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1 | /* | |
2 | * PIM for Quagga | |
3 | * Copyright (C) 2008 Everton da Silva Marques | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; see the file COPYING; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
19 | ||
20 | #include <zebra.h> | |
21 | ||
22 | #include "log.h" | |
23 | #include "zclient.h" | |
24 | #include "memory.h" | |
25 | #include "thread.h" | |
26 | #include "linklist.h" | |
27 | #include "vty.h" | |
28 | #include "plist.h" | |
29 | #include "hash.h" | |
30 | #include "jhash.h" | |
31 | #include "wheel.h" | |
32 | ||
33 | #include "pimd.h" | |
34 | #include "pim_pim.h" | |
35 | #include "pim_str.h" | |
36 | #include "pim_time.h" | |
37 | #include "pim_iface.h" | |
38 | #include "pim_join.h" | |
39 | #include "pim_zlookup.h" | |
40 | #include "pim_upstream.h" | |
41 | #include "pim_ifchannel.h" | |
42 | #include "pim_neighbor.h" | |
43 | #include "pim_rpf.h" | |
44 | #include "pim_zebra.h" | |
45 | #include "pim_oil.h" | |
46 | #include "pim_macro.h" | |
47 | #include "pim_rp.h" | |
48 | #include "pim_br.h" | |
49 | #include "pim_register.h" | |
50 | #include "pim_msdp.h" | |
51 | #include "pim_jp_agg.h" | |
52 | #include "pim_nht.h" | |
53 | #include "pim_ssm.h" | |
54 | ||
55 | static void join_timer_stop(struct pim_upstream *up); | |
56 | static void | |
57 | pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); | |
58 | ||
59 | /* | |
60 | * A (*,G) or a (*,*) is going away | |
61 | * remove the parent pointer from | |
62 | * those pointing at us | |
63 | */ | |
64 | static void pim_upstream_remove_children(struct pim_instance *pim, | |
65 | struct pim_upstream *up) | |
66 | { | |
67 | struct pim_upstream *child; | |
68 | ||
69 | if (!up->sources) | |
70 | return; | |
71 | ||
72 | while (!list_isempty(up->sources)) { | |
73 | child = listnode_head(up->sources); | |
74 | listnode_delete(up->sources, child); | |
75 | if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(child->flags)) { | |
76 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(child->flags); | |
77 | child = pim_upstream_del(pim, child, | |
78 | __PRETTY_FUNCTION__); | |
79 | } | |
80 | if (child) | |
81 | child->parent = NULL; | |
82 | } | |
83 | list_delete(&up->sources); | |
84 | } | |
85 | ||
86 | /* | |
87 | * A (*,G) or a (*,*) is being created | |
88 | * Find the children that would point | |
89 | * at us. | |
90 | */ | |
91 | static void pim_upstream_find_new_children(struct pim_instance *pim, | |
92 | struct pim_upstream *up) | |
93 | { | |
94 | struct pim_upstream *child; | |
95 | struct listnode *ch_node; | |
96 | ||
97 | if ((up->sg.src.s_addr != INADDR_ANY) | |
98 | && (up->sg.grp.s_addr != INADDR_ANY)) | |
99 | return; | |
100 | ||
101 | if ((up->sg.src.s_addr == INADDR_ANY) | |
102 | && (up->sg.grp.s_addr == INADDR_ANY)) | |
103 | return; | |
104 | ||
105 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, ch_node, child)) { | |
106 | if ((up->sg.grp.s_addr != INADDR_ANY) | |
107 | && (child->sg.grp.s_addr == up->sg.grp.s_addr) | |
108 | && (child != up)) { | |
109 | child->parent = up; | |
110 | listnode_add_sort(up->sources, child); | |
111 | } | |
112 | } | |
113 | } | |
114 | ||
115 | /* | |
116 | * If we have a (*,*) || (S,*) there is no parent | |
117 | * If we have a (S,G), find the (*,G) | |
118 | * If we have a (*,G), find the (*,*) | |
119 | */ | |
120 | static struct pim_upstream *pim_upstream_find_parent(struct pim_instance *pim, | |
121 | struct pim_upstream *child) | |
122 | { | |
