]>
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 | ||
20 | $QuaggaId: $Format:%an, %ai, %h$ $ | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
24 | #include "log.h" | |
25 | #include "memory.h" | |
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 | ||
313 | static void source_mark_delete_flag(struct list *source_list) | |
314 | { | |
315 | struct listnode *src_node; | |
316 | struct igmp_source *src; | |
317 | ||
318 | for (ALL_LIST_ELEMENTS_RO(source_list, src_node, src)) { | |
319 | IGMP_SOURCE_DO_DELETE(src->source_flags); | |
320 | } | |
321 | } | |
322 | ||
323 | static void source_mark_send_flag(struct list *source_list) | |
324 | { | |
325 | struct listnode *src_node; | |
326 | struct igmp_source *src; | |
327 | ||
328 | for (ALL_LIST_ELEMENTS_RO(source_list, src_node, src)) { | |
329 | IGMP_SOURCE_DO_SEND(src->source_flags); | |
330 | } | |
331 | } | |
332 | ||
333 | static int source_mark_send_flag_by_timer(struct list *source_list) | |
334 | { | |
335 | struct listnode *src_node; | |
336 | struct igmp_source *src; | |
337 | int num_marked_sources = 0; | |
338 | ||
339 | for (ALL_LIST_ELEMENTS_RO(source_list, src_node, src)) { | |
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 | ||
497 | src = XMALLOC(MTYPE_PIM_IGMP_GROUP_SOURCE, sizeof(*src)); | |
498 | if (!src) { | |
499 | zlog_warn("%s %s: XMALLOC() failure", | |
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 | { | |
545 | struct interface *ifp = igmp->interface; | |
546 | struct igmp_group *group; | |
547 | int i; | |
548 | ||
549 | /* non-existant group is created as INCLUDE {empty} */ | |
550 | group = igmp_add_group_by_addr(igmp, group_addr, ifp->name); | |
551 | if (!group) { | |
552 | return; | |
553 | } | |
554 | ||
555 | /* scan received sources */ | |
556 | for (i = 0; i < num_sources; ++i) { | |
557 | struct igmp_source *source; | |
558 | struct in_addr *src_addr; | |
559 | ||
560 | src_addr = sources + i; | |
561 | ||
9bd7302f | 562 | source = add_source_by_addr(igmp, group, *src_addr); |
12e41d03 DL |
563 | if (!source) { |
564 | continue; | |
565 | } | |
566 | ||
567 | /* | |
568 | RFC 3376: 6.4.1. Reception of Current-State Records | |
569 | ||
570 | When receiving IS_IN reports for groups in EXCLUDE mode is | |
571 | sources should be moved from set with (timers = 0) to set with | |
572 | (timers > 0). | |
573 | ||
574 | igmp_source_reset_gmi() below, resetting the source timers to | |
575 | GMI, accomplishes this. | |
576 | */ | |
577 | igmp_source_reset_gmi(igmp, group, source); | |
578 | ||
579 | } /* scan received sources */ | |
580 | } | |
581 | ||
582 | void igmpv3_report_isin(struct igmp_sock *igmp, struct in_addr from, | |
583 | struct in_addr group_addr, | |
584 | int num_sources, struct in_addr *sources) | |
585 | { | |
586 | on_trace(__PRETTY_FUNCTION__, | |
587 | igmp->interface, from, group_addr, num_sources, sources); | |
588 | ||
589 | allow(igmp, from, group_addr, num_sources, sources); | |
590 | } | |
591 | ||
592 | static void isex_excl(struct igmp_group *group, | |
593 | int num_sources, struct in_addr *sources) | |
594 | { | |
595 | int i; | |
596 | ||
597 | /* EXCLUDE mode */ | |
598 | zassert(group->group_filtermode_isexcl); | |
599 | ||
600 | /* E.1: set deletion flag for known sources (X,Y) */ | |
601 | source_mark_delete_flag(group->group_source_list); | |
602 | ||
603 | /* scan received sources (A) */ | |
604 | for (i = 0; i < num_sources; ++i) { | |
605 | struct igmp_source *source; | |
606 | struct in_addr *src_addr; | |
607 | ||
608 | src_addr = sources + i; | |
609 | ||
610 | /* E.2: lookup reported source from (A) in (X,Y) */ | |
611 | source = igmp_find_source_by_addr(group, *src_addr); | |
612 | if (source) { | |
613 | /* E.3: if found, clear deletion flag: (X*A) or (Y*A) */ | |
614 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
615 | } | |
616 | else { | |
617 | /* E.4: if not found, create source with timer=GMI: (A-X-Y) */ | |
9bd7302f | 618 | source = source_new(group, *src_addr); |
12e41d03 DL |
619 | if (!source) { |
620 | /* ugh, internal malloc failure, skip source */ | |
621 | continue; | |
622 | } | |
623 | zassert(!source->t_source_timer); /* timer == 0 */ | |
624 | igmp_source_reset_gmi(group->group_igmp_sock, group, source); | |
625 | zassert(source->t_source_timer); /* (A-X-Y) timer > 0 */ | |
626 | } | |
627 | ||
628 | } /* scan received sources */ | |
629 | ||
630 | /* E.5: delete all sources marked with deletion flag: (X-A) and (Y-A) */ | |
631 | source_delete_by_flag(group->group_source_list); | |
632 | } | |
633 | ||
634 | static void isex_incl(struct igmp_group *group, | |
635 | int num_sources, struct in_addr *sources) | |
636 | { | |
637 | int i; | |
638 | ||
639 | /* INCLUDE mode */ | |
640 | zassert(!group->group_filtermode_isexcl); | |
641 | ||
642 | /* I.1: set deletion flag for known sources (A) */ | |
643 | source_mark_delete_flag(group->group_source_list); | |
644 | ||
645 | /* scan received sources (B) */ | |
646 | for (i = 0; i < num_sources; ++i) { | |
647 | struct igmp_source *source; | |
648 | struct in_addr *src_addr; | |
649 | ||
650 | src_addr = sources + i; | |
651 | ||
652 | /* I.2: lookup reported source (B) */ | |
653 | source = igmp_find_source_by_addr(group, *src_addr); | |
654 | if (source) { | |
655 | /* I.3: if found, clear deletion flag (A*B) */ | |
656 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
657 | } | |
658 | else { | |
659 | /* I.4: if not found, create source with timer=0 (B-A) */ | |
9bd7302f | 660 | source = source_new(group, *src_addr); |
12e41d03 DL |
661 | if (!source) { |
662 | /* ugh, internal malloc failure, skip source */ | |
