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1 | /* | |
2 | * PIM for Quagga | |
3 | * Copyright (C) 2008 Everton da Silva Marques | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along | |
15 | * with this program; see the file COPYING; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | ||
19 | #include <zebra.h> | |
20 | ||
21 | #include "if.h" | |
22 | #include "log.h" | |
23 | #include "vty.h" | |
24 | #include "memory.h" | |
25 | #include "prefix.h" | |
26 | #include "vrf.h" | |
27 | #include "linklist.h" | |
28 | #include "plist.h" | |
29 | #include "hash.h" | |
30 | #include "ferr.h" | |
31 | ||
32 | #include "pimd.h" | |
33 | #include "pim_instance.h" | |
34 | #include "pim_zebra.h" | |
35 | #include "pim_iface.h" | |
36 | #include "pim_igmp.h" | |
37 | #include "pim_mroute.h" | |
38 | #include "pim_oil.h" | |
39 | #include "pim_str.h" | |
40 | #include "pim_pim.h" | |
41 | #include "pim_neighbor.h" | |
42 | #include "pim_ifchannel.h" | |
43 | #include "pim_sock.h" | |
44 | #include "pim_time.h" | |
45 | #include "pim_ssmpingd.h" | |
46 | #include "pim_rp.h" | |
47 | #include "pim_nht.h" | |
48 | #include "pim_jp_agg.h" | |
49 | #include "pim_igmp_join.h" | |
50 | ||
51 | static void pim_if_igmp_join_del_all(struct interface *ifp); | |
52 | static int igmp_join_sock(const char *ifname, ifindex_t ifindex, | |
53 | struct in_addr group_addr, | |
54 | struct in_addr source_addr); | |
55 | ||
56 | void pim_if_init(struct pim_instance *pim) | |
57 | { | |
58 | int i; | |
59 | ||
60 | for (i = 0; i < MAXVIFS; i++) | |
61 | pim->iface_vif_index[i] = 0; | |
62 | } | |
63 | ||
64 | void pim_if_terminate(struct pim_instance *pim) | |
65 | { | |
66 | struct interface *ifp; | |
67 | ||
68 | FOR_ALL_INTERFACES (pim->vrf, ifp) { | |
69 | struct pim_interface *pim_ifp = ifp->info; | |
70 | ||
71 | if (!pim_ifp) | |
72 | continue; | |
73 | ||
74 | pim_if_delete(ifp); | |
75 | } | |
76 | return; | |
77 | } | |
78 | ||
79 | static void pim_sec_addr_free(struct pim_secondary_addr *sec_addr) | |
80 | { | |
81 | XFREE(MTYPE_PIM_SEC_ADDR, sec_addr); | |
82 | } | |
83 | ||
84 | static int pim_sec_addr_comp(const void *p1, const void *p2) | |
85 | { | |
86 | const struct pim_secondary_addr *sec1 = p1; | |
87 | const struct pim_secondary_addr *sec2 = p2; | |
88 | ||
89 | if (sec1->addr.family == AF_INET && sec2->addr.family == AF_INET6) | |
90 | return -1; | |
91 | ||
92 | if (sec1->addr.family == AF_INET6 && sec2->addr.family == AF_INET) | |
93 | return 1; | |
94 | ||
95 | if (sec1->addr.family == AF_INET) { | |
96 | if (ntohl(sec1->addr.u.prefix4.s_addr) | |
97 | < ntohl(sec2->addr.u.prefix4.s_addr)) | |
98 | return -1; | |
99 | ||
100 | if (ntohl(sec1->addr.u.prefix4.s_addr) | |
101 | > ntohl(sec2->addr.u.prefix4.s_addr)) | |
102 | return 1; | |
103 | } else { | |
104 | return memcmp(&sec1->addr.u.prefix6, &sec2->addr.u.prefix6, | |
105 | sizeof(struct in6_addr)); | |
106 | } | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | struct pim_interface *pim_if_new(struct interface *ifp, bool igmp, bool pim, | |
112 | bool ispimreg) | |
113 | { | |
114 | struct pim_interface *pim_ifp; | |
115 | ||
116 | zassert(ifp); | |
117 | zassert(!ifp->info); | |
118 | ||
119 | pim_ifp = XCALLOC(MTYPE_PIM_INTERFACE, sizeof(*pim_ifp)); | |
120 | ||
121 | pim_ifp->options = 0; | |
122 | pim_ifp->pim = pim_get_pim_instance(ifp->vrf_id); | |
123 | pim_ifp->mroute_vif_index = -1; | |
124 | ||
125 | pim_ifp->igmp_version = IGMP_DEFAULT_VERSION; | |
126 | pim_ifp->igmp_default_robustness_variable = | |
127 | IGMP_DEFAULT_ROBUSTNESS_VARIABLE; | |
128 | pim_ifp->igmp_default_query_interval = IGMP_GENERAL_QUERY_INTERVAL; | |
129 | pim_ifp->igmp_query_max_response_time_dsec = | |
130 | IGMP_QUERY_MAX_RESPONSE_TIME_DSEC; | |
131 | pim_ifp->igmp_specific_query_max_response_time_dsec = | |
132 | IGMP_SPECIFIC_QUERY_MAX_RESPONSE_TIME_DSEC; | |
133 | ||
134 | /* | |
135 | RFC 3376: 8.3. Query Response Interval | |
136 | The number of seconds represented by the [Query Response Interval] | |
137 | must be less than the [Query Interval]. | |
138 | */ | |
139 | zassert(pim_ifp->igmp_query_max_response_time_dsec | |
140 | < pim_ifp->igmp_default_query_interval); | |
141 | ||
142 | if (pim) | |
143 | PIM_IF_DO_PIM(pim_ifp->options); | |
144 | if (igmp) | |
145 | PIM_IF_DO_IGMP(pim_ifp->options); | |
146 | ||
147 | PIM_IF_DO_IGMP_LISTEN_ALLROUTERS(pim_ifp->options); | |
148 | ||
149 | pim_ifp->igmp_join_list = NULL; | |
150 | pim_ifp->igmp_socket_list = NULL; | |
151 | pim_ifp->pim_neighbor_list = NULL; | |
152 | pim_ifp->upstream_switch_list = NULL; | |
153 | pim_ifp->pim_generation_id = 0; | |
154 | ||
155 | /* list of struct igmp_sock */ | |
156 | pim_ifp->igmp_socket_list = list_new(); | |
157 | pim_ifp->igmp_socket_list->del = (void (*)(void *))igmp_sock_free; | |
158 | ||
159 | /* list of struct pim_neighbor */ | |
160 | pim_ifp->pim_neighbor_list = list_new(); | |
161 | pim_ifp->pim_neighbor_list->del = (void (*)(void *))pim_neighbor_free; | |
162 | ||
163 | pim_ifp->upstream_switch_list = list_new(); | |
164 | pim_ifp->upstream_switch_list->del = | |
165 | (void (*)(void *))pim_jp_agg_group_list_free; | |
166 | pim_ifp->upstream_switch_list->cmp = pim_jp_agg_group_list_cmp; | |
167 | ||
168 | pim_ifp->sec_addr_list = list_new(); | |
169 | pim_ifp->sec_addr_list->del = (void (*)(void *))pim_sec_addr_free; | |
170 | pim_ifp->sec_addr_list->cmp = | |
171 | (int (*)(void *, void *))pim_sec_addr_comp; | |
172 | ||
173 | RB_INIT(pim_ifchannel_rb, &pim_ifp->ifchannel_rb); | |
174 | ||
175 | ifp->info = pim_ifp; | |
176 | ||
177 | pim_sock_reset(ifp); | |
178 | ||
179 | pim_if_add_vif(ifp, ispimreg); | |
180 | ||
181 | return pim_ifp; | |
182 | } | |
183 | ||
184 | void pim_if_delete(struct interface *ifp) | |
185 | { | |
186 | struct pim_interface *pim_ifp; | |
187 | struct pim_ifchannel *ch; | |
188 | ||
189 | zassert(ifp); | |
190 | pim_ifp = ifp->info; | |
191 | zassert(pim_ifp); | |
192 | ||
193 | if (pim_ifp->igmp_join_list) { | |
194 | pim_if_igmp_join_del_all(ifp); | |
195 | } | |
196 | ||
197 | pim_ifchannel_delete_all(ifp); | |
198 | igmp_sock_delete_all(ifp); | |
