blob: 5ee56d0a8699e22434d5ad8b4380f890fa8d2126 [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
Marcelo Ricardo Leitner54ff9ef2015-03-18 14:50:43 -0300135int 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
Madhu Challa46a4dee2015-02-25 09:58:34 -0800143 ASSERT_RTNL();
144
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 if (!ipv6_addr_is_multicast(addr))
146 return -EINVAL;
147
Eric Dumazet456b61b2010-11-23 13:12:15 +0000148 rcu_read_lock();
149 for_each_pmc_rcu(np, mc_lst) {
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700150 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
151 ipv6_addr_equal(&mc_lst->addr, addr)) {
Eric Dumazet456b61b2010-11-23 13:12:15 +0000152 rcu_read_unlock();
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700153 return -EADDRINUSE;
154 }
155 }
Eric Dumazet456b61b2010-11-23 13:12:15 +0000156 rcu_read_unlock();
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
159
Ian Morris63159f22015-03-29 14:00:04 +0100160 if (!mc_lst)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 return -ENOMEM;
162
163 mc_lst->next = NULL;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000164 mc_lst->addr = *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
166 if (ifindex == 0) {
167 struct rt6_info *rt;
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -0800168 rt = rt6_lookup(net, addr, NULL, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 if (rt) {
David S. Millerd1918542011-12-28 20:19:20 -0500170 dev = rt->dst.dev;
Amerigo Wang94e187c2012-10-29 00:13:19 +0000171 ip6_rt_put(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 }
173 } else
WANG Cong414b6c92014-09-11 15:35:14 -0700174 dev = __dev_get_by_index(net, ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
Ian Morris63159f22015-03-29 14:00:04 +0100176 if (!dev) {
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) {
193 sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 return err;
195 }
196
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 mc_lst->next = np->ipv6_mc_list;
Eric Dumazet456b61b2010-11-23 13:12:15 +0000198 rcu_assign_pointer(np->ipv6_mc_list, mc_lst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 return 0;
201}
Madhu Challa46a4dee2015-02-25 09:58:34 -0800202EXPORT_SYMBOL(ipv6_sock_mc_join);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
204/*
205 * socket leave on multicast group
206 */
Marcelo Ricardo Leitner54ff9ef2015-03-18 14:50:43 -0300207int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208{
209 struct ipv6_pinfo *np = inet6_sk(sk);
Eric Dumazet456b61b2010-11-23 13:12:15 +0000210 struct ipv6_mc_socklist *mc_lst;
211 struct ipv6_mc_socklist __rcu **lnk;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900212 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
Madhu Challa46a4dee2015-02-25 09:58:34 -0800214 ASSERT_RTNL();
215
Li Weia858d642012-07-17 15:28:59 +0800216 if (!ipv6_addr_is_multicast(addr))
217 return -EINVAL;
218
Eric Dumazet456b61b2010-11-23 13:12:15 +0000219 for (lnk = &np->ipv6_mc_list;
WANG Congb5350912014-09-11 15:35:13 -0700220 (mc_lst = rtnl_dereference(*lnk)) != NULL;
Eric Dumazet456b61b2010-11-23 13:12:15 +0000221 lnk = &mc_lst->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
223 ipv6_addr_equal(&mc_lst->addr, addr)) {
224 struct net_device *dev;
225
226 *lnk = mc_lst->next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
WANG Cong414b6c92014-09-11 15:35:14 -0700228 dev = __dev_get_by_index(net, mc_lst->ifindex);
Ian Morris53b24b82015-03-29 14:00:05 +0100229 if (dev) {
Eric Dumazet96b52e62010-06-07 21:05:02 +0000230 struct inet6_dev *idev = __in6_dev_get(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
David L Stevensacd6e002006-08-17 16:27:39 -0700232 (void) ip6_mc_leave_src(sk, mc_lst, idev);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000233 if (idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
David L Stevensacd6e002006-08-17 16:27:39 -0700235 } else
236 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +0200237
Eric Dumazet456b61b2010-11-23 13:12:15 +0000238 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
Lai Jiangshane3cbf282011-03-18 12:00:50 +0800239 kfree_rcu(mc_lst, rcu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 return 0;
241 }
242 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243
David L Stevens9951f032005-07-08 17:47:28 -0700244 return -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245}
Madhu Challa46a4dee2015-02-25 09:58:34 -0800246EXPORT_SYMBOL(ipv6_sock_mc_drop);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
Eric Dumazet96b52e62010-06-07 21:05:02 +0000248/* called with rcu_read_lock() */
249static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net,
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000250 const struct in6_addr *group,
Eric Dumazet96b52e62010-06-07 21:05:02 +0000251 int ifindex)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252{
253 struct net_device *dev = NULL;
254 struct inet6_dev *idev = NULL;
255
256 if (ifindex == 0) {
Eric Dumazet96b52e62010-06-07 21:05:02 +0000257 struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 if (rt) {
David S. Millerd1918542011-12-28 20:19:20 -0500260 dev = rt->dst.dev;
Amerigo Wang94e187c2012-10-29 00:13:19 +0000261 ip6_rt_put(rt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 }
263 } else
Eric Dumazet96b52e62010-06-07 21:05:02 +0000264 dev = dev_get_by_index_rcu(net, ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265
266 if (!dev)
Eric Dumazet96b52e62010-06-07 21:05:02 +0000267 return NULL;
268 idev = __in6_dev_get(dev);
Ilpo Järvinen448eb712008-12-14 23:15:21 -0800269 if (!idev)
Joe Perches8a22c992010-11-14 17:05:00 +0000270 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 read_lock_bh(&idev->lock);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000272 if (idev->dead) {
273 read_unlock_bh(&idev->lock);
274 return NULL;
275 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 return idev;
277}
278
279void ipv6_sock_mc_close(struct sock *sk)
280{
281 struct ipv6_pinfo *np = inet6_sk(sk);
282 struct ipv6_mc_socklist *mc_lst;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900283 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284
Eric Dumazet0e1efe92012-12-05 09:18:10 +0000285 if (!rcu_access_pointer(np->ipv6_mc_list))
286 return;
287
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +0200288 rtnl_lock();
WANG Congb5350912014-09-11 15:35:13 -0700289 while ((mc_lst = rtnl_dereference(np->ipv6_mc_list)) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 struct net_device *dev;
291
292 np->ipv6_mc_list = mc_lst->next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293
WANG Cong414b6c92014-09-11 15:35:14 -0700294 dev = __dev_get_by_index(net, mc_lst->ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 if (dev) {
Eric Dumazet96b52e62010-06-07 21:05:02 +0000296 struct inet6_dev *idev = __in6_dev_get(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297
David L Stevensacd6e002006-08-17 16:27:39 -0700298 (void) ip6_mc_leave_src(sk, mc_lst, idev);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000299 if (idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 __ipv6_dev_mc_dec(idev, &mc_lst->addr);
David L Stevensacd6e002006-08-17 16:27:39 -0700301 } else
302 (void) ip6_mc_leave_src(sk, mc_lst, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
Eric Dumazet456b61b2010-11-23 13:12:15 +0000304 atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
Lai Jiangshane3cbf282011-03-18 12:00:50 +0800305 kfree_rcu(mc_lst, rcu);
Eric Dumazet456b61b2010-11-23 13:12:15 +0000306
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 }
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +0200308 rtnl_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309}
310
311int ip6_mc_source(int add, int omode, struct sock *sk,
312 struct group_source_req *pgsr)
313{
314 struct in6_addr *source, *group;
315 struct ipv6_mc_socklist *pmc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 struct inet6_dev *idev;
317 struct ipv6_pinfo *inet6 = inet6_sk(sk);
318 struct ip6_sf_socklist *psl;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900319 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 int i, j, rv;
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700321 int leavegroup = 0;
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800322 int pmclocked = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 int err;
324
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
326 group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
327
328 if (!ipv6_addr_is_multicast(group))
329 return -EINVAL;
330
Eric Dumazet96b52e62010-06-07 21:05:02 +0000331 rcu_read_lock();
332 idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface);
333 if (!idev) {
334 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 return -ENODEV;
Eric Dumazet96b52e62010-06-07 21:05:02 +0000336 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
338 err = -EADDRNOTAVAIL;
339
Eric Dumazet456b61b2010-11-23 13:12:15 +0000340 for_each_pmc_rcu(inet6, pmc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
342 continue;
343 if (ipv6_addr_equal(&pmc->addr, group))
344 break;
345 }
David L Stevens917f2f12005-07-08 17:45:16 -0700346 if (!pmc) { /* must have a prior join */
347 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 goto done;
David L Stevens917f2f12005-07-08 17:45:16 -0700349 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 /* if a source filter was set, must be the same mode as before */
351 if (pmc->sflist) {
David L Stevens917f2f12005-07-08 17:45:16 -0700352 if (pmc->sfmode != omode) {
353 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 goto done;
David L Stevens917f2f12005-07-08 17:45:16 -0700355 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 } else if (pmc->sfmode != omode) {
357 /* allow mode switches for empty-set filters */
358 ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
359 ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
360 pmc->sfmode = omode;
361 }
362
Eric Dumazet96b52e62010-06-07 21:05:02 +0000363 write_lock(&pmc->sflock);
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800364 pmclocked = 1;
365
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 psl = pmc->sflist;
367 if (!add) {
368 if (!psl)
David L Stevens917f2f12005-07-08 17:45:16 -0700369 goto done; /* err = -EADDRNOTAVAIL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 rv = !0;
Ian Morris67ba4152014-08-24 21:53:10 +0100371 for (i = 0; i < psl->sl_count; i++) {
YOSHIFUJI Hideaki / 吉藤英明07c2fec2013-01-29 12:48:23 +0000372 rv = !ipv6_addr_equal(&psl->sl_addr[i], source);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 if (rv == 0)
374 break;
375 }
376 if (rv) /* source not found */
David L Stevens917f2f12005-07-08 17:45:16 -0700377 goto done; /* err = -EADDRNOTAVAIL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700379 /* special case - (INCLUDE, empty) == LEAVE_GROUP */
380 if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
381 leavegroup = 1;
382 goto done;
383 }
384
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 /* update the interface filter */
386 ip6_mc_del_src(idev, group, omode, 1, source, 1);
387
Ian Morris67ba4152014-08-24 21:53:10 +0100388 for (j = i+1; j < psl->sl_count; j++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 psl->sl_addr[j-1] = psl->sl_addr[j];
390 psl->sl_count--;
391 err = 0;
392 goto done;
393 }
394 /* else, add a new source to the filter */
395
396 if (psl && psl->sl_count >= sysctl_mld_max_msf) {
397 err = -ENOBUFS;
398 goto done;
399 }
400 if (!psl || psl->sl_count == psl->sl_max) {
401 struct ip6_sf_socklist *newpsl;
402 int count = IP6_SFBLOCK;
403
404 if (psl)
405 count += psl->sl_max;
Kris Katterjohn8b3a7002006-01-11 15:56:43 -0800406 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 if (!newpsl) {
408 err = -ENOBUFS;
409 goto done;
410 }
411 newpsl->sl_max = count;
412 newpsl->sl_count = count - IP6_SFBLOCK;
413 if (psl) {
Ian Morris67ba4152014-08-24 21:53:10 +0100414 for (i = 0; i < psl->sl_count; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 newpsl->sl_addr[i] = psl->sl_addr[i];
416 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
417 }
418 pmc->sflist = psl = newpsl;
419 }
420 rv = 1; /* > 0 for insert logic below if sl_count is 0 */
Ian Morris67ba4152014-08-24 21:53:10 +0100421 for (i = 0; i < psl->sl_count; i++) {
YOSHIFUJI Hideaki / 吉藤英明07c2fec2013-01-29 12:48:23 +0000422 rv = !ipv6_addr_equal(&psl->sl_addr[i], source);
Jean Sacren56db1c52013-02-03 21:34:10 +0000423 if (rv == 0) /* There is an error in the address. */
424 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 }
Ian Morris67ba4152014-08-24 21:53:10 +0100426 for (j = psl->sl_count-1; j >= i; j--)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 psl->sl_addr[j+1] = psl->sl_addr[j];
428 psl->sl_addr[i] = *source;
429 psl->sl_count++;
430 err = 0;
431 /* update the interface list */
432 ip6_mc_add_src(idev, group, omode, 1, source, 1);
433done:
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800434 if (pmclocked)
Eric Dumazet96b52e62010-06-07 21:05:02 +0000435 write_unlock(&pmc->sflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 read_unlock_bh(&idev->lock);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000437 rcu_read_unlock();
David L Stevensc9e3e8b2005-06-21 13:58:25 -0700438 if (leavegroup)
Marcelo Ricardo Leitner54ff9ef2015-03-18 14:50:43 -0300439 err = ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 return err;
441}
442
443int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf)
444{
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000445 const struct in6_addr *group;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 struct ipv6_mc_socklist *pmc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 struct inet6_dev *idev;
448 struct ipv6_pinfo *inet6 = inet6_sk(sk);
449 struct ip6_sf_socklist *newpsl, *psl;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900450 struct net *net = sock_net(sk);
David L Stevens9951f032005-07-08 17:47:28 -0700451 int leavegroup = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 int i, err;
453
454 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
455
456 if (!ipv6_addr_is_multicast(group))
457 return -EINVAL;
458 if (gsf->gf_fmode != MCAST_INCLUDE &&
459 gsf->gf_fmode != MCAST_EXCLUDE)
460 return -EINVAL;
461
Eric Dumazet96b52e62010-06-07 21:05:02 +0000462 rcu_read_lock();
463 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464
Eric Dumazet96b52e62010-06-07 21:05:02 +0000465 if (!idev) {
466 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 return -ENODEV;
Eric Dumazet96b52e62010-06-07 21:05:02 +0000468 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469
David S. Miller9c059892005-07-08 21:44:39 -0700470 err = 0;
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800471
David L Stevens9951f032005-07-08 17:47:28 -0700472 if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
473 leavegroup = 1;
474 goto done;
475 }
476
Eric Dumazet456b61b2010-11-23 13:12:15 +0000477 for_each_pmc_rcu(inet6, pmc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 if (pmc->ifindex != gsf->gf_interface)
479 continue;
480 if (ipv6_addr_equal(&pmc->addr, group))
481 break;
482 }
David L Stevens917f2f12005-07-08 17:45:16 -0700483 if (!pmc) { /* must have a prior join */
484 err = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 goto done;
David L Stevens917f2f12005-07-08 17:45:16 -0700486 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 if (gsf->gf_numsrc) {
Kris Katterjohn8b3a7002006-01-11 15:56:43 -0800488 newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
489 GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 if (!newpsl) {
491 err = -ENOBUFS;
492 goto done;
493 }
494 newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
Ian Morris67ba4152014-08-24 21:53:10 +0100495 for (i = 0; i < newpsl->sl_count; ++i) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 struct sockaddr_in6 *psin6;
497
498 psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i];
499 newpsl->sl_addr[i] = psin6->sin6_addr;
500 }
501 err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
502 newpsl->sl_count, newpsl->sl_addr, 0);
503 if (err) {
504 sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
505 goto done;
506 }
Yan Zheng8713dbf2005-10-28 08:02:08 +0800507 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 newpsl = NULL;
Yan Zheng8713dbf2005-10-28 08:02:08 +0800509 (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
510 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800511
Eric Dumazet96b52e62010-06-07 21:05:02 +0000512 write_lock(&pmc->sflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 psl = pmc->sflist;
514 if (psl) {
515 (void) ip6_mc_del_src(idev, group, pmc->sfmode,
516 psl->sl_count, psl->sl_addr, 0);
517 sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max));
518 } else
519 (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
520 pmc->sflist = newpsl;
521 pmc->sfmode = gsf->gf_fmode;
Eric Dumazet96b52e62010-06-07 21:05:02 +0000522 write_unlock(&pmc->sflock);
David L Stevens917f2f12005-07-08 17:45:16 -0700523 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524done:
525 read_unlock_bh(&idev->lock);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000526 rcu_read_unlock();
David L Stevens9951f032005-07-08 17:47:28 -0700527 if (leavegroup)
528 err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 return err;
530}
531
532int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
533 struct group_filter __user *optval, int __user *optlen)
534{
535 int err, i, count, copycount;
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000536 const struct in6_addr *group;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 struct ipv6_mc_socklist *pmc;
538 struct inet6_dev *idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 struct ipv6_pinfo *inet6 = inet6_sk(sk);
540 struct ip6_sf_socklist *psl;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900541 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542
543 group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
544
545 if (!ipv6_addr_is_multicast(group))
546 return -EINVAL;
547
Eric Dumazet96b52e62010-06-07 21:05:02 +0000548 rcu_read_lock();
549 idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550
Eric Dumazet96b52e62010-06-07 21:05:02 +0000551 if (!idev) {
552 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 return -ENODEV;
Eric Dumazet96b52e62010-06-07 21:05:02 +0000554 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555
556 err = -EADDRNOTAVAIL;
WANG Congf7ed9252014-09-11 15:35:15 -0700557 /* changes to the ipv6_mc_list require the socket lock and
558 * rtnl lock. We have the socket lock and rcu read lock,
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800559 * so reading the list is safe.