663 | continue; | |
664 | } | |
665 | zassert(!source->t_source_timer); /* (B-A) timer=0 */ | |
666 | } | |
667 | ||
668 | } /* scan received sources */ | |
669 | ||
670 | /* I.5: delete all sources marked with deletion flag (A-B) */ | |
671 | source_delete_by_flag(group->group_source_list); | |
672 | ||
673 | group->group_filtermode_isexcl = 1; /* boolean=true */ | |
674 | ||
675 | zassert(group->group_filtermode_isexcl); | |
676 | ||
677 | group_exclude_fwd_anysrc_ifempty(group); | |
678 | } | |
679 | ||
680 | void igmpv3_report_isex(struct igmp_sock *igmp, struct in_addr from, | |
681 | struct in_addr group_addr, | |
682 | int num_sources, struct in_addr *sources) | |
683 | { | |
684 | struct interface *ifp = igmp->interface; | |
685 | struct igmp_group *group; | |
686 | ||
687 | on_trace(__PRETTY_FUNCTION__, | |
688 | ifp, from, group_addr, num_sources, sources); | |
689 | ||
690 | /* non-existant group is created as INCLUDE {empty} */ | |
691 | group = igmp_add_group_by_addr(igmp, group_addr, ifp->name); | |
692 | if (!group) { | |
693 | return; | |
694 | } | |
695 | ||
696 | if (group->group_filtermode_isexcl) { | |
697 | /* EXCLUDE mode */ | |
698 | isex_excl(group, num_sources, sources); | |
699 | } | |
700 | else { | |
701 | /* INCLUDE mode */ | |
702 | isex_incl(group, num_sources, sources); | |
703 | zassert(group->group_filtermode_isexcl); | |
704 | } | |
705 | ||
706 | zassert(group->group_filtermode_isexcl); | |
707 | ||
708 | igmp_group_reset_gmi(group); | |
709 | } | |
710 | ||
711 | static void toin_incl(struct igmp_group *group, | |
712 | int num_sources, struct in_addr *sources) | |
713 | { | |
714 | struct igmp_sock *igmp = group->group_igmp_sock; | |
715 | int num_sources_tosend = listcount(group->group_source_list); | |
716 | int i; | |
717 | ||
718 | /* Set SEND flag for all known sources (A) */ | |
719 | source_mark_send_flag(group->group_source_list); | |
720 | ||
721 | /* Scan received sources (B) */ | |
722 | for (i = 0; i < num_sources; ++i) { | |
723 | struct igmp_source *source; | |
724 | struct in_addr *src_addr; | |
725 | ||
726 | src_addr = sources + i; | |
727 | ||
728 | /* Lookup reported source (B) */ | |
729 | source = igmp_find_source_by_addr(group, *src_addr); | |
730 | if (source) { | |
731 | /* If found, clear SEND flag (A*B) */ | |
732 | IGMP_SOURCE_DONT_SEND(source->source_flags); | |
733 | --num_sources_tosend; | |
734 | } | |
735 | else { | |
736 | /* If not found, create new source */ | |
9bd7302f | 737 | source = source_new(group, *src_addr); |
12e41d03 DL |
738 | if (!source) { |
739 | /* ugh, internal malloc failure, skip source */ | |
740 | continue; | |
741 | } | |
742 | } | |
743 | ||
744 | /* (B)=GMI */ | |
745 | igmp_source_reset_gmi(igmp, group, source); | |
746 | } | |
747 | ||
748 | /* Send sources marked with SEND flag: Q(G,A-B) */ | |
749 | if (num_sources_tosend > 0) { | |
750 | source_query_send_by_flag(group, num_sources_tosend); | |
751 | } | |
752 | } | |
753 | ||
754 | static void toin_excl(struct igmp_group *group, | |
755 | int num_sources, struct in_addr *sources) | |
756 | { | |
757 | struct igmp_sock *igmp = group->group_igmp_sock; | |
758 | int num_sources_tosend; | |
759 | int i; | |
760 | ||
761 | /* Set SEND flag for X (sources with timer > 0) */ | |
762 | num_sources_tosend = source_mark_send_flag_by_timer(group->group_source_list); | |
763 | ||
764 | /* Scan received sources (A) */ | |
765 | for (i = 0; i < num_sources; ++i) { | |
766 | struct igmp_source *source; | |
767 | struct in_addr *src_addr; | |
768 | ||
769 | src_addr = sources + i; | |
770 | ||
771 | /* Lookup reported source (A) */ | |
772 | source = igmp_find_source_by_addr(group, *src_addr); | |
773 | if (source) { | |
774 | if (source->t_source_timer) { | |
775 | /* If found and timer running, clear SEND flag (X*A) */ | |
776 | IGMP_SOURCE_DONT_SEND(source->source_flags); | |
777 | --num_sources_tosend; | |
778 | } | |
779 | } | |
780 | else { | |
781 | /* If not found, create new source */ | |
9bd7302f | 782 | source = source_new(group, *src_addr); |
12e41d03 DL |
783 | if (!source) { |
784 | /* ugh, internal malloc failure, skip source */ | |
785 | continue; | |
786 | } | |
787 | } | |
788 | ||
789 | /* (A)=GMI */ | |
790 | igmp_source_reset_gmi(igmp, group, source); | |
791 | } | |
792 | ||
793 | /* Send sources marked with SEND flag: Q(G,X-A) */ | |
794 | if (num_sources_tosend > 0) { | |
795 | source_query_send_by_flag(group, num_sources_tosend); | |
796 | } | |
797 | ||
798 | /* Send Q(G) */ | |
799 | group_query_send(group); | |
800 | } | |
801 | ||
802 | void igmpv3_report_toin(struct igmp_sock *igmp, struct in_addr from, | |
803 | struct in_addr group_addr, | |
804 | int num_sources, struct in_addr *sources) | |
805 | { | |
806 | struct interface *ifp = igmp->interface; | |
807 | struct igmp_group *group; | |
808 | ||
809 | on_trace(__PRETTY_FUNCTION__, | |
810 | ifp, from, group_addr, num_sources, sources); | |
811 | ||
812 | /* non-existant group is created as INCLUDE {empty} */ | |
813 | group = igmp_add_group_by_addr(igmp, group_addr, ifp->name); | |
814 | if (!group) { | |
815 | return; | |
816 | } | |
817 | ||
818 | if (group->group_filtermode_isexcl) { | |
819 | /* EXCLUDE mode */ | |
820 | toin_excl(group, num_sources, sources); | |
821 | } | |
822 | else { | |
823 | /* INCLUDE mode */ | |
824 | toin_incl(group, num_sources, sources); | |
825 | } | |
826 | } | |
827 | ||
828 | static void toex_incl(struct igmp_group *group, | |
829 | int num_sources, struct in_addr *sources) | |
830 | { | |
831 | int num_sources_tosend = 0; | |
832 | int i; | |
833 | ||
