blob: 9648de2b67458201ad9435b6972b05191c88c075 [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>
Hannes Frederic Sowa9d4a0312013-07-26 17:05:16 +020047#include <linux/pkt_sched.h>
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +090048#include <net/mld.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
50#include <linux/netfilter.h>
51#include <linux/netfilter_ipv6.h>
52
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020053#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#include <net/sock.h>
55#include <net/snmp.h>
56
57#include <net/ipv6.h>
58#include <net/protocol.h>
59#include <net/if_inet6.h>
60#include <net/ndisc.h>
61#include <net/addrconf.h>
62#include <net/ip6_route.h>
Denis V. Lunev1ed85162008-04-03 14:31:03 -070063#include <net/inet_common.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65#include <net/ip6_checksum.h>
66
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +090067/* Ensure that we have struct in6_addr aligned on 32bit word. */
68static void *__mld2_query_bugs[] __attribute__((__unused__)) = {
69 BUILD_BUG_ON_NULL(offsetof(struct mld2_query, mld2q_srcs) % 4),
70 BUILD_BUG_ON_NULL(offsetof(struct mld2_report, mld2r_grec) % 4),
71 BUILD_BUG_ON_NULL(offsetof(struct mld2_grec, grec_mca) % 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072};
73
74static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
75
Linus Torvalds1da177e2005-04-16 15:20:36 -070076static void igmp6_join_group(struct ifmcaddr6 *ma);
77static void igmp6_leave_group(struct ifmcaddr6 *ma);
78static void igmp6_timer_handler(unsigned long data);
79
80static void mld_gq_timer_expire(unsigned long data);
81static void mld_ifc_timer_expire(unsigned long data);
82static void mld_ifc_event(struct inet6_dev *idev);
83static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc);
Eric Dumazetb71d1d42011-04-22 04:53:02 +000084static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085static void mld_clear_delrec(struct inet6_dev *idev);
Daniel Borkmann6c567b72013-09-04 00:19:38 +020086static bool mld_in_v1_mode(const struct inet6_dev *idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070087static int sf_setstate(struct ifmcaddr6 *pmc);
88static void sf_markstate(struct ifmcaddr6 *pmc);
89static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
Eric Dumazetb71d1d42011-04-22 04:53:02 +000090static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
91 int sfmode, int sfcount, const struct in6_addr *psfsrc,
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 int delta);
Eric Dumazetb71d1d42011-04-22 04:53:02 +000093static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
94 int sfmode, int sfcount, const struct in6_addr *psfsrc,
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 int delta);
96static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
97 struct inet6_dev *idev);
98
Linus Torvalds1da177e2005-04-16 15:20:36 -070099#define MLD_QRV_DEFAULT 2
Daniel Borkmann89225d12013-09-04 00:19:37 +0200100/* RFC3810, 9.2. Query Interval */
101#define MLD_QI_DEFAULT (125 * HZ)
102/* RFC3810, 9.3. Query Response Interval */
103#define MLD_QRI_DEFAULT (10 * HZ)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Daniel Borkmann9fd07842013-08-20 12:22:02 +0200105/* RFC3810, 8.1 Query Version Distinctions */
106#define MLD_V1_QUERY_LEN 24
107#define MLD_V2_QUERY_LEN_MIN 28
108
David L Stevens6f4353d2005-12-26 17:03:46 -0800109#define IPV6_MLD_MAX_MSF 64
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
Brian Haleyab32ea52006-09-22 14:15:41 -0700111int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF;
Hannes Frederic Sowa2f711932014-09-02 15:49:25 +0200112int sysctl_mld_qrv __read_mostly = MLD_QRV_DEFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113
114/*
115 * socket join on multicast group
116 */
117
Eric Dumazet456b61b2010-11-23 13:12:15 +0000118#define for_each_pmc_rcu(np, pmc) \
119 for (pmc = rcu_dereference(np->ipv6_mc_list); \
120 pmc != NULL; \
121 pmc = rcu_dereference(pmc->next))
122
Hannes Frederic Sowafc4eba52013-08-14 01:03:46 +0200123static int unsolicited_report_interval(struct inet6_dev *idev)
124{
125 int iv;
126
Daniel Borkmann6c567b72013-09-04 00:19:38 +0200127 if (mld_in_v1_mode(idev))
Hannes Frederic Sowafc4eba52013-08-14 01:03:46 +0200128 iv = idev->cnf.mldv1_unsolicited_report_interval;
129 else
130 iv = idev->cnf.mldv2_unsolicited_report_interval;
131
132 return iv > 0 ? iv : 1;
133}
134
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900135int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136{
137 struct net_device *dev = NULL;
138 struct ipv6_mc_socklist *mc_lst;
139 struct ipv6_pinfo *np = inet6_sk(sk);
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900140 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 int err;
142
143 if (!ipv6_addr_is_multicast(addr))
144 return -EINVAL;
145
Eric Dumazet456b61b2010-11-23 13:12:15 +0000146 rcu_read_lock();
147 for_each_pmc_rcu(np, mc_lst) {
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700148 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
149 ipv6_addr_equal(&mc_lst->addr, addr)) {
Eric Dumazet456b61b2010-11-23 13:12:15 +0000150 rcu_read_unlock();
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700151 return -EADDRINUSE;
152 }
153 }
Eric Dumazet456b61b2010-11-23 13:12:15 +0000154 rcu_read_unlock();
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700155
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
157
158 if (mc_lst == NULL)
159 return -ENOMEM;
160
161 mc_lst->next = NULL;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000162 mc_lst->addr = *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +0200164 rtnl_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 if (ifindex == 0) {
166 struct rt6_info *rt;
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -0800167 rt = rt6_lookup(net, addr, NULL, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 if (rt) {
David S. Millerd1918542011-12-28 20:19:20 -0500169 dev = rt->dst.dev;
Amerigo Wang94e187c2012-10-29 00:13:19 +0000170 ip6_rt_put(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 }
172 } else
WANG Cong414b6c92014-09-11 15:35:14 -0700173 dev = __dev_get_by_index(net, ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
175 if (dev == NULL) {
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +0200176 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
178 return -ENODEV;
179 }
180
181 mc_lst->ifindex = dev->ifindex;
182 mc_lst->sfmode = MCAST_EXCLUDE;
YOSHIFUJI Hideaki196433c2006-01-04 13:56:31 -0800183 rwlock_init(&mc_lst->sflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 mc_lst->sflist = NULL;
185
186 /*
187 * now add/increase the group membership on the device
188 */
189
190 err = ipv6_dev_mc_inc(dev, addr);
191
192 if (err) {
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +0200193 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 return err;
196 }
197
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 mc_lst->next = np->ipv6_mc_list;
Eric Dumazet456b61b2010-11-23 13:12:15 +0000199 rcu_assign_pointer(np->ipv6_mc_list, mc_lst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +0200201 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
203 return 0;
204}
205
206/*
207 * socket leave on multicast group
208 */
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900209int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210{
211 struct ipv6_pinfo *np = inet6_sk(sk);
Eric Dumazet456b61b2010-11-23 13:12:15 +0000212 struct ipv6_mc_socklist *mc_lst;
213 struct ipv6_mc_socklist __rcu **lnk;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900214 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
Li Weia858d642012-07-17 15:28:59 +0800216 if (!ipv6_addr_is_multicast(addr))
217 return -EINVAL;
218
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +0200219 rtnl_lock();
Eric Dumazet456b61b2010-11-23 13:12:15 +0000220 for (lnk = &np->ipv6_mc_list;
WANG Congb5350912014-09-11 15:35:13 -0700221 (mc_lst = rtnl_dereference(*lnk)) != NULL;
Eric Dumazet456b61b2010-11-23 13:12:15 +0000222 lnk = &mc_lst->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
224 ipv6_addr_equal(&mc_lst->addr, addr)) {
225 struct net_device *dev;
226
227 *lnk = mc_lst->next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
WANG Cong414b6c92014-09-11 15:35:14 -0700229 dev = __dev_get_by_index(net, mc_lst->ifindex);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -0800230 if (dev != NULL) {
Eric Dumazet96b52e62010-06-07 21:05:02 +0000231 struct inet6_dev *idev = __in6_dev_get(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
David L Stevensacd6e002006-08-17 16:27:39 -0700233 (void) ip6_mc_leave_src(sk, mc_lst, idev);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000234 if (idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
David L Stevensacd6e002006-08-17 16:27:39 -0700236 } else
237 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +0200238 rtnl_unlock();
239
Eric Dumazet456b61b2010-11-23 13:12:15 +0000240 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
Lai Jiangshane3cbf282011-03-18 12:00:50 +0800241 kfree_rcu(mc_lst, rcu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 return 0;
243 }
244 }
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +0200245 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
David L Stevens9951f032005-07-08 17:47:28 -0700247 return -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248}
249
Eric Dumazet96b52e62010-06-07 21:05:02 +0000250/* called with rcu_read_lock() */
251static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net,
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000252 const struct in6_addr *group,
Eric Dumazet96b52e62010-06-07 21:05:02 +0000253 int ifindex)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254{
255 struct net_device *dev = NULL;
256 struct inet6_dev *idev = NULL;
257
258 if (ifindex == 0) {
Eric Dumazet96b52e62010-06-07 21:05:02 +0000259 struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 if (rt) {
David S. Millerd1918542011-12-28 20:19:20 -0500262 dev = rt->dst.dev;
Amerigo Wang94e187c2012-10-29 00:13:19 +0000263 ip6_rt_put(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 }
265 } else
Eric Dumazet96b52e62010-06-07 21:05:02 +0000266 dev = dev_get_by_index_rcu(net, ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267
268 if (!dev)
Eric Dumazet96b52e62010-06-07 21:05:02 +0000269 return NULL;
270 idev = __in6_dev_get(dev);
Ilpo Järvinen448eb712008-12-14 23:15:21 -0800271 if (!idev)
Joe Perches8a22c992010-11-14 17:05:00 +0000272 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 read_lock_bh(&idev->lock);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000274 if (idev->dead) {
275 read_unlock_bh(&idev->lock);
276 return NULL;
277 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 return idev;
279}
280
281void ipv6_sock_mc_close(struct sock *sk)
282{
283 struct ipv6_pinfo *np = inet6_sk(sk);
284 struct ipv6_mc_socklist *mc_lst;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900285 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
Eric Dumazet0e1efe92012-12-05 09:18:10 +0000287 if (!rcu_access_pointer(np->ipv6_mc_list))
288 return;
289
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +0200290 rtnl_lock();
WANG Congb5350912014-09-11 15:35:13 -0700291 while ((mc_lst = rtnl_dereference(np->ipv6_mc_list)) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 struct net_device *dev;
293
294 np->ipv6_mc_list = mc_lst->next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295
WANG Cong414b6c92014-09-11 15:35:14 -0700296 dev = __dev_get_by_index(net, mc_lst->ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 if (dev) {
Eric Dumazet96b52e62010-06-07 21:05:02 +0000298 struct inet6_dev *idev = __in6_dev_get(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
David L Stevensacd6e002006-08-17 16:27:39 -0700300 (void) ip6_mc_leave_src(sk, mc_lst, idev);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000301 if (idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
David L Stevensacd6e002006-08-17 16:27:39 -0700303 } else
304 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305
Eric Dumazet456b61b2010-11-23 13:12:15 +0000306 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
Lai Jiangshane3cbf282011-03-18 12:00:50 +0800307 kfree_rcu(mc_lst, rcu);
Eric Dumazet456b61b2010-11-23 13:12:15 +0000308
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 }
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +0200310 rtnl_unlock();
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;
Ian Morris67ba4152014-08-24 21:53:10 +0100373 for (i = 0; i < psl->sl_count; i++) {
YOSHIFUJI Hideaki / 吉藤英明07c2fec2013-01-29 12:48:23 +0000374 rv = !ipv6_addr_equal(&psl->sl_addr[i], source);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 if (rv == 0)
376 break;
377 }
378 if (rv) /* source not found */
David L Stevens917f2f12005-07-08 17:45:16 -0700379 goto done; /* err = -EADDRNOTAVAIL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700381 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
382 if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
383 leavegroup = 1;
384 goto done;
385 }
386
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 /* update the interface filter */
388 ip6_mc_del_src(idev, group, omode, 1, source, 1);
389
Ian Morris67ba4152014-08-24 21:53:10 +0100390 for (j = i+1; j < psl->sl_count; j++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 psl->sl_addr[j-1] = psl->sl_addr[j];
392 psl->sl_count--;
393 err = 0;
394 goto done;
395 }
396 /* else, add a new source to the filter */
397
398 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
399 err = -ENOBUFS;
400 goto done;
401 }
402 if (!psl || psl->sl_count == psl->sl_max) {
403 struct ip6_sf_socklist *newpsl;
404 int count = IP6_SFBLOCK;
405
406 if (psl)
407 count += psl->sl_max;
Kris Katterjohn8b3a7002006-01-11 15:56:43 -0800408 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 if (!newpsl) {
410 err = -ENOBUFS;
411 goto done;
412 }
413 newpsl->sl_max = count;
414 newpsl->sl_count = count - IP6_SFBLOCK;
415 if (psl) {
Ian Morris67ba4152014-08-24 21:53:10 +0100416 for (i = 0; i < psl->sl_count; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 newpsl->sl_addr[i] = psl->sl_addr[i];
418 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
419 }
420 pmc->sflist = psl = newpsl;
421 }
422 rv = 1; /* > 0 for insert logic below if sl_count is 0 */
Ian Morris67ba4152014-08-24 21:53:10 +0100423 for (i = 0; i < psl->sl_count; i++) {
YOSHIFUJI Hideaki / 吉藤英明07c2fec2013-01-29 12:48:23 +0000424 rv = !ipv6_addr_equal(&psl->sl_addr[i], source);
Jean Sacren56db1c52013-02-03 21:34:10 +0000425 if (rv == 0) /* There is an error in the address. */
426 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 }
Ian Morris67ba4152014-08-24 21:53:10 +0100428 for (j = psl->sl_count-1; j >= i; j--)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 psl->sl_addr[j+1] = psl->sl_addr[j];
430 psl->sl_addr[i] = *source;
431 psl->sl_count++;
432 err = 0;
433 /* update the interface list */
434 ip6_mc_add_src(idev, group, omode, 1, source, 1);
435done:
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800436 if (pmclocked)
Eric Dumazet96b52e62010-06-07 21:05:02 +0000437 write_unlock(&pmc->sflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 read_unlock_bh(&idev->lock);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000439 rcu_read_unlock();
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700440 if (leavegroup)
441 return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 return err;
443}
444
445int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
446{
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000447 const struct in6_addr *group;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 struct ipv6_mc_socklist *pmc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 struct inet6_dev *idev;
450 struct ipv6_pinfo *inet6 = inet6_sk(sk);
451 struct ip6_sf_socklist *newpsl, *psl;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900452 struct net *net = sock_net(sk);
David L Stevens9951f032005-07-08 17:47:28 -0700453 int leavegroup = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 int i, err;
455
456 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
457
458 if (!ipv6_addr_is_multicast(group))
459 return -EINVAL;
460 if (gsf->gf_fmode != MCAST_INCLUDE &&
