2 * Multicast support for IPv6
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
18 * yoshfuji : fix format of router-alert option
19 * YOSHIFUJI Hideaki @USAGI:
20 * Fixed source address for MLD message based on
21 * <draft-ietf-magma-mld-source-05.txt>.
22 * YOSHIFUJI Hideaki @USAGI:
23 * - Ignore Queries for invalid addresses.
24 * - MLD for link-local addresses.
25 * David L Stevens <dlstevens@us.ibm.com>:
29 #include <linux/module.h>
30 #include <linux/errno.h>
31 #include <linux/types.h>
32 #include <linux/string.h>
33 #include <linux/socket.h>
34 #include <linux/sockios.h>
35 #include <linux/jiffies.h>
36 #include <linux/times.h>
37 #include <linux/net.h>
39 #include <linux/in6.h>
40 #include <linux/netdevice.h>
41 #include <linux/if_arp.h>
42 #include <linux/route.h>
43 #include <linux/init.h>
44 #include <linux/proc_fs.h>
45 #include <linux/seq_file.h>
46 #include <linux/slab.h>
48 #include <linux/netfilter.h>
49 #include <linux/netfilter_ipv6.h>
51 #include <net/net_namespace.h>
56 #include <net/protocol.h>
57 #include <net/if_inet6.h>
58 #include <net/ndisc.h>
59 #include <net/addrconf.h>
60 #include <net/ip6_route.h>
61 #include <net/inet_common.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 void igmp6_join_group(struct ifmcaddr6
*ma
);
130 static void igmp6_leave_group(struct ifmcaddr6
*ma
);
131 static void igmp6_timer_handler(unsigned long data
);
133 static void mld_gq_timer_expire(unsigned long data
);
134 static void mld_ifc_timer_expire(unsigned long data
);
135 static void mld_ifc_event(struct inet6_dev
*idev
);
136 static void mld_add_delrec(struct inet6_dev
*idev
, struct ifmcaddr6
*pmc
);
137 static void mld_del_delrec(struct inet6_dev
*idev
, struct in6_addr
*addr
);
138 static void mld_clear_delrec(struct inet6_dev
*idev
);
139 static int sf_setstate(struct ifmcaddr6
*pmc
);
140 static void sf_markstate(struct ifmcaddr6
*pmc
);
141 static void ip6_mc_clear_src(struct ifmcaddr6
*pmc
);
142 static int ip6_mc_del_src(struct inet6_dev
*idev
, struct in6_addr
*pmca
,
143 int sfmode
, int sfcount
, struct in6_addr
*psfsrc
,
145 static int ip6_mc_add_src(struct inet6_dev
*idev
, struct in6_addr
*pmca
,
146 int sfmode
, int sfcount
, struct in6_addr
*psfsrc
,
148 static int ip6_mc_leave_src(struct sock
*sk
, struct ipv6_mc_socklist
*iml
,
149 struct inet6_dev
*idev
);
152 #define IGMP6_UNSOLICITED_IVAL (10*HZ)
153 #define MLD_QRV_DEFAULT 2
155 #define MLD_V1_SEEN(idev) (dev_net((idev)->dev)->ipv6.devconf_all->force_mld_version == 1 || \
156 (idev)->cnf.force_mld_version == 1 || \
157 ((idev)->mc_v1_seen && \
158 time_before(jiffies, (idev)->mc_v1_seen)))
160 #define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value))
161 #define MLDV2_EXP(thresh, nbmant, nbexp, value) \
162 ((value) < (thresh) ? (value) : \
163 ((MLDV2_MASK(value, nbmant) | (1<<(nbmant))) << \
164 (MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp))))
166 #define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value)
168 #define IPV6_MLD_MAX_MSF 64
170 int sysctl_mld_max_msf __read_mostly
= IPV6_MLD_MAX_MSF
;
173 * socket join on multicast group
176 int ipv6_sock_mc_join(struct sock
*sk
, int ifindex
, const struct in6_addr
*addr
)
178 struct net_device
*dev
= NULL
;
179 struct ipv6_mc_socklist
*mc_lst
;
180 struct ipv6_pinfo
*np
= inet6_sk(sk
);
181 struct net
*net
= sock_net(sk
);
184 if (!ipv6_addr_is_multicast(addr
))
187 read_lock_bh(&ipv6_sk_mc_lock
);
188 for (mc_lst
=np
->ipv6_mc_list
; mc_lst
; mc_lst
=mc_lst
->next
) {
189 if ((ifindex
== 0 || mc_lst
->ifindex
== ifindex
) &&
190 ipv6_addr_equal(&mc_lst
->addr
, addr
)) {
191 read_unlock_bh(&ipv6_sk_mc_lock
);
195 read_unlock_bh(&ipv6_sk_mc_lock
);
197 mc_lst
= sock_kmalloc(sk
, sizeof(struct ipv6_mc_socklist
), GFP_KERNEL
);
203 ipv6_addr_copy(&mc_lst
->addr
, addr
);
207 rt
= rt6_lookup(net
, addr
, NULL
, 0, 0);
211 dst_release(&rt
->u
.dst
);
214 dev
= dev_get_by_index(net
, ifindex
);
217 sock_kfree_s(sk
, mc_lst
, sizeof(*mc_lst
));
221 mc_lst
->ifindex
= dev
->ifindex
;
222 mc_lst
->sfmode
= MCAST_EXCLUDE
;
223 rwlock_init(&mc_lst
->sflock
);
224 mc_lst
->sflist
= NULL
;
227 * now add/increase the group membership on the device
230 err
= ipv6_dev_mc_inc(dev
, addr
);
233 sock_kfree_s(sk
, mc_lst
, sizeof(*mc_lst
));
238 write_lock_bh(&ipv6_sk_mc_lock
);
239 mc_lst
->next
= np
->ipv6_mc_list
;
240 np
->ipv6_mc_list
= mc_lst
;
241 write_unlock_bh(&ipv6_sk_mc_lock
);
249 * socket leave on multicast group
251 int ipv6_sock_mc_drop(struct sock
*sk
, int ifindex
, const struct in6_addr
*addr
)
253 struct ipv6_pinfo
*np
= inet6_sk(sk
);
254 struct ipv6_mc_socklist
*mc_lst
, **lnk
;
255 struct net
*net
= sock_net(sk
);
257 write_lock_bh(&ipv6_sk_mc_lock
);
258 for (lnk
= &np
->ipv6_mc_list
; (mc_lst
= *lnk
) !=NULL
; lnk
= &mc_lst
->next
) {
259 if ((ifindex
== 0 || mc_lst
->ifindex
== ifindex
) &&
260 ipv6_addr_equal(&mc_lst
->addr
, addr
)) {
261 struct net_device
*dev
;
264 write_unlock_bh(&ipv6_sk_mc_lock
);
266 dev
= dev_get_by_index(net
, mc_lst
->ifindex
);
268 struct inet6_dev
*idev
= in6_dev_get(dev
);
270 (void) ip6_mc_leave_src(sk
, mc_lst
, idev
);
272 __ipv6_dev_mc_dec(idev
, &mc_lst
->addr
);
277 (void) ip6_mc_leave_src(sk
, mc_lst
, NULL
);
278 sock_kfree_s(sk
, mc_lst
, sizeof(*mc_lst
));
282 write_unlock_bh(&ipv6_sk_mc_lock
);
284 return -EADDRNOTAVAIL
;
287 static struct inet6_dev
*ip6_mc_find_dev(struct net
*net
,
288 struct in6_addr
*group
,
291 struct net_device
*dev
= NULL
;
292 struct inet6_dev
*idev
= NULL
;
297 rt
= rt6_lookup(net
, group
, NULL
, 0, 0);
301 dst_release(&rt
->u
.dst
);
304 dev
= dev_get_by_index(net
, ifindex
);
308 idev
= in6_dev_get(dev
);
311 read_lock_bh(&idev
->lock
);
318 read_unlock_bh(&idev
->lock
);
326 void ipv6_sock_mc_close(struct sock
*sk
)
328 struct ipv6_pinfo
*np
= inet6_sk(sk
);
329 struct ipv6_mc_socklist
*mc_lst
;
330 struct net
*net
= sock_net(sk
);
332 write_lock_bh(&ipv6_sk_mc_lock
);
333 while ((mc_lst
= np
->ipv6_mc_list
) != NULL
) {
334 struct net_device
*dev
;
336 np
->ipv6_mc_list
= mc_lst
->next
;
337 write_unlock_bh(&ipv6_sk_mc_lock
);
339 dev
= dev_get_by_index(net
, mc_lst
->ifindex
);
341 struct inet6_dev
*idev
= in6_dev_get(dev
);
343 (void) ip6_mc_leave_src(sk
, mc_lst
, idev
);
345 __ipv6_dev_mc_dec(idev
, &mc_lst
->addr
);
350 (void) ip6_mc_leave_src(sk
, mc_lst
, NULL
);
352 sock_kfree_s(sk
, mc_lst
, sizeof(*mc_lst
));
354 write_lock_bh(&ipv6_sk_mc_lock
);
356 write_unlock_bh(&ipv6_sk_mc_lock
);
359 int ip6_mc_source(int add
, int omode
, struct sock
*sk
,
360 struct group_source_req
*pgsr
)
362 struct in6_addr
*source
, *group
;
363 struct ipv6_mc_socklist
*pmc
;
364 struct net_device
*dev
;
365 struct inet6_dev
*idev
;
366 struct ipv6_pinfo
*inet6
= inet6_sk(sk
);
367 struct ip6_sf_socklist
*psl
;
368 struct net
*net
= sock_net(sk
);
374 source
= &((struct sockaddr_in6
*)&pgsr
->gsr_source
)->sin6_addr
;
375 group
= &((struct sockaddr_in6
*)&pgsr
->gsr_group
)->sin6_addr
;
377 if (!ipv6_addr_is_multicast(group
))
380 idev
= ip6_mc_find_dev(net
, group
, pgsr
->gsr_interface
);
385 err
= -EADDRNOTAVAIL
;
387 read_lock_bh(&ipv6_sk_mc_lock
);
388 for (pmc
=inet6
->ipv6_mc_list
; pmc
; pmc
=pmc
->next
) {
389 if (pgsr
->gsr_interface
&& pmc
->ifindex
!= pgsr
->gsr_interface
)
391 if (ipv6_addr_equal(&pmc
->addr
, group
))
394 if (!pmc
) { /* must have a prior join */
398 /* if a source filter was set, must be the same mode as before */
400 if (pmc
->sfmode
!= omode
) {
404 } else if (pmc
->sfmode
!= omode
) {
405 /* allow mode switches for empty-set filters */
406 ip6_mc_add_src(idev
, group
, omode
, 0, NULL
, 0);
407 ip6_mc_del_src(idev
, group
, pmc
->sfmode
, 0, NULL
, 0);
411 write_lock_bh(&pmc
->sflock
);
417 goto done
; /* err = -EADDRNOTAVAIL */
419 for (i
=0; i
<psl
->sl_count
; i
++) {
420 rv
= memcmp(&psl
->sl_addr
[i
], source
,
421 sizeof(struct in6_addr
));
425 if (rv
) /* source not found */
