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 | ||
1da177e4 LT |
129 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr); |
130 | ||
131 | static void igmp6_join_group(struct ifmcaddr6 *ma); | |
132 | static void igmp6_leave_group(struct ifmcaddr6 *ma); | |
133 | static void igmp6_timer_handler(unsigned long data); | |
134 | ||
135 | static void mld_gq_timer_expire(unsigned long data); | |
136 | static void mld_ifc_timer_expire(unsigned long data); | |
137 | static void mld_ifc_event(struct inet6_dev *idev); | |
138 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *pmc); | |
139 | static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *addr); | |
140 | static void mld_clear_delrec(struct inet6_dev *idev); | |
141 | static int sf_setstate(struct ifmcaddr6 *pmc); | |
142 | static void sf_markstate(struct ifmcaddr6 *pmc); | |
143 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc); | |
144 | static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
145 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
146 | int delta); | |
147 | static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
148 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
149 | int delta); | |
150 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
151 | struct inet6_dev *idev); | |
152 | ||
153 | ||
154 | #define IGMP6_UNSOLICITED_IVAL (10*HZ) | |
155 | #define MLD_QRV_DEFAULT 2 | |
156 | ||
157 | #define MLD_V1_SEEN(idev) (ipv6_devconf.force_mld_version == 1 || \ | |
158 | (idev)->cnf.force_mld_version == 1 || \ | |
159 | ((idev)->mc_v1_seen && \ | |
160 | time_before(jiffies, (idev)->mc_v1_seen))) | |
161 | ||
162 | #define MLDV2_MASK(value, nb) ((nb)>=32 ? (value) : ((1<<(nb))-1) & (value)) | |
163 | #define MLDV2_EXP(thresh, nbmant, nbexp, value) \ | |
164 | ((value) < (thresh) ? (value) : \ | |
f12baeab | 165 | ((MLDV2_MASK(value, nbmant) | (1<<(nbmant))) << \ |
1da177e4 LT |
166 | (MLDV2_MASK((value) >> (nbmant), nbexp) + (nbexp)))) |
167 | ||
168 | #define MLDV2_QQIC(value) MLDV2_EXP(0x80, 4, 3, value) | |
169 | #define MLDV2_MRC(value) MLDV2_EXP(0x8000, 12, 3, value) | |
170 | ||
6f4353d8 | 171 | #define IPV6_MLD_MAX_MSF 64 |
1da177e4 | 172 | |
ab32ea5d | 173 | int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF; |
1da177e4 LT |
174 | |
175 | /* | |
176 | * socket join on multicast group | |
177 | */ | |
178 | ||
179 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, struct in6_addr *addr) | |
180 | { | |
181 | struct net_device *dev = NULL; | |
182 | struct ipv6_mc_socklist *mc_lst; | |
183 | struct ipv6_pinfo *np = inet6_sk(sk); | |
b8ad0cbc | 184 | struct net *net = sk->sk_net; |
1da177e4 LT |
185 | int err; |
186 | ||
187 | if (!ipv6_addr_is_multicast(addr)) | |
188 | return -EINVAL; | |
189 | ||
c9e3e8b6 DS |
190 | read_lock_bh(&ipv6_sk_mc_lock); |
191 | for (mc_lst=np->ipv6_mc_list; mc_lst; mc_lst=mc_lst->next) { | |
192 | if ((ifindex == 0 || mc_lst->ifindex == ifindex) && | |
193 | ipv6_addr_equal(&mc_lst->addr, addr)) { | |
194 | read_unlock_bh(&ipv6_sk_mc_lock); | |
195 | return -EADDRINUSE; | |
196 | } | |
197 | } | |
198 | read_unlock_bh(&ipv6_sk_mc_lock); | |
199 | ||
1da177e4 LT |
200 | mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL); |
201 | ||
202 | if (mc_lst == NULL) | |
203 | return -ENOMEM; | |
204 | ||
205 | mc_lst->next = NULL; | |
206 | ipv6_addr_copy(&mc_lst->addr, addr); | |
207 | ||
208 | if (ifindex == 0) { | |
209 | struct rt6_info *rt; | |
b8ad0cbc | 210 | rt = rt6_lookup(net, addr, NULL, 0, 0); |
1da177e4 LT |
211 | if (rt) { |
212 | dev = rt->rt6i_dev; | |
213 | dev_hold(dev); | |
214 | dst_release(&rt->u.dst); | |
215 | } | |
216 | } else | |
b8ad0cbc | 217 | dev = dev_get_by_index(net, ifindex); |
1da177e4 LT |
218 | |
219 | if (dev == NULL) { | |
220 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); | |
221 | return -ENODEV; | |
222 | } | |
223 | ||
224 | mc_lst->ifindex = dev->ifindex; | |
225 | mc_lst->sfmode = MCAST_EXCLUDE; | |
196433c5 | 226 | rwlock_init(&mc_lst->sflock); |
1da177e4 LT |
227 | mc_lst->sflist = NULL; |
228 | ||
229 | /* | |
230 | * now add/increase the group membership on the device | |
231 | */ | |
232 | ||
233 | err = ipv6_dev_mc_inc(dev, addr); | |
234 | ||
235 | if (err) { | |
236 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); | |
237 | dev_put(dev); | |
238 | return err; | |
239 | } | |
240 | ||
241 | write_lock_bh(&ipv6_sk_mc_lock); | |
242 | mc_lst->next = np->ipv6_mc_list; | |
243 | np->ipv6_mc_list = mc_lst; | |
244 | write_unlock_bh(&ipv6_sk_mc_lock); | |
245 | ||
246 | dev_put(dev); | |
247 | ||
248 | return 0; | |
249 | } | |
250 | ||
251 | /* | |
252 | * socket leave on multicast group | |
253 | */ | |
254 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, struct in6_addr *addr) | |
255 | { | |
256 | struct ipv6_pinfo *np = inet6_sk(sk); | |
257 | struct ipv6_mc_socklist *mc_lst, **lnk; | |
b8ad0cbc | 258 | struct net *net = sk->sk_net; |
1da177e4 LT |
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 | ||
b8ad0cbc DL |
269 | dev = dev_get_by_index(net, mc_lst->ifindex); |
270 | if (dev != NULL) { | |
1da177e4 LT |
271 | struct inet6_dev *idev = in6_dev_get(dev); |
272 | ||
acd6e00b | 273 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
1da177e4 | 274 | if (idev) { |
1da177e4 LT |
275 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
276 | in6_dev_put(idev); | |
277 | } | |
278 | dev_put(dev); | |
acd6e00b DS |
279 | } else |
280 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
1da177e4 LT |
281 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); |
282 | return 0; | |
283 | } | |
284 | } | |
285 | write_unlock_bh(&ipv6_sk_mc_lock); | |
286 | ||
9951f036 | 287 | return -EADDRNOTAVAIL; |
1da177e4 LT |
288 | } |
289 | ||
b8ad0cbc DL |
290 | static struct inet6_dev *ip6_mc_find_dev(struct net *net, |
291 | struct in6_addr *group, | |
292 | int ifindex) | |
1da177e4 LT |
293 | { |
294 | struct net_device *dev = NULL; | |
295 | struct inet6_dev *idev = NULL; | |
296 | ||
297 | if (ifindex == 0) { | |
298 | struct rt6_info *rt; | |
299 | ||
b8ad0cbc | 300 | rt = rt6_lookup(net, group, NULL, 0, 0); |
1da177e4 LT |
301 | if (rt) { |
302 | dev = rt->rt6i_dev; | |
303 | dev_hold(dev); | |
304 | dst_release(&rt->u.dst); | |
305 | } | |
306 | } else | |
b8ad0cbc | 307 | dev = dev_get_by_index(net, ifindex); |
1da177e4 LT |
308 | |
309 | if (!dev) | |
310 | return NULL; | |
311 | idev = in6_dev_get(dev); | |
312 | if (!idev) { | |
313 | dev_put(dev); | |
314 | return NULL; | |
315 | } | |
316 | read_lock_bh(&idev->lock); | |
317 | if (idev->dead) { | |
318 | read_unlock_bh(&idev->lock); | |
319 | in6_dev_put(idev); | |
320 | dev_put(dev); | |
321 | return NULL; | |
322 | } | |
323 | return idev; | |
324 | } | |
325 | ||
326 | void ipv6_sock_mc_close(struct sock *sk) | |
327 | { | |
328 | struct ipv6_pinfo *np = inet6_sk(sk); | |
329 | struct ipv6_mc_socklist *mc_lst; | |
b8ad0cbc | 330 | struct net *net = sk->sk_net; |
1da177e4 LT |
331 | |
332 | write_lock_bh(&ipv6_sk_mc_lock); | |
333 | while ((mc_lst = np->ipv6_mc_list) != NULL) { | |
334 | struct net_device *dev; | |
335 | ||
336 | np->ipv6_mc_list = mc_lst->next; | |
337 | write_unlock_bh(&ipv6_sk_mc_lock); | |
338 | ||
b8ad0cbc | 339 | dev = dev_get_by_index(net, mc_lst->ifindex); |
1da177e4 LT |
340 | if (dev) { |
341 | struct inet6_dev *idev = in6_dev_get(dev); | |
342 | ||
acd6e00b | 343 | (void) ip6_mc_leave_src(sk, mc_lst, idev); |
1da177e4 | 344 | if (idev) { |
1da177e4 LT |
345 | __ipv6_dev_mc_dec(idev, &mc_lst->addr); |
346 | in6_dev_put(idev); | |
347 | } | |
348 | dev_put(dev); | |
acd6e00b DS |
349 | } else |
350 | (void) ip6_mc_leave_src(sk, mc_lst, NULL); | |
1da177e4 LT |
351 | |
352 | sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); | |
353 | ||
354 | write_lock_bh(&ipv6_sk_mc_lock); | |
355 | } | |
356 | write_unlock_bh(&ipv6_sk_mc_lock); | |
357 | } | |
358 | ||
359 | int ip6_mc_source(int add, int omode, struct sock *sk, | |
360 | struct group_source_req *pgsr) | |
361 | { | |
362 | struct in6_addr *source, *group; | |
363 | struct ipv6_mc_socklist *pmc; | |
364 | struct net_device *dev; | |
365 | struct inet6_dev *idev; | |
366 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
367 | struct ip6_sf_socklist *psl; | |
b8ad0cbc | 368 | struct net *net = sk->sk_net; |
1da177e4 | 369 | int i, j, rv; |
c9e3e8b6 | 370 | int leavegroup = 0; |
5ab4a6c8 | 371 | int pmclocked = 0; |
1da177e4 LT |
372 | int err; |
373 | ||
374 | if (pgsr->gsr_group.ss_family != AF_INET6 || | |
375 | pgsr->gsr_source.ss_family != AF_INET6) | |
376 | return -EINVAL; | |
377 | ||
378 | source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr; | |
379 | group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr; | |
380 | ||
381 | if (!ipv6_addr_is_multicast(group)) | |
382 | return -EINVAL; | |
383 | ||
b8ad0cbc | 384 | idev = ip6_mc_find_dev(net, group, pgsr->gsr_interface); |
1da177e4 LT |
385 | if (!idev) |
386 | return -ENODEV; | |
387 | dev = idev->dev; | |
388 | ||
389 | err = -EADDRNOTAVAIL; | |
390 | ||
c9e3e8b6 | 391 | read_lock_bh(&ipv6_sk_mc_lock); |
1da177e4 LT |
392 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { |
393 | if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface) | |
394 | continue; | |
395 | if (ipv6_addr_equal(&pmc->addr, group)) | |
396 | break; | |
397 | } | |
917f2f10 DS |
398 | if (!pmc) { /* must have a prior join */ |
399 | err = -EINVAL; | |
1da177e4 | 400 | goto done; |
917f2f10 | 401 | } |
1da177e4 LT |
402 | /* if a source filter was set, must be the same mode as before */ |
403 | if (pmc->sflist) { | |
917f2f10 DS |
404 | if (pmc->sfmode != omode) { |
405 | err = -EINVAL; | |
1da177e4 | 406 | goto done; |
917f2f10 | 407 | } |
1da177e4 LT |
408 | } else if (pmc->sfmode != omode) { |
409 | /* allow mode switches for empty-set filters */ | |
410 | ip6_mc_add_src(idev, group, omode, 0, NULL, 0); | |
411 | ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
412 | pmc->sfmode = omode; | |
413 | } | |
414 | ||
5ab4a6c8 DS |
415 | write_lock_bh(&pmc->sflock); |
416 | pmclocked = 1; | |
417 | ||
1da177e4 LT |
418 | psl = pmc->sflist; |
419 | if (!add) { | |
420 | if (!psl) | |
917f2f10 | 421 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 LT |
422 | rv = !0; |
423 | for (i=0; i<psl->sl_count; i++) { | |
424 | rv = memcmp(&psl->sl_addr[i], source, | |
425 | sizeof(struct in6_addr)); | |
426 | if (rv == 0) | |
427 | break; | |
428 | } | |
429 | if (rv) /* source not found */ | |
917f2f10 | 430 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 431 | |
c9e3e8b6 DS |
432 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
433 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { | |
434 | leavegroup = 1; | |
435 | goto done; | |
436 | } | |
437 | ||
1da177e4 LT |
438 | /* update the interface filter */ |
439 | ip6_mc_del_src(idev, group, omode, 1, source, 1); | |
440 | ||
441 | for (j=i+1; j<psl->sl_count; j++) | |
442 | psl->sl_addr[j-1] = psl->sl_addr[j]; | |
