blob: ee7839f4d6e3450c222f2b2677d3b9cf0709d21e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Multicast support for IPv6
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003 * Linux INET6 implementation
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
5 * Authors:
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09006 * Pedro Roque <roque@di.fc.ul.pt>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09008 * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 *
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.
14 */
15
16/* Changes:
17 *
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>:
26 * - MLDv2 support
27 */
28
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#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>
38#include <linux/in.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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090046#include <linux/slab.h>
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +090047#include <net/mld.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
49#include <linux/netfilter.h>
50#include <linux/netfilter_ipv6.h>
51
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020052#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#include <net/sock.h>
54#include <net/snmp.h>
55
56#include <net/ipv6.h>
57#include <net/protocol.h>
58#include <net/if_inet6.h>
59#include <net/ndisc.h>
60#include <net/addrconf.h>
61#include <net/ip6_route.h>
Denis V. Lunev1ed85162008-04-03 14:31:03 -070062#include <net/inet_common.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64#include <net/ip6_checksum.h>
65
66/* Set to 3 to get tracing... */
67#define MCAST_DEBUG 2
68
69#if MCAST_DEBUG >= 3
70#define MDBG(x) printk x
71#else
72#define MDBG(x)
73#endif
74
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +090075/* Ensure that we have struct in6_addr aligned on 32bit word. */
76static void *__mld2_query_bugs[] __attribute__((__unused__)) = {
77 BUILD_BUG_ON_NULL(offsetof(struct mld2_query, mld2q_srcs) % 4),
78 BUILD_BUG_ON_NULL(offsetof(struct mld2_report, mld2r_grec) % 4),
79 BUILD_BUG_ON_NULL(offsetof(struct mld2_grec, grec_mca) % 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -070080};
81
82static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
83
84/* Big mc list lock for all the sockets */
Eric Dumazet456b61b2010-11-23 13:12:15 +000085static DEFINE_SPINLOCK(ipv6_sk_mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
Linus Torvalds1da177e2005-04-16 15:20:36 -070087static void igmp6_join_group(struct ifmcaddr6 *ma);
88static void igmp6_leave_group(struct ifmcaddr6 *ma);
89static void igmp6_timer_handler(unsigned long data);
90
91static void mld_gq_timer_expire(unsigned long data);
92static void mld_ifc_timer_expire(unsigned long data);
93static void mld_ifc_event(struct inet6_dev *idev);
94static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
Eric Dumazetb71d1d42011-04-22 04:53:02 +000095static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096static void mld_clear_delrec(struct inet6_dev *idev);
97static int sf_setstate(struct ifmcaddr6 *pmc);
98static void sf_markstate(struct ifmcaddr6 *pmc);
99static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000100static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
101 int sfmode, int sfcount, const struct in6_addr *psfsrc,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 int delta);
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000103static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
104 int sfmode, int sfcount, const struct in6_addr *psfsrc,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 int delta);
106static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
107 struct inet6_dev *idev);
108
109
110#define IGMP6_UNSOLICITED_IVAL (10*HZ)
111#define MLD_QRV_DEFAULT 2
112
YOSHIFUJI Hideaki53b79972008-07-19 22:35:03 -0700113#define MLD_V1_SEEN(idev) (dev_net((idev)->dev)->ipv6.devconf_all->force_mld_version == 1 || \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 (idev)->cnf.force_mld_version == 1 || \
115 ((idev)->mc_v1_seen && \
116 time_before(jiffies, (idev)->mc_v1_seen)))
117
David L Stevens6f4353d2005-12-26 17:03:46 -0800118#define IPV6_MLD_MAX_MSF 64
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
Brian Haleyab32ea52006-09-22 14:15:41 -0700120int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
122/*
123 * socket join on multicast group
124 */
125
Eric Dumazet456b61b2010-11-23 13:12:15 +0000126#define for_each_pmc_rcu(np, pmc) \
127 for (pmc = rcu_dereference(np->ipv6_mc_list); \
128 pmc != NULL; \
129 pmc = rcu_dereference(pmc->next))
130
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900131int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132{
133 struct net_device *dev = NULL;
134 struct ipv6_mc_socklist *mc_lst;
135 struct ipv6_pinfo *np = inet6_sk(sk);
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900136 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 int err;
138
139 if (!ipv6_addr_is_multicast(addr))
140 return -EINVAL;
141
Eric Dumazet456b61b2010-11-23 13:12:15 +0000142 rcu_read_lock();
143 for_each_pmc_rcu(np, mc_lst) {
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700144 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
145 ipv6_addr_equal(&mc_lst->addr, addr)) {
Eric Dumazet456b61b2010-11-23 13:12:15 +0000146 rcu_read_unlock();
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700147 return -EADDRINUSE;
148 }
149 }
Eric Dumazet456b61b2010-11-23 13:12:15 +0000150 rcu_read_unlock();
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700151
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
153
154 if (mc_lst == NULL)
155 return -ENOMEM;
156
157 mc_lst->next = NULL;
158 ipv6_addr_copy(&mc_lst->addr, addr);
159
Eric Dumazet96b52e62010-06-07 21:05:02 +0000160 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 if (ifindex == 0) {
162 struct rt6_info *rt;
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -0800163 rt = rt6_lookup(net, addr, NULL, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 if (rt) {
165 dev = rt->rt6i_dev;
Changli Gaod8d1f302010-06-10 23:31:35 -0700166 dst_release(&rt->dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 }
168 } else
Eric Dumazet96b52e62010-06-07 21:05:02 +0000169 dev = dev_get_by_index_rcu(net, ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
171 if (dev == NULL) {
Eric Dumazet96b52e62010-06-07 21:05:02 +0000172 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
174 return -ENODEV;
175 }
176
177 mc_lst->ifindex = dev->ifindex;
178 mc_lst->sfmode = MCAST_EXCLUDE;
YOSHIFUJI Hideaki196433c2006-01-04 13:56:31 -0800179 rwlock_init(&mc_lst->sflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 mc_lst->sflist = NULL;
181
182 /*
183 * now add/increase the group membership on the device
184 */
185
186 err = ipv6_dev_mc_inc(dev, addr);
187
188 if (err) {
Eric Dumazet96b52e62010-06-07 21:05:02 +0000189 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 return err;
192 }
193
Eric Dumazet456b61b2010-11-23 13:12:15 +0000194 spin_lock(&ipv6_sk_mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 mc_lst->next = np->ipv6_mc_list;
Eric Dumazet456b61b2010-11-23 13:12:15 +0000196 rcu_assign_pointer(np->ipv6_mc_list, mc_lst);
197 spin_unlock(&ipv6_sk_mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
Eric Dumazet96b52e62010-06-07 21:05:02 +0000199 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
201 return 0;
202}
203
204/*
205 * socket leave on multicast group
206 */
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900207int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208{
209 struct ipv6_pinfo *np = inet6_sk(sk);
Eric Dumazet456b61b2010-11-23 13:12:15 +0000210 struct ipv6_mc_socklist *mc_lst;
211 struct ipv6_mc_socklist __rcu **lnk;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900212 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
Eric Dumazet456b61b2010-11-23 13:12:15 +0000214 spin_lock(&ipv6_sk_mc_lock);
215 for (lnk = &np->ipv6_mc_list;
216 (mc_lst = rcu_dereference_protected(*lnk,
217 lockdep_is_held(&ipv6_sk_mc_lock))) !=NULL ;
218 lnk = &mc_lst->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
220 ipv6_addr_equal(&mc_lst->addr, addr)) {
221 struct net_device *dev;
222
223 *lnk = mc_lst->next;
Eric Dumazet456b61b2010-11-23 13:12:15 +0000224 spin_unlock(&ipv6_sk_mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
Eric Dumazet96b52e62010-06-07 21:05:02 +0000226 rcu_read_lock();
227 dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -0800228 if (dev != NULL) {
Eric Dumazet96b52e62010-06-07 21:05:02 +0000229 struct inet6_dev *idev = __in6_dev_get(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
David L Stevensacd6e002006-08-17 16:27:39 -0700231 (void) ip6_mc_leave_src(sk, mc_lst, idev);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000232 if (idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
David L Stevensacd6e002006-08-17 16:27:39 -0700234 } else
235 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000236 rcu_read_unlock();
Eric Dumazet456b61b2010-11-23 13:12:15 +0000237 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
Lai Jiangshane3cbf282011-03-18 12:00:50 +0800238 kfree_rcu(mc_lst, rcu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 return 0;
240 }
241 }
Eric Dumazet456b61b2010-11-23 13:12:15 +0000242 spin_unlock(&ipv6_sk_mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243
David L Stevens9951f032005-07-08 17:47:28 -0700244 return -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245}
246
Eric Dumazet96b52e62010-06-07 21:05:02 +0000247/* called with rcu_read_lock() */
248static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net,
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000249 const struct in6_addr *group,
Eric Dumazet96b52e62010-06-07 21:05:02 +0000250 int ifindex)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251{
252 struct net_device *dev = NULL;
253 struct inet6_dev *idev = NULL;
254
255 if (ifindex == 0) {
Eric Dumazet96b52e62010-06-07 21:05:02 +0000256 struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 if (rt) {
259 dev = rt->rt6i_dev;
260 dev_hold(dev);
Changli Gaod8d1f302010-06-10 23:31:35 -0700261 dst_release(&rt->dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 }
263 } else
Eric Dumazet96b52e62010-06-07 21:05:02 +0000264 dev = dev_get_by_index_rcu(net, ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265
266 if (!dev)
Eric Dumazet96b52e62010-06-07 21:05:02 +0000267 return NULL;
268 idev = __in6_dev_get(dev);
Ilpo Järvinen448eb712008-12-14 23:15:21 -0800269 if (!idev)
Joe Perches8a22c992010-11-14 17:05:00 +0000270 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 read_lock_bh(&idev->lock);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000272 if (idev->dead) {
273 read_unlock_bh(&idev->lock);
274 return NULL;
275 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 return idev;
277}
278
279void ipv6_sock_mc_close(struct sock *sk)
280{
281 struct ipv6_pinfo *np = inet6_sk(sk);
282 struct ipv6_mc_socklist *mc_lst;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900283 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284
Eric Dumazet456b61b2010-11-23 13:12:15 +0000285 spin_lock(&ipv6_sk_mc_lock);
286 while ((mc_lst = rcu_dereference_protected(np->ipv6_mc_list,
287 lockdep_is_held(&ipv6_sk_mc_lock))) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 struct net_device *dev;
289
290 np->ipv6_mc_list = mc_lst->next;
Eric Dumazet456b61b2010-11-23 13:12:15 +0000291 spin_unlock(&ipv6_sk_mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
Eric Dumazet96b52e62010-06-07 21:05:02 +0000293 rcu_read_lock();
294 dev = dev_get_by_index_rcu(net, mc_lst->ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 if (dev) {
Eric Dumazet96b52e62010-06-07 21:05:02 +0000296 struct inet6_dev *idev = __in6_dev_get(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297
David L Stevensacd6e002006-08-17 16:27:39 -0700298 (void) ip6_mc_leave_src(sk, mc_lst, idev);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000299 if (idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
