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 LT |
7 | * |
8 | * $Id: mcast.c,v 1.40 2002/02/08 03:57:19 davem Exp $ | |
9 | * | |
1ab1457c | 10 | * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c |
1da177e4 LT |
11 | * |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License | |
14 | * as published by the Free Software Foundation; either version | |
15 | * 2 of the License, or (at your option) any later version. | |
16 | */ | |
17 | ||
18 | /* Changes: | |
19 | * | |
20 | * yoshfuji : fix format of router-alert option | |
21 | * YOSHIFUJI Hideaki @USAGI: | |
22 | * Fixed source address for MLD message based on | |
23 | * <draft-ietf-magma-mld-source-05.txt>. | |
24 | * YOSHIFUJI Hideaki @USAGI: | |
25 | * - Ignore Queries for invalid addresses. | |
26 | * - MLD for link-local addresses. | |
27 | * David L Stevens <dlstevens@us.ibm.com>: | |
28 | * - MLDv2 support | |
29 | */ | |
30 | ||
1da177e4 LT |
31 | #include <linux/module.h> |
32 | #include <linux/errno.h> | |
33 | #include <linux/types.h> | |
34 | #include <linux/string.h> | |
35 | #include <linux/socket.h> | |
36 | #include <linux/sockios.h> | |
37 | #include <linux/jiffies.h> | |
38 | #include <linux/times.h> | |
39 | #include <linux/net.h> | |
40 | #include <linux/in.h> | |
41 | #include <linux/in6.h> | |
42 | #include <linux/netdevice.h> | |
43 | #include <linux/if_arp.h> | |
44 | #include <linux/route.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/proc_fs.h> | |
47 | #include <linux/seq_file.h> | |
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> | |
62 | ||
63 | #include <net/ip6_checksum.h> | |
64 | ||
65 | /* Set to 3 to get tracing... */ | |
66 | #define MCAST_DEBUG 2 | |
67 | ||
68 | #if MCAST_DEBUG >= 3 | |
69 | #define MDBG(x) printk x | |
70 | #else | |
71 | #define MDBG(x) | |
72 | #endif | |
73 | ||
74 | /* | |
75 | * These header formats should be in a separate include file, but icmpv6.h | |
76 | * doesn't have in6_addr defined in all cases, there is no __u128, and no | |
77 | * other files reference these. | |
78 | * | |
79 | * +-DLS 4/14/03 | |
80 | */ | |
81 | ||
82 | /* Multicast Listener Discovery version 2 headers */ | |
83 | ||
84 | struct mld2_grec { | |
85 | __u8 grec_type; | |
86 | __u8 grec_auxwords; | |
8a74ff77 | 87 | __be16 grec_nsrcs; |
1da177e4 LT |
88 | struct in6_addr grec_mca; |
89 | struct in6_addr grec_src[0]; | |
90 | }; | |
91 | ||
92 | struct mld2_report { | |
93 | __u8 type; | |
94 | __u8 resv1; | |
868c86bc | 95 | __sum16 csum; |
8a74ff77 AV |
96 | __be16 resv2; |
97 | __be16 ngrec; | |
1da177e4 LT |
98 | struct mld2_grec grec[0]; |
99 | }; | |
100 | ||
101 | struct mld2_query { | |
102 | __u8 type; | |
103 | __u8 code; | |
868c86bc | 104 | __sum16 csum; |
8a74ff77 AV |
105 | __be16 mrc; |
106 | __be16 resv1; | |
1da177e4 LT |
107 | struct in6_addr mca; |
108 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
109 | __u8 qrv:3, | |
110 | suppress:1, | |
111 | resv2:4; | |
112 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
113 | __u8 resv2:4, | |
114 | suppress:1, | |
115 | qrv:3; | |
116 | #else | |
117 | #error "Please fix <asm/byteorder.h>" | |
118 | #endif | |
119 | __u8 qqic; | |
8a74ff77 | 120 | __be16 nsrcs; |
1da177e4 LT |
121 | struct in6_addr srcs[0]; |
122 | }; | |
123 | ||
124 | static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT; | |
125 | ||
126 | /* Big mc list lock for all the sockets */ | |
127 | static DEFINE_RWLOCK(ipv6_sk_mc_lock); | |
128 | ||
129 | static struct socket *igmp6_socket; | |
130 | ||
131 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr); | |
132 | ||
133 | static void igmp6_join_group(struct ifmcaddr6 *ma); | |
134 | static void igmp6_leave_group(struct ifmcaddr6 *ma); | |
135 | static void igmp6_timer_handler(unsigned long data); | |
136 | ||
137 | static void mld_gq_timer_expire(unsigned long data); | |
138 | static void mld_ifc_timer_expire(unsigned long data); | |
139 | static void mld_ifc_event(struct inet6_dev *idev); | |
140 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc); | |
141 | static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *addr); | |
142 | static void mld_clear_delrec(struct inet6_dev *idev); | |
143 | static int sf_setstate(struct ifmcaddr6 *pmc); | |
144 | static void sf_markstate(struct ifmcaddr6 *pmc); | |
145 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc); | |
146 | static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
147 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
148 | int delta); | |
149 | static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
150 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
151 | int delta); | |
152 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
153 | struct inet6_dev *idev); | |
154 | ||
155 | ||
156 | #define IGMP6_UNSOLICITED_IVAL (10*HZ) | |
157 | #define MLD_QRV_DEFAULT 2 | |
158 | ||
159 | #define MLD_V1_SEEN(idev) (ipv6_devconf.force_mld_version == 1 || \ | |
160 | (idev)->cnf.force_mld_version == 1 || \ | |
161 | ((idev)->mc_v1_seen && \ | |
162 | time_before(jiffies, (idev)->mc_v1_seen))) | |
163 | ||
164 | #define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value)) | |
165 | #define MLDV2_EXP(thresh, nbmant, nbexp, value) \ | |
166 | ((value) < (thresh) ? (value) : \ | |
f12baeab | 167 | ((MLDV2_MASK(value, nbmant) | (1<<(nbmant))) << \ |
1da177e4 LT |
168 | (MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp)))) |
169 | ||
170 | #define MLDV2_QQIC(value) MLDV2_EXP(0x80, 4, 3, value) | |
171 | #define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value) | |
172 | ||
6f4353d8 | 173 | #define IPV6_MLD_MAX_MSF 64 |
1da177e4 | 174 | |
ab32ea5d | 175 | int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF; |
1da177e4 LT |
176 | |
177 | /* | |
178 | * socket join on multicast group | |
179 | */ | |
180 | ||
181 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, struct in6_addr *addr) | |
182 | { | |
183 | struct net_device *dev = NULL; | |
184 | struct ipv6_mc_socklist *mc_lst; | |
185 | struct ipv6_pinfo *np = inet6_sk(sk); | |
186 | int err; | |
187 | ||
188 | if (!ipv6_addr_is_multicast(addr)) | |
189 | return -EINVAL; | |
190 | ||
c9e3e8b6 DS |
191 | read_lock_bh(&ipv6_sk_mc_lock); |
192 | for (mc_lst=np->ipv6_mc_list; mc_lst; mc_lst=mc_lst->next) { | |
193 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && | |
194 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
195 | read_unlock_bh(&ipv6_sk_mc_lock); | |
196 | return -EADDRINUSE; | |
197 | } | |
198 | } | |
199 | read_unlock_bh(&ipv6_sk_mc_lock); | |
200 | ||
1da177e4 LT |
201 | mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL); |
202 | ||
203 | if (mc_lst == NULL) | |
204 | return -ENOMEM; | |
205 | ||
206 | mc_lst->next = NULL; | |
207 | ipv6_addr_copy(&mc_lst->addr, addr); | |
208 | ||
209 | if (ifindex == 0) { | |
210 | struct rt6_info *rt; | |
211 | rt = rt6_lookup(addr, NULL, 0, 0); | |
212 | if (rt) { | |
213 | dev = rt->rt6i_dev; | |
214 | dev_hold(dev); | |
215 | dst_release(&rt->u.dst); | |
216 | } | |
217 | } else | |
881d966b | 218 | dev = dev_get_by_index(&init_net, ifindex); |
1da177e4 LT |
219 | |
220 | if (dev == NULL) { | |
221 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); | |
222 | return -ENODEV; | |
223 | } | |
224 | ||
225 | mc_lst->ifindex = dev->ifindex; | |
226 | mc_lst->sfmode = MCAST_EXCLUDE; | |
196433c5 | 227 | rwlock_init(&mc_lst->sflock); |
1da177e4 LT |
228 | mc_lst->sflist = NULL; |
229 | ||
230 | /* | |
231 | * now add/increase the group membership on the device | |
232 | */ | |
233 | ||
234 | err = ipv6_dev_mc_inc(dev, addr); | |
235 | ||
236 | if (err) { | |
237 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); | |
238 | dev_put(dev); | |
239 | return err; | |
240 | } | |
241 | ||
242 | write_lock_bh(&ipv6_sk_mc_lock); | |
243 | mc_lst->next = np->ipv6_mc_list; | |
244 | np->ipv6_mc_list = mc_lst; | |
245 | write_unlock_bh(&ipv6_sk_mc_lock); | |
246 | ||
247 | dev_put(dev); | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
252 | /* | |
253 | * socket leave on multicast group | |
254 | */ | |
255 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, struct in6_addr *addr) | |
256 | { | |
257 | struct ipv6_pinfo *np = inet6_sk(sk); | |
258 | struct ipv6_mc_socklist *mc_lst, **lnk; | |
259 | ||
260 | write_lock_bh(&ipv6_sk_mc_lock); | |
261 | for (lnk = &np->ipv6_mc_list; (mc_lst = *lnk) !=NULL ; lnk = &mc_lst->next) { | |
262 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && | |
263 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
264 | struct net_device *dev; | |
265 | ||
266 | *lnk = mc_lst->next; | |
267 | write_unlock_bh(&ipv6_sk_mc_lock); | |
268 | ||
881d966b | 269 | if ((dev = dev_get_by_index(&init_net, mc_lst->ifindex)) != NULL) { |
1da177e4 LT |
270 | struct inet6_dev *idev = in6_dev_get(dev); |
271 | ||
acd6e00b | 272 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
1da177e4 | 273 | if (idev) { |
1da177e4 LT |
274 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
275 | in6_dev_put(idev); | |
276 | } | |
277 | dev_put(dev); | |
acd6e00b DS |
278 | } else |
279 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
1da177e4 LT |
280 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
281 | return 0; | |
282 | } | |
283 | } | |
284 | write_unlock_bh(&ipv6_sk_mc_lock); | |
285 | ||
9951f036 | 286 | return -EADDRNOTAVAIL; |
1da177e4 LT |
287 | } |
288 | ||
289 | static struct inet6_dev *ip6_mc_find_dev(struct in6_addr *group, int ifindex) | |
290 | { | |
291 | struct net_device *dev = NULL; | |
292 | struct inet6_dev *idev = NULL; | |
293 | ||
294 | if (ifindex == 0) { | |
295 | struct rt6_info *rt; | |
296 | ||
297 | rt = rt6_lookup(group, NULL, 0, 0); | |
298 | if (rt) { | |
299 | dev = rt->rt6i_dev; | |
300 | dev_hold(dev); | |
301 | dst_release(&rt->u.dst); | |
302 | } | |
303 | } else | |
881d966b | 304 | dev = dev_get_by_index(&init_net, ifindex); |
1da177e4 LT |
305 | |
306 | if (!dev) | |
307 | return NULL; | |
308 | idev = in6_dev_get(dev); | |
309 | if (!idev) { | |
310 | dev_put(dev); | |
311 | return NULL; | |
312 | } | |
313 | read_lock_bh(&idev->lock); | |
314 | if (idev->dead) { | |
315 | read_unlock_bh(&idev->lock); | |
316 | in6_dev_put(idev); | |
317 | dev_put(dev); | |
318 | return NULL; | |
319 | } | |
320 | return idev; | |
321 | } | |
322 | ||
323 | void ipv6_sock_mc_close(struct sock *sk) | |
324 | { | |
325 | struct ipv6_pinfo *np = inet6_sk(sk); | |
326 | struct ipv6_mc_socklist *mc_lst; | |
327 | ||
328 | write_lock_bh(&ipv6_sk_mc_lock); | |
329 | while ((mc_lst = np->ipv6_mc_list) != NULL) { | |
330 | struct net_device *dev; | |
331 | ||
332 | np->ipv6_mc_list = mc_lst->next; | |
333 | write_unlock_bh(&ipv6_sk_mc_lock); | |
334 | ||
