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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" |
a625e937 | 30 | #include "hash.h" |
12e41d03 DL |
31 | |
32 | #include "pimd.h" | |
33 | #include "pim_iface.h" | |
34 | #include "pim_igmp.h" | |
35 | #include "pim_mroute.h" | |
36 | #include "pim_oil.h" | |
37 | #include "pim_str.h" | |
38 | #include "pim_pim.h" | |
39 | #include "pim_neighbor.h" | |
40 | #include "pim_ifchannel.h" | |
12e41d03 DL |
41 | #include "pim_sock.h" |
42 | #include "pim_time.h" | |
43 | #include "pim_ssmpingd.h" | |
7176984f | 44 | #include "pim_rp.h" |
12e41d03 | 45 | |
c992c9a0 | 46 | struct interface *pim_regiface = NULL; |
ea4a71fc | 47 | struct list *pim_ifchannel_list = NULL; |
dc0665f1 | 48 | static int pim_iface_vif_index[MAXVIFS]; |
c992c9a0 | 49 | |
12e41d03 DL |
50 | static void pim_if_igmp_join_del_all(struct interface *ifp); |
51 | ||
ea4a71fc DS |
52 | void |
53 | pim_if_init (void) | |
54 | { | |
dc0665f1 DS |
55 | int i; |
56 | ||
57 | for (i = 0; i < MAXVIFS; i++) | |
58 | pim_iface_vif_index[i] = 0; | |
59 | ||
ea4a71fc DS |
60 | vrf_iflist_create(VRF_DEFAULT); |
61 | pim_ifchannel_list = list_new(); | |
62 | pim_ifchannel_list->cmp = (int (*)(void *, void *))pim_ifchannel_compare; | |
63 | } | |
64 | ||
65 | void | |
66 | pim_if_terminate (void) | |
67 | { | |
68 | if (pim_ifchannel_list) | |
69 | list_free (pim_ifchannel_list); | |
70 | } | |
71 | ||
72 | static void *if_list_clean(struct pim_interface *pim_ifp) | |
73 | { | |
74 | if (pim_ifp->igmp_join_list) { | |
75 | list_delete(pim_ifp->igmp_join_list); | |
76 | } | |
77 | ||
78 | if (pim_ifp->igmp_socket_list) { | |
79 | list_delete(pim_ifp->igmp_socket_list); | |
80 | } | |
81 | ||
82 | if (pim_ifp->pim_neighbor_list) { | |
83 | list_delete(pim_ifp->pim_neighbor_list); | |
84 | } | |
85 | ||
982bff89 DS |
86 | if (pim_ifp->upstream_switch_list) |
87 | list_delete(pim_ifp->upstream_switch_list); | |
88 | ||
ea4a71fc DS |
89 | if (pim_ifp->pim_ifchannel_list) { |
90 | list_delete(pim_ifp->pim_ifchannel_list); | |
91 | } | |
92 | ||
a625e937 | 93 | if (pim_ifp->pim_ifchannel_hash) |
982bff89 | 94 | hash_free(pim_ifp->pim_ifchannel_hash); |
a625e937 | 95 | |
ea4a71fc DS |
96 | XFREE(MTYPE_PIM_INTERFACE, pim_ifp); |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
12e41d03 DL |
101 | struct pim_interface *pim_if_new(struct interface *ifp, int igmp, int pim) |
102 | { | |
103 | struct pim_interface *pim_ifp; | |
104 | ||
105 | zassert(ifp); | |
106 | zassert(!ifp->info); | |
107 | ||
36d9e7dc | 108 | pim_ifp = XCALLOC(MTYPE_PIM_INTERFACE, sizeof(*pim_ifp)); |
12e41d03 | 109 | if (!pim_ifp) { |
36d9e7dc | 110 | zlog_err("PIM XCALLOC(%zu) failure", sizeof(*pim_ifp)); |
12e41d03 DL |
111 | return 0; |
112 | } | |
113 | ||
114 | pim_ifp->options = 0; | |
115 | pim_ifp->mroute_vif_index = -1; | |
116 | ||
b05b72e8 | 117 | pim_ifp->igmp_version = IGMP_DEFAULT_VERSION; |
12e41d03 DL |
118 | pim_ifp->igmp_default_robustness_variable = IGMP_DEFAULT_ROBUSTNESS_VARIABLE; |
119 | pim_ifp->igmp_default_query_interval = IGMP_GENERAL_QUERY_INTERVAL; | |
120 | pim_ifp->igmp_query_max_response_time_dsec = IGMP_QUERY_MAX_RESPONSE_TIME_DSEC; | |
121 | pim_ifp->igmp_specific_query_max_response_time_dsec = IGMP_SPECIFIC_QUERY_MAX_RESPONSE_TIME_DSEC; | |
122 | ||
123 | /* | |
124 | RFC 3376: 8.3. Query Response Interval | |
125 | The number of seconds represented by the [Query Response Interval] | |
126 | must be less than the [Query Interval]. | |
127 | */ | |
128 | zassert(pim_ifp->igmp_query_max_response_time_dsec < pim_ifp->igmp_default_query_interval); | |
129 | ||
130 | if (pim) | |
131 | PIM_IF_DO_PIM(pim_ifp->options); | |
132 | if (igmp) | |
133 | PIM_IF_DO_IGMP(pim_ifp->options); | |
134 | ||
12e41d03 | 135 | PIM_IF_DO_IGMP_LISTEN_ALLROUTERS(pim_ifp->options); |
12e41d03 | 136 | |
59ba0ac3 DS |
137 | pim_ifp->igmp_join_list = NULL; |
138 | pim_ifp->igmp_socket_list = NULL; | |
139 | pim_ifp->pim_neighbor_list = NULL; | |
982bff89 | 140 | pim_ifp->upstream_switch_list = NULL; |
59ba0ac3 | 141 | pim_ifp->pim_ifchannel_list = NULL; |
a625e937 | 142 | pim_ifp->pim_ifchannel_hash = NULL; |
e4cc0185 | 143 | pim_ifp->pim_generation_id = 0; |
12e41d03 DL |
144 | |
145 | /* list of struct igmp_sock */ | |
146 | pim_ifp->igmp_socket_list = list_new(); | |
147 | if (!pim_ifp->igmp_socket_list) { | |
148 | zlog_err("%s %s: failure: igmp_socket_list=list_new()", | |
149 | __FILE__, __PRETTY_FUNCTION__); | |
150 | return if_list_clean(pim_ifp); | |
151 | } | |
152 | pim_ifp->igmp_socket_list->del = (void (*)(void *)) igmp_sock_free; | |
153 | ||
154 | /* list of struct pim_neighbor */ | |
155 | pim_ifp->pim_neighbor_list = list_new(); | |
156 | if (!pim_ifp->pim_neighbor_list) { | |
157 | zlog_err("%s %s: failure: pim_neighbor_list=list_new()", | |
158 | __FILE__, __PRETTY_FUNCTION__); | |
159 | return if_list_clean(pim_ifp); | |
160 | } | |
161 | pim_ifp->pim_neighbor_list->del = (void (*)(void *)) pim_neighbor_free; | |
162 | ||
982bff89 DS |
163 | pim_ifp->upstream_switch_list = list_new(); |
164 | if (!pim_ifp->upstream_switch_list) { | |
165 | zlog_err("%s %s: failure: upstream_switch_list=list_new()", | |
166 | __FILE__, __PRETTY_FUNCTION__); | |
167 | return if_list_clean(pim_ifp); | |
168 | } | |
169 | ||
12e41d03 DL |
170 | /* list of struct pim_ifchannel */ |
171 | pim_ifp->pim_ifchannel_list = list_new(); | |
172 | if (!pim_ifp->pim_ifchannel_list) { | |
173 | zlog_err("%s %s: failure: pim_ifchannel_list=list_new()", | |
174 | __FILE__, __PRETTY_FUNCTION__); | |
175 | return if_list_clean(pim_ifp); | |
176 | } | |
177 | pim_ifp->pim_ifchannel_list->del = (void (*)(void *)) pim_ifchannel_free; | |
bbd64ce1 | 178 | pim_ifp->pim_ifchannel_list->cmp = (int (*)(void *, void *)) pim_ifchannel_compare; |
12e41d03 | 179 | |
a625e937 DS |
180 | pim_ifp->pim_ifchannel_hash = hash_create (pim_ifchannel_hash_key, |
181 | pim_ifchannel_equal); | |
182 | ||
12e41d03 DL |
183 | ifp->info = pim_ifp; |
184 | ||
185 | pim_sock_reset(ifp); | |
186 | ||
b8d16be2 | 187 | pim_if_add_vif(ifp); |
12e41d03 DL |
188 | |
189 | return pim_ifp; | |
190 | } | |
191 | ||
192 | void pim_if_delete(struct interface *ifp) | |
193 | { | |
194 | struct pim_interface *pim_ifp; | |
195 | ||