David L Stevensacd6e002006-08-17 16:27:39 -0700301 } else
302 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000303 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
Eric Dumazet456b61b2010-11-23 13:12:15 +0000305 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
Lai Jiangshane3cbf282011-03-18 12:00:50 +0800306 kfree_rcu(mc_lst, rcu);
Eric Dumazet456b61b2010-11-23 13:12:15 +0000307
308 spin_lock(&ipv6_sk_mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 }
Eric Dumazet456b61b2010-11-23 13:12:15 +0000310 spin_unlock(&ipv6_sk_mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311}
312
313int ip6_mc_source(int add, int omode, struct sock *sk,
314 struct group_source_req *pgsr)
315{
316 struct in6_addr *source, *group;
317 struct ipv6_mc_socklist *pmc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 struct inet6_dev *idev;
319 struct ipv6_pinfo *inet6 = inet6_sk(sk);
320 struct ip6_sf_socklist *psl;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900321 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 int i, j, rv;
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700323 int leavegroup = 0;
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800324 int pmclocked = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 int err;
326
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
328 group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
329
330 if (!ipv6_addr_is_multicast(group))
331 return -EINVAL;
332
Eric Dumazet96b52e62010-06-07 21:05:02 +0000333 rcu_read_lock();
334 idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface);
335 if (!idev) {
336 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 return -ENODEV;
Eric Dumazet96b52e62010-06-07 21:05:02 +0000338 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
340 err = -EADDRNOTAVAIL;
341
Eric Dumazet456b61b2010-11-23 13:12:15 +0000342 for_each_pmc_rcu(inet6, pmc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
344 continue;
345 if (ipv6_addr_equal(&pmc->addr, group))
346 break;
347 }
David L Stevens917f2f12005-07-08 17:45:16 -0700348 if (!pmc) { /* must have a prior join */
349 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 goto done;
David L Stevens917f2f12005-07-08 17:45:16 -0700351 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 /* if a source filter was set, must be the same mode as before */
353 if (pmc->sflist) {
David L Stevens917f2f12005-07-08 17:45:16 -0700354 if (pmc->sfmode != omode) {
355 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 goto done;
David L Stevens917f2f12005-07-08 17:45:16 -0700357 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 } else if (pmc->sfmode != omode) {
359 /* allow mode switches for empty-set filters */
360 ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
361 ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
362 pmc->sfmode = omode;
363 }
364
Eric Dumazet96b52e62010-06-07 21:05:02 +0000365 write_lock(&pmc->sflock);
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800366 pmclocked = 1;
367
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 psl = pmc->sflist;
369 if (!add) {
370 if (!psl)
David L Stevens917f2f12005-07-08 17:45:16 -0700371 goto done; /* err = -EADDRNOTAVAIL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 rv = !0;
373 for (i=0; i<psl->sl_count; i++) {
374 rv = memcmp(&psl->sl_addr[i], source,
375 sizeof(struct in6_addr));
376 if (rv == 0)
377 break;
378 }
379 if (rv) /* source not found */
David L Stevens917f2f12005-07-08 17:45:16 -0700380 goto done; /* err = -EADDRNOTAVAIL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700382 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
383 if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
384 leavegroup = 1;
385 goto done;
386 }
387
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 /* update the interface filter */
389 ip6_mc_del_src(idev, group, omode, 1, source, 1);
390
391 for (j=i+1; j<psl->sl_count; j++)
392 psl->sl_addr[j-1] = psl->sl_addr[j];
393 psl->sl_count--;
394 err = 0;
395 goto done;
396 }
397 /* else, add a new source to the filter */
398
399 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
400 err = -ENOBUFS;
401 goto done;
402 }
403 if (!psl || psl->sl_count == psl->sl_max) {
404 struct ip6_sf_socklist *newpsl;
405 int count = IP6_SFBLOCK;
406
407 if (psl)
408 count += psl->sl_max;
Kris Katterjohn8b3a7002006-01-11 15:56:43 -0800409 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 if (!newpsl) {
411 err = -ENOBUFS;
412 goto done;
413 }
414 newpsl->sl_max = count;
415 newpsl->sl_count = count - IP6_SFBLOCK;
416 if (psl) {
417 for (i=0; i<psl->sl_count; i++)
418 newpsl->sl_addr[i] = psl->sl_addr[i];
419 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
420 }
421 pmc->sflist = psl = newpsl;
422 }
423 rv = 1; /* > 0 for insert logic below if sl_count is 0 */
424 for (i=0; i<psl->sl_count; i++) {
425 rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr));
426 if (rv == 0)
427 break;
428 }
429 if (rv == 0) /* address already there is an error */
430 goto done;
431 for (j=psl->sl_count-1; j>=i; j--)
432 psl->sl_addr[j+1] = psl->sl_addr[j];
433 psl->sl_addr[i] = *source;
434 psl->sl_count++;
435 err = 0;
436 /* update the interface list */
437 ip6_mc_add_src(idev, group, omode, 1, source, 1);
438done:
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800439 if (pmclocked)
Eric Dumazet96b52e62010-06-07 21:05:02 +0000440 write_unlock(&pmc->sflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 read_unlock_bh(&idev->lock);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000442 rcu_read_unlock();
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700443 if (leavegroup)
444 return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 return err;
446}
447
448int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
449{
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000450 const struct in6_addr *group;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 struct ipv6_mc_socklist *pmc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 struct inet6_dev *idev;
453 struct ipv6_pinfo *inet6 = inet6_sk(sk);
454 struct ip6_sf_socklist *newpsl, *psl;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900455 struct net *net = sock_net(sk);
David L Stevens9951f032005-07-08 17:47:28 -0700456 int leavegroup = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 int i, err;
458
459 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
460
461 if (!ipv6_addr_is_multicast(group))
462 return -EINVAL;
463 if (gsf->gf_fmode != MCAST_INCLUDE &&
464 gsf->gf_fmode != MCAST_EXCLUDE)
465 return -EINVAL;
466
Eric Dumazet96b52e62010-06-07 21:05:02 +0000467 rcu_read_lock();
468 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469
Eric Dumazet96b52e62010-06-07 21:05:02 +0000470 if (!idev) {
471 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 return -ENODEV;
Eric Dumazet96b52e62010-06-07 21:05:02 +0000473 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
David S. Miller9c059892005-07-08 21:44:39 -0700475 err = 0;
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800476
David L Stevens9951f032005-07-08 17:47:28 -0700477 if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
478 leavegroup = 1;
479 goto done;
480 }
481
Eric Dumazet456b61b2010-11-23 13:12:15 +0000482 for_each_pmc_rcu(inet6, pmc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 if (pmc->ifindex != gsf->gf_interface)
484 continue;
485 if (ipv6_addr_equal(&pmc->addr, group))
486 break;
487 }
David L Stevens917f2f12005-07-08 17:45:16 -0700488 if (!pmc) { /* must have a prior join */
489 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 goto done;
David L Stevens917f2f12005-07-08 17:45:16 -0700491 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 if (gsf->gf_numsrc) {
Kris Katterjohn8b3a7002006-01-11 15:56:43 -0800493 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
494 GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 if (!newpsl) {
496 err = -ENOBUFS;
497 goto done;
498 }
499 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
500 for (i=0; i<newpsl->sl_count; ++i) {
501 struct sockaddr_in6 *psin6;
502
503 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
504 newpsl->sl_addr[i] = psin6->sin6_addr;
505 }
506 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
507 newpsl->sl_count, newpsl->sl_addr, 0);
508 if (err) {
509 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
510 goto done;
511 }
Yan Zheng8713dbf2005-10-28 08:02:08 +0800512 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 newpsl = NULL;
Yan Zheng8713dbf2005-10-28 08:02:08 +0800514 (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
515 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800516
Eric Dumazet96b52e62010-06-07 21:05:02 +0000517 write_lock(&pmc->sflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 psl = pmc->sflist;
519 if (psl) {
520 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
521 psl->sl_count, psl->sl_addr, 0);
522 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
523 } else
524 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
525 pmc->sflist = newpsl;
526 pmc->sfmode = gsf->gf_fmode;
Eric Dumazet96b52e62010-06-07 21:05:02 +0000527 write_unlock(&pmc->sflock);
David L Stevens917f2f12005-07-08 17:45:16 -0700528 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529done:
530 read_unlock_bh(&idev->lock);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000531 rcu_read_unlock();
David L Stevens9951f032005-07-08 17:47:28 -0700532 if (leavegroup)
533 err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 return err;
535}
536
537int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
538 struct group_filter __user *optval, int __user *optlen)
539{
540 int err, i, count, copycount;
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000541 const struct in6_addr *group;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 struct ipv6_mc_socklist *pmc;
543 struct inet6_dev *idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 struct ipv6_pinfo *inet6 = inet6_sk(sk);
545 struct ip6_sf_socklist *psl;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900546 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547
548 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
549
550 if (!ipv6_addr_is_multicast(group))
551 return -EINVAL;
552
Eric Dumazet96b52e62010-06-07 21:05:02 +0000553 rcu_read_lock();
554 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555
Eric Dumazet96b52e62010-06-07 21:05:02 +0000556 if (!idev) {
557 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 return -ENODEV;
Eric Dumazet96b52e62010-06-07 21:05:02 +0000559 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560
561 err = -EADDRNOTAVAIL;
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800562 /*
563 * changes to the ipv6_mc_list require the socket lock and
564 * a read lock on ip6_sk_mc_lock. We have the socket lock,
565 * so reading the list is safe.
566 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567
Eric Dumazet456b61b2010-11-23 13:12:15 +0000568 for_each_pmc_rcu(inet6, pmc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 if (pmc->ifindex != gsf->gf_interface)
570 continue;
571 if (ipv6_addr_equal(group, &pmc->addr))
572 break;
573 }
574 if (!pmc) /* must have a prior join */
575 goto done;
576 gsf->gf_fmode = pmc->sfmode;
577 psl = pmc->sflist;
578 count = psl ? psl->sl_count : 0;
579 read_unlock_bh(&idev->lock);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000580 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581
582 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
583 gsf->gf_numsrc = count;
584 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
585 copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
586 return -EFAULT;
587 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800588 /* changes to psl require the socket lock, a read lock on
589 * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We
590 * have the socket lock, so reading here is safe.
