2 * Multicast support for IPv6
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * $Id: mcast.c,v 1.40 2002/02/08 03:57:19 davem Exp $
10 * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
20 * yoshfuji : fix format of router-alert option
21 * YOSHIFUJI Hideaki @USAGI:
22 * Fixed source address for MLD message based on
23 * <draft-ietf-magma-mld-source-05.txt>.
24 * YOSHIFUJI Hideaki @USAGI:
25 * - Ignore Queries for invalid addresses.
26 * - MLD for link-local addresses.
27 * David L Stevens <dlstevens@us.ibm.com>:
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/jiffies.h>
39 #include <linux/times.h>
40 #include <linux/net.h>
42 #include <linux/in6.h>
43 #include <linux/netdevice.h>
44 #include <linux/if_arp.h>
45 #include <linux/route.h>
46 #include <linux/init.h>
47 #include <linux/proc_fs.h>
48 #include <linux/seq_file.h>
50 #include <linux/netfilter.h>
51 #include <linux/netfilter_ipv6.h>
57 #include <net/protocol.h>
58 #include <net/if_inet6.h>
59 #include <net/ndisc.h>
60 #include <net/addrconf.h>
61 #include <net/ip6_route.h>
63 #include <net/ip6_checksum.h>
65 /* Set to 3 to get tracing... */
69 #define MDBG(x) printk x
75 * These header formats should be in a separate include file, but icmpv6.h
76 * doesn't have in6_addr defined in all cases, there is no __u128, and no
77 * other files reference these.
82 /* Multicast Listener Discovery version 2 headers */
88 struct in6_addr grec_mca;
89 struct in6_addr grec_src[0];
98 struct mld2_grec grec[0];
108 #if defined(__LITTLE_ENDIAN_BITFIELD)
112 #elif defined(__BIG_ENDIAN_BITFIELD)
117 #error "Please fix <asm/byteorder.h>"
121 struct in6_addr srcs[0];
124 struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
126 /* Big mc list lock for all the sockets */
127 static rwlock_t ipv6_sk_mc_lock = RW_LOCK_UNLOCKED;
129 static struct socket *igmp6_socket;
131 int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr);
133 static void igmp6_join_group(struct ifmcaddr6 *ma);
134 static void igmp6_leave_group(struct ifmcaddr6 *ma);
135 static void igmp6_timer_handler(unsigned long data);
137 static void mld_gq_timer_expire(unsigned long data);
138 static void mld_ifc_timer_expire(unsigned long data);
139 static void mld_ifc_event(struct inet6_dev *idev);
140 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
141 static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *addr);
142 static void mld_clear_delrec(struct inet6_dev *idev);
143 static int sf_setstate(struct ifmcaddr6 *pmc);
144 static void sf_markstate(struct ifmcaddr6 *pmc);
145 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
146 int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, int sfmode,
147 int sfcount, struct in6_addr *psfsrc, int delta);
148 int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, int sfmode,
149 int sfcount, struct in6_addr *psfsrc, int delta);
150 int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
151 struct inet6_dev *idev);
154 #define IGMP6_UNSOLICITED_IVAL (10*HZ)
155 #define MLD_QRV_DEFAULT 2
157 #define MLD_V1_SEEN(idev) (ipv6_devconf.force_mld_version == 1 || \
158 (idev)->cnf.force_mld_version == 1 || \
159 ((idev)->mc_v1_seen && \
160 time_before(jiffies, (idev)->mc_v1_seen)))
162 #define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
163 #define MLDV2_EXP(thresh, nbmant, nbexp, value) \
164 ((value) < (thresh) ? (value) : \
165 ((MLDV2_MASK(value, nbmant) | (1<<(nbmant+nbexp))) << \
166 (MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp))))
168 #define MLDV2_QQIC(value) MLDV2_EXP(0x80, 4, 3, value)
169 #define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value)
171 #define IPV6_MLD_MAX_MSF 10
173 int sysctl_mld_max_msf = IPV6_MLD_MAX_MSF;
176 * socket join on multicast group
179 int ipv6_sock_mc_join(struct sock *sk, int ifindex, struct in6_addr *addr)
181 struct net_device *dev = NULL;
182 struct ipv6_mc_socklist *mc_lst;
183 struct ipv6_pinfo *np = inet6_sk(sk);
186 if (!ipv6_addr_is_multicast(addr))
189 mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
195 ipv6_addr_copy(&mc_lst->addr, addr);
199 rt = rt6_lookup(addr, NULL, 0, 0);
203 dst_release(&rt->u.dst);
206 dev = dev_get_by_index(ifindex);
209 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
213 mc_lst->ifindex = dev->ifindex;
214 mc_lst->sfmode = MCAST_EXCLUDE;
215 mc_lst->sflist = NULL;
218 * now add/increase the group membership on the device
221 err = ipv6_dev_mc_inc(dev, addr);
224 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
229 write_lock_bh(&ipv6_sk_mc_lock);
230 mc_lst->next = np->ipv6_mc_list;
231 np->ipv6_mc_list = mc_lst;
232 write_unlock_bh(&ipv6_sk_mc_lock);
240 * socket leave on multicast group
242 int ipv6_sock_mc_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
244 struct ipv6_pinfo *np = inet6_sk(sk);
245 struct ipv6_mc_socklist *mc_lst, **lnk;
247 write_lock_bh(&ipv6_sk_mc_lock);
248 for (lnk = &np->ipv6_mc_list; (mc_lst = *lnk) !=NULL ; lnk = &mc_lst->next) {
249 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
250 ipv6_addr_equal(&mc_lst->addr, addr)) {
251 struct net_device *dev;
254 write_unlock_bh(&ipv6_sk_mc_lock);
256 if ((dev = dev_get_by_index(mc_lst->ifindex)) != NULL) {
257 struct inet6_dev *idev = in6_dev_get(dev);
260 (void) ip6_mc_leave_src(sk,mc_lst,idev);
261 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
266 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
270 write_unlock_bh(&ipv6_sk_mc_lock);
275 struct inet6_dev *ip6_mc_find_dev(struct in6_addr *group, int ifindex)
277 struct net_device *dev = NULL;
278 struct inet6_dev *idev = NULL;
283 rt = rt6_lookup(group, NULL, 0, 0);
287 dst_release(&rt->u.dst);
290 dev = dev_get_by_index(ifindex);
294 idev = in6_dev_get(dev);
299 read_lock_bh(&idev->lock);
301 read_unlock_bh(&idev->lock);
309 void ipv6_sock_mc_close(struct sock *sk)
311 struct ipv6_pinfo *np = inet6_sk(sk);
312 struct ipv6_mc_socklist *mc_lst;
314 write_lock_bh(&ipv6_sk_mc_lock);
315 while ((mc_lst = np->ipv6_mc_list) != NULL) {
316 struct net_device *dev;
318 np->ipv6_mc_list = mc_lst->next;
319 write_unlock_bh(&ipv6_sk_mc_lock);
321 dev = dev_get_by_index(mc_lst->ifindex);
323 struct inet6_dev *idev = in6_dev_get(dev);
326 (void) ip6_mc_leave_src(sk, mc_lst, idev);
327 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
333 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
335 write_lock_bh(&ipv6_sk_mc_lock);
337 write_unlock_bh(&ipv6_sk_mc_lock);
340 int ip6_mc_source(int add, int omode, struct sock *sk,
341 struct group_source_req *pgsr)
343 struct in6_addr *source, *group;
344 struct ipv6_mc_socklist *pmc;
345 struct net_device *dev;
346 struct inet6_dev *idev;
347 struct ipv6_pinfo *inet6 = inet6_sk(sk);
348 struct ip6_sf_socklist *psl;
352 if (pgsr->gsr_group.ss_family != AF_INET6 ||
353 pgsr->gsr_source.ss_family != AF_INET6)
356 source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
357 group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
359 if (!ipv6_addr_is_multicast(group))
362 idev = ip6_mc_find_dev(group, pgsr->gsr_interface);
367 err = -EADDRNOTAVAIL;
369 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
