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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 | ||
12e41d03 DL |
187 | if (PIM_MROUTE_IS_ENABLED) { |
188 | pim_if_add_vif(ifp); | |
189 | } | |
190 | ||
191 | return pim_ifp; | |
192 | } | |
193 | ||
194 | void pim_if_delete(struct interface *ifp) | |
195 | { | |
196 | struct pim_interface *pim_ifp; | |
197 | ||
198 | zassert(ifp); | |
199 | pim_ifp = ifp->info; | |
200 | zassert(pim_ifp); | |
201 | ||
202 | if (pim_ifp->igmp_join_list) { | |
203 | pim_if_igmp_join_del_all(ifp); | |
204 | } | |
12e41d03 | 205 | |
cb24fec4 DS |
206 | pim_ifchannel_delete_all (ifp); |
207 | igmp_sock_delete_all (ifp); | |
12e41d03 | 208 | |
cb24fec4 | 209 | pim_neighbor_delete_all (ifp, "Interface removed from configuration"); |
12e41d03 DL |
210 | |
211 | if (PIM_MROUTE_IS_ENABLED) { | |
212 | pim_if_del_vif(ifp); | |
213 | } | |
214 | ||
215 | list_delete(pim_ifp->igmp_socket_list); | |
216 | list_delete(pim_ifp->pim_neighbor_list); | |
982bff89 | 217 | list_delete(pim_ifp->upstream_switch_list); |
12e41d03 DL |
218 | list_delete(pim_ifp->pim_ifchannel_list); |
219 | ||
a625e937 DS |
220 | hash_free (pim_ifp->pim_ifchannel_hash); |
221 | ||
12e41d03 DL |
222 | XFREE(MTYPE_PIM_INTERFACE, pim_ifp); |
223 | ||
59ba0ac3 | 224 | ifp->info = NULL; |
12e41d03 DL |
225 | } |
226 | ||
227 | void pim_if_update_could_assert(struct interface *ifp) | |
228 | { | |
229 | struct pim_interface *pim_ifp; | |
230 | struct listnode *node; | |
231 | struct listnode *next_node; | |
232 | struct pim_ifchannel *ch; | |
233 | ||
234 | pim_ifp = ifp->info; | |
235 | zassert(pim_ifp); | |
236 | ||
237 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, node, next_node, ch)) { | |
238 | pim_ifchannel_update_could_assert(ch); | |
239 | } | |
240 | } | |
241 | ||
242 | static void pim_if_update_my_assert_metric(struct interface *ifp) | |
243 | { | |
244 | struct pim_interface *pim_ifp; | |
245 | struct listnode *node; | |
246 | struct listnode *next_node; | |
247 | struct pim_ifchannel *ch; | |
248 | ||
249 | pim_ifp = ifp->info; | |
250 | zassert(pim_ifp); | |
251 | ||
252 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, node, next_node, ch)) { | |
253 | pim_ifchannel_update_my_assert_metric(ch); | |
254 | } | |
255 | } | |
256 | ||
257 | static void pim_addr_change(struct interface *ifp) | |
258 | { | |
259 | struct pim_interface *pim_ifp; | |
260 | ||
261 | pim_ifp = ifp->info; | |
262 | zassert(pim_ifp); | |
263 | ||
264 | pim_if_dr_election(ifp); /* router's own DR Priority (addr) changes -- Done TODO T30 */ | |
265 | pim_if_update_join_desired(pim_ifp); /* depends on DR */ | |
266 | pim_if_update_could_assert(ifp); /* depends on DR */ | |
267 | pim_if_update_my_assert_metric(ifp); /* depends on could_assert */ | |
268 | pim_if_update_assert_tracking_desired(ifp); /* depends on DR, join_desired */ | |
269 | ||
270 | /* | |
271 | RFC 4601: 4.3.1. Sending Hello Messages | |
272 | ||
273 | 1) Before an interface goes down or changes primary IP address, a | |
274 | Hello message with a zero HoldTime should be sent immediately | |
275 | (with the old IP address if the IP address changed). | |
276 | -- FIXME See CAVEAT C13 | |
277 | ||
278 | 2) After an interface has changed its IP address, it MUST send a | |
279 | Hello message with its new IP address. | |
280 | -- DONE below | |
281 | ||
282 | 3) If an interface changes one of its secondary IP addresses, a | |
283 | Hello message with an updated Address_List option and a non-zero | |
284 | HoldTime should be sent immediately. | |
285 | -- FIXME See TODO T31 | |
286 | */ | |
287 | pim_ifp->pim_ifstat_hello_sent = 0; /* reset hello counter */ | |
288 | if (pim_ifp->pim_sock_fd < 0) | |
289 | return; | |
290 | pim_hello_restart_now(ifp); /* send hello and restart timer */ | |
291 | } | |
292 | ||
12e41d03 DL |
293 | static int detect_primary_address_change(struct interface *ifp, |
294 | int force_prim_as_any, | |
295 | const char *caller) | |
296 | { | |
4763cd0e | 297 | struct pim_interface *pim_ifp = ifp->info; |
12e41d03 DL |
298 | struct in_addr new_prim_addr; |
299 | int changed; | |
300 | ||
12e41d03 DL |
301 | if (force_prim_as_any) |
302 | new_prim_addr = qpim_inaddr_any; | |
303 | else | |
304 | new_prim_addr = pim_find_primary_addr(ifp); | |
305 | ||
306 | changed = new_prim_addr.s_addr != pim_ifp->primary_address.s_addr; | |
307 | ||
308 | if (PIM_DEBUG_ZEBRA) { | |
eaa54bdb DW |
309 | char new_prim_str[INET_ADDRSTRLEN]; |
310 | char old_prim_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
311 | pim_inet4_dump("<new?>", new_prim_addr, new_prim_str, sizeof(new_prim_str)); |
312 | pim_inet4_dump("<old?>", pim_ifp->primary_address, old_prim_str, sizeof(old_prim_str)); | |
313 | zlog_debug("%s: old=%s new=%s on interface %s: %s", | |
314 | __PRETTY_FUNCTION__, | |
315 | old_prim_str, new_prim_str, ifp->name, | |
316 | changed ? "changed" : "unchanged"); | |
317 | } | |
318 | ||
319 | if (changed) { | |
12e41d03 | 320 | pim_ifp->primary_address = new_prim_addr; |
12e41d03 DL |
321 | } |
322 | ||
323 | return changed; | |
324 | } | |
325 | ||
7176984f | 326 | static int pim_sec_addr_comp(const void *p1, const void *p2) |
327 | { | |
328 | const struct pim_secondary_addr *sec1 = p1; | |
329 | const struct pim_secondary_addr *sec2 = p2; | |
330 | ||
331 | if (ntohl(sec1->addr.s_addr) < ntohl(sec2->addr.s_addr)) | |
332 | return -1; | |
333 | ||
334 | if (ntohl(sec1->addr.s_addr) > ntohl(sec2->addr.s_addr)) | |
335 | return 1; | |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
340 | static void pim_sec_addr_free(struct pim_secondary_addr *sec_addr) | |
