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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 | ||
22 | #include "memory.h" | |
74fb6c66 | 23 | #include "prefix.h" |
9df99407 | 24 | #include "if.h" |
6345a326 DS |
25 | #include "hash.h" |
26 | #include "jhash.h" | |
3613d898 | 27 | #include "lib_errors.h" |
12e41d03 DL |
28 | |
29 | #include "pimd.h" | |
30 | #include "pim_igmp.h" | |
b05b72e8 | 31 | #include "pim_igmpv2.h" |
12e41d03 | 32 | #include "pim_igmpv3.h" |
4d9ad5dc | 33 | #include "pim_igmp_mtrace.h" |
12e41d03 DL |
34 | #include "pim_iface.h" |
35 | #include "pim_sock.h" | |
36 | #include "pim_mroute.h" | |
37 | #include "pim_str.h" | |
38 | #include "pim_util.h" | |
39 | #include "pim_time.h" | |
cd6d2858 DL |
40 | #include "pim_ssm.h" |
41 | #include "pim_tib.h" | |
12e41d03 | 42 | |
a16db099 | 43 | static void group_timer_off(struct gm_group *group); |
cc9f21da | 44 | static void pim_igmp_general_query(struct thread *t); |
12e41d03 | 45 | |
cd6d2858 DL |
46 | void igmp_anysource_forward_start(struct pim_instance *pim, |
47 | struct gm_group *group) | |
48 | { | |
49 | struct gm_source *source; | |
50 | struct in_addr src_addr = {.s_addr = 0}; | |
51 | /* Any source (*,G) is forwarded only if mode is EXCLUDE {empty} */ | |
52 | assert(group->group_filtermode_isexcl); | |
53 | assert(listcount(group->group_source_list) < 1); | |
54 | ||
55 | source = igmp_get_source_by_addr(group, src_addr, NULL); | |
56 | if (!source) { | |
57 | zlog_warn("%s: Failure to create * source", __func__); | |
58 | return; | |
59 | } | |
60 | ||
61 | igmp_source_forward_start(pim, source); | |
62 | } | |
63 | ||
64 | void igmp_anysource_forward_stop(struct gm_group *group) | |
65 | { | |
66 | struct gm_source *source; | |
67 | struct in_addr star = {.s_addr = 0}; | |
68 | ||
69 | source = igmp_find_source_by_addr(group, star); | |
70 | if (source) | |
71 | igmp_source_forward_stop(source); | |
72 | } | |
73 | ||
74 | static void igmp_source_forward_reevaluate_one(struct pim_instance *pim, | |
75 | struct gm_source *source) | |
76 | { | |
77 | pim_sgaddr sg; | |
78 | struct gm_group *group = source->source_group; | |
79 | struct pim_ifchannel *ch; | |
80 | ||
81 | if ((source->source_addr.s_addr != INADDR_ANY) || | |
82 | !IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) | |
83 | return; | |
84 | ||
85 | memset(&sg, 0, sizeof(sg)); | |
86 | sg.src = source->source_addr; | |
87 | sg.grp = group->group_addr; | |
88 | ||
89 | ch = pim_ifchannel_find(group->interface, &sg); | |
90 | if (pim_is_grp_ssm(pim, group->group_addr)) { | |
91 | /* If SSM group withdraw local membership */ | |
92 | if (ch && | |
93 | (ch->local_ifmembership == PIM_IFMEMBERSHIP_INCLUDE)) { | |
94 | if (PIM_DEBUG_PIM_EVENTS) | |
95 | zlog_debug( | |
96 | "local membership del for %pSG as G is now SSM", | |
97 | &sg); | |
98 | pim_ifchannel_local_membership_del(group->interface, | |
99 | &sg); | |
100 | } | |
101 | } else { | |
102 | /* If ASM group add local membership */ | |
103 | if (!ch || | |
104 | (ch->local_ifmembership == PIM_IFMEMBERSHIP_NOINFO)) { | |
105 | if (PIM_DEBUG_PIM_EVENTS) | |
106 | zlog_debug( | |
107 | "local membership add for %pSG as G is now ASM", | |
108 | &sg); | |
109 | pim_ifchannel_local_membership_add( | |
110 | group->interface, &sg, false /*is_vxlan*/); | |
111 | } | |
112 | } | |
113 | } | |
114 | ||
115 | void igmp_source_forward_reevaluate_all(struct pim_instance *pim) | |
116 | { | |
117 | struct interface *ifp; | |
118 | ||
119 | FOR_ALL_INTERFACES (pim->vrf, ifp) { | |
120 | struct pim_interface *pim_ifp = ifp->info; | |
121 | struct listnode *grpnode; | |
122 | struct gm_group *grp; | |
123 | struct pim_ifchannel *ch, *ch_temp; | |
124 | ||
125 | if (!pim_ifp) | |
126 | continue; | |
127 | ||
128 | /* scan igmp groups */ | |
129 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->gm_group_list, grpnode, | |
130 | grp)) { | |
131 | struct listnode *srcnode; | |
132 | struct gm_source *src; | |
133 | ||
134 | /* scan group sources */ | |
135 | for (ALL_LIST_ELEMENTS_RO(grp->group_source_list, | |
136 | srcnode, src)) { | |
137 | igmp_source_forward_reevaluate_one(pim, src); | |
138 | } /* scan group sources */ | |
139 | } /* scan igmp groups */ | |
140 | ||
141 | RB_FOREACH_SAFE (ch, pim_ifchannel_rb, &pim_ifp->ifchannel_rb, | |
142 | ch_temp) { | |
143 | if (pim_is_grp_ssm(pim, ch->sg.grp)) { | |
144 | if (pim_addr_is_any(ch->sg.src)) | |
145 | pim_ifchannel_delete(ch); | |
146 | } | |
147 | } | |
148 | } /* scan interfaces */ | |
149 | } | |
150 | ||
151 | void igmp_source_forward_start(struct pim_instance *pim, | |
152 | struct gm_source *source) | |
153 | { | |
154 | struct gm_group *group; | |
155 | pim_sgaddr sg; | |
156 | ||
157 | memset(&sg, 0, sizeof(sg)); | |
158 | sg.src = source->source_addr; | |
159 | sg.grp = source->source_group->group_addr; | |
160 | ||
161 | if (PIM_DEBUG_IGMP_TRACE) { | |
162 | zlog_debug("%s: (S,G)=%pSG oif=%s fwd=%d", __func__, &sg, | |
163 | source->source_group->interface->name, | |
164 | IGMP_SOURCE_TEST_FORWARDING(source->source_flags)); | |
165 | } | |
166 | ||
167 | /* Prevent IGMP interface from installing multicast route multiple | |
168 | times */ | |
169 | if (IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
170 | return; | |
171 | } | |
172 | ||
173 | group = source->source_group; | |
174 | ||
175 | if (tib_sg_gm_join(pim, sg, group->interface, | |
176 | &source->source_channel_oil)) | |
177 | IGMP_SOURCE_DO_FORWARDING(source->source_flags); | |
178 | } | |
179 | ||
180 | /* | |
181 | igmp_source_forward_stop: stop fowarding, but keep the source | |
182 | igmp_source_delete: stop fowarding, and delete the source | |
183 | */ | |
184 | void igmp_source_forward_stop(struct gm_source *source) | |
185 | { | |
186 | struct pim_interface *pim_oif; | |
187 | struct gm_group *group; | |
188 | pim_sgaddr sg; | |
189 | ||
190 | memset(&sg, 0, sizeof(sg)); | |
191 | sg.src = source->source_addr; | |
192 | sg.grp = source->source_group->group_addr; | |
193 | ||
194 | if (PIM_DEBUG_IGMP_TRACE) { | |
195 | zlog_debug("%s: (S,G)=%pSG oif=%s fwd=%d", __func__, &sg, | |
196 | source->source_group->interface->name, | |
197 | IGMP_SOURCE_TEST_FORWARDING(source->source_flags)); | |
198 | } | |
199 | ||
200 | /* Prevent IGMP interface from removing multicast route multiple | |
201 | times */ | |
202 | if (!IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
203 | return; | |
204 | } | |
205 | ||
206 | group = source->source_group; | |
207 | pim_oif = group->interface->info; | |
208 | ||
209 | tib_sg_gm_prune(pim_oif->pim, sg, group->interface, | |
210 | &source->source_channel_oil); | |
211 | IGMP_SOURCE_DONT_FORWARDING(source->source_flags); | |
212 | } | |
213 | ||
b05b72e8 DW |
214 | /* This socket is used for TXing IGMP packets only, IGMP RX happens |
215 | * in pim_mroute_msg() | |
216 | */ | |
d62a17ae | 217 | static int igmp_sock_open(struct in_addr ifaddr, struct interface *ifp, |
218 | uint32_t pim_options) | |
12e41d03 | 219 | { |
d62a17ae | 220 | int fd; |
221 | int join = 0; | |
222 | struct in_addr group; | |
223 | ||
224 | fd = pim_socket_mcast(IPPROTO_IGMP, ifaddr, ifp, 1); | |
