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Commit | Line | Data |
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12e41d03 | 1 | /* |
896014f4 DL |
2 | * PIM for Quagga |
3 | * Copyright (C) 2008 Everton da Silva Marques | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; see the file COPYING; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
12e41d03 DL |
19 | |
20 | #include <zebra.h> | |
21 | #include "log.h" | |
22 | #include "memory.h" | |
744d91b3 | 23 | #include "if.h" |
3613d898 | 24 | #include "lib_errors.h" |
12e41d03 DL |
25 | |
26 | #include "pimd.h" | |
27 | #include "pim_iface.h" | |
28 | #include "pim_igmp.h" | |
29 | #include "pim_igmpv3.h" | |
30 | #include "pim_str.h" | |
31 | #include "pim_util.h" | |
32 | #include "pim_time.h" | |
33 | #include "pim_zebra.h" | |
34 | #include "pim_oil.h" | |
f6053ff2 | 35 | #include "pim_ssm.h" |
12e41d03 | 36 | |
a16db099 SG |
37 | static void group_retransmit_timer_on(struct gm_group *group); |
38 | static long igmp_group_timer_remain_msec(struct gm_group *group); | |
51700107 | 39 | static long igmp_source_timer_remain_msec(struct gm_source *source); |
a16db099 SG |
40 | static void group_query_send(struct gm_group *group); |
41 | static void source_query_send_by_flag(struct gm_group *group, | |
12e41d03 DL |
42 | int num_sources_tosend); |
43 | ||
d62a17ae | 44 | static void on_trace(const char *label, struct interface *ifp, |
45 | struct in_addr from, struct in_addr group_addr, | |
12e41d03 DL |
46 | int num_sources, struct in_addr *sources) |
47 | { | |
d62a17ae | 48 | if (PIM_DEBUG_IGMP_TRACE) { |
49 | char from_str[INET_ADDRSTRLEN]; | |
50 | char group_str[INET_ADDRSTRLEN]; | |
12e41d03 | 51 | |
d62a17ae | 52 | pim_inet4_dump("<from?>", from, from_str, sizeof(from_str)); |
53 | pim_inet4_dump("<group?>", group_addr, group_str, | |
54 | sizeof(group_str)); | |
12e41d03 | 55 | |
d62a17ae | 56 | zlog_debug("%s: from %s on %s: group=%s sources=%d", label, |
57 | from_str, ifp->name, group_str, num_sources); | |
58 | } | |
12e41d03 DL |
59 | } |
60 | ||
a16db099 | 61 | static inline long igmp_gmi_msec(struct gm_group *group) |
dda4d23c DL |
62 | { |
63 | struct pim_interface *pim_ifp = group->interface->info; | |
c5f76fad | 64 | struct gm_sock *igmp; |
dda4d23c DL |
65 | struct listnode *sock_node; |
66 | ||
67 | long qrv = 0, qqi = 0; | |
68 | ||
18adcff1 | 69 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->gm_socket_list, sock_node, igmp)) { |
dda4d23c DL |
70 | qrv = MAX(qrv, igmp->querier_robustness_variable); |
71 | qqi = MAX(qqi, igmp->querier_query_interval); | |
72 | } | |
73 | return PIM_IGMP_GMI_MSEC(qrv, qqi, | |
18adcff1 | 74 | pim_ifp->gm_query_max_response_time_dsec); |
dda4d23c DL |
75 | } |
76 | ||
a16db099 | 77 | void igmp_group_reset_gmi(struct gm_group *group) |
12e41d03 | 78 | { |
d62a17ae | 79 | long group_membership_interval_msec; |
d62a17ae | 80 | struct interface *ifp; |
81 | ||
dda4d23c | 82 | ifp = group->interface; |
d62a17ae | 83 | |
84 | /* | |
85 | RFC 3376: 8.4. Group Membership Interval | |
86 | ||
87 | The Group Membership Interval is the amount of time that must pass | |
88 | before a multicast router decides there are no more members of a | |
89 | group or a particular source on a network. | |
90 | ||
91 | This value MUST be ((the Robustness Variable) times (the Query | |
92 | Interval)) plus (one Query Response Interval). | |
93 | ||
94 | group_membership_interval_msec = querier_robustness_variable * | |
95 | (1000 * querier_query_interval) + | |
96 | 100 * query_response_interval_dsec; | |
97 | */ | |
dda4d23c | 98 | group_membership_interval_msec = igmp_gmi_msec(group); |
d62a17ae | 99 | |
100 | if (PIM_DEBUG_IGMP_TRACE) { | |
101 | char group_str[INET_ADDRSTRLEN]; | |
102 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
103 | sizeof(group_str)); | |
104 | zlog_debug( | |
105 | "Resetting group %s timer to GMI=%ld.%03ld sec on %s", | |
106 | group_str, group_membership_interval_msec / 1000, | |
107 | group_membership_interval_msec % 1000, ifp->name); | |
108 | } | |
109 | ||
110 | /* | |
111 | RFC 3376: 6.2.2. Definition of Group Timers | |
112 | ||
113 | The group timer is only used when a group is in EXCLUDE mode and | |
114 | it represents the time for the *filter-mode* of the group to | |
115 | expire and switch to INCLUDE mode. | |
116 | */ | |
df5dfb77 | 117 | assert(group->group_filtermode_isexcl); |
d62a17ae | 118 | |
119 | igmp_group_timer_on(group, group_membership_interval_msec, ifp->name); | |
12e41d03 DL |
120 | } |
121 | ||
cc9f21da | 122 | static void igmp_source_timer(struct thread *t) |
12e41d03 | 123 | { |
51700107 | 124 | struct gm_source *source; |
a16db099 | 125 | struct gm_group *group; |
d62a17ae | 126 | |
127 | source = THREAD_ARG(t); | |
128 | ||
129 | group = source->source_group; | |
130 | ||
131 | if (PIM_DEBUG_IGMP_TRACE) { | |
132 | char group_str[INET_ADDRSTRLEN]; | |
133 | char source_str[INET_ADDRSTRLEN]; | |
134 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
135 | sizeof(group_str)); | |
136 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
137 | sizeof(source_str)); | |
138 | zlog_debug( | |
139 | "%s: Source timer expired for group %s source %s on %s", | |
15569c58 | 140 | __func__, group_str, source_str, |
dda4d23c | 141 | group->interface->name); |
d62a17ae | 142 | } |
143 | ||
144 | /* | |
145 | RFC 3376: 6.3. IGMPv3 Source-Specific Forwarding Rules | |
146 | ||
147 | Group | |
148 | Filter-Mode Source Timer Value Action | |
149 | ----------- ------------------ ------ | |
150 | INCLUDE TIMER == 0 Suggest to stop forwarding | |
151 | traffic from source and | |
152 | remove source record. If | |
153 | there are no more source | |
154 | records for the group, delete | |
155 | group record. | |
156 | ||
157 | EXCLUDE TIMER == 0 Suggest to not forward | |
158 | traffic from source | |
159 | (DO NOT remove record) | |
160 | ||
161 | Source timer switched from (T > 0) to (T == 0): disable forwarding. | |
162 | */ | |
163 | ||
164 | if (group->group_filtermode_isexcl) { | |
165 | /* EXCLUDE mode */ | |
166 | ||
167 | igmp_source_forward_stop(source); | |
168 | } else { | |
169 | /* INCLUDE mode */ | |
170 | ||
171 | /* igmp_source_delete() will stop forwarding source */ | |
172 | igmp_source_delete(source); | |
173 | ||
174 | /* | |
175 | If there are no more source records for the group, delete | |
176 | group | |
177 | record. | |
178 | */ | |
179 | if (!listcount(group->group_source_list)) { | |
180 | igmp_group_delete_empty_include(group); | |
181 | } | |
182 | } | |
12e41d03 DL |
183 | } |
184 | ||
a16db099 | 185 | static void source_timer_off(struct gm_group *group, struct gm_source *source) |
12e41d03 | 186 | { |
d62a17ae | 187 | if (!source->t_source_timer) |
188 | return; | |
189 | ||
190 | if (PIM_DEBUG_IGMP_TRACE) { | |
191 | char group_str[INET_ADDRSTRLEN]; | |
192 | char source_str[INET_ADDRSTRLEN]; | |
193 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
194 | sizeof(group_str)); | |
195 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
196 | sizeof(source_str)); | |
197 | zlog_debug( | |
198 | "Cancelling TIMER event for group %s source %s on %s", | |
a1a4295a | 199 | group_str, source_str, group->interface->name); |
d62a17ae | 200 | } |
201 | ||
202 | THREAD_OFF(source->t_source_timer); | |
12e41d03 DL |
203 | } |
204 | ||
a16db099 | 205 | static void igmp_source_timer_on(struct gm_group *group, |
51700107 | 206 | struct gm_source *source, long interval_msec) |
12e41d03 | 207 | { |
d62a17ae | 208 | source_timer_off(group, source); |
dda4d23c | 209 | struct pim_interface *pim_ifp = group->interface->info; |
d62a17ae | 210 | |
211 | if (PIM_DEBUG_IGMP_EVENTS) { | |
212 | char group_str[INET_ADDRSTRLEN]; | |
213 | char source_str[INET_ADDRSTRLEN]; | |
214 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
215 | sizeof(group_str)); | |
216 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
217 | sizeof(source_str)); | |
218 | zlog_debug( | |
219 | "Scheduling %ld.%03ld sec TIMER event for group %s source %s on %s", | |
220 | interval_msec / 1000, interval_msec % 1000, group_str, | |
dda4d23c | 221 | source_str, group->interface->name); |
d62a17ae | 222 | } |
223 | ||
36417fcc DS |
224 | thread_add_timer_msec(router->master, igmp_source_timer, source, |
225 | interval_msec, &source->t_source_timer); | |
d62a17ae | 226 | |
227 | /* | |
228 | RFC 3376: 6.3. IGMPv3 Source-Specific Forwarding Rules | |
229 | ||
230 | Source timer switched from (T == 0) to (T > 0): enable forwarding. | |
231 | */ | |
e52e3223 | 232 | igmp_source_forward_start(pim_ifp->pim, source); |
12e41d03 DL |
233 | } |
234 | ||
a16db099 | 235 | void igmp_source_reset_gmi(struct gm_group *group, struct gm_source *source) |
12e41d03 | 236 | { |
d62a17ae | 237 | long group_membership_interval_msec; |
d62a17ae | 238 | struct interface *ifp; |
239 | ||
dda4d23c | 240 | ifp = group->interface; |
d62a17ae | 241 | |
dda4d23c | 242 | group_membership_interval_msec = igmp_gmi_msec(group); |
d62a17ae | 243 | |
244 | if (PIM_DEBUG_IGMP_TRACE) { | |
245 | char group_str[INET_ADDRSTRLEN]; | |
246 | char source_str[INET_ADDRSTRLEN]; | |
247 | ||
248 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
249 | sizeof(group_str)); | |
250 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
251 | sizeof(source_str)); | |
252 | ||
253 | zlog_debug( | |
254 | "Resetting source %s timer to GMI=%ld.%03ld sec for group %s on %s", | |
255 | source_str, group_membership_interval_msec / 1000, | |
256 | group_membership_interval_msec % 1000, group_str, | |
257 | ifp->name); | |
258 | } | |
259 | ||
260 | igmp_source_timer_on(group, source, group_membership_interval_msec); | |
12e41d03 DL |
261 | } |
262 | ||
a16db099 | 263 | static void source_mark_delete_flag(struct gm_group *group) |