591 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 for (i=0; i<copycount; i++) {
593 struct sockaddr_in6 *psin6;
594 struct sockaddr_storage ss;
595
596 psin6 = (struct sockaddr_in6 *)&ss;
597 memset(&ss, 0, sizeof(ss));
598 psin6->sin6_family = AF_INET6;
599 psin6->sin6_addr = psl->sl_addr[i];
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900600 if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 return -EFAULT;
602 }
603 return 0;
604done:
605 read_unlock_bh(&idev->lock);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000606 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 return err;
608}
609
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900610int inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
611 const struct in6_addr *src_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612{
613 struct ipv6_pinfo *np = inet6_sk(sk);
614 struct ipv6_mc_socklist *mc;
615 struct ip6_sf_socklist *psl;
616 int rv = 1;
617
Eric Dumazet456b61b2010-11-23 13:12:15 +0000618 rcu_read_lock();
619 for_each_pmc_rcu(np, mc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 if (ipv6_addr_equal(&mc->addr, mc_addr))
621 break;
622 }
623 if (!mc) {
Eric Dumazet456b61b2010-11-23 13:12:15 +0000624 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 return 1;
626 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800627 read_lock(&mc->sflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 psl = mc->sflist;
629 if (!psl) {
630 rv = mc->sfmode == MCAST_EXCLUDE;
631 } else {
632 int i;
633
634 for (i=0; i<psl->sl_count; i++) {
635 if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
636 break;
637 }
638 if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
639 rv = 0;
640 if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
641 rv = 0;
642 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800643 read_unlock(&mc->sflock);
Eric Dumazet456b61b2010-11-23 13:12:15 +0000644 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645
646 return rv;
647}
648
649static void ma_put(struct ifmcaddr6 *mc)
650{
651 if (atomic_dec_and_test(&mc->mca_refcnt)) {
652 in6_dev_put(mc->idev);
653 kfree(mc);
654 }
655}
656
657static void igmp6_group_added(struct ifmcaddr6 *mc)
658{
659 struct net_device *dev = mc->idev->dev;
660 char buf[MAX_ADDR_LEN];
661
662 spin_lock_bh(&mc->mca_lock);
663 if (!(mc->mca_flags&MAF_LOADED)) {
664 mc->mca_flags |= MAF_LOADED;
665 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
Jiri Pirko22bedad32010-04-01 21:22:57 +0000666 dev_mc_add(dev, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 }
668 spin_unlock_bh(&mc->mca_lock);
669
670 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
671 return;
672
673 if (MLD_V1_SEEN(mc->idev)) {
674 igmp6_join_group(mc);
675 return;
676 }
677 /* else v2 */
678
679 mc->mca_crcount = mc->idev->mc_qrv;
680 mld_ifc_event(mc->idev);
681}
682
683static void igmp6_group_dropped(struct ifmcaddr6 *mc)
684{
685 struct net_device *dev = mc->idev->dev;
686 char buf[MAX_ADDR_LEN];
687
688 spin_lock_bh(&mc->mca_lock);
689 if (mc->mca_flags&MAF_LOADED) {
690 mc->mca_flags &= ~MAF_LOADED;
691 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
Jiri Pirko22bedad32010-04-01 21:22:57 +0000692 dev_mc_del(dev, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 }
694
695 if (mc->mca_flags & MAF_NOREPORT)
696 goto done;
697 spin_unlock_bh(&mc->mca_lock);
698
699 if (!mc->idev->dead)
700 igmp6_leave_group(mc);
701
702 spin_lock_bh(&mc->mca_lock);
703 if (del_timer(&mc->mca_timer))
704 atomic_dec(&mc->mca_refcnt);
705done:
706 ip6_mc_clear_src(mc);
707 spin_unlock_bh(&mc->mca_lock);
708}
709
710/*
711 * deleted ifmcaddr6 manipulation
712 */
713static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
714{
715 struct ifmcaddr6 *pmc;
716
717 /* this is an "ifmcaddr6" for convenience; only the fields below
718 * are actually used. In particular, the refcnt and users are not
719 * used for management of the delete list. Using the same structure
720 * for deleted items allows change reports to use common code with
721 * non-deleted or query-response MCA's.
722 */
Ingo Oeser0c600ed2006-03-20 23:01:32 -0800723 pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 if (!pmc)
725 return;
Ingo Oeser0c600ed2006-03-20 23:01:32 -0800726
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 spin_lock_bh(&im->mca_lock);
728 spin_lock_init(&pmc->mca_lock);
729 pmc->idev = im->idev;
730 in6_dev_hold(idev);
731 pmc->mca_addr = im->mca_addr;
732 pmc->mca_crcount = idev->mc_qrv;
733 pmc->mca_sfmode = im->mca_sfmode;
734 if (pmc->mca_sfmode == MCAST_INCLUDE) {
735 struct ip6_sf_list *psf;
736
737 pmc->mca_tomb = im->mca_tomb;
738 pmc->mca_sources = im->mca_sources;
739 im->mca_tomb = im->mca_sources = NULL;
740 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
741 psf->sf_crcount = pmc->mca_crcount;
742 }
743 spin_unlock_bh(&im->mca_lock);
744
Stephen Hemminger6457d262010-02-17 18:48:44 -0800745 spin_lock_bh(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 pmc->next = idev->mc_tomb;
747 idev->mc_tomb = pmc;
Stephen Hemminger6457d262010-02-17 18:48:44 -0800748 spin_unlock_bh(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749}
750
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000751static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *pmca)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752{
753 struct ifmcaddr6 *pmc, *pmc_prev;
754 struct ip6_sf_list *psf, *psf_next;
755
Stephen Hemminger6457d262010-02-17 18:48:44 -0800756 spin_lock_bh(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 pmc_prev = NULL;
758 for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) {
759 if (ipv6_addr_equal(&pmc->mca_addr, pmca))
760 break;
761 pmc_prev = pmc;
762 }
763 if (pmc) {
764 if (pmc_prev)
765 pmc_prev->next = pmc->next;
766 else
767 idev->mc_tomb = pmc->next;
768 }
Stephen Hemminger6457d262010-02-17 18:48:44 -0800769 spin_unlock_bh(&idev->mc_lock);
770
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 if (pmc) {
772 for (psf=pmc->mca_tomb; psf; psf=psf_next) {
773 psf_next = psf->sf_next;
774 kfree(psf);
775 }
776 in6_dev_put(pmc->idev);
777 kfree(pmc);
778 }
779}
780
781static void mld_clear_delrec(struct inet6_dev *idev)
782{
783 struct ifmcaddr6 *pmc, *nextpmc;
784
Stephen Hemminger6457d262010-02-17 18:48:44 -0800785 spin_lock_bh(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 pmc = idev->mc_tomb;
787 idev->mc_tomb = NULL;
Stephen Hemminger6457d262010-02-17 18:48:44 -0800788 spin_unlock_bh(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789
790 for (; pmc; pmc = nextpmc) {
791 nextpmc = pmc->next;
792 ip6_mc_clear_src(pmc);
793 in6_dev_put(pmc->idev);
794 kfree(pmc);
795 }
796
797 /* clear dead sources, too */
798 read_lock_bh(&idev->lock);
799 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
800 struct ip6_sf_list *psf, *psf_next;
801
802 spin_lock_bh(&pmc->mca_lock);
803 psf = pmc->mca_tomb;
804 pmc->mca_tomb = NULL;
805 spin_unlock_bh(&pmc->mca_lock);
806 for (; psf; psf=psf_next) {
807 psf_next = psf->sf_next;
808 kfree(psf);
809 }
810 }
811 read_unlock_bh(&idev->lock);
812}
813
814
815/*
816 * device multicast group inc (add if not found)
817 */
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900818int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819{
820 struct ifmcaddr6 *mc;
821 struct inet6_dev *idev;
822
Eric Dumazet96b52e62010-06-07 21:05:02 +0000823 /* we need to take a reference on idev */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 idev = in6_dev_get(dev);
825
826 if (idev == NULL)
827 return -EINVAL;
828
829 write_lock_bh(&idev->lock);
830 if (idev->dead) {
831 write_unlock_bh(&idev->lock);
832 in6_dev_put(idev);
833 return -ENODEV;
834 }
835
836 for (mc = idev->mc_list; mc; mc = mc->next) {
837 if (ipv6_addr_equal(&mc->mca_addr, addr)) {
838 mc->mca_users++;
839 write_unlock_bh(&idev->lock);
840 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
841 NULL, 0);
842 in6_dev_put(idev);
843 return 0;
844 }
845 }
846
847 /*
848 * not found: create a new one.
849 */
850
Ingo Oeser0c600ed2006-03-20 23:01:32 -0800851 mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852
853 if (mc == NULL) {
854 write_unlock_bh(&idev->lock);
855 in6_dev_put(idev);
856 return -ENOMEM;
857 }
858
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -0800859 setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860
861 ipv6_addr_copy(&mc->mca_addr, addr);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000862 mc->idev = idev; /* (reference taken) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 mc->mca_users = 1;
864 /* mca_stamp should be updated upon changes */
865 mc->mca_cstamp = mc->mca_tstamp = jiffies;
866 atomic_set(&mc->mca_refcnt, 2);
867 spin_lock_init(&mc->mca_lock);
868
869 /* initial mode is (EX, empty) */
870 mc->mca_sfmode = MCAST_EXCLUDE;
871 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
872
873 if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
874 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
875 mc->mca_flags |= MAF_NOREPORT;
876
877 mc->next = idev->mc_list;
878 idev->mc_list = mc;
879 write_unlock_bh(&idev->lock);
880
881 mld_del_delrec(idev, &mc->mca_addr);
882 igmp6_group_added(mc);
883 ma_put(mc);
884 return 0;
885}
886
887/*
888 * device multicast group del
889 */
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900890int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891{
892 struct ifmcaddr6 *ma, **map;
893
894 write_lock_bh(&idev->lock);
895 for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) {
896 if (ipv6_addr_equal(&ma->mca_addr, addr)) {
897 if (--ma->mca_users == 0) {
898 *map = ma->next;
899 write_unlock_bh(&idev->lock);
900
901 igmp6_group_dropped(ma);
902
903 ma_put(ma);
904 return 0;
905 }
906 write_unlock_bh(&idev->lock);
907 return 0;
908 }
909 }
910 write_unlock_bh(&idev->lock);
911
912 return -ENOENT;
913}
914
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900915int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916{
Eric Dumazet96b52e62010-06-07 21:05:02 +0000917 struct inet6_dev *idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 int err;
919
Eric Dumazet96b52e62010-06-07 21:05:02 +0000920 rcu_read_lock();
921
922 idev = __in6_dev_get(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 if (!idev)
Eric Dumazet96b52e62010-06-07 21:05:02 +0000924 err = -ENODEV;
925 else
926 err = __ipv6_dev_mc_dec(idev, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927
Eric Dumazet96b52e62010-06-07 21:05:02 +0000928 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 return err;
930}
931
932/*
933 * identify MLD packets for MLD filter exceptions
934 */
935int ipv6_is_mld(struct sk_buff *skb, int nexthdr)
936{
937 struct icmp6hdr *pic;
938
939 if (nexthdr != IPPROTO_ICMPV6)
940 return 0;
941
942 if (!pskb_may_pull(skb, sizeof(struct icmp6hdr)))
943 return 0;
944
Arnaldo Carvalho de Melocc70ab22007-03-13 14:03:22 -0300945 pic = icmp6_hdr(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946
947 switch (pic->icmp6_type) {
948 case ICMPV6_MGM_QUERY:
949 case ICMPV6_MGM_REPORT:
950 case ICMPV6_MGM_REDUCTION:
951 case ICMPV6_MLD2_REPORT:
952 return 1;
953 default:
954 break;
955 }
956 return 0;
957}
958
959/*
960 * check if the interface/address pair is valid
961 */
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900962int ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
963 const struct in6_addr *src_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964{
965 struct inet6_dev *idev;
966 struct ifmcaddr6 *mc;
967 int rv = 0;
968
Eric Dumazet96b52e62010-06-07 21:05:02 +0000969 rcu_read_lock();
970 idev = __in6_dev_get(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 if (idev) {
972 read_lock_bh(&idev->lock);
973 for (mc = idev->mc_list; mc; mc=mc->next) {
974 if (ipv6_addr_equal(&mc->mca_addr, group))
975 break;
976 }
977 if (mc) {
978 if (src_addr && !ipv6_addr_any(src_addr)) {
979 struct ip6_sf_list *psf;
980
981 spin_lock_bh(&mc->mca_lock);
982 for (psf=mc->mca_sources;psf;psf=psf->sf_next) {
983 if (ipv6_addr_equal(&psf->sf_addr, src_addr))
984 break;
985 }
986 if (psf)
987 rv = psf->sf_count[MCAST_INCLUDE] ||
988 psf->sf_count[MCAST_EXCLUDE] !=
989 mc->mca_sfcount[MCAST_EXCLUDE];
990 else
991 rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0;
992 spin_unlock_bh(&mc->mca_lock);
993 } else
994 rv = 1; /* don't filter unspecified source */
995 }
996 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 }
Eric Dumazet96b52e62010-06-07 21:05:02 +0000998 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 return rv;
1000}
1001
1002static void mld_gq_start_timer(struct inet6_dev *idev)
1003{
1004 int tv = net_random() % idev->mc_maxdelay;
1005
1006 idev->mc_gq_running = 1;
1007 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
1008 in6_dev_hold(idev);
1009}
1010
1011static void mld_ifc_start_timer(struct inet6_dev *idev, int delay)
1012{
1013 int tv = net_random() % delay;
1014
1015 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
1016 in6_dev_hold(idev);
1017}
1018
1019/*
1020 * IGMP handling (alias multicast ICMPv6 messages)
1021 */
1022
1023static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
1024{
1025 unsigned long delay = resptime;
1026
1027 /* Do not start timer for these addresses */
1028 if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
1029 IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
1030 return;
1031
1032 if (del_timer(&ma->mca_timer)) {
1033 atomic_dec(&ma->mca_refcnt);
1034 delay = ma->mca_timer.expires - jiffies;
1035 }
1036
1037 if (delay >= resptime) {
1038 if (resptime)
1039 delay = net_random() % resptime;
1040 else
1041 delay = 1;
1042 }
1043 ma->mca_timer.expires = jiffies + delay;