443 | psl->sl_count--; | |
444 | err = 0; | |
445 | goto done; | |
446 | } | |
447 | /* else, add a new source to the filter */ | |
448 | ||
449 | if (psl && psl->sl_count >= sysctl_mld_max_msf) { | |
450 | err = -ENOBUFS; | |
451 | goto done; | |
452 | } | |
453 | if (!psl || psl->sl_count == psl->sl_max) { | |
454 | struct ip6_sf_socklist *newpsl; | |
455 | int count = IP6_SFBLOCK; | |
456 | ||
457 | if (psl) | |
458 | count += psl->sl_max; | |
8b3a7005 | 459 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_ATOMIC); |
1da177e4 LT |
460 | if (!newpsl) { |
461 | err = -ENOBUFS; | |
462 | goto done; | |
463 | } | |
464 | newpsl->sl_max = count; | |
465 | newpsl->sl_count = count - IP6_SFBLOCK; | |
466 | if (psl) { | |
467 | for (i=0; i<psl->sl_count; i++) | |
468 | newpsl->sl_addr[i] = psl->sl_addr[i]; | |
469 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
470 | } | |
471 | pmc->sflist = psl = newpsl; | |
472 | } | |
473 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ | |
474 | for (i=0; i<psl->sl_count; i++) { | |
475 | rv = memcmp(&psl->sl_addr[i], source, sizeof(struct in6_addr)); | |
476 | if (rv == 0) | |
477 | break; | |
478 | } | |
479 | if (rv == 0) /* address already there is an error */ | |
480 | goto done; | |
481 | for (j=psl->sl_count-1; j>=i; j--) | |
482 | psl->sl_addr[j+1] = psl->sl_addr[j]; | |
483 | psl->sl_addr[i] = *source; | |
484 | psl->sl_count++; | |
485 | err = 0; | |
486 | /* update the interface list */ | |
487 | ip6_mc_add_src(idev, group, omode, 1, source, 1); | |
488 | done: | |
5ab4a6c8 DS |
489 | if (pmclocked) |
490 | write_unlock_bh(&pmc->sflock); | |
c9e3e8b6 | 491 | read_unlock_bh(&ipv6_sk_mc_lock); |
1da177e4 LT |
492 | read_unlock_bh(&idev->lock); |
493 | in6_dev_put(idev); | |
494 | dev_put(dev); | |
c9e3e8b6 DS |
495 | if (leavegroup) |
496 | return ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group); | |
1da177e4 LT |
497 | return err; |
498 | } | |
499 | ||
500 | int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf) | |
501 | { | |
502 | struct in6_addr *group; | |
503 | struct ipv6_mc_socklist *pmc; | |
504 | struct net_device *dev; | |
505 | struct inet6_dev *idev; | |
506 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
507 | struct ip6_sf_socklist *newpsl, *psl; | |
b8ad0cbc | 508 | struct net *net = sk->sk_net; |
9951f036 | 509 | int leavegroup = 0; |
1da177e4 LT |
510 | int i, err; |
511 | ||
512 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
513 | ||
514 | if (!ipv6_addr_is_multicast(group)) | |
515 | return -EINVAL; | |
516 | if (gsf->gf_fmode != MCAST_INCLUDE && | |
517 | gsf->gf_fmode != MCAST_EXCLUDE) | |
518 | return -EINVAL; | |
519 | ||
b8ad0cbc | 520 | idev = ip6_mc_find_dev(net, group, gsf->gf_interface); |
1da177e4 LT |
521 | |
522 | if (!idev) | |
523 | return -ENODEV; | |
524 | dev = idev->dev; | |
1da177e4 | 525 | |
9c05989b | 526 | err = 0; |
5ab4a6c8 DS |
527 | read_lock_bh(&ipv6_sk_mc_lock); |
528 | ||
9951f036 DS |
529 | if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) { |
530 | leavegroup = 1; | |
531 | goto done; | |
532 | } | |
533 | ||
1da177e4 LT |
534 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { |
535 | if (pmc->ifindex != gsf->gf_interface) | |
536 | continue; | |
537 | if (ipv6_addr_equal(&pmc->addr, group)) | |
538 | break; | |
539 | } | |
917f2f10 DS |
540 | if (!pmc) { /* must have a prior join */ |
541 | err = -EINVAL; | |
1da177e4 | 542 | goto done; |
917f2f10 | 543 | } |
1da177e4 | 544 | if (gsf->gf_numsrc) { |
8b3a7005 KK |
545 | newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc), |
546 | GFP_ATOMIC); | |
1da177e4 LT |
547 | if (!newpsl) { |
548 | err = -ENOBUFS; | |
549 | goto done; | |
550 | } | |
551 | newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc; | |
552 | for (i=0; i<newpsl->sl_count; ++i) { | |
553 | struct sockaddr_in6 *psin6; | |
554 | ||
555 | psin6 = (struct sockaddr_in6 *)&gsf->gf_slist[i]; | |
556 | newpsl->sl_addr[i] = psin6->sin6_addr; | |
557 | } | |
558 | err = ip6_mc_add_src(idev, group, gsf->gf_fmode, | |
559 | newpsl->sl_count, newpsl->sl_addr, 0); | |
560 | if (err) { | |
561 | sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max)); | |
562 | goto done; | |
563 | } | |
8713dbf0 | 564 | } else { |
1da177e4 | 565 | newpsl = NULL; |
8713dbf0 YZ |
566 | (void) ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0); |
567 | } | |
5ab4a6c8 DS |
568 | |
569 | write_lock_bh(&pmc->sflock); | |
1da177e4 LT |
570 | psl = pmc->sflist; |
571 | if (psl) { | |
572 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, | |
573 | psl->sl_count, psl->sl_addr, 0); | |
574 | sock_kfree_s(sk, psl, IP6_SFLSIZE(psl->sl_max)); | |
575 | } else | |
576 | (void) ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0); | |
577 | pmc->sflist = newpsl; | |
578 | pmc->sfmode = gsf->gf_fmode; | |
5ab4a6c8 | 579 | write_unlock_bh(&pmc->sflock); |
917f2f10 | 580 | err = 0; |
1da177e4 | 581 | done: |
5ab4a6c8 | 582 | read_unlock_bh(&ipv6_sk_mc_lock); |
1da177e4 LT |
583 | read_unlock_bh(&idev->lock); |
584 | in6_dev_put(idev); | |
585 | dev_put(dev); | |
9951f036 DS |
586 | if (leavegroup) |
587 | err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group); | |
1da177e4 LT |
588 | return err; |
589 | } | |
590 | ||
591 | int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf, | |
592 | struct group_filter __user *optval, int __user *optlen) | |
593 | { | |
594 | int err, i, count, copycount; | |
595 | struct in6_addr *group; | |
596 | struct ipv6_mc_socklist *pmc; | |
597 | struct inet6_dev *idev; | |
598 | struct net_device *dev; | |
599 | struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
600 | struct ip6_sf_socklist *psl; | |
b8ad0cbc | 601 | struct net *net = sk->sk_net; |
1da177e4 LT |
602 | |
603 | group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr; | |
604 | ||
605 | if (!ipv6_addr_is_multicast(group)) | |
606 | return -EINVAL; | |
607 | ||
b8ad0cbc | 608 | idev = ip6_mc_find_dev(net, group, gsf->gf_interface); |
1da177e4 LT |
609 | |
610 | if (!idev) | |
611 | return -ENODEV; | |
612 | ||
613 | dev = idev->dev; | |
614 | ||
615 | err = -EADDRNOTAVAIL; | |
5ab4a6c8 DS |
616 | /* |
617 | * changes to the ipv6_mc_list require the socket lock and | |
618 | * a read lock on ip6_sk_mc_lock. We have the socket lock, | |
619 | * so reading the list is safe. | |
620 | */ | |
1da177e4 LT |
621 | |
622 | for (pmc=inet6->ipv6_mc_list; pmc; pmc=pmc->next) { | |
623 | if (pmc->ifindex != gsf->gf_interface) | |
624 | continue; | |
625 | if (ipv6_addr_equal(group, &pmc->addr)) | |
626 | break; | |
627 | } | |
628 | if (!pmc) /* must have a prior join */ | |
629 | goto done; | |
630 | gsf->gf_fmode = pmc->sfmode; | |
631 | psl = pmc->sflist; | |
632 | count = psl ? psl->sl_count : 0; | |
633 | read_unlock_bh(&idev->lock); | |
634 | in6_dev_put(idev); | |
635 | dev_put(dev); | |
636 | ||
637 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; | |
638 | gsf->gf_numsrc = count; | |
639 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || | |
640 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { | |
641 | return -EFAULT; | |
642 | } | |
5ab4a6c8 DS |
643 | /* changes to psl require the socket lock, a read lock on |
644 | * on ipv6_sk_mc_lock and a write lock on pmc->sflock. We | |
645 | * have the socket lock, so reading here is safe. | |
646 | */ | |
1da177e4 LT |
647 | for (i=0; i<copycount; i++) { |
648 | struct sockaddr_in6 *psin6; | |
649 | struct sockaddr_storage ss; | |
650 | ||
651 | psin6 = (struct sockaddr_in6 *)&ss; | |
652 | memset(&ss, 0, sizeof(ss)); | |
653 | psin6->sin6_family = AF_INET6; | |
654 | psin6->sin6_addr = psl->sl_addr[i]; | |
1ab1457c | 655 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) |
1da177e4 LT |
656 | return -EFAULT; |
657 | } | |
658 | return 0; | |
659 | done: | |
660 | read_unlock_bh(&idev->lock); | |
661 | in6_dev_put(idev); | |
662 | dev_put(dev); | |
663 | return err; | |
664 | } | |
665 | ||
666 | int inet6_mc_check(struct sock *sk, struct in6_addr *mc_addr, | |
667 | struct in6_addr *src_addr) | |
668 | { | |
669 | struct ipv6_pinfo *np = inet6_sk(sk); | |
670 | struct ipv6_mc_socklist *mc; | |
671 | struct ip6_sf_socklist *psl; | |
672 | int rv = 1; | |
673 | ||
674 | read_lock(&ipv6_sk_mc_lock); | |
675 | for (mc = np->ipv6_mc_list; mc; mc = mc->next) { | |
676 | if (ipv6_addr_equal(&mc->addr, mc_addr)) | |
677 | break; | |
678 | } | |
679 | if (!mc) { | |
680 | read_unlock(&ipv6_sk_mc_lock); | |
681 | return 1; | |
682 | } | |
5ab4a6c8 | 683 | read_lock(&mc->sflock); |
1da177e4 LT |
684 | psl = mc->sflist; |
685 | if (!psl) { | |
686 | rv = mc->sfmode == MCAST_EXCLUDE; | |
687 | } else { | |
688 | int i; | |
689 | ||
690 | for (i=0; i<psl->sl_count; i++) { | |
691 | if (ipv6_addr_equal(&psl->sl_addr[i], src_addr)) | |
692 | break; | |
693 | } | |
694 | if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) | |
695 | rv = 0; | |
696 | if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) | |
697 | rv = 0; | |
698 | } | |
5ab4a6c8 | 699 | read_unlock(&mc->sflock); |
1da177e4 LT |
700 | read_unlock(&ipv6_sk_mc_lock); |
701 | ||
702 | return rv; | |
703 | } | |
704 | ||
705 | static void ma_put(struct ifmcaddr6 *mc) | |
706 | { | |
707 | if (atomic_dec_and_test(&mc->mca_refcnt)) { | |
708 | in6_dev_put(mc->idev); | |
709 | kfree(mc); | |
710 | } | |
711 | } | |
712 | ||
713 | static void igmp6_group_added(struct ifmcaddr6 *mc) | |
714 | { | |
715 | struct net_device *dev = mc->idev->dev; | |
716 | char buf[MAX_ADDR_LEN]; | |
717 | ||
718 | spin_lock_bh(&mc->mca_lock); | |
719 | if (!(mc->mca_flags&MAF_LOADED)) { | |
720 | mc->mca_flags |= MAF_LOADED; | |
721 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
722 | dev_mc_add(dev, buf, dev->addr_len, 0); | |
723 | } | |
724 | spin_unlock_bh(&mc->mca_lock); | |
725 | ||
726 | if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT)) | |
727 | return; | |
728 | ||
729 | if (MLD_V1_SEEN(mc->idev)) { | |
730 | igmp6_join_group(mc); | |
731 | return; | |
732 | } | |
733 | /* else v2 */ | |
734 | ||
735 | mc->mca_crcount = mc->idev->mc_qrv; | |
736 | mld_ifc_event(mc->idev); | |
737 | } | |
738 | ||
739 | static void igmp6_group_dropped(struct ifmcaddr6 *mc) | |
740 | { | |
741 | struct net_device *dev = mc->idev->dev; | |
742 | char buf[MAX_ADDR_LEN]; | |
743 | ||
744 | spin_lock_bh(&mc->mca_lock); | |
745 | if (mc->mca_flags&MAF_LOADED) { | |
746 | mc->mca_flags &= ~MAF_LOADED; | |
747 | if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0) | |
748 | dev_mc_delete(dev, buf, dev->addr_len, 0); | |
749 | } | |
750 | ||
751 | if (mc->mca_flags & MAF_NOREPORT) | |
752 | goto done; | |
753 | spin_unlock_bh(&mc->mca_lock); | |
754 | ||
755 | if (!mc->idev->dead) | |
756 | igmp6_leave_group(mc); | |
757 | ||
758 | spin_lock_bh(&mc->mca_lock); | |
759 | if (del_timer(&mc->mca_timer)) | |
760 | atomic_dec(&mc->mca_refcnt); | |
761 | done: | |
762 | ip6_mc_clear_src(mc); | |
763 | spin_unlock_bh(&mc->mca_lock); | |
764 | } | |
765 | ||
