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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Multicast support for IPv6 | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 | 7 | * |
1ab1457c | 8 | * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c |
1da177e4 LT |
9 | * |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | ||
16 | /* Changes: | |
17 | * | |
18 | * yoshfuji : fix format of router-alert option | |
19 | * YOSHIFUJI Hideaki @USAGI: | |
20 | * Fixed source address for MLD message based on | |
21 | * <draft-ietf-magma-mld-source-05.txt>. | |
22 | * YOSHIFUJI Hideaki @USAGI: | |
23 | * - Ignore Queries for invalid addresses. | |
24 | * - MLD for link-local addresses. | |
25 | * David L Stevens <dlstevens@us.ibm.com>: | |
26 | * - MLDv2 support | |
27 | */ | |
28 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/errno.h> | |
31 | #include <linux/types.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/socket.h> | |
34 | #include <linux/sockios.h> | |
35 | #include <linux/jiffies.h> | |
36 | #include <linux/times.h> | |
37 | #include <linux/net.h> | |
38 | #include <linux/in.h> | |
39 | #include <linux/in6.h> | |
40 | #include <linux/netdevice.h> | |
41 | #include <linux/if_arp.h> | |
42 | #include <linux/route.h> | |
43 | #include <linux/init.h> | |
44 | #include <linux/proc_fs.h> | |
45 | #include <linux/seq_file.h> | |
5a0e3ad6 | 46 | #include <linux/slab.h> |
6e7cb837 | 47 | #include <net/mld.h> |
1da177e4 LT |
48 | |
49 | #include <linux/netfilter.h> | |
50 | #include <linux/netfilter_ipv6.h> | |
51 | ||
457c4cbc | 52 | #include <net/net_namespace.h> |
1da177e4 LT |
53 | #include <net/sock.h> |
54 | #include <net/snmp.h> | |
55 | ||
56 | #include <net/ipv6.h> | |
57 | #include <net/protocol.h> | |
58 | #include <net/if_inet6.h> | |
59 | #include <net/ndisc.h> | |
60 | #include <net/addrconf.h> | |
61 | #include <net/ip6_route.h> | |
1ed8516f | 62 | #include <net/inet_common.h> |
1da177e4 LT |
63 | |
64 | #include <net/ip6_checksum.h> | |
65 | ||
66 | /* Set to 3 to get tracing... */ | |
67 | #define MCAST_DEBUG 2 | |
68 | ||
69 | #if MCAST_DEBUG >= 3 | |
70 | #define MDBG(x) printk x | |
71 | #else | |
72 | #define MDBG(x) | |
73 | #endif | |
74 | ||
6e7cb837 YH |
75 | /* Ensure that we have struct in6_addr aligned on 32bit word. */ |
76 | static void *__mld2_query_bugs[] __attribute__((__unused__)) = { | |
77 | BUILD_BUG_ON_NULL(offsetof(struct mld2_query, mld2q_srcs) % 4), | |
78 | BUILD_BUG_ON_NULL(offsetof(struct mld2_report, mld2r_grec) % 4), | |
79 | BUILD_BUG_ON_NULL(offsetof(struct mld2_grec, grec_mca) % 4) | |
1da177e4 LT |
80 | }; |
81 | ||
82 | static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT; | |
83 | ||
84 | /* Big mc list lock for all the sockets */ | |
456b61bc | 85 | static DEFINE_SPINLOCK(ipv6_sk_mc_lock); |
1da177e4 | 86 | |
1da177e4 LT |
87 | static void igmp6_join_group(struct ifmcaddr6 *ma); |
88 | static void igmp6_leave_group(struct ifmcaddr6 *ma); | |
89 | static void igmp6_timer_handler(unsigned long data); | |
90 | ||
91 | static void mld_gq_timer_expire(unsigned long data); | |
92 | static void mld_ifc_timer_expire(unsigned long data); | |
93 | static void mld_ifc_event(struct inet6_dev *idev); | |
94 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc); | |
95 | static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *addr); | |
96 | static void mld_clear_delrec(struct inet6_dev *idev); | |
97 | static int sf_setstate(struct ifmcaddr6 *pmc); | |
98 | static void sf_markstate(struct ifmcaddr6 *pmc); | |
99 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc); | |
100 | static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
101 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
102 | int delta); | |
103 | static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
104 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
105 | int delta); | |
106 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
107 | struct inet6_dev *idev); | |
108 | ||
109 | ||
110 | #define IGMP6_UNSOLICITED_IVAL (10*HZ) | |
111 | #define MLD_QRV_DEFAULT 2 | |
112 | ||
53b7997f | 113 | #define MLD_V1_SEEN(idev) (dev_net((idev)->dev)->ipv6.devconf_all->force_mld_version == 1 || \ |
1da177e4 LT |
114 | (idev)->cnf.force_mld_version == 1 || \ |
115 | ((idev)->mc_v1_seen && \ | |
116 | time_before(jiffies, (idev)->mc_v1_seen))) | |
117 | ||
6f4353d8 | 118 | #define IPV6_MLD_MAX_MSF 64 |
1da177e4 | 119 | |
ab32ea5d | 120 | int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF; |
1da177e4 LT |
121 | |
122 | /* | |
123 | * socket join on multicast group | |
124 | */ | |
125 | ||
456b61bc ED |
126 | #define for_each_pmc_rcu(np, pmc) \ |
127 | for (pmc = rcu_dereference(np->ipv6_mc_list); \ | |
128 | pmc != NULL; \ | |
129 | pmc = rcu_dereference(pmc->next)) | |
130 | ||
9acd9f3a | 131 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) |
1da177e4 LT |
132 | { |
133 | struct net_device *dev = NULL; | |
134 | struct ipv6_mc_socklist *mc_lst; | |
135 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 136 | struct net *net = sock_net(sk); |
1da177e4 LT |
137 | int err; |
138 | ||
139 | if (!ipv6_addr_is_multicast(addr)) | |
140 | return -EINVAL; | |
141 | ||
456b61bc ED |
142 | rcu_read_lock(); |
143 | for_each_pmc_rcu(np, mc_lst) { | |
c9e3e8b6 DS |
144 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
145 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
456b61bc | 146 | rcu_read_unlock(); |
c9e3e8b6 DS |
147 | return -EADDRINUSE; |
148 | } | |
149 | } | |
456b61bc | 150 | rcu_read_unlock(); |
c9e3e8b6 | 151 | |
1da177e4 LT |
152 | mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL); |
153 | ||
154 | if (mc_lst == NULL) | |
155 | return -ENOMEM; | |
156 | ||
157 | mc_lst->next = NULL; | |
158 | ipv6_addr_copy(&mc_lst->addr, addr); | |
159 | ||
96b52e61 | 160 | rcu_read_lock(); |
1da177e4 LT |
161 | if (ifindex == 0) { |
162 | struct rt6_info *rt; | |
b8ad0cbc | 163 | rt = rt6_lookup(net, addr, NULL, 0, 0); |
1da177e4 LT |
164 | if (rt) { |
165 | dev = rt->rt6i_dev; | |
d8d1f30b | 166 | dst_release(&rt->dst); |
1da177e4 LT |
167 | } |
168 | } else | |
96b52e61 | 169 | dev = dev_get_by_index_rcu(net, ifindex); |
1da177e4 LT |
170 | |
171 | if (dev == NULL) { | |
96b52e61 | 172 | rcu_read_unlock(); |
1da177e4 LT |
173 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
174 | return -ENODEV; | |
175 | } | |
176 | ||
177 | mc_lst->ifindex = dev->ifindex; | |
178 | mc_lst->sfmode = MCAST_EXCLUDE; | |
196433c5 | 179 | rwlock_init(&mc_lst->sflock); |
1da177e4 LT |
180 | mc_lst->sflist = NULL; |
181 | ||
182 | /* | |
183 | * now add/increase the group membership on the device | |
184 | */ | |
185 | ||
186 | err = ipv6_dev_mc_inc(dev, addr); | |
187 | ||
188 | if (err) { | |
96b52e61 | 189 | rcu_read_unlock(); |
1da177e4 | 190 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
1da177e4 LT |
191 | return err; |
192 | } | |
193 | ||
456b61bc | 194 | spin_lock(&ipv6_sk_mc_lock); |
1da177e4 | 195 | mc_lst->next = np->ipv6_mc_list; |
456b61bc ED |
196 | rcu_assign_pointer(np->ipv6_mc_list, mc_lst); |
197 | spin_unlock(&ipv6_sk_mc_lock); | |
1da177e4 | 198 | |
96b52e61 | 199 | rcu_read_unlock(); |
1da177e4 LT |
200 | |
201 | return 0; | |
202 | } | |
203 | ||
456b61bc ED |
204 | static void ipv6_mc_socklist_reclaim(struct rcu_head *head) |
205 | { | |
206 | kfree(container_of(head, struct ipv6_mc_socklist, rcu)); | |
207 | } | |
1da177e4 LT |
208 | /* |
209 | * socket leave on multicast group | |
210 | */ | |
9acd9f3a | 211 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) |
1da177e4 LT |
212 | { |
213 | struct ipv6_pinfo *np = inet6_sk(sk); | |
456b61bc ED |
214 | struct ipv6_mc_socklist *mc_lst; |
215 | struct ipv6_mc_socklist __rcu **lnk; | |
3b1e0a65 | 216 | struct net *net = sock_net(sk); |
1da177e4 | 217 | |
456b61bc ED |
218 | spin_lock(&ipv6_sk_mc_lock); |
219 | for (lnk = &np->ipv6_mc_list; | |
220 | (mc_lst = rcu_dereference_protected(*lnk, | |
221 | lockdep_is_held(&ipv6_sk_mc_lock))) !=NULL ; | |
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; | |
456b61bc | 228 | spin_unlock(&ipv6_sk_mc_lock); |
1da177e4 | 229 | |
96b52e61 ED |
230 | rcu_read_lock(); |
231 | dev = dev_get_by_index_rcu(net, mc_lst->ifindex); | |
b8ad0cbc | 232 | if (dev != NULL) { |
96b52e61 | 233 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 234 | |
acd6e00b | 235 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 236 | if (idev) |
1da177e4 | 237 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
238 | } else |
239 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
96b52e61 | 240 | rcu_read_unlock(); |
456b61bc ED |
241 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
242 | call_rcu(&mc_lst->rcu, ipv6_mc_socklist_reclaim); | |
1da177e4 LT |
243 | return 0; |
244 | } | |
245 | } | |
456b61bc | 246 | spin_unlock(&ipv6_sk_mc_lock); |
1da177e4 | 247 | |
9951f036 | 248 | return -EADDRNOTAVAIL; |
1da177e4 LT |
249 | } |
250 | ||
96b52e61 ED |
251 | /* called with rcu_read_lock() */ |
252 | static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net, | |
253 | struct in6_addr *group, | |
254 | int ifindex) | |
1da177e4 LT |
255 | { |
256 | struct net_device *dev = NULL; | |
257 | struct inet6_dev *idev = NULL; | |
258 | ||
259 | if (ifindex == 0) { | |
96b52e61 | 260 | struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0); |
1da177e4 | 261 | |
1da177e4 LT |
262 | if (rt) { |
263 | dev = rt->rt6i_dev; | |
264 | dev_hold(dev); | |
d8d1f30b | 265 | dst_release(&rt->dst); |
1da177e4 LT |
266 | } |
267 | } else | |
96b52e61 | 268 | dev = dev_get_by_index_rcu(net, ifindex); |
1da177e4 LT |
269 | |
270 | if (!dev) | |
96b52e61 ED |
271 | return NULL; |
272 | idev = __in6_dev_get(dev); | |
448eb71f | 273 | if (!idev) |
8a22c99a | 274 | return NULL; |
1da177e4 | 275 | read_lock_bh(&idev->lock); |
96b52e61 ED |
276 | if (idev->dead) { |
277 | read_unlock_bh(&idev->lock); | |
278 | return NULL; | |
279 | } | |
1da177e4 LT |
280 | return idev; |
281 | } | |
282 | ||
283 | void ipv6_sock_mc_close(struct sock *sk) | |
284 | { | |
285 | struct ipv6_pinfo *np = inet6_sk(sk); | |
286 | struct ipv6_mc_socklist *mc_lst; | |
3b1e0a65 | 287 | struct net *net = sock_net(sk); |
1da177e4 | 288 | |
456b61bc ED |
289 | spin_lock(&ipv6_sk_mc_lock); |
290 | while ((mc_lst = rcu_dereference_protected(np->ipv6_mc_list, | |
291 | lockdep_is_held(&ipv6_sk_mc_lock))) != NULL) { | |
1da177e4 LT |
292 | struct net_device *dev; |
293 | ||
294 | np->ipv6_mc_list = mc_lst->next; | |
456b61bc | 295 | spin_unlock(&ipv6_sk_mc_lock); |
1da177e4 | 296 | |
96b52e61 ED |
297 | rcu_read_lock(); |
298 | dev = dev_get_by_index_rcu(net, mc_lst->ifindex); | |
1da177e4 | 299 | if (dev) { |
96b52e61 | 300 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 301 | |
acd6e00b | 302 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 303 | if (idev) |
1da177e4 | 304 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
305 | } else |
306 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
96b52e61 | 307 | rcu_read_unlock(); |
1da177e4 | 308 | |
456b61bc ED |
309 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
310 | call_rcu(&mc_lst->rcu, ipv6_mc_socklist_reclaim); | |
311 | ||
312 | spin_lock(&ipv6_sk_mc_lock); | |
1da177e4 | 313 | } |
456b61bc | 314 | spin_unlock(&ipv6_sk_mc_lock); |
1da177e4 LT |
315 | } |
316 | ||
317 | int ip6_mc_source(int add, int omode, struct sock *sk, | |
318 | struct group_source_req *pgsr) | |
319 | { | |
320 | struct in6_addr *source, *group; | |
321 | struct ipv6_mc_socklist *pmc; | |
1da177e4 LT |
322 | struct inet6_dev *idev; |
323 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
324 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 325 | struct net *net = sock_net(sk); |
