Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Multicast support for IPv6 | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 | 7 | * |
1ab1457c | 8 | * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c |
1da177e4 LT |
9 | * |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | ||
16 | /* Changes: | |
17 | * | |
18 | * yoshfuji : fix format of router-alert option | |
19 | * YOSHIFUJI Hideaki @USAGI: | |
20 | * Fixed source address for MLD message based on | |
21 | * <draft-ietf-magma-mld-source-05.txt>. | |
22 | * YOSHIFUJI Hideaki @USAGI: | |
23 | * - Ignore Queries for invalid addresses. | |
24 | * - MLD for link-local addresses. | |
25 | * David L Stevens <dlstevens@us.ibm.com>: | |
26 | * - MLDv2 support | |
27 | */ | |
28 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/errno.h> | |
31 | #include <linux/types.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/socket.h> | |
34 | #include <linux/sockios.h> | |
35 | #include <linux/jiffies.h> | |
36 | #include <linux/times.h> | |
37 | #include <linux/net.h> | |
38 | #include <linux/in.h> | |
39 | #include <linux/in6.h> | |
40 | #include <linux/netdevice.h> | |
41 | #include <linux/if_arp.h> | |
42 | #include <linux/route.h> | |
43 | #include <linux/init.h> | |
44 | #include <linux/proc_fs.h> | |
45 | #include <linux/seq_file.h> | |
5a0e3ad6 | 46 | #include <linux/slab.h> |
9d4a0314 | 47 | #include <linux/pkt_sched.h> |
6e7cb837 | 48 | #include <net/mld.h> |
1da177e4 LT |
49 | |
50 | #include <linux/netfilter.h> | |
51 | #include <linux/netfilter_ipv6.h> | |
52 | ||
457c4cbc | 53 | #include <net/net_namespace.h> |
1da177e4 LT |
54 | #include <net/sock.h> |
55 | #include <net/snmp.h> | |
56 | ||
57 | #include <net/ipv6.h> | |
58 | #include <net/protocol.h> | |
59 | #include <net/if_inet6.h> | |
60 | #include <net/ndisc.h> | |
61 | #include <net/addrconf.h> | |
62 | #include <net/ip6_route.h> | |
1ed8516f | 63 | #include <net/inet_common.h> |
1da177e4 LT |
64 | |
65 | #include <net/ip6_checksum.h> | |
66 | ||
6e7cb837 YH |
67 | /* Ensure that we have struct in6_addr aligned on 32bit word. */ |
68 | static void *__mld2_query_bugs[] __attribute__((__unused__)) = { | |
69 | BUILD_BUG_ON_NULL(offsetof(struct mld2_query, mld2q_srcs) % 4), | |
70 | BUILD_BUG_ON_NULL(offsetof(struct mld2_report, mld2r_grec) % 4), | |
71 | BUILD_BUG_ON_NULL(offsetof(struct mld2_grec, grec_mca) % 4) | |
1da177e4 LT |
72 | }; |
73 | ||
74 | static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT; | |
75 | ||
1da177e4 LT |
76 | static void igmp6_join_group(struct ifmcaddr6 *ma); |
77 | static void igmp6_leave_group(struct ifmcaddr6 *ma); | |
78 | static void igmp6_timer_handler(unsigned long data); | |
79 | ||
80 | static void mld_gq_timer_expire(unsigned long data); | |
81 | static void mld_ifc_timer_expire(unsigned long data); | |
82 | static void mld_ifc_event(struct inet6_dev *idev); | |
83 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc); | |
b71d1d42 | 84 | static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *addr); |
1da177e4 | 85 | static void mld_clear_delrec(struct inet6_dev *idev); |
6c567b78 | 86 | static bool mld_in_v1_mode(const struct inet6_dev *idev); |
1da177e4 LT |
87 | static int sf_setstate(struct ifmcaddr6 *pmc); |
88 | static void sf_markstate(struct ifmcaddr6 *pmc); | |
89 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc); | |
b71d1d42 ED |
90 | static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
91 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 | 92 | int delta); |
b71d1d42 ED |
93 | static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
94 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
95 | int delta); |
96 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
97 | struct inet6_dev *idev); | |
98 | ||
1da177e4 | 99 | #define MLD_QRV_DEFAULT 2 |
89225d1c DB |
100 | /* RFC3810, 9.2. Query Interval */ |
101 | #define MLD_QI_DEFAULT (125 * HZ) | |
102 | /* RFC3810, 9.3. Query Response Interval */ | |
103 | #define MLD_QRI_DEFAULT (10 * HZ) | |
1da177e4 | 104 | |
9fd07841 DB |
105 | /* RFC3810, 8.1 Query Version Distinctions */ |
106 | #define MLD_V1_QUERY_LEN 24 | |
107 | #define MLD_V2_QUERY_LEN_MIN 28 | |
108 | ||
6f4353d8 | 109 | #define IPV6_MLD_MAX_MSF 64 |
1da177e4 | 110 | |
ab32ea5d | 111 | int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF; |
2f711939 | 112 | int sysctl_mld_qrv __read_mostly = MLD_QRV_DEFAULT; |
1da177e4 LT |
113 | |
114 | /* | |
115 | * socket join on multicast group | |
116 | */ | |
117 | ||
456b61bc ED |
118 | #define for_each_pmc_rcu(np, pmc) \ |
119 | for (pmc = rcu_dereference(np->ipv6_mc_list); \ | |
120 | pmc != NULL; \ | |
121 | pmc = rcu_dereference(pmc->next)) | |
122 | ||
fc4eba58 HFS |
123 | static int unsolicited_report_interval(struct inet6_dev *idev) |
124 | { | |
125 | int iv; | |
126 | ||
6c567b78 | 127 | if (mld_in_v1_mode(idev)) |
fc4eba58 HFS |
128 | iv = idev->cnf.mldv1_unsolicited_report_interval; |
129 | else | |
130 | iv = idev->cnf.mldv2_unsolicited_report_interval; | |
131 | ||
132 | return iv > 0 ? iv : 1; | |
133 | } | |
134 | ||
9acd9f3a | 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 | ||
143 | if (!ipv6_addr_is_multicast(addr)) | |
144 | return -EINVAL; | |
145 | ||
456b61bc ED |
146 | rcu_read_lock(); |
147 | for_each_pmc_rcu(np, mc_lst) { | |
c9e3e8b6 DS |
148 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
149 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
456b61bc | 150 | rcu_read_unlock(); |
c9e3e8b6 DS |
151 | return -EADDRINUSE; |
152 | } | |
153 | } | |
456b61bc | 154 | rcu_read_unlock(); |
c9e3e8b6 | 155 | |
1da177e4 LT |
156 | mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL); |
157 | ||
158 | if (mc_lst == NULL) | |
159 | return -ENOMEM; | |
160 | ||
161 | mc_lst->next = NULL; | |
4e3fd7a0 | 162 | mc_lst->addr = *addr; |
1da177e4 | 163 | |
a9ed4a29 | 164 | rtnl_lock(); |
1da177e4 LT |
165 | if (ifindex == 0) { |
166 | struct rt6_info *rt; | |
b8ad0cbc | 167 | rt = rt6_lookup(net, addr, NULL, 0, 0); |
1da177e4 | 168 | if (rt) { |
d1918542 | 169 | dev = rt->dst.dev; |
94e187c0 | 170 | ip6_rt_put(rt); |
1da177e4 LT |
171 | } |
172 | } else | |
414b6c94 | 173 | dev = __dev_get_by_index(net, ifindex); |
1da177e4 LT |
174 | |
175 | if (dev == NULL) { | |
a9ed4a29 | 176 | rtnl_unlock(); |
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) { | |
a9ed4a29 | 193 | rtnl_unlock(); |
1da177e4 | 194 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
1da177e4 LT |
195 | return err; |
196 | } | |
197 | ||
1da177e4 | 198 | mc_lst->next = np->ipv6_mc_list; |
456b61bc | 199 | rcu_assign_pointer(np->ipv6_mc_list, mc_lst); |
1da177e4 | 200 | |
a9ed4a29 | 201 | rtnl_unlock(); |
1da177e4 LT |
202 | |
203 | return 0; | |
204 | } | |
205 | ||
206 | /* | |
207 | * socket leave on multicast group | |
208 | */ | |
9acd9f3a | 209 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) |
1da177e4 LT |
210 | { |
211 | struct ipv6_pinfo *np = inet6_sk(sk); | |
456b61bc ED |
212 | struct ipv6_mc_socklist *mc_lst; |
213 | struct ipv6_mc_socklist __rcu **lnk; | |
3b1e0a65 | 214 | struct net *net = sock_net(sk); |
1da177e4 | 215 | |
a858d64b LW |
216 | if (!ipv6_addr_is_multicast(addr)) |
217 | return -EINVAL; | |
218 | ||
a9ed4a29 | 219 | rtnl_lock(); |
456b61bc | 220 | for (lnk = &np->ipv6_mc_list; |
b5350916 | 221 | (mc_lst = rtnl_dereference(*lnk)) != NULL; |
456b61bc | 222 | lnk = &mc_lst->next) { |
1da177e4 LT |
223 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
224 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
225 | struct net_device *dev; | |
226 | ||
227 | *lnk = mc_lst->next; | |
1da177e4 | 228 | |
414b6c94 | 229 | dev = __dev_get_by_index(net, mc_lst->ifindex); |
b8ad0cbc | 230 | if (dev != NULL) { |
96b52e61 | 231 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 232 | |
acd6e00b | 233 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 234 | if (idev) |
1da177e4 | 235 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
236 | } else |
237 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
a9ed4a29 SD |
238 | rtnl_unlock(); |
239 | ||
456b61bc | 240 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 241 | kfree_rcu(mc_lst, rcu); |
1da177e4 LT |
242 | return 0; |
243 | } | |
244 | } | |
a9ed4a29 | 245 | rtnl_unlock(); |
1da177e4 | 246 | |
9951f036 | 247 | return -EADDRNOTAVAIL; |
1da177e4 LT |
248 | } |
249 | ||
96b52e61 ED |
250 | /* called with rcu_read_lock() */ |
251 | static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net, | |
b71d1d42 | 252 | const struct in6_addr *group, |
96b52e61 | 253 | int ifindex) |
1da177e4 LT |
254 | { |
255 | struct net_device *dev = NULL; | |
256 | struct inet6_dev *idev = NULL; | |
257 | ||
258 | if (ifindex == 0) { | |
96b52e61 | 259 | struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0); |
1da177e4 | 260 | |
1da177e4 | 261 | if (rt) { |
d1918542 | 262 | dev = rt->dst.dev; |
94e187c0 | 263 | ip6_rt_put(rt); |
1da177e4 LT |
264 | } |
265 | } else | |
96b52e61 | 266 | dev = dev_get_by_index_rcu(net, ifindex); |
1da177e4 LT |
267 | |
268 | if (!dev) | |
96b52e61 ED |
269 | return NULL; |
270 | idev = __in6_dev_get(dev); | |
448eb71f | 271 | if (!idev) |
8a22c99a | 272 | return NULL; |
1da177e4 | 273 | read_lock_bh(&idev->lock); |
96b52e61 ED |
274 | if (idev->dead) { |
275 | read_unlock_bh(&idev->lock); | |
276 | return NULL; | |
277 | } | |
1da177e4 LT |
278 | return idev; |
279 | } | |
280 | ||
281 | void ipv6_sock_mc_close(struct sock *sk) | |
282 | { | |
283 | struct ipv6_pinfo *np = inet6_sk(sk); | |
284 | struct ipv6_mc_socklist *mc_lst; | |
3b1e0a65 | 285 | struct net *net = sock_net(sk); |
1da177e4 | 286 | |
0e1efe9d ED |
287 | if (!rcu_access_pointer(np->ipv6_mc_list)) |
288 | return; | |
289 | ||
a9ed4a29 | 290 | rtnl_lock(); |
b5350916 | 291 | while ((mc_lst = rtnl_dereference(np->ipv6_mc_list)) != NULL) { |
1da177e4 LT |
292 | struct net_device *dev; |
293 | ||
294 | np->ipv6_mc_list = mc_lst->next; | |
1da177e4 | 295 | |
414b6c94 | 296 | dev = __dev_get_by_index(net, mc_lst->ifindex); |
1da177e4 | 297 | if (dev) { |
96b52e61 | 298 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 299 | |
acd6e00b | 300 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 301 | if (idev) |
1da177e4 | 302 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
303 | } else |
304 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
1da177e4 | 305 | |
456b61bc | 306 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 307 | kfree_rcu(mc_lst, rcu); |
456b61bc | 308 | |
1da177e4 | 309 | } |
a9ed4a29 | 310 | rtnl_unlock(); |
1da177e4 LT |
311 | } |
312 | ||
313 | int ip6_mc_source(int add, int omode, struct sock *sk, | |
314 | struct group_source_req *pgsr) | |
315 | { | |
316 | struct in6_addr *source, *group; | |
317 | struct ipv6_mc_socklist *pmc; | |
1da177e4 LT |
318 | struct inet6_dev *idev; |
319 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
320 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 321 | struct net *net = sock_net(sk); |
1da177e4 | 322 | int i, j, rv; |
c9e3e8b6 | 323 | int leavegroup = 0; |
5ab4a6c8 | 324 | int pmclocked = 0; |
1da177e4 LT |
325 | int err; |
326 | ||
1da177e4 LT |
327 | source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr; |
328 | group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr; | |
329 | ||
330 | if (!ipv6_addr_is_multicast(group)) | |
331 | return -EINVAL; | |
332 | ||
96b52e61 ED |
333 | rcu_read_lock(); |
334 | idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface); | |
335 | if (!idev) { | |
336 | rcu_read_unlock(); | |
1da177e4 | 337 | return -ENODEV; |
96b52e61 | 338 | } |
1da177e4 LT |
339 | |
340 | err = -EADDRNOTAVAIL; | |
341 | ||
456b61bc | 342 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
343 | if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface) |
344 | continue; | |
345 | if (ipv6_addr_equal(&pmc->addr, group)) | |
346 | break; | |
347 | } | |
917f2f10 DS |
348 | if (!pmc) { /* must have a prior join */ |
349 | err = -EINVAL; | |
1da177e4 | 350 | goto done; |
917f2f10 | 351 | } |
1da177e4 LT |
352 | /* if a source filter was set, must be the same mode as before */ |
353 | if (pmc->sflist) { | |
917f2f10 DS |
354 | if (pmc->sfmode != omode) { |
355 | err = -EINVAL; | |
1da177e4 | 356 | goto done; |
917f2f10 | 357 | } |
1da177e4 LT |
358 | } else if (pmc->sfmode != omode) { |
359 | /* allow mode switches for empty-set filters */ | |
360 | ip6_mc_add_src(idev, group, omode, 0, NULL, 0); | |
361 | ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
362 | pmc->sfmode = omode; | |
363 | } | |
364 | ||
96b52e61 | 365 | write_lock(&pmc->sflock); |
5ab4a6c8 DS |
366 | pmclocked = 1; |
367 | ||
1da177e4 LT |
368 | psl = pmc->sflist; |
369 | if (!add) { | |
370 | if (!psl) | |
917f2f10 | 371 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 372 | rv = !0; |
67ba4152 | 373 | for (i = 0; i < psl->sl_count; i++) { |
07c2fecc | 374 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
1da177e4 LT |
375 | if (rv == 0) |
376 | break; | |
377 | } | |
378 | if (rv) /* source not found */ | |