766 | /* | |
767 | * deleted ifmcaddr6 manipulation | |
768 | */ | |
769 | static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im) | |
770 | { | |
771 | struct ifmcaddr6 *pmc; | |
772 | ||
773 | /* this is an "ifmcaddr6" for convenience; only the fields below | |
774 | * are actually used. In particular, the refcnt and users are not | |
775 | * used for management of the delete list. Using the same structure | |
776 | * for deleted items allows change reports to use common code with | |
777 | * non-deleted or query-response MCA's. | |
778 | */ | |
0c600eda | 779 | pmc = kzalloc(sizeof(*pmc), GFP_ATOMIC); |
1da177e4 LT |
780 | if (!pmc) |
781 | return; | |
0c600eda | 782 | |
1da177e4 LT |
783 | spin_lock_bh(&im->mca_lock); |
784 | spin_lock_init(&pmc->mca_lock); | |
785 | pmc->idev = im->idev; | |
786 | in6_dev_hold(idev); | |
787 | pmc->mca_addr = im->mca_addr; | |
788 | pmc->mca_crcount = idev->mc_qrv; | |
789 | pmc->mca_sfmode = im->mca_sfmode; | |
790 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
791 | struct ip6_sf_list *psf; | |
792 | ||
793 | pmc->mca_tomb = im->mca_tomb; | |
794 | pmc->mca_sources = im->mca_sources; | |
795 | im->mca_tomb = im->mca_sources = NULL; | |
796 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) | |
797 | psf->sf_crcount = pmc->mca_crcount; | |
798 | } | |
799 | spin_unlock_bh(&im->mca_lock); | |
800 | ||
801 | write_lock_bh(&idev->mc_lock); | |
802 | pmc->next = idev->mc_tomb; | |
803 | idev->mc_tomb = pmc; | |
804 | write_unlock_bh(&idev->mc_lock); | |
805 | } | |
806 | ||
807 | static void mld_del_delrec(struct inet6_dev *idev, struct in6_addr *pmca) | |
808 | { | |
809 | struct ifmcaddr6 *pmc, *pmc_prev; | |
810 | struct ip6_sf_list *psf, *psf_next; | |
811 | ||
812 | write_lock_bh(&idev->mc_lock); | |
813 | pmc_prev = NULL; | |
814 | for (pmc=idev->mc_tomb; pmc; pmc=pmc->next) { | |
815 | if (ipv6_addr_equal(&pmc->mca_addr, pmca)) | |
816 | break; | |
817 | pmc_prev = pmc; | |
818 | } | |
819 | if (pmc) { | |
820 | if (pmc_prev) | |
821 | pmc_prev->next = pmc->next; | |
822 | else | |
823 | idev->mc_tomb = pmc->next; | |
824 | } | |
825 | write_unlock_bh(&idev->mc_lock); | |
826 | if (pmc) { | |
827 | for (psf=pmc->mca_tomb; psf; psf=psf_next) { | |
828 | psf_next = psf->sf_next; | |
829 | kfree(psf); | |
830 | } | |
831 | in6_dev_put(pmc->idev); | |
832 | kfree(pmc); | |
833 | } | |
834 | } | |
835 | ||
836 | static void mld_clear_delrec(struct inet6_dev *idev) | |
837 | { | |
838 | struct ifmcaddr6 *pmc, *nextpmc; | |
839 | ||
840 | write_lock_bh(&idev->mc_lock); | |
841 | pmc = idev->mc_tomb; | |
842 | idev->mc_tomb = NULL; | |
843 | write_unlock_bh(&idev->mc_lock); | |
844 | ||
845 | for (; pmc; pmc = nextpmc) { | |
846 | nextpmc = pmc->next; | |
847 | ip6_mc_clear_src(pmc); | |
848 | in6_dev_put(pmc->idev); | |
849 | kfree(pmc); | |
850 | } | |
851 | ||
852 | /* clear dead sources, too */ | |
853 | read_lock_bh(&idev->lock); | |
854 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
855 | struct ip6_sf_list *psf, *psf_next; | |
856 | ||
857 | spin_lock_bh(&pmc->mca_lock); | |
858 | psf = pmc->mca_tomb; | |
859 | pmc->mca_tomb = NULL; | |
860 | spin_unlock_bh(&pmc->mca_lock); | |
861 | for (; psf; psf=psf_next) { | |
862 | psf_next = psf->sf_next; | |
863 | kfree(psf); | |
864 | } | |
865 | } | |
866 | read_unlock_bh(&idev->lock); | |
867 | } | |
868 | ||
869 | ||
870 | /* | |
871 | * device multicast group inc (add if not found) | |
872 | */ | |
873 | int ipv6_dev_mc_inc(struct net_device *dev, struct in6_addr *addr) | |
874 | { | |
875 | struct ifmcaddr6 *mc; | |
876 | struct inet6_dev *idev; | |
877 | ||
878 | idev = in6_dev_get(dev); | |
879 | ||
880 | if (idev == NULL) | |
881 | return -EINVAL; | |
882 | ||
883 | write_lock_bh(&idev->lock); | |
884 | if (idev->dead) { | |
885 | write_unlock_bh(&idev->lock); | |
886 | in6_dev_put(idev); | |
887 | return -ENODEV; | |
888 | } | |
889 | ||
890 | for (mc = idev->mc_list; mc; mc = mc->next) { | |
891 | if (ipv6_addr_equal(&mc->mca_addr, addr)) { | |
892 | mc->mca_users++; | |
893 | write_unlock_bh(&idev->lock); | |
894 | ip6_mc_add_src(idev, &mc->mca_addr, MCAST_EXCLUDE, 0, | |
895 | NULL, 0); | |
896 | in6_dev_put(idev); | |
897 | return 0; | |
898 | } | |
899 | } | |
900 | ||
901 | /* | |
902 | * not found: create a new one. | |
903 | */ | |
904 | ||
0c600eda | 905 | mc = kzalloc(sizeof(struct ifmcaddr6), GFP_ATOMIC); |
1da177e4 LT |
906 | |
907 | if (mc == NULL) { | |
908 | write_unlock_bh(&idev->lock); | |
909 | in6_dev_put(idev); | |
910 | return -ENOMEM; | |
911 | } | |
912 | ||
b24b8a24 | 913 | setup_timer(&mc->mca_timer, igmp6_timer_handler, (unsigned long)mc); |
1da177e4 LT |
914 | |
915 | ipv6_addr_copy(&mc->mca_addr, addr); | |
916 | mc->idev = idev; | |
917 | mc->mca_users = 1; | |
918 | /* mca_stamp should be updated upon changes */ | |
919 | mc->mca_cstamp = mc->mca_tstamp = jiffies; | |
920 | atomic_set(&mc->mca_refcnt, 2); | |
921 | spin_lock_init(&mc->mca_lock); | |
922 | ||
923 | /* initial mode is (EX, empty) */ | |
924 | mc->mca_sfmode = MCAST_EXCLUDE; | |
925 | mc->mca_sfcount[MCAST_EXCLUDE] = 1; | |
926 | ||
927 | if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) || | |
928 | IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
929 | mc->mca_flags |= MAF_NOREPORT; | |
930 | ||
931 | mc->next = idev->mc_list; | |
932 | idev->mc_list = mc; | |
933 | write_unlock_bh(&idev->lock); | |
934 | ||
935 | mld_del_delrec(idev, &mc->mca_addr); | |
936 | igmp6_group_added(mc); | |
937 | ma_put(mc); | |
938 | return 0; | |
939 | } | |
940 | ||
941 | /* | |
942 | * device multicast group del | |
943 | */ | |
944 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, struct in6_addr *addr) | |
945 | { | |
946 | struct ifmcaddr6 *ma, **map; | |
947 | ||
948 | write_lock_bh(&idev->lock); | |
949 | for (map = &idev->mc_list; (ma=*map) != NULL; map = &ma->next) { | |
950 | if (ipv6_addr_equal(&ma->mca_addr, addr)) { | |
951 | if (--ma->mca_users == 0) { | |
952 | *map = ma->next; | |
953 | write_unlock_bh(&idev->lock); | |
954 | ||
955 | igmp6_group_dropped(ma); | |
956 | ||
957 | ma_put(ma); | |
958 | return 0; | |
959 | } | |
960 | write_unlock_bh(&idev->lock); | |
961 | return 0; | |
962 | } | |
963 | } | |
964 | write_unlock_bh(&idev->lock); | |
965 | ||
966 | return -ENOENT; | |
967 | } | |
968 | ||
969 | int ipv6_dev_mc_dec(struct net_device *dev, struct in6_addr *addr) | |
970 | { | |
971 | struct inet6_dev *idev = in6_dev_get(dev); | |
972 | int err; | |
973 | ||
974 | if (!idev) | |
975 | return -ENODEV; | |
976 | ||
977 | err = __ipv6_dev_mc_dec(idev, addr); | |
978 | ||
979 | in6_dev_put(idev); | |
980 | ||
981 | return err; | |
982 | } | |
983 | ||
984 | /* | |
985 | * identify MLD packets for MLD filter exceptions | |
986 | */ | |
987 | int ipv6_is_mld(struct sk_buff *skb, int nexthdr) | |
988 | { | |
989 | struct icmp6hdr *pic; | |
990 | ||
991 | if (nexthdr != IPPROTO_ICMPV6) | |
992 | return 0; | |
993 | ||
994 | if (!pskb_may_pull(skb, sizeof(struct icmp6hdr))) | |
995 | return 0; | |
996 | ||
cc70ab26 | 997 | pic = icmp6_hdr(skb); |
1da177e4 LT |
998 | |
999 | switch (pic->icmp6_type) { | |
1000 | case ICMPV6_MGM_QUERY: | |
1001 | case ICMPV6_MGM_REPORT: | |
1002 | case ICMPV6_MGM_REDUCTION: | |
1003 | case ICMPV6_MLD2_REPORT: | |
1004 | return 1; | |
1005 | default: | |
1006 | break; | |
1007 | } | |
1008 | return 0; | |
1009 | } | |
1010 | ||
1011 | /* | |
1012 | * check if the interface/address pair is valid | |
1013 | */ | |
1014 | int ipv6_chk_mcast_addr(struct net_device *dev, struct in6_addr *group, | |
1015 | struct in6_addr *src_addr) | |
1016 | { | |
1017 | struct inet6_dev *idev; | |
1018 | struct ifmcaddr6 *mc; | |
1019 | int rv = 0; | |
1020 | ||
1021 | idev = in6_dev_get(dev); | |
1022 | if (idev) { | |
1023 | read_lock_bh(&idev->lock); | |
1024 | for (mc = idev->mc_list; mc; mc=mc->next) { | |
1025 | if (ipv6_addr_equal(&mc->mca_addr, group)) | |
1026 | break; | |
1027 | } | |
1028 | if (mc) { | |
1029 | if (src_addr && !ipv6_addr_any(src_addr)) { | |
1030 | struct ip6_sf_list *psf; | |
1031 | ||
1032 | spin_lock_bh(&mc->mca_lock); | |
1033 | for (psf=mc->mca_sources;psf;psf=psf->sf_next) { | |
1034 | if (ipv6_addr_equal(&psf->sf_addr, src_addr)) | |
1035 | break; | |
1036 | } | |
1037 | if (psf) | |
1038 | rv = psf->sf_count[MCAST_INCLUDE] || | |
1039 | psf->sf_count[MCAST_EXCLUDE] != | |
1040 | mc->mca_sfcount[MCAST_EXCLUDE]; | |
1041 | else | |
1042 | rv = mc->mca_sfcount[MCAST_EXCLUDE] !=0; | |
1043 | spin_unlock_bh(&mc->mca_lock); | |
1044 | } else | |
1045 | rv = 1; /* don't filter unspecified source */ | |
1046 | } | |
1047 | read_unlock_bh(&idev->lock); | |
1048 | in6_dev_put(idev); | |
1049 | } | |
1050 | return rv; | |
1051 | } | |
1052 | ||
1053 | static void mld_gq_start_timer(struct inet6_dev *idev) | |
1054 | { | |
1055 | int tv = net_random() % idev->mc_maxdelay; | |
1056 | ||
1057 | idev->mc_gq_running = 1; | |
1058 | if (!mod_timer(&idev->mc_gq_timer, jiffies+tv+2)) | |
1059 | in6_dev_hold(idev); | |
1060 | } | |
1061 | ||
1062 | static void mld_ifc_start_timer(struct inet6_dev *idev, int delay) | |
1063 | { | |
1064 | int tv = net_random() % delay; | |
1065 | ||
1066 | if (!mod_timer(&idev->mc_ifc_timer, jiffies+tv+2)) | |
1067 | in6_dev_hold(idev); | |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | * IGMP handling (alias multicast ICMPv6 messages) | |
1072 | */ | |
1073 | ||
1074 | static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime) | |
1075 | { | |
1076 | unsigned long delay = resptime; | |
1077 | ||
1078 | /* Do not start timer for these addresses */ | |
1079 | if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) || | |
1080 | IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) | |
1081 | return; | |
1082 | ||
1083 | if (del_timer(&ma->mca_timer)) { | |
1084 | atomic_dec(&ma->mca_refcnt); | |
1085 | delay = ma->mca_timer.expires - jiffies; | |
1086 | } | |
1087 | ||
1088 | if (delay >= resptime) { | |
1089 | if (resptime) | |
1090 | delay = net_random() % resptime; | |
1091 | else | |
1092 | delay = 1; | |
1093 | } | |
1094 | ma->mca_timer.expires = jiffies + delay; | |
1095 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
1096 | atomic_inc(&ma->mca_refcnt); | |
1097 | ma->mca_flags |= MAF_TIMER_RUNNING; | |
1098 | } | |
1099 | ||
5ab4a6c8 DS |
1100 | /* mark EXCLUDE-mode sources */ |
1101 | static int mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs, | |
1da177e4 LT |
1102 | struct in6_addr *srcs) |
1103 | { | |
1104 | struct ip6_sf_list *psf; | |
1105 | int i, scount; | |
1106 | ||
1107 | scount = 0; | |
1108 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1109 | if (scount == nsrcs) | |
1110 | break; | |
5ab4a6c8 DS |
1111 | for (i=0; i<nsrcs; i++) { |
1112 | /* skip inactive filters */ | |
1113 | if (pmc->mca_sfcount[MCAST_INCLUDE] || | |
1114 | pmc->mca_sfcount[MCAST_EXCLUDE] != | |
1115 | psf->sf_count[MCAST_EXCLUDE]) | |
1116 | continue; | |