1da177e4 | 326 | int i, j, rv; |
c9e3e8b6 | 327 | int leavegroup = 0; |
5ab4a6c8 | 328 | int pmclocked = 0; |
1da177e4 LT |
329 | int err; |
330 | ||
1da177e4 LT |
331 | source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr; |
332 | group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr; | |
333 | ||
334 | if (!ipv6_addr_is_multicast(group)) | |
335 | return -EINVAL; | |
336 | ||
96b52e61 ED |
337 | rcu_read_lock(); |
338 | idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface); | |
339 | if (!idev) { | |
340 | rcu_read_unlock(); | |
1da177e4 | 341 | return -ENODEV; |
96b52e61 | 342 | } |
1da177e4 LT |
343 | |
344 | err = -EADDRNOTAVAIL; | |
345 | ||
456b61bc | 346 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
347 | if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface) |
348 | continue; | |
349 | if (ipv6_addr_equal(&pmc->addr, group)) | |
350 | break; | |
351 | } | |
917f2f10 DS |
352 | if (!pmc) { /* must have a prior join */ |
353 | err = -EINVAL; | |
1da177e4 | 354 | goto done; |
917f2f10 | 355 | } |
1da177e4 LT |
356 | /* if a source filter was set, must be the same mode as before */ |
357 | if (pmc->sflist) { | |
917f2f10 DS |
358 | if (pmc->sfmode != omode) { |
359 | err = -EINVAL; | |
1da177e4 | 360 | goto done; |
917f2f10 | 361 | } |
1da177e4 LT |
362 | } else if (pmc->sfmode != omode) { |
363 | /* allow mode switches for empty-set filters */ | |
364 | ip6_mc_add_src(idev, group, omode, 0, NULL, 0); | |
365 | ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
366 | pmc->sfmode = omode; | |
367 | } | |
368 | ||
96b52e61 | 369 | write_lock(&pmc->sflock); |
5ab4a6c8 DS |
370 | pmclocked = 1; |
371 | ||
1da177e4 LT |
372 | psl = pmc->sflist; |
373 | if (!add) { | |
374 | if (!psl) | |
917f2f10 | 375 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 LT |
376 | rv = !0; |
377 | for (i=0; i<psl->sl_count; i++) { | |
378 | rv = memcmp(&psl->sl_addr[i], source, | |
379 | sizeof(struct in6_addr)); | |
380 | if (rv == 0) | |
381 | break; | |
382 | } | |
383 | if (rv) /* source not found */ | |
917f2f10 | 384 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 385 | |
c9e3e8b6 DS |
386 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
387 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { | |
388 | leavegroup = 1; | |
389 | goto done; | |
390 | } | |
391 | ||
1da177e4 LT |
392 | /* update the interface filter */ |
393 | ip6_mc_del_src(idev, group, omode, 1, source, 1); | |
394 | ||
395 | for (j=i+1; j<psl->sl_count; j++) | |
396 | psl->sl_addr[j-1] = psl->sl_addr[j]; | |
397 | psl->sl_count--; | |
398 | err = 0; | |
399 | goto done; | |
400 | } | |
401 | /* else, add a new source to the filter */ | |
402 | ||
403 | if (psl && psl->sl_count >= sysctl_mld_max_msf) { | |
404 | err = -ENOBUFS; | |
405 | goto done; | |
406 | } | |
407 | if (!psl || psl->sl_count == psl->sl_max) { | |
408 | struct ip6_sf_socklist *newpsl; | |
409 | int count = IP6_SFBLOCK; | |
410 | ||
411 | if (psl) | |
412 | count += psl->sl_max; | |
8b3a7005 | 413 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC); |
1da177e4 LT |
414 | if (!newpsl) { |
415 | err = -ENOBUFS; | |
416 | goto done; | |
417 | } | |
418 | newpsl->sl_max = count; | |
419 | newpsl->sl_count = count - IP6_SFBLOCK; | |
420 | if (psl) { | |
421 | for (i=0; i<psl->sl_count; i++) | |
422 | newpsl->sl_addr[i] = psl->sl_addr[i]; | |
423 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
424 | } | |
425 | pmc->sflist = psl = newpsl; | |
426 | } | |
427 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ | |
428 | for (i=0; i<psl->sl_count; i++) { | |
429 | rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr)); | |
430 | if (rv == 0) | |
431 | break; | |
432 | } | |
433 | if (rv == 0) /* address already there is an error */ | |
434 | goto done; | |
435 | for (j=psl->sl_count-1; j>=i; j--) | |
436 | psl->sl_addr[j+1] = psl->sl_addr[j]; | |
437 | psl->sl_addr[i] = *source; | |
438 | psl->sl_count++; | |
439 | err = 0; | |
440 | /* update the interface list */ | |
441 | ip6_mc_add_src(idev, group, omode, 1, source, 1); | |
442 | done: | |
5ab4a6c8 | 443 | if (pmclocked) |
96b52e61 | 444 | write_unlock(&pmc->sflock); |
1da177e4 | 445 | read_unlock_bh(&idev->lock); |
96b52e61 | 446 | rcu_read_unlock(); |
c9e3e8b6 DS |
447 | if (leavegroup) |
448 | return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group); | |
1da177e4 LT |
449 | return err; |
450 | } | |
451 | ||
452 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) | |
453 | { | |
454 | struct in6_addr *group; | |
455 | struct ipv6_mc_socklist *pmc; | |
1da177e4 LT |
456 | struct inet6_dev *idev; |
457 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
458 | struct ip6_sf_socklist *newpsl, *psl; | |
3b1e0a65 | 459 | struct net *net = sock_net(sk); |
9951f036 | 460 | int leavegroup = 0; |
1da177e4 LT |
461 | int i, err; |
462 | ||
463 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
464 | ||
465 | if (!ipv6_addr_is_multicast(group)) | |
466 | return -EINVAL; | |
467 | if (gsf->gf_fmode != MCAST_INCLUDE && | |
468 | gsf->gf_fmode != MCAST_EXCLUDE) | |
469 | return -EINVAL; | |
470 | ||
96b52e61 ED |
471 | rcu_read_lock(); |
472 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 473 | |
96b52e61 ED |
474 | if (!idev) { |
475 | rcu_read_unlock(); | |
1da177e4 | 476 | return -ENODEV; |
96b52e61 | 477 | } |
1da177e4 | 478 | |
9c05989b | 479 | err = 0; |
5ab4a6c8 | 480 | |
9951f036 DS |
481 | if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) { |
482 | leavegroup = 1; | |
483 | goto done; | |
484 | } | |
485 | ||
456b61bc | 486 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
487 | if (pmc->ifindex != gsf->gf_interface) |
488 | continue; | |
489 | if (ipv6_addr_equal(&pmc->addr, group)) | |
490 | break; | |
491 | } | |
917f2f10 DS |
492 | if (!pmc) { /* must have a prior join */ |
493 | err = -EINVAL; | |
1da177e4 | 494 | goto done; |
917f2f10 | 495 | } |
1da177e4 | 496 | if (gsf->gf_numsrc) { |
8b3a7005 KK |
497 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc), |
498 | GFP_ATOMIC); | |
1da177e4 LT |
499 | if (!newpsl) { |
500 | err = -ENOBUFS; | |
501 | goto done; | |
502 | } | |
503 | newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc; | |
504 | for (i=0; i<newpsl->sl_count; ++i) { | |
505 | struct sockaddr_in6 *psin6; | |
506 | ||
507 | psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i]; | |
508 | newpsl->sl_addr[i] = psin6->sin6_addr; | |
509 | } | |
510 | err = ip6_mc_add_src(idev, group, gsf->gf_fmode, | |
511 | newpsl->sl_count, newpsl->sl_addr, 0); | |
512 | if (err) { | |
513 | sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); | |
514 | goto done; | |
515 | } | |
8713dbf0 | 516 | } else { |
1da177e4 | 517 | newpsl = NULL; |
8713dbf0 YZ |
518 | (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); |
519 | } | |
5ab4a6c8 | 520 | |
96b52e61 | 521 | write_lock(&pmc->sflock); |
1da177e4 LT |
522 | psl = pmc->sflist; |
523 | if (psl) { | |
524 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, | |
525 | psl->sl_count, psl->sl_addr, 0); | |
526 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
527 | } else | |
528 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
529 | pmc->sflist = newpsl; | |
530 | pmc->sfmode = gsf->gf_fmode; | |
96b52e61 | 531 | write_unlock(&pmc->sflock); |
917f2f10 | 532 | err = 0; |
1da177e4 LT |
533 | done: |
534 | read_unlock_bh(&idev->lock); | |
96b52e61 | 535 | rcu_read_unlock(); |
9951f036 DS |
536 | if (leavegroup) |
537 | err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group); | |
1da177e4 LT |
538 | return err; |
539 | } | |
540 | ||
541 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
542 | struct group_filter __user *optval, int __user *optlen) | |
543 | { | |
544 | int err, i, count, copycount; | |
545 | struct in6_addr *group; | |
546 | struct ipv6_mc_socklist *pmc; | |
547 | struct inet6_dev *idev; | |
1da177e4 LT |
548 | struct ipv6_pinfo *inet6 = inet6_sk(sk); |
549 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 550 | struct net *net = sock_net(sk); |
1da177e4 LT |
551 | |
552 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
553 | ||
554 | if (!ipv6_addr_is_multicast(group)) | |
555 | return -EINVAL; | |
556 | ||
96b52e61 ED |
557 | rcu_read_lock(); |
558 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 559 | |
96b52e61 ED |
560 | if (!idev) { |
561 | rcu_read_unlock(); | |
1da177e4 | 562 | return -ENODEV; |
96b52e61 | 563 | } |
1da177e4 LT |
564 | |
565 | err = -EADDRNOTAVAIL; | |
5ab4a6c8 DS |
566 | /* |
567 | * changes to the ipv6_mc_list require the socket lock and | |
568 | * a read lock on ip6_sk_mc_lock. We have the socket lock, | |
569 | * so reading the list is safe. | |
570 | */ | |
1da177e4 | 571 | |
456b61bc | 572 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
573 | if (pmc->ifindex != gsf->gf_interface) |
574 | continue; | |
575 | if (ipv6_addr_equal(group, &pmc->addr)) | |
576 | break; | |
577 | } | |
578 | if (!pmc) /* must have a prior join */ | |
579 | goto done; | |
580 | gsf->gf_fmode = pmc->sfmode; | |
581 | psl = pmc->sflist; | |
582 | count = psl ? psl->sl_count : 0; | |
583 | read_unlock_bh(&idev->lock); | |
96b52e61 | 584 | rcu_read_unlock(); |
1da177e4 LT |
585 | |
586 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; | |
587 | gsf->gf_numsrc = count; | |
588 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || | |
589 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { | |
590 | return -EFAULT; | |
591 | } | |
5ab4a6c8 DS |
592 | /* changes to psl require the socket lock, a read lock on |
593 | * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We | |
594 | * have the socket lock, so reading here is safe. | |
595 | */ | |
1da177e4 LT |
596 | for (i=0; i<copycount; i++) { |
597 | struct sockaddr_in6 *psin6; | |
598 | struct sockaddr_storage ss; | |
599 | ||
600 | psin6 = (struct sockaddr_in6 *)&ss; | |
601 | memset(&ss, 0, sizeof(ss)); | |
602 | psin6->sin6_family = AF_INET6; | |
603 | psin6->sin6_addr = psl->sl_addr[i]; | |
1ab1457c | 604 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) |
1da177e4 LT |
605 | return -EFAULT; |
606 | } | |
607 | return 0; | |
608 | done: | |
609 | read_unlock_bh(&idev->lock); | |
96b52e61 | 610 | rcu_read_unlock(); |
1da177e4 LT |
611 | return err; |
612 | } | |
613 | ||
9acd9f3a YH |
614 | int inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, |
615 | const struct in6_addr *src_addr) | |
1da177e4 LT |
616 | { |
617 | struct ipv6_pinfo *np = inet6_sk(sk); | |
618 | struct ipv6_mc_socklist *mc; | |
619 | struct ip6_sf_socklist *psl; | |
620 | int rv = 1; | |
621 | ||
456b61bc ED |
622 | rcu_read_lock(); |
623 | for_each_pmc_rcu(np, mc) { | |
1da177e4 LT |
624 | if (ipv6_addr_equal(&mc->addr, mc_addr)) |
625 | break; | |
626 | } | |
627 | if (!mc) { | |
456b61bc | 628 | rcu_read_unlock(); |
1da177e4 LT |
629 | return 1; |
630 | } | |
5ab4a6c8 | 631 | read_lock(&mc->sflock); |
1da177e4 LT |
632 | psl = mc->sflist; |
633 | if (!psl) { | |
634 | rv = mc->sfmode == MCAST_EXCLUDE; | |
635 | } else { | |
636 | int i; | |
637 | ||
638 | for (i=0; i<psl->sl_count; i++) { | |
639 | if (ipv6_addr_equal(&psl->sl_addr[i], src_addr)) | |
640 | break; | |
641 | } | |
642 | if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) | |
643 | rv = 0; | |
644 | if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) | |
645 | rv = 0; | |
646 | } | |
5ab4a6c8 | 647 | read_unlock(&mc->sflock); |
456b61bc | 648 | rcu_read_unlock(); |
1da177e4 LT |
649 | |
650 | return rv; | |
651 | } | |
652 | ||
653 | static void ma_put(struct ifmcaddr6 *mc) | |
654 | { | |
655 | if (atomic_dec_and_test(&mc->mca_refcnt)) { | |
656 | in6_dev_put(mc->idev); | |
