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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 | ||
cc9f21da | 121 | static void igmp_source_timer(struct thread *t) |
12e41d03 | 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 | } | |
12e41d03 DL |
182 | } |
183 | ||
a16db099 | 184 | static void source_timer_off(struct gm_group *group, struct gm_source *source) |
12e41d03 | 185 | { |
d62a17ae | 186 | if (!source->t_source_timer) |
187 | return; | |
188 | ||
189 | if (PIM_DEBUG_IGMP_TRACE) { | |
190 | char group_str[INET_ADDRSTRLEN]; | |
191 | char source_str[INET_ADDRSTRLEN]; | |
192 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
193 | sizeof(group_str)); | |
194 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
195 | sizeof(source_str)); | |
196 | zlog_debug( | |
197 | "Cancelling TIMER event for group %s source %s on %s", | |
a1a4295a | 198 | group_str, source_str, group->interface->name); |
d62a17ae | 199 | } |
200 | ||
201 | THREAD_OFF(source->t_source_timer); | |
12e41d03 DL |
202 | } |
203 | ||
a16db099 | 204 | static void igmp_source_timer_on(struct gm_group *group, |
51700107 | 205 | struct gm_source *source, long interval_msec) |
12e41d03 | 206 | { |
d62a17ae | 207 | source_timer_off(group, source); |
dda4d23c | 208 | struct pim_interface *pim_ifp = group->interface->info; |
d62a17ae | 209 | |
210 | if (PIM_DEBUG_IGMP_EVENTS) { | |
211 | char group_str[INET_ADDRSTRLEN]; | |
212 | char source_str[INET_ADDRSTRLEN]; | |
213 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
214 | sizeof(group_str)); | |
215 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
216 | sizeof(source_str)); | |
217 | zlog_debug( | |
218 | "Scheduling %ld.%03ld sec TIMER event for group %s source %s on %s", | |
219 | interval_msec / 1000, interval_msec % 1000, group_str, | |
dda4d23c | 220 | source_str, group->interface->name); |
d62a17ae | 221 | } |
222 | ||
36417fcc DS |
223 | thread_add_timer_msec(router->master, igmp_source_timer, source, |
224 | interval_msec, &source->t_source_timer); | |
d62a17ae | 225 | |
226 | /* | |
227 | RFC 3376: 6.3. IGMPv3 Source-Specific Forwarding Rules | |
228 | ||
229 | Source timer switched from (T == 0) to (T > 0): enable forwarding. | |
230 | */ | |
e52e3223 | 231 | igmp_source_forward_start(pim_ifp->pim, source); |
12e41d03 DL |
232 | } |
233 | ||
a16db099 | 234 | void igmp_source_reset_gmi(struct gm_group *group, struct gm_source *source) |
12e41d03 | 235 | { |
d62a17ae | 236 | long group_membership_interval_msec; |
d62a17ae | 237 | struct interface *ifp; |
238 | ||
dda4d23c | 239 | ifp = group->interface; |
d62a17ae | 240 | |
dda4d23c | 241 | group_membership_interval_msec = igmp_gmi_msec(group); |
d62a17ae | 242 | |
243 | if (PIM_DEBUG_IGMP_TRACE) { | |
244 | char group_str[INET_ADDRSTRLEN]; | |
245 | char source_str[INET_ADDRSTRLEN]; | |
246 | ||
247 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
248 | sizeof(group_str)); | |
249 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
250 | sizeof(source_str)); | |
251 | ||
252 | zlog_debug( | |
253 | "Resetting source %s timer to GMI=%ld.%03ld sec for group %s on %s", | |
254 | source_str, group_membership_interval_msec / 1000, | |
255 | group_membership_interval_msec % 1000, group_str, | |
256 | ifp->name); | |
257 | } | |
258 | ||
259 | igmp_source_timer_on(group, source, group_membership_interval_msec); | |
12e41d03 DL |
260 | } |
261 | ||
a16db099 | 262 | static void source_mark_delete_flag(struct gm_group *group) |
12e41d03 | 263 | { |
d62a17ae | 264 | struct listnode *src_node; |
51700107 | 265 | struct gm_source *src; |
12e41d03 | 266 | |
d62a17ae | 267 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { |
268 | IGMP_SOURCE_DO_DELETE(src->source_flags); | |
269 | } | |
12e41d03 DL |
270 | } |
271 | ||
a16db099 | 272 | static void source_mark_send_flag(struct gm_group *group) |
12e41d03 | 273 | { |
d62a17ae | 274 | struct listnode *src_node; |
51700107 | 275 | struct gm_source *src; |
12e41d03 | 276 | |
d62a17ae | 277 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { |
278 | IGMP_SOURCE_DO_SEND(src->source_flags); | |
279 | } | |
12e41d03 DL |
280 | } |
281 | ||
a16db099 | 282 | static int source_mark_send_flag_by_timer(struct gm_group *group) |
12e41d03 | 283 | { |
d62a17ae | 284 | struct listnode *src_node; |
51700107 | 285 | struct gm_source *src; |
d62a17ae | 286 | int num_marked_sources = 0; |
287 | ||
288 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { | |
289 | /* Is source timer running? */ | |
290 | if (src->t_source_timer) { | |
291 | IGMP_SOURCE_DO_SEND(src->source_flags); | |
292 | ++num_marked_sources; | |
293 | } else { | |
294 | IGMP_SOURCE_DONT_SEND(src->source_flags); | |
295 | } | |
296 | } | |
297 | ||
298 | return num_marked_sources; | |
12e41d03 DL |
299 | } |
300 | ||
301 | static void source_clear_send_flag(struct list *source_list) | |
302 | { | |
d62a17ae | 303 | struct listnode *src_node; |
51700107 | 304 | struct gm_source *src; |
12e41d03 | 305 | |
d62a17ae | 306 | for (ALL_LIST_ELEMENTS_RO(source_list, src_node, src)) { |
307 | IGMP_SOURCE_DONT_SEND(src->source_flags); | |
308 | } | |
12e41d03 DL |
309 | } |
310 | ||
311 | /* | |
312 | Any source (*,G) is forwarded only if mode is EXCLUDE {empty} | |
313 | */ | |
a16db099 | 314 | static void group_exclude_fwd_anysrc_ifempty(struct gm_group *group) |
12e41d03 | 315 | { |
dda4d23c | 316 | struct pim_interface *pim_ifp = group->interface->info; |
e52e3223 | 317 | |
df5dfb77 | 318 | assert(group->group_filtermode_isexcl); |
12e41d03 | 319 | |
d62a17ae | 320 | if (listcount(group->group_source_list) < 1) { |
e52e3223 | 321 | igmp_anysource_forward_start(pim_ifp->pim, group); |
d62a17ae | 322 | } |
12e41d03 DL |
323 | } |
324 | ||
51700107 | 325 | void igmp_source_free(struct gm_source *source) |
12e41d03 | 326 | { |
d62a17ae | 327 | /* make sure there is no source timer running */ |
df5dfb77 | 328 | assert(!source->t_source_timer); |
12e41d03 | 329 | |
d62a17ae | 330 | XFREE(MTYPE_PIM_IGMP_GROUP_SOURCE, source); |
12e41d03 DL |
331 | } |
332 | ||
51700107 | 333 | static void source_channel_oil_detach(struct gm_source *source) |
12e41d03 | 334 | { |
d62a17ae | 335 | if (source->source_channel_oil) { |
15569c58 | 336 | pim_channel_oil_del(source->source_channel_oil, __func__); |
d62a17ae | 337 | source->source_channel_oil = NULL; |
338 | } | |
12e41d03 DL |
339 | } |
340 | ||
341 | /* | |
342 | igmp_source_delete: stop fowarding, and delete the source | |
343 | igmp_source_forward_stop: stop fowarding, but keep the source | |
344 | */ | |
51700107 | 345 | void igmp_source_delete(struct gm_source *source) |
12e41d03 | 346 | { |
a16db099 | 347 | struct gm_group *group; |
d62a17ae | 348 | struct in_addr src; |
349 | ||
350 | group = source->source_group; | |
351 | ||
352 | if (PIM_DEBUG_IGMP_TRACE) { | |
353 | char group_str[INET_ADDRSTRLEN]; | |
354 | char source_str[INET_ADDRSTRLEN]; | |
355 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
356 | sizeof(group_str)); | |
357 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
358 | sizeof(source_str)); | |
359 | zlog_debug( | |
dda4d23c | 360 | "Deleting IGMP source %s for group %s from interface %s c_oil ref_count %d", |
a1a4295a | 361 | source_str, group_str, group->interface->name, |
d62a17ae | 362 | source->source_channel_oil |
363 | ? source->source_channel_oil->oil_ref_count | |
364 | : 0); | |
365 | } | |
366 | ||
367 | source_timer_off(group, source); | |
368 | igmp_source_forward_stop(source); | |
369 | ||
370 | /* sanity check that forwarding has been disabled */ | |
371 | if (IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
372 | char group_str[INET_ADDRSTRLEN]; | |
373 | char source_str[INET_ADDRSTRLEN]; | |
374 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
375 | sizeof(group_str)); | |
376 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
377 | sizeof(source_str)); | |
378 | zlog_warn( | |
dda4d23c | 379 | "%s: forwarding=ON(!) IGMP source %s for group %s from interface %s", |
15569c58 | 380 | __func__, source_str, group_str, |
dda4d23c | 381 | group->interface->name); |
d62a17ae | 382 | /* warning only */ |
383 | } | |
384 | ||
385 | source_channel_oil_detach(source); | |
386 | ||
387 | /* | |
388 | notice that listnode_delete() can't be moved | |
389 | into igmp_source_free() because the later is | |
390 | called by list_delete_all_node() | |
391 | */ | |
392 | listnode_delete(group->group_source_list, source); | |
393 | ||
394 | src.s_addr = source->source_addr.s_addr; | |
395 | igmp_source_free(source); | |
396 | ||
397 | /* Group source list is empty and current source is * then | |
398 | *,G group going away so do not trigger start */ | |
399 | if (group->group_filtermode_isexcl | |
400 | && (listcount(group->group_source_list) != 0) | |
