]>
Commit | Line | Data |
---|---|---|
12e41d03 DL |
1 | /* |
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 | |
16 | along with this program; see the file COPYING; if not, write to the | |
17 | Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, | |
18 | MA 02110-1301 USA | |
19 | ||
12e41d03 DL |
20 | */ |
21 | ||
22 | #include <zebra.h> | |
23 | #include "log.h" | |
24 | #include "memory.h" | |
744d91b3 | 25 | #include "if.h" |
12e41d03 DL |
26 | |
27 | #include "pimd.h" | |
28 | #include "pim_iface.h" | |
29 | #include "pim_igmp.h" | |
30 | #include "pim_igmpv3.h" | |
31 | #include "pim_str.h" | |
32 | #include "pim_util.h" | |
33 | #include "pim_time.h" | |
34 | #include "pim_zebra.h" | |
35 | #include "pim_oil.h" | |
36 | ||
37 | static void group_retransmit_timer_on(struct igmp_group *group); | |
38 | static long igmp_group_timer_remain_msec(struct igmp_group *group); | |
39 | static long igmp_source_timer_remain_msec(struct igmp_source *source); | |
40 | static void group_query_send(struct igmp_group *group); | |
41 | static void source_query_send_by_flag(struct igmp_group *group, | |
42 | int num_sources_tosend); | |
43 | ||
44 | static void on_trace(const char *label, | |
45 | struct interface *ifp, struct in_addr from, | |
46 | struct in_addr group_addr, | |
47 | int num_sources, struct in_addr *sources) | |
48 | { | |
49 | if (PIM_DEBUG_IGMP_TRACE) { | |
50 | char from_str[100]; | |
51 | char group_str[100]; | |
52 | ||
53 | pim_inet4_dump("<from?>", from, from_str, sizeof(from_str)); | |
54 | pim_inet4_dump("<group?>", group_addr, group_str, sizeof(group_str)); | |
55 | ||
56 | zlog_debug("%s: from %s on %s: group=%s sources=%d", | |
57 | label, from_str, ifp->name, group_str, num_sources); | |
58 | } | |
59 | } | |
60 | ||
61 | int igmp_group_compat_mode(const struct igmp_sock *igmp, | |
62 | const struct igmp_group *group) | |
63 | { | |
64 | struct pim_interface *pim_ifp; | |
65 | int64_t now_dsec; | |
66 | long older_host_present_interval_dsec; | |
67 | ||
68 | zassert(igmp); | |
69 | zassert(igmp->interface); | |
70 | zassert(igmp->interface->info); | |
71 | ||
72 | pim_ifp = igmp->interface->info; | |
73 | ||
74 | /* | |
75 | RFC 3376: 8.13. Older Host Present Interval | |
76 | ||
77 | This value MUST be ((the Robustness Variable) times (the Query | |
78 | Interval)) plus (one Query Response Interval). | |
79 | ||
80 | older_host_present_interval_dsec = \ | |
81 | igmp->querier_robustness_variable * \ | |
82 | 10 * igmp->querier_query_interval + \ | |
83 | pim_ifp->query_max_response_time_dsec; | |
84 | */ | |
85 | older_host_present_interval_dsec = | |
86 | PIM_IGMP_OHPI_DSEC(igmp->querier_robustness_variable, | |
87 | igmp->querier_query_interval, | |
88 | pim_ifp->igmp_query_max_response_time_dsec); | |
89 | ||
90 | now_dsec = pim_time_monotonic_dsec(); | |
91 | if (now_dsec < 1) { | |
92 | /* broken timer logged by pim_time_monotonic_dsec() */ | |
93 | return 3; | |
94 | } | |
95 | ||
96 | if ((now_dsec - group->last_igmp_v1_report_dsec) < older_host_present_interval_dsec) | |
97 | return 1; /* IGMPv1 */ | |
98 | ||
99 | if ((now_dsec - group->last_igmp_v2_report_dsec) < older_host_present_interval_dsec) | |
100 | return 2; /* IGMPv2 */ | |
101 | ||
102 | return 3; /* IGMPv3 */ | |
103 | } | |
104 | ||
105 | void igmp_group_reset_gmi(struct igmp_group *group) | |
106 | { | |
107 | long group_membership_interval_msec; | |
108 | struct pim_interface *pim_ifp; | |
109 | struct igmp_sock *igmp; | |
110 | struct interface *ifp; | |
111 | ||
112 | igmp = group->group_igmp_sock; | |
113 | ifp = igmp->interface; | |
114 | pim_ifp = ifp->info; | |
115 | ||
116 | /* | |
117 | RFC 3376: 8.4. Group Membership Interval | |
118 | ||
119 | The Group Membership Interval is the amount of time that must pass | |
120 | before a multicast router decides there are no more members of a | |
121 | group or a particular source on a network. | |
122 | ||
123 | This value MUST be ((the Robustness Variable) times (the Query | |
124 | Interval)) plus (one Query Response Interval). | |
125 | ||
126 | group_membership_interval_msec = querier_robustness_variable * | |
127 | (1000 * querier_query_interval) + | |
128 | 100 * query_response_interval_dsec; | |
129 | */ | |
130 | group_membership_interval_msec = | |
131 | PIM_IGMP_GMI_MSEC(igmp->querier_robustness_variable, | |
132 | igmp->querier_query_interval, | |
133 | pim_ifp->igmp_query_max_response_time_dsec); | |
134 | ||
135 | if (PIM_DEBUG_IGMP_TRACE) { | |
136 | char group_str[100]; | |
137 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
138 | zlog_debug("Resetting group %s timer to GMI=%ld.%03ld sec on %s", | |
139 | group_str, | |
140 | group_membership_interval_msec / 1000, | |
141 | group_membership_interval_msec % 1000, | |
142 | ifp->name); | |
143 | } | |
144 | ||
145 | /* | |
146 | RFC 3376: 6.2.2. Definition of Group Timers | |
147 | ||
148 | The group timer is only used when a group is in EXCLUDE mode and | |
149 | it represents the time for the *filter-mode* of the group to | |
150 | expire and switch to INCLUDE mode. | |
151 | */ | |
152 | zassert(group->group_filtermode_isexcl); | |
153 | ||
154 | igmp_group_timer_on(group, group_membership_interval_msec, ifp->name); | |
155 | } | |
156 | ||
157 | static int igmp_source_timer(struct thread *t) | |
158 | { | |
159 | struct igmp_source *source; | |
160 | struct igmp_group *group; | |
161 | ||
162 | zassert(t); | |
163 | source = THREAD_ARG(t); | |
164 | zassert(source); | |
165 | ||
166 | group = source->source_group; | |
167 | ||
168 | if (PIM_DEBUG_IGMP_TRACE) { | |
169 | char group_str[100]; | |
170 | char source_str[100]; | |
171 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
172 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
173 | zlog_debug("%s: Source timer expired for group %s source %s on %s", | |
174 | __PRETTY_FUNCTION__, | |
175 | group_str, source_str, | |
176 | group->group_igmp_sock->interface->name); | |
177 | } | |
178 | ||
179 | zassert(source->t_source_timer); | |
180 | source->t_source_timer = 0; | |
181 | ||
182 | /* | |
183 | RFC 3376: 6.3. IGMPv3 Source-Specific Forwarding Rules | |
184 | ||
185 | Group | |
186 | Filter-Mode Source Timer Value Action | |
187 | ----------- ------------------ ------ | |
188 | INCLUDE TIMER == 0 Suggest to stop forwarding | |
189 | traffic from source and | |
190 | remove source record. If | |
191 | there are no more source | |
192 | records for the group, delete | |
193 | group record. | |
194 | ||
195 | EXCLUDE TIMER == 0 Suggest to not forward | |
196 | traffic from source | |
197 | (DO NOT remove record) | |
198 | ||
199 | Source timer switched from (T > 0) to (T == 0): disable forwarding. | |
200 | */ | |
201 | ||
202 | zassert(!source->t_source_timer); | |
203 | ||
204 | if (group->group_filtermode_isexcl) { | |
205 | /* EXCLUDE mode */ | |
206 | ||
207 | igmp_source_forward_stop(source); | |
208 | } | |
209 | else { | |
210 | /* INCLUDE mode */ | |
211 | ||
212 | /* igmp_source_delete() will stop forwarding source */ | |
213 | igmp_source_delete(source); | |
214 | ||
215 | /* | |
216 | If there are no more source records for the group, delete group | |
217 | record. | |
218 | */ | |
219 | if (!listcount(group->group_source_list)) { | |
220 | igmp_group_delete_empty_include(group); | |
221 | } | |
222 | } | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | static void source_timer_off(struct igmp_group *group, | |
228 | struct igmp_source *source) | |
229 | { | |
230 | if (!source->t_source_timer) | |
231 | return; | |
232 | ||
233 | if (PIM_DEBUG_IGMP_TRACE) { | |
234 | char group_str[100]; | |
235 | char source_str[100]; | |
236 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
237 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
238 | zlog_debug("Cancelling TIMER event for group %s source %s on %s", | |
239 | group_str, source_str, | |
240 | group->group_igmp_sock->interface->name); | |