426 goto done
; /* err = -EADDRNOTAVAIL */
428 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
429 if (psl
->sl_count
== 1 && omode
== MCAST_INCLUDE
) {
434 /* update the interface filter */
435 ip6_mc_del_src(idev
, group
, omode
, 1, source
, 1);
437 for (j
=i
+1; j
<psl
->sl_count
; j
++)
438 psl
->sl_addr
[j
-1] = psl
->sl_addr
[j
];
443 /* else, add a new source to the filter */
445 if (psl
&& psl
->sl_count
>= sysctl_mld_max_msf
) {
449 if (!psl
|| psl
->sl_count
== psl
->sl_max
) {
450 struct ip6_sf_socklist
*newpsl
;
451 int count
= IP6_SFBLOCK
;
454 count
+= psl
->sl_max
;
455 newpsl
= sock_kmalloc(sk
, IP6_SFLSIZE(count
), GFP_ATOMIC
);
460 newpsl
->sl_max
= count
;
461 newpsl
->sl_count
= count
- IP6_SFBLOCK
;
463 for (i
=0; i
<psl
->sl_count
; i
++)
464 newpsl
->sl_addr
[i
] = psl
->sl_addr
[i
];
465 sock_kfree_s(sk
, psl
, IP6_SFLSIZE(psl
->sl_max
));
467 pmc
->sflist
= psl
= newpsl
;
469 rv
= 1; /* > 0 for insert logic below if sl_count is 0 */
470 for (i
=0; i
<psl
->sl_count
; i
++) {
471 rv
= memcmp(&psl
->sl_addr
[i
], source
, sizeof(struct in6_addr
));
475 if (rv
== 0) /* address already there is an error */
477 for (j
=psl
->sl_count
-1; j
>=i
; j
--)
478 psl
->sl_addr
[j
+1] = psl
->sl_addr
[j
];
479 psl
->sl_addr
[i
] = *source
;
482 /* update the interface list */
483 ip6_mc_add_src(idev
, group
, omode
, 1, source
, 1);
486 write_unlock_bh(&pmc
->sflock
);
487 read_unlock_bh(&ipv6_sk_mc_lock
);
488 read_unlock_bh(&idev
->lock
);
492 return ipv6_sock_mc_drop(sk
, pgsr
->gsr_interface
, group
);
496 int ip6_mc_msfilter(struct sock
*sk
, struct group_filter
*gsf
)
498 struct in6_addr
*group
;
499 struct ipv6_mc_socklist
*pmc
;
500 struct net_device
*dev
;
501 struct inet6_dev
*idev
;
502 struct ipv6_pinfo
*inet6
= inet6_sk(sk
);
503 struct ip6_sf_socklist
*newpsl
, *psl
;
504 struct net
*net
= sock_net(sk
);
508 group
= &((struct sockaddr_in6
*)&gsf
->gf_group
)->sin6_addr
;
510 if (!ipv6_addr_is_multicast(group
))
512 if (gsf
->gf_fmode
!= MCAST_INCLUDE
&&
513 gsf
->gf_fmode
!= MCAST_EXCLUDE
)
516 idev
= ip6_mc_find_dev(net
, group
, gsf
->gf_interface
);
523 read_lock_bh(&ipv6_sk_mc_lock
);
525 if (gsf
->gf_fmode
== MCAST_INCLUDE
&& gsf
->gf_numsrc
== 0) {
530 for (pmc
=inet6
->ipv6_mc_list
; pmc
; pmc
=pmc
->next
) {
531 if (pmc
->ifindex
!= gsf
->gf_interface
)
533 if (ipv6_addr_equal(&pmc
->addr
, group
))
536 if (!pmc
) { /* must have a prior join */
540 if (gsf
->gf_numsrc
) {
541 newpsl
= sock_kmalloc(sk
, IP6_SFLSIZE(gsf
->gf_numsrc
),
547 newpsl
->sl_max
= newpsl
->sl_count
= gsf
->gf_numsrc
;
548 for (i
=0; i
<newpsl
->sl_count
; ++i
) {
549 struct sockaddr_in6
*psin6
;
551 psin6
= (struct sockaddr_in6
*)&gsf
->gf_slist
[i
];
552 newpsl
->sl_addr
[i
] = psin6
->sin6_addr
;
554 err
= ip6_mc_add_src(idev
, group
, gsf
->gf_fmode
,
555 newpsl
->sl_count
, newpsl
->sl_addr
, 0);
557 sock_kfree_s(sk
, newpsl
, IP6_SFLSIZE(newpsl
->sl_max
));
562 (void) ip6_mc_add_src(idev
, group
, gsf
->gf_fmode
, 0, NULL
, 0);
565 write_lock_bh(&pmc
->sflock
);
568 (void) ip6_mc_del_src(idev
, group
, pmc
->sfmode
,
569 psl
->sl_count
, psl
->sl_addr
, 0);
570 sock_kfree_s(sk
, psl
, IP6_SFLSIZE(psl
->sl_max
));
572 (void) ip6_mc_del_src(idev
, group
, pmc
->sfmode
, 0, NULL
, 0);
573 pmc
->sflist
= newpsl
;
574 pmc
->sfmode
= gsf
->gf_fmode
;
575 write_unlock_bh(&pmc
->sflock
);
578 read_unlock_bh(&ipv6_sk_mc_lock
);
579 read_unlock_bh(&idev
->lock
);
583 err
= ipv6_sock_mc_drop(sk
, gsf
->gf_interface
, group
);
587 int ip6_mc_msfget(struct sock
*sk
, struct group_filter
*gsf
,
588 struct group_filter __user
*optval
, int __user
*optlen
)
590 int err
, i
, count
, copycount
;
591 struct in6_addr
*group
;
592 struct ipv6_mc_socklist
*pmc
;
593 struct inet6_dev
*idev
;
594 struct net_device
*dev
;
595 struct ipv6_pinfo
*inet6
= inet6_sk(sk
);
596 struct ip6_sf_socklist
*psl
;
597 struct net
*net
= sock_net(sk
);
599 group
= &((struct sockaddr_in6
*)&gsf
->gf_group
)->sin6_addr
;
601 if (!ipv6_addr_is_multicast(group
))
604 idev
= ip6_mc_find_dev(net
, group
, gsf
->gf_interface
);
611 err
= -EADDRNOTAVAIL
;
613 * changes to the ipv6_mc_list require the socket lock and
614 * a read lock on ip6_sk_mc_lock. We have the socket lock,
615 * so reading the list is safe.
618 for (pmc
=inet6
->ipv6_mc_list
; pmc
; pmc
=pmc
->next
) {
619 if (pmc
->ifindex
!= gsf
->gf_interface
)
621 if (ipv6_addr_equal(group
, &pmc
->addr
))
624 if (!pmc
) /* must have a prior join */
626 gsf
->gf_fmode
= pmc
->sfmode
;
628 count
= psl
? psl
->sl_count
: 0;
629 read_unlock_bh(&idev
->lock
);
633 copycount
= count
< gsf
->gf_numsrc
? count
: gsf
->gf_numsrc
;
634 gsf
->gf_numsrc
= count
;
635 if (put_user(GROUP_FILTER_SIZE(copycount
), optlen
) ||
636 copy_to_user(optval
, gsf
, GROUP_FILTER_SIZE(0))) {
639 /* changes to psl require the socket lock, a read lock on
640 * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We
641 * have the socket lock, so reading here is safe.
643 for (i
=0; i
<copycount
; i
++) {
644 struct sockaddr_in6
*psin6
;
645 struct sockaddr_storage ss
;
647 psin6
= (struct sockaddr_in6
*)&ss
;
648 memset(&ss
, 0, sizeof(ss
));
649 psin6
->sin6_family
= AF_INET6
;
650 psin6
->sin6_addr
= psl
->sl_addr
[i
];
651 if (copy_to_user(&optval
->gf_slist
[i
], &ss
, sizeof(ss
)))
656 read_unlock_bh(&idev
->lock
);
662 int inet6_mc_check(struct sock
*sk
, const struct in6_addr
*mc_addr
,
663 const struct in6_addr
*src_addr
)
665 struct ipv6_pinfo
*np
= inet6_sk(sk
);
666 struct ipv6_mc_socklist
*mc
;
667 struct ip6_sf_socklist
*psl
;
670 read_lock(&ipv6_sk_mc_lock
);
671 for (mc
= np
->ipv6_mc_list
; mc
; mc
= mc
->next
) {
672 if (ipv6_addr_equal(&mc
->addr
, mc_addr
))
676 read_unlock(&ipv6_sk_mc_lock
);
679 read_lock(&mc
->sflock
);
682 rv
= mc
->sfmode
== MCAST_EXCLUDE
;
686 for (i
=0; i
<psl
->sl_count
; i
++) {
687 if (ipv6_addr_equal(&psl
->sl_addr
[i
], src_addr
))
690 if (mc
->sfmode
== MCAST_INCLUDE
&& i
>= psl
->sl_count
)
692 if (mc
->sfmode
== MCAST_EXCLUDE
&& i
< psl
->sl_count
)
695 read_unlock(&mc
->sflock
);
696 read_unlock(&ipv6_sk_mc_lock
);
701 static void ma_put(struct ifmcaddr6
*mc
)
703 if (atomic_dec_and_test(&mc
->mca_refcnt
)) {
704 in6_dev_put(mc
->idev
);
709 static void igmp6_group_added(struct ifmcaddr6
*mc
)
711 struct net_device
*dev
= mc
->idev
->dev
;
712 char buf
[MAX_ADDR_LEN
];
714 spin_lock_bh(&mc
->mca_lock
);
715 if (!(mc
->mca_flags
&MAF_LOADED
)) {
716 mc
->mca_flags
|= MAF_LOADED
;
717 if (ndisc_mc_map(&mc
->mca_addr
, buf
, dev
, 0) == 0)
718 dev_mc_add(dev
, buf
, dev
->addr_len
, 0);
720 spin_unlock_bh(&mc
->mca_lock
);
722 if (!(dev
->flags
& IFF_UP
) || (mc
->mca_flags
& MAF_NOREPORT
))
725 if (MLD_V1_SEEN(mc
->idev
)) {
726 igmp6_join_group(mc
);
731 mc
->mca_crcount
= mc
->idev
->mc_qrv
;
732 mld_ifc_event(mc
->idev
);
735 static void igmp6_group_dropped(struct ifmcaddr6
*mc
)
737 struct net_device
*dev
= mc
->idev
->dev
;
738 char buf
[MAX_ADDR_LEN
];
740 spin_lock_bh(&mc
->mca_lock
);
741 if (mc
->mca_flags
&MAF_LOADED
) {
742 mc
->mca_flags
&= ~MAF_LOADED
;
743 if (ndisc_mc_map(&mc
->mca_addr
, buf
, dev
, 0) == 0)
744 dev_mc_delete(dev
, buf
, dev
->addr_len
, 0);
747 if (mc
->mca_flags
& MAF_NOREPORT
)
749 spin_unlock_bh(&mc
->mca_lock
);
752 igmp6_leave_group(mc
);
754 spin_lock_bh(&mc
->mca_lock
);
755 if (del_timer(&mc
->mca_timer
))
756 atomic_dec(&mc
->mca_refcnt
);
758 ip6_mc_clear_src(mc
);
759 spin_unlock_bh(&mc
->mca_lock
);
763 * deleted ifmcaddr6 manipulation
765 static void mld_add_delrec(struct inet6_dev
*idev
, struct ifmcaddr6
*im
)
767 struct ifmcaddr6
*pmc
;
769 /* this is an "ifmcaddr6" for convenience; only the fields below
770 * are actually used. In particular, the refcnt and users are not
771 * used for management of the delete list. Using the same structure
772 * for deleted items allows change reports to use common code with
773 * non-deleted or query-response MCA's.
