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 static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
126 /* Big mc list lock for all the sockets */
127 static DEFINE_RWLOCK(ipv6_sk_mc_lock);
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 static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca,
147 int sfmode, int sfcount, struct in6_addr *psfsrc,
149 static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca,
150 int sfmode, int sfcount, struct in6_addr *psfsrc,
152 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
153 struct inet6_dev *idev);
156 #define IGMP6_UNSOLICITED_IVAL (10*HZ)
157 #define MLD_QRV_DEFAULT 2
159 #define MLD_V1_SEEN(idev) (ipv6_devconf.force_mld_version == 1 || \
160 (idev)->cnf.force_mld_version == 1 || \
161 ((idev)->mc_v1_seen && \
162 time_before(jiffies, (idev)->mc_v1_seen)))
164 #define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
165 #define MLDV2_EXP(thresh, nbmant, nbexp, value) \
166 ((value) < (thresh) ? (value) : \
167 ((MLDV2_MASK(value, nbmant) | (1<<(nbmant+nbexp))) << \
168 (MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp))))
170 #define MLDV2_QQIC(value) MLDV2_EXP(0x80, 4, 3, value)
171 #define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value)
173 #define IPV6_MLD_MAX_MSF 10
175 int sysctl_mld_max_msf = IPV6_MLD_MAX_MSF;
178 * socket join on multicast group
181 int ipv6_sock_mc_join(struct sock *sk, int ifindex, struct in6_addr *addr)
183 struct net_device *dev = NULL;
184 struct ipv6_mc_socklist *mc_lst;
185 struct ipv6_pinfo *np = inet6_sk(sk);
188 if (!ipv6_addr_is_multicast(addr))
191 read_lock_bh(&ipv6_sk_mc_lock);
192 for (mc_lst=np->ipv6_mc_list; mc_lst; mc_lst=mc_lst->next) {
193 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
194 ipv6_addr_equal(&mc_lst->addr, addr)) {
195 read_unlock_bh(&ipv6_sk_mc_lock);
199 read_unlock_bh(&ipv6_sk_mc_lock);
201 mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
207 ipv6_addr_copy(&mc_lst->addr, addr);
211 rt = rt6_lookup(addr, NULL, 0, 0);
215 dst_release(&rt->u.dst);
218 dev = dev_get_by_index(ifindex);
221 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
225 mc_lst->ifindex = dev->ifindex;
226 mc_lst->sfmode = MCAST_EXCLUDE;
227 mc_lst->sflist = NULL;
230 * now add/increase the group membership on the device
233 err = ipv6_dev_mc_inc(dev, addr);
236 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
241 write_lock_bh(&ipv6_sk_mc_lock);
242 mc_lst->next = np->ipv6_mc_list;
243 np->ipv6_mc_list = mc_lst;
244 write_unlock_bh(&ipv6_sk_mc_lock);
252 * socket leave on multicast group
254 int ipv6_sock_mc_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
256 struct ipv6_pinfo *np = inet6_sk(sk);
257 struct ipv6_mc_socklist *mc_lst, **lnk;
259 write_lock_bh(&ipv6_sk_mc_lock);
260 for (lnk = &np->ipv6_mc_list; (mc_lst = *lnk) !=NULL ; lnk = &mc_lst->next) {
261 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
262 ipv6_addr_equal(&mc_lst->addr, addr)) {
263 struct net_device *dev;
266 write_unlock_bh(&ipv6_sk_mc_lock);
268 if ((dev = dev_get_by_index(mc_lst->ifindex)) != NULL) {
269 struct inet6_dev *idev = in6_dev_get(dev);
272 (void) ip6_mc_leave_src(sk,mc_lst,idev);
273 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
278 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
282 write_unlock_bh(&ipv6_sk_mc_lock);
284 return -EADDRNOTAVAIL;
287 static struct inet6_dev *ip6_mc_find_dev(struct in6_addr *group, int ifindex)
289 struct net_device *dev = NULL;
290 struct inet6_dev *idev = NULL;
295 rt = rt6_lookup(group, NULL, 0, 0);
299 dst_release(&rt->u.dst);
302 dev = dev_get_by_index(ifindex);
306 idev = in6_dev_get(dev);
311 read_lock_bh(&idev->lock);
313 read_unlock_bh(&idev->lock);
321 void ipv6_sock_mc_close(struct sock *sk)
323 struct ipv6_pinfo *np = inet6_sk(sk);
324 struct ipv6_mc_socklist *mc_lst;
326 write_lock_bh(&ipv6_sk_mc_lock);
327 while ((mc_lst = np->ipv6_mc_list) != NULL) {
328 struct net_device *dev;
330 np->ipv6_mc_list = mc_lst->next;
331 write_unlock_bh(&ipv6_sk_mc_lock);
333 dev = dev_get_by_index(mc_lst->ifindex);
335 struct inet6_dev *idev = in6_dev_get(dev);
338 (void) ip6_mc_leave_src(sk, mc_lst, idev);
339 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
345 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
347 write_lock_bh(&ipv6_sk_mc_lock);
349 write_unlock_bh(&ipv6_sk_mc_lock);
352 int ip6_mc_source(int add, int omode, struct sock *sk,
353 struct group_source_req *pgsr)
355 struct in6_addr *source, *group;
356 struct ipv6_mc_socklist *pmc;
357 struct net_device *dev;
358 struct inet6_dev *idev;
359 struct ipv6_pinfo *inet6 = inet6_sk(sk);
360 struct ip6_sf_socklist *psl;
365 if (pgsr->gsr_group.ss_family != AF_INET6 ||
366 pgsr->gsr_source.ss_family != AF_INET6)
369 source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
370 group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
372 if (!ipv6_addr_is_multicast(group))
375 idev = ip6_mc_find_dev(group, pgsr->gsr_interface);
380 err = -EADDRNOTAVAIL;
382 read_lock_bh(&ipv6_sk_mc_lock);
383 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
384 if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
386 if (ipv6_addr_equal(&pmc->addr, group))
389 if (!pmc) { /* must have a prior join */
393 /* if a source filter was set, must be the same mode as before */
395 if (pmc->sfmode != omode) {
399 } else if (pmc->sfmode != omode) {
400 /* allow mode switches for empty-set filters */
401 ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
402 ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
409 goto done; /* err = -EADDRNOTAVAIL */
411 for (i=0; i<psl->sl_count; i++) {
412 rv = memcmp(&psl->sl_addr[i], source,
413 sizeof(struct in6_addr));
417 if (rv) /* source not found */
418 goto done; /* err = -EADDRNOTAVAIL */
420 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
421 if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
426 /* update the interface filter */
427 ip6_mc_del_src(idev, group, omode, 1, source, 1);
429 for (j=i+1; j<psl->sl_count; j++)
430 psl->sl_addr[j-1] = psl->sl_addr[j];
435 /* else, add a new source to the filter */
437 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
441 if (!psl || psl->sl_count == psl->sl_max) {
442 struct ip6_sf_socklist *newpsl;
443 int count = IP6_SFBLOCK;