241 | } | |
242 | ||
243 | THREAD_OFF(source->t_source_timer); | |
244 | zassert(!source->t_source_timer); | |
245 | } | |
246 | ||
247 | static void igmp_source_timer_on(struct igmp_group *group, | |
248 | struct igmp_source *source, | |
249 | long interval_msec) | |
250 | { | |
251 | source_timer_off(group, source); | |
252 | ||
253 | if (PIM_DEBUG_IGMP_EVENTS) { | |
254 | char group_str[100]; | |
255 | char source_str[100]; | |
256 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
257 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
258 | zlog_debug("Scheduling %ld.%03ld sec TIMER event for group %s source %s on %s", | |
259 | interval_msec / 1000, | |
260 | interval_msec % 1000, | |
261 | group_str, source_str, | |
262 | group->group_igmp_sock->interface->name); | |
263 | } | |
264 | ||
265 | THREAD_TIMER_MSEC_ON(master, source->t_source_timer, | |
266 | igmp_source_timer, | |
267 | source, interval_msec); | |
268 | zassert(source->t_source_timer); | |
269 | ||
270 | /* | |
271 | RFC 3376: 6.3. IGMPv3 Source-Specific Forwarding Rules | |
272 | ||
273 | Source timer switched from (T == 0) to (T > 0): enable forwarding. | |
274 | */ | |
275 | igmp_source_forward_start(source); | |
276 | } | |
277 | ||
278 | void igmp_source_reset_gmi(struct igmp_sock *igmp, | |
279 | struct igmp_group *group, | |
280 | struct igmp_source *source) | |
281 | { | |
282 | long group_membership_interval_msec; | |
283 | struct pim_interface *pim_ifp; | |
284 | struct interface *ifp; | |
285 | ||
286 | ifp = igmp->interface; | |
287 | pim_ifp = ifp->info; | |
288 | ||
289 | group_membership_interval_msec = | |
290 | PIM_IGMP_GMI_MSEC(igmp->querier_robustness_variable, | |
291 | igmp->querier_query_interval, | |
292 | pim_ifp->igmp_query_max_response_time_dsec); | |
293 | ||
294 | if (PIM_DEBUG_IGMP_TRACE) { | |
295 | char group_str[100]; | |
296 | char source_str[100]; | |
297 | ||
298 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
299 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
300 | ||
301 | zlog_debug("Resetting source %s timer to GMI=%ld.%03ld sec for group %s on %s", | |
302 | source_str, | |
303 | group_membership_interval_msec / 1000, | |
304 | group_membership_interval_msec % 1000, | |
305 | group_str, | |
306 | ifp->name); | |
307 | } | |
308 | ||
309 | igmp_source_timer_on(group, source, | |
310 | group_membership_interval_msec); | |
311 | } | |
312 | ||
d2ccd60b | 313 | static void source_mark_delete_flag(struct igmp_group *group) |
12e41d03 DL |
314 | { |
315 | struct listnode *src_node; | |
316 | struct igmp_source *src; | |
317 | ||
d2ccd60b | 318 | for (ALL_LIST_ELEMENTS_RO (group->group_source_list, src_node, src)) { |
12e41d03 DL |
319 | IGMP_SOURCE_DO_DELETE(src->source_flags); |
320 | } | |
321 | } | |
322 | ||
d2ccd60b | 323 | static void source_mark_send_flag (struct igmp_group *group) |
12e41d03 DL |
324 | { |
325 | struct listnode *src_node; | |
326 | struct igmp_source *src; | |
327 | ||
d2ccd60b | 328 | for (ALL_LIST_ELEMENTS_RO (group->group_source_list, src_node, src)) { |
12e41d03 DL |
329 | IGMP_SOURCE_DO_SEND(src->source_flags); |
330 | } | |
331 | } | |
332 | ||
d2ccd60b | 333 | static int source_mark_send_flag_by_timer (struct igmp_group *group) |
12e41d03 DL |
334 | { |
335 | struct listnode *src_node; | |
336 | struct igmp_source *src; | |
337 | int num_marked_sources = 0; | |
338 | ||
d2ccd60b | 339 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { |
12e41d03 DL |
340 | /* Is source timer running? */ |
341 | if (src->t_source_timer) { | |
342 | IGMP_SOURCE_DO_SEND(src->source_flags); | |
343 | ++num_marked_sources; | |
344 | } | |
345 | else { | |
346 | IGMP_SOURCE_DONT_SEND(src->source_flags); | |
347 | } | |
348 | } | |
349 | ||
350 | return num_marked_sources; | |
351 | } | |
352 | ||
353 | static void source_clear_send_flag(struct list *source_list) | |
354 | { | |
355 | struct listnode *src_node; | |
356 | struct igmp_source *src; | |
357 | ||
358 | for (ALL_LIST_ELEMENTS_RO(source_list, src_node, src)) { | |
359 | IGMP_SOURCE_DONT_SEND(src->source_flags); | |
360 | } | |
361 | } | |
362 | ||
363 | /* | |
364 | Any source (*,G) is forwarded only if mode is EXCLUDE {empty} | |
365 | */ | |
366 | static void group_exclude_fwd_anysrc_ifempty(struct igmp_group *group) | |
367 | { | |
368 | zassert(group->group_filtermode_isexcl); | |
369 | ||
370 | if (listcount(group->group_source_list) < 1) { | |
371 | igmp_anysource_forward_start(group); | |
372 | } | |
373 | } | |
374 | ||
375 | void igmp_source_free(struct igmp_source *source) | |
376 | { | |
377 | /* make sure there is no source timer running */ | |
378 | zassert(!source->t_source_timer); | |
379 | ||
380 | XFREE(MTYPE_PIM_IGMP_GROUP_SOURCE, source); | |
381 | } | |
382 | ||
383 | static void source_channel_oil_detach(struct igmp_source *source) | |
384 | { | |
385 | if (source->source_channel_oil) { | |
386 | pim_channel_oil_del(source->source_channel_oil); | |
387 | source->source_channel_oil = 0; | |
388 | } | |
389 | } | |
390 | ||
391 | /* | |
392 | igmp_source_delete: stop fowarding, and delete the source | |
393 | igmp_source_forward_stop: stop fowarding, but keep the source | |
394 | */ | |
395 | void igmp_source_delete(struct igmp_source *source) | |
396 | { | |
397 | struct igmp_group *group; | |
398 | ||
399 | group = source->source_group; | |
400 | ||
401 | if (PIM_DEBUG_IGMP_TRACE) { | |
402 | char group_str[100]; | |
403 | char source_str[100]; | |
404 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
405 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
406 | zlog_debug("Deleting IGMP source %s for group %s from socket %d interface %s", | |
407 | source_str, group_str, | |
408 | group->group_igmp_sock->fd, | |
409 | group->group_igmp_sock->interface->name); | |
410 | } | |
411 | ||
412 | source_timer_off(group, source); | |
413 | igmp_source_forward_stop(source); | |
414 | ||
415 | /* sanity check that forwarding has been disabled */ | |
416 | if (IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
417 | char group_str[100]; | |
418 | char source_str[100]; | |
419 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
420 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
421 | zlog_warn("%s: forwarding=ON(!) IGMP source %s for group %s from socket %d interface %s", | |
422 | __PRETTY_FUNCTION__, | |
423 | source_str, group_str, | |
424 | group->group_igmp_sock->fd, | |
425 | group->group_igmp_sock->interface->name); | |
426 | /* warning only */ | |
427 | } | |
428 | ||
429 | source_channel_oil_detach(source); | |
430 | ||
431 | /* | |
432 | notice that listnode_delete() can't be moved | |
433 | into igmp_source_free() because the later is | |
434 | called by list_delete_all_node() | |
435 | */ | |
436 | listnode_delete(group->group_source_list, source); | |
437 | ||
438 | igmp_source_free(source); | |
439 | ||
440 | if (group->group_filtermode_isexcl) { | |
441 | group_exclude_fwd_anysrc_ifempty(group); | |
442 | } | |
443 | } | |
444 | ||
445 | static void source_delete_by_flag(struct list *source_list) | |
446 | { | |
447 | struct listnode *src_node; | |
448 | struct listnode *src_nextnode; | |
449 | struct igmp_source *src; | |
450 | ||
451 | for (ALL_LIST_ELEMENTS(source_list, src_node, src_nextnode, src)) | |
452 | if (IGMP_SOURCE_TEST_DELETE(src->source_flags)) | |
453 | igmp_source_delete(src); | |
454 | } | |
455 | ||
456 | void igmp_source_delete_expired(struct list *source_list) | |
457 | { | |
458 | struct listnode *src_node; | |
459 | struct listnode *src_nextnode; | |
460 | struct igmp_source *src; | |
461 | ||
462 | for (ALL_LIST_ELEMENTS(source_list, src_node, src_nextnode, src)) | |
463 | if (!src->t_source_timer) | |
464 | igmp_source_delete(src); | |
465 | } | |
466 | ||
467 | struct igmp_source *igmp_find_source_by_addr(struct igmp_group *group, | |
468 | struct in_addr src_addr) | |
469 | { | |
470 | struct listnode *src_node; | |
471 | struct igmp_source *src; | |