881d966b | 335 | dev = dev_get_by_index(&init_net, mc_lst->ifindex); |
1da177e4 LT |
336 | if (dev) { |
337 | struct inet6_dev *idev = in6_dev_get(dev); | |
338 | ||
acd6e00b | 339 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
1da177e4 | 340 | if (idev) { |
1da177e4 LT |
341 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
342 | in6_dev_put(idev); | |
343 | } | |
344 | dev_put(dev); | |
acd6e00b DS |
345 | } else |
346 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
1da177e4 LT |
347 | |
348 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); | |
349 | ||
350 | write_lock_bh(&ipv6_sk_mc_lock); | |
351 | } | |
352 | write_unlock_bh(&ipv6_sk_mc_lock); | |
353 | } | |
354 | ||
355 | int ip6_mc_source(int add, int omode, struct sock *sk, | |
356 | struct group_source_req *pgsr) | |
357 | { | |
358 | struct in6_addr *source, *group; | |
359 | struct ipv6_mc_socklist *pmc; | |
360 | struct net_device *dev; | |
361 | struct inet6_dev *idev; | |
362 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
363 | struct ip6_sf_socklist *psl; | |
364 | int i, j, rv; | |
c9e3e8b6 | 365 | int leavegroup = 0; |
5ab4a6c8 | 366 | int pmclocked = 0; |
1da177e4 LT |
367 | int err; |
368 | ||
369 | if (pgsr->gsr_group.ss_family != AF_INET6 || | |
370 | pgsr->gsr_source.ss_family != AF_INET6) | |
371 | return -EINVAL; | |
372 | ||
373 | source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr; | |
374 | group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr; | |
375 | ||
376 | if (!ipv6_addr_is_multicast(group)) | |
377 | return -EINVAL; | |
378 | ||
379 | idev = ip6_mc_find_dev(group, pgsr->gsr_interface); | |
380 | if (!idev) | |
381 | return -ENODEV; | |
382 | dev = idev->dev; | |
383 | ||
384 | err = -EADDRNOTAVAIL; | |
385 | ||
c9e3e8b6 | 386 | read_lock_bh(&ipv6_sk_mc_lock); |
1da177e4 LT |
387 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { |
388 | if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface) | |
389 | continue; | |
390 | if (ipv6_addr_equal(&pmc->addr, group)) | |
391 | break; | |
392 | } | |
917f2f10 DS |
393 | if (!pmc) { /* must have a prior join */ |
394 | err = -EINVAL; | |
1da177e4 | 395 | goto done; |
917f2f10 | 396 | } |
1da177e4 LT |
397 | /* if a source filter was set, must be the same mode as before */ |
398 | if (pmc->sflist) { | |
917f2f10 DS |
399 | if (pmc->sfmode != omode) { |
400 | err = -EINVAL; | |
1da177e4 | 401 | goto done; |
917f2f10 | 402 | } |
1da177e4 LT |
403 | } else if (pmc->sfmode != omode) { |
404 | /* allow mode switches for empty-set filters */ | |
405 | ip6_mc_add_src(idev, group, omode, 0, NULL, 0); | |
406 | ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
407 | pmc->sfmode = omode; | |
408 | } | |
409 | ||
5ab4a6c8 DS |
410 | write_lock_bh(&pmc->sflock); |
411 | pmclocked = 1; | |
412 | ||
1da177e4 LT |
413 | psl = pmc->sflist; |
414 | if (!add) { | |
415 | if (!psl) | |
917f2f10 | 416 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 LT |
417 | rv = !0; |
418 | for (i=0; i<psl->sl_count; i++) { | |
419 | rv = memcmp(&psl->sl_addr[i], source, | |
420 | sizeof(struct in6_addr)); | |
421 | if (rv == 0) | |
422 | break; | |
423 | } | |
424 | if (rv) /* source not found */ | |
917f2f10 | 425 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 426 | |
c9e3e8b6 DS |
427 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
428 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { | |
429 | leavegroup = 1; | |
430 | goto done; | |
431 | } | |
432 | ||
1da177e4 LT |
433 | /* update the interface filter */ |
434 | ip6_mc_del_src(idev, group, omode, 1, source, 1); | |
435 | ||
436 | for (j=i+1; j<psl->sl_count; j++) | |
437 | psl->sl_addr[j-1] = psl->sl_addr[j]; | |
438 | psl->sl_count--; | |
439 | err = 0; | |
440 | goto done; | |
441 | } | |
442 | /* else, add a new source to the filter */ | |
443 | ||
444 | if (psl && psl->sl_count >= sysctl_mld_max_msf) { | |
445 | err = -ENOBUFS; | |
446 | goto done; | |
447 | } | |
448 | if (!psl || psl->sl_count == psl->sl_max) { | |
449 | struct ip6_sf_socklist *newpsl; | |
450 | int count = IP6_SFBLOCK; | |
451 | ||
452 | if (psl) | |
453 | count += psl->sl_max; | |
8b3a7005 | 454 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC); |
1da177e4 LT |
455 | if (!newpsl) { |
456 | err = -ENOBUFS; | |
457 | goto done; | |
458 | } | |
459 | newpsl->sl_max = count; | |
460 | newpsl->sl_count = count - IP6_SFBLOCK; | |
461 | if (psl) { | |
462 | for (i=0; i<psl->sl_count; i++) | |
463 | newpsl->sl_addr[i] = psl->sl_addr[i]; | |
464 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
465 | } | |
466 | pmc->sflist = psl = newpsl; | |
467 | } | |
468 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ | |
469 | for (i=0; i<psl->sl_count; i++) { | |
470 | rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr)); | |
471 | if (rv == 0) | |
472 | break; | |
473 | } | |
474 | if (rv == 0) /* address already there is an error */ | |
475 | goto done; | |
476 | for (j=psl->sl_count-1; j>=i; j--) | |
477 | psl->sl_addr[j+1] = psl->sl_addr[j]; | |
478 | psl->sl_addr[i] = *source; | |
479 | psl->sl_count++; | |
480 | err = 0; | |
481 | /* update the interface list */ | |
482 | ip6_mc_add_src(idev, group, omode, 1, source, 1); | |
483 | done: | |
5ab4a6c8 DS |
484 | if (pmclocked) |
485 | write_unlock_bh(&pmc->sflock); | |
c9e3e8b6 | 486 | read_unlock_bh(&ipv6_sk_mc_lock); |
1da177e4 LT |
487 | read_unlock_bh(&idev->lock); |
488 | in6_dev_put(idev); | |
489 | dev_put(dev); | |
c9e3e8b6 DS |
490 | if (leavegroup) |
491 | return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group); | |
1da177e4 LT |
492 | return err; |
493 | } | |
494 | ||
495 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) | |
496 | { | |
497 | struct in6_addr *group; | |
498 | struct ipv6_mc_socklist *pmc; | |
499 | struct net_device *dev; | |
500 | struct inet6_dev *idev; | |
501 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
502 | struct ip6_sf_socklist *newpsl, *psl; | |
9951f036 | 503 | int leavegroup = 0; |
1da177e4 LT |
504 | int i, err; |
505 | ||
506 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
507 | ||
508 | if (!ipv6_addr_is_multicast(group)) | |
509 | return -EINVAL; | |
510 | if (gsf->gf_fmode != MCAST_INCLUDE && | |
511 | gsf->gf_fmode != MCAST_EXCLUDE) | |
512 | return -EINVAL; | |
513 | ||
514 | idev = ip6_mc_find_dev(group, gsf->gf_interface); | |
515 | ||
516 | if (!idev) | |
517 | return -ENODEV; | |
518 | dev = idev->dev; | |
1da177e4 | 519 | |
9c05989b | 520 | err = 0; |
5ab4a6c8 DS |
521 | read_lock_bh(&ipv6_sk_mc_lock); |
522 | ||
9951f036 DS |
523 | if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) { |
524 | leavegroup = 1; | |
525 | goto done; | |
526 | } | |
527 | ||
1da177e4 LT |
528 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { |
529 | if (pmc->ifindex != gsf->gf_interface) | |
530 | continue; | |
531 | if (ipv6_addr_equal(&pmc->addr, group)) | |
532 | break; | |
533 | } | |
917f2f10 DS |
534 | if (!pmc) { /* must have a prior join */ |
535 | err = -EINVAL; | |
1da177e4 | 536 | goto done; |
917f2f10 | 537 | } |
1da177e4 | 538 | if (gsf->gf_numsrc) { |
8b3a7005 KK |
539 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc), |
540 | GFP_ATOMIC); | |
1da177e4 LT |
541 | if (!newpsl) { |
542 | err = -ENOBUFS; | |
543 | goto done; | |
544 | } | |
545 | newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc; | |
546 | for (i=0; i<newpsl->sl_count; ++i) { | |
547 | struct sockaddr_in6 *psin6; | |
548 | ||
549 | psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i]; | |
550 | newpsl->sl_addr[i] = psin6->sin6_addr; | |
551 | } | |
552 | err = ip6_mc_add_src(idev, group, gsf->gf_fmode, | |
553 | newpsl->sl_count, newpsl->sl_addr, 0); | |
554 | if (err) { | |
555 | sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); | |
556 | goto done; | |
557 | } | |
8713dbf0 | 558 | } else { |
1da177e4 | 559 | newpsl = NULL; |
8713dbf0 YZ |
560 | (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); |
561 | } | |
5ab4a6c8 DS |
562 | |
563 | write_lock_bh(&pmc->sflock); | |
1da177e4 LT |
564 | psl = pmc->sflist; |
565 | if (psl) { | |
566 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, | |
567 | psl->sl_count, psl->sl_addr, 0); | |
568 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
569 | } else | |
570 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
571 | pmc->sflist = newpsl; | |
572 | pmc->sfmode = gsf->gf_fmode; | |
5ab4a6c8 | 573 | write_unlock_bh(&pmc->sflock); |
917f2f10 | 574 | err = 0; |
1da177e4 | 575 | done: |
5ab4a6c8 | 576 | read_unlock_bh(&ipv6_sk_mc_lock); |
1da177e4 LT |
577 | read_unlock_bh(&idev->lock); |
578 | in6_dev_put(idev); | |
579 | dev_put(dev); | |
9951f036 DS |
580 | if (leavegroup) |
581 | err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group); | |
1da177e4 LT |
582 | return err; |
583 | } | |
584 | ||
585 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
586 | struct group_filter __user *optval, int __user *optlen) | |
587 | { | |
588 | int err, i, count, copycount; | |
589 | struct in6_addr *group; | |
590 | struct ipv6_mc_socklist *pmc; | |
591 | struct inet6_dev *idev; | |
592 | struct net_device *dev; | |
593 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
594 | struct ip6_sf_socklist *psl; | |
595 | ||
596 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
597 | ||
598 | if (!ipv6_addr_is_multicast(group)) | |
599 | return -EINVAL; | |
600 | ||
601 | idev = ip6_mc_find_dev(group, gsf->gf_interface); | |
602 | ||
603 | if (!idev) | |
604 | return -ENODEV; | |
605 | ||
606 | dev = idev->dev; | |
607 | ||
608 | err = -EADDRNOTAVAIL; | |
5ab4a6c8 DS |
609 | /* |
610 | * changes to the ipv6_mc_list require the socket lock and | |
611 | * a read lock on ip6_sk_mc_lock. We have the socket lock, | |
612 | * so reading the list is safe. | |
613 | */ | |
1da177e4 LT |
614 | |
615 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { | |
616 | if (pmc->ifindex != gsf->gf_interface) | |
617 | continue; | |
618 | if (ipv6_addr_equal(group, &pmc->addr)) | |
619 | break; | |
620 | } | |
621 | if (!pmc) /* must have a prior join */ | |
622 | goto done; | |
623 | gsf->gf_fmode = pmc->sfmode; | |
624 | psl = pmc->sflist; | |
625 | count = psl ? psl->sl_count : 0; | |
626 | read_unlock_bh(&idev->lock); | |
627 | in6_dev_put(idev); | |
628 | dev_put(dev); | |
629 | ||
630 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; | |
631 | gsf->gf_numsrc = count; | |
632 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || | |
633 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { | |
634 | return -EFAULT; | |
635 | } | |
5ab4a6c8 DS |
636 | /* changes to psl require the socket lock, a read lock on |
637 | * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We | |
