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) \ |
c346dca1 | 133 | (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), 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) \ | |
c346dca1 | 138 | (IPV4_DEVCONF_ALL(dev_net(in_dev->dev), 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 | ||
cd557bc1 DL |
925 | if (in_dev == NULL) |
926 | goto drop; | |
1da177e4 | 927 | |
fb286bb2 | 928 | if (!pskb_may_pull(skb, sizeof(struct igmphdr))) |
cd557bc1 | 929 | goto drop_ref; |
fb286bb2 HX |
930 | |
931 | switch (skb->ip_summed) { | |
84fa7933 | 932 | case CHECKSUM_COMPLETE: |
d3bc23e7 | 933 | if (!csum_fold(skb->csum)) |
fb286bb2 HX |
934 | break; |
935 | /* fall through */ | |
936 | case CHECKSUM_NONE: | |
937 | skb->csum = 0; | |
938 | if (__skb_checksum_complete(skb)) | |
cd557bc1 | 939 | goto drop_ref; |
1da177e4 LT |
940 | } |
941 | ||
d9edf9e2 | 942 | ih = igmp_hdr(skb); |
1da177e4 LT |
943 | switch (ih->type) { |
944 | case IGMP_HOST_MEMBERSHIP_QUERY: | |
945 | igmp_heard_query(in_dev, skb, len); | |
946 | break; | |
947 | case IGMP_HOST_MEMBERSHIP_REPORT: | |
948 | case IGMPV2_HOST_MEMBERSHIP_REPORT: | |
949 | case IGMPV3_HOST_MEMBERSHIP_REPORT: | |
950 | /* Is it our report looped back? */ | |
ee6b9673 | 951 | if (skb->rtable->fl.iif == 0) |
1da177e4 | 952 | break; |
24c69275 DS |
953 | /* don't rely on MC router hearing unicast reports */ |
954 | if (skb->pkt_type == PACKET_MULTICAST || | |
955 | skb->pkt_type == PACKET_BROADCAST) | |
956 | igmp_heard_report(in_dev, ih->group); | |
1da177e4 LT |
957 | break; |
958 | case IGMP_PIM: | |
959 | #ifdef CONFIG_IP_PIMSM_V1 | |
960 | in_dev_put(in_dev); | |
961 | return pim_rcv_v1(skb); | |
962 | #endif | |
963 | case IGMP_DVMRP: | |
964 | case IGMP_TRACE: | |
965 | case IGMP_HOST_LEAVE_MESSAGE: | |
966 | case IGMP_MTRACE: | |
967 | case IGMP_MTRACE_RESP: | |
968 | break; | |
969 | default: | |
dd1c1853 | 970 | break; |
1da177e4 | 971 | } |
fb286bb2 | 972 | |
cd557bc1 | 973 | drop_ref: |
1da177e4 | 974 | in_dev_put(in_dev); |
cd557bc1 | 975 | drop: |
1da177e4 LT |
976 | kfree_skb(skb); |
977 | return 0; | |
978 | } | |
979 | ||
980 | #endif | |
981 | ||
982 | ||
983 | /* | |
984 | * Add a filter to a device | |
985 | */ | |
986 | ||
63007727 | 987 | static void ip_mc_filter_add(struct in_device *in_dev, __be32 addr) |
1da177e4 LT |
988 | { |
989 | char buf[MAX_ADDR_LEN]; | |
990 | struct net_device *dev = in_dev->dev; | |
991 | ||
992 | /* Checking for IFF_MULTICAST here is WRONG-WRONG-WRONG. | |
993 | We will get multicast token leakage, when IFF_MULTICAST | |
994 | is changed. This check should be done in dev->set_multicast_list | |
995 | routine. Something sort of: | |
996 | if (dev->mc_list && dev->flags&IFF_MULTICAST) { do it; } | |
997 | --ANK | |
998 | */ | |
999 | if (arp_mc_map(addr, buf, dev, 0) == 0) | |
1000 | dev_mc_add(dev,buf,dev->addr_len,0); | |
1001 | } | |
1002 | ||
1003 | /* | |
1004 | * Remove a filter from a device | |
1005 | */ | |
1006 | ||
63007727 | 1007 | static void ip_mc_filter_del(struct in_device *in_dev, __be32 addr) |
1da177e4 LT |
1008 | { |
1009 | char buf[MAX_ADDR_LEN]; | |
1010 | struct net_device *dev = in_dev->dev; | |
1011 | ||
1012 | if (arp_mc_map(addr, buf, dev, 0) == 0) | |
1013 | dev_mc_delete(dev,buf,dev->addr_len,0); | |
1014 | } | |
1015 | ||
1016 | #ifdef CONFIG_IP_MULTICAST | |
1017 | /* | |
1018 | * deleted ip_mc_list manipulation | |
1019 | */ | |
1020 | static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im) | |
1021 | { | |
1022 | struct ip_mc_list *pmc; | |
1023 | ||
1024 | /* this is an "ip_mc_list" for convenience; only the fields below | |
1025 | * are actually used. In particular, the refcnt and users are not | |
1026 | * used for management of the delete list. Using the same structure | |
1027 | * for deleted items allows change reports to use common code with | |
1028 | * non-deleted or query-response MCA's. | |
1029 | */ | |
0da974f4 | 1030 | pmc = kzalloc(sizeof(*pmc), GFP_KERNEL); |
1da177e4 LT |
1031 | if (!pmc) |
1032 | return; | |
1da177e4 LT |
1033 | spin_lock_bh(&im->lock); |
1034 | pmc->interface = im->interface; | |
1035 | in_dev_hold(in_dev); | |
1036 | pmc->multiaddr = im->multiaddr; | |
1037 | pmc->crcount = in_dev->mr_qrv ? in_dev->mr_qrv : | |
1038 | IGMP_Unsolicited_Report_Count; | |
1039 | pmc->sfmode = im->sfmode; | |
1040 | if (pmc->sfmode == MCAST_INCLUDE) { | |
1041 | struct ip_sf_list *psf; | |
1042 | ||
1043 | pmc->tomb = im->tomb; | |
1044 | pmc->sources = im->sources; | |
1045 | im->tomb = im->sources = NULL; | |
1046 | for (psf=pmc->sources; psf; psf=psf->sf_next) | |
1047 | psf->sf_crcount = pmc->crcount; | |
1048 | } | |
1049 | spin_unlock_bh(&im->lock); | |
1050 | ||
1051 | spin_lock_bh(&in_dev->mc_tomb_lock); | |
1052 | pmc->next = in_dev->mc_tomb; | |
1053 | in_dev->mc_tomb = pmc; | |
1054 | spin_unlock_bh(&in_dev->mc_tomb_lock); | |
1055 | } | |
1056 | ||
63007727 | 1057 | static void igmpv3_del_delrec(struct in_device *in_dev, __be32 multiaddr) |
1da177e4 LT |
1058 | { |
1059 | struct ip_mc_list *pmc, *pmc_prev; | |
1060 | struct ip_sf_list *psf, *psf_next; | |
1061 | ||
1062 | spin_lock_bh(&in_dev->mc_tomb_lock); | |
1063 | pmc_prev = NULL; | |
1064 | for (pmc=in_dev->mc_tomb; pmc; pmc=pmc->next) { | |
1065 | if (pmc->multiaddr == multiaddr) | |
1066 | break; | |
1067 | pmc_prev = pmc; | |
1068 | } | |
1069 | if (pmc) { | |
1070 | if (pmc_prev) | |
1071 | pmc_prev->next = pmc->next; | |
1072 | else | |
1073 | in_dev->mc_tomb = pmc->next; | |
1074 | } | |
1075 | spin_unlock_bh(&in_dev->mc_tomb_lock); | |
1076 | if (pmc) { | |
1077 | for (psf=pmc->tomb; psf; psf=psf_next) { | |
1078 | psf_next = psf->sf_next; | |
1079 | kfree(psf); | |
1080 | } | |
1081 | in_dev_put(pmc->interface); | |
1082 | kfree(pmc); | |
1083 | } | |
1084 | } | |
1085 | ||
1086 | static void igmpv3_clear_delrec(struct in_device *in_dev) | |
1087 | { | |
1088 | struct ip_mc_list *pmc, *nextpmc; | |
1089 | ||
1090 | spin_lock_bh(&in_dev->mc_tomb_lock); | |
1091 | pmc = in_dev->mc_tomb; | |
1092 | in_dev->mc_tomb = NULL; | |
1093 | spin_unlock_bh(&in_dev->mc_tomb_lock); | |
1094 | ||
1095 | for (; pmc; pmc = nextpmc) { | |
1096 | nextpmc = pmc->next; | |
1097 | ip_mc_clear_src(pmc); | |
1098 | in_dev_put(pmc->interface); | |
1099 | kfree(pmc); | |
1100 | } | |
1101 | /* clear dead sources, too */ | |
1102 | read_lock(&in_dev->mc_list_lock); | |
1103 | for (pmc=in_dev->mc_list; pmc; pmc=pmc->next) { | |
1104 | struct ip_sf_list *psf, *psf_next; | |
1105 | ||
1106 | spin_lock_bh(&pmc->lock); | |
1107 | psf = pmc->tomb; | |
1108 | pmc->tomb = NULL; | |
1109 | spin_unlock_bh(&pmc->lock); | |
1110 | for (; psf; psf=psf_next) { | |
1111 | psf_next = psf->sf_next; | |
1112 | kfree(psf); | |
1113 | } | |
1114 | } | |
1115 | read_unlock(&in_dev->mc_list_lock); | |
1116 | } | |
1117 | #endif | |
1118 | ||
1119 | static void igmp_group_dropped(struct ip_mc_list *im) | |
1120 | { | |
1121 | struct in_device *in_dev = im->interface; | |
1122 | #ifdef CONFIG_IP_MULTICAST | |
1123 | int reporter; | |
1124 | #endif | |
1125 | ||
1126 | if (im->loaded) { | |
1127 | im->loaded = 0; | |
1128 | ip_mc_filter_del(in_dev, im->multiaddr); | |
1129 | } | |
1130 | ||
1131 | #ifdef CONFIG_IP_MULTICAST | |
1132 | if (im->multiaddr == IGMP_ALL_HOSTS) | |