370 if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
372 if (ipv6_addr_equal(&pmc->addr, group))
375 if (!pmc) /* must have a prior join */
377 /* if a source filter was set, must be the same mode as before */
379 if (pmc->sfmode != omode)
381 } else if (pmc->sfmode != omode) {
382 /* allow mode switches for empty-set filters */
383 ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
384 ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
393 for (i=0; i<psl->sl_count; i++) {
394 rv = memcmp(&psl->sl_addr[i], source,
395 sizeof(struct in6_addr));
399 if (rv) /* source not found */
402 /* update the interface filter */
403 ip6_mc_del_src(idev, group, omode, 1, source, 1);
405 for (j=i+1; j<psl->sl_count; j++)
406 psl->sl_addr[j-1] = psl->sl_addr[j];
411 /* else, add a new source to the filter */
413 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
417 if (!psl || psl->sl_count == psl->sl_max) {
418 struct ip6_sf_socklist *newpsl;
419 int count = IP6_SFBLOCK;
422 count += psl->sl_max;
423 newpsl = (struct ip6_sf_socklist *)sock_kmalloc(sk,
424 IP6_SFLSIZE(count), GFP_ATOMIC);
429 newpsl->sl_max = count;
430 newpsl->sl_count = count - IP6_SFBLOCK;
432 for (i=0; i<psl->sl_count; i++)
433 newpsl->sl_addr[i] = psl->sl_addr[i];
434 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
436 pmc->sflist = psl = newpsl;
438 rv = 1; /* > 0 for insert logic below if sl_count is 0 */
439 for (i=0; i<psl->sl_count; i++) {
440 rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr));
444 if (rv == 0) /* address already there is an error */
446 for (j=psl->sl_count-1; j>=i; j--)
447 psl->sl_addr[j+1] = psl->sl_addr[j];
448 psl->sl_addr[i] = *source;
451 /* update the interface list */
452 ip6_mc_add_src(idev, group, omode, 1, source, 1);
454 read_unlock_bh(&idev->lock);
460 int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
462 struct in6_addr *group;
463 struct ipv6_mc_socklist *pmc;
464 struct net_device *dev;
465 struct inet6_dev *idev;
466 struct ipv6_pinfo *inet6 = inet6_sk(sk);
467 struct ip6_sf_socklist *newpsl, *psl;
470 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
472 if (!ipv6_addr_is_multicast(group))
474 if (gsf->gf_fmode != MCAST_INCLUDE &&
475 gsf->gf_fmode != MCAST_EXCLUDE)
478 idev = ip6_mc_find_dev(group, gsf->gf_interface);
483 err = -EADDRNOTAVAIL;
485 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
486 if (pmc->ifindex != gsf->gf_interface)
488 if (ipv6_addr_equal(&pmc->addr, group))
491 if (!pmc) /* must have a prior join */
493 if (gsf->gf_numsrc) {
494 newpsl = (struct ip6_sf_socklist *)sock_kmalloc(sk,
495 IP6_SFLSIZE(gsf->gf_numsrc), GFP_ATOMIC);
500 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
501 for (i=0; i<newpsl->sl_count; ++i) {
502 struct sockaddr_in6 *psin6;
504 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
505 newpsl->sl_addr[i] = psin6->sin6_addr;
507 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
508 newpsl->sl_count, newpsl->sl_addr, 0);
510 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
517 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
518 psl->sl_count, psl->sl_addr, 0);
519 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
521 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
522 pmc->sflist = newpsl;
523 pmc->sfmode = gsf->gf_fmode;
525 read_unlock_bh(&idev->lock);
531 int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
532 struct group_filter __user *optval, int __user *optlen)
534 int err, i, count, copycount;
535 struct in6_addr *group;
536 struct ipv6_mc_socklist *pmc;
537 struct inet6_dev *idev;
538 struct net_device *dev;
539 struct ipv6_pinfo *inet6 = inet6_sk(sk);
540 struct ip6_sf_socklist *psl;
542 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
544 if (!ipv6_addr_is_multicast(group))
547 idev = ip6_mc_find_dev(group, gsf->gf_interface);
554 err = -EADDRNOTAVAIL;
556 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
557 if (pmc->ifindex != gsf->gf_interface)
559 if (ipv6_addr_equal(group, &pmc->addr))
562 if (!pmc) /* must have a prior join */
564 gsf->gf_fmode = pmc->sfmode;
566 count = psl ? psl->sl_count : 0;
567 read_unlock_bh(&idev->lock);
571 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
572 gsf->gf_numsrc = count;
573 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
574 copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
577 for (i=0; i<copycount; i++) {
578 struct sockaddr_in6 *psin6;
579 struct sockaddr_storage ss;
581 psin6 = (struct sockaddr_in6 *)&ss;
582 memset(&ss, 0, sizeof(ss));
583 psin6->sin6_family = AF_INET6;
584 psin6->sin6_addr = psl->sl_addr[i];
585 if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
590 read_unlock_bh(&idev->lock);
596 int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
597 struct in6_addr *src_addr)
599 struct ipv6_pinfo *np = inet6_sk(sk);
600 struct ipv6_mc_socklist *mc;
601 struct ip6_sf_socklist *psl;
604 read_lock(&ipv6_sk_mc_lock);
605 for (mc = np->ipv6_mc_list; mc; mc = mc->next) {
606 if (ipv6_addr_equal(&mc->addr, mc_addr))
610 read_unlock(&ipv6_sk_mc_lock);
615 rv = mc->sfmode == MCAST_EXCLUDE;
619 for (i=0; i<psl->sl_count; i++) {
620 if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
623 if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
625 if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
628 read_unlock(&ipv6_sk_mc_lock);
633 static void ma_put(struct ifmcaddr6 *mc)
635 if (atomic_dec_and_test(&mc->mca_refcnt)) {
636 in6_dev_put(mc->idev);
641 static void igmp6_group_added(struct ifmcaddr6 *mc)
643 struct net_device *dev = mc->idev->dev;
644 char buf[MAX_ADDR_LEN];
646 spin_lock_bh(&mc->mca_lock);
647 if (!(mc->mca_flags&MAF_LOADED)) {
648 mc->mca_flags |= MAF_LOADED;
649 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
650 dev_mc_add(dev, buf, dev->addr_len, 0);
652 spin_unlock_bh(&mc->mca_lock);
654 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
657 if (MLD_V1_SEEN(mc->idev)) {
658 igmp6_join_group(mc);
663 mc->mca_crcount = mc->idev->mc_qrv;
664 mld_ifc_event(mc->idev);
667 static void igmp6_group_dropped(struct ifmcaddr6 *mc)
669 struct net_device *dev = mc->idev->dev;
670 char buf[MAX_ADDR_LEN];
672 spin_lock_bh(&mc->mca_lock);
673 if (mc->mca_flags&MAF_LOADED) {
674 mc->mca_flags &= ~MAF_LOADED;
675 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
676 dev_mc_delete(dev, buf, dev->addr_len, 0);
679 if (mc->mca_flags & MAF_NOREPORT)
681 spin_unlock_bh(&mc->mca_lock);
684 igmp6_leave_group(mc);
686 spin_lock_bh(&mc->mca_lock);
687 if (del_timer(&mc->mca_timer))
688 atomic_dec(&mc->mca_refcnt);
690 ip6_mc_clear_src(mc);
691 spin_unlock_bh(&mc->mca_lock);
695 * deleted ifmcaddr6 manipulation
697 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
699 struct ifmcaddr6 *pmc;
701 /* this is an "ifmcaddr6" for convenience; only the fields below
702 * are actually used. In particular, the refcnt and users are not
703 * used for management of the delete list. Using the same structure
704 * for deleted items allows change reports to use common code with
705 * non-deleted or query-response MCA's.