225 | ||
226 | if (fd < 0) | |
227 | return -1; | |
228 | ||
229 | if (PIM_IF_TEST_IGMP_LISTEN_ALLROUTERS(pim_options)) { | |
230 | if (inet_aton(PIM_ALL_ROUTERS, &group)) { | |
231 | if (!pim_socket_join(fd, group, ifaddr, ifp->ifindex)) | |
232 | ++join; | |
233 | } else { | |
234 | zlog_warn( | |
ee2bbf7c MS |
235 | "%s %s: IGMP socket fd=%d interface %pI4: could not solve %s to group address: errno=%d: %s", |
236 | __FILE__, __func__, fd, &ifaddr, | |
15569c58 | 237 | PIM_ALL_ROUTERS, errno, safe_strerror(errno)); |
d62a17ae | 238 | } |
239 | } | |
240 | ||
241 | /* | |
242 | IGMP routers periodically send IGMP general queries to | |
243 | AllSystems=224.0.0.1 | |
244 | IGMP routers must receive general queries for querier election. | |
245 | */ | |
246 | if (inet_aton(PIM_ALL_SYSTEMS, &group)) { | |
247 | if (!pim_socket_join(fd, group, ifaddr, ifp->ifindex)) | |
248 | ++join; | |
249 | } else { | |
250 | zlog_warn( | |
ee2bbf7c MS |
251 | "%s %s: IGMP socket fd=%d interface %pI4: could not solve %s to group address: errno=%d: %s", |
252 | __FILE__, __func__, fd, &ifaddr, | |
d62a17ae | 253 | PIM_ALL_SYSTEMS, errno, safe_strerror(errno)); |
254 | } | |
255 | ||
256 | if (inet_aton(PIM_ALL_IGMP_ROUTERS, &group)) { | |
257 | if (!pim_socket_join(fd, group, ifaddr, ifp->ifindex)) { | |
258 | ++join; | |
259 | } | |
260 | } else { | |
261 | zlog_warn( | |
ee2bbf7c MS |
262 | "%s %s: IGMP socket fd=%d interface %pI4: could not solve %s to group address: errno=%d: %s", |
263 | __FILE__, __func__, fd, &ifaddr, | |
d62a17ae | 264 | PIM_ALL_IGMP_ROUTERS, errno, safe_strerror(errno)); |
265 | } | |
266 | ||
267 | if (!join) { | |
09c866e3 | 268 | flog_err_sys( |
450971aa | 269 | EC_LIB_SOCKET, |
ee2bbf7c MS |
270 | "IGMP socket fd=%d could not join any group on interface address %pI4", |
271 | fd, &ifaddr); | |
d62a17ae | 272 | close(fd); |
273 | fd = -1; | |
274 | } | |
275 | ||
276 | return fd; | |
12e41d03 DL |
277 | } |
278 | ||
279 | #undef IGMP_SOCK_DUMP | |
280 | ||
281 | #ifdef IGMP_SOCK_DUMP | |
282 | static void igmp_sock_dump(array_t *igmp_sock_array) | |
283 | { | |
d62a17ae | 284 | int size = array_size(igmp_sock_array); |
285 | for (int i = 0; i < size; ++i) { | |
286 | ||
c5f76fad | 287 | struct gm_sock *igmp = array_get(igmp_sock_array, i); |
d62a17ae | 288 | |
ee2bbf7c MS |
289 | zlog_debug("%s %s: [%d/%d] igmp_addr=%pI4 fd=%d", __FILE__, |
290 | __func__, i, size, &igmp->ifaddr, | |
15569c58 | 291 | igmp->fd); |
d62a17ae | 292 | } |
12e41d03 DL |
293 | } |
294 | #endif | |
295 | ||
c5f76fad SG |
296 | struct gm_sock *pim_igmp_sock_lookup_ifaddr(struct list *igmp_sock_list, |
297 | struct in_addr ifaddr) | |
12e41d03 | 298 | { |
d62a17ae | 299 | struct listnode *sock_node; |
c5f76fad | 300 | struct gm_sock *igmp; |
12e41d03 DL |
301 | |
302 | #ifdef IGMP_SOCK_DUMP | |
d62a17ae | 303 | igmp_sock_dump(igmp_sock_list); |
12e41d03 DL |
304 | #endif |
305 | ||
d62a17ae | 306 | for (ALL_LIST_ELEMENTS_RO(igmp_sock_list, sock_node, igmp)) |
307 | if (ifaddr.s_addr == igmp->ifaddr.s_addr) | |
308 | return igmp; | |
12e41d03 | 309 | |
d12f46fa | 310 | return NULL; |
12e41d03 DL |
311 | } |
312 | ||
cc9f21da | 313 | static void pim_igmp_other_querier_expire(struct thread *t) |
12e41d03 | 314 | { |
c5f76fad | 315 | struct gm_sock *igmp; |
d62a17ae | 316 | |
317 | igmp = THREAD_ARG(t); | |
318 | ||
df5dfb77 | 319 | assert(!igmp->t_igmp_query_timer); |
d62a17ae | 320 | |
321 | if (PIM_DEBUG_IGMP_TRACE) { | |
322 | char ifaddr_str[INET_ADDRSTRLEN]; | |
323 | pim_inet4_dump("<ifaddr?>", igmp->ifaddr, ifaddr_str, | |
324 | sizeof(ifaddr_str)); | |
15569c58 | 325 | zlog_debug("%s: Querier %s resuming", __func__, ifaddr_str); |
d62a17ae | 326 | } |
9a7cee26 | 327 | /* Mark the interface address as querier address */ |
328 | igmp->querier_addr = igmp->ifaddr; | |
d62a17ae | 329 | |
330 | /* | |
331 | We are the current querier, then | |
332 | re-start sending general queries. | |
333 | RFC 2236 - sec 7 Other Querier | |
334 | present timer expired (Send General | |
335 | Query, Set Gen. Query. timer) | |
336 | */ | |
337 | pim_igmp_general_query(t); | |
12e41d03 DL |
338 | } |
339 | ||
c5f76fad | 340 | void pim_igmp_other_querier_timer_on(struct gm_sock *igmp) |
12e41d03 | 341 | { |
d62a17ae | 342 | long other_querier_present_interval_msec; |
343 | struct pim_interface *pim_ifp; | |
344 | ||
df5dfb77 DL |
345 | assert(igmp); |
346 | assert(igmp->interface); | |
347 | assert(igmp->interface->info); | |
d62a17ae | 348 | |
349 | pim_ifp = igmp->interface->info; | |
350 | ||
351 | if (igmp->t_other_querier_timer) { | |
352 | /* | |
353 | There is other querier present already, | |
354 | then reset the other-querier-present timer. | |
355 | */ | |
356 | ||
357 | if (PIM_DEBUG_IGMP_TRACE) { | |
358 | char ifaddr_str[INET_ADDRSTRLEN]; | |
359 | pim_inet4_dump("<ifaddr?>", igmp->ifaddr, ifaddr_str, | |
360 | sizeof(ifaddr_str)); | |
361 | zlog_debug( | |
362 | "Querier %s resetting TIMER event for Other-Querier-Present", | |
363 | ifaddr_str); | |
364 | } | |
365 | THREAD_OFF(igmp->t_other_querier_timer); | |
366 | } else { | |
367 | /* | |
368 | We are the current querier, then stop sending general queries: | |
369 | igmp->t_igmp_query_timer = NULL; | |
370 | */ | |
371 | pim_igmp_general_query_off(igmp); | |
372 | } | |
373 | ||
374 | /* | |
375 | Since this socket is starting the other-querier-present timer, | |
376 | there should not be periodic query timer for this socket. | |
377 | */ | |
df5dfb77 | 378 | assert(!igmp->t_igmp_query_timer); |
d62a17ae | 379 | |
380 | /* | |
381 | RFC 3376: 8.5. Other Querier Present Interval | |
382 | ||
383 | The Other Querier Present Interval is the length of time that must | |
384 | pass before a multicast router decides that there is no longer | |
385 | another multicast router which should be the querier. This value | |
386 | MUST be ((the Robustness Variable) times (the Query Interval)) plus | |
387 | (one half of one Query Response Interval). | |
388 | ||
389 | other_querier_present_interval_msec = \ | |
390 | igmp->querier_robustness_variable * \ | |
391 | 1000 * igmp->querier_query_interval + \ | |
392 | 100 * (pim_ifp->query_max_response_time_dsec >> 1); | |
393 | */ | |
394 | other_querier_present_interval_msec = PIM_IGMP_OQPI_MSEC( | |
395 | igmp->querier_robustness_variable, igmp->querier_query_interval, | |
18adcff1 | 396 | pim_ifp->gm_query_max_response_time_dsec); |
d62a17ae | 397 | |
398 | if (PIM_DEBUG_IGMP_TRACE) { | |
399 | char ifaddr_str[INET_ADDRSTRLEN]; | |
400 | pim_inet4_dump("<ifaddr?>", igmp->ifaddr, ifaddr_str, | |
401 | sizeof(ifaddr_str)); | |
402 | zlog_debug( | |
403 | "Querier %s scheduling %ld.%03ld sec TIMER event for Other-Querier-Present", | |
404 | ifaddr_str, other_querier_present_interval_msec / 1000, | |
405 | other_querier_present_interval_msec % 1000); | |
406 | } | |
407 | ||
36417fcc DS |
408 | thread_add_timer_msec(router->master, pim_igmp_other_querier_expire, |
409 | igmp, other_querier_present_interval_msec, | |
d62a17ae | 410 | &igmp->t_other_querier_timer); |
12e41d03 DL |
411 | } |
412 | ||
c5f76fad | 413 | void pim_igmp_other_querier_timer_off(struct gm_sock *igmp) |