341 | { | |
342 | XFREE(MTYPE_PIM_SEC_ADDR, sec_addr); | |
343 | } | |
344 | ||
345 | static struct pim_secondary_addr * | |
346 | pim_sec_addr_find(struct pim_interface *pim_ifp, struct in_addr addr) | |
347 | { | |
348 | struct pim_secondary_addr *sec_addr; | |
349 | struct listnode *node; | |
350 | ||
351 | if (!pim_ifp->sec_addr_list) { | |
352 | return NULL; | |
353 | } | |
354 | ||
355 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->sec_addr_list, node, sec_addr)) { | |
356 | if (sec_addr->addr.s_addr == addr.s_addr) { | |
357 | return sec_addr; | |
358 | } | |
359 | } | |
360 | ||
361 | return NULL; | |
362 | } | |
363 | ||
364 | static void pim_sec_addr_del(struct pim_interface *pim_ifp, | |
365 | struct pim_secondary_addr *sec_addr) | |
366 | { | |
367 | listnode_delete(pim_ifp->sec_addr_list, sec_addr); | |
368 | pim_sec_addr_free(sec_addr); | |
369 | } | |
370 | ||
371 | static int pim_sec_addr_add(struct pim_interface *pim_ifp, struct in_addr addr) | |
372 | { | |
373 | int changed = 0; | |
374 | struct pim_secondary_addr *sec_addr; | |
375 | ||
376 | sec_addr = pim_sec_addr_find(pim_ifp, addr); | |
377 | if (sec_addr) { | |
378 | sec_addr->flags &= ~PIM_SEC_ADDRF_STALE; | |
379 | return changed; | |
380 | } | |
381 | ||
382 | if (!pim_ifp->sec_addr_list) { | |
383 | pim_ifp->sec_addr_list = list_new(); | |
384 | pim_ifp->sec_addr_list->del = (void (*)(void *))pim_sec_addr_free; | |
385 | pim_ifp->sec_addr_list->cmp = (int (*)(void *, void *))pim_sec_addr_comp; | |
386 | } | |
387 | ||
388 | sec_addr = XCALLOC(MTYPE_PIM_SEC_ADDR, sizeof(*sec_addr)); | |
389 | if (!sec_addr) { | |
390 | if (list_isempty(pim_ifp->sec_addr_list)) { | |
391 | list_free(pim_ifp->sec_addr_list); | |
392 | pim_ifp->sec_addr_list = NULL; | |
393 | } | |
394 | return changed; | |
395 | } | |
396 | ||
397 | changed = 1; | |
398 | sec_addr->addr = addr; | |
399 | listnode_add_sort(pim_ifp->sec_addr_list, sec_addr); | |
400 | ||
401 | return changed; | |
402 | } | |
403 | ||
404 | static int pim_sec_addr_del_all(struct pim_interface *pim_ifp) | |
405 | { | |
406 | int changed = 0; | |
407 | ||
408 | if (!pim_ifp->sec_addr_list) { | |
409 | return changed; | |
410 | } | |
411 | if (!list_isempty(pim_ifp->sec_addr_list)) { | |
412 | changed = 1; | |
413 | /* remove all nodes and free up the list itself */ | |
414 | list_delete_all_node(pim_ifp->sec_addr_list); | |
415 | list_free(pim_ifp->sec_addr_list); | |
416 | pim_ifp->sec_addr_list = NULL; | |
417 | } | |
418 | ||
419 | return changed; | |
420 | } | |
421 | ||
422 | static int pim_sec_addr_update(struct interface *ifp) | |
423 | { | |
424 | struct pim_interface *pim_ifp = ifp->info; | |
425 | struct connected *ifc; | |
426 | struct listnode *node; | |
427 | struct listnode *nextnode; | |
428 | struct pim_secondary_addr *sec_addr; | |
429 | int changed = 0; | |
430 | ||
431 | if (pim_ifp->sec_addr_list) { | |
432 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->sec_addr_list, node, sec_addr)) { | |
433 | sec_addr->flags |= PIM_SEC_ADDRF_STALE; | |
434 | } | |
435 | } | |
436 | ||
437 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) { | |
438 | struct prefix *p = ifc->address; | |
439 | ||
440 | if (p->family != AF_INET) { | |
441 | continue; | |
442 | } | |
443 | ||
444 | if (PIM_INADDR_IS_ANY(p->u.prefix4)) { | |
445 | continue; | |
446 | } | |
447 | ||
448 | if (pim_ifp->primary_address.s_addr == p->u.prefix4.s_addr) { | |
449 | /* don't add the primary address into the secondary address list */ | |
450 | continue; | |
451 | } | |
452 | ||
453 | if (pim_sec_addr_add(pim_ifp, p->u.prefix4)) { | |
454 | changed = 1; | |
455 | } | |
456 | } | |
457 | ||
458 | if (pim_ifp->sec_addr_list) { | |
459 | /* Drop stale entries */ | |
460 | for (ALL_LIST_ELEMENTS(pim_ifp->sec_addr_list, node, nextnode, sec_addr)) { | |
461 | if (sec_addr->flags & PIM_SEC_ADDRF_STALE) { | |
462 | pim_sec_addr_del(pim_ifp, sec_addr); | |
463 | changed = 1; | |
464 | } | |
465 | } | |
466 | ||
467 | /* If the list went empty free it up */ | |
468 | if (list_isempty(pim_ifp->sec_addr_list)) { | |
469 | list_free(pim_ifp->sec_addr_list); | |
470 | pim_ifp->sec_addr_list = NULL; | |
471 | } | |
472 | } | |
473 | ||
474 | return changed; | |
475 | } | |
476 | ||
4763cd0e | 477 | static int detect_secondary_address_change(struct interface *ifp, |
7176984f | 478 | int force_prim_as_any, |
12e41d03 DL |
479 | const char *caller) |
480 | { | |
4763cd0e | 481 | struct pim_interface *pim_ifp = ifp->info; |
7176984f | 482 | int changed = 0; |
12e41d03 | 483 | |
7176984f | 484 | if (force_prim_as_any) { |
485 | /* if primary address is being forced to zero just flush the | |
486 | * secondary address list */ | |
4763cd0e | 487 | changed = pim_sec_addr_del_all(pim_ifp); |
7176984f | 488 | } else { |
489 | /* re-evaluate the secondary address list */ | |
490 | changed = pim_sec_addr_update(ifp); | |
491 | } | |
492 | ||
4763cd0e | 493 | return changed; |
494 | } | |
495 | ||
496 | static void detect_address_change(struct interface *ifp, | |
497 | int force_prim_as_any, | |
498 | const char *caller) | |
499 | { | |
500 | int changed = 0; | |
501 | struct pim_interface *pim_ifp; | |
12e41d03 | 502 | |
4763cd0e | 503 | pim_ifp = ifp->info; |
504 | if (!pim_ifp) | |
12e41d03 | 505 | return; |
4763cd0e | 506 | |
507 | if (detect_primary_address_change(ifp, force_prim_as_any, caller)) { | |
508 | changed = 1; | |
12e41d03 DL |
509 | } |
510 | ||
4763cd0e | 511 | if (detect_secondary_address_change(ifp, force_prim_as_any, caller)) { |
512 | changed = 1; | |
513 | } | |
514 | ||
515 | ||
516 | if (changed) { | |