196 | zassert(ifp); | |
197 | pim_ifp = ifp->info; | |
198 | zassert(pim_ifp); | |
199 | ||
200 | if (pim_ifp->igmp_join_list) { | |
201 | pim_if_igmp_join_del_all(ifp); | |
202 | } | |
12e41d03 | 203 | |
cb24fec4 DS |
204 | pim_ifchannel_delete_all (ifp); |
205 | igmp_sock_delete_all (ifp); | |
12e41d03 | 206 | |
cb24fec4 | 207 | pim_neighbor_delete_all (ifp, "Interface removed from configuration"); |
12e41d03 | 208 | |
b8d16be2 | 209 | pim_if_del_vif(ifp); |
12e41d03 DL |
210 | |
211 | list_delete(pim_ifp->igmp_socket_list); | |
212 | list_delete(pim_ifp->pim_neighbor_list); | |
982bff89 | 213 | list_delete(pim_ifp->upstream_switch_list); |
12e41d03 DL |
214 | list_delete(pim_ifp->pim_ifchannel_list); |
215 | ||
a625e937 DS |
216 | hash_free (pim_ifp->pim_ifchannel_hash); |
217 | ||
12e41d03 DL |
218 | XFREE(MTYPE_PIM_INTERFACE, pim_ifp); |
219 | ||
59ba0ac3 | 220 | ifp->info = NULL; |
12e41d03 DL |
221 | } |
222 | ||
223 | void pim_if_update_could_assert(struct interface *ifp) | |
224 | { | |
225 | struct pim_interface *pim_ifp; | |
226 | struct listnode *node; | |
227 | struct listnode *next_node; | |
228 | struct pim_ifchannel *ch; | |
229 | ||
230 | pim_ifp = ifp->info; | |
231 | zassert(pim_ifp); | |
232 | ||
233 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, node, next_node, ch)) { | |
234 | pim_ifchannel_update_could_assert(ch); | |
235 | } | |
236 | } | |
237 | ||
238 | static void pim_if_update_my_assert_metric(struct interface *ifp) | |
239 | { | |
240 | struct pim_interface *pim_ifp; | |
241 | struct listnode *node; | |
242 | struct listnode *next_node; | |
243 | struct pim_ifchannel *ch; | |
244 | ||
245 | pim_ifp = ifp->info; | |
246 | zassert(pim_ifp); | |
247 | ||
248 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, node, next_node, ch)) { | |
249 | pim_ifchannel_update_my_assert_metric(ch); | |
250 | } | |
251 | } | |
252 | ||
253 | static void pim_addr_change(struct interface *ifp) | |
254 | { | |
255 | struct pim_interface *pim_ifp; | |
256 | ||
257 | pim_ifp = ifp->info; | |
258 | zassert(pim_ifp); | |
259 | ||
260 | pim_if_dr_election(ifp); /* router's own DR Priority (addr) changes -- Done TODO T30 */ | |
261 | pim_if_update_join_desired(pim_ifp); /* depends on DR */ | |
262 | pim_if_update_could_assert(ifp); /* depends on DR */ | |
263 | pim_if_update_my_assert_metric(ifp); /* depends on could_assert */ | |
264 | pim_if_update_assert_tracking_desired(ifp); /* depends on DR, join_desired */ | |
265 | ||
266 | /* | |
267 | RFC 4601: 4.3.1. Sending Hello Messages | |
268 | ||
269 | 1) Before an interface goes down or changes primary IP address, a | |
270 | Hello message with a zero HoldTime should be sent immediately | |
271 | (with the old IP address if the IP address changed). | |
272 | -- FIXME See CAVEAT C13 | |
273 | ||
274 | 2) After an interface has changed its IP address, it MUST send a | |
275 | Hello message with its new IP address. | |
276 | -- DONE below | |
277 | ||
278 | 3) If an interface changes one of its secondary IP addresses, a | |
279 | Hello message with an updated Address_List option and a non-zero | |
280 | HoldTime should be sent immediately. | |
281 | -- FIXME See TODO T31 | |
282 | */ | |
283 | pim_ifp->pim_ifstat_hello_sent = 0; /* reset hello counter */ | |
284 | if (pim_ifp->pim_sock_fd < 0) | |
285 | return; | |
286 | pim_hello_restart_now(ifp); /* send hello and restart timer */ | |
287 | } | |
288 | ||
12e41d03 DL |
289 | static int detect_primary_address_change(struct interface *ifp, |
290 | int force_prim_as_any, | |
291 | const char *caller) | |
292 | { | |
4763cd0e | 293 | struct pim_interface *pim_ifp = ifp->info; |
12e41d03 DL |
294 | struct in_addr new_prim_addr; |
295 | int changed; | |
296 | ||
12e41d03 DL |
297 | if (force_prim_as_any) |
298 | new_prim_addr = qpim_inaddr_any; | |
299 | else | |
300 | new_prim_addr = pim_find_primary_addr(ifp); | |
301 | ||
302 | changed = new_prim_addr.s_addr != pim_ifp->primary_address.s_addr; | |
303 | ||
304 | if (PIM_DEBUG_ZEBRA) { | |
eaa54bdb DW |
305 | char new_prim_str[INET_ADDRSTRLEN]; |
306 | char old_prim_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
307 | pim_inet4_dump("<new?>", new_prim_addr, new_prim_str, sizeof(new_prim_str)); |
308 | pim_inet4_dump("<old?>", pim_ifp->primary_address, old_prim_str, sizeof(old_prim_str)); | |
309 | zlog_debug("%s: old=%s new=%s on interface %s: %s", | |
310 | __PRETTY_FUNCTION__, | |
311 | old_prim_str, new_prim_str, ifp->name, | |
312 | changed ? "changed" : "unchanged"); | |
313 | } | |
314 | ||
315 | if (changed) { | |
12e41d03 | 316 | pim_ifp->primary_address = new_prim_addr; |
12e41d03 DL |
317 | } |
318 | ||
319 | return changed; | |
320 | } | |
321 | ||
7176984f | 322 | static int pim_sec_addr_comp(const void *p1, const void *p2) |
323 | { | |
324 | const struct pim_secondary_addr *sec1 = p1; | |
325 | const struct pim_secondary_addr *sec2 = p2; | |
326 | ||
327 | if (ntohl(sec1->addr.s_addr) < ntohl(sec2->addr.s_addr)) | |
328 | return -1; | |
329 | ||
330 | if (ntohl(sec1->addr.s_addr) > ntohl(sec2->addr.s_addr)) | |
331 | return 1; | |
332 | ||
333 | return 0; | |
334 | } | |
335 | ||
336 | static void pim_sec_addr_free(struct pim_secondary_addr *sec_addr) | |
337 | { | |
338 | XFREE(MTYPE_PIM_SEC_ADDR, sec_addr); | |
339 | } | |
340 | ||
341 | static struct pim_secondary_addr * | |
342 | pim_sec_addr_find(struct pim_interface *pim_ifp, struct in_addr addr) | |
343 | { | |
344 | struct pim_secondary_addr *sec_addr; | |
345 | struct listnode *node; | |
346 | ||
347 | if (!pim_ifp->sec_addr_list) { | |
348 | return NULL; | |
349 | } | |
350 | ||
351 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->sec_addr_list, node, sec_addr)) { | |
352 | if (sec_addr->addr.s_addr == addr.s_addr) { | |
353 | return sec_addr; | |
354 | } | |
355 | } | |
356 | ||
357 | return NULL; | |
358 | } | |
359 | ||
360 | static void pim_sec_addr_del(struct pim_interface *pim_ifp, | |
361 | struct pim_secondary_addr *sec_addr) | |
362 | { | |
363 | listnode_delete(pim_ifp->sec_addr_list, sec_addr); | |
364 | pim_sec_addr_free(sec_addr); | |
365 | } | |
366 | ||
367 | static int pim_sec_addr_add(struct pim_interface *pim_ifp, struct in_addr addr) | |
368 | { | |
369 | int changed = 0; | |