401 | && src.s_addr != INADDR_ANY) { | |
402 | group_exclude_fwd_anysrc_ifempty(group); | |
403 | } | |
12e41d03 DL |
404 | } |
405 | ||
406 | static void source_delete_by_flag(struct list *source_list) | |
407 | { | |
d62a17ae | 408 | struct listnode *src_node; |
409 | struct listnode *src_nextnode; | |
51700107 | 410 | struct gm_source *src; |
d62a17ae | 411 | |
412 | for (ALL_LIST_ELEMENTS(source_list, src_node, src_nextnode, src)) | |
413 | if (IGMP_SOURCE_TEST_DELETE(src->source_flags)) | |
414 | igmp_source_delete(src); | |
12e41d03 DL |
415 | } |
416 | ||
417 | void igmp_source_delete_expired(struct list *source_list) | |
418 | { | |
d62a17ae | 419 | struct listnode *src_node; |
420 | struct listnode *src_nextnode; | |
51700107 | 421 | struct gm_source *src; |
d62a17ae | 422 | |
423 | for (ALL_LIST_ELEMENTS(source_list, src_node, src_nextnode, src)) | |
424 | if (!src->t_source_timer) | |
425 | igmp_source_delete(src); | |
12e41d03 DL |
426 | } |
427 | ||
a16db099 SG |
428 | struct gm_source *igmp_find_source_by_addr(struct gm_group *group, |
429 | struct in_addr src_addr) | |
12e41d03 | 430 | { |
d62a17ae | 431 | struct listnode *src_node; |
51700107 | 432 | struct gm_source *src; |
12e41d03 | 433 | |
d62a17ae | 434 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) |
435 | if (src_addr.s_addr == src->source_addr.s_addr) | |
436 | return src; | |
12e41d03 | 437 | |
d62a17ae | 438 | return 0; |
12e41d03 DL |
439 | } |
440 | ||
a16db099 SG |
441 | struct gm_source *igmp_get_source_by_addr(struct gm_group *group, |
442 | struct in_addr src_addr, bool *new) | |
12e41d03 | 443 | { |
51700107 | 444 | struct gm_source *src; |
d62a17ae | 445 | |
5421bf8f DL |
446 | if (new) |
447 | *new = false; | |
448 | ||
449 | src = igmp_find_source_by_addr(group, src_addr); | |
450 | if (src) | |
451 | return src; | |
452 | ||
d62a17ae | 453 | if (PIM_DEBUG_IGMP_TRACE) { |
454 | char group_str[INET_ADDRSTRLEN]; | |
455 | char source_str[INET_ADDRSTRLEN]; | |
456 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
457 | sizeof(group_str)); | |
458 | pim_inet4_dump("<source?>", src_addr, source_str, | |
459 | sizeof(source_str)); | |
460 | zlog_debug( | |
dda4d23c DL |
461 | "Creating new IGMP source %s for group %s on interface %s", |
462 | source_str, group_str, group->interface->name); | |
d62a17ae | 463 | } |
464 | ||
465 | src = XCALLOC(MTYPE_PIM_IGMP_GROUP_SOURCE, sizeof(*src)); | |
d62a17ae | 466 | |
467 | src->t_source_timer = NULL; | |
468 | src->source_group = group; /* back pointer */ | |
469 | src->source_addr = src_addr; | |
470 | src->source_creation = pim_time_monotonic_sec(); | |
471 | src->source_flags = 0; | |
472 | src->source_query_retransmit_count = 0; | |
473 | src->source_channel_oil = NULL; | |
474 | ||
475 | listnode_add(group->group_source_list, src); | |
476 | ||
477 | /* Any source (*,G) is forwarded only if mode is EXCLUDE {empty} */ | |
478 | igmp_anysource_forward_stop(group); | |
d62a17ae | 479 | return src; |
12e41d03 DL |
480 | } |
481 | ||
c5f76fad | 482 | static void allow(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 483 | struct in_addr group_addr, int num_sources, |
484 | struct in_addr *sources) | |
12e41d03 | 485 | { |
51700107 | 486 | struct gm_source *source; |
a16db099 | 487 | struct gm_group *group; |
d62a17ae | 488 | int i; |
489 | ||
fcf5d438 SG |
490 | if (num_sources == 0) { |
491 | /* | |
492 | RFC 3376: 3.1. Socket-State | |
493 | If the requested filter mode is INCLUDE *and* the requested | |
494 | source list is empty, then the entry corresponding to the | |
495 | requested interface and multicast address is deleted if | |
496 | present. If no such entry is present, the request is ignored. | |
497 | So, deleting the group present. | |
498 | */ | |
499 | group = find_group_by_addr(igmp, group_addr); | |
26d0cbbb JAG |
500 | if (!group) { |
501 | return; | |
502 | } | |
503 | if (group->group_filtermode_isexcl) { | |
504 | if (listcount(group->group_source_list) == 1) { | |
505 | struct in_addr star = {.s_addr = INADDR_ANY}; | |
506 | ||
507 | source = igmp_find_source_by_addr(group, star); | |
508 | if (source) | |
dda4d23c | 509 | igmp_source_reset_gmi(group, source); |
26d0cbbb JAG |
510 | } |
511 | } else { | |
fcf5d438 | 512 | igmp_group_delete(group); |
26d0cbbb JAG |
513 | } |
514 | ||
fcf5d438 SG |
515 | return; |
516 | } | |
517 | ||
d62a17ae | 518 | /* non-existant group is created as INCLUDE {empty} */ |
519 | group = igmp_add_group_by_addr(igmp, group_addr); | |
520 | if (!group) { | |
521 | return; | |
522 | } | |
523 | ||
524 | /* scan received sources */ | |
525 | for (i = 0; i < num_sources; ++i) { | |
526 | struct in_addr *src_addr; | |
527 | ||
528 | src_addr = sources + i; | |
529 | ||
5421bf8f DL |
530 | source = igmp_get_source_by_addr(group, *src_addr, NULL); |
531 | if (!source) | |
d62a17ae | 532 | continue; |
d62a17ae | 533 | |
534 | /* | |
535 | RFC 3376: 6.4.1. Reception of Current-State Records | |
536 | ||
537 | When receiving IS_IN reports for groups in EXCLUDE mode is | |
538 | sources should be moved from set with (timers = 0) to set with | |
539 | (timers > 0). | |
540 | ||
541 | igmp_source_reset_gmi() below, resetting the source timers to | |
542 | GMI, accomplishes this. | |
543 | */ | |
dda4d23c | 544 | igmp_source_reset_gmi(group, source); |
d62a17ae | 545 | |
546 | } /* scan received sources */ | |
12e41d03 DL |
547 | } |
548 | ||
c5f76fad | 549 | void igmpv3_report_isin(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 550 | struct in_addr group_addr, int num_sources, |
551 | struct in_addr *sources) | |
12e41d03 | 552 | { |
15569c58 DA |
553 | on_trace(__func__, igmp->interface, from, group_addr, num_sources, |
554 | sources); | |
12e41d03 | 555 | |
d62a17ae | 556 | allow(igmp, from, group_addr, num_sources, sources); |
12e41d03 DL |
557 | } |
558 | ||
a16db099 | 559 | static void isex_excl(struct gm_group *group, int num_sources, |
d62a17ae | 560 | struct in_addr *sources) |
12e41d03 | 561 | { |
51700107 | 562 | struct gm_source *source; |
d62a17ae | 563 | int i; |
564 | ||
565 | /* EXCLUDE mode */ | |
df5dfb77 | 566 | assert(group->group_filtermode_isexcl); |
d62a17ae | 567 | |
568 | /* E.1: set deletion flag for known sources (X,Y) */ | |
569 | source_mark_delete_flag(group); | |
570 | ||
571 | /* scan received sources (A) */ | |
572 | for (i = 0; i < num_sources; ++i) { | |
573 | struct in_addr *src_addr; | |
5421bf8f | 574 | bool new; |
d62a17ae | 575 | |
576 | src_addr = sources + i; | |
577 | ||
578 | /* E.2: lookup reported source from (A) in (X,Y) */ | |
5421bf8f DL |
579 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
580 | if (!source) | |
581 | continue; | |
582 | ||
583 | if (!new) { | |
d62a17ae | 584 | /* E.3: if found, clear deletion flag: (X*A) or (Y*A) */ |
585 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
586 | } else { | |
587 | /* E.4: if not found, create source with timer=GMI: | |
588 | * (A-X-Y) */ | |
df5dfb77 | 589 | assert(!source->t_source_timer); /* timer == 0 */ |
dda4d23c | 590 | igmp_source_reset_gmi(group, source); |
df5dfb77 | 591 | assert(source->t_source_timer); /* (A-X-Y) timer > 0 */ |
d62a17ae | 592 | } |
593 | ||
594 | } /* scan received sources */ | |
595 | ||
596 | /* | |
597 | * If we are in isexcl mode and num_sources == 0 | |
598 | * than that means we have a *,g entry that | |
599 | * needs to be handled | |
600 | */ | |
601 | if (group->group_filtermode_isexcl && num_sources == 0) { | |
602 | struct in_addr star = {.s_addr = INADDR_ANY}; | |
603 | source = igmp_find_source_by_addr(group, star); | |
604 | if (source) { | |
605 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
dda4d23c | 606 | igmp_source_reset_gmi(group, source); |
d62a17ae | 607 | } |
608 | } | |
609 | ||
610 | /* E.5: delete all sources marked with deletion flag: (X-A) and (Y-A) */ | |
611 | source_delete_by_flag(group->group_source_list); | |
12e41d03 DL |
612 | } |
613 | ||
a16db099 | 614 | static void isex_incl(struct gm_group *group, int num_sources, |
d62a17ae | 615 | struct in_addr *sources) |
12e41d03 | 616 | { |
d62a17ae | 617 | int i; |
618 | ||
619 | /* INCLUDE mode */ | |
df5dfb77 | 620 | assert(!group->group_filtermode_isexcl); |
d62a17ae | 621 | |
622 | /* I.1: set deletion flag for known sources (A) */ | |
623 | source_mark_delete_flag(group); | |
624 | ||
625 | /* scan received sources (B) */ | |
626 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 627 | struct gm_source *source; |
d62a17ae | 628 | struct in_addr *src_addr; |
5421bf8f | 629 | bool new; |
d62a17ae | 630 | |
631 | src_addr = sources + i; | |
632 | ||
633 | /* I.2: lookup reported source (B) */ | |
5421bf8f DL |
634 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
635 | if (!source) | |
636 | continue; | |
637 | ||
638 | if (!new) { | |