917f2f10 | 379 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 380 | |
c9e3e8b6 DS |
381 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
382 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { | |
383 | leavegroup = 1; | |
384 | goto done; | |
385 | } | |
386 | ||
1da177e4 LT |
387 | /* update the interface filter */ |
388 | ip6_mc_del_src(idev, group, omode, 1, source, 1); | |
389 | ||
67ba4152 | 390 | for (j = i+1; j < psl->sl_count; j++) |
1da177e4 LT |
391 | psl->sl_addr[j-1] = psl->sl_addr[j]; |
392 | psl->sl_count--; | |
393 | err = 0; | |
394 | goto done; | |
395 | } | |
396 | /* else, add a new source to the filter */ | |
397 | ||
398 | if (psl && psl->sl_count >= sysctl_mld_max_msf) { | |
399 | err = -ENOBUFS; | |
400 | goto done; | |
401 | } | |
402 | if (!psl || psl->sl_count == psl->sl_max) { | |
403 | struct ip6_sf_socklist *newpsl; | |
404 | int count = IP6_SFBLOCK; | |
405 | ||
406 | if (psl) | |
407 | count += psl->sl_max; | |
8b3a7005 | 408 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC); |
1da177e4 LT |
409 | if (!newpsl) { |
410 | err = -ENOBUFS; | |
411 | goto done; | |
412 | } | |
413 | newpsl->sl_max = count; | |
414 | newpsl->sl_count = count - IP6_SFBLOCK; | |
415 | if (psl) { | |
67ba4152 | 416 | for (i = 0; i < psl->sl_count; i++) |
1da177e4 LT |
417 | newpsl->sl_addr[i] = psl->sl_addr[i]; |
418 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
419 | } | |
420 | pmc->sflist = psl = newpsl; | |
421 | } | |
422 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ | |
67ba4152 | 423 | for (i = 0; i < psl->sl_count; i++) { |
07c2fecc | 424 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
56db1c5f JS |
425 | if (rv == 0) /* There is an error in the address. */ |
426 | goto done; | |
1da177e4 | 427 | } |
67ba4152 | 428 | for (j = psl->sl_count-1; j >= i; j--) |
1da177e4 LT |
429 | psl->sl_addr[j+1] = psl->sl_addr[j]; |
430 | psl->sl_addr[i] = *source; | |
431 | psl->sl_count++; | |
432 | err = 0; | |
433 | /* update the interface list */ | |
434 | ip6_mc_add_src(idev, group, omode, 1, source, 1); | |
435 | done: | |
5ab4a6c8 | 436 | if (pmclocked) |
96b52e61 | 437 | write_unlock(&pmc->sflock); |
1da177e4 | 438 | read_unlock_bh(&idev->lock); |
96b52e61 | 439 | rcu_read_unlock(); |
c9e3e8b6 DS |
440 | if (leavegroup) |
441 | return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group); | |
1da177e4 LT |
442 | return err; |
443 | } | |
444 | ||
445 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) | |
446 | { | |
b71d1d42 | 447 | const struct in6_addr *group; |
1da177e4 | 448 | struct ipv6_mc_socklist *pmc; |
1da177e4 LT |
449 | struct inet6_dev *idev; |
450 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
451 | struct ip6_sf_socklist *newpsl, *psl; | |
3b1e0a65 | 452 | struct net *net = sock_net(sk); |
9951f036 | 453 | int leavegroup = 0; |
1da177e4 LT |
454 | int i, err; |
455 | ||
456 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
457 | ||
458 | if (!ipv6_addr_is_multicast(group)) | |
459 | return -EINVAL; | |
460 | if (gsf->gf_fmode != MCAST_INCLUDE && | |
461 | gsf->gf_fmode != MCAST_EXCLUDE) | |
462 | return -EINVAL; | |
463 | ||
96b52e61 ED |
464 | rcu_read_lock(); |
465 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 466 | |
96b52e61 ED |
467 | if (!idev) { |
468 | rcu_read_unlock(); | |
1da177e4 | 469 | return -ENODEV; |
96b52e61 | 470 | } |
1da177e4 | 471 | |
9c05989b | 472 | err = 0; |
5ab4a6c8 | 473 | |
9951f036 DS |
474 | if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) { |
475 | leavegroup = 1; | |
476 | goto done; | |
477 | } | |
478 | ||
456b61bc | 479 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
480 | if (pmc->ifindex != gsf->gf_interface) |
481 | continue; | |
482 | if (ipv6_addr_equal(&pmc->addr, group)) | |
483 | break; | |
484 | } | |
917f2f10 DS |
485 | if (!pmc) { /* must have a prior join */ |
486 | err = -EINVAL; | |
1da177e4 | 487 | goto done; |
917f2f10 | 488 | } |
1da177e4 | 489 | if (gsf->gf_numsrc) { |
8b3a7005 KK |
490 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc), |
491 | GFP_ATOMIC); | |
1da177e4 LT |
492 | if (!newpsl) { |
493 | err = -ENOBUFS; | |
494 | goto done; | |
495 | } | |
496 | newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc; | |
67ba4152 | 497 | for (i = 0; i < newpsl->sl_count; ++i) { |
1da177e4 LT |
498 | struct sockaddr_in6 *psin6; |
499 | ||
500 | psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i]; | |
501 | newpsl->sl_addr[i] = psin6->sin6_addr; | |
502 | } | |
503 | err = ip6_mc_add_src(idev, group, gsf->gf_fmode, | |
504 | newpsl->sl_count, newpsl->sl_addr, 0); | |
505 | if (err) { | |
506 | sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); | |
507 | goto done; | |
508 | } | |
8713dbf0 | 509 | } else { |
1da177e4 | 510 | newpsl = NULL; |
8713dbf0 YZ |
511 | (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); |
512 | } | |
5ab4a6c8 | 513 | |
96b52e61 | 514 | write_lock(&pmc->sflock); |
1da177e4 LT |
515 | psl = pmc->sflist; |
516 | if (psl) { | |
517 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, | |
518 | psl->sl_count, psl->sl_addr, 0); | |
519 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
520 | } else | |
521 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
522 | pmc->sflist = newpsl; | |
523 | pmc->sfmode = gsf->gf_fmode; | |
96b52e61 | 524 | write_unlock(&pmc->sflock); |
917f2f10 | 525 | err = 0; |
1da177e4 LT |
526 | done: |
527 | read_unlock_bh(&idev->lock); | |
96b52e61 | 528 | rcu_read_unlock(); |
9951f036 DS |
529 | if (leavegroup) |
530 | err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group); | |
1da177e4 LT |
531 | return err; |
532 | } | |
533 | ||
534 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
535 | struct group_filter __user *optval, int __user *optlen) | |
536 | { | |
537 | int err, i, count, copycount; | |
b71d1d42 | 538 | const struct in6_addr *group; |
1da177e4 LT |
539 | struct ipv6_mc_socklist *pmc; |
540 | struct inet6_dev *idev; | |
1da177e4 LT |
541 | struct ipv6_pinfo *inet6 = inet6_sk(sk); |
542 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 543 | struct net *net = sock_net(sk); |
1da177e4 LT |
544 | |
545 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
546 | ||
547 | if (!ipv6_addr_is_multicast(group)) | |
548 | return -EINVAL; | |
549 | ||
96b52e61 ED |
550 | rcu_read_lock(); |
551 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 552 | |
96b52e61 ED |
553 | if (!idev) { |
554 | rcu_read_unlock(); | |
1da177e4 | 555 | return -ENODEV; |
96b52e61 | 556 | } |
1da177e4 LT |
557 | |
558 | err = -EADDRNOTAVAIL; | |
f7ed925c WC |
559 | /* changes to the ipv6_mc_list require the socket lock and |
560 | * rtnl lock. We have the socket lock and rcu read lock, | |
5ab4a6c8 DS |
561 | * so reading the list is safe. |
562 | */ | |
1da177e4 | 563 | |
456b61bc | 564 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
565 | if (pmc->ifindex != gsf->gf_interface) |
566 | continue; | |
567 | if (ipv6_addr_equal(group, &pmc->addr)) | |
568 | break; | |
569 | } | |
570 | if (!pmc) /* must have a prior join */ | |
571 | goto done; | |
572 | gsf->gf_fmode = pmc->sfmode; | |
573 | psl = pmc->sflist; | |
574 | count = psl ? psl->sl_count : 0; | |
575 | read_unlock_bh(&idev->lock); | |
96b52e61 | 576 | rcu_read_unlock(); |
1da177e4 LT |
577 | |
578 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; | |
579 | gsf->gf_numsrc = count; | |
580 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || | |
581 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { | |
582 | return -EFAULT; | |
583 | } | |
f7ed925c WC |
584 | /* changes to psl require the socket lock, and a write lock |
585 | * on pmc->sflock. We have the socket lock so reading here is safe. | |
5ab4a6c8 | 586 | */ |
67ba4152 | 587 | for (i = 0; i < copycount; i++) { |
1da177e4 LT |
588 | struct sockaddr_in6 *psin6; |
589 | struct sockaddr_storage ss; | |
590 | ||
591 | psin6 = (struct sockaddr_in6 *)&ss; | |
592 | memset(&ss, 0, sizeof(ss)); | |
593 | psin6->sin6_family = AF_INET6; | |
594 | psin6->sin6_addr = psl->sl_addr[i]; | |
1ab1457c | 595 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) |
1da177e4 LT |
596 | return -EFAULT; |
597 | } | |
598 | return 0; | |
599 | done: | |
600 | read_unlock_bh(&idev->lock); | |
96b52e61 | 601 | rcu_read_unlock(); |
1da177e4 LT |
602 | return err; |
603 | } | |
604 | ||
a50feda5 ED |
605 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, |
606 | const struct in6_addr *src_addr) | |
1da177e4 LT |
607 | { |
608 | struct ipv6_pinfo *np = inet6_sk(sk); | |
609 | struct ipv6_mc_socklist *mc; | |
610 | struct ip6_sf_socklist *psl; | |
a50feda5 | 611 | bool rv = true; |
1da177e4 | 612 | |
456b61bc ED |
613 | rcu_read_lock(); |
614 | for_each_pmc_rcu(np, mc) { | |
1da177e4 LT |
615 | if (ipv6_addr_equal(&mc->addr, mc_addr)) |
616 | break; | |
617 | } | |
618 | if (!mc) { | |
456b61bc | 619 | rcu_read_unlock(); |
a50feda5 | 620 | return true; |
1da177e4 | 621 | } |
5ab4a6c8 | 622 | read_lock(&mc->sflock); |
1da177e4 LT |
623 | psl = mc->sflist; |
624 | if (!psl) { | |
625 | rv = mc->sfmode == MCAST_EXCLUDE; | |
626 | } else { | |
627 | int i; | |
628 | ||
67ba4152 | 629 | for (i = 0; i < psl->sl_count; i++) { |
1da177e4 LT |
630 | if (ipv6_addr_equal(&psl->sl_addr[i], src_addr)) |
631 | break; | |
632 | } | |
633 | if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) | |
a50feda5 | 634 | rv = false; |
1da177e4 | 635 | if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) |
a50feda5 | 636 | rv = false; |
1da177e4 | 637 | } |
5ab4a6c8 | 638 | read_unlock(&mc->sflock); |
456b61bc | 639 | rcu_read_unlock(); |
1da177e4 LT |
640 | |
641 | return rv; | |
642 | } | |
643 | ||
1da177e4 LT |
644 | static void igmp6_group_added(struct ifmcaddr6 *mc) |
645 | { | |
646 | struct net_device *dev = mc->idev->dev; | |
647 | char buf[MAX_ADDR_LEN]; | |
648 | ||
ec16ef22 YH |
649 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
650 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
651 | return; | |
652 | ||
1da177e4 LT |
653 | spin_lock_bh(&mc->mca_lock); |
654 | if (!(mc->mca_flags&MAF_LOADED)) { | |
655 | mc->mca_flags |= MAF_LOADED; | |
656 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 657 | dev_mc_add(dev, buf); |
1da177e4 LT |
658 | } |
659 | spin_unlock_bh(&mc->mca_lock); | |
660 | ||
661 | if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT)) | |
662 | return; | |
663 | ||
6c567b78 | 664 | if (mld_in_v1_mode(mc->idev)) { |
1da177e4 LT |
665 | igmp6_join_group(mc); |
666 | return; | |
667 | } | |
668 | /* else v2 */ | |
669 | ||
670 | mc->mca_crcount = mc->idev->mc_qrv; | |
671 | mld_ifc_event(mc->idev); | |
672 | } | |
673 | ||
674 | static void igmp6_group_dropped(struct ifmcaddr6 *mc) | |
675 | { | |
676 | struct net_device *dev = mc->idev->dev; | |
677 | char buf[MAX_ADDR_LEN]; | |
678 | ||
ec16ef22 YH |
679 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
680 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
681 | return; | |
682 | ||
1da177e4 LT |
683 | spin_lock_bh(&mc->mca_lock); |
684 | if (mc->mca_flags&MAF_LOADED) { | |
685 | mc->mca_flags &= ~MAF_LOADED; | |
686 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 687 | dev_mc_del(dev, buf); |
1da177e4 LT |
688 | } |
689 | ||
690 | if (mc->mca_flags & MAF_NOREPORT) | |
691 | goto done; | |
692 | spin_unlock_bh(&mc->mca_lock); | |
693 | ||
694 | if (!mc->idev->dead) | |
695 | igmp6_leave_group(mc); | |
696 | ||
697 | spin_lock_bh(&mc->mca_lock); | |
698 | if (del_timer(&mc->mca_timer)) | |
699 | atomic_dec(&mc->mca_refcnt); | |
700 | done: | |
701 | ip6_mc_clear_src(mc); | |
702 | spin_unlock_bh(&mc->mca_lock); | |
703 | } | |
704 | ||
705 | /* | |
706 | * deleted ifmcaddr6 manipulation | |
707 | */ | |
708 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) | |
709 | { | |
710 | struct ifmcaddr6 *pmc; | |
711 | ||
712 | /* this is an "ifmcaddr6" for convenience; only the fields below | |
713 | * are actually used. In particular, the refcnt and users are not | |
714 | * used for management of the delete list. Using the same structure | |
715 | * for deleted items allows change reports to use common code with | |
716 | * non-deleted or query-response MCA's. | |
717 | */ | |
0c600eda | 718 | pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC); |
1da177e4 LT |
719 | if (!pmc) |
720 | return; | |
0c600eda | 721 | |
1da177e4 LT |
722 | spin_lock_bh(&im->mca_lock); |
723 | spin_lock_init(&pmc->mca_lock); | |
724 | pmc->idev = im->idev; | |
725 | in6_dev_hold(idev); | |
726 | pmc->mca_addr = im->mca_addr; | |
727 | pmc->mca_crcount = idev->mc_qrv; | |
728 | pmc->mca_sfmode = im->mca_sfmode; | |
729 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
730 | struct ip6_sf_list *psf; | |
731 | ||
732 | pmc->mca_tomb = im->mca_tomb; | |
733 | pmc->mca_sources = im->mca_sources; | |
734 | im->mca_tomb = im->mca_sources = NULL; | |
67ba4152 | 735 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
736 | psf->sf_crcount = pmc->mca_crcount; |
737 | } | |
738 | spin_unlock_bh(&im->mca_lock); | |