657 | kfree(mc); | |
658 | } | |
659 | } | |
660 | ||
661 | static void igmp6_group_added(struct ifmcaddr6 *mc) | |
662 | { | |
663 | struct net_device *dev = mc->idev->dev; | |
664 | char buf[MAX_ADDR_LEN]; | |
665 | ||
666 | spin_lock_bh(&mc->mca_lock); | |
667 | if (!(mc->mca_flags&MAF_LOADED)) { | |
668 | mc->mca_flags |= MAF_LOADED; | |
669 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 670 | dev_mc_add(dev, buf); |
1da177e4 LT |
671 | } |
672 | spin_unlock_bh(&mc->mca_lock); | |
673 | ||
674 | if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT)) | |
675 | return; | |
676 | ||
677 | if (MLD_V1_SEEN(mc->idev)) { | |
678 | igmp6_join_group(mc); | |
679 | return; | |
680 | } | |
681 | /* else v2 */ | |
682 | ||
683 | mc->mca_crcount = mc->idev->mc_qrv; | |
684 | mld_ifc_event(mc->idev); | |
685 | } | |
686 | ||
687 | static void igmp6_group_dropped(struct ifmcaddr6 *mc) | |
688 | { | |
689 | struct net_device *dev = mc->idev->dev; | |
690 | char buf[MAX_ADDR_LEN]; | |
691 | ||
692 | spin_lock_bh(&mc->mca_lock); | |
693 | if (mc->mca_flags&MAF_LOADED) { | |
694 | mc->mca_flags &= ~MAF_LOADED; | |
695 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 696 | dev_mc_del(dev, buf); |
1da177e4 LT |
697 | } |
698 | ||
699 | if (mc->mca_flags & MAF_NOREPORT) | |
700 | goto done; | |
701 | spin_unlock_bh(&mc->mca_lock); | |
702 | ||
703 | if (!mc->idev->dead) | |
704 | igmp6_leave_group(mc); | |
705 | ||
706 | spin_lock_bh(&mc->mca_lock); | |
707 | if (del_timer(&mc->mca_timer)) | |
708 | atomic_dec(&mc->mca_refcnt); | |
709 | done: | |
710 | ip6_mc_clear_src(mc); | |
711 | spin_unlock_bh(&mc->mca_lock); | |
712 | } | |
713 | ||
714 | /* | |
715 | * deleted ifmcaddr6 manipulation | |
716 | */ | |
717 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) | |
718 | { | |
719 | struct ifmcaddr6 *pmc; | |
720 | ||
721 | /* this is an "ifmcaddr6" for convenience; only the fields below | |
722 | * are actually used. In particular, the refcnt and users are not | |
723 | * used for management of the delete list. Using the same structure | |
724 | * for deleted items allows change reports to use common code with | |
725 | * non-deleted or query-response MCA's. | |
726 | */ | |
0c600eda | 727 | pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC); |
1da177e4 LT |
728 | if (!pmc) |
729 | return; | |
0c600eda | 730 | |
1da177e4 LT |
731 | spin_lock_bh(&im->mca_lock); |
732 | spin_lock_init(&pmc->mca_lock); | |
733 | pmc->idev = im->idev; | |
734 | in6_dev_hold(idev); | |
735 | pmc->mca_addr = im->mca_addr; | |
736 | pmc->mca_crcount = idev->mc_qrv; | |
737 | pmc->mca_sfmode = im->mca_sfmode; | |
738 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
739 | struct ip6_sf_list *psf; | |
740 | ||
741 | pmc->mca_tomb = im->mca_tomb; | |
742 | pmc->mca_sources = im->mca_sources; | |
743 | im->mca_tomb = im->mca_sources = NULL; | |
744 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) | |
745 | psf->sf_crcount = pmc->mca_crcount; | |
746 | } | |
747 | spin_unlock_bh(&im->mca_lock); | |
748 | ||
6457d26b | 749 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
750 | pmc->next = idev->mc_tomb; |
751 | idev->mc_tomb = pmc; | |
6457d26b | 752 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
753 | } |
754 | ||
755 | static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca) | |
756 | { | |
757 | struct ifmcaddr6 *pmc, *pmc_prev; | |
758 | struct ip6_sf_list *psf, *psf_next; | |
759 | ||
6457d26b | 760 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
761 | pmc_prev = NULL; |
762 | for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) { | |
763 | if (ipv6_addr_equal(&pmc->mca_addr, pmca)) | |
764 | break; | |
765 | pmc_prev = pmc; | |
766 | } | |
767 | if (pmc) { | |
768 | if (pmc_prev) | |
769 | pmc_prev->next = pmc->next; | |
770 | else | |
771 | idev->mc_tomb = pmc->next; | |
772 | } | |
6457d26b SH |
773 | spin_unlock_bh(&idev->mc_lock); |
774 | ||
1da177e4 LT |
775 | if (pmc) { |
776 | for (psf=pmc->mca_tomb; psf; psf=psf_next) { | |
777 | psf_next = psf->sf_next; | |
778 | kfree(psf); | |
779 | } | |
780 | in6_dev_put(pmc->idev); | |
781 | kfree(pmc); | |
782 | } | |
783 | } | |
784 | ||
785 | static void mld_clear_delrec(struct inet6_dev *idev) | |
786 | { | |
787 | struct ifmcaddr6 *pmc, *nextpmc; | |
788 | ||
6457d26b | 789 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
790 | pmc = idev->mc_tomb; |
791 | idev->mc_tomb = NULL; | |
6457d26b | 792 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
793 | |
794 | for (; pmc; pmc = nextpmc) { | |
795 | nextpmc = pmc->next; | |
796 | ip6_mc_clear_src(pmc); | |
797 | in6_dev_put(pmc->idev); | |
798 | kfree(pmc); | |
799 | } | |
800 | ||
801 | /* clear dead sources, too */ | |
802 | read_lock_bh(&idev->lock); | |
803 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
804 | struct ip6_sf_list *psf, *psf_next; | |
805 | ||
806 | spin_lock_bh(&pmc->mca_lock); | |
807 | psf = pmc->mca_tomb; | |
808 | pmc->mca_tomb = NULL; | |
809 | spin_unlock_bh(&pmc->mca_lock); | |
810 | for (; psf; psf=psf_next) { | |
811 | psf_next = psf->sf_next; | |
812 | kfree(psf); | |
813 | } | |
814 | } | |
815 | read_unlock_bh(&idev->lock); | |
816 | } | |
817 | ||
818 | ||
819 | /* | |
820 | * device multicast group inc (add if not found) | |
821 | */ | |
9acd9f3a | 822 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
823 | { |
824 | struct ifmcaddr6 *mc; | |
825 | struct inet6_dev *idev; | |
826 | ||
96b52e61 | 827 | /* we need to take a reference on idev */ |
1da177e4 LT |
828 | idev = in6_dev_get(dev); |
829 | ||
830 | if (idev == NULL) | |
831 | return -EINVAL; | |
832 | ||
833 | write_lock_bh(&idev->lock); | |
834 | if (idev->dead) { | |
835 | write_unlock_bh(&idev->lock); | |
836 | in6_dev_put(idev); | |
837 | return -ENODEV; | |
838 | } | |
839 | ||
840 | for (mc = idev->mc_list; mc; mc = mc->next) { | |
841 | if (ipv6_addr_equal(&mc->mca_addr, addr)) { | |
842 | mc->mca_users++; | |
843 | write_unlock_bh(&idev->lock); | |
844 | ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0, | |
845 | NULL, 0); | |
846 | in6_dev_put(idev); | |
847 | return 0; | |
848 | } | |
849 | } | |
850 | ||
851 | /* | |
852 | * not found: create a new one. | |
853 | */ | |
854 | ||
0c600eda | 855 | mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC); |
1da177e4 LT |
856 | |
857 | if (mc == NULL) { | |
858 | write_unlock_bh(&idev->lock); | |
859 | in6_dev_put(idev); | |
860 | return -ENOMEM; | |
861 | } | |
862 | ||
b24b8a24 | 863 | setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc); |
1da177e4 LT |
864 | |
865 | ipv6_addr_copy(&mc->mca_addr, addr); | |
96b52e61 | 866 | mc->idev = idev; /* (reference taken) */ |
1da177e4 LT |
867 | mc->mca_users = 1; |
868 | /* mca_stamp should be updated upon changes */ | |
869 | mc->mca_cstamp = mc->mca_tstamp = jiffies; | |
870 | atomic_set(&mc->mca_refcnt, 2); | |
871 | spin_lock_init(&mc->mca_lock); | |
872 | ||
873 | /* initial mode is (EX, empty) */ | |
874 | mc->mca_sfmode = MCAST_EXCLUDE; | |
875 | mc->mca_sfcount[MCAST_EXCLUDE] = 1; | |
876 | ||
877 | if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) || | |
878 | IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
879 | mc->mca_flags |= MAF_NOREPORT; | |
880 | ||
881 | mc->next = idev->mc_list; | |
882 | idev->mc_list = mc; | |
883 | write_unlock_bh(&idev->lock); | |
884 | ||
885 | mld_del_delrec(idev, &mc->mca_addr); | |
886 | igmp6_group_added(mc); | |
887 | ma_put(mc); | |
888 | return 0; | |
889 | } | |
890 | ||
891 | /* | |
892 | * device multicast group del | |
893 | */ | |
9acd9f3a | 894 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
895 | { |
896 | struct ifmcaddr6 *ma, **map; | |
897 | ||
898 | write_lock_bh(&idev->lock); | |
899 | for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) { | |
900 | if (ipv6_addr_equal(&ma->mca_addr, addr)) { | |
901 | if (--ma->mca_users == 0) { | |
902 | *map = ma->next; | |
903 | write_unlock_bh(&idev->lock); | |
904 | ||
905 | igmp6_group_dropped(ma); | |
906 | ||
907 | ma_put(ma); | |
908 | return 0; | |
909 | } | |
910 | write_unlock_bh(&idev->lock); | |
911 | return 0; | |
912 | } | |
913 | } | |
914 | write_unlock_bh(&idev->lock); | |
915 | ||
916 | return -ENOENT; | |
917 | } | |
918 | ||
9acd9f3a | 919 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 | 920 | { |
96b52e61 | 921 | struct inet6_dev *idev; |
1da177e4 LT |
922 | int err; |
923 | ||
96b52e61 | 924 | rcu_read_lock(); |
1da177e4 | 925 | |
96b52e61 ED |
926 | idev = __in6_dev_get(dev); |
927 | if (!idev) | |
928 | err = -ENODEV; | |
929 | else | |
930 | err = __ipv6_dev_mc_dec(idev, addr); | |
1da177e4 | 931 | |
96b52e61 | 932 | rcu_read_unlock(); |
1da177e4 LT |
933 | return err; |
934 | } | |
935 | ||
936 | /* | |
937 | * identify MLD packets for MLD filter exceptions | |
938 | */ | |
939 | int ipv6_is_mld(struct sk_buff *skb, int nexthdr) | |
940 | { | |
941 | struct icmp6hdr *pic; | |
942 | ||
943 | if (nexthdr != IPPROTO_ICMPV6) | |
944 | return 0; | |
945 | ||
946 | if (!pskb_may_pull(skb, sizeof(struct icmp6hdr))) | |
947 | return 0; | |
948 | ||
cc70ab26 | 949 | pic = icmp6_hdr(skb); |
1da177e4 LT |
950 | |
951 | switch (pic->icmp6_type) { | |
952 | case ICMPV6_MGM_QUERY: | |
953 | case ICMPV6_MGM_REPORT: | |
954 | case ICMPV6_MGM_REDUCTION: | |
955 | case ICMPV6_MLD2_REPORT: | |
956 | return 1; | |
957 | default: | |
958 | break; | |
959 | } | |
960 | return 0; | |
961 | } | |
962 | ||
963 | /* | |
964 | * check if the interface/address pair is valid | |
965 | */ | |
9acd9f3a YH |
966 | int ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, |
967 | const struct in6_addr *src_addr) | |
1da177e4 LT |
968 | { |
969 | struct inet6_dev *idev; | |
970 | struct ifmcaddr6 *mc; | |
971 | int rv = 0; | |
972 | ||
96b52e61 ED |
973 | rcu_read_lock(); |
974 | idev = __in6_dev_get(dev); | |
1da177e4 LT |
975 | if (idev) { |
976 | read_lock_bh(&idev->lock); | |
977 | for (mc = idev->mc_list; mc; mc=mc->next) { | |
978 | if (ipv6_addr_equal(&mc->mca_addr, group)) | |
979 | break; | |
980 | } | |
981 | if (mc) { | |
982 | if (src_addr && !ipv6_addr_any(src_addr)) { | |
983 | struct ip6_sf_list *psf; | |
984 | ||
985 | spin_lock_bh(&mc->mca_lock); | |
986 | for (psf=mc->mca_sources;psf;psf=psf->sf_next) { | |
987 | if (ipv6_addr_equal(&psf->sf_addr, src_addr)) | |
988 | break; | |
989 | } | |
990 | if (psf) | |
991 | rv = psf->sf_count[MCAST_INCLUDE] || | |
992 | psf->sf_count[MCAST_EXCLUDE] != | |
993 | mc->mca_sfcount[MCAST_EXCLUDE]; | |
994 | else | |
995 | rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0; | |
996 | spin_unlock_bh(&mc->mca_lock); | |
997 | } else | |
998 | rv = 1; /* don't filter unspecified source */ | |
999 | } | |
1000 | read_unlock_bh(&idev->lock); | |
1da177e4 | 1001 | } |
96b52e61 | 1002 | rcu_read_unlock(); |
1da177e4 LT |
1003 | return rv; |
1004 | } | |
1005 | ||
1006 | static void mld_gq_start_timer(struct inet6_dev *idev) | |
1007 | { | |
1008 | int tv = net_random() % idev->mc_maxdelay; | |
1009 | ||
1010 | idev->mc_gq_running = 1; | |
1011 | if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2)) | |
1012 | in6_dev_hold(idev); | |
1013 | } | |
1014 | ||
1015 | static void mld_ifc_start_timer(struct inet6_dev *idev, int delay) | |
1016 | { | |
1017 | int tv = net_random() % delay; | |
1018 | ||
1019 | if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2)) | |
1020 | in6_dev_hold(idev); | |
1021 | } | |
1022 | ||
1023 | /* | |
1024 | * IGMP handling (alias multicast ICMPv6 messages) | |
1025 | */ | |
1026 | ||
1027 | static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) | |
1028 | { | |
1029 | unsigned long delay = resptime; | |
1030 | ||
1031 | /* Do not start timer for these addresses */ | |
