Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Linux NET3: Internet Group Management Protocol [IGMP] | |
3 | * | |
4 | * This code implements the IGMP protocol as defined in RFC1112. There has | |
5 | * been a further revision of this protocol since which is now supported. | |
6 | * | |
7 | * If you have trouble with this module be careful what gcc you have used, | |
8 | * the older version didn't come out right using gcc 2.5.8, the newer one | |
9 | * seems to fall out with gcc 2.6.2. | |
10 | * | |
11 | * Version: $Id: igmp.c,v 1.47 2002/02/01 22:01:03 davem Exp $ | |
12 | * | |
13 | * Authors: | |
14 | * Alan Cox <Alan.Cox@linux.org> | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or | |
17 | * modify it under the terms of the GNU General Public License | |
18 | * as published by the Free Software Foundation; either version | |
19 | * 2 of the License, or (at your option) any later version. | |
20 | * | |
21 | * Fixes: | |
22 | * | |
23 | * Alan Cox : Added lots of __inline__ to optimise | |
24 | * the memory usage of all the tiny little | |
25 | * functions. | |
26 | * Alan Cox : Dumped the header building experiment. | |
27 | * Alan Cox : Minor tweaks ready for multicast routing | |
28 | * and extended IGMP protocol. | |
29 | * Alan Cox : Removed a load of inline directives. Gcc 2.5.8 | |
30 | * writes utterly bogus code otherwise (sigh) | |
31 | * fixed IGMP loopback to behave in the manner | |
32 | * desired by mrouted, fixed the fact it has been | |
33 | * broken since 1.3.6 and cleaned up a few minor | |
34 | * points. | |
35 | * | |
36 | * Chih-Jen Chang : Tried to revise IGMP to Version 2 | |
37 | * Tsu-Sheng Tsao E-mail: chihjenc@scf.usc.edu and tsusheng@scf.usc.edu | |
e905a9ed | 38 | * The enhancements are mainly based on Steve Deering's |
1da177e4 LT |
39 | * ipmulti-3.5 source code. |
40 | * Chih-Jen Chang : Added the igmp_get_mrouter_info and | |
41 | * Tsu-Sheng Tsao igmp_set_mrouter_info to keep track of | |
42 | * the mrouted version on that device. | |
43 | * Chih-Jen Chang : Added the max_resp_time parameter to | |
44 | * Tsu-Sheng Tsao igmp_heard_query(). Using this parameter | |
45 | * to identify the multicast router version | |
46 | * and do what the IGMP version 2 specified. | |
47 | * Chih-Jen Chang : Added a timer to revert to IGMP V2 router | |
48 | * Tsu-Sheng Tsao if the specified time expired. | |
49 | * Alan Cox : Stop IGMP from 0.0.0.0 being accepted. | |
50 | * Alan Cox : Use GFP_ATOMIC in the right places. | |
51 | * Christian Daudt : igmp timer wasn't set for local group | |
e905a9ed YH |
52 | * memberships but was being deleted, |
53 | * which caused a "del_timer() called | |
1da177e4 LT |
54 | * from %p with timer not initialized\n" |
55 | * message (960131). | |
e905a9ed | 56 | * Christian Daudt : removed del_timer from |
1da177e4 LT |
57 | * igmp_timer_expire function (960205). |
58 | * Christian Daudt : igmp_heard_report now only calls | |
59 | * igmp_timer_expire if tm->running is | |
60 | * true (960216). | |
61 | * Malcolm Beattie : ttl comparison wrong in igmp_rcv made | |
62 | * igmp_heard_query never trigger. Expiry | |
63 | * miscalculation fixed in igmp_heard_query | |
64 | * and random() made to return unsigned to | |
65 | * prevent negative expiry times. | |
66 | * Alexey Kuznetsov: Wrong group leaving behaviour, backport | |
67 | * fix from pending 2.1.x patches. | |
68 | * Alan Cox: Forget to enable FDDI support earlier. | |
69 | * Alexey Kuznetsov: Fixed leaving groups on device down. | |
70 | * Alexey Kuznetsov: Accordance to igmp-v2-06 draft. | |
71 | * David L Stevens: IGMPv3 support, with help from | |
72 | * Vinay Kulkarni | |
73 | */ | |
74 | ||
1da177e4 LT |
75 | #include <linux/module.h> |
76 | #include <asm/uaccess.h> | |
77 | #include <asm/system.h> | |
78 | #include <linux/types.h> | |
79 | #include <linux/kernel.h> | |
80 | #include <linux/jiffies.h> | |
81 | #include <linux/string.h> | |
82 | #include <linux/socket.h> | |
83 | #include <linux/sockios.h> | |
84 | #include <linux/in.h> | |
85 | #include <linux/inet.h> | |
86 | #include <linux/netdevice.h> | |
87 | #include <linux/skbuff.h> | |
88 | #include <linux/inetdevice.h> | |
89 | #include <linux/igmp.h> | |
90 | #include <linux/if_arp.h> | |
91 | #include <linux/rtnetlink.h> | |
92 | #include <linux/times.h> | |
14c85021 | 93 | |
457c4cbc | 94 | #include <net/net_namespace.h> |
14c85021 | 95 | #include <net/arp.h> |
1da177e4 LT |
96 | #include <net/ip.h> |
97 | #include <net/protocol.h> | |
98 | #include <net/route.h> | |
99 | #include <net/sock.h> | |
100 | #include <net/checksum.h> | |
101 | #include <linux/netfilter_ipv4.h> | |
102 | #ifdef CONFIG_IP_MROUTE | |
103 | #include <linux/mroute.h> | |
104 | #endif | |
105 | #ifdef CONFIG_PROC_FS | |
106 | #include <linux/proc_fs.h> | |
107 | #include <linux/seq_file.h> | |
108 | #endif | |
109 | ||
110 | #define IP_MAX_MEMBERSHIPS 20 | |
111 | #define IP_MAX_MSF 10 | |
112 | ||
113 | #ifdef CONFIG_IP_MULTICAST | |
114 | /* Parameter names and values are taken from igmp-v2-06 draft */ | |
115 | ||
116 | #define IGMP_V1_Router_Present_Timeout (400*HZ) | |
117 | #define IGMP_V2_Router_Present_Timeout (400*HZ) | |
118 | #define IGMP_Unsolicited_Report_Interval (10*HZ) | |
119 | #define IGMP_Query_Response_Interval (10*HZ) | |
120 | #define IGMP_Unsolicited_Report_Count 2 | |
121 | ||
122 | ||
123 | #define IGMP_Initial_Report_Delay (1) | |
124 | ||
125 | /* IGMP_Initial_Report_Delay is not from IGMP specs! | |
126 | * IGMP specs require to report membership immediately after | |
127 | * joining a group, but we delay the first report by a | |
128 | * small interval. It seems more natural and still does not | |
129 | * contradict to specs provided this delay is small enough. | |
130 | */ | |
131 | ||
42f811b8 | 132 | #define IGMP_V1_SEEN(in_dev) \ |
586f1211 | 133 | (IPV4_DEVCONF_ALL(in_dev->dev->nd_net, FORCE_IGMP_VERSION) == 1 || \ |
42f811b8 HX |
134 | IN_DEV_CONF_GET((in_dev), FORCE_IGMP_VERSION) == 1 || \ |
135 | ((in_dev)->mr_v1_seen && \ | |
136 | time_before(jiffies, (in_dev)->mr_v1_seen))) | |
137 | #define IGMP_V2_SEEN(in_dev) \ | |
586f1211 | 138 | (IPV4_DEVCONF_ALL(in_dev->dev->nd_net, FORCE_IGMP_VERSION) == 2 || \ |
42f811b8 HX |
139 | IN_DEV_CONF_GET((in_dev), FORCE_IGMP_VERSION) == 2 || \ |
140 | ((in_dev)->mr_v2_seen && \ | |
141 | time_before(jiffies, (in_dev)->mr_v2_seen))) | |
1da177e4 LT |
142 | |
143 | static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im); | |
63007727 | 144 | static void igmpv3_del_delrec(struct in_device *in_dev, __be32 multiaddr); |
1da177e4 LT |
145 | static void igmpv3_clear_delrec(struct in_device *in_dev); |
146 | static int sf_setstate(struct ip_mc_list *pmc); | |
147 | static void sf_markstate(struct ip_mc_list *pmc); | |
148 | #endif | |
149 | static void ip_mc_clear_src(struct ip_mc_list *pmc); | |
8f935bbd AV |
150 | static int ip_mc_add_src(struct in_device *in_dev, __be32 *pmca, int sfmode, |
151 | int sfcount, __be32 *psfsrc, int delta); | |
1da177e4 LT |
152 | |
153 | static void ip_ma_put(struct ip_mc_list *im) | |
154 | { | |
155 | if (atomic_dec_and_test(&im->refcnt)) { | |
156 | in_dev_put(im->interface); | |
157 | kfree(im); | |
158 | } | |
159 | } | |
160 | ||
161 | #ifdef CONFIG_IP_MULTICAST | |
162 | ||
163 | /* | |
164 | * Timer management | |
165 | */ | |
166 | ||
167 | static __inline__ void igmp_stop_timer(struct ip_mc_list *im) | |
168 | { | |
169 | spin_lock_bh(&im->lock); | |
170 | if (del_timer(&im->timer)) | |
171 | atomic_dec(&im->refcnt); | |
172 | im->tm_running=0; | |
173 | im->reporter = 0; | |
174 | im->unsolicit_count = 0; | |
175 | spin_unlock_bh(&im->lock); | |
176 | } | |
177 | ||
178 | /* It must be called with locked im->lock */ | |
179 | static void igmp_start_timer(struct ip_mc_list *im, int max_delay) | |
180 | { | |
181 | int tv=net_random() % max_delay; | |
182 | ||
183 | im->tm_running=1; | |
184 | if (!mod_timer(&im->timer, jiffies+tv+2)) | |
185 | atomic_inc(&im->refcnt); | |
186 | } | |
187 | ||
188 | static void igmp_gq_start_timer(struct in_device *in_dev) | |
189 | { | |
190 | int tv = net_random() % in_dev->mr_maxdelay; | |
191 | ||
192 | in_dev->mr_gq_running = 1; | |
193 | if (!mod_timer(&in_dev->mr_gq_timer, jiffies+tv+2)) | |
194 | in_dev_hold(in_dev); | |
195 | } | |
196 | ||
197 | static void igmp_ifc_start_timer(struct in_device *in_dev, int delay) | |
198 | { | |
199 | int tv = net_random() % delay; | |
200 | ||
201 | if (!mod_timer(&in_dev->mr_ifc_timer, jiffies+tv+2)) | |
202 | in_dev_hold(in_dev); | |
203 | } | |
204 | ||
205 | static void igmp_mod_timer(struct ip_mc_list *im, int max_delay) | |
206 | { | |
207 | spin_lock_bh(&im->lock); | |
208 | im->unsolicit_count = 0; | |
209 | if (del_timer(&im->timer)) { | |
210 | if ((long)(im->timer.expires-jiffies) < max_delay) { | |
211 | add_timer(&im->timer); | |
212 | im->tm_running=1; | |
213 | spin_unlock_bh(&im->lock); | |
214 | return; | |
215 | } | |
216 | atomic_dec(&im->refcnt); | |
217 | } | |
218 | igmp_start_timer(im, max_delay); | |
219 | spin_unlock_bh(&im->lock); | |
220 | } | |
221 | ||
222 | ||
223 | /* | |
224 | * Send an IGMP report. | |
225 | */ | |
226 | ||
227 | #define IGMP_SIZE (sizeof(struct igmphdr)+sizeof(struct iphdr)+4) | |
228 | ||
229 | ||
230 | static int is_in(struct ip_mc_list *pmc, struct ip_sf_list *psf, int type, | |
231 | int gdeleted, int sdeleted) | |
232 | { | |
233 | switch (type) { | |
234 | case IGMPV3_MODE_IS_INCLUDE: | |
235 | case IGMPV3_MODE_IS_EXCLUDE: | |
236 | if (gdeleted || sdeleted) | |
237 | return 0; | |
ad12583f DS |
238 | if (!(pmc->gsquery && !psf->sf_gsresp)) { |
239 | if (pmc->sfmode == MCAST_INCLUDE) | |
240 | return 1; | |
241 | /* don't include if this source is excluded | |
242 | * in all filters | |
243 | */ | |
244 | if (psf->sf_count[MCAST_INCLUDE]) | |
245 | return type == IGMPV3_MODE_IS_INCLUDE; | |
246 | return pmc->sfcount[MCAST_EXCLUDE] == | |
247 | psf->sf_count[MCAST_EXCLUDE]; | |
248 | } | |
249 | return 0; | |
1da177e4 LT |
250 | case IGMPV3_CHANGE_TO_INCLUDE: |
251 | if (gdeleted || sdeleted) | |
252 | return 0; | |
253 | return psf->sf_count[MCAST_INCLUDE] != 0; | |
254 | case IGMPV3_CHANGE_TO_EXCLUDE: | |
255 | if (gdeleted || sdeleted) | |
256 | return 0; | |
257 | if (pmc->sfcount[MCAST_EXCLUDE] == 0 || | |
258 | psf->sf_count[MCAST_INCLUDE]) | |
259 | return 0; | |
260 | return pmc->sfcount[MCAST_EXCLUDE] == | |
261 | psf->sf_count[MCAST_EXCLUDE]; | |
262 | case IGMPV3_ALLOW_NEW_SOURCES: | |
263 | if (gdeleted || !psf->sf_crcount) | |
264 | return 0; | |
265 | return (pmc->sfmode == MCAST_INCLUDE) ^ sdeleted; | |
266 | case IGMPV3_BLOCK_OLD_SOURCES: | |
267 | if (pmc->sfmode == MCAST_INCLUDE) | |
268 | return gdeleted || (psf->sf_crcount && sdeleted); | |
269 | return psf->sf_crcount && !gdeleted && !sdeleted; | |
270 | } | |
271 | return 0; | |
272 | } | |
273 | ||
274 | static int | |
275 | igmp_scount(struct ip_mc_list *pmc, int type, int gdeleted, int sdeleted) | |
276 | { | |
277 | struct ip_sf_list *psf; | |
278 | int scount = 0; | |
279 | ||
280 | for (psf=pmc->sources; psf; psf=psf->sf_next) { | |
281 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) | |
