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> |
6e7cb837 | 47 | #include <net/mld.h> |
1da177e4 LT |
48 | |
49 | #include <linux/netfilter.h> | |
50 | #include <linux/netfilter_ipv6.h> | |
51 | ||
457c4cbc | 52 | #include <net/net_namespace.h> |
1da177e4 LT |
53 | #include <net/sock.h> |
54 | #include <net/snmp.h> | |
55 | ||
56 | #include <net/ipv6.h> | |
57 | #include <net/protocol.h> | |
58 | #include <net/if_inet6.h> | |
59 | #include <net/ndisc.h> | |
60 | #include <net/addrconf.h> | |
61 | #include <net/ip6_route.h> | |
1ed8516f | 62 | #include <net/inet_common.h> |
1da177e4 LT |
63 | |
64 | #include <net/ip6_checksum.h> | |
65 | ||
66 | /* Set to 3 to get tracing... */ | |
67 | #define MCAST_DEBUG 2 | |
68 | ||
69 | #if MCAST_DEBUG >= 3 | |
70 | #define MDBG(x) printk x | |
71 | #else | |
72 | #define MDBG(x) | |
73 | #endif | |
74 | ||
6e7cb837 YH |
75 | /* Ensure that we have struct in6_addr aligned on 32bit word. */ |
76 | static void *__mld2_query_bugs[] __attribute__((__unused__)) = { | |
77 | BUILD_BUG_ON_NULL(offsetof(struct mld2_query, mld2q_srcs) % 4), | |
78 | BUILD_BUG_ON_NULL(offsetof(struct mld2_report, mld2r_grec) % 4), | |
79 | BUILD_BUG_ON_NULL(offsetof(struct mld2_grec, grec_mca) % 4) | |
1da177e4 LT |
80 | }; |
81 | ||
82 | static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT; | |
83 | ||
84 | /* Big mc list lock for all the sockets */ | |
85 | static DEFINE_RWLOCK(ipv6_sk_mc_lock); | |
86 | ||
1da177e4 LT |
87 | static void igmp6_join_group(struct ifmcaddr6 *ma); |
88 | static void igmp6_leave_group(struct ifmcaddr6 *ma); | |
89 | static void igmp6_timer_handler(unsigned long data); | |
90 | ||
91 | static void mld_gq_timer_expire(unsigned long data); | |
92 | static void mld_ifc_timer_expire(unsigned long data); | |
93 | static void mld_ifc_event(struct inet6_dev *idev); | |
94 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc); | |
95 | static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *addr); | |
96 | static void mld_clear_delrec(struct inet6_dev *idev); | |
97 | static int sf_setstate(struct ifmcaddr6 *pmc); | |
98 | static void sf_markstate(struct ifmcaddr6 *pmc); | |
99 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc); | |
100 | static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
101 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
102 | int delta); | |
103 | static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
104 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
105 | int delta); | |
106 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
107 | struct inet6_dev *idev); | |
108 | ||
109 | ||
110 | #define IGMP6_UNSOLICITED_IVAL (10*HZ) | |
111 | #define MLD_QRV_DEFAULT 2 | |
112 | ||
53b7997f | 113 | #define MLD_V1_SEEN(idev) (dev_net((idev)->dev)->ipv6.devconf_all->force_mld_version == 1 || \ |
1da177e4 LT |
114 | (idev)->cnf.force_mld_version == 1 || \ |
115 | ((idev)->mc_v1_seen && \ | |
116 | time_before(jiffies, (idev)->mc_v1_seen))) | |
117 | ||
6f4353d8 | 118 | #define IPV6_MLD_MAX_MSF 64 |
1da177e4 | 119 | |
ab32ea5d | 120 | int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF; |
1da177e4 LT |
121 | |
122 | /* | |
123 | * socket join on multicast group | |
124 | */ | |
125 | ||
9acd9f3a | 126 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) |
1da177e4 LT |
127 | { |
128 | struct net_device *dev = NULL; | |
129 | struct ipv6_mc_socklist *mc_lst; | |
130 | struct ipv6_pinfo *np = inet6_sk(sk); | |
3b1e0a65 | 131 | struct net *net = sock_net(sk); |
1da177e4 LT |
132 | int err; |
133 | ||
134 | if (!ipv6_addr_is_multicast(addr)) | |
135 | return -EINVAL; | |
136 | ||
c9e3e8b6 DS |
137 | read_lock_bh(&ipv6_sk_mc_lock); |
138 | for (mc_lst=np->ipv6_mc_list; mc_lst; mc_lst=mc_lst->next) { | |
139 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && | |
140 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
141 | read_unlock_bh(&ipv6_sk_mc_lock); | |
142 | return -EADDRINUSE; | |
143 | } | |
144 | } | |
145 | read_unlock_bh(&ipv6_sk_mc_lock); | |
146 | ||
1da177e4 LT |
147 | mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL); |
148 | ||
149 | if (mc_lst == NULL) | |
150 | return -ENOMEM; | |
151 | ||
152 | mc_lst->next = NULL; | |
153 | ipv6_addr_copy(&mc_lst->addr, addr); | |
154 | ||
155 | if (ifindex == 0) { | |
156 | struct rt6_info *rt; | |
b8ad0cbc | 157 | rt = rt6_lookup(net, addr, NULL, 0, 0); |
1da177e4 LT |
158 | if (rt) { |
159 | dev = rt->rt6i_dev; | |
160 | dev_hold(dev); | |
161 | dst_release(&rt->u.dst); | |
162 | } | |
163 | } else | |
b8ad0cbc | 164 | dev = dev_get_by_index(net, ifindex); |
1da177e4 LT |
165 | |
166 | if (dev == NULL) { | |
167 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); | |
168 | return -ENODEV; | |
169 | } | |
170 | ||
171 | mc_lst->ifindex = dev->ifindex; | |
172 | mc_lst->sfmode = MCAST_EXCLUDE; | |
196433c5 | 173 | rwlock_init(&mc_lst->sflock); |
1da177e4 LT |
174 | mc_lst->sflist = NULL; |
175 | ||
176 | /* | |
177 | * now add/increase the group membership on the device | |
178 | */ | |
179 | ||
180 | err = ipv6_dev_mc_inc(dev, addr); | |
181 | ||
182 | if (err) { | |
183 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); | |
184 | dev_put(dev); | |
185 | return err; | |
186 | } | |
187 | ||
188 | write_lock_bh(&ipv6_sk_mc_lock); | |
189 | mc_lst->next = np->ipv6_mc_list; | |
190 | np->ipv6_mc_list = mc_lst; | |
191 | write_unlock_bh(&ipv6_sk_mc_lock); | |
192 | ||
193 | dev_put(dev); | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | /* | |
199 | * socket leave on multicast group | |
200 | */ | |
9acd9f3a | 201 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) |
1da177e4 LT |
202 | { |
203 | struct ipv6_pinfo *np = inet6_sk(sk); | |
204 | struct ipv6_mc_socklist *mc_lst, **lnk; | |
3b1e0a65 | 205 | struct net *net = sock_net(sk); |
1da177e4 LT |
206 | |
207 | write_lock_bh(&ipv6_sk_mc_lock); | |
208 | for (lnk = &np->ipv6_mc_list; (mc_lst = *lnk) !=NULL ; lnk = &mc_lst->next) { | |
209 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && | |
210 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
211 | struct net_device *dev; | |
212 | ||
213 | *lnk = mc_lst->next; | |
214 | write_unlock_bh(&ipv6_sk_mc_lock); | |
215 | ||
b8ad0cbc DL |
216 | dev = dev_get_by_index(net, mc_lst->ifindex); |
217 | if (dev != NULL) { | |
1da177e4 LT |
218 | struct inet6_dev *idev = in6_dev_get(dev); |
219 | ||
acd6e00b | 220 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
1da177e4 | 221 | if (idev) { |
1da177e4 LT |
222 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
223 | in6_dev_put(idev); | |
224 | } | |
225 | dev_put(dev); | |
acd6e00b DS |
226 | } else |
227 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
1da177e4 LT |
228 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
229 | return 0; | |
230 | } | |
231 | } | |
232 | write_unlock_bh(&ipv6_sk_mc_lock); | |
233 | ||
9951f036 | 234 | return -EADDRNOTAVAIL; |
1da177e4 LT |
235 | } |
236 | ||
b8ad0cbc DL |
237 | static struct inet6_dev *ip6_mc_find_dev(struct net *net, |
238 | struct in6_addr *group, | |
239 | int ifindex) | |
1da177e4 LT |
240 | { |
241 | struct net_device *dev = NULL; | |
242 | struct inet6_dev *idev = NULL; | |
243 | ||
244 | if (ifindex == 0) { | |
245 | struct rt6_info *rt; | |
246 | ||
b8ad0cbc | 247 | rt = rt6_lookup(net, group, NULL, 0, 0); |
1da177e4 LT |
248 | if (rt) { |
249 | dev = rt->rt6i_dev; | |
250 | dev_hold(dev); | |
251 | dst_release(&rt->u.dst); | |
252 | } | |
253 | } else | |
b8ad0cbc | 254 | dev = dev_get_by_index(net, ifindex); |
1da177e4 LT |
255 | |
256 | if (!dev) | |
448eb71f | 257 | goto nodev; |
1da177e4 | 258 | idev = in6_dev_get(dev); |
448eb71f IJ |
259 | if (!idev) |
260 | goto release; | |
1da177e4 | 261 | read_lock_bh(&idev->lock); |
448eb71f IJ |
262 | if (idev->dead) |
263 | goto unlock_release; | |
264 | ||
1da177e4 | 265 | return idev; |
448eb71f IJ |
266 | |
267 | unlock_release: | |
268 | read_unlock_bh(&idev->lock); | |
269 | in6_dev_put(idev); | |
270 | release: | |
271 | dev_put(dev); | |
272 | nodev: | |
273 | return NULL; | |
1da177e4 LT |
274 | } |
275 | ||
276 | void ipv6_sock_mc_close(struct sock *sk) | |
277 | { | |
278 | struct ipv6_pinfo *np = inet6_sk(sk); | |
279 | struct ipv6_mc_socklist *mc_lst; | |
3b1e0a65 | 280 | struct net *net = sock_net(sk); |
1da177e4 LT |
281 | |
282 | write_lock_bh(&ipv6_sk_mc_lock); | |
283 | while ((mc_lst = np->ipv6_mc_list) != NULL) { | |
284 | struct net_device *dev; | |
285 | ||
286 | np->ipv6_mc_list = mc_lst->next; | |
287 | write_unlock_bh(&ipv6_sk_mc_lock); | |
288 | ||
b8ad0cbc | 289 | dev = dev_get_by_index(net, mc_lst->ifindex); |
1da177e4 LT |
290 | if (dev) { |
291 | struct inet6_dev *idev = in6_dev_get(dev); | |
292 | ||
acd6e00b | 293 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
1da177e4 | 294 | if (idev) { |
1da177e4 LT |
295 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
296 | in6_dev_put(idev); | |
297 | } | |
298 | dev_put(dev); | |
acd6e00b DS |
299 | } else |
300 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
1da177e4 LT |
301 | |
302 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); | |
303 | ||
304 | write_lock_bh(&ipv6_sk_mc_lock); | |
305 | } | |
306 | write_unlock_bh(&ipv6_sk_mc_lock); | |
307 | } | |
308 | ||
309 | int ip6_mc_source(int add, int omode, struct sock *sk, | |
310 | struct group_source_req *pgsr) | |
311 | { | |
312 | struct in6_addr *source, *group; | |
313 | struct ipv6_mc_socklist *pmc; | |
314 | struct net_device *dev; | |
315 | struct inet6_dev *idev; | |
316 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
317 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 318 | struct net *net = sock_net(sk); |
1da177e4 | 319 | int i, j, rv; |
c9e3e8b6 | 320 | int leavegroup = 0; |
5ab4a6c8 | 321 | int pmclocked = 0; |
1da177e4 LT |
322 | int err; |
323 | ||
1da177e4 LT |
324 | source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr; |
325 | group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr; | |
326 | ||
327 | if (!ipv6_addr_is_multicast(group)) | |
328 | return -EINVAL; | |
329 | ||
b8ad0cbc | 330 | idev = ip6_mc_find_dev(net, group, pgsr->gsr_interface); |
1da177e4 LT |
331 | if (!idev) |
332 | return -ENODEV; | |
333 | dev = idev->dev; | |
334 | ||
335 | err = -EADDRNOTAVAIL; | |
336 | ||
c9e3e8b6 | 337 | read_lock_bh(&ipv6_sk_mc_lock); |
1da177e4 LT |
338 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { |
339 | if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface) | |
340 | continue; | |
341 | if (ipv6_addr_equal(&pmc->addr, group)) | |
342 | break; | |
343 | } | |
917f2f10 DS |
344 | if (!pmc) { /* must have a prior join */ |
345 | err = -EINVAL; | |
1da177e4 | 346 | goto done; |
917f2f10 | 347 | } |
1da177e4 LT |
348 | /* if a source filter was set, must be the same mode as before */ |
349 | if (pmc->sflist) { | |
917f2f10 DS |
350 | if (pmc->sfmode != omode) { |
351 | err = -EINVAL; | |
1da177e4 | 352 | goto done; |
917f2f10 | 353 | } |
1da177e4 LT |
354 | } else if (pmc->sfmode != omode) { |
355 | /* allow mode switches for empty-set filters */ | |
356 | ip6_mc_add_src(idev, group, omode, 0, NULL, 0); | |
