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Commit | Line | Data |
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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 | ||
54ff9ef3 | 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 | ||
63159f29 | 160 | if (!mc_lst) |
1da177e4 LT |
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 | 175 | |
63159f29 | 176 | if (!dev) { |
1da177e4 LT |
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 | } | |
46a4dee0 | 202 | EXPORT_SYMBOL(ipv6_sock_mc_join); |
1da177e4 LT |
203 | |
204 | /* | |
205 | * socket leave on multicast group | |
206 | */ | |
54ff9ef3 | 207 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) |
1da177e4 LT |
208 | { |
209 | struct ipv6_pinfo *np = inet6_sk(sk); | |
456b61bc ED |
210 | struct ipv6_mc_socklist *mc_lst; |
211 | struct ipv6_mc_socklist __rcu **lnk; | |
3b1e0a65 | 212 | struct net *net = sock_net(sk); |
1da177e4 | 213 | |
46a4dee0 MC |
214 | ASSERT_RTNL(); |
215 | ||
a858d64b LW |
216 | if (!ipv6_addr_is_multicast(addr)) |
217 | return -EINVAL; | |
218 | ||
456b61bc | 219 | for (lnk = &np->ipv6_mc_list; |
b5350916 | 220 | (mc_lst = rtnl_dereference(*lnk)) != NULL; |
456b61bc | 221 | lnk = &mc_lst->next) { |
1da177e4 LT |
222 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
223 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
224 | struct net_device *dev; | |
225 | ||
226 | *lnk = mc_lst->next; | |
1da177e4 | 227 | |
414b6c94 | 228 | dev = __dev_get_by_index(net, mc_lst->ifindex); |
53b24b8f | 229 | if (dev) { |
96b52e61 | 230 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 231 | |
acd6e00b | 232 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 233 | if (idev) |
1da177e4 | 234 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
235 | } else |
236 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
a9ed4a29 | 237 | |
456b61bc | 238 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 239 | kfree_rcu(mc_lst, rcu); |
1da177e4 LT |
240 | return 0; |
241 | } | |
242 | } | |
1da177e4 | 243 | |
9951f036 | 244 | return -EADDRNOTAVAIL; |
1da177e4 | 245 | } |
46a4dee0 | 246 | EXPORT_SYMBOL(ipv6_sock_mc_drop); |
1da177e4 | 247 | |
96b52e61 ED |
248 | /* called with rcu_read_lock() */ |
249 | static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net, | |
b71d1d42 | 250 | const struct in6_addr *group, |
96b52e61 | 251 | int ifindex) |
1da177e4 LT |
252 | { |
253 | struct net_device *dev = NULL; | |
254 | struct inet6_dev *idev = NULL; | |
255 | ||
256 | if (ifindex == 0) { | |
96b52e61 | 257 | struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0); |
1da177e4 | 258 | |
1da177e4 | 259 | if (rt) { |
d1918542 | 260 | dev = rt->dst.dev; |
94e187c0 | 261 | ip6_rt_put(rt); |
1da177e4 LT |
262 | } |
263 | } else | |
96b52e61 | 264 | dev = dev_get_by_index_rcu(net, ifindex); |
1da177e4 LT |
265 | |
266 | if (!dev) | |
96b52e61 ED |
267 | return NULL; |
268 | idev = __in6_dev_get(dev); | |
448eb71f | 269 | if (!idev) |
8a22c99a | 270 | return NULL; |
1da177e4 | 271 | read_lock_bh(&idev->lock); |
96b52e61 ED |
272 | if (idev->dead) { |
273 | read_unlock_bh(&idev->lock); | |
274 | return NULL; | |
275 | } | |
1da177e4 LT |
276 | return idev; |
277 | } | |
278 | ||
279 | void ipv6_sock_mc_close(struct sock *sk) | |
280 | { | |
281 | struct ipv6_pinfo *np = inet6_sk(sk); | |
282 | struct ipv6_mc_socklist *mc_lst; | |
3b1e0a65 | 283 | struct net *net = sock_net(sk); |
1da177e4 | 284 | |
0e1efe9d ED |
285 | if (!rcu_access_pointer(np->ipv6_mc_list)) |
286 | return; | |
287 | ||
a9ed4a29 | 288 | rtnl_lock(); |
b5350916 | 289 | while ((mc_lst = rtnl_dereference(np->ipv6_mc_list)) != NULL) { |
1da177e4 LT |
290 | struct net_device *dev; |
291 | ||
292 | np->ipv6_mc_list = mc_lst->next; | |
1da177e4 | 293 | |
414b6c94 | 294 | dev = __dev_get_by_index(net, mc_lst->ifindex); |
1da177e4 | 295 | if (dev) { |
96b52e61 | 296 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 297 | |
acd6e00b | 298 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 299 | if (idev) |
1da177e4 | 300 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
301 | } else |
302 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
1da177e4 | 303 | |
456b61bc | 304 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 305 | kfree_rcu(mc_lst, rcu); |
456b61bc | 306 | |
1da177e4 | 307 | } |
a9ed4a29 | 308 | rtnl_unlock(); |
1da177e4 LT |
309 | } |
310 | ||
311 | int ip6_mc_source(int add, int omode, struct sock *sk, | |
312 | struct group_source_req *pgsr) | |
313 | { | |
314 | struct in6_addr *source, *group; | |
315 | struct ipv6_mc_socklist *pmc; | |
1da177e4 LT |
316 | struct inet6_dev *idev; |
317 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
318 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 319 | struct net *net = sock_net(sk); |
1da177e4 | 320 | int i, j, rv; |
c9e3e8b6 | 321 | int leavegroup = 0; |
5ab4a6c8 | 322 | int pmclocked = 0; |
1da177e4 LT |
323 | int err; |
324 | ||
1da177e4 LT |
325 | source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr; |
326 | group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr; | |
327 | ||
328 | if (!ipv6_addr_is_multicast(group)) | |
329 | return -EINVAL; | |
330 | ||
96b52e61 ED |
331 | rcu_read_lock(); |
332 | idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface); | |
333 | if (!idev) { | |
334 | rcu_read_unlock(); | |
1da177e4 | 335 | return -ENODEV; |
96b52e61 | 336 | } |
1da177e4 LT |
337 | |
338 | err = -EADDRNOTAVAIL; | |
339 | ||
456b61bc | 340 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
341 | if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface) |
342 | continue; | |
343 | if (ipv6_addr_equal(&pmc->addr, group)) | |
344 | break; | |
345 | } | |
917f2f10 DS |
346 | if (!pmc) { /* must have a prior join */ |
347 | err = -EINVAL; | |
1da177e4 | 348 | goto done; |
917f2f10 | 349 | } |
1da177e4 LT |
350 | /* if a source filter was set, must be the same mode as before */ |
351 | if (pmc->sflist) { | |
917f2f10 DS |
352 | if (pmc->sfmode != omode) { |
353 | err = -EINVAL; | |
1da177e4 | 354 | goto done; |
917f2f10 | 355 | } |
1da177e4 LT |
356 | } else if (pmc->sfmode != omode) { |
357 | /* allow mode switches for empty-set filters */ | |
358 | ip6_mc_add_src(idev, group, omode, 0, NULL, 0); | |
359 | ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
360 | pmc->sfmode = omode; | |
361 | } | |
362 | ||
96b52e61 | 363 | write_lock(&pmc->sflock); |
5ab4a6c8 DS |
364 | pmclocked = 1; |
365 | ||
1da177e4 LT |
366 | psl = pmc->sflist; |
367 | if (!add) { | |
368 | if (!psl) | |
917f2f10 | 369 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 370 | rv = !0; |
67ba4152 | 371 | for (i = 0; i < psl->sl_count; i++) { |
07c2fecc | 372 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
1da177e4 LT |
373 | if (rv == 0) |
374 | break; | |
375 | } | |
376 | if (rv) /* source not found */ | |
917f2f10 | 377 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 378 | |
c9e3e8b6 DS |
379 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
380 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { | |
381 | leavegroup = 1; | |
382 | goto done; | |
383 | } | |
384 | ||
1da177e4 LT |
385 | /* update the interface filter */ |
386 | ip6_mc_del_src(idev, group, omode, 1, source, 1); | |
387 | ||
67ba4152 | 388 | for (j = i+1; j < psl->sl_count; j++) |
1da177e4 LT |
389 | psl->sl_addr[j-1] = psl->sl_addr[j]; |
390 | psl->sl_count--; | |
391 | err = 0; | |
392 | goto done; | |
393 | } | |
394 | /* else, add a new source to the filter */ | |
395 | ||
396 | if (psl && psl->sl_count >= sysctl_mld_max_msf) { | |
397 | err = -ENOBUFS; | |
398 | goto done; | |
399 | } | |
400 | if (!psl || psl->sl_count == psl->sl_max) { | |
401 | struct ip6_sf_socklist *newpsl; | |
402 | int count = IP6_SFBLOCK; | |
403 | ||
404 | if (psl) | |
405 | count += psl->sl_max; | |
8b3a7005 | 406 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC); |
1da177e4 LT |
407 | if (!newpsl) { |
408 | err = -ENOBUFS; | |
409 | goto done; | |
410 | } | |
411 | newpsl->sl_max = count; | |
412 | newpsl->sl_count = count - IP6_SFBLOCK; | |
413 | if (psl) { | |
67ba4152 | 414 | for (i = 0; i < psl->sl_count; i++) |
1da177e4 LT |
415 | newpsl->sl_addr[i] = psl->sl_addr[i]; |
416 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
417 | } | |
418 | pmc->sflist = psl = newpsl; | |
419 | } | |
420 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ | |
67ba4152 | 421 | for (i = 0; i < psl->sl_count; i++) { |
07c2fecc | 422 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
56db1c5f JS |
423 | if (rv == 0) /* There is an error in the address. */ |
424 | goto done; | |
1da177e4 | 425 | } |
67ba4152 | 426 | for (j = psl->sl_count-1; j >= i; j--) |
1da177e4 LT |
427 | psl->sl_addr[j+1] = psl->sl_addr[j]; |
428 | psl->sl_addr[i] = *source; | |
429 | psl->sl_count++; | |
430 | err = 0; | |
431 | /* update the interface list */ | |
432 | ip6_mc_add_src(idev, group, omode, 1, source, 1); | |
433 | done: | |
5ab4a6c8 | 434 | if (pmclocked) |
96b52e61 | 435 | write_unlock(&pmc->sflock); |
1da177e4 | 436 | read_unlock_bh(&idev->lock); |
96b52e61 | 437 | rcu_read_unlock(); |
c9e3e8b6 | 438 | if (leavegroup) |
54ff9ef3 | 439 | err = ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group); |
1da177e4 LT |
440 | return err; |
441 | } | |
442 | ||
443 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) | |
444 | { | |
b71d1d42 | 445 | const struct in6_addr *group; |
1da177e4 | 446 | struct ipv6_mc_socklist *pmc; |
1da177e4 LT |
447 | struct inet6_dev *idev; |
448 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
449 | struct ip6_sf_socklist *newpsl, *psl; | |
3b1e0a65 | 450 | struct net *net = sock_net(sk); |
9951f036 | 451 | int leavegroup = 0; |
1da177e4 LT |
452 | int i, err; |
453 | ||
454 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
455 | ||
456 | if (!ipv6_addr_is_multicast(group)) | |
457 | return -EINVAL; | |
458 | if (gsf->gf_fmode != MCAST_INCLUDE && | |
459 | gsf->gf_fmode != MCAST_EXCLUDE) | |
460 | return -EINVAL; | |
461 | ||
96b52e61 ED |
462 | rcu_read_lock(); |
463 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 464 | |
96b52e61 ED |
465 | if (!idev) { |
466 | rcu_read_unlock(); | |
1da177e4 | 467 | return -ENODEV; |
96b52e61 | 468 | } |
1da177e4 | 469 | |
9c05989b | 470 | err = 0; |
5ab4a6c8 | 471 | |
9951f036 DS |
472 | if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) { |
473 | leavegroup = 1; | |
474 | goto done; | |
475 | } | |
476 | ||
456b61bc | 477 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
478 | if (pmc->ifindex != gsf->gf_interface) |
479 | continue; | |
480 | if (ipv6_addr_equal(&pmc->addr, group)) | |
481 | break; | |
482 | } | |
917f2f10 DS |
483 | if (!pmc) { /* must have a prior join */ |
484 | err = -EINVAL; | |
1da177e4 | 485 | goto done; |
917f2f10 | 486 | } |
1da177e4 | 487 | if (gsf->gf_numsrc) { |
8b3a7005 KK |
488 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc), |
489 | GFP_ATOMIC); | |
1da177e4 LT |
490 | if (!newpsl) { |
491 | err = -ENOBUFS; | |
492 | goto done; | |
493 | } | |
494 | newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc; | |
67ba4152 | 495 | for (i = 0; i < newpsl->sl_count; ++i) { |
1da177e4 LT |
496 | struct sockaddr_in6 *psin6; |
497 | ||
498 | psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i]; | |
499 | newpsl->sl_addr[i] = psin6->sin6_addr; | |
500 | } | |
501 | err = ip6_mc_add_src(idev, group, gsf->gf_fmode, | |
502 | newpsl->sl_count, newpsl->sl_addr, 0); | |
503 | if (err) { | |
504 | sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); | |
505 | goto done; | |
506 | } | |
8713dbf0 | 507 | } else { |
1da177e4 | 508 | newpsl = NULL; |
8713dbf0 YZ |
509 | (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); |
510 | } | |
5ab4a6c8 | 511 | |
96b52e61 | 512 | write_lock(&pmc->sflock); |
1da177e4 LT |
513 | psl = pmc->sflist; |
514 | if (psl) { | |
515 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, | |
516 | psl->sl_count, psl->sl_addr, 0); | |
517 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
518 | } else | |
519 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
520 | pmc->sflist = newpsl; | |
521 | pmc->sfmode = gsf->gf_fmode; | |
96b52e61 | 522 | write_unlock(&pmc->sflock); |
917f2f10 | 523 | err = 0; |
1da177e4 LT |
524 | done: |
525 | read_unlock_bh(&idev->lock); | |
96b52e61 | 526 | rcu_read_unlock(); |
9951f036 DS |
527 | if (leavegroup) |
528 | err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group); | |
