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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" |
12e41d03 DL |
24 | |
25 | #include "pimd.h" | |
26 | #include "pim_iface.h" | |
27 | #include "pim_igmp.h" | |
28 | #include "pim_igmpv3.h" | |
29 | #include "pim_str.h" | |
30 | #include "pim_util.h" | |
31 | #include "pim_time.h" | |
32 | #include "pim_zebra.h" | |
33 | #include "pim_oil.h" | |
34 | ||
35 | static void group_retransmit_timer_on(struct igmp_group *group); | |
36 | static long igmp_group_timer_remain_msec(struct igmp_group *group); | |
37 | static long igmp_source_timer_remain_msec(struct igmp_source *source); | |
38 | static void group_query_send(struct igmp_group *group); | |
39 | static void source_query_send_by_flag(struct igmp_group *group, | |
40 | int num_sources_tosend); | |
41 | ||
42 | static void on_trace(const char *label, | |
43 | struct interface *ifp, struct in_addr from, | |
44 | struct in_addr group_addr, | |
45 | int num_sources, struct in_addr *sources) | |
46 | { | |
47 | if (PIM_DEBUG_IGMP_TRACE) { | |
eaa54bdb DW |
48 | char from_str[INET_ADDRSTRLEN]; |
49 | char group_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
50 | |
51 | pim_inet4_dump("<from?>", from, from_str, sizeof(from_str)); | |
52 | pim_inet4_dump("<group?>", group_addr, group_str, sizeof(group_str)); | |
53 | ||
54 | zlog_debug("%s: from %s on %s: group=%s sources=%d", | |
55 | label, from_str, ifp->name, group_str, num_sources); | |
56 | } | |
57 | } | |
58 | ||
12e41d03 DL |
59 | void igmp_group_reset_gmi(struct igmp_group *group) |
60 | { | |
61 | long group_membership_interval_msec; | |
62 | struct pim_interface *pim_ifp; | |
63 | struct igmp_sock *igmp; | |
64 | struct interface *ifp; | |
65 | ||
66 | igmp = group->group_igmp_sock; | |
67 | ifp = igmp->interface; | |
68 | pim_ifp = ifp->info; | |
69 | ||
70 | /* | |
71 | RFC 3376: 8.4. Group Membership Interval | |
72 | ||
73 | The Group Membership Interval is the amount of time that must pass | |
74 | before a multicast router decides there are no more members of a | |
75 | group or a particular source on a network. | |
76 | ||
77 | This value MUST be ((the Robustness Variable) times (the Query | |
78 | Interval)) plus (one Query Response Interval). | |
79 | ||
80 | group_membership_interval_msec = querier_robustness_variable * | |
81 | (1000 * querier_query_interval) + | |
82 | 100 * query_response_interval_dsec; | |
83 | */ | |
84 | group_membership_interval_msec = | |
85 | PIM_IGMP_GMI_MSEC(igmp->querier_robustness_variable, | |
86 | igmp->querier_query_interval, | |
87 | pim_ifp->igmp_query_max_response_time_dsec); | |
88 | ||
89 | if (PIM_DEBUG_IGMP_TRACE) { | |
eaa54bdb | 90 | char group_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
91 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); |
92 | zlog_debug("Resetting group %s timer to GMI=%ld.%03ld sec on %s", | |
93 | group_str, | |
94 | group_membership_interval_msec / 1000, | |
95 | group_membership_interval_msec % 1000, | |
96 | ifp->name); | |
97 | } | |
98 | ||
99 | /* | |
100 | RFC 3376: 6.2.2. Definition of Group Timers | |
101 | ||
102 | The group timer is only used when a group is in EXCLUDE mode and | |
103 | it represents the time for the *filter-mode* of the group to | |
104 | expire and switch to INCLUDE mode. | |
105 | */ | |
106 | zassert(group->group_filtermode_isexcl); | |
107 | ||
108 | igmp_group_timer_on(group, group_membership_interval_msec, ifp->name); | |
109 | } | |
110 | ||
111 | static int igmp_source_timer(struct thread *t) | |
112 | { | |
113 | struct igmp_source *source; | |
114 | struct igmp_group *group; | |
115 | ||
12e41d03 | 116 | source = THREAD_ARG(t); |
12e41d03 DL |
117 | |
118 | group = source->source_group; | |
119 | ||
120 | if (PIM_DEBUG_IGMP_TRACE) { | |
eaa54bdb DW |
121 | char group_str[INET_ADDRSTRLEN]; |
122 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
123 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); |
124 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
125 | zlog_debug("%s: Source timer expired for group %s source %s on %s", | |
126 | __PRETTY_FUNCTION__, | |
127 | group_str, source_str, | |
128 | group->group_igmp_sock->interface->name); | |
129 | } | |
130 | ||
12e41d03 DL |
131 | /* |
132 | RFC 3376: 6.3. IGMPv3 Source-Specific Forwarding Rules | |
133 | ||
134 | Group | |
135 | Filter-Mode Source Timer Value Action | |
136 | ----------- ------------------ ------ | |
137 | INCLUDE TIMER == 0 Suggest to stop forwarding | |
138 | traffic from source and | |
139 | remove source record. If | |
140 | there are no more source | |
141 | records for the group, delete | |
142 | group record. | |
143 | ||
144 | EXCLUDE TIMER == 0 Suggest to not forward | |
145 | traffic from source | |
146 | (DO NOT remove record) | |
147 | ||
148 | Source timer switched from (T > 0) to (T == 0): disable forwarding. | |
149 | */ | |
150 | ||
12e41d03 DL |
151 | if (group->group_filtermode_isexcl) { |
152 | /* EXCLUDE mode */ | |
153 | ||
154 | igmp_source_forward_stop(source); | |
155 | } | |
156 | else { | |
157 | /* INCLUDE mode */ | |
158 | ||
159 | /* igmp_source_delete() will stop forwarding source */ | |
160 | igmp_source_delete(source); | |
161 | ||
162 | /* | |
163 | If there are no more source records for the group, delete group | |
164 | record. | |
165 | */ | |
166 | if (!listcount(group->group_source_list)) { | |
167 | igmp_group_delete_empty_include(group); | |
168 | } | |
169 | } | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | static void source_timer_off(struct igmp_group *group, | |
175 | struct igmp_source *source) | |
176 | { | |
177 | if (!source->t_source_timer) | |
178 | return; | |
179 | ||
180 | if (PIM_DEBUG_IGMP_TRACE) { | |
eaa54bdb DW |
181 | char group_str[INET_ADDRSTRLEN]; |
182 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
183 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); |
184 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
185 | zlog_debug("Cancelling TIMER event for group %s source %s on %s", | |
186 | group_str, source_str, | |
187 | group->group_igmp_sock->interface->name); | |
188 | } | |
189 | ||
190 | THREAD_OFF(source->t_source_timer); | |
12e41d03 DL |
191 | } |
192 | ||
193 | static void igmp_source_timer_on(struct igmp_group *group, | |
194 | struct igmp_source *source, | |
195 | long interval_msec) | |
196 | { | |
197 | source_timer_off(group, source); | |
198 | ||
199 | if (PIM_DEBUG_IGMP_EVENTS) { | |
eaa54bdb DW |
200 | char group_str[INET_ADDRSTRLEN]; |
201 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
202 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); |
203 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
204 | zlog_debug("Scheduling %ld.%03ld sec TIMER event for group %s source %s on %s", | |
205 | interval_msec / 1000, | |
206 | interval_msec % 1000, | |
207 | group_str, source_str, | |
208 | group->group_igmp_sock->interface->name); | |
209 | } | |
210 | ||
ffa2c898 QY |
211 | thread_add_timer_msec(master, igmp_source_timer, source, interval_msec, |
212 | &source->t_source_timer); | |
12e41d03 DL |
213 | |
214 | /* | |
215 | RFC 3376: 6.3. IGMPv3 Source-Specific Forwarding Rules | |
216 | ||
217 | Source timer switched from (T == 0) to (T > 0): enable forwarding. | |
218 | */ | |
219 | igmp_source_forward_start(source); | |
220 | } | |
221 | ||
222 | void igmp_source_reset_gmi(struct igmp_sock *igmp, | |
223 | struct igmp_group *group, | |
224 | struct igmp_source *source) | |
225 | { | |
226 | long group_membership_interval_msec; | |
227 | struct pim_interface *pim_ifp; | |
228 | struct interface *ifp; | |
229 | ||
230 | ifp = igmp->interface; | |
231 | pim_ifp = ifp->info; | |
232 | ||
233 | group_membership_interval_msec = | |
234 | PIM_IGMP_GMI_MSEC(igmp->querier_robustness_variable, | |
235 | igmp->querier_query_interval, | |
236 | pim_ifp->igmp_query_max_response_time_dsec); | |
237 | ||
238 | if (PIM_DEBUG_IGMP_TRACE) { | |
eaa54bdb DW |
239 | char group_str[INET_ADDRSTRLEN]; |
240 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
241 | |
242 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
243 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
244 | ||
245 | zlog_debug("Resetting source %s timer to GMI=%ld.%03ld sec for group %s on %s", | |
246 | source_str, | |
247 | group_membership_interval_msec / 1000, | |
248 | group_membership_interval_msec % 1000, | |
249 | group_str, | |
250 | ifp->name); | |
251 | } | |
252 | ||
253 | igmp_source_timer_on(group, source, | |
254 | group_membership_interval_msec); | |
255 | } | |
256 | ||
d2ccd60b | 257 | static void source_mark_delete_flag(struct igmp_group *group) |
12e41d03 DL |
258 | { |
259 | struct listnode *src_node; | |
260 | struct igmp_source *src; | |
261 | ||
d2ccd60b | 262 | for (ALL_LIST_ELEMENTS_RO (group->group_source_list, src_node, src)) { |
12e41d03 DL |
263 | IGMP_SOURCE_DO_DELETE(src->source_flags); |
264 | } | |
265 | } | |
266 | ||
d2ccd60b | 267 | static void source_mark_send_flag (struct igmp_group *group) |
12e41d03 DL |
268 | { |
269 | struct listnode *src_node; | |
270 | struct igmp_source *src; | |
271 | ||
d2ccd60b | 272 | for (ALL_LIST_ELEMENTS_RO (group->group_source_list, src_node, src)) { |