1117 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { | |
1118 | scount++; | |
1119 | break; | |
1120 | } | |
1121 | } | |
1122 | } | |
1123 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1124 | if (scount == nsrcs) /* all sources excluded */ | |
1125 | return 0; | |
1126 | return 1; | |
1127 | } | |
1128 | ||
1129 | static int mld_marksources(struct ifmcaddr6 *pmc, int nsrcs, | |
1130 | struct in6_addr *srcs) | |
1131 | { | |
1132 | struct ip6_sf_list *psf; | |
1133 | int i, scount; | |
1134 | ||
1135 | if (pmc->mca_sfmode == MCAST_EXCLUDE) | |
1136 | return mld_xmarksources(pmc, nsrcs, srcs); | |
1137 | ||
1138 | /* mark INCLUDE-mode sources */ | |
1139 | ||
1140 | scount = 0; | |
1141 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1142 | if (scount == nsrcs) | |
1143 | break; | |
1144 | for (i=0; i<nsrcs; i++) { | |
1da177e4 LT |
1145 | if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) { |
1146 | psf->sf_gsresp = 1; | |
1147 | scount++; | |
1148 | break; | |
1149 | } | |
5ab4a6c8 DS |
1150 | } |
1151 | } | |
1152 | if (!scount) { | |
1153 | pmc->mca_flags &= ~MAF_GSQUERY; | |
1154 | return 0; | |
1da177e4 | 1155 | } |
5ab4a6c8 DS |
1156 | pmc->mca_flags |= MAF_GSQUERY; |
1157 | return 1; | |
1da177e4 LT |
1158 | } |
1159 | ||
1160 | int igmp6_event_query(struct sk_buff *skb) | |
1161 | { | |
97300b5f | 1162 | struct mld2_query *mlh2 = NULL; |
1da177e4 LT |
1163 | struct ifmcaddr6 *ma; |
1164 | struct in6_addr *group; | |
1165 | unsigned long max_delay; | |
1166 | struct inet6_dev *idev; | |
1167 | struct icmp6hdr *hdr; | |
1168 | int group_type; | |
1169 | int mark = 0; | |
1170 | int len; | |
1171 | ||
1172 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) | |
1173 | return -EINVAL; | |
1174 | ||
1175 | /* compute payload length excluding extension headers */ | |
0660e03f | 1176 | len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); |
cfe1fc77 | 1177 | len -= skb_network_header_len(skb); |
1da177e4 LT |
1178 | |
1179 | /* Drop queries with not link local source */ | |
0660e03f | 1180 | if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) |
1da177e4 LT |
1181 | return -EINVAL; |
1182 | ||
1183 | idev = in6_dev_get(skb->dev); | |
1184 | ||
1185 | if (idev == NULL) | |
1186 | return 0; | |
1187 | ||
cc70ab26 | 1188 | hdr = icmp6_hdr(skb); |
1da177e4 LT |
1189 | group = (struct in6_addr *) (hdr + 1); |
1190 | group_type = ipv6_addr_type(group); | |
1191 | ||
1192 | if (group_type != IPV6_ADDR_ANY && | |
1193 | !(group_type&IPV6_ADDR_MULTICAST)) { | |
1194 | in6_dev_put(idev); | |
1195 | return -EINVAL; | |
1196 | } | |
1197 | ||
1198 | if (len == 24) { | |
1199 | int switchback; | |
1200 | /* MLDv1 router present */ | |
1201 | ||
1202 | /* Translate milliseconds to jiffies */ | |
1203 | max_delay = (ntohs(hdr->icmp6_maxdelay)*HZ)/1000; | |
1204 | ||
1205 | switchback = (idev->mc_qrv + 1) * max_delay; | |
1206 | idev->mc_v1_seen = jiffies + switchback; | |
1207 | ||
1208 | /* cancel the interface change timer */ | |
1209 | idev->mc_ifc_count = 0; | |
1210 | if (del_timer(&idev->mc_ifc_timer)) | |
1211 | __in6_dev_put(idev); | |
1212 | /* clear deleted report items */ | |
1213 | mld_clear_delrec(idev); | |
1214 | } else if (len >= 28) { | |
1ab1457c | 1215 | int srcs_offset = sizeof(struct mld2_query) - |
97300b5f YZ |
1216 | sizeof(struct icmp6hdr); |
1217 | if (!pskb_may_pull(skb, srcs_offset)) { | |
1218 | in6_dev_put(idev); | |
1219 | return -EINVAL; | |
1220 | } | |
9c70220b | 1221 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
1da177e4 LT |
1222 | max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000; |
1223 | if (!max_delay) | |
1224 | max_delay = 1; | |
1225 | idev->mc_maxdelay = max_delay; | |
1226 | if (mlh2->qrv) | |
1227 | idev->mc_qrv = mlh2->qrv; | |
1228 | if (group_type == IPV6_ADDR_ANY) { /* general query */ | |
1229 | if (mlh2->nsrcs) { | |
1230 | in6_dev_put(idev); | |
1231 | return -EINVAL; /* no sources allowed */ | |
1232 | } | |
1233 | mld_gq_start_timer(idev); | |
1234 | in6_dev_put(idev); | |
1235 | return 0; | |
1236 | } | |
1237 | /* mark sources to include, if group & source-specific */ | |
97300b5f | 1238 | if (mlh2->nsrcs != 0) { |
1ab1457c | 1239 | if (!pskb_may_pull(skb, srcs_offset + |
5ab4a6c8 | 1240 | ntohs(mlh2->nsrcs) * sizeof(struct in6_addr))) { |
97300b5f YZ |
1241 | in6_dev_put(idev); |
1242 | return -EINVAL; | |
1243 | } | |
9c70220b | 1244 | mlh2 = (struct mld2_query *)skb_transport_header(skb); |
97300b5f YZ |
1245 | mark = 1; |
1246 | } | |
1da177e4 LT |
1247 | } else { |
1248 | in6_dev_put(idev); | |
1249 | return -EINVAL; | |
1250 | } | |
1251 | ||
1252 | read_lock_bh(&idev->lock); | |
1253 | if (group_type == IPV6_ADDR_ANY) { | |
1254 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
1255 | spin_lock_bh(&ma->mca_lock); | |
1256 | igmp6_group_queried(ma, max_delay); | |
1257 | spin_unlock_bh(&ma->mca_lock); | |
1258 | } | |
1259 | } else { | |
1260 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
7add2a43 | 1261 | if (!ipv6_addr_equal(group, &ma->mca_addr)) |
1da177e4 LT |
1262 | continue; |
1263 | spin_lock_bh(&ma->mca_lock); | |
1264 | if (ma->mca_flags & MAF_TIMER_RUNNING) { | |
1265 | /* gsquery <- gsquery && mark */ | |
1266 | if (!mark) | |
1267 | ma->mca_flags &= ~MAF_GSQUERY; | |
1268 | } else { | |
1269 | /* gsquery <- mark */ | |
1270 | if (mark) | |
1271 | ma->mca_flags |= MAF_GSQUERY; | |
1272 | else | |
1273 | ma->mca_flags &= ~MAF_GSQUERY; | |
1274 | } | |
5ab4a6c8 | 1275 | if (!(ma->mca_flags & MAF_GSQUERY) || |
7add2a43 | 1276 | mld_marksources(ma, ntohs(mlh2->nsrcs), mlh2->srcs)) |
5ab4a6c8 | 1277 | igmp6_group_queried(ma, max_delay); |
1da177e4 | 1278 | spin_unlock_bh(&ma->mca_lock); |
7add2a43 | 1279 | break; |
1da177e4 LT |
1280 | } |
1281 | } | |
1282 | read_unlock_bh(&idev->lock); | |
1283 | in6_dev_put(idev); | |
1284 | ||
1285 | return 0; | |
1286 | } | |
1287 | ||
1288 | ||
1289 | int igmp6_event_report(struct sk_buff *skb) | |
1290 | { | |
1291 | struct ifmcaddr6 *ma; | |
1292 | struct in6_addr *addrp; | |
1293 | struct inet6_dev *idev; | |
1294 | struct icmp6hdr *hdr; | |
1295 | int addr_type; | |
1296 | ||
1297 | /* Our own report looped back. Ignore it. */ | |
1298 | if (skb->pkt_type == PACKET_LOOPBACK) | |
1299 | return 0; | |
1300 | ||
24c69275 DS |
1301 | /* send our report if the MC router may not have heard this report */ |
1302 | if (skb->pkt_type != PACKET_MULTICAST && | |
1303 | skb->pkt_type != PACKET_BROADCAST) | |
1304 | return 0; | |
1305 | ||
1da177e4 LT |
1306 | if (!pskb_may_pull(skb, sizeof(struct in6_addr))) |
1307 | return -EINVAL; | |
1308 | ||
cc70ab26 | 1309 | hdr = icmp6_hdr(skb); |
1da177e4 LT |
1310 | |
1311 | /* Drop reports with not link local source */ | |
0660e03f | 1312 | addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr); |
1ab1457c | 1313 | if (addr_type != IPV6_ADDR_ANY && |
1da177e4 LT |
1314 | !(addr_type&IPV6_ADDR_LINKLOCAL)) |
1315 | return -EINVAL; | |
1316 | ||
1317 | addrp = (struct in6_addr *) (hdr + 1); | |
1318 | ||
1319 | idev = in6_dev_get(skb->dev); | |
1320 | if (idev == NULL) | |
1321 | return -ENODEV; | |
1322 | ||
1323 | /* | |
1324 | * Cancel the timer for this group | |
1325 | */ | |
1326 | ||
1327 | read_lock_bh(&idev->lock); | |
1328 | for (ma = idev->mc_list; ma; ma=ma->next) { | |
1329 | if (ipv6_addr_equal(&ma->mca_addr, addrp)) { | |
1330 | spin_lock(&ma->mca_lock); | |
1331 | if (del_timer(&ma->mca_timer)) | |
1332 | atomic_dec(&ma->mca_refcnt); | |
1333 | ma->mca_flags &= ~(MAF_LAST_REPORTER|MAF_TIMER_RUNNING); | |
1334 | spin_unlock(&ma->mca_lock); | |
1335 | break; | |
1336 | } | |
1337 | } | |
1338 | read_unlock_bh(&idev->lock); | |
1339 | in6_dev_put(idev); | |
1340 | return 0; | |
1341 | } | |
1342 | ||
1343 | static int is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type, | |
1344 | int gdeleted, int sdeleted) | |
1345 | { | |
1346 | switch (type) { | |
1347 | case MLD2_MODE_IS_INCLUDE: | |
1348 | case MLD2_MODE_IS_EXCLUDE: | |
1349 | if (gdeleted || sdeleted) | |
1350 | return 0; | |
5ab4a6c8 DS |
1351 | if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) { |
1352 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1353 | return 1; | |
1354 | /* don't include if this source is excluded | |
1355 | * in all filters | |
1356 | */ | |
1357 | if (psf->sf_count[MCAST_INCLUDE]) | |
7add2a43 | 1358 | return type == MLD2_MODE_IS_INCLUDE; |
5ab4a6c8 DS |
1359 | return pmc->mca_sfcount[MCAST_EXCLUDE] == |
1360 | psf->sf_count[MCAST_EXCLUDE]; | |
1361 | } | |
1362 | return 0; | |
1da177e4 LT |
1363 | case MLD2_CHANGE_TO_INCLUDE: |
1364 | if (gdeleted || sdeleted) | |
1365 | return 0; | |
1366 | return psf->sf_count[MCAST_INCLUDE] != 0; | |
1367 | case MLD2_CHANGE_TO_EXCLUDE: | |
1368 | if (gdeleted || sdeleted) | |
1369 | return 0; | |
1370 | if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 || | |
1371 | psf->sf_count[MCAST_INCLUDE]) | |
1372 | return 0; | |
1373 | return pmc->mca_sfcount[MCAST_EXCLUDE] == | |
1374 | psf->sf_count[MCAST_EXCLUDE]; | |
1375 | case MLD2_ALLOW_NEW_SOURCES: | |
1376 | if (gdeleted || !psf->sf_crcount) | |
1377 | return 0; | |
1378 | return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted; | |
1379 | case MLD2_BLOCK_OLD_SOURCES: | |
1380 | if (pmc->mca_sfmode == MCAST_INCLUDE) | |
1381 | return gdeleted || (psf->sf_crcount && sdeleted); | |
1382 | return psf->sf_crcount && !gdeleted && !sdeleted; | |
1383 | } | |
1384 | return 0; | |
1385 | } | |
1386 | ||
1387 | static int | |
1388 | mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted) | |
1389 | { | |
1390 | struct ip6_sf_list *psf; | |
1391 | int scount = 0; | |
1392 | ||
1393 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1394 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) | |
1395 | continue; | |
1396 | scount++; | |
1397 | } | |
1398 | return scount; | |
1399 | } | |
1400 | ||
1401 | static struct sk_buff *mld_newpack(struct net_device *dev, int size) | |
1402 | { | |
b8ad0cbc DL |
1403 | struct net *net = dev->nd_net; |
1404 | struct sock *sk = net->ipv6.igmp_sk; | |
1da177e4 LT |
1405 | struct sk_buff *skb; |
1406 | struct mld2_report *pmr; | |
1407 | struct in6_addr addr_buf; | |
1408 | int err; | |
1409 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1410 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1411 | IPV6_TLV_PADN, 0 }; | |
1412 | ||
1413 | /* we assume size > sizeof(ra) here */ | |
1414 | skb = sock_alloc_send_skb(sk, size + LL_RESERVED_SPACE(dev), 1, &err); | |
1415 | ||
cfcabdcc | 1416 | if (!skb) |
1da177e4 LT |
1417 | return NULL; |
1418 | ||
1419 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
1da177e4 | 1420 | |
95c385b4 | 1421 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1422 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1423 | * use unspecified address as the source address |
1da177e4 LT |
1424 | * when a valid link-local address is not available. |
1425 | */ | |
1426 | memset(&addr_buf, 0, sizeof(addr_buf)); | |
1427 | } | |
1428 | ||