12e41d03 | 414 | { |
df5dfb77 | 415 | assert(igmp); |
d62a17ae | 416 | |
417 | if (PIM_DEBUG_IGMP_TRACE) { | |
418 | if (igmp->t_other_querier_timer) { | |
419 | char ifaddr_str[INET_ADDRSTRLEN]; | |
420 | pim_inet4_dump("<ifaddr?>", igmp->ifaddr, ifaddr_str, | |
421 | sizeof(ifaddr_str)); | |
422 | zlog_debug( | |
423 | "IGMP querier %s fd=%d cancelling other-querier-present TIMER event on %s", | |
424 | ifaddr_str, igmp->fd, igmp->interface->name); | |
425 | } | |
426 | } | |
427 | THREAD_OFF(igmp->t_other_querier_timer); | |
12e41d03 DL |
428 | } |
429 | ||
9041c30a MR |
430 | int igmp_validate_checksum(char *igmp_msg, int igmp_msg_len) |
431 | { | |
432 | uint16_t recv_checksum; | |
433 | uint16_t checksum; | |
434 | ||
435 | IGMP_GET_INT16((unsigned char *)(igmp_msg + IGMP_CHECKSUM_OFFSET), | |
436 | recv_checksum); | |
437 | ||
438 | /* Clear the checksum field */ | |
439 | memset(igmp_msg + IGMP_CHECKSUM_OFFSET, 0, 2); | |
440 | ||
441 | checksum = in_cksum(igmp_msg, igmp_msg_len); | |
442 | if (ntohs(checksum) != recv_checksum) { | |
443 | zlog_warn("Invalid checksum received %x, calculated %x", | |
444 | recv_checksum, ntohs(checksum)); | |
445 | return -1; | |
446 | } | |
447 | ||
448 | return 0; | |
449 | } | |
450 | ||
c5f76fad | 451 | static int igmp_recv_query(struct gm_sock *igmp, int query_version, |
d62a17ae | 452 | int max_resp_code, struct in_addr from, |
453 | const char *from_str, char *igmp_msg, | |
454 | int igmp_msg_len) | |
12e41d03 | 455 | { |
d62a17ae | 456 | struct interface *ifp; |
457 | struct pim_interface *pim_ifp; | |
458 | struct in_addr group_addr; | |
d62a17ae | 459 | |
f83f3966 MS |
460 | if (igmp->mtrace_only) |
461 | return 0; | |
462 | ||
d62a17ae | 463 | memcpy(&group_addr, igmp_msg + 4, sizeof(struct in_addr)); |
464 | ||
465 | ifp = igmp->interface; | |
466 | pim_ifp = ifp->info; | |
467 | ||
9041c30a | 468 | if (igmp_validate_checksum(igmp_msg, igmp_msg_len) == -1) { |
d62a17ae | 469 | zlog_warn( |
9041c30a MR |
470 | "Recv IGMP query v%d from %s on %s with invalid checksum", |
471 | query_version, from_str, ifp->name); | |
d62a17ae | 472 | return -1; |
473 | } | |
474 | ||
8890b440 DS |
475 | if (!pim_if_connected_to_source(ifp, from)) { |
476 | if (PIM_DEBUG_IGMP_PACKETS) | |
477 | zlog_debug("Recv IGMP query on interface: %s from a non-connected source: %s", | |
478 | ifp->name, from_str); | |
479 | return 0; | |
480 | } | |
481 | ||
096f7609 | 482 | if (if_address_is_local(&from, AF_INET, ifp->vrf->vrf_id)) { |
26a0f1e2 DS |
483 | if (PIM_DEBUG_IGMP_PACKETS) |
484 | zlog_debug("Recv IGMP query on interface: %s from ourself %s", | |
485 | ifp->name, from_str); | |
486 | return 0; | |
487 | } | |
488 | ||
21313cbf MS |
489 | /* Collecting IGMP Rx stats */ |
490 | switch (query_version) { | |
491 | case 1: | |
492 | igmp->rx_stats.query_v1++; | |
493 | break; | |
494 | case 2: | |
495 | igmp->rx_stats.query_v2++; | |
496 | break; | |
497 | case 3: | |
498 | igmp->rx_stats.query_v3++; | |
499 | break; | |
500 | default: | |
501 | igmp->rx_stats.unsupported++; | |
502 | } | |
503 | ||
b0f525a8 QY |
504 | /* |
505 | * RFC 3376 defines some guidelines on operating in backwards | |
506 | * compatibility with older versions of IGMP but there are some gaps in | |
507 | * the logic: | |
d62a17ae | 508 | * |
509 | * - once we drop from say version 3 to version 2 we will never go back | |
b0f525a8 QY |
510 | * to version 3 even if the node that TXed an IGMP v2 query upgrades |
511 | * to v3 | |
d62a17ae | 512 | * |
513 | * - The node with the lowest IP is the querier so we will only know to | |
b0f525a8 QY |
514 | * drop from v3 to v2 if the node that is the querier is also the one |
515 | * that is running igmp v2. If a non-querier only supports igmp v2 | |
516 | * we will have no way of knowing. | |
d62a17ae | 517 | * |
518 | * For now we will simplify things and inform the user that they need to | |
519 | * configure all PIM routers to use the same version of IGMP. | |
520 | */ | |
29e58225 | 521 | if (query_version != pim_ifp->igmp_version) { |
d62a17ae | 522 | zlog_warn( |
3efd0893 | 523 | "Recv IGMP query v%d from %s on %s but we are using v%d, please configure all PIM routers on this subnet to use the same IGMP version", |
29e58225 DL |
524 | query_version, from_str, ifp->name, |
525 | pim_ifp->igmp_version); | |
d62a17ae | 526 | return 0; |
527 | } | |
528 | ||
529 | if (PIM_DEBUG_IGMP_PACKETS) { | |
530 | char group_str[INET_ADDRSTRLEN]; | |
531 | pim_inet4_dump("<group?>", group_addr, group_str, | |
532 | sizeof(group_str)); | |
533 | zlog_debug("Recv IGMP query v%d from %s on %s for group %s", | |
534 | query_version, from_str, ifp->name, group_str); | |
535 | } | |
536 | ||
537 | /* | |
538 | RFC 3376: 6.6.2. Querier Election | |
539 | ||
540 | When a router receives a query with a lower IP address, it sets | |
541 | the Other-Querier-Present timer to Other Querier Present Interval | |
542 | and ceases to send queries on the network if it was the previously | |
543 | elected querier. | |
544 | */ | |
545 | if (ntohl(from.s_addr) < ntohl(igmp->ifaddr.s_addr)) { | |
546 | ||
5bc4a46b MR |
547 | /* As per RFC 2236 section 3: |
548 | * When a Querier receives a Leave Group message for a group | |
549 | * that has group members on the reception interface, it sends | |
550 | * [Last Member Query Count] Group-Specific Queries every [Last | |
551 | * Member Query Interval] to the group being left. These | |
552 | * Group-Specific Queries have their Max Response time set to | |
553 | * [Last Member Query Interval]. If no Reports are received | |
554 | * after the response time of the last query expires, the | |
555 | * routers assume that the group has no local members, as above. | |
556 | * Any Querier to non-Querier transition is ignored during this | |
557 | * time; the same router keeps sending the Group-Specific | |
558 | * Queries. | |
559 | */ | |
560 | struct gm_group *group; | |
561 | ||
562 | group = find_group_by_addr(igmp, group_addr); | |
563 | if (group && group->t_group_query_retransmit_timer) { | |
564 | if (PIM_DEBUG_IGMP_TRACE) | |
565 | zlog_debug( | |
566 | "%s: lower address query packet from %s is ignored when last member query interval timer is running", | |
567 | ifp->name, from_str); | |
568 | return 0; | |
569 | } | |
570 | ||
d62a17ae | 571 | if (PIM_DEBUG_IGMP_TRACE) { |
572 | char ifaddr_str[INET_ADDRSTRLEN]; | |
573 | pim_inet4_dump("<ifaddr?>", igmp->ifaddr, ifaddr_str, | |
574 | sizeof(ifaddr_str)); | |
575 | zlog_debug( | |
576 | "%s: local address %s (%u) lost querier election to %s (%u)", | |
577 | ifp->name, ifaddr_str, | |
578 | ntohl(igmp->ifaddr.s_addr), from_str, | |
579 | ntohl(from.s_addr)); | |
580 | } | |
9a7cee26 | 581 | if (ntohl(from.s_addr) < ntohl(igmp->querier_addr.s_addr)) |
582 | igmp->querier_addr.s_addr = from.s_addr; | |
d62a17ae | 583 | |
584 | pim_igmp_other_querier_timer_on(igmp); | |
585 | } | |
586 | ||
587 | /* IGMP version 3 is the only one where we process the RXed query */ | |
588 | if (query_version == 3) { | |
589 | igmp_v3_recv_query(igmp, from_str, igmp_msg); | |
590 | } | |
591 | ||
592 | return 0; | |
12e41d03 DL |
593 | } |
594 | ||
