Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Multicast support for IPv6 | |
1ab1457c | 3 | * Linux INET6 implementation |
1da177e4 LT |
4 | * |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 | 7 | * |
1ab1457c | 8 | * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c |
1da177e4 LT |
9 | * |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | ||
16 | /* Changes: | |
17 | * | |
18 | * yoshfuji : fix format of router-alert option | |
19 | * YOSHIFUJI Hideaki @USAGI: | |
20 | * Fixed source address for MLD message based on | |
21 | * <draft-ietf-magma-mld-source-05.txt>. | |
22 | * YOSHIFUJI Hideaki @USAGI: | |
23 | * - Ignore Queries for invalid addresses. | |
24 | * - MLD for link-local addresses. | |
25 | * David L Stevens <dlstevens@us.ibm.com>: | |
26 | * - MLDv2 support | |
27 | */ | |
28 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/errno.h> | |
31 | #include <linux/types.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/socket.h> | |
34 | #include <linux/sockios.h> | |
35 | #include <linux/jiffies.h> | |
36 | #include <linux/times.h> | |
37 | #include <linux/net.h> | |
38 | #include <linux/in.h> | |
39 | #include <linux/in6.h> | |
40 | #include <linux/netdevice.h> | |
41 | #include <linux/if_arp.h> | |
42 | #include <linux/route.h> | |
43 | #include <linux/init.h> | |
44 | #include <linux/proc_fs.h> | |
45 | #include <linux/seq_file.h> | |
5a0e3ad6 | 46 | #include <linux/slab.h> |
9d4a0314 | 47 | #include <linux/pkt_sched.h> |
6e7cb837 | 48 | #include <net/mld.h> |
1da177e4 LT |
49 | |
50 | #include <linux/netfilter.h> | |
51 | #include <linux/netfilter_ipv6.h> | |
52 | ||
457c4cbc | 53 | #include <net/net_namespace.h> |
1da177e4 LT |
54 | #include <net/sock.h> |
55 | #include <net/snmp.h> | |
56 | ||
57 | #include <net/ipv6.h> | |
58 | #include <net/protocol.h> | |
59 | #include <net/if_inet6.h> | |
60 | #include <net/ndisc.h> | |
61 | #include <net/addrconf.h> | |
62 | #include <net/ip6_route.h> | |
1ed8516f | 63 | #include <net/inet_common.h> |
1da177e4 LT |
64 | |
65 | #include <net/ip6_checksum.h> | |
66 | ||
67 | /* Set to 3 to get tracing... */ | |
68 | #define MCAST_DEBUG 2 | |
69 | ||
70 | #if MCAST_DEBUG >= 3 | |
71 | #define MDBG(x) printk x | |
72 | #else | |
73 | #define MDBG(x) | |
74 | #endif | |
75 | ||
6e7cb837 YH |
76 | /* Ensure that we have struct in6_addr aligned on 32bit word. */ |
77 | static void *__mld2_query_bugs[] __attribute__((__unused__)) = { | |
78 | BUILD_BUG_ON_NULL(offsetof(struct mld2_query, mld2q_srcs) % 4), | |
79 | BUILD_BUG_ON_NULL(offsetof(struct mld2_report, mld2r_grec) % 4), | |
80 | BUILD_BUG_ON_NULL(offsetof(struct mld2_grec, grec_mca) % 4) | |
1da177e4 LT |
81 | }; |
82 | ||
83 | static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT; | |
84 | ||
85 | /* Big mc list lock for all the sockets */ | |
456b61bc | 86 | static DEFINE_SPINLOCK(ipv6_sk_mc_lock); |
1da177e4 | 87 | |
1da177e4 LT |
88 | static void igmp6_join_group(struct ifmcaddr6 *ma); |
89 | static void igmp6_leave_group(struct ifmcaddr6 *ma); | |
90 | static void igmp6_timer_handler(unsigned long data); | |
91 | ||
92 | static void mld_gq_timer_expire(unsigned long data); | |
93 | static void mld_ifc_timer_expire(unsigned long data); | |
94 | static void mld_ifc_event(struct inet6_dev *idev); | |
95 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc); | |
b71d1d42 | 96 | static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *addr); |
1da177e4 LT |
97 | static void mld_clear_delrec(struct inet6_dev *idev); |
98 | static int sf_setstate(struct ifmcaddr6 *pmc); | |
99 | static void sf_markstate(struct ifmcaddr6 *pmc); | |
100 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc); | |
b71d1d42 ED |
101 | static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
102 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 | 103 | int delta); |
b71d1d42 ED |
104 | static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
105 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
106 | int delta); |
107 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
108 | struct inet6_dev *idev); | |
109 | ||
1da177e4 LT |
110 | #define MLD_QRV_DEFAULT 2 |
111 | ||
9fd07841 DB |
112 | /* RFC3810, 8.1 Query Version Distinctions */ |
113 | #define MLD_V1_QUERY_LEN 24 | |
114 | #define MLD_V2_QUERY_LEN_MIN 28 | |
115 | ||
53b7997f | 116 | #define MLD_V1_SEEN(idev) (dev_net((idev)->dev)->ipv6.devconf_all->force_mld_version == 1 || \ |
1da177e4 LT |
117 | (idev)->cnf.force_mld_version == 1 || \ |
118 | ((idev)->mc_v1_seen && \ | |
119 | time_before(jiffies, (idev)->mc_v1_seen))) | |
120 | ||
6f4353d8 | 121 | #define IPV6_MLD_MAX_MSF 64 |
1da177e4 | 122 | |
ab32ea5d | 123 | int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF; |
1da177e4 LT |
124 | |
125 | /* | |
126 | * socket join on multicast group | |
127 | */ | |
128 | ||
456b61bc ED |
129 | #define for_each_pmc_rcu(np, pmc) \ |
130 | for (pmc = rcu_dereference(np->ipv6_mc_list); \ | |
131 | pmc != NULL; \ | |
132 | pmc = rcu_dereference(pmc->next)) | |
133 | ||
fc4eba58 HFS |
134 | static int unsolicited_report_interval(struct inet6_dev *idev) |
135 | { | |
136 | int iv; | |
137 | ||
138 | if (MLD_V1_SEEN(idev)) | |
139 | iv = idev->cnf.mldv1_unsolicited_report_interval; | |
140 | else | |
141 | iv = idev->cnf.mldv2_unsolicited_report_interval; | |
142 | ||
143 | return iv > 0 ? iv : 1; | |
144 | } | |
145 | ||
9acd9f3a | 146 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) |
1da177e4 LT |
147 | { |
148 | struct net_device *dev = NULL; | |
149 | struct ipv6_mc_socklist *mc_lst; | |
150 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 151 | struct net *net = sock_net(sk); |
1da177e4 LT |
152 | int err; |
153 | ||
154 | if (!ipv6_addr_is_multicast(addr)) | |
155 | return -EINVAL; | |
156 | ||
456b61bc ED |
157 | rcu_read_lock(); |
158 | for_each_pmc_rcu(np, mc_lst) { | |
c9e3e8b6 DS |
159 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
160 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
456b61bc | 161 | rcu_read_unlock(); |
c9e3e8b6 DS |
162 | return -EADDRINUSE; |
163 | } | |
164 | } | |
456b61bc | 165 | rcu_read_unlock(); |
c9e3e8b6 | 166 | |
1da177e4 LT |
167 | mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL); |
168 | ||
169 | if (mc_lst == NULL) | |
170 | return -ENOMEM; | |
171 | ||
172 | mc_lst->next = NULL; | |
4e3fd7a0 | 173 | mc_lst->addr = *addr; |
1da177e4 | 174 | |
96b52e61 | 175 | rcu_read_lock(); |
1da177e4 LT |
176 | if (ifindex == 0) { |
177 | struct rt6_info *rt; | |
b8ad0cbc | 178 | rt = rt6_lookup(net, addr, NULL, 0, 0); |
1da177e4 | 179 | if (rt) { |
d1918542 | 180 | dev = rt->dst.dev; |
94e187c0 | 181 | ip6_rt_put(rt); |
1da177e4 LT |
182 | } |
183 | } else | |
96b52e61 | 184 | dev = dev_get_by_index_rcu(net, ifindex); |
1da177e4 LT |
185 | |
186 | if (dev == NULL) { | |
96b52e61 | 187 | rcu_read_unlock(); |
1da177e4 LT |
188 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
189 | return -ENODEV; | |
190 | } | |
191 | ||
192 | mc_lst->ifindex = dev->ifindex; | |
193 | mc_lst->sfmode = MCAST_EXCLUDE; | |
196433c5 | 194 | rwlock_init(&mc_lst->sflock); |
1da177e4 LT |
195 | mc_lst->sflist = NULL; |
196 | ||
197 | /* | |
198 | * now add/increase the group membership on the device | |
199 | */ | |
200 | ||
201 | err = ipv6_dev_mc_inc(dev, addr); | |
202 | ||
203 | if (err) { | |
96b52e61 | 204 | rcu_read_unlock(); |
1da177e4 | 205 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
1da177e4 LT |
206 | return err; |
207 | } | |
208 | ||
456b61bc | 209 | spin_lock(&ipv6_sk_mc_lock); |
1da177e4 | 210 | mc_lst->next = np->ipv6_mc_list; |
456b61bc ED |
211 | rcu_assign_pointer(np->ipv6_mc_list, mc_lst); |
212 | spin_unlock(&ipv6_sk_mc_lock); | |
1da177e4 | 213 | |
96b52e61 | 214 | rcu_read_unlock(); |
1da177e4 LT |
215 | |
216 | return 0; | |
217 | } | |
218 | ||
219 | /* | |
220 | * socket leave on multicast group | |
221 | */ | |
9acd9f3a | 222 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) |
1da177e4 LT |
223 | { |
224 | struct ipv6_pinfo *np = inet6_sk(sk); | |
456b61bc ED |
225 | struct ipv6_mc_socklist *mc_lst; |
226 | struct ipv6_mc_socklist __rcu **lnk; | |
3b1e0a65 | 227 | struct net *net = sock_net(sk); |
1da177e4 | 228 | |
a858d64b LW |
229 | if (!ipv6_addr_is_multicast(addr)) |
230 | return -EINVAL; | |
231 | ||
456b61bc ED |
232 | spin_lock(&ipv6_sk_mc_lock); |
233 | for (lnk = &np->ipv6_mc_list; | |
234 | (mc_lst = rcu_dereference_protected(*lnk, | |
235 | lockdep_is_held(&ipv6_sk_mc_lock))) !=NULL ; | |
236 | lnk = &mc_lst->next) { | |
1da177e4 LT |
237 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && |
238 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
239 | struct net_device *dev; | |
240 | ||
241 | *lnk = mc_lst->next; | |
456b61bc | 242 | spin_unlock(&ipv6_sk_mc_lock); |
1da177e4 | 243 | |
96b52e61 ED |
244 | rcu_read_lock(); |
245 | dev = dev_get_by_index_rcu(net, mc_lst->ifindex); | |
b8ad0cbc | 246 | if (dev != NULL) { |
96b52e61 | 247 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 248 | |
acd6e00b | 249 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 250 | if (idev) |
1da177e4 | 251 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
252 | } else |
253 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
96b52e61 | 254 | rcu_read_unlock(); |
456b61bc | 255 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 256 | kfree_rcu(mc_lst, rcu); |
1da177e4 LT |
257 | return 0; |
258 | } | |
259 | } | |
456b61bc | 260 | spin_unlock(&ipv6_sk_mc_lock); |
1da177e4 | 261 | |
9951f036 | 262 | return -EADDRNOTAVAIL; |
1da177e4 LT |
263 | } |
264 | ||
96b52e61 ED |
265 | /* called with rcu_read_lock() */ |
266 | static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net, | |
b71d1d42 | 267 | const struct in6_addr *group, |
96b52e61 | 268 | int ifindex) |
1da177e4 LT |
269 | { |
270 | struct net_device *dev = NULL; | |
271 | struct inet6_dev *idev = NULL; | |
272 | ||
273 | if (ifindex == 0) { | |
96b52e61 | 274 | struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, 0); |
1da177e4 | 275 | |
1da177e4 | 276 | if (rt) { |
d1918542 | 277 | dev = rt->dst.dev; |
94e187c0 | 278 | ip6_rt_put(rt); |
1da177e4 LT |
279 | } |
280 | } else | |
96b52e61 | 281 | dev = dev_get_by_index_rcu(net, ifindex); |
1da177e4 LT |
282 | |
283 | if (!dev) | |
96b52e61 ED |
284 | return NULL; |
285 | idev = __in6_dev_get(dev); | |
448eb71f | 286 | if (!idev) |
8a22c99a | 287 | return NULL; |
1da177e4 | 288 | read_lock_bh(&idev->lock); |
96b52e61 ED |
289 | if (idev->dead) { |
290 | read_unlock_bh(&idev->lock); | |
291 | return NULL; | |
292 | } | |
1da177e4 LT |
293 | return idev; |
294 | } | |
295 | ||
296 | void ipv6_sock_mc_close(struct sock *sk) | |
297 | { | |
298 | struct ipv6_pinfo *np = inet6_sk(sk); | |
299 | struct ipv6_mc_socklist *mc_lst; | |
3b1e0a65 | 300 | struct net *net = sock_net(sk); |
1da177e4 | 301 | |
0e1efe9d ED |
302 | if (!rcu_access_pointer(np->ipv6_mc_list)) |
303 | return; | |
304 | ||
456b61bc ED |
305 | spin_lock(&ipv6_sk_mc_lock); |
306 | while ((mc_lst = rcu_dereference_protected(np->ipv6_mc_list, | |
307 | lockdep_is_held(&ipv6_sk_mc_lock))) != NULL) { | |
1da177e4 LT |
308 | struct net_device *dev; |
309 | ||
310 | np->ipv6_mc_list = mc_lst->next; | |
456b61bc | 311 | spin_unlock(&ipv6_sk_mc_lock); |
1da177e4 | 312 | |
96b52e61 ED |
313 | rcu_read_lock(); |
314 | dev = dev_get_by_index_rcu(net, mc_lst->ifindex); | |
1da177e4 | 315 | if (dev) { |
96b52e61 | 316 | struct inet6_dev *idev = __in6_dev_get(dev); |
1da177e4 | 317 | |
acd6e00b | 318 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
96b52e61 | 319 | if (idev) |
1da177e4 | 320 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
acd6e00b DS |
321 | } else |
322 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
96b52e61 | 323 | rcu_read_unlock(); |
1da177e4 | 324 | |
456b61bc | 325 | atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); |
e3cbf28f | 326 | kfree_rcu(mc_lst, rcu); |
456b61bc ED |
327 | |
328 | spin_lock(&ipv6_sk_mc_lock); | |
1da177e4 | 329 | } |
456b61bc | 330 | spin_unlock(&ipv6_sk_mc_lock); |
1da177e4 LT |
331 | } |
332 | ||
333 | int ip6_mc_source(int add, int omode, struct sock *sk, | |
334 | struct group_source_req *pgsr) | |
335 | { | |