370 | struct pim_secondary_addr *sec_addr; | |
371 | ||
372 | sec_addr = pim_sec_addr_find(pim_ifp, addr); | |
373 | if (sec_addr) { | |
374 | sec_addr->flags &= ~PIM_SEC_ADDRF_STALE; | |
375 | return changed; | |
376 | } | |
377 | ||
378 | if (!pim_ifp->sec_addr_list) { | |
379 | pim_ifp->sec_addr_list = list_new(); | |
380 | pim_ifp->sec_addr_list->del = (void (*)(void *))pim_sec_addr_free; | |
381 | pim_ifp->sec_addr_list->cmp = (int (*)(void *, void *))pim_sec_addr_comp; | |
382 | } | |
383 | ||
384 | sec_addr = XCALLOC(MTYPE_PIM_SEC_ADDR, sizeof(*sec_addr)); | |
385 | if (!sec_addr) { | |
386 | if (list_isempty(pim_ifp->sec_addr_list)) { | |
387 | list_free(pim_ifp->sec_addr_list); | |
388 | pim_ifp->sec_addr_list = NULL; | |
389 | } | |
390 | return changed; | |
391 | } | |
392 | ||
393 | changed = 1; | |
394 | sec_addr->addr = addr; | |
395 | listnode_add_sort(pim_ifp->sec_addr_list, sec_addr); | |
396 | ||
397 | return changed; | |
398 | } | |
399 | ||
400 | static int pim_sec_addr_del_all(struct pim_interface *pim_ifp) | |
401 | { | |
402 | int changed = 0; | |
403 | ||
404 | if (!pim_ifp->sec_addr_list) { | |
405 | return changed; | |
406 | } | |
407 | if (!list_isempty(pim_ifp->sec_addr_list)) { | |
408 | changed = 1; | |
409 | /* remove all nodes and free up the list itself */ | |
410 | list_delete_all_node(pim_ifp->sec_addr_list); | |
411 | list_free(pim_ifp->sec_addr_list); | |
412 | pim_ifp->sec_addr_list = NULL; | |
413 | } | |
414 | ||
415 | return changed; | |
416 | } | |
417 | ||
418 | static int pim_sec_addr_update(struct interface *ifp) | |
419 | { | |
420 | struct pim_interface *pim_ifp = ifp->info; | |
421 | struct connected *ifc; | |
422 | struct listnode *node; | |
423 | struct listnode *nextnode; | |
424 | struct pim_secondary_addr *sec_addr; | |
425 | int changed = 0; | |
426 | ||
427 | if (pim_ifp->sec_addr_list) { | |
428 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->sec_addr_list, node, sec_addr)) { | |
429 | sec_addr->flags |= PIM_SEC_ADDRF_STALE; | |
430 | } | |
431 | } | |
432 | ||
433 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) { | |
434 | struct prefix *p = ifc->address; | |
435 | ||
436 | if (p->family != AF_INET) { | |
437 | continue; | |
438 | } | |
439 | ||
440 | if (PIM_INADDR_IS_ANY(p->u.prefix4)) { | |
441 | continue; | |
442 | } | |
443 | ||
444 | if (pim_ifp->primary_address.s_addr == p->u.prefix4.s_addr) { | |
445 | /* don't add the primary address into the secondary address list */ | |
446 | continue; | |
447 | } | |
448 | ||
449 | if (pim_sec_addr_add(pim_ifp, p->u.prefix4)) { | |
450 | changed = 1; | |
451 | } | |
452 | } | |
453 | ||
454 | if (pim_ifp->sec_addr_list) { | |
455 | /* Drop stale entries */ | |
456 | for (ALL_LIST_ELEMENTS(pim_ifp->sec_addr_list, node, nextnode, sec_addr)) { | |
457 | if (sec_addr->flags & PIM_SEC_ADDRF_STALE) { | |
458 | pim_sec_addr_del(pim_ifp, sec_addr); | |
459 | changed = 1; | |
460 | } | |
461 | } | |
462 | ||
463 | /* If the list went empty free it up */ | |
464 | if (list_isempty(pim_ifp->sec_addr_list)) { | |
465 | list_free(pim_ifp->sec_addr_list); | |
466 | pim_ifp->sec_addr_list = NULL; | |
467 | } | |
468 | } | |
469 | ||
470 | return changed; | |
471 | } | |
472 | ||
4763cd0e | 473 | static int detect_secondary_address_change(struct interface *ifp, |
7176984f | 474 | int force_prim_as_any, |
12e41d03 DL |
475 | const char *caller) |
476 | { | |
4763cd0e | 477 | struct pim_interface *pim_ifp = ifp->info; |
7176984f | 478 | int changed = 0; |
12e41d03 | 479 | |
7176984f | 480 | if (force_prim_as_any) { |
481 | /* if primary address is being forced to zero just flush the | |
482 | * secondary address list */ | |
4763cd0e | 483 | changed = pim_sec_addr_del_all(pim_ifp); |
7176984f | 484 | } else { |
485 | /* re-evaluate the secondary address list */ | |
486 | changed = pim_sec_addr_update(ifp); | |
487 | } | |
488 | ||
4763cd0e | 489 | return changed; |
490 | } | |
491 | ||
492 | static void detect_address_change(struct interface *ifp, | |
493 | int force_prim_as_any, | |
494 | const char *caller) | |
495 | { | |
496 | int changed = 0; | |
497 | struct pim_interface *pim_ifp; | |
12e41d03 | 498 | |
4763cd0e | 499 | pim_ifp = ifp->info; |
500 | if (!pim_ifp) | |
12e41d03 | 501 | return; |
4763cd0e | 502 | |
503 | if (detect_primary_address_change(ifp, force_prim_as_any, caller)) { | |
504 | changed = 1; | |
12e41d03 DL |
505 | } |
506 | ||
4763cd0e | 507 | if (detect_secondary_address_change(ifp, force_prim_as_any, caller)) { |
508 | changed = 1; | |
509 | } | |
510 | ||
511 | ||
512 | if (changed) { | |
513 | if (!PIM_IF_TEST_PIM(pim_ifp->options)) { | |
514 | return; | |
515 | } | |
516 | ||
517 | pim_addr_change(ifp); | |
12e41d03 DL |
518 | } |
519 | ||
4763cd0e | 520 | /* XXX: if we have unnumbered interfaces we need to run detect address |
521 | * address change on all of them when the lo address changes */ | |
12e41d03 DL |
522 | } |
523 | ||
4763cd0e | 524 | int pim_update_source_set(struct interface *ifp, struct in_addr source) |
12e41d03 | 525 | { |
4763cd0e | 526 | struct pim_interface *pim_ifp = ifp->info; |
12e41d03 | 527 | |
4763cd0e | 528 | if (!pim_ifp) { |
529 | return PIM_IFACE_NOT_FOUND; | |
12e41d03 DL |
530 | } |
531 | ||
4763cd0e | 532 | if (pim_ifp->update_source.s_addr == source.s_addr) { |
533 | return PIM_UPDATE_SOURCE_DUP; | |
534 | } | |
535 | ||
536 | pim_ifp->update_source = source; | |
537 | detect_address_change(ifp, 0 /* force_prim_as_any */, | |
538 | __PRETTY_FUNCTION__); | |
539 | ||
540 | return PIM_SUCCESS; | |
12e41d03 DL |
541 | } |
542 | ||
543 | void pim_if_addr_add(struct connected *ifc) | |
544 | { | |
545 | struct pim_interface *pim_ifp; | |
546 | struct interface *ifp; | |
547 | struct in_addr ifaddr; | |
548 | ||
549 | zassert(ifc); | |
550 | ||
551 | ifp = ifc->ifp; | |
552 | zassert(ifp); | |
553 | pim_ifp = ifp->info; | |
554 | if (!pim_ifp) | |
555 | return; | |
556 | ||
557 | if (!if_is_operative(ifp)) | |
558 | return; | |
559 | ||
7adf0260 | 560 | if (PIM_DEBUG_ZEBRA) { |
12e41d03 DL |
561 | char buf[BUFSIZ]; |
562 | prefix2str(ifc->address, buf, BUFSIZ); | |
563 | zlog_debug("%s: %s ifindex=%d connected IP address %s %s", | |
564 | __PRETTY_FUNCTION__, | |
565 | ifp->name, ifp->ifindex, buf, | |