446 count += psl->sl_max;
447 newpsl = (struct ip6_sf_socklist *)sock_kmalloc(sk,
448 IP6_SFLSIZE(count), GFP_ATOMIC);
453 newpsl->sl_max = count;
454 newpsl->sl_count = count - IP6_SFBLOCK;
456 for (i=0; i<psl->sl_count; i++)
457 newpsl->sl_addr[i] = psl->sl_addr[i];
458 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
460 pmc->sflist = psl = newpsl;
462 rv = 1; /* > 0 for insert logic below if sl_count is 0 */
463 for (i=0; i<psl->sl_count; i++) {
464 rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr));
468 if (rv == 0) /* address already there is an error */
470 for (j=psl->sl_count-1; j>=i; j--)
471 psl->sl_addr[j+1] = psl->sl_addr[j];
472 psl->sl_addr[i] = *source;
475 /* update the interface list */
476 ip6_mc_add_src(idev, group, omode, 1, source, 1);
478 read_unlock_bh(&ipv6_sk_mc_lock);
479 read_unlock_bh(&idev->lock);
483 return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
487 int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
489 struct in6_addr *group;
490 struct ipv6_mc_socklist *pmc;
491 struct net_device *dev;
492 struct inet6_dev *idev;
493 struct ipv6_pinfo *inet6 = inet6_sk(sk);
494 struct ip6_sf_socklist *newpsl, *psl;
498 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
500 if (!ipv6_addr_is_multicast(group))
502 if (gsf->gf_fmode != MCAST_INCLUDE &&
503 gsf->gf_fmode != MCAST_EXCLUDE)
506 idev = ip6_mc_find_dev(group, gsf->gf_interface);
512 if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
517 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
518 if (pmc->ifindex != gsf->gf_interface)
520 if (ipv6_addr_equal(&pmc->addr, group))
523 if (!pmc) { /* must have a prior join */
527 if (gsf->gf_numsrc) {
528 newpsl = (struct ip6_sf_socklist *)sock_kmalloc(sk,
529 IP6_SFLSIZE(gsf->gf_numsrc), GFP_ATOMIC);
534 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
535 for (i=0; i<newpsl->sl_count; ++i) {
536 struct sockaddr_in6 *psin6;
538 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
539 newpsl->sl_addr[i] = psin6->sin6_addr;
541 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
542 newpsl->sl_count, newpsl->sl_addr, 0);
544 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
551 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
552 psl->sl_count, psl->sl_addr, 0);
553 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
555 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
556 pmc->sflist = newpsl;
557 pmc->sfmode = gsf->gf_fmode;
560 read_unlock_bh(&idev->lock);
564 err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
568 int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
569 struct group_filter __user *optval, int __user *optlen)
571 int err, i, count, copycount;
572 struct in6_addr *group;
573 struct ipv6_mc_socklist *pmc;
574 struct inet6_dev *idev;
575 struct net_device *dev;
576 struct ipv6_pinfo *inet6 = inet6_sk(sk);
577 struct ip6_sf_socklist *psl;
579 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
581 if (!ipv6_addr_is_multicast(group))
584 idev = ip6_mc_find_dev(group, gsf->gf_interface);
591 err = -EADDRNOTAVAIL;
593 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
594 if (pmc->ifindex != gsf->gf_interface)
596 if (ipv6_addr_equal(group, &pmc->addr))
599 if (!pmc) /* must have a prior join */
601 gsf->gf_fmode = pmc->sfmode;
603 count = psl ? psl->sl_count : 0;
604 read_unlock_bh(&idev->lock);
608 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
609 gsf->gf_numsrc = count;
610 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
611 copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
614 for (i=0; i<copycount; i++) {
615 struct sockaddr_in6 *psin6;
616 struct sockaddr_storage ss;
618 psin6 = (struct sockaddr_in6 *)&ss;
619 memset(&ss, 0, sizeof(ss));
620 psin6->sin6_family = AF_INET6;
621 psin6->sin6_addr = psl->sl_addr[i];
622 if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
627 read_unlock_bh(&idev->lock);
633 int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
634 struct in6_addr *src_addr)
636 struct ipv6_pinfo *np = inet6_sk(sk);
637 struct ipv6_mc_socklist *mc;
638 struct ip6_sf_socklist *psl;
641 read_lock(&ipv6_sk_mc_lock);
642 for (mc = np->ipv6_mc_list; mc; mc = mc->next) {
643 if (ipv6_addr_equal(&mc->addr, mc_addr))
647 read_unlock(&ipv6_sk_mc_lock);
652 rv = mc->sfmode == MCAST_EXCLUDE;
656 for (i=0; i<psl->sl_count; i++) {
657 if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
660 if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
662 if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
665 read_unlock(&ipv6_sk_mc_lock);
670 static void ma_put(struct ifmcaddr6 *mc)
672 if (atomic_dec_and_test(&mc->mca_refcnt)) {
673 in6_dev_put(mc->idev);
678 static void igmp6_group_added(struct ifmcaddr6 *mc)
680 struct net_device *dev = mc->idev->dev;
681 char buf[MAX_ADDR_LEN];
683 spin_lock_bh(&mc->mca_lock);
684 if (!(mc->mca_flags&MAF_LOADED)) {
685 mc->mca_flags |= MAF_LOADED;
686 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
687 dev_mc_add(dev, buf, dev->addr_len, 0);
689 spin_unlock_bh(&mc->mca_lock);
691 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
694 if (MLD_V1_SEEN(mc->idev)) {
695 igmp6_join_group(mc);
700 mc->mca_crcount = mc->idev->mc_qrv;
701 mld_ifc_event(mc->idev);
704 static void igmp6_group_dropped(struct ifmcaddr6 *mc)
706 struct net_device *dev = mc->idev->dev;
707 char buf[MAX_ADDR_LEN];
709 spin_lock_bh(&mc->mca_lock);
710 if (mc->mca_flags&MAF_LOADED) {
711 mc->mca_flags &= ~MAF_LOADED;
712 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
713 dev_mc_delete(dev, buf, dev->addr_len, 0);
716 if (mc->mca_flags & MAF_NOREPORT)
718 spin_unlock_bh(&mc->mca_lock);
721 igmp6_leave_group(mc);
723 spin_lock_bh(&mc->mca_lock);
724 if (del_timer(&mc->mca_timer))
725 atomic_dec(&mc->mca_refcnt);
727 ip6_mc_clear_src(mc);
728 spin_unlock_bh(&mc->mca_lock);
732 * deleted ifmcaddr6 manipulation
734 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
736 struct ifmcaddr6 *pmc;
738 /* this is an "ifmcaddr6" for convenience; only the fields below
739 * are actually used. In particular, the refcnt and users are not
740 * used for management of the delete list. Using the same structure
741 * for deleted items allows change reports to use common code with
742 * non-deleted or query-response MCA's.
