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12e41d03 DL |
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 | |
15 | along with this program; see the file COPYING; if not, write to the | |
16 | Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, | |
17 | MA 02110-1301 USA | |
12e41d03 DL |
18 | */ |
19 | ||
20 | #include <zebra.h> | |
21 | ||
22 | #include "if.h" | |
23 | #include "log.h" | |
24 | #include "vty.h" | |
25 | #include "memory.h" | |
26 | #include "prefix.h" | |
469351b3 | 27 | #include "vrf.h" |
9f0edbc9 | 28 | #include "linklist.h" |
7176984f | 29 | #include "plist.h" |
12e41d03 DL |
30 | |
31 | #include "pimd.h" | |
32 | #include "pim_iface.h" | |
33 | #include "pim_igmp.h" | |
34 | #include "pim_mroute.h" | |
35 | #include "pim_oil.h" | |
36 | #include "pim_str.h" | |
37 | #include "pim_pim.h" | |
38 | #include "pim_neighbor.h" | |
39 | #include "pim_ifchannel.h" | |
12e41d03 DL |
40 | #include "pim_sock.h" |
41 | #include "pim_time.h" | |
42 | #include "pim_ssmpingd.h" | |
7176984f | 43 | #include "pim_rp.h" |
12e41d03 | 44 | |
c992c9a0 | 45 | struct interface *pim_regiface = NULL; |
ea4a71fc | 46 | struct list *pim_ifchannel_list = NULL; |
dc0665f1 | 47 | static int pim_iface_vif_index[MAXVIFS]; |
c992c9a0 | 48 | |
12e41d03 DL |
49 | static void pim_if_igmp_join_del_all(struct interface *ifp); |
50 | ||
ea4a71fc DS |
51 | void |
52 | pim_if_init (void) | |
53 | { | |
dc0665f1 DS |
54 | int i; |
55 | ||
56 | for (i = 0; i < MAXVIFS; i++) | |
57 | pim_iface_vif_index[i] = 0; | |
58 | ||
ea4a71fc DS |
59 | vrf_iflist_create(VRF_DEFAULT); |
60 | pim_ifchannel_list = list_new(); | |
61 | pim_ifchannel_list->cmp = (int (*)(void *, void *))pim_ifchannel_compare; | |
62 | } | |
63 | ||
64 | void | |
65 | pim_if_terminate (void) | |
66 | { | |
67 | if (pim_ifchannel_list) | |
68 | list_free (pim_ifchannel_list); | |
69 | } | |
70 | ||
71 | static void *if_list_clean(struct pim_interface *pim_ifp) | |
72 | { | |
73 | if (pim_ifp->igmp_join_list) { | |
74 | list_delete(pim_ifp->igmp_join_list); | |
75 | } | |
76 | ||
77 | if (pim_ifp->igmp_socket_list) { | |
78 | list_delete(pim_ifp->igmp_socket_list); | |
79 | } | |
80 | ||
81 | if (pim_ifp->pim_neighbor_list) { | |
82 | list_delete(pim_ifp->pim_neighbor_list); | |
83 | } | |
84 | ||
85 | if (pim_ifp->pim_ifchannel_list) { | |
86 | list_delete(pim_ifp->pim_ifchannel_list); | |
87 | } | |
88 | ||
89 | XFREE(MTYPE_PIM_INTERFACE, pim_ifp); | |
90 | ||
91 | return 0; | |
92 | } | |
93 | ||
12e41d03 DL |
94 | struct pim_interface *pim_if_new(struct interface *ifp, int igmp, int pim) |
95 | { | |
96 | struct pim_interface *pim_ifp; | |
97 | ||
98 | zassert(ifp); | |
99 | zassert(!ifp->info); | |
100 | ||
36d9e7dc | 101 | pim_ifp = XCALLOC(MTYPE_PIM_INTERFACE, sizeof(*pim_ifp)); |
12e41d03 | 102 | if (!pim_ifp) { |
36d9e7dc | 103 | zlog_err("PIM XCALLOC(%zu) failure", sizeof(*pim_ifp)); |
12e41d03 DL |
104 | return 0; |
105 | } | |
106 | ||
107 | pim_ifp->options = 0; | |
108 | pim_ifp->mroute_vif_index = -1; | |
109 | ||
b05b72e8 | 110 | pim_ifp->igmp_version = IGMP_DEFAULT_VERSION; |
12e41d03 DL |
111 | pim_ifp->igmp_default_robustness_variable = IGMP_DEFAULT_ROBUSTNESS_VARIABLE; |
112 | pim_ifp->igmp_default_query_interval = IGMP_GENERAL_QUERY_INTERVAL; | |
113 | pim_ifp->igmp_query_max_response_time_dsec = IGMP_QUERY_MAX_RESPONSE_TIME_DSEC; | |
114 | pim_ifp->igmp_specific_query_max_response_time_dsec = IGMP_SPECIFIC_QUERY_MAX_RESPONSE_TIME_DSEC; | |
115 | ||
116 | /* | |
117 | RFC 3376: 8.3. Query Response Interval | |
118 | The number of seconds represented by the [Query Response Interval] | |
119 | must be less than the [Query Interval]. | |
120 | */ | |
121 | zassert(pim_ifp->igmp_query_max_response_time_dsec < pim_ifp->igmp_default_query_interval); | |
122 | ||
123 | if (pim) | |
124 | PIM_IF_DO_PIM(pim_ifp->options); | |
125 | if (igmp) | |
126 | PIM_IF_DO_IGMP(pim_ifp->options); | |
127 | ||
12e41d03 | 128 | PIM_IF_DO_IGMP_LISTEN_ALLROUTERS(pim_ifp->options); |
12e41d03 | 129 | |
59ba0ac3 DS |
130 | pim_ifp->igmp_join_list = NULL; |
131 | pim_ifp->igmp_socket_list = NULL; | |
132 | pim_ifp->pim_neighbor_list = NULL; | |
133 | pim_ifp->pim_ifchannel_list = NULL; | |
e4cc0185 | 134 | pim_ifp->pim_generation_id = 0; |
12e41d03 DL |
135 | |
136 | /* list of struct igmp_sock */ | |
137 | pim_ifp->igmp_socket_list = list_new(); | |
138 | if (!pim_ifp->igmp_socket_list) { | |
139 | zlog_err("%s %s: failure: igmp_socket_list=list_new()", | |
140 | __FILE__, __PRETTY_FUNCTION__); | |
141 | return if_list_clean(pim_ifp); | |
142 | } | |
143 | pim_ifp->igmp_socket_list->del = (void (*)(void *)) igmp_sock_free; | |
144 | ||
145 | /* list of struct pim_neighbor */ | |
146 | pim_ifp->pim_neighbor_list = list_new(); | |
147 | if (!pim_ifp->pim_neighbor_list) { | |
148 | zlog_err("%s %s: failure: pim_neighbor_list=list_new()", | |
149 | __FILE__, __PRETTY_FUNCTION__); | |
150 | return if_list_clean(pim_ifp); | |
151 | } | |
152 | pim_ifp->pim_neighbor_list->del = (void (*)(void *)) pim_neighbor_free; | |
153 | ||
154 | /* list of struct pim_ifchannel */ | |
155 | pim_ifp->pim_ifchannel_list = list_new(); | |
156 | if (!pim_ifp->pim_ifchannel_list) { | |
157 | zlog_err("%s %s: failure: pim_ifchannel_list=list_new()", | |
158 | __FILE__, __PRETTY_FUNCTION__); | |
159 | return if_list_clean(pim_ifp); | |
160 | } | |
161 | pim_ifp->pim_ifchannel_list->del = (void (*)(void *)) pim_ifchannel_free; | |
bbd64ce1 | 162 | pim_ifp->pim_ifchannel_list->cmp = (int (*)(void *, void *)) pim_ifchannel_compare; |
12e41d03 DL |
163 | |
164 | ifp->info = pim_ifp; | |
165 | ||
166 | pim_sock_reset(ifp); | |
167 | ||
12e41d03 DL |
168 | if (PIM_MROUTE_IS_ENABLED) { |
169 | pim_if_add_vif(ifp); | |
170 | } | |
171 | ||
172 | return pim_ifp; | |
173 | } | |
174 | ||
175 | void pim_if_delete(struct interface *ifp) | |
176 | { | |
177 | struct pim_interface *pim_ifp; | |
178 | ||
179 | zassert(ifp); | |
180 | pim_ifp = ifp->info; | |
181 | zassert(pim_ifp); | |
182 | ||
183 | if (pim_ifp->igmp_join_list) { | |
184 | pim_if_igmp_join_del_all(ifp); | |
185 | } | |
12e41d03 | 186 | |
cb24fec4 DS |
187 | pim_ifchannel_delete_all (ifp); |
188 | igmp_sock_delete_all (ifp); | |
12e41d03 | 189 | |