282 | continue; | |
283 | scount++; | |
284 | } | |
285 | return scount; | |
286 | } | |
287 | ||
288 | static struct sk_buff *igmpv3_newpack(struct net_device *dev, int size) | |
289 | { | |
290 | struct sk_buff *skb; | |
291 | struct rtable *rt; | |
292 | struct iphdr *pip; | |
293 | struct igmpv3_report *pig; | |
294 | ||
295 | skb = alloc_skb(size + LL_RESERVED_SPACE(dev), GFP_ATOMIC); | |
296 | if (skb == NULL) | |
297 | return NULL; | |
298 | ||
299 | { | |
300 | struct flowi fl = { .oif = dev->ifindex, | |
301 | .nl_u = { .ip4_u = { | |
302 | .daddr = IGMPV3_ALL_MCR } }, | |
303 | .proto = IPPROTO_IGMP }; | |
f206351a | 304 | if (ip_route_output_key(&init_net, &rt, &fl)) { |
1da177e4 LT |
305 | kfree_skb(skb); |
306 | return NULL; | |
307 | } | |
308 | } | |
309 | if (rt->rt_src == 0) { | |
310 | kfree_skb(skb); | |
311 | ip_rt_put(rt); | |
312 | return NULL; | |
313 | } | |
314 | ||
315 | skb->dst = &rt->u.dst; | |
316 | skb->dev = dev; | |
317 | ||
318 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
319 | ||
7e28ecc2 | 320 | skb_reset_network_header(skb); |
eddc9ec5 | 321 | pip = ip_hdr(skb); |
7e28ecc2 | 322 | skb_put(skb, sizeof(struct iphdr) + 4); |
1da177e4 LT |
323 | |
324 | pip->version = 4; | |
325 | pip->ihl = (sizeof(struct iphdr)+4)>>2; | |
326 | pip->tos = 0xc0; | |
327 | pip->frag_off = htons(IP_DF); | |
328 | pip->ttl = 1; | |
329 | pip->daddr = rt->rt_dst; | |
330 | pip->saddr = rt->rt_src; | |
331 | pip->protocol = IPPROTO_IGMP; | |
332 | pip->tot_len = 0; /* filled in later */ | |
333 | ip_select_ident(pip, &rt->u.dst, NULL); | |
334 | ((u8*)&pip[1])[0] = IPOPT_RA; | |
335 | ((u8*)&pip[1])[1] = 4; | |
336 | ((u8*)&pip[1])[2] = 0; | |
337 | ((u8*)&pip[1])[3] = 0; | |
338 | ||
b0e380b1 | 339 | skb->transport_header = skb->network_header + sizeof(struct iphdr) + 4; |
d10ba34b | 340 | skb_put(skb, sizeof(*pig)); |
d9edf9e2 | 341 | pig = igmpv3_report_hdr(skb); |
1da177e4 LT |
342 | pig->type = IGMPV3_HOST_MEMBERSHIP_REPORT; |
343 | pig->resv1 = 0; | |
344 | pig->csum = 0; | |
345 | pig->resv2 = 0; | |
346 | pig->ngrec = 0; | |
347 | return skb; | |
348 | } | |
349 | ||
350 | static int igmpv3_sendpack(struct sk_buff *skb) | |
351 | { | |
d9edf9e2 | 352 | struct igmphdr *pig = igmp_hdr(skb); |
27a884dc | 353 | const int igmplen = skb->tail - skb->transport_header; |
1da177e4 | 354 | |
d9edf9e2 | 355 | pig->csum = ip_compute_csum(igmp_hdr(skb), igmplen); |
1da177e4 | 356 | |
c439cb2e | 357 | return ip_local_out(skb); |
1da177e4 LT |
358 | } |
359 | ||
360 | static int grec_size(struct ip_mc_list *pmc, int type, int gdel, int sdel) | |
361 | { | |
362 | return sizeof(struct igmpv3_grec) + 4*igmp_scount(pmc,type,gdel,sdel); | |
363 | } | |
364 | ||
365 | static struct sk_buff *add_grhead(struct sk_buff *skb, struct ip_mc_list *pmc, | |
366 | int type, struct igmpv3_grec **ppgr) | |
367 | { | |
368 | struct net_device *dev = pmc->interface->dev; | |
369 | struct igmpv3_report *pih; | |
370 | struct igmpv3_grec *pgr; | |
371 | ||
372 | if (!skb) | |
373 | skb = igmpv3_newpack(dev, dev->mtu); | |
374 | if (!skb) | |
375 | return NULL; | |
376 | pgr = (struct igmpv3_grec *)skb_put(skb, sizeof(struct igmpv3_grec)); | |
377 | pgr->grec_type = type; | |
378 | pgr->grec_auxwords = 0; | |
379 | pgr->grec_nsrcs = 0; | |
380 | pgr->grec_mca = pmc->multiaddr; | |
d9edf9e2 | 381 | pih = igmpv3_report_hdr(skb); |
1da177e4 LT |
382 | pih->ngrec = htons(ntohs(pih->ngrec)+1); |
383 | *ppgr = pgr; | |
384 | return skb; | |
385 | } | |
386 | ||
387 | #define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \ | |
388 | skb_tailroom(skb)) : 0) | |
389 | ||
390 | static struct sk_buff *add_grec(struct sk_buff *skb, struct ip_mc_list *pmc, | |
391 | int type, int gdeleted, int sdeleted) | |
392 | { | |
393 | struct net_device *dev = pmc->interface->dev; | |
394 | struct igmpv3_report *pih; | |
395 | struct igmpv3_grec *pgr = NULL; | |
396 | struct ip_sf_list *psf, *psf_next, *psf_prev, **psf_list; | |
ad12583f | 397 | int scount, stotal, first, isquery, truncate; |
1da177e4 LT |
398 | |
399 | if (pmc->multiaddr == IGMP_ALL_HOSTS) | |
400 | return skb; | |
401 | ||
402 | isquery = type == IGMPV3_MODE_IS_INCLUDE || | |
403 | type == IGMPV3_MODE_IS_EXCLUDE; | |
404 | truncate = type == IGMPV3_MODE_IS_EXCLUDE || | |
405 | type == IGMPV3_CHANGE_TO_EXCLUDE; | |
406 | ||
ad12583f DS |
407 | stotal = scount = 0; |
408 | ||
1da177e4 LT |
409 | psf_list = sdeleted ? &pmc->tomb : &pmc->sources; |
410 | ||
ad12583f DS |
411 | if (!*psf_list) |
412 | goto empty_source; | |
413 | ||
d9edf9e2 | 414 | pih = skb ? igmpv3_report_hdr(skb) : NULL; |
1da177e4 LT |
415 | |
416 | /* EX and TO_EX get a fresh packet, if needed */ | |
417 | if (truncate) { | |
418 | if (pih && pih->ngrec && | |
419 | AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) { | |
420 | if (skb) | |
421 | igmpv3_sendpack(skb); | |
422 | skb = igmpv3_newpack(dev, dev->mtu); | |
423 | } | |
424 | } | |
425 | first = 1; | |
1da177e4 LT |
426 | psf_prev = NULL; |
427 | for (psf=*psf_list; psf; psf=psf_next) { | |
ea4d9e72 | 428 | __be32 *psrc; |
1da177e4 LT |
429 | |
430 | psf_next = psf->sf_next; | |
431 | ||
432 | if (!is_in(pmc, psf, type, gdeleted, sdeleted)) { | |
433 | psf_prev = psf; | |
434 | continue; | |
435 | } | |
436 | ||
437 | /* clear marks on query responses */ | |
438 | if (isquery) | |
439 | psf->sf_gsresp = 0; | |
440 | ||
63007727 | 441 | if (AVAILABLE(skb) < sizeof(__be32) + |
1da177e4 LT |
442 | first*sizeof(struct igmpv3_grec)) { |
443 | if (truncate && !first) | |
444 | break; /* truncate these */ | |
445 | if (pgr) | |
446 | pgr->grec_nsrcs = htons(scount); | |
447 | if (skb) | |
448 | igmpv3_sendpack(skb); | |
449 | skb = igmpv3_newpack(dev, dev->mtu); | |
450 | first = 1; | |
451 | scount = 0; | |
452 | } | |
453 | if (first) { | |
454 | skb = add_grhead(skb, pmc, type, &pgr); | |
455 | first = 0; | |
456 | } | |
cc63f70b AD |
457 | if (!skb) |
458 | return NULL; | |
63007727 | 459 | psrc = (__be32 *)skb_put(skb, sizeof(__be32)); |
1da177e4 | 460 | *psrc = psf->sf_inaddr; |
ad12583f | 461 | scount++; stotal++; |
1da177e4 LT |
462 | if ((type == IGMPV3_ALLOW_NEW_SOURCES || |
463 | type == IGMPV3_BLOCK_OLD_SOURCES) && psf->sf_crcount) { | |
464 | psf->sf_crcount--; | |
465 | if ((sdeleted || gdeleted) && psf->sf_crcount == 0) { | |
466 | if (psf_prev) | |
467 | psf_prev->sf_next = psf->sf_next; | |
468 | else | |
469 | *psf_list = psf->sf_next; | |
470 | kfree(psf); | |
471 | continue; | |
472 | } | |
473 | } | |
474 | psf_prev = psf; | |
475 | } | |
ad12583f DS |
476 | |
477 | empty_source: | |
478 | if (!stotal) { | |
479 | if (type == IGMPV3_ALLOW_NEW_SOURCES || | |
480 | type == IGMPV3_BLOCK_OLD_SOURCES) | |
481 | return skb; | |
482 | if (pmc->crcount || isquery) { | |
483 | /* make sure we have room for group header */ | |
484 | if (skb && AVAILABLE(skb)<sizeof(struct igmpv3_grec)) { | |
485 | igmpv3_sendpack(skb); | |
486 | skb = NULL; /* add_grhead will get a new one */ | |
487 | } | |
488 | skb = add_grhead(skb, pmc, type, &pgr); | |
489 | } | |
490 | } | |
1da177e4 LT |
491 | if (pgr) |
492 | pgr->grec_nsrcs = htons(scount); | |
493 | ||
494 | if (isquery) | |
495 | pmc->gsquery = 0; /* clear query state on report */ | |
496 | return skb; | |
497 | } | |
498 | ||
499 | static int igmpv3_send_report(struct in_device *in_dev, struct ip_mc_list *pmc) | |
500 | { | |
501 | struct sk_buff *skb = NULL; | |
502 | int type; | |
503 | ||
504 | if (!pmc) { | |
505 | read_lock(&in_dev->mc_list_lock); | |
506 | for (pmc=in_dev->mc_list; pmc; pmc=pmc->next) { | |
507 | if (pmc->multiaddr == IGMP_ALL_HOSTS) | |
508 | continue; | |
509 | spin_lock_bh(&pmc->lock); | |
510 | if (pmc->sfcount[MCAST_EXCLUDE]) | |
511 | type = IGMPV3_MODE_IS_EXCLUDE; | |
512 | else | |
513 | type = IGMPV3_MODE_IS_INCLUDE; | |
514 | skb = add_grec(skb, pmc, type, 0, 0); | |
515 | spin_unlock_bh(&pmc->lock); | |
516 | } | |
517 | read_unlock(&in_dev->mc_list_lock); | |
518 | } else { | |
519 | spin_lock_bh(&pmc->lock); | |
520 | if (pmc->sfcount[MCAST_EXCLUDE]) | |
521 | type = IGMPV3_MODE_IS_EXCLUDE; | |
522 | else | |
523 | type = IGMPV3_MODE_IS_INCLUDE; | |
524 | skb = add_grec(skb, pmc, type, 0, 0); | |
525 | spin_unlock_bh(&pmc->lock); | |
526 | } | |
527 | if (!skb) | |
528 | return 0; | |
529 | return igmpv3_sendpack(skb); | |
530 | } | |
531 | ||
532 | /* | |
533 | * remove zero-count source records from a source filter list | |
534 | */ | |
535 | static void igmpv3_clear_zeros(struct ip_sf_list **ppsf) | |
536 | { | |
537 | struct ip_sf_list *psf_prev, *psf_next, *psf; | |
538 | ||
539 | psf_prev = NULL; | |
540 | for (psf=*ppsf; psf; psf = psf_next) { | |
541 | psf_next = psf->sf_next; | |
542 | if (psf->sf_crcount == 0) { | |
543 | if (psf_prev) | |
544 | psf_prev->sf_next = psf->sf_next; | |
545 | else | |
546 | *ppsf = psf->sf_next; | |
547 | kfree(psf); | |
548 | } else | |
549 | psf_prev = psf; | |
550 | } | |
551 | } | |
552 | ||
553 | static void igmpv3_send_cr(struct in_device *in_dev) | |
554 | { | |
555 | struct ip_mc_list *pmc, *pmc_prev, *pmc_next; | |
556 | struct sk_buff *skb = NULL; | |
557 | int type, dtype; | |
558 | ||
559 | read_lock(&in_dev->mc_list_lock); | |
560 | spin_lock_bh(&in_dev->mc_tomb_lock); | |
561 | ||
562 | /* deleted MCA's */ | |
563 | pmc_prev = NULL; | |
564 | for (pmc=in_dev->mc_tomb; pmc; pmc=pmc_next) { | |
565 | pmc_next = pmc->next; | |
566 | if (pmc->sfmode == MCAST_INCLUDE) { | |
567 | type = IGMPV3_BLOCK_OLD_SOURCES; | |
568 | dtype = IGMPV3_BLOCK_OLD_SOURCES; | |
569 | skb = add_grec(skb, pmc, type, 1, 0); | |
570 | skb = add_grec(skb, pmc, dtype, 1, 1); | |
571 | } | |
572 | if (pmc->crcount) { | |
1da177e4 LT |
573 | if (pmc->sfmode == MCAST_EXCLUDE) { |
574 | type = IGMPV3_CHANGE_TO_INCLUDE; | |
575 | skb = add_grec(skb, pmc, type, 1, 0); | |
576 | } | |
ad12583f | 577 | pmc->crcount--; |
1da177e4 LT |
578 | if (pmc->crcount == 0) { |
579 | igmpv3_clear_zeros(&pmc->tomb); | |
580 | igmpv3_clear_zeros(&pmc->sources); | |
581 | } | |
582 | } | |
583 | if (pmc->crcount == 0 && !pmc->tomb && !pmc->sources) { | |
584 | if (pmc_prev) | |
585 | pmc_prev->next = pmc_next; | |
586 | else | |
587 | in_dev->mc_tomb = pmc_next; | |
588 | in_dev_put(pmc->interface); | |
589 | kfree(pmc); | |
590 | } else | |
591 | pmc_prev = pmc; | |
592 | } | |
593 | spin_unlock_bh(&in_dev->mc_tomb_lock); | |
594 | ||
595 | /* change recs */ | |
596 | for (pmc=in_dev->mc_list; pmc; pmc=pmc->next) { | |
597 | spin_lock_bh(&pmc->lock); | |
598 | if (pmc->sfcount[MCAST_EXCLUDE]) { | |
599 | type = IGMPV3_BLOCK_OLD_SOURCES; | |
600 | dtype = IGMPV3_ALLOW_NEW_SOURCES; | |
601 | } else { | |
602 | type = IGMPV3_ALLOW_NEW_SOURCES; | |
603 | dtype = IGMPV3_BLOCK_OLD_SOURCES; | |
604 | } | |
605 | skb = add_grec(skb, pmc, type, 0, 0); | |
606 | skb = add_grec(skb, pmc, dtype, 0, 1); /* deleted sources */ | |
607 | ||
608 | /* filter mode changes */ | |
609 | if (pmc->crcount) { | |
1da177e4 LT |
610 | if (pmc->sfmode == MCAST_EXCLUDE) |
611 | type = IGMPV3_CHANGE_TO_EXCLUDE; | |
612 | else | |
613 | type = IGMPV3_CHANGE_TO_INCLUDE; | |
614 | skb = add_grec(skb, pmc, type, 0, 0); | |
