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Commit | Line | Data |
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12e41d03 | 1 | /* |
896014f4 DL |
2 | * PIM for Quagga |
3 | * Copyright (C) 2008 Everton da Silva Marques | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; see the file COPYING; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
12e41d03 DL |
19 | |
20 | #include <zebra.h> | |
21 | #include "log.h" | |
22 | #include "memory.h" | |
744d91b3 | 23 | #include "if.h" |
3613d898 | 24 | #include "lib_errors.h" |
12e41d03 DL |
25 | |
26 | #include "pimd.h" | |
27 | #include "pim_iface.h" | |
28 | #include "pim_igmp.h" | |
29 | #include "pim_igmpv3.h" | |
30 | #include "pim_str.h" | |
31 | #include "pim_util.h" | |
32 | #include "pim_time.h" | |
33 | #include "pim_zebra.h" | |
34 | #include "pim_oil.h" | |
35 | ||
a16db099 SG |
36 | static void group_retransmit_timer_on(struct gm_group *group); |
37 | static long igmp_group_timer_remain_msec(struct gm_group *group); | |
51700107 | 38 | static long igmp_source_timer_remain_msec(struct gm_source *source); |
a16db099 SG |
39 | static void group_query_send(struct gm_group *group); |
40 | static void source_query_send_by_flag(struct gm_group *group, | |
12e41d03 DL |
41 | int num_sources_tosend); |
42 | ||
d62a17ae | 43 | static void on_trace(const char *label, struct interface *ifp, |
44 | struct in_addr from, struct in_addr group_addr, | |
12e41d03 DL |
45 | int num_sources, struct in_addr *sources) |
46 | { | |
d62a17ae | 47 | if (PIM_DEBUG_IGMP_TRACE) { |
48 | char from_str[INET_ADDRSTRLEN]; | |
49 | char group_str[INET_ADDRSTRLEN]; | |
12e41d03 | 50 | |
d62a17ae | 51 | pim_inet4_dump("<from?>", from, from_str, sizeof(from_str)); |
52 | pim_inet4_dump("<group?>", group_addr, group_str, | |
53 | sizeof(group_str)); | |
12e41d03 | 54 | |
d62a17ae | 55 | zlog_debug("%s: from %s on %s: group=%s sources=%d", label, |
56 | from_str, ifp->name, group_str, num_sources); | |
57 | } | |
12e41d03 DL |
58 | } |
59 | ||
a16db099 | 60 | static inline long igmp_gmi_msec(struct gm_group *group) |
dda4d23c DL |
61 | { |
62 | struct pim_interface *pim_ifp = group->interface->info; | |
c5f76fad | 63 | struct gm_sock *igmp; |
dda4d23c DL |
64 | struct listnode *sock_node; |
65 | ||
66 | long qrv = 0, qqi = 0; | |
67 | ||
18adcff1 | 68 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->gm_socket_list, sock_node, igmp)) { |
dda4d23c DL |
69 | qrv = MAX(qrv, igmp->querier_robustness_variable); |
70 | qqi = MAX(qqi, igmp->querier_query_interval); | |
71 | } | |
72 | return PIM_IGMP_GMI_MSEC(qrv, qqi, | |
18adcff1 | 73 | pim_ifp->gm_query_max_response_time_dsec); |
dda4d23c DL |
74 | } |
75 | ||
a16db099 | 76 | void igmp_group_reset_gmi(struct gm_group *group) |
12e41d03 | 77 | { |
d62a17ae | 78 | long group_membership_interval_msec; |
d62a17ae | 79 | struct interface *ifp; |
80 | ||
dda4d23c | 81 | ifp = group->interface; |
d62a17ae | 82 | |
83 | /* | |
84 | RFC 3376: 8.4. Group Membership Interval | |
85 | ||
86 | The Group Membership Interval is the amount of time that must pass | |
87 | before a multicast router decides there are no more members of a | |
88 | group or a particular source on a network. | |
89 | ||
90 | This value MUST be ((the Robustness Variable) times (the Query | |
91 | Interval)) plus (one Query Response Interval). | |
92 | ||
93 | group_membership_interval_msec = querier_robustness_variable * | |
94 | (1000 * querier_query_interval) + | |
95 | 100 * query_response_interval_dsec; | |
96 | */ | |
dda4d23c | 97 | group_membership_interval_msec = igmp_gmi_msec(group); |
d62a17ae | 98 | |
99 | if (PIM_DEBUG_IGMP_TRACE) { | |
100 | char group_str[INET_ADDRSTRLEN]; | |
101 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
102 | sizeof(group_str)); | |
103 | zlog_debug( | |
104 | "Resetting group %s timer to GMI=%ld.%03ld sec on %s", | |
105 | group_str, group_membership_interval_msec / 1000, | |
106 | group_membership_interval_msec % 1000, ifp->name); | |
107 | } | |
108 | ||
109 | /* | |
110 | RFC 3376: 6.2.2. Definition of Group Timers | |
111 | ||
112 | The group timer is only used when a group is in EXCLUDE mode and | |
113 | it represents the time for the *filter-mode* of the group to | |
114 | expire and switch to INCLUDE mode. | |
115 | */ | |
df5dfb77 | 116 | assert(group->group_filtermode_isexcl); |
d62a17ae | 117 | |
118 | igmp_group_timer_on(group, group_membership_interval_msec, ifp->name); | |
12e41d03 DL |
119 | } |
120 | ||
121 | static int igmp_source_timer(struct thread *t) | |
122 | { | |
51700107 | 123 | struct gm_source *source; |
a16db099 | 124 | struct gm_group *group; |
d62a17ae | 125 | |
126 | source = THREAD_ARG(t); | |
127 | ||
128 | group = source->source_group; | |
129 | ||
130 | if (PIM_DEBUG_IGMP_TRACE) { | |
131 | char group_str[INET_ADDRSTRLEN]; | |
132 | char source_str[INET_ADDRSTRLEN]; | |
133 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
134 | sizeof(group_str)); | |
135 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
136 | sizeof(source_str)); | |
137 | zlog_debug( | |
138 | "%s: Source timer expired for group %s source %s on %s", | |
15569c58 | 139 | __func__, group_str, source_str, |
dda4d23c | 140 | group->interface->name); |
d62a17ae | 141 | } |
142 | ||
143 | /* | |
144 | RFC 3376: 6.3. IGMPv3 Source-Specific Forwarding Rules | |
145 | ||
146 | Group | |
147 | Filter-Mode Source Timer Value Action | |
148 | ----------- ------------------ ------ | |
149 | INCLUDE TIMER == 0 Suggest to stop forwarding | |
150 | traffic from source and | |
151 | remove source record. If | |
152 | there are no more source | |
153 | records for the group, delete | |
154 | group record. | |
155 | ||
156 | EXCLUDE TIMER == 0 Suggest to not forward | |
157 | traffic from source | |
158 | (DO NOT remove record) | |
159 | ||
160 | Source timer switched from (T > 0) to (T == 0): disable forwarding. | |
161 | */ | |
162 | ||
163 | if (group->group_filtermode_isexcl) { | |
164 | /* EXCLUDE mode */ | |
165 | ||
166 | igmp_source_forward_stop(source); | |
167 | } else { | |
168 | /* INCLUDE mode */ | |
169 | ||
170 | /* igmp_source_delete() will stop forwarding source */ | |
171 | igmp_source_delete(source); | |
172 | ||
173 | /* | |
174 | If there are no more source records for the group, delete | |
175 | group | |
176 | record. | |
177 | */ | |
178 | if (!listcount(group->group_source_list)) { | |
179 | igmp_group_delete_empty_include(group); | |
180 | } | |
181 | } | |
182 | ||
183 | return 0; | |
12e41d03 DL |
184 | } |
185 | ||
a16db099 | 186 | static void source_timer_off(struct gm_group *group, struct gm_source *source) |
12e41d03 | 187 | { |
d62a17ae | 188 | if (!source->t_source_timer) |
189 | return; | |
190 | ||
191 | if (PIM_DEBUG_IGMP_TRACE) { | |
192 | char group_str[INET_ADDRSTRLEN]; | |
193 | char source_str[INET_ADDRSTRLEN]; | |
194 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
195 | sizeof(group_str)); | |
196 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
197 | sizeof(source_str)); | |
198 | zlog_debug( | |
199 | "Cancelling TIMER event for group %s source %s on %s", | |
a1a4295a | 200 | group_str, source_str, group->interface->name); |
d62a17ae | 201 | } |
202 | ||
203 | THREAD_OFF(source->t_source_timer); | |
12e41d03 DL |
204 | } |
205 | ||
a16db099 | 206 | static void igmp_source_timer_on(struct gm_group *group, |
51700107 | 207 | struct gm_source *source, long interval_msec) |
12e41d03 | 208 | { |
d62a17ae | 209 | source_timer_off(group, source); |
dda4d23c | 210 | struct pim_interface *pim_ifp = group->interface->info; |
d62a17ae | 211 | |
212 | if (PIM_DEBUG_IGMP_EVENTS) { | |
213 | char group_str[INET_ADDRSTRLEN]; | |
214 | char source_str[INET_ADDRSTRLEN]; | |
215 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
216 | sizeof(group_str)); | |
217 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
218 | sizeof(source_str)); | |
219 | zlog_debug( | |
220 | "Scheduling %ld.%03ld sec TIMER event for group %s source %s on %s", | |
221 | interval_msec / 1000, interval_msec % 1000, group_str, | |
dda4d23c | 222 | source_str, group->interface->name); |
d62a17ae | 223 | } |
224 | ||
36417fcc DS |
225 | thread_add_timer_msec(router->master, igmp_source_timer, source, |
226 | interval_msec, &source->t_source_timer); | |
d62a17ae | 227 | |
228 | /* | |
229 | RFC 3376: 6.3. IGMPv3 Source-Specific Forwarding Rules | |
230 | ||
231 | Source timer switched from (T == 0) to (T > 0): enable forwarding. | |
232 | */ | |
e52e3223 | 233 | igmp_source_forward_start(pim_ifp->pim, source); |
12e41d03 DL |
234 | } |
235 | ||
a16db099 | 236 | void igmp_source_reset_gmi(struct gm_group *group, struct gm_source *source) |
12e41d03 | 237 | { |
d62a17ae | 238 | long group_membership_interval_msec; |
d62a17ae | 239 | struct interface *ifp; |
240 | ||
dda4d23c | 241 | ifp = group->interface; |
d62a17ae | 242 | |
dda4d23c | 243 | group_membership_interval_msec = igmp_gmi_msec(group); |
d62a17ae | 244 | |
245 | if (PIM_DEBUG_IGMP_TRACE) { | |
246 | char group_str[INET_ADDRSTRLEN]; | |
247 | char source_str[INET_ADDRSTRLEN]; | |
248 | ||
249 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
250 | sizeof(group_str)); | |
251 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
252 | sizeof(source_str)); | |
253 | ||
254 | zlog_debug( | |
255 | "Resetting source %s timer to GMI=%ld.%03ld sec for group %s on %s", | |
256 | source_str, group_membership_interval_msec / 1000, | |
257 | group_membership_interval_msec % 1000, group_str, | |
258 | ifp->name); | |
259 | } | |
260 | ||
261 | igmp_source_timer_on(group, source, group_membership_interval_msec); | |
12e41d03 DL |
262 | } |