357 | ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
358 | pmc->sfmode = omode; | |
359 | } | |
360 | ||
5ab4a6c8 DS |
361 | write_lock_bh(&pmc->sflock); |
362 | pmclocked = 1; | |
363 | ||
1da177e4 LT |
364 | psl = pmc->sflist; |
365 | if (!add) { | |
366 | if (!psl) | |
917f2f10 | 367 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 LT |
368 | rv = !0; |
369 | for (i=0; i<psl->sl_count; i++) { | |
370 | rv = memcmp(&psl->sl_addr[i], source, | |
371 | sizeof(struct in6_addr)); | |
372 | if (rv == 0) | |
373 | break; | |
374 | } | |
375 | if (rv) /* source not found */ | |
917f2f10 | 376 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 377 | |
c9e3e8b6 DS |
378 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
379 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { | |
380 | leavegroup = 1; | |
381 | goto done; | |
382 | } | |
383 | ||
1da177e4 LT |
384 | /* update the interface filter */ |
385 | ip6_mc_del_src(idev, group, omode, 1, source, 1); | |
386 | ||
387 | for (j=i+1; j<psl->sl_count; j++) | |
388 | psl->sl_addr[j-1] = psl->sl_addr[j]; | |
389 | psl->sl_count--; | |
390 | err = 0; | |
391 | goto done; | |
392 | } | |
393 | /* else, add a new source to the filter */ | |
394 | ||
395 | if (psl && psl->sl_count >= sysctl_mld_max_msf) { | |
396 | err = -ENOBUFS; | |
397 | goto done; | |
398 | } | |
399 | if (!psl || psl->sl_count == psl->sl_max) { | |
400 | struct ip6_sf_socklist *newpsl; | |
401 | int count = IP6_SFBLOCK; | |
402 | ||
403 | if (psl) | |
404 | count += psl->sl_max; | |
8b3a7005 | 405 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC); |
1da177e4 LT |
406 | if (!newpsl) { |
407 | err = -ENOBUFS; | |
408 | goto done; | |
409 | } | |
410 | newpsl->sl_max = count; | |
411 | newpsl->sl_count = count - IP6_SFBLOCK; | |
412 | if (psl) { | |
413 | for (i=0; i<psl->sl_count; i++) | |
414 | newpsl->sl_addr[i] = psl->sl_addr[i]; | |
415 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
416 | } | |
417 | pmc->sflist = psl = newpsl; | |
418 | } | |
419 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ | |
420 | for (i=0; i<psl->sl_count; i++) { | |
421 | rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr)); | |
422 | if (rv == 0) | |
423 | break; | |
424 | } | |
425 | if (rv == 0) /* address already there is an error */ | |
426 | goto done; | |
427 | for (j=psl->sl_count-1; j>=i; j--) | |
428 | psl->sl_addr[j+1] = psl->sl_addr[j]; | |
429 | psl->sl_addr[i] = *source; | |
430 | psl->sl_count++; | |
431 | err = 0; | |
432 | /* update the interface list */ | |
433 | ip6_mc_add_src(idev, group, omode, 1, source, 1); | |
434 | done: | |
5ab4a6c8 DS |
435 | if (pmclocked) |
436 | write_unlock_bh(&pmc->sflock); | |
c9e3e8b6 | 437 | read_unlock_bh(&ipv6_sk_mc_lock); |
1da177e4 LT |
438 | read_unlock_bh(&idev->lock); |
439 | in6_dev_put(idev); | |
440 | dev_put(dev); | |
c9e3e8b6 DS |
441 | if (leavegroup) |
442 | return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group); | |
1da177e4 LT |
443 | return err; |
444 | } | |
445 | ||
446 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) | |
447 | { | |
448 | struct in6_addr *group; | |
449 | struct ipv6_mc_socklist *pmc; | |
450 | struct net_device *dev; | |
451 | struct inet6_dev *idev; | |
452 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
453 | struct ip6_sf_socklist *newpsl, *psl; | |
3b1e0a65 | 454 | struct net *net = sock_net(sk); |
9951f036 | 455 | int leavegroup = 0; |
1da177e4 LT |
456 | int i, err; |
457 | ||
458 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
459 | ||
460 | if (!ipv6_addr_is_multicast(group)) | |
461 | return -EINVAL; | |
462 | if (gsf->gf_fmode != MCAST_INCLUDE && | |
463 | gsf->gf_fmode != MCAST_EXCLUDE) | |
464 | return -EINVAL; | |
465 | ||
b8ad0cbc | 466 | idev = ip6_mc_find_dev(net, group, gsf->gf_interface); |
1da177e4 LT |
467 | |
468 | if (!idev) | |
469 | return -ENODEV; | |
470 | dev = idev->dev; | |
1da177e4 | 471 | |
9c05989b | 472 | err = 0; |
5ab4a6c8 DS |
473 | read_lock_bh(&ipv6_sk_mc_lock); |
474 | ||
9951f036 DS |
475 | if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) { |
476 | leavegroup = 1; | |
477 | goto done; | |
478 | } | |
479 | ||
1da177e4 LT |
480 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { |
481 | if (pmc->ifindex != gsf->gf_interface) | |
482 | continue; | |
483 | if (ipv6_addr_equal(&pmc->addr, group)) | |
484 | break; | |
485 | } | |
917f2f10 DS |
486 | if (!pmc) { /* must have a prior join */ |
487 | err = -EINVAL; | |
1da177e4 | 488 | goto done; |
917f2f10 | 489 | } |
1da177e4 | 490 | if (gsf->gf_numsrc) { |
8b3a7005 KK |
491 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc), |
492 | GFP_ATOMIC); | |
1da177e4 LT |
493 | if (!newpsl) { |
494 | err = -ENOBUFS; | |
495 | goto done; | |
496 | } | |
497 | newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc; | |
498 | for (i=0; i<newpsl->sl_count; ++i) { | |
499 | struct sockaddr_in6 *psin6; | |
500 | ||
501 | psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i]; | |
502 | newpsl->sl_addr[i] = psin6->sin6_addr; | |
503 | } | |
504 | err = ip6_mc_add_src(idev, group, gsf->gf_fmode, | |
505 | newpsl->sl_count, newpsl->sl_addr, 0); | |
506 | if (err) { | |
507 | sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); | |
508 | goto done; | |
509 | } | |
8713dbf0 | 510 | } else { |
1da177e4 | 511 | newpsl = NULL; |
8713dbf0 YZ |
512 | (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); |
513 | } | |
5ab4a6c8 DS |
514 | |
515 | write_lock_bh(&pmc->sflock); | |
1da177e4 LT |
516 | psl = pmc->sflist; |
517 | if (psl) { | |
518 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, | |
519 | psl->sl_count, psl->sl_addr, 0); | |
520 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
521 | } else | |
522 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
523 | pmc->sflist = newpsl; | |
524 | pmc->sfmode = gsf->gf_fmode; | |
5ab4a6c8 | 525 | write_unlock_bh(&pmc->sflock); |
917f2f10 | 526 | err = 0; |
1da177e4 | 527 | done: |
5ab4a6c8 | 528 | read_unlock_bh(&ipv6_sk_mc_lock); |
1da177e4 LT |
529 | read_unlock_bh(&idev->lock); |
530 | in6_dev_put(idev); | |
531 | dev_put(dev); | |
9951f036 DS |
532 | if (leavegroup) |
533 | err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group); | |
1da177e4 LT |
534 | return err; |
535 | } | |
536 | ||
537 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
538 | struct group_filter __user *optval, int __user *optlen) | |
539 | { | |
540 | int err, i, count, copycount; | |
541 | struct in6_addr *group; | |
542 | struct ipv6_mc_socklist *pmc; | |
543 | struct inet6_dev *idev; | |
544 | struct net_device *dev; | |
545 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
546 | struct ip6_sf_socklist *psl; | |
3b1e0a65 | 547 | struct net *net = sock_net(sk); |
1da177e4 LT |
548 | |
549 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
550 | ||
551 | if (!ipv6_addr_is_multicast(group)) | |
552 | return -EINVAL; | |
553 | ||
b8ad0cbc | 554 | idev = ip6_mc_find_dev(net, group, gsf->gf_interface); |
1da177e4 LT |
555 | |
556 | if (!idev) | |
557 | return -ENODEV; | |
558 | ||
559 | dev = idev->dev; | |
560 | ||
561 | err = -EADDRNOTAVAIL; | |
5ab4a6c8 DS |
562 | /* |
563 | * changes to the ipv6_mc_list require the socket lock and | |
564 | * a read lock on ip6_sk_mc_lock. We have the socket lock, | |
565 | * so reading the list is safe. | |
566 | */ | |
1da177e4 LT |
567 | |
568 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { | |
569 | if (pmc->ifindex != gsf->gf_interface) | |
570 | continue; | |
571 | if (ipv6_addr_equal(group, &pmc->addr)) | |
572 | break; | |
573 | } | |
574 | if (!pmc) /* must have a prior join */ | |
575 | goto done; | |
576 | gsf->gf_fmode = pmc->sfmode; | |
577 | psl = pmc->sflist; | |
578 | count = psl ? psl->sl_count : 0; | |
579 | read_unlock_bh(&idev->lock); | |
580 | in6_dev_put(idev); | |
581 | dev_put(dev); | |
582 | ||
583 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; | |
584 | gsf->gf_numsrc = count; | |
585 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || | |
586 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { | |
587 | return -EFAULT; | |
588 | } | |
5ab4a6c8 DS |
589 | /* changes to psl require the socket lock, a read lock on |
590 | * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We | |
591 | * have the socket lock, so reading here is safe. | |
592 | */ | |
1da177e4 LT |
593 | for (i=0; i<copycount; i++) { |
594 | struct sockaddr_in6 *psin6; | |
595 | struct sockaddr_storage ss; | |
596 | ||
597 | psin6 = (struct sockaddr_in6 *)&ss; | |
598 | memset(&ss, 0, sizeof(ss)); | |
599 | psin6->sin6_family = AF_INET6; | |
600 | psin6->sin6_addr = psl->sl_addr[i]; | |
1ab1457c | 601 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) |
1da177e4 LT |
602 | return -EFAULT; |
603 | } | |
604 | return 0; | |
605 | done: | |
606 | read_unlock_bh(&idev->lock); | |
607 | in6_dev_put(idev); | |
608 | dev_put(dev); | |
609 | return err; | |
610 | } | |
611 | ||
9acd9f3a YH |
612 | int inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, |
613 | const struct in6_addr *src_addr) | |
1da177e4 LT |
614 | { |
615 | struct ipv6_pinfo *np = inet6_sk(sk); | |
616 | struct ipv6_mc_socklist *mc; | |
617 | struct ip6_sf_socklist *psl; | |
618 | int rv = 1; | |
619 | ||
620 | read_lock(&ipv6_sk_mc_lock); | |
621 | for (mc = np->ipv6_mc_list; mc; mc = mc->next) { | |
622 | if (ipv6_addr_equal(&mc->addr, mc_addr)) | |
623 | break; | |
624 | } | |
625 | if (!mc) { | |
626 | read_unlock(&ipv6_sk_mc_lock); | |
627 | return 1; | |
628 | } | |
5ab4a6c8 | 629 | read_lock(&mc->sflock); |
1da177e4 LT |
630 | psl = mc->sflist; |
631 | if (!psl) { | |
632 | rv = mc->sfmode == MCAST_EXCLUDE; | |
633 | } else { | |
634 | int i; | |
635 | ||
636 | for (i=0; i<psl->sl_count; i++) { | |
637 | if (ipv6_addr_equal(&psl->sl_addr[i], src_addr)) | |
638 | break; | |
639 | } | |
640 | if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) | |
641 | rv = 0; | |
642 | if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) | |
643 | rv = 0; | |
644 | } | |
5ab4a6c8 | 645 | read_unlock(&mc->sflock); |
1da177e4 LT |
646 | read_unlock(&ipv6_sk_mc_lock); |
647 | ||
648 | return rv; | |
649 | } | |
650 | ||
651 | static void ma_put(struct ifmcaddr6 *mc) | |
652 | { | |
653 | if (atomic_dec_and_test(&mc->mca_refcnt)) { | |
654 | in6_dev_put(mc->idev); | |
655 | kfree(mc); | |
656 | } | |
657 | } | |
658 | ||
659 | static void igmp6_group_added(struct ifmcaddr6 *mc) | |
660 | { | |
661 | struct net_device *dev = mc->idev->dev; | |
662 | char buf[MAX_ADDR_LEN]; | |
663 | ||
664 | spin_lock_bh(&mc->mca_lock); | |
665 | if (!(mc->mca_flags&MAF_LOADED)) { | |
666 | mc->mca_flags |= MAF_LOADED; | |
667 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 668 | dev_mc_add(dev, buf); |
1da177e4 LT |
669 | } |
670 | spin_unlock_bh(&mc->mca_lock); | |
671 | ||
672 | if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT)) | |
673 | return; | |
674 | ||
675 | if (MLD_V1_SEEN(mc->idev)) { | |
676 | igmp6_join_group(mc); | |
677 | return; | |
678 | } | |
679 | /* else v2 */ | |
680 | ||
681 | mc->mca_crcount = mc->idev->mc_qrv; | |
682 | mld_ifc_event(mc->idev); | |