461 gsf->gf_fmode != MCAST_EXCLUDE)
462 return -EINVAL;
463
Eric Dumazet96b52e62010-06-07 21:05:02 +0000464 rcu_read_lock();
465 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466
Eric Dumazet96b52e62010-06-07 21:05:02 +0000467 if (!idev) {
468 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 return -ENODEV;
Eric Dumazet96b52e62010-06-07 21:05:02 +0000470 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471
David S. Miller9c059892005-07-08 21:44:39 -0700472 err = 0;
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800473
David L Stevens9951f032005-07-08 17:47:28 -0700474 if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
475 leavegroup = 1;
476 goto done;
477 }
478
Eric Dumazet456b61b2010-11-23 13:12:15 +0000479 for_each_pmc_rcu(inet6, pmc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 if (pmc->ifindex != gsf->gf_interface)
481 continue;
482 if (ipv6_addr_equal(&pmc->addr, group))
483 break;
484 }
David L Stevens917f2f12005-07-08 17:45:16 -0700485 if (!pmc) { /* must have a prior join */
486 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 goto done;
David L Stevens917f2f12005-07-08 17:45:16 -0700488 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 if (gsf->gf_numsrc) {
Kris Katterjohn8b3a7002006-01-11 15:56:43 -0800490 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
491 GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 if (!newpsl) {
493 err = -ENOBUFS;
494 goto done;
495 }
496 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
Ian Morris67ba4152014-08-24 21:53:10 +0100497 for (i = 0; i < newpsl->sl_count; ++i) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 struct sockaddr_in6 *psin6;
499
500 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
501 newpsl->sl_addr[i] = psin6->sin6_addr;
502 }
503 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
504 newpsl->sl_count, newpsl->sl_addr, 0);
505 if (err) {
506 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
507 goto done;
508 }
Yan Zheng8713dbf2005-10-28 08:02:08 +0800509 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 newpsl = NULL;
Yan Zheng8713dbf2005-10-28 08:02:08 +0800511 (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
512 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800513
Eric Dumazet96b52e62010-06-07 21:05:02 +0000514 write_lock(&pmc->sflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 psl = pmc->sflist;
516 if (psl) {
517 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
518 psl->sl_count, psl->sl_addr, 0);
519 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
520 } else
521 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
522 pmc->sflist = newpsl;
523 pmc->sfmode = gsf->gf_fmode;
Eric Dumazet96b52e62010-06-07 21:05:02 +0000524 write_unlock(&pmc->sflock);
David L Stevens917f2f12005-07-08 17:45:16 -0700525 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526done:
527 read_unlock_bh(&idev->lock);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000528 rcu_read_unlock();
David L Stevens9951f032005-07-08 17:47:28 -0700529 if (leavegroup)
530 err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 return err;
532}
533
534int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
535 struct group_filter __user *optval, int __user *optlen)
536{
537 int err, i, count, copycount;
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000538 const struct in6_addr *group;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 struct ipv6_mc_socklist *pmc;
540 struct inet6_dev *idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 struct ipv6_pinfo *inet6 = inet6_sk(sk);
542 struct ip6_sf_socklist *psl;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900543 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544
545 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
546
547 if (!ipv6_addr_is_multicast(group))
548 return -EINVAL;
549
Eric Dumazet96b52e62010-06-07 21:05:02 +0000550 rcu_read_lock();
551 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552
Eric Dumazet96b52e62010-06-07 21:05:02 +0000553 if (!idev) {
554 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 return -ENODEV;
Eric Dumazet96b52e62010-06-07 21:05:02 +0000556 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
558 err = -EADDRNOTAVAIL;
WANG Congf7ed9252014-09-11 15:35:15 -0700559 /* changes to the ipv6_mc_list require the socket lock and
560 * rtnl lock. We have the socket lock and rcu read lock,
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800561 * so reading the list is safe.
562 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563
Eric Dumazet456b61b2010-11-23 13:12:15 +0000564 for_each_pmc_rcu(inet6, pmc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 if (pmc->ifindex != gsf->gf_interface)
566 continue;
567 if (ipv6_addr_equal(group, &pmc->addr))
568 break;
569 }
570 if (!pmc) /* must have a prior join */
571 goto done;
572 gsf->gf_fmode = pmc->sfmode;
573 psl = pmc->sflist;
574 count = psl ? psl->sl_count : 0;
575 read_unlock_bh(&idev->lock);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000576 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577
578 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
579 gsf->gf_numsrc = count;
580 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
581 copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
582 return -EFAULT;
583 }
WANG Congf7ed9252014-09-11 15:35:15 -0700584 /* changes to psl require the socket lock, and a write lock
585 * on pmc->sflock. We have the socket lock so reading here is safe.
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800586 */
Ian Morris67ba4152014-08-24 21:53:10 +0100587 for (i = 0; i < copycount; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 struct sockaddr_in6 *psin6;
589 struct sockaddr_storage ss;
590
591 psin6 = (struct sockaddr_in6 *)&ss;
592 memset(&ss, 0, sizeof(ss));
593 psin6->sin6_family = AF_INET6;
594 psin6->sin6_addr = psl->sl_addr[i];
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900595 if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 return -EFAULT;
597 }
598 return 0;
599done:
600 read_unlock_bh(&idev->lock);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000601 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 return err;
603}
604
Eric Dumazeta50feda2012-05-18 18:57:34 +0000605bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
606 const struct in6_addr *src_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607{
608 struct ipv6_pinfo *np = inet6_sk(sk);
609 struct ipv6_mc_socklist *mc;
610 struct ip6_sf_socklist *psl;
Eric Dumazeta50feda2012-05-18 18:57:34 +0000611 bool rv = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612
Eric Dumazet456b61b2010-11-23 13:12:15 +0000613 rcu_read_lock();
614 for_each_pmc_rcu(np, mc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 if (ipv6_addr_equal(&mc->addr, mc_addr))
616 break;
617 }
618 if (!mc) {
Eric Dumazet456b61b2010-11-23 13:12:15 +0000619 rcu_read_unlock();
Eric Dumazeta50feda2012-05-18 18:57:34 +0000620 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800622 read_lock(&mc->sflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 psl = mc->sflist;
624 if (!psl) {
625 rv = mc->sfmode == MCAST_EXCLUDE;
626 } else {
627 int i;
628
Ian Morris67ba4152014-08-24 21:53:10 +0100629 for (i = 0; i < psl->sl_count; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
631 break;
632 }
633 if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
Eric Dumazeta50feda2012-05-18 18:57:34 +0000634 rv = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
Eric Dumazeta50feda2012-05-18 18:57:34 +0000636 rv = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800638 read_unlock(&mc->sflock);
Eric Dumazet456b61b2010-11-23 13:12:15 +0000639 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640
641 return rv;
642}
643
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644static void igmp6_group_added(struct ifmcaddr6 *mc)
645{
646 struct net_device *dev = mc->idev->dev;
647 char buf[MAX_ADDR_LEN];
648
YOSHIFUJI Hideaki / 吉藤英明ec16ef22013-02-09 04:29:58 +0000649 if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) <
650 IPV6_ADDR_SCOPE_LINKLOCAL)
651 return;
652
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 spin_lock_bh(&mc->mca_lock);
654 if (!(mc->mca_flags&MAF_LOADED)) {
655 mc->mca_flags |= MAF_LOADED;
656 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
Jiri Pirko22bedad32010-04-01 21:22:57 +0000657 dev_mc_add(dev, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 }
659 spin_unlock_bh(&mc->mca_lock);
660
661 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
662 return;
663
Daniel Borkmann6c567b72013-09-04 00:19:38 +0200664 if (mld_in_v1_mode(mc->idev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 igmp6_join_group(mc);
666 return;
667 }
668 /* else v2 */
669
670 mc->mca_crcount = mc->idev->mc_qrv;
671 mld_ifc_event(mc->idev);
672}
673
674static void igmp6_group_dropped(struct ifmcaddr6 *mc)
675{
676 struct net_device *dev = mc->idev->dev;
677 char buf[MAX_ADDR_LEN];
678
YOSHIFUJI Hideaki / 吉藤英明ec16ef22013-02-09 04:29:58 +0000679 if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) <
680 IPV6_ADDR_SCOPE_LINKLOCAL)
681 return;
682
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 spin_lock_bh(&mc->mca_lock);
684 if (mc->mca_flags&MAF_LOADED) {
685 mc->mca_flags &= ~MAF_LOADED;
686 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
Jiri Pirko22bedad32010-04-01 21:22:57 +0000687 dev_mc_del(dev, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 }
689
690 if (mc->mca_flags & MAF_NOREPORT)
691 goto done;
692 spin_unlock_bh(&mc->mca_lock);
693
694 if (!mc->idev->dead)
695 igmp6_leave_group(mc);
696
697 spin_lock_bh(&mc->mca_lock);
698 if (del_timer(&mc->mca_timer))
699 atomic_dec(&mc->mca_refcnt);
700done:
701 ip6_mc_clear_src(mc);
702 spin_unlock_bh(&mc->mca_lock);
703}
704
705/*
706 * deleted ifmcaddr6 manipulation
707 */
708static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
709{
710 struct ifmcaddr6 *pmc;
711
712 /* this is an "ifmcaddr6" for convenience; only the fields below
713 * are actually used. In particular, the refcnt and users are not
714 * used for management of the delete list. Using the same structure
715 * for deleted items allows change reports to use common code with
716 * non-deleted or query-response MCA's.
717 */
Ingo Oeser0c600ed2006-03-20 23:01:32 -0800718 pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 if (!pmc)
720 return;
Ingo Oeser0c600ed2006-03-20 23:01:32 -0800721
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 spin_lock_bh(&im->mca_lock);
723 spin_lock_init(&pmc->mca_lock);
724 pmc->idev = im->idev;
725 in6_dev_hold(idev);
726 pmc->mca_addr = im->mca_addr;
727 pmc->mca_crcount = idev->mc_qrv;
728 pmc->mca_sfmode = im->mca_sfmode;
729 if (pmc->mca_sfmode == MCAST_INCLUDE) {
730 struct ip6_sf_list *psf;
731
732 pmc->mca_tomb = im->mca_tomb;
733 pmc->mca_sources = im->mca_sources;
734 im->mca_tomb = im->mca_sources = NULL;
Ian Morris67ba4152014-08-24 21:53:10 +0100735 for (psf = pmc->mca_sources; psf; psf = psf->sf_next)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 psf->sf_crcount = pmc->mca_crcount;
737 }
738 spin_unlock_bh(&im->mca_lock);
739
Stephen Hemminger6457d262010-02-17 18:48:44 -0800740 spin_lock_bh(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 pmc->next = idev->mc_tomb;
742 idev->mc_tomb = pmc;
Stephen Hemminger6457d262010-02-17 18:48:44 -0800743 spin_unlock_bh(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744}
745
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000746static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *pmca)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747{
748 struct ifmcaddr6 *pmc, *pmc_prev;
749 struct ip6_sf_list *psf, *psf_next;
750
Stephen Hemminger6457d262010-02-17 18:48:44 -0800751 spin_lock_bh(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 pmc_prev = NULL;
Ian Morris67ba4152014-08-24 21:53:10 +0100753 for (pmc = idev->mc_tomb; pmc; pmc = pmc->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 if (ipv6_addr_equal(&pmc->mca_addr, pmca))
755 break;
756 pmc_prev = pmc;
757 }
758 if (pmc) {
759 if (pmc_prev)
760 pmc_prev->next = pmc->next;
761 else
762 idev->mc_tomb = pmc->next;
763 }
Stephen Hemminger6457d262010-02-17 18:48:44 -0800764 spin_unlock_bh(&idev->mc_lock);
765
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 if (pmc) {
Ian Morris67ba4152014-08-24 21:53:10 +0100767 for (psf = pmc->mca_tomb; psf; psf = psf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 psf_next = psf->sf_next;
769 kfree(psf);
770 }
771 in6_dev_put(pmc->idev);
772 kfree(pmc);
773 }
774}
775
776static void mld_clear_delrec(struct inet6_dev *idev)
777{
778 struct ifmcaddr6 *pmc, *nextpmc;
779
Stephen Hemminger6457d262010-02-17 18:48:44 -0800780 spin_lock_bh(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 pmc = idev->mc_tomb;
782 idev->mc_tomb = NULL;
Stephen Hemminger6457d262010-02-17 18:48:44 -0800783 spin_unlock_bh(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784
785 for (; pmc; pmc = nextpmc) {
786 nextpmc = pmc->next;
787 ip6_mc_clear_src(pmc);
788 in6_dev_put(pmc->idev);
789 kfree(pmc);
790 }
791
792 /* clear dead sources, too */
793 read_lock_bh(&idev->lock);
Ian Morris67ba4152014-08-24 21:53:10 +0100794 for (pmc = idev->mc_list; pmc; pmc = pmc->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 struct ip6_sf_list *psf, *psf_next;
796
797 spin_lock_bh(&pmc->mca_lock);
798 psf = pmc->mca_tomb;
799 pmc->mca_tomb = NULL;
800 spin_unlock_bh(&pmc->mca_lock);
Ian Morris67ba4152014-08-24 21:53:10 +0100801 for (; psf; psf = psf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 psf_next = psf->sf_next;
803 kfree(psf);
804 }
805 }
806 read_unlock_bh(&idev->lock);
807}
808
WANG Cong1691c632014-09-11 15:35:16 -0700809static void mca_get(struct ifmcaddr6 *mc)
810{
811 atomic_inc(&mc->mca_refcnt);
812}
813
814static void ma_put(struct ifmcaddr6 *mc)
815{
816 if (atomic_dec_and_test(&mc->mca_refcnt)) {
817 in6_dev_put(mc->idev);
818 kfree(mc);
819 }
820}
821
822static struct ifmcaddr6 *mca_alloc(struct inet6_dev *idev,
823 const struct in6_addr *addr)
824{
825 struct ifmcaddr6 *mc;
826
827 mc = kzalloc(sizeof(*mc), GFP_ATOMIC);
828 if (mc == NULL)
829 return NULL;
830
831 setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc);
832
833 mc->mca_addr = *addr;
834 mc->idev = idev; /* reference taken by caller */
835 mc->mca_users = 1;
836 /* mca_stamp should be updated upon changes */
837 mc->mca_cstamp = mc->mca_tstamp = jiffies;
838 atomic_set(&mc->mca_refcnt, 1);
839 spin_lock_init(&mc->mca_lock);
840
841 /* initial mode is (EX, empty) */
842 mc->mca_sfmode = MCAST_EXCLUDE;
843 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
844
845 if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
846 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
847 mc->mca_flags |= MAF_NOREPORT;
848
849 return mc;
850}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851
852/*
853 * device multicast group inc (add if not found)
854 */
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900855int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856{
857 struct ifmcaddr6 *mc;
858 struct inet6_dev *idev;
859
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +0200860 ASSERT_RTNL();
861
Eric Dumazet96b52e62010-06-07 21:05:02 +0000862 /* we need to take a reference on idev */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 idev = in6_dev_get(dev);
864
865 if (idev == NULL)
866 return -EINVAL;
867
868 write_lock_bh(&idev->lock);
869 if (idev->dead) {
870 write_unlock_bh(&idev->lock);
871 in6_dev_put(idev);
872 return -ENODEV;
873 }
874
875 for (mc = idev->mc_list; mc; mc = mc->next) {
876 if (ipv6_addr_equal(&mc->mca_addr, addr)) {
877 mc->mca_users++;
878 write_unlock_bh(&idev->lock);
879 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
880 NULL, 0);
881 in6_dev_put(idev);
882 return 0;
883 }
884 }
885
WANG Cong1691c632014-09-11 15:35:16 -0700886 mc = mca_alloc(idev, addr);
887 if (!mc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 write_unlock_bh(&idev->lock);
889 in6_dev_put(idev);
890 return -ENOMEM;
891 }
892
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893 mc->next = idev->mc_list;
894 idev->mc_list = mc;
WANG Cong1691c632014-09-11 15:35:16 -0700895
896 /* Hold this for the code below before we unlock,
897 * it is already exposed via idev->mc_list.