472 | ||
473 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) | |
474 | if (src_addr.s_addr == src->source_addr.s_addr) | |
475 | return src; | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
9bd7302f DS |
480 | struct igmp_source * |
481 | source_new (struct igmp_group *group, | |
482 | struct in_addr src_addr) | |
12e41d03 DL |
483 | { |
484 | struct igmp_source *src; | |
485 | ||
486 | if (PIM_DEBUG_IGMP_TRACE) { | |
487 | char group_str[100]; | |
488 | char source_str[100]; | |
489 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
490 | pim_inet4_dump("<source?>", src_addr, source_str, sizeof(source_str)); | |
491 | zlog_debug("Creating new IGMP source %s for group %s on socket %d interface %s", | |
492 | source_str, group_str, | |
493 | group->group_igmp_sock->fd, | |
9bd7302f | 494 | group->group_igmp_sock->interface->name); |
12e41d03 DL |
495 | } |
496 | ||
36d9e7dc | 497 | src = XCALLOC(MTYPE_PIM_IGMP_GROUP_SOURCE, sizeof(*src)); |
12e41d03 | 498 | if (!src) { |
36d9e7dc | 499 | zlog_warn("%s %s: XCALLOC() failure", |
12e41d03 DL |
500 | __FILE__, __PRETTY_FUNCTION__); |
501 | return 0; /* error, not found, could not create */ | |
502 | } | |
503 | ||
9bd7302f | 504 | src->t_source_timer = NULL; |
12e41d03 DL |
505 | src->source_group = group; /* back pointer */ |
506 | src->source_addr = src_addr; | |
507 | src->source_creation = pim_time_monotonic_sec(); | |
508 | src->source_flags = 0; | |
509 | src->source_query_retransmit_count = 0; | |
9bd7302f | 510 | src->source_channel_oil = NULL; |
12e41d03 DL |
511 | |
512 | listnode_add(group->group_source_list, src); | |
513 | ||
514 | zassert(!src->t_source_timer); /* source timer == 0 */ | |
515 | ||
516 | /* Any source (*,G) is forwarded only if mode is EXCLUDE {empty} */ | |
517 | igmp_anysource_forward_stop(group); | |
518 | ||
519 | return src; | |
520 | } | |
521 | ||
522 | static struct igmp_source *add_source_by_addr(struct igmp_sock *igmp, | |
523 | struct igmp_group *group, | |
9bd7302f | 524 | struct in_addr src_addr) |
12e41d03 DL |
525 | { |
526 | struct igmp_source *src; | |
527 | ||
528 | src = igmp_find_source_by_addr(group, src_addr); | |
529 | if (src) { | |
530 | return src; | |
531 | } | |
532 | ||
9bd7302f | 533 | src = source_new(group, src_addr); |
12e41d03 DL |
534 | if (!src) { |
535 | return 0; | |
536 | } | |
537 | ||
538 | return src; | |
539 | } | |
540 | ||
541 | static void allow(struct igmp_sock *igmp, struct in_addr from, | |
542 | struct in_addr group_addr, | |
543 | int num_sources, struct in_addr *sources) | |
544 | { | |
60b1960f | 545 | struct igmp_source *source; |
12e41d03 DL |
546 | struct igmp_group *group; |
547 | int i; | |
548 | ||
549 | /* non-existant group is created as INCLUDE {empty} */ | |
915c13b3 | 550 | group = igmp_add_group_by_addr(igmp, group_addr); |
12e41d03 DL |
551 | if (!group) { |
552 | return; | |
553 | } | |
554 | ||
555 | /* scan received sources */ | |
556 | for (i = 0; i < num_sources; ++i) { | |
12e41d03 DL |
557 | struct in_addr *src_addr; |
558 | ||
559 | src_addr = sources + i; | |
560 | ||
9bd7302f | 561 | source = add_source_by_addr(igmp, group, *src_addr); |
12e41d03 DL |
562 | if (!source) { |
563 | continue; | |
564 | } | |
565 | ||
566 | /* | |
567 | RFC 3376: 6.4.1. Reception of Current-State Records | |
568 | ||
569 | When receiving IS_IN reports for groups in EXCLUDE mode is | |
570 | sources should be moved from set with (timers = 0) to set with | |
571 | (timers > 0). | |
572 | ||
573 | igmp_source_reset_gmi() below, resetting the source timers to | |
574 | GMI, accomplishes this. | |
575 | */ | |
576 | igmp_source_reset_gmi(igmp, group, source); | |
577 | ||
578 | } /* scan received sources */ | |
60b1960f DS |
579 | |
580 | if ((num_sources == 0) && | |
581 | (group->group_filtermode_isexcl) && | |
582 | (listcount (group->group_source_list) == 1)) | |
583 | { | |
584 | struct in_addr star = { .s_addr = INADDR_ANY }; | |
585 | ||
586 | source = igmp_find_source_by_addr (group, star); | |
587 | if (source) | |
588 | igmp_source_reset_gmi (igmp, group, source); | |
589 | } | |
12e41d03 DL |
590 | } |
591 | ||
592 | void igmpv3_report_isin(struct igmp_sock *igmp, struct in_addr from, | |
593 | struct in_addr group_addr, | |
594 | int num_sources, struct in_addr *sources) | |
595 | { | |
596 | on_trace(__PRETTY_FUNCTION__, | |
597 | igmp->interface, from, group_addr, num_sources, sources); | |
598 | ||
599 | allow(igmp, from, group_addr, num_sources, sources); | |
600 | } | |
601 | ||
602 | static void isex_excl(struct igmp_group *group, | |
603 | int num_sources, struct in_addr *sources) | |
604 | { | |
539fba1a | 605 | struct igmp_source *source; |
12e41d03 DL |
606 | int i; |
607 | ||
608 | /* EXCLUDE mode */ | |
609 | zassert(group->group_filtermode_isexcl); | |
610 | ||
611 | /* E.1: set deletion flag for known sources (X,Y) */ | |
d2ccd60b | 612 | source_mark_delete_flag (group); |
12e41d03 DL |
613 | |
614 | /* scan received sources (A) */ | |
615 | for (i = 0; i < num_sources; ++i) { | |
12e41d03 DL |
616 | struct in_addr *src_addr; |
617 | ||
618 | src_addr = sources + i; | |
619 | ||
620 | /* E.2: lookup reported source from (A) in (X,Y) */ | |
621 | source = igmp_find_source_by_addr(group, *src_addr); | |
622 | if (source) { | |
623 | /* E.3: if found, clear deletion flag: (X*A) or (Y*A) */ | |
624 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
625 | } | |
626 | else { | |
627 | /* E.4: if not found, create source with timer=GMI: (A-X-Y) */ | |
9bd7302f | 628 | source = source_new(group, *src_addr); |
12e41d03 DL |
629 | if (!source) { |
630 | /* ugh, internal malloc failure, skip source */ | |
631 | continue; | |
632 | } | |
633 | zassert(!source->t_source_timer); /* timer == 0 */ | |
634 | igmp_source_reset_gmi(group->group_igmp_sock, group, source); | |
635 | zassert(source->t_source_timer); /* (A-X-Y) timer > 0 */ | |
636 | } | |
637 | ||
638 | } /* scan received sources */ | |
639 | ||
539fba1a DS |
640 | /* |
641 | * If we are in isexcl mode and num_sources == 0 | |
642 | * than that means we have a *,g entry that | |
643 | * needs to be handled | |
644 | */ | |
645 | if (group->group_filtermode_isexcl && num_sources == 0) | |
646 | { | |
647 | struct in_addr star = { .s_addr = INADDR_ANY }; | |
648 | source = igmp_find_source_by_addr (group, star); | |
649 | if (source) | |
0bc327f7 DS |
650 | { |
651 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
652 | igmp_source_reset_gmi (group->group_igmp_sock, group, source); | |
653 | } | |
539fba1a DS |
654 | } |
655 | ||
12e41d03 DL |
656 | /* E.5: delete all sources marked with deletion flag: (X-A) and (Y-A) */ |
657 | source_delete_by_flag(group->group_source_list); | |
658 | } | |
659 | ||
660 | static void isex_incl(struct igmp_group *group, | |
661 | int num_sources, struct in_addr *sources) | |
662 | { | |
663 | int i; | |
664 | ||
665 | /* INCLUDE mode */ | |
666 | zassert(!group->group_filtermode_isexcl); | |
667 | ||
668 | /* I.1: set deletion flag for known sources (A) */ | |
d2ccd60b | 669 | source_mark_delete_flag (group); |
12e41d03 DL |
670 | |
671 | /* scan received sources (B) */ | |
672 | for (i = 0; i < num_sources; ++i) { | |
673 | struct igmp_source *source; | |
674 | struct in_addr *src_addr; | |
675 | ||
676 | src_addr = sources + i; | |
677 | ||
678 | /* I.2: lookup reported source (B) */ | |
679 | source = igmp_find_source_by_addr(group, *src_addr); | |
680 | if (source) { | |
681 | /* I.3: if found, clear deletion flag (A*B) */ | |
682 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
683 | } | |
684 | else { | |
685 | /* I.4: if not found, create source with timer=0 (B-A) */ | |
9bd7302f | 686 | source = source_new(group, *src_addr); |
12e41d03 DL |
687 | if (!source) { |
688 | /* ugh, internal malloc failure, skip source */ | |
689 | continue; | |
690 | } | |
691 | zassert(!source->t_source_timer); /* (B-A) timer=0 */ | |
692 | } | |