12e41d03 DL |
273 | IGMP_SOURCE_DO_SEND(src->source_flags); |
274 | } | |
275 | } | |
276 | ||
d2ccd60b | 277 | static int source_mark_send_flag_by_timer (struct igmp_group *group) |
12e41d03 DL |
278 | { |
279 | struct listnode *src_node; | |
280 | struct igmp_source *src; | |
281 | int num_marked_sources = 0; | |
282 | ||
d2ccd60b | 283 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { |
12e41d03 DL |
284 | /* Is source timer running? */ |
285 | if (src->t_source_timer) { | |
286 | IGMP_SOURCE_DO_SEND(src->source_flags); | |
287 | ++num_marked_sources; | |
288 | } | |
289 | else { | |
290 | IGMP_SOURCE_DONT_SEND(src->source_flags); | |
291 | } | |
292 | } | |
293 | ||
294 | return num_marked_sources; | |
295 | } | |
296 | ||
297 | static void source_clear_send_flag(struct list *source_list) | |
298 | { | |
299 | struct listnode *src_node; | |
300 | struct igmp_source *src; | |
301 | ||
302 | for (ALL_LIST_ELEMENTS_RO(source_list, src_node, src)) { | |
303 | IGMP_SOURCE_DONT_SEND(src->source_flags); | |
304 | } | |
305 | } | |
306 | ||
307 | /* | |
308 | Any source (*,G) is forwarded only if mode is EXCLUDE {empty} | |
309 | */ | |
310 | static void group_exclude_fwd_anysrc_ifempty(struct igmp_group *group) | |
311 | { | |
312 | zassert(group->group_filtermode_isexcl); | |
313 | ||
314 | if (listcount(group->group_source_list) < 1) { | |
315 | igmp_anysource_forward_start(group); | |
316 | } | |
317 | } | |
318 | ||
319 | void igmp_source_free(struct igmp_source *source) | |
320 | { | |
321 | /* make sure there is no source timer running */ | |
322 | zassert(!source->t_source_timer); | |
323 | ||
324 | XFREE(MTYPE_PIM_IGMP_GROUP_SOURCE, source); | |
325 | } | |
326 | ||
327 | static void source_channel_oil_detach(struct igmp_source *source) | |
328 | { | |
329 | if (source->source_channel_oil) { | |
330 | pim_channel_oil_del(source->source_channel_oil); | |
980e9393 | 331 | source->source_channel_oil = NULL; |
12e41d03 DL |
332 | } |
333 | } | |
334 | ||
335 | /* | |
336 | igmp_source_delete: stop fowarding, and delete the source | |
337 | igmp_source_forward_stop: stop fowarding, but keep the source | |
338 | */ | |
339 | void igmp_source_delete(struct igmp_source *source) | |
340 | { | |
341 | struct igmp_group *group; | |
608a261b | 342 | struct in_addr src; |
12e41d03 DL |
343 | |
344 | group = source->source_group; | |
345 | ||
346 | if (PIM_DEBUG_IGMP_TRACE) { | |
eaa54bdb DW |
347 | char group_str[INET_ADDRSTRLEN]; |
348 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
349 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); |
350 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
815c33c9 | 351 | zlog_debug("Deleting IGMP source %s for group %s from socket %d interface %s c_oil ref_count %d", |
12e41d03 DL |
352 | source_str, group_str, |
353 | group->group_igmp_sock->fd, | |
815c33c9 CS |
354 | group->group_igmp_sock->interface->name, |
355 | source->source_channel_oil ? source->source_channel_oil->oil_ref_count : 0); | |
12e41d03 DL |
356 | } |
357 | ||
358 | source_timer_off(group, source); | |
359 | igmp_source_forward_stop(source); | |
360 | ||
361 | /* sanity check that forwarding has been disabled */ | |
362 | if (IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
eaa54bdb DW |
363 | char group_str[INET_ADDRSTRLEN]; |
364 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
365 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); |
366 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
367 | zlog_warn("%s: forwarding=ON(!) IGMP source %s for group %s from socket %d interface %s", | |
368 | __PRETTY_FUNCTION__, | |
369 | source_str, group_str, | |
370 | group->group_igmp_sock->fd, | |
371 | group->group_igmp_sock->interface->name); | |
372 | /* warning only */ | |
373 | } | |
374 | ||
375 | source_channel_oil_detach(source); | |
376 | ||
377 | /* | |
378 | notice that listnode_delete() can't be moved | |
379 | into igmp_source_free() because the later is | |
380 | called by list_delete_all_node() | |
381 | */ | |
382 | listnode_delete(group->group_source_list, source); | |
383 | ||
608a261b | 384 | src.s_addr = source->source_addr.s_addr; |
12e41d03 | 385 | igmp_source_free(source); |
608a261b | 386 | |
e81d9709 CS |
387 | /* Group source list is empty and current source is * then |
388 | *,G group going away so do not trigger start */ | |
389 | if (group->group_filtermode_isexcl && | |
390 | (listcount (group->group_source_list) != 0) && | |
608a261b | 391 | src.s_addr != INADDR_ANY) |
e81d9709 CS |
392 | { |
393 | group_exclude_fwd_anysrc_ifempty (group); | |
394 | } | |
12e41d03 DL |
395 | } |
396 | ||
397 | static void source_delete_by_flag(struct list *source_list) | |
398 | { | |
399 | struct listnode *src_node; | |
400 | struct listnode *src_nextnode; | |
401 | struct igmp_source *src; | |
402 | ||
403 | for (ALL_LIST_ELEMENTS(source_list, src_node, src_nextnode, src)) | |
404 | if (IGMP_SOURCE_TEST_DELETE(src->source_flags)) | |
405 | igmp_source_delete(src); | |
406 | } | |
407 | ||
408 | void igmp_source_delete_expired(struct list *source_list) | |
409 | { | |
410 | struct listnode *src_node; | |
411 | struct listnode *src_nextnode; | |
412 | struct igmp_source *src; | |
413 | ||
414 | for (ALL_LIST_ELEMENTS(source_list, src_node, src_nextnode, src)) | |
415 | if (!src->t_source_timer) | |
416 | igmp_source_delete(src); | |
417 | } | |
418 | ||
419 | struct igmp_source *igmp_find_source_by_addr(struct igmp_group *group, | |
420 | struct in_addr src_addr) | |
421 | { | |
422 | struct listnode *src_node; | |
423 | struct igmp_source *src; | |
424 | ||
425 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) | |
426 | if (src_addr.s_addr == src->source_addr.s_addr) | |
427 | return src; | |
428 | ||
429 | return 0; | |
430 | } | |
431 | ||
9bd7302f DS |
432 | struct igmp_source * |
433 | source_new (struct igmp_group *group, | |
434 | struct in_addr src_addr) | |
12e41d03 DL |
435 | { |
436 | struct igmp_source *src; | |
437 | ||
438 | if (PIM_DEBUG_IGMP_TRACE) { | |
eaa54bdb DW |
439 | char group_str[INET_ADDRSTRLEN]; |
440 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
441 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); |
442 | pim_inet4_dump("<source?>", src_addr, source_str, sizeof(source_str)); | |
443 | zlog_debug("Creating new IGMP source %s for group %s on socket %d interface %s", | |
444 | source_str, group_str, | |
445 | group->group_igmp_sock->fd, | |
9bd7302f | 446 | group->group_igmp_sock->interface->name); |
12e41d03 DL |
447 | } |
448 | ||
36d9e7dc | 449 | src = XCALLOC(MTYPE_PIM_IGMP_GROUP_SOURCE, sizeof(*src)); |
12e41d03 | 450 | if (!src) { |
36d9e7dc | 451 | zlog_warn("%s %s: XCALLOC() failure", |
12e41d03 DL |
452 | __FILE__, __PRETTY_FUNCTION__); |
453 | return 0; /* error, not found, could not create */ | |
454 | } | |
455 | ||
9bd7302f | 456 | src->t_source_timer = NULL; |
12e41d03 DL |
457 | src->source_group = group; /* back pointer */ |
458 | src->source_addr = src_addr; | |
459 | src->source_creation = pim_time_monotonic_sec(); | |
460 | src->source_flags = 0; | |
461 | src->source_query_retransmit_count = 0; | |
9bd7302f | 462 | src->source_channel_oil = NULL; |
12e41d03 DL |
463 | |
464 | listnode_add(group->group_source_list, src); | |
465 | ||
12e41d03 DL |
466 | /* Any source (*,G) is forwarded only if mode is EXCLUDE {empty} */ |
467 | igmp_anysource_forward_stop(group); | |
468 | ||
469 | return src; | |
470 | } | |
471 | ||
472 | static struct igmp_source *add_source_by_addr(struct igmp_sock *igmp, | |
473 | struct igmp_group *group, | |
9bd7302f | 474 | struct in_addr src_addr) |
12e41d03 DL |
475 | { |
476 | struct igmp_source *src; | |
477 | ||
478 | src = igmp_find_source_by_addr(group, src_addr); | |
479 | if (src) { | |
480 | return src; | |
481 | } | |
482 | ||
9bd7302f | 483 | src = source_new(group, src_addr); |
12e41d03 DL |
484 | if (!src) { |
485 | return 0; | |
486 | } | |
487 | ||
488 | return src; | |
489 | } | |
490 | ||
491 | static void allow(struct igmp_sock *igmp, struct in_addr from, | |
492 | struct in_addr group_addr, | |
493 | int num_sources, struct in_addr *sources) | |
494 | { | |
60b1960f | 495 | struct igmp_source *source; |
12e41d03 DL |
496 | struct igmp_group *group; |
497 | int i; | |
498 | ||
499 | /* non-existant group is created as INCLUDE {empty} */ | |
915c13b3 | 500 | group = igmp_add_group_by_addr(igmp, group_addr); |
12e41d03 DL |
501 | if (!group) { |
502 | return; | |
503 | } | |
504 | ||
505 | /* scan received sources */ | |
506 | for (i = 0; i < num_sources; ++i) { | |
12e41d03 DL |
507 | struct in_addr *src_addr; |
508 | ||
509 | src_addr = sources + i; | |
510 | ||
9bd7302f | 511 | source = add_source_by_addr(igmp, group, *src_addr); |
12e41d03 DL |
512 | if (!source) { |
513 | continue; | |
514 | } | |
515 | ||
516 | /* | |
517 | RFC 3376: 6.4.1. Reception of Current-State Records | |
518 | ||
519 | When receiving IS_IN reports for groups in EXCLUDE mode is | |
520 | sources should be moved from set with (timers = 0) to set with | |
521 | (timers > 0). | |
522 | ||
523 | igmp_source_reset_gmi() below, resetting the source timers to | |
524 | GMI, accomplishes this. | |
525 | */ | |
526 | igmp_source_reset_gmi(igmp, group, source); | |