683 | } | |
684 | ||
685 | static void igmp6_group_dropped(struct ifmcaddr6 *mc) | |
686 | { | |
687 | struct net_device *dev = mc->idev->dev; | |
688 | char buf[MAX_ADDR_LEN]; | |
689 | ||
690 | spin_lock_bh(&mc->mca_lock); | |
691 | if (mc->mca_flags&MAF_LOADED) { | |
692 | mc->mca_flags &= ~MAF_LOADED; | |
693 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
22bedad3 | 694 | dev_mc_del(dev, buf); |
1da177e4 LT |
695 | } |
696 | ||
697 | if (mc->mca_flags & MAF_NOREPORT) | |
698 | goto done; | |
699 | spin_unlock_bh(&mc->mca_lock); | |
700 | ||
701 | if (!mc->idev->dead) | |
702 | igmp6_leave_group(mc); | |
703 | ||
704 | spin_lock_bh(&mc->mca_lock); | |
705 | if (del_timer(&mc->mca_timer)) | |
706 | atomic_dec(&mc->mca_refcnt); | |
707 | done: | |
708 | ip6_mc_clear_src(mc); | |
709 | spin_unlock_bh(&mc->mca_lock); | |
710 | } | |
711 | ||
712 | /* | |
713 | * deleted ifmcaddr6 manipulation | |
714 | */ | |
715 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) | |
716 | { | |
717 | struct ifmcaddr6 *pmc; | |
718 | ||
719 | /* this is an "ifmcaddr6" for convenience; only the fields below | |
720 | * are actually used. In particular, the refcnt and users are not | |
721 | * used for management of the delete list. Using the same structure | |
722 | * for deleted items allows change reports to use common code with | |
723 | * non-deleted or query-response MCA's. | |
724 | */ | |
0c600eda | 725 | pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC); |
1da177e4 LT |
726 | if (!pmc) |
727 | return; | |
0c600eda | 728 | |
1da177e4 LT |
729 | spin_lock_bh(&im->mca_lock); |
730 | spin_lock_init(&pmc->mca_lock); | |
731 | pmc->idev = im->idev; | |
732 | in6_dev_hold(idev); | |
733 | pmc->mca_addr = im->mca_addr; | |
734 | pmc->mca_crcount = idev->mc_qrv; | |
735 | pmc->mca_sfmode = im->mca_sfmode; | |
736 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
737 | struct ip6_sf_list *psf; | |
738 | ||
739 | pmc->mca_tomb = im->mca_tomb; | |
740 | pmc->mca_sources = im->mca_sources; | |
741 | im->mca_tomb = im->mca_sources = NULL; | |
742 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) | |
743 | psf->sf_crcount = pmc->mca_crcount; | |
744 | } | |
745 | spin_unlock_bh(&im->mca_lock); | |
746 | ||
6457d26b | 747 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
748 | pmc->next = idev->mc_tomb; |
749 | idev->mc_tomb = pmc; | |
6457d26b | 750 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
751 | } |
752 | ||
753 | static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca) | |
754 | { | |
755 | struct ifmcaddr6 *pmc, *pmc_prev; | |
756 | struct ip6_sf_list *psf, *psf_next; | |
757 | ||
6457d26b | 758 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
759 | pmc_prev = NULL; |
760 | for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) { | |
761 | if (ipv6_addr_equal(&pmc->mca_addr, pmca)) | |
762 | break; | |
763 | pmc_prev = pmc; | |
764 | } | |
765 | if (pmc) { | |
766 | if (pmc_prev) | |
767 | pmc_prev->next = pmc->next; | |
768 | else | |
769 | idev->mc_tomb = pmc->next; | |
770 | } | |
6457d26b SH |
771 | spin_unlock_bh(&idev->mc_lock); |
772 | ||
1da177e4 LT |
773 | if (pmc) { |
774 | for (psf=pmc->mca_tomb; psf; psf=psf_next) { | |
775 | psf_next = psf->sf_next; | |
776 | kfree(psf); | |
777 | } | |
778 | in6_dev_put(pmc->idev); | |
779 | kfree(pmc); | |
780 | } | |
781 | } | |
782 | ||
783 | static void mld_clear_delrec(struct inet6_dev *idev) | |
784 | { | |
785 | struct ifmcaddr6 *pmc, *nextpmc; | |
786 | ||
6457d26b | 787 | spin_lock_bh(&idev->mc_lock); |
1da177e4 LT |
788 | pmc = idev->mc_tomb; |
789 | idev->mc_tomb = NULL; | |
6457d26b | 790 | spin_unlock_bh(&idev->mc_lock); |
1da177e4 LT |
791 | |
792 | for (; pmc; pmc = nextpmc) { | |
793 | nextpmc = pmc->next; | |
794 | ip6_mc_clear_src(pmc); | |
795 | in6_dev_put(pmc->idev); | |
796 | kfree(pmc); | |
797 | } | |
798 | ||
799 | /* clear dead sources, too */ | |
800 | read_lock_bh(&idev->lock); | |
801 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
802 | struct ip6_sf_list *psf, *psf_next; | |
803 | ||
804 | spin_lock_bh(&pmc->mca_lock); | |
805 | psf = pmc->mca_tomb; | |
806 | pmc->mca_tomb = NULL; | |
807 | spin_unlock_bh(&pmc->mca_lock); | |
808 | for (; psf; psf=psf_next) { | |
809 | psf_next = psf->sf_next; | |
810 | kfree(psf); | |
811 | } | |
812 | } | |
813 | read_unlock_bh(&idev->lock); | |
814 | } | |
815 | ||
816 | ||
817 | /* | |
818 | * device multicast group inc (add if not found) | |
819 | */ | |
9acd9f3a | 820 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
821 | { |
822 | struct ifmcaddr6 *mc; | |
823 | struct inet6_dev *idev; | |
824 | ||
825 | idev = in6_dev_get(dev); | |
826 | ||
827 | if (idev == NULL) | |
828 | return -EINVAL; | |
829 | ||
830 | write_lock_bh(&idev->lock); | |
831 | if (idev->dead) { | |
832 | write_unlock_bh(&idev->lock); | |
833 | in6_dev_put(idev); | |
834 | return -ENODEV; | |
835 | } | |
836 | ||
837 | for (mc = idev->mc_list; mc; mc = mc->next) { | |
838 | if (ipv6_addr_equal(&mc->mca_addr, addr)) { | |
839 | mc->mca_users++; | |
840 | write_unlock_bh(&idev->lock); | |
841 | ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0, | |
842 | NULL, 0); | |
843 | in6_dev_put(idev); | |
844 | return 0; | |
845 | } | |
846 | } | |
847 | ||
848 | /* | |
849 | * not found: create a new one. | |
850 | */ | |
851 | ||
0c600eda | 852 | mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC); |
1da177e4 LT |
853 | |
854 | if (mc == NULL) { | |
855 | write_unlock_bh(&idev->lock); | |
856 | in6_dev_put(idev); | |
857 | return -ENOMEM; | |
858 | } | |
859 | ||
b24b8a24 | 860 | setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc); |
1da177e4 LT |
861 | |
862 | ipv6_addr_copy(&mc->mca_addr, addr); | |
863 | mc->idev = idev; | |
864 | mc->mca_users = 1; | |
865 | /* mca_stamp should be updated upon changes */ | |
866 | mc->mca_cstamp = mc->mca_tstamp = jiffies; | |
867 | atomic_set(&mc->mca_refcnt, 2); | |
868 | spin_lock_init(&mc->mca_lock); | |
869 | ||
870 | /* initial mode is (EX, empty) */ | |
871 | mc->mca_sfmode = MCAST_EXCLUDE; | |
872 | mc->mca_sfcount[MCAST_EXCLUDE] = 1; | |
873 | ||
874 | if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) || | |
875 | IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
876 | mc->mca_flags |= MAF_NOREPORT; | |
877 | ||
878 | mc->next = idev->mc_list; | |
879 | idev->mc_list = mc; | |
880 | write_unlock_bh(&idev->lock); | |
881 | ||
882 | mld_del_delrec(idev, &mc->mca_addr); | |
883 | igmp6_group_added(mc); | |
884 | ma_put(mc); | |
885 | return 0; | |
886 | } | |
887 | ||
888 | /* | |
889 | * device multicast group del | |
890 | */ | |
9acd9f3a | 891 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr) |
1da177e4 LT |
892 | { |
893 | struct ifmcaddr6 *ma, **map; | |
894 | ||
895 | write_lock_bh(&idev->lock); | |
896 | for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) { | |
897 | if (ipv6_addr_equal(&ma->mca_addr, addr)) { | |
898 | if (--ma->mca_users == 0) { | |
899 | *map = ma->next; | |
900 | write_unlock_bh(&idev->lock); | |
901 | ||
902 | igmp6_group_dropped(ma); | |
903 | ||
904 | ma_put(ma); | |
905 | return 0; | |
906 | } | |
907 | write_unlock_bh(&idev->lock); | |
908 | return 0; | |
909 | } | |
910 | } | |
911 | write_unlock_bh(&idev->lock); | |
912 | ||
913 | return -ENOENT; | |
914 | } | |
915 | ||
9acd9f3a | 916 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr) |
1da177e4 LT |
917 | { |
918 | struct inet6_dev *idev = in6_dev_get(dev); | |
919 | int err; | |
920 | ||
921 | if (!idev) | |
922 | return -ENODEV; | |
923 | ||
924 | err = __ipv6_dev_mc_dec(idev, addr); | |
925 | ||
926 | in6_dev_put(idev); | |
927 | ||
928 | return err; | |
929 | } | |
930 | ||
931 | /* | |
932 | * identify MLD packets for MLD filter exceptions | |
933 | */ | |
934 | int ipv6_is_mld(struct sk_buff *skb, int nexthdr) | |
935 | { | |
936 | struct icmp6hdr *pic; | |
937 | ||
938 | if (nexthdr != IPPROTO_ICMPV6) | |
939 | return 0; | |
940 | ||
941 | if (!pskb_may_pull(skb, sizeof(struct icmp6hdr))) | |
942 | return 0; | |
943 | ||
cc70ab26 | 944 | pic = icmp6_hdr(skb); |
1da177e4 LT |
945 | |
946 | switch (pic->icmp6_type) { | |
947 | case ICMPV6_MGM_QUERY: | |
948 | case ICMPV6_MGM_REPORT: | |
949 | case ICMPV6_MGM_REDUCTION: | |
950 | case ICMPV6_MLD2_REPORT: | |
951 | return 1; | |
952 | default: | |
953 | break; | |
954 | } | |
955 | return 0; | |
956 | } | |
957 | ||
958 | /* | |
959 | * check if the interface/address pair is valid | |
960 | */ | |
9acd9f3a YH |
961 | int ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, |
962 | const struct in6_addr *src_addr) | |
1da177e4 LT |
963 | { |
964 | struct inet6_dev *idev; | |
965 | struct ifmcaddr6 *mc; | |
966 | int rv = 0; | |
967 | ||
968 | idev = in6_dev_get(dev); | |
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 | |
992 | rv = 1; /* don't filter unspecified source */ | |
993 | } | |
994 | read_unlock_bh(&idev->lock); | |
995 | in6_dev_put(idev); | |
996 | } | |
997 | return rv; | |
998 | } | |
999 | ||
1000 | static void mld_gq_start_timer(struct inet6_dev *idev) | |
1001 | { | |
1002 | int tv = net_random() % idev->mc_maxdelay; | |
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 | ||
1009 | static void mld_ifc_start_timer(struct inet6_dev *idev, int delay) | |
1010 | { | |
1011 | int tv = net_random() % delay; | |
1012 | ||
1013 | if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2)) | |
1014 | in6_dev_hold(idev); | |
1015 | } | |
1016 | ||
1017 | /* | |
1018 | * IGMP handling (alias multicast ICMPv6 messages) | |
1019 | */ | |
1020 | ||
1021 | static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) | |
1022 | { | |
1023 | unsigned long delay = resptime; | |
1024 | ||
1025 | /* Do not start timer for these addresses */ | |
1026 | if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) || | |
1027 | IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
1028 | return; | |
1029 | ||
1030 | if (del_timer(&ma->mca_timer)) { | |
1031 | atomic_dec(&ma->mca_refcnt); | |
1032 | delay = ma->mca_timer.expires - jiffies; | |
1033 | } | |
1034 | ||
1035 | if (delay >= resptime) { | |
1036 | if (resptime) | |
1037 | delay = net_random() % resptime; | |
1038 | else | |
1039 | delay = 1; | |
1040 | } | |
1041 | ma->mca_timer.expires = jiffies + delay; | |
1042 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
1043 | atomic_inc(&ma->mca_refcnt); | |
1044 | ma->mca_flags |= MAF_TIMER_RUNNING; | |
1045 | } | |
1046 | ||
5ab4a6c8 DS |
1047 | /* mark EXCLUDE-mode sources */ |
1048 | static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs, | |
1da177e4 LT |
1049 | struct in6_addr *srcs) |
1050 | { | |
1051 | struct ip6_sf_list *psf; | |
1052 | int i, scount; | |
1053 | ||
1054 | scount = 0; | |
1055 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1056 | if (scount == nsrcs) | |
1057 | break; | |
5ab4a6c8 DS |
1058 | for (i=0; i<nsrcs; i++) { |
1059 | /* skip inactive filters */ | |
1060 | if (pmc->mca_sfcount[MCAST_INCLUDE] || | |
1061 | pmc->mca_sfcount[MCAST_EXCLUDE] != | |
1062 | psf->sf_count[MCAST_EXCLUDE]) | |
1063 | continue; | |
1064 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { | |
1065 | scount++; | |
1066 | break; | |
1067 | } | |
1068 | } | |
1069 | } | |
1070 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1071 | if (scount == nsrcs) /* all sources excluded */ | |
1072 | return 0; | |
1073 | return 1; | |
1074 | } | |
1075 | ||
1076 | static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs, | |
1077 | struct in6_addr *srcs) | |
1078 | { | |
1079 | struct ip6_sf_list *psf; | |
1080 | int i, scount; | |
1081 | ||
1082 | if (pmc->mca_sfmode == MCAST_EXCLUDE) | |
1083 | return mld_xmarksources(pmc, nsrcs, srcs); | |
1084 | ||
1085 | /* mark INCLUDE-mode sources */ | |
1086 | ||
1087 | scount = 0; | |
1088 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1089 | if (scount == nsrcs) | |
1090 | break; | |
1091 | for (i=0; i<nsrcs; i++) { | |
1da177e4 LT |
1092 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1093 | psf->sf_gsresp = 1; | |
1094 | scount++; | |
1095 | break; | |
1096 | } | |
5ab4a6c8 DS |
1097 | } |
1098 | } | |
1099 | if (!scount) { | |
1100 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1101 | return 0; | |
1da177e4 | 1102 | } |
5ab4a6c8 DS |
1103 | pmc->mca_flags |= MAF_GSQUERY; |
1104 | return 1; | |
1da177e4 LT |
1105 | } |
1106 | ||
1107 | int igmp6_event_query(struct sk_buff *skb) | |
1108 | { | |
97300b5f | 1109 | struct mld2_query *mlh2 = NULL; |
1da177e4 LT |
1110 | struct ifmcaddr6 *ma; |
1111 | struct in6_addr *group; | |
1112 | unsigned long max_delay; | |
1113 | struct inet6_dev *idev; | |
6e7cb837 | 1114 | struct mld_msg *mld; |
1da177e4 LT |
1115 | int group_type; |
1116 | int mark = 0; | |
1117 | int len; | |
1118 | ||
1119 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) | |
1120 | return -EINVAL; | |
1121 | ||
1122 | /* compute payload length excluding extension headers */ | |
0660e03f | 1123 | len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); |
cfe1fc77 | 1124 | len -= skb_network_header_len(skb); |
1da177e4 LT |
1125 | |
1126 | /* Drop queries with not link local source */ | |
0660e03f | 1127 | if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) |
1da177e4 LT |
1128 | return -EINVAL; |
1129 | ||
1130 | idev = in6_dev_get(skb->dev); | |
1131 | ||
1132 | if (idev == NULL) | |
1133 | return 0; | |
1134 | ||
6e7cb837 YH |
1135 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1136 | group = &mld->mld_mca; | |
1da177e4 LT |
1137 | group_type = ipv6_addr_type(group); |
1138 | ||
1139 | if (group_type != IPV6_ADDR_ANY && | |
1140 | !(group_type&IPV6_ADDR_MULTICAST)) { | |
1141 | in6_dev_put(idev); | |
1142 | return -EINVAL; | |
1143 | } | |
1144 | ||
1145 | if (len == 24) { | |
1146 | int switchback; | |
1147 | /* MLDv1 router present */ | |
1148 | ||
1149 | /* Translate milliseconds to jiffies */ | |
6e7cb837 | 1150 | max_delay = (ntohs(mld->mld_maxdelay)*HZ)/1000; |
1da177e4 LT |
1151 | |
1152 | switchback = (idev->mc_qrv + 1) * max_delay; | |
1153 | idev->mc_v1_seen = jiffies + switchback; | |
1154 | ||
1155 | /* cancel the interface change timer */ | |
1156 | idev->mc_ifc_count = 0; | |
1157 | if (del_timer(&idev->mc_ifc_timer)) | |
1158 | __in6_dev_put(idev); | |
1159 | /* clear deleted report items */ | |
1160 | mld_clear_delrec(idev); | |
1161 | } else if (len >= 28) { | |
1ab1457c | 1162 | int srcs_offset = sizeof(struct mld2_query) - |
97300b5f YZ |
1163 | sizeof(struct icmp6hdr); |
1164 | if (!pskb_may_pull(skb, srcs_offset)) { | |
1165 | in6_dev_put(idev); | |
1166 | return -EINVAL; | |
1167 | } | |
9c70220b | 1168 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
6e7cb837 | 1169 | max_delay = (MLDV2_MRC(ntohs(mlh2->mld2q_mrc))*HZ)/1000; |
1da177e4 LT |
1170 | if (!max_delay) |
1171 | max_delay = 1; | |
1172 | idev->mc_maxdelay = max_delay; | |
6e7cb837 YH |
1173 | if (mlh2->mld2q_qrv) |
1174 | idev->mc_qrv = mlh2->mld2q_qrv; | |
1da177e4 | 1175 | if (group_type == IPV6_ADDR_ANY) { /* general query */ |
6e7cb837 | 1176 | if (mlh2->mld2q_nsrcs) { |
1da177e4 LT |
1177 | in6_dev_put(idev); |
1178 | return -EINVAL; /* no sources allowed */ | |
1179 | } | |
1180 | mld_gq_start_timer(idev); | |
1181 | in6_dev_put(idev); | |
1182 | return 0; | |
1183 | } | |
1184 | /* mark sources to include, if group & source-specific */ | |
6e7cb837 | 1185 | if (mlh2->mld2q_nsrcs != 0) { |
1ab1457c | 1186 | if (!pskb_may_pull(skb, srcs_offset + |
6e7cb837 | 1187 | ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr))) { |
97300b5f YZ |
1188 | in6_dev_put(idev); |
1189 | return -EINVAL; | |
1190 | } | |
9c70220b | 1191 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
97300b5f YZ |
1192 | mark = 1; |
1193 | } | |
1da177e4 LT |
1194 | } else { |
1195 | in6_dev_put(idev); | |
1196 | return -EINVAL; | |
1197 | } | |
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); | |
1230 | in6_dev_put(idev); | |
1231 | ||
1232 | return 0; | |
1233 | } | |
1234 | ||
1235 | ||
1236 | int igmp6_event_report(struct sk_buff *skb) | |
1237 | { | |
1238 | struct ifmcaddr6 *ma; | |
1da177e4 | 1239 | struct inet6_dev *idev; |
6e7cb837 | 1240 | struct mld_msg *mld; |
1da177e4 LT |
1241 | int addr_type; |
1242 | ||
1243 | /* Our own report looped back. Ignore it. */ | |
1244 | if (skb->pkt_type == PACKET_LOOPBACK) | |
1245 | return 0; | |
1246 | ||
24c69275 DS |
1247 | /* send our report if the MC router may not have heard this report */ |
1248 | if (skb->pkt_type != PACKET_MULTICAST && | |
1249 | skb->pkt_type != PACKET_BROADCAST) | |
1250 | return 0; | |
1251 | ||
6e7cb837 | 1252 | if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr))) |
1da177e4 LT |
1253 | return -EINVAL; |
1254 | ||
6e7cb837 | 1255 | mld = (struct mld_msg *)icmp6_hdr(skb); |
1da177e4 LT |
1256 | |
1257 | /* Drop reports with not link local source */ | |
0660e03f | 1258 | addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr); |
1ab1457c | 1259 | if (addr_type != IPV6_ADDR_ANY && |
1da177e4 LT |
1260 | !(addr_type&IPV6_ADDR_LINKLOCAL)) |
1261 | return -EINVAL; | |
1262 | ||
1da177e4 LT |
1263 | idev = in6_dev_get(skb->dev); |
1264 | if (idev == NULL) | |
1265 | return -ENODEV; | |
1266 | ||
1267 | /* | |
1268 | * Cancel the timer for this group | |
1269 | */ | |
1270 | ||
1271 | read_lock_bh(&idev->lock); | |
1272 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
6e7cb837 | 1273 | if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) { |
1da177e4 LT |
1274 | spin_lock(&ma->mca_lock); |
1275 | if (del_timer(&ma->mca_timer)) | |
1276 | atomic_dec(&ma->mca_refcnt); | |
1277 | ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING); | |
1278 | spin_unlock(&ma->mca_lock); | |
1279 | break; | |
1280 | } | |
1281 | } | |
1282 | read_unlock_bh(&idev->lock); | |
1283 | in6_dev_put(idev); | |
1284 | return 0; | |
1285 | } | |
1286 | ||
1287 | static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type, | |
1288 | int gdeleted, int sdeleted) | |
1289 | { | |
1290 | switch (type) { | |
1291 | case MLD2_MODE_IS_INCLUDE: | |
1292 | case MLD2_MODE_IS_EXCLUDE: | |
1293 | if (gdeleted || sdeleted) | |
1294 | return 0; | |
5ab4a6c8 DS |
1295 | if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) { |
1296 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1297 | return 1; | |
1298 | /* don't include if this source is excluded | |
1299 | * in all filters | |
1300 | */ | |
1301 | if (psf->sf_count[MCAST_INCLUDE]) | |
7add2a43 | 1302 | return type == MLD2_MODE_IS_INCLUDE; |
5ab4a6c8 DS |
1303 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1304 | psf->sf_count[MCAST_EXCLUDE]; | |
1305 | } | |
1306 | return 0; | |
1da177e4 LT |
1307 | case MLD2_CHANGE_TO_INCLUDE: |
1308 | if (gdeleted || sdeleted) | |
1309 | return 0; | |
1310 | return psf->sf_count[MCAST_INCLUDE] != 0; | |
1311 | case MLD2_CHANGE_TO_EXCLUDE: | |
1312 | if (gdeleted || sdeleted) | |
1313 | return 0; | |
1314 | if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 || | |
1315 | psf->sf_count[MCAST_INCLUDE]) | |
1316 | return 0; | |
1317 | return pmc->mca_sfcount[MCAST_EXCLUDE] == | |
1318 | psf->sf_count[MCAST_EXCLUDE]; | |
1319 | case MLD2_ALLOW_NEW_SOURCES: | |
1320 | if (gdeleted || !psf->sf_crcount) | |
1321 | return 0; | |
1322 | return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted; | |
1323 | case MLD2_BLOCK_OLD_SOURCES: | |
1324 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1325 | return gdeleted || (psf->sf_crcount && sdeleted); | |
1326 | return psf->sf_crcount && !gdeleted && !sdeleted; | |
1327 | } | |
1328 | return 0; | |
1329 | } | |
1330 | ||
1331 | static int | |
1332 | mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted) | |
1333 | { | |
1334 | struct ip6_sf_list *psf; | |
1335 | int scount = 0; | |
1336 | ||
1337 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1338 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) | |
1339 | continue; | |
1340 | scount++; | |
1341 | } | |
1342 | return scount; | |
1343 | } | |
1344 | ||
1345 | static struct sk_buff *mld_newpack(struct net_device *dev, int size) | |
1346 | { | |
c346dca1 | 1347 | struct net *net = dev_net(dev); |
b8ad0cbc | 1348 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 LT |
1349 | struct sk_buff *skb; |
1350 | struct mld2_report *pmr; | |
1351 | struct in6_addr addr_buf; | |
d7aabf22 | 1352 | const struct in6_addr *saddr; |
1da177e4 LT |
1353 | int err; |
1354 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1355 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1356 | IPV6_TLV_PADN, 0 }; | |
1357 | ||
1358 | /* we assume size > sizeof(ra) here */ | |
72e09ad1 ED |
1359 | size += LL_ALLOCATED_SPACE(dev); |
1360 | /* limit our allocations to order-0 page */ | |
1361 | size = min_t(int, size, SKB_MAX_ORDER(0, 0)); | |
1362 | skb = sock_alloc_send_skb(sk, size, 1, &err); | |
1da177e4 | 1363 | |
cfcabdcc | 1364 | if (!skb) |
1da177e4 LT |
1365 | return NULL; |
1366 | ||
1367 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
1da177e4 | 1368 | |
95c385b4 | 1369 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1370 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1371 | * use unspecified address as the source address |
1da177e4 LT |
1372 | * when a valid link-local address is not available. |
1373 | */ | |
d7aabf22 YH |
1374 | saddr = &in6addr_any; |
1375 | } else | |
1376 | saddr = &addr_buf; | |
1da177e4 | 1377 | |
d7aabf22 | 1378 | ip6_nd_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0); |
1da177e4 LT |
1379 | |
1380 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1381 | ||
27a884dc | 1382 | skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data); |
d10ba34b ACM |
1383 | skb_put(skb, sizeof(*pmr)); |
1384 | pmr = (struct mld2_report *)skb_transport_header(skb); | |
6e7cb837 YH |
1385 | pmr->mld2r_type = ICMPV6_MLD2_REPORT; |
1386 | pmr->mld2r_resv1 = 0; | |
1387 | pmr->mld2r_cksum = 0; | |
1388 | pmr->mld2r_resv2 = 0; | |
1389 | pmr->mld2r_ngrec = 0; | |
1da177e4 LT |
1390 | return skb; |
1391 | } | |
1392 | ||
1393 | static void mld_sendpack(struct sk_buff *skb) | |
1394 | { | |
0660e03f | 1395 | struct ipv6hdr *pip6 = ipv6_hdr(skb); |
9c70220b ACM |
1396 | struct mld2_report *pmr = |
1397 | (struct mld2_report *)skb_transport_header(skb); | |
1da177e4 LT |