12e41d03 | 264 | { |
d62a17ae | 265 | struct listnode *src_node; |
51700107 | 266 | struct gm_source *src; |
12e41d03 | 267 | |
d62a17ae | 268 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { |
269 | IGMP_SOURCE_DO_DELETE(src->source_flags); | |
270 | } | |
12e41d03 DL |
271 | } |
272 | ||
a16db099 | 273 | static void source_mark_send_flag(struct gm_group *group) |
12e41d03 | 274 | { |
d62a17ae | 275 | struct listnode *src_node; |
51700107 | 276 | struct gm_source *src; |
12e41d03 | 277 | |
d62a17ae | 278 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { |
279 | IGMP_SOURCE_DO_SEND(src->source_flags); | |
280 | } | |
12e41d03 DL |
281 | } |
282 | ||
a16db099 | 283 | static int source_mark_send_flag_by_timer(struct gm_group *group) |
12e41d03 | 284 | { |
d62a17ae | 285 | struct listnode *src_node; |
51700107 | 286 | struct gm_source *src; |
d62a17ae | 287 | int num_marked_sources = 0; |
288 | ||
289 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { | |
290 | /* Is source timer running? */ | |
291 | if (src->t_source_timer) { | |
292 | IGMP_SOURCE_DO_SEND(src->source_flags); | |
293 | ++num_marked_sources; | |
294 | } else { | |
295 | IGMP_SOURCE_DONT_SEND(src->source_flags); | |
296 | } | |
297 | } | |
298 | ||
299 | return num_marked_sources; | |
12e41d03 DL |
300 | } |
301 | ||
302 | static void source_clear_send_flag(struct list *source_list) | |
303 | { | |
d62a17ae | 304 | struct listnode *src_node; |
51700107 | 305 | struct gm_source *src; |
12e41d03 | 306 | |
d62a17ae | 307 | for (ALL_LIST_ELEMENTS_RO(source_list, src_node, src)) { |
308 | IGMP_SOURCE_DONT_SEND(src->source_flags); | |
309 | } | |
12e41d03 DL |
310 | } |
311 | ||
312 | /* | |
313 | Any source (*,G) is forwarded only if mode is EXCLUDE {empty} | |
314 | */ | |
a16db099 | 315 | static void group_exclude_fwd_anysrc_ifempty(struct gm_group *group) |
12e41d03 | 316 | { |
dda4d23c | 317 | struct pim_interface *pim_ifp = group->interface->info; |
e52e3223 | 318 | |
df5dfb77 | 319 | assert(group->group_filtermode_isexcl); |
12e41d03 | 320 | |
d62a17ae | 321 | if (listcount(group->group_source_list) < 1) { |
e52e3223 | 322 | igmp_anysource_forward_start(pim_ifp->pim, group); |
d62a17ae | 323 | } |
12e41d03 DL |
324 | } |
325 | ||
51700107 | 326 | void igmp_source_free(struct gm_source *source) |
12e41d03 | 327 | { |
d62a17ae | 328 | /* make sure there is no source timer running */ |
df5dfb77 | 329 | assert(!source->t_source_timer); |
12e41d03 | 330 | |
d62a17ae | 331 | XFREE(MTYPE_PIM_IGMP_GROUP_SOURCE, source); |
12e41d03 DL |
332 | } |
333 | ||
51700107 | 334 | static void source_channel_oil_detach(struct gm_source *source) |
12e41d03 | 335 | { |
d62a17ae | 336 | if (source->source_channel_oil) { |
15569c58 | 337 | pim_channel_oil_del(source->source_channel_oil, __func__); |
d62a17ae | 338 | source->source_channel_oil = NULL; |
339 | } | |
12e41d03 DL |
340 | } |
341 | ||
342 | /* | |
343 | igmp_source_delete: stop fowarding, and delete the source | |
344 | igmp_source_forward_stop: stop fowarding, but keep the source | |
345 | */ | |
51700107 | 346 | void igmp_source_delete(struct gm_source *source) |
12e41d03 | 347 | { |
a16db099 | 348 | struct gm_group *group; |
d62a17ae | 349 | struct in_addr src; |
350 | ||
351 | group = source->source_group; | |
352 | ||
353 | if (PIM_DEBUG_IGMP_TRACE) { | |
354 | char group_str[INET_ADDRSTRLEN]; | |
355 | char source_str[INET_ADDRSTRLEN]; | |
356 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
357 | sizeof(group_str)); | |
358 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
359 | sizeof(source_str)); | |
360 | zlog_debug( | |
dda4d23c | 361 | "Deleting IGMP source %s for group %s from interface %s c_oil ref_count %d", |
a1a4295a | 362 | source_str, group_str, group->interface->name, |
d62a17ae | 363 | source->source_channel_oil |
364 | ? source->source_channel_oil->oil_ref_count | |
365 | : 0); | |
366 | } | |
367 | ||
368 | source_timer_off(group, source); | |
369 | igmp_source_forward_stop(source); | |
370 | ||
371 | /* sanity check that forwarding has been disabled */ | |
372 | if (IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
373 | char group_str[INET_ADDRSTRLEN]; | |
374 | char source_str[INET_ADDRSTRLEN]; | |
375 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
376 | sizeof(group_str)); | |
377 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
378 | sizeof(source_str)); | |
379 | zlog_warn( | |
dda4d23c | 380 | "%s: forwarding=ON(!) IGMP source %s for group %s from interface %s", |
15569c58 | 381 | __func__, source_str, group_str, |
dda4d23c | 382 | group->interface->name); |
d62a17ae | 383 | /* warning only */ |
384 | } | |
385 | ||
386 | source_channel_oil_detach(source); | |
387 | ||
388 | /* | |
389 | notice that listnode_delete() can't be moved | |
390 | into igmp_source_free() because the later is | |
391 | called by list_delete_all_node() | |
392 | */ | |
393 | listnode_delete(group->group_source_list, source); | |
394 | ||
395 | src.s_addr = source->source_addr.s_addr; | |
396 | igmp_source_free(source); | |
397 | ||
398 | /* Group source list is empty and current source is * then | |
399 | *,G group going away so do not trigger start */ | |
400 | if (group->group_filtermode_isexcl | |
401 | && (listcount(group->group_source_list) != 0) | |
402 | && src.s_addr != INADDR_ANY) { | |
403 | group_exclude_fwd_anysrc_ifempty(group); | |
404 | } | |
12e41d03 DL |
405 | } |
406 | ||
407 | static void source_delete_by_flag(struct list *source_list) | |
408 | { | |
d62a17ae | 409 | struct listnode *src_node; |
410 | struct listnode *src_nextnode; | |
51700107 | 411 | struct gm_source *src; |
d62a17ae | 412 | |
413 | for (ALL_LIST_ELEMENTS(source_list, src_node, src_nextnode, src)) | |
414 | if (IGMP_SOURCE_TEST_DELETE(src->source_flags)) | |
415 | igmp_source_delete(src); | |
12e41d03 DL |
416 | } |
417 | ||
418 | void igmp_source_delete_expired(struct list *source_list) | |
419 | { | |
d62a17ae | 420 | struct listnode *src_node; |
421 | struct listnode *src_nextnode; | |
51700107 | 422 | struct gm_source *src; |
d62a17ae | 423 | |
424 | for (ALL_LIST_ELEMENTS(source_list, src_node, src_nextnode, src)) | |
425 | if (!src->t_source_timer) | |
426 | igmp_source_delete(src); | |
12e41d03 DL |
427 | } |
428 | ||
a16db099 SG |
429 | struct gm_source *igmp_find_source_by_addr(struct gm_group *group, |
430 | struct in_addr src_addr) | |
12e41d03 | 431 | { |
d62a17ae | 432 | struct listnode *src_node; |
51700107 | 433 | struct gm_source *src; |
12e41d03 | 434 | |
d62a17ae | 435 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) |
436 | if (src_addr.s_addr == src->source_addr.s_addr) | |
437 | return src; | |
12e41d03 | 438 | |
d62a17ae | 439 | return 0; |
12e41d03 DL |
440 | } |
441 | ||
a16db099 SG |
442 | struct gm_source *igmp_get_source_by_addr(struct gm_group *group, |
443 | struct in_addr src_addr, bool *new) | |
12e41d03 | 444 | { |
51700107 | 445 | struct gm_source *src; |
d62a17ae | 446 | |
5421bf8f DL |
447 | if (new) |
448 | *new = false; | |
449 | ||
450 | src = igmp_find_source_by_addr(group, src_addr); | |
451 | if (src) | |
452 | return src; | |
453 | ||
d62a17ae | 454 | if (PIM_DEBUG_IGMP_TRACE) { |
455 | char group_str[INET_ADDRSTRLEN]; | |
456 | char source_str[INET_ADDRSTRLEN]; | |
457 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
458 | sizeof(group_str)); | |
459 | pim_inet4_dump("<source?>", src_addr, source_str, | |
460 | sizeof(source_str)); | |
461 | zlog_debug( | |
dda4d23c DL |
462 | "Creating new IGMP source %s for group %s on interface %s", |
463 | source_str, group_str, group->interface->name); | |
d62a17ae | 464 | } |
465 | ||
466 | src = XCALLOC(MTYPE_PIM_IGMP_GROUP_SOURCE, sizeof(*src)); | |
d62a17ae | 467 | |
468 | src->t_source_timer = NULL; | |
469 | src->source_group = group; /* back pointer */ | |
470 | src->source_addr = src_addr; | |
471 | src->source_creation = pim_time_monotonic_sec(); | |
472 | src->source_flags = 0; | |
473 | src->source_query_retransmit_count = 0; | |
474 | src->source_channel_oil = NULL; | |
475 | ||
476 | listnode_add(group->group_source_list, src); | |
477 | ||
478 | /* Any source (*,G) is forwarded only if mode is EXCLUDE {empty} */ | |
479 | igmp_anysource_forward_stop(group); | |
d62a17ae | 480 | return src; |
12e41d03 DL |
481 | } |
482 | ||
c5f76fad | 483 | static void allow(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 484 | struct in_addr group_addr, int num_sources, |
485 | struct in_addr *sources) | |
12e41d03 | 486 | { |
51700107 | 487 | struct gm_source *source; |
a16db099 | 488 | struct gm_group *group; |
d62a17ae | 489 | int i; |
490 | ||
fcf5d438 SG |
491 | if (num_sources == 0) { |
492 | /* | |
493 | RFC 3376: 3.1. Socket-State | |
494 | If the requested filter mode is INCLUDE *and* the requested | |
495 | source list is empty, then the entry corresponding to the | |
496 | requested interface and multicast address is deleted if | |
497 | present. If no such entry is present, the request is ignored. | |
498 | So, deleting the group present. | |
499 | */ | |
500 | group = find_group_by_addr(igmp, group_addr); | |
26d0cbbb JAG |
501 | if (!group) { |
502 | return; | |
503 | } | |
504 | if (group->group_filtermode_isexcl) { | |
505 | if (listcount(group->group_source_list) == 1) { | |
506 | struct in_addr star = {.s_addr = INADDR_ANY}; | |
507 | ||
508 | source = igmp_find_source_by_addr(group, star); | |
509 | if (source) | |
dda4d23c | 510 | igmp_source_reset_gmi(group, source); |
26d0cbbb JAG |
511 | } |
512 | } else { | |
fcf5d438 | 513 | igmp_group_delete(group); |
26d0cbbb JAG |
514 | } |
515 | ||
fcf5d438 SG |
516 | return; |
517 | } | |
518 | ||
d62a17ae | 519 | /* non-existant group is created as INCLUDE {empty} */ |