1da177e4 LT |
529 | return err; |
530 | } | |
531 | ||
532 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
533 | struct group_filter __user *optval, int __user *optlen) | |
534 | { | |
535 | int err, i, count, copycount; | |
b71d1d42 | 536 | const struct in6_addr *group; |
1da177e4 LT |
537 | struct ipv6_mc_socklist *pmc; |
538 | struct inet6_dev *idev; | |
1da177e4 LT |
539 | struct ipv6_pinfo *inet6 = inet6_sk(sk); |
540 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 541 | struct net *net = sock_net(sk); |
1da177e4 LT |
542 | |
543 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
544 | ||
545 | if (!ipv6_addr_is_multicast(group)) | |
546 | return -EINVAL; | |
547 | ||
96b52e61 ED |
548 | rcu_read_lock(); |
549 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 550 | |
96b52e61 ED |
551 | if (!idev) { |
552 | rcu_read_unlock(); | |
1da177e4 | 553 | return -ENODEV; |
96b52e61 | 554 | } |
1da177e4 LT |
555 | |
556 | err = -EADDRNOTAVAIL; | |
f7ed925c WC |
557 | /* changes to the ipv6_mc_list require the socket lock and |
558 | * rtnl lock. We have the socket lock and rcu read lock, | |
5ab4a6c8 DS |
559 | * so reading the list is safe. |
560 | */ | |
1da177e4 | 561 | |
456b61bc | 562 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
563 | if (pmc->ifindex != gsf->gf_interface) |
564 | continue; | |
565 | if (ipv6_addr_equal(group, &pmc->addr)) | |
566 | break; | |
567 | } | |
568 | if (!pmc) /* must have a prior join */ | |
569 | goto done; | |
570 | gsf->gf_fmode = pmc->sfmode; | |
571 | psl = pmc->sflist; | |
572 | count = psl ? psl->sl_count : 0; | |
573 | read_unlock_bh(&idev->lock); | |
96b52e61 | 574 | rcu_read_unlock(); |
1da177e4 LT |
575 | |
576 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; | |
577 | gsf->gf_numsrc = count; | |
578 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || | |
579 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { | |
580 | return -EFAULT; | |
581 | } | |
f7ed925c WC |
582 | /* changes to psl require the socket lock, and a write lock |
583 | * on pmc->sflock. We have the socket lock so reading here is safe. | |
5ab4a6c8 | 584 | */ |
67ba4152 | 585 | for (i = 0; i < copycount; i++) { |
1da177e4 LT |
586 | struct sockaddr_in6 *psin6; |
587 | struct sockaddr_storage ss; | |
588 | ||
589 | psin6 = (struct sockaddr_in6 *)&ss; | |
590 | memset(&ss, 0, sizeof(ss)); | |
591 | psin6->sin6_family = AF_INET6; | |
592 | psin6->sin6_addr = psl->sl_addr[i]; | |
1ab1457c | 593 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) |
1da177e4 LT |
594 | return -EFAULT; |
595 | } | |
596 | return 0; | |
597 | done: | |
598 | read_unlock_bh(&idev->lock); | |
96b52e61 | 599 | rcu_read_unlock(); |
1da177e4 LT |
600 | return err; |
601 | } | |
602 | ||
a50feda5 ED |
603 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, |
604 | const struct in6_addr *src_addr) | |
1da177e4 LT |
605 | { |
606 | struct ipv6_pinfo *np = inet6_sk(sk); | |
607 | struct ipv6_mc_socklist *mc; | |
608 | struct ip6_sf_socklist *psl; | |
a50feda5 | 609 | bool rv = true; |
1da177e4 | 610 | |
456b61bc ED |
611 | rcu_read_lock(); |
612 | for_each_pmc_rcu(np, mc) { | |
1da177e4 LT |
613 | if (ipv6_addr_equal(&mc->addr, mc_addr)) |
614 | break; | |
615 | } | |
616 | if (!mc) { | |
456b61bc | 617 | rcu_read_unlock(); |
a50feda5 | 618 | return true; |
1da177e4 | 619 | } |
5ab4a6c8 | 620 | read_lock(&mc->sflock); |
1da177e4 LT |
621 | psl = mc->sflist; |
622 | if (!psl) { | |
623 | rv = mc->sfmode == MCAST_EXCLUDE; | |
624 | } else { | |
625 | int i; | |
626 | ||
67ba4152 | 627 | for (i = 0; i < psl->sl_count; i++) { |
1da177e4 LT |
628 | if (ipv6_addr_equal(&psl->sl_addr[i], src_addr)) |
629 | break; | |
630 | } | |
631 | if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) | |
a50feda5 | 632 | rv = false; |
1da177e4 | 633 | if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) |
a50feda5 | 634 | rv = false; |
1da177e4 | 635 | } |
5ab4a6c8 | 636 | read_unlock(&mc->sflock); |
456b61bc | 637 | rcu_read_unlock(); |
1da177e4 LT |
638 | |
639 | return rv; | |
640 | } | |
641 | ||
1da177e4 LT |
642 | static void igmp6_group_added(struct ifmcaddr6 *mc) |
643 | { | |
644 | struct net_device *dev = mc->idev->dev; | |
645 | char buf[MAX_ADDR_LEN]; | |
646 | ||
ec16ef22 YH |
647 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
648 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
649 | return; | |
650 | ||
1da177e4 LT |
651 | spin_lock_bh(&mc->mca_lock); |
652 | if (!(mc->mca_flags&MAF_LOADED)) { | |
653 | mc->mca_flags |= MAF_LOADED; | |
654 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 655 | dev_mc_add(dev, buf); |
1da177e4 LT |
656 | } |
657 | spin_unlock_bh(&mc->mca_lock); | |
658 | ||
659 | if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT)) | |
660 | return; | |
661 | ||
6c567b78 | 662 | if (mld_in_v1_mode(mc->idev)) { |
1da177e4 LT |
663 | igmp6_join_group(mc); |
664 | return; | |
665 | } | |
666 | /* else v2 */ | |
667 | ||
668 | mc->mca_crcount = mc->idev->mc_qrv; | |
669 | mld_ifc_event(mc->idev); | |
670 | } | |
671 | ||
672 | static void igmp6_group_dropped(struct ifmcaddr6 *mc) | |
673 | { | |
674 | struct net_device *dev = mc->idev->dev; | |
675 | char buf[MAX_ADDR_LEN]; | |
676 | ||
ec16ef22 YH |
677 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
678 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
679 | return; | |
680 | ||
1da177e4 LT |
681 | spin_lock_bh(&mc->mca_lock); |
682 | if (mc->mca_flags&MAF_LOADED) { | |
683 | mc->mca_flags &= ~MAF_LOADED; | |
684 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 685 | dev_mc_del(dev, buf); |
1da177e4 LT |
686 | } |
687 | ||
688 | if (mc->mca_flags & MAF_NOREPORT) | |
689 | goto done; | |
690 | spin_unlock_bh(&mc->mca_lock); | |
691 | ||
692 | if (!mc->idev->dead) | |
693 | igmp6_leave_group(mc); | |
694 | ||
695 | spin_lock_bh(&mc->mca_lock); | |
696 | if (del_timer(&mc->mca_timer)) | |
697 | atomic_dec(&mc->mca_refcnt); | |
698 | done: | |
699 | ip6_mc_clear_src(mc); | |
700 | spin_unlock_bh(&mc->mca_lock); | |
701 | } | |
702 | ||
703 | /* | |
704 | * deleted ifmcaddr6 manipulation | |
705 | */ | |
706 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) | |
707 | { | |
708 | struct ifmcaddr6 *pmc; | |
709 | ||
710 | /* this is an "ifmcaddr6" for convenience; only the fields below | |
711 | * are actually used. In particular, the refcnt and users are not | |
712 | * used for management of the delete list. Using the same structure | |
713 | * for deleted items allows change reports to use common code with | |
714 | * non-deleted or query-response MCA's. | |
715 | */ | |
0c600eda | 716 | pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC); |
1da177e4 LT |
717 | if (!pmc) |
718 | return; | |
0c600eda | 719 | |
1da177e4 LT |
720 | spin_lock_bh(&im->mca_lock); |
721 | spin_lock_init(&pmc->mca_lock); | |
722 | pmc->idev = im->idev; | |
723 | in6_dev_hold(idev); | |
724 | pmc->mca_addr = im->mca_addr; | |
725 | pmc->mca_crcount = idev->mc_qrv; | |
726 | pmc->mca_sfmode = im->mca_sfmode; | |
727 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
728 | struct ip6_sf_list *psf; | |
729 | ||
730 | pmc->mca_tomb = im->mca_tomb; | |
731 | pmc->mca_sources = im->mca_sources; | |
732 | im->mca_tomb = im->mca_sources = NULL; | |
67ba4152 | 733 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
734 | psf->sf_crcount = pmc->mca_crcount; |
735 | } | |
736 | spin_unlock_bh(&im->mca_lock); | |
737 | ||
6457d26b | 738 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
739 | pmc->next = idev->mc_tomb; |
740 | idev->mc_tomb = pmc; | |
6457d26b | 741 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
742 | } |
743 | ||
b71d1d42 | 744 | static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *pmca) |
1da177e4 LT |
745 | { |
746 | struct ifmcaddr6 *pmc, *pmc_prev; | |
747 | struct ip6_sf_list *psf, *psf_next; | |
748 | ||
6457d26b | 749 | spin_lock_bh(&idev->mc_lock); |
1da177e4 | 750 | pmc_prev = NULL; |
67ba4152 | 751 | for (pmc = idev->mc_tomb; pmc; pmc = pmc->next) { |
1da177e4 LT |
752 | if (ipv6_addr_equal(&pmc->mca_addr, pmca)) |
753 | break; | |
754 | pmc_prev = pmc; | |
755 | } | |
756 | if (pmc) { | |
757 | if (pmc_prev) | |
758 | pmc_prev->next = pmc->next; | |
759 | else | |
760 | idev->mc_tomb = pmc->next; | |
761 | } | |
6457d26b SH |
762 | spin_unlock_bh(&idev->mc_lock); |
763 | ||
1da177e4 | 764 | if (pmc) { |
67ba4152 | 765 | for (psf = pmc->mca_tomb; psf; psf = psf_next) { |
1da177e4 LT |
766 | psf_next = psf->sf_next; |
767 | kfree(psf); | |
768 | } | |
769 | in6_dev_put(pmc->idev); | |
770 | kfree(pmc); | |
771 | } | |
772 | } | |
773 | ||
774 | static void mld_clear_delrec(struct inet6_dev *idev) | |
775 | { | |
776 | struct ifmcaddr6 *pmc, *nextpmc; | |
777 | ||
6457d26b | 778 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
779 | pmc = idev->mc_tomb; |
780 | idev->mc_tomb = NULL; | |
6457d26b | 781 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
782 | |
783 | for (; pmc; pmc = nextpmc) { | |
784 | nextpmc = pmc->next; | |
785 | ip6_mc_clear_src(pmc); | |
786 | in6_dev_put(pmc->idev); | |
787 | kfree(pmc); | |
788 | } | |
789 | ||
790 | /* clear dead sources, too */ | |
791 | read_lock_bh(&idev->lock); | |
67ba4152 | 792 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
793 | struct ip6_sf_list *psf, *psf_next; |
794 | ||
795 | spin_lock_bh(&pmc->mca_lock); | |
796 | psf = pmc->mca_tomb; | |
797 | pmc->mca_tomb = NULL; | |
798 | spin_unlock_bh(&pmc->mca_lock); | |
67ba4152 | 799 | for (; psf; psf = psf_next) { |
1da177e4 LT |
800 | psf_next = psf->sf_next; |
801 | kfree(psf); | |
802 | } | |
803 | } | |
804 | read_unlock_bh(&idev->lock); | |
805 | } | |
806 | ||
1691c63e WC |
807 | static void mca_get(struct ifmcaddr6 *mc) |
808 | { | |
809 | atomic_inc(&mc->mca_refcnt); | |
810 | } | |
811 | ||
812 | static void ma_put(struct ifmcaddr6 *mc) | |
813 | { | |
814 | if (atomic_dec_and_test(&mc->mca_refcnt)) { | |
815 | in6_dev_put(mc->idev); | |
816 | kfree(mc); | |
817 | } | |
818 | } | |
819 | ||
820 | static struct ifmcaddr6 *mca_alloc(struct inet6_dev *idev, | |
821 | const struct in6_addr *addr) | |
822 | { | |
823 | struct ifmcaddr6 *mc; | |
824 | ||
825 | mc = kzalloc(sizeof(*mc), GFP_ATOMIC); | |
63159f29 | 826 | if (!mc) |
1691c63e WC |
827 | return NULL; |
828 | ||
829 | setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc); | |
830 | ||
831 | mc->mca_addr = *addr; | |
832 | mc->idev = idev; /* reference taken by caller */ | |
833 | mc->mca_users = 1; | |
834 | /* mca_stamp should be updated upon changes */ | |
835 | mc->mca_cstamp = mc->mca_tstamp = jiffies; | |
836 | atomic_set(&mc->mca_refcnt, 1); | |
837 | spin_lock_init(&mc->mca_lock); | |
838 | ||
839 | /* initial mode is (EX, empty) */ | |
840 | mc->mca_sfmode = MCAST_EXCLUDE; | |
841 | mc->mca_sfcount[MCAST_EXCLUDE] = 1; | |
842 | ||
843 | if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) || | |
844 | IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
845 | mc->mca_flags |= MAF_NOREPORT; | |
846 | ||
847 | return mc; | |
848 | } | |
1da177e4 LT |
849 | |
850 | /* | |
851 | * device multicast group inc (add if not found) | |
852 | */ | |
9acd9f3a | 853 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
854 | { |
855 | struct ifmcaddr6 *mc; | |
856 | struct inet6_dev *idev; | |
857 | ||
a9ed4a29 SD |
858 | ASSERT_RTNL(); |
859 | ||
96b52e61 | 860 | /* we need to take a reference on idev */ |
1da177e4 LT |
861 | idev = in6_dev_get(dev); |
862 | ||
63159f29 | 863 | if (!idev) |
1da177e4 LT |
864 | return -EINVAL; |
865 | ||
866 | write_lock_bh(&idev->lock); | |
867 | if (idev->dead) { | |
868 | write_unlock_bh(&idev->lock); | |
869 | in6_dev_put(idev); | |
870 | return -ENODEV; | |
871 | } | |
872 | ||
873 | for (mc = idev->mc_list; mc; mc = mc->next) { | |
874 | if (ipv6_addr_equal(&mc->mca_addr, addr)) { | |
875 | mc->mca_users++; | |
876 | write_unlock_bh(&idev->lock); | |
877 | ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0, | |
878 | NULL, 0); | |
879 | in6_dev_put(idev); | |
880 | return 0; | |
881 | } | |
882 | } | |
883 | ||
1691c63e WC |
884 | mc = mca_alloc(idev, addr); |
885 | if (!mc) { | |
1da177e4 LT |
886 | write_unlock_bh(&idev->lock); |
887 | in6_dev_put(idev); | |
888 | return -ENOMEM; | |
889 | } | |
890 | ||
1da177e4 LT |
891 | mc->next = idev->mc_list; |
892 | idev->mc_list = mc; | |
1691c63e WC |
893 | |
894 | /* Hold this for the code below before we unlock, | |
895 | * it is already exposed via idev->mc_list. | |
896 | */ | |