d62a17ae | 639 | /* I.3: if found, clear deletion flag (A*B) */ |
640 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
641 | } else { | |
642 | /* I.4: if not found, create source with timer=0 (B-A) | |
643 | */ | |
df5dfb77 | 644 | assert(!source->t_source_timer); /* (B-A) timer=0 */ |
d62a17ae | 645 | } |
646 | ||
647 | } /* scan received sources */ | |
648 | ||
649 | /* I.5: delete all sources marked with deletion flag (A-B) */ | |
650 | source_delete_by_flag(group->group_source_list); | |
651 | ||
652 | group->group_filtermode_isexcl = 1; /* boolean=true */ | |
653 | ||
df5dfb77 | 654 | assert(group->group_filtermode_isexcl); |
d62a17ae | 655 | |
656 | group_exclude_fwd_anysrc_ifempty(group); | |
12e41d03 DL |
657 | } |
658 | ||
c5f76fad | 659 | void igmpv3_report_isex(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 660 | struct in_addr group_addr, int num_sources, |
661 | struct in_addr *sources, int from_igmp_v2_report) | |
12e41d03 | 662 | { |
d62a17ae | 663 | struct interface *ifp = igmp->interface; |
a16db099 | 664 | struct gm_group *group; |
d62a17ae | 665 | |
15569c58 | 666 | on_trace(__func__, ifp, from, group_addr, num_sources, sources); |
d62a17ae | 667 | |
b0f525a8 QY |
668 | if (pim_is_group_filtered(ifp->info, &group_addr)) |
669 | return; | |
670 | ||
d62a17ae | 671 | /* non-existant group is created as INCLUDE {empty} */ |
672 | group = igmp_add_group_by_addr(igmp, group_addr); | |
673 | if (!group) { | |
674 | return; | |
675 | } | |
676 | ||
677 | /* So we can display how we learned the group in our show command output | |
678 | */ | |
679 | if (from_igmp_v2_report) | |
680 | group->igmp_version = 2; | |
681 | ||
682 | if (group->group_filtermode_isexcl) { | |
683 | /* EXCLUDE mode */ | |
684 | isex_excl(group, num_sources, sources); | |
685 | } else { | |
686 | /* INCLUDE mode */ | |
687 | isex_incl(group, num_sources, sources); | |
df5dfb77 | 688 | assert(group->group_filtermode_isexcl); |
d62a17ae | 689 | } |
690 | ||
df5dfb77 | 691 | assert(group->group_filtermode_isexcl); |
d62a17ae | 692 | |
693 | igmp_group_reset_gmi(group); | |
12e41d03 DL |
694 | } |
695 | ||
a16db099 | 696 | static void toin_incl(struct gm_group *group, int num_sources, |
d62a17ae | 697 | struct in_addr *sources) |
12e41d03 | 698 | { |
d62a17ae | 699 | int num_sources_tosend = listcount(group->group_source_list); |
700 | int i; | |
701 | ||
702 | /* Set SEND flag for all known sources (A) */ | |
703 | source_mark_send_flag(group); | |
704 | ||
705 | /* Scan received sources (B) */ | |
706 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 707 | struct gm_source *source; |
d62a17ae | 708 | struct in_addr *src_addr; |
5421bf8f | 709 | bool new; |
d62a17ae | 710 | |
711 | src_addr = sources + i; | |
712 | ||
713 | /* Lookup reported source (B) */ | |
5421bf8f DL |
714 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
715 | if (!source) | |
716 | continue; | |
717 | ||
718 | if (!new) { | |
d62a17ae | 719 | /* If found, clear SEND flag (A*B) */ |
720 | IGMP_SOURCE_DONT_SEND(source->source_flags); | |
721 | --num_sources_tosend; | |
d62a17ae | 722 | } |
723 | ||
724 | /* (B)=GMI */ | |
dda4d23c | 725 | igmp_source_reset_gmi(group, source); |
d62a17ae | 726 | } |
727 | ||
728 | /* Send sources marked with SEND flag: Q(G,A-B) */ | |
729 | if (num_sources_tosend > 0) { | |
730 | source_query_send_by_flag(group, num_sources_tosend); | |
731 | } | |
12e41d03 DL |
732 | } |
733 | ||
a16db099 | 734 | static void toin_excl(struct gm_group *group, int num_sources, |
d62a17ae | 735 | struct in_addr *sources) |
12e41d03 | 736 | { |
d62a17ae | 737 | int num_sources_tosend; |
738 | int i; | |
739 | ||
740 | /* Set SEND flag for X (sources with timer > 0) */ | |
741 | num_sources_tosend = source_mark_send_flag_by_timer(group); | |
742 | ||
743 | /* Scan received sources (A) */ | |
744 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 745 | struct gm_source *source; |
d62a17ae | 746 | struct in_addr *src_addr; |
5421bf8f | 747 | bool new; |
d62a17ae | 748 | |
749 | src_addr = sources + i; | |
750 | ||
751 | /* Lookup reported source (A) */ | |
5421bf8f DL |
752 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
753 | if (!source) | |
754 | continue; | |
755 | ||
756 | if (source->t_source_timer) { | |
757 | /* If found and timer running, clear SEND flag | |
758 | * (X*A) */ | |
759 | IGMP_SOURCE_DONT_SEND(source->source_flags); | |
760 | --num_sources_tosend; | |
d62a17ae | 761 | } |
762 | ||
763 | /* (A)=GMI */ | |
dda4d23c | 764 | igmp_source_reset_gmi(group, source); |
d62a17ae | 765 | } |
766 | ||
767 | /* Send sources marked with SEND flag: Q(G,X-A) */ | |
768 | if (num_sources_tosend > 0) { | |
769 | source_query_send_by_flag(group, num_sources_tosend); | |
770 | } | |
771 | ||
772 | /* Send Q(G) */ | |
773 | group_query_send(group); | |
12e41d03 DL |
774 | } |
775 | ||
c5f76fad | 776 | void igmpv3_report_toin(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 777 | struct in_addr group_addr, int num_sources, |
778 | struct in_addr *sources) | |
12e41d03 | 779 | { |
d62a17ae | 780 | struct interface *ifp = igmp->interface; |
a16db099 | 781 | struct gm_group *group; |
d62a17ae | 782 | |
15569c58 | 783 | on_trace(__func__, ifp, from, group_addr, num_sources, sources); |
d62a17ae | 784 | |
785 | /* | |
786 | * If the requested filter mode is INCLUDE *and* the requested source | |
787 | * list is empty, then the entry corresponding to the requested | |
788 | * interface and multicast address is deleted if present. If no such | |
789 | * entry is present, the request is ignored. | |
790 | */ | |
791 | if (num_sources) { | |
792 | /* non-existant group is created as INCLUDE {empty} */ | |
793 | group = igmp_add_group_by_addr(igmp, group_addr); | |
794 | if (!group) { | |
795 | return; | |
796 | } | |
797 | } else { | |
798 | group = find_group_by_addr(igmp, group_addr); | |
799 | if (!group) | |
800 | return; | |
801 | } | |
802 | ||
803 | if (group->group_filtermode_isexcl) { | |
804 | /* EXCLUDE mode */ | |
805 | toin_excl(group, num_sources, sources); | |
806 | } else { | |
807 | /* INCLUDE mode */ | |
808 | toin_incl(group, num_sources, sources); | |
809 | } | |
12e41d03 DL |
810 | } |
811 | ||
a16db099 | 812 | static void toex_incl(struct gm_group *group, int num_sources, |
d62a17ae | 813 | struct in_addr *sources) |
12e41d03 | 814 | { |
d62a17ae | 815 | int num_sources_tosend = 0; |
816 | int i; | |
817 | ||
df5dfb77 | 818 | assert(!group->group_filtermode_isexcl); |
d62a17ae | 819 | |
820 | /* Set DELETE flag for all known sources (A) */ | |
821 | source_mark_delete_flag(group); | |
822 | ||
823 | /* Clear off SEND flag from all known sources (A) */ | |
824 | source_clear_send_flag(group->group_source_list); | |
825 | ||
826 | /* Scan received sources (B) */ | |
827 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 828 | struct gm_source *source; |
d62a17ae | 829 | struct in_addr *src_addr; |
5421bf8f | 830 | bool new; |
d62a17ae | 831 | |
832 | src_addr = sources + i; | |
833 | ||
834 | /* Lookup reported source (B) */ | |
5421bf8f DL |
835 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
836 | if (!new) { | |
d62a17ae | 837 | /* If found, clear deletion flag: (A*B) */ |
838 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
839 | /* and set SEND flag (A*B) */ | |
840 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
841 | ++num_sources_tosend; | |
d62a17ae | 842 | } |
843 | ||
844 | } /* Scan received sources (B) */ | |
845 | ||
846 | group->group_filtermode_isexcl = 1; /* boolean=true */ | |
847 | ||
848 | /* Delete all sources marked with DELETE flag (A-B) */ | |
849 | source_delete_by_flag(group->group_source_list); | |
850 | ||
851 | /* Send sources marked with SEND flag: Q(G,A*B) */ | |
852 | if (num_sources_tosend > 0) { | |
853 | source_query_send_by_flag(group, num_sources_tosend); | |
854 | } | |
855 | ||
df5dfb77 | 856 | assert(group->group_filtermode_isexcl); |
d62a17ae | 857 | |
858 | group_exclude_fwd_anysrc_ifempty(group); | |
12e41d03 DL |
859 | } |
860 | ||
a16db099 | 861 | static void toex_excl(struct gm_group *group, int num_sources, |
d62a17ae | 862 | struct in_addr *sources) |
12e41d03 | 863 | { |
d62a17ae | 864 | int num_sources_tosend = 0; |
865 | int i; | |
866 | ||
867 | /* set DELETE flag for all known sources (X,Y) */ | |
868 | source_mark_delete_flag(group); | |
869 | ||
870 | /* clear off SEND flag from all known sources (X,Y) */ | |
871 | source_clear_send_flag(group->group_source_list); | |
872 | ||
873 | if (num_sources == 0) { | |
51700107 | 874 | struct gm_source *source; |
d62a17ae | 875 | struct in_addr any = {.s_addr = INADDR_ANY}; |
876 | ||
877 | source = igmp_find_source_by_addr(group, any); | |
878 | if (source) | |
879 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