336 | struct in6_addr *source, *group; | |
337 | struct ipv6_mc_socklist *pmc; | |
1da177e4 LT |
338 | struct inet6_dev *idev; |
339 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
340 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 341 | struct net *net = sock_net(sk); |
1da177e4 | 342 | int i, j, rv; |
c9e3e8b6 | 343 | int leavegroup = 0; |
5ab4a6c8 | 344 | int pmclocked = 0; |
1da177e4 LT |
345 | int err; |
346 | ||
1da177e4 LT |
347 | source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr; |
348 | group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr; | |
349 | ||
350 | if (!ipv6_addr_is_multicast(group)) | |
351 | return -EINVAL; | |
352 | ||
96b52e61 ED |
353 | rcu_read_lock(); |
354 | idev = ip6_mc_find_dev_rcu(net, group, pgsr->gsr_interface); | |
355 | if (!idev) { | |
356 | rcu_read_unlock(); | |
1da177e4 | 357 | return -ENODEV; |
96b52e61 | 358 | } |
1da177e4 LT |
359 | |
360 | err = -EADDRNOTAVAIL; | |
361 | ||
456b61bc | 362 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
363 | if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface) |
364 | continue; | |
365 | if (ipv6_addr_equal(&pmc->addr, group)) | |
366 | break; | |
367 | } | |
917f2f10 DS |
368 | if (!pmc) { /* must have a prior join */ |
369 | err = -EINVAL; | |
1da177e4 | 370 | goto done; |
917f2f10 | 371 | } |
1da177e4 LT |
372 | /* if a source filter was set, must be the same mode as before */ |
373 | if (pmc->sflist) { | |
917f2f10 DS |
374 | if (pmc->sfmode != omode) { |
375 | err = -EINVAL; | |
1da177e4 | 376 | goto done; |
917f2f10 | 377 | } |
1da177e4 LT |
378 | } else if (pmc->sfmode != omode) { |
379 | /* allow mode switches for empty-set filters */ | |
380 | ip6_mc_add_src(idev, group, omode, 0, NULL, 0); | |
381 | ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
382 | pmc->sfmode = omode; | |
383 | } | |
384 | ||
96b52e61 | 385 | write_lock(&pmc->sflock); |
5ab4a6c8 DS |
386 | pmclocked = 1; |
387 | ||
1da177e4 LT |
388 | psl = pmc->sflist; |
389 | if (!add) { | |
390 | if (!psl) | |
917f2f10 | 391 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 LT |
392 | rv = !0; |
393 | for (i=0; i<psl->sl_count; i++) { | |
07c2fecc | 394 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
1da177e4 LT |
395 | if (rv == 0) |
396 | break; | |
397 | } | |
398 | if (rv) /* source not found */ | |
917f2f10 | 399 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 400 | |
c9e3e8b6 DS |
401 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
402 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { | |
403 | leavegroup = 1; | |
404 | goto done; | |
405 | } | |
406 | ||
1da177e4 LT |
407 | /* update the interface filter */ |
408 | ip6_mc_del_src(idev, group, omode, 1, source, 1); | |
409 | ||
410 | for (j=i+1; j<psl->sl_count; j++) | |
411 | psl->sl_addr[j-1] = psl->sl_addr[j]; | |
412 | psl->sl_count--; | |
413 | err = 0; | |
414 | goto done; | |
415 | } | |
416 | /* else, add a new source to the filter */ | |
417 | ||
418 | if (psl && psl->sl_count >= sysctl_mld_max_msf) { | |
419 | err = -ENOBUFS; | |
420 | goto done; | |
421 | } | |
422 | if (!psl || psl->sl_count == psl->sl_max) { | |
423 | struct ip6_sf_socklist *newpsl; | |
424 | int count = IP6_SFBLOCK; | |
425 | ||
426 | if (psl) | |
427 | count += psl->sl_max; | |
8b3a7005 | 428 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC); |
1da177e4 LT |
429 | if (!newpsl) { |
430 | err = -ENOBUFS; | |
431 | goto done; | |
432 | } | |
433 | newpsl->sl_max = count; | |
434 | newpsl->sl_count = count - IP6_SFBLOCK; | |
435 | if (psl) { | |
436 | for (i=0; i<psl->sl_count; i++) | |
437 | newpsl->sl_addr[i] = psl->sl_addr[i]; | |
438 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
439 | } | |
440 | pmc->sflist = psl = newpsl; | |
441 | } | |
442 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ | |
443 | for (i=0; i<psl->sl_count; i++) { | |
07c2fecc | 444 | rv = !ipv6_addr_equal(&psl->sl_addr[i], source); |
56db1c5f JS |
445 | if (rv == 0) /* There is an error in the address. */ |
446 | goto done; | |
1da177e4 | 447 | } |
1da177e4 LT |
448 | for (j=psl->sl_count-1; j>=i; j--) |
449 | psl->sl_addr[j+1] = psl->sl_addr[j]; | |
450 | psl->sl_addr[i] = *source; | |
451 | psl->sl_count++; | |
452 | err = 0; | |
453 | /* update the interface list */ | |
454 | ip6_mc_add_src(idev, group, omode, 1, source, 1); | |
455 | done: | |
5ab4a6c8 | 456 | if (pmclocked) |
96b52e61 | 457 | write_unlock(&pmc->sflock); |
1da177e4 | 458 | read_unlock_bh(&idev->lock); |
96b52e61 | 459 | rcu_read_unlock(); |
c9e3e8b6 DS |
460 | if (leavegroup) |
461 | return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group); | |
1da177e4 LT |
462 | return err; |
463 | } | |
464 | ||
465 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) | |
466 | { | |
b71d1d42 | 467 | const struct in6_addr *group; |
1da177e4 | 468 | struct ipv6_mc_socklist *pmc; |
1da177e4 LT |
469 | struct inet6_dev *idev; |
470 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
471 | struct ip6_sf_socklist *newpsl, *psl; | |
3b1e0a65 | 472 | struct net *net = sock_net(sk); |
9951f036 | 473 | int leavegroup = 0; |
1da177e4 LT |
474 | int i, err; |
475 | ||
476 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
477 | ||
478 | if (!ipv6_addr_is_multicast(group)) | |
479 | return -EINVAL; | |
480 | if (gsf->gf_fmode != MCAST_INCLUDE && | |
481 | gsf->gf_fmode != MCAST_EXCLUDE) | |
482 | return -EINVAL; | |
483 | ||
96b52e61 ED |
484 | rcu_read_lock(); |
485 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 486 | |
96b52e61 ED |
487 | if (!idev) { |
488 | rcu_read_unlock(); | |
1da177e4 | 489 | return -ENODEV; |
96b52e61 | 490 | } |
1da177e4 | 491 | |
9c05989b | 492 | err = 0; |
5ab4a6c8 | 493 | |
9951f036 DS |
494 | if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) { |
495 | leavegroup = 1; | |
496 | goto done; | |
497 | } | |
498 | ||
456b61bc | 499 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
500 | if (pmc->ifindex != gsf->gf_interface) |
501 | continue; | |
502 | if (ipv6_addr_equal(&pmc->addr, group)) | |
503 | break; | |
504 | } | |
917f2f10 DS |
505 | if (!pmc) { /* must have a prior join */ |
506 | err = -EINVAL; | |
1da177e4 | 507 | goto done; |
917f2f10 | 508 | } |
1da177e4 | 509 | if (gsf->gf_numsrc) { |
8b3a7005 KK |
510 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc), |
511 | GFP_ATOMIC); | |
1da177e4 LT |
512 | if (!newpsl) { |
513 | err = -ENOBUFS; | |
514 | goto done; | |
515 | } | |
516 | newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc; | |
517 | for (i=0; i<newpsl->sl_count; ++i) { | |
518 | struct sockaddr_in6 *psin6; | |
519 | ||
520 | psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i]; | |
521 | newpsl->sl_addr[i] = psin6->sin6_addr; | |
522 | } | |
523 | err = ip6_mc_add_src(idev, group, gsf->gf_fmode, | |
524 | newpsl->sl_count, newpsl->sl_addr, 0); | |
525 | if (err) { | |
526 | sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); | |
527 | goto done; | |
528 | } | |
8713dbf0 | 529 | } else { |
1da177e4 | 530 | newpsl = NULL; |
8713dbf0 YZ |
531 | (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); |
532 | } | |
5ab4a6c8 | 533 | |
96b52e61 | 534 | write_lock(&pmc->sflock); |
1da177e4 LT |
535 | psl = pmc->sflist; |
536 | if (psl) { | |
537 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, | |
538 | psl->sl_count, psl->sl_addr, 0); | |
539 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
540 | } else | |
541 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
542 | pmc->sflist = newpsl; | |
543 | pmc->sfmode = gsf->gf_fmode; | |
96b52e61 | 544 | write_unlock(&pmc->sflock); |
917f2f10 | 545 | err = 0; |
1da177e4 LT |
546 | done: |
547 | read_unlock_bh(&idev->lock); | |
96b52e61 | 548 | rcu_read_unlock(); |
9951f036 DS |
549 | if (leavegroup) |
550 | err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group); | |
1da177e4 LT |
551 | return err; |
552 | } | |
553 | ||
554 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
555 | struct group_filter __user *optval, int __user *optlen) | |
556 | { | |
557 | int err, i, count, copycount; | |
b71d1d42 | 558 | const struct in6_addr *group; |
1da177e4 LT |
559 | struct ipv6_mc_socklist *pmc; |
560 | struct inet6_dev *idev; | |
1da177e4 LT |
561 | struct ipv6_pinfo *inet6 = inet6_sk(sk); |
562 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 563 | struct net *net = sock_net(sk); |
1da177e4 LT |
564 | |
565 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
566 | ||
567 | if (!ipv6_addr_is_multicast(group)) | |
568 | return -EINVAL; | |
569 | ||
96b52e61 ED |
570 | rcu_read_lock(); |
571 | idev = ip6_mc_find_dev_rcu(net, group, gsf->gf_interface); | |
1da177e4 | 572 | |
96b52e61 ED |
573 | if (!idev) { |
574 | rcu_read_unlock(); | |
1da177e4 | 575 | return -ENODEV; |
96b52e61 | 576 | } |
1da177e4 LT |
577 | |
578 | err = -EADDRNOTAVAIL; | |
5ab4a6c8 DS |
579 | /* |
580 | * changes to the ipv6_mc_list require the socket lock and | |
581 | * a read lock on ip6_sk_mc_lock. We have the socket lock, | |
582 | * so reading the list is safe. | |
583 | */ | |
1da177e4 | 584 | |
456b61bc | 585 | for_each_pmc_rcu(inet6, pmc) { |
1da177e4 LT |
586 | if (pmc->ifindex != gsf->gf_interface) |
587 | continue; | |
588 | if (ipv6_addr_equal(group, &pmc->addr)) | |
589 | break; | |
590 | } | |
591 | if (!pmc) /* must have a prior join */ | |
592 | goto done; | |
593 | gsf->gf_fmode = pmc->sfmode; | |
594 | psl = pmc->sflist; | |
595 | count = psl ? psl->sl_count : 0; | |
596 | read_unlock_bh(&idev->lock); | |
96b52e61 | 597 | rcu_read_unlock(); |
1da177e4 LT |
598 | |
599 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; | |
600 | gsf->gf_numsrc = count; | |
601 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || | |
602 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { | |
603 | return -EFAULT; | |
604 | } | |
5ab4a6c8 DS |
605 | /* changes to psl require the socket lock, a read lock on |
606 | * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We | |
607 | * have the socket lock, so reading here is safe. | |
608 | */ | |
1da177e4 LT |
609 | for (i=0; i<copycount; i++) { |
610 | struct sockaddr_in6 *psin6; | |
611 | struct sockaddr_storage ss; | |
612 | ||
613 | psin6 = (struct sockaddr_in6 *)&ss; | |
614 | memset(&ss, 0, sizeof(ss)); | |
615 | psin6->sin6_family = AF_INET6; | |
616 | psin6->sin6_addr = psl->sl_addr[i]; | |
1ab1457c | 617 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) |
1da177e4 LT |
618 | return -EFAULT; |
619 | } | |
620 | return 0; | |
621 | done: | |
622 | read_unlock_bh(&idev->lock); | |
96b52e61 | 623 | rcu_read_unlock(); |
1da177e4 LT |
624 | return err; |
625 | } | |
626 | ||
a50feda5 ED |
627 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, |
628 | const struct in6_addr *src_addr) | |
1da177e4 LT |
629 | { |
630 | struct ipv6_pinfo *np = inet6_sk(sk); | |
631 | struct ipv6_mc_socklist *mc; | |
632 | struct ip6_sf_socklist *psl; | |
a50feda5 | 633 | bool rv = true; |
1da177e4 | 634 | |
456b61bc ED |
635 | rcu_read_lock(); |
636 | for_each_pmc_rcu(np, mc) { | |
1da177e4 LT |
637 | if (ipv6_addr_equal(&mc->addr, mc_addr)) |
638 | break; | |
639 | } | |
640 | if (!mc) { | |
456b61bc | 641 | rcu_read_unlock(); |
a50feda5 | 642 | return true; |
1da177e4 | 643 | } |
5ab4a6c8 | 644 | read_lock(&mc->sflock); |
1da177e4 LT |
645 | psl = mc->sflist; |
646 | if (!psl) { | |
647 | rv = mc->sfmode == MCAST_EXCLUDE; | |
648 | } else { | |
649 | int i; | |
650 | ||
651 | for (i=0; i<psl->sl_count; i++) { | |
652 | if (ipv6_addr_equal(&psl->sl_addr[i], src_addr)) | |
653 | break; | |
654 | } | |
655 | if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) | |
a50feda5 | 656 | rv = false; |
1da177e4 | 657 | if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) |
a50feda5 | 658 | rv = false; |
1da177e4 | 659 | } |
5ab4a6c8 | 660 | read_unlock(&mc->sflock); |
456b61bc | 661 | rcu_read_unlock(); |
1da177e4 LT |
662 | |
663 | return rv; | |
664 | } | |
665 | ||
666 | static void ma_put(struct ifmcaddr6 *mc) | |
667 | { | |
668 | if (atomic_dec_and_test(&mc->mca_refcnt)) { | |
669 | in6_dev_put(mc->idev); | |
670 | kfree(mc); | |
671 | } | |
672 | } | |
673 | ||
674 | static void igmp6_group_added(struct ifmcaddr6 *mc) | |
675 | { | |
