Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Multicast support for IPv6 | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 | 7 | * |
1ab1457c | 8 | * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c |
1da177e4 LT |
9 | * |
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 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/errno.h> | |
31 | #include <linux/types.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/socket.h> | |
34 | #include <linux/sockios.h> | |
35 | #include <linux/jiffies.h> | |
36 | #include <linux/times.h> | |
37 | #include <linux/net.h> | |
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> | |
5a0e3ad6 | 46 | #include <linux/slab.h> |
9d4a0314 | 47 | #include <linux/pkt_sched.h> |
6e7cb837 | 48 | #include <net/mld.h> |
1da177e4 LT |
49 | |
50 | #include <linux/netfilter.h> | |
51 | #include <linux/netfilter_ipv6.h> | |
52 | ||
457c4cbc | 53 | #include <net/net_namespace.h> |
1da177e4 LT |
54 | #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> | |
1ed8516f | 63 | #include <net/inet_common.h> |
1da177e4 LT |
64 | |
65 | #include <net/ip6_checksum.h> | |
66 | ||
6e7cb837 YH |
67 | /* Ensure that we have struct in6_addr aligned on 32bit word. */ |
68 | static 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) | |
1da177e4 LT |
72 | }; |
73 | ||
74 | static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT; | |
75 | ||
1da177e4 LT |
76 | static void igmp6_join_group(struct ifmcaddr6 *ma); |
77 | static void igmp6_leave_group(struct ifmcaddr6 *ma); | |
78 | static void igmp6_timer_handler(unsigned long data); | |
79 | ||
80 | static void mld_gq_timer_expire(unsigned long data); | |
81 | static void mld_ifc_timer_expire(unsigned long data); | |
82 | static void mld_ifc_event(struct inet6_dev *idev); | |
83 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc); | |
b71d1d42 | 84 | static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *addr); |
1da177e4 | 85 | static void mld_clear_delrec(struct inet6_dev *idev); |
6c567b78 | 86 | static bool mld_in_v1_mode(const struct inet6_dev *idev); |
1da177e4 LT |
87 | static int sf_setstate(struct ifmcaddr6 *pmc); |
88 | static void sf_markstate(struct ifmcaddr6 *pmc); | |
89 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc); | |
b71d1d42 ED |
90 | static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
91 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 | 92 | int delta); |
b71d1d42 ED |
93 | static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
94 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
95 | int delta); |
96 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
97 | struct inet6_dev *idev); | |
98 | ||
1da177e4 | 99 | #define MLD_QRV_DEFAULT 2 |
89225d1c DB |
100 | /* 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) | |
1da177e4 | 104 | |
9fd07841 DB |
105 | /* RFC3810, 8.1 Query Version Distinctions */ |
106 | #define MLD_V1_QUERY_LEN 24 | |
107 | #define MLD_V2_QUERY_LEN_MIN 28 | |
108 | ||
6f4353d8 | 109 | #define IPV6_MLD_MAX_MSF 64 |
1da177e4 | 110 | |
ab32ea5d | 111 | int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF; |
2f711939 | 112 | int sysctl_mld_qrv __read_mostly = MLD_QRV_DEFAULT; |
1da177e4 LT |
113 | |
114 | /* | |
115 | * socket join on multicast group | |
116 | */ | |
117 | ||
456b61bc ED |
118 | #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 | ||
fc4eba58 HFS |
123 | static int unsolicited_report_interval(struct inet6_dev *idev) |
124 | { | |
125 | int iv; | |
126 | ||
6c567b78 | 127 | if (mld_in_v1_mode(idev)) |
fc4eba58 HFS |
128 | 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 | ||
46a4dee0 | 135 | int __ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) |
1da177e4 LT |
136 | { |
137 | struct net_device *dev = NULL; | |
138 | struct ipv6_mc_socklist *mc_lst; | |
139 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 140 | struct net *net = sock_net(sk); |
1da177e4 LT |
141 | int err; |
142 | ||
46a4dee0 MC |
143 | ASSERT_RTNL(); |
144 | ||
1da177e4 LT |
145 | if (!ipv6_addr_is_multicast(addr)) |
146 | return -EINVAL; | |
147 | ||
456b61bc ED |
148 | rcu_read_lock(); |
149 | for_each_pmc_rcu(np, mc_lst) { | |
c9e3e8b6 DS |
150 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
151 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
456b61bc | 152 | rcu_read_unlock(); |
c9e3e8b6 DS |
153 | return -EADDRINUSE; |
154 | } | |
155 | } | |
456b61bc | 156 | rcu_read_unlock(); |
c9e3e8b6 | 157 | |
1da177e4 LT |
158 | mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL); |
159 | ||
160 | if (mc_lst == NULL) | |
161 | return -ENOMEM; | |
162 | ||
163 | mc_lst->next = NULL; | |
4e3fd7a0 | 164 | mc_lst->addr = *addr; |
1da177e4 LT |
165 | |
166 | if (ifindex == 0) { | |
167 | struct rt6_info *rt; | |
b8ad0cbc | 168 | rt = rt6_lookup(net, addr, NULL, 0, 0); |
1da177e4 | 169 | if (rt) { |
d1918542 | 170 | dev = rt->dst.dev; |
94e187c0 | 171 | ip6_rt_put(rt); |
1da177e4 LT |
172 | } |
173 | } else | |
414b6c94 | 174 | dev = __dev_get_by_index(net, ifindex); |
1da177e4 LT |
175 | |
176 | if (dev == NULL) { | |
177 | 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; | |
196433c5 | 183 | rwlock_init(&mc_lst->sflock); |
1da177e4 LT |
184 | 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)); | |
1da177e4 LT |
194 | return err; |
195 | } | |
196 | ||
1da177e4 | 197 | mc_lst->next = np->ipv6_mc_list; |
456b61bc | 198 | rcu_assign_pointer(np->ipv6_mc_list, mc_lst); |
1da177e4 | 199 | |
46a4dee0 MC |
200 | return 0; |
201 | } | |
202 | EXPORT_SYMBOL(__ipv6_sock_mc_join); | |
203 | ||
204 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) | |
205 | { | |
206 | int ret; | |
207 | ||
208 | rtnl_lock(); | |
209 | ret = __ipv6_sock_mc_join(sk, ifindex, addr); | |
a9ed4a29 | 210 | rtnl_unlock(); |
1da177e4 | 211 | |
46a4dee0 | 212 | return ret; |
1da177e4 | 213 | } |
46a4dee0 | 214 | EXPORT_SYMBOL(ipv6_sock_mc_join); |
1da177e4 LT |
215 | |
216 | /* | |
217 | * socket leave on multicast group | |
218 | */ | |
46a4dee0 | 219 | int __ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) |
1da177e4 LT |
220 | { |
221 | struct ipv6_pinfo *np = inet6_sk(sk); | |
456b61bc ED |
222 | struct ipv6_mc_socklist *mc_lst; |
223 | struct ipv6_mc_socklist __rcu **lnk; | |
3b1e0a65 | 224 | struct net *net = sock_net(sk); |
1da177e4 | 225 | |
46a4dee0 MC |
226 | ASSERT_RTNL(); |
227 | ||
a858d64b LW |
228 | if (!ipv6_addr_is_multicast(addr)) |
229 | return -EINVAL; | |
230 | ||
456b61bc | 231 | for (lnk = &np->ipv6_mc_list; |
b5350916 | 232 | (mc_lst = rtnl_dereference(*lnk)) != NULL; |
456b61bc | 233 | lnk = &mc_lst->next) { |
1da177e4 LT |
234 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
235 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
236 | struct net_device *dev; | |
237 | ||
238 | *lnk = mc_lst->next; | |
1da177e4 | 239 | |
414b6c94 | 240 | dev = __dev_get_by_index(net, mc_lst->ifindex); |
b8ad0cbc | 241 | if (dev != NULL) { |
96b52e61 | 242 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 243 | |
acd6e00b | 244 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 245 | if (idev) |
1da177e4 | 246 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
247 | } else |
248 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
a9ed4a29 | 249 | |
456b61bc | 250 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 251 | kfree_rcu(mc_lst, rcu); |
1da177e4 LT |
252 | return 0; |
253 | } | |
254 | } | |
1da177e4 | 255 | |
9951f036 | 256 | return -EADDRNOTAVAIL; |
1da177e4 | 257 | } |
46a4dee0 MC |
258 | EXPORT_SYMBOL(__ipv6_sock_mc_drop); |
259 | ||
260 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) | |
261 | { | |
262 | int ret; | |
263 | ||
264 | rtnl_lock(); | |
265 | ret = __ipv6_sock_mc_drop(sk, ifindex, addr); | |
266 | rtnl_unlock(); | |
267 | ||
268 | return ret; | |
269 | } | |
270 | EXPORT_SYMBOL(ipv6_sock_mc_drop); | |
1da177e4 | 271 | |
96b52e61 ED |
272 | /* called with rcu_read_lock() */ |
273 | static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net, | |
b71d1d42 | 274 | const struct in6_addr *group, |
96b52e61 | 275 | int ifindex) |
1da177e4 LT |
276 | { |
277 | struct net_device *dev = NULL; | |
278 | struct inet6_dev *idev = NULL; | |
279 | ||
280 | if (ifindex == 0) { | |
96b52e61 | 281 | struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0); |
1da177e4 | 282 | |
1da177e4 | 283 | if (rt) { |
d1918542 | 284 | dev = rt->dst.dev; |
94e187c0 | 285 | ip6_rt_put(rt); |
1da177e4 LT |
286 | } |
287 | } else | |
96b52e61 | 288 | dev = dev_get_by_index_rcu(net, ifindex); |
1da177e4 LT |
289 | |
290 | if (!dev) | |
96b52e61 ED |
291 | return NULL; |
292 | idev = __in6_dev_get(dev); | |
448eb71f | 293 | if (!idev) |
8a22c99a | 294 | return NULL; |
1da177e4 | 295 | read_lock_bh(&idev->lock); |
96b52e61 ED |
296 | if (idev->dead) { |
297 | read_unlock_bh(&idev->lock); | |
298 | return NULL; | |
299 | } | |
1da177e4 LT |
300 | return idev; |
301 | } | |
302 | ||
303 | void ipv6_sock_mc_close(struct sock *sk) | |
304 | { | |
305 | struct ipv6_pinfo *np = inet6_sk(sk); | |
306 | struct ipv6_mc_socklist *mc_lst; | |
3b1e0a65 | 307 | struct net *net = sock_net(sk); |
1da177e4 | 308 | |
0e1efe9d ED |
309 | if (!rcu_access_pointer(np->ipv6_mc_list)) |
310 | return; | |
311 | ||
a9ed4a29 | 312 | rtnl_lock(); |
b5350916 | 313 | while ((mc_lst = rtnl_dereference(np->ipv6_mc_list)) != NULL) { |
1da177e4 LT |
314 | struct net_device *dev; |
315 | ||
316 | np->ipv6_mc_list = mc_lst->next; | |
1da177e4 | 317 | |
414b6c94 | 318 | dev = __dev_get_by_index(net, mc_lst->ifindex); |
1da177e4 | 319 | if (dev) { |
96b52e61 | 320 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 321 | |
acd6e00b | 322 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 323 | if (idev) |
1da177e4 | 324 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
325 | } else |
326 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
1da177e4 | 327 | |
456b61bc | 328 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 329 | kfree_rcu(mc_lst, rcu); |
456b61bc | 330 | |
1da177e4 | 331 | } |
a9ed4a29 | 332 | rtnl_unlock(); |
1da177e4 LT |
333 | } |
334 | ||
335 | int ip6_mc_source(int add, int omode, struct sock *sk, | |
336 | struct group_source_req *pgsr) | |
337 | { | |
338 | struct in6_addr *source, *group; | |
339 | struct ipv6_mc_socklist *pmc; | |
1da177e4 LT |
340 | struct inet6_dev *idev; |
341 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
342 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 343 | struct net *net = sock_net(sk); |
1da177e4 | 344 | int i, j, rv; |
c9e3e8b6 | 345 | int leavegroup = 0; |
5ab4a6c8 | 346 | int pmclocked = 0; |
1da177e4 LT |
347 | int err; |
348 | ||
1da177e4 LT |
349 | source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr; |
350 | group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr; | |
351 | ||
352 | if (!ipv6_addr_is_multicast(group)) | |
353 | return -EINVAL; | |
354 | ||
96b52e61 ED |
355 | rcu_read_lock(); |
356 | idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface); | |
357 | if (!idev) { | |
358 | rcu_read_unlock(); | |
1da177e4 | 359 | return -ENODEV; |
96b52e61 | 360 | } |
1da177e4 LT |
361 | |
362 | err = -EADDRNOTAVAIL; | |
363 | ||
456b61bc | 364 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
365 | if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface) |
366 | continue; | |
367 | if (ipv6_addr_equal(&pmc->addr, group)) | |
368 | break; | |
369 | } | |
917f2f10 DS |
370 | if (!pmc) { /* must have a prior join */ |
371 | err = -EINVAL; | |
1da177e4 | 372 | goto done; |
917f2f10 | 373 | } |
1da177e4 LT |
374 | /* if a source filter was set, must be the same mode as before */ |
375 | if (pmc->sflist) { | |
917f2f10 DS |
376 | if (pmc->sfmode != omode) { |
377 | err = -EINVAL; | |
1da177e4 | 378 | goto done; |
917f2f10 | 379 | } |
1da177e4 LT |
380 | } else if (pmc->sfmode != omode) { |
381 | /* allow mode switches for empty-set filters */ | |
382 | ip6_mc_add_src(idev, group, omode, 0, NULL, 0); | |
383 | ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
384 | pmc->sfmode = omode; | |
385 | } | |
386 | ||
96b52e61 | 387 | write_lock(&pmc->sflock); |
5ab4a6c8 DS |
388 | pmclocked = 1; |
389 | ||
1da177e4 LT |
390 | psl = pmc->sflist; |
391 | if (!add) { | |
392 | if (!psl) | |
917f2f10 | 393 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 394 | rv = !0; |
67ba4152 | 395 | for (i = 0; i < psl->sl_count; i++) { |
07c2fecc | 396 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
1da177e4 LT |
397 | if (rv == 0) |
398 | break; | |
399 | } | |
400 | if (rv) /* source not found */ | |
917f2f10 | 401 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 402 | |
c9e3e8b6 DS |
403 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
404 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { | |
405 | leavegroup = 1; | |
406 | goto done; | |
407 | } | |
408 | ||
1da177e4 LT |
409 | /* update the interface filter */ |
410 | ip6_mc_del_src(idev, group, omode, 1, source, 1); | |
411 | ||
67ba4152 | 412 | for (j = i+1; j < psl->sl_count; j++) |
1da177e4 LT |
413 | psl->sl_addr[j-1] = psl->sl_addr[j]; |
414 | psl->sl_count--; | |
415 | err = 0; | |
416 | goto done; | |
417 | } | |