898 */
899 mca_get(mc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 write_unlock_bh(&idev->lock);
901
902 mld_del_delrec(idev, &mc->mca_addr);
903 igmp6_group_added(mc);
904 ma_put(mc);
905 return 0;
906}
907
908/*
909 * device multicast group del
910 */
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900911int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912{
913 struct ifmcaddr6 *ma, **map;
914
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +0200915 ASSERT_RTNL();
916
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 write_lock_bh(&idev->lock);
Ian Morris67ba4152014-08-24 21:53:10 +0100918 for (map = &idev->mc_list; (ma = *map) != NULL; map = &ma->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 if (ipv6_addr_equal(&ma->mca_addr, addr)) {
920 if (--ma->mca_users == 0) {
921 *map = ma->next;
922 write_unlock_bh(&idev->lock);
923
924 igmp6_group_dropped(ma);
925
926 ma_put(ma);
927 return 0;
928 }
929 write_unlock_bh(&idev->lock);
930 return 0;
931 }
932 }
933 write_unlock_bh(&idev->lock);
934
935 return -ENOENT;
936}
937
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900938int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939{
Eric Dumazet96b52e62010-06-07 21:05:02 +0000940 struct inet6_dev *idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 int err;
942
WANG Cong414b6c92014-09-11 15:35:14 -0700943 ASSERT_RTNL();
Eric Dumazet96b52e62010-06-07 21:05:02 +0000944
945 idev = __in6_dev_get(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 if (!idev)
Eric Dumazet96b52e62010-06-07 21:05:02 +0000947 err = -ENODEV;
948 else
949 err = __ipv6_dev_mc_dec(idev, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 return err;
952}
953
954/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 * check if the interface/address pair is valid
956 */
Eric Dumazeta50feda2012-05-18 18:57:34 +0000957bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
958 const struct in6_addr *src_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959{
960 struct inet6_dev *idev;
961 struct ifmcaddr6 *mc;
Eric Dumazeta50feda2012-05-18 18:57:34 +0000962 bool rv = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963
Eric Dumazet96b52e62010-06-07 21:05:02 +0000964 rcu_read_lock();
965 idev = __in6_dev_get(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 if (idev) {
967 read_lock_bh(&idev->lock);
Ian Morris67ba4152014-08-24 21:53:10 +0100968 for (mc = idev->mc_list; mc; mc = mc->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969 if (ipv6_addr_equal(&mc->mca_addr, group))
970 break;
971 }
972 if (mc) {
973 if (src_addr && !ipv6_addr_any(src_addr)) {
974 struct ip6_sf_list *psf;
975
976 spin_lock_bh(&mc->mca_lock);
Ian Morris67ba4152014-08-24 21:53:10 +0100977 for (psf = mc->mca_sources; psf; psf = psf->sf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 if (ipv6_addr_equal(&psf->sf_addr, src_addr))
979 break;
980 }
981 if (psf)
982 rv = psf->sf_count[MCAST_INCLUDE] ||
983 psf->sf_count[MCAST_EXCLUDE] !=
984 mc->mca_sfcount[MCAST_EXCLUDE];
985 else
Ian Morris67ba4152014-08-24 21:53:10 +0100986 rv = mc->mca_sfcount[MCAST_EXCLUDE] != 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 spin_unlock_bh(&mc->mca_lock);
988 } else
Eric Dumazeta50feda2012-05-18 18:57:34 +0000989 rv = true; /* don't filter unspecified source */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990 }
991 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 }
Eric Dumazet96b52e62010-06-07 21:05:02 +0000993 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 return rv;
995}
996
997static void mld_gq_start_timer(struct inet6_dev *idev)
998{
Aruna-Hewapathirane63862b52014-01-11 07:15:59 -0500999 unsigned long tv = prandom_u32() % idev->mc_maxdelay;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000
1001 idev->mc_gq_running = 1;
1002 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
1003 in6_dev_hold(idev);
1004}
1005
Daniel Borkmannb4af8de2013-09-04 00:19:43 +02001006static void mld_gq_stop_timer(struct inet6_dev *idev)
1007{
1008 idev->mc_gq_running = 0;
1009 if (del_timer(&idev->mc_gq_timer))
1010 __in6_dev_put(idev);
1011}
1012
Daniel Borkmannc2cef4e2013-08-20 12:22:01 +02001013static void mld_ifc_start_timer(struct inet6_dev *idev, unsigned long delay)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014{
Aruna-Hewapathirane63862b52014-01-11 07:15:59 -05001015 unsigned long tv = prandom_u32() % delay;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016
1017 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
1018 in6_dev_hold(idev);
1019}
1020
Daniel Borkmannb4af8de2013-09-04 00:19:43 +02001021static void mld_ifc_stop_timer(struct inet6_dev *idev)
1022{
1023 idev->mc_ifc_count = 0;
1024 if (del_timer(&idev->mc_ifc_timer))
1025 __in6_dev_put(idev);
1026}
1027
Daniel Borkmannc2cef4e2013-08-20 12:22:01 +02001028static void mld_dad_start_timer(struct inet6_dev *idev, unsigned long delay)
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02001029{
Aruna-Hewapathirane63862b52014-01-11 07:15:59 -05001030 unsigned long tv = prandom_u32() % delay;
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02001031
1032 if (!mod_timer(&idev->mc_dad_timer, jiffies+tv+2))
1033 in6_dev_hold(idev);
1034}
1035
Daniel Borkmannb4af8de2013-09-04 00:19:43 +02001036static void mld_dad_stop_timer(struct inet6_dev *idev)
1037{
1038 if (del_timer(&idev->mc_dad_timer))
1039 __in6_dev_put(idev);
1040}
1041
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042/*
1043 * IGMP handling (alias multicast ICMPv6 messages)
1044 */
1045
1046static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
1047{
1048 unsigned long delay = resptime;
1049
1050 /* Do not start timer for these addresses */
1051 if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
1052 IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
1053 return;
1054
1055 if (del_timer(&ma->mca_timer)) {
1056 atomic_dec(&ma->mca_refcnt);
1057 delay = ma->mca_timer.expires - jiffies;
1058 }
1059
Daniel Borkmanncc7f7ab2013-09-04 00:19:41 +02001060 if (delay >= resptime)
Aruna-Hewapathirane63862b52014-01-11 07:15:59 -05001061 delay = prandom_u32() % resptime;
Daniel Borkmanncc7f7ab2013-09-04 00:19:41 +02001062
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 ma->mca_timer.expires = jiffies + delay;
1064 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1065 atomic_inc(&ma->mca_refcnt);
1066 ma->mca_flags |= MAF_TIMER_RUNNING;
1067}
1068
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001069/* mark EXCLUDE-mode sources */
Eric Dumazeta50feda2012-05-18 18:57:34 +00001070static bool mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
1071 const struct in6_addr *srcs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072{
1073 struct ip6_sf_list *psf;
1074 int i, scount;
1075
1076 scount = 0;
Ian Morris67ba4152014-08-24 21:53:10 +01001077 for (psf = pmc->mca_sources; psf; psf = psf->sf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 if (scount == nsrcs)
1079 break;
Ian Morris67ba4152014-08-24 21:53:10 +01001080 for (i = 0; i < nsrcs; i++) {
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001081 /* skip inactive filters */
Yan, Zhenge05c4ad32011-08-23 22:54:37 +00001082 if (psf->sf_count[MCAST_INCLUDE] ||
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001083 pmc->mca_sfcount[MCAST_EXCLUDE] !=
1084 psf->sf_count[MCAST_EXCLUDE])
RongQing.Lice713ee2012-04-05 17:36:29 +08001085 break;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001086 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1087 scount++;
1088 break;
1089 }
1090 }
1091 }
1092 pmc->mca_flags &= ~MAF_GSQUERY;
1093 if (scount == nsrcs) /* all sources excluded */
Eric Dumazeta50feda2012-05-18 18:57:34 +00001094 return false;
1095 return true;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001096}
1097
Eric Dumazeta50feda2012-05-18 18:57:34 +00001098static bool mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
1099 const struct in6_addr *srcs)
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001100{
1101 struct ip6_sf_list *psf;
1102 int i, scount;
1103
1104 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1105 return mld_xmarksources(pmc, nsrcs, srcs);
1106
1107 /* mark INCLUDE-mode sources */
1108
1109 scount = 0;
Ian Morris67ba4152014-08-24 21:53:10 +01001110 for (psf = pmc->mca_sources; psf; psf = psf->sf_next) {
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001111 if (scount == nsrcs)
1112 break;
Ian Morris67ba4152014-08-24 21:53:10 +01001113 for (i = 0; i < nsrcs; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1115 psf->sf_gsresp = 1;
1116 scount++;
1117 break;
1118 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001119 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001121 if (!scount) {
1122 pmc->mca_flags &= ~MAF_GSQUERY;
Eric Dumazeta50feda2012-05-18 18:57:34 +00001123 return false;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001124 }
1125 pmc->mca_flags |= MAF_GSQUERY;
Eric Dumazeta50feda2012-05-18 18:57:34 +00001126 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127}
1128
Daniel Borkmann58c0ecf2013-09-04 00:19:40 +02001129static int mld_force_mld_version(const struct inet6_dev *idev)
1130{
1131 /* Normally, both are 0 here. If enforcement to a particular is
1132 * being used, individual device enforcement will have a lower
1133 * precedence over 'all' device (.../conf/all/force_mld_version).
1134 */
1135
1136 if (dev_net(idev->dev)->ipv6.devconf_all->force_mld_version != 0)
1137 return dev_net(idev->dev)->ipv6.devconf_all->force_mld_version;
1138 else
1139 return idev->cnf.force_mld_version;
1140}
1141
1142static bool mld_in_v2_mode_only(const struct inet6_dev *idev)
1143{
1144 return mld_force_mld_version(idev) == 2;
1145}
1146
1147static bool mld_in_v1_mode_only(const struct inet6_dev *idev)
1148{
1149 return mld_force_mld_version(idev) == 1;
1150}
1151
Daniel Borkmann6c567b72013-09-04 00:19:38 +02001152static bool mld_in_v1_mode(const struct inet6_dev *idev)
1153{
Daniel Borkmann58c0ecf2013-09-04 00:19:40 +02001154 if (mld_in_v2_mode_only(idev))
1155 return false;
1156 if (mld_in_v1_mode_only(idev))
Daniel Borkmann6c567b72013-09-04 00:19:38 +02001157 return true;
1158 if (idev->mc_v1_seen && time_before(jiffies, idev->mc_v1_seen))
1159 return true;
1160
1161 return false;
1162}
1163
Daniel Borkmann89225d12013-09-04 00:19:37 +02001164static void mld_set_v1_mode(struct inet6_dev *idev)
1165{
1166 /* RFC3810, relevant sections:
1167 * - 9.1. Robustness Variable
1168 * - 9.2. Query Interval
1169 * - 9.3. Query Response Interval
1170 * - 9.12. Older Version Querier Present Timeout
1171 */
1172 unsigned long switchback;
1173
1174 switchback = (idev->mc_qrv * idev->mc_qi) + idev->mc_qri;
1175
1176 idev->mc_v1_seen = jiffies + switchback;
1177}
1178
1179static void mld_update_qrv(struct inet6_dev *idev,
1180 const struct mld2_query *mlh2)
1181{
1182 /* RFC3810, relevant sections:
1183 * - 5.1.8. QRV (Querier's Robustness Variable)
1184 * - 9.1. Robustness Variable
1185 */
1186
1187 /* The value of the Robustness Variable MUST NOT be zero,
1188 * and SHOULD NOT be one. Catch this here if we ever run
1189 * into such a case in future.