566 | CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY) ? | |
567 | "secondary" : "primary"); | |
568 | } | |
569 | ||
570 | ifaddr = ifc->address->u.prefix4; | |
571 | ||
572 | detect_address_change(ifp, 0, __PRETTY_FUNCTION__); | |
573 | ||
574 | if (PIM_IF_TEST_IGMP(pim_ifp->options)) { | |
575 | struct igmp_sock *igmp; | |
576 | ||
577 | /* lookup IGMP socket */ | |
578 | igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->igmp_socket_list, | |
579 | ifaddr); | |
580 | if (!igmp) { | |
581 | /* if addr new, add IGMP socket */ | |
582 | pim_igmp_sock_add(pim_ifp->igmp_socket_list, ifaddr, ifp); | |
583 | } | |
584 | } /* igmp */ | |
585 | ||
586 | if (PIM_IF_TEST_PIM(pim_ifp->options)) { | |
587 | ||
588 | /* Interface has a valid primary address ? */ | |
589 | if (PIM_INADDR_ISNOT_ANY(pim_ifp->primary_address)) { | |
590 | ||
591 | /* Interface has a valid socket ? */ | |
592 | if (pim_ifp->pim_sock_fd < 0) { | |
593 | if (pim_sock_add(ifp)) { | |
594 | zlog_warn("Failure creating PIM socket for interface %s", | |
595 | ifp->name); | |
596 | } | |
597 | } | |
598 | ||
599 | } | |
600 | } /* pim */ | |
601 | ||
12e41d03 DL |
602 | /* |
603 | PIM or IGMP is enabled on interface, and there is at least one | |
604 | address assigned, then try to create a vif_index. | |
605 | */ | |
b8d16be2 DS |
606 | if (pim_ifp->mroute_vif_index < 0) { |
607 | pim_if_add_vif(ifp); | |
12e41d03 | 608 | } |
b8d16be2 | 609 | pim_ifchannel_scan_forward_start (ifp); |
12e41d03 DL |
610 | } |
611 | ||
612 | static void pim_if_addr_del_igmp(struct connected *ifc) | |
613 | { | |
614 | struct pim_interface *pim_ifp = ifc->ifp->info; | |
615 | struct igmp_sock *igmp; | |
616 | struct in_addr ifaddr; | |
617 | ||
618 | if (ifc->address->family != AF_INET) { | |
619 | /* non-IPv4 address */ | |
620 | return; | |
621 | } | |
622 | ||
623 | if (!pim_ifp) { | |
624 | /* IGMP not enabled on interface */ | |
625 | return; | |
626 | } | |
627 | ||
628 | ifaddr = ifc->address->u.prefix4; | |
629 | ||
630 | /* lookup IGMP socket */ | |
631 | igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->igmp_socket_list, | |
632 | ifaddr); | |
633 | if (igmp) { | |
634 | /* if addr found, del IGMP socket */ | |
635 | igmp_sock_delete(igmp); | |
636 | } | |
637 | } | |
638 | ||
639 | static void pim_if_addr_del_pim(struct connected *ifc) | |
640 | { | |
641 | struct pim_interface *pim_ifp = ifc->ifp->info; | |
642 | ||
643 | if (ifc->address->family != AF_INET) { | |
644 | /* non-IPv4 address */ | |
645 | return; | |
646 | } | |
647 | ||
648 | if (!pim_ifp) { | |
649 | /* PIM not enabled on interface */ | |
650 | return; | |
651 | } | |
652 | ||
653 | if (PIM_INADDR_ISNOT_ANY(pim_ifp->primary_address)) { | |
654 | /* Interface keeps a valid primary address */ | |
655 | return; | |
656 | } | |
657 | ||
658 | if (pim_ifp->pim_sock_fd < 0) { | |
659 | /* Interface does not hold a valid socket any longer */ | |
660 | return; | |
661 | } | |
662 | ||
663 | /* | |
664 | pim_sock_delete() closes the socket, stops read and timer threads, | |
665 | and kills all neighbors. | |
666 | */ | |
667 | pim_sock_delete(ifc->ifp, "last address has been removed from interface"); | |
668 | } | |
669 | ||
670 | void pim_if_addr_del(struct connected *ifc, int force_prim_as_any) | |
671 | { | |
672 | struct interface *ifp; | |
673 | ||
674 | zassert(ifc); | |
675 | ifp = ifc->ifp; | |
676 | zassert(ifp); | |
677 | ||
7adf0260 | 678 | if (PIM_DEBUG_ZEBRA) { |
12e41d03 DL |
679 | char buf[BUFSIZ]; |
680 | prefix2str(ifc->address, buf, BUFSIZ); | |
681 | zlog_debug("%s: %s ifindex=%d disconnected IP address %s %s", | |
682 | __PRETTY_FUNCTION__, | |
683 | ifp->name, ifp->ifindex, buf, | |
684 | CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY) ? | |
685 | "secondary" : "primary"); | |
686 | } | |
687 | ||
688 | detect_address_change(ifp, force_prim_as_any, __PRETTY_FUNCTION__); | |
689 | ||
690 | pim_if_addr_del_igmp(ifc); | |
691 | pim_if_addr_del_pim(ifc); | |
692 | } | |
693 | ||
694 | void pim_if_addr_add_all(struct interface *ifp) | |
695 | { | |
696 | struct connected *ifc; | |
697 | struct listnode *node; | |
698 | struct listnode *nextnode; | |
d8424057 DS |
699 | int v4_addrs = 0; |
700 | int v6_addrs = 0; | |
7176984f | 701 | struct pim_interface *pim_ifp = ifp->info; |
702 | ||
12e41d03 DL |
703 | |
704 | /* PIM/IGMP enabled ? */ | |
7176984f | 705 | if (!pim_ifp) |
12e41d03 DL |
706 | return; |
707 | ||
708 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) { | |
709 | struct prefix *p = ifc->address; | |
710 | ||
711 | if (p->family != AF_INET) | |
d8424057 DS |
712 | { |
713 | v6_addrs++; | |
714 | continue; | |
715 | } | |
12e41d03 | 716 | |
d8424057 | 717 | v4_addrs++; |
12e41d03 DL |
718 | pim_if_addr_add(ifc); |
719 | } | |
d8424057 DS |
720 | |
721 | if (!v4_addrs && v6_addrs && !if_is_loopback (ifp)) | |
722 | { | |
7176984f | 723 | if (PIM_IF_TEST_PIM(pim_ifp->options)) { |
d8424057 DS |
724 | |
725 | /* Interface has a valid primary address ? */ | |
726 | if (PIM_INADDR_ISNOT_ANY(pim_ifp->primary_address)) { | |
727 | ||
728 | /* Interface has a valid socket ? */ | |
729 | if (pim_ifp->pim_sock_fd < 0) { | |
730 | if (pim_sock_add(ifp)) { | |
731 | zlog_warn("Failure creating PIM socket for interface %s", | |
732 | ifp->name); | |
733 | } | |
734 | } | |
735 | ||
736 | } | |
737 | } /* pim */ | |
738 | } | |
b8d16be2 DS |
739 | /* |
740 | * PIM or IGMP is enabled on interface, and there is at least one | |
741 | * address assigned, then try to create a vif_index. | |
742 | */ | |
743 | if (pim_ifp->mroute_vif_index < 0) { | |
744 | pim_if_add_vif(ifp); | |
ef71d1f8 | 745 | } |
b8d16be2 | 746 | pim_ifchannel_scan_forward_start (ifp); |
ef71d1f8 | 747 | |
da3dcffb | 748 | pim_rp_setup(); |
7176984f | 749 | pim_rp_check_on_if_add(pim_ifp); |
12e41d03 DL |
750 | } |
751 | ||
752 | void pim_if_addr_del_all(struct interface *ifp) | |
753 | { | |
754 | struct connected *ifc; | |
755 | struct listnode *node; | |
756 | struct listnode *nextnode; | |
757 | ||
758 | /* PIM/IGMP enabled ? */ | |
759 | if (!ifp->info) | |
760 | return; | |
761 | ||
762 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) { | |
763 | struct prefix *p = ifc->address; | |
764 | ||