1032 | if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) || | |
1033 | IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
1034 | return; | |
1035 | ||
1036 | if (del_timer(&ma->mca_timer)) { | |
1037 | atomic_dec(&ma->mca_refcnt); | |
1038 | delay = ma->mca_timer.expires - jiffies; | |
1039 | } | |
1040 | ||
1041 | if (delay >= resptime) { | |
1042 | if (resptime) | |
1043 | delay = net_random() % resptime; | |
1044 | else | |
1045 | delay = 1; | |
1046 | } | |
1047 | ma->mca_timer.expires = jiffies + delay; | |
1048 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
1049 | atomic_inc(&ma->mca_refcnt); | |
1050 | ma->mca_flags |= MAF_TIMER_RUNNING; | |
1051 | } | |
1052 | ||
5ab4a6c8 DS |
1053 | /* mark EXCLUDE-mode sources */ |
1054 | static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs, | |
1da177e4 LT |
1055 | struct in6_addr *srcs) |
1056 | { | |
1057 | struct ip6_sf_list *psf; | |
1058 | int i, scount; | |
1059 | ||
1060 | scount = 0; | |
1061 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1062 | if (scount == nsrcs) | |
1063 | break; | |
5ab4a6c8 DS |
1064 | for (i=0; i<nsrcs; i++) { |
1065 | /* skip inactive filters */ | |
1066 | if (pmc->mca_sfcount[MCAST_INCLUDE] || | |
1067 | pmc->mca_sfcount[MCAST_EXCLUDE] != | |
1068 | psf->sf_count[MCAST_EXCLUDE]) | |
1069 | continue; | |
1070 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { | |
1071 | scount++; | |
1072 | break; | |
1073 | } | |
1074 | } | |
1075 | } | |
1076 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1077 | if (scount == nsrcs) /* all sources excluded */ | |
1078 | return 0; | |
1079 | return 1; | |
1080 | } | |
1081 | ||
1082 | static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs, | |
1083 | struct in6_addr *srcs) | |
1084 | { | |
1085 | struct ip6_sf_list *psf; | |
1086 | int i, scount; | |
1087 | ||
1088 | if (pmc->mca_sfmode == MCAST_EXCLUDE) | |
1089 | return mld_xmarksources(pmc, nsrcs, srcs); | |
1090 | ||
1091 | /* mark INCLUDE-mode sources */ | |
1092 | ||
1093 | scount = 0; | |
1094 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1095 | if (scount == nsrcs) | |
1096 | break; | |
1097 | for (i=0; i<nsrcs; i++) { | |
1da177e4 LT |
1098 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1099 | psf->sf_gsresp = 1; | |
1100 | scount++; | |
1101 | break; | |
1102 | } | |
5ab4a6c8 DS |
1103 | } |
1104 | } | |
1105 | if (!scount) { | |
1106 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1107 | return 0; | |
1da177e4 | 1108 | } |
5ab4a6c8 DS |
1109 | pmc->mca_flags |= MAF_GSQUERY; |
1110 | return 1; | |
1da177e4 LT |
1111 | } |
1112 | ||
96b52e61 | 1113 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1114 | int igmp6_event_query(struct sk_buff *skb) |
1115 | { | |
97300b5f | 1116 | struct mld2_query *mlh2 = NULL; |
1da177e4 LT |
1117 | struct ifmcaddr6 *ma; |
1118 | struct in6_addr *group; | |
1119 | unsigned long max_delay; | |
1120 | struct inet6_dev *idev; | |
6e7cb837 | 1121 | struct mld_msg *mld; |
1da177e4 LT |
1122 | int group_type; |
1123 | int mark = 0; | |
1124 | int len; | |
1125 | ||
1126 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) | |
1127 | return -EINVAL; | |
1128 | ||
1129 | /* compute payload length excluding extension headers */ | |
0660e03f | 1130 | len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); |
cfe1fc77 | 1131 | len -= skb_network_header_len(skb); |
1da177e4 LT |
1132 | |
1133 | /* Drop queries with not link local source */ | |
0660e03f | 1134 | if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) |
1da177e4 LT |
1135 | return -EINVAL; |
1136 | ||
96b52e61 | 1137 | idev = __in6_dev_get(skb->dev); |
1da177e4 LT |
1138 | |
1139 | if (idev == NULL) | |
1140 | return 0; | |
1141 | ||
6e7cb837 YH |
1142 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1143 | group = &mld->mld_mca; | |
1da177e4 LT |
1144 | group_type = ipv6_addr_type(group); |
1145 | ||
1146 | if (group_type != IPV6_ADDR_ANY && | |
96b52e61 | 1147 | !(group_type&IPV6_ADDR_MULTICAST)) |
1da177e4 | 1148 | return -EINVAL; |
1da177e4 LT |
1149 | |
1150 | if (len == 24) { | |
1151 | int switchback; | |
1152 | /* MLDv1 router present */ | |
1153 | ||
1154 | /* Translate milliseconds to jiffies */ | |
6e7cb837 | 1155 | max_delay = (ntohs(mld->mld_maxdelay)*HZ)/1000; |
1da177e4 LT |
1156 | |
1157 | switchback = (idev->mc_qrv + 1) * max_delay; | |
1158 | idev->mc_v1_seen = jiffies + switchback; | |
1159 | ||
1160 | /* cancel the interface change timer */ | |
1161 | idev->mc_ifc_count = 0; | |
1162 | if (del_timer(&idev->mc_ifc_timer)) | |
1163 | __in6_dev_put(idev); | |
1164 | /* clear deleted report items */ | |
1165 | mld_clear_delrec(idev); | |
1166 | } else if (len >= 28) { | |
1ab1457c | 1167 | int srcs_offset = sizeof(struct mld2_query) - |
97300b5f | 1168 | sizeof(struct icmp6hdr); |
96b52e61 | 1169 | if (!pskb_may_pull(skb, srcs_offset)) |
97300b5f | 1170 | return -EINVAL; |
96b52e61 | 1171 | |
9c70220b | 1172 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
6e7cb837 | 1173 | max_delay = (MLDV2_MRC(ntohs(mlh2->mld2q_mrc))*HZ)/1000; |
1da177e4 LT |
1174 | if (!max_delay) |
1175 | max_delay = 1; | |
1176 | idev->mc_maxdelay = max_delay; | |
6e7cb837 YH |
1177 | if (mlh2->mld2q_qrv) |
1178 | idev->mc_qrv = mlh2->mld2q_qrv; | |
1da177e4 | 1179 | if (group_type == IPV6_ADDR_ANY) { /* general query */ |
96b52e61 | 1180 | if (mlh2->mld2q_nsrcs) |
1da177e4 | 1181 | return -EINVAL; /* no sources allowed */ |
96b52e61 | 1182 | |
1da177e4 | 1183 | mld_gq_start_timer(idev); |
1da177e4 LT |
1184 | return 0; |
1185 | } | |
1186 | /* mark sources to include, if group & source-specific */ | |
6e7cb837 | 1187 | if (mlh2->mld2q_nsrcs != 0) { |
1ab1457c | 1188 | if (!pskb_may_pull(skb, srcs_offset + |
96b52e61 | 1189 | ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr))) |
97300b5f | 1190 | return -EINVAL; |
96b52e61 | 1191 | |
9c70220b | 1192 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
97300b5f YZ |
1193 | mark = 1; |
1194 | } | |
96b52e61 | 1195 | } else |
1da177e4 | 1196 | return -EINVAL; |
1da177e4 LT |
1197 | |
1198 | read_lock_bh(&idev->lock); | |
1199 | if (group_type == IPV6_ADDR_ANY) { | |
1200 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
1201 | spin_lock_bh(&ma->mca_lock); | |
1202 | igmp6_group_queried(ma, max_delay); | |
1203 | spin_unlock_bh(&ma->mca_lock); | |
1204 | } | |
1205 | } else { | |
1206 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
7add2a43 | 1207 | if (!ipv6_addr_equal(group, &ma->mca_addr)) |
1da177e4 LT |
1208 | continue; |
1209 | spin_lock_bh(&ma->mca_lock); | |
1210 | if (ma->mca_flags & MAF_TIMER_RUNNING) { | |
1211 | /* gsquery <- gsquery && mark */ | |
1212 | if (!mark) | |
1213 | ma->mca_flags &= ~MAF_GSQUERY; | |
1214 | } else { | |
1215 | /* gsquery <- mark */ | |
1216 | if (mark) | |
1217 | ma->mca_flags |= MAF_GSQUERY; | |
1218 | else | |
1219 | ma->mca_flags &= ~MAF_GSQUERY; | |
1220 | } | |
5ab4a6c8 | 1221 | if (!(ma->mca_flags & MAF_GSQUERY) || |
6e7cb837 | 1222 | mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs)) |
5ab4a6c8 | 1223 | igmp6_group_queried(ma, max_delay); |
1da177e4 | 1224 | spin_unlock_bh(&ma->mca_lock); |
7add2a43 | 1225 | break; |
1da177e4 LT |
1226 | } |
1227 | } | |
1228 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1229 | |
1230 | return 0; | |
1231 | } | |
1232 | ||
96b52e61 | 1233 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1234 | int igmp6_event_report(struct sk_buff *skb) |
1235 | { | |
1236 | struct ifmcaddr6 *ma; | |
1da177e4 | 1237 | struct inet6_dev *idev; |
6e7cb837 | 1238 | struct mld_msg *mld; |
1da177e4 LT |
1239 | int addr_type; |
1240 | ||
1241 | /* Our own report looped back. Ignore it. */ | |
1242 | if (skb->pkt_type == PACKET_LOOPBACK) | |
1243 | return 0; | |
1244 | ||
24c69275 DS |
1245 | /* send our report if the MC router may not have heard this report */ |
1246 | if (skb->pkt_type != PACKET_MULTICAST && | |
1247 | skb->pkt_type != PACKET_BROADCAST) | |
1248 | return 0; | |
1249 | ||
6e7cb837 | 1250 | if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr))) |
1da177e4 LT |
1251 | return -EINVAL; |
1252 | ||
6e7cb837 | 1253 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1da177e4 LT |
1254 | |
1255 | /* Drop reports with not link local source */ | |
0660e03f | 1256 | addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr); |
1ab1457c | 1257 | if (addr_type != IPV6_ADDR_ANY && |
1da177e4 LT |
1258 | !(addr_type&IPV6_ADDR_LINKLOCAL)) |
1259 | return -EINVAL; | |
1260 | ||
96b52e61 | 1261 | idev = __in6_dev_get(skb->dev); |
1da177e4 LT |
1262 | if (idev == NULL) |
1263 | return -ENODEV; | |
1264 | ||
1265 | /* | |
1266 | * Cancel the timer for this group | |
1267 | */ | |
1268 | ||
1269 | read_lock_bh(&idev->lock); | |
1270 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
6e7cb837 | 1271 | if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) { |
1da177e4 LT |
1272 | spin_lock(&ma->mca_lock); |
1273 | if (del_timer(&ma->mca_timer)) | |
1274 | atomic_dec(&ma->mca_refcnt); | |
1275 | ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING); | |
1276 | spin_unlock(&ma->mca_lock); | |
1277 | break; | |
1278 | } | |
1279 | } | |
1280 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1281 | return 0; |
1282 | } | |
1283 | ||
1284 | static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type, | |
1285 | int gdeleted, int sdeleted) | |
1286 | { | |
1287 | switch (type) { | |
1288 | case MLD2_MODE_IS_INCLUDE: | |
1289 | case MLD2_MODE_IS_EXCLUDE: | |
1290 | if (gdeleted || sdeleted) | |
1291 | return 0; | |
5ab4a6c8 DS |
1292 | if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) { |
1293 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1294 | return 1; | |
1295 | /* don't include if this source is excluded | |
1296 | * in all filters | |
1297 | */ | |
1298 | if (psf->sf_count[MCAST_INCLUDE]) | |
7add2a43 | 1299 | return type == MLD2_MODE_IS_INCLUDE; |
5ab4a6c8 DS |
1300 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1301 | psf->sf_count[MCAST_EXCLUDE]; | |
1302 | } | |
1303 | return 0; | |
1da177e4 LT |
1304 | case MLD2_CHANGE_TO_INCLUDE: |
1305 | if (gdeleted || sdeleted) | |
1306 | return 0; | |
1307 | return psf->sf_count[MCAST_INCLUDE] != 0; | |
1308 | case MLD2_CHANGE_TO_EXCLUDE: | |
1309 | if (gdeleted || sdeleted) | |
1310 | return 0; | |
1311 | if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 || | |
1312 | psf->sf_count[MCAST_INCLUDE]) | |
1313 | return 0; | |
1314 | return pmc->mca_sfcount[MCAST_EXCLUDE] == | |
1315 | psf->sf_count[MCAST_EXCLUDE]; | |
1316 | case MLD2_ALLOW_NEW_SOURCES: | |
1317 | if (gdeleted || !psf->sf_crcount) | |
1318 | return 0; | |
1319 | return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted; | |
1320 | case MLD2_BLOCK_OLD_SOURCES: | |
1321 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1322 | return gdeleted || (psf->sf_crcount && sdeleted); | |
1323 | return psf->sf_crcount && !gdeleted && !sdeleted; | |
1324 | } | |
1325 | return 0; | |
1326 | } | |
1327 | ||
1328 | static int | |
1329 | mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted) | |
1330 | { | |
1331 | struct ip6_sf_list *psf; | |
1332 | int scount = 0; | |
1333 | ||
1334 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1335 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) | |
1336 | continue; | |
1337 | scount++; | |
1338 | } | |
1339 | return scount; | |
1340 | } | |
1341 | ||
1342 | static struct sk_buff *mld_newpack(struct net_device *dev, int size) | |
1343 | { | |
c346dca1 | 1344 | struct net *net = dev_net(dev); |
b8ad0cbc | 1345 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 LT |
1346 | struct sk_buff *skb; |
1347 | struct mld2_report *pmr; | |
