Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Multicast support for IPv6 | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
6 | * Pedro Roque <roque@di.fc.ul.pt> | |
7 | * | |
8 | * $Id: mcast.c,v 1.40 2002/02/08 03:57:19 davem Exp $ | |
9 | * | |
10 | * Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c | |
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 | ||
31 | #include <linux/config.h> | |
32 | #include <linux/module.h> | |
33 | #include <linux/errno.h> | |
34 | #include <linux/types.h> | |
35 | #include <linux/string.h> | |
36 | #include <linux/socket.h> | |
37 | #include <linux/sockios.h> | |
38 | #include <linux/jiffies.h> | |
39 | #include <linux/times.h> | |
40 | #include <linux/net.h> | |
41 | #include <linux/in.h> | |
42 | #include <linux/in6.h> | |
43 | #include <linux/netdevice.h> | |
44 | #include <linux/if_arp.h> | |
45 | #include <linux/route.h> | |
46 | #include <linux/init.h> | |
47 | #include <linux/proc_fs.h> | |
48 | #include <linux/seq_file.h> | |
49 | ||
50 | #include <linux/netfilter.h> | |
51 | #include <linux/netfilter_ipv6.h> | |
52 | ||
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; | |
87 | __u16 grec_nsrcs; | |
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; | |
95 | __u16 csum; | |
96 | __u16 resv2; | |
97 | __u16 ngrec; | |
98 | struct mld2_grec grec[0]; | |
99 | }; | |
100 | ||
101 | struct mld2_query { | |
102 | __u8 type; | |
103 | __u8 code; | |
104 | __u16 csum; | |
105 | __u16 mrc; | |
106 | __u16 resv1; | |
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; | |
120 | __u16 nsrcs; | |
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 LT |
174 | |
175 | int sysctl_mld_max_msf = IPV6_MLD_MAX_MSF; | |
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 | |
218 | dev = dev_get_by_index(ifindex); | |
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 | ||
269 | if ((dev = dev_get_by_index(mc_lst->ifindex)) != NULL) { | |
270 | struct inet6_dev *idev = in6_dev_get(dev); | |
271 | ||
272 | if (idev) { | |
273 | (void) ip6_mc_leave_src(sk,mc_lst,idev); | |
274 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); | |
275 | in6_dev_put(idev); | |
276 | } | |
277 | dev_put(dev); | |
278 | } | |
279 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); | |
280 | return 0; | |
281 | } | |
282 | } | |
283 | write_unlock_bh(&ipv6_sk_mc_lock); | |
284 | ||
9951f036 | 285 | return -EADDRNOTAVAIL; |
1da177e4 LT |
286 | } |
287 | ||
288 | static struct inet6_dev *ip6_mc_find_dev(struct in6_addr *group, int ifindex) | |
289 | { | |
290 | struct net_device *dev = NULL; | |
291 | struct inet6_dev *idev = NULL; | |
292 | ||
293 | if (ifindex == 0) { | |
294 | struct rt6_info *rt; | |
295 | ||
296 | rt = rt6_lookup(group, NULL, 0, 0); | |
297 | if (rt) { | |
298 | dev = rt->rt6i_dev; | |
299 | dev_hold(dev); | |
300 | dst_release(&rt->u.dst); | |
301 | } | |
302 | } else | |
303 | dev = dev_get_by_index(ifindex); | |
304 | ||
305 | if (!dev) | |
306 | return NULL; | |
307 | idev = in6_dev_get(dev); | |
308 | if (!idev) { | |
309 | dev_put(dev); | |
310 | return NULL; | |
311 | } | |
312 | read_lock_bh(&idev->lock); | |
313 | if (idev->dead) { | |
314 | read_unlock_bh(&idev->lock); | |
315 | in6_dev_put(idev); | |
316 | dev_put(dev); | |
317 | return NULL; | |
318 | } | |
319 | return idev; | |
320 | } | |
321 | ||
322 | void ipv6_sock_mc_close(struct sock *sk) | |
323 | { | |
324 | struct ipv6_pinfo *np = inet6_sk(sk); | |
325 | struct ipv6_mc_socklist *mc_lst; | |
326 | ||
327 | write_lock_bh(&ipv6_sk_mc_lock); | |
328 | while ((mc_lst = np->ipv6_mc_list) != NULL) { | |
329 | struct net_device *dev; | |
330 | ||
331 | np->ipv6_mc_list = mc_lst->next; | |
332 | write_unlock_bh(&ipv6_sk_mc_lock); | |
333 | ||
334 | dev = dev_get_by_index(mc_lst->ifindex); | |
335 | if (dev) { | |
336 | struct inet6_dev *idev = in6_dev_get(dev); | |
337 | ||
338 | if (idev) { | |
339 | (void) ip6_mc_leave_src(sk, mc_lst, idev); | |
340 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); | |
341 | in6_dev_put(idev); | |
342 | } | |
343 | dev_put(dev); | |
344 | } | |
345 | ||
346 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); | |
347 | ||
348 | write_lock_bh(&ipv6_sk_mc_lock); | |
349 | } | |
350 | write_unlock_bh(&ipv6_sk_mc_lock); | |
351 | } | |
352 | ||
353 | int ip6_mc_source(int add, int omode, struct sock *sk, | |
354 | struct group_source_req *pgsr) | |
355 | { | |
356 | struct in6_addr *source, *group; | |
357 | struct ipv6_mc_socklist *pmc; | |
358 | struct net_device *dev; | |
359 | struct inet6_dev *idev; | |
360 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
361 | struct ip6_sf_socklist *psl; | |
362 | int i, j, rv; | |
c9e3e8b6 | 363 | int leavegroup = 0; |
5ab4a6c8 | 364 | int pmclocked = 0; |
1da177e4 LT |
365 | int err; |
366 | ||
367 | if (pgsr->gsr_group.ss_family != AF_INET6 || | |
368 | pgsr->gsr_source.ss_family != AF_INET6) | |
369 | return -EINVAL; | |
370 | ||
371 | source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr; | |
372 | group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr; | |
373 | ||
374 | if (!ipv6_addr_is_multicast(group)) | |
375 | return -EINVAL; | |
376 | ||
377 | idev = ip6_mc_find_dev(group, pgsr->gsr_interface); | |
378 | if (!idev) | |
379 | return -ENODEV; | |
380 | dev = idev->dev; | |
381 | ||
382 | err = -EADDRNOTAVAIL; | |
383 | ||
c9e3e8b6 | 384 | read_lock_bh(&ipv6_sk_mc_lock); |
1da177e4 LT |
385 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { |
386 | if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface) | |
387 | continue; | |
388 | if (ipv6_addr_equal(&pmc->addr, group)) | |
389 | break; | |
390 | } | |
917f2f10 DS |
391 | if (!pmc) { /* must have a prior join */ |
392 | err = -EINVAL; | |
1da177e4 | 393 | goto done; |
917f2f10 | 394 | } |
1da177e4 LT |
395 | /* if a source filter was set, must be the same mode as before */ |
396 | if (pmc->sflist) { | |
917f2f10 DS |
397 | if (pmc->sfmode != omode) { |
398 | err = -EINVAL; | |
1da177e4 | 399 | goto done; |
917f2f10 | 400 | } |
1da177e4 LT |
401 | } else if (pmc->sfmode != omode) { |
402 | /* allow mode switches for empty-set filters */ | |
403 | ip6_mc_add_src(idev, group, omode, 0, NULL, 0); | |
404 | ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
405 | pmc->sfmode = omode; | |
406 | } | |
407 | ||
5ab4a6c8 DS |
408 | write_lock_bh(&pmc->sflock); |
409 | pmclocked = 1; | |
410 | ||
1da177e4 LT |
411 | psl = pmc->sflist; |
412 | if (!add) { | |
413 | if (!psl) | |
917f2f10 | 414 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 LT |
415 | rv = !0; |
416 | for (i=0; i<psl->sl_count; i++) { | |
417 | rv = memcmp(&psl->sl_addr[i], source, | |
418 | sizeof(struct in6_addr)); | |
419 | if (rv == 0) | |
420 | break; | |
421 | } | |
422 | if (rv) /* source not found */ | |
917f2f10 | 423 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 424 | |
c9e3e8b6 DS |
425 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
426 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { | |
427 | leavegroup = 1; | |
428 | goto done; | |
429 | } | |
430 | ||
1da177e4 LT |
431 | /* update the interface filter */ |
432 | ip6_mc_del_src(idev, group, omode, 1, source, 1); | |
433 | ||
434 | for (j=i+1; j<psl->sl_count; j++) | |
435 | psl->sl_addr[j-1] = psl->sl_addr[j]; | |
436 | psl->sl_count--; | |
437 | err = 0; | |
438 | goto done; | |
439 | } | |
440 | /* else, add a new source to the filter */ | |
441 | ||
442 | if (psl && psl->sl_count >= sysctl_mld_max_msf) { | |
443 | err = -ENOBUFS; | |
444 | goto done; | |
445 | } | |
446 | if (!psl || psl->sl_count == psl->sl_max) { | |
447 | struct ip6_sf_socklist *newpsl; | |
448 | int count = IP6_SFBLOCK; | |
449 | ||
450 | if (psl) | |
451 | count += psl->sl_max; | |
452 | newpsl = (struct ip6_sf_socklist *)sock_kmalloc(sk, | |
453 | IP6_SFLSIZE(count), GFP_ATOMIC); | |
454 | if (!newpsl) { | |
455 | err = -ENOBUFS; | |
456 | goto done; | |
457 | } | |
458 | newpsl->sl_max = count; | |
459 | newpsl->sl_count = count - IP6_SFBLOCK; | |
460 | if (psl) { | |
461 | for (i=0; i<psl->sl_count; i++) | |
462 | newpsl->sl_addr[i] = psl->sl_addr[i]; | |
463 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
464 | } | |
465 | pmc->sflist = psl = newpsl; | |
466 | } | |
467 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ | |
468 | for (i=0; i<psl->sl_count; i++) { | |
469 | rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr)); | |
470 | if (rv == 0) | |
471 | break; | |
472 | } | |
473 | if (rv == 0) /* address already there is an error */ | |
474 | goto done; | |
475 | for (j=psl->sl_count-1; j>=i; j--) | |
476 | psl->sl_addr[j+1] = psl->sl_addr[j]; | |
477 | psl->sl_addr[i] = *source; | |
478 | psl->sl_count++; | |
479 | err = 0; | |
480 | /* update the interface list */ | |
481 | ip6_mc_add_src(idev, group, omode, 1, source, 1); | |
482 | done: | |
5ab4a6c8 DS |
483 | if (pmclocked) |
484 | write_unlock_bh(&pmc->sflock); | |
c9e3e8b6 | 485 | read_unlock_bh(&ipv6_sk_mc_lock); |
1da177e4 LT |
486 | read_unlock_bh(&idev->lock); |
487 | in6_dev_put(idev); | |
488 | dev_put(dev); | |
c9e3e8b6 DS |
489 | if (leavegroup) |
490 | return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group); | |
1da177e4 LT |
491 | return err; |
492 | } | |
493 | ||
494 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) | |
495 | { | |
496 | struct in6_addr *group; | |
497 | struct ipv6_mc_socklist *pmc; | |
498 | struct net_device *dev; | |
499 | struct inet6_dev *idev; | |
500 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
501 | struct ip6_sf_socklist *newpsl, *psl; | |
9951f036 | 502 | int leavegroup = 0; |
1da177e4 LT |
503 | int i, err; |
504 | ||
505 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
506 | ||
507 | if (!ipv6_addr_is_multicast(group)) | |
508 | return -EINVAL; | |
509 | if (gsf->gf_fmode != MCAST_INCLUDE && | |
510 | gsf->gf_fmode != MCAST_EXCLUDE) | |
511 | return -EINVAL; | |
512 | ||
513 | idev = ip6_mc_find_dev(group, gsf->gf_interface); | |
514 | ||
515 | if (!idev) | |
516 | return -ENODEV; | |
517 | dev = idev->dev; | |
1da177e4 | 518 | |