263 | ||
a16db099 | 264 | static void source_mark_delete_flag(struct gm_group *group) |
12e41d03 | 265 | { |
d62a17ae | 266 | struct listnode *src_node; |
51700107 | 267 | struct gm_source *src; |
12e41d03 | 268 | |
d62a17ae | 269 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { |
270 | IGMP_SOURCE_DO_DELETE(src->source_flags); | |
271 | } | |
12e41d03 DL |
272 | } |
273 | ||
a16db099 | 274 | static void source_mark_send_flag(struct gm_group *group) |
12e41d03 | 275 | { |
d62a17ae | 276 | struct listnode *src_node; |
51700107 | 277 | struct gm_source *src; |
12e41d03 | 278 | |
d62a17ae | 279 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { |
280 | IGMP_SOURCE_DO_SEND(src->source_flags); | |
281 | } | |
12e41d03 DL |
282 | } |
283 | ||
a16db099 | 284 | static int source_mark_send_flag_by_timer(struct gm_group *group) |
12e41d03 | 285 | { |
d62a17ae | 286 | struct listnode *src_node; |
51700107 | 287 | struct gm_source *src; |
d62a17ae | 288 | int num_marked_sources = 0; |
289 | ||
290 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { | |
291 | /* Is source timer running? */ | |
292 | if (src->t_source_timer) { | |
293 | IGMP_SOURCE_DO_SEND(src->source_flags); | |
294 | ++num_marked_sources; | |
295 | } else { | |
296 | IGMP_SOURCE_DONT_SEND(src->source_flags); | |
297 | } | |
298 | } | |
299 | ||
300 | return num_marked_sources; | |
12e41d03 DL |
301 | } |
302 | ||
303 | static void source_clear_send_flag(struct list *source_list) | |
304 | { | |
d62a17ae | 305 | struct listnode *src_node; |
51700107 | 306 | struct gm_source *src; |
12e41d03 | 307 | |
d62a17ae | 308 | for (ALL_LIST_ELEMENTS_RO(source_list, src_node, src)) { |
309 | IGMP_SOURCE_DONT_SEND(src->source_flags); | |
310 | } | |
12e41d03 DL |
311 | } |
312 | ||
313 | /* | |
314 | Any source (*,G) is forwarded only if mode is EXCLUDE {empty} | |
315 | */ | |
a16db099 | 316 | static void group_exclude_fwd_anysrc_ifempty(struct gm_group *group) |
12e41d03 | 317 | { |
dda4d23c | 318 | struct pim_interface *pim_ifp = group->interface->info; |
e52e3223 | 319 | |
df5dfb77 | 320 | assert(group->group_filtermode_isexcl); |
12e41d03 | 321 | |
d62a17ae | 322 | if (listcount(group->group_source_list) < 1) { |
e52e3223 | 323 | igmp_anysource_forward_start(pim_ifp->pim, group); |
d62a17ae | 324 | } |
12e41d03 DL |
325 | } |
326 | ||
51700107 | 327 | void igmp_source_free(struct gm_source *source) |
12e41d03 | 328 | { |
d62a17ae | 329 | /* make sure there is no source timer running */ |
df5dfb77 | 330 | assert(!source->t_source_timer); |
12e41d03 | 331 | |
d62a17ae | 332 | XFREE(MTYPE_PIM_IGMP_GROUP_SOURCE, source); |
12e41d03 DL |
333 | } |
334 | ||
51700107 | 335 | static void source_channel_oil_detach(struct gm_source *source) |
12e41d03 | 336 | { |
d62a17ae | 337 | if (source->source_channel_oil) { |
15569c58 | 338 | pim_channel_oil_del(source->source_channel_oil, __func__); |
d62a17ae | 339 | source->source_channel_oil = NULL; |
340 | } | |
12e41d03 DL |
341 | } |
342 | ||
343 | /* | |
344 | igmp_source_delete: stop fowarding, and delete the source | |
345 | igmp_source_forward_stop: stop fowarding, but keep the source | |
346 | */ | |
51700107 | 347 | void igmp_source_delete(struct gm_source *source) |
12e41d03 | 348 | { |
a16db099 | 349 | struct gm_group *group; |
d62a17ae | 350 | struct in_addr src; |
351 | ||
352 | group = source->source_group; | |
353 | ||
354 | if (PIM_DEBUG_IGMP_TRACE) { | |
355 | char group_str[INET_ADDRSTRLEN]; | |
356 | char source_str[INET_ADDRSTRLEN]; | |
357 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
358 | sizeof(group_str)); | |
359 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
360 | sizeof(source_str)); | |
361 | zlog_debug( | |
dda4d23c | 362 | "Deleting IGMP source %s for group %s from interface %s c_oil ref_count %d", |
a1a4295a | 363 | source_str, group_str, group->interface->name, |
d62a17ae | 364 | source->source_channel_oil |
365 | ? source->source_channel_oil->oil_ref_count | |
366 | : 0); | |
367 | } | |
368 | ||
369 | source_timer_off(group, source); | |
370 | igmp_source_forward_stop(source); | |
371 | ||
372 | /* sanity check that forwarding has been disabled */ | |
373 | if (IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
374 | char group_str[INET_ADDRSTRLEN]; | |
375 | char source_str[INET_ADDRSTRLEN]; | |
376 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
377 | sizeof(group_str)); | |
378 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
379 | sizeof(source_str)); | |
380 | zlog_warn( | |
dda4d23c | 381 | "%s: forwarding=ON(!) IGMP source %s for group %s from interface %s", |
15569c58 | 382 | __func__, source_str, group_str, |
dda4d23c | 383 | group->interface->name); |
d62a17ae | 384 | /* warning only */ |
385 | } | |
386 | ||
387 | source_channel_oil_detach(source); | |
388 | ||
389 | /* | |
390 | notice that listnode_delete() can't be moved | |
391 | into igmp_source_free() because the later is | |
392 | called by list_delete_all_node() | |
393 | */ | |
394 | listnode_delete(group->group_source_list, source); | |
395 | ||
396 | src.s_addr = source->source_addr.s_addr; | |
397 | igmp_source_free(source); | |
398 | ||
399 | /* Group source list is empty and current source is * then | |
400 | *,G group going away so do not trigger start */ | |
401 | if (group->group_filtermode_isexcl | |
402 | && (listcount(group->group_source_list) != 0) | |
403 | && src.s_addr != INADDR_ANY) { | |
404 | group_exclude_fwd_anysrc_ifempty(group); | |
405 | } | |
12e41d03 DL |
406 | } |
407 | ||
408 | static void source_delete_by_flag(struct list *source_list) | |
409 | { | |
d62a17ae | 410 | struct listnode *src_node; |
411 | struct listnode *src_nextnode; | |
51700107 | 412 | struct gm_source *src; |
d62a17ae | 413 | |
414 | for (ALL_LIST_ELEMENTS(source_list, src_node, src_nextnode, src)) | |
415 | if (IGMP_SOURCE_TEST_DELETE(src->source_flags)) | |
416 | igmp_source_delete(src); | |
12e41d03 DL |
417 | } |
418 | ||
419 | void igmp_source_delete_expired(struct list *source_list) | |
420 | { | |
d62a17ae | 421 | struct listnode *src_node; |
422 | struct listnode *src_nextnode; | |
51700107 | 423 | struct gm_source *src; |
d62a17ae | 424 | |
425 | for (ALL_LIST_ELEMENTS(source_list, src_node, src_nextnode, src)) | |
426 | if (!src->t_source_timer) | |
427 | igmp_source_delete(src); | |
12e41d03 DL |
428 | } |
429 | ||
a16db099 SG |
430 | struct gm_source *igmp_find_source_by_addr(struct gm_group *group, |
431 | struct in_addr src_addr) | |
12e41d03 | 432 | { |
d62a17ae | 433 | struct listnode *src_node; |
51700107 | 434 | struct gm_source *src; |
12e41d03 | 435 | |
d62a17ae | 436 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) |
437 | if (src_addr.s_addr == src->source_addr.s_addr) | |
438 | return src; | |
12e41d03 | 439 | |
d62a17ae | 440 | return 0; |
12e41d03 DL |
441 | } |
442 | ||
a16db099 SG |
443 | struct gm_source *igmp_get_source_by_addr(struct gm_group *group, |
444 | struct in_addr src_addr, bool *new) | |
12e41d03 | 445 | { |
51700107 | 446 | struct gm_source *src; |
d62a17ae | 447 | |
5421bf8f DL |
448 | if (new) |
449 | *new = false; | |
450 | ||
451 | src = igmp_find_source_by_addr(group, src_addr); | |
452 | if (src) | |
453 | return src; | |
454 | ||
d62a17ae | 455 | if (PIM_DEBUG_IGMP_TRACE) { |
456 | char group_str[INET_ADDRSTRLEN]; | |
457 | char source_str[INET_ADDRSTRLEN]; | |
458 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
459 | sizeof(group_str)); | |
460 | pim_inet4_dump("<source?>", src_addr, source_str, | |
461 | sizeof(source_str)); | |
462 | zlog_debug( | |
dda4d23c DL |
463 | "Creating new IGMP source %s for group %s on interface %s", |
464 | source_str, group_str, group->interface->name); | |
d62a17ae | 465 | } |
466 | ||
467 | src = XCALLOC(MTYPE_PIM_IGMP_GROUP_SOURCE, sizeof(*src)); | |
d62a17ae | 468 | |
469 | src->t_source_timer = NULL; | |
470 | src->source_group = group; /* back pointer */ | |
471 | src->source_addr = src_addr; | |
472 | src->source_creation = pim_time_monotonic_sec(); | |
473 | src->source_flags = 0; | |
474 | src->source_query_retransmit_count = 0; | |
475 | src->source_channel_oil = NULL; | |
476 | ||
477 | listnode_add(group->group_source_list, src); | |
478 | ||
479 | /* Any source (*,G) is forwarded only if mode is EXCLUDE {empty} */ | |
480 | igmp_anysource_forward_stop(group); | |
d62a17ae | 481 | return src; |
12e41d03 DL |
482 | } |
483 | ||
c5f76fad | 484 | static void allow(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 485 | struct in_addr group_addr, int num_sources, |
486 | struct in_addr *sources) | |
12e41d03 | 487 | { |
51700107 | 488 | struct gm_source *source; |
a16db099 | 489 | struct gm_group *group; |
d62a17ae | 490 | int i; |
491 | ||
fcf5d438 SG |
492 | if (num_sources == 0) { |
493 | /* | |
494 | RFC 3376: 3.1. Socket-State | |
495 | If the requested filter mode is INCLUDE *and* the requested | |
496 | source list is empty, then the entry corresponding to the | |
497 | requested interface and multicast address is deleted if | |
498 | present. If no such entry is present, the request is ignored. | |
499 | So, deleting the group present. | |
500 | */ | |
501 | group = find_group_by_addr(igmp, group_addr); | |
26d0cbbb JAG |
502 | if (!group) { |
503 | return; | |
504 | } | |
505 | if (group->group_filtermode_isexcl) { | |
506 | if (listcount(group->group_source_list) == 1) { | |
507 | struct in_addr star = {.s_addr = INADDR_ANY}; | |
508 | ||
509 | source = igmp_find_source_by_addr(group, star); | |
510 | if (source) | |
dda4d23c | 511 | igmp_source_reset_gmi(group, source); |
26d0cbbb JAG |
512 | } |
513 | } else { | |
fcf5d438 | 514 | igmp_group_delete(group); |