560 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561
Eric Dumazet456b61b2010-11-23 13:12:15 +0000562 for_each_pmc_rcu(inet6, pmc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 if (pmc->ifindex != gsf->gf_interface)
564 continue;
565 if (ipv6_addr_equal(group, &pmc->addr))
566 break;
567 }
568 if (!pmc) /* must have a prior join */
569 goto done;
570 gsf->gf_fmode = pmc->sfmode;
571 psl = pmc->sflist;
572 count = psl ? psl->sl_count : 0;
573 read_unlock_bh(&idev->lock);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000574 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575
576 copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
577 gsf->gf_numsrc = count;
578 if (put_user(GROUP_FILTER_SIZE(copycount), optlen) ||
579 copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) {
580 return -EFAULT;
581 }
WANG Congf7ed9252014-09-11 15:35:15 -0700582 /* changes to psl require the socket lock, and a write lock
583 * on pmc->sflock. We have the socket lock so reading here is safe.
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800584 */
Ian Morris67ba4152014-08-24 21:53:10 +0100585 for (i = 0; i < copycount; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 struct sockaddr_in6 *psin6;
587 struct sockaddr_storage ss;
588
589 psin6 = (struct sockaddr_in6 *)&ss;
590 memset(&ss, 0, sizeof(ss));
591 psin6->sin6_family = AF_INET6;
592 psin6->sin6_addr = psl->sl_addr[i];
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900593 if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 return -EFAULT;
595 }
596 return 0;
597done:
598 read_unlock_bh(&idev->lock);
Eric Dumazet96b52e62010-06-07 21:05:02 +0000599 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 return err;
601}
602
Eric Dumazeta50feda2012-05-18 18:57:34 +0000603bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
604 const struct in6_addr *src_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605{
606 struct ipv6_pinfo *np = inet6_sk(sk);
607 struct ipv6_mc_socklist *mc;
608 struct ip6_sf_socklist *psl;
Eric Dumazeta50feda2012-05-18 18:57:34 +0000609 bool rv = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610
Eric Dumazet456b61b2010-11-23 13:12:15 +0000611 rcu_read_lock();
612 for_each_pmc_rcu(np, mc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 if (ipv6_addr_equal(&mc->addr, mc_addr))
614 break;
615 }
616 if (!mc) {
Eric Dumazet456b61b2010-11-23 13:12:15 +0000617 rcu_read_unlock();
Eric Dumazeta50feda2012-05-18 18:57:34 +0000618 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800620 read_lock(&mc->sflock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 psl = mc->sflist;
622 if (!psl) {
623 rv = mc->sfmode == MCAST_EXCLUDE;
624 } else {
625 int i;
626
Ian Morris67ba4152014-08-24 21:53:10 +0100627 for (i = 0; i < psl->sl_count; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
629 break;
630 }
631 if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
Eric Dumazeta50feda2012-05-18 18:57:34 +0000632 rv = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
Eric Dumazeta50feda2012-05-18 18:57:34 +0000634 rv = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -0800636 read_unlock(&mc->sflock);
Eric Dumazet456b61b2010-11-23 13:12:15 +0000637 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
639 return rv;
640}
641
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642static void igmp6_group_added(struct ifmcaddr6 *mc)
643{
644 struct net_device *dev = mc->idev->dev;
645 char buf[MAX_ADDR_LEN];
646
YOSHIFUJI Hideaki / 吉藤英明ec16ef22013-02-09 04:29:58 +0000647 if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) <
648 IPV6_ADDR_SCOPE_LINKLOCAL)
649 return;
650
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 spin_lock_bh(&mc->mca_lock);
652 if (!(mc->mca_flags&MAF_LOADED)) {
653 mc->mca_flags |= MAF_LOADED;
654 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
Jiri Pirko22bedad32010-04-01 21:22:57 +0000655 dev_mc_add(dev, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 }
657 spin_unlock_bh(&mc->mca_lock);
658
659 if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
660 return;
661
Daniel Borkmann6c567b72013-09-04 00:19:38 +0200662 if (mld_in_v1_mode(mc->idev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 igmp6_join_group(mc);
664 return;
665 }
666 /* else v2 */
667
668 mc->mca_crcount = mc->idev->mc_qrv;
669 mld_ifc_event(mc->idev);
670}
671
672static void igmp6_group_dropped(struct ifmcaddr6 *mc)
673{
674 struct net_device *dev = mc->idev->dev;
675 char buf[MAX_ADDR_LEN];
676
YOSHIFUJI Hideaki / 吉藤英明ec16ef22013-02-09 04:29:58 +0000677 if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) <
678 IPV6_ADDR_SCOPE_LINKLOCAL)
679 return;
680
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 spin_lock_bh(&mc->mca_lock);
682 if (mc->mca_flags&MAF_LOADED) {
683 mc->mca_flags &= ~MAF_LOADED;
684 if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
Jiri Pirko22bedad32010-04-01 21:22:57 +0000685 dev_mc_del(dev, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686 }
687
688 if (mc->mca_flags & MAF_NOREPORT)
689 goto done;
690 spin_unlock_bh(&mc->mca_lock);
691
692 if (!mc->idev->dead)
693 igmp6_leave_group(mc);
694
695 spin_lock_bh(&mc->mca_lock);
696 if (del_timer(&mc->mca_timer))
697 atomic_dec(&mc->mca_refcnt);
698done:
699 ip6_mc_clear_src(mc);
700 spin_unlock_bh(&mc->mca_lock);
701}
702
703/*
704 * deleted ifmcaddr6 manipulation
705 */
706static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
707{
708 struct ifmcaddr6 *pmc;
709
710 /* this is an "ifmcaddr6" for convenience; only the fields below
711 * are actually used. In particular, the refcnt and users are not
712 * used for management of the delete list. Using the same structure
713 * for deleted items allows change reports to use common code with
714 * non-deleted or query-response MCA's.
715 */
Ingo Oeser0c600ed2006-03-20 23:01:32 -0800716 pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 if (!pmc)
718 return;
Ingo Oeser0c600ed2006-03-20 23:01:32 -0800719
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 spin_lock_bh(&im->mca_lock);
721 spin_lock_init(&pmc->mca_lock);
722 pmc->idev = im->idev;
723 in6_dev_hold(idev);
724 pmc->mca_addr = im->mca_addr;
725 pmc->mca_crcount = idev->mc_qrv;
726 pmc->mca_sfmode = im->mca_sfmode;
727 if (pmc->mca_sfmode == MCAST_INCLUDE) {
728 struct ip6_sf_list *psf;
729
730 pmc->mca_tomb = im->mca_tomb;
731 pmc->mca_sources = im->mca_sources;
732 im->mca_tomb = im->mca_sources = NULL;
Ian Morris67ba4152014-08-24 21:53:10 +0100733 for (psf = pmc->mca_sources; psf; psf = psf->sf_next)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 psf->sf_crcount = pmc->mca_crcount;
735 }
736 spin_unlock_bh(&im->mca_lock);
737
Stephen Hemminger6457d262010-02-17 18:48:44 -0800738 spin_lock_bh(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 pmc->next = idev->mc_tomb;
740 idev->mc_tomb = pmc;
Stephen Hemminger6457d262010-02-17 18:48:44 -0800741 spin_unlock_bh(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742}
743
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000744static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *pmca)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745{
746 struct ifmcaddr6 *pmc, *pmc_prev;
747 struct ip6_sf_list *psf, *psf_next;
748
Stephen Hemminger6457d262010-02-17 18:48:44 -0800749 spin_lock_bh(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 pmc_prev = NULL;
Ian Morris67ba4152014-08-24 21:53:10 +0100751 for (pmc = idev->mc_tomb; pmc; pmc = pmc->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 if (ipv6_addr_equal(&pmc->mca_addr, pmca))
753 break;
754 pmc_prev = pmc;
755 }
756 if (pmc) {
757 if (pmc_prev)
758 pmc_prev->next = pmc->next;
759 else
760 idev->mc_tomb = pmc->next;
761 }
Stephen Hemminger6457d262010-02-17 18:48:44 -0800762 spin_unlock_bh(&idev->mc_lock);
763
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 if (pmc) {
Ian Morris67ba4152014-08-24 21:53:10 +0100765 for (psf = pmc->mca_tomb; psf; psf = psf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 psf_next = psf->sf_next;
767 kfree(psf);
768 }
769 in6_dev_put(pmc->idev);
770 kfree(pmc);
771 }
772}
773
774static void mld_clear_delrec(struct inet6_dev *idev)
775{
776 struct ifmcaddr6 *pmc, *nextpmc;
777
Stephen Hemminger6457d262010-02-17 18:48:44 -0800778 spin_lock_bh(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 pmc = idev->mc_tomb;
780 idev->mc_tomb = NULL;
Stephen Hemminger6457d262010-02-17 18:48:44 -0800781 spin_unlock_bh(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782
783 for (; pmc; pmc = nextpmc) {
784 nextpmc = pmc->next;
785 ip6_mc_clear_src(pmc);
786 in6_dev_put(pmc->idev);
787 kfree(pmc);
788 }
789
790 /* clear dead sources, too */
791 read_lock_bh(&idev->lock);
Ian Morris67ba4152014-08-24 21:53:10 +0100792 for (pmc = idev->mc_list; pmc; pmc = pmc->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 struct ip6_sf_list *psf, *psf_next;
794
795 spin_lock_bh(&pmc->mca_lock);
796 psf = pmc->mca_tomb;
797 pmc->mca_tomb = NULL;
798 spin_unlock_bh(&pmc->mca_lock);
Ian Morris67ba4152014-08-24 21:53:10 +0100799 for (; psf; psf = psf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 psf_next = psf->sf_next;
801 kfree(psf);
802 }
803 }
804 read_unlock_bh(&idev->lock);
805}
806
WANG Cong1691c632014-09-11 15:35:16 -0700807static void mca_get(struct ifmcaddr6 *mc)
808{
809 atomic_inc(&mc->mca_refcnt);
810}
811
812static void ma_put(struct ifmcaddr6 *mc)
813{
814 if (atomic_dec_and_test(&mc->mca_refcnt)) {
815 in6_dev_put(mc->idev);
816 kfree(mc);
817 }
818}
819
820static struct ifmcaddr6 *mca_alloc(struct inet6_dev *idev,
821 const struct in6_addr *addr)
822{
823 struct ifmcaddr6 *mc;
824
825 mc = kzalloc(sizeof(*mc), GFP_ATOMIC);
Ian Morris63159f22015-03-29 14:00:04 +0100826 if (!mc)
WANG Cong1691c632014-09-11 15:35:16 -0700827 return NULL;
828
829 setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc);
830
831 mc->mca_addr = *addr;
832 mc->idev = idev; /* reference taken by caller */
833 mc->mca_users = 1;
834 /* mca_stamp should be updated upon changes */
835 mc->mca_cstamp = mc->mca_tstamp = jiffies;
836 atomic_set(&mc->mca_refcnt, 1);
837 spin_lock_init(&mc->mca_lock);
838
839 /* initial mode is (EX, empty) */
840 mc->mca_sfmode = MCAST_EXCLUDE;
841 mc->mca_sfcount[MCAST_EXCLUDE] = 1;
842
843 if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
844 IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
845 mc->mca_flags |= MAF_NOREPORT;
846
847 return mc;
848}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849
850/*
851 * device multicast group inc (add if not found)
852 */
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900853int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854{
855 struct ifmcaddr6 *mc;
856 struct inet6_dev *idev;
857
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +0200858 ASSERT_RTNL();
859
Eric Dumazet96b52e62010-06-07 21:05:02 +0000860 /* we need to take a reference on idev */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 idev = in6_dev_get(dev);
862
Ian Morris63159f22015-03-29 14:00:04 +0100863 if (!idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 return -EINVAL;
865
866 write_lock_bh(&idev->lock);
867 if (idev->dead) {
868 write_unlock_bh(&idev->lock);
869 in6_dev_put(idev);
870 return -ENODEV;
871 }
872
873 for (mc = idev->mc_list; mc; mc = mc->next) {
874 if (ipv6_addr_equal(&mc->mca_addr, addr)) {
875 mc->mca_users++;
876 write_unlock_bh(&idev->lock);
877 ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0,
878 NULL, 0);
879 in6_dev_put(idev);
880 return 0;
881 }
882 }
883
WANG Cong1691c632014-09-11 15:35:16 -0700884 mc = mca_alloc(idev, addr);
885 if (!mc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 write_unlock_bh(&idev->lock);
887 in6_dev_put(idev);
888 return -ENOMEM;
889 }
890
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 mc->next = idev->mc_list;
892 idev->mc_list = mc;
WANG Cong1691c632014-09-11 15:35:16 -0700893
894 /* Hold this for the code below before we unlock,
895 * it is already exposed via idev->mc_list.