418 | /* else, add a new source to the filter */ | |
419 | ||
420 | if (psl && psl->sl_count >= sysctl_mld_max_msf) { | |
421 | err = -ENOBUFS; | |
422 | goto done; | |
423 | } | |
424 | if (!psl || psl->sl_count == psl->sl_max) { | |
425 | struct ip6_sf_socklist *newpsl; | |
426 | int count = IP6_SFBLOCK; | |
427 | ||
428 | if (psl) | |
429 | count += psl->sl_max; | |
8b3a7005 | 430 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC); |
1da177e4 LT |
431 | if (!newpsl) { |
432 | err = -ENOBUFS; | |
433 | goto done; | |
434 | } | |
435 | newpsl->sl_max = count; | |
436 | newpsl->sl_count = count - IP6_SFBLOCK; | |
437 | if (psl) { | |
67ba4152 | 438 | for (i = 0; i < psl->sl_count; i++) |
1da177e4 LT |
439 | newpsl->sl_addr[i] = psl->sl_addr[i]; |
440 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
441 | } | |
442 | pmc->sflist = psl = newpsl; | |
443 | } | |
444 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ | |
67ba4152 | 445 | for (i = 0; i < psl->sl_count; i++) { |
07c2fecc | 446 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
56db1c5f JS |
447 | if (rv == 0) /* There is an error in the address. */ |
448 | goto done; | |
1da177e4 | 449 | } |
67ba4152 | 450 | for (j = psl->sl_count-1; j >= i; j--) |
1da177e4 LT |
451 | psl->sl_addr[j+1] = psl->sl_addr[j]; |
452 | psl->sl_addr[i] = *source; | |
453 | psl->sl_count++; | |
454 | err = 0; | |
455 | /* update the interface list */ | |
456 | ip6_mc_add_src(idev, group, omode, 1, source, 1); | |
457 | done: | |
5ab4a6c8 | 458 | if (pmclocked) |
96b52e61 | 459 | write_unlock(&pmc->sflock); |
1da177e4 | 460 | read_unlock_bh(&idev->lock); |
96b52e61 | 461 | rcu_read_unlock(); |
c9e3e8b6 DS |
462 | if (leavegroup) |
463 | return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group); | |
1da177e4 LT |
464 | return err; |
465 | } | |
466 | ||
467 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) | |
468 | { | |
b71d1d42 | 469 | const struct in6_addr *group; |
1da177e4 | 470 | struct ipv6_mc_socklist *pmc; |
1da177e4 LT |
471 | struct inet6_dev *idev; |
472 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
473 | struct ip6_sf_socklist *newpsl, *psl; | |
3b1e0a65 | 474 | struct net *net = sock_net(sk); |
9951f036 | 475 | int leavegroup = 0; |
1da177e4 LT |
476 | int i, err; |
477 | ||
478 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
479 | ||
480 | if (!ipv6_addr_is_multicast(group)) | |
481 | return -EINVAL; | |
482 | if (gsf->gf_fmode != MCAST_INCLUDE && | |
483 | gsf->gf_fmode != MCAST_EXCLUDE) | |
484 | return -EINVAL; | |
485 | ||
96b52e61 ED |
486 | rcu_read_lock(); |
487 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 488 | |
96b52e61 ED |
489 | if (!idev) { |
490 | rcu_read_unlock(); | |
1da177e4 | 491 | return -ENODEV; |
96b52e61 | 492 | } |
1da177e4 | 493 | |
9c05989b | 494 | err = 0; |
5ab4a6c8 | 495 | |
9951f036 DS |
496 | if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) { |
497 | leavegroup = 1; | |
498 | goto done; | |
499 | } | |
500 | ||
456b61bc | 501 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
502 | if (pmc->ifindex != gsf->gf_interface) |
503 | continue; | |
504 | if (ipv6_addr_equal(&pmc->addr, group)) | |
505 | break; | |
506 | } | |
917f2f10 DS |
507 | if (!pmc) { /* must have a prior join */ |
508 | err = -EINVAL; | |
1da177e4 | 509 | goto done; |
917f2f10 | 510 | } |
1da177e4 | 511 | if (gsf->gf_numsrc) { |
8b3a7005 KK |
512 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc), |
513 | GFP_ATOMIC); | |
1da177e4 LT |
514 | if (!newpsl) { |
515 | err = -ENOBUFS; | |
516 | goto done; | |
517 | } | |
518 | newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc; | |
67ba4152 | 519 | for (i = 0; i < newpsl->sl_count; ++i) { |
1da177e4 LT |
520 | struct sockaddr_in6 *psin6; |
521 | ||
522 | psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i]; | |
523 | newpsl->sl_addr[i] = psin6->sin6_addr; | |
524 | } | |
525 | err = ip6_mc_add_src(idev, group, gsf->gf_fmode, | |
526 | newpsl->sl_count, newpsl->sl_addr, 0); | |
527 | if (err) { | |
528 | sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); | |
529 | goto done; | |
530 | } | |
8713dbf0 | 531 | } else { |
1da177e4 | 532 | newpsl = NULL; |
8713dbf0 YZ |
533 | (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); |
534 | } | |
5ab4a6c8 | 535 | |
96b52e61 | 536 | write_lock(&pmc->sflock); |
1da177e4 LT |
537 | psl = pmc->sflist; |
538 | if (psl) { | |
539 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, | |
540 | psl->sl_count, psl->sl_addr, 0); | |
541 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
542 | } else | |
543 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
544 | pmc->sflist = newpsl; | |
545 | pmc->sfmode = gsf->gf_fmode; | |
96b52e61 | 546 | write_unlock(&pmc->sflock); |
917f2f10 | 547 | err = 0; |
1da177e4 LT |
548 | done: |
549 | read_unlock_bh(&idev->lock); | |
96b52e61 | 550 | rcu_read_unlock(); |
9951f036 DS |
551 | if (leavegroup) |
552 | err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group); | |
1da177e4 LT |
553 | return err; |
554 | } | |
555 | ||
556 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
557 | struct group_filter __user *optval, int __user *optlen) | |
558 | { | |
559 | int err, i, count, copycount; | |
b71d1d42 | 560 | const struct in6_addr *group; |
1da177e4 LT |
561 | struct ipv6_mc_socklist *pmc; |
562 | struct inet6_dev *idev; | |
1da177e4 LT |
563 | struct ipv6_pinfo *inet6 = inet6_sk(sk); |
564 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 565 | struct net *net = sock_net(sk); |
1da177e4 LT |
566 | |
567 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
568 | ||
569 | if (!ipv6_addr_is_multicast(group)) | |
570 | return -EINVAL; | |
571 | ||
96b52e61 ED |
572 | rcu_read_lock(); |
573 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 574 | |
96b52e61 ED |
575 | if (!idev) { |
576 | rcu_read_unlock(); | |
1da177e4 | 577 | return -ENODEV; |
96b52e61 | 578 | } |
1da177e4 LT |
579 | |
580 | err = -EADDRNOTAVAIL; | |
f7ed925c WC |
581 | /* changes to the ipv6_mc_list require the socket lock and |
582 | * rtnl lock. We have the socket lock and rcu read lock, | |
5ab4a6c8 DS |
583 | * so reading the list is safe. |
584 | */ | |
1da177e4 | 585 | |
456b61bc | 586 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
587 | if (pmc->ifindex != gsf->gf_interface) |
588 | continue; | |
589 | if (ipv6_addr_equal(group, &pmc->addr)) | |
590 | break; | |
591 | } | |
592 | if (!pmc) /* must have a prior join */ | |
593 | goto done; | |
594 | gsf->gf_fmode = pmc->sfmode; | |
595 | psl = pmc->sflist; | |
596 | count = psl ? psl->sl_count : 0; | |
597 | read_unlock_bh(&idev->lock); | |
96b52e61 | 598 | rcu_read_unlock(); |
1da177e4 LT |
599 | |
600 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; | |
601 | gsf->gf_numsrc = count; | |
602 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || | |
603 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { | |
604 | return -EFAULT; | |
605 | } | |
f7ed925c WC |
606 | /* changes to psl require the socket lock, and a write lock |
607 | * on pmc->sflock. We have the socket lock so reading here is safe. | |
5ab4a6c8 | 608 | */ |
67ba4152 | 609 | for (i = 0; i < copycount; i++) { |
1da177e4 LT |
610 | struct sockaddr_in6 *psin6; |
611 | struct sockaddr_storage ss; | |
612 | ||
613 | psin6 = (struct sockaddr_in6 *)&ss; | |
614 | memset(&ss, 0, sizeof(ss)); | |
615 | psin6->sin6_family = AF_INET6; | |
616 | psin6->sin6_addr = psl->sl_addr[i]; | |
1ab1457c | 617 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) |
1da177e4 LT |
618 | return -EFAULT; |
619 | } | |
620 | return 0; | |
621 | done: | |
622 | read_unlock_bh(&idev->lock); | |
96b52e61 | 623 | rcu_read_unlock(); |
1da177e4 LT |
624 | return err; |
625 | } | |
626 | ||
a50feda5 ED |
627 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, |
628 | const struct in6_addr *src_addr) | |
1da177e4 LT |
629 | { |
630 | struct ipv6_pinfo *np = inet6_sk(sk); | |
631 | struct ipv6_mc_socklist *mc; | |
632 | struct ip6_sf_socklist *psl; | |
a50feda5 | 633 | bool rv = true; |
1da177e4 | 634 | |
456b61bc ED |
635 | rcu_read_lock(); |
636 | for_each_pmc_rcu(np, mc) { | |
1da177e4 LT |
637 | if (ipv6_addr_equal(&mc->addr, mc_addr)) |
638 | break; | |
639 | } | |
640 | if (!mc) { | |
456b61bc | 641 | rcu_read_unlock(); |
a50feda5 | 642 | return true; |
1da177e4 | 643 | } |
5ab4a6c8 | 644 | read_lock(&mc->sflock); |
1da177e4 LT |
645 | psl = mc->sflist; |
646 | if (!psl) { | |
647 | rv = mc->sfmode == MCAST_EXCLUDE; | |
648 | } else { | |
649 | int i; | |
650 | ||
67ba4152 | 651 | for (i = 0; i < psl->sl_count; i++) { |
1da177e4 LT |
652 | if (ipv6_addr_equal(&psl->sl_addr[i], src_addr)) |
653 | break; | |
654 | } | |
655 | if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) | |
a50feda5 | 656 | rv = false; |
1da177e4 | 657 | if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) |
a50feda5 | 658 | rv = false; |
1da177e4 | 659 | } |
5ab4a6c8 | 660 | read_unlock(&mc->sflock); |
456b61bc | 661 | rcu_read_unlock(); |
1da177e4 LT |
662 | |
663 | return rv; | |
664 | } | |
665 | ||
1da177e4 LT |
666 | static void igmp6_group_added(struct ifmcaddr6 *mc) |
667 | { | |
668 | struct net_device *dev = mc->idev->dev; | |
669 | char buf[MAX_ADDR_LEN]; | |
670 | ||
ec16ef22 YH |
671 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
672 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
673 | return; | |
674 | ||
1da177e4 LT |
675 | spin_lock_bh(&mc->mca_lock); |
676 | if (!(mc->mca_flags&MAF_LOADED)) { | |
677 | mc->mca_flags |= MAF_LOADED; | |
678 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 679 | dev_mc_add(dev, buf); |
1da177e4 LT |
680 | } |
681 | spin_unlock_bh(&mc->mca_lock); | |
682 | ||
683 | if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT)) | |
684 | return; | |
685 | ||
6c567b78 | 686 | if (mld_in_v1_mode(mc->idev)) { |
1da177e4 LT |
687 | igmp6_join_group(mc); |
688 | return; | |
689 | } | |
690 | /* else v2 */ | |
691 | ||
692 | mc->mca_crcount = mc->idev->mc_qrv; | |
693 | mld_ifc_event(mc->idev); | |
694 | } | |
695 | ||
696 | static void igmp6_group_dropped(struct ifmcaddr6 *mc) | |
697 | { | |
698 | struct net_device *dev = mc->idev->dev; | |
699 | char buf[MAX_ADDR_LEN]; | |
700 | ||
ec16ef22 YH |
701 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
702 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
703 | return; | |
704 | ||
1da177e4 LT |
705 | spin_lock_bh(&mc->mca_lock); |
706 | if (mc->mca_flags&MAF_LOADED) { | |
707 | mc->mca_flags &= ~MAF_LOADED; | |
708 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 709 | dev_mc_del(dev, buf); |
1da177e4 LT |
710 | } |
711 | ||
712 | if (mc->mca_flags & MAF_NOREPORT) | |
713 | goto done; | |
714 | spin_unlock_bh(&mc->mca_lock); | |
715 | ||
716 | if (!mc->idev->dead) | |
717 | igmp6_leave_group(mc); | |
718 | ||
719 | spin_lock_bh(&mc->mca_lock); | |
720 | if (del_timer(&mc->mca_timer)) | |
721 | atomic_dec(&mc->mca_refcnt); | |
722 | done: | |
723 | ip6_mc_clear_src(mc); | |
724 | spin_unlock_bh(&mc->mca_lock); | |
725 | } | |
726 | ||
727 | /* | |
728 | * deleted ifmcaddr6 manipulation | |
729 | */ | |
730 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) | |
731 | { | |
732 | struct ifmcaddr6 *pmc; | |
733 | ||
734 | /* this is an "ifmcaddr6" for convenience; only the fields below | |
735 | * are actually used. In particular, the refcnt and users are not | |
736 | * used for management of the delete list. Using the same structure | |
737 | * for deleted items allows change reports to use common code with | |
738 | * non-deleted or query-response MCA's. | |
739 | */ | |
0c600eda | 740 | pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC); |
1da177e4 LT |
741 | if (!pmc) |
742 | return; | |
0c600eda | 743 | |
1da177e4 LT |
744 | spin_lock_bh(&im->mca_lock); |
745 | spin_lock_init(&pmc->mca_lock); | |
746 | pmc->idev = im->idev; | |
747 | in6_dev_hold(idev); | |
748 | pmc->mca_addr = im->mca_addr; | |
749 | pmc->mca_crcount = idev->mc_qrv; | |
750 | pmc->mca_sfmode = im->mca_sfmode; | |
751 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
752 | struct ip6_sf_list *psf; | |
753 | ||
754 | pmc->mca_tomb = im->mca_tomb; | |
755 | pmc->mca_sources = im->mca_sources; | |
756 | im->mca_tomb = im->mca_sources = NULL; | |
67ba4152 | 757 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
758 | psf->sf_crcount = pmc->mca_crcount; |
759 | } | |
760 | spin_unlock_bh(&im->mca_lock); | |
761 | ||
6457d26b | 762 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
763 | pmc->next = idev->mc_tomb; |
764 | idev->mc_tomb = pmc; | |
6457d26b | 765 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
766 | } |
767 | ||
b71d1d42 | 768 | static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *pmca) |
1da177e4 LT |
769 | { |
770 | struct ifmcaddr6 *pmc, *pmc_prev; | |
771 | struct ip6_sf_list *psf, *psf_next; | |
772 | ||
6457d26b | 773 | spin_lock_bh(&idev->mc_lock); |
1da177e4 | 774 | pmc_prev = NULL; |
67ba4152 | 775 | for (pmc = idev->mc_tomb; pmc; pmc = pmc->next) { |
1da177e4 LT |
776 | if (ipv6_addr_equal(&pmc->mca_addr, pmca)) |
777 | break; | |
778 | pmc_prev = pmc; | |
779 | } | |
780 | if (pmc) { | |
781 | if (pmc_prev) | |