1190 */
Hannes Frederic Sowa2f711932014-09-02 15:49:25 +02001191 const int min_qrv = min(MLD_QRV_DEFAULT, sysctl_mld_qrv);
Daniel Borkmann89225d12013-09-04 00:19:37 +02001192 WARN_ON(idev->mc_qrv == 0);
1193
1194 if (mlh2->mld2q_qrv > 0)
1195 idev->mc_qrv = mlh2->mld2q_qrv;
1196
Hannes Frederic Sowa2f711932014-09-02 15:49:25 +02001197 if (unlikely(idev->mc_qrv < min_qrv)) {
Daniel Borkmann89225d12013-09-04 00:19:37 +02001198 net_warn_ratelimited("IPv6: MLD: clamping QRV from %u to %u!\n",
Hannes Frederic Sowa2f711932014-09-02 15:49:25 +02001199 idev->mc_qrv, min_qrv);
1200 idev->mc_qrv = min_qrv;
Daniel Borkmann89225d12013-09-04 00:19:37 +02001201 }
1202}
1203
1204static void mld_update_qi(struct inet6_dev *idev,
1205 const struct mld2_query *mlh2)
1206{
1207 /* RFC3810, relevant sections:
1208 * - 5.1.9. QQIC (Querier's Query Interval Code)
1209 * - 9.2. Query Interval
1210 * - 9.12. Older Version Querier Present Timeout
1211 * (the [Query Interval] in the last Query received)
1212 */
1213 unsigned long mc_qqi;
1214
1215 if (mlh2->mld2q_qqic < 128) {
1216 mc_qqi = mlh2->mld2q_qqic;
1217 } else {
1218 unsigned long mc_man, mc_exp;
1219
1220 mc_exp = MLDV2_QQIC_EXP(mlh2->mld2q_qqic);
1221 mc_man = MLDV2_QQIC_MAN(mlh2->mld2q_qqic);
1222
1223 mc_qqi = (mc_man | 0x10) << (mc_exp + 3);
1224 }
1225
1226 idev->mc_qi = mc_qqi * HZ;
1227}
1228
1229static void mld_update_qri(struct inet6_dev *idev,
1230 const struct mld2_query *mlh2)
1231{
1232 /* RFC3810, relevant sections:
1233 * - 5.1.3. Maximum Response Code
1234 * - 9.3. Query Response Interval
1235 */
Daniel Borkmanne3f5b172013-09-04 00:19:39 +02001236 idev->mc_qri = msecs_to_jiffies(mldv2_mrc(mlh2));
Daniel Borkmann89225d12013-09-04 00:19:37 +02001237}
1238
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001239static int mld_process_v1(struct inet6_dev *idev, struct mld_msg *mld,
Daniel Borkmann35f7aa52014-09-20 14:03:55 +02001240 unsigned long *max_delay, bool v1_query)
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001241{
1242 unsigned long mldv1_md;
1243
1244 /* Ignore v1 queries */
1245 if (mld_in_v2_mode_only(idev))
1246 return -EINVAL;
1247
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001248 mldv1_md = ntohs(mld->mld_maxdelay);
Daniel Borkmann35f7aa52014-09-20 14:03:55 +02001249
1250 /* When in MLDv1 fallback and a MLDv2 router start-up being
1251 * unaware of current MLDv1 operation, the MRC == MRD mapping
1252 * only works when the exponential algorithm is not being
1253 * used (as MLDv1 is unaware of such things).
1254 *
1255 * According to the RFC author, the MLDv2 implementations
1256 * he's aware of all use a MRC < 32768 on start up queries.
1257 *
1258 * Thus, should we *ever* encounter something else larger
1259 * than that, just assume the maximum possible within our
1260 * reach.
1261 */
1262 if (!v1_query)
1263 mldv1_md = min(mldv1_md, MLDV1_MRD_MAX_COMPAT);
1264
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001265 *max_delay = max(msecs_to_jiffies(mldv1_md), 1UL);
1266
Daniel Borkmann35f7aa52014-09-20 14:03:55 +02001267 /* MLDv1 router present: we need to go into v1 mode *only*
1268 * when an MLDv1 query is received as per section 9.12. of
1269 * RFC3810! And we know from RFC2710 section 3.7 that MLDv1
1270 * queries MUST be of exactly 24 octets.
1271 */
1272 if (v1_query)
1273 mld_set_v1_mode(idev);
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001274
1275 /* cancel MLDv2 report timer */
Daniel Borkmannb4af8de2013-09-04 00:19:43 +02001276 mld_gq_stop_timer(idev);
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001277 /* cancel the interface change timer */
Daniel Borkmannb4af8de2013-09-04 00:19:43 +02001278 mld_ifc_stop_timer(idev);
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001279 /* clear deleted report items */
1280 mld_clear_delrec(idev);
1281
1282 return 0;
1283}
1284
1285static int mld_process_v2(struct inet6_dev *idev, struct mld2_query *mld,
1286 unsigned long *max_delay)
1287{
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001288 *max_delay = max(msecs_to_jiffies(mldv2_mrc(mld)), 1UL);
1289
1290 mld_update_qrv(idev, mld);
1291 mld_update_qi(idev, mld);
1292 mld_update_qri(idev, mld);
1293
1294 idev->mc_maxdelay = *max_delay;
1295
1296 return 0;
1297}
1298
Eric Dumazet96b52e62010-06-07 21:05:02 +00001299/* called with rcu_read_lock() */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300int igmp6_event_query(struct sk_buff *skb)
1301{
Yan Zheng97300b52005-10-31 20:09:45 +08001302 struct mld2_query *mlh2 = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303 struct ifmcaddr6 *ma;
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001304 const struct in6_addr *group;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 unsigned long max_delay;
1306 struct inet6_dev *idev;
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001307 struct mld_msg *mld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 int group_type;
1309 int mark = 0;
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001310 int len, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311
1312 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1313 return -EINVAL;
1314
1315 /* compute payload length excluding extension headers */
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -07001316 len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr);
Arnaldo Carvalho de Melocfe1fc72007-03-16 17:26:39 -03001317 len -= skb_network_header_len(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318
Hangbin Liue940f5d2014-06-27 09:57:53 +08001319 /* RFC3810 6.2
1320 * Upon reception of an MLD message that contains a Query, the node
1321 * checks if the source address of the message is a valid link-local
1322 * address, if the Hop Limit is set to 1, and if the Router Alert
1323 * option is present in the Hop-By-Hop Options header of the IPv6
1324 * packet. If any of these checks fails, the packet is dropped.
1325 */
1326 if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL) ||
1327 ipv6_hdr(skb)->hop_limit != 1 ||
1328 !(IP6CB(skb)->flags & IP6SKB_ROUTERALERT) ||
1329 IP6CB(skb)->ra != htons(IPV6_OPT_ROUTERALERT_MLD))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 return -EINVAL;
1331
Eric Dumazet96b52e62010-06-07 21:05:02 +00001332 idev = __in6_dev_get(skb->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333 if (idev == NULL)
1334 return 0;
1335
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001336 mld = (struct mld_msg *)icmp6_hdr(skb);
1337 group = &mld->mld_mca;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338 group_type = ipv6_addr_type(group);
1339
1340 if (group_type != IPV6_ADDR_ANY &&
Eric Dumazet96b52e62010-06-07 21:05:02 +00001341 !(group_type&IPV6_ADDR_MULTICAST))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343
Daniel Borkmann35f7aa52014-09-20 14:03:55 +02001344 if (len < MLD_V1_QUERY_LEN) {
1345 return -EINVAL;
1346 } else if (len == MLD_V1_QUERY_LEN || mld_in_v1_mode(idev)) {
1347 err = mld_process_v1(idev, mld, &max_delay,
1348 len == MLD_V1_QUERY_LEN);
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001349 if (err < 0)
1350 return err;
Daniel Borkmann9fd07842013-08-20 12:22:02 +02001351 } else if (len >= MLD_V2_QUERY_LEN_MIN) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001352 int srcs_offset = sizeof(struct mld2_query) -
Yan Zheng97300b52005-10-31 20:09:45 +08001353 sizeof(struct icmp6hdr);
Daniel Borkmann89225d12013-09-04 00:19:37 +02001354
Eric Dumazet96b52e62010-06-07 21:05:02 +00001355 if (!pskb_may_pull(skb, srcs_offset))
Yan Zheng97300b52005-10-31 20:09:45 +08001356 return -EINVAL;
Eric Dumazet96b52e62010-06-07 21:05:02 +00001357
Arnaldo Carvalho de Melo9c702202007-04-25 18:04:18 -07001358 mlh2 = (struct mld2_query *)skb_transport_header(skb);
Daniel Borkmann84698962013-08-20 12:22:00 +02001359
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001360 err = mld_process_v2(idev, mlh2, &max_delay);
1361 if (err < 0)
1362 return err;
Daniel Borkmann89225d12013-09-04 00:19:37 +02001363
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364 if (group_type == IPV6_ADDR_ANY) { /* general query */
Eric Dumazet96b52e62010-06-07 21:05:02 +00001365 if (mlh2->mld2q_nsrcs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366 return -EINVAL; /* no sources allowed */
Eric Dumazet96b52e62010-06-07 21:05:02 +00001367
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 mld_gq_start_timer(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 return 0;
1370 }
1371 /* mark sources to include, if group & source-specific */
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001372 if (mlh2->mld2q_nsrcs != 0) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001373 if (!pskb_may_pull(skb, srcs_offset +
Eric Dumazet96b52e62010-06-07 21:05:02 +00001374 ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr)))
Yan Zheng97300b52005-10-31 20:09:45 +08001375 return -EINVAL;
Eric Dumazet96b52e62010-06-07 21:05:02 +00001376
Arnaldo Carvalho de Melo9c702202007-04-25 18:04:18 -07001377 mlh2 = (struct mld2_query *)skb_transport_header(skb);
Yan Zheng97300b52005-10-31 20:09:45 +08001378 mark = 1;
1379 }
Daniel Borkmann35f7aa52014-09-20 14:03:55 +02001380 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381 return -EINVAL;
Daniel Borkmann35f7aa52014-09-20 14:03:55 +02001382 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383
1384 read_lock_bh(&idev->lock);
1385 if (group_type == IPV6_ADDR_ANY) {
Ian Morris67ba4152014-08-24 21:53:10 +01001386 for (ma = idev->mc_list; ma; ma = ma->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387 spin_lock_bh(&ma->mca_lock);
1388 igmp6_group_queried(ma, max_delay);
1389 spin_unlock_bh(&ma->mca_lock);
1390 }
1391 } else {
Ian Morris67ba4152014-08-24 21:53:10 +01001392 for (ma = idev->mc_list; ma; ma = ma->next) {
David L Stevens7add2a42006-01-24 13:06:39 -08001393 if (!ipv6_addr_equal(group, &ma->mca_addr))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394 continue;
1395 spin_lock_bh(&ma->mca_lock);
1396 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1397 /* gsquery <- gsquery && mark */
1398 if (!mark)
1399 ma->mca_flags &= ~MAF_GSQUERY;
1400 } else {
1401 /* gsquery <- mark */
1402 if (mark)
1403 ma->mca_flags |= MAF_GSQUERY;
1404 else
1405 ma->mca_flags &= ~MAF_GSQUERY;
1406 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001407 if (!(ma->mca_flags & MAF_GSQUERY) ||
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001408 mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs))
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001409 igmp6_group_queried(ma, max_delay);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410 spin_unlock_bh(&ma->mca_lock);
David L Stevens7add2a42006-01-24 13:06:39 -08001411 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412 }
1413 }
1414 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415
1416 return 0;
1417}
1418
Eric Dumazet96b52e62010-06-07 21:05:02 +00001419/* called with rcu_read_lock() */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420int igmp6_event_report(struct sk_buff *skb)
1421{
1422 struct ifmcaddr6 *ma;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423 struct inet6_dev *idev;
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001424 struct mld_msg *mld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425 int addr_type;
1426
1427 /* Our own report looped back. Ignore it. */
1428 if (skb->pkt_type == PACKET_LOOPBACK)
1429 return 0;
1430
David Stevens24c69272005-12-02 20:32:59 -08001431 /* send our report if the MC router may not have heard this report */
1432 if (skb->pkt_type != PACKET_MULTICAST &&
1433 skb->pkt_type != PACKET_BROADCAST)
1434 return 0;
1435
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001436 if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437 return -EINVAL;
1438
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001439 mld = (struct mld_msg *)icmp6_hdr(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440
1441 /* Drop reports with not link local source */
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -07001442 addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001443 if (addr_type != IPV6_ADDR_ANY &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444 !(addr_type&IPV6_ADDR_LINKLOCAL))
1445 return -EINVAL;
1446
Eric Dumazet96b52e62010-06-07 21:05:02 +00001447 idev = __in6_dev_get(skb->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448 if (idev == NULL)
1449 return -ENODEV;
1450
1451 /*
1452 * Cancel the timer for this group
1453 */
1454
1455 read_lock_bh(&idev->lock);
Ian Morris67ba4152014-08-24 21:53:10 +01001456 for (ma = idev->mc_list; ma; ma = ma->next) {
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001457 if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458 spin_lock(&ma->mca_lock);
1459 if (del_timer(&ma->mca_timer))
1460 atomic_dec(&ma->mca_refcnt);
1461 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1462 spin_unlock(&ma->mca_lock);
1463 break;
1464 }
1465 }
1466 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467 return 0;
1468}
1469
Eric Dumazeta50feda2012-05-18 18:57:34 +00001470static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1471 int gdeleted, int sdeleted)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001472{
1473 switch (type) {
1474 case MLD2_MODE_IS_INCLUDE:
1475 case MLD2_MODE_IS_EXCLUDE:
1476 if (gdeleted || sdeleted)
Eric Dumazeta50feda2012-05-18 18:57:34 +00001477 return false;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001478 if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
1479 if (pmc->mca_sfmode == MCAST_INCLUDE)
Eric Dumazeta50feda2012-05-18 18:57:34 +00001480 return true;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001481 /* don't include if this source is excluded
1482 * in all filters
1483 */
1484 if (psf->sf_count[MCAST_INCLUDE])
David L Stevens7add2a42006-01-24 13:06:39 -08001485 return type == MLD2_MODE_IS_INCLUDE;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001486 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1487 psf->sf_count[MCAST_EXCLUDE];
1488 }
Eric Dumazeta50feda2012-05-18 18:57:34 +00001489 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490 case MLD2_CHANGE_TO_INCLUDE:
1491 if (gdeleted || sdeleted)