1044 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1045 atomic_inc(&ma->mca_refcnt);
1046 ma->mca_flags |= MAF_TIMER_RUNNING;
1047}
1048
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001049/* mark EXCLUDE-mode sources */
1050static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001051 const struct in6_addr *srcs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052{
1053 struct ip6_sf_list *psf;
1054 int i, scount;
1055
1056 scount = 0;
1057 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1058 if (scount == nsrcs)
1059 break;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001060 for (i=0; i<nsrcs; i++) {
1061 /* skip inactive filters */
Yan, Zhenge05c4ad32011-08-23 22:54:37 +00001062 if (psf->sf_count[MCAST_INCLUDE] ||
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001063 pmc->mca_sfcount[MCAST_EXCLUDE] !=
1064 psf->sf_count[MCAST_EXCLUDE])
1065 continue;
1066 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1067 scount++;
1068 break;
1069 }
1070 }
1071 }
1072 pmc->mca_flags &= ~MAF_GSQUERY;
1073 if (scount == nsrcs) /* all sources excluded */
1074 return 0;
1075 return 1;
1076}
1077
1078static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001079 const struct in6_addr *srcs)
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001080{
1081 struct ip6_sf_list *psf;
1082 int i, scount;
1083
1084 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1085 return mld_xmarksources(pmc, nsrcs, srcs);
1086
1087 /* mark INCLUDE-mode sources */
1088
1089 scount = 0;
1090 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1091 if (scount == nsrcs)
1092 break;
1093 for (i=0; i<nsrcs; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1095 psf->sf_gsresp = 1;
1096 scount++;
1097 break;
1098 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001099 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001101 if (!scount) {
1102 pmc->mca_flags &= ~MAF_GSQUERY;
1103 return 0;
1104 }
1105 pmc->mca_flags |= MAF_GSQUERY;
1106 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107}
1108
Eric Dumazet96b52e62010-06-07 21:05:02 +00001109/* called with rcu_read_lock() */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110int igmp6_event_query(struct sk_buff *skb)
1111{
Yan Zheng97300b52005-10-31 20:09:45 +08001112 struct mld2_query *mlh2 = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 struct ifmcaddr6 *ma;
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001114 const struct in6_addr *group;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115 unsigned long max_delay;
1116 struct inet6_dev *idev;
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001117 struct mld_msg *mld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 int group_type;
1119 int mark = 0;
1120 int len;
1121
1122 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1123 return -EINVAL;
1124
1125 /* compute payload length excluding extension headers */
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -07001126 len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr);
Arnaldo Carvalho de Melocfe1fc72007-03-16 17:26:39 -03001127 len -= skb_network_header_len(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128
1129 /* Drop queries with not link local source */
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -07001130 if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 return -EINVAL;
1132
Eric Dumazet96b52e62010-06-07 21:05:02 +00001133 idev = __in6_dev_get(skb->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134
1135 if (idev == NULL)
1136 return 0;
1137
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001138 mld = (struct mld_msg *)icmp6_hdr(skb);
1139 group = &mld->mld_mca;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140 group_type = ipv6_addr_type(group);
1141
1142 if (group_type != IPV6_ADDR_ANY &&
Eric Dumazet96b52e62010-06-07 21:05:02 +00001143 !(group_type&IPV6_ADDR_MULTICAST))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145
1146 if (len == 24) {
1147 int switchback;
1148 /* MLDv1 router present */
1149
1150 /* Translate milliseconds to jiffies */
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001151 max_delay = (ntohs(mld->mld_maxdelay)*HZ)/1000;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152
1153 switchback = (idev->mc_qrv + 1) * max_delay;
1154 idev->mc_v1_seen = jiffies + switchback;
1155
1156 /* cancel the interface change timer */
1157 idev->mc_ifc_count = 0;
1158 if (del_timer(&idev->mc_ifc_timer))
1159 __in6_dev_put(idev);
1160 /* clear deleted report items */
1161 mld_clear_delrec(idev);
1162 } else if (len >= 28) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001163 int srcs_offset = sizeof(struct mld2_query) -
Yan Zheng97300b52005-10-31 20:09:45 +08001164 sizeof(struct icmp6hdr);
Eric Dumazet96b52e62010-06-07 21:05:02 +00001165 if (!pskb_may_pull(skb, srcs_offset))
Yan Zheng97300b52005-10-31 20:09:45 +08001166 return -EINVAL;
Eric Dumazet96b52e62010-06-07 21:05:02 +00001167
Arnaldo Carvalho de Melo9c702202007-04-25 18:04:18 -07001168 mlh2 = (struct mld2_query *)skb_transport_header(skb);
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001169 max_delay = (MLDV2_MRC(ntohs(mlh2->mld2q_mrc))*HZ)/1000;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 if (!max_delay)
1171 max_delay = 1;
1172 idev->mc_maxdelay = max_delay;
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001173 if (mlh2->mld2q_qrv)
1174 idev->mc_qrv = mlh2->mld2q_qrv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175 if (group_type == IPV6_ADDR_ANY) { /* general query */
Eric Dumazet96b52e62010-06-07 21:05:02 +00001176 if (mlh2->mld2q_nsrcs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 return -EINVAL; /* no sources allowed */
Eric Dumazet96b52e62010-06-07 21:05:02 +00001178
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179 mld_gq_start_timer(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 return 0;
1181 }
1182 /* mark sources to include, if group & source-specific */
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001183 if (mlh2->mld2q_nsrcs != 0) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001184 if (!pskb_may_pull(skb, srcs_offset +
Eric Dumazet96b52e62010-06-07 21:05:02 +00001185 ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr)))
Yan Zheng97300b52005-10-31 20:09:45 +08001186 return -EINVAL;
Eric Dumazet96b52e62010-06-07 21:05:02 +00001187
Arnaldo Carvalho de Melo9c702202007-04-25 18:04:18 -07001188 mlh2 = (struct mld2_query *)skb_transport_header(skb);
Yan Zheng97300b52005-10-31 20:09:45 +08001189 mark = 1;
1190 }
Eric Dumazet96b52e62010-06-07 21:05:02 +00001191 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193
1194 read_lock_bh(&idev->lock);
1195 if (group_type == IPV6_ADDR_ANY) {
1196 for (ma = idev->mc_list; ma; ma=ma->next) {
1197 spin_lock_bh(&ma->mca_lock);
1198 igmp6_group_queried(ma, max_delay);
1199 spin_unlock_bh(&ma->mca_lock);
1200 }
1201 } else {
1202 for (ma = idev->mc_list; ma; ma=ma->next) {
David L Stevens7add2a42006-01-24 13:06:39 -08001203 if (!ipv6_addr_equal(group, &ma->mca_addr))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204 continue;
1205 spin_lock_bh(&ma->mca_lock);
1206 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1207 /* gsquery <- gsquery && mark */
1208 if (!mark)
1209 ma->mca_flags &= ~MAF_GSQUERY;
1210 } else {
1211 /* gsquery <- mark */
1212 if (mark)
1213 ma->mca_flags |= MAF_GSQUERY;
1214 else
1215 ma->mca_flags &= ~MAF_GSQUERY;
1216 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001217 if (!(ma->mca_flags & MAF_GSQUERY) ||
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001218 mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs))
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001219 igmp6_group_queried(ma, max_delay);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 spin_unlock_bh(&ma->mca_lock);
David L Stevens7add2a42006-01-24 13:06:39 -08001221 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222 }
1223 }
1224 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001225
1226 return 0;
1227}
1228
Eric Dumazet96b52e62010-06-07 21:05:02 +00001229/* called with rcu_read_lock() */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230int igmp6_event_report(struct sk_buff *skb)
1231{
1232 struct ifmcaddr6 *ma;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 struct inet6_dev *idev;
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001234 struct mld_msg *mld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235 int addr_type;
1236
1237 /* Our own report looped back. Ignore it. */
1238 if (skb->pkt_type == PACKET_LOOPBACK)
1239 return 0;
1240
David Stevens24c69272005-12-02 20:32:59 -08001241 /* send our report if the MC router may not have heard this report */
1242 if (skb->pkt_type != PACKET_MULTICAST &&
1243 skb->pkt_type != PACKET_BROADCAST)
1244 return 0;
1245
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001246 if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247 return -EINVAL;
1248
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001249 mld = (struct mld_msg *)icmp6_hdr(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250
1251 /* Drop reports with not link local source */
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -07001252 addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001253 if (addr_type != IPV6_ADDR_ANY &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 !(addr_type&IPV6_ADDR_LINKLOCAL))
1255 return -EINVAL;
1256
Eric Dumazet96b52e62010-06-07 21:05:02 +00001257 idev = __in6_dev_get(skb->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258 if (idev == NULL)
1259 return -ENODEV;
1260
1261 /*
1262 * Cancel the timer for this group
1263 */
1264
1265 read_lock_bh(&idev->lock);
1266 for (ma = idev->mc_list; ma; ma=ma->next) {
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001267 if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268 spin_lock(&ma->mca_lock);
1269 if (del_timer(&ma->mca_timer))
1270 atomic_dec(&ma->mca_refcnt);
1271 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1272 spin_unlock(&ma->mca_lock);
1273 break;
1274 }
1275 }
1276 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277 return 0;
1278}
1279
1280static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1281 int gdeleted, int sdeleted)
1282{
1283 switch (type) {
1284 case MLD2_MODE_IS_INCLUDE:
1285 case MLD2_MODE_IS_EXCLUDE:
1286 if (gdeleted || sdeleted)
1287 return 0;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001288 if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
1289 if (pmc->mca_sfmode == MCAST_INCLUDE)
1290 return 1;
1291 /* don't include if this source is excluded
1292 * in all filters
1293 */
1294 if (psf->sf_count[MCAST_INCLUDE])
David L Stevens7add2a42006-01-24 13:06:39 -08001295 return type == MLD2_MODE_IS_INCLUDE;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001296 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1297 psf->sf_count[MCAST_EXCLUDE];
1298 }
1299 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300 case MLD2_CHANGE_TO_INCLUDE:
1301 if (gdeleted || sdeleted)
1302 return 0;
1303 return psf->sf_count[MCAST_INCLUDE] != 0;
1304 case MLD2_CHANGE_TO_EXCLUDE:
1305 if (gdeleted || sdeleted)
1306 return 0;
1307 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1308 psf->sf_count[MCAST_INCLUDE])
1309 return 0;
1310 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1311 psf->sf_count[MCAST_EXCLUDE];
1312 case MLD2_ALLOW_NEW_SOURCES:
1313 if (gdeleted || !psf->sf_crcount)
1314 return 0;
1315 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1316 case MLD2_BLOCK_OLD_SOURCES:
1317 if (pmc->mca_sfmode == MCAST_INCLUDE)
1318 return gdeleted || (psf->sf_crcount && sdeleted);
1319 return psf->sf_crcount && !gdeleted && !sdeleted;
1320 }
1321 return 0;
1322}
1323
1324static int
1325mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1326{
1327 struct ip6_sf_list *psf;
1328 int scount = 0;
1329
1330 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1331 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1332 continue;
1333 scount++;
1334 }
1335 return scount;
1336}
1337
1338static struct sk_buff *mld_newpack(struct net_device *dev, int size)
1339{
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001340 struct net *net = dev_net(dev);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08001341 struct sock *sk = net->ipv6.igmp_sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342 struct sk_buff *skb;
1343 struct mld2_report *pmr;
1344 struct in6_addr addr_buf;
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09001345 const struct in6_addr *saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346 int err;
1347 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1348 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1349 IPV6_TLV_PADN, 0 };
1350
1351 /* we assume size > sizeof(ra) here */
Eric Dumazet72e09ad2010-06-05 03:03:30 -07001352 size += LL_ALLOCATED_SPACE(dev);
1353 /* limit our allocations to order-0 page */
1354 size = min_t(int, size, SKB_MAX_ORDER(0, 0));
1355 skb = sock_alloc_send_skb(sk, size, 1, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356
Stephen Hemmingercfcabdc2007-10-09 01:59:42 -07001357 if (!skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358 return NULL;
1359
1360 skb_reserve(skb, LL_RESERVED_SPACE(dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361
Neil Horman95c385b2007-04-25 17:08:10 -07001362 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363 /* <draft-ietf-magma-mld-source-05.txt>:
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001364 * use unspecified address as the source address
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365 * when a valid link-local address is not available.
