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>
62 #include <net/inet_common.h>
64 #include <net/ip6_checksum.h>
66 /* Set to 3 to get tracing... */
70 #define MDBG(x) printk x
76 * These header formats should be in a separate include file, but icmpv6.h
77 * doesn't have in6_addr defined in all cases, there is no __u128, and no
78 * other files reference these.
83 /* Multicast Listener Discovery version 2 headers */
89 struct in6_addr grec_mca;
90 struct in6_addr grec_src[0];
99 struct mld2_grec grec[0];
109 #if defined(__LITTLE_ENDIAN_BITFIELD)
113 #elif defined(__BIG_ENDIAN_BITFIELD)
118 #error "Please fix <asm/byteorder.h>"
122 struct in6_addr srcs[0];
125 static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
127 /* Big mc list lock for all the sockets */
128 static DEFINE_RWLOCK(ipv6_sk_mc_lock);
130 static void igmp6_join_group(struct ifmcaddr6 *ma);
131 static void igmp6_leave_group(struct ifmcaddr6 *ma);
132 static void igmp6_timer_handler(unsigned long data);
134 static void mld_gq_timer_expire(unsigned long data);
135 static void mld_ifc_timer_expire(unsigned long data);
136 static void mld_ifc_event(struct inet6_dev *idev);
137 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
138 static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *addr);
139 static void mld_clear_delrec(struct inet6_dev *idev);
140 static int sf_setstate(struct ifmcaddr6 *pmc);
141 static void sf_markstate(struct ifmcaddr6 *pmc);
142 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
143 static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca,
144 int sfmode, int sfcount, struct in6_addr *psfsrc,
146 static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca,
147 int sfmode, int sfcount, struct in6_addr *psfsrc,
149 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
150 struct inet6_dev *idev);
153 #define IGMP6_UNSOLICITED_IVAL (10*HZ)
154 #define MLD_QRV_DEFAULT 2
156 #define MLD_V1_SEEN(idev) (ipv6_devconf.force_mld_version == 1 || \
157 (idev)->cnf.force_mld_version == 1 || \
158 ((idev)->mc_v1_seen && \
159 time_before(jiffies, (idev)->mc_v1_seen)))
161 #define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
162 #define MLDV2_EXP(thresh, nbmant, nbexp, value) \
163 ((value) < (thresh) ? (value) : \
164 ((MLDV2_MASK(value, nbmant) | (1<<(nbmant))) << \
165 (MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp))))
167 #define MLDV2_QQIC(value) MLDV2_EXP(0x80, 4, 3, value)
168 #define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value)
170 #define IPV6_MLD_MAX_MSF 64
172 int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF;
175 * socket join on multicast group
178 int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
180 struct net_device *dev = NULL;
181 struct ipv6_mc_socklist *mc_lst;
182 struct ipv6_pinfo *np = inet6_sk(sk);
183 struct net *net = sock_net(sk);
186 if (!ipv6_addr_is_multicast(addr))
189 read_lock_bh(&ipv6_sk_mc_lock);
190 for (mc_lst=np->ipv6_mc_list; mc_lst; mc_lst=mc_lst->next) {
191 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
192 ipv6_addr_equal(&mc_lst->addr, addr)) {
193 read_unlock_bh(&ipv6_sk_mc_lock);
197 read_unlock_bh(&ipv6_sk_mc_lock);
199 mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
205 ipv6_addr_copy(&mc_lst->addr, addr);
209 rt = rt6_lookup(net, addr, NULL, 0, 0);
213 dst_release(&rt->u.dst);
216 dev = dev_get_by_index(net, ifindex);
219 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
223 mc_lst->ifindex = dev->ifindex;
224 mc_lst->sfmode = MCAST_EXCLUDE;
225 rwlock_init(&mc_lst->sflock);
226 mc_lst->sflist = NULL;
229 * now add/increase the group membership on the device
232 err = ipv6_dev_mc_inc(dev, addr);
235 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
240 write_lock_bh(&ipv6_sk_mc_lock);
241 mc_lst->next = np->ipv6_mc_list;
242 np->ipv6_mc_list = mc_lst;
243 write_unlock_bh(&ipv6_sk_mc_lock);
251 * socket leave on multicast group
253 int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
255 struct ipv6_pinfo *np = inet6_sk(sk);
256 struct ipv6_mc_socklist *mc_lst, **lnk;
257 struct net *net = sock_net(sk);
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 dev = dev_get_by_index(net, mc_lst->ifindex);
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 net *net,
290 struct in6_addr *group,
293 struct net_device *dev = NULL;
294 struct inet6_dev *idev = NULL;
299 rt = rt6_lookup(net, group, NULL, 0, 0);
303 dst_release(&rt->u.dst);
306 dev = dev_get_by_index(net, ifindex);
310 idev = in6_dev_get(dev);
315 read_lock_bh(&idev->lock);
317 read_unlock_bh(&idev->lock);
325 void ipv6_sock_mc_close(struct sock *sk)
327 struct ipv6_pinfo *np = inet6_sk(sk);
328 struct ipv6_mc_socklist *mc_lst;
329 struct net *net = sock_net(sk);
331 write_lock_bh(&ipv6_sk_mc_lock);
332 while ((mc_lst = np->ipv6_mc_list) != NULL) {
333 struct net_device *dev;
335 np->ipv6_mc_list = mc_lst->next;
336 write_unlock_bh(&ipv6_sk_mc_lock);
338 dev = dev_get_by_index(net, mc_lst->ifindex);
340 struct inet6_dev *idev = in6_dev_get(dev);
342 (void) ip6_mc_leave_src(sk, mc_lst, idev);
344 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
349 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
351 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
353 write_lock_bh(&ipv6_sk_mc_lock);
355 write_unlock_bh(&ipv6_sk_mc_lock);
358 int ip6_mc_source(int add, int omode, struct sock *sk,
359 struct group_source_req *pgsr)
361 struct in6_addr *source, *group;
362 struct ipv6_mc_socklist *pmc;
363 struct net_device *dev;
364 struct inet6_dev *idev;
365 struct ipv6_pinfo *inet6 = inet6_sk(sk);
366 struct ip6_sf_socklist *psl;
367 struct net *net = sock_net(sk);
373 if (pgsr->gsr_group.ss_family != AF_INET6 ||
374 pgsr->gsr_source.ss_family != AF_INET6)
377 source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
378 group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
380 if (!ipv6_addr_is_multicast(group))
383 idev = ip6_mc_find_dev(net, group, pgsr->gsr_interface);
388 err = -EADDRNOTAVAIL;
390 read_lock_bh(&ipv6_sk_mc_lock);
391 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
392 if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
394 if (ipv6_addr_equal(&pmc->addr, group))
397 if (!pmc) { /* must have a prior join */
401 /* if a source filter was set, must be the same mode as before */
403 if (pmc->sfmode != omode) {
407 } else if (pmc->sfmode != omode) {
408 /* allow mode switches for empty-set filters */
409 ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
410 ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
414 write_lock_bh(&pmc->sflock);
420 goto done; /* err = -EADDRNOTAVAIL */
422 for (i=0; i<psl->sl_count; i++) {
423 rv = memcmp(&psl->sl_addr[i], source,
424 sizeof(struct in6_addr));
428 if (rv) /* source not found */
429 goto done; /* err = -EADDRNOTAVAIL */
431 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
432 if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
437 /* update the interface filter */
438 ip6_mc_del_src(idev, group, omode, 1, source, 1);
440 for (j=i+1; j<psl->sl_count; j++)
441 psl->sl_addr[j-1] = psl->sl_addr[j];
446 /* else, add a new source to the filter */