Eric Dumazeta50feda2012-05-18 18:57:34 +00001492 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493 return psf->sf_count[MCAST_INCLUDE] != 0;
1494 case MLD2_CHANGE_TO_EXCLUDE:
1495 if (gdeleted || sdeleted)
Eric Dumazeta50feda2012-05-18 18:57:34 +00001496 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1498 psf->sf_count[MCAST_INCLUDE])
Eric Dumazeta50feda2012-05-18 18:57:34 +00001499 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1501 psf->sf_count[MCAST_EXCLUDE];
1502 case MLD2_ALLOW_NEW_SOURCES:
1503 if (gdeleted || !psf->sf_crcount)
Eric Dumazeta50feda2012-05-18 18:57:34 +00001504 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1506 case MLD2_BLOCK_OLD_SOURCES:
1507 if (pmc->mca_sfmode == MCAST_INCLUDE)
1508 return gdeleted || (psf->sf_crcount && sdeleted);
1509 return psf->sf_crcount && !gdeleted && !sdeleted;
1510 }
Eric Dumazeta50feda2012-05-18 18:57:34 +00001511 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512}
1513
1514static int
1515mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1516{
1517 struct ip6_sf_list *psf;
1518 int scount = 0;
1519
Ian Morris67ba4152014-08-24 21:53:10 +01001520 for (psf = pmc->mca_sources; psf; psf = psf->sf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1522 continue;
1523 scount++;
1524 }
1525 return scount;
1526}
1527
YOSHIFUJI Hideaki / 吉藤英明2576f172013-01-21 06:48:19 +00001528static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb,
1529 struct net_device *dev,
1530 const struct in6_addr *saddr,
1531 const struct in6_addr *daddr,
1532 int proto, int len)
1533{
1534 struct ipv6hdr *hdr;
1535
1536 skb->protocol = htons(ETH_P_IPV6);
1537 skb->dev = dev;
1538
1539 skb_reset_network_header(skb);
1540 skb_put(skb, sizeof(struct ipv6hdr));
1541 hdr = ipv6_hdr(skb);
1542
1543 ip6_flow_hdr(hdr, 0, 0);
1544
1545 hdr->payload_len = htons(len);
1546 hdr->nexthdr = proto;
1547 hdr->hop_limit = inet6_sk(sk)->hop_limit;
1548
1549 hdr->saddr = *saddr;
1550 hdr->daddr = *daddr;
1551}
1552
Amerigo Wang89657792013-06-29 21:30:49 +08001553static struct sk_buff *mld_newpack(struct inet6_dev *idev, int size)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554{
Amerigo Wang89657792013-06-29 21:30:49 +08001555 struct net_device *dev = idev->dev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001556 struct net *net = dev_net(dev);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08001557 struct sock *sk = net->ipv6.igmp_sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558 struct sk_buff *skb;
1559 struct mld2_report *pmr;
1560 struct in6_addr addr_buf;
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09001561 const struct in6_addr *saddr;
Herbert Xua7ae1992011-11-18 02:20:04 +00001562 int hlen = LL_RESERVED_SPACE(dev);
1563 int tlen = dev->needed_tailroom;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564 int err;
1565 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1566 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1567 IPV6_TLV_PADN, 0 };
1568
1569 /* we assume size > sizeof(ra) here */
Herbert Xua7ae1992011-11-18 02:20:04 +00001570 size += hlen + tlen;
Eric Dumazet72e09ad2010-06-05 03:03:30 -07001571 /* limit our allocations to order-0 page */
1572 size = min_t(int, size, SKB_MAX_ORDER(0, 0));
1573 skb = sock_alloc_send_skb(sk, size, 1, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574
Stephen Hemmingercfcabdc2007-10-09 01:59:42 -07001575 if (!skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576 return NULL;
1577
Hannes Frederic Sowa9d4a0312013-07-26 17:05:16 +02001578 skb->priority = TC_PRIO_CONTROL;
Herbert Xua7ae1992011-11-18 02:20:04 +00001579 skb_reserve(skb, hlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580
Amerigo Wang89657792013-06-29 21:30:49 +08001581 if (__ipv6_get_lladdr(idev, &addr_buf, IFA_F_TENTATIVE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582 /* <draft-ietf-magma-mld-source-05.txt>:
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001583 * use unspecified address as the source address
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584 * when a valid link-local address is not available.
1585 */
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09001586 saddr = &in6addr_any;
1587 } else
1588 saddr = &addr_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589
YOSHIFUJI Hideaki / 吉藤英明2576f172013-01-21 06:48:19 +00001590 ip6_mc_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591
1592 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1593
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -07001594 skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data);
Arnaldo Carvalho de Melod10ba342007-03-14 21:05:37 -03001595 skb_put(skb, sizeof(*pmr));
1596 pmr = (struct mld2_report *)skb_transport_header(skb);
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001597 pmr->mld2r_type = ICMPV6_MLD2_REPORT;
1598 pmr->mld2r_resv1 = 0;
1599 pmr->mld2r_cksum = 0;
1600 pmr->mld2r_resv2 = 0;
1601 pmr->mld2r_ngrec = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602 return skb;
1603}
1604
1605static void mld_sendpack(struct sk_buff *skb)
1606{
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -07001607 struct ipv6hdr *pip6 = ipv6_hdr(skb);
Arnaldo Carvalho de Melo9c702202007-04-25 18:04:18 -07001608 struct mld2_report *pmr =
1609 (struct mld2_report *)skb_transport_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001610 int payload_len, mldlen;
Eric Dumazet96b52e62010-06-07 21:05:02 +00001611 struct inet6_dev *idev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001612 struct net *net = dev_net(skb->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613 int err;
David S. Miller4c9483b2011-03-12 16:22:43 -05001614 struct flowi6 fl6;
Eric Dumazetadf30902009-06-02 05:19:30 +00001615 struct dst_entry *dst;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616
Eric Dumazet96b52e62010-06-07 21:05:02 +00001617 rcu_read_lock();
1618 idev = __in6_dev_get(skb->dev);
Neil Hormanedf391f2009-04-27 02:45:02 -07001619 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
1620
Simon Horman29a3cad2013-05-28 20:34:26 +00001621 payload_len = (skb_tail_pointer(skb) - skb_network_header(skb)) -
1622 sizeof(*pip6);
1623 mldlen = skb_tail_pointer(skb) - skb_transport_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624 pip6->payload_len = htons(payload_len);
1625
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001626 pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
1627 IPPROTO_ICMPV6,
1628 csum_partial(skb_transport_header(skb),
1629 mldlen, 0));
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001630
David S. Miller4c9483b2011-03-12 16:22:43 -05001631 icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT,
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001632 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
1633 skb->dev->ifindex);
YOSHIFUJI Hideaki / 吉藤英明12fd84f2013-01-18 02:00:24 +00001634 dst = icmp6_dst_alloc(skb->dev, &fl6);
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001635
David S. Miller452edd52011-03-02 13:27:41 -08001636 err = 0;
1637 if (IS_ERR(dst)) {
1638 err = PTR_ERR(dst);
1639 dst = NULL;
1640 }
Eric Dumazetadf30902009-06-02 05:19:30 +00001641 skb_dst_set(skb, dst);
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001642 if (err)
1643 goto err_out;
1644
Neil Hormanedf391f2009-04-27 02:45:02 -07001645 payload_len = skb->len;
1646
Jan Engelhardtb2e0b382010-03-23 04:09:07 +01001647 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001648 dst_output);
1649out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650 if (!err) {
Hannes Frederic Sowa43a43b62014-03-31 20:14:10 +02001651 ICMP6MSGOUT_INC_STATS(net, idev, ICMPV6_MLD2_REPORT);
1652 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
1653 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, payload_len);
1654 } else {
1655 IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
1656 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657
Eric Dumazet96b52e62010-06-07 21:05:02 +00001658 rcu_read_unlock();
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001659 return;
1660
1661err_out:
1662 kfree_skb(skb);
1663 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001664}
1665
1666static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
1667{
Yan Zhengfab10fe2005-10-05 12:08:13 -07001668 return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001669}
1670
1671static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
1672 int type, struct mld2_grec **ppgr)
1673{
1674 struct net_device *dev = pmc->idev->dev;
1675 struct mld2_report *pmr;
1676 struct mld2_grec *pgr;
1677
1678 if (!skb)
Amerigo Wang89657792013-06-29 21:30:49 +08001679 skb = mld_newpack(pmc->idev, dev->mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001680 if (!skb)
1681 return NULL;
1682 pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec));
1683 pgr->grec_type = type;
1684 pgr->grec_auxwords = 0;
1685 pgr->grec_nsrcs = 0;
1686 pgr->grec_mca = pmc->mca_addr; /* structure copy */
Arnaldo Carvalho de Melo9c702202007-04-25 18:04:18 -07001687 pmr = (struct mld2_report *)skb_transport_header(skb);
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001688 pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689 *ppgr = pgr;
1690 return skb;
1691}
1692
1693#define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
1694 skb_tailroom(skb)) : 0)
1695
1696static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
Flavio Leitner6a7cc412014-01-16 19:27:59 -02001697 int type, int gdeleted, int sdeleted, int crsend)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698{
Amerigo Wang89657792013-06-29 21:30:49 +08001699 struct inet6_dev *idev = pmc->idev;
1700 struct net_device *dev = idev->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701 struct mld2_report *pmr;
1702 struct mld2_grec *pgr = NULL;
1703 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001704 int scount, stotal, first, isquery, truncate;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001705
1706 if (pmc->mca_flags & MAF_NOREPORT)
1707 return skb;
1708
1709 isquery = type == MLD2_MODE_IS_INCLUDE ||
1710 type == MLD2_MODE_IS_EXCLUDE;
1711 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1712 type == MLD2_CHANGE_TO_EXCLUDE;
1713
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001714 stotal = scount = 0;
1715
Linus Torvalds1da177e2005-04-16 15:20:36 -07001716 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1717
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001718 if (!*psf_list)
1719 goto empty_source;
1720
Arnaldo Carvalho de Melo9c702202007-04-25 18:04:18 -07001721 pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722
1723 /* EX and TO_EX get a fresh packet, if needed */
1724 if (truncate) {
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001725 if (pmr && pmr->mld2r_ngrec &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1727 if (skb)
1728 mld_sendpack(skb);
Amerigo Wang89657792013-06-29 21:30:49 +08001729 skb = mld_newpack(idev, dev->mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001730 }
1731 }
1732 first = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001733 psf_prev = NULL;
Ian Morris67ba4152014-08-24 21:53:10 +01001734 for (psf = *psf_list; psf; psf = psf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001735 struct in6_addr *psrc;
1736
1737 psf_next = psf->sf_next;
1738
1739 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1740 psf_prev = psf;
1741 continue;
1742 }
1743
1744 /* clear marks on query responses */
1745 if (isquery)
1746 psf->sf_gsresp = 0;
1747
1748 if (AVAILABLE(skb) < sizeof(*psrc) +
1749 first*sizeof(struct mld2_grec)) {
1750 if (truncate && !first)
1751 break; /* truncate these */
1752 if (pgr)
1753 pgr->grec_nsrcs = htons(scount);
1754 if (skb)
1755 mld_sendpack(skb);
Amerigo Wang89657792013-06-29 21:30:49 +08001756 skb = mld_newpack(idev, dev->mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001757 first = 1;
1758 scount = 0;
1759 }
1760 if (first) {
1761 skb = add_grhead(skb, pmc, type, &pgr);
1762 first = 0;
1763 }
Alexey Dobriyancc63f702007-02-06 14:35:25 -08001764 if (!skb)
1765 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1767 *psrc = psf->sf_addr;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001768 scount++; stotal++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001769 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1770 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1771 psf->sf_crcount--;
1772 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1773 if (psf_prev)
1774 psf_prev->sf_next = psf->sf_next;
1775 else
1776 *psf_list = psf->sf_next;
1777 kfree(psf);
1778 continue;
1779 }
1780 }
1781 psf_prev = psf;
1782 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001783
1784empty_source:
1785 if (!stotal) {
1786 if (type == MLD2_ALLOW_NEW_SOURCES ||
1787 type == MLD2_BLOCK_OLD_SOURCES)
1788 return skb;
Flavio Leitner6a7cc412014-01-16 19:27:59 -02001789 if (pmc->mca_crcount || isquery || crsend) {
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001790 /* make sure we have room for group header */
1791 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
1792 mld_sendpack(skb);
1793 skb = NULL; /* add_grhead will get a new one */
1794 }
1795 skb = add_grhead(skb, pmc, type, &pgr);
1796 }
1797 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001798 if (pgr)
1799 pgr->grec_nsrcs = htons(scount);
1800
1801 if (isquery)
1802 pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
1803 return skb;
1804}
1805
1806static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1807{
1808 struct sk_buff *skb = NULL;
1809 int type;
1810
Amerigo Wang89657792013-06-29 21:30:49 +08001811 read_lock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812 if (!pmc) {
Ian Morris67ba4152014-08-24 21:53:10 +01001813 for (pmc = idev->mc_list; pmc; pmc = pmc->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001814 if (pmc->mca_flags & MAF_NOREPORT)
1815 continue;
1816 spin_lock_bh(&pmc->mca_lock);
1817 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1818 type = MLD2_MODE_IS_EXCLUDE;
1819 else
1820 type = MLD2_MODE_IS_INCLUDE;
Flavio Leitner6a7cc412014-01-16 19:27:59 -02001821 skb = add_grec(skb, pmc, type, 0, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001822 spin_unlock_bh(&pmc->mca_lock);