676 | struct net_device *dev = mc->idev->dev; | |
677 | char buf[MAX_ADDR_LEN]; | |
678 | ||
ec16ef22 YH |
679 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
680 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
681 | return; | |
682 | ||
1da177e4 LT |
683 | spin_lock_bh(&mc->mca_lock); |
684 | if (!(mc->mca_flags&MAF_LOADED)) { | |
685 | mc->mca_flags |= MAF_LOADED; | |
686 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 687 | dev_mc_add(dev, buf); |
1da177e4 LT |
688 | } |
689 | spin_unlock_bh(&mc->mca_lock); | |
690 | ||
691 | if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT)) | |
692 | return; | |
693 | ||
694 | if (MLD_V1_SEEN(mc->idev)) { | |
695 | igmp6_join_group(mc); | |
696 | return; | |
697 | } | |
698 | /* else v2 */ | |
699 | ||
700 | mc->mca_crcount = mc->idev->mc_qrv; | |
701 | mld_ifc_event(mc->idev); | |
702 | } | |
703 | ||
704 | static void igmp6_group_dropped(struct ifmcaddr6 *mc) | |
705 | { | |
706 | struct net_device *dev = mc->idev->dev; | |
707 | char buf[MAX_ADDR_LEN]; | |
708 | ||
ec16ef22 YH |
709 | if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < |
710 | IPV6_ADDR_SCOPE_LINKLOCAL) | |
711 | return; | |
712 | ||
1da177e4 LT |
713 | spin_lock_bh(&mc->mca_lock); |
714 | if (mc->mca_flags&MAF_LOADED) { | |
715 | mc->mca_flags &= ~MAF_LOADED; | |
716 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 717 | dev_mc_del(dev, buf); |
1da177e4 LT |
718 | } |
719 | ||
720 | if (mc->mca_flags & MAF_NOREPORT) | |
721 | goto done; | |
722 | spin_unlock_bh(&mc->mca_lock); | |
723 | ||
724 | if (!mc->idev->dead) | |
725 | igmp6_leave_group(mc); | |
726 | ||
727 | spin_lock_bh(&mc->mca_lock); | |
728 | if (del_timer(&mc->mca_timer)) | |
729 | atomic_dec(&mc->mca_refcnt); | |
730 | done: | |
731 | ip6_mc_clear_src(mc); | |
732 | spin_unlock_bh(&mc->mca_lock); | |
733 | } | |
734 | ||
735 | /* | |
736 | * deleted ifmcaddr6 manipulation | |
737 | */ | |
738 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) | |
739 | { | |
740 | struct ifmcaddr6 *pmc; | |
741 | ||
742 | /* this is an "ifmcaddr6" for convenience; only the fields below | |
743 | * are actually used. In particular, the refcnt and users are not | |
744 | * used for management of the delete list. Using the same structure | |
745 | * for deleted items allows change reports to use common code with | |
746 | * non-deleted or query-response MCA's. | |
747 | */ | |
0c600eda | 748 | pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC); |
1da177e4 LT |
749 | if (!pmc) |
750 | return; | |
0c600eda | 751 | |
1da177e4 LT |
752 | spin_lock_bh(&im->mca_lock); |
753 | spin_lock_init(&pmc->mca_lock); | |
754 | pmc->idev = im->idev; | |
755 | in6_dev_hold(idev); | |
756 | pmc->mca_addr = im->mca_addr; | |
757 | pmc->mca_crcount = idev->mc_qrv; | |
758 | pmc->mca_sfmode = im->mca_sfmode; | |
759 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
760 | struct ip6_sf_list *psf; | |
761 | ||
762 | pmc->mca_tomb = im->mca_tomb; | |
763 | pmc->mca_sources = im->mca_sources; | |
764 | im->mca_tomb = im->mca_sources = NULL; | |
765 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) | |
766 | psf->sf_crcount = pmc->mca_crcount; | |
767 | } | |
768 | spin_unlock_bh(&im->mca_lock); | |
769 | ||
6457d26b | 770 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
771 | pmc->next = idev->mc_tomb; |
772 | idev->mc_tomb = pmc; | |
6457d26b | 773 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
774 | } |
775 | ||
b71d1d42 | 776 | static void mld_del_delrec(struct inet6_dev *idev, const struct in6_addr *pmca) |
1da177e4 LT |
777 | { |
778 | struct ifmcaddr6 *pmc, *pmc_prev; | |
779 | struct ip6_sf_list *psf, *psf_next; | |
780 | ||
6457d26b | 781 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
782 | pmc_prev = NULL; |
783 | for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) { | |
784 | if (ipv6_addr_equal(&pmc->mca_addr, pmca)) | |
785 | break; | |
786 | pmc_prev = pmc; | |
787 | } | |
788 | if (pmc) { | |
789 | if (pmc_prev) | |
790 | pmc_prev->next = pmc->next; | |
791 | else | |
792 | idev->mc_tomb = pmc->next; | |
793 | } | |
6457d26b SH |
794 | spin_unlock_bh(&idev->mc_lock); |
795 | ||
1da177e4 LT |
796 | if (pmc) { |
797 | for (psf=pmc->mca_tomb; psf; psf=psf_next) { | |
798 | psf_next = psf->sf_next; | |
799 | kfree(psf); | |
800 | } | |
801 | in6_dev_put(pmc->idev); | |
802 | kfree(pmc); | |
803 | } | |
804 | } | |
805 | ||
806 | static void mld_clear_delrec(struct inet6_dev *idev) | |
807 | { | |
808 | struct ifmcaddr6 *pmc, *nextpmc; | |
809 | ||
6457d26b | 810 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
811 | pmc = idev->mc_tomb; |
812 | idev->mc_tomb = NULL; | |
6457d26b | 813 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
814 | |
815 | for (; pmc; pmc = nextpmc) { | |
816 | nextpmc = pmc->next; | |
817 | ip6_mc_clear_src(pmc); | |
818 | in6_dev_put(pmc->idev); | |
819 | kfree(pmc); | |
820 | } | |
821 | ||
822 | /* clear dead sources, too */ | |
823 | read_lock_bh(&idev->lock); | |
824 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
825 | struct ip6_sf_list *psf, *psf_next; | |
826 | ||
827 | spin_lock_bh(&pmc->mca_lock); | |
828 | psf = pmc->mca_tomb; | |
829 | pmc->mca_tomb = NULL; | |
830 | spin_unlock_bh(&pmc->mca_lock); | |
831 | for (; psf; psf=psf_next) { | |
832 | psf_next = psf->sf_next; | |
833 | kfree(psf); | |
834 | } | |
835 | } | |
836 | read_unlock_bh(&idev->lock); | |
837 | } | |
838 | ||
839 | ||
840 | /* | |
841 | * device multicast group inc (add if not found) | |
842 | */ | |
9acd9f3a | 843 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
844 | { |
845 | struct ifmcaddr6 *mc; | |
846 | struct inet6_dev *idev; | |
847 | ||
96b52e61 | 848 | /* we need to take a reference on idev */ |
1da177e4 LT |
849 | idev = in6_dev_get(dev); |
850 | ||
851 | if (idev == NULL) | |
852 | return -EINVAL; | |
853 | ||
854 | write_lock_bh(&idev->lock); | |
855 | if (idev->dead) { | |
856 | write_unlock_bh(&idev->lock); | |
857 | in6_dev_put(idev); | |
858 | return -ENODEV; | |
859 | } | |
860 | ||
861 | for (mc = idev->mc_list; mc; mc = mc->next) { | |
862 | if (ipv6_addr_equal(&mc->mca_addr, addr)) { | |
863 | mc->mca_users++; | |
864 | write_unlock_bh(&idev->lock); | |
865 | ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0, | |
866 | NULL, 0); | |
867 | in6_dev_put(idev); | |
868 | return 0; | |
869 | } | |
870 | } | |
871 | ||
872 | /* | |
873 | * not found: create a new one. | |
874 | */ | |
875 | ||
0c600eda | 876 | mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC); |
1da177e4 LT |
877 | |
878 | if (mc == NULL) { | |
879 | write_unlock_bh(&idev->lock); | |
880 | in6_dev_put(idev); | |
881 | return -ENOMEM; | |
882 | } | |
883 | ||
b24b8a24 | 884 | setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc); |
1da177e4 | 885 | |
4e3fd7a0 | 886 | mc->mca_addr = *addr; |
96b52e61 | 887 | mc->idev = idev; /* (reference taken) */ |
1da177e4 LT |
888 | mc->mca_users = 1; |
889 | /* mca_stamp should be updated upon changes */ | |
890 | mc->mca_cstamp = mc->mca_tstamp = jiffies; | |
891 | atomic_set(&mc->mca_refcnt, 2); | |
892 | spin_lock_init(&mc->mca_lock); | |
893 | ||
894 | /* initial mode is (EX, empty) */ | |
895 | mc->mca_sfmode = MCAST_EXCLUDE; | |
896 | mc->mca_sfcount[MCAST_EXCLUDE] = 1; | |
897 | ||
898 | if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) || | |
899 | IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
900 | mc->mca_flags |= MAF_NOREPORT; | |
901 | ||
902 | mc->next = idev->mc_list; | |
903 | idev->mc_list = mc; | |
904 | write_unlock_bh(&idev->lock); | |
905 | ||
906 | mld_del_delrec(idev, &mc->mca_addr); | |
907 | igmp6_group_added(mc); | |
908 | ma_put(mc); | |
909 | return 0; | |
910 | } | |
911 | ||
912 | /* | |
913 | * device multicast group del | |
914 | */ | |
9acd9f3a | 915 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
916 | { |
917 | struct ifmcaddr6 *ma, **map; | |
918 | ||
919 | write_lock_bh(&idev->lock); | |
920 | for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) { | |
921 | if (ipv6_addr_equal(&ma->mca_addr, addr)) { | |
922 | if (--ma->mca_users == 0) { | |
923 | *map = ma->next; | |
924 | write_unlock_bh(&idev->lock); | |
925 | ||
926 | igmp6_group_dropped(ma); | |
927 | ||
928 | ma_put(ma); | |
929 | return 0; | |
930 | } | |
931 | write_unlock_bh(&idev->lock); | |
932 | return 0; | |
933 | } | |
934 | } | |
935 | write_unlock_bh(&idev->lock); | |
936 | ||
937 | return -ENOENT; | |
938 | } | |
939 | ||
9acd9f3a | 940 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 | 941 | { |
96b52e61 | 942 | struct inet6_dev *idev; |
1da177e4 LT |
943 | int err; |
944 | ||
96b52e61 | 945 | rcu_read_lock(); |
1da177e4 | 946 | |
96b52e61 ED |
947 | idev = __in6_dev_get(dev); |
948 | if (!idev) | |
949 | err = -ENODEV; | |
950 | else | |
951 | err = __ipv6_dev_mc_dec(idev, addr); | |
1da177e4 | 952 | |
96b52e61 | 953 | rcu_read_unlock(); |
1da177e4 LT |
954 | return err; |
955 | } | |
956 | ||
1da177e4 LT |
957 | /* |
958 | * check if the interface/address pair is valid | |
959 | */ | |
a50feda5 ED |
960 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, |
961 | const struct in6_addr *src_addr) | |
1da177e4 LT |
962 | { |
963 | struct inet6_dev *idev; | |
964 | struct ifmcaddr6 *mc; | |
a50feda5 | 965 | bool rv = false; |
1da177e4 | 966 | |
96b52e61 ED |
967 | rcu_read_lock(); |
968 | idev = __in6_dev_get(dev); | |
1da177e4 LT |
969 | if (idev) { |
970 | read_lock_bh(&idev->lock); | |
971 | for (mc = idev->mc_list; mc; mc=mc->next) { | |
972 | if (ipv6_addr_equal(&mc->mca_addr, group)) | |
973 | break; | |
974 | } | |
975 | if (mc) { | |
976 | if (src_addr && !ipv6_addr_any(src_addr)) { | |
977 | struct ip6_sf_list *psf; | |
978 | ||
979 | spin_lock_bh(&mc->mca_lock); | |
980 | for (psf=mc->mca_sources;psf;psf=psf->sf_next) { | |
981 | if (ipv6_addr_equal(&psf->sf_addr, src_addr)) | |
982 | break; | |
983 | } | |
984 | if (psf) | |
985 | rv = psf->sf_count[MCAST_INCLUDE] || | |
986 | psf->sf_count[MCAST_EXCLUDE] != | |
987 | mc->mca_sfcount[MCAST_EXCLUDE]; | |
988 | else | |
989 | rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0; | |
990 | spin_unlock_bh(&mc->mca_lock); | |
991 | } else | |
a50feda5 | 992 | rv = true; /* don't filter unspecified source */ |
1da177e4 LT |
993 | } |
994 | read_unlock_bh(&idev->lock); | |
1da177e4 | 995 | } |
96b52e61 | 996 | rcu_read_unlock(); |
1da177e4 LT |
997 | return rv; |
998 | } | |
999 | ||
1000 | static void mld_gq_start_timer(struct inet6_dev *idev) | |
1001 | { | |
c2cef4e8 | 1002 | unsigned long tv = net_random() % idev->mc_maxdelay; |
1da177e4 LT |
1003 | |
1004 | idev->mc_gq_running = 1; | |
1005 | if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2)) | |
1006 | in6_dev_hold(idev); | |
1007 | } | |
1008 | ||
c2cef4e8 | 1009 | static void mld_ifc_start_timer(struct inet6_dev *idev, unsigned long delay) |
1da177e4 | 1010 | { |
c2cef4e8 | 1011 | unsigned long tv = net_random() % delay; |
1da177e4 LT |
1012 | |
1013 | if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2)) | |
1014 | in6_dev_hold(idev); | |
1015 | } | |
1016 | ||
c2cef4e8 | 1017 | static void mld_dad_start_timer(struct inet6_dev *idev, unsigned long delay) |
b173ee48 | 1018 | { |
c2cef4e8 | 1019 | unsigned long tv = net_random() % delay; |
b173ee48 HFS |
1020 | |
1021 | if (!mod_timer(&idev->mc_dad_timer, jiffies+tv+2)) | |
1022 | in6_dev_hold(idev); | |
1023 | } | |
1024 | ||
1da177e4 LT |
1025 | /* |
1026 | * IGMP handling (alias multicast ICMPv6 messages) | |
1027 | */ | |
1028 | ||
1029 | static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) | |
1030 | { | |
1031 | unsigned long delay = resptime; | |
1032 | ||
1033 | /* Do not start timer for these addresses */ | |
1034 | if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) || | |
1035 | IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
1036 | return; | |
1037 | ||
1038 | if (del_timer(&ma->mca_timer)) { | |
1039 | atomic_dec(&ma->mca_refcnt); | |
1040 | delay = ma->mca_timer.expires - jiffies; | |
1041 | } | |
1042 | ||
1043 | if (delay >= resptime) { | |
1044 | if (resptime) | |
1045 | delay = net_random() % resptime; | |
1046 | else | |
1047 | delay = 1; | |
1048 | } | |
1049 | ma->mca_timer.expires = jiffies + delay; | |
