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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); | |
b71d1d42 | 95 | static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *addr); |
1da177e4 LT |
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); | |
b71d1d42 ED |
100 | static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
101 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 | 102 | int delta); |
b71d1d42 ED |
103 | static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
104 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
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; | |
4e3fd7a0 | 158 | mc_lst->addr = *addr; |
1da177e4 | 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 | 164 | if (rt) { |
d1918542 | 165 | dev = rt->dst.dev; |
94e187c0 | 166 | ip6_rt_put(rt); |
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 | ||
204 | /* | |
205 | * socket leave on multicast group | |
206 | */ | |
9acd9f3a | 207 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) |
1da177e4 LT |
208 | { |
209 | struct ipv6_pinfo *np = inet6_sk(sk); | |
456b61bc ED |
210 | struct ipv6_mc_socklist *mc_lst; |
211 | struct ipv6_mc_socklist __rcu **lnk; | |
3b1e0a65 | 212 | struct net *net = sock_net(sk); |
1da177e4 | 213 | |
a858d64b LW |
214 | if (!ipv6_addr_is_multicast(addr)) |
215 | return -EINVAL; | |
216 | ||
456b61bc ED |
217 | spin_lock(&ipv6_sk_mc_lock); |
218 | for (lnk = &np->ipv6_mc_list; | |
219 | (mc_lst = rcu_dereference_protected(*lnk, | |
220 | lockdep_is_held(&ipv6_sk_mc_lock))) !=NULL ; | |
221 | lnk = &mc_lst->next) { | |
1da177e4 LT |
222 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
223 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
224 | struct net_device *dev; | |
225 | ||
226 | *lnk = mc_lst->next; | |
456b61bc | 227 | spin_unlock(&ipv6_sk_mc_lock); |
1da177e4 | 228 | |
96b52e61 ED |
229 | rcu_read_lock(); |
230 | dev = dev_get_by_index_rcu(net, mc_lst->ifindex); | |
b8ad0cbc | 231 | if (dev != NULL) { |
96b52e61 | 232 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 233 | |
acd6e00b | 234 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 235 | if (idev) |
1da177e4 | 236 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
237 | } else |
238 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
96b52e61 | 239 | rcu_read_unlock(); |
456b61bc | 240 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 241 | kfree_rcu(mc_lst, rcu); |
1da177e4 LT |
242 | return 0; |
243 | } | |
244 | } | |
456b61bc | 245 | spin_unlock(&ipv6_sk_mc_lock); |
1da177e4 | 246 | |
9951f036 | 247 | return -EADDRNOTAVAIL; |
1da177e4 LT |
248 | } |
249 | ||
96b52e61 ED |
250 | /* called with rcu_read_lock() */ |
251 | static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net, | |
b71d1d42 | 252 | const struct in6_addr *group, |
96b52e61 | 253 | int ifindex) |
1da177e4 LT |
254 | { |
255 | struct net_device *dev = NULL; | |
256 | struct inet6_dev *idev = NULL; | |
257 | ||
258 | if (ifindex == 0) { | |
96b52e61 | 259 | struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0); |
1da177e4 | 260 | |
1da177e4 | 261 | if (rt) { |
d1918542 | 262 | dev = rt->dst.dev; |
94e187c0 | 263 | ip6_rt_put(rt); |
1da177e4 LT |
264 | } |
265 | } else | |
96b52e61 | 266 | dev = dev_get_by_index_rcu(net, ifindex); |
1da177e4 LT |
267 | |
268 | if (!dev) | |
96b52e61 ED |
269 | return NULL; |
270 | idev = __in6_dev_get(dev); | |
448eb71f | 271 | if (!idev) |
8a22c99a | 272 | return NULL; |
1da177e4 | 273 | read_lock_bh(&idev->lock); |
96b52e61 ED |
274 | if (idev->dead) { |
275 | read_unlock_bh(&idev->lock); | |
276 | return NULL; | |
277 | } | |
1da177e4 LT |
278 | return idev; |
279 | } | |
280 | ||
281 | void ipv6_sock_mc_close(struct sock *sk) | |
282 | { | |
283 | struct ipv6_pinfo *np = inet6_sk(sk); | |
284 | struct ipv6_mc_socklist *mc_lst; | |
3b1e0a65 | 285 | struct net *net = sock_net(sk); |
1da177e4 | 286 | |
0e1efe9d ED |
287 | if (!rcu_access_pointer(np->ipv6_mc_list)) |
288 | return; | |
289 | ||
456b61bc ED |
290 | spin_lock(&ipv6_sk_mc_lock); |
291 | while ((mc_lst = rcu_dereference_protected(np->ipv6_mc_list, | |
292 | lockdep_is_held(&ipv6_sk_mc_lock))) != NULL) { | |
1da177e4 LT |
293 | struct net_device *dev; |
294 | ||
295 | np->ipv6_mc_list = mc_lst->next; | |
456b61bc | 296 | spin_unlock(&ipv6_sk_mc_lock); |
1da177e4 | 297 | |
96b52e61 ED |
298 | rcu_read_lock(); |
299 | dev = dev_get_by_index_rcu(net, mc_lst->ifindex); | |
1da177e4 | 300 | if (dev) { |
96b52e61 | 301 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 302 | |
acd6e00b | 303 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 304 | if (idev) |
1da177e4 | 305 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
306 | } else |
307 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
96b52e61 | 308 | rcu_read_unlock(); |
1da177e4 | 309 | |
456b61bc | 310 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 311 | kfree_rcu(mc_lst, rcu); |
456b61bc ED |
312 | |
313 | spin_lock(&ipv6_sk_mc_lock); | |
1da177e4 | 314 | } |
456b61bc | 315 | spin_unlock(&ipv6_sk_mc_lock); |
1da177e4 LT |
316 | } |
317 | ||
318 | int ip6_mc_source(int add, int omode, struct sock *sk, | |
319 | struct group_source_req *pgsr) | |
320 | { | |
321 | struct in6_addr *source, *group; | |
322 | struct ipv6_mc_socklist *pmc; | |
1da177e4 LT |
323 | struct inet6_dev *idev; |
324 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
325 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 326 | struct net *net = sock_net(sk); |
1da177e4 | 327 | int i, j, rv; |
c9e3e8b6 | 328 | int leavegroup = 0; |
5ab4a6c8 | 329 | int pmclocked = 0; |
1da177e4 LT |
330 | int err; |
331 | ||
1da177e4 LT |
332 | source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr; |
333 | group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr; | |
334 | ||
335 | if (!ipv6_addr_is_multicast(group)) | |
336 | return -EINVAL; | |
337 | ||
96b52e61 ED |
338 | rcu_read_lock(); |
339 | idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface); | |
340 | if (!idev) { | |
341 | rcu_read_unlock(); | |
1da177e4 | 342 | return -ENODEV; |
96b52e61 | 343 | } |
1da177e4 LT |
344 | |
345 | err = -EADDRNOTAVAIL; | |
346 | ||
456b61bc | 347 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
348 | if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface) |
349 | continue; | |
350 | if (ipv6_addr_equal(&pmc->addr, group)) | |
351 | break; | |
352 | } | |
917f2f10 DS |
353 | if (!pmc) { /* must have a prior join */ |
354 | err = -EINVAL; | |
1da177e4 | 355 | goto done; |
917f2f10 | 356 | } |
1da177e4 LT |
357 | /* if a source filter was set, must be the same mode as before */ |
358 | if (pmc->sflist) { | |
917f2f10 DS |
359 | if (pmc->sfmode != omode) { |
360 | err = -EINVAL; | |
1da177e4 | 361 | goto done; |
917f2f10 | 362 | } |
1da177e4 LT |
363 | } else if (pmc->sfmode != omode) { |
364 | /* allow mode switches for empty-set filters */ | |
365 | ip6_mc_add_src(idev, group, omode, 0, NULL, 0); | |
366 | ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
367 | pmc->sfmode = omode; | |
368 | } | |
369 | ||
96b52e61 | 370 | write_lock(&pmc->sflock); |
5ab4a6c8 DS |
371 | pmclocked = 1; |
372 | ||
1da177e4 LT |
373 | psl = pmc->sflist; |
374 | if (!add) { | |
375 | if (!psl) | |
917f2f10 | 376 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 LT |
377 | rv = !0; |
378 | for (i=0; i<psl->sl_count; i++) { | |
07c2fecc | 379 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
1da177e4 LT |
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++) { | |
07c2fecc | 429 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
56db1c5f JS |
430 | if (rv == 0) /* There is an error in the address. */ |
431 | goto done; | |
1da177e4 | 432 | } |
1da177e4 LT |
433 | for (j=psl->sl_count-1; j>=i; j--) |
434 | psl->sl_addr[j+1] = psl->sl_addr[j]; | |
435 | psl->sl_addr[i] = *source; | |
436 | psl->sl_count++; | |
437 | err = 0; | |
438 | /* update the interface list */ | |
439 | ip6_mc_add_src(idev, group, omode, 1, source, 1); | |
440 | done: | |
5ab4a6c8 | 441 | if (pmclocked) |
96b52e61 | 442 | write_unlock(&pmc->sflock); |
1da177e4 | 443 | read_unlock_bh(&idev->lock); |
96b52e61 | 444 | rcu_read_unlock(); |
c9e3e8b6 DS |
445 | if (leavegroup) |
446 | return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group); | |
1da177e4 LT |
447 | return err; |
448 | } | |
449 | ||
450 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) | |
451 | { | |
b71d1d42 | 452 | const struct in6_addr *group; |
1da177e4 | 453 | struct ipv6_mc_socklist *pmc; |
1da177e4 LT |
454 | struct inet6_dev *idev; |
455 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
456 | struct ip6_sf_socklist *newpsl, *psl; | |
3b1e0a65 | 457 | struct net *net = sock_net(sk); |
9951f036 | 458 | int leavegroup = 0; |
1da177e4 LT |
459 | int i, err; |
460 | ||
461 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
462 | ||
463 | if (!ipv6_addr_is_multicast(group)) | |
464 | return -EINVAL; | |
465 | if (gsf->gf_fmode != MCAST_INCLUDE && | |
466 | gsf->gf_fmode != MCAST_EXCLUDE) | |
467 | return -EINVAL; | |
468 | ||
96b52e61 ED |
469 | rcu_read_lock(); |
470 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 471 | |
96b52e61 ED |
472 | if (!idev) { |
473 | rcu_read_unlock(); | |
1da177e4 | 474 | return -ENODEV; |
96b52e61 | 475 | } |
1da177e4 | 476 | |
9c05989b | 477 | err = 0; |
5ab4a6c8 | 478 | |
9951f036 DS |
479 | if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) { |
480 | leavegroup = 1; | |
481 | goto done; | |
482 | } | |
483 | ||
456b61bc | 484 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
485 | if (pmc->ifindex != gsf->gf_interface) |
486 | continue; | |
487 | if (ipv6_addr_equal(&pmc->addr, group)) | |
488 | break; | |
489 | } | |
917f2f10 DS |
490 | if (!pmc) { /* must have a prior join */ |
491 | err = -EINVAL; | |
1da177e4 | 492 | goto done; |
917f2f10 | 493 | } |
1da177e4 | 494 | if (gsf->gf_numsrc) { |
8b3a7005 KK |
495 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc), |
496 | GFP_ATOMIC); | |
1da177e4 LT |
497 | if (!newpsl) { |
498 | err = -ENOBUFS; | |
499 | goto done; | |
500 | } | |
501 | newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc; | |
502 | for (i=0; i<newpsl->sl_count; ++i) { | |
503 | struct sockaddr_in6 *psin6; | |
504 | ||
505 | psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i]; | |
506 | newpsl->sl_addr[i] = psin6->sin6_addr; | |
507 | } | |
508 | err = ip6_mc_add_src(idev, group, gsf->gf_fmode, | |
509 | newpsl->sl_count, newpsl->sl_addr, 0); | |
510 | if (err) { | |
511 | sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); | |
512 | goto done; | |
513 | } | |
8713dbf0 | 514 | } else { |
1da177e4 | 515 | newpsl = NULL; |
8713dbf0 YZ |
516 | (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); |
517 | } | |
5ab4a6c8 | 518 | |
96b52e61 | 519 | write_lock(&pmc->sflock); |