1366 */
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09001367 saddr = &in6addr_any;
1368 } else
1369 saddr = &addr_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09001371 ip6_nd_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372
1373 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1374
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -07001375 skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data);
Arnaldo Carvalho de Melod10ba342007-03-14 21:05:37 -03001376 skb_put(skb, sizeof(*pmr));
1377 pmr = (struct mld2_report *)skb_transport_header(skb);
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001378 pmr->mld2r_type = ICMPV6_MLD2_REPORT;
1379 pmr->mld2r_resv1 = 0;
1380 pmr->mld2r_cksum = 0;
1381 pmr->mld2r_resv2 = 0;
1382 pmr->mld2r_ngrec = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383 return skb;
1384}
1385
1386static void mld_sendpack(struct sk_buff *skb)
1387{
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -07001388 struct ipv6hdr *pip6 = ipv6_hdr(skb);
Arnaldo Carvalho de Melo9c702202007-04-25 18:04:18 -07001389 struct mld2_report *pmr =
1390 (struct mld2_report *)skb_transport_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 int payload_len, mldlen;
Eric Dumazet96b52e62010-06-07 21:05:02 +00001392 struct inet6_dev *idev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001393 struct net *net = dev_net(skb->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394 int err;
David S. Miller4c9483b2011-03-12 16:22:43 -05001395 struct flowi6 fl6;
Eric Dumazetadf30902009-06-02 05:19:30 +00001396 struct dst_entry *dst;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397
Eric Dumazet96b52e62010-06-07 21:05:02 +00001398 rcu_read_lock();
1399 idev = __in6_dev_get(skb->dev);
Neil Hormanedf391f2009-04-27 02:45:02 -07001400 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
1401
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -07001402 payload_len = (skb->tail - skb->network_header) - sizeof(*pip6);
1403 mldlen = skb->tail - skb->transport_header;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404 pip6->payload_len = htons(payload_len);
1405
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001406 pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
1407 IPPROTO_ICMPV6,
1408 csum_partial(skb_transport_header(skb),
1409 mldlen, 0));
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001410
Eric Dumazetadf30902009-06-02 05:19:30 +00001411 dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001412
Eric Dumazetadf30902009-06-02 05:19:30 +00001413 if (!dst) {
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001414 err = -ENOMEM;
1415 goto err_out;
1416 }
1417
David S. Miller4c9483b2011-03-12 16:22:43 -05001418 icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT,
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001419 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1420 skb->dev->ifindex);
1421
David S. Miller4c9483b2011-03-12 16:22:43 -05001422 dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), NULL, 0);
David S. Miller452edd52011-03-02 13:27:41 -08001423 err = 0;
1424 if (IS_ERR(dst)) {
1425 err = PTR_ERR(dst);
1426 dst = NULL;
1427 }
Eric Dumazetadf30902009-06-02 05:19:30 +00001428 skb_dst_set(skb, dst);
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001429 if (err)
1430 goto err_out;
1431
Neil Hormanedf391f2009-04-27 02:45:02 -07001432 payload_len = skb->len;
1433
Jan Engelhardtb2e0b382010-03-23 04:09:07 +01001434 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001435 dst_output);
1436out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437 if (!err) {
Denis V. Lunev5a57d4c2008-10-08 10:34:14 -07001438 ICMP6MSGOUT_INC_STATS_BH(net, idev, ICMPV6_MLD2_REPORT);
Denis V. Luneve41b5362008-10-08 10:33:26 -07001439 ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS);
Neil Hormanedf391f2009-04-27 02:45:02 -07001440 IP6_UPD_PO_STATS_BH(net, idev, IPSTATS_MIB_OUTMCAST, payload_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441 } else
Denis V. Lunev483a47d2008-10-08 11:09:27 -07001442 IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_OUTDISCARDS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443
Eric Dumazet96b52e62010-06-07 21:05:02 +00001444 rcu_read_unlock();
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001445 return;
1446
1447err_out:
1448 kfree_skb(skb);
1449 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450}
1451
1452static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
1453{
Yan Zhengfab10fe2005-10-05 12:08:13 -07001454 return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455}
1456
1457static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1458 int type, struct mld2_grec **ppgr)
1459{
1460 struct net_device *dev = pmc->idev->dev;
1461 struct mld2_report *pmr;
1462 struct mld2_grec *pgr;
1463
1464 if (!skb)
1465 skb = mld_newpack(dev, dev->mtu);
1466 if (!skb)
1467 return NULL;
1468 pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
1469 pgr->grec_type = type;
1470 pgr->grec_auxwords = 0;
1471 pgr->grec_nsrcs = 0;
1472 pgr->grec_mca = pmc->mca_addr; /* structure copy */
Arnaldo Carvalho de Melo9c702202007-04-25 18:04:18 -07001473 pmr = (struct mld2_report *)skb_transport_header(skb);
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001474 pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475 *ppgr = pgr;
1476 return skb;
1477}
1478
1479#define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
1480 skb_tailroom(skb)) : 0)
1481
1482static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1483 int type, int gdeleted, int sdeleted)
1484{
1485 struct net_device *dev = pmc->idev->dev;
1486 struct mld2_report *pmr;
1487 struct mld2_grec *pgr = NULL;
1488 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001489 int scount, stotal, first, isquery, truncate;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490
1491 if (pmc->mca_flags & MAF_NOREPORT)
1492 return skb;
1493
1494 isquery = type == MLD2_MODE_IS_INCLUDE ||
1495 type == MLD2_MODE_IS_EXCLUDE;
1496 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1497 type == MLD2_CHANGE_TO_EXCLUDE;
1498
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001499 stotal = scount = 0;
1500
Linus Torvalds1da177e2005-04-16 15:20:36 -07001501 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1502
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001503 if (!*psf_list)
1504 goto empty_source;
1505
Arnaldo Carvalho de Melo9c702202007-04-25 18:04:18 -07001506 pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507
1508 /* EX and TO_EX get a fresh packet, if needed */
1509 if (truncate) {
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001510 if (pmr && pmr->mld2r_ngrec &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1512 if (skb)
1513 mld_sendpack(skb);
1514 skb = mld_newpack(dev, dev->mtu);
1515 }
1516 }
1517 first = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518 psf_prev = NULL;
1519 for (psf=*psf_list; psf; psf=psf_next) {
1520 struct in6_addr *psrc;
1521
1522 psf_next = psf->sf_next;
1523
1524 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1525 psf_prev = psf;
1526 continue;
1527 }
1528
1529 /* clear marks on query responses */
1530 if (isquery)
1531 psf->sf_gsresp = 0;
1532
1533 if (AVAILABLE(skb) < sizeof(*psrc) +
1534 first*sizeof(struct mld2_grec)) {
1535 if (truncate && !first)
1536 break; /* truncate these */
1537 if (pgr)
1538 pgr->grec_nsrcs = htons(scount);
1539 if (skb)
1540 mld_sendpack(skb);
1541 skb = mld_newpack(dev, dev->mtu);
1542 first = 1;
1543 scount = 0;
1544 }
1545 if (first) {
1546 skb = add_grhead(skb, pmc, type, &pgr);
1547 first = 0;
1548 }
Alexey Dobriyancc63f702007-02-06 14:35:25 -08001549 if (!skb)
1550 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1552 *psrc = psf->sf_addr;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001553 scount++; stotal++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1555 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1556 psf->sf_crcount--;
1557 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1558 if (psf_prev)
1559 psf_prev->sf_next = psf->sf_next;
1560 else
1561 *psf_list = psf->sf_next;
1562 kfree(psf);
1563 continue;
1564 }
1565 }
1566 psf_prev = psf;
1567 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001568
1569empty_source:
1570 if (!stotal) {
1571 if (type == MLD2_ALLOW_NEW_SOURCES ||
1572 type == MLD2_BLOCK_OLD_SOURCES)
1573 return skb;
1574 if (pmc->mca_crcount || isquery) {
1575 /* make sure we have room for group header */
1576 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
1577 mld_sendpack(skb);
1578 skb = NULL; /* add_grhead will get a new one */
1579 }
1580 skb = add_grhead(skb, pmc, type, &pgr);
1581 }
1582 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583 if (pgr)
1584 pgr->grec_nsrcs = htons(scount);
1585
1586 if (isquery)
1587 pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
1588 return skb;
1589}
1590
1591static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1592{
1593 struct sk_buff *skb = NULL;
1594 int type;
1595
1596 if (!pmc) {
1597 read_lock_bh(&idev->lock);
1598 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1599 if (pmc->mca_flags & MAF_NOREPORT)
1600 continue;
1601 spin_lock_bh(&pmc->mca_lock);
1602 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1603 type = MLD2_MODE_IS_EXCLUDE;
1604 else
1605 type = MLD2_MODE_IS_INCLUDE;
1606 skb = add_grec(skb, pmc, type, 0, 0);
1607 spin_unlock_bh(&pmc->mca_lock);
1608 }
1609 read_unlock_bh(&idev->lock);
1610 } else {
1611 spin_lock_bh(&pmc->mca_lock);
1612 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1613 type = MLD2_MODE_IS_EXCLUDE;
1614 else
1615 type = MLD2_MODE_IS_INCLUDE;
1616 skb = add_grec(skb, pmc, type, 0, 0);
1617 spin_unlock_bh(&pmc->mca_lock);
1618 }
1619 if (skb)
1620 mld_sendpack(skb);
1621}
1622
1623/*
1624 * remove zero-count source records from a source filter list
1625 */
1626static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1627{
1628 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1629
1630 psf_prev = NULL;
1631 for (psf=*ppsf; psf; psf = psf_next) {
1632 psf_next = psf->sf_next;
1633 if (psf->sf_crcount == 0) {
1634 if (psf_prev)
1635 psf_prev->sf_next = psf->sf_next;
1636 else
1637 *ppsf = psf->sf_next;
1638 kfree(psf);
1639 } else
1640 psf_prev = psf;
1641 }
1642}
1643
1644static void mld_send_cr(struct inet6_dev *idev)
1645{
1646 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1647 struct sk_buff *skb = NULL;
1648 int type, dtype;
1649
1650 read_lock_bh(&idev->lock);
Stephen Hemminger6457d262010-02-17 18:48:44 -08001651 spin_lock(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001652
1653 /* deleted MCA's */
1654 pmc_prev = NULL;
1655 for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) {
1656 pmc_next = pmc->next;
1657 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1658 type = MLD2_BLOCK_OLD_SOURCES;