517 | if (!PIM_IF_TEST_PIM(pim_ifp->options)) { | |
518 | return; | |
519 | } | |
520 | ||
521 | pim_addr_change(ifp); | |
12e41d03 DL |
522 | } |
523 | ||
4763cd0e | 524 | /* XXX: if we have unnumbered interfaces we need to run detect address |
525 | * address change on all of them when the lo address changes */ | |
12e41d03 DL |
526 | } |
527 | ||
4763cd0e | 528 | int pim_update_source_set(struct interface *ifp, struct in_addr source) |
12e41d03 | 529 | { |
4763cd0e | 530 | struct pim_interface *pim_ifp = ifp->info; |
12e41d03 | 531 | |
4763cd0e | 532 | if (!pim_ifp) { |
533 | return PIM_IFACE_NOT_FOUND; | |
12e41d03 DL |
534 | } |
535 | ||
4763cd0e | 536 | if (pim_ifp->update_source.s_addr == source.s_addr) { |
537 | return PIM_UPDATE_SOURCE_DUP; | |
538 | } | |
539 | ||
540 | pim_ifp->update_source = source; | |
541 | detect_address_change(ifp, 0 /* force_prim_as_any */, | |
542 | __PRETTY_FUNCTION__); | |
543 | ||
544 | return PIM_SUCCESS; | |
12e41d03 DL |
545 | } |
546 | ||
547 | void pim_if_addr_add(struct connected *ifc) | |
548 | { | |
549 | struct pim_interface *pim_ifp; | |
550 | struct interface *ifp; | |
551 | struct in_addr ifaddr; | |
552 | ||
553 | zassert(ifc); | |
554 | ||
555 | ifp = ifc->ifp; | |
556 | zassert(ifp); | |
557 | pim_ifp = ifp->info; | |
558 | if (!pim_ifp) | |
559 | return; | |
560 | ||
561 | if (!if_is_operative(ifp)) | |
562 | return; | |
563 | ||
7adf0260 | 564 | if (PIM_DEBUG_ZEBRA) { |
12e41d03 DL |
565 | char buf[BUFSIZ]; |
566 | prefix2str(ifc->address, buf, BUFSIZ); | |
567 | zlog_debug("%s: %s ifindex=%d connected IP address %s %s", | |
568 | __PRETTY_FUNCTION__, | |
569 | ifp->name, ifp->ifindex, buf, | |
570 | CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY) ? | |
571 | "secondary" : "primary"); | |
572 | } | |
573 | ||
574 | ifaddr = ifc->address->u.prefix4; | |
575 | ||
576 | detect_address_change(ifp, 0, __PRETTY_FUNCTION__); | |
577 | ||
578 | if (PIM_IF_TEST_IGMP(pim_ifp->options)) { | |
579 | struct igmp_sock *igmp; | |
580 | ||
581 | /* lookup IGMP socket */ | |
582 | igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->igmp_socket_list, | |
583 | ifaddr); | |
584 | if (!igmp) { | |
585 | /* if addr new, add IGMP socket */ | |
586 | pim_igmp_sock_add(pim_ifp->igmp_socket_list, ifaddr, ifp); | |
587 | } | |
588 | } /* igmp */ | |
589 | ||
590 | if (PIM_IF_TEST_PIM(pim_ifp->options)) { | |
591 | ||
592 | /* Interface has a valid primary address ? */ | |
593 | if (PIM_INADDR_ISNOT_ANY(pim_ifp->primary_address)) { | |
594 | ||
595 | /* Interface has a valid socket ? */ | |
596 | if (pim_ifp->pim_sock_fd < 0) { | |
597 | if (pim_sock_add(ifp)) { | |
598 | zlog_warn("Failure creating PIM socket for interface %s", | |
599 | ifp->name); | |
600 | } | |
601 | } | |
602 | ||
603 | } | |
604 | } /* pim */ | |
605 | ||
606 | if (PIM_MROUTE_IS_ENABLED) { | |
607 | /* | |
608 | PIM or IGMP is enabled on interface, and there is at least one | |
609 | address assigned, then try to create a vif_index. | |
610 | */ | |
611 | if (pim_ifp->mroute_vif_index < 0) { | |
612 | pim_if_add_vif(ifp); | |
613 | } | |
c8507a16 | 614 | pim_ifchannel_scan_forward_start (ifp); |
12e41d03 DL |
615 | } |
616 | } | |
617 | ||
618 | static void pim_if_addr_del_igmp(struct connected *ifc) | |
619 | { | |
620 | struct pim_interface *pim_ifp = ifc->ifp->info; | |
621 | struct igmp_sock *igmp; | |
622 | struct in_addr ifaddr; | |
623 | ||
624 | if (ifc->address->family != AF_INET) { | |
625 | /* non-IPv4 address */ | |
626 | return; | |
627 | } | |
628 | ||
629 | if (!pim_ifp) { | |
630 | /* IGMP not enabled on interface */ | |
631 | return; | |
632 | } | |
633 | ||
634 | ifaddr = ifc->address->u.prefix4; | |
635 | ||
636 | /* lookup IGMP socket */ | |
637 | igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->igmp_socket_list, | |
638 | ifaddr); | |
639 | if (igmp) { | |
640 | /* if addr found, del IGMP socket */ | |
641 | igmp_sock_delete(igmp); | |
642 | } | |
643 | } | |
644 | ||
645 | static void pim_if_addr_del_pim(struct connected *ifc) | |
646 | { | |
647 | struct pim_interface *pim_ifp = ifc->ifp->info; | |
648 | ||
649 | if (ifc->address->family != AF_INET) { | |
650 | /* non-IPv4 address */ | |
651 | return; | |
652 | } | |
653 | ||
654 | if (!pim_ifp) { | |
655 | /* PIM not enabled on interface */ | |
656 | return; | |
657 | } | |
658 | ||
659 | if (PIM_INADDR_ISNOT_ANY(pim_ifp->primary_address)) { | |
660 | /* Interface keeps a valid primary address */ | |
661 | return; | |
662 | } | |
663 | ||
664 | if (pim_ifp->pim_sock_fd < 0) { | |
665 | /* Interface does not hold a valid socket any longer */ | |
666 | return; | |
667 | } | |
668 | ||
669 | /* | |
670 | pim_sock_delete() closes the socket, stops read and timer threads, | |
671 | and kills all neighbors. | |
672 | */ | |
673 | pim_sock_delete(ifc->ifp, "last address has been removed from interface"); | |
674 | } | |
675 | ||
676 | void pim_if_addr_del(struct connected *ifc, int force_prim_as_any) | |
677 | { | |
678 | struct interface *ifp; | |
679 | ||
680 | zassert(ifc); | |
681 | ifp = ifc->ifp; | |
682 | zassert(ifp); | |
683 | ||
7adf0260 | 684 | if (PIM_DEBUG_ZEBRA) { |
12e41d03 DL |
685 | char buf[BUFSIZ]; |
686 | prefix2str(ifc->address, buf, BUFSIZ); | |
687 | zlog_debug("%s: %s ifindex=%d disconnected IP address %s %s", | |
688 | __PRETTY_FUNCTION__, | |
689 | ifp->name, ifp->ifindex, buf, | |
690 | CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY) ? | |
691 | "secondary" : "primary"); | |
692 | } | |
693 | ||
694 | detect_address_change(ifp, force_prim_as_any, __PRETTY_FUNCTION__); | |
695 | ||