199 | ||
200 | pim_neighbor_delete_all(ifp, "Interface removed from configuration"); | |
201 | ||
202 | pim_if_del_vif(ifp); | |
203 | ||
204 | list_delete_and_null(&pim_ifp->igmp_socket_list); | |
205 | list_delete_and_null(&pim_ifp->pim_neighbor_list); | |
206 | list_delete_and_null(&pim_ifp->upstream_switch_list); | |
207 | list_delete_and_null(&pim_ifp->sec_addr_list); | |
208 | ||
209 | if (pim_ifp->boundary_oil_plist) | |
210 | XFREE(MTYPE_PIM_INTERFACE, pim_ifp->boundary_oil_plist); | |
211 | ||
212 | while (!RB_EMPTY(pim_ifchannel_rb, &pim_ifp->ifchannel_rb)) { | |
213 | ch = RB_ROOT(pim_ifchannel_rb, &pim_ifp->ifchannel_rb); | |
214 | ||
215 | pim_ifchannel_delete(ch); | |
216 | } | |
217 | ||
218 | XFREE(MTYPE_PIM_INTERFACE, pim_ifp); | |
219 | ||
220 | ifp->info = NULL; | |
221 | } | |
222 | ||
223 | void pim_if_update_could_assert(struct interface *ifp) | |
224 | { | |
225 | struct pim_interface *pim_ifp; | |
226 | struct pim_ifchannel *ch; | |
227 | ||
228 | pim_ifp = ifp->info; | |
229 | zassert(pim_ifp); | |
230 | ||
231 | RB_FOREACH (ch, pim_ifchannel_rb, &pim_ifp->ifchannel_rb) { | |
232 | pim_ifchannel_update_could_assert(ch); | |
233 | } | |
234 | } | |
235 | ||
236 | static void pim_if_update_my_assert_metric(struct interface *ifp) | |
237 | { | |
238 | struct pim_interface *pim_ifp; | |
239 | struct pim_ifchannel *ch; | |
240 | ||
241 | pim_ifp = ifp->info; | |
242 | zassert(pim_ifp); | |
243 | ||
244 | RB_FOREACH (ch, pim_ifchannel_rb, &pim_ifp->ifchannel_rb) { | |
245 | pim_ifchannel_update_my_assert_metric(ch); | |
246 | } | |
247 | } | |
248 | ||
249 | static void pim_addr_change(struct interface *ifp) | |
250 | { | |
251 | struct pim_interface *pim_ifp; | |
252 | ||
253 | pim_ifp = ifp->info; | |
254 | zassert(pim_ifp); | |
255 | ||
256 | pim_if_dr_election(ifp); /* router's own DR Priority (addr) changes -- | |
257 | Done TODO T30 */ | |
258 | pim_if_update_join_desired(pim_ifp); /* depends on DR */ | |
259 | pim_if_update_could_assert(ifp); /* depends on DR */ | |
260 | pim_if_update_my_assert_metric(ifp); /* depends on could_assert */ | |
261 | pim_if_update_assert_tracking_desired( | |
262 | ifp); /* depends on DR, join_desired */ | |
263 | ||
264 | /* | |
265 | RFC 4601: 4.3.1. Sending Hello Messages | |
266 | ||
267 | 1) Before an interface goes down or changes primary IP address, a | |
268 | Hello message with a zero HoldTime should be sent immediately | |
269 | (with the old IP address if the IP address changed). | |
270 | -- FIXME See CAVEAT C13 | |
271 | ||
272 | 2) After an interface has changed its IP address, it MUST send a | |
273 | Hello message with its new IP address. | |
274 | -- DONE below | |
275 | ||
276 | 3) If an interface changes one of its secondary IP addresses, a | |
277 | Hello message with an updated Address_List option and a non-zero | |
278 | HoldTime should be sent immediately. | |
279 | -- FIXME See TODO T31 | |
280 | */ | |
281 | pim_ifp->pim_ifstat_hello_sent = 0; /* reset hello counter */ | |
282 | if (pim_ifp->pim_sock_fd < 0) | |
283 | return; | |
284 | pim_hello_restart_now(ifp); /* send hello and restart timer */ | |
285 | } | |
286 | ||
287 | static int detect_primary_address_change(struct interface *ifp, | |
288 | int force_prim_as_any, | |
289 | const char *caller) | |
290 | { | |
291 | struct pim_interface *pim_ifp = ifp->info; | |
292 | struct in_addr new_prim_addr; | |
293 | int changed; | |
294 | ||
295 | if (force_prim_as_any) | |
296 | new_prim_addr.s_addr = INADDR_ANY; | |
297 | else | |
298 | new_prim_addr = pim_find_primary_addr(ifp); | |
299 | ||
300 | changed = new_prim_addr.s_addr != pim_ifp->primary_address.s_addr; | |
301 | ||
302 | if (PIM_DEBUG_ZEBRA) { | |
303 | char new_prim_str[INET_ADDRSTRLEN]; | |
304 | char old_prim_str[INET_ADDRSTRLEN]; | |
305 | pim_inet4_dump("<new?>", new_prim_addr, new_prim_str, | |
306 | sizeof(new_prim_str)); | |
307 | pim_inet4_dump("<old?>", pim_ifp->primary_address, old_prim_str, | |
308 | sizeof(old_prim_str)); | |
309 | zlog_debug("%s: old=%s new=%s on interface %s: %s", | |
310 | __PRETTY_FUNCTION__, old_prim_str, new_prim_str, | |
311 | ifp->name, changed ? "changed" : "unchanged"); | |
312 | } | |
313 | ||
314 | if (changed) { | |
315 | pim_ifp->primary_address = new_prim_addr; | |
316 | } | |
317 | ||
318 | return changed; | |
319 | } | |
320 | ||
321 | static struct pim_secondary_addr * | |
322 | pim_sec_addr_find(struct pim_interface *pim_ifp, struct prefix *addr) | |
323 | { | |
324 | struct pim_secondary_addr *sec_addr; | |
325 | struct listnode *node; | |
326 | ||
327 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->sec_addr_list, node, sec_addr)) { | |
328 | if (prefix_cmp(&sec_addr->addr, addr)) { | |
329 | return sec_addr; | |
330 | } | |
331 | } | |
332 | ||
333 | return NULL; | |
334 | } | |
335 | ||
336 | static void pim_sec_addr_del(struct pim_interface *pim_ifp, | |
337 | struct pim_secondary_addr *sec_addr) | |
338 | { | |
339 | listnode_delete(pim_ifp->sec_addr_list, sec_addr); | |
340 | pim_sec_addr_free(sec_addr); | |
341 | } | |
342 | ||
343 | static int pim_sec_addr_add(struct pim_interface *pim_ifp, struct prefix *addr) | |
344 | { | |
345 | int changed = 0; | |
346 | struct pim_secondary_addr *sec_addr; | |
347 | ||
348 | sec_addr = pim_sec_addr_find(pim_ifp, addr); | |
349 | if (sec_addr) { | |
350 | sec_addr->flags &= ~PIM_SEC_ADDRF_STALE; | |
351 | return changed; | |
352 | } | |
353 | ||
354 | sec_addr = XCALLOC(MTYPE_PIM_SEC_ADDR, sizeof(*sec_addr)); | |
355 | ||
356 | changed = 1; | |
357 | sec_addr->addr = *addr; | |
358 | listnode_add_sort(pim_ifp->sec_addr_list, sec_addr); | |
359 | ||
360 | return changed; | |
361 | } | |
362 | ||
363 | static int pim_sec_addr_del_all(struct pim_interface *pim_ifp) | |
364 | { | |
365 | int changed = 0; | |
366 | ||
367 | if (!list_isempty(pim_ifp->sec_addr_list)) { | |
368 | changed = 1; | |
369 | /* remove all nodes and free up the list itself */ | |
370 | list_delete_all_node(pim_ifp->sec_addr_list); | |
371 | } | |
372 | ||
373 | return changed; | |
374 | } | |
375 | ||
376 | static int pim_sec_addr_update(struct interface *ifp) | |