693 | ||
694 | } /* scan received sources */ | |
695 | ||
696 | /* I.5: delete all sources marked with deletion flag (A-B) */ | |
697 | source_delete_by_flag(group->group_source_list); | |
698 | ||
699 | group->group_filtermode_isexcl = 1; /* boolean=true */ | |
700 | ||
701 | zassert(group->group_filtermode_isexcl); | |
702 | ||
703 | group_exclude_fwd_anysrc_ifempty(group); | |
704 | } | |
705 | ||
706 | void igmpv3_report_isex(struct igmp_sock *igmp, struct in_addr from, | |
707 | struct in_addr group_addr, | |
708 | int num_sources, struct in_addr *sources) | |
709 | { | |
710 | struct interface *ifp = igmp->interface; | |
711 | struct igmp_group *group; | |
712 | ||
713 | on_trace(__PRETTY_FUNCTION__, | |
714 | ifp, from, group_addr, num_sources, sources); | |
715 | ||
716 | /* non-existant group is created as INCLUDE {empty} */ | |
915c13b3 | 717 | group = igmp_add_group_by_addr(igmp, group_addr); |
12e41d03 DL |
718 | if (!group) { |
719 | return; | |
720 | } | |
721 | ||
722 | if (group->group_filtermode_isexcl) { | |
723 | /* EXCLUDE mode */ | |
724 | isex_excl(group, num_sources, sources); | |
725 | } | |
726 | else { | |
727 | /* INCLUDE mode */ | |
728 | isex_incl(group, num_sources, sources); | |
729 | zassert(group->group_filtermode_isexcl); | |
730 | } | |
731 | ||
732 | zassert(group->group_filtermode_isexcl); | |
733 | ||
734 | igmp_group_reset_gmi(group); | |
735 | } | |
736 | ||
737 | static void toin_incl(struct igmp_group *group, | |
738 | int num_sources, struct in_addr *sources) | |
739 | { | |
740 | struct igmp_sock *igmp = group->group_igmp_sock; | |
741 | int num_sources_tosend = listcount(group->group_source_list); | |
742 | int i; | |
743 | ||
744 | /* Set SEND flag for all known sources (A) */ | |
d2ccd60b | 745 | source_mark_send_flag (group); |
12e41d03 DL |
746 | |
747 | /* Scan received sources (B) */ | |
748 | for (i = 0; i < num_sources; ++i) { | |
749 | struct igmp_source *source; | |
750 | struct in_addr *src_addr; | |
751 | ||
752 | src_addr = sources + i; | |
753 | ||
754 | /* Lookup reported source (B) */ | |
755 | source = igmp_find_source_by_addr(group, *src_addr); | |
756 | if (source) { | |
757 | /* If found, clear SEND flag (A*B) */ | |
758 | IGMP_SOURCE_DONT_SEND(source->source_flags); | |
759 | --num_sources_tosend; | |
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 | /* (B)=GMI */ | |
771 | igmp_source_reset_gmi(igmp, group, source); | |
772 | } | |
773 | ||
774 | /* Send sources marked with SEND flag: Q(G,A-B) */ | |
775 | if (num_sources_tosend > 0) { | |
776 | source_query_send_by_flag(group, num_sources_tosend); | |
777 | } | |
778 | } | |
779 | ||
780 | static void toin_excl(struct igmp_group *group, | |
781 | int num_sources, struct in_addr *sources) | |
782 | { | |
783 | struct igmp_sock *igmp = group->group_igmp_sock; | |
784 | int num_sources_tosend; | |
785 | int i; | |
786 | ||
787 | /* Set SEND flag for X (sources with timer > 0) */ | |
d2ccd60b | 788 | num_sources_tosend = source_mark_send_flag_by_timer (group); |
12e41d03 DL |
789 | |
790 | /* Scan received sources (A) */ | |
791 | for (i = 0; i < num_sources; ++i) { | |
792 | struct igmp_source *source; | |
793 | struct in_addr *src_addr; | |
794 | ||
795 | src_addr = sources + i; | |
796 | ||
797 | /* Lookup reported source (A) */ | |
798 | source = igmp_find_source_by_addr(group, *src_addr); | |
799 | if (source) { | |
800 | if (source->t_source_timer) { | |
801 | /* If found and timer running, clear SEND flag (X*A) */ | |
802 | IGMP_SOURCE_DONT_SEND(source->source_flags); | |
803 | --num_sources_tosend; | |
804 | } | |
805 | } | |
806 | else { | |
807 | /* If not found, create new source */ | |
9bd7302f | 808 | source = source_new(group, *src_addr); |
12e41d03 DL |
809 | if (!source) { |
810 | /* ugh, internal malloc failure, skip source */ | |
811 | continue; | |
812 | } | |
813 | } | |
814 | ||
815 | /* (A)=GMI */ | |
816 | igmp_source_reset_gmi(igmp, group, source); | |
817 | } | |
818 | ||
819 | /* Send sources marked with SEND flag: Q(G,X-A) */ | |
820 | if (num_sources_tosend > 0) { | |
821 | source_query_send_by_flag(group, num_sources_tosend); | |
822 | } | |
823 | ||
824 | /* Send Q(G) */ | |
825 | group_query_send(group); | |
826 | } | |
827 | ||
828 | void igmpv3_report_toin(struct igmp_sock *igmp, struct in_addr from, | |
829 | struct in_addr group_addr, | |
830 | int num_sources, struct in_addr *sources) | |
831 | { | |
832 | struct interface *ifp = igmp->interface; | |
833 | struct igmp_group *group; | |
834 | ||
835 | on_trace(__PRETTY_FUNCTION__, | |
836 | ifp, from, group_addr, num_sources, sources); | |
837 | ||
5b1207f7 DS |
838 | /* |
839 | * If the requested filter mode is INCLUDE *and* the requested source | |
840 | * list is empty, then the entry corresponding to the requested | |
841 | * interface and multicast address is deleted if present. If no such | |
842 | * entry is present, the request is ignored. | |
843 | */ | |
844 | if (num_sources) | |
845 | { | |
846 | /* non-existant group is created as INCLUDE {empty} */ | |
847 | group = igmp_add_group_by_addr(igmp, group_addr); | |
848 | if (!group) { | |
849 | return; | |
850 | } | |
851 | } | |
852 | else | |
853 | { | |
854 | group = find_group_by_addr (igmp, group_addr); | |
855 | if (!group) | |
856 | return; | |
857 | } | |
12e41d03 DL |
858 | |
859 | if (group->group_filtermode_isexcl) { | |
860 | /* EXCLUDE mode */ | |
861 | toin_excl(group, num_sources, sources); | |
862 | } | |
863 | else { | |
864 | /* INCLUDE mode */ | |
865 | toin_incl(group, num_sources, sources); | |
866 | } | |
867 | } | |
868 | ||
869 | static void toex_incl(struct igmp_group *group, | |
870 | int num_sources, struct in_addr *sources) | |
871 | { | |
872 | int num_sources_tosend = 0; | |
873 | int i; | |
874 | ||
875 | zassert(!group->group_filtermode_isexcl); | |
876 | ||
877 | /* Set DELETE flag for all known sources (A) */ | |
d2ccd60b | 878 | source_mark_delete_flag (group); |
12e41d03 DL |
879 | |
880 | /* Clear off SEND flag from all known sources (A) */ | |
881 | source_clear_send_flag(group->group_source_list); | |
882 | ||
883 | /* Scan received sources (B) */ | |
884 | for (i = 0; i < num_sources; ++i) { | |
885 | struct igmp_source *source; | |
886 | struct in_addr *src_addr; | |
887 | ||
888 | src_addr = sources + i; | |
889 | ||
890 | /* Lookup reported source (B) */ | |
891 | source = igmp_find_source_by_addr(group, *src_addr); | |
892 | if (source) { | |
893 | /* If found, clear deletion flag: (A*B) */ | |
894 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
895 | /* and set SEND flag (A*B) */ | |
896 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
897 | ++num_sources_tosend; | |
898 | } | |
899 | else { | |
900 | /* If source not found, create source with timer=0: (B-A)=0 */ | |
9bd7302f | 901 | source = source_new(group, *src_addr); |
12e41d03 DL |
902 | if (!source) { |
903 | /* ugh, internal malloc failure, skip source */ | |
904 | continue; | |
905 | } | |
906 | zassert(!source->t_source_timer); /* (B-A) timer=0 */ | |
907 | } | |
908 | ||
909 | } /* Scan received sources (B) */ | |
910 | ||
911 | group->group_filtermode_isexcl = 1; /* boolean=true */ | |
912 | ||
913 | /* Delete all sources marked with DELETE flag (A-B) */ | |
914 | source_delete_by_flag(group->group_source_list); | |
915 | ||
916 | /* Send sources marked with SEND flag: Q(G,A*B) */ | |
917 | if (num_sources_tosend > 0) { | |
918 | source_query_send_by_flag(group, num_sources_tosend); | |
919 | } | |
920 | ||
921 | zassert(group->group_filtermode_isexcl); | |
922 | ||
923 | group_exclude_fwd_anysrc_ifempty(group); | |
924 | } | |
925 | ||
926 | static void toex_excl(struct igmp_group *group, | |
927 | int num_sources, struct in_addr *sources) | |
928 | { | |
929 | int num_sources_tosend = 0; | |
930 | int i; | |
931 | ||
932 | /* set DELETE flag for all known sources (X,Y) */ | |
d2ccd60b | 933 | source_mark_delete_flag (group); |