739 | ||
6457d26b | 740 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
741 | pmc->next = idev->mc_tomb; |
742 | idev->mc_tomb = pmc; | |
6457d26b | 743 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
744 | } |
745 | ||
b71d1d42 | 746 | static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *pmca) |
1da177e4 LT |
747 | { |
748 | struct ifmcaddr6 *pmc, *pmc_prev; | |
749 | struct ip6_sf_list *psf, *psf_next; | |
750 | ||
6457d26b | 751 | spin_lock_bh(&idev->mc_lock); |
1da177e4 | 752 | pmc_prev = NULL; |
67ba4152 | 753 | for (pmc = idev->mc_tomb; pmc; pmc = pmc->next) { |
1da177e4 LT |
754 | if (ipv6_addr_equal(&pmc->mca_addr, pmca)) |
755 | break; | |
756 | pmc_prev = pmc; | |
757 | } | |
758 | if (pmc) { | |
759 | if (pmc_prev) | |
760 | pmc_prev->next = pmc->next; | |
761 | else | |
762 | idev->mc_tomb = pmc->next; | |
763 | } | |
6457d26b SH |
764 | spin_unlock_bh(&idev->mc_lock); |
765 | ||
1da177e4 | 766 | if (pmc) { |
67ba4152 | 767 | for (psf = pmc->mca_tomb; psf; psf = psf_next) { |
1da177e4 LT |
768 | psf_next = psf->sf_next; |
769 | kfree(psf); | |
770 | } | |
771 | in6_dev_put(pmc->idev); | |
772 | kfree(pmc); | |
773 | } | |
774 | } | |
775 | ||
776 | static void mld_clear_delrec(struct inet6_dev *idev) | |
777 | { | |
778 | struct ifmcaddr6 *pmc, *nextpmc; | |
779 | ||
6457d26b | 780 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
781 | pmc = idev->mc_tomb; |
782 | idev->mc_tomb = NULL; | |
6457d26b | 783 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
784 | |
785 | for (; pmc; pmc = nextpmc) { | |
786 | nextpmc = pmc->next; | |
787 | ip6_mc_clear_src(pmc); | |
788 | in6_dev_put(pmc->idev); | |
789 | kfree(pmc); | |
790 | } | |
791 | ||
792 | /* clear dead sources, too */ | |
793 | read_lock_bh(&idev->lock); | |
67ba4152 | 794 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
795 | struct ip6_sf_list *psf, *psf_next; |
796 | ||
797 | spin_lock_bh(&pmc->mca_lock); | |
798 | psf = pmc->mca_tomb; | |
799 | pmc->mca_tomb = NULL; | |
800 | spin_unlock_bh(&pmc->mca_lock); | |
67ba4152 | 801 | for (; psf; psf = psf_next) { |
1da177e4 LT |
802 | psf_next = psf->sf_next; |
803 | kfree(psf); | |
804 | } | |
805 | } | |
806 | read_unlock_bh(&idev->lock); | |
807 | } | |
808 | ||
1691c63e WC |
809 | static void mca_get(struct ifmcaddr6 *mc) |
810 | { | |
811 | atomic_inc(&mc->mca_refcnt); | |
812 | } | |
813 | ||
814 | static void ma_put(struct ifmcaddr6 *mc) | |
815 | { | |
816 | if (atomic_dec_and_test(&mc->mca_refcnt)) { | |
817 | in6_dev_put(mc->idev); | |
818 | kfree(mc); | |
819 | } | |
820 | } | |
821 | ||
822 | static struct ifmcaddr6 *mca_alloc(struct inet6_dev *idev, | |
823 | const struct in6_addr *addr) | |
824 | { | |
825 | struct ifmcaddr6 *mc; | |
826 | ||
827 | mc = kzalloc(sizeof(*mc), GFP_ATOMIC); | |
828 | if (mc == NULL) | |
829 | return NULL; | |
830 | ||
831 | setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc); | |
832 | ||
833 | mc->mca_addr = *addr; | |
834 | mc->idev = idev; /* reference taken by caller */ | |
835 | mc->mca_users = 1; | |
836 | /* mca_stamp should be updated upon changes */ | |
837 | mc->mca_cstamp = mc->mca_tstamp = jiffies; | |
838 | atomic_set(&mc->mca_refcnt, 1); | |
839 | spin_lock_init(&mc->mca_lock); | |
840 | ||
841 | /* initial mode is (EX, empty) */ | |
842 | mc->mca_sfmode = MCAST_EXCLUDE; | |
843 | mc->mca_sfcount[MCAST_EXCLUDE] = 1; | |
844 | ||
845 | if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) || | |
846 | IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
847 | mc->mca_flags |= MAF_NOREPORT; | |
848 | ||
849 | return mc; | |
850 | } | |
1da177e4 LT |
851 | |
852 | /* | |
853 | * device multicast group inc (add if not found) | |
854 | */ | |
9acd9f3a | 855 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
856 | { |
857 | struct ifmcaddr6 *mc; | |
858 | struct inet6_dev *idev; | |
859 | ||
a9ed4a29 SD |
860 | ASSERT_RTNL(); |
861 | ||
96b52e61 | 862 | /* we need to take a reference on idev */ |
1da177e4 LT |
863 | idev = in6_dev_get(dev); |
864 | ||
865 | if (idev == NULL) | |
866 | return -EINVAL; | |
867 | ||
868 | write_lock_bh(&idev->lock); | |
869 | if (idev->dead) { | |
870 | write_unlock_bh(&idev->lock); | |
871 | in6_dev_put(idev); | |
872 | return -ENODEV; | |
873 | } | |
874 | ||
875 | for (mc = idev->mc_list; mc; mc = mc->next) { | |
876 | if (ipv6_addr_equal(&mc->mca_addr, addr)) { | |
877 | mc->mca_users++; | |
878 | write_unlock_bh(&idev->lock); | |
879 | ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0, | |
880 | NULL, 0); | |
881 | in6_dev_put(idev); | |
882 | return 0; | |
883 | } | |
884 | } | |
885 | ||
1691c63e WC |
886 | mc = mca_alloc(idev, addr); |
887 | if (!mc) { | |
1da177e4 LT |
888 | write_unlock_bh(&idev->lock); |
889 | in6_dev_put(idev); | |
890 | return -ENOMEM; | |
891 | } | |
892 | ||
1da177e4 LT |
893 | mc->next = idev->mc_list; |
894 | idev->mc_list = mc; | |
1691c63e WC |
895 | |
896 | /* Hold this for the code below before we unlock, | |
897 | * it is already exposed via idev->mc_list. | |
898 | */ | |
899 | mca_get(mc); | |
1da177e4 LT |
900 | write_unlock_bh(&idev->lock); |
901 | ||
902 | mld_del_delrec(idev, &mc->mca_addr); | |
903 | igmp6_group_added(mc); | |
904 | ma_put(mc); | |
905 | return 0; | |
906 | } | |
907 | ||
908 | /* | |
909 | * device multicast group del | |
910 | */ | |
9acd9f3a | 911 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
912 | { |
913 | struct ifmcaddr6 *ma, **map; | |
914 | ||
a9ed4a29 SD |
915 | ASSERT_RTNL(); |
916 | ||
1da177e4 | 917 | write_lock_bh(&idev->lock); |
67ba4152 | 918 | for (map = &idev->mc_list; (ma = *map) != NULL; map = &ma->next) { |
1da177e4 LT |
919 | if (ipv6_addr_equal(&ma->mca_addr, addr)) { |
920 | if (--ma->mca_users == 0) { | |
921 | *map = ma->next; | |
922 | write_unlock_bh(&idev->lock); | |
923 | ||
924 | igmp6_group_dropped(ma); | |
925 | ||
926 | ma_put(ma); | |
927 | return 0; | |
928 | } | |
929 | write_unlock_bh(&idev->lock); | |
930 | return 0; | |
931 | } | |
932 | } | |
933 | write_unlock_bh(&idev->lock); | |
934 | ||
935 | return -ENOENT; | |
936 | } | |
937 | ||
9acd9f3a | 938 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 | 939 | { |
96b52e61 | 940 | struct inet6_dev *idev; |
1da177e4 LT |
941 | int err; |
942 | ||
414b6c94 | 943 | ASSERT_RTNL(); |
1da177e4 | 944 | |
96b52e61 ED |
945 | idev = __in6_dev_get(dev); |
946 | if (!idev) | |
947 | err = -ENODEV; | |
948 | else | |
949 | err = __ipv6_dev_mc_dec(idev, addr); | |
1da177e4 LT |
950 | |
951 | return err; | |
952 | } | |
953 | ||
1da177e4 LT |
954 | /* |
955 | * check if the interface/address pair is valid | |
956 | */ | |
a50feda5 ED |
957 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, |
958 | const struct in6_addr *src_addr) | |
1da177e4 LT |
959 | { |
960 | struct inet6_dev *idev; | |
961 | struct ifmcaddr6 *mc; | |
a50feda5 | 962 | bool rv = false; |
1da177e4 | 963 | |
96b52e61 ED |
964 | rcu_read_lock(); |
965 | idev = __in6_dev_get(dev); | |
1da177e4 LT |
966 | if (idev) { |
967 | read_lock_bh(&idev->lock); | |
67ba4152 | 968 | for (mc = idev->mc_list; mc; mc = mc->next) { |
1da177e4 LT |
969 | if (ipv6_addr_equal(&mc->mca_addr, group)) |
970 | break; | |
971 | } | |
972 | if (mc) { | |
973 | if (src_addr && !ipv6_addr_any(src_addr)) { | |
974 | struct ip6_sf_list *psf; | |
975 | ||
976 | spin_lock_bh(&mc->mca_lock); | |
67ba4152 | 977 | for (psf = mc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
978 | if (ipv6_addr_equal(&psf->sf_addr, src_addr)) |
979 | break; | |
980 | } | |
981 | if (psf) | |
982 | rv = psf->sf_count[MCAST_INCLUDE] || | |
983 | psf->sf_count[MCAST_EXCLUDE] != | |
984 | mc->mca_sfcount[MCAST_EXCLUDE]; | |
985 | else | |
67ba4152 | 986 | rv = mc->mca_sfcount[MCAST_EXCLUDE] != 0; |
1da177e4 LT |
987 | spin_unlock_bh(&mc->mca_lock); |
988 | } else | |
a50feda5 | 989 | rv = true; /* don't filter unspecified source */ |
1da177e4 LT |
990 | } |
991 | read_unlock_bh(&idev->lock); | |
1da177e4 | 992 | } |
96b52e61 | 993 | rcu_read_unlock(); |
1da177e4 LT |
994 | return rv; |
995 | } | |
996 | ||
997 | static void mld_gq_start_timer(struct inet6_dev *idev) | |
998 | { | |
63862b5b | 999 | unsigned long tv = prandom_u32() % idev->mc_maxdelay; |
1da177e4 LT |
1000 | |
1001 | idev->mc_gq_running = 1; | |
1002 | if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2)) | |
1003 | in6_dev_hold(idev); | |
1004 | } | |
1005 | ||
b4af8def DB |
1006 | static void mld_gq_stop_timer(struct inet6_dev *idev) |
1007 | { | |
1008 | idev->mc_gq_running = 0; | |
1009 | if (del_timer(&idev->mc_gq_timer)) | |
1010 | __in6_dev_put(idev); | |
1011 | } | |
1012 | ||
c2cef4e8 | 1013 | static void mld_ifc_start_timer(struct inet6_dev *idev, unsigned long delay) |
1da177e4 | 1014 | { |
63862b5b | 1015 | unsigned long tv = prandom_u32() % delay; |
1da177e4 LT |
1016 | |
1017 | if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2)) | |
1018 | in6_dev_hold(idev); | |
1019 | } | |
1020 | ||
b4af8def DB |
1021 | static void mld_ifc_stop_timer(struct inet6_dev *idev) |
1022 | { | |
1023 | idev->mc_ifc_count = 0; | |
1024 | if (del_timer(&idev->mc_ifc_timer)) | |
1025 | __in6_dev_put(idev); | |
1026 | } | |
1027 | ||
c2cef4e8 | 1028 | static void mld_dad_start_timer(struct inet6_dev *idev, unsigned long delay) |
b173ee48 | 1029 | { |
63862b5b | 1030 | unsigned long tv = prandom_u32() % delay; |
b173ee48 HFS |
1031 | |
1032 | if (!mod_timer(&idev->mc_dad_timer, jiffies+tv+2)) | |
1033 | in6_dev_hold(idev); | |
1034 | } | |
1035 | ||
b4af8def DB |
1036 | static void mld_dad_stop_timer(struct inet6_dev *idev) |
1037 | { | |
1038 | if (del_timer(&idev->mc_dad_timer)) | |
1039 | __in6_dev_put(idev); | |
1040 | } | |
1041 | ||
1da177e4 LT |
1042 | /* |
1043 | * IGMP handling (alias multicast ICMPv6 messages) | |
1044 | */ | |
1045 | ||
1046 | static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) | |
1047 | { | |
1048 | unsigned long delay = resptime; | |
1049 | ||
1050 | /* Do not start timer for these addresses */ | |
1051 | if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) || | |
1052 | IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
1053 | return; | |
1054 | ||
1055 | if (del_timer(&ma->mca_timer)) { | |
1056 | atomic_dec(&ma->mca_refcnt); | |
1057 | delay = ma->mca_timer.expires - jiffies; | |
1058 | } | |
1059 | ||
cc7f7ab7 | 1060 | if (delay >= resptime) |
63862b5b | 1061 | delay = prandom_u32() % resptime; |
cc7f7ab7 | 1062 | |
1da177e4 LT |
1063 | ma->mca_timer.expires = jiffies + delay; |
1064 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
1065 | atomic_inc(&ma->mca_refcnt); | |
1066 | ma->mca_flags |= MAF_TIMER_RUNNING; | |
1067 | } | |
1068 | ||
5ab4a6c8 | 1069 | /* mark EXCLUDE-mode sources */ |
a50feda5 ED |
1070 | static bool mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs, |
1071 | const struct in6_addr *srcs) | |
1da177e4 LT |
1072 | { |
1073 | struct ip6_sf_list *psf; | |
1074 | int i, scount; | |
1075 | ||
1076 | scount = 0; | |
67ba4152 | 1077 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1078 | if (scount == nsrcs) |
1079 | break; | |
67ba4152 | 1080 | for (i = 0; i < nsrcs; i++) { |
5ab4a6c8 | 1081 | /* skip inactive filters */ |
e05c4ad3 | 1082 | if (psf->sf_count[MCAST_INCLUDE] || |
5ab4a6c8 DS |
1083 | pmc->mca_sfcount[MCAST_EXCLUDE] != |
1084 | psf->sf_count[MCAST_EXCLUDE]) | |
ce713ee5 | 1085 | break; |
5ab4a6c8 DS |
1086 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1087 | scount++; | |
1088 | break; | |
1089 | } | |
1090 | } | |
1091 | } | |
1092 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1093 | if (scount == nsrcs) /* all sources excluded */ | |
a50feda5 ED |
1094 | return false; |
1095 | return true; | |
5ab4a6c8 DS |
1096 | } |
1097 | ||
a50feda5 ED |
1098 | static bool mld_marksources(struct ifmcaddr6 *pmc, int nsrcs, |
1099 | const struct in6_addr *srcs) | |
5ab4a6c8 DS |
1100 | { |
1101 | struct ip6_sf_list *psf; | |
1102 | int i, scount; | |
1103 | ||
1104 | if (pmc->mca_sfmode == MCAST_EXCLUDE) | |
1105 | return mld_xmarksources(pmc, nsrcs, srcs); | |
1106 | ||
1107 | /* mark INCLUDE-mode sources */ | |
1108 | ||
1109 | scount = 0; | |
67ba4152 | 1110 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
5ab4a6c8 DS |
1111 | if (scount == nsrcs) |
1112 | break; | |
67ba4152 | 1113 | for (i = 0; i < nsrcs; i++) { |
1da177e4 LT |
1114 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1115 | psf->sf_gsresp = 1; | |
1116 | scount++; | |
1117 | break; | |
1118 | } | |
5ab4a6c8 DS |
1119 | } |
1120 | } | |
1121 | if (!scount) { | |
1122 | pmc->mca_flags &= ~MAF_GSQUERY; | |
a50feda5 | 1123 | return false; |
1da177e4 | 1124 | } |
5ab4a6c8 | 1125 | pmc->mca_flags |= MAF_GSQUERY; |
a50feda5 | 1126 | return true; |
1da177e4 LT |
1127 | } |
1128 | ||
58c0ecfd DB |
1129 | static int mld_force_mld_version(const struct inet6_dev *idev) |
1130 | { | |
1131 | /* Normally, both are 0 here. If enforcement to a particular is | |
1132 | * being used, individual device enforcement will have a lower | |
1133 | * precedence over 'all' device (.../conf/all/force_mld_version). | |