1133 | return; | |
1134 | ||
1135 | reporter = im->reporter; | |
1136 | igmp_stop_timer(im); | |
1137 | ||
1138 | if (!in_dev->dead) { | |
1139 | if (IGMP_V1_SEEN(in_dev)) | |
1140 | goto done; | |
1141 | if (IGMP_V2_SEEN(in_dev)) { | |
1142 | if (reporter) | |
1143 | igmp_send_report(in_dev, im, IGMP_HOST_LEAVE_MESSAGE); | |
1144 | goto done; | |
1145 | } | |
1146 | /* IGMPv3 */ | |
1147 | igmpv3_add_delrec(in_dev, im); | |
1148 | ||
1149 | igmp_ifc_event(in_dev); | |
1150 | } | |
1151 | done: | |
1152 | #endif | |
1153 | ip_mc_clear_src(im); | |
1154 | } | |
1155 | ||
1156 | static void igmp_group_added(struct ip_mc_list *im) | |
1157 | { | |
1158 | struct in_device *in_dev = im->interface; | |
1159 | ||
1160 | if (im->loaded == 0) { | |
1161 | im->loaded = 1; | |
1162 | ip_mc_filter_add(in_dev, im->multiaddr); | |
1163 | } | |
1164 | ||
1165 | #ifdef CONFIG_IP_MULTICAST | |
1166 | if (im->multiaddr == IGMP_ALL_HOSTS) | |
1167 | return; | |
1168 | ||
1169 | if (in_dev->dead) | |
1170 | return; | |
1171 | if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev)) { | |
1172 | spin_lock_bh(&im->lock); | |
1173 | igmp_start_timer(im, IGMP_Initial_Report_Delay); | |
1174 | spin_unlock_bh(&im->lock); | |
1175 | return; | |
1176 | } | |
1177 | /* else, v3 */ | |
1178 | ||
1179 | im->crcount = in_dev->mr_qrv ? in_dev->mr_qrv : | |
1180 | IGMP_Unsolicited_Report_Count; | |
1181 | igmp_ifc_event(in_dev); | |
1182 | #endif | |
1183 | } | |
1184 | ||
1185 | ||
1186 | /* | |
1187 | * Multicast list managers | |
1188 | */ | |
1189 | ||
1190 | ||
1191 | /* | |
1192 | * A socket has joined a multicast group on device dev. | |
1193 | */ | |
1194 | ||
8f935bbd | 1195 | void ip_mc_inc_group(struct in_device *in_dev, __be32 addr) |
1da177e4 LT |
1196 | { |
1197 | struct ip_mc_list *im; | |
1198 | ||
1199 | ASSERT_RTNL(); | |
1200 | ||
c346dca1 | 1201 | if (dev_net(in_dev->dev) != &init_net) |
2430aa85 DL |
1202 | return; |
1203 | ||
1da177e4 LT |
1204 | for (im=in_dev->mc_list; im; im=im->next) { |
1205 | if (im->multiaddr == addr) { | |
1206 | im->users++; | |
1207 | ip_mc_add_src(in_dev, &addr, MCAST_EXCLUDE, 0, NULL, 0); | |
1208 | goto out; | |
1209 | } | |
1210 | } | |
1211 | ||
8b3a7005 | 1212 | im = kmalloc(sizeof(*im), GFP_KERNEL); |
1da177e4 LT |
1213 | if (!im) |
1214 | goto out; | |
1215 | ||
1216 | im->users=1; | |
1217 | im->interface=in_dev; | |
1218 | in_dev_hold(in_dev); | |
1219 | im->multiaddr=addr; | |
1220 | /* initial mode is (EX, empty) */ | |
1221 | im->sfmode = MCAST_EXCLUDE; | |
1222 | im->sfcount[MCAST_INCLUDE] = 0; | |
1223 | im->sfcount[MCAST_EXCLUDE] = 1; | |
1224 | im->sources = NULL; | |
1225 | im->tomb = NULL; | |
1226 | im->crcount = 0; | |
1227 | atomic_set(&im->refcnt, 1); | |
1228 | spin_lock_init(&im->lock); | |
1229 | #ifdef CONFIG_IP_MULTICAST | |
1230 | im->tm_running=0; | |
b24b8a24 | 1231 | setup_timer(&im->timer, &igmp_timer_expire, (unsigned long)im); |
1da177e4 LT |
1232 | im->unsolicit_count = IGMP_Unsolicited_Report_Count; |
1233 | im->reporter = 0; | |
1234 | im->gsquery = 0; | |
1235 | #endif | |
1236 | im->loaded = 0; | |
1237 | write_lock_bh(&in_dev->mc_list_lock); | |
1238 | im->next=in_dev->mc_list; | |
1239 | in_dev->mc_list=im; | |
1240 | write_unlock_bh(&in_dev->mc_list_lock); | |
1241 | #ifdef CONFIG_IP_MULTICAST | |
1242 | igmpv3_del_delrec(in_dev, im->multiaddr); | |
1243 | #endif | |
1244 | igmp_group_added(im); | |
1245 | if (!in_dev->dead) | |
1246 | ip_rt_multicast_event(in_dev); | |
1247 | out: | |
1248 | return; | |
1249 | } | |
1250 | ||
a816c7c7 JV |
1251 | /* |
1252 | * Resend IGMP JOIN report; used for bonding. | |
1253 | */ | |
1254 | void ip_mc_rejoin_group(struct ip_mc_list *im) | |
1255 | { | |
08882669 | 1256 | #ifdef CONFIG_IP_MULTICAST |
a816c7c7 JV |
1257 | struct in_device *in_dev = im->interface; |
1258 | ||
a816c7c7 JV |
1259 | if (im->multiaddr == IGMP_ALL_HOSTS) |
1260 | return; | |
1261 | ||
1262 | if (IGMP_V1_SEEN(in_dev) || IGMP_V2_SEEN(in_dev)) { | |
1263 | igmp_mod_timer(im, IGMP_Initial_Report_Delay); | |
1264 | return; | |
1265 | } | |
1266 | /* else, v3 */ | |
1267 | im->crcount = in_dev->mr_qrv ? in_dev->mr_qrv : | |
1268 | IGMP_Unsolicited_Report_Count; | |
1269 | igmp_ifc_event(in_dev); | |
1270 | #endif | |
1271 | } | |
1272 | ||
1da177e4 LT |
1273 | /* |
1274 | * A socket has left a multicast group on device dev | |
1275 | */ | |
1276 | ||
8f935bbd | 1277 | void ip_mc_dec_group(struct in_device *in_dev, __be32 addr) |
1da177e4 LT |
1278 | { |
1279 | struct ip_mc_list *i, **ip; | |
e905a9ed | 1280 | |
1da177e4 | 1281 | ASSERT_RTNL(); |
e905a9ed | 1282 | |
c346dca1 | 1283 | if (dev_net(in_dev->dev) != &init_net) |
2430aa85 DL |
1284 | return; |
1285 | ||
1da177e4 LT |
1286 | for (ip=&in_dev->mc_list; (i=*ip)!=NULL; ip=&i->next) { |
1287 | if (i->multiaddr==addr) { | |
1288 | if (--i->users == 0) { | |
1289 | write_lock_bh(&in_dev->mc_list_lock); | |
1290 | *ip = i->next; | |
1291 | write_unlock_bh(&in_dev->mc_list_lock); | |
1292 | igmp_group_dropped(i); | |
1293 | ||
1294 | if (!in_dev->dead) | |
1295 | ip_rt_multicast_event(in_dev); | |
1296 | ||
1297 | ip_ma_put(i); | |
1298 | return; | |
1299 | } | |
1300 | break; | |
1301 | } | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | /* Device going down */ | |
1306 | ||
1307 | void ip_mc_down(struct in_device *in_dev) | |
1308 | { | |
1309 | struct ip_mc_list *i; | |
1310 | ||
1311 | ASSERT_RTNL(); | |
1312 | ||
c346dca1 | 1313 | if (dev_net(in_dev->dev) != &init_net) |
2430aa85 DL |
1314 | return; |
1315 | ||
1da177e4 LT |
1316 | for (i=in_dev->mc_list; i; i=i->next) |
1317 | igmp_group_dropped(i); | |
1318 | ||
1319 | #ifdef CONFIG_IP_MULTICAST | |
1320 | in_dev->mr_ifc_count = 0; | |
1321 | if (del_timer(&in_dev->mr_ifc_timer)) | |
1322 | __in_dev_put(in_dev); | |
1323 | in_dev->mr_gq_running = 0; | |
1324 | if (del_timer(&in_dev->mr_gq_timer)) | |
1325 | __in_dev_put(in_dev); | |
1326 | igmpv3_clear_delrec(in_dev); | |
1327 | #endif | |
1328 | ||
1329 | ip_mc_dec_group(in_dev, IGMP_ALL_HOSTS); | |
1330 | } | |
1331 | ||
1332 | void ip_mc_init_dev(struct in_device *in_dev) | |
1333 | { | |
1334 | ASSERT_RTNL(); | |
1335 | ||
c346dca1 | 1336 | if (dev_net(in_dev->dev) != &init_net) |
2430aa85 DL |
1337 | return; |
1338 | ||
1da177e4 LT |
1339 | in_dev->mc_tomb = NULL; |
1340 | #ifdef CONFIG_IP_MULTICAST | |
1341 | in_dev->mr_gq_running = 0; | |
b24b8a24 PE |
1342 | setup_timer(&in_dev->mr_gq_timer, igmp_gq_timer_expire, |
1343 | (unsigned long)in_dev); | |
1da177e4 | 1344 | in_dev->mr_ifc_count = 0; |
b24b8a24 PE |
1345 | setup_timer(&in_dev->mr_ifc_timer, igmp_ifc_timer_expire, |
1346 | (unsigned long)in_dev); | |
1da177e4 LT |
1347 | in_dev->mr_qrv = IGMP_Unsolicited_Report_Count; |
1348 | #endif | |
1349 | ||
1350 | rwlock_init(&in_dev->mc_list_lock); | |
1351 | spin_lock_init(&in_dev->mc_tomb_lock); | |
1352 | } | |
1353 | ||
1354 | /* Device going up */ | |
1355 | ||
1356 | void ip_mc_up(struct in_device *in_dev) | |
1357 | { | |
1358 | struct ip_mc_list *i; | |
1359 | ||
1360 | ASSERT_RTNL(); | |
1361 | ||
c346dca1 | 1362 | if (dev_net(in_dev->dev) != &init_net) |
2430aa85 DL |
1363 | return; |
1364 | ||
1da177e4 LT |
1365 | ip_mc_inc_group(in_dev, IGMP_ALL_HOSTS); |
1366 | ||
1367 | for (i=in_dev->mc_list; i; i=i->next) | |