782 | pmc_prev->next = pmc->next; | |
783 | else | |
784 | idev->mc_tomb = pmc->next; | |
785 | } | |
6457d26b SH |
786 | spin_unlock_bh(&idev->mc_lock); |
787 | ||
1da177e4 | 788 | if (pmc) { |
67ba4152 | 789 | for (psf = pmc->mca_tomb; psf; psf = psf_next) { |
1da177e4 LT |
790 | psf_next = psf->sf_next; |
791 | kfree(psf); | |
792 | } | |
793 | in6_dev_put(pmc->idev); | |
794 | kfree(pmc); | |
795 | } | |
796 | } | |
797 | ||
798 | static void mld_clear_delrec(struct inet6_dev *idev) | |
799 | { | |
800 | struct ifmcaddr6 *pmc, *nextpmc; | |
801 | ||
6457d26b | 802 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
803 | pmc = idev->mc_tomb; |
804 | idev->mc_tomb = NULL; | |
6457d26b | 805 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
806 | |
807 | for (; pmc; pmc = nextpmc) { | |
808 | nextpmc = pmc->next; | |
809 | ip6_mc_clear_src(pmc); | |
810 | in6_dev_put(pmc->idev); | |
811 | kfree(pmc); | |
812 | } | |
813 | ||
814 | /* clear dead sources, too */ | |
815 | read_lock_bh(&idev->lock); | |
67ba4152 | 816 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
817 | struct ip6_sf_list *psf, *psf_next; |
818 | ||
819 | spin_lock_bh(&pmc->mca_lock); | |
820 | psf = pmc->mca_tomb; | |
821 | pmc->mca_tomb = NULL; | |
822 | spin_unlock_bh(&pmc->mca_lock); | |
67ba4152 | 823 | for (; psf; psf = psf_next) { |
1da177e4 LT |
824 | psf_next = psf->sf_next; |
825 | kfree(psf); | |
826 | } | |
827 | } | |
828 | read_unlock_bh(&idev->lock); | |
829 | } | |
830 | ||
1691c63e WC |
831 | static void mca_get(struct ifmcaddr6 *mc) |
832 | { | |
833 | atomic_inc(&mc->mca_refcnt); | |
834 | } | |
835 | ||
836 | static void ma_put(struct ifmcaddr6 *mc) | |
837 | { | |
838 | if (atomic_dec_and_test(&mc->mca_refcnt)) { | |
839 | in6_dev_put(mc->idev); | |
840 | kfree(mc); | |
841 | } | |
842 | } | |
843 | ||
844 | static struct ifmcaddr6 *mca_alloc(struct inet6_dev *idev, | |
845 | const struct in6_addr *addr) | |
846 | { | |
847 | struct ifmcaddr6 *mc; | |
848 | ||
849 | mc = kzalloc(sizeof(*mc), GFP_ATOMIC); | |
850 | if (mc == NULL) | |
851 | return NULL; | |
852 | ||
853 | setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc); | |
854 | ||
855 | mc->mca_addr = *addr; | |
856 | mc->idev = idev; /* reference taken by caller */ | |
857 | mc->mca_users = 1; | |
858 | /* mca_stamp should be updated upon changes */ | |
859 | mc->mca_cstamp = mc->mca_tstamp = jiffies; | |
860 | atomic_set(&mc->mca_refcnt, 1); | |
861 | spin_lock_init(&mc->mca_lock); | |
862 | ||
863 | /* initial mode is (EX, empty) */ | |
864 | mc->mca_sfmode = MCAST_EXCLUDE; | |
865 | mc->mca_sfcount[MCAST_EXCLUDE] = 1; | |
866 | ||
867 | if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) || | |
868 | IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
869 | mc->mca_flags |= MAF_NOREPORT; | |
870 | ||
871 | return mc; | |
872 | } | |
1da177e4 LT |
873 | |
874 | /* | |
875 | * device multicast group inc (add if not found) | |
876 | */ | |
9acd9f3a | 877 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
878 | { |
879 | struct ifmcaddr6 *mc; | |
880 | struct inet6_dev *idev; | |
881 | ||
a9ed4a29 SD |
882 | ASSERT_RTNL(); |
883 | ||
96b52e61 | 884 | /* we need to take a reference on idev */ |
1da177e4 LT |
885 | idev = in6_dev_get(dev); |
886 | ||
887 | if (idev == NULL) | |
888 | return -EINVAL; | |
889 | ||
890 | write_lock_bh(&idev->lock); | |
891 | if (idev->dead) { | |
892 | write_unlock_bh(&idev->lock); | |
893 | in6_dev_put(idev); | |
894 | return -ENODEV; | |
895 | } | |
896 | ||
897 | for (mc = idev->mc_list; mc; mc = mc->next) { | |
898 | if (ipv6_addr_equal(&mc->mca_addr, addr)) { | |
899 | mc->mca_users++; | |
900 | write_unlock_bh(&idev->lock); | |
901 | ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0, | |
902 | NULL, 0); | |
903 | in6_dev_put(idev); | |
904 | return 0; | |
905 | } | |
906 | } | |
907 | ||
1691c63e WC |
908 | mc = mca_alloc(idev, addr); |
909 | if (!mc) { | |
1da177e4 LT |
910 | write_unlock_bh(&idev->lock); |
911 | in6_dev_put(idev); | |
912 | return -ENOMEM; | |
913 | } | |
914 | ||
1da177e4 LT |
915 | mc->next = idev->mc_list; |
916 | idev->mc_list = mc; | |
1691c63e WC |
917 | |
918 | /* Hold this for the code below before we unlock, | |
919 | * it is already exposed via idev->mc_list. | |
920 | */ | |
921 | mca_get(mc); | |
1da177e4 LT |
922 | write_unlock_bh(&idev->lock); |
923 | ||
924 | mld_del_delrec(idev, &mc->mca_addr); | |
925 | igmp6_group_added(mc); | |
926 | ma_put(mc); | |
927 | return 0; | |
928 | } | |
929 | ||
930 | /* | |
931 | * device multicast group del | |
932 | */ | |
9acd9f3a | 933 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
934 | { |
935 | struct ifmcaddr6 *ma, **map; | |
936 | ||
a9ed4a29 SD |
937 | ASSERT_RTNL(); |
938 | ||
1da177e4 | 939 | write_lock_bh(&idev->lock); |
67ba4152 | 940 | for (map = &idev->mc_list; (ma = *map) != NULL; map = &ma->next) { |
1da177e4 LT |
941 | if (ipv6_addr_equal(&ma->mca_addr, addr)) { |
942 | if (--ma->mca_users == 0) { | |
943 | *map = ma->next; | |
944 | write_unlock_bh(&idev->lock); | |
945 | ||
946 | igmp6_group_dropped(ma); | |
947 | ||
948 | ma_put(ma); | |
949 | return 0; | |
950 | } | |
951 | write_unlock_bh(&idev->lock); | |
952 | return 0; | |
953 | } | |
954 | } | |
955 | write_unlock_bh(&idev->lock); | |
956 | ||
957 | return -ENOENT; | |
958 | } | |
959 | ||
9acd9f3a | 960 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 | 961 | { |
96b52e61 | 962 | struct inet6_dev *idev; |
1da177e4 LT |
963 | int err; |
964 | ||
414b6c94 | 965 | ASSERT_RTNL(); |
1da177e4 | 966 | |
96b52e61 ED |
967 | idev = __in6_dev_get(dev); |
968 | if (!idev) | |
969 | err = -ENODEV; | |
970 | else | |
971 | err = __ipv6_dev_mc_dec(idev, addr); | |
1da177e4 LT |
972 | |
973 | return err; | |
974 | } | |
975 | ||
1da177e4 LT |
976 | /* |
977 | * check if the interface/address pair is valid | |
978 | */ | |
a50feda5 ED |
979 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, |
980 | const struct in6_addr *src_addr) | |
1da177e4 LT |
981 | { |
982 | struct inet6_dev *idev; | |
983 | struct ifmcaddr6 *mc; | |
a50feda5 | 984 | bool rv = false; |
1da177e4 | 985 | |
96b52e61 ED |
986 | rcu_read_lock(); |
987 | idev = __in6_dev_get(dev); | |
1da177e4 LT |
988 | if (idev) { |
989 | read_lock_bh(&idev->lock); | |
67ba4152 | 990 | for (mc = idev->mc_list; mc; mc = mc->next) { |
1da177e4 LT |
991 | if (ipv6_addr_equal(&mc->mca_addr, group)) |
992 | break; | |
993 | } | |
994 | if (mc) { | |
995 | if (src_addr && !ipv6_addr_any(src_addr)) { | |
996 | struct ip6_sf_list *psf; | |
997 | ||
998 | spin_lock_bh(&mc->mca_lock); | |
67ba4152 | 999 | for (psf = mc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1000 | if (ipv6_addr_equal(&psf->sf_addr, src_addr)) |
1001 | break; | |
1002 | } | |
1003 | if (psf) | |
1004 | rv = psf->sf_count[MCAST_INCLUDE] || | |
1005 | psf->sf_count[MCAST_EXCLUDE] != | |
1006 | mc->mca_sfcount[MCAST_EXCLUDE]; | |
1007 | else | |
67ba4152 | 1008 | rv = mc->mca_sfcount[MCAST_EXCLUDE] != 0; |
1da177e4 LT |
1009 | spin_unlock_bh(&mc->mca_lock); |
1010 | } else | |
a50feda5 | 1011 | rv = true; /* don't filter unspecified source */ |
1da177e4 LT |
1012 | } |
1013 | read_unlock_bh(&idev->lock); | |
1da177e4 | 1014 | } |
96b52e61 | 1015 | rcu_read_unlock(); |
1da177e4 LT |
1016 | return rv; |
1017 | } | |
1018 | ||
1019 | static void mld_gq_start_timer(struct inet6_dev *idev) | |
1020 | { | |
63862b5b | 1021 | unsigned long tv = prandom_u32() % idev->mc_maxdelay; |
1da177e4 LT |
1022 | |
1023 | idev->mc_gq_running = 1; | |
1024 | if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2)) | |
1025 | in6_dev_hold(idev); | |
1026 | } | |
1027 | ||
b4af8def DB |
1028 | static void mld_gq_stop_timer(struct inet6_dev *idev) |
1029 | { | |
1030 | idev->mc_gq_running = 0; | |
1031 | if (del_timer(&idev->mc_gq_timer)) | |
1032 | __in6_dev_put(idev); | |
1033 | } | |
1034 | ||
c2cef4e8 | 1035 | static void mld_ifc_start_timer(struct inet6_dev *idev, unsigned long delay) |
1da177e4 | 1036 | { |
63862b5b | 1037 | unsigned long tv = prandom_u32() % delay; |
1da177e4 LT |
1038 | |
1039 | if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2)) | |
1040 | in6_dev_hold(idev); | |
1041 | } | |
1042 | ||
b4af8def DB |
1043 | static void mld_ifc_stop_timer(struct inet6_dev *idev) |
1044 | { | |
1045 | idev->mc_ifc_count = 0; | |
1046 | if (del_timer(&idev->mc_ifc_timer)) | |
1047 | __in6_dev_put(idev); | |
1048 | } | |
1049 | ||
c2cef4e8 | 1050 | static void mld_dad_start_timer(struct inet6_dev *idev, unsigned long delay) |
b173ee48 | 1051 | { |
63862b5b | 1052 | unsigned long tv = prandom_u32() % delay; |
b173ee48 HFS |
1053 | |
1054 | if (!mod_timer(&idev->mc_dad_timer, jiffies+tv+2)) | |
1055 | in6_dev_hold(idev); | |
1056 | } | |
1057 | ||
b4af8def DB |
1058 | static void mld_dad_stop_timer(struct inet6_dev *idev) |
1059 | { | |
1060 | if (del_timer(&idev->mc_dad_timer)) | |
1061 | __in6_dev_put(idev); | |
1062 | } | |
1063 | ||
1da177e4 LT |
1064 | /* |
1065 | * IGMP handling (alias multicast ICMPv6 messages) | |
1066 | */ | |
1067 | ||
1068 | static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) | |
1069 | { | |
1070 | unsigned long delay = resptime; | |
1071 | ||
1072 | /* Do not start timer for these addresses */ | |
1073 | if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) || | |
1074 | IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
1075 | return; | |
1076 | ||
1077 | if (del_timer(&ma->mca_timer)) { | |
1078 | atomic_dec(&ma->mca_refcnt); | |
1079 | delay = ma->mca_timer.expires - jiffies; | |
1080 | } | |
1081 | ||
cc7f7ab7 | 1082 | if (delay >= resptime) |
63862b5b | 1083 | delay = prandom_u32() % resptime; |
cc7f7ab7 | 1084 | |
1da177e4 LT |
1085 | ma->mca_timer.expires = jiffies + delay; |
1086 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
1087 | atomic_inc(&ma->mca_refcnt); | |
1088 | ma->mca_flags |= MAF_TIMER_RUNNING; | |
1089 | } | |
1090 | ||
5ab4a6c8 | 1091 | /* mark EXCLUDE-mode sources */ |
a50feda5 ED |
1092 | static bool mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs, |
1093 | const struct in6_addr *srcs) | |
1da177e4 LT |
1094 | { |
1095 | struct ip6_sf_list *psf; | |
1096 | int i, scount; | |
1097 | ||
1098 | scount = 0; | |
67ba4152 | 1099 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1100 | if (scount == nsrcs) |
1101 | break; | |
67ba4152 | 1102 | for (i = 0; i < nsrcs; i++) { |
5ab4a6c8 | 1103 | /* skip inactive filters */ |
e05c4ad3 | 1104 | if (psf->sf_count[MCAST_INCLUDE] || |
5ab4a6c8 DS |
1105 | pmc->mca_sfcount[MCAST_EXCLUDE] != |
1106 | psf->sf_count[MCAST_EXCLUDE]) | |
ce713ee5 | 1107 | break; |
5ab4a6c8 DS |
1108 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1109 | scount++; | |
1110 | break; | |
1111 | } | |
1112 | } | |
1113 | } | |
1114 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1115 | if (scount == nsrcs) /* all sources excluded */ | |
a50feda5 ED |
1116 | return false; |
1117 | return true; | |
5ab4a6c8 DS |
1118 | } |
1119 | ||
a50feda5 ED |
1120 | static bool mld_marksources(struct ifmcaddr6 *pmc, int nsrcs, |
1121 | const struct in6_addr *srcs) | |
5ab4a6c8 DS |
1122 | { |
1123 | struct ip6_sf_list *psf; | |
1124 | int i, scount; | |
1125 | ||
1126 | if (pmc->mca_sfmode == MCAST_EXCLUDE) | |
1127 | return mld_xmarksources(pmc, nsrcs, srcs); | |
1128 | ||
1129 | /* mark INCLUDE-mode sources */ | |
1130 | ||
1131 | scount = 0; | |
67ba4152 | 1132 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
5ab4a6c8 DS |
1133 | if (scount == nsrcs) |
1134 | break; | |
67ba4152 | 1135 | for (i = 0; i < nsrcs; i++) { |
1da177e4 LT |
1136 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1137 | psf->sf_gsresp = 1; | |
1138 | scount++; | |
1139 | break; | |
1140 | } | |
5ab4a6c8 DS |
1141 | } |
1142 | } | |
1143 | if (!scount) { | |
1144 | pmc->mca_flags &= ~MAF_GSQUERY; | |
a50feda5 | 1145 | return false; |
1da177e4 | 1146 | } |
5ab4a6c8 | 1147 | pmc->mca_flags |= MAF_GSQUERY; |
a50feda5 | 1148 | return true; |
1da177e4 LT |
1149 | } |
1150 | ||
58c0ecfd DB |
1151 | static int mld_force_mld_version(const struct inet6_dev *idev) |
1152 | { | |
1153 | /* Normally, both are 0 here. If enforcement to a particular is | |
1154 | * being used, individual device enforcement will have a lower | |
1155 | * precedence over 'all' device (.../conf/all/force_mld_version). | |
1156 | */ | |
1157 | ||
1158 | if (dev_net(idev->dev)->ipv6.devconf_all->force_mld_version != 0) | |
1159 | return dev_net(idev->dev)->ipv6.devconf_all->force_mld_version; | |
1160 | else | |
1161 | return idev->cnf.force_mld_version; | |
1162 | } | |
1163 | ||
1164 | static bool mld_in_v2_mode_only(const struct inet6_dev *idev) | |
1165 | { | |
1166 | return mld_force_mld_version(idev) == 2; | |
1167 | } | |
1168 | ||
1169 | static bool mld_in_v1_mode_only(const struct inet6_dev *idev) | |
1170 | { | |
1171 | return mld_force_mld_version(idev) == 1; | |
1172 | } | |
1173 | ||
6c567b78 DB |
1174 | static bool mld_in_v1_mode(const struct inet6_dev *idev) |
1175 | { | |
58c0ecfd DB |
1176 | if (mld_in_v2_mode_only(idev)) |
1177 | return false; | |
1178 | if (mld_in_v1_mode_only(idev)) | |
6c567b78 DB |
1179 | return true; |