cb24fec4 | 190 | pim_neighbor_delete_all (ifp, "Interface removed from configuration"); |
12e41d03 DL |
191 | |
192 | if (PIM_MROUTE_IS_ENABLED) { | |
193 | pim_if_del_vif(ifp); | |
194 | } | |
195 | ||
196 | list_delete(pim_ifp->igmp_socket_list); | |
197 | list_delete(pim_ifp->pim_neighbor_list); | |
198 | list_delete(pim_ifp->pim_ifchannel_list); | |
199 | ||
200 | XFREE(MTYPE_PIM_INTERFACE, pim_ifp); | |
201 | ||
59ba0ac3 | 202 | ifp->info = NULL; |
12e41d03 DL |
203 | } |
204 | ||
205 | void pim_if_update_could_assert(struct interface *ifp) | |
206 | { | |
207 | struct pim_interface *pim_ifp; | |
208 | struct listnode *node; | |
209 | struct listnode *next_node; | |
210 | struct pim_ifchannel *ch; | |
211 | ||
212 | pim_ifp = ifp->info; | |
213 | zassert(pim_ifp); | |
214 | ||
215 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, node, next_node, ch)) { | |
216 | pim_ifchannel_update_could_assert(ch); | |
217 | } | |
218 | } | |
219 | ||
220 | static void pim_if_update_my_assert_metric(struct interface *ifp) | |
221 | { | |
222 | struct pim_interface *pim_ifp; | |
223 | struct listnode *node; | |
224 | struct listnode *next_node; | |
225 | struct pim_ifchannel *ch; | |
226 | ||
227 | pim_ifp = ifp->info; | |
228 | zassert(pim_ifp); | |
229 | ||
230 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, node, next_node, ch)) { | |
231 | pim_ifchannel_update_my_assert_metric(ch); | |
232 | } | |
233 | } | |
234 | ||
235 | static void pim_addr_change(struct interface *ifp) | |
236 | { | |
237 | struct pim_interface *pim_ifp; | |
238 | ||
239 | pim_ifp = ifp->info; | |
240 | zassert(pim_ifp); | |
241 | ||
242 | pim_if_dr_election(ifp); /* router's own DR Priority (addr) changes -- Done TODO T30 */ | |
243 | pim_if_update_join_desired(pim_ifp); /* depends on DR */ | |
244 | pim_if_update_could_assert(ifp); /* depends on DR */ | |
245 | pim_if_update_my_assert_metric(ifp); /* depends on could_assert */ | |
246 | pim_if_update_assert_tracking_desired(ifp); /* depends on DR, join_desired */ | |
247 | ||
248 | /* | |
249 | RFC 4601: 4.3.1. Sending Hello Messages | |
250 | ||
251 | 1) Before an interface goes down or changes primary IP address, a | |
252 | Hello message with a zero HoldTime should be sent immediately | |
253 | (with the old IP address if the IP address changed). | |
254 | -- FIXME See CAVEAT C13 | |
255 | ||
256 | 2) After an interface has changed its IP address, it MUST send a | |
257 | Hello message with its new IP address. | |
258 | -- DONE below | |
259 | ||
260 | 3) If an interface changes one of its secondary IP addresses, a | |
261 | Hello message with an updated Address_List option and a non-zero | |
262 | HoldTime should be sent immediately. | |
263 | -- FIXME See TODO T31 | |
264 | */ | |
265 | pim_ifp->pim_ifstat_hello_sent = 0; /* reset hello counter */ | |
266 | if (pim_ifp->pim_sock_fd < 0) | |
267 | return; | |
268 | pim_hello_restart_now(ifp); /* send hello and restart timer */ | |
269 | } | |
270 | ||
12e41d03 DL |
271 | static int detect_primary_address_change(struct interface *ifp, |
272 | int force_prim_as_any, | |
273 | const char *caller) | |
274 | { | |
4763cd0e | 275 | struct pim_interface *pim_ifp = ifp->info; |
12e41d03 DL |
276 | struct in_addr new_prim_addr; |
277 | int changed; | |
278 | ||
12e41d03 DL |
279 | if (force_prim_as_any) |
280 | new_prim_addr = qpim_inaddr_any; | |
281 | else | |
282 | new_prim_addr = pim_find_primary_addr(ifp); | |
283 | ||
284 | changed = new_prim_addr.s_addr != pim_ifp->primary_address.s_addr; | |
285 | ||
286 | if (PIM_DEBUG_ZEBRA) { | |
eaa54bdb DW |
287 | char new_prim_str[INET_ADDRSTRLEN]; |
288 | char old_prim_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
289 | pim_inet4_dump("<new?>", new_prim_addr, new_prim_str, sizeof(new_prim_str)); |
290 | pim_inet4_dump("<old?>", pim_ifp->primary_address, old_prim_str, sizeof(old_prim_str)); | |
291 | zlog_debug("%s: old=%s new=%s on interface %s: %s", | |
292 | __PRETTY_FUNCTION__, | |
293 | old_prim_str, new_prim_str, ifp->name, | |
294 | changed ? "changed" : "unchanged"); | |
295 | } | |
296 | ||
297 | if (changed) { | |
12e41d03 | 298 | pim_ifp->primary_address = new_prim_addr; |
12e41d03 DL |
299 | } |
300 | ||
301 | return changed; | |
302 | } | |
303 | ||
7176984f | 304 | static int pim_sec_addr_comp(const void *p1, const void *p2) |
305 | { | |
306 | const struct pim_secondary_addr *sec1 = p1; | |
307 | const struct pim_secondary_addr *sec2 = p2; | |
308 | ||
309 | if (ntohl(sec1->addr.s_addr) < ntohl(sec2->addr.s_addr)) | |
310 | return -1; | |
311 | ||
312 | if (ntohl(sec1->addr.s_addr) > ntohl(sec2->addr.s_addr)) | |
313 | return 1; | |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
318 | static void pim_sec_addr_free(struct pim_secondary_addr *sec_addr) | |
319 | { | |
320 | XFREE(MTYPE_PIM_SEC_ADDR, sec_addr); | |
321 | } | |
322 | ||
323 | static struct pim_secondary_addr * | |
324 | pim_sec_addr_find(struct pim_interface *pim_ifp, struct in_addr addr) | |
325 | { | |
326 | struct pim_secondary_addr *sec_addr; | |
327 | struct listnode *node; | |
328 | ||
329 | if (!pim_ifp->sec_addr_list) { | |
330 | return NULL; | |
331 | } | |
332 | ||
333 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->sec_addr_list, node, sec_addr)) { | |
334 | if (sec_addr->addr.s_addr == addr.s_addr) { | |
335 | return sec_addr; | |
336 | } | |
337 | } | |
338 | ||
339 | return NULL; | |
340 | } | |
341 | ||
342 | static void pim_sec_addr_del(struct pim_interface *pim_ifp, | |
343 | struct pim_secondary_addr *sec_addr) | |
344 | { | |
345 | listnode_delete(pim_ifp->sec_addr_list, sec_addr); | |
346 | pim_sec_addr_free(sec_addr); | |
347 | } | |
348 | ||
349 | static int pim_sec_addr_add(struct pim_interface *pim_ifp, struct in_addr addr) | |
350 | { | |
351 | int changed = 0; | |
352 | struct pim_secondary_addr *sec_addr; | |
353 | ||
354 | sec_addr = pim_sec_addr_find(pim_ifp, addr); | |
355 | if (sec_addr) { | |
356 | sec_addr->flags &= ~PIM_SEC_ADDRF_STALE; | |
357 | return changed; | |
358 | } | |
359 | ||
360 | if (!pim_ifp->sec_addr_list) { | |
361 | pim_ifp->sec_addr_list = list_new(); | |
362 | pim_ifp->sec_addr_list->del = (void (*)(void *))pim_sec_addr_free; | |
363 | pim_ifp->sec_addr_list->cmp = (int (*)(void *, void *))pim_sec_addr_comp; | |