1da177e4 LT |
520 | psl = pmc->sflist; |
521 | if (psl) { | |
522 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, | |
523 | psl->sl_count, psl->sl_addr, 0); | |
524 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
525 | } else | |
526 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
527 | pmc->sflist = newpsl; | |
528 | pmc->sfmode = gsf->gf_fmode; | |
96b52e61 | 529 | write_unlock(&pmc->sflock); |
917f2f10 | 530 | err = 0; |
1da177e4 LT |
531 | done: |
532 | read_unlock_bh(&idev->lock); | |
96b52e61 | 533 | rcu_read_unlock(); |
9951f036 DS |
534 | if (leavegroup) |
535 | err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group); | |
1da177e4 LT |
536 | return err; |
537 | } | |
538 | ||
539 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
540 | struct group_filter __user *optval, int __user *optlen) | |
541 | { | |
542 | int err, i, count, copycount; | |
b71d1d42 | 543 | const struct in6_addr *group; |
1da177e4 LT |
544 | struct ipv6_mc_socklist *pmc; |
545 | struct inet6_dev *idev; | |
1da177e4 LT |
546 | struct ipv6_pinfo *inet6 = inet6_sk(sk); |
547 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 548 | struct net *net = sock_net(sk); |
1da177e4 LT |
549 | |
550 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
551 | ||
552 | if (!ipv6_addr_is_multicast(group)) | |
553 | return -EINVAL; | |
554 | ||
96b52e61 ED |
555 | rcu_read_lock(); |
556 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 557 | |
96b52e61 ED |
558 | if (!idev) { |
559 | rcu_read_unlock(); | |
1da177e4 | 560 | return -ENODEV; |
96b52e61 | 561 | } |
1da177e4 LT |
562 | |
563 | err = -EADDRNOTAVAIL; | |
5ab4a6c8 DS |
564 | /* |
565 | * changes to the ipv6_mc_list require the socket lock and | |
566 | * a read lock on ip6_sk_mc_lock. We have the socket lock, | |
567 | * so reading the list is safe. | |
568 | */ | |
1da177e4 | 569 | |
456b61bc | 570 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
571 | if (pmc->ifindex != gsf->gf_interface) |
572 | continue; | |
573 | if (ipv6_addr_equal(group, &pmc->addr)) | |
574 | break; | |
575 | } | |
576 | if (!pmc) /* must have a prior join */ | |
577 | goto done; | |
578 | gsf->gf_fmode = pmc->sfmode; | |
579 | psl = pmc->sflist; | |
580 | count = psl ? psl->sl_count : 0; | |
581 | read_unlock_bh(&idev->lock); | |
96b52e61 | 582 | rcu_read_unlock(); |
1da177e4 LT |
583 | |
584 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; | |
585 | gsf->gf_numsrc = count; | |
586 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || | |
587 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { | |
588 | return -EFAULT; | |
589 | } | |
5ab4a6c8 DS |
590 | /* changes to psl require the socket lock, a read lock on |
591 | * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We | |
592 | * have the socket lock, so reading here is safe. | |
593 | */ | |
1da177e4 LT |
594 | for (i=0; i<copycount; i++) { |
595 | struct sockaddr_in6 *psin6; | |
596 | struct sockaddr_storage ss; | |
597 | ||
598 | psin6 = (struct sockaddr_in6 *)&ss; | |
599 | memset(&ss, 0, sizeof(ss)); | |
600 | psin6->sin6_family = AF_INET6; | |
601 | psin6->sin6_addr = psl->sl_addr[i]; | |
1ab1457c | 602 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) |
1da177e4 LT |
603 | return -EFAULT; |
604 | } | |
605 | return 0; | |
606 | done: | |
607 | read_unlock_bh(&idev->lock); | |
96b52e61 | 608 | rcu_read_unlock(); |
1da177e4 LT |
609 | return err; |
610 | } | |
611 | ||
a50feda5 ED |
612 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, |
613 | const struct in6_addr *src_addr) | |
1da177e4 LT |
614 | { |
615 | struct ipv6_pinfo *np = inet6_sk(sk); | |
616 | struct ipv6_mc_socklist *mc; | |
617 | struct ip6_sf_socklist *psl; | |
a50feda5 | 618 | bool rv = true; |
1da177e4 | 619 | |
456b61bc ED |
620 | rcu_read_lock(); |
621 | for_each_pmc_rcu(np, mc) { | |
1da177e4 LT |
622 | if (ipv6_addr_equal(&mc->addr, mc_addr)) |
623 | break; | |
624 | } | |
625 | if (!mc) { | |
456b61bc | 626 | rcu_read_unlock(); |
a50feda5 | 627 | return true; |
1da177e4 | 628 | } |
5ab4a6c8 | 629 | read_lock(&mc->sflock); |
1da177e4 LT |
630 | psl = mc->sflist; |
631 | if (!psl) { | |
632 | rv = mc->sfmode == MCAST_EXCLUDE; | |
633 | } else { | |
634 | int i; | |
635 | ||
636 | for (i=0; i<psl->sl_count; i++) { | |
637 | if (ipv6_addr_equal(&psl->sl_addr[i], src_addr)) | |
638 | break; | |
639 | } | |
640 | if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) | |
a50feda5 | 641 | rv = false; |
1da177e4 | 642 | if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) |
a50feda5 | 643 | rv = false; |
1da177e4 | 644 | } |
5ab4a6c8 | 645 | read_unlock(&mc->sflock); |
456b61bc | 646 | rcu_read_unlock(); |
1da177e4 LT |
647 | |
648 | return rv; | |
649 | } | |
650 | ||
651 | static void ma_put(struct ifmcaddr6 *mc) | |
652 | { | |
653 | if (atomic_dec_and_test(&mc->mca_refcnt)) { | |
654 | in6_dev_put(mc->idev); | |
655 | kfree(mc); | |
656 | } | |
657 | } | |
658 | ||
659 | static void igmp6_group_added(struct ifmcaddr6 *mc) | |
660 | { | |
661 | struct net_device *dev = mc->idev->dev; | |
662 | char buf[MAX_ADDR_LEN]; | |
663 | ||
ec16ef22 YH |
664 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
665 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
666 | return; | |
667 | ||
1da177e4 LT |
668 | spin_lock_bh(&mc->mca_lock); |
669 | if (!(mc->mca_flags&MAF_LOADED)) { | |
670 | mc->mca_flags |= MAF_LOADED; | |
671 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 672 | dev_mc_add(dev, buf); |
1da177e4 LT |
673 | } |
674 | spin_unlock_bh(&mc->mca_lock); | |
675 | ||
676 | if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT)) | |
677 | return; | |
678 | ||
679 | if (MLD_V1_SEEN(mc->idev)) { | |
680 | igmp6_join_group(mc); | |
681 | return; | |
682 | } | |
683 | /* else v2 */ | |
684 | ||
685 | mc->mca_crcount = mc->idev->mc_qrv; | |
686 | mld_ifc_event(mc->idev); | |
687 | } | |
688 | ||
689 | static void igmp6_group_dropped(struct ifmcaddr6 *mc) | |
690 | { | |
691 | struct net_device *dev = mc->idev->dev; | |
692 | char buf[MAX_ADDR_LEN]; | |
693 | ||
ec16ef22 YH |
694 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
695 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
696 | return; | |
697 | ||
1da177e4 LT |
698 | spin_lock_bh(&mc->mca_lock); |
699 | if (mc->mca_flags&MAF_LOADED) { | |
700 | mc->mca_flags &= ~MAF_LOADED; | |
701 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 702 | dev_mc_del(dev, buf); |
1da177e4 LT |
703 | } |
704 | ||
705 | if (mc->mca_flags & MAF_NOREPORT) | |
706 | goto done; | |
707 | spin_unlock_bh(&mc->mca_lock); | |
708 | ||
709 | if (!mc->idev->dead) | |
710 | igmp6_leave_group(mc); | |
711 | ||
712 | spin_lock_bh(&mc->mca_lock); | |
713 | if (del_timer(&mc->mca_timer)) | |
714 | atomic_dec(&mc->mca_refcnt); | |
715 | done: | |
716 | ip6_mc_clear_src(mc); | |
717 | spin_unlock_bh(&mc->mca_lock); | |
718 | } | |
719 | ||
720 | /* | |
721 | * deleted ifmcaddr6 manipulation | |
722 | */ | |
723 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) | |
724 | { | |
725 | struct ifmcaddr6 *pmc; | |
726 | ||
727 | /* this is an "ifmcaddr6" for convenience; only the fields below | |
728 | * are actually used. In particular, the refcnt and users are not | |
729 | * used for management of the delete list. Using the same structure | |
730 | * for deleted items allows change reports to use common code with | |
731 | * non-deleted or query-response MCA's. | |
732 | */ | |
0c600eda | 733 | pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC); |
1da177e4 LT |
734 | if (!pmc) |
735 | return; | |
0c600eda | 736 | |
1da177e4 LT |
737 | spin_lock_bh(&im->mca_lock); |
738 | spin_lock_init(&pmc->mca_lock); | |
739 | pmc->idev = im->idev; | |
740 | in6_dev_hold(idev); | |
741 | pmc->mca_addr = im->mca_addr; | |
742 | pmc->mca_crcount = idev->mc_qrv; | |
743 | pmc->mca_sfmode = im->mca_sfmode; | |
744 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
745 | struct ip6_sf_list *psf; | |
746 | ||
747 | pmc->mca_tomb = im->mca_tomb; | |
748 | pmc->mca_sources = im->mca_sources; | |
749 | im->mca_tomb = im->mca_sources = NULL; | |
750 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) | |
751 | psf->sf_crcount = pmc->mca_crcount; | |
752 | } | |
753 | spin_unlock_bh(&im->mca_lock); | |
754 | ||
6457d26b | 755 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
756 | pmc->next = idev->mc_tomb; |
757 | idev->mc_tomb = pmc; | |
6457d26b | 758 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
759 | } |
760 | ||
b71d1d42 | 761 | static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *pmca) |
1da177e4 LT |
762 | { |
763 | struct ifmcaddr6 *pmc, *pmc_prev; | |
764 | struct ip6_sf_list *psf, *psf_next; | |
765 | ||
6457d26b | 766 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
767 | pmc_prev = NULL; |
768 | for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) { | |
769 | if (ipv6_addr_equal(&pmc->mca_addr, pmca)) | |
770 | break; | |
771 | pmc_prev = pmc; | |
772 | } | |
773 | if (pmc) { | |
774 | if (pmc_prev) | |
775 | pmc_prev->next = pmc->next; | |
776 | else | |
777 | idev->mc_tomb = pmc->next; | |
778 | } | |
6457d26b SH |
779 | spin_unlock_bh(&idev->mc_lock); |
780 | ||
1da177e4 LT |
781 | if (pmc) { |
782 | for (psf=pmc->mca_tomb; psf; psf=psf_next) { | |
783 | psf_next = psf->sf_next; | |
784 | kfree(psf); | |
785 | } | |
786 | in6_dev_put(pmc->idev); | |
787 | kfree(pmc); | |
788 | } | |
789 | } | |
790 | ||
791 | static void mld_clear_delrec(struct inet6_dev *idev) | |
792 | { | |
793 | struct ifmcaddr6 *pmc, *nextpmc; | |
794 | ||
6457d26b | 795 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
796 | pmc = idev->mc_tomb; |
797 | idev->mc_tomb = NULL; | |
6457d26b | 798 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
799 | |
800 | for (; pmc; pmc = nextpmc) { | |
801 | nextpmc = pmc->next; | |
802 | ip6_mc_clear_src(pmc); | |
803 | in6_dev_put(pmc->idev); | |
804 | kfree(pmc); | |
805 | } | |
806 | ||
807 | /* clear dead sources, too */ | |
808 | read_lock_bh(&idev->lock); | |
809 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
810 | struct ip6_sf_list *psf, *psf_next; | |
811 | ||
812 | spin_lock_bh(&pmc->mca_lock); | |
813 | psf = pmc->mca_tomb; | |
814 | pmc->mca_tomb = NULL; | |
815 | spin_unlock_bh(&pmc->mca_lock); | |
816 | for (; psf; psf=psf_next) { | |
817 | psf_next = psf->sf_next; | |
818 | kfree(psf); | |
819 | } | |
820 | } | |
821 | read_unlock_bh(&idev->lock); | |
822 | } | |
823 | ||
824 | ||
825 | /* | |
826 | * device multicast group inc (add if not found) | |
827 | */ | |
9acd9f3a | 828 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
829 | { |
830 | struct ifmcaddr6 *mc; | |
831 | struct inet6_dev *idev; | |
832 | ||
96b52e61 | 833 | /* we need to take a reference on idev */ |
1da177e4 LT |
834 | idev = in6_dev_get(dev); |
835 | ||
836 | if (idev == NULL) | |
