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/module.h>
32 #include <linux/errno.h>
33 #include <linux/types.h>
34 #include <linux/string.h>
35 #include <linux/socket.h>
36 #include <linux/sockios.h>
37 #include <linux/jiffies.h>
38 #include <linux/times.h>
39 #include <linux/net.h>
41 #include <linux/in6.h>
42 #include <linux/netdevice.h>
43 #include <linux/if_arp.h>
44 #include <linux/route.h>
45 #include <linux/init.h>
46 #include <linux/proc_fs.h>
47 #include <linux/seq_file.h>
49 #include <linux/netfilter.h>
50 #include <linux/netfilter_ipv6.h>
52 #include <net/net_namespace.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))) << \
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 64
175 int sysctl_mld_max_msf __read_mostly = 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(&init_net, ifindex);
221 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
225 mc_lst->ifindex = dev->ifindex;
226 mc_lst->sfmode = MCAST_EXCLUDE;
227 rwlock_init(&mc_lst->sflock);
228 mc_lst->sflist = NULL;
231 * now add/increase the group membership on the device
234 err = ipv6_dev_mc_inc(dev, addr);
237 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
242 write_lock_bh(&ipv6_sk_mc_lock);
243 mc_lst->next = np->ipv6_mc_list;
244 np->ipv6_mc_list = mc_lst;
245 write_unlock_bh(&ipv6_sk_mc_lock);
253 * socket leave on multicast group
255 int ipv6_sock_mc_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
257 struct ipv6_pinfo *np = inet6_sk(sk);
258 struct ipv6_mc_socklist *mc_lst, **lnk;
260 write_lock_bh(&ipv6_sk_mc_lock);
261 for (lnk = &np->ipv6_mc_list; (mc_lst = *lnk) !=NULL ; lnk = &mc_lst->next) {
262 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
263 ipv6_addr_equal(&mc_lst->addr, addr)) {
264 struct net_device *dev;
267 write_unlock_bh(&ipv6_sk_mc_lock);
269 if ((dev = dev_get_by_index(&init_net, mc_lst->ifindex)) != NULL) {
270 struct inet6_dev *idev = in6_dev_get(dev);
272 (void) ip6_mc_leave_src(sk, mc_lst, idev);
274 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
279 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
280 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
284 write_unlock_bh(&ipv6_sk_mc_lock);
286 return -EADDRNOTAVAIL;
289 static struct inet6_dev *ip6_mc_find_dev(struct in6_addr *group, int ifindex)
291 struct net_device *dev = NULL;
292 struct inet6_dev *idev = NULL;
297 rt = rt6_lookup(group, NULL, 0, 0);
301 dst_release(&rt->u.dst);
304 dev = dev_get_by_index(&init_net, ifindex);
308 idev = in6_dev_get(dev);
313 read_lock_bh(&idev->lock);
315 read_unlock_bh(&idev->lock);
323 void ipv6_sock_mc_close(struct sock *sk)
325 struct ipv6_pinfo *np = inet6_sk(sk);
326 struct ipv6_mc_socklist *mc_lst;
328 write_lock_bh(&ipv6_sk_mc_lock);
329 while ((mc_lst = np->ipv6_mc_list) != NULL) {
330 struct net_device *dev;
332 np->ipv6_mc_list = mc_lst->next;
333 write_unlock_bh(&ipv6_sk_mc_lock);
335 dev = dev_get_by_index(&init_net, mc_lst->ifindex);
337 struct inet6_dev *idev = in6_dev_get(dev);
339 (void) ip6_mc_leave_src(sk, mc_lst, idev);
341 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
346 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
348 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
350 write_lock_bh(&ipv6_sk_mc_lock);
352 write_unlock_bh(&ipv6_sk_mc_lock);
355 int ip6_mc_source(int add, int omode, struct sock *sk,
356 struct group_source_req *pgsr)
358 struct in6_addr *source, *group;
359 struct ipv6_mc_socklist *pmc;
360 struct net_device *dev;
361 struct inet6_dev *idev;
362 struct ipv6_pinfo *inet6 = inet6_sk(sk);
363 struct ip6_sf_socklist *psl;
369 if (pgsr->gsr_group.ss_family != AF_INET6 ||
370 pgsr->gsr_source.ss_family != AF_INET6)
373 source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
374 group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
376 if (!ipv6_addr_is_multicast(group))
379 idev = ip6_mc_find_dev(group, pgsr->gsr_interface);
384 err = -EADDRNOTAVAIL;
386 read_lock_bh(&ipv6_sk_mc_lock);
387 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
388 if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
390 if (ipv6_addr_equal(&pmc->addr, group))
393 if (!pmc) { /* must have a prior join */
397 /* if a source filter was set, must be the same mode as before */
399 if (pmc->sfmode != omode) {
403 } else if (pmc->sfmode != omode) {
404 /* allow mode switches for empty-set filters */
405 ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
406 ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
410 write_lock_bh(&pmc->sflock);
416 goto done; /* err = -EADDRNOTAVAIL */
418 for (i=0; i<psl->sl_count; i++) {
419 rv = memcmp(&psl->sl_addr[i], source,
420 sizeof(struct in6_addr));
424 if (rv) /* source not found */
425 goto done; /* err = -EADDRNOTAVAIL */
427 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
428 if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
433 /* update the interface filter */
434 ip6_mc_del_src(idev, group, omode, 1, source, 1);
436 for (j=i+1; j<psl->sl_count; j++)
437 psl->sl_addr[j-1] = psl->sl_addr[j];
442 /* else, add a new source to the filter */
444 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
448 if (!psl || psl->sl_count == psl->sl_max) {
449 struct ip6_sf_socklist *newpsl;
450 int count = IP6_SFBLOCK;
453 count += psl->sl_max;
454 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
459 newpsl->sl_max = count;
460 newpsl->sl_count = count - IP6_SFBLOCK;
462 for (i=0; i<psl->sl_count; i++)
463 newpsl->sl_addr[i] = psl->sl_addr[i];
464 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
466 pmc->sflist = psl = newpsl;
468 rv = 1; /* > 0 for insert logic below if sl_count is 0 */
469 for (i=0; i<psl->sl_count; i++) {
470 rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr));
474 if (rv == 0) /* address already there is an error */
476 for (j=psl->sl_count-1; j>=i; j--)
477 psl->sl_addr[j+1] = psl->sl_addr[j];
478 psl->sl_addr[i] = *source;
481 /* update the interface list */
482 ip6_mc_add_src(idev, group, omode, 1, source, 1);
485 write_unlock_bh(&pmc->sflock);
486 read_unlock_bh(&ipv6_sk_mc_lock);
487 read_unlock_bh(&idev->lock);
491 return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
495 int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
497 struct in6_addr *group;
498 struct ipv6_mc_socklist *pmc;
499 struct net_device *dev;
500 struct inet6_dev *idev;
501 struct ipv6_pinfo *inet6 = inet6_sk(sk);
502 struct ip6_sf_socklist *newpsl, *psl;
506 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
508 if (!ipv6_addr_is_multicast(group))
510 if (gsf->gf_fmode != MCAST_INCLUDE &&
511 gsf->gf_fmode != MCAST_EXCLUDE)
514 idev = ip6_mc_find_dev(group, gsf->gf_interface);
521 read_lock_bh(&ipv6_sk_mc_lock);
523 if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
528 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
529 if (pmc->ifindex != gsf->gf_interface)
531 if (ipv6_addr_equal(&pmc->addr, group))
534 if (!pmc) { /* must have a prior join */
538 if (gsf->gf_numsrc) {
539 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
545 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
546 for (i=0; i<newpsl->sl_count; ++i) {
547 struct sockaddr_in6 *psin6;
549 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
550 newpsl->sl_addr[i] = psin6->sin6_addr;
552 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
553 newpsl->sl_count, newpsl->sl_addr, 0);
555 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
560 (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
563 write_lock_bh(&pmc->sflock);
566 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
567 psl->sl_count, psl->sl_addr, 0);
568 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
570 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
571 pmc->sflist = newpsl;
572 pmc->sfmode = gsf->gf_fmode;
573 write_unlock_bh(&pmc->sflock);
576 read_unlock_bh(&ipv6_sk_mc_lock);
577 read_unlock_bh(&idev->lock);
581 err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
585 int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
586 struct group_filter __user *optval, int __user *optlen)
588 int err, i, count, copycount;
589 struct in6_addr *group;
590 struct ipv6_mc_socklist *pmc;
591 struct inet6_dev *idev;
592 struct net_device *dev;
593 struct ipv6_pinfo *inet6 = inet6_sk(sk);
594 struct ip6_sf_socklist *psl;
596 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
598 if (!ipv6_addr_is_multicast(group))
601 idev = ip6_mc_find_dev(group, gsf->gf_interface);
608 err = -EADDRNOTAVAIL;
610 * changes to the ipv6_mc_list require the socket lock and
611 * a read lock on ip6_sk_mc_lock. We have the socket lock,
612 * so reading the list is safe.