364 | } | |
365 | ||
366 | sec_addr = XCALLOC(MTYPE_PIM_SEC_ADDR, sizeof(*sec_addr)); | |
367 | if (!sec_addr) { | |
368 | if (list_isempty(pim_ifp->sec_addr_list)) { | |
369 | list_free(pim_ifp->sec_addr_list); | |
370 | pim_ifp->sec_addr_list = NULL; | |
371 | } | |
372 | return changed; | |
373 | } | |
374 | ||
375 | changed = 1; | |
376 | sec_addr->addr = addr; | |
377 | listnode_add_sort(pim_ifp->sec_addr_list, sec_addr); | |
378 | ||
379 | return changed; | |
380 | } | |
381 | ||
382 | static int pim_sec_addr_del_all(struct pim_interface *pim_ifp) | |
383 | { | |
384 | int changed = 0; | |
385 | ||
386 | if (!pim_ifp->sec_addr_list) { | |
387 | return changed; | |
388 | } | |
389 | if (!list_isempty(pim_ifp->sec_addr_list)) { | |
390 | changed = 1; | |
391 | /* remove all nodes and free up the list itself */ | |
392 | list_delete_all_node(pim_ifp->sec_addr_list); | |
393 | list_free(pim_ifp->sec_addr_list); | |
394 | pim_ifp->sec_addr_list = NULL; | |
395 | } | |
396 | ||
397 | return changed; | |
398 | } | |
399 | ||
400 | static int pim_sec_addr_update(struct interface *ifp) | |
401 | { | |
402 | struct pim_interface *pim_ifp = ifp->info; | |
403 | struct connected *ifc; | |
404 | struct listnode *node; | |
405 | struct listnode *nextnode; | |
406 | struct pim_secondary_addr *sec_addr; | |
407 | int changed = 0; | |
408 | ||
409 | if (pim_ifp->sec_addr_list) { | |
410 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->sec_addr_list, node, sec_addr)) { | |
411 | sec_addr->flags |= PIM_SEC_ADDRF_STALE; | |
412 | } | |
413 | } | |
414 | ||
415 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) { | |
416 | struct prefix *p = ifc->address; | |
417 | ||
418 | if (p->family != AF_INET) { | |
419 | continue; | |
420 | } | |
421 | ||
422 | if (PIM_INADDR_IS_ANY(p->u.prefix4)) { | |
423 | continue; | |
424 | } | |
425 | ||
426 | if (pim_ifp->primary_address.s_addr == p->u.prefix4.s_addr) { | |
427 | /* don't add the primary address into the secondary address list */ | |
428 | continue; | |
429 | } | |
430 | ||
431 | if (pim_sec_addr_add(pim_ifp, p->u.prefix4)) { | |
432 | changed = 1; | |
433 | } | |
434 | } | |
435 | ||
436 | if (pim_ifp->sec_addr_list) { | |
437 | /* Drop stale entries */ | |
438 | for (ALL_LIST_ELEMENTS(pim_ifp->sec_addr_list, node, nextnode, sec_addr)) { | |
439 | if (sec_addr->flags & PIM_SEC_ADDRF_STALE) { | |
440 | pim_sec_addr_del(pim_ifp, sec_addr); | |
441 | changed = 1; | |
442 | } | |
443 | } | |
444 | ||
445 | /* If the list went empty free it up */ | |
446 | if (list_isempty(pim_ifp->sec_addr_list)) { | |
447 | list_free(pim_ifp->sec_addr_list); | |
448 | pim_ifp->sec_addr_list = NULL; | |
449 | } | |
450 | } | |
451 | ||
452 | return changed; | |
453 | } | |
454 | ||
4763cd0e | 455 | static int detect_secondary_address_change(struct interface *ifp, |
7176984f | 456 | int force_prim_as_any, |
12e41d03 DL |
457 | const char *caller) |
458 | { | |
4763cd0e | 459 | struct pim_interface *pim_ifp = ifp->info; |
7176984f | 460 | int changed = 0; |
12e41d03 | 461 | |
7176984f | 462 | if (force_prim_as_any) { |
463 | /* if primary address is being forced to zero just flush the | |
464 | * secondary address list */ | |
4763cd0e | 465 | changed = pim_sec_addr_del_all(pim_ifp); |
7176984f | 466 | } else { |
467 | /* re-evaluate the secondary address list */ | |
468 | changed = pim_sec_addr_update(ifp); | |
469 | } | |
470 | ||
4763cd0e | 471 | return changed; |
472 | } | |
473 | ||
474 | static void detect_address_change(struct interface *ifp, | |
475 | int force_prim_as_any, | |
476 | const char *caller) | |
477 | { | |
478 | int changed = 0; | |
479 | struct pim_interface *pim_ifp; | |
12e41d03 | 480 | |
4763cd0e | 481 | pim_ifp = ifp->info; |
482 | if (!pim_ifp) | |
12e41d03 | 483 | return; |
4763cd0e | 484 | |
485 | if (detect_primary_address_change(ifp, force_prim_as_any, caller)) { | |
486 | changed = 1; | |
12e41d03 DL |
487 | } |
488 | ||
4763cd0e | 489 | if (detect_secondary_address_change(ifp, force_prim_as_any, caller)) { |
490 | changed = 1; | |
491 | } | |
492 | ||
493 | ||
494 | if (changed) { | |
495 | if (!PIM_IF_TEST_PIM(pim_ifp->options)) { | |
496 | return; | |
497 | } | |
498 | ||
499 | pim_addr_change(ifp); | |
12e41d03 DL |
500 | } |
501 | ||
4763cd0e | 502 | /* XXX: if we have unnumbered interfaces we need to run detect address |
503 | * address change on all of them when the lo address changes */ | |
12e41d03 DL |
504 | } |
505 | ||
4763cd0e | 506 | int pim_update_source_set(struct interface *ifp, struct in_addr source) |
12e41d03 | 507 | { |
4763cd0e | 508 | struct pim_interface *pim_ifp = ifp->info; |
12e41d03 | 509 | |
4763cd0e | 510 | if (!pim_ifp) { |
511 | return PIM_IFACE_NOT_FOUND; | |
12e41d03 DL |
512 | } |
513 | ||
4763cd0e | 514 | if (pim_ifp->update_source.s_addr == source.s_addr) { |
515 | return PIM_UPDATE_SOURCE_DUP; | |
516 | } | |
517 | ||
518 | pim_ifp->update_source = source; | |
519 | detect_address_change(ifp, 0 /* force_prim_as_any */, | |
520 | __PRETTY_FUNCTION__); | |
521 | ||
522 | return PIM_SUCCESS; | |
12e41d03 DL |
523 | } |
524 | ||
525 | void pim_if_addr_add(struct connected *ifc) | |
526 | { | |
527 | struct pim_interface *pim_ifp; | |
528 | struct interface *ifp; | |
529 | struct in_addr ifaddr; | |
530 | ||
531 | zassert(ifc); | |
532 | ||
533 | ifp = ifc->ifp; | |
534 | zassert(ifp); | |
535 | pim_ifp = ifp->info; | |
536 | if (!pim_ifp) | |
537 | return; | |
538 | ||
539 | if (!if_is_operative(ifp)) | |
540 | return; | |
541 | ||
7adf0260 | 542 | if (PIM_DEBUG_ZEBRA) { |
12e41d03 DL |
543 | char buf[BUFSIZ]; |
544 | prefix2str(ifc->address, buf, BUFSIZ); | |
545 | zlog_debug("%s: %s ifindex=%d connected IP address %s %s", | |
546 | __PRETTY_FUNCTION__, | |
547 | ifp->name, ifp->ifindex, buf, | |
548 | CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY) ? | |
549 | "secondary" : "primary"); | |
550 | } | |
551 | ||
552 | ifaddr = ifc->address->u.prefix4; | |
553 | ||
554 | detect_address_change(ifp, 0, __PRETTY_FUNCTION__); | |
555 | ||
556 | if (PIM_IF_TEST_IGMP(pim_ifp->options)) { | |
557 | struct igmp_sock *igmp; | |
558 | ||
559 | /* lookup IGMP socket */ | |
560 | igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->igmp_socket_list, | |