1823 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001824 } else {
1825 spin_lock_bh(&pmc->mca_lock);
1826 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1827 type = MLD2_MODE_IS_EXCLUDE;
1828 else
1829 type = MLD2_MODE_IS_INCLUDE;
Flavio Leitner6a7cc412014-01-16 19:27:59 -02001830 skb = add_grec(skb, pmc, type, 0, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831 spin_unlock_bh(&pmc->mca_lock);
1832 }
Amerigo Wang89657792013-06-29 21:30:49 +08001833 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001834 if (skb)
1835 mld_sendpack(skb);
1836}
1837
1838/*
1839 * remove zero-count source records from a source filter list
1840 */
1841static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1842{
1843 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1844
1845 psf_prev = NULL;
Ian Morris67ba4152014-08-24 21:53:10 +01001846 for (psf = *ppsf; psf; psf = psf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847 psf_next = psf->sf_next;
1848 if (psf->sf_crcount == 0) {
1849 if (psf_prev)
1850 psf_prev->sf_next = psf->sf_next;
1851 else
1852 *ppsf = psf->sf_next;
1853 kfree(psf);
1854 } else
1855 psf_prev = psf;
1856 }
1857}
1858
1859static void mld_send_cr(struct inet6_dev *idev)
1860{
1861 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1862 struct sk_buff *skb = NULL;
1863 int type, dtype;
1864
1865 read_lock_bh(&idev->lock);
Stephen Hemminger6457d262010-02-17 18:48:44 -08001866 spin_lock(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001867
1868 /* deleted MCA's */
1869 pmc_prev = NULL;
Ian Morris67ba4152014-08-24 21:53:10 +01001870 for (pmc = idev->mc_tomb; pmc; pmc = pmc_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001871 pmc_next = pmc->next;
1872 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1873 type = MLD2_BLOCK_OLD_SOURCES;
1874 dtype = MLD2_BLOCK_OLD_SOURCES;
Flavio Leitner6a7cc412014-01-16 19:27:59 -02001875 skb = add_grec(skb, pmc, type, 1, 0, 0);
1876 skb = add_grec(skb, pmc, dtype, 1, 1, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001877 }
1878 if (pmc->mca_crcount) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001879 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1880 type = MLD2_CHANGE_TO_INCLUDE;
Flavio Leitner6a7cc412014-01-16 19:27:59 -02001881 skb = add_grec(skb, pmc, type, 1, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001883 pmc->mca_crcount--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884 if (pmc->mca_crcount == 0) {
1885 mld_clear_zeros(&pmc->mca_tomb);
1886 mld_clear_zeros(&pmc->mca_sources);
1887 }
1888 }
1889 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1890 !pmc->mca_sources) {
1891 if (pmc_prev)
1892 pmc_prev->next = pmc_next;
1893 else
1894 idev->mc_tomb = pmc_next;
1895 in6_dev_put(pmc->idev);
1896 kfree(pmc);
1897 } else
1898 pmc_prev = pmc;
1899 }
Stephen Hemminger6457d262010-02-17 18:48:44 -08001900 spin_unlock(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001901
1902 /* change recs */
Ian Morris67ba4152014-08-24 21:53:10 +01001903 for (pmc = idev->mc_list; pmc; pmc = pmc->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904 spin_lock_bh(&pmc->mca_lock);
1905 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1906 type = MLD2_BLOCK_OLD_SOURCES;
1907 dtype = MLD2_ALLOW_NEW_SOURCES;
1908 } else {
1909 type = MLD2_ALLOW_NEW_SOURCES;
1910 dtype = MLD2_BLOCK_OLD_SOURCES;
1911 }
Flavio Leitner6a7cc412014-01-16 19:27:59 -02001912 skb = add_grec(skb, pmc, type, 0, 0, 0);
1913 skb = add_grec(skb, pmc, dtype, 0, 1, 0); /* deleted sources */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914
1915 /* filter mode changes */
1916 if (pmc->mca_crcount) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1918 type = MLD2_CHANGE_TO_EXCLUDE;
1919 else
1920 type = MLD2_CHANGE_TO_INCLUDE;
Flavio Leitner6a7cc412014-01-16 19:27:59 -02001921 skb = add_grec(skb, pmc, type, 0, 0, 0);
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001922 pmc->mca_crcount--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923 }
1924 spin_unlock_bh(&pmc->mca_lock);
1925 }
1926 read_unlock_bh(&idev->lock);
1927 if (!skb)
1928 return;
1929 (void) mld_sendpack(skb);
1930}
1931
1932static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1933{
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001934 struct net *net = dev_net(dev);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08001935 struct sock *sk = net->ipv6.igmp_sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 struct inet6_dev *idev;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001937 struct sk_buff *skb;
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001938 struct mld_msg *hdr;
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09001939 const struct in6_addr *snd_addr, *saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001940 struct in6_addr addr_buf;
Herbert Xua7ae1992011-11-18 02:20:04 +00001941 int hlen = LL_RESERVED_SPACE(dev);
1942 int tlen = dev->needed_tailroom;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001943 int err, len, payload_len, full_len;
1944 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1945 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1946 IPV6_TLV_PADN, 0 };
David S. Miller4c9483b2011-03-12 16:22:43 -05001947 struct flowi6 fl6;
Eric Dumazetadf30902009-06-02 05:19:30 +00001948 struct dst_entry *dst;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +09001950 if (type == ICMPV6_MGM_REDUCTION)
1951 snd_addr = &in6addr_linklocal_allrouters;
1952 else
1953 snd_addr = addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001954
1955 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1956 payload_len = len + sizeof(ra);
1957 full_len = sizeof(struct ipv6hdr) + payload_len;
1958
Neil Hormanedf391f2009-04-27 02:45:02 -07001959 rcu_read_lock();
1960 IP6_UPD_PO_STATS(net, __in6_dev_get(dev),
1961 IPSTATS_MIB_OUT, full_len);
1962 rcu_read_unlock();
1963
Herbert Xua7ae1992011-11-18 02:20:04 +00001964 skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965
1966 if (skb == NULL) {
YOSHIFUJI Hideakia11d2062006-11-04 20:11:37 +09001967 rcu_read_lock();
Denis V. Lunev3bd653c2008-10-08 10:54:51 -07001968 IP6_INC_STATS(net, __in6_dev_get(dev),
YOSHIFUJI Hideakia11d2062006-11-04 20:11:37 +09001969 IPSTATS_MIB_OUTDISCARDS);
1970 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001971 return;
1972 }
Hannes Frederic Sowa9d4a0312013-07-26 17:05:16 +02001973 skb->priority = TC_PRIO_CONTROL;
Herbert Xua7ae1992011-11-18 02:20:04 +00001974 skb_reserve(skb, hlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001975
Neil Horman95c385b2007-04-25 17:08:10 -07001976 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977 /* <draft-ietf-magma-mld-source-05.txt>:
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001978 * use unspecified address as the source address
Linus Torvalds1da177e2005-04-16 15:20:36 -07001979 * when a valid link-local address is not available.
1980 */
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09001981 saddr = &in6addr_any;
1982 } else
1983 saddr = &addr_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001984
YOSHIFUJI Hideaki / 吉藤英明2576f172013-01-21 06:48:19 +00001985 ip6_mc_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001986
1987 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1988
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001989 hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg));
1990 memset(hdr, 0, sizeof(struct mld_msg));
1991 hdr->mld_type = type;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001992 hdr->mld_mca = *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001993
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001994 hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len,
1995 IPPROTO_ICMPV6,
1996 csum_partial(hdr, len, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001997
Eric Dumazet96b52e62010-06-07 21:05:02 +00001998 rcu_read_lock();
1999 idev = __in6_dev_get(skb->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002000
David S. Miller4c9483b2011-03-12 16:22:43 -05002001 icmpv6_flow_init(sk, &fl6, type,
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08002002 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
2003 skb->dev->ifindex);
YOSHIFUJI Hideaki / 吉藤英明12fd84f2013-01-18 02:00:24 +00002004 dst = icmp6_dst_alloc(skb->dev, &fl6);
David S. Miller452edd52011-03-02 13:27:41 -08002005 if (IS_ERR(dst)) {
2006 err = PTR_ERR(dst);
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08002007 goto err_out;
David S. Miller452edd52011-03-02 13:27:41 -08002008 }
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08002009
Eric Dumazetadf30902009-06-02 05:19:30 +00002010 skb_dst_set(skb, dst);
Jan Engelhardtb2e0b382010-03-23 04:09:07 +01002011 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08002012 dst_output);
2013out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002014 if (!err) {
Denis V. Lunev5c5d2442008-10-08 10:33:50 -07002015 ICMP6MSGOUT_INC_STATS(net, idev, type);
Denis V. Luneva862f6a2008-10-08 10:33:06 -07002016 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
Neil Hormanedf391f2009-04-27 02:45:02 -07002017 IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002018 } else
Denis V. Lunev3bd653c2008-10-08 10:54:51 -07002019 IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002020
Eric Dumazet96b52e62010-06-07 21:05:02 +00002021 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002022 return;
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08002023
2024err_out:
2025 kfree_skb(skb);
2026 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002027}
2028
Flavio Leitner6a7cc412014-01-16 19:27:59 -02002029static void mld_send_initial_cr(struct inet6_dev *idev)
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02002030{
Flavio Leitner6a7cc412014-01-16 19:27:59 -02002031 struct sk_buff *skb;
2032 struct ifmcaddr6 *pmc;
2033 int type;
2034
2035 if (mld_in_v1_mode(idev))
2036 return;
2037
2038 skb = NULL;
2039 read_lock_bh(&idev->lock);
Ian Morris67ba4152014-08-24 21:53:10 +01002040 for (pmc = idev->mc_list; pmc; pmc = pmc->next) {
Flavio Leitner6a7cc412014-01-16 19:27:59 -02002041 spin_lock_bh(&pmc->mca_lock);
2042 if (pmc->mca_sfcount[MCAST_EXCLUDE])
2043 type = MLD2_CHANGE_TO_EXCLUDE;
2044 else
2045 type = MLD2_CHANGE_TO_INCLUDE;
2046 skb = add_grec(skb, pmc, type, 0, 0, 1);
2047 spin_unlock_bh(&pmc->mca_lock);
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02002048 }
Flavio Leitner6a7cc412014-01-16 19:27:59 -02002049 read_unlock_bh(&idev->lock);
2050 if (skb)
2051 mld_sendpack(skb);
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02002052}
2053
2054void ipv6_mc_dad_complete(struct inet6_dev *idev)
2055{
2056 idev->mc_dad_count = idev->mc_qrv;
2057 if (idev->mc_dad_count) {
Flavio Leitner6a7cc412014-01-16 19:27:59 -02002058 mld_send_initial_cr(idev);
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02002059 idev->mc_dad_count--;
2060 if (idev->mc_dad_count)
2061 mld_dad_start_timer(idev, idev->mc_maxdelay);
2062 }
2063}
2064
2065static void mld_dad_timer_expire(unsigned long data)
2066{
2067 struct inet6_dev *idev = (struct inet6_dev *)data;
2068
Flavio Leitner6a7cc412014-01-16 19:27:59 -02002069 mld_send_initial_cr(idev);
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02002070 if (idev->mc_dad_count) {
2071 idev->mc_dad_count--;
2072 if (idev->mc_dad_count)
2073 mld_dad_start_timer(idev, idev->mc_maxdelay);
2074 }
Salam Noureddine9260d3e2013-09-29 13:41:34 -07002075 in6_dev_put(idev);
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02002076}
2077
Linus Torvalds1da177e2005-04-16 15:20:36 -07002078static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002079 const struct in6_addr *psfsrc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002080{
2081 struct ip6_sf_list *psf, *psf_prev;
2082 int rv = 0;
2083
2084 psf_prev = NULL;
Ian Morris67ba4152014-08-24 21:53:10 +01002085 for (psf = pmc->mca_sources; psf; psf = psf->sf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002086 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
2087 break;
2088 psf_prev = psf;
2089 }
2090 if (!psf || psf->sf_count[sfmode] == 0) {
2091 /* source filter not found, or count wrong => bug */
2092 return -ESRCH;
2093 }
2094 psf->sf_count[sfmode]--;
2095 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
2096 struct inet6_dev *idev = pmc->idev;
2097
2098 /* no more filters for this source */
2099 if (psf_prev)
2100 psf_prev->sf_next = psf->sf_next;
2101 else
2102 pmc->mca_sources = psf->sf_next;
2103 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
Daniel Borkmann6c567b72013-09-04 00:19:38 +02002104 !mld_in_v1_mode(idev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002105 psf->sf_crcount = idev->mc_qrv;
2106 psf->sf_next = pmc->mca_tomb;
2107 pmc->mca_tomb = psf;
2108 rv = 1;
2109 } else
2110 kfree(psf);
2111 }
2112 return rv;
2113}
2114
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002115static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
2116 int sfmode, int sfcount, const struct in6_addr *psfsrc,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117 int delta)
2118{
2119 struct ifmcaddr6 *pmc;
2120 int changerec = 0;
2121 int i, err;
2122
2123 if (!idev)
2124 return -ENODEV;
2125 read_lock_bh(&idev->lock);
Ian Morris67ba4152014-08-24 21:53:10 +01002126 for (pmc = idev->mc_list; pmc; pmc = pmc->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002127 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2128 break;
2129 }
2130 if (!pmc) {
2131 /* MCA not found?? bug */
2132 read_unlock_bh(&idev->lock);
2133 return -ESRCH;
2134 }
2135 spin_lock_bh(&pmc->mca_lock);
2136 sf_markstate(pmc);
2137 if (!delta) {
2138 if (!pmc->mca_sfcount[sfmode]) {
2139 spin_unlock_bh(&pmc->mca_lock);
2140 read_unlock_bh(&idev->lock);
2141 return -EINVAL;
2142 }
2143 pmc->mca_sfcount[sfmode]--;
2144 }
2145 err = 0;
Ian Morris67ba4152014-08-24 21:53:10 +01002146 for (i = 0; i < sfcount; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002147 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
2148
2149 changerec |= rv > 0;
2150 if (!err && rv < 0)
2151 err = rv;
2152 }
2153 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