12e41d03 DL |
934 | |
935 | /* clear off SEND flag from all known sources (X,Y) */ | |
936 | source_clear_send_flag(group->group_source_list); | |
937 | ||
a459fe85 DS |
938 | if (num_sources == 0) |
939 | { | |
940 | struct igmp_source *source; | |
941 | struct in_addr any = { .s_addr = INADDR_ANY }; | |
942 | ||
943 | source = igmp_find_source_by_addr (group, any); | |
944 | if (source) | |
945 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
946 | } | |
947 | ||
12e41d03 DL |
948 | /* scan received sources (A) */ |
949 | for (i = 0; i < num_sources; ++i) { | |
950 | struct igmp_source *source; | |
951 | struct in_addr *src_addr; | |
952 | ||
953 | src_addr = sources + i; | |
954 | ||
955 | /* lookup reported source (A) in known sources (X,Y) */ | |
956 | source = igmp_find_source_by_addr(group, *src_addr); | |
957 | if (source) { | |
958 | /* if found, clear off DELETE flag from reported source (A) */ | |
959 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
960 | } | |
961 | else { | |
962 | /* if not found, create source with Group Timer: (A-X-Y)=Group Timer */ | |
963 | long group_timer_msec; | |
9bd7302f | 964 | source = source_new(group, *src_addr); |
12e41d03 DL |
965 | if (!source) { |
966 | /* ugh, internal malloc failure, skip source */ | |
967 | continue; | |
968 | } | |
969 | ||
970 | zassert(!source->t_source_timer); /* timer == 0 */ | |
971 | group_timer_msec = igmp_group_timer_remain_msec(group); | |
972 | igmp_source_timer_on(group, source, group_timer_msec); | |
973 | zassert(source->t_source_timer); /* (A-X-Y) timer > 0 */ | |
974 | ||
975 | /* make sure source is created with DELETE flag unset */ | |
976 | zassert(!IGMP_SOURCE_TEST_DELETE(source->source_flags)); | |
977 | } | |
978 | ||
979 | /* make sure reported source has DELETE flag unset */ | |
980 | zassert(!IGMP_SOURCE_TEST_DELETE(source->source_flags)); | |
981 | ||
982 | if (source->t_source_timer) { | |
983 | /* if source timer>0 mark SEND flag: Q(G,A-Y) */ | |
984 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
985 | ++num_sources_tosend; | |
986 | } | |
987 | ||
988 | } /* scan received sources (A) */ | |
989 | ||
990 | /* | |
991 | delete all sources marked with DELETE flag: | |
992 | Delete (X-A) | |
993 | Delete (Y-A) | |
994 | */ | |
995 | source_delete_by_flag(group->group_source_list); | |
996 | ||
997 | /* send sources marked with SEND flag: Q(G,A-Y) */ | |
998 | if (num_sources_tosend > 0) { | |
999 | source_query_send_by_flag(group, num_sources_tosend); | |
1000 | } | |
1001 | } | |
1002 | ||
1003 | void igmpv3_report_toex(struct igmp_sock *igmp, struct in_addr from, | |
1004 | struct in_addr group_addr, | |
1005 | int num_sources, struct in_addr *sources) | |
1006 | { | |
1007 | struct interface *ifp = igmp->interface; | |
1008 | struct igmp_group *group; | |
1009 | ||
1010 | on_trace(__PRETTY_FUNCTION__, | |
1011 | ifp, from, group_addr, num_sources, sources); | |
1012 | ||
1013 | /* non-existant group is created as INCLUDE {empty} */ | |
915c13b3 | 1014 | group = igmp_add_group_by_addr(igmp, group_addr); |
12e41d03 DL |
1015 | if (!group) { |
1016 | return; | |
1017 | } | |
1018 | ||
1019 | if (group->group_filtermode_isexcl) { | |
1020 | /* EXCLUDE mode */ | |
1021 | toex_excl(group, num_sources, sources); | |
1022 | } | |
1023 | else { | |
1024 | /* INCLUDE mode */ | |
1025 | toex_incl(group, num_sources, sources); | |
1026 | zassert(group->group_filtermode_isexcl); | |
1027 | } | |
1028 | zassert(group->group_filtermode_isexcl); | |
1029 | ||
1030 | /* Group Timer=GMI */ | |
1031 | igmp_group_reset_gmi(group); | |
1032 | } | |
1033 | ||
1034 | void igmpv3_report_allow(struct igmp_sock *igmp, struct in_addr from, | |
1035 | struct in_addr group_addr, | |
1036 | int num_sources, struct in_addr *sources) | |
1037 | { | |
1038 | on_trace(__PRETTY_FUNCTION__, | |
1039 | igmp->interface, from, group_addr, num_sources, sources); | |
1040 | ||
1041 | allow(igmp, from, group_addr, num_sources, sources); | |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
1046 | ||
1047 | When transmitting a group specific query, if the group timer is | |
1048 | larger than LMQT, the "Suppress Router-Side Processing" bit is set | |
1049 | in the query message. | |
1050 | */ | |
1051 | static void group_retransmit_group(struct igmp_group *group) | |
1052 | { | |
1053 | char query_buf[PIM_IGMP_BUFSIZE_WRITE]; | |
1054 | struct igmp_sock *igmp; | |
1055 | struct pim_interface *pim_ifp; | |
1056 | long lmqc; /* Last Member Query Count */ | |
1057 | long lmqi_msec; /* Last Member Query Interval */ | |
1058 | long lmqt_msec; /* Last Member Query Time */ | |
1059 | int s_flag; | |
1060 | ||
1061 | igmp = group->group_igmp_sock; | |
1062 | pim_ifp = igmp->interface->info; | |
1063 | ||
1064 | lmqc = igmp->querier_robustness_variable; | |
1065 | lmqi_msec = 100 * pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1066 | lmqt_msec = lmqc * lmqi_msec; | |
1067 | ||
1068 | /* | |
1069 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
1070 | ||
1071 | When transmitting a group specific query, if the group timer is | |
1072 | larger than LMQT, the "Suppress Router-Side Processing" bit is set | |
1073 | in the query message. | |
1074 | */ | |
1075 | s_flag = igmp_group_timer_remain_msec(group) > lmqt_msec; | |
1076 | ||
1077 | if (PIM_DEBUG_IGMP_TRACE) { | |
1078 | char group_str[100]; | |
1079 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
1080 | zlog_debug("retransmit_group_specific_query: group %s on %s: s_flag=%d count=%d", | |
1081 | group_str, igmp->interface->name, s_flag, | |
1082 | group->group_specific_query_retransmit_count); | |
1083 | } | |
1084 | ||
1085 | /* | |
1086 | RFC3376: 4.1.12. IP Destination Addresses for Queries | |
1087 | ||
1088 | Group-Specific and Group-and-Source-Specific Queries are sent with | |
1089 | an IP destination address equal to the multicast address of | |
1090 | interest. | |
1091 | */ | |
1092 | ||
1093 | pim_igmp_send_membership_query(group, | |
1094 | igmp->fd, | |
1095 | igmp->interface->name, | |
1096 | query_buf, | |
1097 | sizeof(query_buf), | |
1098 | 0 /* num_sources_tosend */, | |
1099 | group->group_addr /* dst_addr */, | |
1100 | group->group_addr /* group_addr */, | |
1101 | pim_ifp->igmp_specific_query_max_response_time_dsec, | |
1102 | s_flag, | |
1103 | igmp->querier_robustness_variable, | |
1104 | igmp->querier_query_interval); | |
1105 | } | |
1106 | ||
1107 | /* | |
1108 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific Queries | |
1109 | ||
1110 | When building a group and source specific query for a group G, two | |
1111 | separate query messages are sent for the group. The first one has | |
1112 | the "Suppress Router-Side Processing" bit set and contains all the | |
1113 | sources with retransmission state and timers greater than LMQT. The | |
1114 | second has the "Suppress Router-Side Processing" bit clear and | |
1115 | contains all the sources with retransmission state and timers lower | |
1116 | or equal to LMQT. If either of the two calculated messages does not | |
1117 | contain any sources, then its transmission is suppressed. | |
1118 | */ | |
1119 | static int group_retransmit_sources(struct igmp_group *group, | |
1120 | int send_with_sflag_set) | |
1121 | { | |
1122 | struct igmp_sock *igmp; | |
1123 | struct pim_interface *pim_ifp; | |
1124 | long lmqc; /* Last Member Query Count */ | |
1125 | long lmqi_msec; /* Last Member Query Interval */ | |
1126 | long lmqt_msec; /* Last Member Query Time */ | |
1127 | char query_buf1[PIM_IGMP_BUFSIZE_WRITE]; /* 1 = with s_flag set */ | |
1128 | char query_buf2[PIM_IGMP_BUFSIZE_WRITE]; /* 2 = with s_flag clear */ | |
1129 | int query_buf1_max_sources; | |
1130 | int query_buf2_max_sources; | |
1131 | struct in_addr *source_addr1; | |
1132 | struct in_addr *source_addr2; | |
1133 | int num_sources_tosend1; | |
1134 | int num_sources_tosend2; | |
1135 | struct listnode *src_node; | |