377 | { | |
378 | struct pim_interface *pim_ifp = ifp->info; | |
379 | struct connected *ifc; | |
380 | struct listnode *node; | |
381 | struct listnode *nextnode; | |
382 | struct pim_secondary_addr *sec_addr; | |
383 | int changed = 0; | |
384 | ||
385 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->sec_addr_list, node, sec_addr)) { | |
386 | sec_addr->flags |= PIM_SEC_ADDRF_STALE; | |
387 | } | |
388 | ||
389 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) { | |
390 | struct prefix *p = ifc->address; | |
391 | ||
392 | if (PIM_INADDR_IS_ANY(p->u.prefix4)) { | |
393 | continue; | |
394 | } | |
395 | ||
396 | if (pim_ifp->primary_address.s_addr == p->u.prefix4.s_addr) { | |
397 | /* don't add the primary address into the secondary | |
398 | * address list */ | |
399 | continue; | |
400 | } | |
401 | ||
402 | if (pim_sec_addr_add(pim_ifp, p)) { | |
403 | changed = 1; | |
404 | } | |
405 | } | |
406 | ||
407 | /* Drop stale entries */ | |
408 | for (ALL_LIST_ELEMENTS(pim_ifp->sec_addr_list, node, nextnode, | |
409 | sec_addr)) { | |
410 | if (sec_addr->flags & PIM_SEC_ADDRF_STALE) { | |
411 | pim_sec_addr_del(pim_ifp, sec_addr); | |
412 | changed = 1; | |
413 | } | |
414 | } | |
415 | ||
416 | return changed; | |
417 | } | |
418 | ||
419 | static int detect_secondary_address_change(struct interface *ifp, | |
420 | int force_prim_as_any, | |
421 | const char *caller) | |
422 | { | |
423 | struct pim_interface *pim_ifp = ifp->info; | |
424 | int changed = 0; | |
425 | ||
426 | if (force_prim_as_any) { | |
427 | /* if primary address is being forced to zero just flush the | |
428 | * secondary address list */ | |
429 | changed = pim_sec_addr_del_all(pim_ifp); | |
430 | } else { | |
431 | /* re-evaluate the secondary address list */ | |
432 | changed = pim_sec_addr_update(ifp); | |
433 | } | |
434 | ||
435 | return changed; | |
436 | } | |
437 | ||
438 | static void detect_address_change(struct interface *ifp, int force_prim_as_any, | |
439 | const char *caller) | |
440 | { | |
441 | int changed = 0; | |
442 | struct pim_interface *pim_ifp; | |
443 | ||
444 | pim_ifp = ifp->info; | |
445 | if (!pim_ifp) | |
446 | return; | |
447 | ||
448 | if (detect_primary_address_change(ifp, force_prim_as_any, caller)) { | |
449 | changed = 1; | |
450 | } | |
451 | ||
452 | if (detect_secondary_address_change(ifp, force_prim_as_any, caller)) { | |
453 | changed = 1; | |
454 | } | |
455 | ||
456 | ||
457 | if (changed) { | |
458 | if (!PIM_IF_TEST_PIM(pim_ifp->options)) { | |
459 | return; | |
460 | } | |
461 | ||
462 | pim_addr_change(ifp); | |
463 | } | |
464 | ||
465 | /* XXX: if we have unnumbered interfaces we need to run detect address | |
466 | * address change on all of them when the lo address changes */ | |
467 | } | |
468 | ||
469 | int pim_update_source_set(struct interface *ifp, struct in_addr source) | |
470 | { | |
471 | struct pim_interface *pim_ifp = ifp->info; | |
472 | ||
473 | if (!pim_ifp) { | |
474 | return PIM_IFACE_NOT_FOUND; | |
475 | } | |
476 | ||
477 | if (pim_ifp->update_source.s_addr == source.s_addr) { | |
478 | return PIM_UPDATE_SOURCE_DUP; | |
479 | } | |
480 | ||
481 | pim_ifp->update_source = source; | |
482 | detect_address_change(ifp, 0 /* force_prim_as_any */, | |
483 | __PRETTY_FUNCTION__); | |
484 | ||
485 | return PIM_SUCCESS; | |
486 | } | |
487 | ||
488 | void pim_if_addr_add(struct connected *ifc) | |
489 | { | |
490 | struct pim_interface *pim_ifp; | |
491 | struct interface *ifp; | |
492 | struct in_addr ifaddr; | |
493 | ||
494 | zassert(ifc); | |
495 | ||
496 | ifp = ifc->ifp; | |
497 | zassert(ifp); | |
498 | pim_ifp = ifp->info; | |
499 | if (!pim_ifp) | |
500 | return; | |
501 | ||
502 | if (!if_is_operative(ifp)) | |
503 | return; | |
504 | ||
505 | if (PIM_DEBUG_ZEBRA) { | |
506 | char buf[BUFSIZ]; | |
507 | prefix2str(ifc->address, buf, BUFSIZ); | |
508 | zlog_debug("%s: %s ifindex=%d connected IP address %s %s", | |
509 | __PRETTY_FUNCTION__, ifp->name, ifp->ifindex, buf, | |
510 | CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY) | |
511 | ? "secondary" | |
512 | : "primary"); | |
513 | } | |
514 | ||
515 | ifaddr = ifc->address->u.prefix4; | |
516 | ||
517 | detect_address_change(ifp, 0, __PRETTY_FUNCTION__); | |
518 | ||
519 | // if (ifc->address->family != AF_INET) | |
520 | // return; | |
521 | ||
522 | if (PIM_IF_TEST_IGMP(pim_ifp->options)) { | |
523 | struct igmp_sock *igmp; | |
524 | ||
525 | /* lookup IGMP socket */ | |
526 | igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->igmp_socket_list, | |
527 | ifaddr); | |
528 | if (!igmp) { | |
529 | /* if addr new, add IGMP socket */ | |
530 | if (ifc->address->family == AF_INET) | |
531 | pim_igmp_sock_add(pim_ifp->igmp_socket_list, | |
532 | ifaddr, ifp, false); | |
533 | } else if (igmp->mtrace_only) { | |
534 | igmp_sock_delete(igmp); | |
535 | pim_igmp_sock_add(pim_ifp->igmp_socket_list, ifaddr, | |
536 | ifp, false); | |
537 | } | |
538 | ||
539 | /* Replay Static IGMP groups */ | |
540 | if (pim_ifp->igmp_join_list) { | |
541 | struct listnode *node; | |
542 | struct listnode *nextnode; | |
543 | struct igmp_join *ij; | |
544 | int join_fd; | |
545 | ||
546 | for (ALL_LIST_ELEMENTS(pim_ifp->igmp_join_list, node, | |
547 | nextnode, ij)) { | |
548 | /* Close socket and reopen with Source and Group | |
549 | */ | |
550 | close(ij->sock_fd); | |
551 | join_fd = igmp_join_sock( | |
552 | ifp->name, ifp->ifindex, ij->group_addr, | |
553 | ij->source_addr); | |
554 | if (join_fd < 0) { | |
555 | char group_str[INET_ADDRSTRLEN]; | |
556 | char source_str[INET_ADDRSTRLEN]; | |
557 | pim_inet4_dump("<grp?>", ij->group_addr, | |
558 | group_str, | |
559 | sizeof(group_str)); | |
560 | pim_inet4_dump( | |
561 | "<src?>", ij->source_addr, | |
562 | source_str, sizeof(source_str)); | |
563 | zlog_warn( | |
564 | "%s: igmp_join_sock() failure for IGMP group %s source %s on interface %s", | |
565 | __PRETTY_FUNCTION__, group_str, | |
566 | source_str, ifp->name); | |
567 | /* warning only */ | |
568 | } else | |
569 | ij->sock_fd = join_fd; | |
570 | } | |
571 | } | |
572 | } /* igmp */ | |
573 | else { | |