896 */
897 mca_get(mc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 write_unlock_bh(&idev->lock);
899
900 mld_del_delrec(idev, &mc->mca_addr);
901 igmp6_group_added(mc);
902 ma_put(mc);
903 return 0;
904}
905
906/*
907 * device multicast group del
908 */
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900909int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910{
911 struct ifmcaddr6 *ma, **map;
912
Sabrina Dubrocaa9ed4a22014-09-02 10:29:29 +0200913 ASSERT_RTNL();
914
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 write_lock_bh(&idev->lock);
Ian Morris67ba4152014-08-24 21:53:10 +0100916 for (map = &idev->mc_list; (ma = *map) != NULL; map = &ma->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 if (ipv6_addr_equal(&ma->mca_addr, addr)) {
918 if (--ma->mca_users == 0) {
919 *map = ma->next;
920 write_unlock_bh(&idev->lock);
921
922 igmp6_group_dropped(ma);
923
924 ma_put(ma);
925 return 0;
926 }
927 write_unlock_bh(&idev->lock);
928 return 0;
929 }
930 }
931 write_unlock_bh(&idev->lock);
932
933 return -ENOENT;
934}
935
YOSHIFUJI Hideaki9acd9f32008-04-10 15:42:10 +0900936int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937{
Eric Dumazet96b52e62010-06-07 21:05:02 +0000938 struct inet6_dev *idev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 int err;
940
WANG Cong414b6c92014-09-11 15:35:14 -0700941 ASSERT_RTNL();
Eric Dumazet96b52e62010-06-07 21:05:02 +0000942
943 idev = __in6_dev_get(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 if (!idev)
Eric Dumazet96b52e62010-06-07 21:05:02 +0000945 err = -ENODEV;
946 else
947 err = __ipv6_dev_mc_dec(idev, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 return err;
950}
951
952/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953 * check if the interface/address pair is valid
954 */
Eric Dumazeta50feda2012-05-18 18:57:34 +0000955bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
956 const struct in6_addr *src_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957{
958 struct inet6_dev *idev;
959 struct ifmcaddr6 *mc;
Eric Dumazeta50feda2012-05-18 18:57:34 +0000960 bool rv = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961
Eric Dumazet96b52e62010-06-07 21:05:02 +0000962 rcu_read_lock();
963 idev = __in6_dev_get(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 if (idev) {
965 read_lock_bh(&idev->lock);
Ian Morris67ba4152014-08-24 21:53:10 +0100966 for (mc = idev->mc_list; mc; mc = mc->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 if (ipv6_addr_equal(&mc->mca_addr, group))
968 break;
969 }
970 if (mc) {
971 if (src_addr && !ipv6_addr_any(src_addr)) {
972 struct ip6_sf_list *psf;
973
974 spin_lock_bh(&mc->mca_lock);
Ian Morris67ba4152014-08-24 21:53:10 +0100975 for (psf = mc->mca_sources; psf; psf = psf->sf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 if (ipv6_addr_equal(&psf->sf_addr, src_addr))
977 break;
978 }
979 if (psf)
980 rv = psf->sf_count[MCAST_INCLUDE] ||
981 psf->sf_count[MCAST_EXCLUDE] !=
982 mc->mca_sfcount[MCAST_EXCLUDE];
983 else
Ian Morris67ba4152014-08-24 21:53:10 +0100984 rv = mc->mca_sfcount[MCAST_EXCLUDE] != 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 spin_unlock_bh(&mc->mca_lock);
986 } else
Eric Dumazeta50feda2012-05-18 18:57:34 +0000987 rv = true; /* don't filter unspecified source */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988 }
989 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990 }
Eric Dumazet96b52e62010-06-07 21:05:02 +0000991 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 return rv;
993}
994
995static void mld_gq_start_timer(struct inet6_dev *idev)
996{
Aruna-Hewapathirane63862b52014-01-11 07:15:59 -0500997 unsigned long tv = prandom_u32() % idev->mc_maxdelay;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998
999 idev->mc_gq_running = 1;
1000 if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2))
1001 in6_dev_hold(idev);
1002}
1003
Daniel Borkmannb4af8de2013-09-04 00:19:43 +02001004static void mld_gq_stop_timer(struct inet6_dev *idev)
1005{
1006 idev->mc_gq_running = 0;
1007 if (del_timer(&idev->mc_gq_timer))
1008 __in6_dev_put(idev);
1009}
1010
Daniel Borkmannc2cef4e2013-08-20 12:22:01 +02001011static void mld_ifc_start_timer(struct inet6_dev *idev, unsigned long delay)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012{
Aruna-Hewapathirane63862b52014-01-11 07:15:59 -05001013 unsigned long tv = prandom_u32() % delay;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014
1015 if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2))
1016 in6_dev_hold(idev);
1017}
1018
Daniel Borkmannb4af8de2013-09-04 00:19:43 +02001019static void mld_ifc_stop_timer(struct inet6_dev *idev)
1020{
1021 idev->mc_ifc_count = 0;
1022 if (del_timer(&idev->mc_ifc_timer))
1023 __in6_dev_put(idev);
1024}
1025
Daniel Borkmannc2cef4e2013-08-20 12:22:01 +02001026static void mld_dad_start_timer(struct inet6_dev *idev, unsigned long delay)
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02001027{
Aruna-Hewapathirane63862b52014-01-11 07:15:59 -05001028 unsigned long tv = prandom_u32() % delay;
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02001029
1030 if (!mod_timer(&idev->mc_dad_timer, jiffies+tv+2))
1031 in6_dev_hold(idev);
1032}
1033
Daniel Borkmannb4af8de2013-09-04 00:19:43 +02001034static void mld_dad_stop_timer(struct inet6_dev *idev)
1035{
1036 if (del_timer(&idev->mc_dad_timer))
1037 __in6_dev_put(idev);
1038}
1039
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040/*
1041 * IGMP handling (alias multicast ICMPv6 messages)
1042 */
1043
1044static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
1045{
1046 unsigned long delay = resptime;
1047
1048 /* Do not start timer for these addresses */
1049 if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
1050 IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
1051 return;
1052
1053 if (del_timer(&ma->mca_timer)) {
1054 atomic_dec(&ma->mca_refcnt);
1055 delay = ma->mca_timer.expires - jiffies;
1056 }
1057
Daniel Borkmanncc7f7ab2013-09-04 00:19:41 +02001058 if (delay >= resptime)
Aruna-Hewapathirane63862b52014-01-11 07:15:59 -05001059 delay = prandom_u32() % resptime;
Daniel Borkmanncc7f7ab2013-09-04 00:19:41 +02001060
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 ma->mca_timer.expires = jiffies + delay;
1062 if (!mod_timer(&ma->mca_timer, jiffies + delay))
1063 atomic_inc(&ma->mca_refcnt);
1064 ma->mca_flags |= MAF_TIMER_RUNNING;
1065}
1066
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001067/* mark EXCLUDE-mode sources */
Eric Dumazeta50feda2012-05-18 18:57:34 +00001068static bool mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
1069 const struct in6_addr *srcs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070{
1071 struct ip6_sf_list *psf;
1072 int i, scount;
1073
1074 scount = 0;
Ian Morris67ba4152014-08-24 21:53:10 +01001075 for (psf = pmc->mca_sources; psf; psf = psf->sf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 if (scount == nsrcs)
1077 break;
Ian Morris67ba4152014-08-24 21:53:10 +01001078 for (i = 0; i < nsrcs; i++) {
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001079 /* skip inactive filters */
Yan, Zhenge05c4ad32011-08-23 22:54:37 +00001080 if (psf->sf_count[MCAST_INCLUDE] ||
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001081 pmc->mca_sfcount[MCAST_EXCLUDE] !=
1082 psf->sf_count[MCAST_EXCLUDE])
RongQing.Lice713ee2012-04-05 17:36:29 +08001083 break;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001084 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1085 scount++;
1086 break;
1087 }
1088 }
1089 }
1090 pmc->mca_flags &= ~MAF_GSQUERY;
1091 if (scount == nsrcs) /* all sources excluded */
Eric Dumazeta50feda2012-05-18 18:57:34 +00001092 return false;
1093 return true;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001094}
1095
Eric Dumazeta50feda2012-05-18 18:57:34 +00001096static bool mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
1097 const struct in6_addr *srcs)
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001098{
1099 struct ip6_sf_list *psf;
1100 int i, scount;
1101
1102 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1103 return mld_xmarksources(pmc, nsrcs, srcs);
1104
1105 /* mark INCLUDE-mode sources */
1106
1107 scount = 0;
Ian Morris67ba4152014-08-24 21:53:10 +01001108 for (psf = pmc->mca_sources; psf; psf = psf->sf_next) {
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001109 if (scount == nsrcs)
1110 break;
Ian Morris67ba4152014-08-24 21:53:10 +01001111 for (i = 0; i < nsrcs; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
1113 psf->sf_gsresp = 1;
1114 scount++;
1115 break;
1116 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001117 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001119 if (!scount) {
1120 pmc->mca_flags &= ~MAF_GSQUERY;
Eric Dumazeta50feda2012-05-18 18:57:34 +00001121 return false;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001122 }
1123 pmc->mca_flags |= MAF_GSQUERY;
Eric Dumazeta50feda2012-05-18 18:57:34 +00001124 return true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125}
1126
Daniel Borkmann58c0ecf2013-09-04 00:19:40 +02001127static int mld_force_mld_version(const struct inet6_dev *idev)
1128{
1129 /* Normally, both are 0 here. If enforcement to a particular is
1130 * being used, individual device enforcement will have a lower
1131 * precedence over 'all' device (.../conf/all/force_mld_version).
1132 */
1133
1134 if (dev_net(idev->dev)->ipv6.devconf_all->force_mld_version != 0)
1135 return dev_net(idev->dev)->ipv6.devconf_all->force_mld_version;
1136 else
1137 return idev->cnf.force_mld_version;
1138}
1139
1140static bool mld_in_v2_mode_only(const struct inet6_dev *idev)
1141{
1142 return mld_force_mld_version(idev) == 2;
1143}
1144
1145static bool mld_in_v1_mode_only(const struct inet6_dev *idev)
1146{
1147 return mld_force_mld_version(idev) == 1;
1148}
1149
Daniel Borkmann6c567b72013-09-04 00:19:38 +02001150static bool mld_in_v1_mode(const struct inet6_dev *idev)
1151{
Daniel Borkmann58c0ecf2013-09-04 00:19:40 +02001152 if (mld_in_v2_mode_only(idev))
1153 return false;
1154 if (mld_in_v1_mode_only(idev))
Daniel Borkmann6c567b72013-09-04 00:19:38 +02001155 return true;
1156 if (idev->mc_v1_seen && time_before(jiffies, idev->mc_v1_seen))
1157 return true;
1158
1159 return false;
1160}
1161
Daniel Borkmann89225d12013-09-04 00:19:37 +02001162static void mld_set_v1_mode(struct inet6_dev *idev)
1163{
1164 /* RFC3810, relevant sections:
1165 * - 9.1. Robustness Variable
1166 * - 9.2. Query Interval
1167 * - 9.3. Query Response Interval
1168 * - 9.12. Older Version Querier Present Timeout
1169 */
1170 unsigned long switchback;
1171
1172 switchback = (idev->mc_qrv * idev->mc_qi) + idev->mc_qri;
1173
1174 idev->mc_v1_seen = jiffies + switchback;
1175}
1176
1177static void mld_update_qrv(struct inet6_dev *idev,
1178 const struct mld2_query *mlh2)
1179{
1180 /* RFC3810, relevant sections:
1181 * - 5.1.8. QRV (Querier's Robustness Variable)
1182 * - 9.1. Robustness Variable
1183 */
1184
1185 /* The value of the Robustness Variable MUST NOT be zero,
1186 * and SHOULD NOT be one. Catch this here if we ever run
1187 * into such a case in future.