520 | group = igmp_add_group_by_addr(igmp, group_addr); | |
521 | if (!group) { | |
522 | return; | |
523 | } | |
524 | ||
525 | /* scan received sources */ | |
526 | for (i = 0; i < num_sources; ++i) { | |
527 | struct in_addr *src_addr; | |
528 | ||
529 | src_addr = sources + i; | |
530 | ||
5421bf8f DL |
531 | source = igmp_get_source_by_addr(group, *src_addr, NULL); |
532 | if (!source) | |
d62a17ae | 533 | continue; |
d62a17ae | 534 | |
535 | /* | |
536 | RFC 3376: 6.4.1. Reception of Current-State Records | |
537 | ||
538 | When receiving IS_IN reports for groups in EXCLUDE mode is | |
539 | sources should be moved from set with (timers = 0) to set with | |
540 | (timers > 0). | |
541 | ||
542 | igmp_source_reset_gmi() below, resetting the source timers to | |
543 | GMI, accomplishes this. | |
544 | */ | |
dda4d23c | 545 | igmp_source_reset_gmi(group, source); |
d62a17ae | 546 | |
547 | } /* scan received sources */ | |
12e41d03 DL |
548 | } |
549 | ||
c5f76fad | 550 | void igmpv3_report_isin(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 551 | struct in_addr group_addr, int num_sources, |
552 | struct in_addr *sources) | |
12e41d03 | 553 | { |
15569c58 DA |
554 | on_trace(__func__, igmp->interface, from, group_addr, num_sources, |
555 | sources); | |
12e41d03 | 556 | |
d62a17ae | 557 | allow(igmp, from, group_addr, num_sources, sources); |
12e41d03 DL |
558 | } |
559 | ||
a16db099 | 560 | static void isex_excl(struct gm_group *group, int num_sources, |
d62a17ae | 561 | struct in_addr *sources) |
12e41d03 | 562 | { |
51700107 | 563 | struct gm_source *source; |
d62a17ae | 564 | int i; |
565 | ||
566 | /* EXCLUDE mode */ | |
df5dfb77 | 567 | assert(group->group_filtermode_isexcl); |
d62a17ae | 568 | |
569 | /* E.1: set deletion flag for known sources (X,Y) */ | |
570 | source_mark_delete_flag(group); | |
571 | ||
572 | /* scan received sources (A) */ | |
573 | for (i = 0; i < num_sources; ++i) { | |
574 | struct in_addr *src_addr; | |
5421bf8f | 575 | bool new; |
d62a17ae | 576 | |
577 | src_addr = sources + i; | |
578 | ||
579 | /* E.2: lookup reported source from (A) in (X,Y) */ | |
5421bf8f DL |
580 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
581 | if (!source) | |
582 | continue; | |
583 | ||
584 | if (!new) { | |
d62a17ae | 585 | /* E.3: if found, clear deletion flag: (X*A) or (Y*A) */ |
586 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
587 | } else { | |
588 | /* E.4: if not found, create source with timer=GMI: | |
589 | * (A-X-Y) */ | |
df5dfb77 | 590 | assert(!source->t_source_timer); /* timer == 0 */ |
dda4d23c | 591 | igmp_source_reset_gmi(group, source); |
df5dfb77 | 592 | assert(source->t_source_timer); /* (A-X-Y) timer > 0 */ |
d62a17ae | 593 | } |
594 | ||
595 | } /* scan received sources */ | |
596 | ||
597 | /* | |
598 | * If we are in isexcl mode and num_sources == 0 | |
599 | * than that means we have a *,g entry that | |
600 | * needs to be handled | |
601 | */ | |
602 | if (group->group_filtermode_isexcl && num_sources == 0) { | |
603 | struct in_addr star = {.s_addr = INADDR_ANY}; | |
604 | source = igmp_find_source_by_addr(group, star); | |
605 | if (source) { | |
606 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
dda4d23c | 607 | igmp_source_reset_gmi(group, source); |
d62a17ae | 608 | } |
609 | } | |
610 | ||
611 | /* E.5: delete all sources marked with deletion flag: (X-A) and (Y-A) */ | |
612 | source_delete_by_flag(group->group_source_list); | |
12e41d03 DL |
613 | } |
614 | ||
a16db099 | 615 | static void isex_incl(struct gm_group *group, int num_sources, |
d62a17ae | 616 | struct in_addr *sources) |
12e41d03 | 617 | { |
d62a17ae | 618 | int i; |
619 | ||
620 | /* INCLUDE mode */ | |
df5dfb77 | 621 | assert(!group->group_filtermode_isexcl); |
d62a17ae | 622 | |
623 | /* I.1: set deletion flag for known sources (A) */ | |
624 | source_mark_delete_flag(group); | |
625 | ||
626 | /* scan received sources (B) */ | |
627 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 628 | struct gm_source *source; |
d62a17ae | 629 | struct in_addr *src_addr; |
5421bf8f | 630 | bool new; |
d62a17ae | 631 | |
632 | src_addr = sources + i; | |
633 | ||
634 | /* I.2: lookup reported source (B) */ | |
5421bf8f DL |
635 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
636 | if (!source) | |
637 | continue; | |
638 | ||
639 | if (!new) { | |
d62a17ae | 640 | /* I.3: if found, clear deletion flag (A*B) */ |
641 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
642 | } else { | |
643 | /* I.4: if not found, create source with timer=0 (B-A) | |
644 | */ | |
df5dfb77 | 645 | assert(!source->t_source_timer); /* (B-A) timer=0 */ |
d62a17ae | 646 | } |
647 | ||
648 | } /* scan received sources */ | |
649 | ||
650 | /* I.5: delete all sources marked with deletion flag (A-B) */ | |
651 | source_delete_by_flag(group->group_source_list); | |
652 | ||
653 | group->group_filtermode_isexcl = 1; /* boolean=true */ | |
654 | ||
df5dfb77 | 655 | assert(group->group_filtermode_isexcl); |
d62a17ae | 656 | |
657 | group_exclude_fwd_anysrc_ifempty(group); | |
12e41d03 DL |
658 | } |
659 | ||
c5f76fad | 660 | void igmpv3_report_isex(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 661 | struct in_addr group_addr, int num_sources, |
662 | struct in_addr *sources, int from_igmp_v2_report) | |
12e41d03 | 663 | { |
d62a17ae | 664 | struct interface *ifp = igmp->interface; |
a16db099 | 665 | struct gm_group *group; |
d62a17ae | 666 | |
15569c58 | 667 | on_trace(__func__, ifp, from, group_addr, num_sources, sources); |
d62a17ae | 668 | |
b0f525a8 QY |
669 | if (pim_is_group_filtered(ifp->info, &group_addr)) |
670 | return; | |
671 | ||
d62a17ae | 672 | /* non-existant group is created as INCLUDE {empty} */ |
673 | group = igmp_add_group_by_addr(igmp, group_addr); | |
674 | if (!group) { | |
675 | return; | |
676 | } | |
677 | ||
678 | /* So we can display how we learned the group in our show command output | |
679 | */ | |
680 | if (from_igmp_v2_report) | |
681 | group->igmp_version = 2; | |
682 | ||
683 | if (group->group_filtermode_isexcl) { | |
684 | /* EXCLUDE mode */ | |
685 | isex_excl(group, num_sources, sources); | |
686 | } else { | |
687 | /* INCLUDE mode */ | |
688 | isex_incl(group, num_sources, sources); | |
df5dfb77 | 689 | assert(group->group_filtermode_isexcl); |
d62a17ae | 690 | } |
691 | ||
df5dfb77 | 692 | assert(group->group_filtermode_isexcl); |
d62a17ae | 693 | |
694 | igmp_group_reset_gmi(group); | |
12e41d03 DL |
695 | } |
696 | ||
a16db099 | 697 | static void toin_incl(struct gm_group *group, int num_sources, |
d62a17ae | 698 | struct in_addr *sources) |
12e41d03 | 699 | { |
d62a17ae | 700 | int num_sources_tosend = listcount(group->group_source_list); |
701 | int i; | |
702 | ||
703 | /* Set SEND flag for all known sources (A) */ | |
704 | source_mark_send_flag(group); | |
705 | ||
706 | /* Scan received sources (B) */ | |
707 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 708 | struct gm_source *source; |
d62a17ae | 709 | struct in_addr *src_addr; |
5421bf8f | 710 | bool new; |
d62a17ae | 711 | |
712 | src_addr = sources + i; | |
713 | ||
714 | /* Lookup reported source (B) */ | |
5421bf8f DL |
715 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
716 | if (!source) | |
717 | continue; | |
718 | ||
719 | if (!new) { | |
d62a17ae | 720 | /* If found, clear SEND flag (A*B) */ |
721 | IGMP_SOURCE_DONT_SEND(source->source_flags); | |
722 | --num_sources_tosend; | |
d62a17ae | 723 | } |
724 | ||
725 | /* (B)=GMI */ | |
dda4d23c | 726 | igmp_source_reset_gmi(group, source); |
d62a17ae | 727 | } |
728 | ||
729 | /* Send sources marked with SEND flag: Q(G,A-B) */ | |
730 | if (num_sources_tosend > 0) { | |
731 | source_query_send_by_flag(group, num_sources_tosend); | |
732 | } | |
12e41d03 DL |
733 | } |
734 | ||
a16db099 | 735 | static void toin_excl(struct gm_group *group, int num_sources, |
d62a17ae | 736 | struct in_addr *sources) |
12e41d03 | 737 | { |
d62a17ae | 738 | int num_sources_tosend; |
739 | int i; | |
740 | ||
741 | /* Set SEND flag for X (sources with timer > 0) */ | |
742 | num_sources_tosend = source_mark_send_flag_by_timer(group); | |
743 | ||
744 | /* Scan received sources (A) */ | |
745 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 746 | struct gm_source *source; |
d62a17ae | 747 | struct in_addr *src_addr; |
5421bf8f | 748 | bool new; |
d62a17ae | 749 | |
750 | src_addr = sources + i; | |
751 | ||
752 | /* Lookup reported source (A) */ | |
5421bf8f DL |
753 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
754 | if (!source) | |
755 | continue; | |
756 | ||
757 | if (source->t_source_timer) { | |
758 | /* If found and timer running, clear SEND flag | |
759 | * (X*A) */ | |
760 | IGMP_SOURCE_DONT_SEND(source->source_flags); | |
761 | --num_sources_tosend; | |
d62a17ae | 762 | } |
763 | ||
764 | /* (A)=GMI */ | |
dda4d23c | 765 | igmp_source_reset_gmi(group, source); |
d62a17ae | 766 | } |
767 | ||
768 | /* Send sources marked with SEND flag: Q(G,X-A) */ | |
769 | if (num_sources_tosend > 0) { | |
770 | source_query_send_by_flag(group, num_sources_tosend); | |
771 | } | |
772 | ||
773 | /* Send Q(G) */ | |
774 | group_query_send(group); | |
12e41d03 DL |
775 | } |
776 | ||
c5f76fad | 777 | void igmpv3_report_toin(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 778 | struct in_addr group_addr, int num_sources, |
779 | struct in_addr *sources) | |
12e41d03 | 780 | { |
d62a17ae | 781 | struct interface *ifp = igmp->interface; |
a16db099 | 782 | struct gm_group *group; |
d62a17ae | 783 | |
15569c58 | 784 | on_trace(__func__, ifp, from, group_addr, num_sources, sources); |
d62a17ae | 785 | |
786 | /* | |
787 | * If the requested filter mode is INCLUDE *and* the requested source | |
788 | * list is empty, then the entry corresponding to the requested | |