574 | struct igmp_sock *igmp; | |
575 | ||
576 | /* lookup IGMP socket */ | |
577 | igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->igmp_socket_list, | |
578 | ifaddr); | |
579 | if (ifc->address->family == AF_INET) { | |
580 | if (igmp) | |
581 | igmp_sock_delete(igmp); | |
582 | /* if addr new, add IGMP socket */ | |
583 | pim_igmp_sock_add(pim_ifp->igmp_socket_list, ifaddr, | |
584 | ifp, true); | |
585 | } | |
586 | } /* igmp mtrace only */ | |
587 | ||
588 | if (PIM_IF_TEST_PIM(pim_ifp->options)) { | |
589 | ||
590 | if (PIM_INADDR_ISNOT_ANY(pim_ifp->primary_address)) { | |
591 | ||
592 | /* Interface has a valid socket ? */ | |
593 | if (pim_ifp->pim_sock_fd < 0) { | |
594 | if (pim_sock_add(ifp)) { | |
595 | zlog_warn( | |
596 | "Failure creating PIM socket for interface %s", | |
597 | ifp->name); | |
598 | } | |
599 | } | |
600 | struct pim_nexthop_cache *pnc = NULL; | |
601 | struct pim_rpf rpf; | |
602 | struct zclient *zclient = NULL; | |
603 | ||
604 | zclient = pim_zebra_zclient_get(); | |
605 | /* RP config might come prior to (local RP's interface) | |
606 | IF UP event. | |
607 | In this case, pnc would not have pim enabled | |
608 | nexthops. | |
609 | Once Interface is UP and pim info is available, | |
610 | reregister | |
611 | with RNH address to receive update and add the | |
612 | interface as nexthop. */ | |
613 | memset(&rpf, 0, sizeof(struct pim_rpf)); | |
614 | rpf.rpf_addr.family = AF_INET; | |
615 | rpf.rpf_addr.prefixlen = IPV4_MAX_BITLEN; | |
616 | rpf.rpf_addr.u.prefix4 = ifc->address->u.prefix4; | |
617 | pnc = pim_nexthop_cache_find(pim_ifp->pim, &rpf); | |
618 | if (pnc) | |
619 | pim_sendmsg_zebra_rnh(pim_ifp->pim, zclient, | |
620 | pnc, | |
621 | ZEBRA_NEXTHOP_REGISTER); | |
622 | } | |
623 | } /* pim */ | |
624 | ||
625 | /* | |
626 | PIM or IGMP is enabled on interface, and there is at least one | |
627 | address assigned, then try to create a vif_index. | |
628 | */ | |
629 | if (pim_ifp->mroute_vif_index < 0) { | |
630 | pim_if_add_vif(ifp, false); | |
631 | } | |
632 | pim_ifchannel_scan_forward_start(ifp); | |
633 | } | |
634 | ||
635 | static void pim_if_addr_del_igmp(struct connected *ifc) | |
636 | { | |
637 | struct pim_interface *pim_ifp = ifc->ifp->info; | |
638 | struct igmp_sock *igmp; | |
639 | struct in_addr ifaddr; | |
640 | ||
641 | if (ifc->address->family != AF_INET) { | |
642 | /* non-IPv4 address */ | |
643 | return; | |
644 | } | |
645 | ||
646 | if (!pim_ifp) { | |
647 | /* IGMP not enabled on interface */ | |
648 | return; | |
649 | } | |
650 | ||
651 | ifaddr = ifc->address->u.prefix4; | |
652 | ||
653 | /* lookup IGMP socket */ | |
654 | igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->igmp_socket_list, ifaddr); | |
655 | if (igmp) { | |
656 | /* if addr found, del IGMP socket */ | |
657 | igmp_sock_delete(igmp); | |
658 | } | |
659 | } | |
660 | ||
661 | static void pim_if_addr_del_pim(struct connected *ifc) | |
662 | { | |
663 | struct pim_interface *pim_ifp = ifc->ifp->info; | |
664 | ||
665 | if (ifc->address->family != AF_INET) { | |
666 | /* non-IPv4 address */ | |
667 | return; | |
668 | } | |
669 | ||
670 | if (!pim_ifp) { | |
671 | /* PIM not enabled on interface */ | |
672 | return; | |
673 | } | |
674 | ||
675 | if (PIM_INADDR_ISNOT_ANY(pim_ifp->primary_address)) { | |
676 | /* Interface keeps a valid primary address */ | |
677 | return; | |
678 | } | |
679 | ||
680 | if (pim_ifp->pim_sock_fd < 0) { | |
681 | /* Interface does not hold a valid socket any longer */ | |
682 | return; | |
683 | } | |
684 | ||
685 | /* | |
686 | pim_sock_delete() closes the socket, stops read and timer threads, | |
687 | and kills all neighbors. | |
688 | */ | |
689 | pim_sock_delete(ifc->ifp, | |
690 | "last address has been removed from interface"); | |
691 | } | |
692 | ||
693 | void pim_if_addr_del(struct connected *ifc, int force_prim_as_any) | |
694 | { | |
695 | struct interface *ifp; | |
696 | ||
697 | zassert(ifc); | |
698 | ifp = ifc->ifp; | |
699 | zassert(ifp); | |
700 | ||
701 | if (PIM_DEBUG_ZEBRA) { | |
702 | char buf[BUFSIZ]; | |
703 | prefix2str(ifc->address, buf, BUFSIZ); | |
704 | zlog_debug("%s: %s ifindex=%d disconnected IP address %s %s", | |
705 | __PRETTY_FUNCTION__, ifp->name, ifp->ifindex, buf, | |
706 | CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY) | |
707 | ? "secondary" | |
708 | : "primary"); | |
709 | } | |
710 | ||
711 | detect_address_change(ifp, force_prim_as_any, __PRETTY_FUNCTION__); | |
712 | ||
713 | pim_if_addr_del_igmp(ifc); | |
714 | pim_if_addr_del_pim(ifc); | |
715 | } | |
716 | ||
717 | void pim_if_addr_add_all(struct interface *ifp) | |
718 | { | |
719 | struct connected *ifc; | |
720 | struct listnode *node; | |
721 | struct listnode *nextnode; | |
722 | int v4_addrs = 0; | |
723 | int v6_addrs = 0; | |
724 | struct pim_interface *pim_ifp = ifp->info; | |
725 | ||
726 | ||
727 | /* PIM/IGMP enabled ? */ | |
728 | if (!pim_ifp) | |
729 | return; | |
730 | ||
731 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) { | |
732 | struct prefix *p = ifc->address; | |
733 | ||
734 | if (p->family != AF_INET) | |
735 | v6_addrs++; | |
736 | else | |
737 | v4_addrs++; | |
738 | pim_if_addr_add(ifc); | |
739 | } | |
740 | ||
741 | if (!v4_addrs && v6_addrs && !if_is_loopback(ifp)) { | |
742 | if (PIM_IF_TEST_PIM(pim_ifp->options)) { | |
743 | ||
744 | /* Interface has a valid primary address ? */ | |
745 | if (PIM_INADDR_ISNOT_ANY(pim_ifp->primary_address)) { | |
746 | ||
747 | /* Interface has a valid socket ? */ | |
748 | if (pim_ifp->pim_sock_fd < 0) { | |
749 | if (pim_sock_add(ifp)) { | |
750 | zlog_warn( | |
751 | "Failure creating PIM socket for interface %s", | |
752 | ifp->name); | |
753 | } | |
754 | } | |
755 | } | |
756 | } /* pim */ | |
757 | } | |
758 | /* | |
759 | * PIM or IGMP is enabled on interface, and there is at least one | |
760 | * address assigned, then try to create a vif_index. | |
761 | */ | |
762 | if (pim_ifp->mroute_vif_index < 0) { | |
763 | pim_if_add_vif(ifp, false); | |
764 | } | |
765 | pim_ifchannel_scan_forward_start(ifp); | |
766 | ||
767 | pim_rp_setup(pim_ifp->pim); | |