448 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
452 if (!psl || psl->sl_count == psl->sl_max) {
453 struct ip6_sf_socklist *newpsl;
454 int count = IP6_SFBLOCK;
457 count += psl->sl_max;
458 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
463 newpsl->sl_max = count;
464 newpsl->sl_count = count - IP6_SFBLOCK;
466 for (i=0; i<psl->sl_count; i++)
467 newpsl->sl_addr[i] = psl->sl_addr[i];
468 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
470 pmc->sflist = psl = newpsl;
472 rv = 1; /* > 0 for insert logic below if sl_count is 0 */
473 for (i=0; i<psl->sl_count; i++) {
474 rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr));
478 if (rv == 0) /* address already there is an error */
480 for (j=psl->sl_count-1; j>=i; j--)
481 psl->sl_addr[j+1] = psl->sl_addr[j];
482 psl->sl_addr[i] = *source;
485 /* update the interface list */
486 ip6_mc_add_src(idev, group, omode, 1, source, 1);
489 write_unlock_bh(&pmc->sflock);
490 read_unlock_bh(&ipv6_sk_mc_lock);
491 read_unlock_bh(&idev->lock);
495 return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
499 int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
501 struct in6_addr *group;
502 struct ipv6_mc_socklist *pmc;
503 struct net_device *dev;
504 struct inet6_dev *idev;
505 struct ipv6_pinfo *inet6 = inet6_sk(sk);
506 struct ip6_sf_socklist *newpsl, *psl;
507 struct net *net = sock_net(sk);
511 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
513 if (!ipv6_addr_is_multicast(group))
515 if (gsf->gf_fmode != MCAST_INCLUDE &&
516 gsf->gf_fmode != MCAST_EXCLUDE)
519 idev = ip6_mc_find_dev(net, group, gsf->gf_interface);
526 read_lock_bh(&ipv6_sk_mc_lock);
528 if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
533 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
534 if (pmc->ifindex != gsf->gf_interface)
536 if (ipv6_addr_equal(&pmc->addr, group))
539 if (!pmc) { /* must have a prior join */
543 if (gsf->gf_numsrc) {
544 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
550 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
551 for (i=0; i<newpsl->sl_count; ++i) {
552 struct sockaddr_in6 *psin6;
554 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
555 newpsl->sl_addr[i] = psin6->sin6_addr;
557 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
558 newpsl->sl_count, newpsl->sl_addr, 0);
560 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
565 (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
568 write_lock_bh(&pmc->sflock);
571 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
572 psl->sl_count, psl->sl_addr, 0);
573 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
575 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
576 pmc->sflist = newpsl;
577 pmc->sfmode = gsf->gf_fmode;
578 write_unlock_bh(&pmc->sflock);
581 read_unlock_bh(&ipv6_sk_mc_lock);
582 read_unlock_bh(&idev->lock);
586 err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
590 int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
591 struct group_filter __user *optval, int __user *optlen)
593 int err, i, count, copycount;
594 struct in6_addr *group;
595 struct ipv6_mc_socklist *pmc;
596 struct inet6_dev *idev;
597 struct net_device *dev;
598 struct ipv6_pinfo *inet6 = inet6_sk(sk);
599 struct ip6_sf_socklist *psl;
600 struct net *net = sock_net(sk);
602 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
604 if (!ipv6_addr_is_multicast(group))
607 idev = ip6_mc_find_dev(net, group, gsf->gf_interface);
614 err = -EADDRNOTAVAIL;
616 * changes to the ipv6_mc_list require the socket lock and
617 * a read lock on ip6_sk_mc_lock. We have the socket lock,
618 * so reading the list is safe.
621 for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) {
622 if (pmc->ifindex != gsf->gf_interface)
624 if (ipv6_addr_equal(group, &pmc->addr))
627 if (!pmc) /* must have a prior join */
629 gsf->gf_fmode = pmc->sfmode;
631 count = psl ? psl->sl_count : 0;
632 read_unlock_bh(&idev->lock);
636 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
637 gsf->gf_numsrc = count;
638 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
639 copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
642 /* changes to psl require the socket lock, a read lock on
643 * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We
644 * have the socket lock, so reading here is safe.
646 for (i=0; i<copycount; i++) {
647 struct sockaddr_in6 *psin6;
648 struct sockaddr_storage ss;
650 psin6 = (struct sockaddr_in6 *)&ss;
651 memset(&ss, 0, sizeof(ss));
652 psin6->sin6_family = AF_INET6;
653 psin6->sin6_addr = psl->sl_addr[i];
654 if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
659 read_unlock_bh(&idev->lock);
665 int inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
666 const struct in6_addr *src_addr)
668 struct ipv6_pinfo *np = inet6_sk(sk);
669 struct ipv6_mc_socklist *mc;
670 struct ip6_sf_socklist *psl;
673 read_lock(&ipv6_sk_mc_lock);
674 for (mc = np->ipv6_mc_list; mc; mc = mc->next) {
675 if (ipv6_addr_equal(&mc->addr, mc_addr))
679 read_unlock(&ipv6_sk_mc_lock);
682 read_lock(&mc->sflock);
685 rv = mc->sfmode == MCAST_EXCLUDE;
689 for (i=0; i<psl->sl_count; i++) {
690 if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
693 if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
695 if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
698 read_unlock(&mc->sflock);
699 read_unlock(&ipv6_sk_mc_lock);
704 static void ma_put(struct ifmcaddr6 *mc)
706 if (atomic_dec_and_test(&mc->mca_refcnt)) {
707 in6_dev_put(mc->idev);
712 static void igmp6_group_added(struct ifmcaddr6 *mc)
714 struct net_device *dev = mc->idev->dev;
715 char buf[MAX_ADDR_LEN];
717 spin_lock_bh(&mc->mca_lock);
718 if (!(mc->mca_flags&MAF_LOADED)) {
719 mc->mca_flags |= MAF_LOADED;
720 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
721 dev_mc_add(dev, buf, dev->addr_len, 0);
723 spin_unlock_bh(&mc->mca_lock);
725 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
728 if (MLD_V1_SEEN(mc->idev)) {
729 igmp6_join_group(mc);
734 mc->mca_crcount = mc->idev->mc_qrv;
735 mld_ifc_event(mc->idev);
738 static void igmp6_group_dropped(struct ifmcaddr6 *mc)
740 struct net_device *dev = mc->idev->dev;
741 char buf[MAX_ADDR_LEN];
743 spin_lock_bh(&mc->mca_lock);
744 if (mc->mca_flags&MAF_LOADED) {
745 mc->mca_flags &= ~MAF_LOADED;
746 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
747 dev_mc_delete(dev, buf, dev->addr_len, 0);
750 if (mc->mca_flags & MAF_NOREPORT)
752 spin_unlock_bh(&mc->mca_lock);
755 igmp6_leave_group(mc);
757 spin_lock_bh(&mc->mca_lock);
758 if (del_timer(&mc->mca_timer))
759 atomic_dec(&mc->mca_refcnt);
761 ip6_mc_clear_src(mc);
762 spin_unlock_bh(&mc->mca_lock);
766 * deleted ifmcaddr6 manipulation
768 static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
770 struct ifmcaddr6 *pmc;
772 /* this is an "ifmcaddr6" for convenience; only the fields below
773 * are actually used. In particular, the refcnt and users are not
774 * used for management of the delete list. Using the same structure
775 * for deleted items allows change reports to use common code with
776 * non-deleted or query-response MCA's.