834 | zassert(!group->group_filtermode_isexcl); | |
835 | ||
836 | /* Set DELETE flag for all known sources (A) */ | |
837 | source_mark_delete_flag(group->group_source_list); | |
838 | ||
839 | /* Clear off SEND flag from all known sources (A) */ | |
840 | source_clear_send_flag(group->group_source_list); | |
841 | ||
842 | /* Scan received sources (B) */ | |
843 | for (i = 0; i < num_sources; ++i) { | |
844 | struct igmp_source *source; | |
845 | struct in_addr *src_addr; | |
846 | ||
847 | src_addr = sources + i; | |
848 | ||
849 | /* Lookup reported source (B) */ | |
850 | source = igmp_find_source_by_addr(group, *src_addr); | |
851 | if (source) { | |
852 | /* If found, clear deletion flag: (A*B) */ | |
853 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
854 | /* and set SEND flag (A*B) */ | |
855 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
856 | ++num_sources_tosend; | |
857 | } | |
858 | else { | |
859 | /* If source not found, create source with timer=0: (B-A)=0 */ | |
9bd7302f | 860 | source = source_new(group, *src_addr); |
12e41d03 DL |
861 | if (!source) { |
862 | /* ugh, internal malloc failure, skip source */ | |
863 | continue; | |
864 | } | |
865 | zassert(!source->t_source_timer); /* (B-A) timer=0 */ | |
866 | } | |
867 | ||
868 | } /* Scan received sources (B) */ | |
869 | ||
870 | group->group_filtermode_isexcl = 1; /* boolean=true */ | |
871 | ||
872 | /* Delete all sources marked with DELETE flag (A-B) */ | |
873 | source_delete_by_flag(group->group_source_list); | |
874 | ||
875 | /* Send sources marked with SEND flag: Q(G,A*B) */ | |
876 | if (num_sources_tosend > 0) { | |
877 | source_query_send_by_flag(group, num_sources_tosend); | |
878 | } | |
879 | ||
880 | zassert(group->group_filtermode_isexcl); | |
881 | ||
882 | group_exclude_fwd_anysrc_ifempty(group); | |
883 | } | |
884 | ||
885 | static void toex_excl(struct igmp_group *group, | |
886 | int num_sources, struct in_addr *sources) | |
887 | { | |
888 | int num_sources_tosend = 0; | |
889 | int i; | |
890 | ||
891 | /* set DELETE flag for all known sources (X,Y) */ | |
892 | source_mark_delete_flag(group->group_source_list); | |
893 | ||
894 | /* clear off SEND flag from all known sources (X,Y) */ | |
895 | source_clear_send_flag(group->group_source_list); | |
896 | ||
897 | /* scan received sources (A) */ | |
898 | for (i = 0; i < num_sources; ++i) { | |
899 | struct igmp_source *source; | |
900 | struct in_addr *src_addr; | |
901 | ||
902 | src_addr = sources + i; | |
903 | ||
904 | /* lookup reported source (A) in known sources (X,Y) */ | |
905 | source = igmp_find_source_by_addr(group, *src_addr); | |
906 | if (source) { | |
907 | /* if found, clear off DELETE flag from reported source (A) */ | |
908 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
909 | } | |
910 | else { | |
911 | /* if not found, create source with Group Timer: (A-X-Y)=Group Timer */ | |
912 | long group_timer_msec; | |
9bd7302f | 913 | source = source_new(group, *src_addr); |
12e41d03 DL |
914 | if (!source) { |
915 | /* ugh, internal malloc failure, skip source */ | |
916 | continue; | |
917 | } | |
918 | ||
919 | zassert(!source->t_source_timer); /* timer == 0 */ | |
920 | group_timer_msec = igmp_group_timer_remain_msec(group); | |
921 | igmp_source_timer_on(group, source, group_timer_msec); | |
922 | zassert(source->t_source_timer); /* (A-X-Y) timer > 0 */ | |
923 | ||
924 | /* make sure source is created with DELETE flag unset */ | |
925 | zassert(!IGMP_SOURCE_TEST_DELETE(source->source_flags)); | |
926 | } | |
927 | ||
928 | /* make sure reported source has DELETE flag unset */ | |
929 | zassert(!IGMP_SOURCE_TEST_DELETE(source->source_flags)); | |
930 | ||
931 | if (source->t_source_timer) { | |
932 | /* if source timer>0 mark SEND flag: Q(G,A-Y) */ | |
933 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
934 | ++num_sources_tosend; | |
935 | } | |
936 | ||
937 | } /* scan received sources (A) */ | |
938 | ||
939 | /* | |
940 | delete all sources marked with DELETE flag: | |
941 | Delete (X-A) | |
942 | Delete (Y-A) | |
943 | */ | |
944 | source_delete_by_flag(group->group_source_list); | |
945 | ||
946 | /* send sources marked with SEND flag: Q(G,A-Y) */ | |
947 | if (num_sources_tosend > 0) { | |
948 | source_query_send_by_flag(group, num_sources_tosend); | |
949 | } | |
950 | } | |
951 | ||
952 | void igmpv3_report_toex(struct igmp_sock *igmp, struct in_addr from, | |
953 | struct in_addr group_addr, | |
954 | int num_sources, struct in_addr *sources) | |
955 | { | |
956 | struct interface *ifp = igmp->interface; | |
957 | struct igmp_group *group; | |
958 | ||
959 | on_trace(__PRETTY_FUNCTION__, | |
960 | ifp, from, group_addr, num_sources, sources); | |
961 | ||
962 | /* non-existant group is created as INCLUDE {empty} */ | |
963 | group = igmp_add_group_by_addr(igmp, group_addr, ifp->name); | |
964 | if (!group) { | |
965 | return; | |
966 | } | |
967 | ||
968 | if (group->group_filtermode_isexcl) { | |
969 | /* EXCLUDE mode */ | |
970 | toex_excl(group, num_sources, sources); | |
971 | } | |
972 | else { | |
973 | /* INCLUDE mode */ | |
974 | toex_incl(group, num_sources, sources); | |
975 | zassert(group->group_filtermode_isexcl); | |
976 | } | |
977 | zassert(group->group_filtermode_isexcl); | |
978 | ||
979 | /* Group Timer=GMI */ | |
980 | igmp_group_reset_gmi(group); | |
981 | } | |
982 | ||
983 | void igmpv3_report_allow(struct igmp_sock *igmp, struct in_addr from, | |
984 | struct in_addr group_addr, | |
985 | int num_sources, struct in_addr *sources) | |
986 | { | |
987 | on_trace(__PRETTY_FUNCTION__, | |