1398 | int payload_len, mldlen; |
1399 | struct inet6_dev *idev = in6_dev_get(skb->dev); | |
c346dca1 | 1400 | struct net *net = dev_net(skb->dev); |
1da177e4 | 1401 | int err; |
41927178 | 1402 | struct flowi fl; |
adf30907 | 1403 | struct dst_entry *dst; |
1da177e4 | 1404 | |
edf391ff NH |
1405 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len); |
1406 | ||
27a884dc ACM |
1407 | payload_len = (skb->tail - skb->network_header) - sizeof(*pip6); |
1408 | mldlen = skb->tail - skb->transport_header; | |
1da177e4 LT |
1409 | pip6->payload_len = htons(payload_len); |
1410 | ||
6e7cb837 YH |
1411 | pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen, |
1412 | IPPROTO_ICMPV6, | |
1413 | csum_partial(skb_transport_header(skb), | |
1414 | mldlen, 0)); | |
41927178 | 1415 | |
adf30907 | 1416 | dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr); |
41927178 | 1417 | |
adf30907 | 1418 | if (!dst) { |
41927178 YH |
1419 | err = -ENOMEM; |
1420 | goto err_out; | |
1421 | } | |
1422 | ||
b8ad0cbc | 1423 | icmpv6_flow_init(net->ipv6.igmp_sk, &fl, ICMPV6_MLD2_REPORT, |
41927178 YH |
1424 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1425 | skb->dev->ifindex); | |
1426 | ||
adf30907 ED |
1427 | err = xfrm_lookup(net, &dst, &fl, NULL, 0); |
1428 | skb_dst_set(skb, dst); | |
41927178 YH |
1429 | if (err) |
1430 | goto err_out; | |
1431 | ||
edf391ff NH |
1432 | payload_len = skb->len; |
1433 | ||
b2e0b385 | 1434 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
41927178 YH |
1435 | dst_output); |
1436 | out: | |
1da177e4 | 1437 | if (!err) { |
5a57d4c7 | 1438 | ICMP6MSGOUT_INC_STATS_BH(net, idev, ICMPV6_MLD2_REPORT); |
e41b5368 | 1439 | ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS); |
edf391ff | 1440 | IP6_UPD_PO_STATS_BH(net, idev, IPSTATS_MIB_OUTMCAST, payload_len); |
1da177e4 | 1441 | } else |
483a47d2 | 1442 | IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 LT |
1443 | |
1444 | if (likely(idev != NULL)) | |
1445 | in6_dev_put(idev); | |
41927178 YH |
1446 | return; |
1447 | ||
1448 | err_out: | |
1449 | kfree_skb(skb); | |
1450 | goto out; | |
1da177e4 LT |
1451 | } |
1452 | ||
1453 | static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel) | |
1454 | { | |
fab10fe3 | 1455 | return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel); |
1da177e4 LT |
1456 | } |
1457 | ||
1458 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1459 | int type, struct mld2_grec **ppgr) | |
1460 | { | |
1461 | struct net_device *dev = pmc->idev->dev; | |
1462 | struct mld2_report *pmr; | |
1463 | struct mld2_grec *pgr; | |
1464 | ||
1465 | if (!skb) | |
1466 | skb = mld_newpack(dev, dev->mtu); | |
1467 | if (!skb) | |
1468 | return NULL; | |
1469 | pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec)); | |
1470 | pgr->grec_type = type; | |
1471 | pgr->grec_auxwords = 0; | |
1472 | pgr->grec_nsrcs = 0; | |
1473 | pgr->grec_mca = pmc->mca_addr; /* structure copy */ | |
9c70220b | 1474 | pmr = (struct mld2_report *)skb_transport_header(skb); |
6e7cb837 | 1475 | pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1); |
1da177e4 LT |
1476 | *ppgr = pgr; |
1477 | return skb; | |
1478 | } | |
1479 | ||
1480 | #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \ | |
1481 | skb_tailroom(skb)) : 0) | |
1482 | ||
1483 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1484 | int type, int gdeleted, int sdeleted) | |
1485 | { | |
1486 | struct net_device *dev = pmc->idev->dev; | |
1487 | struct mld2_report *pmr; | |
1488 | struct mld2_grec *pgr = NULL; | |
1489 | struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list; | |
5ab4a6c8 | 1490 | int scount, stotal, first, isquery, truncate; |
1da177e4 LT |
1491 | |
1492 | if (pmc->mca_flags & MAF_NOREPORT) | |
1493 | return skb; | |
1494 | ||
1495 | isquery = type == MLD2_MODE_IS_INCLUDE || | |
1496 | type == MLD2_MODE_IS_EXCLUDE; | |
1497 | truncate = type == MLD2_MODE_IS_EXCLUDE || | |
1498 | type == MLD2_CHANGE_TO_EXCLUDE; | |
1499 | ||
5ab4a6c8 DS |
1500 | stotal = scount = 0; |
1501 | ||
1da177e4 LT |
1502 | psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources; |
1503 | ||
5ab4a6c8 DS |
1504 | if (!*psf_list) |
1505 | goto empty_source; | |
1506 | ||
9c70220b | 1507 | pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL; |
1da177e4 LT |
1508 | |
1509 | /* EX and TO_EX get a fresh packet, if needed */ | |
1510 | if (truncate) { | |
6e7cb837 | 1511 | if (pmr && pmr->mld2r_ngrec && |
1da177e4 LT |
1512 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { |
1513 | if (skb) | |
1514 | mld_sendpack(skb); | |
1515 | skb = mld_newpack(dev, dev->mtu); | |
1516 | } | |
1517 | } | |
1518 | first = 1; | |
1da177e4 LT |
1519 | psf_prev = NULL; |
1520 | for (psf=*psf_list; psf; psf=psf_next) { | |
1521 | struct in6_addr *psrc; | |
1522 | ||
1523 | psf_next = psf->sf_next; | |
1524 | ||
1525 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) { | |
1526 | psf_prev = psf; | |
1527 | continue; | |
1528 | } | |
1529 | ||
1530 | /* clear marks on query responses */ | |
1531 | if (isquery) | |
1532 | psf->sf_gsresp = 0; | |
1533 | ||
1534 | if (AVAILABLE(skb) < sizeof(*psrc) + | |
1535 | first*sizeof(struct mld2_grec)) { | |
1536 | if (truncate && !first) | |
1537 | break; /* truncate these */ | |
1538 | if (pgr) | |
1539 | pgr->grec_nsrcs = htons(scount); | |
1540 | if (skb) | |
1541 | mld_sendpack(skb); | |
1542 | skb = mld_newpack(dev, dev->mtu); | |
1543 | first = 1; | |
1544 | scount = 0; | |
1545 | } | |
1546 | if (first) { | |
1547 | skb = add_grhead(skb, pmc, type, &pgr); | |
1548 | first = 0; | |
1549 | } | |
cc63f70b AD |
1550 | if (!skb) |
1551 | return NULL; | |
1da177e4 LT |
1552 | psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc)); |
1553 | *psrc = psf->sf_addr; | |
5ab4a6c8 | 1554 | scount++; stotal++; |
1da177e4 LT |
1555 | if ((type == MLD2_ALLOW_NEW_SOURCES || |
1556 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) { | |
1557 | psf->sf_crcount--; | |
1558 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { | |
1559 | if (psf_prev) | |
1560 | psf_prev->sf_next = psf->sf_next; | |
1561 | else | |
1562 | *psf_list = psf->sf_next; | |
1563 | kfree(psf); | |
1564 | continue; | |
1565 | } | |
1566 | } | |
1567 | psf_prev = psf; | |
1568 | } | |
5ab4a6c8 DS |
1569 | |
1570 | empty_source: | |
1571 | if (!stotal) { | |
1572 | if (type == MLD2_ALLOW_NEW_SOURCES || | |
1573 | type == MLD2_BLOCK_OLD_SOURCES) | |
1574 | return skb; | |
1575 | if (pmc->mca_crcount || isquery) { | |
1576 | /* make sure we have room for group header */ | |
1577 | if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) { | |
1578 | mld_sendpack(skb); | |
1579 | skb = NULL; /* add_grhead will get a new one */ | |
1580 | } | |
1581 | skb = add_grhead(skb, pmc, type, &pgr); | |
1582 | } | |
1583 | } | |
1da177e4 LT |
1584 | if (pgr) |
1585 | pgr->grec_nsrcs = htons(scount); | |
1586 | ||
1587 | if (isquery) | |
1588 | pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */ | |
1589 | return skb; | |
1590 | } | |
1591 | ||
1592 | static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc) | |
1593 | { | |
1594 | struct sk_buff *skb = NULL; | |
1595 | int type; | |
1596 | ||
1597 | if (!pmc) { | |
1598 | read_lock_bh(&idev->lock); | |
1599 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1600 | if (pmc->mca_flags & MAF_NOREPORT) | |
1601 | continue; | |
1602 | spin_lock_bh(&pmc->mca_lock); | |
1603 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1604 | type = MLD2_MODE_IS_EXCLUDE; | |
1605 | else | |
1606 | type = MLD2_MODE_IS_INCLUDE; | |
1607 | skb = add_grec(skb, pmc, type, 0, 0); | |
1608 | spin_unlock_bh(&pmc->mca_lock); | |
1609 | } | |
1610 | read_unlock_bh(&idev->lock); | |
1611 | } else { | |
1612 | spin_lock_bh(&pmc->mca_lock); | |
1613 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1614 | type = MLD2_MODE_IS_EXCLUDE; | |
1615 | else | |
1616 | type = MLD2_MODE_IS_INCLUDE; | |
1617 | skb = add_grec(skb, pmc, type, 0, 0); | |
1618 | spin_unlock_bh(&pmc->mca_lock); | |
1619 | } | |
1620 | if (skb) | |
1621 | mld_sendpack(skb); | |
1622 | } | |
1623 | ||
1624 | /* | |
1625 | * remove zero-count source records from a source filter list | |
1626 | */ | |
1627 | static void mld_clear_zeros(struct ip6_sf_list **ppsf) | |
1628 | { | |
1629 | struct ip6_sf_list *psf_prev, *psf_next, *psf; | |
1630 | ||
1631 | psf_prev = NULL; | |
1632 | for (psf=*ppsf; psf; psf = psf_next) { | |
1633 | psf_next = psf->sf_next; | |
1634 | if (psf->sf_crcount == 0) { | |
1635 | if (psf_prev) | |
1636 | psf_prev->sf_next = psf->sf_next; | |
1637 | else | |
1638 | *ppsf = psf->sf_next; | |
1639 | kfree(psf); | |
1640 | } else | |
1641 | psf_prev = psf; | |
1642 | } | |
1643 | } | |
1644 | ||
1645 | static void mld_send_cr(struct inet6_dev *idev) | |
1646 | { | |
1647 | struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next; | |
1648 | struct sk_buff *skb = NULL; | |
1649 | int type, dtype; | |
1650 | ||
1651 | read_lock_bh(&idev->lock); | |
6457d26b | 1652 | spin_lock(&idev->mc_lock); |
1da177e4 LT |
1653 | |
1654 | /* deleted MCA's */ | |
1655 | pmc_prev = NULL; | |
1656 | for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) { | |
1657 | pmc_next = pmc->next; | |
1658 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
1659 | type = MLD2_BLOCK_OLD_SOURCES; | |
1660 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1661 | skb = add_grec(skb, pmc, type, 1, 0); | |
1662 | skb = add_grec(skb, pmc, dtype, 1, 1); | |
1663 | } | |
1664 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1665 | if (pmc->mca_sfmode == MCAST_EXCLUDE) { |
1666 | type = MLD2_CHANGE_TO_INCLUDE; | |
1667 | skb = add_grec(skb, pmc, type, 1, 0); | |
1668 | } | |
5ab4a6c8 | 1669 | pmc->mca_crcount--; |
1da177e4 LT |
1670 | if (pmc->mca_crcount == 0) { |
1671 | mld_clear_zeros(&pmc->mca_tomb); | |
1672 | mld_clear_zeros(&pmc->mca_sources); | |
1673 | } | |
1674 | } | |
1675 | if (pmc->mca_crcount == 0 && !pmc->mca_tomb && | |
1676 | !pmc->mca_sources) { | |
1677 | if (pmc_prev) | |
1678 | pmc_prev->next = pmc_next; | |
1679 | else | |
1680 | idev->mc_tomb = pmc_next; | |
1681 | in6_dev_put(pmc->idev); | |
1682 | kfree(pmc); | |
1683 | } else | |
1684 | pmc_prev = pmc; | |
1685 | } | |
6457d26b | 1686 | spin_unlock(&idev->mc_lock); |
1da177e4 LT |
1687 | |
1688 | /* change recs */ | |
1689 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1690 | spin_lock_bh(&pmc->mca_lock); | |
1691 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1692 | type = MLD2_BLOCK_OLD_SOURCES; | |
1693 | dtype = MLD2_ALLOW_NEW_SOURCES; | |
1694 | } else { | |
1695 | type = MLD2_ALLOW_NEW_SOURCES; | |
1696 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1697 | } | |
1698 | skb = add_grec(skb, pmc, type, 0, 0); | |
1699 | skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */ | |
1700 | ||
1701 | /* filter mode changes */ | |
1702 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1703 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
1704 | type = MLD2_CHANGE_TO_EXCLUDE; | |
1705 | else | |
1706 | type = MLD2_CHANGE_TO_INCLUDE; | |
1707 | skb = add_grec(skb, pmc, type, 0, 0); | |
5ab4a6c8 | 1708 | pmc->mca_crcount--; |