527 | ||
528 | } /* scan received sources */ | |
60b1960f DS |
529 | |
530 | if ((num_sources == 0) && | |
531 | (group->group_filtermode_isexcl) && | |
532 | (listcount (group->group_source_list) == 1)) | |
533 | { | |
534 | struct in_addr star = { .s_addr = INADDR_ANY }; | |
535 | ||
536 | source = igmp_find_source_by_addr (group, star); | |
537 | if (source) | |
538 | igmp_source_reset_gmi (igmp, group, source); | |
539 | } | |
12e41d03 DL |
540 | } |
541 | ||
542 | void igmpv3_report_isin(struct igmp_sock *igmp, struct in_addr from, | |
543 | struct in_addr group_addr, | |
544 | int num_sources, struct in_addr *sources) | |
545 | { | |
546 | on_trace(__PRETTY_FUNCTION__, | |
547 | igmp->interface, from, group_addr, num_sources, sources); | |
548 | ||
549 | allow(igmp, from, group_addr, num_sources, sources); | |
550 | } | |
551 | ||
552 | static void isex_excl(struct igmp_group *group, | |
553 | int num_sources, struct in_addr *sources) | |
554 | { | |
539fba1a | 555 | struct igmp_source *source; |
12e41d03 DL |
556 | int i; |
557 | ||
558 | /* EXCLUDE mode */ | |
559 | zassert(group->group_filtermode_isexcl); | |
560 | ||
561 | /* E.1: set deletion flag for known sources (X,Y) */ | |
d2ccd60b | 562 | source_mark_delete_flag (group); |
12e41d03 DL |
563 | |
564 | /* scan received sources (A) */ | |
565 | for (i = 0; i < num_sources; ++i) { | |
12e41d03 DL |
566 | struct in_addr *src_addr; |
567 | ||
568 | src_addr = sources + i; | |
569 | ||
570 | /* E.2: lookup reported source from (A) in (X,Y) */ | |
571 | source = igmp_find_source_by_addr(group, *src_addr); | |
572 | if (source) { | |
573 | /* E.3: if found, clear deletion flag: (X*A) or (Y*A) */ | |
574 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
575 | } | |
576 | else { | |
577 | /* E.4: if not found, create source with timer=GMI: (A-X-Y) */ | |
9bd7302f | 578 | source = source_new(group, *src_addr); |
12e41d03 DL |
579 | if (!source) { |
580 | /* ugh, internal malloc failure, skip source */ | |
581 | continue; | |
582 | } | |
583 | zassert(!source->t_source_timer); /* timer == 0 */ | |
584 | igmp_source_reset_gmi(group->group_igmp_sock, group, source); | |
585 | zassert(source->t_source_timer); /* (A-X-Y) timer > 0 */ | |
586 | } | |
587 | ||
588 | } /* scan received sources */ | |
589 | ||
539fba1a DS |
590 | /* |
591 | * If we are in isexcl mode and num_sources == 0 | |
592 | * than that means we have a *,g entry that | |
593 | * needs to be handled | |
594 | */ | |
595 | if (group->group_filtermode_isexcl && num_sources == 0) | |
596 | { | |
597 | struct in_addr star = { .s_addr = INADDR_ANY }; | |
598 | source = igmp_find_source_by_addr (group, star); | |
599 | if (source) | |
0bc327f7 DS |
600 | { |
601 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
602 | igmp_source_reset_gmi (group->group_igmp_sock, group, source); | |
603 | } | |
539fba1a DS |
604 | } |
605 | ||
12e41d03 DL |
606 | /* E.5: delete all sources marked with deletion flag: (X-A) and (Y-A) */ |
607 | source_delete_by_flag(group->group_source_list); | |
608 | } | |
609 | ||
610 | static void isex_incl(struct igmp_group *group, | |
611 | int num_sources, struct in_addr *sources) | |
612 | { | |
613 | int i; | |
614 | ||
615 | /* INCLUDE mode */ | |
616 | zassert(!group->group_filtermode_isexcl); | |
617 | ||
618 | /* I.1: set deletion flag for known sources (A) */ | |
d2ccd60b | 619 | source_mark_delete_flag (group); |
12e41d03 DL |
620 | |
621 | /* scan received sources (B) */ | |
622 | for (i = 0; i < num_sources; ++i) { | |
623 | struct igmp_source *source; | |
624 | struct in_addr *src_addr; | |
625 | ||
626 | src_addr = sources + i; | |
627 | ||
628 | /* I.2: lookup reported source (B) */ | |
629 | source = igmp_find_source_by_addr(group, *src_addr); | |
630 | if (source) { | |
631 | /* I.3: if found, clear deletion flag (A*B) */ | |
632 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
633 | } | |
634 | else { | |
635 | /* I.4: if not found, create source with timer=0 (B-A) */ | |
9bd7302f | 636 | source = source_new(group, *src_addr); |
12e41d03 DL |
637 | if (!source) { |
638 | /* ugh, internal malloc failure, skip source */ | |
639 | continue; | |
640 | } | |
641 | zassert(!source->t_source_timer); /* (B-A) timer=0 */ | |
642 | } | |
643 | ||
644 | } /* scan received sources */ | |
645 | ||
646 | /* I.5: delete all sources marked with deletion flag (A-B) */ | |
647 | source_delete_by_flag(group->group_source_list); | |
648 | ||
649 | group->group_filtermode_isexcl = 1; /* boolean=true */ | |
650 | ||
651 | zassert(group->group_filtermode_isexcl); | |
652 | ||
653 | group_exclude_fwd_anysrc_ifempty(group); | |
654 | } | |
655 | ||
656 | void igmpv3_report_isex(struct igmp_sock *igmp, struct in_addr from, | |
657 | struct in_addr group_addr, | |
b05b72e8 DW |
658 | int num_sources, struct in_addr *sources, |
659 | int from_igmp_v2_report) | |
12e41d03 DL |
660 | { |
661 | struct interface *ifp = igmp->interface; | |
662 | struct igmp_group *group; | |
663 | ||
664 | on_trace(__PRETTY_FUNCTION__, | |
665 | ifp, from, group_addr, num_sources, sources); | |
666 | ||
667 | /* non-existant group is created as INCLUDE {empty} */ | |
915c13b3 | 668 | group = igmp_add_group_by_addr(igmp, group_addr); |
12e41d03 DL |
669 | if (!group) { |
670 | return; | |
671 | } | |
672 | ||
b05b72e8 DW |
673 | /* So we can display how we learned the group in our show command output */ |
674 | if (from_igmp_v2_report) | |
675 | group->igmp_version = 2; | |
676 | ||
12e41d03 DL |
677 | if (group->group_filtermode_isexcl) { |
678 | /* EXCLUDE mode */ | |
679 | isex_excl(group, num_sources, sources); | |
680 | } | |
681 | else { | |
682 | /* INCLUDE mode */ | |
683 | isex_incl(group, num_sources, sources); | |
684 | zassert(group->group_filtermode_isexcl); | |
685 | } | |
686 | ||
687 | zassert(group->group_filtermode_isexcl); | |
688 | ||
689 | igmp_group_reset_gmi(group); | |
690 | } | |
691 | ||
692 | static void toin_incl(struct igmp_group *group, | |
693 | int num_sources, struct in_addr *sources) | |
694 | { | |
695 | struct igmp_sock *igmp = group->group_igmp_sock; | |
696 | int num_sources_tosend = listcount(group->group_source_list); | |
697 | int i; | |
698 | ||
699 | /* Set SEND flag for all known sources (A) */ | |
d2ccd60b | 700 | source_mark_send_flag (group); |
12e41d03 DL |
701 | |
702 | /* Scan received sources (B) */ | |
703 | for (i = 0; i < num_sources; ++i) { | |
704 | struct igmp_source *source; | |
705 | struct in_addr *src_addr; | |
706 | ||
707 | src_addr = sources + i; | |
708 | ||
709 | /* Lookup reported source (B) */ | |
710 | source = igmp_find_source_by_addr(group, *src_addr); | |
711 | if (source) { | |
712 | /* If found, clear SEND flag (A*B) */ | |
713 | IGMP_SOURCE_DONT_SEND(source->source_flags); | |
714 | --num_sources_tosend; | |
715 | } | |
716 | else { | |
717 | /* If not found, create new source */ | |
9bd7302f | 718 | source = source_new(group, *src_addr); |
12e41d03 DL |
719 | if (!source) { |
720 | /* ugh, internal malloc failure, skip source */ | |
721 | continue; | |
722 | } | |
723 | } | |
724 | ||
725 | /* (B)=GMI */ | |
726 | igmp_source_reset_gmi(igmp, group, source); | |
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 | } | |
733 | } | |
734 | ||
735 | static void toin_excl(struct igmp_group *group, | |
736 | int num_sources, struct in_addr *sources) | |
737 | { | |
738 | struct igmp_sock *igmp = group->group_igmp_sock; | |
739 | int num_sources_tosend; | |
740 | int i; | |
741 | ||
742 | /* Set SEND flag for X (sources with timer > 0) */ | |
d2ccd60b | 743 | num_sources_tosend = source_mark_send_flag_by_timer (group); |
12e41d03 DL |
744 | |
745 | /* Scan received sources (A) */ | |
746 | for (i = 0; i < num_sources; ++i) { | |
747 | struct igmp_source *source; | |
748 | struct in_addr *src_addr; | |
749 | ||
750 | src_addr = sources + i; | |
751 | ||
752 | /* Lookup reported source (A) */ | |
753 | source = igmp_find_source_by_addr(group, *src_addr); | |
754 | if (source) { | |
755 | if (source->t_source_timer) { | |
756 | /* If found and timer running, clear SEND flag (X*A) */ | |
757 | IGMP_SOURCE_DONT_SEND(source->source_flags); | |
758 | --num_sources_tosend; | |
759 | } | |
760 | } | |
761 | else { | |
762 | /* If not found, create new source */ | |
9bd7302f | 763 | source = source_new(group, *src_addr); |
12e41d03 DL |
764 | if (!source) { |
765 | /* ugh, internal malloc failure, skip source */ | |
766 | continue; | |
767 | } | |
768 | } | |
769 | ||
770 | /* (A)=GMI */ | |
771 | igmp_source_reset_gmi(igmp, group, source); | |
772 | } | |
773 | ||
774 | /* Send sources marked with SEND flag: Q(G,X-A) */ | |
775 | if (num_sources_tosend > 0) { | |
776 | source_query_send_by_flag(group, num_sources_tosend); | |
777 | } | |
778 | ||
779 | /* Send Q(G) */ | |
780 | group_query_send(group); | |
781 | } | |
782 | ||
783 | void igmpv3_report_toin(struct igmp_sock *igmp, struct in_addr from, | |
784 | struct in_addr group_addr, | |
785 | int num_sources, struct in_addr *sources) | |
786 | { | |
787 | struct interface *ifp = igmp->interface; | |
788 | struct igmp_group *group; | |
789 | ||
790 | on_trace(__PRETTY_FUNCTION__, | |
791 | ifp, from, group_addr, num_sources, sources); | |
792 | ||