9c05989b | 519 | err = 0; |
5ab4a6c8 DS |
520 | read_lock_bh(&ipv6_sk_mc_lock); |
521 | ||
9951f036 DS |
522 | if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) { |
523 | leavegroup = 1; | |
524 | goto done; | |
525 | } | |
526 | ||
1da177e4 LT |
527 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { |
528 | if (pmc->ifindex != gsf->gf_interface) | |
529 | continue; | |
530 | if (ipv6_addr_equal(&pmc->addr, group)) | |
531 | break; | |
532 | } | |
917f2f10 DS |
533 | if (!pmc) { /* must have a prior join */ |
534 | err = -EINVAL; | |
1da177e4 | 535 | goto done; |
917f2f10 | 536 | } |
1da177e4 LT |
537 | if (gsf->gf_numsrc) { |
538 | newpsl = (struct ip6_sf_socklist *)sock_kmalloc(sk, | |
539 | IP6_SFLSIZE(gsf->gf_numsrc), GFP_ATOMIC); | |
540 | if (!newpsl) { | |
541 | err = -ENOBUFS; | |
542 | goto done; | |
543 | } | |
544 | newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc; | |
545 | for (i=0; i<newpsl->sl_count; ++i) { | |
546 | struct sockaddr_in6 *psin6; | |
547 | ||
548 | psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i]; | |
549 | newpsl->sl_addr[i] = psin6->sin6_addr; | |
550 | } | |
551 | err = ip6_mc_add_src(idev, group, gsf->gf_fmode, | |
552 | newpsl->sl_count, newpsl->sl_addr, 0); | |
553 | if (err) { | |
554 | sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); | |
555 | goto done; | |
556 | } | |
8713dbf0 | 557 | } else { |
1da177e4 | 558 | newpsl = NULL; |
8713dbf0 YZ |
559 | (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); |
560 | } | |
5ab4a6c8 DS |
561 | |
562 | write_lock_bh(&pmc->sflock); | |
1da177e4 LT |
563 | psl = pmc->sflist; |
564 | if (psl) { | |
565 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, | |
566 | psl->sl_count, psl->sl_addr, 0); | |
567 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
568 | } else | |
569 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
570 | pmc->sflist = newpsl; | |
571 | pmc->sfmode = gsf->gf_fmode; | |
5ab4a6c8 | 572 | write_unlock_bh(&pmc->sflock); |
917f2f10 | 573 | err = 0; |
1da177e4 | 574 | done: |
5ab4a6c8 | 575 | read_unlock_bh(&ipv6_sk_mc_lock); |
1da177e4 LT |
576 | read_unlock_bh(&idev->lock); |
577 | in6_dev_put(idev); | |
578 | dev_put(dev); | |
9951f036 DS |
579 | if (leavegroup) |
580 | err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group); | |
1da177e4 LT |
581 | return err; |
582 | } | |
583 | ||
584 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
585 | struct group_filter __user *optval, int __user *optlen) | |
586 | { | |
587 | int err, i, count, copycount; | |
588 | struct in6_addr *group; | |
589 | struct ipv6_mc_socklist *pmc; | |
590 | struct inet6_dev *idev; | |
591 | struct net_device *dev; | |
592 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
593 | struct ip6_sf_socklist *psl; | |
594 | ||
595 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
596 | ||
597 | if (!ipv6_addr_is_multicast(group)) | |
598 | return -EINVAL; | |
599 | ||
600 | idev = ip6_mc_find_dev(group, gsf->gf_interface); | |
601 | ||
602 | if (!idev) | |
603 | return -ENODEV; | |
604 | ||
605 | dev = idev->dev; | |
606 | ||
607 | err = -EADDRNOTAVAIL; | |
5ab4a6c8 DS |
608 | /* |
609 | * changes to the ipv6_mc_list require the socket lock and | |
610 | * a read lock on ip6_sk_mc_lock. We have the socket lock, | |
611 | * so reading the list is safe. | |
612 | */ | |
1da177e4 LT |
613 | |
614 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { | |
615 | if (pmc->ifindex != gsf->gf_interface) | |
616 | continue; | |
617 | if (ipv6_addr_equal(group, &pmc->addr)) | |
618 | break; | |
619 | } | |
620 | if (!pmc) /* must have a prior join */ | |
621 | goto done; | |
622 | gsf->gf_fmode = pmc->sfmode; | |
623 | psl = pmc->sflist; | |
624 | count = psl ? psl->sl_count : 0; | |
625 | read_unlock_bh(&idev->lock); | |
626 | in6_dev_put(idev); | |
627 | dev_put(dev); | |
628 | ||
629 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; | |
630 | gsf->gf_numsrc = count; | |
631 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || | |
632 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { | |
633 | return -EFAULT; | |
634 | } | |
5ab4a6c8 DS |
635 | /* changes to psl require the socket lock, a read lock on |
636 | * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We | |
637 | * have the socket lock, so reading here is safe. | |
638 | */ | |
1da177e4 LT |
639 | for (i=0; i<copycount; i++) { |
640 | struct sockaddr_in6 *psin6; | |
641 | struct sockaddr_storage ss; | |
642 | ||
643 | psin6 = (struct sockaddr_in6 *)&ss; | |
644 | memset(&ss, 0, sizeof(ss)); | |
645 | psin6->sin6_family = AF_INET6; | |
646 | psin6->sin6_addr = psl->sl_addr[i]; | |
647 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) | |
648 | return -EFAULT; | |
649 | } | |
650 | return 0; | |
651 | done: | |
652 | read_unlock_bh(&idev->lock); | |
653 | in6_dev_put(idev); | |
654 | dev_put(dev); | |
655 | return err; | |
656 | } | |
657 | ||
658 | int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr, | |
659 | struct in6_addr *src_addr) | |
660 | { | |
661 | struct ipv6_pinfo *np = inet6_sk(sk); | |
662 | struct ipv6_mc_socklist *mc; | |
663 | struct ip6_sf_socklist *psl; | |
664 | int rv = 1; | |
665 | ||
666 | read_lock(&ipv6_sk_mc_lock); | |
667 | for (mc = np->ipv6_mc_list; mc; mc = mc->next) { | |
668 | if (ipv6_addr_equal(&mc->addr, mc_addr)) | |
669 | break; | |
670 | } | |
671 | if (!mc) { | |
672 | read_unlock(&ipv6_sk_mc_lock); | |
673 | return 1; | |
674 | } | |
5ab4a6c8 | 675 | read_lock(&mc->sflock); |
1da177e4 LT |
676 | psl = mc->sflist; |
677 | if (!psl) { | |
678 | rv = mc->sfmode == MCAST_EXCLUDE; | |
679 | } else { | |
680 | int i; | |
681 | ||
682 | for (i=0; i<psl->sl_count; i++) { | |
683 | if (ipv6_addr_equal(&psl->sl_addr[i], src_addr)) | |
684 | break; | |
685 | } | |
686 | if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) | |
687 | rv = 0; | |
688 | if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) | |
689 | rv = 0; | |
690 | } | |
5ab4a6c8 | 691 | read_unlock(&mc->sflock); |
1da177e4 LT |
692 | read_unlock(&ipv6_sk_mc_lock); |
693 | ||
694 | return rv; | |
695 | } | |
696 | ||
697 | static void ma_put(struct ifmcaddr6 *mc) | |
698 | { | |
699 | if (atomic_dec_and_test(&mc->mca_refcnt)) { | |
700 | in6_dev_put(mc->idev); | |
701 | kfree(mc); | |
702 | } | |
703 | } | |
704 | ||
705 | static void igmp6_group_added(struct ifmcaddr6 *mc) | |
706 | { | |
707 | struct net_device *dev = mc->idev->dev; | |
708 | char buf[MAX_ADDR_LEN]; | |
709 | ||
710 | spin_lock_bh(&mc->mca_lock); | |
711 | if (!(mc->mca_flags&MAF_LOADED)) { | |
712 | mc->mca_flags |= MAF_LOADED; | |
713 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
714 | dev_mc_add(dev, buf, dev->addr_len, 0); | |
715 | } | |
716 | spin_unlock_bh(&mc->mca_lock); | |
717 | ||
718 | if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT)) | |
719 | return; | |
720 | ||
721 | if (MLD_V1_SEEN(mc->idev)) { | |
722 | igmp6_join_group(mc); | |
723 | return; | |
724 | } | |
725 | /* else v2 */ | |
726 | ||
727 | mc->mca_crcount = mc->idev->mc_qrv; | |
728 | mld_ifc_event(mc->idev); | |
729 | } | |
730 | ||
731 | static void igmp6_group_dropped(struct ifmcaddr6 *mc) | |
732 | { | |
733 | struct net_device *dev = mc->idev->dev; | |
734 | char buf[MAX_ADDR_LEN]; | |
735 | ||
736 | spin_lock_bh(&mc->mca_lock); | |
737 | if (mc->mca_flags&MAF_LOADED) { | |
738 | mc->mca_flags &= ~MAF_LOADED; | |
739 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
740 | dev_mc_delete(dev, buf, dev->addr_len, 0); | |
741 | } | |
742 | ||
743 | if (mc->mca_flags & MAF_NOREPORT) | |
744 | goto done; | |
745 | spin_unlock_bh(&mc->mca_lock); | |
746 | ||
747 | if (!mc->idev->dead) | |
748 | igmp6_leave_group(mc); | |
749 | ||
750 | spin_lock_bh(&mc->mca_lock); | |
751 | if (del_timer(&mc->mca_timer)) | |
752 | atomic_dec(&mc->mca_refcnt); | |
753 | done: | |
754 | ip6_mc_clear_src(mc); | |
755 | spin_unlock_bh(&mc->mca_lock); | |
756 | } | |
757 | ||
758 | /* | |
759 | * deleted ifmcaddr6 manipulation | |
760 | */ | |
761 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) | |
762 | { | |
763 | struct ifmcaddr6 *pmc; | |
764 | ||
765 | /* this is an "ifmcaddr6" for convenience; only the fields below | |
766 | * are actually used. In particular, the refcnt and users are not | |
767 | * used for management of the delete list. Using the same structure | |
768 | * for deleted items allows change reports to use common code with | |
769 | * non-deleted or query-response MCA's. | |
770 | */ | |
771 | pmc = (struct ifmcaddr6 *)kmalloc(sizeof(*pmc), GFP_ATOMIC); | |
772 | if (!pmc) | |
773 | return; | |
774 | memset(pmc, 0, sizeof(*pmc)); | |
775 | spin_lock_bh(&im->mca_lock); | |
776 | spin_lock_init(&pmc->mca_lock); | |
777 | pmc->idev = im->idev; | |
778 | in6_dev_hold(idev); | |
779 | pmc->mca_addr = im->mca_addr; | |
780 | pmc->mca_crcount = idev->mc_qrv; | |
781 | pmc->mca_sfmode = im->mca_sfmode; | |
782 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
783 | struct ip6_sf_list *psf; | |
784 | ||
785 | pmc->mca_tomb = im->mca_tomb; | |
786 | pmc->mca_sources = im->mca_sources; | |
787 | im->mca_tomb = im->mca_sources = NULL; | |
788 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) | |
789 | psf->sf_crcount = pmc->mca_crcount; | |
790 | } | |
791 | spin_unlock_bh(&im->mca_lock); | |
792 | ||
793 | write_lock_bh(&idev->mc_lock); | |
794 | pmc->next = idev->mc_tomb; | |
795 | idev->mc_tomb = pmc; | |
796 | write_unlock_bh(&idev->mc_lock); | |
797 | } | |
798 | ||
799 | static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca) | |
800 | { | |
801 | struct ifmcaddr6 *pmc, *pmc_prev; | |
802 | struct ip6_sf_list *psf, *psf_next; | |
803 | ||
804 | write_lock_bh(&idev->mc_lock); | |
805 | pmc_prev = NULL; | |
806 | for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) { | |
807 | if (ipv6_addr_equal(&pmc->mca_addr, pmca)) | |
808 | break; | |
809 | pmc_prev = pmc; | |
810 | } | |
811 | if (pmc) { | |
812 | if (pmc_prev) | |
813 | pmc_prev->next = pmc->next; | |
814 | else | |
815 | idev->mc_tomb = pmc->next; | |