775 pmc
= kzalloc(sizeof(*pmc
), GFP_ATOMIC
);
779 spin_lock_bh(&im
->mca_lock
);
780 spin_lock_init(&pmc
->mca_lock
);
781 pmc
->idev
= im
->idev
;
783 pmc
->mca_addr
= im
->mca_addr
;
784 pmc
->mca_crcount
= idev
->mc_qrv
;
785 pmc
->mca_sfmode
= im
->mca_sfmode
;
786 if (pmc
->mca_sfmode
== MCAST_INCLUDE
) {
787 struct ip6_sf_list
*psf
;
789 pmc
->mca_tomb
= im
->mca_tomb
;
790 pmc
->mca_sources
= im
->mca_sources
;
791 im
->mca_tomb
= im
->mca_sources
= NULL
;
792 for (psf
=pmc
->mca_sources
; psf
; psf
=psf
->sf_next
)
793 psf
->sf_crcount
= pmc
->mca_crcount
;
795 spin_unlock_bh(&im
->mca_lock
);
797 spin_lock_bh(&idev
->mc_lock
);
798 pmc
->next
= idev
->mc_tomb
;
800 spin_unlock_bh(&idev
->mc_lock
);
803 static void mld_del_delrec(struct inet6_dev
*idev
, struct in6_addr
*pmca
)
805 struct ifmcaddr6
*pmc
, *pmc_prev
;
806 struct ip6_sf_list
*psf
, *psf_next
;
808 spin_lock_bh(&idev
->mc_lock
);
810 for (pmc
=idev
->mc_tomb
; pmc
; pmc
=pmc
->next
) {
811 if (ipv6_addr_equal(&pmc
->mca_addr
, pmca
))
817 pmc_prev
->next
= pmc
->next
;
819 idev
->mc_tomb
= pmc
->next
;
821 spin_unlock_bh(&idev
->mc_lock
);
824 for (psf
=pmc
->mca_tomb
; psf
; psf
=psf_next
) {
825 psf_next
= psf
->sf_next
;
828 in6_dev_put(pmc
->idev
);
833 static void mld_clear_delrec(struct inet6_dev
*idev
)
835 struct ifmcaddr6
*pmc
, *nextpmc
;
837 spin_lock_bh(&idev
->mc_lock
);
839 idev
->mc_tomb
= NULL
;
840 spin_unlock_bh(&idev
->mc_lock
);
842 for (; pmc
; pmc
= nextpmc
) {
844 ip6_mc_clear_src(pmc
);
845 in6_dev_put(pmc
->idev
);
849 /* clear dead sources, too */
850 read_lock_bh(&idev
->lock
);
851 for (pmc
=idev
->mc_list
; pmc
; pmc
=pmc
->next
) {
852 struct ip6_sf_list
*psf
, *psf_next
;
854 spin_lock_bh(&pmc
->mca_lock
);
856 pmc
->mca_tomb
= NULL
;
857 spin_unlock_bh(&pmc
->mca_lock
);
858 for (; psf
; psf
=psf_next
) {
859 psf_next
= psf
->sf_next
;
863 read_unlock_bh(&idev
->lock
);
868 * device multicast group inc (add if not found)
870 int ipv6_dev_mc_inc(struct net_device
*dev
, const struct in6_addr
*addr
)
872 struct ifmcaddr6
*mc
;
873 struct inet6_dev
*idev
;
875 idev
= in6_dev_get(dev
);
880 write_lock_bh(&idev
->lock
);
882 write_unlock_bh(&idev
->lock
);
887 for (mc
= idev
->mc_list
; mc
; mc
= mc
->next
) {
888 if (ipv6_addr_equal(&mc
->mca_addr
, addr
)) {
890 write_unlock_bh(&idev
->lock
);
891 ip6_mc_add_src(idev
, &mc
->mca_addr
, MCAST_EXCLUDE
, 0,
899 * not found: create a new one.
902 mc
= kzalloc(sizeof(struct ifmcaddr6
), GFP_ATOMIC
);
905 write_unlock_bh(&idev
->lock
);
910 setup_timer(&mc
->mca_timer
, igmp6_timer_handler
, (unsigned long)mc
);
912 ipv6_addr_copy(&mc
->mca_addr
, addr
);
915 /* mca_stamp should be updated upon changes */
916 mc
->mca_cstamp
= mc
->mca_tstamp
= jiffies
;
917 atomic_set(&mc
->mca_refcnt
, 2);
918 spin_lock_init(&mc
->mca_lock
);
920 /* initial mode is (EX, empty) */
921 mc
->mca_sfmode
= MCAST_EXCLUDE
;
922 mc
->mca_sfcount
[MCAST_EXCLUDE
] = 1;
924 if (ipv6_addr_is_ll_all_nodes(&mc
->mca_addr
) ||
925 IPV6_ADDR_MC_SCOPE(&mc
->mca_addr
) < IPV6_ADDR_SCOPE_LINKLOCAL
)
926 mc
->mca_flags
|= MAF_NOREPORT
;
928 mc
->next
= idev
->mc_list
;
930 write_unlock_bh(&idev
->lock
);
932 mld_del_delrec(idev
, &mc
->mca_addr
);
933 igmp6_group_added(mc
);
939 * device multicast group del
941 int __ipv6_dev_mc_dec(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
943 struct ifmcaddr6
*ma
, **map
;
945 write_lock_bh(&idev
->lock
);
946 for (map
= &idev
->mc_list
; (ma
=*map
) != NULL
; map
= &ma
->next
) {
947 if (ipv6_addr_equal(&ma
->mca_addr
, addr
)) {
948 if (--ma
->mca_users
== 0) {
950 write_unlock_bh(&idev
->lock
);
952 igmp6_group_dropped(ma
);
957 write_unlock_bh(&idev
->lock
);
961 write_unlock_bh(&idev
->lock
);
966 int ipv6_dev_mc_dec(struct net_device
*dev
, const struct in6_addr
*addr
)
968 struct inet6_dev
*idev
= in6_dev_get(dev
);
974 err
= __ipv6_dev_mc_dec(idev
, addr
);
982 * identify MLD packets for MLD filter exceptions
984 int ipv6_is_mld(struct sk_buff
*skb
, int nexthdr
)
986 struct icmp6hdr
*pic
;
988 if (nexthdr
!= IPPROTO_ICMPV6
)
991 if (!pskb_may_pull(skb
, sizeof(struct icmp6hdr
)))
994 pic
= icmp6_hdr(skb
);
996 switch (pic
->icmp6_type
) {
997 case ICMPV6_MGM_QUERY
:
998 case ICMPV6_MGM_REPORT
:
999 case ICMPV6_MGM_REDUCTION
:
1000 case ICMPV6_MLD2_REPORT
:
1009 * check if the interface/address pair is valid
1011 int ipv6_chk_mcast_addr(struct net_device
*dev
, const struct in6_addr
*group
,
1012 const struct in6_addr
*src_addr
)
1014 struct inet6_dev
*idev
;
1015 struct ifmcaddr6
*mc
;
1018 idev
= in6_dev_get(dev
);
1020 read_lock_bh(&idev
->lock
);
1021 for (mc
= idev
->mc_list
; mc
; mc
=mc
->next
) {
1022 if (ipv6_addr_equal(&mc
->mca_addr
, group
))
1026 if (src_addr
&& !ipv6_addr_any(src_addr
)) {
1027 struct ip6_sf_list
*psf
;
1029 spin_lock_bh(&mc
->mca_lock
);
1030 for (psf
=mc
->mca_sources
;psf
;psf
=psf
->sf_next
) {
1031 if (ipv6_addr_equal(&psf
->sf_addr
, src_addr
))
1035 rv
= psf
->sf_count
[MCAST_INCLUDE
] ||
1036 psf
->sf_count
[MCAST_EXCLUDE
] !=
1037 mc
->mca_sfcount
[MCAST_EXCLUDE
];
1039 rv
= mc
->mca_sfcount
[MCAST_EXCLUDE
] !=0;
1040 spin_unlock_bh(&mc
->mca_lock
);
1042 rv
= 1; /* don't filter unspecified source */
1044 read_unlock_bh(&idev
->lock
);
1050 static void mld_gq_start_timer(struct inet6_dev
*idev
)
1052 int tv
= net_random() % idev
->mc_maxdelay
;
1054 idev
->mc_gq_running
= 1;
1055 if (!mod_timer(&idev
->mc_gq_timer
, jiffies
+tv
+2))
1059 static void mld_ifc_start_timer(struct inet6_dev
*idev
, int delay
)
1061 int tv
= net_random() % delay
;
1063 if (!mod_timer(&idev
->mc_ifc_timer
, jiffies
+tv
+2))
1068 * IGMP handling (alias multicast ICMPv6 messages)
1071 static void igmp6_group_queried(struct ifmcaddr6
*ma
, unsigned long resptime
)
1073 unsigned long delay
= resptime
;
1075 /* Do not start timer for these addresses */
1076 if (ipv6_addr_is_ll_all_nodes(&ma
->mca_addr
) ||
1077 IPV6_ADDR_MC_SCOPE(&ma
->mca_addr
) < IPV6_ADDR_SCOPE_LINKLOCAL
)
1080 if (del_timer(&ma
->mca_timer
)) {
1081 atomic_dec(&ma
->mca_refcnt
);
1082 delay
= ma
->mca_timer
.expires
- jiffies
;
1085 if (delay
>= resptime
) {
1087 delay
= net_random() % resptime
;
1091 ma
->mca_timer
.expires
= jiffies
+ delay
;
1092 if (!mod_timer(&ma
->mca_timer
, jiffies
+ delay
))
1093 atomic_inc(&ma
->mca_refcnt
);
1094 ma
->mca_flags
|= MAF_TIMER_RUNNING
;
1097 /* mark EXCLUDE-mode sources */
1098 static int mld_xmarksources(struct ifmcaddr6
*pmc
, int nsrcs
,
1099 struct in6_addr
*srcs
)
1101 struct ip6_sf_list
*psf
;
1105 for (psf
=pmc
->mca_sources
; psf
; psf
=psf
->sf_next
) {
1106 if (scount
== nsrcs
)
1108 for (i
=0; i
<nsrcs
; i
++) {
1109 /* skip inactive filters */
1110 if (pmc
->mca_sfcount
[MCAST_INCLUDE
] ||
1111 pmc
->mca_sfcount
[MCAST_EXCLUDE
] !=
1112 psf
->sf_count
[MCAST_EXCLUDE
])
1114 if (ipv6_addr_equal(&srcs
[i
], &psf
->sf_addr
)) {
1120 pmc
->mca_flags
&= ~MAF_GSQUERY
;