744 pmc = (struct ifmcaddr6 *)kmalloc(sizeof(*pmc), GFP_ATOMIC);
747 memset(pmc, 0, sizeof(*pmc));
748 spin_lock_bh(&im->mca_lock);
749 spin_lock_init(&pmc->mca_lock);
750 pmc->idev = im->idev;
752 pmc->mca_addr = im->mca_addr;
753 pmc->mca_crcount = idev->mc_qrv;
754 pmc->mca_sfmode = im->mca_sfmode;
755 if (pmc->mca_sfmode == MCAST_INCLUDE) {
756 struct ip6_sf_list *psf;
758 pmc->mca_tomb = im->mca_tomb;
759 pmc->mca_sources = im->mca_sources;
760 im->mca_tomb = im->mca_sources = NULL;
761 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
762 psf->sf_crcount = pmc->mca_crcount;
764 spin_unlock_bh(&im->mca_lock);
766 write_lock_bh(&idev->mc_lock);
767 pmc->next = idev->mc_tomb;
769 write_unlock_bh(&idev->mc_lock);
772 static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca)
774 struct ifmcaddr6 *pmc, *pmc_prev;
775 struct ip6_sf_list *psf, *psf_next;
777 write_lock_bh(&idev->mc_lock);
779 for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
780 if (ipv6_addr_equal(&pmc->mca_addr, pmca))
786 pmc_prev->next = pmc->next;
788 idev->mc_tomb = pmc->next;
790 write_unlock_bh(&idev->mc_lock);
792 for (psf=pmc->mca_tomb; psf; psf=psf_next) {
793 psf_next = psf->sf_next;
796 in6_dev_put(pmc->idev);
801 static void mld_clear_delrec(struct inet6_dev *idev)
803 struct ifmcaddr6 *pmc, *nextpmc;
805 write_lock_bh(&idev->mc_lock);
807 idev->mc_tomb = NULL;
808 write_unlock_bh(&idev->mc_lock);
810 for (; pmc; pmc = nextpmc) {
812 ip6_mc_clear_src(pmc);
813 in6_dev_put(pmc->idev);
817 /* clear dead sources, too */
818 read_lock_bh(&idev->lock);
819 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
820 struct ip6_sf_list *psf, *psf_next;
822 spin_lock_bh(&pmc->mca_lock);
824 pmc->mca_tomb = NULL;
825 spin_unlock_bh(&pmc->mca_lock);
826 for (; psf; psf=psf_next) {
827 psf_next = psf->sf_next;
831 read_unlock_bh(&idev->lock);
836 * device multicast group inc (add if not found)
838 int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr)
840 struct ifmcaddr6 *mc;
841 struct inet6_dev *idev;
843 idev = in6_dev_get(dev);
848 write_lock_bh(&idev->lock);
850 write_unlock_bh(&idev->lock);
855 for (mc = idev->mc_list; mc; mc = mc->next) {
856 if (ipv6_addr_equal(&mc->mca_addr, addr)) {
858 write_unlock_bh(&idev->lock);
859 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
867 * not found: create a new one.
870 mc = kmalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
873 write_unlock_bh(&idev->lock);
878 memset(mc, 0, sizeof(struct ifmcaddr6));
879 init_timer(&mc->mca_timer);
880 mc->mca_timer.function = igmp6_timer_handler;
881 mc->mca_timer.data = (unsigned long) mc;
883 ipv6_addr_copy(&mc->mca_addr, addr);
886 /* mca_stamp should be updated upon changes */
887 mc->mca_cstamp = mc->mca_tstamp = jiffies;
888 atomic_set(&mc->mca_refcnt, 2);
889 spin_lock_init(&mc->mca_lock);
891 /* initial mode is (EX, empty) */
892 mc->mca_sfmode = MCAST_EXCLUDE;
893 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
895 if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
896 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
897 mc->mca_flags |= MAF_NOREPORT;
899 mc->next = idev->mc_list;
901 write_unlock_bh(&idev->lock);
903 mld_del_delrec(idev, &mc->mca_addr);
904 igmp6_group_added(mc);
910 * device multicast group del
912 int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr)
914 struct ifmcaddr6 *ma, **map;
916 write_lock_bh(&idev->lock);
917 for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
918 if (ipv6_addr_equal(&ma->mca_addr, addr)) {
919 if (--ma->mca_users == 0) {
921 write_unlock_bh(&idev->lock);
923 igmp6_group_dropped(ma);
928 write_unlock_bh(&idev->lock);
932 write_unlock_bh(&idev->lock);
937 int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr)
939 struct inet6_dev *idev = in6_dev_get(dev);
945 err = __ipv6_dev_mc_dec(idev, addr);
953 * identify MLD packets for MLD filter exceptions
955 int ipv6_is_mld(struct sk_buff *skb, int nexthdr)
957 struct icmp6hdr *pic;
959 if (nexthdr != IPPROTO_ICMPV6)
962 if (!pskb_may_pull(skb, sizeof(struct icmp6hdr)))
965 pic = (struct icmp6hdr *)skb->h.raw;
967 switch (pic->icmp6_type) {
968 case ICMPV6_MGM_QUERY:
969 case ICMPV6_MGM_REPORT:
970 case ICMPV6_MGM_REDUCTION:
971 case ICMPV6_MLD2_REPORT:
980 * check if the interface/address pair is valid
982 int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
983 struct in6_addr *src_addr)
985 struct inet6_dev *idev;
986 struct ifmcaddr6 *mc;
989 idev = in6_dev_get(dev);
991 read_lock_bh(&idev->lock);
992 for (mc = idev->mc_list; mc; mc=mc->next) {
993 if (ipv6_addr_equal(&mc->mca_addr, group))
997 if (src_addr && !ipv6_addr_any(src_addr)) {
998 struct ip6_sf_list *psf;
1000 spin_lock_bh(&mc->mca_lock);
1001 for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
1002 if (ipv6_addr_equal(&psf->sf_addr, src_addr))
1006 rv = psf->sf_count[MCAST_INCLUDE] ||
1007 psf->sf_count[MCAST_EXCLUDE] !=
1008 mc->mca_sfcount[MCAST_EXCLUDE];
1010 rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0;
1011 spin_unlock_bh(&mc->mca_lock);
1013 rv = 1; /* don't filter unspecified source */
1015 read_unlock_bh(&idev->lock);
1021 static void mld_gq_start_timer(struct inet6_dev *idev)
1023 int tv = net_random() % idev->mc_maxdelay;
1025 idev->mc_gq_running = 1;
1026 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
1030 static void mld_ifc_start_timer(struct inet6_dev *idev, int delay)
1032 int tv = net_random() % delay;
1034 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
1039 * IGMP handling (alias multicast ICMPv6 messages)
1042 static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
1044 unsigned long delay = resptime;
1046 /* Do not start timer for these addresses */
1047 if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
1048 IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
1051 if (del_timer(&ma->mca_timer)) {
1052 atomic_dec(&ma->mca_refcnt);
1053 delay = ma->mca_timer.expires - jiffies;
1056 if (delay >= resptime) {