816 | } | |
817 | write_unlock_bh(&idev->mc_lock); | |
818 | if (pmc) { | |
819 | for (psf=pmc->mca_tomb; psf; psf=psf_next) { | |
820 | psf_next = psf->sf_next; | |
821 | kfree(psf); | |
822 | } | |
823 | in6_dev_put(pmc->idev); | |
824 | kfree(pmc); | |
825 | } | |
826 | } | |
827 | ||
828 | static void mld_clear_delrec(struct inet6_dev *idev) | |
829 | { | |
830 | struct ifmcaddr6 *pmc, *nextpmc; | |
831 | ||
832 | write_lock_bh(&idev->mc_lock); | |
833 | pmc = idev->mc_tomb; | |
834 | idev->mc_tomb = NULL; | |
835 | write_unlock_bh(&idev->mc_lock); | |
836 | ||
837 | for (; pmc; pmc = nextpmc) { | |
838 | nextpmc = pmc->next; | |
839 | ip6_mc_clear_src(pmc); | |
840 | in6_dev_put(pmc->idev); | |
841 | kfree(pmc); | |
842 | } | |
843 | ||
844 | /* clear dead sources, too */ | |
845 | read_lock_bh(&idev->lock); | |
846 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
847 | struct ip6_sf_list *psf, *psf_next; | |
848 | ||
849 | spin_lock_bh(&pmc->mca_lock); | |
850 | psf = pmc->mca_tomb; | |
851 | pmc->mca_tomb = NULL; | |
852 | spin_unlock_bh(&pmc->mca_lock); | |
853 | for (; psf; psf=psf_next) { | |
854 | psf_next = psf->sf_next; | |
855 | kfree(psf); | |
856 | } | |
857 | } | |
858 | read_unlock_bh(&idev->lock); | |
859 | } | |
860 | ||
861 | ||
862 | /* | |
863 | * device multicast group inc (add if not found) | |
864 | */ | |
865 | int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr) | |
866 | { | |
867 | struct ifmcaddr6 *mc; | |
868 | struct inet6_dev *idev; | |
869 | ||
870 | idev = in6_dev_get(dev); | |
871 | ||
872 | if (idev == NULL) | |
873 | return -EINVAL; | |
874 | ||
875 | write_lock_bh(&idev->lock); | |
876 | if (idev->dead) { | |
877 | write_unlock_bh(&idev->lock); | |
878 | in6_dev_put(idev); | |
879 | return -ENODEV; | |
880 | } | |
881 | ||
882 | for (mc = idev->mc_list; mc; mc = mc->next) { | |
883 | if (ipv6_addr_equal(&mc->mca_addr, addr)) { | |
884 | mc->mca_users++; | |
885 | write_unlock_bh(&idev->lock); | |
886 | ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0, | |
887 | NULL, 0); | |
888 | in6_dev_put(idev); | |
889 | return 0; | |
890 | } | |
891 | } | |
892 | ||
893 | /* | |
894 | * not found: create a new one. | |
895 | */ | |
896 | ||
897 | mc = kmalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC); | |
898 | ||
899 | if (mc == NULL) { | |
900 | write_unlock_bh(&idev->lock); | |
901 | in6_dev_put(idev); | |
902 | return -ENOMEM; | |
903 | } | |
904 | ||
905 | memset(mc, 0, sizeof(struct ifmcaddr6)); | |
906 | init_timer(&mc->mca_timer); | |
907 | mc->mca_timer.function = igmp6_timer_handler; | |
908 | mc->mca_timer.data = (unsigned long) mc; | |
909 | ||
910 | ipv6_addr_copy(&mc->mca_addr, addr); | |
911 | mc->idev = idev; | |
912 | mc->mca_users = 1; | |
913 | /* mca_stamp should be updated upon changes */ | |
914 | mc->mca_cstamp = mc->mca_tstamp = jiffies; | |
915 | atomic_set(&mc->mca_refcnt, 2); | |
916 | spin_lock_init(&mc->mca_lock); | |
917 | ||
918 | /* initial mode is (EX, empty) */ | |
919 | mc->mca_sfmode = MCAST_EXCLUDE; | |
920 | mc->mca_sfcount[MCAST_EXCLUDE] = 1; | |
921 | ||
922 | if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) || | |
923 | IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
924 | mc->mca_flags |= MAF_NOREPORT; | |
925 | ||
926 | mc->next = idev->mc_list; | |
927 | idev->mc_list = mc; | |
928 | write_unlock_bh(&idev->lock); | |
929 | ||
930 | mld_del_delrec(idev, &mc->mca_addr); | |
931 | igmp6_group_added(mc); | |
932 | ma_put(mc); | |
933 | return 0; | |
934 | } | |
935 | ||
936 | /* | |
937 | * device multicast group del | |
938 | */ | |
939 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr) | |
940 | { | |
941 | struct ifmcaddr6 *ma, **map; | |
942 | ||
943 | write_lock_bh(&idev->lock); | |
944 | for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) { | |
945 | if (ipv6_addr_equal(&ma->mca_addr, addr)) { | |
946 | if (--ma->mca_users == 0) { | |
947 | *map = ma->next; | |
948 | write_unlock_bh(&idev->lock); | |
949 | ||
950 | igmp6_group_dropped(ma); | |
951 | ||
952 | ma_put(ma); | |
953 | return 0; | |
954 | } | |
955 | write_unlock_bh(&idev->lock); | |
956 | return 0; | |
957 | } | |
958 | } | |
959 | write_unlock_bh(&idev->lock); | |
960 | ||
961 | return -ENOENT; | |
962 | } | |
963 | ||
964 | int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr) | |
965 | { | |
966 | struct inet6_dev *idev = in6_dev_get(dev); | |
967 | int err; | |
968 | ||
969 | if (!idev) | |
970 | return -ENODEV; | |
971 | ||
972 | err = __ipv6_dev_mc_dec(idev, addr); | |
973 | ||
974 | in6_dev_put(idev); | |
975 | ||
976 | return err; | |
977 | } | |
978 | ||
979 | /* | |
980 | * identify MLD packets for MLD filter exceptions | |
981 | */ | |
982 | int ipv6_is_mld(struct sk_buff *skb, int nexthdr) | |
983 | { | |
984 | struct icmp6hdr *pic; | |
985 | ||
986 | if (nexthdr != IPPROTO_ICMPV6) | |
987 | return 0; | |
988 | ||
989 | if (!pskb_may_pull(skb, sizeof(struct icmp6hdr))) | |
990 | return 0; | |
991 | ||
992 | pic = (struct icmp6hdr *)skb->h.raw; | |
993 | ||
994 | switch (pic->icmp6_type) { | |
995 | case ICMPV6_MGM_QUERY: | |
996 | case ICMPV6_MGM_REPORT: | |
997 | case ICMPV6_MGM_REDUCTION: | |
998 | case ICMPV6_MLD2_REPORT: | |
999 | return 1; | |
1000 | default: | |
1001 | break; | |
1002 | } | |
1003 | return 0; | |
1004 | } | |
1005 | ||
1006 | /* | |
1007 | * check if the interface/address pair is valid | |
1008 | */ | |
1009 | int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group, | |
1010 | struct in6_addr *src_addr) | |
1011 | { | |
1012 | struct inet6_dev *idev; | |
1013 | struct ifmcaddr6 *mc; | |
1014 | int rv = 0; | |
1015 | ||
1016 | idev = in6_dev_get(dev); | |
1017 | if (idev) { | |
1018 | read_lock_bh(&idev->lock); | |
1019 | for (mc = idev->mc_list; mc; mc=mc->next) { | |
1020 | if (ipv6_addr_equal(&mc->mca_addr, group)) | |
1021 | break; | |
1022 | } | |
1023 | if (mc) { | |
1024 | if (src_addr && !ipv6_addr_any(src_addr)) { | |
1025 | struct ip6_sf_list *psf; | |
1026 | ||
1027 | spin_lock_bh(&mc->mca_lock); | |
1028 | for (psf=mc->mca_sources;psf;psf=psf->sf_next) { | |
1029 | if (ipv6_addr_equal(&psf->sf_addr, src_addr)) | |
1030 | break; | |
1031 | } | |
1032 | if (psf) | |
1033 | rv = psf->sf_count[MCAST_INCLUDE] || | |
1034 | psf->sf_count[MCAST_EXCLUDE] != | |
1035 | mc->mca_sfcount[MCAST_EXCLUDE]; | |
1036 | else | |
1037 | rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0; | |
1038 | spin_unlock_bh(&mc->mca_lock); | |
1039 | } else | |
1040 | rv = 1; /* don't filter unspecified source */ | |
1041 | } | |
1042 | read_unlock_bh(&idev->lock); | |
1043 | in6_dev_put(idev); | |
1044 | } | |
1045 | return rv; | |
1046 | } | |
1047 | ||
1048 | static void mld_gq_start_timer(struct inet6_dev *idev) | |
1049 | { | |
1050 | int tv = net_random() % idev->mc_maxdelay; | |
1051 | ||
1052 | idev->mc_gq_running = 1; | |
1053 | if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2)) | |
1054 | in6_dev_hold(idev); | |
1055 | } | |
1056 | ||
1057 | static void mld_ifc_start_timer(struct inet6_dev *idev, int delay) | |
1058 | { | |
1059 | int tv = net_random() % delay; | |
1060 | ||
1061 | if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2)) | |
1062 | in6_dev_hold(idev); | |
1063 | } | |
1064 | ||
1065 | /* | |
1066 | * IGMP handling (alias multicast ICMPv6 messages) | |
1067 | */ | |
1068 | ||
1069 | static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) | |
1070 | { | |
1071 | unsigned long delay = resptime; | |
1072 | ||
1073 | /* Do not start timer for these addresses */ | |
1074 | if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) || | |
1075 | IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
1076 | return; | |
1077 | ||
1078 | if (del_timer(&ma->mca_timer)) { | |
1079 | atomic_dec(&ma->mca_refcnt); | |
1080 | delay = ma->mca_timer.expires - jiffies; | |
1081 | } | |
1082 | ||
1083 | if (delay >= resptime) { | |
1084 | if (resptime) | |
1085 | delay = net_random() % resptime; | |
1086 | else | |
1087 | delay = 1; | |
1088 | } | |
1089 | ma->mca_timer.expires = jiffies + delay; | |
1090 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
1091 | atomic_inc(&ma->mca_refcnt); | |
1092 | ma->mca_flags |= MAF_TIMER_RUNNING; | |
1093 | } | |
1094 | ||
5ab4a6c8 DS |
1095 | /* mark EXCLUDE-mode sources */ |
1096 | static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs, | |
1da177e4 LT |
1097 | struct in6_addr *srcs) |
1098 | { | |
1099 | struct ip6_sf_list *psf; | |
1100 | int i, scount; | |
1101 | ||
1102 | scount = 0; | |
1103 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1104 | if (scount == nsrcs) | |
1105 | break; | |
5ab4a6c8 DS |
1106 | for (i=0; i<nsrcs; i++) { |
1107 | /* skip inactive filters */ | |
1108 | if (pmc->mca_sfcount[MCAST_INCLUDE] || | |
1109 | pmc->mca_sfcount[MCAST_EXCLUDE] != | |
1110 | psf->sf_count[MCAST_EXCLUDE]) | |
1111 | continue; | |
1112 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { | |
1113 | scount++; | |
1114 | break; | |
1115 | } | |
1116 | } | |
1117 | } | |
1118 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1119 | if (scount == nsrcs) /* all sources excluded */ | |
1120 | return 0; | |
1121 | return 1; | |
1122 | } | |
1123 | ||
1124 | static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs, | |
1125 | struct in6_addr *srcs) | |
1126 | { | |
1127 | struct ip6_sf_list *psf; | |
1128 | int i, scount; | |
1129 | ||
1130 | if (pmc->mca_sfmode == MCAST_EXCLUDE) | |
1131 | return mld_xmarksources(pmc, nsrcs, srcs); | |
1132 | ||
1133 | /* mark INCLUDE-mode sources */ | |
1134 | ||
1135 | scount = 0; | |
1136 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1137 | if (scount == nsrcs) | |
1138 | break; | |
1139 | for (i=0; i<nsrcs; i++) { | |
1da177e4 LT |
1140 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1141 | psf->sf_gsresp = 1; | |
1142 | scount++; | |
1143 | break; | |
1144 | } | |
5ab4a6c8 DS |
1145 | } |
1146 | } | |
1147 | if (!scount) { | |
1148 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1149 | return 0; | |
1da177e4 | 1150 | } |
5ab4a6c8 DS |