765 | if (p->family != AF_INET) | |
766 | continue; | |
767 | ||
768 | pim_if_addr_del(ifc, 1 /* force_prim_as_any=true */); | |
769 | } | |
da3dcffb DS |
770 | |
771 | pim_rp_setup(); | |
7176984f | 772 | pim_i_am_rp_re_evaluate(); |
12e41d03 DL |
773 | } |
774 | ||
775 | void pim_if_addr_del_all_igmp(struct interface *ifp) | |
776 | { | |
777 | struct connected *ifc; | |
778 | struct listnode *node; | |
779 | struct listnode *nextnode; | |
780 | ||
781 | /* PIM/IGMP enabled ? */ | |
782 | if (!ifp->info) | |
783 | return; | |
784 | ||
785 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) { | |
786 | struct prefix *p = ifc->address; | |
787 | ||
788 | if (p->family != AF_INET) | |
789 | continue; | |
790 | ||
791 | pim_if_addr_del_igmp(ifc); | |
792 | } | |
793 | } | |
794 | ||
795 | void pim_if_addr_del_all_pim(struct interface *ifp) | |
796 | { | |
797 | struct connected *ifc; | |
798 | struct listnode *node; | |
799 | struct listnode *nextnode; | |
800 | ||
801 | /* PIM/IGMP enabled ? */ | |
802 | if (!ifp->info) | |
803 | return; | |
804 | ||
805 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) { | |
806 | struct prefix *p = ifc->address; | |
807 | ||
808 | if (p->family != AF_INET) | |
809 | continue; | |
810 | ||
811 | pim_if_addr_del_pim(ifc); | |
812 | } | |
813 | } | |
814 | ||
89f1d91e DS |
815 | struct in_addr |
816 | pim_find_primary_addr (struct interface *ifp) | |
12e41d03 DL |
817 | { |
818 | struct connected *ifc; | |
819 | struct listnode *node; | |
820 | struct in_addr addr; | |
d8424057 DS |
821 | int v4_addrs = 0; |
822 | int v6_addrs = 0; | |
4763cd0e | 823 | struct pim_interface *pim_ifp = ifp->info; |
824 | ||
825 | if (pim_ifp && PIM_INADDR_ISNOT_ANY(pim_ifp->update_source)) { | |
826 | return pim_ifp->update_source; | |
827 | } | |
12e41d03 DL |
828 | |
829 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) { | |
830 | struct prefix *p = ifc->address; | |
d8424057 | 831 | |
12e41d03 | 832 | if (p->family != AF_INET) |
d8424057 DS |
833 | { |
834 | v6_addrs++; | |
835 | continue; | |
836 | } | |
12e41d03 DL |
837 | |
838 | if (PIM_INADDR_IS_ANY(p->u.prefix4)) { | |
839 | zlog_warn("%s: null IPv4 address connected to interface %s", | |
840 | __PRETTY_FUNCTION__, ifp->name); | |
841 | continue; | |
842 | } | |
843 | ||
d8424057 DS |
844 | v4_addrs++; |
845 | ||
12e41d03 DL |
846 | if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY)) |
847 | continue; | |
848 | ||
849 | return p->u.prefix4; | |
850 | } | |
851 | ||
d8424057 DS |
852 | /* |
853 | * If we have no v4_addrs and v6 is configured | |
854 | * We probably are using unnumbered | |
855 | * So let's grab the loopbacks v4 address | |
856 | * and use that as the primary address | |
857 | */ | |
858 | if (!v4_addrs && v6_addrs && !if_is_loopback (ifp)) | |
859 | { | |
860 | struct interface *lo_ifp; | |
861 | lo_ifp = if_lookup_by_name_vrf ("lo", VRF_DEFAULT); | |
862 | if (lo_ifp) | |
863 | return pim_find_primary_addr (lo_ifp); | |
864 | } | |
865 | ||
12e41d03 DL |
866 | addr.s_addr = PIM_NET_INADDR_ANY; |
867 | ||
868 | return addr; | |
869 | } | |
870 | ||
9df99407 | 871 | static int |
744d91b3 DS |
872 | pim_iface_next_vif_index (struct interface *ifp) |
873 | { | |
dc0665f1 | 874 | int i; |
744d91b3 DS |
875 | /* |
876 | * The pimreg vif is always going to be in index 0 | |
877 | * of the table. | |
878 | */ | |
879 | if (ifp->ifindex == PIM_OIF_PIM_REGISTER_VIF) | |
880 | return 0; | |
881 | ||
dc0665f1 DS |
882 | for (i = 1 ; i < MAXVIFS; i++) |
883 | { | |
884 | if (pim_iface_vif_index[i] == 0) | |
885 | return i; | |
886 | } | |
887 | return MAXVIFS; | |
744d91b3 DS |
888 | } |
889 | ||
12e41d03 DL |
890 | /* |
891 | pim_if_add_vif() uses ifindex as vif_index | |
892 | ||
893 | see also pim_if_find_vifindex_by_ifindex() | |
894 | */ | |
895 | int pim_if_add_vif(struct interface *ifp) | |
896 | { | |
897 | struct pim_interface *pim_ifp = ifp->info; | |
898 | struct in_addr ifaddr; | |
b3f2bf7c | 899 | unsigned char flags = 0; |
12e41d03 DL |
900 | |
901 | zassert(pim_ifp); | |
902 | ||
903 | if (pim_ifp->mroute_vif_index > 0) { | |
904 | zlog_warn("%s: vif_index=%d > 0 on interface %s ifindex=%d", | |
905 | __PRETTY_FUNCTION__, | |
906 | pim_ifp->mroute_vif_index, ifp->name, ifp->ifindex); | |
907 | return -1; | |
908 | } | |
909 | ||
e34a317a | 910 | if (ifp->ifindex < 0) { |
12e41d03 DL |
911 | zlog_warn("%s: ifindex=%d < 1 on interface %s", |
912 | __PRETTY_FUNCTION__, | |
913 | ifp->ifindex, ifp->name); | |
914 | return -2; | |
915 | } | |
916 | ||
12e41d03 | 917 | ifaddr = pim_ifp->primary_address; |
c992c9a0 | 918 | if (ifp->ifindex != PIM_OIF_PIM_REGISTER_VIF && PIM_INADDR_IS_ANY(ifaddr)) { |
12e41d03 DL |
919 | zlog_warn("%s: could not get address for interface %s ifindex=%d", |
920 | __PRETTY_FUNCTION__, | |
921 | ifp->name, ifp->ifindex); | |
922 | return -4; | |
923 | } | |
924 | ||
744d91b3 DS |
925 | pim_ifp->mroute_vif_index = pim_iface_next_vif_index (ifp); |
926 | ||
927 | if (pim_ifp->mroute_vif_index >= MAXVIFS) | |
928 | { | |
929 | zlog_warn("%s: Attempting to configure more than MAXVIFS=%d on pim enabled interface %s", | |
930 | __PRETTY_FUNCTION__, | |
931 | MAXVIFS, ifp->name); | |
932 | return -3; | |
933 | } | |
934 | ||
b3f2bf7c RW |
935 | if (ifp->ifindex == PIM_OIF_PIM_REGISTER_VIF) |
936 | flags = VIFF_REGISTER; | |
937 | #ifdef VIFF_USE_IFINDEX | |
938 | else | |
939 | flags = VIFF_USE_IFINDEX; | |
940 | #endif | |
941 | ||
744d91b3 | 942 | if (pim_mroute_add_vif(ifp, ifaddr, flags)) { |
12e41d03 DL |
943 | /* pim_mroute_add_vif reported error */ |
944 | return -5; | |
945 | } | |
946 | ||
dc0665f1 | 947 | pim_iface_vif_index[pim_ifp->mroute_vif_index] = 1; |
12e41d03 DL |
948 | return 0; |
949 | } | |
950 | ||
12e41d03 DL |
951 | int pim_if_del_vif(struct interface *ifp) |
952 | { | |
953 | struct pim_interface *pim_ifp = ifp->info; | |
12e41d03 DL |
954 | |
955 | if (pim_ifp->mroute_vif_index < 1) { | |
956 | zlog_warn("%s: vif_index=%d < 1 on interface %s ifindex=%d", | |
957 | __PRETTY_FUNCTION__, | |
958 | pim_ifp->mroute_vif_index, ifp->name, ifp->ifindex); | |
959 | return -1; | |
960 | } | |
961 | ||
429a291b | 962 | pim_mroute_del_vif(pim_ifp->mroute_vif_index); |
12e41d03 DL |
963 | |
964 | /* | |