1188 */
Hannes Frederic Sowa2f711932014-09-02 15:49:25 +02001189 const int min_qrv = min(MLD_QRV_DEFAULT, sysctl_mld_qrv);
Daniel Borkmann89225d12013-09-04 00:19:37 +02001190 WARN_ON(idev->mc_qrv == 0);
1191
1192 if (mlh2->mld2q_qrv > 0)
1193 idev->mc_qrv = mlh2->mld2q_qrv;
1194
Hannes Frederic Sowa2f711932014-09-02 15:49:25 +02001195 if (unlikely(idev->mc_qrv < min_qrv)) {
Daniel Borkmann89225d12013-09-04 00:19:37 +02001196 net_warn_ratelimited("IPv6: MLD: clamping QRV from %u to %u!\n",
Hannes Frederic Sowa2f711932014-09-02 15:49:25 +02001197 idev->mc_qrv, min_qrv);
1198 idev->mc_qrv = min_qrv;
Daniel Borkmann89225d12013-09-04 00:19:37 +02001199 }
1200}
1201
1202static void mld_update_qi(struct inet6_dev *idev,
1203 const struct mld2_query *mlh2)
1204{
1205 /* RFC3810, relevant sections:
1206 * - 5.1.9. QQIC (Querier's Query Interval Code)
1207 * - 9.2. Query Interval
1208 * - 9.12. Older Version Querier Present Timeout
1209 * (the [Query Interval] in the last Query received)
1210 */
1211 unsigned long mc_qqi;
1212
1213 if (mlh2->mld2q_qqic < 128) {
1214 mc_qqi = mlh2->mld2q_qqic;
1215 } else {
1216 unsigned long mc_man, mc_exp;
1217
1218 mc_exp = MLDV2_QQIC_EXP(mlh2->mld2q_qqic);
1219 mc_man = MLDV2_QQIC_MAN(mlh2->mld2q_qqic);
1220
1221 mc_qqi = (mc_man | 0x10) << (mc_exp + 3);
1222 }
1223
1224 idev->mc_qi = mc_qqi * HZ;
1225}
1226
1227static void mld_update_qri(struct inet6_dev *idev,
1228 const struct mld2_query *mlh2)
1229{
1230 /* RFC3810, relevant sections:
1231 * - 5.1.3. Maximum Response Code
1232 * - 9.3. Query Response Interval
1233 */
Daniel Borkmanne3f5b172013-09-04 00:19:39 +02001234 idev->mc_qri = msecs_to_jiffies(mldv2_mrc(mlh2));
Daniel Borkmann89225d12013-09-04 00:19:37 +02001235}
1236
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001237static int mld_process_v1(struct inet6_dev *idev, struct mld_msg *mld,
Daniel Borkmann35f7aa52014-09-20 14:03:55 +02001238 unsigned long *max_delay, bool v1_query)
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001239{
1240 unsigned long mldv1_md;
1241
1242 /* Ignore v1 queries */
1243 if (mld_in_v2_mode_only(idev))
1244 return -EINVAL;
1245
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001246 mldv1_md = ntohs(mld->mld_maxdelay);
Daniel Borkmann35f7aa52014-09-20 14:03:55 +02001247
1248 /* When in MLDv1 fallback and a MLDv2 router start-up being
1249 * unaware of current MLDv1 operation, the MRC == MRD mapping
1250 * only works when the exponential algorithm is not being
1251 * used (as MLDv1 is unaware of such things).
1252 *
1253 * According to the RFC author, the MLDv2 implementations
1254 * he's aware of all use a MRC < 32768 on start up queries.
1255 *
1256 * Thus, should we *ever* encounter something else larger
1257 * than that, just assume the maximum possible within our
1258 * reach.
1259 */
1260 if (!v1_query)
1261 mldv1_md = min(mldv1_md, MLDV1_MRD_MAX_COMPAT);
1262
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001263 *max_delay = max(msecs_to_jiffies(mldv1_md), 1UL);
1264
Daniel Borkmann35f7aa52014-09-20 14:03:55 +02001265 /* MLDv1 router present: we need to go into v1 mode *only*
1266 * when an MLDv1 query is received as per section 9.12. of
1267 * RFC3810! And we know from RFC2710 section 3.7 that MLDv1
1268 * queries MUST be of exactly 24 octets.
1269 */
1270 if (v1_query)
1271 mld_set_v1_mode(idev);
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001272
1273 /* cancel MLDv2 report timer */
Daniel Borkmannb4af8de2013-09-04 00:19:43 +02001274 mld_gq_stop_timer(idev);
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001275 /* cancel the interface change timer */
Daniel Borkmannb4af8de2013-09-04 00:19:43 +02001276 mld_ifc_stop_timer(idev);
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001277 /* clear deleted report items */
1278 mld_clear_delrec(idev);
1279
1280 return 0;
1281}
1282
1283static int mld_process_v2(struct inet6_dev *idev, struct mld2_query *mld,
1284 unsigned long *max_delay)
1285{
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001286 *max_delay = max(msecs_to_jiffies(mldv2_mrc(mld)), 1UL);
1287
1288 mld_update_qrv(idev, mld);
1289 mld_update_qi(idev, mld);
1290 mld_update_qri(idev, mld);
1291
1292 idev->mc_maxdelay = *max_delay;
1293
1294 return 0;
1295}
1296
Eric Dumazet96b52e62010-06-07 21:05:02 +00001297/* called with rcu_read_lock() */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298int igmp6_event_query(struct sk_buff *skb)
1299{
Yan Zheng97300b52005-10-31 20:09:45 +08001300 struct mld2_query *mlh2 = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 struct ifmcaddr6 *ma;
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001302 const struct in6_addr *group;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303 unsigned long max_delay;
1304 struct inet6_dev *idev;
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001305 struct mld_msg *mld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 int group_type;
1307 int mark = 0;
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001308 int len, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309
1310 if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
1311 return -EINVAL;
1312
1313 /* compute payload length excluding extension headers */
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -07001314 len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr);
Arnaldo Carvalho de Melocfe1fc72007-03-16 17:26:39 -03001315 len -= skb_network_header_len(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316
Hangbin Liue940f5d2014-06-27 09:57:53 +08001317 /* RFC3810 6.2
1318 * Upon reception of an MLD message that contains a Query, the node
1319 * checks if the source address of the message is a valid link-local
1320 * address, if the Hop Limit is set to 1, and if the Router Alert
1321 * option is present in the Hop-By-Hop Options header of the IPv6
1322 * packet. If any of these checks fails, the packet is dropped.
1323 */
1324 if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL) ||
1325 ipv6_hdr(skb)->hop_limit != 1 ||
1326 !(IP6CB(skb)->flags & IP6SKB_ROUTERALERT) ||
1327 IP6CB(skb)->ra != htons(IPV6_OPT_ROUTERALERT_MLD))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328 return -EINVAL;
1329
Eric Dumazet96b52e62010-06-07 21:05:02 +00001330 idev = __in6_dev_get(skb->dev);
Ian Morris63159f22015-03-29 14:00:04 +01001331 if (!idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 return 0;
1333
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001334 mld = (struct mld_msg *)icmp6_hdr(skb);
1335 group = &mld->mld_mca;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336 group_type = ipv6_addr_type(group);
1337
1338 if (group_type != IPV6_ADDR_ANY &&
Eric Dumazet96b52e62010-06-07 21:05:02 +00001339 !(group_type&IPV6_ADDR_MULTICAST))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341
Daniel Borkmann35f7aa52014-09-20 14:03:55 +02001342 if (len < MLD_V1_QUERY_LEN) {
1343 return -EINVAL;
1344 } else if (len == MLD_V1_QUERY_LEN || mld_in_v1_mode(idev)) {
1345 err = mld_process_v1(idev, mld, &max_delay,
1346 len == MLD_V1_QUERY_LEN);
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001347 if (err < 0)
1348 return err;
Daniel Borkmann9fd07842013-08-20 12:22:02 +02001349 } else if (len >= MLD_V2_QUERY_LEN_MIN) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001350 int srcs_offset = sizeof(struct mld2_query) -
Yan Zheng97300b52005-10-31 20:09:45 +08001351 sizeof(struct icmp6hdr);
Daniel Borkmann89225d12013-09-04 00:19:37 +02001352
Eric Dumazet96b52e62010-06-07 21:05:02 +00001353 if (!pskb_may_pull(skb, srcs_offset))
Yan Zheng97300b52005-10-31 20:09:45 +08001354 return -EINVAL;
Eric Dumazet96b52e62010-06-07 21:05:02 +00001355
Arnaldo Carvalho de Melo9c702202007-04-25 18:04:18 -07001356 mlh2 = (struct mld2_query *)skb_transport_header(skb);
Daniel Borkmann84698962013-08-20 12:22:00 +02001357
Daniel Borkmann2b7c1212013-09-04 00:19:42 +02001358 err = mld_process_v2(idev, mlh2, &max_delay);
1359 if (err < 0)
1360 return err;
Daniel Borkmann89225d12013-09-04 00:19:37 +02001361
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 if (group_type == IPV6_ADDR_ANY) { /* general query */
Eric Dumazet96b52e62010-06-07 21:05:02 +00001363 if (mlh2->mld2q_nsrcs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364 return -EINVAL; /* no sources allowed */
Eric Dumazet96b52e62010-06-07 21:05:02 +00001365
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366 mld_gq_start_timer(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367 return 0;
1368 }
1369 /* mark sources to include, if group & source-specific */
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001370 if (mlh2->mld2q_nsrcs != 0) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001371 if (!pskb_may_pull(skb, srcs_offset +
Eric Dumazet96b52e62010-06-07 21:05:02 +00001372 ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr)))
Yan Zheng97300b52005-10-31 20:09:45 +08001373 return -EINVAL;
Eric Dumazet96b52e62010-06-07 21:05:02 +00001374
Arnaldo Carvalho de Melo9c702202007-04-25 18:04:18 -07001375 mlh2 = (struct mld2_query *)skb_transport_header(skb);
Yan Zheng97300b52005-10-31 20:09:45 +08001376 mark = 1;
1377 }
Daniel Borkmann35f7aa52014-09-20 14:03:55 +02001378 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379 return -EINVAL;
Daniel Borkmann35f7aa52014-09-20 14:03:55 +02001380 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001381
1382 read_lock_bh(&idev->lock);
1383 if (group_type == IPV6_ADDR_ANY) {
Ian Morris67ba4152014-08-24 21:53:10 +01001384 for (ma = idev->mc_list; ma; ma = ma->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385 spin_lock_bh(&ma->mca_lock);
1386 igmp6_group_queried(ma, max_delay);
1387 spin_unlock_bh(&ma->mca_lock);
1388 }
1389 } else {
Ian Morris67ba4152014-08-24 21:53:10 +01001390 for (ma = idev->mc_list; ma; ma = ma->next) {
David L Stevens7add2a42006-01-24 13:06:39 -08001391 if (!ipv6_addr_equal(group, &ma->mca_addr))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392 continue;
1393 spin_lock_bh(&ma->mca_lock);
1394 if (ma->mca_flags & MAF_TIMER_RUNNING) {
1395 /* gsquery <- gsquery && mark */
1396 if (!mark)
1397 ma->mca_flags &= ~MAF_GSQUERY;
1398 } else {
1399 /* gsquery <- mark */
1400 if (mark)
1401 ma->mca_flags |= MAF_GSQUERY;
1402 else
1403 ma->mca_flags &= ~MAF_GSQUERY;
1404 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001405 if (!(ma->mca_flags & MAF_GSQUERY) ||
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001406 mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs))
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001407 igmp6_group_queried(ma, max_delay);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408 spin_unlock_bh(&ma->mca_lock);
David L Stevens7add2a42006-01-24 13:06:39 -08001409 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410 }
1411 }
1412 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413
1414 return 0;
1415}
1416
Eric Dumazet96b52e62010-06-07 21:05:02 +00001417/* called with rcu_read_lock() */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418int igmp6_event_report(struct sk_buff *skb)
1419{
1420 struct ifmcaddr6 *ma;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421 struct inet6_dev *idev;
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001422 struct mld_msg *mld;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423 int addr_type;
1424
1425 /* Our own report looped back. Ignore it. */
1426 if (skb->pkt_type == PACKET_LOOPBACK)
1427 return 0;
1428
David Stevens24c69272005-12-02 20:32:59 -08001429 /* send our report if the MC router may not have heard this report */
1430 if (skb->pkt_type != PACKET_MULTICAST &&
1431 skb->pkt_type != PACKET_BROADCAST)
1432 return 0;
1433
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001434 if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435 return -EINVAL;
1436
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001437 mld = (struct mld_msg *)icmp6_hdr(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438
1439 /* Drop reports with not link local source */
Arnaldo Carvalho de Melo0660e032007-04-25 17:54:47 -07001440 addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001441 if (addr_type != IPV6_ADDR_ANY &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442 !(addr_type&IPV6_ADDR_LINKLOCAL))
1443 return -EINVAL;
1444
Eric Dumazet96b52e62010-06-07 21:05:02 +00001445 idev = __in6_dev_get(skb->dev);
Ian Morris63159f22015-03-29 14:00:04 +01001446 if (!idev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447 return -ENODEV;
1448
1449 /*
1450 * Cancel the timer for this group
1451 */
1452
1453 read_lock_bh(&idev->lock);
Ian Morris67ba4152014-08-24 21:53:10 +01001454 for (ma = idev->mc_list; ma; ma = ma->next) {
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001455 if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456 spin_lock(&ma->mca_lock);
1457 if (del_timer(&ma->mca_timer))
1458 atomic_dec(&ma->mca_refcnt);
1459 ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING);
1460 spin_unlock(&ma->mca_lock);
1461 break;
1462 }
1463 }
1464 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465 return 0;
1466}
1467
Eric Dumazeta50feda2012-05-18 18:57:34 +00001468static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
1469 int gdeleted, int sdeleted)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470{
1471 switch (type) {
1472 case MLD2_MODE_IS_INCLUDE:
1473 case MLD2_MODE_IS_EXCLUDE:
1474 if (gdeleted || sdeleted)
Eric Dumazeta50feda2012-05-18 18:57:34 +00001475 return false;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001476 if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
1477 if (pmc->mca_sfmode == MCAST_INCLUDE)
Eric Dumazeta50feda2012-05-18 18:57:34 +00001478 return true;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001479 /* don't include if this source is excluded
1480 * in all filters
1481 */
1482 if (psf->sf_count[MCAST_INCLUDE])
David L Stevens7add2a42006-01-24 13:06:39 -08001483 return type == MLD2_MODE_IS_INCLUDE;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001484 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1485 psf->sf_count[MCAST_EXCLUDE];
1486 }
Eric Dumazeta50feda2012-05-18 18:57:34 +00001487 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 case MLD2_CHANGE_TO_INCLUDE:
1489 if (gdeleted || sdeleted)
Eric Dumazeta50feda2012-05-18 18:57:34 +00001490 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491 return psf->sf_count[MCAST_INCLUDE] != 0;
1492 case MLD2_CHANGE_TO_EXCLUDE:
1493 if (gdeleted || sdeleted)
Eric Dumazeta50feda2012-05-18 18:57:34 +00001494 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495 if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
1496 psf->sf_count[MCAST_INCLUDE])
Eric Dumazeta50feda2012-05-18 18:57:34 +00001497 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498 return pmc->mca_sfcount[MCAST_EXCLUDE] ==
1499 psf->sf_count[MCAST_EXCLUDE];
1500 case MLD2_ALLOW_NEW_SOURCES:
1501 if (gdeleted || !psf->sf_crcount)
Eric Dumazeta50feda2012-05-18 18:57:34 +00001502 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503 return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
1504 case MLD2_BLOCK_OLD_SOURCES:
1505 if (pmc->mca_sfmode == MCAST_INCLUDE)
1506 return gdeleted || (psf->sf_crcount && sdeleted);
1507 return psf->sf_crcount && !gdeleted && !sdeleted;
1508 }
Eric Dumazeta50feda2012-05-18 18:57:34 +00001509 return false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510}
1511
1512static int
1513mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
1514{
1515 struct ip6_sf_list *psf;
1516 int scount = 0;