1058 delay = net_random() % resptime;
1062 ma->mca_timer.expires = jiffies + delay;
1063 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1064 atomic_inc(&ma->mca_refcnt);
1065 ma->mca_flags |= MAF_TIMER_RUNNING;
1068 static void mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
1069 struct in6_addr *srcs)
1071 struct ip6_sf_list *psf;
1075 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1076 if (scount == nsrcs)
1078 for (i=0; i<nsrcs; i++)
1079 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1087 int igmp6_event_query(struct sk_buff *skb)
1089 struct mld2_query *mlh2 = (struct mld2_query *) skb->h.raw;
1090 struct ifmcaddr6 *ma;
1091 struct in6_addr *group;
1092 unsigned long max_delay;
1093 struct inet6_dev *idev;
1094 struct icmp6hdr *hdr;
1099 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1102 /* compute payload length excluding extension headers */
1103 len = ntohs(skb->nh.ipv6h->payload_len) + sizeof(struct ipv6hdr);
1104 len -= (char *)skb->h.raw - (char *)skb->nh.ipv6h;
1106 /* Drop queries with not link local source */
1107 if (!(ipv6_addr_type(&skb->nh.ipv6h->saddr)&IPV6_ADDR_LINKLOCAL))
1110 idev = in6_dev_get(skb->dev);
1115 hdr = (struct icmp6hdr *) skb->h.raw;
1116 group = (struct in6_addr *) (hdr + 1);
1117 group_type = ipv6_addr_type(group);
1119 if (group_type != IPV6_ADDR_ANY &&
1120 !(group_type&IPV6_ADDR_MULTICAST)) {
1127 /* MLDv1 router present */
1129 /* Translate milliseconds to jiffies */
1130 max_delay = (ntohs(hdr->icmp6_maxdelay)*HZ)/1000;
1132 switchback = (idev->mc_qrv + 1) * max_delay;
1133 idev->mc_v1_seen = jiffies + switchback;
1135 /* cancel the interface change timer */
1136 idev->mc_ifc_count = 0;
1137 if (del_timer(&idev->mc_ifc_timer))
1138 __in6_dev_put(idev);
1139 /* clear deleted report items */
1140 mld_clear_delrec(idev);
1141 } else if (len >= 28) {
1142 max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000;
1145 idev->mc_maxdelay = max_delay;
1147 idev->mc_qrv = mlh2->qrv;
1148 if (group_type == IPV6_ADDR_ANY) { /* general query */
1151 return -EINVAL; /* no sources allowed */
1153 mld_gq_start_timer(idev);
1157 /* mark sources to include, if group & source-specific */
1158 mark = mlh2->nsrcs != 0;
1164 read_lock_bh(&idev->lock);
1165 if (group_type == IPV6_ADDR_ANY) {
1166 for (ma = idev->mc_list; ma; ma=ma->next) {
1167 spin_lock_bh(&ma->mca_lock);
1168 igmp6_group_queried(ma, max_delay);
1169 spin_unlock_bh(&ma->mca_lock);
1172 for (ma = idev->mc_list; ma; ma=ma->next) {
1173 if (group_type != IPV6_ADDR_ANY &&
1174 !ipv6_addr_equal(group, &ma->mca_addr))
1176 spin_lock_bh(&ma->mca_lock);
1177 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1178 /* gsquery <- gsquery && mark */
1180 ma->mca_flags &= ~MAF_GSQUERY;
1182 /* gsquery <- mark */
1184 ma->mca_flags |= MAF_GSQUERY;
1186 ma->mca_flags &= ~MAF_GSQUERY;
1188 if (ma->mca_flags & MAF_GSQUERY)
1189 mld_marksources(ma, ntohs(mlh2->nsrcs),
1191 igmp6_group_queried(ma, max_delay);
1192 spin_unlock_bh(&ma->mca_lock);
1193 if (group_type != IPV6_ADDR_ANY)
1197 read_unlock_bh(&idev->lock);
1204 int igmp6_event_report(struct sk_buff *skb)
1206 struct ifmcaddr6 *ma;
1207 struct in6_addr *addrp;
1208 struct inet6_dev *idev;
1209 struct icmp6hdr *hdr;
1212 /* Our own report looped back. Ignore it. */
1213 if (skb->pkt_type == PACKET_LOOPBACK)
1216 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1219 hdr = (struct icmp6hdr*) skb->h.raw;
1221 /* Drop reports with not link local source */
1222 addr_type = ipv6_addr_type(&skb->nh.ipv6h->saddr);
1223 if (addr_type != IPV6_ADDR_ANY &&
1224 !(addr_type&IPV6_ADDR_LINKLOCAL))
1227 addrp = (struct in6_addr *) (hdr + 1);
1229 idev = in6_dev_get(skb->dev);
1234 * Cancel the timer for this group
1237 read_lock_bh(&idev->lock);
1238 for (ma = idev->mc_list; ma; ma=ma->next) {
1239 if (ipv6_addr_equal(&ma->mca_addr, addrp)) {
1240 spin_lock(&ma->mca_lock);
1241 if (del_timer(&ma->mca_timer))
1242 atomic_dec(&ma->mca_refcnt);
1243 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1244 spin_unlock(&ma->mca_lock);
1248 read_unlock_bh(&idev->lock);
1253 static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1254 int gdeleted, int sdeleted)
1257 case MLD2_MODE_IS_INCLUDE:
1258 case MLD2_MODE_IS_EXCLUDE:
1259 if (gdeleted || sdeleted)
1261 return !((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp);
1262 case MLD2_CHANGE_TO_INCLUDE:
1263 if (gdeleted || sdeleted)
1265 return psf->sf_count[MCAST_INCLUDE] != 0;
1266 case MLD2_CHANGE_TO_EXCLUDE:
1267 if (gdeleted || sdeleted)
1269 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1270 psf->sf_count[MCAST_INCLUDE])
1272 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1273 psf->sf_count[MCAST_EXCLUDE];
1274 case MLD2_ALLOW_NEW_SOURCES:
1275 if (gdeleted || !psf->sf_crcount)
1277 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1278 case MLD2_BLOCK_OLD_SOURCES:
1279 if (pmc->mca_sfmode == MCAST_INCLUDE)
1280 return gdeleted || (psf->sf_crcount && sdeleted);
1281 return psf->sf_crcount && !gdeleted && !sdeleted;
1287 mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1289 struct ip6_sf_list *psf;
1292 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1293 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1300 static struct sk_buff *mld_newpack(struct net_device *dev, int size)
1302 struct sock *sk = igmp6_socket->sk;
1303 struct sk_buff *skb;
1304 struct mld2_report *pmr;
1305 struct in6_addr addr_buf;
1307 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1308 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1311 /* we assume size > sizeof(ra) here */
1312 skb = sock_alloc_send_skb(sk, size + LL_RESERVED_SPACE(dev), 1, &err);
1317 skb_reserve(skb, LL_RESERVED_SPACE(dev));
1319 if (ipv6_get_lladdr(dev, &addr_buf)) {
1320 /* <draft-ietf-magma-mld-source-05.txt>:
1321 * use unspecified address as the source address
1322 * when a valid link-local address is not available.