561 | ifaddr); | |
562 | if (!igmp) { | |
563 | /* if addr new, add IGMP socket */ | |
564 | pim_igmp_sock_add(pim_ifp->igmp_socket_list, ifaddr, ifp); | |
565 | } | |
566 | } /* igmp */ | |
567 | ||
568 | if (PIM_IF_TEST_PIM(pim_ifp->options)) { | |
569 | ||
570 | /* Interface has a valid primary address ? */ | |
571 | if (PIM_INADDR_ISNOT_ANY(pim_ifp->primary_address)) { | |
572 | ||
573 | /* Interface has a valid socket ? */ | |
574 | if (pim_ifp->pim_sock_fd < 0) { | |
575 | if (pim_sock_add(ifp)) { | |
576 | zlog_warn("Failure creating PIM socket for interface %s", | |
577 | ifp->name); | |
578 | } | |
579 | } | |
580 | ||
581 | } | |
582 | } /* pim */ | |
583 | ||
584 | if (PIM_MROUTE_IS_ENABLED) { | |
585 | /* | |
586 | PIM or IGMP is enabled on interface, and there is at least one | |
587 | address assigned, then try to create a vif_index. | |
588 | */ | |
589 | if (pim_ifp->mroute_vif_index < 0) { | |
590 | pim_if_add_vif(ifp); | |
591 | } | |
c8507a16 | 592 | pim_ifchannel_scan_forward_start (ifp); |
12e41d03 DL |
593 | } |
594 | } | |
595 | ||
596 | static void pim_if_addr_del_igmp(struct connected *ifc) | |
597 | { | |
598 | struct pim_interface *pim_ifp = ifc->ifp->info; | |
599 | struct igmp_sock *igmp; | |
600 | struct in_addr ifaddr; | |
601 | ||
602 | if (ifc->address->family != AF_INET) { | |
603 | /* non-IPv4 address */ | |
604 | return; | |
605 | } | |
606 | ||
607 | if (!pim_ifp) { | |
608 | /* IGMP not enabled on interface */ | |
609 | return; | |
610 | } | |
611 | ||
612 | ifaddr = ifc->address->u.prefix4; | |
613 | ||
614 | /* lookup IGMP socket */ | |
615 | igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->igmp_socket_list, | |
616 | ifaddr); | |
617 | if (igmp) { | |
618 | /* if addr found, del IGMP socket */ | |
619 | igmp_sock_delete(igmp); | |
620 | } | |
621 | } | |
622 | ||
623 | static void pim_if_addr_del_pim(struct connected *ifc) | |
624 | { | |
625 | struct pim_interface *pim_ifp = ifc->ifp->info; | |
626 | ||
627 | if (ifc->address->family != AF_INET) { | |
628 | /* non-IPv4 address */ | |
629 | return; | |
630 | } | |
631 | ||
632 | if (!pim_ifp) { | |
633 | /* PIM not enabled on interface */ | |
634 | return; | |
635 | } | |
636 | ||
637 | if (PIM_INADDR_ISNOT_ANY(pim_ifp->primary_address)) { | |
638 | /* Interface keeps a valid primary address */ | |
639 | return; | |
640 | } | |
641 | ||
642 | if (pim_ifp->pim_sock_fd < 0) { | |
643 | /* Interface does not hold a valid socket any longer */ | |
644 | return; | |
645 | } | |
646 | ||
647 | /* | |
648 | pim_sock_delete() closes the socket, stops read and timer threads, | |
649 | and kills all neighbors. | |
650 | */ | |
651 | pim_sock_delete(ifc->ifp, "last address has been removed from interface"); | |
652 | } | |
653 | ||
654 | void pim_if_addr_del(struct connected *ifc, int force_prim_as_any) | |
655 | { | |
656 | struct interface *ifp; | |
657 | ||
658 | zassert(ifc); | |
659 | ifp = ifc->ifp; | |
660 | zassert(ifp); | |
661 | ||
7adf0260 | 662 | if (PIM_DEBUG_ZEBRA) { |
12e41d03 DL |
663 | char buf[BUFSIZ]; |
664 | prefix2str(ifc->address, buf, BUFSIZ); | |
665 | zlog_debug("%s: %s ifindex=%d disconnected IP address %s %s", | |
666 | __PRETTY_FUNCTION__, | |
667 | ifp->name, ifp->ifindex, buf, | |
668 | CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY) ? | |
669 | "secondary" : "primary"); | |
670 | } | |
671 | ||
672 | detect_address_change(ifp, force_prim_as_any, __PRETTY_FUNCTION__); | |
673 | ||
674 | pim_if_addr_del_igmp(ifc); | |
675 | pim_if_addr_del_pim(ifc); | |
676 | } | |
677 | ||
678 | void pim_if_addr_add_all(struct interface *ifp) | |
679 | { | |
680 | struct connected *ifc; | |
681 | struct listnode *node; | |
682 | struct listnode *nextnode; | |
d8424057 DS |
683 | int v4_addrs = 0; |
684 | int v6_addrs = 0; | |
7176984f | 685 | struct pim_interface *pim_ifp = ifp->info; |
686 | ||
12e41d03 DL |
687 | |
688 | /* PIM/IGMP enabled ? */ | |
7176984f | 689 | if (!pim_ifp) |
12e41d03 DL |
690 | return; |
691 | ||
692 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) { | |
693 | struct prefix *p = ifc->address; | |
694 | ||
695 | if (p->family != AF_INET) | |
d8424057 DS |
696 | { |
697 | v6_addrs++; | |
698 | continue; | |
699 | } | |
12e41d03 | 700 | |
d8424057 | 701 | v4_addrs++; |
12e41d03 DL |
702 | pim_if_addr_add(ifc); |
703 | } | |
d8424057 DS |
704 | |
705 | if (!v4_addrs && v6_addrs && !if_is_loopback (ifp)) | |
706 | { | |
7176984f | 707 | if (PIM_IF_TEST_PIM(pim_ifp->options)) { |
d8424057 DS |
708 | |
709 | /* Interface has a valid primary address ? */ | |
710 | if (PIM_INADDR_ISNOT_ANY(pim_ifp->primary_address)) { | |
711 | ||
712 | /* Interface has a valid socket ? */ | |
713 | if (pim_ifp->pim_sock_fd < 0) { | |
714 | if (pim_sock_add(ifp)) { | |
715 | zlog_warn("Failure creating PIM socket for interface %s", | |
716 | ifp->name); | |
717 | } | |
718 | } | |
719 | ||
720 | } | |
721 | } /* pim */ | |
722 | } | |
ef71d1f8 DS |
723 | if (PIM_MROUTE_IS_ENABLED) { |
724 | /* | |
725 | * PIM or IGMP is enabled on interface, and there is at least one | |
726 | * address assigned, then try to create a vif_index. | |
727 | */ | |
728 | if (pim_ifp->mroute_vif_index < 0) { | |
729 | pim_if_add_vif(ifp); | |
730 | } | |
731 | pim_ifchannel_scan_forward_start (ifp); | |
732 | } | |
733 | ||
da3dcffb | 734 | pim_rp_setup(); |
7176984f | 735 | pim_rp_check_on_if_add(pim_ifp); |
12e41d03 DL |
736 | } |
737 | ||
738 | void pim_if_addr_del_all(struct interface *ifp) | |
739 | { | |
740 | struct connected *ifc; | |
741 | struct listnode *node; | |
742 | struct listnode *nextnode; | |
743 | ||
744 | /* PIM/IGMP enabled ? */ | |
745 | if (!ifp->info) | |
746 | return; | |
747 | ||
748 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) { | |
749 | struct prefix *p = ifc->address; | |
750 | ||
751 | if (p->family != AF_INET) | |
752 | continue; | |
753 | ||
754 | pim_if_addr_del(ifc, 1 /* force_prim_as_any=true */); | |
755 | } | |
da3dcffb DS |
756 | |
757 | pim_rp_setup(); | |
7176984f | 758 | pim_i_am_rp_re_evaluate(); |
12e41d03 DL |
759 | } |
760 | ||
761 | void pim_if_addr_del_all_igmp(struct interface *ifp) | |
762 | { | |
763 | struct connected *ifc; | |
764 | struct listnode *node; | |