707 pmc = (struct ifmcaddr6 *)kmalloc(sizeof(*pmc), GFP_ATOMIC);
710 memset(pmc, 0, sizeof(*pmc));
711 spin_lock_bh(&im->mca_lock);
712 spin_lock_init(&pmc->mca_lock);
713 pmc->idev = im->idev;
715 pmc->mca_addr = im->mca_addr;
716 pmc->mca_crcount = idev->mc_qrv;
717 pmc->mca_sfmode = im->mca_sfmode;
718 if (pmc->mca_sfmode == MCAST_INCLUDE) {
719 struct ip6_sf_list *psf;
721 pmc->mca_tomb = im->mca_tomb;
722 pmc->mca_sources = im->mca_sources;
723 im->mca_tomb = im->mca_sources = NULL;
724 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
725 psf->sf_crcount = pmc->mca_crcount;
727 spin_unlock_bh(&im->mca_lock);
729 write_lock_bh(&idev->mc_lock);
730 pmc->next = idev->mc_tomb;
732 write_unlock_bh(&idev->mc_lock);
735 static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca)
737 struct ifmcaddr6 *pmc, *pmc_prev;
738 struct ip6_sf_list *psf, *psf_next;
740 write_lock_bh(&idev->mc_lock);
742 for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
743 if (ipv6_addr_equal(&pmc->mca_addr, pmca))
749 pmc_prev->next = pmc->next;
751 idev->mc_tomb = pmc->next;
753 write_unlock_bh(&idev->mc_lock);
755 for (psf=pmc->mca_tomb; psf; psf=psf_next) {
756 psf_next = psf->sf_next;
759 in6_dev_put(pmc->idev);
764 static void mld_clear_delrec(struct inet6_dev *idev)
766 struct ifmcaddr6 *pmc, *nextpmc;
768 write_lock_bh(&idev->mc_lock);
770 idev->mc_tomb = NULL;
771 write_unlock_bh(&idev->mc_lock);
773 for (; pmc; pmc = nextpmc) {
775 ip6_mc_clear_src(pmc);
776 in6_dev_put(pmc->idev);
780 /* clear dead sources, too */
781 read_lock_bh(&idev->lock);
782 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
783 struct ip6_sf_list *psf, *psf_next;
785 spin_lock_bh(&pmc->mca_lock);
787 pmc->mca_tomb = NULL;
788 spin_unlock_bh(&pmc->mca_lock);
789 for (; psf; psf=psf_next) {
790 psf_next = psf->sf_next;
794 read_unlock_bh(&idev->lock);
799 * device multicast group inc (add if not found)
801 int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr)
803 struct ifmcaddr6 *mc;
804 struct inet6_dev *idev;
806 idev = in6_dev_get(dev);
811 write_lock_bh(&idev->lock);
813 write_unlock_bh(&idev->lock);
818 for (mc = idev->mc_list; mc; mc = mc->next) {
819 if (ipv6_addr_equal(&mc->mca_addr, addr)) {
821 write_unlock_bh(&idev->lock);
822 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
830 * not found: create a new one.
833 mc = kmalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
836 write_unlock_bh(&idev->lock);
841 memset(mc, 0, sizeof(struct ifmcaddr6));
842 init_timer(&mc->mca_timer);
843 mc->mca_timer.function = igmp6_timer_handler;
844 mc->mca_timer.data = (unsigned long) mc;
846 ipv6_addr_copy(&mc->mca_addr, addr);
849 /* mca_stamp should be updated upon changes */
850 mc->mca_cstamp = mc->mca_tstamp = jiffies;
851 atomic_set(&mc->mca_refcnt, 2);
852 spin_lock_init(&mc->mca_lock);
854 /* initial mode is (EX, empty) */
855 mc->mca_sfmode = MCAST_EXCLUDE;
856 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
858 if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
859 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
860 mc->mca_flags |= MAF_NOREPORT;
862 mc->next = idev->mc_list;
864 write_unlock_bh(&idev->lock);
866 mld_del_delrec(idev, &mc->mca_addr);
867 igmp6_group_added(mc);
873 * device multicast group del
875 int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr)
877 struct ifmcaddr6 *ma, **map;
879 write_lock_bh(&idev->lock);
880 for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
881 if (ipv6_addr_equal(&ma->mca_addr, addr)) {
882 if (--ma->mca_users == 0) {
884 write_unlock_bh(&idev->lock);
886 igmp6_group_dropped(ma);
891 write_unlock_bh(&idev->lock);
895 write_unlock_bh(&idev->lock);
900 int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr)
902 struct inet6_dev *idev = in6_dev_get(dev);
908 err = __ipv6_dev_mc_dec(idev, addr);
916 * identify MLD packets for MLD filter exceptions
918 int ipv6_is_mld(struct sk_buff *skb, int nexthdr)
920 struct icmp6hdr *pic;
922 if (nexthdr != IPPROTO_ICMPV6)
925 if (!pskb_may_pull(skb, sizeof(struct icmp6hdr)))
928 pic = (struct icmp6hdr *)skb->h.raw;
930 switch (pic->icmp6_type) {
931 case ICMPV6_MGM_QUERY:
932 case ICMPV6_MGM_REPORT:
933 case ICMPV6_MGM_REDUCTION:
934 case ICMPV6_MLD2_REPORT:
943 * check if the interface/address pair is valid
945 int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
946 struct in6_addr *src_addr)
948 struct inet6_dev *idev;
949 struct ifmcaddr6 *mc;
952 idev = in6_dev_get(dev);
954 read_lock_bh(&idev->lock);
955 for (mc = idev->mc_list; mc; mc=mc->next) {
956 if (ipv6_addr_equal(&mc->mca_addr, group))
960 if (src_addr && !ipv6_addr_any(src_addr)) {
961 struct ip6_sf_list *psf;
963 spin_lock_bh(&mc->mca_lock);
964 for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
965 if (ipv6_addr_equal(&psf->sf_addr, src_addr))
969 rv = psf->sf_count[MCAST_INCLUDE] ||
970 psf->sf_count[MCAST_EXCLUDE] !=
971 mc->mca_sfcount[MCAST_EXCLUDE];
973 rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0;
974 spin_unlock_bh(&mc->mca_lock);
976 rv = 1; /* don't filter unspecified source */
978 read_unlock_bh(&idev->lock);
984 static void mld_gq_start_timer(struct inet6_dev *idev)
986 int tv = net_random() % idev->mc_maxdelay;
988 idev->mc_gq_running = 1;
989 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
993 static void mld_ifc_start_timer(struct inet6_dev *idev, int delay)
995 int tv = net_random() % delay;
997 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
1002 * IGMP handling (alias multicast ICMPv6 messages)
1005 static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
1007 unsigned long delay = resptime;
1009 /* Do not start timer for these addresses */
1010 if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
1011 IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
1014 if (del_timer(&ma->mca_timer)) {
1015 atomic_dec(&ma->mca_refcnt);
1016 delay = ma->mca_timer.expires - jiffies;
1019 if (delay >= resptime) {
1021 delay = net_random() % resptime;
1025 ma->mca_timer.expires = jiffies + delay;