1368 | igmp_group_added(i); | |
1369 | } | |
1370 | ||
1371 | /* | |
1372 | * Device is about to be destroyed: clean up. | |
1373 | */ | |
1374 | ||
1375 | void ip_mc_destroy_dev(struct in_device *in_dev) | |
1376 | { | |
1377 | struct ip_mc_list *i; | |
1378 | ||
1379 | ASSERT_RTNL(); | |
1380 | ||
c346dca1 | 1381 | if (dev_net(in_dev->dev) != &init_net) |
2430aa85 DL |
1382 | return; |
1383 | ||
1da177e4 LT |
1384 | /* Deactivate timers */ |
1385 | ip_mc_down(in_dev); | |
1386 | ||
1387 | write_lock_bh(&in_dev->mc_list_lock); | |
1388 | while ((i = in_dev->mc_list) != NULL) { | |
1389 | in_dev->mc_list = i->next; | |
1390 | write_unlock_bh(&in_dev->mc_list_lock); | |
1391 | ||
1392 | igmp_group_dropped(i); | |
1393 | ip_ma_put(i); | |
1394 | ||
1395 | write_lock_bh(&in_dev->mc_list_lock); | |
1396 | } | |
1397 | write_unlock_bh(&in_dev->mc_list_lock); | |
1398 | } | |
1399 | ||
1400 | static struct in_device * ip_mc_find_dev(struct ip_mreqn *imr) | |
1401 | { | |
1402 | struct flowi fl = { .nl_u = { .ip4_u = | |
1403 | { .daddr = imr->imr_multiaddr.s_addr } } }; | |
1404 | struct rtable *rt; | |
1405 | struct net_device *dev = NULL; | |
1406 | struct in_device *idev = NULL; | |
1407 | ||
1408 | if (imr->imr_ifindex) { | |
7fee0ca2 | 1409 | idev = inetdev_by_index(&init_net, imr->imr_ifindex); |
1da177e4 LT |
1410 | if (idev) |
1411 | __in_dev_put(idev); | |
1412 | return idev; | |
1413 | } | |
1414 | if (imr->imr_address.s_addr) { | |
1ab35276 | 1415 | dev = ip_dev_find(&init_net, imr->imr_address.s_addr); |
1da177e4 LT |
1416 | if (!dev) |
1417 | return NULL; | |
15333061 | 1418 | dev_put(dev); |
1da177e4 LT |
1419 | } |
1420 | ||
f206351a | 1421 | if (!dev && !ip_route_output_key(&init_net, &rt, &fl)) { |
1da177e4 LT |
1422 | dev = rt->u.dst.dev; |
1423 | ip_rt_put(rt); | |
1424 | } | |
1425 | if (dev) { | |
1426 | imr->imr_ifindex = dev->ifindex; | |
e5ed6399 | 1427 | idev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
1428 | } |
1429 | return idev; | |
1430 | } | |
1431 | ||
1432 | /* | |
1433 | * Join a socket to a group | |
1434 | */ | |
ab32ea5d BH |
1435 | int sysctl_igmp_max_memberships __read_mostly = IP_MAX_MEMBERSHIPS; |
1436 | int sysctl_igmp_max_msf __read_mostly = IP_MAX_MSF; | |
1da177e4 LT |
1437 | |
1438 | ||
1439 | static int ip_mc_del1_src(struct ip_mc_list *pmc, int sfmode, | |
8f935bbd | 1440 | __be32 *psfsrc) |
1da177e4 LT |
1441 | { |
1442 | struct ip_sf_list *psf, *psf_prev; | |
1443 | int rv = 0; | |
1444 | ||
1445 | psf_prev = NULL; | |
1446 | for (psf=pmc->sources; psf; psf=psf->sf_next) { | |
1447 | if (psf->sf_inaddr == *psfsrc) | |
1448 | break; | |
1449 | psf_prev = psf; | |
1450 | } | |
1451 | if (!psf || psf->sf_count[sfmode] == 0) { | |
1452 | /* source filter not found, or count wrong => bug */ | |
1453 | return -ESRCH; | |
1454 | } | |
1455 | psf->sf_count[sfmode]--; | |
1456 | if (psf->sf_count[sfmode] == 0) { | |
1457 | ip_rt_multicast_event(pmc->interface); | |
1458 | } | |
1459 | if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) { | |
1460 | #ifdef CONFIG_IP_MULTICAST | |
1461 | struct in_device *in_dev = pmc->interface; | |
1462 | #endif | |
1463 | ||
1464 | /* no more filters for this source */ | |
1465 | if (psf_prev) | |
1466 | psf_prev->sf_next = psf->sf_next; | |
1467 | else | |
1468 | pmc->sources = psf->sf_next; | |
1469 | #ifdef CONFIG_IP_MULTICAST | |
1470 | if (psf->sf_oldin && | |
1471 | !IGMP_V1_SEEN(in_dev) && !IGMP_V2_SEEN(in_dev)) { | |
e905a9ed | 1472 | psf->sf_crcount = in_dev->mr_qrv ? in_dev->mr_qrv : |
1da177e4 LT |
1473 | IGMP_Unsolicited_Report_Count; |
1474 | psf->sf_next = pmc->tomb; | |
1475 | pmc->tomb = psf; | |
1476 | rv = 1; | |
1477 | } else | |
1478 | #endif | |
1479 | kfree(psf); | |
1480 | } | |
1481 | return rv; | |
1482 | } | |
1483 | ||
1484 | #ifndef CONFIG_IP_MULTICAST | |
1485 | #define igmp_ifc_event(x) do { } while (0) | |
1486 | #endif | |
1487 | ||
8f935bbd AV |
1488 | static int ip_mc_del_src(struct in_device *in_dev, __be32 *pmca, int sfmode, |
1489 | int sfcount, __be32 *psfsrc, int delta) | |
1da177e4 LT |
1490 | { |
1491 | struct ip_mc_list *pmc; | |
1492 | int changerec = 0; | |
1493 | int i, err; | |
1494 | ||
1495 | if (!in_dev) | |
1496 | return -ENODEV; | |
1497 | read_lock(&in_dev->mc_list_lock); | |
1498 | for (pmc=in_dev->mc_list; pmc; pmc=pmc->next) { | |
1499 | if (*pmca == pmc->multiaddr) | |
1500 | break; | |
1501 | } | |
1502 | if (!pmc) { | |
1503 | /* MCA not found?? bug */ | |
1504 | read_unlock(&in_dev->mc_list_lock); | |
1505 | return -ESRCH; | |
1506 | } | |
1507 | spin_lock_bh(&pmc->lock); | |
1508 | read_unlock(&in_dev->mc_list_lock); | |
1509 | #ifdef CONFIG_IP_MULTICAST | |
1510 | sf_markstate(pmc); | |
1511 | #endif | |
1512 | if (!delta) { | |
1513 | err = -EINVAL; | |
1514 | if (!pmc->sfcount[sfmode]) | |
1515 | goto out_unlock; | |
1516 | pmc->sfcount[sfmode]--; | |
1517 | } | |
1518 | err = 0; | |
1519 | for (i=0; i<sfcount; i++) { | |
1520 | int rv = ip_mc_del1_src(pmc, sfmode, &psfsrc[i]); | |
1521 | ||
1522 | changerec |= rv > 0; | |
1523 | if (!err && rv < 0) | |
1524 | err = rv; | |
1525 | } | |
1526 | if (pmc->sfmode == MCAST_EXCLUDE && | |
1527 | pmc->sfcount[MCAST_EXCLUDE] == 0 && | |
1528 | pmc->sfcount[MCAST_INCLUDE]) { | |
1529 | #ifdef CONFIG_IP_MULTICAST | |
1530 | struct ip_sf_list *psf; | |
1531 | #endif | |
1532 | ||
1533 | /* filter mode change */ | |
1534 | pmc->sfmode = MCAST_INCLUDE; | |
1535 | #ifdef CONFIG_IP_MULTICAST | |
e905a9ed | 1536 | pmc->crcount = in_dev->mr_qrv ? in_dev->mr_qrv : |
1da177e4 LT |
1537 | IGMP_Unsolicited_Report_Count; |
1538 | in_dev->mr_ifc_count = pmc->crcount; | |
1539 | for (psf=pmc->sources; psf; psf = psf->sf_next) | |
1540 | psf->sf_crcount = 0; | |
1541 | igmp_ifc_event(pmc->interface); | |
1542 | } else if (sf_setstate(pmc) || changerec) { | |
1543 | igmp_ifc_event(pmc->interface); | |
1544 | #endif | |
1545 | } | |
1546 | out_unlock: | |
1547 | spin_unlock_bh(&pmc->lock); | |
1548 | return err; | |
1549 | } | |
1550 | ||
1551 | /* | |
1552 | * Add multicast single-source filter to the interface list | |
1553 | */ | |
1554 | static int ip_mc_add1_src(struct ip_mc_list *pmc, int sfmode, | |
8f935bbd | 1555 | __be32 *psfsrc, int delta) |
1da177e4 LT |
1556 | { |
1557 | struct ip_sf_list *psf, *psf_prev; | |
1558 | ||
1559 | psf_prev = NULL; | |
1560 | for (psf=pmc->sources; psf; psf=psf->sf_next) { | |
1561 | if (psf->sf_inaddr == *psfsrc) | |
1562 | break; | |
1563 | psf_prev = psf; | |
1564 | } | |
1565 | if (!psf) { | |
0da974f4 | 1566 | psf = kzalloc(sizeof(*psf), GFP_ATOMIC); |
1da177e4 LT |
1567 | if (!psf) |
1568 | return -ENOBUFS; | |
1da177e4 LT |
1569 | psf->sf_inaddr = *psfsrc; |
1570 | if (psf_prev) { | |
1571 | psf_prev->sf_next = psf; | |
1572 | } else | |
1573 | pmc->sources = psf; | |
1574 | } | |
1575 | psf->sf_count[sfmode]++; | |
1576 | if (psf->sf_count[sfmode] == 1) { | |
1577 | ip_rt_multicast_event(pmc->interface); | |
1578 | } | |
1579 | return 0; | |
1580 | } | |
1581 | ||
1582 | #ifdef CONFIG_IP_MULTICAST | |
1583 | static void sf_markstate(struct ip_mc_list *pmc) | |
1584 | { | |
1585 | struct ip_sf_list *psf; | |
1586 | int mca_xcount = pmc->sfcount[MCAST_EXCLUDE]; | |
1587 | ||
1588 | for (psf=pmc->sources; psf; psf=psf->sf_next) | |
1589 | if (pmc->sfcount[MCAST_EXCLUDE]) { | |