1050 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
1051 | atomic_inc(&ma->mca_refcnt); | |
1052 | ma->mca_flags |= MAF_TIMER_RUNNING; | |
1053 | } | |
1054 | ||
5ab4a6c8 | 1055 | /* mark EXCLUDE-mode sources */ |
a50feda5 ED |
1056 | static bool mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs, |
1057 | const struct in6_addr *srcs) | |
1da177e4 LT |
1058 | { |
1059 | struct ip6_sf_list *psf; | |
1060 | int i, scount; | |
1061 | ||
1062 | scount = 0; | |
1063 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1064 | if (scount == nsrcs) | |
1065 | break; | |
5ab4a6c8 DS |
1066 | for (i=0; i<nsrcs; i++) { |
1067 | /* skip inactive filters */ | |
e05c4ad3 | 1068 | if (psf->sf_count[MCAST_INCLUDE] || |
5ab4a6c8 DS |
1069 | pmc->mca_sfcount[MCAST_EXCLUDE] != |
1070 | psf->sf_count[MCAST_EXCLUDE]) | |
ce713ee5 | 1071 | break; |
5ab4a6c8 DS |
1072 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1073 | scount++; | |
1074 | break; | |
1075 | } | |
1076 | } | |
1077 | } | |
1078 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1079 | if (scount == nsrcs) /* all sources excluded */ | |
a50feda5 ED |
1080 | return false; |
1081 | return true; | |
5ab4a6c8 DS |
1082 | } |
1083 | ||
a50feda5 ED |
1084 | static bool mld_marksources(struct ifmcaddr6 *pmc, int nsrcs, |
1085 | const struct in6_addr *srcs) | |
5ab4a6c8 DS |
1086 | { |
1087 | struct ip6_sf_list *psf; | |
1088 | int i, scount; | |
1089 | ||
1090 | if (pmc->mca_sfmode == MCAST_EXCLUDE) | |
1091 | return mld_xmarksources(pmc, nsrcs, srcs); | |
1092 | ||
1093 | /* mark INCLUDE-mode sources */ | |
1094 | ||
1095 | scount = 0; | |
1096 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1097 | if (scount == nsrcs) | |
1098 | break; | |
1099 | for (i=0; i<nsrcs; i++) { | |
1da177e4 LT |
1100 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1101 | psf->sf_gsresp = 1; | |
1102 | scount++; | |
1103 | break; | |
1104 | } | |
5ab4a6c8 DS |
1105 | } |
1106 | } | |
1107 | if (!scount) { | |
1108 | pmc->mca_flags &= ~MAF_GSQUERY; | |
a50feda5 | 1109 | return false; |
1da177e4 | 1110 | } |
5ab4a6c8 | 1111 | pmc->mca_flags |= MAF_GSQUERY; |
a50feda5 | 1112 | return true; |
1da177e4 LT |
1113 | } |
1114 | ||
96b52e61 | 1115 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1116 | int igmp6_event_query(struct sk_buff *skb) |
1117 | { | |
97300b5f | 1118 | struct mld2_query *mlh2 = NULL; |
1da177e4 | 1119 | struct ifmcaddr6 *ma; |
b71d1d42 | 1120 | const struct in6_addr *group; |
1da177e4 LT |
1121 | unsigned long max_delay; |
1122 | struct inet6_dev *idev; | |
6e7cb837 | 1123 | struct mld_msg *mld; |
1da177e4 LT |
1124 | int group_type; |
1125 | int mark = 0; | |
1126 | int len; | |
1127 | ||
1128 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) | |
1129 | return -EINVAL; | |
1130 | ||
1131 | /* compute payload length excluding extension headers */ | |
0660e03f | 1132 | len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); |
cfe1fc77 | 1133 | len -= skb_network_header_len(skb); |
1da177e4 LT |
1134 | |
1135 | /* Drop queries with not link local source */ | |
0660e03f | 1136 | if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) |
1da177e4 LT |
1137 | return -EINVAL; |
1138 | ||
96b52e61 | 1139 | idev = __in6_dev_get(skb->dev); |
1da177e4 LT |
1140 | |
1141 | if (idev == NULL) | |
1142 | return 0; | |
1143 | ||
6e7cb837 YH |
1144 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1145 | group = &mld->mld_mca; | |
1da177e4 LT |
1146 | group_type = ipv6_addr_type(group); |
1147 | ||
1148 | if (group_type != IPV6_ADDR_ANY && | |
96b52e61 | 1149 | !(group_type&IPV6_ADDR_MULTICAST)) |
1da177e4 | 1150 | return -EINVAL; |
1da177e4 | 1151 | |
9fd07841 | 1152 | if (len == MLD_V1_QUERY_LEN) { |
1da177e4 LT |
1153 | int switchback; |
1154 | /* MLDv1 router present */ | |
1155 | ||
84698963 | 1156 | max_delay = msecs_to_jiffies(ntohs(mld->mld_maxdelay)); |
1da177e4 LT |
1157 | switchback = (idev->mc_qrv + 1) * max_delay; |
1158 | idev->mc_v1_seen = jiffies + switchback; | |
1159 | ||
1160 | /* cancel the interface change timer */ | |
1161 | idev->mc_ifc_count = 0; | |
1162 | if (del_timer(&idev->mc_ifc_timer)) | |
1163 | __in6_dev_put(idev); | |
1164 | /* clear deleted report items */ | |
1165 | mld_clear_delrec(idev); | |
9fd07841 | 1166 | } else if (len >= MLD_V2_QUERY_LEN_MIN) { |
1ab1457c | 1167 | int srcs_offset = sizeof(struct mld2_query) - |
97300b5f | 1168 | sizeof(struct icmp6hdr); |
96b52e61 | 1169 | if (!pskb_may_pull(skb, srcs_offset)) |
97300b5f | 1170 | return -EINVAL; |
96b52e61 | 1171 | |
9c70220b | 1172 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
84698963 DB |
1173 | |
1174 | max_delay = max(msecs_to_jiffies(MLDV2_MRC(ntohs(mlh2->mld2q_mrc))), 1UL); | |
1175 | ||
1da177e4 | 1176 | idev->mc_maxdelay = max_delay; |
84698963 | 1177 | |
6e7cb837 YH |
1178 | if (mlh2->mld2q_qrv) |
1179 | idev->mc_qrv = mlh2->mld2q_qrv; | |
1da177e4 | 1180 | if (group_type == IPV6_ADDR_ANY) { /* general query */ |
96b52e61 | 1181 | if (mlh2->mld2q_nsrcs) |
1da177e4 | 1182 | return -EINVAL; /* no sources allowed */ |
96b52e61 | 1183 | |
1da177e4 | 1184 | mld_gq_start_timer(idev); |
1da177e4 LT |
1185 | return 0; |
1186 | } | |
1187 | /* mark sources to include, if group & source-specific */ | |
6e7cb837 | 1188 | if (mlh2->mld2q_nsrcs != 0) { |
1ab1457c | 1189 | if (!pskb_may_pull(skb, srcs_offset + |
96b52e61 | 1190 | ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr))) |
97300b5f | 1191 | return -EINVAL; |
96b52e61 | 1192 | |
9c70220b | 1193 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
97300b5f YZ |
1194 | mark = 1; |
1195 | } | |
96b52e61 | 1196 | } else |
1da177e4 | 1197 | return -EINVAL; |
1da177e4 LT |
1198 | |
1199 | read_lock_bh(&idev->lock); | |
1200 | if (group_type == IPV6_ADDR_ANY) { | |
1201 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
1202 | spin_lock_bh(&ma->mca_lock); | |
1203 | igmp6_group_queried(ma, max_delay); | |
1204 | spin_unlock_bh(&ma->mca_lock); | |
1205 | } | |
1206 | } else { | |
1207 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
7add2a43 | 1208 | if (!ipv6_addr_equal(group, &ma->mca_addr)) |
1da177e4 LT |
1209 | continue; |
1210 | spin_lock_bh(&ma->mca_lock); | |
1211 | if (ma->mca_flags & MAF_TIMER_RUNNING) { | |
1212 | /* gsquery <- gsquery && mark */ | |
1213 | if (!mark) | |
1214 | ma->mca_flags &= ~MAF_GSQUERY; | |
1215 | } else { | |
1216 | /* gsquery <- mark */ | |
1217 | if (mark) | |
1218 | ma->mca_flags |= MAF_GSQUERY; | |
1219 | else | |
1220 | ma->mca_flags &= ~MAF_GSQUERY; | |
1221 | } | |
5ab4a6c8 | 1222 | if (!(ma->mca_flags & MAF_GSQUERY) || |
6e7cb837 | 1223 | mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs)) |
5ab4a6c8 | 1224 | igmp6_group_queried(ma, max_delay); |
1da177e4 | 1225 | spin_unlock_bh(&ma->mca_lock); |
7add2a43 | 1226 | break; |
1da177e4 LT |
1227 | } |
1228 | } | |
1229 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1230 | |
1231 | return 0; | |
1232 | } | |
1233 | ||
96b52e61 | 1234 | /* called with rcu_read_lock() */ |
1da177e4 LT |
1235 | int igmp6_event_report(struct sk_buff *skb) |
1236 | { | |
1237 | struct ifmcaddr6 *ma; | |
1da177e4 | 1238 | struct inet6_dev *idev; |
6e7cb837 | 1239 | struct mld_msg *mld; |
1da177e4 LT |
1240 | int addr_type; |
1241 | ||
1242 | /* Our own report looped back. Ignore it. */ | |
1243 | if (skb->pkt_type == PACKET_LOOPBACK) | |
1244 | return 0; | |
1245 | ||
24c69275 DS |
1246 | /* send our report if the MC router may not have heard this report */ |
1247 | if (skb->pkt_type != PACKET_MULTICAST && | |
1248 | skb->pkt_type != PACKET_BROADCAST) | |
1249 | return 0; | |
1250 | ||
6e7cb837 | 1251 | if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr))) |
1da177e4 LT |
1252 | return -EINVAL; |
1253 | ||
6e7cb837 | 1254 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1da177e4 LT |
1255 | |
1256 | /* Drop reports with not link local source */ | |
0660e03f | 1257 | addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr); |
1ab1457c | 1258 | if (addr_type != IPV6_ADDR_ANY && |
1da177e4 LT |
1259 | !(addr_type&IPV6_ADDR_LINKLOCAL)) |
1260 | return -EINVAL; | |
1261 | ||
96b52e61 | 1262 | idev = __in6_dev_get(skb->dev); |
1da177e4 LT |
1263 | if (idev == NULL) |
1264 | return -ENODEV; | |
1265 | ||
1266 | /* | |
1267 | * Cancel the timer for this group | |
1268 | */ | |
1269 | ||
1270 | read_lock_bh(&idev->lock); | |
1271 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
6e7cb837 | 1272 | if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) { |
1da177e4 LT |
1273 | spin_lock(&ma->mca_lock); |
1274 | if (del_timer(&ma->mca_timer)) | |
1275 | atomic_dec(&ma->mca_refcnt); | |
1276 | ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING); | |
1277 | spin_unlock(&ma->mca_lock); | |
1278 | break; | |
1279 | } | |
1280 | } | |
1281 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
1282 | return 0; |
1283 | } | |
1284 | ||
a50feda5 ED |
1285 | static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type, |
1286 | int gdeleted, int sdeleted) | |
1da177e4 LT |
1287 | { |
1288 | switch (type) { | |
1289 | case MLD2_MODE_IS_INCLUDE: | |
1290 | case MLD2_MODE_IS_EXCLUDE: | |
1291 | if (gdeleted || sdeleted) | |
a50feda5 | 1292 | return false; |
5ab4a6c8 DS |
1293 | if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) { |
1294 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
a50feda5 | 1295 | return true; |
5ab4a6c8 DS |
1296 | /* don't include if this source is excluded |
1297 | * in all filters | |
1298 | */ | |
1299 | if (psf->sf_count[MCAST_INCLUDE]) | |
7add2a43 | 1300 | return type == MLD2_MODE_IS_INCLUDE; |
5ab4a6c8 DS |
1301 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1302 | psf->sf_count[MCAST_EXCLUDE]; | |
1303 | } | |
a50feda5 | 1304 | return false; |
1da177e4 LT |
1305 | case MLD2_CHANGE_TO_INCLUDE: |
1306 | if (gdeleted || sdeleted) | |
a50feda5 | 1307 | return false; |
1da177e4 LT |
1308 | return psf->sf_count[MCAST_INCLUDE] != 0; |
1309 | case MLD2_CHANGE_TO_EXCLUDE: | |
1310 | if (gdeleted || sdeleted) | |
a50feda5 | 1311 | return false; |
1da177e4 LT |
1312 | if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 || |
1313 | psf->sf_count[MCAST_INCLUDE]) | |
a50feda5 | 1314 | return false; |
1da177e4 LT |
1315 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1316 | psf->sf_count[MCAST_EXCLUDE]; | |
1317 | case MLD2_ALLOW_NEW_SOURCES: | |
1318 | if (gdeleted || !psf->sf_crcount) | |
a50feda5 | 1319 | return false; |
1da177e4 LT |
1320 | return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted; |
1321 | case MLD2_BLOCK_OLD_SOURCES: | |
1322 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1323 | return gdeleted || (psf->sf_crcount && sdeleted); | |
1324 | return psf->sf_crcount && !gdeleted && !sdeleted; | |
1325 | } | |
a50feda5 | 1326 | return false; |
1da177e4 LT |
1327 | } |
1328 | ||
1329 | static int | |
1330 | mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted) | |
1331 | { | |
1332 | struct ip6_sf_list *psf; | |
1333 | int scount = 0; | |
1334 | ||
1335 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1336 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) | |
1337 | continue; | |
1338 | scount++; | |
1339 | } | |
1340 | return scount; | |
1341 | } | |
1342 | ||
2576f17d YH |
1343 | static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb, |
1344 | struct net_device *dev, | |
1345 | const struct in6_addr *saddr, | |
1346 | const struct in6_addr *daddr, | |
1347 | int proto, int len) | |
1348 | { | |
1349 | struct ipv6hdr *hdr; | |
1350 | ||
1351 | skb->protocol = htons(ETH_P_IPV6); | |
1352 | skb->dev = dev; | |
1353 | ||
1354 | skb_reset_network_header(skb); | |
1355 | skb_put(skb, sizeof(struct ipv6hdr)); | |
1356 | hdr = ipv6_hdr(skb); | |
1357 | ||
1358 | ip6_flow_hdr(hdr, 0, 0); | |
1359 | ||
1360 | hdr->payload_len = htons(len); | |
1361 | hdr->nexthdr = proto; | |
1362 | hdr->hop_limit = inet6_sk(sk)->hop_limit; | |
1363 | ||
1364 | hdr->saddr = *saddr; | |
1365 | hdr->daddr = *daddr; | |
1366 | } | |
1367 | ||
8965779d | 1368 | static struct sk_buff *mld_newpack(struct inet6_dev *idev, int size) |
1da177e4 | 1369 | { |
8965779d | 1370 | struct net_device *dev = idev->dev; |
c346dca1 | 1371 | struct net *net = dev_net(dev); |