5b1207f7 DS |
793 | /* |
794 | * If the requested filter mode is INCLUDE *and* the requested source | |
795 | * list is empty, then the entry corresponding to the requested | |
796 | * interface and multicast address is deleted if present. If no such | |
797 | * entry is present, the request is ignored. | |
798 | */ | |
799 | if (num_sources) | |
800 | { | |
801 | /* non-existant group is created as INCLUDE {empty} */ | |
802 | group = igmp_add_group_by_addr(igmp, group_addr); | |
803 | if (!group) { | |
804 | return; | |
805 | } | |
806 | } | |
807 | else | |
808 | { | |
809 | group = find_group_by_addr (igmp, group_addr); | |
810 | if (!group) | |
811 | return; | |
812 | } | |
12e41d03 DL |
813 | |
814 | if (group->group_filtermode_isexcl) { | |
815 | /* EXCLUDE mode */ | |
816 | toin_excl(group, num_sources, sources); | |
817 | } | |
818 | else { | |
819 | /* INCLUDE mode */ | |
820 | toin_incl(group, num_sources, sources); | |
821 | } | |
822 | } | |
823 | ||
824 | static void toex_incl(struct igmp_group *group, | |
825 | int num_sources, struct in_addr *sources) | |
826 | { | |
827 | int num_sources_tosend = 0; | |
828 | int i; | |
829 | ||
830 | zassert(!group->group_filtermode_isexcl); | |
831 | ||
832 | /* Set DELETE flag for all known sources (A) */ | |
d2ccd60b | 833 | source_mark_delete_flag (group); |
12e41d03 DL |
834 | |
835 | /* Clear off SEND flag from all known sources (A) */ | |
836 | source_clear_send_flag(group->group_source_list); | |
837 | ||
838 | /* Scan received sources (B) */ | |
839 | for (i = 0; i < num_sources; ++i) { | |
840 | struct igmp_source *source; | |
841 | struct in_addr *src_addr; | |
842 | ||
843 | src_addr = sources + i; | |
844 | ||
845 | /* Lookup reported source (B) */ | |
846 | source = igmp_find_source_by_addr(group, *src_addr); | |
847 | if (source) { | |
848 | /* If found, clear deletion flag: (A*B) */ | |
849 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
850 | /* and set SEND flag (A*B) */ | |
851 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
852 | ++num_sources_tosend; | |
853 | } | |
854 | else { | |
855 | /* If source not found, create source with timer=0: (B-A)=0 */ | |
9bd7302f | 856 | source = source_new(group, *src_addr); |
12e41d03 DL |
857 | if (!source) { |
858 | /* ugh, internal malloc failure, skip source */ | |
859 | continue; | |
860 | } | |
861 | zassert(!source->t_source_timer); /* (B-A) timer=0 */ | |
862 | } | |
863 | ||
864 | } /* Scan received sources (B) */ | |
865 | ||
866 | group->group_filtermode_isexcl = 1; /* boolean=true */ | |
867 | ||
868 | /* Delete all sources marked with DELETE flag (A-B) */ | |
869 | source_delete_by_flag(group->group_source_list); | |
870 | ||
871 | /* Send sources marked with SEND flag: Q(G,A*B) */ | |
872 | if (num_sources_tosend > 0) { | |
873 | source_query_send_by_flag(group, num_sources_tosend); | |
874 | } | |
875 | ||
876 | zassert(group->group_filtermode_isexcl); | |
877 | ||
878 | group_exclude_fwd_anysrc_ifempty(group); | |
879 | } | |
880 | ||
881 | static void toex_excl(struct igmp_group *group, | |
882 | int num_sources, struct in_addr *sources) | |
883 | { | |
884 | int num_sources_tosend = 0; | |
885 | int i; | |
886 | ||
887 | /* set DELETE flag for all known sources (X,Y) */ | |
d2ccd60b | 888 | source_mark_delete_flag (group); |
12e41d03 DL |
889 | |
890 | /* clear off SEND flag from all known sources (X,Y) */ | |
891 | source_clear_send_flag(group->group_source_list); | |
892 | ||
a459fe85 DS |
893 | if (num_sources == 0) |
894 | { | |
895 | struct igmp_source *source; | |
896 | struct in_addr any = { .s_addr = INADDR_ANY }; | |
897 | ||
898 | source = igmp_find_source_by_addr (group, any); | |
899 | if (source) | |
900 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
901 | } | |
902 | ||
12e41d03 DL |
903 | /* scan received sources (A) */ |
904 | for (i = 0; i < num_sources; ++i) { | |
905 | struct igmp_source *source; | |
906 | struct in_addr *src_addr; | |
907 | ||
908 | src_addr = sources + i; | |
909 | ||
910 | /* lookup reported source (A) in known sources (X,Y) */ | |
911 | source = igmp_find_source_by_addr(group, *src_addr); | |
912 | if (source) { | |
913 | /* if found, clear off DELETE flag from reported source (A) */ | |
914 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
915 | } | |
916 | else { | |
917 | /* if not found, create source with Group Timer: (A-X-Y)=Group Timer */ | |
918 | long group_timer_msec; | |
9bd7302f | 919 | source = source_new(group, *src_addr); |
12e41d03 DL |
920 | if (!source) { |
921 | /* ugh, internal malloc failure, skip source */ | |
922 | continue; | |
923 | } | |
924 | ||
925 | zassert(!source->t_source_timer); /* timer == 0 */ | |
926 | group_timer_msec = igmp_group_timer_remain_msec(group); | |
927 | igmp_source_timer_on(group, source, group_timer_msec); | |
928 | zassert(source->t_source_timer); /* (A-X-Y) timer > 0 */ | |
929 | ||
930 | /* make sure source is created with DELETE flag unset */ | |
931 | zassert(!IGMP_SOURCE_TEST_DELETE(source->source_flags)); | |
932 | } | |
933 | ||
934 | /* make sure reported source has DELETE flag unset */ | |
935 | zassert(!IGMP_SOURCE_TEST_DELETE(source->source_flags)); | |
936 | ||
937 | if (source->t_source_timer) { | |
938 | /* if source timer>0 mark SEND flag: Q(G,A-Y) */ | |
939 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
940 | ++num_sources_tosend; | |
941 | } | |
942 | ||
943 | } /* scan received sources (A) */ | |
944 | ||
945 | /* | |
946 | delete all sources marked with DELETE flag: | |
947 | Delete (X-A) | |
948 | Delete (Y-A) | |
949 | */ | |
950 | source_delete_by_flag(group->group_source_list); | |
951 | ||
952 | /* send sources marked with SEND flag: Q(G,A-Y) */ | |
953 | if (num_sources_tosend > 0) { | |
954 | source_query_send_by_flag(group, num_sources_tosend); | |
955 | } | |
956 | } | |
957 | ||
958 | void igmpv3_report_toex(struct igmp_sock *igmp, struct in_addr from, | |
959 | struct in_addr group_addr, | |
960 | int num_sources, struct in_addr *sources) | |
961 | { | |
962 | struct interface *ifp = igmp->interface; | |
963 | struct igmp_group *group; | |
964 | ||
965 | on_trace(__PRETTY_FUNCTION__, | |
966 | ifp, from, group_addr, num_sources, sources); | |
967 | ||
968 | /* non-existant group is created as INCLUDE {empty} */ | |
915c13b3 | 969 | group = igmp_add_group_by_addr(igmp, group_addr); |
12e41d03 DL |
970 | if (!group) { |
971 | return; | |
972 | } | |
973 | ||
974 | if (group->group_filtermode_isexcl) { | |
975 | /* EXCLUDE mode */ | |
976 | toex_excl(group, num_sources, sources); | |
977 | } | |
978 | else { | |
979 | /* INCLUDE mode */ | |
980 | toex_incl(group, num_sources, sources); | |
981 | zassert(group->group_filtermode_isexcl); | |
982 | } | |
983 | zassert(group->group_filtermode_isexcl); | |
984 | ||
985 | /* Group Timer=GMI */ | |
986 | igmp_group_reset_gmi(group); | |
987 | } | |
988 | ||
989 | void igmpv3_report_allow(struct igmp_sock *igmp, struct in_addr from, | |
990 | struct in_addr group_addr, | |
991 | int num_sources, struct in_addr *sources) | |
992 | { | |
993 | on_trace(__PRETTY_FUNCTION__, | |
994 | igmp->interface, from, group_addr, num_sources, sources); | |
995 | ||
996 | allow(igmp, from, group_addr, num_sources, sources); | |
997 | } | |
998 | ||
999 | /* | |
1000 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
1001 | ||
1002 | When transmitting a group specific query, if the group timer is | |
1003 | larger than LMQT, the "Suppress Router-Side Processing" bit is set | |
1004 | in the query message. | |
1005 | */ | |
1006 | static void group_retransmit_group(struct igmp_group *group) | |
1007 | { | |
12e41d03 DL |
1008 | struct igmp_sock *igmp; |
1009 | struct pim_interface *pim_ifp; | |
1010 | long lmqc; /* Last Member Query Count */ | |
1011 | long lmqi_msec; /* Last Member Query Interval */ | |
1012 | long lmqt_msec; /* Last Member Query Time */ | |
1013 | int s_flag; | |
b05b72e8 | 1014 | int query_buf_size; |
12e41d03 DL |
1015 | |
1016 | igmp = group->group_igmp_sock; | |
1017 | pim_ifp = igmp->interface->info; | |
1018 | ||
b05b72e8 DW |
1019 | if (pim_ifp->igmp_version == 3) { |
1020 | query_buf_size = PIM_IGMP_BUFSIZE_WRITE; | |
1021 | } else { | |
1022 | query_buf_size = IGMP_V12_MSG_SIZE; | |
1023 | } | |
1024 | ||
1025 | char query_buf[query_buf_size]; | |
1026 | ||
12e41d03 DL |
1027 | lmqc = igmp->querier_robustness_variable; |
1028 | lmqi_msec = 100 * pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1029 | lmqt_msec = lmqc * lmqi_msec; | |
1030 | ||
1031 | /* | |
1032 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
1033 | ||
1034 | When transmitting a group specific query, if the group timer is | |
1035 | larger than LMQT, the "Suppress Router-Side Processing" bit is set | |
1036 | in the query message. | |
1037 | */ | |
1038 | s_flag = igmp_group_timer_remain_msec(group) > lmqt_msec; | |
1039 | ||
1040 | if (PIM_DEBUG_IGMP_TRACE) { | |
eaa54bdb | 1041 | char group_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
1042 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); |
1043 | zlog_debug("retransmit_group_specific_query: group %s on %s: s_flag=%d count=%d", | |
1044 | group_str, igmp->interface->name, s_flag, | |