dc0665f1 | 965 | Update vif_index |
12e41d03 | 966 | */ |
dc0665f1 | 967 | pim_iface_vif_index[pim_ifp->mroute_vif_index] = 0; |
12e41d03 DL |
968 | |
969 | pim_ifp->mroute_vif_index = -1; | |
970 | ||
12e41d03 DL |
971 | return 0; |
972 | } | |
973 | ||
974 | void pim_if_add_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_add_vif(ifp); | |
985 | } | |
986 | } | |
987 | ||
988 | void pim_if_del_vif_all() | |
989 | { | |
990 | struct listnode *ifnode; | |
991 | struct listnode *ifnextnode; | |
992 | struct interface *ifp; | |
993 | ||
469351b3 | 994 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
995 | if (!ifp->info) |
996 | continue; | |
997 | ||
998 | pim_if_del_vif(ifp); | |
999 | } | |
1000 | } | |
1001 | ||
b892f1dd | 1002 | struct interface *pim_if_find_by_vif_index(ifindex_t vif_index) |
12e41d03 DL |
1003 | { |
1004 | struct listnode *ifnode; | |
1005 | struct interface *ifp; | |
1006 | ||
ae90dfbb DS |
1007 | if (vif_index == 0) |
1008 | return if_lookup_by_name_vrf ("pimreg", VRF_DEFAULT); | |
1009 | ||
469351b3 | 1010 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), ifnode, ifp)) { |
12e41d03 DL |
1011 | if (ifp->info) { |
1012 | struct pim_interface *pim_ifp; | |
1013 | pim_ifp = ifp->info; | |
b892f1dd | 1014 | |
12e41d03 DL |
1015 | if (vif_index == pim_ifp->mroute_vif_index) |
1016 | return ifp; | |
1017 | } | |
1018 | } | |
1019 | ||
1020 | return 0; | |
1021 | } | |
1022 | ||
1023 | /* | |
1024 | pim_if_add_vif() uses ifindex as vif_index | |
1025 | */ | |
b892f1dd | 1026 | int pim_if_find_vifindex_by_ifindex(ifindex_t ifindex) |
12e41d03 | 1027 | { |
ae90dfbb DS |
1028 | struct pim_interface *pim_ifp; |
1029 | struct interface *ifp; | |
1030 | ||
7e2b7603 | 1031 | ifp = if_lookup_by_index (ifindex, VRF_DEFAULT); |
28185336 | 1032 | if (!ifp || !ifp->info) |
ae90dfbb | 1033 | return -1; |
28185336 | 1034 | pim_ifp = ifp->info; |
ae90dfbb DS |
1035 | |
1036 | return pim_ifp->mroute_vif_index; | |
12e41d03 DL |
1037 | } |
1038 | ||
1039 | int pim_if_lan_delay_enabled(struct interface *ifp) | |
1040 | { | |
1041 | struct pim_interface *pim_ifp; | |
1042 | ||
1043 | pim_ifp = ifp->info; | |
1044 | zassert(pim_ifp); | |
1045 | zassert(pim_ifp->pim_number_of_nonlandelay_neighbors >= 0); | |
1046 | ||
1047 | return pim_ifp->pim_number_of_nonlandelay_neighbors == 0; | |
1048 | } | |
1049 | ||
1050 | uint16_t pim_if_effective_propagation_delay_msec(struct interface *ifp) | |
1051 | { | |
1052 | if (pim_if_lan_delay_enabled(ifp)) { | |
1053 | struct pim_interface *pim_ifp; | |
1054 | pim_ifp = ifp->info; | |
1055 | return pim_ifp->pim_neighbors_highest_propagation_delay_msec; | |
1056 | } | |
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 | } | |
1069 | else { | |
1070 | return PIM_DEFAULT_OVERRIDE_INTERVAL_MSEC; | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | int pim_if_t_override_msec(struct interface *ifp) | |
1075 | { | |
1076 | int effective_override_interval_msec; | |
1077 | int t_override_msec; | |
1078 | ||
1079 | effective_override_interval_msec = | |
1080 | pim_if_effective_override_interval_msec(ifp); | |
1081 | ||
60b40924 | 1082 | t_override_msec = random() % (effective_override_interval_msec + 1); |
12e41d03 DL |
1083 | |
1084 | return t_override_msec; | |
1085 | } | |
1086 | ||
1087 | uint16_t pim_if_jp_override_interval_msec(struct interface *ifp) | |
1088 | { | |
1089 | return pim_if_effective_propagation_delay_msec(ifp) + | |
1090 | pim_if_effective_override_interval_msec(ifp); | |
1091 | } | |
1092 | ||
1093 | /* | |
1094 | RFC 4601: 4.1.6. State Summarization Macros | |
1095 | ||
1096 | The function NBR( I, A ) uses information gathered through PIM Hello | |
1097 | messages to map the IP address A of a directly connected PIM | |
1098 | neighbor router on interface I to the primary IP address of the same | |
1099 | router (Section 4.3.4). The primary IP address of a neighbor is the | |
1100 | address that it uses as the source of its PIM Hello messages. | |
1101 | */ | |
1102 | struct pim_neighbor *pim_if_find_neighbor(struct interface *ifp, | |
1103 | struct in_addr addr) | |
1104 | { | |
1105 | struct listnode *neighnode; | |
1106 | struct pim_neighbor *neigh; | |
1107 | struct pim_interface *pim_ifp; | |
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__, | |
1115 | ifp->name); | |
1116 | return 0; | |
1117 | } | |
1118 | ||
1119 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->pim_neighbor_list, neighnode, neigh)) { | |
1120 | ||
1121 | /* primary address ? */ | |
1122 | if (neigh->source_addr.s_addr == addr.s_addr) | |
1123 | return neigh; | |
1124 | ||
1125 | /* secondary address ? */ | |
1126 | if (pim_neighbor_find_secondary(neigh, addr)) | |
1127 | return neigh; | |
1128 | } | |
1129 | ||
1130 | if (PIM_DEBUG_PIM_TRACE) { | |
eaa54bdb | 1131 | char addr_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
1132 | pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str)); |
1133 | zlog_debug("%s: neighbor not found for address %s on interface %s", | |
1134 | __PRETTY_FUNCTION__, | |
1135 | addr_str, ifp->name); | |
1136 | } | |
1137 | ||
ff67a923 | 1138 | return NULL; |
12e41d03 DL |
1139 | } |
1140 | ||
1141 | long pim_if_t_suppressed_msec(struct interface *ifp) | |
1142 | { | |
1143 | struct pim_interface *pim_ifp; | |
1144 | long t_suppressed_msec; | |
60b40924 | 1145 | uint32_t ramount = 0; |
12e41d03 DL |
1146 | |
1147 | pim_ifp = ifp->info; | |
1148 | zassert(pim_ifp); | |
1149 | ||
1150 | /* join suppression disabled ? */ | |
1151 | if (PIM_IF_TEST_PIM_CAN_DISABLE_JOIN_SUPRESSION(pim_ifp->options)) | |
1152 | return 0; | |
1153 | ||
1154 | /* t_suppressed = t_periodic * rand(1.1, 1.4) */ | |
60b40924 DS |
1155 | ramount = 1100 + (random() % (1400 - 1100 + 1)); |
1156 | t_suppressed_msec = qpim_t_periodic * ramount; | |
12e41d03 DL |
1157 | |
1158 | return t_suppressed_msec; | |
1159 | } | |
1160 | ||
1161 | static void igmp_join_free(struct igmp_join *ij) | |
1162 | { | |
1163 | XFREE(MTYPE_PIM_IGMP_JOIN, ij); | |
1164 | } | |
1165 | ||
1166 | static struct igmp_join *igmp_join_find(struct list *join_list, | |
1167 | struct in_addr group_addr, | |
1168 | struct in_addr source_addr) | |
1169 | { | |
1170 | struct listnode *node; | |
1171 | struct igmp_join *ij; | |
1172 | ||