789 | * interface and multicast address is deleted if present. If no such | |
790 | * entry is present, the request is ignored. | |
791 | */ | |
792 | if (num_sources) { | |
793 | /* non-existant group is created as INCLUDE {empty} */ | |
794 | group = igmp_add_group_by_addr(igmp, group_addr); | |
795 | if (!group) { | |
796 | return; | |
797 | } | |
798 | } else { | |
799 | group = find_group_by_addr(igmp, group_addr); | |
800 | if (!group) | |
801 | return; | |
802 | } | |
803 | ||
804 | if (group->group_filtermode_isexcl) { | |
805 | /* EXCLUDE mode */ | |
806 | toin_excl(group, num_sources, sources); | |
807 | } else { | |
808 | /* INCLUDE mode */ | |
809 | toin_incl(group, num_sources, sources); | |
810 | } | |
12e41d03 DL |
811 | } |
812 | ||
a16db099 | 813 | static void toex_incl(struct gm_group *group, int num_sources, |
d62a17ae | 814 | struct in_addr *sources) |
12e41d03 | 815 | { |
d62a17ae | 816 | int num_sources_tosend = 0; |
817 | int i; | |
818 | ||
df5dfb77 | 819 | assert(!group->group_filtermode_isexcl); |
d62a17ae | 820 | |
821 | /* Set DELETE flag for all known sources (A) */ | |
822 | source_mark_delete_flag(group); | |
823 | ||
824 | /* Clear off SEND flag from all known sources (A) */ | |
825 | source_clear_send_flag(group->group_source_list); | |
826 | ||
827 | /* Scan received sources (B) */ | |
828 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 829 | struct gm_source *source; |
d62a17ae | 830 | struct in_addr *src_addr; |
5421bf8f | 831 | bool new; |
d62a17ae | 832 | |
833 | src_addr = sources + i; | |
834 | ||
835 | /* Lookup reported source (B) */ | |
5421bf8f DL |
836 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
837 | if (!new) { | |
d62a17ae | 838 | /* If found, clear deletion flag: (A*B) */ |
839 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
840 | /* and set SEND flag (A*B) */ | |
841 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
842 | ++num_sources_tosend; | |
d62a17ae | 843 | } |
844 | ||
845 | } /* Scan received sources (B) */ | |
846 | ||
847 | group->group_filtermode_isexcl = 1; /* boolean=true */ | |
848 | ||
849 | /* Delete all sources marked with DELETE flag (A-B) */ | |
850 | source_delete_by_flag(group->group_source_list); | |
851 | ||
852 | /* Send sources marked with SEND flag: Q(G,A*B) */ | |
853 | if (num_sources_tosend > 0) { | |
854 | source_query_send_by_flag(group, num_sources_tosend); | |
855 | } | |
856 | ||
df5dfb77 | 857 | assert(group->group_filtermode_isexcl); |
d62a17ae | 858 | |
859 | group_exclude_fwd_anysrc_ifempty(group); | |
12e41d03 DL |
860 | } |
861 | ||
a16db099 | 862 | static void toex_excl(struct gm_group *group, int num_sources, |
d62a17ae | 863 | struct in_addr *sources) |
12e41d03 | 864 | { |
d62a17ae | 865 | int num_sources_tosend = 0; |
866 | int i; | |
867 | ||
868 | /* set DELETE flag for all known sources (X,Y) */ | |
869 | source_mark_delete_flag(group); | |
870 | ||
871 | /* clear off SEND flag from all known sources (X,Y) */ | |
872 | source_clear_send_flag(group->group_source_list); | |
873 | ||
874 | if (num_sources == 0) { | |
51700107 | 875 | struct gm_source *source; |
d62a17ae | 876 | struct in_addr any = {.s_addr = INADDR_ANY}; |
877 | ||
878 | source = igmp_find_source_by_addr(group, any); | |
879 | if (source) | |
880 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
881 | } | |
882 | ||
883 | /* scan received sources (A) */ | |
884 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 885 | struct gm_source *source; |
d62a17ae | 886 | struct in_addr *src_addr; |
5421bf8f | 887 | bool new; |
d62a17ae | 888 | |
889 | src_addr = sources + i; | |
890 | ||
891 | /* lookup reported source (A) in known sources (X,Y) */ | |
5421bf8f DL |
892 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
893 | if (!source) | |
894 | continue; | |
895 | ||
896 | if (!new) { | |
d62a17ae | 897 | /* if found, clear off DELETE flag from reported source |
898 | * (A) */ | |
899 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
900 | } else { | |
901 | /* if not found, create source with Group Timer: | |
902 | * (A-X-Y)=Group Timer */ | |
903 | long group_timer_msec; | |
d62a17ae | 904 | |
df5dfb77 | 905 | assert(!source->t_source_timer); /* timer == 0 */ |
d62a17ae | 906 | group_timer_msec = igmp_group_timer_remain_msec(group); |
907 | igmp_source_timer_on(group, source, group_timer_msec); | |
df5dfb77 | 908 | assert(source->t_source_timer); /* (A-X-Y) timer > 0 */ |
d62a17ae | 909 | |
910 | /* make sure source is created with DELETE flag unset */ | |
df5dfb77 | 911 | assert(!IGMP_SOURCE_TEST_DELETE(source->source_flags)); |
d62a17ae | 912 | } |
913 | ||
914 | /* make sure reported source has DELETE flag unset */ | |
df5dfb77 | 915 | assert(!IGMP_SOURCE_TEST_DELETE(source->source_flags)); |
d62a17ae | 916 | |
917 | if (source->t_source_timer) { | |
918 | /* if source timer>0 mark SEND flag: Q(G,A-Y) */ | |
919 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
920 | ++num_sources_tosend; | |
921 | } | |
922 | ||
923 | } /* scan received sources (A) */ | |
924 | ||
925 | /* | |
926 | delete all sources marked with DELETE flag: | |
927 | Delete (X-A) | |
928 | Delete (Y-A) | |
929 | */ | |
930 | source_delete_by_flag(group->group_source_list); | |
931 | ||
932 | /* send sources marked with SEND flag: Q(G,A-Y) */ | |
933 | if (num_sources_tosend > 0) { | |
934 | source_query_send_by_flag(group, num_sources_tosend); | |
935 | } | |
12e41d03 DL |
936 | } |
937 | ||
c5f76fad | 938 | void igmpv3_report_toex(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 939 | struct in_addr group_addr, int num_sources, |
940 | struct in_addr *sources) | |
12e41d03 | 941 | { |
d62a17ae | 942 | struct interface *ifp = igmp->interface; |
a16db099 | 943 | struct gm_group *group; |
d62a17ae | 944 | |
15569c58 | 945 | on_trace(__func__, ifp, from, group_addr, num_sources, sources); |
d62a17ae | 946 | |
947 | /* non-existant group is created as INCLUDE {empty} */ | |
948 | group = igmp_add_group_by_addr(igmp, group_addr); | |
949 | if (!group) { | |
950 | return; | |
951 | } | |
952 | ||
953 | if (group->group_filtermode_isexcl) { | |
954 | /* EXCLUDE mode */ | |
955 | toex_excl(group, num_sources, sources); | |
956 | } else { | |
957 | /* INCLUDE mode */ | |
958 | toex_incl(group, num_sources, sources); | |
df5dfb77 | 959 | assert(group->group_filtermode_isexcl); |
d62a17ae | 960 | } |
df5dfb77 | 961 | assert(group->group_filtermode_isexcl); |
d62a17ae | 962 | |
963 | /* Group Timer=GMI */ | |
964 | igmp_group_reset_gmi(group); | |
12e41d03 DL |
965 | } |
966 | ||
c5f76fad | 967 | void igmpv3_report_allow(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 968 | struct in_addr group_addr, int num_sources, |
969 | struct in_addr *sources) | |
12e41d03 | 970 | { |
15569c58 DA |
971 | on_trace(__func__, igmp->interface, from, group_addr, num_sources, |
972 | sources); | |
12e41d03 | 973 | |
d62a17ae | 974 | allow(igmp, from, group_addr, num_sources, sources); |
12e41d03 DL |
975 | } |
976 | ||
a16db099 | 977 | static void igmp_send_query_group(struct gm_group *group, char *query_buf, |
dda4d23c DL |
978 | size_t query_buf_size, int num_sources, |
979 | int s_flag) | |
980 | { | |
981 | struct interface *ifp = group->interface; | |
982 | struct pim_interface *pim_ifp = ifp->info; | |
c5f76fad | 983 | struct gm_sock *igmp; |
dda4d23c DL |
984 | struct listnode *sock_node; |
985 | ||
18adcff1 | 986 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->gm_socket_list, sock_node, igmp)) { |
29e58225 | 987 | igmp_send_query( |
278912ea DA |
988 | pim_ifp->igmp_version, group, query_buf, query_buf_size, |
989 | num_sources, group->group_addr, group->group_addr, | |
18adcff1 | 990 | pim_ifp->gm_specific_query_max_response_time_dsec, |
278912ea | 991 | s_flag, igmp); |
dda4d23c DL |
992 | } |
993 | } | |
994 | ||
12e41d03 DL |
995 | /* |
996 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
997 | ||
998 | When transmitting a group specific query, if the group timer is | |
999 | larger than LMQT, the "Suppress Router-Side Processing" bit is set | |
1000 | in the query message. | |
1001 | */ | |
a16db099 | 1002 | static void group_retransmit_group(struct gm_group *group) |
12e41d03 | 1003 | { |
d62a17ae | 1004 | struct pim_interface *pim_ifp; |
1005 | long lmqc; /* Last Member Query Count */ | |
1006 | long lmqi_msec; /* Last Member Query Interval */ | |
1007 | long lmqt_msec; /* Last Member Query Time */ | |
1008 | int s_flag; | |
1009 | int query_buf_size; | |
1010 | ||
dda4d23c | 1011 | pim_ifp = group->interface->info; |
d62a17ae | 1012 | |
29e58225 | 1013 | if (pim_ifp->igmp_version == 3) { |
d62a17ae | 1014 | query_buf_size = PIM_IGMP_BUFSIZE_WRITE; |
1015 | } else { | |
1016 | query_buf_size = IGMP_V12_MSG_SIZE; | |
1017 | } | |
1018 | ||
1019 | char query_buf[query_buf_size]; | |
1020 | ||
18adcff1 SG |
1021 | lmqc = pim_ifp->gm_last_member_query_count; |
1022 | lmqi_msec = 100 * pim_ifp->gm_specific_query_max_response_time_dsec; | |
d62a17ae | 1023 | lmqt_msec = lmqc * lmqi_msec; |
1024 | ||
1025 | /* | |
1026 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
1027 | ||
1028 | When transmitting a group specific query, if the group timer is | |
1029 | larger than LMQT, the "Suppress Router-Side Processing" bit is set | |
1030 | in the query message. | |
1031 | */ | |
1032 | s_flag = igmp_group_timer_remain_msec(group) > lmqt_msec; | |
1033 | ||
1034 | if (PIM_DEBUG_IGMP_TRACE) { | |
1035 | char group_str[INET_ADDRSTRLEN]; | |
1036 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1037 | sizeof(group_str)); | |
1038 | zlog_debug( | |
1039 | "retransmit_group_specific_query: group %s on %s: s_flag=%d count=%d", | |
dda4d23c | 1040 | group_str, group->interface->name, s_flag, |