1151 | pmc->mca_flags |= MAF_GSQUERY; |
1152 | return 1; | |
1da177e4 LT |
1153 | } |
1154 | ||
1155 | int igmp6_event_query(struct sk_buff *skb) | |
1156 | { | |
97300b5f | 1157 | struct mld2_query *mlh2 = NULL; |
1da177e4 LT |
1158 | struct ifmcaddr6 *ma; |
1159 | struct in6_addr *group; | |
1160 | unsigned long max_delay; | |
1161 | struct inet6_dev *idev; | |
1162 | struct icmp6hdr *hdr; | |
1163 | int group_type; | |
1164 | int mark = 0; | |
1165 | int len; | |
1166 | ||
1167 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) | |
1168 | return -EINVAL; | |
1169 | ||
1170 | /* compute payload length excluding extension headers */ | |
1171 | len = ntohs(skb->nh.ipv6h->payload_len) + sizeof(struct ipv6hdr); | |
1172 | len -= (char *)skb->h.raw - (char *)skb->nh.ipv6h; | |
1173 | ||
1174 | /* Drop queries with not link local source */ | |
1175 | if (!(ipv6_addr_type(&skb->nh.ipv6h->saddr)&IPV6_ADDR_LINKLOCAL)) | |
1176 | return -EINVAL; | |
1177 | ||
1178 | idev = in6_dev_get(skb->dev); | |
1179 | ||
1180 | if (idev == NULL) | |
1181 | return 0; | |
1182 | ||
1183 | hdr = (struct icmp6hdr *) skb->h.raw; | |
1184 | group = (struct in6_addr *) (hdr + 1); | |
1185 | group_type = ipv6_addr_type(group); | |
1186 | ||
1187 | if (group_type != IPV6_ADDR_ANY && | |
1188 | !(group_type&IPV6_ADDR_MULTICAST)) { | |
1189 | in6_dev_put(idev); | |
1190 | return -EINVAL; | |
1191 | } | |
1192 | ||
1193 | if (len == 24) { | |
1194 | int switchback; | |
1195 | /* MLDv1 router present */ | |
1196 | ||
1197 | /* Translate milliseconds to jiffies */ | |
1198 | max_delay = (ntohs(hdr->icmp6_maxdelay)*HZ)/1000; | |
1199 | ||
1200 | switchback = (idev->mc_qrv + 1) * max_delay; | |
1201 | idev->mc_v1_seen = jiffies + switchback; | |
1202 | ||
1203 | /* cancel the interface change timer */ | |
1204 | idev->mc_ifc_count = 0; | |
1205 | if (del_timer(&idev->mc_ifc_timer)) | |
1206 | __in6_dev_put(idev); | |
1207 | /* clear deleted report items */ | |
1208 | mld_clear_delrec(idev); | |
1209 | } else if (len >= 28) { | |
97300b5f YZ |
1210 | int srcs_offset = sizeof(struct mld2_query) - |
1211 | sizeof(struct icmp6hdr); | |
1212 | if (!pskb_may_pull(skb, srcs_offset)) { | |
1213 | in6_dev_put(idev); | |
1214 | return -EINVAL; | |
1215 | } | |
1216 | mlh2 = (struct mld2_query *) skb->h.raw; | |
1da177e4 LT |
1217 | max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000; |
1218 | if (!max_delay) | |
1219 | max_delay = 1; | |
1220 | idev->mc_maxdelay = max_delay; | |
1221 | if (mlh2->qrv) | |
1222 | idev->mc_qrv = mlh2->qrv; | |
1223 | if (group_type == IPV6_ADDR_ANY) { /* general query */ | |
1224 | if (mlh2->nsrcs) { | |
1225 | in6_dev_put(idev); | |
1226 | return -EINVAL; /* no sources allowed */ | |
1227 | } | |
1228 | mld_gq_start_timer(idev); | |
1229 | in6_dev_put(idev); | |
1230 | return 0; | |
1231 | } | |
1232 | /* mark sources to include, if group & source-specific */ | |
97300b5f YZ |
1233 | if (mlh2->nsrcs != 0) { |
1234 | if (!pskb_may_pull(skb, srcs_offset + | |
5ab4a6c8 | 1235 | ntohs(mlh2->nsrcs) * sizeof(struct in6_addr))) { |
97300b5f YZ |
1236 | in6_dev_put(idev); |
1237 | return -EINVAL; | |
1238 | } | |
1239 | mlh2 = (struct mld2_query *) skb->h.raw; | |
1240 | mark = 1; | |
1241 | } | |
1da177e4 LT |
1242 | } else { |
1243 | in6_dev_put(idev); | |
1244 | return -EINVAL; | |
1245 | } | |
1246 | ||
1247 | read_lock_bh(&idev->lock); | |
1248 | if (group_type == IPV6_ADDR_ANY) { | |
1249 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
1250 | spin_lock_bh(&ma->mca_lock); | |
1251 | igmp6_group_queried(ma, max_delay); | |
1252 | spin_unlock_bh(&ma->mca_lock); | |
1253 | } | |
1254 | } else { | |
1255 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
1256 | if (group_type != IPV6_ADDR_ANY && | |
1257 | !ipv6_addr_equal(group, &ma->mca_addr)) | |
1258 | continue; | |
1259 | spin_lock_bh(&ma->mca_lock); | |
1260 | if (ma->mca_flags & MAF_TIMER_RUNNING) { | |
1261 | /* gsquery <- gsquery && mark */ | |
1262 | if (!mark) | |
1263 | ma->mca_flags &= ~MAF_GSQUERY; | |
1264 | } else { | |
1265 | /* gsquery <- mark */ | |
1266 | if (mark) | |
1267 | ma->mca_flags |= MAF_GSQUERY; | |
1268 | else | |
1269 | ma->mca_flags &= ~MAF_GSQUERY; | |
1270 | } | |
5ab4a6c8 DS |
1271 | if (!(ma->mca_flags & MAF_GSQUERY) || |
1272 | mld_marksources(ma, ntohs(mlh2->nsrcs), mlh2->srcs)) | |
1273 | igmp6_group_queried(ma, max_delay); | |
1da177e4 LT |
1274 | spin_unlock_bh(&ma->mca_lock); |
1275 | if (group_type != IPV6_ADDR_ANY) | |
1276 | break; | |
1277 | } | |
1278 | } | |
1279 | read_unlock_bh(&idev->lock); | |
1280 | in6_dev_put(idev); | |
1281 | ||
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | ||
1286 | int igmp6_event_report(struct sk_buff *skb) | |
1287 | { | |
1288 | struct ifmcaddr6 *ma; | |
1289 | struct in6_addr *addrp; | |
1290 | struct inet6_dev *idev; | |
1291 | struct icmp6hdr *hdr; | |
1292 | int addr_type; | |
1293 | ||
1294 | /* Our own report looped back. Ignore it. */ | |
1295 | if (skb->pkt_type == PACKET_LOOPBACK) | |
1296 | return 0; | |
1297 | ||
24c69275 DS |
1298 | /* send our report if the MC router may not have heard this report */ |
1299 | if (skb->pkt_type != PACKET_MULTICAST && | |
1300 | skb->pkt_type != PACKET_BROADCAST) | |
1301 | return 0; | |
1302 | ||
1da177e4 LT |
1303 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) |
1304 | return -EINVAL; | |
1305 | ||
1306 | hdr = (struct icmp6hdr*) skb->h.raw; | |
1307 | ||
1308 | /* Drop reports with not link local source */ | |
1309 | addr_type = ipv6_addr_type(&skb->nh.ipv6h->saddr); | |
1310 | if (addr_type != IPV6_ADDR_ANY && | |
1311 | !(addr_type&IPV6_ADDR_LINKLOCAL)) | |
1312 | return -EINVAL; | |
1313 | ||
1314 | addrp = (struct in6_addr *) (hdr + 1); | |
1315 | ||
1316 | idev = in6_dev_get(skb->dev); | |
1317 | if (idev == NULL) | |
1318 | return -ENODEV; | |
1319 | ||
1320 | /* | |
1321 | * Cancel the timer for this group | |
1322 | */ | |
1323 | ||
1324 | read_lock_bh(&idev->lock); | |
1325 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
1326 | if (ipv6_addr_equal(&ma->mca_addr, addrp)) { | |
1327 | spin_lock(&ma->mca_lock); | |
1328 | if (del_timer(&ma->mca_timer)) | |
1329 | atomic_dec(&ma->mca_refcnt); | |
1330 | ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING); | |
1331 | spin_unlock(&ma->mca_lock); | |
1332 | break; | |
1333 | } | |
1334 | } | |
1335 | read_unlock_bh(&idev->lock); | |
1336 | in6_dev_put(idev); | |
1337 | return 0; | |
1338 | } | |
1339 | ||
1340 | static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type, | |
1341 | int gdeleted, int sdeleted) | |
1342 | { | |
1343 | switch (type) { | |
1344 | case MLD2_MODE_IS_INCLUDE: | |
1345 | case MLD2_MODE_IS_EXCLUDE: | |
1346 | if (gdeleted || sdeleted) | |
1347 | return 0; | |
5ab4a6c8 DS |
1348 | if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) { |
1349 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1350 | return 1; | |
1351 | /* don't include if this source is excluded | |
1352 | * in all filters | |
1353 | */ | |
1354 | if (psf->sf_count[MCAST_INCLUDE]) | |
1355 | return 0; | |
1356 | return pmc->mca_sfcount[MCAST_EXCLUDE] == | |
1357 | psf->sf_count[MCAST_EXCLUDE]; | |
1358 | } | |
1359 | return 0; | |
1da177e4 LT |
1360 | case MLD2_CHANGE_TO_INCLUDE: |
1361 | if (gdeleted || sdeleted) | |
1362 | return 0; | |
1363 | return psf->sf_count[MCAST_INCLUDE] != 0; | |
1364 | case MLD2_CHANGE_TO_EXCLUDE: | |
1365 | if (gdeleted || sdeleted) | |
1366 | return 0; | |
1367 | if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 || | |
1368 | psf->sf_count[MCAST_INCLUDE]) | |
1369 | return 0; | |
1370 | return pmc->mca_sfcount[MCAST_EXCLUDE] == | |
1371 | psf->sf_count[MCAST_EXCLUDE]; | |
1372 | case MLD2_ALLOW_NEW_SOURCES: | |
1373 | if (gdeleted || !psf->sf_crcount) | |
1374 | return 0; | |
1375 | return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted; | |
1376 | case MLD2_BLOCK_OLD_SOURCES: | |
1377 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1378 | return gdeleted || (psf->sf_crcount && sdeleted); | |
1379 | return psf->sf_crcount && !gdeleted && !sdeleted; | |
1380 | } | |
1381 | return 0; | |
1382 | } | |
1383 | ||
1384 | static int | |
1385 | mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted) | |
1386 | { | |
1387 | struct ip6_sf_list *psf; | |
1388 | int scount = 0; | |
1389 | ||
1390 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1391 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) | |
1392 | continue; | |
1393 | scount++; | |
1394 | } | |
1395 | return scount; | |
1396 | } | |
1397 | ||
1398 | static struct sk_buff *mld_newpack(struct net_device *dev, int size) | |
1399 | { | |
1400 | struct sock *sk = igmp6_socket->sk; | |
1401 | struct sk_buff *skb; | |
1402 | struct mld2_report *pmr; | |
1403 | struct in6_addr addr_buf; | |
1404 | int err; | |
1405 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1406 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1407 | IPV6_TLV_PADN, 0 }; | |
1408 | ||
1409 | /* we assume size > sizeof(ra) here */ | |
1410 | skb = sock_alloc_send_skb(sk, size + LL_RESERVED_SPACE(dev), 1, &err); | |
1411 | ||
1412 | if (skb == 0) | |
1413 | return NULL; | |
1414 | ||
1415 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
1da177e4 LT |
1416 | |
1417 | if (ipv6_get_lladdr(dev, &addr_buf)) { | |
1418 | /* <draft-ietf-magma-mld-source-05.txt>: | |
1419 | * use unspecified address as the source address | |
1420 | * when a valid link-local address is not available. | |
1421 | */ | |
1422 | memset(&addr_buf, 0, sizeof(addr_buf)); | |
1423 | } | |
1424 | ||
1425 | ip6_nd_hdr(sk, skb, dev, &addr_buf, &mld2_all_mcr, NEXTHDR_HOP, 0); | |
1426 | ||
1427 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1428 | ||
1429 | pmr =(struct mld2_report *)skb_put(skb, sizeof(*pmr)); | |
1430 | skb->h.raw = (unsigned char *)pmr; | |
1431 | pmr->type = ICMPV6_MLD2_REPORT; | |
1432 | pmr->resv1 = 0; | |
1433 | pmr->csum = 0; | |
1434 | pmr->resv2 = 0; | |
1435 | pmr->ngrec = 0; | |
1436 | return skb; | |
1437 | } | |
1438 | ||
e9823185 PM |