988 | igmp->interface, from, group_addr, num_sources, sources); | |
989 | ||
990 | allow(igmp, from, group_addr, num_sources, sources); | |
991 | } | |
992 | ||
993 | /* | |
994 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
995 | ||
996 | When transmitting a group specific query, if the group timer is | |
997 | larger than LMQT, the "Suppress Router-Side Processing" bit is set | |
998 | in the query message. | |
999 | */ | |
1000 | static void group_retransmit_group(struct igmp_group *group) | |
1001 | { | |
1002 | char query_buf[PIM_IGMP_BUFSIZE_WRITE]; | |
1003 | struct igmp_sock *igmp; | |
1004 | struct pim_interface *pim_ifp; | |
1005 | long lmqc; /* Last Member Query Count */ | |
1006 | long lmqi_msec; /* Last Member Query Interval */ | |
1007 | long lmqt_msec; /* Last Member Query Time */ | |
1008 | int s_flag; | |
1009 | ||
1010 | igmp = group->group_igmp_sock; | |
1011 | pim_ifp = igmp->interface->info; | |
1012 | ||
1013 | lmqc = igmp->querier_robustness_variable; | |
1014 | lmqi_msec = 100 * pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1015 | lmqt_msec = lmqc * lmqi_msec; | |
1016 | ||
1017 | /* | |
1018 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
1019 | ||
1020 | When transmitting a group specific query, if the group timer is | |
1021 | larger than LMQT, the "Suppress Router-Side Processing" bit is set | |
1022 | in the query message. | |
1023 | */ | |
1024 | s_flag = igmp_group_timer_remain_msec(group) > lmqt_msec; | |
1025 | ||
1026 | if (PIM_DEBUG_IGMP_TRACE) { | |
1027 | char group_str[100]; | |
1028 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
1029 | zlog_debug("retransmit_group_specific_query: group %s on %s: s_flag=%d count=%d", | |
1030 | group_str, igmp->interface->name, s_flag, | |
1031 | group->group_specific_query_retransmit_count); | |
1032 | } | |
1033 | ||
1034 | /* | |
1035 | RFC3376: 4.1.12. IP Destination Addresses for Queries | |
1036 | ||
1037 | Group-Specific and Group-and-Source-Specific Queries are sent with | |
1038 | an IP destination address equal to the multicast address of | |
1039 | interest. | |
1040 | */ | |
1041 | ||
1042 | pim_igmp_send_membership_query(group, | |
1043 | igmp->fd, | |
1044 | igmp->interface->name, | |
1045 | query_buf, | |
1046 | sizeof(query_buf), | |
1047 | 0 /* num_sources_tosend */, | |
1048 | group->group_addr /* dst_addr */, | |
1049 | group->group_addr /* group_addr */, | |
1050 | pim_ifp->igmp_specific_query_max_response_time_dsec, | |
1051 | s_flag, | |
1052 | igmp->querier_robustness_variable, | |
1053 | igmp->querier_query_interval); | |
1054 | } | |
1055 | ||
1056 | /* | |
1057 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific Queries | |
1058 | ||
1059 | When building a group and source specific query for a group G, two | |
1060 | separate query messages are sent for the group. The first one has | |
1061 | the "Suppress Router-Side Processing" bit set and contains all the | |
1062 | sources with retransmission state and timers greater than LMQT. The | |
1063 | second has the "Suppress Router-Side Processing" bit clear and | |
1064 | contains all the sources with retransmission state and timers lower | |
1065 | or equal to LMQT. If either of the two calculated messages does not | |
1066 | contain any sources, then its transmission is suppressed. | |
1067 | */ | |
1068 | static int group_retransmit_sources(struct igmp_group *group, | |
1069 | int send_with_sflag_set) | |
1070 | { | |
1071 | struct igmp_sock *igmp; | |
1072 | struct pim_interface *pim_ifp; | |
1073 | long lmqc; /* Last Member Query Count */ | |
1074 | long lmqi_msec; /* Last Member Query Interval */ | |
1075 | long lmqt_msec; /* Last Member Query Time */ | |
1076 | char query_buf1[PIM_IGMP_BUFSIZE_WRITE]; /* 1 = with s_flag set */ | |
1077 | char query_buf2[PIM_IGMP_BUFSIZE_WRITE]; /* 2 = with s_flag clear */ | |
1078 | int query_buf1_max_sources; | |
1079 | int query_buf2_max_sources; | |
1080 | struct in_addr *source_addr1; | |
1081 | struct in_addr *source_addr2; | |
1082 | int num_sources_tosend1; | |
1083 | int num_sources_tosend2; | |
1084 | struct listnode *src_node; | |
1085 | struct igmp_source *src; | |
1086 | int num_retransmit_sources_left = 0; | |
1087 | ||
1088 | query_buf1_max_sources = (sizeof(query_buf1) - IGMP_V3_SOURCES_OFFSET) >> 2; | |
1089 | query_buf2_max_sources = (sizeof(query_buf2) - IGMP_V3_SOURCES_OFFSET) >> 2; | |
1090 | ||
1091 | source_addr1 = (struct in_addr *)(query_buf1 + IGMP_V3_SOURCES_OFFSET); | |
1092 | source_addr2 = (struct in_addr *)(query_buf2 + IGMP_V3_SOURCES_OFFSET); | |
1093 | ||
1094 | igmp = group->group_igmp_sock; | |
1095 | pim_ifp = igmp->interface->info; | |
1096 | ||
1097 | lmqc = igmp->querier_robustness_variable; | |
1098 | lmqi_msec = 100 * pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1099 | lmqt_msec = lmqc * lmqi_msec; | |
1100 | ||
1101 | /* Scan all group sources */ | |
1102 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { | |
1103 | ||
1104 | /* Source has retransmission state? */ | |
1105 | if (src->source_query_retransmit_count < 1) | |
1106 | continue; | |
1107 | ||
1108 | if (--src->source_query_retransmit_count > 0) { | |
1109 | ++num_retransmit_sources_left; | |
1110 | } | |
1111 | ||
1112 | /* Copy source address into appropriate query buffer */ | |
1113 | if (igmp_source_timer_remain_msec(src) > lmqt_msec) { | |
1114 | *source_addr1 = src->source_addr; | |
1115 | ++source_addr1; | |
1116 | } | |
1117 | else { | |
1118 | *source_addr2 = src->source_addr; | |
1119 | ++source_addr2; | |
1120 | } | |
1121 | ||
1122 | } | |
1123 | ||
1124 | num_sources_tosend1 = source_addr1 - (struct in_addr *)(query_buf1 + IGMP_V3_SOURCES_OFFSET); | |