1659 dtype = MLD2_BLOCK_OLD_SOURCES;
1660 skb = add_grec(skb, pmc, type, 1, 0);
1661 skb = add_grec(skb, pmc, dtype, 1, 1);
1662 }
1663 if (pmc->mca_crcount) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001664 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1665 type = MLD2_CHANGE_TO_INCLUDE;
1666 skb = add_grec(skb, pmc, type, 1, 0);
1667 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001668 pmc->mca_crcount--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001669 if (pmc->mca_crcount == 0) {
1670 mld_clear_zeros(&pmc->mca_tomb);
1671 mld_clear_zeros(&pmc->mca_sources);
1672 }
1673 }
1674 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1675 !pmc->mca_sources) {
1676 if (pmc_prev)
1677 pmc_prev->next = pmc_next;
1678 else
1679 idev->mc_tomb = pmc_next;
1680 in6_dev_put(pmc->idev);
1681 kfree(pmc);
1682 } else
1683 pmc_prev = pmc;
1684 }
Stephen Hemminger6457d262010-02-17 18:48:44 -08001685 spin_unlock(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686
1687 /* change recs */
1688 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1689 spin_lock_bh(&pmc->mca_lock);
1690 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1691 type = MLD2_BLOCK_OLD_SOURCES;
1692 dtype = MLD2_ALLOW_NEW_SOURCES;
1693 } else {
1694 type = MLD2_ALLOW_NEW_SOURCES;
1695 dtype = MLD2_BLOCK_OLD_SOURCES;
1696 }
1697 skb = add_grec(skb, pmc, type, 0, 0);
1698 skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */
1699
1700 /* filter mode changes */
1701 if (pmc->mca_crcount) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001702 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1703 type = MLD2_CHANGE_TO_EXCLUDE;
1704 else
1705 type = MLD2_CHANGE_TO_INCLUDE;
1706 skb = add_grec(skb, pmc, type, 0, 0);
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001707 pmc->mca_crcount--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708 }
1709 spin_unlock_bh(&pmc->mca_lock);
1710 }
1711 read_unlock_bh(&idev->lock);
1712 if (!skb)
1713 return;
1714 (void) mld_sendpack(skb);
1715}
1716
1717static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1718{
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001719 struct net *net = dev_net(dev);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08001720 struct sock *sk = net->ipv6.igmp_sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721 struct inet6_dev *idev;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001722 struct sk_buff *skb;
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001723 struct mld_msg *hdr;
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09001724 const struct in6_addr *snd_addr, *saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725 struct in6_addr addr_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726 int err, len, payload_len, full_len;
1727 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1728 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1729 IPV6_TLV_PADN, 0 };
David S. Miller4c9483b2011-03-12 16:22:43 -05001730 struct flowi6 fl6;
Eric Dumazetadf30902009-06-02 05:19:30 +00001731 struct dst_entry *dst;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001732
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +09001733 if (type == ICMPV6_MGM_REDUCTION)
1734 snd_addr = &in6addr_linklocal_allrouters;
1735 else
1736 snd_addr = addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737
1738 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1739 payload_len = len + sizeof(ra);
1740 full_len = sizeof(struct ipv6hdr) + payload_len;
1741
Neil Hormanedf391f2009-04-27 02:45:02 -07001742 rcu_read_lock();
1743 IP6_UPD_PO_STATS(net, __in6_dev_get(dev),
1744 IPSTATS_MIB_OUT, full_len);
1745 rcu_read_unlock();
1746
Johannes Bergf5184d22008-05-12 20:48:31 -07001747 skb = sock_alloc_send_skb(sk, LL_ALLOCATED_SPACE(dev) + full_len, 1, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001748
1749 if (skb == NULL) {
YOSHIFUJI Hideakia11d2062006-11-04 20:11:37 +09001750 rcu_read_lock();
Denis V. Lunev3bd653c2008-10-08 10:54:51 -07001751 IP6_INC_STATS(net, __in6_dev_get(dev),
YOSHIFUJI Hideakia11d2062006-11-04 20:11:37 +09001752 IPSTATS_MIB_OUTDISCARDS);
1753 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 return;
1755 }
1756
1757 skb_reserve(skb, LL_RESERVED_SPACE(dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001758
Neil Horman95c385b2007-04-25 17:08:10 -07001759 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001760 /* <draft-ietf-magma-mld-source-05.txt>:
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001761 * use unspecified address as the source address
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762 * when a valid link-local address is not available.
1763 */
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09001764 saddr = &in6addr_any;
1765 } else
1766 saddr = &addr_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09001768 ip6_nd_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769
1770 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1771
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001772 hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg));
1773 memset(hdr, 0, sizeof(struct mld_msg));
1774 hdr->mld_type = type;
1775 ipv6_addr_copy(&hdr->mld_mca, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001777 hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len,
1778 IPPROTO_ICMPV6,
1779 csum_partial(hdr, len, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001780
Eric Dumazet96b52e62010-06-07 21:05:02 +00001781 rcu_read_lock();
1782 idev = __in6_dev_get(skb->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001783
Eric Dumazetadf30902009-06-02 05:19:30 +00001784 dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
1785 if (!dst) {
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001786 err = -ENOMEM;
1787 goto err_out;
1788 }
1789
David S. Miller4c9483b2011-03-12 16:22:43 -05001790 icmpv6_flow_init(sk, &fl6, type,
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001791 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1792 skb->dev->ifindex);
1793
David S. Miller4c9483b2011-03-12 16:22:43 -05001794 dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), NULL, 0);
David S. Miller452edd52011-03-02 13:27:41 -08001795 if (IS_ERR(dst)) {
1796 err = PTR_ERR(dst);
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001797 goto err_out;
David S. Miller452edd52011-03-02 13:27:41 -08001798 }
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001799
Eric Dumazetadf30902009-06-02 05:19:30 +00001800 skb_dst_set(skb, dst);
Jan Engelhardtb2e0b382010-03-23 04:09:07 +01001801 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001802 dst_output);
1803out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001804 if (!err) {
Denis V. Lunev5c5d2442008-10-08 10:33:50 -07001805 ICMP6MSGOUT_INC_STATS(net, idev, type);
Denis V. Luneva862f6a2008-10-08 10:33:06 -07001806 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
Neil Hormanedf391f2009-04-27 02:45:02 -07001807 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001808 } else
Denis V. Lunev3bd653c2008-10-08 10:54:51 -07001809 IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810
Eric Dumazet96b52e62010-06-07 21:05:02 +00001811 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812 return;
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001813
1814err_out:
1815 kfree_skb(skb);
1816 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001817}
1818
1819static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001820 const struct in6_addr *psfsrc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001821{
1822 struct ip6_sf_list *psf, *psf_prev;
1823 int rv = 0;
1824
1825 psf_prev = NULL;
1826 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1827 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1828 break;
1829 psf_prev = psf;
1830 }
1831 if (!psf || psf->sf_count[sfmode] == 0) {
1832 /* source filter not found, or count wrong => bug */
1833 return -ESRCH;
1834 }
1835 psf->sf_count[sfmode]--;
1836 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
1837 struct inet6_dev *idev = pmc->idev;
1838
1839 /* no more filters for this source */
1840 if (psf_prev)
1841 psf_prev->sf_next = psf->sf_next;
1842 else
1843 pmc->mca_sources = psf->sf_next;
1844 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
1845 !MLD_V1_SEEN(idev)) {
1846 psf->sf_crcount = idev->mc_qrv;
1847 psf->sf_next = pmc->mca_tomb;
1848 pmc->mca_tomb = psf;
1849 rv = 1;
1850 } else
1851 kfree(psf);
1852 }
1853 return rv;
1854}
1855
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001856static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
1857 int sfmode, int sfcount, const struct in6_addr *psfsrc,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858 int delta)
1859{
1860 struct ifmcaddr6 *pmc;
1861 int changerec = 0;
1862 int i, err;
1863
1864 if (!idev)
1865 return -ENODEV;
1866 read_lock_bh(&idev->lock);
1867 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
1868 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
1869 break;
1870 }
1871 if (!pmc) {
1872 /* MCA not found?? bug */
1873 read_unlock_bh(&idev->lock);
1874 return -ESRCH;
1875 }
1876 spin_lock_bh(&pmc->mca_lock);
1877 sf_markstate(pmc);
1878 if (!delta) {
1879 if (!pmc->mca_sfcount[sfmode]) {
1880 spin_unlock_bh(&pmc->mca_lock);
1881 read_unlock_bh(&idev->lock);
1882 return -EINVAL;
1883 }
1884 pmc->mca_sfcount[sfmode]--;
1885 }
1886 err = 0;
1887 for (i=0; i<sfcount; i++) {
1888 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
1889
1890 changerec |= rv > 0;
1891 if (!err && rv < 0)
1892 err = rv;
1893 }
1894 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
1895 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
1896 pmc->mca_sfcount[MCAST_INCLUDE]) {
1897 struct ip6_sf_list *psf;
1898
1899 /* filter mode change */
1900 pmc->mca_sfmode = MCAST_INCLUDE;
1901 pmc->mca_crcount = idev->mc_qrv;
1902 idev->mc_ifc_count = pmc->mca_crcount;
1903 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
1904 psf->sf_crcount = 0;
1905 mld_ifc_event(pmc->idev);
1906 } else if (sf_setstate(pmc) || changerec)
1907 mld_ifc_event(pmc->idev);
1908 spin_unlock_bh(&pmc->mca_lock);
1909 read_unlock_bh(&idev->lock);
1910 return err;
1911}
1912
1913/*
1914 * Add multicast single-source filter to the interface list
1915 */
1916static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001917 const struct in6_addr *psfsrc, int delta)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918{
1919 struct ip6_sf_list *psf, *psf_prev;
1920
1921 psf_prev = NULL;
1922 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1923 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
1924 break;
1925 psf_prev = psf;
1926 }
1927 if (!psf) {
Ingo Oeser0c600ed2006-03-20 23:01:32 -08001928 psf = kzalloc(sizeof(*psf), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929 if (!psf)
1930 return -ENOBUFS;
Ingo Oeser0c600ed2006-03-20 23:01:32 -08001931