778 pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC);
782 spin_lock_bh(&im->mca_lock);
783 spin_lock_init(&pmc->mca_lock);
784 pmc->idev = im->idev;
786 pmc->mca_addr = im->mca_addr;
787 pmc->mca_crcount = idev->mc_qrv;
788 pmc->mca_sfmode = im->mca_sfmode;
789 if (pmc->mca_sfmode == MCAST_INCLUDE) {
790 struct ip6_sf_list *psf;
792 pmc->mca_tomb = im->mca_tomb;
793 pmc->mca_sources = im->mca_sources;
794 im->mca_tomb = im->mca_sources = NULL;
795 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
796 psf->sf_crcount = pmc->mca_crcount;
798 spin_unlock_bh(&im->mca_lock);
800 write_lock_bh(&idev->mc_lock);
801 pmc->next = idev->mc_tomb;
803 write_unlock_bh(&idev->mc_lock);
806 static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca)
808 struct ifmcaddr6 *pmc, *pmc_prev;
809 struct ip6_sf_list *psf, *psf_next;
811 write_lock_bh(&idev->mc_lock);
813 for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
814 if (ipv6_addr_equal(&pmc->mca_addr, pmca))
820 pmc_prev->next = pmc->next;
822 idev->mc_tomb = pmc->next;
824 write_unlock_bh(&idev->mc_lock);
826 for (psf=pmc->mca_tomb; psf; psf=psf_next) {
827 psf_next = psf->sf_next;
830 in6_dev_put(pmc->idev);
835 static void mld_clear_delrec(struct inet6_dev *idev)
837 struct ifmcaddr6 *pmc, *nextpmc;
839 write_lock_bh(&idev->mc_lock);
841 idev->mc_tomb = NULL;
842 write_unlock_bh(&idev->mc_lock);
844 for (; pmc; pmc = nextpmc) {
846 ip6_mc_clear_src(pmc);
847 in6_dev_put(pmc->idev);
851 /* clear dead sources, too */
852 read_lock_bh(&idev->lock);
853 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
854 struct ip6_sf_list *psf, *psf_next;
856 spin_lock_bh(&pmc->mca_lock);
858 pmc->mca_tomb = NULL;
859 spin_unlock_bh(&pmc->mca_lock);
860 for (; psf; psf=psf_next) {
861 psf_next = psf->sf_next;
865 read_unlock_bh(&idev->lock);
870 * device multicast group inc (add if not found)
872 int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr)
874 struct ifmcaddr6 *mc;
875 struct inet6_dev *idev;
877 idev = in6_dev_get(dev);
882 write_lock_bh(&idev->lock);
884 write_unlock_bh(&idev->lock);
889 for (mc = idev->mc_list; mc; mc = mc->next) {
890 if (ipv6_addr_equal(&mc->mca_addr, addr)) {
892 write_unlock_bh(&idev->lock);
893 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
901 * not found: create a new one.
904 mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
907 write_unlock_bh(&idev->lock);
912 setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc);
914 ipv6_addr_copy(&mc->mca_addr, addr);
917 /* mca_stamp should be updated upon changes */
918 mc->mca_cstamp = mc->mca_tstamp = jiffies;
919 atomic_set(&mc->mca_refcnt, 2);
920 spin_lock_init(&mc->mca_lock);
922 /* initial mode is (EX, empty) */
923 mc->mca_sfmode = MCAST_EXCLUDE;
924 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
926 if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
927 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
928 mc->mca_flags |= MAF_NOREPORT;
930 mc->next = idev->mc_list;
932 write_unlock_bh(&idev->lock);
934 mld_del_delrec(idev, &mc->mca_addr);
935 igmp6_group_added(mc);
941 * device multicast group del
943 int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr)
945 struct ifmcaddr6 *ma, **map;
947 write_lock_bh(&idev->lock);
948 for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
949 if (ipv6_addr_equal(&ma->mca_addr, addr)) {
950 if (--ma->mca_users == 0) {
952 write_unlock_bh(&idev->lock);
954 igmp6_group_dropped(ma);
959 write_unlock_bh(&idev->lock);
963 write_unlock_bh(&idev->lock);
968 int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
970 struct inet6_dev *idev = in6_dev_get(dev);
976 err = __ipv6_dev_mc_dec(idev, addr);
984 * identify MLD packets for MLD filter exceptions
986 int ipv6_is_mld(struct sk_buff *skb, int nexthdr)
988 struct icmp6hdr *pic;
990 if (nexthdr != IPPROTO_ICMPV6)
993 if (!pskb_may_pull(skb, sizeof(struct icmp6hdr)))
996 pic = icmp6_hdr(skb);
998 switch (pic->icmp6_type) {
999 case ICMPV6_MGM_QUERY:
1000 case ICMPV6_MGM_REPORT:
1001 case ICMPV6_MGM_REDUCTION:
1002 case ICMPV6_MLD2_REPORT:
1011 * check if the interface/address pair is valid
1013 int ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
1014 const struct in6_addr *src_addr)
1016 struct inet6_dev *idev;
1017 struct ifmcaddr6 *mc;
1020 idev = in6_dev_get(dev);
1022 read_lock_bh(&idev->lock);
1023 for (mc = idev->mc_list; mc; mc=mc->next) {
1024 if (ipv6_addr_equal(&mc->mca_addr, group))
1028 if (src_addr && !ipv6_addr_any(src_addr)) {
1029 struct ip6_sf_list *psf;
1031 spin_lock_bh(&mc->mca_lock);
1032 for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
1033 if (ipv6_addr_equal(&psf->sf_addr, src_addr))
1037 rv = psf->sf_count[MCAST_INCLUDE] ||
1038 psf->sf_count[MCAST_EXCLUDE] !=
1039 mc->mca_sfcount[MCAST_EXCLUDE];
1041 rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0;
1042 spin_unlock_bh(&mc->mca_lock);
1044 rv = 1; /* don't filter unspecified source */
1046 read_unlock_bh(&idev->lock);
1052 static void mld_gq_start_timer(struct inet6_dev *idev)
1054 int tv = net_random() % idev->mc_maxdelay;
1056 idev->mc_gq_running = 1;
1057 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
1061 static void mld_ifc_start_timer(struct inet6_dev *idev, int delay)
1063 int tv = net_random() % delay;
1065 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
1070 * IGMP handling (alias multicast ICMPv6 messages)
1073 static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
1075 unsigned long delay = resptime;
1077 /* Do not start timer for these addresses */
1078 if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
1079 IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
1082 if (del_timer(&ma->mca_timer)) {
1083 atomic_dec(&ma->mca_refcnt);
1084 delay = ma->mca_timer.expires - jiffies;
1087 if (delay >= resptime) {
1089 delay = net_random() % resptime;
1093 ma->mca_timer.expires = jiffies + delay;
1094 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1095 atomic_inc(&ma->mca_refcnt);
1096 ma->mca_flags |= MAF_TIMER_RUNNING;
1099 /* mark EXCLUDE-mode sources */
1100 static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
1101 struct in6_addr *srcs)
1103 struct ip6_sf_list *psf;
1107 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1108 if (scount == nsrcs)
1110 for (i=0; i<nsrcs; i++) {
1111 /* skip inactive filters */
1112 if (pmc->mca_sfcount[MCAST_INCLUDE] ||
1113 pmc->mca_sfcount[MCAST_EXCLUDE] !=
1114 psf->sf_count[MCAST_EXCLUDE])
1116 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1122 pmc->mca_flags &= ~MAF_GSQUERY;
1123 if (scount == nsrcs) /* all sources excluded */