638 | * have the socket lock, so reading here is safe. | |
639 | */ | |
1da177e4 LT |
640 | for (i=0; i<copycount; i++) { |
641 | struct sockaddr_in6 *psin6; | |
642 | struct sockaddr_storage ss; | |
643 | ||
644 | psin6 = (struct sockaddr_in6 *)&ss; | |
645 | memset(&ss, 0, sizeof(ss)); | |
646 | psin6->sin6_family = AF_INET6; | |
647 | psin6->sin6_addr = psl->sl_addr[i]; | |
1ab1457c | 648 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) |
1da177e4 LT |
649 | return -EFAULT; |
650 | } | |
651 | return 0; | |
652 | done: | |
653 | read_unlock_bh(&idev->lock); | |
654 | in6_dev_put(idev); | |
655 | dev_put(dev); | |
656 | return err; | |
657 | } | |
658 | ||
659 | int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr, | |
660 | struct in6_addr *src_addr) | |
661 | { | |
662 | struct ipv6_pinfo *np = inet6_sk(sk); | |
663 | struct ipv6_mc_socklist *mc; | |
664 | struct ip6_sf_socklist *psl; | |
665 | int rv = 1; | |
666 | ||
667 | read_lock(&ipv6_sk_mc_lock); | |
668 | for (mc = np->ipv6_mc_list; mc; mc = mc->next) { | |
669 | if (ipv6_addr_equal(&mc->addr, mc_addr)) | |
670 | break; | |
671 | } | |
672 | if (!mc) { | |
673 | read_unlock(&ipv6_sk_mc_lock); | |
674 | return 1; | |
675 | } | |
5ab4a6c8 | 676 | read_lock(&mc->sflock); |
1da177e4 LT |
677 | psl = mc->sflist; |
678 | if (!psl) { | |
679 | rv = mc->sfmode == MCAST_EXCLUDE; | |
680 | } else { | |
681 | int i; | |
682 | ||
683 | for (i=0; i<psl->sl_count; i++) { | |
684 | if (ipv6_addr_equal(&psl->sl_addr[i], src_addr)) | |
685 | break; | |
686 | } | |
687 | if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) | |
688 | rv = 0; | |
689 | if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) | |
690 | rv = 0; | |
691 | } | |
5ab4a6c8 | 692 | read_unlock(&mc->sflock); |
1da177e4 LT |
693 | read_unlock(&ipv6_sk_mc_lock); |
694 | ||
695 | return rv; | |
696 | } | |
697 | ||
698 | static void ma_put(struct ifmcaddr6 *mc) | |
699 | { | |
700 | if (atomic_dec_and_test(&mc->mca_refcnt)) { | |
701 | in6_dev_put(mc->idev); | |
702 | kfree(mc); | |
703 | } | |
704 | } | |
705 | ||
706 | static void igmp6_group_added(struct ifmcaddr6 *mc) | |
707 | { | |
708 | struct net_device *dev = mc->idev->dev; | |
709 | char buf[MAX_ADDR_LEN]; | |
710 | ||
711 | spin_lock_bh(&mc->mca_lock); | |
712 | if (!(mc->mca_flags&MAF_LOADED)) { | |
713 | mc->mca_flags |= MAF_LOADED; | |
714 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
715 | dev_mc_add(dev, buf, dev->addr_len, 0); | |
716 | } | |
717 | spin_unlock_bh(&mc->mca_lock); | |
718 | ||
719 | if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT)) | |
720 | return; | |
721 | ||
722 | if (MLD_V1_SEEN(mc->idev)) { | |
723 | igmp6_join_group(mc); | |
724 | return; | |
725 | } | |
726 | /* else v2 */ | |
727 | ||
728 | mc->mca_crcount = mc->idev->mc_qrv; | |
729 | mld_ifc_event(mc->idev); | |
730 | } | |
731 | ||
732 | static void igmp6_group_dropped(struct ifmcaddr6 *mc) | |
733 | { | |
734 | struct net_device *dev = mc->idev->dev; | |
735 | char buf[MAX_ADDR_LEN]; | |
736 | ||
737 | spin_lock_bh(&mc->mca_lock); | |
738 | if (mc->mca_flags&MAF_LOADED) { | |
739 | mc->mca_flags &= ~MAF_LOADED; | |
740 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
741 | dev_mc_delete(dev, buf, dev->addr_len, 0); | |
742 | } | |
743 | ||
744 | if (mc->mca_flags & MAF_NOREPORT) | |
745 | goto done; | |
746 | spin_unlock_bh(&mc->mca_lock); | |
747 | ||
748 | if (!mc->idev->dead) | |
749 | igmp6_leave_group(mc); | |
750 | ||
751 | spin_lock_bh(&mc->mca_lock); | |
752 | if (del_timer(&mc->mca_timer)) | |
753 | atomic_dec(&mc->mca_refcnt); | |
754 | done: | |
755 | ip6_mc_clear_src(mc); | |
756 | spin_unlock_bh(&mc->mca_lock); | |
757 | } | |
758 | ||
759 | /* | |
760 | * deleted ifmcaddr6 manipulation | |
761 | */ | |
762 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) | |
763 | { | |
764 | struct ifmcaddr6 *pmc; | |
765 | ||
766 | /* this is an "ifmcaddr6" for convenience; only the fields below | |
767 | * are actually used. In particular, the refcnt and users are not | |
768 | * used for management of the delete list. Using the same structure | |
769 | * for deleted items allows change reports to use common code with | |
770 | * non-deleted or query-response MCA's. | |
771 | */ | |
0c600eda | 772 | pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC); |
1da177e4 LT |
773 | if (!pmc) |
774 | return; | |
0c600eda | 775 | |
1da177e4 LT |
776 | spin_lock_bh(&im->mca_lock); |
777 | spin_lock_init(&pmc->mca_lock); | |
778 | pmc->idev = im->idev; | |
779 | in6_dev_hold(idev); | |
780 | pmc->mca_addr = im->mca_addr; | |
781 | pmc->mca_crcount = idev->mc_qrv; | |
782 | pmc->mca_sfmode = im->mca_sfmode; | |
783 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
784 | struct ip6_sf_list *psf; | |
785 | ||
786 | pmc->mca_tomb = im->mca_tomb; | |
787 | pmc->mca_sources = im->mca_sources; | |
788 | im->mca_tomb = im->mca_sources = NULL; | |
789 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) | |
790 | psf->sf_crcount = pmc->mca_crcount; | |
791 | } | |
792 | spin_unlock_bh(&im->mca_lock); | |
793 | ||
794 | write_lock_bh(&idev->mc_lock); | |
795 | pmc->next = idev->mc_tomb; | |
796 | idev->mc_tomb = pmc; | |
797 | write_unlock_bh(&idev->mc_lock); | |
798 | } | |
799 | ||
800 | static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca) | |
801 | { | |
802 | struct ifmcaddr6 *pmc, *pmc_prev; | |
803 | struct ip6_sf_list *psf, *psf_next; | |
804 | ||
805 | write_lock_bh(&idev->mc_lock); | |
806 | pmc_prev = NULL; | |
807 | for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) { | |
808 | if (ipv6_addr_equal(&pmc->mca_addr, pmca)) | |
809 | break; | |
810 | pmc_prev = pmc; | |
811 | } | |
812 | if (pmc) { | |
813 | if (pmc_prev) | |
814 | pmc_prev->next = pmc->next; | |
815 | else | |
816 | idev->mc_tomb = pmc->next; | |
817 | } | |
818 | write_unlock_bh(&idev->mc_lock); | |
819 | if (pmc) { | |
820 | for (psf=pmc->mca_tomb; psf; psf=psf_next) { | |
821 | psf_next = psf->sf_next; | |
822 | kfree(psf); | |
823 | } | |
824 | in6_dev_put(pmc->idev); | |
825 | kfree(pmc); | |
826 | } | |
827 | } | |
828 | ||
829 | static void mld_clear_delrec(struct inet6_dev *idev) | |
830 | { | |
831 | struct ifmcaddr6 *pmc, *nextpmc; | |
832 | ||
833 | write_lock_bh(&idev->mc_lock); | |
834 | pmc = idev->mc_tomb; | |
835 | idev->mc_tomb = NULL; | |
836 | write_unlock_bh(&idev->mc_lock); | |
837 | ||
838 | for (; pmc; pmc = nextpmc) { | |
839 | nextpmc = pmc->next; | |
840 | ip6_mc_clear_src(pmc); | |
841 | in6_dev_put(pmc->idev); | |
842 | kfree(pmc); | |
843 | } | |
844 | ||
845 | /* clear dead sources, too */ | |
846 | read_lock_bh(&idev->lock); | |
847 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
848 | struct ip6_sf_list *psf, *psf_next; | |
849 | ||
850 | spin_lock_bh(&pmc->mca_lock); | |
851 | psf = pmc->mca_tomb; | |
852 | pmc->mca_tomb = NULL; | |
853 | spin_unlock_bh(&pmc->mca_lock); | |
854 | for (; psf; psf=psf_next) { | |
855 | psf_next = psf->sf_next; | |
856 | kfree(psf); | |
857 | } | |
858 | } | |
859 | read_unlock_bh(&idev->lock); | |
860 | } | |
861 | ||
862 | ||
863 | /* | |
864 | * device multicast group inc (add if not found) | |
865 | */ | |
866 | int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr) | |
867 | { | |
868 | struct ifmcaddr6 *mc; | |
869 | struct inet6_dev *idev; | |
870 | ||
871 | idev = in6_dev_get(dev); | |
872 | ||
873 | if (idev == NULL) | |
874 | return -EINVAL; | |
875 | ||
876 | write_lock_bh(&idev->lock); | |
877 | if (idev->dead) { | |
878 | write_unlock_bh(&idev->lock); | |
879 | in6_dev_put(idev); | |
880 | return -ENODEV; | |
881 | } | |
882 | ||
883 | for (mc = idev->mc_list; mc; mc = mc->next) { | |
884 | if (ipv6_addr_equal(&mc->mca_addr, addr)) { | |
885 | mc->mca_users++; | |
886 | write_unlock_bh(&idev->lock); | |
887 | ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0, | |
888 | NULL, 0); | |
889 | in6_dev_put(idev); | |
890 | return 0; | |
891 | } | |
892 | } | |
893 | ||
894 | /* | |
895 | * not found: create a new one. | |
896 | */ | |
897 | ||
0c600eda | 898 | mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC); |
1da177e4 LT |
899 | |
900 | if (mc == NULL) { | |
901 | write_unlock_bh(&idev->lock); | |
902 | in6_dev_put(idev); | |
903 | return -ENOMEM; | |
904 | } | |
905 | ||
b24b8a24 | 906 | setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc); |
1da177e4 LT |
907 | |
908 | ipv6_addr_copy(&mc->mca_addr, addr); | |
909 | mc->idev = idev; | |
910 | mc->mca_users = 1; | |
911 | /* mca_stamp should be updated upon changes */ | |
912 | mc->mca_cstamp = mc->mca_tstamp = jiffies; | |
913 | atomic_set(&mc->mca_refcnt, 2); | |
914 | spin_lock_init(&mc->mca_lock); | |
915 | ||
916 | /* initial mode is (EX, empty) */ | |
917 | mc->mca_sfmode = MCAST_EXCLUDE; | |
918 | mc->mca_sfcount[MCAST_EXCLUDE] = 1; | |
919 | ||
920 | if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) || | |
921 | IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
922 | mc->mca_flags |= MAF_NOREPORT; | |
923 | ||
924 | mc->next = idev->mc_list; | |
925 | idev->mc_list = mc; | |
926 | write_unlock_bh(&idev->lock); | |
927 | ||
928 | mld_del_delrec(idev, &mc->mca_addr); | |
929 | igmp6_group_added(mc); | |
930 | ma_put(mc); | |
931 | return 0; | |
932 | } | |
933 | ||
934 | /* | |
935 | * device multicast group del | |
936 | */ | |
937 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr) | |
938 | { | |
939 | struct ifmcaddr6 *ma, **map; | |
940 | ||
941 | write_lock_bh(&idev->lock); | |
942 | for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) { | |
943 | if (ipv6_addr_equal(&ma->mca_addr, addr)) { | |
944 | if (--ma->mca_users == 0) { | |
945 | *map = ma->next; | |
946 | write_unlock_bh(&idev->lock); | |
947 | ||
948 | igmp6_group_dropped(ma); | |
949 | ||
950 | ma_put(ma); | |
951 | return 0; | |
952 | } | |
953 | write_unlock_bh(&idev->lock); | |
954 | return 0; | |
955 | } | |
956 | } | |
957 | write_unlock_bh(&idev->lock); | |
958 | ||
959 | return -ENOENT; | |
960 | } | |
961 | ||
962 | int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr) | |
963 | { | |
964 | struct inet6_dev *idev = in6_dev_get(dev); | |
965 | int err; | |
966 | ||
967 | if (!idev) | |
968 | return -ENODEV; | |
969 | ||
970 | err = __ipv6_dev_mc_dec(idev, addr); | |
971 | ||
972 | in6_dev_put(idev); | |
973 | ||
974 | return err; | |
975 | } | |
976 | ||
977 | /* | |
978 | * identify MLD packets for MLD filter exceptions | |
979 | */ | |
980 | int ipv6_is_mld(struct sk_buff *skb, int nexthdr) | |
981 | { | |
982 | struct icmp6hdr *pic; | |
983 | ||
984 | if (nexthdr != IPPROTO_ICMPV6) | |
985 | return 0; | |
986 | ||
987 | if (!pskb_may_pull(skb, sizeof(struct icmp6hdr))) | |
988 | return 0; | |
989 | ||