26d0cbbb JAG |
515 | } |
516 | ||
fcf5d438 SG |
517 | return; |
518 | } | |
519 | ||
d62a17ae | 520 | /* non-existant group is created as INCLUDE {empty} */ |
521 | group = igmp_add_group_by_addr(igmp, group_addr); | |
522 | if (!group) { | |
523 | return; | |
524 | } | |
525 | ||
526 | /* scan received sources */ | |
527 | for (i = 0; i < num_sources; ++i) { | |
528 | struct in_addr *src_addr; | |
529 | ||
530 | src_addr = sources + i; | |
531 | ||
5421bf8f DL |
532 | source = igmp_get_source_by_addr(group, *src_addr, NULL); |
533 | if (!source) | |
d62a17ae | 534 | continue; |
d62a17ae | 535 | |
536 | /* | |
537 | RFC 3376: 6.4.1. Reception of Current-State Records | |
538 | ||
539 | When receiving IS_IN reports for groups in EXCLUDE mode is | |
540 | sources should be moved from set with (timers = 0) to set with | |
541 | (timers > 0). | |
542 | ||
543 | igmp_source_reset_gmi() below, resetting the source timers to | |
544 | GMI, accomplishes this. | |
545 | */ | |
dda4d23c | 546 | igmp_source_reset_gmi(group, source); |
d62a17ae | 547 | |
548 | } /* scan received sources */ | |
12e41d03 DL |
549 | } |
550 | ||
c5f76fad | 551 | void igmpv3_report_isin(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 552 | struct in_addr group_addr, int num_sources, |
553 | struct in_addr *sources) | |
12e41d03 | 554 | { |
15569c58 DA |
555 | on_trace(__func__, igmp->interface, from, group_addr, num_sources, |
556 | sources); | |
12e41d03 | 557 | |
d62a17ae | 558 | allow(igmp, from, group_addr, num_sources, sources); |
12e41d03 DL |
559 | } |
560 | ||
a16db099 | 561 | static void isex_excl(struct gm_group *group, int num_sources, |
d62a17ae | 562 | struct in_addr *sources) |
12e41d03 | 563 | { |
51700107 | 564 | struct gm_source *source; |
d62a17ae | 565 | int i; |
566 | ||
567 | /* EXCLUDE mode */ | |
df5dfb77 | 568 | assert(group->group_filtermode_isexcl); |
d62a17ae | 569 | |
570 | /* E.1: set deletion flag for known sources (X,Y) */ | |
571 | source_mark_delete_flag(group); | |
572 | ||
573 | /* scan received sources (A) */ | |
574 | for (i = 0; i < num_sources; ++i) { | |
575 | struct in_addr *src_addr; | |
5421bf8f | 576 | bool new; |
d62a17ae | 577 | |
578 | src_addr = sources + i; | |
579 | ||
580 | /* E.2: lookup reported source from (A) in (X,Y) */ | |
5421bf8f DL |
581 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
582 | if (!source) | |
583 | continue; | |
584 | ||
585 | if (!new) { | |
d62a17ae | 586 | /* E.3: if found, clear deletion flag: (X*A) or (Y*A) */ |
587 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
588 | } else { | |
589 | /* E.4: if not found, create source with timer=GMI: | |
590 | * (A-X-Y) */ | |
df5dfb77 | 591 | assert(!source->t_source_timer); /* timer == 0 */ |
dda4d23c | 592 | igmp_source_reset_gmi(group, source); |
df5dfb77 | 593 | assert(source->t_source_timer); /* (A-X-Y) timer > 0 */ |
d62a17ae | 594 | } |
595 | ||
596 | } /* scan received sources */ | |
597 | ||
598 | /* | |
599 | * If we are in isexcl mode and num_sources == 0 | |
600 | * than that means we have a *,g entry that | |
601 | * needs to be handled | |
602 | */ | |
603 | if (group->group_filtermode_isexcl && num_sources == 0) { | |
604 | struct in_addr star = {.s_addr = INADDR_ANY}; | |
605 | source = igmp_find_source_by_addr(group, star); | |
606 | if (source) { | |
607 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
dda4d23c | 608 | igmp_source_reset_gmi(group, source); |
d62a17ae | 609 | } |
610 | } | |
611 | ||
612 | /* E.5: delete all sources marked with deletion flag: (X-A) and (Y-A) */ | |
613 | source_delete_by_flag(group->group_source_list); | |
12e41d03 DL |
614 | } |
615 | ||
a16db099 | 616 | static void isex_incl(struct gm_group *group, int num_sources, |
d62a17ae | 617 | struct in_addr *sources) |
12e41d03 | 618 | { |
d62a17ae | 619 | int i; |
620 | ||
621 | /* INCLUDE mode */ | |
df5dfb77 | 622 | assert(!group->group_filtermode_isexcl); |
d62a17ae | 623 | |
624 | /* I.1: set deletion flag for known sources (A) */ | |
625 | source_mark_delete_flag(group); | |
626 | ||
627 | /* scan received sources (B) */ | |
628 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 629 | struct gm_source *source; |
d62a17ae | 630 | struct in_addr *src_addr; |
5421bf8f | 631 | bool new; |
d62a17ae | 632 | |
633 | src_addr = sources + i; | |
634 | ||
635 | /* I.2: lookup reported source (B) */ | |
5421bf8f DL |
636 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
637 | if (!source) | |
638 | continue; | |
639 | ||
640 | if (!new) { | |
d62a17ae | 641 | /* I.3: if found, clear deletion flag (A*B) */ |
642 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
643 | } else { | |
644 | /* I.4: if not found, create source with timer=0 (B-A) | |
645 | */ | |
df5dfb77 | 646 | assert(!source->t_source_timer); /* (B-A) timer=0 */ |
d62a17ae | 647 | } |
648 | ||
649 | } /* scan received sources */ | |
650 | ||
651 | /* I.5: delete all sources marked with deletion flag (A-B) */ | |
652 | source_delete_by_flag(group->group_source_list); | |
653 | ||
654 | group->group_filtermode_isexcl = 1; /* boolean=true */ | |
655 | ||
df5dfb77 | 656 | assert(group->group_filtermode_isexcl); |
d62a17ae | 657 | |
658 | group_exclude_fwd_anysrc_ifempty(group); | |
12e41d03 DL |
659 | } |
660 | ||
c5f76fad | 661 | void igmpv3_report_isex(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 662 | struct in_addr group_addr, int num_sources, |
663 | struct in_addr *sources, int from_igmp_v2_report) | |
12e41d03 | 664 | { |
d62a17ae | 665 | struct interface *ifp = igmp->interface; |
a16db099 | 666 | struct gm_group *group; |
d62a17ae | 667 | |
15569c58 | 668 | on_trace(__func__, ifp, from, group_addr, num_sources, sources); |
d62a17ae | 669 | |
b0f525a8 QY |
670 | if (pim_is_group_filtered(ifp->info, &group_addr)) |
671 | return; | |
672 | ||
d62a17ae | 673 | /* non-existant group is created as INCLUDE {empty} */ |
674 | group = igmp_add_group_by_addr(igmp, group_addr); | |
675 | if (!group) { | |
676 | return; | |
677 | } | |
678 | ||
679 | /* So we can display how we learned the group in our show command output | |
680 | */ | |
681 | if (from_igmp_v2_report) | |
682 | group->igmp_version = 2; | |
683 | ||
684 | if (group->group_filtermode_isexcl) { | |
685 | /* EXCLUDE mode */ | |
686 | isex_excl(group, num_sources, sources); | |
687 | } else { | |
688 | /* INCLUDE mode */ | |
689 | isex_incl(group, num_sources, sources); | |
df5dfb77 | 690 | assert(group->group_filtermode_isexcl); |
d62a17ae | 691 | } |
692 | ||
df5dfb77 | 693 | assert(group->group_filtermode_isexcl); |
d62a17ae | 694 | |
695 | igmp_group_reset_gmi(group); | |
12e41d03 DL |
696 | } |
697 | ||
a16db099 | 698 | static void toin_incl(struct gm_group *group, int num_sources, |
d62a17ae | 699 | struct in_addr *sources) |
12e41d03 | 700 | { |
d62a17ae | 701 | int num_sources_tosend = listcount(group->group_source_list); |
702 | int i; | |
703 | ||
704 | /* Set SEND flag for all known sources (A) */ | |
705 | source_mark_send_flag(group); | |
706 | ||
707 | /* Scan received sources (B) */ | |
708 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 709 | struct gm_source *source; |
d62a17ae | 710 | struct in_addr *src_addr; |
5421bf8f | 711 | bool new; |
d62a17ae | 712 | |
713 | src_addr = sources + i; | |
714 | ||
715 | /* Lookup reported source (B) */ | |
5421bf8f DL |
716 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
717 | if (!source) | |
718 | continue; | |
719 | ||
720 | if (!new) { | |
d62a17ae | 721 | /* If found, clear SEND flag (A*B) */ |
722 | IGMP_SOURCE_DONT_SEND(source->source_flags); | |
723 | --num_sources_tosend; | |
d62a17ae | 724 | } |
725 | ||
726 | /* (B)=GMI */ | |
dda4d23c | 727 | igmp_source_reset_gmi(group, source); |
d62a17ae | 728 | } |
729 | ||
730 | /* Send sources marked with SEND flag: Q(G,A-B) */ | |
731 | if (num_sources_tosend > 0) { | |
732 | source_query_send_by_flag(group, num_sources_tosend); | |
733 | } | |
12e41d03 DL |
734 | } |
735 | ||
a16db099 | 736 | static void toin_excl(struct gm_group *group, int num_sources, |
d62a17ae | 737 | struct in_addr *sources) |
12e41d03 | 738 | { |
d62a17ae | 739 | int num_sources_tosend; |
740 | int i; | |
741 | ||
742 | /* Set SEND flag for X (sources with timer > 0) */ | |
743 | num_sources_tosend = source_mark_send_flag_by_timer(group); | |
744 | ||
745 | /* Scan received sources (A) */ | |
746 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 747 | struct gm_source *source; |
d62a17ae | 748 | struct in_addr *src_addr; |
5421bf8f | 749 | bool new; |
d62a17ae | 750 | |
751 | src_addr = sources + i; | |
752 | ||
753 | /* Lookup reported source (A) */ | |
5421bf8f DL |
754 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
755 | if (!source) | |
756 | continue; | |
757 | ||
758 | if (source->t_source_timer) { | |
759 | /* If found and timer running, clear SEND flag | |
760 | * (X*A) */ | |
761 | IGMP_SOURCE_DONT_SEND(source->source_flags); | |
762 | --num_sources_tosend; | |
d62a17ae | 763 | } |
764 | ||
765 | /* (A)=GMI */ | |
dda4d23c | 766 | igmp_source_reset_gmi(group, source); |
d62a17ae | 767 | } |
768 | ||
769 | /* Send sources marked with SEND flag: Q(G,X-A) */ | |
770 | if (num_sources_tosend > 0) { | |
771 | source_query_send_by_flag(group, num_sources_tosend); | |
772 | } | |
773 | ||
774 | /* Send Q(G) */ | |
775 | group_query_send(group); | |
12e41d03 DL |
776 | } |
777 | ||
c5f76fad | 778 | void igmpv3_report_toin(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 779 | struct in_addr group_addr, int num_sources, |
780 | struct in_addr *sources) | |
12e41d03 | 781 | { |
d62a17ae | 782 | struct interface *ifp = igmp->interface; |
a16db099 | 783 | struct gm_group *group; |