1128 static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
1129 struct in6_addr *srcs)
1131 struct ip6_sf_list *psf;
1134 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1135 return mld_xmarksources(pmc, nsrcs, srcs);
1137 /* mark INCLUDE-mode sources */
1140 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1141 if (scount == nsrcs)
1143 for (i=0; i<nsrcs; i++) {
1144 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1152 pmc->mca_flags &= ~MAF_GSQUERY;
1155 pmc->mca_flags |= MAF_GSQUERY;
1159 int igmp6_event_query(struct sk_buff *skb)
1161 struct mld2_query *mlh2 = NULL;
1162 struct ifmcaddr6 *ma;
1163 struct in6_addr *group;
1164 unsigned long max_delay;
1165 struct inet6_dev *idev;
1166 struct icmp6hdr *hdr;
1171 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1174 /* compute payload length excluding extension headers */
1175 len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr);
1176 len -= skb_network_header_len(skb);
1178 /* Drop queries with not link local source */
1179 if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL))
1182 idev = in6_dev_get(skb->dev);
1187 hdr = icmp6_hdr(skb);
1188 group = (struct in6_addr *) (hdr + 1);
1189 group_type = ipv6_addr_type(group);
1191 if (group_type != IPV6_ADDR_ANY &&
1192 !(group_type&IPV6_ADDR_MULTICAST)) {
1199 /* MLDv1 router present */
1201 /* Translate milliseconds to jiffies */
1202 max_delay = (ntohs(hdr->icmp6_maxdelay)*HZ)/1000;
1204 switchback = (idev->mc_qrv + 1) * max_delay;
1205 idev->mc_v1_seen = jiffies + switchback;
1207 /* cancel the interface change timer */
1208 idev->mc_ifc_count = 0;
1209 if (del_timer(&idev->mc_ifc_timer))
1210 __in6_dev_put(idev);
1211 /* clear deleted report items */
1212 mld_clear_delrec(idev);
1213 } else if (len >= 28) {
1214 int srcs_offset = sizeof(struct mld2_query) -
1215 sizeof(struct icmp6hdr);
1216 if (!pskb_may_pull(skb, srcs_offset)) {
1220 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1221 max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000;
1224 idev->mc_maxdelay = max_delay;
1226 idev->mc_qrv = mlh2->qrv;
1227 if (group_type == IPV6_ADDR_ANY) { /* general query */
1230 return -EINVAL; /* no sources allowed */
1232 mld_gq_start_timer(idev);
1236 /* mark sources to include, if group & source-specific */
1237 if (mlh2->nsrcs != 0) {
1238 if (!pskb_may_pull(skb, srcs_offset +
1239 ntohs(mlh2->nsrcs) * sizeof(struct in6_addr))) {
1243 mlh2 = (struct mld2_query *)skb_transport_header(skb);
1251 read_lock_bh(&idev->lock);
1252 if (group_type == IPV6_ADDR_ANY) {
1253 for (ma = idev->mc_list; ma; ma=ma->next) {
1254 spin_lock_bh(&ma->mca_lock);
1255 igmp6_group_queried(ma, max_delay);
1256 spin_unlock_bh(&ma->mca_lock);
1259 for (ma = idev->mc_list; ma; ma=ma->next) {
1260 if (!ipv6_addr_equal(group, &ma->mca_addr))
1262 spin_lock_bh(&ma->mca_lock);
1263 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1264 /* gsquery <- gsquery && mark */
1266 ma->mca_flags &= ~MAF_GSQUERY;
1268 /* gsquery <- mark */
1270 ma->mca_flags |= MAF_GSQUERY;
1272 ma->mca_flags &= ~MAF_GSQUERY;
1274 if (!(ma->mca_flags & MAF_GSQUERY) ||
1275 mld_marksources(ma, ntohs(mlh2->nsrcs), mlh2->srcs))
1276 igmp6_group_queried(ma, max_delay);
1277 spin_unlock_bh(&ma->mca_lock);
1281 read_unlock_bh(&idev->lock);
1288 int igmp6_event_report(struct sk_buff *skb)
1290 struct ifmcaddr6 *ma;
1291 struct in6_addr *addrp;
1292 struct inet6_dev *idev;
1293 struct icmp6hdr *hdr;
1296 /* Our own report looped back. Ignore it. */
1297 if (skb->pkt_type == PACKET_LOOPBACK)
1300 /* send our report if the MC router may not have heard this report */
1301 if (skb->pkt_type != PACKET_MULTICAST &&
1302 skb->pkt_type != PACKET_BROADCAST)
1305 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1308 hdr = icmp6_hdr(skb);
1310 /* Drop reports with not link local source */
1311 addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr);
1312 if (addr_type != IPV6_ADDR_ANY &&
1313 !(addr_type&IPV6_ADDR_LINKLOCAL))
1316 addrp = (struct in6_addr *) (hdr + 1);
1318 idev = in6_dev_get(skb->dev);
1323 * Cancel the timer for this group
1326 read_lock_bh(&idev->lock);
1327 for (ma = idev->mc_list; ma; ma=ma->next) {
1328 if (ipv6_addr_equal(&ma->mca_addr, addrp)) {
1329 spin_lock(&ma->mca_lock);
1330 if (del_timer(&ma->mca_timer))
1331 atomic_dec(&ma->mca_refcnt);
1332 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1333 spin_unlock(&ma->mca_lock);
1337 read_unlock_bh(&idev->lock);
1342 static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1343 int gdeleted, int sdeleted)
1346 case MLD2_MODE_IS_INCLUDE:
1347 case MLD2_MODE_IS_EXCLUDE:
1348 if (gdeleted || sdeleted)
1350 if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
1351 if (pmc->mca_sfmode == MCAST_INCLUDE)
1353 /* don't include if this source is excluded
1356 if (psf->sf_count[MCAST_INCLUDE])
1357 return type == MLD2_MODE_IS_INCLUDE;
1358 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1359 psf->sf_count[MCAST_EXCLUDE];
1362 case MLD2_CHANGE_TO_INCLUDE:
1363 if (gdeleted || sdeleted)
1365 return psf->sf_count[MCAST_INCLUDE] != 0;
1366 case MLD2_CHANGE_TO_EXCLUDE:
1367 if (gdeleted || sdeleted)
1369 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1370 psf->sf_count[MCAST_INCLUDE])
1372 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1373 psf->sf_count[MCAST_EXCLUDE];
1374 case MLD2_ALLOW_NEW_SOURCES:
1375 if (gdeleted || !psf->sf_crcount)
1377 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1378 case MLD2_BLOCK_OLD_SOURCES:
1379 if (pmc->mca_sfmode == MCAST_INCLUDE)
1380 return gdeleted || (psf->sf_crcount && sdeleted);
1381 return psf->sf_crcount && !gdeleted && !sdeleted;
1387 mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1389 struct ip6_sf_list *psf;
1392 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1393 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1400 static struct sk_buff *mld_newpack(struct net_device *dev, int size)
1402 struct net *net = dev_net(dev);
1403 struct sock *sk = net->ipv6.igmp_sk;
1404 struct sk_buff *skb;
1405 struct mld2_report *pmr;
1406 struct in6_addr addr_buf;
1408 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1409 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1412 /* we assume size > sizeof(ra) here */
1413 skb = sock_alloc_send_skb(sk, size + LL_RESERVED_SPACE(dev), 1, &err);
1418 skb_reserve(skb, LL_RESERVED_SPACE(dev));
1420 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1421 /* <draft-ietf-magma-mld-source-05.txt>:
1422 * use unspecified address as the source address
1423 * when a valid link-local address is not available.