768 | pim_rp_check_on_if_add(pim_ifp); | |
769 | } | |
770 | ||
771 | void pim_if_addr_del_all(struct interface *ifp) | |
772 | { | |
773 | struct connected *ifc; | |
774 | struct listnode *node; | |
775 | struct listnode *nextnode; | |
776 | struct vrf *vrf = vrf_lookup_by_id(ifp->vrf_id); | |
777 | struct pim_instance *pim; | |
778 | ||
779 | if (!vrf) | |
780 | return; | |
781 | pim = vrf->info; | |
782 | ||
783 | /* PIM/IGMP enabled ? */ | |
784 | if (!ifp->info) | |
785 | return; | |
786 | ||
787 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) { | |
788 | struct prefix *p = ifc->address; | |
789 | ||
790 | if (p->family != AF_INET) | |
791 | continue; | |
792 | ||
793 | pim_if_addr_del(ifc, 1 /* force_prim_as_any=true */); | |
794 | } | |
795 | ||
796 | pim_rp_setup(pim); | |
797 | pim_i_am_rp_re_evaluate(pim); | |
798 | } | |
799 | ||
800 | void pim_if_addr_del_all_igmp(struct interface *ifp) | |
801 | { | |
802 | struct connected *ifc; | |
803 | struct listnode *node; | |
804 | struct listnode *nextnode; | |
805 | ||
806 | /* PIM/IGMP enabled ? */ | |
807 | if (!ifp->info) | |
808 | return; | |
809 | ||
810 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) { | |
811 | struct prefix *p = ifc->address; | |
812 | ||
813 | if (p->family != AF_INET) | |
814 | continue; | |
815 | ||
816 | pim_if_addr_del_igmp(ifc); | |
817 | } | |
818 | } | |
819 | ||
820 | void pim_if_addr_del_all_pim(struct interface *ifp) | |
821 | { | |
822 | struct connected *ifc; | |
823 | struct listnode *node; | |
824 | struct listnode *nextnode; | |
825 | ||
826 | /* PIM/IGMP enabled ? */ | |
827 | if (!ifp->info) | |
828 | return; | |
829 | ||
830 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) { | |
831 | struct prefix *p = ifc->address; | |
832 | ||
833 | if (p->family != AF_INET) | |
834 | continue; | |
835 | ||
836 | pim_if_addr_del_pim(ifc); | |
837 | } | |
838 | } | |
839 | ||
840 | struct in_addr pim_find_primary_addr(struct interface *ifp) | |
841 | { | |
842 | struct connected *ifc; | |
843 | struct listnode *node; | |
844 | struct in_addr addr = {0}; | |
845 | int v4_addrs = 0; | |
846 | int v6_addrs = 0; | |
847 | struct pim_interface *pim_ifp = ifp->info; | |
848 | struct vrf *vrf = vrf_lookup_by_id(ifp->vrf_id); | |
849 | ||
850 | if (!vrf) | |
851 | return addr; | |
852 | ||
853 | if (pim_ifp && PIM_INADDR_ISNOT_ANY(pim_ifp->update_source)) { | |
854 | return pim_ifp->update_source; | |
855 | } | |
856 | ||
857 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) { | |
858 | struct prefix *p = ifc->address; | |
859 | ||
860 | if (p->family != AF_INET) { | |
861 | v6_addrs++; | |
862 | continue; | |
863 | } | |
864 | ||
865 | if (PIM_INADDR_IS_ANY(p->u.prefix4)) { | |
866 | zlog_warn( | |
867 | "%s: null IPv4 address connected to interface %s", | |
868 | __PRETTY_FUNCTION__, ifp->name); | |
869 | continue; | |
870 | } | |
871 | ||
872 | v4_addrs++; | |
873 | ||
874 | if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY)) | |
875 | continue; | |
876 | ||
877 | return p->u.prefix4; | |
878 | } | |
879 | ||
880 | /* | |
881 | * If we have no v4_addrs and v6 is configured | |
882 | * We probably are using unnumbered | |
883 | * So let's grab the loopbacks v4 address | |
884 | * and use that as the primary address | |
885 | */ | |
886 | if (!v4_addrs && v6_addrs && !if_is_loopback(ifp)) { | |
887 | struct interface *lo_ifp; | |
888 | // DBS - Come back and check here | |
889 | if (ifp->vrf_id == VRF_DEFAULT) | |
890 | lo_ifp = if_lookup_by_name("lo", vrf->vrf_id); | |
891 | else | |
892 | lo_ifp = if_lookup_by_name(vrf->name, vrf->vrf_id); | |
893 | ||
894 | if (lo_ifp) | |
895 | return pim_find_primary_addr(lo_ifp); | |
896 | } | |
897 | ||
898 | addr.s_addr = PIM_NET_INADDR_ANY; | |
899 | ||
900 | return addr; | |
901 | } | |
902 | ||
903 | static int pim_iface_next_vif_index(struct interface *ifp) | |
904 | { | |
905 | struct pim_interface *pim_ifp = ifp->info; | |
906 | struct pim_instance *pim = pim_ifp->pim; | |
907 | int i; | |
908 | ||
909 | /* | |
910 | * The pimreg vif is always going to be in index 0 | |
911 | * of the table. | |
912 | */ | |
913 | if (ifp->ifindex == PIM_OIF_PIM_REGISTER_VIF) | |
914 | return 0; | |
915 | ||
916 | for (i = 1; i < MAXVIFS; i++) { | |
917 | if (pim->iface_vif_index[i] == 0) | |
918 | return i; | |
919 | } | |
920 | return MAXVIFS; | |
921 | } | |
922 | ||
923 | /* | |
924 | pim_if_add_vif() uses ifindex as vif_index | |
925 | ||
926 | see also pim_if_find_vifindex_by_ifindex() | |
927 | */ | |
928 | int pim_if_add_vif(struct interface *ifp, bool ispimreg) | |
929 | { | |
930 | struct pim_interface *pim_ifp = ifp->info; | |
931 | struct in_addr ifaddr; | |
932 | unsigned char flags = 0; | |
933 | ||
934 | zassert(pim_ifp); | |
935 | ||
936 | if (pim_ifp->mroute_vif_index > 0) { | |
937 | zlog_warn("%s: vif_index=%d > 0 on interface %s ifindex=%d", | |
938 | __PRETTY_FUNCTION__, pim_ifp->mroute_vif_index, | |
939 | ifp->name, ifp->ifindex); | |
940 | return -1; | |
941 | } | |
942 | ||
943 | if (ifp->ifindex < 0) { | |
944 | zlog_warn("%s: ifindex=%d < 1 on interface %s", | |
945 | __PRETTY_FUNCTION__, ifp->ifindex, ifp->name); | |
946 | return -2; | |
947 | } | |
948 | ||
949 | ifaddr = pim_ifp->primary_address; | |
950 | if (!ispimreg && PIM_INADDR_IS_ANY(ifaddr)) { | |
951 | zlog_warn( | |
952 | "%s: could not get address for interface %s ifindex=%d", | |
953 | __PRETTY_FUNCTION__, ifp->name, ifp->ifindex); | |
954 | return -4; | |
955 | } | |
956 | ||
957 | pim_ifp->mroute_vif_index = pim_iface_next_vif_index(ifp); | |
958 | ||
959 | if (pim_ifp->mroute_vif_index >= MAXVIFS) { | |
960 | zlog_warn( | |
961 | "%s: Attempting to configure more than MAXVIFS=%d on pim enabled interface %s", | |
962 | __PRETTY_FUNCTION__, MAXVIFS, ifp->name); | |
963 | return -3; | |
964 | } | |
965 | ||
966 | if (ifp->ifindex == PIM_OIF_PIM_REGISTER_VIF) | |
967 | flags = VIFF_REGISTER; | |
968 | #ifdef VIFF_USE_IFINDEX | |
969 | else | |
970 | flags = VIFF_USE_IFINDEX; | |
971 | #endif | |
972 | ||
973 | if (pim_mroute_add_vif(ifp, ifaddr, flags)) { | |
974 | /* pim_mroute_add_vif reported error */ | |