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932 psf->sf_addr = *psfsrc;
1933 if (psf_prev) {
1934 psf_prev->sf_next = psf;
1935 } else
1936 pmc->mca_sources = psf;
1937 }
1938 psf->sf_count[sfmode]++;
1939 return 0;
1940}
1941
1942static void sf_markstate(struct ifmcaddr6 *pmc)
1943{
1944 struct ip6_sf_list *psf;
1945 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1946
1947 for (psf=pmc->mca_sources; psf; psf=psf->sf_next)
1948 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1949 psf->sf_oldin = mca_xcount ==
1950 psf->sf_count[MCAST_EXCLUDE] &&
1951 !psf->sf_count[MCAST_INCLUDE];
1952 } else
1953 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
1954}
1955
1956static int sf_setstate(struct ifmcaddr6 *pmc)
1957{
David L Stevens7add2a42006-01-24 13:06:39 -08001958 struct ip6_sf_list *psf, *dpsf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001959 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
1960 int qrv = pmc->idev->mc_qrv;
1961 int new_in, rv;
1962
1963 rv = 0;
1964 for (psf=pmc->mca_sources; psf; psf=psf->sf_next) {
1965 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1966 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
1967 !psf->sf_count[MCAST_INCLUDE];
1968 } else
1969 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
David L Stevens7add2a42006-01-24 13:06:39 -08001970 if (new_in) {
1971 if (!psf->sf_oldin) {
Al Viroe80e28b2006-02-03 20:10:03 -05001972 struct ip6_sf_list *prev = NULL;
David L Stevens7add2a42006-01-24 13:06:39 -08001973
1974 for (dpsf=pmc->mca_tomb; dpsf;
1975 dpsf=dpsf->sf_next) {
1976 if (ipv6_addr_equal(&dpsf->sf_addr,
1977 &psf->sf_addr))
1978 break;
1979 prev = dpsf;
1980 }
1981 if (dpsf) {
1982 if (prev)
1983 prev->sf_next = dpsf->sf_next;
1984 else
1985 pmc->mca_tomb = dpsf->sf_next;
1986 kfree(dpsf);
1987 }
1988 psf->sf_crcount = qrv;
1989 rv++;
1990 }
1991 } else if (psf->sf_oldin) {
1992 psf->sf_crcount = 0;
1993 /*
1994 * add or update "delete" records if an active filter
1995 * is now inactive
1996 */
1997 for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next)
1998 if (ipv6_addr_equal(&dpsf->sf_addr,
1999 &psf->sf_addr))
2000 break;
2001 if (!dpsf) {
Joe Perches5d553542010-05-31 17:23:22 +00002002 dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC);
David L Stevens7add2a42006-01-24 13:06:39 -08002003 if (!dpsf)
2004 continue;
2005 *dpsf = *psf;
2006 /* pmc->mca_lock held by callers */
2007 dpsf->sf_next = pmc->mca_tomb;
2008 pmc->mca_tomb = dpsf;
2009 }
2010 dpsf->sf_crcount = qrv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002011 rv++;
2012 }
2013 }
2014 return rv;
2015}
2016
2017/*
2018 * Add multicast source filter list to the interface list
2019 */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002020static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
2021 int sfmode, int sfcount, const struct in6_addr *psfsrc,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002022 int delta)
2023{
2024 struct ifmcaddr6 *pmc;
2025 int isexclude;
2026 int i, err;
2027
2028 if (!idev)
2029 return -ENODEV;
2030 read_lock_bh(&idev->lock);
2031 for (pmc=idev->mc_list; pmc; pmc=pmc->next) {
2032 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2033 break;
2034 }
2035 if (!pmc) {
2036 /* MCA not found?? bug */
2037 read_unlock_bh(&idev->lock);
2038 return -ESRCH;
2039 }
2040 spin_lock_bh(&pmc->mca_lock);
2041
2042 sf_markstate(pmc);
2043 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
2044 if (!delta)
2045 pmc->mca_sfcount[sfmode]++;
2046 err = 0;
2047 for (i=0; i<sfcount; i++) {
2048 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta);
2049 if (err)
2050 break;
2051 }
2052 if (err) {
2053 int j;
2054
2055 if (!delta)
2056 pmc->mca_sfcount[sfmode]--;
2057 for (j=0; j<i; j++)
2058 (void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
2059 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060 struct ip6_sf_list *psf;
2061
2062 /* filter mode change */
2063 if (pmc->mca_sfcount[MCAST_EXCLUDE])
2064 pmc->mca_sfmode = MCAST_EXCLUDE;
2065 else if (pmc->mca_sfcount[MCAST_INCLUDE])
2066 pmc->mca_sfmode = MCAST_INCLUDE;
2067 /* else no filters; keep old mode for reports */
2068
2069 pmc->mca_crcount = idev->mc_qrv;
2070 idev->mc_ifc_count = pmc->mca_crcount;
2071 for (psf=pmc->mca_sources; psf; psf = psf->sf_next)
2072 psf->sf_crcount = 0;
2073 mld_ifc_event(idev);
2074 } else if (sf_setstate(pmc))
2075 mld_ifc_event(idev);
2076 spin_unlock_bh(&pmc->mca_lock);
2077 read_unlock_bh(&idev->lock);
2078 return err;
2079}
2080
2081static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
2082{
2083 struct ip6_sf_list *psf, *nextpsf;
2084
2085 for (psf=pmc->mca_tomb; psf; psf=nextpsf) {
2086 nextpsf = psf->sf_next;
2087 kfree(psf);
2088 }
2089 pmc->mca_tomb = NULL;
2090 for (psf=pmc->mca_sources; psf; psf=nextpsf) {
2091 nextpsf = psf->sf_next;
2092 kfree(psf);
2093 }
2094 pmc->mca_sources = NULL;
2095 pmc->mca_sfmode = MCAST_EXCLUDE;
Denis Lukianovde9daad2005-09-14 20:53:42 -07002096 pmc->mca_sfcount[MCAST_INCLUDE] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002097 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
2098}
2099
2100
2101static void igmp6_join_group(struct ifmcaddr6 *ma)
2102{
2103 unsigned long delay;
2104
2105 if (ma->mca_flags & MAF_NOREPORT)
2106 return;
2107
2108 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2109
2110 delay = net_random() % IGMP6_UNSOLICITED_IVAL;
2111
2112 spin_lock_bh(&ma->mca_lock);
2113 if (del_timer(&ma->mca_timer)) {
2114 atomic_dec(&ma->mca_refcnt);
2115 delay = ma->mca_timer.expires - jiffies;
2116 }
2117
2118 if (!mod_timer(&ma->mca_timer, jiffies + delay))
2119 atomic_inc(&ma->mca_refcnt);
2120 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
2121 spin_unlock_bh(&ma->mca_lock);
2122}
2123
2124static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
2125 struct inet6_dev *idev)
2126{
2127 int err;
2128
David L Stevens5ab4a6c2005-12-27 14:03:00 -08002129 /* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
2130 * so no other readers or writers of iml or its sflist
2131 */
Stephen Hemmingercfcabdc2007-10-09 01:59:42 -07002132 if (!iml->sflist) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133 /* any-source empty exclude case */
2134 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
2135 }
2136 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
2137 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
2138 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
2139 iml->sflist = NULL;
2140 return err;
2141}
2142
2143static void igmp6_leave_group(struct ifmcaddr6 *ma)
2144{
2145 if (MLD_V1_SEEN(ma->idev)) {
2146 if (ma->mca_flags & MAF_LAST_REPORTER)
2147 igmp6_send(&ma->mca_addr, ma->idev->dev,
2148 ICMPV6_MGM_REDUCTION);
2149 } else {
2150 mld_add_delrec(ma->idev, ma);
2151 mld_ifc_event(ma->idev);
2152 }
2153}
2154
2155static void mld_gq_timer_expire(unsigned long data)
2156{
2157 struct inet6_dev *idev = (struct inet6_dev *)data;
2158
2159 idev->mc_gq_running = 0;
2160 mld_send_report(idev, NULL);
2161 __in6_dev_put(idev);
2162}
2163
2164static void mld_ifc_timer_expire(unsigned long data)
2165{
2166 struct inet6_dev *idev = (struct inet6_dev *)data;
2167
2168 mld_send_cr(idev);
2169 if (idev->mc_ifc_count) {
2170 idev->mc_ifc_count--;
2171 if (idev->mc_ifc_count)
2172 mld_ifc_start_timer(idev, idev->mc_maxdelay);
2173 }
2174 __in6_dev_put(idev);
2175}
2176
2177static void mld_ifc_event(struct inet6_dev *idev)
2178{
2179 if (MLD_V1_SEEN(idev))
2180 return;
2181 idev->mc_ifc_count = idev->mc_qrv;
2182 mld_ifc_start_timer(idev, 1);
2183}
2184
2185
2186static void igmp6_timer_handler(unsigned long data)
2187{
2188 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
2189
2190 if (MLD_V1_SEEN(ma->idev))
2191 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2192 else
2193 mld_send_report(ma->idev, ma);
2194
2195 spin_lock(&ma->mca_lock);
2196 ma->mca_flags |= MAF_LAST_REPORTER;
2197 ma->mca_flags &= ~MAF_TIMER_RUNNING;
2198 spin_unlock(&ma->mca_lock);
2199 ma_put(ma);
2200}
2201
Moni Shoua75c78502009-09-15 02:37:40 -07002202/* Device changing type */
2203
2204void ipv6_mc_unmap(struct inet6_dev *idev)
2205{
2206 struct ifmcaddr6 *i;
2207
2208 /* Install multicast list, except for all-nodes (already installed) */
2209
2210 read_lock_bh(&idev->lock);
2211 for (i = idev->mc_list; i; i = i->next)
2212 igmp6_group_dropped(i);
2213 read_unlock_bh(&idev->lock);
2214}
2215
2216void ipv6_mc_remap(struct inet6_dev *idev)
2217{
2218 ipv6_mc_up(idev);
2219}
2220
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221/* Device going down */
2222
2223void ipv6_mc_down(struct inet6_dev *idev)
2224{
2225 struct ifmcaddr6 *i;
2226
2227 /* Withdraw multicast list */
2228
2229 read_lock_bh(&idev->lock);
2230 idev->mc_ifc_count = 0;
2231 if (del_timer(&idev->mc_ifc_timer))
2232 __in6_dev_put(idev);
2233 idev->mc_gq_running = 0;
2234 if (del_timer(&idev->mc_gq_timer))
2235 __in6_dev_put(idev);
2236
2237 for (i = idev->mc_list; i; i=i->next)
2238 igmp6_group_dropped(i);
2239 read_unlock_bh(&idev->lock);
2240
2241 mld_clear_delrec(idev);
2242}
2243
2244
2245/* Device going up */
2246
2247void ipv6_mc_up(struct inet6_dev *idev)
2248{
2249 struct ifmcaddr6 *i;
2250
2251 /* Install multicast list, except for all-nodes (already installed) */
2252
2253 read_lock_bh(&idev->lock);
2254 for (i = idev->mc_list; i; i=i->next)
2255 igmp6_group_added(i);
2256 read_unlock_bh(&idev->lock);
2257}
2258
2259/* IPv6 device initialization. */
2260
2261void ipv6_mc_init_dev(struct inet6_dev *idev)
2262{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002263 write_lock_bh(&idev->lock);
Stephen Hemminger6457d262010-02-17 18:48:44 -08002264 spin_lock_init(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002265 idev->mc_gq_running = 0;
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -08002266 setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire,
2267 (unsigned long)idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002268 idev->mc_tomb = NULL;
2269 idev->mc_ifc_count = 0;
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -08002270 setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire,
2271 (unsigned long)idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002272 idev->mc_qrv = MLD_QRV_DEFAULT;
2273 idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL;
2274 idev->mc_v1_seen = 0;
2275 write_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002276}
2277
2278/*
2279 * Device is about to be destroyed: clean up.
2280 */
2281
2282void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2283{
2284 struct ifmcaddr6 *i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002285
2286 /* Deactivate timers */
2287 ipv6_mc_down(idev);
2288
2289 /* Delete all-nodes address. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002290 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2291 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2292 * fail.