1121 if (scount
== nsrcs
) /* all sources excluded */
1126 static int mld_marksources(struct ifmcaddr6
*pmc
, int nsrcs
,
1127 struct in6_addr
*srcs
)
1129 struct ip6_sf_list
*psf
;
1132 if (pmc
->mca_sfmode
== MCAST_EXCLUDE
)
1133 return mld_xmarksources(pmc
, nsrcs
, srcs
);
1135 /* mark INCLUDE-mode sources */
1138 for (psf
=pmc
->mca_sources
; psf
; psf
=psf
->sf_next
) {
1139 if (scount
== nsrcs
)
1141 for (i
=0; i
<nsrcs
; i
++) {
1142 if (ipv6_addr_equal(&srcs
[i
], &psf
->sf_addr
)) {
1150 pmc
->mca_flags
&= ~MAF_GSQUERY
;
1153 pmc
->mca_flags
|= MAF_GSQUERY
;
1157 int igmp6_event_query(struct sk_buff
*skb
)
1159 struct mld2_query
*mlh2
= NULL
;
1160 struct ifmcaddr6
*ma
;
1161 struct in6_addr
*group
;
1162 unsigned long max_delay
;
1163 struct inet6_dev
*idev
;
1164 struct icmp6hdr
*hdr
;
1169 if (!pskb_may_pull(skb
, sizeof(struct in6_addr
)))
1172 /* compute payload length excluding extension headers */
1173 len
= ntohs(ipv6_hdr(skb
)->payload_len
) + sizeof(struct ipv6hdr
);
1174 len
-= skb_network_header_len(skb
);
1176 /* Drop queries with not link local source */
1177 if (!(ipv6_addr_type(&ipv6_hdr(skb
)->saddr
) & IPV6_ADDR_LINKLOCAL
))
1180 idev
= in6_dev_get(skb
->dev
);
1185 hdr
= icmp6_hdr(skb
);
1186 group
= (struct in6_addr
*) (hdr
+ 1);
1187 group_type
= ipv6_addr_type(group
);
1189 if (group_type
!= IPV6_ADDR_ANY
&&
1190 !(group_type
&IPV6_ADDR_MULTICAST
)) {
1197 /* MLDv1 router present */
1199 /* Translate milliseconds to jiffies */
1200 max_delay
= (ntohs(hdr
->icmp6_maxdelay
)*HZ
)/1000;
1202 switchback
= (idev
->mc_qrv
+ 1) * max_delay
;
1203 idev
->mc_v1_seen
= jiffies
+ switchback
;
1205 /* cancel the interface change timer */
1206 idev
->mc_ifc_count
= 0;
1207 if (del_timer(&idev
->mc_ifc_timer
))
1208 __in6_dev_put(idev
);
1209 /* clear deleted report items */
1210 mld_clear_delrec(idev
);
1211 } else if (len
>= 28) {
1212 int srcs_offset
= sizeof(struct mld2_query
) -
1213 sizeof(struct icmp6hdr
);
1214 if (!pskb_may_pull(skb
, srcs_offset
)) {
1218 mlh2
= (struct mld2_query
*)skb_transport_header(skb
);
1219 max_delay
= (MLDV2_MRC(ntohs(mlh2
->mrc
))*HZ
)/1000;
1222 idev
->mc_maxdelay
= max_delay
;
1224 idev
->mc_qrv
= mlh2
->qrv
;
1225 if (group_type
== IPV6_ADDR_ANY
) { /* general query */
1228 return -EINVAL
; /* no sources allowed */
1230 mld_gq_start_timer(idev
);
1234 /* mark sources to include, if group & source-specific */
1235 if (mlh2
->nsrcs
!= 0) {
1236 if (!pskb_may_pull(skb
, srcs_offset
+
1237 ntohs(mlh2
->nsrcs
) * sizeof(struct in6_addr
))) {
1241 mlh2
= (struct mld2_query
*)skb_transport_header(skb
);
1249 read_lock_bh(&idev
->lock
);
1250 if (group_type
== IPV6_ADDR_ANY
) {
1251 for (ma
= idev
->mc_list
; ma
; ma
=ma
->next
) {
1252 spin_lock_bh(&ma
->mca_lock
);
1253 igmp6_group_queried(ma
, max_delay
);
1254 spin_unlock_bh(&ma
->mca_lock
);
1257 for (ma
= idev
->mc_list
; ma
; ma
=ma
->next
) {
1258 if (!ipv6_addr_equal(group
, &ma
->mca_addr
))
1260 spin_lock_bh(&ma
->mca_lock
);
1261 if (ma
->mca_flags
& MAF_TIMER_RUNNING
) {
1262 /* gsquery <- gsquery && mark */
1264 ma
->mca_flags
&= ~MAF_GSQUERY
;
1266 /* gsquery <- mark */
1268 ma
->mca_flags
|= MAF_GSQUERY
;
1270 ma
->mca_flags
&= ~MAF_GSQUERY
;
1272 if (!(ma
->mca_flags
& MAF_GSQUERY
) ||
1273 mld_marksources(ma
, ntohs(mlh2
->nsrcs
), mlh2
->srcs
))
1274 igmp6_group_queried(ma
, max_delay
);
1275 spin_unlock_bh(&ma
->mca_lock
);
1279 read_unlock_bh(&idev
->lock
);
1286 int igmp6_event_report(struct sk_buff
*skb
)
1288 struct ifmcaddr6
*ma
;
1289 struct in6_addr
*addrp
;
1290 struct inet6_dev
*idev
;
1291 struct icmp6hdr
*hdr
;
1294 /* Our own report looped back. Ignore it. */
1295 if (skb
->pkt_type
== PACKET_LOOPBACK
)
1298 /* send our report if the MC router may not have heard this report */
1299 if (skb
->pkt_type
!= PACKET_MULTICAST
&&
1300 skb
->pkt_type
!= PACKET_BROADCAST
)
1303 if (!pskb_may_pull(skb
, sizeof(struct in6_addr
)))
1306 hdr
= icmp6_hdr(skb
);
1308 /* Drop reports with not link local source */
1309 addr_type
= ipv6_addr_type(&ipv6_hdr(skb
)->saddr
);
1310 if (addr_type
!= IPV6_ADDR_ANY
&&
1311 !(addr_type
&IPV6_ADDR_LINKLOCAL
))
1314 addrp
= (struct in6_addr
*) (hdr
+ 1);
1316 idev
= in6_dev_get(skb
->dev
);
1321 * Cancel the timer for this group
1324 read_lock_bh(&idev
->lock
);
1325 for (ma
= idev
->mc_list
; ma
; ma
=ma
->next
) {
1326 if (ipv6_addr_equal(&ma
->mca_addr
, addrp
)) {
1327 spin_lock(&ma
->mca_lock
);
1328 if (del_timer(&ma
->mca_timer
))
1329 atomic_dec(&ma
->mca_refcnt
);
1330 ma
->mca_flags
&= ~(MAF_LAST_REPORTER
|MAF_TIMER_RUNNING
);
1331 spin_unlock(&ma
->mca_lock
);
1335 read_unlock_bh(&idev
->lock
);
1340 static int is_in(struct ifmcaddr6
*pmc
, struct ip6_sf_list
*psf
, int type
,
1341 int gdeleted
, int sdeleted
)
1344 case MLD2_MODE_IS_INCLUDE
:
1345 case MLD2_MODE_IS_EXCLUDE
:
1346 if (gdeleted
|| sdeleted
)
1348 if (!((pmc
->mca_flags
& MAF_GSQUERY
) && !psf
->sf_gsresp
)) {
1349 if (pmc
->mca_sfmode
== MCAST_INCLUDE
)
1351 /* don't include if this source is excluded
1354 if (psf
->sf_count
[MCAST_INCLUDE
])
1355 return type
== MLD2_MODE_IS_INCLUDE
;
1356 return pmc
->mca_sfcount
[MCAST_EXCLUDE
] ==
1357 psf
->sf_count
[MCAST_EXCLUDE
];
1360 case MLD2_CHANGE_TO_INCLUDE
:
1361 if (gdeleted
|| sdeleted
)
1363 return psf
->sf_count
[MCAST_INCLUDE
] != 0;
1364 case MLD2_CHANGE_TO_EXCLUDE
:
1365 if (gdeleted
|| sdeleted
)
1367 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
] == 0 ||
1368 psf
->sf_count
[MCAST_INCLUDE
])
1370 return pmc
->mca_sfcount
[MCAST_EXCLUDE
] ==
1371 psf
->sf_count
[MCAST_EXCLUDE
];
1372 case MLD2_ALLOW_NEW_SOURCES
:
1373 if (gdeleted
|| !psf
->sf_crcount
)
1375 return (pmc
->mca_sfmode
== MCAST_INCLUDE
) ^ sdeleted
;
1376 case MLD2_BLOCK_OLD_SOURCES
:
1377 if (pmc
->mca_sfmode
== MCAST_INCLUDE
)
1378 return gdeleted
|| (psf
->sf_crcount
&& sdeleted
);
1379 return psf
->sf_crcount
&& !gdeleted
&& !sdeleted
;
1385 mld_scount(struct ifmcaddr6
*pmc
, int type
, int gdeleted
, int sdeleted
)
1387 struct ip6_sf_list
*psf
;
1390 for (psf
=pmc
->mca_sources
; psf
; psf
=psf
->sf_next
) {
1391 if (!is_in(pmc
, psf
, type
, gdeleted
, sdeleted
))
1398 static struct sk_buff
*mld_newpack(struct net_device
*dev
, int size
)
1400 struct net
*net
= dev_net(dev
);
1401 struct sock
*sk
= net
->ipv6
.igmp_sk
;
1402 struct sk_buff
*skb
;
1403 struct mld2_report
*pmr
;
1404 struct in6_addr addr_buf
;
1405 const struct in6_addr
*saddr
;
1407 u8 ra
[8] = { IPPROTO_ICMPV6
, 0,
1408 IPV6_TLV_ROUTERALERT
, 2, 0, 0,
1411 /* we assume size > sizeof(ra) here */
1412 skb
= sock_alloc_send_skb(sk
, size
+ LL_ALLOCATED_SPACE(dev
), 1, &err
);
1417 skb_reserve(skb
, LL_RESERVED_SPACE(dev
));
1419 if (ipv6_get_lladdr(dev
, &addr_buf
, IFA_F_TENTATIVE
)) {
1420 /* <draft-ietf-magma-mld-source-05.txt>:
1421 * use unspecified address as the source address
1422 * when a valid link-local address is not available.