615 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
616 if (pmc->ifindex != gsf->gf_interface)
618 if (ipv6_addr_equal(group, &pmc->addr))
621 if (!pmc) /* must have a prior join */
623 gsf->gf_fmode = pmc->sfmode;
625 count = psl ? psl->sl_count : 0;
626 read_unlock_bh(&idev->lock);
630 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
631 gsf->gf_numsrc = count;
632 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
633 copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
636 /* changes to psl require the socket lock, a read lock on
637 * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We
638 * have the socket lock, so reading here is safe.
640 for (i=0; i<copycount; i++) {
641 struct sockaddr_in6 *psin6;
642 struct sockaddr_storage ss;
644 psin6 = (struct sockaddr_in6 *)&ss;
645 memset(&ss, 0, sizeof(ss));
646 psin6->sin6_family = AF_INET6;
647 psin6->sin6_addr = psl->sl_addr[i];
648 if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
653 read_unlock_bh(&idev->lock);
659 int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr,
660 struct in6_addr *src_addr)
662 struct ipv6_pinfo *np = inet6_sk(sk);
663 struct ipv6_mc_socklist *mc;
664 struct ip6_sf_socklist *psl;
667 read_lock(&ipv6_sk_mc_lock);
668 for (mc = np->ipv6_mc_list; mc; mc = mc->next) {
669 if (ipv6_addr_equal(&mc->addr, mc_addr))
673 read_unlock(&ipv6_sk_mc_lock);
676 read_lock(&mc->sflock);
679 rv = mc->sfmode == MCAST_EXCLUDE;
683 for (i=0; i<psl->sl_count; i++) {
684 if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
687 if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
689 if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
692 read_unlock(&mc->sflock);
693 read_unlock(&ipv6_sk_mc_lock);
698 static void ma_put(struct ifmcaddr6 *mc)
700 if (atomic_dec_and_test(&mc->mca_refcnt)) {
701 in6_dev_put(mc->idev);
706 static void igmp6_group_added(struct ifmcaddr6 *mc)
708 struct net_device *dev = mc->idev->dev;
709 char buf[MAX_ADDR_LEN];
711 spin_lock_bh(&mc->mca_lock);
712 if (!(mc->mca_flags&MAF_LOADED)) {
713 mc->mca_flags |= MAF_LOADED;
714 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
715 dev_mc_add(dev, buf, dev->addr_len, 0);
717 spin_unlock_bh(&mc->mca_lock);
719 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
722 if (MLD_V1_SEEN(mc->idev)) {
723 igmp6_join_group(mc);
728 mc->mca_crcount = mc->idev->mc_qrv;
729 mld_ifc_event(mc->idev);
732 static void igmp6_group_dropped(struct ifmcaddr6 *mc)
734 struct net_device *dev = mc->idev->dev;
735 char buf[MAX_ADDR_LEN];
737 spin_lock_bh(&mc->mca_lock);
738 if (mc->mca_flags&MAF_LOADED) {
739 mc->mca_flags &= ~MAF_LOADED;
740 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
741 dev_mc_delete(dev, buf, dev->addr_len, 0);
744 if (mc->mca_flags & MAF_NOREPORT)
746 spin_unlock_bh(&mc->mca_lock);
749 igmp6_leave_group(mc);
751 spin_lock_bh(&mc->mca_lock);
752 if (del_timer(&mc->mca_timer))
753 atomic_dec(&mc->mca_refcnt);
755 ip6_mc_clear_src(mc);
756 spin_unlock_bh(&mc->mca_lock);
760 * deleted ifmcaddr6 manipulation
762 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
764 struct ifmcaddr6 *pmc;
766 /* this is an "ifmcaddr6" for convenience; only the fields below
767 * are actually used. In particular, the refcnt and users are not
768 * used for management of the delete list. Using the same structure
769 * for deleted items allows change reports to use common code with
770 * non-deleted or query-response MCA's.
772 pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC);
776 spin_lock_bh(&im->mca_lock);
777 spin_lock_init(&pmc->mca_lock);
778 pmc->idev = im->idev;
780 pmc->mca_addr = im->mca_addr;
781 pmc->mca_crcount = idev->mc_qrv;
782 pmc->mca_sfmode = im->mca_sfmode;
783 if (pmc->mca_sfmode == MCAST_INCLUDE) {
784 struct ip6_sf_list *psf;
786 pmc->mca_tomb = im->mca_tomb;
787 pmc->mca_sources = im->mca_sources;
788 im->mca_tomb = im->mca_sources = NULL;
789 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
790 psf->sf_crcount = pmc->mca_crcount;
792 spin_unlock_bh(&im->mca_lock);
794 write_lock_bh(&idev->mc_lock);
795 pmc->next = idev->mc_tomb;
797 write_unlock_bh(&idev->mc_lock);
800 static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca)
802 struct ifmcaddr6 *pmc, *pmc_prev;
803 struct ip6_sf_list *psf, *psf_next;
805 write_lock_bh(&idev->mc_lock);
807 for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
808 if (ipv6_addr_equal(&pmc->mca_addr, pmca))
814 pmc_prev->next = pmc->next;
816 idev->mc_tomb = pmc->next;
818 write_unlock_bh(&idev->mc_lock);
820 for (psf=pmc->mca_tomb; psf; psf=psf_next) {
821 psf_next = psf->sf_next;
824 in6_dev_put(pmc->idev);
829 static void mld_clear_delrec(struct inet6_dev *idev)
831 struct ifmcaddr6 *pmc, *nextpmc;
833 write_lock_bh(&idev->mc_lock);
835 idev->mc_tomb = NULL;
836 write_unlock_bh(&idev->mc_lock);
838 for (; pmc; pmc = nextpmc) {
840 ip6_mc_clear_src(pmc);
841 in6_dev_put(pmc->idev);
845 /* clear dead sources, too */
846 read_lock_bh(&idev->lock);
847 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
848 struct ip6_sf_list *psf, *psf_next;
850 spin_lock_bh(&pmc->mca_lock);
852 pmc->mca_tomb = NULL;
853 spin_unlock_bh(&pmc->mca_lock);
854 for (; psf; psf=psf_next) {
855 psf_next = psf->sf_next;
859 read_unlock_bh(&idev->lock);
864 * device multicast group inc (add if not found)
866 int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr)
868 struct ifmcaddr6 *mc;
869 struct inet6_dev *idev;
871 idev = in6_dev_get(dev);
876 write_lock_bh(&idev->lock);
878 write_unlock_bh(&idev->lock);
883 for (mc = idev->mc_list; mc; mc = mc->next) {
884 if (ipv6_addr_equal(&mc->mca_addr, addr)) {
886 write_unlock_bh(&idev->lock);
887 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
895 * not found: create a new one.