696 | pim_if_addr_del_igmp(ifc); | |
697 | pim_if_addr_del_pim(ifc); | |
698 | } | |
699 | ||
700 | void pim_if_addr_add_all(struct interface *ifp) | |
701 | { | |
702 | struct connected *ifc; | |
703 | struct listnode *node; | |
704 | struct listnode *nextnode; | |
d8424057 DS |
705 | int v4_addrs = 0; |
706 | int v6_addrs = 0; | |
7176984f | 707 | struct pim_interface *pim_ifp = ifp->info; |
708 | ||
12e41d03 DL |
709 | |
710 | /* PIM/IGMP enabled ? */ | |
7176984f | 711 | if (!pim_ifp) |
12e41d03 DL |
712 | return; |
713 | ||
714 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) { | |
715 | struct prefix *p = ifc->address; | |
716 | ||
717 | if (p->family != AF_INET) | |
d8424057 DS |
718 | { |
719 | v6_addrs++; | |
720 | continue; | |
721 | } | |
12e41d03 | 722 | |
d8424057 | 723 | v4_addrs++; |
12e41d03 DL |
724 | pim_if_addr_add(ifc); |
725 | } | |
d8424057 DS |
726 | |
727 | if (!v4_addrs && v6_addrs && !if_is_loopback (ifp)) | |
728 | { | |
7176984f | 729 | if (PIM_IF_TEST_PIM(pim_ifp->options)) { |
d8424057 DS |
730 | |
731 | /* Interface has a valid primary address ? */ | |
732 | if (PIM_INADDR_ISNOT_ANY(pim_ifp->primary_address)) { | |
733 | ||
734 | /* Interface has a valid socket ? */ | |
735 | if (pim_ifp->pim_sock_fd < 0) { | |
736 | if (pim_sock_add(ifp)) { | |
737 | zlog_warn("Failure creating PIM socket for interface %s", | |
738 | ifp->name); | |
739 | } | |
740 | } | |
741 | ||
742 | } | |
743 | } /* pim */ | |
744 | } | |
ef71d1f8 DS |
745 | if (PIM_MROUTE_IS_ENABLED) { |
746 | /* | |
747 | * PIM or IGMP is enabled on interface, and there is at least one | |
748 | * address assigned, then try to create a vif_index. | |
749 | */ | |
750 | if (pim_ifp->mroute_vif_index < 0) { | |
751 | pim_if_add_vif(ifp); | |
752 | } | |
753 | pim_ifchannel_scan_forward_start (ifp); | |
754 | } | |
755 | ||
da3dcffb | 756 | pim_rp_setup(); |
7176984f | 757 | pim_rp_check_on_if_add(pim_ifp); |
12e41d03 DL |
758 | } |
759 | ||
760 | void pim_if_addr_del_all(struct interface *ifp) | |
761 | { | |
762 | struct connected *ifc; | |
763 | struct listnode *node; | |
764 | struct listnode *nextnode; | |
765 | ||
766 | /* PIM/IGMP enabled ? */ | |
767 | if (!ifp->info) | |
768 | return; | |
769 | ||
770 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) { | |
771 | struct prefix *p = ifc->address; | |
772 | ||
773 | if (p->family != AF_INET) | |
774 | continue; | |
775 | ||
776 | pim_if_addr_del(ifc, 1 /* force_prim_as_any=true */); | |
777 | } | |
da3dcffb DS |
778 | |
779 | pim_rp_setup(); | |
7176984f | 780 | pim_i_am_rp_re_evaluate(); |
12e41d03 DL |
781 | } |
782 | ||
783 | void pim_if_addr_del_all_igmp(struct interface *ifp) | |
784 | { | |
785 | struct connected *ifc; | |
786 | struct listnode *node; | |
787 | struct listnode *nextnode; | |
788 | ||
789 | /* PIM/IGMP enabled ? */ | |
790 | if (!ifp->info) | |
791 | return; | |
792 | ||
793 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) { | |
794 | struct prefix *p = ifc->address; | |
795 | ||
796 | if (p->family != AF_INET) | |
797 | continue; | |
798 | ||
799 | pim_if_addr_del_igmp(ifc); | |
800 | } | |
801 | } | |
802 | ||
803 | void pim_if_addr_del_all_pim(struct interface *ifp) | |
804 | { | |
805 | struct connected *ifc; | |
806 | struct listnode *node; | |
807 | struct listnode *nextnode; | |
808 | ||
809 | /* PIM/IGMP enabled ? */ | |
810 | if (!ifp->info) | |
811 | return; | |
812 | ||
813 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nextnode, ifc)) { | |
814 | struct prefix *p = ifc->address; | |
815 | ||
816 | if (p->family != AF_INET) | |
817 | continue; | |
818 | ||
819 | pim_if_addr_del_pim(ifc); | |
820 | } | |
821 | } | |
822 | ||
89f1d91e DS |
823 | struct in_addr |
824 | pim_find_primary_addr (struct interface *ifp) | |
12e41d03 DL |
825 | { |
826 | struct connected *ifc; | |
827 | struct listnode *node; | |
828 | struct in_addr addr; | |
d8424057 DS |
829 | int v4_addrs = 0; |
830 | int v6_addrs = 0; | |
4763cd0e | 831 | struct pim_interface *pim_ifp = ifp->info; |
832 | ||
833 | if (pim_ifp && PIM_INADDR_ISNOT_ANY(pim_ifp->update_source)) { | |
834 | return pim_ifp->update_source; | |
835 | } | |
12e41d03 DL |
836 | |
837 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) { | |
838 | struct prefix *p = ifc->address; | |
d8424057 | 839 | |
12e41d03 | 840 | if (p->family != AF_INET) |
d8424057 DS |
841 | { |
842 | v6_addrs++; | |
843 | continue; | |
844 | } | |
12e41d03 DL |
845 | |
846 | if (PIM_INADDR_IS_ANY(p->u.prefix4)) { | |
847 | zlog_warn("%s: null IPv4 address connected to interface %s", | |
848 | __PRETTY_FUNCTION__, ifp->name); | |
849 | continue; | |
850 | } | |
851 | ||
d8424057 DS |
852 | v4_addrs++; |
853 | ||
12e41d03 DL |
854 | if (CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY)) |
855 | continue; | |
856 | ||
857 | return p->u.prefix4; | |
858 | } | |
859 | ||
d8424057 DS |
860 | /* |
861 | * If we have no v4_addrs and v6 is configured | |
862 | * We probably are using unnumbered | |
863 | * So let's grab the loopbacks v4 address | |
864 | * and use that as the primary address | |
865 | */ | |
866 | if (!v4_addrs && v6_addrs && !if_is_loopback (ifp)) | |
867 | { | |
868 | struct interface *lo_ifp; | |
869 | lo_ifp = if_lookup_by_name_vrf ("lo", VRF_DEFAULT); | |
870 | if (lo_ifp) | |
871 | return pim_find_primary_addr (lo_ifp); | |
872 | } | |
873 | ||
12e41d03 DL |
874 | addr.s_addr = PIM_NET_INADDR_ANY; |
875 | ||
876 | return addr; | |
877 | } | |
878 | ||
9df99407 | 879 | static int |
744d91b3 DS |
880 | pim_iface_next_vif_index (struct interface *ifp) |
881 | { | |
dc0665f1 | 882 | int i; |
744d91b3 DS |