1173 | zassert(join_list); | |
1174 | ||
1175 | for (ALL_LIST_ELEMENTS_RO(join_list, node, ij)) { | |
1176 | if ((group_addr.s_addr == ij->group_addr.s_addr) && | |
1177 | (source_addr.s_addr == ij->source_addr.s_addr)) | |
1178 | return ij; | |
1179 | } | |
1180 | ||
1181 | return 0; | |
1182 | } | |
1183 | ||
1184 | static int igmp_join_sock(const char *ifname, | |
b892f1dd | 1185 | ifindex_t ifindex, |
12e41d03 DL |
1186 | struct in_addr group_addr, |
1187 | struct in_addr source_addr) | |
1188 | { | |
1189 | int join_fd; | |
1190 | ||
1191 | join_fd = pim_socket_raw(IPPROTO_IGMP); | |
1192 | if (join_fd < 0) { | |
1193 | return -1; | |
1194 | } | |
1195 | ||
1196 | if (pim_socket_join_source(join_fd, ifindex, group_addr, source_addr, ifname)) { | |
1197 | close(join_fd); | |
1198 | return -2; | |
1199 | } | |
1200 | ||
1201 | return join_fd; | |
1202 | } | |
1203 | ||
1204 | static struct igmp_join *igmp_join_new(struct interface *ifp, | |
1205 | struct in_addr group_addr, | |
1206 | struct in_addr source_addr) | |
1207 | { | |
1208 | struct pim_interface *pim_ifp; | |
1209 | struct igmp_join *ij; | |
1210 | int join_fd; | |
1211 | ||
1212 | pim_ifp = ifp->info; | |
1213 | zassert(pim_ifp); | |
1214 | ||
1215 | join_fd = igmp_join_sock(ifp->name, ifp->ifindex, group_addr, source_addr); | |
1216 | if (join_fd < 0) { | |
eaa54bdb DW |
1217 | char group_str[INET_ADDRSTRLEN]; |
1218 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1219 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1220 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1221 | zlog_warn("%s: igmp_join_sock() failure for IGMP group %s source %s on interface %s", | |
1222 | __PRETTY_FUNCTION__, | |
1223 | group_str, source_str, ifp->name); | |
1224 | return 0; | |
1225 | } | |
1226 | ||
36d9e7dc | 1227 | ij = XCALLOC(MTYPE_PIM_IGMP_JOIN, sizeof(*ij)); |
12e41d03 | 1228 | if (!ij) { |
eaa54bdb DW |
1229 | char group_str[INET_ADDRSTRLEN]; |
1230 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1231 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1232 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
36d9e7dc | 1233 | zlog_err("%s: XCALLOC(%zu) failure for IGMP group %s source %s on interface %s", |
12e41d03 DL |
1234 | __PRETTY_FUNCTION__, |
1235 | sizeof(*ij), group_str, source_str, ifp->name); | |
1236 | close(join_fd); | |
1237 | return 0; | |
1238 | } | |
1239 | ||
1240 | ij->sock_fd = join_fd; | |
1241 | ij->group_addr = group_addr; | |
1242 | ij->source_addr = source_addr; | |
1243 | ij->sock_creation = pim_time_monotonic_sec(); | |
1244 | ||
1245 | listnode_add(pim_ifp->igmp_join_list, ij); | |
1246 | ||
1247 | return ij; | |
1248 | } | |
1249 | ||
1250 | int pim_if_igmp_join_add(struct interface *ifp, | |
1251 | struct in_addr group_addr, | |
1252 | struct in_addr source_addr) | |
1253 | { | |
1254 | struct pim_interface *pim_ifp; | |
1255 | struct igmp_join *ij; | |
1256 | ||
1257 | pim_ifp = ifp->info; | |
1258 | if (!pim_ifp) { | |
1259 | zlog_warn("%s: multicast not enabled on interface %s", | |
1260 | __PRETTY_FUNCTION__, | |
1261 | ifp->name); | |
1262 | return -1; | |
1263 | } | |
1264 | ||
1265 | if (!pim_ifp->igmp_join_list) { | |
1266 | pim_ifp->igmp_join_list = list_new(); | |
1267 | if (!pim_ifp->igmp_join_list) { | |
1268 | zlog_err("%s %s: failure: igmp_join_list=list_new()", | |
1269 | __FILE__, __PRETTY_FUNCTION__); | |
1270 | return -2; | |
1271 | } | |
1272 | pim_ifp->igmp_join_list->del = (void (*)(void *)) igmp_join_free; | |
1273 | } | |
1274 | ||
1275 | ij = igmp_join_find(pim_ifp->igmp_join_list, group_addr, source_addr); | |
1276 | if (ij) { | |
eaa54bdb DW |
1277 | char group_str[INET_ADDRSTRLEN]; |
1278 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1279 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1280 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1281 | zlog_warn("%s: can't re-join existing IGMP group %s source %s on interface %s", | |
1282 | __PRETTY_FUNCTION__, | |
1283 | group_str, source_str, ifp->name); | |
1284 | return -3; | |
1285 | } | |
1286 | ||
1287 | ij = igmp_join_new(ifp, group_addr, source_addr); | |
1288 | if (!ij) { | |
eaa54bdb DW |
1289 | char group_str[INET_ADDRSTRLEN]; |
1290 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1291 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1292 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1293 | zlog_warn("%s: igmp_join_new() failure for IGMP group %s source %s on interface %s", | |
1294 | __PRETTY_FUNCTION__, | |
1295 | group_str, source_str, ifp->name); | |
1296 | return -4; | |
1297 | } | |
1298 | ||
7adf0260 | 1299 | if (PIM_DEBUG_IGMP_EVENTS) { |
eaa54bdb DW |
1300 | char group_str[INET_ADDRSTRLEN]; |
1301 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1302 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1303 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1304 | zlog_debug("%s: issued static igmp join for channel (S,G)=(%s,%s) on interface %s", | |
7adf0260 DS |
1305 | __PRETTY_FUNCTION__, |
1306 | source_str, group_str, ifp->name); | |
12e41d03 DL |
1307 | } |
1308 | ||
1309 | return 0; | |
1310 | } | |
1311 | ||
1312 | ||
1313 | ||
1314 | int pim_if_igmp_join_del(struct interface *ifp, | |
1315 | struct in_addr group_addr, | |
1316 | struct in_addr source_addr) | |
1317 | { | |
1318 | struct pim_interface *pim_ifp; | |
1319 | struct igmp_join *ij; | |
1320 | ||
1321 | pim_ifp = ifp->info; | |
1322 | if (!pim_ifp) { | |
1323 | zlog_warn("%s: multicast not enabled on interface %s", | |
1324 | __PRETTY_FUNCTION__, | |
1325 | ifp->name); | |
1326 | return -1; | |
1327 | } | |
1328 | ||
1329 | if (!pim_ifp->igmp_join_list) { | |
1330 | zlog_warn("%s: no IGMP join on interface %s", | |
1331 | __PRETTY_FUNCTION__, | |
1332 | ifp->name); | |
1333 | return -2; | |
1334 | } | |
1335 | ||
1336 | ij = igmp_join_find(pim_ifp->igmp_join_list, group_addr, source_addr); | |
1337 | if (!ij) { | |
eaa54bdb DW |
1338 | char group_str[INET_ADDRSTRLEN]; |
1339 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1340 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1341 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1342 | zlog_warn("%s: could not find IGMP group %s source %s on interface %s", | |