898 mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
901 write_unlock_bh(&idev->lock);
906 init_timer(&mc->mca_timer);
907 mc->mca_timer.function = igmp6_timer_handler;
908 mc->mca_timer.data = (unsigned long) mc;
910 ipv6_addr_copy(&mc->mca_addr, addr);
913 /* mca_stamp should be updated upon changes */
914 mc->mca_cstamp = mc->mca_tstamp = jiffies;
915 atomic_set(&mc->mca_refcnt, 2);
916 spin_lock_init(&mc->mca_lock);
918 /* initial mode is (EX, empty) */
919 mc->mca_sfmode = MCAST_EXCLUDE;
920 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
922 if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
923 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
924 mc->mca_flags |= MAF_NOREPORT;
926 mc->next = idev->mc_list;
928 write_unlock_bh(&idev->lock);
930 mld_del_delrec(idev, &mc->mca_addr);
931 igmp6_group_added(mc);
937 * device multicast group del
939 int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr)
941 struct ifmcaddr6 *ma, **map;
943 write_lock_bh(&idev->lock);
944 for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
945 if (ipv6_addr_equal(&ma->mca_addr, addr)) {
946 if (--ma->mca_users == 0) {
948 write_unlock_bh(&idev->lock);
950 igmp6_group_dropped(ma);
955 write_unlock_bh(&idev->lock);
959 write_unlock_bh(&idev->lock);
964 int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr)
966 struct inet6_dev *idev = in6_dev_get(dev);
972 err = __ipv6_dev_mc_dec(idev, addr);
980 * identify MLD packets for MLD filter exceptions
982 int ipv6_is_mld(struct sk_buff *skb, int nexthdr)
984 struct icmp6hdr *pic;
986 if (nexthdr != IPPROTO_ICMPV6)
989 if (!pskb_may_pull(skb, sizeof(struct icmp6hdr)))
992 pic = icmp6_hdr(skb);
994 switch (pic->icmp6_type) {
995 case ICMPV6_MGM_QUERY:
996 case ICMPV6_MGM_REPORT:
997 case ICMPV6_MGM_REDUCTION:
998 case ICMPV6_MLD2_REPORT:
1007 * check if the interface/address pair is valid
1009 int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group,
1010 struct in6_addr *src_addr)
1012 struct inet6_dev *idev;
1013 struct ifmcaddr6 *mc;
1016 idev = in6_dev_get(dev);
1018 read_lock_bh(&idev->lock);
1019 for (mc = idev->mc_list; mc; mc=mc->next) {
1020 if (ipv6_addr_equal(&mc->mca_addr, group))
1024 if (src_addr && !ipv6_addr_any(src_addr)) {
1025 struct ip6_sf_list *psf;
1027 spin_lock_bh(&mc->mca_lock);
1028 for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
1029 if (ipv6_addr_equal(&psf->sf_addr, src_addr))
1033 rv = psf->sf_count[MCAST_INCLUDE] ||
1034 psf->sf_count[MCAST_EXCLUDE] !=
1035 mc->mca_sfcount[MCAST_EXCLUDE];
1037 rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0;
1038 spin_unlock_bh(&mc->mca_lock);
1040 rv = 1; /* don't filter unspecified source */
1042 read_unlock_bh(&idev->lock);
1048 static void mld_gq_start_timer(struct inet6_dev *idev)
1050 int tv = net_random() % idev->mc_maxdelay;
1052 idev->mc_gq_running = 1;
1053 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
1057 static void mld_ifc_start_timer(struct inet6_dev *idev, int delay)
1059 int tv = net_random() % delay;
1061 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
1066 * IGMP handling (alias multicast ICMPv6 messages)
1069 static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
1071 unsigned long delay = resptime;
1073 /* Do not start timer for these addresses */
1074 if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
1075 IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
1078 if (del_timer(&ma->mca_timer)) {
1079 atomic_dec(&ma->mca_refcnt);
1080 delay = ma->mca_timer.expires - jiffies;
1083 if (delay >= resptime) {
1085 delay = net_random() % resptime;
1089 ma->mca_timer.expires = jiffies + delay;
1090 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1091 atomic_inc(&ma->mca_refcnt);
1092 ma->mca_flags |= MAF_TIMER_RUNNING;
1095 /* mark EXCLUDE-mode sources */
1096 static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
1097 struct in6_addr *srcs)
1099 struct ip6_sf_list *psf;
1103 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1104 if (scount == nsrcs)
1106 for (i=0; i<nsrcs; i++) {
1107 /* skip inactive filters */
1108 if (pmc->mca_sfcount[MCAST_INCLUDE] ||
1109 pmc->mca_sfcount[MCAST_EXCLUDE] !=
1110 psf->sf_count[MCAST_EXCLUDE])
1112 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1118 pmc->mca_flags &= ~MAF_GSQUERY;
1119 if (scount == nsrcs) /* all sources excluded */
1124 static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
1125 struct in6_addr *srcs)
1127 struct ip6_sf_list *psf;
1130 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1131 return mld_xmarksources(pmc, nsrcs, srcs);
1133 /* mark INCLUDE-mode sources */
1136 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1137 if (scount == nsrcs)
1139 for (i=0; i<nsrcs; i++) {
1140 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1148 pmc->mca_flags &= ~MAF_GSQUERY;
1151 pmc->mca_flags |= MAF_GSQUERY;
1155 int igmp6_event_query(struct sk_buff *skb)
1157 struct mld2_query *mlh2 = NULL;
1158 struct ifmcaddr6 *ma;
1159 struct in6_addr *group;
1160 unsigned long max_delay;
1161 struct inet6_dev *idev;
1162 struct icmp6hdr *hdr;
1167 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1170 /* compute payload length excluding extension headers */
1171 len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr);
1172 len -= skb_network_header_len(skb);
1174 /* Drop queries with not link local source */
1175 if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL))
1178 idev = in6_dev_get(skb->dev);