1125 | num_sources_tosend2 = source_addr2 - (struct in_addr *)(query_buf2 + IGMP_V3_SOURCES_OFFSET); | |
1126 | ||
1127 | if (PIM_DEBUG_IGMP_TRACE) { | |
1128 | char group_str[100]; | |
1129 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
1130 | 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", | |
1131 | group_str, igmp->interface->name, | |
1132 | num_sources_tosend1, | |
1133 | num_sources_tosend2, | |
1134 | send_with_sflag_set, | |
1135 | num_retransmit_sources_left); | |
1136 | } | |
1137 | ||
1138 | if (num_sources_tosend1 > 0) { | |
1139 | /* | |
1140 | Send group-and-source-specific query with s_flag set and all | |
1141 | sources with timers greater than LMQT. | |
1142 | */ | |
1143 | ||
1144 | if (send_with_sflag_set) { | |
1145 | ||
1146 | query_buf1_max_sources = (sizeof(query_buf1) - IGMP_V3_SOURCES_OFFSET) >> 2; | |
1147 | if (num_sources_tosend1 > query_buf1_max_sources) { | |
1148 | char group_str[100]; | |
1149 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
1150 | zlog_warn("%s: group %s on %s: s_flag=1 unable to fit %d sources into buf_size=%zu (max_sources=%d)", | |
1151 | __PRETTY_FUNCTION__, group_str, igmp->interface->name, | |
1152 | num_sources_tosend1, sizeof(query_buf1), query_buf1_max_sources); | |
1153 | } | |
1154 | else { | |
1155 | /* | |
1156 | RFC3376: 4.1.12. IP Destination Addresses for Queries | |
1157 | ||
1158 | Group-Specific and Group-and-Source-Specific Queries are sent with | |
1159 | an IP destination address equal to the multicast address of | |
1160 | interest. | |
1161 | */ | |
1162 | ||
1163 | pim_igmp_send_membership_query(group, | |
1164 | igmp->fd, | |
1165 | igmp->interface->name, | |
1166 | query_buf1, | |
1167 | sizeof(query_buf1), | |
1168 | num_sources_tosend1, | |
1169 | group->group_addr, | |
1170 | group->group_addr, | |
1171 | pim_ifp->igmp_specific_query_max_response_time_dsec, | |
1172 | 1 /* s_flag */, | |
1173 | igmp->querier_robustness_variable, | |
1174 | igmp->querier_query_interval); | |
1175 | ||
1176 | } | |
1177 | ||
1178 | } /* send_with_sflag_set */ | |
1179 | ||
1180 | } | |
1181 | ||
1182 | if (num_sources_tosend2 > 0) { | |
1183 | /* | |
1184 | Send group-and-source-specific query with s_flag clear and all | |
1185 | sources with timers lower or equal to LMQT. | |
1186 | */ | |
1187 | ||
1188 | query_buf2_max_sources = (sizeof(query_buf2) - IGMP_V3_SOURCES_OFFSET) >> 2; | |
1189 | if (num_sources_tosend2 > query_buf2_max_sources) { | |
1190 | char group_str[100]; | |
1191 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
1192 | zlog_warn("%s: group %s on %s: s_flag=0 unable to fit %d sources into buf_size=%zu (max_sources=%d)", | |
1193 | __PRETTY_FUNCTION__, group_str, igmp->interface->name, | |
1194 | num_sources_tosend2, sizeof(query_buf2), query_buf2_max_sources); | |
1195 | } | |
1196 | else { | |
1197 | /* | |
1198 | RFC3376: 4.1.12. IP Destination Addresses for Queries | |
1199 | ||
1200 | Group-Specific and Group-and-Source-Specific Queries are sent with | |
1201 | an IP destination address equal to the multicast address of | |
1202 | interest. | |
1203 | */ | |
1204 | ||
1205 | pim_igmp_send_membership_query(group, | |
1206 | igmp->fd, | |
1207 | igmp->interface->name, | |
1208 | query_buf2, | |
1209 | sizeof(query_buf2), | |
1210 | num_sources_tosend2, | |
1211 | group->group_addr, | |
1212 | group->group_addr, | |
1213 | pim_ifp->igmp_specific_query_max_response_time_dsec, | |
1214 | 0 /* s_flag */, | |
1215 | igmp->querier_robustness_variable, | |
1216 | igmp->querier_query_interval); | |
1217 | ||
1218 | } | |
1219 | } | |
1220 | ||
1221 | return num_retransmit_sources_left; | |
1222 | } | |
1223 | ||
1224 | static int igmp_group_retransmit(struct thread *t) | |
1225 | { | |
1226 | struct igmp_group *group; | |
1227 | int num_retransmit_sources_left; | |
1228 | int send_with_sflag_set; /* boolean */ | |
1229 | ||
1230 | zassert(t); | |
1231 | group = THREAD_ARG(t); | |
1232 | zassert(group); | |
1233 | ||
1234 | if (PIM_DEBUG_IGMP_TRACE) { | |
1235 | char group_str[100]; | |
1236 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
1237 | zlog_debug("group_retransmit_timer: group %s on %s", | |
1238 | group_str, group->group_igmp_sock->interface->name); | |
1239 | } | |
1240 | ||
1241 | /* Retransmit group-specific queries? (RFC3376: 6.6.3.1) */ | |
1242 | if (group->group_specific_query_retransmit_count > 0) { | |
1243 | ||
1244 | /* Retransmit group-specific queries (RFC3376: 6.6.3.1) */ | |
1245 | group_retransmit_group(group); | |
1246 | --group->group_specific_query_retransmit_count; | |
1247 | ||
1248 | /* | |
1249 | RFC3376: 6.6.3.2 | |
1250 | If a group specific query is scheduled to be transmitted at the | |
1251 | same time as a group and source specific query for the same group, | |
1252 | then transmission of the group and source specific message with the | |
1253 | "Suppress Router-Side Processing" bit set may be suppressed. | |
1254 | */ | |
1255 | send_with_sflag_set = 0; /* boolean=false */ | |
1256 | } | |
1257 | else { | |
1258 | send_with_sflag_set = 1; /* boolean=true */ | |
1259 | } | |
1260 | ||
1261 | /* Retransmit group-and-source-specific queries (RFC3376: 6.6.3.2) */ | |
1262 | num_retransmit_sources_left = group_retransmit_sources(group, | |
1263 | send_with_sflag_set); | |
1264 | ||
1265 | group->t_group_query_retransmit_timer = 0; | |
1266 | ||
1267 | /* | |
1268 | Keep group retransmit timer running if there is any retransmit | |
1269 | counter pending | |
1270 | */ | |
1271 | if ((num_retransmit_sources_left > 0) || | |