1439 | static inline int mld_dev_queue_xmit2(struct sk_buff *skb) |
1440 | { | |
1441 | struct net_device *dev = skb->dev; | |
1442 | ||
1443 | if (dev->hard_header) { | |
1444 | unsigned char ha[MAX_ADDR_LEN]; | |
1445 | int err; | |
1446 | ||
1447 | ndisc_mc_map(&skb->nh.ipv6h->daddr, ha, dev, 1); | |
1448 | err = dev->hard_header(skb, dev, ETH_P_IPV6, ha, NULL, skb->len); | |
1449 | if (err < 0) { | |
1450 | kfree_skb(skb); | |
1451 | return err; | |
1452 | } | |
1453 | } | |
1454 | return dev_queue_xmit(skb); | |
1455 | } | |
1456 | ||
1457 | static inline int mld_dev_queue_xmit(struct sk_buff *skb) | |
1458 | { | |
1459 | return NF_HOOK(PF_INET6, NF_IP6_POST_ROUTING, skb, NULL, skb->dev, | |
1460 | mld_dev_queue_xmit2); | |
1461 | } | |
1462 | ||
1da177e4 LT |
1463 | static void mld_sendpack(struct sk_buff *skb) |
1464 | { | |
1465 | struct ipv6hdr *pip6 = skb->nh.ipv6h; | |
1466 | struct mld2_report *pmr = (struct mld2_report *)skb->h.raw; | |
1467 | int payload_len, mldlen; | |
1468 | struct inet6_dev *idev = in6_dev_get(skb->dev); | |
1469 | int err; | |
1470 | ||
1471 | IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS); | |
1472 | payload_len = skb->tail - (unsigned char *)skb->nh.ipv6h - | |
1473 | sizeof(struct ipv6hdr); | |
1474 | mldlen = skb->tail - skb->h.raw; | |
1475 | pip6->payload_len = htons(payload_len); | |
1476 | ||
1477 | pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen, | |
1478 | IPPROTO_ICMPV6, csum_partial(skb->h.raw, mldlen, 0)); | |
1479 | err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev, | |
e9823185 | 1480 | mld_dev_queue_xmit); |
1da177e4 LT |
1481 | if (!err) { |
1482 | ICMP6_INC_STATS(idev,ICMP6_MIB_OUTMSGS); | |
1483 | IP6_INC_STATS(IPSTATS_MIB_OUTMCASTPKTS); | |
1484 | } else | |
1485 | IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS); | |
1486 | ||
1487 | if (likely(idev != NULL)) | |
1488 | in6_dev_put(idev); | |
1489 | } | |
1490 | ||
1491 | static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel) | |
1492 | { | |
fab10fe3 | 1493 | return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel); |
1da177e4 LT |
1494 | } |
1495 | ||
1496 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1497 | int type, struct mld2_grec **ppgr) | |
1498 | { | |
1499 | struct net_device *dev = pmc->idev->dev; | |
1500 | struct mld2_report *pmr; | |
1501 | struct mld2_grec *pgr; | |
1502 | ||
1503 | if (!skb) | |
1504 | skb = mld_newpack(dev, dev->mtu); | |
1505 | if (!skb) | |
1506 | return NULL; | |
1507 | pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec)); | |
1508 | pgr->grec_type = type; | |
1509 | pgr->grec_auxwords = 0; | |
1510 | pgr->grec_nsrcs = 0; | |
1511 | pgr->grec_mca = pmc->mca_addr; /* structure copy */ | |
1512 | pmr = (struct mld2_report *)skb->h.raw; | |
1513 | pmr->ngrec = htons(ntohs(pmr->ngrec)+1); | |
1514 | *ppgr = pgr; | |
1515 | return skb; | |
1516 | } | |
1517 | ||
1518 | #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \ | |
1519 | skb_tailroom(skb)) : 0) | |
1520 | ||
1521 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1522 | int type, int gdeleted, int sdeleted) | |
1523 | { | |
1524 | struct net_device *dev = pmc->idev->dev; | |
1525 | struct mld2_report *pmr; | |
1526 | struct mld2_grec *pgr = NULL; | |
1527 | struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list; | |
5ab4a6c8 | 1528 | int scount, stotal, first, isquery, truncate; |
1da177e4 LT |
1529 | |
1530 | if (pmc->mca_flags & MAF_NOREPORT) | |
1531 | return skb; | |
1532 | ||
1533 | isquery = type == MLD2_MODE_IS_INCLUDE || | |
1534 | type == MLD2_MODE_IS_EXCLUDE; | |
1535 | truncate = type == MLD2_MODE_IS_EXCLUDE || | |
1536 | type == MLD2_CHANGE_TO_EXCLUDE; | |
1537 | ||
5ab4a6c8 DS |
1538 | stotal = scount = 0; |
1539 | ||
1da177e4 LT |
1540 | psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources; |
1541 | ||
5ab4a6c8 DS |
1542 | if (!*psf_list) |
1543 | goto empty_source; | |
1544 | ||
1da177e4 LT |
1545 | pmr = skb ? (struct mld2_report *)skb->h.raw : NULL; |
1546 | ||
1547 | /* EX and TO_EX get a fresh packet, if needed */ | |
1548 | if (truncate) { | |
1549 | if (pmr && pmr->ngrec && | |
1550 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { | |
1551 | if (skb) | |
1552 | mld_sendpack(skb); | |
1553 | skb = mld_newpack(dev, dev->mtu); | |
1554 | } | |
1555 | } | |
1556 | first = 1; | |
1da177e4 LT |
1557 | psf_prev = NULL; |
1558 | for (psf=*psf_list; psf; psf=psf_next) { | |
1559 | struct in6_addr *psrc; | |
1560 | ||
1561 | psf_next = psf->sf_next; | |
1562 | ||
1563 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) { | |
1564 | psf_prev = psf; | |
1565 | continue; | |
1566 | } | |
1567 | ||
1568 | /* clear marks on query responses */ | |
1569 | if (isquery) | |
1570 | psf->sf_gsresp = 0; | |
1571 | ||
1572 | if (AVAILABLE(skb) < sizeof(*psrc) + | |
1573 | first*sizeof(struct mld2_grec)) { | |
1574 | if (truncate && !first) | |
1575 | break; /* truncate these */ | |
1576 | if (pgr) | |
1577 | pgr->grec_nsrcs = htons(scount); | |
1578 | if (skb) | |
1579 | mld_sendpack(skb); | |
1580 | skb = mld_newpack(dev, dev->mtu); | |
1581 | first = 1; | |
1582 | scount = 0; | |
1583 | } | |
1584 | if (first) { | |
1585 | skb = add_grhead(skb, pmc, type, &pgr); | |
1586 | first = 0; | |
1587 | } | |
1588 | psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc)); | |
1589 | *psrc = psf->sf_addr; | |
5ab4a6c8 | 1590 | scount++; stotal++; |
1da177e4 LT |
1591 | if ((type == MLD2_ALLOW_NEW_SOURCES || |
1592 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) { | |
1593 | psf->sf_crcount--; | |
1594 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { | |
1595 | if (psf_prev) | |
1596 | psf_prev->sf_next = psf->sf_next; | |
1597 | else | |
1598 | *psf_list = psf->sf_next; | |
1599 | kfree(psf); | |
1600 | continue; | |
1601 | } | |
1602 | } | |
1603 | psf_prev = psf; | |
1604 | } | |
5ab4a6c8 DS |
1605 | |
1606 | empty_source: | |
1607 | if (!stotal) { | |
1608 | if (type == MLD2_ALLOW_NEW_SOURCES || | |
1609 | type == MLD2_BLOCK_OLD_SOURCES) | |
1610 | return skb; | |
1611 | if (pmc->mca_crcount || isquery) { | |
1612 | /* make sure we have room for group header */ | |
1613 | if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) { | |
1614 | mld_sendpack(skb); | |
1615 | skb = NULL; /* add_grhead will get a new one */ | |
1616 | } | |
1617 | skb = add_grhead(skb, pmc, type, &pgr); | |
1618 | } | |
1619 | } | |
1da177e4 LT |
1620 | if (pgr) |
1621 | pgr->grec_nsrcs = htons(scount); | |
1622 | ||
1623 | if (isquery) | |
1624 | pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */ | |
1625 | return skb; | |
1626 | } | |
1627 | ||
1628 | static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc) | |
1629 | { | |
1630 | struct sk_buff *skb = NULL; | |
1631 | int type; | |
1632 | ||
1633 | if (!pmc) { | |
1634 | read_lock_bh(&idev->lock); | |
1635 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1636 | if (pmc->mca_flags & MAF_NOREPORT) | |
1637 | continue; | |
1638 | spin_lock_bh(&pmc->mca_lock); | |
1639 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1640 | type = MLD2_MODE_IS_EXCLUDE; | |
1641 | else | |
1642 | type = MLD2_MODE_IS_INCLUDE; | |
1643 | skb = add_grec(skb, pmc, type, 0, 0); | |
1644 | spin_unlock_bh(&pmc->mca_lock); | |
1645 | } | |
1646 | read_unlock_bh(&idev->lock); | |
1647 | } else { | |
1648 | spin_lock_bh(&pmc->mca_lock); | |
1649 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1650 | type = MLD2_MODE_IS_EXCLUDE; | |
1651 | else | |
1652 | type = MLD2_MODE_IS_INCLUDE; | |
1653 | skb = add_grec(skb, pmc, type, 0, 0); | |
1654 | spin_unlock_bh(&pmc->mca_lock); | |
1655 | } | |
1656 | if (skb) | |
1657 | mld_sendpack(skb); | |
1658 | } | |
1659 | ||
1660 | /* | |
1661 | * remove zero-count source records from a source filter list | |
1662 | */ | |
1663 | static void mld_clear_zeros(struct ip6_sf_list **ppsf) | |
1664 | { | |
1665 | struct ip6_sf_list *psf_prev, *psf_next, *psf; | |
1666 | ||
1667 | psf_prev = NULL; | |
1668 | for (psf=*ppsf; psf; psf = psf_next) { | |
1669 | psf_next = psf->sf_next; | |
1670 | if (psf->sf_crcount == 0) { | |
1671 | if (psf_prev) | |
1672 | psf_prev->sf_next = psf->sf_next; | |
1673 | else | |
1674 | *ppsf = psf->sf_next; | |
1675 | kfree(psf); | |
1676 | } else | |
1677 | psf_prev = psf; | |
1678 | } | |
1679 | } | |
1680 | ||
1681 | static void mld_send_cr(struct inet6_dev *idev) | |
1682 | { | |
1683 | struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next; | |
1684 | struct sk_buff *skb = NULL; | |
1685 | int type, dtype; | |
1686 | ||
1687 | read_lock_bh(&idev->lock); | |
1688 | write_lock_bh(&idev->mc_lock); | |
1689 | ||
1690 | /* deleted MCA's */ | |
1691 | pmc_prev = NULL; | |
1692 | for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) { | |
1693 | pmc_next = pmc->next; | |
1694 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
1695 | type = MLD2_BLOCK_OLD_SOURCES; | |
1696 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1697 | skb = add_grec(skb, pmc, type, 1, 0); | |
1698 | skb = add_grec(skb, pmc, dtype, 1, 1); | |
1699 | } | |
1700 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1701 | if (pmc->mca_sfmode == MCAST_EXCLUDE) { |
1702 | type = MLD2_CHANGE_TO_INCLUDE; | |
1703 | skb = add_grec(skb, pmc, type, 1, 0); | |
1704 | } | |
5ab4a6c8 | 1705 | pmc->mca_crcount--; |
1da177e4 LT |
1706 | if (pmc->mca_crcount == 0) { |
1707 | mld_clear_zeros(&pmc->mca_tomb); | |
1708 | mld_clear_zeros(&pmc->mca_sources); | |
1709 | } | |
1710 | } | |
1711 | if (pmc->mca_crcount == 0 && !pmc->mca_tomb && | |
1712 | !pmc->mca_sources) { | |
1713 | if (pmc_prev) | |
1714 | pmc_prev->next = pmc_next; | |
1715 | else | |
1716 | idev->mc_tomb = pmc_next; | |
1717 | in6_dev_put(pmc->idev); | |
1718 | kfree(pmc); | |
1719 | } else | |
1720 | pmc_prev = pmc; | |
1721 | } | |
1722 | write_unlock_bh(&idev->mc_lock); | |
1723 | ||
1724 | /* change recs */ | |
1725 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1726 | spin_lock_bh(&pmc->mca_lock); | |
1727 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1728 | type = MLD2_BLOCK_OLD_SOURCES; | |