1134 | */ | |
1135 | ||
1136 | if (dev_net(idev->dev)->ipv6.devconf_all->force_mld_version != 0) | |
1137 | return dev_net(idev->dev)->ipv6.devconf_all->force_mld_version; | |
1138 | else | |
1139 | return idev->cnf.force_mld_version; | |
1140 | } | |
1141 | ||
1142 | static bool mld_in_v2_mode_only(const struct inet6_dev *idev) | |
1143 | { | |
1144 | return mld_force_mld_version(idev) == 2; | |
1145 | } | |
1146 | ||
1147 | static bool mld_in_v1_mode_only(const struct inet6_dev *idev) | |
1148 | { | |
1149 | return mld_force_mld_version(idev) == 1; | |
1150 | } | |
1151 | ||
6c567b78 DB |
1152 | static bool mld_in_v1_mode(const struct inet6_dev *idev) |
1153 | { | |
58c0ecfd DB |
1154 | if (mld_in_v2_mode_only(idev)) |
1155 | return false; | |
1156 | if (mld_in_v1_mode_only(idev)) | |
6c567b78 DB |
1157 | return true; |
1158 | if (idev->mc_v1_seen && time_before(jiffies, idev->mc_v1_seen)) | |
1159 | return true; | |
1160 | ||
1161 | return false; | |
1162 | } | |
1163 | ||
89225d1c DB |
1164 | static void mld_set_v1_mode(struct inet6_dev *idev) |
1165 | { | |
1166 | /* RFC3810, relevant sections: | |
1167 | * - 9.1. Robustness Variable | |
1168 | * - 9.2. Query Interval | |
1169 | * - 9.3. Query Response Interval | |
1170 | * - 9.12. Older Version Querier Present Timeout | |
1171 | */ | |
1172 | unsigned long switchback; | |
1173 | ||
1174 | switchback = (idev->mc_qrv * idev->mc_qi) + idev->mc_qri; | |
1175 | ||
1176 | idev->mc_v1_seen = jiffies + switchback; | |
1177 | } | |
1178 | ||
1179 | static void mld_update_qrv(struct inet6_dev *idev, | |
1180 | const struct mld2_query *mlh2) | |
1181 | { | |
1182 | /* RFC3810, relevant sections: | |
1183 | * - 5.1.8. QRV (Querier's Robustness Variable) | |
1184 | * - 9.1. Robustness Variable | |
1185 | */ | |
1186 | ||
1187 | /* The value of the Robustness Variable MUST NOT be zero, | |
1188 | * and SHOULD NOT be one. Catch this here if we ever run | |
1189 | * into such a case in future. | |
1190 | */ | |
2f711939 | 1191 | const int min_qrv = min(MLD_QRV_DEFAULT, sysctl_mld_qrv); |
89225d1c DB |
1192 | WARN_ON(idev->mc_qrv == 0); |
1193 | ||
1194 | if (mlh2->mld2q_qrv > 0) | |
1195 | idev->mc_qrv = mlh2->mld2q_qrv; | |
1196 | ||
2f711939 | 1197 | if (unlikely(idev->mc_qrv < min_qrv)) { |
89225d1c | 1198 | net_warn_ratelimited("IPv6: MLD: clamping QRV from %u to %u!\n", |
2f711939 HFS |
1199 | idev->mc_qrv, min_qrv); |
1200 | idev->mc_qrv = min_qrv; | |
89225d1c DB |
1201 | } |
1202 | } | |
1203 | ||
1204 | static void mld_update_qi(struct inet6_dev *idev, | |
1205 | const struct mld2_query *mlh2) | |
1206 | { | |
1207 | /* RFC3810, relevant sections: | |
1208 | * - 5.1.9. QQIC (Querier's Query Interval Code) | |
1209 | * - 9.2. Query Interval | |
1210 | * - 9.12. Older Version Querier Present Timeout | |
1211 | * (the [Query Interval] in the last Query received) | |
1212 | */ | |
1213 | unsigned long mc_qqi; | |
1214 | ||
1215 | if (mlh2->mld2q_qqic < 128) { | |
1216 | mc_qqi = mlh2->mld2q_qqic; | |
1217 | } else { | |
1218 | unsigned long mc_man, mc_exp; | |
1219 | ||
1220 | mc_exp = MLDV2_QQIC_EXP(mlh2->mld2q_qqic); | |
1221 | mc_man = MLDV2_QQIC_MAN(mlh2->mld2q_qqic); | |
1222 | ||
1223 | mc_qqi = (mc_man | 0x10) << (mc_exp + 3); | |
1224 | } | |
1225 | ||
1226 | idev->mc_qi = mc_qqi * HZ; | |
1227 | } | |
1228 | ||
1229 | static void mld_update_qri(struct inet6_dev *idev, | |
1230 | const struct mld2_query *mlh2) | |
1231 | { | |
1232 | /* RFC3810, relevant sections: | |
1233 | * - 5.1.3. Maximum Response Code | |
1234 | * - 9.3. Query Response Interval | |
1235 | */ | |
e3f5b170 | 1236 | idev->mc_qri = msecs_to_jiffies(mldv2_mrc(mlh2)); |
89225d1c DB |
1237 | } |
1238 | ||
2b7c121f DB |
1239 | static int mld_process_v1(struct inet6_dev *idev, struct mld_msg *mld, |
1240 | unsigned long *max_delay) | |
1241 | { | |
1242 | unsigned long mldv1_md; | |
1243 | ||
1244 | /* Ignore v1 queries */ | |
1245 | if (mld_in_v2_mode_only(idev)) | |
1246 | return -EINVAL; | |
1247 | ||
1248 | /* MLDv1 router present */ | |
1249 | mldv1_md = ntohs(mld->mld_maxdelay); | |
1250 | *max_delay = max(msecs_to_jiffies(mldv1_md), 1UL); | |
1251 | ||
1252 | mld_set_v1_mode(idev); | |
1253 | ||
1254 | /* cancel MLDv2 report timer */ | |
b4af8def | 1255 | mld_gq_stop_timer(idev); |
2b7c121f | 1256 | /* cancel the interface change timer */ |
b4af8def | 1257 | mld_ifc_stop_timer(idev); |
2b7c121f DB |
1258 | /* clear deleted report items */ |
1259 | mld_clear_delrec(idev); | |
1260 | ||
1261 | return 0; | |
1262 | } | |
1263 | ||
1264 | static int mld_process_v2(struct inet6_dev *idev, struct mld2_query *mld, | |
1265 | unsigned long *max_delay) | |
1266 | { | |
1267 | /* hosts need to stay in MLDv1 mode, discard MLDv2 queries */ | |
1268 | if (mld_in_v1_mode(idev)) | |
1269 | return -EINVAL; | |
1270 | ||
1271 | *max_delay = max(msecs_to_jiffies(mldv2_mrc(mld)), 1UL); | |
1272 | ||
1273 | mld_update_qrv(idev, mld); | |
1274 | mld_update_qi(idev, mld); | |
1275 | mld_update_qri(idev, mld); | |
1276 | ||
1277 | idev->mc_maxdelay = *max_delay; | |
1278 | ||
1279 | return 0; | |
1280 | } | |
1281 | ||
96b52e61 | 1282 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1283 | int igmp6_event_query(struct sk_buff *skb) |
1284 | { | |
97300b5f | 1285 | struct mld2_query *mlh2 = NULL; |
1da177e4 | 1286 | struct ifmcaddr6 *ma; |
b71d1d42 | 1287 | const struct in6_addr *group; |
1da177e4 LT |
1288 | unsigned long max_delay; |
1289 | struct inet6_dev *idev; | |
6e7cb837 | 1290 | struct mld_msg *mld; |
1da177e4 LT |
1291 | int group_type; |
1292 | int mark = 0; | |
2b7c121f | 1293 | int len, err; |
1da177e4 LT |
1294 | |
1295 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) | |
1296 | return -EINVAL; | |
1297 | ||
1298 | /* compute payload length excluding extension headers */ | |
0660e03f | 1299 | len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); |
cfe1fc77 | 1300 | len -= skb_network_header_len(skb); |
1da177e4 | 1301 | |
e940f5d6 HL |
1302 | /* RFC3810 6.2 |
1303 | * Upon reception of an MLD message that contains a Query, the node | |
1304 | * checks if the source address of the message is a valid link-local | |
1305 | * address, if the Hop Limit is set to 1, and if the Router Alert | |
1306 | * option is present in the Hop-By-Hop Options header of the IPv6 | |
1307 | * packet. If any of these checks fails, the packet is dropped. | |
1308 | */ | |
1309 | if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL) || | |
1310 | ipv6_hdr(skb)->hop_limit != 1 || | |
1311 | !(IP6CB(skb)->flags & IP6SKB_ROUTERALERT) || | |
1312 | IP6CB(skb)->ra != htons(IPV6_OPT_ROUTERALERT_MLD)) | |
1da177e4 LT |
1313 | return -EINVAL; |
1314 | ||
96b52e61 | 1315 | idev = __in6_dev_get(skb->dev); |
1da177e4 LT |
1316 | if (idev == NULL) |
1317 | return 0; | |
1318 | ||
6e7cb837 YH |
1319 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1320 | group = &mld->mld_mca; | |
1da177e4 LT |
1321 | group_type = ipv6_addr_type(group); |
1322 | ||
1323 | if (group_type != IPV6_ADDR_ANY && | |
96b52e61 | 1324 | !(group_type&IPV6_ADDR_MULTICAST)) |
1da177e4 | 1325 | return -EINVAL; |
1da177e4 | 1326 | |
9fd07841 | 1327 | if (len == MLD_V1_QUERY_LEN) { |
2b7c121f DB |
1328 | err = mld_process_v1(idev, mld, &max_delay); |
1329 | if (err < 0) | |
1330 | return err; | |
9fd07841 | 1331 | } else if (len >= MLD_V2_QUERY_LEN_MIN) { |
1ab1457c | 1332 | int srcs_offset = sizeof(struct mld2_query) - |
97300b5f | 1333 | sizeof(struct icmp6hdr); |
89225d1c | 1334 | |
96b52e61 | 1335 | if (!pskb_may_pull(skb, srcs_offset)) |
97300b5f | 1336 | return -EINVAL; |
96b52e61 | 1337 | |
9c70220b | 1338 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
84698963 | 1339 | |
2b7c121f DB |
1340 | err = mld_process_v2(idev, mlh2, &max_delay); |
1341 | if (err < 0) | |
1342 | return err; | |
89225d1c | 1343 | |
1da177e4 | 1344 | if (group_type == IPV6_ADDR_ANY) { /* general query */ |
96b52e61 | 1345 | if (mlh2->mld2q_nsrcs) |
1da177e4 | 1346 | return -EINVAL; /* no sources allowed */ |
96b52e61 | 1347 | |
1da177e4 | 1348 | mld_gq_start_timer(idev); |
1da177e4 LT |
1349 | return 0; |
1350 | } | |
1351 | /* mark sources to include, if group & source-specific */ | |
6e7cb837 | 1352 | if (mlh2->mld2q_nsrcs != 0) { |
1ab1457c | 1353 | if (!pskb_may_pull(skb, srcs_offset + |
96b52e61 | 1354 | ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr))) |
97300b5f | 1355 | return -EINVAL; |
96b52e61 | 1356 | |
9c70220b | 1357 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
97300b5f YZ |
1358 | mark = 1; |
1359 | } | |
96b52e61 | 1360 | } else |
1da177e4 | 1361 | return -EINVAL; |
1da177e4 LT |
1362 | |
1363 | read_lock_bh(&idev->lock); | |
1364 | if (group_type == IPV6_ADDR_ANY) { | |
67ba4152 | 1365 | for (ma = idev->mc_list; ma; ma = ma->next) { |
1da177e4 LT |
1366 | spin_lock_bh(&ma->mca_lock); |
1367 | igmp6_group_queried(ma, max_delay); | |
1368 | spin_unlock_bh(&ma->mca_lock); | |
1369 | } | |
1370 | } else { | |
67ba4152 | 1371 | for (ma = idev->mc_list; ma; ma = ma->next) { |
7add2a43 | 1372 | if (!ipv6_addr_equal(group, &ma->mca_addr)) |
1da177e4 LT |
1373 | continue; |
1374 | spin_lock_bh(&ma->mca_lock); | |
1375 | if (ma->mca_flags & MAF_TIMER_RUNNING) { | |
1376 | /* gsquery <- gsquery && mark */ | |
1377 | if (!mark) | |
1378 | ma->mca_flags &= ~MAF_GSQUERY; | |
1379 | } else { | |
1380 | /* gsquery <- mark */ | |
1381 | if (mark) | |
1382 | ma->mca_flags |= MAF_GSQUERY; | |
1383 | else | |
1384 | ma->mca_flags &= ~MAF_GSQUERY; | |
1385 | } | |
5ab4a6c8 | 1386 | if (!(ma->mca_flags & MAF_GSQUERY) || |
6e7cb837 | 1387 | mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs)) |
5ab4a6c8 | 1388 | igmp6_group_queried(ma, max_delay); |
1da177e4 | 1389 | spin_unlock_bh(&ma->mca_lock); |
7add2a43 | 1390 | break; |
1da177e4 LT |
1391 | } |
1392 | } | |
1393 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1394 | |
1395 | return 0; | |
1396 | } | |
1397 | ||
96b52e61 | 1398 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1399 | int igmp6_event_report(struct sk_buff *skb) |
1400 | { | |
1401 | struct ifmcaddr6 *ma; | |
1da177e4 | 1402 | struct inet6_dev *idev; |
6e7cb837 | 1403 | struct mld_msg *mld; |
1da177e4 LT |
1404 | int addr_type; |
1405 | ||
1406 | /* Our own report looped back. Ignore it. */ | |
1407 | if (skb->pkt_type == PACKET_LOOPBACK) | |
1408 | return 0; | |
1409 | ||
24c69275 DS |
1410 | /* send our report if the MC router may not have heard this report */ |
1411 | if (skb->pkt_type != PACKET_MULTICAST && | |
1412 | skb->pkt_type != PACKET_BROADCAST) | |
1413 | return 0; | |
1414 | ||
6e7cb837 | 1415 | if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr))) |
1da177e4 LT |
1416 | return -EINVAL; |
1417 | ||
6e7cb837 | 1418 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1da177e4 LT |
1419 | |
1420 | /* Drop reports with not link local source */ | |
0660e03f | 1421 | addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr); |
1ab1457c | 1422 | if (addr_type != IPV6_ADDR_ANY && |
1da177e4 LT |
1423 | !(addr_type&IPV6_ADDR_LINKLOCAL)) |
1424 | return -EINVAL; | |
1425 | ||
96b52e61 | 1426 | idev = __in6_dev_get(skb->dev); |
1da177e4 LT |
1427 | if (idev == NULL) |
1428 | return -ENODEV; | |
1429 | ||
1430 | /* | |
1431 | * Cancel the timer for this group | |
1432 | */ | |
1433 | ||
1434 | read_lock_bh(&idev->lock); | |
67ba4152 | 1435 | for (ma = idev->mc_list; ma; ma = ma->next) { |
6e7cb837 | 1436 | if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) { |
1da177e4 LT |
1437 | spin_lock(&ma->mca_lock); |
1438 | if (del_timer(&ma->mca_timer)) | |
1439 | atomic_dec(&ma->mca_refcnt); | |
1440 | ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING); | |
1441 | spin_unlock(&ma->mca_lock); | |
1442 | break; | |
1443 | } | |
1444 | } | |
1445 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1446 | return 0; |
1447 | } | |
1448 | ||
a50feda5 ED |
1449 | static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type, |
1450 | int gdeleted, int sdeleted) | |
1da177e4 LT |
1451 | { |
1452 | switch (type) { | |
1453 | case MLD2_MODE_IS_INCLUDE: | |
1454 | case MLD2_MODE_IS_EXCLUDE: | |
1455 | if (gdeleted || sdeleted) | |
a50feda5 | 1456 | return false; |
5ab4a6c8 DS |
1457 | if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) { |
1458 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
a50feda5 | 1459 | return true; |
5ab4a6c8 DS |
1460 | /* don't include if this source is excluded |
1461 | * in all filters | |
1462 | */ | |
1463 | if (psf->sf_count[MCAST_INCLUDE]) | |
7add2a43 | 1464 | return type == MLD2_MODE_IS_INCLUDE; |
5ab4a6c8 DS |
1465 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1466 | psf->sf_count[MCAST_EXCLUDE]; | |
1467 | } | |
a50feda5 | 1468 | return false; |
1da177e4 LT |
1469 | case MLD2_CHANGE_TO_INCLUDE: |
1470 | if (gdeleted || sdeleted) | |
a50feda5 | 1471 | return false; |
1da177e4 LT |
1472 | return psf->sf_count[MCAST_INCLUDE] != 0; |
1473 | case MLD2_CHANGE_TO_EXCLUDE: | |
1474 | if (gdeleted || sdeleted) | |
a50feda5 | 1475 | return false; |