d62a17ae | 1041 | group->group_specific_query_retransmit_count); |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | RFC3376: 4.1.12. IP Destination Addresses for Queries | |
1046 | ||
1047 | Group-Specific and Group-and-Source-Specific Queries are sent with | |
1048 | an IP destination address equal to the multicast address of | |
1049 | interest. | |
1050 | */ | |
1051 | ||
dda4d23c | 1052 | igmp_send_query_group(group, query_buf, sizeof(query_buf), 0, s_flag); |
12e41d03 DL |
1053 | } |
1054 | ||
1055 | /* | |
1056 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific Queries | |
1057 | ||
1058 | When building a group and source specific query for a group G, two | |
1059 | separate query messages are sent for the group. The first one has | |
1060 | the "Suppress Router-Side Processing" bit set and contains all the | |
1061 | sources with retransmission state and timers greater than LMQT. The | |
1062 | second has the "Suppress Router-Side Processing" bit clear and | |
1063 | contains all the sources with retransmission state and timers lower | |
1064 | or equal to LMQT. If either of the two calculated messages does not | |
1065 | contain any sources, then its transmission is suppressed. | |
1066 | */ | |
a16db099 | 1067 | static int group_retransmit_sources(struct gm_group *group, |
12e41d03 DL |
1068 | int send_with_sflag_set) |
1069 | { | |
d62a17ae | 1070 | struct pim_interface *pim_ifp; |
1071 | long lmqc; /* Last Member Query Count */ | |
1072 | long lmqi_msec; /* Last Member Query Interval */ | |
1073 | long lmqt_msec; /* Last Member Query Time */ | |
1074 | char query_buf1[PIM_IGMP_BUFSIZE_WRITE]; /* 1 = with s_flag set */ | |
1075 | char query_buf2[PIM_IGMP_BUFSIZE_WRITE]; /* 2 = with s_flag clear */ | |
1076 | int query_buf1_max_sources; | |
1077 | int query_buf2_max_sources; | |
1078 | struct in_addr *source_addr1; | |
1079 | struct in_addr *source_addr2; | |
1080 | int num_sources_tosend1; | |
1081 | int num_sources_tosend2; | |
1082 | struct listnode *src_node; | |
51700107 | 1083 | struct gm_source *src; |
d62a17ae | 1084 | int num_retransmit_sources_left = 0; |
1085 | ||
1086 | source_addr1 = (struct in_addr *)(query_buf1 + IGMP_V3_SOURCES_OFFSET); | |
1087 | source_addr2 = (struct in_addr *)(query_buf2 + IGMP_V3_SOURCES_OFFSET); | |
1088 | ||
dda4d23c | 1089 | pim_ifp = group->interface->info; |
d62a17ae | 1090 | |
18adcff1 SG |
1091 | lmqc = pim_ifp->gm_last_member_query_count; |
1092 | lmqi_msec = 100 * pim_ifp->gm_specific_query_max_response_time_dsec; | |
d62a17ae | 1093 | lmqt_msec = lmqc * lmqi_msec; |
1094 | ||
1095 | /* Scan all group sources */ | |
1096 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { | |
1097 | ||
1098 | /* Source has retransmission state? */ | |
1099 | if (src->source_query_retransmit_count < 1) | |
1100 | continue; | |
1101 | ||
1102 | if (--src->source_query_retransmit_count > 0) { | |
1103 | ++num_retransmit_sources_left; | |
1104 | } | |
1105 | ||
1106 | /* Copy source address into appropriate query buffer */ | |
1107 | if (igmp_source_timer_remain_msec(src) > lmqt_msec) { | |
1108 | *source_addr1 = src->source_addr; | |
1109 | ++source_addr1; | |
1110 | } else { | |
1111 | *source_addr2 = src->source_addr; | |
1112 | ++source_addr2; | |
1113 | } | |
1114 | } | |
1115 | ||
1116 | num_sources_tosend1 = | |
1117 | source_addr1 | |
1118 | - (struct in_addr *)(query_buf1 + IGMP_V3_SOURCES_OFFSET); | |
1119 | num_sources_tosend2 = | |
1120 | source_addr2 | |
1121 | - (struct in_addr *)(query_buf2 + IGMP_V3_SOURCES_OFFSET); | |
1122 | ||
1123 | if (PIM_DEBUG_IGMP_TRACE) { | |
1124 | char group_str[INET_ADDRSTRLEN]; | |
1125 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1126 | sizeof(group_str)); | |
1127 | zlog_debug( | |
1128 | "retransmit_grp&src_specific_query: group %s on %s: srcs_with_sflag=%d srcs_wo_sflag=%d will_send_sflag=%d retransmit_src_left=%d", | |
dda4d23c | 1129 | group_str, group->interface->name, num_sources_tosend1, |
d62a17ae | 1130 | num_sources_tosend2, send_with_sflag_set, |
1131 | num_retransmit_sources_left); | |
1132 | } | |
1133 | ||
1134 | if (num_sources_tosend1 > 0) { | |
1135 | /* | |
1136 | Send group-and-source-specific query with s_flag set and all | |
1137 | sources with timers greater than LMQT. | |
1138 | */ | |
1139 | ||
1140 | if (send_with_sflag_set) { | |
1141 | ||
1142 | query_buf1_max_sources = | |
1143 | (sizeof(query_buf1) - IGMP_V3_SOURCES_OFFSET) | |
1144 | >> 2; | |
1145 | if (num_sources_tosend1 > query_buf1_max_sources) { | |
1146 | char group_str[INET_ADDRSTRLEN]; | |
1147 | pim_inet4_dump("<group?>", group->group_addr, | |
1148 | group_str, sizeof(group_str)); | |
1149 | zlog_warn( | |
1150 | "%s: group %s on %s: s_flag=1 unable to fit %d sources into buf_size=%zu (max_sources=%d)", | |
5e81f5dd | 1151 | __func__, group_str, |
dda4d23c | 1152 | group->interface->name, |
d62a17ae | 1153 | num_sources_tosend1, sizeof(query_buf1), |
1154 | query_buf1_max_sources); | |
1155 | } else { | |
1156 | /* | |
1157 | RFC3376: 4.1.12. IP Destination Addresses for | |
1158 | Queries | |
1159 | ||
1160 | Group-Specific and Group-and-Source-Specific | |
1161 | Queries are sent with | |
1162 | an IP destination address equal to the | |
1163 | multicast address of | |
1164 | interest. | |
1165 | */ | |
1166 | ||
a1a4295a DL |
1167 | igmp_send_query_group( |
1168 | group, query_buf1, sizeof(query_buf1), | |
1169 | num_sources_tosend1, 1 /* s_flag */); | |
d62a17ae | 1170 | } |
1171 | ||
1172 | } /* send_with_sflag_set */ | |
1173 | } | |
1174 | ||
1175 | if (num_sources_tosend2 > 0) { | |
1176 | /* | |
1177 | Send group-and-source-specific query with s_flag clear and all | |
1178 | sources with timers lower or equal to LMQT. | |
1179 | */ | |
1180 | ||
1181 | query_buf2_max_sources = | |
1182 | (sizeof(query_buf2) - IGMP_V3_SOURCES_OFFSET) >> 2; | |
1183 | if (num_sources_tosend2 > query_buf2_max_sources) { | |
1184 | char group_str[INET_ADDRSTRLEN]; | |
1185 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1186 | sizeof(group_str)); | |
1187 | zlog_warn( | |
1188 | "%s: group %s on %s: s_flag=0 unable to fit %d sources into buf_size=%zu (max_sources=%d)", | |
dda4d23c | 1189 | __func__, group_str, group->interface->name, |
5e81f5dd DS |
1190 | num_sources_tosend2, sizeof(query_buf2), |
1191 | query_buf2_max_sources); | |
d62a17ae | 1192 | } else { |
1193 | /* | |
1194 | RFC3376: 4.1.12. IP Destination Addresses for Queries | |
1195 | ||
1196 | Group-Specific and Group-and-Source-Specific Queries | |
1197 | are sent with | |
1198 | an IP destination address equal to the multicast | |
1199 | address of | |
1200 | interest. | |
1201 | */ | |
1202 | ||
a1a4295a DL |
1203 | igmp_send_query_group( |
1204 | group, query_buf2, sizeof(query_buf2), | |
1205 | num_sources_tosend2, 0 /* s_flag */); | |
d62a17ae | 1206 | } |
1207 | } | |
1208 | ||
1209 | return num_retransmit_sources_left; | |
12e41d03 DL |
1210 | } |
1211 | ||
cc9f21da | 1212 | static void igmp_group_retransmit(struct thread *t) |
12e41d03 | 1213 | { |
a16db099 | 1214 | struct gm_group *group; |
d62a17ae | 1215 | int num_retransmit_sources_left; |
1216 | int send_with_sflag_set; /* boolean */ | |
1217 | ||
1218 | group = THREAD_ARG(t); | |
1219 | ||
1220 | if (PIM_DEBUG_IGMP_TRACE) { | |
1221 | char group_str[INET_ADDRSTRLEN]; | |
1222 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1223 | sizeof(group_str)); | |
1224 | zlog_debug("group_retransmit_timer: group %s on %s", group_str, | |
dda4d23c | 1225 | group->interface->name); |
d62a17ae | 1226 | } |
1227 | ||
1228 | /* Retransmit group-specific queries? (RFC3376: 6.6.3.1) */ | |
1229 | if (group->group_specific_query_retransmit_count > 0) { | |
1230 | ||
1231 | /* Retransmit group-specific queries (RFC3376: 6.6.3.1) */ | |
1232 | group_retransmit_group(group); | |
1233 | --group->group_specific_query_retransmit_count; | |
1234 | ||
1235 | /* | |
1236 | RFC3376: 6.6.3.2 | |
1237 | If a group specific query is scheduled to be transmitted at | |
1238 | the | |
1239 | same time as a group and source specific query for the same | |
1240 | group, | |
1241 | then transmission of the group and source specific message | |
1242 | with the | |
1243 | "Suppress Router-Side Processing" bit set may be suppressed. | |
1244 | */ | |
1245 | send_with_sflag_set = 0; /* boolean=false */ | |
1246 | } else { | |
1247 | send_with_sflag_set = 1; /* boolean=true */ | |
1248 | } | |
1249 | ||
1250 | /* Retransmit group-and-source-specific queries (RFC3376: 6.6.3.2) */ | |
1251 | num_retransmit_sources_left = | |
1252 | group_retransmit_sources(group, send_with_sflag_set); | |
1253 | ||
1254 | /* | |
1255 | Keep group retransmit timer running if there is any retransmit | |
1256 | counter pending | |
1257 | */ | |
1258 | if ((num_retransmit_sources_left > 0) | |
1259 | || (group->group_specific_query_retransmit_count > 0)) { | |
1260 | group_retransmit_timer_on(group); | |
1261 | } | |
12e41d03 DL |
1262 | } |
1263 | ||
1264 | /* | |
1265 | group_retransmit_timer_on: | |
1266 | if group retransmit timer isn't running, starts it; | |
1267 | otherwise, do nothing | |
1268 | */ | |
a16db099 | 1269 | static void group_retransmit_timer_on(struct gm_group *group) |
12e41d03 | 1270 | { |
d62a17ae | 1271 | struct pim_interface *pim_ifp; |
1272 | long lmqi_msec; /* Last Member Query Interval */ | |
1273 | ||
1274 | /* if group retransmit timer is running, do nothing */ | |
1275 | if (group->t_group_query_retransmit_timer) { | |
1276 | return; | |
1277 | } | |
1278 | ||
dda4d23c | 1279 | pim_ifp = group->interface->info; |
d62a17ae | 1280 | |
18adcff1 | 1281 | lmqi_msec = 100 * pim_ifp->gm_specific_query_max_response_time_dsec; |
d62a17ae | 1282 | |
1283 | if (PIM_DEBUG_IGMP_TRACE) { | |
1284 | char group_str[INET_ADDRSTRLEN]; | |