d62a17ae | 595 | static void on_trace(const char *label, struct interface *ifp, |
596 | struct in_addr from) | |
12e41d03 | 597 | { |
d62a17ae | 598 | if (PIM_DEBUG_IGMP_TRACE) { |
599 | char from_str[INET_ADDRSTRLEN]; | |
600 | pim_inet4_dump("<from?>", from, from_str, sizeof(from_str)); | |
601 | zlog_debug("%s: from %s on %s", label, from_str, ifp->name); | |
602 | } | |
12e41d03 DL |
603 | } |
604 | ||
c5f76fad | 605 | static int igmp_v1_recv_report(struct gm_sock *igmp, struct in_addr from, |
d62a17ae | 606 | const char *from_str, char *igmp_msg, |
607 | int igmp_msg_len) | |
12e41d03 | 608 | { |
d62a17ae | 609 | struct interface *ifp = igmp->interface; |
a16db099 | 610 | struct gm_group *group; |
d62a17ae | 611 | struct in_addr group_addr; |
12e41d03 | 612 | |
15569c58 | 613 | on_trace(__func__, igmp->interface, from); |
12e41d03 | 614 | |
f83f3966 MS |
615 | if (igmp->mtrace_only) |
616 | return 0; | |
617 | ||
d62a17ae | 618 | if (igmp_msg_len != IGMP_V12_MSG_SIZE) { |
619 | zlog_warn( | |
620 | "Recv IGMP report v1 from %s on %s: size=%d other than correct=%d", | |
621 | from_str, ifp->name, igmp_msg_len, IGMP_V12_MSG_SIZE); | |
622 | return -1; | |
623 | } | |
12e41d03 | 624 | |
9041c30a MR |
625 | if (igmp_validate_checksum(igmp_msg, igmp_msg_len) == -1) { |
626 | zlog_warn( | |
627 | "Recv IGMP report v1 from %s on %s with invalid checksum", | |
628 | from_str, ifp->name); | |
629 | return -1; | |
630 | } | |
631 | ||
21313cbf MS |
632 | /* Collecting IGMP Rx stats */ |
633 | igmp->rx_stats.report_v1++; | |
634 | ||
d62a17ae | 635 | if (PIM_DEBUG_IGMP_TRACE) { |
15569c58 | 636 | zlog_warn("%s %s: FIXME WRITEME", __FILE__, __func__); |
d62a17ae | 637 | } |
12e41d03 | 638 | |
d62a17ae | 639 | memcpy(&group_addr, igmp_msg + 4, sizeof(struct in_addr)); |
12e41d03 | 640 | |
b0f525a8 QY |
641 | if (pim_is_group_filtered(ifp->info, &group_addr)) |
642 | return -1; | |
643 | ||
d62a17ae | 644 | /* non-existant group is created as INCLUDE {empty} */ |
645 | group = igmp_add_group_by_addr(igmp, group_addr); | |
646 | if (!group) { | |
647 | return -1; | |
648 | } | |
12e41d03 | 649 | |
d62a17ae | 650 | group->last_igmp_v1_report_dsec = pim_time_monotonic_dsec(); |
12e41d03 | 651 | |
d62a17ae | 652 | return 0; |
12e41d03 DL |
653 | } |
654 | ||
88ea79ad | 655 | bool pim_igmp_verify_header(struct ip *ip_hdr, size_t len, size_t *hlen) |
ff4ad870 | 656 | { |
88ea79ad MR |
657 | char *igmp_msg; |
658 | int igmp_msg_len; | |
659 | int msg_type; | |
660 | size_t ip_hlen; /* ip header length in bytes */ | |
661 | ||
ff4ad870 MR |
662 | if (len < sizeof(*ip_hdr)) { |
663 | zlog_warn("IGMP packet size=%zu shorter than minimum=%zu", len, | |
664 | sizeof(*ip_hdr)); | |
665 | return false; | |
666 | } | |
667 | ||
88ea79ad MR |
668 | ip_hlen = ip_hdr->ip_hl << 2; /* ip_hl gives length in 4-byte words */ |
669 | *hlen = ip_hlen; | |
670 | ||
671 | if (ip_hlen > len) { | |
672 | zlog_warn( | |
673 | "IGMP packet header claims size %zu, but we only have %zu bytes", | |
674 | ip_hlen, len); | |
675 | return false; | |
676 | } | |
677 | ||
678 | igmp_msg = (char *)ip_hdr + ip_hlen; | |
679 | igmp_msg_len = len - ip_hlen; | |
680 | msg_type = *igmp_msg; | |
681 | ||
ff4ad870 MR |
682 | if (igmp_msg_len < PIM_IGMP_MIN_LEN) { |
683 | zlog_warn("IGMP message size=%d shorter than minimum=%d", | |
684 | igmp_msg_len, PIM_IGMP_MIN_LEN); | |
685 | return false; | |
686 | } | |
687 | ||
54d7bf0c MR |
688 | if ((msg_type != PIM_IGMP_MTRACE_RESPONSE) |
689 | && (msg_type != PIM_IGMP_MTRACE_QUERY_REQUEST)) { | |
690 | if (ip_hdr->ip_ttl != 1) { | |
691 | zlog_warn( | |
692 | "Recv IGMP packet with invalid ttl=%u, discarding the packet", | |
693 | ip_hdr->ip_ttl); | |
e748f180 | 694 | return false; |
54d7bf0c MR |
695 | } |
696 | } | |
697 | ||
ff4ad870 MR |
698 | return true; |
699 | } | |
700 | ||
c5f76fad | 701 | int pim_igmp_packet(struct gm_sock *igmp, char *buf, size_t len) |
12e41d03 | 702 | { |
88ea79ad | 703 | struct ip *ip_hdr = (struct ip *)buf; |
d62a17ae | 704 | size_t ip_hlen; /* ip header length in bytes */ |
705 | char *igmp_msg; | |
706 | int igmp_msg_len; | |
707 | int msg_type; | |
708 | char from_str[INET_ADDRSTRLEN]; | |
709 | char to_str[INET_ADDRSTRLEN]; | |
710 | ||
88ea79ad | 711 | if (!pim_igmp_verify_header(ip_hdr, len, &ip_hlen)) |
f08e6750 | 712 | return -1; |
f08e6750 | 713 | |
d62a17ae | 714 | igmp_msg = buf + ip_hlen; |
d62a17ae | 715 | igmp_msg_len = len - ip_hlen; |
f08e6750 QY |
716 | msg_type = *igmp_msg; |
717 | ||
ff4ad870 MR |
718 | pim_inet4_dump("<src?>", ip_hdr->ip_src, from_str, sizeof(from_str)); |
719 | pim_inet4_dump("<dst?>", ip_hdr->ip_dst, to_str, sizeof(to_str)); | |
720 | ||
d62a17ae | 721 | if (PIM_DEBUG_IGMP_PACKETS) { |
722 | zlog_debug( | |
c7e663d6 DS |
723 | "Recv IGMP packet from %s to %s on %s: size=%zu ttl=%d msg_type=%d msg_size=%d", |
724 | from_str, to_str, igmp->interface->name, len, ip_hdr->ip_ttl, | |
d62a17ae | 725 | msg_type, igmp_msg_len); |
726 | } | |
12e41d03 | 727 | |
d62a17ae | 728 | switch (msg_type) { |
729 | case PIM_IGMP_MEMBERSHIP_QUERY: { | |
730 | int max_resp_code = igmp_msg[1]; | |
731 | int query_version; | |
732 | ||
733 | /* | |
734 | RFC 3376: 7.1. Query Version Distinctions | |
735 | IGMPv1 Query: length = 8 octets AND Max Resp Code field is | |
736 | zero | |
737 | IGMPv2 Query: length = 8 octets AND Max Resp Code field is | |
738 | non-zero | |
739 | IGMPv3 Query: length >= 12 octets | |
740 | */ | |
741 | ||
742 | if (igmp_msg_len == 8) { | |
743 | query_version = max_resp_code ? 2 : 1; | |
744 | } else if (igmp_msg_len >= 12) { | |
745 | query_version = 3; | |
746 | } else { | |
747 | zlog_warn("Unknown IGMP query version"); | |
748 | return -1; | |
749 | } | |
750 | ||
751 | return igmp_recv_query(igmp, query_version, max_resp_code, | |
752 | ip_hdr->ip_src, from_str, igmp_msg, | |
753 | igmp_msg_len); | |
754 | } | |
12e41d03 | 755 | |
d62a17ae | 756 | case PIM_IGMP_V3_MEMBERSHIP_REPORT: |
757 | return igmp_v3_recv_report(igmp, ip_hdr->ip_src, from_str, | |
758 | igmp_msg, igmp_msg_len); | |
12e41d03 | 759 | |
d62a17ae | 760 | case PIM_IGMP_V2_MEMBERSHIP_REPORT: |
761 | return igmp_v2_recv_report(igmp, ip_hdr->ip_src, from_str, | |
762 | igmp_msg, igmp_msg_len); | |
12e41d03 | 763 | |
d62a17ae | 764 | case PIM_IGMP_V1_MEMBERSHIP_REPORT: |
765 | return igmp_v1_recv_report(igmp, ip_hdr->ip_src, from_str, | |
766 | igmp_msg, igmp_msg_len); | |
12e41d03 | 767 | |
d62a17ae | 768 | case PIM_IGMP_V2_LEAVE_GROUP: |
d1b61cb9 MR |
769 | return igmp_v2_recv_leave(igmp, ip_hdr, from_str, igmp_msg, |
770 | igmp_msg_len); | |
4d9ad5dc MS |
771 | |
772 | case PIM_IGMP_MTRACE_RESPONSE: | |
773 | return igmp_mtrace_recv_response(igmp, ip_hdr, ip_hdr->ip_src, | |
774 | from_str, igmp_msg, | |
775 | igmp_msg_len); | |
4d9ad5dc MS |
776 | case PIM_IGMP_MTRACE_QUERY_REQUEST: |
777 | return igmp_mtrace_recv_qry_req(igmp, ip_hdr, ip_hdr->ip_src, | |
778 | from_str, igmp_msg, | |
779 | igmp_msg_len); | |
d62a17ae | 780 | } |
12e41d03 | 781 | |
d62a17ae | 782 | zlog_warn("Ignoring unsupported IGMP message type: %d", msg_type); |
783 | ||
21313cbf MS |
784 | /* Collecting IGMP Rx stats */ |
785 | igmp->rx_stats.unsupported++; | |