cc70ab26 | 990 | pic = icmp6_hdr(skb); |
1da177e4 LT |
991 | |
992 | switch (pic->icmp6_type) { | |
993 | case ICMPV6_MGM_QUERY: | |
994 | case ICMPV6_MGM_REPORT: | |
995 | case ICMPV6_MGM_REDUCTION: | |
996 | case ICMPV6_MLD2_REPORT: | |
997 | return 1; | |
998 | default: | |
999 | break; | |
1000 | } | |
1001 | return 0; | |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | * check if the interface/address pair is valid | |
1006 | */ | |
1007 | int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group, | |
1008 | struct in6_addr *src_addr) | |
1009 | { | |
1010 | struct inet6_dev *idev; | |
1011 | struct ifmcaddr6 *mc; | |
1012 | int rv = 0; | |
1013 | ||
1014 | idev = in6_dev_get(dev); | |
1015 | if (idev) { | |
1016 | read_lock_bh(&idev->lock); | |
1017 | for (mc = idev->mc_list; mc; mc=mc->next) { | |
1018 | if (ipv6_addr_equal(&mc->mca_addr, group)) | |
1019 | break; | |
1020 | } | |
1021 | if (mc) { | |
1022 | if (src_addr && !ipv6_addr_any(src_addr)) { | |
1023 | struct ip6_sf_list *psf; | |
1024 | ||
1025 | spin_lock_bh(&mc->mca_lock); | |
1026 | for (psf=mc->mca_sources;psf;psf=psf->sf_next) { | |
1027 | if (ipv6_addr_equal(&psf->sf_addr, src_addr)) | |
1028 | break; | |
1029 | } | |
1030 | if (psf) | |
1031 | rv = psf->sf_count[MCAST_INCLUDE] || | |
1032 | psf->sf_count[MCAST_EXCLUDE] != | |
1033 | mc->mca_sfcount[MCAST_EXCLUDE]; | |
1034 | else | |
1035 | rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0; | |
1036 | spin_unlock_bh(&mc->mca_lock); | |
1037 | } else | |
1038 | rv = 1; /* don't filter unspecified source */ | |
1039 | } | |
1040 | read_unlock_bh(&idev->lock); | |
1041 | in6_dev_put(idev); | |
1042 | } | |
1043 | return rv; | |
1044 | } | |
1045 | ||
1046 | static void mld_gq_start_timer(struct inet6_dev *idev) | |
1047 | { | |
1048 | int tv = net_random() % idev->mc_maxdelay; | |
1049 | ||
1050 | idev->mc_gq_running = 1; | |
1051 | if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2)) | |
1052 | in6_dev_hold(idev); | |
1053 | } | |
1054 | ||
1055 | static void mld_ifc_start_timer(struct inet6_dev *idev, int delay) | |
1056 | { | |
1057 | int tv = net_random() % delay; | |
1058 | ||
1059 | if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2)) | |
1060 | in6_dev_hold(idev); | |
1061 | } | |
1062 | ||
1063 | /* | |
1064 | * IGMP handling (alias multicast ICMPv6 messages) | |
1065 | */ | |
1066 | ||
1067 | static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) | |
1068 | { | |
1069 | unsigned long delay = resptime; | |
1070 | ||
1071 | /* Do not start timer for these addresses */ | |
1072 | if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) || | |
1073 | IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
1074 | return; | |
1075 | ||
1076 | if (del_timer(&ma->mca_timer)) { | |
1077 | atomic_dec(&ma->mca_refcnt); | |
1078 | delay = ma->mca_timer.expires - jiffies; | |
1079 | } | |
1080 | ||
1081 | if (delay >= resptime) { | |
1082 | if (resptime) | |
1083 | delay = net_random() % resptime; | |
1084 | else | |
1085 | delay = 1; | |
1086 | } | |
1087 | ma->mca_timer.expires = jiffies + delay; | |
1088 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
1089 | atomic_inc(&ma->mca_refcnt); | |
1090 | ma->mca_flags |= MAF_TIMER_RUNNING; | |
1091 | } | |
1092 | ||
5ab4a6c8 DS |
1093 | /* mark EXCLUDE-mode sources */ |
1094 | static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs, | |
1da177e4 LT |
1095 | struct in6_addr *srcs) |
1096 | { | |
1097 | struct ip6_sf_list *psf; | |
1098 | int i, scount; | |
1099 | ||
1100 | scount = 0; | |
1101 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1102 | if (scount == nsrcs) | |
1103 | break; | |
5ab4a6c8 DS |
1104 | for (i=0; i<nsrcs; i++) { |
1105 | /* skip inactive filters */ | |
1106 | if (pmc->mca_sfcount[MCAST_INCLUDE] || | |
1107 | pmc->mca_sfcount[MCAST_EXCLUDE] != | |
1108 | psf->sf_count[MCAST_EXCLUDE]) | |
1109 | continue; | |
1110 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { | |
1111 | scount++; | |
1112 | break; | |
1113 | } | |
1114 | } | |
1115 | } | |
1116 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1117 | if (scount == nsrcs) /* all sources excluded */ | |
1118 | return 0; | |
1119 | return 1; | |
1120 | } | |
1121 | ||
1122 | static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs, | |
1123 | struct in6_addr *srcs) | |
1124 | { | |
1125 | struct ip6_sf_list *psf; | |
1126 | int i, scount; | |
1127 | ||
1128 | if (pmc->mca_sfmode == MCAST_EXCLUDE) | |
1129 | return mld_xmarksources(pmc, nsrcs, srcs); | |
1130 | ||
1131 | /* mark INCLUDE-mode sources */ | |
1132 | ||
1133 | scount = 0; | |
1134 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1135 | if (scount == nsrcs) | |
1136 | break; | |
1137 | for (i=0; i<nsrcs; i++) { | |
1da177e4 LT |
1138 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1139 | psf->sf_gsresp = 1; | |
1140 | scount++; | |
1141 | break; | |
1142 | } | |
5ab4a6c8 DS |
1143 | } |
1144 | } | |
1145 | if (!scount) { | |
1146 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1147 | return 0; | |
1da177e4 | 1148 | } |
5ab4a6c8 DS |
1149 | pmc->mca_flags |= MAF_GSQUERY; |
1150 | return 1; | |
1da177e4 LT |
1151 | } |
1152 | ||
1153 | int igmp6_event_query(struct sk_buff *skb) | |
1154 | { | |
97300b5f | 1155 | struct mld2_query *mlh2 = NULL; |
1da177e4 LT |
1156 | struct ifmcaddr6 *ma; |
1157 | struct in6_addr *group; | |
1158 | unsigned long max_delay; | |
1159 | struct inet6_dev *idev; | |
1160 | struct icmp6hdr *hdr; | |
1161 | int group_type; | |
1162 | int mark = 0; | |
1163 | int len; | |
1164 | ||
1165 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) | |
1166 | return -EINVAL; | |
1167 | ||
1168 | /* compute payload length excluding extension headers */ | |
0660e03f | 1169 | len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); |
cfe1fc77 | 1170 | len -= skb_network_header_len(skb); |
1da177e4 LT |
1171 | |
1172 | /* Drop queries with not link local source */ | |
0660e03f | 1173 | if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) |
1da177e4 LT |
1174 | return -EINVAL; |
1175 | ||
1176 | idev = in6_dev_get(skb->dev); | |
1177 | ||
1178 | if (idev == NULL) | |
1179 | return 0; | |
1180 | ||
cc70ab26 | 1181 | hdr = icmp6_hdr(skb); |
1da177e4 LT |
1182 | group = (struct in6_addr *) (hdr + 1); |
1183 | group_type = ipv6_addr_type(group); | |
1184 | ||
1185 | if (group_type != IPV6_ADDR_ANY && | |
1186 | !(group_type&IPV6_ADDR_MULTICAST)) { | |
1187 | in6_dev_put(idev); | |
1188 | return -EINVAL; | |
1189 | } | |
1190 | ||
1191 | if (len == 24) { | |
1192 | int switchback; | |
1193 | /* MLDv1 router present */ | |
1194 | ||
1195 | /* Translate milliseconds to jiffies */ | |
1196 | max_delay = (ntohs(hdr->icmp6_maxdelay)*HZ)/1000; | |
1197 | ||
1198 | switchback = (idev->mc_qrv + 1) * max_delay; | |
1199 | idev->mc_v1_seen = jiffies + switchback; | |
1200 | ||
1201 | /* cancel the interface change timer */ | |
1202 | idev->mc_ifc_count = 0; | |
1203 | if (del_timer(&idev->mc_ifc_timer)) | |
1204 | __in6_dev_put(idev); | |
1205 | /* clear deleted report items */ | |
1206 | mld_clear_delrec(idev); | |
1207 | } else if (len >= 28) { | |
1ab1457c | 1208 | int srcs_offset = sizeof(struct mld2_query) - |
97300b5f YZ |
1209 | sizeof(struct icmp6hdr); |
1210 | if (!pskb_may_pull(skb, srcs_offset)) { | |
1211 | in6_dev_put(idev); | |
1212 | return -EINVAL; | |
1213 | } | |
9c70220b | 1214 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
1da177e4 LT |
1215 | max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000; |
1216 | if (!max_delay) | |
1217 | max_delay = 1; | |
1218 | idev->mc_maxdelay = max_delay; | |
1219 | if (mlh2->qrv) | |
1220 | idev->mc_qrv = mlh2->qrv; | |
1221 | if (group_type == IPV6_ADDR_ANY) { /* general query */ | |
1222 | if (mlh2->nsrcs) { | |
1223 | in6_dev_put(idev); | |
1224 | return -EINVAL; /* no sources allowed */ | |
1225 | } | |
1226 | mld_gq_start_timer(idev); | |
1227 | in6_dev_put(idev); | |
1228 | return 0; | |
1229 | } | |
1230 | /* mark sources to include, if group & source-specific */ | |
97300b5f | 1231 | if (mlh2->nsrcs != 0) { |
1ab1457c | 1232 | if (!pskb_may_pull(skb, srcs_offset + |
5ab4a6c8 | 1233 | ntohs(mlh2->nsrcs) * sizeof(struct in6_addr))) { |
97300b5f YZ |
1234 | in6_dev_put(idev); |
1235 | return -EINVAL; | |
1236 | } | |
9c70220b | 1237 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
97300b5f YZ |
1238 | mark = 1; |
1239 | } | |
1da177e4 LT |
1240 | } else { |
1241 | in6_dev_put(idev); | |
1242 | return -EINVAL; | |
1243 | } | |
1244 | ||
1245 | read_lock_bh(&idev->lock); | |
1246 | if (group_type == IPV6_ADDR_ANY) { | |
1247 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
1248 | spin_lock_bh(&ma->mca_lock); | |
1249 | igmp6_group_queried(ma, max_delay); | |
1250 | spin_unlock_bh(&ma->mca_lock); | |
1251 | } | |
1252 | } else { | |
1253 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
7add2a43 | 1254 | if (!ipv6_addr_equal(group, &ma->mca_addr)) |
1da177e4 LT |
1255 | continue; |
1256 | spin_lock_bh(&ma->mca_lock); | |
1257 | if (ma->mca_flags & MAF_TIMER_RUNNING) { | |
1258 | /* gsquery <- gsquery && mark */ | |
1259 | if (!mark) | |
1260 | ma->mca_flags &= ~MAF_GSQUERY; | |
1261 | } else { | |
1262 | /* gsquery <- mark */ | |
1263 | if (mark) | |
1264 | ma->mca_flags |= MAF_GSQUERY; | |
1265 | else | |
1266 | ma->mca_flags &= ~MAF_GSQUERY; | |
1267 | } | |
5ab4a6c8 | 1268 | if (!(ma->mca_flags & MAF_GSQUERY) || |
7add2a43 | 1269 | mld_marksources(ma, ntohs(mlh2->nsrcs), mlh2->srcs)) |
5ab4a6c8 | 1270 | igmp6_group_queried(ma, max_delay); |
1da177e4 | 1271 | spin_unlock_bh(&ma->mca_lock); |
7add2a43 | 1272 | break; |
1da177e4 LT |
1273 | } |
1274 | } | |
1275 | read_unlock_bh(&idev->lock); | |
1276 | in6_dev_put(idev); | |
1277 | ||
1278 | return 0; | |
1279 | } | |
1280 | ||
1281 | ||
1282 | int igmp6_event_report(struct sk_buff *skb) | |
1283 | { | |
1284 | struct ifmcaddr6 *ma; | |
1285 | struct in6_addr *addrp; | |
1286 | struct inet6_dev *idev; | |
1287 | struct icmp6hdr *hdr; | |
1288 | int addr_type; | |
1289 | ||
1290 | /* Our own report looped back. Ignore it. */ | |
1291 | if (skb->pkt_type == PACKET_LOOPBACK) | |
1292 | return 0; | |
1293 | ||
24c69275 DS |
1294 | /* send our report if the MC router may not have heard this report */ |
1295 | if (skb->pkt_type != PACKET_MULTICAST && | |
1296 | skb->pkt_type != PACKET_BROADCAST) | |
1297 | return 0; | |
1298 | ||
1da177e4 LT |
1299 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) |
1300 | return -EINVAL; | |
1301 | ||
cc70ab26 | 1302 | hdr = icmp6_hdr(skb); |
1da177e4 LT |
1303 | |
1304 | /* Drop reports with not link local source */ | |
0660e03f | 1305 | addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr); |