1429 | ip6_nd_hdr(sk, skb, dev, &addr_buf, &mld2_all_mcr, NEXTHDR_HOP, 0); | |
1430 | ||
1431 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1432 | ||
27a884dc | 1433 | skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data); |
d10ba34b ACM |
1434 | skb_put(skb, sizeof(*pmr)); |
1435 | pmr = (struct mld2_report *)skb_transport_header(skb); | |
1da177e4 LT |
1436 | pmr->type = ICMPV6_MLD2_REPORT; |
1437 | pmr->resv1 = 0; | |
1438 | pmr->csum = 0; | |
1439 | pmr->resv2 = 0; | |
1440 | pmr->ngrec = 0; | |
1441 | return skb; | |
1442 | } | |
1443 | ||
1444 | static void mld_sendpack(struct sk_buff *skb) | |
1445 | { | |
0660e03f | 1446 | struct ipv6hdr *pip6 = ipv6_hdr(skb); |
9c70220b ACM |
1447 | struct mld2_report *pmr = |
1448 | (struct mld2_report *)skb_transport_header(skb); | |
1da177e4 LT |
1449 | int payload_len, mldlen; |
1450 | struct inet6_dev *idev = in6_dev_get(skb->dev); | |
b8ad0cbc | 1451 | struct net *net = skb->dev->nd_net; |
1da177e4 | 1452 | int err; |
41927178 | 1453 | struct flowi fl; |
1da177e4 | 1454 | |
a11d206d | 1455 | IP6_INC_STATS(idev, IPSTATS_MIB_OUTREQUESTS); |
27a884dc ACM |
1456 | payload_len = (skb->tail - skb->network_header) - sizeof(*pip6); |
1457 | mldlen = skb->tail - skb->transport_header; | |
1da177e4 LT |
1458 | pip6->payload_len = htons(payload_len); |
1459 | ||
1460 | pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen, | |
9c70220b ACM |
1461 | IPPROTO_ICMPV6, csum_partial(skb_transport_header(skb), |
1462 | mldlen, 0)); | |
41927178 YH |
1463 | |
1464 | skb->dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr); | |
1465 | ||
1466 | if (!skb->dst) { | |
1467 | err = -ENOMEM; | |
1468 | goto err_out; | |
1469 | } | |
1470 | ||
b8ad0cbc | 1471 | icmpv6_flow_init(net->ipv6.igmp_sk, &fl, ICMPV6_MLD2_REPORT, |
41927178 YH |
1472 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1473 | skb->dev->ifindex); | |
1474 | ||
1475 | err = xfrm_lookup(&skb->dst, &fl, NULL, 0); | |
1476 | if (err) | |
1477 | goto err_out; | |
1478 | ||
6e23ae2a | 1479 | err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
41927178 YH |
1480 | dst_output); |
1481 | out: | |
1da177e4 | 1482 | if (!err) { |
14878f75 DS |
1483 | ICMP6MSGOUT_INC_STATS_BH(idev, ICMPV6_MLD2_REPORT); |
1484 | ICMP6_INC_STATS_BH(idev, ICMP6_MIB_OUTMSGS); | |
1485 | IP6_INC_STATS_BH(idev, IPSTATS_MIB_OUTMCASTPKTS); | |
1da177e4 | 1486 | } else |
14878f75 | 1487 | IP6_INC_STATS_BH(idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 LT |
1488 | |
1489 | if (likely(idev != NULL)) | |
1490 | in6_dev_put(idev); | |
41927178 YH |
1491 | return; |
1492 | ||
1493 | err_out: | |
1494 | kfree_skb(skb); | |
1495 | goto out; | |
1da177e4 LT |
1496 | } |
1497 | ||
1498 | static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel) | |
1499 | { | |
fab10fe3 | 1500 | return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel); |
1da177e4 LT |
1501 | } |
1502 | ||
1503 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1504 | int type, struct mld2_grec **ppgr) | |
1505 | { | |
1506 | struct net_device *dev = pmc->idev->dev; | |
1507 | struct mld2_report *pmr; | |
1508 | struct mld2_grec *pgr; | |
1509 | ||
1510 | if (!skb) | |
1511 | skb = mld_newpack(dev, dev->mtu); | |
1512 | if (!skb) | |
1513 | return NULL; | |
1514 | pgr = (struct mld2_grec *)skb_put(skb, sizeof(struct mld2_grec)); | |
1515 | pgr->grec_type = type; | |
1516 | pgr->grec_auxwords = 0; | |
1517 | pgr->grec_nsrcs = 0; | |
1518 | pgr->grec_mca = pmc->mca_addr; /* structure copy */ | |
9c70220b | 1519 | pmr = (struct mld2_report *)skb_transport_header(skb); |
1da177e4 LT |
1520 | pmr->ngrec = htons(ntohs(pmr->ngrec)+1); |
1521 | *ppgr = pgr; | |
1522 | return skb; | |
1523 | } | |
1524 | ||
1525 | #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \ | |
1526 | skb_tailroom(skb)) : 0) | |
1527 | ||
1528 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc, | |
1529 | int type, int gdeleted, int sdeleted) | |
1530 | { | |
1531 | struct net_device *dev = pmc->idev->dev; | |
1532 | struct mld2_report *pmr; | |
1533 | struct mld2_grec *pgr = NULL; | |
1534 | struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list; | |
5ab4a6c8 | 1535 | int scount, stotal, first, isquery, truncate; |
1da177e4 LT |
1536 | |
1537 | if (pmc->mca_flags & MAF_NOREPORT) | |
1538 | return skb; | |
1539 | ||
1540 | isquery = type == MLD2_MODE_IS_INCLUDE || | |
1541 | type == MLD2_MODE_IS_EXCLUDE; | |
1542 | truncate = type == MLD2_MODE_IS_EXCLUDE || | |
1543 | type == MLD2_CHANGE_TO_EXCLUDE; | |
1544 | ||
5ab4a6c8 DS |
1545 | stotal = scount = 0; |
1546 | ||
1da177e4 LT |
1547 | psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources; |
1548 | ||
5ab4a6c8 DS |
1549 | if (!*psf_list) |
1550 | goto empty_source; | |
1551 | ||
9c70220b | 1552 | pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL; |
1da177e4 LT |
1553 | |
1554 | /* EX and TO_EX get a fresh packet, if needed */ | |
1555 | if (truncate) { | |
1556 | if (pmr && pmr->ngrec && | |
1557 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { | |
1558 | if (skb) | |
1559 | mld_sendpack(skb); | |
1560 | skb = mld_newpack(dev, dev->mtu); | |
1561 | } | |
1562 | } | |
1563 | first = 1; | |
1da177e4 LT |
1564 | psf_prev = NULL; |
1565 | for (psf=*psf_list; psf; psf=psf_next) { | |
1566 | struct in6_addr *psrc; | |
1567 | ||
1568 | psf_next = psf->sf_next; | |
1569 | ||
1570 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) { | |
1571 | psf_prev = psf; | |
1572 | continue; | |
1573 | } | |
1574 | ||
1575 | /* clear marks on query responses */ | |
1576 | if (isquery) | |
1577 | psf->sf_gsresp = 0; | |
1578 | ||
1579 | if (AVAILABLE(skb) < sizeof(*psrc) + | |
1580 | first*sizeof(struct mld2_grec)) { | |
1581 | if (truncate && !first) | |
1582 | break; /* truncate these */ | |
1583 | if (pgr) | |
1584 | pgr->grec_nsrcs = htons(scount); | |
1585 | if (skb) | |
1586 | mld_sendpack(skb); | |
1587 | skb = mld_newpack(dev, dev->mtu); | |
1588 | first = 1; | |
1589 | scount = 0; | |
1590 | } | |
1591 | if (first) { | |
1592 | skb = add_grhead(skb, pmc, type, &pgr); | |
1593 | first = 0; | |
1594 | } | |
cc63f70b AD |
1595 | if (!skb) |
1596 | return NULL; | |
1da177e4 LT |
1597 | psrc = (struct in6_addr *)skb_put(skb, sizeof(*psrc)); |
1598 | *psrc = psf->sf_addr; | |
5ab4a6c8 | 1599 | scount++; stotal++; |
1da177e4 LT |
1600 | if ((type == MLD2_ALLOW_NEW_SOURCES || |
1601 | type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) { | |
1602 | psf->sf_crcount--; | |
1603 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { | |
1604 | if (psf_prev) | |
1605 | psf_prev->sf_next = psf->sf_next; | |
1606 | else | |
1607 | *psf_list = psf->sf_next; | |
1608 | kfree(psf); | |
1609 | continue; | |
1610 | } | |
1611 | } | |
1612 | psf_prev = psf; | |
1613 | } | |
5ab4a6c8 DS |
1614 | |
1615 | empty_source: | |
1616 | if (!stotal) { | |
1617 | if (type == MLD2_ALLOW_NEW_SOURCES || | |
1618 | type == MLD2_BLOCK_OLD_SOURCES) | |
1619 | return skb; | |
1620 | if (pmc->mca_crcount || isquery) { | |
1621 | /* make sure we have room for group header */ | |
1622 | if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) { | |
1623 | mld_sendpack(skb); | |
1624 | skb = NULL; /* add_grhead will get a new one */ | |
1625 | } | |
1626 | skb = add_grhead(skb, pmc, type, &pgr); | |
1627 | } | |
1628 | } | |
1da177e4 LT |
1629 | if (pgr) |
1630 | pgr->grec_nsrcs = htons(scount); | |
1631 | ||
1632 | if (isquery) | |
1633 | pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */ | |
1634 | return skb; | |
1635 | } | |
1636 | ||
1637 | static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc) | |
1638 | { | |
1639 | struct sk_buff *skb = NULL; | |
1640 | int type; | |
1641 | ||
1642 | if (!pmc) { | |
1643 | read_lock_bh(&idev->lock); | |
1644 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1645 | if (pmc->mca_flags & MAF_NOREPORT) | |
1646 | continue; | |
1647 | spin_lock_bh(&pmc->mca_lock); | |
1648 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1649 | type = MLD2_MODE_IS_EXCLUDE; | |
1650 | else | |
1651 | type = MLD2_MODE_IS_INCLUDE; | |
1652 | skb = add_grec(skb, pmc, type, 0, 0); | |
1653 | spin_unlock_bh(&pmc->mca_lock); | |
1654 | } | |
1655 | read_unlock_bh(&idev->lock); | |
1656 | } else { | |
1657 | spin_lock_bh(&pmc->mca_lock); | |
1658 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
1659 | type = MLD2_MODE_IS_EXCLUDE; | |
1660 | else | |
1661 | type = MLD2_MODE_IS_INCLUDE; | |
1662 | skb = add_grec(skb, pmc, type, 0, 0); | |
1663 | spin_unlock_bh(&pmc->mca_lock); | |
1664 | } | |
1665 | if (skb) | |
1666 | mld_sendpack(skb); | |
1667 | } | |
1668 | ||
1669 | /* | |
1670 | * remove zero-count source records from a source filter list | |
1671 | */ | |
1672 | static void mld_clear_zeros(struct ip6_sf_list **ppsf) | |
1673 | { | |
1674 | struct ip6_sf_list *psf_prev, *psf_next, *psf; | |
1675 | ||
1676 | psf_prev = NULL; | |
1677 | for (psf=*ppsf; psf; psf = psf_next) { | |
1678 | psf_next = psf->sf_next; | |
1679 | if (psf->sf_crcount == 0) { | |
1680 | if (psf_prev) | |
1681 | psf_prev->sf_next = psf->sf_next; | |
1682 | else | |
1683 | *ppsf = psf->sf_next; | |
1684 | kfree(psf); | |
1685 | } else | |
1686 | psf_prev = psf; | |
1687 | } | |
1688 | } | |
1689 | ||
1690 | static void mld_send_cr(struct inet6_dev *idev) | |
1691 | { | |
1692 | struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next; | |
1693 | struct sk_buff *skb = NULL; | |
1694 | int type, dtype; | |
1695 | ||
1696 | read_lock_bh(&idev->lock); | |
1697 | write_lock_bh(&idev->mc_lock); | |
1698 | ||
1699 | /* deleted MCA's */ | |
1700 | pmc_prev = NULL; | |
1701 | for (pmc=idev->mc_tomb; pmc; pmc=pmc_next) { | |
1702 | pmc_next = pmc->next; | |
1703 | if (pmc->mca_sfmode == MCAST_INCLUDE) { | |
1704 | type = MLD2_BLOCK_OLD_SOURCES; | |
1705 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1706 | skb = add_grec(skb, pmc, type, 1, 0); | |
1707 | skb = add_grec(skb, pmc, dtype, 1, 1); | |
1708 | } | |
1709 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1710 | if (pmc->mca_sfmode == MCAST_EXCLUDE) { |
1711 | type = MLD2_CHANGE_TO_INCLUDE; | |
1712 | skb = add_grec(skb, pmc, type, 1, 0); | |
1713 | } | |
5ab4a6c8 | 1714 | pmc->mca_crcount--; |
1da177e4 LT |
1715 | if (pmc->mca_crcount == 0) { |
1716 | mld_clear_zeros(&pmc->mca_tomb); | |
1717 | mld_clear_zeros(&pmc->mca_sources); | |
1718 | } | |
1719 | } | |
1720 | if (pmc->mca_crcount == 0 && !pmc->mca_tomb && | |
1721 | !pmc->mca_sources) { | |
1722 | if (pmc_prev) | |
1723 | pmc_prev->next = pmc_next; | |
1724 | else | |
1725 | idev->mc_tomb = pmc_next; | |
1726 | in6_dev_put(pmc->idev); | |
1727 | kfree(pmc); | |
1728 | } else | |
1729 | pmc_prev = pmc; | |
1730 | } | |
1731 | write_unlock_bh(&idev->mc_lock); | |
1732 | ||
1733 | /* change recs */ | |
1734 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1735 | spin_lock_bh(&pmc->mca_lock); | |
1736 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1737 | type = MLD2_BLOCK_OLD_SOURCES; | |