975 | return -5; | |
976 | } | |
977 | ||
978 | pim_ifp->pim->iface_vif_index[pim_ifp->mroute_vif_index] = 1; | |
979 | return 0; | |
980 | } | |
981 | ||
982 | int pim_if_del_vif(struct interface *ifp) | |
983 | { | |
984 | struct pim_interface *pim_ifp = ifp->info; | |
985 | ||
986 | if (pim_ifp->mroute_vif_index < 1) { | |
987 | zlog_warn("%s: vif_index=%d < 1 on interface %s ifindex=%d", | |
988 | __PRETTY_FUNCTION__, pim_ifp->mroute_vif_index, | |
989 | ifp->name, ifp->ifindex); | |
990 | return -1; | |
991 | } | |
992 | ||
993 | pim_mroute_del_vif(ifp); | |
994 | ||
995 | /* | |
996 | Update vif_index | |
997 | */ | |
998 | pim_ifp->pim->iface_vif_index[pim_ifp->mroute_vif_index] = 0; | |
999 | ||
1000 | pim_ifp->mroute_vif_index = -1; | |
1001 | ||
1002 | return 0; | |
1003 | } | |
1004 | ||
1005 | // DBS - VRF Revist | |
1006 | struct interface *pim_if_find_by_vif_index(struct pim_instance *pim, | |
1007 | ifindex_t vif_index) | |
1008 | { | |
1009 | struct interface *ifp; | |
1010 | ||
1011 | FOR_ALL_INTERFACES (pim->vrf, ifp) { | |
1012 | if (ifp->info) { | |
1013 | struct pim_interface *pim_ifp; | |
1014 | pim_ifp = ifp->info; | |
1015 | ||
1016 | if (vif_index == pim_ifp->mroute_vif_index) | |
1017 | return ifp; | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | /* | |
1025 | pim_if_add_vif() uses ifindex as vif_index | |
1026 | */ | |
1027 | int pim_if_find_vifindex_by_ifindex(struct pim_instance *pim, ifindex_t ifindex) | |
1028 | { | |
1029 | struct pim_interface *pim_ifp; | |
1030 | struct interface *ifp; | |
1031 | ||
1032 | ifp = if_lookup_by_index(ifindex, pim->vrf_id); | |
1033 | if (!ifp || !ifp->info) | |
1034 | return -1; | |
1035 | pim_ifp = ifp->info; | |
1036 | ||
1037 | return pim_ifp->mroute_vif_index; | |
1038 | } | |
1039 | ||
1040 | int pim_if_lan_delay_enabled(struct interface *ifp) | |
1041 | { | |
1042 | struct pim_interface *pim_ifp; | |
1043 | ||
1044 | pim_ifp = ifp->info; | |
1045 | zassert(pim_ifp); | |
1046 | zassert(pim_ifp->pim_number_of_nonlandelay_neighbors >= 0); | |
1047 | ||
1048 | return pim_ifp->pim_number_of_nonlandelay_neighbors == 0; | |
1049 | } | |
1050 | ||
1051 | uint16_t pim_if_effective_propagation_delay_msec(struct interface *ifp) | |
1052 | { | |
1053 | if (pim_if_lan_delay_enabled(ifp)) { | |
1054 | struct pim_interface *pim_ifp; | |
1055 | pim_ifp = ifp->info; | |
1056 | return pim_ifp->pim_neighbors_highest_propagation_delay_msec; | |
1057 | } else { | |
1058 | return PIM_DEFAULT_PROPAGATION_DELAY_MSEC; | |
1059 | } | |
1060 | } | |
1061 | ||
1062 | uint16_t pim_if_effective_override_interval_msec(struct interface *ifp) | |
1063 | { | |
1064 | if (pim_if_lan_delay_enabled(ifp)) { | |
1065 | struct pim_interface *pim_ifp; | |
1066 | pim_ifp = ifp->info; | |
1067 | return pim_ifp->pim_neighbors_highest_override_interval_msec; | |
1068 | } else { | |
1069 | return PIM_DEFAULT_OVERRIDE_INTERVAL_MSEC; | |
1070 | } | |
1071 | } | |
1072 | ||
1073 | int pim_if_t_override_msec(struct interface *ifp) | |
1074 | { | |
1075 | int effective_override_interval_msec; | |
1076 | int t_override_msec; | |
1077 | ||
1078 | effective_override_interval_msec = | |
1079 | pim_if_effective_override_interval_msec(ifp); | |
1080 | ||
1081 | t_override_msec = random() % (effective_override_interval_msec + 1); | |
1082 | ||
1083 | return t_override_msec; | |
1084 | } | |
1085 | ||
1086 | uint16_t pim_if_jp_override_interval_msec(struct interface *ifp) | |
1087 | { | |
1088 | return pim_if_effective_propagation_delay_msec(ifp) | |
1089 | + pim_if_effective_override_interval_msec(ifp); | |
1090 | } | |
1091 | ||
1092 | /* | |
1093 | RFC 4601: 4.1.6. State Summarization Macros | |
1094 | ||
1095 | The function NBR( I, A ) uses information gathered through PIM Hello | |
1096 | messages to map the IP address A of a directly connected PIM | |
1097 | neighbor router on interface I to the primary IP address of the same | |
1098 | router (Section 4.3.4). The primary IP address of a neighbor is the | |
1099 | address that it uses as the source of its PIM Hello messages. | |
1100 | */ | |
1101 | struct pim_neighbor *pim_if_find_neighbor(struct interface *ifp, | |
1102 | struct in_addr addr) | |
1103 | { | |
1104 | struct listnode *neighnode; | |
1105 | struct pim_neighbor *neigh; | |
1106 | struct pim_interface *pim_ifp; | |
1107 | struct prefix p; | |
1108 | ||
1109 | zassert(ifp); | |
1110 | ||
1111 | pim_ifp = ifp->info; | |
1112 | if (!pim_ifp) { | |
1113 | zlog_warn("%s: multicast not enabled on interface %s", | |
1114 | __PRETTY_FUNCTION__, ifp->name); | |
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | p.family = AF_INET; | |
1119 | p.u.prefix4 = addr; | |
1120 | p.prefixlen = IPV4_MAX_PREFIXLEN; | |
1121 | ||
1122 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->pim_neighbor_list, neighnode, | |
1123 | neigh)) { | |
1124 | ||
1125 | /* primary address ? */ | |
1126 | if (neigh->source_addr.s_addr == addr.s_addr) | |
1127 | return neigh; | |
1128 | ||
1129 | /* secondary address ? */ | |
1130 | if (pim_neighbor_find_secondary(neigh, &p)) | |
1131 | return neigh; | |
1132 | } | |
1133 | ||
1134 | if (PIM_DEBUG_PIM_TRACE) { | |
1135 | char addr_str[INET_ADDRSTRLEN]; | |
1136 | pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str)); | |
1137 | zlog_debug( | |
1138 | "%s: neighbor not found for address %s on interface %s", | |
1139 | __PRETTY_FUNCTION__, addr_str, ifp->name); | |
1140 | } | |
1141 | ||
1142 | return NULL; | |
1143 | } | |
1144 | ||
1145 | long pim_if_t_suppressed_msec(struct interface *ifp) | |
1146 | { | |
1147 | struct pim_interface *pim_ifp; | |
1148 | long t_suppressed_msec; | |
1149 | uint32_t ramount = 0; | |
1150 | ||
1151 | pim_ifp = ifp->info; | |
1152 | zassert(pim_ifp); | |
1153 | ||
1154 | /* join suppression disabled ? */ | |
1155 | if (PIM_IF_TEST_PIM_CAN_DISABLE_JOIN_SUPRESSION(pim_ifp->options)) | |
1156 | return 0; | |
1157 | ||
1158 | /* t_suppressed = t_periodic * rand(1.1, 1.4) */ | |
1159 | ramount = 1100 + (random() % (1400 - 1100 + 1)); | |
1160 | t_suppressed_msec = qpim_t_periodic * ramount; | |
1161 | ||
1162 | return t_suppressed_msec; | |