1272 | (group->group_specific_query_retransmit_count > 0)) { | |
1273 | group_retransmit_timer_on(group); | |
1274 | } | |
1275 | ||
1276 | return 0; | |
1277 | } | |
1278 | ||
1279 | /* | |
1280 | group_retransmit_timer_on: | |
1281 | if group retransmit timer isn't running, starts it; | |
1282 | otherwise, do nothing | |
1283 | */ | |
1284 | static void group_retransmit_timer_on(struct igmp_group *group) | |
1285 | { | |
1286 | struct igmp_sock *igmp; | |
1287 | struct pim_interface *pim_ifp; | |
1288 | long lmqi_msec; /* Last Member Query Interval */ | |
1289 | ||
1290 | /* if group retransmit timer is running, do nothing */ | |
1291 | if (group->t_group_query_retransmit_timer) { | |
1292 | return; | |
1293 | } | |
1294 | ||
1295 | igmp = group->group_igmp_sock; | |
1296 | pim_ifp = igmp->interface->info; | |
1297 | ||
1298 | lmqi_msec = 100 * pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1299 | ||
1300 | if (PIM_DEBUG_IGMP_TRACE) { | |
1301 | char group_str[100]; | |
1302 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
1303 | zlog_debug("Scheduling %ld.%03ld sec retransmit timer for group %s on %s", | |
1304 | lmqi_msec / 1000, | |
1305 | lmqi_msec % 1000, | |
1306 | group_str, | |
1307 | igmp->interface->name); | |
1308 | } | |
1309 | ||
1310 | THREAD_TIMER_MSEC_ON(master, group->t_group_query_retransmit_timer, | |
1311 | igmp_group_retransmit, | |
1312 | group, lmqi_msec); | |
1313 | } | |
1314 | ||
1315 | static long igmp_group_timer_remain_msec(struct igmp_group *group) | |
1316 | { | |
1317 | return pim_time_timer_remain_msec(group->t_group_timer); | |
1318 | } | |
1319 | ||
1320 | static long igmp_source_timer_remain_msec(struct igmp_source *source) | |
1321 | { | |
1322 | return pim_time_timer_remain_msec(source->t_source_timer); | |
1323 | } | |
1324 | ||
1325 | /* | |
1326 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
1327 | */ | |
1328 | static void group_query_send(struct igmp_group *group) | |
1329 | { | |
1330 | long lmqc; /* Last Member Query Count */ | |
1331 | ||
1332 | lmqc = group->group_igmp_sock->querier_robustness_variable; | |
1333 | ||
1334 | /* lower group timer to lmqt */ | |
1335 | igmp_group_timer_lower_to_lmqt(group); | |
1336 | ||
1337 | /* reset retransmission counter */ | |
1338 | group->group_specific_query_retransmit_count = lmqc; | |
1339 | ||
1340 | /* immediately send group specific query (decrease retransmit counter by 1)*/ | |
1341 | group_retransmit_group(group); | |
1342 | ||
1343 | /* make sure group retransmit timer is running */ | |
1344 | group_retransmit_timer_on(group); | |
1345 | } | |
1346 | ||
1347 | /* | |
1348 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific Queries | |
1349 | */ | |
1350 | static void source_query_send_by_flag(struct igmp_group *group, | |
1351 | int num_sources_tosend) | |
1352 | { | |
1353 | struct igmp_sock *igmp; | |
1354 | struct pim_interface *pim_ifp; | |
1355 | struct listnode *src_node; | |
1356 | struct igmp_source *src; | |
1357 | long lmqc; /* Last Member Query Count */ | |
1358 | long lmqi_msec; /* Last Member Query Interval */ | |
1359 | long lmqt_msec; /* Last Member Query Time */ | |
1360 | ||
1361 | zassert(num_sources_tosend > 0); | |
1362 | ||
1363 | igmp = group->group_igmp_sock; | |
1364 | pim_ifp = igmp->interface->info; | |
1365 | ||
1366 | lmqc = igmp->querier_robustness_variable; | |
1367 | lmqi_msec = 100 * pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1368 | lmqt_msec = lmqc * lmqi_msec; | |
1369 | ||
1370 | /* | |
1371 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific Queries | |
1372 | ||
1373 | (...) for each of the sources in X of group G, with source timer larger | |
1374 | than LMQT: | |
1375 | o Set number of retransmissions for each source to [Last Member | |
1376 | Query Count]. | |
1377 | o Lower source timer to LMQT. | |
1378 | */ | |
1379 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { | |
1380 | if (IGMP_SOURCE_TEST_SEND(src->source_flags)) { | |
1381 | /* source "src" in X of group G */ | |
1382 | if (igmp_source_timer_remain_msec(src) > lmqt_msec) { | |
1383 | src->source_query_retransmit_count = lmqc; | |
1384 | igmp_source_timer_lower_to_lmqt(src); | |
1385 | } | |
1386 | } | |
1387 | } | |
1388 | ||
1389 | /* send group-and-source specific queries */ | |
1390 | group_retransmit_sources(group, 1 /* send_with_sflag_set=true */); | |
1391 | ||
1392 | /* make sure group retransmit timer is running */ | |
1393 | group_retransmit_timer_on(group); | |
1394 | } | |
1395 | ||
1396 | static void block_excl(struct igmp_group *group, | |
1397 | int num_sources, struct in_addr *sources) | |
1398 | { | |
1399 | int num_sources_tosend = 0; | |
1400 | int i; | |
1401 | ||
1402 | /* 1. clear off SEND flag from all known sources (X,Y) */ | |
1403 | source_clear_send_flag(group->group_source_list); | |
1404 | ||
1405 | /* 2. scan received sources (A) */ | |
1406 | for (i = 0; i < num_sources; ++i) { | |
1407 | struct igmp_source *source; | |
1408 | struct in_addr *src_addr; | |
1409 | ||
1410 | src_addr = sources + i; | |
1411 | ||
1412 | /* lookup reported source (A) in known sources (X,Y) */ | |
1413 | source = igmp_find_source_by_addr(group, *src_addr); | |
1414 | if (!source) { | |
1415 | /* 3: if not found, create source with Group Timer: (A-X-Y)=Group Timer */ | |
1416 | long group_timer_msec; | |
9bd7302f | 1417 | source = source_new(group, *src_addr); |
12e41d03 DL |
1418 | if (!source) { |
1419 | /* ugh, internal malloc failure, skip source */ | |
1420 | continue; | |
1421 | } | |
1422 | ||
1423 | zassert(!source->t_source_timer); /* timer == 0 */ | |
1424 | group_timer_msec = igmp_group_timer_remain_msec(group); | |