1da177e4 LT |
1709 | } |
1710 | spin_unlock_bh(&pmc->mca_lock); | |
1711 | } | |
1712 | read_unlock_bh(&idev->lock); | |
1713 | if (!skb) | |
1714 | return; | |
1715 | (void) mld_sendpack(skb); | |
1716 | } | |
1717 | ||
1718 | static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type) | |
1719 | { | |
c346dca1 | 1720 | struct net *net = dev_net(dev); |
b8ad0cbc | 1721 | struct sock *sk = net->ipv6.igmp_sk; |
1da177e4 | 1722 | struct inet6_dev *idev; |
1ab1457c | 1723 | struct sk_buff *skb; |
6e7cb837 | 1724 | struct mld_msg *hdr; |
d7aabf22 | 1725 | const struct in6_addr *snd_addr, *saddr; |
1da177e4 | 1726 | struct in6_addr addr_buf; |
1da177e4 LT |
1727 | int err, len, payload_len, full_len; |
1728 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1729 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1730 | IPV6_TLV_PADN, 0 }; | |
41927178 | 1731 | struct flowi fl; |
adf30907 | 1732 | struct dst_entry *dst; |
1da177e4 | 1733 | |
f3ee4010 YH |
1734 | if (type == ICMPV6_MGM_REDUCTION) |
1735 | snd_addr = &in6addr_linklocal_allrouters; | |
1736 | else | |
1737 | snd_addr = addr; | |
1da177e4 LT |
1738 | |
1739 | len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); | |
1740 | payload_len = len + sizeof(ra); | |
1741 | full_len = sizeof(struct ipv6hdr) + payload_len; | |
1742 | ||
edf391ff NH |
1743 | rcu_read_lock(); |
1744 | IP6_UPD_PO_STATS(net, __in6_dev_get(dev), | |
1745 | IPSTATS_MIB_OUT, full_len); | |
1746 | rcu_read_unlock(); | |
1747 | ||
f5184d26 | 1748 | skb = sock_alloc_send_skb(sk, LL_ALLOCATED_SPACE(dev) + full_len, 1, &err); |
1da177e4 LT |
1749 | |
1750 | if (skb == NULL) { | |
a11d206d | 1751 | rcu_read_lock(); |
3bd653c8 | 1752 | IP6_INC_STATS(net, __in6_dev_get(dev), |
a11d206d YH |
1753 | IPSTATS_MIB_OUTDISCARDS); |
1754 | rcu_read_unlock(); | |
1da177e4 LT |
1755 | return; |
1756 | } | |
1757 | ||
1758 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
1da177e4 | 1759 | |
95c385b4 | 1760 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1761 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1762 | * use unspecified address as the source address |
1da177e4 LT |
1763 | * when a valid link-local address is not available. |
1764 | */ | |
d7aabf22 YH |
1765 | saddr = &in6addr_any; |
1766 | } else | |
1767 | saddr = &addr_buf; | |
1da177e4 | 1768 | |
d7aabf22 | 1769 | ip6_nd_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len); |
1da177e4 LT |
1770 | |
1771 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1772 | ||
6e7cb837 YH |
1773 | hdr = (struct mld_msg *) skb_put(skb, sizeof(struct mld_msg)); |
1774 | memset(hdr, 0, sizeof(struct mld_msg)); | |
1775 | hdr->mld_type = type; | |
1776 | ipv6_addr_copy(&hdr->mld_mca, addr); | |
1da177e4 | 1777 | |
6e7cb837 YH |
1778 | hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len, |
1779 | IPPROTO_ICMPV6, | |
1780 | csum_partial(hdr, len, 0)); | |
1da177e4 LT |
1781 | |
1782 | idev = in6_dev_get(skb->dev); | |
1783 | ||
adf30907 ED |
1784 | dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr); |
1785 | if (!dst) { | |
41927178 YH |
1786 | err = -ENOMEM; |
1787 | goto err_out; | |
1788 | } | |
1789 | ||
b8ad0cbc | 1790 | icmpv6_flow_init(sk, &fl, type, |
41927178 YH |
1791 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1792 | skb->dev->ifindex); | |
1793 | ||
adf30907 | 1794 | err = xfrm_lookup(net, &dst, &fl, NULL, 0); |
41927178 YH |
1795 | if (err) |
1796 | goto err_out; | |
1797 | ||
adf30907 | 1798 | skb_dst_set(skb, dst); |
b2e0b385 | 1799 | err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
41927178 YH |
1800 | dst_output); |
1801 | out: | |
1da177e4 | 1802 | if (!err) { |
5c5d244b | 1803 | ICMP6MSGOUT_INC_STATS(net, idev, type); |
a862f6a6 | 1804 | ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS); |
edf391ff | 1805 | IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUTMCAST, full_len); |
1da177e4 | 1806 | } else |
3bd653c8 | 1807 | IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 LT |
1808 | |
1809 | if (likely(idev != NULL)) | |
1810 | in6_dev_put(idev); | |
1811 | return; | |
41927178 YH |
1812 | |
1813 | err_out: | |
1814 | kfree_skb(skb); | |
1815 | goto out; | |
1da177e4 LT |
1816 | } |
1817 | ||
1818 | static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode, | |
1819 | struct in6_addr *psfsrc) | |
1820 | { | |
1821 | struct ip6_sf_list *psf, *psf_prev; | |
1822 | int rv = 0; | |
1823 | ||
1824 | psf_prev = NULL; | |
1825 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1826 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) | |
1827 | break; | |
1828 | psf_prev = psf; | |
1829 | } | |
1830 | if (!psf || psf->sf_count[sfmode] == 0) { | |
1831 | /* source filter not found, or count wrong => bug */ | |
1832 | return -ESRCH; | |
1833 | } | |
1834 | psf->sf_count[sfmode]--; | |
1835 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { | |
1836 | struct inet6_dev *idev = pmc->idev; | |
1837 | ||
1838 | /* no more filters for this source */ | |
1839 | if (psf_prev) | |
1840 | psf_prev->sf_next = psf->sf_next; | |
1841 | else | |
1842 | pmc->mca_sources = psf->sf_next; | |
1843 | if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) && | |
1844 | !MLD_V1_SEEN(idev)) { | |
1845 | psf->sf_crcount = idev->mc_qrv; | |
1846 | psf->sf_next = pmc->mca_tomb; | |
1847 | pmc->mca_tomb = psf; | |
1848 | rv = 1; | |
1849 | } else | |
1850 | kfree(psf); | |
1851 | } | |
1852 | return rv; | |
1853 | } | |
1854 | ||
1855 | static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
1856 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
1857 | int delta) | |
1858 | { | |
1859 | struct ifmcaddr6 *pmc; | |
1860 | int changerec = 0; | |
1861 | int i, err; | |
1862 | ||
1863 | if (!idev) | |
1864 | return -ENODEV; | |
1865 | read_lock_bh(&idev->lock); | |
1866 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1867 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) | |
1868 | break; | |
1869 | } | |
1870 | if (!pmc) { | |
1871 | /* MCA not found?? bug */ | |
1872 | read_unlock_bh(&idev->lock); | |
1873 | return -ESRCH; | |
1874 | } | |
1875 | spin_lock_bh(&pmc->mca_lock); | |
1876 | sf_markstate(pmc); | |
1877 | if (!delta) { | |
1878 | if (!pmc->mca_sfcount[sfmode]) { | |
1879 | spin_unlock_bh(&pmc->mca_lock); | |
1880 | read_unlock_bh(&idev->lock); | |
1881 | return -EINVAL; | |
1882 | } | |
1883 | pmc->mca_sfcount[sfmode]--; | |
1884 | } | |
1885 | err = 0; | |
1886 | for (i=0; i<sfcount; i++) { | |
1887 | int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); | |
1888 | ||
1889 | changerec |= rv > 0; | |
1890 | if (!err && rv < 0) | |
1891 | err = rv; | |
1892 | } | |
1893 | if (pmc->mca_sfmode == MCAST_EXCLUDE && | |
1894 | pmc->mca_sfcount[MCAST_EXCLUDE] == 0 && | |
1895 | pmc->mca_sfcount[MCAST_INCLUDE]) { | |
1896 | struct ip6_sf_list *psf; | |
1897 | ||
1898 | /* filter mode change */ | |
1899 | pmc->mca_sfmode = MCAST_INCLUDE; | |
1900 | pmc->mca_crcount = idev->mc_qrv; | |
1901 | idev->mc_ifc_count = pmc->mca_crcount; | |
1902 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) | |
1903 | psf->sf_crcount = 0; | |
1904 | mld_ifc_event(pmc->idev); | |
1905 | } else if (sf_setstate(pmc) || changerec) | |
1906 | mld_ifc_event(pmc->idev); | |
1907 | spin_unlock_bh(&pmc->mca_lock); | |
1908 | read_unlock_bh(&idev->lock); | |
1909 | return err; | |
1910 | } | |
1911 | ||
1912 | /* | |
1913 | * Add multicast single-source filter to the interface list | |
1914 | */ | |
1915 | static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode, | |
1916 | struct in6_addr *psfsrc, int delta) | |
1917 | { | |
1918 | struct ip6_sf_list *psf, *psf_prev; | |
1919 | ||
1920 | psf_prev = NULL; | |
1921 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1922 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) | |
1923 | break; | |
1924 | psf_prev = psf; | |
1925 | } | |
1926 | if (!psf) { | |
0c600eda | 1927 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
1da177e4 LT |
1928 | if (!psf) |
1929 | return -ENOBUFS; | |
0c600eda | 1930 | |
1da177e4 LT |
1931 | psf->sf_addr = *psfsrc; |
1932 | if (psf_prev) { | |
1933 | psf_prev->sf_next = psf; | |
1934 | } else | |
1935 | pmc->mca_sources = psf; | |
1936 | } | |
1937 | psf->sf_count[sfmode]++; | |
1938 | return 0; | |
1939 | } | |
1940 | ||
1941 | static void sf_markstate(struct ifmcaddr6 *pmc) | |
1942 | { | |
1943 | struct ip6_sf_list *psf; | |
1944 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; | |
1945 | ||
1946 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) | |
1947 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1948 | psf->sf_oldin = mca_xcount == | |
1949 | psf->sf_count[MCAST_EXCLUDE] && | |
1950 | !psf->sf_count[MCAST_INCLUDE]; | |
1951 | } else | |
1952 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; | |
1953 | } | |
1954 | ||
1955 | static int sf_setstate(struct ifmcaddr6 *pmc) | |
1956 | { | |
7add2a43 | 1957 | struct ip6_sf_list *psf, *dpsf; |
1da177e4 LT |
1958 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
1959 | int qrv = pmc->idev->mc_qrv; | |
1960 | int new_in, rv; | |
1961 | ||
1962 | rv = 0; | |
1963 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1964 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1965 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && | |
1966 | !psf->sf_count[MCAST_INCLUDE]; | |
1967 | } else | |
1968 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; | |
7add2a43 DS |
1969 | if (new_in) { |
1970 | if (!psf->sf_oldin) { | |
e80e28b6 | 1971 | struct ip6_sf_list *prev = NULL; |
7add2a43 DS |
1972 | |
1973 | for (dpsf=pmc->mca_tomb; dpsf; | |
1974 | dpsf=dpsf->sf_next) { | |
1975 | if (ipv6_addr_equal(&dpsf->sf_addr, | |
1976 | &psf->sf_addr)) | |
1977 | break; | |
1978 | prev = dpsf; | |
1979 | } | |
1980 | if (dpsf) { | |
1981 | if (prev) | |
1982 | prev->sf_next = dpsf->sf_next; | |
1983 | else | |
1984 | pmc->mca_tomb = dpsf->sf_next; | |
1985 | kfree(dpsf); | |
1986 | } | |
1987 | psf->sf_crcount = qrv; | |
1988 | rv++; | |
1989 | } | |
1990 | } else if (psf->sf_oldin) { | |
1991 | psf->sf_crcount = 0; | |
1992 | /* | |
1993 | * add or update "delete" records if an active filter | |
1994 | * is now inactive | |
1995 | */ | |
1996 | for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next) | |
1997 | if (ipv6_addr_equal(&dpsf->sf_addr, | |
1998 | &psf->sf_addr)) | |
1999 | break; | |
2000 | if (!dpsf) { | |
5d55354f | 2001 | dpsf = kmalloc(sizeof(*dpsf), GFP_ATOMIC); |
7add2a43 DS |
2002 | if (!dpsf) |
2003 | continue; | |
2004 | *dpsf = *psf; | |
2005 | /* pmc->mca_lock held by callers */ | |
2006 | dpsf->sf_next = pmc->mca_tomb; | |
2007 | pmc->mca_tomb = dpsf; | |
2008 | } | |
2009 | dpsf->sf_crcount = qrv; | |
1da177e4 LT |
2010 | rv++; |
2011 | } | |
2012 | } | |
2013 | return rv; | |
2014 | } | |
2015 | ||
2016 | /* | |
2017 | * Add multicast source filter list to the interface list | |
2018 | */ | |
2019 | static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
2020 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
2021 | int delta) | |
2022 | { | |
2023 | struct ifmcaddr6 *pmc; | |
2024 | int isexclude; | |
2025 | int i, err; | |
2026 | ||
2027 | if (!idev) | |