1045 | group->group_specific_query_retransmit_count); | |
1046 | } | |
1047 | ||
1048 | /* | |
1049 | RFC3376: 4.1.12. IP Destination Addresses for Queries | |
1050 | ||
1051 | Group-Specific and Group-and-Source-Specific Queries are sent with | |
1052 | an IP destination address equal to the multicast address of | |
1053 | interest. | |
1054 | */ | |
1055 | ||
b05b72e8 DW |
1056 | igmp_send_query(pim_ifp->igmp_version, |
1057 | group, | |
1058 | igmp->fd, | |
1059 | igmp->interface->name, | |
1060 | query_buf, | |
1061 | sizeof(query_buf), | |
1062 | 0 /* num_sources_tosend */, | |
1063 | group->group_addr /* dst_addr */, | |
1064 | group->group_addr /* group_addr */, | |
1065 | pim_ifp->igmp_specific_query_max_response_time_dsec, | |
1066 | s_flag, | |
1067 | igmp->querier_robustness_variable, | |
1068 | igmp->querier_query_interval); | |
12e41d03 DL |
1069 | } |
1070 | ||
1071 | /* | |
1072 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific Queries | |
1073 | ||
1074 | When building a group and source specific query for a group G, two | |
1075 | separate query messages are sent for the group. The first one has | |
1076 | the "Suppress Router-Side Processing" bit set and contains all the | |
1077 | sources with retransmission state and timers greater than LMQT. The | |
1078 | second has the "Suppress Router-Side Processing" bit clear and | |
1079 | contains all the sources with retransmission state and timers lower | |
1080 | or equal to LMQT. If either of the two calculated messages does not | |
1081 | contain any sources, then its transmission is suppressed. | |
1082 | */ | |
1083 | static int group_retransmit_sources(struct igmp_group *group, | |
1084 | int send_with_sflag_set) | |
1085 | { | |
1086 | struct igmp_sock *igmp; | |
1087 | struct pim_interface *pim_ifp; | |
1088 | long lmqc; /* Last Member Query Count */ | |
1089 | long lmqi_msec; /* Last Member Query Interval */ | |
1090 | long lmqt_msec; /* Last Member Query Time */ | |
1091 | char query_buf1[PIM_IGMP_BUFSIZE_WRITE]; /* 1 = with s_flag set */ | |
1092 | char query_buf2[PIM_IGMP_BUFSIZE_WRITE]; /* 2 = with s_flag clear */ | |
1093 | int query_buf1_max_sources; | |
1094 | int query_buf2_max_sources; | |
1095 | struct in_addr *source_addr1; | |
1096 | struct in_addr *source_addr2; | |
1097 | int num_sources_tosend1; | |
1098 | int num_sources_tosend2; | |
1099 | struct listnode *src_node; | |
1100 | struct igmp_source *src; | |
1101 | int num_retransmit_sources_left = 0; | |
1102 | ||
12e41d03 DL |
1103 | source_addr1 = (struct in_addr *)(query_buf1 + IGMP_V3_SOURCES_OFFSET); |
1104 | source_addr2 = (struct in_addr *)(query_buf2 + IGMP_V3_SOURCES_OFFSET); | |
1105 | ||
1106 | igmp = group->group_igmp_sock; | |
1107 | pim_ifp = igmp->interface->info; | |
1108 | ||
1109 | lmqc = igmp->querier_robustness_variable; | |
1110 | lmqi_msec = 100 * pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1111 | lmqt_msec = lmqc * lmqi_msec; | |
1112 | ||
1113 | /* Scan all group sources */ | |
1114 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { | |
1115 | ||
1116 | /* Source has retransmission state? */ | |
1117 | if (src->source_query_retransmit_count < 1) | |
1118 | continue; | |
1119 | ||
1120 | if (--src->source_query_retransmit_count > 0) { | |
1121 | ++num_retransmit_sources_left; | |
1122 | } | |
1123 | ||
1124 | /* Copy source address into appropriate query buffer */ | |
1125 | if (igmp_source_timer_remain_msec(src) > lmqt_msec) { | |
1126 | *source_addr1 = src->source_addr; | |
1127 | ++source_addr1; | |
1128 | } | |
1129 | else { | |
1130 | *source_addr2 = src->source_addr; | |
1131 | ++source_addr2; | |
1132 | } | |
1133 | ||
1134 | } | |
1135 | ||
1136 | num_sources_tosend1 = source_addr1 - (struct in_addr *)(query_buf1 + IGMP_V3_SOURCES_OFFSET); | |
1137 | num_sources_tosend2 = source_addr2 - (struct in_addr *)(query_buf2 + IGMP_V3_SOURCES_OFFSET); | |
1138 | ||
1139 | if (PIM_DEBUG_IGMP_TRACE) { | |
eaa54bdb | 1140 | char group_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
1141 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); |
1142 | zlog_debug("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", | |
1143 | group_str, igmp->interface->name, | |
1144 | num_sources_tosend1, | |
1145 | num_sources_tosend2, | |
1146 | send_with_sflag_set, | |
1147 | num_retransmit_sources_left); | |
1148 | } | |
1149 | ||
1150 | if (num_sources_tosend1 > 0) { | |
1151 | /* | |
1152 | Send group-and-source-specific query with s_flag set and all | |
1153 | sources with timers greater than LMQT. | |
1154 | */ | |
1155 | ||
1156 | if (send_with_sflag_set) { | |
1157 | ||
1158 | query_buf1_max_sources = (sizeof(query_buf1) - IGMP_V3_SOURCES_OFFSET) >> 2; | |
1159 | if (num_sources_tosend1 > query_buf1_max_sources) { | |
eaa54bdb | 1160 | char group_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
1161 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); |
1162 | zlog_warn("%s: group %s on %s: s_flag=1 unable to fit %d sources into buf_size=%zu (max_sources=%d)", | |
1163 | __PRETTY_FUNCTION__, group_str, igmp->interface->name, | |
1164 | num_sources_tosend1, sizeof(query_buf1), query_buf1_max_sources); | |
1165 | } | |
1166 | else { | |
1167 | /* | |
1168 | RFC3376: 4.1.12. IP Destination Addresses for Queries | |
1169 | ||
1170 | Group-Specific and Group-and-Source-Specific Queries are sent with | |
1171 | an IP destination address equal to the multicast address of | |
1172 | interest. | |
1173 | */ | |
1174 | ||
b05b72e8 DW |
1175 | igmp_send_query(pim_ifp->igmp_version, |
1176 | group, | |
1177 | igmp->fd, | |
1178 | igmp->interface->name, | |
1179 | query_buf1, | |
1180 | sizeof(query_buf1), | |
1181 | num_sources_tosend1, | |
1182 | group->group_addr, | |
1183 | group->group_addr, | |
1184 | pim_ifp->igmp_specific_query_max_response_time_dsec, | |
1185 | 1 /* s_flag */, | |
1186 | igmp->querier_robustness_variable, | |
1187 | igmp->querier_query_interval); | |
12e41d03 DL |
1188 | } |
1189 | ||
1190 | } /* send_with_sflag_set */ | |
1191 | ||
1192 | } | |
1193 | ||
1194 | if (num_sources_tosend2 > 0) { | |
1195 | /* | |
1196 | Send group-and-source-specific query with s_flag clear and all | |
1197 | sources with timers lower or equal to LMQT. | |
1198 | */ | |
1199 | ||
1200 | query_buf2_max_sources = (sizeof(query_buf2) - IGMP_V3_SOURCES_OFFSET) >> 2; | |
1201 | if (num_sources_tosend2 > query_buf2_max_sources) { | |
eaa54bdb | 1202 | char group_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
1203 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); |
1204 | zlog_warn("%s: group %s on %s: s_flag=0 unable to fit %d sources into buf_size=%zu (max_sources=%d)", | |
1205 | __PRETTY_FUNCTION__, group_str, igmp->interface->name, | |
1206 | num_sources_tosend2, sizeof(query_buf2), query_buf2_max_sources); | |
1207 | } | |
1208 | else { | |
1209 | /* | |
1210 | RFC3376: 4.1.12. IP Destination Addresses for Queries | |
1211 | ||
1212 | Group-Specific and Group-and-Source-Specific Queries are sent with | |
1213 | an IP destination address equal to the multicast address of | |
1214 | interest. | |
1215 | */ | |
1216 | ||
b05b72e8 DW |
1217 | igmp_send_query(pim_ifp->igmp_version, |
1218 | group, | |
1219 | igmp->fd, | |
1220 | igmp->interface->name, | |
1221 | query_buf2, | |
1222 | sizeof(query_buf2), | |
1223 | num_sources_tosend2, | |
1224 | group->group_addr, | |
1225 | group->group_addr, | |
1226 | pim_ifp->igmp_specific_query_max_response_time_dsec, | |
1227 | 0 /* s_flag */, | |
1228 | igmp->querier_robustness_variable, | |
1229 | igmp->querier_query_interval); | |
12e41d03 DL |
1230 | } |
1231 | } | |
1232 | ||
1233 | return num_retransmit_sources_left; | |
1234 | } | |
1235 | ||
1236 | static int igmp_group_retransmit(struct thread *t) | |
1237 | { | |
1238 | struct igmp_group *group; | |
1239 | int num_retransmit_sources_left; | |
1240 | int send_with_sflag_set; /* boolean */ | |
1241 | ||
12e41d03 | 1242 | group = THREAD_ARG(t); |
12e41d03 DL |
1243 | |
1244 | if (PIM_DEBUG_IGMP_TRACE) { | |
eaa54bdb | 1245 | char group_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
1246 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); |
1247 | zlog_debug("group_retransmit_timer: group %s on %s", | |
1248 | group_str, group->group_igmp_sock->interface->name); | |
1249 | } | |
1250 | ||
1251 | /* Retransmit group-specific queries? (RFC3376: 6.6.3.1) */ | |
1252 | if (group->group_specific_query_retransmit_count > 0) { | |
1253 | ||
1254 | /* Retransmit group-specific queries (RFC3376: 6.6.3.1) */ | |
1255 | group_retransmit_group(group); | |
1256 | --group->group_specific_query_retransmit_count; | |
1257 | ||
1258 | /* | |
1259 | RFC3376: 6.6.3.2 | |
1260 | If a group specific query is scheduled to be transmitted at the | |
1261 | same time as a group and source specific query for the same group, | |
1262 | then transmission of the group and source specific message with the | |
1263 | "Suppress Router-Side Processing" bit set may be suppressed. | |
1264 | */ | |
1265 | send_with_sflag_set = 0; /* boolean=false */ | |
1266 | } | |
1267 | else { | |
1268 | send_with_sflag_set = 1; /* boolean=true */ | |
1269 | } | |
1270 | ||
1271 | /* Retransmit group-and-source-specific queries (RFC3376: 6.6.3.2) */ | |