1590 | psf->sf_oldin = mca_xcount == | |
1591 | psf->sf_count[MCAST_EXCLUDE] && | |
1592 | !psf->sf_count[MCAST_INCLUDE]; | |
1593 | } else | |
1594 | psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0; | |
1595 | } | |
1596 | ||
1597 | static int sf_setstate(struct ip_mc_list *pmc) | |
1598 | { | |
ad12583f | 1599 | struct ip_sf_list *psf, *dpsf; |
1da177e4 LT |
1600 | int mca_xcount = pmc->sfcount[MCAST_EXCLUDE]; |
1601 | int qrv = pmc->interface->mr_qrv; | |
1602 | int new_in, rv; | |
1603 | ||
1604 | rv = 0; | |
1605 | for (psf=pmc->sources; psf; psf=psf->sf_next) { | |
1606 | if (pmc->sfcount[MCAST_EXCLUDE]) { | |
1607 | new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] && | |
1608 | !psf->sf_count[MCAST_INCLUDE]; | |
1609 | } else | |
1610 | new_in = psf->sf_count[MCAST_INCLUDE] != 0; | |
ad12583f DS |
1611 | if (new_in) { |
1612 | if (!psf->sf_oldin) { | |
76edc605 | 1613 | struct ip_sf_list *prev = NULL; |
ad12583f DS |
1614 | |
1615 | for (dpsf=pmc->tomb; dpsf; dpsf=dpsf->sf_next) { | |
1616 | if (dpsf->sf_inaddr == psf->sf_inaddr) | |
1617 | break; | |
1618 | prev = dpsf; | |
1619 | } | |
1620 | if (dpsf) { | |
1621 | if (prev) | |
1622 | prev->sf_next = dpsf->sf_next; | |
1623 | else | |
1624 | pmc->tomb = dpsf->sf_next; | |
1625 | kfree(dpsf); | |
1626 | } | |
1627 | psf->sf_crcount = qrv; | |
1628 | rv++; | |
1629 | } | |
1630 | } else if (psf->sf_oldin) { | |
1631 | ||
1632 | psf->sf_crcount = 0; | |
1633 | /* | |
1634 | * add or update "delete" records if an active filter | |
1635 | * is now inactive | |
1636 | */ | |
1637 | for (dpsf=pmc->tomb; dpsf; dpsf=dpsf->sf_next) | |
1638 | if (dpsf->sf_inaddr == psf->sf_inaddr) | |
1639 | break; | |
1640 | if (!dpsf) { | |
1641 | dpsf = (struct ip_sf_list *) | |
1642 | kmalloc(sizeof(*dpsf), GFP_ATOMIC); | |
1643 | if (!dpsf) | |
1644 | continue; | |
1645 | *dpsf = *psf; | |
1646 | /* pmc->lock held by callers */ | |
1647 | dpsf->sf_next = pmc->tomb; | |
1648 | pmc->tomb = dpsf; | |
1649 | } | |
1650 | dpsf->sf_crcount = qrv; | |
1da177e4 LT |
1651 | rv++; |
1652 | } | |
1653 | } | |
1654 | return rv; | |
1655 | } | |
1656 | #endif | |
1657 | ||
1658 | /* | |
1659 | * Add multicast source filter list to the interface list | |
1660 | */ | |
8f935bbd AV |
1661 | static int ip_mc_add_src(struct in_device *in_dev, __be32 *pmca, int sfmode, |
1662 | int sfcount, __be32 *psfsrc, int delta) | |
1da177e4 LT |
1663 | { |
1664 | struct ip_mc_list *pmc; | |
1665 | int isexclude; | |
1666 | int i, err; | |
1667 | ||
1668 | if (!in_dev) | |
1669 | return -ENODEV; | |
1670 | read_lock(&in_dev->mc_list_lock); | |
1671 | for (pmc=in_dev->mc_list; pmc; pmc=pmc->next) { | |
1672 | if (*pmca == pmc->multiaddr) | |
1673 | break; | |
1674 | } | |
1675 | if (!pmc) { | |
1676 | /* MCA not found?? bug */ | |
1677 | read_unlock(&in_dev->mc_list_lock); | |
1678 | return -ESRCH; | |
1679 | } | |
1680 | spin_lock_bh(&pmc->lock); | |
1681 | read_unlock(&in_dev->mc_list_lock); | |
1682 | ||
1683 | #ifdef CONFIG_IP_MULTICAST | |
1684 | sf_markstate(pmc); | |
1685 | #endif | |
1686 | isexclude = pmc->sfmode == MCAST_EXCLUDE; | |
1687 | if (!delta) | |
1688 | pmc->sfcount[sfmode]++; | |
1689 | err = 0; | |
1690 | for (i=0; i<sfcount; i++) { | |
1691 | err = ip_mc_add1_src(pmc, sfmode, &psfsrc[i], delta); | |
1692 | if (err) | |
1693 | break; | |
1694 | } | |
1695 | if (err) { | |
1696 | int j; | |
1697 | ||
1698 | pmc->sfcount[sfmode]--; | |
1699 | for (j=0; j<i; j++) | |
1700 | (void) ip_mc_del1_src(pmc, sfmode, &psfsrc[i]); | |
1701 | } else if (isexclude != (pmc->sfcount[MCAST_EXCLUDE] != 0)) { | |
1702 | #ifdef CONFIG_IP_MULTICAST | |
1da177e4 | 1703 | struct ip_sf_list *psf; |
cfcabdcc | 1704 | in_dev = pmc->interface; |
1da177e4 LT |
1705 | #endif |
1706 | ||
1707 | /* filter mode change */ | |
1708 | if (pmc->sfcount[MCAST_EXCLUDE]) | |
1709 | pmc->sfmode = MCAST_EXCLUDE; | |
1710 | else if (pmc->sfcount[MCAST_INCLUDE]) | |
1711 | pmc->sfmode = MCAST_INCLUDE; | |
1712 | #ifdef CONFIG_IP_MULTICAST | |
1713 | /* else no filters; keep old mode for reports */ | |
1714 | ||
e905a9ed | 1715 | pmc->crcount = in_dev->mr_qrv ? in_dev->mr_qrv : |
1da177e4 LT |
1716 | IGMP_Unsolicited_Report_Count; |
1717 | in_dev->mr_ifc_count = pmc->crcount; | |
1718 | for (psf=pmc->sources; psf; psf = psf->sf_next) | |
1719 | psf->sf_crcount = 0; | |
1720 | igmp_ifc_event(in_dev); | |
1721 | } else if (sf_setstate(pmc)) { | |
1722 | igmp_ifc_event(in_dev); | |
1723 | #endif | |
1724 | } | |
1725 | spin_unlock_bh(&pmc->lock); | |
1726 | return err; | |
1727 | } | |
1728 | ||
1729 | static void ip_mc_clear_src(struct ip_mc_list *pmc) | |
1730 | { | |
1731 | struct ip_sf_list *psf, *nextpsf; | |
1732 | ||
1733 | for (psf=pmc->tomb; psf; psf=nextpsf) { | |
1734 | nextpsf = psf->sf_next; | |
1735 | kfree(psf); | |
1736 | } | |
1737 | pmc->tomb = NULL; | |
1738 | for (psf=pmc->sources; psf; psf=nextpsf) { | |
1739 | nextpsf = psf->sf_next; | |
1740 | kfree(psf); | |
1741 | } | |
1742 | pmc->sources = NULL; | |
1743 | pmc->sfmode = MCAST_EXCLUDE; | |
de9daad9 | 1744 | pmc->sfcount[MCAST_INCLUDE] = 0; |
1da177e4 LT |
1745 | pmc->sfcount[MCAST_EXCLUDE] = 1; |
1746 | } | |
1747 | ||
1748 | ||
1749 | /* | |
1750 | * Join a multicast group | |
1751 | */ | |
1752 | int ip_mc_join_group(struct sock *sk , struct ip_mreqn *imr) | |
1753 | { | |
1754 | int err; | |
8f935bbd | 1755 | __be32 addr = imr->imr_multiaddr.s_addr; |
ca9b907d | 1756 | struct ip_mc_socklist *iml=NULL, *i; |
1da177e4 LT |
1757 | struct in_device *in_dev; |
1758 | struct inet_sock *inet = inet_sk(sk); | |
ca9b907d | 1759 | int ifindex; |
1da177e4 LT |
1760 | int count = 0; |
1761 | ||
f97c1e0c | 1762 | if (!ipv4_is_multicast(addr)) |
1da177e4 LT |
1763 | return -EINVAL; |
1764 | ||
3b1e0a65 | 1765 | if (sock_net(sk) != &init_net) |
2430aa85 DL |
1766 | return -EPROTONOSUPPORT; |
1767 | ||
6756ae4b | 1768 | rtnl_lock(); |
1da177e4 LT |
1769 | |
1770 | in_dev = ip_mc_find_dev(imr); | |
1771 | ||
1772 | if (!in_dev) { | |
1773 | iml = NULL; | |
1774 | err = -ENODEV; | |
1775 | goto done; | |
1776 | } | |
1777 | ||
1da177e4 | 1778 | err = -EADDRINUSE; |
ca9b907d | 1779 | ifindex = imr->imr_ifindex; |
1da177e4 | 1780 | for (i = inet->mc_list; i; i = i->next) { |
ca9b907d DS |
1781 | if (i->multi.imr_multiaddr.s_addr == addr && |
1782 | i->multi.imr_ifindex == ifindex) | |
1da177e4 | 1783 | goto done; |
1da177e4 LT |
1784 | count++; |
1785 | } | |
1786 | err = -ENOBUFS; | |
ca9b907d DS |
1787 | if (count >= sysctl_igmp_max_memberships) |
1788 | goto done; | |
8b3a7005 | 1789 | iml = sock_kmalloc(sk,sizeof(*iml),GFP_KERNEL); |
ca9b907d | 1790 | if (iml == NULL) |
1da177e4 | 1791 | goto done; |
ca9b907d | 1792 | |
1da177e4 LT |
1793 | memcpy(&iml->multi, imr, sizeof(*imr)); |
1794 | iml->next = inet->mc_list; | |
1da177e4 LT |
1795 | iml->sflist = NULL; |
1796 | iml->sfmode = MCAST_EXCLUDE; | |
1797 | inet->mc_list = iml; | |
1798 | ip_mc_inc_group(in_dev, addr); | |
1da177e4 | 1799 | err = 0; |
1da177e4 | 1800 | done: |
6756ae4b | 1801 | rtnl_unlock(); |
1da177e4 LT |
1802 | return err; |
1803 | } | |
1804 | ||
1805 | static int ip_mc_leave_src(struct sock *sk, struct ip_mc_socklist *iml, | |
1806 | struct in_device *in_dev) | |
1807 | { | |
1808 | int err; | |
1809 | ||