786 | ||
d62a17ae | 787 | return -1; |
12e41d03 DL |
788 | } |
789 | ||
c5f76fad | 790 | void pim_igmp_general_query_on(struct gm_sock *igmp) |
12e41d03 | 791 | { |
d62a17ae | 792 | struct pim_interface *pim_ifp; |
793 | int startup_mode; | |
794 | int query_interval; | |
795 | ||
796 | /* | |
797 | Since this socket is starting as querier, | |
798 | there should not exist a timer for other-querier-present. | |
799 | */ | |
df5dfb77 | 800 | assert(!igmp->t_other_querier_timer); |
d62a17ae | 801 | pim_ifp = igmp->interface->info; |
df5dfb77 | 802 | assert(pim_ifp); |
d62a17ae | 803 | |
804 | /* | |
805 | RFC 3376: 8.6. Startup Query Interval | |
806 | ||
807 | The Startup Query Interval is the interval between General Queries | |
808 | sent by a Querier on startup. Default: 1/4 the Query Interval. | |
809 | The first one should be sent out immediately instead of 125/4 | |
810 | seconds from now. | |
811 | */ | |
812 | startup_mode = igmp->startup_query_count > 0; | |
813 | if (startup_mode) { | |
814 | /* | |
815 | * If this is the first time we are sending a query on a | |
816 | * newly configured igmp interface send it out in 1 second | |
817 | * just to give the entire world a tiny bit of time to settle | |
818 | * else the query interval is: | |
18adcff1 | 819 | * query_interval = pim_ifp->gm_default_query_interval >> 2; |
d62a17ae | 820 | */ |
18adcff1 SG |
821 | if (igmp->startup_query_count == |
822 | igmp->querier_robustness_variable) | |
d62a17ae | 823 | query_interval = 1; |
824 | else | |
29e58225 | 825 | query_interval = PIM_IGMP_SQI( |
18adcff1 | 826 | pim_ifp->gm_default_query_interval); |
d62a17ae | 827 | |
828 | --igmp->startup_query_count; | |
829 | } else { | |
830 | query_interval = igmp->querier_query_interval; | |
831 | } | |
832 | ||
833 | if (PIM_DEBUG_IGMP_TRACE) { | |
834 | char ifaddr_str[INET_ADDRSTRLEN]; | |
835 | pim_inet4_dump("<ifaddr?>", igmp->ifaddr, ifaddr_str, | |
836 | sizeof(ifaddr_str)); | |
837 | zlog_debug( | |
838 | "Querier %s scheduling %d-second (%s) TIMER event for IGMP query on fd=%d", | |
839 | ifaddr_str, query_interval, | |
840 | startup_mode ? "startup" : "non-startup", igmp->fd); | |
841 | } | |
36417fcc DS |
842 | thread_add_timer(router->master, pim_igmp_general_query, igmp, |
843 | query_interval, &igmp->t_igmp_query_timer); | |
12e41d03 DL |
844 | } |
845 | ||
c5f76fad | 846 | void pim_igmp_general_query_off(struct gm_sock *igmp) |
12e41d03 | 847 | { |
df5dfb77 | 848 | assert(igmp); |
d62a17ae | 849 | |
850 | if (PIM_DEBUG_IGMP_TRACE) { | |
851 | if (igmp->t_igmp_query_timer) { | |
852 | char ifaddr_str[INET_ADDRSTRLEN]; | |
853 | pim_inet4_dump("<ifaddr?>", igmp->ifaddr, ifaddr_str, | |
854 | sizeof(ifaddr_str)); | |
855 | zlog_debug( | |
856 | "IGMP querier %s fd=%d cancelling query TIMER event on %s", | |
857 | ifaddr_str, igmp->fd, igmp->interface->name); | |
858 | } | |
859 | } | |
860 | THREAD_OFF(igmp->t_igmp_query_timer); | |
12e41d03 DL |
861 | } |
862 | ||
863 | /* Issue IGMP general query */ | |
cc9f21da | 864 | static void pim_igmp_general_query(struct thread *t) |
12e41d03 | 865 | { |
c5f76fad | 866 | struct gm_sock *igmp; |
d62a17ae | 867 | struct in_addr dst_addr; |
868 | struct in_addr group_addr; | |
869 | struct pim_interface *pim_ifp; | |
870 | int query_buf_size; | |
871 | ||
872 | igmp = THREAD_ARG(t); | |
873 | ||
df5dfb77 DL |
874 | assert(igmp->interface); |
875 | assert(igmp->interface->info); | |
d62a17ae | 876 | |
877 | pim_ifp = igmp->interface->info; | |
878 | ||
29e58225 | 879 | if (pim_ifp->igmp_version == 3) { |
d62a17ae | 880 | query_buf_size = PIM_IGMP_BUFSIZE_WRITE; |
881 | } else { | |
882 | query_buf_size = IGMP_V12_MSG_SIZE; | |
883 | } | |
884 | ||
885 | char query_buf[query_buf_size]; | |
886 | ||
887 | /* | |
888 | RFC3376: 4.1.12. IP Destination Addresses for Queries | |
889 | ||
890 | In IGMPv3, General Queries are sent with an IP destination address | |
891 | of 224.0.0.1, the all-systems multicast address. Group-Specific | |
892 | and Group-and-Source-Specific Queries are sent with an IP | |
893 | destination address equal to the multicast address of interest. | |
894 | */ | |
895 | ||
896 | dst_addr.s_addr = htonl(INADDR_ALLHOSTS_GROUP); | |
897 | group_addr.s_addr = PIM_NET_INADDR_ANY; | |
898 | ||
899 | if (PIM_DEBUG_IGMP_TRACE) { | |
900 | char querier_str[INET_ADDRSTRLEN]; | |
901 | char dst_str[INET_ADDRSTRLEN]; | |
902 | pim_inet4_dump("<querier?>", igmp->ifaddr, querier_str, | |
903 | sizeof(querier_str)); | |
904 | pim_inet4_dump("<dst?>", dst_addr, dst_str, sizeof(dst_str)); | |
905 | zlog_debug("Querier %s issuing IGMP general query to %s on %s", | |
906 | querier_str, dst_str, igmp->interface->name); | |
907 | } | |
908 | ||
29e58225 | 909 | igmp_send_query(pim_ifp->igmp_version, 0 /* igmp_group */, igmp->fd, |
d62a17ae | 910 | igmp->interface->name, query_buf, sizeof(query_buf), |
911 | 0 /* num_sources */, dst_addr, group_addr, | |
18adcff1 | 912 | pim_ifp->gm_query_max_response_time_dsec, |
d62a17ae | 913 | 1 /* s_flag: always set for general queries */, |
914 | igmp->querier_robustness_variable, | |
915 | igmp->querier_query_interval); | |
916 | ||
917 | pim_igmp_general_query_on(igmp); | |
12e41d03 DL |
918 | } |
919 | ||
c5f76fad | 920 | static void sock_close(struct gm_sock *igmp) |
12e41d03 | 921 | { |
d62a17ae | 922 | pim_igmp_other_querier_timer_off(igmp); |
923 | pim_igmp_general_query_off(igmp); | |
924 | ||
925 | if (PIM_DEBUG_IGMP_TRACE_DETAIL) { | |
926 | if (igmp->t_igmp_read) { | |
927 | zlog_debug( | |
ee2bbf7c MS |
928 | "Cancelling READ event on IGMP socket %pI4 fd=%d on interface %s", |
929 | &igmp->ifaddr, igmp->fd, | |
d62a17ae | 930 | igmp->interface->name); |
931 | } | |
932 | } | |
933 | THREAD_OFF(igmp->t_igmp_read); | |
934 | ||
935 | if (close(igmp->fd)) { | |
af4c2728 | 936 | flog_err( |
450971aa | 937 | EC_LIB_SOCKET, |
ee2bbf7c MS |
938 | "Failure closing IGMP socket %pI4 fd=%d on interface %s: errno=%d: %s", |
939 | &igmp->ifaddr, igmp->fd, | |
d62a17ae | 940 | igmp->interface->name, errno, safe_strerror(errno)); |
941 | } | |
942 | ||
943 | if (PIM_DEBUG_IGMP_TRACE_DETAIL) { | |
ee2bbf7c MS |
944 | zlog_debug("Deleted IGMP socket %pI4 fd=%d on interface %s", |
945 | &igmp->ifaddr, igmp->fd, | |
d62a17ae | 946 | igmp->interface->name); |
947 | } | |
12e41d03 DL |
948 | } |
949 | ||
c5f76fad | 950 | void igmp_startup_mode_on(struct gm_sock *igmp) |
12e41d03 | 951 | { |
d62a17ae | 952 | struct pim_interface *pim_ifp; |
12e41d03 | 953 | |
d62a17ae | 954 | pim_ifp = igmp->interface->info; |
12e41d03 | 955 | |
d62a17ae | 956 | /* |
957 | RFC 3376: 8.7. Startup Query Count | |
12e41d03 | 958 | |
d62a17ae | 959 | The Startup Query Count is the number of Queries sent out on |
960 | startup, separated by the Startup Query Interval. Default: the | |
961 | Robustness Variable. | |
962 | */ | |
963 | igmp->startup_query_count = igmp->querier_robustness_variable; | |
12e41d03 | 964 | |
d62a17ae | 965 | /* |
966 | Since we're (re)starting, reset QQI to default Query Interval | |
967 | */ | |
18adcff1 | 968 | igmp->querier_query_interval = pim_ifp->gm_default_query_interval; |
12e41d03 DL |
969 | } |
970 | ||