1da177e4 LT |
1476 | if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 || |
1477 | psf->sf_count[MCAST_INCLUDE]) | |
a50feda5 | 1478 | return false; |
1da177e4 LT |
1479 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1480 | psf->sf_count[MCAST_EXCLUDE]; | |
1481 | case MLD2_ALLOW_NEW_SOURCES: | |
1482 | if (gdeleted || !psf->sf_crcount) | |
a50feda5 | 1483 | return false; |
1da177e4 LT |
1484 | return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted; |
1485 | case MLD2_BLOCK_OLD_SOURCES: | |
1486 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1487 | return gdeleted || (psf->sf_crcount && sdeleted); | |
1488 | return psf->sf_crcount && !gdeleted && !sdeleted; | |
1489 | } | |
a50feda5 | 1490 | return false; |
1da177e4 LT |
1491 | } |
1492 | ||
1493 | static int | |
1494 | mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted) | |
1495 | { | |
1496 | struct ip6_sf_list *psf; | |
1497 | int scount = 0; | |
1498 | ||
67ba4152 | 1499 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
1500 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) |
1501 | continue; | |
1502 | scount++; | |
1503 | } | |
1504 | return scount; | |
1505 | } | |
1506 | ||
2576f17d YH |
1507 | static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb, |
1508 | struct net_device *dev, | |
1509 | const struct in6_addr *saddr, | |
1510 | const struct in6_addr *daddr, | |
1511 | int proto, int len) | |
1512 | { | |
1513 | struct ipv6hdr *hdr; | |
1514 | ||
1515 | skb->protocol = htons(ETH_P_IPV6); | |
1516 | skb->dev = dev; | |
1517 | ||
1518 | skb_reset_network_header(skb); | |
1519 | skb_put(skb, sizeof(struct ipv6hdr)); | |
1520 | hdr = ipv6_hdr(skb); | |
1521 | ||
1522 | ip6_flow_hdr(hdr, 0, 0); | |
1523 | ||
1524 | hdr->payload_len = htons(len); | |
1525 | hdr->nexthdr = proto; | |
1526 | hdr->hop_limit = inet6_sk(sk)->hop_limit; | |
1527 | ||
1528 | hdr->saddr = *saddr; | |
1529 | hdr->daddr = *daddr; | |
1530 | } | |
1531 | ||
8965779d | 1532 | static struct sk_buff *mld_newpack(struct inet6_dev *idev, int size) |
1da177e4 | 1533 | { |
8965779d | 1534 | struct net_device *dev = idev->dev; |
c346dca1 | 1535 | struct net *net = dev_net(dev); |
b8ad0cbc | 1536 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 LT |
1537 | struct sk_buff *skb; |
1538 | struct mld2_report *pmr; | |
1539 | struct in6_addr addr_buf; | |
d7aabf22 | 1540 | const struct in6_addr *saddr; |
a7ae1992 HX |
1541 | int hlen = LL_RESERVED_SPACE(dev); |
1542 | int tlen = dev->needed_tailroom; | |
1da177e4 LT |
1543 | int err; |
1544 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1545 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1546 | IPV6_TLV_PADN, 0 }; | |
1547 | ||
1548 | /* we assume size > sizeof(ra) here */ | |
a7ae1992 | 1549 | size += hlen + tlen; |
72e09ad1 ED |
1550 | /* limit our allocations to order-0 page */ |
1551 | size = min_t(int, size, SKB_MAX_ORDER(0, 0)); | |
1552 | skb = sock_alloc_send_skb(sk, size, 1, &err); | |
1da177e4 | 1553 | |
cfcabdcc | 1554 | if (!skb) |
1da177e4 LT |
1555 | return NULL; |
1556 | ||
9d4a0314 | 1557 | skb->priority = TC_PRIO_CONTROL; |
a7ae1992 | 1558 | skb_reserve(skb, hlen); |
1da177e4 | 1559 | |
8965779d | 1560 | if (__ipv6_get_lladdr(idev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1561 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1562 | * use unspecified address as the source address |
1da177e4 LT |
1563 | * when a valid link-local address is not available. |
1564 | */ | |
d7aabf22 YH |
1565 | saddr = &in6addr_any; |
1566 | } else | |
1567 | saddr = &addr_buf; | |
1da177e4 | 1568 | |
2576f17d | 1569 | ip6_mc_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0); |
1da177e4 LT |
1570 | |
1571 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1572 | ||
27a884dc | 1573 | skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data); |
d10ba34b ACM |
1574 | skb_put(skb, sizeof(*pmr)); |
1575 | pmr = (struct mld2_report *)skb_transport_header(skb); | |
6e7cb837 YH |
1576 | pmr->mld2r_type = ICMPV6_MLD2_REPORT; |
1577 | pmr->mld2r_resv1 = 0; | |
1578 | pmr->mld2r_cksum = 0; | |
1579 | pmr->mld2r_resv2 = 0; | |
1580 | pmr->mld2r_ngrec = 0; | |
1da177e4 LT |
1581 | return skb; |
1582 | } | |
1583 | ||
1584 | static void mld_sendpack(struct sk_buff *skb) | |
1585 | { | |
0660e03f | 1586 | struct ipv6hdr *pip6 = ipv6_hdr(skb); |
9c70220b ACM |
1587 | struct mld2_report *pmr = |
1588 | (struct mld2_report *)skb_transport_header(skb); | |
1da177e4 | 1589 | int payload_len, mldlen; |
96b52e61 | 1590 | struct inet6_dev *idev; |
c346dca1 | 1591 | struct net *net = dev_net(skb->dev); |
1da177e4 | 1592 | int err; |
4c9483b2 | 1593 | struct flowi6 fl6; |
adf30907 | 1594 | struct dst_entry *dst; |
1da177e4 | 1595 | |
96b52e61 ED |
1596 | rcu_read_lock(); |
1597 | idev = __in6_dev_get(skb->dev); | |
edf391ff NH |
1598 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len); |
1599 | ||
29a3cad5 SH |
1600 | payload_len = (skb_tail_pointer(skb) - skb_network_header(skb)) - |
1601 | sizeof(*pip6); | |
1602 | mldlen = skb_tail_pointer(skb) - skb_transport_header(skb); | |
1da177e4 LT |
1603 | pip6->payload_len = htons(payload_len); |
1604 | ||
6e7cb837 YH |
1605 | pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen, |
1606 | IPPROTO_ICMPV6, | |
1607 | csum_partial(skb_transport_header(skb), | |
1608 | mldlen, 0)); | |
41927178 | 1609 | |
4c9483b2 | 1610 | icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT, |
41927178 YH |
1611 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1612 | skb->dev->ifindex); | |
12fd84f4 | 1613 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
41927178 | 1614 | |
452edd59 DM |
1615 | err = 0; |
1616 | if (IS_ERR(dst)) { | |
1617 | err = PTR_ERR(dst); | |
1618 | dst = NULL; | |
1619 | } | |
adf30907 | 1620 | skb_dst_set(skb, dst); |
41927178 YH |
1621 | if (err) |
1622 | goto err_out; | |
1623 | ||
edf391ff NH |
1624 | payload_len = skb->len; |
1625 | ||
b2e0b385 | 1626 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
41927178 YH |
1627 | dst_output); |
1628 | out: | |
1da177e4 | 1629 | if (!err) { |
43a43b60 HFS |
1630 | ICMP6MSGOUT_INC_STATS(net, idev, ICMPV6_MLD2_REPORT); |
1631 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); | |
1632 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, payload_len); | |
1633 | } else { | |
1634 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); | |
1635 | } | |
1da177e4 | 1636 | |
96b52e61 | 1637 | rcu_read_unlock(); |
41927178 YH |
1638 | return; |
1639 | ||
1640 | err_out: | |
1641 | kfree_skb(skb); | |
1642 | goto out; | |
1da177e4 LT |
1643 | } |
1644 | ||
1645 | static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel) | |
1646 | { | |
fab10fe3 | 1647 | return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel); |
1da177e4 LT |
1648 | } |
1649 | ||
1650 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1651 | int type, struct mld2_grec **ppgr) | |
1652 | { | |
1653 | struct net_device *dev = pmc->idev->dev; | |
1654 | struct mld2_report *pmr; | |
1655 | struct mld2_grec *pgr; | |
1656 | ||
1657 | if (!skb) | |
8965779d | 1658 | skb = mld_newpack(pmc->idev, dev->mtu); |
1da177e4 LT |
1659 | if (!skb) |
1660 | return NULL; | |
1661 | pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec)); | |
1662 | pgr->grec_type = type; | |
1663 | pgr->grec_auxwords = 0; | |
1664 | pgr->grec_nsrcs = 0; | |
1665 | pgr->grec_mca = pmc->mca_addr; /* structure copy */ | |
9c70220b | 1666 | pmr = (struct mld2_report *)skb_transport_header(skb); |
6e7cb837 | 1667 | pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1); |
1da177e4 LT |
1668 | *ppgr = pgr; |
1669 | return skb; | |
1670 | } | |
1671 | ||
1672 | #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \ | |
1673 | skb_tailroom(skb)) : 0) | |
1674 | ||
1675 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
6a7cc418 | 1676 | int type, int gdeleted, int sdeleted, int crsend) |
1da177e4 | 1677 | { |
8965779d AW |
1678 | struct inet6_dev *idev = pmc->idev; |
1679 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
1680 | struct mld2_report *pmr; |
1681 | struct mld2_grec *pgr = NULL; | |
1682 | struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list; | |
5ab4a6c8 | 1683 | int scount, stotal, first, isquery, truncate; |
1da177e4 LT |
1684 | |
1685 | if (pmc->mca_flags & MAF_NOREPORT) | |
1686 | return skb; | |
1687 | ||
1688 | isquery = type == MLD2_MODE_IS_INCLUDE || | |
1689 | type == MLD2_MODE_IS_EXCLUDE; | |
1690 | truncate = type == MLD2_MODE_IS_EXCLUDE || | |
1691 | type == MLD2_CHANGE_TO_EXCLUDE; | |
1692 | ||
5ab4a6c8 DS |
1693 | stotal = scount = 0; |
1694 | ||
1da177e4 LT |
1695 | psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources; |
1696 | ||
5ab4a6c8 DS |
1697 | if (!*psf_list) |
1698 | goto empty_source; | |
1699 | ||
9c70220b | 1700 | pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL; |
1da177e4 LT |
1701 | |
1702 | /* EX and TO_EX get a fresh packet, if needed */ | |
1703 | if (truncate) { | |
6e7cb837 | 1704 | if (pmr && pmr->mld2r_ngrec && |
1da177e4 LT |
1705 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { |
1706 | if (skb) | |
1707 | mld_sendpack(skb); | |
8965779d | 1708 | skb = mld_newpack(idev, dev->mtu); |
1da177e4 LT |
1709 | } |
1710 | } | |
1711 | first = 1; | |
1da177e4 | 1712 | psf_prev = NULL; |
67ba4152 | 1713 | for (psf = *psf_list; psf; psf = psf_next) { |
1da177e4 LT |
1714 | struct in6_addr *psrc; |
1715 | ||
1716 | psf_next = psf->sf_next; | |
1717 | ||
1718 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) { | |
1719 | psf_prev = psf; | |
1720 | continue; | |
1721 | } | |
1722 | ||
1723 | /* clear marks on query responses */ | |
1724 | if (isquery) | |
1725 | psf->sf_gsresp = 0; | |
1726 | ||
1727 | if (AVAILABLE(skb) < sizeof(*psrc) + | |
1728 | first*sizeof(struct mld2_grec)) { | |
1729 | if (truncate && !first) | |
1730 | break; /* truncate these */ | |
1731 | if (pgr) | |
1732 | pgr->grec_nsrcs = htons(scount); | |
1733 | if (skb) | |
1734 | mld_sendpack(skb); | |
8965779d | 1735 | skb = mld_newpack(idev, dev->mtu); |
1da177e4 LT |
1736 | first = 1; |
1737 | scount = 0; | |
1738 | } | |
1739 | if (first) { | |
1740 | skb = add_grhead(skb, pmc, type, &pgr); | |
1741 | first = 0; | |
1742 | } | |
cc63f70b AD |
1743 | if (!skb) |
1744 | return NULL; | |
1da177e4 LT |
1745 | psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc)); |
1746 | *psrc = psf->sf_addr; | |
5ab4a6c8 | 1747 | scount++; stotal++; |
1da177e4 LT |
1748 | if ((type == MLD2_ALLOW_NEW_SOURCES || |
1749 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) { | |
1750 | psf->sf_crcount--; | |
1751 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { | |
1752 | if (psf_prev) | |
1753 | psf_prev->sf_next = psf->sf_next; | |
1754 | else | |
1755 | *psf_list = psf->sf_next; | |
1756 | kfree(psf); | |
1757 | continue; | |
1758 | } | |
1759 | } | |
1760 | psf_prev = psf; | |
1761 | } | |
5ab4a6c8 DS |
1762 | |
1763 | empty_source: | |
1764 | if (!stotal) { | |
1765 | if (type == MLD2_ALLOW_NEW_SOURCES || | |
1766 | type == MLD2_BLOCK_OLD_SOURCES) | |
1767 | return skb; | |
6a7cc418 | 1768 | if (pmc->mca_crcount || isquery || crsend) { |
5ab4a6c8 DS |
1769 | /* make sure we have room for group header */ |
1770 | if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) { | |
1771 | mld_sendpack(skb); | |
1772 | skb = NULL; /* add_grhead will get a new one */ | |
1773 | } | |
1774 | skb = add_grhead(skb, pmc, type, &pgr); | |
1775 | } | |
1776 | } | |
1da177e4 LT |
1777 | if (pgr) |
1778 | pgr->grec_nsrcs = htons(scount); | |
1779 | ||
1780 | if (isquery) | |
1781 | pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */ | |
1782 | return skb; | |
1783 | } | |
1784 | ||
1785 | static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc) | |
1786 | { | |
1787 | struct sk_buff *skb = NULL; | |
1788 | int type; | |
1789 | ||
8965779d | 1790 | read_lock_bh(&idev->lock); |
1da177e4 | 1791 | if (!pmc) { |
67ba4152 | 1792 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
1793 | if (pmc->mca_flags & MAF_NOREPORT) |
1794 | continue; | |
1795 | spin_lock_bh(&pmc->mca_lock); | |
1796 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1797 | type = MLD2_MODE_IS_EXCLUDE; | |
1798 | else | |
1799 | type = MLD2_MODE_IS_INCLUDE; | |
6a7cc418 | 1800 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1da177e4 LT |
1801 | spin_unlock_bh(&pmc->mca_lock); |
1802 | } | |
1da177e4 LT |
1803 | } else { |
1804 | spin_lock_bh(&pmc->mca_lock); | |
1805 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1806 | type = MLD2_MODE_IS_EXCLUDE; | |
1807 | else | |
1808 | type = MLD2_MODE_IS_INCLUDE; | |
6a7cc418 | 1809 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1da177e4 LT |
1810 | spin_unlock_bh(&pmc->mca_lock); |
1811 | } | |
8965779d | 1812 | read_unlock_bh(&idev->lock); |
1da177e4 LT |
1813 | if (skb) |
1814 | mld_sendpack(skb); | |
1815 | } | |
1816 | ||
1817 | /* | |
1818 | * remove zero-count source records from a source filter list | |
1819 | */ | |
1820 | static void mld_clear_zeros(struct ip6_sf_list **ppsf) | |