ad12583f | 615 | pmc->crcount--; |
1da177e4 LT |
616 | } |
617 | spin_unlock_bh(&pmc->lock); | |
618 | } | |
619 | read_unlock(&in_dev->mc_list_lock); | |
620 | ||
621 | if (!skb) | |
622 | return; | |
623 | (void) igmpv3_sendpack(skb); | |
624 | } | |
625 | ||
626 | static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc, | |
627 | int type) | |
628 | { | |
629 | struct sk_buff *skb; | |
630 | struct iphdr *iph; | |
631 | struct igmphdr *ih; | |
632 | struct rtable *rt; | |
633 | struct net_device *dev = in_dev->dev; | |
63007727 AV |
634 | __be32 group = pmc ? pmc->multiaddr : 0; |
635 | __be32 dst; | |
1da177e4 LT |
636 | |
637 | if (type == IGMPV3_HOST_MEMBERSHIP_REPORT) | |
638 | return igmpv3_send_report(in_dev, pmc); | |
639 | else if (type == IGMP_HOST_LEAVE_MESSAGE) | |
640 | dst = IGMP_ALL_ROUTER; | |
641 | else | |
642 | dst = group; | |
643 | ||
644 | { | |
645 | struct flowi fl = { .oif = dev->ifindex, | |
646 | .nl_u = { .ip4_u = { .daddr = dst } }, | |
647 | .proto = IPPROTO_IGMP }; | |
f206351a | 648 | if (ip_route_output_key(&init_net, &rt, &fl)) |
1da177e4 LT |
649 | return -1; |
650 | } | |
651 | if (rt->rt_src == 0) { | |
652 | ip_rt_put(rt); | |
653 | return -1; | |
654 | } | |
655 | ||
656 | skb=alloc_skb(IGMP_SIZE+LL_RESERVED_SPACE(dev), GFP_ATOMIC); | |
657 | if (skb == NULL) { | |
658 | ip_rt_put(rt); | |
659 | return -1; | |
660 | } | |
661 | ||
662 | skb->dst = &rt->u.dst; | |
663 | ||
664 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); | |
665 | ||
7e28ecc2 | 666 | skb_reset_network_header(skb); |
eddc9ec5 | 667 | iph = ip_hdr(skb); |
7e28ecc2 | 668 | skb_put(skb, sizeof(struct iphdr) + 4); |
1da177e4 LT |
669 | |
670 | iph->version = 4; | |
671 | iph->ihl = (sizeof(struct iphdr)+4)>>2; | |
672 | iph->tos = 0xc0; | |
673 | iph->frag_off = htons(IP_DF); | |
674 | iph->ttl = 1; | |
675 | iph->daddr = dst; | |
676 | iph->saddr = rt->rt_src; | |
677 | iph->protocol = IPPROTO_IGMP; | |
1da177e4 LT |
678 | ip_select_ident(iph, &rt->u.dst, NULL); |
679 | ((u8*)&iph[1])[0] = IPOPT_RA; | |
680 | ((u8*)&iph[1])[1] = 4; | |
681 | ((u8*)&iph[1])[2] = 0; | |
682 | ((u8*)&iph[1])[3] = 0; | |
1da177e4 LT |
683 | |
684 | ih = (struct igmphdr *)skb_put(skb, sizeof(struct igmphdr)); | |
685 | ih->type=type; | |
686 | ih->code=0; | |
687 | ih->csum=0; | |
688 | ih->group=group; | |
689 | ih->csum=ip_compute_csum((void *)ih, sizeof(struct igmphdr)); | |
690 | ||
c439cb2e | 691 | return ip_local_out(skb); |
1da177e4 LT |
692 | } |
693 | ||
694 | static void igmp_gq_timer_expire(unsigned long data) | |
695 | { | |
696 | struct in_device *in_dev = (struct in_device *)data; | |
697 | ||
698 | in_dev->mr_gq_running = 0; | |
699 | igmpv3_send_report(in_dev, NULL); | |
700 | __in_dev_put(in_dev); | |
701 | } | |
702 | ||
703 | static void igmp_ifc_timer_expire(unsigned long data) | |
704 | { | |
705 | struct in_device *in_dev = (struct in_device *)data; | |
706 | ||
707 | igmpv3_send_cr(in_dev); | |
708 | if (in_dev->mr_ifc_count) { | |
709 | in_dev->mr_ifc_count--; | |
710 | igmp_ifc_start_timer(in_dev, IGMP_Unsolicited_Report_Interval); | |
711 | } | |
712 | __in_dev_put(in_dev); | |
713 | } | |
714 | ||
715 | static void igmp_ifc_event(struct in_device *in_dev) | |
716 | { | |
717 | if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev)) | |
718 | return; | |
e905a9ed | 719 | in_dev->mr_ifc_count = in_dev->mr_qrv ? in_dev->mr_qrv : |
1da177e4 LT |
720 | IGMP_Unsolicited_Report_Count; |
721 | igmp_ifc_start_timer(in_dev, 1); | |
722 | } | |
723 | ||
724 | ||
725 | static void igmp_timer_expire(unsigned long data) | |
726 | { | |
727 | struct ip_mc_list *im=(struct ip_mc_list *)data; | |
728 | struct in_device *in_dev = im->interface; | |
729 | ||
730 | spin_lock(&im->lock); | |
731 | im->tm_running=0; | |
732 | ||
733 | if (im->unsolicit_count) { | |
734 | im->unsolicit_count--; | |
735 | igmp_start_timer(im, IGMP_Unsolicited_Report_Interval); | |
736 | } | |
737 | im->reporter = 1; | |
738 | spin_unlock(&im->lock); | |
739 | ||
740 | if (IGMP_V1_SEEN(in_dev)) | |
741 | igmp_send_report(in_dev, im, IGMP_HOST_MEMBERSHIP_REPORT); | |
742 | else if (IGMP_V2_SEEN(in_dev)) | |
743 | igmp_send_report(in_dev, im, IGMPV2_HOST_MEMBERSHIP_REPORT); | |
744 | else | |
745 | igmp_send_report(in_dev, im, IGMPV3_HOST_MEMBERSHIP_REPORT); | |
746 | ||
747 | ip_ma_put(im); | |
748 | } | |
749 | ||
ad12583f | 750 | /* mark EXCLUDE-mode sources */ |
ea4d9e72 | 751 | static int igmp_xmarksources(struct ip_mc_list *pmc, int nsrcs, __be32 *srcs) |
1da177e4 LT |
752 | { |
753 | struct ip_sf_list *psf; | |
754 | int i, scount; | |
755 | ||
ad12583f DS |
756 | scount = 0; |
757 | for (psf=pmc->sources; psf; psf=psf->sf_next) { | |
758 | if (scount == nsrcs) | |
759 | break; | |
760 | for (i=0; i<nsrcs; i++) { | |
761 | /* skip inactive filters */ | |
762 | if (pmc->sfcount[MCAST_INCLUDE] || | |
763 | pmc->sfcount[MCAST_EXCLUDE] != | |
764 | psf->sf_count[MCAST_EXCLUDE]) | |
765 | continue; | |
766 | if (srcs[i] == psf->sf_inaddr) { | |
767 | scount++; | |
768 | break; | |
769 | } | |
770 | } | |
771 | } | |
772 | pmc->gsquery = 0; | |
773 | if (scount == nsrcs) /* all sources excluded */ | |
774 | return 0; | |
775 | return 1; | |
776 | } | |
777 | ||
ea4d9e72 | 778 | static int igmp_marksources(struct ip_mc_list *pmc, int nsrcs, __be32 *srcs) |
ad12583f DS |
779 | { |
780 | struct ip_sf_list *psf; | |
781 | int i, scount; | |
782 | ||
783 | if (pmc->sfmode == MCAST_EXCLUDE) | |
784 | return igmp_xmarksources(pmc, nsrcs, srcs); | |
785 | ||
786 | /* mark INCLUDE-mode sources */ | |
1da177e4 LT |
787 | scount = 0; |
788 | for (psf=pmc->sources; psf; psf=psf->sf_next) { | |
789 | if (scount == nsrcs) | |
790 | break; | |
791 | for (i=0; i<nsrcs; i++) | |
792 | if (srcs[i] == psf->sf_inaddr) { | |
793 | psf->sf_gsresp = 1; | |
794 | scount++; | |
795 | break; | |
796 | } | |
797 | } | |
ad12583f DS |
798 | if (!scount) { |
799 | pmc->gsquery = 0; | |
800 | return 0; | |
801 | } | |
802 | pmc->gsquery = 1; | |
803 | return 1; | |
1da177e4 LT |
804 | } |
805 | ||
63007727 | 806 | static void igmp_heard_report(struct in_device *in_dev, __be32 group) |
1da177e4 LT |
807 | { |
808 | struct ip_mc_list *im; | |
809 | ||
810 | /* Timers are only set for non-local groups */ | |
811 | ||
812 | if (group == IGMP_ALL_HOSTS) | |
813 | return; | |
814 | ||
815 | read_lock(&in_dev->mc_list_lock); | |
816 | for (im=in_dev->mc_list; im!=NULL; im=im->next) { | |
817 | if (im->multiaddr == group) { | |
818 | igmp_stop_timer(im); | |
819 | break; | |
820 | } | |
821 | } | |
822 | read_unlock(&in_dev->mc_list_lock); | |
823 | } | |
824 | ||
825 | static void igmp_heard_query(struct in_device *in_dev, struct sk_buff *skb, | |
826 | int len) | |
827 | { | |
d9edf9e2 ACM |
828 | struct igmphdr *ih = igmp_hdr(skb); |
829 | struct igmpv3_query *ih3 = igmpv3_query_hdr(skb); | |
1da177e4 | 830 | struct ip_mc_list *im; |
63007727 | 831 | __be32 group = ih->group; |
1da177e4 LT |
832 | int max_delay; |
833 | int mark = 0; | |
834 | ||
835 | ||
836 | if (len == 8) { | |
837 | if (ih->code == 0) { | |
838 | /* Alas, old v1 router presents here. */ | |
e905a9ed | 839 | |
1da177e4 LT |
840 | max_delay = IGMP_Query_Response_Interval; |
841 | in_dev->mr_v1_seen = jiffies + | |
842 | IGMP_V1_Router_Present_Timeout; | |
843 | group = 0; | |
844 | } else { | |
845 | /* v2 router present */ | |
846 | max_delay = ih->code*(HZ/IGMP_TIMER_SCALE); | |
847 | in_dev->mr_v2_seen = jiffies + | |
848 | IGMP_V2_Router_Present_Timeout; | |
849 | } | |
850 | /* cancel the interface change timer */ | |
851 | in_dev->mr_ifc_count = 0; | |
852 | if (del_timer(&in_dev->mr_ifc_timer)) | |
853 | __in_dev_put(in_dev); | |
854 | /* clear deleted report items */ | |
855 | igmpv3_clear_delrec(in_dev); | |
856 | } else if (len < 12) { | |
857 | return; /* ignore bogus packet; freed by caller */ | |
858 | } else { /* v3 */ | |
859 | if (!pskb_may_pull(skb, sizeof(struct igmpv3_query))) | |
860 | return; | |
e905a9ed | 861 | |
d9edf9e2 | 862 | ih3 = igmpv3_query_hdr(skb); |
1da177e4 | 863 | if (ih3->nsrcs) { |
e905a9ed | 864 | if (!pskb_may_pull(skb, sizeof(struct igmpv3_query) |
63007727 | 865 | + ntohs(ih3->nsrcs)*sizeof(__be32))) |
1da177e4 | 866 | return; |
d9edf9e2 | 867 | ih3 = igmpv3_query_hdr(skb); |
1da177e4 LT |
868 | } |
869 | ||
870 | max_delay = IGMPV3_MRC(ih3->code)*(HZ/IGMP_TIMER_SCALE); | |
871 | if (!max_delay) | |
872 | max_delay = 1; /* can't mod w/ 0 */ | |
873 | in_dev->mr_maxdelay = max_delay; | |
874 | if (ih3->qrv) | |
875 | in_dev->mr_qrv = ih3->qrv; | |
876 | if (!group) { /* general query */ | |
877 | if (ih3->nsrcs) | |
878 | return; /* no sources allowed */ | |
879 | igmp_gq_start_timer(in_dev); | |
880 | return; | |
881 | } | |
882 | /* mark sources to include, if group & source-specific */ | |
883 | mark = ih3->nsrcs != 0; | |
884 | } | |
885 | ||
886 | /* | |
887 | * - Start the timers in all of our membership records | |
888 | * that the query applies to for the interface on | |
889 | * which the query arrived excl. those that belong | |
890 | * to a "local" group (224.0.0.X) | |
891 | * - For timers already running check if they need to | |
892 | * be reset. | |
893 | * - Use the igmp->igmp_code field as the maximum | |
894 | * delay possible | |
895 | */ | |
896 | read_lock(&in_dev->mc_list_lock); | |
897 | for (im=in_dev->mc_list; im!=NULL; im=im->next) { | |
ad12583f DS |
898 | int changed; |
899 | ||
1da177e4 LT |
900 | if (group && group != im->multiaddr) |
901 | continue; | |
902 | if (im->multiaddr == IGMP_ALL_HOSTS) | |
903 | continue; | |
904 | spin_lock_bh(&im->lock); | |
905 | if (im->tm_running) | |
906 | im->gsquery = im->gsquery && mark; | |
907 | else | |
908 | im->gsquery = mark; | |
ad12583f | 909 | changed = !im->gsquery || |
e905a9ed | 910 | igmp_marksources(im, ntohs(ih3->nsrcs), ih3->srcs); |
1da177e4 | 911 | spin_unlock_bh(&im->lock); |
ad12583f DS |
912 | if (changed) |
913 | igmp_mod_timer(im, max_delay); | |
1da177e4 LT |
914 | } |
915 | read_unlock(&in_dev->mc_list_lock); | |
916 | } | |
917 | ||
918 | int igmp_rcv(struct sk_buff *skb) | |
919 | { | |
920 | /* This basically follows the spec line by line -- see RFC1112 */ | |
921 | struct igmphdr *ih; | |
922 | struct in_device *in_dev = in_dev_get(skb->dev); | |
923 | int len = skb->len; | |
924 | ||
925 | if (in_dev==NULL) { | |
926 | kfree_skb(skb); | |
927 | return 0; | |
928 | } | |
929 | ||
fb286bb2 HX |
930 | if (!pskb_may_pull(skb, sizeof(struct igmphdr))) |
931 | goto drop; | |
932 | ||
933 | switch (skb->ip_summed) { | |
84fa7933 | 934 | case CHECKSUM_COMPLETE: |
d3bc23e7 | 935 | if (!csum_fold(skb->csum)) |
fb286bb2 HX |
936 | break; |
937 | /* fall through */ | |
938 | case CHECKSUM_NONE: | |
939 | skb->csum = 0; | |
940 | if (__skb_checksum_complete(skb)) | |
941 | goto drop; | |
1da177e4 LT |
942 | } |
943 | ||
d9edf9e2 | 944 | ih = igmp_hdr(skb); |
1da177e4 LT |
945 | switch (ih->type) { |
946 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
947 | igmp_heard_query(in_dev, skb, len); | |
948 | break; | |
949 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