a16db099 | 971 | static void igmp_group_free(struct gm_group *group) |
12e41d03 | 972 | { |
6a154c88 | 973 | list_delete(&group->group_source_list); |
12e41d03 | 974 | |
d62a17ae | 975 | XFREE(MTYPE_PIM_IGMP_GROUP, group); |
12e41d03 DL |
976 | } |
977 | ||
dda4d23c | 978 | static void igmp_group_count_incr(struct pim_interface *pim_ifp) |
339f7695 | 979 | { |
339f7695 | 980 | ++pim_ifp->pim->igmp_group_count; |
981 | if (pim_ifp->pim->igmp_group_count | |
982 | == pim_ifp->pim->igmp_watermark_limit) { | |
983 | zlog_warn( | |
984 | "IGMP group count reached watermark limit: %u(vrf: %s)", | |
985 | pim_ifp->pim->igmp_group_count, | |
986 | VRF_LOGNAME(pim_ifp->pim->vrf)); | |
987 | } | |
988 | } | |
989 | ||
dda4d23c | 990 | static void igmp_group_count_decr(struct pim_interface *pim_ifp) |
339f7695 | 991 | { |
339f7695 | 992 | if (pim_ifp->pim->igmp_group_count == 0) { |
993 | zlog_warn("Cannot decrement igmp group count below 0(vrf: %s)", | |
994 | VRF_LOGNAME(pim_ifp->pim->vrf)); | |
995 | return; | |
996 | } | |
997 | ||
998 | --pim_ifp->pim->igmp_group_count; | |
999 | } | |
1000 | ||
a16db099 | 1001 | void igmp_group_delete(struct gm_group *group) |
12e41d03 | 1002 | { |
d62a17ae | 1003 | struct listnode *src_node; |
1004 | struct listnode *src_nextnode; | |
51700107 | 1005 | struct gm_source *src; |
dda4d23c | 1006 | struct pim_interface *pim_ifp = group->interface->info; |
d62a17ae | 1007 | |
1008 | if (PIM_DEBUG_IGMP_TRACE) { | |
1009 | char group_str[INET_ADDRSTRLEN]; | |
1010 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1011 | sizeof(group_str)); | |
dda4d23c DL |
1012 | zlog_debug("Deleting IGMP group %s from interface %s", |
1013 | group_str, group->interface->name); | |
d62a17ae | 1014 | } |
1015 | ||
1016 | for (ALL_LIST_ELEMENTS(group->group_source_list, src_node, src_nextnode, | |
1017 | src)) { | |
1018 | igmp_source_delete(src); | |
1019 | } | |
1020 | ||
28ef0ee1 | 1021 | THREAD_OFF(group->t_group_query_retransmit_timer); |
d62a17ae | 1022 | |
1023 | group_timer_off(group); | |
dda4d23c | 1024 | igmp_group_count_decr(pim_ifp); |
18adcff1 SG |
1025 | listnode_delete(pim_ifp->gm_group_list, group); |
1026 | hash_release(pim_ifp->gm_group_hash, group); | |
d62a17ae | 1027 | |
1028 | igmp_group_free(group); | |
12e41d03 DL |
1029 | } |
1030 | ||
a16db099 | 1031 | void igmp_group_delete_empty_include(struct gm_group *group) |
12e41d03 | 1032 | { |
df5dfb77 DL |
1033 | assert(!group->group_filtermode_isexcl); |
1034 | assert(!listcount(group->group_source_list)); | |
12e41d03 | 1035 | |
d62a17ae | 1036 | igmp_group_delete(group); |
12e41d03 DL |
1037 | } |
1038 | ||
c5f76fad | 1039 | void igmp_sock_free(struct gm_sock *igmp) |
12e41d03 | 1040 | { |
df5dfb77 DL |
1041 | assert(!igmp->t_igmp_read); |
1042 | assert(!igmp->t_igmp_query_timer); | |
1043 | assert(!igmp->t_other_querier_timer); | |
12e41d03 | 1044 | |
d62a17ae | 1045 | XFREE(MTYPE_PIM_IGMP_SOCKET, igmp); |
12e41d03 DL |
1046 | } |
1047 | ||
c5f76fad | 1048 | void igmp_sock_delete(struct gm_sock *igmp) |
12e41d03 | 1049 | { |
d62a17ae | 1050 | struct pim_interface *pim_ifp; |
12e41d03 | 1051 | |
d62a17ae | 1052 | sock_close(igmp); |
12e41d03 | 1053 | |
d62a17ae | 1054 | pim_ifp = igmp->interface->info; |
12e41d03 | 1055 | |
18adcff1 | 1056 | listnode_delete(pim_ifp->gm_socket_list, igmp); |
12e41d03 | 1057 | |
d62a17ae | 1058 | igmp_sock_free(igmp); |
dda4d23c | 1059 | |
18adcff1 | 1060 | if (!listcount(pim_ifp->gm_socket_list)) |
dda4d23c | 1061 | pim_igmp_if_reset(pim_ifp); |
12e41d03 DL |
1062 | } |
1063 | ||
d62a17ae | 1064 | void igmp_sock_delete_all(struct interface *ifp) |
cb24fec4 | 1065 | { |
d62a17ae | 1066 | struct pim_interface *pim_ifp; |
1067 | struct listnode *igmp_node, *igmp_nextnode; | |
c5f76fad | 1068 | struct gm_sock *igmp; |
cb24fec4 | 1069 | |
d62a17ae | 1070 | pim_ifp = ifp->info; |
cb24fec4 | 1071 | |
18adcff1 | 1072 | for (ALL_LIST_ELEMENTS(pim_ifp->gm_socket_list, igmp_node, |
29e58225 | 1073 | igmp_nextnode, igmp)) { |
d62a17ae | 1074 | igmp_sock_delete(igmp); |
1075 | } | |
cb24fec4 DS |
1076 | } |
1077 | ||
d8b87afe | 1078 | static unsigned int igmp_group_hash_key(const void *arg) |
6345a326 | 1079 | { |
a16db099 | 1080 | const struct gm_group *group = arg; |
6345a326 | 1081 | |
d62a17ae | 1082 | return jhash_1word(group->group_addr.s_addr, 0); |
6345a326 DS |
1083 | } |
1084 | ||
74df8d6d | 1085 | static bool igmp_group_hash_equal(const void *arg1, const void *arg2) |
6345a326 | 1086 | { |
a16db099 SG |
1087 | const struct gm_group *g1 = (const struct gm_group *)arg1; |
1088 | const struct gm_group *g2 = (const struct gm_group *)arg2; | |
6345a326 | 1089 | |
d62a17ae | 1090 | if (g1->group_addr.s_addr == g2->group_addr.s_addr) |
74df8d6d | 1091 | return true; |
6345a326 | 1092 | |
74df8d6d | 1093 | return false; |
6345a326 DS |
1094 | } |
1095 | ||
dda4d23c DL |
1096 | void pim_igmp_if_init(struct pim_interface *pim_ifp, struct interface *ifp) |
1097 | { | |
1098 | char hash_name[64]; | |
1099 | ||
18adcff1 SG |
1100 | pim_ifp->gm_socket_list = list_new(); |
1101 | pim_ifp->gm_socket_list->del = (void (*)(void *))igmp_sock_free; | |
dda4d23c | 1102 | |
18adcff1 SG |
1103 | pim_ifp->gm_group_list = list_new(); |
1104 | pim_ifp->gm_group_list->del = (void (*)(void *))igmp_group_free; | |
dda4d23c | 1105 | |
a1a4295a | 1106 | snprintf(hash_name, sizeof(hash_name), "IGMP %s hash", ifp->name); |
18adcff1 SG |
1107 | pim_ifp->gm_group_hash = hash_create(igmp_group_hash_key, |
1108 | igmp_group_hash_equal, hash_name); | |
dda4d23c DL |
1109 | } |
1110 | ||
1111 | void pim_igmp_if_reset(struct pim_interface *pim_ifp) | |
1112 | { | |
1113 | struct listnode *grp_node, *grp_nextnode; | |
a16db099 | 1114 | struct gm_group *grp; |
dda4d23c | 1115 | |
18adcff1 | 1116 | for (ALL_LIST_ELEMENTS(pim_ifp->gm_group_list, grp_node, grp_nextnode, |
dda4d23c DL |
1117 | grp)) { |
1118 | igmp_group_delete(grp); | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | void pim_igmp_if_fini(struct pim_interface *pim_ifp) | |
1123 | { | |
1124 | pim_igmp_if_reset(pim_ifp); | |
1125 | ||
18adcff1 SG |
1126 | assert(pim_ifp->gm_group_list); |
1127 | assert(!listcount(pim_ifp->gm_group_list)); | |
dda4d23c | 1128 | |
18adcff1 SG |
1129 | list_delete(&pim_ifp->gm_group_list); |
1130 | hash_free(pim_ifp->gm_group_hash); | |
dda4d23c | 1131 | |
18adcff1 | 1132 | list_delete(&pim_ifp->gm_socket_list); |
dda4d23c DL |
1133 | } |
1134 | ||
c5f76fad SG |
1135 | static struct gm_sock *igmp_sock_new(int fd, struct in_addr ifaddr, |
1136 | struct interface *ifp, int mtrace_only) | |
12e41d03 | 1137 | { |
d62a17ae | 1138 | struct pim_interface *pim_ifp; |
c5f76fad | 1139 | struct gm_sock *igmp; |
d62a17ae | 1140 | |
1141 | pim_ifp = ifp->info; | |
1142 | ||
1143 | if (PIM_DEBUG_IGMP_TRACE) { | |
1144 | zlog_debug( | |
ee2bbf7c MS |
1145 | "Creating IGMP socket fd=%d for address %pI4 on interface %s", |
1146 | fd, &ifaddr, ifp->name); | |
d62a17ae | 1147 | } |
1148 | ||
1149 | igmp = XCALLOC(MTYPE_PIM_IGMP_SOCKET, sizeof(*igmp)); | |
d62a17ae | 1150 | |
d62a17ae | 1151 | igmp->fd = fd; |
1152 | igmp->interface = ifp; | |
1153 | igmp->ifaddr = ifaddr; | |
9a7cee26 | 1154 | igmp->querier_addr = ifaddr; |