837 | return -EINVAL; | |
838 | ||
839 | write_lock_bh(&idev->lock); | |
840 | if (idev->dead) { | |
841 | write_unlock_bh(&idev->lock); | |
842 | in6_dev_put(idev); | |
843 | return -ENODEV; | |
844 | } | |
845 | ||
846 | for (mc = idev->mc_list; mc; mc = mc->next) { | |
847 | if (ipv6_addr_equal(&mc->mca_addr, addr)) { | |
848 | mc->mca_users++; | |
849 | write_unlock_bh(&idev->lock); | |
850 | ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0, | |
851 | NULL, 0); | |
852 | in6_dev_put(idev); | |
853 | return 0; | |
854 | } | |
855 | } | |
856 | ||
857 | /* | |
858 | * not found: create a new one. | |
859 | */ | |
860 | ||
0c600eda | 861 | mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC); |
1da177e4 LT |
862 | |
863 | if (mc == NULL) { | |
864 | write_unlock_bh(&idev->lock); | |
865 | in6_dev_put(idev); | |
866 | return -ENOMEM; | |
867 | } | |
868 | ||
b24b8a24 | 869 | setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc); |
1da177e4 | 870 | |
4e3fd7a0 | 871 | mc->mca_addr = *addr; |
96b52e61 | 872 | mc->idev = idev; /* (reference taken) */ |
1da177e4 LT |
873 | mc->mca_users = 1; |
874 | /* mca_stamp should be updated upon changes */ | |
875 | mc->mca_cstamp = mc->mca_tstamp = jiffies; | |
876 | atomic_set(&mc->mca_refcnt, 2); | |
877 | spin_lock_init(&mc->mca_lock); | |
878 | ||
879 | /* initial mode is (EX, empty) */ | |
880 | mc->mca_sfmode = MCAST_EXCLUDE; | |
881 | mc->mca_sfcount[MCAST_EXCLUDE] = 1; | |
882 | ||
883 | if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) || | |
884 | IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
885 | mc->mca_flags |= MAF_NOREPORT; | |
886 | ||
887 | mc->next = idev->mc_list; | |
888 | idev->mc_list = mc; | |
889 | write_unlock_bh(&idev->lock); | |
890 | ||
891 | mld_del_delrec(idev, &mc->mca_addr); | |
892 | igmp6_group_added(mc); | |
893 | ma_put(mc); | |
894 | return 0; | |
895 | } | |
896 | ||
897 | /* | |
898 | * device multicast group del | |
899 | */ | |
9acd9f3a | 900 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
901 | { |
902 | struct ifmcaddr6 *ma, **map; | |
903 | ||
904 | write_lock_bh(&idev->lock); | |
905 | for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) { | |
906 | if (ipv6_addr_equal(&ma->mca_addr, addr)) { | |
907 | if (--ma->mca_users == 0) { | |
908 | *map = ma->next; | |
909 | write_unlock_bh(&idev->lock); | |
910 | ||
911 | igmp6_group_dropped(ma); | |
912 | ||
913 | ma_put(ma); | |
914 | return 0; | |
915 | } | |
916 | write_unlock_bh(&idev->lock); | |
917 | return 0; | |
918 | } | |
919 | } | |
920 | write_unlock_bh(&idev->lock); | |
921 | ||
922 | return -ENOENT; | |
923 | } | |
924 | ||
9acd9f3a | 925 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 | 926 | { |
96b52e61 | 927 | struct inet6_dev *idev; |
1da177e4 LT |
928 | int err; |
929 | ||
96b52e61 | 930 | rcu_read_lock(); |
1da177e4 | 931 | |
96b52e61 ED |
932 | idev = __in6_dev_get(dev); |
933 | if (!idev) | |
934 | err = -ENODEV; | |
935 | else | |
936 | err = __ipv6_dev_mc_dec(idev, addr); | |
1da177e4 | 937 | |
96b52e61 | 938 | rcu_read_unlock(); |
1da177e4 LT |
939 | return err; |
940 | } | |
941 | ||
1da177e4 LT |
942 | /* |
943 | * check if the interface/address pair is valid | |
944 | */ | |
a50feda5 ED |
945 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, |
946 | const struct in6_addr *src_addr) | |
1da177e4 LT |
947 | { |
948 | struct inet6_dev *idev; | |
949 | struct ifmcaddr6 *mc; | |
a50feda5 | 950 | bool rv = false; |
1da177e4 | 951 | |
96b52e61 ED |
952 | rcu_read_lock(); |
953 | idev = __in6_dev_get(dev); | |
1da177e4 LT |
954 | if (idev) { |
955 | read_lock_bh(&idev->lock); | |
956 | for (mc = idev->mc_list; mc; mc=mc->next) { | |
957 | if (ipv6_addr_equal(&mc->mca_addr, group)) | |
958 | break; | |
959 | } | |
960 | if (mc) { | |
961 | if (src_addr && !ipv6_addr_any(src_addr)) { | |
962 | struct ip6_sf_list *psf; | |
963 | ||
964 | spin_lock_bh(&mc->mca_lock); | |
965 | for (psf=mc->mca_sources;psf;psf=psf->sf_next) { | |
966 | if (ipv6_addr_equal(&psf->sf_addr, src_addr)) | |
967 | break; | |
968 | } | |
969 | if (psf) | |
970 | rv = psf->sf_count[MCAST_INCLUDE] || | |
971 | psf->sf_count[MCAST_EXCLUDE] != | |
972 | mc->mca_sfcount[MCAST_EXCLUDE]; | |
973 | else | |
974 | rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0; | |
975 | spin_unlock_bh(&mc->mca_lock); | |
976 | } else | |
a50feda5 | 977 | rv = true; /* don't filter unspecified source */ |
1da177e4 LT |
978 | } |
979 | read_unlock_bh(&idev->lock); | |
1da177e4 | 980 | } |
96b52e61 | 981 | rcu_read_unlock(); |
1da177e4 LT |
982 | return rv; |
983 | } | |
984 | ||
985 | static void mld_gq_start_timer(struct inet6_dev *idev) | |
986 | { | |
987 | int tv = net_random() % idev->mc_maxdelay; | |
988 | ||
989 | idev->mc_gq_running = 1; | |
990 | if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2)) | |
991 | in6_dev_hold(idev); | |
992 | } | |
993 | ||
994 | static void mld_ifc_start_timer(struct inet6_dev *idev, int delay) | |
995 | { | |
996 | int tv = net_random() % delay; | |
997 | ||
998 | if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2)) | |
999 | in6_dev_hold(idev); | |
1000 | } | |
1001 | ||
1002 | /* | |
1003 | * IGMP handling (alias multicast ICMPv6 messages) | |
1004 | */ | |
1005 | ||
1006 | static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) | |
1007 | { | |
1008 | unsigned long delay = resptime; | |
1009 | ||
1010 | /* Do not start timer for these addresses */ | |
1011 | if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) || | |
1012 | IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
1013 | return; | |
1014 | ||
1015 | if (del_timer(&ma->mca_timer)) { | |
1016 | atomic_dec(&ma->mca_refcnt); | |
1017 | delay = ma->mca_timer.expires - jiffies; | |
1018 | } | |
1019 | ||
1020 | if (delay >= resptime) { | |
1021 | if (resptime) | |
1022 | delay = net_random() % resptime; | |
1023 | else | |
1024 | delay = 1; | |
1025 | } | |
1026 | ma->mca_timer.expires = jiffies + delay; | |
1027 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
1028 | atomic_inc(&ma->mca_refcnt); | |
1029 | ma->mca_flags |= MAF_TIMER_RUNNING; | |
1030 | } | |
1031 | ||
5ab4a6c8 | 1032 | /* mark EXCLUDE-mode sources */ |
a50feda5 ED |
1033 | static bool mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs, |
1034 | const struct in6_addr *srcs) | |
1da177e4 LT |
1035 | { |
1036 | struct ip6_sf_list *psf; | |
1037 | int i, scount; | |
1038 | ||
1039 | scount = 0; | |
1040 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1041 | if (scount == nsrcs) | |
1042 | break; | |
5ab4a6c8 DS |
1043 | for (i=0; i<nsrcs; i++) { |
1044 | /* skip inactive filters */ | |
e05c4ad3 | 1045 | if (psf->sf_count[MCAST_INCLUDE] || |
5ab4a6c8 DS |
1046 | pmc->mca_sfcount[MCAST_EXCLUDE] != |
1047 | psf->sf_count[MCAST_EXCLUDE]) | |
ce713ee5 | 1048 | break; |
5ab4a6c8 DS |
1049 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1050 | scount++; | |
1051 | break; | |
1052 | } | |
1053 | } | |
1054 | } | |
1055 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1056 | if (scount == nsrcs) /* all sources excluded */ | |
a50feda5 ED |
1057 | return false; |
1058 | return true; | |
5ab4a6c8 DS |
1059 | } |
1060 | ||
a50feda5 ED |
1061 | static bool mld_marksources(struct ifmcaddr6 *pmc, int nsrcs, |
1062 | const struct in6_addr *srcs) | |
5ab4a6c8 DS |
1063 | { |
1064 | struct ip6_sf_list *psf; | |
1065 | int i, scount; | |
1066 | ||
1067 | if (pmc->mca_sfmode == MCAST_EXCLUDE) | |
1068 | return mld_xmarksources(pmc, nsrcs, srcs); | |
1069 | ||
1070 | /* mark INCLUDE-mode sources */ | |
1071 | ||
1072 | scount = 0; | |
1073 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1074 | if (scount == nsrcs) | |
1075 | break; | |
1076 | for (i=0; i<nsrcs; i++) { | |
1da177e4 LT |
1077 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1078 | psf->sf_gsresp = 1; | |
1079 | scount++; | |
1080 | break; | |
1081 | } | |
5ab4a6c8 DS |
1082 | } |
1083 | } | |
1084 | if (!scount) { | |
1085 | pmc->mca_flags &= ~MAF_GSQUERY; | |
a50feda5 | 1086 | return false; |
1da177e4 | 1087 | } |
5ab4a6c8 | 1088 | pmc->mca_flags |= MAF_GSQUERY; |
a50feda5 | 1089 | return true; |
1da177e4 LT |
1090 | } |
1091 | ||
96b52e61 | 1092 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1093 | int igmp6_event_query(struct sk_buff *skb) |
1094 | { | |
97300b5f | 1095 | struct mld2_query *mlh2 = NULL; |
1da177e4 | 1096 | struct ifmcaddr6 *ma; |
b71d1d42 | 1097 | const struct in6_addr *group; |
1da177e4 LT |
1098 | unsigned long max_delay; |
1099 | struct inet6_dev *idev; | |
6e7cb837 | 1100 | struct mld_msg *mld; |
1da177e4 LT |
1101 | int group_type; |
1102 | int mark = 0; | |
1103 | int len; | |
1104 | ||
1105 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) | |
1106 | return -EINVAL; | |
1107 | ||
1108 | /* compute payload length excluding extension headers */ | |
0660e03f | 1109 | len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); |
cfe1fc77 | 1110 | len -= skb_network_header_len(skb); |
1da177e4 LT |
1111 | |
1112 | /* Drop queries with not link local source */ | |
0660e03f | 1113 | if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) |
1da177e4 LT |
1114 | return -EINVAL; |
1115 | ||
96b52e61 | 1116 | idev = __in6_dev_get(skb->dev); |
1da177e4 LT |
1117 | |
1118 | if (idev == NULL) | |
1119 | return 0; | |
1120 | ||
6e7cb837 YH |
1121 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1122 | group = &mld->mld_mca; | |
1da177e4 LT |
1123 | group_type = ipv6_addr_type(group); |
1124 | ||
1125 | if (group_type != IPV6_ADDR_ANY && | |
96b52e61 | 1126 | !(group_type&IPV6_ADDR_MULTICAST)) |
1da177e4 | 1127 | return -EINVAL; |
1da177e4 LT |
1128 | |
1129 | if (len == 24) { | |
1130 | int switchback; | |
1131 | /* MLDv1 router present */ | |
1132 | ||
1133 | /* Translate milliseconds to jiffies */ | |
6e7cb837 | 1134 | max_delay = (ntohs(mld->mld_maxdelay)*HZ)/1000; |
1da177e4 LT |
1135 | |
1136 | switchback = (idev->mc_qrv + 1) * max_delay; | |
1137 | idev->mc_v1_seen = jiffies + switchback; | |
1138 | ||
1139 | /* cancel the interface change timer */ | |
1140 | idev->mc_ifc_count = 0; | |
1141 | if (del_timer(&idev->mc_ifc_timer)) | |
1142 | __in6_dev_put(idev); | |
1143 | /* clear deleted report items */ | |
1144 | mld_clear_delrec(idev); | |
1145 | } else if (len >= 28) { | |
1ab1457c | 1146 | int srcs_offset = sizeof(struct mld2_query) - |
97300b5f | 1147 | sizeof(struct icmp6hdr); |
96b52e61 | 1148 | if (!pskb_may_pull(skb, srcs_offset)) |
97300b5f | 1149 | return -EINVAL; |
96b52e61 | 1150 | |
9c70220b | 1151 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
6e7cb837 | 1152 | max_delay = (MLDV2_MRC(ntohs(mlh2->mld2q_mrc))*HZ)/1000; |
1da177e4 LT |
1153 | if (!max_delay) |
1154 | max_delay = 1; | |
1155 | idev->mc_maxdelay = max_delay; | |
6e7cb837 YH |
1156 | if (mlh2->mld2q_qrv) |