1324 memset(&addr_buf, 0, sizeof(addr_buf));
1327 ip6_nd_hdr(sk, skb, dev, &addr_buf, &mld2_all_mcr, NEXTHDR_HOP, 0);
1329 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1331 pmr =(struct mld2_report *)skb_put(skb, sizeof(*pmr));
1332 skb->h.raw = (unsigned char *)pmr;
1333 pmr->type = ICMPV6_MLD2_REPORT;
1341 static inline int mld_dev_queue_xmit2(struct sk_buff *skb)
1343 struct net_device *dev = skb->dev;
1345 if (dev->hard_header) {
1346 unsigned char ha[MAX_ADDR_LEN];
1349 ndisc_mc_map(&skb->nh.ipv6h->daddr, ha, dev, 1);
1350 err = dev->hard_header(skb, dev, ETH_P_IPV6, ha, NULL, skb->len);
1356 return dev_queue_xmit(skb);
1359 static inline int mld_dev_queue_xmit(struct sk_buff *skb)
1361 return NF_HOOK(PF_INET6, NF_IP6_POST_ROUTING, skb, NULL, skb->dev,
1362 mld_dev_queue_xmit2);
1365 static void mld_sendpack(struct sk_buff *skb)
1367 struct ipv6hdr *pip6 = skb->nh.ipv6h;
1368 struct mld2_report *pmr = (struct mld2_report *)skb->h.raw;
1369 int payload_len, mldlen;
1370 struct inet6_dev *idev = in6_dev_get(skb->dev);
1373 IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
1374 payload_len = skb->tail - (unsigned char *)skb->nh.ipv6h -
1375 sizeof(struct ipv6hdr);
1376 mldlen = skb->tail - skb->h.raw;
1377 pip6->payload_len = htons(payload_len);
1379 pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
1380 IPPROTO_ICMPV6, csum_partial(skb->h.raw, mldlen, 0));
1381 err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev,
1382 mld_dev_queue_xmit);
1384 ICMP6_INC_STATS(idev,ICMP6_MIB_OUTMSGS);
1385 IP6_INC_STATS(IPSTATS_MIB_OUTMCASTPKTS);
1387 IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
1389 if (likely(idev != NULL))
1393 static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
1395 return sizeof(struct mld2_grec) + 4*mld_scount(pmc,type,gdel,sdel);
1398 static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1399 int type, struct mld2_grec **ppgr)
1401 struct net_device *dev = pmc->idev->dev;
1402 struct mld2_report *pmr;
1403 struct mld2_grec *pgr;
1406 skb = mld_newpack(dev, dev->mtu);
1409 pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
1410 pgr->grec_type = type;
1411 pgr->grec_auxwords = 0;
1412 pgr->grec_nsrcs = 0;
1413 pgr->grec_mca = pmc->mca_addr; /* structure copy */
1414 pmr = (struct mld2_report *)skb->h.raw;
1415 pmr->ngrec = htons(ntohs(pmr->ngrec)+1);
1420 #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
1421 skb_tailroom(skb)) : 0)
1423 static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1424 int type, int gdeleted, int sdeleted)
1426 struct net_device *dev = pmc->idev->dev;
1427 struct mld2_report *pmr;
1428 struct mld2_grec *pgr = NULL;
1429 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
1430 int scount, first, isquery, truncate;
1432 if (pmc->mca_flags & MAF_NOREPORT)
1435 isquery = type == MLD2_MODE_IS_INCLUDE ||
1436 type == MLD2_MODE_IS_EXCLUDE;
1437 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1438 type == MLD2_CHANGE_TO_EXCLUDE;
1440 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1443 if (type == MLD2_ALLOW_NEW_SOURCES ||
1444 type == MLD2_BLOCK_OLD_SOURCES)
1446 if (pmc->mca_crcount || isquery) {
1447 /* make sure we have room for group header and at
1450 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)+
1451 sizeof(struct in6_addr)) {
1453 skb = NULL; /* add_grhead will get a new one */
1455 skb = add_grhead(skb, pmc, type, &pgr);
1459 pmr = skb ? (struct mld2_report *)skb->h.raw : NULL;
1461 /* EX and TO_EX get a fresh packet, if needed */
1463 if (pmr && pmr->ngrec &&
1464 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1467 skb = mld_newpack(dev, dev->mtu);
1473 for (psf=*psf_list; psf; psf=psf_next) {
1474 struct in6_addr *psrc;
1476 psf_next = psf->sf_next;
1478 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1483 /* clear marks on query responses */
1487 if (AVAILABLE(skb) < sizeof(*psrc) +
1488 first*sizeof(struct mld2_grec)) {
1489 if (truncate && !first)
1490 break; /* truncate these */
1492 pgr->grec_nsrcs = htons(scount);
1495 skb = mld_newpack(dev, dev->mtu);
1500 skb = add_grhead(skb, pmc, type, &pgr);
1503 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1504 *psrc = psf->sf_addr;
1506 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1507 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1509 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1511 psf_prev->sf_next = psf->sf_next;
1513 *psf_list = psf->sf_next;
1521 pgr->grec_nsrcs = htons(scount);
1524 pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
1528 static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1530 struct sk_buff *skb = NULL;
1534 read_lock_bh(&idev->lock);
1535 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1536 if (pmc->mca_flags & MAF_NOREPORT)
1538 spin_lock_bh(&pmc->mca_lock);
1539 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1540 type = MLD2_MODE_IS_EXCLUDE;
1542 type = MLD2_MODE_IS_INCLUDE;
1543 skb = add_grec(skb, pmc, type, 0, 0);
1544 spin_unlock_bh(&pmc->mca_lock);
1546 read_unlock_bh(&idev->lock);
1548 spin_lock_bh(&pmc->mca_lock);
1549 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1550 type = MLD2_MODE_IS_EXCLUDE;
1552 type = MLD2_MODE_IS_INCLUDE;
1553 skb = add_grec(skb, pmc, type, 0, 0);
1554 spin_unlock_bh(&pmc->mca_lock);
1561 * remove zero-count source records from a source filter list
1563 static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1565 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1568 for (psf=*ppsf; psf; psf = psf_next) {
1569 psf_next = psf->sf_next;
1570 if (psf->sf_crcount == 0) {
1572 psf_prev->sf_next = psf->sf_next;
1574 *ppsf = psf->sf_next;
1581 static void mld_send_cr(struct inet6_dev *idev)
1583 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1584 struct sk_buff *skb = NULL;
1587 read_lock_bh(&idev->lock);
1588 write_lock_bh(&idev->mc_lock);
1592 for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
1593 pmc_next = pmc->next;
1594 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1595 type = MLD2_BLOCK_OLD_SOURCES;
1596 dtype = MLD2_BLOCK_OLD_SOURCES;
1597 skb = add_grec(skb, pmc, type, 1, 0);
1598 skb = add_grec(skb, pmc, dtype, 1, 1);
1600 if (pmc->mca_crcount) {
1602 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1603 type = MLD2_CHANGE_TO_INCLUDE;
1604 skb = add_grec(skb, pmc, type, 1, 0);
1606 if (pmc->mca_crcount == 0) {
1607 mld_clear_zeros(&pmc->mca_tomb);
1608 mld_clear_zeros(&pmc->mca_sources);
1611 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1612 !pmc->mca_sources) {
1614 pmc_prev->next = pmc_next;
1616 idev->mc_tomb = pmc_next;
1617 in6_dev_put(pmc->idev);
1622 write_unlock_bh(&idev->mc_lock);
1625 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1626 spin_lock_bh(&pmc->mca_lock);
1627 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1628 type = MLD2_BLOCK_OLD_SOURCES;
1629 dtype = MLD2_ALLOW_NEW_SOURCES;
1631 type = MLD2_ALLOW_NEW_SOURCES;
1632 dtype = MLD2_BLOCK_OLD_SOURCES;
1634 skb = add_grec(skb, pmc, type, 0, 0);
1635 skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
1637 /* filter mode changes */
1638 if (pmc->mca_crcount) {
1640 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1641 type = MLD2_CHANGE_TO_EXCLUDE;
1643 type = MLD2_CHANGE_TO_INCLUDE;
1644 skb = add_grec(skb, pmc, type, 0, 0);
1646 spin_unlock_bh(&pmc->mca_lock);
1648 read_unlock_bh(&idev->lock);
1651 (void) mld_sendpack(skb);
1654 static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1656 struct sock *sk = igmp6_socket->sk;
1657 struct inet6_dev *idev;
1658 struct sk_buff *skb;
1659 struct icmp6hdr *hdr;
1660 struct in6_addr *snd_addr;
1661 struct in6_addr *addrp;
1662 struct in6_addr addr_buf;
1663 struct in6_addr all_routers;
1664 int err, len, payload_len, full_len;
1665 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1666 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1669 IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS);
1671 if (type == ICMPV6_MGM_REDUCTION) {
1672 snd_addr = &all_routers;
1673 ipv6_addr_all_routers(&all_routers);
1676 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1677 payload_len = len + sizeof(ra);
1678 full_len = sizeof(struct ipv6hdr) + payload_len;
1680 skb = sock_alloc_send_skb(sk, LL_RESERVED_SPACE(dev) + full_len, 1, &err);
1683 IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
1687 skb_reserve(skb, LL_RESERVED_SPACE(dev));
1689 if (ipv6_get_lladdr(dev, &addr_buf)) {
1690 /* <draft-ietf-magma-mld-source-05.txt>:
1691 * use unspecified address as the source address
1692 * when a valid link-local address is not available.