883 | /* |
884 | * The pimreg vif is always going to be in index 0 | |
885 | * of the table. | |
886 | */ | |
887 | if (ifp->ifindex == PIM_OIF_PIM_REGISTER_VIF) | |
888 | return 0; | |
889 | ||
dc0665f1 DS |
890 | for (i = 1 ; i < MAXVIFS; i++) |
891 | { | |
892 | if (pim_iface_vif_index[i] == 0) | |
893 | return i; | |
894 | } | |
895 | return MAXVIFS; | |
744d91b3 DS |
896 | } |
897 | ||
12e41d03 DL |
898 | /* |
899 | pim_if_add_vif() uses ifindex as vif_index | |
900 | ||
901 | see also pim_if_find_vifindex_by_ifindex() | |
902 | */ | |
903 | int pim_if_add_vif(struct interface *ifp) | |
904 | { | |
905 | struct pim_interface *pim_ifp = ifp->info; | |
906 | struct in_addr ifaddr; | |
b3f2bf7c | 907 | unsigned char flags = 0; |
12e41d03 DL |
908 | |
909 | zassert(pim_ifp); | |
910 | ||
911 | if (pim_ifp->mroute_vif_index > 0) { | |
912 | zlog_warn("%s: vif_index=%d > 0 on interface %s ifindex=%d", | |
913 | __PRETTY_FUNCTION__, | |
914 | pim_ifp->mroute_vif_index, ifp->name, ifp->ifindex); | |
915 | return -1; | |
916 | } | |
917 | ||
e34a317a | 918 | if (ifp->ifindex < 0) { |
12e41d03 DL |
919 | zlog_warn("%s: ifindex=%d < 1 on interface %s", |
920 | __PRETTY_FUNCTION__, | |
921 | ifp->ifindex, ifp->name); | |
922 | return -2; | |
923 | } | |
924 | ||
12e41d03 | 925 | ifaddr = pim_ifp->primary_address; |
c992c9a0 | 926 | if (ifp->ifindex != PIM_OIF_PIM_REGISTER_VIF && PIM_INADDR_IS_ANY(ifaddr)) { |
12e41d03 DL |
927 | zlog_warn("%s: could not get address for interface %s ifindex=%d", |
928 | __PRETTY_FUNCTION__, | |
929 | ifp->name, ifp->ifindex); | |
930 | return -4; | |
931 | } | |
932 | ||
744d91b3 DS |
933 | pim_ifp->mroute_vif_index = pim_iface_next_vif_index (ifp); |
934 | ||
935 | if (pim_ifp->mroute_vif_index >= MAXVIFS) | |
936 | { | |
937 | zlog_warn("%s: Attempting to configure more than MAXVIFS=%d on pim enabled interface %s", | |
938 | __PRETTY_FUNCTION__, | |
939 | MAXVIFS, ifp->name); | |
940 | return -3; | |
941 | } | |
942 | ||
b3f2bf7c RW |
943 | if (ifp->ifindex == PIM_OIF_PIM_REGISTER_VIF) |
944 | flags = VIFF_REGISTER; | |
945 | #ifdef VIFF_USE_IFINDEX | |
946 | else | |
947 | flags = VIFF_USE_IFINDEX; | |
948 | #endif | |
949 | ||
744d91b3 | 950 | if (pim_mroute_add_vif(ifp, ifaddr, flags)) { |
12e41d03 DL |
951 | /* pim_mroute_add_vif reported error */ |
952 | return -5; | |
953 | } | |
954 | ||
dc0665f1 | 955 | pim_iface_vif_index[pim_ifp->mroute_vif_index] = 1; |
12e41d03 DL |
956 | return 0; |
957 | } | |
958 | ||
12e41d03 DL |
959 | int pim_if_del_vif(struct interface *ifp) |
960 | { | |
961 | struct pim_interface *pim_ifp = ifp->info; | |
12e41d03 DL |
962 | |
963 | if (pim_ifp->mroute_vif_index < 1) { | |
964 | zlog_warn("%s: vif_index=%d < 1 on interface %s ifindex=%d", | |
965 | __PRETTY_FUNCTION__, | |
966 | pim_ifp->mroute_vif_index, ifp->name, ifp->ifindex); | |
967 | return -1; | |
968 | } | |
969 | ||
429a291b | 970 | pim_mroute_del_vif(pim_ifp->mroute_vif_index); |
12e41d03 DL |
971 | |
972 | /* | |
dc0665f1 | 973 | Update vif_index |
12e41d03 | 974 | */ |
dc0665f1 | 975 | pim_iface_vif_index[pim_ifp->mroute_vif_index] = 0; |
12e41d03 DL |
976 | |
977 | pim_ifp->mroute_vif_index = -1; | |
978 | ||
12e41d03 DL |
979 | return 0; |
980 | } | |
981 | ||
982 | void pim_if_add_vif_all() | |
983 | { | |
984 | struct listnode *ifnode; | |
985 | struct listnode *ifnextnode; | |
986 | struct interface *ifp; | |
987 | ||
469351b3 | 988 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
989 | if (!ifp->info) |
990 | continue; | |
991 | ||
992 | pim_if_add_vif(ifp); | |
993 | } | |
994 | } | |
995 | ||
996 | void pim_if_del_vif_all() | |
997 | { | |
998 | struct listnode *ifnode; | |
999 | struct listnode *ifnextnode; | |
1000 | struct interface *ifp; | |
1001 | ||
469351b3 | 1002 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
1003 | if (!ifp->info) |
1004 | continue; | |
1005 | ||
1006 | pim_if_del_vif(ifp); | |
1007 | } | |
1008 | } | |
1009 | ||
b892f1dd | 1010 | struct interface *pim_if_find_by_vif_index(ifindex_t vif_index) |
12e41d03 DL |
1011 | { |
1012 | struct listnode *ifnode; | |
1013 | struct interface *ifp; | |
1014 | ||
ae90dfbb DS |
1015 | if (vif_index == 0) |
1016 | return if_lookup_by_name_vrf ("pimreg", VRF_DEFAULT); | |
1017 | ||
469351b3 | 1018 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), ifnode, ifp)) { |
12e41d03 DL |
1019 | if (ifp->info) { |
1020 | struct pim_interface *pim_ifp; | |
1021 | pim_ifp = ifp->info; | |
b892f1dd | 1022 | |
12e41d03 DL |
1023 | if (vif_index == pim_ifp->mroute_vif_index) |
1024 | return ifp; | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | return 0; | |
1029 | } | |
1030 | ||
1031 | /* | |
1032 | pim_if_add_vif() uses ifindex as vif_index | |
1033 | */ | |
b892f1dd | 1034 | int pim_if_find_vifindex_by_ifindex(ifindex_t ifindex) |
12e41d03 | 1035 | { |
ae90dfbb DS |
1036 | struct pim_interface *pim_ifp; |
1037 | struct interface *ifp; | |
1038 | ||
1039 | ifp = if_lookup_by_index_vrf (ifindex, VRF_DEFAULT); | |
28185336 | 1040 | if (!ifp || !ifp->info) |
ae90dfbb | 1041 | return -1; |
28185336 | 1042 | pim_ifp = ifp->info; |
ae90dfbb DS |
1043 | |
1044 | return pim_ifp->mroute_vif_index; | |
12e41d03 DL |
1045 | } |
1046 | ||
1047 | int pim_if_lan_delay_enabled(struct interface *ifp) | |
1048 | { | |
1049 | struct pim_interface *pim_ifp; | |
1050 | ||
1051 | pim_ifp = ifp->info; | |
1052 | zassert(pim_ifp); | |
1053 | zassert(pim_ifp->pim_number_of_nonlandelay_neighbors >= 0); | |
1054 | ||
1055 | return pim_ifp->pim_number_of_nonlandelay_neighbors == 0; | |
1056 | } | |
1057 | ||