2293 */
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +09002294 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +09002296 if (idev->cnf.forwarding)
2297 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002298
2299 write_lock_bh(&idev->lock);
2300 while ((i = idev->mc_list) != NULL) {
2301 idev->mc_list = i->next;
2302 write_unlock_bh(&idev->lock);
2303
2304 igmp6_group_dropped(i);
2305 ma_put(i);
2306
2307 write_lock_bh(&idev->lock);
2308 }
2309 write_unlock_bh(&idev->lock);
2310}
2311
2312#ifdef CONFIG_PROC_FS
2313struct igmp6_mc_iter_state {
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002314 struct seq_net_private p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002315 struct net_device *dev;
2316 struct inet6_dev *idev;
2317};
2318
2319#define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2320
2321static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
2322{
2323 struct ifmcaddr6 *im = NULL;
2324 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09002325 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326
Pavel Emelianov7562f872007-05-03 15:13:45 -07002327 state->idev = NULL;
Eric Dumazetce81b762009-11-11 17:34:30 +00002328 for_each_netdev_rcu(net, state->dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002329 struct inet6_dev *idev;
Eric Dumazetce81b762009-11-11 17:34:30 +00002330 idev = __in6_dev_get(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002331 if (!idev)
2332 continue;
2333 read_lock_bh(&idev->lock);
2334 im = idev->mc_list;
2335 if (im) {
2336 state->idev = idev;
2337 break;
2338 }
2339 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002340 }
2341 return im;
2342}
2343
2344static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
2345{
2346 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2347
2348 im = im->next;
2349 while (!im) {
Eric Dumazetce81b762009-11-11 17:34:30 +00002350 if (likely(state->idev != NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002351 read_unlock_bh(&state->idev->lock);
Eric Dumazetce81b762009-11-11 17:34:30 +00002352
2353 state->dev = next_net_device_rcu(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002354 if (!state->dev) {
2355 state->idev = NULL;
2356 break;
2357 }
Eric Dumazetce81b762009-11-11 17:34:30 +00002358 state->idev = __in6_dev_get(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002359 if (!state->idev)
2360 continue;
2361 read_lock_bh(&state->idev->lock);
2362 im = state->idev->mc_list;
2363 }
2364 return im;
2365}
2366
2367static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2368{
2369 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2370 if (im)
2371 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2372 --pos;
2373 return pos ? NULL : im;
2374}
2375
2376static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazetce81b762009-11-11 17:34:30 +00002377 __acquires(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002378{
Eric Dumazetce81b762009-11-11 17:34:30 +00002379 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002380 return igmp6_mc_get_idx(seq, *pos);
2381}
2382
2383static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2384{
Eric Dumazetce81b762009-11-11 17:34:30 +00002385 struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v);
2386
Linus Torvalds1da177e2005-04-16 15:20:36 -07002387 ++*pos;
2388 return im;
2389}
2390
2391static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
Eric Dumazetce81b762009-11-11 17:34:30 +00002392 __releases(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002393{
2394 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
Eric Dumazetce81b762009-11-11 17:34:30 +00002395
Linus Torvalds1da177e2005-04-16 15:20:36 -07002396 if (likely(state->idev != NULL)) {
2397 read_unlock_bh(&state->idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002398 state->idev = NULL;
2399 }
2400 state->dev = NULL;
Eric Dumazetce81b762009-11-11 17:34:30 +00002401 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002402}
2403
2404static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
2405{
2406 struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
2407 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2408
2409 seq_printf(seq,
Harvey Harrison4b7a4272008-10-29 12:50:24 -07002410 "%-4d %-15s %pi6 %5d %08X %ld\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002411 state->dev->ifindex, state->dev->name,
Harvey Harrisonb0711952008-10-28 16:05:40 -07002412 &im->mca_addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002413 im->mca_users, im->mca_flags,
2414 (im->mca_flags&MAF_TIMER_RUNNING) ?
2415 jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
2416 return 0;
2417}
2418
Philippe De Muyter56b3d972007-07-10 23:07:31 -07002419static const struct seq_operations igmp6_mc_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002420 .start = igmp6_mc_seq_start,
2421 .next = igmp6_mc_seq_next,
2422 .stop = igmp6_mc_seq_stop,
2423 .show = igmp6_mc_seq_show,
2424};
2425
2426static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
2427{
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002428 return seq_open_net(inode, file, &igmp6_mc_seq_ops,
2429 sizeof(struct igmp6_mc_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002430}
2431
Arjan van de Ven9a321442007-02-12 00:55:35 -08002432static const struct file_operations igmp6_mc_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002433 .owner = THIS_MODULE,
2434 .open = igmp6_mc_seq_open,
2435 .read = seq_read,
2436 .llseek = seq_lseek,
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002437 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002438};
2439
2440struct igmp6_mcf_iter_state {
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002441 struct seq_net_private p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002442 struct net_device *dev;
2443 struct inet6_dev *idev;
2444 struct ifmcaddr6 *im;
2445};
2446
2447#define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2448
2449static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
2450{
2451 struct ip6_sf_list *psf = NULL;
2452 struct ifmcaddr6 *im = NULL;
2453 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09002454 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002455
Pavel Emelianov7562f872007-05-03 15:13:45 -07002456 state->idev = NULL;
2457 state->im = NULL;
Eric Dumazetce81b762009-11-11 17:34:30 +00002458 for_each_netdev_rcu(net, state->dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002459 struct inet6_dev *idev;
Eric Dumazetce81b762009-11-11 17:34:30 +00002460 idev = __in6_dev_get(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002461 if (unlikely(idev == NULL))
2462 continue;
2463 read_lock_bh(&idev->lock);
2464 im = idev->mc_list;
2465 if (likely(im != NULL)) {
2466 spin_lock_bh(&im->mca_lock);
2467 psf = im->mca_sources;
2468 if (likely(psf != NULL)) {
2469 state->im = im;
2470 state->idev = idev;
2471 break;
2472 }
2473 spin_unlock_bh(&im->mca_lock);
2474 }
2475 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002476 }
2477 return psf;
2478}
2479
2480static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
2481{
2482 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2483
2484 psf = psf->sf_next;
2485 while (!psf) {
2486 spin_unlock_bh(&state->im->mca_lock);
2487 state->im = state->im->next;
2488 while (!state->im) {
Eric Dumazetce81b762009-11-11 17:34:30 +00002489 if (likely(state->idev != NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002490 read_unlock_bh(&state->idev->lock);
Eric Dumazetce81b762009-11-11 17:34:30 +00002491
2492 state->dev = next_net_device_rcu(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002493 if (!state->dev) {
2494 state->idev = NULL;
2495 goto out;
2496 }
Eric Dumazetce81b762009-11-11 17:34:30 +00002497 state->idev = __in6_dev_get(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002498 if (!state->idev)
2499 continue;
2500 read_lock_bh(&state->idev->lock);
2501 state->im = state->idev->mc_list;
2502 }
2503 if (!state->im)
2504 break;
2505 spin_lock_bh(&state->im->mca_lock);
2506 psf = state->im->mca_sources;
2507 }
2508out:
2509 return psf;
2510}
2511
2512static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2513{
2514 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2515 if (psf)
2516 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2517 --pos;
2518 return pos ? NULL : psf;
2519}
2520
2521static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazetce81b762009-11-11 17:34:30 +00002522 __acquires(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002523{
Eric Dumazetce81b762009-11-11 17:34:30 +00002524 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002525 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2526}
2527
2528static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2529{
2530 struct ip6_sf_list *psf;
2531 if (v == SEQ_START_TOKEN)
2532 psf = igmp6_mcf_get_first(seq);
2533 else
2534 psf = igmp6_mcf_get_next(seq, v);
2535 ++*pos;
2536 return psf;
2537}
2538
2539static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
Eric Dumazetce81b762009-11-11 17:34:30 +00002540 __releases(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002541{
2542 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2543 if (likely(state->im != NULL)) {
2544 spin_unlock_bh(&state->im->mca_lock);
2545 state->im = NULL;
2546 }
2547 if (likely(state->idev != NULL)) {
2548 read_unlock_bh(&state->idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002549 state->idev = NULL;
2550 }
2551 state->dev = NULL;
Eric Dumazetce81b762009-11-11 17:34:30 +00002552 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002553}
2554
2555static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
2556{
2557 struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
2558 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2559
2560 if (v == SEQ_START_TOKEN) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002561 seq_printf(seq,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002562 "%3s %6s "
YOSHIFUJI Hideaki9343e792006-01-17 02:10:53 -08002563 "%32s %32s %6s %6s\n", "Idx",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002564 "Device", "Multicast Address",
2565 "Source Address", "INC", "EXC");
2566 } else {
2567 seq_printf(seq,
Harvey Harrison4b7a4272008-10-29 12:50:24 -07002568 "%3d %6.6s %pi6 %pi6 %6lu %6lu\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002569 state->dev->ifindex, state->dev->name,
Harvey Harrisonb0711952008-10-28 16:05:40 -07002570 &state->im->mca_addr,
2571 &psf->sf_addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002572 psf->sf_count[MCAST_INCLUDE],
2573 psf->sf_count[MCAST_EXCLUDE]);
2574 }
2575 return 0;
2576}
2577
Philippe De Muyter56b3d972007-07-10 23:07:31 -07002578static const struct seq_operations igmp6_mcf_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002579 .start = igmp6_mcf_seq_start,
2580 .next = igmp6_mcf_seq_next,
2581 .stop = igmp6_mcf_seq_stop,
2582 .show = igmp6_mcf_seq_show,
2583};
2584
2585static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
2586{
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002587 return seq_open_net(inode, file, &igmp6_mcf_seq_ops,
2588 sizeof(struct igmp6_mcf_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002589}
2590
Arjan van de Ven9a321442007-02-12 00:55:35 -08002591static const struct file_operations igmp6_mcf_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002592 .owner = THIS_MODULE,
2593 .open = igmp6_mcf_seq_open,
2594 .read = seq_read,
2595 .llseek = seq_lseek,
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002596 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002597};
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002598
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002599static int __net_init igmp6_proc_init(struct net *net)
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002600{
2601 int err;
2602
2603 err = -ENOMEM;
2604 if (!proc_net_fops_create(net, "igmp6", S_IRUGO, &igmp6_mc_seq_fops))
2605 goto out;
2606 if (!proc_net_fops_create(net, "mcfilter6", S_IRUGO,
2607 &igmp6_mcf_seq_fops))
2608 goto out_proc_net_igmp6;
2609
2610 err = 0;
2611out:
2612 return err;
2613
2614out_proc_net_igmp6:
2615 proc_net_remove(net, "igmp6");
2616 goto out;
2617}
2618
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002619static void __net_exit igmp6_proc_exit(struct net *net)
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002620{
2621 proc_net_remove(net, "mcfilter6");
2622 proc_net_remove(net, "igmp6");
2623}
2624#else
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002625static inline int igmp6_proc_init(struct net *net)
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002626{
2627 return 0;
2628}
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002629static inline void igmp6_proc_exit(struct net *net)
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002630{
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002631}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002632#endif
2633
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002634static int __net_init igmp6_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002635{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002636 int err;
2637
Denis V. Lunev1ed85162008-04-03 14:31:03 -07002638 err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6,
2639 SOCK_RAW, IPPROTO_ICMPV6, net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002640 if (err < 0) {
2641 printk(KERN_ERR
2642 "Failed to initialize the IGMP6 control socket (err %d).\n",
2643 err);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002644 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002645 }
2646
Denis V. Lunev1ed85162008-04-03 14:31:03 -07002647 inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002648
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002649 err = igmp6_proc_init(net);
2650 if (err)
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002651 goto out_sock_create;
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002652out:
2653 return err;
2654
2655out_sock_create:
Denis V. Lunev1ed85162008-04-03 14:31:03 -07002656 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002657 goto out;
2658}
2659
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002660static void __net_exit igmp6_net_exit(struct net *net)
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002661{
Denis V. Lunev1ed85162008-04-03 14:31:03 -07002662 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002663 igmp6_proc_exit(net);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002664}
2665
2666static struct pernet_operations igmp6_net_ops = {
2667 .init = igmp6_net_init,
2668 .exit = igmp6_net_exit,
2669};
2670
2671int __init igmp6_init(void)
2672{
2673 return register_pernet_subsys(&igmp6_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002674}
2675
2676void igmp6_cleanup(void)
2677{
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002678 unregister_pernet_subsys(&igmp6_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002679}