_LAST_REPORTER;
1967 ma->mca_flags &= ~MAF_TIMER_RUNNING;
1968 spin_unlock(&ma->mca_lock);
1969 ma_put(ma);
1970}
1971
1972
1973
1974void ipv6_mc_down(struct inet6_dev *idev)
1975{
1976 struct ifmcaddr6 *i;
1977
1978
1979
1980 read_lock_bh(&idev->lock);
1981 idev->mc_ifc_count = 0;
1982 if (del_timer(&idev->mc_ifc_timer))
1983 __in6_dev_put(idev);
1984 idev->mc_gq_running = 0;
1985 if (del_timer(&idev->mc_gq_timer))
1986 __in6_dev_put(idev);
1987
1988 for (i = idev->mc_list; i; i=i->next)
1989 igmp6_group_dropped(i);
1990 read_unlock_bh(&idev->lock);
1991
1992 mld_clear_delrec(idev);
1993}
1994
1995
1996
1997
1998void ipv6_mc_up(struct inet6_dev *idev)
1999{
2000 struct ifmcaddr6 *i;
2001
2002
2003
2004 read_lock_bh(&idev->lock);
2005 for (i = idev->mc_list; i; i=i->next)
2006 igmp6_group_added(i);
2007 read_unlock_bh(&idev->lock);
2008}
2009
2010
2011
2012void ipv6_mc_init_dev(struct inet6_dev *idev)
2013{
2014 struct in6_addr maddr;
2015
2016 write_lock_bh(&idev->lock);
2017 idev->mc_lock = RW_LOCK_UNLOCKED;
2018 idev->mc_gq_running = 0;
2019 init_timer(&idev->mc_gq_timer);
2020 idev->mc_gq_timer.data = (unsigned long) idev;
2021 idev->mc_gq_timer.function = &mld_gq_timer_expire;
2022 idev->mc_tomb = 0;
2023 idev->mc_ifc_count = 0;
2024 init_timer(&idev->mc_ifc_timer);
2025 idev->mc_ifc_timer.data = (unsigned long) idev;
2026 idev->mc_ifc_timer.function = &mld_ifc_timer_expire;
2027 idev->mc_qrv = MLD_QRV_DEFAULT;
2028 idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL;
2029 idev->mc_v1_seen = 0;
2030 write_unlock_bh(&idev->lock);
2031
2032
2033 ipv6_addr_all_nodes(&maddr);
2034 ipv6_dev_mc_inc(idev->dev, &maddr);
2035}
2036
2037
2038
2039
2040
2041void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2042{
2043 struct ifmcaddr6 *i;
2044 struct in6_addr maddr;
2045
2046
2047 ipv6_mc_down(idev);
2048
2049
2050 ipv6_addr_all_nodes(&maddr);
2051
2052
2053
2054
2055
2056 __ipv6_dev_mc_dec(idev->dev, idev, &maddr);
2057
2058 write_lock_bh(&idev->lock);
2059 while ((i = idev->mc_list) != NULL) {
2060 idev->mc_list = i->next;
2061 write_unlock_bh(&idev->lock);
2062
2063 igmp6_group_dropped(i);
2064 ma_put(i);
2065
2066 write_lock_bh(&idev->lock);
2067 }
2068 write_unlock_bh(&idev->lock);
2069}
2070
2071#ifdef CONFIG_PROC_FS
2072static int igmp6_read_proc(char *buffer, char **start, off_t offset,
2073 int length, int *eof, void *data)
2074{
2075 off_t pos=0, begin=0;
2076 struct ifmcaddr6 *im;
2077 int len=0;
2078 struct net_device *dev;
2079
2080 read_lock(&dev_base_lock);
2081 for (dev = dev_base; dev; dev = dev->next) {
2082 struct inet6_dev *idev;
2083
2084 if ((idev = in6_dev_get(dev)) == NULL)
2085 continue;
2086
2087 read_lock_bh(&idev->lock);
2088 for (im = idev->mc_list; im; im = im->next) {
2089 int i;
2090
2091 len += sprintf(buffer+len,"%-4d %-15s ", dev->ifindex, dev->name);
2092
2093 for (i=0; i<16; i++)
2094 len += sprintf(buffer+len, "%02x", im->mca_addr.s6_addr[i]);
2095
2096 len+=sprintf(buffer+len,
2097 " %5d %08X %ld\n",
2098 im->mca_users,
2099 im->mca_flags,
2100 (im->mca_flags&MAF_TIMER_RUNNING) ? im->mca_timer.expires-jiffies : 0);
2101
2102 pos=begin+len;
2103 if (pos < offset) {
2104 len=0;
2105 begin=pos;
2106 }
2107 if (pos > offset+length) {
2108 read_unlock_bh(&idev->lock);
2109 in6_dev_put(idev);
2110 goto done;
2111 }