1348 | struct in6_addr addr_buf; | |
d7aabf22 | 1349 | const struct in6_addr *saddr; |
1da177e4 LT |
1350 | int err; |
1351 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1352 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1353 | IPV6_TLV_PADN, 0 }; | |
1354 | ||
1355 | /* we assume size > sizeof(ra) here */ | |
72e09ad1 ED |
1356 | size += LL_ALLOCATED_SPACE(dev); |
1357 | /* limit our allocations to order-0 page */ | |
1358 | size = min_t(int, size, SKB_MAX_ORDER(0, 0)); | |
1359 | skb = sock_alloc_send_skb(sk, size, 1, &err); | |
1da177e4 | 1360 | |
cfcabdcc | 1361 | if (!skb) |
1da177e4 LT |
1362 | return NULL; |
1363 | ||
1364 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
1da177e4 | 1365 | |
95c385b4 | 1366 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1367 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1368 | * use unspecified address as the source address |
1da177e4 LT |
1369 | * when a valid link-local address is not available. |
1370 | */ | |
d7aabf22 YH |
1371 | saddr = &in6addr_any; |
1372 | } else | |
1373 | saddr = &addr_buf; | |
1da177e4 | 1374 | |
d7aabf22 | 1375 | ip6_nd_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0); |
1da177e4 LT |
1376 | |
1377 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1378 | ||
27a884dc | 1379 | skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data); |
d10ba34b ACM |
1380 | skb_put(skb, sizeof(*pmr)); |
1381 | pmr = (struct mld2_report *)skb_transport_header(skb); | |
6e7cb837 YH |
1382 | pmr->mld2r_type = ICMPV6_MLD2_REPORT; |
1383 | pmr->mld2r_resv1 = 0; | |
1384 | pmr->mld2r_cksum = 0; | |
1385 | pmr->mld2r_resv2 = 0; | |
1386 | pmr->mld2r_ngrec = 0; | |
1da177e4 LT |
1387 | return skb; |
1388 | } | |
1389 | ||
1390 | static void mld_sendpack(struct sk_buff *skb) | |
1391 | { | |
0660e03f | 1392 | struct ipv6hdr *pip6 = ipv6_hdr(skb); |
9c70220b ACM |
1393 | struct mld2_report *pmr = |
1394 | (struct mld2_report *)skb_transport_header(skb); | |
1da177e4 | 1395 | int payload_len, mldlen; |
96b52e61 | 1396 | struct inet6_dev *idev; |
c346dca1 | 1397 | struct net *net = dev_net(skb->dev); |
1da177e4 | 1398 | int err; |
4c9483b2 | 1399 | struct flowi6 fl6; |
adf30907 | 1400 | struct dst_entry *dst; |
1da177e4 | 1401 | |
96b52e61 ED |
1402 | rcu_read_lock(); |
1403 | idev = __in6_dev_get(skb->dev); | |
edf391ff NH |
1404 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len); |
1405 | ||
27a884dc ACM |
1406 | payload_len = (skb->tail - skb->network_header) - sizeof(*pip6); |
1407 | mldlen = skb->tail - skb->transport_header; | |
1da177e4 LT |
1408 | pip6->payload_len = htons(payload_len); |
1409 | ||
6e7cb837 YH |
1410 | pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen, |
1411 | IPPROTO_ICMPV6, | |
1412 | csum_partial(skb_transport_header(skb), | |
1413 | mldlen, 0)); | |
41927178 | 1414 | |
adf30907 | 1415 | dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr); |
41927178 | 1416 | |
adf30907 | 1417 | if (!dst) { |
41927178 YH |
1418 | err = -ENOMEM; |
1419 | goto err_out; | |
1420 | } | |
1421 | ||
4c9483b2 | 1422 | icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT, |
41927178 YH |
1423 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1424 | skb->dev->ifindex); | |
1425 | ||
4c9483b2 | 1426 | dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), NULL, 0); |
452edd59 DM |
1427 | err = 0; |
1428 | if (IS_ERR(dst)) { | |
1429 | err = PTR_ERR(dst); | |
1430 | dst = NULL; | |
1431 | } | |
adf30907 | 1432 | skb_dst_set(skb, dst); |
41927178 YH |
1433 | if (err) |
1434 | goto err_out; | |
1435 | ||
edf391ff NH |
1436 | payload_len = skb->len; |
1437 | ||
b2e0b385 | 1438 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
41927178 YH |
1439 | dst_output); |
1440 | out: | |
1da177e4 | 1441 | if (!err) { |
5a57d4c7 | 1442 | ICMP6MSGOUT_INC_STATS_BH(net, idev, ICMPV6_MLD2_REPORT); |
e41b5368 | 1443 | ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS); |
edf391ff | 1444 | IP6_UPD_PO_STATS_BH(net, idev, IPSTATS_MIB_OUTMCAST, payload_len); |
1da177e4 | 1445 | } else |
483a47d2 | 1446 | IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 | 1447 | |
96b52e61 | 1448 | rcu_read_unlock(); |
41927178 YH |
1449 | return; |
1450 | ||
1451 | err_out: | |
1452 | kfree_skb(skb); | |
1453 | goto out; | |
1da177e4 LT |
1454 | } |
1455 | ||
1456 | static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel) | |
1457 | { | |
fab10fe3 | 1458 | return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel); |
1da177e4 LT |
1459 | } |
1460 | ||
1461 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1462 | int type, struct mld2_grec **ppgr) | |
1463 | { | |
1464 | struct net_device *dev = pmc->idev->dev; | |
1465 | struct mld2_report *pmr; | |
1466 | struct mld2_grec *pgr; | |
1467 | ||
1468 | if (!skb) | |
1469 | skb = mld_newpack(dev, dev->mtu); | |
1470 | if (!skb) | |
1471 | return NULL; | |
1472 | pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec)); | |
1473 | pgr->grec_type = type; | |
1474 | pgr->grec_auxwords = 0; | |
1475 | pgr->grec_nsrcs = 0; | |
1476 | pgr->grec_mca = pmc->mca_addr; /* structure copy */ | |
9c70220b | 1477 | pmr = (struct mld2_report *)skb_transport_header(skb); |
6e7cb837 | 1478 | pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1); |
1da177e4 LT |
1479 | *ppgr = pgr; |
1480 | return skb; | |
1481 | } | |
1482 | ||
1483 | #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \ | |
1484 | skb_tailroom(skb)) : 0) | |
1485 | ||
1486 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1487 | int type, int gdeleted, int sdeleted) | |
1488 | { | |
1489 | struct net_device *dev = pmc->idev->dev; | |
1490 | struct mld2_report *pmr; | |
1491 | struct mld2_grec *pgr = NULL; | |
1492 | struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list; | |
5ab4a6c8 | 1493 | int scount, stotal, first, isquery, truncate; |
1da177e4 LT |
1494 | |
1495 | if (pmc->mca_flags & MAF_NOREPORT) | |
1496 | return skb; | |
1497 | ||
1498 | isquery = type == MLD2_MODE_IS_INCLUDE || | |
1499 | type == MLD2_MODE_IS_EXCLUDE; | |
1500 | truncate = type == MLD2_MODE_IS_EXCLUDE || | |
1501 | type == MLD2_CHANGE_TO_EXCLUDE; | |
1502 | ||
5ab4a6c8 DS |
1503 | stotal = scount = 0; |
1504 | ||
1da177e4 LT |
1505 | psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources; |
1506 | ||
5ab4a6c8 DS |
1507 | if (!*psf_list) |
1508 | goto empty_source; | |
1509 | ||
9c70220b | 1510 | pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL; |
1da177e4 LT |
1511 | |
1512 | /* EX and TO_EX get a fresh packet, if needed */ | |
1513 | if (truncate) { | |
6e7cb837 | 1514 | if (pmr && pmr->mld2r_ngrec && |
1da177e4 LT |
1515 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { |
1516 | if (skb) | |
1517 | mld_sendpack(skb); | |
1518 | skb = mld_newpack(dev, dev->mtu); | |
1519 | } | |
1520 | } | |
1521 | first = 1; | |
1da177e4 LT |
1522 | psf_prev = NULL; |
1523 | for (psf=*psf_list; psf; psf=psf_next) { | |
1524 | struct in6_addr *psrc; | |
1525 | ||
1526 | psf_next = psf->sf_next; | |
1527 | ||
1528 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) { | |
1529 | psf_prev = psf; | |
1530 | continue; | |
1531 | } | |
1532 | ||
1533 | /* clear marks on query responses */ | |
1534 | if (isquery) | |
1535 | psf->sf_gsresp = 0; | |
1536 | ||
1537 | if (AVAILABLE(skb) < sizeof(*psrc) + | |
1538 | first*sizeof(struct mld2_grec)) { | |
1539 | if (truncate && !first) | |
1540 | break; /* truncate these */ | |
1541 | if (pgr) | |
1542 | pgr->grec_nsrcs = htons(scount); | |
1543 | if (skb) | |
1544 | mld_sendpack(skb); | |
1545 | skb = mld_newpack(dev, dev->mtu); | |
1546 | first = 1; | |
1547 | scount = 0; | |
1548 | } | |
1549 | if (first) { | |
1550 | skb = add_grhead(skb, pmc, type, &pgr); | |
1551 | first = 0; | |
1552 | } | |
cc63f70b AD |
1553 | if (!skb) |
1554 | return NULL; | |
1da177e4 LT |
1555 | psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc)); |
1556 | *psrc = psf->sf_addr; | |
5ab4a6c8 | 1557 | scount++; stotal++; |
1da177e4 LT |
1558 | if ((type == MLD2_ALLOW_NEW_SOURCES || |
1559 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) { | |
1560 | psf->sf_crcount--; | |
1561 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { | |
1562 | if (psf_prev) | |
1563 | psf_prev->sf_next = psf->sf_next; | |
1564 | else | |
1565 | *psf_list = psf->sf_next; | |
1566 | kfree(psf); | |
1567 | continue; | |
1568 | } | |
1569 | } | |
1570 | psf_prev = psf; | |
1571 | } | |
5ab4a6c8 DS |
1572 | |
1573 | empty_source: | |
1574 | if (!stotal) { | |
1575 | if (type == MLD2_ALLOW_NEW_SOURCES || | |
1576 | type == MLD2_BLOCK_OLD_SOURCES) | |
1577 | return skb; | |
1578 | if (pmc->mca_crcount || isquery) { | |
1579 | /* make sure we have room for group header */ | |
1580 | if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) { | |
1581 | mld_sendpack(skb); | |
1582 | skb = NULL; /* add_grhead will get a new one */ | |
1583 | } | |
1584 | skb = add_grhead(skb, pmc, type, &pgr); | |
1585 | } | |
1586 | } | |
1da177e4 LT |
1587 | if (pgr) |
1588 | pgr->grec_nsrcs = htons(scount); | |
1589 | ||
1590 | if (isquery) | |
1591 | pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */ | |
1592 | return skb; | |
1593 | } | |
1594 | ||
1595 | static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc) | |
1596 | { | |
1597 | struct sk_buff *skb = NULL; | |
1598 | int type; | |
1599 | ||
1600 | if (!pmc) { | |
1601 | read_lock_bh(&idev->lock); | |
1602 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1603 | if (pmc->mca_flags & MAF_NOREPORT) | |
1604 | continue; | |
1605 | spin_lock_bh(&pmc->mca_lock); | |
1606 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1607 | type = MLD2_MODE_IS_EXCLUDE; | |
1608 | else | |
1609 | type = MLD2_MODE_IS_INCLUDE; | |
1610 | skb = add_grec(skb, pmc, type, 0, 0); | |
1611 | spin_unlock_bh(&pmc->mca_lock); | |
1612 | } | |
1613 | read_unlock_bh(&idev->lock); | |
1614 | } else { | |
1615 | spin_lock_bh(&pmc->mca_lock); | |
1616 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1617 | type = MLD2_MODE_IS_EXCLUDE; | |
1618 | else | |
1619 | type = MLD2_MODE_IS_INCLUDE; | |
1620 | skb = add_grec(skb, pmc, type, 0, 0); | |
1621 | spin_unlock_bh(&pmc->mca_lock); | |
1622 | } | |
1623 | if (skb) | |
1624 | mld_sendpack(skb); | |
1625 | } | |
1626 | ||
1627 | /* | |
1628 | * remove zero-count source records from a source filter list | |
1629 | */ | |
1630 | static void mld_clear_zeros(struct ip6_sf_list **ppsf) | |
1631 | { | |
1632 | struct ip6_sf_list *psf_prev, *psf_next, *psf; | |
1633 | ||
1634 | psf_prev = NULL; | |
1635 | for (psf=*ppsf; psf; psf = psf_next) { | |
1636 | psf_next = psf->sf_next; | |
1637 | if (psf->sf_crcount == 0) { | |
1638 | if (psf_prev) | |
1639 | psf_prev->sf_next = psf->sf_next; | |
1640 | else | |
1641 | *ppsf = psf->sf_next; | |
1642 | kfree(psf); | |
1643 | } else | |
1644 | psf_prev = psf; | |
1645 | } | |
1646 | } | |
1647 | ||
1648 | static void mld_send_cr(struct inet6_dev *idev) | |
1649 | { | |
1650 | struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next; | |
1651 | struct sk_buff *skb = NULL; | |
1652 | int type, dtype; | |
1653 | ||
1654 | read_lock_bh(&idev->lock); | |
6457d26b | 1655 | spin_lock(&idev->mc_lock); |
1da177e4 LT |
1656 | |
1657 | /* deleted MCA's */ | |
1658 | pmc_prev = NULL; | |
1659 | for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) { | |
1660 | pmc_next = pmc->next; | |
1661 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
1662 | type = MLD2_BLOCK_OLD_SOURCES; | |
1663 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1664 | skb = add_grec(skb, pmc, type, 1, 0); | |
1665 | skb = add_grec(skb, pmc, dtype, 1, 1); | |
1666 | } | |
1667 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1668 | if (pmc->mca_sfmode == MCAST_EXCLUDE) { |