1183 hdr = icmp6_hdr(skb);
1184 group = (struct in6_addr *) (hdr + 1);
1185 group_type = ipv6_addr_type(group);
1187 if (group_type != IPV6_ADDR_ANY &&
1188 !(group_type&IPV6_ADDR_MULTICAST)) {
1195 /* MLDv1 router present */
1197 /* Translate milliseconds to jiffies */
1198 max_delay = (ntohs(hdr->icmp6_maxdelay)*HZ)/1000;
1200 switchback = (idev->mc_qrv + 1) * max_delay;
1201 idev->mc_v1_seen = jiffies + switchback;
1203 /* cancel the interface change timer */
1204 idev->mc_ifc_count = 0;
1205 if (del_timer(&idev->mc_ifc_timer))
1206 __in6_dev_put(idev);
1207 /* clear deleted report items */
1208 mld_clear_delrec(idev);
1209 } else if (len >= 28) {
1210 int srcs_offset = sizeof(struct mld2_query) -
1211 sizeof(struct icmp6hdr);
1212 if (!pskb_may_pull(skb, srcs_offset)) {
1216 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1217 max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000;
1220 idev->mc_maxdelay = max_delay;
1222 idev->mc_qrv = mlh2->qrv;
1223 if (group_type == IPV6_ADDR_ANY) { /* general query */
1226 return -EINVAL; /* no sources allowed */
1228 mld_gq_start_timer(idev);
1232 /* mark sources to include, if group & source-specific */
1233 if (mlh2->nsrcs != 0) {
1234 if (!pskb_may_pull(skb, srcs_offset +
1235 ntohs(mlh2->nsrcs) * sizeof(struct in6_addr))) {
1239 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1247 read_lock_bh(&idev->lock);
1248 if (group_type == IPV6_ADDR_ANY) {
1249 for (ma = idev->mc_list; ma; ma=ma->next) {
1250 spin_lock_bh(&ma->mca_lock);
1251 igmp6_group_queried(ma, max_delay);
1252 spin_unlock_bh(&ma->mca_lock);
1255 for (ma = idev->mc_list; ma; ma=ma->next) {
1256 if (!ipv6_addr_equal(group, &ma->mca_addr))
1258 spin_lock_bh(&ma->mca_lock);
1259 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1260 /* gsquery <- gsquery && mark */
1262 ma->mca_flags &= ~MAF_GSQUERY;
1264 /* gsquery <- mark */
1266 ma->mca_flags |= MAF_GSQUERY;
1268 ma->mca_flags &= ~MAF_GSQUERY;
1270 if (!(ma->mca_flags & MAF_GSQUERY) ||
1271 mld_marksources(ma, ntohs(mlh2->nsrcs), mlh2->srcs))
1272 igmp6_group_queried(ma, max_delay);
1273 spin_unlock_bh(&ma->mca_lock);
1277 read_unlock_bh(&idev->lock);
1284 int igmp6_event_report(struct sk_buff *skb)
1286 struct ifmcaddr6 *ma;
1287 struct in6_addr *addrp;
1288 struct inet6_dev *idev;
1289 struct icmp6hdr *hdr;
1292 /* Our own report looped back. Ignore it. */
1293 if (skb->pkt_type == PACKET_LOOPBACK)
1296 /* send our report if the MC router may not have heard this report */
1297 if (skb->pkt_type != PACKET_MULTICAST &&
1298 skb->pkt_type != PACKET_BROADCAST)
1301 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1304 hdr = icmp6_hdr(skb);
1306 /* Drop reports with not link local source */
1307 addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr);
1308 if (addr_type != IPV6_ADDR_ANY &&
1309 !(addr_type&IPV6_ADDR_LINKLOCAL))
1312 addrp = (struct in6_addr *) (hdr + 1);
1314 idev = in6_dev_get(skb->dev);
1319 * Cancel the timer for this group
1322 read_lock_bh(&idev->lock);
1323 for (ma = idev->mc_list; ma; ma=ma->next) {
1324 if (ipv6_addr_equal(&ma->mca_addr, addrp)) {
1325 spin_lock(&ma->mca_lock);
1326 if (del_timer(&ma->mca_timer))
1327 atomic_dec(&ma->mca_refcnt);
1328 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1329 spin_unlock(&ma->mca_lock);
1333 read_unlock_bh(&idev->lock);
1338 static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1339 int gdeleted, int sdeleted)
1342 case MLD2_MODE_IS_INCLUDE:
1343 case MLD2_MODE_IS_EXCLUDE:
1344 if (gdeleted || sdeleted)
1346 if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
1347 if (pmc->mca_sfmode == MCAST_INCLUDE)
1349 /* don't include if this source is excluded
1352 if (psf->sf_count[MCAST_INCLUDE])
1353 return type == MLD2_MODE_IS_INCLUDE;
1354 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1355 psf->sf_count[MCAST_EXCLUDE];
1358 case MLD2_CHANGE_TO_INCLUDE:
1359 if (gdeleted || sdeleted)
1361 return psf->sf_count[MCAST_INCLUDE] != 0;
1362 case MLD2_CHANGE_TO_EXCLUDE:
1363 if (gdeleted || sdeleted)
1365 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1366 psf->sf_count[MCAST_INCLUDE])
1368 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1369 psf->sf_count[MCAST_EXCLUDE];
1370 case MLD2_ALLOW_NEW_SOURCES:
1371 if (gdeleted || !psf->sf_crcount)
1373 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1374 case MLD2_BLOCK_OLD_SOURCES:
1375 if (pmc->mca_sfmode == MCAST_INCLUDE)
1376 return gdeleted || (psf->sf_crcount && sdeleted);
1377 return psf->sf_crcount && !gdeleted && !sdeleted;
1383 mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1385 struct ip6_sf_list *psf;
1388 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1389 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1396 static struct sk_buff *mld_newpack(struct net_device *dev, int size)
1398 struct sock *sk = igmp6_socket->sk;
1399 struct sk_buff *skb;
1400 struct mld2_report *pmr;
1401 struct in6_addr addr_buf;
1403 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1404 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1407 /* we assume size > sizeof(ra) here */
1408 skb = sock_alloc_send_skb(sk, size + LL_RESERVED_SPACE(dev), 1, &err);
1413 skb_reserve(skb, LL_RESERVED_SPACE(dev));
1415 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1416 /* <draft-ietf-magma-mld-source-05.txt>:
1417 * use unspecified address as the source address
1418 * when a valid link-local address is not available.