1424 saddr
= &in6addr_any
;
1428 ip6_nd_hdr(sk
, skb
, dev
, saddr
, &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
);
1453 struct dst_entry
*dst
;
1455 IP6_UPD_PO_STATS(net
, idev
, IPSTATS_MIB_OUT
, skb
->len
);
1457 payload_len
= (skb
->tail
- skb
->network_header
) - sizeof(*pip6
);
1458 mldlen
= skb
->tail
- skb
->transport_header
;
1459 pip6
->payload_len
= htons(payload_len
);
1461 pmr
->csum
= csum_ipv6_magic(&pip6
->saddr
, &pip6
->daddr
, mldlen
,
1462 IPPROTO_ICMPV6
, csum_partial(skb_transport_header(skb
),
1465 dst
= icmp6_dst_alloc(skb
->dev
, NULL
, &ipv6_hdr(skb
)->daddr
);
1472 icmpv6_flow_init(net
->ipv6
.igmp_sk
, &fl
, ICMPV6_MLD2_REPORT
,
1473 &ipv6_hdr(skb
)->saddr
, &ipv6_hdr(skb
)->daddr
,
1476 err
= xfrm_lookup(net
, &dst
, &fl
, NULL
, 0);
1477 skb_dst_set(skb
, dst
);
1481 payload_len
= skb
->len
;
1483 err
= NF_HOOK(PF_INET6
, NF_INET_LOCAL_OUT
, skb
, NULL
, skb
->dev
,
1487 ICMP6MSGOUT_INC_STATS_BH(net
, idev
, ICMPV6_MLD2_REPORT
);
1488 ICMP6_INC_STATS_BH(net
, idev
, ICMP6_MIB_OUTMSGS
);
1489 IP6_UPD_PO_STATS_BH(net
, idev
, IPSTATS_MIB_OUTMCAST
, payload_len
);
1491 IP6_INC_STATS_BH(net
, idev
, IPSTATS_MIB_OUTDISCARDS
);
1493 if (likely(idev
!= NULL
))
1502 static int grec_size(struct ifmcaddr6
*pmc
, int type
, int gdel
, int sdel
)
1504 return sizeof(struct mld2_grec
) + 16 * mld_scount(pmc
,type
,gdel
,sdel
);
1507 static struct sk_buff
*add_grhead(struct sk_buff
*skb
, struct ifmcaddr6
*pmc
,
1508 int type
, struct mld2_grec
**ppgr
)
1510 struct net_device
*dev
= pmc
->idev
->dev
;
1511 struct mld2_report
*pmr
;
1512 struct mld2_grec
*pgr
;
1515 skb
= mld_newpack(dev
, dev
->mtu
);
1518 pgr
= (struct mld2_grec
*)skb_put(skb
, sizeof(struct mld2_grec
));
1519 pgr
->grec_type
= type
;
1520 pgr
->grec_auxwords
= 0;
1521 pgr
->grec_nsrcs
= 0;
1522 pgr
->grec_mca
= pmc
->mca_addr
; /* structure copy */
1523 pmr
= (struct mld2_report
*)skb_transport_header(skb
);
1524 pmr
->ngrec
= htons(ntohs(pmr
->ngrec
)+1);
1529 #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
1530 skb_tailroom(skb)) : 0)
1532 static struct sk_buff
*add_grec(struct sk_buff
*skb
, struct ifmcaddr6
*pmc
,
1533 int type
, int gdeleted
, int sdeleted
)
1535 struct net_device
*dev
= pmc
->idev
->dev
;
1536 struct mld2_report
*pmr
;
1537 struct mld2_grec
*pgr
= NULL
;
1538 struct ip6_sf_list
*psf
, *psf_next
, *psf_prev
, **psf_list
;
1539 int scount
, stotal
, first
, isquery
, truncate
;
1541 if (pmc
->mca_flags
& MAF_NOREPORT
)
1544 isquery
= type
== MLD2_MODE_IS_INCLUDE
||
1545 type
== MLD2_MODE_IS_EXCLUDE
;
1546 truncate
= type
== MLD2_MODE_IS_EXCLUDE
||
1547 type
== MLD2_CHANGE_TO_EXCLUDE
;
1549 stotal
= scount
= 0;
1551 psf_list
= sdeleted
? &pmc
->mca_tomb
: &pmc
->mca_sources
;
1556 pmr
= skb
? (struct mld2_report
*)skb_transport_header(skb
) : NULL
;
1558 /* EX and TO_EX get a fresh packet, if needed */
1560 if (pmr
&& pmr
->ngrec
&&
1561 AVAILABLE(skb
) < grec_size(pmc
, type
, gdeleted
, sdeleted
)) {
1564 skb
= mld_newpack(dev
, dev
->mtu
);
1569 for (psf
=*psf_list
; psf
; psf
=psf_next
) {
1570 struct in6_addr
*psrc
;
1572 psf_next
= psf
->sf_next
;
1574 if (!is_in(pmc
, psf
, type
, gdeleted
, sdeleted
)) {
1579 /* clear marks on query responses */
1583 if (AVAILABLE(skb
) < sizeof(*psrc
) +
1584 first
*sizeof(struct mld2_grec
)) {
1585 if (truncate
&& !first
)
1586 break; /* truncate these */
1588 pgr
->grec_nsrcs
= htons(scount
);
1591 skb
= mld_newpack(dev
, dev
->mtu
);
1596 skb
= add_grhead(skb
, pmc
, type
, &pgr
);
1601 psrc
= (struct in6_addr
*)skb_put(skb
, sizeof(*psrc
));
1602 *psrc
= psf
->sf_addr
;
1604 if ((type
== MLD2_ALLOW_NEW_SOURCES
||
1605 type
== MLD2_BLOCK_OLD_SOURCES
) && psf
->sf_crcount
) {
1607 if ((sdeleted
|| gdeleted
) && psf
->sf_crcount
== 0) {
1609 psf_prev
->sf_next
= psf
->sf_next
;
1611 *psf_list
= psf
->sf_next
;
1621 if (type
== MLD2_ALLOW_NEW_SOURCES
||
1622 type
== MLD2_BLOCK_OLD_SOURCES
)
1624 if (pmc
->mca_crcount
|| isquery
) {
1625 /* make sure we have room for group header */
1626 if (skb
&& AVAILABLE(skb
) < sizeof(struct mld2_grec
)) {
1628 skb
= NULL
; /* add_grhead will get a new one */
1630 skb
= add_grhead(skb
, pmc
, type
, &pgr
);
1634 pgr
->grec_nsrcs
= htons(scount
);
1637 pmc
->mca_flags
&= ~MAF_GSQUERY
; /* clear query state */
1641 static void mld_send_report(struct inet6_dev
*idev
, struct ifmcaddr6
*pmc
)
1643 struct sk_buff
*skb
= NULL
;
1647 read_lock_bh(&idev
->lock
);
1648 for (pmc
=idev
->mc_list
; pmc
; pmc
=pmc
->next
) {
1649 if (pmc
->mca_flags
& MAF_NOREPORT
)
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
);
1659 read_unlock_bh(&idev
->lock
);
1661 spin_lock_bh(&pmc
->mca_lock
);
1662 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
])
1663 type
= MLD2_MODE_IS_EXCLUDE
;
1665 type
= MLD2_MODE_IS_INCLUDE
;
1666 skb
= add_grec(skb
, pmc
, type
, 0, 0);
1667 spin_unlock_bh(&pmc
->mca_lock
);
1674 * remove zero-count source records from a source filter list
1676 static void mld_clear_zeros(struct ip6_sf_list
**ppsf
)
1678 struct ip6_sf_list
*psf_prev
, *psf_next
, *psf
;
1681 for (psf
=*ppsf
; psf
; psf
= psf_next
) {
1682 psf_next
= psf
->sf_next
;
1683 if (psf
->sf_crcount
== 0) {
1685 psf_prev
->sf_next
= psf
->sf_next
;
1687 *ppsf
= psf
->sf_next
;
1694 static void mld_send_cr(struct inet6_dev
*idev
)
1696 struct ifmcaddr6
*pmc
, *pmc_prev
, *pmc_next
;
1697 struct sk_buff
*skb
= NULL
;
1700 read_lock_bh(&idev
->lock
);
1701 spin_lock(&idev
->mc_lock
);
1705 for (pmc
=idev
->mc_tomb
; pmc
; pmc
=pmc_next
) {
1706 pmc_next
= pmc
->next
;
1707 if (pmc
->mca_sfmode
== MCAST_INCLUDE
) {
1708 type
= MLD2_BLOCK_OLD_SOURCES
;
1709 dtype
= MLD2_BLOCK_OLD_SOURCES
;
1710 skb
= add_grec(skb
, pmc
, type
, 1, 0);
1711 skb
= add_grec(skb
, pmc
, dtype
, 1, 1);
1713 if (pmc
->mca_crcount
) {
1714 if (pmc
->mca_sfmode
== MCAST_EXCLUDE
) {
1715 type
= MLD2_CHANGE_TO_INCLUDE
;
1716 skb
= add_grec(skb
, pmc
, type
, 1, 0);
1719 if (pmc
->mca_crcount
== 0) {
1720 mld_clear_zeros(&pmc
->mca_tomb
);
1721 mld_clear_zeros(&pmc
->mca_sources
);
1724 if (pmc
->mca_crcount
== 0 && !pmc
->mca_tomb
&&
1725 !pmc
->mca_sources
) {
1727 pmc_prev
->next
= pmc_next
;
1729 idev
->mc_tomb
= pmc_next
;
1730 in6_dev_put(pmc
->idev
);
1735 spin_unlock(&idev
->mc_lock
);
1738 for (pmc
=idev
->mc_list
; pmc
; pmc
=pmc
->next
) {
1739 spin_lock_bh(&pmc
->mca_lock
);
1740 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
]) {
1741 type
= MLD2_BLOCK_OLD_SOURCES
;
1742 dtype
= MLD2_ALLOW_NEW_SOURCES
;
1744 type
= MLD2_ALLOW_NEW_SOURCES
;
1745 dtype
= MLD2_BLOCK_OLD_SOURCES
;
1747 skb
= add_grec(skb
, pmc
, type
, 0, 0);
1748 skb
= add_grec(skb
, pmc
, dtype
, 0, 1); /* deleted sources */
1750 /* filter mode changes */
1751 if (pmc
->mca_crcount
) {
1752 if (pmc
->mca_sfmode
== MCAST_EXCLUDE
)
1753 type
= MLD2_CHANGE_TO_EXCLUDE
;
1755 type
= MLD2_CHANGE_TO_INCLUDE
;
1756 skb
= add_grec(skb
, pmc
, type
, 0, 0);
1759 spin_unlock_bh(&pmc
->mca_lock
);
1761 read_unlock_bh(&idev
->lock
);
1764 (void) mld_sendpack(skb
);
1767 static void igmp6_send(struct in6_addr
*addr
, struct net_device
*dev
, int type
)
1769 struct net
*net
= dev_net(dev
);
1770 struct sock
*sk
= net
->ipv6
.igmp_sk
;
1771 struct inet6_dev
*idev
;
1772 struct sk_buff
*skb
;
1773 struct icmp6hdr
*hdr
;
1774 const struct in6_addr
*snd_addr
, *saddr
;
1775 struct in6_addr
*addrp
;
1776 struct in6_addr addr_buf
;
1777 int err
, len
, payload_len
, full_len
;
1778 u8 ra
[8] = { IPPROTO_ICMPV6
, 0,
1779 IPV6_TLV_ROUTERALERT
, 2, 0, 0,
1782 struct dst_entry
*dst
;
1784 if (type
== ICMPV6_MGM_REDUCTION
)
1785 snd_addr
= &in6addr_linklocal_allrouters
;
1789 len
= sizeof(struct icmp6hdr
) + sizeof(struct in6_addr
);
1790 payload_len
= len
+ sizeof(ra
);
1791 full_len
= sizeof(struct ipv6hdr
) + payload_len
;
1794 IP6_UPD_PO_STATS(net
, __in6_dev_get(dev
),
1795 IPSTATS_MIB_OUT
, full_len
);
1798 skb
= sock_alloc_send_skb(sk
, LL_ALLOCATED_SPACE(dev
) + full_len
, 1, &err
);
1802 IP6_INC_STATS(net
, __in6_dev_get(dev
),
1803 IPSTATS_MIB_OUTDISCARDS
);
1808 skb_reserve(skb
, LL_RESERVED_SPACE(dev
));
1810 if (ipv6_get_lladdr(dev
, &addr_buf
, IFA_F_TENTATIVE
)) {
1811 /* <draft-ietf-magma-mld-source-05.txt>:
1812 * use unspecified address as the source address
1813 * when a valid link-local address is not available.