1425 | igmp_source_timer_on(group, source, group_timer_msec); | |
1426 | zassert(source->t_source_timer); /* (A-X-Y) timer > 0 */ | |
1427 | } | |
1428 | ||
1429 | if (source->t_source_timer) { | |
1430 | /* 4. if source timer>0 mark SEND flag: Q(G,A-Y) */ | |
1431 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
1432 | ++num_sources_tosend; | |
1433 | } | |
1434 | } | |
1435 | ||
1436 | /* 5. send sources marked with SEND flag: Q(G,A-Y) */ | |
1437 | if (num_sources_tosend > 0) { | |
1438 | source_query_send_by_flag(group, num_sources_tosend); | |
1439 | } | |
1440 | } | |
1441 | ||
1442 | static void block_incl(struct igmp_group *group, | |
1443 | int num_sources, struct in_addr *sources) | |
1444 | { | |
1445 | int num_sources_tosend = 0; | |
1446 | int i; | |
1447 | ||
1448 | /* 1. clear off SEND flag from all known sources (B) */ | |
1449 | source_clear_send_flag(group->group_source_list); | |
1450 | ||
1451 | /* 2. scan received sources (A) */ | |
1452 | for (i = 0; i < num_sources; ++i) { | |
1453 | struct igmp_source *source; | |
1454 | struct in_addr *src_addr; | |
1455 | ||
1456 | src_addr = sources + i; | |
1457 | ||
1458 | /* lookup reported source (A) in known sources (B) */ | |
1459 | source = igmp_find_source_by_addr(group, *src_addr); | |
1460 | if (source) { | |
1461 | /* 3. if found (A*B), mark SEND flag: Q(G,A*B) */ | |
1462 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
1463 | ++num_sources_tosend; | |
1464 | } | |
1465 | } | |
1466 | ||
1467 | /* 4. send sources marked with SEND flag: Q(G,A*B) */ | |
1468 | if (num_sources_tosend > 0) { | |
1469 | source_query_send_by_flag(group, num_sources_tosend); | |
1470 | } | |
1471 | } | |
1472 | ||
1473 | void igmpv3_report_block(struct igmp_sock *igmp, struct in_addr from, | |
1474 | struct in_addr group_addr, | |
1475 | int num_sources, struct in_addr *sources) | |
1476 | { | |
1477 | struct interface *ifp = igmp->interface; | |
1478 | struct igmp_group *group; | |
1479 | ||
1480 | on_trace(__PRETTY_FUNCTION__, | |
1481 | ifp, from, group_addr, num_sources, sources); | |
1482 | ||
1483 | /* non-existant group is created as INCLUDE {empty} */ | |
1484 | group = igmp_add_group_by_addr(igmp, group_addr, ifp->name); | |
1485 | if (!group) { | |
1486 | return; | |
1487 | } | |
1488 | ||
1489 | if (group->group_filtermode_isexcl) { | |
1490 | /* EXCLUDE mode */ | |
1491 | block_excl(group, num_sources, sources); | |
1492 | } | |
1493 | else { | |
1494 | /* INCLUDE mode */ | |
1495 | block_incl(group, num_sources, sources); | |
1496 | } | |
1497 | } | |
1498 | ||
1499 | void igmp_group_timer_lower_to_lmqt(struct igmp_group *group) | |
1500 | { | |
1501 | struct igmp_sock *igmp; | |
1502 | struct interface *ifp; | |
1503 | struct pim_interface *pim_ifp; | |
1504 | char *ifname; | |
1505 | int lmqi_dsec; /* Last Member Query Interval */ | |
1506 | int lmqc; /* Last Member Query Count */ | |
1507 | int lmqt_msec; /* Last Member Query Time */ | |
1508 | ||
1509 | /* | |
1510 | RFC 3376: 6.2.2. Definition of Group Timers | |
1511 | ||
1512 | The group timer is only used when a group is in EXCLUDE mode and | |
1513 | it represents the time for the *filter-mode* of the group to | |
1514 | expire and switch to INCLUDE mode. | |
1515 | */ | |
1516 | if (!group->group_filtermode_isexcl) { | |
1517 | return; | |
1518 | } | |
1519 | ||
1520 | igmp = group->group_igmp_sock; | |
1521 | ifp = igmp->interface; | |
1522 | pim_ifp = ifp->info; | |
1523 | ifname = ifp->name; | |
1524 | ||
1525 | lmqi_dsec = pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1526 | lmqc = igmp->querier_robustness_variable; | |
1527 | lmqt_msec = PIM_IGMP_LMQT_MSEC(lmqi_dsec, lmqc); /* lmqt_msec = (100 * lmqi_dsec) * lmqc */ | |
1528 | ||
1529 | if (PIM_DEBUG_IGMP_TRACE) { | |
1530 | char group_str[100]; | |
1531 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
1532 | zlog_debug("%s: group %s on %s: LMQC=%d LMQI=%d dsec LMQT=%d msec", | |
1533 | __PRETTY_FUNCTION__, | |
1534 | group_str, ifname, | |
1535 | lmqc, lmqi_dsec, lmqt_msec); | |
1536 | } | |
1537 | ||
1538 | zassert(group->group_filtermode_isexcl); | |
1539 | ||
1540 | igmp_group_timer_on(group, lmqt_msec, ifname); | |
1541 | } | |
1542 | ||
1543 | void igmp_source_timer_lower_to_lmqt(struct igmp_source *source) | |
1544 | { | |
1545 | struct igmp_group *group; | |
1546 | struct igmp_sock *igmp; | |
1547 | struct interface *ifp; | |
1548 | struct pim_interface *pim_ifp; | |
1549 | char *ifname; | |
1550 | int lmqi_dsec; /* Last Member Query Interval */ | |
1551 | int lmqc; /* Last Member Query Count */ | |
1552 | int lmqt_msec; /* Last Member Query Time */ | |
1553 | ||
1554 | group = source->source_group; | |
1555 | igmp = group->group_igmp_sock; | |
1556 | ifp = igmp->interface; | |
1557 | pim_ifp = ifp->info; | |
1558 | ifname = ifp->name; | |
1559 | ||
1560 | lmqi_dsec = pim_ifp->igmp_specific_query_max_response_time_dsec; | |
1561 | lmqc = igmp->querier_robustness_variable; | |
1562 | lmqt_msec = PIM_IGMP_LMQT_MSEC(lmqi_dsec, lmqc); /* lmqt_msec = (100 * lmqi_dsec) * lmqc */ | |
1563 | ||
1564 | if (PIM_DEBUG_IGMP_TRACE) { | |
1565 | char group_str[100]; | |
1566 | char source_str[100]; | |
1567 | pim_inet4_dump("<group?>", group->group_addr, group_str, sizeof(group_str)); | |
1568 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
1569 | zlog_debug("%s: group %s source %s on %s: LMQC=%d LMQI=%d dsec LMQT=%d msec", | |
1570 | __PRETTY_FUNCTION__, | |
1571 | group_str, source_str, ifname, | |
1572 | lmqc, lmqi_dsec, lmqt_msec); | |
1573 | } | |
1574 | ||
1575 | igmp_source_timer_on(group, source, lmqt_msec); | |