1157 | idev->mc_qrv = mlh2->mld2q_qrv; | |
1da177e4 | 1158 | if (group_type == IPV6_ADDR_ANY) { /* general query */ |
96b52e61 | 1159 | if (mlh2->mld2q_nsrcs) |
1da177e4 | 1160 | return -EINVAL; /* no sources allowed */ |
96b52e61 | 1161 | |
1da177e4 | 1162 | mld_gq_start_timer(idev); |
1da177e4 LT |
1163 | return 0; |
1164 | } | |
1165 | /* mark sources to include, if group & source-specific */ | |
6e7cb837 | 1166 | if (mlh2->mld2q_nsrcs != 0) { |
1ab1457c | 1167 | if (!pskb_may_pull(skb, srcs_offset + |
96b52e61 | 1168 | ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr))) |
97300b5f | 1169 | return -EINVAL; |
96b52e61 | 1170 | |
9c70220b | 1171 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
97300b5f YZ |
1172 | mark = 1; |
1173 | } | |
96b52e61 | 1174 | } else |
1da177e4 | 1175 | return -EINVAL; |
1da177e4 LT |
1176 | |
1177 | read_lock_bh(&idev->lock); | |
1178 | if (group_type == IPV6_ADDR_ANY) { | |
1179 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
1180 | spin_lock_bh(&ma->mca_lock); | |
1181 | igmp6_group_queried(ma, max_delay); | |
1182 | spin_unlock_bh(&ma->mca_lock); | |
1183 | } | |
1184 | } else { | |
1185 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
7add2a43 | 1186 | if (!ipv6_addr_equal(group, &ma->mca_addr)) |
1da177e4 LT |
1187 | continue; |
1188 | spin_lock_bh(&ma->mca_lock); | |
1189 | if (ma->mca_flags & MAF_TIMER_RUNNING) { | |
1190 | /* gsquery <- gsquery && mark */ | |
1191 | if (!mark) | |
1192 | ma->mca_flags &= ~MAF_GSQUERY; | |
1193 | } else { | |
1194 | /* gsquery <- mark */ | |
1195 | if (mark) | |
1196 | ma->mca_flags |= MAF_GSQUERY; | |
1197 | else | |
1198 | ma->mca_flags &= ~MAF_GSQUERY; | |
1199 | } | |
5ab4a6c8 | 1200 | if (!(ma->mca_flags & MAF_GSQUERY) || |
6e7cb837 | 1201 | mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs)) |
5ab4a6c8 | 1202 | igmp6_group_queried(ma, max_delay); |
1da177e4 | 1203 | spin_unlock_bh(&ma->mca_lock); |
7add2a43 | 1204 | break; |
1da177e4 LT |
1205 | } |
1206 | } | |
1207 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1208 | |
1209 | return 0; | |
1210 | } | |
1211 | ||
96b52e61 | 1212 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1213 | int igmp6_event_report(struct sk_buff *skb) |
1214 | { | |
1215 | struct ifmcaddr6 *ma; | |
1da177e4 | 1216 | struct inet6_dev *idev; |
6e7cb837 | 1217 | struct mld_msg *mld; |
1da177e4 LT |
1218 | int addr_type; |
1219 | ||
1220 | /* Our own report looped back. Ignore it. */ | |
1221 | if (skb->pkt_type == PACKET_LOOPBACK) | |
1222 | return 0; | |
1223 | ||
24c69275 DS |
1224 | /* send our report if the MC router may not have heard this report */ |
1225 | if (skb->pkt_type != PACKET_MULTICAST && | |
1226 | skb->pkt_type != PACKET_BROADCAST) | |
1227 | return 0; | |
1228 | ||
6e7cb837 | 1229 | if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr))) |
1da177e4 LT |
1230 | return -EINVAL; |
1231 | ||
6e7cb837 | 1232 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1da177e4 LT |
1233 | |
1234 | /* Drop reports with not link local source */ | |
0660e03f | 1235 | addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr); |
1ab1457c | 1236 | if (addr_type != IPV6_ADDR_ANY && |
1da177e4 LT |
1237 | !(addr_type&IPV6_ADDR_LINKLOCAL)) |
1238 | return -EINVAL; | |
1239 | ||
96b52e61 | 1240 | idev = __in6_dev_get(skb->dev); |
1da177e4 LT |
1241 | if (idev == NULL) |
1242 | return -ENODEV; | |
1243 | ||
1244 | /* | |
1245 | * Cancel the timer for this group | |
1246 | */ | |
1247 | ||
1248 | read_lock_bh(&idev->lock); | |
1249 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
6e7cb837 | 1250 | if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) { |
1da177e4 LT |
1251 | spin_lock(&ma->mca_lock); |
1252 | if (del_timer(&ma->mca_timer)) | |
1253 | atomic_dec(&ma->mca_refcnt); | |
1254 | ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING); | |
1255 | spin_unlock(&ma->mca_lock); | |
1256 | break; | |
1257 | } | |
1258 | } | |
1259 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1260 | return 0; |
1261 | } | |
1262 | ||
a50feda5 ED |
1263 | static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type, |
1264 | int gdeleted, int sdeleted) | |
1da177e4 LT |
1265 | { |
1266 | switch (type) { | |
1267 | case MLD2_MODE_IS_INCLUDE: | |
1268 | case MLD2_MODE_IS_EXCLUDE: | |
1269 | if (gdeleted || sdeleted) | |
a50feda5 | 1270 | return false; |
5ab4a6c8 DS |
1271 | if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) { |
1272 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
a50feda5 | 1273 | return true; |
5ab4a6c8 DS |
1274 | /* don't include if this source is excluded |
1275 | * in all filters | |
1276 | */ | |
1277 | if (psf->sf_count[MCAST_INCLUDE]) | |
7add2a43 | 1278 | return type == MLD2_MODE_IS_INCLUDE; |
5ab4a6c8 DS |
1279 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1280 | psf->sf_count[MCAST_EXCLUDE]; | |
1281 | } | |
a50feda5 | 1282 | return false; |
1da177e4 LT |
1283 | case MLD2_CHANGE_TO_INCLUDE: |
1284 | if (gdeleted || sdeleted) | |
a50feda5 | 1285 | return false; |
1da177e4 LT |
1286 | return psf->sf_count[MCAST_INCLUDE] != 0; |
1287 | case MLD2_CHANGE_TO_EXCLUDE: | |
1288 | if (gdeleted || sdeleted) | |
a50feda5 | 1289 | return false; |
1da177e4 LT |
1290 | if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 || |
1291 | psf->sf_count[MCAST_INCLUDE]) | |
a50feda5 | 1292 | return false; |
1da177e4 LT |
1293 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1294 | psf->sf_count[MCAST_EXCLUDE]; | |
1295 | case MLD2_ALLOW_NEW_SOURCES: | |
1296 | if (gdeleted || !psf->sf_crcount) | |
a50feda5 | 1297 | return false; |
1da177e4 LT |
1298 | return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted; |
1299 | case MLD2_BLOCK_OLD_SOURCES: | |
1300 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1301 | return gdeleted || (psf->sf_crcount && sdeleted); | |
1302 | return psf->sf_crcount && !gdeleted && !sdeleted; | |
1303 | } | |
a50feda5 | 1304 | return false; |
1da177e4 LT |
1305 | } |
1306 | ||
1307 | static int | |
1308 | mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted) | |
1309 | { | |
1310 | struct ip6_sf_list *psf; | |
1311 | int scount = 0; | |
1312 | ||
1313 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1314 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) | |
1315 | continue; | |
1316 | scount++; | |
1317 | } | |
1318 | return scount; | |
1319 | } | |
1320 | ||
2576f17d YH |
1321 | static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb, |
1322 | struct net_device *dev, | |
1323 | const struct in6_addr *saddr, | |
1324 | const struct in6_addr *daddr, | |
1325 | int proto, int len) | |
1326 | { | |
1327 | struct ipv6hdr *hdr; | |
1328 | ||
1329 | skb->protocol = htons(ETH_P_IPV6); | |
1330 | skb->dev = dev; | |
1331 | ||
1332 | skb_reset_network_header(skb); | |
1333 | skb_put(skb, sizeof(struct ipv6hdr)); | |
1334 | hdr = ipv6_hdr(skb); | |
1335 | ||
1336 | ip6_flow_hdr(hdr, 0, 0); | |
1337 | ||
1338 | hdr->payload_len = htons(len); | |
1339 | hdr->nexthdr = proto; | |
1340 | hdr->hop_limit = inet6_sk(sk)->hop_limit; | |
1341 | ||
1342 | hdr->saddr = *saddr; | |
1343 | hdr->daddr = *daddr; | |
1344 | } | |
1345 | ||
1da177e4 LT |
1346 | static struct sk_buff *mld_newpack(struct net_device *dev, int size) |
1347 | { | |
c346dca1 | 1348 | struct net *net = dev_net(dev); |
b8ad0cbc | 1349 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 LT |
1350 | struct sk_buff *skb; |
1351 | struct mld2_report *pmr; | |
1352 | struct in6_addr addr_buf; | |
d7aabf22 | 1353 | const struct in6_addr *saddr; |
a7ae1992 HX |
1354 | int hlen = LL_RESERVED_SPACE(dev); |
1355 | int tlen = dev->needed_tailroom; | |
1da177e4 LT |
1356 | int err; |
1357 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1358 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1359 | IPV6_TLV_PADN, 0 }; | |
1360 | ||
1361 | /* we assume size > sizeof(ra) here */ | |
a7ae1992 | 1362 | size += hlen + tlen; |
72e09ad1 ED |
1363 | /* limit our allocations to order-0 page */ |
1364 | size = min_t(int, size, SKB_MAX_ORDER(0, 0)); | |
1365 | skb = sock_alloc_send_skb(sk, size, 1, &err); | |
1da177e4 | 1366 | |
cfcabdcc | 1367 | if (!skb) |
1da177e4 LT |
1368 | return NULL; |
1369 | ||
a7ae1992 | 1370 | skb_reserve(skb, hlen); |
1da177e4 | 1371 | |
95c385b4 | 1372 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1373 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1374 | * use unspecified address as the source address |
1da177e4 LT |
1375 | * when a valid link-local address is not available. |
1376 | */ | |
d7aabf22 YH |
1377 | saddr = &in6addr_any; |
1378 | } else | |
1379 | saddr = &addr_buf; | |
1da177e4 | 1380 | |
2576f17d | 1381 | ip6_mc_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0); |
1da177e4 LT |
1382 | |
1383 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1384 | ||
27a884dc | 1385 | skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data); |
d10ba34b ACM |
1386 | skb_put(skb, sizeof(*pmr)); |
1387 | pmr = (struct mld2_report *)skb_transport_header(skb); | |
6e7cb837 YH |
1388 | pmr->mld2r_type = ICMPV6_MLD2_REPORT; |
1389 | pmr->mld2r_resv1 = 0; | |
1390 | pmr->mld2r_cksum = 0; | |
1391 | pmr->mld2r_resv2 = 0; | |
1392 | pmr->mld2r_ngrec = 0; | |
1da177e4 LT |
1393 | return skb; |
1394 | } | |
1395 | ||
1396 | static void mld_sendpack(struct sk_buff *skb) | |
1397 | { | |
0660e03f | 1398 | struct ipv6hdr *pip6 = ipv6_hdr(skb); |
9c70220b ACM |
1399 | struct mld2_report *pmr = |
1400 | (struct mld2_report *)skb_transport_header(skb); | |
1da177e4 | 1401 | int payload_len, mldlen; |
96b52e61 | 1402 | struct inet6_dev *idev; |
c346dca1 | 1403 | struct net *net = dev_net(skb->dev); |
1da177e4 | 1404 | int err; |
4c9483b2 | 1405 | struct flowi6 fl6; |
adf30907 | 1406 | struct dst_entry *dst; |
1da177e4 | 1407 | |
96b52e61 ED |
1408 | rcu_read_lock(); |
1409 | idev = __in6_dev_get(skb->dev); | |
edf391ff NH |
1410 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len); |
1411 | ||
27a884dc ACM |
1412 | payload_len = (skb->tail - skb->network_header) - sizeof(*pip6); |
1413 | mldlen = skb->tail - skb->transport_header; | |
1da177e4 LT |
1414 | pip6->payload_len = htons(payload_len); |
1415 | ||
6e7cb837 YH |
1416 | pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen, |
1417 | IPPROTO_ICMPV6, | |
1418 | csum_partial(skb_transport_header(skb), | |
1419 | mldlen, 0)); | |
41927178 | 1420 | |
4c9483b2 | 1421 | icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT, |
41927178 YH |
1422 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1423 | skb->dev->ifindex); | |
12fd84f4 | 1424 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
41927178 | 1425 | |
452edd59 DM |
1426 | err = 0; |
1427 | if (IS_ERR(dst)) { | |
1428 | err = PTR_ERR(dst); | |
1429 | dst = NULL; | |
1430 | } | |
adf30907 | 1431 | skb_dst_set(skb, dst); |
41927178 YH |
1432 | if (err) |