d62a17ae | 1155 | igmp->t_igmp_read = NULL; |
1156 | igmp->t_igmp_query_timer = NULL; | |
1157 | igmp->t_other_querier_timer = NULL; /* no other querier present */ | |
1158 | igmp->querier_robustness_variable = | |
18adcff1 | 1159 | pim_ifp->gm_default_robustness_variable; |
d62a17ae | 1160 | igmp->sock_creation = pim_time_monotonic_sec(); |
1161 | ||
21313cbf MS |
1162 | igmp_stats_init(&igmp->rx_stats); |
1163 | ||
f83f3966 MS |
1164 | if (mtrace_only) { |
1165 | igmp->mtrace_only = mtrace_only; | |
1166 | return igmp; | |
1167 | } | |
1168 | ||
1169 | igmp->mtrace_only = false; | |
1170 | ||
d62a17ae | 1171 | /* |
1172 | igmp_startup_mode_on() will reset QQI: | |
1173 | ||
18adcff1 | 1174 | igmp->querier_query_interval = pim_ifp->gm_default_query_interval; |
d62a17ae | 1175 | */ |
1176 | igmp_startup_mode_on(igmp); | |
1177 | pim_igmp_general_query_on(igmp); | |
1178 | ||
1179 | return igmp; | |
12e41d03 DL |
1180 | } |
1181 | ||
c5f76fad | 1182 | static void igmp_read_on(struct gm_sock *igmp); |
7923d317 | 1183 | |
cc9f21da | 1184 | static void pim_igmp_read(struct thread *t) |
7923d317 | 1185 | { |
d62a17ae | 1186 | uint8_t buf[10000]; |
c5f76fad | 1187 | struct gm_sock *igmp = (struct gm_sock *)THREAD_ARG(t); |
023d3e4a BG |
1188 | struct sockaddr_storage from; |
1189 | struct sockaddr_storage to; | |
d62a17ae | 1190 | socklen_t fromlen = sizeof(from); |
1191 | socklen_t tolen = sizeof(to); | |
1192 | ifindex_t ifindex = -1; | |
d62a17ae | 1193 | int len; |
1194 | ||
2e1cc436 | 1195 | while (1) { |
d62a17ae | 1196 | len = pim_socket_recvfromto(igmp->fd, buf, sizeof(buf), &from, |
1197 | &fromlen, &to, &tolen, &ifindex); | |
1198 | if (len < 0) { | |
1199 | if (errno == EINTR) | |
1200 | continue; | |
1201 | if (errno == EWOULDBLOCK || errno == EAGAIN) | |
1202 | break; | |
1203 | ||
1204 | goto done; | |
1205 | } | |
7923d317 | 1206 | } |
7923d317 | 1207 | |
d62a17ae | 1208 | done: |
1209 | igmp_read_on(igmp); | |
7923d317 DS |
1210 | } |
1211 | ||
c5f76fad | 1212 | static void igmp_read_on(struct gm_sock *igmp) |
7923d317 DS |
1213 | { |
1214 | ||
d62a17ae | 1215 | if (PIM_DEBUG_IGMP_TRACE_DETAIL) { |
1216 | zlog_debug("Scheduling READ event on IGMP socket fd=%d", | |
1217 | igmp->fd); | |
1218 | } | |
36417fcc | 1219 | thread_add_read(router->master, pim_igmp_read, igmp, igmp->fd, |
d62a17ae | 1220 | &igmp->t_igmp_read); |
7923d317 DS |
1221 | } |
1222 | ||
c5f76fad SG |
1223 | struct gm_sock *pim_igmp_sock_add(struct list *igmp_sock_list, |
1224 | struct in_addr ifaddr, struct interface *ifp, | |
1225 | bool mtrace_only) | |
12e41d03 | 1226 | { |
d62a17ae | 1227 | struct pim_interface *pim_ifp; |
c5f76fad | 1228 | struct gm_sock *igmp; |
d05d3f7a | 1229 | struct sockaddr_in sin; |
d62a17ae | 1230 | int fd; |
12e41d03 | 1231 | |
d62a17ae | 1232 | pim_ifp = ifp->info; |
12e41d03 | 1233 | |
d62a17ae | 1234 | fd = igmp_sock_open(ifaddr, ifp, pim_ifp->options); |
1235 | if (fd < 0) { | |
ee2bbf7c MS |
1236 | zlog_warn("Could not open IGMP socket for %pI4 on %s", |
1237 | &ifaddr, ifp->name); | |
d12f46fa | 1238 | return NULL; |
d62a17ae | 1239 | } |
12e41d03 | 1240 | |
d05d3f7a NB |
1241 | sin.sin_family = AF_INET; |
1242 | sin.sin_addr = ifaddr; | |
1243 | sin.sin_port = 0; | |
1244 | if (bind(fd, (struct sockaddr *) &sin, sizeof(sin)) != 0) { | |
262649bd DS |
1245 | zlog_warn("Could not bind IGMP socket for %pI4 on %s: %s(%d)", |
1246 | &ifaddr, ifp->name, strerror(errno), errno); | |
2c85fdd4 DS |
1247 | close(fd); |
1248 | ||
d12f46fa | 1249 | return NULL; |
d05d3f7a NB |
1250 | } |
1251 | ||
f83f3966 | 1252 | igmp = igmp_sock_new(fd, ifaddr, ifp, mtrace_only); |
12e41d03 | 1253 | |
d62a17ae | 1254 | igmp_read_on(igmp); |
7923d317 | 1255 | |
d62a17ae | 1256 | listnode_add(igmp_sock_list, igmp); |
12e41d03 DL |
1257 | |
1258 | #ifdef IGMP_SOCK_DUMP | |
d62a17ae | 1259 | igmp_sock_dump(igmp_sock_array); |
12e41d03 DL |
1260 | #endif |
1261 | ||
d62a17ae | 1262 | return igmp; |
12e41d03 DL |
1263 | } |
1264 | ||
1265 | /* | |
1266 | RFC 3376: 6.5. Switching Router Filter-Modes | |
1267 | ||
1268 | When a router's filter-mode for a group is EXCLUDE and the group | |
1269 | timer expires, the router filter-mode for the group transitions to | |
1270 | INCLUDE. | |
1271 | ||
1272 | A router uses source records with running source timers as its state | |
1273 | for the switch to a filter-mode of INCLUDE. If there are any source | |
1274 | records with source timers greater than zero (i.e., requested to be | |
1275 | forwarded), a router switches to filter-mode of INCLUDE using those | |
1276 | source records. Source records whose timers are zero (from the | |
1277 | previous EXCLUDE mode) are deleted. | |
1278 | */ | |
cc9f21da | 1279 | static void igmp_group_timer(struct thread *t) |
12e41d03 | 1280 | { |
a16db099 | 1281 | struct gm_group *group; |
12e41d03 | 1282 | |
d62a17ae | 1283 | group = THREAD_ARG(t); |
12e41d03 | 1284 | |
d62a17ae | 1285 | if (PIM_DEBUG_IGMP_TRACE) { |
1286 | char group_str[INET_ADDRSTRLEN]; | |
1287 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1288 | sizeof(group_str)); | |
15569c58 | 1289 | zlog_debug("%s: Timer for group %s on interface %s", __func__, |
dda4d23c | 1290 | group_str, group->interface->name); |
d62a17ae | 1291 | } |
12e41d03 | 1292 | |
df5dfb77 | 1293 | assert(group->group_filtermode_isexcl); |
12e41d03 | 1294 | |
d62a17ae | 1295 | group->group_filtermode_isexcl = 0; |
12e41d03 | 1296 | |
d62a17ae | 1297 | /* Any source (*,G) is forwarded only if mode is EXCLUDE {empty} */ |
1298 | igmp_anysource_forward_stop(group); | |
12e41d03 | 1299 | |
d62a17ae | 1300 | igmp_source_delete_expired(group->group_source_list); |
12e41d03 | 1301 | |
df5dfb77 | 1302 | assert(!group->group_filtermode_isexcl); |
12e41d03 | 1303 | |
d62a17ae | 1304 | /* |
1305 | RFC 3376: 6.2.2. Definition of Group Timers | |
12e41d03 | 1306 | |
d62a17ae | 1307 | If there are no more source records for the group, delete group |
1308 | record. | |
1309 | */ | |
1310 | if (listcount(group->group_source_list) < 1) { | |
1311 | igmp_group_delete_empty_include(group); | |
1312 | } | |
12e41d03 DL |
1313 | } |
1314 | ||
a16db099 | 1315 | static void group_timer_off(struct gm_group *group) |
12e41d03 | 1316 | { |
d62a17ae | 1317 | if (!group->t_group_timer) |
1318 | return; | |
1319 | ||
1320 | if (PIM_DEBUG_IGMP_TRACE) { | |
1321 | char group_str[INET_ADDRSTRLEN]; | |
1322 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1323 | sizeof(group_str)); | |
1324 | zlog_debug("Cancelling TIMER event for group %s on %s", | |
dda4d23c | 1325 | group_str, group->interface->name); |
d62a17ae | 1326 | } |
1327 | THREAD_OFF(group->t_group_timer); | |
12e41d03 DL |
1328 | } |
1329 | ||
a16db099 | 1330 | void igmp_group_timer_on(struct gm_group *group, long interval_msec, |
d62a17ae | 1331 | const char *ifname) |
12e41d03 | 1332 | { |
d62a17ae | 1333 | group_timer_off(group); |
1334 | ||
1335 | if (PIM_DEBUG_IGMP_EVENTS) { | |
1336 | char group_str[INET_ADDRSTRLEN]; | |
1337 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1338 | sizeof(group_str)); | |
1339 | zlog_debug( | |
1340 | "Scheduling %ld.%03ld sec TIMER event for group %s on %s", | |