1821 | { | |
1822 | struct ip6_sf_list *psf_prev, *psf_next, *psf; | |
1823 | ||
1824 | psf_prev = NULL; | |
67ba4152 | 1825 | for (psf = *ppsf; psf; psf = psf_next) { |
1da177e4 LT |
1826 | psf_next = psf->sf_next; |
1827 | if (psf->sf_crcount == 0) { | |
1828 | if (psf_prev) | |
1829 | psf_prev->sf_next = psf->sf_next; | |
1830 | else | |
1831 | *ppsf = psf->sf_next; | |
1832 | kfree(psf); | |
1833 | } else | |
1834 | psf_prev = psf; | |
1835 | } | |
1836 | } | |
1837 | ||
1838 | static void mld_send_cr(struct inet6_dev *idev) | |
1839 | { | |
1840 | struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next; | |
1841 | struct sk_buff *skb = NULL; | |
1842 | int type, dtype; | |
1843 | ||
1844 | read_lock_bh(&idev->lock); | |
6457d26b | 1845 | spin_lock(&idev->mc_lock); |
1da177e4 LT |
1846 | |
1847 | /* deleted MCA's */ | |
1848 | pmc_prev = NULL; | |
67ba4152 | 1849 | for (pmc = idev->mc_tomb; pmc; pmc = pmc_next) { |
1da177e4 LT |
1850 | pmc_next = pmc->next; |
1851 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
1852 | type = MLD2_BLOCK_OLD_SOURCES; | |
1853 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
6a7cc418 FL |
1854 | skb = add_grec(skb, pmc, type, 1, 0, 0); |
1855 | skb = add_grec(skb, pmc, dtype, 1, 1, 0); | |
1da177e4 LT |
1856 | } |
1857 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1858 | if (pmc->mca_sfmode == MCAST_EXCLUDE) { |
1859 | type = MLD2_CHANGE_TO_INCLUDE; | |
6a7cc418 | 1860 | skb = add_grec(skb, pmc, type, 1, 0, 0); |
1da177e4 | 1861 | } |
5ab4a6c8 | 1862 | pmc->mca_crcount--; |
1da177e4 LT |
1863 | if (pmc->mca_crcount == 0) { |
1864 | mld_clear_zeros(&pmc->mca_tomb); | |
1865 | mld_clear_zeros(&pmc->mca_sources); | |
1866 | } | |
1867 | } | |
1868 | if (pmc->mca_crcount == 0 && !pmc->mca_tomb && | |
1869 | !pmc->mca_sources) { | |
1870 | if (pmc_prev) | |
1871 | pmc_prev->next = pmc_next; | |
1872 | else | |
1873 | idev->mc_tomb = pmc_next; | |
1874 | in6_dev_put(pmc->idev); | |
1875 | kfree(pmc); | |
1876 | } else | |
1877 | pmc_prev = pmc; | |
1878 | } | |
6457d26b | 1879 | spin_unlock(&idev->mc_lock); |
1da177e4 LT |
1880 | |
1881 | /* change recs */ | |
67ba4152 | 1882 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
1883 | spin_lock_bh(&pmc->mca_lock); |
1884 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1885 | type = MLD2_BLOCK_OLD_SOURCES; | |
1886 | dtype = MLD2_ALLOW_NEW_SOURCES; | |
1887 | } else { | |
1888 | type = MLD2_ALLOW_NEW_SOURCES; | |
1889 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1890 | } | |
6a7cc418 FL |
1891 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
1892 | skb = add_grec(skb, pmc, dtype, 0, 1, 0); /* deleted sources */ | |
1da177e4 LT |
1893 | |
1894 | /* filter mode changes */ | |
1895 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1896 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
1897 | type = MLD2_CHANGE_TO_EXCLUDE; | |
1898 | else | |
1899 | type = MLD2_CHANGE_TO_INCLUDE; | |
6a7cc418 | 1900 | skb = add_grec(skb, pmc, type, 0, 0, 0); |
5ab4a6c8 | 1901 | pmc->mca_crcount--; |
1da177e4 LT |
1902 | } |
1903 | spin_unlock_bh(&pmc->mca_lock); | |
1904 | } | |
1905 | read_unlock_bh(&idev->lock); | |
1906 | if (!skb) | |
1907 | return; | |
1908 | (void) mld_sendpack(skb); | |
1909 | } | |
1910 | ||
1911 | static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type) | |
1912 | { | |
c346dca1 | 1913 | struct net *net = dev_net(dev); |
b8ad0cbc | 1914 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 | 1915 | struct inet6_dev *idev; |
1ab1457c | 1916 | struct sk_buff *skb; |
6e7cb837 | 1917 | struct mld_msg *hdr; |
d7aabf22 | 1918 | const struct in6_addr *snd_addr, *saddr; |
1da177e4 | 1919 | struct in6_addr addr_buf; |
a7ae1992 HX |
1920 | int hlen = LL_RESERVED_SPACE(dev); |
1921 | int tlen = dev->needed_tailroom; | |
1da177e4 LT |
1922 | int err, len, payload_len, full_len; |
1923 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1924 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1925 | IPV6_TLV_PADN, 0 }; | |
4c9483b2 | 1926 | struct flowi6 fl6; |
adf30907 | 1927 | struct dst_entry *dst; |
1da177e4 | 1928 | |
f3ee4010 YH |
1929 | if (type == ICMPV6_MGM_REDUCTION) |
1930 | snd_addr = &in6addr_linklocal_allrouters; | |
1931 | else | |
1932 | snd_addr = addr; | |
1da177e4 LT |
1933 | |
1934 | len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); | |
1935 | payload_len = len + sizeof(ra); | |
1936 | full_len = sizeof(struct ipv6hdr) + payload_len; | |
1937 | ||
edf391ff NH |
1938 | rcu_read_lock(); |
1939 | IP6_UPD_PO_STATS(net, __in6_dev_get(dev), | |
1940 | IPSTATS_MIB_OUT, full_len); | |
1941 | rcu_read_unlock(); | |
1942 | ||
a7ae1992 | 1943 | skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err); |
1da177e4 LT |
1944 | |
1945 | if (skb == NULL) { | |
a11d206d | 1946 | rcu_read_lock(); |
3bd653c8 | 1947 | IP6_INC_STATS(net, __in6_dev_get(dev), |
a11d206d YH |
1948 | IPSTATS_MIB_OUTDISCARDS); |
1949 | rcu_read_unlock(); | |
1da177e4 LT |
1950 | return; |
1951 | } | |
9d4a0314 | 1952 | skb->priority = TC_PRIO_CONTROL; |
a7ae1992 | 1953 | skb_reserve(skb, hlen); |
1da177e4 | 1954 | |
95c385b4 | 1955 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1956 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1957 | * use unspecified address as the source address |
1da177e4 LT |
1958 | * when a valid link-local address is not available. |
1959 | */ | |
d7aabf22 YH |
1960 | saddr = &in6addr_any; |
1961 | } else | |
1962 | saddr = &addr_buf; | |
1da177e4 | 1963 | |
2576f17d | 1964 | ip6_mc_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len); |
1da177e4 LT |
1965 | |
1966 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1967 | ||
6e7cb837 YH |
1968 | hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg)); |
1969 | memset(hdr, 0, sizeof(struct mld_msg)); | |
1970 | hdr->mld_type = type; | |
4e3fd7a0 | 1971 | hdr->mld_mca = *addr; |
1da177e4 | 1972 | |
6e7cb837 YH |
1973 | hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len, |
1974 | IPPROTO_ICMPV6, | |
1975 | csum_partial(hdr, len, 0)); | |
1da177e4 | 1976 | |
96b52e61 ED |
1977 | rcu_read_lock(); |
1978 | idev = __in6_dev_get(skb->dev); | |
1da177e4 | 1979 | |
4c9483b2 | 1980 | icmpv6_flow_init(sk, &fl6, type, |
41927178 YH |
1981 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1982 | skb->dev->ifindex); | |
12fd84f4 | 1983 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
452edd59 DM |
1984 | if (IS_ERR(dst)) { |
1985 | err = PTR_ERR(dst); | |
41927178 | 1986 | goto err_out; |
452edd59 | 1987 | } |
41927178 | 1988 | |
adf30907 | 1989 | skb_dst_set(skb, dst); |
b2e0b385 | 1990 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
41927178 YH |
1991 | dst_output); |
1992 | out: | |
1da177e4 | 1993 | if (!err) { |
5c5d244b | 1994 | ICMP6MSGOUT_INC_STATS(net, idev, type); |
a862f6a6 | 1995 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); |
edf391ff | 1996 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len); |
1da177e4 | 1997 | } else |
3bd653c8 | 1998 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 | 1999 | |
96b52e61 | 2000 | rcu_read_unlock(); |
1da177e4 | 2001 | return; |
41927178 YH |
2002 | |
2003 | err_out: | |
2004 | kfree_skb(skb); | |
2005 | goto out; | |
1da177e4 LT |
2006 | } |
2007 | ||
6a7cc418 | 2008 | static void mld_send_initial_cr(struct inet6_dev *idev) |
b173ee48 | 2009 | { |
6a7cc418 FL |
2010 | struct sk_buff *skb; |
2011 | struct ifmcaddr6 *pmc; | |
2012 | int type; | |
2013 | ||
2014 | if (mld_in_v1_mode(idev)) | |
2015 | return; | |
2016 | ||
2017 | skb = NULL; | |
2018 | read_lock_bh(&idev->lock); | |
67ba4152 | 2019 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
6a7cc418 FL |
2020 | spin_lock_bh(&pmc->mca_lock); |
2021 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2022 | type = MLD2_CHANGE_TO_EXCLUDE; | |
2023 | else | |
2024 | type = MLD2_CHANGE_TO_INCLUDE; | |
2025 | skb = add_grec(skb, pmc, type, 0, 0, 1); | |
2026 | spin_unlock_bh(&pmc->mca_lock); | |
b173ee48 | 2027 | } |
6a7cc418 FL |
2028 | read_unlock_bh(&idev->lock); |
2029 | if (skb) | |
2030 | mld_sendpack(skb); | |
b173ee48 HFS |
2031 | } |
2032 | ||
2033 | void ipv6_mc_dad_complete(struct inet6_dev *idev) | |
2034 | { | |
2035 | idev->mc_dad_count = idev->mc_qrv; | |
2036 | if (idev->mc_dad_count) { | |
6a7cc418 | 2037 | mld_send_initial_cr(idev); |
b173ee48 HFS |
2038 | idev->mc_dad_count--; |
2039 | if (idev->mc_dad_count) | |
2040 | mld_dad_start_timer(idev, idev->mc_maxdelay); | |
2041 | } | |
2042 | } | |
2043 | ||
2044 | static void mld_dad_timer_expire(unsigned long data) | |
2045 | { | |
2046 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2047 | ||
6a7cc418 | 2048 | mld_send_initial_cr(idev); |
b173ee48 HFS |
2049 | if (idev->mc_dad_count) { |
2050 | idev->mc_dad_count--; | |
2051 | if (idev->mc_dad_count) | |
2052 | mld_dad_start_timer(idev, idev->mc_maxdelay); | |
2053 | } | |
9260d3e1 | 2054 | in6_dev_put(idev); |
b173ee48 HFS |
2055 | } |
2056 | ||
1da177e4 | 2057 | static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode, |
b71d1d42 | 2058 | const struct in6_addr *psfsrc) |
1da177e4 LT |
2059 | { |
2060 | struct ip6_sf_list *psf, *psf_prev; | |
2061 | int rv = 0; | |
2062 | ||
2063 | psf_prev = NULL; | |
67ba4152 | 2064 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2065 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
2066 | break; | |
2067 | psf_prev = psf; | |
2068 | } | |
2069 | if (!psf || psf->sf_count[sfmode] == 0) { | |
2070 | /* source filter not found, or count wrong => bug */ | |
2071 | return -ESRCH; | |
2072 | } | |
2073 | psf->sf_count[sfmode]--; | |
2074 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { | |
2075 | struct inet6_dev *idev = pmc->idev; | |
2076 | ||
2077 | /* no more filters for this source */ | |
2078 | if (psf_prev) | |
2079 | psf_prev->sf_next = psf->sf_next; | |
2080 | else | |
2081 | pmc->mca_sources = psf->sf_next; | |
2082 | if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) && | |
6c567b78 | 2083 | !mld_in_v1_mode(idev)) { |
1da177e4 LT |
2084 | psf->sf_crcount = idev->mc_qrv; |
2085 | psf->sf_next = pmc->mca_tomb; | |
2086 | pmc->mca_tomb = psf; | |
2087 | rv = 1; | |
2088 | } else | |
2089 | kfree(psf); | |
2090 | } | |
2091 | return rv; | |
2092 | } | |
2093 | ||
b71d1d42 ED |
2094 | static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
2095 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
2096 | int delta) |
2097 | { | |
2098 | struct ifmcaddr6 *pmc; | |
2099 | int changerec = 0; | |
2100 | int i, err; | |
2101 | ||
2102 | if (!idev) | |
2103 | return -ENODEV; | |
2104 | read_lock_bh(&idev->lock); | |
67ba4152 | 2105 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
2106 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
2107 | break; | |
2108 | } | |
2109 | if (!pmc) { | |
2110 | /* MCA not found?? bug */ | |
2111 | read_unlock_bh(&idev->lock); | |
2112 | return -ESRCH; | |
2113 | } | |
2114 | spin_lock_bh(&pmc->mca_lock); | |
2115 | sf_markstate(pmc); | |
2116 | if (!delta) { | |
2117 | if (!pmc->mca_sfcount[sfmode]) { | |
2118 | spin_unlock_bh(&pmc->mca_lock); | |
2119 | read_unlock_bh(&idev->lock); | |
2120 | return -EINVAL; | |
2121 | } | |
2122 | pmc->mca_sfcount[sfmode]--; | |
2123 | } | |
2124 | err = 0; | |
67ba4152 | 2125 | for (i = 0; i < sfcount; i++) { |
1da177e4 LT |
2126 | int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); |
2127 | ||
2128 | changerec |= rv > 0; | |
2129 | if (!err && rv < 0) | |
2130 | err = rv; | |
2131 | } | |
2132 | if (pmc->mca_sfmode == MCAST_EXCLUDE && | |
2133 | pmc->mca_sfcount[MCAST_EXCLUDE] == 0 && | |
2134 | pmc->mca_sfcount[MCAST_INCLUDE]) { | |
2135 | struct ip6_sf_list *psf; | |
2136 | ||
2137 | /* filter mode change */ | |
2138 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2139 | pmc->mca_crcount = idev->mc_qrv; | |
2140 | idev->mc_ifc_count = pmc->mca_crcount; | |
67ba4152 | 2141 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2142 | psf->sf_crcount = 0; |
2143 | mld_ifc_event(pmc->idev); | |
2144 | } else if (sf_setstate(pmc) || changerec) | |
2145 | mld_ifc_event(pmc->idev); | |
2146 | spin_unlock_bh(&pmc->mca_lock); | |
2147 | read_unlock_bh(&idev->lock); | |
2148 | return err; | |
2149 | } | |
2150 | ||
2151 | /* | |
2152 | * Add multicast single-source filter to the interface list | |
2153 | */ | |
2154 | static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode, | |
99d2f47a | 2155 | const struct in6_addr *psfsrc) |
1da177e4 LT |
2156 | { |
2157 | struct ip6_sf_list *psf, *psf_prev; | |
2158 | ||
2159 | psf_prev = NULL; | |
67ba4152 | 2160 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2161 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) |
2162 | break; | |
2163 | psf_prev = psf; | |
2164 | } | |
2165 | if (!psf) { | |
0c600eda | 2166 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
1da177e4 LT |
2167 | if (!psf) |
2168 | return -ENOBUFS; | |
0c600eda | 2169 | |
1da177e4 LT |
2170 | psf->sf_addr = *psfsrc; |
2171 | if (psf_prev) { | |
2172 | psf_prev->sf_next = psf; | |
2173 | } else | |