950 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
951 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
952 | /* Is it our report looped back? */ | |
953 | if (((struct rtable*)skb->dst)->fl.iif == 0) | |
954 | break; | |
24c69275 DS |
955 | /* don't rely on MC router hearing unicast reports */ |
956 | if (skb->pkt_type == PACKET_MULTICAST || | |
957 | skb->pkt_type == PACKET_BROADCAST) | |
958 | igmp_heard_report(in_dev, ih->group); | |
1da177e4 LT |
959 | break; |
960 | case IGMP_PIM: | |
961 | #ifdef CONFIG_IP_PIMSM_V1 | |
962 | in_dev_put(in_dev); | |
963 | return pim_rcv_v1(skb); | |
964 | #endif | |
965 | case IGMP_DVMRP: | |
966 | case IGMP_TRACE: | |
967 | case IGMP_HOST_LEAVE_MESSAGE: | |
968 | case IGMP_MTRACE: | |
969 | case IGMP_MTRACE_RESP: | |
970 | break; | |
971 | default: | |
dd1c1853 | 972 | break; |
1da177e4 | 973 | } |
fb286bb2 HX |
974 | |
975 | drop: | |
1da177e4 LT |
976 | in_dev_put(in_dev); |
977 | kfree_skb(skb); | |
978 | return 0; | |
979 | } | |
980 | ||
981 | #endif | |
982 | ||
983 | ||
984 | /* | |
985 | * Add a filter to a device | |
986 | */ | |
987 | ||
63007727 | 988 | static void ip_mc_filter_add(struct in_device *in_dev, __be32 addr) |
1da177e4 LT |
989 | { |
990 | char buf[MAX_ADDR_LEN]; | |
991 | struct net_device *dev = in_dev->dev; | |
992 | ||
993 | /* Checking for IFF_MULTICAST here is WRONG-WRONG-WRONG. | |
994 | We will get multicast token leakage, when IFF_MULTICAST | |
995 | is changed. This check should be done in dev->set_multicast_list | |
996 | routine. Something sort of: | |
997 | if (dev->mc_list && dev->flags&IFF_MULTICAST) { do it; } | |
998 | --ANK | |
999 | */ | |
1000 | if (arp_mc_map(addr, buf, dev, 0) == 0) | |
1001 | dev_mc_add(dev,buf,dev->addr_len,0); | |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | * Remove a filter from a device | |
1006 | */ | |
1007 | ||
63007727 | 1008 | static void ip_mc_filter_del(struct in_device *in_dev, __be32 addr) |
1da177e4 LT |
1009 | { |
1010 | char buf[MAX_ADDR_LEN]; | |
1011 | struct net_device *dev = in_dev->dev; | |
1012 | ||
1013 | if (arp_mc_map(addr, buf, dev, 0) == 0) | |
1014 | dev_mc_delete(dev,buf,dev->addr_len,0); | |
1015 | } | |
1016 | ||
1017 | #ifdef CONFIG_IP_MULTICAST | |
1018 | /* | |
1019 | * deleted ip_mc_list manipulation | |
1020 | */ | |
1021 | static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im) | |
1022 | { | |
1023 | struct ip_mc_list *pmc; | |
1024 | ||
1025 | /* this is an "ip_mc_list" for convenience; only the fields below | |
1026 | * are actually used. In particular, the refcnt and users are not | |
1027 | * used for management of the delete list. Using the same structure | |
1028 | * for deleted items allows change reports to use common code with | |
1029 | * non-deleted or query-response MCA's. | |
1030 | */ | |
0da974f4 | 1031 | pmc = kzalloc(sizeof(*pmc), GFP_KERNEL); |
1da177e4 LT |
1032 | if (!pmc) |
1033 | return; | |
1da177e4 LT |
1034 | spin_lock_bh(&im->lock); |
1035 | pmc->interface = im->interface; | |
1036 | in_dev_hold(in_dev); | |
1037 | pmc->multiaddr = im->multiaddr; | |
1038 | pmc->crcount = in_dev->mr_qrv ? in_dev->mr_qrv : | |
1039 | IGMP_Unsolicited_Report_Count; | |
1040 | pmc->sfmode = im->sfmode; | |
1041 | if (pmc->sfmode == MCAST_INCLUDE) { | |
1042 | struct ip_sf_list *psf; | |
1043 | ||
1044 | pmc->tomb = im->tomb; | |
1045 | pmc->sources = im->sources; | |
1046 | im->tomb = im->sources = NULL; | |
1047 | for (psf=pmc->sources; psf; psf=psf->sf_next) | |
1048 | psf->sf_crcount = pmc->crcount; | |
1049 | } | |
1050 | spin_unlock_bh(&im->lock); | |
1051 | ||
1052 | spin_lock_bh(&in_dev->mc_tomb_lock); | |
1053 | pmc->next = in_dev->mc_tomb; | |
1054 | in_dev->mc_tomb = pmc; | |
1055 | spin_unlock_bh(&in_dev->mc_tomb_lock); | |
1056 | } | |
1057 | ||
63007727 | 1058 | static void igmpv3_del_delrec(struct in_device *in_dev, __be32 multiaddr) |
1da177e4 LT |
1059 | { |
1060 | struct ip_mc_list *pmc, *pmc_prev; | |
1061 | struct ip_sf_list *psf, *psf_next; | |
1062 | ||
1063 | spin_lock_bh(&in_dev->mc_tomb_lock); | |
1064 | pmc_prev = NULL; | |
1065 | for (pmc=in_dev->mc_tomb; pmc; pmc=pmc->next) { | |
1066 | if (pmc->multiaddr == multiaddr) | |
1067 | break; | |
1068 | pmc_prev = pmc; | |
1069 | } | |
1070 | if (pmc) { | |
1071 | if (pmc_prev) | |
1072 | pmc_prev->next = pmc->next; | |
1073 | else | |
1074 | in_dev->mc_tomb = pmc->next; | |
1075 | } | |
1076 | spin_unlock_bh(&in_dev->mc_tomb_lock); | |
1077 | if (pmc) { | |
1078 | for (psf=pmc->tomb; psf; psf=psf_next) { | |
1079 | psf_next = psf->sf_next; | |
1080 | kfree(psf); | |
1081 | } | |
1082 | in_dev_put(pmc->interface); | |
1083 | kfree(pmc); | |
1084 | } | |
1085 | } | |
1086 | ||
1087 | static void igmpv3_clear_delrec(struct in_device *in_dev) | |
1088 | { | |
1089 | struct ip_mc_list *pmc, *nextpmc; | |
1090 | ||
1091 | spin_lock_bh(&in_dev->mc_tomb_lock); | |
1092 | pmc = in_dev->mc_tomb; | |
1093 | in_dev->mc_tomb = NULL; | |
1094 | spin_unlock_bh(&in_dev->mc_tomb_lock); | |
1095 | ||
1096 | for (; pmc; pmc = nextpmc) { | |
1097 | nextpmc = pmc->next; | |
1098 | ip_mc_clear_src(pmc); | |
1099 | in_dev_put(pmc->interface); | |
1100 | kfree(pmc); | |
1101 | } | |
1102 | /* clear dead sources, too */ | |
1103 | read_lock(&in_dev->mc_list_lock); | |
1104 | for (pmc=in_dev->mc_list; pmc; pmc=pmc->next) { | |
1105 | struct ip_sf_list *psf, *psf_next; | |
1106 | ||
1107 | spin_lock_bh(&pmc->lock); | |
1108 | psf = pmc->tomb; | |
1109 | pmc->tomb = NULL; | |
1110 | spin_unlock_bh(&pmc->lock); | |
1111 | for (; psf; psf=psf_next) { | |
1112 | psf_next = psf->sf_next; | |
1113 | kfree(psf); | |
1114 | } | |
1115 | } | |
1116 | read_unlock(&in_dev->mc_list_lock); | |
1117 | } | |
1118 | #endif | |
1119 | ||
1120 | static void igmp_group_dropped(struct ip_mc_list *im) | |
1121 | { | |
1122 | struct in_device *in_dev = im->interface; | |
1123 | #ifdef CONFIG_IP_MULTICAST | |
1124 | int reporter; | |
1125 | #endif | |
1126 | ||
1127 | if (im->loaded) { | |
1128 | im->loaded = 0; | |
1129 | ip_mc_filter_del(in_dev, im->multiaddr); | |
1130 | } | |
1131 | ||
1132 | #ifdef CONFIG_IP_MULTICAST | |
1133 | if (im->multiaddr == IGMP_ALL_HOSTS) | |
1134 | return; | |
1135 | ||
1136 | reporter = im->reporter; | |
1137 | igmp_stop_timer(im); | |
1138 | ||
1139 | if (!in_dev->dead) { | |
1140 | if (IGMP_V1_SEEN(in_dev)) | |
1141 | goto done; | |
1142 | if (IGMP_V2_SEEN(in_dev)) { | |
1143 | if (reporter) | |
1144 | igmp_send_report(in_dev, im, IGMP_HOST_LEAVE_MESSAGE); | |
1145 | goto done; | |
1146 | } | |
1147 | /* IGMPv3 */ | |
1148 | igmpv3_add_delrec(in_dev, im); | |
1149 | ||
1150 | igmp_ifc_event(in_dev); | |
1151 | } | |
1152 | done: | |
1153 | #endif | |
1154 | ip_mc_clear_src(im); | |
1155 | } | |
1156 | ||
1157 | static void igmp_group_added(struct ip_mc_list *im) | |
1158 | { | |
1159 | struct in_device *in_dev = im->interface; | |
1160 | ||
1161 | if (im->loaded == 0) { | |
1162 | im->loaded = 1; | |
1163 | ip_mc_filter_add(in_dev, im->multiaddr); | |
1164 | } | |
1165 | ||
1166 | #ifdef CONFIG_IP_MULTICAST | |
1167 | if (im->multiaddr == IGMP_ALL_HOSTS) | |
1168 | return; | |
1169 | ||
1170 | if (in_dev->dead) | |
1171 | return; | |
1172 | if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev)) { | |
1173 | spin_lock_bh(&im->lock); | |
1174 | igmp_start_timer(im, IGMP_Initial_Report_Delay); | |
1175 | spin_unlock_bh(&im->lock); | |
1176 | return; | |
1177 | } | |
1178 | /* else, v3 */ | |
1179 | ||
1180 | im->crcount = in_dev->mr_qrv ? in_dev->mr_qrv : | |
1181 | IGMP_Unsolicited_Report_Count; | |
1182 | igmp_ifc_event(in_dev); | |
1183 | #endif | |
1184 | } | |
1185 | ||
1186 | ||
1187 | /* | |
1188 | * Multicast list managers | |
1189 | */ | |
1190 | ||
1191 | ||
1192 | /* | |
1193 | * A socket has joined a multicast group on device dev. | |
1194 | */ | |
1195 | ||
8f935bbd | 1196 | void ip_mc_inc_group(struct in_device *in_dev, __be32 addr) |
1da177e4 LT |
1197 | { |
1198 | struct ip_mc_list *im; | |
1199 | ||
1200 | ASSERT_RTNL(); | |
1201 | ||
1202 | for (im=in_dev->mc_list; im; im=im->next) { | |
1203 | if (im->multiaddr == addr) { | |
1204 | im->users++; | |
1205 | ip_mc_add_src(in_dev, &addr, MCAST_EXCLUDE, 0, NULL, 0); | |
1206 | goto out; | |
1207 | } | |
1208 | } | |
1209 | ||
8b3a7005 | 1210 | im = kmalloc(sizeof(*im), GFP_KERNEL); |
1da177e4 LT |
1211 | if (!im) |
1212 | goto out; | |
1213 | ||
1214 | im->users=1; | |
1215 | im->interface=in_dev; | |
1216 | in_dev_hold(in_dev); | |
1217 | im->multiaddr=addr; | |
1218 | /* initial mode is (EX, empty) */ | |
1219 | im->sfmode = MCAST_EXCLUDE; | |
1220 | im->sfcount[MCAST_INCLUDE] = 0; | |
1221 | im->sfcount[MCAST_EXCLUDE] = 1; | |
1222 | im->sources = NULL; | |
1223 | im->tomb = NULL; | |
1224 | im->crcount = 0; | |
1225 | atomic_set(&im->refcnt, 1); | |
1226 | spin_lock_init(&im->lock); | |
1227 | #ifdef CONFIG_IP_MULTICAST | |
1228 | im->tm_running=0; | |
b24b8a24 | 1229 | setup_timer(&im->timer, &igmp_timer_expire, (unsigned long)im); |
1da177e4 LT |
1230 | im->unsolicit_count = IGMP_Unsolicited_Report_Count; |
1231 | im->reporter = 0; | |
1232 | im->gsquery = 0; | |
1233 | #endif | |
1234 | im->loaded = 0; | |
1235 | write_lock_bh(&in_dev->mc_list_lock); | |
1236 | im->next=in_dev->mc_list; | |
1237 | in_dev->mc_list=im; | |
1238 | write_unlock_bh(&in_dev->mc_list_lock); | |
1239 | #ifdef CONFIG_IP_MULTICAST | |
1240 | igmpv3_del_delrec(in_dev, im->multiaddr); | |
1241 | #endif | |
1242 | igmp_group_added(im); | |
1243 | if (!in_dev->dead) | |
1244 | ip_rt_multicast_event(in_dev); | |
1245 | out: | |
1246 | return; | |
1247 | } | |
1248 | ||
a816c7c7 JV |
1249 | /* |
1250 | * Resend IGMP JOIN report; used for bonding. | |
1251 | */ | |
1252 | void ip_mc_rejoin_group(struct ip_mc_list *im) | |
1253 | { | |
08882669 | 1254 | #ifdef CONFIG_IP_MULTICAST |
a816c7c7 JV |
1255 | struct in_device *in_dev = im->interface; |
1256 | ||
a816c7c7 JV |
1257 | if (im->multiaddr == IGMP_ALL_HOSTS) |
1258 | return; | |
1259 | ||
1260 | if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev)) { | |
1261 | igmp_mod_timer(im, IGMP_Initial_Report_Delay); | |
1262 | return; | |
1263 | } | |
1264 | /* else, v3 */ | |
1265 | im->crcount = in_dev->mr_qrv ? in_dev->mr_qrv : | |
1266 | IGMP_Unsolicited_Report_Count; | |
1267 | igmp_ifc_event(in_dev); | |
1268 | #endif | |
1269 | } | |
1270 | ||
1da177e4 LT |
1271 | /* |
1272 | * A socket has left a multicast group on device dev | |
1273 | */ | |
1274 | ||
8f935bbd | 1275 | void ip_mc_dec_group(struct in_device *in_dev, __be32 addr) |
1da177e4 LT |
1276 | { |
1277 | struct ip_mc_list *i, **ip; | |
e905a9ed | 1278 | |
1da177e4 | 1279 | ASSERT_RTNL(); |
e905a9ed | 1280 | |
1da177e4 LT |
1281 | for (ip=&in_dev->mc_list; (i=*ip)!=NULL; ip=&i->next) { |
1282 | if (i->multiaddr==addr) { | |
1283 | if (--i->users == 0) { | |
1284 | write_lock_bh(&in_dev->mc_list_lock); | |
1285 | *ip = i->next; | |
1286 | write_unlock_bh(&in_dev->mc_list_lock); | |
1287 | igmp_group_dropped(i); | |
1288 | ||
1289 | if (!in_dev->dead) | |
1290 | ip_rt_multicast_event(in_dev); | |
1291 | ||
1292 | ip_ma_put(i); | |
1293 | return; | |
1294 | } | |
1295 | break; | |
1296 | } | |