1694 memset(&addr_buf, 0, sizeof(addr_buf));
1697 ip6_nd_hdr(sk, skb, dev, &addr_buf, snd_addr, NEXTHDR_HOP, payload_len);
1699 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1701 hdr = (struct icmp6hdr *) skb_put(skb, sizeof(struct icmp6hdr));
1702 memset(hdr, 0, sizeof(struct icmp6hdr));
1703 hdr->icmp6_type = type;
1705 addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr));
1706 ipv6_addr_copy(addrp, addr);
1708 hdr->icmp6_cksum = csum_ipv6_magic(&addr_buf, snd_addr, len,
1710 csum_partial((__u8 *) hdr, len, 0));
1712 idev = in6_dev_get(skb->dev);
1714 err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev,
1715 mld_dev_queue_xmit);
1717 if (type == ICMPV6_MGM_REDUCTION)
1718 ICMP6_INC_STATS(idev, ICMP6_MIB_OUTGROUPMEMBREDUCTIONS);
1720 ICMP6_INC_STATS(idev, ICMP6_MIB_OUTGROUPMEMBRESPONSES);
1721 ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS);
1722 IP6_INC_STATS(IPSTATS_MIB_OUTMCASTPKTS);
1724 IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS);
1726 if (likely(idev != NULL))
1731 static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
1732 struct in6_addr *psfsrc)
1734 struct ip6_sf_list *psf, *psf_prev;
1738 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1739 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1743 if (!psf || psf->sf_count[sfmode] == 0) {
1744 /* source filter not found, or count wrong => bug */
1747 psf->sf_count[sfmode]--;
1748 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
1749 struct inet6_dev *idev = pmc->idev;
1751 /* no more filters for this source */
1753 psf_prev->sf_next = psf->sf_next;
1755 pmc->mca_sources = psf->sf_next;
1756 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
1757 !MLD_V1_SEEN(idev)) {
1758 psf->sf_crcount = idev->mc_qrv;
1759 psf->sf_next = pmc->mca_tomb;
1760 pmc->mca_tomb = psf;
1768 static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca,
1769 int sfmode, int sfcount, struct in6_addr *psfsrc,
1772 struct ifmcaddr6 *pmc;
1778 read_lock_bh(&idev->lock);
1779 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1780 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
1784 /* MCA not found?? bug */
1785 read_unlock_bh(&idev->lock);
1788 spin_lock_bh(&pmc->mca_lock);
1791 if (!pmc->mca_sfcount[sfmode]) {
1792 spin_unlock_bh(&pmc->mca_lock);
1793 read_unlock_bh(&idev->lock);
1796 pmc->mca_sfcount[sfmode]--;
1799 for (i=0; i<sfcount; i++) {
1800 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
1802 changerec |= rv > 0;
1806 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
1807 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
1808 pmc->mca_sfcount[MCAST_INCLUDE]) {
1809 struct ip6_sf_list *psf;
1811 /* filter mode change */
1812 pmc->mca_sfmode = MCAST_INCLUDE;
1813 pmc->mca_crcount = idev->mc_qrv;
1814 idev->mc_ifc_count = pmc->mca_crcount;
1815 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
1816 psf->sf_crcount = 0;
1817 mld_ifc_event(pmc->idev);
1818 } else if (sf_setstate(pmc) || changerec)
1819 mld_ifc_event(pmc->idev);
1820 spin_unlock_bh(&pmc->mca_lock);
1821 read_unlock_bh(&idev->lock);
1826 * Add multicast single-source filter to the interface list
1828 static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
1829 struct in6_addr *psfsrc, int delta)
1831 struct ip6_sf_list *psf, *psf_prev;
1834 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1835 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1840 psf = (struct ip6_sf_list *)kmalloc(sizeof(*psf), GFP_ATOMIC);
1843 memset(psf, 0, sizeof(*psf));
1844 psf->sf_addr = *psfsrc;
1846 psf_prev->sf_next = psf;
1848 pmc->mca_sources = psf;
1850 psf->sf_count[sfmode]++;
1854 static void sf_markstate(struct ifmcaddr6 *pmc)
1856 struct ip6_sf_list *psf;
1857 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1859 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
1860 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1861 psf->sf_oldin = mca_xcount ==
1862 psf->sf_count[MCAST_EXCLUDE] &&
1863 !psf->sf_count[MCAST_INCLUDE];
1865 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
1868 static int sf_setstate(struct ifmcaddr6 *pmc)
1870 struct ip6_sf_list *psf;
1871 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1872 int qrv = pmc->idev->mc_qrv;
1876 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1877 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1878 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
1879 !psf->sf_count[MCAST_INCLUDE];
1881 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
1882 if (new_in != psf->sf_oldin) {
1883 psf->sf_crcount = qrv;
1891 * Add multicast source filter list to the interface list
1893 static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca,
1894 int sfmode, int sfcount, struct in6_addr *psfsrc,
1897 struct ifmcaddr6 *pmc;
1903 read_lock_bh(&idev->lock);
1904 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1905 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
1909 /* MCA not found?? bug */
1910 read_unlock_bh(&idev->lock);
1913 spin_lock_bh(&pmc->mca_lock);
1916 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
1918 pmc->mca_sfcount[sfmode]++;
1920 for (i=0; i<sfcount; i++) {
1921 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta);
1929 pmc->mca_sfcount[sfmode]--;