123 | struct prefix_sg any = child->sg; | |
124 | struct pim_upstream *up = NULL; | |
125 | ||
126 | // (S,G) | |
127 | if ((child->sg.src.s_addr != INADDR_ANY) | |
128 | && (child->sg.grp.s_addr != INADDR_ANY)) { | |
129 | any.src.s_addr = INADDR_ANY; | |
130 | up = pim_upstream_find(pim, &any); | |
131 | ||
132 | if (up) | |
133 | listnode_add(up->sources, child); | |
134 | ||
135 | return up; | |
136 | } | |
137 | ||
138 | return NULL; | |
139 | } | |
140 | ||
141 | static void upstream_channel_oil_detach(struct pim_upstream *up) | |
142 | { | |
143 | if (up->channel_oil) { | |
144 | /* Detaching from channel_oil, channel_oil may exist post del, | |
145 | but upstream would not keep reference of it | |
146 | */ | |
147 | up->channel_oil->up = NULL; | |
148 | pim_channel_oil_del(up->channel_oil); | |
149 | up->channel_oil = NULL; | |
150 | } | |
151 | } | |
152 | ||
153 | struct pim_upstream *pim_upstream_del(struct pim_instance *pim, | |
154 | struct pim_upstream *up, const char *name) | |
155 | { | |
156 | struct listnode *node, *nnode; | |
157 | struct pim_ifchannel *ch; | |
158 | bool notify_msdp = false; | |
159 | struct prefix nht_p; | |
160 | ||
161 | if (PIM_DEBUG_TRACE) | |
162 | zlog_debug( | |
163 | "%s(%s): Delete %s[%s] ref count: %d , flags: %d c_oil ref count %d (Pre decrement)", | |
164 | __PRETTY_FUNCTION__, name, up->sg_str, pim->vrf->name, | |
165 | up->ref_count, up->flags, | |
166 | up->channel_oil->oil_ref_count); | |
167 | ||
168 | assert(up->ref_count > 0); | |
169 | ||
170 | --up->ref_count; | |
171 | ||
172 | if (up->ref_count >= 1) | |
173 | return up; | |
174 | ||
175 | THREAD_OFF(up->t_ka_timer); | |
176 | THREAD_OFF(up->t_rs_timer); | |
177 | THREAD_OFF(up->t_msdp_reg_timer); | |
178 | ||
179 | if (up->join_state == PIM_UPSTREAM_JOINED) { | |
180 | pim_jp_agg_single_upstream_send(&up->rpf, up, 0); | |
181 | ||
182 | if (up->sg.src.s_addr == INADDR_ANY) { | |
183 | /* if a (*, G) entry in the joined state is being | |
184 | * deleted we | |
185 | * need to notify MSDP */ | |
186 | notify_msdp = true; | |
187 | } | |
188 | } | |
189 | ||
190 | join_timer_stop(up); | |
191 | pim_jp_agg_upstream_verification(up, false); | |
192 | up->rpf.source_nexthop.interface = NULL; | |
193 | ||
194 | if (up->sg.src.s_addr != INADDR_ANY) { | |
195 | if (pim->upstream_sg_wheel) | |
196 | wheel_remove_item(pim->upstream_sg_wheel, up); | |
197 | notify_msdp = true; | |
198 | } | |
199 | ||
200 | pim_mroute_del(up->channel_oil, __PRETTY_FUNCTION__); | |
201 | upstream_channel_oil_detach(up); | |
202 | ||
203 | for (ALL_LIST_ELEMENTS(up->ifchannels, node, nnode, ch)) | |
204 | pim_ifchannel_delete(ch); | |
205 | list_delete(&up->ifchannels); | |
206 | ||
207 | pim_upstream_remove_children(pim, up); | |
208 | if (up->sources) | |
209 | list_delete(&up->sources); | |
210 | ||
211 | if (up->parent && up->parent->sources) | |
212 | listnode_delete(up->parent->sources, up); | |
213 | up->parent = NULL; | |
214 | ||
215 | listnode_delete(pim->upstream_list, up); | |
216 | hash_release(pim->upstream_hash, up); | |
217 | ||
218 | if (notify_msdp) { | |
219 | pim_msdp_up_del(pim, &up->sg); | |
220 | } | |
221 | ||
222 | /* Deregister addr with Zebra NHT */ | |
223 | nht_p.family = AF_INET; | |
224 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
225 | nht_p.u.prefix4 = up->upstream_addr; | |
226 | if (PIM_DEBUG_TRACE) { | |
227 | char buf[PREFIX2STR_BUFFER]; | |
228 | prefix2str(&nht_p, buf, sizeof(buf)); | |
229 | zlog_debug("%s: Deregister upstream %s addr %s with Zebra NHT", | |