b8ad0cbc | 1372 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 LT |
1373 | struct sk_buff *skb; |
1374 | struct mld2_report *pmr; | |
1375 | struct in6_addr addr_buf; | |
d7aabf22 | 1376 | const struct in6_addr *saddr; |
a7ae1992 HX |
1377 | int hlen = LL_RESERVED_SPACE(dev); |
1378 | int tlen = dev->needed_tailroom; | |
1da177e4 LT |
1379 | int err; |
1380 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1381 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1382 | IPV6_TLV_PADN, 0 }; | |
1383 | ||
1384 | /* we assume size > sizeof(ra) here */ | |
a7ae1992 | 1385 | size += hlen + tlen; |
72e09ad1 ED |
1386 | /* limit our allocations to order-0 page */ |
1387 | size = min_t(int, size, SKB_MAX_ORDER(0, 0)); | |
1388 | skb = sock_alloc_send_skb(sk, size, 1, &err); | |
1da177e4 | 1389 | |
cfcabdcc | 1390 | if (!skb) |
1da177e4 LT |
1391 | return NULL; |
1392 | ||
9d4a0314 | 1393 | skb->priority = TC_PRIO_CONTROL; |
a7ae1992 | 1394 | skb_reserve(skb, hlen); |
1da177e4 | 1395 | |
8965779d | 1396 | if (__ipv6_get_lladdr(idev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1397 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1398 | * use unspecified address as the source address |
1da177e4 LT |
1399 | * when a valid link-local address is not available. |
1400 | */ | |
d7aabf22 YH |
1401 | saddr = &in6addr_any; |
1402 | } else | |
1403 | saddr = &addr_buf; | |
1da177e4 | 1404 | |
2576f17d | 1405 | ip6_mc_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0); |
1da177e4 LT |
1406 | |
1407 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1408 | ||
27a884dc | 1409 | skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data); |
d10ba34b ACM |
1410 | skb_put(skb, sizeof(*pmr)); |
1411 | pmr = (struct mld2_report *)skb_transport_header(skb); | |
6e7cb837 YH |
1412 | pmr->mld2r_type = ICMPV6_MLD2_REPORT; |
1413 | pmr->mld2r_resv1 = 0; | |
1414 | pmr->mld2r_cksum = 0; | |
1415 | pmr->mld2r_resv2 = 0; | |
1416 | pmr->mld2r_ngrec = 0; | |
1da177e4 LT |
1417 | return skb; |
1418 | } | |
1419 | ||
1420 | static void mld_sendpack(struct sk_buff *skb) | |
1421 | { | |
0660e03f | 1422 | struct ipv6hdr *pip6 = ipv6_hdr(skb); |
9c70220b ACM |
1423 | struct mld2_report *pmr = |
1424 | (struct mld2_report *)skb_transport_header(skb); | |
1da177e4 | 1425 | int payload_len, mldlen; |
96b52e61 | 1426 | struct inet6_dev *idev; |
c346dca1 | 1427 | struct net *net = dev_net(skb->dev); |
1da177e4 | 1428 | int err; |
4c9483b2 | 1429 | struct flowi6 fl6; |
adf30907 | 1430 | struct dst_entry *dst; |
1da177e4 | 1431 | |
96b52e61 ED |
1432 | rcu_read_lock(); |
1433 | idev = __in6_dev_get(skb->dev); | |
edf391ff NH |
1434 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len); |
1435 | ||
29a3cad5 SH |
1436 | payload_len = (skb_tail_pointer(skb) - skb_network_header(skb)) - |
1437 | sizeof(*pip6); | |
1438 | mldlen = skb_tail_pointer(skb) - skb_transport_header(skb); | |
1da177e4 LT |
1439 | pip6->payload_len = htons(payload_len); |
1440 | ||
6e7cb837 YH |
1441 | pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen, |
1442 | IPPROTO_ICMPV6, | |
1443 | csum_partial(skb_transport_header(skb), | |
1444 | mldlen, 0)); | |
41927178 | 1445 | |
4c9483b2 | 1446 | icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT, |
41927178 YH |
1447 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1448 | skb->dev->ifindex); | |
12fd84f4 | 1449 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
41927178 | 1450 | |
452edd59 DM |
1451 | err = 0; |
1452 | if (IS_ERR(dst)) { | |
1453 | err = PTR_ERR(dst); | |
1454 | dst = NULL; | |
1455 | } | |
adf30907 | 1456 | skb_dst_set(skb, dst); |
41927178 YH |
1457 | if (err) |
1458 | goto err_out; | |
1459 | ||
edf391ff NH |
1460 | payload_len = skb->len; |
1461 | ||
b2e0b385 | 1462 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
41927178 YH |
1463 | dst_output); |
1464 | out: | |
1da177e4 | 1465 | if (!err) { |
5a57d4c7 | 1466 | ICMP6MSGOUT_INC_STATS_BH(net, idev, ICMPV6_MLD2_REPORT); |
e41b5368 | 1467 | ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS); |
edf391ff | 1468 | IP6_UPD_PO_STATS_BH(net, idev, IPSTATS_MIB_OUTMCAST, payload_len); |
1da177e4 | 1469 | } else |
483a47d2 | 1470 | IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 | 1471 | |
96b52e61 | 1472 | rcu_read_unlock(); |
41927178 YH |
1473 | return; |
1474 | ||
1475 | err_out: | |
1476 | kfree_skb(skb); | |
1477 | goto out; | |
1da177e4 LT |
1478 | } |
1479 | ||
1480 | static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel) | |
1481 | { | |
fab10fe3 | 1482 | return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel); |
1da177e4 LT |
1483 | } |
1484 | ||
1485 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1486 | int type, struct mld2_grec **ppgr) | |
1487 | { | |
1488 | struct net_device *dev = pmc->idev->dev; | |
1489 | struct mld2_report *pmr; | |
1490 | struct mld2_grec *pgr; | |
1491 | ||
1492 | if (!skb) | |
8965779d | 1493 | skb = mld_newpack(pmc->idev, dev->mtu); |
1da177e4 LT |
1494 | if (!skb) |
1495 | return NULL; | |
1496 | pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec)); | |
1497 | pgr->grec_type = type; | |
1498 | pgr->grec_auxwords = 0; | |
1499 | pgr->grec_nsrcs = 0; | |
1500 | pgr->grec_mca = pmc->mca_addr; /* structure copy */ | |
9c70220b | 1501 | pmr = (struct mld2_report *)skb_transport_header(skb); |
6e7cb837 | 1502 | pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1); |
1da177e4 LT |
1503 | *ppgr = pgr; |
1504 | return skb; | |
1505 | } | |
1506 | ||
1507 | #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \ | |
1508 | skb_tailroom(skb)) : 0) | |
1509 | ||
1510 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1511 | int type, int gdeleted, int sdeleted) | |
1512 | { | |
8965779d AW |
1513 | struct inet6_dev *idev = pmc->idev; |
1514 | struct net_device *dev = idev->dev; | |
1da177e4 LT |
1515 | struct mld2_report *pmr; |
1516 | struct mld2_grec *pgr = NULL; | |
1517 | struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list; | |
5ab4a6c8 | 1518 | int scount, stotal, first, isquery, truncate; |
1da177e4 LT |
1519 | |
1520 | if (pmc->mca_flags & MAF_NOREPORT) | |
1521 | return skb; | |
1522 | ||
1523 | isquery = type == MLD2_MODE_IS_INCLUDE || | |
1524 | type == MLD2_MODE_IS_EXCLUDE; | |
1525 | truncate = type == MLD2_MODE_IS_EXCLUDE || | |
1526 | type == MLD2_CHANGE_TO_EXCLUDE; | |
1527 | ||
5ab4a6c8 DS |
1528 | stotal = scount = 0; |
1529 | ||
1da177e4 LT |
1530 | psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources; |
1531 | ||
5ab4a6c8 DS |
1532 | if (!*psf_list) |
1533 | goto empty_source; | |
1534 | ||
9c70220b | 1535 | pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL; |
1da177e4 LT |
1536 | |
1537 | /* EX and TO_EX get a fresh packet, if needed */ | |
1538 | if (truncate) { | |
6e7cb837 | 1539 | if (pmr && pmr->mld2r_ngrec && |
1da177e4 LT |
1540 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { |
1541 | if (skb) | |
1542 | mld_sendpack(skb); | |
8965779d | 1543 | skb = mld_newpack(idev, dev->mtu); |
1da177e4 LT |
1544 | } |
1545 | } | |
1546 | first = 1; | |
1da177e4 LT |
1547 | psf_prev = NULL; |
1548 | for (psf=*psf_list; psf; psf=psf_next) { | |
1549 | struct in6_addr *psrc; | |
1550 | ||
1551 | psf_next = psf->sf_next; | |
1552 | ||
1553 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) { | |
1554 | psf_prev = psf; | |
1555 | continue; | |
1556 | } | |
1557 | ||
1558 | /* clear marks on query responses */ | |
1559 | if (isquery) | |
1560 | psf->sf_gsresp = 0; | |
1561 | ||
1562 | if (AVAILABLE(skb) < sizeof(*psrc) + | |
1563 | first*sizeof(struct mld2_grec)) { | |
1564 | if (truncate && !first) | |
1565 | break; /* truncate these */ | |
1566 | if (pgr) | |
1567 | pgr->grec_nsrcs = htons(scount); | |
1568 | if (skb) | |
1569 | mld_sendpack(skb); | |
8965779d | 1570 | skb = mld_newpack(idev, dev->mtu); |
1da177e4 LT |
1571 | first = 1; |
1572 | scount = 0; | |
1573 | } | |
1574 | if (first) { | |
1575 | skb = add_grhead(skb, pmc, type, &pgr); | |
1576 | first = 0; | |
1577 | } | |
cc63f70b AD |
1578 | if (!skb) |
1579 | return NULL; | |
1da177e4 LT |
1580 | psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc)); |
1581 | *psrc = psf->sf_addr; | |
5ab4a6c8 | 1582 | scount++; stotal++; |
1da177e4 LT |
1583 | if ((type == MLD2_ALLOW_NEW_SOURCES || |
1584 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) { | |
1585 | psf->sf_crcount--; | |
1586 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { | |
1587 | if (psf_prev) | |
1588 | psf_prev->sf_next = psf->sf_next; | |
1589 | else | |
1590 | *psf_list = psf->sf_next; | |
1591 | kfree(psf); | |
1592 | continue; | |
1593 | } | |
1594 | } | |
1595 | psf_prev = psf; | |
1596 | } | |
5ab4a6c8 DS |
1597 | |
1598 | empty_source: | |
1599 | if (!stotal) { | |
1600 | if (type == MLD2_ALLOW_NEW_SOURCES || | |
1601 | type == MLD2_BLOCK_OLD_SOURCES) | |
1602 | return skb; | |
1603 | if (pmc->mca_crcount || isquery) { | |
1604 | /* make sure we have room for group header */ | |
1605 | if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) { | |
1606 | mld_sendpack(skb); | |
1607 | skb = NULL; /* add_grhead will get a new one */ | |
1608 | } | |
1609 | skb = add_grhead(skb, pmc, type, &pgr); | |
1610 | } | |
1611 | } | |
1da177e4 LT |
1612 | if (pgr) |
1613 | pgr->grec_nsrcs = htons(scount); | |
1614 | ||
1615 | if (isquery) | |
1616 | pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */ | |
1617 | return skb; | |
1618 | } | |
1619 | ||
1620 | static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc) | |
1621 | { | |
1622 | struct sk_buff *skb = NULL; | |
1623 | int type; | |
1624 | ||
8965779d | 1625 | read_lock_bh(&idev->lock); |
1da177e4 | 1626 | if (!pmc) { |
1da177e4 LT |
1627 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { |
1628 | if (pmc->mca_flags & MAF_NOREPORT) | |
1629 | continue; | |
1630 | spin_lock_bh(&pmc->mca_lock); | |
1631 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1632 | type = MLD2_MODE_IS_EXCLUDE; | |
1633 | else | |
1634 | type = MLD2_MODE_IS_INCLUDE; | |
1635 | skb = add_grec(skb, pmc, type, 0, 0); | |
1636 | spin_unlock_bh(&pmc->mca_lock); | |
1637 | } | |
1da177e4 LT |
1638 | } else { |
1639 | spin_lock_bh(&pmc->mca_lock); | |
1640 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1641 | type = MLD2_MODE_IS_EXCLUDE; | |
1642 | else | |
1643 | type = MLD2_MODE_IS_INCLUDE; | |
1644 | skb = add_grec(skb, pmc, type, 0, 0); | |
1645 | spin_unlock_bh(&pmc->mca_lock); | |
1646 | } | |
8965779d | 1647 | read_unlock_bh(&idev->lock); |
1da177e4 LT |
1648 | if (skb) |
1649 | mld_sendpack(skb); | |
1650 | } | |
1651 | ||
1652 | /* | |
1653 | * remove zero-count source records from a source filter list | |
1654 | */ | |
1655 | static void mld_clear_zeros(struct ip6_sf_list **ppsf) | |
1656 | { | |
1657 | struct ip6_sf_list *psf_prev, *psf_next, *psf; | |
1658 | ||
1659 | psf_prev = NULL; | |
1660 | for (psf=*ppsf; psf; psf = psf_next) { | |
1661 | psf_next = psf->sf_next; | |
1662 | if (psf->sf_crcount == 0) { | |
1663 | if (psf_prev) | |
1664 | psf_prev->sf_next = psf->sf_next; | |
1665 | else | |
1666 | *ppsf = psf->sf_next; | |
1667 | kfree(psf); | |
1668 | } else | |
1669 | psf_prev = psf; | |
1670 | } | |
1671 | } | |
1672 | ||
1673 | static void mld_send_cr(struct inet6_dev *idev) | |
1674 | { | |
1675 | struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next; | |
1676 | struct sk_buff *skb = NULL; | |
1677 | int type, dtype; | |
1678 | ||
1679 | read_lock_bh(&idev->lock); | |
6457d26b | 1680 | spin_lock(&idev->mc_lock); |
1da177e4 LT |
1681 | |
1682 | /* deleted MCA's */ | |
1683 | pmc_prev = NULL; | |
1684 | for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) { | |
1685 | pmc_next = pmc->next; | |
1686 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
1687 | type = MLD2_BLOCK_OLD_SOURCES; | |
1688 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1689 | skb = add_grec(skb, pmc, type, 1, 0); | |
1690 | skb = add_grec(skb, pmc, dtype, 1, 1); | |
1691 | } | |
1692 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1693 | if (pmc->mca_sfmode == MCAST_EXCLUDE) { |
1694 | type = MLD2_CHANGE_TO_INCLUDE; | |
1695 | skb = add_grec(skb, pmc, type, 1, 0); | |
1696 | } | |
5ab4a6c8 | 1697 | pmc->mca_crcount--; |