2154 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
2155 pmc->mca_sfcount[MCAST_INCLUDE]) {
2156 struct ip6_sf_list *psf;
2157
2158 /* filter mode change */
2159 pmc->mca_sfmode = MCAST_INCLUDE;
2160 pmc->mca_crcount = idev->mc_qrv;
2161 idev->mc_ifc_count = pmc->mca_crcount;
Ian Morris67ba4152014-08-24 21:53:10 +01002162 for (psf = pmc->mca_sources; psf; psf = psf->sf_next)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002163 psf->sf_crcount = 0;
2164 mld_ifc_event(pmc->idev);
2165 } else if (sf_setstate(pmc) || changerec)
2166 mld_ifc_event(pmc->idev);
2167 spin_unlock_bh(&pmc->mca_lock);
2168 read_unlock_bh(&idev->lock);
2169 return err;
2170}
2171
2172/*
2173 * Add multicast single-source filter to the interface list
2174 */
2175static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
Jun Zhao99d2f472011-11-30 06:21:05 +00002176 const struct in6_addr *psfsrc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002177{
2178 struct ip6_sf_list *psf, *psf_prev;
2179
2180 psf_prev = NULL;
Ian Morris67ba4152014-08-24 21:53:10 +01002181 for (psf = pmc->mca_sources; psf; psf = psf->sf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002182 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
2183 break;
2184 psf_prev = psf;
2185 }
2186 if (!psf) {
Ingo Oeser0c600ed2006-03-20 23:01:32 -08002187 psf = kzalloc(sizeof(*psf), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002188 if (!psf)
2189 return -ENOBUFS;
Ingo Oeser0c600ed2006-03-20 23:01:32 -08002190
Linus Torvalds1da177e2005-04-16 15:20:36 -07002191 psf->sf_addr = *psfsrc;
2192 if (psf_prev) {
2193 psf_prev->sf_next = psf;
2194 } else
2195 pmc->mca_sources = psf;
2196 }
2197 psf->sf_count[sfmode]++;
2198 return 0;
2199}
2200
2201static void sf_markstate(struct ifmcaddr6 *pmc)
2202{
2203 struct ip6_sf_list *psf;
2204 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
2205
Ian Morris67ba4152014-08-24 21:53:10 +01002206 for (psf = pmc->mca_sources; psf; psf = psf->sf_next)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002207 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
2208 psf->sf_oldin = mca_xcount ==
2209 psf->sf_count[MCAST_EXCLUDE] &&
2210 !psf->sf_count[MCAST_INCLUDE];
2211 } else
2212 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
2213}
2214
2215static int sf_setstate(struct ifmcaddr6 *pmc)
2216{
David L Stevens7add2a42006-01-24 13:06:39 -08002217 struct ip6_sf_list *psf, *dpsf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002218 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
2219 int qrv = pmc->idev->mc_qrv;
2220 int new_in, rv;
2221
2222 rv = 0;
Ian Morris67ba4152014-08-24 21:53:10 +01002223 for (psf = pmc->mca_sources; psf; psf = psf->sf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
2225 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
2226 !psf->sf_count[MCAST_INCLUDE];
2227 } else
2228 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
David L Stevens7add2a42006-01-24 13:06:39 -08002229 if (new_in) {
2230 if (!psf->sf_oldin) {
Al Viroe80e28b2006-02-03 20:10:03 -05002231 struct ip6_sf_list *prev = NULL;
David L Stevens7add2a42006-01-24 13:06:39 -08002232
Ian Morris67ba4152014-08-24 21:53:10 +01002233 for (dpsf = pmc->mca_tomb; dpsf;
2234 dpsf = dpsf->sf_next) {
David L Stevens7add2a42006-01-24 13:06:39 -08002235 if (ipv6_addr_equal(&dpsf->sf_addr,
2236 &psf->sf_addr))
2237 break;
2238 prev = dpsf;
2239 }
2240 if (dpsf) {
2241 if (prev)
2242 prev->sf_next = dpsf->sf_next;
2243 else
2244 pmc->mca_tomb = dpsf->sf_next;
2245 kfree(dpsf);
2246 }
2247 psf->sf_crcount = qrv;
2248 rv++;
2249 }
2250 } else if (psf->sf_oldin) {
2251 psf->sf_crcount = 0;
2252 /*
2253 * add or update "delete" records if an active filter
2254 * is now inactive
2255 */
Ian Morris67ba4152014-08-24 21:53:10 +01002256 for (dpsf = pmc->mca_tomb; dpsf; dpsf = dpsf->sf_next)
David L Stevens7add2a42006-01-24 13:06:39 -08002257 if (ipv6_addr_equal(&dpsf->sf_addr,
2258 &psf->sf_addr))
2259 break;
2260 if (!dpsf) {
Joe Perches5d553542010-05-31 17:23:22 +00002261 dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC);
David L Stevens7add2a42006-01-24 13:06:39 -08002262 if (!dpsf)
2263 continue;
2264 *dpsf = *psf;
2265 /* pmc->mca_lock held by callers */
2266 dpsf->sf_next = pmc->mca_tomb;
2267 pmc->mca_tomb = dpsf;
2268 }
2269 dpsf->sf_crcount = qrv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002270 rv++;
2271 }
2272 }
2273 return rv;
2274}
2275
2276/*
2277 * Add multicast source filter list to the interface list
2278 */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002279static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
2280 int sfmode, int sfcount, const struct in6_addr *psfsrc,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281 int delta)
2282{
2283 struct ifmcaddr6 *pmc;
2284 int isexclude;
2285 int i, err;
2286
2287 if (!idev)
2288 return -ENODEV;
2289 read_lock_bh(&idev->lock);
Ian Morris67ba4152014-08-24 21:53:10 +01002290 for (pmc = idev->mc_list; pmc; pmc = pmc->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002291 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2292 break;
2293 }
2294 if (!pmc) {
2295 /* MCA not found?? bug */
2296 read_unlock_bh(&idev->lock);
2297 return -ESRCH;
2298 }
2299 spin_lock_bh(&pmc->mca_lock);
2300
2301 sf_markstate(pmc);
2302 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
2303 if (!delta)
2304 pmc->mca_sfcount[sfmode]++;
2305 err = 0;
Ian Morris67ba4152014-08-24 21:53:10 +01002306 for (i = 0; i < sfcount; i++) {
Jun Zhao99d2f472011-11-30 06:21:05 +00002307 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002308 if (err)
2309 break;
2310 }
2311 if (err) {
2312 int j;
2313
2314 if (!delta)
2315 pmc->mca_sfcount[sfmode]--;
Ian Morris67ba4152014-08-24 21:53:10 +01002316 for (j = 0; j < i; j++)
RongQing.Li78d50212012-04-04 16:47:04 +00002317 ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002318 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002319 struct ip6_sf_list *psf;
2320
2321 /* filter mode change */
2322 if (pmc->mca_sfcount[MCAST_EXCLUDE])
2323 pmc->mca_sfmode = MCAST_EXCLUDE;
2324 else if (pmc->mca_sfcount[MCAST_INCLUDE])
2325 pmc->mca_sfmode = MCAST_INCLUDE;
2326 /* else no filters; keep old mode for reports */
2327
2328 pmc->mca_crcount = idev->mc_qrv;
2329 idev->mc_ifc_count = pmc->mca_crcount;
Ian Morris67ba4152014-08-24 21:53:10 +01002330 for (psf = pmc->mca_sources; psf; psf = psf->sf_next)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002331 psf->sf_crcount = 0;
2332 mld_ifc_event(idev);
2333 } else if (sf_setstate(pmc))
2334 mld_ifc_event(idev);
2335 spin_unlock_bh(&pmc->mca_lock);
2336 read_unlock_bh(&idev->lock);
2337 return err;
2338}
2339
2340static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
2341{
2342 struct ip6_sf_list *psf, *nextpsf;
2343
Ian Morris67ba4152014-08-24 21:53:10 +01002344 for (psf = pmc->mca_tomb; psf; psf = nextpsf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002345 nextpsf = psf->sf_next;
2346 kfree(psf);
2347 }
2348 pmc->mca_tomb = NULL;
Ian Morris67ba4152014-08-24 21:53:10 +01002349 for (psf = pmc->mca_sources; psf; psf = nextpsf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002350 nextpsf = psf->sf_next;
2351 kfree(psf);
2352 }
2353 pmc->mca_sources = NULL;
2354 pmc->mca_sfmode = MCAST_EXCLUDE;
Denis Lukianovde9daad2005-09-14 20:53:42 -07002355 pmc->mca_sfcount[MCAST_INCLUDE] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002356 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
2357}
2358
2359
2360static void igmp6_join_group(struct ifmcaddr6 *ma)
2361{
2362 unsigned long delay;
2363
2364 if (ma->mca_flags & MAF_NOREPORT)
2365 return;
2366
2367 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2368
Aruna-Hewapathirane63862b52014-01-11 07:15:59 -05002369 delay = prandom_u32() % unsolicited_report_interval(ma->idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002370
2371 spin_lock_bh(&ma->mca_lock);
2372 if (del_timer(&ma->mca_timer)) {
2373 atomic_dec(&ma->mca_refcnt);
2374 delay = ma->mca_timer.expires - jiffies;
2375 }
2376
2377 if (!mod_timer(&ma->mca_timer, jiffies + delay))
2378 atomic_inc(&ma->mca_refcnt);
2379 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
2380 spin_unlock_bh(&ma->mca_lock);
2381}
2382
2383static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
2384 struct inet6_dev *idev)
2385{
2386 int err;
2387
WANG Congf7ed9252014-09-11 15:35:15 -07002388 /* callers have the socket lock and rtnl lock
David L Stevens5ab4a6c2005-12-27 14:03:00 -08002389 * so no other readers or writers of iml or its sflist
2390 */
Stephen Hemmingercfcabdc2007-10-09 01:59:42 -07002391 if (!iml->sflist) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002392 /* any-source empty exclude case */
2393 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
2394 }
2395 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
2396 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
2397 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
2398 iml->sflist = NULL;
2399 return err;
2400}
2401
2402static void igmp6_leave_group(struct ifmcaddr6 *ma)
2403{
Daniel Borkmann6c567b72013-09-04 00:19:38 +02002404 if (mld_in_v1_mode(ma->idev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002405 if (ma->mca_flags & MAF_LAST_REPORTER)
2406 igmp6_send(&ma->mca_addr, ma->idev->dev,
2407 ICMPV6_MGM_REDUCTION);
2408 } else {
2409 mld_add_delrec(ma->idev, ma);
2410 mld_ifc_event(ma->idev);
2411 }
2412}
2413
2414static void mld_gq_timer_expire(unsigned long data)
2415{
2416 struct inet6_dev *idev = (struct inet6_dev *)data;
2417
2418 idev->mc_gq_running = 0;
2419 mld_send_report(idev, NULL);
Salam Noureddine9260d3e2013-09-29 13:41:34 -07002420 in6_dev_put(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002421}
2422
2423static void mld_ifc_timer_expire(unsigned long data)
2424{
2425 struct inet6_dev *idev = (struct inet6_dev *)data;
2426
2427 mld_send_cr(idev);
2428 if (idev->mc_ifc_count) {
2429 idev->mc_ifc_count--;
2430 if (idev->mc_ifc_count)
2431 mld_ifc_start_timer(idev, idev->mc_maxdelay);
2432 }
Salam Noureddine9260d3e2013-09-29 13:41:34 -07002433 in6_dev_put(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002434}
2435
2436static void mld_ifc_event(struct inet6_dev *idev)
2437{
Daniel Borkmann6c567b72013-09-04 00:19:38 +02002438 if (mld_in_v1_mode(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002439 return;
2440 idev->mc_ifc_count = idev->mc_qrv;
2441 mld_ifc_start_timer(idev, 1);
2442}
2443
2444
2445static void igmp6_timer_handler(unsigned long data)
2446{
2447 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
2448
Daniel Borkmann6c567b72013-09-04 00:19:38 +02002449 if (mld_in_v1_mode(ma->idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002450 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2451 else
2452 mld_send_report(ma->idev, ma);
2453
2454 spin_lock(&ma->mca_lock);
2455 ma->mca_flags |= MAF_LAST_REPORTER;
2456 ma->mca_flags &= ~MAF_TIMER_RUNNING;
2457 spin_unlock(&ma->mca_lock);
2458 ma_put(ma);
2459}
2460
Moni Shoua75c78502009-09-15 02:37:40 -07002461/* Device changing type */
2462
2463void ipv6_mc_unmap(struct inet6_dev *idev)
2464{
2465 struct ifmcaddr6 *i;
2466
2467 /* Install multicast list, except for all-nodes (already installed) */
2468
2469 read_lock_bh(&idev->lock);
2470 for (i = idev->mc_list; i; i = i->next)
2471 igmp6_group_dropped(i);
2472 read_unlock_bh(&idev->lock);
2473}
2474
2475void ipv6_mc_remap(struct inet6_dev *idev)
2476{
2477 ipv6_mc_up(idev);
2478}
2479
Linus Torvalds1da177e2005-04-16 15:20:36 -07002480/* Device going down */
2481
2482void ipv6_mc_down(struct inet6_dev *idev)
2483{
2484 struct ifmcaddr6 *i;
2485
2486 /* Withdraw multicast list */
2487
2488 read_lock_bh(&idev->lock);
Daniel Borkmannb4af8de2013-09-04 00:19:43 +02002489 mld_ifc_stop_timer(idev);
2490 mld_gq_stop_timer(idev);
2491 mld_dad_stop_timer(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002492
Ian Morris67ba4152014-08-24 21:53:10 +01002493 for (i = idev->mc_list; i; i = i->next)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002494 igmp6_group_dropped(i);
2495 read_unlock_bh(&idev->lock);
2496
2497 mld_clear_delrec(idev);
2498}
2499
Hannes Frederic Sowa2f711932014-09-02 15:49:25 +02002500static void ipv6_mc_reset(struct inet6_dev *idev)
2501{
2502 idev->mc_qrv = sysctl_mld_qrv;
2503 idev->mc_qi = MLD_QI_DEFAULT;
2504 idev->mc_qri = MLD_QRI_DEFAULT;
2505 idev->mc_v1_seen = 0;
2506 idev->mc_maxdelay = unsolicited_report_interval(idev);
2507}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002508
2509/* Device going up */
2510
2511void ipv6_mc_up(struct inet6_dev *idev)
2512{
2513 struct ifmcaddr6 *i;
2514
2515 /* Install multicast list, except for all-nodes (already installed) */
2516
2517 read_lock_bh(&idev->lock);
Hannes Frederic Sowa2f711932014-09-02 15:49:25 +02002518 ipv6_mc_reset(idev);
Ian Morris67ba4152014-08-24 21:53:10 +01002519 for (i = idev->mc_list; i; i = i->next)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002520 igmp6_group_added(i);
2521 read_unlock_bh(&idev->lock);
2522}
2523
2524/* IPv6 device initialization. */
2525
2526void ipv6_mc_init_dev(struct inet6_dev *idev)
2527{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002528 write_lock_bh(&idev->lock);
Stephen Hemminger6457d262010-02-17 18:48:44 -08002529 spin_lock_init(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002530 idev->mc_gq_running = 0;
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -08002531 setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire,
2532 (unsigned long)idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002533 idev->mc_tomb = NULL;
2534 idev->mc_ifc_count = 0;
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -08002535 setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire,
2536 (unsigned long)idev);
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02002537 setup_timer(&idev->mc_dad_timer, mld_dad_timer_expire,
2538 (unsigned long)idev);
Hannes Frederic Sowa2f711932014-09-02 15:49:25 +02002539 ipv6_mc_reset(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002540 write_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002541}
2542
2543/*
2544 * Device is about to be destroyed: clean up.