d62a17ae | 784 | |
15569c58 | 785 | on_trace(__func__, ifp, from, group_addr, num_sources, sources); |
d62a17ae | 786 | |
787 | /* | |
788 | * If the requested filter mode is INCLUDE *and* the requested source | |
789 | * list is empty, then the entry corresponding to the requested | |
790 | * interface and multicast address is deleted if present. If no such | |
791 | * entry is present, the request is ignored. | |
792 | */ | |
793 | if (num_sources) { | |
794 | /* non-existant group is created as INCLUDE {empty} */ | |
795 | group = igmp_add_group_by_addr(igmp, group_addr); | |
796 | if (!group) { | |
797 | return; | |
798 | } | |
799 | } else { | |
800 | group = find_group_by_addr(igmp, group_addr); | |
801 | if (!group) | |
802 | return; | |
803 | } | |
804 | ||
805 | if (group->group_filtermode_isexcl) { | |
806 | /* EXCLUDE mode */ | |
807 | toin_excl(group, num_sources, sources); | |
808 | } else { | |
809 | /* INCLUDE mode */ | |
810 | toin_incl(group, num_sources, sources); | |
811 | } | |
12e41d03 DL |
812 | } |
813 | ||
a16db099 | 814 | static void toex_incl(struct gm_group *group, int num_sources, |
d62a17ae | 815 | struct in_addr *sources) |
12e41d03 | 816 | { |
d62a17ae | 817 | int num_sources_tosend = 0; |
818 | int i; | |
819 | ||
df5dfb77 | 820 | assert(!group->group_filtermode_isexcl); |
d62a17ae | 821 | |
822 | /* Set DELETE flag for all known sources (A) */ | |
823 | source_mark_delete_flag(group); | |
824 | ||
825 | /* Clear off SEND flag from all known sources (A) */ | |
826 | source_clear_send_flag(group->group_source_list); | |
827 | ||
828 | /* Scan received sources (B) */ | |
829 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 830 | struct gm_source *source; |
d62a17ae | 831 | struct in_addr *src_addr; |
5421bf8f | 832 | bool new; |
d62a17ae | 833 | |
834 | src_addr = sources + i; | |
835 | ||
836 | /* Lookup reported source (B) */ | |
5421bf8f DL |
837 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
838 | if (!new) { | |
d62a17ae | 839 | /* If found, clear deletion flag: (A*B) */ |
840 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
841 | /* and set SEND flag (A*B) */ | |
842 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
843 | ++num_sources_tosend; | |
d62a17ae | 844 | } |
845 | ||
846 | } /* Scan received sources (B) */ | |
847 | ||
848 | group->group_filtermode_isexcl = 1; /* boolean=true */ | |
849 | ||
850 | /* Delete all sources marked with DELETE flag (A-B) */ | |
851 | source_delete_by_flag(group->group_source_list); | |
852 | ||
853 | /* Send sources marked with SEND flag: Q(G,A*B) */ | |
854 | if (num_sources_tosend > 0) { | |
855 | source_query_send_by_flag(group, num_sources_tosend); | |
856 | } | |
857 | ||
df5dfb77 | 858 | assert(group->group_filtermode_isexcl); |
d62a17ae | 859 | |
860 | group_exclude_fwd_anysrc_ifempty(group); | |
12e41d03 DL |
861 | } |
862 | ||
a16db099 | 863 | static void toex_excl(struct gm_group *group, int num_sources, |
d62a17ae | 864 | struct in_addr *sources) |
12e41d03 | 865 | { |
d62a17ae | 866 | int num_sources_tosend = 0; |
867 | int i; | |
868 | ||
869 | /* set DELETE flag for all known sources (X,Y) */ | |
870 | source_mark_delete_flag(group); | |
871 | ||
872 | /* clear off SEND flag from all known sources (X,Y) */ | |
873 | source_clear_send_flag(group->group_source_list); | |
874 | ||
875 | if (num_sources == 0) { | |
51700107 | 876 | struct gm_source *source; |
d62a17ae | 877 | struct in_addr any = {.s_addr = INADDR_ANY}; |
878 | ||
879 | source = igmp_find_source_by_addr(group, any); | |
880 | if (source) | |
881 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
882 | } | |
883 | ||
884 | /* scan received sources (A) */ | |
885 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 886 | struct gm_source *source; |
d62a17ae | 887 | struct in_addr *src_addr; |
5421bf8f | 888 | bool new; |
d62a17ae | 889 | |
890 | src_addr = sources + i; | |
891 | ||
892 | /* lookup reported source (A) in known sources (X,Y) */ | |
5421bf8f DL |
893 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
894 | if (!source) | |
895 | continue; | |
896 | ||
897 | if (!new) { | |
d62a17ae | 898 | /* if found, clear off DELETE flag from reported source |
899 | * (A) */ | |
900 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
901 | } else { | |
902 | /* if not found, create source with Group Timer: | |
903 | * (A-X-Y)=Group Timer */ | |
904 | long group_timer_msec; | |
d62a17ae | 905 | |
df5dfb77 | 906 | assert(!source->t_source_timer); /* timer == 0 */ |
d62a17ae | 907 | group_timer_msec = igmp_group_timer_remain_msec(group); |
908 | igmp_source_timer_on(group, source, group_timer_msec); | |
df5dfb77 | 909 | assert(source->t_source_timer); /* (A-X-Y) timer > 0 */ |
d62a17ae | 910 | |
911 | /* make sure source is created with DELETE flag unset */ | |
df5dfb77 | 912 | assert(!IGMP_SOURCE_TEST_DELETE(source->source_flags)); |
d62a17ae | 913 | } |
914 | ||
915 | /* make sure reported source has DELETE flag unset */ | |
df5dfb77 | 916 | assert(!IGMP_SOURCE_TEST_DELETE(source->source_flags)); |
d62a17ae | 917 | |
918 | if (source->t_source_timer) { | |
919 | /* if source timer>0 mark SEND flag: Q(G,A-Y) */ | |
920 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
921 | ++num_sources_tosend; | |
922 | } | |
923 | ||
924 | } /* scan received sources (A) */ | |
925 | ||
926 | /* | |
927 | delete all sources marked with DELETE flag: | |
928 | Delete (X-A) | |
929 | Delete (Y-A) | |
930 | */ | |
931 | source_delete_by_flag(group->group_source_list); | |
932 | ||
933 | /* send sources marked with SEND flag: Q(G,A-Y) */ | |
934 | if (num_sources_tosend > 0) { | |
935 | source_query_send_by_flag(group, num_sources_tosend); | |
936 | } | |
12e41d03 DL |
937 | } |
938 | ||
c5f76fad | 939 | void igmpv3_report_toex(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 940 | struct in_addr group_addr, int num_sources, |
941 | struct in_addr *sources) | |
12e41d03 | 942 | { |
d62a17ae | 943 | struct interface *ifp = igmp->interface; |
a16db099 | 944 | struct gm_group *group; |
d62a17ae | 945 | |
15569c58 | 946 | on_trace(__func__, ifp, from, group_addr, num_sources, sources); |
d62a17ae | 947 | |
948 | /* non-existant group is created as INCLUDE {empty} */ | |
949 | group = igmp_add_group_by_addr(igmp, group_addr); | |
950 | if (!group) { | |
951 | return; | |
952 | } | |
953 | ||
954 | if (group->group_filtermode_isexcl) { | |
955 | /* EXCLUDE mode */ | |
956 | toex_excl(group, num_sources, sources); | |
957 | } else { | |
958 | /* INCLUDE mode */ | |
959 | toex_incl(group, num_sources, sources); | |
df5dfb77 | 960 | assert(group->group_filtermode_isexcl); |
d62a17ae | 961 | } |
df5dfb77 | 962 | assert(group->group_filtermode_isexcl); |
d62a17ae | 963 | |
964 | /* Group Timer=GMI */ | |
965 | igmp_group_reset_gmi(group); | |
12e41d03 DL |
966 | } |
967 | ||
c5f76fad | 968 | void igmpv3_report_allow(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 969 | struct in_addr group_addr, int num_sources, |
970 | struct in_addr *sources) | |
12e41d03 | 971 | { |
15569c58 DA |
972 | on_trace(__func__, igmp->interface, from, group_addr, num_sources, |
973 | sources); | |
12e41d03 | 974 | |
d62a17ae | 975 | allow(igmp, from, group_addr, num_sources, sources); |
12e41d03 DL |
976 | } |
977 | ||
a16db099 | 978 | static void igmp_send_query_group(struct gm_group *group, char *query_buf, |
dda4d23c DL |
979 | size_t query_buf_size, int num_sources, |
980 | int s_flag) | |
981 | { | |
982 | struct interface *ifp = group->interface; | |
983 | struct pim_interface *pim_ifp = ifp->info; | |
c5f76fad | 984 | struct gm_sock *igmp; |
dda4d23c DL |
985 | struct listnode *sock_node; |
986 | ||
18adcff1 | 987 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->gm_socket_list, sock_node, igmp)) { |
29e58225 DL |
988 | igmp_send_query( |
989 | pim_ifp->igmp_version, group, igmp->fd, ifp->name, | |
990 | query_buf, query_buf_size, num_sources, | |
991 | group->group_addr, group->group_addr, | |
18adcff1 | 992 | pim_ifp->gm_specific_query_max_response_time_dsec, |
29e58225 DL |
993 | s_flag, igmp->querier_robustness_variable, |
994 | igmp->querier_query_interval); | |
dda4d23c DL |
995 | } |
996 | } | |
997 | ||
12e41d03 DL |
998 | /* |
999 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
1000 | ||
1001 | When transmitting a group specific query, if the group timer is | |
1002 | larger than LMQT, the "Suppress Router-Side Processing" bit is set | |
1003 | in the query message. | |
1004 | */ | |
a16db099 | 1005 | static void group_retransmit_group(struct gm_group *group) |
12e41d03 | 1006 | { |
d62a17ae | 1007 | struct pim_interface *pim_ifp; |
1008 | long lmqc; /* Last Member Query Count */ | |
1009 | long lmqi_msec; /* Last Member Query Interval */ | |
1010 | long lmqt_msec; /* Last Member Query Time */ | |
1011 | int s_flag; | |
1012 | int query_buf_size; | |
1013 | ||
dda4d23c | 1014 | pim_ifp = group->interface->info; |
d62a17ae | 1015 | |
29e58225 | 1016 | if (pim_ifp->igmp_version == 3) { |
d62a17ae | 1017 | query_buf_size = PIM_IGMP_BUFSIZE_WRITE; |
1018 | } else { | |
1019 | query_buf_size = IGMP_V12_MSG_SIZE; | |
1020 | } | |
1021 | ||
1022 | char query_buf[query_buf_size]; | |
1023 | ||
18adcff1 SG |
1024 | lmqc = pim_ifp->gm_last_member_query_count; |
1025 | lmqi_msec = 100 * pim_ifp->gm_specific_query_max_response_time_dsec; | |
d62a17ae | 1026 | lmqt_msec = lmqc * lmqi_msec; |
1027 | ||
1028 | /* | |
1029 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
1030 | ||
1031 | When transmitting a group specific query, if the group timer is | |
1032 | larger than LMQT, the "Suppress Router-Side Processing" bit is set | |