230 | __PRETTY_FUNCTION__, up->sg_str, buf); | |
231 | } | |
232 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL); | |
233 | ||
234 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
235 | ||
236 | return NULL; | |
237 | } | |
238 | ||
239 | void pim_upstream_send_join(struct pim_upstream *up) | |
240 | { | |
241 | if (PIM_DEBUG_TRACE) { | |
242 | char rpf_str[PREFIX_STRLEN]; | |
243 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, | |
244 | sizeof(rpf_str)); | |
245 | zlog_debug("%s: RPF'%s=%s(%s) for Interface %s", | |
246 | __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
247 | pim_upstream_state2str(up->join_state), | |
248 | up->rpf.source_nexthop.interface->name); | |
249 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
250 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", | |
251 | __PRETTY_FUNCTION__, up->sg_str, rpf_str); | |
252 | /* warning only */ | |
253 | } | |
254 | } | |
255 | ||
256 | /* send Join(S,G) to the current upstream neighbor */ | |
257 | pim_jp_agg_single_upstream_send(&up->rpf, up, 1 /* join */); | |
258 | } | |
259 | ||
260 | static int on_join_timer(struct thread *t) | |
261 | { | |
262 | struct pim_upstream *up; | |
263 | ||
264 | up = THREAD_ARG(t); | |
265 | ||
266 | /* | |
267 | * In the case of a HFR we will not ahve anyone to send this to. | |
268 | */ | |
269 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) | |
270 | return 0; | |
271 | ||
272 | /* | |
273 | * Don't send the join if the outgoing interface is a loopback | |
274 | * But since this might change leave the join timer running | |
275 | */ | |
276 | if (up->rpf.source_nexthop | |
277 | .interface && !if_is_loopback(up->rpf.source_nexthop.interface)) | |
278 | pim_upstream_send_join(up); | |
279 | ||
280 | join_timer_start(up); | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
285 | static void join_timer_stop(struct pim_upstream *up) | |
286 | { | |
287 | struct pim_neighbor *nbr; | |
288 | ||
289 | THREAD_OFF(up->t_join_timer); | |
290 | ||
291 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, | |
292 | up->rpf.rpf_addr.u.prefix4); | |
293 | ||
294 | if (nbr) | |
295 | pim_jp_agg_remove_group(nbr->upstream_jp_agg, up); | |
296 | ||
297 | pim_jp_agg_upstream_verification(up, false); | |
298 | } | |
299 | ||
300 | void join_timer_start(struct pim_upstream *up) | |
301 | { | |
302 | struct pim_neighbor *nbr = NULL; | |
303 | ||
304 | if (up->rpf.source_nexthop.interface) { | |
305 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, | |
306 | up->rpf.rpf_addr.u.prefix4); | |
307 | ||
308 | if (PIM_DEBUG_PIM_EVENTS) { | |
309 | zlog_debug( | |
310 | "%s: starting %d sec timer for upstream (S,G)=%s", | |
311 | __PRETTY_FUNCTION__, qpim_t_periodic, | |
312 | up->sg_str); | |
313 | } | |
314 | } | |
315 | ||
316 | if (nbr) | |
317 | pim_jp_agg_add_group(nbr->upstream_jp_agg, up, 1); | |
318 | else { | |
319 | THREAD_OFF(up->t_join_timer); | |
320 | thread_add_timer(master, on_join_timer, up, qpim_t_periodic, | |
321 | &up->t_join_timer); | |
322 | } | |
323 | pim_jp_agg_upstream_verification(up, true); | |
324 | } | |
325 | ||
326 | /* | |
327 | * This is only called when we are switching the upstream | |
328 | * J/P from one neighbor to another | |
329 | * | |
330 | * As such we need to remove from the old list and | |
331 | * add to the new list. | |
332 | */ | |
333 | void pim_upstream_join_timer_restart(struct pim_upstream *up, | |
334 | struct pim_rpf *old) | |
335 | { | |
336 | // THREAD_OFF(up->t_join_timer); | |
337 | join_timer_start(up); | |