1180 | if (idev->mc_v1_seen && time_before(jiffies, idev->mc_v1_seen)) | |
1181 | return true; | |
1182 | ||
1183 | return false; | |
1184 | } | |
1185 | ||
89225d1c DB |
1186 | static void mld_set_v1_mode(struct inet6_dev *idev) |
1187 | { | |
1188 | /* RFC3810, relevant sections: | |
1189 | * - 9.1. Robustness Variable | |
1190 | * - 9.2. Query Interval | |
1191 | * - 9.3. Query Response Interval | |
1192 | * - 9.12. Older Version Querier Present Timeout | |
1193 | */ | |
1194 | unsigned long switchback; | |
1195 | ||
1196 | switchback = (idev->mc_qrv * idev->mc_qi) + idev->mc_qri; | |
1197 | ||
1198 | idev->mc_v1_seen = jiffies + switchback; | |
1199 | } | |
1200 | ||
1201 | static void mld_update_qrv(struct inet6_dev *idev, | |
1202 | const struct mld2_query *mlh2) | |
1203 | { | |
1204 | /* RFC3810, relevant sections: | |
1205 | * - 5.1.8. QRV (Querier's Robustness Variable) | |
1206 | * - 9.1. Robustness Variable | |
1207 | */ | |
1208 | ||
1209 | /* The value of the Robustness Variable MUST NOT be zero, | |
1210 | * and SHOULD NOT be one. Catch this here if we ever run | |
1211 | * into such a case in future. | |
1212 | */ | |
2f711939 | 1213 | const int min_qrv = min(MLD_QRV_DEFAULT, sysctl_mld_qrv); |
89225d1c DB |
1214 | WARN_ON(idev->mc_qrv == 0); |
1215 | ||
1216 | if (mlh2->mld2q_qrv > 0) | |
1217 | idev->mc_qrv = mlh2->mld2q_qrv; | |
1218 | ||
2f711939 | 1219 | if (unlikely(idev->mc_qrv < min_qrv)) { |
89225d1c | 1220 | net_warn_ratelimited("IPv6: MLD: clamping QRV from %u to %u!\n", |
2f711939 HFS |
1221 | idev->mc_qrv, min_qrv); |
1222 | idev->mc_qrv = min_qrv; | |
89225d1c DB |
1223 | } |
1224 | } | |
1225 | ||
1226 | static void mld_update_qi(struct inet6_dev *idev, | |
1227 | const struct mld2_query *mlh2) | |
1228 | { | |
1229 | /* RFC3810, relevant sections: | |
1230 | * - 5.1.9. QQIC (Querier's Query Interval Code) | |
1231 | * - 9.2. Query Interval | |
1232 | * - 9.12. Older Version Querier Present Timeout | |
1233 | * (the [Query Interval] in the last Query received) | |
1234 | */ | |
1235 | unsigned long mc_qqi; | |
1236 | ||
1237 | if (mlh2->mld2q_qqic < 128) { | |
1238 | mc_qqi = mlh2->mld2q_qqic; | |
1239 | } else { | |
1240 | unsigned long mc_man, mc_exp; | |
1241 | ||
1242 | mc_exp = MLDV2_QQIC_EXP(mlh2->mld2q_qqic); | |
1243 | mc_man = MLDV2_QQIC_MAN(mlh2->mld2q_qqic); | |
1244 | ||
1245 | mc_qqi = (mc_man | 0x10) << (mc_exp + 3); | |
1246 | } | |
1247 | ||
1248 | idev->mc_qi = mc_qqi * HZ; | |
1249 | } | |
1250 | ||
1251 | static void mld_update_qri(struct inet6_dev *idev, | |
1252 | const struct mld2_query *mlh2) | |
1253 | { | |
1254 | /* RFC3810, relevant sections: | |
1255 | * - 5.1.3. Maximum Response Code | |
1256 | * - 9.3. Query Response Interval | |
1257 | */ | |
e3f5b170 | 1258 | idev->mc_qri = msecs_to_jiffies(mldv2_mrc(mlh2)); |
89225d1c DB |
1259 | } |
1260 | ||
2b7c121f | 1261 | static int mld_process_v1(struct inet6_dev *idev, struct mld_msg *mld, |
35f7aa53 | 1262 | unsigned long *max_delay, bool v1_query) |
2b7c121f DB |
1263 | { |
1264 | unsigned long mldv1_md; | |
1265 | ||
1266 | /* Ignore v1 queries */ | |
1267 | if (mld_in_v2_mode_only(idev)) | |
1268 | return -EINVAL; | |
1269 | ||
2b7c121f | 1270 | mldv1_md = ntohs(mld->mld_maxdelay); |
35f7aa53 DB |
1271 | |
1272 | /* When in MLDv1 fallback and a MLDv2 router start-up being | |
1273 | * unaware of current MLDv1 operation, the MRC == MRD mapping | |
1274 | * only works when the exponential algorithm is not being | |
1275 | * used (as MLDv1 is unaware of such things). | |
1276 | * | |
1277 | * According to the RFC author, the MLDv2 implementations | |
1278 | * he's aware of all use a MRC < 32768 on start up queries. | |
1279 | * | |
1280 | * Thus, should we *ever* encounter something else larger | |
1281 | * than that, just assume the maximum possible within our | |
1282 | * reach. | |
1283 | */ | |
1284 | if (!v1_query) | |
1285 | mldv1_md = min(mldv1_md, MLDV1_MRD_MAX_COMPAT); | |
1286 | ||
2b7c121f DB |
1287 | *max_delay = max(msecs_to_jiffies(mldv1_md), 1UL); |
1288 | ||
35f7aa53 DB |
1289 | /* MLDv1 router present: we need to go into v1 mode *only* |
1290 | * when an MLDv1 query is received as per section 9.12. of | |
1291 | * RFC3810! And we know from RFC2710 section 3.7 that MLDv1 | |
1292 | * queries MUST be of exactly 24 octets. | |
1293 | */ | |
1294 | if (v1_query) | |
1295 | mld_set_v1_mode(idev); | |
2b7c121f DB |
1296 | |
1297 | /* cancel MLDv2 report timer */ | |
b4af8def | 1298 | mld_gq_stop_timer(idev); |
2b7c121f | 1299 | /* cancel the interface change timer */ |
b4af8def | 1300 | mld_ifc_stop_timer(idev); |
2b7c121f DB |
1301 | /* clear deleted report items */ |
1302 | mld_clear_delrec(idev); | |
1303 | ||
1304 | return 0; | |
1305 | } | |
1306 | ||
1307 | static int mld_process_v2(struct inet6_dev *idev, struct mld2_query *mld, | |
1308 | unsigned long *max_delay) | |
1309 | { | |
2b7c121f DB |
1310 | *max_delay = max(msecs_to_jiffies(mldv2_mrc(mld)), 1UL); |
1311 | ||
1312 | mld_update_qrv(idev, mld); | |
1313 | mld_update_qi(idev, mld); | |
1314 | mld_update_qri(idev, mld); | |
1315 | ||
1316 | idev->mc_maxdelay = *max_delay; | |
1317 | ||
1318 | return 0; | |
1319 | } | |
1320 | ||
96b52e61 | 1321 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1322 | int igmp6_event_query(struct sk_buff *skb) |
1323 | { | |
97300b5f | 1324 | struct mld2_query *mlh2 = NULL; |
1da177e4 | 1325 | struct ifmcaddr6 *ma; |
b71d1d42 | 1326 | const struct in6_addr *group; |
1da177e4 LT |
1327 | unsigned long max_delay; |
1328 | struct inet6_dev *idev; | |
6e7cb837 | 1329 | struct mld_msg *mld; |
1da177e4 LT |
1330 | int group_type; |
1331 | int mark = 0; | |
2b7c121f | 1332 | int len, err; |
1da177e4 LT |
1333 | |
1334 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) | |
1335 | return -EINVAL; | |
1336 | ||
1337 | /* compute payload length excluding extension headers */ | |
0660e03f | 1338 | len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); |
cfe1fc77 | 1339 | len -= skb_network_header_len(skb); |
1da177e4 | 1340 | |
e940f5d6 HL |
1341 | /* RFC3810 6.2 |
1342 | * Upon reception of an MLD message that contains a Query, the node | |
1343 | * checks if the source address of the message is a valid link-local | |
1344 | * address, if the Hop Limit is set to 1, and if the Router Alert | |
1345 | * option is present in the Hop-By-Hop Options header of the IPv6 | |
1346 | * packet. If any of these checks fails, the packet is dropped. | |
1347 | */ | |
1348 | if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL) || | |
1349 | ipv6_hdr(skb)->hop_limit != 1 || | |
1350 | !(IP6CB(skb)->flags & IP6SKB_ROUTERALERT) || | |
1351 | IP6CB(skb)->ra != htons(IPV6_OPT_ROUTERALERT_MLD)) | |
1da177e4 LT |
1352 | return -EINVAL; |
1353 | ||
96b52e61 | 1354 | idev = __in6_dev_get(skb->dev); |
1da177e4 LT |
1355 | if (idev == NULL) |
1356 | return 0; | |
1357 | ||
6e7cb837 YH |
1358 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1359 | group = &mld->mld_mca; | |
1da177e4 LT |
1360 | group_type = ipv6_addr_type(group); |
1361 | ||
1362 | if (group_type != IPV6_ADDR_ANY && | |
96b52e61 | 1363 | !(group_type&IPV6_ADDR_MULTICAST)) |
1da177e4 | 1364 | return -EINVAL; |
1da177e4 | 1365 | |
35f7aa53 DB |
1366 | if (len < MLD_V1_QUERY_LEN) { |
1367 | return -EINVAL; | |
1368 | } else if (len == MLD_V1_QUERY_LEN || mld_in_v1_mode(idev)) { | |
1369 | err = mld_process_v1(idev, mld, &max_delay, | |
1370 | len == MLD_V1_QUERY_LEN); | |
2b7c121f DB |
1371 | if (err < 0) |
1372 | return err; | |
9fd07841 | 1373 | } else if (len >= MLD_V2_QUERY_LEN_MIN) { |
1ab1457c | 1374 | int srcs_offset = sizeof(struct mld2_query) - |
97300b5f | 1375 | sizeof(struct icmp6hdr); |
89225d1c | 1376 | |
96b52e61 | 1377 | if (!pskb_may_pull(skb, srcs_offset)) |
97300b5f | 1378 | return -EINVAL; |
96b52e61 | 1379 | |
9c70220b | 1380 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
84698963 | 1381 | |
2b7c121f DB |
1382 | err = mld_process_v2(idev, mlh2, &max_delay); |
1383 | if (err < 0) | |
1384 | return err; | |
89225d1c | 1385 | |
1da177e4 | 1386 | if (group_type == IPV6_ADDR_ANY) { /* general query */ |
96b52e61 | 1387 | if (mlh2->mld2q_nsrcs) |
1da177e4 | 1388 | return -EINVAL; /* no sources allowed */ |
96b52e61 | 1389 | |
1da177e4 | 1390 | mld_gq_start_timer(idev); |
1da177e4 LT |
1391 | return 0; |
1392 | } | |
1393 | /* mark sources to include, if group & source-specific */ | |
6e7cb837 | 1394 | if (mlh2->mld2q_nsrcs != 0) { |
1ab1457c | 1395 | if (!pskb_may_pull(skb, srcs_offset + |
96b52e61 | 1396 | ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr))) |
97300b5f | 1397 | return -EINVAL; |
96b52e61 | 1398 | |
9c70220b | 1399 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
97300b5f YZ |
1400 | mark = 1; |
1401 | } | |
35f7aa53 | 1402 | } else { |
1da177e4 | 1403 | return -EINVAL; |
35f7aa53 | 1404 | } |
1da177e4 LT |
1405 | |
1406 | read_lock_bh(&idev->lock); | |
1407 | if (group_type == IPV6_ADDR_ANY) { | |
67ba4152 | 1408 | for (ma = idev->mc_list; ma; ma = ma->next) { |
1da177e4 LT |
1409 | spin_lock_bh(&ma->mca_lock); |
1410 | igmp6_group_queried(ma, max_delay); | |
1411 | spin_unlock_bh(&ma->mca_lock); | |
1412 | } | |
1413 | } else { | |
67ba4152 | 1414 | for (ma = idev->mc_list; ma; ma = ma->next) { |
7add2a43 | 1415 | if (!ipv6_addr_equal(group, &ma->mca_addr)) |
1da177e4 LT |
1416 | continue; |
1417 | spin_lock_bh(&ma->mca_lock); | |
1418 | if (ma->mca_flags & MAF_TIMER_RUNNING) { | |
1419 | /* gsquery <- gsquery && mark */ | |
1420 | if (!mark) | |
1421 | ma->mca_flags &= ~MAF_GSQUERY; | |
1422 | } else { | |
1423 | /* gsquery <- mark */ | |
1424 | if (mark) | |
1425 | ma->mca_flags |= MAF_GSQUERY; | |
1426 | else | |
1427 | ma->mca_flags &= ~MAF_GSQUERY; | |
1428 | } | |
5ab4a6c8 | 1429 | if (!(ma->mca_flags & MAF_GSQUERY) || |
6e7cb837 | 1430 | mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs)) |
5ab4a6c8 | 1431 | igmp6_group_queried(ma, max_delay); |
1da177e4 | 1432 | spin_unlock_bh(&ma->mca_lock); |
7add2a43 | 1433 | break; |
1da177e4 LT |
1434 | } |
1435 | } | |
1436 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1437 | |
1438 | return 0; | |
1439 | } | |
1440 | ||
96b52e61 | 1441 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1442 | int igmp6_event_report(struct sk_buff *skb) |
1443 | { | |
1444 | struct ifmcaddr6 *ma; | |
1da177e4 | 1445 | struct inet6_dev *idev; |
6e7cb837 | 1446 | struct mld_msg *mld; |
1da177e4 LT |
1447 | int addr_type; |
1448 | ||
1449 | /* Our own report looped back. Ignore it. */ | |
1450 | if (skb->pkt_type == PACKET_LOOPBACK) | |
1451 | return 0; | |
1452 | ||
24c69275 DS |
1453 | /* send our report if the MC router may not have heard this report */ |
1454 | if (skb->pkt_type != PACKET_MULTICAST && | |
1455 | skb->pkt_type != PACKET_BROADCAST) | |
1456 | return 0; | |
1457 | ||
6e7cb837 | 1458 | if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr))) |
1da177e4 LT |
1459 | return -EINVAL; |
1460 | ||
6e7cb837 | 1461 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1da177e4 LT |
1462 | |
1463 | /* Drop reports with not link local source */ | |
0660e03f | 1464 | addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr); |
1ab1457c | 1465 | if (addr_type != IPV6_ADDR_ANY && |
1da177e4 LT |
1466 | !(addr_type&IPV6_ADDR_LINKLOCAL)) |
1467 | return -EINVAL; | |
1468 | ||
96b52e61 | 1469 | idev = __in6_dev_get(skb->dev); |
1da177e4 LT |
1470 | if (idev == NULL) |
1471 | return -ENODEV; | |
1472 | ||
1473 | /* | |
1474 | * Cancel the timer for this group | |
1475 | */ | |
1476 | ||
1477 | read_lock_bh(&idev->lock); | |
67ba4152 | 1478 | for (ma = idev->mc_list; ma; ma = ma->next) { |
6e7cb837 | 1479 | if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) { |
1da177e4 LT |
1480 | spin_lock(&ma->mca_lock); |
1481 | if (del_timer(&ma->mca_timer)) | |
1482 | atomic_dec(&ma->mca_refcnt); | |
1483 | ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING); | |
1484 | spin_unlock(&ma->mca_lock); | |
1485 | break; | |
1486 | } | |
1487 | } | |
1488 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1489 | return 0; |
1490 | } | |
1491 | ||
a50feda5 ED |
1492 | static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type, |
1493 | int gdeleted, int sdeleted) | |
1da177e4 LT |
1494 | { |
1495 | switch (type) { | |
1496 | case MLD2_MODE_IS_INCLUDE: | |
1497 | case MLD2_MODE_IS_EXCLUDE: | |
1498 | if (gdeleted || sdeleted) | |
a50feda5 | 1499 | return false; |
5ab4a6c8 DS |
1500 | if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) { |
1501 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
a50feda5 | 1502 | return true; |
5ab4a6c8 DS |
1503 | /* don't include if this source is excluded |
1504 | * in all filters | |
1505 | */ | |
1506 | if (psf->sf_count[MCAST_INCLUDE]) | |
7add2a43 | 1507 | return type == MLD2_MODE_IS_INCLUDE; |
5ab4a6c8 DS |
1508 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1509 | psf->sf_count[MCAST_EXCLUDE]; | |
1510 | } | |
a50feda5 | 1511 | return false; |
1da177e4 LT |
1512 | case MLD2_CHANGE_TO_INCLUDE: |
1513 | if (gdeleted || sdeleted) | |
a50feda5 | 1514 | return false; |
1da177e4 LT |
1515 | return psf->sf_count[MCAST_INCLUDE] != 0; |
1516 | case MLD2_CHANGE_TO_EXCLUDE: | |