1931 (void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
1932 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
1933 struct inet6_dev *idev = pmc->idev;
1934 struct ip6_sf_list *psf;
1936 /* filter mode change */
1937 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1938 pmc->mca_sfmode = MCAST_EXCLUDE;
1939 else if (pmc->mca_sfcount[MCAST_INCLUDE])
1940 pmc->mca_sfmode = MCAST_INCLUDE;
1941 /* else no filters; keep old mode for reports */
1943 pmc->mca_crcount = idev->mc_qrv;
1944 idev->mc_ifc_count = pmc->mca_crcount;
1945 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
1946 psf->sf_crcount = 0;
1947 mld_ifc_event(idev);
1948 } else if (sf_setstate(pmc))
1949 mld_ifc_event(idev);
1950 spin_unlock_bh(&pmc->mca_lock);
1951 read_unlock_bh(&idev->lock);
1955 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
1957 struct ip6_sf_list *psf, *nextpsf;
1959 for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
1960 nextpsf = psf->sf_next;
1963 pmc->mca_tomb = NULL;
1964 for (psf=pmc->mca_sources; psf; psf=nextpsf) {
1965 nextpsf = psf->sf_next;
1968 pmc->mca_sources = NULL;
1969 pmc->mca_sfmode = MCAST_EXCLUDE;
1970 pmc->mca_sfcount[MCAST_EXCLUDE] = 0;
1971 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
1975 static void igmp6_join_group(struct ifmcaddr6 *ma)
1977 unsigned long delay;
1979 if (ma->mca_flags & MAF_NOREPORT)
1982 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
1984 delay = net_random() % IGMP6_UNSOLICITED_IVAL;
1986 spin_lock_bh(&ma->mca_lock);
1987 if (del_timer(&ma->mca_timer)) {
1988 atomic_dec(&ma->mca_refcnt);
1989 delay = ma->mca_timer.expires - jiffies;
1992 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1993 atomic_inc(&ma->mca_refcnt);
1994 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
1995 spin_unlock_bh(&ma->mca_lock);
1998 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
1999 struct inet6_dev *idev)
2003 if (iml->sflist == 0) {
2004 /* any-source empty exclude case */
2005 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
2007 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
2008 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
2009 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
2014 static void igmp6_leave_group(struct ifmcaddr6 *ma)
2016 if (MLD_V1_SEEN(ma->idev)) {
2017 if (ma->mca_flags & MAF_LAST_REPORTER)
2018 igmp6_send(&ma->mca_addr, ma->idev->dev,
2019 ICMPV6_MGM_REDUCTION);
2021 mld_add_delrec(ma->idev, ma);
2022 mld_ifc_event(ma->idev);
2026 static void mld_gq_timer_expire(unsigned long data)
2028 struct inet6_dev *idev = (struct inet6_dev *)data;
2030 idev->mc_gq_running = 0;
2031 mld_send_report(idev, NULL);
2032 __in6_dev_put(idev);
2035 static void mld_ifc_timer_expire(unsigned long data)
2037 struct inet6_dev *idev = (struct inet6_dev *)data;
2040 if (idev->mc_ifc_count) {
2041 idev->mc_ifc_count--;
2042 if (idev->mc_ifc_count)
2043 mld_ifc_start_timer(idev, idev->mc_maxdelay);
2045 __in6_dev_put(idev);
2048 static void mld_ifc_event(struct inet6_dev *idev)
2050 if (MLD_V1_SEEN(idev))
2052 idev->mc_ifc_count = idev->mc_qrv;
2053 mld_ifc_start_timer(idev, 1);
2057 static void igmp6_timer_handler(unsigned long data)
2059 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
2061 if (MLD_V1_SEEN(ma->idev))
2062 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2064 mld_send_report(ma->idev, ma);
2066 spin_lock(&ma->mca_lock);
2067 ma->mca_flags |= MAF_LAST_REPORTER;
2068 ma->mca_flags &= ~MAF_TIMER_RUNNING;
2069 spin_unlock(&ma->mca_lock);
2073 /* Device going down */
2075 void ipv6_mc_down(struct inet6_dev *idev)
2077 struct ifmcaddr6 *i;
2079 /* Withdraw multicast list */
2081 read_lock_bh(&idev->lock);
2082 idev->mc_ifc_count = 0;
2083 if (del_timer(&idev->mc_ifc_timer))
2084 __in6_dev_put(idev);
2085 idev->mc_gq_running = 0;
2086 if (del_timer(&idev->mc_gq_timer))
2087 __in6_dev_put(idev);
2089 for (i = idev->mc_list; i; i=i->next)
2090 igmp6_group_dropped(i);
2091 read_unlock_bh(&idev->lock);
2093 mld_clear_delrec(idev);
2097 /* Device going up */
2099 void ipv6_mc_up(struct inet6_dev *idev)
2101 struct ifmcaddr6 *i;
2103 /* Install multicast list, except for all-nodes (already installed) */
2105 read_lock_bh(&idev->lock);
2106 for (i = idev->mc_list; i; i=i->next)
2107 igmp6_group_added(i);
2108 read_unlock_bh(&idev->lock);
2111 /* IPv6 device initialization. */
2113 void ipv6_mc_init_dev(struct inet6_dev *idev)
2115 struct in6_addr maddr;
2117 write_lock_bh(&idev->lock);
2118 rwlock_init(&idev->mc_lock);
2119 idev->mc_gq_running = 0;
2120 init_timer(&idev->mc_gq_timer);
2121 idev->mc_gq_timer.data = (unsigned long) idev;
2122 idev->mc_gq_timer.function = &mld_gq_timer_expire;
2123 idev->mc_tomb = NULL;
2124 idev->mc_ifc_count = 0;
2125 init_timer(&idev->mc_ifc_timer);
2126 idev->mc_ifc_timer.data = (unsigned long) idev;
2127 idev->mc_ifc_timer.function = &mld_ifc_timer_expire;
2128 idev->mc_qrv = MLD_QRV_DEFAULT;
2129 idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL;
2130 idev->mc_v1_seen = 0;
2131 write_unlock_bh(&idev->lock);
2133 /* Add all-nodes address. */
2134 ipv6_addr_all_nodes(&maddr);
2135 ipv6_dev_mc_inc(idev->dev, &maddr);
2139 * Device is about to be destroyed: clean up.