1420 memset(&addr_buf, 0, sizeof(addr_buf));
1423 ip6_nd_hdr(sk, skb, dev, &addr_buf, &mld2_all_mcr, NEXTHDR_HOP, 0);
1425 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1427 skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data);
1428 skb_put(skb, sizeof(*pmr));
1429 pmr = (struct mld2_report *)skb_transport_header(skb);
1430 pmr->type = ICMPV6_MLD2_REPORT;
1438 static inline int mld_dev_queue_xmit2(struct sk_buff *skb)
1440 struct net_device *dev = skb->dev;
1442 if (dev->hard_header) {
1443 unsigned char ha[MAX_ADDR_LEN];
1446 ndisc_mc_map(&ipv6_hdr(skb)->daddr, ha, dev, 1);
1447 err = dev->hard_header(skb, dev, ETH_P_IPV6, ha, NULL, skb->len);
1453 return dev_queue_xmit(skb);
1456 static inline int mld_dev_queue_xmit(struct sk_buff *skb)
1458 return NF_HOOK(PF_INET6, NF_IP6_POST_ROUTING, skb, NULL, skb->dev,
1459 mld_dev_queue_xmit2);
1462 static void mld_sendpack(struct sk_buff *skb)
1464 struct ipv6hdr *pip6 = ipv6_hdr(skb);
1465 struct mld2_report *pmr =
1466 (struct mld2_report *)skb_transport_header(skb);
1467 int payload_len, mldlen;
1468 struct inet6_dev *idev = in6_dev_get(skb->dev);
1471 IP6_INC_STATS(idev, IPSTATS_MIB_OUTREQUESTS);
1472 payload_len = (skb->tail - skb->network_header) - sizeof(*pip6);
1473 mldlen = skb->tail - skb->transport_header;
1474 pip6->payload_len = htons(payload_len);
1476 pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
1477 IPPROTO_ICMPV6, csum_partial(skb_transport_header(skb),
1479 err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev,
1480 mld_dev_queue_xmit);
1482 ICMP6MSGOUT_INC_STATS_BH(idev, ICMPV6_MLD2_REPORT);
1483 ICMP6_INC_STATS_BH(idev, ICMP6_MIB_OUTMSGS);
1484 IP6_INC_STATS_BH(idev, IPSTATS_MIB_OUTMCASTPKTS);
1486 IP6_INC_STATS_BH(idev, IPSTATS_MIB_OUTDISCARDS);
1488 if (likely(idev != NULL))
1492 static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
1494 return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel);
1497 static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1498 int type, struct mld2_grec **ppgr)
1500 struct net_device *dev = pmc->idev->dev;
1501 struct mld2_report *pmr;
1502 struct mld2_grec *pgr;
1505 skb = mld_newpack(dev, dev->mtu);
1508 pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
1509 pgr->grec_type = type;
1510 pgr->grec_auxwords = 0;
1511 pgr->grec_nsrcs = 0;
1512 pgr->grec_mca = pmc->mca_addr; /* structure copy */
1513 pmr = (struct mld2_report *)skb_transport_header(skb);
1514 pmr->ngrec = htons(ntohs(pmr->ngrec)+1);
1519 #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
1520 skb_tailroom(skb)) : 0)
1522 static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1523 int type, int gdeleted, int sdeleted)
1525 struct net_device *dev = pmc->idev->dev;
1526 struct mld2_report *pmr;
1527 struct mld2_grec *pgr = NULL;
1528 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
1529 int scount, stotal, first, isquery, truncate;
1531 if (pmc->mca_flags & MAF_NOREPORT)
1534 isquery = type == MLD2_MODE_IS_INCLUDE ||
1535 type == MLD2_MODE_IS_EXCLUDE;
1536 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1537 type == MLD2_CHANGE_TO_EXCLUDE;
1539 stotal = scount = 0;
1541 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1546 pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL;
1548 /* EX and TO_EX get a fresh packet, if needed */
1550 if (pmr && pmr->ngrec &&
1551 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1554 skb = mld_newpack(dev, dev->mtu);
1559 for (psf=*psf_list; psf; psf=psf_next) {
1560 struct in6_addr *psrc;
1562 psf_next = psf->sf_next;
1564 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1569 /* clear marks on query responses */
1573 if (AVAILABLE(skb) < sizeof(*psrc) +
1574 first*sizeof(struct mld2_grec)) {
1575 if (truncate && !first)
1576 break; /* truncate these */
1578 pgr->grec_nsrcs = htons(scount);
1581 skb = mld_newpack(dev, dev->mtu);
1586 skb = add_grhead(skb, pmc, type, &pgr);
1591 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1592 *psrc = psf->sf_addr;
1594 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1595 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1597 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1599 psf_prev->sf_next = psf->sf_next;
1601 *psf_list = psf->sf_next;
1611 if (type == MLD2_ALLOW_NEW_SOURCES ||
1612 type == MLD2_BLOCK_OLD_SOURCES)
1614 if (pmc->mca_crcount || isquery) {
1615 /* make sure we have room for group header */
1616 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
1618 skb = NULL; /* add_grhead will get a new one */
1620 skb = add_grhead(skb, pmc, type, &pgr);
1624 pgr->grec_nsrcs = htons(scount);
1627 pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
1631 static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1633 struct sk_buff *skb = NULL;
1637 read_lock_bh(&idev->lock);
1638 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1639 if (pmc->mca_flags & MAF_NOREPORT)
1641 spin_lock_bh(&pmc->mca_lock);
1642 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1643 type = MLD2_MODE_IS_EXCLUDE;
1645 type = MLD2_MODE_IS_INCLUDE;
1646 skb = add_grec(skb, pmc, type, 0, 0);
1647 spin_unlock_bh(&pmc->mca_lock);
1649 read_unlock_bh(&idev->lock);
1651 spin_lock_bh(&pmc->mca_lock);
1652 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1653 type = MLD2_MODE_IS_EXCLUDE;
1655 type = MLD2_MODE_IS_INCLUDE;
1656 skb = add_grec(skb, pmc, type, 0, 0);
1657 spin_unlock_bh(&pmc->mca_lock);
1664 * remove zero-count source records from a source filter list
1666 static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1668 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1671 for (psf=*ppsf; psf; psf = psf_next) {
1672 psf_next = psf->sf_next;
1673 if (psf->sf_crcount == 0) {
1675 psf_prev->sf_next = psf->sf_next;
1677 *ppsf = psf->sf_next;
1684 static void mld_send_cr(struct inet6_dev *idev)
1686 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1687 struct sk_buff *skb = NULL;
1690 read_lock_bh(&idev->lock);
1691 write_lock_bh(&idev->mc_lock);
1695 for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
1696 pmc_next = pmc->next;
1697 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1698 type = MLD2_BLOCK_OLD_SOURCES;
1699 dtype = MLD2_BLOCK_OLD_SOURCES;
1700 skb = add_grec(skb, pmc, type, 1, 0);
1701 skb = add_grec(skb, pmc, dtype, 1, 1);
1703 if (pmc->mca_crcount) {
1704 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1705 type = MLD2_CHANGE_TO_INCLUDE;
1706 skb = add_grec(skb, pmc, type, 1, 0);
1709 if (pmc->mca_crcount == 0) {
1710 mld_clear_zeros(&pmc->mca_tomb);
1711 mld_clear_zeros(&pmc->mca_sources);
1714 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1715 !pmc->mca_sources) {
1717 pmc_prev->next = pmc_next;
1719 idev->mc_tomb = pmc_next;
1720 in6_dev_put(pmc->idev);
1725 write_unlock_bh(&idev->mc_lock);
1728 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1729 spin_lock_bh(&pmc->mca_lock);
1730 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1731 type = MLD2_BLOCK_OLD_SOURCES;
1732 dtype = MLD2_ALLOW_NEW_SOURCES;
1734 type = MLD2_ALLOW_NEW_SOURCES;
1735 dtype = MLD2_BLOCK_OLD_SOURCES;
1737 skb = add_grec(skb, pmc, type, 0, 0);
1738 skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
1740 /* filter mode changes */
1741 if (pmc->mca_crcount) {
1742 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1743 type = MLD2_CHANGE_TO_EXCLUDE;
1745 type = MLD2_CHANGE_TO_INCLUDE;
1746 skb = add_grec(skb, pmc, type, 0, 0);
1749 spin_unlock_bh(&pmc->mca_lock);
1751 read_unlock_bh(&idev->lock);
1754 (void) mld_sendpack(skb);
1757 static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1759 struct sock *sk = igmp6_socket->sk;
1760 struct inet6_dev *idev;
1761 struct sk_buff *skb;
1762 struct icmp6hdr *hdr;
1763 struct in6_addr *snd_addr;
1764 struct in6_addr *addrp;
1765 struct in6_addr addr_buf;
1766 struct in6_addr all_routers;
1767 int err, len, payload_len, full_len;
1768 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1769 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1773 IP6_INC_STATS(__in6_dev_get(dev),
1774 IPSTATS_MIB_OUTREQUESTS);
1777 if (type == ICMPV6_MGM_REDUCTION) {
1778 snd_addr = &all_routers;
1779 ipv6_addr_all_routers(&all_routers);
1782 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1783 payload_len = len + sizeof(ra);
1784 full_len = sizeof(struct ipv6hdr) + payload_len;
1786 skb = sock_alloc_send_skb(sk, LL_RESERVED_SPACE(dev) + full_len, 1, &err);
1790 IP6_INC_STATS(__in6_dev_get(dev),
1791 IPSTATS_MIB_OUTDISCARDS);
1796 skb_reserve(skb, LL_RESERVED_SPACE(dev));
1798 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1799 /* <draft-ietf-magma-mld-source-05.txt>:
1800 * use unspecified address as the source address
1801 * when a valid link-local address is not available.