2112 }
2113 read_unlock_bh(&idev->lock);
2114 in6_dev_put(idev);
2115 }
2116 *eof = 1;
2117
2118done:
2119 read_unlock(&dev_base_lock);
2120
2121 *start=buffer+(offset-begin);
2122 len-=(offset-begin);
2123 if(len>length)
2124 len=length;
2125 if (len<0)
2126 len=0;
2127 return len;
2128}
2129
2130static int ip6_mcf_read_proc(char *buffer, char **start, off_t offset,
2131 int length, int *eof, void *data)
2132{
2133 off_t pos=0, begin=0;
2134 int len=0;
2135 int first=1;
2136 struct net_device *dev;
2137
2138 read_lock(&dev_base_lock);
2139 for (dev=dev_base; dev; dev=dev->next) {
2140 struct inet6_dev *idev = in6_dev_get(dev);
2141 struct ifmcaddr6 *imc;
2142
2143 if (idev == NULL)
2144 continue;
2145
2146 read_lock_bh(&idev->lock);
2147
2148 for (imc=idev->mc_list; imc; imc=imc->next) {
2149 struct ip6_sf_list *psf;
2150 unsigned long i;
2151
2152 spin_lock_bh(&imc->mca_lock);
2153 for (psf=imc->mca_sources; psf; psf=psf->sf_next) {
2154 if (first) {
2155 len += sprintf(buffer+len, "%3s %6s "
2156 "%32s %32s %6s %6s\n", "Idx",
2157 "Device", "Multicast Address",
2158 "Source Address", "INC", "EXC");
2159 first = 0;
2160 }
2161 len += sprintf(buffer+len,"%3d %6.6s ",
2162 dev->ifindex, dev->name);
2163
2164 for (i=0; i<16; i++)
2165 len += sprintf(buffer+len, "%02x",
2166 imc->mca_addr.s6_addr[i]);
2167 buffer[len++] = ' ';
2168 for (i=0; i<16; i++)
2169 len += sprintf(buffer+len, "%02x",
2170 psf->sf_addr.s6_addr[i]);
2171 len += sprintf(buffer+len, " %6lu %6lu\n",
2172 psf->sf_count[MCAST_INCLUDE],
2173 psf->sf_count[MCAST_EXCLUDE]);
2174 pos = begin+len;
2175 if (pos < offset) {
2176 len=0;
2177 begin=pos;
2178 }
2179 if (pos > offset+length) {
2180 spin_unlock_bh(&imc->mca_lock);
2181 read_unlock_bh(&idev->lock);
2182 in6_dev_put(idev);
2183 goto done;
2184 }
2185 }
2186 spin_unlock_bh(&imc->mca_lock);
2187 }
2188 read_unlock_bh(&idev->lock);
2189 in6_dev_put(idev);
2190 }
2191 *eof = 1;
2192
2193done:
2194 read_unlock(&dev_base_lock);
2195
2196 *start=buffer+(offset-begin);
2197 len-=(offset-begin);
2198 if(len>length)
2199 len=length;
2200 if (len<0)
2201 len=0;
2202 return len;
2203}
2204#endif
2205
2206int __init igmp6_init(struct net_proto_family *ops)
2207{
2208 struct sock *sk;
2209 int err;
2210
2211 igmp6_socket = sock_alloc();
2212 if (igmp6_socket == NULL) {
2213 printk(KERN_ERR
2214 "Failed to create the IGMP6 control socket.\n");
2215 return -1;
2216 }
2217 igmp6_socket->inode->i_uid = 0;
2218 igmp6_socket->inode->i_gid = 0;
2219 igmp6_socket->type = SOCK_RAW;
2220
2221 if((err = ops->create(igmp6_socket, IPPROTO_ICMPV6)) < 0) {
2222 printk(KERN_DEBUG
2223 "Failed to initialize the IGMP6 control socket (err %d).\n",
2224 err);
2225 sock_release(igmp6_socket);
2226 igmp6_socket = NULL;
2227 return err;
2228 }
2229
2230 sk = igmp6_socket->sk;
2231 sk->allocation = GFP_ATOMIC;
2232 sk->prot->unhash(sk);
2233
2234 sk->net_pinfo.af_inet6.hop_limit = 1;
2235#ifdef CONFIG_PROC_FS
2236 create_proc_read_entry("net/igmp6", 0, 0, igmp6_read_proc, NULL);
2237 create_proc_read_entry("net/mcfilter6", 0, 0, ip6_mcf_read_proc, NULL);
2238#endif
2239
2240 return 0;
2241}
2242
2243void igmp6_cleanup(void)
2244{
2245 sock_release(igmp6_socket);
2246 igmp6_socket = NULL;
2247#ifdef CONFIG_PROC_FS
2248 remove_proc_entry("net/igmp6", 0);
2249#endif
2250}
2251