1033 | in the query message. | |
1034 | */ | |
1035 | s_flag = igmp_group_timer_remain_msec(group) > lmqt_msec; | |
1036 | ||
1037 | if (PIM_DEBUG_IGMP_TRACE) { | |
1038 | char group_str[INET_ADDRSTRLEN]; | |
1039 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1040 | sizeof(group_str)); | |
1041 | zlog_debug( | |
1042 | "retransmit_group_specific_query: group %s on %s: s_flag=%d count=%d", | |
dda4d23c | 1043 | group_str, group->interface->name, s_flag, |
d62a17ae | 1044 | group->group_specific_query_retransmit_count); |
1045 | } | |
1046 | ||
1047 | /* | |
1048 | RFC3376: 4.1.12. IP Destination Addresses for Queries | |
1049 | ||
1050 | Group-Specific and Group-and-Source-Specific Queries are sent with | |
1051 | an IP destination address equal to the multicast address of | |
1052 | interest. | |
1053 | */ | |
1054 | ||
dda4d23c | 1055 | igmp_send_query_group(group, query_buf, sizeof(query_buf), 0, s_flag); |
12e41d03 DL |
1056 | } |
1057 | ||
1058 | /* | |
1059 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific Queries | |
1060 | ||
1061 | When building a group and source specific query for a group G, two | |
1062 | separate query messages are sent for the group. The first one has | |
1063 | the "Suppress Router-Side Processing" bit set and contains all the | |
1064 | sources with retransmission state and timers greater than LMQT. The | |
1065 | second has the "Suppress Router-Side Processing" bit clear and | |
1066 | contains all the sources with retransmission state and timers lower | |
1067 | or equal to LMQT. If either of the two calculated messages does not | |
1068 | contain any sources, then its transmission is suppressed. | |
1069 | */ | |
a16db099 | 1070 | static int group_retransmit_sources(struct gm_group *group, |
12e41d03 DL |
1071 | int send_with_sflag_set) |
1072 | { | |
d62a17ae | 1073 | struct pim_interface *pim_ifp; |
1074 | long lmqc; /* Last Member Query Count */ | |
1075 | long lmqi_msec; /* Last Member Query Interval */ | |
1076 | long lmqt_msec; /* Last Member Query Time */ | |
1077 | char query_buf1[PIM_IGMP_BUFSIZE_WRITE]; /* 1 = with s_flag set */ | |
1078 | char query_buf2[PIM_IGMP_BUFSIZE_WRITE]; /* 2 = with s_flag clear */ | |
1079 | int query_buf1_max_sources; | |
1080 | int query_buf2_max_sources; | |
1081 | struct in_addr *source_addr1; | |
1082 | struct in_addr *source_addr2; | |
1083 | int num_sources_tosend1; | |
1084 | int num_sources_tosend2; | |
1085 | struct listnode *src_node; | |
51700107 | 1086 | struct gm_source *src; |
d62a17ae | 1087 | int num_retransmit_sources_left = 0; |
1088 | ||
1089 | source_addr1 = (struct in_addr *)(query_buf1 + IGMP_V3_SOURCES_OFFSET); | |
1090 | source_addr2 = (struct in_addr *)(query_buf2 + IGMP_V3_SOURCES_OFFSET); | |
1091 | ||
dda4d23c | 1092 | pim_ifp = group->interface->info; |
d62a17ae | 1093 | |
18adcff1 SG |
1094 | lmqc = pim_ifp->gm_last_member_query_count; |
1095 | lmqi_msec = 100 * pim_ifp->gm_specific_query_max_response_time_dsec; | |
d62a17ae | 1096 | lmqt_msec = lmqc * lmqi_msec; |
1097 | ||
1098 | /* Scan all group sources */ | |
1099 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { | |
1100 | ||
1101 | /* Source has retransmission state? */ | |
1102 | if (src->source_query_retransmit_count < 1) | |
1103 | continue; | |
1104 | ||
1105 | if (--src->source_query_retransmit_count > 0) { | |
1106 | ++num_retransmit_sources_left; | |
1107 | } | |
1108 | ||
1109 | /* Copy source address into appropriate query buffer */ | |
1110 | if (igmp_source_timer_remain_msec(src) > lmqt_msec) { | |
1111 | *source_addr1 = src->source_addr; | |
1112 | ++source_addr1; | |
1113 | } else { | |
1114 | *source_addr2 = src->source_addr; | |
1115 | ++source_addr2; | |
1116 | } | |
1117 | } | |
1118 | ||
1119 | num_sources_tosend1 = | |
1120 | source_addr1 | |
1121 | - (struct in_addr *)(query_buf1 + IGMP_V3_SOURCES_OFFSET); | |
1122 | num_sources_tosend2 = | |
1123 | source_addr2 | |
1124 | - (struct in_addr *)(query_buf2 + IGMP_V3_SOURCES_OFFSET); | |
1125 | ||
1126 | if (PIM_DEBUG_IGMP_TRACE) { | |
1127 | char group_str[INET_ADDRSTRLEN]; | |
1128 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1129 | sizeof(group_str)); | |
1130 | zlog_debug( | |
1131 | "retransmit_grp&src_specific_query: group %s on %s: srcs_with_sflag=%d srcs_wo_sflag=%d will_send_sflag=%d retransmit_src_left=%d", | |
dda4d23c | 1132 | group_str, group->interface->name, num_sources_tosend1, |
d62a17ae | 1133 | num_sources_tosend2, send_with_sflag_set, |
1134 | num_retransmit_sources_left); | |
1135 | } | |
1136 | ||
1137 | if (num_sources_tosend1 > 0) { | |
1138 | /* | |
1139 | Send group-and-source-specific query with s_flag set and all | |
1140 | sources with timers greater than LMQT. | |
1141 | */ | |
1142 | ||
1143 | if (send_with_sflag_set) { | |
1144 | ||
1145 | query_buf1_max_sources = | |
1146 | (sizeof(query_buf1) - IGMP_V3_SOURCES_OFFSET) | |
1147 | >> 2; | |
1148 | if (num_sources_tosend1 > query_buf1_max_sources) { | |
1149 | char group_str[INET_ADDRSTRLEN]; | |
1150 | pim_inet4_dump("<group?>", group->group_addr, | |
1151 | group_str, sizeof(group_str)); | |
1152 | zlog_warn( | |
1153 | "%s: group %s on %s: s_flag=1 unable to fit %d sources into buf_size=%zu (max_sources=%d)", | |
5e81f5dd | 1154 | __func__, group_str, |
dda4d23c | 1155 | group->interface->name, |
d62a17ae | 1156 | num_sources_tosend1, sizeof(query_buf1), |
1157 | query_buf1_max_sources); | |
1158 | } else { | |
1159 | /* | |
1160 | RFC3376: 4.1.12. IP Destination Addresses for | |
1161 | Queries | |
1162 | ||
1163 | Group-Specific and Group-and-Source-Specific | |
1164 | Queries are sent with | |
1165 | an IP destination address equal to the | |
1166 | multicast address of | |
1167 | interest. | |
1168 | */ | |
1169 | ||
a1a4295a DL |
1170 | igmp_send_query_group( |
1171 | group, query_buf1, sizeof(query_buf1), | |
1172 | num_sources_tosend1, 1 /* s_flag */); | |
d62a17ae | 1173 | } |
1174 | ||
1175 | } /* send_with_sflag_set */ | |
1176 | } | |
1177 | ||
1178 | if (num_sources_tosend2 > 0) { | |
1179 | /* | |
1180 | Send group-and-source-specific query with s_flag clear and all | |
1181 | sources with timers lower or equal to LMQT. | |
1182 | */ | |
1183 | ||
1184 | query_buf2_max_sources = | |
1185 | (sizeof(query_buf2) - IGMP_V3_SOURCES_OFFSET) >> 2; | |
1186 | if (num_sources_tosend2 > query_buf2_max_sources) { | |
1187 | char group_str[INET_ADDRSTRLEN]; | |
1188 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1189 | sizeof(group_str)); | |
1190 | zlog_warn( | |
1191 | "%s: group %s on %s: s_flag=0 unable to fit %d sources into buf_size=%zu (max_sources=%d)", | |
dda4d23c | 1192 | __func__, group_str, group->interface->name, |
5e81f5dd DS |
1193 | num_sources_tosend2, sizeof(query_buf2), |
1194 | query_buf2_max_sources); | |
d62a17ae | 1195 | } else { |
1196 | /* | |
1197 | RFC3376: 4.1.12. IP Destination Addresses for Queries | |
1198 | ||
1199 | Group-Specific and Group-and-Source-Specific Queries | |
1200 | are sent with | |
1201 | an IP destination address equal to the multicast | |
1202 | address of | |
1203 | interest. | |
1204 | */ | |
1205 | ||
a1a4295a DL |
1206 | igmp_send_query_group( |
1207 | group, query_buf2, sizeof(query_buf2), | |
1208 | num_sources_tosend2, 0 /* s_flag */); | |
d62a17ae | 1209 | } |
1210 | } | |
1211 | ||
1212 | return num_retransmit_sources_left; | |
12e41d03 DL |
1213 | } |
1214 | ||
1215 | static int igmp_group_retransmit(struct thread *t) | |
1216 | { | |
a16db099 | 1217 | struct gm_group *group; |
d62a17ae | 1218 | int num_retransmit_sources_left; |
1219 | int send_with_sflag_set; /* boolean */ | |
1220 | ||
1221 | group = THREAD_ARG(t); | |
1222 | ||
1223 | if (PIM_DEBUG_IGMP_TRACE) { | |
1224 | char group_str[INET_ADDRSTRLEN]; | |
1225 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1226 | sizeof(group_str)); | |
1227 | zlog_debug("group_retransmit_timer: group %s on %s", group_str, | |
dda4d23c | 1228 | group->interface->name); |
d62a17ae | 1229 | } |
1230 | ||
1231 | /* Retransmit group-specific queries? (RFC3376: 6.6.3.1) */ | |
1232 | if (group->group_specific_query_retransmit_count > 0) { | |
1233 | ||
1234 | /* Retransmit group-specific queries (RFC3376: 6.6.3.1) */ | |
1235 | group_retransmit_group(group); | |
1236 | --group->group_specific_query_retransmit_count; | |
1237 | ||
1238 | /* | |
1239 | RFC3376: 6.6.3.2 | |
1240 | If a group specific query is scheduled to be transmitted at | |
1241 | the | |
1242 | same time as a group and source specific query for the same | |
1243 | group, | |
1244 | then transmission of the group and source specific message | |
1245 | with the | |
1246 | "Suppress Router-Side Processing" bit set may be suppressed. | |
1247 | */ | |
1248 | send_with_sflag_set = 0; /* boolean=false */ | |
1249 | } else { | |
1250 | send_with_sflag_set = 1; /* boolean=true */ | |
1251 | } | |
1252 | ||
1253 | /* Retransmit group-and-source-specific queries (RFC3376: 6.6.3.2) */ | |
1254 | num_retransmit_sources_left = | |
1255 | group_retransmit_sources(group, send_with_sflag_set); | |
1256 | ||
1257 | /* | |
1258 | Keep group retransmit timer running if there is any retransmit | |
1259 | counter pending | |
1260 | */ | |
1261 | if ((num_retransmit_sources_left > 0) | |
1262 | || (group->group_specific_query_retransmit_count > 0)) { | |
1263 | group_retransmit_timer_on(group); | |
1264 | } | |
1265 | ||
1266 | return 0; | |
12e41d03 DL |
1267 | } |
1268 | ||
1269 | /* | |
1270 | group_retransmit_timer_on: | |
1271 | if group retransmit timer isn't running, starts it; | |
1272 | otherwise, do nothing | |
1273 | */ | |
a16db099 | 1274 | static void group_retransmit_timer_on(struct gm_group *group) |