1297 | } | |
1298 | } | |
1299 | ||
1300 | /* Device going down */ | |
1301 | ||
1302 | void ip_mc_down(struct in_device *in_dev) | |
1303 | { | |
1304 | struct ip_mc_list *i; | |
1305 | ||
1306 | ASSERT_RTNL(); | |
1307 | ||
1308 | for (i=in_dev->mc_list; i; i=i->next) | |
1309 | igmp_group_dropped(i); | |
1310 | ||
1311 | #ifdef CONFIG_IP_MULTICAST | |
1312 | in_dev->mr_ifc_count = 0; | |
1313 | if (del_timer(&in_dev->mr_ifc_timer)) | |
1314 | __in_dev_put(in_dev); | |
1315 | in_dev->mr_gq_running = 0; | |
1316 | if (del_timer(&in_dev->mr_gq_timer)) | |
1317 | __in_dev_put(in_dev); | |
1318 | igmpv3_clear_delrec(in_dev); | |
1319 | #endif | |
1320 | ||
1321 | ip_mc_dec_group(in_dev, IGMP_ALL_HOSTS); | |
1322 | } | |
1323 | ||
1324 | void ip_mc_init_dev(struct in_device *in_dev) | |
1325 | { | |
1326 | ASSERT_RTNL(); | |
1327 | ||
1328 | in_dev->mc_tomb = NULL; | |
1329 | #ifdef CONFIG_IP_MULTICAST | |
1330 | in_dev->mr_gq_running = 0; | |
b24b8a24 PE |
1331 | setup_timer(&in_dev->mr_gq_timer, igmp_gq_timer_expire, |
1332 | (unsigned long)in_dev); | |
1da177e4 | 1333 | in_dev->mr_ifc_count = 0; |
b24b8a24 PE |
1334 | setup_timer(&in_dev->mr_ifc_timer, igmp_ifc_timer_expire, |
1335 | (unsigned long)in_dev); | |
1da177e4 LT |
1336 | in_dev->mr_qrv = IGMP_Unsolicited_Report_Count; |
1337 | #endif | |
1338 | ||
1339 | rwlock_init(&in_dev->mc_list_lock); | |
1340 | spin_lock_init(&in_dev->mc_tomb_lock); | |
1341 | } | |
1342 | ||
1343 | /* Device going up */ | |
1344 | ||
1345 | void ip_mc_up(struct in_device *in_dev) | |
1346 | { | |
1347 | struct ip_mc_list *i; | |
1348 | ||
1349 | ASSERT_RTNL(); | |
1350 | ||
1351 | ip_mc_inc_group(in_dev, IGMP_ALL_HOSTS); | |
1352 | ||
1353 | for (i=in_dev->mc_list; i; i=i->next) | |
1354 | igmp_group_added(i); | |
1355 | } | |
1356 | ||
1357 | /* | |
1358 | * Device is about to be destroyed: clean up. | |
1359 | */ | |
1360 | ||
1361 | void ip_mc_destroy_dev(struct in_device *in_dev) | |
1362 | { | |
1363 | struct ip_mc_list *i; | |
1364 | ||
1365 | ASSERT_RTNL(); | |
1366 | ||
1367 | /* Deactivate timers */ | |
1368 | ip_mc_down(in_dev); | |
1369 | ||
1370 | write_lock_bh(&in_dev->mc_list_lock); | |
1371 | while ((i = in_dev->mc_list) != NULL) { | |
1372 | in_dev->mc_list = i->next; | |
1373 | write_unlock_bh(&in_dev->mc_list_lock); | |
1374 | ||
1375 | igmp_group_dropped(i); | |
1376 | ip_ma_put(i); | |
1377 | ||
1378 | write_lock_bh(&in_dev->mc_list_lock); | |
1379 | } | |
1380 | write_unlock_bh(&in_dev->mc_list_lock); | |
1381 | } | |
1382 | ||
1383 | static struct in_device * ip_mc_find_dev(struct ip_mreqn *imr) | |
1384 | { | |
1385 | struct flowi fl = { .nl_u = { .ip4_u = | |
1386 | { .daddr = imr->imr_multiaddr.s_addr } } }; | |
1387 | struct rtable *rt; | |
1388 | struct net_device *dev = NULL; | |
1389 | struct in_device *idev = NULL; | |
1390 | ||
1391 | if (imr->imr_ifindex) { | |
7fee0ca2 | 1392 | idev = inetdev_by_index(&init_net, imr->imr_ifindex); |
1da177e4 LT |
1393 | if (idev) |
1394 | __in_dev_put(idev); | |
1395 | return idev; | |
1396 | } | |
1397 | if (imr->imr_address.s_addr) { | |
1ab35276 | 1398 | dev = ip_dev_find(&init_net, imr->imr_address.s_addr); |
1da177e4 LT |
1399 | if (!dev) |
1400 | return NULL; | |
15333061 | 1401 | dev_put(dev); |
1da177e4 LT |
1402 | } |
1403 | ||
f206351a | 1404 | if (!dev && !ip_route_output_key(&init_net, &rt, &fl)) { |
1da177e4 LT |
1405 | dev = rt->u.dst.dev; |
1406 | ip_rt_put(rt); | |
1407 | } | |
1408 | if (dev) { | |
1409 | imr->imr_ifindex = dev->ifindex; | |
e5ed6399 | 1410 | idev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
1411 | } |
1412 | return idev; | |
1413 | } | |
1414 | ||
1415 | /* | |
1416 | * Join a socket to a group | |
1417 | */ | |
ab32ea5d BH |
1418 | int sysctl_igmp_max_memberships __read_mostly = IP_MAX_MEMBERSHIPS; |
1419 | int sysctl_igmp_max_msf __read_mostly = IP_MAX_MSF; | |
1da177e4 LT |
1420 | |
1421 | ||
1422 | static int ip_mc_del1_src(struct ip_mc_list *pmc, int sfmode, | |
8f935bbd | 1423 | __be32 *psfsrc) |
1da177e4 LT |
1424 | { |
1425 | struct ip_sf_list *psf, *psf_prev; | |
1426 | int rv = 0; | |
1427 | ||
1428 | psf_prev = NULL; | |
1429 | for (psf=pmc->sources; psf; psf=psf->sf_next) { | |
1430 | if (psf->sf_inaddr == *psfsrc) | |
1431 | break; | |
1432 | psf_prev = psf; | |
1433 | } | |
1434 | if (!psf || psf->sf_count[sfmode] == 0) { | |
1435 | /* source filter not found, or count wrong => bug */ | |
1436 | return -ESRCH; | |
1437 | } | |
1438 | psf->sf_count[sfmode]--; | |
1439 | if (psf->sf_count[sfmode] == 0) { | |
1440 | ip_rt_multicast_event(pmc->interface); | |
1441 | } | |
1442 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { | |
1443 | #ifdef CONFIG_IP_MULTICAST | |
1444 | struct in_device *in_dev = pmc->interface; | |
1445 | #endif | |
1446 | ||
1447 | /* no more filters for this source */ | |
1448 | if (psf_prev) | |
1449 | psf_prev->sf_next = psf->sf_next; | |
1450 | else | |
1451 | pmc->sources = psf->sf_next; | |
1452 | #ifdef CONFIG_IP_MULTICAST | |
1453 | if (psf->sf_oldin && | |
1454 | !IGMP_V1_SEEN(in_dev) && !IGMP_V2_SEEN(in_dev)) { | |
e905a9ed | 1455 | psf->sf_crcount = in_dev->mr_qrv ? in_dev->mr_qrv : |
1da177e4 LT |
1456 | IGMP_Unsolicited_Report_Count; |
1457 | psf->sf_next = pmc->tomb; | |
1458 | pmc->tomb = psf; | |
1459 | rv = 1; | |
1460 | } else | |
1461 | #endif | |
1462 | kfree(psf); | |
1463 | } | |
1464 | return rv; | |
1465 | } | |
1466 | ||
1467 | #ifndef CONFIG_IP_MULTICAST | |
1468 | #define igmp_ifc_event(x) do { } while (0) | |
1469 | #endif | |
1470 | ||
8f935bbd AV |
1471 | static int ip_mc_del_src(struct in_device *in_dev, __be32 *pmca, int sfmode, |
1472 | int sfcount, __be32 *psfsrc, int delta) | |
1da177e4 LT |
1473 | { |
1474 | struct ip_mc_list *pmc; | |
1475 | int changerec = 0; | |
1476 | int i, err; | |
1477 | ||
1478 | if (!in_dev) | |
1479 | return -ENODEV; | |
1480 | read_lock(&in_dev->mc_list_lock); | |
1481 | for (pmc=in_dev->mc_list; pmc; pmc=pmc->next) { | |
1482 | if (*pmca == pmc->multiaddr) | |
1483 | break; | |
1484 | } | |
1485 | if (!pmc) { | |
1486 | /* MCA not found?? bug */ | |
1487 | read_unlock(&in_dev->mc_list_lock); | |
1488 | return -ESRCH; | |
1489 | } | |
1490 | spin_lock_bh(&pmc->lock); | |
1491 | read_unlock(&in_dev->mc_list_lock); | |
1492 | #ifdef CONFIG_IP_MULTICAST | |
1493 | sf_markstate(pmc); | |
1494 | #endif | |
1495 | if (!delta) { | |
1496 | err = -EINVAL; | |
1497 | if (!pmc->sfcount[sfmode]) | |
1498 | goto out_unlock; | |
1499 | pmc->sfcount[sfmode]--; | |
1500 | } | |
1501 | err = 0; | |
1502 | for (i=0; i<sfcount; i++) { | |
1503 | int rv = ip_mc_del1_src(pmc, sfmode, &psfsrc[i]); | |
1504 | ||
1505 | changerec |= rv > 0; | |
1506 | if (!err && rv < 0) | |
1507 | err = rv; | |
1508 | } | |
1509 | if (pmc->sfmode == MCAST_EXCLUDE && | |
1510 | pmc->sfcount[MCAST_EXCLUDE] == 0 && | |
1511 | pmc->sfcount[MCAST_INCLUDE]) { | |
1512 | #ifdef CONFIG_IP_MULTICAST | |
1513 | struct ip_sf_list *psf; | |
1514 | #endif | |
1515 | ||
1516 | /* filter mode change */ | |
1517 | pmc->sfmode = MCAST_INCLUDE; | |
1518 | #ifdef CONFIG_IP_MULTICAST | |
e905a9ed | 1519 | pmc->crcount = in_dev->mr_qrv ? in_dev->mr_qrv : |
1da177e4 LT |
1520 | IGMP_Unsolicited_Report_Count; |
1521 | in_dev->mr_ifc_count = pmc->crcount; | |
1522 | for (psf=pmc->sources; psf; psf = psf->sf_next) | |
1523 | psf->sf_crcount = 0; | |
1524 | igmp_ifc_event(pmc->interface); | |
1525 | } else if (sf_setstate(pmc) || changerec) { | |
1526 | igmp_ifc_event(pmc->interface); | |
1527 | #endif | |
1528 | } | |
1529 | out_unlock: | |
1530 | spin_unlock_bh(&pmc->lock); | |
1531 | return err; | |
1532 | } | |
1533 | ||
1534 | /* | |
1535 | * Add multicast single-source filter to the interface list | |
1536 | */ | |
1537 | static int ip_mc_add1_src(struct ip_mc_list *pmc, int sfmode, | |
8f935bbd | 1538 | __be32 *psfsrc, int delta) |
1da177e4 LT |
1539 | { |
1540 | struct ip_sf_list *psf, *psf_prev; | |
1541 | ||
1542 | psf_prev = NULL; | |
1543 | for (psf=pmc->sources; psf; psf=psf->sf_next) { | |
1544 | if (psf->sf_inaddr == *psfsrc) | |
1545 | break; | |
1546 | psf_prev = psf; | |
1547 | } | |
1548 | if (!psf) { | |
0da974f4 | 1549 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
1da177e4 LT |
1550 | if (!psf) |
1551 | return -ENOBUFS; | |
1da177e4 LT |
1552 | psf->sf_inaddr = *psfsrc; |
1553 | if (psf_prev) { | |
1554 | psf_prev->sf_next = psf; | |
1555 | } else | |
1556 | pmc->sources = psf; | |
1557 | } | |
1558 | psf->sf_count[sfmode]++; | |
1559 | if (psf->sf_count[sfmode] == 1) { | |
1560 | ip_rt_multicast_event(pmc->interface); | |
1561 | } | |
1562 | return 0; | |
1563 | } | |
1564 | ||
1565 | #ifdef CONFIG_IP_MULTICAST | |
1566 | static void sf_markstate(struct ip_mc_list *pmc) | |
1567 | { | |
1568 | struct ip_sf_list *psf; | |
1569 | int mca_xcount = pmc->sfcount[MCAST_EXCLUDE]; | |
1570 | ||
1571 | for (psf=pmc->sources; psf; psf=psf->sf_next) | |
1572 | if (pmc->sfcount[MCAST_EXCLUDE]) { | |
1573 | psf->sf_oldin = mca_xcount == | |
1574 | psf->sf_count[MCAST_EXCLUDE] && | |
1575 | !psf->sf_count[MCAST_INCLUDE]; | |
1576 | } else | |
1577 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; | |
1578 | } | |
1579 | ||
1580 | static int sf_setstate(struct ip_mc_list *pmc) | |
1581 | { | |
ad12583f | 1582 | struct ip_sf_list *psf, *dpsf; |
1da177e4 LT |
1583 | int mca_xcount = pmc->sfcount[MCAST_EXCLUDE]; |
1584 | int qrv = pmc->interface->mr_qrv; | |
1585 | int new_in, rv; | |
1586 | ||
1587 | rv = 0; | |
1588 | for (psf=pmc->sources; psf; psf=psf->sf_next) { | |
1589 | if (pmc->sfcount[MCAST_EXCLUDE]) { | |
1590 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && | |
1591 | !psf->sf_count[MCAST_INCLUDE]; | |
1592 | } else | |
1593 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; | |
ad12583f DS |
1594 | if (new_in) { |
1595 | if (!psf->sf_oldin) { | |
76edc605 | 1596 | struct ip_sf_list *prev = NULL; |
ad12583f DS |
1597 | |
1598 | for (dpsf=pmc->tomb; dpsf; dpsf=dpsf->sf_next) { | |
1599 | if (dpsf->sf_inaddr == psf->sf_inaddr) | |
1600 | break; | |
1601 | prev = dpsf; | |
1602 | } | |
1603 | if (dpsf) { | |
1604 | if (prev) | |
1605 | prev->sf_next = dpsf->sf_next; | |
1606 | else | |
1607 | pmc->tomb = dpsf->sf_next; | |
1608 | kfree(dpsf); | |
1609 | } | |
1610 | psf->sf_crcount = qrv; | |
1611 | rv++; | |
1612 | } | |
1613 | } else if (psf->sf_oldin) { | |
1614 | ||
1615 | psf->sf_crcount = 0; | |
1616 | /* | |
1617 | * add or update "delete" records if an active filter | |
1618 | * is now inactive | |
1619 | */ | |
1620 | for (dpsf=pmc->tomb; dpsf; dpsf=dpsf->sf_next) | |
1621 | if (dpsf->sf_inaddr == psf->sf_inaddr) | |
1622 | break; | |
1623 | if (!dpsf) { | |
1624 | dpsf = (struct ip_sf_list *) | |
1625 | kmalloc(sizeof(*dpsf), GFP_ATOMIC); | |
1626 | if (!dpsf) | |
1627 | continue; | |
1628 | *dpsf = *psf; | |
1629 | /* pmc->lock held by callers */ | |
1630 | dpsf->sf_next = pmc->tomb; | |
1631 | pmc->tomb = dpsf; | |
1632 | } | |
1633 | dpsf->sf_crcount = qrv; | |
1da177e4 LT |
1634 | rv++; |
1635 | } | |
1636 | } | |
1637 | return rv; | |
1638 | } | |
1639 | #endif | |
1640 | ||
1641 | /* | |
1642 | * Add multicast source filter list to the interface list | |