897 | mca_get(mc); | |
1da177e4 LT |
898 | write_unlock_bh(&idev->lock); |
899 | ||
900 | mld_del_delrec(idev, &mc->mca_addr); | |
901 | igmp6_group_added(mc); | |
902 | ma_put(mc); | |
903 | return 0; | |
904 | } | |
905 | ||
906 | /* | |
907 | * device multicast group del | |
908 | */ | |
9acd9f3a | 909 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
910 | { |
911 | struct ifmcaddr6 *ma, **map; | |
912 | ||
a9ed4a29 SD |
913 | ASSERT_RTNL(); |
914 | ||
1da177e4 | 915 | write_lock_bh(&idev->lock); |
67ba4152 | 916 | for (map = &idev->mc_list; (ma = *map) != NULL; map = &ma->next) { |
1da177e4 LT |
917 | if (ipv6_addr_equal(&ma->mca_addr, addr)) { |
918 | if (--ma->mca_users == 0) { | |
919 | *map = ma->next; | |
920 | write_unlock_bh(&idev->lock); | |
921 | ||
922 | igmp6_group_dropped(ma); | |
923 | ||
924 | ma_put(ma); | |
925 | return 0; | |
926 | } | |
927 | write_unlock_bh(&idev->lock); | |
928 | return 0; | |
929 | } | |
930 | } | |
931 | write_unlock_bh(&idev->lock); | |
932 | ||
933 | return -ENOENT; | |
934 | } | |
935 | ||
9acd9f3a | 936 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 | 937 | { |
96b52e61 | 938 | struct inet6_dev *idev; |
1da177e4 LT |
939 | int err; |
940 | ||
414b6c94 | 941 | ASSERT_RTNL(); |
1da177e4 | 942 | |
96b52e61 ED |
943 | idev = __in6_dev_get(dev); |
944 | if (!idev) | |
945 | err = -ENODEV; | |
946 | else | |
947 | err = __ipv6_dev_mc_dec(idev, addr); | |
1da177e4 LT |
948 | |
949 | return err; | |
950 | } | |
951 | ||
1da177e4 LT |
952 | /* |
953 | * check if the interface/address pair is valid | |
954 | */ | |
a50feda5 ED |
955 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, |
956 | const struct in6_addr *src_addr) | |
1da177e4 LT |
957 | { |
958 | struct inet6_dev *idev; | |
959 | struct ifmcaddr6 *mc; | |
a50feda5 | 960 | bool rv = false; |
1da177e4 | 961 | |
96b52e61 ED |
962 | rcu_read_lock(); |
963 | idev = __in6_dev_get(dev); | |
1da177e4 LT |
964 | if (idev) { |
965 | read_lock_bh(&idev->lock); | |
67ba4152 | 966 | for (mc = idev->mc_list; mc; mc = mc->next) { |
1da177e4 LT |
967 | if (ipv6_addr_equal(&mc->mca_addr, group)) |
968 | break; | |
969 | } | |
970 | if (mc) { | |
971 | if (src_addr && !ipv6_addr_any(src_addr)) { | |
972 | struct ip6_sf_list *psf; | |
973 | ||
974 | spin_lock_bh(&mc->mca_lock); | |
67ba4152 | 975 | for (psf = mc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
976 | if (ipv6_addr_equal(&psf->sf_addr, src_addr)) |
977 | break; | |
978 | } | |
979 | if (psf) | |
980 | rv = psf->sf_count[MCAST_INCLUDE] || | |
981 | psf->sf_count[MCAST_EXCLUDE] != | |
982 | mc->mca_sfcount[MCAST_EXCLUDE]; | |
983 | else | |
67ba4152 | 984 | rv = mc->mca_sfcount[MCAST_EXCLUDE] != 0; |
1da177e4 LT |
985 | spin_unlock_bh(&mc->mca_lock); |
986 | } else | |
a50feda5 | 987 | rv = true; /* don't filter unspecified source */ |
1da177e4 LT |
988 | } |
989 | read_unlock_bh(&idev->lock); | |
1da177e4 | 990 | } |
96b52e61 | 991 | rcu_read_unlock(); |
1da177e4 LT |
992 | return rv; |
993 | } | |
994 | ||
995 | static void mld_gq_start_timer(struct inet6_dev *idev) | |
996 | { | |
63862b5b | 997 | unsigned long tv = prandom_u32() % idev->mc_maxdelay; |
1da177e4 LT |
998 | |
999 | idev->mc_gq_running = 1; | |
1000 | if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2)) | |
1001 | in6_dev_hold(idev); | |
1002 | } | |
1003 | ||
b4af8def DB |
1004 | static void mld_gq_stop_timer(struct inet6_dev *idev) |
1005 | { | |
1006 | idev->mc_gq_running = 0; | |
1007 | if (del_timer(&idev->mc_gq_timer)) | |
1008 | __in6_dev_put(idev); | |
1009 | } | |
1010 | ||
c2cef4e8 | 1011 | static void mld_ifc_start_timer(struct inet6_dev *idev, unsigned long delay) |
1da177e4 | 1012 | { |
63862b5b | 1013 | unsigned long tv = prandom_u32() % delay; |
1da177e4 LT |
1014 | |
1015 | if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2)) | |
1016 | in6_dev_hold(idev); | |
1017 | } | |
1018 | ||
b4af8def DB |
1019 | static void mld_ifc_stop_timer(struct inet6_dev *idev) |
1020 | { | |
1021 | idev->mc_ifc_count = 0; | |
1022 | if (del_timer(&idev->mc_ifc_timer)) | |
1023 | __in6_dev_put(idev); | |
1024 | } | |
1025 | ||
c2cef4e8 | 1026 | static void mld_dad_start_timer(struct inet6_dev *idev, unsigned long delay) |
b173ee48 | 1027 | { |
63862b5b | 1028 | unsigned long tv = prandom_u32() % delay; |
b173ee48 HFS |
1029 | |
1030 | if (!mod_timer(&idev->mc_dad_timer, jiffies+tv+2)) | |
1031 | in6_dev_hold(idev); | |
1032 | } | |
1033 | ||
b4af8def DB |
1034 | static void mld_dad_stop_timer(struct inet6_dev *idev) |
1035 | { | |
1036 | if (del_timer(&idev->mc_dad_timer)) | |
1037 | __in6_dev_put(idev); | |
1038 | } | |
1039 | ||
1da177e4 LT |
1040 | /* |
1041 | * IGMP handling (alias multicast ICMPv6 messages) | |
1042 | */ | |
1043 | ||
1044 | static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) | |
1045 | { | |
1046 | unsigned long delay = resptime; | |
1047 | ||
1048 | /* Do not start timer for these addresses */ | |
1049 | if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) || | |
1050 | IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
1051 | return; | |
1052 | ||
1053 | if (del_timer(&ma->mca_timer)) { | |
1054 | atomic_dec(&ma->mca_refcnt); | |
1055 | delay = ma->mca_timer.expires - jiffies; | |
1056 | } | |
1057 | ||
cc7f7ab7 | 1058 | if (delay >= resptime) |
63862b5b | 1059 | delay = prandom_u32() % resptime; |
cc7f7ab7 | 1060 | |
1da177e4 LT |
1061 | ma->mca_timer.expires = jiffies + delay; |
1062 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
1063 | atomic_inc(&ma->mca_refcnt); | |
1064 | ma->mca_flags |= MAF_TIMER_RUNNING; | |
1065 | } | |
1066 | ||
5ab4a6c8 | 1067 | /* mark EXCLUDE-mode sources */ |
a50feda5 ED |
1068 | static bool mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs, |
1069 | const struct in6_addr *srcs) | |
1da177e4 LT |
1070 | { |
1071 | struct ip6_sf_list *psf; | |
1072 | int i, scount; | |
1073 | ||
1074 | scount = 0; | |
67ba4152 | 1075 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1076 | if (scount == nsrcs) |
1077 | break; | |
67ba4152 | 1078 | for (i = 0; i < nsrcs; i++) { |
5ab4a6c8 | 1079 | /* skip inactive filters */ |
e05c4ad3 | 1080 | if (psf->sf_count[MCAST_INCLUDE] || |
5ab4a6c8 DS |
1081 | pmc->mca_sfcount[MCAST_EXCLUDE] != |
1082 | psf->sf_count[MCAST_EXCLUDE]) | |
ce713ee5 | 1083 | break; |
5ab4a6c8 DS |
1084 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1085 | scount++; | |
1086 | break; | |
1087 | } | |
1088 | } | |
1089 | } | |
1090 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1091 | if (scount == nsrcs) /* all sources excluded */ | |
a50feda5 ED |
1092 | return false; |
1093 | return true; | |
5ab4a6c8 DS |
1094 | } |
1095 | ||
a50feda5 ED |
1096 | static bool mld_marksources(struct ifmcaddr6 *pmc, int nsrcs, |
1097 | const struct in6_addr *srcs) | |
5ab4a6c8 DS |
1098 | { |
1099 | struct ip6_sf_list *psf; | |
1100 | int i, scount; | |
1101 | ||
1102 | if (pmc->mca_sfmode == MCAST_EXCLUDE) | |
1103 | return mld_xmarksources(pmc, nsrcs, srcs); | |
1104 | ||
1105 | /* mark INCLUDE-mode sources */ | |
1106 | ||
1107 | scount = 0; | |
67ba4152 | 1108 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
5ab4a6c8 DS |
1109 | if (scount == nsrcs) |
1110 | break; | |
67ba4152 | 1111 | for (i = 0; i < nsrcs; i++) { |
1da177e4 LT |
1112 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1113 | psf->sf_gsresp = 1; | |
1114 | scount++; | |
1115 | break; | |
1116 | } | |
5ab4a6c8 DS |
1117 | } |
1118 | } | |
1119 | if (!scount) { | |
1120 | pmc->mca_flags &= ~MAF_GSQUERY; | |
a50feda5 | 1121 | return false; |
1da177e4 | 1122 | } |
5ab4a6c8 | 1123 | pmc->mca_flags |= MAF_GSQUERY; |
a50feda5 | 1124 | return true; |
1da177e4 LT |
1125 | } |
1126 | ||
58c0ecfd DB |
1127 | static int mld_force_mld_version(const struct inet6_dev *idev) |
1128 | { | |
1129 | /* Normally, both are 0 here. If enforcement to a particular is | |
1130 | * being used, individual device enforcement will have a lower | |
1131 | * precedence over 'all' device (.../conf/all/force_mld_version). | |
1132 | */ | |
1133 | ||
1134 | if (dev_net(idev->dev)->ipv6.devconf_all->force_mld_version != 0) | |
1135 | return dev_net(idev->dev)->ipv6.devconf_all->force_mld_version; | |
1136 | else | |
1137 | return idev->cnf.force_mld_version; | |
1138 | } | |
1139 | ||
1140 | static bool mld_in_v2_mode_only(const struct inet6_dev *idev) | |
1141 | { | |
1142 | return mld_force_mld_version(idev) == 2; | |
1143 | } | |
1144 | ||
1145 | static bool mld_in_v1_mode_only(const struct inet6_dev *idev) | |
1146 | { | |
1147 | return mld_force_mld_version(idev) == 1; | |
1148 | } | |
1149 | ||
6c567b78 DB |
1150 | static bool mld_in_v1_mode(const struct inet6_dev *idev) |
1151 | { | |
58c0ecfd DB |
1152 | if (mld_in_v2_mode_only(idev)) |
1153 | return false; | |
1154 | if (mld_in_v1_mode_only(idev)) | |
6c567b78 DB |
1155 | return true; |
1156 | if (idev->mc_v1_seen && time_before(jiffies, idev->mc_v1_seen)) | |
1157 | return true; | |
1158 | ||
1159 | return false; | |
1160 | } | |
1161 | ||
89225d1c DB |
1162 | static void mld_set_v1_mode(struct inet6_dev *idev) |
1163 | { | |
1164 | /* RFC3810, relevant sections: | |
1165 | * - 9.1. Robustness Variable | |
1166 | * - 9.2. Query Interval | |
1167 | * - 9.3. Query Response Interval | |
1168 | * - 9.12. Older Version Querier Present Timeout | |
1169 | */ | |
1170 | unsigned long switchback; | |
1171 | ||
1172 | switchback = (idev->mc_qrv * idev->mc_qi) + idev->mc_qri; | |
1173 | ||
1174 | idev->mc_v1_seen = jiffies + switchback; | |
1175 | } | |
1176 | ||
1177 | static void mld_update_qrv(struct inet6_dev *idev, | |
1178 | const struct mld2_query *mlh2) | |
1179 | { | |
1180 | /* RFC3810, relevant sections: | |
1181 | * - 5.1.8. QRV (Querier's Robustness Variable) | |
1182 | * - 9.1. Robustness Variable | |
1183 | */ | |
1184 | ||
1185 | /* The value of the Robustness Variable MUST NOT be zero, | |
1186 | * and SHOULD NOT be one. Catch this here if we ever run | |
1187 | * into such a case in future. | |
1188 | */ | |
2f711939 | 1189 | const int min_qrv = min(MLD_QRV_DEFAULT, sysctl_mld_qrv); |
89225d1c DB |
1190 | WARN_ON(idev->mc_qrv == 0); |
1191 | ||
1192 | if (mlh2->mld2q_qrv > 0) | |
1193 | idev->mc_qrv = mlh2->mld2q_qrv; | |
1194 | ||
2f711939 | 1195 | if (unlikely(idev->mc_qrv < min_qrv)) { |
89225d1c | 1196 | net_warn_ratelimited("IPv6: MLD: clamping QRV from %u to %u!\n", |
2f711939 HFS |
1197 | idev->mc_qrv, min_qrv); |
1198 | idev->mc_qrv = min_qrv; | |
89225d1c DB |
1199 | } |
1200 | } | |
1201 | ||
1202 | static void mld_update_qi(struct inet6_dev *idev, | |
1203 | const struct mld2_query *mlh2) | |
1204 | { | |
1205 | /* RFC3810, relevant sections: | |
1206 | * - 5.1.9. QQIC (Querier's Query Interval Code) | |
1207 | * - 9.2. Query Interval | |
1208 | * - 9.12. Older Version Querier Present Timeout | |
1209 | * (the [Query Interval] in the last Query received) | |
1210 | */ | |
1211 | unsigned long mc_qqi; | |
1212 | ||
1213 | if (mlh2->mld2q_qqic < 128) { | |
1214 | mc_qqi = mlh2->mld2q_qqic; | |
1215 | } else { | |
1216 | unsigned long mc_man, mc_exp; | |
1217 | ||
1218 | mc_exp = MLDV2_QQIC_EXP(mlh2->mld2q_qqic); | |
1219 | mc_man = MLDV2_QQIC_MAN(mlh2->mld2q_qqic); | |
1220 | ||
1221 | mc_qqi = (mc_man | 0x10) << (mc_exp + 3); | |
1222 | } | |
1223 | ||
1224 | idev->mc_qi = mc_qqi * HZ; | |
1225 | } | |
1226 | ||
1227 | static void mld_update_qri(struct inet6_dev *idev, | |
1228 | const struct mld2_query *mlh2) | |
1229 | { | |
1230 | /* RFC3810, relevant sections: | |
1231 | * - 5.1.3. Maximum Response Code | |
1232 | * - 9.3. Query Response Interval | |
1233 | */ | |
e3f5b170 | 1234 | idev->mc_qri = msecs_to_jiffies(mldv2_mrc(mlh2)); |
89225d1c DB |
1235 | } |
1236 | ||
2b7c121f | 1237 | static int mld_process_v1(struct inet6_dev *idev, struct mld_msg *mld, |
35f7aa53 | 1238 | unsigned long *max_delay, bool v1_query) |
2b7c121f DB |
1239 | { |
1240 | unsigned long mldv1_md; | |
1241 | ||
1242 | /* Ignore v1 queries */ | |
1243 | if (mld_in_v2_mode_only(idev)) | |
1244 | return -EINVAL; | |
1245 | ||
2b7c121f | 1246 | mldv1_md = ntohs(mld->mld_maxdelay); |
35f7aa53 DB |
1247 | |
1248 | /* When in MLDv1 fallback and a MLDv2 router start-up being | |
1249 | * unaware of current MLDv1 operation, the MRC == MRD mapping | |
1250 | * only works when the exponential algorithm is not being | |
1251 | * used (as MLDv1 is unaware of such things). | |
1252 | * | |
1253 | * According to the RFC author, the MLDv2 implementations | |