1517 | if (gdeleted || sdeleted) | |
a50feda5 | 1518 | return false; |
1da177e4 LT |
1519 | if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 || |
1520 | psf->sf_count[MCAST_INCLUDE]) | |
a50feda5 | 1521 | return false; |
1da177e4 LT |
1522 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1523 | psf->sf_count[MCAST_EXCLUDE]; | |
1524 | case MLD2_ALLOW_NEW_SOURCES: | |
1525 | if (gdeleted || !psf->sf_crcount) | |
a50feda5 | 1526 | return false; |
1da177e4 LT |
1527 | return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted; |
1528 | case MLD2_BLOCK_OLD_SOURCES: | |
1529 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1530 | return gdeleted || (psf->sf_crcount && sdeleted); | |
1531 | return psf->sf_crcount && !gdeleted && !sdeleted; | |
1532 | } | |
a50feda5 | 1533 | return false; |
1da177e4 LT |
1534 | } |
1535 | ||
1536 | static int | |
1537 | mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted) | |
1538 | { | |
1539 | struct ip6_sf_list *psf; | |
1540 | int scount = 0; | |
1541 | ||
67ba4152 | 1542 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1543 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) |
1544 | continue; | |
1545 | scount++; | |
1546 | } | |
1547 | return scount; | |
1548 | } | |
1549 | ||
2576f17d YH |
1550 | static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb, |
1551 | struct net_device *dev, | |
1552 | const struct in6_addr *saddr, | |
1553 | const struct in6_addr *daddr, | |
1554 | int proto, int len) | |
1555 | { | |
1556 | struct ipv6hdr *hdr; | |
1557 | ||
1558 | skb->protocol = htons(ETH_P_IPV6); | |
1559 | skb->dev = dev; | |
1560 | ||
1561 | skb_reset_network_header(skb); | |
1562 | skb_put(skb, sizeof(struct ipv6hdr)); | |
1563 | hdr = ipv6_hdr(skb); | |
1564 | ||
1565 | ip6_flow_hdr(hdr, 0, 0); | |
1566 | ||
1567 | hdr->payload_len = htons(len); | |
1568 | hdr->nexthdr = proto; | |
1569 | hdr->hop_limit = inet6_sk(sk)->hop_limit; | |
1570 | ||
1571 | hdr->saddr = *saddr; | |
1572 | hdr->daddr = *daddr; | |
1573 | } | |
1574 | ||
4c672e4b | 1575 | static struct sk_buff *mld_newpack(struct inet6_dev *idev, unsigned int mtu) |
1da177e4 | 1576 | { |
8965779d | 1577 | struct net_device *dev = idev->dev; |
c346dca1 | 1578 | struct net *net = dev_net(dev); |
b8ad0cbc | 1579 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 LT |
1580 | struct sk_buff *skb; |
1581 | struct mld2_report *pmr; | |
1582 | struct in6_addr addr_buf; | |
d7aabf22 | 1583 | const struct in6_addr *saddr; |
a7ae1992 HX |
1584 | int hlen = LL_RESERVED_SPACE(dev); |
1585 | int tlen = dev->needed_tailroom; | |
4c672e4b | 1586 | unsigned int size = mtu + hlen + tlen; |
1da177e4 LT |
1587 | int err; |
1588 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1589 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1590 | IPV6_TLV_PADN, 0 }; | |
1591 | ||
1592 | /* we assume size > sizeof(ra) here */ | |
72e09ad1 ED |
1593 | /* limit our allocations to order-0 page */ |
1594 | size = min_t(int, size, SKB_MAX_ORDER(0, 0)); | |
1595 | skb = sock_alloc_send_skb(sk, size, 1, &err); | |
1da177e4 | 1596 | |
cfcabdcc | 1597 | if (!skb) |
1da177e4 LT |
1598 | return NULL; |
1599 | ||
9d4a0314 | 1600 | skb->priority = TC_PRIO_CONTROL; |
4c672e4b DB |
1601 | skb->reserved_tailroom = skb_end_offset(skb) - |
1602 | min(mtu, skb_end_offset(skb)); | |
a7ae1992 | 1603 | skb_reserve(skb, hlen); |
1da177e4 | 1604 | |
8965779d | 1605 | if (__ipv6_get_lladdr(idev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1606 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1607 | * use unspecified address as the source address |
1da177e4 LT |
1608 | * when a valid link-local address is not available. |
1609 | */ | |
d7aabf22 YH |
1610 | saddr = &in6addr_any; |
1611 | } else | |
1612 | saddr = &addr_buf; | |
1da177e4 | 1613 | |
2576f17d | 1614 | ip6_mc_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0); |
1da177e4 LT |
1615 | |
1616 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1617 | ||
27a884dc | 1618 | skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data); |
d10ba34b ACM |
1619 | skb_put(skb, sizeof(*pmr)); |
1620 | pmr = (struct mld2_report *)skb_transport_header(skb); | |
6e7cb837 YH |
1621 | pmr->mld2r_type = ICMPV6_MLD2_REPORT; |
1622 | pmr->mld2r_resv1 = 0; | |
1623 | pmr->mld2r_cksum = 0; | |
1624 | pmr->mld2r_resv2 = 0; | |
1625 | pmr->mld2r_ngrec = 0; | |
1da177e4 LT |
1626 | return skb; |
1627 | } | |
1628 | ||
1629 | static void mld_sendpack(struct sk_buff *skb) | |
1630 | { | |
0660e03f | 1631 | struct ipv6hdr *pip6 = ipv6_hdr(skb); |
9c70220b ACM |
1632 | struct mld2_report *pmr = |
1633 | (struct mld2_report *)skb_transport_header(skb); | |
1da177e4 | 1634 | int payload_len, mldlen; |
96b52e61 | 1635 | struct inet6_dev *idev; |
c346dca1 | 1636 | struct net *net = dev_net(skb->dev); |
1da177e4 | 1637 | int err; |
4c9483b2 | 1638 | struct flowi6 fl6; |
adf30907 | 1639 | struct dst_entry *dst; |
1da177e4 | 1640 | |
96b52e61 ED |
1641 | rcu_read_lock(); |
1642 | idev = __in6_dev_get(skb->dev); | |
edf391ff NH |
1643 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len); |
1644 | ||
29a3cad5 SH |
1645 | payload_len = (skb_tail_pointer(skb) - skb_network_header(skb)) - |
1646 | sizeof(*pip6); | |
1647 | mldlen = skb_tail_pointer(skb) - skb_transport_header(skb); | |
1da177e4 LT |
1648 | pip6->payload_len = htons(payload_len); |
1649 | ||
6e7cb837 YH |
1650 | pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen, |
1651 | IPPROTO_ICMPV6, | |
1652 | csum_partial(skb_transport_header(skb), | |
1653 | mldlen, 0)); | |
41927178 | 1654 | |
4c9483b2 | 1655 | icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT, |
41927178 YH |
1656 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1657 | skb->dev->ifindex); | |
12fd84f4 | 1658 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
41927178 | 1659 | |
452edd59 DM |
1660 | err = 0; |
1661 | if (IS_ERR(dst)) { | |
1662 | err = PTR_ERR(dst); | |
1663 | dst = NULL; | |
1664 | } | |
adf30907 | 1665 | skb_dst_set(skb, dst); |
41927178 YH |
1666 | if (err) |
1667 | goto err_out; | |
1668 | ||
edf391ff NH |
1669 | payload_len = skb->len; |
1670 | ||
b2e0b385 | 1671 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
41927178 YH |
1672 | dst_output); |
1673 | out: | |
1da177e4 | 1674 | if (!err) { |
43a43b60 HFS |
1675 | ICMP6MSGOUT_INC_STATS(net, idev, ICMPV6_MLD2_REPORT); |
1676 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); | |
1677 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, payload_len); | |
1678 | } else { | |
1679 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); | |
1680 | } | |
1da177e4 | 1681 | |
96b52e61 | 1682 | rcu_read_unlock(); |
41927178 YH |
1683 | return; |
1684 | ||
1685 | err_out: | |
1686 | kfree_skb(skb); | |
1687 | goto out; | |
1da177e4 LT |
1688 | } |
1689 | ||
1690 | static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel) | |
1691 | { | |
fab10fe3 | 1692 | return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel); |
1da177e4 LT |
1693 | } |
1694 | ||
1695 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1696 | int type, struct mld2_grec **ppgr) | |
1697 | { | |
1698 | struct net_device *dev = pmc->idev->dev; | |
1699 | struct mld2_report *pmr; | |
1700 | struct mld2_grec *pgr; | |
1701 | ||
1702 | if (!skb) | |
8965779d | 1703 | skb = mld_newpack(pmc->idev, dev->mtu); |
1da177e4 LT |
1704 | if (!skb) |
1705 | return NULL; | |
1706 | pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec)); | |
1707 | pgr->grec_type = type; | |
1708 | pgr->grec_auxwords = 0; | |
1709 | pgr->grec_nsrcs = 0; | |
1710 | pgr->grec_mca = pmc->mca_addr; /* structure copy */ | |
9c70220b | 1711 | pmr = (struct mld2_report *)skb_transport_header(skb); |
6e7cb837 | 1712 | pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1); |
1da177e4 LT |
1713 | *ppgr = pgr; |
1714 | return skb; | |
1715 | } | |
1716 | ||
4c672e4b | 1717 | #define AVAILABLE(skb) ((skb) ? skb_availroom(skb) : 0) |
1da177e4 LT |
1718 | |
1719 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
6a7cc418 | 1720 | int type, int gdeleted, int sdeleted, int crsend) |
1da177e4 | 1721 | { |
8965779d AW |
1722 | struct inet6_dev *idev = pmc->idev; |
1723 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
1724 | struct mld2_report *pmr; |
1725 | struct mld2_grec *pgr = NULL; | |
1726 | struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list; | |
5ab4a6c8 | 1727 | int scount, stotal, first, isquery, truncate; |
1da177e4 LT |
1728 | |
1729 | if (pmc->mca_flags & MAF_NOREPORT) | |
1730 | return skb; | |
1731 | ||
1732 | isquery = type == MLD2_MODE_IS_INCLUDE || | |
1733 | type == MLD2_MODE_IS_EXCLUDE; | |
1734 | truncate = type == MLD2_MODE_IS_EXCLUDE || | |
1735 | type == MLD2_CHANGE_TO_EXCLUDE; | |
1736 | ||
5ab4a6c8 DS |
1737 | stotal = scount = 0; |
1738 | ||
1da177e4 LT |
1739 | psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources; |
1740 | ||
5ab4a6c8 DS |
1741 | if (!*psf_list) |
1742 | goto empty_source; | |
1743 | ||
9c70220b | 1744 | pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL; |
1da177e4 LT |
1745 | |
1746 | /* EX and TO_EX get a fresh packet, if needed */ | |
1747 | if (truncate) { | |
6e7cb837 | 1748 | if (pmr && pmr->mld2r_ngrec && |
1da177e4 LT |
1749 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { |
1750 | if (skb) | |
1751 | mld_sendpack(skb); | |
8965779d | 1752 | skb = mld_newpack(idev, dev->mtu); |
1da177e4 LT |
1753 | } |
1754 | } | |
1755 | first = 1; | |
1da177e4 | 1756 | psf_prev = NULL; |
67ba4152 | 1757 | for (psf = *psf_list; psf; psf = psf_next) { |
1da177e4 LT |
1758 | struct in6_addr *psrc; |
1759 | ||
1760 | psf_next = psf->sf_next; | |
1761 | ||
1762 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) { | |
1763 | psf_prev = psf; | |
1764 | continue; | |
1765 | } | |
1766 | ||
1767 | /* clear marks on query responses */ | |
1768 | if (isquery) | |
1769 | psf->sf_gsresp = 0; | |
1770 | ||
1771 | if (AVAILABLE(skb) < sizeof(*psrc) + | |
1772 | first*sizeof(struct mld2_grec)) { | |
1773 | if (truncate && !first) | |
1774 | break; /* truncate these */ | |
1775 | if (pgr) | |
1776 | pgr->grec_nsrcs = htons(scount); | |
1777 | if (skb) | |
1778 | mld_sendpack(skb); | |
8965779d | 1779 | skb = mld_newpack(idev, dev->mtu); |
1da177e4 LT |
1780 | first = 1; |
1781 | scount = 0; | |
1782 | } | |
1783 | if (first) { | |
1784 | skb = add_grhead(skb, pmc, type, &pgr); | |
1785 | first = 0; | |
1786 | } | |
cc63f70b AD |
1787 | if (!skb) |
1788 | return NULL; | |
1da177e4 LT |
1789 | psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc)); |
1790 | *psrc = psf->sf_addr; | |
5ab4a6c8 | 1791 | scount++; stotal++; |
1da177e4 LT |
1792 | if ((type == MLD2_ALLOW_NEW_SOURCES || |
1793 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) { | |
1794 | psf->sf_crcount--; | |
1795 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { | |
1796 | if (psf_prev) | |
1797 | psf_prev->sf_next = psf->sf_next; | |
1798 | else | |
1799 | *psf_list = psf->sf_next; | |
1800 | kfree(psf); | |
1801 | continue; | |
1802 | } | |
1803 | } | |
1804 | psf_prev = psf; | |
1805 | } | |
5ab4a6c8 DS |
1806 | |
1807 | empty_source: | |
1808 | if (!stotal) { | |
1809 | if (type == MLD2_ALLOW_NEW_SOURCES || | |
1810 | type == MLD2_BLOCK_OLD_SOURCES) | |
1811 | return skb; | |
6a7cc418 | 1812 | if (pmc->mca_crcount || isquery || crsend) { |
5ab4a6c8 DS |
1813 | /* make sure we have room for group header */ |
1814 | if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) { | |
1815 | mld_sendpack(skb); | |
1816 | skb = NULL; /* add_grhead will get a new one */ | |
1817 | } | |
1818 | skb = add_grhead(skb, pmc, type, &pgr); | |
1819 | } | |
1820 | } | |
1da177e4 LT |
1821 | if (pgr) |
1822 | pgr->grec_nsrcs = htons(scount); | |
1823 | ||
1824 | if (isquery) | |
1825 | pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */ | |
1826 | return skb; | |
1827 | } | |
1828 | ||
1829 | static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc) | |
1830 | { | |
1831 | struct sk_buff *skb = NULL; | |
1832 | int type; | |
1833 | ||
8965779d | 1834 | read_lock_bh(&idev->lock); |
1da177e4 | 1835 | if (!pmc) { |
67ba4152 | 1836 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
1837 | if (pmc->mca_flags & MAF_NOREPORT) |
1838 | continue; | |
1839 | spin_lock_bh(&pmc->mca_lock); | |
1840 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1841 | type = MLD2_MODE_IS_EXCLUDE; | |
1842 | else | |
1843 | type = MLD2_MODE_IS_INCLUDE; | |
6a7cc418 | 1844 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1da177e4 LT |
1845 | spin_unlock_bh(&pmc->mca_lock); |
1846 | } | |
1da177e4 LT |
1847 | } else { |
1848 | spin_lock_bh(&pmc->mca_lock); | |
1849 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1850 | type = MLD2_MODE_IS_EXCLUDE; | |
1851 | else | |
1852 | type = MLD2_MODE_IS_INCLUDE; | |
6a7cc418 | 1853 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1da177e4 LT |
1854 | spin_unlock_bh(&pmc->mca_lock); |
1855 | } | |
8965779d | 1856 | read_unlock_bh(&idev->lock); |
1da177e4 LT |
1857 | if (skb) |
1858 | mld_sendpack(skb); | |
1859 | } | |
1860 | ||
1861 | /* | |
1862 | * remove zero-count source records from a source filter list | |
1863 | */ | |