cfcabdcc | 1810 | if (iml->sflist == NULL) { |
1da177e4 LT |
1811 | /* any-source empty exclude case */ |
1812 | return ip_mc_del_src(in_dev, &iml->multi.imr_multiaddr.s_addr, | |
1813 | iml->sfmode, 0, NULL, 0); | |
1814 | } | |
1815 | err = ip_mc_del_src(in_dev, &iml->multi.imr_multiaddr.s_addr, | |
1816 | iml->sfmode, iml->sflist->sl_count, | |
1817 | iml->sflist->sl_addr, 0); | |
1818 | sock_kfree_s(sk, iml->sflist, IP_SFLSIZE(iml->sflist->sl_max)); | |
1819 | iml->sflist = NULL; | |
1820 | return err; | |
1821 | } | |
1822 | ||
1823 | /* | |
1824 | * Ask a socket to leave a group. | |
1825 | */ | |
1826 | ||
1827 | int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr) | |
1828 | { | |
1829 | struct inet_sock *inet = inet_sk(sk); | |
1830 | struct ip_mc_socklist *iml, **imlp; | |
84b42bae | 1831 | struct in_device *in_dev; |
8f935bbd | 1832 | __be32 group = imr->imr_multiaddr.s_addr; |
84b42bae | 1833 | u32 ifindex; |
acd6e00b | 1834 | int ret = -EADDRNOTAVAIL; |
1da177e4 | 1835 | |
3b1e0a65 | 1836 | if (sock_net(sk) != &init_net) |
2430aa85 DL |
1837 | return -EPROTONOSUPPORT; |
1838 | ||
1da177e4 | 1839 | rtnl_lock(); |
84b42bae | 1840 | in_dev = ip_mc_find_dev(imr); |
84b42bae | 1841 | ifindex = imr->imr_ifindex; |
1da177e4 | 1842 | for (imlp = &inet->mc_list; (iml = *imlp) != NULL; imlp = &iml->next) { |
acd6e00b DS |
1843 | if (iml->multi.imr_multiaddr.s_addr != group) |
1844 | continue; | |
1845 | if (ifindex) { | |
1846 | if (iml->multi.imr_ifindex != ifindex) | |
1847 | continue; | |
1848 | } else if (imr->imr_address.s_addr && imr->imr_address.s_addr != | |
1849 | iml->multi.imr_address.s_addr) | |
1850 | continue; | |
1da177e4 | 1851 | |
acd6e00b | 1852 | (void) ip_mc_leave_src(sk, iml, in_dev); |
1da177e4 | 1853 | |
acd6e00b DS |
1854 | *imlp = iml->next; |
1855 | ||
1856 | if (in_dev) | |
84b42bae | 1857 | ip_mc_dec_group(in_dev, group); |
acd6e00b DS |
1858 | rtnl_unlock(); |
1859 | sock_kfree_s(sk, iml, sizeof(*iml)); | |
1860 | return 0; | |
1da177e4 | 1861 | } |
acd6e00b DS |
1862 | if (!in_dev) |
1863 | ret = -ENODEV; | |
1da177e4 | 1864 | rtnl_unlock(); |
acd6e00b | 1865 | return ret; |
1da177e4 LT |
1866 | } |
1867 | ||
1868 | int ip_mc_source(int add, int omode, struct sock *sk, struct | |
1869 | ip_mreq_source *mreqs, int ifindex) | |
1870 | { | |
1871 | int err; | |
1872 | struct ip_mreqn imr; | |
63007727 | 1873 | __be32 addr = mreqs->imr_multiaddr; |
1da177e4 LT |
1874 | struct ip_mc_socklist *pmc; |
1875 | struct in_device *in_dev = NULL; | |
1876 | struct inet_sock *inet = inet_sk(sk); | |
1877 | struct ip_sf_socklist *psl; | |
8cdaaa15 | 1878 | int leavegroup = 0; |
1da177e4 LT |
1879 | int i, j, rv; |
1880 | ||
f97c1e0c | 1881 | if (!ipv4_is_multicast(addr)) |
1da177e4 LT |
1882 | return -EINVAL; |
1883 | ||
3b1e0a65 | 1884 | if (sock_net(sk) != &init_net) |
2430aa85 DL |
1885 | return -EPROTONOSUPPORT; |
1886 | ||
6756ae4b | 1887 | rtnl_lock(); |
1da177e4 LT |
1888 | |
1889 | imr.imr_multiaddr.s_addr = mreqs->imr_multiaddr; | |
1890 | imr.imr_address.s_addr = mreqs->imr_interface; | |
1891 | imr.imr_ifindex = ifindex; | |
1892 | in_dev = ip_mc_find_dev(&imr); | |
1893 | ||
1894 | if (!in_dev) { | |
1895 | err = -ENODEV; | |
1896 | goto done; | |
1897 | } | |
1898 | err = -EADDRNOTAVAIL; | |
1899 | ||
1900 | for (pmc=inet->mc_list; pmc; pmc=pmc->next) { | |
ca9b907d DS |
1901 | if (pmc->multi.imr_multiaddr.s_addr == imr.imr_multiaddr.s_addr |
1902 | && pmc->multi.imr_ifindex == imr.imr_ifindex) | |
1da177e4 LT |
1903 | break; |
1904 | } | |
917f2f10 DS |
1905 | if (!pmc) { /* must have a prior join */ |
1906 | err = -EINVAL; | |
1da177e4 | 1907 | goto done; |
917f2f10 | 1908 | } |
1da177e4 LT |
1909 | /* if a source filter was set, must be the same mode as before */ |
1910 | if (pmc->sflist) { | |
917f2f10 DS |
1911 | if (pmc->sfmode != omode) { |
1912 | err = -EINVAL; | |
1da177e4 | 1913 | goto done; |
917f2f10 | 1914 | } |
1da177e4 LT |
1915 | } else if (pmc->sfmode != omode) { |
1916 | /* allow mode switches for empty-set filters */ | |
1917 | ip_mc_add_src(in_dev, &mreqs->imr_multiaddr, omode, 0, NULL, 0); | |
e905a9ed | 1918 | ip_mc_del_src(in_dev, &mreqs->imr_multiaddr, pmc->sfmode, 0, |
1da177e4 LT |
1919 | NULL, 0); |
1920 | pmc->sfmode = omode; | |
1921 | } | |
1922 | ||
1923 | psl = pmc->sflist; | |
1924 | if (!add) { | |
1925 | if (!psl) | |
917f2f10 | 1926 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 LT |
1927 | rv = !0; |
1928 | for (i=0; i<psl->sl_count; i++) { | |
1929 | rv = memcmp(&psl->sl_addr[i], &mreqs->imr_sourceaddr, | |
63007727 | 1930 | sizeof(__be32)); |
1da177e4 LT |
1931 | if (rv == 0) |
1932 | break; | |
1933 | } | |
1934 | if (rv) /* source not found */ | |
917f2f10 | 1935 | goto done; /* err = -EADDRNOTAVAIL */ |
1da177e4 | 1936 | |
8cdaaa15 DS |
1937 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
1938 | if (psl->sl_count == 1 && omode == MCAST_INCLUDE) { | |
1939 | leavegroup = 1; | |
1940 | goto done; | |
1941 | } | |
1942 | ||
1da177e4 | 1943 | /* update the interface filter */ |
e905a9ed | 1944 | ip_mc_del_src(in_dev, &mreqs->imr_multiaddr, omode, 1, |
1da177e4 LT |
1945 | &mreqs->imr_sourceaddr, 1); |
1946 | ||
1947 | for (j=i+1; j<psl->sl_count; j++) | |
1948 | psl->sl_addr[j-1] = psl->sl_addr[j]; | |
1949 | psl->sl_count--; | |
1950 | err = 0; | |
1951 | goto done; | |
1952 | } | |
1953 | /* else, add a new source to the filter */ | |
1954 | ||
1955 | if (psl && psl->sl_count >= sysctl_igmp_max_msf) { | |
1956 | err = -ENOBUFS; | |
1957 | goto done; | |
1958 | } | |
1959 | if (!psl || psl->sl_count == psl->sl_max) { | |
1960 | struct ip_sf_socklist *newpsl; | |
1961 | int count = IP_SFBLOCK; | |
1962 | ||
1963 | if (psl) | |
1964 | count += psl->sl_max; | |
8b3a7005 | 1965 | newpsl = sock_kmalloc(sk, IP_SFLSIZE(count), GFP_KERNEL); |
1da177e4 LT |
1966 | if (!newpsl) { |
1967 | err = -ENOBUFS; | |
1968 | goto done; | |
1969 | } | |
1970 | newpsl->sl_max = count; | |
1971 | newpsl->sl_count = count - IP_SFBLOCK; | |
1972 | if (psl) { | |
1973 | for (i=0; i<psl->sl_count; i++) | |
1974 | newpsl->sl_addr[i] = psl->sl_addr[i]; | |
1975 | sock_kfree_s(sk, psl, IP_SFLSIZE(psl->sl_max)); | |
1976 | } | |
1977 | pmc->sflist = psl = newpsl; | |
1978 | } | |
1979 | rv = 1; /* > 0 for insert logic below if sl_count is 0 */ | |
1980 | for (i=0; i<psl->sl_count; i++) { | |
1981 | rv = memcmp(&psl->sl_addr[i], &mreqs->imr_sourceaddr, | |
63007727 | 1982 | sizeof(__be32)); |
1da177e4 LT |
1983 | if (rv == 0) |
1984 | break; | |
1985 | } | |
1986 | if (rv == 0) /* address already there is an error */ | |
1987 | goto done; | |
1988 | for (j=psl->sl_count-1; j>=i; j--) | |
1989 | psl->sl_addr[j+1] = psl->sl_addr[j]; | |
1990 | psl->sl_addr[i] = mreqs->imr_sourceaddr; | |
1991 | psl->sl_count++; | |
1992 | err = 0; | |
1993 | /* update the interface list */ | |
e905a9ed | 1994 | ip_mc_add_src(in_dev, &mreqs->imr_multiaddr, omode, 1, |
1da177e4 LT |
1995 | &mreqs->imr_sourceaddr, 1); |
1996 | done: | |
6756ae4b | 1997 | rtnl_unlock(); |
8cdaaa15 DS |
1998 | if (leavegroup) |
1999 | return ip_mc_leave_group(sk, &imr); | |
1da177e4 LT |
2000 | return err; |
2001 | } | |
2002 | ||
2003 | int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf, int ifindex) | |
2004 | { | |
9951f036 | 2005 | int err = 0; |