338 | } | |
339 | ||
340 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
341 | int interval_msec) | |
342 | { | |
343 | if (PIM_DEBUG_PIM_EVENTS) { | |
344 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", | |
345 | __PRETTY_FUNCTION__, interval_msec, up->sg_str); | |
346 | } | |
347 | ||
348 | THREAD_OFF(up->t_join_timer); | |
349 | thread_add_timer_msec(master, on_join_timer, up, interval_msec, | |
350 | &up->t_join_timer); | |
351 | } | |
352 | ||
353 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
354 | struct in_addr rpf_addr, int holdtime) | |
355 | { | |
356 | long t_joinsuppress_msec; | |
357 | long join_timer_remain_msec; | |
358 | ||
359 | t_joinsuppress_msec = | |
360 | MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
361 | 1000 * holdtime); | |
362 | ||
363 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
364 | ||
365 | if (PIM_DEBUG_TRACE) { | |
366 | char rpf_str[INET_ADDRSTRLEN]; | |
367 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); | |
368 | zlog_debug( | |
369 | "%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", | |
370 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
371 | join_timer_remain_msec, t_joinsuppress_msec); | |
372 | } | |
373 | ||
374 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
375 | if (PIM_DEBUG_TRACE) { | |
376 | zlog_debug( | |
377 | "%s %s: suppressing Join(S,G)=%s for %ld msec", | |
378 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, | |
379 | t_joinsuppress_msec); | |
380 | } | |
381 | ||
382 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
383 | } | |
384 | } | |
385 | ||
386 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
387 | struct pim_upstream *up) | |
388 | { | |
389 | long join_timer_remain_msec; | |
390 | int t_override_msec; | |
391 | ||
392 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
393 | t_override_msec = | |
394 | pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
395 | ||
396 | if (PIM_DEBUG_TRACE) { | |
397 | char rpf_str[INET_ADDRSTRLEN]; | |
398 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr.u.prefix4, rpf_str, | |
399 | sizeof(rpf_str)); | |
400 | zlog_debug( | |
401 | "%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", | |
402 | debug_label, up->sg_str, rpf_str, | |
403 | join_timer_remain_msec, t_override_msec); | |
404 | } | |
405 | ||
406 | if (join_timer_remain_msec > t_override_msec) { | |
407 | if (PIM_DEBUG_TRACE) { | |
408 | zlog_debug( | |
409 | "%s: decreasing (S,G)=%s join timer to t_override=%d msec", | |
410 | debug_label, up->sg_str, t_override_msec); | |
411 | } | |
412 | ||
413 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
414 | } | |
415 | } | |
416 | ||
417 | static void forward_on(struct pim_upstream *up) | |
418 | { | |
419 | struct listnode *chnode; | |
420 | struct listnode *chnextnode; | |
421 | struct pim_ifchannel *ch = NULL; | |
422 | ||
423 | /* scan (S,G) state */ | |
424 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
425 | if (pim_macro_chisin_oiflist(ch)) | |
426 | pim_forward_start(ch); | |
427 | ||
428 | } /* scan iface channel list */ | |
429 | } | |
430 | ||
431 | static void forward_off(struct pim_upstream *up) | |
432 | { | |
433 | struct listnode *chnode; | |
434 | struct listnode *chnextnode; | |
435 | struct pim_ifchannel *ch; | |
436 | ||
437 | /* scan per-interface (S,G) state */ | |
438 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
439 | ||
440 | pim_forward_stop(ch, false); | |
441 | ||
442 | } /* scan iface channel list */ | |
443 | } | |