880 | } | |
881 | ||
882 | /* scan received sources (A) */ | |
883 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 884 | struct gm_source *source; |
d62a17ae | 885 | struct in_addr *src_addr; |
5421bf8f | 886 | bool new; |
d62a17ae | 887 | |
888 | src_addr = sources + i; | |
889 | ||
890 | /* lookup reported source (A) in known sources (X,Y) */ | |
5421bf8f DL |
891 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
892 | if (!source) | |
893 | continue; | |
894 | ||
895 | if (!new) { | |
d62a17ae | 896 | /* if found, clear off DELETE flag from reported source |
897 | * (A) */ | |
898 | IGMP_SOURCE_DONT_DELETE(source->source_flags); | |
899 | } else { | |
900 | /* if not found, create source with Group Timer: | |
901 | * (A-X-Y)=Group Timer */ | |
902 | long group_timer_msec; | |
d62a17ae | 903 | |
df5dfb77 | 904 | assert(!source->t_source_timer); /* timer == 0 */ |
d62a17ae | 905 | group_timer_msec = igmp_group_timer_remain_msec(group); |
906 | igmp_source_timer_on(group, source, group_timer_msec); | |
df5dfb77 | 907 | assert(source->t_source_timer); /* (A-X-Y) timer > 0 */ |
d62a17ae | 908 | |
909 | /* make sure source is created with DELETE flag unset */ | |
df5dfb77 | 910 | assert(!IGMP_SOURCE_TEST_DELETE(source->source_flags)); |
d62a17ae | 911 | } |
912 | ||
913 | /* make sure reported source has DELETE flag unset */ | |
df5dfb77 | 914 | assert(!IGMP_SOURCE_TEST_DELETE(source->source_flags)); |
d62a17ae | 915 | |
916 | if (source->t_source_timer) { | |
917 | /* if source timer>0 mark SEND flag: Q(G,A-Y) */ | |
918 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
919 | ++num_sources_tosend; | |
920 | } | |
921 | ||
922 | } /* scan received sources (A) */ | |
923 | ||
924 | /* | |
925 | delete all sources marked with DELETE flag: | |
926 | Delete (X-A) | |
927 | Delete (Y-A) | |
928 | */ | |
929 | source_delete_by_flag(group->group_source_list); | |
930 | ||
931 | /* send sources marked with SEND flag: Q(G,A-Y) */ | |
932 | if (num_sources_tosend > 0) { | |
933 | source_query_send_by_flag(group, num_sources_tosend); | |
934 | } | |
12e41d03 DL |
935 | } |
936 | ||
c5f76fad | 937 | void igmpv3_report_toex(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 938 | struct in_addr group_addr, int num_sources, |
939 | struct in_addr *sources) | |
12e41d03 | 940 | { |
d62a17ae | 941 | struct interface *ifp = igmp->interface; |
a16db099 | 942 | struct gm_group *group; |
d62a17ae | 943 | |
15569c58 | 944 | on_trace(__func__, ifp, from, group_addr, num_sources, sources); |
d62a17ae | 945 | |
946 | /* non-existant group is created as INCLUDE {empty} */ | |
947 | group = igmp_add_group_by_addr(igmp, group_addr); | |
948 | if (!group) { | |
949 | return; | |
950 | } | |
951 | ||
952 | if (group->group_filtermode_isexcl) { | |
953 | /* EXCLUDE mode */ | |
954 | toex_excl(group, num_sources, sources); | |
955 | } else { | |
956 | /* INCLUDE mode */ | |
957 | toex_incl(group, num_sources, sources); | |
df5dfb77 | 958 | assert(group->group_filtermode_isexcl); |
d62a17ae | 959 | } |
df5dfb77 | 960 | assert(group->group_filtermode_isexcl); |
d62a17ae | 961 | |
962 | /* Group Timer=GMI */ | |
963 | igmp_group_reset_gmi(group); | |
12e41d03 DL |
964 | } |
965 | ||
c5f76fad | 966 | void igmpv3_report_allow(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 967 | struct in_addr group_addr, int num_sources, |
968 | struct in_addr *sources) | |
12e41d03 | 969 | { |
15569c58 DA |
970 | on_trace(__func__, igmp->interface, from, group_addr, num_sources, |
971 | sources); | |
12e41d03 | 972 | |
d62a17ae | 973 | allow(igmp, from, group_addr, num_sources, sources); |
12e41d03 DL |
974 | } |
975 | ||
a16db099 | 976 | static void igmp_send_query_group(struct gm_group *group, char *query_buf, |
dda4d23c DL |
977 | size_t query_buf_size, int num_sources, |
978 | int s_flag) | |
979 | { | |
980 | struct interface *ifp = group->interface; | |
981 | struct pim_interface *pim_ifp = ifp->info; | |
c5f76fad | 982 | struct gm_sock *igmp; |
dda4d23c DL |
983 | struct listnode *sock_node; |
984 | ||
18adcff1 | 985 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->gm_socket_list, sock_node, igmp)) { |
29e58225 DL |
986 | igmp_send_query( |
987 | pim_ifp->igmp_version, group, igmp->fd, ifp->name, | |
988 | query_buf, query_buf_size, num_sources, | |
989 | group->group_addr, group->group_addr, | |
18adcff1 | 990 | pim_ifp->gm_specific_query_max_response_time_dsec, |
29e58225 DL |
991 | s_flag, igmp->querier_robustness_variable, |
992 | igmp->querier_query_interval); | |
dda4d23c DL |
993 | } |
994 | } | |
995 | ||
12e41d03 DL |
996 | /* |
997 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
998 | ||
999 | When transmitting a group specific query, if the group timer is | |
1000 | larger than LMQT, the "Suppress Router-Side Processing" bit is set | |
1001 | in the query message. | |
1002 | */ | |
a16db099 | 1003 | static void group_retransmit_group(struct gm_group *group) |
12e41d03 | 1004 | { |
d62a17ae | 1005 | struct pim_interface *pim_ifp; |
1006 | long lmqc; /* Last Member Query Count */ | |
1007 | long lmqi_msec; /* Last Member Query Interval */ | |
1008 | long lmqt_msec; /* Last Member Query Time */ | |
1009 | int s_flag; | |
1010 | int query_buf_size; | |
1011 | ||
dda4d23c | 1012 | pim_ifp = group->interface->info; |
d62a17ae | 1013 | |
29e58225 | 1014 | if (pim_ifp->igmp_version == 3) { |
d62a17ae | 1015 | query_buf_size = PIM_IGMP_BUFSIZE_WRITE; |
1016 | } else { | |
1017 | query_buf_size = IGMP_V12_MSG_SIZE; | |
1018 | } | |
1019 | ||
1020 | char query_buf[query_buf_size]; | |
1021 | ||
18adcff1 SG |
1022 | lmqc = pim_ifp->gm_last_member_query_count; |
1023 | lmqi_msec = 100 * pim_ifp->gm_specific_query_max_response_time_dsec; | |
d62a17ae | 1024 | lmqt_msec = lmqc * lmqi_msec; |
1025 | ||
1026 | /* | |
1027 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
1028 | ||
1029 | When transmitting a group specific query, if the group timer is | |
1030 | larger than LMQT, the "Suppress Router-Side Processing" bit is set | |
1031 | in the query message. | |
1032 | */ | |
1033 | s_flag = igmp_group_timer_remain_msec(group) > lmqt_msec; | |
1034 | ||
1035 | if (PIM_DEBUG_IGMP_TRACE) { | |
1036 | char group_str[INET_ADDRSTRLEN]; | |
1037 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1038 | sizeof(group_str)); | |
1039 | zlog_debug( | |
1040 | "retransmit_group_specific_query: group %s on %s: s_flag=%d count=%d", | |
dda4d23c | 1041 | group_str, group->interface->name, s_flag, |
d62a17ae | 1042 | group->group_specific_query_retransmit_count); |
1043 | } | |
1044 | ||
1045 | /* | |
1046 | RFC3376: 4.1.12. IP Destination Addresses for Queries | |
1047 | ||
1048 | Group-Specific and Group-and-Source-Specific Queries are sent with | |
1049 | an IP destination address equal to the multicast address of | |
1050 | interest. | |
1051 | */ | |
1052 | ||
dda4d23c | 1053 | igmp_send_query_group(group, query_buf, sizeof(query_buf), 0, s_flag); |
12e41d03 DL |
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 | */ | |
a16db099 | 1068 | static int group_retransmit_sources(struct gm_group *group, |
12e41d03 DL |
1069 | int send_with_sflag_set) |
1070 | { | |
d62a17ae | 1071 | struct pim_interface *pim_ifp; |
1072 | long lmqc; /* Last Member Query Count */ | |
1073 | long lmqi_msec; /* Last Member Query Interval */ | |
1074 | long lmqt_msec; /* Last Member Query Time */ | |
1075 | char query_buf1[PIM_IGMP_BUFSIZE_WRITE]; /* 1 = with s_flag set */ | |
1076 | char query_buf2[PIM_IGMP_BUFSIZE_WRITE]; /* 2 = with s_flag clear */ | |
1077 | int query_buf1_max_sources; | |
1078 | int query_buf2_max_sources; | |
1079 | struct in_addr *source_addr1; | |
1080 | struct in_addr *source_addr2; | |
1081 | int num_sources_tosend1; | |
1082 | int num_sources_tosend2; | |
1083 | struct listnode *src_node; | |
51700107 | 1084 | struct gm_source *src; |
d62a17ae | 1085 | int num_retransmit_sources_left = 0; |
1086 | ||
1087 | source_addr1 = (struct in_addr *)(query_buf1 + IGMP_V3_SOURCES_OFFSET); | |
1088 | source_addr2 = (struct in_addr *)(query_buf2 + IGMP_V3_SOURCES_OFFSET); | |
1089 | ||
dda4d23c | 1090 | pim_ifp = group->interface->info; |
d62a17ae | 1091 | |
18adcff1 SG |
1092 | lmqc = pim_ifp->gm_last_member_query_count; |
1093 | lmqi_msec = 100 * pim_ifp->gm_specific_query_max_response_time_dsec; | |
d62a17ae | 1094 | lmqt_msec = lmqc * lmqi_msec; |
1095 | ||
1096 | /* Scan all group sources */ | |
1097 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { | |
1098 | ||
1099 | /* Source has retransmission state? */ | |
1100 | if (src->source_query_retransmit_count < 1) | |
1101 | continue; | |
1102 | ||
1103 | if (--src->source_query_retransmit_count > 0) { | |
1104 | ++num_retransmit_sources_left; | |
1105 | } | |
1106 | ||
1107 | /* Copy source address into appropriate query buffer */ | |