1136 | struct igmp_source *src; | |
1137 | int num_retransmit_sources_left = 0; | |
1138 | ||
12e41d03 DL |
1139 | source_addr1 = (struct in_addr *)(query_buf1 + IGMP_V3_SOURCES_OFFSET); |
1140 | source_addr2 = (struct in_addr *)(query_buf2 + IGMP_V3_SOURCES_OFFSET); | |
1141 | ||
1142 | igmp = group->group_igmp_sock; | |
1143 | pim_ifp = igmp->interface->info; | |
1144 | ||
1145 | lmqc = igmp->querier_robustness_variable; | |
1146 | lmqi_msec = 100 * pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1147 | lmqt_msec = lmqc * lmqi_msec; | |
1148 | ||
1149 | /* Scan all group sources */ | |
1150 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { | |
1151 | ||
1152 | /* Source has retransmission state? */ | |
1153 | if (src->source_query_retransmit_count < 1) | |
1154 | continue; | |
1155 | ||
1156 | if (--src->source_query_retransmit_count > 0) { | |
1157 | ++num_retransmit_sources_left; | |
1158 | } | |
1159 | ||
1160 | /* Copy source address into appropriate query buffer */ | |
1161 | if (igmp_source_timer_remain_msec(src) > lmqt_msec) { | |
1162 | *source_addr1 = src->source_addr; | |
1163 | ++source_addr1; | |
1164 | } | |
1165 | else { | |
1166 | *source_addr2 = src->source_addr; | |
1167 | ++source_addr2; | |
1168 | } | |
1169 | ||
1170 | } | |
1171 | ||
1172 | num_sources_tosend1 = source_addr1 - (struct in_addr *)(query_buf1 + IGMP_V3_SOURCES_OFFSET); | |
1173 | num_sources_tosend2 = source_addr2 - (struct in_addr *)(query_buf2 + IGMP_V3_SOURCES_OFFSET); | |
1174 | ||
1175 | if (PIM_DEBUG_IGMP_TRACE) { | |
1176 | char group_str[100]; | |
1177 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
1178 | 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", | |
1179 | group_str, igmp->interface->name, | |
1180 | num_sources_tosend1, | |
1181 | num_sources_tosend2, | |
1182 | send_with_sflag_set, | |
1183 | num_retransmit_sources_left); | |
1184 | } | |
1185 | ||
1186 | if (num_sources_tosend1 > 0) { | |
1187 | /* | |
1188 | Send group-and-source-specific query with s_flag set and all | |
1189 | sources with timers greater than LMQT. | |
1190 | */ | |
1191 | ||
1192 | if (send_with_sflag_set) { | |
1193 | ||
1194 | query_buf1_max_sources = (sizeof(query_buf1) - IGMP_V3_SOURCES_OFFSET) >> 2; | |
1195 | if (num_sources_tosend1 > query_buf1_max_sources) { | |
1196 | char group_str[100]; | |
1197 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
1198 | zlog_warn("%s: group %s on %s: s_flag=1 unable to fit %d sources into buf_size=%zu (max_sources=%d)", | |
1199 | __PRETTY_FUNCTION__, group_str, igmp->interface->name, | |
1200 | num_sources_tosend1, sizeof(query_buf1), query_buf1_max_sources); | |
1201 | } | |
1202 | else { | |
1203 | /* | |
1204 | RFC3376: 4.1.12. IP Destination Addresses for Queries | |
1205 | ||
1206 | Group-Specific and Group-and-Source-Specific Queries are sent with | |
1207 | an IP destination address equal to the multicast address of | |
1208 | interest. | |
1209 | */ | |
1210 | ||
1211 | pim_igmp_send_membership_query(group, | |
1212 | igmp->fd, | |
1213 | igmp->interface->name, | |
1214 | query_buf1, | |
1215 | sizeof(query_buf1), | |
1216 | num_sources_tosend1, | |
1217 | group->group_addr, | |
1218 | group->group_addr, | |
1219 | pim_ifp->igmp_specific_query_max_response_time_dsec, | |
1220 | 1 /* s_flag */, | |
1221 | igmp->querier_robustness_variable, | |
1222 | igmp->querier_query_interval); | |
1223 | ||
1224 | } | |
1225 | ||
1226 | } /* send_with_sflag_set */ | |
1227 | ||
1228 | } | |
1229 | ||
1230 | if (num_sources_tosend2 > 0) { | |
1231 | /* | |
1232 | Send group-and-source-specific query with s_flag clear and all | |
1233 | sources with timers lower or equal to LMQT. | |
1234 | */ | |
1235 | ||
1236 | query_buf2_max_sources = (sizeof(query_buf2) - IGMP_V3_SOURCES_OFFSET) >> 2; | |
1237 | if (num_sources_tosend2 > query_buf2_max_sources) { | |
1238 | char group_str[100]; | |
1239 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
1240 | zlog_warn("%s: group %s on %s: s_flag=0 unable to fit %d sources into buf_size=%zu (max_sources=%d)", | |
1241 | __PRETTY_FUNCTION__, group_str, igmp->interface->name, | |
1242 | num_sources_tosend2, sizeof(query_buf2), query_buf2_max_sources); | |
1243 | } | |
1244 | else { | |
1245 | /* | |
1246 | RFC3376: 4.1.12. IP Destination Addresses for Queries | |
1247 | ||
1248 | Group-Specific and Group-and-Source-Specific Queries are sent with | |
1249 | an IP destination address equal to the multicast address of | |
1250 | interest. | |
1251 | */ | |
1252 | ||
1253 | pim_igmp_send_membership_query(group, | |
1254 | igmp->fd, | |
1255 | igmp->interface->name, | |
1256 | query_buf2, | |
1257 | sizeof(query_buf2), | |
1258 | num_sources_tosend2, | |
1259 | group->group_addr, | |
1260 | group->group_addr, | |
1261 | pim_ifp->igmp_specific_query_max_response_time_dsec, | |
1262 | 0 /* s_flag */, | |
1263 | igmp->querier_robustness_variable, | |
1264 | igmp->querier_query_interval); | |
1265 | ||
1266 | } | |
1267 | } | |
1268 | ||
1269 | return num_retransmit_sources_left; | |
1270 | } | |
1271 | ||
1272 | static int igmp_group_retransmit(struct thread *t) | |
1273 | { | |
1274 | struct igmp_group *group; | |
1275 | int num_retransmit_sources_left; | |
1276 | int send_with_sflag_set; /* boolean */ | |
1277 | ||
1278 | zassert(t); | |
1279 | group = THREAD_ARG(t); | |
1280 | zassert(group); | |
1281 | ||
1282 | if (PIM_DEBUG_IGMP_TRACE) { | |
1283 | char group_str[100]; | |
1284 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
1285 | zlog_debug("group_retransmit_timer: group %s on %s", | |
1286 | group_str, group->group_igmp_sock->interface->name); | |
1287 | } | |
1288 | ||
1289 | /* Retransmit group-specific queries? (RFC3376: 6.6.3.1) */ | |
1290 | if (group->group_specific_query_retransmit_count > 0) { | |
1291 | ||
1292 | /* Retransmit group-specific queries (RFC3376: 6.6.3.1) */ | |
1293 | group_retransmit_group(group); | |
1294 | --group->group_specific_query_retransmit_count; | |
1295 | ||
1296 | /* | |
1297 | RFC3376: 6.6.3.2 | |
1298 | If a group specific query is scheduled to be transmitted at the | |
1299 | same time as a group and source specific query for the same group, | |
1300 | then transmission of the group and source specific message with the | |
1301 | "Suppress Router-Side Processing" bit set may be suppressed. | |
1302 | */ | |
1303 | send_with_sflag_set = 0; /* boolean=false */ | |
1304 | } | |
1305 | else { | |
1306 | send_with_sflag_set = 1; /* boolean=true */ | |
1307 | } | |
1308 | ||
1309 | /* Retransmit group-and-source-specific queries (RFC3376: 6.6.3.2) */ | |
1310 | num_retransmit_sources_left = group_retransmit_sources(group, | |
1311 | send_with_sflag_set); | |
1312 | ||
1313 | group->t_group_query_retransmit_timer = 0; | |
1314 | ||
1315 | /* | |
1316 | Keep group retransmit timer running if there is any retransmit | |
1317 | counter pending | |
1318 | */ | |
1319 | if ((num_retransmit_sources_left > 0) || | |
1320 | (group->group_specific_query_retransmit_count > 0)) { | |
1321 | group_retransmit_timer_on(group); | |
1322 | } | |
1323 | ||
1324 | return 0; | |
1325 | } | |
1326 | ||
1327 | /* | |
1328 | group_retransmit_timer_on: | |
1329 | if group retransmit timer isn't running, starts it; | |
1330 | otherwise, do nothing | |
1331 | */ | |
1332 | static void group_retransmit_timer_on(struct igmp_group *group) | |
1333 | { | |
1334 | struct igmp_sock *igmp; | |
1335 | struct pim_interface *pim_ifp; | |
1336 | long lmqi_msec; /* Last Member Query Interval */ | |
1337 | ||
1338 | /* if group retransmit timer is running, do nothing */ | |
1339 | if (group->t_group_query_retransmit_timer) { | |
1340 | return; | |
1341 | } | |
1342 | ||
1343 | igmp = group->group_igmp_sock; | |
1344 | pim_ifp = igmp->interface->info; | |
1345 | ||
1346 | lmqi_msec = 100 * pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1347 | ||
1348 | if (PIM_DEBUG_IGMP_TRACE) { | |
1349 | char group_str[100]; | |