1058 | uint16_t pim_if_effective_propagation_delay_msec(struct interface *ifp) | |
1059 | { | |
1060 | if (pim_if_lan_delay_enabled(ifp)) { | |
1061 | struct pim_interface *pim_ifp; | |
1062 | pim_ifp = ifp->info; | |
1063 | return pim_ifp->pim_neighbors_highest_propagation_delay_msec; | |
1064 | } | |
1065 | else { | |
1066 | return PIM_DEFAULT_PROPAGATION_DELAY_MSEC; | |
1067 | } | |
1068 | } | |
1069 | ||
1070 | uint16_t pim_if_effective_override_interval_msec(struct interface *ifp) | |
1071 | { | |
1072 | if (pim_if_lan_delay_enabled(ifp)) { | |
1073 | struct pim_interface *pim_ifp; | |
1074 | pim_ifp = ifp->info; | |
1075 | return pim_ifp->pim_neighbors_highest_override_interval_msec; | |
1076 | } | |
1077 | else { | |
1078 | return PIM_DEFAULT_OVERRIDE_INTERVAL_MSEC; | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | int pim_if_t_override_msec(struct interface *ifp) | |
1083 | { | |
1084 | int effective_override_interval_msec; | |
1085 | int t_override_msec; | |
1086 | ||
1087 | effective_override_interval_msec = | |
1088 | pim_if_effective_override_interval_msec(ifp); | |
1089 | ||
60b40924 | 1090 | t_override_msec = random() % (effective_override_interval_msec + 1); |
12e41d03 DL |
1091 | |
1092 | return t_override_msec; | |
1093 | } | |
1094 | ||
1095 | uint16_t pim_if_jp_override_interval_msec(struct interface *ifp) | |
1096 | { | |
1097 | return pim_if_effective_propagation_delay_msec(ifp) + | |
1098 | pim_if_effective_override_interval_msec(ifp); | |
1099 | } | |
1100 | ||
1101 | /* | |
1102 | RFC 4601: 4.1.6. State Summarization Macros | |
1103 | ||
1104 | The function NBR( I, A ) uses information gathered through PIM Hello | |
1105 | messages to map the IP address A of a directly connected PIM | |
1106 | neighbor router on interface I to the primary IP address of the same | |
1107 | router (Section 4.3.4). The primary IP address of a neighbor is the | |
1108 | address that it uses as the source of its PIM Hello messages. | |
1109 | */ | |
1110 | struct pim_neighbor *pim_if_find_neighbor(struct interface *ifp, | |
1111 | struct in_addr addr) | |
1112 | { | |
1113 | struct listnode *neighnode; | |
1114 | struct pim_neighbor *neigh; | |
1115 | struct pim_interface *pim_ifp; | |
1116 | ||
1117 | zassert(ifp); | |
1118 | ||
1119 | pim_ifp = ifp->info; | |
1120 | if (!pim_ifp) { | |
1121 | zlog_warn("%s: multicast not enabled on interface %s", | |
1122 | __PRETTY_FUNCTION__, | |
1123 | ifp->name); | |
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->pim_neighbor_list, neighnode, neigh)) { | |
1128 | ||
1129 | /* primary address ? */ | |
1130 | if (neigh->source_addr.s_addr == addr.s_addr) | |
1131 | return neigh; | |
1132 | ||
1133 | /* secondary address ? */ | |
1134 | if (pim_neighbor_find_secondary(neigh, addr)) | |
1135 | return neigh; | |
1136 | } | |
1137 | ||
1138 | if (PIM_DEBUG_PIM_TRACE) { | |
eaa54bdb | 1139 | char addr_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
1140 | pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str)); |
1141 | zlog_debug("%s: neighbor not found for address %s on interface %s", | |
1142 | __PRETTY_FUNCTION__, | |
1143 | addr_str, ifp->name); | |
1144 | } | |
1145 | ||
ff67a923 | 1146 | return NULL; |
12e41d03 DL |
1147 | } |
1148 | ||
1149 | long pim_if_t_suppressed_msec(struct interface *ifp) | |
1150 | { | |
1151 | struct pim_interface *pim_ifp; | |
1152 | long t_suppressed_msec; | |
60b40924 | 1153 | uint32_t ramount = 0; |
12e41d03 DL |
1154 | |
1155 | pim_ifp = ifp->info; | |
1156 | zassert(pim_ifp); | |
1157 | ||
1158 | /* join suppression disabled ? */ | |
1159 | if (PIM_IF_TEST_PIM_CAN_DISABLE_JOIN_SUPRESSION(pim_ifp->options)) | |
1160 | return 0; | |
1161 | ||
1162 | /* t_suppressed = t_periodic * rand(1.1, 1.4) */ | |
60b40924 DS |
1163 | ramount = 1100 + (random() % (1400 - 1100 + 1)); |
1164 | t_suppressed_msec = qpim_t_periodic * ramount; | |
12e41d03 DL |
1165 | |
1166 | return t_suppressed_msec; | |
1167 | } | |
1168 | ||
1169 | static void igmp_join_free(struct igmp_join *ij) | |
1170 | { | |
1171 | XFREE(MTYPE_PIM_IGMP_JOIN, ij); | |
1172 | } | |
1173 | ||
1174 | static struct igmp_join *igmp_join_find(struct list *join_list, | |
1175 | struct in_addr group_addr, | |
1176 | struct in_addr source_addr) | |
1177 | { | |
1178 | struct listnode *node; | |
1179 | struct igmp_join *ij; | |
1180 | ||
1181 | zassert(join_list); | |
1182 | ||
1183 | for (ALL_LIST_ELEMENTS_RO(join_list, node, ij)) { | |
1184 | if ((group_addr.s_addr == ij->group_addr.s_addr) && | |
1185 | (source_addr.s_addr == ij->source_addr.s_addr)) | |
1186 | return ij; | |
1187 | } | |
1188 | ||
1189 | return 0; | |
1190 | } | |
1191 | ||
1192 | static int igmp_join_sock(const char *ifname, | |
b892f1dd | 1193 | ifindex_t ifindex, |
12e41d03 DL |
1194 | struct in_addr group_addr, |
1195 | struct in_addr source_addr) | |
1196 | { | |
1197 | int join_fd; | |
1198 | ||
1199 | join_fd = pim_socket_raw(IPPROTO_IGMP); | |
1200 | if (join_fd < 0) { | |
1201 | return -1; | |
1202 | } | |
1203 | ||
1204 | if (pim_socket_join_source(join_fd, ifindex, group_addr, source_addr, ifname)) { | |
1205 | close(join_fd); | |
1206 | return -2; | |
1207 | } | |
1208 | ||
1209 | return join_fd; | |
1210 | } | |
1211 | ||
1212 | static struct igmp_join *igmp_join_new(struct interface *ifp, | |
1213 | struct in_addr group_addr, | |
1214 | struct in_addr source_addr) | |
1215 | { | |
1216 | struct pim_interface *pim_ifp; | |
1217 | struct igmp_join *ij; | |
1218 | int join_fd; | |
1219 | ||
1220 | pim_ifp = ifp->info; | |
1221 | zassert(pim_ifp); | |
1222 | ||
1223 | join_fd = igmp_join_sock(ifp->name, ifp->ifindex, group_addr, source_addr); | |