1272 | num_retransmit_sources_left = group_retransmit_sources(group, | |
1273 | send_with_sflag_set); | |
1274 | ||
12e41d03 DL |
1275 | /* |
1276 | Keep group retransmit timer running if there is any retransmit | |
1277 | counter pending | |
1278 | */ | |
1279 | if ((num_retransmit_sources_left > 0) || | |
1280 | (group->group_specific_query_retransmit_count > 0)) { | |
1281 | group_retransmit_timer_on(group); | |
1282 | } | |
1283 | ||
1284 | return 0; | |
1285 | } | |
1286 | ||
1287 | /* | |
1288 | group_retransmit_timer_on: | |
1289 | if group retransmit timer isn't running, starts it; | |
1290 | otherwise, do nothing | |
1291 | */ | |
1292 | static void group_retransmit_timer_on(struct igmp_group *group) | |
1293 | { | |
1294 | struct igmp_sock *igmp; | |
1295 | struct pim_interface *pim_ifp; | |
1296 | long lmqi_msec; /* Last Member Query Interval */ | |
1297 | ||
1298 | /* if group retransmit timer is running, do nothing */ | |
1299 | if (group->t_group_query_retransmit_timer) { | |
1300 | return; | |
1301 | } | |
1302 | ||
1303 | igmp = group->group_igmp_sock; | |
1304 | pim_ifp = igmp->interface->info; | |
1305 | ||
1306 | lmqi_msec = 100 * pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1307 | ||
1308 | if (PIM_DEBUG_IGMP_TRACE) { | |
eaa54bdb | 1309 | char group_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
1310 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); |
1311 | zlog_debug("Scheduling %ld.%03ld sec retransmit timer for group %s on %s", | |
1312 | lmqi_msec / 1000, | |
1313 | lmqi_msec % 1000, | |
1314 | group_str, | |
1315 | igmp->interface->name); | |
1316 | } | |
1317 | ||
ffa2c898 QY |
1318 | thread_add_timer_msec(master, igmp_group_retransmit, group, lmqi_msec, |
1319 | &group->t_group_query_retransmit_timer); | |
12e41d03 DL |
1320 | } |
1321 | ||
1322 | static long igmp_group_timer_remain_msec(struct igmp_group *group) | |
1323 | { | |
1324 | return pim_time_timer_remain_msec(group->t_group_timer); | |
1325 | } | |
1326 | ||
1327 | static long igmp_source_timer_remain_msec(struct igmp_source *source) | |
1328 | { | |
1329 | return pim_time_timer_remain_msec(source->t_source_timer); | |
1330 | } | |
1331 | ||
1332 | /* | |
1333 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
1334 | */ | |
1335 | static void group_query_send(struct igmp_group *group) | |
1336 | { | |
1337 | long lmqc; /* Last Member Query Count */ | |
1338 | ||
1339 | lmqc = group->group_igmp_sock->querier_robustness_variable; | |
1340 | ||
1341 | /* lower group timer to lmqt */ | |
1342 | igmp_group_timer_lower_to_lmqt(group); | |
1343 | ||
1344 | /* reset retransmission counter */ | |
1345 | group->group_specific_query_retransmit_count = lmqc; | |
1346 | ||
1347 | /* immediately send group specific query (decrease retransmit counter by 1)*/ | |
1348 | group_retransmit_group(group); | |
1349 | ||
1350 | /* make sure group retransmit timer is running */ | |
1351 | group_retransmit_timer_on(group); | |
1352 | } | |
1353 | ||
1354 | /* | |
1355 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific Queries | |
1356 | */ | |
1357 | static void source_query_send_by_flag(struct igmp_group *group, | |
1358 | int num_sources_tosend) | |
1359 | { | |
1360 | struct igmp_sock *igmp; | |
1361 | struct pim_interface *pim_ifp; | |
1362 | struct listnode *src_node; | |
1363 | struct igmp_source *src; | |
1364 | long lmqc; /* Last Member Query Count */ | |
1365 | long lmqi_msec; /* Last Member Query Interval */ | |
1366 | long lmqt_msec; /* Last Member Query Time */ | |
1367 | ||
1368 | zassert(num_sources_tosend > 0); | |
1369 | ||
1370 | igmp = group->group_igmp_sock; | |
1371 | pim_ifp = igmp->interface->info; | |
1372 | ||
1373 | lmqc = igmp->querier_robustness_variable; | |
1374 | lmqi_msec = 100 * pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1375 | lmqt_msec = lmqc * lmqi_msec; | |
1376 | ||
1377 | /* | |
1378 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific Queries | |
1379 | ||
1380 | (...) for each of the sources in X of group G, with source timer larger | |
1381 | than LMQT: | |
1382 | o Set number of retransmissions for each source to [Last Member | |
1383 | Query Count]. | |
1384 | o Lower source timer to LMQT. | |
1385 | */ | |
1386 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { | |
1387 | if (IGMP_SOURCE_TEST_SEND(src->source_flags)) { | |
1388 | /* source "src" in X of group G */ | |
1389 | if (igmp_source_timer_remain_msec(src) > lmqt_msec) { | |
1390 | src->source_query_retransmit_count = lmqc; | |
1391 | igmp_source_timer_lower_to_lmqt(src); | |
1392 | } | |
1393 | } | |
1394 | } | |
1395 | ||
1396 | /* send group-and-source specific queries */ | |
1397 | group_retransmit_sources(group, 1 /* send_with_sflag_set=true */); | |
1398 | ||
1399 | /* make sure group retransmit timer is running */ | |
1400 | group_retransmit_timer_on(group); | |
1401 | } | |
1402 | ||
1403 | static void block_excl(struct igmp_group *group, | |
1404 | int num_sources, struct in_addr *sources) | |
1405 | { | |
1406 | int num_sources_tosend = 0; | |
1407 | int i; | |
1408 | ||
1409 | /* 1. clear off SEND flag from all known sources (X,Y) */ | |
1410 | source_clear_send_flag(group->group_source_list); | |
1411 | ||
1412 | /* 2. scan received sources (A) */ | |
1413 | for (i = 0; i < num_sources; ++i) { | |
1414 | struct igmp_source *source; | |
1415 | struct in_addr *src_addr; | |
1416 | ||
1417 | src_addr = sources + i; | |
1418 | ||
1419 | /* lookup reported source (A) in known sources (X,Y) */ | |
1420 | source = igmp_find_source_by_addr(group, *src_addr); | |
1421 | if (!source) { | |
1422 | /* 3: if not found, create source with Group Timer: (A-X-Y)=Group Timer */ | |
1423 | long group_timer_msec; | |
9bd7302f | 1424 | source = source_new(group, *src_addr); |
12e41d03 DL |
1425 | if (!source) { |
1426 | /* ugh, internal malloc failure, skip source */ | |
1427 | continue; | |
1428 | } | |
1429 | ||
1430 | zassert(!source->t_source_timer); /* timer == 0 */ | |
1431 | group_timer_msec = igmp_group_timer_remain_msec(group); | |
1432 | igmp_source_timer_on(group, source, group_timer_msec); | |
1433 | zassert(source->t_source_timer); /* (A-X-Y) timer > 0 */ | |
1434 | } | |
1435 | ||
1436 | if (source->t_source_timer) { | |
1437 | /* 4. if source timer>0 mark SEND flag: Q(G,A-Y) */ | |
1438 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
1439 | ++num_sources_tosend; | |
1440 | } | |
1441 | } | |
1442 | ||
1443 | /* 5. send sources marked with SEND flag: Q(G,A-Y) */ | |
1444 | if (num_sources_tosend > 0) { | |
1445 | source_query_send_by_flag(group, num_sources_tosend); | |
1446 | } | |
1447 | } | |
1448 | ||
1449 | static void block_incl(struct igmp_group *group, | |
1450 | int num_sources, struct in_addr *sources) | |
1451 | { | |
1452 | int num_sources_tosend = 0; | |
1453 | int i; | |
1454 | ||
1455 | /* 1. clear off SEND flag from all known sources (B) */ | |
1456 | source_clear_send_flag(group->group_source_list); | |
1457 | ||
1458 | /* 2. scan received sources (A) */ | |
1459 | for (i = 0; i < num_sources; ++i) { | |
1460 | struct igmp_source *source; | |
1461 | struct in_addr *src_addr; | |
1462 | ||
1463 | src_addr = sources + i; | |
1464 | ||
1465 | /* lookup reported source (A) in known sources (B) */ | |
1466 | source = igmp_find_source_by_addr(group, *src_addr); | |
1467 | if (source) { | |
1468 | /* 3. if found (A*B), mark SEND flag: Q(G,A*B) */ | |
1469 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
1470 | ++num_sources_tosend; | |
1471 | } | |
1472 | } | |
1473 | ||
1474 | /* 4. send sources marked with SEND flag: Q(G,A*B) */ | |
1475 | if (num_sources_tosend > 0) { | |
1476 | source_query_send_by_flag(group, num_sources_tosend); | |
1477 | } | |
1478 | } | |
1479 | ||
1480 | void igmpv3_report_block(struct igmp_sock *igmp, struct in_addr from, | |
1481 | struct in_addr group_addr, | |
1482 | int num_sources, struct in_addr *sources) | |
1483 | { | |
1484 | struct interface *ifp = igmp->interface; | |
1485 | struct igmp_group *group; | |
1486 | ||
1487 | on_trace(__PRETTY_FUNCTION__, | |
1488 | ifp, from, group_addr, num_sources, sources); | |
1489 | ||
1490 | /* non-existant group is created as INCLUDE {empty} */ | |
915c13b3 | 1491 | group = igmp_add_group_by_addr(igmp, group_addr); |
12e41d03 DL |
1492 | if (!group) { |
1493 | return; | |
1494 | } | |
1495 | ||
1496 | if (group->group_filtermode_isexcl) { | |
1497 | /* EXCLUDE mode */ | |
1498 | block_excl(group, num_sources, sources); | |
1499 | } | |
1500 | else { | |
1501 | /* INCLUDE mode */ | |
1502 | block_incl(group, num_sources, sources); | |
1503 | } | |
1504 | } | |
1505 | ||
1506 | void igmp_group_timer_lower_to_lmqt(struct igmp_group *group) | |
1507 | { | |
1508 | struct igmp_sock *igmp; | |
1509 | struct interface *ifp; | |
1510 | struct pim_interface *pim_ifp; | |
1511 | char *ifname; | |
1512 | int lmqi_dsec; /* Last Member Query Interval */ | |
1513 | int lmqc; /* Last Member Query Count */ | |
1514 | int lmqt_msec; /* Last Member Query Time */ | |
1515 | ||
1516 | /* | |
1517 | RFC 3376: 6.2.2. Definition of Group Timers | |
1518 | ||
1519 | The group timer is only used when a group is in EXCLUDE mode and | |
1520 | it represents the time for the *filter-mode* of the group to | |