1425 memset(&addr_buf, 0, sizeof(addr_buf));
1428 ip6_nd_hdr(sk, skb, dev, &addr_buf, &mld2_all_mcr, NEXTHDR_HOP, 0);
1430 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1432 skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data);
1433 skb_put(skb, sizeof(*pmr));
1434 pmr = (struct mld2_report *)skb_transport_header(skb);
1435 pmr->type = ICMPV6_MLD2_REPORT;
1443 static void mld_sendpack(struct sk_buff *skb)
1445 struct ipv6hdr *pip6 = ipv6_hdr(skb);
1446 struct mld2_report *pmr =
1447 (struct mld2_report *)skb_transport_header(skb);
1448 int payload_len, mldlen;
1449 struct inet6_dev *idev = in6_dev_get(skb->dev);
1450 struct net *net = dev_net(skb->dev);
1454 IP6_INC_STATS(idev, IPSTATS_MIB_OUTREQUESTS);
1455 payload_len = (skb->tail - skb->network_header) - sizeof(*pip6);
1456 mldlen = skb->tail - skb->transport_header;
1457 pip6->payload_len = htons(payload_len);
1459 pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
1460 IPPROTO_ICMPV6, csum_partial(skb_transport_header(skb),
1463 skb->dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
1470 icmpv6_flow_init(net->ipv6.igmp_sk, &fl, ICMPV6_MLD2_REPORT,
1471 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1474 err = xfrm_lookup(&skb->dst, &fl, NULL, 0);
1478 err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
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))
1497 static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
1499 return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel);
1502 static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1503 int type, struct mld2_grec **ppgr)
1505 struct net_device *dev = pmc->idev->dev;
1506 struct mld2_report *pmr;
1507 struct mld2_grec *pgr;
1510 skb = mld_newpack(dev, dev->mtu);
1513 pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
1514 pgr->grec_type = type;
1515 pgr->grec_auxwords = 0;
1516 pgr->grec_nsrcs = 0;
1517 pgr->grec_mca = pmc->mca_addr; /* structure copy */
1518 pmr = (struct mld2_report *)skb_transport_header(skb);
1519 pmr->ngrec = htons(ntohs(pmr->ngrec)+1);
1524 #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
1525 skb_tailroom(skb)) : 0)
1527 static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1528 int type, int gdeleted, int sdeleted)
1530 struct net_device *dev = pmc->idev->dev;
1531 struct mld2_report *pmr;
1532 struct mld2_grec *pgr = NULL;
1533 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
1534 int scount, stotal, first, isquery, truncate;
1536 if (pmc->mca_flags & MAF_NOREPORT)
1539 isquery = type == MLD2_MODE_IS_INCLUDE ||
1540 type == MLD2_MODE_IS_EXCLUDE;
1541 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1542 type == MLD2_CHANGE_TO_EXCLUDE;
1544 stotal = scount = 0;
1546 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1551 pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL;
1553 /* EX and TO_EX get a fresh packet, if needed */
1555 if (pmr && pmr->ngrec &&
1556 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1559 skb = mld_newpack(dev, dev->mtu);
1564 for (psf=*psf_list; psf; psf=psf_next) {
1565 struct in6_addr *psrc;
1567 psf_next = psf->sf_next;
1569 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1574 /* clear marks on query responses */
1578 if (AVAILABLE(skb) < sizeof(*psrc) +
1579 first*sizeof(struct mld2_grec)) {
1580 if (truncate && !first)
1581 break; /* truncate these */
1583 pgr->grec_nsrcs = htons(scount);
1586 skb = mld_newpack(dev, dev->mtu);
1591 skb = add_grhead(skb, pmc, type, &pgr);
1596 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1597 *psrc = psf->sf_addr;
1599 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1600 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1602 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1604 psf_prev->sf_next = psf->sf_next;
1606 *psf_list = psf->sf_next;
1616 if (type == MLD2_ALLOW_NEW_SOURCES ||
1617 type == MLD2_BLOCK_OLD_SOURCES)
1619 if (pmc->mca_crcount || isquery) {
1620 /* make sure we have room for group header */
1621 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
1623 skb = NULL; /* add_grhead will get a new one */
1625 skb = add_grhead(skb, pmc, type, &pgr);
1629 pgr->grec_nsrcs = htons(scount);
1632 pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
1636 static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1638 struct sk_buff *skb = NULL;
1642 read_lock_bh(&idev->lock);
1643 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1644 if (pmc->mca_flags & MAF_NOREPORT)
1646 spin_lock_bh(&pmc->mca_lock);
1647 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1648 type = MLD2_MODE_IS_EXCLUDE;
1650 type = MLD2_MODE_IS_INCLUDE;
1651 skb = add_grec(skb, pmc, type, 0, 0);
1652 spin_unlock_bh(&pmc->mca_lock);
1654 read_unlock_bh(&idev->lock);
1656 spin_lock_bh(&pmc->mca_lock);
1657 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1658 type = MLD2_MODE_IS_EXCLUDE;
1660 type = MLD2_MODE_IS_INCLUDE;
1661 skb = add_grec(skb, pmc, type, 0, 0);
1662 spin_unlock_bh(&pmc->mca_lock);
1669 * remove zero-count source records from a source filter list
1671 static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1673 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1676 for (psf=*ppsf; psf; psf = psf_next) {
1677 psf_next = psf->sf_next;
1678 if (psf->sf_crcount == 0) {
1680 psf_prev->sf_next = psf->sf_next;
1682 *ppsf = psf->sf_next;
1689 static void mld_send_cr(struct inet6_dev *idev)
1691 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1692 struct sk_buff *skb = NULL;
1695 read_lock_bh(&idev->lock);
1696 write_lock_bh(&idev->mc_lock);
1700 for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
1701 pmc_next = pmc->next;
1702 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1703 type = MLD2_BLOCK_OLD_SOURCES;
1704 dtype = MLD2_BLOCK_OLD_SOURCES;
1705 skb = add_grec(skb, pmc, type, 1, 0);
1706 skb = add_grec(skb, pmc, dtype, 1, 1);
1708 if (pmc->mca_crcount) {
1709 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1710 type = MLD2_CHANGE_TO_INCLUDE;
1711 skb = add_grec(skb, pmc, type, 1, 0);
1714 if (pmc->mca_crcount == 0) {
1715 mld_clear_zeros(&pmc->mca_tomb);
1716 mld_clear_zeros(&pmc->mca_sources);
1719 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1720 !pmc->mca_sources) {
1722 pmc_prev->next = pmc_next;
1724 idev->mc_tomb = pmc_next;
1725 in6_dev_put(pmc->idev);
1730 write_unlock_bh(&idev->mc_lock);
1733 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1734 spin_lock_bh(&pmc->mca_lock);
1735 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1736 type = MLD2_BLOCK_OLD_SOURCES;
1737 dtype = MLD2_ALLOW_NEW_SOURCES;
1739 type = MLD2_ALLOW_NEW_SOURCES;
1740 dtype = MLD2_BLOCK_OLD_SOURCES;
1742 skb = add_grec(skb, pmc, type, 0, 0);
1743 skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
1745 /* filter mode changes */
1746 if (pmc->mca_crcount) {
1747 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1748 type = MLD2_CHANGE_TO_EXCLUDE;
1750 type = MLD2_CHANGE_TO_INCLUDE;
1751 skb = add_grec(skb, pmc, type, 0, 0);
1754 spin_unlock_bh(&pmc->mca_lock);
1756 read_unlock_bh(&idev->lock);
1759 (void) mld_sendpack(skb);
1762 static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1764 struct net *net = dev_net(dev);
1765 struct sock *sk = net->ipv6.igmp_sk;
1766 struct inet6_dev *idev;
1767 struct sk_buff *skb;
1768 struct icmp6hdr *hdr;
1769 struct in6_addr *snd_addr;
1770 struct in6_addr *addrp;
1771 struct in6_addr addr_buf;
1772 struct in6_addr all_routers;
1773 int err, len, payload_len, full_len;
1774 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1775 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1780 IP6_INC_STATS(__in6_dev_get(dev),
1781 IPSTATS_MIB_OUTREQUESTS);
1784 if (type == ICMPV6_MGM_REDUCTION) {
1785 snd_addr = &all_routers;
1786 ipv6_addr_all_routers(&all_routers);
1789 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1790 payload_len = len + sizeof(ra);
1791 full_len = sizeof(struct ipv6hdr) + payload_len;
1793 skb = sock_alloc_send_skb(sk, LL_RESERVED_SPACE(dev) + full_len, 1, &err);
1797 IP6_INC_STATS(__in6_dev_get(dev),
1798 IPSTATS_MIB_OUTDISCARDS);
1803 skb_reserve(skb, LL_RESERVED_SPACE(dev));
1805 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
1806 /* <draft-ietf-magma-mld-source-05.txt>:
1807 * use unspecified address as the source address
1808 * when a valid link-local address is not available.