1729 | dtype = MLD2_ALLOW_NEW_SOURCES; | |
1730 | } else { | |
1731 | type = MLD2_ALLOW_NEW_SOURCES; | |
1732 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1733 | } | |
1734 | skb = add_grec(skb, pmc, type, 0, 0); | |
1735 | skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */ | |
1736 | ||
1737 | /* filter mode changes */ | |
1738 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1739 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
1740 | type = MLD2_CHANGE_TO_EXCLUDE; | |
1741 | else | |
1742 | type = MLD2_CHANGE_TO_INCLUDE; | |
1743 | skb = add_grec(skb, pmc, type, 0, 0); | |
5ab4a6c8 | 1744 | pmc->mca_crcount--; |
1da177e4 LT |
1745 | } |
1746 | spin_unlock_bh(&pmc->mca_lock); | |
1747 | } | |
1748 | read_unlock_bh(&idev->lock); | |
1749 | if (!skb) | |
1750 | return; | |
1751 | (void) mld_sendpack(skb); | |
1752 | } | |
1753 | ||
1754 | static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type) | |
1755 | { | |
1756 | struct sock *sk = igmp6_socket->sk; | |
1757 | struct inet6_dev *idev; | |
1758 | struct sk_buff *skb; | |
1759 | struct icmp6hdr *hdr; | |
1760 | struct in6_addr *snd_addr; | |
1761 | struct in6_addr *addrp; | |
1762 | struct in6_addr addr_buf; | |
1763 | struct in6_addr all_routers; | |
1764 | int err, len, payload_len, full_len; | |
1765 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1766 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1767 | IPV6_TLV_PADN, 0 }; | |
1768 | ||
1769 | IP6_INC_STATS(IPSTATS_MIB_OUTREQUESTS); | |
1770 | snd_addr = addr; | |
1771 | if (type == ICMPV6_MGM_REDUCTION) { | |
1772 | snd_addr = &all_routers; | |
1773 | ipv6_addr_all_routers(&all_routers); | |
1774 | } | |
1775 | ||
1776 | len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); | |
1777 | payload_len = len + sizeof(ra); | |
1778 | full_len = sizeof(struct ipv6hdr) + payload_len; | |
1779 | ||
1780 | skb = sock_alloc_send_skb(sk, LL_RESERVED_SPACE(dev) + full_len, 1, &err); | |
1781 | ||
1782 | if (skb == NULL) { | |
1783 | IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS); | |
1784 | return; | |
1785 | } | |
1786 | ||
1787 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
1da177e4 LT |
1788 | |
1789 | if (ipv6_get_lladdr(dev, &addr_buf)) { | |
1790 | /* <draft-ietf-magma-mld-source-05.txt>: | |
1791 | * use unspecified address as the source address | |
1792 | * when a valid link-local address is not available. | |
1793 | */ | |
1794 | memset(&addr_buf, 0, sizeof(addr_buf)); | |
1795 | } | |
1796 | ||
1797 | ip6_nd_hdr(sk, skb, dev, &addr_buf, snd_addr, NEXTHDR_HOP, payload_len); | |
1798 | ||
1799 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1800 | ||
1801 | hdr = (struct icmp6hdr *) skb_put(skb, sizeof(struct icmp6hdr)); | |
1802 | memset(hdr, 0, sizeof(struct icmp6hdr)); | |
1803 | hdr->icmp6_type = type; | |
1804 | ||
1805 | addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr)); | |
1806 | ipv6_addr_copy(addrp, addr); | |
1807 | ||
1808 | hdr->icmp6_cksum = csum_ipv6_magic(&addr_buf, snd_addr, len, | |
1809 | IPPROTO_ICMPV6, | |
1810 | csum_partial((__u8 *) hdr, len, 0)); | |
1811 | ||
1812 | idev = in6_dev_get(skb->dev); | |
1813 | ||
1814 | err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, skb->dev, | |
e9823185 | 1815 | mld_dev_queue_xmit); |
1da177e4 LT |
1816 | if (!err) { |
1817 | if (type == ICMPV6_MGM_REDUCTION) | |
1818 | ICMP6_INC_STATS(idev, ICMP6_MIB_OUTGROUPMEMBREDUCTIONS); | |
1819 | else | |
1820 | ICMP6_INC_STATS(idev, ICMP6_MIB_OUTGROUPMEMBRESPONSES); | |
1821 | ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS); | |
1822 | IP6_INC_STATS(IPSTATS_MIB_OUTMCASTPKTS); | |
1823 | } else | |
1824 | IP6_INC_STATS(IPSTATS_MIB_OUTDISCARDS); | |
1825 | ||
1826 | if (likely(idev != NULL)) | |
1827 | in6_dev_put(idev); | |
1828 | return; | |
1da177e4 LT |
1829 | } |
1830 | ||
1831 | static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode, | |
1832 | struct in6_addr *psfsrc) | |
1833 | { | |
1834 | struct ip6_sf_list *psf, *psf_prev; | |
1835 | int rv = 0; | |
1836 | ||
1837 | psf_prev = NULL; | |
1838 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1839 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) | |
1840 | break; | |
1841 | psf_prev = psf; | |
1842 | } | |
1843 | if (!psf || psf->sf_count[sfmode] == 0) { | |
1844 | /* source filter not found, or count wrong => bug */ | |
1845 | return -ESRCH; | |
1846 | } | |
1847 | psf->sf_count[sfmode]--; | |
1848 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { | |
1849 | struct inet6_dev *idev = pmc->idev; | |
1850 | ||
1851 | /* no more filters for this source */ | |
1852 | if (psf_prev) | |
1853 | psf_prev->sf_next = psf->sf_next; | |
1854 | else | |
1855 | pmc->mca_sources = psf->sf_next; | |
1856 | if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) && | |
1857 | !MLD_V1_SEEN(idev)) { | |
1858 | psf->sf_crcount = idev->mc_qrv; | |
1859 | psf->sf_next = pmc->mca_tomb; | |
1860 | pmc->mca_tomb = psf; | |
1861 | rv = 1; | |
1862 | } else | |
1863 | kfree(psf); | |
1864 | } | |
1865 | return rv; | |
1866 | } | |
1867 | ||
1868 | static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
1869 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
1870 | int delta) | |
1871 | { | |
1872 | struct ifmcaddr6 *pmc; | |
1873 | int changerec = 0; | |
1874 | int i, err; | |
1875 | ||
1876 | if (!idev) | |
1877 | return -ENODEV; | |
1878 | read_lock_bh(&idev->lock); | |
1879 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1880 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) | |
1881 | break; | |
1882 | } | |
1883 | if (!pmc) { | |
1884 | /* MCA not found?? bug */ | |
1885 | read_unlock_bh(&idev->lock); | |
1886 | return -ESRCH; | |
1887 | } | |
1888 | spin_lock_bh(&pmc->mca_lock); | |
1889 | sf_markstate(pmc); | |
1890 | if (!delta) { | |
1891 | if (!pmc->mca_sfcount[sfmode]) { | |
1892 | spin_unlock_bh(&pmc->mca_lock); | |
1893 | read_unlock_bh(&idev->lock); | |
1894 | return -EINVAL; | |
1895 | } | |
1896 | pmc->mca_sfcount[sfmode]--; | |
1897 | } | |
1898 | err = 0; | |
1899 | for (i=0; i<sfcount; i++) { | |
1900 | int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); | |
1901 | ||
1902 | changerec |= rv > 0; | |
1903 | if (!err && rv < 0) | |
1904 | err = rv; | |
1905 | } | |
1906 | if (pmc->mca_sfmode == MCAST_EXCLUDE && | |
1907 | pmc->mca_sfcount[MCAST_EXCLUDE] == 0 && | |
1908 | pmc->mca_sfcount[MCAST_INCLUDE]) { | |
1909 | struct ip6_sf_list *psf; | |
1910 | ||
1911 | /* filter mode change */ | |
1912 | pmc->mca_sfmode = MCAST_INCLUDE; | |
1913 | pmc->mca_crcount = idev->mc_qrv; | |
1914 | idev->mc_ifc_count = pmc->mca_crcount; | |
1915 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) | |
1916 | psf->sf_crcount = 0; | |
1917 | mld_ifc_event(pmc->idev); | |
1918 | } else if (sf_setstate(pmc) || changerec) | |
1919 | mld_ifc_event(pmc->idev); | |
1920 | spin_unlock_bh(&pmc->mca_lock); | |
1921 | read_unlock_bh(&idev->lock); | |
1922 | return err; | |
1923 | } | |
1924 | ||
1925 | /* | |
1926 | * Add multicast single-source filter to the interface list | |
1927 | */ | |
1928 | static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode, | |
1929 | struct in6_addr *psfsrc, int delta) | |
1930 | { | |
1931 | struct ip6_sf_list *psf, *psf_prev; | |
1932 | ||
1933 | psf_prev = NULL; | |
1934 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1935 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) | |
1936 | break; | |
1937 | psf_prev = psf; | |
1938 | } | |
1939 | if (!psf) { | |
1940 | psf = (struct ip6_sf_list *)kmalloc(sizeof(*psf), GFP_ATOMIC); | |
1941 | if (!psf) | |
1942 | return -ENOBUFS; | |
1943 | memset(psf, 0, sizeof(*psf)); | |
1944 | psf->sf_addr = *psfsrc; | |
1945 | if (psf_prev) { | |
1946 | psf_prev->sf_next = psf; | |
1947 | } else | |
1948 | pmc->mca_sources = psf; | |
1949 | } | |
1950 | psf->sf_count[sfmode]++; | |
1951 | return 0; | |
1952 | } | |
1953 | ||
1954 | static void sf_markstate(struct ifmcaddr6 *pmc) | |
1955 | { | |
1956 | struct ip6_sf_list *psf; | |
1957 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; | |
1958 | ||
1959 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) | |
1960 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1961 | psf->sf_oldin = mca_xcount == | |
1962 | psf->sf_count[MCAST_EXCLUDE] && | |
1963 | !psf->sf_count[MCAST_INCLUDE]; | |
1964 | } else | |
1965 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; | |
1966 | } | |
1967 | ||
1968 | static int sf_setstate(struct ifmcaddr6 *pmc) | |
1969 | { | |
1970 | struct ip6_sf_list *psf; | |
1971 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; | |
1972 | int qrv = pmc->idev->mc_qrv; | |
1973 | int new_in, rv; | |
1974 | ||
1975 | rv = 0; | |
1976 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1977 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1978 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && | |
1979 | !psf->sf_count[MCAST_INCLUDE]; | |
1980 | } else | |
1981 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; | |
1982 | if (new_in != psf->sf_oldin) { | |
1983 | psf->sf_crcount = qrv; | |
1984 | rv++; | |
1985 | } | |
1986 | } | |
1987 | return rv; | |
1988 | } | |
1989 | ||
1990 | /* | |
1991 | * Add multicast source filter list to the interface list | |
1992 | */ | |
1993 | static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
1994 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
1995 | int delta) | |
1996 | { | |
1997 | struct ifmcaddr6 *pmc; | |
1998 | int isexclude; | |
1999 | int i, err; | |
2000 | ||
2001 | if (!idev) | |
2002 | return -ENODEV; | |
2003 | read_lock_bh(&idev->lock); | |
2004 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
2005 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) | |
2006 | break; | |
2007 | } | |
2008 | if (!pmc) { | |
2009 | /* MCA not found?? bug */ | |
2010 | read_unlock_bh(&idev->lock); | |
2011 | return -ESRCH; | |
2012 | } | |
2013 | spin_lock_bh(&pmc->mca_lock); | |
2014 | ||
2015 | sf_markstate(pmc); | |
2016 | isexclude = pmc->mca_sfmode == MCAST_EXCLUDE; | |
2017 | if (!delta) | |