1738 | dtype = MLD2_ALLOW_NEW_SOURCES; | |
1739 | } else { | |
1740 | type = MLD2_ALLOW_NEW_SOURCES; | |
1741 | dtype = MLD2_BLOCK_OLD_SOURCES; | |
1742 | } | |
1743 | skb = add_grec(skb, pmc, type, 0, 0); | |
1744 | skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */ | |
1745 | ||
1746 | /* filter mode changes */ | |
1747 | if (pmc->mca_crcount) { | |
1da177e4 LT |
1748 | if (pmc->mca_sfmode == MCAST_EXCLUDE) |
1749 | type = MLD2_CHANGE_TO_EXCLUDE; | |
1750 | else | |
1751 | type = MLD2_CHANGE_TO_INCLUDE; | |
1752 | skb = add_grec(skb, pmc, type, 0, 0); | |
5ab4a6c8 | 1753 | pmc->mca_crcount--; |
1da177e4 LT |
1754 | } |
1755 | spin_unlock_bh(&pmc->mca_lock); | |
1756 | } | |
1757 | read_unlock_bh(&idev->lock); | |
1758 | if (!skb) | |
1759 | return; | |
1760 | (void) mld_sendpack(skb); | |
1761 | } | |
1762 | ||
1763 | static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type) | |
1764 | { | |
b8ad0cbc DL |
1765 | struct net *net = dev->nd_net; |
1766 | struct sock *sk = net->ipv6.igmp_sk; | |
1da177e4 | 1767 | struct inet6_dev *idev; |
1ab1457c YH |
1768 | struct sk_buff *skb; |
1769 | struct icmp6hdr *hdr; | |
1da177e4 LT |
1770 | struct in6_addr *snd_addr; |
1771 | struct in6_addr *addrp; | |
1772 | struct in6_addr addr_buf; | |
1773 | struct in6_addr all_routers; | |
1774 | int err, len, payload_len, full_len; | |
1775 | u8 ra[8] = { IPPROTO_ICMPV6, 0, | |
1776 | IPV6_TLV_ROUTERALERT, 2, 0, 0, | |
1777 | IPV6_TLV_PADN, 0 }; | |
41927178 | 1778 | struct flowi fl; |
1da177e4 | 1779 | |
a11d206d YH |
1780 | rcu_read_lock(); |
1781 | IP6_INC_STATS(__in6_dev_get(dev), | |
1782 | IPSTATS_MIB_OUTREQUESTS); | |
1783 | rcu_read_unlock(); | |
1da177e4 LT |
1784 | snd_addr = addr; |
1785 | if (type == ICMPV6_MGM_REDUCTION) { | |
1786 | snd_addr = &all_routers; | |
1787 | ipv6_addr_all_routers(&all_routers); | |
1788 | } | |
1789 | ||
1790 | len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr); | |
1791 | payload_len = len + sizeof(ra); | |
1792 | full_len = sizeof(struct ipv6hdr) + payload_len; | |
1793 | ||
1794 | skb = sock_alloc_send_skb(sk, LL_RESERVED_SPACE(dev) + full_len, 1, &err); | |
1795 | ||
1796 | if (skb == NULL) { | |
a11d206d YH |
1797 | rcu_read_lock(); |
1798 | IP6_INC_STATS(__in6_dev_get(dev), | |
1799 | IPSTATS_MIB_OUTDISCARDS); | |
1800 | rcu_read_unlock(); | |
1da177e4 LT |
1801 | return; |
1802 | } | |
1803 | ||
1804 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
1da177e4 | 1805 | |
95c385b4 | 1806 | if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) { |
1da177e4 | 1807 | /* <draft-ietf-magma-mld-source-05.txt>: |
1ab1457c | 1808 | * use unspecified address as the source address |
1da177e4 LT |
1809 | * when a valid link-local address is not available. |
1810 | */ | |
1811 | memset(&addr_buf, 0, sizeof(addr_buf)); | |
1812 | } | |
1813 | ||
1814 | ip6_nd_hdr(sk, skb, dev, &addr_buf, snd_addr, NEXTHDR_HOP, payload_len); | |
1815 | ||
1816 | memcpy(skb_put(skb, sizeof(ra)), ra, sizeof(ra)); | |
1817 | ||
1818 | hdr = (struct icmp6hdr *) skb_put(skb, sizeof(struct icmp6hdr)); | |
1819 | memset(hdr, 0, sizeof(struct icmp6hdr)); | |
1820 | hdr->icmp6_type = type; | |
1821 | ||
1822 | addrp = (struct in6_addr *) skb_put(skb, sizeof(struct in6_addr)); | |
1823 | ipv6_addr_copy(addrp, addr); | |
1824 | ||
1825 | hdr->icmp6_cksum = csum_ipv6_magic(&addr_buf, snd_addr, len, | |
1826 | IPPROTO_ICMPV6, | |
1827 | csum_partial((__u8 *) hdr, len, 0)); | |
1828 | ||
1829 | idev = in6_dev_get(skb->dev); | |
1830 | ||
41927178 YH |
1831 | skb->dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr); |
1832 | if (!skb->dst) { | |
1833 | err = -ENOMEM; | |
1834 | goto err_out; | |
1835 | } | |
1836 | ||
b8ad0cbc | 1837 | icmpv6_flow_init(sk, &fl, type, |
41927178 YH |
1838 | &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, |
1839 | skb->dev->ifindex); | |
1840 | ||
1841 | err = xfrm_lookup(&skb->dst, &fl, NULL, 0); | |
1842 | if (err) | |
1843 | goto err_out; | |
1844 | ||
6e23ae2a | 1845 | err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev, |
41927178 YH |
1846 | dst_output); |
1847 | out: | |
1da177e4 | 1848 | if (!err) { |
14878f75 | 1849 | ICMP6MSGOUT_INC_STATS(idev, type); |
1da177e4 | 1850 | ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS); |
a11d206d | 1851 | IP6_INC_STATS(idev, IPSTATS_MIB_OUTMCASTPKTS); |
1da177e4 | 1852 | } else |
a11d206d | 1853 | IP6_INC_STATS(idev, IPSTATS_MIB_OUTDISCARDS); |
1da177e4 LT |
1854 | |
1855 | if (likely(idev != NULL)) | |
1856 | in6_dev_put(idev); | |
1857 | return; | |
41927178 YH |
1858 | |
1859 | err_out: | |
1860 | kfree_skb(skb); | |
1861 | goto out; | |
1da177e4 LT |
1862 | } |
1863 | ||
1864 | static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode, | |
1865 | struct in6_addr *psfsrc) | |
1866 | { | |
1867 | struct ip6_sf_list *psf, *psf_prev; | |
1868 | int rv = 0; | |
1869 | ||
1870 | psf_prev = NULL; | |
1871 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1872 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) | |
1873 | break; | |
1874 | psf_prev = psf; | |
1875 | } | |
1876 | if (!psf || psf->sf_count[sfmode] == 0) { | |
1877 | /* source filter not found, or count wrong => bug */ | |
1878 | return -ESRCH; | |
1879 | } | |
1880 | psf->sf_count[sfmode]--; | |
1881 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { | |
1882 | struct inet6_dev *idev = pmc->idev; | |
1883 | ||
1884 | /* no more filters for this source */ | |
1885 | if (psf_prev) | |
1886 | psf_prev->sf_next = psf->sf_next; | |
1887 | else | |
1888 | pmc->mca_sources = psf->sf_next; | |
1889 | if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) && | |
1890 | !MLD_V1_SEEN(idev)) { | |
1891 | psf->sf_crcount = idev->mc_qrv; | |
1892 | psf->sf_next = pmc->mca_tomb; | |
1893 | pmc->mca_tomb = psf; | |
1894 | rv = 1; | |
1895 | } else | |
1896 | kfree(psf); | |
1897 | } | |
1898 | return rv; | |
1899 | } | |
1900 | ||
1901 | static int ip6_mc_del_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
1902 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
1903 | int delta) | |
1904 | { | |
1905 | struct ifmcaddr6 *pmc; | |
1906 | int changerec = 0; | |
1907 | int i, err; | |
1908 | ||
1909 | if (!idev) | |
1910 | return -ENODEV; | |
1911 | read_lock_bh(&idev->lock); | |
1912 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
1913 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) | |
1914 | break; | |
1915 | } | |
1916 | if (!pmc) { | |
1917 | /* MCA not found?? bug */ | |
1918 | read_unlock_bh(&idev->lock); | |
1919 | return -ESRCH; | |
1920 | } | |
1921 | spin_lock_bh(&pmc->mca_lock); | |
1922 | sf_markstate(pmc); | |
1923 | if (!delta) { | |
1924 | if (!pmc->mca_sfcount[sfmode]) { | |
1925 | spin_unlock_bh(&pmc->mca_lock); | |
1926 | read_unlock_bh(&idev->lock); | |
1927 | return -EINVAL; | |
1928 | } | |
1929 | pmc->mca_sfcount[sfmode]--; | |
1930 | } | |
1931 | err = 0; | |
1932 | for (i=0; i<sfcount; i++) { | |
1933 | int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); | |
1934 | ||
1935 | changerec |= rv > 0; | |
1936 | if (!err && rv < 0) | |
1937 | err = rv; | |
1938 | } | |
1939 | if (pmc->mca_sfmode == MCAST_EXCLUDE && | |
1940 | pmc->mca_sfcount[MCAST_EXCLUDE] == 0 && | |
1941 | pmc->mca_sfcount[MCAST_INCLUDE]) { | |
1942 | struct ip6_sf_list *psf; | |
1943 | ||
1944 | /* filter mode change */ | |
1945 | pmc->mca_sfmode = MCAST_INCLUDE; | |
1946 | pmc->mca_crcount = idev->mc_qrv; | |
1947 | idev->mc_ifc_count = pmc->mca_crcount; | |
1948 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) | |
1949 | psf->sf_crcount = 0; | |
1950 | mld_ifc_event(pmc->idev); | |
1951 | } else if (sf_setstate(pmc) || changerec) | |
1952 | mld_ifc_event(pmc->idev); | |
1953 | spin_unlock_bh(&pmc->mca_lock); | |
1954 | read_unlock_bh(&idev->lock); | |
1955 | return err; | |
1956 | } | |
1957 | ||
1958 | /* | |
1959 | * Add multicast single-source filter to the interface list | |
1960 | */ | |
1961 | static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode, | |
1962 | struct in6_addr *psfsrc, int delta) | |
1963 | { | |
1964 | struct ip6_sf_list *psf, *psf_prev; | |
1965 | ||
1966 | psf_prev = NULL; | |
1967 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
1968 | if (ipv6_addr_equal(&psf->sf_addr, psfsrc)) | |
1969 | break; | |
1970 | psf_prev = psf; | |
1971 | } | |
1972 | if (!psf) { | |
0c600eda | 1973 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
1da177e4 LT |
1974 | if (!psf) |
1975 | return -ENOBUFS; | |
0c600eda | 1976 | |
1da177e4 LT |
1977 | psf->sf_addr = *psfsrc; |
1978 | if (psf_prev) { | |
1979 | psf_prev->sf_next = psf; | |
1980 | } else | |
1981 | pmc->mca_sources = psf; | |
1982 | } | |
1983 | psf->sf_count[sfmode]++; | |
1984 | return 0; | |
1985 | } | |
1986 | ||
1987 | static void sf_markstate(struct ifmcaddr6 *pmc) | |
1988 | { | |
1989 | struct ip6_sf_list *psf; | |
1990 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; | |
1991 | ||
1992 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) | |
1993 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
1994 | psf->sf_oldin = mca_xcount == | |
1995 | psf->sf_count[MCAST_EXCLUDE] && | |
1996 | !psf->sf_count[MCAST_INCLUDE]; | |
1997 | } else | |
1998 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; | |
1999 | } | |
2000 | ||
2001 | static int sf_setstate(struct ifmcaddr6 *pmc) | |
2002 | { | |
7add2a43 | 2003 | struct ip6_sf_list *psf, *dpsf; |
1da177e4 LT |
2004 | int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE]; |
2005 | int qrv = pmc->idev->mc_qrv; | |
2006 | int new_in, rv; | |
2007 | ||
2008 | rv = 0; | |
2009 | for (psf=pmc->mca_sources; psf; psf=psf->sf_next) { | |
2010 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) { | |
2011 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && | |
2012 | !psf->sf_count[MCAST_INCLUDE]; | |
2013 | } else | |
2014 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; | |
7add2a43 DS |
2015 | if (new_in) { |
2016 | if (!psf->sf_oldin) { | |
e80e28b6 | 2017 | struct ip6_sf_list *prev = NULL; |
7add2a43 DS |
2018 | |
2019 | for (dpsf=pmc->mca_tomb; dpsf; | |
2020 | dpsf=dpsf->sf_next) { | |
2021 | if (ipv6_addr_equal(&dpsf->sf_addr, | |
2022 | &psf->sf_addr)) | |
2023 | break; | |
2024 | prev = dpsf; | |
2025 | } | |
2026 | if (dpsf) { | |
2027 | if (prev) | |
2028 | prev->sf_next = dpsf->sf_next; | |
2029 | else | |
2030 | pmc->mca_tomb = dpsf->sf_next; | |
2031 | kfree(dpsf); | |
2032 | } | |
2033 | psf->sf_crcount = qrv; | |
2034 | rv++; | |
2035 | } | |
2036 | } else if (psf->sf_oldin) { | |
2037 | psf->sf_crcount = 0; | |
2038 | /* | |
2039 | * add or update "delete" records if an active filter | |
2040 | * is now inactive | |
2041 | */ | |
2042 | for (dpsf=pmc->mca_tomb; dpsf; dpsf=dpsf->sf_next) | |
2043 | if (ipv6_addr_equal(&dpsf->sf_addr, | |
2044 | &psf->sf_addr)) | |
2045 | break; | |
2046 | if (!dpsf) { | |
2047 | dpsf = (struct ip6_sf_list *) | |
2048 | kmalloc(sizeof(*dpsf), GFP_ATOMIC); | |
2049 | if (!dpsf) | |
2050 | continue; | |