444 | ||
445 | static int pim_upstream_could_register(struct pim_upstream *up) | |
446 | { | |
447 | struct pim_interface *pim_ifp = NULL; | |
448 | ||
449 | if (up->rpf.source_nexthop.interface) | |
450 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
451 | else { | |
452 | if (PIM_DEBUG_TRACE) | |
453 | zlog_debug("%s: up %s RPF is not present", | |
454 | __PRETTY_FUNCTION__, up->sg_str); | |
455 | } | |
456 | ||
457 | if (pim_ifp && PIM_I_am_DR(pim_ifp) | |
458 | && pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
459 | up->sg.src)) | |
460 | return 1; | |
461 | ||
462 | return 0; | |
463 | } | |
464 | ||
465 | /* Source registration is suppressed for SSM groups. When the SSM range changes | |
466 | * we re-revaluate register setup for existing upstream entries */ | |
467 | void pim_upstream_register_reevaluate(struct pim_instance *pim) | |
468 | { | |
469 | struct listnode *upnode; | |
470 | struct pim_upstream *up; | |
471 | ||
472 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { | |
473 | /* If FHR is set CouldRegister is True. Also check if the flow | |
474 | * is actually active; if it is not kat setup will trigger | |
475 | * source | |
476 | * registration whenever the flow becomes active. */ | |
477 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) || !up->t_ka_timer) | |
478 | continue; | |
479 | ||
480 | if (pim_is_grp_ssm(pim, up->sg.grp)) { | |
481 | /* clear the register state for SSM groups */ | |
482 | if (up->reg_state != PIM_REG_NOINFO) { | |
483 | if (PIM_DEBUG_PIM_EVENTS) | |
484 | zlog_debug( | |
485 | "Clear register for %s as G is now SSM", | |
486 | up->sg_str); | |
487 | /* remove regiface from the OIL if it is there*/ | |
488 | pim_channel_del_oif(up->channel_oil, | |
489 | pim->regiface, | |
490 | PIM_OIF_FLAG_PROTO_PIM); | |
491 | up->reg_state = PIM_REG_NOINFO; | |
492 | } | |
493 | } else { | |
494 | /* register ASM sources with the RP */ | |
495 | if (up->reg_state == PIM_REG_NOINFO) { | |
496 | if (PIM_DEBUG_PIM_EVENTS) | |
497 | zlog_debug( | |
498 | "Register %s as G is now ASM", | |
499 | up->sg_str); | |
500 | pim_channel_add_oif(up->channel_oil, | |
501 | pim->regiface, | |
502 | PIM_OIF_FLAG_PROTO_PIM); | |
503 | up->reg_state = PIM_REG_JOIN; | |
504 | } | |
505 | } | |
506 | } | |
507 | } | |
508 | ||
509 | void pim_upstream_switch(struct pim_instance *pim, struct pim_upstream *up, | |
510 | enum pim_upstream_state new_state) | |
511 | { | |
512 | enum pim_upstream_state old_state = up->join_state; | |
513 | ||
514 | if (PIM_DEBUG_PIM_EVENTS) { | |
515 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", | |
516 | __PRETTY_FUNCTION__, up->sg_str, | |
517 | pim_upstream_state2str(up->join_state), | |
518 | pim_upstream_state2str(new_state)); | |
519 | } | |
520 | ||
521 | up->join_state = new_state; | |
522 | if (old_state != new_state) | |
523 | up->state_transition = pim_time_monotonic_sec(); | |
524 | ||
525 | pim_upstream_update_assert_tracking_desired(up); | |
526 | ||
527 | if (new_state == PIM_UPSTREAM_JOINED) { | |
528 | if (old_state != PIM_UPSTREAM_JOINED) { | |
529 | int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags); | |
530 | forward_on(up); | |
531 | pim_msdp_up_join_state_changed(pim, up); | |
532 | if (pim_upstream_could_register(up)) { | |
533 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
534 | if (!old_fhr | |
535 | && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM( | |
536 | up->flags)) { | |
537 | pim_upstream_keep_alive_timer_start( | |
538 | up, pim->keep_alive_time); | |