2142 void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2144 struct ifmcaddr6 *i;
2145 struct in6_addr maddr;
2147 /* Deactivate timers */
2150 /* Delete all-nodes address. */
2151 ipv6_addr_all_nodes(&maddr);
2153 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2154 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2157 __ipv6_dev_mc_dec(idev, &maddr);
2159 if (idev->cnf.forwarding) {
2160 ipv6_addr_all_routers(&maddr);
2161 __ipv6_dev_mc_dec(idev, &maddr);
2164 write_lock_bh(&idev->lock);
2165 while ((i = idev->mc_list) != NULL) {
2166 idev->mc_list = i->next;
2167 write_unlock_bh(&idev->lock);
2169 igmp6_group_dropped(i);
2172 write_lock_bh(&idev->lock);
2174 write_unlock_bh(&idev->lock);
2177 #ifdef CONFIG_PROC_FS
2178 struct igmp6_mc_iter_state {
2179 struct net_device *dev;
2180 struct inet6_dev *idev;
2183 #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2185 static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
2187 struct ifmcaddr6 *im = NULL;
2188 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2190 for (state->dev = dev_base, state->idev = NULL;
2192 state->dev = state->dev->next) {
2193 struct inet6_dev *idev;
2194 idev = in6_dev_get(state->dev);
2197 read_lock_bh(&idev->lock);
2203 read_unlock_bh(&idev->lock);
2209 static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
2211 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);
2219 state->dev = state->dev->next;
2224 state->idev = in6_dev_get(state->dev);
2227 read_lock_bh(&state->idev->lock);
2228 im = state->idev->mc_list;
2233 static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2235 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2237 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2239 return pos ? NULL : im;
2242 static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
2244 read_lock(&dev_base_lock);
2245 return igmp6_mc_get_idx(seq, *pos);
2248 static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2250 struct ifmcaddr6 *im;
2251 im = igmp6_mc_get_next(seq, v);
2256 static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
2258 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2259 if (likely(state->idev != NULL)) {
2260 read_unlock_bh(&state->idev->lock);
2261 in6_dev_put(state->idev);
2265 read_unlock(&dev_base_lock);
2268 static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
2270 struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
2271 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2274 "%-4d %-15s %04x%04x%04x%04x%04x%04x%04x%04x %5d %08X %ld\n",
2275 state->dev->ifindex, state->dev->name,
2277 im->mca_users, im->mca_flags,
2278 (im->mca_flags&MAF_TIMER_RUNNING) ?
2279 jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
2283 static struct seq_operations igmp6_mc_seq_ops = {
2284 .start = igmp6_mc_seq_start,
2285 .next = igmp6_mc_seq_next,
2286 .stop = igmp6_mc_seq_stop,
2287 .show = igmp6_mc_seq_show,
2290 static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
2292 struct seq_file *seq;
2294 struct igmp6_mc_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
2299 rc = seq_open(file, &igmp6_mc_seq_ops);
2303 seq = file->private_data;
2305 memset(s, 0, sizeof(*s));
2313 static struct file_operations igmp6_mc_seq_fops = {
2314 .owner = THIS_MODULE,
2315 .open = igmp6_mc_seq_open,
2317 .llseek = seq_lseek,
2318 .release = seq_release_private,
2321 struct igmp6_mcf_iter_state {
2322 struct net_device *dev;
2323 struct inet6_dev *idev;
2324 struct ifmcaddr6 *im;
2327 #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2329 static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
2331 struct ip6_sf_list *psf = NULL;
2332 struct ifmcaddr6 *im = NULL;
2333 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2335 for (state->dev = dev_base, state->idev = NULL, state->im = NULL;
2337 state->dev = state->dev->next) {
2338 struct inet6_dev *idev;
2339 idev = in6_dev_get(state->dev);
2340 if (unlikely(idev == NULL))
2342 read_lock_bh(&idev->lock);
2344 if (likely(im != NULL)) {
2345 spin_lock_bh(&im->mca_lock);
2346 psf = im->mca_sources;
2347 if (likely(psf != NULL)) {
2352 spin_unlock_bh(&im->mca_lock);
2354 read_unlock_bh(&idev->lock);
2360 static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
2362 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2366 spin_unlock_bh(&state->im->mca_lock);
2367 state->im = state->im->next;
2368 while (!state->im) {
2369 if (likely(state->idev != NULL)) {
2370 read_unlock_bh(&state->idev->lock);
2371 in6_dev_put(state->idev);
2373 state->dev = state->dev->next;
2378 state->idev = in6_dev_get(state->dev);
2381 read_lock_bh(&state->idev->lock);
2382 state->im = state->idev->mc_list;
2386 spin_lock_bh(&state->im->mca_lock);
2387 psf = state->im->mca_sources;
2393 static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2395 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2397 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2399 return pos ? NULL : psf;
2402 static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
2404 read_lock(&dev_base_lock);
2405 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2408 static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2410 struct ip6_sf_list *psf;
2411 if (v == SEQ_START_TOKEN)
2412 psf = igmp6_mcf_get_first(seq);
2414 psf = igmp6_mcf_get_next(seq, v);
2419 static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
2421 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2422 if (likely(state->im != NULL)) {
2423 spin_unlock_bh(&state->im->mca_lock);
2426 if (likely(state->idev != NULL)) {
2427 read_unlock_bh(&state->idev->lock);
2428 in6_dev_put(state->idev);
2432 read_unlock(&dev_base_lock);
2435 static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
2437 struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
2438 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2440 if (v == SEQ_START_TOKEN) {
2443 "%32s %32s %6s %6s\n", "Idx",
2444 "Device", "Multicast Address",
2445 "Source Address", "INC", "EXC");
2449 "%04x%04x%04x%04x%04x%04x%04x%04x "
2450 "%04x%04x%04x%04x%04x%04x%04x%04x "
2452 state->dev->ifindex, state->dev->name,
2453 NIP6(state->im->mca_addr),
2455 psf->sf_count[MCAST_INCLUDE],
2456 psf->sf_count[MCAST_EXCLUDE]);
2461 static struct seq_operations igmp6_mcf_seq_ops = {
2462 .start = igmp6_mcf_seq_start,
2463 .next = igmp6_mcf_seq_next,
2464 .stop = igmp6_mcf_seq_stop,
2465 .show = igmp6_mcf_seq_show,
2468 static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
2470 struct seq_file *seq;
2472 struct igmp6_mcf_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL);
2477 rc = seq_open(file, &igmp6_mcf_seq_ops);
2481 seq = file->private_data;
2483 memset(s, 0, sizeof(*s));
2491 static struct file_operations igmp6_mcf_seq_fops = {
2492 .owner = THIS_MODULE,
2493 .open = igmp6_mcf_seq_open,
2495 .llseek = seq_lseek,
2496 .release = seq_release_private,
2500 int __init igmp6_init(struct net_proto_family *ops)
2502 struct ipv6_pinfo *np;
2506 err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, &igmp6_socket);
2509 "Failed to initialize the IGMP6 control socket (err %d).\n",
2511 igmp6_socket = NULL; /* For safety. */
2515 sk = igmp6_socket->sk;
2516 sk->sk_allocation = GFP_ATOMIC;
2517 sk->sk_prot->unhash(sk);
2522 #ifdef CONFIG_PROC_FS
2523 proc_net_fops_create("igmp6", S_IRUGO, &igmp6_mc_seq_fops);
2524 proc_net_fops_create("mcfilter6", S_IRUGO, &igmp6_mcf_seq_fops);
2530 void igmp6_cleanup(void)
2532 sock_release(igmp6_socket);
2533 igmp6_socket = NULL; /* for safety */
2535 #ifdef CONFIG_PROC_FS
2536 proc_net_remove("mcfilter6");
2537 proc_net_remove("igmp6");