1108 | if (igmp_source_timer_remain_msec(src) > lmqt_msec) { | |
1109 | *source_addr1 = src->source_addr; | |
1110 | ++source_addr1; | |
1111 | } else { | |
1112 | *source_addr2 = src->source_addr; | |
1113 | ++source_addr2; | |
1114 | } | |
1115 | } | |
1116 | ||
1117 | num_sources_tosend1 = | |
1118 | source_addr1 | |
1119 | - (struct in_addr *)(query_buf1 + IGMP_V3_SOURCES_OFFSET); | |
1120 | num_sources_tosend2 = | |
1121 | source_addr2 | |
1122 | - (struct in_addr *)(query_buf2 + IGMP_V3_SOURCES_OFFSET); | |
1123 | ||
1124 | if (PIM_DEBUG_IGMP_TRACE) { | |
1125 | char group_str[INET_ADDRSTRLEN]; | |
1126 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1127 | sizeof(group_str)); | |
1128 | zlog_debug( | |
1129 | "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 | 1130 | group_str, group->interface->name, num_sources_tosend1, |
d62a17ae | 1131 | num_sources_tosend2, send_with_sflag_set, |
1132 | num_retransmit_sources_left); | |
1133 | } | |
1134 | ||
1135 | if (num_sources_tosend1 > 0) { | |
1136 | /* | |
1137 | Send group-and-source-specific query with s_flag set and all | |
1138 | sources with timers greater than LMQT. | |
1139 | */ | |
1140 | ||
1141 | if (send_with_sflag_set) { | |
1142 | ||
1143 | query_buf1_max_sources = | |
1144 | (sizeof(query_buf1) - IGMP_V3_SOURCES_OFFSET) | |
1145 | >> 2; | |
1146 | if (num_sources_tosend1 > query_buf1_max_sources) { | |
1147 | char group_str[INET_ADDRSTRLEN]; | |
1148 | pim_inet4_dump("<group?>", group->group_addr, | |
1149 | group_str, sizeof(group_str)); | |
1150 | zlog_warn( | |
1151 | "%s: group %s on %s: s_flag=1 unable to fit %d sources into buf_size=%zu (max_sources=%d)", | |
5e81f5dd | 1152 | __func__, group_str, |
dda4d23c | 1153 | group->interface->name, |
d62a17ae | 1154 | num_sources_tosend1, sizeof(query_buf1), |
1155 | query_buf1_max_sources); | |
1156 | } else { | |
1157 | /* | |
1158 | RFC3376: 4.1.12. IP Destination Addresses for | |
1159 | Queries | |
1160 | ||
1161 | Group-Specific and Group-and-Source-Specific | |
1162 | Queries are sent with | |
1163 | an IP destination address equal to the | |
1164 | multicast address of | |
1165 | interest. | |
1166 | */ | |
1167 | ||
a1a4295a DL |
1168 | igmp_send_query_group( |
1169 | group, query_buf1, sizeof(query_buf1), | |
1170 | num_sources_tosend1, 1 /* s_flag */); | |
d62a17ae | 1171 | } |
1172 | ||
1173 | } /* send_with_sflag_set */ | |
1174 | } | |
1175 | ||
1176 | if (num_sources_tosend2 > 0) { | |
1177 | /* | |
1178 | Send group-and-source-specific query with s_flag clear and all | |
1179 | sources with timers lower or equal to LMQT. | |
1180 | */ | |
1181 | ||
1182 | query_buf2_max_sources = | |
1183 | (sizeof(query_buf2) - IGMP_V3_SOURCES_OFFSET) >> 2; | |
1184 | if (num_sources_tosend2 > query_buf2_max_sources) { | |
1185 | char group_str[INET_ADDRSTRLEN]; | |
1186 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1187 | sizeof(group_str)); | |
1188 | zlog_warn( | |
1189 | "%s: group %s on %s: s_flag=0 unable to fit %d sources into buf_size=%zu (max_sources=%d)", | |
dda4d23c | 1190 | __func__, group_str, group->interface->name, |
5e81f5dd DS |
1191 | num_sources_tosend2, sizeof(query_buf2), |
1192 | query_buf2_max_sources); | |
d62a17ae | 1193 | } else { |
1194 | /* | |
1195 | RFC3376: 4.1.12. IP Destination Addresses for Queries | |
1196 | ||
1197 | Group-Specific and Group-and-Source-Specific Queries | |
1198 | are sent with | |
1199 | an IP destination address equal to the multicast | |
1200 | address of | |
1201 | interest. | |
1202 | */ | |
1203 | ||
a1a4295a DL |
1204 | igmp_send_query_group( |
1205 | group, query_buf2, sizeof(query_buf2), | |
1206 | num_sources_tosend2, 0 /* s_flag */); | |
d62a17ae | 1207 | } |
1208 | } | |
1209 | ||
1210 | return num_retransmit_sources_left; | |
12e41d03 DL |
1211 | } |
1212 | ||
cc9f21da | 1213 | static void igmp_group_retransmit(struct thread *t) |
12e41d03 | 1214 | { |
a16db099 | 1215 | struct gm_group *group; |
d62a17ae | 1216 | int num_retransmit_sources_left; |
1217 | int send_with_sflag_set; /* boolean */ | |
1218 | ||
1219 | group = THREAD_ARG(t); | |
1220 | ||
1221 | if (PIM_DEBUG_IGMP_TRACE) { | |
1222 | char group_str[INET_ADDRSTRLEN]; | |
1223 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1224 | sizeof(group_str)); | |
1225 | zlog_debug("group_retransmit_timer: group %s on %s", group_str, | |
dda4d23c | 1226 | group->interface->name); |
d62a17ae | 1227 | } |
1228 | ||
1229 | /* Retransmit group-specific queries? (RFC3376: 6.6.3.1) */ | |
1230 | if (group->group_specific_query_retransmit_count > 0) { | |
1231 | ||
1232 | /* Retransmit group-specific queries (RFC3376: 6.6.3.1) */ | |
1233 | group_retransmit_group(group); | |
1234 | --group->group_specific_query_retransmit_count; | |
1235 | ||
1236 | /* | |
1237 | RFC3376: 6.6.3.2 | |
1238 | If a group specific query is scheduled to be transmitted at | |
1239 | the | |
1240 | same time as a group and source specific query for the same | |
1241 | group, | |
1242 | then transmission of the group and source specific message | |
1243 | with the | |
1244 | "Suppress Router-Side Processing" bit set may be suppressed. | |
1245 | */ | |
1246 | send_with_sflag_set = 0; /* boolean=false */ | |
1247 | } else { | |
1248 | send_with_sflag_set = 1; /* boolean=true */ | |
1249 | } | |
1250 | ||
1251 | /* Retransmit group-and-source-specific queries (RFC3376: 6.6.3.2) */ | |
1252 | num_retransmit_sources_left = | |
1253 | group_retransmit_sources(group, send_with_sflag_set); | |
1254 | ||
1255 | /* | |
1256 | Keep group retransmit timer running if there is any retransmit | |
1257 | counter pending | |
1258 | */ | |
1259 | if ((num_retransmit_sources_left > 0) | |
1260 | || (group->group_specific_query_retransmit_count > 0)) { | |
1261 | group_retransmit_timer_on(group); | |
1262 | } | |
12e41d03 DL |
1263 | } |
1264 | ||
1265 | /* | |
1266 | group_retransmit_timer_on: | |
1267 | if group retransmit timer isn't running, starts it; | |
1268 | otherwise, do nothing | |
1269 | */ | |
a16db099 | 1270 | static void group_retransmit_timer_on(struct gm_group *group) |
12e41d03 | 1271 | { |
d62a17ae | 1272 | struct pim_interface *pim_ifp; |
1273 | long lmqi_msec; /* Last Member Query Interval */ | |
1274 | ||
1275 | /* if group retransmit timer is running, do nothing */ | |
1276 | if (group->t_group_query_retransmit_timer) { | |
1277 | return; | |
1278 | } | |
1279 | ||
dda4d23c | 1280 | pim_ifp = group->interface->info; |
d62a17ae | 1281 | |
18adcff1 | 1282 | lmqi_msec = 100 * pim_ifp->gm_specific_query_max_response_time_dsec; |
d62a17ae | 1283 | |
1284 | if (PIM_DEBUG_IGMP_TRACE) { | |
1285 | char group_str[INET_ADDRSTRLEN]; | |
1286 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1287 | sizeof(group_str)); | |
1288 | zlog_debug( | |
1289 | "Scheduling %ld.%03ld sec retransmit timer for group %s on %s", | |
1290 | lmqi_msec / 1000, lmqi_msec % 1000, group_str, | |
dda4d23c | 1291 | group->interface->name); |
d62a17ae | 1292 | } |
1293 | ||
36417fcc DS |
1294 | thread_add_timer_msec(router->master, igmp_group_retransmit, group, |
1295 | lmqi_msec, | |
d62a17ae | 1296 | &group->t_group_query_retransmit_timer); |
12e41d03 DL |
1297 | } |
1298 | ||
a16db099 | 1299 | static long igmp_group_timer_remain_msec(struct gm_group *group) |
12e41d03 | 1300 | { |
d62a17ae | 1301 | return pim_time_timer_remain_msec(group->t_group_timer); |
12e41d03 DL |
1302 | } |
1303 | ||
51700107 | 1304 | static long igmp_source_timer_remain_msec(struct gm_source *source) |
12e41d03 | 1305 | { |
d62a17ae | 1306 | return pim_time_timer_remain_msec(source->t_source_timer); |
12e41d03 DL |
1307 | } |
1308 | ||
1309 | /* | |
1310 | RFC3376: 6.6.3.1. Building and Sending Group Specific Queries | |
1311 | */ | |
a16db099 | 1312 | static void group_query_send(struct gm_group *group) |
12e41d03 | 1313 | { |
59115451 | 1314 | struct pim_interface *pim_ifp; |
d62a17ae | 1315 | long lmqc; /* Last Member Query Count */ |
12e41d03 | 1316 | |
dda4d23c | 1317 | pim_ifp = group->interface->info; |
18adcff1 | 1318 | lmqc = pim_ifp->gm_last_member_query_count; |
12e41d03 | 1319 | |
d62a17ae | 1320 | /* lower group timer to lmqt */ |
1321 | igmp_group_timer_lower_to_lmqt(group); | |
12e41d03 | 1322 | |
d62a17ae | 1323 | /* reset retransmission counter */ |
1324 | group->group_specific_query_retransmit_count = lmqc; | |
12e41d03 | 1325 | |
d62a17ae | 1326 | /* immediately send group specific query (decrease retransmit counter by |
1327 | * 1)*/ | |
1328 | group_retransmit_group(group); | |
12e41d03 | 1329 | |
d62a17ae | 1330 | /* make sure group retransmit timer is running */ |
1331 | group_retransmit_timer_on(group); | |
12e41d03 DL |
1332 | } |
1333 | ||
1334 | /* | |
1335 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific Queries | |