2545 */
2546
2547void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2548{
2549 struct ifmcaddr6 *i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002550
2551 /* Deactivate timers */
2552 ipv6_mc_down(idev);
2553
2554 /* Delete all-nodes address. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002555 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2556 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2557 * fail.
2558 */
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +09002559 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002560
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +09002561 if (idev->cnf.forwarding)
2562 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002563
2564 write_lock_bh(&idev->lock);
2565 while ((i = idev->mc_list) != NULL) {
2566 idev->mc_list = i->next;
2567 write_unlock_bh(&idev->lock);
2568
2569 igmp6_group_dropped(i);
2570 ma_put(i);
2571
2572 write_lock_bh(&idev->lock);
2573 }
2574 write_unlock_bh(&idev->lock);
2575}
2576
2577#ifdef CONFIG_PROC_FS
2578struct igmp6_mc_iter_state {
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002579 struct seq_net_private p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002580 struct net_device *dev;
2581 struct inet6_dev *idev;
2582};
2583
2584#define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2585
2586static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
2587{
2588 struct ifmcaddr6 *im = NULL;
2589 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09002590 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002591
Pavel Emelianov7562f872007-05-03 15:13:45 -07002592 state->idev = NULL;
Eric Dumazetce81b762009-11-11 17:34:30 +00002593 for_each_netdev_rcu(net, state->dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002594 struct inet6_dev *idev;
Eric Dumazetce81b762009-11-11 17:34:30 +00002595 idev = __in6_dev_get(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002596 if (!idev)
2597 continue;
2598 read_lock_bh(&idev->lock);
2599 im = idev->mc_list;
2600 if (im) {
2601 state->idev = idev;
2602 break;
2603 }
2604 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002605 }
2606 return im;
2607}
2608
2609static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
2610{
2611 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2612
2613 im = im->next;
2614 while (!im) {
Eric Dumazetce81b762009-11-11 17:34:30 +00002615 if (likely(state->idev != NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002616 read_unlock_bh(&state->idev->lock);
Eric Dumazetce81b762009-11-11 17:34:30 +00002617
2618 state->dev = next_net_device_rcu(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002619 if (!state->dev) {
2620 state->idev = NULL;
2621 break;
2622 }
Eric Dumazetce81b762009-11-11 17:34:30 +00002623 state->idev = __in6_dev_get(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002624 if (!state->idev)
2625 continue;
2626 read_lock_bh(&state->idev->lock);
2627 im = state->idev->mc_list;
2628 }
2629 return im;
2630}
2631
2632static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2633{
2634 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2635 if (im)
2636 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2637 --pos;
2638 return pos ? NULL : im;
2639}
2640
2641static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazetce81b762009-11-11 17:34:30 +00002642 __acquires(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002643{
Eric Dumazetce81b762009-11-11 17:34:30 +00002644 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002645 return igmp6_mc_get_idx(seq, *pos);
2646}
2647
2648static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2649{
Eric Dumazetce81b762009-11-11 17:34:30 +00002650 struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v);
2651
Linus Torvalds1da177e2005-04-16 15:20:36 -07002652 ++*pos;
2653 return im;
2654}
2655
2656static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
Eric Dumazetce81b762009-11-11 17:34:30 +00002657 __releases(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002658{
2659 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
Eric Dumazetce81b762009-11-11 17:34:30 +00002660
Linus Torvalds1da177e2005-04-16 15:20:36 -07002661 if (likely(state->idev != NULL)) {
2662 read_unlock_bh(&state->idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002663 state->idev = NULL;
2664 }
2665 state->dev = NULL;
Eric Dumazetce81b762009-11-11 17:34:30 +00002666 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002667}
2668
2669static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
2670{
2671 struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
2672 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2673
2674 seq_printf(seq,
Harvey Harrison4b7a4272008-10-29 12:50:24 -07002675 "%-4d %-15s %pi6 %5d %08X %ld\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002676 state->dev->ifindex, state->dev->name,
Harvey Harrisonb0711952008-10-28 16:05:40 -07002677 &im->mca_addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002678 im->mca_users, im->mca_flags,
2679 (im->mca_flags&MAF_TIMER_RUNNING) ?
2680 jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
2681 return 0;
2682}
2683
Philippe De Muyter56b3d972007-07-10 23:07:31 -07002684static const struct seq_operations igmp6_mc_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002685 .start = igmp6_mc_seq_start,
2686 .next = igmp6_mc_seq_next,
2687 .stop = igmp6_mc_seq_stop,
2688 .show = igmp6_mc_seq_show,
2689};
2690
2691static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
2692{
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002693 return seq_open_net(inode, file, &igmp6_mc_seq_ops,
2694 sizeof(struct igmp6_mc_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002695}
2696
Arjan van de Ven9a321442007-02-12 00:55:35 -08002697static const struct file_operations igmp6_mc_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002698 .owner = THIS_MODULE,
2699 .open = igmp6_mc_seq_open,
2700 .read = seq_read,
2701 .llseek = seq_lseek,
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002702 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002703};
2704
2705struct igmp6_mcf_iter_state {
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002706 struct seq_net_private p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002707 struct net_device *dev;
2708 struct inet6_dev *idev;
2709 struct ifmcaddr6 *im;
2710};
2711
2712#define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2713
2714static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
2715{
2716 struct ip6_sf_list *psf = NULL;
2717 struct ifmcaddr6 *im = NULL;
2718 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09002719 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002720
Pavel Emelianov7562f872007-05-03 15:13:45 -07002721 state->idev = NULL;
2722 state->im = NULL;
Eric Dumazetce81b762009-11-11 17:34:30 +00002723 for_each_netdev_rcu(net, state->dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002724 struct inet6_dev *idev;
Eric Dumazetce81b762009-11-11 17:34:30 +00002725 idev = __in6_dev_get(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002726 if (unlikely(idev == NULL))
2727 continue;
2728 read_lock_bh(&idev->lock);
2729 im = idev->mc_list;
2730 if (likely(im != NULL)) {
2731 spin_lock_bh(&im->mca_lock);
2732 psf = im->mca_sources;
2733 if (likely(psf != NULL)) {
2734 state->im = im;
2735 state->idev = idev;
2736 break;
2737 }
2738 spin_unlock_bh(&im->mca_lock);
2739 }
2740 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002741 }
2742 return psf;
2743}
2744
2745static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
2746{
2747 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2748
2749 psf = psf->sf_next;
2750 while (!psf) {
2751 spin_unlock_bh(&state->im->mca_lock);
2752 state->im = state->im->next;
2753 while (!state->im) {
Eric Dumazetce81b762009-11-11 17:34:30 +00002754 if (likely(state->idev != NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002755 read_unlock_bh(&state->idev->lock);
Eric Dumazetce81b762009-11-11 17:34:30 +00002756
2757 state->dev = next_net_device_rcu(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002758 if (!state->dev) {
2759 state->idev = NULL;
2760 goto out;
2761 }
Eric Dumazetce81b762009-11-11 17:34:30 +00002762 state->idev = __in6_dev_get(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002763 if (!state->idev)
2764 continue;
2765 read_lock_bh(&state->idev->lock);
2766 state->im = state->idev->mc_list;
2767 }
2768 if (!state->im)
2769 break;
2770 spin_lock_bh(&state->im->mca_lock);
2771 psf = state->im->mca_sources;
2772 }
2773out:
2774 return psf;
2775}
2776
2777static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2778{
2779 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2780 if (psf)
2781 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2782 --pos;
2783 return pos ? NULL : psf;
2784}
2785
2786static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazetce81b762009-11-11 17:34:30 +00002787 __acquires(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002788{
Eric Dumazetce81b762009-11-11 17:34:30 +00002789 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002790 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2791}
2792
2793static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2794{
2795 struct ip6_sf_list *psf;
2796 if (v == SEQ_START_TOKEN)
2797 psf = igmp6_mcf_get_first(seq);
2798 else
2799 psf = igmp6_mcf_get_next(seq, v);
2800 ++*pos;
2801 return psf;
2802}
2803
2804static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
Eric Dumazetce81b762009-11-11 17:34:30 +00002805 __releases(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002806{
2807 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2808 if (likely(state->im != NULL)) {
2809 spin_unlock_bh(&state->im->mca_lock);
2810 state->im = NULL;
2811 }
2812 if (likely(state->idev != NULL)) {
2813 read_unlock_bh(&state->idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002814 state->idev = NULL;
2815 }
2816 state->dev = NULL;
Eric Dumazetce81b762009-11-11 17:34:30 +00002817 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002818}
2819
2820static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
2821{
2822 struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
2823 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2824
2825 if (v == SEQ_START_TOKEN) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09002826 seq_printf(seq,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002827 "%3s %6s "
YOSHIFUJI Hideaki9343e792006-01-17 02:10:53 -08002828 "%32s %32s %6s %6s\n", "Idx",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002829 "Device", "Multicast Address",
2830 "Source Address", "INC", "EXC");
2831 } else {
2832 seq_printf(seq,
Harvey Harrison4b7a4272008-10-29 12:50:24 -07002833 "%3d %6.6s %pi6 %pi6 %6lu %6lu\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002834 state->dev->ifindex, state->dev->name,
Harvey Harrisonb0711952008-10-28 16:05:40 -07002835 &state->im->mca_addr,
2836 &psf->sf_addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002837 psf->sf_count[MCAST_INCLUDE],
2838 psf->sf_count[MCAST_EXCLUDE]);
2839 }
2840 return 0;
2841}
2842
Philippe De Muyter56b3d972007-07-10 23:07:31 -07002843static const struct seq_operations igmp6_mcf_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002844 .start = igmp6_mcf_seq_start,
2845 .next = igmp6_mcf_seq_next,
2846 .stop = igmp6_mcf_seq_stop,
2847 .show = igmp6_mcf_seq_show,
2848};
2849
2850static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
2851{
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002852 return seq_open_net(inode, file, &igmp6_mcf_seq_ops,
2853 sizeof(struct igmp6_mcf_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002854}
2855
Arjan van de Ven9a321442007-02-12 00:55:35 -08002856static const struct file_operations igmp6_mcf_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002857 .owner = THIS_MODULE,
2858 .open = igmp6_mcf_seq_open,
2859 .read = seq_read,
2860 .llseek = seq_lseek,
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002861 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002862};
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002863
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002864static int __net_init igmp6_proc_init(struct net *net)
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002865{
2866 int err;
2867
2868 err = -ENOMEM;
Gao fengd4beaa62013-02-18 01:34:54 +00002869 if (!proc_create("igmp6", S_IRUGO, net->proc_net, &igmp6_mc_seq_fops))
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002870 goto out;
Gao fengd4beaa62013-02-18 01:34:54 +00002871 if (!proc_create("mcfilter6", S_IRUGO, net->proc_net,
2872 &igmp6_mcf_seq_fops))
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002873 goto out_proc_net_igmp6;
2874
2875 err = 0;
2876out:
2877 return err;
2878
2879out_proc_net_igmp6:
Gao fengece31ff2013-02-18 01:34:56 +00002880 remove_proc_entry("igmp6", net->proc_net);
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002881 goto out;
2882}
2883
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002884static void __net_exit igmp6_proc_exit(struct net *net)
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002885{
Gao fengece31ff2013-02-18 01:34:56 +00002886 remove_proc_entry("mcfilter6", net->proc_net);
2887 remove_proc_entry("igmp6", net->proc_net);
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002888}
2889#else
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002890static inline int igmp6_proc_init(struct net *net)
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002891{
2892 return 0;
2893}
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002894static inline void igmp6_proc_exit(struct net *net)
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002895{
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002896}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002897#endif
2898
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002899static int __net_init igmp6_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002900{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002901 int err;
2902
Denis V. Lunev1ed85162008-04-03 14:31:03 -07002903 err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6,
2904 SOCK_RAW, IPPROTO_ICMPV6, net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002905 if (err < 0) {
Joe Perchesf3213832012-05-15 14:11:53 +00002906 pr_err("Failed to initialize the IGMP6 control socket (err %d)\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002907 err);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002908 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002909 }
2910
Denis V. Lunev1ed85162008-04-03 14:31:03 -07002911 inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002912
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002913 err = igmp6_proc_init(net);
2914 if (err)
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002915 goto out_sock_create;
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002916out:
2917 return err;
2918
2919out_sock_create:
Denis V. Lunev1ed85162008-04-03 14:31:03 -07002920 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002921 goto out;
2922}
2923
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002924static void __net_exit igmp6_net_exit(struct net *net)
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002925{
Denis V. Lunev1ed85162008-04-03 14:31:03 -07002926 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002927 igmp6_proc_exit(net);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002928}
2929
2930static struct pernet_operations igmp6_net_ops = {
2931 .init = igmp6_net_init,
2932 .exit = igmp6_net_exit,
2933};
2934
2935int __init igmp6_init(void)
2936{
2937 return register_pernet_subsys(&igmp6_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002938}
2939
2940void igmp6_cleanup(void)
2941{
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002942 unregister_pernet_subsys(&igmp6_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002943}