1815 saddr
= &in6addr_any
;
1819 ip6_nd_hdr(sk
, skb
, dev
, saddr
, snd_addr
, NEXTHDR_HOP
, payload_len
);
1821 memcpy(skb_put(skb
, sizeof(ra
)), ra
, sizeof(ra
));
1823 hdr
= (struct icmp6hdr
*) skb_put(skb
, sizeof(struct icmp6hdr
));
1824 memset(hdr
, 0, sizeof(struct icmp6hdr
));
1825 hdr
->icmp6_type
= type
;
1827 addrp
= (struct in6_addr
*) skb_put(skb
, sizeof(struct in6_addr
));
1828 ipv6_addr_copy(addrp
, addr
);
1830 hdr
->icmp6_cksum
= csum_ipv6_magic(saddr
, snd_addr
, len
,
1832 csum_partial(hdr
, len
, 0));
1834 idev
= in6_dev_get(skb
->dev
);
1836 dst
= icmp6_dst_alloc(skb
->dev
, NULL
, &ipv6_hdr(skb
)->daddr
);
1842 icmpv6_flow_init(sk
, &fl
, type
,
1843 &ipv6_hdr(skb
)->saddr
, &ipv6_hdr(skb
)->daddr
,
1846 err
= xfrm_lookup(net
, &dst
, &fl
, NULL
, 0);
1850 skb_dst_set(skb
, dst
);
1851 err
= NF_HOOK(PF_INET6
, NF_INET_LOCAL_OUT
, skb
, NULL
, skb
->dev
,
1855 ICMP6MSGOUT_INC_STATS(net
, idev
, type
);
1856 ICMP6_INC_STATS(net
, idev
, ICMP6_MIB_OUTMSGS
);
1857 IP6_UPD_PO_STATS(net
, idev
, IPSTATS_MIB_OUTMCAST
, full_len
);
1859 IP6_INC_STATS(net
, idev
, IPSTATS_MIB_OUTDISCARDS
);
1861 if (likely(idev
!= NULL
))
1870 static int ip6_mc_del1_src(struct ifmcaddr6
*pmc
, int sfmode
,
1871 struct in6_addr
*psfsrc
)
1873 struct ip6_sf_list
*psf
, *psf_prev
;
1877 for (psf
=pmc
->mca_sources
; psf
; psf
=psf
->sf_next
) {
1878 if (ipv6_addr_equal(&psf
->sf_addr
, psfsrc
))
1882 if (!psf
|| psf
->sf_count
[sfmode
] == 0) {
1883 /* source filter not found, or count wrong => bug */
1886 psf
->sf_count
[sfmode
]--;
1887 if (!psf
->sf_count
[MCAST_INCLUDE
] && !psf
->sf_count
[MCAST_EXCLUDE
]) {
1888 struct inet6_dev
*idev
= pmc
->idev
;
1890 /* no more filters for this source */
1892 psf_prev
->sf_next
= psf
->sf_next
;
1894 pmc
->mca_sources
= psf
->sf_next
;
1895 if (psf
->sf_oldin
&& !(pmc
->mca_flags
& MAF_NOREPORT
) &&
1896 !MLD_V1_SEEN(idev
)) {
1897 psf
->sf_crcount
= idev
->mc_qrv
;
1898 psf
->sf_next
= pmc
->mca_tomb
;
1899 pmc
->mca_tomb
= psf
;
1907 static int ip6_mc_del_src(struct inet6_dev
*idev
, struct in6_addr
*pmca
,
1908 int sfmode
, int sfcount
, struct in6_addr
*psfsrc
,
1911 struct ifmcaddr6
*pmc
;
1917 read_lock_bh(&idev
->lock
);
1918 for (pmc
=idev
->mc_list
; pmc
; pmc
=pmc
->next
) {
1919 if (ipv6_addr_equal(pmca
, &pmc
->mca_addr
))
1923 /* MCA not found?? bug */
1924 read_unlock_bh(&idev
->lock
);
1927 spin_lock_bh(&pmc
->mca_lock
);
1930 if (!pmc
->mca_sfcount
[sfmode
]) {
1931 spin_unlock_bh(&pmc
->mca_lock
);
1932 read_unlock_bh(&idev
->lock
);
1935 pmc
->mca_sfcount
[sfmode
]--;
1938 for (i
=0; i
<sfcount
; i
++) {
1939 int rv
= ip6_mc_del1_src(pmc
, sfmode
, &psfsrc
[i
]);
1941 changerec
|= rv
> 0;
1945 if (pmc
->mca_sfmode
== MCAST_EXCLUDE
&&
1946 pmc
->mca_sfcount
[MCAST_EXCLUDE
] == 0 &&
1947 pmc
->mca_sfcount
[MCAST_INCLUDE
]) {
1948 struct ip6_sf_list
*psf
;
1950 /* filter mode change */
1951 pmc
->mca_sfmode
= MCAST_INCLUDE
;
1952 pmc
->mca_crcount
= idev
->mc_qrv
;
1953 idev
->mc_ifc_count
= pmc
->mca_crcount
;
1954 for (psf
=pmc
->mca_sources
; psf
; psf
= psf
->sf_next
)
1955 psf
->sf_crcount
= 0;
1956 mld_ifc_event(pmc
->idev
);
1957 } else if (sf_setstate(pmc
) || changerec
)
1958 mld_ifc_event(pmc
->idev
);
1959 spin_unlock_bh(&pmc
->mca_lock
);
1960 read_unlock_bh(&idev
->lock
);
1965 * Add multicast single-source filter to the interface list
1967 static int ip6_mc_add1_src(struct ifmcaddr6
*pmc
, int sfmode
,
1968 struct in6_addr
*psfsrc
, int delta
)
1970 struct ip6_sf_list
*psf
, *psf_prev
;
1973 for (psf
=pmc
->mca_sources
; psf
; psf
=psf
->sf_next
) {
1974 if (ipv6_addr_equal(&psf
->sf_addr
, psfsrc
))
1979 psf
= kzalloc(sizeof(*psf
), GFP_ATOMIC
);
1983 psf
->sf_addr
= *psfsrc
;
1985 psf_prev
->sf_next
= psf
;
1987 pmc
->mca_sources
= psf
;
1989 psf
->sf_count
[sfmode
]++;
1993 static void sf_markstate(struct ifmcaddr6
*pmc
)
1995 struct ip6_sf_list
*psf
;
1996 int mca_xcount
= pmc
->mca_sfcount
[MCAST_EXCLUDE
];
1998 for (psf
=pmc
->mca_sources
; psf
; psf
=psf
->sf_next
)
1999 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
]) {
2000 psf
->sf_oldin
= mca_xcount
==
2001 psf
->sf_count
[MCAST_EXCLUDE
] &&
2002 !psf
->sf_count
[MCAST_INCLUDE
];
2004 psf
->sf_oldin
= psf
->sf_count
[MCAST_INCLUDE
] != 0;
2007 static int sf_setstate(struct ifmcaddr6
*pmc
)
2009 struct ip6_sf_list
*psf
, *dpsf
;
2010 int mca_xcount
= pmc
->mca_sfcount
[MCAST_EXCLUDE
];
2011 int qrv
= pmc
->idev
->mc_qrv
;
2015 for (psf
=pmc
->mca_sources
; psf
; psf
=psf
->sf_next
) {
2016 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
]) {
2017 new_in
= mca_xcount
== psf
->sf_count
[MCAST_EXCLUDE
] &&
2018 !psf
->sf_count
[MCAST_INCLUDE
];
2020 new_in
= psf
->sf_count
[MCAST_INCLUDE
] != 0;
2022 if (!psf
->sf_oldin
) {
2023 struct ip6_sf_list
*prev
= NULL
;
2025 for (dpsf
=pmc
->mca_tomb
; dpsf
;
2026 dpsf
=dpsf
->sf_next
) {
2027 if (ipv6_addr_equal(&dpsf
->sf_addr
,
2034 prev
->sf_next
= dpsf
->sf_next
;
2036 pmc
->mca_tomb
= dpsf
->sf_next
;
2039 psf
->sf_crcount
= qrv
;
2042 } else if (psf
->sf_oldin
) {
2043 psf
->sf_crcount
= 0;
2045 * add or update "delete" records if an active filter
2048 for (dpsf
=pmc
->mca_tomb
; dpsf
; dpsf
=dpsf
->sf_next
)
2049 if (ipv6_addr_equal(&dpsf
->sf_addr
,
2053 dpsf
= (struct ip6_sf_list
*)
2054 kmalloc(sizeof(*dpsf
), GFP_ATOMIC
);
2058 /* pmc->mca_lock held by callers */
2059 dpsf
->sf_next
= pmc
->mca_tomb
;
2060 pmc
->mca_tomb
= dpsf
;
2062 dpsf
->sf_crcount
= qrv
;
2070 * Add multicast source filter list to the interface list
2072 static int ip6_mc_add_src(struct inet6_dev
*idev
, struct in6_addr
*pmca
,
2073 int sfmode
, int sfcount
, struct in6_addr
*psfsrc
,
2076 struct ifmcaddr6
*pmc
;
2082 read_lock_bh(&idev
->lock
);
2083 for (pmc
=idev
->mc_list
; pmc
; pmc
=pmc
->next
) {
2084 if (ipv6_addr_equal(pmca
, &pmc
->mca_addr
))
2088 /* MCA not found?? bug */
2089 read_unlock_bh(&idev