1026 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1027 atomic_inc(&ma->mca_refcnt);
1028 ma->mca_flags |= MAF_TIMER_RUNNING;
1031 static void mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
1032 struct in6_addr *srcs)
1034 struct ip6_sf_list *psf;
1038 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1039 if (scount == nsrcs)
1041 for (i=0; i<nsrcs; i++)
1042 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1050 int igmp6_event_query(struct sk_buff *skb)
1052 struct mld2_query *mlh2 = (struct mld2_query *) skb->h.raw;
1053 struct ifmcaddr6 *ma;
1054 struct in6_addr *group;
1055 unsigned long max_delay;
1056 struct inet6_dev *idev;
1057 struct icmp6hdr *hdr;
1062 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1065 /* compute payload length excluding extension headers */
1066 len = ntohs(skb->nh.ipv6h->payload_len) + sizeof(struct ipv6hdr);
1067 len -= (char *)skb->h.raw - (char *)skb->nh.ipv6h;
1069 /* Drop queries with not link local source */
1070 if (!(ipv6_addr_type(&skb->nh.ipv6h->saddr)&IPV6_ADDR_LINKLOCAL))
1073 idev = in6_dev_get(skb->dev);
1078 hdr = (struct icmp6hdr *) skb->h.raw;
1079 group = (struct in6_addr *) (hdr + 1);
1080 group_type = ipv6_addr_type(group);
1082 if (group_type != IPV6_ADDR_ANY &&
1083 !(group_type&IPV6_ADDR_MULTICAST)) {
1090 /* MLDv1 router present */
1092 /* Translate milliseconds to jiffies */
1093 max_delay = (ntohs(hdr->icmp6_maxdelay)*HZ)/1000;
1095 switchback = (idev->mc_qrv + 1) * max_delay;
1096 idev->mc_v1_seen = jiffies + switchback;
1098 /* cancel the interface change timer */
1099 idev->mc_ifc_count = 0;
1100 if (del_timer(&idev->mc_ifc_timer))
1101 __in6_dev_put(idev);
1102 /* clear deleted report items */
1103 mld_clear_delrec(idev);
1104 } else if (len >= 28) {
1105 max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000;
1108 idev->mc_maxdelay = max_delay;
1110 idev->mc_qrv = mlh2->qrv;
1111 if (group_type == IPV6_ADDR_ANY) { /* general query */
1114 return -EINVAL; /* no sources allowed */
1116 mld_gq_start_timer(idev);
1120 /* mark sources to include, if group & source-specific */
1121 mark = mlh2->nsrcs != 0;
1127 read_lock_bh(&idev->lock);
1128 if (group_type == IPV6_ADDR_ANY) {
1129 for (ma = idev->mc_list; ma; ma=ma->next) {
1130 spin_lock_bh(&ma->mca_lock);
1131 igmp6_group_queried(ma, max_delay);
1132 spin_unlock_bh(&ma->mca_lock);
1135 for (ma = idev->mc_list; ma; ma=ma->next) {
1136 if (group_type != IPV6_ADDR_ANY &&
1137 !ipv6_addr_equal(group, &ma->mca_addr))
1139 spin_lock_bh(&ma->mca_lock);
1140 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1141 /* gsquery <- gsquery && mark */
1143 ma->mca_flags &= ~MAF_GSQUERY;
1145 /* gsquery <- mark */
1147 ma->mca_flags |= MAF_GSQUERY;
1149 ma->mca_flags &= ~MAF_GSQUERY;
1151 if (ma->mca_flags & MAF_GSQUERY)
1152 mld_marksources(ma, ntohs(mlh2->nsrcs),
1154 igmp6_group_queried(ma, max_delay);
1155 spin_unlock_bh(&ma->mca_lock);
1156 if (group_type != IPV6_ADDR_ANY)
1160 read_unlock_bh(&idev->lock);
1167 int igmp6_event_report(struct sk_buff *skb)
1169 struct ifmcaddr6 *ma;
1170 struct in6_addr *addrp;
1171 struct inet6_dev *idev;
1172 struct icmp6hdr *hdr;
1175 /* Our own report looped back. Ignore it. */
1176 if (skb->pkt_type == PACKET_LOOPBACK)
1179 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1182 hdr = (struct icmp6hdr*) skb->h.raw;
1184 /* Drop reports with not link local source */
1185 addr_type = ipv6_addr_type(&skb->nh.ipv6h->saddr);
1186 if (addr_type != IPV6_ADDR_ANY &&
1187 !(addr_type&IPV6_ADDR_LINKLOCAL))
1190 addrp = (struct in6_addr *) (hdr + 1);
1192 idev = in6_dev_get(skb->dev);
1197 * Cancel the timer for this group
1200 read_lock_bh(&idev->lock);
1201 for (ma = idev->mc_list; ma; ma=ma->next) {
1202 if (ipv6_addr_equal(&ma->mca_addr, addrp)) {
1203 spin_lock(&ma->mca_lock);
1204 if (del_timer(&ma->mca_timer))
1205 atomic_dec(&ma->mca_refcnt);
1206 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1207 spin_unlock(&ma->mca_lock);
1211 read_unlock_bh(&idev->lock);
1216 static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1217 int gdeleted, int sdeleted)
1220 case MLD2_MODE_IS_INCLUDE:
1221 case MLD2_MODE_IS_EXCLUDE:
1222 if (gdeleted || sdeleted)
1224 return !((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp);
1225 case MLD2_CHANGE_TO_INCLUDE:
1226 if (gdeleted || sdeleted)
1228 return psf->sf_count[MCAST_INCLUDE] != 0;
1229 case MLD2_CHANGE_TO_EXCLUDE:
1230 if (gdeleted || sdeleted)
1232 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1233 psf->sf_count[MCAST_INCLUDE])
1235 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1236 psf->sf_count[MCAST_EXCLUDE];
1237 case MLD2_ALLOW_NEW_SOURCES:
1238 if (gdeleted || !psf->sf_crcount)
1240 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1241 case MLD2_BLOCK_OLD_SOURCES:
1242 if (pmc->mca_sfmode == MCAST_INCLUDE)
1243 return gdeleted || (psf->sf_crcount && sdeleted);
1244 return psf->sf_crcount && !gdeleted && !sdeleted;
1250 mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1252 struct ip6_sf_list *psf;
1255 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1256 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1263 static struct sk_buff *mld_newpack(struct net_device *dev, int size)
1265 struct sock *sk = igmp6_socket->sk;
1266 struct sk_buff *skb;
1267 struct mld2_report *pmr;
1268 struct in6_addr addr_buf;
1270 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1271 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1274 /* we assume size > sizeof(ra) here */
1275 skb = sock_alloc_send_skb(sk, size + LL_RESERVED_SPACE(dev), 1, &err);
1280 skb_reserve(skb, LL_RESERVED_SPACE(dev));
1281 if (dev->hard_header) {
1282 unsigned char ha[MAX_ADDR_LEN];
1284 ndisc_mc_map(&mld2_all_mcr, ha, dev, 1);
1285 if (dev->hard_header(skb, dev, ETH_P_IPV6,ha,NULL,size) < 0) {
1291 if (ipv6_get_lladdr(dev, &addr_buf)) {
1292 /* <draft-ietf-magma-mld-source-05.txt>:
1293 * use unspecified address as the source address
1294 * when a valid link-local address is not available.