1336 | */ | |
a16db099 | 1337 | static void source_query_send_by_flag(struct gm_group *group, |
12e41d03 DL |
1338 | int num_sources_tosend) |
1339 | { | |
d62a17ae | 1340 | struct pim_interface *pim_ifp; |
1341 | struct listnode *src_node; | |
51700107 | 1342 | struct gm_source *src; |
d62a17ae | 1343 | long lmqc; /* Last Member Query Count */ |
1344 | long lmqi_msec; /* Last Member Query Interval */ | |
1345 | long lmqt_msec; /* Last Member Query Time */ | |
1346 | ||
df5dfb77 | 1347 | assert(num_sources_tosend > 0); |
d62a17ae | 1348 | |
dda4d23c | 1349 | pim_ifp = group->interface->info; |
d62a17ae | 1350 | |
18adcff1 SG |
1351 | lmqc = pim_ifp->gm_last_member_query_count; |
1352 | lmqi_msec = 100 * pim_ifp->gm_specific_query_max_response_time_dsec; | |
d62a17ae | 1353 | lmqt_msec = lmqc * lmqi_msec; |
1354 | ||
1355 | /* | |
1356 | RFC3376: 6.6.3.2. Building and Sending Group and Source Specific | |
1357 | Queries | |
1358 | ||
1359 | (...) for each of the sources in X of group G, with source timer | |
1360 | larger | |
1361 | than LMQT: | |
1362 | o Set number of retransmissions for each source to [Last Member | |
1363 | Query Count]. | |
1364 | o Lower source timer to LMQT. | |
1365 | */ | |
1366 | for (ALL_LIST_ELEMENTS_RO(group->group_source_list, src_node, src)) { | |
1367 | if (IGMP_SOURCE_TEST_SEND(src->source_flags)) { | |
1368 | /* source "src" in X of group G */ | |
1369 | if (igmp_source_timer_remain_msec(src) > lmqt_msec) { | |
1370 | src->source_query_retransmit_count = lmqc; | |
1371 | igmp_source_timer_lower_to_lmqt(src); | |
1372 | } | |
1373 | } | |
1374 | } | |
1375 | ||
1376 | /* send group-and-source specific queries */ | |
1377 | group_retransmit_sources(group, 1 /* send_with_sflag_set=true */); | |
1378 | ||
1379 | /* make sure group retransmit timer is running */ | |
1380 | group_retransmit_timer_on(group); | |
12e41d03 DL |
1381 | } |
1382 | ||
a16db099 | 1383 | static void block_excl(struct gm_group *group, int num_sources, |
d62a17ae | 1384 | struct in_addr *sources) |
12e41d03 | 1385 | { |
d62a17ae | 1386 | int num_sources_tosend = 0; |
1387 | int i; | |
1388 | ||
1389 | /* 1. clear off SEND flag from all known sources (X,Y) */ | |
1390 | source_clear_send_flag(group->group_source_list); | |
1391 | ||
1392 | /* 2. scan received sources (A) */ | |
1393 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 1394 | struct gm_source *source; |
d62a17ae | 1395 | struct in_addr *src_addr; |
5421bf8f | 1396 | bool new; |
d62a17ae | 1397 | |
1398 | src_addr = sources + i; | |
1399 | ||
1400 | /* lookup reported source (A) in known sources (X,Y) */ | |
5421bf8f DL |
1401 | source = igmp_get_source_by_addr(group, *src_addr, &new); |
1402 | if (!source) | |
1403 | continue; | |
1404 | ||
1405 | if (new) { | |
d62a17ae | 1406 | /* 3: if not found, create source with Group Timer: |
1407 | * (A-X-Y)=Group Timer */ | |
1408 | long group_timer_msec; | |
d62a17ae | 1409 | |
df5dfb77 | 1410 | assert(!source->t_source_timer); /* timer == 0 */ |
d62a17ae | 1411 | group_timer_msec = igmp_group_timer_remain_msec(group); |
1412 | igmp_source_timer_on(group, source, group_timer_msec); | |
df5dfb77 | 1413 | assert(source->t_source_timer); /* (A-X-Y) timer > 0 */ |
d62a17ae | 1414 | } |
1415 | ||
1416 | if (source->t_source_timer) { | |
1417 | /* 4. if source timer>0 mark SEND flag: Q(G,A-Y) */ | |
1418 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
1419 | ++num_sources_tosend; | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | /* 5. send sources marked with SEND flag: Q(G,A-Y) */ | |
1424 | if (num_sources_tosend > 0) { | |
1425 | source_query_send_by_flag(group, num_sources_tosend); | |
1426 | } | |
12e41d03 DL |
1427 | } |
1428 | ||
a16db099 | 1429 | static void block_incl(struct gm_group *group, int num_sources, |
d62a17ae | 1430 | struct in_addr *sources) |
12e41d03 | 1431 | { |
d62a17ae | 1432 | int num_sources_tosend = 0; |
1433 | int i; | |
1434 | ||
1435 | /* 1. clear off SEND flag from all known sources (B) */ | |
1436 | source_clear_send_flag(group->group_source_list); | |
1437 | ||
1438 | /* 2. scan received sources (A) */ | |
1439 | for (i = 0; i < num_sources; ++i) { | |
51700107 | 1440 | struct gm_source *source; |
d62a17ae | 1441 | struct in_addr *src_addr; |
1442 | ||
1443 | src_addr = sources + i; | |
1444 | ||
1445 | /* lookup reported source (A) in known sources (B) */ | |
1446 | source = igmp_find_source_by_addr(group, *src_addr); | |
1447 | if (source) { | |
1448 | /* 3. if found (A*B), mark SEND flag: Q(G,A*B) */ | |
1449 | IGMP_SOURCE_DO_SEND(source->source_flags); | |
1450 | ++num_sources_tosend; | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | /* 4. send sources marked with SEND flag: Q(G,A*B) */ | |
1455 | if (num_sources_tosend > 0) { | |
1456 | source_query_send_by_flag(group, num_sources_tosend); | |
1457 | } | |
12e41d03 DL |
1458 | } |
1459 | ||
c5f76fad | 1460 | void igmpv3_report_block(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 1461 | struct in_addr group_addr, int num_sources, |
1462 | struct in_addr *sources) | |
12e41d03 | 1463 | { |
d62a17ae | 1464 | struct interface *ifp = igmp->interface; |
a16db099 | 1465 | struct gm_group *group; |
d62a17ae | 1466 | |
15569c58 | 1467 | on_trace(__func__, ifp, from, group_addr, num_sources, sources); |
d62a17ae | 1468 | |
1469 | /* non-existant group is created as INCLUDE {empty} */ | |
1470 | group = igmp_add_group_by_addr(igmp, group_addr); | |
1471 | if (!group) { | |
1472 | return; | |
1473 | } | |
1474 | ||
1475 | if (group->group_filtermode_isexcl) { | |
1476 | /* EXCLUDE mode */ | |
1477 | block_excl(group, num_sources, sources); | |
1478 | } else { | |
1479 | /* INCLUDE mode */ | |
1480 | block_incl(group, num_sources, sources); | |
1481 | } | |
12e41d03 DL |
1482 | } |
1483 | ||
a16db099 | 1484 | void igmp_group_timer_lower_to_lmqt(struct gm_group *group) |
12e41d03 | 1485 | { |
d62a17ae | 1486 | struct interface *ifp; |
1487 | struct pim_interface *pim_ifp; | |
1488 | char *ifname; | |
1489 | int lmqi_dsec; /* Last Member Query Interval */ | |
1490 | int lmqc; /* Last Member Query Count */ | |
1491 | int lmqt_msec; /* Last Member Query Time */ | |
1492 | ||
1493 | /* | |
1494 | RFC 3376: 6.2.2. Definition of Group Timers | |
1495 | ||
1496 | The group timer is only used when a group is in EXCLUDE mode and | |
1497 | it represents the time for the *filter-mode* of the group to | |
1498 | expire and switch to INCLUDE mode. | |
1499 | */ | |
1500 | if (!group->group_filtermode_isexcl) { | |
1501 | return; | |
1502 | } | |
1503 | ||
dda4d23c | 1504 | ifp = group->interface; |
d62a17ae | 1505 | pim_ifp = ifp->info; |
1506 | ifname = ifp->name; | |
1507 | ||
18adcff1 SG |
1508 | lmqi_dsec = pim_ifp->gm_specific_query_max_response_time_dsec; |
1509 | lmqc = pim_ifp->gm_last_member_query_count; | |
d62a17ae | 1510 | lmqt_msec = PIM_IGMP_LMQT_MSEC( |
1511 | lmqi_dsec, lmqc); /* lmqt_msec = (100 * lmqi_dsec) * lmqc */ | |
1512 | ||
1513 | if (PIM_DEBUG_IGMP_TRACE) { | |
1514 | char group_str[INET_ADDRSTRLEN]; | |
1515 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1516 | sizeof(group_str)); | |
1517 | zlog_debug( | |
1518 | "%s: group %s on %s: LMQC=%d LMQI=%d dsec LMQT=%d msec", | |
15569c58 | 1519 | __func__, group_str, ifname, lmqc, lmqi_dsec, |
d62a17ae | 1520 | lmqt_msec); |
1521 | } | |
1522 | ||
df5dfb77 | 1523 | assert(group->group_filtermode_isexcl); |
d62a17ae | 1524 | |
1525 | igmp_group_timer_on(group, lmqt_msec, ifname); | |
12e41d03 DL |
1526 | } |
1527 | ||
51700107 | 1528 | void igmp_source_timer_lower_to_lmqt(struct gm_source *source) |
12e41d03 | 1529 | { |
a16db099 | 1530 | struct gm_group *group; |
d62a17ae | 1531 | struct interface *ifp; |
1532 | struct pim_interface *pim_ifp; | |
1533 | char *ifname; | |
1534 | int lmqi_dsec; /* Last Member Query Interval */ | |
1535 | int lmqc; /* Last Member Query Count */ | |
1536 | int lmqt_msec; /* Last Member Query Time */ | |
1537 | ||
1538 | group = source->source_group; | |
dda4d23c | 1539 | ifp = group->interface; |
d62a17ae | 1540 | pim_ifp = ifp->info; |
1541 | ifname = ifp->name; | |
1542 | ||
18adcff1 SG |
1543 | lmqi_dsec = pim_ifp->gm_specific_query_max_response_time_dsec; |
1544 | lmqc = pim_ifp->gm_last_member_query_count; | |
d62a17ae | 1545 | lmqt_msec = PIM_IGMP_LMQT_MSEC( |
1546 | lmqi_dsec, lmqc); /* lmqt_msec = (100 * lmqi_dsec) * lmqc */ | |
1547 | ||
1548 | if (PIM_DEBUG_IGMP_TRACE) { | |
1549 | char group_str[INET_ADDRSTRLEN]; | |
1550 | char source_str[INET_ADDRSTRLEN]; | |
1551 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1552 | sizeof(group_str)); | |
1553 | pim_inet4_dump("<source?>", source->source_addr, source_str, | |
1554 | sizeof(source_str)); | |
1555 | zlog_debug( | |
1556 | "%s: group %s source %s on %s: LMQC=%d LMQI=%d dsec LMQT=%d msec", | |