->lock
);
2092 spin_lock_bh(&pmc
->mca_lock
);
2095 isexclude
= pmc
->mca_sfmode
== MCAST_EXCLUDE
;
2097 pmc
->mca_sfcount
[sfmode
]++;
2099 for (i
=0; i
<sfcount
; i
++) {
2100 err
= ip6_mc_add1_src(pmc
, sfmode
, &psfsrc
[i
], delta
);
2108 pmc
->mca_sfcount
[sfmode
]--;
2110 (void) ip6_mc_del1_src(pmc
, sfmode
, &psfsrc
[i
]);
2111 } else if (isexclude
!= (pmc
->mca_sfcount
[MCAST_EXCLUDE
] != 0)) {
2112 struct ip6_sf_list
*psf
;
2114 /* filter mode change */
2115 if (pmc
->mca_sfcount
[MCAST_EXCLUDE
])
2116 pmc
->mca_sfmode
= MCAST_EXCLUDE
;
2117 else if (pmc
->mca_sfcount
[MCAST_INCLUDE
])
2118 pmc
->mca_sfmode
= MCAST_INCLUDE
;
2119 /* else no filters; keep old mode for reports */
2121 pmc
->mca_crcount
= idev
->mc_qrv
;
2122 idev
->mc_ifc_count
= pmc
->mca_crcount
;
2123 for (psf
=pmc
->mca_sources
; psf
; psf
= psf
->sf_next
)
2124 psf
->sf_crcount
= 0;
2125 mld_ifc_event(idev
);
2126 } else if (sf_setstate(pmc
))
2127 mld_ifc_event(idev
);
2128 spin_unlock_bh(&pmc
->mca_lock
);
2129 read_unlock_bh(&idev
->lock
);
2133 static void ip6_mc_clear_src(struct ifmcaddr6
*pmc
)
2135 struct ip6_sf_list
*psf
, *nextpsf
;
2137 for (psf
=pmc
->mca_tomb
; psf
; psf
=nextpsf
) {
2138 nextpsf
= psf
->sf_next
;
2141 pmc
->mca_tomb
= NULL
;
2142 for (psf
=pmc
->mca_sources
; psf
; psf
=nextpsf
) {
2143 nextpsf
= psf
->sf_next
;
2146 pmc
->mca_sources
= NULL
;
2147 pmc
->mca_sfmode
= MCAST_EXCLUDE
;
2148 pmc
->mca_sfcount
[MCAST_INCLUDE
] = 0;
2149 pmc
->mca_sfcount
[MCAST_EXCLUDE
] = 1;
2153 static void igmp6_join_group(struct ifmcaddr6
*ma
)
2155 unsigned long delay
;
2157 if (ma
->mca_flags
& MAF_NOREPORT
)
2160 igmp6_send(&ma
->mca_addr
, ma
->idev
->dev
, ICMPV6_MGM_REPORT
);
2162 delay
= net_random() % IGMP6_UNSOLICITED_IVAL
;
2164 spin_lock_bh(&ma
->mca_lock
);
2165 if (del_timer(&ma
->mca_timer
)) {
2166 atomic_dec(&ma
->mca_refcnt
);
2167 delay
= ma
->mca_timer
.expires
- jiffies
;
2170 if (!mod_timer(&ma
->mca_timer
, jiffies
+ delay
))
2171 atomic_inc(&ma
->mca_refcnt
);
2172 ma
->mca_flags
|= MAF_TIMER_RUNNING
| MAF_LAST_REPORTER
;
2173 spin_unlock_bh(&ma
->mca_lock
);
2176 static int ip6_mc_leave_src(struct sock
*sk
, struct ipv6_mc_socklist
*iml
,
2177 struct inet6_dev
*idev
)
2181 /* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
2182 * so no other readers or writers of iml or its sflist
2185 /* any-source empty exclude case */
2186 return ip6_mc_del_src(idev
, &iml
->addr
, iml
->sfmode
, 0, NULL
, 0);
2188 err
= ip6_mc_del_src(idev
, &iml
->addr
, iml
->sfmode
,
2189 iml
->sflist
->sl_count
, iml
->sflist
->sl_addr
, 0);
2190 sock_kfree_s(sk
, iml
->sflist
, IP6_SFLSIZE(iml
->sflist
->sl_max
));
2195 static void igmp6_leave_group(struct ifmcaddr6
*ma
)
2197 if (MLD_V1_SEEN(ma
->idev
)) {
2198 if (ma
->mca_flags
& MAF_LAST_REPORTER
)
2199 igmp6_send(&ma
->mca_addr
, ma
->idev
->dev
,
2200 ICMPV6_MGM_REDUCTION
);
2202 mld_add_delrec(ma
->idev
, ma
);
2203 mld_ifc_event(ma
->idev
);
2207 static void mld_gq_timer_expire(unsigned long data
)
2209 struct inet6_dev
*idev
= (struct inet6_dev
*)data
;
2211 idev
->mc_gq_running
= 0;
2212 mld_send_report(idev
, NULL
);
2213 __in6_dev_put(idev
);
2216 static void mld_ifc_timer_expire(unsigned long data
)
2218 struct inet6_dev
*idev
= (struct inet6_dev
*)data
;
2221 if (idev
->mc_ifc_count
) {
2222 idev
->mc_ifc_count
--;
2223 if (idev
->mc_ifc_count
)
2224 mld_ifc_start_timer(idev
, idev
->mc_maxdelay
);
2226 __in6_dev_put(idev
);
2229 static void mld_ifc_event(struct inet6_dev
*idev
)
2231 if (MLD_V1_SEEN(idev
))
2233 idev
->mc_ifc_count
= idev
->mc_qrv
;
2234 mld_ifc_start_timer(idev
, 1);
2238 static void igmp6_timer_handler(unsigned long data
)
2240 struct ifmcaddr6
*ma
= (struct ifmcaddr6
*) data
;
2242 if (MLD_V1_SEEN(ma
->idev
))
2243 igmp6_send(&ma
->mca_addr
, ma
->idev
->dev
, ICMPV6_MGM_REPORT
);
2245 mld_send_report(ma
->idev
, ma
);
2247 spin_lock(&ma
->mca_lock
);
2248 ma
->mca_flags
|= MAF_LAST_REPORTER
;
2249 ma
->mca_flags
&= ~MAF_TIMER_RUNNING
;
2250 spin_unlock(&ma
->mca_lock
);
2254 /* Device changing type */
2256 void ipv6_mc_unmap(struct inet6_dev
*idev
)
2258 struct ifmcaddr6
*i
;
2260 /* Install multicast list, except for all-nodes (already installed) */
2262 read_lock_bh(&idev
->lock
);
2263 for (i
= idev
->mc_list
; i
; i
= i
->next
)
2264 igmp6_group_dropped(i
);
2265 read_unlock_bh(&idev
->lock
);
2268 void ipv6_mc_remap(struct inet6_dev
*idev
)
2273 /* Device going down */
2275 void ipv6_mc_down(struct inet6_dev
*idev
)
2277 struct ifmcaddr6
*i
;
2279 /* Withdraw multicast list */
2281 read_lock_bh(&idev
->lock
);
2282 idev
->mc_ifc_count
= 0;
2283 if (del_timer(&idev
->mc_ifc_timer
))
2284 __in6_dev_put(idev
);
2285 idev
->mc_gq_running
= 0;
2286 if (del_timer(&idev
->mc_gq_timer
))
2287 __in6_dev_put(idev
);
2289 for (i
= idev
->mc_list
; i
; i
=i
->next
)
2290 igmp6_group_dropped(i
);
2291 read_unlock_bh(&idev
->lock
);
2293 mld_clear_delrec(idev
);
2297 /* Device going up */
2299 void ipv6_mc_up(struct inet6_dev
*idev
)
2301 struct ifmcaddr6
*i
;
2303 /* Install multicast list, except for all-nodes (already installed) */
2305 read_lock_bh(&idev
->lock
);
2306 for (i
= idev
->mc_list
; i
; i
=i
->next
)
2307 igmp6_group_added(i
);
2308 read_unlock_bh(&idev
->lock
);
2311 /* IPv6 device initialization. */
2313 void ipv6_mc_init_dev(struct inet6_dev
*idev
)
2315 write_lock_bh(&idev
->lock
);
2316 spin_lock_init(&idev
->mc_lock
);
2317 idev
->mc_gq_running
= 0;
2318 setup_timer(&idev
->mc_gq_timer
, mld_gq_timer_expire
,
2319 (unsigned long)idev
);
2320 idev
->mc_tomb
= NULL
;
2321 idev
->mc_ifc_count
= 0;
2322 setup_timer(&idev
->mc_ifc_timer
, mld_ifc_timer_expire
,
2323 (unsigned long)idev
);
2324 idev
->mc_qrv
= MLD_QRV_DEFAULT
;
2325 idev
->mc_maxdelay
= IGMP6_UNSOLICITED_IVAL
;
2326 idev
->mc_v1_seen
= 0;
2327 write_unlock_bh(&idev
->lock
);
2331 * Device is about to be destroyed: clean up.