1517
Ian Morris67ba4152014-08-24 21:53:10 +01001518 for (psf = pmc->mca_sources; psf; psf = psf->sf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519 if (!is_in(pmc, psf, type, gdeleted, sdeleted))
1520 continue;
1521 scount++;
1522 }
1523 return scount;
1524}
1525
YOSHIFUJI Hideaki / 吉藤英明2576f172013-01-21 06:48:19 +00001526static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb,
1527 struct net_device *dev,
1528 const struct in6_addr *saddr,
1529 const struct in6_addr *daddr,
1530 int proto, int len)
1531{
1532 struct ipv6hdr *hdr;
1533
1534 skb->protocol = htons(ETH_P_IPV6);
1535 skb->dev = dev;
1536
1537 skb_reset_network_header(skb);
1538 skb_put(skb, sizeof(struct ipv6hdr));
1539 hdr = ipv6_hdr(skb);
1540
1541 ip6_flow_hdr(hdr, 0, 0);
1542
1543 hdr->payload_len = htons(len);
1544 hdr->nexthdr = proto;
1545 hdr->hop_limit = inet6_sk(sk)->hop_limit;
1546
1547 hdr->saddr = *saddr;
1548 hdr->daddr = *daddr;
1549}
1550
Daniel Borkmann4c672e42014-11-05 20:27:38 +01001551static struct sk_buff *mld_newpack(struct inet6_dev *idev, unsigned int mtu)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552{
Amerigo Wang89657792013-06-29 21:30:49 +08001553 struct net_device *dev = idev->dev;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001554 struct net *net = dev_net(dev);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08001555 struct sock *sk = net->ipv6.igmp_sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556 struct sk_buff *skb;
1557 struct mld2_report *pmr;
1558 struct in6_addr addr_buf;
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09001559 const struct in6_addr *saddr;
Herbert Xua7ae1992011-11-18 02:20:04 +00001560 int hlen = LL_RESERVED_SPACE(dev);
1561 int tlen = dev->needed_tailroom;
Daniel Borkmann4c672e42014-11-05 20:27:38 +01001562 unsigned int size = mtu + hlen + tlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563 int err;
1564 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1565 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1566 IPV6_TLV_PADN, 0 };
1567
1568 /* we assume size > sizeof(ra) here */
Eric Dumazet72e09ad2010-06-05 03:03:30 -07001569 /* limit our allocations to order-0 page */
1570 size = min_t(int, size, SKB_MAX_ORDER(0, 0));
1571 skb = sock_alloc_send_skb(sk, size, 1, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572
Stephen Hemmingercfcabdc2007-10-09 01:59:42 -07001573 if (!skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574 return NULL;
1575
Hannes Frederic Sowa9d4a0312013-07-26 17:05:16 +02001576 skb->priority = TC_PRIO_CONTROL;
Daniel Borkmann4c672e42014-11-05 20:27:38 +01001577 skb->reserved_tailroom = skb_end_offset(skb) -
1578 min(mtu, skb_end_offset(skb));
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
David Miller7026b1d2015-04-05 22:19:04 -04001647 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT,
Eric W. Biederman29a26a52015-09-15 20:04:16 -05001648 net, net->ipv6.igmp_sk, skb, NULL, skb->dev,
Eric W. Biederman13206b62015-10-07 16:48:35 -05001649 dst_output);
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08001650out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651 if (!err) {
Hannes Frederic Sowa43a43b62014-03-31 20:14:10 +02001652 ICMP6MSGOUT_INC_STATS(net, idev, ICMPV6_MLD2_REPORT);
1653 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
Hannes Frederic Sowa43a43b62014-03-31 20:14:10 +02001654 } 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
Daniel Borkmann4c672e42014-11-05 20:27:38 +01001693#define AVAILABLE(skb) ((skb) ? skb_availroom(skb) : 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001694
1695static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
Flavio Leitner6a7cc412014-01-16 19:27:59 -02001696 int type, int gdeleted, int sdeleted, int crsend)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697{
Amerigo Wang89657792013-06-29 21:30:49 +08001698 struct inet6_dev *idev = pmc->idev;
1699 struct net_device *dev = idev->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700 struct mld2_report *pmr;
1701 struct mld2_grec *pgr = NULL;
1702 struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001703 int scount, stotal, first, isquery, truncate;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704
1705 if (pmc->mca_flags & MAF_NOREPORT)
1706 return skb;
1707
1708 isquery = type == MLD2_MODE_IS_INCLUDE ||
1709 type == MLD2_MODE_IS_EXCLUDE;
1710 truncate = type == MLD2_MODE_IS_EXCLUDE ||
1711 type == MLD2_CHANGE_TO_EXCLUDE;
1712
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001713 stotal = scount = 0;
1714
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
1716
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001717 if (!*psf_list)
1718 goto empty_source;
1719
Arnaldo Carvalho de Melo9c702202007-04-25 18:04:18 -07001720 pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721
1722 /* EX and TO_EX get a fresh packet, if needed */
1723 if (truncate) {
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001724 if (pmr && pmr->mld2r_ngrec &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725 AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
1726 if (skb)
1727 mld_sendpack(skb);
Amerigo Wang89657792013-06-29 21:30:49 +08001728 skb = mld_newpack(idev, dev->mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001729 }
1730 }
1731 first = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001732 psf_prev = NULL;
Ian Morris67ba4152014-08-24 21:53:10 +01001733 for (psf = *psf_list; psf; psf = psf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734 struct in6_addr *psrc;
1735
1736 psf_next = psf->sf_next;
1737
1738 if (!is_in(pmc, psf, type, gdeleted, sdeleted)) {
1739 psf_prev = psf;
1740 continue;
1741 }
1742
1743 /* clear marks on query responses */
1744 if (isquery)
1745 psf->sf_gsresp = 0;
1746
1747 if (AVAILABLE(skb) < sizeof(*psrc) +
1748 first*sizeof(struct mld2_grec)) {
1749 if (truncate && !first)
1750 break; /* truncate these */
1751 if (pgr)
1752 pgr->grec_nsrcs = htons(scount);
1753 if (skb)
1754 mld_sendpack(skb);
Amerigo Wang89657792013-06-29 21:30:49 +08001755 skb = mld_newpack(idev, dev->mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756 first = 1;
1757 scount = 0;
1758 }
1759 if (first) {
1760 skb = add_grhead(skb, pmc, type, &pgr);
1761 first = 0;
1762 }
Alexey Dobriyancc63f702007-02-06 14:35:25 -08001763 if (!skb)
1764 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc));
1766 *psrc = psf->sf_addr;
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001767 scount++; stotal++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768 if ((type == MLD2_ALLOW_NEW_SOURCES ||
1769 type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
1770 psf->sf_crcount--;
1771 if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
1772 if (psf_prev)
1773 psf_prev->sf_next = psf->sf_next;
1774 else
1775 *psf_list = psf->sf_next;
1776 kfree(psf);
1777 continue;
1778 }
1779 }
1780 psf_prev = psf;
1781 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001782
1783empty_source:
1784 if (!stotal) {
1785 if (type == MLD2_ALLOW_NEW_SOURCES ||
1786 type == MLD2_BLOCK_OLD_SOURCES)
1787 return skb;
Flavio Leitner6a7cc412014-01-16 19:27:59 -02001788 if (pmc->mca_crcount || isquery || crsend) {
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001789 /* make sure we have room for group header */
1790 if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
1791 mld_sendpack(skb);
1792 skb = NULL; /* add_grhead will get a new one */
1793 }
1794 skb = add_grhead(skb, pmc, type, &pgr);
1795 }
1796 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001797 if (pgr)
1798 pgr->grec_nsrcs = htons(scount);
1799
1800 if (isquery)
1801 pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
1802 return skb;
1803}
1804
1805static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
1806{
1807 struct sk_buff *skb = NULL;
1808 int type;
1809
Amerigo Wang89657792013-06-29 21:30:49 +08001810 read_lock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811 if (!pmc) {
Ian Morris67ba4152014-08-24 21:53:10 +01001812 for (pmc = idev->mc_list; pmc; pmc = pmc->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001813 if (pmc->mca_flags & MAF_NOREPORT)
1814 continue;
1815 spin_lock_bh(&pmc->mca_lock);
1816 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1817 type = MLD2_MODE_IS_EXCLUDE;
1818 else
1819 type = MLD2_MODE_IS_INCLUDE;
Flavio Leitner6a7cc412014-01-16 19:27:59 -02001820 skb = add_grec(skb, pmc, type, 0, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001821 spin_unlock_bh(&pmc->mca_lock);
1822 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001823 } else {
1824 spin_lock_bh(&pmc->mca_lock);
1825 if (pmc->mca_sfcount[MCAST_EXCLUDE])
1826 type = MLD2_MODE_IS_EXCLUDE;
1827 else
1828 type = MLD2_MODE_IS_INCLUDE;
Flavio Leitner6a7cc412014-01-16 19:27:59 -02001829 skb = add_grec(skb, pmc, type, 0, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001830 spin_unlock_bh(&pmc->mca_lock);
1831 }
Amerigo Wang89657792013-06-29 21:30:49 +08001832 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001833 if (skb)
1834 mld_sendpack(skb);
1835}
1836
1837/*
1838 * remove zero-count source records from a source filter list
1839 */
1840static void mld_clear_zeros(struct ip6_sf_list **ppsf)
1841{
1842 struct ip6_sf_list *psf_prev, *psf_next, *psf;
1843
1844 psf_prev = NULL;
Ian Morris67ba4152014-08-24 21:53:10 +01001845 for (psf = *ppsf; psf; psf = psf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001846 psf_next = psf->sf_next;
1847 if (psf->sf_crcount == 0) {
1848 if (psf_prev)
1849 psf_prev->sf_next = psf->sf_next;
1850 else
1851 *ppsf = psf->sf_next;
1852 kfree(psf);
1853 } else
1854 psf_prev = psf;
1855 }
1856}
1857
1858static void mld_send_cr(struct inet6_dev *idev)
1859{
1860 struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
1861 struct sk_buff *skb = NULL;
1862 int type, dtype;
1863
1864 read_lock_bh(&idev->lock);
Stephen Hemminger6457d262010-02-17 18:48:44 -08001865 spin_lock(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001866
1867 /* deleted MCA's */
1868 pmc_prev = NULL;
Ian Morris67ba4152014-08-24 21:53:10 +01001869 for (pmc = idev->mc_tomb; pmc; pmc = pmc_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870 pmc_next = pmc->next;
1871 if (pmc->mca_sfmode == MCAST_INCLUDE) {
1872 type = MLD2_BLOCK_OLD_SOURCES;
1873 dtype = MLD2_BLOCK_OLD_SOURCES;
Flavio Leitner6a7cc412014-01-16 19:27:59 -02001874 skb = add_grec(skb, pmc, type, 1, 0, 0);
1875 skb = add_grec(skb, pmc, dtype, 1, 1, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876 }
1877 if (pmc->mca_crcount) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001878 if (pmc->mca_sfmode == MCAST_EXCLUDE) {
1879 type = MLD2_CHANGE_TO_INCLUDE;
Flavio Leitner6a7cc412014-01-16 19:27:59 -02001880 skb = add_grec(skb, pmc, type, 1, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881 }
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001882 pmc->mca_crcount--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883 if (pmc->mca_crcount == 0) {
1884 mld_clear_zeros(&pmc->mca_tomb);
1885 mld_clear_zeros(&pmc->mca_sources);
1886 }
1887 }
1888 if (pmc->mca_crcount == 0 && !pmc->mca_tomb &&
1889 !pmc->mca_sources) {
1890 if (pmc_prev)
1891 pmc_prev->next = pmc_next;
1892 else
1893 idev->mc_tomb = pmc_next;
1894 in6_dev_put(pmc->idev);
1895 kfree(pmc);
1896 } else
1897 pmc_prev = pmc;
1898 }
Stephen Hemminger6457d262010-02-17 18:48:44 -08001899 spin_unlock(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001900
1901 /* change recs */
Ian Morris67ba4152014-08-24 21:53:10 +01001902 for (pmc = idev->mc_list; pmc; pmc = pmc->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903 spin_lock_bh(&pmc->mca_lock);
1904 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
1905 type = MLD2_BLOCK_OLD_SOURCES;
1906 dtype = MLD2_ALLOW_NEW_SOURCES;
1907 } else {
1908 type = MLD2_ALLOW_NEW_SOURCES;
1909 dtype = MLD2_BLOCK_OLD_SOURCES;
1910 }
Flavio Leitner6a7cc412014-01-16 19:27:59 -02001911 skb = add_grec(skb, pmc, type, 0, 0, 0);
1912 skb = add_grec(skb, pmc, dtype, 0, 1, 0); /* deleted sources */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913
1914 /* filter mode changes */
1915 if (pmc->mca_crcount) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001916 if (pmc->mca_sfmode == MCAST_EXCLUDE)
1917 type = MLD2_CHANGE_TO_EXCLUDE;
1918 else
1919 type = MLD2_CHANGE_TO_INCLUDE;
Flavio Leitner6a7cc412014-01-16 19:27:59 -02001920 skb = add_grec(skb, pmc, type, 0, 0, 0);
David L Stevens5ab4a6c2005-12-27 14:03:00 -08001921 pmc->mca_crcount--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922 }
1923 spin_unlock_bh(&pmc->mca_lock);
1924 }
1925 read_unlock_bh(&idev->lock);
1926 if (!skb)
1927 return;
1928 (void) mld_sendpack(skb);
1929}
1930
1931static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
1932{
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001933 struct net *net = dev_net(dev);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08001934 struct sock *sk = net->ipv6.igmp_sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001935 struct inet6_dev *idev;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001936 struct sk_buff *skb;
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001937 struct mld_msg *hdr;
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09001938 const struct in6_addr *snd_addr, *saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001939 struct in6_addr addr_buf;
Herbert Xua7ae1992011-11-18 02:20:04 +00001940 int hlen = LL_RESERVED_SPACE(dev);
1941 int tlen = dev->needed_tailroom;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001942 int err, len, payload_len, full_len;
1943 u8 ra[8] = { IPPROTO_ICMPV6, 0,
1944 IPV6_TLV_ROUTERALERT, 2, 0, 0,
1945 IPV6_TLV_PADN, 0 };
David S. Miller4c9483b2011-03-12 16:22:43 -05001946 struct flowi6 fl6;
Eric Dumazetadf30902009-06-02 05:19:30 +00001947 struct dst_entry *dst;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001948
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +09001949 if (type == ICMPV6_MGM_REDUCTION)
1950 snd_addr = &in6addr_linklocal_allrouters;
1951 else
1952 snd_addr = addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953
1954 len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
1955 payload_len = len + sizeof(ra);
1956 full_len = sizeof(struct ipv6hdr) + payload_len;
1957
Neil Hormanedf391f2009-04-27 02:45:02 -07001958 rcu_read_lock();
1959 IP6_UPD_PO_STATS(net, __in6_dev_get(dev),
1960 IPSTATS_MIB_OUT, full_len);
1961 rcu_read_unlock();
1962
Herbert Xua7ae1992011-11-18 02:20:04 +00001963 skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001964
Ian Morris63159f22015-03-29 14:00:04 +01001965 if (!skb) {
YOSHIFUJI Hideakia11d2062006-11-04 20:11:37 +09001966 rcu_read_lock();
Denis V. Lunev3bd653c2008-10-08 10:54:51 -07001967 IP6_INC_STATS(net, __in6_dev_get(dev),
YOSHIFUJI Hideakia11d2062006-11-04 20:11:37 +09001968 IPSTATS_MIB_OUTDISCARDS);
1969 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001970 return;
1971 }
Hannes Frederic Sowa9d4a0312013-07-26 17:05:16 +02001972 skb->priority = TC_PRIO_CONTROL;
Herbert Xua7ae1992011-11-18 02:20:04 +00001973 skb_reserve(skb, hlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001974
Neil Horman95c385b2007-04-25 17:08:10 -07001975 if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001976 /* <draft-ietf-magma-mld-source-05.txt>:
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001977 * use unspecified address as the source address
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978 * when a valid link-local address is not available.