765 | struct listnode *nextnode; | |
766 | ||
767 | /* PIM/IGMP enabled ? */ | |
768 | if (!ifp->info) | |
769 | return; | |
770 | ||
771 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) { | |
772 | struct prefix *p = ifc->address; | |
773 | ||
774 | if (p->family != AF_INET) | |
775 | continue; | |
776 | ||
777 | pim_if_addr_del_igmp(ifc); | |
778 | } | |
779 | } | |
780 | ||
781 | void pim_if_addr_del_all_pim(struct interface *ifp) | |
782 | { | |
783 | struct connected *ifc; | |
784 | struct listnode *node; | |
785 | struct listnode *nextnode; | |
786 | ||
787 | /* PIM/IGMP enabled ? */ | |
788 | if (!ifp->info) | |
789 | return; | |
790 | ||
791 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) { | |
792 | struct prefix *p = ifc->address; | |
793 | ||
794 | if (p->family != AF_INET) | |
795 | continue; | |
796 | ||
797 | pim_if_addr_del_pim(ifc); | |
798 | } | |
799 | } | |
800 | ||
89f1d91e DS |
801 | struct in_addr |
802 | pim_find_primary_addr (struct interface *ifp) | |
12e41d03 DL |
803 | { |
804 | struct connected *ifc; | |
805 | struct listnode *node; | |
806 | struct in_addr addr; | |
d8424057 DS |
807 | int v4_addrs = 0; |
808 | int v6_addrs = 0; | |
4763cd0e | 809 | struct pim_interface *pim_ifp = ifp->info; |
810 | ||
811 | if (pim_ifp && PIM_INADDR_ISNOT_ANY(pim_ifp->update_source)) { | |
812 | return pim_ifp->update_source; | |
813 | } | |
12e41d03 DL |
814 | |
815 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) { | |
816 | struct prefix *p = ifc->address; | |
d8424057 | 817 | |
12e41d03 | 818 | if (p->family != AF_INET) |
d8424057 DS |
819 | { |
820 | v6_addrs++; | |
821 | continue; | |
822 | } | |
12e41d03 DL |
823 | |
824 | if (PIM_INADDR_IS_ANY(p->u.prefix4)) { | |
825 | zlog_warn("%s: null IPv4 address connected to interface %s", | |
826 | __PRETTY_FUNCTION__, ifp->name); | |
827 | continue; | |
828 | } | |
829 | ||
d8424057 DS |
830 | v4_addrs++; |
831 | ||
12e41d03 DL |
832 | if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY)) |
833 | continue; | |
834 | ||
835 | return p->u.prefix4; | |
836 | } | |
837 | ||
d8424057 DS |
838 | /* |
839 | * If we have no v4_addrs and v6 is configured | |
840 | * We probably are using unnumbered | |
841 | * So let's grab the loopbacks v4 address | |
842 | * and use that as the primary address | |
843 | */ | |
844 | if (!v4_addrs && v6_addrs && !if_is_loopback (ifp)) | |
845 | { | |
846 | struct interface *lo_ifp; | |
847 | lo_ifp = if_lookup_by_name_vrf ("lo", VRF_DEFAULT); | |
848 | if (lo_ifp) | |
849 | return pim_find_primary_addr (lo_ifp); | |
850 | } | |
851 | ||
12e41d03 DL |
852 | addr.s_addr = PIM_NET_INADDR_ANY; |
853 | ||
854 | return addr; | |
855 | } | |
856 | ||
9df99407 | 857 | static int |
744d91b3 DS |
858 | pim_iface_next_vif_index (struct interface *ifp) |
859 | { | |
dc0665f1 | 860 | int i; |
744d91b3 DS |
861 | /* |
862 | * The pimreg vif is always going to be in index 0 | |
863 | * of the table. | |
864 | */ | |
865 | if (ifp->ifindex == PIM_OIF_PIM_REGISTER_VIF) | |
866 | return 0; | |
867 | ||
dc0665f1 DS |
868 | for (i = 1 ; i < MAXVIFS; i++) |
869 | { | |
870 | if (pim_iface_vif_index[i] == 0) | |
871 | return i; | |
872 | } | |
873 | return MAXVIFS; | |
744d91b3 DS |
874 | } |
875 | ||
12e41d03 DL |
876 | /* |
877 | pim_if_add_vif() uses ifindex as vif_index | |
878 | ||
879 | see also pim_if_find_vifindex_by_ifindex() | |
880 | */ | |
881 | int pim_if_add_vif(struct interface *ifp) | |
882 | { | |
883 | struct pim_interface *pim_ifp = ifp->info; | |
884 | struct in_addr ifaddr; | |
b3f2bf7c | 885 | unsigned char flags = 0; |
12e41d03 DL |
886 | |
887 | zassert(pim_ifp); | |
888 | ||
889 | if (pim_ifp->mroute_vif_index > 0) { | |
890 | zlog_warn("%s: vif_index=%d > 0 on interface %s ifindex=%d", | |
891 | __PRETTY_FUNCTION__, | |
892 | pim_ifp->mroute_vif_index, ifp->name, ifp->ifindex); | |
893 | return -1; | |
894 | } | |
895 | ||
e34a317a | 896 | if (ifp->ifindex < 0) { |
12e41d03 DL |
897 | zlog_warn("%s: ifindex=%d < 1 on interface %s", |
898 | __PRETTY_FUNCTION__, | |
899 | ifp->ifindex, ifp->name); | |
900 | return -2; | |
901 | } | |
902 | ||
12e41d03 | 903 | ifaddr = pim_ifp->primary_address; |
c992c9a0 | 904 | if (ifp->ifindex != PIM_OIF_PIM_REGISTER_VIF && PIM_INADDR_IS_ANY(ifaddr)) { |
12e41d03 DL |
905 | zlog_warn("%s: could not get address for interface %s ifindex=%d", |
906 | __PRETTY_FUNCTION__, | |
907 | ifp->name, ifp->ifindex); | |
908 | return -4; | |
909 | } | |
910 | ||
744d91b3 DS |
911 | pim_ifp->mroute_vif_index = pim_iface_next_vif_index (ifp); |
912 | ||
913 | if (pim_ifp->mroute_vif_index >= MAXVIFS) | |
914 | { | |
915 | zlog_warn("%s: Attempting to configure more than MAXVIFS=%d on pim enabled interface %s", | |
916 | __PRETTY_FUNCTION__, | |
917 | MAXVIFS, ifp->name); | |
918 | return -3; | |
919 | } | |
920 | ||
b3f2bf7c RW |
921 | if (ifp->ifindex == PIM_OIF_PIM_REGISTER_VIF) |
922 | flags = VIFF_REGISTER; | |
923 | #ifdef VIFF_USE_IFINDEX | |
924 | else | |
925 | flags = VIFF_USE_IFINDEX; | |
926 | #endif | |
927 | ||
744d91b3 | 928 | if (pim_mroute_add_vif(ifp, ifaddr, flags)) { |
12e41d03 DL |
929 | /* pim_mroute_add_vif reported error */ |
930 | return -5; | |
931 | } | |
932 | ||
dc0665f1 | 933 | pim_iface_vif_index[pim_ifp->mroute_vif_index] = 1; |
12e41d03 DL |
934 | return 0; |
935 | } | |
936 | ||
12e41d03 DL |
937 | int pim_if_del_vif(struct interface *ifp) |
938 | { | |
939 | struct pim_interface *pim_ifp = ifp->info; | |
12e41d03 DL |
940 | |
941 | if (pim_ifp->mroute_vif_index < 1) { | |
942 | zlog_warn("%s: vif_index=%d < 1 on interface %s ifindex=%d", | |
943 | __PRETTY_FUNCTION__, | |
944 | pim_ifp->mroute_vif_index, ifp->name, ifp->ifindex); | |
945 | return -1; | |
946 | } | |
947 | ||
429a291b | 948 | pim_mroute_del_vif(pim_ifp->mroute_vif_index); |
12e41d03 DL |
949 | |
950 | /* | |
dc0665f1 | 951 | Update vif_index |
12e41d03 | 952 | */ |
dc0665f1 | 953 | pim_iface_vif_index[pim_ifp->mroute_vif_index] = 0; |
12e41d03 DL |
954 | |
955 | pim_ifp->mroute_vif_index = -1; | |
956 | ||
12e41d03 DL |
957 | return 0; |
958 | } | |
959 | ||
960 | void pim_if_add_vif_all() | |
961 | { | |
962 | struct listnode *ifnode; | |
963 | struct listnode *ifnextnode; | |
964 | struct interface *ifp; | |
965 | ||