1643 | */ | |
8f935bbd AV |
1644 | static int ip_mc_add_src(struct in_device *in_dev, __be32 *pmca, int sfmode, |
1645 | int sfcount, __be32 *psfsrc, int delta) | |
1da177e4 LT |
1646 | { |
1647 | struct ip_mc_list *pmc; | |
1648 | int isexclude; | |
1649 | int i, err; | |
1650 | ||
1651 | if (!in_dev) | |
1652 | return -ENODEV; | |
1653 | read_lock(&in_dev->mc_list_lock); | |
1654 | for (pmc=in_dev->mc_list; pmc; pmc=pmc->next) { | |
1655 | if (*pmca == pmc->multiaddr) | |
1656 | break; | |
1657 | } | |
1658 | if (!pmc) { | |
1659 | /* MCA not found?? bug */ | |
1660 | read_unlock(&in_dev->mc_list_lock); | |
1661 | return -ESRCH; | |
1662 | } | |
1663 | spin_lock_bh(&pmc->lock); | |
1664 | read_unlock(&in_dev->mc_list_lock); | |
1665 | ||
1666 | #ifdef CONFIG_IP_MULTICAST | |
1667 | sf_markstate(pmc); | |
1668 | #endif | |
1669 | isexclude = pmc->sfmode == MCAST_EXCLUDE; | |
1670 | if (!delta) | |
1671 | pmc->sfcount[sfmode]++; | |
1672 | err = 0; | |
1673 | for (i=0; i<sfcount; i++) { | |
1674 | err = ip_mc_add1_src(pmc, sfmode, &psfsrc[i], delta); | |
1675 | if (err) | |
1676 | break; | |
1677 | } | |
1678 | if (err) { | |
1679 | int j; | |
1680 | ||
1681 | pmc->sfcount[sfmode]--; | |
1682 | for (j=0; j<i; j++) | |
1683 | (void) ip_mc_del1_src(pmc, sfmode, &psfsrc[i]); | |
1684 | } else if (isexclude != (pmc->sfcount[MCAST_EXCLUDE] != 0)) { | |
1685 | #ifdef CONFIG_IP_MULTICAST | |
1da177e4 | 1686 | struct ip_sf_list *psf; |
cfcabdcc | 1687 | in_dev = pmc->interface; |
1da177e4 LT |
1688 | #endif |
1689 | ||
1690 | /* filter mode change */ | |
1691 | if (pmc->sfcount[MCAST_EXCLUDE]) | |
1692 | pmc->sfmode = MCAST_EXCLUDE; | |
1693 | else if (pmc->sfcount[MCAST_INCLUDE]) | |
1694 | pmc->sfmode = MCAST_INCLUDE; | |
1695 | #ifdef CONFIG_IP_MULTICAST | |
1696 | /* else no filters; keep old mode for reports */ | |
1697 | ||
e905a9ed | 1698 | pmc->crcount = in_dev->mr_qrv ? in_dev->mr_qrv : |
1da177e4 LT |
1699 | IGMP_Unsolicited_Report_Count; |
1700 | in_dev->mr_ifc_count = pmc->crcount; | |
1701 | for (psf=pmc->sources; psf; psf = psf->sf_next) | |
1702 | psf->sf_crcount = 0; | |
1703 | igmp_ifc_event(in_dev); | |
1704 | } else if (sf_setstate(pmc)) { | |
1705 | igmp_ifc_event(in_dev); | |
1706 | #endif | |
1707 | } | |
1708 | spin_unlock_bh(&pmc->lock); | |
1709 | return err; | |
1710 | } | |
1711 | ||
1712 | static void ip_mc_clear_src(struct ip_mc_list *pmc) | |
1713 | { | |
1714 | struct ip_sf_list *psf, *nextpsf; | |
1715 | ||
1716 | for (psf=pmc->tomb; psf; psf=nextpsf) { | |
1717 | nextpsf = psf->sf_next; | |
1718 | kfree(psf); | |
1719 | } | |
1720 | pmc->tomb = NULL; | |
1721 | for (psf=pmc->sources; psf; psf=nextpsf) { | |
1722 | nextpsf = psf->sf_next; | |
1723 | kfree(psf); | |
1724 | } | |
1725 | pmc->sources = NULL; | |
1726 | pmc->sfmode = MCAST_EXCLUDE; | |
de9daad9 | 1727 | pmc->sfcount[MCAST_INCLUDE] = 0; |
1da177e4 LT |
1728 | pmc->sfcount[MCAST_EXCLUDE] = 1; |
1729 | } | |
1730 | ||
1731 | ||
1732 | /* | |
1733 | * Join a multicast group | |
1734 | */ | |
1735 | int ip_mc_join_group(struct sock *sk , struct ip_mreqn *imr) | |
1736 | { | |
1737 | int err; | |
8f935bbd | 1738 | __be32 addr = imr->imr_multiaddr.s_addr; |
ca9b907d | 1739 | struct ip_mc_socklist *iml=NULL, *i; |
1da177e4 LT |
1740 | struct in_device *in_dev; |
1741 | struct inet_sock *inet = inet_sk(sk); | |
ca9b907d | 1742 | int ifindex; |
1da177e4 LT |
1743 | int count = 0; |
1744 | ||
f97c1e0c | 1745 | if (!ipv4_is_multicast(addr)) |
1da177e4 LT |
1746 | return -EINVAL; |
1747 | ||
6756ae4b | 1748 | rtnl_lock(); |
1da177e4 LT |
1749 | |
1750 | in_dev = ip_mc_find_dev(imr); | |
1751 | ||
1752 | if (!in_dev) { | |
1753 | iml = NULL; | |
1754 | err = -ENODEV; | |
1755 | goto done; | |
1756 | } | |
1757 | ||
1da177e4 | 1758 | err = -EADDRINUSE; |
ca9b907d | 1759 | ifindex = imr->imr_ifindex; |
1da177e4 | 1760 | for (i = inet->mc_list; i; i = i->next) { |
ca9b907d DS |
1761 | if (i->multi.imr_multiaddr.s_addr == addr && |
1762 | i->multi.imr_ifindex == ifindex) | |
1da177e4 | 1763 | goto done; |
1da177e4 LT |
1764 | count++; |
1765 | } | |
1766 | err = -ENOBUFS; | |
ca9b907d DS |
1767 | if (count >= sysctl_igmp_max_memberships) |
1768 | goto done; | |
8b3a7005 | 1769 | iml = sock_kmalloc(sk,sizeof(*iml),GFP_KERNEL); |
ca9b907d | 1770 | if (iml == NULL) |
1da177e4 | 1771 | goto done; |
ca9b907d | 1772 | |
1da177e4 LT |
1773 | memcpy(&iml->multi, imr, sizeof(*imr)); |
1774 | iml->next = inet->mc_list; | |
1da177e4 LT |
1775 | iml->sflist = NULL; |
1776 | iml->sfmode = MCAST_EXCLUDE; | |
1777 | inet->mc_list = iml; | |
1778 | ip_mc_inc_group(in_dev, addr); | |
1da177e4 | 1779 | err = 0; |
1da177e4 | 1780 | done: |
6756ae4b | 1781 | rtnl_unlock(); |
1da177e4 LT |
1782 | return err; |
1783 | } | |
1784 | ||
1785 | static int ip_mc_leave_src(struct sock *sk, struct ip_mc_socklist *iml, | |
1786 | struct in_device *in_dev) | |
1787 | { | |
1788 | int err; | |
1789 | ||
cfcabdcc | 1790 | if (iml->sflist == NULL) { |
1da177e4 LT |
1791 | /* any-source empty exclude case */ |
1792 | return ip_mc_del_src(in_dev, &iml->multi.imr_multiaddr.s_addr, | |
1793 | iml->sfmode, 0, NULL, 0); | |
1794 | } | |
1795 | err = ip_mc_del_src(in_dev, &iml->multi.imr_multiaddr.s_addr, | |
1796 | iml->sfmode, iml->sflist->sl_count, | |
1797 | iml->sflist->sl_addr, 0); | |
1798 | sock_kfree_s(sk, iml->sflist, IP_SFLSIZE(iml->sflist->sl_max)); | |
1799 | iml->sflist = NULL; | |
1800 | return err; | |
1801 | } | |
1802 | ||
1803 | /* | |
1804 | * Ask a socket to leave a group. | |
1805 | */ | |
1806 | ||
1807 | int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr) | |
1808 | { | |
1809 | struct inet_sock *inet = inet_sk(sk); | |
1810 | struct ip_mc_socklist *iml, **imlp; | |
84b42bae | 1811 | struct in_device *in_dev; |
8f935bbd | 1812 | __be32 group = imr->imr_multiaddr.s_addr; |
84b42bae | 1813 | u32 ifindex; |
acd6e00b | 1814 | int ret = -EADDRNOTAVAIL; |
1da177e4 LT |
1815 | |
1816 | rtnl_lock(); | |
84b42bae | 1817 | in_dev = ip_mc_find_dev(imr); |
84b42bae | 1818 | ifindex = imr->imr_ifindex; |
1da177e4 | 1819 | for (imlp = &inet->mc_list; (iml = *imlp) != NULL; imlp = &iml->next) { |
acd6e00b DS |
1820 | if (iml->multi.imr_multiaddr.s_addr != group) |
1821 | continue; | |
1822 | if (ifindex) { | |
1823 | if (iml->multi.imr_ifindex != ifindex) | |
1824 | continue; | |
1825 | } else if (imr->imr_address.s_addr && imr->imr_address.s_addr != | |
1826 | iml->multi.imr_address.s_addr) | |
1827 | continue; | |
1da177e4 | 1828 | |
acd6e00b | 1829 | (void) ip_mc_leave_src(sk, iml, in_dev); |
1da177e4 | 1830 | |
acd6e00b DS |
1831 | *imlp = iml->next; |
1832 | ||
1833 | if (in_dev) | |
84b42bae | 1834 | ip_mc_dec_group(in_dev, group); |
acd6e00b DS |
1835 | rtnl_unlock(); |
1836 | sock_kfree_s(sk, iml, sizeof(*iml)); | |
1837 | return 0; | |
1da177e4 | 1838 | } |
acd6e00b DS |
1839 | if (!in_dev) |
1840 | ret = -ENODEV; | |
1da177e4 | 1841 | rtnl_unlock(); |
acd6e00b | 1842 | return ret; |
1da177e4 LT |
1843 | } |
1844 | ||
1845 | int ip_mc_source(int add, int omode, struct sock *sk, struct | |
1846 | ip_mreq_source *mreqs, int ifindex) | |
1847 | { | |
1848 | int err; | |
1849 | struct ip_mreqn imr; | |
63007727 | 1850 | __be32 addr = mreqs->imr_multiaddr; |
1da177e4 LT |
1851 | struct ip_mc_socklist *pmc; |
1852 | struct in_device *in_dev = NULL; | |
1853 | struct inet_sock *inet = inet_sk(sk); | |
1854 | struct ip_sf_socklist *psl; | |
8cdaaa15 | 1855 | int leavegroup = 0; |
1da177e4 LT |
1856 | int i, j, rv; |
1857 | ||
f97c1e0c | 1858 | if (!ipv4_is_multicast(addr)) |
1da177e4 LT |
1859 | return -EINVAL; |
1860 | ||
6756ae4b | 1861 | rtnl_lock(); |
1da177e4 LT |
1862 | |
1863 | imr.imr_multiaddr.s_addr = mreqs->imr_multiaddr; | |
1864 | imr.imr_address.s_addr = mreqs->imr_interface; | |
1865 | imr.imr_ifindex = ifindex; | |
1866 | in_dev = ip_mc_find_dev(&imr); | |
1867 | ||
1868 | if (!in_dev) { | |
1869 | err = -ENODEV; | |
1870 | goto done; | |
1871 | } | |
1872 | err = -EADDRNOTAVAIL; | |
1873 | ||
1874 | for (pmc=inet->mc_list; pmc; pmc=pmc->next) { | |
ca9b907d DS |
1875 | if (pmc->multi.imr_multiaddr.s_addr == imr.imr_multiaddr.s_addr |
1876 | && pmc->multi.imr_ifindex == imr.imr_ifindex) | |
1da177e4 LT |
1877 | break; |
1878 | } | |
917f2f10 DS |
1879 | if (!pmc) { /* must have a prior join */ |
1880 | err = -EINVAL; | |
1da177e4 | 1881 | goto done; |
917f2f10 | 1882 | } |
1da177e4 LT |
1883 | /* if a source filter was set, must be the same mode as before */ |
1884 | if (pmc->sflist) { | |
917f2f10 DS |
1885 | if (pmc->sfmode != omode) { |
1886 | err = -EINVAL; | |
1da177e4 | 1887 | goto done; |
917f2f10 | 1888 | } |
1da177e4 LT |
1889 | } else if (pmc->sfmode != omode) { |
1890 | /* allow mode switches for empty-set filters */ | |
1891 | ip_mc_add_src(in_dev, &mreqs->imr_multiaddr, omode, 0, NULL, 0); | |
e905a9ed | 1892 | ip_mc_del_src(in_dev, &mreqs->imr_multiaddr, pmc->sfmode, 0, |
1da177e4 LT |
1893 | NULL, 0); |
1894 | pmc->sfmode = omode; | |
1895 | } | |
1896 | ||
1897 | psl = pmc->sflist; | |
1898 | if (!add) { | |
1899 | if (!psl) | |
917f2f10 | 1900 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 LT |
1901 | rv = !0; |
1902 | for (i=0; i<psl->sl_count; i++) { | |
1903 | rv = memcmp(&psl->sl_addr[i], &mreqs->imr_sourceaddr, | |
63007727 | 1904 | sizeof(__be32)); |
1da177e4 LT |
1905 | if (rv == 0) |
1906 | break; | |
1907 | } | |
1908 | if (rv) /* source not found */ | |
917f2f10 | 1909 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 1910 | |
8cdaaa15 DS |
1911 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
1912 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { | |
1913 | leavegroup = 1; | |
1914 | goto done; | |
1915 | } | |
1916 | ||
1da177e4 | 1917 | /* update the interface filter */ |
e905a9ed | 1918 | ip_mc_del_src(in_dev, &mreqs->imr_multiaddr, omode, 1, |
1da177e4 LT |
1919 | &mreqs->imr_sourceaddr, 1); |
1920 | ||
1921 | for (j=i+1; j<psl->sl_count; j++) | |
1922 | psl->sl_addr[j-1] = psl->sl_addr[j]; | |
1923 | psl->sl_count--; | |
1924 | err = 0; | |
1925 | goto done; | |
1926 | } | |
1927 | /* else, add a new source to the filter */ | |
1928 | ||
1929 | if (psl && psl->sl_count >= sysctl_igmp_max_msf) { | |
1930 | err = -ENOBUFS; | |
1931 | goto done; | |
1932 | } | |
1933 | if (!psl || psl->sl_count == psl->sl_max) { | |
1934 | struct ip_sf_socklist *newpsl; | |
1935 | int count = IP_SFBLOCK; | |
1936 | ||
1937 | if (psl) | |
1938 | count += psl->sl_max; | |
8b3a7005 | 1939 | newpsl = sock_kmalloc(sk, IP_SFLSIZE(count), GFP_KERNEL); |
1da177e4 LT |
1940 | if (!newpsl) { |
1941 | err = -ENOBUFS; | |
1942 | goto done; | |
1943 | } | |
1944 | newpsl->sl_max = count; | |
1945 | newpsl->sl_count = count - IP_SFBLOCK; | |
1946 | if (psl) { | |
1947 | for (i=0; i<psl->sl_count; i++) | |
1948 | newpsl->sl_addr[i] = psl->sl_addr[i]; | |
1949 | sock_kfree_s(sk, psl, IP_SFLSIZE(psl->sl_max)); | |
1950 | } | |
1951 | pmc->sflist = psl = newpsl; | |
1952 | } | |
1953 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ | |
1954 | for (i=0; i<psl->sl_count; i++) { | |
1955 | rv = memcmp(&psl->sl_addr[i], &mreqs->imr_sourceaddr, | |