1285 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1286 | sizeof(group_str)); | |
1287 | zlog_debug( | |
1288 | "Scheduling %ld.%03ld sec retransmit timer for group %s on %s", | |
1289 | lmqi_msec / 1000, lmqi_msec % 1000, group_str, | |
dda4d23c | 1290 | group->interface->name); |
d62a17ae | 1291 | } |
1292 | ||
36417fcc DS |
1293 | thread_add_timer_msec(router->master, igmp_group_retransmit, group, |
1294 | lmqi_msec, | |
d62a17ae | 1295 | &group->t_group_query_retransmit_timer); |
12e41d03 DL |
1296 | } |
1297 | ||
a16db099 | 1298 | static long igmp_group_timer_remain_msec(struct gm_group *group) |
12e41d03 | 1299 | { |
d62a17ae | 1300 | return pim_time_timer_remain_msec(group->t_group_timer); |
12e41d03 DL |
1301 | } |
1302 | ||
51700107 | 1303 | static long igmp_source_timer_remain_msec(struct gm_source *source) |
12e41d03 | 1304 | { |
d62a17ae | 1305 | return pim_time_timer_remain_msec(source->t_source_timer); |
12e41d03 DL |
1306 | } |
1307 | ||
1308 | /* | |
1309 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
1310 | */ | |
a16db099 | 1311 | static void group_query_send(struct gm_group *group) |
12e41d03 | 1312 | { |
59115451 | 1313 | struct pim_interface *pim_ifp; |
d62a17ae | 1314 | long lmqc; /* Last Member Query Count */ |
12e41d03 | 1315 | |
dda4d23c | 1316 | pim_ifp = group->interface->info; |
18adcff1 | 1317 | lmqc = pim_ifp->gm_last_member_query_count; |
12e41d03 | 1318 | |
d62a17ae | 1319 | /* lower group timer to lmqt */ |
1320 | igmp_group_timer_lower_to_lmqt(group); | |
12e41d03 | 1321 | |
d62a17ae | 1322 | /* reset retransmission counter */ |
1323 | group->group_specific_query_retransmit_count = lmqc; | |
12e41d03 | 1324 | |
d62a17ae | 1325 | /* immediately send group specific query (decrease retransmit counter by |
1326 | * 1)*/ | |
1327 | group_retransmit_group(group); | |
12e41d03 | 1328 | |
d62a17ae | 1329 | /* make sure group retransmit timer is running */ |
1330 | group_retransmit_timer_on(group); | |
12e41d03 DL |
1331 | } |
1332 | ||
1333 | /* | |
1334 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific Queries | |
1335 | */ | |
a16db099 | 1336 | static void source_query_send_by_flag(struct gm_group *group, |
12e41d03 DL |
1337 | int num_sources_tosend) |
1338 | { | |
d62a17ae | 1339 | struct pim_interface *pim_ifp; |
1340 | struct listnode *src_node; | |
51700107 | 1341 | struct gm_source *src; |
d62a17ae | 1342 | long lmqc; /* Last Member Query Count */ |
1343 | long lmqi_msec; /* Last Member Query Interval */ | |
1344 | long lmqt_msec; /* Last Member Query Time */ | |
1345 | ||
df5dfb77 | 1346 | assert(num_sources_tosend > 0); |
d62a17ae | 1347 | |
dda4d23c | 1348 | pim_ifp = group->interface->info; |
d62a17ae | 1349 | |
18adcff1 SG |
1350 | lmqc = pim_ifp->gm_last_member_query_count; |
1351 | lmqi_msec = 100 * pim_ifp->gm_specific_query_max_response_time_dsec; | |
d62a17ae | 1352 | lmqt_msec = lmqc * lmqi_msec; |
1353 | ||
1354 | /* | |
1355 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific | |
1356 | Queries | |
1357 | ||
1358 | (...) for each of the sources in X of group G, with source timer | |
1359 | larger | |
1360 | than LMQT: | |
1361 | o Set number of retransmissions for each source to [Last Member | |
1362 | Query Count]. | |
1363 | o Lower source timer to LMQT. | |
1364 | */ | |
1365 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { | |
1366 | if (IGMP_SOURCE_TEST_SEND(src->source_flags)) { | |
1367 | /* source "src" in X of group G */ | |
1368 | if (igmp_source_timer_remain_msec(src) > lmqt_msec) { | |
1369 | src->source_query_retransmit_count = lmqc; | |
1370 | igmp_source_timer_lower_to_lmqt(src); | |
1371 | } | |
1372 | } | |
1373 | } | |
1374 | ||
1375 | /* send group-and-source specific queries */ | |
1376 | group_retransmit_sources(group, 1 /* send_with_sflag_set=true */); | |
1377 | ||
1378 | /* make sure group retransmit timer is running */ | |
1379 | group_retransmit_timer_on(group); | |
12e41d03 DL |
1380 | } |
1381 | ||
a16db099 | 1382 | static void block_excl(struct gm_group *group, int num_sources, |
d62a17ae | 1383 | struct in_addr *sources) |
12e41d03 | 1384 | { |
d62a17ae | 1385 | int num_sources_tosend = 0; |
1386 | int i; | |
1387 | ||
1388 | /* 1. clear off SEND flag from all known sources (X,Y) */ | |
1389 | source_clear_send_flag(group->group_source_list); | |
1390 | ||
1391 | /* 2. scan received sources (A) */ | |
1392 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 1393 | struct gm_source *source; |
d62a17ae | 1394 | struct in_addr *src_addr; |
5421bf8f | 1395 | bool new; |
d62a17ae | 1396 | |
1397 | src_addr = sources + i; | |
1398 | ||
1399 | /* lookup reported source (A) in known sources (X,Y) */ | |
5421bf8f DL |
1400 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
1401 | if (!source) | |
1402 | continue; | |
1403 | ||
1404 | if (new) { | |
d62a17ae | 1405 | /* 3: if not found, create source with Group Timer: |
1406 | * (A-X-Y)=Group Timer */ | |
1407 | long group_timer_msec; | |
d62a17ae | 1408 | |
df5dfb77 | 1409 | assert(!source->t_source_timer); /* timer == 0 */ |
d62a17ae | 1410 | group_timer_msec = igmp_group_timer_remain_msec(group); |
1411 | igmp_source_timer_on(group, source, group_timer_msec); | |
df5dfb77 | 1412 | assert(source->t_source_timer); /* (A-X-Y) timer > 0 */ |
d62a17ae | 1413 | } |
1414 | ||
1415 | if (source->t_source_timer) { | |
1416 | /* 4. if source timer>0 mark SEND flag: Q(G,A-Y) */ | |
1417 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
1418 | ++num_sources_tosend; | |
1419 | } | |
1420 | } | |
1421 | ||
1422 | /* 5. send sources marked with SEND flag: Q(G,A-Y) */ | |
1423 | if (num_sources_tosend > 0) { | |
1424 | source_query_send_by_flag(group, num_sources_tosend); | |
1425 | } | |
12e41d03 DL |
1426 | } |
1427 | ||
a16db099 | 1428 | static void block_incl(struct gm_group *group, int num_sources, |
d62a17ae | 1429 | struct in_addr *sources) |
12e41d03 | 1430 | { |
d62a17ae | 1431 | int num_sources_tosend = 0; |
1432 | int i; | |
1433 | ||
1434 | /* 1. clear off SEND flag from all known sources (B) */ | |
1435 | source_clear_send_flag(group->group_source_list); | |
1436 | ||
1437 | /* 2. scan received sources (A) */ | |
1438 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 1439 | struct gm_source *source; |
d62a17ae | 1440 | struct in_addr *src_addr; |
1441 | ||
1442 | src_addr = sources + i; | |
1443 | ||
1444 | /* lookup reported source (A) in known sources (B) */ | |
1445 | source = igmp_find_source_by_addr(group, *src_addr); | |
1446 | if (source) { | |
1447 | /* 3. if found (A*B), mark SEND flag: Q(G,A*B) */ | |
1448 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
1449 | ++num_sources_tosend; | |
1450 | } | |
1451 | } | |
1452 | ||
1453 | /* 4. send sources marked with SEND flag: Q(G,A*B) */ | |
1454 | if (num_sources_tosend > 0) { | |
1455 | source_query_send_by_flag(group, num_sources_tosend); | |
1456 | } | |
12e41d03 DL |
1457 | } |
1458 | ||
c5f76fad | 1459 | void igmpv3_report_block(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 1460 | struct in_addr group_addr, int num_sources, |
1461 | struct in_addr *sources) | |
12e41d03 | 1462 | { |
d62a17ae | 1463 | struct interface *ifp = igmp->interface; |
a16db099 | 1464 | struct gm_group *group; |
d62a17ae | 1465 | |
15569c58 | 1466 | on_trace(__func__, ifp, from, group_addr, num_sources, sources); |
d62a17ae | 1467 | |
1468 | /* non-existant group is created as INCLUDE {empty} */ | |
1469 | group = igmp_add_group_by_addr(igmp, group_addr); | |
1470 | if (!group) { | |
1471 | return; | |
1472 | } | |
1473 | ||
1474 | if (group->group_filtermode_isexcl) { | |
1475 | /* EXCLUDE mode */ | |
1476 | block_excl(group, num_sources, sources); | |
1477 | } else { | |
1478 | /* INCLUDE mode */ | |
1479 | block_incl(group, num_sources, sources); | |
1480 | } | |
12e41d03 DL |
1481 | } |
1482 | ||
a16db099 | 1483 | void igmp_group_timer_lower_to_lmqt(struct gm_group *group) |
12e41d03 | 1484 | { |
d62a17ae | 1485 | struct interface *ifp; |
1486 | struct pim_interface *pim_ifp; | |
1487 | char *ifname; | |
1488 | int lmqi_dsec; /* Last Member Query Interval */ | |
1489 | int lmqc; /* Last Member Query Count */ | |
1490 | int lmqt_msec; /* Last Member Query Time */ | |
1491 | ||
1492 | /* | |
1493 | RFC 3376: 6.2.2. Definition of Group Timers | |
1494 | ||
1495 | The group timer is only used when a group is in EXCLUDE mode and | |
1496 | it represents the time for the *filter-mode* of the group to | |
1497 | expire and switch to INCLUDE mode. | |
1498 | */ | |
1499 | if (!group->group_filtermode_isexcl) { | |
1500 | return; | |
1501 | } | |
1502 | ||
dda4d23c | 1503 | ifp = group->interface; |
d62a17ae | 1504 | pim_ifp = ifp->info; |
1505 | ifname = ifp->name; | |
1506 | ||
18adcff1 SG |
1507 | lmqi_dsec = pim_ifp->gm_specific_query_max_response_time_dsec; |
1508 | lmqc = pim_ifp->gm_last_member_query_count; | |
d62a17ae | 1509 | lmqt_msec = PIM_IGMP_LMQT_MSEC( |
1510 | lmqi_dsec, lmqc); /* lmqt_msec = (100 * lmqi_dsec) * lmqc */ | |
1511 | ||
1512 | if (PIM_DEBUG_IGMP_TRACE) { | |
1513 | char group_str[INET_ADDRSTRLEN]; | |
1514 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1515 | sizeof(group_str)); | |
1516 | zlog_debug( | |
1517 | "%s: group %s on %s: LMQC=%d LMQI=%d dsec LMQT=%d msec", | |
15569c58 | 1518 | __func__, group_str, ifname, lmqc, lmqi_dsec, |
d62a17ae | 1519 | lmqt_msec); |
1520 | } | |
1521 | ||
df5dfb77 | 1522 | assert(group->group_filtermode_isexcl); |
d62a17ae | 1523 | |
1524 | igmp_group_timer_on(group, lmqt_msec, ifname); | |
12e41d03 DL |
1525 | } |
1526 | ||
51700107 | 1527 | void igmp_source_timer_lower_to_lmqt(struct gm_source *source) |
12e41d03 | 1528 | { |
a16db099 | 1529 | struct gm_group *group; |
d62a17ae | 1530 | struct interface *ifp; |
1531 | struct pim_interface *pim_ifp; | |