1da177e4 LT |
1698 | if (pmc->mca_crcount == 0) { |
1699 | mld_clear_zeros(&pmc->mca_tomb); | |
1700 | mld_clear_zeros(&pmc->mca_sources); | |
1701 | } | |
1702 | } | |
1703 | if (pmc->mca_crcount == 0 && !pmc->mca_tomb && | |
1704 | !pmc->mca_sources) { | |
1705 | if (pmc_prev) | |
1706 | pmc_prev->next = pmc_next; | |
1707 | else | |
1708 | idev->mc_tomb = pmc_next; | |
1709 | in6_dev_put(pmc->idev); | |
1710 | kfree(pmc); | |
1711 | } else | |
1712 | pmc_prev = pmc; | |
1713 | } | |
6457d26b | 1714 | spin_unlock(&idev->mc_lock); |
1da177e4 LT |
1715 | |
1716 | /* change recs */ | |
1717 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1718 | spin_lock_bh(&pmc->mca_lock); | |
1719 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1720 | type = MLD2_BLOCK_OLD_SOURCES; | |
1721 | dtype = MLD2_ALLOW_NEW_SOURCES; | |
1722 | } else { | |
1723 | type = MLD2_ALLOW_NEW_SOURCES; | |
1724 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1725 | } | |
1726 | skb = add_grec(skb, pmc, type, 0, 0); | |
1727 | skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */ | |
1728 | ||
1729 | /* filter mode changes */ | |
1730 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1731 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
1732 | type = MLD2_CHANGE_TO_EXCLUDE; | |
1733 | else | |
1734 | type = MLD2_CHANGE_TO_INCLUDE; | |
1735 | skb = add_grec(skb, pmc, type, 0, 0); | |
5ab4a6c8 | 1736 | pmc->mca_crcount--; |
1da177e4 LT |
1737 | } |
1738 | spin_unlock_bh(&pmc->mca_lock); | |
1739 | } | |
1740 | read_unlock_bh(&idev->lock); | |
1741 | if (!skb) | |
1742 | return; | |
1743 | (void) mld_sendpack(skb); | |
1744 | } | |
1745 | ||
1746 | static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type) | |
1747 | { | |
c346dca1 | 1748 | struct net *net = dev_net(dev); |
b8ad0cbc | 1749 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 | 1750 | struct inet6_dev *idev; |
1ab1457c | 1751 | struct sk_buff *skb; |
6e7cb837 | 1752 | struct mld_msg *hdr; |
d7aabf22 | 1753 | const struct in6_addr *snd_addr, *saddr; |
1da177e4 | 1754 | struct in6_addr addr_buf; |
a7ae1992 HX |
1755 | int hlen = LL_RESERVED_SPACE(dev); |
1756 | int tlen = dev->needed_tailroom; | |
1da177e4 LT |
1757 | int err, len, payload_len, full_len; |
1758 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1759 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1760 | IPV6_TLV_PADN, 0 }; | |
4c9483b2 | 1761 | struct flowi6 fl6; |
adf30907 | 1762 | struct dst_entry *dst; |
1da177e4 | 1763 | |
f3ee4010 YH |
1764 | if (type == ICMPV6_MGM_REDUCTION) |
1765 | snd_addr = &in6addr_linklocal_allrouters; | |
1766 | else | |
1767 | snd_addr = addr; | |
1da177e4 LT |
1768 | |
1769 | len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); | |
1770 | payload_len = len + sizeof(ra); | |
1771 | full_len = sizeof(struct ipv6hdr) + payload_len; | |
1772 | ||
edf391ff NH |
1773 | rcu_read_lock(); |
1774 | IP6_UPD_PO_STATS(net, __in6_dev_get(dev), | |
1775 | IPSTATS_MIB_OUT, full_len); | |
1776 | rcu_read_unlock(); | |
1777 | ||
a7ae1992 | 1778 | skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err); |
1da177e4 LT |
1779 | |
1780 | if (skb == NULL) { | |
a11d206d | 1781 | rcu_read_lock(); |
3bd653c8 | 1782 | IP6_INC_STATS(net, __in6_dev_get(dev), |
a11d206d YH |
1783 | IPSTATS_MIB_OUTDISCARDS); |
1784 | rcu_read_unlock(); | |
1da177e4 LT |
1785 | return; |
1786 | } | |
9d4a0314 | 1787 | skb->priority = TC_PRIO_CONTROL; |
a7ae1992 | 1788 | skb_reserve(skb, hlen); |
1da177e4 | 1789 | |
95c385b4 | 1790 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1791 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1792 | * use unspecified address as the source address |
1da177e4 LT |
1793 | * when a valid link-local address is not available. |
1794 | */ | |
d7aabf22 YH |
1795 | saddr = &in6addr_any; |
1796 | } else | |
1797 | saddr = &addr_buf; | |
1da177e4 | 1798 | |
2576f17d | 1799 | ip6_mc_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len); |
1da177e4 LT |
1800 | |
1801 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1802 | ||
6e7cb837 YH |
1803 | hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg)); |
1804 | memset(hdr, 0, sizeof(struct mld_msg)); | |
1805 | hdr->mld_type = type; | |
4e3fd7a0 | 1806 | hdr->mld_mca = *addr; |
1da177e4 | 1807 | |
6e7cb837 YH |
1808 | hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len, |
1809 | IPPROTO_ICMPV6, | |
1810 | csum_partial(hdr, len, 0)); | |
1da177e4 | 1811 | |
96b52e61 ED |
1812 | rcu_read_lock(); |
1813 | idev = __in6_dev_get(skb->dev); | |
1da177e4 | 1814 | |
4c9483b2 | 1815 | icmpv6_flow_init(sk, &fl6, type, |
41927178 YH |
1816 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1817 | skb->dev->ifindex); | |
12fd84f4 | 1818 | dst = icmp6_dst_alloc(skb->dev, &fl6); |
452edd59 DM |
1819 | if (IS_ERR(dst)) { |
1820 | err = PTR_ERR(dst); | |
41927178 | 1821 | goto err_out; |
452edd59 | 1822 | } |
41927178 | 1823 | |
adf30907 | 1824 | skb_dst_set(skb, dst); |
b2e0b385 | 1825 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
41927178 YH |
1826 | dst_output); |
1827 | out: | |
1da177e4 | 1828 | if (!err) { |
5c5d244b | 1829 | ICMP6MSGOUT_INC_STATS(net, idev, type); |
a862f6a6 | 1830 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); |
edf391ff | 1831 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len); |
1da177e4 | 1832 | } else |
3bd653c8 | 1833 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 | 1834 | |
96b52e61 | 1835 | rcu_read_unlock(); |
1da177e4 | 1836 | return; |
41927178 YH |
1837 | |
1838 | err_out: | |
1839 | kfree_skb(skb); | |
1840 | goto out; | |
1da177e4 LT |
1841 | } |
1842 | ||
b173ee48 HFS |
1843 | static void mld_resend_report(struct inet6_dev *idev) |
1844 | { | |
1845 | if (MLD_V1_SEEN(idev)) { | |
1846 | struct ifmcaddr6 *mcaddr; | |
1847 | read_lock_bh(&idev->lock); | |
1848 | for (mcaddr = idev->mc_list; mcaddr; mcaddr = mcaddr->next) { | |
1849 | if (!(mcaddr->mca_flags & MAF_NOREPORT)) | |
1850 | igmp6_send(&mcaddr->mca_addr, idev->dev, | |
1851 | ICMPV6_MGM_REPORT); | |
1852 | } | |
1853 | read_unlock_bh(&idev->lock); | |
1854 | } else { | |
1855 | mld_send_report(idev, NULL); | |
1856 | } | |
1857 | } | |
1858 | ||
1859 | void ipv6_mc_dad_complete(struct inet6_dev *idev) | |
1860 | { | |
1861 | idev->mc_dad_count = idev->mc_qrv; | |
1862 | if (idev->mc_dad_count) { | |
1863 | mld_resend_report(idev); | |
1864 | idev->mc_dad_count--; | |
1865 | if (idev->mc_dad_count) | |
1866 | mld_dad_start_timer(idev, idev->mc_maxdelay); | |
1867 | } | |
1868 | } | |
1869 | ||
1870 | static void mld_dad_timer_expire(unsigned long data) | |
1871 | { | |
1872 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
1873 | ||
1874 | mld_resend_report(idev); | |
1875 | if (idev->mc_dad_count) { | |
1876 | idev->mc_dad_count--; | |
1877 | if (idev->mc_dad_count) | |
1878 | mld_dad_start_timer(idev, idev->mc_maxdelay); | |
1879 | } | |
1880 | __in6_dev_put(idev); | |
1881 | } | |
1882 | ||
1da177e4 | 1883 | static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode, |
b71d1d42 | 1884 | const struct in6_addr *psfsrc) |
1da177e4 LT |
1885 | { |
1886 | struct ip6_sf_list *psf, *psf_prev; | |
1887 | int rv = 0; | |
1888 | ||
1889 | psf_prev = NULL; | |
1890 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1891 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) | |
1892 | break; | |
1893 | psf_prev = psf; | |
1894 | } | |
1895 | if (!psf || psf->sf_count[sfmode] == 0) { | |
1896 | /* source filter not found, or count wrong => bug */ | |
1897 | return -ESRCH; | |
1898 | } | |
1899 | psf->sf_count[sfmode]--; | |
1900 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { | |
1901 | struct inet6_dev *idev = pmc->idev; | |
1902 | ||
1903 | /* no more filters for this source */ | |
1904 | if (psf_prev) | |
1905 | psf_prev->sf_next = psf->sf_next; | |
1906 | else | |
1907 | pmc->mca_sources = psf->sf_next; | |
1908 | if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) && | |
1909 | !MLD_V1_SEEN(idev)) { | |
1910 | psf->sf_crcount = idev->mc_qrv; | |
1911 | psf->sf_next = pmc->mca_tomb; | |
1912 | pmc->mca_tomb = psf; | |
1913 | rv = 1; | |
1914 | } else | |
1915 | kfree(psf); | |
1916 | } | |
1917 | return rv; | |
1918 | } | |
1919 | ||
b71d1d42 ED |
1920 | static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
1921 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
1922 | int delta) |
1923 | { | |
1924 | struct ifmcaddr6 *pmc; | |
1925 | int changerec = 0; | |
1926 | int i, err; | |
1927 | ||
1928 | if (!idev) | |
1929 | return -ENODEV; | |
1930 | read_lock_bh(&idev->lock); | |
1931 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1932 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) | |
1933 | break; | |
1934 | } | |
1935 | if (!pmc) { | |
1936 | /* MCA not found?? bug */ | |
1937 | read_unlock_bh(&idev->lock); | |
1938 | return -ESRCH; | |
1939 | } | |
1940 | spin_lock_bh(&pmc->mca_lock); | |
1941 | sf_markstate(pmc); | |
1942 | if (!delta) { | |
1943 | if (!pmc->mca_sfcount[sfmode]) { | |
1944 | spin_unlock_bh(&pmc->mca_lock); | |
1945 | read_unlock_bh(&idev->lock); | |
1946 | return -EINVAL; | |
1947 | } | |
1948 | pmc->mca_sfcount[sfmode]--; | |
1949 | } | |
1950 | err = 0; | |
1951 | for (i=0; i<sfcount; i++) { | |
1952 | int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); | |
1953 | ||
1954 | changerec |= rv > 0; | |
1955 | if (!err && rv < 0) | |
1956 | err = rv; | |
1957 | } | |
1958 | if (pmc->mca_sfmode == MCAST_EXCLUDE && | |
1959 | pmc->mca_sfcount[MCAST_EXCLUDE] == 0 && | |
1960 | pmc->mca_sfcount[MCAST_INCLUDE]) { | |
1961 | struct ip6_sf_list *psf; | |
1962 | ||
1963 | /* filter mode change */ | |
1964 | pmc->mca_sfmode = MCAST_INCLUDE; | |
1965 | pmc->mca_crcount = idev->mc_qrv; | |
1966 | idev->mc_ifc_count = pmc->mca_crcount; | |
1967 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) | |
1968 | psf->sf_crcount = 0; | |
1969 | mld_ifc_event(pmc->idev); | |
1970 | } else if (sf_setstate(pmc) || changerec) | |
1971 | mld_ifc_event(pmc->idev); | |
1972 | spin_unlock_bh(&pmc->mca_lock); | |
1973 | read_unlock_bh(&idev->lock); | |
1974 | return err; | |
1975 | } | |
1976 | ||
1977 | /* | |
1978 | * Add multicast single-source filter to the interface list | |
1979 | */ | |
1980 | static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode, | |
99d2f47a | 1981 | const struct in6_addr *psfsrc) |
1da177e4 LT |
1982 | { |
1983 | struct ip6_sf_list *psf, *psf_prev; | |
1984 | ||
1985 | psf_prev = NULL; | |
1986 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1987 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) | |
1988 | break; | |
1989 | psf_prev = psf; | |
1990 | } | |
1991 | if (!psf) { | |
0c600eda | 1992 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
1da177e4 LT |
1993 | if (!psf) |
1994 | return -ENOBUFS; | |
0c600eda | 1995 | |
1da177e4 LT |
1996 | psf->sf_addr = *psfsrc; |
1997 | if (psf_prev) { | |
1998 | psf_prev->sf_next = psf; | |
1999 | } else | |
2000 | pmc->mca_sources = psf; | |
2001 | } | |
2002 | psf->sf_count[sfmode]++; | |
2003 | return 0; | |
2004 | } | |
2005 | ||
2006 | static void sf_markstate(struct ifmcaddr6 *pmc) | |
2007 | { | |
2008 | struct ip6_sf_list *psf; | |
2009 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; | |
2010 | ||
2011 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) | |
2012 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
2013 | psf->sf_oldin = mca_xcount == | |
2014 | psf->sf_count[MCAST_EXCLUDE] && | |
2015 | !psf->sf_count[MCAST_INCLUDE]; | |
2016 | } else | |
2017 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; | |
2018 | } | |
2019 | ||
2020 | static int sf_setstate(struct ifmcaddr6 *pmc) | |
2021 | { | |
7add2a43 | 2022 | struct ip6_sf_list *psf, *dpsf; |
1da177e4 LT |
2023 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
2024 | int qrv = pmc->idev->mc_qrv; | |
2025 | int new_in, rv; | |
2026 | ||
2027 | rv = 0; | |
2028 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
2029 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
2030 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && | |
2031 | !psf->sf_count[MCAST_INCLUDE]; | |
2032 | } else | |
2033 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; | |