2051 | *dpsf = *psf; | |
2052 | /* pmc->mca_lock held by callers */ | |
2053 | dpsf->sf_next = pmc->mca_tomb; | |
2054 | pmc->mca_tomb = dpsf; | |
2055 | } | |
2056 | dpsf->sf_crcount = qrv; | |
1da177e4 LT |
2057 | rv++; |
2058 | } | |
2059 | } | |
2060 | return rv; | |
2061 | } | |
2062 | ||
2063 | /* | |
2064 | * Add multicast source filter list to the interface list | |
2065 | */ | |
2066 | static int ip6_mc_add_src(struct inet6_dev *idev, struct in6_addr *pmca, | |
2067 | int sfmode, int sfcount, struct in6_addr *psfsrc, | |
2068 | int delta) | |
2069 | { | |
2070 | struct ifmcaddr6 *pmc; | |
2071 | int isexclude; | |
2072 | int i, err; | |
2073 | ||
2074 | if (!idev) | |
2075 | return -ENODEV; | |
2076 | read_lock_bh(&idev->lock); | |
2077 | for (pmc=idev->mc_list; pmc; pmc=pmc->next) { | |
2078 | if (ipv6_addr_equal(pmca, &pmc->mca_addr)) | |
2079 | break; | |
2080 | } | |
2081 | if (!pmc) { | |
2082 | /* MCA not found?? bug */ | |
2083 | read_unlock_bh(&idev->lock); | |
2084 | return -ESRCH; | |
2085 | } | |
2086 | spin_lock_bh(&pmc->mca_lock); | |
2087 | ||
2088 | sf_markstate(pmc); | |
2089 | isexclude = pmc->mca_sfmode == MCAST_EXCLUDE; | |
2090 | if (!delta) | |
2091 | pmc->mca_sfcount[sfmode]++; | |
2092 | err = 0; | |
2093 | for (i=0; i<sfcount; i++) { | |
2094 | err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i], delta); | |
2095 | if (err) | |
2096 | break; | |
2097 | } | |
2098 | if (err) { | |
2099 | int j; | |
2100 | ||
2101 | if (!delta) | |
2102 | pmc->mca_sfcount[sfmode]--; | |
2103 | for (j=0; j<i; j++) | |
2104 | (void) ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]); | |
2105 | } else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) { | |
2106 | struct inet6_dev *idev = pmc->idev; | |
2107 | struct ip6_sf_list *psf; | |
2108 | ||
2109 | /* filter mode change */ | |
2110 | if (pmc->mca_sfcount[MCAST_EXCLUDE]) | |
2111 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
2112 | else if (pmc->mca_sfcount[MCAST_INCLUDE]) | |
2113 | pmc->mca_sfmode = MCAST_INCLUDE; | |
2114 | /* else no filters; keep old mode for reports */ | |
2115 | ||
2116 | pmc->mca_crcount = idev->mc_qrv; | |
2117 | idev->mc_ifc_count = pmc->mca_crcount; | |
2118 | for (psf=pmc->mca_sources; psf; psf = psf->sf_next) | |
2119 | psf->sf_crcount = 0; | |
2120 | mld_ifc_event(idev); | |
2121 | } else if (sf_setstate(pmc)) | |
2122 | mld_ifc_event(idev); | |
2123 | spin_unlock_bh(&pmc->mca_lock); | |
2124 | read_unlock_bh(&idev->lock); | |
2125 | return err; | |
2126 | } | |
2127 | ||
2128 | static void ip6_mc_clear_src(struct ifmcaddr6 *pmc) | |
2129 | { | |
2130 | struct ip6_sf_list *psf, *nextpsf; | |
2131 | ||
2132 | for (psf=pmc->mca_tomb; psf; psf=nextpsf) { | |
2133 | nextpsf = psf->sf_next; | |
2134 | kfree(psf); | |
2135 | } | |
2136 | pmc->mca_tomb = NULL; | |
2137 | for (psf=pmc->mca_sources; psf; psf=nextpsf) { | |
2138 | nextpsf = psf->sf_next; | |
2139 | kfree(psf); | |
2140 | } | |
2141 | pmc->mca_sources = NULL; | |
2142 | pmc->mca_sfmode = MCAST_EXCLUDE; | |
de9daad9 | 2143 | pmc->mca_sfcount[MCAST_INCLUDE] = 0; |
1da177e4 LT |
2144 | pmc->mca_sfcount[MCAST_EXCLUDE] = 1; |
2145 | } | |
2146 | ||
2147 | ||
2148 | static void igmp6_join_group(struct ifmcaddr6 *ma) | |
2149 | { | |
2150 | unsigned long delay; | |
2151 | ||
2152 | if (ma->mca_flags & MAF_NOREPORT) | |
2153 | return; | |
2154 | ||
2155 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2156 | ||
2157 | delay = net_random() % IGMP6_UNSOLICITED_IVAL; | |
2158 | ||
2159 | spin_lock_bh(&ma->mca_lock); | |
2160 | if (del_timer(&ma->mca_timer)) { | |
2161 | atomic_dec(&ma->mca_refcnt); | |
2162 | delay = ma->mca_timer.expires - jiffies; | |
2163 | } | |
2164 | ||
2165 | if (!mod_timer(&ma->mca_timer, jiffies + delay)) | |
2166 | atomic_inc(&ma->mca_refcnt); | |
2167 | ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER; | |
2168 | spin_unlock_bh(&ma->mca_lock); | |
2169 | } | |
2170 | ||
2171 | static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml, | |
2172 | struct inet6_dev *idev) | |
2173 | { | |
2174 | int err; | |
2175 | ||
5ab4a6c8 DS |
2176 | /* callers have the socket lock and a write lock on ipv6_sk_mc_lock, |
2177 | * so no other readers or writers of iml or its sflist | |
2178 | */ | |
cfcabdcc | 2179 | if (!iml->sflist) { |
1da177e4 LT |
2180 | /* any-source empty exclude case */ |
2181 | return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0); | |
2182 | } | |
2183 | err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, | |
2184 | iml->sflist->sl_count, iml->sflist->sl_addr, 0); | |
2185 | sock_kfree_s(sk, iml->sflist, IP6_SFLSIZE(iml->sflist->sl_max)); | |
2186 | iml->sflist = NULL; | |
2187 | return err; | |
2188 | } | |
2189 | ||
2190 | static void igmp6_leave_group(struct ifmcaddr6 *ma) | |
2191 | { | |
2192 | if (MLD_V1_SEEN(ma->idev)) { | |
2193 | if (ma->mca_flags & MAF_LAST_REPORTER) | |
2194 | igmp6_send(&ma->mca_addr, ma->idev->dev, | |
2195 | ICMPV6_MGM_REDUCTION); | |
2196 | } else { | |
2197 | mld_add_delrec(ma->idev, ma); | |
2198 | mld_ifc_event(ma->idev); | |
2199 | } | |
2200 | } | |
2201 | ||
2202 | static void mld_gq_timer_expire(unsigned long data) | |
2203 | { | |
2204 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2205 | ||
2206 | idev->mc_gq_running = 0; | |
2207 | mld_send_report(idev, NULL); | |
2208 | __in6_dev_put(idev); | |
2209 | } | |
2210 | ||
2211 | static void mld_ifc_timer_expire(unsigned long data) | |
2212 | { | |
2213 | struct inet6_dev *idev = (struct inet6_dev *)data; | |
2214 | ||
2215 | mld_send_cr(idev); | |
2216 | if (idev->mc_ifc_count) { | |
2217 | idev->mc_ifc_count--; | |
2218 | if (idev->mc_ifc_count) | |
2219 | mld_ifc_start_timer(idev, idev->mc_maxdelay); | |
2220 | } | |
2221 | __in6_dev_put(idev); | |
2222 | } | |
2223 | ||
2224 | static void mld_ifc_event(struct inet6_dev *idev) | |
2225 | { | |
2226 | if (MLD_V1_SEEN(idev)) | |
2227 | return; | |
2228 | idev->mc_ifc_count = idev->mc_qrv; | |
2229 | mld_ifc_start_timer(idev, 1); | |
2230 | } | |
2231 | ||
2232 | ||
2233 | static void igmp6_timer_handler(unsigned long data) | |
2234 | { | |
2235 | struct ifmcaddr6 *ma = (struct ifmcaddr6 *) data; | |
2236 | ||
2237 | if (MLD_V1_SEEN(ma->idev)) | |
2238 | igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT); | |
2239 | else | |
2240 | mld_send_report(ma->idev, ma); | |
2241 | ||
2242 | spin_lock(&ma->mca_lock); | |
2243 | ma->mca_flags |= MAF_LAST_REPORTER; | |
2244 | ma->mca_flags &= ~MAF_TIMER_RUNNING; | |
2245 | spin_unlock(&ma->mca_lock); | |
2246 | ma_put(ma); | |
2247 | } | |
2248 | ||
2249 | /* Device going down */ | |
2250 | ||
2251 | void ipv6_mc_down(struct inet6_dev *idev) | |
2252 | { | |
2253 | struct ifmcaddr6 *i; | |
2254 | ||
2255 | /* Withdraw multicast list */ | |
2256 | ||
2257 | read_lock_bh(&idev->lock); | |
2258 | idev->mc_ifc_count = 0; | |
2259 | if (del_timer(&idev->mc_ifc_timer)) | |
2260 | __in6_dev_put(idev); | |
2261 | idev->mc_gq_running = 0; | |
2262 | if (del_timer(&idev->mc_gq_timer)) | |
2263 | __in6_dev_put(idev); | |
2264 | ||
2265 | for (i = idev->mc_list; i; i=i->next) | |
2266 | igmp6_group_dropped(i); | |
2267 | read_unlock_bh(&idev->lock); | |
2268 | ||
2269 | mld_clear_delrec(idev); | |
2270 | } | |
2271 | ||
2272 | ||
2273 | /* Device going up */ | |
2274 | ||
2275 | void ipv6_mc_up(struct inet6_dev *idev) | |
2276 | { | |
2277 | struct ifmcaddr6 *i; | |
2278 | ||
2279 | /* Install multicast list, except for all-nodes (already installed) */ | |
2280 | ||
2281 | read_lock_bh(&idev->lock); | |
2282 | for (i = idev->mc_list; i; i=i->next) | |
2283 | igmp6_group_added(i); | |
2284 | read_unlock_bh(&idev->lock); | |
2285 | } | |
2286 | ||
2287 | /* IPv6 device initialization. */ | |
2288 | ||
2289 | void ipv6_mc_init_dev(struct inet6_dev *idev) | |
2290 | { | |
1da177e4 LT |
2291 | write_lock_bh(&idev->lock); |
2292 | rwlock_init(&idev->mc_lock); | |
2293 | idev->mc_gq_running = 0; | |
b24b8a24 PE |
2294 | setup_timer(&idev->mc_gq_timer, mld_gq_timer_expire, |
2295 | (unsigned long)idev); | |
1da177e4 LT |
2296 | idev->mc_tomb = NULL; |
2297 | idev->mc_ifc_count = 0; | |
b24b8a24 PE |
2298 | setup_timer(&idev->mc_ifc_timer, mld_ifc_timer_expire, |
2299 | (unsigned long)idev); | |
1da177e4 LT |
2300 | idev->mc_qrv = MLD_QRV_DEFAULT; |
2301 | idev->mc_maxdelay = IGMP6_UNSOLICITED_IVAL; | |
2302 | idev->mc_v1_seen = 0; | |
2303 | write_unlock_bh(&idev->lock); | |
1da177e4 LT |
2304 | } |
2305 | ||
2306 | /* | |
2307 | * Device is about to be destroyed: clean up. | |
2308 | */ | |
2309 | ||
2310 | void ipv6_mc_destroy_dev(struct inet6_dev *idev) | |
2311 | { | |
2312 | struct ifmcaddr6 *i; | |
2313 | struct in6_addr maddr; | |
2314 | ||
2315 | /* Deactivate timers */ | |
2316 | ipv6_mc_down(idev); | |
2317 | ||
2318 | /* Delete all-nodes address. */ | |
2319 | ipv6_addr_all_nodes(&maddr); | |
2320 | ||
2321 | /* We cannot call ipv6_dev_mc_dec() directly, our caller in | |
2322 | * addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will | |
2323 | * fail. | |
2324 | */ | |
2325 | __ipv6_dev_mc_dec(idev, &maddr); | |
2326 | ||
2327 | if (idev->cnf.forwarding) { | |
2328 | ipv6_addr_all_routers(&maddr); | |
2329 | __ipv6_dev_mc_dec(idev, &maddr); | |
2330 | } | |
2331 | ||
2332 | write_lock_bh(&idev->lock); | |
2333 | while ((i = idev->mc_list) != NULL) { | |
2334 | idev->mc_list = i->next; | |
2335 | write_unlock_bh(&idev->lock); | |
2336 | ||
2337 | igmp6_group_dropped(i); | |
2338 | ma_put(i); | |
2339 | ||
2340 | write_lock_bh(&idev->lock); | |
2341 | } | |
2342 | write_unlock_bh(&idev->lock); | |
2343 | } | |
2344 | ||
2345 | #ifdef CONFIG_PROC_FS | |
2346 | struct igmp6_mc_iter_state { | |
b8ad0cbc | 2347 | struct seq_net_private p; |
1da177e4 LT |
2348 | struct net_device *dev; |
2349 | struct inet6_dev *idev; | |
2350 | }; | |
2351 | ||
2352 | #define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private) | |
2353 | ||
2354 | static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq) | |
2355 | { | |
2356 | struct ifmcaddr6 *im = NULL; | |
2357 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
b8ad0cbc | 2358 | struct net *net = state->p.net; |
1da177e4 | 2359 | |
7562f876 | 2360 | state->idev = NULL; |
b8ad0cbc | 2361 | for_each_netdev(net, state->dev) { |
1da177e4 LT |
2362 | struct inet6_dev *idev; |
2363 | idev = in6_dev_get(state->dev); | |
2364 | if (!idev) | |
2365 | continue; | |
2366 | read_lock_bh(&idev->lock); | |
2367 | im = idev->mc_list; | |
2368 | if (im) { | |
2369 | state->idev = idev; | |
2370 | break; | |
2371 | } | |
2372 | read_unlock_bh(&idev->lock); | |
2373 | in6_dev_put(idev); | |
2374 | } | |
2375 | return im; | |
2376 | } | |
2377 | ||
2378 | static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im) | |
2379 | { | |
2380 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2381 | ||
2382 | im = im->next; | |
2383 | while (!im) { | |
2384 | if (likely(state->idev != NULL)) { | |
2385 | read_unlock_bh(&state->idev->lock); | |