1864 | static void mld_clear_zeros(struct ip6_sf_list **ppsf) | |
1865 | { | |
1866 | struct ip6_sf_list *psf_prev, *psf_next, *psf; | |
1867 | ||
1868 | psf_prev = NULL; | |
67ba4152 | 1869 | for (psf = *ppsf; psf; psf = psf_next) { |
1da177e4 LT |
1870 | psf_next = psf->sf_next; |
1871 | if (psf->sf_crcount == 0) { | |
1872 | if (psf_prev) | |
1873 | psf_prev->sf_next = psf->sf_next; | |
1874 | else | |
1875 | *ppsf = psf->sf_next; | |
1876 | kfree(psf); | |
1877 | } else | |
1878 | psf_prev = psf; | |
1879 | } | |
1880 | } | |
1881 | ||
1882 | static void mld_send_cr(struct inet6_dev *idev) | |
1883 | { | |
1884 | struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next; | |
1885 | struct sk_buff *skb = NULL; | |
1886 | int type, dtype; | |
1887 | ||
1888 | read_lock_bh(&idev->lock); | |
6457d26b | 1889 | spin_lock(&idev->mc_lock); |
1da177e4 LT |
1890 | |
1891 | /* deleted MCA's */ | |
1892 | pmc_prev = NULL; | |
67ba4152 | 1893 | for (pmc = idev->mc_tomb; pmc; pmc = pmc_next) { |
1da177e4 LT |
1894 | pmc_next = pmc->next; |
1895 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
1896 | type = MLD2_BLOCK_OLD_SOURCES; | |
1897 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
6a7cc418 FL |
1898 | skb = add_grec(skb, pmc, type, 1, 0, 0); |
1899 | skb = add_grec(skb, pmc, dtype, 1, 1, 0); | |
1da177e4 LT |
1900 | } |
1901 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1902 | if (pmc->mca_sfmode == MCAST_EXCLUDE) { |
1903 | type = MLD2_CHANGE_TO_INCLUDE; | |
6a7cc418 | 1904 | skb = add_grec(skb, pmc, type, 1, 0, 0); |
1da177e4 | 1905 | } |
5ab4a6c8 | 1906 | pmc->mca_crcount--; |
1da177e4 LT |
1907 | if (pmc->mca_crcount == 0) { |
1908 | mld_clear_zeros(&pmc->mca_tomb); | |
1909 | mld_clear_zeros(&pmc->mca_sources); | |
1910 | } | |
1911 | } | |
1912 | if (pmc->mca_crcount == 0 && !pmc->mca_tomb && | |
1913 | !pmc->mca_sources) { | |
1914 | if (pmc_prev) | |
1915 | pmc_prev->next = pmc_next; | |
1916 | else | |
1917 | idev->mc_tomb = pmc_next; | |
1918 | in6_dev_put(pmc->idev); | |
1919 | kfree(pmc); | |
1920 | } else | |
1921 | pmc_prev = pmc; | |
1922 | } | |
6457d26b | 1923 | spin_unlock(&idev->mc_lock); |
1da177e4 LT |
1924 | |
1925 | /* change recs */ | |
67ba4152 | 1926 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
1927 | spin_lock_bh(&pmc->mca_lock); |
1928 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1929 | type = MLD2_BLOCK_OLD_SOURCES; | |
1930 | dtype = MLD2_ALLOW_NEW_SOURCES; | |
1931 | } else { | |
1932 | type = MLD2_ALLOW_NEW_SOURCES; | |
1933 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1934 | } | |
6a7cc418 FL |
1935 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1936 | skb = add_grec(skb, pmc, dtype, 0, 1, 0); /* deleted sources */ | |
1da177e4 LT |
1937 | |
1938 | /* filter mode changes */ | |
1939 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1940 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
1941 | type = MLD2_CHANGE_TO_EXCLUDE; | |
1942 | else | |
1943 | type = MLD2_CHANGE_TO_INCLUDE; | |
6a7cc418 | 1944 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
5ab4a6c8 | 1945 | pmc->mca_crcount--; |
1da177e4 LT |
1946 | } |
1947 | spin_unlock_bh(&pmc->mca_lock); | |
1948 | } | |
1949 | read_unlock_bh(&idev->lock); | |
1950 | if (!skb) | |
1951 | return; | |
1952 | (void) mld_sendpack(skb); | |
1953 | } | |
1954 | ||
1955 | static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type) | |
1956 | { | |
c346dca1 | 1957 | struct net *net = dev_net(dev); |
b8ad0cbc | 1958 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 | 1959 | struct inet6_dev *idev; |
1ab1457c | 1960 | struct sk_buff *skb; |
6e7cb837 | 1961 | struct mld_msg *hdr; |
d7aabf22 | 1962 | const struct in6_addr *snd_addr, *saddr; |
1da177e4 | 1963 | struct in6_addr addr_buf; |
a7ae1992 HX |
1964 | int hlen = LL_RESERVED_SPACE(dev); |
1965 | int tlen = dev->needed_tailroom; | |
1da177e4 LT |
1966 | int err, len, payload_len, full_len; |
1967 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1968 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1969 | IPV6_TLV_PADN, 0 }; | |
4c9483b2 | 1970 | struct flowi6 fl6; |
adf30907 | 1971 | struct dst_entry *dst; |
1da177e4 | 1972 | |
f3ee4010 YH |
1973 | if (type == ICMPV6_MGM_REDUCTION) |
1974 | snd_addr = &in6addr_linklocal_allrouters; | |
1975 | else | |
1976 | snd_addr = addr; | |
1da177e4 LT |
1977 | |
1978 | len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); | |
1979 | payload_len = len + sizeof(ra); | |
1980 | full_len = sizeof(struct ipv6hdr) + payload_len; | |
1981 | ||
edf391ff NH |
1982 | rcu_read_lock(); |
1983 | IP6_UPD_PO_STATS(net, __in6_dev_get(dev), | |
1984 | IPSTATS_MIB_OUT, full_len); | |
1985 | rcu_read_unlock(); | |
1986 | ||
a7ae1992 | 1987 | skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err); |
1da177e4 LT |
1988 | |
1989 | if (skb == NULL) { | |
a11d206d | 1990 | rcu_read_lock(); |
3bd653c8 | 1991 | IP6_INC_STATS(net, __in6_dev_get(dev), |
a11d206d YH |
1992 | IPSTATS_MIB_OUTDISCARDS); |
1993 | rcu_read_unlock(); | |
1da177e4 LT |
1994 | return; |
1995 | } | |
9d4a0314 | 1996 | skb->priority = TC_PRIO_CONTROL; |
a7ae1992 | 1997 | skb_reserve(skb, hlen); |
1da177e4 | 1998 | |
95c385b4 | 1999 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 2000 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 2001 | * use unspecified address as the source address |
1da177e4 LT |
2002 | * when a valid link-local address is not available. |
2003 | */ | |
d7aabf22 YH |
2004 | saddr = &in6addr_any; |
2005 | } else | |
2006 | saddr = &addr_buf; | |
1da177e4 | 2007 | |
2576f17d | 2008 | ip6_mc_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len); |
1da177e4 LT |
2009 | |
2010 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
2011 | ||
6e7cb837 YH |
2012 | hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg)); |
2013 | memset(hdr, 0, sizeof(struct mld_msg)); | |
2014 | hdr->mld_type = type; | |
4e3fd7a0 | 2015 | hdr->mld_mca = *addr; |
1da177e4 | 2016 | |
6e7cb837 YH |
2017 | hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len, |
2018 | IPPROTO_ICMPV6, | |
2019 | csum_partial(hdr, len, 0)); | |
1da177e4 | 2020 | |
96b52e61 ED |
2021 | rcu_read_lock(); |
2022 | idev = __in6_dev_get(skb->dev); | |
1da177e4 | 2023 | |
4c9483b2 | 2024 | icmpv6_flow_init(sk, &fl6, type, |
41927178 YH |
2025 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
2026 | skb->dev->ifindex); | |
12fd84f4 | 2027 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
452edd59 DM |
2028 | if (IS_ERR(dst)) { |
2029 | err = PTR_ERR(dst); | |
41927178 | 2030 | goto err_out; |
452edd59 | 2031 | } |
41927178 | 2032 | |
adf30907 | 2033 | skb_dst_set(skb, dst); |
b2e0b385 | 2034 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
41927178 YH |
2035 | dst_output); |
2036 | out: | |
1da177e4 | 2037 | if (!err) { |
5c5d244b | 2038 | ICMP6MSGOUT_INC_STATS(net, idev, type); |
a862f6a6 | 2039 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); |
edf391ff | 2040 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len); |
1da177e4 | 2041 | } else |
3bd653c8 | 2042 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 | 2043 | |
96b52e61 | 2044 | rcu_read_unlock(); |
1da177e4 | 2045 | return; |
41927178 YH |
2046 | |
2047 | err_out: | |
2048 | kfree_skb(skb); | |
2049 | goto out; | |
1da177e4 LT |
2050 | } |
2051 | ||
6a7cc418 | 2052 | static void mld_send_initial_cr(struct inet6_dev *idev) |
b173ee48 | 2053 | { |
6a7cc418 FL |
2054 | struct sk_buff *skb; |
2055 | struct ifmcaddr6 *pmc; | |
2056 | int type; | |
2057 | ||
2058 | if (mld_in_v1_mode(idev)) | |
2059 | return; | |
2060 | ||
2061 | skb = NULL; | |
2062 | read_lock_bh(&idev->lock); | |
67ba4152 | 2063 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
6a7cc418 FL |
2064 | spin_lock_bh(&pmc->mca_lock); |
2065 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2066 | type = MLD2_CHANGE_TO_EXCLUDE; | |
2067 | else | |
2068 | type = MLD2_CHANGE_TO_INCLUDE; | |
2069 | skb = add_grec(skb, pmc, type, 0, 0, 1); | |
2070 | spin_unlock_bh(&pmc->mca_lock); | |
b173ee48 | 2071 | } |
6a7cc418 FL |
2072 | read_unlock_bh(&idev->lock); |
2073 | if (skb) | |
2074 | mld_sendpack(skb); | |
b173ee48 HFS |
2075 | } |
2076 | ||
2077 | void ipv6_mc_dad_complete(struct inet6_dev *idev) | |
2078 | { | |
2079 | idev->mc_dad_count = idev->mc_qrv; | |
2080 | if (idev->mc_dad_count) { | |
6a7cc418 | 2081 | mld_send_initial_cr(idev); |
b173ee48 HFS |
2082 | idev->mc_dad_count--; |
2083 | if (idev->mc_dad_count) | |
2084 | mld_dad_start_timer(idev, idev->mc_maxdelay); | |
2085 | } | |
2086 | } | |
2087 | ||
2088 | static void mld_dad_timer_expire(unsigned long data) | |
2089 | { | |
2090 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2091 | ||
6a7cc418 | 2092 | mld_send_initial_cr(idev); |
b173ee48 HFS |
2093 | if (idev->mc_dad_count) { |
2094 | idev->mc_dad_count--; | |
2095 | if (idev->mc_dad_count) | |
2096 | mld_dad_start_timer(idev, idev->mc_maxdelay); | |
2097 | } | |
9260d3e1 | 2098 | in6_dev_put(idev); |
b173ee48 HFS |
2099 | } |
2100 | ||
1da177e4 | 2101 | static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode, |
b71d1d42 | 2102 | const struct in6_addr *psfsrc) |
1da177e4 LT |
2103 | { |
2104 | struct ip6_sf_list *psf, *psf_prev; | |
2105 | int rv = 0; | |
2106 | ||
2107 | psf_prev = NULL; | |
67ba4152 | 2108 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2109 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
2110 | break; | |
2111 | psf_prev = psf; | |
2112 | } | |
2113 | if (!psf || psf->sf_count[sfmode] == 0) { | |
2114 | /* source filter not found, or count wrong => bug */ | |
2115 | return -ESRCH; | |
2116 | } | |
2117 | psf->sf_count[sfmode]--; | |
2118 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { | |
2119 | struct inet6_dev *idev = pmc->idev; | |
2120 | ||
2121 | /* no more filters for this source */ | |
2122 | if (psf_prev) | |
2123 | psf_prev->sf_next = psf->sf_next; | |
2124 | else | |
2125 | pmc->mca_sources = psf->sf_next; | |
2126 | if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) && | |
6c567b78 | 2127 | !mld_in_v1_mode(idev)) { |
1da177e4 LT |
2128 | psf->sf_crcount = idev->mc_qrv; |
2129 | psf->sf_next = pmc->mca_tomb; | |
2130 | pmc->mca_tomb = psf; | |
2131 | rv = 1; | |
2132 | } else | |
2133 | kfree(psf); | |
2134 | } | |
2135 | return rv; | |
2136 | } | |
2137 | ||
b71d1d42 ED |
2138 | static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
2139 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
2140 | int delta) |
2141 | { | |
2142 | struct ifmcaddr6 *pmc; | |
2143 | int changerec = 0; | |
2144 | int i, err; | |
2145 | ||
2146 | if (!idev) | |
2147 | return -ENODEV; | |
2148 | read_lock_bh(&idev->lock); | |
67ba4152 | 2149 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
2150 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
2151 | break; | |
2152 | } | |
2153 | if (!pmc) { | |
2154 | /* MCA not found?? bug */ | |
2155 | read_unlock_bh(&idev->lock); | |
2156 | return -ESRCH; | |
2157 | } | |
2158 | spin_lock_bh(&pmc->mca_lock); | |
2159 | sf_markstate(pmc); | |
2160 | if (!delta) { | |
2161 | if (!pmc->mca_sfcount[sfmode]) { | |
2162 | spin_unlock_bh(&pmc->mca_lock); | |
2163 | read_unlock_bh(&idev->lock); | |
2164 | return -EINVAL; | |
2165 | } | |
2166 | pmc->mca_sfcount[sfmode]--; | |
2167 | } | |
2168 | err = 0; | |
67ba4152 | 2169 | for (i = 0; i < sfcount; i++) { |
1da177e4 LT |
2170 | int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); |
2171 | ||
2172 | changerec |= rv > 0; | |
2173 | if (!err && rv < 0) | |
2174 | err = rv; | |
2175 | } | |
2176 | if (pmc->mca_sfmode == MCAST_EXCLUDE && | |
2177 | pmc->mca_sfcount[MCAST_EXCLUDE] == 0 && | |
2178 | pmc->mca_sfcount[MCAST_INCLUDE]) { | |
2179 | struct ip6_sf_list *psf; | |
2180 | ||
2181 | /* filter mode change */ | |
2182 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2183 | pmc->mca_crcount = idev->mc_qrv; | |
2184 | idev->mc_ifc_count = pmc->mca_crcount; | |
67ba4152 | 2185 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2186 | psf->sf_crcount = 0; |
2187 | mld_ifc_event(pmc->idev); | |
2188 | } else if (sf_setstate(pmc) || changerec) | |
2189 | mld_ifc_event(pmc->idev); | |
2190 | spin_unlock_bh(&pmc->mca_lock); | |
2191 | read_unlock_bh(&idev->lock); | |
2192 | return err; | |
2193 | } | |
2194 | ||
2195 | /* | |
2196 | * Add multicast single-source filter to the interface list | |
2197 | */ | |
2198 | static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode, | |
99d2f47a | 2199 | const struct in6_addr *psfsrc) |
1da177e4 LT |
2200 | { |
2201 | struct ip6_sf_list *psf, *psf_prev; | |
2202 | ||
2203 | psf_prev = NULL; | |
67ba4152 | 2204 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2205 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
2206 | break; | |
2207 | psf_prev = psf; | |
2208 | } | |
2209 | if (!psf) { | |
0c600eda | 2210 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
1da177e4 LT |
2211 | if (!psf) |
2212 | return -ENOBUFS; | |
0c600eda | 2213 | |
1da177e4 LT |
2214 | psf->sf_addr = *psfsrc; |
2215 | if (psf_prev) { | |
2216 | psf_prev->sf_next = psf; | |
2217 | } else | |
2218 | pmc->mca_sources = psf; | |
2219 | } | |
2220 | psf->sf_count[sfmode]++; | |