1254 | * he's aware of all use a MRC < 32768 on start up queries. | |
1255 | * | |
1256 | * Thus, should we *ever* encounter something else larger | |
1257 | * than that, just assume the maximum possible within our | |
1258 | * reach. | |
1259 | */ | |
1260 | if (!v1_query) | |
1261 | mldv1_md = min(mldv1_md, MLDV1_MRD_MAX_COMPAT); | |
1262 | ||
2b7c121f DB |
1263 | *max_delay = max(msecs_to_jiffies(mldv1_md), 1UL); |
1264 | ||
35f7aa53 DB |
1265 | /* MLDv1 router present: we need to go into v1 mode *only* |
1266 | * when an MLDv1 query is received as per section 9.12. of | |
1267 | * RFC3810! And we know from RFC2710 section 3.7 that MLDv1 | |
1268 | * queries MUST be of exactly 24 octets. | |
1269 | */ | |
1270 | if (v1_query) | |
1271 | mld_set_v1_mode(idev); | |
2b7c121f DB |
1272 | |
1273 | /* cancel MLDv2 report timer */ | |
b4af8def | 1274 | mld_gq_stop_timer(idev); |
2b7c121f | 1275 | /* cancel the interface change timer */ |
b4af8def | 1276 | mld_ifc_stop_timer(idev); |
2b7c121f DB |
1277 | /* clear deleted report items */ |
1278 | mld_clear_delrec(idev); | |
1279 | ||
1280 | return 0; | |
1281 | } | |
1282 | ||
1283 | static int mld_process_v2(struct inet6_dev *idev, struct mld2_query *mld, | |
1284 | unsigned long *max_delay) | |
1285 | { | |
2b7c121f DB |
1286 | *max_delay = max(msecs_to_jiffies(mldv2_mrc(mld)), 1UL); |
1287 | ||
1288 | mld_update_qrv(idev, mld); | |
1289 | mld_update_qi(idev, mld); | |
1290 | mld_update_qri(idev, mld); | |
1291 | ||
1292 | idev->mc_maxdelay = *max_delay; | |
1293 | ||
1294 | return 0; | |
1295 | } | |
1296 | ||
96b52e61 | 1297 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1298 | int igmp6_event_query(struct sk_buff *skb) |
1299 | { | |
97300b5f | 1300 | struct mld2_query *mlh2 = NULL; |
1da177e4 | 1301 | struct ifmcaddr6 *ma; |
b71d1d42 | 1302 | const struct in6_addr *group; |
1da177e4 LT |
1303 | unsigned long max_delay; |
1304 | struct inet6_dev *idev; | |
6e7cb837 | 1305 | struct mld_msg *mld; |
1da177e4 LT |
1306 | int group_type; |
1307 | int mark = 0; | |
2b7c121f | 1308 | int len, err; |
1da177e4 LT |
1309 | |
1310 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) | |
1311 | return -EINVAL; | |
1312 | ||
1313 | /* compute payload length excluding extension headers */ | |
0660e03f | 1314 | len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); |
cfe1fc77 | 1315 | len -= skb_network_header_len(skb); |
1da177e4 | 1316 | |
e940f5d6 HL |
1317 | /* RFC3810 6.2 |
1318 | * Upon reception of an MLD message that contains a Query, the node | |
1319 | * checks if the source address of the message is a valid link-local | |
1320 | * address, if the Hop Limit is set to 1, and if the Router Alert | |
1321 | * option is present in the Hop-By-Hop Options header of the IPv6 | |
1322 | * packet. If any of these checks fails, the packet is dropped. | |
1323 | */ | |
1324 | if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL) || | |
1325 | ipv6_hdr(skb)->hop_limit != 1 || | |
1326 | !(IP6CB(skb)->flags & IP6SKB_ROUTERALERT) || | |
1327 | IP6CB(skb)->ra != htons(IPV6_OPT_ROUTERALERT_MLD)) | |
1da177e4 LT |
1328 | return -EINVAL; |
1329 | ||
96b52e61 | 1330 | idev = __in6_dev_get(skb->dev); |
63159f29 | 1331 | if (!idev) |
1da177e4 LT |
1332 | return 0; |
1333 | ||
6e7cb837 YH |
1334 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1335 | group = &mld->mld_mca; | |
1da177e4 LT |
1336 | group_type = ipv6_addr_type(group); |
1337 | ||
1338 | if (group_type != IPV6_ADDR_ANY && | |
96b52e61 | 1339 | !(group_type&IPV6_ADDR_MULTICAST)) |
1da177e4 | 1340 | return -EINVAL; |
1da177e4 | 1341 | |
35f7aa53 DB |
1342 | if (len < MLD_V1_QUERY_LEN) { |
1343 | return -EINVAL; | |
1344 | } else if (len == MLD_V1_QUERY_LEN || mld_in_v1_mode(idev)) { | |
1345 | err = mld_process_v1(idev, mld, &max_delay, | |
1346 | len == MLD_V1_QUERY_LEN); | |
2b7c121f DB |
1347 | if (err < 0) |
1348 | return err; | |
9fd07841 | 1349 | } else if (len >= MLD_V2_QUERY_LEN_MIN) { |
1ab1457c | 1350 | int srcs_offset = sizeof(struct mld2_query) - |
97300b5f | 1351 | sizeof(struct icmp6hdr); |
89225d1c | 1352 | |
96b52e61 | 1353 | if (!pskb_may_pull(skb, srcs_offset)) |
97300b5f | 1354 | return -EINVAL; |
96b52e61 | 1355 | |
9c70220b | 1356 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
84698963 | 1357 | |
2b7c121f DB |
1358 | err = mld_process_v2(idev, mlh2, &max_delay); |
1359 | if (err < 0) | |
1360 | return err; | |
89225d1c | 1361 | |
1da177e4 | 1362 | if (group_type == IPV6_ADDR_ANY) { /* general query */ |
96b52e61 | 1363 | if (mlh2->mld2q_nsrcs) |
1da177e4 | 1364 | return -EINVAL; /* no sources allowed */ |
96b52e61 | 1365 | |
1da177e4 | 1366 | mld_gq_start_timer(idev); |
1da177e4 LT |
1367 | return 0; |
1368 | } | |
1369 | /* mark sources to include, if group & source-specific */ | |
6e7cb837 | 1370 | if (mlh2->mld2q_nsrcs != 0) { |
1ab1457c | 1371 | if (!pskb_may_pull(skb, srcs_offset + |
96b52e61 | 1372 | ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr))) |
97300b5f | 1373 | return -EINVAL; |
96b52e61 | 1374 | |
9c70220b | 1375 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
97300b5f YZ |
1376 | mark = 1; |
1377 | } | |
35f7aa53 | 1378 | } else { |
1da177e4 | 1379 | return -EINVAL; |
35f7aa53 | 1380 | } |
1da177e4 LT |
1381 | |
1382 | read_lock_bh(&idev->lock); | |
1383 | if (group_type == IPV6_ADDR_ANY) { | |
67ba4152 | 1384 | for (ma = idev->mc_list; ma; ma = ma->next) { |
1da177e4 LT |
1385 | spin_lock_bh(&ma->mca_lock); |
1386 | igmp6_group_queried(ma, max_delay); | |
1387 | spin_unlock_bh(&ma->mca_lock); | |
1388 | } | |
1389 | } else { | |
67ba4152 | 1390 | for (ma = idev->mc_list; ma; ma = ma->next) { |
7add2a43 | 1391 | if (!ipv6_addr_equal(group, &ma->mca_addr)) |
1da177e4 LT |
1392 | continue; |
1393 | spin_lock_bh(&ma->mca_lock); | |
1394 | if (ma->mca_flags & MAF_TIMER_RUNNING) { | |
1395 | /* gsquery <- gsquery && mark */ | |
1396 | if (!mark) | |
1397 | ma->mca_flags &= ~MAF_GSQUERY; | |
1398 | } else { | |
1399 | /* gsquery <- mark */ | |
1400 | if (mark) | |
1401 | ma->mca_flags |= MAF_GSQUERY; | |
1402 | else | |
1403 | ma->mca_flags &= ~MAF_GSQUERY; | |
1404 | } | |
5ab4a6c8 | 1405 | if (!(ma->mca_flags & MAF_GSQUERY) || |
6e7cb837 | 1406 | mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs)) |
5ab4a6c8 | 1407 | igmp6_group_queried(ma, max_delay); |
1da177e4 | 1408 | spin_unlock_bh(&ma->mca_lock); |
7add2a43 | 1409 | break; |
1da177e4 LT |
1410 | } |
1411 | } | |
1412 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1413 | |
1414 | return 0; | |
1415 | } | |
1416 | ||
96b52e61 | 1417 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1418 | int igmp6_event_report(struct sk_buff *skb) |
1419 | { | |
1420 | struct ifmcaddr6 *ma; | |
1da177e4 | 1421 | struct inet6_dev *idev; |
6e7cb837 | 1422 | struct mld_msg *mld; |
1da177e4 LT |
1423 | int addr_type; |
1424 | ||
1425 | /* Our own report looped back. Ignore it. */ | |
1426 | if (skb->pkt_type == PACKET_LOOPBACK) | |
1427 | return 0; | |
1428 | ||
24c69275 DS |
1429 | /* send our report if the MC router may not have heard this report */ |
1430 | if (skb->pkt_type != PACKET_MULTICAST && | |
1431 | skb->pkt_type != PACKET_BROADCAST) | |
1432 | return 0; | |
1433 | ||
6e7cb837 | 1434 | if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr))) |
1da177e4 LT |
1435 | return -EINVAL; |
1436 | ||
6e7cb837 | 1437 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1da177e4 LT |
1438 | |
1439 | /* Drop reports with not link local source */ | |
0660e03f | 1440 | addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr); |
1ab1457c | 1441 | if (addr_type != IPV6_ADDR_ANY && |
1da177e4 LT |
1442 | !(addr_type&IPV6_ADDR_LINKLOCAL)) |
1443 | return -EINVAL; | |
1444 | ||
96b52e61 | 1445 | idev = __in6_dev_get(skb->dev); |
63159f29 | 1446 | if (!idev) |
1da177e4 LT |
1447 | return -ENODEV; |
1448 | ||
1449 | /* | |
1450 | * Cancel the timer for this group | |
1451 | */ | |
1452 | ||
1453 | read_lock_bh(&idev->lock); | |
67ba4152 | 1454 | for (ma = idev->mc_list; ma; ma = ma->next) { |
6e7cb837 | 1455 | if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) { |
1da177e4 LT |
1456 | spin_lock(&ma->mca_lock); |
1457 | if (del_timer(&ma->mca_timer)) | |
1458 | atomic_dec(&ma->mca_refcnt); | |
1459 | ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING); | |
1460 | spin_unlock(&ma->mca_lock); | |
1461 | break; | |
1462 | } | |
1463 | } | |
1464 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1465 | return 0; |
1466 | } | |
1467 | ||
a50feda5 ED |
1468 | static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type, |
1469 | int gdeleted, int sdeleted) | |
1da177e4 LT |
1470 | { |
1471 | switch (type) { | |
1472 | case MLD2_MODE_IS_INCLUDE: | |
1473 | case MLD2_MODE_IS_EXCLUDE: | |
1474 | if (gdeleted || sdeleted) | |
a50feda5 | 1475 | return false; |
5ab4a6c8 DS |
1476 | if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) { |
1477 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
a50feda5 | 1478 | return true; |
5ab4a6c8 DS |
1479 | /* don't include if this source is excluded |
1480 | * in all filters | |
1481 | */ | |
1482 | if (psf->sf_count[MCAST_INCLUDE]) | |
7add2a43 | 1483 | return type == MLD2_MODE_IS_INCLUDE; |
5ab4a6c8 DS |
1484 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1485 | psf->sf_count[MCAST_EXCLUDE]; | |
1486 | } | |
a50feda5 | 1487 | return false; |
1da177e4 LT |
1488 | case MLD2_CHANGE_TO_INCLUDE: |
1489 | if (gdeleted || sdeleted) | |
a50feda5 | 1490 | return false; |
1da177e4 LT |
1491 | return psf->sf_count[MCAST_INCLUDE] != 0; |
1492 | case MLD2_CHANGE_TO_EXCLUDE: | |
1493 | if (gdeleted || sdeleted) | |
a50feda5 | 1494 | return false; |
1da177e4 LT |
1495 | if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 || |
1496 | psf->sf_count[MCAST_INCLUDE]) | |
a50feda5 | 1497 | return false; |
1da177e4 LT |
1498 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1499 | psf->sf_count[MCAST_EXCLUDE]; | |
1500 | case MLD2_ALLOW_NEW_SOURCES: | |
1501 | if (gdeleted || !psf->sf_crcount) | |
a50feda5 | 1502 | return false; |
1da177e4 LT |
1503 | return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted; |
1504 | case MLD2_BLOCK_OLD_SOURCES: | |
1505 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1506 | return gdeleted || (psf->sf_crcount && sdeleted); | |
1507 | return psf->sf_crcount && !gdeleted && !sdeleted; | |
1508 | } | |
a50feda5 | 1509 | return false; |
1da177e4 LT |
1510 | } |
1511 | ||
1512 | static int | |
1513 | mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted) | |
1514 | { | |
1515 | struct ip6_sf_list *psf; | |
1516 | int scount = 0; | |
1517 | ||
67ba4152 | 1518 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1519 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) |
1520 | continue; | |
1521 | scount++; | |
1522 | } | |
1523 | return scount; | |
1524 | } | |
1525 | ||
2576f17d YH |
1526 | static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb, |
1527 | struct net_device *dev, | |
1528 | const struct in6_addr *saddr, | |
1529 | const struct in6_addr *daddr, | |
1530 | int proto, int len) | |
1531 | { | |
1532 | struct ipv6hdr *hdr; | |
1533 | ||
1534 | skb->protocol = htons(ETH_P_IPV6); | |
1535 | skb->dev = dev; | |
1536 | ||
1537 | skb_reset_network_header(skb); | |
1538 | skb_put(skb, sizeof(struct ipv6hdr)); | |
1539 | hdr = ipv6_hdr(skb); | |
1540 | ||
1541 | ip6_flow_hdr(hdr, 0, 0); | |
1542 | ||
1543 | hdr->payload_len = htons(len); | |
1544 | hdr->nexthdr = proto; | |
1545 | hdr->hop_limit = inet6_sk(sk)->hop_limit; | |
1546 | ||
1547 | hdr->saddr = *saddr; | |
1548 | hdr->daddr = *daddr; | |
1549 | } | |
1550 | ||
4c672e4b | 1551 | static struct sk_buff *mld_newpack(struct inet6_dev *idev, unsigned int mtu) |
1da177e4 | 1552 | { |
8965779d | 1553 | struct net_device *dev = idev->dev; |
c346dca1 | 1554 | struct net *net = dev_net(dev); |
b8ad0cbc | 1555 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 LT |
1556 | struct sk_buff *skb; |
1557 | struct mld2_report *pmr; | |
1558 | struct in6_addr addr_buf; | |
d7aabf22 | 1559 | const struct in6_addr *saddr; |
a7ae1992 HX |
1560 | int hlen = LL_RESERVED_SPACE(dev); |
1561 | int tlen = dev->needed_tailroom; | |
4c672e4b | 1562 | unsigned int size = mtu + hlen + tlen; |
1da177e4 LT |
1563 | int err; |
1564 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1565 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1566 | IPV6_TLV_PADN, 0 }; | |
1567 | ||
1568 | /* we assume size > sizeof(ra) here */ | |
72e09ad1 ED |