1803 memset(&addr_buf, 0, sizeof(addr_buf));
1806 ip6_nd_hdr(sk, skb, dev, &addr_buf, snd_addr, NEXTHDR_HOP, payload_len);
1808 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1810 hdr = (struct icmp6hdr *) skb_put(skb, sizeof(struct icmp6hdr));
1811 memset(hdr, 0, sizeof(struct icmp6hdr));
1812 hdr->icmp6_type = type;
1814 addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr));
1815 ipv6_addr_copy(addrp, addr);
1817 hdr->icmp6_cksum = csum_ipv6_magic(&addr_buf, snd_addr, len,
1819 csum_partial((__u8 *) hdr, len, 0));
1821 idev = in6_dev_get(skb->dev);
1823 err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev,
1824 mld_dev_queue_xmit);
1826 ICMP6MSGOUT_INC_STATS(idev, type);
1827 ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS);
1828 IP6_INC_STATS(idev, IPSTATS_MIB_OUTMCASTPKTS);
1830 IP6_INC_STATS(idev, IPSTATS_MIB_OUTDISCARDS);
1832 if (likely(idev != NULL))
1837 static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
1838 struct in6_addr *psfsrc)
1840 struct ip6_sf_list *psf, *psf_prev;
1844 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1845 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1849 if (!psf || psf->sf_count[sfmode] == 0) {
1850 /* source filter not found, or count wrong => bug */
1853 psf->sf_count[sfmode]--;
1854 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
1855 struct inet6_dev *idev = pmc->idev;
1857 /* no more filters for this source */
1859 psf_prev->sf_next = psf->sf_next;
1861 pmc->mca_sources = psf->sf_next;
1862 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
1863 !MLD_V1_SEEN(idev)) {
1864 psf->sf_crcount = idev->mc_qrv;
1865 psf->sf_next = pmc->mca_tomb;
1866 pmc->mca_tomb = psf;
1874 static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca,
1875 int sfmode, int sfcount, struct in6_addr *psfsrc,
1878 struct ifmcaddr6 *pmc;
1884 read_lock_bh(&idev->lock);
1885 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1886 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
1890 /* MCA not found?? bug */
1891 read_unlock_bh(&idev->lock);
1894 spin_lock_bh(&pmc->mca_lock);
1897 if (!pmc->mca_sfcount[sfmode]) {
1898 spin_unlock_bh(&pmc->mca_lock);
1899 read_unlock_bh(&idev->lock);
1902 pmc->mca_sfcount[sfmode]--;
1905 for (i=0; i<sfcount; i++) {
1906 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
1908 changerec |= rv > 0;
1912 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
1913 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
1914 pmc->mca_sfcount[MCAST_INCLUDE]) {
1915 struct ip6_sf_list *psf;
1917 /* filter mode change */
1918 pmc->mca_sfmode = MCAST_INCLUDE;
1919 pmc->mca_crcount = idev->mc_qrv;
1920 idev->mc_ifc_count = pmc->mca_crcount;
1921 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
1922 psf->sf_crcount = 0;
1923 mld_ifc_event(pmc->idev);
1924 } else if (sf_setstate(pmc) || changerec)
1925 mld_ifc_event(pmc->idev);
1926 spin_unlock_bh(&pmc->mca_lock);
1927 read_unlock_bh(&idev->lock);
1932 * Add multicast single-source filter to the interface list
1934 static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
1935 struct in6_addr *psfsrc, int delta)
1937 struct ip6_sf_list *psf, *psf_prev;
1940 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1941 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1946 psf = kzalloc(sizeof(*psf), GFP_ATOMIC);
1950 psf->sf_addr = *psfsrc;
1952 psf_prev->sf_next = psf;
1954 pmc->mca_sources = psf;
1956 psf->sf_count[sfmode]++;
1960 static void sf_markstate(struct ifmcaddr6 *pmc)
1962 struct ip6_sf_list *psf;
1963 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1965 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
1966 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1967 psf->sf_oldin = mca_xcount ==
1968 psf->sf_count[MCAST_EXCLUDE] &&
1969 !psf->sf_count[MCAST_INCLUDE];
1971 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
1974 static int sf_setstate(struct ifmcaddr6 *pmc)
1976 struct ip6_sf_list *psf, *dpsf;
1977 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1978 int qrv = pmc->idev->mc_qrv;
1982 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1983 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1984 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
1985 !psf->sf_count[MCAST_INCLUDE];
1987 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
1989 if (!psf->sf_oldin) {
1990 struct ip6_sf_list *prev = NULL;
1992 for (dpsf=pmc->mca_tomb; dpsf;
1993 dpsf=dpsf->sf_next) {
1994 if (ipv6_addr_equal(&dpsf->sf_addr,
2001 prev->sf_next = dpsf->sf_next;
2003 pmc->mca_tomb = dpsf->sf_next;
2006 psf->sf_crcount = qrv;
2009 } else if (psf->sf_oldin) {
2010 psf->sf_crcount = 0;
2012 * add or update "delete" records if an active filter
2015 for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next)
2016 if (ipv6_addr_equal(&dpsf->sf_addr,
2020 dpsf = (struct ip6_sf_list *)
2021 kmalloc(sizeof(*dpsf), GFP_ATOMIC);
2025 /* pmc->mca_lock held by callers */
2026 dpsf->sf_next = pmc->mca_tomb;
2027 pmc->mca_tomb = dpsf;
2029 dpsf->sf_crcount = qrv;
2037 * Add multicast source filter list to the interface list
2039 static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca,
2040 int sfmode, int sfcount, struct in6_addr *psfsrc,
2043 struct ifmcaddr6 *pmc;
2049 read_lock_bh(&idev->lock);
2050 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
2051 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2055 /* MCA not found?? bug */
2056 read_unlock_bh(&idev->lock);