1433 | goto err_out; | |
1434 | ||
edf391ff NH |
1435 | payload_len = skb->len; |
1436 | ||
b2e0b385 | 1437 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
41927178 YH |
1438 | dst_output); |
1439 | out: | |
1da177e4 | 1440 | if (!err) { |
5a57d4c7 | 1441 | ICMP6MSGOUT_INC_STATS_BH(net, idev, ICMPV6_MLD2_REPORT); |
e41b5368 | 1442 | ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS); |
edf391ff | 1443 | IP6_UPD_PO_STATS_BH(net, idev, IPSTATS_MIB_OUTMCAST, payload_len); |
1da177e4 | 1444 | } else |
483a47d2 | 1445 | IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 | 1446 | |
96b52e61 | 1447 | rcu_read_unlock(); |
41927178 YH |
1448 | return; |
1449 | ||
1450 | err_out: | |
1451 | kfree_skb(skb); | |
1452 | goto out; | |
1da177e4 LT |
1453 | } |
1454 | ||
1455 | static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel) | |
1456 | { | |
fab10fe3 | 1457 | return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel); |
1da177e4 LT |
1458 | } |
1459 | ||
1460 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1461 | int type, struct mld2_grec **ppgr) | |
1462 | { | |
1463 | struct net_device *dev = pmc->idev->dev; | |
1464 | struct mld2_report *pmr; | |
1465 | struct mld2_grec *pgr; | |
1466 | ||
1467 | if (!skb) | |
1468 | skb = mld_newpack(dev, dev->mtu); | |
1469 | if (!skb) | |
1470 | return NULL; | |
1471 | pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec)); | |
1472 | pgr->grec_type = type; | |
1473 | pgr->grec_auxwords = 0; | |
1474 | pgr->grec_nsrcs = 0; | |
1475 | pgr->grec_mca = pmc->mca_addr; /* structure copy */ | |
9c70220b | 1476 | pmr = (struct mld2_report *)skb_transport_header(skb); |
6e7cb837 | 1477 | pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1); |
1da177e4 LT |
1478 | *ppgr = pgr; |
1479 | return skb; | |
1480 | } | |
1481 | ||
1482 | #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \ | |
1483 | skb_tailroom(skb)) : 0) | |
1484 | ||
1485 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1486 | int type, int gdeleted, int sdeleted) | |
1487 | { | |
1488 | struct net_device *dev = pmc->idev->dev; | |
1489 | struct mld2_report *pmr; | |
1490 | struct mld2_grec *pgr = NULL; | |
1491 | struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list; | |
5ab4a6c8 | 1492 | int scount, stotal, first, isquery, truncate; |
1da177e4 LT |
1493 | |
1494 | if (pmc->mca_flags & MAF_NOREPORT) | |
1495 | return skb; | |
1496 | ||
1497 | isquery = type == MLD2_MODE_IS_INCLUDE || | |
1498 | type == MLD2_MODE_IS_EXCLUDE; | |
1499 | truncate = type == MLD2_MODE_IS_EXCLUDE || | |
1500 | type == MLD2_CHANGE_TO_EXCLUDE; | |
1501 | ||
5ab4a6c8 DS |
1502 | stotal = scount = 0; |
1503 | ||
1da177e4 LT |
1504 | psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources; |
1505 | ||
5ab4a6c8 DS |
1506 | if (!*psf_list) |
1507 | goto empty_source; | |
1508 | ||
9c70220b | 1509 | pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL; |
1da177e4 LT |
1510 | |
1511 | /* EX and TO_EX get a fresh packet, if needed */ | |
1512 | if (truncate) { | |
6e7cb837 | 1513 | if (pmr && pmr->mld2r_ngrec && |
1da177e4 LT |
1514 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { |
1515 | if (skb) | |
1516 | mld_sendpack(skb); | |
1517 | skb = mld_newpack(dev, dev->mtu); | |
1518 | } | |
1519 | } | |
1520 | first = 1; | |
1da177e4 LT |
1521 | psf_prev = NULL; |
1522 | for (psf=*psf_list; psf; psf=psf_next) { | |
1523 | struct in6_addr *psrc; | |
1524 | ||
1525 | psf_next = psf->sf_next; | |
1526 | ||
1527 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) { | |
1528 | psf_prev = psf; | |
1529 | continue; | |
1530 | } | |
1531 | ||
1532 | /* clear marks on query responses */ | |
1533 | if (isquery) | |
1534 | psf->sf_gsresp = 0; | |
1535 | ||
1536 | if (AVAILABLE(skb) < sizeof(*psrc) + | |
1537 | first*sizeof(struct mld2_grec)) { | |
1538 | if (truncate && !first) | |
1539 | break; /* truncate these */ | |
1540 | if (pgr) | |
1541 | pgr->grec_nsrcs = htons(scount); | |
1542 | if (skb) | |
1543 | mld_sendpack(skb); | |
1544 | skb = mld_newpack(dev, dev->mtu); | |
1545 | first = 1; | |
1546 | scount = 0; | |
1547 | } | |
1548 | if (first) { | |
1549 | skb = add_grhead(skb, pmc, type, &pgr); | |
1550 | first = 0; | |
1551 | } | |
cc63f70b AD |
1552 | if (!skb) |
1553 | return NULL; | |
1da177e4 LT |
1554 | psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc)); |
1555 | *psrc = psf->sf_addr; | |
5ab4a6c8 | 1556 | scount++; stotal++; |
1da177e4 LT |
1557 | if ((type == MLD2_ALLOW_NEW_SOURCES || |
1558 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) { | |
1559 | psf->sf_crcount--; | |
1560 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { | |
1561 | if (psf_prev) | |
1562 | psf_prev->sf_next = psf->sf_next; | |
1563 | else | |
1564 | *psf_list = psf->sf_next; | |
1565 | kfree(psf); | |
1566 | continue; | |
1567 | } | |
1568 | } | |
1569 | psf_prev = psf; | |
1570 | } | |
5ab4a6c8 DS |
1571 | |
1572 | empty_source: | |
1573 | if (!stotal) { | |
1574 | if (type == MLD2_ALLOW_NEW_SOURCES || | |
1575 | type == MLD2_BLOCK_OLD_SOURCES) | |
1576 | return skb; | |
1577 | if (pmc->mca_crcount || isquery) { | |
1578 | /* make sure we have room for group header */ | |
1579 | if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) { | |
1580 | mld_sendpack(skb); | |
1581 | skb = NULL; /* add_grhead will get a new one */ | |
1582 | } | |
1583 | skb = add_grhead(skb, pmc, type, &pgr); | |
1584 | } | |
1585 | } | |
1da177e4 LT |
1586 | if (pgr) |
1587 | pgr->grec_nsrcs = htons(scount); | |
1588 | ||
1589 | if (isquery) | |
1590 | pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */ | |
1591 | return skb; | |
1592 | } | |
1593 | ||
1594 | static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc) | |
1595 | { | |
1596 | struct sk_buff *skb = NULL; | |
1597 | int type; | |
1598 | ||
1599 | if (!pmc) { | |
1600 | read_lock_bh(&idev->lock); | |
1601 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1602 | if (pmc->mca_flags & MAF_NOREPORT) | |
1603 | continue; | |
1604 | spin_lock_bh(&pmc->mca_lock); | |
1605 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1606 | type = MLD2_MODE_IS_EXCLUDE; | |
1607 | else | |
1608 | type = MLD2_MODE_IS_INCLUDE; | |
1609 | skb = add_grec(skb, pmc, type, 0, 0); | |
1610 | spin_unlock_bh(&pmc->mca_lock); | |
1611 | } | |
1612 | read_unlock_bh(&idev->lock); | |
1613 | } else { | |
1614 | spin_lock_bh(&pmc->mca_lock); | |
1615 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1616 | type = MLD2_MODE_IS_EXCLUDE; | |
1617 | else | |
1618 | type = MLD2_MODE_IS_INCLUDE; | |
1619 | skb = add_grec(skb, pmc, type, 0, 0); | |
1620 | spin_unlock_bh(&pmc->mca_lock); | |
1621 | } | |
1622 | if (skb) | |
1623 | mld_sendpack(skb); | |
1624 | } | |
1625 | ||
1626 | /* | |
1627 | * remove zero-count source records from a source filter list | |
1628 | */ | |
1629 | static void mld_clear_zeros(struct ip6_sf_list **ppsf) | |
1630 | { | |
1631 | struct ip6_sf_list *psf_prev, *psf_next, *psf; | |
1632 | ||
1633 | psf_prev = NULL; | |
1634 | for (psf=*ppsf; psf; psf = psf_next) { | |
1635 | psf_next = psf->sf_next; | |
1636 | if (psf->sf_crcount == 0) { | |
1637 | if (psf_prev) | |
1638 | psf_prev->sf_next = psf->sf_next; | |
1639 | else | |
1640 | *ppsf = psf->sf_next; | |
1641 | kfree(psf); | |
1642 | } else | |
1643 | psf_prev = psf; | |
1644 | } | |
1645 | } | |
1646 | ||
1647 | static void mld_send_cr(struct inet6_dev *idev) | |
1648 | { | |
1649 | struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next; | |
1650 | struct sk_buff *skb = NULL; | |
1651 | int type, dtype; | |
1652 | ||
1653 | read_lock_bh(&idev->lock); | |
6457d26b | 1654 | spin_lock(&idev->mc_lock); |
1da177e4 LT |
1655 | |
1656 | /* deleted MCA's */ | |
1657 | pmc_prev = NULL; | |
1658 | for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) { | |
1659 | pmc_next = pmc->next; | |
1660 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
1661 | type = MLD2_BLOCK_OLD_SOURCES; | |
1662 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1663 | skb = add_grec(skb, pmc, type, 1, 0); | |
1664 | skb = add_grec(skb, pmc, dtype, 1, 1); | |
1665 | } | |
1666 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1667 | if (pmc->mca_sfmode == MCAST_EXCLUDE) { |
1668 | type = MLD2_CHANGE_TO_INCLUDE; | |
1669 | skb = add_grec(skb, pmc, type, 1, 0); | |
1670 | } | |
5ab4a6c8 | 1671 | pmc->mca_crcount--; |
1da177e4 LT |
1672 | if (pmc->mca_crcount == 0) { |
1673 | mld_clear_zeros(&pmc->mca_tomb); | |
1674 | mld_clear_zeros(&pmc->mca_sources); | |
1675 | } | |
1676 | } | |
1677 | if (pmc->mca_crcount == 0 && !pmc->mca_tomb && | |
1678 | !pmc->mca_sources) { | |
1679 | if (pmc_prev) | |
1680 | pmc_prev->next = pmc_next; | |
1681 | else | |
1682 | idev->mc_tomb = pmc_next; | |
1683 | in6_dev_put(pmc->idev); | |
1684 | kfree(pmc); | |
1685 | } else | |
1686 | pmc_prev = pmc; | |
1687 | } | |
6457d26b | 1688 | spin_unlock(&idev->mc_lock); |
1da177e4 LT |
1689 | |
1690 | /* change recs */ | |
1691 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1692 | spin_lock_bh(&pmc->mca_lock); | |
1693 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1694 | type = MLD2_BLOCK_OLD_SOURCES; | |
1695 | dtype = MLD2_ALLOW_NEW_SOURCES; | |
1696 | } else { | |
1697 | type = MLD2_ALLOW_NEW_SOURCES; | |
1698 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1699 | } | |
1700 | skb = add_grec(skb, pmc, type, 0, 0); | |
1701 | skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */ | |
1702 | ||
1703 | /* filter mode changes */ | |
1704 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1705 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
1706 | type = MLD2_CHANGE_TO_EXCLUDE; | |
1707 | else | |
1708 | type = MLD2_CHANGE_TO_INCLUDE; | |
1709 | skb = add_grec(skb, pmc, type, 0, 0); | |
5ab4a6c8 | 1710 | pmc->mca_crcount--; |
1da177e4 LT |
1711 | } |
1712 | spin_unlock_bh(&pmc->mca_lock); | |
1713 | } | |
1714 | read_unlock_bh(&idev->lock); | |
1715 | if (!skb) | |
1716 | return; | |
1717 | (void) mld_sendpack(skb); | |
1718 | } | |
1719 | ||
1720 | static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type) | |
1721 | { | |
c346dca1 | 1722 | struct net *net = dev_net(dev); |
b8ad0cbc | 1723 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 | 1724 | struct inet6_dev *idev; |
1ab1457c | 1725 | struct sk_buff *skb; |
6e7cb837 | 1726 | struct mld_msg *hdr; |
d7aabf22 | 1727 | const struct in6_addr *snd_addr, *saddr; |
1da177e4 | 1728 | struct in6_addr addr_buf; |
a7ae1992 HX |
1729 | int hlen = LL_RESERVED_SPACE(dev); |
1730 | int tlen = dev->needed_tailroom; | |
1da177e4 LT |
1731 | int err, len, payload_len, full_len; |
1732 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1733 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1734 | IPV6_TLV_PADN, 0 }; | |
4c9483b2 | 1735 | struct flowi6 fl6; |
adf30907 | 1736 | struct dst_entry *dst; |