1224 | if (join_fd < 0) { | |
eaa54bdb DW |
1225 | char group_str[INET_ADDRSTRLEN]; |
1226 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1227 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1228 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1229 | zlog_warn("%s: igmp_join_sock() failure for IGMP group %s source %s on interface %s", | |
1230 | __PRETTY_FUNCTION__, | |
1231 | group_str, source_str, ifp->name); | |
1232 | return 0; | |
1233 | } | |
1234 | ||
36d9e7dc | 1235 | ij = XCALLOC(MTYPE_PIM_IGMP_JOIN, sizeof(*ij)); |
12e41d03 | 1236 | if (!ij) { |
eaa54bdb DW |
1237 | char group_str[INET_ADDRSTRLEN]; |
1238 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1239 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1240 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
36d9e7dc | 1241 | zlog_err("%s: XCALLOC(%zu) failure for IGMP group %s source %s on interface %s", |
12e41d03 DL |
1242 | __PRETTY_FUNCTION__, |
1243 | sizeof(*ij), group_str, source_str, ifp->name); | |
1244 | close(join_fd); | |
1245 | return 0; | |
1246 | } | |
1247 | ||
1248 | ij->sock_fd = join_fd; | |
1249 | ij->group_addr = group_addr; | |
1250 | ij->source_addr = source_addr; | |
1251 | ij->sock_creation = pim_time_monotonic_sec(); | |
1252 | ||
1253 | listnode_add(pim_ifp->igmp_join_list, ij); | |
1254 | ||
1255 | return ij; | |
1256 | } | |
1257 | ||
1258 | int pim_if_igmp_join_add(struct interface *ifp, | |
1259 | struct in_addr group_addr, | |
1260 | struct in_addr source_addr) | |
1261 | { | |
1262 | struct pim_interface *pim_ifp; | |
1263 | struct igmp_join *ij; | |
1264 | ||
1265 | pim_ifp = ifp->info; | |
1266 | if (!pim_ifp) { | |
1267 | zlog_warn("%s: multicast not enabled on interface %s", | |
1268 | __PRETTY_FUNCTION__, | |
1269 | ifp->name); | |
1270 | return -1; | |
1271 | } | |
1272 | ||
1273 | if (!pim_ifp->igmp_join_list) { | |
1274 | pim_ifp->igmp_join_list = list_new(); | |
1275 | if (!pim_ifp->igmp_join_list) { | |
1276 | zlog_err("%s %s: failure: igmp_join_list=list_new()", | |
1277 | __FILE__, __PRETTY_FUNCTION__); | |
1278 | return -2; | |
1279 | } | |
1280 | pim_ifp->igmp_join_list->del = (void (*)(void *)) igmp_join_free; | |
1281 | } | |
1282 | ||
1283 | ij = igmp_join_find(pim_ifp->igmp_join_list, group_addr, source_addr); | |
1284 | if (ij) { | |
eaa54bdb DW |
1285 | char group_str[INET_ADDRSTRLEN]; |
1286 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1287 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1288 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1289 | zlog_warn("%s: can't re-join existing IGMP group %s source %s on interface %s", | |
1290 | __PRETTY_FUNCTION__, | |
1291 | group_str, source_str, ifp->name); | |
1292 | return -3; | |
1293 | } | |
1294 | ||
1295 | ij = igmp_join_new(ifp, group_addr, source_addr); | |
1296 | if (!ij) { | |
eaa54bdb DW |
1297 | char group_str[INET_ADDRSTRLEN]; |
1298 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1299 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1300 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1301 | zlog_warn("%s: igmp_join_new() failure for IGMP group %s source %s on interface %s", | |
1302 | __PRETTY_FUNCTION__, | |
1303 | group_str, source_str, ifp->name); | |
1304 | return -4; | |
1305 | } | |
1306 | ||
7adf0260 | 1307 | if (PIM_DEBUG_IGMP_EVENTS) { |
eaa54bdb DW |
1308 | char group_str[INET_ADDRSTRLEN]; |
1309 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1310 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1311 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1312 | zlog_debug("%s: issued static igmp join for channel (S,G)=(%s,%s) on interface %s", | |
7adf0260 DS |
1313 | __PRETTY_FUNCTION__, |
1314 | source_str, group_str, ifp->name); | |
12e41d03 DL |
1315 | } |
1316 | ||
1317 | return 0; | |
1318 | } | |
1319 | ||
1320 | ||
1321 | ||
1322 | int pim_if_igmp_join_del(struct interface *ifp, | |
1323 | struct in_addr group_addr, | |
1324 | struct in_addr source_addr) | |
1325 | { | |
1326 | struct pim_interface *pim_ifp; | |
1327 | struct igmp_join *ij; | |
1328 | ||
1329 | pim_ifp = ifp->info; | |
1330 | if (!pim_ifp) { | |
1331 | zlog_warn("%s: multicast not enabled on interface %s", | |
1332 | __PRETTY_FUNCTION__, | |
1333 | ifp->name); | |
1334 | return -1; | |
1335 | } | |
1336 | ||
1337 | if (!pim_ifp->igmp_join_list) { | |
1338 | zlog_warn("%s: no IGMP join on interface %s", | |
1339 | __PRETTY_FUNCTION__, | |
1340 | ifp->name); | |
1341 | return -2; | |
1342 | } | |
1343 | ||
1344 | ij = igmp_join_find(pim_ifp->igmp_join_list, group_addr, source_addr); | |
1345 | if (!ij) { | |
eaa54bdb DW |
1346 | char group_str[INET_ADDRSTRLEN]; |
1347 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1348 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1349 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1350 | zlog_warn("%s: could not find IGMP group %s source %s on interface %s", | |
1351 | __PRETTY_FUNCTION__, | |
1352 | group_str, source_str, ifp->name); | |
1353 | return -3; | |
1354 | } | |
1355 | ||
1356 | if (close(ij->sock_fd)) { | |
eaa54bdb DW |
1357 | char group_str[INET_ADDRSTRLEN]; |
1358 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
1359 | pim_inet4_dump("<grp?>", group_addr, group_str, sizeof(group_str)); |
1360 | pim_inet4_dump("<src?>", source_addr, source_str, sizeof(source_str)); | |
1361 | zlog_warn("%s: failure closing sock_fd=%d for IGMP group %s source %s on interface %s: errno=%d: %s", | |
1362 | __PRETTY_FUNCTION__, | |
3d7765d7 | 1363 | ij->sock_fd, group_str, source_str, ifp->name, errno, safe_strerror(errno)); |
12e41d03 DL |