1669 | type = MLD2_CHANGE_TO_INCLUDE; | |
1670 | skb = add_grec(skb, pmc, type, 1, 0); | |
1671 | } | |
5ab4a6c8 | 1672 | pmc->mca_crcount--; |
1da177e4 LT |
1673 | if (pmc->mca_crcount == 0) { |
1674 | mld_clear_zeros(&pmc->mca_tomb); | |
1675 | mld_clear_zeros(&pmc->mca_sources); | |
1676 | } | |
1677 | } | |
1678 | if (pmc->mca_crcount == 0 && !pmc->mca_tomb && | |
1679 | !pmc->mca_sources) { | |
1680 | if (pmc_prev) | |
1681 | pmc_prev->next = pmc_next; | |
1682 | else | |
1683 | idev->mc_tomb = pmc_next; | |
1684 | in6_dev_put(pmc->idev); | |
1685 | kfree(pmc); | |
1686 | } else | |
1687 | pmc_prev = pmc; | |
1688 | } | |
6457d26b | 1689 | spin_unlock(&idev->mc_lock); |
1da177e4 LT |
1690 | |
1691 | /* change recs */ | |
1692 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1693 | spin_lock_bh(&pmc->mca_lock); | |
1694 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1695 | type = MLD2_BLOCK_OLD_SOURCES; | |
1696 | dtype = MLD2_ALLOW_NEW_SOURCES; | |
1697 | } else { | |
1698 | type = MLD2_ALLOW_NEW_SOURCES; | |
1699 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1700 | } | |
1701 | skb = add_grec(skb, pmc, type, 0, 0); | |
1702 | skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */ | |
1703 | ||
1704 | /* filter mode changes */ | |
1705 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1706 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
1707 | type = MLD2_CHANGE_TO_EXCLUDE; | |
1708 | else | |
1709 | type = MLD2_CHANGE_TO_INCLUDE; | |
1710 | skb = add_grec(skb, pmc, type, 0, 0); | |
5ab4a6c8 | 1711 | pmc->mca_crcount--; |
1da177e4 LT |
1712 | } |
1713 | spin_unlock_bh(&pmc->mca_lock); | |
1714 | } | |
1715 | read_unlock_bh(&idev->lock); | |
1716 | if (!skb) | |
1717 | return; | |
1718 | (void) mld_sendpack(skb); | |
1719 | } | |
1720 | ||
1721 | static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type) | |
1722 | { | |
c346dca1 | 1723 | struct net *net = dev_net(dev); |
b8ad0cbc | 1724 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 | 1725 | struct inet6_dev *idev; |
1ab1457c | 1726 | struct sk_buff *skb; |
6e7cb837 | 1727 | struct mld_msg *hdr; |
d7aabf22 | 1728 | const struct in6_addr *snd_addr, *saddr; |
1da177e4 | 1729 | struct in6_addr addr_buf; |
1da177e4 LT |
1730 | int err, len, payload_len, full_len; |
1731 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1732 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1733 | IPV6_TLV_PADN, 0 }; | |
4c9483b2 | 1734 | struct flowi6 fl6; |
adf30907 | 1735 | struct dst_entry *dst; |
1da177e4 | 1736 | |
f3ee4010 YH |
1737 | if (type == ICMPV6_MGM_REDUCTION) |
1738 | snd_addr = &in6addr_linklocal_allrouters; | |
1739 | else | |
1740 | snd_addr = addr; | |
1da177e4 LT |
1741 | |
1742 | len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); | |
1743 | payload_len = len + sizeof(ra); | |
1744 | full_len = sizeof(struct ipv6hdr) + payload_len; | |
1745 | ||
edf391ff NH |
1746 | rcu_read_lock(); |
1747 | IP6_UPD_PO_STATS(net, __in6_dev_get(dev), | |
1748 | IPSTATS_MIB_OUT, full_len); | |
1749 | rcu_read_unlock(); | |
1750 | ||
f5184d26 | 1751 | skb = sock_alloc_send_skb(sk, LL_ALLOCATED_SPACE(dev) + full_len, 1, &err); |
1da177e4 LT |
1752 | |
1753 | if (skb == NULL) { | |
a11d206d | 1754 | rcu_read_lock(); |
3bd653c8 | 1755 | IP6_INC_STATS(net, __in6_dev_get(dev), |
a11d206d YH |
1756 | IPSTATS_MIB_OUTDISCARDS); |
1757 | rcu_read_unlock(); | |
1da177e4 LT |
1758 | return; |
1759 | } | |
1760 | ||
1761 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
1da177e4 | 1762 | |
95c385b4 | 1763 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1764 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1765 | * use unspecified address as the source address |
1da177e4 LT |
1766 | * when a valid link-local address is not available. |
1767 | */ | |
d7aabf22 YH |
1768 | saddr = &in6addr_any; |
1769 | } else | |
1770 | saddr = &addr_buf; | |
1da177e4 | 1771 | |
d7aabf22 | 1772 | ip6_nd_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len); |
1da177e4 LT |
1773 | |
1774 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1775 | ||
6e7cb837 YH |
1776 | hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg)); |
1777 | memset(hdr, 0, sizeof(struct mld_msg)); | |
1778 | hdr->mld_type = type; | |
1779 | ipv6_addr_copy(&hdr->mld_mca, addr); | |
1da177e4 | 1780 | |
6e7cb837 YH |
1781 | hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len, |
1782 | IPPROTO_ICMPV6, | |
1783 | csum_partial(hdr, len, 0)); | |
1da177e4 | 1784 | |
96b52e61 ED |
1785 | rcu_read_lock(); |
1786 | idev = __in6_dev_get(skb->dev); | |
1da177e4 | 1787 | |
adf30907 ED |
1788 | dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr); |
1789 | if (!dst) { | |
41927178 YH |
1790 | err = -ENOMEM; |
1791 | goto err_out; | |
1792 | } | |
1793 | ||
4c9483b2 | 1794 | icmpv6_flow_init(sk, &fl6, type, |
41927178 YH |
1795 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1796 | skb->dev->ifindex); | |
1797 | ||
4c9483b2 | 1798 | dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), NULL, 0); |
452edd59 DM |
1799 | if (IS_ERR(dst)) { |
1800 | err = PTR_ERR(dst); | |
41927178 | 1801 | goto err_out; |
452edd59 | 1802 | } |
41927178 | 1803 | |
adf30907 | 1804 | skb_dst_set(skb, dst); |
b2e0b385 | 1805 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
41927178 YH |
1806 | dst_output); |
1807 | out: | |
1da177e4 | 1808 | if (!err) { |
5c5d244b | 1809 | ICMP6MSGOUT_INC_STATS(net, idev, type); |
a862f6a6 | 1810 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); |
edf391ff | 1811 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len); |
1da177e4 | 1812 | } else |
3bd653c8 | 1813 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 | 1814 | |
96b52e61 | 1815 | rcu_read_unlock(); |
1da177e4 | 1816 | return; |
41927178 YH |
1817 | |
1818 | err_out: | |
1819 | kfree_skb(skb); | |
1820 | goto out; | |
1da177e4 LT |
1821 | } |
1822 | ||
1823 | static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode, | |
1824 | struct in6_addr *psfsrc) | |
1825 | { | |
1826 | struct ip6_sf_list *psf, *psf_prev; | |
1827 | int rv = 0; | |
1828 | ||
1829 | psf_prev = NULL; | |
1830 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1831 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) | |
1832 | break; | |
1833 | psf_prev = psf; | |
1834 | } | |
1835 | if (!psf || psf->sf_count[sfmode] == 0) { | |
1836 | /* source filter not found, or count wrong => bug */ | |
1837 | return -ESRCH; | |
1838 | } | |
1839 | psf->sf_count[sfmode]--; | |
1840 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { | |
1841 | struct inet6_dev *idev = pmc->idev; | |
1842 | ||
1843 | /* no more filters for this source */ | |
1844 | if (psf_prev) | |
1845 | psf_prev->sf_next = psf->sf_next; | |
1846 | else | |
1847 | pmc->mca_sources = psf->sf_next; | |
1848 | if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) && | |
1849 | !MLD_V1_SEEN(idev)) { | |
1850 | psf->sf_crcount = idev->mc_qrv; | |
1851 | psf->sf_next = pmc->mca_tomb; | |
1852 | pmc->mca_tomb = psf; | |
1853 | rv = 1; | |
1854 | } else | |
1855 | kfree(psf); | |
1856 | } | |
1857 | return rv; | |
1858 | } | |
1859 | ||
1860 | static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
1861 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
1862 | int delta) | |
1863 | { | |
1864 | struct ifmcaddr6 *pmc; | |
1865 | int changerec = 0; | |
1866 | int i, err; | |
1867 | ||
1868 | if (!idev) | |
1869 | return -ENODEV; | |
1870 | read_lock_bh(&idev->lock); | |
1871 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1872 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) | |
1873 | break; | |
1874 | } | |
1875 | if (!pmc) { | |
1876 | /* MCA not found?? bug */ | |
1877 | read_unlock_bh(&idev->lock); | |
1878 | return -ESRCH; | |
1879 | } | |
1880 | spin_lock_bh(&pmc->mca_lock); | |
1881 | sf_markstate(pmc); | |
1882 | if (!delta) { | |
1883 | if (!pmc->mca_sfcount[sfmode]) { | |
1884 | spin_unlock_bh(&pmc->mca_lock); | |
1885 | read_unlock_bh(&idev->lock); | |
1886 | return -EINVAL; | |
1887 | } | |
1888 | pmc->mca_sfcount[sfmode]--; | |
1889 | } | |
1890 | err = 0; | |
1891 | for (i=0; i<sfcount; i++) { | |
1892 | int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); | |
1893 | ||
1894 | changerec |= rv > 0; | |
1895 | if (!err && rv < 0) | |
1896 | err = rv; | |
1897 | } | |
1898 | if (pmc->mca_sfmode == MCAST_EXCLUDE && | |
1899 | pmc->mca_sfcount[MCAST_EXCLUDE] == 0 && | |
1900 | pmc->mca_sfcount[MCAST_INCLUDE]) { | |
1901 | struct ip6_sf_list *psf; | |
1902 | ||
1903 | /* filter mode change */ | |
1904 | pmc->mca_sfmode = MCAST_INCLUDE; | |
1905 | pmc->mca_crcount = idev->mc_qrv; | |
1906 | idev->mc_ifc_count = pmc->mca_crcount; | |
1907 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) | |
1908 | psf->sf_crcount = 0; | |
1909 | mld_ifc_event(pmc->idev); | |
1910 | } else if (sf_setstate(pmc) || changerec) | |
1911 | mld_ifc_event(pmc->idev); | |
1912 | spin_unlock_bh(&pmc->mca_lock); | |
1913 | read_unlock_bh(&idev->lock); | |
1914 | return err; | |
1915 | } | |
1916 | ||
1917 | /* | |
1918 | * Add multicast single-source filter to the interface list | |
1919 | */ | |
1920 | static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode, | |
1921 | struct in6_addr *psfsrc, int delta) | |
1922 | { | |
1923 | struct ip6_sf_list *psf, *psf_prev; | |
1924 | ||
1925 | psf_prev = NULL; | |
1926 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1927 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) | |
1928 | break; | |
1929 | psf_prev = psf; | |
1930 | } | |
1931 | if (!psf) { | |
0c600eda | 1932 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
1da177e4 LT |
1933 | if (!psf) |
1934 | return -ENOBUFS; | |
0c600eda | 1935 | |
1da177e4 LT |
1936 | psf->sf_addr = *psfsrc; |
1937 | if (psf_prev) { | |
1938 | psf_prev->sf_next = psf; | |
1939 | } else | |
1940 | pmc->mca_sources = psf; | |
1941 | } | |
1942 | psf->sf_count[sfmode]++; | |
1943 | return 0; | |
1944 | } | |
1945 | ||
1946 | static void sf_markstate(struct ifmcaddr6 *pmc) | |
1947 | { | |
1948 | struct ip6_sf_list *psf; | |
1949 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; | |
1950 | ||
1951 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) | |
1952 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1953 | psf->sf_oldin = mca_xcount == | |
1954 | psf->sf_count[MCAST_EXCLUDE] && | |
1955 | !psf->sf_count[MCAST_INCLUDE]; | |
1956 | } else | |
1957 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; | |
1958 | } | |
1959 | ||
1960 | static int sf_setstate(struct ifmcaddr6 *pmc) | |
1961 | { | |
7add2a43 | 1962 | struct ip6_sf_list *psf, *dpsf; |
1da177e4 LT |
1963 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
1964 | int qrv = pmc->idev->mc_qrv; | |
1965 | int new_in, rv; | |
1966 | ||
1967 | rv = 0; | |
1968 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1969 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1970 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && | |
1971 | !psf->sf_count[MCAST_INCLUDE]; | |
1972 | } else | |
1973 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; | |
7add2a43 DS |
1974 | if (new_in) { |
1975 | if (!psf->sf_oldin) { | |
e80e28b6 | 1976 | struct ip6_sf_list *prev = NULL; |
7add2a43 DS |
1977 | |
1978 | for (dpsf=pmc->mca_tomb; dpsf; | |
1979 | dpsf=dpsf->sf_next) { | |
1980 | if (ipv6_addr_equal(&dpsf->sf_addr, | |
1981 | &psf->sf_addr)) | |
1982 | break; | |
1983 | prev = dpsf; | |
1984 | } | |
1985 | if (dpsf) { | |
1986 | if (prev) | |
1987 | prev->sf_next = dpsf->sf_next; | |
1988 | else | |
1989 | pmc->mca_tomb = dpsf->sf_next; | |
1990 | kfree(dpsf); | |
1991 | } | |
1992 | psf->sf_crcount = qrv; | |
1993 | rv++; | |