1163 | } | |
1164 | ||
1165 | static void igmp_join_free(struct igmp_join *ij) | |
1166 | { | |
1167 | XFREE(MTYPE_PIM_IGMP_JOIN, ij); | |
1168 | } | |
1169 | ||
1170 | static struct igmp_join *igmp_join_find(struct list *join_list, | |
1171 | struct in_addr group_addr, | |
1172 | struct in_addr source_addr) | |
1173 | { | |
1174 | struct listnode *node; | |
1175 | struct igmp_join *ij; | |
1176 | ||
1177 | zassert(join_list); | |
1178 | ||
1179 | for (ALL_LIST_ELEMENTS_RO(join_list, node, ij)) { | |
1180 | if ((group_addr.s_addr == ij->group_addr.s_addr) | |
1181 | && (source_addr.s_addr == ij->source_addr.s_addr)) | |
1182 | return ij; | |
1183 | } | |
1184 | ||
1185 | return 0; | |
1186 | } | |
1187 | ||
1188 | static int igmp_join_sock(const char *ifname, ifindex_t ifindex, | |
1189 | struct in_addr group_addr, struct in_addr source_addr) | |
1190 | { | |
1191 | int join_fd; | |
1192 | ||
1193 | join_fd = pim_socket_raw(IPPROTO_IGMP); | |
1194 | if (join_fd < 0) { | |
1195 | return -1; | |
1196 | } | |
1197 | ||
1198 | if (pim_igmp_join_source(join_fd, ifindex, group_addr, source_addr)) { | |
1199 | char group_str[INET_ADDRSTRLEN]; | |
1200 | char source_str[INET_ADDRSTRLEN]; | |
1201 | pim_inet4_dump("<grp?>", group_addr, group_str, | |
1202 | sizeof(group_str)); | |
1203 | pim_inet4_dump("<src?>", source_addr, source_str, | |
1204 | sizeof(source_str)); | |
1205 | zlog_warn( | |
1206 | "%s: setsockopt(fd=%d) failure for IGMP group %s source %s ifindex %d on interface %s: errno=%d: %s", | |
1207 | __PRETTY_FUNCTION__, join_fd, group_str, source_str, | |
1208 | ifindex, ifname, errno, safe_strerror(errno)); | |
1209 | ||
1210 | close(join_fd); | |
1211 | return -2; | |
1212 | } | |
1213 | ||
1214 | return join_fd; | |
1215 | } | |
1216 | ||
1217 | static struct igmp_join *igmp_join_new(struct interface *ifp, | |
1218 | struct in_addr group_addr, | |
1219 | struct in_addr source_addr) | |
1220 | { | |
1221 | struct pim_interface *pim_ifp; | |
1222 | struct igmp_join *ij; | |
1223 | int join_fd; | |
1224 | ||
1225 | pim_ifp = ifp->info; | |
1226 | zassert(pim_ifp); | |
1227 | ||
1228 | join_fd = igmp_join_sock(ifp->name, ifp->ifindex, group_addr, | |
1229 | source_addr); | |
1230 | if (join_fd < 0) { | |
1231 | char group_str[INET_ADDRSTRLEN]; | |
1232 | char source_str[INET_ADDRSTRLEN]; | |
1233 | ||
1234 | pim_inet4_dump("<grp?>", group_addr, group_str, | |
1235 | sizeof(group_str)); | |
1236 | pim_inet4_dump("<src?>", source_addr, source_str, | |
1237 | sizeof(source_str)); | |
1238 | zlog_warn( | |
1239 | "%s: igmp_join_sock() failure for IGMP group %s source %s on interface %s", | |
1240 | __PRETTY_FUNCTION__, group_str, source_str, ifp->name); | |
1241 | return 0; | |
1242 | } | |
1243 | ||
1244 | ij = XCALLOC(MTYPE_PIM_IGMP_JOIN, sizeof(*ij)); | |
1245 | ||
1246 | ij->sock_fd = join_fd; | |
1247 | ij->group_addr = group_addr; | |
1248 | ij->source_addr = source_addr; | |
1249 | ij->sock_creation = pim_time_monotonic_sec(); | |
1250 | ||
1251 | listnode_add(pim_ifp->igmp_join_list, ij); | |
1252 | ||
1253 | return ij; | |
1254 | } | |
1255 | ||
1256 | ferr_r pim_if_igmp_join_add(struct interface *ifp, struct in_addr group_addr, | |
1257 | struct in_addr source_addr) | |
1258 | { | |
1259 | struct pim_interface *pim_ifp; | |
1260 | struct igmp_join *ij; | |
1261 | ||
1262 | pim_ifp = ifp->info; | |
1263 | if (!pim_ifp) { | |
1264 | return ferr_cfg_invalid("multicast not enabled on interface %s", | |
1265 | ifp->name); | |
1266 | } | |
1267 | ||
1268 | if (!pim_ifp->igmp_join_list) { | |
1269 | pim_ifp->igmp_join_list = list_new(); | |
1270 | pim_ifp->igmp_join_list->del = (void (*)(void *))igmp_join_free; | |
1271 | } | |
1272 | ||
1273 | ij = igmp_join_find(pim_ifp->igmp_join_list, group_addr, source_addr); | |
1274 | ||
1275 | /* This interface has already been configured to join this IGMP group | |
1276 | */ | |
1277 | if (ij) { | |
1278 | return ferr_ok(); | |
1279 | } | |
1280 | ||
1281 | ij = igmp_join_new(ifp, group_addr, source_addr); | |
1282 | if (!ij) { | |
1283 | return ferr_cfg_invalid( | |
1284 | "Failure to create new join data structure, see log file for more information"); | |
1285 | } | |
1286 | ||
1287 | if (PIM_DEBUG_IGMP_EVENTS) { | |
1288 | char group_str[INET_ADDRSTRLEN]; | |
1289 | char source_str[INET_ADDRSTRLEN]; | |
1290 | pim_inet4_dump("<grp?>", group_addr, group_str, | |
1291 | sizeof(group_str)); | |
1292 | pim_inet4_dump("<src?>", source_addr, source_str, | |
1293 | sizeof(source_str)); | |
1294 | zlog_debug( | |
1295 | "%s: issued static igmp join for channel (S,G)=(%s,%s) on interface %s", | |
1296 | __PRETTY_FUNCTION__, source_str, group_str, ifp->name); | |
1297 | } | |
1298 | ||
1299 | return ferr_ok(); | |
1300 | } | |
1301 | ||
1302 | ||
1303 | int pim_if_igmp_join_del(struct interface *ifp, struct in_addr group_addr, | |
1304 | struct in_addr source_addr) | |
1305 | { | |
1306 | struct pim_interface *pim_ifp; | |
1307 | struct igmp_join *ij; | |
1308 | ||
1309 | pim_ifp = ifp->info; | |
1310 | if (!pim_ifp) { | |
1311 | zlog_warn("%s: multicast not enabled on interface %s", | |
1312 | __PRETTY_FUNCTION__, ifp->name); | |
1313 | return -1; | |
1314 | } | |
1315 | ||
1316 | if (!pim_ifp->igmp_join_list) { | |
1317 | zlog_warn("%s: no IGMP join on interface %s", | |
1318 | __PRETTY_FUNCTION__, ifp->name); | |
1319 | return -2; | |
1320 | } | |
1321 | ||
1322 | ij = igmp_join_find(pim_ifp->igmp_join_list, group_addr, source_addr); | |
1323 | if (!ij) { | |
1324 | char group_str[INET_ADDRSTRLEN]; | |
1325 | char source_str[INET_ADDRSTRLEN]; | |
1326 | pim_inet4_dump("<grp?>", group_addr, group_str, | |
1327 | sizeof(group_str)); | |
1328 | pim_inet4_dump("<src?>", source_addr, source_str, | |
1329 | sizeof(source_str)); | |
1330 | zlog_warn( | |
1331 | "%s: could not find IGMP group %s source %s on interface %s", | |
1332 | __PRETTY_FUNCTION__, group_str, source_str, ifp->name); | |
1333 | return -3; | |
1334 | } | |
1335 | ||
1336 | if (close(ij->sock_fd)) { | |
1337 | char group_str[INET_ADDRSTRLEN]; | |
1338 | char source_str[INET_ADDRSTRLEN]; | |