1ab1457c | 1306 | if (addr_type != IPV6_ADDR_ANY && |
1da177e4 LT |
1307 | !(addr_type&IPV6_ADDR_LINKLOCAL)) |
1308 | return -EINVAL; | |
1309 | ||
1310 | addrp = (struct in6_addr *) (hdr + 1); | |
1311 | ||
1312 | idev = in6_dev_get(skb->dev); | |
1313 | if (idev == NULL) | |
1314 | return -ENODEV; | |
1315 | ||
1316 | /* | |
1317 | * Cancel the timer for this group | |
1318 | */ | |
1319 | ||
1320 | read_lock_bh(&idev->lock); | |
1321 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
1322 | if (ipv6_addr_equal(&ma->mca_addr, addrp)) { | |
1323 | spin_lock(&ma->mca_lock); | |
1324 | if (del_timer(&ma->mca_timer)) | |
1325 | atomic_dec(&ma->mca_refcnt); | |
1326 | ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING); | |
1327 | spin_unlock(&ma->mca_lock); | |
1328 | break; | |
1329 | } | |
1330 | } | |
1331 | read_unlock_bh(&idev->lock); | |
1332 | in6_dev_put(idev); | |
1333 | return 0; | |
1334 | } | |
1335 | ||
1336 | static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type, | |
1337 | int gdeleted, int sdeleted) | |
1338 | { | |
1339 | switch (type) { | |
1340 | case MLD2_MODE_IS_INCLUDE: | |
1341 | case MLD2_MODE_IS_EXCLUDE: | |
1342 | if (gdeleted || sdeleted) | |
1343 | return 0; | |
5ab4a6c8 DS |
1344 | if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) { |
1345 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1346 | return 1; | |
1347 | /* don't include if this source is excluded | |
1348 | * in all filters | |
1349 | */ | |
1350 | if (psf->sf_count[MCAST_INCLUDE]) | |
7add2a43 | 1351 | return type == MLD2_MODE_IS_INCLUDE; |
5ab4a6c8 DS |
1352 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1353 | psf->sf_count[MCAST_EXCLUDE]; | |
1354 | } | |
1355 | return 0; | |
1da177e4 LT |
1356 | case MLD2_CHANGE_TO_INCLUDE: |
1357 | if (gdeleted || sdeleted) | |
1358 | return 0; | |
1359 | return psf->sf_count[MCAST_INCLUDE] != 0; | |
1360 | case MLD2_CHANGE_TO_EXCLUDE: | |
1361 | if (gdeleted || sdeleted) | |
1362 | return 0; | |
1363 | if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 || | |
1364 | psf->sf_count[MCAST_INCLUDE]) | |
1365 | return 0; | |
1366 | return pmc->mca_sfcount[MCAST_EXCLUDE] == | |
1367 | psf->sf_count[MCAST_EXCLUDE]; | |
1368 | case MLD2_ALLOW_NEW_SOURCES: | |
1369 | if (gdeleted || !psf->sf_crcount) | |
1370 | return 0; | |
1371 | return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted; | |
1372 | case MLD2_BLOCK_OLD_SOURCES: | |
1373 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1374 | return gdeleted || (psf->sf_crcount && sdeleted); | |
1375 | return psf->sf_crcount && !gdeleted && !sdeleted; | |
1376 | } | |
1377 | return 0; | |
1378 | } | |
1379 | ||
1380 | static int | |
1381 | mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted) | |
1382 | { | |
1383 | struct ip6_sf_list *psf; | |
1384 | int scount = 0; | |
1385 | ||
1386 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1387 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) | |
1388 | continue; | |
1389 | scount++; | |
1390 | } | |
1391 | return scount; | |
1392 | } | |
1393 | ||
1394 | static struct sk_buff *mld_newpack(struct net_device *dev, int size) | |
1395 | { | |
1396 | struct sock *sk = igmp6_socket->sk; | |
1397 | struct sk_buff *skb; | |
1398 | struct mld2_report *pmr; | |
1399 | struct in6_addr addr_buf; | |
1400 | int err; | |
1401 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1402 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1403 | IPV6_TLV_PADN, 0 }; | |
1404 | ||
1405 | /* we assume size > sizeof(ra) here */ | |
1406 | skb = sock_alloc_send_skb(sk, size + LL_RESERVED_SPACE(dev), 1, &err); | |
1407 | ||
cfcabdcc | 1408 | if (!skb) |
1da177e4 LT |
1409 | return NULL; |
1410 | ||
1411 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
1da177e4 | 1412 | |
95c385b4 | 1413 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1414 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1415 | * use unspecified address as the source address |
1da177e4 LT |
1416 | * when a valid link-local address is not available. |
1417 | */ | |
1418 | memset(&addr_buf, 0, sizeof(addr_buf)); | |
1419 | } | |
1420 | ||
1421 | ip6_nd_hdr(sk, skb, dev, &addr_buf, &mld2_all_mcr, NEXTHDR_HOP, 0); | |
1422 | ||
1423 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1424 | ||
27a884dc | 1425 | skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data); |
d10ba34b ACM |
1426 | skb_put(skb, sizeof(*pmr)); |
1427 | pmr = (struct mld2_report *)skb_transport_header(skb); | |
1da177e4 LT |
1428 | pmr->type = ICMPV6_MLD2_REPORT; |
1429 | pmr->resv1 = 0; | |
1430 | pmr->csum = 0; | |
1431 | pmr->resv2 = 0; | |
1432 | pmr->ngrec = 0; | |
1433 | return skb; | |
1434 | } | |
1435 | ||
e9823185 PM |
1436 | static inline int mld_dev_queue_xmit2(struct sk_buff *skb) |
1437 | { | |
1438 | struct net_device *dev = skb->dev; | |
0c4e8581 | 1439 | unsigned char ha[MAX_ADDR_LEN]; |
e9823185 | 1440 | |
0c4e8581 SH |
1441 | ndisc_mc_map(&ipv6_hdr(skb)->daddr, ha, dev, 1); |
1442 | if (dev_hard_header(skb, dev, ETH_P_IPV6, ha, NULL, skb->len) < 0) { | |
1443 | kfree_skb(skb); | |
1444 | return -EINVAL; | |
e9823185 PM |
1445 | } |
1446 | return dev_queue_xmit(skb); | |
1447 | } | |
1448 | ||
1449 | static inline int mld_dev_queue_xmit(struct sk_buff *skb) | |
1450 | { | |
6e23ae2a | 1451 | return NF_HOOK(PF_INET6, NF_INET_POST_ROUTING, skb, NULL, skb->dev, |
1ab1457c | 1452 | mld_dev_queue_xmit2); |
e9823185 PM |
1453 | } |
1454 | ||
1da177e4 LT |
1455 | static void mld_sendpack(struct sk_buff *skb) |
1456 | { | |
0660e03f | 1457 | struct ipv6hdr *pip6 = ipv6_hdr(skb); |
9c70220b ACM |
1458 | struct mld2_report *pmr = |
1459 | (struct mld2_report *)skb_transport_header(skb); | |
1da177e4 LT |
1460 | int payload_len, mldlen; |
1461 | struct inet6_dev *idev = in6_dev_get(skb->dev); | |
1462 | int err; | |
1463 | ||
a11d206d | 1464 | IP6_INC_STATS(idev, IPSTATS_MIB_OUTREQUESTS); |
27a884dc ACM |
1465 | payload_len = (skb->tail - skb->network_header) - sizeof(*pip6); |
1466 | mldlen = skb->tail - skb->transport_header; | |
1da177e4 LT |
1467 | pip6->payload_len = htons(payload_len); |
1468 | ||
1469 | pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen, | |
9c70220b ACM |
1470 | IPPROTO_ICMPV6, csum_partial(skb_transport_header(skb), |
1471 | mldlen, 0)); | |
6e23ae2a | 1472 | err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
e9823185 | 1473 | mld_dev_queue_xmit); |
1da177e4 | 1474 | if (!err) { |
14878f75 DS |
1475 | ICMP6MSGOUT_INC_STATS_BH(idev, ICMPV6_MLD2_REPORT); |
1476 | ICMP6_INC_STATS_BH(idev, ICMP6_MIB_OUTMSGS); | |
1477 | IP6_INC_STATS_BH(idev, IPSTATS_MIB_OUTMCASTPKTS); | |
1da177e4 | 1478 | } else |
14878f75 | 1479 | IP6_INC_STATS_BH(idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 LT |
1480 | |
1481 | if (likely(idev != NULL)) | |
1482 | in6_dev_put(idev); | |
1483 | } | |
1484 | ||
1485 | static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel) | |
1486 | { | |
fab10fe3 | 1487 | return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel); |
1da177e4 LT |
1488 | } |
1489 | ||
1490 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1491 | int type, struct mld2_grec **ppgr) | |
1492 | { | |
1493 | struct net_device *dev = pmc->idev->dev; | |
1494 | struct mld2_report *pmr; | |
1495 | struct mld2_grec *pgr; | |
1496 | ||
1497 | if (!skb) | |
1498 | skb = mld_newpack(dev, dev->mtu); | |
1499 | if (!skb) | |
1500 | return NULL; | |
1501 | pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec)); | |
1502 | pgr->grec_type = type; | |
1503 | pgr->grec_auxwords = 0; | |
1504 | pgr->grec_nsrcs = 0; | |
1505 | pgr->grec_mca = pmc->mca_addr; /* structure copy */ | |
9c70220b | 1506 | pmr = (struct mld2_report *)skb_transport_header(skb); |
1da177e4 LT |
1507 | pmr->ngrec = htons(ntohs(pmr->ngrec)+1); |
1508 | *ppgr = pgr; | |
1509 | return skb; | |
1510 | } | |
1511 | ||
1512 | #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \ | |
1513 | skb_tailroom(skb)) : 0) | |
1514 | ||
1515 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1516 | int type, int gdeleted, int sdeleted) | |
1517 | { | |
1518 | struct net_device *dev = pmc->idev->dev; | |
1519 | struct mld2_report *pmr; | |
1520 | struct mld2_grec *pgr = NULL; | |
1521 | struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list; | |
5ab4a6c8 | 1522 | int scount, stotal, first, isquery, truncate; |
1da177e4 LT |
1523 | |
1524 | if (pmc->mca_flags & MAF_NOREPORT) | |
1525 | return skb; | |
1526 | ||
1527 | isquery = type == MLD2_MODE_IS_INCLUDE || | |
1528 | type == MLD2_MODE_IS_EXCLUDE; | |
1529 | truncate = type == MLD2_MODE_IS_EXCLUDE || | |
1530 | type == MLD2_CHANGE_TO_EXCLUDE; | |
1531 | ||
5ab4a6c8 DS |
1532 | stotal = scount = 0; |
1533 | ||
1da177e4 LT |
1534 | psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources; |
1535 | ||
5ab4a6c8 DS |
1536 | if (!*psf_list) |
1537 | goto empty_source; | |
1538 | ||
9c70220b | 1539 | pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL; |
1da177e4 LT |
1540 | |
1541 | /* EX and TO_EX get a fresh packet, if needed */ | |
1542 | if (truncate) { | |
1543 | if (pmr && pmr->ngrec && | |
1544 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { | |
1545 | if (skb) | |
1546 | mld_sendpack(skb); | |
1547 | skb = mld_newpack(dev, dev->mtu); | |
1548 | } | |
1549 | } | |
1550 | first = 1; | |
1da177e4 LT |
1551 | psf_prev = NULL; |
1552 | for (psf=*psf_list; psf; psf=psf_next) { | |
1553 | struct in6_addr *psrc; | |
1554 | ||
1555 | psf_next = psf->sf_next; | |
1556 | ||
1557 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) { | |
1558 | psf_prev = psf; | |
1559 | continue; | |
1560 | } | |
1561 | ||
1562 | /* clear marks on query responses */ | |
1563 | if (isquery) | |
1564 | psf->sf_gsresp = 0; | |
1565 | ||
1566 | if (AVAILABLE(skb) < sizeof(*psrc) + | |
1567 | first*sizeof(struct mld2_grec)) { | |
1568 | if (truncate && !first) | |
1569 | break; /* truncate these */ | |
1570 | if (pgr) | |
1571 | pgr->grec_nsrcs = htons(scount); | |
1572 | if (skb) | |
1573 | mld_sendpack(skb); | |
1574 | skb = mld_newpack(dev, dev->mtu); | |
1575 | first = 1; | |
1576 | scount = 0; | |
1577 | } | |
1578 | if (first) { | |
1579 | skb = add_grhead(skb, pmc, type, &pgr); | |
1580 | first = 0; | |
1581 | } | |
cc63f70b AD |
1582 | if (!skb) |
1583 | return NULL; | |
1da177e4 LT |
1584 | psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc)); |
1585 | *psrc = psf->sf_addr; | |
5ab4a6c8 | 1586 | scount++; stotal++; |
1da177e4 LT |
1587 | if ((type == MLD2_ALLOW_NEW_SOURCES || |
1588 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) { | |
1589 | psf->sf_crcount--; | |
1590 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { | |
1591 | if (psf_prev) | |
1592 | psf_prev->sf_next = psf->sf_next; | |