7add2a43 DS |
2034 | if (new_in) { |
2035 | if (!psf->sf_oldin) { | |
e80e28b6 | 2036 | struct ip6_sf_list *prev = NULL; |
7add2a43 DS |
2037 | |
2038 | for (dpsf=pmc->mca_tomb; dpsf; | |
2039 | dpsf=dpsf->sf_next) { | |
2040 | if (ipv6_addr_equal(&dpsf->sf_addr, | |
2041 | &psf->sf_addr)) | |
2042 | break; | |
2043 | prev = dpsf; | |
2044 | } | |
2045 | if (dpsf) { | |
2046 | if (prev) | |
2047 | prev->sf_next = dpsf->sf_next; | |
2048 | else | |
2049 | pmc->mca_tomb = dpsf->sf_next; | |
2050 | kfree(dpsf); | |
2051 | } | |
2052 | psf->sf_crcount = qrv; | |
2053 | rv++; | |
2054 | } | |
2055 | } else if (psf->sf_oldin) { | |
2056 | psf->sf_crcount = 0; | |
2057 | /* | |
2058 | * add or update "delete" records if an active filter | |
2059 | * is now inactive | |
2060 | */ | |
2061 | for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next) | |
2062 | if (ipv6_addr_equal(&dpsf->sf_addr, | |
2063 | &psf->sf_addr)) | |
2064 | break; | |
2065 | if (!dpsf) { | |
5d55354f | 2066 | dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC); |
7add2a43 DS |
2067 | if (!dpsf) |
2068 | continue; | |
2069 | *dpsf = *psf; | |
2070 | /* pmc->mca_lock held by callers */ | |
2071 | dpsf->sf_next = pmc->mca_tomb; | |
2072 | pmc->mca_tomb = dpsf; | |
2073 | } | |
2074 | dpsf->sf_crcount = qrv; | |
1da177e4 LT |
2075 | rv++; |
2076 | } | |
2077 | } | |
2078 | return rv; | |
2079 | } | |
2080 | ||
2081 | /* | |
2082 | * Add multicast source filter list to the interface list | |
2083 | */ | |
b71d1d42 ED |
2084 | static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca, |
2085 | int sfmode, int sfcount, const struct in6_addr *psfsrc, | |
1da177e4 LT |
2086 | int delta) |
2087 | { | |
2088 | struct ifmcaddr6 *pmc; | |
2089 | int isexclude; | |
2090 | int i, err; | |
2091 | ||
2092 | if (!idev) | |
2093 | return -ENODEV; | |
2094 | read_lock_bh(&idev->lock); | |
2095 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
2096 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) | |
2097 | break; | |
2098 | } | |
2099 | if (!pmc) { | |
2100 | /* MCA not found?? bug */ | |
2101 | read_unlock_bh(&idev->lock); | |
2102 | return -ESRCH; | |
2103 | } | |
2104 | spin_lock_bh(&pmc->mca_lock); | |
2105 | ||
2106 | sf_markstate(pmc); | |
2107 | isexclude = pmc->mca_sfmode == MCAST_EXCLUDE; | |
2108 | if (!delta) | |
2109 | pmc->mca_sfcount[sfmode]++; | |
2110 | err = 0; | |
2111 | for (i=0; i<sfcount; i++) { | |
99d2f47a | 2112 | err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]); |
1da177e4 LT |
2113 | if (err) |
2114 | break; | |
2115 | } | |
2116 | if (err) { | |
2117 | int j; | |
2118 | ||
2119 | if (!delta) | |
2120 | pmc->mca_sfcount[sfmode]--; | |
2121 | for (j=0; j<i; j++) | |
78d50217 | 2122 | ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]); |
1da177e4 | 2123 | } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) { |
1da177e4 LT |
2124 | struct ip6_sf_list *psf; |
2125 | ||
2126 | /* filter mode change */ | |
2127 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2128 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
2129 | else if (pmc->mca_sfcount[MCAST_INCLUDE]) | |
2130 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2131 | /* else no filters; keep old mode for reports */ | |
2132 | ||
2133 | pmc->mca_crcount = idev->mc_qrv; | |
2134 | idev->mc_ifc_count = pmc->mca_crcount; | |
2135 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) | |
2136 | psf->sf_crcount = 0; | |
2137 | mld_ifc_event(idev); | |
2138 | } else if (sf_setstate(pmc)) | |
2139 | mld_ifc_event(idev); | |
2140 | spin_unlock_bh(&pmc->mca_lock); | |
2141 | read_unlock_bh(&idev->lock); | |
2142 | return err; | |
2143 | } | |
2144 | ||
2145 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc) | |
2146 | { | |
2147 | struct ip6_sf_list *psf, *nextpsf; | |
2148 | ||
2149 | for (psf=pmc->mca_tomb; psf; psf=nextpsf) { | |
2150 | nextpsf = psf->sf_next; | |
2151 | kfree(psf); | |
2152 | } | |
2153 | pmc->mca_tomb = NULL; | |
2154 | for (psf=pmc->mca_sources; psf; psf=nextpsf) { | |
2155 | nextpsf = psf->sf_next; | |
2156 | kfree(psf); | |
2157 | } | |
2158 | pmc->mca_sources = NULL; | |
2159 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
de9daad9 | 2160 | pmc->mca_sfcount[MCAST_INCLUDE] = 0; |
1da177e4 LT |
2161 | pmc->mca_sfcount[MCAST_EXCLUDE] = 1; |
2162 | } | |
2163 | ||
2164 | ||
2165 | static void igmp6_join_group(struct ifmcaddr6 *ma) | |
2166 | { | |
2167 | unsigned long delay; | |
2168 | ||
2169 | if (ma->mca_flags & MAF_NOREPORT) | |
2170 | return; | |
2171 | ||
2172 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2173 | ||
fc4eba58 | 2174 | delay = net_random() % unsolicited_report_interval(ma->idev); |
1da177e4 LT |
2175 | |
2176 | spin_lock_bh(&ma->mca_lock); | |
2177 | if (del_timer(&ma->mca_timer)) { | |
2178 | atomic_dec(&ma->mca_refcnt); | |
2179 | delay = ma->mca_timer.expires - jiffies; | |
2180 | } | |
2181 | ||
2182 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
2183 | atomic_inc(&ma->mca_refcnt); | |
2184 | ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER; | |
2185 | spin_unlock_bh(&ma->mca_lock); | |
2186 | } | |
2187 | ||
2188 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
2189 | struct inet6_dev *idev) | |
2190 | { | |
2191 | int err; | |
2192 | ||
5ab4a6c8 DS |
2193 | /* callers have the socket lock and a write lock on ipv6_sk_mc_lock, |
2194 | * so no other readers or writers of iml or its sflist | |
2195 | */ | |
cfcabdcc | 2196 | if (!iml->sflist) { |
1da177e4 LT |
2197 | /* any-source empty exclude case */ |
2198 | return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0); | |
2199 | } | |
2200 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, | |
2201 | iml->sflist->sl_count, iml->sflist->sl_addr, 0); | |
2202 | sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max)); | |
2203 | iml->sflist = NULL; | |
2204 | return err; | |
2205 | } | |
2206 | ||
2207 | static void igmp6_leave_group(struct ifmcaddr6 *ma) | |
2208 | { | |
2209 | if (MLD_V1_SEEN(ma->idev)) { | |
2210 | if (ma->mca_flags & MAF_LAST_REPORTER) | |
2211 | igmp6_send(&ma->mca_addr, ma->idev->dev, | |
2212 | ICMPV6_MGM_REDUCTION); | |
2213 | } else { | |
2214 | mld_add_delrec(ma->idev, ma); | |
2215 | mld_ifc_event(ma->idev); | |
2216 | } | |
2217 | } | |
2218 | ||
2219 | static void mld_gq_timer_expire(unsigned long data) | |
2220 | { | |
2221 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2222 | ||
2223 | idev->mc_gq_running = 0; | |
2224 | mld_send_report(idev, NULL); | |
2225 | __in6_dev_put(idev); | |
2226 | } | |
2227 | ||
2228 | static void mld_ifc_timer_expire(unsigned long data) | |
2229 | { | |
2230 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2231 | ||
2232 | mld_send_cr(idev); | |
2233 | if (idev->mc_ifc_count) { | |
2234 | idev->mc_ifc_count--; | |
2235 | if (idev->mc_ifc_count) | |
2236 | mld_ifc_start_timer(idev, idev->mc_maxdelay); | |
2237 | } | |
2238 | __in6_dev_put(idev); | |
2239 | } | |
2240 | ||
2241 | static void mld_ifc_event(struct inet6_dev *idev) | |
2242 | { | |
2243 | if (MLD_V1_SEEN(idev)) | |
2244 | return; | |
2245 | idev->mc_ifc_count = idev->mc_qrv; | |
2246 | mld_ifc_start_timer(idev, 1); | |
2247 | } | |
2248 | ||
2249 | ||
2250 | static void igmp6_timer_handler(unsigned long data) | |
2251 | { | |
2252 | struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data; | |
2253 | ||
2254 | if (MLD_V1_SEEN(ma->idev)) | |
2255 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2256 | else | |
2257 | mld_send_report(ma->idev, ma); | |
2258 | ||
2259 | spin_lock(&ma->mca_lock); | |
2260 | ma->mca_flags |= MAF_LAST_REPORTER; | |
2261 | ma->mca_flags &= ~MAF_TIMER_RUNNING; | |
2262 | spin_unlock(&ma->mca_lock); | |
2263 | ma_put(ma); | |
2264 | } | |
2265 | ||
75c78500 MS |
2266 | /* Device changing type */ |
2267 | ||
2268 | void ipv6_mc_unmap(struct inet6_dev *idev) | |
2269 | { | |
2270 | struct ifmcaddr6 *i; | |
2271 | ||
2272 | /* Install multicast list, except for all-nodes (already installed) */ | |
2273 | ||
2274 | read_lock_bh(&idev->lock); | |
2275 | for (i = idev->mc_list; i; i = i->next) | |
2276 | igmp6_group_dropped(i); | |
2277 | read_unlock_bh(&idev->lock); | |
2278 | } | |
2279 | ||
2280 | void ipv6_mc_remap(struct inet6_dev *idev) | |
2281 | { | |
2282 | ipv6_mc_up(idev); | |
2283 | } | |
2284 | ||
1da177e4 LT |
2285 | /* Device going down */ |
2286 | ||
2287 | void ipv6_mc_down(struct inet6_dev *idev) | |
2288 | { | |
2289 | struct ifmcaddr6 *i; | |
2290 | ||
2291 | /* Withdraw multicast list */ | |
2292 | ||
2293 | read_lock_bh(&idev->lock); | |
2294 | idev->mc_ifc_count = 0; | |
2295 | if (del_timer(&idev->mc_ifc_timer)) | |
2296 | __in6_dev_put(idev); | |
2297 | idev->mc_gq_running = 0; | |
2298 | if (del_timer(&idev->mc_gq_timer)) | |
2299 | __in6_dev_put(idev); | |
b173ee48 HFS |
2300 | if (del_timer(&idev->mc_dad_timer)) |
2301 | __in6_dev_put(idev); | |
1da177e4 LT |
2302 | |
2303 | for (i = idev->mc_list; i; i=i->next) | |
2304 | igmp6_group_dropped(i); | |
2305 | read_unlock_bh(&idev->lock); | |
2306 | ||
2307 | mld_clear_delrec(idev); | |
2308 | } | |
2309 | ||
2310 | ||
2311 | /* Device going up */ | |
2312 | ||
2313 | void ipv6_mc_up(struct inet6_dev *idev) | |
2314 | { | |
2315 | struct ifmcaddr6 *i; | |
2316 | ||
2317 | /* Install multicast list, except for all-nodes (already installed) */ | |
2318 | ||
2319 | read_lock_bh(&idev->lock); | |
2320 | for (i = idev->mc_list; i; i=i->next) | |
2321 | igmp6_group_added(i); | |
2322 | read_unlock_bh(&idev->lock); | |
2323 | } | |
2324 | ||
2325 | /* IPv6 device initialization. */ | |
2326 | ||
2327 | void ipv6_mc_init_dev(struct inet6_dev *idev) | |
2328 | { | |
1da177e4 | 2329 | write_lock_bh(&idev->lock); |
6457d26b | 2330 | spin_lock_init(&idev->mc_lock); |
1da177e4 | 2331 | idev->mc_gq_running = 0; |
b24b8a24 PE |
2332 | setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire, |
2333 | (unsigned long)idev); | |
1da177e4 LT |
2334 | idev->mc_tomb = NULL; |
2335 | idev->mc_ifc_count = 0; | |
b24b8a24 PE |
2336 | setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire, |
2337 | (unsigned long)idev); | |
b173ee48 HFS |
2338 | setup_timer(&idev->mc_dad_timer, mld_dad_timer_expire, |
2339 | (unsigned long)idev); | |
1da177e4 | 2340 | idev->mc_qrv = MLD_QRV_DEFAULT; |
fc4eba58 | 2341 | idev->mc_maxdelay = unsolicited_report_interval(idev); |
1da177e4 LT |
2342 | idev->mc_v1_seen = 0; |
2343 | write_unlock_bh(&idev->lock); | |
1da177e4 LT |
2344 | } |
2345 | ||
2346 | /* | |
2347 | * Device is about to be destroyed: clean up. | |
2348 | */ | |
2349 | ||
2350 | void ipv6_mc_destroy_dev(struct inet6_dev *idev) | |
2351 | { | |
2352 | struct ifmcaddr6 *i; | |
1da177e4 LT |
2353 | |
2354 | /* Deactivate timers */ | |
2355 | ipv6_mc_down(idev); | |
2356 | ||
2357 | /* Delete all-nodes address. */ | |
1da177e4 LT |
2358 | /* We cannot call ipv6_dev_mc_dec() directly, our caller in |
2359 | * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will | |
2360 | * fail. | |
2361 | */ | |
f3ee4010 | 2362 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes); |
1da177e4 | 2363 | |
f3ee4010 YH |
2364 | if (idev->cnf.forwarding) |
2365 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters); | |
1da177e4 LT |
2366 | |
2367 | write_lock_bh(&idev->lock); | |
2368 | while ((i = idev->mc_list) != NULL) { | |
2369 | idev->mc_list = i->next; | |
2370 | write_unlock_bh(&idev->lock); | |
2371 | ||
2372 | igmp6_group_dropped(i); | |
2373 | ma_put(i); | |
2374 | ||
2375 | write_lock_bh(&idev->lock); | |
2376 | } | |
2377 | write_unlock_bh(&idev->lock); | |
2378 | } | |
2379 | ||
2380 | #ifdef CONFIG_PROC_FS | |
2381 | struct igmp6_mc_iter_state { | |
b8ad0cbc | 2382 | struct seq_net_private p; |
1da177e4 LT |
2383 | struct net_device *dev; |
2384 | struct inet6_dev *idev; | |
2385 | }; | |
2386 | ||
2387 | #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private) | |
2388 | ||
2389 | static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq) | |
2390 | { | |
2391 | struct ifmcaddr6 *im = NULL; | |
2392 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
1218854a | 2393 | struct net *net = seq_file_net(seq); |
1da177e4 | 2394 | |
7562f876 | 2395 | state->idev = NULL; |