1da177e4 | 1737 | |
f3ee4010 YH |
1738 | if (type == ICMPV6_MGM_REDUCTION) |
1739 | snd_addr = &in6addr_linklocal_allrouters; | |
1740 | else | |
1741 | snd_addr = addr; | |
1da177e4 LT |
1742 | |
1743 | len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); | |
1744 | payload_len = len + sizeof(ra); | |
1745 | full_len = sizeof(struct ipv6hdr) + payload_len; | |
1746 | ||
edf391ff NH |
1747 | rcu_read_lock(); |
1748 | IP6_UPD_PO_STATS(net, __in6_dev_get(dev), | |
1749 | IPSTATS_MIB_OUT, full_len); | |
1750 | rcu_read_unlock(); | |
1751 | ||
a7ae1992 | 1752 | skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err); |
1da177e4 LT |
1753 | |
1754 | if (skb == NULL) { | |
a11d206d | 1755 | rcu_read_lock(); |
3bd653c8 | 1756 | IP6_INC_STATS(net, __in6_dev_get(dev), |
a11d206d YH |
1757 | IPSTATS_MIB_OUTDISCARDS); |
1758 | rcu_read_unlock(); | |
1da177e4 LT |
1759 | return; |
1760 | } | |
1761 | ||
a7ae1992 | 1762 | skb_reserve(skb, hlen); |
1da177e4 | 1763 | |
95c385b4 | 1764 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1765 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1766 | * use unspecified address as the source address |
1da177e4 LT |
1767 | * when a valid link-local address is not available. |
1768 | */ | |
d7aabf22 YH |
1769 | saddr = &in6addr_any; |
1770 | } else | |
1771 | saddr = &addr_buf; | |
1da177e4 | 1772 | |
2576f17d | 1773 | ip6_mc_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len); |
1da177e4 LT |
1774 | |
1775 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1776 | ||
6e7cb837 YH |
1777 | hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg)); |
1778 | memset(hdr, 0, sizeof(struct mld_msg)); | |
1779 | hdr->mld_type = type; | |
4e3fd7a0 | 1780 | hdr->mld_mca = *addr; |
1da177e4 | 1781 | |
6e7cb837 YH |
1782 | hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len, |
1783 | IPPROTO_ICMPV6, | |
1784 | csum_partial(hdr, len, 0)); | |
1da177e4 | 1785 | |
96b52e61 ED |
1786 | rcu_read_lock(); |
1787 | idev = __in6_dev_get(skb->dev); | |
1da177e4 | 1788 | |
4c9483b2 | 1789 | icmpv6_flow_init(sk, &fl6, type, |
41927178 YH |
1790 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1791 | skb->dev->ifindex); | |
12fd84f4 | 1792 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
452edd59 DM |
1793 | if (IS_ERR(dst)) { |
1794 | err = PTR_ERR(dst); | |
41927178 | 1795 | goto err_out; |
452edd59 | 1796 | } |
41927178 | 1797 | |
adf30907 | 1798 | skb_dst_set(skb, dst); |
b2e0b385 | 1799 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
41927178 YH |
1800 | dst_output); |
1801 | out: | |
1da177e4 | 1802 | if (!err) { |
5c5d244b | 1803 | ICMP6MSGOUT_INC_STATS(net, idev, type); |
a862f6a6 | 1804 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); |
edf391ff | 1805 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len); |
1da177e4 | 1806 | } else |
3bd653c8 | 1807 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 | 1808 | |
96b52e61 | 1809 | rcu_read_unlock(); |
1da177e4 | 1810 | return; |
41927178 YH |
1811 | |
1812 | err_out: | |
1813 | kfree_skb(skb); | |
1814 | goto out; | |
1da177e4 LT |
1815 | } |
1816 | ||
1817 | static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode, | |
b71d1d42 | 1818 | const struct in6_addr *psfsrc) |
1da177e4 LT |
1819 | { |
1820 | struct ip6_sf_list *psf, *psf_prev; | |
1821 | int rv = 0; | |
1822 | ||
1823 | psf_prev = NULL; | |
1824 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1825 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) | |
1826 | break; | |
1827 | psf_prev = psf; | |
1828 | } | |
1829 | if (!psf || psf->sf_count[sfmode] == 0) { | |
1830 | /* source filter not found, or count wrong => bug */ | |
1831 | return -ESRCH; | |
1832 | } | |
1833 | psf->sf_count[sfmode]--; | |
1834 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { | |
1835 | struct inet6_dev *idev = pmc->idev; | |
1836 | ||
1837 | /* no more filters for this source */ | |
1838 | if (psf_prev) | |
1839 | psf_prev->sf_next = psf->sf_next; | |
1840 | else | |
1841 | pmc->mca_sources = psf->sf_next; | |
1842 | if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) && | |
1843 | !MLD_V1_SEEN(idev)) { | |
1844 | psf->sf_crcount = idev->mc_qrv; | |
1845 | psf->sf_next = pmc->mca_tomb; | |
1846 | pmc->mca_tomb = psf; | |
1847 | rv = 1; | |
1848 | } else | |
1849 | kfree(psf); | |
1850 | } | |
1851 | return rv; | |
1852 | } | |
1853 | ||
b71d1d42 ED |
1854 | static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
1855 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
1856 | int delta) |
1857 | { | |
1858 | struct ifmcaddr6 *pmc; | |
1859 | int changerec = 0; | |
1860 | int i, err; | |
1861 | ||
1862 | if (!idev) | |
1863 | return -ENODEV; | |
1864 | read_lock_bh(&idev->lock); | |
1865 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1866 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) | |
1867 | break; | |
1868 | } | |
1869 | if (!pmc) { | |
1870 | /* MCA not found?? bug */ | |
1871 | read_unlock_bh(&idev->lock); | |
1872 | return -ESRCH; | |
1873 | } | |
1874 | spin_lock_bh(&pmc->mca_lock); | |
1875 | sf_markstate(pmc); | |
1876 | if (!delta) { | |
1877 | if (!pmc->mca_sfcount[sfmode]) { | |
1878 | spin_unlock_bh(&pmc->mca_lock); | |
1879 | read_unlock_bh(&idev->lock); | |
1880 | return -EINVAL; | |
1881 | } | |
1882 | pmc->mca_sfcount[sfmode]--; | |
1883 | } | |
1884 | err = 0; | |
1885 | for (i=0; i<sfcount; i++) { | |
1886 | int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); | |
1887 | ||
1888 | changerec |= rv > 0; | |
1889 | if (!err && rv < 0) | |
1890 | err = rv; | |
1891 | } | |
1892 | if (pmc->mca_sfmode == MCAST_EXCLUDE && | |
1893 | pmc->mca_sfcount[MCAST_EXCLUDE] == 0 && | |
1894 | pmc->mca_sfcount[MCAST_INCLUDE]) { | |
1895 | struct ip6_sf_list *psf; | |
1896 | ||
1897 | /* filter mode change */ | |
1898 | pmc->mca_sfmode = MCAST_INCLUDE; | |
1899 | pmc->mca_crcount = idev->mc_qrv; | |
1900 | idev->mc_ifc_count = pmc->mca_crcount; | |
1901 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) | |
1902 | psf->sf_crcount = 0; | |
1903 | mld_ifc_event(pmc->idev); | |
1904 | } else if (sf_setstate(pmc) || changerec) | |
1905 | mld_ifc_event(pmc->idev); | |
1906 | spin_unlock_bh(&pmc->mca_lock); | |
1907 | read_unlock_bh(&idev->lock); | |
1908 | return err; | |
1909 | } | |
1910 | ||
1911 | /* | |
1912 | * Add multicast single-source filter to the interface list | |
1913 | */ | |
1914 | static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode, | |
99d2f47a | 1915 | const struct in6_addr *psfsrc) |
1da177e4 LT |
1916 | { |
1917 | struct ip6_sf_list *psf, *psf_prev; | |
1918 | ||
1919 | psf_prev = NULL; | |
1920 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1921 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) | |
1922 | break; | |
1923 | psf_prev = psf; | |
1924 | } | |
1925 | if (!psf) { | |
0c600eda | 1926 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
1da177e4 LT |
1927 | if (!psf) |
1928 | return -ENOBUFS; | |
0c600eda | 1929 | |
1da177e4 LT |
1930 | psf->sf_addr = *psfsrc; |
1931 | if (psf_prev) { | |
1932 | psf_prev->sf_next = psf; | |
1933 | } else | |
1934 | pmc->mca_sources = psf; | |
1935 | } | |
1936 | psf->sf_count[sfmode]++; | |
1937 | return 0; | |
1938 | } | |
1939 | ||
1940 | static void sf_markstate(struct ifmcaddr6 *pmc) | |
1941 | { | |
1942 | struct ip6_sf_list *psf; | |
1943 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; | |
1944 | ||
1945 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) | |
1946 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1947 | psf->sf_oldin = mca_xcount == | |
1948 | psf->sf_count[MCAST_EXCLUDE] && | |
1949 | !psf->sf_count[MCAST_INCLUDE]; | |
1950 | } else | |
1951 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; | |
1952 | } | |
1953 | ||
1954 | static int sf_setstate(struct ifmcaddr6 *pmc) | |
1955 | { | |
7add2a43 | 1956 | struct ip6_sf_list *psf, *dpsf; |
1da177e4 LT |
1957 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
1958 | int qrv = pmc->idev->mc_qrv; | |
1959 | int new_in, rv; | |
1960 | ||
1961 | rv = 0; | |
1962 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1963 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1964 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && | |
1965 | !psf->sf_count[MCAST_INCLUDE]; | |
1966 | } else | |
1967 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; | |
7add2a43 DS |
1968 | if (new_in) { |
1969 | if (!psf->sf_oldin) { | |
e80e28b6 | 1970 | struct ip6_sf_list *prev = NULL; |
7add2a43 DS |
1971 | |
1972 | for (dpsf=pmc->mca_tomb; dpsf; | |
1973 | dpsf=dpsf->sf_next) { | |
1974 | if (ipv6_addr_equal(&dpsf->sf_addr, | |
1975 | &psf->sf_addr)) | |
1976 | break; | |
1977 | prev = dpsf; | |
1978 | } | |
1979 | if (dpsf) { | |
1980 | if (prev) | |
1981 | prev->sf_next = dpsf->sf_next; | |
1982 | else | |
1983 | pmc->mca_tomb = dpsf->sf_next; | |
1984 | kfree(dpsf); | |
1985 | } | |
1986 | psf->sf_crcount = qrv; | |
1987 | rv++; | |
1988 | } | |
1989 | } else if (psf->sf_oldin) { | |
1990 | psf->sf_crcount = 0; | |
1991 | /* | |
1992 | * add or update "delete" records if an active filter | |
1993 | * is now inactive | |
1994 | */ | |
1995 | for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next) | |
1996 | if (ipv6_addr_equal(&dpsf->sf_addr, | |
1997 | &psf->sf_addr)) | |
1998 | break; | |
1999 | if (!dpsf) { | |
5d55354f | 2000 | dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC); |
7add2a43 DS |
2001 | if (!dpsf) |
2002 | continue; | |
2003 | *dpsf = *psf; | |
2004 | /* pmc->mca_lock held by callers */ | |
2005 | dpsf->sf_next = pmc->mca_tomb; | |
2006 | pmc->mca_tomb = dpsf; | |
2007 | } | |
2008 | dpsf->sf_crcount = qrv; | |
1da177e4 LT |
2009 | rv++; |
2010 | } | |
2011 | } | |
2012 | return rv; | |
2013 | } | |
2014 | ||
2015 | /* | |
2016 | * Add multicast source filter list to the interface list | |
2017 | */ | |
b71d1d42 ED |
2018 | static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
2019 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
2020 | int delta) |
2021 | { | |
2022 | struct ifmcaddr6 *pmc; | |
2023 | int isexclude; | |
2024 | int i, err; | |
2025 | ||
2026 | if (!idev) | |
2027 | return -ENODEV; | |
2028 | read_lock_bh(&idev->lock); | |
2029 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
2030 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) | |
2031 | break; | |
2032 | } | |
2033 | if (!pmc) { | |
2034 | /* MCA not found?? bug */ | |
2035 | read_unlock_bh(&idev->lock); | |
2036 | return -ESRCH; | |
2037 | } | |
2038 | spin_lock_bh(&pmc->mca_lock); | |
2039 | ||
2040 | sf_markstate(pmc); | |
2041 | isexclude = pmc->mca_sfmode == MCAST_EXCLUDE; | |
2042 | if (!delta) | |
2043 | pmc->mca_sfcount[sfmode]++; | |
2044 | err = 0; | |
2045 | for (i=0; i<sfcount; i++) { | |
99d2f47a | 2046 | err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]); |