15569c58 DA |
1557 | __func__, group_str, source_str, ifname, lmqc, |
1558 | lmqi_dsec, lmqt_msec); | |
d62a17ae | 1559 | } |
1560 | ||
1561 | igmp_source_timer_on(group, source, lmqt_msec); | |
12e41d03 DL |
1562 | } |
1563 | ||
a16db099 | 1564 | void igmp_v3_send_query(struct gm_group *group, int fd, const char *ifname, |
d62a17ae | 1565 | char *query_buf, int query_buf_size, int num_sources, |
1566 | struct in_addr dst_addr, struct in_addr group_addr, | |
1567 | int query_max_response_time_dsec, uint8_t s_flag, | |
1568 | uint8_t querier_robustness_variable, | |
1569 | uint16_t querier_query_interval) | |
12e41d03 | 1570 | { |
d62a17ae | 1571 | ssize_t msg_size; |
1572 | uint8_t max_resp_code; | |
1573 | uint8_t qqic; | |
1574 | ssize_t sent; | |
1575 | struct sockaddr_in to; | |
1576 | socklen_t tolen; | |
1577 | uint16_t checksum; | |
1578 | ||
df5dfb77 | 1579 | assert(num_sources >= 0); |
d62a17ae | 1580 | |
1581 | msg_size = IGMP_V3_SOURCES_OFFSET + (num_sources << 2); | |
1582 | if (msg_size > query_buf_size) { | |
af4c2728 | 1583 | flog_err( |
450971aa | 1584 | EC_LIB_DEVELOPMENT, |
d62a17ae | 1585 | "%s %s: unable to send: msg_size=%zd larger than query_buf_size=%d", |
15569c58 | 1586 | __FILE__, __func__, msg_size, query_buf_size); |
d62a17ae | 1587 | return; |
1588 | } | |
1589 | ||
1590 | s_flag = PIM_FORCE_BOOLEAN(s_flag); | |
df5dfb77 | 1591 | assert((s_flag == 0) || (s_flag == 1)); |
d62a17ae | 1592 | |
1593 | max_resp_code = igmp_msg_encode16to8(query_max_response_time_dsec); | |
1594 | qqic = igmp_msg_encode16to8(querier_query_interval); | |
1595 | ||
1596 | /* | |
1597 | RFC 3376: 4.1.6. QRV (Querier's Robustness Variable) | |
1598 | ||
1599 | If non-zero, the QRV field contains the [Robustness Variable] | |
1600 | value used by the querier, i.e., the sender of the Query. If the | |
1601 | querier's [Robustness Variable] exceeds 7, the maximum value of | |
1602 | the QRV field, the QRV is set to zero. | |
1603 | */ | |
1604 | if (querier_robustness_variable > 7) { | |
1605 | querier_robustness_variable = 0; | |
1606 | } | |
1607 | ||
1608 | query_buf[0] = PIM_IGMP_MEMBERSHIP_QUERY; | |
1609 | query_buf[1] = max_resp_code; | |
1610 | *(uint16_t *)(query_buf + IGMP_CHECKSUM_OFFSET) = | |
1611 | 0; /* for computing checksum */ | |
1612 | memcpy(query_buf + 4, &group_addr, sizeof(struct in_addr)); | |
1613 | ||
1614 | query_buf[8] = (s_flag << 3) | querier_robustness_variable; | |
1615 | query_buf[9] = qqic; | |
1616 | *(uint16_t *)(query_buf + IGMP_V3_NUMSOURCES_OFFSET) = | |
1617 | htons(num_sources); | |
1618 | ||
1619 | checksum = in_cksum(query_buf, msg_size); | |
1620 | *(uint16_t *)(query_buf + IGMP_CHECKSUM_OFFSET) = checksum; | |
1621 | ||
1622 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1623 | char dst_str[INET_ADDRSTRLEN]; | |
1624 | char group_str[INET_ADDRSTRLEN]; | |
1625 | pim_inet4_dump("<dst?>", dst_addr, dst_str, sizeof(dst_str)); | |
1626 | pim_inet4_dump("<group?>", group_addr, group_str, | |
1627 | sizeof(group_str)); | |
1628 | zlog_debug( | |
1629 | "Send IGMPv3 query to %s on %s for group %s, sources=%d msg_size=%zd s_flag=%x QRV=%u QQI=%u QQIC=%02x", | |
1630 | dst_str, ifname, group_str, num_sources, msg_size, | |
1631 | s_flag, querier_robustness_variable, | |
1632 | querier_query_interval, qqic); | |
1633 | } | |
1634 | ||
1635 | memset(&to, 0, sizeof(to)); | |
1636 | to.sin_family = AF_INET; | |
1637 | to.sin_addr = dst_addr; | |
1638 | tolen = sizeof(to); | |
1639 | ||
1640 | sent = sendto(fd, query_buf, msg_size, MSG_DONTWAIT, | |
1641 | (struct sockaddr *)&to, tolen); | |
1642 | if (sent != (ssize_t)msg_size) { | |
1643 | char dst_str[INET_ADDRSTRLEN]; | |
1644 | char group_str[INET_ADDRSTRLEN]; | |
1645 | pim_inet4_dump("<dst?>", dst_addr, dst_str, sizeof(dst_str)); | |
1646 | pim_inet4_dump("<group?>", group_addr, group_str, | |
1647 | sizeof(group_str)); | |
1648 | if (sent < 0) { | |
1649 | zlog_warn( | |
1650 | "Send IGMPv3 query failed due to %s on %s: group=%s msg_size=%zd: errno=%d: %s", | |
1651 | dst_str, ifname, group_str, msg_size, errno, | |
1652 | safe_strerror(errno)); | |
1653 | } else { | |
1654 | zlog_warn( | |
1655 | "Send IGMPv3 query failed due to %s on %s: group=%s msg_size=%zd: sent=%zd", | |
1656 | dst_str, ifname, group_str, msg_size, sent); | |
1657 | } | |
1658 | return; | |
1659 | } | |
1660 | ||
1661 | /* | |
1662 | s_flag sanity test: s_flag must be set for general queries | |
1663 | ||
1664 | RFC 3376: 6.6.1. Timer Updates | |
1665 | ||
1666 | When a router sends or receives a query with a clear Suppress | |
1667 | Router-Side Processing flag, it must update its timers to reflect | |
1668 | the correct timeout values for the group or sources being queried. | |
1669 | ||
1670 | General queries don't trigger timer update. | |
1671 | */ | |
1672 | if (!s_flag) { | |
1673 | /* general query? */ | |
3ca68c9c | 1674 | if (group_addr.s_addr == INADDR_ANY) { |
d62a17ae | 1675 | char dst_str[INET_ADDRSTRLEN]; |
1676 | char group_str[INET_ADDRSTRLEN]; | |
1677 | pim_inet4_dump("<dst?>", dst_addr, dst_str, | |
1678 | sizeof(dst_str)); | |
1679 | pim_inet4_dump("<group?>", group_addr, group_str, | |
1680 | sizeof(group_str)); | |
1681 | zlog_warn( | |
1682 | "%s: to %s on %s: group=%s sources=%d: s_flag is clear for general query!", | |
15569c58 | 1683 | __func__, dst_str, ifname, group_str, |
d62a17ae | 1684 | num_sources); |
1685 | } | |
1686 | } | |
b05b72e8 DW |
1687 | } |
1688 | ||
c5f76fad | 1689 | void igmp_v3_recv_query(struct gm_sock *igmp, const char *from_str, |
d62a17ae | 1690 | char *igmp_msg) |
b05b72e8 | 1691 | { |
d62a17ae | 1692 | struct interface *ifp; |
1693 | struct pim_interface *pim_ifp; | |
1694 | struct in_addr group_addr; | |
1695 | uint8_t resv_s_qrv = 0; | |
1696 | uint8_t s_flag = 0; | |
1697 | uint8_t qrv = 0; | |
1698 | int i; | |
1699 | ||
1700 | memcpy(&group_addr, igmp_msg + 4, sizeof(struct in_addr)); | |
1701 | ifp = igmp->interface; | |
1702 | pim_ifp = ifp->info; | |
1703 | ||
1704 | /* | |
1705 | * RFC 3376: 4.1.6. QRV (Querier's Robustness Variable) | |
1706 | * | |
1707 | * Routers adopt the QRV value from the most recently received Query | |
1708 | * as their own [Robustness Variable] value, unless that most | |
1709 | * recently received QRV was zero, in which case the receivers use | |
1710 | * the default [Robustness Variable] value specified in section 8.1 | |
1711 | * or a statically configured value. | |
1712 | */ | |
1713 | resv_s_qrv = igmp_msg[8]; | |
1714 | qrv = 7 & resv_s_qrv; | |
1715 | igmp->querier_robustness_variable = | |
18adcff1 | 1716 | qrv ? qrv : pim_ifp->gm_default_robustness_variable; |
d62a17ae | 1717 | |
1718 | /* | |
1719 | * RFC 3376: 4.1.7. QQIC (Querier's Query Interval Code) | |
1720 | * | |
1721 | * Multicast routers that are not the current querier adopt the QQI | |
1722 | * value from the most recently received Query as their own [Query | |
1723 | * Interval] value, unless that most recently received QQI was zero, | |
1724 | * in which case the receiving routers use the default. | |
1725 | */ | |
1726 | if (igmp->t_other_querier_timer) { | |
1727 | /* other querier present */ | |
1728 | uint8_t qqic; | |
1729 | uint16_t qqi; | |
1730 | qqic = igmp_msg[9]; | |
1731 | qqi = igmp_msg_decode8to16(qqic); | |
1732 | igmp->querier_query_interval = | |
18adcff1 | 1733 | qqi ? qqi : pim_ifp->gm_default_query_interval; |
d62a17ae | 1734 | |
1735 | if (PIM_DEBUG_IGMP_TRACE) { | |
1736 | char ifaddr_str[INET_ADDRSTRLEN]; | |
1737 | pim_inet4_dump("<ifaddr?>", igmp->ifaddr, ifaddr_str, | |
1738 | sizeof(ifaddr_str)); | |
1739 | zlog_debug( | |
1740 | "Querier %s new query interval is %s QQI=%u sec (recv QQIC=%02x from %s)", | |
1741 | ifaddr_str, | |
1742 | qqi ? "recv-non-default" : "default", | |
1743 | igmp->querier_query_interval, qqic, from_str); | |
1744 | } | |
1745 | } | |
1746 | ||
1747 | /* | |
1748 | * RFC 3376: 6.6.1. Timer Updates | |
1749 | * | |
1750 | * When a router sends or receives a query with a clear Suppress | |
1751 | * Router-Side Processing flag, it must update its timers to reflect | |
1752 | * the correct timeout values for the group or sources being queried. | |
1753 | * | |
1754 | * General queries don't trigger timer update. | |
1755 | */ | |
1756 | s_flag = (1 << 3) & resv_s_qrv; | |
1757 | ||
1758 | if (!s_flag) { | |
1759 | /* s_flag is clear */ | |
1760 | ||
3ca68c9c | 1761 | if (group_addr.s_addr == INADDR_ANY) { |
d62a17ae | 1762 | /* this is a general query */ |
1763 | /* log that general query should have the s_flag set */ | |
1764 | zlog_warn( | |
1765 | "General IGMP query v3 from %s on %s: Suppress Router-Side Processing flag is clear", | |
1766 | from_str, ifp->name); | |
1767 | } else { | |
a16db099 | 1768 | struct gm_group *group; |
d62a17ae | 1769 | |