12e41d03 | 1275 | { |
d62a17ae | 1276 | struct pim_interface *pim_ifp; |
1277 | long lmqi_msec; /* Last Member Query Interval */ | |
1278 | ||
1279 | /* if group retransmit timer is running, do nothing */ | |
1280 | if (group->t_group_query_retransmit_timer) { | |
1281 | return; | |
1282 | } | |
1283 | ||
dda4d23c | 1284 | pim_ifp = group->interface->info; |
d62a17ae | 1285 | |
18adcff1 | 1286 | lmqi_msec = 100 * pim_ifp->gm_specific_query_max_response_time_dsec; |
d62a17ae | 1287 | |
1288 | if (PIM_DEBUG_IGMP_TRACE) { | |
1289 | char group_str[INET_ADDRSTRLEN]; | |
1290 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1291 | sizeof(group_str)); | |
1292 | zlog_debug( | |
1293 | "Scheduling %ld.%03ld sec retransmit timer for group %s on %s", | |
1294 | lmqi_msec / 1000, lmqi_msec % 1000, group_str, | |
dda4d23c | 1295 | group->interface->name); |
d62a17ae | 1296 | } |
1297 | ||
36417fcc DS |
1298 | thread_add_timer_msec(router->master, igmp_group_retransmit, group, |
1299 | lmqi_msec, | |
d62a17ae | 1300 | &group->t_group_query_retransmit_timer); |
12e41d03 DL |
1301 | } |
1302 | ||
a16db099 | 1303 | static long igmp_group_timer_remain_msec(struct gm_group *group) |
12e41d03 | 1304 | { |
d62a17ae | 1305 | return pim_time_timer_remain_msec(group->t_group_timer); |
12e41d03 DL |
1306 | } |
1307 | ||
51700107 | 1308 | static long igmp_source_timer_remain_msec(struct gm_source *source) |
12e41d03 | 1309 | { |
d62a17ae | 1310 | return pim_time_timer_remain_msec(source->t_source_timer); |
12e41d03 DL |
1311 | } |
1312 | ||
1313 | /* | |
1314 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
1315 | */ | |
a16db099 | 1316 | static void group_query_send(struct gm_group *group) |
12e41d03 | 1317 | { |
59115451 | 1318 | struct pim_interface *pim_ifp; |
d62a17ae | 1319 | long lmqc; /* Last Member Query Count */ |
12e41d03 | 1320 | |
dda4d23c | 1321 | pim_ifp = group->interface->info; |
18adcff1 | 1322 | lmqc = pim_ifp->gm_last_member_query_count; |
12e41d03 | 1323 | |
d62a17ae | 1324 | /* lower group timer to lmqt */ |
1325 | igmp_group_timer_lower_to_lmqt(group); | |
12e41d03 | 1326 | |
d62a17ae | 1327 | /* reset retransmission counter */ |
1328 | group->group_specific_query_retransmit_count = lmqc; | |
12e41d03 | 1329 | |
d62a17ae | 1330 | /* immediately send group specific query (decrease retransmit counter by |
1331 | * 1)*/ | |
1332 | group_retransmit_group(group); | |
12e41d03 | 1333 | |
d62a17ae | 1334 | /* make sure group retransmit timer is running */ |
1335 | group_retransmit_timer_on(group); | |
12e41d03 DL |
1336 | } |
1337 | ||
1338 | /* | |
1339 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific Queries | |
1340 | */ | |
a16db099 | 1341 | static void source_query_send_by_flag(struct gm_group *group, |
12e41d03 DL |
1342 | int num_sources_tosend) |
1343 | { | |
d62a17ae | 1344 | struct pim_interface *pim_ifp; |
1345 | struct listnode *src_node; | |
51700107 | 1346 | struct gm_source *src; |
d62a17ae | 1347 | long lmqc; /* Last Member Query Count */ |
1348 | long lmqi_msec; /* Last Member Query Interval */ | |
1349 | long lmqt_msec; /* Last Member Query Time */ | |
1350 | ||
df5dfb77 | 1351 | assert(num_sources_tosend > 0); |
d62a17ae | 1352 | |
dda4d23c | 1353 | pim_ifp = group->interface->info; |
d62a17ae | 1354 | |
18adcff1 SG |
1355 | lmqc = pim_ifp->gm_last_member_query_count; |
1356 | lmqi_msec = 100 * pim_ifp->gm_specific_query_max_response_time_dsec; | |
d62a17ae | 1357 | lmqt_msec = lmqc * lmqi_msec; |
1358 | ||
1359 | /* | |
1360 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific | |
1361 | Queries | |
1362 | ||
1363 | (...) for each of the sources in X of group G, with source timer | |
1364 | larger | |
1365 | than LMQT: | |
1366 | o Set number of retransmissions for each source to [Last Member | |
1367 | Query Count]. | |
1368 | o Lower source timer to LMQT. | |
1369 | */ | |
1370 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { | |
1371 | if (IGMP_SOURCE_TEST_SEND(src->source_flags)) { | |
1372 | /* source "src" in X of group G */ | |
1373 | if (igmp_source_timer_remain_msec(src) > lmqt_msec) { | |
1374 | src->source_query_retransmit_count = lmqc; | |
1375 | igmp_source_timer_lower_to_lmqt(src); | |
1376 | } | |
1377 | } | |
1378 | } | |
1379 | ||
1380 | /* send group-and-source specific queries */ | |
1381 | group_retransmit_sources(group, 1 /* send_with_sflag_set=true */); | |
1382 | ||
1383 | /* make sure group retransmit timer is running */ | |
1384 | group_retransmit_timer_on(group); | |
12e41d03 DL |
1385 | } |
1386 | ||
a16db099 | 1387 | static void block_excl(struct gm_group *group, int num_sources, |
d62a17ae | 1388 | struct in_addr *sources) |
12e41d03 | 1389 | { |
d62a17ae | 1390 | int num_sources_tosend = 0; |
1391 | int i; | |
1392 | ||
1393 | /* 1. clear off SEND flag from all known sources (X,Y) */ | |
1394 | source_clear_send_flag(group->group_source_list); | |
1395 | ||
1396 | /* 2. scan received sources (A) */ | |
1397 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 1398 | struct gm_source *source; |
d62a17ae | 1399 | struct in_addr *src_addr; |
5421bf8f | 1400 | bool new; |
d62a17ae | 1401 | |
1402 | src_addr = sources + i; | |
1403 | ||
1404 | /* lookup reported source (A) in known sources (X,Y) */ | |
5421bf8f DL |
1405 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
1406 | if (!source) | |
1407 | continue; | |
1408 | ||
1409 | if (new) { | |
d62a17ae | 1410 | /* 3: if not found, create source with Group Timer: |
1411 | * (A-X-Y)=Group Timer */ | |
1412 | long group_timer_msec; | |
d62a17ae | 1413 | |
df5dfb77 | 1414 | assert(!source->t_source_timer); /* timer == 0 */ |
d62a17ae | 1415 | group_timer_msec = igmp_group_timer_remain_msec(group); |
1416 | igmp_source_timer_on(group, source, group_timer_msec); | |
df5dfb77 | 1417 | assert(source->t_source_timer); /* (A-X-Y) timer > 0 */ |
d62a17ae | 1418 | } |
1419 | ||
1420 | if (source->t_source_timer) { | |
1421 | /* 4. if source timer>0 mark SEND flag: Q(G,A-Y) */ | |
1422 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
1423 | ++num_sources_tosend; | |
1424 | } | |
1425 | } | |
1426 | ||
1427 | /* 5. send sources marked with SEND flag: Q(G,A-Y) */ | |
1428 | if (num_sources_tosend > 0) { | |
1429 | source_query_send_by_flag(group, num_sources_tosend); | |
1430 | } | |
12e41d03 DL |
1431 | } |
1432 | ||
a16db099 | 1433 | static void block_incl(struct gm_group *group, int num_sources, |
d62a17ae | 1434 | struct in_addr *sources) |
12e41d03 | 1435 | { |
d62a17ae | 1436 | int num_sources_tosend = 0; |
1437 | int i; | |
1438 | ||
1439 | /* 1. clear off SEND flag from all known sources (B) */ | |
1440 | source_clear_send_flag(group->group_source_list); | |
1441 | ||
1442 | /* 2. scan received sources (A) */ | |
1443 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 1444 | struct gm_source *source; |
d62a17ae | 1445 | struct in_addr *src_addr; |
1446 | ||
1447 | src_addr = sources + i; | |
1448 | ||
1449 | /* lookup reported source (A) in known sources (B) */ | |
1450 | source = igmp_find_source_by_addr(group, *src_addr); | |
1451 | if (source) { | |
1452 | /* 3. if found (A*B), mark SEND flag: Q(G,A*B) */ | |
1453 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
1454 | ++num_sources_tosend; | |
1455 | } | |
1456 | } | |
1457 | ||
1458 | /* 4. send sources marked with SEND flag: Q(G,A*B) */ | |
1459 | if (num_sources_tosend > 0) { | |
1460 | source_query_send_by_flag(group, num_sources_tosend); | |
1461 | } | |
12e41d03 DL |
1462 | } |
1463 | ||
c5f76fad | 1464 | void igmpv3_report_block(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 1465 | struct in_addr group_addr, int num_sources, |
1466 | struct in_addr *sources) | |
12e41d03 | 1467 | { |
d62a17ae | 1468 | struct interface *ifp = igmp->interface; |
a16db099 | 1469 | struct gm_group *group; |
d62a17ae | 1470 | |
15569c58 | 1471 | on_trace(__func__, ifp, from, group_addr, num_sources, sources); |
d62a17ae | 1472 | |
1473 | /* non-existant group is created as INCLUDE {empty} */ | |
1474 | group = igmp_add_group_by_addr(igmp, group_addr); | |
1475 | if (!group) { | |
1476 | return; | |
1477 | } | |
1478 | ||
1479 | if (group->group_filtermode_isexcl) { | |
1480 | /* EXCLUDE mode */ | |
1481 | block_excl(group, num_sources, sources); | |
1482 | } else { | |
1483 | /* INCLUDE mode */ | |
1484 | block_incl(group, num_sources, sources); | |
1485 | } | |
12e41d03 DL |
1486 | } |
1487 | ||
a16db099 | 1488 | void igmp_group_timer_lower_to_lmqt(struct gm_group *group) |
12e41d03 | 1489 | { |
d62a17ae | 1490 | struct interface *ifp; |
1491 | struct pim_interface *pim_ifp; | |
1492 | char *ifname; | |
1493 | int lmqi_dsec; /* Last Member Query Interval */ | |
1494 | int lmqc; /* Last Member Query Count */ | |
1495 | int lmqt_msec; /* Last Member Query Time */ | |
1496 | ||
1497 | /* | |
1498 | RFC 3376: 6.2.2. Definition of Group Timers | |
1499 | ||
1500 | The group timer is only used when a group is in EXCLUDE mode and | |
1501 | it represents the time for the *filter-mode* of the group to | |
1502 | expire and switch to INCLUDE mode. | |
1503 | */ | |
1504 | if (!group->group_filtermode_isexcl) { | |
1505 | return; | |
1506 | } | |
1507 | ||
dda4d23c | 1508 | ifp = group->interface; |
d62a17ae | 1509 | pim_ifp = ifp->info; |
1510 | ifname = ifp->name; | |
1511 | ||
18adcff1 SG |
1512 | lmqi_dsec = pim_ifp->gm_specific_query_max_response_time_dsec; |
1513 | lmqc = pim_ifp->gm_last_member_query_count; | |
d62a17ae | 1514 | lmqt_msec = PIM_IGMP_LMQT_MSEC( |
1515 | lmqi_dsec, lmqc); /* lmqt_msec = (100 * lmqi_dsec) * lmqc */ | |
1516 | ||
1517 | if (PIM_DEBUG_IGMP_TRACE) { | |
1518 | char group_str[INET_ADDRSTRLEN]; | |