1da177e4 LT |
2047 | if (err) |
2048 | break; | |
2049 | } | |
2050 | if (err) { | |
2051 | int j; | |
2052 | ||
2053 | if (!delta) | |
2054 | pmc->mca_sfcount[sfmode]--; | |
2055 | for (j=0; j<i; j++) | |
78d50217 | 2056 | ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]); |
1da177e4 | 2057 | } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) { |
1da177e4 LT |
2058 | struct ip6_sf_list *psf; |
2059 | ||
2060 | /* filter mode change */ | |
2061 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2062 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
2063 | else if (pmc->mca_sfcount[MCAST_INCLUDE]) | |
2064 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2065 | /* else no filters; keep old mode for reports */ | |
2066 | ||
2067 | pmc->mca_crcount = idev->mc_qrv; | |
2068 | idev->mc_ifc_count = pmc->mca_crcount; | |
2069 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) | |
2070 | psf->sf_crcount = 0; | |
2071 | mld_ifc_event(idev); | |
2072 | } else if (sf_setstate(pmc)) | |
2073 | mld_ifc_event(idev); | |
2074 | spin_unlock_bh(&pmc->mca_lock); | |
2075 | read_unlock_bh(&idev->lock); | |
2076 | return err; | |
2077 | } | |
2078 | ||
2079 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc) | |
2080 | { | |
2081 | struct ip6_sf_list *psf, *nextpsf; | |
2082 | ||
2083 | for (psf=pmc->mca_tomb; psf; psf=nextpsf) { | |
2084 | nextpsf = psf->sf_next; | |
2085 | kfree(psf); | |
2086 | } | |
2087 | pmc->mca_tomb = NULL; | |
2088 | for (psf=pmc->mca_sources; psf; psf=nextpsf) { | |
2089 | nextpsf = psf->sf_next; | |
2090 | kfree(psf); | |
2091 | } | |
2092 | pmc->mca_sources = NULL; | |
2093 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
de9daad9 | 2094 | pmc->mca_sfcount[MCAST_INCLUDE] = 0; |
1da177e4 LT |
2095 | pmc->mca_sfcount[MCAST_EXCLUDE] = 1; |
2096 | } | |
2097 | ||
2098 | ||
2099 | static void igmp6_join_group(struct ifmcaddr6 *ma) | |
2100 | { | |
2101 | unsigned long delay; | |
2102 | ||
2103 | if (ma->mca_flags & MAF_NOREPORT) | |
2104 | return; | |
2105 | ||
2106 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2107 | ||
2108 | delay = net_random() % IGMP6_UNSOLICITED_IVAL; | |
2109 | ||
2110 | spin_lock_bh(&ma->mca_lock); | |
2111 | if (del_timer(&ma->mca_timer)) { | |
2112 | atomic_dec(&ma->mca_refcnt); | |
2113 | delay = ma->mca_timer.expires - jiffies; | |
2114 | } | |
2115 | ||
2116 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
2117 | atomic_inc(&ma->mca_refcnt); | |
2118 | ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER; | |
2119 | spin_unlock_bh(&ma->mca_lock); | |
2120 | } | |
2121 | ||
2122 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
2123 | struct inet6_dev *idev) | |
2124 | { | |
2125 | int err; | |
2126 | ||
5ab4a6c8 DS |
2127 | /* callers have the socket lock and a write lock on ipv6_sk_mc_lock, |
2128 | * so no other readers or writers of iml or its sflist | |
2129 | */ | |
cfcabdcc | 2130 | if (!iml->sflist) { |
1da177e4 LT |
2131 | /* any-source empty exclude case */ |
2132 | return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0); | |
2133 | } | |
2134 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, | |
2135 | iml->sflist->sl_count, iml->sflist->sl_addr, 0); | |
2136 | sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max)); | |
2137 | iml->sflist = NULL; | |
2138 | return err; | |
2139 | } | |
2140 | ||
2141 | static void igmp6_leave_group(struct ifmcaddr6 *ma) | |
2142 | { | |
2143 | if (MLD_V1_SEEN(ma->idev)) { | |
2144 | if (ma->mca_flags & MAF_LAST_REPORTER) | |
2145 | igmp6_send(&ma->mca_addr, ma->idev->dev, | |
2146 | ICMPV6_MGM_REDUCTION); | |
2147 | } else { | |
2148 | mld_add_delrec(ma->idev, ma); | |
2149 | mld_ifc_event(ma->idev); | |
2150 | } | |
2151 | } | |
2152 | ||
2153 | static void mld_gq_timer_expire(unsigned long data) | |
2154 | { | |
2155 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2156 | ||
2157 | idev->mc_gq_running = 0; | |
2158 | mld_send_report(idev, NULL); | |
2159 | __in6_dev_put(idev); | |
2160 | } | |
2161 | ||
2162 | static void mld_ifc_timer_expire(unsigned long data) | |
2163 | { | |
2164 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2165 | ||
2166 | mld_send_cr(idev); | |
2167 | if (idev->mc_ifc_count) { | |
2168 | idev->mc_ifc_count--; | |
2169 | if (idev->mc_ifc_count) | |
2170 | mld_ifc_start_timer(idev, idev->mc_maxdelay); | |
2171 | } | |
2172 | __in6_dev_put(idev); | |
2173 | } | |
2174 | ||
2175 | static void mld_ifc_event(struct inet6_dev *idev) | |
2176 | { | |
2177 | if (MLD_V1_SEEN(idev)) | |
2178 | return; | |
2179 | idev->mc_ifc_count = idev->mc_qrv; | |
2180 | mld_ifc_start_timer(idev, 1); | |
2181 | } | |
2182 | ||
2183 | ||
2184 | static void igmp6_timer_handler(unsigned long data) | |
2185 | { | |
2186 | struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data; | |
2187 | ||
2188 | if (MLD_V1_SEEN(ma->idev)) | |
2189 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2190 | else | |
2191 | mld_send_report(ma->idev, ma); | |
2192 | ||
2193 | spin_lock(&ma->mca_lock); | |
2194 | ma->mca_flags |= MAF_LAST_REPORTER; | |
2195 | ma->mca_flags &= ~MAF_TIMER_RUNNING; | |
2196 | spin_unlock(&ma->mca_lock); | |
2197 | ma_put(ma); | |
2198 | } | |
2199 | ||
75c78500 MS |
2200 | /* Device changing type */ |
2201 | ||
2202 | void ipv6_mc_unmap(struct inet6_dev *idev) | |
2203 | { | |
2204 | struct ifmcaddr6 *i; | |
2205 | ||
2206 | /* Install multicast list, except for all-nodes (already installed) */ | |
2207 | ||
2208 | read_lock_bh(&idev->lock); | |
2209 | for (i = idev->mc_list; i; i = i->next) | |
2210 | igmp6_group_dropped(i); | |
2211 | read_unlock_bh(&idev->lock); | |
2212 | } | |
2213 | ||
2214 | void ipv6_mc_remap(struct inet6_dev *idev) | |
2215 | { | |
2216 | ipv6_mc_up(idev); | |
2217 | } | |
2218 | ||
1da177e4 LT |
2219 | /* Device going down */ |
2220 | ||
2221 | void ipv6_mc_down(struct inet6_dev *idev) | |
2222 | { | |
2223 | struct ifmcaddr6 *i; | |
2224 | ||
2225 | /* Withdraw multicast list */ | |
2226 | ||
2227 | read_lock_bh(&idev->lock); | |
2228 | idev->mc_ifc_count = 0; | |
2229 | if (del_timer(&idev->mc_ifc_timer)) | |
2230 | __in6_dev_put(idev); | |
2231 | idev->mc_gq_running = 0; | |
2232 | if (del_timer(&idev->mc_gq_timer)) | |
2233 | __in6_dev_put(idev); | |
2234 | ||
2235 | for (i = idev->mc_list; i; i=i->next) | |
2236 | igmp6_group_dropped(i); | |
2237 | read_unlock_bh(&idev->lock); | |
2238 | ||
2239 | mld_clear_delrec(idev); | |
2240 | } | |
2241 | ||
2242 | ||
2243 | /* Device going up */ | |
2244 | ||
2245 | void ipv6_mc_up(struct inet6_dev *idev) | |
2246 | { | |
2247 | struct ifmcaddr6 *i; | |
2248 | ||
2249 | /* Install multicast list, except for all-nodes (already installed) */ | |
2250 | ||
2251 | read_lock_bh(&idev->lock); | |
2252 | for (i = idev->mc_list; i; i=i->next) | |
2253 | igmp6_group_added(i); | |
2254 | read_unlock_bh(&idev->lock); | |
2255 | } | |
2256 | ||
2257 | /* IPv6 device initialization. */ | |
2258 | ||
2259 | void ipv6_mc_init_dev(struct inet6_dev *idev) | |
2260 | { | |
1da177e4 | 2261 | write_lock_bh(&idev->lock); |
6457d26b | 2262 | spin_lock_init(&idev->mc_lock); |
1da177e4 | 2263 | idev->mc_gq_running = 0; |
b24b8a24 PE |
2264 | setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire, |
2265 | (unsigned long)idev); | |
1da177e4 LT |
2266 | idev->mc_tomb = NULL; |
2267 | idev->mc_ifc_count = 0; | |
b24b8a24 PE |
2268 | setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire, |
2269 | (unsigned long)idev); | |
1da177e4 LT |
2270 | idev->mc_qrv = MLD_QRV_DEFAULT; |
2271 | idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL; | |
2272 | idev->mc_v1_seen = 0; | |
2273 | write_unlock_bh(&idev->lock); | |
1da177e4 LT |
2274 | } |
2275 | ||
2276 | /* | |
2277 | * Device is about to be destroyed: clean up. | |
2278 | */ | |
2279 | ||
2280 | void ipv6_mc_destroy_dev(struct inet6_dev *idev) | |
2281 | { | |
2282 | struct ifmcaddr6 *i; | |
1da177e4 LT |
2283 | |
2284 | /* Deactivate timers */ | |
2285 | ipv6_mc_down(idev); | |
2286 | ||
2287 | /* Delete all-nodes address. */ | |
1da177e4 LT |
2288 | /* We cannot call ipv6_dev_mc_dec() directly, our caller in |
2289 | * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will | |
2290 | * fail. | |
2291 | */ | |
f3ee4010 | 2292 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes); |
1da177e4 | 2293 | |
f3ee4010 YH |
2294 | if (idev->cnf.forwarding) |
2295 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters); | |
1da177e4 LT |
2296 | |
2297 | write_lock_bh(&idev->lock); | |
2298 | while ((i = idev->mc_list) != NULL) { | |
2299 | idev->mc_list = i->next; | |
2300 | write_unlock_bh(&idev->lock); | |
2301 | ||
2302 | igmp6_group_dropped(i); | |
2303 | ma_put(i); | |
2304 | ||
2305 | write_lock_bh(&idev->lock); | |
2306 | } | |
2307 | write_unlock_bh(&idev->lock); | |
2308 | } | |
2309 | ||
2310 | #ifdef CONFIG_PROC_FS | |
2311 | struct igmp6_mc_iter_state { | |
b8ad0cbc | 2312 | struct seq_net_private p; |
1da177e4 LT |
2313 | struct net_device *dev; |
2314 | struct inet6_dev *idev; | |
2315 | }; | |
2316 | ||
2317 | #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private) | |
2318 | ||
2319 | static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq) | |
2320 | { | |
2321 | struct ifmcaddr6 *im = NULL; | |
2322 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
1218854a | 2323 | struct net *net = seq_file_net(seq); |
1da177e4 | 2324 | |
7562f876 | 2325 | state->idev = NULL; |
ce81b76a | 2326 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2327 | struct inet6_dev *idev; |
ce81b76a | 2328 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2329 | if (!idev) |
2330 | continue; | |
2331 | read_lock_bh(&idev->lock); | |
2332 | im = idev->mc_list; | |
2333 | if (im) { | |
2334 | state->idev = idev; | |
2335 | break; | |
2336 | } | |
2337 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2338 | } |
2339 | return im; | |
2340 | } | |
2341 | ||
2342 | static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im) | |
2343 | { | |
2344 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2345 | ||
2346 | im = im->next; | |
2347 | while (!im) { | |
ce81b76a | 2348 | if (likely(state->idev != NULL)) |
1da177e4 | 2349 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2350 | |
2351 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2352 | if (!state->dev) { |
2353 | state->idev = NULL; | |
2354 | break; | |
2355 | } | |
ce81b76a | 2356 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2357 | if (!state->idev) |
2358 | continue; | |
2359 | read_lock_bh(&state->idev->lock); | |
2360 | im = state->idev->mc_list; | |
2361 | } | |
2362 | return im; | |
2363 | } | |
2364 | ||
2365 | static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos) | |
2366 | { | |
2367 | struct ifmcaddr6 *im = igmp6_mc_get_first(seq); | |
2368 | if (im) | |