469351b3 | 966 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
967 | if (!ifp->info) |
968 | continue; | |
969 | ||
970 | pim_if_add_vif(ifp); | |
971 | } | |
972 | } | |
973 | ||
974 | void pim_if_del_vif_all() | |
975 | { | |
976 | struct listnode *ifnode; | |
977 | struct listnode *ifnextnode; | |
978 | struct interface *ifp; | |
979 | ||
469351b3 | 980 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
981 | if (!ifp->info) |
982 | continue; | |
983 | ||
984 | pim_if_del_vif(ifp); | |
985 | } | |
986 | } | |
987 | ||
b892f1dd | 988 | struct interface *pim_if_find_by_vif_index(ifindex_t vif_index) |
12e41d03 DL |
989 | { |
990 | struct listnode *ifnode; | |
991 | struct interface *ifp; | |
992 | ||
ae90dfbb DS |
993 | if (vif_index == 0) |
994 | return if_lookup_by_name_vrf ("pimreg", VRF_DEFAULT); | |
995 | ||
469351b3 | 996 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), ifnode, ifp)) { |
12e41d03 DL |
997 | if (ifp->info) { |
998 | struct pim_interface *pim_ifp; | |
999 | pim_ifp = ifp->info; | |
b892f1dd | 1000 | |
12e41d03 DL |
1001 | if (vif_index == pim_ifp->mroute_vif_index) |
1002 | return ifp; | |
1003 | } | |
1004 | } | |
1005 | ||
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | /* | |
1010 | pim_if_add_vif() uses ifindex as vif_index | |
1011 | */ | |
b892f1dd | 1012 | int pim_if_find_vifindex_by_ifindex(ifindex_t ifindex) |
12e41d03 | 1013 | { |
ae90dfbb DS |
1014 | struct pim_interface *pim_ifp; |
1015 | struct interface *ifp; | |
1016 | ||
1017 | ifp = if_lookup_by_index_vrf (ifindex, VRF_DEFAULT); | |
28185336 | 1018 | if (!ifp || !ifp->info) |
ae90dfbb | 1019 | return -1; |
28185336 | 1020 | pim_ifp = ifp->info; |
ae90dfbb DS |
1021 | |
1022 | return pim_ifp->mroute_vif_index; | |
12e41d03 DL |
1023 | } |
1024 | ||
1025 | int pim_if_lan_delay_enabled(struct interface *ifp) | |
1026 | { | |
1027 | struct pim_interface *pim_ifp; | |
1028 | ||
1029 | pim_ifp = ifp->info; | |
1030 | zassert(pim_ifp); | |
1031 | zassert(pim_ifp->pim_number_of_nonlandelay_neighbors >= 0); | |
1032 | ||
1033 | return pim_ifp->pim_number_of_nonlandelay_neighbors == 0; | |
1034 | } | |
1035 | ||
1036 | uint16_t pim_if_effective_propagation_delay_msec(struct interface *ifp) | |
1037 | { | |
1038 | if (pim_if_lan_delay_enabled(ifp)) { | |
1039 | struct pim_interface *pim_ifp; | |
1040 | pim_ifp = ifp->info; | |
1041 | return pim_ifp->pim_neighbors_highest_propagation_delay_msec; | |
1042 | } | |
1043 | else { | |
1044 | return PIM_DEFAULT_PROPAGATION_DELAY_MSEC; | |
1045 | } | |
1046 | } | |
1047 | ||
1048 | uint16_t pim_if_effective_override_interval_msec(struct interface *ifp) | |
1049 | { | |
1050 | if (pim_if_lan_delay_enabled(ifp)) { | |
1051 | struct pim_interface *pim_ifp; | |
1052 | pim_ifp = ifp->info; | |
1053 | return pim_ifp->pim_neighbors_highest_override_interval_msec; | |
1054 | } | |
1055 | else { | |
1056 | return PIM_DEFAULT_OVERRIDE_INTERVAL_MSEC; | |
1057 | } | |
1058 | } | |
1059 | ||
1060 | int pim_if_t_override_msec(struct interface *ifp) | |
1061 | { | |
1062 | int effective_override_interval_msec; | |
1063 | int t_override_msec; | |
1064 | ||
1065 | effective_override_interval_msec = | |
1066 | pim_if_effective_override_interval_msec(ifp); | |
1067 | ||
60b40924 | 1068 | t_override_msec = random() % (effective_override_interval_msec + 1); |
12e41d03 DL |
1069 | |
1070 | return t_override_msec; | |
1071 | } | |
1072 | ||
1073 | uint16_t pim_if_jp_override_interval_msec(struct interface *ifp) | |
1074 | { | |
1075 | return pim_if_effective_propagation_delay_msec(ifp) + | |
1076 | pim_if_effective_override_interval_msec(ifp); | |
1077 | } | |
1078 | ||
1079 | /* | |
1080 | RFC 4601: 4.1.6. State Summarization Macros | |
1081 | ||
1082 | The function NBR( I, A ) uses information gathered through PIM Hello | |
1083 | messages to map the IP address A of a directly connected PIM | |
1084 | neighbor router on interface I to the primary IP address of the same | |
1085 | router (Section 4.3.4). The primary IP address of a neighbor is the | |
1086 | address that it uses as the source of its PIM Hello messages. | |
1087 | */ | |
1088 | struct pim_neighbor *pim_if_find_neighbor(struct interface *ifp, | |
1089 | struct in_addr addr) | |
1090 | { | |
1091 | struct listnode *neighnode; | |
1092 | struct pim_neighbor *neigh; | |
1093 | struct pim_interface *pim_ifp; | |
1094 | ||
1095 | zassert(ifp); | |
1096 | ||
1097 | pim_ifp = ifp->info; | |
1098 | if (!pim_ifp) { | |
1099 | zlog_warn("%s: multicast not enabled on interface %s", | |
1100 | __PRETTY_FUNCTION__, | |
1101 | ifp->name); | |
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->pim_neighbor_list, neighnode, neigh)) { | |
1106 | ||
1107 | /* primary address ? */ | |
1108 | if (neigh->source_addr.s_addr == addr.s_addr) | |
1109 | return neigh; | |
1110 | ||
1111 | /* secondary address ? */ | |
1112 | if (pim_neighbor_find_secondary(neigh, addr)) | |
1113 | return neigh; | |
1114 | } | |
1115 | ||
1116 | if (PIM_DEBUG_PIM_TRACE) { | |
eaa54bdb | 1117 | char addr_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
1118 | pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str)); |
1119 | zlog_debug("%s: neighbor not found for address %s on interface %s", | |
1120 | __PRETTY_FUNCTION__, | |
1121 | addr_str, ifp->name); | |
1122 | } | |
1123 | ||
ff67a923 | 1124 | return NULL; |
12e41d03 DL |
1125 | } |
1126 | ||
1127 | long pim_if_t_suppressed_msec(struct interface *ifp) | |
1128 | { | |
1129 | struct pim_interface *pim_ifp; | |
1130 | long t_suppressed_msec; | |
60b40924 | 1131 | uint32_t ramount = 0; |
12e41d03 DL |
1132 | |
1133 | pim_ifp = ifp->info; | |
1134 | zassert(pim_ifp); | |
1135 | ||
1136 | /* join suppression disabled ? */ | |
1137 | if (PIM_IF_TEST_PIM_CAN_DISABLE_JOIN_SUPRESSION(pim_ifp->options)) | |
1138 | return 0; | |
1139 | ||
1140 | /* t_suppressed = t_periodic * rand(1.1, 1.4) */ | |
60b40924 DS |
1141 | ramount = 1100 + (random() % (1400 - 1100 + 1)); |
1142 | t_suppressed_msec = qpim_t_periodic * ramount; | |
12e41d03 DL |
1143 | |
1144 | return t_suppressed_msec; | |
1145 | } | |
1146 | ||
1147 | static void igmp_join_free(struct igmp_join *ij) | |
1148 | { | |
1149 | XFREE(MTYPE_PIM_IGMP_JOIN, ij); | |
1150 | } | |
1151 | ||