1979 */
YOSHIFUJI Hideakid7aabf22008-04-10 15:42:11 +09001980 saddr = &in6addr_any;
1981 } else
1982 saddr = &addr_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001983
YOSHIFUJI Hideaki / 吉藤英明2576f172013-01-21 06:48:19 +00001984 ip6_mc_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001985
1986 memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra));
1987
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001988 hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg));
1989 memset(hdr, 0, sizeof(struct mld_msg));
1990 hdr->mld_type = type;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +00001991 hdr->mld_mca = *addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992
YOSHIFUJI Hideaki6e7cb832010-04-18 12:42:05 +09001993 hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len,
1994 IPPROTO_ICMPV6,
1995 csum_partial(hdr, len, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001996
Eric Dumazet96b52e62010-06-07 21:05:02 +00001997 rcu_read_lock();
1998 idev = __in6_dev_get(skb->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999
David S. Miller4c9483b2011-03-12 16:22:43 -05002000 icmpv6_flow_init(sk, &fl6, type,
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08002001 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
2002 skb->dev->ifindex);
YOSHIFUJI Hideaki / 吉藤英明12fd84f2013-01-18 02:00:24 +00002003 dst = icmp6_dst_alloc(skb->dev, &fl6);
David S. Miller452edd52011-03-02 13:27:41 -08002004 if (IS_ERR(dst)) {
2005 err = PTR_ERR(dst);
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08002006 goto err_out;
David S. Miller452edd52011-03-02 13:27:41 -08002007 }
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08002008
Eric Dumazetadf30902009-06-02 05:19:30 +00002009 skb_dst_set(skb, dst);
Eric W. Biederman29a26a52015-09-15 20:04:16 -05002010 err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT,
2011 net, sk, skb, NULL, skb->dev,
Eric W. Biederman13206b62015-10-07 16:48:35 -05002012 dst_output);
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08002013out:
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);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017 } else
Denis V. Lunev3bd653c2008-10-08 10:54:51 -07002018 IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002019
Eric Dumazet96b52e62010-06-07 21:05:02 +00002020 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002021 return;
YOSHIFUJI Hideaki41927172007-12-06 17:40:56 -08002022
2023err_out:
2024 kfree_skb(skb);
2025 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002026}
2027
Flavio Leitner6a7cc412014-01-16 19:27:59 -02002028static void mld_send_initial_cr(struct inet6_dev *idev)
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02002029{
Flavio Leitner6a7cc412014-01-16 19:27:59 -02002030 struct sk_buff *skb;
2031 struct ifmcaddr6 *pmc;
2032 int type;
2033
2034 if (mld_in_v1_mode(idev))
2035 return;
2036
2037 skb = NULL;
2038 read_lock_bh(&idev->lock);
Ian Morris67ba4152014-08-24 21:53:10 +01002039 for (pmc = idev->mc_list; pmc; pmc = pmc->next) {
Flavio Leitner6a7cc412014-01-16 19:27:59 -02002040 spin_lock_bh(&pmc->mca_lock);
2041 if (pmc->mca_sfcount[MCAST_EXCLUDE])
2042 type = MLD2_CHANGE_TO_EXCLUDE;
2043 else
2044 type = MLD2_CHANGE_TO_INCLUDE;
2045 skb = add_grec(skb, pmc, type, 0, 0, 1);
2046 spin_unlock_bh(&pmc->mca_lock);
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02002047 }
Flavio Leitner6a7cc412014-01-16 19:27:59 -02002048 read_unlock_bh(&idev->lock);
2049 if (skb)
2050 mld_sendpack(skb);
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02002051}
2052
2053void ipv6_mc_dad_complete(struct inet6_dev *idev)
2054{
2055 idev->mc_dad_count = idev->mc_qrv;
2056 if (idev->mc_dad_count) {
Flavio Leitner6a7cc412014-01-16 19:27:59 -02002057 mld_send_initial_cr(idev);
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02002058 idev->mc_dad_count--;
2059 if (idev->mc_dad_count)
2060 mld_dad_start_timer(idev, idev->mc_maxdelay);
2061 }
2062}
2063
2064static void mld_dad_timer_expire(unsigned long data)
2065{
2066 struct inet6_dev *idev = (struct inet6_dev *)data;
2067
Flavio Leitner6a7cc412014-01-16 19:27:59 -02002068 mld_send_initial_cr(idev);
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02002069 if (idev->mc_dad_count) {
2070 idev->mc_dad_count--;
2071 if (idev->mc_dad_count)
2072 mld_dad_start_timer(idev, idev->mc_maxdelay);
2073 }
Salam Noureddine9260d3e2013-09-29 13:41:34 -07002074 in6_dev_put(idev);
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02002075}
2076
Linus Torvalds1da177e2005-04-16 15:20:36 -07002077static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002078 const struct in6_addr *psfsrc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002079{
2080 struct ip6_sf_list *psf, *psf_prev;
2081 int rv = 0;
2082
2083 psf_prev = NULL;
Ian Morris67ba4152014-08-24 21:53:10 +01002084 for (psf = pmc->mca_sources; psf; psf = psf->sf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002085 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
2086 break;
2087 psf_prev = psf;
2088 }
2089 if (!psf || psf->sf_count[sfmode] == 0) {
2090 /* source filter not found, or count wrong => bug */
2091 return -ESRCH;
2092 }
2093 psf->sf_count[sfmode]--;
2094 if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
2095 struct inet6_dev *idev = pmc->idev;
2096
2097 /* no more filters for this source */
2098 if (psf_prev)
2099 psf_prev->sf_next = psf->sf_next;
2100 else
2101 pmc->mca_sources = psf->sf_next;
2102 if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
Daniel Borkmann6c567b72013-09-04 00:19:38 +02002103 !mld_in_v1_mode(idev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002104 psf->sf_crcount = idev->mc_qrv;
2105 psf->sf_next = pmc->mca_tomb;
2106 pmc->mca_tomb = psf;
2107 rv = 1;
2108 } else
2109 kfree(psf);
2110 }
2111 return rv;
2112}
2113
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002114static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
2115 int sfmode, int sfcount, const struct in6_addr *psfsrc,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116 int delta)
2117{
2118 struct ifmcaddr6 *pmc;
2119 int changerec = 0;
2120 int i, err;
2121
2122 if (!idev)
2123 return -ENODEV;
2124 read_lock_bh(&idev->lock);
Ian Morris67ba4152014-08-24 21:53:10 +01002125 for (pmc = idev->mc_list; pmc; pmc = pmc->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2127 break;
2128 }
2129 if (!pmc) {
2130 /* MCA not found?? bug */
2131 read_unlock_bh(&idev->lock);
2132 return -ESRCH;
2133 }
2134 spin_lock_bh(&pmc->mca_lock);
2135 sf_markstate(pmc);
2136 if (!delta) {
2137 if (!pmc->mca_sfcount[sfmode]) {
2138 spin_unlock_bh(&pmc->mca_lock);
2139 read_unlock_bh(&idev->lock);
2140 return -EINVAL;
2141 }
2142 pmc->mca_sfcount[sfmode]--;
2143 }
2144 err = 0;
Ian Morris67ba4152014-08-24 21:53:10 +01002145 for (i = 0; i < sfcount; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002146 int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
2147
2148 changerec |= rv > 0;
2149 if (!err && rv < 0)
2150 err = rv;
2151 }
2152 if (pmc->mca_sfmode == MCAST_EXCLUDE &&
2153 pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
2154 pmc->mca_sfcount[MCAST_INCLUDE]) {
2155 struct ip6_sf_list *psf;
2156
2157 /* filter mode change */
2158 pmc->mca_sfmode = MCAST_INCLUDE;
2159 pmc->mca_crcount = idev->mc_qrv;
2160 idev->mc_ifc_count = pmc->mca_crcount;
Ian Morris67ba4152014-08-24 21:53:10 +01002161 for (psf = pmc->mca_sources; psf; psf = psf->sf_next)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002162 psf->sf_crcount = 0;
2163 mld_ifc_event(pmc->idev);
2164 } else if (sf_setstate(pmc) || changerec)
2165 mld_ifc_event(pmc->idev);
2166 spin_unlock_bh(&pmc->mca_lock);
2167 read_unlock_bh(&idev->lock);
2168 return err;
2169}
2170
2171/*
2172 * Add multicast single-source filter to the interface list
2173 */
2174static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
Jun Zhao99d2f472011-11-30 06:21:05 +00002175 const struct in6_addr *psfsrc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002176{
2177 struct ip6_sf_list *psf, *psf_prev;
2178
2179 psf_prev = NULL;
Ian Morris67ba4152014-08-24 21:53:10 +01002180 for (psf = pmc->mca_sources; psf; psf = psf->sf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002181 if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
2182 break;
2183 psf_prev = psf;
2184 }
2185 if (!psf) {
Ingo Oeser0c600ed2006-03-20 23:01:32 -08002186 psf = kzalloc(sizeof(*psf), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002187 if (!psf)
2188 return -ENOBUFS;
Ingo Oeser0c600ed2006-03-20 23:01:32 -08002189
Linus Torvalds1da177e2005-04-16 15:20:36 -07002190 psf->sf_addr = *psfsrc;
2191 if (psf_prev) {
2192 psf_prev->sf_next = psf;
2193 } else
2194 pmc->mca_sources = psf;
2195 }
2196 psf->sf_count[sfmode]++;
2197 return 0;
2198}
2199
2200static void sf_markstate(struct ifmcaddr6 *pmc)
2201{
2202 struct ip6_sf_list *psf;
2203 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
2204
Ian Morris67ba4152014-08-24 21:53:10 +01002205 for (psf = pmc->mca_sources; psf; psf = psf->sf_next)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002206 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
2207 psf->sf_oldin = mca_xcount ==
2208 psf->sf_count[MCAST_EXCLUDE] &&
2209 !psf->sf_count[MCAST_INCLUDE];
2210 } else
2211 psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
2212}
2213
2214static int sf_setstate(struct ifmcaddr6 *pmc)
2215{
David L Stevens7add2a42006-01-24 13:06:39 -08002216 struct ip6_sf_list *psf, *dpsf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002217 int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
2218 int qrv = pmc->idev->mc_qrv;
2219 int new_in, rv;
2220
2221 rv = 0;
Ian Morris67ba4152014-08-24 21:53:10 +01002222 for (psf = pmc->mca_sources; psf; psf = psf->sf_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223 if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
2224 new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
2225 !psf->sf_count[MCAST_INCLUDE];
2226 } else
2227 new_in = psf->sf_count[MCAST_INCLUDE] != 0;
David L Stevens7add2a42006-01-24 13:06:39 -08002228 if (new_in) {
2229 if (!psf->sf_oldin) {
Al Viroe80e28b2006-02-03 20:10:03 -05002230 struct ip6_sf_list *prev = NULL;
David L Stevens7add2a42006-01-24 13:06:39 -08002231
Ian Morris67ba4152014-08-24 21:53:10 +01002232 for (dpsf = pmc->mca_tomb; dpsf;
2233 dpsf = dpsf->sf_next) {
David L Stevens7add2a42006-01-24 13:06:39 -08002234 if (ipv6_addr_equal(&dpsf->sf_addr,
2235 &psf->sf_addr))
2236 break;
2237 prev = dpsf;
2238 }
2239 if (dpsf) {
2240 if (prev)
2241 prev->sf_next = dpsf->sf_next;
2242 else
2243 pmc->mca_tomb = dpsf->sf_next;
2244 kfree(dpsf);
2245 }
2246 psf->sf_crcount = qrv;
2247 rv++;
2248 }
2249 } else if (psf->sf_oldin) {
2250 psf->sf_crcount = 0;
2251 /*
2252 * add or update "delete" records if an active filter
2253 * is now inactive
2254 */