1519 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1520 | sizeof(group_str)); | |
1521 | zlog_debug( | |
1522 | "%s: group %s on %s: LMQC=%d LMQI=%d dsec LMQT=%d msec", | |
15569c58 | 1523 | __func__, group_str, ifname, lmqc, lmqi_dsec, |
d62a17ae | 1524 | lmqt_msec); |
1525 | } | |
1526 | ||
df5dfb77 | 1527 | assert(group->group_filtermode_isexcl); |
d62a17ae | 1528 | |
1529 | igmp_group_timer_on(group, lmqt_msec, ifname); | |
12e41d03 DL |
1530 | } |
1531 | ||
51700107 | 1532 | void igmp_source_timer_lower_to_lmqt(struct gm_source *source) |
12e41d03 | 1533 | { |
a16db099 | 1534 | struct gm_group *group; |
d62a17ae | 1535 | struct interface *ifp; |
1536 | struct pim_interface *pim_ifp; | |
1537 | char *ifname; | |
1538 | int lmqi_dsec; /* Last Member Query Interval */ | |
1539 | int lmqc; /* Last Member Query Count */ | |
1540 | int lmqt_msec; /* Last Member Query Time */ | |
1541 | ||
1542 | group = source->source_group; | |
dda4d23c | 1543 | ifp = group->interface; |
d62a17ae | 1544 | pim_ifp = ifp->info; |
1545 | ifname = ifp->name; | |
1546 | ||
18adcff1 SG |
1547 | lmqi_dsec = pim_ifp->gm_specific_query_max_response_time_dsec; |
1548 | lmqc = pim_ifp->gm_last_member_query_count; | |
d62a17ae | 1549 | lmqt_msec = PIM_IGMP_LMQT_MSEC( |
1550 | lmqi_dsec, lmqc); /* lmqt_msec = (100 * lmqi_dsec) * lmqc */ | |
1551 | ||
1552 | if (PIM_DEBUG_IGMP_TRACE) { | |
1553 | char group_str[INET_ADDRSTRLEN]; | |
1554 | char source_str[INET_ADDRSTRLEN]; | |
1555 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1556 | sizeof(group_str)); | |
1557 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
1558 | sizeof(source_str)); | |
1559 | zlog_debug( | |
1560 | "%s: group %s source %s on %s: LMQC=%d LMQI=%d dsec LMQT=%d msec", | |
15569c58 DA |
1561 | __func__, group_str, source_str, ifname, lmqc, |
1562 | lmqi_dsec, lmqt_msec); | |
d62a17ae | 1563 | } |
1564 | ||
1565 | igmp_source_timer_on(group, source, lmqt_msec); | |
12e41d03 DL |
1566 | } |
1567 | ||
a16db099 | 1568 | void igmp_v3_send_query(struct gm_group *group, int fd, const char *ifname, |
d62a17ae | 1569 | char *query_buf, int query_buf_size, int num_sources, |
1570 | struct in_addr dst_addr, struct in_addr group_addr, | |
1571 | int query_max_response_time_dsec, uint8_t s_flag, | |
1572 | uint8_t querier_robustness_variable, | |
1573 | uint16_t querier_query_interval) | |
12e41d03 | 1574 | { |
d62a17ae | 1575 | ssize_t msg_size; |
1576 | uint8_t max_resp_code; | |
1577 | uint8_t qqic; | |
1578 | ssize_t sent; | |
1579 | struct sockaddr_in to; | |
1580 | socklen_t tolen; | |
1581 | uint16_t checksum; | |
1582 | ||
df5dfb77 | 1583 | assert(num_sources >= 0); |
d62a17ae | 1584 | |
1585 | msg_size = IGMP_V3_SOURCES_OFFSET + (num_sources << 2); | |
1586 | if (msg_size > query_buf_size) { | |
af4c2728 | 1587 | flog_err( |
450971aa | 1588 | EC_LIB_DEVELOPMENT, |
d62a17ae | 1589 | "%s %s: unable to send: msg_size=%zd larger than query_buf_size=%d", |
15569c58 | 1590 | __FILE__, __func__, msg_size, query_buf_size); |
d62a17ae | 1591 | return; |
1592 | } | |
1593 | ||
1594 | s_flag = PIM_FORCE_BOOLEAN(s_flag); | |
df5dfb77 | 1595 | assert((s_flag == 0) || (s_flag == 1)); |
d62a17ae | 1596 | |
1597 | max_resp_code = igmp_msg_encode16to8(query_max_response_time_dsec); | |
1598 | qqic = igmp_msg_encode16to8(querier_query_interval); | |
1599 | ||
1600 | /* | |
1601 | RFC 3376: 4.1.6. QRV (Querier's Robustness Variable) | |
1602 | ||
1603 | If non-zero, the QRV field contains the [Robustness Variable] | |
1604 | value used by the querier, i.e., the sender of the Query. If the | |
1605 | querier's [Robustness Variable] exceeds 7, the maximum value of | |
1606 | the QRV field, the QRV is set to zero. | |
1607 | */ | |
1608 | if (querier_robustness_variable > 7) { | |
1609 | querier_robustness_variable = 0; | |
1610 | } | |
1611 | ||
1612 | query_buf[0] = PIM_IGMP_MEMBERSHIP_QUERY; | |
1613 | query_buf[1] = max_resp_code; | |
1614 | *(uint16_t *)(query_buf + IGMP_CHECKSUM_OFFSET) = | |
1615 | 0; /* for computing checksum */ | |
1616 | memcpy(query_buf + 4, &group_addr, sizeof(struct in_addr)); | |
1617 | ||
1618 | query_buf[8] = (s_flag << 3) | querier_robustness_variable; | |
1619 | query_buf[9] = qqic; | |
1620 | *(uint16_t *)(query_buf + IGMP_V3_NUMSOURCES_OFFSET) = | |
1621 | htons(num_sources); | |
1622 | ||
1623 | checksum = in_cksum(query_buf, msg_size); | |
1624 | *(uint16_t *)(query_buf + IGMP_CHECKSUM_OFFSET) = checksum; | |
1625 | ||
1626 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1627 | char dst_str[INET_ADDRSTRLEN]; | |
1628 | char group_str[INET_ADDRSTRLEN]; | |
1629 | pim_inet4_dump("<dst?>", dst_addr, dst_str, sizeof(dst_str)); | |
1630 | pim_inet4_dump("<group?>", group_addr, group_str, | |
1631 | sizeof(group_str)); | |
1632 | zlog_debug( | |
1633 | "Send IGMPv3 query to %s on %s for group %s, sources=%d msg_size=%zd s_flag=%x QRV=%u QQI=%u QQIC=%02x", | |
1634 | dst_str, ifname, group_str, num_sources, msg_size, | |
1635 | s_flag, querier_robustness_variable, | |
1636 | querier_query_interval, qqic); | |
1637 | } | |
1638 | ||
1639 | memset(&to, 0, sizeof(to)); | |
1640 | to.sin_family = AF_INET; | |
1641 | to.sin_addr = dst_addr; | |
1642 | tolen = sizeof(to); | |
1643 | ||
1644 | sent = sendto(fd, query_buf, msg_size, MSG_DONTWAIT, | |
1645 | (struct sockaddr *)&to, tolen); | |
1646 | if (sent != (ssize_t)msg_size) { | |
1647 | char dst_str[INET_ADDRSTRLEN]; | |
1648 | char group_str[INET_ADDRSTRLEN]; | |
1649 | pim_inet4_dump("<dst?>", dst_addr, dst_str, sizeof(dst_str)); | |
1650 | pim_inet4_dump("<group?>", group_addr, group_str, | |
1651 | sizeof(group_str)); | |
1652 | if (sent < 0) { | |
1653 | zlog_warn( | |
1654 | "Send IGMPv3 query failed due to %s on %s: group=%s msg_size=%zd: errno=%d: %s", | |
1655 | dst_str, ifname, group_str, msg_size, errno, | |
1656 | safe_strerror(errno)); | |
1657 | } else { | |
1658 | zlog_warn( | |
1659 | "Send IGMPv3 query failed due to %s on %s: group=%s msg_size=%zd: sent=%zd", | |
1660 | dst_str, ifname, group_str, msg_size, sent); | |
1661 | } | |
1662 | return; | |
1663 | } | |
1664 | ||
1665 | /* | |
1666 | s_flag sanity test: s_flag must be set for general queries | |
1667 | ||
1668 | RFC 3376: 6.6.1. Timer Updates | |
1669 | ||
1670 | When a router sends or receives a query with a clear Suppress | |
1671 | Router-Side Processing flag, it must update its timers to reflect | |
1672 | the correct timeout values for the group or sources being queried. | |
1673 | ||
1674 | General queries don't trigger timer update. | |
1675 | */ | |
1676 | if (!s_flag) { | |
1677 | /* general query? */ | |
3ca68c9c | 1678 | if (group_addr.s_addr == INADDR_ANY) { |
d62a17ae | 1679 | char dst_str[INET_ADDRSTRLEN]; |
1680 | char group_str[INET_ADDRSTRLEN]; | |
1681 | pim_inet4_dump("<dst?>", dst_addr, dst_str, | |
1682 | sizeof(dst_str)); | |
1683 | pim_inet4_dump("<group?>", group_addr, group_str, | |
1684 | sizeof(group_str)); | |
1685 | zlog_warn( | |
1686 | "%s: to %s on %s: group=%s sources=%d: s_flag is clear for general query!", | |
15569c58 | 1687 | __func__, dst_str, ifname, group_str, |
d62a17ae | 1688 | num_sources); |
1689 | } | |
1690 | } | |
b05b72e8 DW |
1691 | } |
1692 | ||
c5f76fad | 1693 | void igmp_v3_recv_query(struct gm_sock *igmp, const char *from_str, |
d62a17ae | 1694 | char *igmp_msg) |
b05b72e8 | 1695 | { |
d62a17ae | 1696 | struct interface *ifp; |
1697 | struct pim_interface *pim_ifp; | |
1698 | struct in_addr group_addr; | |
1699 | uint8_t resv_s_qrv = 0; | |
1700 | uint8_t s_flag = 0; | |
1701 | uint8_t qrv = 0; | |
1702 | int i; | |
1703 | ||
1704 | memcpy(&group_addr, igmp_msg + 4, sizeof(struct in_addr)); | |
1705 | ifp = igmp->interface; | |
1706 | pim_ifp = ifp->info; | |
1707 | ||
1708 | /* | |
1709 | * RFC 3376: 4.1.6. QRV (Querier's Robustness Variable) | |
1710 | * | |
1711 | * Routers adopt the QRV value from the most recently received Query | |
1712 | * as their own [Robustness Variable] value, unless that most | |
1713 | * recently received QRV was zero, in which case the receivers use | |
1714 | * the default [Robustness Variable] value specified in section 8.1 | |
1715 | * or a statically configured value. | |
1716 | */ | |
1717 | resv_s_qrv = igmp_msg[8]; | |
1718 | qrv = 7 & resv_s_qrv; | |
1719 | igmp->querier_robustness_variable = | |
18adcff1 | 1720 | qrv ? qrv : pim_ifp->gm_default_robustness_variable; |
d62a17ae | 1721 | |
1722 | /* | |
1723 | * RFC 3376: 4.1.7. QQIC (Querier's Query Interval Code) | |
1724 | * | |
1725 | * Multicast routers that are not the current querier adopt the QQI | |
1726 | * value from the most recently received Query as their own [Query | |
1727 | * Interval] value, unless that most recently received QQI was zero, | |
1728 | * in which case the receiving routers use the default. | |
1729 | */ | |
1730 | if (igmp->t_other_querier_timer) { | |
1731 | /* other querier present */ | |
1732 | uint8_t qqic; | |
1733 | uint16_t qqi; | |
1734 | qqic = igmp_msg[9]; | |
1735 | qqi = igmp_msg_decode8to16(qqic); | |
1736 | igmp->querier_query_interval = | |
18adcff1 | 1737 | qqi ? qqi : pim_ifp->gm_default_query_interval; |
d62a17ae | 1738 | |
1739 | if (PIM_DEBUG_IGMP_TRACE) { | |
1740 | char ifaddr_str[INET_ADDRSTRLEN]; | |
1741 | pim_inet4_dump("<ifaddr?>", igmp->ifaddr, ifaddr_str, | |
1742 | sizeof(ifaddr_str)); | |
1743 | zlog_debug( | |
1744 | "Querier %s new query interval is %s QQI=%u sec (recv QQIC=%02x from %s)", | |
1745 | ifaddr_str, | |
1746 | qqi ? "recv-non-default" : "default", | |
1747 | igmp->querier_query_interval, qqic, from_str); | |
1748 | } | |
1749 | } | |
1750 | ||
1751 | /* | |
1752 | * RFC 3376: 6.6.1. Timer Updates | |