2221 | return 0; | |
2222 | } | |
2223 | ||
2224 | static void sf_markstate(struct ifmcaddr6 *pmc) | |
2225 | { | |
2226 | struct ip6_sf_list *psf; | |
2227 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; | |
2228 | ||
67ba4152 | 2229 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2230 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
2231 | psf->sf_oldin = mca_xcount == | |
2232 | psf->sf_count[MCAST_EXCLUDE] && | |
2233 | !psf->sf_count[MCAST_INCLUDE]; | |
2234 | } else | |
2235 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; | |
2236 | } | |
2237 | ||
2238 | static int sf_setstate(struct ifmcaddr6 *pmc) | |
2239 | { | |
7add2a43 | 2240 | struct ip6_sf_list *psf, *dpsf; |
1da177e4 LT |
2241 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
2242 | int qrv = pmc->idev->mc_qrv; | |
2243 | int new_in, rv; | |
2244 | ||
2245 | rv = 0; | |
67ba4152 | 2246 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2247 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
2248 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && | |
2249 | !psf->sf_count[MCAST_INCLUDE]; | |
2250 | } else | |
2251 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; | |
7add2a43 DS |
2252 | if (new_in) { |
2253 | if (!psf->sf_oldin) { | |
e80e28b6 | 2254 | struct ip6_sf_list *prev = NULL; |
7add2a43 | 2255 | |
67ba4152 IM |
2256 | for (dpsf = pmc->mca_tomb; dpsf; |
2257 | dpsf = dpsf->sf_next) { | |
7add2a43 DS |
2258 | if (ipv6_addr_equal(&dpsf->sf_addr, |
2259 | &psf->sf_addr)) | |
2260 | break; | |
2261 | prev = dpsf; | |
2262 | } | |
2263 | if (dpsf) { | |
2264 | if (prev) | |
2265 | prev->sf_next = dpsf->sf_next; | |
2266 | else | |
2267 | pmc->mca_tomb = dpsf->sf_next; | |
2268 | kfree(dpsf); | |
2269 | } | |
2270 | psf->sf_crcount = qrv; | |
2271 | rv++; | |
2272 | } | |
2273 | } else if (psf->sf_oldin) { | |
2274 | psf->sf_crcount = 0; | |
2275 | /* | |
2276 | * add or update "delete" records if an active filter | |
2277 | * is now inactive | |
2278 | */ | |
67ba4152 | 2279 | for (dpsf = pmc->mca_tomb; dpsf; dpsf = dpsf->sf_next) |
7add2a43 DS |
2280 | if (ipv6_addr_equal(&dpsf->sf_addr, |
2281 | &psf->sf_addr)) | |
2282 | break; | |
2283 | if (!dpsf) { | |
5d55354f | 2284 | dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC); |
7add2a43 DS |
2285 | if (!dpsf) |
2286 | continue; | |
2287 | *dpsf = *psf; | |
2288 | /* pmc->mca_lock held by callers */ | |
2289 | dpsf->sf_next = pmc->mca_tomb; | |
2290 | pmc->mca_tomb = dpsf; | |
2291 | } | |
2292 | dpsf->sf_crcount = qrv; | |
1da177e4 LT |
2293 | rv++; |
2294 | } | |
2295 | } | |
2296 | return rv; | |
2297 | } | |
2298 | ||
2299 | /* | |
2300 | * Add multicast source filter list to the interface list | |
2301 | */ | |
b71d1d42 ED |
2302 | static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
2303 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
2304 | int delta) |
2305 | { | |
2306 | struct ifmcaddr6 *pmc; | |
2307 | int isexclude; | |
2308 | int i, err; | |
2309 | ||
2310 | if (!idev) | |
2311 | return -ENODEV; | |
2312 | read_lock_bh(&idev->lock); | |
67ba4152 | 2313 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
2314 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
2315 | break; | |
2316 | } | |
2317 | if (!pmc) { | |
2318 | /* MCA not found?? bug */ | |
2319 | read_unlock_bh(&idev->lock); | |
2320 | return -ESRCH; | |
2321 | } | |
2322 | spin_lock_bh(&pmc->mca_lock); | |
2323 | ||
2324 | sf_markstate(pmc); | |
2325 | isexclude = pmc->mca_sfmode == MCAST_EXCLUDE; | |
2326 | if (!delta) | |
2327 | pmc->mca_sfcount[sfmode]++; | |
2328 | err = 0; | |
67ba4152 | 2329 | for (i = 0; i < sfcount; i++) { |
99d2f47a | 2330 | err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]); |
1da177e4 LT |
2331 | if (err) |
2332 | break; | |
2333 | } | |
2334 | if (err) { | |
2335 | int j; | |
2336 | ||
2337 | if (!delta) | |
2338 | pmc->mca_sfcount[sfmode]--; | |
67ba4152 | 2339 | for (j = 0; j < i; j++) |
78d50217 | 2340 | ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]); |
1da177e4 | 2341 | } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) { |
1da177e4 LT |
2342 | struct ip6_sf_list *psf; |
2343 | ||
2344 | /* filter mode change */ | |
2345 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2346 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
2347 | else if (pmc->mca_sfcount[MCAST_INCLUDE]) | |
2348 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2349 | /* else no filters; keep old mode for reports */ | |
2350 | ||
2351 | pmc->mca_crcount = idev->mc_qrv; | |
2352 | idev->mc_ifc_count = pmc->mca_crcount; | |
67ba4152 | 2353 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2354 | psf->sf_crcount = 0; |
2355 | mld_ifc_event(idev); | |
2356 | } else if (sf_setstate(pmc)) | |
2357 | mld_ifc_event(idev); | |
2358 | spin_unlock_bh(&pmc->mca_lock); | |
2359 | read_unlock_bh(&idev->lock); | |
2360 | return err; | |
2361 | } | |
2362 | ||
2363 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc) | |
2364 | { | |
2365 | struct ip6_sf_list *psf, *nextpsf; | |
2366 | ||
67ba4152 | 2367 | for (psf = pmc->mca_tomb; psf; psf = nextpsf) { |
1da177e4 LT |
2368 | nextpsf = psf->sf_next; |
2369 | kfree(psf); | |
2370 | } | |
2371 | pmc->mca_tomb = NULL; | |
67ba4152 | 2372 | for (psf = pmc->mca_sources; psf; psf = nextpsf) { |
1da177e4 LT |
2373 | nextpsf = psf->sf_next; |
2374 | kfree(psf); | |
2375 | } | |
2376 | pmc->mca_sources = NULL; | |
2377 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
de9daad9 | 2378 | pmc->mca_sfcount[MCAST_INCLUDE] = 0; |
1da177e4 LT |
2379 | pmc->mca_sfcount[MCAST_EXCLUDE] = 1; |
2380 | } | |
2381 | ||
2382 | ||
2383 | static void igmp6_join_group(struct ifmcaddr6 *ma) | |
2384 | { | |
2385 | unsigned long delay; | |
2386 | ||
2387 | if (ma->mca_flags & MAF_NOREPORT) | |
2388 | return; | |
2389 | ||
2390 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2391 | ||
63862b5b | 2392 | delay = prandom_u32() % unsolicited_report_interval(ma->idev); |
1da177e4 LT |
2393 | |
2394 | spin_lock_bh(&ma->mca_lock); | |
2395 | if (del_timer(&ma->mca_timer)) { | |
2396 | atomic_dec(&ma->mca_refcnt); | |
2397 | delay = ma->mca_timer.expires - jiffies; | |
2398 | } | |
2399 | ||
2400 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
2401 | atomic_inc(&ma->mca_refcnt); | |
2402 | ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER; | |
2403 | spin_unlock_bh(&ma->mca_lock); | |
2404 | } | |
2405 | ||
2406 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
2407 | struct inet6_dev *idev) | |
2408 | { | |
2409 | int err; | |
2410 | ||
f7ed925c | 2411 | /* callers have the socket lock and rtnl lock |
5ab4a6c8 DS |
2412 | * so no other readers or writers of iml or its sflist |
2413 | */ | |
cfcabdcc | 2414 | if (!iml->sflist) { |
1da177e4 LT |
2415 | /* any-source empty exclude case */ |
2416 | return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0); | |
2417 | } | |
2418 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, | |
2419 | iml->sflist->sl_count, iml->sflist->sl_addr, 0); | |
2420 | sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max)); | |
2421 | iml->sflist = NULL; | |
2422 | return err; | |
2423 | } | |
2424 | ||
2425 | static void igmp6_leave_group(struct ifmcaddr6 *ma) | |
2426 | { | |
6c567b78 | 2427 | if (mld_in_v1_mode(ma->idev)) { |
1da177e4 LT |
2428 | if (ma->mca_flags & MAF_LAST_REPORTER) |
2429 | igmp6_send(&ma->mca_addr, ma->idev->dev, | |
2430 | ICMPV6_MGM_REDUCTION); | |
2431 | } else { | |
2432 | mld_add_delrec(ma->idev, ma); | |
2433 | mld_ifc_event(ma->idev); | |
2434 | } | |
2435 | } | |
2436 | ||
2437 | static void mld_gq_timer_expire(unsigned long data) | |
2438 | { | |
2439 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2440 | ||
2441 | idev->mc_gq_running = 0; | |
2442 | mld_send_report(idev, NULL); | |
9260d3e1 | 2443 | in6_dev_put(idev); |
1da177e4 LT |
2444 | } |
2445 | ||
2446 | static void mld_ifc_timer_expire(unsigned long data) | |
2447 | { | |
2448 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2449 | ||
2450 | mld_send_cr(idev); | |
2451 | if (idev->mc_ifc_count) { | |
2452 | idev->mc_ifc_count--; | |
2453 | if (idev->mc_ifc_count) | |
2454 | mld_ifc_start_timer(idev, idev->mc_maxdelay); | |
2455 | } | |
9260d3e1 | 2456 | in6_dev_put(idev); |
1da177e4 LT |
2457 | } |
2458 | ||
2459 | static void mld_ifc_event(struct inet6_dev *idev) | |
2460 | { | |
6c567b78 | 2461 | if (mld_in_v1_mode(idev)) |
1da177e4 LT |
2462 | return; |
2463 | idev->mc_ifc_count = idev->mc_qrv; | |
2464 | mld_ifc_start_timer(idev, 1); | |
2465 | } | |
2466 | ||
2467 | ||
2468 | static void igmp6_timer_handler(unsigned long data) | |
2469 | { | |
2470 | struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data; | |
2471 | ||
6c567b78 | 2472 | if (mld_in_v1_mode(ma->idev)) |
1da177e4 LT |
2473 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); |
2474 | else | |
2475 | mld_send_report(ma->idev, ma); | |
2476 | ||
2477 | spin_lock(&ma->mca_lock); | |
2478 | ma->mca_flags |= MAF_LAST_REPORTER; | |
2479 | ma->mca_flags &= ~MAF_TIMER_RUNNING; | |
2480 | spin_unlock(&ma->mca_lock); | |
2481 | ma_put(ma); | |
2482 | } | |
2483 | ||
75c78500 MS |
2484 | /* Device changing type */ |
2485 | ||
2486 | void ipv6_mc_unmap(struct inet6_dev *idev) | |
2487 | { | |
2488 | struct ifmcaddr6 *i; | |
2489 | ||
2490 | /* Install multicast list, except for all-nodes (already installed) */ | |
2491 | ||
2492 | read_lock_bh(&idev->lock); | |
2493 | for (i = idev->mc_list; i; i = i->next) | |
2494 | igmp6_group_dropped(i); | |
2495 | read_unlock_bh(&idev->lock); | |
2496 | } | |
2497 | ||
2498 | void ipv6_mc_remap(struct inet6_dev *idev) | |
2499 | { | |
2500 | ipv6_mc_up(idev); | |
2501 | } | |
2502 | ||
1da177e4 LT |
2503 | /* Device going down */ |
2504 | ||
2505 | void ipv6_mc_down(struct inet6_dev *idev) | |
2506 | { | |
2507 | struct ifmcaddr6 *i; | |
2508 | ||
2509 | /* Withdraw multicast list */ | |
2510 | ||
2511 | read_lock_bh(&idev->lock); | |
b4af8def DB |
2512 | mld_ifc_stop_timer(idev); |
2513 | mld_gq_stop_timer(idev); | |
2514 | mld_dad_stop_timer(idev); | |
1da177e4 | 2515 | |
67ba4152 | 2516 | for (i = idev->mc_list; i; i = i->next) |
1da177e4 LT |
2517 | igmp6_group_dropped(i); |
2518 | read_unlock_bh(&idev->lock); | |
2519 | ||
2520 | mld_clear_delrec(idev); | |
2521 | } | |
2522 | ||
2f711939 HFS |
2523 | static void ipv6_mc_reset(struct inet6_dev *idev) |
2524 | { | |
2525 | idev->mc_qrv = sysctl_mld_qrv; | |
2526 | idev->mc_qi = MLD_QI_DEFAULT; | |
2527 | idev->mc_qri = MLD_QRI_DEFAULT; | |
2528 | idev->mc_v1_seen = 0; | |
2529 | idev->mc_maxdelay = unsolicited_report_interval(idev); | |
2530 | } | |
1da177e4 LT |
2531 | |
2532 | /* Device going up */ | |
2533 | ||
2534 | void ipv6_mc_up(struct inet6_dev *idev) | |
2535 | { | |
2536 | struct ifmcaddr6 *i; | |
2537 | ||
2538 | /* Install multicast list, except for all-nodes (already installed) */ | |
2539 | ||
2540 | read_lock_bh(&idev->lock); | |
2f711939 | 2541 | ipv6_mc_reset(idev); |
67ba4152 | 2542 | for (i = idev->mc_list; i; i = i->next) |
1da177e4 LT |
2543 | igmp6_group_added(i); |
2544 | read_unlock_bh(&idev->lock); | |
2545 | } | |
2546 | ||
2547 | /* IPv6 device initialization. */ | |
2548 | ||
2549 | void ipv6_mc_init_dev(struct inet6_dev *idev) | |
2550 | { | |
1da177e4 | 2551 | write_lock_bh(&idev->lock); |
6457d26b | 2552 | spin_lock_init(&idev->mc_lock); |
1da177e4 | 2553 | idev->mc_gq_running = 0; |
b24b8a24 PE |
2554 | setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire, |
2555 | (unsigned long)idev); | |
1da177e4 LT |
2556 | idev->mc_tomb = NULL; |
2557 | idev->mc_ifc_count = 0; | |
b24b8a24 PE |
2558 | setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire, |
2559 | (unsigned long)idev); | |
b173ee48 HFS |
2560 | setup_timer(&idev->mc_dad_timer, mld_dad_timer_expire, |
2561 | (unsigned long)idev); | |
2f711939 | 2562 | ipv6_mc_reset(idev); |
1da177e4 | 2563 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
2564 | } |
2565 | ||
2566 | /* | |
2567 | * Device is about to be destroyed: clean up. | |
2568 | */ | |
2569 | ||
2570 | void ipv6_mc_destroy_dev(struct inet6_dev *idev) | |
2571 | { | |
2572 | struct ifmcaddr6 *i; | |
1da177e4 LT |
2573 | |
2574 | /* Deactivate timers */ | |
2575 | ipv6_mc_down(idev); | |
2576 | ||
2577 | /* Delete all-nodes address. */ | |
1da177e4 LT |
2578 | /* We cannot call ipv6_dev_mc_dec() directly, our caller in |
2579 | * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will | |
2580 | * fail. | |
2581 | */ | |
f3ee4010 | 2582 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes); |
1da177e4 | 2583 | |
f3ee4010 YH |
2584 | if (idev->cnf.forwarding) |
2585 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters); | |
1da177e4 LT |
2586 | |
2587 | write_lock_bh(&idev->lock); | |
2588 | while ((i = idev->mc_list) != NULL) { | |
2589 | idev->mc_list = i->next; | |
2590 | write_unlock_bh(&idev->lock); | |
2591 | ||
2592 | igmp6_group_dropped(i); | |
2593 | ma_put(i); | |
2594 | ||
2595 | write_lock_bh(&idev->lock); | |
2596 | } | |
2597 | write_unlock_bh(&idev->lock); | |
2598 | } | |
2599 | ||
2600 | #ifdef CONFIG_PROC_FS | |
2601 | struct igmp6_mc_iter_state { | |