1576 | } | |
1577 | ||
1578 | /* | |
1579 | Copy sources to message: | |
1580 | ||
1581 | struct in_addr *sources = (struct in_addr *)(query_buf + IGMP_V3_SOURCES_OFFSET); | |
1582 | if (num_sources > 0) { | |
1583 | struct listnode *node; | |
1584 | struct igmp_source *src; | |
1585 | int i = 0; | |
1586 | ||
1587 | for (ALL_LIST_ELEMENTS_RO(source_list, node, src)) { | |
1588 | sources[i++] = src->source_addr; | |
1589 | } | |
1590 | } | |
1591 | */ | |
1592 | void pim_igmp_send_membership_query(struct igmp_group *group, | |
1593 | int fd, | |
1594 | const char *ifname, | |
1595 | char *query_buf, | |
1596 | int query_buf_size, | |
1597 | int num_sources, | |
1598 | struct in_addr dst_addr, | |
1599 | struct in_addr group_addr, | |
1600 | int query_max_response_time_dsec, | |
1601 | uint8_t s_flag, | |
1602 | uint8_t querier_robustness_variable, | |
1603 | uint16_t querier_query_interval) | |
1604 | { | |
1605 | ssize_t msg_size; | |
1606 | uint8_t max_resp_code; | |
1607 | uint8_t qqic; | |
1608 | ssize_t sent; | |
1609 | struct sockaddr_in to; | |
1610 | socklen_t tolen; | |
1611 | uint16_t checksum; | |
1612 | ||
1613 | zassert(num_sources >= 0); | |
1614 | ||
1615 | msg_size = IGMP_V3_SOURCES_OFFSET + (num_sources << 2); | |
1616 | if (msg_size > query_buf_size) { | |
1617 | zlog_err("%s %s: unable to send: msg_size=%zd larger than query_buf_size=%d", | |
1618 | __FILE__, __PRETTY_FUNCTION__, | |
1619 | msg_size, query_buf_size); | |
1620 | return; | |
1621 | } | |
1622 | ||
1623 | s_flag = PIM_FORCE_BOOLEAN(s_flag); | |
1624 | zassert((s_flag == 0) || (s_flag == 1)); | |
1625 | ||
1626 | max_resp_code = igmp_msg_encode16to8(query_max_response_time_dsec); | |
1627 | qqic = igmp_msg_encode16to8(querier_query_interval); | |
1628 | ||
1629 | /* | |
1630 | RFC 3376: 4.1.6. QRV (Querier's Robustness Variable) | |
1631 | ||
1632 | If non-zero, the QRV field contains the [Robustness Variable] | |
1633 | value used by the querier, i.e., the sender of the Query. If the | |
1634 | querier's [Robustness Variable] exceeds 7, the maximum value of | |
1635 | the QRV field, the QRV is set to zero. | |
1636 | */ | |
1637 | if (querier_robustness_variable > 7) { | |
1638 | querier_robustness_variable = 0; | |
1639 | } | |
1640 | ||
1641 | query_buf[0] = PIM_IGMP_MEMBERSHIP_QUERY; | |
1642 | query_buf[1] = max_resp_code; | |
1643 | *(uint16_t *)(query_buf + IGMP_V3_CHECKSUM_OFFSET) = 0; /* for computing checksum */ | |
1644 | memcpy(query_buf+4, &group_addr, sizeof(struct in_addr)); | |
1645 | ||
1646 | query_buf[8] = (s_flag << 3) | querier_robustness_variable; | |
1647 | query_buf[9] = qqic; | |
1648 | *(uint16_t *)(query_buf + IGMP_V3_NUMSOURCES_OFFSET) = htons(num_sources); | |
1649 | ||
1650 | checksum = in_cksum(query_buf, msg_size); | |
1651 | *(uint16_t *)(query_buf + IGMP_V3_CHECKSUM_OFFSET) = checksum; | |
1652 | ||
1653 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1654 | char dst_str[100]; | |
1655 | char group_str[100]; | |
1656 | pim_inet4_dump("<dst?>", dst_addr, dst_str, sizeof(dst_str)); | |
1657 | pim_inet4_dump("<group?>", group_addr, group_str, sizeof(group_str)); | |
1658 | 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", | |
1659 | __PRETTY_FUNCTION__, | |
1660 | dst_str, ifname, group_str, num_sources, | |
1661 | msg_size, s_flag, querier_robustness_variable, | |
1662 | querier_query_interval, qqic, checksum); | |
1663 | } | |
1664 | ||
1665 | #if 0 | |
1666 | memset(&to, 0, sizeof(to)); | |
1667 | #endif | |
1668 | to.sin_family = AF_INET; | |
1669 | to.sin_addr = dst_addr; | |
1670 | #if 0 | |
1671 | to.sin_port = htons(0); | |
1672 | #endif | |
1673 | tolen = sizeof(to); | |
1674 | ||
59e96cda DL |
1675 | sent = sendto(fd, query_buf, msg_size, MSG_DONTWAIT, |
1676 | (struct sockaddr *)&to, tolen); | |
12e41d03 DL |
1677 | if (sent != (ssize_t) msg_size) { |
1678 | int e = errno; | |
1679 | char dst_str[100]; | |
1680 | char group_str[100]; | |
1681 | pim_inet4_dump("<dst?>", dst_addr, dst_str, sizeof(dst_str)); | |
1682 | pim_inet4_dump("<group?>", group_addr, group_str, sizeof(group_str)); | |
1683 | if (sent < 0) { | |
1684 | zlog_warn("%s: sendto() failure to %s on %s: group=%s msg_size=%zd: errno=%d: %s", | |
1685 | __PRETTY_FUNCTION__, | |
1686 | dst_str, ifname, group_str, msg_size, | |
1687 | e, safe_strerror(e)); | |
1688 | } | |
1689 | else { | |
1690 | zlog_warn("%s: sendto() partial to %s on %s: group=%s msg_size=%zd: sent=%zd", | |
1691 | __PRETTY_FUNCTION__, | |
1692 | dst_str, ifname, group_str, | |
1693 | msg_size, sent); | |
1694 | } | |
1695 | return; | |
1696 | } | |
1697 | ||
1698 | /* | |
1699 | s_flag sanity test: s_flag must be set for general queries | |
1700 | ||
1701 | RFC 3376: 6.6.1. Timer Updates | |
1702 | ||
1703 | When a router sends or receives a query with a clear Suppress | |
1704 | Router-Side Processing flag, it must update its timers to reflect | |
1705 | the correct timeout values for the group or sources being queried. | |
1706 | ||
1707 | General queries don't trigger timer update. | |
1708 | */ | |
1709 | if (!s_flag) { | |
1710 | /* general query? */ | |
1711 | if (PIM_INADDR_IS_ANY(group_addr)) { | |
1712 | char dst_str[100]; | |
1713 | char group_str[100]; | |
1714 | pim_inet4_dump("<dst?>", dst_addr, dst_str, sizeof(dst_str)); | |
1715 | pim_inet4_dump("<group?>", group_addr, group_str, sizeof(group_str)); | |
1716 | zlog_warn("%s: to %s on %s: group=%s sources=%d: s_flag is clear for general query!", | |
1717 | __PRETTY_FUNCTION__, | |
1718 | dst_str, ifname, group_str, num_sources); | |
1719 | } | |
1720 | } | |
1721 | ||
1722 | } |