1810 memset(&addr_buf, 0, sizeof(addr_buf));
1813 ip6_nd_hdr(sk, skb, dev, &addr_buf, snd_addr, NEXTHDR_HOP, payload_len);
1815 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1817 hdr = (struct icmp6hdr *) skb_put(skb, sizeof(struct icmp6hdr));
1818 memset(hdr, 0, sizeof(struct icmp6hdr));
1819 hdr->icmp6_type = type;
1821 addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr));
1822 ipv6_addr_copy(addrp, addr);
1824 hdr->icmp6_cksum = csum_ipv6_magic(&addr_buf, snd_addr, len,
1826 csum_partial((__u8 *) hdr, len, 0));
1828 idev = in6_dev_get(skb->dev);
1830 skb->dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
1836 icmpv6_flow_init(sk, &fl, type,
1837 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1840 err = xfrm_lookup(&skb->dst, &fl, NULL, 0);
1844 err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
1848 ICMP6MSGOUT_INC_STATS(idev, type);
1849 ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS);
1850 IP6_INC_STATS(idev, IPSTATS_MIB_OUTMCASTPKTS);
1852 IP6_INC_STATS(idev, IPSTATS_MIB_OUTDISCARDS);
1854 if (likely(idev != NULL))
1863 static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
1864 struct in6_addr *psfsrc)
1866 struct ip6_sf_list *psf, *psf_prev;
1870 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1871 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1875 if (!psf || psf->sf_count[sfmode] == 0) {
1876 /* source filter not found, or count wrong => bug */
1879 psf->sf_count[sfmode]--;
1880 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
1881 struct inet6_dev *idev = pmc->idev;
1883 /* no more filters for this source */
1885 psf_prev->sf_next = psf->sf_next;
1887 pmc->mca_sources = psf->sf_next;
1888 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
1889 !MLD_V1_SEEN(idev)) {
1890 psf->sf_crcount = idev->mc_qrv;
1891 psf->sf_next = pmc->mca_tomb;
1892 pmc->mca_tomb = psf;
1900 static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca,
1901 int sfmode, int sfcount, struct in6_addr *psfsrc,
1904 struct ifmcaddr6 *pmc;
1910 read_lock_bh(&idev->lock);
1911 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1912 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
1916 /* MCA not found?? bug */
1917 read_unlock_bh(&idev->lock);
1920 spin_lock_bh(&pmc->mca_lock);
1923 if (!pmc->mca_sfcount[sfmode]) {
1924 spin_unlock_bh(&pmc->mca_lock);
1925 read_unlock_bh(&idev->lock);
1928 pmc->mca_sfcount[sfmode]--;
1931 for (i=0; i<sfcount; i++) {
1932 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
1934 changerec |= rv > 0;
1938 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
1939 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
1940 pmc->mca_sfcount[MCAST_INCLUDE]) {
1941 struct ip6_sf_list *psf;
1943 /* filter mode change */
1944 pmc->mca_sfmode = MCAST_INCLUDE;
1945 pmc->mca_crcount = idev->mc_qrv;
1946 idev->mc_ifc_count = pmc->mca_crcount;
1947 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
1948 psf->sf_crcount = 0;
1949 mld_ifc_event(pmc->idev);
1950 } else if (sf_setstate(pmc) || changerec)
1951 mld_ifc_event(pmc->idev);
1952 spin_unlock_bh(&pmc->mca_lock);
1953 read_unlock_bh(&idev->lock);
1958 * Add multicast single-source filter to the interface list
1960 static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
1961 struct in6_addr *psfsrc, int delta)
1963 struct ip6_sf_list *psf, *psf_prev;
1966 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1967 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1972 psf = kzalloc(sizeof(*psf), GFP_ATOMIC);
1976 psf->sf_addr = *psfsrc;
1978 psf_prev->sf_next = psf;
1980 pmc->mca_sources = psf;
1982 psf->sf_count[sfmode]++;
1986 static void sf_markstate(struct ifmcaddr6 *pmc)
1988 struct ip6_sf_list *psf;
1989 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1991 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
1992 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1993 psf->sf_oldin = mca_xcount ==
1994 psf->sf_count[MCAST_EXCLUDE] &&
1995 !psf->sf_count[MCAST_INCLUDE];
1997 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
2000 static int sf_setstate(struct ifmcaddr6 *pmc)
2002 struct ip6_sf_list *psf, *dpsf;
2003 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
2004 int qrv = pmc->idev->mc_qrv;
2008 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
2009 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
2010 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
2011 !psf->sf_count[MCAST_INCLUDE];
2013 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
2015 if (!psf->sf_oldin) {
2016 struct ip6_sf_list *prev = NULL;
2018 for (dpsf=pmc->mca_tomb; dpsf;
2019 dpsf=dpsf->sf_next) {
2020 if (ipv6_addr_equal(&dpsf->sf_addr,
2027 prev->sf_next = dpsf->sf_next;
2029 pmc->mca_tomb = dpsf->sf_next;
2032 psf->sf_crcount = qrv;
2035 } else if (psf->sf_oldin) {
2036 psf->sf_crcount = 0;
2038 * add or update "delete" records if an active filter
2041 for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next)
2042 if (ipv6_addr_equal(&dpsf->sf_addr,
2046 dpsf = (struct ip6_sf_list *)
2047 kmalloc(sizeof(*dpsf), GFP_ATOMIC);
2051 /* pmc->mca_lock held by callers */
2052 dpsf->sf_next = pmc->mca_tomb;
2053 pmc->mca_tomb = dpsf;
2055 dpsf->sf_crcount = qrv;
2063 * Add multicast source filter list to the interface list
2065 static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca,
2066 int sfmode, int sfcount, struct in6_addr *psfsrc,
2069 struct ifmcaddr6 *pmc;
2075 read_lock_bh(&idev->lock);