1296 memset(&addr_buf, 0, sizeof(addr_buf));
1299 ip6_nd_hdr(sk, skb, dev, &addr_buf, &mld2_all_mcr, NEXTHDR_HOP, 0);
1301 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1303 pmr =(struct mld2_report *)skb_put(skb, sizeof(*pmr));
1304 skb->h.raw = (unsigned char *)pmr;
1305 pmr->type = ICMPV6_MLD2_REPORT;
1313 static void mld_sendpack(struct sk_buff *skb)
1315 struct ipv6hdr *pip6 = skb->nh.ipv6h;
1316 struct mld2_report *pmr = (struct mld2_report *)skb->h.raw;
1317 int payload_len, mldlen;
1318 struct inet6_dev *idev = in6_dev_get(skb->dev);
1321 IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
1322 payload_len = skb->tail - (unsigned char *)skb->nh.ipv6h -
1323 sizeof(struct ipv6hdr);
1324 mldlen = skb->tail - skb->h.raw;
1325 pip6->payload_len = htons(payload_len);
1327 pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
1328 IPPROTO_ICMPV6, csum_partial(skb->h.raw, mldlen, 0));
1329 err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev,
1332 ICMP6_INC_STATS(idev,ICMP6_MIB_OUTMSGS);
1333 IP6_INC_STATS(IPSTATS_MIB_OUTMCASTPKTS);
1335 IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
1337 if (likely(idev != NULL))
1341 static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
1343 return sizeof(struct mld2_grec) + 4*mld_scount(pmc,type,gdel,sdel);
1346 static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1347 int type, struct mld2_grec **ppgr)
1349 struct net_device *dev = pmc->idev->dev;
1350 struct mld2_report *pmr;
1351 struct mld2_grec *pgr;
1354 skb = mld_newpack(dev, dev->mtu);
1357 pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
1358 pgr->grec_type = type;
1359 pgr->grec_auxwords = 0;
1360 pgr->grec_nsrcs = 0;
1361 pgr->grec_mca = pmc->mca_addr; /* structure copy */
1362 pmr = (struct mld2_report *)skb->h.raw;
1363 pmr->ngrec = htons(ntohs(pmr->ngrec)+1);
1368 #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
1369 skb_tailroom(skb)) : 0)
1371 static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1372 int type, int gdeleted, int sdeleted)
1374 struct net_device *dev = pmc->idev->dev;
1375 struct mld2_report *pmr;
1376 struct mld2_grec *pgr = NULL;
1377 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
1378 int scount, first, isquery, truncate;
1380 if (pmc->mca_flags & MAF_NOREPORT)
1383 isquery = type == MLD2_MODE_IS_INCLUDE ||
1384 type == MLD2_MODE_IS_EXCLUDE;
1385 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1386 type == MLD2_CHANGE_TO_EXCLUDE;
1388 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1391 if (type == MLD2_ALLOW_NEW_SOURCES ||
1392 type == MLD2_BLOCK_OLD_SOURCES)
1394 if (pmc->mca_crcount || isquery) {
1395 /* make sure we have room for group header and at
1398 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)+
1399 sizeof(struct in6_addr)) {
1401 skb = NULL; /* add_grhead will get a new one */
1403 skb = add_grhead(skb, pmc, type, &pgr);
1407 pmr = skb ? (struct mld2_report *)skb->h.raw : NULL;
1409 /* EX and TO_EX get a fresh packet, if needed */
1411 if (pmr && pmr->ngrec &&
1412 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1415 skb = mld_newpack(dev, dev->mtu);
1421 for (psf=*psf_list; psf; psf=psf_next) {
1422 struct in6_addr *psrc;
1424 psf_next = psf->sf_next;
1426 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1431 /* clear marks on query responses */
1435 if (AVAILABLE(skb) < sizeof(*psrc) +
1436 first*sizeof(struct mld2_grec)) {
1437 if (truncate && !first)
1438 break; /* truncate these */
1440 pgr->grec_nsrcs = htons(scount);
1443 skb = mld_newpack(dev, dev->mtu);
1448 skb = add_grhead(skb, pmc, type, &pgr);
1451 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1452 *psrc = psf->sf_addr;
1454 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1455 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1457 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1459 psf_prev->sf_next = psf->sf_next;
1461 *psf_list = psf->sf_next;
1469 pgr->grec_nsrcs = htons(scount);
1472 pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
1476 static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1478 struct sk_buff *skb = NULL;
1482 read_lock_bh(&idev->lock);
1483 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1484 if (pmc->mca_flags & MAF_NOREPORT)
1486 spin_lock_bh(&pmc->mca_lock);
1487 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1488 type = MLD2_MODE_IS_EXCLUDE;
1490 type = MLD2_MODE_IS_INCLUDE;
1491 skb = add_grec(skb, pmc, type, 0, 0);
1492 spin_unlock_bh(&pmc->mca_lock);
1494 read_unlock_bh(&idev->lock);
1496 spin_lock_bh(&pmc->mca_lock);
1497 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1498 type = MLD2_MODE_IS_EXCLUDE;
1500 type = MLD2_MODE_IS_INCLUDE;
1501 skb = add_grec(skb, pmc, type, 0, 0);
1502 spin_unlock_bh(&pmc->mca_lock);
1509 * remove zero-count source records from a source filter list
1511 static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1513 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1516 for (psf=*ppsf; psf; psf = psf_next) {
1517 psf_next = psf->sf_next;
1518 if (psf->sf_crcount == 0) {
1520 psf_prev->sf_next = psf->sf_next;
1522 *ppsf = psf->sf_next;
1529 static void mld_send_cr(struct inet6_dev *idev)
1531 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1532 struct sk_buff *skb = NULL;
1535 read_lock_bh(&idev->lock);
1536 write_lock_bh(&idev->mc_lock);
1540 for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
1541 pmc_next = pmc->next;
1542 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1543 type = MLD2_BLOCK_OLD_SOURCES;
1544 dtype = MLD2_BLOCK_OLD_SOURCES;
1545 skb = add_grec(skb, pmc, type, 1, 0);
1546 skb = add_grec(skb, pmc, dtype, 1, 1);
1548 if (pmc->mca_crcount) {
1550 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1551 type = MLD2_CHANGE_TO_INCLUDE;
1552 skb = add_grec(skb, pmc, type, 1, 0);
1554 if (pmc->mca_crcount == 0) {
1555 mld_clear_zeros(&pmc->mca_tomb);
1556 mld_clear_zeros(&pmc->mca_sources);
1559 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1560 !pmc->mca_sources) {
1562 pmc_prev->next = pmc_next;
1564 idev->mc_tomb = pmc_next;
1565 in6_dev_put(pmc->idev);
1570 write_unlock_bh(&idev->mc_lock);
1573 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1574 spin_lock_bh(&pmc->mca_lock);