1152 | static struct igmp_join *igmp_join_find(struct list *join_list, | |
1153 | struct in_addr group_addr, | |
1154 | struct in_addr source_addr) | |
1155 | { | |
1156 | struct listnode *node; | |
1157 | struct igmp_join *ij; | |
1158 | ||
1159 | zassert(join_list); | |
1160 | ||
1161 | for (ALL_LIST_ELEMENTS_RO(join_list, node, ij)) { | |
1162 | if ((group_addr.s_addr == ij->group_addr.s_addr) && | |
1163 | (source_addr.s_addr == ij->source_addr.s_addr)) | |
1164 | return ij; | |
1165 | } | |
1166 | ||
1167 | return 0; | |
1168 | } | |
1169 | ||
1170 | static int igmp_join_sock(const char *ifname, | |
b892f1dd | 1171 | ifindex_t ifindex, |
12e41d03 DL |
1172 | struct in_addr group_addr, |
1173 | struct in_addr source_addr) | |
1174 | { | |
1175 | int join_fd; | |
1176 | ||
1177 | join_fd = pim_socket_raw(IPPROTO_IGMP); | |
1178 | if (join_fd < 0) { | |
1179 | return -1; | |
1180 | } | |
1181 | ||
1182 | if (pim_socket_join_source(join_fd, ifindex, group_addr, source_addr, ifname)) { | |
1183 | close(join_fd); | |
1184 | return -2; | |
1185 | } | |
1186 | ||
1187 | return join_fd; | |
1188 | } | |
1189 | ||
1190 | static struct igmp_join *igmp_join_new(struct interface *ifp, | |
1191 | struct in_addr group_addr, | |
1192 | struct in_addr source_addr) | |
1193 | { | |
1194 | struct pim_interface *pim_ifp; | |
1195 | struct igmp_join *ij; | |
1196 | int join_fd; | |
1197 | ||
1198 | pim_ifp = ifp->info; | |
1199 | zassert(pim_ifp); | |
1200 | ||
1201 | join_fd = igmp_join_sock(ifp->name, ifp->ifindex, group_addr, source_addr); | |
1202 | if (join_fd < 0) { | |
eaa54bdb DW |
1203 | char group_str[INET_ADDRSTRLEN]; |
1204 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1205 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1206 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1207 | zlog_warn("%s: igmp_join_sock() failure for IGMP group %s source %s on interface %s", | |
1208 | __PRETTY_FUNCTION__, | |
1209 | group_str, source_str, ifp->name); | |
1210 | return 0; | |
1211 | } | |
1212 | ||
36d9e7dc | 1213 | ij = XCALLOC(MTYPE_PIM_IGMP_JOIN, sizeof(*ij)); |
12e41d03 | 1214 | if (!ij) { |
eaa54bdb DW |
1215 | char group_str[INET_ADDRSTRLEN]; |
1216 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1217 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1218 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
36d9e7dc | 1219 | zlog_err("%s: XCALLOC(%zu) failure for IGMP group %s source %s on interface %s", |
12e41d03 DL |
1220 | __PRETTY_FUNCTION__, |
1221 | sizeof(*ij), group_str, source_str, ifp->name); | |
1222 | close(join_fd); | |
1223 | return 0; | |
1224 | } | |
1225 | ||
1226 | ij->sock_fd = join_fd; | |
1227 | ij->group_addr = group_addr; | |
1228 | ij->source_addr = source_addr; | |
1229 | ij->sock_creation = pim_time_monotonic_sec(); | |
1230 | ||
1231 | listnode_add(pim_ifp->igmp_join_list, ij); | |
1232 | ||
1233 | return ij; | |
1234 | } | |
1235 | ||
1236 | int pim_if_igmp_join_add(struct interface *ifp, | |
1237 | struct in_addr group_addr, | |
1238 | struct in_addr source_addr) | |
1239 | { | |
1240 | struct pim_interface *pim_ifp; | |
1241 | struct igmp_join *ij; | |
1242 | ||
1243 | pim_ifp = ifp->info; | |
1244 | if (!pim_ifp) { | |
1245 | zlog_warn("%s: multicast not enabled on interface %s", | |
1246 | __PRETTY_FUNCTION__, | |
1247 | ifp->name); | |
1248 | return -1; | |
1249 | } | |
1250 | ||
1251 | if (!pim_ifp->igmp_join_list) { | |
1252 | pim_ifp->igmp_join_list = list_new(); | |
1253 | if (!pim_ifp->igmp_join_list) { | |
1254 | zlog_err("%s %s: failure: igmp_join_list=list_new()", | |
1255 | __FILE__, __PRETTY_FUNCTION__); | |
1256 | return -2; | |
1257 | } | |
1258 | pim_ifp->igmp_join_list->del = (void (*)(void *)) igmp_join_free; | |
1259 | } | |
1260 | ||
1261 | ij = igmp_join_find(pim_ifp->igmp_join_list, group_addr, source_addr); | |
1262 | if (ij) { | |
eaa54bdb DW |
1263 | char group_str[INET_ADDRSTRLEN]; |
1264 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1265 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1266 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1267 | zlog_warn("%s: can't re-join existing IGMP group %s source %s on interface %s", | |
1268 | __PRETTY_FUNCTION__, | |
1269 | group_str, source_str, ifp->name); | |
1270 | return -3; | |
1271 | } | |
1272 | ||
1273 | ij = igmp_join_new(ifp, group_addr, source_addr); | |
1274 | if (!ij) { | |
eaa54bdb DW |
1275 | char group_str[INET_ADDRSTRLEN]; |
1276 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1277 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1278 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1279 | zlog_warn("%s: igmp_join_new() failure for IGMP group %s source %s on interface %s", | |
1280 | __PRETTY_FUNCTION__, | |
1281 | group_str, source_str, ifp->name); | |
1282 | return -4; | |
1283 | } | |
1284 | ||
7adf0260 | 1285 | if (PIM_DEBUG_IGMP_EVENTS) { |
eaa54bdb DW |
1286 | char group_str[INET_ADDRSTRLEN]; |
1287 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1288 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1289 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1290 | zlog_debug("%s: issued static igmp join for channel (S,G)=(%s,%s) on interface %s", | |
7adf0260 DS |
1291 | __PRETTY_FUNCTION__, |
1292 | source_str, group_str, ifp->name); | |
12e41d03 DL |
1293 | } |
1294 | ||
1295 | return 0; | |
1296 | } | |
1297 | ||
1298 | ||
1299 | ||
1300 | int pim_if_igmp_join_del(struct interface *ifp, | |
1301 | struct in_addr group_addr, | |
1302 | struct in_addr source_addr) | |
1303 | { | |
1304 | struct pim_interface *pim_ifp; | |
1305 | struct igmp_join *ij; | |
1306 | ||
1307 | pim_ifp = ifp->info; | |
1308 | if (!pim_ifp) { | |
1309 | zlog_warn("%s: multicast not enabled on interface %s", | |
1310 | __PRETTY_FUNCTION__, | |
1311 | ifp->name); | |
1312 | return -1; | |
1313 | } | |
1314 | ||
1315 | if (!pim_ifp->igmp_join_list) { | |
1316 | zlog_warn("%s: no IGMP join on interface %s", | |
1317 | __PRETTY_FUNCTION__, | |
1318 | ifp->name); | |
1319 | return -2; | |
1320 | } | |
1321 | ||
1322 | ij = igmp_join_find(pim_ifp->igmp_join_list, group_addr, source_addr); | |
1323 | if (!ij) { | |
eaa54bdb DW |
1324 | char group_str[INET_ADDRSTRLEN]; |