1532 | char *ifname; | |
1533 | int lmqi_dsec; /* Last Member Query Interval */ | |
1534 | int lmqc; /* Last Member Query Count */ | |
1535 | int lmqt_msec; /* Last Member Query Time */ | |
1536 | ||
1537 | group = source->source_group; | |
dda4d23c | 1538 | ifp = group->interface; |
d62a17ae | 1539 | pim_ifp = ifp->info; |
1540 | ifname = ifp->name; | |
1541 | ||
18adcff1 SG |
1542 | lmqi_dsec = pim_ifp->gm_specific_query_max_response_time_dsec; |
1543 | lmqc = pim_ifp->gm_last_member_query_count; | |
d62a17ae | 1544 | lmqt_msec = PIM_IGMP_LMQT_MSEC( |
1545 | lmqi_dsec, lmqc); /* lmqt_msec = (100 * lmqi_dsec) * lmqc */ | |
1546 | ||
1547 | if (PIM_DEBUG_IGMP_TRACE) { | |
1548 | char group_str[INET_ADDRSTRLEN]; | |
1549 | char source_str[INET_ADDRSTRLEN]; | |
1550 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1551 | sizeof(group_str)); | |
1552 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
1553 | sizeof(source_str)); | |
1554 | zlog_debug( | |
1555 | "%s: group %s source %s on %s: LMQC=%d LMQI=%d dsec LMQT=%d msec", | |
15569c58 DA |
1556 | __func__, group_str, source_str, ifname, lmqc, |
1557 | lmqi_dsec, lmqt_msec); | |
d62a17ae | 1558 | } |
1559 | ||
1560 | igmp_source_timer_on(group, source, lmqt_msec); | |
12e41d03 DL |
1561 | } |
1562 | ||
a16db099 | 1563 | void igmp_v3_send_query(struct gm_group *group, int fd, const char *ifname, |
d62a17ae | 1564 | char *query_buf, int query_buf_size, int num_sources, |
1565 | struct in_addr dst_addr, struct in_addr group_addr, | |
1566 | int query_max_response_time_dsec, uint8_t s_flag, | |
1567 | uint8_t querier_robustness_variable, | |
1568 | uint16_t querier_query_interval) | |
12e41d03 | 1569 | { |
d62a17ae | 1570 | ssize_t msg_size; |
1571 | uint8_t max_resp_code; | |
1572 | uint8_t qqic; | |
1573 | ssize_t sent; | |
1574 | struct sockaddr_in to; | |
1575 | socklen_t tolen; | |
1576 | uint16_t checksum; | |
1577 | ||
df5dfb77 | 1578 | assert(num_sources >= 0); |
d62a17ae | 1579 | |
1580 | msg_size = IGMP_V3_SOURCES_OFFSET + (num_sources << 2); | |
1581 | if (msg_size > query_buf_size) { | |
af4c2728 | 1582 | flog_err( |
450971aa | 1583 | EC_LIB_DEVELOPMENT, |
d62a17ae | 1584 | "%s %s: unable to send: msg_size=%zd larger than query_buf_size=%d", |
15569c58 | 1585 | __FILE__, __func__, msg_size, query_buf_size); |
d62a17ae | 1586 | return; |
1587 | } | |
1588 | ||
1589 | s_flag = PIM_FORCE_BOOLEAN(s_flag); | |
df5dfb77 | 1590 | assert((s_flag == 0) || (s_flag == 1)); |
d62a17ae | 1591 | |
1592 | max_resp_code = igmp_msg_encode16to8(query_max_response_time_dsec); | |
1593 | qqic = igmp_msg_encode16to8(querier_query_interval); | |
1594 | ||
1595 | /* | |
1596 | RFC 3376: 4.1.6. QRV (Querier's Robustness Variable) | |
1597 | ||
1598 | If non-zero, the QRV field contains the [Robustness Variable] | |
1599 | value used by the querier, i.e., the sender of the Query. If the | |
1600 | querier's [Robustness Variable] exceeds 7, the maximum value of | |
1601 | the QRV field, the QRV is set to zero. | |
1602 | */ | |
1603 | if (querier_robustness_variable > 7) { | |
1604 | querier_robustness_variable = 0; | |
1605 | } | |
1606 | ||
1607 | query_buf[0] = PIM_IGMP_MEMBERSHIP_QUERY; | |
1608 | query_buf[1] = max_resp_code; | |
1609 | *(uint16_t *)(query_buf + IGMP_CHECKSUM_OFFSET) = | |
1610 | 0; /* for computing checksum */ | |
1611 | memcpy(query_buf + 4, &group_addr, sizeof(struct in_addr)); | |
1612 | ||
1613 | query_buf[8] = (s_flag << 3) | querier_robustness_variable; | |
1614 | query_buf[9] = qqic; | |
1615 | *(uint16_t *)(query_buf + IGMP_V3_NUMSOURCES_OFFSET) = | |
1616 | htons(num_sources); | |
1617 | ||
1618 | checksum = in_cksum(query_buf, msg_size); | |
1619 | *(uint16_t *)(query_buf + IGMP_CHECKSUM_OFFSET) = checksum; | |
1620 | ||
1621 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1622 | char dst_str[INET_ADDRSTRLEN]; | |
1623 | char group_str[INET_ADDRSTRLEN]; | |
1624 | pim_inet4_dump("<dst?>", dst_addr, dst_str, sizeof(dst_str)); | |
1625 | pim_inet4_dump("<group?>", group_addr, group_str, | |
1626 | sizeof(group_str)); | |
1627 | zlog_debug( | |
1628 | "Send IGMPv3 query to %s on %s for group %s, sources=%d msg_size=%zd s_flag=%x QRV=%u QQI=%u QQIC=%02x", | |
1629 | dst_str, ifname, group_str, num_sources, msg_size, | |
1630 | s_flag, querier_robustness_variable, | |
1631 | querier_query_interval, qqic); | |
1632 | } | |
1633 | ||
1634 | memset(&to, 0, sizeof(to)); | |
1635 | to.sin_family = AF_INET; | |
1636 | to.sin_addr = dst_addr; | |
1637 | tolen = sizeof(to); | |
1638 | ||
1639 | sent = sendto(fd, query_buf, msg_size, MSG_DONTWAIT, | |
1640 | (struct sockaddr *)&to, tolen); | |
1641 | if (sent != (ssize_t)msg_size) { | |
1642 | char dst_str[INET_ADDRSTRLEN]; | |
1643 | char group_str[INET_ADDRSTRLEN]; | |
1644 | pim_inet4_dump("<dst?>", dst_addr, dst_str, sizeof(dst_str)); | |
1645 | pim_inet4_dump("<group?>", group_addr, group_str, | |
1646 | sizeof(group_str)); | |
1647 | if (sent < 0) { | |
1648 | zlog_warn( | |
1649 | "Send IGMPv3 query failed due to %s on %s: group=%s msg_size=%zd: errno=%d: %s", | |
1650 | dst_str, ifname, group_str, msg_size, errno, | |
1651 | safe_strerror(errno)); | |
1652 | } else { | |
1653 | zlog_warn( | |
1654 | "Send IGMPv3 query failed due to %s on %s: group=%s msg_size=%zd: sent=%zd", | |
1655 | dst_str, ifname, group_str, msg_size, sent); | |
1656 | } | |
1657 | return; | |
1658 | } | |
1659 | ||
1660 | /* | |
1661 | s_flag sanity test: s_flag must be set for general queries | |
1662 | ||
1663 | RFC 3376: 6.6.1. Timer Updates | |
1664 | ||
1665 | When a router sends or receives a query with a clear Suppress | |
1666 | Router-Side Processing flag, it must update its timers to reflect | |
1667 | the correct timeout values for the group or sources being queried. | |
1668 | ||
1669 | General queries don't trigger timer update. | |
1670 | */ | |
1671 | if (!s_flag) { | |
1672 | /* general query? */ | |
3ca68c9c | 1673 | if (group_addr.s_addr == INADDR_ANY) { |
d62a17ae | 1674 | char dst_str[INET_ADDRSTRLEN]; |
1675 | char group_str[INET_ADDRSTRLEN]; | |
1676 | pim_inet4_dump("<dst?>", dst_addr, dst_str, | |
1677 | sizeof(dst_str)); | |
1678 | pim_inet4_dump("<group?>", group_addr, group_str, | |
1679 | sizeof(group_str)); | |
1680 | zlog_warn( | |
1681 | "%s: to %s on %s: group=%s sources=%d: s_flag is clear for general query!", | |
15569c58 | 1682 | __func__, dst_str, ifname, group_str, |
d62a17ae | 1683 | num_sources); |
1684 | } | |
1685 | } | |
b05b72e8 DW |
1686 | } |
1687 | ||
c5f76fad | 1688 | void igmp_v3_recv_query(struct gm_sock *igmp, const char *from_str, |
d62a17ae | 1689 | char *igmp_msg) |
b05b72e8 | 1690 | { |
d62a17ae | 1691 | struct interface *ifp; |
1692 | struct pim_interface *pim_ifp; | |
1693 | struct in_addr group_addr; | |
1694 | uint8_t resv_s_qrv = 0; | |
1695 | uint8_t s_flag = 0; | |
1696 | uint8_t qrv = 0; | |
1697 | int i; | |
1698 | ||
1699 | memcpy(&group_addr, igmp_msg + 4, sizeof(struct in_addr)); | |
1700 | ifp = igmp->interface; | |
1701 | pim_ifp = ifp->info; | |
1702 | ||
1703 | /* | |
1704 | * RFC 3376: 4.1.6. QRV (Querier's Robustness Variable) | |
1705 | * | |
1706 | * Routers adopt the QRV value from the most recently received Query | |
1707 | * as their own [Robustness Variable] value, unless that most | |
1708 | * recently received QRV was zero, in which case the receivers use | |
1709 | * the default [Robustness Variable] value specified in section 8.1 | |
1710 | * or a statically configured value. | |
1711 | */ | |
1712 | resv_s_qrv = igmp_msg[8]; | |
1713 | qrv = 7 & resv_s_qrv; | |
1714 | igmp->querier_robustness_variable = | |
18adcff1 | 1715 | qrv ? qrv : pim_ifp->gm_default_robustness_variable; |
d62a17ae | 1716 | |
1717 | /* | |
1718 | * RFC 3376: 4.1.7. QQIC (Querier's Query Interval Code) | |
1719 | * | |
1720 | * Multicast routers that are not the current querier adopt the QQI | |
1721 | * value from the most recently received Query as their own [Query | |
1722 | * Interval] value, unless that most recently received QQI was zero, | |
1723 | * in which case the receiving routers use the default. | |
1724 | */ | |
1725 | if (igmp->t_other_querier_timer) { | |
1726 | /* other querier present */ | |
1727 | uint8_t qqic; | |
1728 | uint16_t qqi; | |
1729 | qqic = igmp_msg[9]; | |
1730 | qqi = igmp_msg_decode8to16(qqic); | |
1731 | igmp->querier_query_interval = | |
18adcff1 | 1732 | qqi ? qqi : pim_ifp->gm_default_query_interval; |
d62a17ae | 1733 | |
1734 | if (PIM_DEBUG_IGMP_TRACE) { | |
1735 | char ifaddr_str[INET_ADDRSTRLEN]; | |
1736 | pim_inet4_dump("<ifaddr?>", igmp->ifaddr, ifaddr_str, | |
1737 | sizeof(ifaddr_str)); | |
1738 | zlog_debug( | |
1739 | "Querier %s new query interval is %s QQI=%u sec (recv QQIC=%02x from %s)", | |
1740 | ifaddr_str, | |
1741 | qqi ? "recv-non-default" : "default", | |
1742 | igmp->querier_query_interval, qqic, from_str); | |
1743 | } | |
1744 | } | |
1745 | ||
1746 | /* | |
1747 | * RFC 3376: 6.6.1. Timer Updates | |
1748 | * | |
1749 | * When a router sends or receives a query with a clear Suppress | |
1750 | * Router-Side Processing flag, it must update its timers to reflect | |
1751 | * the correct timeout values for the group or sources being queried. | |
1752 | * | |
1753 | * General queries don't trigger timer update. | |
1754 | */ | |
1755 | s_flag = (1 << 3) & resv_s_qrv; | |
1756 | ||
1757 | if (!s_flag) { | |
1758 | /* s_flag is clear */ | |
1759 | ||
3ca68c9c | 1760 | if (group_addr.s_addr == INADDR_ANY) { |
d62a17ae | 1761 | /* this is a general query */ |
1762 | /* log that general query should have the s_flag set */ | |
1763 | zlog_warn( | |
1764 | "General IGMP query v3 from %s on %s: Suppress Router-Side Processing flag is clear", | |
1765 | from_str, ifp->name); | |
1766 | } else { | |
a16db099 | 1767 | struct gm_group *group; |