2059 spin_lock_bh(&pmc->mca_lock);
2062 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
2064 pmc->mca_sfcount[sfmode]++;
2066 for (i=0; i<sfcount; i++) {
2067 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta);
2075 pmc->mca_sfcount[sfmode]--;
2077 (void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
2078 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
2079 struct inet6_dev *idev = pmc->idev;
2080 struct ip6_sf_list *psf;
2082 /* filter mode change */
2083 if (pmc->mca_sfcount[MCAST_EXCLUDE])
2084 pmc->mca_sfmode = MCAST_EXCLUDE;
2085 else if (pmc->mca_sfcount[MCAST_INCLUDE])
2086 pmc->mca_sfmode = MCAST_INCLUDE;
2087 /* else no filters; keep old mode for reports */
2089 pmc->mca_crcount = idev->mc_qrv;
2090 idev->mc_ifc_count = pmc->mca_crcount;
2091 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
2092 psf->sf_crcount = 0;
2093 mld_ifc_event(idev);
2094 } else if (sf_setstate(pmc))
2095 mld_ifc_event(idev);
2096 spin_unlock_bh(&pmc->mca_lock);
2097 read_unlock_bh(&idev->lock);
2101 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
2103 struct ip6_sf_list *psf, *nextpsf;
2105 for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
2106 nextpsf = psf->sf_next;
2109 pmc->mca_tomb = NULL;
2110 for (psf=pmc->mca_sources; psf; psf=nextpsf) {
2111 nextpsf = psf->sf_next;
2114 pmc->mca_sources = NULL;
2115 pmc->mca_sfmode = MCAST_EXCLUDE;
2116 pmc->mca_sfcount[MCAST_INCLUDE] = 0;
2117 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
2121 static void igmp6_join_group(struct ifmcaddr6 *ma)
2123 unsigned long delay;
2125 if (ma->mca_flags & MAF_NOREPORT)
2128 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2130 delay = net_random() % IGMP6_UNSOLICITED_IVAL;
2132 spin_lock_bh(&ma->mca_lock);
2133 if (del_timer(&ma->mca_timer)) {
2134 atomic_dec(&ma->mca_refcnt);
2135 delay = ma->mca_timer.expires - jiffies;
2138 if (!mod_timer(&ma->mca_timer, jiffies + delay))
2139 atomic_inc(&ma->mca_refcnt);
2140 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
2141 spin_unlock_bh(&ma->mca_lock);
2144 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
2145 struct inet6_dev *idev)
2149 /* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
2150 * so no other readers or writers of iml or its sflist
2152 if (iml->sflist == 0) {
2153 /* any-source empty exclude case */
2154 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
2156 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
2157 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
2158 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
2163 static void igmp6_leave_group(struct ifmcaddr6 *ma)
2165 if (MLD_V1_SEEN(ma->idev)) {
2166 if (ma->mca_flags & MAF_LAST_REPORTER)
2167 igmp6_send(&ma->mca_addr, ma->idev->dev,
2168 ICMPV6_MGM_REDUCTION);
2170 mld_add_delrec(ma->idev, ma);
2171 mld_ifc_event(ma->idev);
2175 static void mld_gq_timer_expire(unsigned long data)
2177 struct inet6_dev *idev = (struct inet6_dev *)data;
2179 idev->mc_gq_running = 0;
2180 mld_send_report(idev, NULL);
2181 __in6_dev_put(idev);
2184 static void mld_ifc_timer_expire(unsigned long data)
2186 struct inet6_dev *idev = (struct inet6_dev *)data;
2189 if (idev->mc_ifc_count) {
2190 idev->mc_ifc_count--;
2191 if (idev->mc_ifc_count)
2192 mld_ifc_start_timer(idev, idev->mc_maxdelay);
2194 __in6_dev_put(idev);
2197 static void mld_ifc_event(struct inet6_dev *idev)
2199 if (MLD_V1_SEEN(idev))
2201 idev->mc_ifc_count = idev->mc_qrv;
2202 mld_ifc_start_timer(idev, 1);
2206 static void igmp6_timer_handler(unsigned long data)
2208 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
2210 if (MLD_V1_SEEN(ma->idev))
2211 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2213 mld_send_report(ma->idev, ma);
2215 spin_lock(&ma->mca_lock);
2216 ma->mca_flags |= MAF_LAST_REPORTER;
2217 ma->mca_flags &= ~MAF_TIMER_RUNNING;
2218 spin_unlock(&ma->mca_lock);
2222 /* Device going down */
2224 void ipv6_mc_down(struct inet6_dev *idev)
2226 struct ifmcaddr6 *i;
2228 /* Withdraw multicast list */
2230 read_lock_bh(&idev->lock);
2231 idev->mc_ifc_count = 0;
2232 if (del_timer(&idev->mc_ifc_timer))
2233 __in6_dev_put(idev);
2234 idev->mc_gq_running = 0;
2235 if (del_timer(&idev->mc_gq_timer))
2236 __in6_dev_put(idev);
2238 for (i = idev->mc_list; i; i=i->next)
2239 igmp6_group_dropped(i);
2240 read_unlock_bh(&idev->lock);
2242 mld_clear_delrec(idev);
2246 /* Device going up */
2248 void ipv6_mc_up(struct inet6_dev *idev)
2250 struct ifmcaddr6 *i;
2252 /* Install multicast list, except for all-nodes (already installed) */
2254 read_lock_bh(&idev->lock);
2255 for (i = idev->mc_list; i; i=i->next)
2256 igmp6_group_added(i);
2257 read_unlock_bh(&idev->lock);
2260 /* IPv6 device initialization. */
2262 void ipv6_mc_init_dev(struct inet6_dev *idev)
2264 write_lock_bh(&idev->lock);
2265 rwlock_init(&idev->mc_lock);
2266 idev->mc_gq_running = 0;
2267 init_timer(&idev->mc_gq_timer);
2268 idev->mc_gq_timer.data = (unsigned long) idev;
2269 idev->mc_gq_timer.function = &mld_gq_timer_expire;
2270 idev->mc_tomb = NULL;
2271 idev->mc_ifc_count = 0;
2272 init_timer(&idev->mc_ifc_timer);
2273 idev->mc_ifc_timer.data = (unsigned long) idev;
2274 idev->mc_ifc_timer.function = &mld_ifc_timer_expire;
2275 idev->mc_qrv = MLD_QRV_DEFAULT;
2276 idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL;
2277 idev->mc_v1_seen = 0;
2278 write_unlock_bh(&idev->lock);
2282 * Device is about to be destroyed: clean up.