1339 | pim_inet4_dump("<grp?>", group_addr, group_str, | |
1340 | sizeof(group_str)); | |
1341 | pim_inet4_dump("<src?>", source_addr, source_str, | |
1342 | sizeof(source_str)); | |
1343 | zlog_warn( | |
1344 | "%s: failure closing sock_fd=%d for IGMP group %s source %s on interface %s: errno=%d: %s", | |
1345 | __PRETTY_FUNCTION__, ij->sock_fd, group_str, source_str, | |
1346 | ifp->name, errno, safe_strerror(errno)); | |
1347 | /* warning only */ | |
1348 | } | |
1349 | listnode_delete(pim_ifp->igmp_join_list, ij); | |
1350 | igmp_join_free(ij); | |
1351 | if (listcount(pim_ifp->igmp_join_list) < 1) { | |
1352 | list_delete_and_null(&pim_ifp->igmp_join_list); | |
1353 | pim_ifp->igmp_join_list = 0; | |
1354 | } | |
1355 | ||
1356 | return 0; | |
1357 | } | |
1358 | ||
1359 | static void pim_if_igmp_join_del_all(struct interface *ifp) | |
1360 | { | |
1361 | struct pim_interface *pim_ifp; | |
1362 | struct listnode *node; | |
1363 | struct listnode *nextnode; | |
1364 | struct igmp_join *ij; | |
1365 | ||
1366 | pim_ifp = ifp->info; | |
1367 | if (!pim_ifp) { | |
1368 | zlog_warn("%s: multicast not enabled on interface %s", | |
1369 | __PRETTY_FUNCTION__, ifp->name); | |
1370 | return; | |
1371 | } | |
1372 | ||
1373 | if (!pim_ifp->igmp_join_list) | |
1374 | return; | |
1375 | ||
1376 | for (ALL_LIST_ELEMENTS(pim_ifp->igmp_join_list, node, nextnode, ij)) | |
1377 | pim_if_igmp_join_del(ifp, ij->group_addr, ij->source_addr); | |
1378 | } | |
1379 | ||
1380 | /* | |
1381 | RFC 4601 | |
1382 | ||
1383 | Transitions from "I am Assert Loser" State | |
1384 | ||
1385 | Current Winner's GenID Changes or NLT Expires | |
1386 | ||
1387 | The Neighbor Liveness Timer associated with the current winner | |
1388 | expires or we receive a Hello message from the current winner | |
1389 | reporting a different GenID from the one it previously reported. | |
1390 | This indicates that the current winner's interface or router has | |
1391 | gone down (and may have come back up), and so we must assume it no | |
1392 | longer knows it was the winner. | |
1393 | */ | |
1394 | void pim_if_assert_on_neighbor_down(struct interface *ifp, | |
1395 | struct in_addr neigh_addr) | |
1396 | { | |
1397 | struct pim_interface *pim_ifp; | |
1398 | struct pim_ifchannel *ch; | |
1399 | ||
1400 | pim_ifp = ifp->info; | |
1401 | zassert(pim_ifp); | |
1402 | ||
1403 | RB_FOREACH (ch, pim_ifchannel_rb, &pim_ifp->ifchannel_rb) { | |
1404 | /* Is (S,G,I) assert loser ? */ | |
1405 | if (ch->ifassert_state != PIM_IFASSERT_I_AM_LOSER) | |
1406 | continue; | |
1407 | /* Dead neighbor was winner ? */ | |
1408 | if (ch->ifassert_winner.s_addr != neigh_addr.s_addr) | |
1409 | continue; | |
1410 | ||
1411 | assert_action_a5(ch); | |
1412 | } | |
1413 | } | |
1414 | ||
1415 | void pim_if_update_join_desired(struct pim_interface *pim_ifp) | |
1416 | { | |
1417 | struct pim_ifchannel *ch; | |
1418 | ||
1419 | /* clear off flag from interface's upstreams */ | |
1420 | RB_FOREACH (ch, pim_ifchannel_rb, &pim_ifp->ifchannel_rb) { | |
1421 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED_UPDATED( | |
1422 | ch->upstream->flags); | |
1423 | } | |
1424 | ||
1425 | /* scan per-interface (S,G,I) state on this I interface */ | |
1426 | RB_FOREACH (ch, pim_ifchannel_rb, &pim_ifp->ifchannel_rb) { | |
1427 | struct pim_upstream *up = ch->upstream; | |
1428 | ||
1429 | if (PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED_UPDATED(up->flags)) | |
1430 | continue; | |
1431 | ||
1432 | /* update join_desired for the global (S,G) state */ | |
1433 | pim_upstream_update_join_desired(pim_ifp->pim, up); | |
1434 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED_UPDATED(up->flags); | |
1435 | } | |
1436 | } | |
1437 | ||
1438 | void pim_if_update_assert_tracking_desired(struct interface *ifp) | |
1439 | { | |
1440 | struct pim_interface *pim_ifp; | |
1441 | struct pim_ifchannel *ch; | |
1442 | ||
1443 | pim_ifp = ifp->info; | |
1444 | if (!pim_ifp) | |
1445 | return; | |
1446 | ||
1447 | RB_FOREACH (ch, pim_ifchannel_rb, &pim_ifp->ifchannel_rb) { | |
1448 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1449 | } | |
1450 | } | |
1451 | ||
1452 | /* | |
1453 | * PIM wants to have an interface pointer for everything it does. | |
1454 | * The pimreg is a special interface that we have that is not | |
1455 | * quite an inteface but a VIF is created for it. | |
1456 | */ | |
1457 | void pim_if_create_pimreg(struct pim_instance *pim) | |
1458 | { | |
1459 | char pimreg_name[INTERFACE_NAMSIZ]; | |
1460 | ||
1461 | if (!pim->regiface) { | |
1462 | if (pim->vrf_id == VRF_DEFAULT) | |
1463 | strlcpy(pimreg_name, "pimreg", sizeof(pimreg_name)); | |
1464 | else | |
1465 | snprintf(pimreg_name, sizeof(pimreg_name), "pimreg%u", | |
1466 | pim->vrf->data.l.table_id); | |
1467 | ||
1468 | pim->regiface = if_create(pimreg_name, pim->vrf_id); | |
1469 | pim->regiface->ifindex = PIM_OIF_PIM_REGISTER_VIF; | |
1470 | ||
1471 | pim_if_new(pim->regiface, false, false, true); | |
1472 | } | |
1473 | } | |
1474 | ||
1475 | int pim_if_connected_to_source(struct interface *ifp, struct in_addr src) | |
1476 | { | |
1477 | struct listnode *cnode; | |
1478 | struct connected *c; | |
1479 | struct prefix p; | |
1480 | ||
1481 | if (!ifp) | |
1482 | return 0; | |
1483 | ||
1484 | p.family = AF_INET; | |
1485 | p.u.prefix4 = src; | |
1486 | p.prefixlen = IPV4_MAX_BITLEN; | |
1487 | ||
1488 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, c)) { | |
1489 | if ((c->address->family == AF_INET) | |
1490 | && prefix_match(CONNECTED_PREFIX(c), &p)) { | |
1491 | return 1; | |
1492 | } | |
1493 | } | |
1494 | ||
1495 | return 0; | |
1496 | } | |
1497 | ||
1498 | bool pim_if_is_vrf_device(struct interface *ifp) | |
1499 | { | |
1500 | if (if_is_vrf(ifp)) | |
1501 | return true; | |
1502 | ||
1503 | return false; | |
1504 | } | |
1505 | ||
1506 | int pim_if_ifchannel_count(struct pim_interface *pim_ifp) | |
1507 | { | |
1508 | struct pim_ifchannel *ch; | |
1509 | int count = 0; | |
1510 | ||
1511 | RB_FOREACH (ch, pim_ifchannel_rb, &pim_ifp->ifchannel_rb) { | |
1512 | count++; | |
1513 | } | |
1514 | ||
1515 | return count; | |
1516 | } |