1994 | } | |
1995 | } else if (psf->sf_oldin) { | |
1996 | psf->sf_crcount = 0; | |
1997 | /* | |
1998 | * add or update "delete" records if an active filter | |
1999 | * is now inactive | |
2000 | */ | |
2001 | for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next) | |
2002 | if (ipv6_addr_equal(&dpsf->sf_addr, | |
2003 | &psf->sf_addr)) | |
2004 | break; | |
2005 | if (!dpsf) { | |
5d55354f | 2006 | dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC); |
7add2a43 DS |
2007 | if (!dpsf) |
2008 | continue; | |
2009 | *dpsf = *psf; | |
2010 | /* pmc->mca_lock held by callers */ | |
2011 | dpsf->sf_next = pmc->mca_tomb; | |
2012 | pmc->mca_tomb = dpsf; | |
2013 | } | |
2014 | dpsf->sf_crcount = qrv; | |
1da177e4 LT |
2015 | rv++; |
2016 | } | |
2017 | } | |
2018 | return rv; | |
2019 | } | |
2020 | ||
2021 | /* | |
2022 | * Add multicast source filter list to the interface list | |
2023 | */ | |
2024 | static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
2025 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
2026 | int delta) | |
2027 | { | |
2028 | struct ifmcaddr6 *pmc; | |
2029 | int isexclude; | |
2030 | int i, err; | |
2031 | ||
2032 | if (!idev) | |
2033 | return -ENODEV; | |
2034 | read_lock_bh(&idev->lock); | |
2035 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
2036 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) | |
2037 | break; | |
2038 | } | |
2039 | if (!pmc) { | |
2040 | /* MCA not found?? bug */ | |
2041 | read_unlock_bh(&idev->lock); | |
2042 | return -ESRCH; | |
2043 | } | |
2044 | spin_lock_bh(&pmc->mca_lock); | |
2045 | ||
2046 | sf_markstate(pmc); | |
2047 | isexclude = pmc->mca_sfmode == MCAST_EXCLUDE; | |
2048 | if (!delta) | |
2049 | pmc->mca_sfcount[sfmode]++; | |
2050 | err = 0; | |
2051 | for (i=0; i<sfcount; i++) { | |
2052 | err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta); | |
2053 | if (err) | |
2054 | break; | |
2055 | } | |
2056 | if (err) { | |
2057 | int j; | |
2058 | ||
2059 | if (!delta) | |
2060 | pmc->mca_sfcount[sfmode]--; | |
2061 | for (j=0; j<i; j++) | |
2062 | (void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); | |
2063 | } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) { | |
1da177e4 LT |
2064 | struct ip6_sf_list *psf; |
2065 | ||
2066 | /* filter mode change */ | |
2067 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2068 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
2069 | else if (pmc->mca_sfcount[MCAST_INCLUDE]) | |
2070 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2071 | /* else no filters; keep old mode for reports */ | |
2072 | ||
2073 | pmc->mca_crcount = idev->mc_qrv; | |
2074 | idev->mc_ifc_count = pmc->mca_crcount; | |
2075 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) | |
2076 | psf->sf_crcount = 0; | |
2077 | mld_ifc_event(idev); | |
2078 | } else if (sf_setstate(pmc)) | |
2079 | mld_ifc_event(idev); | |
2080 | spin_unlock_bh(&pmc->mca_lock); | |
2081 | read_unlock_bh(&idev->lock); | |
2082 | return err; | |
2083 | } | |
2084 | ||
2085 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc) | |
2086 | { | |
2087 | struct ip6_sf_list *psf, *nextpsf; | |
2088 | ||
2089 | for (psf=pmc->mca_tomb; psf; psf=nextpsf) { | |
2090 | nextpsf = psf->sf_next; | |
2091 | kfree(psf); | |
2092 | } | |
2093 | pmc->mca_tomb = NULL; | |
2094 | for (psf=pmc->mca_sources; psf; psf=nextpsf) { | |
2095 | nextpsf = psf->sf_next; | |
2096 | kfree(psf); | |
2097 | } | |
2098 | pmc->mca_sources = NULL; | |
2099 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
de9daad9 | 2100 | pmc->mca_sfcount[MCAST_INCLUDE] = 0; |
1da177e4 LT |
2101 | pmc->mca_sfcount[MCAST_EXCLUDE] = 1; |
2102 | } | |
2103 | ||
2104 | ||
2105 | static void igmp6_join_group(struct ifmcaddr6 *ma) | |
2106 | { | |
2107 | unsigned long delay; | |
2108 | ||
2109 | if (ma->mca_flags & MAF_NOREPORT) | |
2110 | return; | |
2111 | ||
2112 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2113 | ||
2114 | delay = net_random() % IGMP6_UNSOLICITED_IVAL; | |
2115 | ||
2116 | spin_lock_bh(&ma->mca_lock); | |
2117 | if (del_timer(&ma->mca_timer)) { | |
2118 | atomic_dec(&ma->mca_refcnt); | |
2119 | delay = ma->mca_timer.expires - jiffies; | |
2120 | } | |
2121 | ||
2122 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
2123 | atomic_inc(&ma->mca_refcnt); | |
2124 | ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER; | |
2125 | spin_unlock_bh(&ma->mca_lock); | |
2126 | } | |
2127 | ||
2128 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
2129 | struct inet6_dev *idev) | |
2130 | { | |
2131 | int err; | |
2132 | ||
5ab4a6c8 DS |
2133 | /* callers have the socket lock and a write lock on ipv6_sk_mc_lock, |
2134 | * so no other readers or writers of iml or its sflist | |
2135 | */ | |
cfcabdcc | 2136 | if (!iml->sflist) { |
1da177e4 LT |
2137 | /* any-source empty exclude case */ |
2138 | return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0); | |
2139 | } | |
2140 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, | |
2141 | iml->sflist->sl_count, iml->sflist->sl_addr, 0); | |
2142 | sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max)); | |
2143 | iml->sflist = NULL; | |
2144 | return err; | |
2145 | } | |
2146 | ||
2147 | static void igmp6_leave_group(struct ifmcaddr6 *ma) | |
2148 | { | |
2149 | if (MLD_V1_SEEN(ma->idev)) { | |
2150 | if (ma->mca_flags & MAF_LAST_REPORTER) | |
2151 | igmp6_send(&ma->mca_addr, ma->idev->dev, | |
2152 | ICMPV6_MGM_REDUCTION); | |
2153 | } else { | |
2154 | mld_add_delrec(ma->idev, ma); | |
2155 | mld_ifc_event(ma->idev); | |
2156 | } | |
2157 | } | |
2158 | ||
2159 | static void mld_gq_timer_expire(unsigned long data) | |
2160 | { | |
2161 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2162 | ||
2163 | idev->mc_gq_running = 0; | |
2164 | mld_send_report(idev, NULL); | |
2165 | __in6_dev_put(idev); | |
2166 | } | |
2167 | ||
2168 | static void mld_ifc_timer_expire(unsigned long data) | |
2169 | { | |
2170 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2171 | ||
2172 | mld_send_cr(idev); | |
2173 | if (idev->mc_ifc_count) { | |
2174 | idev->mc_ifc_count--; | |
2175 | if (idev->mc_ifc_count) | |
2176 | mld_ifc_start_timer(idev, idev->mc_maxdelay); | |
2177 | } | |
2178 | __in6_dev_put(idev); | |
2179 | } | |
2180 | ||
2181 | static void mld_ifc_event(struct inet6_dev *idev) | |
2182 | { | |
2183 | if (MLD_V1_SEEN(idev)) | |
2184 | return; | |
2185 | idev->mc_ifc_count = idev->mc_qrv; | |
2186 | mld_ifc_start_timer(idev, 1); | |
2187 | } | |
2188 | ||
2189 | ||
2190 | static void igmp6_timer_handler(unsigned long data) | |
2191 | { | |
2192 | struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data; | |
2193 | ||
2194 | if (MLD_V1_SEEN(ma->idev)) | |
2195 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2196 | else | |
2197 | mld_send_report(ma->idev, ma); | |
2198 | ||
2199 | spin_lock(&ma->mca_lock); | |
2200 | ma->mca_flags |= MAF_LAST_REPORTER; | |
2201 | ma->mca_flags &= ~MAF_TIMER_RUNNING; | |
2202 | spin_unlock(&ma->mca_lock); | |
2203 | ma_put(ma); | |
2204 | } | |
2205 | ||
75c78500 MS |
2206 | /* Device changing type */ |
2207 | ||
2208 | void ipv6_mc_unmap(struct inet6_dev *idev) | |
2209 | { | |
2210 | struct ifmcaddr6 *i; | |
2211 | ||
2212 | /* Install multicast list, except for all-nodes (already installed) */ | |
2213 | ||
2214 | read_lock_bh(&idev->lock); | |
2215 | for (i = idev->mc_list; i; i = i->next) | |
2216 | igmp6_group_dropped(i); | |
2217 | read_unlock_bh(&idev->lock); | |
2218 | } | |
2219 | ||
2220 | void ipv6_mc_remap(struct inet6_dev *idev) | |
2221 | { | |
2222 | ipv6_mc_up(idev); | |
2223 | } | |
2224 | ||
1da177e4 LT |
2225 | /* Device going down */ |
2226 | ||
2227 | void ipv6_mc_down(struct inet6_dev *idev) | |
2228 | { | |
2229 | struct ifmcaddr6 *i; | |
2230 | ||
2231 | /* Withdraw multicast list */ | |
2232 | ||
2233 | read_lock_bh(&idev->lock); | |
2234 | idev->mc_ifc_count = 0; | |
2235 | if (del_timer(&idev->mc_ifc_timer)) | |
2236 | __in6_dev_put(idev); | |
2237 | idev->mc_gq_running = 0; | |
2238 | if (del_timer(&idev->mc_gq_timer)) | |
2239 | __in6_dev_put(idev); | |
2240 | ||
2241 | for (i = idev->mc_list; i; i=i->next) | |
2242 | igmp6_group_dropped(i); | |
2243 | read_unlock_bh(&idev->lock); | |
2244 | ||
2245 | mld_clear_delrec(idev); | |
2246 | } | |
2247 | ||
2248 | ||
2249 | /* Device going up */ | |
2250 | ||
2251 | void ipv6_mc_up(struct inet6_dev *idev) | |
2252 | { | |
2253 | struct ifmcaddr6 *i; | |
2254 | ||
2255 | /* Install multicast list, except for all-nodes (already installed) */ | |
2256 | ||
2257 | read_lock_bh(&idev->lock); | |
2258 | for (i = idev->mc_list; i; i=i->next) | |
2259 | igmp6_group_added(i); | |
2260 | read_unlock_bh(&idev->lock); | |
2261 | } | |
2262 | ||
2263 | /* IPv6 device initialization. */ | |
2264 | ||
2265 | void ipv6_mc_init_dev(struct inet6_dev *idev) | |
2266 | { | |
1da177e4 | 2267 | write_lock_bh(&idev->lock); |
6457d26b | 2268 | spin_lock_init(&idev->mc_lock); |
1da177e4 | 2269 | idev->mc_gq_running = 0; |
b24b8a24 PE |
2270 | setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire, |
2271 | (unsigned long)idev); | |
1da177e4 LT |
2272 | idev->mc_tomb = NULL; |
2273 | idev->mc_ifc_count = 0; | |
b24b8a24 PE |
2274 | setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire, |
2275 | (unsigned long)idev); | |
1da177e4 LT |
2276 | idev->mc_qrv = MLD_QRV_DEFAULT; |
2277 | idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL; | |
2278 | idev->mc_v1_seen = 0; | |
2279 | write_unlock_bh(&idev->lock); | |
1da177e4 LT |
2280 | } |
2281 | ||
2282 | /* | |
2283 | * Device is about to be destroyed: clean up. | |
2284 | */ | |
2285 | ||
2286 | void ipv6_mc_destroy_dev(struct inet6_dev *idev) | |
2287 | { | |
2288 | struct ifmcaddr6 *i; | |
1da177e4 LT |
2289 | |
2290 | /* Deactivate timers */ | |
2291 | ipv6_mc_down(idev); | |
2292 | ||
2293 | /* Delete all-nodes address. */ | |
1da177e4 LT |
2294 | /* We cannot call ipv6_dev_mc_dec() directly, our caller in |
2295 | * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will | |
2296 | * fail. | |
2297 | */ | |
f3ee4010 | 2298 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes); |
1da177e4 | 2299 | |
f3ee4010 YH |
2300 | if (idev->cnf.forwarding) |
2301 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters); | |
1da177e4 LT |
2302 | |
2303 | write_lock_bh(&idev->lock); | |
2304 | while ((i = idev->mc_list) != NULL) { | |
2305 | idev->mc_list = i->next; | |
2306 | write_unlock_bh(&idev->lock); | |
2307 | ||
2308 | igmp6_group_dropped(i); | |
2309 | ma_put(i); | |
2310 | ||
2311 | write_lock_bh(&idev->lock); | |
2312 | } | |
2313 | write_unlock_bh(&idev->lock); | |
2314 | } | |
2315 | ||
2316 | #ifdef CONFIG_PROC_FS | |
2317 | struct igmp6_mc_iter_state { | |
b8ad0cbc | 2318 | struct seq_net_private p; |
1da177e4 LT |
2319 | struct net_device *dev; |
2320 | struct inet6_dev *idev; | |
2321 | }; | |
2322 | ||
2323 | #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private) | |
2324 | ||
2325 | static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq) | |
2326 | { | |
2327 | struct ifmcaddr6 *im = NULL; | |
2328 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
1218854a | 2329 | struct net *net = seq_file_net(seq); |
1da177e4 | 2330 | |
7562f876 | 2331 | state->idev = NULL; |
ce81b76a | 2332 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2333 | struct inet6_dev *idev; |
ce81b76a | 2334 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2335 | if (!idev) |
2336 | continue; | |
2337 | read_lock_bh(&idev->lock); | |
2338 | im = idev->mc_list; | |
2339 | if (im) { | |
2340 | state->idev = idev; | |
2341 | break; | |
2342 | } | |
2343 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2344 | } |