2018 | pmc->mca_sfcount[sfmode]++; | |
2019 | err = 0; | |
2020 | for (i=0; i<sfcount; i++) { | |
2021 | err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta); | |
2022 | if (err) | |
2023 | break; | |
2024 | } | |
2025 | if (err) { | |
2026 | int j; | |
2027 | ||
2028 | if (!delta) | |
2029 | pmc->mca_sfcount[sfmode]--; | |
2030 | for (j=0; j<i; j++) | |
2031 | (void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); | |
2032 | } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) { | |
2033 | struct inet6_dev *idev = pmc->idev; | |
2034 | struct ip6_sf_list *psf; | |
2035 | ||
2036 | /* filter mode change */ | |
2037 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2038 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
2039 | else if (pmc->mca_sfcount[MCAST_INCLUDE]) | |
2040 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2041 | /* else no filters; keep old mode for reports */ | |
2042 | ||
2043 | pmc->mca_crcount = idev->mc_qrv; | |
2044 | idev->mc_ifc_count = pmc->mca_crcount; | |
2045 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) | |
2046 | psf->sf_crcount = 0; | |
2047 | mld_ifc_event(idev); | |
2048 | } else if (sf_setstate(pmc)) | |
2049 | mld_ifc_event(idev); | |
2050 | spin_unlock_bh(&pmc->mca_lock); | |
2051 | read_unlock_bh(&idev->lock); | |
2052 | return err; | |
2053 | } | |
2054 | ||
2055 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc) | |
2056 | { | |
2057 | struct ip6_sf_list *psf, *nextpsf; | |
2058 | ||
2059 | for (psf=pmc->mca_tomb; psf; psf=nextpsf) { | |
2060 | nextpsf = psf->sf_next; | |
2061 | kfree(psf); | |
2062 | } | |
2063 | pmc->mca_tomb = NULL; | |
2064 | for (psf=pmc->mca_sources; psf; psf=nextpsf) { | |
2065 | nextpsf = psf->sf_next; | |
2066 | kfree(psf); | |
2067 | } | |
2068 | pmc->mca_sources = NULL; | |
2069 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
de9daad9 | 2070 | pmc->mca_sfcount[MCAST_INCLUDE] = 0; |
1da177e4 LT |
2071 | pmc->mca_sfcount[MCAST_EXCLUDE] = 1; |
2072 | } | |
2073 | ||
2074 | ||
2075 | static void igmp6_join_group(struct ifmcaddr6 *ma) | |
2076 | { | |
2077 | unsigned long delay; | |
2078 | ||
2079 | if (ma->mca_flags & MAF_NOREPORT) | |
2080 | return; | |
2081 | ||
2082 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2083 | ||
2084 | delay = net_random() % IGMP6_UNSOLICITED_IVAL; | |
2085 | ||
2086 | spin_lock_bh(&ma->mca_lock); | |
2087 | if (del_timer(&ma->mca_timer)) { | |
2088 | atomic_dec(&ma->mca_refcnt); | |
2089 | delay = ma->mca_timer.expires - jiffies; | |
2090 | } | |
2091 | ||
2092 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
2093 | atomic_inc(&ma->mca_refcnt); | |
2094 | ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER; | |
2095 | spin_unlock_bh(&ma->mca_lock); | |
2096 | } | |
2097 | ||
2098 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
2099 | struct inet6_dev *idev) | |
2100 | { | |
2101 | int err; | |
2102 | ||
5ab4a6c8 DS |
2103 | /* callers have the socket lock and a write lock on ipv6_sk_mc_lock, |
2104 | * so no other readers or writers of iml or its sflist | |
2105 | */ | |
1da177e4 LT |
2106 | if (iml->sflist == 0) { |
2107 | /* any-source empty exclude case */ | |
2108 | return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0); | |
2109 | } | |
2110 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, | |
2111 | iml->sflist->sl_count, iml->sflist->sl_addr, 0); | |
2112 | sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max)); | |
2113 | iml->sflist = NULL; | |
2114 | return err; | |
2115 | } | |
2116 | ||
2117 | static void igmp6_leave_group(struct ifmcaddr6 *ma) | |
2118 | { | |
2119 | if (MLD_V1_SEEN(ma->idev)) { | |
2120 | if (ma->mca_flags & MAF_LAST_REPORTER) | |
2121 | igmp6_send(&ma->mca_addr, ma->idev->dev, | |
2122 | ICMPV6_MGM_REDUCTION); | |
2123 | } else { | |
2124 | mld_add_delrec(ma->idev, ma); | |
2125 | mld_ifc_event(ma->idev); | |
2126 | } | |
2127 | } | |
2128 | ||
2129 | static void mld_gq_timer_expire(unsigned long data) | |
2130 | { | |
2131 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2132 | ||
2133 | idev->mc_gq_running = 0; | |
2134 | mld_send_report(idev, NULL); | |
2135 | __in6_dev_put(idev); | |
2136 | } | |
2137 | ||
2138 | static void mld_ifc_timer_expire(unsigned long data) | |
2139 | { | |
2140 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2141 | ||
2142 | mld_send_cr(idev); | |
2143 | if (idev->mc_ifc_count) { | |
2144 | idev->mc_ifc_count--; | |
2145 | if (idev->mc_ifc_count) | |
2146 | mld_ifc_start_timer(idev, idev->mc_maxdelay); | |
2147 | } | |
2148 | __in6_dev_put(idev); | |
2149 | } | |
2150 | ||
2151 | static void mld_ifc_event(struct inet6_dev *idev) | |
2152 | { | |
2153 | if (MLD_V1_SEEN(idev)) | |
2154 | return; | |
2155 | idev->mc_ifc_count = idev->mc_qrv; | |
2156 | mld_ifc_start_timer(idev, 1); | |
2157 | } | |
2158 | ||
2159 | ||
2160 | static void igmp6_timer_handler(unsigned long data) | |
2161 | { | |
2162 | struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data; | |
2163 | ||
2164 | if (MLD_V1_SEEN(ma->idev)) | |
2165 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2166 | else | |
2167 | mld_send_report(ma->idev, ma); | |
2168 | ||
2169 | spin_lock(&ma->mca_lock); | |
2170 | ma->mca_flags |= MAF_LAST_REPORTER; | |
2171 | ma->mca_flags &= ~MAF_TIMER_RUNNING; | |
2172 | spin_unlock(&ma->mca_lock); | |
2173 | ma_put(ma); | |
2174 | } | |
2175 | ||
2176 | /* Device going down */ | |
2177 | ||
2178 | void ipv6_mc_down(struct inet6_dev *idev) | |
2179 | { | |
2180 | struct ifmcaddr6 *i; | |
2181 | ||
2182 | /* Withdraw multicast list */ | |
2183 | ||
2184 | read_lock_bh(&idev->lock); | |
2185 | idev->mc_ifc_count = 0; | |
2186 | if (del_timer(&idev->mc_ifc_timer)) | |
2187 | __in6_dev_put(idev); | |
2188 | idev->mc_gq_running = 0; | |
2189 | if (del_timer(&idev->mc_gq_timer)) | |
2190 | __in6_dev_put(idev); | |
2191 | ||
2192 | for (i = idev->mc_list; i; i=i->next) | |
2193 | igmp6_group_dropped(i); | |
2194 | read_unlock_bh(&idev->lock); | |
2195 | ||
2196 | mld_clear_delrec(idev); | |
2197 | } | |
2198 | ||
2199 | ||
2200 | /* Device going up */ | |
2201 | ||
2202 | void ipv6_mc_up(struct inet6_dev *idev) | |
2203 | { | |
2204 | struct ifmcaddr6 *i; | |
2205 | ||
2206 | /* Install multicast list, except for all-nodes (already installed) */ | |
2207 | ||
2208 | read_lock_bh(&idev->lock); | |
2209 | for (i = idev->mc_list; i; i=i->next) | |
2210 | igmp6_group_added(i); | |
2211 | read_unlock_bh(&idev->lock); | |
2212 | } | |
2213 | ||
2214 | /* IPv6 device initialization. */ | |
2215 | ||
2216 | void ipv6_mc_init_dev(struct inet6_dev *idev) | |
2217 | { | |
2218 | struct in6_addr maddr; | |
2219 | ||
2220 | write_lock_bh(&idev->lock); | |
2221 | rwlock_init(&idev->mc_lock); | |
2222 | idev->mc_gq_running = 0; | |
2223 | init_timer(&idev->mc_gq_timer); | |
2224 | idev->mc_gq_timer.data = (unsigned long) idev; | |
2225 | idev->mc_gq_timer.function = &mld_gq_timer_expire; | |
2226 | idev->mc_tomb = NULL; | |
2227 | idev->mc_ifc_count = 0; | |
2228 | init_timer(&idev->mc_ifc_timer); | |
2229 | idev->mc_ifc_timer.data = (unsigned long) idev; | |
2230 | idev->mc_ifc_timer.function = &mld_ifc_timer_expire; | |
2231 | idev->mc_qrv = MLD_QRV_DEFAULT; | |
2232 | idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL; | |
2233 | idev->mc_v1_seen = 0; | |
2234 | write_unlock_bh(&idev->lock); | |
2235 | ||
2236 | /* Add all-nodes address. */ | |
2237 | ipv6_addr_all_nodes(&maddr); | |
2238 | ipv6_dev_mc_inc(idev->dev, &maddr); | |
2239 | } | |
2240 | ||
2241 | /* | |
2242 | * Device is about to be destroyed: clean up. | |
2243 | */ | |
2244 | ||
2245 | void ipv6_mc_destroy_dev(struct inet6_dev *idev) | |
2246 | { | |
2247 | struct ifmcaddr6 *i; | |
2248 | struct in6_addr maddr; | |
2249 | ||
2250 | /* Deactivate timers */ | |
2251 | ipv6_mc_down(idev); | |
2252 | ||
2253 | /* Delete all-nodes address. */ | |
2254 | ipv6_addr_all_nodes(&maddr); | |
2255 | ||
2256 | /* We cannot call ipv6_dev_mc_dec() directly, our caller in | |
2257 | * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will | |
2258 | * fail. | |
2259 | */ | |
2260 | __ipv6_dev_mc_dec(idev, &maddr); | |
2261 | ||
2262 | if (idev->cnf.forwarding) { | |
2263 | ipv6_addr_all_routers(&maddr); | |
2264 | __ipv6_dev_mc_dec(idev, &maddr); | |
2265 | } | |
2266 | ||
2267 | write_lock_bh(&idev->lock); | |
2268 | while ((i = idev->mc_list) != NULL) { | |
2269 | idev->mc_list = i->next; | |
2270 | write_unlock_bh(&idev->lock); | |
2271 | ||
2272 | igmp6_group_dropped(i); | |
2273 | ma_put(i); | |
2274 | ||
2275 | write_lock_bh(&idev->lock); | |
2276 | } | |
2277 | write_unlock_bh(&idev->lock); | |
2278 | } | |
2279 | ||
2280 | #ifdef CONFIG_PROC_FS | |
2281 | struct igmp6_mc_iter_state { | |
2282 | struct net_device *dev; | |
2283 | struct inet6_dev *idev; | |
2284 | }; | |
2285 | ||
2286 | #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private) | |
2287 | ||
2288 | static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq) | |
2289 | { | |
2290 | struct ifmcaddr6 *im = NULL; | |
2291 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2292 | ||
2293 | for (state->dev = dev_base, state->idev = NULL; | |
2294 | state->dev; | |
2295 | state->dev = state->dev->next) { | |
2296 | struct inet6_dev *idev; | |
2297 | idev = in6_dev_get(state->dev); | |
2298 | if (!idev) | |
2299 | continue; | |
2300 | read_lock_bh(&idev->lock); | |
2301 | im = idev->mc_list; | |
2302 | if (im) { | |
2303 | state->idev = idev; | |
2304 | break; | |
2305 | } | |
2306 | read_unlock_bh(&idev->lock); | |
2307 | in6_dev_put(idev); | |
2308 | } | |
2309 | return im; | |
2310 | } | |
2311 | ||
2312 | static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im) | |
2313 | { | |
2314 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2315 | ||
2316 | im = im->next; | |
2317 | while (!im) { | |
2318 | if (likely(state->idev != NULL)) { | |
2319 | read_unlock_bh(&state->idev->lock); | |
2320 | in6_dev_put(state->idev); | |
2321 | } | |
2322 | state->dev = state->dev->next; | |
2323 | if (!state->dev) { | |
2324 | state->idev = NULL; | |