Ian Morris67ba4152014-08-24 21:53:10 +01002255 for (dpsf = pmc->mca_tomb; dpsf; dpsf = dpsf->sf_next)
David L Stevens7add2a42006-01-24 13:06:39 -08002256 if (ipv6_addr_equal(&dpsf->sf_addr,
2257 &psf->sf_addr))
2258 break;
2259 if (!dpsf) {
Joe Perches5d553542010-05-31 17:23:22 +00002260 dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC);
David L Stevens7add2a42006-01-24 13:06:39 -08002261 if (!dpsf)
2262 continue;
2263 *dpsf = *psf;
2264 /* pmc->mca_lock held by callers */
2265 dpsf->sf_next = pmc->mca_tomb;
2266 pmc->mca_tomb = dpsf;
2267 }
2268 dpsf->sf_crcount = qrv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002269 rv++;
2270 }
2271 }
2272 return rv;
2273}
2274
2275/*
2276 * Add multicast source filter list to the interface list
2277 */
Eric Dumazetb71d1d42011-04-22 04:53:02 +00002278static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
2279 int sfmode, int sfcount, const struct in6_addr *psfsrc,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002280 int delta)
2281{
2282 struct ifmcaddr6 *pmc;
2283 int isexclude;
2284 int i, err;
2285
2286 if (!idev)
2287 return -ENODEV;
2288 read_lock_bh(&idev->lock);
Ian Morris67ba4152014-08-24 21:53:10 +01002289 for (pmc = idev->mc_list; pmc; pmc = pmc->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002290 if (ipv6_addr_equal(pmca, &pmc->mca_addr))
2291 break;
2292 }
2293 if (!pmc) {
2294 /* MCA not found?? bug */
2295 read_unlock_bh(&idev->lock);
2296 return -ESRCH;
2297 }
2298 spin_lock_bh(&pmc->mca_lock);
2299
2300 sf_markstate(pmc);
2301 isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
2302 if (!delta)
2303 pmc->mca_sfcount[sfmode]++;
2304 err = 0;
Ian Morris67ba4152014-08-24 21:53:10 +01002305 for (i = 0; i < sfcount; i++) {
Jun Zhao99d2f472011-11-30 06:21:05 +00002306 err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002307 if (err)
2308 break;
2309 }
2310 if (err) {
2311 int j;
2312
2313 if (!delta)
2314 pmc->mca_sfcount[sfmode]--;
Ian Morris67ba4152014-08-24 21:53:10 +01002315 for (j = 0; j < i; j++)
RongQing.Li78d50212012-04-04 16:47:04 +00002316 ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002317 } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002318 struct ip6_sf_list *psf;
2319
2320 /* filter mode change */
2321 if (pmc->mca_sfcount[MCAST_EXCLUDE])
2322 pmc->mca_sfmode = MCAST_EXCLUDE;
2323 else if (pmc->mca_sfcount[MCAST_INCLUDE])
2324 pmc->mca_sfmode = MCAST_INCLUDE;
2325 /* else no filters; keep old mode for reports */
2326
2327 pmc->mca_crcount = idev->mc_qrv;
2328 idev->mc_ifc_count = pmc->mca_crcount;
Ian Morris67ba4152014-08-24 21:53:10 +01002329 for (psf = pmc->mca_sources; psf; psf = psf->sf_next)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002330 psf->sf_crcount = 0;
2331 mld_ifc_event(idev);
2332 } else if (sf_setstate(pmc))
2333 mld_ifc_event(idev);
2334 spin_unlock_bh(&pmc->mca_lock);
2335 read_unlock_bh(&idev->lock);
2336 return err;
2337}
2338
2339static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
2340{
2341 struct ip6_sf_list *psf, *nextpsf;
2342
Ian Morris67ba4152014-08-24 21:53:10 +01002343 for (psf = pmc->mca_tomb; psf; psf = nextpsf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002344 nextpsf = psf->sf_next;
2345 kfree(psf);
2346 }
2347 pmc->mca_tomb = NULL;
Ian Morris67ba4152014-08-24 21:53:10 +01002348 for (psf = pmc->mca_sources; psf; psf = nextpsf) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002349 nextpsf = psf->sf_next;
2350 kfree(psf);
2351 }
2352 pmc->mca_sources = NULL;
2353 pmc->mca_sfmode = MCAST_EXCLUDE;
Denis Lukianovde9daad2005-09-14 20:53:42 -07002354 pmc->mca_sfcount[MCAST_INCLUDE] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002355 pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
2356}
2357
2358
2359static void igmp6_join_group(struct ifmcaddr6 *ma)
2360{
2361 unsigned long delay;
2362
2363 if (ma->mca_flags & MAF_NOREPORT)
2364 return;
2365
2366 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2367
Aruna-Hewapathirane63862b52014-01-11 07:15:59 -05002368 delay = prandom_u32() % unsolicited_report_interval(ma->idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002369
2370 spin_lock_bh(&ma->mca_lock);
2371 if (del_timer(&ma->mca_timer)) {
2372 atomic_dec(&ma->mca_refcnt);
2373 delay = ma->mca_timer.expires - jiffies;
2374 }
2375
2376 if (!mod_timer(&ma->mca_timer, jiffies + delay))
2377 atomic_inc(&ma->mca_refcnt);
2378 ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
2379 spin_unlock_bh(&ma->mca_lock);
2380}
2381
2382static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
2383 struct inet6_dev *idev)
2384{
2385 int err;
2386
WANG Congf7ed9252014-09-11 15:35:15 -07002387 /* callers have the socket lock and rtnl lock
David L Stevens5ab4a6c2005-12-27 14:03:00 -08002388 * so no other readers or writers of iml or its sflist
2389 */
Stephen Hemmingercfcabdc2007-10-09 01:59:42 -07002390 if (!iml->sflist) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002391 /* any-source empty exclude case */
2392 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
2393 }
2394 err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
2395 iml->sflist->sl_count, iml->sflist->sl_addr, 0);
2396 sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max));
2397 iml->sflist = NULL;
2398 return err;
2399}
2400
2401static void igmp6_leave_group(struct ifmcaddr6 *ma)
2402{
Daniel Borkmann6c567b72013-09-04 00:19:38 +02002403 if (mld_in_v1_mode(ma->idev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002404 if (ma->mca_flags & MAF_LAST_REPORTER)
2405 igmp6_send(&ma->mca_addr, ma->idev->dev,
2406 ICMPV6_MGM_REDUCTION);
2407 } else {
2408 mld_add_delrec(ma->idev, ma);
2409 mld_ifc_event(ma->idev);
2410 }
2411}
2412
2413static void mld_gq_timer_expire(unsigned long data)
2414{
2415 struct inet6_dev *idev = (struct inet6_dev *)data;
2416
2417 idev->mc_gq_running = 0;
2418 mld_send_report(idev, NULL);
Salam Noureddine9260d3e2013-09-29 13:41:34 -07002419 in6_dev_put(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002420}
2421
2422static void mld_ifc_timer_expire(unsigned long data)
2423{
2424 struct inet6_dev *idev = (struct inet6_dev *)data;
2425
2426 mld_send_cr(idev);
2427 if (idev->mc_ifc_count) {
2428 idev->mc_ifc_count--;
2429 if (idev->mc_ifc_count)
2430 mld_ifc_start_timer(idev, idev->mc_maxdelay);
2431 }
Salam Noureddine9260d3e2013-09-29 13:41:34 -07002432 in6_dev_put(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002433}
2434
2435static void mld_ifc_event(struct inet6_dev *idev)
2436{
Daniel Borkmann6c567b72013-09-04 00:19:38 +02002437 if (mld_in_v1_mode(idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002438 return;
2439 idev->mc_ifc_count = idev->mc_qrv;
2440 mld_ifc_start_timer(idev, 1);
2441}
2442
2443
2444static void igmp6_timer_handler(unsigned long data)
2445{
2446 struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data;
2447
Daniel Borkmann6c567b72013-09-04 00:19:38 +02002448 if (mld_in_v1_mode(ma->idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002449 igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
2450 else
2451 mld_send_report(ma->idev, ma);
2452
2453 spin_lock(&ma->mca_lock);
2454 ma->mca_flags |= MAF_LAST_REPORTER;
2455 ma->mca_flags &= ~MAF_TIMER_RUNNING;
2456 spin_unlock(&ma->mca_lock);
2457 ma_put(ma);
2458}
2459
Moni Shoua75c78502009-09-15 02:37:40 -07002460/* Device changing type */
2461
2462void ipv6_mc_unmap(struct inet6_dev *idev)
2463{
2464 struct ifmcaddr6 *i;
2465
2466 /* Install multicast list, except for all-nodes (already installed) */
2467
2468 read_lock_bh(&idev->lock);
2469 for (i = idev->mc_list; i; i = i->next)
2470 igmp6_group_dropped(i);
2471 read_unlock_bh(&idev->lock);
2472}
2473
2474void ipv6_mc_remap(struct inet6_dev *idev)
2475{
2476 ipv6_mc_up(idev);
2477}
2478
Linus Torvalds1da177e2005-04-16 15:20:36 -07002479/* Device going down */
2480
2481void ipv6_mc_down(struct inet6_dev *idev)
2482{
2483 struct ifmcaddr6 *i;
2484
2485 /* Withdraw multicast list */
2486
2487 read_lock_bh(&idev->lock);
Daniel Borkmannb4af8de2013-09-04 00:19:43 +02002488 mld_ifc_stop_timer(idev);
2489 mld_gq_stop_timer(idev);
2490 mld_dad_stop_timer(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002491
Ian Morris67ba4152014-08-24 21:53:10 +01002492 for (i = idev->mc_list; i; i = i->next)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002493 igmp6_group_dropped(i);
2494 read_unlock_bh(&idev->lock);
2495
2496 mld_clear_delrec(idev);
2497}
2498
Hannes Frederic Sowa2f711932014-09-02 15:49:25 +02002499static void ipv6_mc_reset(struct inet6_dev *idev)
2500{
2501 idev->mc_qrv = sysctl_mld_qrv;
2502 idev->mc_qi = MLD_QI_DEFAULT;
2503 idev->mc_qri = MLD_QRI_DEFAULT;
2504 idev->mc_v1_seen = 0;
2505 idev->mc_maxdelay = unsolicited_report_interval(idev);
2506}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002507
2508/* Device going up */
2509
2510void ipv6_mc_up(struct inet6_dev *idev)
2511{
2512 struct ifmcaddr6 *i;
2513
2514 /* Install multicast list, except for all-nodes (already installed) */
2515
2516 read_lock_bh(&idev->lock);
Hannes Frederic Sowa2f711932014-09-02 15:49:25 +02002517 ipv6_mc_reset(idev);
Ian Morris67ba4152014-08-24 21:53:10 +01002518 for (i = idev->mc_list; i; i = i->next)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002519 igmp6_group_added(i);
2520 read_unlock_bh(&idev->lock);
2521}
2522
2523/* IPv6 device initialization. */
2524
2525void ipv6_mc_init_dev(struct inet6_dev *idev)
2526{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002527 write_lock_bh(&idev->lock);
Stephen Hemminger6457d262010-02-17 18:48:44 -08002528 spin_lock_init(&idev->mc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002529 idev->mc_gq_running = 0;
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -08002530 setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire,
2531 (unsigned long)idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002532 idev->mc_tomb = NULL;
2533 idev->mc_ifc_count = 0;
Pavel Emelyanovb24b8a22008-01-23 21:20:07 -08002534 setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire,
2535 (unsigned long)idev);
Hannes Frederic Sowab173ee42013-06-27 00:07:01 +02002536 setup_timer(&idev->mc_dad_timer, mld_dad_timer_expire,
2537 (unsigned long)idev);
Hannes Frederic Sowa2f711932014-09-02 15:49:25 +02002538 ipv6_mc_reset(idev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002539 write_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002540}
2541
2542/*
2543 * Device is about to be destroyed: clean up.
2544 */
2545
2546void ipv6_mc_destroy_dev(struct inet6_dev *idev)
2547{
2548 struct ifmcaddr6 *i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002549
2550 /* Deactivate timers */
2551 ipv6_mc_down(idev);
2552
2553 /* Delete all-nodes address. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002554 /* We cannot call ipv6_dev_mc_dec() directly, our caller in
2555 * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
2556 * fail.