ce81b76a | 2396 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2397 | struct inet6_dev *idev; |
ce81b76a | 2398 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2399 | if (!idev) |
2400 | continue; | |
2401 | read_lock_bh(&idev->lock); | |
2402 | im = idev->mc_list; | |
2403 | if (im) { | |
2404 | state->idev = idev; | |
2405 | break; | |
2406 | } | |
2407 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2408 | } |
2409 | return im; | |
2410 | } | |
2411 | ||
2412 | static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im) | |
2413 | { | |
2414 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2415 | ||
2416 | im = im->next; | |
2417 | while (!im) { | |
ce81b76a | 2418 | if (likely(state->idev != NULL)) |
1da177e4 | 2419 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2420 | |
2421 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2422 | if (!state->dev) { |
2423 | state->idev = NULL; | |
2424 | break; | |
2425 | } | |
ce81b76a | 2426 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2427 | if (!state->idev) |
2428 | continue; | |
2429 | read_lock_bh(&state->idev->lock); | |
2430 | im = state->idev->mc_list; | |
2431 | } | |
2432 | return im; | |
2433 | } | |
2434 | ||
2435 | static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos) | |
2436 | { | |
2437 | struct ifmcaddr6 *im = igmp6_mc_get_first(seq); | |
2438 | if (im) | |
2439 | while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL) | |
2440 | --pos; | |
2441 | return pos ? NULL : im; | |
2442 | } | |
2443 | ||
2444 | static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2445 | __acquires(RCU) |
1da177e4 | 2446 | { |
ce81b76a | 2447 | rcu_read_lock(); |
1da177e4 LT |
2448 | return igmp6_mc_get_idx(seq, *pos); |
2449 | } | |
2450 | ||
2451 | static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2452 | { | |
ce81b76a ED |
2453 | struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v); |
2454 | ||
1da177e4 LT |
2455 | ++*pos; |
2456 | return im; | |
2457 | } | |
2458 | ||
2459 | static void igmp6_mc_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2460 | __releases(RCU) |
1da177e4 LT |
2461 | { |
2462 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
ce81b76a | 2463 | |
1da177e4 LT |
2464 | if (likely(state->idev != NULL)) { |
2465 | read_unlock_bh(&state->idev->lock); | |
1da177e4 LT |
2466 | state->idev = NULL; |
2467 | } | |
2468 | state->dev = NULL; | |
ce81b76a | 2469 | rcu_read_unlock(); |
1da177e4 LT |
2470 | } |
2471 | ||
2472 | static int igmp6_mc_seq_show(struct seq_file *seq, void *v) | |
2473 | { | |
2474 | struct ifmcaddr6 *im = (struct ifmcaddr6 *)v; | |
2475 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2476 | ||
2477 | seq_printf(seq, | |
4b7a4274 | 2478 | "%-4d %-15s %pi6 %5d %08X %ld\n", |
1da177e4 | 2479 | state->dev->ifindex, state->dev->name, |
b071195d | 2480 | &im->mca_addr, |
1da177e4 LT |
2481 | im->mca_users, im->mca_flags, |
2482 | (im->mca_flags&MAF_TIMER_RUNNING) ? | |
2483 | jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0); | |
2484 | return 0; | |
2485 | } | |
2486 | ||
56b3d975 | 2487 | static const struct seq_operations igmp6_mc_seq_ops = { |
1da177e4 LT |
2488 | .start = igmp6_mc_seq_start, |
2489 | .next = igmp6_mc_seq_next, | |
2490 | .stop = igmp6_mc_seq_stop, | |
2491 | .show = igmp6_mc_seq_show, | |
2492 | }; | |
2493 | ||
2494 | static int igmp6_mc_seq_open(struct inode *inode, struct file *file) | |
2495 | { | |
b8ad0cbc DL |
2496 | return seq_open_net(inode, file, &igmp6_mc_seq_ops, |
2497 | sizeof(struct igmp6_mc_iter_state)); | |
1da177e4 LT |
2498 | } |
2499 | ||
9a32144e | 2500 | static const struct file_operations igmp6_mc_seq_fops = { |
1da177e4 LT |
2501 | .owner = THIS_MODULE, |
2502 | .open = igmp6_mc_seq_open, | |
2503 | .read = seq_read, | |
2504 | .llseek = seq_lseek, | |
b8ad0cbc | 2505 | .release = seq_release_net, |
1da177e4 LT |
2506 | }; |
2507 | ||
2508 | struct igmp6_mcf_iter_state { | |
b8ad0cbc | 2509 | struct seq_net_private p; |
1da177e4 LT |
2510 | struct net_device *dev; |
2511 | struct inet6_dev *idev; | |
2512 | struct ifmcaddr6 *im; | |
2513 | }; | |
2514 | ||
2515 | #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private) | |
2516 | ||
2517 | static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq) | |
2518 | { | |
2519 | struct ip6_sf_list *psf = NULL; | |
2520 | struct ifmcaddr6 *im = NULL; | |
2521 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
1218854a | 2522 | struct net *net = seq_file_net(seq); |
1da177e4 | 2523 | |
7562f876 PE |
2524 | state->idev = NULL; |
2525 | state->im = NULL; | |
ce81b76a | 2526 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2527 | struct inet6_dev *idev; |
ce81b76a | 2528 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2529 | if (unlikely(idev == NULL)) |
2530 | continue; | |
2531 | read_lock_bh(&idev->lock); | |
2532 | im = idev->mc_list; | |
2533 | if (likely(im != NULL)) { | |
2534 | spin_lock_bh(&im->mca_lock); | |
2535 | psf = im->mca_sources; | |
2536 | if (likely(psf != NULL)) { | |
2537 | state->im = im; | |
2538 | state->idev = idev; | |
2539 | break; | |
2540 | } | |
2541 | spin_unlock_bh(&im->mca_lock); | |
2542 | } | |
2543 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2544 | } |
2545 | return psf; | |
2546 | } | |
2547 | ||
2548 | static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf) | |
2549 | { | |
2550 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2551 | ||
2552 | psf = psf->sf_next; | |
2553 | while (!psf) { | |
2554 | spin_unlock_bh(&state->im->mca_lock); | |
2555 | state->im = state->im->next; | |
2556 | while (!state->im) { | |
ce81b76a | 2557 | if (likely(state->idev != NULL)) |
1da177e4 | 2558 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2559 | |
2560 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2561 | if (!state->dev) { |
2562 | state->idev = NULL; | |
2563 | goto out; | |
2564 | } | |
ce81b76a | 2565 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2566 | if (!state->idev) |
2567 | continue; | |
2568 | read_lock_bh(&state->idev->lock); | |
2569 | state->im = state->idev->mc_list; | |
2570 | } | |
2571 | if (!state->im) | |
2572 | break; | |
2573 | spin_lock_bh(&state->im->mca_lock); | |
2574 | psf = state->im->mca_sources; | |
2575 | } | |
2576 | out: | |
2577 | return psf; | |
2578 | } | |
2579 | ||
2580 | static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos) | |
2581 | { | |
2582 | struct ip6_sf_list *psf = igmp6_mcf_get_first(seq); | |
2583 | if (psf) | |
2584 | while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL) | |
2585 | --pos; | |
2586 | return pos ? NULL : psf; | |
2587 | } | |
2588 | ||
2589 | static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2590 | __acquires(RCU) |
1da177e4 | 2591 | { |
ce81b76a | 2592 | rcu_read_lock(); |
1da177e4 LT |
2593 | return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
2594 | } | |
2595 | ||
2596 | static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2597 | { | |
2598 | struct ip6_sf_list *psf; | |
2599 | if (v == SEQ_START_TOKEN) | |
2600 | psf = igmp6_mcf_get_first(seq); | |
2601 | else | |
2602 | psf = igmp6_mcf_get_next(seq, v); | |
2603 | ++*pos; | |
2604 | return psf; | |
2605 | } | |
2606 | ||
2607 | static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2608 | __releases(RCU) |
1da177e4 LT |
2609 | { |
2610 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2611 | if (likely(state->im != NULL)) { | |
2612 | spin_unlock_bh(&state->im->mca_lock); | |
2613 | state->im = NULL; | |
2614 | } | |
2615 | if (likely(state->idev != NULL)) { | |
2616 | read_unlock_bh(&state->idev->lock); | |
1da177e4 LT |
2617 | state->idev = NULL; |
2618 | } | |
2619 | state->dev = NULL; | |
ce81b76a | 2620 | rcu_read_unlock(); |
1da177e4 LT |
2621 | } |
2622 | ||
2623 | static int igmp6_mcf_seq_show(struct seq_file *seq, void *v) | |
2624 | { | |
2625 | struct ip6_sf_list *psf = (struct ip6_sf_list *)v; | |
2626 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2627 | ||
2628 | if (v == SEQ_START_TOKEN) { | |
1ab1457c | 2629 | seq_printf(seq, |
1da177e4 | 2630 | "%3s %6s " |
9343e79a | 2631 | "%32s %32s %6s %6s\n", "Idx", |
1da177e4 LT |
2632 | "Device", "Multicast Address", |
2633 | "Source Address", "INC", "EXC"); | |
2634 | } else { | |
2635 | seq_printf(seq, | |
4b7a4274 | 2636 | "%3d %6.6s %pi6 %pi6 %6lu %6lu\n", |
1da177e4 | 2637 | state->dev->ifindex, state->dev->name, |
b071195d HH |
2638 | &state->im->mca_addr, |
2639 | &psf->sf_addr, | |
1da177e4 LT |
2640 | psf->sf_count[MCAST_INCLUDE], |
2641 | psf->sf_count[MCAST_EXCLUDE]); | |
2642 | } | |
2643 | return 0; | |
2644 | } | |
2645 | ||
56b3d975 | 2646 | static const struct seq_operations igmp6_mcf_seq_ops = { |
1da177e4 LT |
2647 | .start = igmp6_mcf_seq_start, |
2648 | .next = igmp6_mcf_seq_next, | |
2649 | .stop = igmp6_mcf_seq_stop, | |
2650 | .show = igmp6_mcf_seq_show, | |
2651 | }; | |
2652 | ||
2653 | static int igmp6_mcf_seq_open(struct inode *inode, struct file *file) | |
2654 | { | |
b8ad0cbc DL |
2655 | return seq_open_net(inode, file, &igmp6_mcf_seq_ops, |
2656 | sizeof(struct igmp6_mcf_iter_state)); | |
1da177e4 LT |
2657 | } |
2658 | ||
9a32144e | 2659 | static const struct file_operations igmp6_mcf_seq_fops = { |
1da177e4 LT |
2660 | .owner = THIS_MODULE, |
2661 | .open = igmp6_mcf_seq_open, | |
2662 | .read = seq_read, | |
2663 | .llseek = seq_lseek, | |
b8ad0cbc | 2664 | .release = seq_release_net, |
1da177e4 | 2665 | }; |
ea82edf7 | 2666 | |
2c8c1e72 | 2667 | static int __net_init igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2668 | { |
2669 | int err; | |
2670 | ||
2671 | err = -ENOMEM; | |
d4beaa66 | 2672 | if (!proc_create("igmp6", S_IRUGO, net->proc_net, &igmp6_mc_seq_fops)) |
ea82edf7 | 2673 | goto out; |
d4beaa66 G |
2674 | if (!proc_create("mcfilter6", S_IRUGO, net->proc_net, |
2675 | &igmp6_mcf_seq_fops)) | |
ea82edf7 DL |
2676 | goto out_proc_net_igmp6; |
2677 | ||
2678 | err = 0; | |
2679 | out: | |
2680 | return err; | |
2681 | ||
2682 | out_proc_net_igmp6: | |
ece31ffd | 2683 | remove_proc_entry("igmp6", net->proc_net); |
ea82edf7 DL |
2684 | goto out; |
2685 | } | |
2686 | ||
2c8c1e72 | 2687 | static void __net_exit igmp6_proc_exit(struct net *net) |
ea82edf7 | 2688 | { |
ece31ffd G |
2689 | remove_proc_entry("mcfilter6", net->proc_net); |
2690 | remove_proc_entry("igmp6", net->proc_net); | |
ea82edf7 DL |
2691 | } |
2692 | #else | |
2c8c1e72 | 2693 | static inline int igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2694 | { |
2695 | return 0; | |
2696 | } | |
2c8c1e72 | 2697 | static inline void igmp6_proc_exit(struct net *net) |
ea82edf7 | 2698 | { |
ea82edf7 | 2699 | } |
1da177e4 LT |
2700 | #endif |
2701 | ||
2c8c1e72 | 2702 | static int __net_init igmp6_net_init(struct net *net) |
1da177e4 | 2703 | { |
1da177e4 LT |
2704 | int err; |
2705 | ||
1ed8516f DL |
2706 | err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6, |
2707 | SOCK_RAW, IPPROTO_ICMPV6, net); | |
1da177e4 | 2708 | if (err < 0) { |
f3213831 | 2709 | pr_err("Failed to initialize the IGMP6 control socket (err %d)\n", |
1da177e4 | 2710 | err); |
b8ad0cbc | 2711 | goto out; |
1da177e4 LT |
2712 | } |
2713 | ||
1ed8516f | 2714 | inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1; |
1da177e4 | 2715 | |
ea82edf7 DL |
2716 | err = igmp6_proc_init(net); |
2717 | if (err) | |
b8ad0cbc | 2718 | goto out_sock_create; |
b8ad0cbc DL |
2719 | out: |
2720 | return err; | |
2721 | ||
2722 | out_sock_create: | |
1ed8516f | 2723 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
b8ad0cbc | 2724 | goto out; |
1da177e4 LT |
2725 | } |
2726 | ||
2c8c1e72 | 2727 | static void __net_exit igmp6_net_exit(struct net *net) |
1da177e4 | 2728 | { |
1ed8516f | 2729 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
ea82edf7 | 2730 | igmp6_proc_exit(net); |
1da177e4 | 2731 | } |
b8ad0cbc DL |
2732 | |
2733 | static struct pernet_operations igmp6_net_ops = { | |
2734 | .init = igmp6_net_init, | |
2735 | .exit = igmp6_net_exit, | |
2736 | }; | |
2737 | ||
2738 | int __init igmp6_init(void) | |
2739 | { | |
2740 | return register_pernet_subsys(&igmp6_net_ops); | |
2741 | } | |
2742 | ||
2743 | void igmp6_cleanup(void) | |
2744 | { | |
2745 | unregister_pernet_subsys(&igmp6_net_ops); | |
2746 | } |