63007727 | 1956 | sizeof(__be32)); |
1da177e4 LT |
1957 | if (rv == 0) |
1958 | break; | |
1959 | } | |
1960 | if (rv == 0) /* address already there is an error */ | |
1961 | goto done; | |
1962 | for (j=psl->sl_count-1; j>=i; j--) | |
1963 | psl->sl_addr[j+1] = psl->sl_addr[j]; | |
1964 | psl->sl_addr[i] = mreqs->imr_sourceaddr; | |
1965 | psl->sl_count++; | |
1966 | err = 0; | |
1967 | /* update the interface list */ | |
e905a9ed | 1968 | ip_mc_add_src(in_dev, &mreqs->imr_multiaddr, omode, 1, |
1da177e4 LT |
1969 | &mreqs->imr_sourceaddr, 1); |
1970 | done: | |
6756ae4b | 1971 | rtnl_unlock(); |
8cdaaa15 DS |
1972 | if (leavegroup) |
1973 | return ip_mc_leave_group(sk, &imr); | |
1da177e4 LT |
1974 | return err; |
1975 | } | |
1976 | ||
1977 | int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf, int ifindex) | |
1978 | { | |
9951f036 | 1979 | int err = 0; |
1da177e4 | 1980 | struct ip_mreqn imr; |
63007727 | 1981 | __be32 addr = msf->imsf_multiaddr; |
1da177e4 LT |
1982 | struct ip_mc_socklist *pmc; |
1983 | struct in_device *in_dev; | |
1984 | struct inet_sock *inet = inet_sk(sk); | |
1985 | struct ip_sf_socklist *newpsl, *psl; | |
9951f036 | 1986 | int leavegroup = 0; |
1da177e4 | 1987 | |
f97c1e0c | 1988 | if (!ipv4_is_multicast(addr)) |
1da177e4 LT |
1989 | return -EINVAL; |
1990 | if (msf->imsf_fmode != MCAST_INCLUDE && | |
1991 | msf->imsf_fmode != MCAST_EXCLUDE) | |
1992 | return -EINVAL; | |
1993 | ||
6756ae4b | 1994 | rtnl_lock(); |
1da177e4 LT |
1995 | |
1996 | imr.imr_multiaddr.s_addr = msf->imsf_multiaddr; | |
1997 | imr.imr_address.s_addr = msf->imsf_interface; | |
1998 | imr.imr_ifindex = ifindex; | |
1999 | in_dev = ip_mc_find_dev(&imr); | |
2000 | ||
2001 | if (!in_dev) { | |
2002 | err = -ENODEV; | |
2003 | goto done; | |
2004 | } | |
1da177e4 | 2005 | |
9951f036 DS |
2006 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
2007 | if (msf->imsf_fmode == MCAST_INCLUDE && msf->imsf_numsrc == 0) { | |
2008 | leavegroup = 1; | |
2009 | goto done; | |
2010 | } | |
2011 | ||
1da177e4 LT |
2012 | for (pmc=inet->mc_list; pmc; pmc=pmc->next) { |
2013 | if (pmc->multi.imr_multiaddr.s_addr == msf->imsf_multiaddr && | |
2014 | pmc->multi.imr_ifindex == imr.imr_ifindex) | |
2015 | break; | |
2016 | } | |
917f2f10 DS |
2017 | if (!pmc) { /* must have a prior join */ |
2018 | err = -EINVAL; | |
1da177e4 | 2019 | goto done; |
917f2f10 | 2020 | } |
1da177e4 | 2021 | if (msf->imsf_numsrc) { |
8b3a7005 KK |
2022 | newpsl = sock_kmalloc(sk, IP_SFLSIZE(msf->imsf_numsrc), |
2023 | GFP_KERNEL); | |
1da177e4 LT |
2024 | if (!newpsl) { |
2025 | err = -ENOBUFS; | |
2026 | goto done; | |
2027 | } | |
2028 | newpsl->sl_max = newpsl->sl_count = msf->imsf_numsrc; | |
2029 | memcpy(newpsl->sl_addr, msf->imsf_slist, | |
2030 | msf->imsf_numsrc * sizeof(msf->imsf_slist[0])); | |
2031 | err = ip_mc_add_src(in_dev, &msf->imsf_multiaddr, | |
2032 | msf->imsf_fmode, newpsl->sl_count, newpsl->sl_addr, 0); | |
2033 | if (err) { | |
2034 | sock_kfree_s(sk, newpsl, IP_SFLSIZE(newpsl->sl_max)); | |
2035 | goto done; | |
2036 | } | |
8713dbf0 | 2037 | } else { |
1da177e4 | 2038 | newpsl = NULL; |
8713dbf0 YZ |
2039 | (void) ip_mc_add_src(in_dev, &msf->imsf_multiaddr, |
2040 | msf->imsf_fmode, 0, NULL, 0); | |
2041 | } | |
1da177e4 LT |
2042 | psl = pmc->sflist; |
2043 | if (psl) { | |
2044 | (void) ip_mc_del_src(in_dev, &msf->imsf_multiaddr, pmc->sfmode, | |
2045 | psl->sl_count, psl->sl_addr, 0); | |
2046 | sock_kfree_s(sk, psl, IP_SFLSIZE(psl->sl_max)); | |
2047 | } else | |
2048 | (void) ip_mc_del_src(in_dev, &msf->imsf_multiaddr, pmc->sfmode, | |
2049 | 0, NULL, 0); | |
2050 | pmc->sflist = newpsl; | |
2051 | pmc->sfmode = msf->imsf_fmode; | |
917f2f10 | 2052 | err = 0; |
1da177e4 | 2053 | done: |
6756ae4b | 2054 | rtnl_unlock(); |
9951f036 DS |
2055 | if (leavegroup) |
2056 | err = ip_mc_leave_group(sk, &imr); | |
1da177e4 LT |
2057 | return err; |
2058 | } | |
2059 | ||
2060 | int ip_mc_msfget(struct sock *sk, struct ip_msfilter *msf, | |
2061 | struct ip_msfilter __user *optval, int __user *optlen) | |
2062 | { | |
2063 | int err, len, count, copycount; | |
2064 | struct ip_mreqn imr; | |
63007727 | 2065 | __be32 addr = msf->imsf_multiaddr; |
1da177e4 LT |
2066 | struct ip_mc_socklist *pmc; |
2067 | struct in_device *in_dev; | |
2068 | struct inet_sock *inet = inet_sk(sk); | |
2069 | struct ip_sf_socklist *psl; | |
2070 | ||
f97c1e0c | 2071 | if (!ipv4_is_multicast(addr)) |
1da177e4 LT |
2072 | return -EINVAL; |
2073 | ||
6756ae4b | 2074 | rtnl_lock(); |
1da177e4 LT |
2075 | |
2076 | imr.imr_multiaddr.s_addr = msf->imsf_multiaddr; | |
2077 | imr.imr_address.s_addr = msf->imsf_interface; | |
2078 | imr.imr_ifindex = 0; | |
2079 | in_dev = ip_mc_find_dev(&imr); | |
2080 | ||
2081 | if (!in_dev) { | |
2082 | err = -ENODEV; | |
2083 | goto done; | |
2084 | } | |
2085 | err = -EADDRNOTAVAIL; | |
2086 | ||
2087 | for (pmc=inet->mc_list; pmc; pmc=pmc->next) { | |
2088 | if (pmc->multi.imr_multiaddr.s_addr == msf->imsf_multiaddr && | |
2089 | pmc->multi.imr_ifindex == imr.imr_ifindex) | |
2090 | break; | |
2091 | } | |
2092 | if (!pmc) /* must have a prior join */ | |
2093 | goto done; | |
2094 | msf->imsf_fmode = pmc->sfmode; | |
2095 | psl = pmc->sflist; | |
6756ae4b | 2096 | rtnl_unlock(); |
1da177e4 LT |
2097 | if (!psl) { |
2098 | len = 0; | |
2099 | count = 0; | |
2100 | } else { | |
2101 | count = psl->sl_count; | |
2102 | } | |
2103 | copycount = count < msf->imsf_numsrc ? count : msf->imsf_numsrc; | |
2104 | len = copycount * sizeof(psl->sl_addr[0]); | |
2105 | msf->imsf_numsrc = count; | |
2106 | if (put_user(IP_MSFILTER_SIZE(copycount), optlen) || | |
2107 | copy_to_user(optval, msf, IP_MSFILTER_SIZE(0))) { | |
2108 | return -EFAULT; | |
2109 | } | |
2110 | if (len && | |
2111 | copy_to_user(&optval->imsf_slist[0], psl->sl_addr, len)) | |
2112 | return -EFAULT; | |
2113 | return 0; | |
2114 | done: | |
6756ae4b | 2115 | rtnl_unlock(); |
1da177e4 LT |
2116 | return err; |
2117 | } | |
2118 | ||
2119 | int ip_mc_gsfget(struct sock *sk, struct group_filter *gsf, | |
2120 | struct group_filter __user *optval, int __user *optlen) | |
2121 | { | |
2122 | int err, i, count, copycount; | |
2123 | struct sockaddr_in *psin; | |
63007727 | 2124 | __be32 addr; |
1da177e4 LT |
2125 | struct ip_mc_socklist *pmc; |
2126 | struct inet_sock *inet = inet_sk(sk); | |
2127 | struct ip_sf_socklist *psl; | |
2128 | ||
2129 | psin = (struct sockaddr_in *)&gsf->gf_group; | |
2130 | if (psin->sin_family != AF_INET) | |
2131 | return -EINVAL; | |
2132 | addr = psin->sin_addr.s_addr; | |
f97c1e0c | 2133 | if (!ipv4_is_multicast(addr)) |
1da177e4 LT |
2134 | return -EINVAL; |
2135 | ||
6756ae4b | 2136 | rtnl_lock(); |
1da177e4 LT |
2137 | |
2138 | err = -EADDRNOTAVAIL; | |
2139 | ||
2140 | for (pmc=inet->mc_list; pmc; pmc=pmc->next) { | |
2141 | if (pmc->multi.imr_multiaddr.s_addr == addr && | |
2142 | pmc->multi.imr_ifindex == gsf->gf_interface) | |
2143 | break; | |
2144 | } | |
2145 | if (!pmc) /* must have a prior join */ | |
2146 | goto done; | |
2147 | gsf->gf_fmode = pmc->sfmode; | |
2148 | psl = pmc->sflist; | |
6756ae4b | 2149 | rtnl_unlock(); |
1da177e4 LT |
2150 | count = psl ? psl->sl_count : 0; |
2151 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; | |
2152 | gsf->gf_numsrc = count; | |
2153 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || | |
2154 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { | |
2155 | return -EFAULT; | |
2156 | } | |
2157 | for (i=0; i<copycount; i++) { | |
1da177e4 LT |
2158 | struct sockaddr_storage ss; |
2159 | ||
2160 | psin = (struct sockaddr_in *)&ss; | |
2161 | memset(&ss, 0, sizeof(ss)); | |
2162 | psin->sin_family = AF_INET; | |
2163 | psin->sin_addr.s_addr = psl->sl_addr[i]; | |
2164 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) | |
2165 | return -EFAULT; | |
2166 | } | |
2167 | return 0; | |
2168 | done: | |
6756ae4b | 2169 | rtnl_unlock(); |
1da177e4 LT |
2170 | return err; |
2171 | } | |
2172 | ||
2173 | /* | |
2174 | * check if a multicast source filter allows delivery for a given <src,dst,intf> | |
2175 | */ | |
c0cda068 | 2176 | int ip_mc_sf_allow(struct sock *sk, __be32 loc_addr, __be32 rmt_addr, int dif) |
1da177e4 LT |
2177 | { |
2178 | struct inet_sock *inet = inet_sk(sk); | |
2179 | struct ip_mc_socklist *pmc; | |
2180 | struct ip_sf_socklist *psl; | |
2181 | int i; | |
2182 | ||
f97c1e0c | 2183 | if (!ipv4_is_multicast(loc_addr)) |
1da177e4 LT |
2184 | return 1; |
2185 | ||
2186 | for (pmc=inet->mc_list; pmc; pmc=pmc->next) { | |
2187 | if (pmc->multi.imr_multiaddr.s_addr == loc_addr && | |
2188 | pmc->multi.imr_ifindex == dif) | |
2189 | break; | |
2190 | } | |
2191 | if (!pmc) | |
2192 | return 1; | |
2193 | psl = pmc->sflist; | |
2194 | if (!psl) | |
2195 | return pmc->sfmode == MCAST_EXCLUDE; | |
2196 | ||
2197 | for (i=0; i<psl->sl_count; i++) { | |
2198 | if (psl->sl_addr[i] == rmt_addr) | |
2199 | break; | |
2200 | } | |
2201 | if (pmc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) | |
2202 | return 0; | |
2203 | if (pmc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) | |
2204 | return 0; | |
2205 | return 1; | |
2206 | } | |
2207 | ||
2208 | /* | |
2209 | * A socket is closing. | |
2210 | */ | |
2211 | ||
2212 | void ip_mc_drop_socket(struct sock *sk) | |
2213 | { | |
2214 | struct inet_sock *inet = inet_sk(sk); | |
2215 | struct ip_mc_socklist *iml; | |
2216 | ||
2217 | if (inet->mc_list == NULL) | |
2218 | return; | |
2219 | ||
2220 | rtnl_lock(); | |
2221 | while ((iml = inet->mc_list) != NULL) { | |
2222 | struct in_device *in_dev; | |
2223 | inet->mc_list = iml->next; | |
2224 | ||
7fee0ca2 | 2225 | in_dev = inetdev_by_index(&init_net, iml->multi.imr_ifindex); |
bb699cbc MR |
2226 | (void) ip_mc_leave_src(sk, iml, in_dev); |
2227 | if (in_dev != NULL) { | |
1da177e4 LT |
2228 | ip_mc_dec_group(in_dev, iml->multi.imr_multiaddr.s_addr); |
2229 | in_dev_put(in_dev); | |
2230 | } | |
2231 | sock_kfree_s(sk, iml, sizeof(*iml)); | |
1da177e4 LT |
2232 | } |
2233 | rtnl_unlock(); | |
2234 | } | |
2235 | ||
a60c4923 | 2236 | int ip_check_mc(struct in_device *in_dev, __be32 mc_addr, __be32 src_addr, u16 proto) |
1da177e4 LT |
2237 | { |
2238 | struct ip_mc_list *im; | |
2239 | struct ip_sf_list *psf; | |
2240 | int rv = 0; | |
2241 | ||
2242 | read_lock(&in_dev->mc_list_lock); | |
2243 | for (im=in_dev->mc_list; im; im=im->next) { | |
2244 | if (im->multiaddr == mc_addr) | |
2245 | break; | |
2246 | } | |
2247 | if (im && proto == IPPROTO_IGMP) { | |
2248 | rv = 1; | |
2249 | } else if (im) { | |
2250 | if (src_addr) { | |
2251 | for (psf=im->sources; psf; psf=psf->sf_next) { | |
2252 | if (psf->sf_inaddr == src_addr) | |
2253 | break; | |
2254 | } | |
2255 | if (psf) | |
2256 | rv = psf->sf_count[MCAST_INCLUDE] || | |
2257 | psf->sf_count[MCAST_EXCLUDE] != | |
2258 | im->sfcount[MCAST_EXCLUDE]; | |
2259 | else | |
2260 | rv = im->sfcount[MCAST_EXCLUDE] != 0; | |
2261 | } else | |
2262 | rv = 1; /* unspecified source; tentatively allow */ | |
2263 | } | |
2264 | read_unlock(&in_dev->mc_list_lock); | |
2265 | return rv; | |
2266 | } | |
2267 | ||
2268 | #if defined(CONFIG_PROC_FS) | |