1da177e4 | 2006 | struct ip_mreqn imr; |
63007727 | 2007 | __be32 addr = msf->imsf_multiaddr; |
1da177e4 LT |
2008 | struct ip_mc_socklist *pmc; |
2009 | struct in_device *in_dev; | |
2010 | struct inet_sock *inet = inet_sk(sk); | |
2011 | struct ip_sf_socklist *newpsl, *psl; | |
9951f036 | 2012 | int leavegroup = 0; |
1da177e4 | 2013 | |
f97c1e0c | 2014 | if (!ipv4_is_multicast(addr)) |
1da177e4 LT |
2015 | return -EINVAL; |
2016 | if (msf->imsf_fmode != MCAST_INCLUDE && | |
2017 | msf->imsf_fmode != MCAST_EXCLUDE) | |
2018 | return -EINVAL; | |
2019 | ||
3b1e0a65 | 2020 | if (sock_net(sk) != &init_net) |
2430aa85 DL |
2021 | return -EPROTONOSUPPORT; |
2022 | ||
6756ae4b | 2023 | rtnl_lock(); |
1da177e4 LT |
2024 | |
2025 | imr.imr_multiaddr.s_addr = msf->imsf_multiaddr; | |
2026 | imr.imr_address.s_addr = msf->imsf_interface; | |
2027 | imr.imr_ifindex = ifindex; | |
2028 | in_dev = ip_mc_find_dev(&imr); | |
2029 | ||
2030 | if (!in_dev) { | |
2031 | err = -ENODEV; | |
2032 | goto done; | |
2033 | } | |
1da177e4 | 2034 | |
9951f036 DS |
2035 | /* special case - (INCLUDE, empty) == LEAVE_GROUP */ |
2036 | if (msf->imsf_fmode == MCAST_INCLUDE && msf->imsf_numsrc == 0) { | |
2037 | leavegroup = 1; | |
2038 | goto done; | |
2039 | } | |
2040 | ||
1da177e4 LT |
2041 | for (pmc=inet->mc_list; pmc; pmc=pmc->next) { |
2042 | if (pmc->multi.imr_multiaddr.s_addr == msf->imsf_multiaddr && | |
2043 | pmc->multi.imr_ifindex == imr.imr_ifindex) | |
2044 | break; | |
2045 | } | |
917f2f10 DS |
2046 | if (!pmc) { /* must have a prior join */ |
2047 | err = -EINVAL; | |
1da177e4 | 2048 | goto done; |
917f2f10 | 2049 | } |
1da177e4 | 2050 | if (msf->imsf_numsrc) { |
8b3a7005 KK |
2051 | newpsl = sock_kmalloc(sk, IP_SFLSIZE(msf->imsf_numsrc), |
2052 | GFP_KERNEL); | |
1da177e4 LT |
2053 | if (!newpsl) { |
2054 | err = -ENOBUFS; | |
2055 | goto done; | |
2056 | } | |
2057 | newpsl->sl_max = newpsl->sl_count = msf->imsf_numsrc; | |
2058 | memcpy(newpsl->sl_addr, msf->imsf_slist, | |
2059 | msf->imsf_numsrc * sizeof(msf->imsf_slist[0])); | |
2060 | err = ip_mc_add_src(in_dev, &msf->imsf_multiaddr, | |
2061 | msf->imsf_fmode, newpsl->sl_count, newpsl->sl_addr, 0); | |
2062 | if (err) { | |
2063 | sock_kfree_s(sk, newpsl, IP_SFLSIZE(newpsl->sl_max)); | |
2064 | goto done; | |
2065 | } | |
8713dbf0 | 2066 | } else { |
1da177e4 | 2067 | newpsl = NULL; |
8713dbf0 YZ |
2068 | (void) ip_mc_add_src(in_dev, &msf->imsf_multiaddr, |
2069 | msf->imsf_fmode, 0, NULL, 0); | |
2070 | } | |
1da177e4 LT |
2071 | psl = pmc->sflist; |
2072 | if (psl) { | |
2073 | (void) ip_mc_del_src(in_dev, &msf->imsf_multiaddr, pmc->sfmode, | |
2074 | psl->sl_count, psl->sl_addr, 0); | |
2075 | sock_kfree_s(sk, psl, IP_SFLSIZE(psl->sl_max)); | |
2076 | } else | |
2077 | (void) ip_mc_del_src(in_dev, &msf->imsf_multiaddr, pmc->sfmode, | |
2078 | 0, NULL, 0); | |
2079 | pmc->sflist = newpsl; | |
2080 | pmc->sfmode = msf->imsf_fmode; | |
917f2f10 | 2081 | err = 0; |
1da177e4 | 2082 | done: |
6756ae4b | 2083 | rtnl_unlock(); |
9951f036 DS |
2084 | if (leavegroup) |
2085 | err = ip_mc_leave_group(sk, &imr); | |
1da177e4 LT |
2086 | return err; |
2087 | } | |
2088 | ||
2089 | int ip_mc_msfget(struct sock *sk, struct ip_msfilter *msf, | |
2090 | struct ip_msfilter __user *optval, int __user *optlen) | |
2091 | { | |
2092 | int err, len, count, copycount; | |
2093 | struct ip_mreqn imr; | |
63007727 | 2094 | __be32 addr = msf->imsf_multiaddr; |
1da177e4 LT |
2095 | struct ip_mc_socklist *pmc; |
2096 | struct in_device *in_dev; | |
2097 | struct inet_sock *inet = inet_sk(sk); | |
2098 | struct ip_sf_socklist *psl; | |
2099 | ||
f97c1e0c | 2100 | if (!ipv4_is_multicast(addr)) |
1da177e4 LT |
2101 | return -EINVAL; |
2102 | ||
3b1e0a65 | 2103 | if (sock_net(sk) != &init_net) |
2430aa85 DL |
2104 | return -EPROTONOSUPPORT; |
2105 | ||
6756ae4b | 2106 | rtnl_lock(); |
1da177e4 LT |
2107 | |
2108 | imr.imr_multiaddr.s_addr = msf->imsf_multiaddr; | |
2109 | imr.imr_address.s_addr = msf->imsf_interface; | |
2110 | imr.imr_ifindex = 0; | |
2111 | in_dev = ip_mc_find_dev(&imr); | |
2112 | ||
2113 | if (!in_dev) { | |
2114 | err = -ENODEV; | |
2115 | goto done; | |
2116 | } | |
2117 | err = -EADDRNOTAVAIL; | |
2118 | ||
2119 | for (pmc=inet->mc_list; pmc; pmc=pmc->next) { | |
2120 | if (pmc->multi.imr_multiaddr.s_addr == msf->imsf_multiaddr && | |
2121 | pmc->multi.imr_ifindex == imr.imr_ifindex) | |
2122 | break; | |
2123 | } | |
2124 | if (!pmc) /* must have a prior join */ | |
2125 | goto done; | |
2126 | msf->imsf_fmode = pmc->sfmode; | |
2127 | psl = pmc->sflist; | |
6756ae4b | 2128 | rtnl_unlock(); |
1da177e4 LT |
2129 | if (!psl) { |
2130 | len = 0; | |
2131 | count = 0; | |
2132 | } else { | |
2133 | count = psl->sl_count; | |
2134 | } | |
2135 | copycount = count < msf->imsf_numsrc ? count : msf->imsf_numsrc; | |
2136 | len = copycount * sizeof(psl->sl_addr[0]); | |
2137 | msf->imsf_numsrc = count; | |
2138 | if (put_user(IP_MSFILTER_SIZE(copycount), optlen) || | |
2139 | copy_to_user(optval, msf, IP_MSFILTER_SIZE(0))) { | |
2140 | return -EFAULT; | |
2141 | } | |
2142 | if (len && | |
2143 | copy_to_user(&optval->imsf_slist[0], psl->sl_addr, len)) | |
2144 | return -EFAULT; | |
2145 | return 0; | |
2146 | done: | |
6756ae4b | 2147 | rtnl_unlock(); |
1da177e4 LT |
2148 | return err; |
2149 | } | |
2150 | ||
2151 | int ip_mc_gsfget(struct sock *sk, struct group_filter *gsf, | |
2152 | struct group_filter __user *optval, int __user *optlen) | |
2153 | { | |
2154 | int err, i, count, copycount; | |
2155 | struct sockaddr_in *psin; | |
63007727 | 2156 | __be32 addr; |
1da177e4 LT |
2157 | struct ip_mc_socklist *pmc; |
2158 | struct inet_sock *inet = inet_sk(sk); | |
2159 | struct ip_sf_socklist *psl; | |
2160 | ||
2161 | psin = (struct sockaddr_in *)&gsf->gf_group; | |
2162 | if (psin->sin_family != AF_INET) | |
2163 | return -EINVAL; | |
2164 | addr = psin->sin_addr.s_addr; | |
f97c1e0c | 2165 | if (!ipv4_is_multicast(addr)) |
1da177e4 LT |
2166 | return -EINVAL; |
2167 | ||
3b1e0a65 | 2168 | if (sock_net(sk) != &init_net) |
2430aa85 DL |
2169 | return -EPROTONOSUPPORT; |
2170 | ||
6756ae4b | 2171 | rtnl_lock(); |
1da177e4 LT |
2172 | |
2173 | err = -EADDRNOTAVAIL; | |
2174 | ||
2175 | for (pmc=inet->mc_list; pmc; pmc=pmc->next) { | |
2176 | if (pmc->multi.imr_multiaddr.s_addr == addr && | |
2177 | pmc->multi.imr_ifindex == gsf->gf_interface) | |
2178 | break; | |
2179 | } | |
2180 | if (!pmc) /* must have a prior join */ | |
2181 | goto done; | |
2182 | gsf->gf_fmode = pmc->sfmode; | |
2183 | psl = pmc->sflist; | |
6756ae4b | 2184 | rtnl_unlock(); |
1da177e4 LT |
2185 | count = psl ? psl->sl_count : 0; |
2186 | copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc; | |
2187 | gsf->gf_numsrc = count; | |
2188 | if (put_user(GROUP_FILTER_SIZE(copycount), optlen) || | |
2189 | copy_to_user(optval, gsf, GROUP_FILTER_SIZE(0))) { | |
2190 | return -EFAULT; | |
2191 | } | |
2192 | for (i=0; i<copycount; i++) { | |
1da177e4 LT |
2193 | struct sockaddr_storage ss; |
2194 | ||
2195 | psin = (struct sockaddr_in *)&ss; | |
2196 | memset(&ss, 0, sizeof(ss)); | |
2197 | psin->sin_family = AF_INET; | |
2198 | psin->sin_addr.s_addr = psl->sl_addr[i]; | |
2199 | if (copy_to_user(&optval->gf_slist[i], &ss, sizeof(ss))) | |
2200 | return -EFAULT; | |