1569 | /* limit our allocations to order-0 page */ |
1570 | size = min_t(int, size, SKB_MAX_ORDER(0, 0)); | |
1571 | skb = sock_alloc_send_skb(sk, size, 1, &err); | |
1da177e4 | 1572 | |
cfcabdcc | 1573 | if (!skb) |
1da177e4 LT |
1574 | return NULL; |
1575 | ||
9d4a0314 | 1576 | skb->priority = TC_PRIO_CONTROL; |
4c672e4b DB |
1577 | skb->reserved_tailroom = skb_end_offset(skb) - |
1578 | min(mtu, skb_end_offset(skb)); | |
a7ae1992 | 1579 | skb_reserve(skb, hlen); |
1da177e4 | 1580 | |
8965779d | 1581 | if (__ipv6_get_lladdr(idev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1582 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1583 | * use unspecified address as the source address |
1da177e4 LT |
1584 | * when a valid link-local address is not available. |
1585 | */ | |
d7aabf22 YH |
1586 | saddr = &in6addr_any; |
1587 | } else | |
1588 | saddr = &addr_buf; | |
1da177e4 | 1589 | |
2576f17d | 1590 | ip6_mc_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0); |
1da177e4 LT |
1591 | |
1592 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1593 | ||
27a884dc | 1594 | skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data); |
d10ba34b ACM |
1595 | skb_put(skb, sizeof(*pmr)); |
1596 | pmr = (struct mld2_report *)skb_transport_header(skb); | |
6e7cb837 YH |
1597 | pmr->mld2r_type = ICMPV6_MLD2_REPORT; |
1598 | pmr->mld2r_resv1 = 0; | |
1599 | pmr->mld2r_cksum = 0; | |
1600 | pmr->mld2r_resv2 = 0; | |
1601 | pmr->mld2r_ngrec = 0; | |
1da177e4 LT |
1602 | return skb; |
1603 | } | |
1604 | ||
1605 | static void mld_sendpack(struct sk_buff *skb) | |
1606 | { | |
0660e03f | 1607 | struct ipv6hdr *pip6 = ipv6_hdr(skb); |
9c70220b ACM |
1608 | struct mld2_report *pmr = |
1609 | (struct mld2_report *)skb_transport_header(skb); | |
1da177e4 | 1610 | int payload_len, mldlen; |
96b52e61 | 1611 | struct inet6_dev *idev; |
c346dca1 | 1612 | struct net *net = dev_net(skb->dev); |
1da177e4 | 1613 | int err; |
4c9483b2 | 1614 | struct flowi6 fl6; |
adf30907 | 1615 | struct dst_entry *dst; |
1da177e4 | 1616 | |
96b52e61 ED |
1617 | rcu_read_lock(); |
1618 | idev = __in6_dev_get(skb->dev); | |
edf391ff NH |
1619 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len); |
1620 | ||
29a3cad5 SH |
1621 | payload_len = (skb_tail_pointer(skb) - skb_network_header(skb)) - |
1622 | sizeof(*pip6); | |
1623 | mldlen = skb_tail_pointer(skb) - skb_transport_header(skb); | |
1da177e4 LT |
1624 | pip6->payload_len = htons(payload_len); |
1625 | ||
6e7cb837 YH |
1626 | pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen, |
1627 | IPPROTO_ICMPV6, | |
1628 | csum_partial(skb_transport_header(skb), | |
1629 | mldlen, 0)); | |
41927178 | 1630 | |
4c9483b2 | 1631 | icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT, |
41927178 YH |
1632 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1633 | skb->dev->ifindex); | |
12fd84f4 | 1634 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
41927178 | 1635 | |
452edd59 DM |
1636 | err = 0; |
1637 | if (IS_ERR(dst)) { | |
1638 | err = PTR_ERR(dst); | |
1639 | dst = NULL; | |
1640 | } | |
adf30907 | 1641 | skb_dst_set(skb, dst); |
41927178 YH |
1642 | if (err) |
1643 | goto err_out; | |
1644 | ||
edf391ff NH |
1645 | payload_len = skb->len; |
1646 | ||
7026b1dd DM |
1647 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, |
1648 | net->ipv6.igmp_sk, skb, NULL, skb->dev, | |
5a70649e | 1649 | dst_output); |
41927178 | 1650 | out: |
1da177e4 | 1651 | if (!err) { |
43a43b60 HFS |
1652 | ICMP6MSGOUT_INC_STATS(net, idev, ICMPV6_MLD2_REPORT); |
1653 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); | |
1654 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, payload_len); | |
1655 | } else { | |
1656 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); | |
1657 | } | |
1da177e4 | 1658 | |
96b52e61 | 1659 | rcu_read_unlock(); |
41927178 YH |
1660 | return; |
1661 | ||
1662 | err_out: | |
1663 | kfree_skb(skb); | |
1664 | goto out; | |
1da177e4 LT |
1665 | } |
1666 | ||
1667 | static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel) | |
1668 | { | |
fab10fe3 | 1669 | return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel); |
1da177e4 LT |
1670 | } |
1671 | ||
1672 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1673 | int type, struct mld2_grec **ppgr) | |
1674 | { | |
1675 | struct net_device *dev = pmc->idev->dev; | |
1676 | struct mld2_report *pmr; | |
1677 | struct mld2_grec *pgr; | |
1678 | ||
1679 | if (!skb) | |
8965779d | 1680 | skb = mld_newpack(pmc->idev, dev->mtu); |
1da177e4 LT |
1681 | if (!skb) |
1682 | return NULL; | |
1683 | pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec)); | |
1684 | pgr->grec_type = type; | |
1685 | pgr->grec_auxwords = 0; | |
1686 | pgr->grec_nsrcs = 0; | |
1687 | pgr->grec_mca = pmc->mca_addr; /* structure copy */ | |
9c70220b | 1688 | pmr = (struct mld2_report *)skb_transport_header(skb); |
6e7cb837 | 1689 | pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1); |
1da177e4 LT |
1690 | *ppgr = pgr; |
1691 | return skb; | |
1692 | } | |
1693 | ||
4c672e4b | 1694 | #define AVAILABLE(skb) ((skb) ? skb_availroom(skb) : 0) |
1da177e4 LT |
1695 | |
1696 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
6a7cc418 | 1697 | int type, int gdeleted, int sdeleted, int crsend) |
1da177e4 | 1698 | { |
8965779d AW |
1699 | struct inet6_dev *idev = pmc->idev; |
1700 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
1701 | struct mld2_report *pmr; |
1702 | struct mld2_grec *pgr = NULL; | |
1703 | struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list; | |
5ab4a6c8 | 1704 | int scount, stotal, first, isquery, truncate; |
1da177e4 LT |
1705 | |
1706 | if (pmc->mca_flags & MAF_NOREPORT) | |
1707 | return skb; | |
1708 | ||
1709 | isquery = type == MLD2_MODE_IS_INCLUDE || | |
1710 | type == MLD2_MODE_IS_EXCLUDE; | |
1711 | truncate = type == MLD2_MODE_IS_EXCLUDE || | |
1712 | type == MLD2_CHANGE_TO_EXCLUDE; | |
1713 | ||
5ab4a6c8 DS |
1714 | stotal = scount = 0; |
1715 | ||
1da177e4 LT |
1716 | psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources; |
1717 | ||
5ab4a6c8 DS |
1718 | if (!*psf_list) |
1719 | goto empty_source; | |
1720 | ||
9c70220b | 1721 | pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL; |
1da177e4 LT |
1722 | |
1723 | /* EX and TO_EX get a fresh packet, if needed */ | |
1724 | if (truncate) { | |
6e7cb837 | 1725 | if (pmr && pmr->mld2r_ngrec && |
1da177e4 LT |
1726 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { |
1727 | if (skb) | |
1728 | mld_sendpack(skb); | |
8965779d | 1729 | skb = mld_newpack(idev, dev->mtu); |
1da177e4 LT |
1730 | } |
1731 | } | |
1732 | first = 1; | |
1da177e4 | 1733 | psf_prev = NULL; |
67ba4152 | 1734 | for (psf = *psf_list; psf; psf = psf_next) { |
1da177e4 LT |
1735 | struct in6_addr *psrc; |
1736 | ||
1737 | psf_next = psf->sf_next; | |
1738 | ||
1739 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) { | |
1740 | psf_prev = psf; | |
1741 | continue; | |
1742 | } | |
1743 | ||
1744 | /* clear marks on query responses */ | |
1745 | if (isquery) | |
1746 | psf->sf_gsresp = 0; | |
1747 | ||
1748 | if (AVAILABLE(skb) < sizeof(*psrc) + | |
1749 | first*sizeof(struct mld2_grec)) { | |
1750 | if (truncate && !first) | |
1751 | break; /* truncate these */ | |
1752 | if (pgr) | |
1753 | pgr->grec_nsrcs = htons(scount); | |
1754 | if (skb) | |
1755 | mld_sendpack(skb); | |
8965779d | 1756 | skb = mld_newpack(idev, dev->mtu); |
1da177e4 LT |
1757 | first = 1; |
1758 | scount = 0; | |
1759 | } | |
1760 | if (first) { | |
1761 | skb = add_grhead(skb, pmc, type, &pgr); | |
1762 | first = 0; | |
1763 | } | |
cc63f70b AD |
1764 | if (!skb) |
1765 | return NULL; | |
1da177e4 LT |
1766 | psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc)); |
1767 | *psrc = psf->sf_addr; | |
5ab4a6c8 | 1768 | scount++; stotal++; |
1da177e4 LT |
1769 | if ((type == MLD2_ALLOW_NEW_SOURCES || |
1770 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) { | |
1771 | psf->sf_crcount--; | |
1772 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { | |
1773 | if (psf_prev) | |
1774 | psf_prev->sf_next = psf->sf_next; | |
1775 | else | |
1776 | *psf_list = psf->sf_next; | |
1777 | kfree(psf); | |
1778 | continue; | |
1779 | } | |
1780 | } | |
1781 | psf_prev = psf; | |
1782 | } | |
5ab4a6c8 DS |
1783 | |
1784 | empty_source: | |
1785 | if (!stotal) { | |
1786 | if (type == MLD2_ALLOW_NEW_SOURCES || | |
1787 | type == MLD2_BLOCK_OLD_SOURCES) | |
1788 | return skb; | |
6a7cc418 | 1789 | if (pmc->mca_crcount || isquery || crsend) { |
5ab4a6c8 DS |
1790 | /* make sure we have room for group header */ |
1791 | if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) { | |
1792 | mld_sendpack(skb); | |
1793 | skb = NULL; /* add_grhead will get a new one */ | |
1794 | } | |
1795 | skb = add_grhead(skb, pmc, type, &pgr); | |
1796 | } | |
1797 | } | |
1da177e4 LT |
1798 | if (pgr) |
1799 | pgr->grec_nsrcs = htons(scount); | |
1800 | ||
1801 | if (isquery) | |
1802 | pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */ | |
1803 | return skb; | |
1804 | } | |
1805 | ||
1806 | static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc) | |
1807 | { | |
1808 | struct sk_buff *skb = NULL; | |
1809 | int type; | |
1810 | ||
8965779d | 1811 | read_lock_bh(&idev->lock); |
1da177e4 | 1812 | if (!pmc) { |
67ba4152 | 1813 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
1814 | if (pmc->mca_flags & MAF_NOREPORT) |
1815 | continue; | |
1816 | spin_lock_bh(&pmc->mca_lock); | |
1817 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1818 | type = MLD2_MODE_IS_EXCLUDE; | |
1819 | else | |
1820 | type = MLD2_MODE_IS_INCLUDE; | |
6a7cc418 | 1821 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1da177e4 LT |
1822 | spin_unlock_bh(&pmc->mca_lock); |
1823 | } | |
1da177e4 LT |
1824 | } else { |
1825 | spin_lock_bh(&pmc->mca_lock); | |
1826 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1827 | type = MLD2_MODE_IS_EXCLUDE; | |
1828 | else | |
1829 | type = MLD2_MODE_IS_INCLUDE; | |
6a7cc418 | 1830 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1da177e4 LT |
1831 | spin_unlock_bh(&pmc->mca_lock); |
1832 | } | |
8965779d | 1833 | read_unlock_bh(&idev->lock); |
1da177e4 LT |
1834 | if (skb) |
1835 | mld_sendpack(skb); | |
1836 | } | |
1837 | ||
1838 | /* | |
1839 | * remove zero-count source records from a source filter list | |
1840 | */ | |
1841 | static void mld_clear_zeros(struct ip6_sf_list **ppsf) | |
1842 | { | |
1843 | struct ip6_sf_list *psf_prev, *psf_next, *psf; | |
1844 | ||
1845 | psf_prev = NULL; | |
67ba4152 | 1846 | for (psf = *ppsf; psf; psf = psf_next) { |
1da177e4 LT |
1847 | psf_next = psf->sf_next; |
1848 | if (psf->sf_crcount == 0) { | |
1849 | if (psf_prev) | |
1850 | psf_prev->sf_next = psf->sf_next; | |
1851 | else | |
1852 | *ppsf = psf->sf_next; | |
1853 | kfree(psf); | |
1854 | } else | |
1855 | psf_prev = psf; | |
1856 | } | |
1857 | } | |
1858 | ||
1859 | static void mld_send_cr(struct inet6_dev *idev) | |
1860 | { | |
1861 | struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next; | |
1862 | struct sk_buff *skb = NULL; | |
1863 | int type, dtype; | |
1864 | ||
1865 | read_lock_bh(&idev->lock); | |
6457d26b | 1866 | spin_lock(&idev->mc_lock); |
1da177e4 LT |
1867 | |
1868 | /* deleted MCA's */ | |
1869 | pmc_prev = NULL; | |
67ba4152 | 1870 | for (pmc = idev->mc_tomb; pmc; pmc = pmc_next) { |
1da177e4 LT |
1871 | pmc_next = pmc->next; |
1872 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
1873 | type = MLD2_BLOCK_OLD_SOURCES; | |
1874 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
6a7cc418 FL |
1875 | skb = add_grec(skb, pmc, type, 1, 0, 0); |
1876 | skb = add_grec(skb, pmc, dtype, 1, 1, 0); | |
1da177e4 LT |
1877 | } |
1878 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1879 | if (pmc->mca_sfmode == MCAST_EXCLUDE) { |
1880 | type = MLD2_CHANGE_TO_INCLUDE; | |
6a7cc418 | 1881 | skb = add_grec(skb, pmc, type, 1, 0, 0); |
1da177e4 | 1882 | } |
5ab4a6c8 | 1883 | pmc->mca_crcount--; |
1da177e4 LT |
1884 | if (pmc->mca_crcount == 0) { |
1885 | mld_clear_zeros(&pmc->mca_tomb); | |
1886 | mld_clear_zeros(&pmc->mca_sources); | |
1887 | } | |
1888 | } | |
1889 | if (pmc->mca_crcount == 0 && !pmc->mca_tomb && | |
1890 | !pmc->mca_sources) { | |
1891 | if (pmc_prev) | |
1892 | pmc_prev->next = pmc_next; | |
1893 | else | |
1894 | idev->mc_tomb = pmc_next; | |
1895 | in6_dev_put(pmc->idev); | |
1896 | kfree(pmc); | |
1897 | } else | |
1898 | pmc_prev = pmc; | |
1899 | } | |
6457d26b | 1900 | spin_unlock(&idev->mc_lock); |