2028 | return -ENODEV; | |
2029 | read_lock_bh(&idev->lock); | |
2030 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
2031 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) | |
2032 | break; | |
2033 | } | |
2034 | if (!pmc) { | |
2035 | /* MCA not found?? bug */ | |
2036 | read_unlock_bh(&idev->lock); | |
2037 | return -ESRCH; | |
2038 | } | |
2039 | spin_lock_bh(&pmc->mca_lock); | |
2040 | ||
2041 | sf_markstate(pmc); | |
2042 | isexclude = pmc->mca_sfmode == MCAST_EXCLUDE; | |
2043 | if (!delta) | |
2044 | pmc->mca_sfcount[sfmode]++; | |
2045 | err = 0; | |
2046 | for (i=0; i<sfcount; i++) { | |
2047 | err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta); | |
2048 | if (err) | |
2049 | break; | |
2050 | } | |
2051 | if (err) { | |
2052 | int j; | |
2053 | ||
2054 | if (!delta) | |
2055 | pmc->mca_sfcount[sfmode]--; | |
2056 | for (j=0; j<i; j++) | |
2057 | (void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); | |
2058 | } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) { | |
1da177e4 LT |
2059 | struct ip6_sf_list *psf; |
2060 | ||
2061 | /* filter mode change */ | |
2062 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2063 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
2064 | else if (pmc->mca_sfcount[MCAST_INCLUDE]) | |
2065 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2066 | /* else no filters; keep old mode for reports */ | |
2067 | ||
2068 | pmc->mca_crcount = idev->mc_qrv; | |
2069 | idev->mc_ifc_count = pmc->mca_crcount; | |
2070 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) | |
2071 | psf->sf_crcount = 0; | |
2072 | mld_ifc_event(idev); | |
2073 | } else if (sf_setstate(pmc)) | |
2074 | mld_ifc_event(idev); | |
2075 | spin_unlock_bh(&pmc->mca_lock); | |
2076 | read_unlock_bh(&idev->lock); | |
2077 | return err; | |
2078 | } | |
2079 | ||
2080 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc) | |
2081 | { | |
2082 | struct ip6_sf_list *psf, *nextpsf; | |
2083 | ||
2084 | for (psf=pmc->mca_tomb; psf; psf=nextpsf) { | |
2085 | nextpsf = psf->sf_next; | |
2086 | kfree(psf); | |
2087 | } | |
2088 | pmc->mca_tomb = NULL; | |
2089 | for (psf=pmc->mca_sources; psf; psf=nextpsf) { | |
2090 | nextpsf = psf->sf_next; | |
2091 | kfree(psf); | |
2092 | } | |
2093 | pmc->mca_sources = NULL; | |
2094 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
de9daad9 | 2095 | pmc->mca_sfcount[MCAST_INCLUDE] = 0; |
1da177e4 LT |
2096 | pmc->mca_sfcount[MCAST_EXCLUDE] = 1; |
2097 | } | |
2098 | ||
2099 | ||
2100 | static void igmp6_join_group(struct ifmcaddr6 *ma) | |
2101 | { | |
2102 | unsigned long delay; | |
2103 | ||
2104 | if (ma->mca_flags & MAF_NOREPORT) | |
2105 | return; | |
2106 | ||
2107 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2108 | ||
2109 | delay = net_random() % IGMP6_UNSOLICITED_IVAL; | |
2110 | ||
2111 | spin_lock_bh(&ma->mca_lock); | |
2112 | if (del_timer(&ma->mca_timer)) { | |
2113 | atomic_dec(&ma->mca_refcnt); | |
2114 | delay = ma->mca_timer.expires - jiffies; | |
2115 | } | |
2116 | ||
2117 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
2118 | atomic_inc(&ma->mca_refcnt); | |
2119 | ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER; | |
2120 | spin_unlock_bh(&ma->mca_lock); | |
2121 | } | |
2122 | ||
2123 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
2124 | struct inet6_dev *idev) | |
2125 | { | |
2126 | int err; | |
2127 | ||
5ab4a6c8 DS |
2128 | /* callers have the socket lock and a write lock on ipv6_sk_mc_lock, |
2129 | * so no other readers or writers of iml or its sflist | |
2130 | */ | |
cfcabdcc | 2131 | if (!iml->sflist) { |
1da177e4 LT |
2132 | /* any-source empty exclude case */ |
2133 | return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0); | |
2134 | } | |
2135 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, | |
2136 | iml->sflist->sl_count, iml->sflist->sl_addr, 0); | |
2137 | sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max)); | |
2138 | iml->sflist = NULL; | |
2139 | return err; | |
2140 | } | |
2141 | ||
2142 | static void igmp6_leave_group(struct ifmcaddr6 *ma) | |
2143 | { | |
2144 | if (MLD_V1_SEEN(ma->idev)) { | |
2145 | if (ma->mca_flags & MAF_LAST_REPORTER) | |
2146 | igmp6_send(&ma->mca_addr, ma->idev->dev, | |
2147 | ICMPV6_MGM_REDUCTION); | |
2148 | } else { | |
2149 | mld_add_delrec(ma->idev, ma); | |
2150 | mld_ifc_event(ma->idev); | |
2151 | } | |
2152 | } | |
2153 | ||
2154 | static void mld_gq_timer_expire(unsigned long data) | |
2155 | { | |
2156 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2157 | ||
2158 | idev->mc_gq_running = 0; | |
2159 | mld_send_report(idev, NULL); | |
2160 | __in6_dev_put(idev); | |
2161 | } | |
2162 | ||
2163 | static void mld_ifc_timer_expire(unsigned long data) | |
2164 | { | |
2165 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2166 | ||
2167 | mld_send_cr(idev); | |
2168 | if (idev->mc_ifc_count) { | |
2169 | idev->mc_ifc_count--; | |
2170 | if (idev->mc_ifc_count) | |
2171 | mld_ifc_start_timer(idev, idev->mc_maxdelay); | |
2172 | } | |
2173 | __in6_dev_put(idev); | |
2174 | } | |
2175 | ||
2176 | static void mld_ifc_event(struct inet6_dev *idev) | |
2177 | { | |
2178 | if (MLD_V1_SEEN(idev)) | |
2179 | return; | |
2180 | idev->mc_ifc_count = idev->mc_qrv; | |
2181 | mld_ifc_start_timer(idev, 1); | |
2182 | } | |
2183 | ||
2184 | ||
2185 | static void igmp6_timer_handler(unsigned long data) | |
2186 | { | |
2187 | struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data; | |
2188 | ||
2189 | if (MLD_V1_SEEN(ma->idev)) | |
2190 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2191 | else | |
2192 | mld_send_report(ma->idev, ma); | |
2193 | ||
2194 | spin_lock(&ma->mca_lock); | |
2195 | ma->mca_flags |= MAF_LAST_REPORTER; | |
2196 | ma->mca_flags &= ~MAF_TIMER_RUNNING; | |
2197 | spin_unlock(&ma->mca_lock); | |
2198 | ma_put(ma); | |
2199 | } | |
2200 | ||
75c78500 MS |
2201 | /* Device changing type */ |
2202 | ||
2203 | void ipv6_mc_unmap(struct inet6_dev *idev) | |
2204 | { | |
2205 | struct ifmcaddr6 *i; | |
2206 | ||
2207 | /* Install multicast list, except for all-nodes (already installed) */ | |
2208 | ||
2209 | read_lock_bh(&idev->lock); | |
2210 | for (i = idev->mc_list; i; i = i->next) | |
2211 | igmp6_group_dropped(i); | |
2212 | read_unlock_bh(&idev->lock); | |
2213 | } | |
2214 | ||
2215 | void ipv6_mc_remap(struct inet6_dev *idev) | |
2216 | { | |
2217 | ipv6_mc_up(idev); | |
2218 | } | |
2219 | ||
1da177e4 LT |
2220 | /* Device going down */ |
2221 | ||
2222 | void ipv6_mc_down(struct inet6_dev *idev) | |
2223 | { | |
2224 | struct ifmcaddr6 *i; | |
2225 | ||
2226 | /* Withdraw multicast list */ | |
2227 | ||
2228 | read_lock_bh(&idev->lock); | |
2229 | idev->mc_ifc_count = 0; | |
2230 | if (del_timer(&idev->mc_ifc_timer)) | |
2231 | __in6_dev_put(idev); | |
2232 | idev->mc_gq_running = 0; | |
2233 | if (del_timer(&idev->mc_gq_timer)) | |
2234 | __in6_dev_put(idev); | |
2235 | ||
2236 | for (i = idev->mc_list; i; i=i->next) | |
2237 | igmp6_group_dropped(i); | |
2238 | read_unlock_bh(&idev->lock); | |
2239 | ||
2240 | mld_clear_delrec(idev); | |
2241 | } | |
2242 | ||
2243 | ||
2244 | /* Device going up */ | |
2245 | ||
2246 | void ipv6_mc_up(struct inet6_dev *idev) | |
2247 | { | |
2248 | struct ifmcaddr6 *i; | |
2249 | ||
2250 | /* Install multicast list, except for all-nodes (already installed) */ | |
2251 | ||
2252 | read_lock_bh(&idev->lock); | |
2253 | for (i = idev->mc_list; i; i=i->next) | |
2254 | igmp6_group_added(i); | |
2255 | read_unlock_bh(&idev->lock); | |
2256 | } | |
2257 | ||
2258 | /* IPv6 device initialization. */ | |
2259 | ||
2260 | void ipv6_mc_init_dev(struct inet6_dev *idev) | |
2261 | { | |
1da177e4 | 2262 | write_lock_bh(&idev->lock); |
6457d26b | 2263 | spin_lock_init(&idev->mc_lock); |
1da177e4 | 2264 | idev->mc_gq_running = 0; |
b24b8a24 PE |
2265 | setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire, |
2266 | (unsigned long)idev); | |
1da177e4 LT |
2267 | idev->mc_tomb = NULL; |
2268 | idev->mc_ifc_count = 0; | |
b24b8a24 PE |
2269 | setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire, |
2270 | (unsigned long)idev); | |
1da177e4 LT |
2271 | idev->mc_qrv = MLD_QRV_DEFAULT; |
2272 | idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL; | |
2273 | idev->mc_v1_seen = 0; | |
2274 | write_unlock_bh(&idev->lock); | |
1da177e4 LT |
2275 | } |
2276 | ||
2277 | /* | |
2278 | * Device is about to be destroyed: clean up. | |
2279 | */ | |
2280 | ||
2281 | void ipv6_mc_destroy_dev(struct inet6_dev *idev) | |
2282 | { | |
2283 | struct ifmcaddr6 *i; | |
1da177e4 LT |
2284 | |
2285 | /* Deactivate timers */ | |
2286 | ipv6_mc_down(idev); | |
2287 | ||
2288 | /* Delete all-nodes address. */ | |
1da177e4 LT |
2289 | /* We cannot call ipv6_dev_mc_dec() directly, our caller in |
2290 | * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will | |
2291 | * fail. | |
2292 | */ | |
f3ee4010 | 2293 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes); |
1da177e4 | 2294 | |
f3ee4010 YH |
2295 | if (idev->cnf.forwarding) |
2296 | __ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters); | |
1da177e4 LT |
2297 | |
2298 | write_lock_bh(&idev->lock); | |
2299 | while ((i = idev->mc_list) != NULL) { | |
2300 | idev->mc_list = i->next; | |
2301 | write_unlock_bh(&idev->lock); | |
2302 | ||
2303 | igmp6_group_dropped(i); | |
2304 | ma_put(i); | |
2305 | ||
2306 | write_lock_bh(&idev->lock); | |
2307 | } | |
2308 | write_unlock_bh(&idev->lock); | |
2309 | } | |
2310 | ||
2311 | #ifdef CONFIG_PROC_FS | |
2312 | struct igmp6_mc_iter_state { | |
b8ad0cbc | 2313 | struct seq_net_private p; |
1da177e4 LT |
2314 | struct net_device *dev; |
2315 | struct inet6_dev *idev; | |
2316 | }; | |
2317 | ||
2318 | #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private) | |
2319 | ||
2320 | static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq) | |
2321 | { | |
2322 | struct ifmcaddr6 *im = NULL; | |
2323 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
1218854a | 2324 | struct net *net = seq_file_net(seq); |
1da177e4 | 2325 | |
7562f876 | 2326 | state->idev = NULL; |
ce81b76a | 2327 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2328 | struct inet6_dev *idev; |
ce81b76a | 2329 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2330 | if (!idev) |
2331 | continue; | |
2332 | read_lock_bh(&idev->lock); | |
2333 | im = idev->mc_list; | |
2334 | if (im) { | |
2335 | state->idev = idev; | |
2336 | break; | |
2337 | } | |
2338 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2339 | } |
2340 | return im; | |
2341 | } | |
2342 | ||
2343 | static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im) | |
2344 | { | |
2345 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2346 | ||
2347 | im = im->next; | |
2348 | while (!im) { | |
ce81b76a | 2349 | if (likely(state->idev != NULL)) |
1da177e4 | 2350 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2351 | |
2352 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2353 | if (!state->dev) { |
2354 | state->idev = NULL; | |
2355 | break; | |
2356 | } | |
ce81b76a | 2357 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2358 | if (!state->idev) |