1593 | else | |
1594 | *psf_list = psf->sf_next; | |
1595 | kfree(psf); | |
1596 | continue; | |
1597 | } | |
1598 | } | |
1599 | psf_prev = psf; | |
1600 | } | |
5ab4a6c8 DS |
1601 | |
1602 | empty_source: | |
1603 | if (!stotal) { | |
1604 | if (type == MLD2_ALLOW_NEW_SOURCES || | |
1605 | type == MLD2_BLOCK_OLD_SOURCES) | |
1606 | return skb; | |
1607 | if (pmc->mca_crcount || isquery) { | |
1608 | /* make sure we have room for group header */ | |
1609 | if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) { | |
1610 | mld_sendpack(skb); | |
1611 | skb = NULL; /* add_grhead will get a new one */ | |
1612 | } | |
1613 | skb = add_grhead(skb, pmc, type, &pgr); | |
1614 | } | |
1615 | } | |
1da177e4 LT |
1616 | if (pgr) |
1617 | pgr->grec_nsrcs = htons(scount); | |
1618 | ||
1619 | if (isquery) | |
1620 | pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */ | |
1621 | return skb; | |
1622 | } | |
1623 | ||
1624 | static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc) | |
1625 | { | |
1626 | struct sk_buff *skb = NULL; | |
1627 | int type; | |
1628 | ||
1629 | if (!pmc) { | |
1630 | read_lock_bh(&idev->lock); | |
1631 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1632 | if (pmc->mca_flags & MAF_NOREPORT) | |
1633 | continue; | |
1634 | spin_lock_bh(&pmc->mca_lock); | |
1635 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1636 | type = MLD2_MODE_IS_EXCLUDE; | |
1637 | else | |
1638 | type = MLD2_MODE_IS_INCLUDE; | |
1639 | skb = add_grec(skb, pmc, type, 0, 0); | |
1640 | spin_unlock_bh(&pmc->mca_lock); | |
1641 | } | |
1642 | read_unlock_bh(&idev->lock); | |
1643 | } else { | |
1644 | spin_lock_bh(&pmc->mca_lock); | |
1645 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1646 | type = MLD2_MODE_IS_EXCLUDE; | |
1647 | else | |
1648 | type = MLD2_MODE_IS_INCLUDE; | |
1649 | skb = add_grec(skb, pmc, type, 0, 0); | |
1650 | spin_unlock_bh(&pmc->mca_lock); | |
1651 | } | |
1652 | if (skb) | |
1653 | mld_sendpack(skb); | |
1654 | } | |
1655 | ||
1656 | /* | |
1657 | * remove zero-count source records from a source filter list | |
1658 | */ | |
1659 | static void mld_clear_zeros(struct ip6_sf_list **ppsf) | |
1660 | { | |
1661 | struct ip6_sf_list *psf_prev, *psf_next, *psf; | |
1662 | ||
1663 | psf_prev = NULL; | |
1664 | for (psf=*ppsf; psf; psf = psf_next) { | |
1665 | psf_next = psf->sf_next; | |
1666 | if (psf->sf_crcount == 0) { | |
1667 | if (psf_prev) | |
1668 | psf_prev->sf_next = psf->sf_next; | |
1669 | else | |
1670 | *ppsf = psf->sf_next; | |
1671 | kfree(psf); | |
1672 | } else | |
1673 | psf_prev = psf; | |
1674 | } | |
1675 | } | |
1676 | ||
1677 | static void mld_send_cr(struct inet6_dev *idev) | |
1678 | { | |
1679 | struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next; | |
1680 | struct sk_buff *skb = NULL; | |
1681 | int type, dtype; | |
1682 | ||
1683 | read_lock_bh(&idev->lock); | |
1684 | write_lock_bh(&idev->mc_lock); | |
1685 | ||
1686 | /* deleted MCA's */ | |
1687 | pmc_prev = NULL; | |
1688 | for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) { | |
1689 | pmc_next = pmc->next; | |
1690 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
1691 | type = MLD2_BLOCK_OLD_SOURCES; | |
1692 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1693 | skb = add_grec(skb, pmc, type, 1, 0); | |
1694 | skb = add_grec(skb, pmc, dtype, 1, 1); | |
1695 | } | |
1696 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1697 | if (pmc->mca_sfmode == MCAST_EXCLUDE) { |
1698 | type = MLD2_CHANGE_TO_INCLUDE; | |
1699 | skb = add_grec(skb, pmc, type, 1, 0); | |
1700 | } | |
5ab4a6c8 | 1701 | pmc->mca_crcount--; |
1da177e4 LT |
1702 | if (pmc->mca_crcount == 0) { |
1703 | mld_clear_zeros(&pmc->mca_tomb); | |
1704 | mld_clear_zeros(&pmc->mca_sources); | |
1705 | } | |
1706 | } | |
1707 | if (pmc->mca_crcount == 0 && !pmc->mca_tomb && | |
1708 | !pmc->mca_sources) { | |
1709 | if (pmc_prev) | |
1710 | pmc_prev->next = pmc_next; | |
1711 | else | |
1712 | idev->mc_tomb = pmc_next; | |
1713 | in6_dev_put(pmc->idev); | |
1714 | kfree(pmc); | |
1715 | } else | |
1716 | pmc_prev = pmc; | |
1717 | } | |
1718 | write_unlock_bh(&idev->mc_lock); | |
1719 | ||
1720 | /* change recs */ | |
1721 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1722 | spin_lock_bh(&pmc->mca_lock); | |
1723 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1724 | type = MLD2_BLOCK_OLD_SOURCES; | |
1725 | dtype = MLD2_ALLOW_NEW_SOURCES; | |
1726 | } else { | |
1727 | type = MLD2_ALLOW_NEW_SOURCES; | |
1728 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1729 | } | |
1730 | skb = add_grec(skb, pmc, type, 0, 0); | |
1731 | skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */ | |
1732 | ||
1733 | /* filter mode changes */ | |
1734 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1735 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
1736 | type = MLD2_CHANGE_TO_EXCLUDE; | |
1737 | else | |
1738 | type = MLD2_CHANGE_TO_INCLUDE; | |
1739 | skb = add_grec(skb, pmc, type, 0, 0); | |
5ab4a6c8 | 1740 | pmc->mca_crcount--; |
1da177e4 LT |
1741 | } |
1742 | spin_unlock_bh(&pmc->mca_lock); | |
1743 | } | |
1744 | read_unlock_bh(&idev->lock); | |
1745 | if (!skb) | |
1746 | return; | |
1747 | (void) mld_sendpack(skb); | |
1748 | } | |
1749 | ||
1750 | static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type) | |
1751 | { | |
1752 | struct sock *sk = igmp6_socket->sk; | |
1753 | struct inet6_dev *idev; | |
1ab1457c YH |
1754 | struct sk_buff *skb; |
1755 | struct icmp6hdr *hdr; | |
1da177e4 LT |
1756 | struct in6_addr *snd_addr; |
1757 | struct in6_addr *addrp; | |
1758 | struct in6_addr addr_buf; | |
1759 | struct in6_addr all_routers; | |
1760 | int err, len, payload_len, full_len; | |
1761 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1762 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1763 | IPV6_TLV_PADN, 0 }; | |
1764 | ||
a11d206d YH |
1765 | rcu_read_lock(); |
1766 | IP6_INC_STATS(__in6_dev_get(dev), | |
1767 | IPSTATS_MIB_OUTREQUESTS); | |
1768 | rcu_read_unlock(); | |
1da177e4 LT |
1769 | snd_addr = addr; |
1770 | if (type == ICMPV6_MGM_REDUCTION) { | |
1771 | snd_addr = &all_routers; | |
1772 | ipv6_addr_all_routers(&all_routers); | |
1773 | } | |
1774 | ||
1775 | len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); | |
1776 | payload_len = len + sizeof(ra); | |
1777 | full_len = sizeof(struct ipv6hdr) + payload_len; | |
1778 | ||
1779 | skb = sock_alloc_send_skb(sk, LL_RESERVED_SPACE(dev) + full_len, 1, &err); | |
1780 | ||
1781 | if (skb == NULL) { | |
a11d206d YH |
1782 | rcu_read_lock(); |
1783 | IP6_INC_STATS(__in6_dev_get(dev), | |
1784 | IPSTATS_MIB_OUTDISCARDS); | |
1785 | rcu_read_unlock(); | |
1da177e4 LT |
1786 | return; |
1787 | } | |
1788 | ||
1789 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
1da177e4 | 1790 | |
95c385b4 | 1791 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1792 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1793 | * use unspecified address as the source address |
1da177e4 LT |
1794 | * when a valid link-local address is not available. |
1795 | */ | |
1796 | memset(&addr_buf, 0, sizeof(addr_buf)); | |
1797 | } | |
1798 | ||
1799 | ip6_nd_hdr(sk, skb, dev, &addr_buf, snd_addr, NEXTHDR_HOP, payload_len); | |
1800 | ||
1801 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1802 | ||
1803 | hdr = (struct icmp6hdr *) skb_put(skb, sizeof(struct icmp6hdr)); | |
1804 | memset(hdr, 0, sizeof(struct icmp6hdr)); | |
1805 | hdr->icmp6_type = type; | |
1806 | ||
1807 | addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr)); | |
1808 | ipv6_addr_copy(addrp, addr); | |
1809 | ||
1810 | hdr->icmp6_cksum = csum_ipv6_magic(&addr_buf, snd_addr, len, | |
1811 | IPPROTO_ICMPV6, | |
1812 | csum_partial((__u8 *) hdr, len, 0)); | |
1813 | ||
1814 | idev = in6_dev_get(skb->dev); | |
1815 | ||
6e23ae2a | 1816 | err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
e9823185 | 1817 | mld_dev_queue_xmit); |
1da177e4 | 1818 | if (!err) { |
14878f75 | 1819 | ICMP6MSGOUT_INC_STATS(idev, type); |
1da177e4 | 1820 | ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS); |
a11d206d | 1821 | IP6_INC_STATS(idev, IPSTATS_MIB_OUTMCASTPKTS); |
1da177e4 | 1822 | } else |
a11d206d | 1823 | IP6_INC_STATS(idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 LT |
1824 | |
1825 | if (likely(idev != NULL)) | |
1826 | in6_dev_put(idev); | |
1827 | return; | |
1da177e4 LT |
1828 | } |
1829 | ||
1830 | static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode, | |
1831 | struct in6_addr *psfsrc) | |
1832 | { | |
1833 | struct ip6_sf_list *psf, *psf_prev; | |
1834 | int rv = 0; | |
1835 | ||
1836 | psf_prev = NULL; | |
1837 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1838 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) | |
1839 | break; | |
1840 | psf_prev = psf; | |
1841 | } | |
1842 | if (!psf || psf->sf_count[sfmode] == 0) { | |
1843 | /* source filter not found, or count wrong => bug */ | |
1844 | return -ESRCH; | |
1845 | } | |
1846 | psf->sf_count[sfmode]--; | |
1847 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { | |
1848 | struct inet6_dev *idev = pmc->idev; | |
1849 | ||
1850 | /* no more filters for this source */ | |
1851 | if (psf_prev) | |
1852 | psf_prev->sf_next = psf->sf_next; | |
1853 | else | |
1854 | pmc->mca_sources = psf->sf_next; | |
1855 | if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) && | |
1856 | !MLD_V1_SEEN(idev)) { | |
1857 | psf->sf_crcount = idev->mc_qrv; | |
1858 | psf->sf_next = pmc->mca_tomb; | |
1859 | pmc->mca_tomb = psf; | |
1860 | rv = 1; | |
1861 | } else | |
1862 | kfree(psf); | |
1863 | } | |
1864 | return rv; | |
1865 | } | |
1866 | ||
1867 | static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
1868 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
1869 | int delta) | |
1870 | { | |
1871 | struct ifmcaddr6 *pmc; | |
1872 | int changerec = 0; | |
1873 | int i, err; | |
1874 | ||
1875 | if (!idev) | |
1876 | return -ENODEV; | |
1877 | read_lock_bh(&idev->lock); | |
1878 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1879 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) | |
1880 | break; | |
1881 | } | |
1882 | if (!pmc) { | |
1883 | /* MCA not found?? bug */ | |
1884 | read_unlock_bh(&idev->lock); | |
1885 | return -ESRCH; | |
1886 | } | |
1887 | spin_lock_bh(&pmc->mca_lock); | |
1888 | sf_markstate(pmc); | |
1889 | if (!delta) { | |
1890 | if (!pmc->mca_sfcount[sfmode]) { | |
1891 | spin_unlock_bh(&pmc->mca_lock); | |
1892 | read_unlock_bh(&idev->lock); | |
1893 | return -EINVAL; | |
1894 | } | |
1895 | pmc->mca_sfcount[sfmode]--; | |
1896 | } | |
1897 | err = 0; | |
1898 | for (i=0; i<sfcount; i++) { | |
1899 | int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); | |