1da177e4 LT |
1901 | |
1902 | /* change recs */ | |
67ba4152 | 1903 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
1904 | spin_lock_bh(&pmc->mca_lock); |
1905 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1906 | type = MLD2_BLOCK_OLD_SOURCES; | |
1907 | dtype = MLD2_ALLOW_NEW_SOURCES; | |
1908 | } else { | |
1909 | type = MLD2_ALLOW_NEW_SOURCES; | |
1910 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1911 | } | |
6a7cc418 FL |
1912 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1913 | skb = add_grec(skb, pmc, dtype, 0, 1, 0); /* deleted sources */ | |
1da177e4 LT |
1914 | |
1915 | /* filter mode changes */ | |
1916 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1917 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
1918 | type = MLD2_CHANGE_TO_EXCLUDE; | |
1919 | else | |
1920 | type = MLD2_CHANGE_TO_INCLUDE; | |
6a7cc418 | 1921 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
5ab4a6c8 | 1922 | pmc->mca_crcount--; |
1da177e4 LT |
1923 | } |
1924 | spin_unlock_bh(&pmc->mca_lock); | |
1925 | } | |
1926 | read_unlock_bh(&idev->lock); | |
1927 | if (!skb) | |
1928 | return; | |
1929 | (void) mld_sendpack(skb); | |
1930 | } | |
1931 | ||
1932 | static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type) | |
1933 | { | |
c346dca1 | 1934 | struct net *net = dev_net(dev); |
b8ad0cbc | 1935 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 | 1936 | struct inet6_dev *idev; |
1ab1457c | 1937 | struct sk_buff *skb; |
6e7cb837 | 1938 | struct mld_msg *hdr; |
d7aabf22 | 1939 | const struct in6_addr *snd_addr, *saddr; |
1da177e4 | 1940 | struct in6_addr addr_buf; |
a7ae1992 HX |
1941 | int hlen = LL_RESERVED_SPACE(dev); |
1942 | int tlen = dev->needed_tailroom; | |
1da177e4 LT |
1943 | int err, len, payload_len, full_len; |
1944 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1945 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1946 | IPV6_TLV_PADN, 0 }; | |
4c9483b2 | 1947 | struct flowi6 fl6; |
adf30907 | 1948 | struct dst_entry *dst; |
1da177e4 | 1949 | |
f3ee4010 YH |
1950 | if (type == ICMPV6_MGM_REDUCTION) |
1951 | snd_addr = &in6addr_linklocal_allrouters; | |
1952 | else | |
1953 | snd_addr = addr; | |
1da177e4 LT |
1954 | |
1955 | len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); | |
1956 | payload_len = len + sizeof(ra); | |
1957 | full_len = sizeof(struct ipv6hdr) + payload_len; | |
1958 | ||
edf391ff NH |
1959 | rcu_read_lock(); |
1960 | IP6_UPD_PO_STATS(net, __in6_dev_get(dev), | |
1961 | IPSTATS_MIB_OUT, full_len); | |
1962 | rcu_read_unlock(); | |
1963 | ||
a7ae1992 | 1964 | skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err); |
1da177e4 | 1965 | |
63159f29 | 1966 | if (!skb) { |
a11d206d | 1967 | rcu_read_lock(); |
3bd653c8 | 1968 | IP6_INC_STATS(net, __in6_dev_get(dev), |
a11d206d YH |
1969 | IPSTATS_MIB_OUTDISCARDS); |
1970 | rcu_read_unlock(); | |
1da177e4 LT |
1971 | return; |
1972 | } | |
9d4a0314 | 1973 | skb->priority = TC_PRIO_CONTROL; |
a7ae1992 | 1974 | skb_reserve(skb, hlen); |
1da177e4 | 1975 | |
95c385b4 | 1976 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1977 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1978 | * use unspecified address as the source address |
1da177e4 LT |
1979 | * when a valid link-local address is not available. |
1980 | */ | |
d7aabf22 YH |
1981 | saddr = &in6addr_any; |
1982 | } else | |
1983 | saddr = &addr_buf; | |
1da177e4 | 1984 | |
2576f17d | 1985 | ip6_mc_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len); |
1da177e4 LT |
1986 | |
1987 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1988 | ||
6e7cb837 YH |
1989 | hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg)); |
1990 | memset(hdr, 0, sizeof(struct mld_msg)); | |
1991 | hdr->mld_type = type; | |
4e3fd7a0 | 1992 | hdr->mld_mca = *addr; |
1da177e4 | 1993 | |
6e7cb837 YH |
1994 | hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len, |
1995 | IPPROTO_ICMPV6, | |
1996 | csum_partial(hdr, len, 0)); | |
1da177e4 | 1997 | |
96b52e61 ED |
1998 | rcu_read_lock(); |
1999 | idev = __in6_dev_get(skb->dev); | |
1da177e4 | 2000 | |
4c9483b2 | 2001 | icmpv6_flow_init(sk, &fl6, type, |
41927178 YH |
2002 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
2003 | skb->dev->ifindex); | |
12fd84f4 | 2004 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
452edd59 DM |
2005 | if (IS_ERR(dst)) { |
2006 | err = PTR_ERR(dst); | |
41927178 | 2007 | goto err_out; |
452edd59 | 2008 | } |
41927178 | 2009 | |
adf30907 | 2010 | skb_dst_set(skb, dst); |
7026b1dd | 2011 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, sk, skb, |
5a70649e | 2012 | NULL, skb->dev, dst_output); |
41927178 | 2013 | out: |
1da177e4 | 2014 | if (!err) { |
5c5d244b | 2015 | ICMP6MSGOUT_INC_STATS(net, idev, type); |
a862f6a6 | 2016 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); |
edf391ff | 2017 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len); |
1da177e4 | 2018 | } else |
3bd653c8 | 2019 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 | 2020 | |
96b52e61 | 2021 | rcu_read_unlock(); |
1da177e4 | 2022 | return; |
41927178 YH |
2023 | |
2024 | err_out: | |
2025 | kfree_skb(skb); | |
2026 | goto out; | |
1da177e4 LT |
2027 | } |
2028 | ||
6a7cc418 | 2029 | static void mld_send_initial_cr(struct inet6_dev *idev) |
b173ee48 | 2030 | { |
6a7cc418 FL |
2031 | struct sk_buff *skb; |
2032 | struct ifmcaddr6 *pmc; | |
2033 | int type; | |
2034 | ||
2035 | if (mld_in_v1_mode(idev)) | |
2036 | return; | |
2037 | ||
2038 | skb = NULL; | |
2039 | read_lock_bh(&idev->lock); | |
67ba4152 | 2040 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
6a7cc418 FL |
2041 | spin_lock_bh(&pmc->mca_lock); |
2042 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2043 | type = MLD2_CHANGE_TO_EXCLUDE; | |
2044 | else | |
2045 | type = MLD2_CHANGE_TO_INCLUDE; | |
2046 | skb = add_grec(skb, pmc, type, 0, 0, 1); | |
2047 | spin_unlock_bh(&pmc->mca_lock); | |
b173ee48 | 2048 | } |
6a7cc418 FL |
2049 | read_unlock_bh(&idev->lock); |
2050 | if (skb) | |
2051 | mld_sendpack(skb); | |
b173ee48 HFS |
2052 | } |
2053 | ||
2054 | void ipv6_mc_dad_complete(struct inet6_dev *idev) | |
2055 | { | |
2056 | idev->mc_dad_count = idev->mc_qrv; | |
2057 | if (idev->mc_dad_count) { | |
6a7cc418 | 2058 | mld_send_initial_cr(idev); |
b173ee48 HFS |
2059 | idev->mc_dad_count--; |
2060 | if (idev->mc_dad_count) | |
2061 | mld_dad_start_timer(idev, idev->mc_maxdelay); | |
2062 | } | |
2063 | } | |
2064 | ||
2065 | static void mld_dad_timer_expire(unsigned long data) | |
2066 | { | |
2067 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2068 | ||
6a7cc418 | 2069 | mld_send_initial_cr(idev); |
b173ee48 HFS |
2070 | if (idev->mc_dad_count) { |
2071 | idev->mc_dad_count--; | |
2072 | if (idev->mc_dad_count) | |
2073 | mld_dad_start_timer(idev, idev->mc_maxdelay); | |
2074 | } | |
9260d3e1 | 2075 | in6_dev_put(idev); |
b173ee48 HFS |
2076 | } |
2077 | ||
1da177e4 | 2078 | static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode, |
b71d1d42 | 2079 | const struct in6_addr *psfsrc) |
1da177e4 LT |
2080 | { |
2081 | struct ip6_sf_list *psf, *psf_prev; | |
2082 | int rv = 0; | |
2083 | ||
2084 | psf_prev = NULL; | |
67ba4152 | 2085 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2086 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
2087 | break; | |
2088 | psf_prev = psf; | |
2089 | } | |
2090 | if (!psf || psf->sf_count[sfmode] == 0) { | |
2091 | /* source filter not found, or count wrong => bug */ | |
2092 | return -ESRCH; | |
2093 | } | |
2094 | psf->sf_count[sfmode]--; | |
2095 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { | |
2096 | struct inet6_dev *idev = pmc->idev; | |
2097 | ||
2098 | /* no more filters for this source */ | |
2099 | if (psf_prev) | |
2100 | psf_prev->sf_next = psf->sf_next; | |
2101 | else | |
2102 | pmc->mca_sources = psf->sf_next; | |
2103 | if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) && | |
6c567b78 | 2104 | !mld_in_v1_mode(idev)) { |
1da177e4 LT |
2105 | psf->sf_crcount = idev->mc_qrv; |
2106 | psf->sf_next = pmc->mca_tomb; | |
2107 | pmc->mca_tomb = psf; | |
2108 | rv = 1; | |
2109 | } else | |
2110 | kfree(psf); | |
2111 | } | |
2112 | return rv; | |
2113 | } | |
2114 | ||
b71d1d42 ED |
2115 | static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
2116 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
2117 | int delta) |
2118 | { | |
2119 | struct ifmcaddr6 *pmc; | |
2120 | int changerec = 0; | |
2121 | int i, err; | |
2122 | ||
2123 | if (!idev) | |
2124 | return -ENODEV; | |
2125 | read_lock_bh(&idev->lock); | |
67ba4152 | 2126 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
2127 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
2128 | break; | |
2129 | } | |
2130 | if (!pmc) { | |
2131 | /* MCA not found?? bug */ | |
2132 | read_unlock_bh(&idev->lock); | |
2133 | return -ESRCH; | |
2134 | } | |
2135 | spin_lock_bh(&pmc->mca_lock); | |
2136 | sf_markstate(pmc); | |
2137 | if (!delta) { | |
2138 | if (!pmc->mca_sfcount[sfmode]) { | |
2139 | spin_unlock_bh(&pmc->mca_lock); | |
2140 | read_unlock_bh(&idev->lock); | |
2141 | return -EINVAL; | |
2142 | } | |
2143 | pmc->mca_sfcount[sfmode]--; | |
2144 | } | |
2145 | err = 0; | |
67ba4152 | 2146 | for (i = 0; i < sfcount; i++) { |
1da177e4 LT |
2147 | int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); |
2148 | ||
2149 | changerec |= rv > 0; | |
2150 | if (!err && rv < 0) | |
2151 | err = rv; | |
2152 | } | |
2153 | if (pmc->mca_sfmode == MCAST_EXCLUDE && | |
2154 | pmc->mca_sfcount[MCAST_EXCLUDE] == 0 && | |
2155 | pmc->mca_sfcount[MCAST_INCLUDE]) { | |
2156 | struct ip6_sf_list *psf; | |
2157 | ||
2158 | /* filter mode change */ | |
2159 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2160 | pmc->mca_crcount = idev->mc_qrv; | |
2161 | idev->mc_ifc_count = pmc->mca_crcount; | |
67ba4152 | 2162 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2163 | psf->sf_crcount = 0; |
2164 | mld_ifc_event(pmc->idev); | |
2165 | } else if (sf_setstate(pmc) || changerec) | |
2166 | mld_ifc_event(pmc->idev); | |
2167 | spin_unlock_bh(&pmc->mca_lock); | |
2168 | read_unlock_bh(&idev->lock); | |
2169 | return err; | |
2170 | } | |
2171 | ||
2172 | /* | |
2173 | * Add multicast single-source filter to the interface list | |
2174 | */ | |
2175 | static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode, | |
99d2f47a | 2176 | const struct in6_addr *psfsrc) |
1da177e4 LT |
2177 | { |
2178 | struct ip6_sf_list *psf, *psf_prev; | |
2179 | ||
2180 | psf_prev = NULL; | |
67ba4152 | 2181 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2182 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
2183 | break; | |
2184 | psf_prev = psf; | |
2185 | } | |
2186 | if (!psf) { | |
0c600eda | 2187 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
1da177e4 LT |
2188 | if (!psf) |
2189 | return -ENOBUFS; | |
0c600eda | 2190 | |
1da177e4 LT |
2191 | psf->sf_addr = *psfsrc; |
2192 | if (psf_prev) { | |
2193 | psf_prev->sf_next = psf; | |
2194 | } else | |
2195 | pmc->mca_sources = psf; | |
2196 | } | |
2197 | psf->sf_count[sfmode]++; | |
2198 | return 0; | |
2199 | } | |
2200 | ||
2201 | static void sf_markstate(struct ifmcaddr6 *pmc) | |
2202 | { | |
2203 | struct ip6_sf_list *psf; | |
2204 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; | |
2205 | ||
67ba4152 | 2206 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2207 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
2208 | psf->sf_oldin = mca_xcount == | |
2209 | psf->sf_count[MCAST_EXCLUDE] && | |
2210 | !psf->sf_count[MCAST_INCLUDE]; | |
2211 | } else | |
2212 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; | |
2213 | } | |
2214 | ||
2215 | static int sf_setstate(struct ifmcaddr6 *pmc) | |
2216 | { | |
7add2a43 | 2217 | struct ip6_sf_list *psf, *dpsf; |
1da177e4 LT |
2218 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
2219 | int qrv = pmc->idev->mc_qrv; | |
2220 | int new_in, rv; | |
2221 | ||
2222 | rv = 0; | |
67ba4152 | 2223 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2224 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
2225 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && | |
2226 | !psf->sf_count[MCAST_INCLUDE]; | |
2227 | } else | |
2228 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; | |
7add2a43 DS |
2229 | if (new_in) { |
2230 | if (!psf->sf_oldin) { | |
e80e28b6 | 2231 | struct ip6_sf_list *prev = NULL; |
7add2a43 | 2232 | |
67ba4152 IM |
2233 | for (dpsf = pmc->mca_tomb; dpsf; |
2234 | dpsf = dpsf->sf_next) { | |