539 | pim_register_join(up); | |
540 | } | |
541 | } else { | |
542 | pim_upstream_send_join(up); | |
543 | join_timer_start(up); | |
544 | } | |
545 | } else { | |
546 | forward_on(up); | |
547 | } | |
548 | } else { | |
549 | ||
550 | forward_off(up); | |
551 | if (old_state == PIM_UPSTREAM_JOINED) | |
552 | pim_msdp_up_join_state_changed(pim, up); | |
553 | ||
554 | /* IHR, Trigger SGRpt on *,G IIF to prune S,G from RPT towards | |
555 | RP. | |
556 | If I am RP for G then send S,G prune to its IIF. */ | |
557 | if (pim_upstream_is_sg_rpt(up) && up->parent | |
558 | && !I_am_RP(pim, up->sg.grp)) { | |
559 | if (PIM_DEBUG_PIM_TRACE_DETAIL) | |
560 | zlog_debug( | |
561 | "%s: *,G IIF %s S,G IIF %s ", | |
562 | __PRETTY_FUNCTION__, | |
563 | up->parent->rpf.source_nexthop | |
564 | .interface->name, | |
565 | up->rpf.source_nexthop.interface->name); | |
566 | pim_jp_agg_single_upstream_send(&up->parent->rpf, | |
567 | up->parent, | |
568 | 1 /* (W,G) Join */); | |
569 | } else | |
570 | pim_jp_agg_single_upstream_send(&up->rpf, up, | |
571 | 0 /* prune */); | |
572 | join_timer_stop(up); | |
573 | } | |
574 | } | |
575 | ||
576 | int pim_upstream_compare(void *arg1, void *arg2) | |
577 | { | |
578 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; | |
579 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
580 | ||
581 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) | |
582 | return -1; | |
583 | ||
584 | if (ntohl(up1->sg.grp.s_addr) > ntohl(up2->sg.grp.s_addr)) | |
585 | return 1; | |
586 | ||
587 | if (ntohl(up1->sg.src.s_addr) < ntohl(up2->sg.src.s_addr)) | |
588 | return -1; | |
589 | ||
590 | if (ntohl(up1->sg.src.s_addr) > ntohl(up2->sg.src.s_addr)) | |
591 | return 1; | |
592 | ||
593 | return 0; | |
594 | } | |
595 | ||
596 | static struct pim_upstream *pim_upstream_new(struct pim_instance *pim, | |
597 | struct prefix_sg *sg, | |
598 | struct interface *incoming, | |
599 | int flags, | |
600 | struct pim_ifchannel *ch) | |
601 | { | |
602 | enum pim_rpf_result rpf_result; | |
603 | struct pim_interface *pim_ifp; | |
604 | struct pim_upstream *up; | |
605 | ||
606 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); | |
607 | ||
608 | up->sg = *sg; | |
609 | pim_str_sg_set(sg, up->sg_str); | |
610 | if (ch) | |
611 | ch->upstream = up; | |
612 | ||
613 | up = hash_get(pim->upstream_hash, up, hash_alloc_intern); | |
614 | if (!pim_rp_set_upstream_addr(pim, &up->upstream_addr, sg->src, | |
615 | sg->grp)) { | |
616 | if (PIM_DEBUG_TRACE) | |
617 | zlog_debug("%s: Received a (*,G) with no RP configured", | |
618 | __PRETTY_FUNCTION__); | |
619 | ||
620 | hash_release(pim->upstream_hash, up); | |
621 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
622 | return NULL; | |
623 | } | |
624 | ||
625 | up->parent = pim_upstream_find_parent(pim, up); | |
626 | if (up->sg.src.s_addr == INADDR_ANY) { | |
627 | up->sources = list_new(); | |
628 | up->sources->cmp = pim_upstream_compare; | |
629 | } else | |
630 | up->sources = NULL; | |
631 | ||
632 | pim_upstream_find_new_children(pim, up); | |
633 | up->flags = flags; | |
634 | up->ref_count = 1; | |
635 | up->t_join_timer = NULL; | |
636 | up->t_ka_timer = NULL; | |
637 | up->t_rs_timer = NULL; | |
638 | up->t_msdp_reg_timer = NULL; | |
639 | up->join_state = PIM_UPSTREAM_NOTJOINED; | |
640 | up->reg_state = PIM_REG_NOINFO; | |
641 | up->state_transition = pim_time_monotonic_sec(); | |
642 | up->channel_oil = NULL; | |
643 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; | |
644 | ||