1575 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1576 type = MLD2_BLOCK_OLD_SOURCES;
1577 dtype = MLD2_ALLOW_NEW_SOURCES;
1579 type = MLD2_ALLOW_NEW_SOURCES;
1580 dtype = MLD2_BLOCK_OLD_SOURCES;
1582 skb = add_grec(skb, pmc, type, 0, 0);
1583 skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
1585 /* filter mode changes */
1586 if (pmc->mca_crcount) {
1588 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1589 type = MLD2_CHANGE_TO_EXCLUDE;
1591 type = MLD2_CHANGE_TO_INCLUDE;
1592 skb = add_grec(skb, pmc, type, 0, 0);
1594 spin_unlock_bh(&pmc->mca_lock);
1596 read_unlock_bh(&idev->lock);
1599 (void) mld_sendpack(skb);
1602 static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1604 struct sock *sk = igmp6_socket->sk;
1605 struct inet6_dev *idev;
1606 struct sk_buff *skb;
1607 struct icmp6hdr *hdr;
1608 struct in6_addr *snd_addr;
1609 struct in6_addr *addrp;
1610 struct in6_addr addr_buf;
1611 struct in6_addr all_routers;
1612 int err, len, payload_len, full_len;
1613 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1614 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1617 IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
1619 if (type == ICMPV6_MGM_REDUCTION) {
1620 snd_addr = &all_routers;
1621 ipv6_addr_all_routers(&all_routers);
1624 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1625 payload_len = len + sizeof(ra);
1626 full_len = sizeof(struct ipv6hdr) + payload_len;
1628 skb = sock_alloc_send_skb(sk, LL_RESERVED_SPACE(dev) + full_len, 1, &err);
1631 IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
1635 skb_reserve(skb, LL_RESERVED_SPACE(dev));
1636 if (dev->hard_header) {
1637 unsigned char ha[MAX_ADDR_LEN];
1638 ndisc_mc_map(snd_addr, ha, dev, 1);
1639 if (dev->hard_header(skb, dev, ETH_P_IPV6, ha, NULL, full_len) < 0)
1643 if (ipv6_get_lladdr(dev, &addr_buf)) {
1644 /* <draft-ietf-magma-mld-source-05.txt>:
1645 * use unspecified address as the source address
1646 * when a valid link-local address is not available.
1648 memset(&addr_buf, 0, sizeof(addr_buf));
1651 ip6_nd_hdr(sk, skb, dev, &addr_buf, snd_addr, NEXTHDR_HOP, payload_len);
1653 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1655 hdr = (struct icmp6hdr *) skb_put(skb, sizeof(struct icmp6hdr));
1656 memset(hdr, 0, sizeof(struct icmp6hdr));
1657 hdr->icmp6_type = type;
1659 addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr));
1660 ipv6_addr_copy(addrp, addr);
1662 hdr->icmp6_cksum = csum_ipv6_magic(&addr_buf, snd_addr, len,
1664 csum_partial((__u8 *) hdr, len, 0));
1666 idev = in6_dev_get(skb->dev);
1668 err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev,
1671 if (type == ICMPV6_MGM_REDUCTION)
1672 ICMP6_INC_STATS(idev, ICMP6_MIB_OUTGROUPMEMBREDUCTIONS);
1674 ICMP6_INC_STATS(idev, ICMP6_MIB_OUTGROUPMEMBRESPONSES);
1675 ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS);
1676 IP6_INC_STATS(IPSTATS_MIB_OUTMCASTPKTS);
1678 IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
1680 if (likely(idev != NULL))
1685 IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
1689 static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
1690 struct in6_addr *psfsrc)
1692 struct ip6_sf_list *psf, *psf_prev;
1696 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1697 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1701 if (!psf || psf->sf_count[sfmode] == 0) {
1702 /* source filter not found, or count wrong => bug */
1705 psf->sf_count[sfmode]--;
1706 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
1707 struct inet6_dev *idev = pmc->idev;
1709 /* no more filters for this source */
1711 psf_prev->sf_next = psf->sf_next;
1713 pmc->mca_sources = psf->sf_next;
1714 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
1715 !MLD_V1_SEEN(idev)) {
1716 psf->sf_crcount = idev->mc_qrv;
1717 psf->sf_next = pmc->mca_tomb;
1718 pmc->mca_tomb = psf;
1726 int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, int sfmode,
1727 int sfcount, struct in6_addr *psfsrc, int delta)
1729 struct ifmcaddr6 *pmc;
1735 read_lock_bh(&idev->lock);
1736 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1737 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
1741 /* MCA not found?? bug */
1742 read_unlock_bh(&idev->lock);
1745 spin_lock_bh(&pmc->mca_lock);
1748 if (!pmc->mca_sfcount[sfmode]) {
1749 spin_unlock_bh(&pmc->mca_lock);
1750 read_unlock_bh(&idev->lock);
1753 pmc->mca_sfcount[sfmode]--;
1756 for (i=0; i<sfcount; i++) {
1757 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
1759 changerec |= rv > 0;
1763 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
1764 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
1765 pmc->mca_sfcount[MCAST_INCLUDE]) {
1766 struct ip6_sf_list *psf;
1768 /* filter mode change */
1769 pmc->mca_sfmode = MCAST_INCLUDE;
1770 pmc->mca_crcount = idev->mc_qrv;
1771 idev->mc_ifc_count = pmc->mca_crcount;
1772 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
1773 psf->sf_crcount = 0;
1774 mld_ifc_event(pmc->idev);
1775 } else if (sf_setstate(pmc) || changerec)
1776 mld_ifc_event(pmc->idev);
1777 spin_unlock_bh(&pmc->mca_lock);
1778 read_unlock_bh(&idev->lock);
1783 * Add multicast single-source filter to the interface list
1785 static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
1786 struct in6_addr *psfsrc, int delta)
1788 struct ip6_sf_list *psf, *psf_prev;
1791 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1792 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1797 psf = (struct ip6_sf_list *)kmalloc(sizeof(*psf), GFP_ATOMIC);
1800 memset(psf, 0, sizeof(*psf));
1801 psf->sf_addr = *psfsrc;
1803 psf_prev->sf_next = psf;
1805 pmc->mca_sources = psf;
1807 psf->sf_count[sfmode]++;
1811 static void sf_markstate(struct ifmcaddr6 *pmc)
1813 struct ip6_sf_list *psf;
1814 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1816 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
1817 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1818 psf->sf_oldin = mca_xcount ==
1819 psf->sf_count[MCAST_EXCLUDE] &&
1820 !psf->sf_count[MCAST_INCLUDE];
1822 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
1825 static int sf_setstate(struct ifmcaddr6 *pmc)
1827 struct ip6_sf_list *psf;
1828 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1829 int qrv = pmc->idev->mc_qrv;