1900 | ||
1901 | changerec |= rv > 0; | |
1902 | if (!err && rv < 0) | |
1903 | err = rv; | |
1904 | } | |
1905 | if (pmc->mca_sfmode == MCAST_EXCLUDE && | |
1906 | pmc->mca_sfcount[MCAST_EXCLUDE] == 0 && | |
1907 | pmc->mca_sfcount[MCAST_INCLUDE]) { | |
1908 | struct ip6_sf_list *psf; | |
1909 | ||
1910 | /* filter mode change */ | |
1911 | pmc->mca_sfmode = MCAST_INCLUDE; | |
1912 | pmc->mca_crcount = idev->mc_qrv; | |
1913 | idev->mc_ifc_count = pmc->mca_crcount; | |
1914 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) | |
1915 | psf->sf_crcount = 0; | |
1916 | mld_ifc_event(pmc->idev); | |
1917 | } else if (sf_setstate(pmc) || changerec) | |
1918 | mld_ifc_event(pmc->idev); | |
1919 | spin_unlock_bh(&pmc->mca_lock); | |
1920 | read_unlock_bh(&idev->lock); | |
1921 | return err; | |
1922 | } | |
1923 | ||
1924 | /* | |
1925 | * Add multicast single-source filter to the interface list | |
1926 | */ | |
1927 | static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode, | |
1928 | struct in6_addr *psfsrc, int delta) | |
1929 | { | |
1930 | struct ip6_sf_list *psf, *psf_prev; | |
1931 | ||
1932 | psf_prev = NULL; | |
1933 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1934 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) | |
1935 | break; | |
1936 | psf_prev = psf; | |
1937 | } | |
1938 | if (!psf) { | |
0c600eda | 1939 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
1da177e4 LT |
1940 | if (!psf) |
1941 | return -ENOBUFS; | |
0c600eda | 1942 | |
1da177e4 LT |
1943 | psf->sf_addr = *psfsrc; |
1944 | if (psf_prev) { | |
1945 | psf_prev->sf_next = psf; | |
1946 | } else | |
1947 | pmc->mca_sources = psf; | |
1948 | } | |
1949 | psf->sf_count[sfmode]++; | |
1950 | return 0; | |
1951 | } | |
1952 | ||
1953 | static void sf_markstate(struct ifmcaddr6 *pmc) | |
1954 | { | |
1955 | struct ip6_sf_list *psf; | |
1956 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; | |
1957 | ||
1958 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) | |
1959 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1960 | psf->sf_oldin = mca_xcount == | |
1961 | psf->sf_count[MCAST_EXCLUDE] && | |
1962 | !psf->sf_count[MCAST_INCLUDE]; | |
1963 | } else | |
1964 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; | |
1965 | } | |
1966 | ||
1967 | static int sf_setstate(struct ifmcaddr6 *pmc) | |
1968 | { | |
7add2a43 | 1969 | struct ip6_sf_list *psf, *dpsf; |
1da177e4 LT |
1970 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
1971 | int qrv = pmc->idev->mc_qrv; | |
1972 | int new_in, rv; | |
1973 | ||
1974 | rv = 0; | |
1975 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1976 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1977 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && | |
1978 | !psf->sf_count[MCAST_INCLUDE]; | |
1979 | } else | |
1980 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; | |
7add2a43 DS |
1981 | if (new_in) { |
1982 | if (!psf->sf_oldin) { | |
e80e28b6 | 1983 | struct ip6_sf_list *prev = NULL; |
7add2a43 DS |
1984 | |
1985 | for (dpsf=pmc->mca_tomb; dpsf; | |
1986 | dpsf=dpsf->sf_next) { | |
1987 | if (ipv6_addr_equal(&dpsf->sf_addr, | |
1988 | &psf->sf_addr)) | |
1989 | break; | |
1990 | prev = dpsf; | |
1991 | } | |
1992 | if (dpsf) { | |
1993 | if (prev) | |
1994 | prev->sf_next = dpsf->sf_next; | |
1995 | else | |
1996 | pmc->mca_tomb = dpsf->sf_next; | |
1997 | kfree(dpsf); | |
1998 | } | |
1999 | psf->sf_crcount = qrv; | |
2000 | rv++; | |
2001 | } | |
2002 | } else if (psf->sf_oldin) { | |
2003 | psf->sf_crcount = 0; | |
2004 | /* | |
2005 | * add or update "delete" records if an active filter | |
2006 | * is now inactive | |
2007 | */ | |
2008 | for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next) | |
2009 | if (ipv6_addr_equal(&dpsf->sf_addr, | |
2010 | &psf->sf_addr)) | |
2011 | break; | |
2012 | if (!dpsf) { | |
2013 | dpsf = (struct ip6_sf_list *) | |
2014 | kmalloc(sizeof(*dpsf), GFP_ATOMIC); | |
2015 | if (!dpsf) | |
2016 | continue; | |
2017 | *dpsf = *psf; | |
2018 | /* pmc->mca_lock held by callers */ | |
2019 | dpsf->sf_next = pmc->mca_tomb; | |
2020 | pmc->mca_tomb = dpsf; | |
2021 | } | |
2022 | dpsf->sf_crcount = qrv; | |
1da177e4 LT |
2023 | rv++; |
2024 | } | |
2025 | } | |
2026 | return rv; | |
2027 | } | |
2028 | ||
2029 | /* | |
2030 | * Add multicast source filter list to the interface list | |
2031 | */ | |
2032 | static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
2033 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
2034 | int delta) | |
2035 | { | |
2036 | struct ifmcaddr6 *pmc; | |
2037 | int isexclude; | |
2038 | int i, err; | |
2039 | ||
2040 | if (!idev) | |
2041 | return -ENODEV; | |
2042 | read_lock_bh(&idev->lock); | |
2043 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
2044 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) | |
2045 | break; | |
2046 | } | |
2047 | if (!pmc) { | |
2048 | /* MCA not found?? bug */ | |
2049 | read_unlock_bh(&idev->lock); | |
2050 | return -ESRCH; | |
2051 | } | |
2052 | spin_lock_bh(&pmc->mca_lock); | |
2053 | ||
2054 | sf_markstate(pmc); | |
2055 | isexclude = pmc->mca_sfmode == MCAST_EXCLUDE; | |
2056 | if (!delta) | |
2057 | pmc->mca_sfcount[sfmode]++; | |
2058 | err = 0; | |
2059 | for (i=0; i<sfcount; i++) { | |
2060 | err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta); | |
2061 | if (err) | |
2062 | break; | |
2063 | } | |
2064 | if (err) { | |
2065 | int j; | |
2066 | ||
2067 | if (!delta) | |
2068 | pmc->mca_sfcount[sfmode]--; | |
2069 | for (j=0; j<i; j++) | |
2070 | (void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); | |
2071 | } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) { | |
2072 | struct inet6_dev *idev = pmc->idev; | |
2073 | struct ip6_sf_list *psf; | |
2074 | ||
2075 | /* filter mode change */ | |
2076 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2077 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
2078 | else if (pmc->mca_sfcount[MCAST_INCLUDE]) | |
2079 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2080 | /* else no filters; keep old mode for reports */ | |
2081 | ||
2082 | pmc->mca_crcount = idev->mc_qrv; | |
2083 | idev->mc_ifc_count = pmc->mca_crcount; | |
2084 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) | |
2085 | psf->sf_crcount = 0; | |
2086 | mld_ifc_event(idev); | |
2087 | } else if (sf_setstate(pmc)) | |
2088 | mld_ifc_event(idev); | |
2089 | spin_unlock_bh(&pmc->mca_lock); | |
2090 | read_unlock_bh(&idev->lock); | |
2091 | return err; | |
2092 | } | |
2093 | ||
2094 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc) | |
2095 | { | |
2096 | struct ip6_sf_list *psf, *nextpsf; | |
2097 | ||
2098 | for (psf=pmc->mca_tomb; psf; psf=nextpsf) { | |
2099 | nextpsf = psf->sf_next; | |
2100 | kfree(psf); | |
2101 | } | |
2102 | pmc->mca_tomb = NULL; | |
2103 | for (psf=pmc->mca_sources; psf; psf=nextpsf) { | |
2104 | nextpsf = psf->sf_next; | |
2105 | kfree(psf); | |
2106 | } | |
2107 | pmc->mca_sources = NULL; | |
2108 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
de9daad9 | 2109 | pmc->mca_sfcount[MCAST_INCLUDE] = 0; |
1da177e4 LT |
2110 | pmc->mca_sfcount[MCAST_EXCLUDE] = 1; |
2111 | } | |
2112 | ||
2113 | ||
2114 | static void igmp6_join_group(struct ifmcaddr6 *ma) | |
2115 | { | |
2116 | unsigned long delay; | |
2117 | ||
2118 | if (ma->mca_flags & MAF_NOREPORT) | |
2119 | return; | |
2120 | ||
2121 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2122 | ||
2123 | delay = net_random() % IGMP6_UNSOLICITED_IVAL; | |
2124 | ||
2125 | spin_lock_bh(&ma->mca_lock); | |
2126 | if (del_timer(&ma->mca_timer)) { | |
2127 | atomic_dec(&ma->mca_refcnt); | |
2128 | delay = ma->mca_timer.expires - jiffies; | |
2129 | } | |
2130 | ||
2131 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
2132 | atomic_inc(&ma->mca_refcnt); | |
2133 | ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER; | |
2134 | spin_unlock_bh(&ma->mca_lock); | |
2135 | } | |
2136 | ||
2137 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
2138 | struct inet6_dev *idev) | |
2139 | { | |
2140 | int err; | |
2141 | ||
5ab4a6c8 DS |
2142 | /* callers have the socket lock and a write lock on ipv6_sk_mc_lock, |
2143 | * so no other readers or writers of iml or its sflist | |
2144 | */ | |
cfcabdcc | 2145 | if (!iml->sflist) { |
1da177e4 LT |
2146 | /* any-source empty exclude case */ |
2147 | return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0); | |
2148 | } | |
2149 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, | |
2150 | iml->sflist->sl_count, iml->sflist->sl_addr, 0); | |
2151 | sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max)); | |
2152 | iml->sflist = NULL; | |
2153 | return err; | |
2154 | } | |
2155 | ||
2156 | static void igmp6_leave_group(struct ifmcaddr6 *ma) | |
2157 | { | |
2158 | if (MLD_V1_SEEN(ma->idev)) { | |
2159 | if (ma->mca_flags & MAF_LAST_REPORTER) | |
2160 | igmp6_send(&ma->mca_addr, ma->idev->dev, | |
2161 | ICMPV6_MGM_REDUCTION); | |
2162 | } else { | |
2163 | mld_add_delrec(ma->idev, ma); | |
2164 | mld_ifc_event(ma->idev); | |
2165 | } | |
2166 | } | |
2167 | ||
2168 | static void mld_gq_timer_expire(unsigned long data) | |
2169 | { | |
2170 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2171 | ||
2172 | idev->mc_gq_running = 0; | |
2173 | mld_send_report(idev, NULL); | |
2174 | __in6_dev_put(idev); | |
2175 | } | |
2176 | ||
2177 | static void mld_ifc_timer_expire(unsigned long data) | |
2178 | { | |
2179 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2180 | ||
2181 | mld_send_cr(idev); | |
2182 | if (idev->mc_ifc_count) { | |
2183 | idev->mc_ifc_count--; | |
2184 | if (idev->mc_ifc_count) | |
2185 | mld_ifc_start_timer(idev, idev->mc_maxdelay); | |
2186 | } | |
2187 | __in6_dev_put(idev); | |
2188 | } | |
2189 | ||
2190 | static void mld_ifc_event(struct inet6_dev *idev) | |
2191 | { | |
2192 | if (MLD_V1_SEEN(idev)) | |
2193 | return; | |
2194 | idev->mc_ifc_count = idev->mc_qrv; | |
2195 | mld_ifc_start_timer(idev, 1); | |
2196 | } | |
2197 | ||
2198 | ||
2199 | static void igmp6_timer_handler(unsigned long data) | |
2200 | { | |
2201 | struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data; | |
2202 | ||
2203 | if (MLD_V1_SEEN(ma->idev)) | |
2204 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2205 | else | |
2206 | mld_send_report(ma->idev, ma); | |
2207 | ||
2208 | spin_lock(&ma->mca_lock); | |
2209 | ma->mca_flags |= MAF_LAST_REPORTER; | |
2210 | ma->mca_flags &= ~MAF_TIMER_RUNNING; | |
2211 | spin_unlock(&ma->mca_lock); | |
2212 | ma_put(ma); | |
2213 | } | |
2214 | ||
2215 | /* Device going down */ | |
2216 | ||
2217 | void ipv6_mc_down(struct inet6_dev *idev) | |
2218 | { | |
2219 | struct ifmcaddr6 *i; | |
2220 | ||
2221 | /* Withdraw multicast list */ | |