2174 | pmc->mca_sources = psf; | |
2175 | } | |
2176 | psf->sf_count[sfmode]++; | |
2177 | return 0; | |
2178 | } | |
2179 | ||
2180 | static void sf_markstate(struct ifmcaddr6 *pmc) | |
2181 | { | |
2182 | struct ip6_sf_list *psf; | |
2183 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; | |
2184 | ||
67ba4152 | 2185 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2186 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
2187 | psf->sf_oldin = mca_xcount == | |
2188 | psf->sf_count[MCAST_EXCLUDE] && | |
2189 | !psf->sf_count[MCAST_INCLUDE]; | |
2190 | } else | |
2191 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; | |
2192 | } | |
2193 | ||
2194 | static int sf_setstate(struct ifmcaddr6 *pmc) | |
2195 | { | |
7add2a43 | 2196 | struct ip6_sf_list *psf, *dpsf; |
1da177e4 LT |
2197 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
2198 | int qrv = pmc->idev->mc_qrv; | |
2199 | int new_in, rv; | |
2200 | ||
2201 | rv = 0; | |
67ba4152 | 2202 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) { |
1da177e4 LT |
2203 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { |
2204 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && | |
2205 | !psf->sf_count[MCAST_INCLUDE]; | |
2206 | } else | |
2207 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; | |
7add2a43 DS |
2208 | if (new_in) { |
2209 | if (!psf->sf_oldin) { | |
e80e28b6 | 2210 | struct ip6_sf_list *prev = NULL; |
7add2a43 | 2211 | |
67ba4152 IM |
2212 | for (dpsf = pmc->mca_tomb; dpsf; |
2213 | dpsf = dpsf->sf_next) { | |
7add2a43 DS |
2214 | if (ipv6_addr_equal(&dpsf->sf_addr, |
2215 | &psf->sf_addr)) | |
2216 | break; | |
2217 | prev = dpsf; | |
2218 | } | |
2219 | if (dpsf) { | |
2220 | if (prev) | |
2221 | prev->sf_next = dpsf->sf_next; | |
2222 | else | |
2223 | pmc->mca_tomb = dpsf->sf_next; | |
2224 | kfree(dpsf); | |
2225 | } | |
2226 | psf->sf_crcount = qrv; | |
2227 | rv++; | |
2228 | } | |
2229 | } else if (psf->sf_oldin) { | |
2230 | psf->sf_crcount = 0; | |
2231 | /* | |
2232 | * add or update "delete" records if an active filter | |
2233 | * is now inactive | |
2234 | */ | |
67ba4152 | 2235 | for (dpsf = pmc->mca_tomb; dpsf; dpsf = dpsf->sf_next) |
7add2a43 DS |
2236 | if (ipv6_addr_equal(&dpsf->sf_addr, |
2237 | &psf->sf_addr)) | |
2238 | break; | |
2239 | if (!dpsf) { | |
5d55354f | 2240 | dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC); |
7add2a43 DS |
2241 | if (!dpsf) |
2242 | continue; | |
2243 | *dpsf = *psf; | |
2244 | /* pmc->mca_lock held by callers */ | |
2245 | dpsf->sf_next = pmc->mca_tomb; | |
2246 | pmc->mca_tomb = dpsf; | |
2247 | } | |
2248 | dpsf->sf_crcount = qrv; | |
1da177e4 LT |
2249 | rv++; |
2250 | } | |
2251 | } | |
2252 | return rv; | |
2253 | } | |
2254 | ||
2255 | /* | |
2256 | * Add multicast source filter list to the interface list | |
2257 | */ | |
b71d1d42 ED |
2258 | static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
2259 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
2260 | int delta) |
2261 | { | |
2262 | struct ifmcaddr6 *pmc; | |
2263 | int isexclude; | |
2264 | int i, err; | |
2265 | ||
2266 | if (!idev) | |
2267 | return -ENODEV; | |
2268 | read_lock_bh(&idev->lock); | |
67ba4152 | 2269 | for (pmc = idev->mc_list; pmc; pmc = pmc->next) { |
1da177e4 LT |
2270 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) |
2271 | break; | |
2272 | } | |
2273 | if (!pmc) { | |
2274 | /* MCA not found?? bug */ | |
2275 | read_unlock_bh(&idev->lock); | |
2276 | return -ESRCH; | |
2277 | } | |
2278 | spin_lock_bh(&pmc->mca_lock); | |
2279 | ||
2280 | sf_markstate(pmc); | |
2281 | isexclude = pmc->mca_sfmode == MCAST_EXCLUDE; | |
2282 | if (!delta) | |
2283 | pmc->mca_sfcount[sfmode]++; | |
2284 | err = 0; | |
67ba4152 | 2285 | for (i = 0; i < sfcount; i++) { |
99d2f47a | 2286 | err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]); |
1da177e4 LT |
2287 | if (err) |
2288 | break; | |
2289 | } | |
2290 | if (err) { | |
2291 | int j; | |
2292 | ||
2293 | if (!delta) | |
2294 | pmc->mca_sfcount[sfmode]--; | |
67ba4152 | 2295 | for (j = 0; j < i; j++) |
78d50217 | 2296 | ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]); |
1da177e4 | 2297 | } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) { |
1da177e4 LT |
2298 | struct ip6_sf_list *psf; |
2299 | ||
2300 | /* filter mode change */ | |
2301 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2302 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
2303 | else if (pmc->mca_sfcount[MCAST_INCLUDE]) | |
2304 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2305 | /* else no filters; keep old mode for reports */ | |
2306 | ||
2307 | pmc->mca_crcount = idev->mc_qrv; | |
2308 | idev->mc_ifc_count = pmc->mca_crcount; | |
67ba4152 | 2309 | for (psf = pmc->mca_sources; psf; psf = psf->sf_next) |
1da177e4 LT |
2310 | psf->sf_crcount = 0; |
2311 | mld_ifc_event(idev); | |
2312 | } else if (sf_setstate(pmc)) | |
2313 | mld_ifc_event(idev); | |
2314 | spin_unlock_bh(&pmc->mca_lock); | |
2315 | read_unlock_bh(&idev->lock); | |
2316 | return err; | |
2317 | } | |
2318 | ||
2319 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc) | |
2320 | { | |
2321 | struct ip6_sf_list *psf, *nextpsf; | |
2322 | ||
67ba4152 | 2323 | for (psf = pmc->mca_tomb; psf; psf = nextpsf) { |
1da177e4 LT |
2324 | nextpsf = psf->sf_next; |
2325 | kfree(psf); | |
2326 | } | |
2327 | pmc->mca_tomb = NULL; | |
67ba4152 | 2328 | for (psf = pmc->mca_sources; psf; psf = nextpsf) { |
1da177e4 LT |
2329 | nextpsf = psf->sf_next; |
2330 | kfree(psf); | |
2331 | } | |
2332 | pmc->mca_sources = NULL; | |
2333 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
de9daad9 | 2334 | pmc->mca_sfcount[MCAST_INCLUDE] = 0; |
1da177e4 LT |
2335 | pmc->mca_sfcount[MCAST_EXCLUDE] = 1; |
2336 | } | |
2337 | ||
2338 | ||
2339 | static void igmp6_join_group(struct ifmcaddr6 *ma) | |
2340 | { | |
2341 | unsigned long delay; | |
2342 | ||
2343 | if (ma->mca_flags & MAF_NOREPORT) | |
2344 | return; | |
2345 | ||
2346 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2347 | ||
63862b5b | 2348 | delay = prandom_u32() % unsolicited_report_interval(ma->idev); |
1da177e4 LT |
2349 | |
2350 | spin_lock_bh(&ma->mca_lock); | |
2351 | if (del_timer(&ma->mca_timer)) { | |
2352 | atomic_dec(&ma->mca_refcnt); | |
2353 | delay = ma->mca_timer.expires - jiffies; | |
2354 | } | |
2355 | ||
2356 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
2357 | atomic_inc(&ma->mca_refcnt); | |
2358 | ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER; | |
2359 | spin_unlock_bh(&ma->mca_lock); | |
2360 | } | |
2361 | ||
2362 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
2363 | struct inet6_dev *idev) | |
2364 | { | |
2365 | int err; | |
2366 | ||
f7ed925c | 2367 | /* callers have the socket lock and rtnl lock |
5ab4a6c8 DS |
2368 | * so no other readers or writers of iml or its sflist |
2369 | */ | |
cfcabdcc | 2370 | if (!iml->sflist) { |
1da177e4 LT |
2371 | /* any-source empty exclude case */ |
2372 | return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0); | |
2373 | } | |
2374 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, | |
2375 | iml->sflist->sl_count, iml->sflist->sl_addr, 0); | |
2376 | sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max)); | |
2377 | iml->sflist = NULL; | |
2378 | return err; | |
2379 | } | |
2380 | ||
2381 | static void igmp6_leave_group(struct ifmcaddr6 *ma) | |
2382 | { | |
6c567b78 | 2383 | if (mld_in_v1_mode(ma->idev)) { |
1da177e4 LT |
2384 | if (ma->mca_flags & MAF_LAST_REPORTER) |
2385 | igmp6_send(&ma->mca_addr, ma->idev->dev, | |
2386 | ICMPV6_MGM_REDUCTION); | |
2387 | } else { | |
2388 | mld_add_delrec(ma->idev, ma); | |
2389 | mld_ifc_event(ma->idev); | |
2390 | } | |
2391 | } | |
2392 | ||
2393 | static void mld_gq_timer_expire(unsigned long data) | |
2394 | { | |
2395 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2396 | ||
2397 | idev->mc_gq_running = 0; | |
2398 | mld_send_report(idev, NULL); | |
9260d3e1 | 2399 | in6_dev_put(idev); |
1da177e4 LT |
2400 | } |
2401 | ||
2402 | static void mld_ifc_timer_expire(unsigned long data) | |
2403 | { | |
2404 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2405 | ||
2406 | mld_send_cr(idev); | |
2407 | if (idev->mc_ifc_count) { | |
2408 | idev->mc_ifc_count--; | |
2409 | if (idev->mc_ifc_count) | |
2410 | mld_ifc_start_timer(idev, idev->mc_maxdelay); | |
2411 | } | |
9260d3e1 | 2412 | in6_dev_put(idev); |
1da177e4 LT |
2413 | } |
2414 | ||
2415 | static void mld_ifc_event(struct inet6_dev *idev) | |
2416 | { | |
6c567b78 | 2417 | if (mld_in_v1_mode(idev)) |
1da177e4 LT |
2418 | return; |
2419 | idev->mc_ifc_count = idev->mc_qrv; | |
2420 | mld_ifc_start_timer(idev, 1); | |
2421 | } | |
2422 | ||
2423 | ||
2424 | static void igmp6_timer_handler(unsigned long data) | |
2425 | { | |
2426 | struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data; | |
2427 | ||
6c567b78 | 2428 | if (mld_in_v1_mode(ma->idev)) |
1da177e4 LT |
2429 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); |
2430 | else | |
2431 | mld_send_report(ma->idev, ma); | |
2432 | ||
2433 | spin_lock(&ma->mca_lock); | |
2434 | ma->mca_flags |= MAF_LAST_REPORTER; | |
2435 | ma->mca_flags &= ~MAF_TIMER_RUNNING; | |
2436 | spin_unlock(&ma->mca_lock); | |
2437 | ma_put(ma); | |
2438 | } | |
2439 | ||
75c78500 MS |
2440 | /* Device changing type */ |
2441 | ||
2442 | void ipv6_mc_unmap(struct inet6_dev *idev) | |
2443 | { | |
2444 | struct ifmcaddr6 *i; | |
2445 | ||
2446 | /* Install multicast list, except for all-nodes (already installed) */ | |
2447 | ||
2448 | read_lock_bh(&idev->lock); | |
2449 | for (i = idev->mc_list; i; i = i->next) | |
2450 | igmp6_group_dropped(i); | |
2451 | read_unlock_bh(&idev->lock); | |
2452 | } | |
2453 | ||
2454 | void ipv6_mc_remap(struct inet6_dev *idev) | |
2455 | { | |
2456 | ipv6_mc_up(idev); | |
2457 | } | |
2458 | ||
1da177e4 LT |
2459 | /* Device going down */ |
2460 | ||
2461 | void ipv6_mc_down(struct inet6_dev *idev) | |
2462 | { | |
2463 | struct ifmcaddr6 *i; | |
2464 | ||
2465 | /* Withdraw multicast list */ | |
2466 | ||
2467 | read_lock_bh(&idev->lock); | |
b4af8def DB |
2468 | mld_ifc_stop_timer(idev); |
2469 | mld_gq_stop_timer(idev); | |
2470 | mld_dad_stop_timer(idev); | |
1da177e4 | 2471 | |
67ba4152 | 2472 | for (i = idev->mc_list; i; i = i->next) |
1da177e4 LT |
2473 | igmp6_group_dropped(i); |
2474 | read_unlock_bh(&idev->lock); | |
2475 | ||
2476 | mld_clear_delrec(idev); | |
2477 | } | |
2478 | ||
2f711939 HFS |
2479 | static void ipv6_mc_reset(struct inet6_dev *idev) |
2480 | { | |
2481 | idev->mc_qrv = sysctl_mld_qrv; | |
2482 | idev->mc_qi = MLD_QI_DEFAULT; | |
2483 | idev->mc_qri = MLD_QRI_DEFAULT; | |
2484 | idev->mc_v1_seen = 0; | |
2485 | idev->mc_maxdelay = unsolicited_report_interval(idev); | |
2486 | } | |
1da177e4 LT |
2487 | |
2488 | /* Device going up */ | |
2489 | ||
2490 | void ipv6_mc_up(struct inet6_dev *idev) | |
2491 | { | |
2492 | struct ifmcaddr6 *i; | |
2493 | ||
2494 | /* Install multicast list, except for all-nodes (already installed) */ | |
2495 | ||
2496 | read_lock_bh(&idev->lock); | |
2f711939 | 2497 | ipv6_mc_reset(idev); |
67ba4152 | 2498 | for (i = idev->mc_list; i; i = i->next) |
1da177e4 LT |
2499 | igmp6_group_added(i); |
2500 | read_unlock_bh(&idev->lock); | |
2501 | } | |
2502 | ||
2503 | /* IPv6 device initialization. */ | |
2504 | ||
2505 | void ipv6_mc_init_dev(struct inet6_dev *idev) | |
2506 | { | |
1da177e4 | 2507 | write_lock_bh(&idev->lock); |
6457d26b | 2508 | spin_lock_init(&idev->mc_lock); |
1da177e4 | 2509 | idev->mc_gq_running = 0; |
b24b8a24 PE |
2510 | setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire, |
2511 | (unsigned long)idev); | |
1da177e4 LT |
2512 | idev->mc_tomb = NULL; |
2513 | idev->mc_ifc_count = 0; | |
b24b8a24 PE |
2514 | setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire, |
2515 | (unsigned long)idev); | |
b173ee48 HFS |
2516 | setup_timer(&idev->mc_dad_timer, mld_dad_timer_expire, |
2517 | (unsigned long)idev); | |
2f711939 | 2518 | ipv6_mc_reset(idev); |
1da177e4 | 2519 | write_unlock_bh(&idev->lock); |
1da177e4 LT |
2520 | } |
2521 | ||
2522 | /* | |
2523 | * Device is about to be destroyed: clean up. | |
2524 | */ | |
2525 | ||
2526 | void ipv6_mc_destroy_dev(struct inet6_dev *idev) | |
2527 | { | |
2528 | struct ifmcaddr6 *i; | |
1da177e4 LT |
2529 | |
2530 | /* Deactivate timers */ | |
2531 | ipv6_mc_down(idev); | |
2532 | ||
2533 | /* Delete all-nodes address. */ | |
1da177e4 LT |
2534 | /* We cannot call ipv6_dev_mc_dec() directly, our caller in |
2535 | * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will | |
2536 | * fail. | |
2537 | */ | |
f3ee4010 | 2538 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes); |
1da177e4 | 2539 | |
f3ee4010 YH |
2540 | if (idev->cnf.forwarding) |
2541 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters); | |
1da177e4 LT |
2542 | |
2543 | write_lock_bh(&idev->lock); | |
2544 | while ((i = idev->mc_list) != NULL) { | |
2545 | idev->mc_list = i->next; | |
2546 | write_unlock_bh(&idev->lock); | |