2369 | while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL) | |
2370 | --pos; | |
2371 | return pos ? NULL : im; | |
2372 | } | |
2373 | ||
2374 | static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2375 | __acquires(RCU) |
1da177e4 | 2376 | { |
ce81b76a | 2377 | rcu_read_lock(); |
1da177e4 LT |
2378 | return igmp6_mc_get_idx(seq, *pos); |
2379 | } | |
2380 | ||
2381 | static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2382 | { | |
ce81b76a ED |
2383 | struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v); |
2384 | ||
1da177e4 LT |
2385 | ++*pos; |
2386 | return im; | |
2387 | } | |
2388 | ||
2389 | static void igmp6_mc_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2390 | __releases(RCU) |
1da177e4 LT |
2391 | { |
2392 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
ce81b76a | 2393 | |
1da177e4 LT |
2394 | if (likely(state->idev != NULL)) { |
2395 | read_unlock_bh(&state->idev->lock); | |
1da177e4 LT |
2396 | state->idev = NULL; |
2397 | } | |
2398 | state->dev = NULL; | |
ce81b76a | 2399 | rcu_read_unlock(); |
1da177e4 LT |
2400 | } |
2401 | ||
2402 | static int igmp6_mc_seq_show(struct seq_file *seq, void *v) | |
2403 | { | |
2404 | struct ifmcaddr6 *im = (struct ifmcaddr6 *)v; | |
2405 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2406 | ||
2407 | seq_printf(seq, | |
4b7a4274 | 2408 | "%-4d %-15s %pi6 %5d %08X %ld\n", |
1da177e4 | 2409 | state->dev->ifindex, state->dev->name, |
b071195d | 2410 | &im->mca_addr, |
1da177e4 LT |
2411 | im->mca_users, im->mca_flags, |
2412 | (im->mca_flags&MAF_TIMER_RUNNING) ? | |
2413 | jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0); | |
2414 | return 0; | |
2415 | } | |
2416 | ||
56b3d975 | 2417 | static const struct seq_operations igmp6_mc_seq_ops = { |
1da177e4 LT |
2418 | .start = igmp6_mc_seq_start, |
2419 | .next = igmp6_mc_seq_next, | |
2420 | .stop = igmp6_mc_seq_stop, | |
2421 | .show = igmp6_mc_seq_show, | |
2422 | }; | |
2423 | ||
2424 | static int igmp6_mc_seq_open(struct inode *inode, struct file *file) | |
2425 | { | |
b8ad0cbc DL |
2426 | return seq_open_net(inode, file, &igmp6_mc_seq_ops, |
2427 | sizeof(struct igmp6_mc_iter_state)); | |
1da177e4 LT |
2428 | } |
2429 | ||
9a32144e | 2430 | static const struct file_operations igmp6_mc_seq_fops = { |
1da177e4 LT |
2431 | .owner = THIS_MODULE, |
2432 | .open = igmp6_mc_seq_open, | |
2433 | .read = seq_read, | |
2434 | .llseek = seq_lseek, | |
b8ad0cbc | 2435 | .release = seq_release_net, |
1da177e4 LT |
2436 | }; |
2437 | ||
2438 | struct igmp6_mcf_iter_state { | |
b8ad0cbc | 2439 | struct seq_net_private p; |
1da177e4 LT |
2440 | struct net_device *dev; |
2441 | struct inet6_dev *idev; | |
2442 | struct ifmcaddr6 *im; | |
2443 | }; | |
2444 | ||
2445 | #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private) | |
2446 | ||
2447 | static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq) | |
2448 | { | |
2449 | struct ip6_sf_list *psf = NULL; | |
2450 | struct ifmcaddr6 *im = NULL; | |
2451 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
1218854a | 2452 | struct net *net = seq_file_net(seq); |
1da177e4 | 2453 | |
7562f876 PE |
2454 | state->idev = NULL; |
2455 | state->im = NULL; | |
ce81b76a | 2456 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2457 | struct inet6_dev *idev; |
ce81b76a | 2458 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2459 | if (unlikely(idev == NULL)) |
2460 | continue; | |
2461 | read_lock_bh(&idev->lock); | |
2462 | im = idev->mc_list; | |
2463 | if (likely(im != NULL)) { | |
2464 | spin_lock_bh(&im->mca_lock); | |
2465 | psf = im->mca_sources; | |
2466 | if (likely(psf != NULL)) { | |
2467 | state->im = im; | |
2468 | state->idev = idev; | |
2469 | break; | |
2470 | } | |
2471 | spin_unlock_bh(&im->mca_lock); | |
2472 | } | |
2473 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2474 | } |
2475 | return psf; | |
2476 | } | |
2477 | ||
2478 | static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf) | |
2479 | { | |
2480 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2481 | ||
2482 | psf = psf->sf_next; | |
2483 | while (!psf) { | |
2484 | spin_unlock_bh(&state->im->mca_lock); | |
2485 | state->im = state->im->next; | |
2486 | while (!state->im) { | |
ce81b76a | 2487 | if (likely(state->idev != NULL)) |
1da177e4 | 2488 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2489 | |
2490 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2491 | if (!state->dev) { |
2492 | state->idev = NULL; | |
2493 | goto out; | |
2494 | } | |
ce81b76a | 2495 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2496 | if (!state->idev) |
2497 | continue; | |
2498 | read_lock_bh(&state->idev->lock); | |
2499 | state->im = state->idev->mc_list; | |
2500 | } | |
2501 | if (!state->im) | |
2502 | break; | |
2503 | spin_lock_bh(&state->im->mca_lock); | |
2504 | psf = state->im->mca_sources; | |
2505 | } | |
2506 | out: | |
2507 | return psf; | |
2508 | } | |
2509 | ||
2510 | static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos) | |
2511 | { | |
2512 | struct ip6_sf_list *psf = igmp6_mcf_get_first(seq); | |
2513 | if (psf) | |
2514 | while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL) | |
2515 | --pos; | |
2516 | return pos ? NULL : psf; | |
2517 | } | |
2518 | ||
2519 | static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2520 | __acquires(RCU) |
1da177e4 | 2521 | { |
ce81b76a | 2522 | rcu_read_lock(); |
1da177e4 LT |
2523 | return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
2524 | } | |
2525 | ||
2526 | static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2527 | { | |
2528 | struct ip6_sf_list *psf; | |
2529 | if (v == SEQ_START_TOKEN) | |
2530 | psf = igmp6_mcf_get_first(seq); | |
2531 | else | |
2532 | psf = igmp6_mcf_get_next(seq, v); | |
2533 | ++*pos; | |
2534 | return psf; | |
2535 | } | |
2536 | ||
2537 | static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2538 | __releases(RCU) |
1da177e4 LT |
2539 | { |
2540 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2541 | if (likely(state->im != NULL)) { | |
2542 | spin_unlock_bh(&state->im->mca_lock); | |
2543 | state->im = NULL; | |
2544 | } | |
2545 | if (likely(state->idev != NULL)) { | |
2546 | read_unlock_bh(&state->idev->lock); | |
1da177e4 LT |
2547 | state->idev = NULL; |
2548 | } | |
2549 | state->dev = NULL; | |
ce81b76a | 2550 | rcu_read_unlock(); |
1da177e4 LT |
2551 | } |
2552 | ||
2553 | static int igmp6_mcf_seq_show(struct seq_file *seq, void *v) | |
2554 | { | |
2555 | struct ip6_sf_list *psf = (struct ip6_sf_list *)v; | |
2556 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2557 | ||
2558 | if (v == SEQ_START_TOKEN) { | |
1ab1457c | 2559 | seq_printf(seq, |
1da177e4 | 2560 | "%3s %6s " |
9343e79a | 2561 | "%32s %32s %6s %6s\n", "Idx", |
1da177e4 LT |
2562 | "Device", "Multicast Address", |
2563 | "Source Address", "INC", "EXC"); | |
2564 | } else { | |
2565 | seq_printf(seq, | |
4b7a4274 | 2566 | "%3d %6.6s %pi6 %pi6 %6lu %6lu\n", |
1da177e4 | 2567 | state->dev->ifindex, state->dev->name, |
b071195d HH |
2568 | &state->im->mca_addr, |
2569 | &psf->sf_addr, | |
1da177e4 LT |
2570 | psf->sf_count[MCAST_INCLUDE], |
2571 | psf->sf_count[MCAST_EXCLUDE]); | |
2572 | } | |
2573 | return 0; | |
2574 | } | |
2575 | ||
56b3d975 | 2576 | static const struct seq_operations igmp6_mcf_seq_ops = { |
1da177e4 LT |
2577 | .start = igmp6_mcf_seq_start, |
2578 | .next = igmp6_mcf_seq_next, | |
2579 | .stop = igmp6_mcf_seq_stop, | |
2580 | .show = igmp6_mcf_seq_show, | |
2581 | }; | |
2582 | ||
2583 | static int igmp6_mcf_seq_open(struct inode *inode, struct file *file) | |
2584 | { | |
b8ad0cbc DL |
2585 | return seq_open_net(inode, file, &igmp6_mcf_seq_ops, |
2586 | sizeof(struct igmp6_mcf_iter_state)); | |
1da177e4 LT |
2587 | } |
2588 | ||
9a32144e | 2589 | static const struct file_operations igmp6_mcf_seq_fops = { |
1da177e4 LT |
2590 | .owner = THIS_MODULE, |
2591 | .open = igmp6_mcf_seq_open, | |
2592 | .read = seq_read, | |
2593 | .llseek = seq_lseek, | |
b8ad0cbc | 2594 | .release = seq_release_net, |
1da177e4 | 2595 | }; |
ea82edf7 | 2596 | |
2c8c1e72 | 2597 | static int __net_init igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2598 | { |
2599 | int err; | |
2600 | ||
2601 | err = -ENOMEM; | |
d4beaa66 | 2602 | if (!proc_create("igmp6", S_IRUGO, net->proc_net, &igmp6_mc_seq_fops)) |
ea82edf7 | 2603 | goto out; |
d4beaa66 G |
2604 | if (!proc_create("mcfilter6", S_IRUGO, net->proc_net, |
2605 | &igmp6_mcf_seq_fops)) | |
ea82edf7 DL |
2606 | goto out_proc_net_igmp6; |
2607 | ||
2608 | err = 0; | |
2609 | out: | |
2610 | return err; | |
2611 | ||
2612 | out_proc_net_igmp6: | |
ece31ffd | 2613 | remove_proc_entry("igmp6", net->proc_net); |
ea82edf7 DL |
2614 | goto out; |
2615 | } | |
2616 | ||
2c8c1e72 | 2617 | static void __net_exit igmp6_proc_exit(struct net *net) |
ea82edf7 | 2618 | { |
ece31ffd G |
2619 | remove_proc_entry("mcfilter6", net->proc_net); |
2620 | remove_proc_entry("igmp6", net->proc_net); | |
ea82edf7 DL |
2621 | } |
2622 | #else | |
2c8c1e72 | 2623 | static inline int igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2624 | { |
2625 | return 0; | |
2626 | } | |
2c8c1e72 | 2627 | static inline void igmp6_proc_exit(struct net *net) |
ea82edf7 | 2628 | { |
ea82edf7 | 2629 | } |
1da177e4 LT |
2630 | #endif |
2631 | ||
2c8c1e72 | 2632 | static int __net_init igmp6_net_init(struct net *net) |
1da177e4 | 2633 | { |
1da177e4 LT |
2634 | int err; |
2635 | ||
1ed8516f DL |
2636 | err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6, |
2637 | SOCK_RAW, IPPROTO_ICMPV6, net); | |
1da177e4 | 2638 | if (err < 0) { |
f3213831 | 2639 | pr_err("Failed to initialize the IGMP6 control socket (err %d)\n", |
1da177e4 | 2640 | err); |
b8ad0cbc | 2641 | goto out; |
1da177e4 LT |
2642 | } |
2643 | ||
1ed8516f | 2644 | inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1; |
1da177e4 | 2645 | |
ea82edf7 DL |
2646 | err = igmp6_proc_init(net); |
2647 | if (err) | |
b8ad0cbc | 2648 | goto out_sock_create; |
b8ad0cbc DL |
2649 | out: |
2650 | return err; | |
2651 | ||
2652 | out_sock_create: | |
1ed8516f | 2653 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
b8ad0cbc | 2654 | goto out; |
1da177e4 LT |
2655 | } |
2656 | ||
2c8c1e72 | 2657 | static void __net_exit igmp6_net_exit(struct net *net) |
1da177e4 | 2658 | { |
1ed8516f | 2659 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
ea82edf7 | 2660 | igmp6_proc_exit(net); |
1da177e4 | 2661 | } |
b8ad0cbc DL |
2662 | |
2663 | static struct pernet_operations igmp6_net_ops = { | |
2664 | .init = igmp6_net_init, | |
2665 | .exit = igmp6_net_exit, | |
2666 | }; | |
2667 | ||
2668 | int __init igmp6_init(void) | |
2669 | { | |
2670 | return register_pernet_subsys(&igmp6_net_ops); | |
2671 | } | |
2672 | ||
2673 | void igmp6_cleanup(void) | |
2674 | { | |
2675 | unregister_pernet_subsys(&igmp6_net_ops); | |
2676 | } |