2201 | } | |
2202 | return 0; | |
2203 | done: | |
6756ae4b | 2204 | rtnl_unlock(); |
1da177e4 LT |
2205 | return err; |
2206 | } | |
2207 | ||
2208 | /* | |
2209 | * check if a multicast source filter allows delivery for a given <src,dst,intf> | |
2210 | */ | |
c0cda068 | 2211 | int ip_mc_sf_allow(struct sock *sk, __be32 loc_addr, __be32 rmt_addr, int dif) |
1da177e4 LT |
2212 | { |
2213 | struct inet_sock *inet = inet_sk(sk); | |
2214 | struct ip_mc_socklist *pmc; | |
2215 | struct ip_sf_socklist *psl; | |
2216 | int i; | |
2217 | ||
f97c1e0c | 2218 | if (!ipv4_is_multicast(loc_addr)) |
1da177e4 LT |
2219 | return 1; |
2220 | ||
2221 | for (pmc=inet->mc_list; pmc; pmc=pmc->next) { | |
2222 | if (pmc->multi.imr_multiaddr.s_addr == loc_addr && | |
2223 | pmc->multi.imr_ifindex == dif) | |
2224 | break; | |
2225 | } | |
2226 | if (!pmc) | |
2227 | return 1; | |
2228 | psl = pmc->sflist; | |
2229 | if (!psl) | |
2230 | return pmc->sfmode == MCAST_EXCLUDE; | |
2231 | ||
2232 | for (i=0; i<psl->sl_count; i++) { | |
2233 | if (psl->sl_addr[i] == rmt_addr) | |
2234 | break; | |
2235 | } | |
2236 | if (pmc->sfmode == MCAST_INCLUDE && i >= psl->sl_count) | |
2237 | return 0; | |
2238 | if (pmc->sfmode == MCAST_EXCLUDE && i < psl->sl_count) | |
2239 | return 0; | |
2240 | return 1; | |
2241 | } | |
2242 | ||
2243 | /* | |
2244 | * A socket is closing. | |
2245 | */ | |
2246 | ||
2247 | void ip_mc_drop_socket(struct sock *sk) | |
2248 | { | |
2249 | struct inet_sock *inet = inet_sk(sk); | |
2250 | struct ip_mc_socklist *iml; | |
2251 | ||
2252 | if (inet->mc_list == NULL) | |
2253 | return; | |
2254 | ||
3b1e0a65 | 2255 | if (sock_net(sk) != &init_net) |
2430aa85 DL |
2256 | return; |
2257 | ||
1da177e4 LT |
2258 | rtnl_lock(); |
2259 | while ((iml = inet->mc_list) != NULL) { | |
2260 | struct in_device *in_dev; | |
2261 | inet->mc_list = iml->next; | |
2262 | ||
7fee0ca2 | 2263 | in_dev = inetdev_by_index(&init_net, iml->multi.imr_ifindex); |
bb699cbc MR |
2264 | (void) ip_mc_leave_src(sk, iml, in_dev); |
2265 | if (in_dev != NULL) { | |
1da177e4 LT |
2266 | ip_mc_dec_group(in_dev, iml->multi.imr_multiaddr.s_addr); |
2267 | in_dev_put(in_dev); | |
2268 | } | |
2269 | sock_kfree_s(sk, iml, sizeof(*iml)); | |
1da177e4 LT |
2270 | } |
2271 | rtnl_unlock(); | |
2272 | } | |
2273 | ||
a60c4923 | 2274 | int ip_check_mc(struct in_device *in_dev, __be32 mc_addr, __be32 src_addr, u16 proto) |
1da177e4 LT |
2275 | { |
2276 | struct ip_mc_list *im; | |
2277 | struct ip_sf_list *psf; | |
2278 | int rv = 0; | |
2279 | ||
2280 | read_lock(&in_dev->mc_list_lock); | |
2281 | for (im=in_dev->mc_list; im; im=im->next) { | |
2282 | if (im->multiaddr == mc_addr) | |
2283 | break; | |
2284 | } | |
2285 | if (im && proto == IPPROTO_IGMP) { | |
2286 | rv = 1; | |
2287 | } else if (im) { | |
2288 | if (src_addr) { | |
2289 | for (psf=im->sources; psf; psf=psf->sf_next) { | |
2290 | if (psf->sf_inaddr == src_addr) | |
2291 | break; | |
2292 | } | |
2293 | if (psf) | |
2294 | rv = psf->sf_count[MCAST_INCLUDE] || | |
2295 | psf->sf_count[MCAST_EXCLUDE] != | |
2296 | im->sfcount[MCAST_EXCLUDE]; | |
2297 | else | |
2298 | rv = im->sfcount[MCAST_EXCLUDE] != 0; | |
2299 | } else | |
2300 | rv = 1; /* unspecified source; tentatively allow */ | |
2301 | } | |
2302 | read_unlock(&in_dev->mc_list_lock); | |
2303 | return rv; | |
2304 | } | |
2305 | ||
2306 | #if defined(CONFIG_PROC_FS) | |
2307 | struct igmp_mc_iter_state { | |
2308 | struct net_device *dev; | |
2309 | struct in_device *in_dev; | |
2310 | }; | |
2311 | ||
2312 | #define igmp_mc_seq_private(seq) ((struct igmp_mc_iter_state *)(seq)->private) | |
2313 | ||
2314 | static inline struct ip_mc_list *igmp_mc_get_first(struct seq_file *seq) | |
2315 | { | |
2316 | struct ip_mc_list *im = NULL; | |
2317 | struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq); | |
2318 | ||
7562f876 | 2319 | state->in_dev = NULL; |
881d966b | 2320 | for_each_netdev(&init_net, state->dev) { |
1da177e4 LT |
2321 | struct in_device *in_dev; |
2322 | in_dev = in_dev_get(state->dev); | |
2323 | if (!in_dev) | |
2324 | continue; | |
2325 | read_lock(&in_dev->mc_list_lock); | |
2326 | im = in_dev->mc_list; | |
2327 | if (im) { | |
2328 | state->in_dev = in_dev; | |
2329 | break; | |
2330 | } | |
2331 | read_unlock(&in_dev->mc_list_lock); | |
2332 | in_dev_put(in_dev); | |
2333 | } | |
2334 | return im; | |
2335 | } | |
2336 | ||
2337 | static struct ip_mc_list *igmp_mc_get_next(struct seq_file *seq, struct ip_mc_list *im) | |
2338 | { | |
2339 | struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq); | |
2340 | im = im->next; | |
2341 | while (!im) { | |
2342 | if (likely(state->in_dev != NULL)) { | |
2343 | read_unlock(&state->in_dev->mc_list_lock); | |
2344 | in_dev_put(state->in_dev); | |
2345 | } | |
7562f876 | 2346 | state->dev = next_net_device(state->dev); |
1da177e4 LT |
2347 | if (!state->dev) { |
2348 | state->in_dev = NULL; | |
2349 | break; | |
2350 | } | |
2351 | state->in_dev = in_dev_get(state->dev); | |
2352 | if (!state->in_dev) | |
2353 | continue; | |
2354 | read_lock(&state->in_dev->mc_list_lock); | |
2355 | im = state->in_dev->mc_list; | |
2356 | } | |
2357 | return im; | |
2358 | } | |
2359 | ||
2360 | static struct ip_mc_list *igmp_mc_get_idx(struct seq_file *seq, loff_t pos) | |
2361 | { | |
2362 | struct ip_mc_list *im = igmp_mc_get_first(seq); | |
2363 | if (im) | |
2364 | while (pos && (im = igmp_mc_get_next(seq, im)) != NULL) | |
2365 | --pos; | |
2366 | return pos ? NULL : im; | |
2367 | } | |
2368 | ||
2369 | static void *igmp_mc_seq_start(struct seq_file *seq, loff_t *pos) | |
dd329bfa | 2370 | __acquires(dev_base_lock) |
1da177e4 LT |
2371 | { |
2372 | read_lock(&dev_base_lock); | |
2373 | return *pos ? igmp_mc_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
2374 | } | |
2375 | ||
2376 | static void *igmp_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2377 | { | |
2378 | struct ip_mc_list *im; | |
2379 | if (v == SEQ_START_TOKEN) | |
2380 | im = igmp_mc_get_first(seq); | |
2381 | else | |
2382 | im = igmp_mc_get_next(seq, v); | |
2383 | ++*pos; | |
2384 | return im; | |
2385 | } | |
2386 | ||
2387 | static void igmp_mc_seq_stop(struct seq_file *seq, void *v) | |
dd329bfa | 2388 | __releases(dev_base_lock) |
1da177e4 LT |
2389 | { |
2390 | struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq); | |
2391 | if (likely(state->in_dev != NULL)) { | |
2392 | read_unlock(&state->in_dev->mc_list_lock); | |
2393 | in_dev_put(state->in_dev); | |
2394 | state->in_dev = NULL; | |
2395 | } | |
2396 | state->dev = NULL; | |
2397 | read_unlock(&dev_base_lock); | |
2398 | } | |
2399 | ||
2400 | static int igmp_mc_seq_show(struct seq_file *seq, void *v) | |
2401 | { | |
2402 | if (v == SEQ_START_TOKEN) | |
e905a9ed | 2403 | seq_puts(seq, |
1da177e4 LT |
2404 | "Idx\tDevice : Count Querier\tGroup Users Timer\tReporter\n"); |
2405 | else { | |
2406 | struct ip_mc_list *im = (struct ip_mc_list *)v; | |
2407 | struct igmp_mc_iter_state *state = igmp_mc_seq_private(seq); | |
2408 | char *querier; | |
2409 | #ifdef CONFIG_IP_MULTICAST | |
2410 | querier = IGMP_V1_SEEN(state->in_dev) ? "V1" : | |
2411 | IGMP_V2_SEEN(state->in_dev) ? "V2" : | |
2412 | "V3"; | |
2413 | #else | |
2414 | querier = "NONE"; | |
2415 | #endif | |
2416 | ||