1350 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
1351 | zlog_debug("Scheduling %ld.%03ld sec retransmit timer for group %s on %s", | |
1352 | lmqi_msec / 1000, | |
1353 | lmqi_msec % 1000, | |
1354 | group_str, | |
1355 | igmp->interface->name); | |
1356 | } | |
1357 | ||
1358 | THREAD_TIMER_MSEC_ON(master, group->t_group_query_retransmit_timer, | |
1359 | igmp_group_retransmit, | |
1360 | group, lmqi_msec); | |
1361 | } | |
1362 | ||
1363 | static long igmp_group_timer_remain_msec(struct igmp_group *group) | |
1364 | { | |
1365 | return pim_time_timer_remain_msec(group->t_group_timer); | |
1366 | } | |
1367 | ||
1368 | static long igmp_source_timer_remain_msec(struct igmp_source *source) | |
1369 | { | |
1370 | return pim_time_timer_remain_msec(source->t_source_timer); | |
1371 | } | |
1372 | ||
1373 | /* | |
1374 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
1375 | */ | |
1376 | static void group_query_send(struct igmp_group *group) | |
1377 | { | |
1378 | long lmqc; /* Last Member Query Count */ | |
1379 | ||
1380 | lmqc = group->group_igmp_sock->querier_robustness_variable; | |
1381 | ||
1382 | /* lower group timer to lmqt */ | |
1383 | igmp_group_timer_lower_to_lmqt(group); | |
1384 | ||
1385 | /* reset retransmission counter */ | |
1386 | group->group_specific_query_retransmit_count = lmqc; | |
1387 | ||
1388 | /* immediately send group specific query (decrease retransmit counter by 1)*/ | |
1389 | group_retransmit_group(group); | |
1390 | ||
1391 | /* make sure group retransmit timer is running */ | |
1392 | group_retransmit_timer_on(group); | |
1393 | } | |
1394 | ||
1395 | /* | |
1396 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific Queries | |
1397 | */ | |
1398 | static void source_query_send_by_flag(struct igmp_group *group, | |
1399 | int num_sources_tosend) | |
1400 | { | |
1401 | struct igmp_sock *igmp; | |
1402 | struct pim_interface *pim_ifp; | |
1403 | struct listnode *src_node; | |
1404 | struct igmp_source *src; | |
1405 | long lmqc; /* Last Member Query Count */ | |
1406 | long lmqi_msec; /* Last Member Query Interval */ | |
1407 | long lmqt_msec; /* Last Member Query Time */ | |
1408 | ||
1409 | zassert(num_sources_tosend > 0); | |
1410 | ||
1411 | igmp = group->group_igmp_sock; | |
1412 | pim_ifp = igmp->interface->info; | |
1413 | ||
1414 | lmqc = igmp->querier_robustness_variable; | |
1415 | lmqi_msec = 100 * pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1416 | lmqt_msec = lmqc * lmqi_msec; | |
1417 | ||
1418 | /* | |
1419 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific Queries | |
1420 | ||
1421 | (...) for each of the sources in X of group G, with source timer larger | |
1422 | than LMQT: | |
1423 | o Set number of retransmissions for each source to [Last Member | |
1424 | Query Count]. | |
1425 | o Lower source timer to LMQT. | |
1426 | */ | |
1427 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { | |
1428 | if (IGMP_SOURCE_TEST_SEND(src->source_flags)) { | |
1429 | /* source "src" in X of group G */ | |
1430 | if (igmp_source_timer_remain_msec(src) > lmqt_msec) { | |
1431 | src->source_query_retransmit_count = lmqc; | |
1432 | igmp_source_timer_lower_to_lmqt(src); | |
1433 | } | |
1434 | } | |
1435 | } | |
1436 | ||
1437 | /* send group-and-source specific queries */ | |
1438 | group_retransmit_sources(group, 1 /* send_with_sflag_set=true */); | |
1439 | ||
1440 | /* make sure group retransmit timer is running */ | |
1441 | group_retransmit_timer_on(group); | |
1442 | } | |
1443 | ||
1444 | static void block_excl(struct igmp_group *group, | |
1445 | int num_sources, struct in_addr *sources) | |
1446 | { | |
1447 | int num_sources_tosend = 0; | |
1448 | int i; | |
1449 | ||
1450 | /* 1. clear off SEND flag from all known sources (X,Y) */ | |
1451 | source_clear_send_flag(group->group_source_list); | |
1452 | ||
1453 | /* 2. scan received sources (A) */ | |
1454 | for (i = 0; i < num_sources; ++i) { | |
1455 | struct igmp_source *source; | |
1456 | struct in_addr *src_addr; | |
1457 | ||
1458 | src_addr = sources + i; | |
1459 | ||
1460 | /* lookup reported source (A) in known sources (X,Y) */ | |
1461 | source = igmp_find_source_by_addr(group, *src_addr); | |
1462 | if (!source) { | |
1463 | /* 3: if not found, create source with Group Timer: (A-X-Y)=Group Timer */ | |
1464 | long group_timer_msec; | |
9bd7302f | 1465 | source = source_new(group, *src_addr); |
12e41d03 DL |
1466 | if (!source) { |
1467 | /* ugh, internal malloc failure, skip source */ | |
1468 | continue; | |
1469 | } | |
1470 | ||
1471 | zassert(!source->t_source_timer); /* timer == 0 */ | |
1472 | group_timer_msec = igmp_group_timer_remain_msec(group); | |
1473 | igmp_source_timer_on(group, source, group_timer_msec); | |
1474 | zassert(source->t_source_timer); /* (A-X-Y) timer > 0 */ | |
1475 | } | |
1476 | ||
1477 | if (source->t_source_timer) { | |
1478 | /* 4. if source timer>0 mark SEND flag: Q(G,A-Y) */ | |
1479 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
1480 | ++num_sources_tosend; | |
1481 | } | |
1482 | } | |
1483 | ||
1484 | /* 5. send sources marked with SEND flag: Q(G,A-Y) */ | |
1485 | if (num_sources_tosend > 0) { | |
1486 | source_query_send_by_flag(group, num_sources_tosend); | |
1487 | } | |
1488 | } | |
1489 | ||
1490 | static void block_incl(struct igmp_group *group, | |
1491 | int num_sources, struct in_addr *sources) | |
1492 | { | |
1493 | int num_sources_tosend = 0; | |
1494 | int i; | |
1495 | ||
1496 | /* 1. clear off SEND flag from all known sources (B) */ | |
1497 | source_clear_send_flag(group->group_source_list); | |
1498 | ||
1499 | /* 2. scan received sources (A) */ | |
1500 | for (i = 0; i < num_sources; ++i) { | |
1501 | struct igmp_source *source; | |
1502 | struct in_addr *src_addr; | |
1503 | ||
1504 | src_addr = sources + i; | |
1505 | ||
1506 | /* lookup reported source (A) in known sources (B) */ | |
1507 | source = igmp_find_source_by_addr(group, *src_addr); | |
1508 | if (source) { | |
1509 | /* 3. if found (A*B), mark SEND flag: Q(G,A*B) */ | |
1510 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
1511 | ++num_sources_tosend; | |
1512 | } | |
1513 | } | |
1514 | ||
1515 | /* 4. send sources marked with SEND flag: Q(G,A*B) */ | |
1516 | if (num_sources_tosend > 0) { | |
1517 | source_query_send_by_flag(group, num_sources_tosend); | |
1518 | } | |
1519 | } | |
1520 | ||
1521 | void igmpv3_report_block(struct igmp_sock *igmp, struct in_addr from, | |
1522 | struct in_addr group_addr, | |
1523 | int num_sources, struct in_addr *sources) | |
1524 | { | |
1525 | struct interface *ifp = igmp->interface; | |
1526 | struct igmp_group *group; | |
1527 | ||
1528 | on_trace(__PRETTY_FUNCTION__, | |
1529 | ifp, from, group_addr, num_sources, sources); | |
1530 | ||
1531 | /* non-existant group is created as INCLUDE {empty} */ | |
915c13b3 | 1532 | group = igmp_add_group_by_addr(igmp, group_addr); |
12e41d03 DL |
1533 | if (!group) { |
1534 | return; | |
1535 | } | |
1536 | ||
1537 | if (group->group_filtermode_isexcl) { | |
1538 | /* EXCLUDE mode */ | |
1539 | block_excl(group, num_sources, sources); | |
1540 | } | |
1541 | else { | |
1542 | /* INCLUDE mode */ | |
1543 | block_incl(group, num_sources, sources); | |
1544 | } | |
1545 | } | |
1546 | ||
1547 | void igmp_group_timer_lower_to_lmqt(struct igmp_group *group) | |
1548 | { | |
1549 | struct igmp_sock *igmp; | |
1550 | struct interface *ifp; | |
1551 | struct pim_interface *pim_ifp; | |
1552 | char *ifname; | |
1553 | int lmqi_dsec; /* Last Member Query Interval */ | |
1554 | int lmqc; /* Last Member Query Count */ | |
1555 | int lmqt_msec; /* Last Member Query Time */ | |
1556 | ||
1557 | /* | |
1558 | RFC 3376: 6.2.2. Definition of Group Timers | |
1559 | ||
1560 | The group timer is only used when a group is in EXCLUDE mode and | |
1561 | it represents the time for the *filter-mode* of the group to | |
1562 | expire and switch to INCLUDE mode. | |