2285 void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2287 struct ifmcaddr6 *i;
2288 struct in6_addr maddr;
2290 /* Deactivate timers */
2293 /* Delete all-nodes address. */
2294 ipv6_addr_all_nodes(&maddr);
2296 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2297 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2300 __ipv6_dev_mc_dec(idev, &maddr);
2302 if (idev->cnf.forwarding) {
2303 ipv6_addr_all_routers(&maddr);
2304 __ipv6_dev_mc_dec(idev, &maddr);
2307 write_lock_bh(&idev->lock);
2308 while ((i = idev->mc_list) != NULL) {
2309 idev->mc_list = i->next;
2310 write_unlock_bh(&idev->lock);
2312 igmp6_group_dropped(i);
2315 write_lock_bh(&idev->lock);
2317 write_unlock_bh(&idev->lock);
2320 #ifdef CONFIG_PROC_FS
2321 struct igmp6_mc_iter_state {
2322 struct net_device *dev;
2323 struct inet6_dev *idev;
2326 #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2328 static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
2330 struct ifmcaddr6 *im = NULL;
2331 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2334 for_each_netdev(&init_net, state->dev) {
2335 struct inet6_dev *idev;
2336 idev = in6_dev_get(state->dev);
2339 read_lock_bh(&idev->lock);
2345 read_unlock_bh(&idev->lock);
2351 static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
2353 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2357 if (likely(state->idev != NULL)) {
2358 read_unlock_bh(&state->idev->lock);
2359 in6_dev_put(state->idev);
2361 state->dev = next_net_device(state->dev);
2366 state->idev = in6_dev_get(state->dev);
2369 read_lock_bh(&state->idev->lock);
2370 im = state->idev->mc_list;
2375 static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2377 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2379 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2381 return pos ? NULL : im;
2384 static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
2386 read_lock(&dev_base_lock);
2387 return igmp6_mc_get_idx(seq, *pos);
2390 static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2392 struct ifmcaddr6 *im;
2393 im = igmp6_mc_get_next(seq, v);
2398 static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
2400 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2401 if (likely(state->idev != NULL)) {
2402 read_unlock_bh(&state->idev->lock);
2403 in6_dev_put(state->idev);
2407 read_unlock(&dev_base_lock);
2410 static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
2412 struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
2413 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2416 "%-4d %-15s " NIP6_SEQFMT " %5d %08X %ld\n",
2417 state->dev->ifindex, state->dev->name,
2419 im->mca_users, im->mca_flags,
2420 (im->mca_flags&MAF_TIMER_RUNNING) ?
2421 jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
2425 static const struct seq_operations igmp6_mc_seq_ops = {
2426 .start = igmp6_mc_seq_start,
2427 .next = igmp6_mc_seq_next,
2428 .stop = igmp6_mc_seq_stop,
2429 .show = igmp6_mc_seq_show,
2432 static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
2434 struct seq_file *seq;
2436 struct igmp6_mc_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
2441 rc = seq_open(file, &igmp6_mc_seq_ops);
2445 seq = file->private_data;
2454 static const struct file_operations igmp6_mc_seq_fops = {
2455 .owner = THIS_MODULE,
2456 .open = igmp6_mc_seq_open,
2458 .llseek = seq_lseek,
2459 .release = seq_release_private,
2462 struct igmp6_mcf_iter_state {
2463 struct net_device *dev;
2464 struct inet6_dev *idev;
2465 struct ifmcaddr6 *im;
2468 #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2470 static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
2472 struct ip6_sf_list *psf = NULL;
2473 struct ifmcaddr6 *im = NULL;
2474 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2478 for_each_netdev(&init_net, state->dev) {
2479 struct inet6_dev *idev;
2480 idev = in6_dev_get(state->dev);
2481 if (unlikely(idev == NULL))
2483 read_lock_bh(&idev->lock);
2485 if (likely(im != NULL)) {
2486 spin_lock_bh(&im->mca_lock);
2487 psf = im->mca_sources;
2488 if (likely(psf != NULL)) {
2493 spin_unlock_bh(&im->mca_lock);
2495 read_unlock_bh(&idev->lock);
2501 static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
2503 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2507 spin_unlock_bh(&state->im->mca_lock);
2508 state->im = state->im->next;
2509 while (!state->im) {
2510 if (likely(state->idev != NULL)) {
2511 read_unlock_bh(&state->idev->lock);
2512 in6_dev_put(state->idev);
2514 state->dev = next_net_device(state->dev);
2519 state->idev = in6_dev_get(state->dev);
2522 read_lock_bh(&state->idev->lock);
2523 state->im = state->idev->mc_list;
2527 spin_lock_bh(&state->im->mca_lock);
2528 psf = state->im->mca_sources;
2534 static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2536 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2538 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2540 return pos ? NULL : psf;
2543 static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
2545 read_lock(&dev_base_lock);
2546 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2549 static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2551 struct ip6_sf_list *psf;
2552 if (v == SEQ_START_TOKEN)
2553 psf = igmp6_mcf_get_first(seq);
2555 psf = igmp6_mcf_get_next(seq, v);
2560 static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
2562 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2563 if (likely(state->im != NULL)) {
2564 spin_unlock_bh(&state->im->mca_lock);
2567 if (likely(state->idev != NULL)) {
2568 read_unlock_bh(&state->idev->lock);
2569 in6_dev_put(state->idev);
2573 read_unlock(&dev_base_lock);
2576 static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
2578 struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
2579 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2581 if (v == SEQ_START_TOKEN) {
2584 "%32s %32s %6s %6s\n", "Idx",
2585 "Device", "Multicast Address",
2586 "Source Address", "INC", "EXC");
2589 "%3d %6.6s " NIP6_SEQFMT " " NIP6_SEQFMT " %6lu %6lu\n",
2590 state->dev->ifindex, state->dev->name,
2591 NIP6(state->im->mca_addr),
2593 psf->sf_count[MCAST_INCLUDE],
2594 psf->sf_count[MCAST_EXCLUDE]);
2599 static const struct seq_operations igmp6_mcf_seq_ops = {
2600 .start = igmp6_mcf_seq_start,
2601 .next = igmp6_mcf_seq_next,
2602 .stop = igmp6_mcf_seq_stop,
2603 .show = igmp6_mcf_seq_show,
2606 static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
2608 struct seq_file *seq;
2610 struct igmp6_mcf_iter_state *s = kzalloc(sizeof(*s), GFP_KERNEL);
2615 rc = seq_open(file, &igmp6_mcf_seq_ops);
2619 seq = file->private_data;
2628 static const struct file_operations igmp6_mcf_seq_fops = {
2629 .owner = THIS_MODULE,
2630 .open = igmp6_mcf_seq_open,
2632 .llseek = seq_lseek,
2633 .release = seq_release_private,
2637 int __init igmp6_init(struct net_proto_family *ops)
2639 struct ipv6_pinfo *np;
2643 err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, &igmp6_socket);
2646 "Failed to initialize the IGMP6 control socket (err %d).\n",
2648 igmp6_socket = NULL; /* For safety. */
2652 sk = igmp6_socket->sk;
2653 sk->sk_allocation = GFP_ATOMIC;
2654 sk->sk_prot->unhash(sk);
2659 #ifdef CONFIG_PROC_FS
2660 proc_net_fops_create(&init_net, "igmp6", S_IRUGO, &igmp6_mc_seq_fops);
2661 proc_net_fops_create(&init_net, "mcfilter6", S_IRUGO, &igmp6_mcf_seq_fops);
2667 void igmp6_cleanup(void)
2669 sock_release(igmp6_socket);
2670 igmp6_socket = NULL; /* for safety */
2672 #ifdef CONFIG_PROC_FS
2673 proc_net_remove(&init_net, "mcfilter6");
2674 proc_net_remove(&init_net, "igmp6");