2222 | ||
2223 | read_lock_bh(&idev->lock); | |
2224 | idev->mc_ifc_count = 0; | |
2225 | if (del_timer(&idev->mc_ifc_timer)) | |
2226 | __in6_dev_put(idev); | |
2227 | idev->mc_gq_running = 0; | |
2228 | if (del_timer(&idev->mc_gq_timer)) | |
2229 | __in6_dev_put(idev); | |
2230 | ||
2231 | for (i = idev->mc_list; i; i=i->next) | |
2232 | igmp6_group_dropped(i); | |
2233 | read_unlock_bh(&idev->lock); | |
2234 | ||
2235 | mld_clear_delrec(idev); | |
2236 | } | |
2237 | ||
2238 | ||
2239 | /* Device going up */ | |
2240 | ||
2241 | void ipv6_mc_up(struct inet6_dev *idev) | |
2242 | { | |
2243 | struct ifmcaddr6 *i; | |
2244 | ||
2245 | /* Install multicast list, except for all-nodes (already installed) */ | |
2246 | ||
2247 | read_lock_bh(&idev->lock); | |
2248 | for (i = idev->mc_list; i; i=i->next) | |
2249 | igmp6_group_added(i); | |
2250 | read_unlock_bh(&idev->lock); | |
2251 | } | |
2252 | ||
2253 | /* IPv6 device initialization. */ | |
2254 | ||
2255 | void ipv6_mc_init_dev(struct inet6_dev *idev) | |
2256 | { | |
1da177e4 LT |
2257 | write_lock_bh(&idev->lock); |
2258 | rwlock_init(&idev->mc_lock); | |
2259 | idev->mc_gq_running = 0; | |
b24b8a24 PE |
2260 | setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire, |
2261 | (unsigned long)idev); | |
1da177e4 LT |
2262 | idev->mc_tomb = NULL; |
2263 | idev->mc_ifc_count = 0; | |
b24b8a24 PE |
2264 | setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire, |
2265 | (unsigned long)idev); | |
1da177e4 LT |
2266 | idev->mc_qrv = MLD_QRV_DEFAULT; |
2267 | idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL; | |
2268 | idev->mc_v1_seen = 0; | |
2269 | write_unlock_bh(&idev->lock); | |
1da177e4 LT |
2270 | } |
2271 | ||
2272 | /* | |
2273 | * Device is about to be destroyed: clean up. | |
2274 | */ | |
2275 | ||
2276 | void ipv6_mc_destroy_dev(struct inet6_dev *idev) | |
2277 | { | |
2278 | struct ifmcaddr6 *i; | |
2279 | struct in6_addr maddr; | |
2280 | ||
2281 | /* Deactivate timers */ | |
2282 | ipv6_mc_down(idev); | |
2283 | ||
2284 | /* Delete all-nodes address. */ | |
2285 | ipv6_addr_all_nodes(&maddr); | |
2286 | ||
2287 | /* We cannot call ipv6_dev_mc_dec() directly, our caller in | |
2288 | * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will | |
2289 | * fail. | |
2290 | */ | |
2291 | __ipv6_dev_mc_dec(idev, &maddr); | |
2292 | ||
2293 | if (idev->cnf.forwarding) { | |
2294 | ipv6_addr_all_routers(&maddr); | |
2295 | __ipv6_dev_mc_dec(idev, &maddr); | |
2296 | } | |
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 { | |
2313 | struct net_device *dev; | |
2314 | struct inet6_dev *idev; | |
2315 | }; | |
2316 | ||
2317 | #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private) | |
2318 | ||
2319 | static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq) | |
2320 | { | |
2321 | struct ifmcaddr6 *im = NULL; | |
2322 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2323 | ||
7562f876 | 2324 | state->idev = NULL; |
881d966b | 2325 | for_each_netdev(&init_net, state->dev) { |
1da177e4 LT |
2326 | struct inet6_dev *idev; |
2327 | idev = in6_dev_get(state->dev); | |
2328 | if (!idev) | |
2329 | continue; | |
2330 | read_lock_bh(&idev->lock); | |
2331 | im = idev->mc_list; | |
2332 | if (im) { | |
2333 | state->idev = idev; | |
2334 | break; | |
2335 | } | |
2336 | read_unlock_bh(&idev->lock); | |
2337 | in6_dev_put(idev); | |
2338 | } | |
2339 | return im; | |
2340 | } | |
2341 | ||
2342 | static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im) | |
2343 | { | |
2344 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2345 | ||
2346 | im = im->next; | |
2347 | while (!im) { | |
2348 | if (likely(state->idev != NULL)) { | |
2349 | read_unlock_bh(&state->idev->lock); | |
2350 | in6_dev_put(state->idev); | |
2351 | } | |
7562f876 | 2352 | state->dev = next_net_device(state->dev); |
1da177e4 LT |
2353 | if (!state->dev) { |
2354 | state->idev = NULL; | |
2355 | break; | |
2356 | } | |
2357 | state->idev = in6_dev_get(state->dev); | |
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) | |
9a429c49 | 2376 | __acquires(dev_base_lock) |
1da177e4 LT |
2377 | { |
2378 | read_lock(&dev_base_lock); | |
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 | { | |
2384 | struct ifmcaddr6 *im; | |
2385 | im = igmp6_mc_get_next(seq, v); | |
2386 | ++*pos; | |
2387 | return im; | |
2388 | } | |
2389 | ||
2390 | static void igmp6_mc_seq_stop(struct seq_file *seq, void *v) | |
9a429c49 | 2391 | __releases(dev_base_lock) |
1da177e4 LT |
2392 | { |
2393 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2394 | if (likely(state->idev != NULL)) { | |
2395 | read_unlock_bh(&state->idev->lock); | |
2396 | in6_dev_put(state->idev); | |
2397 | state->idev = NULL; | |
2398 | } | |
2399 | state->dev = NULL; | |
2400 | read_unlock(&dev_base_lock); | |
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, | |
1ab1457c | 2409 | "%-4d %-15s " NIP6_SEQFMT " %5d %08X %ld\n", |
1da177e4 LT |
2410 | state->dev->ifindex, state->dev->name, |
2411 | NIP6(im->mca_addr), | |
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 | { | |
cf7732e4 PE |
2427 | return seq_open_private(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, | |
2436 | .release = seq_release_private, | |
2437 | }; | |
2438 | ||
2439 | struct igmp6_mcf_iter_state { | |
2440 | struct net_device *dev; | |
2441 | struct inet6_dev *idev; | |
2442 | struct ifmcaddr6 *im; | |
2443 | }; | |
2444 | ||
2445 | #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private) | |
2446 | ||
2447 | static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq) | |
2448 | { | |
2449 | struct ip6_sf_list *psf = NULL; | |
2450 | struct ifmcaddr6 *im = NULL; | |
2451 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2452 | ||
7562f876 PE |
2453 | state->idev = NULL; |
2454 | state->im = NULL; | |
881d966b | 2455 | for_each_netdev(&init_net, state->dev) { |
1da177e4 LT |
2456 | struct inet6_dev *idev; |
2457 | idev = in6_dev_get(state->dev); | |
2458 | if (unlikely(idev == NULL)) | |
2459 | continue; | |
2460 | read_lock_bh(&idev->lock); | |
2461 | im = idev->mc_list; | |
2462 | if (likely(im != NULL)) { | |
2463 | spin_lock_bh(&im->mca_lock); | |
2464 | psf = im->mca_sources; | |
2465 | if (likely(psf != NULL)) { | |
2466 | state->im = im; | |
2467 | state->idev = idev; | |
2468 | break; | |
2469 | } | |
2470 | spin_unlock_bh(&im->mca_lock); | |
2471 | } | |
2472 | read_unlock_bh(&idev->lock); | |
2473 | in6_dev_put(idev); | |
2474 | } | |
2475 | return psf; | |
2476 | } | |
2477 | ||
2478 | static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf) | |
2479 | { | |
2480 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2481 | ||
2482 | psf = psf->sf_next; | |
2483 | while (!psf) { | |
2484 | spin_unlock_bh(&state->im->mca_lock); | |
2485 | state->im = state->im->next; | |
2486 | while (!state->im) { | |
2487 | if (likely(state->idev != NULL)) { | |
2488 | read_unlock_bh(&state->idev->lock); | |
2489 | in6_dev_put(state->idev); | |
2490 | } | |
7562f876 | 2491 | state->dev = next_net_device(state->dev); |
1da177e4 LT |
2492 | if (!state->dev) { |
2493 | state->idev = NULL; | |
2494 | goto out; | |
2495 | } | |
2496 | state->idev = in6_dev_get(state->dev); | |
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) | |
9a429c49 | 2521 | __acquires(dev_base_lock) |
1da177e4 LT |
2522 | { |
2523 | read_lock(&dev_base_lock); | |
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) | |
9a429c49 | 2539 | __releases(dev_base_lock) |
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); | |
2548 | in6_dev_put(state->idev); | |
2549 | state->idev = NULL; | |
2550 | } | |
2551 | state->dev = NULL; | |
2552 | read_unlock(&dev_base_lock); | |
2553 | } | |
2554 | ||
2555 | static int igmp6_mcf_seq_show(struct seq_file *seq, void *v) | |
2556 | { | |
2557 | struct ip6_sf_list *psf = (struct ip6_sf_list *)v; | |
2558 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2559 | ||
2560 | if (v == SEQ_START_TOKEN) { | |
1ab1457c | 2561 | seq_printf(seq, |
1da177e4 | 2562 | "%3s %6s " |
9343e79a | 2563 | "%32s %32s %6s %6s\n", "Idx", |
1da177e4 LT |
2564 | "Device", "Multicast Address", |
2565 | "Source Address", "INC", "EXC"); | |
2566 | } else { | |
2567 | seq_printf(seq, | |
9343e79a | 2568 | "%3d %6.6s " NIP6_SEQFMT " " NIP6_SEQFMT " %6lu %6lu\n", |
1da177e4 LT |
2569 | state->dev->ifindex, state->dev->name, |
2570 | NIP6(state->im->mca_addr), | |
2571 | NIP6(psf->sf_addr), | |
2572 | psf->sf_count[MCAST_INCLUDE], | |
2573 | psf->sf_count[MCAST_EXCLUDE]); | |
2574 | } | |
2575 | return 0; | |
2576 | } | |
2577 | ||
56b3d975 | 2578 | static const struct seq_operations igmp6_mcf_seq_ops = { |
1da177e4 LT |
2579 | .start = igmp6_mcf_seq_start, |
2580 | .next = igmp6_mcf_seq_next, | |
2581 | .stop = igmp6_mcf_seq_stop, | |
2582 | .show = igmp6_mcf_seq_show, | |
2583 | }; | |
2584 | ||
2585 | static int igmp6_mcf_seq_open(struct inode *inode, struct file *file) | |
2586 | { | |
cf7732e4 PE |
2587 | return seq_open_private(file, &igmp6_mcf_seq_ops, |
2588 | sizeof(struct igmp6_mcf_iter_state)); | |
1da177e4 LT |
2589 | } |
2590 | ||
9a32144e | 2591 | static const struct file_operations igmp6_mcf_seq_fops = { |
1da177e4 LT |
2592 | .owner = THIS_MODULE, |
2593 | .open = igmp6_mcf_seq_open, | |
2594 | .read = seq_read, | |
2595 | .llseek = seq_lseek, | |
2596 | .release = seq_release_private, | |
2597 | }; | |
2598 | #endif | |
2599 | ||
2600 | int __init igmp6_init(struct net_proto_family *ops) | |
2601 | { | |
2602 | struct ipv6_pinfo *np; | |
2603 | struct sock *sk; | |
2604 | int err; | |
2605 | ||
2606 | err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, &igmp6_socket); | |
2607 | if (err < 0) { | |
2608 | printk(KERN_ERR | |
2609 | "Failed to initialize the IGMP6 control socket (err %d).\n", | |
2610 | err); | |
2611 | igmp6_socket = NULL; /* For safety. */ | |
2612 | return err; | |
2613 | } | |
2614 | ||
2615 | sk = igmp6_socket->sk; | |
2616 | sk->sk_allocation = GFP_ATOMIC; | |
2617 | sk->sk_prot->unhash(sk); | |
2618 | ||
2619 | np = inet6_sk(sk); | |
2620 | np->hop_limit = 1; | |
2621 | ||
2622 | #ifdef CONFIG_PROC_FS | |
457c4cbc EB |
2623 | proc_net_fops_create(&init_net, "igmp6", S_IRUGO, &igmp6_mc_seq_fops); |
2624 | proc_net_fops_create(&init_net, "mcfilter6", S_IRUGO, &igmp6_mcf_seq_fops); | |
1da177e4 LT |
2625 | #endif |
2626 | ||
2627 | return 0; | |
2628 | } | |
2629 | ||
2630 | void igmp6_cleanup(void) | |
2631 | { | |
2632 | sock_release(igmp6_socket); | |
2633 | igmp6_socket = NULL; /* for safety */ | |
2634 | ||
2635 | #ifdef CONFIG_PROC_FS | |
457c4cbc EB |
2636 | proc_net_remove(&init_net, "mcfilter6"); |
2637 | proc_net_remove(&init_net, "igmp6"); | |
1da177e4 LT |
2638 | #endif |
2639 | } |