1325 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1326 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1327 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1328 | zlog_warn("%s: could not find IGMP group %s source %s on interface %s", | |
1329 | __PRETTY_FUNCTION__, | |
1330 | group_str, source_str, ifp->name); | |
1331 | return -3; | |
1332 | } | |
1333 | ||
1334 | if (close(ij->sock_fd)) { | |
eaa54bdb DW |
1335 | char group_str[INET_ADDRSTRLEN]; |
1336 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1337 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1338 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1339 | zlog_warn("%s: failure closing sock_fd=%d for IGMP group %s source %s on interface %s: errno=%d: %s", | |
1340 | __PRETTY_FUNCTION__, | |
3d7765d7 | 1341 | ij->sock_fd, group_str, source_str, ifp->name, errno, safe_strerror(errno)); |
12e41d03 DL |
1342 | /* warning only */ |
1343 | } | |
1344 | listnode_delete(pim_ifp->igmp_join_list, ij); | |
1345 | igmp_join_free(ij); | |
1346 | if (listcount(pim_ifp->igmp_join_list) < 1) { | |
1347 | list_delete(pim_ifp->igmp_join_list); | |
1348 | pim_ifp->igmp_join_list = 0; | |
1349 | } | |
1350 | ||
1351 | return 0; | |
1352 | } | |
1353 | ||
1354 | static void pim_if_igmp_join_del_all(struct interface *ifp) | |
1355 | { | |
1356 | struct pim_interface *pim_ifp; | |
1357 | struct listnode *node; | |
1358 | struct listnode *nextnode; | |
1359 | struct igmp_join *ij; | |
1360 | ||
1361 | pim_ifp = ifp->info; | |
1362 | if (!pim_ifp) { | |
1363 | zlog_warn("%s: multicast not enabled on interface %s", | |
1364 | __PRETTY_FUNCTION__, | |
1365 | ifp->name); | |
1366 | return; | |
1367 | } | |
1368 | ||
1369 | if (!pim_ifp->igmp_join_list) | |
1370 | return; | |
1371 | ||
1372 | for (ALL_LIST_ELEMENTS(pim_ifp->igmp_join_list, node, nextnode, ij)) | |
1373 | pim_if_igmp_join_del(ifp, ij->group_addr, ij->source_addr); | |
1374 | } | |
1375 | ||
1376 | /* | |
1377 | RFC 4601 | |
1378 | ||
1379 | Transitions from "I am Assert Loser" State | |
1380 | ||
1381 | Current Winner's GenID Changes or NLT Expires | |
1382 | ||
1383 | The Neighbor Liveness Timer associated with the current winner | |
1384 | expires or we receive a Hello message from the current winner | |
1385 | reporting a different GenID from the one it previously reported. | |
1386 | This indicates that the current winner's interface or router has | |
1387 | gone down (and may have come back up), and so we must assume it no | |
1388 | longer knows it was the winner. | |
1389 | */ | |
1390 | void pim_if_assert_on_neighbor_down(struct interface *ifp, | |
1391 | struct in_addr neigh_addr) | |
1392 | { | |
1393 | struct pim_interface *pim_ifp; | |
1394 | struct listnode *node; | |
1395 | struct listnode *next_node; | |
1396 | struct pim_ifchannel *ch; | |
1397 | ||
1398 | pim_ifp = ifp->info; | |
1399 | zassert(pim_ifp); | |
1400 | ||
1401 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, node, next_node, ch)) { | |
1402 | /* Is (S,G,I) assert loser ? */ | |
1403 | if (ch->ifassert_state != PIM_IFASSERT_I_AM_LOSER) | |
1404 | continue; | |
1405 | /* Dead neighbor was winner ? */ | |
1406 | if (ch->ifassert_winner.s_addr != neigh_addr.s_addr) | |
1407 | continue; | |
1408 | ||
1409 | assert_action_a5(ch); | |
1410 | } | |
1411 | } | |
1412 | ||
1413 | void pim_if_update_join_desired(struct pim_interface *pim_ifp) | |
1414 | { | |
1415 | struct listnode *ch_node; | |
1416 | struct pim_ifchannel *ch; | |
1417 | ||
1418 | /* clear off flag from interface's upstreams */ | |
1419 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->pim_ifchannel_list, ch_node, ch)) { | |
1420 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED_UPDATED(ch->upstream->flags); | |
1421 | } | |
1422 | ||
1423 | /* scan per-interface (S,G,I) state on this I interface */ | |
1424 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->pim_ifchannel_list, ch_node, ch)) { | |
1425 | struct pim_upstream *up = ch->upstream; | |
1426 | ||
1427 | if (PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED_UPDATED(up->flags)) | |
1428 | continue; | |
1429 | ||
1430 | /* update join_desired for the global (S,G) state */ | |
1431 | pim_upstream_update_join_desired(up); | |
1432 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED_UPDATED(up->flags); | |
1433 | } | |
1434 | } | |
1435 | ||
1436 | void pim_if_update_assert_tracking_desired(struct interface *ifp) | |
1437 | { | |
1438 | struct pim_interface *pim_ifp; | |
1439 | struct listnode *node; | |
1440 | struct listnode *next_node; | |
1441 | struct pim_ifchannel *ch; | |
1442 | ||
1443 | pim_ifp = ifp->info; | |
1444 | if (!pim_ifp) | |
1445 | return; | |
1446 | ||
1447 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, node, next_node, ch)) { | |
1448 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1449 | } | |
1450 | } | |
c992c9a0 DS |
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 (void) | |
1458 | { | |
1459 | if (!pim_regiface) { | |
1460 | pim_regiface = if_create("pimreg", strlen("pimreg")); | |
1461 | pim_regiface->ifindex = PIM_OIF_PIM_REGISTER_VIF; | |
1462 | ||
1463 | pim_if_new(pim_regiface, 0, 0); | |
1464 | } | |
1465 | } | |
3565202d DS |
1466 | |
1467 | int | |
1468 | pim_if_connected_to_source (struct interface *ifp, struct in_addr src) | |
1469 | { | |
1470 | struct listnode *cnode; | |
1471 | struct connected *c; | |
1472 | struct prefix p; | |
1473 | ||
1474 | p.family = AF_INET; | |
1475 | p.u.prefix4 = src; | |
1476 | p.prefixlen = IPV4_MAX_BITLEN; | |
1477 | ||
1478 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, c)) | |
1479 | { | |
1480 | if ((c->address->family == AF_INET) && | |
1481 | prefix_match (CONNECTED_PREFIX (c), &p)) | |
1482 | { | |
1483 | return 1; | |
1484 | } | |
1485 | } | |
1486 | ||
1487 | return 0; | |
1488 | } | |
9f0edbc9 DS |
1489 | |
1490 | struct interface * | |
1491 | pim_if_lookup_address_vrf (struct in_addr src, vrf_id_t vrf_id) | |
1492 | { | |
1493 | struct listnode *ifnode; | |
1494 | struct interface *ifp; | |
1495 | ||
1496 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist(vrf_id), ifnode, ifp)) | |
1497 | { | |
1498 | if (pim_if_connected_to_source (ifp, src) && ifp->info) | |
1499 | return ifp; | |
1500 | } | |
1501 | return NULL; | |
1502 | } |