2345 | return im; | |
2346 | } | |
2347 | ||
2348 | static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im) | |
2349 | { | |
2350 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2351 | ||
2352 | im = im->next; | |
2353 | while (!im) { | |
ce81b76a | 2354 | if (likely(state->idev != NULL)) |
1da177e4 | 2355 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2356 | |
2357 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2358 | if (!state->dev) { |
2359 | state->idev = NULL; | |
2360 | break; | |
2361 | } | |
ce81b76a | 2362 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2363 | if (!state->idev) |
2364 | continue; | |
2365 | read_lock_bh(&state->idev->lock); | |
2366 | im = state->idev->mc_list; | |
2367 | } | |
2368 | return im; | |
2369 | } | |
2370 | ||
2371 | static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos) | |
2372 | { | |
2373 | struct ifmcaddr6 *im = igmp6_mc_get_first(seq); | |
2374 | if (im) | |
2375 | while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL) | |
2376 | --pos; | |
2377 | return pos ? NULL : im; | |
2378 | } | |
2379 | ||
2380 | static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2381 | __acquires(RCU) |
1da177e4 | 2382 | { |
ce81b76a | 2383 | rcu_read_lock(); |
1da177e4 LT |
2384 | return igmp6_mc_get_idx(seq, *pos); |
2385 | } | |
2386 | ||
2387 | static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2388 | { | |
ce81b76a ED |
2389 | struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v); |
2390 | ||
1da177e4 LT |
2391 | ++*pos; |
2392 | return im; | |
2393 | } | |
2394 | ||
2395 | static void igmp6_mc_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2396 | __releases(RCU) |
1da177e4 LT |
2397 | { |
2398 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
ce81b76a | 2399 | |
1da177e4 LT |
2400 | if (likely(state->idev != NULL)) { |
2401 | read_unlock_bh(&state->idev->lock); | |
1da177e4 LT |
2402 | state->idev = NULL; |
2403 | } | |
2404 | state->dev = NULL; | |
ce81b76a | 2405 | rcu_read_unlock(); |
1da177e4 LT |
2406 | } |
2407 | ||
2408 | static int igmp6_mc_seq_show(struct seq_file *seq, void *v) | |
2409 | { | |
2410 | struct ifmcaddr6 *im = (struct ifmcaddr6 *)v; | |
2411 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2412 | ||
2413 | seq_printf(seq, | |
4b7a4274 | 2414 | "%-4d %-15s %pi6 %5d %08X %ld\n", |
1da177e4 | 2415 | state->dev->ifindex, state->dev->name, |
b071195d | 2416 | &im->mca_addr, |
1da177e4 LT |
2417 | im->mca_users, im->mca_flags, |
2418 | (im->mca_flags&MAF_TIMER_RUNNING) ? | |
2419 | jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0); | |
2420 | return 0; | |
2421 | } | |
2422 | ||
56b3d975 | 2423 | static const struct seq_operations igmp6_mc_seq_ops = { |
1da177e4 LT |
2424 | .start = igmp6_mc_seq_start, |
2425 | .next = igmp6_mc_seq_next, | |
2426 | .stop = igmp6_mc_seq_stop, | |
2427 | .show = igmp6_mc_seq_show, | |
2428 | }; | |
2429 | ||
2430 | static int igmp6_mc_seq_open(struct inode *inode, struct file *file) | |
2431 | { | |
b8ad0cbc DL |
2432 | return seq_open_net(inode, file, &igmp6_mc_seq_ops, |
2433 | sizeof(struct igmp6_mc_iter_state)); | |
1da177e4 LT |
2434 | } |
2435 | ||
9a32144e | 2436 | static const struct file_operations igmp6_mc_seq_fops = { |
1da177e4 LT |
2437 | .owner = THIS_MODULE, |
2438 | .open = igmp6_mc_seq_open, | |
2439 | .read = seq_read, | |
2440 | .llseek = seq_lseek, | |
b8ad0cbc | 2441 | .release = seq_release_net, |
1da177e4 LT |
2442 | }; |
2443 | ||
2444 | struct igmp6_mcf_iter_state { | |
b8ad0cbc | 2445 | struct seq_net_private p; |
1da177e4 LT |
2446 | struct net_device *dev; |
2447 | struct inet6_dev *idev; | |
2448 | struct ifmcaddr6 *im; | |
2449 | }; | |
2450 | ||
2451 | #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private) | |
2452 | ||
2453 | static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq) | |
2454 | { | |
2455 | struct ip6_sf_list *psf = NULL; | |
2456 | struct ifmcaddr6 *im = NULL; | |
2457 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
1218854a | 2458 | struct net *net = seq_file_net(seq); |
1da177e4 | 2459 | |
7562f876 PE |
2460 | state->idev = NULL; |
2461 | state->im = NULL; | |
ce81b76a | 2462 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2463 | struct inet6_dev *idev; |
ce81b76a | 2464 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2465 | if (unlikely(idev == NULL)) |
2466 | continue; | |
2467 | read_lock_bh(&idev->lock); | |
2468 | im = idev->mc_list; | |
2469 | if (likely(im != NULL)) { | |
2470 | spin_lock_bh(&im->mca_lock); | |
2471 | psf = im->mca_sources; | |
2472 | if (likely(psf != NULL)) { | |
2473 | state->im = im; | |
2474 | state->idev = idev; | |
2475 | break; | |
2476 | } | |
2477 | spin_unlock_bh(&im->mca_lock); | |
2478 | } | |
2479 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2480 | } |
2481 | return psf; | |
2482 | } | |
2483 | ||
2484 | static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf) | |
2485 | { | |
2486 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2487 | ||
2488 | psf = psf->sf_next; | |
2489 | while (!psf) { | |
2490 | spin_unlock_bh(&state->im->mca_lock); | |
2491 | state->im = state->im->next; | |
2492 | while (!state->im) { | |
ce81b76a | 2493 | if (likely(state->idev != NULL)) |
1da177e4 | 2494 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2495 | |
2496 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2497 | if (!state->dev) { |
2498 | state->idev = NULL; | |
2499 | goto out; | |
2500 | } | |
ce81b76a | 2501 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2502 | if (!state->idev) |
2503 | continue; | |
2504 | read_lock_bh(&state->idev->lock); | |
2505 | state->im = state->idev->mc_list; | |
2506 | } | |
2507 | if (!state->im) | |
2508 | break; | |
2509 | spin_lock_bh(&state->im->mca_lock); | |
2510 | psf = state->im->mca_sources; | |
2511 | } | |
2512 | out: | |
2513 | return psf; | |
2514 | } | |
2515 | ||
2516 | static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos) | |
2517 | { | |
2518 | struct ip6_sf_list *psf = igmp6_mcf_get_first(seq); | |
2519 | if (psf) | |
2520 | while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL) | |
2521 | --pos; | |
2522 | return pos ? NULL : psf; | |
2523 | } | |
2524 | ||
2525 | static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2526 | __acquires(RCU) |
1da177e4 | 2527 | { |
ce81b76a | 2528 | rcu_read_lock(); |
1da177e4 LT |
2529 | return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
2530 | } | |
2531 | ||
2532 | static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2533 | { | |
2534 | struct ip6_sf_list *psf; | |
2535 | if (v == SEQ_START_TOKEN) | |
2536 | psf = igmp6_mcf_get_first(seq); | |
2537 | else | |
2538 | psf = igmp6_mcf_get_next(seq, v); | |
2539 | ++*pos; | |
2540 | return psf; | |
2541 | } | |
2542 | ||
2543 | static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2544 | __releases(RCU) |
1da177e4 LT |
2545 | { |
2546 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2547 | if (likely(state->im != NULL)) { | |
2548 | spin_unlock_bh(&state->im->mca_lock); | |
2549 | state->im = NULL; | |
2550 | } | |
2551 | if (likely(state->idev != NULL)) { | |
2552 | read_unlock_bh(&state->idev->lock); | |
1da177e4 LT |
2553 | state->idev = NULL; |
2554 | } | |
2555 | state->dev = NULL; | |
ce81b76a | 2556 | rcu_read_unlock(); |
1da177e4 LT |
2557 | } |
2558 | ||
2559 | static int igmp6_mcf_seq_show(struct seq_file *seq, void *v) | |
2560 | { | |
2561 | struct ip6_sf_list *psf = (struct ip6_sf_list *)v; | |
2562 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2563 | ||
2564 | if (v == SEQ_START_TOKEN) { | |
1ab1457c | 2565 | seq_printf(seq, |
1da177e4 | 2566 | "%3s %6s " |
9343e79a | 2567 | "%32s %32s %6s %6s\n", "Idx", |
1da177e4 LT |
2568 | "Device", "Multicast Address", |
2569 | "Source Address", "INC", "EXC"); | |
2570 | } else { | |
2571 | seq_printf(seq, | |
4b7a4274 | 2572 | "%3d %6.6s %pi6 %pi6 %6lu %6lu\n", |
1da177e4 | 2573 | state->dev->ifindex, state->dev->name, |
b071195d HH |
2574 | &state->im->mca_addr, |
2575 | &psf->sf_addr, | |
1da177e4 LT |
2576 | psf->sf_count[MCAST_INCLUDE], |
2577 | psf->sf_count[MCAST_EXCLUDE]); | |
2578 | } | |
2579 | return 0; | |
2580 | } | |
2581 | ||
56b3d975 | 2582 | static const struct seq_operations igmp6_mcf_seq_ops = { |
1da177e4 LT |
2583 | .start = igmp6_mcf_seq_start, |
2584 | .next = igmp6_mcf_seq_next, | |
2585 | .stop = igmp6_mcf_seq_stop, | |
2586 | .show = igmp6_mcf_seq_show, | |
2587 | }; | |
2588 | ||
2589 | static int igmp6_mcf_seq_open(struct inode *inode, struct file *file) | |
2590 | { | |
b8ad0cbc DL |
2591 | return seq_open_net(inode, file, &igmp6_mcf_seq_ops, |
2592 | sizeof(struct igmp6_mcf_iter_state)); | |
1da177e4 LT |
2593 | } |
2594 | ||
9a32144e | 2595 | static const struct file_operations igmp6_mcf_seq_fops = { |
1da177e4 LT |
2596 | .owner = THIS_MODULE, |
2597 | .open = igmp6_mcf_seq_open, | |
2598 | .read = seq_read, | |
2599 | .llseek = seq_lseek, | |
b8ad0cbc | 2600 | .release = seq_release_net, |
1da177e4 | 2601 | }; |
ea82edf7 | 2602 | |
2c8c1e72 | 2603 | static int __net_init igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2604 | { |
2605 | int err; | |
2606 | ||
2607 | err = -ENOMEM; | |
2608 | if (!proc_net_fops_create(net, "igmp6", S_IRUGO, &igmp6_mc_seq_fops)) | |
2609 | goto out; | |
2610 | if (!proc_net_fops_create(net, "mcfilter6", S_IRUGO, | |
2611 | &igmp6_mcf_seq_fops)) | |
2612 | goto out_proc_net_igmp6; | |
2613 | ||
2614 | err = 0; | |
2615 | out: | |
2616 | return err; | |
2617 | ||
2618 | out_proc_net_igmp6: | |
2619 | proc_net_remove(net, "igmp6"); | |
2620 | goto out; | |
2621 | } | |
2622 | ||
2c8c1e72 | 2623 | static void __net_exit igmp6_proc_exit(struct net *net) |
ea82edf7 DL |
2624 | { |
2625 | proc_net_remove(net, "mcfilter6"); | |
2626 | proc_net_remove(net, "igmp6"); | |
2627 | } | |
2628 | #else | |
2c8c1e72 | 2629 | static inline int igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2630 | { |
2631 | return 0; | |
2632 | } | |
2c8c1e72 | 2633 | static inline void igmp6_proc_exit(struct net *net) |
ea82edf7 | 2634 | { |
ea82edf7 | 2635 | } |
1da177e4 LT |
2636 | #endif |
2637 | ||
2c8c1e72 | 2638 | static int __net_init igmp6_net_init(struct net *net) |
1da177e4 | 2639 | { |
1da177e4 LT |
2640 | int err; |
2641 | ||
1ed8516f DL |
2642 | err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6, |
2643 | SOCK_RAW, IPPROTO_ICMPV6, net); | |
1da177e4 LT |
2644 | if (err < 0) { |
2645 | printk(KERN_ERR | |
2646 | "Failed to initialize the IGMP6 control socket (err %d).\n", | |
2647 | err); | |
b8ad0cbc | 2648 | goto out; |
1da177e4 LT |
2649 | } |
2650 | ||
1ed8516f | 2651 | inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1; |
1da177e4 | 2652 | |
ea82edf7 DL |
2653 | err = igmp6_proc_init(net); |
2654 | if (err) | |
b8ad0cbc | 2655 | goto out_sock_create; |
b8ad0cbc DL |
2656 | out: |
2657 | return err; | |
2658 | ||
2659 | out_sock_create: | |
1ed8516f | 2660 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
b8ad0cbc | 2661 | goto out; |
1da177e4 LT |
2662 | } |
2663 | ||
2c8c1e72 | 2664 | static void __net_exit igmp6_net_exit(struct net *net) |
1da177e4 | 2665 | { |
1ed8516f | 2666 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
ea82edf7 | 2667 | igmp6_proc_exit(net); |
1da177e4 | 2668 | } |
b8ad0cbc DL |
2669 | |
2670 | static struct pernet_operations igmp6_net_ops = { | |
2671 | .init = igmp6_net_init, | |
2672 | .exit = igmp6_net_exit, | |
2673 | }; | |
2674 | ||
2675 | int __init igmp6_init(void) | |
2676 | { | |
2677 | return register_pernet_subsys(&igmp6_net_ops); | |
2678 | } | |
2679 | ||
2680 | void igmp6_cleanup(void) | |
2681 | { | |
2682 | unregister_pernet_subsys(&igmp6_net_ops); | |
2683 | } |