2076 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
2077 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2081 /* MCA not found?? bug */
2082 read_unlock_bh(&idev->lock);
2085 spin_lock_bh(&pmc->mca_lock);
2088 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
2090 pmc->mca_sfcount[sfmode]++;
2092 for (i=0; i<sfcount; i++) {
2093 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta);
2101 pmc->mca_sfcount[sfmode]--;
2103 (void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
2104 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
2105 struct inet6_dev *idev = pmc->idev;
2106 struct ip6_sf_list *psf;
2108 /* filter mode change */
2109 if (pmc->mca_sfcount[MCAST_EXCLUDE])
2110 pmc->mca_sfmode = MCAST_EXCLUDE;
2111 else if (pmc->mca_sfcount[MCAST_INCLUDE])
2112 pmc->mca_sfmode = MCAST_INCLUDE;
2113 /* else no filters; keep old mode for reports */
2115 pmc->mca_crcount = idev->mc_qrv;
2116 idev->mc_ifc_count = pmc->mca_crcount;
2117 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
2118 psf->sf_crcount = 0;
2119 mld_ifc_event(idev);
2120 } else if (sf_setstate(pmc))
2121 mld_ifc_event(idev);
2122 spin_unlock_bh(&pmc->mca_lock);
2123 read_unlock_bh(&idev->lock);
2127 static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
2129 struct ip6_sf_list *psf, *nextpsf;
2131 for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
2132 nextpsf = psf->sf_next;
2135 pmc->mca_tomb = NULL;
2136 for (psf=pmc->mca_sources; psf; psf=nextpsf) {
2137 nextpsf = psf->sf_next;
2140 pmc->mca_sources = NULL;
2141 pmc->mca_sfmode = MCAST_EXCLUDE;
2142 pmc->mca_sfcount[MCAST_INCLUDE] = 0;
2143 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
2147 static void igmp6_join_group(struct ifmcaddr6 *ma)
2149 unsigned long delay;
2151 if (ma->mca_flags & MAF_NOREPORT)
2154 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2156 delay = net_random() % IGMP6_UNSOLICITED_IVAL;
2158 spin_lock_bh(&ma->mca_lock);
2159 if (del_timer(&ma->mca_timer)) {
2160 atomic_dec(&ma->mca_refcnt);
2161 delay = ma->mca_timer.expires - jiffies;
2164 if (!mod_timer(&ma->mca_timer, jiffies + delay))
2165 atomic_inc(&ma->mca_refcnt);
2166 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
2167 spin_unlock_bh(&ma->mca_lock);
2170 static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
2171 struct inet6_dev *idev)
2175 /* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
2176 * so no other readers or writers of iml or its sflist
2179 /* any-source empty exclude case */
2180 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
2182 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
2183 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
2184 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
2189 static void igmp6_leave_group(struct ifmcaddr6 *ma)
2191 if (MLD_V1_SEEN(ma->idev)) {
2192 if (ma->mca_flags & MAF_LAST_REPORTER)
2193 igmp6_send(&ma->mca_addr, ma->idev->dev,
2194 ICMPV6_MGM_REDUCTION);
2196 mld_add_delrec(ma->idev, ma);
2197 mld_ifc_event(ma->idev);
2201 static void mld_gq_timer_expire(unsigned long data)
2203 struct inet6_dev *idev = (struct inet6_dev *)data;
2205 idev->mc_gq_running = 0;
2206 mld_send_report(idev, NULL);
2207 __in6_dev_put(idev);
2210 static void mld_ifc_timer_expire(unsigned long data)
2212 struct inet6_dev *idev = (struct inet6_dev *)data;
2215 if (idev->mc_ifc_count) {
2216 idev->mc_ifc_count--;
2217 if (idev->mc_ifc_count)
2218 mld_ifc_start_timer(idev, idev->mc_maxdelay);
2220 __in6_dev_put(idev);
2223 static void mld_ifc_event(struct inet6_dev *idev)
2225 if (MLD_V1_SEEN(idev))
2227 idev->mc_ifc_count = idev->mc_qrv;
2228 mld_ifc_start_timer(idev, 1);
2232 static void igmp6_timer_handler(unsigned long data)
2234 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
2236 if (MLD_V1_SEEN(ma->idev))
2237 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2239 mld_send_report(ma->idev, ma);
2241 spin_lock(&ma->mca_lock);
2242 ma->mca_flags |= MAF_LAST_REPORTER;
2243 ma->mca_flags &= ~MAF_TIMER_RUNNING;
2244 spin_unlock(&ma->mca_lock);
2248 /* Device going down */
2250 void ipv6_mc_down(struct inet6_dev *idev)
2252 struct ifmcaddr6 *i;
2254 /* Withdraw multicast list */
2256 read_lock_bh(&idev->lock);
2257 idev->mc_ifc_count = 0;
2258 if (del_timer(&idev->mc_ifc_timer))
2259 __in6_dev_put(idev);
2260 idev->mc_gq_running = 0;
2261 if (del_timer(&idev->mc_gq_timer))
2262 __in6_dev_put(idev);
2264 for (i = idev->mc_list; i; i=i->next)
2265 igmp6_group_dropped(i);
2266 read_unlock_bh(&idev->lock);
2268 mld_clear_delrec(idev);
2272 /* Device going up */
2274 void ipv6_mc_up(struct inet6_dev *idev)
2276 struct ifmcaddr6 *i;
2278 /* Install multicast list, except for all-nodes (already installed) */
2280 read_lock_bh(&idev->lock);
2281 for (i = idev->mc_list; i; i=i->next)
2282 igmp6_group_added(i);
2283 read_unlock_bh(&idev->lock);
2286 /* IPv6 device initialization. */
2288 void ipv6_mc_init_dev(struct inet6_dev *idev)
2290 write_lock_bh(&idev->lock);
2291 rwlock_init(&idev->mc_lock);
2292 idev->mc_gq_running = 0;
2293 setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire,
2294 (unsigned long)idev);
2295 idev->mc_tomb = NULL;
2296 idev->mc_ifc_count = 0;
2297 setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire,
2298 (unsigned long)idev);
2299 idev->mc_qrv = MLD_QRV_DEFAULT;
2300 idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL;
2301 idev->mc_v1_seen = 0;
2302 write_unlock_bh(&idev->lock);
2306 * Device is about to be destroyed: clean up.