1343 | __PRETTY_FUNCTION__, | |
1344 | group_str, source_str, ifp->name); | |
1345 | return -3; | |
1346 | } | |
1347 | ||
1348 | if (close(ij->sock_fd)) { | |
eaa54bdb DW |
1349 | char group_str[INET_ADDRSTRLEN]; |
1350 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1351 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1352 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1353 | zlog_warn("%s: failure closing sock_fd=%d for IGMP group %s source %s on interface %s: errno=%d: %s", | |
1354 | __PRETTY_FUNCTION__, | |
3d7765d7 | 1355 | ij->sock_fd, group_str, source_str, ifp->name, errno, safe_strerror(errno)); |
12e41d03 DL |
1356 | /* warning only */ |
1357 | } | |
1358 | listnode_delete(pim_ifp->igmp_join_list, ij); | |
1359 | igmp_join_free(ij); | |
1360 | if (listcount(pim_ifp->igmp_join_list) < 1) { | |
1361 | list_delete(pim_ifp->igmp_join_list); | |
1362 | pim_ifp->igmp_join_list = 0; | |
1363 | } | |
1364 | ||
1365 | return 0; | |
1366 | } | |
1367 | ||
1368 | static void pim_if_igmp_join_del_all(struct interface *ifp) | |
1369 | { | |
1370 | struct pim_interface *pim_ifp; | |
1371 | struct listnode *node; | |
1372 | struct listnode *nextnode; | |
1373 | struct igmp_join *ij; | |
1374 | ||
1375 | pim_ifp = ifp->info; | |
1376 | if (!pim_ifp) { | |
1377 | zlog_warn("%s: multicast not enabled on interface %s", | |
1378 | __PRETTY_FUNCTION__, | |
1379 | ifp->name); | |
1380 | return; | |
1381 | } | |
1382 | ||
1383 | if (!pim_ifp->igmp_join_list) | |
1384 | return; | |
1385 | ||
1386 | for (ALL_LIST_ELEMENTS(pim_ifp->igmp_join_list, node, nextnode, ij)) | |
1387 | pim_if_igmp_join_del(ifp, ij->group_addr, ij->source_addr); | |
1388 | } | |
1389 | ||
1390 | /* | |
1391 | RFC 4601 | |
1392 | ||
1393 | Transitions from "I am Assert Loser" State | |
1394 | ||
1395 | Current Winner's GenID Changes or NLT Expires | |
1396 | ||
1397 | The Neighbor Liveness Timer associated with the current winner | |
1398 | expires or we receive a Hello message from the current winner | |
1399 | reporting a different GenID from the one it previously reported. | |
1400 | This indicates that the current winner's interface or router has | |
1401 | gone down (and may have come back up), and so we must assume it no | |
1402 | longer knows it was the winner. | |
1403 | */ | |
1404 | void pim_if_assert_on_neighbor_down(struct interface *ifp, | |
1405 | struct in_addr neigh_addr) | |
1406 | { | |
1407 | struct pim_interface *pim_ifp; | |
1408 | struct listnode *node; | |
1409 | struct listnode *next_node; | |
1410 | struct pim_ifchannel *ch; | |
1411 | ||
1412 | pim_ifp = ifp->info; | |
1413 | zassert(pim_ifp); | |
1414 | ||
1415 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, node, next_node, ch)) { | |
1416 | /* Is (S,G,I) assert loser ? */ | |
1417 | if (ch->ifassert_state != PIM_IFASSERT_I_AM_LOSER) | |
1418 | continue; | |
1419 | /* Dead neighbor was winner ? */ | |
1420 | if (ch->ifassert_winner.s_addr != neigh_addr.s_addr) | |
1421 | continue; | |
1422 | ||
1423 | assert_action_a5(ch); | |
1424 | } | |
1425 | } | |
1426 | ||
1427 | void pim_if_update_join_desired(struct pim_interface *pim_ifp) | |
1428 | { | |
1429 | struct listnode *ch_node; | |
1430 | struct pim_ifchannel *ch; | |
1431 | ||
1432 | /* clear off flag from interface's upstreams */ | |
1433 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->pim_ifchannel_list, ch_node, ch)) { | |
1434 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED_UPDATED(ch->upstream->flags); | |
1435 | } | |
1436 | ||
1437 | /* scan per-interface (S,G,I) state on this I interface */ | |
1438 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->pim_ifchannel_list, ch_node, ch)) { | |
1439 | struct pim_upstream *up = ch->upstream; | |
1440 | ||
1441 | if (PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED_UPDATED(up->flags)) | |
1442 | continue; | |
1443 | ||
1444 | /* update join_desired for the global (S,G) state */ | |
1445 | pim_upstream_update_join_desired(up); | |
1446 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED_UPDATED(up->flags); | |
1447 | } | |
1448 | } | |
1449 | ||
1450 | void pim_if_update_assert_tracking_desired(struct interface *ifp) | |
1451 | { | |
1452 | struct pim_interface *pim_ifp; | |
1453 | struct listnode *node; | |
1454 | struct listnode *next_node; | |
1455 | struct pim_ifchannel *ch; | |
1456 | ||
1457 | pim_ifp = ifp->info; | |
1458 | if (!pim_ifp) | |
1459 | return; | |
1460 | ||
1461 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, node, next_node, ch)) { | |
1462 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1463 | } | |
1464 | } | |
c992c9a0 DS |
1465 | |
1466 | /* | |
1467 | * PIM wants to have an interface pointer for everything it does. | |
1468 | * The pimreg is a special interface that we have that is not | |
1469 | * quite an inteface but a VIF is created for it. | |
1470 | */ | |
1471 | void pim_if_create_pimreg (void) | |
1472 | { | |
1473 | if (!pim_regiface) { | |
1474 | pim_regiface = if_create("pimreg", strlen("pimreg")); | |
1475 | pim_regiface->ifindex = PIM_OIF_PIM_REGISTER_VIF; | |
1476 | ||
1477 | pim_if_new(pim_regiface, 0, 0); | |
1478 | } | |
1479 | } | |
3565202d DS |
1480 | |
1481 | int | |
1482 | pim_if_connected_to_source (struct interface *ifp, struct in_addr src) | |
1483 | { | |
1484 | struct listnode *cnode; | |
1485 | struct connected *c; | |
1486 | struct prefix p; | |
1487 | ||
1488 | p.family = AF_INET; | |
1489 | p.u.prefix4 = src; | |
1490 | p.prefixlen = IPV4_MAX_BITLEN; | |
1491 | ||
1492 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, c)) | |
1493 | { | |
1494 | if ((c->address->family == AF_INET) && | |
1495 | prefix_match (CONNECTED_PREFIX (c), &p)) | |
1496 | { | |
1497 | return 1; | |
1498 | } | |
1499 | } | |
1500 | ||
1501 | return 0; | |
1502 | } | |
9f0edbc9 DS |
1503 | |
1504 | struct interface * | |
1505 | pim_if_lookup_address_vrf (struct in_addr src, vrf_id_t vrf_id) | |
1506 | { | |
1507 | struct listnode *ifnode; | |
1508 | struct interface *ifp; | |
1509 | ||
1510 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist(vrf_id), ifnode, ifp)) | |
1511 | { | |
1512 | if (pim_if_connected_to_source (ifp, src) && ifp->info) | |
1513 | return ifp; | |
1514 | } | |
1515 | return NULL; | |
1516 | } |