1833 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1834 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1835 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
1836 !psf->sf_count[MCAST_INCLUDE];
1838 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
1839 if (new_in != psf->sf_oldin) {
1840 psf->sf_crcount = qrv;
1848 * Add multicast source filter list to the interface list
1850 int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, int sfmode,
1851 int sfcount, struct in6_addr *psfsrc, int delta)
1853 struct ifmcaddr6 *pmc;
1859 read_lock_bh(&idev->lock);
1860 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1861 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
1865 /* MCA not found?? bug */
1866 read_unlock_bh(&idev->lock);
1869 spin_lock_bh(&pmc->mca_lock);
1872 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
1874 pmc->mca_sfcount[sfmode]++;
1876 for (i=0; i<sfcount; i++) {
1877 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta);
1885 pmc->mca_sfcount[sfmode]--;
1887 (void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
1888 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
1889 struct inet6_dev *idev = pmc->idev;
1890 struct ip6_sf_list *psf;
1892 /* filter mode change */
1893 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1894 pmc->mca_sfmode = MCAST_EXCLUDE;
1895 else if (pmc->mca_sfcount[MCAST_INCLUDE])
1896 pmc->mca_sfmode = MCAST_INCLUDE;
1897 /* else no filters; keep old mode for reports */
1899 pmc->mca_crcount = idev->mc_qrv;
1900 idev->mc_ifc_count = pmc->mca_crcount;
1901 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
1902 psf->sf_crcount = 0;
1903 mld_ifc_event(idev);
1904 } else if (sf_setstate(pmc))
1905 mld_ifc_event(idev);
1906 spin_unlock_bh(&pmc->mca_lock);
1907 read_unlock_bh(&idev->lock);
1911 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
1913 struct ip6_sf_list *psf, *nextpsf;
1915 for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
1916 nextpsf = psf->sf_next;
1919 pmc->mca_tomb = NULL;
1920 for (psf=pmc->mca_sources; psf; psf=nextpsf) {
1921 nextpsf = psf->sf_next;
1924 pmc->mca_sources = NULL;
1925 pmc->mca_sfmode = MCAST_EXCLUDE;
1926 pmc->mca_sfcount[MCAST_EXCLUDE] = 0;
1927 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
1931 static void igmp6_join_group(struct ifmcaddr6 *ma)
1933 unsigned long delay;
1935 if (ma->mca_flags & MAF_NOREPORT)
1938 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
1940 delay = net_random() % IGMP6_UNSOLICITED_IVAL;
1942 spin_lock_bh(&ma->mca_lock);
1943 if (del_timer(&ma->mca_timer)) {
1944 atomic_dec(&ma->mca_refcnt);
1945 delay = ma->mca_timer.expires - jiffies;
1948 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1949 atomic_inc(&ma->mca_refcnt);
1950 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
1951 spin_unlock_bh(&ma->mca_lock);
1954 int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
1955 struct inet6_dev *idev)
1959 if (iml->sflist == 0) {
1960 /* any-source empty exclude case */
1961 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
1963 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
1964 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
1965 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
1970 static void igmp6_leave_group(struct ifmcaddr6 *ma)
1972 if (MLD_V1_SEEN(ma->idev)) {
1973 if (ma->mca_flags & MAF_LAST_REPORTER)
1974 igmp6_send(&ma->mca_addr, ma->idev->dev,
1975 ICMPV6_MGM_REDUCTION);
1977 mld_add_delrec(ma->idev, ma);
1978 mld_ifc_event(ma->idev);
1982 static void mld_gq_timer_expire(unsigned long data)
1984 struct inet6_dev *idev = (struct inet6_dev *)data;
1986 idev->mc_gq_running = 0;
1987 mld_send_report(idev, NULL);
1988 __in6_dev_put(idev);
1991 static void mld_ifc_timer_expire(unsigned long data)
1993 struct inet6_dev *idev = (struct inet6_dev *)data;
1996 if (idev->mc_ifc_count) {
1997 idev->mc_ifc_count--;
1998 if (idev->mc_ifc_count)
1999 mld_ifc_start_timer(idev, idev->mc_maxdelay);
2001 __in6_dev_put(idev);
2004 static void mld_ifc_event(struct inet6_dev *idev)
2006 if (MLD_V1_SEEN(idev))
2008 idev->mc_ifc_count = idev->mc_qrv;
2009 mld_ifc_start_timer(idev, 1);
2013 static void igmp6_timer_handler(unsigned long data)
2015 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
2017 if (MLD_V1_SEEN(ma->idev))
2018 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2020 mld_send_report(ma->idev, ma);
2022 spin_lock(&ma->mca_lock);
2023 ma->mca_flags |= MAF_LAST_REPORTER;
2024 ma->mca_flags &= ~MAF_TIMER_RUNNING;
2025 spin_unlock(&ma->mca_lock);
2029 /* Device going down */
2031 void ipv6_mc_down(struct inet6_dev *idev)
2033 struct ifmcaddr6 *i;
2035 /* Withdraw multicast list */
2037 read_lock_bh(&idev->lock);
2038 idev->mc_ifc_count = 0;
2039 if (del_timer(&idev->mc_ifc_timer))
2040 __in6_dev_put(idev);
2041 idev->mc_gq_running = 0;
2042 if (del_timer(&idev->mc_gq_timer))
2043 __in6_dev_put(idev);
2045 for (i = idev->mc_list; i; i=i->next)
2046 igmp6_group_dropped(i);
2047 read_unlock_bh(&idev->lock);
2049 mld_clear_delrec(idev);
2053 /* Device going up */
2055 void ipv6_mc_up(struct inet6_dev *idev)
2057 struct ifmcaddr6 *i;
2059 /* Install multicast list, except for all-nodes (already installed) */
2061 read_lock_bh(&idev->lock);
2062 for (i = idev->mc_list; i; i=i->next)
2063 igmp6_group_added(i);
2064 read_unlock_bh(&idev->lock);
2067 /* IPv6 device initialization. */
2069 void ipv6_mc_init_dev(struct inet6_dev *idev)
2071 struct in6_addr maddr;
2073 write_lock_bh(&idev->lock);
2074 rwlock_init(&idev->mc_lock);
2075 idev->mc_gq_running = 0;
2076 init_timer(&idev->mc_gq_timer);
2077 idev->mc_gq_timer.data = (unsigned long) idev;
2078 idev->mc_gq_timer.function = &mld_gq_timer_expire;
2079 idev->mc_tomb = NULL;
2080 idev->mc_ifc_count = 0;
2081 init_timer(&idev->mc_ifc_timer);
2082 idev->mc_ifc_timer.data = (unsigned long) idev;
2083 idev->mc_ifc_timer.function = &mld_ifc_timer_expire;
2084 idev->mc_qrv = MLD_QRV_DEFAULT;
2085 idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL;
2086 idev->mc_v1_seen = 0;
2087 write_unlock_bh(&idev->lock);
2089 /* Add all-nodes address. */
2090 ipv6_addr_all_nodes(&maddr);
2091 ipv6_dev_mc_inc(idev->dev, &maddr);
2095 * Device is about to be destroyed: clean up.