2269 | struct igmp_mc_iter_state { | |
2270 | struct net_device *dev; | |
2271 | struct in_device *in_dev; | |
2272 | }; | |
2273 | ||
2274 | #define igmp_mc_seq_private(seq) ((struct igmp_mc_iter_state *)(seq)->private) | |
2275 | ||
2276 | static inline struct ip_mc_list *igmp_mc_get_first(struct seq_file *seq) | |
2277 | { | |
2278 | struct ip_mc_list *im = NULL; | |
2279 | struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq); | |
2280 | ||
7562f876 | 2281 | state->in_dev = NULL; |
881d966b | 2282 | for_each_netdev(&init_net, state->dev) { |
1da177e4 LT |
2283 | struct in_device *in_dev; |
2284 | in_dev = in_dev_get(state->dev); | |
2285 | if (!in_dev) | |
2286 | continue; | |
2287 | read_lock(&in_dev->mc_list_lock); | |
2288 | im = in_dev->mc_list; | |
2289 | if (im) { | |
2290 | state->in_dev = in_dev; | |
2291 | break; | |
2292 | } | |
2293 | read_unlock(&in_dev->mc_list_lock); | |
2294 | in_dev_put(in_dev); | |
2295 | } | |
2296 | return im; | |
2297 | } | |
2298 | ||
2299 | static struct ip_mc_list *igmp_mc_get_next(struct seq_file *seq, struct ip_mc_list *im) | |
2300 | { | |
2301 | struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq); | |
2302 | im = im->next; | |
2303 | while (!im) { | |
2304 | if (likely(state->in_dev != NULL)) { | |
2305 | read_unlock(&state->in_dev->mc_list_lock); | |
2306 | in_dev_put(state->in_dev); | |
2307 | } | |
7562f876 | 2308 | state->dev = next_net_device(state->dev); |
1da177e4 LT |
2309 | if (!state->dev) { |
2310 | state->in_dev = NULL; | |
2311 | break; | |
2312 | } | |
2313 | state->in_dev = in_dev_get(state->dev); | |
2314 | if (!state->in_dev) | |
2315 | continue; | |
2316 | read_lock(&state->in_dev->mc_list_lock); | |
2317 | im = state->in_dev->mc_list; | |
2318 | } | |
2319 | return im; | |
2320 | } | |
2321 | ||
2322 | static struct ip_mc_list *igmp_mc_get_idx(struct seq_file *seq, loff_t pos) | |
2323 | { | |
2324 | struct ip_mc_list *im = igmp_mc_get_first(seq); | |
2325 | if (im) | |
2326 | while (pos && (im = igmp_mc_get_next(seq, im)) != NULL) | |
2327 | --pos; | |
2328 | return pos ? NULL : im; | |
2329 | } | |
2330 | ||
2331 | static void *igmp_mc_seq_start(struct seq_file *seq, loff_t *pos) | |
dd329bfa | 2332 | __acquires(dev_base_lock) |
1da177e4 LT |
2333 | { |
2334 | read_lock(&dev_base_lock); | |
2335 | return *pos ? igmp_mc_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
2336 | } | |
2337 | ||
2338 | static void *igmp_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2339 | { | |
2340 | struct ip_mc_list *im; | |
2341 | if (v == SEQ_START_TOKEN) | |
2342 | im = igmp_mc_get_first(seq); | |
2343 | else | |
2344 | im = igmp_mc_get_next(seq, v); | |
2345 | ++*pos; | |
2346 | return im; | |
2347 | } | |
2348 | ||
2349 | static void igmp_mc_seq_stop(struct seq_file *seq, void *v) | |
dd329bfa | 2350 | __releases(dev_base_lock) |
1da177e4 LT |
2351 | { |
2352 | struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq); | |
2353 | if (likely(state->in_dev != NULL)) { | |
2354 | read_unlock(&state->in_dev->mc_list_lock); | |
2355 | in_dev_put(state->in_dev); | |
2356 | state->in_dev = NULL; | |
2357 | } | |
2358 | state->dev = NULL; | |
2359 | read_unlock(&dev_base_lock); | |
2360 | } | |
2361 | ||
2362 | static int igmp_mc_seq_show(struct seq_file *seq, void *v) | |
2363 | { | |
2364 | if (v == SEQ_START_TOKEN) | |
e905a9ed | 2365 | seq_puts(seq, |
1da177e4 LT |
2366 | "Idx\tDevice : Count Querier\tGroup Users Timer\tReporter\n"); |
2367 | else { | |
2368 | struct ip_mc_list *im = (struct ip_mc_list *)v; | |
2369 | struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq); | |
2370 | char *querier; | |
2371 | #ifdef CONFIG_IP_MULTICAST | |
2372 | querier = IGMP_V1_SEEN(state->in_dev) ? "V1" : | |
2373 | IGMP_V2_SEEN(state->in_dev) ? "V2" : | |
2374 | "V3"; | |
2375 | #else | |
2376 | querier = "NONE"; | |
2377 | #endif | |
2378 | ||
2379 | if (state->in_dev->mc_list == im) { | |
2380 | seq_printf(seq, "%d\t%-10s: %5d %7s\n", | |
2381 | state->dev->ifindex, state->dev->name, state->dev->mc_count, querier); | |
2382 | } | |
2383 | ||
2384 | seq_printf(seq, | |
338fcf98 | 2385 | "\t\t\t\t%08X %5d %d:%08lX\t\t%d\n", |
1da177e4 LT |
2386 | im->multiaddr, im->users, |
2387 | im->tm_running, im->tm_running ? | |
2388 | jiffies_to_clock_t(im->timer.expires-jiffies) : 0, | |
2389 | im->reporter); | |
2390 | } | |
2391 | return 0; | |
2392 | } | |
2393 | ||
f690808e | 2394 | static const struct seq_operations igmp_mc_seq_ops = { |
1da177e4 LT |
2395 | .start = igmp_mc_seq_start, |
2396 | .next = igmp_mc_seq_next, | |
2397 | .stop = igmp_mc_seq_stop, | |
2398 | .show = igmp_mc_seq_show, | |
2399 | }; | |
2400 | ||
2401 | static int igmp_mc_seq_open(struct inode *inode, struct file *file) | |
2402 | { | |
cf7732e4 PE |
2403 | return seq_open_private(file, &igmp_mc_seq_ops, |
2404 | sizeof(struct igmp_mc_iter_state)); | |
1da177e4 LT |
2405 | } |
2406 | ||
9a32144e | 2407 | static const struct file_operations igmp_mc_seq_fops = { |
1da177e4 LT |
2408 | .owner = THIS_MODULE, |
2409 | .open = igmp_mc_seq_open, | |
2410 | .read = seq_read, | |
2411 | .llseek = seq_lseek, | |
2412 | .release = seq_release_private, | |
2413 | }; | |
2414 | ||
2415 | struct igmp_mcf_iter_state { | |
2416 | struct net_device *dev; | |
2417 | struct in_device *idev; | |
2418 | struct ip_mc_list *im; | |
2419 | }; | |
2420 | ||
2421 | #define igmp_mcf_seq_private(seq) ((struct igmp_mcf_iter_state *)(seq)->private) | |
2422 | ||
2423 | static inline struct ip_sf_list *igmp_mcf_get_first(struct seq_file *seq) | |
2424 | { | |
2425 | struct ip_sf_list *psf = NULL; | |
2426 | struct ip_mc_list *im = NULL; | |
2427 | struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq); | |
2428 | ||
7562f876 PE |
2429 | state->idev = NULL; |
2430 | state->im = NULL; | |
881d966b | 2431 | for_each_netdev(&init_net, state->dev) { |
1da177e4 LT |
2432 | struct in_device *idev; |
2433 | idev = in_dev_get(state->dev); | |
2434 | if (unlikely(idev == NULL)) | |
2435 | continue; | |
2436 | read_lock(&idev->mc_list_lock); | |
2437 | im = idev->mc_list; | |
2438 | if (likely(im != NULL)) { | |
2439 | spin_lock_bh(&im->lock); | |
2440 | psf = im->sources; | |
2441 | if (likely(psf != NULL)) { | |
2442 | state->im = im; | |
2443 | state->idev = idev; | |
2444 | break; | |
2445 | } | |
2446 | spin_unlock_bh(&im->lock); | |
2447 | } | |
2448 | read_unlock(&idev->mc_list_lock); | |
2449 | in_dev_put(idev); | |
2450 | } | |
2451 | return psf; | |
2452 | } | |
2453 | ||
2454 | static struct ip_sf_list *igmp_mcf_get_next(struct seq_file *seq, struct ip_sf_list *psf) | |
2455 | { | |
2456 | struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq); | |
2457 | ||
2458 | psf = psf->sf_next; | |
2459 | while (!psf) { | |
2460 | spin_unlock_bh(&state->im->lock); | |
2461 | state->im = state->im->next; | |
2462 | while (!state->im) { | |
2463 | if (likely(state->idev != NULL)) { | |
2464 | read_unlock(&state->idev->mc_list_lock); | |
2465 | in_dev_put(state->idev); | |
2466 | } | |
7562f876 | 2467 | state->dev = next_net_device(state->dev); |
1da177e4 LT |
2468 | if (!state->dev) { |
2469 | state->idev = NULL; | |
2470 | goto out; | |
2471 | } | |
2472 | state->idev = in_dev_get(state->dev); | |
2473 | if (!state->idev) | |
2474 | continue; | |
2475 | read_lock(&state->idev->mc_list_lock); | |
2476 | state->im = state->idev->mc_list; | |
2477 | } | |
2478 | if (!state->im) | |
2479 | break; | |
2480 | spin_lock_bh(&state->im->lock); | |
2481 | psf = state->im->sources; | |
2482 | } | |
2483 | out: | |
2484 | return psf; | |
2485 | } | |
2486 | ||
2487 | static struct ip_sf_list *igmp_mcf_get_idx(struct seq_file *seq, loff_t pos) | |
2488 | { | |
2489 | struct ip_sf_list *psf = igmp_mcf_get_first(seq); | |
2490 | if (psf) | |
2491 | while (pos && (psf = igmp_mcf_get_next(seq, psf)) != NULL) | |
2492 | --pos; | |
2493 | return pos ? NULL : psf; | |
2494 | } | |
2495 | ||
2496 | static void *igmp_mcf_seq_start(struct seq_file *seq, loff_t *pos) | |
2497 | { | |
2498 | read_lock(&dev_base_lock); | |
2499 | return *pos ? igmp_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
2500 | } | |
2501 | ||
2502 | static void *igmp_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2503 | { | |
2504 | struct ip_sf_list *psf; | |
2505 | if (v == SEQ_START_TOKEN) | |
2506 | psf = igmp_mcf_get_first(seq); | |
2507 | else | |
2508 | psf = igmp_mcf_get_next(seq, v); | |
2509 | ++*pos; | |
2510 | return psf; | |
2511 | } | |
2512 | ||
2513 | static void igmp_mcf_seq_stop(struct seq_file *seq, void *v) | |
2514 | { | |
2515 | struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq); | |
2516 | if (likely(state->im != NULL)) { | |
2517 | spin_unlock_bh(&state->im->lock); | |
2518 | state->im = NULL; | |
2519 | } | |
2520 | if (likely(state->idev != NULL)) { | |
2521 | read_unlock(&state->idev->mc_list_lock); | |
2522 | in_dev_put(state->idev); | |
2523 | state->idev = NULL; | |
2524 | } | |
2525 | state->dev = NULL; | |
2526 | read_unlock(&dev_base_lock); | |
2527 | } | |
2528 | ||
2529 | static int igmp_mcf_seq_show(struct seq_file *seq, void *v) | |
2530 | { | |
2531 | struct ip_sf_list *psf = (struct ip_sf_list *)v; | |
2532 | struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq); | |
2533 | ||
2534 | if (v == SEQ_START_TOKEN) { | |
e905a9ed | 2535 | seq_printf(seq, |
1da177e4 LT |
2536 | "%3s %6s " |
2537 | "%10s %10s %6s %6s\n", "Idx", | |
2538 | "Device", "MCA", | |
2539 | "SRC", "INC", "EXC"); | |
2540 | } else { | |
2541 | seq_printf(seq, | |
2542 | "%3d %6.6s 0x%08x " | |
e905a9ed YH |
2543 | "0x%08x %6lu %6lu\n", |
2544 | state->dev->ifindex, state->dev->name, | |
1da177e4 LT |
2545 | ntohl(state->im->multiaddr), |
2546 | ntohl(psf->sf_inaddr), | |
2547 | psf->sf_count[MCAST_INCLUDE], | |
2548 | psf->sf_count[MCAST_EXCLUDE]); | |
2549 | } | |
2550 | return 0; | |
2551 | } | |
2552 | ||
f690808e | 2553 | static const struct seq_operations igmp_mcf_seq_ops = { |
1da177e4 LT |
2554 | .start = igmp_mcf_seq_start, |
2555 | .next = igmp_mcf_seq_next, | |
2556 | .stop = igmp_mcf_seq_stop, | |
2557 | .show = igmp_mcf_seq_show, | |
2558 | }; | |
2559 | ||
2560 | static int igmp_mcf_seq_open(struct inode *inode, struct file *file) | |
2561 | { | |
cf7732e4 PE |
2562 | return seq_open_private(file, &igmp_mcf_seq_ops, |
2563 | sizeof(struct igmp_mcf_iter_state)); | |
1da177e4 LT |
2564 | } |
2565 | ||
9a32144e | 2566 | static const struct file_operations igmp_mcf_seq_fops = { |
1da177e4 LT |
2567 | .owner = THIS_MODULE, |
2568 | .open = igmp_mcf_seq_open, | |
2569 | .read = seq_read, | |
2570 | .llseek = seq_lseek, | |
2571 | .release = seq_release_private, | |
2572 | }; | |
2573 | ||
2574 | int __init igmp_mc_proc_init(void) | |
2575 | { | |
457c4cbc EB |
2576 | proc_net_fops_create(&init_net, "igmp", S_IRUGO, &igmp_mc_seq_fops); |
2577 | proc_net_fops_create(&init_net, "mcfilter", S_IRUGO, &igmp_mcf_seq_fops); | |
1da177e4 LT |
2578 | return 0; |
2579 | } | |
2580 | #endif | |
2581 | ||
2582 | EXPORT_SYMBOL(ip_mc_dec_group); | |
2583 | EXPORT_SYMBOL(ip_mc_inc_group); | |
2584 | EXPORT_SYMBOL(ip_mc_join_group); | |
a816c7c7 | 2585 | EXPORT_SYMBOL(ip_mc_rejoin_group); |