1753 | * | |
1754 | * When a router sends or receives a query with a clear Suppress | |
1755 | * Router-Side Processing flag, it must update its timers to reflect | |
1756 | * the correct timeout values for the group or sources being queried. | |
1757 | * | |
1758 | * General queries don't trigger timer update. | |
1759 | */ | |
1760 | s_flag = (1 << 3) & resv_s_qrv; | |
1761 | ||
1762 | if (!s_flag) { | |
1763 | /* s_flag is clear */ | |
1764 | ||
3ca68c9c | 1765 | if (group_addr.s_addr == INADDR_ANY) { |
d62a17ae | 1766 | /* this is a general query */ |
1767 | /* log that general query should have the s_flag set */ | |
1768 | zlog_warn( | |
1769 | "General IGMP query v3 from %s on %s: Suppress Router-Side Processing flag is clear", | |
1770 | from_str, ifp->name); | |
1771 | } else { | |
a16db099 | 1772 | struct gm_group *group; |
d62a17ae | 1773 | |
1774 | /* this is a non-general query: perform timer updates */ | |
1775 | ||
1776 | group = find_group_by_addr(igmp, group_addr); | |
1777 | if (group) { | |
1778 | int recv_num_sources = ntohs(*( | |
1779 | uint16_t | |
1780 | *)(igmp_msg | |
1781 | + IGMP_V3_NUMSOURCES_OFFSET)); | |
1782 | ||
1783 | /* | |
1784 | * RFC 3376: 6.6.1. Timer Updates | |
1785 | * Query Q(G,A): Source Timer for sources in A | |
1786 | * are lowered to LMQT | |
1787 | * Query Q(G): Group Timer is lowered to LMQT | |
1788 | */ | |
1789 | if (recv_num_sources < 1) { | |
1790 | /* Query Q(G): Group Timer is lowered to | |
1791 | * LMQT */ | |
1792 | ||
1793 | igmp_group_timer_lower_to_lmqt(group); | |
1794 | } else { | |
1795 | /* Query Q(G,A): Source Timer for | |
1796 | * sources in A are lowered to LMQT */ | |
1797 | ||
1798 | /* Scan sources in query and lower their | |
1799 | * timers to LMQT */ | |
1800 | struct in_addr *sources = | |
1801 | (struct in_addr | |
1802 | *)(igmp_msg | |
1803 | + IGMP_V3_SOURCES_OFFSET); | |
1804 | for (i = 0; i < recv_num_sources; ++i) { | |
1805 | struct in_addr src_addr; | |
51700107 | 1806 | struct gm_source *src; |
d62a17ae | 1807 | memcpy(&src_addr, sources + i, |
1808 | sizeof(struct in_addr)); | |
1809 | src = igmp_find_source_by_addr( | |
1810 | group, src_addr); | |
1811 | if (src) { | |
1812 | igmp_source_timer_lower_to_lmqt( | |
1813 | src); | |
1814 | } | |
1815 | } | |
1816 | } | |
1817 | } else { | |
1818 | char group_str[INET_ADDRSTRLEN]; | |
1819 | pim_inet4_dump("<group?>", group_addr, | |
1820 | group_str, sizeof(group_str)); | |
1821 | zlog_warn( | |
1822 | "IGMP query v3 from %s on %s: could not find group %s for timer update", | |
1823 | from_str, ifp->name, group_str); | |
1824 | } | |
1825 | } | |
1826 | } /* s_flag is clear: timer updates */ | |
b05b72e8 DW |
1827 | } |
1828 | ||
c5f76fad | 1829 | int igmp_v3_recv_report(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 1830 | const char *from_str, char *igmp_msg, int igmp_msg_len) |
b05b72e8 | 1831 | { |
d62a17ae | 1832 | int num_groups; |
1833 | uint8_t *group_record; | |
1834 | uint8_t *report_pastend = (uint8_t *)igmp_msg + igmp_msg_len; | |
1835 | struct interface *ifp = igmp->interface; | |
1836 | int i; | |
1837 | int local_ncb = 0; | |
b0f525a8 QY |
1838 | struct pim_interface *pim_ifp; |
1839 | ||
f83f3966 MS |
1840 | if (igmp->mtrace_only) |
1841 | return 0; | |
1842 | ||
b0f525a8 | 1843 | pim_ifp = igmp->interface->info; |
d62a17ae | 1844 | |
1845 | if (igmp_msg_len < IGMP_V3_MSG_MIN_SIZE) { | |
1846 | zlog_warn( | |
1847 | "Recv IGMP report v3 from %s on %s: size=%d shorter than minimum=%d", | |
1848 | from_str, ifp->name, igmp_msg_len, | |
1849 | IGMP_V3_MSG_MIN_SIZE); | |
1850 | return -1; | |
1851 | } | |
1852 | ||
9041c30a | 1853 | if (igmp_validate_checksum(igmp_msg, igmp_msg_len) == -1) { |
d62a17ae | 1854 | zlog_warn( |
9041c30a MR |
1855 | "Recv IGMPv3 report from %s on %s with invalid checksum", |
1856 | from_str, ifp->name); | |
d62a17ae | 1857 | return -1; |
1858 | } | |
1859 | ||
21313cbf MS |
1860 | /* Collecting IGMP Rx stats */ |
1861 | igmp->rx_stats.report_v3++; | |
1862 | ||
d62a17ae | 1863 | num_groups = ntohs( |
1864 | *(uint16_t *)(igmp_msg + IGMP_V3_REPORT_NUMGROUPS_OFFSET)); | |
1865 | if (num_groups < 1) { | |
1866 | zlog_warn( | |
1867 | "Recv IGMP report v3 from %s on %s: missing group records", | |
1868 | from_str, ifp->name); | |
1869 | return -1; | |
1870 | } | |
1871 | ||
1872 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1873 | zlog_debug( | |
9041c30a MR |
1874 | "Recv IGMP report v3 from %s on %s: size=%d groups=%d", |
1875 | from_str, ifp->name, igmp_msg_len, num_groups); | |
d62a17ae | 1876 | } |
1877 | ||
1878 | group_record = (uint8_t *)igmp_msg + IGMP_V3_REPORT_GROUPPRECORD_OFFSET; | |
1879 | ||
1880 | /* Scan groups */ | |
1881 | for (i = 0; i < num_groups; ++i) { | |
1882 | struct in_addr rec_group; | |
1883 | uint8_t *sources; | |
1884 | uint8_t *src; | |
1885 | int rec_type; | |
1886 | int rec_auxdatalen; | |
1887 | int rec_num_sources; | |
1888 | int j; | |
1889 | struct prefix lncb; | |
1890 | struct prefix g; | |
b0f525a8 | 1891 | bool filtered = false; |
d62a17ae | 1892 | |
1893 | if ((group_record + IGMP_V3_GROUP_RECORD_MIN_SIZE) | |
1894 | > report_pastend) { | |
1895 | zlog_warn( | |
1896 | "Recv IGMP report v3 from %s on %s: group record beyond report end", | |
1897 | from_str, ifp->name); | |
1898 | return -1; | |
1899 | } | |
1900 | ||
1901 | rec_type = group_record[IGMP_V3_GROUP_RECORD_TYPE_OFFSET]; | |
1902 | rec_auxdatalen = | |
1903 | group_record[IGMP_V3_GROUP_RECORD_AUXDATALEN_OFFSET]; | |
1904 | rec_num_sources = ntohs(*( | |
1905 | uint16_t *)(group_record | |
1906 | + IGMP_V3_GROUP_RECORD_NUMSOURCES_OFFSET)); | |
1907 | ||
1908 | memcpy(&rec_group, | |
1909 | group_record + IGMP_V3_GROUP_RECORD_GROUP_OFFSET, | |
1910 | sizeof(struct in_addr)); | |
1911 | ||
1912 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1913 | zlog_debug( | |
ee2bbf7c | 1914 | " Recv IGMP report v3 from %s on %s: record=%d type=%d auxdatalen=%d sources=%d group=%pI4", |
d62a17ae | 1915 | from_str, ifp->name, i, rec_type, |
1916 | rec_auxdatalen, rec_num_sources, | |
ee2bbf7c | 1917 | &rec_group); |
d62a17ae | 1918 | } |
1919 | ||
1920 | /* Scan sources */ | |
1921 | ||
1922 | sources = group_record + IGMP_V3_GROUP_RECORD_SOURCE_OFFSET; | |
1923 | ||
1924 | for (j = 0, src = sources; j < rec_num_sources; ++j, src += 4) { | |
1925 | ||
1926 | if ((src + 4) > report_pastend) { | |
1927 | zlog_warn( | |
1928 | "Recv IGMP report v3 from %s on %s: group source beyond report end", | |
1929 | from_str, ifp->name); | |
1930 | return -1; | |
1931 | } | |
1932 | ||
1933 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1934 | char src_str[200]; | |
1935 | ||
1936 | if (!inet_ntop(AF_INET, src, src_str, | |
1937 | sizeof(src_str))) | |
772270f3 QY |
1938 | snprintf(src_str, sizeof(src_str), |
1939 | "<source?>"); | |
d62a17ae | 1940 | |
1941 | zlog_debug( | |
ee2bbf7c | 1942 | " Recv IGMP report v3 from %s on %s: record=%d group=%pI4 source=%s", |
d62a17ae | 1943 | from_str, ifp->name, i, |
ee2bbf7c | 1944 | &rec_group, src_str); |
d62a17ae | 1945 | } |
1946 | } /* for (sources) */ | |
1947 | ||
1948 | ||
1949 | lncb.family = AF_INET; | |
1950 | lncb.u.prefix4.s_addr = 0x000000E0; | |
1951 | lncb.prefixlen = 24; | |
1952 | ||
1953 | g.family = AF_INET; | |
1954 | g.u.prefix4 = rec_group; | |
12256b84 | 1955 | g.prefixlen = IPV4_MAX_BITLEN; |
b0f525a8 QY |
1956 | |
1957 | /* determine filtering status for group */ | |
1958 | filtered = pim_is_group_filtered(ifp->info, &rec_group); | |
1959 | ||
1960 | if (PIM_DEBUG_IGMP_PACKETS && filtered) | |
1961 | zlog_debug( | |
ee2bbf7c MS |
1962 | "Filtering IGMPv3 group record %pI4 from %s on %s per prefix-list %s", |
1963 | &rec_group, from_str, ifp->name, | |
b0f525a8 QY |
1964 | pim_ifp->boundary_oil_plist); |
1965 | ||
d62a17ae | 1966 | /* |
1967 | * If we receive a igmp report with the group in 224.0.0.0/24 | |
1968 | * then we should ignore it | |
1969 | */ | |
1970 | if (prefix_match(&lncb, &g)) | |
1971 | local_ncb = 1; | |
1972 | ||
b0f525a8 | 1973 | if (!local_ncb && !filtered) |
d62a17ae | 1974 | switch (rec_type) { |
1975 | case IGMP_GRP_REC_TYPE_MODE_IS_INCLUDE: | |
1976 | igmpv3_report_isin(igmp, from, rec_group, | |
1977 | rec_num_sources, | |
1978 | (struct in_addr *)sources); | |
1979 | break; | |
1980 | case IGMP_GRP_REC_TYPE_MODE_IS_EXCLUDE: | |
1981 | igmpv3_report_isex( | |
1982 | igmp, from, rec_group, rec_num_sources, | |
1983 | (struct in_addr *)sources, 0); | |
1984 | break; | |
1985 | case IGMP_GRP_REC_TYPE_CHANGE_TO_INCLUDE_MODE: | |
1986 | igmpv3_report_toin(igmp, from, rec_group, | |
1987 | rec_num_sources, | |
1988 | (struct in_addr *)sources); | |
1989 | break; | |
1990 | case IGMP_GRP_REC_TYPE_CHANGE_TO_EXCLUDE_MODE: | |
1991 | igmpv3_report_toex(igmp, from, rec_group, | |
1992 | rec_num_sources, | |
1993 | (struct in_addr *)sources); | |
1994 | break; | |
1995 | case IGMP_GRP_REC_TYPE_ALLOW_NEW_SOURCES: | |
1996 | igmpv3_report_allow(igmp, from, rec_group, | |
1997 | rec_num_sources, | |
1998 | (struct in_addr *)sources); | |
1999 | break; | |
2000 | case IGMP_GRP_REC_TYPE_BLOCK_OLD_SOURCES: | |
2001 | igmpv3_report_block(igmp, from, rec_group, | |
2002 | rec_num_sources, | |
2003 | (struct in_addr *)sources); | |
2004 | break; | |
2005 | default: | |
2006 | zlog_warn( | |
2007 | "Recv IGMP report v3 from %s on %s: unknown record type: type=%d", | |
2008 | from_str, ifp->name, rec_type); | |
2009 | } | |
2010 | ||
2011 | group_record += | |
2012 | 8 + (rec_num_sources << 2) + (rec_auxdatalen << 2); | |
2013 | local_ncb = 0; | |
2014 | ||
2015 | } /* for (group records) */ | |
2016 | ||
2017 | return 0; | |
12e41d03 | 2018 | } |