2417 | if (state->in_dev->mc_list == im) { | |
2418 | seq_printf(seq, "%d\t%-10s: %5d %7s\n", | |
2419 | state->dev->ifindex, state->dev->name, state->dev->mc_count, querier); | |
2420 | } | |
2421 | ||
2422 | seq_printf(seq, | |
338fcf98 | 2423 | "\t\t\t\t%08X %5d %d:%08lX\t\t%d\n", |
1da177e4 LT |
2424 | im->multiaddr, im->users, |
2425 | im->tm_running, im->tm_running ? | |
2426 | jiffies_to_clock_t(im->timer.expires-jiffies) : 0, | |
2427 | im->reporter); | |
2428 | } | |
2429 | return 0; | |
2430 | } | |
2431 | ||
f690808e | 2432 | static const struct seq_operations igmp_mc_seq_ops = { |
1da177e4 LT |
2433 | .start = igmp_mc_seq_start, |
2434 | .next = igmp_mc_seq_next, | |
2435 | .stop = igmp_mc_seq_stop, | |
2436 | .show = igmp_mc_seq_show, | |
2437 | }; | |
2438 | ||
2439 | static int igmp_mc_seq_open(struct inode *inode, struct file *file) | |
2440 | { | |
cf7732e4 PE |
2441 | return seq_open_private(file, &igmp_mc_seq_ops, |
2442 | sizeof(struct igmp_mc_iter_state)); | |
1da177e4 LT |
2443 | } |
2444 | ||
9a32144e | 2445 | static const struct file_operations igmp_mc_seq_fops = { |
1da177e4 LT |
2446 | .owner = THIS_MODULE, |
2447 | .open = igmp_mc_seq_open, | |
2448 | .read = seq_read, | |
2449 | .llseek = seq_lseek, | |
2450 | .release = seq_release_private, | |
2451 | }; | |
2452 | ||
2453 | struct igmp_mcf_iter_state { | |
2454 | struct net_device *dev; | |
2455 | struct in_device *idev; | |
2456 | struct ip_mc_list *im; | |
2457 | }; | |
2458 | ||
2459 | #define igmp_mcf_seq_private(seq) ((struct igmp_mcf_iter_state *)(seq)->private) | |
2460 | ||
2461 | static inline struct ip_sf_list *igmp_mcf_get_first(struct seq_file *seq) | |
2462 | { | |
2463 | struct ip_sf_list *psf = NULL; | |
2464 | struct ip_mc_list *im = NULL; | |
2465 | struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq); | |
2466 | ||
7562f876 PE |
2467 | state->idev = NULL; |
2468 | state->im = NULL; | |
881d966b | 2469 | for_each_netdev(&init_net, state->dev) { |
1da177e4 LT |
2470 | struct in_device *idev; |
2471 | idev = in_dev_get(state->dev); | |
2472 | if (unlikely(idev == NULL)) | |
2473 | continue; | |
2474 | read_lock(&idev->mc_list_lock); | |
2475 | im = idev->mc_list; | |
2476 | if (likely(im != NULL)) { | |
2477 | spin_lock_bh(&im->lock); | |
2478 | psf = im->sources; | |
2479 | if (likely(psf != NULL)) { | |
2480 | state->im = im; | |
2481 | state->idev = idev; | |
2482 | break; | |
2483 | } | |
2484 | spin_unlock_bh(&im->lock); | |
2485 | } | |
2486 | read_unlock(&idev->mc_list_lock); | |
2487 | in_dev_put(idev); | |
2488 | } | |
2489 | return psf; | |
2490 | } | |
2491 | ||
2492 | static struct ip_sf_list *igmp_mcf_get_next(struct seq_file *seq, struct ip_sf_list *psf) | |
2493 | { | |
2494 | struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq); | |
2495 | ||
2496 | psf = psf->sf_next; | |
2497 | while (!psf) { | |
2498 | spin_unlock_bh(&state->im->lock); | |
2499 | state->im = state->im->next; | |
2500 | while (!state->im) { | |
2501 | if (likely(state->idev != NULL)) { | |
2502 | read_unlock(&state->idev->mc_list_lock); | |
2503 | in_dev_put(state->idev); | |
2504 | } | |
7562f876 | 2505 | state->dev = next_net_device(state->dev); |
1da177e4 LT |
2506 | if (!state->dev) { |
2507 | state->idev = NULL; | |
2508 | goto out; | |
2509 | } | |
2510 | state->idev = in_dev_get(state->dev); | |
2511 | if (!state->idev) | |
2512 | continue; | |
2513 | read_lock(&state->idev->mc_list_lock); | |
2514 | state->im = state->idev->mc_list; | |
2515 | } | |
2516 | if (!state->im) | |
2517 | break; | |
2518 | spin_lock_bh(&state->im->lock); | |
2519 | psf = state->im->sources; | |
2520 | } | |
2521 | out: | |
2522 | return psf; | |
2523 | } | |
2524 | ||
2525 | static struct ip_sf_list *igmp_mcf_get_idx(struct seq_file *seq, loff_t pos) | |
2526 | { | |
2527 | struct ip_sf_list *psf = igmp_mcf_get_first(seq); | |
2528 | if (psf) | |
2529 | while (pos && (psf = igmp_mcf_get_next(seq, psf)) != NULL) | |
2530 | --pos; | |
2531 | return pos ? NULL : psf; | |
2532 | } | |
2533 | ||
2534 | static void *igmp_mcf_seq_start(struct seq_file *seq, loff_t *pos) | |
2535 | { | |
2536 | read_lock(&dev_base_lock); | |
2537 | return *pos ? igmp_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN; | |
2538 | } | |
2539 | ||
2540 | static void *igmp_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2541 | { | |
2542 | struct ip_sf_list *psf; | |
2543 | if (v == SEQ_START_TOKEN) | |
2544 | psf = igmp_mcf_get_first(seq); | |
2545 | else | |
2546 | psf = igmp_mcf_get_next(seq, v); | |
2547 | ++*pos; | |
2548 | return psf; | |
2549 | } | |
2550 | ||
2551 | static void igmp_mcf_seq_stop(struct seq_file *seq, void *v) | |
2552 | { | |
2553 | struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq); | |
2554 | if (likely(state->im != NULL)) { | |
2555 | spin_unlock_bh(&state->im->lock); | |
2556 | state->im = NULL; | |
2557 | } | |
2558 | if (likely(state->idev != NULL)) { | |
2559 | read_unlock(&state->idev->mc_list_lock); | |
2560 | in_dev_put(state->idev); | |
2561 | state->idev = NULL; | |
2562 | } | |
2563 | state->dev = NULL; | |
2564 | read_unlock(&dev_base_lock); | |
2565 | } | |
2566 | ||
2567 | static int igmp_mcf_seq_show(struct seq_file *seq, void *v) | |
2568 | { | |
2569 | struct ip_sf_list *psf = (struct ip_sf_list *)v; | |
2570 | struct igmp_mcf_iter_state *state = igmp_mcf_seq_private(seq); | |
2571 | ||
2572 | if (v == SEQ_START_TOKEN) { | |
e905a9ed | 2573 | seq_printf(seq, |
1da177e4 LT |
2574 | "%3s %6s " |
2575 | "%10s %10s %6s %6s\n", "Idx", | |
2576 | "Device", "MCA", | |
2577 | "SRC", "INC", "EXC"); | |
2578 | } else { | |
2579 | seq_printf(seq, | |
2580 | "%3d %6.6s 0x%08x " | |
e905a9ed YH |
2581 | "0x%08x %6lu %6lu\n", |
2582 | state->dev->ifindex, state->dev->name, | |
1da177e4 LT |
2583 | ntohl(state->im->multiaddr), |
2584 | ntohl(psf->sf_inaddr), | |
2585 | psf->sf_count[MCAST_INCLUDE], | |
2586 | psf->sf_count[MCAST_EXCLUDE]); | |
2587 | } | |
2588 | return 0; | |
2589 | } | |
2590 | ||
f690808e | 2591 | static const struct seq_operations igmp_mcf_seq_ops = { |
1da177e4 LT |
2592 | .start = igmp_mcf_seq_start, |
2593 | .next = igmp_mcf_seq_next, | |
2594 | .stop = igmp_mcf_seq_stop, | |
2595 | .show = igmp_mcf_seq_show, | |
2596 | }; | |
2597 | ||
2598 | static int igmp_mcf_seq_open(struct inode *inode, struct file *file) | |
2599 | { | |
cf7732e4 PE |
2600 | return seq_open_private(file, &igmp_mcf_seq_ops, |
2601 | sizeof(struct igmp_mcf_iter_state)); | |
1da177e4 LT |
2602 | } |
2603 | ||
9a32144e | 2604 | static const struct file_operations igmp_mcf_seq_fops = { |
1da177e4 LT |
2605 | .owner = THIS_MODULE, |
2606 | .open = igmp_mcf_seq_open, | |
2607 | .read = seq_read, | |
2608 | .llseek = seq_lseek, | |
2609 | .release = seq_release_private, | |
2610 | }; | |
2611 | ||
2612 | int __init igmp_mc_proc_init(void) | |
2613 | { | |
457c4cbc EB |
2614 | proc_net_fops_create(&init_net, "igmp", S_IRUGO, &igmp_mc_seq_fops); |
2615 | proc_net_fops_create(&init_net, "mcfilter", S_IRUGO, &igmp_mcf_seq_fops); | |
1da177e4 LT |
2616 | return 0; |
2617 | } | |
2618 | #endif | |
2619 | ||
2620 | EXPORT_SYMBOL(ip_mc_dec_group); | |
2621 | EXPORT_SYMBOL(ip_mc_inc_group); | |
2622 | EXPORT_SYMBOL(ip_mc_join_group); | |
a816c7c7 | 2623 | EXPORT_SYMBOL(ip_mc_rejoin_group); |