2098 void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2100 struct ifmcaddr6 *i;
2101 struct in6_addr maddr;
2103 /* Deactivate timers */
2106 /* Delete all-nodes address. */
2107 ipv6_addr_all_nodes(&maddr);
2109 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2110 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2113 __ipv6_dev_mc_dec(idev, &maddr);
2115 if (idev->cnf.forwarding) {
2116 ipv6_addr_all_routers(&maddr);
2117 __ipv6_dev_mc_dec(idev, &maddr);
2120 write_lock_bh(&idev->lock);
2121 while ((i = idev->mc_list) != NULL) {
2122 idev->mc_list = i->next;
2123 write_unlock_bh(&idev->lock);
2125 igmp6_group_dropped(i);
2128 write_lock_bh(&idev->lock);
2130 write_unlock_bh(&idev->lock);
2133 #ifdef CONFIG_PROC_FS
2134 struct igmp6_mc_iter_state {
2135 struct net_device *dev;
2136 struct inet6_dev *idev;
2139 #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2141 static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
2143 struct ifmcaddr6 *im = NULL;
2144 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2146 for (state->dev = dev_base, state->idev = NULL;
2148 state->dev = state->dev->next) {
2149 struct inet6_dev *idev;
2150 idev = in6_dev_get(state->dev);
2153 read_lock_bh(&idev->lock);
2159 read_unlock_bh(&idev->lock);
2165 static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
2167 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2171 if (likely(state->idev != NULL)) {
2172 read_unlock_bh(&state->idev->lock);
2173 in6_dev_put(state->idev);
2175 state->dev = state->dev->next;
2180 state->idev = in6_dev_get(state->dev);
2183 read_lock_bh(&state->idev->lock);
2184 im = state->idev->mc_list;
2189 static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2191 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2193 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2195 return pos ? NULL : im;
2198 static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
2200 read_lock(&dev_base_lock);
2201 return igmp6_mc_get_idx(seq, *pos);
2204 static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2206 struct ifmcaddr6 *im;
2207 im = igmp6_mc_get_next(seq, v);
2212 static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
2214 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2215 if (likely(state->idev != NULL)) {
2216 read_unlock_bh(&state->idev->lock);
2217 in6_dev_put(state->idev);
2221 read_unlock(&dev_base_lock);
2224 static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
2226 struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
2227 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2230 "%-4d %-15s %04x%04x%04x%04x%04x%04x%04x%04x %5d %08X %ld\n",
2231 state->dev->ifindex, state->dev->name,
2233 im->mca_users, im->mca_flags,
2234 (im->mca_flags&MAF_TIMER_RUNNING) ?
2235 jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
2239 static struct seq_operations igmp6_mc_seq_ops = {
2240 .start = igmp6_mc_seq_start,
2241 .next = igmp6_mc_seq_next,
2242 .stop = igmp6_mc_seq_stop,
2243 .show = igmp6_mc_seq_show,
2246 static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
2248 struct seq_file *seq;
2250 struct igmp6_mc_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
2255 rc = seq_open(file, &igmp6_mc_seq_ops);
2259 seq = file->private_data;
2261 memset(s, 0, sizeof(*s));
2269 static struct file_operations igmp6_mc_seq_fops = {
2270 .owner = THIS_MODULE,
2271 .open = igmp6_mc_seq_open,
2273 .llseek = seq_lseek,
2274 .release = seq_release_private,
2277 struct igmp6_mcf_iter_state {
2278 struct net_device *dev;
2279 struct inet6_dev *idev;
2280 struct ifmcaddr6 *im;
2283 #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2285 static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
2287 struct ip6_sf_list *psf = NULL;
2288 struct ifmcaddr6 *im = NULL;
2289 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2291 for (state->dev = dev_base, state->idev = NULL, state->im = NULL;
2293 state->dev = state->dev->next) {
2294 struct inet6_dev *idev;
2295 idev = in6_dev_get(state->dev);
2296 if (unlikely(idev == NULL))
2298 read_lock_bh(&idev->lock);
2300 if (likely(im != NULL)) {
2301 spin_lock_bh(&im->mca_lock);
2302 psf = im->mca_sources;
2303 if (likely(psf != NULL)) {
2308 spin_unlock_bh(&im->mca_lock);
2310 read_unlock_bh(&idev->lock);
2316 static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
2318 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2322 spin_unlock_bh(&state->im->mca_lock);
2323 state->im = state->im->next;
2324 while (!state->im) {
2325 if (likely(state->idev != NULL)) {
2326 read_unlock_bh(&state->idev->lock);
2327 in6_dev_put(state->idev);
2329 state->dev = state->dev->next;
2334 state->idev = in6_dev_get(state->dev);
2337 read_lock_bh(&state->idev->lock);
2338 state->im = state->idev->mc_list;
2342 spin_lock_bh(&state->im->mca_lock);
2343 psf = state->im->mca_sources;
2349 static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2351 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2353 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2355 return pos ? NULL : psf;
2358 static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
2360 read_lock(&dev_base_lock);
2361 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2364 static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2366 struct ip6_sf_list *psf;
2367 if (v == SEQ_START_TOKEN)
2368 psf = igmp6_mcf_get_first(seq);
2370 psf = igmp6_mcf_get_next(seq, v);
2375 static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
2377 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2378 if (likely(state->im != NULL)) {
2379 spin_unlock_bh(&state->im->mca_lock);
2382 if (likely(state->idev != NULL)) {
2383 read_unlock_bh(&state->idev->lock);
2384 in6_dev_put(state->idev);
2388 read_unlock(&dev_base_lock);
2391 static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
2393 struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
2394 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2396 if (v == SEQ_START_TOKEN) {
2399 "%32s %32s %6s %6s\n", "Idx",
2400 "Device", "Multicast Address",
2401 "Source Address", "INC", "EXC");
2405 "%04x%04x%04x%04x%04x%04x%04x%04x "
2406 "%04x%04x%04x%04x%04x%04x%04x%04x "
2408 state->dev->ifindex, state->dev->name,
2409 NIP6(state->im->mca_addr),
2411 psf->sf_count[MCAST_INCLUDE],
2412 psf->sf_count[MCAST_EXCLUDE]);
2417 static struct seq_operations igmp6_mcf_seq_ops = {
2418 .start = igmp6_mcf_seq_start,
2419 .next = igmp6_mcf_seq_next,
2420 .stop = igmp6_mcf_seq_stop,
2421 .show = igmp6_mcf_seq_show,
2424 static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
2426 struct seq_file *seq;
2428 struct igmp6_mcf_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
2433 rc = seq_open(file, &igmp6_mcf_seq_ops);
2437 seq = file->private_data;
2439 memset(s, 0, sizeof(*s));
2447 static struct file_operations igmp6_mcf_seq_fops = {
2448 .owner = THIS_MODULE,
2449 .open = igmp6_mcf_seq_open,
2451 .llseek = seq_lseek,
2452 .release = seq_release_private,
2456 int __init igmp6_init(struct net_proto_family *ops)
2458 struct ipv6_pinfo *np;
2462 err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, &igmp6_socket);
2465 "Failed to initialize the IGMP6 control socket (err %d).\n",
2467 igmp6_socket = NULL; /* For safety. */
2471 sk = igmp6_socket->sk;
2472 sk->sk_allocation = GFP_ATOMIC;
2473 sk->sk_prot->unhash(sk);
2478 #ifdef CONFIG_PROC_FS
2479 proc_net_fops_create("igmp6", S_IRUGO, &igmp6_mc_seq_fops);
2480 proc_net_fops_create("mcfilter6", S_IRUGO, &igmp6_mcf_seq_fops);
2486 void igmp6_cleanup(void)
2488 sock_release(igmp6_socket);
2489 igmp6_socket = NULL; /* for safety */
2491 #ifdef CONFIG_PROC_FS
2492 proc_net_remove("mcfilter6");
2493 proc_net_remove("igmp6");