2557 */
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +09002558 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002559
YOSHIFUJI Hideakif3ee4012008-04-10 15:42:11 +09002560 if (idev->cnf.forwarding)
2561 __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002562
2563 write_lock_bh(&idev->lock);
2564 while ((i = idev->mc_list) != NULL) {
2565 idev->mc_list = i->next;
2566 write_unlock_bh(&idev->lock);
2567
2568 igmp6_group_dropped(i);
2569 ma_put(i);
2570
2571 write_lock_bh(&idev->lock);
2572 }
2573 write_unlock_bh(&idev->lock);
2574}
2575
2576#ifdef CONFIG_PROC_FS
2577struct igmp6_mc_iter_state {
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002578 struct seq_net_private p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002579 struct net_device *dev;
2580 struct inet6_dev *idev;
2581};
2582
2583#define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
2584
2585static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
2586{
2587 struct ifmcaddr6 *im = NULL;
2588 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09002589 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002590
Pavel Emelianov7562f872007-05-03 15:13:45 -07002591 state->idev = NULL;
Eric Dumazetce81b762009-11-11 17:34:30 +00002592 for_each_netdev_rcu(net, state->dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002593 struct inet6_dev *idev;
Eric Dumazetce81b762009-11-11 17:34:30 +00002594 idev = __in6_dev_get(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002595 if (!idev)
2596 continue;
2597 read_lock_bh(&idev->lock);
2598 im = idev->mc_list;
2599 if (im) {
2600 state->idev = idev;
2601 break;
2602 }
2603 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002604 }
2605 return im;
2606}
2607
2608static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
2609{
2610 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2611
2612 im = im->next;
2613 while (!im) {
Ian Morris53b24b82015-03-29 14:00:05 +01002614 if (likely(state->idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002615 read_unlock_bh(&state->idev->lock);
Eric Dumazetce81b762009-11-11 17:34:30 +00002616
2617 state->dev = next_net_device_rcu(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002618 if (!state->dev) {
2619 state->idev = NULL;
2620 break;
2621 }
Eric Dumazetce81b762009-11-11 17:34:30 +00002622 state->idev = __in6_dev_get(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002623 if (!state->idev)
2624 continue;
2625 read_lock_bh(&state->idev->lock);
2626 im = state->idev->mc_list;
2627 }
2628 return im;
2629}
2630
2631static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
2632{
2633 struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
2634 if (im)
2635 while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
2636 --pos;
2637 return pos ? NULL : im;
2638}
2639
2640static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazetce81b762009-11-11 17:34:30 +00002641 __acquires(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002642{
Eric Dumazetce81b762009-11-11 17:34:30 +00002643 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002644 return igmp6_mc_get_idx(seq, *pos);
2645}
2646
2647static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2648{
Eric Dumazetce81b762009-11-11 17:34:30 +00002649 struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v);
2650
Linus Torvalds1da177e2005-04-16 15:20:36 -07002651 ++*pos;
2652 return im;
2653}
2654
2655static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
Eric Dumazetce81b762009-11-11 17:34:30 +00002656 __releases(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002657{
2658 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
Eric Dumazetce81b762009-11-11 17:34:30 +00002659
Ian Morris53b24b82015-03-29 14:00:05 +01002660 if (likely(state->idev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002661 read_unlock_bh(&state->idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002662 state->idev = NULL;
2663 }
2664 state->dev = NULL;
Eric Dumazetce81b762009-11-11 17:34:30 +00002665 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002666}
2667
2668static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
2669{
2670 struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
2671 struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
2672
2673 seq_printf(seq,
Harvey Harrison4b7a4272008-10-29 12:50:24 -07002674 "%-4d %-15s %pi6 %5d %08X %ld\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002675 state->dev->ifindex, state->dev->name,
Harvey Harrisonb0711952008-10-28 16:05:40 -07002676 &im->mca_addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002677 im->mca_users, im->mca_flags,
2678 (im->mca_flags&MAF_TIMER_RUNNING) ?
2679 jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0);
2680 return 0;
2681}
2682
Philippe De Muyter56b3d972007-07-10 23:07:31 -07002683static const struct seq_operations igmp6_mc_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002684 .start = igmp6_mc_seq_start,
2685 .next = igmp6_mc_seq_next,
2686 .stop = igmp6_mc_seq_stop,
2687 .show = igmp6_mc_seq_show,
2688};
2689
2690static int igmp6_mc_seq_open(struct inode *inode, struct file *file)
2691{
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002692 return seq_open_net(inode, file, &igmp6_mc_seq_ops,
2693 sizeof(struct igmp6_mc_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002694}
2695
Arjan van de Ven9a321442007-02-12 00:55:35 -08002696static const struct file_operations igmp6_mc_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002697 .owner = THIS_MODULE,
2698 .open = igmp6_mc_seq_open,
2699 .read = seq_read,
2700 .llseek = seq_lseek,
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002701 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002702};
2703
2704struct igmp6_mcf_iter_state {
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002705 struct seq_net_private p;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002706 struct net_device *dev;
2707 struct inet6_dev *idev;
2708 struct ifmcaddr6 *im;
2709};
2710
2711#define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
2712
2713static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
2714{
2715 struct ip6_sf_list *psf = NULL;
2716 struct ifmcaddr6 *im = NULL;
2717 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +09002718 struct net *net = seq_file_net(seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002719
Pavel Emelianov7562f872007-05-03 15:13:45 -07002720 state->idev = NULL;
2721 state->im = NULL;
Eric Dumazetce81b762009-11-11 17:34:30 +00002722 for_each_netdev_rcu(net, state->dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002723 struct inet6_dev *idev;
Eric Dumazetce81b762009-11-11 17:34:30 +00002724 idev = __in6_dev_get(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002725 if (unlikely(idev == NULL))
2726 continue;
2727 read_lock_bh(&idev->lock);
2728 im = idev->mc_list;
Ian Morris53b24b82015-03-29 14:00:05 +01002729 if (likely(im)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002730 spin_lock_bh(&im->mca_lock);
2731 psf = im->mca_sources;
Ian Morris53b24b82015-03-29 14:00:05 +01002732 if (likely(psf)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002733 state->im = im;
2734 state->idev = idev;
2735 break;
2736 }
2737 spin_unlock_bh(&im->mca_lock);
2738 }
2739 read_unlock_bh(&idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002740 }
2741 return psf;
2742}
2743
2744static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
2745{
2746 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2747
2748 psf = psf->sf_next;
2749 while (!psf) {
2750 spin_unlock_bh(&state->im->mca_lock);
2751 state->im = state->im->next;
2752 while (!state->im) {
Ian Morris53b24b82015-03-29 14:00:05 +01002753 if (likely(state->idev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002754 read_unlock_bh(&state->idev->lock);
Eric Dumazetce81b762009-11-11 17:34:30 +00002755
2756 state->dev = next_net_device_rcu(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002757 if (!state->dev) {
2758 state->idev = NULL;
2759 goto out;
2760 }
Eric Dumazetce81b762009-11-11 17:34:30 +00002761 state->idev = __in6_dev_get(state->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002762 if (!state->idev)
2763 continue;
2764 read_lock_bh(&state->idev->lock);
2765 state->im = state->idev->mc_list;
2766 }
2767 if (!state->im)
2768 break;
2769 spin_lock_bh(&state->im->mca_lock);
2770 psf = state->im->mca_sources;
2771 }
2772out:
2773 return psf;
2774}
2775
2776static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
2777{
2778 struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
2779 if (psf)
2780 while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
2781 --pos;
2782 return pos ? NULL : psf;
2783}
2784
2785static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazetce81b762009-11-11 17:34:30 +00002786 __acquires(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002787{
Eric Dumazetce81b762009-11-11 17:34:30 +00002788 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002789 return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
2790}
2791
2792static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2793{
2794 struct ip6_sf_list *psf;
2795 if (v == SEQ_START_TOKEN)
2796 psf = igmp6_mcf_get_first(seq);
2797 else
2798 psf = igmp6_mcf_get_next(seq, v);
2799 ++*pos;
2800 return psf;
2801}
2802
2803static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
Eric Dumazetce81b762009-11-11 17:34:30 +00002804 __releases(RCU)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002805{
2806 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
Ian Morris53b24b82015-03-29 14:00:05 +01002807 if (likely(state->im)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002808 spin_unlock_bh(&state->im->mca_lock);
2809 state->im = NULL;
2810 }
Ian Morris53b24b82015-03-29 14:00:05 +01002811 if (likely(state->idev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002812 read_unlock_bh(&state->idev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002813 state->idev = NULL;
2814 }
2815 state->dev = NULL;
Eric Dumazetce81b762009-11-11 17:34:30 +00002816 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002817}
2818
2819static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
2820{
2821 struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
2822 struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
2823
2824 if (v == SEQ_START_TOKEN) {
Joe Perches1744bea2014-11-04 15:37:03 -08002825 seq_puts(seq, "Idx Device Multicast Address Source Address INC EXC\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002826 } else {
2827 seq_printf(seq,
Harvey Harrison4b7a4272008-10-29 12:50:24 -07002828 "%3d %6.6s %pi6 %pi6 %6lu %6lu\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002829 state->dev->ifindex, state->dev->name,
Harvey Harrisonb0711952008-10-28 16:05:40 -07002830 &state->im->mca_addr,
2831 &psf->sf_addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002832 psf->sf_count[MCAST_INCLUDE],
2833 psf->sf_count[MCAST_EXCLUDE]);
2834 }
2835 return 0;
2836}
2837
Philippe De Muyter56b3d972007-07-10 23:07:31 -07002838static const struct seq_operations igmp6_mcf_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002839 .start = igmp6_mcf_seq_start,
2840 .next = igmp6_mcf_seq_next,
2841 .stop = igmp6_mcf_seq_stop,
2842 .show = igmp6_mcf_seq_show,
2843};
2844
2845static int igmp6_mcf_seq_open(struct inode *inode, struct file *file)
2846{
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002847 return seq_open_net(inode, file, &igmp6_mcf_seq_ops,
2848 sizeof(struct igmp6_mcf_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002849}
2850
Arjan van de Ven9a321442007-02-12 00:55:35 -08002851static const struct file_operations igmp6_mcf_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002852 .owner = THIS_MODULE,
2853 .open = igmp6_mcf_seq_open,
2854 .read = seq_read,
2855 .llseek = seq_lseek,
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002856 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002857};
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002858
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002859static int __net_init igmp6_proc_init(struct net *net)
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002860{
2861 int err;
2862
2863 err = -ENOMEM;
Gao fengd4beaa62013-02-18 01:34:54 +00002864 if (!proc_create("igmp6", S_IRUGO, net->proc_net, &igmp6_mc_seq_fops))
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002865 goto out;
Gao fengd4beaa62013-02-18 01:34:54 +00002866 if (!proc_create("mcfilter6", S_IRUGO, net->proc_net,
2867 &igmp6_mcf_seq_fops))
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002868 goto out_proc_net_igmp6;
2869
2870 err = 0;
2871out:
2872 return err;
2873
2874out_proc_net_igmp6:
Gao fengece31ff2013-02-18 01:34:56 +00002875 remove_proc_entry("igmp6", net->proc_net);
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002876 goto out;
2877}
2878
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002879static void __net_exit igmp6_proc_exit(struct net *net)
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002880{
Gao fengece31ff2013-02-18 01:34:56 +00002881 remove_proc_entry("mcfilter6", net->proc_net);
2882 remove_proc_entry("igmp6", net->proc_net);
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002883}
2884#else
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002885static inline int igmp6_proc_init(struct net *net)
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002886{
2887 return 0;
2888}
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002889static inline void igmp6_proc_exit(struct net *net)
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002890{
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002891}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002892#endif
2893
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002894static int __net_init igmp6_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002895{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002896 int err;
2897
Denis V. Lunev1ed85162008-04-03 14:31:03 -07002898 err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6,
2899 SOCK_RAW, IPPROTO_ICMPV6, net);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002900 if (err < 0) {
Joe Perchesf3213832012-05-15 14:11:53 +00002901 pr_err("Failed to initialize the IGMP6 control socket (err %d)\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002902 err);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002903 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002904 }
2905
Denis V. Lunev1ed85162008-04-03 14:31:03 -07002906 inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002907
Madhu Challa93a714d2015-02-25 09:58:35 -08002908 err = inet_ctl_sock_create(&net->ipv6.mc_autojoin_sk, PF_INET6,
2909 SOCK_RAW, IPPROTO_ICMPV6, net);
2910 if (err < 0) {
2911 pr_err("Failed to initialize the IGMP6 autojoin socket (err %d)\n",
2912 err);
2913 goto out_sock_create;
2914 }
2915
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002916 err = igmp6_proc_init(net);
2917 if (err)
Madhu Challa93a714d2015-02-25 09:58:35 -08002918 goto out_sock_create_autojoin;
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002919
Madhu Challa93a714d2015-02-25 09:58:35 -08002920 return 0;
2921
2922out_sock_create_autojoin:
2923 inet_ctl_sock_destroy(net->ipv6.mc_autojoin_sk);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002924out_sock_create:
Denis V. Lunev1ed85162008-04-03 14:31:03 -07002925 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
Madhu Challa93a714d2015-02-25 09:58:35 -08002926out:
2927 return err;
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002928}
2929
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00002930static void __net_exit igmp6_net_exit(struct net *net)
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002931{
Denis V. Lunev1ed85162008-04-03 14:31:03 -07002932 inet_ctl_sock_destroy(net->ipv6.igmp_sk);
Madhu Challa93a714d2015-02-25 09:58:35 -08002933 inet_ctl_sock_destroy(net->ipv6.mc_autojoin_sk);
Daniel Lezcanoea82edf2008-03-21 04:10:53 -07002934 igmp6_proc_exit(net);
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002935}
2936
2937static struct pernet_operations igmp6_net_ops = {
2938 .init = igmp6_net_init,
2939 .exit = igmp6_net_exit,
2940};
2941
2942int __init igmp6_init(void)
2943{
2944 return register_pernet_subsys(&igmp6_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002945}
2946
2947void igmp6_cleanup(void)
2948{
Daniel Lezcanob8ad0cb2008-03-07 11:16:55 -08002949 unregister_pernet_subsys(&igmp6_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002950}