1521 | expire and switch to INCLUDE mode. | |
1522 | */ | |
1523 | if (!group->group_filtermode_isexcl) { | |
1524 | return; | |
1525 | } | |
1526 | ||
1527 | igmp = group->group_igmp_sock; | |
1528 | ifp = igmp->interface; | |
1529 | pim_ifp = ifp->info; | |
1530 | ifname = ifp->name; | |
1531 | ||
1532 | lmqi_dsec = pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1533 | lmqc = igmp->querier_robustness_variable; | |
1534 | lmqt_msec = PIM_IGMP_LMQT_MSEC(lmqi_dsec, lmqc); /* lmqt_msec = (100 * lmqi_dsec) * lmqc */ | |
1535 | ||
1536 | if (PIM_DEBUG_IGMP_TRACE) { | |
eaa54bdb | 1537 | char group_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
1538 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); |
1539 | zlog_debug("%s: group %s on %s: LMQC=%d LMQI=%d dsec LMQT=%d msec", | |
1540 | __PRETTY_FUNCTION__, | |
1541 | group_str, ifname, | |
1542 | lmqc, lmqi_dsec, lmqt_msec); | |
1543 | } | |
1544 | ||
1545 | zassert(group->group_filtermode_isexcl); | |
1546 | ||
1547 | igmp_group_timer_on(group, lmqt_msec, ifname); | |
1548 | } | |
1549 | ||
1550 | void igmp_source_timer_lower_to_lmqt(struct igmp_source *source) | |
1551 | { | |
1552 | struct igmp_group *group; | |
1553 | struct igmp_sock *igmp; | |
1554 | struct interface *ifp; | |
1555 | struct pim_interface *pim_ifp; | |
1556 | char *ifname; | |
1557 | int lmqi_dsec; /* Last Member Query Interval */ | |
1558 | int lmqc; /* Last Member Query Count */ | |
1559 | int lmqt_msec; /* Last Member Query Time */ | |
1560 | ||
1561 | group = source->source_group; | |
1562 | igmp = group->group_igmp_sock; | |
1563 | ifp = igmp->interface; | |
1564 | pim_ifp = ifp->info; | |
1565 | ifname = ifp->name; | |
1566 | ||
1567 | lmqi_dsec = pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1568 | lmqc = igmp->querier_robustness_variable; | |
1569 | lmqt_msec = PIM_IGMP_LMQT_MSEC(lmqi_dsec, lmqc); /* lmqt_msec = (100 * lmqi_dsec) * lmqc */ | |
1570 | ||
1571 | if (PIM_DEBUG_IGMP_TRACE) { | |
eaa54bdb DW |
1572 | char group_str[INET_ADDRSTRLEN]; |
1573 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1574 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); |
1575 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
1576 | zlog_debug("%s: group %s source %s on %s: LMQC=%d LMQI=%d dsec LMQT=%d msec", | |
1577 | __PRETTY_FUNCTION__, | |
1578 | group_str, source_str, ifname, | |
1579 | lmqc, lmqi_dsec, lmqt_msec); | |
1580 | } | |
1581 | ||
1582 | igmp_source_timer_on(group, source, lmqt_msec); | |
1583 | } | |
1584 | ||
b05b72e8 DW |
1585 | void |
1586 | igmp_v3_send_query (struct igmp_group *group, | |
1587 | int fd, | |
1588 | const char *ifname, | |
1589 | char *query_buf, | |
1590 | int query_buf_size, | |
1591 | int num_sources, | |
1592 | struct in_addr dst_addr, | |
1593 | struct in_addr group_addr, | |
1594 | int query_max_response_time_dsec, | |
1595 | uint8_t s_flag, | |
1596 | uint8_t querier_robustness_variable, | |
1597 | uint16_t querier_query_interval) | |
12e41d03 DL |
1598 | { |
1599 | ssize_t msg_size; | |
1600 | uint8_t max_resp_code; | |
1601 | uint8_t qqic; | |
1602 | ssize_t sent; | |
1603 | struct sockaddr_in to; | |
1604 | socklen_t tolen; | |
1605 | uint16_t checksum; | |
1606 | ||
1607 | zassert(num_sources >= 0); | |
1608 | ||
1609 | msg_size = IGMP_V3_SOURCES_OFFSET + (num_sources << 2); | |
1610 | if (msg_size > query_buf_size) { | |
1611 | zlog_err("%s %s: unable to send: msg_size=%zd larger than query_buf_size=%d", | |
1612 | __FILE__, __PRETTY_FUNCTION__, | |
1613 | msg_size, query_buf_size); | |
1614 | return; | |
1615 | } | |
1616 | ||
1617 | s_flag = PIM_FORCE_BOOLEAN(s_flag); | |
1618 | zassert((s_flag == 0) || (s_flag == 1)); | |
1619 | ||
1620 | max_resp_code = igmp_msg_encode16to8(query_max_response_time_dsec); | |
1621 | qqic = igmp_msg_encode16to8(querier_query_interval); | |
1622 | ||
1623 | /* | |
1624 | RFC 3376: 4.1.6. QRV (Querier's Robustness Variable) | |
1625 | ||
1626 | If non-zero, the QRV field contains the [Robustness Variable] | |
1627 | value used by the querier, i.e., the sender of the Query. If the | |
1628 | querier's [Robustness Variable] exceeds 7, the maximum value of | |
1629 | the QRV field, the QRV is set to zero. | |
1630 | */ | |
1631 | if (querier_robustness_variable > 7) { | |
1632 | querier_robustness_variable = 0; | |
1633 | } | |
1634 | ||
1635 | query_buf[0] = PIM_IGMP_MEMBERSHIP_QUERY; | |
1636 | query_buf[1] = max_resp_code; | |
b05b72e8 | 1637 | *(uint16_t *)(query_buf + IGMP_CHECKSUM_OFFSET) = 0; /* for computing checksum */ |
12e41d03 DL |
1638 | memcpy(query_buf+4, &group_addr, sizeof(struct in_addr)); |
1639 | ||
1640 | query_buf[8] = (s_flag << 3) | querier_robustness_variable; | |
1641 | query_buf[9] = qqic; | |
1642 | *(uint16_t *)(query_buf + IGMP_V3_NUMSOURCES_OFFSET) = htons(num_sources); | |
1643 | ||
1644 | checksum = in_cksum(query_buf, msg_size); | |
b05b72e8 | 1645 | *(uint16_t *)(query_buf + IGMP_CHECKSUM_OFFSET) = checksum; |
12e41d03 DL |
1646 | |
1647 | if (PIM_DEBUG_IGMP_PACKETS) { | |
eaa54bdb DW |
1648 | char dst_str[INET_ADDRSTRLEN]; |
1649 | char group_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1650 | pim_inet4_dump("<dst?>", dst_addr, dst_str, sizeof(dst_str)); |
1651 | pim_inet4_dump("<group?>", group_addr, group_str, sizeof(group_str)); | |
b05b72e8 DW |
1652 | zlog_debug("Send IGMPv3 query to %s on %s for group %s, sources=%d msg_size=%zd s_flag=%x QRV=%u QQI=%u QQIC=%02x", |
1653 | dst_str, ifname, group_str, | |
1654 | num_sources, msg_size, s_flag, querier_robustness_variable, | |
1655 | querier_query_interval, qqic); | |
12e41d03 DL |
1656 | } |
1657 | ||
12e41d03 | 1658 | memset(&to, 0, sizeof(to)); |
12e41d03 DL |
1659 | to.sin_family = AF_INET; |
1660 | to.sin_addr = dst_addr; | |
12e41d03 DL |
1661 | tolen = sizeof(to); |
1662 | ||
59e96cda DL |
1663 | sent = sendto(fd, query_buf, msg_size, MSG_DONTWAIT, |
1664 | (struct sockaddr *)&to, tolen); | |
12e41d03 | 1665 | if (sent != (ssize_t) msg_size) { |
eaa54bdb DW |
1666 | char dst_str[INET_ADDRSTRLEN]; |
1667 | char group_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1668 | pim_inet4_dump("<dst?>", dst_addr, dst_str, sizeof(dst_str)); |
1669 | pim_inet4_dump("<group?>", group_addr, group_str, sizeof(group_str)); | |
1670 | if (sent < 0) { | |
b05b72e8 DW |
1671 | zlog_warn("Send IGMPv3 query failed due to %s on %s: group=%s msg_size=%zd: errno=%d: %s", |
1672 | dst_str, ifname, group_str, msg_size, errno, safe_strerror(errno)); | |
12e41d03 DL |
1673 | } |
1674 | else { | |
b05b72e8 DW |
1675 | zlog_warn("Send IGMPv3 query failed due to %s on %s: group=%s msg_size=%zd: sent=%zd", |
1676 | dst_str, ifname, group_str, msg_size, sent); | |
12e41d03 DL |
1677 | } |
1678 | return; | |
1679 | } | |
1680 | ||
1681 | /* | |
1682 | s_flag sanity test: s_flag must be set for general queries | |
1683 | ||
1684 | RFC 3376: 6.6.1. Timer Updates | |
1685 | ||
1686 | When a router sends or receives a query with a clear Suppress | |
1687 | Router-Side Processing flag, it must update its timers to reflect | |
1688 | the correct timeout values for the group or sources being queried. | |
1689 | ||
1690 | General queries don't trigger timer update. | |
1691 | */ | |
1692 | if (!s_flag) { | |
1693 | /* general query? */ | |
1694 | if (PIM_INADDR_IS_ANY(group_addr)) { | |
eaa54bdb DW |
1695 | char dst_str[INET_ADDRSTRLEN]; |
1696 | char group_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1697 | pim_inet4_dump("<dst?>", dst_addr, dst_str, sizeof(dst_str)); |
1698 | pim_inet4_dump("<group?>", group_addr, group_str, sizeof(group_str)); | |
1699 | zlog_warn("%s: to %s on %s: group=%s sources=%d: s_flag is clear for general query!", | |
1700 | __PRETTY_FUNCTION__, | |
1701 | dst_str, ifname, group_str, num_sources); | |
1702 | } | |
1703 | } | |
b05b72e8 DW |
1704 | } |
1705 | ||
1706 | void | |
1707 | igmp_v3_recv_query (struct igmp_sock *igmp, const char *from_str, char *igmp_msg) | |
1708 | { | |
1709 | struct interface *ifp; | |
1710 | struct pim_interface *pim_ifp; | |
1711 | struct in_addr group_addr; | |
1712 | uint8_t resv_s_qrv = 0; | |
1713 | uint8_t s_flag = 0; | |
1714 | uint8_t qrv = 0; | |
1715 | int i; | |
1716 | ||
1717 | memcpy(&group_addr, igmp_msg + 4, sizeof(struct in_addr)); | |
1718 | ifp = igmp->interface; | |
1719 | pim_ifp = ifp->info; | |
1720 | ||
1721 | /* | |
1722 | * RFC 3376: 4.1.6. QRV (Querier's Robustness Variable) | |
1723 | * | |
1724 | * Routers adopt the QRV value from the most recently received Query | |
1725 | * as their own [Robustness Variable] value, unless that most | |
1726 | * recently received QRV was zero, in which case the receivers use | |
1727 | * the default [Robustness Variable] value specified in section 8.1 | |
1728 | * or a statically configured value. | |
1729 | */ | |
1730 | resv_s_qrv = igmp_msg[8]; | |
1731 | qrv = 7 & resv_s_qrv; | |
1732 | igmp->querier_robustness_variable = qrv ? qrv : pim_ifp->igmp_default_robustness_variable; | |
1733 | ||
1734 | /* | |
1735 | * RFC 3376: 4.1.7. QQIC (Querier's Query Interval Code) | |
1736 | * | |
1737 | * Multicast routers that are not the current querier adopt the QQI | |
1738 | * value from the most recently received Query as their own [Query | |