2309 void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2311 struct ifmcaddr6 *i;
2312 struct in6_addr maddr;
2314 /* Deactivate timers */
2317 /* Delete all-nodes address. */
2318 ipv6_addr_all_nodes(&maddr);
2320 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2321 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2324 __ipv6_dev_mc_dec(idev, &maddr);
2326 if (idev->cnf.forwarding) {
2327 ipv6_addr_all_routers(&maddr);
2328 __ipv6_dev_mc_dec(idev, &maddr);
2331 write_lock_bh(&idev->lock);
2332 while ((i = idev->mc_list) != NULL) {
2333 idev->mc_list = i->next;
2334 write_unlock_bh(&idev->lock);
2336 igmp6_group_dropped(i);
2339 write_lock_bh(&idev->lock);
2341 write_unlock_bh(&idev->lock);
2344 #ifdef CONFIG_PROC_FS
2345 struct igmp6_mc_iter_state {
2346 struct seq_net_private p;
2347 struct net_device *dev;
2348 struct inet6_dev *idev;
2351 #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2353 static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
2355 struct ifmcaddr6 *im = NULL;
2356 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2357 struct net *net = seq_file_net(seq);
2360 for_each_netdev(net, state->dev) {
2361 struct inet6_dev *idev;
2362 idev = in6_dev_get(state->dev);
2365 read_lock_bh(&idev->lock);
2371 read_unlock_bh(&idev->lock);
2377 static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
2379 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2383 if (likely(state->idev != NULL)) {
2384 read_unlock_bh(&state->idev->lock);
2385 in6_dev_put(state->idev);
2387 state->dev = next_net_device(state->dev);
2392 state->idev = in6_dev_get(state->dev);
2395 read_lock_bh(&state->idev->lock);
2396 im = state->idev->mc_list;
2401 static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2403 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2405 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2407 return pos ? NULL : im;
2410 static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
2411 __acquires(dev_base_lock)
2413 read_lock(&dev_base_lock);
2414 return igmp6_mc_get_idx(seq, *pos);
2417 static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2419 struct ifmcaddr6 *im;
2420 im = igmp6_mc_get_next(seq, v);
2425 static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
2426 __releases(dev_base_lock)
2428 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2429 if (likely(state->idev != NULL)) {
2430 read_unlock_bh(&state->idev->lock);
2431 in6_dev_put(state->idev);
2435 read_unlock(&dev_base_lock);
2438 static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
2440 struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
2441 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2444 "%-4d %-15s " NIP6_SEQFMT " %5d %08X %ld\n",
2445 state->dev->ifindex, state->dev->name,
2447 im->mca_users, im->mca_flags,
2448 (im->mca_flags&MAF_TIMER_RUNNING) ?
2449 jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
2453 static const struct seq_operations igmp6_mc_seq_ops = {
2454 .start = igmp6_mc_seq_start,
2455 .next = igmp6_mc_seq_next,
2456 .stop = igmp6_mc_seq_stop,
2457 .show = igmp6_mc_seq_show,
2460 static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
2462 return seq_open_net(inode, file, &igmp6_mc_seq_ops,
2463 sizeof(struct igmp6_mc_iter_state));
2466 static const struct file_operations igmp6_mc_seq_fops = {
2467 .owner = THIS_MODULE,
2468 .open = igmp6_mc_seq_open,
2470 .llseek = seq_lseek,
2471 .release = seq_release_net,
2474 struct igmp6_mcf_iter_state {
2475 struct seq_net_private p;
2476 struct net_device *dev;
2477 struct inet6_dev *idev;
2478 struct ifmcaddr6 *im;
2481 #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2483 static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
2485 struct ip6_sf_list *psf = NULL;
2486 struct ifmcaddr6 *im = NULL;
2487 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2488 struct net *net = seq_file_net(seq);
2492 for_each_netdev(net, state->dev) {
2493 struct inet6_dev *idev;
2494 idev = in6_dev_get(state->dev);
2495 if (unlikely(idev == NULL))
2497 read_lock_bh(&idev->lock);
2499 if (likely(im != NULL)) {
2500 spin_lock_bh(&im->mca_lock);
2501 psf = im->mca_sources;
2502 if (likely(psf != NULL)) {
2507 spin_unlock_bh(&im->mca_lock);
2509 read_unlock_bh(&idev->lock);
2515 static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
2517 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2521 spin_unlock_bh(&state->im->mca_lock);
2522 state->im = state->im->next;
2523 while (!state->im) {
2524 if (likely(state->idev != NULL)) {
2525 read_unlock_bh(&state->idev->lock);
2526 in6_dev_put(state->idev);
2528 state->dev = next_net_device(state->dev);
2533 state->idev = in6_dev_get(state->dev);
2536 read_lock_bh(&state->idev->lock);
2537 state->im = state->idev->mc_list;
2541 spin_lock_bh(&state->im->mca_lock);
2542 psf = state->im->mca_sources;
2548 static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2550 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2552 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2554 return pos ? NULL : psf;
2557 static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
2558 __acquires(dev_base_lock)
2560 read_lock(&dev_base_lock);
2561 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2564 static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2566 struct ip6_sf_list *psf;
2567 if (v == SEQ_START_TOKEN)
2568 psf = igmp6_mcf_get_first(seq);
2570 psf = igmp6_mcf_get_next(seq, v);
2575 static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
2576 __releases(dev_base_lock)
2578 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2579 if (likely(state->im != NULL)) {
2580 spin_unlock_bh(&state->im->mca_lock);
2583 if (likely(state->idev != NULL)) {
2584 read_unlock_bh(&state->idev->lock);
2585 in6_dev_put(state->idev);
2589 read_unlock(&dev_base_lock);
2592 static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
2594 struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
2595 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2597 if (v == SEQ_START_TOKEN) {
2600 "%32s %32s %6s %6s\n", "Idx",
2601 "Device", "Multicast Address",
2602 "Source Address", "INC", "EXC");
2605 "%3d %6.6s " NIP6_SEQFMT " " NIP6_SEQFMT " %6lu %6lu\n",
2606 state->dev->ifindex, state->dev->name,
2607 NIP6(state->im->mca_addr),
2609 psf->sf_count[MCAST_INCLUDE],
2610 psf->sf_count[MCAST_EXCLUDE]);
2615 static const struct seq_operations igmp6_mcf_seq_ops = {
2616 .start = igmp6_mcf_seq_start,
2617 .next = igmp6_mcf_seq_next,
2618 .stop = igmp6_mcf_seq_stop,
2619 .show = igmp6_mcf_seq_show,
2622 static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
2624 return seq_open_net(inode, file, &igmp6_mcf_seq_ops,
2625 sizeof(struct igmp6_mcf_iter_state));
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_net,
2636 static int igmp6_proc_init(struct net *net)
2641 if (!proc_net_fops_create(net, "igmp6", S_IRUGO, &igmp6_mc_seq_fops))
2643 if (!proc_net_fops_create(net, "mcfilter6", S_IRUGO,
2644 &igmp6_mcf_seq_fops))
2645 goto out_proc_net_igmp6;
2652 proc_net_remove(net, "igmp6");
2656 static void igmp6_proc_exit(struct net *net)
2658 proc_net_remove(net, "mcfilter6");
2659 proc_net_remove(net, "igmp6");
2662 static int igmp6_proc_init(struct net *net)
2666 static void igmp6_proc_exit(struct net *net)
2672 static int igmp6_net_init(struct net *net)
2676 err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6,
2677 SOCK_RAW, IPPROTO_ICMPV6, net);
2680 "Failed to initialize the IGMP6 control socket (err %d).\n",
2685 inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1;
2687 err = igmp6_proc_init(net);
2689 goto out_sock_create;
2694 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
2698 static void igmp6_net_exit(struct net *net)
2700 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
2701 igmp6_proc_exit(net);
2704 static struct pernet_operations igmp6_net_ops = {
2705 .init = igmp6_net_init,
2706 .exit = igmp6_net_exit,
2709 int __init igmp6_init(void)
2711 return register_pernet_subsys(&igmp6_net_ops);
2714 void igmp6_cleanup(void)
2716 unregister_pernet_subsys(&igmp6_net_ops);