1364 | /* warning only */ |
1365 | } | |
1366 | listnode_delete(pim_ifp->igmp_join_list, ij); | |
1367 | igmp_join_free(ij); | |
1368 | if (listcount(pim_ifp->igmp_join_list) < 1) { | |
1369 | list_delete(pim_ifp->igmp_join_list); | |
1370 | pim_ifp->igmp_join_list = 0; | |
1371 | } | |
1372 | ||
1373 | return 0; | |
1374 | } | |
1375 | ||
1376 | static void pim_if_igmp_join_del_all(struct interface *ifp) | |
1377 | { | |
1378 | struct pim_interface *pim_ifp; | |
1379 | struct listnode *node; | |
1380 | struct listnode *nextnode; | |
1381 | struct igmp_join *ij; | |
1382 | ||
1383 | pim_ifp = ifp->info; | |
1384 | if (!pim_ifp) { | |
1385 | zlog_warn("%s: multicast not enabled on interface %s", | |
1386 | __PRETTY_FUNCTION__, | |
1387 | ifp->name); | |
1388 | return; | |
1389 | } | |
1390 | ||
1391 | if (!pim_ifp->igmp_join_list) | |
1392 | return; | |
1393 | ||
1394 | for (ALL_LIST_ELEMENTS(pim_ifp->igmp_join_list, node, nextnode, ij)) | |
1395 | pim_if_igmp_join_del(ifp, ij->group_addr, ij->source_addr); | |
1396 | } | |
1397 | ||
1398 | /* | |
1399 | RFC 4601 | |
1400 | ||
1401 | Transitions from "I am Assert Loser" State | |
1402 | ||
1403 | Current Winner's GenID Changes or NLT Expires | |
1404 | ||
1405 | The Neighbor Liveness Timer associated with the current winner | |
1406 | expires or we receive a Hello message from the current winner | |
1407 | reporting a different GenID from the one it previously reported. | |
1408 | This indicates that the current winner's interface or router has | |
1409 | gone down (and may have come back up), and so we must assume it no | |
1410 | longer knows it was the winner. | |
1411 | */ | |
1412 | void pim_if_assert_on_neighbor_down(struct interface *ifp, | |
1413 | struct in_addr neigh_addr) | |
1414 | { | |
1415 | struct pim_interface *pim_ifp; | |
1416 | struct listnode *node; | |
1417 | struct listnode *next_node; | |
1418 | struct pim_ifchannel *ch; | |
1419 | ||
1420 | pim_ifp = ifp->info; | |
1421 | zassert(pim_ifp); | |
1422 | ||
1423 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, node, next_node, ch)) { | |
1424 | /* Is (S,G,I) assert loser ? */ | |
1425 | if (ch->ifassert_state != PIM_IFASSERT_I_AM_LOSER) | |
1426 | continue; | |
1427 | /* Dead neighbor was winner ? */ | |
1428 | if (ch->ifassert_winner.s_addr != neigh_addr.s_addr) | |
1429 | continue; | |
1430 | ||
1431 | assert_action_a5(ch); | |
1432 | } | |
1433 | } | |
1434 | ||
1435 | void pim_if_update_join_desired(struct pim_interface *pim_ifp) | |
1436 | { | |
1437 | struct listnode *ch_node; | |
1438 | struct pim_ifchannel *ch; | |
1439 | ||
1440 | /* clear off flag from interface's upstreams */ | |
1441 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->pim_ifchannel_list, ch_node, ch)) { | |
1442 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED_UPDATED(ch->upstream->flags); | |
1443 | } | |
1444 | ||
1445 | /* scan per-interface (S,G,I) state on this I interface */ | |
1446 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->pim_ifchannel_list, ch_node, ch)) { | |
1447 | struct pim_upstream *up = ch->upstream; | |
1448 | ||
1449 | if (PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED_UPDATED(up->flags)) | |
1450 | continue; | |
1451 | ||
1452 | /* update join_desired for the global (S,G) state */ | |
1453 | pim_upstream_update_join_desired(up); | |
1454 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED_UPDATED(up->flags); | |
1455 | } | |
1456 | } | |
1457 | ||
1458 | void pim_if_update_assert_tracking_desired(struct interface *ifp) | |
1459 | { | |
1460 | struct pim_interface *pim_ifp; | |
1461 | struct listnode *node; | |
1462 | struct listnode *next_node; | |
1463 | struct pim_ifchannel *ch; | |
1464 | ||
1465 | pim_ifp = ifp->info; | |
1466 | if (!pim_ifp) | |
1467 | return; | |
1468 | ||
1469 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, node, next_node, ch)) { | |
1470 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1471 | } | |
1472 | } | |
c992c9a0 DS |
1473 | |
1474 | /* | |
1475 | * PIM wants to have an interface pointer for everything it does. | |
1476 | * The pimreg is a special interface that we have that is not | |
1477 | * quite an inteface but a VIF is created for it. | |
1478 | */ | |
1479 | void pim_if_create_pimreg (void) | |
1480 | { | |
1481 | if (!pim_regiface) { | |
1482 | pim_regiface = if_create("pimreg", strlen("pimreg")); | |
1483 | pim_regiface->ifindex = PIM_OIF_PIM_REGISTER_VIF; | |
1484 | ||
1485 | pim_if_new(pim_regiface, 0, 0); | |
1486 | } | |
1487 | } | |
3565202d DS |
1488 | |
1489 | int | |
1490 | pim_if_connected_to_source (struct interface *ifp, struct in_addr src) | |
1491 | { | |
1492 | struct listnode *cnode; | |
1493 | struct connected *c; | |
1494 | struct prefix p; | |
1495 | ||
1496 | p.family = AF_INET; | |
1497 | p.u.prefix4 = src; | |
1498 | p.prefixlen = IPV4_MAX_BITLEN; | |
1499 | ||
1500 | for (ALL_LIST_ELEMENTS_RO (ifp->connected, cnode, c)) | |
1501 | { | |
1502 | if ((c->address->family == AF_INET) && | |
1503 | prefix_match (CONNECTED_PREFIX (c), &p)) | |
1504 | { | |
1505 | return 1; | |
1506 | } | |
1507 | } | |
1508 | ||
1509 | return 0; | |
1510 | } | |
9f0edbc9 DS |
1511 | |
1512 | struct interface * | |
1513 | pim_if_lookup_address_vrf (struct in_addr src, vrf_id_t vrf_id) | |
1514 | { | |
1515 | struct listnode *ifnode; | |
1516 | struct interface *ifp; | |
1517 | ||
1518 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist(vrf_id), ifnode, ifp)) | |
1519 | { | |
1520 | if (pim_if_connected_to_source (ifp, src) && ifp->info) | |
1521 | return ifp; | |
1522 | } | |
1523 | return NULL; | |
1524 | } |