2386 | in6_dev_put(state->idev); | |
2387 | } | |
7562f876 | 2388 | state->dev = next_net_device(state->dev); |
1da177e4 LT |
2389 | if (!state->dev) { |
2390 | state->idev = NULL; | |
2391 | break; | |
2392 | } | |
2393 | state->idev = in6_dev_get(state->dev); | |
2394 | if (!state->idev) | |
2395 | continue; | |
2396 | read_lock_bh(&state->idev->lock); | |
2397 | im = state->idev->mc_list; | |
2398 | } | |
2399 | return im; | |
2400 | } | |
2401 | ||
2402 | static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos) | |
2403 | { | |
2404 | struct ifmcaddr6 *im = igmp6_mc_get_first(seq); | |
2405 | if (im) | |
2406 | while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL) | |
2407 | --pos; | |
2408 | return pos ? NULL : im; | |
2409 | } | |
2410 | ||
2411 | static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos) | |
9a429c49 | 2412 | __acquires(dev_base_lock) |
1da177e4 LT |
2413 | { |
2414 | read_lock(&dev_base_lock); | |
2415 | return igmp6_mc_get_idx(seq, *pos); | |
2416 | } | |
2417 | ||
2418 | static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2419 | { | |
2420 | struct ifmcaddr6 *im; | |
2421 | im = igmp6_mc_get_next(seq, v); | |
2422 | ++*pos; | |
2423 | return im; | |
2424 | } | |
2425 | ||
2426 | static void igmp6_mc_seq_stop(struct seq_file *seq, void *v) | |
9a429c49 | 2427 | __releases(dev_base_lock) |
1da177e4 LT |
2428 | { |
2429 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2430 | if (likely(state->idev != NULL)) { | |
2431 | read_unlock_bh(&state->idev->lock); | |
2432 | in6_dev_put(state->idev); | |
2433 | state->idev = NULL; | |
2434 | } | |
2435 | state->dev = NULL; | |
2436 | read_unlock(&dev_base_lock); | |
2437 | } | |
2438 | ||
2439 | static int igmp6_mc_seq_show(struct seq_file *seq, void *v) | |
2440 | { | |
2441 | struct ifmcaddr6 *im = (struct ifmcaddr6 *)v; | |
2442 | struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq); | |
2443 | ||
2444 | seq_printf(seq, | |
1ab1457c | 2445 | "%-4d %-15s " NIP6_SEQFMT " %5d %08X %ld\n", |
1da177e4 LT |
2446 | state->dev->ifindex, state->dev->name, |
2447 | NIP6(im->mca_addr), | |
2448 | im->mca_users, im->mca_flags, | |
2449 | (im->mca_flags&MAF_TIMER_RUNNING) ? | |
2450 | jiffies_to_clock_t(im->mca_timer.expires-jiffies) : 0); | |
2451 | return 0; | |
2452 | } | |
2453 | ||
56b3d975 | 2454 | static const struct seq_operations igmp6_mc_seq_ops = { |
1da177e4 LT |
2455 | .start = igmp6_mc_seq_start, |
2456 | .next = igmp6_mc_seq_next, | |
2457 | .stop = igmp6_mc_seq_stop, | |
2458 | .show = igmp6_mc_seq_show, | |
2459 | }; | |
2460 | ||
2461 | static int igmp6_mc_seq_open(struct inode *inode, struct file *file) | |
2462 | { | |
b8ad0cbc DL |
2463 | return seq_open_net(inode, file, &igmp6_mc_seq_ops, |
2464 | sizeof(struct igmp6_mc_iter_state)); | |
1da177e4 LT |
2465 | } |
2466 | ||
9a32144e | 2467 | static const struct file_operations igmp6_mc_seq_fops = { |
1da177e4 LT |
2468 | .owner = THIS_MODULE, |
2469 | .open = igmp6_mc_seq_open, | |
2470 | .read = seq_read, | |
2471 | .llseek = seq_lseek, | |
b8ad0cbc | 2472 | .release = seq_release_net, |
1da177e4 LT |
2473 | }; |
2474 | ||
2475 | struct igmp6_mcf_iter_state { | |
b8ad0cbc | 2476 | struct seq_net_private p; |
1da177e4 LT |
2477 | struct net_device *dev; |
2478 | struct inet6_dev *idev; | |
2479 | struct ifmcaddr6 *im; | |
2480 | }; | |
2481 | ||
2482 | #define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private) | |
2483 | ||
2484 | static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq) | |
2485 | { | |
2486 | struct ip6_sf_list *psf = NULL; | |
2487 | struct ifmcaddr6 *im = NULL; | |
2488 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
b8ad0cbc | 2489 | struct net *net = state->p.net; |
1da177e4 | 2490 | |
7562f876 PE |
2491 | state->idev = NULL; |
2492 | state->im = NULL; | |
b8ad0cbc | 2493 | for_each_netdev(net, state->dev) { |
1da177e4 LT |
2494 | struct inet6_dev *idev; |
2495 | idev = in6_dev_get(state->dev); | |
2496 | if (unlikely(idev == NULL)) | |
2497 | continue; | |
2498 | read_lock_bh(&idev->lock); | |
2499 | im = idev->mc_list; | |
2500 | if (likely(im != NULL)) { | |
2501 | spin_lock_bh(&im->mca_lock); | |
2502 | psf = im->mca_sources; | |
2503 | if (likely(psf != NULL)) { | |
2504 | state->im = im; | |
2505 | state->idev = idev; | |
2506 | break; | |
2507 | } | |
2508 | spin_unlock_bh(&im->mca_lock); | |
2509 | } | |
2510 | read_unlock_bh(&idev->lock); | |
2511 | in6_dev_put(idev); | |
2512 | } | |
2513 | return psf; | |
2514 | } | |
2515 | ||
2516 | static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf) | |
2517 | { | |
2518 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2519 | ||
2520 | psf = psf->sf_next; | |
2521 | while (!psf) { | |
2522 | spin_unlock_bh(&state->im->mca_lock); | |
2523 | state->im = state->im->next; | |
2524 | while (!state->im) { | |
2525 | if (likely(state->idev != NULL)) { | |
2526 | read_unlock_bh(&state->idev->lock); | |
2527 | in6_dev_put(state->idev); | |
2528 | } | |
7562f876 | 2529 | state->dev = next_net_device(state->dev); |
1da177e4 LT |
2530 | if (!state->dev) { |
2531 | state->idev = NULL; | |
2532 | goto out; | |
2533 | } | |
2534 | state->idev = in6_dev_get(state->dev); | |
2535 | if (!state->idev) | |
2536 | continue; | |
2537 | read_lock_bh(&state->idev->lock); | |
2538 | state->im = state->idev->mc_list; | |
2539 | } | |
2540 | if (!state->im) | |
2541 | break; | |
2542 | spin_lock_bh(&state->im->mca_lock); | |
2543 | psf = state->im->mca_sources; | |
2544 | } | |
2545 | out: | |
2546 | return psf; | |
2547 | } | |
2548 | ||
2549 | static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos) | |
2550 | { | |
2551 | struct ip6_sf_list *psf = igmp6_mcf_get_first(seq); | |
2552 | if (psf) | |
2553 | while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL) | |
2554 | --pos; | |
2555 | return pos ? NULL : psf; | |
2556 | } | |
2557 | ||
2558 | static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos) | |
9a429c49 | 2559 | __acquires(dev_base_lock) |
1da177e4 LT |
2560 | { |
2561 | read_lock(&dev_base_lock); | |
2562 | return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
2563 | } | |
2564 | ||
2565 | static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2566 | { | |
2567 | struct ip6_sf_list *psf; | |
2568 | if (v == SEQ_START_TOKEN) | |
2569 | psf = igmp6_mcf_get_first(seq); | |
2570 | else | |
2571 | psf = igmp6_mcf_get_next(seq, v); | |
2572 | ++*pos; | |
2573 | return psf; | |
2574 | } | |
2575 | ||
2576 | static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v) | |
9a429c49 | 2577 | __releases(dev_base_lock) |
1da177e4 LT |
2578 | { |
2579 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2580 | if (likely(state->im != NULL)) { | |
2581 | spin_unlock_bh(&state->im->mca_lock); | |
2582 | state->im = NULL; | |
2583 | } | |
2584 | if (likely(state->idev != NULL)) { | |
2585 | read_unlock_bh(&state->idev->lock); | |
2586 | in6_dev_put(state->idev); | |
2587 | state->idev = NULL; | |
2588 | } | |
2589 | state->dev = NULL; | |
2590 | read_unlock(&dev_base_lock); | |
2591 | } | |
2592 | ||
2593 | static int igmp6_mcf_seq_show(struct seq_file *seq, void *v) | |
2594 | { | |
2595 | struct ip6_sf_list *psf = (struct ip6_sf_list *)v; | |
2596 | struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq); | |
2597 | ||
2598 | if (v == SEQ_START_TOKEN) { | |
1ab1457c | 2599 | seq_printf(seq, |
1da177e4 | 2600 | "%3s %6s " |
9343e79a | 2601 | "%32s %32s %6s %6s\n", "Idx", |
1da177e4 LT |
2602 | "Device", "Multicast Address", |
2603 | "Source Address", "INC", "EXC"); | |
2604 | } else { | |
2605 | seq_printf(seq, | |
9343e79a | 2606 | "%3d %6.6s " NIP6_SEQFMT " " NIP6_SEQFMT " %6lu %6lu\n", |
1da177e4 LT |
2607 | state->dev->ifindex, state->dev->name, |
2608 | NIP6(state->im->mca_addr), | |
2609 | NIP6(psf->sf_addr), | |
2610 | psf->sf_count[MCAST_INCLUDE], | |
2611 | psf->sf_count[MCAST_EXCLUDE]); | |
2612 | } | |
2613 | return 0; | |
2614 | } | |
2615 | ||
56b3d975 | 2616 | static const struct seq_operations igmp6_mcf_seq_ops = { |
1da177e4 LT |
2617 | .start = igmp6_mcf_seq_start, |
2618 | .next = igmp6_mcf_seq_next, | |
2619 | .stop = igmp6_mcf_seq_stop, | |
2620 | .show = igmp6_mcf_seq_show, | |
2621 | }; | |
2622 | ||
2623 | static int igmp6_mcf_seq_open(struct inode *inode, struct file *file) | |
2624 | { | |
b8ad0cbc DL |
2625 | return seq_open_net(inode, file, &igmp6_mcf_seq_ops, |
2626 | sizeof(struct igmp6_mcf_iter_state)); | |
1da177e4 LT |
2627 | } |
2628 | ||
9a32144e | 2629 | static const struct file_operations igmp6_mcf_seq_fops = { |
1da177e4 LT |
2630 | .owner = THIS_MODULE, |
2631 | .open = igmp6_mcf_seq_open, | |
2632 | .read = seq_read, | |
2633 | .llseek = seq_lseek, | |
b8ad0cbc | 2634 | .release = seq_release_net, |
1da177e4 LT |
2635 | }; |
2636 | #endif | |
2637 | ||
b8ad0cbc | 2638 | static int igmp6_net_init(struct net *net) |
1da177e4 LT |
2639 | { |
2640 | struct ipv6_pinfo *np; | |
b8ad0cbc | 2641 | struct socket *sock; |
1da177e4 LT |
2642 | struct sock *sk; |
2643 | int err; | |
2644 | ||
b8ad0cbc | 2645 | err = sock_create_kern(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6, &sock); |
1da177e4 LT |
2646 | if (err < 0) { |
2647 | printk(KERN_ERR | |
2648 | "Failed to initialize the IGMP6 control socket (err %d).\n", | |
2649 | err); | |
b8ad0cbc | 2650 | goto out; |
1da177e4 LT |
2651 | } |
2652 | ||
b8ad0cbc DL |
2653 | net->ipv6.igmp_sk = sk = sock->sk; |
2654 | sk_change_net(sk, net); | |
1da177e4 LT |
2655 | sk->sk_allocation = GFP_ATOMIC; |
2656 | sk->sk_prot->unhash(sk); | |
2657 | ||
2658 | np = inet6_sk(sk); | |
2659 | np->hop_limit = 1; | |
2660 | ||
2661 | #ifdef CONFIG_PROC_FS | |
b8ad0cbc DL |
2662 | err = -ENOMEM; |
2663 | if (!proc_net_fops_create(net, "igmp6", S_IRUGO, &igmp6_mc_seq_fops)) | |
2664 | goto out_sock_create; | |
2665 | if (!proc_net_fops_create(net, "mcfilter6", S_IRUGO, | |
2666 | &igmp6_mcf_seq_fops)) { | |
2667 | proc_net_remove(net, "igmp6"); | |
2668 | goto out_sock_create; | |
2669 | } | |
1da177e4 LT |
2670 | #endif |
2671 | ||
b8ad0cbc DL |
2672 | err = 0; |
2673 | out: | |
2674 | return err; | |
2675 | ||
2676 | out_sock_create: | |
2677 | sk_release_kernel(net->ipv6.igmp_sk); | |
2678 | goto out; | |
1da177e4 LT |
2679 | } |
2680 | ||
b8ad0cbc | 2681 | static void igmp6_net_exit(struct net *net) |
1da177e4 | 2682 | { |
b8ad0cbc | 2683 | sk_release_kernel(net->ipv6.igmp_sk); |
1da177e4 | 2684 | #ifdef CONFIG_PROC_FS |
b8ad0cbc DL |
2685 | proc_net_remove(net, "mcfilter6"); |
2686 | proc_net_remove(net, "igmp6"); | |
1da177e4 LT |
2687 | #endif |
2688 | } | |
b8ad0cbc DL |
2689 | |
2690 | static struct pernet_operations igmp6_net_ops = { | |
2691 | .init = igmp6_net_init, | |
2692 | .exit = igmp6_net_exit, | |
2693 | }; | |
2694 | ||
2695 | int __init igmp6_init(void) | |
2696 | { | |
2697 | return register_pernet_subsys(&igmp6_net_ops); | |
2698 | } | |
2699 | ||
2700 | void igmp6_cleanup(void) | |
2701 | { | |
2702 | unregister_pernet_subsys(&igmp6_net_ops); | |
2703 | } |