1341 | interval_msec / 1000, interval_msec % 1000, group_str, | |
1342 | ifname); | |
1343 | } | |
1344 | ||
1345 | /* | |
1346 | RFC 3376: 6.2.2. Definition of Group Timers | |
1347 | ||
1348 | The group timer is only used when a group is in EXCLUDE mode and | |
1349 | it represents the time for the *filter-mode* of the group to | |
1350 | expire and switch to INCLUDE mode. | |
1351 | */ | |
df5dfb77 | 1352 | assert(group->group_filtermode_isexcl); |
d62a17ae | 1353 | |
36417fcc DS |
1354 | thread_add_timer_msec(router->master, igmp_group_timer, group, |
1355 | interval_msec, &group->t_group_timer); | |
12e41d03 DL |
1356 | } |
1357 | ||
c5f76fad | 1358 | struct gm_group *find_group_by_addr(struct gm_sock *igmp, |
a16db099 | 1359 | struct in_addr group_addr) |
12e41d03 | 1360 | { |
a16db099 | 1361 | struct gm_group lookup; |
dda4d23c | 1362 | struct pim_interface *pim_ifp = igmp->interface->info; |
12e41d03 | 1363 | |
d62a17ae | 1364 | lookup.group_addr.s_addr = group_addr.s_addr; |
12e41d03 | 1365 | |
18adcff1 | 1366 | return hash_lookup(pim_ifp->gm_group_hash, &lookup); |
12e41d03 DL |
1367 | } |
1368 | ||
c5f76fad | 1369 | struct gm_group *igmp_add_group_by_addr(struct gm_sock *igmp, |
a16db099 | 1370 | struct in_addr group_addr) |
12e41d03 | 1371 | { |
a16db099 | 1372 | struct gm_group *group; |
dda4d23c | 1373 | struct pim_interface *pim_ifp = igmp->interface->info; |
d62a17ae | 1374 | |
1375 | group = find_group_by_addr(igmp, group_addr); | |
1376 | if (group) { | |
1377 | return group; | |
1378 | } | |
1379 | ||
1380 | if (!pim_is_group_224_4(group_addr)) { | |
1381 | zlog_warn("%s: Group Specified is not part of 224.0.0.0/4", | |
15569c58 | 1382 | __func__); |
d62a17ae | 1383 | return NULL; |
1384 | } | |
1385 | ||
1386 | if (pim_is_group_224_0_0_0_24(group_addr)) { | |
6b5122a0 DS |
1387 | if (PIM_DEBUG_IGMP_TRACE) |
1388 | zlog_debug( | |
ee2bbf7c MS |
1389 | "%s: Group specified %pI4 is part of 224.0.0.0/24", |
1390 | __func__, &group_addr); | |
d62a17ae | 1391 | return NULL; |
1392 | } | |
1393 | /* | |
1394 | Non-existant group is created as INCLUDE {empty}: | |
1395 | ||
1396 | RFC 3376 - 5.1. Action on Change of Interface State | |
1397 | ||
1398 | If no interface state existed for that multicast address before | |
1399 | the change (i.e., the change consisted of creating a new | |
1400 | per-interface record), or if no state exists after the change | |
1401 | (i.e., the change consisted of deleting a per-interface record), | |
1402 | then the "non-existent" state is considered to have a filter mode | |
1403 | of INCLUDE and an empty source list. | |
1404 | */ | |
1405 | ||
1406 | group = XCALLOC(MTYPE_PIM_IGMP_GROUP, sizeof(*group)); | |
d62a17ae | 1407 | |
1408 | group->group_source_list = list_new(); | |
d62a17ae | 1409 | group->group_source_list->del = (void (*)(void *))igmp_source_free; |
1410 | ||
1411 | group->t_group_timer = NULL; | |
1412 | group->t_group_query_retransmit_timer = NULL; | |
1413 | group->group_specific_query_retransmit_count = 0; | |
1414 | group->group_addr = group_addr; | |
dda4d23c | 1415 | group->interface = igmp->interface; |
d62a17ae | 1416 | group->last_igmp_v1_report_dsec = -1; |
1417 | group->last_igmp_v2_report_dsec = -1; | |
1418 | group->group_creation = pim_time_monotonic_sec(); | |
1419 | group->igmp_version = IGMP_DEFAULT_VERSION; | |
1420 | ||
1421 | /* initialize new group as INCLUDE {empty} */ | |
1422 | group->group_filtermode_isexcl = 0; /* 0=INCLUDE, 1=EXCLUDE */ | |
1423 | ||
18adcff1 SG |
1424 | listnode_add(pim_ifp->gm_group_list, group); |
1425 | group = hash_get(pim_ifp->gm_group_hash, group, hash_alloc_intern); | |
d62a17ae | 1426 | |
1427 | if (PIM_DEBUG_IGMP_TRACE) { | |
1428 | char group_str[INET_ADDRSTRLEN]; | |
1429 | pim_inet4_dump("<group?>", group->group_addr, group_str, | |
1430 | sizeof(group_str)); | |
1431 | zlog_debug( | |
1432 | "Creating new IGMP group %s on socket %d interface %s", | |
1433 | group_str, igmp->fd, igmp->interface->name); | |
1434 | } | |
1435 | ||
dda4d23c | 1436 | igmp_group_count_incr(pim_ifp); |
339f7695 | 1437 | |
d62a17ae | 1438 | /* |
1439 | RFC 3376: 6.2.2. Definition of Group Timers | |
1440 | ||
1441 | The group timer is only used when a group is in EXCLUDE mode and | |
1442 | it represents the time for the *filter-mode* of the group to | |
1443 | expire and switch to INCLUDE mode. | |
1444 | */ | |
df5dfb77 DL |
1445 | assert(!group->group_filtermode_isexcl); /* INCLUDE mode */ |
1446 | assert(!group->t_group_timer); /* group timer == 0 */ | |
d62a17ae | 1447 | |
1448 | /* Any source (*,G) is forwarded only if mode is EXCLUDE {empty} */ | |
1449 | igmp_anysource_forward_stop(group); | |
1450 | ||
1451 | return group; | |
12e41d03 | 1452 | } |
b05b72e8 | 1453 | |
a16db099 | 1454 | void igmp_send_query(int igmp_version, struct gm_group *group, int fd, |
d62a17ae | 1455 | const char *ifname, char *query_buf, int query_buf_size, |
1456 | int num_sources, struct in_addr dst_addr, | |
1457 | struct in_addr group_addr, | |
1458 | int query_max_response_time_dsec, uint8_t s_flag, | |
1459 | uint8_t querier_robustness_variable, | |
1460 | uint16_t querier_query_interval) | |
b05b72e8 | 1461 | { |
d62a17ae | 1462 | if (igmp_version == 3) { |
1463 | igmp_v3_send_query(group, fd, ifname, query_buf, query_buf_size, | |
1464 | num_sources, dst_addr, group_addr, | |
1465 | query_max_response_time_dsec, s_flag, | |
1466 | querier_robustness_variable, | |
1467 | querier_query_interval); | |
1468 | } else if (igmp_version == 2) { | |
1469 | igmp_v2_send_query(group, fd, ifname, query_buf, dst_addr, | |
1470 | group_addr, query_max_response_time_dsec); | |
1471 | } | |
b05b72e8 | 1472 | } |
6741a5bb | 1473 | |
1474 | void igmp_send_query_on_intf(struct interface *ifp, int igmp_ver) | |
1475 | { | |
1476 | struct pim_interface *pim_ifp = ifp->info; | |
1477 | struct listnode *sock_node = NULL; | |
c5f76fad | 1478 | struct gm_sock *igmp = NULL; |
6741a5bb | 1479 | struct in_addr dst_addr; |
1480 | struct in_addr group_addr; | |
1481 | int query_buf_size; | |
1482 | ||
1483 | if (!igmp_ver) | |
1484 | igmp_ver = 2; | |
1485 | ||
1486 | if (igmp_ver == 3) | |
1487 | query_buf_size = PIM_IGMP_BUFSIZE_WRITE; | |
1488 | else | |
1489 | query_buf_size = IGMP_V12_MSG_SIZE; | |
1490 | ||
1491 | dst_addr.s_addr = htonl(INADDR_ALLHOSTS_GROUP); | |
1492 | group_addr.s_addr = PIM_NET_INADDR_ANY; | |
1493 | ||
1494 | if (PIM_DEBUG_IGMP_TRACE) | |
18adcff1 | 1495 | zlog_debug("Issuing general query on request on %s", ifp->name); |
6741a5bb | 1496 | |
18adcff1 | 1497 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->gm_socket_list, sock_node, igmp)) { |
6741a5bb | 1498 | |
1499 | char query_buf[query_buf_size]; | |
1500 | ||
1501 | igmp_send_query(igmp_ver, 0 /* igmp_group */, igmp->fd, | |
1502 | igmp->interface->name, query_buf, | |
1503 | sizeof(query_buf), 0 /* num_sources */, | |
1504 | dst_addr, group_addr, | |
18adcff1 | 1505 | pim_ifp->gm_query_max_response_time_dsec, |
6741a5bb | 1506 | 1 /* s_flag: always set for general queries */, |
1507 | igmp->querier_robustness_variable, | |
1508 | igmp->querier_query_interval); | |
1509 | } | |
1510 | } |