b8ad0cbc | 2602 | struct seq_net_private p; |
1da177e4 LT |
2603 | struct net_device *dev; |
2604 | struct inet6_dev *idev; | |
2605 | }; | |
2606 | ||
2607 | #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private) | |
2608 | ||
2609 | static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq) | |
2610 | { | |
2611 | struct ifmcaddr6 *im = NULL; | |
2612 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
1218854a | 2613 | struct net *net = seq_file_net(seq); |
1da177e4 | 2614 | |
7562f876 | 2615 | state->idev = NULL; |
ce81b76a | 2616 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2617 | struct inet6_dev *idev; |
ce81b76a | 2618 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2619 | if (!idev) |
2620 | continue; | |
2621 | read_lock_bh(&idev->lock); | |
2622 | im = idev->mc_list; | |
2623 | if (im) { | |
2624 | state->idev = idev; | |
2625 | break; | |
2626 | } | |
2627 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2628 | } |
2629 | return im; | |
2630 | } | |
2631 | ||
2632 | static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im) | |
2633 | { | |
2634 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2635 | ||
2636 | im = im->next; | |
2637 | while (!im) { | |
ce81b76a | 2638 | if (likely(state->idev != NULL)) |
1da177e4 | 2639 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2640 | |
2641 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2642 | if (!state->dev) { |
2643 | state->idev = NULL; | |
2644 | break; | |
2645 | } | |
ce81b76a | 2646 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2647 | if (!state->idev) |
2648 | continue; | |
2649 | read_lock_bh(&state->idev->lock); | |
2650 | im = state->idev->mc_list; | |
2651 | } | |
2652 | return im; | |
2653 | } | |
2654 | ||
2655 | static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos) | |
2656 | { | |
2657 | struct ifmcaddr6 *im = igmp6_mc_get_first(seq); | |
2658 | if (im) | |
2659 | while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL) | |
2660 | --pos; | |
2661 | return pos ? NULL : im; | |
2662 | } | |
2663 | ||
2664 | static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2665 | __acquires(RCU) |
1da177e4 | 2666 | { |
ce81b76a | 2667 | rcu_read_lock(); |
1da177e4 LT |
2668 | return igmp6_mc_get_idx(seq, *pos); |
2669 | } | |
2670 | ||
2671 | static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2672 | { | |
ce81b76a ED |
2673 | struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v); |
2674 | ||
1da177e4 LT |
2675 | ++*pos; |
2676 | return im; | |
2677 | } | |
2678 | ||
2679 | static void igmp6_mc_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2680 | __releases(RCU) |
1da177e4 LT |
2681 | { |
2682 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
ce81b76a | 2683 | |
1da177e4 LT |
2684 | if (likely(state->idev != NULL)) { |
2685 | read_unlock_bh(&state->idev->lock); | |
1da177e4 LT |
2686 | state->idev = NULL; |
2687 | } | |
2688 | state->dev = NULL; | |
ce81b76a | 2689 | rcu_read_unlock(); |
1da177e4 LT |
2690 | } |
2691 | ||
2692 | static int igmp6_mc_seq_show(struct seq_file *seq, void *v) | |
2693 | { | |
2694 | struct ifmcaddr6 *im = (struct ifmcaddr6 *)v; | |
2695 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2696 | ||
2697 | seq_printf(seq, | |
4b7a4274 | 2698 | "%-4d %-15s %pi6 %5d %08X %ld\n", |
1da177e4 | 2699 | state->dev->ifindex, state->dev->name, |
b071195d | 2700 | &im->mca_addr, |
1da177e4 LT |
2701 | im->mca_users, im->mca_flags, |
2702 | (im->mca_flags&MAF_TIMER_RUNNING) ? | |
2703 | jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0); | |
2704 | return 0; | |
2705 | } | |
2706 | ||
56b3d975 | 2707 | static const struct seq_operations igmp6_mc_seq_ops = { |
1da177e4 LT |
2708 | .start = igmp6_mc_seq_start, |
2709 | .next = igmp6_mc_seq_next, | |
2710 | .stop = igmp6_mc_seq_stop, | |
2711 | .show = igmp6_mc_seq_show, | |
2712 | }; | |
2713 | ||
2714 | static int igmp6_mc_seq_open(struct inode *inode, struct file *file) | |
2715 | { | |
b8ad0cbc DL |
2716 | return seq_open_net(inode, file, &igmp6_mc_seq_ops, |
2717 | sizeof(struct igmp6_mc_iter_state)); | |
1da177e4 LT |
2718 | } |
2719 | ||
9a32144e | 2720 | static const struct file_operations igmp6_mc_seq_fops = { |
1da177e4 LT |
2721 | .owner = THIS_MODULE, |
2722 | .open = igmp6_mc_seq_open, | |
2723 | .read = seq_read, | |
2724 | .llseek = seq_lseek, | |
b8ad0cbc | 2725 | .release = seq_release_net, |
1da177e4 LT |
2726 | }; |
2727 | ||
2728 | struct igmp6_mcf_iter_state { | |
b8ad0cbc | 2729 | struct seq_net_private p; |
1da177e4 LT |
2730 | struct net_device *dev; |
2731 | struct inet6_dev *idev; | |
2732 | struct ifmcaddr6 *im; | |
2733 | }; | |
2734 | ||
2735 | #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private) | |
2736 | ||
2737 | static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq) | |
2738 | { | |
2739 | struct ip6_sf_list *psf = NULL; | |
2740 | struct ifmcaddr6 *im = NULL; | |
2741 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
1218854a | 2742 | struct net *net = seq_file_net(seq); |
1da177e4 | 2743 | |
7562f876 PE |
2744 | state->idev = NULL; |
2745 | state->im = NULL; | |
ce81b76a | 2746 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2747 | struct inet6_dev *idev; |
ce81b76a | 2748 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2749 | if (unlikely(idev == NULL)) |
2750 | continue; | |
2751 | read_lock_bh(&idev->lock); | |
2752 | im = idev->mc_list; | |
2753 | if (likely(im != NULL)) { | |
2754 | spin_lock_bh(&im->mca_lock); | |
2755 | psf = im->mca_sources; | |
2756 | if (likely(psf != NULL)) { | |
2757 | state->im = im; | |
2758 | state->idev = idev; | |
2759 | break; | |
2760 | } | |
2761 | spin_unlock_bh(&im->mca_lock); | |
2762 | } | |
2763 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2764 | } |
2765 | return psf; | |
2766 | } | |
2767 | ||
2768 | static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf) | |
2769 | { | |
2770 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2771 | ||
2772 | psf = psf->sf_next; | |
2773 | while (!psf) { | |
2774 | spin_unlock_bh(&state->im->mca_lock); | |
2775 | state->im = state->im->next; | |
2776 | while (!state->im) { | |
ce81b76a | 2777 | if (likely(state->idev != NULL)) |
1da177e4 | 2778 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2779 | |
2780 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2781 | if (!state->dev) { |
2782 | state->idev = NULL; | |
2783 | goto out; | |
2784 | } | |
ce81b76a | 2785 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2786 | if (!state->idev) |
2787 | continue; | |
2788 | read_lock_bh(&state->idev->lock); | |
2789 | state->im = state->idev->mc_list; | |
2790 | } | |
2791 | if (!state->im) | |
2792 | break; | |
2793 | spin_lock_bh(&state->im->mca_lock); | |
2794 | psf = state->im->mca_sources; | |
2795 | } | |
2796 | out: | |
2797 | return psf; | |
2798 | } | |
2799 | ||
2800 | static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos) | |
2801 | { | |
2802 | struct ip6_sf_list *psf = igmp6_mcf_get_first(seq); | |
2803 | if (psf) | |
2804 | while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL) | |
2805 | --pos; | |
2806 | return pos ? NULL : psf; | |
2807 | } | |
2808 | ||
2809 | static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2810 | __acquires(RCU) |
1da177e4 | 2811 | { |
ce81b76a | 2812 | rcu_read_lock(); |
1da177e4 LT |
2813 | return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
2814 | } | |
2815 | ||
2816 | static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2817 | { | |
2818 | struct ip6_sf_list *psf; | |
2819 | if (v == SEQ_START_TOKEN) | |
2820 | psf = igmp6_mcf_get_first(seq); | |
2821 | else | |
2822 | psf = igmp6_mcf_get_next(seq, v); | |
2823 | ++*pos; | |
2824 | return psf; | |
2825 | } | |
2826 | ||
2827 | static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2828 | __releases(RCU) |
1da177e4 LT |
2829 | { |
2830 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2831 | if (likely(state->im != NULL)) { | |
2832 | spin_unlock_bh(&state->im->mca_lock); | |
2833 | state->im = NULL; | |
2834 | } | |
2835 | if (likely(state->idev != NULL)) { | |
2836 | read_unlock_bh(&state->idev->lock); | |
1da177e4 LT |
2837 | state->idev = NULL; |
2838 | } | |
2839 | state->dev = NULL; | |
ce81b76a | 2840 | rcu_read_unlock(); |
1da177e4 LT |
2841 | } |
2842 | ||
2843 | static int igmp6_mcf_seq_show(struct seq_file *seq, void *v) | |
2844 | { | |
2845 | struct ip6_sf_list *psf = (struct ip6_sf_list *)v; | |
2846 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2847 | ||
2848 | if (v == SEQ_START_TOKEN) { | |
1744bea1 | 2849 | seq_puts(seq, "Idx Device Multicast Address Source Address INC EXC\n"); |
1da177e4 LT |
2850 | } else { |
2851 | seq_printf(seq, | |
4b7a4274 | 2852 | "%3d %6.6s %pi6 %pi6 %6lu %6lu\n", |
1da177e4 | 2853 | state->dev->ifindex, state->dev->name, |
b071195d HH |
2854 | &state->im->mca_addr, |
2855 | &psf->sf_addr, | |
1da177e4 LT |
2856 | psf->sf_count[MCAST_INCLUDE], |
2857 | psf->sf_count[MCAST_EXCLUDE]); | |
2858 | } | |
2859 | return 0; | |
2860 | } | |
2861 | ||
56b3d975 | 2862 | static const struct seq_operations igmp6_mcf_seq_ops = { |
1da177e4 LT |
2863 | .start = igmp6_mcf_seq_start, |
2864 | .next = igmp6_mcf_seq_next, | |
2865 | .stop = igmp6_mcf_seq_stop, | |
2866 | .show = igmp6_mcf_seq_show, | |
2867 | }; | |
2868 | ||
2869 | static int igmp6_mcf_seq_open(struct inode *inode, struct file *file) | |
2870 | { | |
b8ad0cbc DL |
2871 | return seq_open_net(inode, file, &igmp6_mcf_seq_ops, |
2872 | sizeof(struct igmp6_mcf_iter_state)); | |
1da177e4 LT |
2873 | } |
2874 | ||
9a32144e | 2875 | static const struct file_operations igmp6_mcf_seq_fops = { |
1da177e4 LT |
2876 | .owner = THIS_MODULE, |
2877 | .open = igmp6_mcf_seq_open, | |
2878 | .read = seq_read, | |
2879 | .llseek = seq_lseek, | |
b8ad0cbc | 2880 | .release = seq_release_net, |
1da177e4 | 2881 | }; |
ea82edf7 | 2882 | |
2c8c1e72 | 2883 | static int __net_init igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2884 | { |
2885 | int err; | |
2886 | ||
2887 | err = -ENOMEM; | |
d4beaa66 | 2888 | if (!proc_create("igmp6", S_IRUGO, net->proc_net, &igmp6_mc_seq_fops)) |
ea82edf7 | 2889 | goto out; |
d4beaa66 G |
2890 | if (!proc_create("mcfilter6", S_IRUGO, net->proc_net, |
2891 | &igmp6_mcf_seq_fops)) | |
ea82edf7 DL |
2892 | goto out_proc_net_igmp6; |
2893 | ||
2894 | err = 0; | |
2895 | out: | |
2896 | return err; | |
2897 | ||
2898 | out_proc_net_igmp6: | |
ece31ffd | 2899 | remove_proc_entry("igmp6", net->proc_net); |
ea82edf7 DL |
2900 | goto out; |
2901 | } | |
2902 | ||
2c8c1e72 | 2903 | static void __net_exit igmp6_proc_exit(struct net *net) |
ea82edf7 | 2904 | { |
ece31ffd G |
2905 | remove_proc_entry("mcfilter6", net->proc_net); |
2906 | remove_proc_entry("igmp6", net->proc_net); | |
ea82edf7 DL |
2907 | } |
2908 | #else | |
2c8c1e72 | 2909 | static inline int igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2910 | { |
2911 | return 0; | |
2912 | } | |
2c8c1e72 | 2913 | static inline void igmp6_proc_exit(struct net *net) |
ea82edf7 | 2914 | { |
ea82edf7 | 2915 | } |
1da177e4 LT |
2916 | #endif |
2917 | ||
2c8c1e72 | 2918 | static int __net_init igmp6_net_init(struct net *net) |
1da177e4 | 2919 | { |
1da177e4 LT |
2920 | int err; |
2921 | ||
1ed8516f DL |
2922 | err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6, |
2923 | SOCK_RAW, IPPROTO_ICMPV6, net); | |
1da177e4 | 2924 | if (err < 0) { |
f3213831 | 2925 | pr_err("Failed to initialize the IGMP6 control socket (err %d)\n", |
1da177e4 | 2926 | err); |
b8ad0cbc | 2927 | goto out; |
1da177e4 LT |
2928 | } |
2929 | ||
1ed8516f | 2930 | inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1; |
1da177e4 | 2931 | |
93a714d6 MC |
2932 | err = inet_ctl_sock_create(&net->ipv6.mc_autojoin_sk, PF_INET6, |
2933 | SOCK_RAW, IPPROTO_ICMPV6, net); | |
2934 | if (err < 0) { | |
2935 | pr_err("Failed to initialize the IGMP6 autojoin socket (err %d)\n", | |
2936 | err); | |
2937 | goto out_sock_create; | |
2938 | } | |
2939 | ||
ea82edf7 DL |
2940 | err = igmp6_proc_init(net); |
2941 | if (err) | |
93a714d6 MC |
2942 | goto out_sock_create_autojoin; |
2943 | ||
2944 | return 0; | |
b8ad0cbc | 2945 | |
93a714d6 MC |
2946 | out_sock_create_autojoin: |
2947 | inet_ctl_sock_destroy(net->ipv6.mc_autojoin_sk); | |
b8ad0cbc | 2948 | out_sock_create: |
1ed8516f | 2949 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
93a714d6 MC |
2950 | out: |
2951 | return err; | |
1da177e4 LT |
2952 | } |
2953 | ||
2c8c1e72 | 2954 | static void __net_exit igmp6_net_exit(struct net *net) |
1da177e4 | 2955 | { |
1ed8516f | 2956 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
93a714d6 | 2957 | inet_ctl_sock_destroy(net->ipv6.mc_autojoin_sk); |
ea82edf7 | 2958 | igmp6_proc_exit(net); |
1da177e4 | 2959 | } |
b8ad0cbc DL |
2960 | |
2961 | static struct pernet_operations igmp6_net_ops = { | |
2962 | .init = igmp6_net_init, | |
2963 | .exit = igmp6_net_exit, | |
2964 | }; | |
2965 | ||
2966 | int __init igmp6_init(void) | |
2967 | { | |
2968 | return register_pernet_subsys(&igmp6_net_ops); | |
2969 | } | |
2970 | ||
2971 | void igmp6_cleanup(void) | |
2972 | { | |
2973 | unregister_pernet_subsys(&igmp6_net_ops); | |
2974 | } |