1563 | */ | |
1564 | if (!group->group_filtermode_isexcl) { | |
1565 | return; | |
1566 | } | |
1567 | ||
1568 | igmp = group->group_igmp_sock; | |
1569 | ifp = igmp->interface; | |
1570 | pim_ifp = ifp->info; | |
1571 | ifname = ifp->name; | |
1572 | ||
1573 | lmqi_dsec = pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1574 | lmqc = igmp->querier_robustness_variable; | |
1575 | lmqt_msec = PIM_IGMP_LMQT_MSEC(lmqi_dsec, lmqc); /* lmqt_msec = (100 * lmqi_dsec) * lmqc */ | |
1576 | ||
1577 | if (PIM_DEBUG_IGMP_TRACE) { | |
1578 | char group_str[100]; | |
1579 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
1580 | zlog_debug("%s: group %s on %s: LMQC=%d LMQI=%d dsec LMQT=%d msec", | |
1581 | __PRETTY_FUNCTION__, | |
1582 | group_str, ifname, | |
1583 | lmqc, lmqi_dsec, lmqt_msec); | |
1584 | } | |
1585 | ||
1586 | zassert(group->group_filtermode_isexcl); | |
1587 | ||
1588 | igmp_group_timer_on(group, lmqt_msec, ifname); | |
1589 | } | |
1590 | ||
1591 | void igmp_source_timer_lower_to_lmqt(struct igmp_source *source) | |
1592 | { | |
1593 | struct igmp_group *group; | |
1594 | struct igmp_sock *igmp; | |
1595 | struct interface *ifp; | |
1596 | struct pim_interface *pim_ifp; | |
1597 | char *ifname; | |
1598 | int lmqi_dsec; /* Last Member Query Interval */ | |
1599 | int lmqc; /* Last Member Query Count */ | |
1600 | int lmqt_msec; /* Last Member Query Time */ | |
1601 | ||
1602 | group = source->source_group; | |
1603 | igmp = group->group_igmp_sock; | |
1604 | ifp = igmp->interface; | |
1605 | pim_ifp = ifp->info; | |
1606 | ifname = ifp->name; | |
1607 | ||
1608 | lmqi_dsec = pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1609 | lmqc = igmp->querier_robustness_variable; | |
1610 | lmqt_msec = PIM_IGMP_LMQT_MSEC(lmqi_dsec, lmqc); /* lmqt_msec = (100 * lmqi_dsec) * lmqc */ | |
1611 | ||
1612 | if (PIM_DEBUG_IGMP_TRACE) { | |
1613 | char group_str[100]; | |
1614 | char source_str[100]; | |
1615 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
1616 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
1617 | zlog_debug("%s: group %s source %s on %s: LMQC=%d LMQI=%d dsec LMQT=%d msec", | |
1618 | __PRETTY_FUNCTION__, | |
1619 | group_str, source_str, ifname, | |
1620 | lmqc, lmqi_dsec, lmqt_msec); | |
1621 | } | |
1622 | ||
1623 | igmp_source_timer_on(group, source, lmqt_msec); | |
1624 | } | |
1625 | ||
1626 | /* | |
1627 | Copy sources to message: | |
1628 | ||
1629 | struct in_addr *sources = (struct in_addr *)(query_buf + IGMP_V3_SOURCES_OFFSET); | |
1630 | if (num_sources > 0) { | |
1631 | struct listnode *node; | |
1632 | struct igmp_source *src; | |
1633 | int i = 0; | |
1634 | ||
1635 | for (ALL_LIST_ELEMENTS_RO(source_list, node, src)) { | |
1636 | sources[i++] = src->source_addr; | |
1637 | } | |
1638 | } | |
1639 | */ | |
1640 | void pim_igmp_send_membership_query(struct igmp_group *group, | |
1641 | int fd, | |
1642 | const char *ifname, | |
1643 | char *query_buf, | |
1644 | int query_buf_size, | |
1645 | int num_sources, | |
1646 | struct in_addr dst_addr, | |
1647 | struct in_addr group_addr, | |
1648 | int query_max_response_time_dsec, | |
1649 | uint8_t s_flag, | |
1650 | uint8_t querier_robustness_variable, | |
1651 | uint16_t querier_query_interval) | |
1652 | { | |
1653 | ssize_t msg_size; | |
1654 | uint8_t max_resp_code; | |
1655 | uint8_t qqic; | |
1656 | ssize_t sent; | |
1657 | struct sockaddr_in to; | |
1658 | socklen_t tolen; | |
1659 | uint16_t checksum; | |
1660 | ||
1661 | zassert(num_sources >= 0); | |
1662 | ||
1663 | msg_size = IGMP_V3_SOURCES_OFFSET + (num_sources << 2); | |
1664 | if (msg_size > query_buf_size) { | |
1665 | zlog_err("%s %s: unable to send: msg_size=%zd larger than query_buf_size=%d", | |
1666 | __FILE__, __PRETTY_FUNCTION__, | |
1667 | msg_size, query_buf_size); | |
1668 | return; | |
1669 | } | |
1670 | ||
1671 | s_flag = PIM_FORCE_BOOLEAN(s_flag); | |
1672 | zassert((s_flag == 0) || (s_flag == 1)); | |
1673 | ||
1674 | max_resp_code = igmp_msg_encode16to8(query_max_response_time_dsec); | |
1675 | qqic = igmp_msg_encode16to8(querier_query_interval); | |
1676 | ||
1677 | /* | |
1678 | RFC 3376: 4.1.6. QRV (Querier's Robustness Variable) | |
1679 | ||
1680 | If non-zero, the QRV field contains the [Robustness Variable] | |
1681 | value used by the querier, i.e., the sender of the Query. If the | |
1682 | querier's [Robustness Variable] exceeds 7, the maximum value of | |
1683 | the QRV field, the QRV is set to zero. | |
1684 | */ | |
1685 | if (querier_robustness_variable > 7) { | |
1686 | querier_robustness_variable = 0; | |
1687 | } | |
1688 | ||
1689 | query_buf[0] = PIM_IGMP_MEMBERSHIP_QUERY; | |
1690 | query_buf[1] = max_resp_code; | |
1691 | *(uint16_t *)(query_buf + IGMP_V3_CHECKSUM_OFFSET) = 0; /* for computing checksum */ | |
1692 | memcpy(query_buf+4, &group_addr, sizeof(struct in_addr)); | |
1693 | ||
1694 | query_buf[8] = (s_flag << 3) | querier_robustness_variable; | |
1695 | query_buf[9] = qqic; | |
1696 | *(uint16_t *)(query_buf + IGMP_V3_NUMSOURCES_OFFSET) = htons(num_sources); | |
1697 | ||
1698 | checksum = in_cksum(query_buf, msg_size); | |
1699 | *(uint16_t *)(query_buf + IGMP_V3_CHECKSUM_OFFSET) = checksum; | |
1700 | ||
1701 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1702 | char dst_str[100]; | |
1703 | char group_str[100]; | |
1704 | pim_inet4_dump("<dst?>", dst_addr, dst_str, sizeof(dst_str)); | |
1705 | pim_inet4_dump("<group?>", group_addr, group_str, sizeof(group_str)); | |
1706 | zlog_debug("%s: to %s on %s: group=%s sources=%d msg_size=%zd s_flag=%x QRV=%u QQI=%u QQIC=%02x checksum=%x", | |
1707 | __PRETTY_FUNCTION__, | |
1708 | dst_str, ifname, group_str, num_sources, | |
1709 | msg_size, s_flag, querier_robustness_variable, | |
1710 | querier_query_interval, qqic, checksum); | |
1711 | } | |
1712 | ||
12e41d03 | 1713 | memset(&to, 0, sizeof(to)); |
12e41d03 DL |
1714 | to.sin_family = AF_INET; |
1715 | to.sin_addr = dst_addr; | |
12e41d03 DL |
1716 | tolen = sizeof(to); |
1717 | ||
59e96cda DL |
1718 | sent = sendto(fd, query_buf, msg_size, MSG_DONTWAIT, |
1719 | (struct sockaddr *)&to, tolen); | |
12e41d03 | 1720 | if (sent != (ssize_t) msg_size) { |
12e41d03 DL |
1721 | char dst_str[100]; |
1722 | char group_str[100]; | |
1723 | pim_inet4_dump("<dst?>", dst_addr, dst_str, sizeof(dst_str)); | |
1724 | pim_inet4_dump("<group?>", group_addr, group_str, sizeof(group_str)); | |
1725 | if (sent < 0) { | |
1726 | zlog_warn("%s: sendto() failure to %s on %s: group=%s msg_size=%zd: errno=%d: %s", | |
1727 | __PRETTY_FUNCTION__, | |
1728 | dst_str, ifname, group_str, msg_size, | |
3d7765d7 | 1729 | errno, safe_strerror(errno)); |
12e41d03 DL |
1730 | } |
1731 | else { | |
1732 | zlog_warn("%s: sendto() partial to %s on %s: group=%s msg_size=%zd: sent=%zd", | |
1733 | __PRETTY_FUNCTION__, | |
1734 | dst_str, ifname, group_str, | |
1735 | msg_size, sent); | |
1736 | } | |
1737 | return; | |
1738 | } | |
1739 | ||
1740 | /* | |
1741 | s_flag sanity test: s_flag must be set for general queries | |
1742 | ||
1743 | RFC 3376: 6.6.1. Timer Updates | |
1744 | ||
1745 | When a router sends or receives a query with a clear Suppress | |
1746 | Router-Side Processing flag, it must update its timers to reflect | |
1747 | the correct timeout values for the group or sources being queried. | |
1748 | ||
1749 | General queries don't trigger timer update. | |
1750 | */ | |
1751 | if (!s_flag) { | |
1752 | /* general query? */ | |
1753 | if (PIM_INADDR_IS_ANY(group_addr)) { | |
1754 | char dst_str[100]; | |
1755 | char group_str[100]; | |
1756 | pim_inet4_dump("<dst?>", dst_addr, dst_str, sizeof(dst_str)); | |
1757 | pim_inet4_dump("<group?>", group_addr, group_str, sizeof(group_str)); | |
1758 | zlog_warn("%s: to %s on %s: group=%s sources=%d: s_flag is clear for general query!", | |
1759 | __PRETTY_FUNCTION__, | |
1760 | dst_str, ifname, group_str, num_sources); | |
1761 | } | |
1762 | } | |
1763 | ||
1764 | } |