7add2a43 DS |
2235 | if (ipv6_addr_equal(&dpsf->sf_addr, |
2236 | &psf->sf_addr)) | |
2237 | break; | |
2238 | prev = dpsf; | |
2239 | } | |
2240 | if (dpsf) { | |
2241 | if (prev) | |
2242 | prev->sf_next = dpsf->sf_next; | |
2243 | else | |
2244 | pmc->mca_tomb = dpsf->sf_next; | |
2245 | kfree(dpsf); | |
2246 | } | |
2247 | psf->sf_crcount = qrv; | |
2248 | rv++; | |
2249 | } | |
2250 | } else if (psf->sf_oldin) { | |
2251 | psf->sf_crcount = 0; | |
2252 | /* | |
2253 | * add or update "delete" records if an active filter | |
2254 | * is now inactive | |
2255 | */ | |
67ba4152 | 2256 | for (dpsf = pmc->mca_tomb; dpsf; dpsf = dpsf->sf_next) |
7add2a43 DS |
2257 | if (ipv6_addr_equal(&dpsf->sf_addr, |
2258 | &psf->sf_addr)) | |
2259 | break; | |
2260 | if (!dpsf) { | |
5d55354f | 2261 | dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC); |
7add2a43 DS |
2262 | if (!dpsf) |
2263 | continue; | |
2264 | *dpsf = *psf; | |
2265 | /* pmc->mca_lock held by callers */ | |
2266 | dpsf->sf_next = pmc->mca_tomb; | |
2267 | pmc->mca_tomb = dpsf; | |
2268 | } | |
2269 | dpsf->sf_crcount = qrv; | |
1da177e4 LT |
2270 | rv++; |
2271 | } | |
2272 | } | |
2273 | return rv; | |
2274 | } | |
2275 | ||
2276 | /* | |
2277 | * Add multicast source filter list to the interface list | |
2278 | */ | |
b71d1d42 ED |
2279 | static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
2280 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
2281 | int delta) |
2282 | { | |
2283 | struct ifmcaddr6 *pmc; | |
2284 | int isexclude; | |
2285 | int i, err; | |
2286 | ||
2287 | if (!idev) | |
2288 | return -ENODEV; | |
2289 | read_lock_bh(&idev->lock); | |
67ba4152 | 2290 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
2291 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
2292 | break; | |
2293 | } | |
2294 | if (!pmc) { | |
2295 | /* MCA not found?? bug */ | |
2296 | read_unlock_bh(&idev->lock); | |
2297 | return -ESRCH; | |
2298 | } | |
2299 | spin_lock_bh(&pmc->mca_lock); | |
2300 | ||
2301 | sf_markstate(pmc); | |
2302 | isexclude = pmc->mca_sfmode == MCAST_EXCLUDE; | |
2303 | if (!delta) | |
2304 | pmc->mca_sfcount[sfmode]++; | |
2305 | err = 0; | |
67ba4152 | 2306 | for (i = 0; i < sfcount; i++) { |
99d2f47a | 2307 | err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]); |
1da177e4 LT |
2308 | if (err) |
2309 | break; | |
2310 | } | |
2311 | if (err) { | |
2312 | int j; | |
2313 | ||
2314 | if (!delta) | |
2315 | pmc->mca_sfcount[sfmode]--; | |
67ba4152 | 2316 | for (j = 0; j < i; j++) |
78d50217 | 2317 | ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]); |
1da177e4 | 2318 | } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) { |
1da177e4 LT |
2319 | struct ip6_sf_list *psf; |
2320 | ||
2321 | /* filter mode change */ | |
2322 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2323 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
2324 | else if (pmc->mca_sfcount[MCAST_INCLUDE]) | |
2325 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2326 | /* else no filters; keep old mode for reports */ | |
2327 | ||
2328 | pmc->mca_crcount = idev->mc_qrv; | |
2329 | idev->mc_ifc_count = pmc->mca_crcount; | |
67ba4152 | 2330 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2331 | psf->sf_crcount = 0; |
2332 | mld_ifc_event(idev); | |
2333 | } else if (sf_setstate(pmc)) | |
2334 | mld_ifc_event(idev); | |
2335 | spin_unlock_bh(&pmc->mca_lock); | |
2336 | read_unlock_bh(&idev->lock); | |
2337 | return err; | |
2338 | } | |
2339 | ||
2340 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc) | |
2341 | { | |
2342 | struct ip6_sf_list *psf, *nextpsf; | |
2343 | ||
67ba4152 | 2344 | for (psf = pmc->mca_tomb; psf; psf = nextpsf) { |
1da177e4 LT |
2345 | nextpsf = psf->sf_next; |
2346 | kfree(psf); | |
2347 | } | |
2348 | pmc->mca_tomb = NULL; | |
67ba4152 | 2349 | for (psf = pmc->mca_sources; psf; psf = nextpsf) { |
1da177e4 LT |
2350 | nextpsf = psf->sf_next; |
2351 | kfree(psf); | |
2352 | } | |
2353 | pmc->mca_sources = NULL; | |
2354 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
de9daad9 | 2355 | pmc->mca_sfcount[MCAST_INCLUDE] = 0; |
1da177e4 LT |
2356 | pmc->mca_sfcount[MCAST_EXCLUDE] = 1; |
2357 | } | |
2358 | ||
2359 | ||
2360 | static void igmp6_join_group(struct ifmcaddr6 *ma) | |
2361 | { | |
2362 | unsigned long delay; | |
2363 | ||
2364 | if (ma->mca_flags & MAF_NOREPORT) | |
2365 | return; | |
2366 | ||
2367 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2368 | ||
63862b5b | 2369 | delay = prandom_u32() % unsolicited_report_interval(ma->idev); |
1da177e4 LT |
2370 | |
2371 | spin_lock_bh(&ma->mca_lock); | |
2372 | if (del_timer(&ma->mca_timer)) { | |
2373 | atomic_dec(&ma->mca_refcnt); | |
2374 | delay = ma->mca_timer.expires - jiffies; | |
2375 | } | |
2376 | ||
2377 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
2378 | atomic_inc(&ma->mca_refcnt); | |
2379 | ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER; | |
2380 | spin_unlock_bh(&ma->mca_lock); | |
2381 | } | |
2382 | ||
2383 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
2384 | struct inet6_dev *idev) | |
2385 | { | |
2386 | int err; | |
2387 | ||
f7ed925c | 2388 | /* callers have the socket lock and rtnl lock |
5ab4a6c8 DS |
2389 | * so no other readers or writers of iml or its sflist |
2390 | */ | |
cfcabdcc | 2391 | if (!iml->sflist) { |
1da177e4 LT |
2392 | /* any-source empty exclude case */ |
2393 | return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0); | |
2394 | } | |
2395 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, | |
2396 | iml->sflist->sl_count, iml->sflist->sl_addr, 0); | |
2397 | sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max)); | |
2398 | iml->sflist = NULL; | |
2399 | return err; | |
2400 | } | |
2401 | ||
2402 | static void igmp6_leave_group(struct ifmcaddr6 *ma) | |
2403 | { | |
6c567b78 | 2404 | if (mld_in_v1_mode(ma->idev)) { |
1da177e4 LT |
2405 | if (ma->mca_flags & MAF_LAST_REPORTER) |
2406 | igmp6_send(&ma->mca_addr, ma->idev->dev, | |
2407 | ICMPV6_MGM_REDUCTION); | |
2408 | } else { | |
2409 | mld_add_delrec(ma->idev, ma); | |
2410 | mld_ifc_event(ma->idev); | |
2411 | } | |
2412 | } | |
2413 | ||
2414 | static void mld_gq_timer_expire(unsigned long data) | |
2415 | { | |
2416 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2417 | ||
2418 | idev->mc_gq_running = 0; | |
2419 | mld_send_report(idev, NULL); | |
9260d3e1 | 2420 | in6_dev_put(idev); |
1da177e4 LT |
2421 | } |
2422 | ||
2423 | static void mld_ifc_timer_expire(unsigned long data) | |
2424 | { | |
2425 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2426 | ||
2427 | mld_send_cr(idev); | |
2428 | if (idev->mc_ifc_count) { | |
2429 | idev->mc_ifc_count--; | |
2430 | if (idev->mc_ifc_count) | |
2431 | mld_ifc_start_timer(idev, idev->mc_maxdelay); | |
2432 | } | |
9260d3e1 | 2433 | in6_dev_put(idev); |
1da177e4 LT |
2434 | } |
2435 | ||
2436 | static void mld_ifc_event(struct inet6_dev *idev) | |
2437 | { | |
6c567b78 | 2438 | if (mld_in_v1_mode(idev)) |
1da177e4 LT |
2439 | return; |
2440 | idev->mc_ifc_count = idev->mc_qrv; | |
2441 | mld_ifc_start_timer(idev, 1); | |
2442 | } | |
2443 | ||
2444 | ||
2445 | static void igmp6_timer_handler(unsigned long data) | |
2446 | { | |
2447 | struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data; | |
2448 | ||
6c567b78 | 2449 | if (mld_in_v1_mode(ma->idev)) |
1da177e4 LT |
2450 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); |
2451 | else | |
2452 | mld_send_report(ma->idev, ma); | |
2453 | ||
2454 | spin_lock(&ma->mca_lock); | |
2455 | ma->mca_flags |= MAF_LAST_REPORTER; | |
2456 | ma->mca_flags &= ~MAF_TIMER_RUNNING; | |
2457 | spin_unlock(&ma->mca_lock); | |
2458 | ma_put(ma); | |
2459 | } | |
2460 | ||
75c78500 MS |
2461 | /* Device changing type */ |
2462 | ||
2463 | void ipv6_mc_unmap(struct inet6_dev *idev) | |
2464 | { | |
2465 | struct ifmcaddr6 *i; | |
2466 | ||
2467 | /* Install multicast list, except for all-nodes (already installed) */ | |
2468 | ||
2469 | read_lock_bh(&idev->lock); | |
2470 | for (i = idev->mc_list; i; i = i->next) | |
2471 | igmp6_group_dropped(i); | |
2472 | read_unlock_bh(&idev->lock); | |
2473 | } | |
2474 | ||
2475 | void ipv6_mc_remap(struct inet6_dev *idev) | |
2476 | { | |
2477 | ipv6_mc_up(idev); | |
2478 | } | |
2479 | ||
1da177e4 LT |
2480 | /* Device going down */ |
2481 | ||
2482 | void ipv6_mc_down(struct inet6_dev *idev) | |
2483 | { | |
2484 | struct ifmcaddr6 *i; | |
2485 | ||
2486 | /* Withdraw multicast list */ | |
2487 | ||
2488 | read_lock_bh(&idev->lock); | |
b4af8def DB |
2489 | mld_ifc_stop_timer(idev); |
2490 | mld_gq_stop_timer(idev); | |
2491 | mld_dad_stop_timer(idev); | |
1da177e4 | 2492 | |
67ba4152 | 2493 | for (i = idev->mc_list; i; i = i->next) |
1da177e4 LT |
2494 | igmp6_group_dropped(i); |
2495 | read_unlock_bh(&idev->lock); | |
2496 | ||
2497 | mld_clear_delrec(idev); | |
2498 | } | |
2499 | ||
2f711939 HFS |
2500 | static void ipv6_mc_reset(struct inet6_dev *idev) |
2501 | { | |
2502 | idev->mc_qrv = sysctl_mld_qrv; | |
2503 | idev->mc_qi = MLD_QI_DEFAULT; | |
2504 | idev->mc_qri = MLD_QRI_DEFAULT; | |
2505 | idev->mc_v1_seen = 0; | |
2506 | idev->mc_maxdelay = unsolicited_report_interval(idev); | |
2507 | } | |
1da177e4 LT |
2508 | |
2509 | /* Device going up */ | |
2510 | ||
2511 | void ipv6_mc_up(struct inet6_dev *idev) | |
2512 | { | |
2513 | struct ifmcaddr6 *i; | |
2514 | ||
2515 | /* Install multicast list, except for all-nodes (already installed) */ | |
2516 | ||
2517 | read_lock_bh(&idev->lock); | |
2f711939 | 2518 | ipv6_mc_reset(idev); |
67ba4152 | 2519 | for (i = idev->mc_list; i; i = i->next) |
1da177e4 LT |
2520 | igmp6_group_added(i); |
2521 | read_unlock_bh(&idev->lock); | |
2522 | } | |
2523 | ||
2524 | /* IPv6 device initialization. */ | |
2525 | ||
2526 | void ipv6_mc_init_dev(struct inet6_dev *idev) | |
2527 | { | |
1da177e4 | 2528 | write_lock_bh(&idev->lock); |
6457d26b | 2529 | spin_lock_init(&idev->mc_lock); |
1da177e4 | 2530 | idev->mc_gq_running = 0; |
b24b8a24 PE |
2531 | setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire, |
2532 | (unsigned long)idev); | |
1da177e4 LT |
2533 | idev->mc_tomb = NULL; |
2534 | idev->mc_ifc_count = 0; | |
b24b8a24 PE |
2535 | setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire, |
2536 | (unsigned long)idev); | |
b173ee48 HFS |
2537 | setup_timer(&idev->mc_dad_timer, mld_dad_timer_expire, |
2538 | (unsigned long)idev); | |
2f711939 | 2539 | ipv6_mc_reset(idev); |
1da177e4 | 2540 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
2541 | } |
2542 | ||
2543 | /* | |
2544 | * Device is about to be destroyed: clean up. | |
2545 | */ | |
2546 | ||
2547 | void ipv6_mc_destroy_dev(struct inet6_dev *idev) | |
2548 | { | |
2549 | struct ifmcaddr6 *i; | |
1da177e4 LT |
2550 | |
2551 | /* Deactivate timers */ | |
2552 | ipv6_mc_down(idev); | |
2553 | ||
2554 | /* Delete all-nodes address. */ | |
1da177e4 LT |
2555 | /* We cannot call ipv6_dev_mc_dec() directly, our caller in |
2556 | * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will | |
2557 | * fail. | |
2558 | */ | |
f3ee4010 | 2559 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes); |
1da177e4 | 2560 | |
f3ee4010 YH |
2561 | if (idev->cnf.forwarding) |
2562 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters); | |
1da177e4 LT |
2563 | |
2564 | write_lock_bh(&idev->lock); | |
2565 | while ((i = idev->mc_list) != NULL) { | |
2566 | idev->mc_list = i->next; | |
2567 | write_unlock_bh(&idev->lock); | |
2568 | ||
2569 | igmp6_group_dropped(i); | |
2570 | ma_put(i); | |
2571 | ||
2572 | write_lock_bh(&idev->lock); | |
2573 | } | |
2574 | write_unlock_bh(&idev->lock); | |
2575 | } | |
2576 | ||
2577 | #ifdef CONFIG_PROC_FS | |
2578 | struct igmp6_mc_iter_state { | |
b8ad0cbc | 2579 | struct seq_net_private p; |
1da177e4 LT |
2580 | struct net_device *dev; |
2581 | struct inet6_dev *idev; | |
2582 | }; | |
2583 | ||
2584 | #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private) | |
2585 | ||
2586 | static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq) | |
2587 | { | |
2588 | struct ifmcaddr6 *im = NULL; | |
2589 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
1218854a | 2590 | struct net *net = seq_file_net(seq); |
1da177e4 | 2591 | |
7562f876 | 2592 | state->idev = NULL; |
ce81b76a | 2593 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2594 | struct inet6_dev *idev; |
ce81b76a | 2595 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2596 | if (!idev) |