1739 | * Interval] value, unless that most recently received QQI was zero, | |
1740 | * in which case the receiving routers use the default. | |
1741 | */ | |
1742 | if (igmp->t_other_querier_timer) { | |
1743 | /* other querier present */ | |
1744 | uint8_t qqic; | |
1745 | uint16_t qqi; | |
1746 | qqic = igmp_msg[9]; | |
1747 | qqi = igmp_msg_decode8to16(qqic); | |
1748 | igmp->querier_query_interval = qqi ? qqi : pim_ifp->igmp_default_query_interval; | |
1749 | ||
1750 | if (PIM_DEBUG_IGMP_TRACE) { | |
eaa54bdb | 1751 | char ifaddr_str[INET_ADDRSTRLEN]; |
b05b72e8 DW |
1752 | pim_inet4_dump("<ifaddr?>", igmp->ifaddr, ifaddr_str, sizeof(ifaddr_str)); |
1753 | zlog_debug("Querier %s new query interval is %s QQI=%u sec (recv QQIC=%02x from %s)", | |
1754 | ifaddr_str, | |
1755 | qqi ? "recv-non-default" : "default", | |
1756 | igmp->querier_query_interval, | |
1757 | qqic, | |
1758 | from_str); | |
1759 | } | |
1760 | } | |
1761 | ||
1762 | /* | |
1763 | * RFC 3376: 6.6.1. Timer Updates | |
1764 | * | |
1765 | * When a router sends or receives a query with a clear Suppress | |
1766 | * Router-Side Processing flag, it must update its timers to reflect | |
1767 | * the correct timeout values for the group or sources being queried. | |
1768 | * | |
1769 | * General queries don't trigger timer update. | |
1770 | */ | |
1771 | s_flag = (1 << 3) & resv_s_qrv; | |
1772 | ||
1773 | if (!s_flag) { | |
1774 | /* s_flag is clear */ | |
1775 | ||
1776 | if (PIM_INADDR_IS_ANY(group_addr)) { | |
1777 | /* this is a general query */ | |
1778 | /* log that general query should have the s_flag set */ | |
1779 | zlog_warn("General IGMP query v3 from %s on %s: Suppress Router-Side Processing flag is clear", | |
1780 | from_str, ifp->name); | |
1781 | } else { | |
1782 | struct igmp_group *group; | |
1783 | ||
1784 | /* this is a non-general query: perform timer updates */ | |
1785 | ||
1786 | group = find_group_by_addr(igmp, group_addr); | |
1787 | if (group) { | |
1788 | int recv_num_sources = ntohs(*(uint16_t *)(igmp_msg + IGMP_V3_NUMSOURCES_OFFSET)); | |
1789 | ||
1790 | /* | |
1791 | * RFC 3376: 6.6.1. Timer Updates | |
1792 | * Query Q(G,A): Source Timer for sources in A are lowered to LMQT | |
1793 | * Query Q(G): Group Timer is lowered to LMQT | |
1794 | */ | |
1795 | if (recv_num_sources < 1) { | |
1796 | /* Query Q(G): Group Timer is lowered to LMQT */ | |
1797 | ||
1798 | igmp_group_timer_lower_to_lmqt(group); | |
1799 | } else { | |
1800 | /* Query Q(G,A): Source Timer for sources in A are lowered to LMQT */ | |
1801 | ||
1802 | /* Scan sources in query and lower their timers to LMQT */ | |
1803 | struct in_addr *sources = (struct in_addr *)(igmp_msg + IGMP_V3_SOURCES_OFFSET); | |
1804 | for (i = 0; i < recv_num_sources; ++i) { | |
1805 | struct in_addr src_addr; | |
1806 | struct igmp_source *src; | |
1807 | memcpy(&src_addr, sources + i, sizeof(struct in_addr)); | |
1808 | src = igmp_find_source_by_addr(group, src_addr); | |
1809 | if (src) { | |
1810 | igmp_source_timer_lower_to_lmqt(src); | |
1811 | } | |
1812 | } | |
1813 | } | |
1814 | } else { | |
eaa54bdb | 1815 | char group_str[INET_ADDRSTRLEN]; |
b05b72e8 DW |
1816 | pim_inet4_dump("<group?>", group_addr, group_str, sizeof(group_str)); |
1817 | zlog_warn("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 */ | |
1822 | } | |
1823 | ||
1824 | int | |
1825 | igmp_v3_recv_report (struct igmp_sock *igmp, | |
1826 | struct in_addr from, const char *from_str, | |
1827 | char *igmp_msg, int igmp_msg_len) | |
1828 | { | |
1829 | uint16_t recv_checksum; | |
1830 | uint16_t checksum; | |
1831 | int num_groups; | |
1832 | uint8_t *group_record; | |
1833 | uint8_t *report_pastend = (uint8_t *) igmp_msg + igmp_msg_len; | |
1834 | struct interface *ifp = igmp->interface; | |
1835 | int i; | |
1836 | int local_ncb = 0; | |
1837 | ||
1838 | if (igmp_msg_len < IGMP_V3_MSG_MIN_SIZE) { | |
1839 | zlog_warn("Recv IGMP report v3 from %s on %s: size=%d shorter than minimum=%d", | |
1840 | from_str, ifp->name, igmp_msg_len, IGMP_V3_MSG_MIN_SIZE); | |
1841 | return -1; | |
1842 | } | |
1843 | ||
1844 | recv_checksum = *(uint16_t *) (igmp_msg + IGMP_CHECKSUM_OFFSET); | |
1845 | ||
1846 | /* for computing checksum */ | |
1847 | *(uint16_t *) (igmp_msg + IGMP_CHECKSUM_OFFSET) = 0; | |
1848 | ||
1849 | checksum = in_cksum(igmp_msg, igmp_msg_len); | |
1850 | if (checksum != recv_checksum) { | |
1851 | zlog_warn("Recv IGMP report v3 from %s on %s: checksum mismatch: received=%x computed=%x", | |
1852 | from_str, ifp->name, recv_checksum, checksum); | |
1853 | return -1; | |
1854 | } | |
1855 | ||
1856 | num_groups = ntohs(*(uint16_t *) (igmp_msg + IGMP_V3_REPORT_NUMGROUPS_OFFSET)); | |
1857 | if (num_groups < 1) { | |
1858 | zlog_warn("Recv IGMP report v3 from %s on %s: missing group records", | |
1859 | from_str, ifp->name); | |
1860 | return -1; | |
1861 | } | |
12e41d03 | 1862 | |
b05b72e8 DW |
1863 | if (PIM_DEBUG_IGMP_PACKETS) { |
1864 | zlog_debug("Recv IGMP report v3 from %s on %s: size=%d checksum=%x groups=%d", | |
1865 | from_str, ifp->name, igmp_msg_len, checksum, num_groups); | |
1866 | } | |
1867 | ||
1868 | group_record = (uint8_t *) igmp_msg + IGMP_V3_REPORT_GROUPPRECORD_OFFSET; | |
1869 | ||
1870 | /* Scan groups */ | |
1871 | for (i = 0; i < num_groups; ++i) { | |
1872 | struct in_addr rec_group; | |
1873 | uint8_t *sources; | |
1874 | uint8_t *src; | |
1875 | int rec_type; | |
1876 | int rec_auxdatalen; | |
1877 | int rec_num_sources; | |
1878 | int j; | |
1879 | struct prefix lncb; | |
1880 | struct prefix g; | |
1881 | ||
1882 | if ((group_record + IGMP_V3_GROUP_RECORD_MIN_SIZE) > report_pastend) { | |
1883 | zlog_warn("Recv IGMP report v3 from %s on %s: group record beyond report end", | |
1884 | from_str, ifp->name); | |
1885 | return -1; | |
1886 | } | |
1887 | ||
1888 | rec_type = group_record[IGMP_V3_GROUP_RECORD_TYPE_OFFSET]; | |
1889 | rec_auxdatalen = group_record[IGMP_V3_GROUP_RECORD_AUXDATALEN_OFFSET]; | |
1890 | rec_num_sources = ntohs(* (uint16_t *) (group_record + IGMP_V3_GROUP_RECORD_NUMSOURCES_OFFSET)); | |
1891 | ||
1892 | memcpy(&rec_group, group_record + IGMP_V3_GROUP_RECORD_GROUP_OFFSET, sizeof(struct in_addr)); | |
1893 | ||
1894 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1895 | zlog_debug("Recv IGMP report v3 from %s on %s: record=%d type=%d auxdatalen=%d sources=%d group=%s", | |
1896 | from_str, ifp->name, i, rec_type, rec_auxdatalen, rec_num_sources, inet_ntoa(rec_group)); | |
1897 | } | |
1898 | ||
1899 | /* Scan sources */ | |
1900 | ||
1901 | sources = group_record + IGMP_V3_GROUP_RECORD_SOURCE_OFFSET; | |
1902 | ||
1903 | for (j = 0, src = sources; j < rec_num_sources; ++j, src += 4) { | |
1904 | ||
1905 | if ((src + 4) > report_pastend) { | |
1906 | zlog_warn("Recv IGMP report v3 from %s on %s: group source beyond report end", | |
1907 | from_str, ifp->name); | |
1908 | return -1; | |
1909 | } | |
1910 | ||
1911 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1912 | char src_str[200]; | |
1913 | ||
1914 | if (!inet_ntop(AF_INET, src, src_str , sizeof(src_str))) | |
1915 | sprintf(src_str, "<source?>"); | |
1916 | ||
1917 | zlog_debug("Recv IGMP report v3 from %s on %s: record=%d group=%s source=%s", | |
1918 | from_str, ifp->name, i, inet_ntoa(rec_group), src_str); | |
1919 | } | |
1920 | } /* for (sources) */ | |
1921 | ||
1922 | ||
1923 | lncb.family = AF_INET; | |
1924 | lncb.u.prefix4.s_addr = 0x000000E0; | |
1925 | lncb.prefixlen = 24; | |
1926 | ||
1927 | g.family = AF_INET; | |
1928 | g.u.prefix4 = rec_group; | |
1929 | g.prefixlen = 32; | |
1930 | /* | |
1931 | * If we receive a igmp report with the group in 224.0.0.0/24 | |
1932 | * then we should ignore it | |
1933 | */ | |
1934 | if (prefix_match(&lncb, &g)) | |
1935 | local_ncb = 1; | |
1936 | ||
1937 | if (!local_ncb) | |
1938 | switch (rec_type) { | |
1939 | case IGMP_GRP_REC_TYPE_MODE_IS_INCLUDE: | |
1940 | igmpv3_report_isin(igmp, from, rec_group, rec_num_sources, (struct in_addr *) sources); | |
1941 | break; | |
1942 | case IGMP_GRP_REC_TYPE_MODE_IS_EXCLUDE: | |
1943 | igmpv3_report_isex(igmp, from, rec_group, rec_num_sources, (struct in_addr *) sources, 0); | |
1944 | break; | |
1945 | case IGMP_GRP_REC_TYPE_CHANGE_TO_INCLUDE_MODE: | |
1946 | igmpv3_report_toin(igmp, from, rec_group, rec_num_sources, (struct in_addr *) sources); | |
1947 | break; | |
1948 | case IGMP_GRP_REC_TYPE_CHANGE_TO_EXCLUDE_MODE: | |
1949 | igmpv3_report_toex(igmp, from, rec_group, rec_num_sources, (struct in_addr *) sources); | |
1950 | break; | |
1951 | case IGMP_GRP_REC_TYPE_ALLOW_NEW_SOURCES: | |
1952 | igmpv3_report_allow(igmp, from, rec_group, rec_num_sources, (struct in_addr *) sources); | |
1953 | break; | |
1954 | case IGMP_GRP_REC_TYPE_BLOCK_OLD_SOURCES: | |
1955 | igmpv3_report_block(igmp, from, rec_group, rec_num_sources, (struct in_addr *) sources); | |
1956 | break; | |
1957 | default: | |
1958 | zlog_warn("Recv IGMP report v3 from %s on %s: unknown record type: type=%d", | |
1959 | from_str, ifp->name, rec_type); | |
1960 | } | |
1961 | ||
1962 | group_record += 8 + (rec_num_sources << 2) + (rec_auxdatalen << 2); | |
1963 | local_ncb = 0; | |
1964 | ||
1965 | } /* for (group records) */ | |
1966 | ||
1967 | return 0; | |
12e41d03 | 1968 | } |