2325 | break; | |
2326 | } | |
2327 | state->idev = in6_dev_get(state->dev); | |
2328 | if (!state->idev) | |
2329 | continue; | |
2330 | read_lock_bh(&state->idev->lock); | |
2331 | im = state->idev->mc_list; | |
2332 | } | |
2333 | return im; | |
2334 | } | |
2335 | ||
2336 | static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos) | |
2337 | { | |
2338 | struct ifmcaddr6 *im = igmp6_mc_get_first(seq); | |
2339 | if (im) | |
2340 | while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL) | |
2341 | --pos; | |
2342 | return pos ? NULL : im; | |
2343 | } | |
2344 | ||
2345 | static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos) | |
2346 | { | |
2347 | read_lock(&dev_base_lock); | |
2348 | return igmp6_mc_get_idx(seq, *pos); | |
2349 | } | |
2350 | ||
2351 | static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2352 | { | |
2353 | struct ifmcaddr6 *im; | |
2354 | im = igmp6_mc_get_next(seq, v); | |
2355 | ++*pos; | |
2356 | return im; | |
2357 | } | |
2358 | ||
2359 | static void igmp6_mc_seq_stop(struct seq_file *seq, void *v) | |
2360 | { | |
2361 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2362 | if (likely(state->idev != NULL)) { | |
2363 | read_unlock_bh(&state->idev->lock); | |
2364 | in6_dev_put(state->idev); | |
2365 | state->idev = NULL; | |
2366 | } | |
2367 | state->dev = NULL; | |
2368 | read_unlock(&dev_base_lock); | |
2369 | } | |
2370 | ||
2371 | static int igmp6_mc_seq_show(struct seq_file *seq, void *v) | |
2372 | { | |
2373 | struct ifmcaddr6 *im = (struct ifmcaddr6 *)v; | |
2374 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2375 | ||
2376 | seq_printf(seq, | |
2377 | "%-4d %-15s %04x%04x%04x%04x%04x%04x%04x%04x %5d %08X %ld\n", | |
2378 | state->dev->ifindex, state->dev->name, | |
2379 | NIP6(im->mca_addr), | |
2380 | im->mca_users, im->mca_flags, | |
2381 | (im->mca_flags&MAF_TIMER_RUNNING) ? | |
2382 | jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0); | |
2383 | return 0; | |
2384 | } | |
2385 | ||
2386 | static struct seq_operations igmp6_mc_seq_ops = { | |
2387 | .start = igmp6_mc_seq_start, | |
2388 | .next = igmp6_mc_seq_next, | |
2389 | .stop = igmp6_mc_seq_stop, | |
2390 | .show = igmp6_mc_seq_show, | |
2391 | }; | |
2392 | ||
2393 | static int igmp6_mc_seq_open(struct inode *inode, struct file *file) | |
2394 | { | |
2395 | struct seq_file *seq; | |
2396 | int rc = -ENOMEM; | |
2397 | struct igmp6_mc_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL); | |
2398 | ||
2399 | if (!s) | |
2400 | goto out; | |
2401 | ||
2402 | rc = seq_open(file, &igmp6_mc_seq_ops); | |
2403 | if (rc) | |
2404 | goto out_kfree; | |
2405 | ||
2406 | seq = file->private_data; | |
2407 | seq->private = s; | |
2408 | memset(s, 0, sizeof(*s)); | |
2409 | out: | |
2410 | return rc; | |
2411 | out_kfree: | |
2412 | kfree(s); | |
2413 | goto out; | |
2414 | } | |
2415 | ||
2416 | static struct file_operations igmp6_mc_seq_fops = { | |
2417 | .owner = THIS_MODULE, | |
2418 | .open = igmp6_mc_seq_open, | |
2419 | .read = seq_read, | |
2420 | .llseek = seq_lseek, | |
2421 | .release = seq_release_private, | |
2422 | }; | |
2423 | ||
2424 | struct igmp6_mcf_iter_state { | |
2425 | struct net_device *dev; | |
2426 | struct inet6_dev *idev; | |
2427 | struct ifmcaddr6 *im; | |
2428 | }; | |
2429 | ||
2430 | #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private) | |
2431 | ||
2432 | static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq) | |
2433 | { | |
2434 | struct ip6_sf_list *psf = NULL; | |
2435 | struct ifmcaddr6 *im = NULL; | |
2436 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2437 | ||
2438 | for (state->dev = dev_base, state->idev = NULL, state->im = NULL; | |
2439 | state->dev; | |
2440 | state->dev = state->dev->next) { | |
2441 | struct inet6_dev *idev; | |
2442 | idev = in6_dev_get(state->dev); | |
2443 | if (unlikely(idev == NULL)) | |
2444 | continue; | |
2445 | read_lock_bh(&idev->lock); | |
2446 | im = idev->mc_list; | |
2447 | if (likely(im != NULL)) { | |
2448 | spin_lock_bh(&im->mca_lock); | |
2449 | psf = im->mca_sources; | |
2450 | if (likely(psf != NULL)) { | |
2451 | state->im = im; | |
2452 | state->idev = idev; | |
2453 | break; | |
2454 | } | |
2455 | spin_unlock_bh(&im->mca_lock); | |
2456 | } | |
2457 | read_unlock_bh(&idev->lock); | |
2458 | in6_dev_put(idev); | |
2459 | } | |
2460 | return psf; | |
2461 | } | |
2462 | ||
2463 | static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf) | |
2464 | { | |
2465 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2466 | ||
2467 | psf = psf->sf_next; | |
2468 | while (!psf) { | |
2469 | spin_unlock_bh(&state->im->mca_lock); | |
2470 | state->im = state->im->next; | |
2471 | while (!state->im) { | |
2472 | if (likely(state->idev != NULL)) { | |
2473 | read_unlock_bh(&state->idev->lock); | |
2474 | in6_dev_put(state->idev); | |
2475 | } | |
2476 | state->dev = state->dev->next; | |
2477 | if (!state->dev) { | |
2478 | state->idev = NULL; | |
2479 | goto out; | |
2480 | } | |
2481 | state->idev = in6_dev_get(state->dev); | |
2482 | if (!state->idev) | |
2483 | continue; | |
2484 | read_lock_bh(&state->idev->lock); | |
2485 | state->im = state->idev->mc_list; | |
2486 | } | |
2487 | if (!state->im) | |
2488 | break; | |
2489 | spin_lock_bh(&state->im->mca_lock); | |
2490 | psf = state->im->mca_sources; | |
2491 | } | |
2492 | out: | |
2493 | return psf; | |
2494 | } | |
2495 | ||
2496 | static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos) | |
2497 | { | |
2498 | struct ip6_sf_list *psf = igmp6_mcf_get_first(seq); | |
2499 | if (psf) | |
2500 | while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL) | |
2501 | --pos; | |
2502 | return pos ? NULL : psf; | |
2503 | } | |
2504 | ||
2505 | static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos) | |
2506 | { | |
2507 | read_lock(&dev_base_lock); | |
2508 | return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
2509 | } | |
2510 | ||
2511 | static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2512 | { | |
2513 | struct ip6_sf_list *psf; | |
2514 | if (v == SEQ_START_TOKEN) | |
2515 | psf = igmp6_mcf_get_first(seq); | |
2516 | else | |
2517 | psf = igmp6_mcf_get_next(seq, v); | |
2518 | ++*pos; | |
2519 | return psf; | |
2520 | } | |
2521 | ||
2522 | static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v) | |
2523 | { | |
2524 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2525 | if (likely(state->im != NULL)) { | |
2526 | spin_unlock_bh(&state->im->mca_lock); | |
2527 | state->im = NULL; | |
2528 | } | |
2529 | if (likely(state->idev != NULL)) { | |
2530 | read_unlock_bh(&state->idev->lock); | |
2531 | in6_dev_put(state->idev); | |
2532 | state->idev = NULL; | |
2533 | } | |
2534 | state->dev = NULL; | |
2535 | read_unlock(&dev_base_lock); | |
2536 | } | |
2537 | ||
2538 | static int igmp6_mcf_seq_show(struct seq_file *seq, void *v) | |
2539 | { | |
2540 | struct ip6_sf_list *psf = (struct ip6_sf_list *)v; | |
2541 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2542 | ||
2543 | if (v == SEQ_START_TOKEN) { | |
2544 | seq_printf(seq, | |
2545 | "%3s %6s " | |
2546 | "%32s %32s %6s %6s\n", "Idx", | |
2547 | "Device", "Multicast Address", | |
2548 | "Source Address", "INC", "EXC"); | |
2549 | } else { | |
2550 | seq_printf(seq, | |
2551 | "%3d %6.6s " | |
2552 | "%04x%04x%04x%04x%04x%04x%04x%04x " | |
2553 | "%04x%04x%04x%04x%04x%04x%04x%04x " | |
2554 | "%6lu %6lu\n", | |
2555 | state->dev->ifindex, state->dev->name, | |
2556 | NIP6(state->im->mca_addr), | |
2557 | NIP6(psf->sf_addr), | |
2558 | psf->sf_count[MCAST_INCLUDE], | |
2559 | psf->sf_count[MCAST_EXCLUDE]); | |
2560 | } | |
2561 | return 0; | |
2562 | } | |
2563 | ||
2564 | static struct seq_operations igmp6_mcf_seq_ops = { | |
2565 | .start = igmp6_mcf_seq_start, | |
2566 | .next = igmp6_mcf_seq_next, | |
2567 | .stop = igmp6_mcf_seq_stop, | |
2568 | .show = igmp6_mcf_seq_show, | |
2569 | }; | |
2570 | ||
2571 | static int igmp6_mcf_seq_open(struct inode *inode, struct file *file) | |
2572 | { | |
2573 | struct seq_file *seq; | |
2574 | int rc = -ENOMEM; | |
2575 | struct igmp6_mcf_iter_state *s = kmalloc(sizeof(*s), GFP_KERNEL); | |
2576 | ||
2577 | if (!s) | |
2578 | goto out; | |
2579 | ||
2580 | rc = seq_open(file, &igmp6_mcf_seq_ops); | |
2581 | if (rc) | |
2582 | goto out_kfree; | |
2583 | ||
2584 | seq = file->private_data; | |
2585 | seq->private = s; | |
2586 | memset(s, 0, sizeof(*s)); | |
2587 | out: | |
2588 | return rc; | |
2589 | out_kfree: | |
2590 | kfree(s); | |
2591 | goto out; | |
2592 | } | |
2593 | ||
2594 | static struct file_operations igmp6_mcf_seq_fops = { | |
2595 | .owner = THIS_MODULE, | |
2596 | .open = igmp6_mcf_seq_open, | |
2597 | .read = seq_read, | |
2598 | .llseek = seq_lseek, | |
2599 | .release = seq_release_private, | |
2600 | }; | |
2601 | #endif | |
2602 | ||
2603 | int __init igmp6_init(struct net_proto_family *ops) | |
2604 | { | |
2605 | struct ipv6_pinfo *np; | |
2606 | struct sock *sk; | |
2607 | int err; | |
2608 | ||
2609 | err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, &igmp6_socket); | |
2610 | if (err < 0) { | |
2611 | printk(KERN_ERR | |
2612 | "Failed to initialize the IGMP6 control socket (err %d).\n", | |
2613 | err); | |
2614 | igmp6_socket = NULL; /* For safety. */ | |
2615 | return err; | |
2616 | } | |
2617 | ||
2618 | sk = igmp6_socket->sk; | |
2619 | sk->sk_allocation = GFP_ATOMIC; | |
2620 | sk->sk_prot->unhash(sk); | |
2621 | ||
2622 | np = inet6_sk(sk); | |
2623 | np->hop_limit = 1; | |
2624 | ||
2625 | #ifdef CONFIG_PROC_FS | |
2626 | proc_net_fops_create("igmp6", S_IRUGO, &igmp6_mc_seq_fops); | |
2627 | proc_net_fops_create("mcfilter6", S_IRUGO, &igmp6_mcf_seq_fops); | |
2628 | #endif | |
2629 | ||
2630 | return 0; | |
2631 | } | |
2632 | ||
2633 | void igmp6_cleanup(void) | |
2634 | { | |
2635 | sock_release(igmp6_socket); | |
2636 | igmp6_socket = NULL; /* for safety */ | |
2637 | ||
2638 | #ifdef CONFIG_PROC_FS | |
2639 | proc_net_remove("mcfilter6"); | |
2640 | proc_net_remove("igmp6"); | |
2641 | #endif | |
2642 | } |