2597 | continue; | |
2598 | read_lock_bh(&idev->lock); | |
2599 | im = idev->mc_list; | |
2600 | if (im) { | |
2601 | state->idev = idev; | |
2602 | break; | |
2603 | } | |
2604 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2605 | } |
2606 | return im; | |
2607 | } | |
2608 | ||
2609 | static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im) | |
2610 | { | |
2611 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2612 | ||
2613 | im = im->next; | |
2614 | while (!im) { | |
53b24b8f | 2615 | if (likely(state->idev)) |
1da177e4 | 2616 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2617 | |
2618 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2619 | if (!state->dev) { |
2620 | state->idev = NULL; | |
2621 | break; | |
2622 | } | |
ce81b76a | 2623 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2624 | if (!state->idev) |
2625 | continue; | |
2626 | read_lock_bh(&state->idev->lock); | |
2627 | im = state->idev->mc_list; | |
2628 | } | |
2629 | return im; | |
2630 | } | |
2631 | ||
2632 | static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos) | |
2633 | { | |
2634 | struct ifmcaddr6 *im = igmp6_mc_get_first(seq); | |
2635 | if (im) | |
2636 | while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL) | |
2637 | --pos; | |
2638 | return pos ? NULL : im; | |
2639 | } | |
2640 | ||
2641 | static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2642 | __acquires(RCU) |
1da177e4 | 2643 | { |
ce81b76a | 2644 | rcu_read_lock(); |
1da177e4 LT |
2645 | return igmp6_mc_get_idx(seq, *pos); |
2646 | } | |
2647 | ||
2648 | static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2649 | { | |
ce81b76a ED |
2650 | struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v); |
2651 | ||
1da177e4 LT |
2652 | ++*pos; |
2653 | return im; | |
2654 | } | |
2655 | ||
2656 | static void igmp6_mc_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2657 | __releases(RCU) |
1da177e4 LT |
2658 | { |
2659 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
ce81b76a | 2660 | |
53b24b8f | 2661 | if (likely(state->idev)) { |
1da177e4 | 2662 | read_unlock_bh(&state->idev->lock); |
1da177e4 LT |
2663 | state->idev = NULL; |
2664 | } | |
2665 | state->dev = NULL; | |
ce81b76a | 2666 | rcu_read_unlock(); |
1da177e4 LT |
2667 | } |
2668 | ||
2669 | static int igmp6_mc_seq_show(struct seq_file *seq, void *v) | |
2670 | { | |
2671 | struct ifmcaddr6 *im = (struct ifmcaddr6 *)v; | |
2672 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2673 | ||
2674 | seq_printf(seq, | |
4b7a4274 | 2675 | "%-4d %-15s %pi6 %5d %08X %ld\n", |
1da177e4 | 2676 | state->dev->ifindex, state->dev->name, |
b071195d | 2677 | &im->mca_addr, |
1da177e4 LT |
2678 | im->mca_users, im->mca_flags, |
2679 | (im->mca_flags&MAF_TIMER_RUNNING) ? | |
2680 | jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0); | |
2681 | return 0; | |
2682 | } | |
2683 | ||
56b3d975 | 2684 | static const struct seq_operations igmp6_mc_seq_ops = { |
1da177e4 LT |
2685 | .start = igmp6_mc_seq_start, |
2686 | .next = igmp6_mc_seq_next, | |
2687 | .stop = igmp6_mc_seq_stop, | |
2688 | .show = igmp6_mc_seq_show, | |
2689 | }; | |
2690 | ||
2691 | static int igmp6_mc_seq_open(struct inode *inode, struct file *file) | |
2692 | { | |
b8ad0cbc DL |
2693 | return seq_open_net(inode, file, &igmp6_mc_seq_ops, |
2694 | sizeof(struct igmp6_mc_iter_state)); | |
1da177e4 LT |
2695 | } |
2696 | ||
9a32144e | 2697 | static const struct file_operations igmp6_mc_seq_fops = { |
1da177e4 LT |
2698 | .owner = THIS_MODULE, |
2699 | .open = igmp6_mc_seq_open, | |
2700 | .read = seq_read, | |
2701 | .llseek = seq_lseek, | |
b8ad0cbc | 2702 | .release = seq_release_net, |
1da177e4 LT |
2703 | }; |
2704 | ||
2705 | struct igmp6_mcf_iter_state { | |
b8ad0cbc | 2706 | struct seq_net_private p; |
1da177e4 LT |
2707 | struct net_device *dev; |
2708 | struct inet6_dev *idev; | |
2709 | struct ifmcaddr6 *im; | |
2710 | }; | |
2711 | ||
2712 | #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private) | |
2713 | ||
2714 | static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq) | |
2715 | { | |
2716 | struct ip6_sf_list *psf = NULL; | |
2717 | struct ifmcaddr6 *im = NULL; | |
2718 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
1218854a | 2719 | struct net *net = seq_file_net(seq); |
1da177e4 | 2720 | |
7562f876 PE |
2721 | state->idev = NULL; |
2722 | state->im = NULL; | |
ce81b76a | 2723 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2724 | struct inet6_dev *idev; |
ce81b76a | 2725 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2726 | if (unlikely(idev == NULL)) |
2727 | continue; | |
2728 | read_lock_bh(&idev->lock); | |
2729 | im = idev->mc_list; | |
53b24b8f | 2730 | if (likely(im)) { |
1da177e4 LT |
2731 | spin_lock_bh(&im->mca_lock); |
2732 | psf = im->mca_sources; | |
53b24b8f | 2733 | if (likely(psf)) { |
1da177e4 LT |
2734 | state->im = im; |
2735 | state->idev = idev; | |
2736 | break; | |
2737 | } | |
2738 | spin_unlock_bh(&im->mca_lock); | |
2739 | } | |
2740 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2741 | } |
2742 | return psf; | |
2743 | } | |
2744 | ||
2745 | static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf) | |
2746 | { | |
2747 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2748 | ||
2749 | psf = psf->sf_next; | |
2750 | while (!psf) { | |
2751 | spin_unlock_bh(&state->im->mca_lock); | |
2752 | state->im = state->im->next; | |
2753 | while (!state->im) { | |
53b24b8f | 2754 | if (likely(state->idev)) |
1da177e4 | 2755 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2756 | |
2757 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2758 | if (!state->dev) { |
2759 | state->idev = NULL; | |
2760 | goto out; | |
2761 | } | |
ce81b76a | 2762 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2763 | if (!state->idev) |
2764 | continue; | |
2765 | read_lock_bh(&state->idev->lock); | |
2766 | state->im = state->idev->mc_list; | |
2767 | } | |
2768 | if (!state->im) | |
2769 | break; | |
2770 | spin_lock_bh(&state->im->mca_lock); | |
2771 | psf = state->im->mca_sources; | |
2772 | } | |
2773 | out: | |
2774 | return psf; | |
2775 | } | |
2776 | ||
2777 | static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos) | |
2778 | { | |
2779 | struct ip6_sf_list *psf = igmp6_mcf_get_first(seq); | |
2780 | if (psf) | |
2781 | while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL) | |
2782 | --pos; | |
2783 | return pos ? NULL : psf; | |
2784 | } | |
2785 | ||
2786 | static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2787 | __acquires(RCU) |
1da177e4 | 2788 | { |
ce81b76a | 2789 | rcu_read_lock(); |
1da177e4 LT |
2790 | return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
2791 | } | |
2792 | ||
2793 | static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2794 | { | |
2795 | struct ip6_sf_list *psf; | |
2796 | if (v == SEQ_START_TOKEN) | |
2797 | psf = igmp6_mcf_get_first(seq); | |
2798 | else | |
2799 | psf = igmp6_mcf_get_next(seq, v); | |
2800 | ++*pos; | |
2801 | return psf; | |
2802 | } | |
2803 | ||
2804 | static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2805 | __releases(RCU) |
1da177e4 LT |
2806 | { |
2807 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
53b24b8f | 2808 | if (likely(state->im)) { |
1da177e4 LT |
2809 | spin_unlock_bh(&state->im->mca_lock); |
2810 | state->im = NULL; | |
2811 | } | |
53b24b8f | 2812 | if (likely(state->idev)) { |
1da177e4 | 2813 | read_unlock_bh(&state->idev->lock); |
1da177e4 LT |
2814 | state->idev = NULL; |
2815 | } | |
2816 | state->dev = NULL; | |
ce81b76a | 2817 | rcu_read_unlock(); |
1da177e4 LT |
2818 | } |
2819 | ||
2820 | static int igmp6_mcf_seq_show(struct seq_file *seq, void *v) | |
2821 | { | |
2822 | struct ip6_sf_list *psf = (struct ip6_sf_list *)v; | |
2823 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2824 | ||
2825 | if (v == SEQ_START_TOKEN) { | |
1744bea1 | 2826 | seq_puts(seq, "Idx Device Multicast Address Source Address INC EXC\n"); |
1da177e4 LT |
2827 | } else { |
2828 | seq_printf(seq, | |
4b7a4274 | 2829 | "%3d %6.6s %pi6 %pi6 %6lu %6lu\n", |
1da177e4 | 2830 | state->dev->ifindex, state->dev->name, |
b071195d HH |
2831 | &state->im->mca_addr, |
2832 | &psf->sf_addr, | |
1da177e4 LT |
2833 | psf->sf_count[MCAST_INCLUDE], |
2834 | psf->sf_count[MCAST_EXCLUDE]); | |
2835 | } | |
2836 | return 0; | |
2837 | } | |
2838 | ||
56b3d975 | 2839 | static const struct seq_operations igmp6_mcf_seq_ops = { |
1da177e4 LT |
2840 | .start = igmp6_mcf_seq_start, |
2841 | .next = igmp6_mcf_seq_next, | |
2842 | .stop = igmp6_mcf_seq_stop, | |
2843 | .show = igmp6_mcf_seq_show, | |
2844 | }; | |
2845 | ||
2846 | static int igmp6_mcf_seq_open(struct inode *inode, struct file *file) | |
2847 | { | |
b8ad0cbc DL |
2848 | return seq_open_net(inode, file, &igmp6_mcf_seq_ops, |
2849 | sizeof(struct igmp6_mcf_iter_state)); | |
1da177e4 LT |
2850 | } |
2851 | ||
9a32144e | 2852 | static const struct file_operations igmp6_mcf_seq_fops = { |
1da177e4 LT |
2853 | .owner = THIS_MODULE, |
2854 | .open = igmp6_mcf_seq_open, | |
2855 | .read = seq_read, | |
2856 | .llseek = seq_lseek, | |
b8ad0cbc | 2857 | .release = seq_release_net, |
1da177e4 | 2858 | }; |
ea82edf7 | 2859 | |
2c8c1e72 | 2860 | static int __net_init igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2861 | { |
2862 | int err; | |
2863 | ||
2864 | err = -ENOMEM; | |
d4beaa66 | 2865 | if (!proc_create("igmp6", S_IRUGO, net->proc_net, &igmp6_mc_seq_fops)) |
ea82edf7 | 2866 | goto out; |
d4beaa66 G |
2867 | if (!proc_create("mcfilter6", S_IRUGO, net->proc_net, |
2868 | &igmp6_mcf_seq_fops)) | |
ea82edf7 DL |
2869 | goto out_proc_net_igmp6; |
2870 | ||
2871 | err = 0; | |
2872 | out: | |
2873 | return err; | |
2874 | ||
2875 | out_proc_net_igmp6: | |
ece31ffd | 2876 | remove_proc_entry("igmp6", net->proc_net); |
ea82edf7 DL |
2877 | goto out; |
2878 | } | |
2879 | ||
2c8c1e72 | 2880 | static void __net_exit igmp6_proc_exit(struct net *net) |
ea82edf7 | 2881 | { |
ece31ffd G |
2882 | remove_proc_entry("mcfilter6", net->proc_net); |
2883 | remove_proc_entry("igmp6", net->proc_net); | |
ea82edf7 DL |
2884 | } |
2885 | #else | |
2c8c1e72 | 2886 | static inline int igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2887 | { |
2888 | return 0; | |
2889 | } | |
2c8c1e72 | 2890 | static inline void igmp6_proc_exit(struct net *net) |
ea82edf7 | 2891 | { |
ea82edf7 | 2892 | } |
1da177e4 LT |
2893 | #endif |
2894 | ||
2c8c1e72 | 2895 | static int __net_init igmp6_net_init(struct net *net) |
1da177e4 | 2896 | { |
1da177e4 LT |
2897 | int err; |
2898 | ||
1ed8516f DL |
2899 | err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6, |
2900 | SOCK_RAW, IPPROTO_ICMPV6, net); | |
1da177e4 | 2901 | if (err < 0) { |
f3213831 | 2902 | pr_err("Failed to initialize the IGMP6 control socket (err %d)\n", |
1da177e4 | 2903 | err); |
b8ad0cbc | 2904 | goto out; |
1da177e4 LT |
2905 | } |
2906 | ||
1ed8516f | 2907 | inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1; |
1da177e4 | 2908 | |
93a714d6 MC |
2909 | err = inet_ctl_sock_create(&net->ipv6.mc_autojoin_sk, PF_INET6, |
2910 | SOCK_RAW, IPPROTO_ICMPV6, net); | |
2911 | if (err < 0) { | |
2912 | pr_err("Failed to initialize the IGMP6 autojoin socket (err %d)\n", | |
2913 | err); | |
2914 | goto out_sock_create; | |
2915 | } | |
2916 | ||
ea82edf7 DL |
2917 | err = igmp6_proc_init(net); |
2918 | if (err) | |
93a714d6 MC |
2919 | goto out_sock_create_autojoin; |
2920 | ||
2921 | return 0; | |
b8ad0cbc | 2922 | |
93a714d6 MC |
2923 | out_sock_create_autojoin: |
2924 | inet_ctl_sock_destroy(net->ipv6.mc_autojoin_sk); | |
b8ad0cbc | 2925 | out_sock_create: |
1ed8516f | 2926 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
93a714d6 MC |
2927 | out: |
2928 | return err; | |
1da177e4 LT |
2929 | } |
2930 | ||
2c8c1e72 | 2931 | static void __net_exit igmp6_net_exit(struct net *net) |
1da177e4 | 2932 | { |
1ed8516f | 2933 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
93a714d6 | 2934 | inet_ctl_sock_destroy(net->ipv6.mc_autojoin_sk); |
ea82edf7 | 2935 | igmp6_proc_exit(net); |
1da177e4 | 2936 | } |
b8ad0cbc DL |
2937 | |
2938 | static struct pernet_operations igmp6_net_ops = { | |
2939 | .init = igmp6_net_init, | |
2940 | .exit = igmp6_net_exit, | |
2941 | }; | |
2942 | ||
2943 | int __init igmp6_init(void) | |
2944 | { | |
2945 | return register_pernet_subsys(&igmp6_net_ops); | |
2946 | } | |
2947 | ||
2948 | void igmp6_cleanup(void) | |
2949 | { | |
2950 | unregister_pernet_subsys(&igmp6_net_ops); | |
2951 | } |