2359 | continue; | |
2360 | read_lock_bh(&state->idev->lock); | |
2361 | im = state->idev->mc_list; | |
2362 | } | |
2363 | return im; | |
2364 | } | |
2365 | ||
2366 | static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos) | |
2367 | { | |
2368 | struct ifmcaddr6 *im = igmp6_mc_get_first(seq); | |
2369 | if (im) | |
2370 | while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL) | |
2371 | --pos; | |
2372 | return pos ? NULL : im; | |
2373 | } | |
2374 | ||
2375 | static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2376 | __acquires(RCU) |
1da177e4 | 2377 | { |
ce81b76a | 2378 | rcu_read_lock(); |
1da177e4 LT |
2379 | return igmp6_mc_get_idx(seq, *pos); |
2380 | } | |
2381 | ||
2382 | static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2383 | { | |
ce81b76a ED |
2384 | struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v); |
2385 | ||
1da177e4 LT |
2386 | ++*pos; |
2387 | return im; | |
2388 | } | |
2389 | ||
2390 | static void igmp6_mc_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2391 | __releases(RCU) |
1da177e4 LT |
2392 | { |
2393 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
ce81b76a | 2394 | |
1da177e4 LT |
2395 | if (likely(state->idev != NULL)) { |
2396 | read_unlock_bh(&state->idev->lock); | |
1da177e4 LT |
2397 | state->idev = NULL; |
2398 | } | |
2399 | state->dev = NULL; | |
ce81b76a | 2400 | rcu_read_unlock(); |
1da177e4 LT |
2401 | } |
2402 | ||
2403 | static int igmp6_mc_seq_show(struct seq_file *seq, void *v) | |
2404 | { | |
2405 | struct ifmcaddr6 *im = (struct ifmcaddr6 *)v; | |
2406 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2407 | ||
2408 | seq_printf(seq, | |
4b7a4274 | 2409 | "%-4d %-15s %pi6 %5d %08X %ld\n", |
1da177e4 | 2410 | state->dev->ifindex, state->dev->name, |
b071195d | 2411 | &im->mca_addr, |
1da177e4 LT |
2412 | im->mca_users, im->mca_flags, |
2413 | (im->mca_flags&MAF_TIMER_RUNNING) ? | |
2414 | jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0); | |
2415 | return 0; | |
2416 | } | |
2417 | ||
56b3d975 | 2418 | static const struct seq_operations igmp6_mc_seq_ops = { |
1da177e4 LT |
2419 | .start = igmp6_mc_seq_start, |
2420 | .next = igmp6_mc_seq_next, | |
2421 | .stop = igmp6_mc_seq_stop, | |
2422 | .show = igmp6_mc_seq_show, | |
2423 | }; | |
2424 | ||
2425 | static int igmp6_mc_seq_open(struct inode *inode, struct file *file) | |
2426 | { | |
b8ad0cbc DL |
2427 | return seq_open_net(inode, file, &igmp6_mc_seq_ops, |
2428 | sizeof(struct igmp6_mc_iter_state)); | |
1da177e4 LT |
2429 | } |
2430 | ||
9a32144e | 2431 | static const struct file_operations igmp6_mc_seq_fops = { |
1da177e4 LT |
2432 | .owner = THIS_MODULE, |
2433 | .open = igmp6_mc_seq_open, | |
2434 | .read = seq_read, | |
2435 | .llseek = seq_lseek, | |
b8ad0cbc | 2436 | .release = seq_release_net, |
1da177e4 LT |
2437 | }; |
2438 | ||
2439 | struct igmp6_mcf_iter_state { | |
b8ad0cbc | 2440 | struct seq_net_private p; |
1da177e4 LT |
2441 | struct net_device *dev; |
2442 | struct inet6_dev *idev; | |
2443 | struct ifmcaddr6 *im; | |
2444 | }; | |
2445 | ||
2446 | #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private) | |
2447 | ||
2448 | static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq) | |
2449 | { | |
2450 | struct ip6_sf_list *psf = NULL; | |
2451 | struct ifmcaddr6 *im = NULL; | |
2452 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
1218854a | 2453 | struct net *net = seq_file_net(seq); |
1da177e4 | 2454 | |
7562f876 PE |
2455 | state->idev = NULL; |
2456 | state->im = NULL; | |
ce81b76a | 2457 | for_each_netdev_rcu(net, state->dev) { |
1da177e4 | 2458 | struct inet6_dev *idev; |
ce81b76a | 2459 | idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2460 | if (unlikely(idev == NULL)) |
2461 | continue; | |
2462 | read_lock_bh(&idev->lock); | |
2463 | im = idev->mc_list; | |
2464 | if (likely(im != NULL)) { | |
2465 | spin_lock_bh(&im->mca_lock); | |
2466 | psf = im->mca_sources; | |
2467 | if (likely(psf != NULL)) { | |
2468 | state->im = im; | |
2469 | state->idev = idev; | |
2470 | break; | |
2471 | } | |
2472 | spin_unlock_bh(&im->mca_lock); | |
2473 | } | |
2474 | read_unlock_bh(&idev->lock); | |
1da177e4 LT |
2475 | } |
2476 | return psf; | |
2477 | } | |
2478 | ||
2479 | static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf) | |
2480 | { | |
2481 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2482 | ||
2483 | psf = psf->sf_next; | |
2484 | while (!psf) { | |
2485 | spin_unlock_bh(&state->im->mca_lock); | |
2486 | state->im = state->im->next; | |
2487 | while (!state->im) { | |
ce81b76a | 2488 | if (likely(state->idev != NULL)) |
1da177e4 | 2489 | read_unlock_bh(&state->idev->lock); |
ce81b76a ED |
2490 | |
2491 | state->dev = next_net_device_rcu(state->dev); | |
1da177e4 LT |
2492 | if (!state->dev) { |
2493 | state->idev = NULL; | |
2494 | goto out; | |
2495 | } | |
ce81b76a | 2496 | state->idev = __in6_dev_get(state->dev); |
1da177e4 LT |
2497 | if (!state->idev) |
2498 | continue; | |
2499 | read_lock_bh(&state->idev->lock); | |
2500 | state->im = state->idev->mc_list; | |
2501 | } | |
2502 | if (!state->im) | |
2503 | break; | |
2504 | spin_lock_bh(&state->im->mca_lock); | |
2505 | psf = state->im->mca_sources; | |
2506 | } | |
2507 | out: | |
2508 | return psf; | |
2509 | } | |
2510 | ||
2511 | static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos) | |
2512 | { | |
2513 | struct ip6_sf_list *psf = igmp6_mcf_get_first(seq); | |
2514 | if (psf) | |
2515 | while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL) | |
2516 | --pos; | |
2517 | return pos ? NULL : psf; | |
2518 | } | |
2519 | ||
2520 | static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos) | |
ce81b76a | 2521 | __acquires(RCU) |
1da177e4 | 2522 | { |
ce81b76a | 2523 | rcu_read_lock(); |
1da177e4 LT |
2524 | return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; |
2525 | } | |
2526 | ||
2527 | static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2528 | { | |
2529 | struct ip6_sf_list *psf; | |
2530 | if (v == SEQ_START_TOKEN) | |
2531 | psf = igmp6_mcf_get_first(seq); | |
2532 | else | |
2533 | psf = igmp6_mcf_get_next(seq, v); | |
2534 | ++*pos; | |
2535 | return psf; | |
2536 | } | |
2537 | ||
2538 | static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v) | |
ce81b76a | 2539 | __releases(RCU) |
1da177e4 LT |
2540 | { |
2541 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2542 | if (likely(state->im != NULL)) { | |
2543 | spin_unlock_bh(&state->im->mca_lock); | |
2544 | state->im = NULL; | |
2545 | } | |
2546 | if (likely(state->idev != NULL)) { | |
2547 | read_unlock_bh(&state->idev->lock); | |
1da177e4 LT |
2548 | state->idev = NULL; |
2549 | } | |
2550 | state->dev = NULL; | |
ce81b76a | 2551 | rcu_read_unlock(); |
1da177e4 LT |
2552 | } |
2553 | ||
2554 | static int igmp6_mcf_seq_show(struct seq_file *seq, void *v) | |
2555 | { | |
2556 | struct ip6_sf_list *psf = (struct ip6_sf_list *)v; | |
2557 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2558 | ||
2559 | if (v == SEQ_START_TOKEN) { | |
1ab1457c | 2560 | seq_printf(seq, |
1da177e4 | 2561 | "%3s %6s " |
9343e79a | 2562 | "%32s %32s %6s %6s\n", "Idx", |
1da177e4 LT |
2563 | "Device", "Multicast Address", |
2564 | "Source Address", "INC", "EXC"); | |
2565 | } else { | |
2566 | seq_printf(seq, | |
4b7a4274 | 2567 | "%3d %6.6s %pi6 %pi6 %6lu %6lu\n", |
1da177e4 | 2568 | state->dev->ifindex, state->dev->name, |
b071195d HH |
2569 | &state->im->mca_addr, |
2570 | &psf->sf_addr, | |
1da177e4 LT |
2571 | psf->sf_count[MCAST_INCLUDE], |
2572 | psf->sf_count[MCAST_EXCLUDE]); | |
2573 | } | |
2574 | return 0; | |
2575 | } | |
2576 | ||
56b3d975 | 2577 | static const struct seq_operations igmp6_mcf_seq_ops = { |
1da177e4 LT |
2578 | .start = igmp6_mcf_seq_start, |
2579 | .next = igmp6_mcf_seq_next, | |
2580 | .stop = igmp6_mcf_seq_stop, | |
2581 | .show = igmp6_mcf_seq_show, | |
2582 | }; | |
2583 | ||
2584 | static int igmp6_mcf_seq_open(struct inode *inode, struct file *file) | |
2585 | { | |
b8ad0cbc DL |
2586 | return seq_open_net(inode, file, &igmp6_mcf_seq_ops, |
2587 | sizeof(struct igmp6_mcf_iter_state)); | |
1da177e4 LT |
2588 | } |
2589 | ||
9a32144e | 2590 | static const struct file_operations igmp6_mcf_seq_fops = { |
1da177e4 LT |
2591 | .owner = THIS_MODULE, |
2592 | .open = igmp6_mcf_seq_open, | |
2593 | .read = seq_read, | |
2594 | .llseek = seq_lseek, | |
b8ad0cbc | 2595 | .release = seq_release_net, |
1da177e4 | 2596 | }; |
ea82edf7 | 2597 | |
2c8c1e72 | 2598 | static int __net_init igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2599 | { |
2600 | int err; | |
2601 | ||
2602 | err = -ENOMEM; | |
2603 | if (!proc_net_fops_create(net, "igmp6", S_IRUGO, &igmp6_mc_seq_fops)) | |
2604 | goto out; | |
2605 | if (!proc_net_fops_create(net, "mcfilter6", S_IRUGO, | |
2606 | &igmp6_mcf_seq_fops)) | |
2607 | goto out_proc_net_igmp6; | |
2608 | ||
2609 | err = 0; | |
2610 | out: | |
2611 | return err; | |
2612 | ||
2613 | out_proc_net_igmp6: | |
2614 | proc_net_remove(net, "igmp6"); | |
2615 | goto out; | |
2616 | } | |
2617 | ||
2c8c1e72 | 2618 | static void __net_exit igmp6_proc_exit(struct net *net) |
ea82edf7 DL |
2619 | { |
2620 | proc_net_remove(net, "mcfilter6"); | |
2621 | proc_net_remove(net, "igmp6"); | |
2622 | } | |
2623 | #else | |
2c8c1e72 | 2624 | static inline int igmp6_proc_init(struct net *net) |
ea82edf7 DL |
2625 | { |
2626 | return 0; | |
2627 | } | |
2c8c1e72 | 2628 | static inline void igmp6_proc_exit(struct net *net) |
ea82edf7 | 2629 | { |
ea82edf7 | 2630 | } |
1da177e4 LT |
2631 | #endif |
2632 | ||
2c8c1e72 | 2633 | static int __net_init igmp6_net_init(struct net *net) |
1da177e4 | 2634 | { |
1da177e4 LT |
2635 | int err; |
2636 | ||
1ed8516f DL |
2637 | err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6, |
2638 | SOCK_RAW, IPPROTO_ICMPV6, net); | |
1da177e4 LT |
2639 | if (err < 0) { |
2640 | printk(KERN_ERR | |
2641 | "Failed to initialize the IGMP6 control socket (err %d).\n", | |
2642 | err); | |
b8ad0cbc | 2643 | goto out; |
1da177e4 LT |
2644 | } |
2645 | ||
1ed8516f | 2646 | inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1; |
1da177e4 | 2647 | |
ea82edf7 DL |
2648 | err = igmp6_proc_init(net); |
2649 | if (err) | |
b8ad0cbc | 2650 | goto out_sock_create; |
b8ad0cbc DL |
2651 | out: |
2652 | return err; | |
2653 | ||
2654 | out_sock_create: | |
1ed8516f | 2655 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
b8ad0cbc | 2656 | goto out; |
1da177e4 LT |
2657 | } |
2658 | ||
2c8c1e72 | 2659 | static void __net_exit igmp6_net_exit(struct net *net) |
1da177e4 | 2660 | { |
1ed8516f | 2661 | inet_ctl_sock_destroy(net->ipv6.igmp_sk); |
ea82edf7 | 2662 | igmp6_proc_exit(net); |
1da177e4 | 2663 | } |
b8ad0cbc DL |
2664 | |
2665 | static struct pernet_operations igmp6_net_ops = { | |
2666 | .init = igmp6_net_init, | |
2667 | .exit = igmp6_net_exit, | |
2668 | }; | |
2669 | ||
2670 | int __init igmp6_init(void) | |
2671 | { | |
2672 | return register_pernet_subsys(&igmp6_net_ops); | |
2673 | } | |
2674 | ||
2675 | void igmp6_cleanup(void) | |
2676 | { | |
2677 | unregister_pernet_subsys(&igmp6_net_ops); | |
2678 | } |