1770 | /* this is a non-general query: perform timer updates */ | |
1771 | ||
1772 | group = find_group_by_addr(igmp, group_addr); | |
1773 | if (group) { | |
1774 | int recv_num_sources = ntohs(*( | |
1775 | uint16_t | |
1776 | *)(igmp_msg | |
1777 | + IGMP_V3_NUMSOURCES_OFFSET)); | |
1778 | ||
1779 | /* | |
1780 | * RFC 3376: 6.6.1. Timer Updates | |
1781 | * Query Q(G,A): Source Timer for sources in A | |
1782 | * are lowered to LMQT | |
1783 | * Query Q(G): Group Timer is lowered to LMQT | |
1784 | */ | |
1785 | if (recv_num_sources < 1) { | |
1786 | /* Query Q(G): Group Timer is lowered to | |
1787 | * LMQT */ | |
1788 | ||
1789 | igmp_group_timer_lower_to_lmqt(group); | |
1790 | } else { | |
1791 | /* Query Q(G,A): Source Timer for | |
1792 | * sources in A are lowered to LMQT */ | |
1793 | ||
1794 | /* Scan sources in query and lower their | |
1795 | * timers to LMQT */ | |
1796 | struct in_addr *sources = | |
1797 | (struct in_addr | |
1798 | *)(igmp_msg | |
1799 | + IGMP_V3_SOURCES_OFFSET); | |
1800 | for (i = 0; i < recv_num_sources; ++i) { | |
1801 | struct in_addr src_addr; | |
51700107 | 1802 | struct gm_source *src; |
d62a17ae | 1803 | memcpy(&src_addr, sources + i, |
1804 | sizeof(struct in_addr)); | |
1805 | src = igmp_find_source_by_addr( | |
1806 | group, src_addr); | |
1807 | if (src) { | |
1808 | igmp_source_timer_lower_to_lmqt( | |
1809 | src); | |
1810 | } | |
1811 | } | |
1812 | } | |
1813 | } else { | |
1814 | char group_str[INET_ADDRSTRLEN]; | |
1815 | pim_inet4_dump("<group?>", group_addr, | |
1816 | group_str, sizeof(group_str)); | |
1817 | zlog_warn( | |
1818 | "IGMP query v3 from %s on %s: could not find group %s for timer update", | |
1819 | from_str, ifp->name, group_str); | |
1820 | } | |
1821 | } | |
1822 | } /* s_flag is clear: timer updates */ | |
b05b72e8 DW |
1823 | } |
1824 | ||
c5f76fad | 1825 | int igmp_v3_recv_report(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 1826 | const char *from_str, char *igmp_msg, int igmp_msg_len) |
b05b72e8 | 1827 | { |
d62a17ae | 1828 | int num_groups; |
1829 | uint8_t *group_record; | |
1830 | uint8_t *report_pastend = (uint8_t *)igmp_msg + igmp_msg_len; | |
1831 | struct interface *ifp = igmp->interface; | |
1832 | int i; | |
1833 | int local_ncb = 0; | |
b0f525a8 QY |
1834 | struct pim_interface *pim_ifp; |
1835 | ||
f83f3966 MS |
1836 | if (igmp->mtrace_only) |
1837 | return 0; | |
1838 | ||
b0f525a8 | 1839 | pim_ifp = igmp->interface->info; |
d62a17ae | 1840 | |
1841 | if (igmp_msg_len < IGMP_V3_MSG_MIN_SIZE) { | |
1842 | zlog_warn( | |
1843 | "Recv IGMP report v3 from %s on %s: size=%d shorter than minimum=%d", | |
1844 | from_str, ifp->name, igmp_msg_len, | |
1845 | IGMP_V3_MSG_MIN_SIZE); | |
1846 | return -1; | |
1847 | } | |
1848 | ||
9041c30a | 1849 | if (igmp_validate_checksum(igmp_msg, igmp_msg_len) == -1) { |
d62a17ae | 1850 | zlog_warn( |
9041c30a MR |
1851 | "Recv IGMPv3 report from %s on %s with invalid checksum", |
1852 | from_str, ifp->name); | |
d62a17ae | 1853 | return -1; |
1854 | } | |
1855 | ||
21313cbf | 1856 | /* Collecting IGMP Rx stats */ |
f2058cb4 | 1857 | igmp->igmp_stats.report_v3++; |
21313cbf | 1858 | |
d62a17ae | 1859 | num_groups = ntohs( |
1860 | *(uint16_t *)(igmp_msg + IGMP_V3_REPORT_NUMGROUPS_OFFSET)); | |
1861 | if (num_groups < 1) { | |
1862 | zlog_warn( | |
1863 | "Recv IGMP report v3 from %s on %s: missing group records", | |
1864 | from_str, ifp->name); | |
1865 | return -1; | |
1866 | } | |
1867 | ||
1868 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1869 | zlog_debug( | |
9041c30a MR |
1870 | "Recv IGMP report v3 from %s on %s: size=%d groups=%d", |
1871 | from_str, ifp->name, igmp_msg_len, num_groups); | |
d62a17ae | 1872 | } |
1873 | ||
1874 | group_record = (uint8_t *)igmp_msg + IGMP_V3_REPORT_GROUPPRECORD_OFFSET; | |
1875 | ||
1876 | /* Scan groups */ | |
1877 | for (i = 0; i < num_groups; ++i) { | |
1878 | struct in_addr rec_group; | |
1879 | uint8_t *sources; | |
1880 | uint8_t *src; | |
1881 | int rec_type; | |
1882 | int rec_auxdatalen; | |
1883 | int rec_num_sources; | |
1884 | int j; | |
1885 | struct prefix lncb; | |
1886 | struct prefix g; | |
b0f525a8 | 1887 | bool filtered = false; |
d62a17ae | 1888 | |
1889 | if ((group_record + IGMP_V3_GROUP_RECORD_MIN_SIZE) | |
1890 | > report_pastend) { | |
1891 | zlog_warn( | |
1892 | "Recv IGMP report v3 from %s on %s: group record beyond report end", | |
1893 | from_str, ifp->name); | |
1894 | return -1; | |
1895 | } | |
1896 | ||
1897 | rec_type = group_record[IGMP_V3_GROUP_RECORD_TYPE_OFFSET]; | |
1898 | rec_auxdatalen = | |
1899 | group_record[IGMP_V3_GROUP_RECORD_AUXDATALEN_OFFSET]; | |
1900 | rec_num_sources = ntohs(*( | |
1901 | uint16_t *)(group_record | |
1902 | + IGMP_V3_GROUP_RECORD_NUMSOURCES_OFFSET)); | |
1903 | ||
1904 | memcpy(&rec_group, | |
1905 | group_record + IGMP_V3_GROUP_RECORD_GROUP_OFFSET, | |
1906 | sizeof(struct in_addr)); | |
1907 | ||
1908 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1909 | zlog_debug( | |
ee2bbf7c | 1910 | " Recv IGMP report v3 from %s on %s: record=%d type=%d auxdatalen=%d sources=%d group=%pI4", |
d62a17ae | 1911 | from_str, ifp->name, i, rec_type, |
1912 | rec_auxdatalen, rec_num_sources, | |
ee2bbf7c | 1913 | &rec_group); |
d62a17ae | 1914 | } |
1915 | ||
1916 | /* Scan sources */ | |
1917 | ||
1918 | sources = group_record + IGMP_V3_GROUP_RECORD_SOURCE_OFFSET; | |
1919 | ||
1920 | for (j = 0, src = sources; j < rec_num_sources; ++j, src += 4) { | |
1921 | ||
1922 | if ((src + 4) > report_pastend) { | |
1923 | zlog_warn( | |
1924 | "Recv IGMP report v3 from %s on %s: group source beyond report end", | |
1925 | from_str, ifp->name); | |
1926 | return -1; | |
1927 | } | |
1928 | ||
1929 | if (PIM_DEBUG_IGMP_PACKETS) { | |
1930 | char src_str[200]; | |
1931 | ||
1932 | if (!inet_ntop(AF_INET, src, src_str, | |
1933 | sizeof(src_str))) | |
772270f3 QY |
1934 | snprintf(src_str, sizeof(src_str), |
1935 | "<source?>"); | |
d62a17ae | 1936 | |
1937 | zlog_debug( | |
ee2bbf7c | 1938 | " Recv IGMP report v3 from %s on %s: record=%d group=%pI4 source=%s", |
d62a17ae | 1939 | from_str, ifp->name, i, |
ee2bbf7c | 1940 | &rec_group, src_str); |
d62a17ae | 1941 | } |
1942 | } /* for (sources) */ | |
1943 | ||
1944 | ||
1945 | lncb.family = AF_INET; | |
1946 | lncb.u.prefix4.s_addr = 0x000000E0; | |
1947 | lncb.prefixlen = 24; | |
1948 | ||
1949 | g.family = AF_INET; | |
1950 | g.u.prefix4 = rec_group; | |
12256b84 | 1951 | g.prefixlen = IPV4_MAX_BITLEN; |
b0f525a8 QY |
1952 | |
1953 | /* determine filtering status for group */ | |
1954 | filtered = pim_is_group_filtered(ifp->info, &rec_group); | |
1955 | ||
1956 | if (PIM_DEBUG_IGMP_PACKETS && filtered) | |
1957 | zlog_debug( | |
ee2bbf7c MS |
1958 | "Filtering IGMPv3 group record %pI4 from %s on %s per prefix-list %s", |
1959 | &rec_group, from_str, ifp->name, | |
b0f525a8 QY |
1960 | pim_ifp->boundary_oil_plist); |
1961 | ||
d62a17ae | 1962 | /* |
1963 | * If we receive a igmp report with the group in 224.0.0.0/24 | |
1964 | * then we should ignore it | |
1965 | */ | |
1966 | if (prefix_match(&lncb, &g)) | |
1967 | local_ncb = 1; | |
1968 | ||
b0f525a8 | 1969 | if (!local_ncb && !filtered) |
d62a17ae | 1970 | switch (rec_type) { |
1971 | case IGMP_GRP_REC_TYPE_MODE_IS_INCLUDE: | |
1972 | igmpv3_report_isin(igmp, from, rec_group, | |
1973 | rec_num_sources, | |
1974 | (struct in_addr *)sources); | |
1975 | break; | |
1976 | case IGMP_GRP_REC_TYPE_MODE_IS_EXCLUDE: | |
1977 | igmpv3_report_isex( | |
1978 | igmp, from, rec_group, rec_num_sources, | |
1979 | (struct in_addr *)sources, 0); | |
1980 | break; | |
1981 | case IGMP_GRP_REC_TYPE_CHANGE_TO_INCLUDE_MODE: | |
1982 | igmpv3_report_toin(igmp, from, rec_group, | |
1983 | rec_num_sources, | |
1984 | (struct in_addr *)sources); | |
1985 | break; | |
1986 | case IGMP_GRP_REC_TYPE_CHANGE_TO_EXCLUDE_MODE: | |
1987 | igmpv3_report_toex(igmp, from, rec_group, | |
1988 | rec_num_sources, | |
1989 | (struct in_addr *)sources); | |
1990 | break; | |
1991 | case IGMP_GRP_REC_TYPE_ALLOW_NEW_SOURCES: | |
1992 | igmpv3_report_allow(igmp, from, rec_group, | |
1993 | rec_num_sources, | |
1994 | (struct in_addr *)sources); | |
1995 | break; | |
1996 | case IGMP_GRP_REC_TYPE_BLOCK_OLD_SOURCES: | |
1997 | igmpv3_report_block(igmp, from, rec_group, | |
1998 | rec_num_sources, | |
1999 | (struct in_addr *)sources); | |
2000 | break; | |
2001 | default: | |
2002 | zlog_warn( | |
2003 | "Recv IGMP report v3 from %s on %s: unknown record type: type=%d", | |
2004 | from_str, ifp->name, rec_type); | |
2005 | } | |
2006 | ||
2007 | group_record += | |
2008 | 8 + (rec_num_sources << 2) + (rec_auxdatalen << 2); | |
2009 | local_ncb = 0; | |
2010 | ||
2011 | } /* for (group records) */ | |
2012 | ||
2013 | return 0; | |
12e41d03 | 2014 | } |