2334 void ipv6_mc_destroy_dev(struct inet6_dev
*idev
)
2336 struct ifmcaddr6
*i
;
2338 /* Deactivate timers */
2341 /* Delete all-nodes address. */
2342 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2343 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2346 __ipv6_dev_mc_dec(idev
, &in6addr_linklocal_allnodes
);
2348 if (idev
->cnf
.forwarding
)
2349 __ipv6_dev_mc_dec(idev
, &in6addr_linklocal_allrouters
);
2351 write_lock_bh(&idev
->lock
);
2352 while ((i
= idev
->mc_list
) != NULL
) {
2353 idev
->mc_list
= i
->next
;
2354 write_unlock_bh(&idev
->lock
);
2356 igmp6_group_dropped(i
);
2359 write_lock_bh(&idev
->lock
);
2361 write_unlock_bh(&idev
->lock
);
2364 #ifdef CONFIG_PROC_FS
2365 struct igmp6_mc_iter_state
{
2366 struct seq_net_private p
;
2367 struct net_device
*dev
;
2368 struct inet6_dev
*idev
;
2371 #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2373 static inline struct ifmcaddr6
*igmp6_mc_get_first(struct seq_file
*seq
)
2375 struct ifmcaddr6
*im
= NULL
;
2376 struct igmp6_mc_iter_state
*state
= igmp6_mc_seq_private(seq
);
2377 struct net
*net
= seq_file_net(seq
);
2380 for_each_netdev_rcu(net
, state
->dev
) {
2381 struct inet6_dev
*idev
;
2382 idev
= __in6_dev_get(state
->dev
);
2385 read_lock_bh(&idev
->lock
);
2391 read_unlock_bh(&idev
->lock
);
2396 static struct ifmcaddr6
*igmp6_mc_get_next(struct seq_file
*seq
, struct ifmcaddr6
*im
)
2398 struct igmp6_mc_iter_state
*state
= igmp6_mc_seq_private(seq
);
2402 if (likely(state
->idev
!= NULL
))
2403 read_unlock_bh(&state
->idev
->lock
);
2405 state
->dev
= next_net_device_rcu(state
->dev
);
2410 state
->idev
= __in6_dev_get(state
->dev
);
2413 read_lock_bh(&state
->idev
->lock
);
2414 im
= state
->idev
->mc_list
;
2419 static struct ifmcaddr6
*igmp6_mc_get_idx(struct seq_file
*seq
, loff_t pos
)
2421 struct ifmcaddr6
*im
= igmp6_mc_get_first(seq
);
2423 while (pos
&& (im
= igmp6_mc_get_next(seq
, im
)) != NULL
)
2425 return pos
? NULL
: im
;
2428 static void *igmp6_mc_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2432 return igmp6_mc_get_idx(seq
, *pos
);
2435 static void *igmp6_mc_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2437 struct ifmcaddr6
*im
= igmp6_mc_get_next(seq
, v
);
2443 static void igmp6_mc_seq_stop(struct seq_file
*seq
, void *v
)
2446 struct igmp6_mc_iter_state
*state
= igmp6_mc_seq_private(seq
);
2448 if (likely(state
->idev
!= NULL
)) {
2449 read_unlock_bh(&state
->idev
->lock
);
2456 static int igmp6_mc_seq_show(struct seq_file
*seq
, void *v
)
2458 struct ifmcaddr6
*im
= (struct ifmcaddr6
*)v
;
2459 struct igmp6_mc_iter_state
*state
= igmp6_mc_seq_private(seq
);
2462 "%-4d %-15s %pi6 %5d %08X %ld\n",
2463 state
->dev
->ifindex
, state
->dev
->name
,
2465 im
->mca_users
, im
->mca_flags
,
2466 (im
->mca_flags
&MAF_TIMER_RUNNING
) ?
2467 jiffies_to_clock_t(im
->mca_timer
.expires
-jiffies
) : 0);
2471 static const struct seq_operations igmp6_mc_seq_ops
= {
2472 .start
= igmp6_mc_seq_start
,
2473 .next
= igmp6_mc_seq_next
,
2474 .stop
= igmp6_mc_seq_stop
,
2475 .show
= igmp6_mc_seq_show
,
2478 static int igmp6_mc_seq_open(struct inode
*inode
, struct file
*file
)
2480 return seq_open_net(inode
, file
, &igmp6_mc_seq_ops
,
2481 sizeof(struct igmp6_mc_iter_state
));
2484 static const struct file_operations igmp6_mc_seq_fops
= {
2485 .owner
= THIS_MODULE
,
2486 .open
= igmp6_mc_seq_open
,
2488 .llseek
= seq_lseek
,
2489 .release
= seq_release_net
,
2492 struct igmp6_mcf_iter_state
{
2493 struct seq_net_private p
;
2494 struct net_device
*dev
;
2495 struct inet6_dev
*idev
;
2496 struct ifmcaddr6
*im
;
2499 #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2501 static inline struct ip6_sf_list
*igmp6_mcf_get_first(struct seq_file
*seq
)
2503 struct ip6_sf_list
*psf
= NULL
;
2504 struct ifmcaddr6
*im
= NULL
;
2505 struct igmp6_mcf_iter_state
*state
= igmp6_mcf_seq_private(seq
);
2506 struct net
*net
= seq_file_net(seq
);
2510 for_each_netdev_rcu(net
, state
->dev
) {
2511 struct inet6_dev
*idev
;
2512 idev
= __in6_dev_get(state
->dev
);
2513 if (unlikely(idev
== NULL
))
2515 read_lock_bh(&idev
->lock
);
2517 if (likely(im
!= NULL
)) {
2518 spin_lock_bh(&im
->mca_lock
);
2519 psf
= im
->mca_sources
;
2520 if (likely(psf
!= NULL
)) {
2525 spin_unlock_bh(&im
->mca_lock
);
2527 read_unlock_bh(&idev
->lock
);
2532 static struct ip6_sf_list
*igmp6_mcf_get_next(struct seq_file
*seq
, struct ip6_sf_list
*psf
)
2534 struct igmp6_mcf_iter_state
*state
= igmp6_mcf_seq_private(seq
);
2538 spin_unlock_bh(&state
->im
->mca_lock
);
2539 state
->im
= state
->im
->next
;
2540 while (!state
->im
) {
2541 if (likely(state
->idev
!= NULL
))
2542 read_unlock_bh(&state
->idev
->lock
);
2544 state
->dev
= next_net_device_rcu(state
->dev
);
2549 state
->idev
= __in6_dev_get(state
->dev
);
2552 read_lock_bh(&state
->idev
->lock
);
2553 state
->im
= state
->idev
->mc_list
;
2557 spin_lock_bh(&state
->im
->mca_lock
);
2558 psf
= state
->im
->mca_sources
;
2564 static struct ip6_sf_list
*igmp6_mcf_get_idx(struct seq_file
*seq
, loff_t pos
)
2566 struct ip6_sf_list
*psf
= igmp6_mcf_get_first(seq
);
2568 while (pos
&& (psf
= igmp6_mcf_get_next(seq
, psf
)) != NULL
)
2570 return pos
? NULL
: psf
;
2573 static void *igmp6_mcf_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2577 return *pos
? igmp6_mcf_get_idx(seq
, *pos
- 1) : SEQ_START_TOKEN
;
2580 static void *igmp6_mcf_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2582 struct ip6_sf_list
*psf
;
2583 if (v
== SEQ_START_TOKEN
)
2584 psf
= igmp6_mcf_get_first(seq
);
2586 psf
= igmp6_mcf_get_next(seq
, v
);
2591 static void igmp6_mcf_seq_stop(struct seq_file
*seq
, void *v
)
2594 struct igmp6_mcf_iter_state
*state
= igmp6_mcf_seq_private(seq
);
2595 if (likely(state
->im
!= NULL
)) {
2596 spin_unlock_bh(&state
->im
->mca_lock
);
2599 if (likely(state
->idev
!= NULL
)) {
2600 read_unlock_bh(&state
->idev
->lock
);
2607 static int igmp6_mcf_seq_show(struct seq_file
*seq
, void *v
)
2609 struct ip6_sf_list
*psf
= (struct ip6_sf_list
*)v
;
2610 struct igmp6_mcf_iter_state
*state
= igmp6_mcf_seq_private(seq
);
2612 if (v
== SEQ_START_TOKEN
) {
2615 "%32s %32s %6s %6s\n", "Idx",
2616 "Device", "Multicast Address",
2617 "Source Address", "INC", "EXC");
2620 "%3d %6.6s %pi6 %pi6 %6lu %6lu\n",
2621 state
->dev
->ifindex
, state
->dev
->name
,
2622 &state
->im
->mca_addr
,
2624 psf
->sf_count
[MCAST_INCLUDE
],
2625 psf
->sf_count
[MCAST_EXCLUDE
]);
2630 static const struct seq_operations igmp6_mcf_seq_ops
= {
2631 .start
= igmp6_mcf_seq_start
,
2632 .next
= igmp6_mcf_seq_next
,
2633 .stop
= igmp6_mcf_seq_stop
,
2634 .show
= igmp6_mcf_seq_show
,
2637 static int igmp6_mcf_seq_open(struct inode
*inode
, struct file
*file
)
2639 return seq_open_net(inode
, file
, &igmp6_mcf_seq_ops
,
2640 sizeof(struct igmp6_mcf_iter_state
));
2643 static const struct file_operations igmp6_mcf_seq_fops
= {
2644 .owner
= THIS_MODULE
,
2645 .open
= igmp6_mcf_seq_open
,
2647 .llseek
= seq_lseek
,
2648 .release
= seq_release_net
,
2651 static int __net_init
igmp6_proc_init(struct net
*net
)
2656 if (!proc_net_fops_create(net
, "igmp6", S_IRUGO
, &igmp6_mc_seq_fops
))
2658 if (!proc_net_fops_create(net
, "mcfilter6", S_IRUGO
,
2659 &igmp6_mcf_seq_fops
))
2660 goto out_proc_net_igmp6
;
2667 proc_net_remove(net
, "igmp6");
2671 static void __net_exit
igmp6_proc_exit(struct net
*net
)
2673 proc_net_remove(net
, "mcfilter6");
2674 proc_net_remove(net
, "igmp6");
2677 static inline int igmp6_proc_init(struct net
*net
)
2681 static inline void igmp6_proc_exit(struct net
*net
)
2686 static int __net_init
igmp6_net_init(struct net
*net
)
2690 err
= inet_ctl_sock_create(&net
->ipv6
.igmp_sk
, PF_INET6
,
2691 SOCK_RAW
, IPPROTO_ICMPV6
, net
);
2694 "Failed to initialize the IGMP6 control socket (err %d).\n",
2699 inet6_sk(net
->ipv6
.igmp_sk
)->hop_limit
= 1;
2701 err
= igmp6_proc_init(net
);
2703 goto out_sock_create
;
2708 inet_ctl_sock_destroy(net
->ipv6
.igmp_sk
);
2712 static void __net_exit
igmp6_net_exit(struct net
*net
)
2714 inet_ctl_sock_destroy(net
->ipv6
.igmp_sk
);
2715 igmp6_proc_exit(net
);
2718 static struct pernet_operations igmp6_net_ops
= {
2719 .init
= igmp6_net_init
,
2720 .exit
= igmp6_net_exit
,
2723 int __init
igmp6_init(void)
2725 return register_pernet_subsys(&igmp6_net_ops
);
2728 void igmp6_cleanup(void)
2730 unregister_pernet_subsys(&igmp6_net_ops
);