2547 | ||
2548 | igmp6_group_dropped(i); | |
2549 | ma_put(i); | |
2550 | ||
2551 | write_lock_bh(&idev->lock); | |
2552 | } | |
2553 | write_unlock_bh(&idev->lock); | |
2554 | } | |
2555 | ||
2556 | #ifdef CONFIG_PROC_FS | |
2557 | struct igmp6_mc_iter_state { | |
b8ad0cbc | 2558 | struct seq_net_private p; |
1da177e4 LT |
2559 | struct net_device *dev; |
2560 | struct inet6_dev *idev; | |
2561 | }; | |
2562 | ||
2563 | #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private) | |
2564 | ||
2565 | static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq) | |
2566 | { | |
2567 | struct ifmcaddr6 *im = NULL; | |
2568 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
1218854a | 2569 | struct net *net = seq_file_net(seq); |
1da177e4 | 2570 | |
7562f876 | 2571 | state->idev = NULL; |
ce81b76a | 2572 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2573 | struct inet6_dev *idev; |
ce81b76a | 2574 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2575 | if (!idev) |
2576 | continue; | |
2577 | read_lock_bh(&idev->lock); | |
2578 | im = idev->mc_list; | |
2579 | if (im) { | |
2580 | state->idev = idev; | |
2581 | break; | |
2582 | } | |
2583 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2584 | } |
2585 | return im; | |
2586 | } | |
2587 | ||
2588 | static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im) | |
2589 | { | |
2590 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2591 | ||
2592 | im = im->next; | |
2593 | while (!im) { | |
ce81b76a | 2594 | if (likely(state->idev != NULL)) |
1da177e4 | 2595 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2596 | |
2597 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2598 | if (!state->dev) { |
2599 | state->idev = NULL; | |
2600 | break; | |
2601 | } | |
ce81b76a | 2602 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2603 | if (!state->idev) |
2604 | continue; | |
2605 | read_lock_bh(&state->idev->lock); | |
2606 | im = state->idev->mc_list; | |
2607 | } | |
2608 | return im; | |
2609 | } | |
2610 | ||
2611 | static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos) | |
2612 | { | |
2613 | struct ifmcaddr6 *im = igmp6_mc_get_first(seq); | |
2614 | if (im) | |
2615 | while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL) | |
2616 | --pos; | |
2617 | return pos ? NULL : im; | |
2618 | } | |
2619 | ||
2620 | static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2621 | __acquires(RCU) |
1da177e4 | 2622 | { |
ce81b76a | 2623 | rcu_read_lock(); |
1da177e4 LT |
2624 | return igmp6_mc_get_idx(seq, *pos); |
2625 | } | |
2626 | ||
2627 | static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2628 | { | |
ce81b76a ED |
2629 | struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v); |
2630 | ||
1da177e4 LT |
2631 | ++*pos; |
2632 | return im; | |
2633 | } | |
2634 | ||
2635 | static void igmp6_mc_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2636 | __releases(RCU) |
1da177e4 LT |
2637 | { |
2638 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
ce81b76a | 2639 | |
1da177e4 LT |
2640 | if (likely(state->idev != NULL)) { |
2641 | read_unlock_bh(&state->idev->lock); | |
1da177e4 LT |
2642 | state->idev = NULL; |
2643 | } | |
2644 | state->dev = NULL; | |
ce81b76a | 2645 | rcu_read_unlock(); |
1da177e4 LT |
2646 | } |
2647 | ||
2648 | static int igmp6_mc_seq_show(struct seq_file *seq, void *v) | |
2649 | { | |
2650 | struct ifmcaddr6 *im = (struct ifmcaddr6 *)v; | |
2651 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2652 | ||
2653 | seq_printf(seq, | |
4b7a4274 | 2654 | "%-4d %-15s %pi6 %5d %08X %ld\n", |
1da177e4 | 2655 | state->dev->ifindex, state->dev->name, |
b071195d | 2656 | &im->mca_addr, |
1da177e4 LT |
2657 | im->mca_users, im->mca_flags, |
2658 | (im->mca_flags&MAF_TIMER_RUNNING) ? | |
2659 | jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0); | |
2660 | return 0; | |
2661 | } | |
2662 | ||
56b3d975 | 2663 | static const struct seq_operations igmp6_mc_seq_ops = { |
1da177e4 LT |
2664 | .start = igmp6_mc_seq_start, |
2665 | .next = igmp6_mc_seq_next, | |
2666 | .stop = igmp6_mc_seq_stop, | |
2667 | .show = igmp6_mc_seq_show, | |
2668 | }; | |
2669 | ||
2670 | static int igmp6_mc_seq_open(struct inode *inode, struct file *file) | |
2671 | { | |
b8ad0cbc DL |
2672 | return seq_open_net(inode, file, &igmp6_mc_seq_ops, |
2673 | sizeof(struct igmp6_mc_iter_state)); | |
1da177e4 LT |
2674 | } |
2675 | ||
9a32144e | 2676 | static const struct file_operations igmp6_mc_seq_fops = { |
1da177e4 LT |
2677 | .owner = THIS_MODULE, |
2678 | .open = igmp6_mc_seq_open, | |
2679 | .read = seq_read, | |
2680 | .llseek = seq_lseek, | |
b8ad0cbc | 2681 | .release = seq_release_net, |
1da177e4 LT |
2682 | }; |
2683 | ||
2684 | struct igmp6_mcf_iter_state { | |
b8ad0cbc | 2685 | struct seq_net_private p; |
1da177e4 LT |
2686 | struct net_device *dev; |
2687 | struct inet6_dev *idev; | |
2688 | struct ifmcaddr6 *im; | |
2689 | }; | |
2690 | ||
2691 | #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private) | |
2692 | ||
2693 | static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq) | |
2694 | { | |
2695 | struct ip6_sf_list *psf = NULL; | |
2696 | struct ifmcaddr6 *im = NULL; | |
2697 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
1218854a | 2698 | struct net *net = seq_file_net(seq); |
1da177e4 | 2699 | |
7562f876 PE |
2700 | state->idev = NULL; |
2701 | state->im = NULL; | |
ce81b76a | 2702 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2703 | struct inet6_dev *idev; |
ce81b76a | 2704 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2705 | if (unlikely(idev == NULL)) |
2706 | continue; | |
2707 | read_lock_bh(&idev->lock); | |
2708 | im = idev->mc_list; | |
2709 | if (likely(im != NULL)) { | |
2710 | spin_lock_bh(&im->mca_lock); | |
2711 | psf = im->mca_sources; | |
2712 | if (likely(psf != NULL)) { | |
2713 | state->im = im; | |
2714 | state->idev = idev; | |
2715 | break; | |
2716 | } | |
2717 | spin_unlock_bh(&im->mca_lock); | |
2718 | } | |
2719 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2720 | } |
2721 | return psf; | |
2722 | } | |
2723 | ||
2724 | static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf) | |
2725 | { | |
2726 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2727 | ||
2728 | psf = psf->sf_next; | |
2729 | while (!psf) { | |
2730 | spin_unlock_bh(&state->im->mca_lock); | |
2731 | state->im = state->im->next; | |
2732 | while (!state->im) { | |
ce81b76a | 2733 | if (likely(state->idev != NULL)) |
1da177e4 | 2734 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2735 | |
2736 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2737 | if (!state->dev) { |
2738 | state->idev = NULL; | |
2739 | goto out; | |
2740 | } | |
ce81b76a | 2741 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2742 | if (!state->idev) |
2743 | continue; | |
2744 | read_lock_bh(&state->idev->lock); | |
2745 | state->im = state->idev->mc_list; | |
2746 | } | |
2747 | if (!state->im) | |
2748 | break; | |
2749 | spin_lock_bh(&state->im->mca_lock); | |
2750 | psf = state->im->mca_sources; | |
2751 | } | |
2752 | out: | |
2753 | return psf; | |
2754 | } | |
2755 | ||
2756 | static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos) | |
2757 | { | |
2758 | struct ip6_sf_list *psf = igmp6_mcf_get_first(seq); | |
2759 | if (psf) | |
2760 | while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL) | |
2761 | --pos; | |
2762 | return pos ? NULL : psf; | |
2763 | } | |
2764 | ||
2765 | static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2766 | __acquires(RCU) |
1da177e4 | 2767 | { |
ce81b76a | 2768 | rcu_read_lock(); |
1da177e4 LT |
2769 | return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
2770 | } | |
2771 | ||
2772 | static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2773 | { | |
2774 | struct ip6_sf_list *psf; | |
2775 | if (v == SEQ_START_TOKEN) | |
2776 | psf = igmp6_mcf_get_first(seq); | |
2777 | else | |
2778 | psf = igmp6_mcf_get_next(seq, v); | |
2779 | ++*pos; | |
2780 | return psf; | |
2781 | } | |
2782 | ||
2783 | static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2784 | __releases(RCU) |
1da177e4 LT |
2785 | { |
2786 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2787 | if (likely(state->im != NULL)) { | |
2788 | spin_unlock_bh(&state->im->mca_lock); | |
2789 | state->im = NULL; | |
2790 | } | |
2791 | if (likely(state->idev != NULL)) { | |
2792 | read_unlock_bh(&state->idev->lock); | |
1da177e4 LT |
2793 | state->idev = NULL; |
2794 | } | |
2795 | state->dev = NULL; | |
ce81b76a | 2796 | rcu_read_unlock(); |
1da177e4 LT |
2797 | } |
2798 | ||
2799 | static int igmp6_mcf_seq_show(struct seq_file *seq, void *v) | |
2800 | { | |
2801 | struct ip6_sf_list *psf = (struct ip6_sf_list *)v; | |
2802 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2803 | ||
2804 | if (v == SEQ_START_TOKEN) { | |
1ab1457c | 2805 | seq_printf(seq, |
1da177e4 | 2806 | "%3s %6s " |
9343e79a | 2807 | "%32s %32s %6s %6s\n", "Idx", |
1da177e4 LT |
2808 | "Device", "Multicast Address", |
2809 | "Source Address", "INC", "EXC"); | |
2810 | } else { | |
2811 | seq_printf(seq, | |
4b7a4274 | 2812 | "%3d %6.6s %pi6 %pi6 %6lu %6lu\n", |
1da177e4 | 2813 | state->dev->ifindex, state->dev->name, |
b071195d HH |
2814 | &state->im->mca_addr, |
2815 | &psf->sf_addr, | |
1da177e4 LT |
2816 | psf->sf_count[MCAST_INCLUDE], |
2817 | psf->sf_count[MCAST_EXCLUDE]); | |
2818 | } | |
2819 | return 0; | |
2820 | } | |
2821 | ||
56b3d975 | 2822 | static const struct seq_operations igmp6_mcf_seq_ops = { |
1da177e4 LT |
2823 | .start = igmp6_mcf_seq_start, |
2824 | .next = igmp6_mcf_seq_next, | |
2825 | .stop = igmp6_mcf_seq_stop, | |
2826 | .show = igmp6_mcf_seq_show, | |
2827 | }; | |
2828 | ||
2829 | static int igmp6_mcf_seq_open(struct inode *inode, struct file *file) | |
2830 | { | |
b8ad0cbc DL |
2831 | return seq_open_net(inode, file, &igmp6_mcf_seq_ops, |
2832 | sizeof(struct igmp6_mcf_iter_state)); | |
1da177e4 LT |
2833 | } |
2834 | ||
9a32144e | 2835 | static const struct file_operations igmp6_mcf_seq_fops = { |
1da177e4 LT |
2836 | .owner = THIS_MODULE, |
2837 | .open = igmp6_mcf_seq_open, | |
2838 | .read = seq_read, | |
2839 | .llseek = seq_lseek, | |
b8ad0cbc | 2840 | .release = seq_release_net, |
1da177e4 | 2841 | }; |
ea82edf7 | 2842 | |
2c8c1e72 | 2843 | static int __net_init igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2844 | { |
2845 | int err; | |
2846 | ||
2847 | err = -ENOMEM; | |
d4beaa66 | 2848 | if (!proc_create("igmp6", S_IRUGO, net->proc_net, &igmp6_mc_seq_fops)) |
ea82edf7 | 2849 | goto out; |
d4beaa66 G |
2850 | if (!proc_create("mcfilter6", S_IRUGO, net->proc_net, |
2851 | &igmp6_mcf_seq_fops)) | |
ea82edf7 DL |
2852 | goto out_proc_net_igmp6; |
2853 | ||
2854 | err = 0; | |
2855 | out: | |
2856 | return err; | |
2857 | ||
2858 | out_proc_net_igmp6: | |
ece31ffd | 2859 | remove_proc_entry("igmp6", net->proc_net); |
ea82edf7 DL |
2860 | goto out; |
2861 | } | |
2862 | ||
2c8c1e72 | 2863 | static void __net_exit igmp6_proc_exit(struct net *net) |
ea82edf7 | 2864 | { |
ece31ffd G |
2865 | remove_proc_entry("mcfilter6", net->proc_net); |
2866 | remove_proc_entry("igmp6", net->proc_net); | |
ea82edf7 DL |
2867 | } |
2868 | #else | |
2c8c1e72 | 2869 | static inline int igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2870 | { |
2871 | return 0; | |
2872 | } | |
2c8c1e72 | 2873 | static inline void igmp6_proc_exit(struct net *net) |
ea82edf7 | 2874 | { |
ea82edf7 | 2875 | } |
1da177e4 LT |
2876 | #endif |
2877 | ||
2c8c1e72 | 2878 | static int __net_init igmp6_net_init(struct net *net) |
1da177e4 | 2879 | { |
1da177e4 LT |
2880 | int err; |
2881 | ||
1ed8516f DL |
2882 | err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6, |
2883 | SOCK_RAW, IPPROTO_ICMPV6, net); | |
1da177e4 | 2884 | if (err < 0) { |
f3213831 | 2885 | pr_err("Failed to initialize the IGMP6 control socket (err %d)\n", |
1da177e4 | 2886 | err); |
b8ad0cbc | 2887 | goto out; |
1da177e4 LT |
2888 | } |
2889 | ||
1ed8516f | 2890 | inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1; |
1da177e4 | 2891 | |
ea82edf7 DL |
2892 | err = igmp6_proc_init(net); |
2893 | if (err) | |
b8ad0cbc | 2894 | goto out_sock_create; |
b8ad0cbc DL |
2895 | out: |
2896 | return err; | |
2897 | ||
2898 | out_sock_create: | |
1ed8516f | 2899 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
b8ad0cbc | 2900 | goto out; |
1da177e4 LT |
2901 | } |
2902 | ||
2c8c1e72 | 2903 | static void __net_exit igmp6_net_exit(struct net *net) |
1da177e4 | 2904 | { |
1ed8516f | 2905 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
ea82edf7 | 2906 | igmp6_proc_exit(net); |
1da177e4 | 2907 | } |
b8ad0cbc DL |
2908 | |
2909 | static struct pernet_operations igmp6_net_ops = { | |
2910 | .init = igmp6_net_init, | |
2911 | .exit = igmp6_net_exit, | |
2912 | }; | |
2913 | ||
2914 | int __init igmp6_init(void) | |
2915 | { | |
2916 | return register_pernet_subsys(&igmp6_net_ops); | |
2917 | } | |
2918 | ||
2919 | void igmp6_cleanup(void) | |
2920 | { | |
2921 | unregister_pernet_subsys(&igmp6_net_ops); | |
2922 | } |