d62a17ae | 1768 | |
1769 | /* this is a non-general query: perform timer updates */ | |
1770 | ||
1771 | group = find_group_by_addr(igmp, group_addr); | |
1772 | if (group) { | |
1773 | int recv_num_sources = ntohs(*( | |
1774 | uint16_t | |
1775 | *)(igmp_msg | |
1776 | + IGMP_V3_NUMSOURCES_OFFSET)); | |
1777 | ||
1778 | /* | |
1779 | * RFC 3376: 6.6.1. Timer Updates | |
1780 | * Query Q(G,A): Source Timer for sources in A | |
1781 | * are lowered to LMQT | |
1782 | * Query Q(G): Group Timer is lowered to LMQT | |
1783 | */ | |
1784 | if (recv_num_sources < 1) { | |
1785 | /* Query Q(G): Group Timer is lowered to | |
1786 | * LMQT */ | |
1787 | ||
1788 | igmp_group_timer_lower_to_lmqt(group); | |
1789 | } else { | |
1790 | /* Query Q(G,A): Source Timer for | |
1791 | * sources in A are lowered to LMQT */ | |
1792 | ||
1793 | /* Scan sources in query and lower their | |
1794 | * timers to LMQT */ | |
1795 | struct in_addr *sources = | |
1796 | (struct in_addr | |
1797 | *)(igmp_msg | |
1798 | + IGMP_V3_SOURCES_OFFSET); | |
1799 | for (i = 0; i < recv_num_sources; ++i) { | |
1800 | struct in_addr src_addr; | |
51700107 | 1801 | struct gm_source *src; |
d62a17ae | 1802 | memcpy(&src_addr, sources + i, |
1803 | sizeof(struct in_addr)); | |
1804 | src = igmp_find_source_by_addr( | |
1805 | group, src_addr); | |
1806 | if (src) { | |
1807 | igmp_source_timer_lower_to_lmqt( | |
1808 | src); | |
1809 | } | |
1810 | } | |
1811 | } | |
1812 | } else { | |
1813 | char group_str[INET_ADDRSTRLEN]; | |
1814 | pim_inet4_dump("<group?>", group_addr, | |
1815 | group_str, sizeof(group_str)); | |
1816 | zlog_warn( | |
1817 | "IGMP query v3 from %s on %s: could not find group %s for timer update", | |
1818 | from_str, ifp->name, group_str); | |
1819 | } | |
1820 | } | |
1821 | } /* s_flag is clear: timer updates */ | |
b05b72e8 DW |
1822 | } |
1823 | ||
f6053ff2 A |
1824 | static bool igmp_pkt_grp_addr_ok(struct interface *ifp, const char *from_str, |
1825 | struct in_addr grp, int rec_type) | |
1826 | { | |
1827 | struct pim_interface *pim_ifp; | |
1828 | struct in_addr grp_addr; | |
1829 | ||
1830 | pim_ifp = ifp->info; | |
1831 | ||
1832 | /* determine filtering status for group */ | |
1833 | if (pim_is_group_filtered(pim_ifp, &grp)) { | |
1834 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1835 | zlog_debug( | |
1836 | "Filtering IGMPv3 group record %pI4 from %s on %s per prefix-list %s", | |
1837 | &grp.s_addr, from_str, ifp->name, | |
1838 | pim_ifp->boundary_oil_plist); | |
1839 | } | |
1840 | return false; | |
1841 | } | |
1842 | ||
1843 | /* | |
1844 | * If we receive a igmp report with the group in 224.0.0.0/24 | |
1845 | * then we should ignore it | |
1846 | */ | |
1847 | ||
1848 | grp_addr.s_addr = ntohl(grp.s_addr); | |
1849 | ||
1850 | if (pim_is_group_224_0_0_0_24(grp_addr)) { | |
1851 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1852 | zlog_debug( | |
1853 | "Ignoring IGMPv3 group record %pI4 from %s on %s group range falls in 224.0.0.0/24", | |
1854 | &grp.s_addr, from_str, ifp->name); | |
1855 | } | |
1856 | return false; | |
1857 | } | |
1858 | ||
1859 | /* | |
1860 | * RFC 4604 | |
1861 | * section 2.2.1 | |
1862 | * EXCLUDE mode does not apply to SSM addresses, and an SSM-aware router | |
1863 | * will ignore MODE_IS_EXCLUDE and CHANGE_TO_EXCLUDE_MODE requests in | |
1864 | * the SSM range. | |
1865 | */ | |
1866 | if (pim_is_grp_ssm(pim_ifp->pim, grp)) { | |
1867 | switch (rec_type) { | |
1868 | case IGMP_GRP_REC_TYPE_MODE_IS_EXCLUDE: | |
1869 | case IGMP_GRP_REC_TYPE_CHANGE_TO_EXCLUDE_MODE: | |
1870 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1871 | zlog_debug( | |
1872 | "Ignoring IGMPv3 group record %pI4 from %s on %s exclude mode in SSM range", | |
1873 | &grp.s_addr, from_str, ifp->name); | |
1874 | } | |
1875 | return false; | |
1876 | } | |
1877 | } | |
1878 | ||
1879 | return true; | |
1880 | } | |
1881 | ||
c5f76fad | 1882 | int igmp_v3_recv_report(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 1883 | const char *from_str, char *igmp_msg, int igmp_msg_len) |
b05b72e8 | 1884 | { |
d62a17ae | 1885 | int num_groups; |
1886 | uint8_t *group_record; | |
1887 | uint8_t *report_pastend = (uint8_t *)igmp_msg + igmp_msg_len; | |
1888 | struct interface *ifp = igmp->interface; | |
1889 | int i; | |
b0f525a8 | 1890 | |
f83f3966 MS |
1891 | if (igmp->mtrace_only) |
1892 | return 0; | |
1893 | ||
d62a17ae | 1894 | if (igmp_msg_len < IGMP_V3_MSG_MIN_SIZE) { |
1895 | zlog_warn( | |
1896 | "Recv IGMP report v3 from %s on %s: size=%d shorter than minimum=%d", | |
1897 | from_str, ifp->name, igmp_msg_len, | |
1898 | IGMP_V3_MSG_MIN_SIZE); | |
1899 | return -1; | |
1900 | } | |
1901 | ||
9041c30a | 1902 | if (igmp_validate_checksum(igmp_msg, igmp_msg_len) == -1) { |
d62a17ae | 1903 | zlog_warn( |
9041c30a MR |
1904 | "Recv IGMPv3 report from %s on %s with invalid checksum", |
1905 | from_str, ifp->name); | |
d62a17ae | 1906 | return -1; |
1907 | } | |
1908 | ||
21313cbf | 1909 | /* Collecting IGMP Rx stats */ |
f2058cb4 | 1910 | igmp->igmp_stats.report_v3++; |
21313cbf | 1911 | |
d62a17ae | 1912 | num_groups = ntohs( |
1913 | *(uint16_t *)(igmp_msg + IGMP_V3_REPORT_NUMGROUPS_OFFSET)); | |
1914 | if (num_groups < 1) { | |
1915 | zlog_warn( | |
1916 | "Recv IGMP report v3 from %s on %s: missing group records", | |
1917 | from_str, ifp->name); | |
1918 | return -1; | |
1919 | } | |
1920 | ||
1921 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1922 | zlog_debug( | |
9041c30a MR |
1923 | "Recv IGMP report v3 from %s on %s: size=%d groups=%d", |
1924 | from_str, ifp->name, igmp_msg_len, num_groups); | |
d62a17ae | 1925 | } |
1926 | ||
1927 | group_record = (uint8_t *)igmp_msg + IGMP_V3_REPORT_GROUPPRECORD_OFFSET; | |
1928 | ||
1929 | /* Scan groups */ | |
1930 | for (i = 0; i < num_groups; ++i) { | |
1931 | struct in_addr rec_group; | |
1932 | uint8_t *sources; | |
1933 | uint8_t *src; | |
1934 | int rec_type; | |
1935 | int rec_auxdatalen; | |
1936 | int rec_num_sources; | |
1937 | int j; | |
d62a17ae | 1938 | |
1939 | if ((group_record + IGMP_V3_GROUP_RECORD_MIN_SIZE) | |
1940 | > report_pastend) { | |
1941 | zlog_warn( | |
1942 | "Recv IGMP report v3 from %s on %s: group record beyond report end", | |
1943 | from_str, ifp->name); | |
1944 | return -1; | |
1945 | } | |
1946 | ||
1947 | rec_type = group_record[IGMP_V3_GROUP_RECORD_TYPE_OFFSET]; | |
1948 | rec_auxdatalen = | |
1949 | group_record[IGMP_V3_GROUP_RECORD_AUXDATALEN_OFFSET]; | |
1950 | rec_num_sources = ntohs(*( | |
1951 | uint16_t *)(group_record | |
1952 | + IGMP_V3_GROUP_RECORD_NUMSOURCES_OFFSET)); | |
1953 | ||
1954 | memcpy(&rec_group, | |
1955 | group_record + IGMP_V3_GROUP_RECORD_GROUP_OFFSET, | |
1956 | sizeof(struct in_addr)); | |
1957 | ||
1958 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1959 | zlog_debug( | |
ee2bbf7c | 1960 | " Recv IGMP report v3 from %s on %s: record=%d type=%d auxdatalen=%d sources=%d group=%pI4", |
d62a17ae | 1961 | from_str, ifp->name, i, rec_type, |
1962 | rec_auxdatalen, rec_num_sources, | |
ee2bbf7c | 1963 | &rec_group); |
d62a17ae | 1964 | } |
1965 | ||
1966 | /* Scan sources */ | |
1967 | ||
1968 | sources = group_record + IGMP_V3_GROUP_RECORD_SOURCE_OFFSET; | |
1969 | ||
1970 | for (j = 0, src = sources; j < rec_num_sources; ++j, src += 4) { | |
1971 | ||
1972 | if ((src + 4) > report_pastend) { | |
1973 | zlog_warn( | |
1974 | "Recv IGMP report v3 from %s on %s: group source beyond report end", | |
1975 | from_str, ifp->name); | |
1976 | return -1; | |
1977 | } | |
1978 | ||
1979 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1980 | char src_str[200]; | |
1981 | ||
1982 | if (!inet_ntop(AF_INET, src, src_str, | |
1983 | sizeof(src_str))) | |
772270f3 QY |
1984 | snprintf(src_str, sizeof(src_str), |
1985 | "<source?>"); | |
d62a17ae | 1986 | |
1987 | zlog_debug( | |
ee2bbf7c | 1988 | " Recv IGMP report v3 from %s on %s: record=%d group=%pI4 source=%s", |
d62a17ae | 1989 | from_str, ifp->name, i, |
ee2bbf7c | 1990 | &rec_group, src_str); |
d62a17ae | 1991 | } |
1992 | } /* for (sources) */ | |
1993 | ||
1994 | ||
f6053ff2 | 1995 | if (igmp_pkt_grp_addr_ok(ifp, from_str, rec_group, rec_type)) |
d62a17ae | 1996 | switch (rec_type) { |
1997 | case IGMP_GRP_REC_TYPE_MODE_IS_INCLUDE: | |
1998 | igmpv3_report_isin(igmp, from, rec_group, | |
1999 | rec_num_sources, | |
2000 | (struct in_addr *)sources); | |
2001 | break; | |
2002 | case IGMP_GRP_REC_TYPE_MODE_IS_EXCLUDE: | |
2003 | igmpv3_report_isex( | |
2004 | igmp, from, rec_group, rec_num_sources, | |
2005 | (struct in_addr *)sources, 0); | |
2006 | break; | |
2007 | case IGMP_GRP_REC_TYPE_CHANGE_TO_INCLUDE_MODE: | |
2008 | igmpv3_report_toin(igmp, from, rec_group, | |
2009 | rec_num_sources, | |
2010 | (struct in_addr *)sources); | |
2011 | break; | |
2012 | case IGMP_GRP_REC_TYPE_CHANGE_TO_EXCLUDE_MODE: | |
2013 | igmpv3_report_toex(igmp, from, rec_group, | |
2014 | rec_num_sources, | |
2015 | (struct in_addr *)sources); | |
2016 | break; | |
2017 | case IGMP_GRP_REC_TYPE_ALLOW_NEW_SOURCES: | |
2018 | igmpv3_report_allow(igmp, from, rec_group, | |
2019 | rec_num_sources, | |
2020 | (struct in_addr *)sources); | |
2021 | break; | |
2022 | case IGMP_GRP_REC_TYPE_BLOCK_OLD_SOURCES: | |
2023 | igmpv3_report_block(igmp, from, rec_group, | |
2024 | rec_num_sources, | |
2025 | (struct in_addr *)sources); | |
2026 | break; | |
2027 | default: | |
2028 | zlog_warn( | |
2029 | "Recv IGMP report v3 from %s on %s: unknown record type: type=%d", | |
2030 | from_str, ifp->name, rec_type); | |
2031 | } | |
2032 | ||
2033 | group_record += | |
2034 | 8 + (rec_num_sources << 2) + (rec_auxdatalen << 2); | |
d62a17ae | 2035 | |
2036 | } /* for (group records) */ | |
2037 | ||
2038 | return 0; | |
12e41d03 | 2039 | } |