645 | up->rpf.source_nexthop.interface = NULL; | |
646 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; | |
647 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = | |
648 | PIM_NET_INADDR_ANY; | |
649 | up->rpf.source_nexthop.mrib_metric_preference = | |
650 | qpim_infinite_assert_metric.metric_preference; | |
651 | up->rpf.source_nexthop.mrib_route_metric = | |
652 | qpim_infinite_assert_metric.route_metric; | |
653 | up->rpf.rpf_addr.family = AF_INET; | |
654 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
655 | ||
656 | up->ifchannels = list_new(); | |
657 | up->ifchannels->cmp = (int (*)(void *, void *))pim_ifchannel_compare; | |
658 | ||
659 | if (up->sg.src.s_addr != INADDR_ANY) | |
660 | wheel_add_item(pim->upstream_sg_wheel, up); | |
661 | ||
662 | rpf_result = pim_rpf_update(pim, up, NULL, 1); | |
663 | if (rpf_result == PIM_RPF_FAILURE) { | |
664 | struct prefix nht_p; | |
665 | ||
666 | if (PIM_DEBUG_TRACE) | |
667 | zlog_debug( | |
668 | "%s: Attempting to create upstream(%s), Unable to RPF for source", | |
669 | __PRETTY_FUNCTION__, up->sg_str); | |
670 | ||
671 | nht_p.family = AF_INET; | |
672 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
673 | nht_p.u.prefix4 = up->upstream_addr; | |
674 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL); | |
675 | ||
676 | if (up->parent) { | |
677 | listnode_delete(up->parent->sources, up); | |
678 | up->parent = NULL; | |
679 | } | |
680 | ||
681 | if (up->sg.src.s_addr != INADDR_ANY) | |
682 | wheel_remove_item(pim->upstream_sg_wheel, up); | |
683 | ||
684 | pim_upstream_remove_children(pim, up); | |
685 | if (up->sources) | |
686 | list_delete(&up->sources); | |
687 | ||
688 | list_delete(&up->ifchannels); | |
689 | ||
690 | hash_release(pim->upstream_hash, up); | |
691 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
692 | return NULL; | |
693 | } | |
694 | ||
695 | if (up->rpf.source_nexthop.interface) { | |
696 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
697 | if (pim_ifp) | |
698 | up->channel_oil = pim_channel_oil_add( | |
699 | pim, &up->sg, pim_ifp->mroute_vif_index); | |
700 | } | |
701 | listnode_add_sort(pim->upstream_list, up); | |
702 | ||
703 | if (PIM_DEBUG_TRACE) { | |
704 | zlog_debug( | |
705 | "%s: Created Upstream %s upstream_addr %s ref count %d increment", | |
706 | __PRETTY_FUNCTION__, up->sg_str, | |
707 | inet_ntoa(up->upstream_addr), up->ref_count); | |
708 | } | |
709 | ||
710 | return up; | |
711 | } | |
712 | ||
713 | struct pim_upstream *pim_upstream_find(struct pim_instance *pim, | |
714 | struct prefix_sg *sg) | |
715 | { | |
716 | struct pim_upstream lookup; | |
717 | struct pim_upstream *up = NULL; | |
718 | ||
719 | lookup.sg = *sg; | |
720 | up = hash_lookup(pim->upstream_hash, &lookup); | |
721 | return up; | |
722 | } | |
723 | ||
724 | struct pim_upstream *pim_upstream_find_or_add(struct prefix_sg *sg, | |
725 | struct interface *incoming, | |
726 | int flags, const char *name) | |
727 | { | |
728 | struct pim_upstream *up; | |
729 | struct pim_interface *pim_ifp; | |
730 | ||
731 | pim_ifp = incoming->info; | |
732 | ||
733 | up = pim_upstream_find(pim_ifp->pim, sg); | |
734 | ||
735 | if (up) { | |
736 | if (!(up->flags & flags)) { | |
737 | up->flags |= flags; | |
738 | up->ref_count++; | |
739 | if (PIM_DEBUG_TRACE) | |
740 | zlog_debug( | |
741 | "%s(%s): upstream %s ref count %d increment", | |
742 | __PRETTY_FUNCTION__, name, up->sg_str, | |
743 | up->ref_count); | |
744 | } | |
745 | } else | |
746 | up = pim_upstream_add(pim_ifp->pim, sg, incoming, flags, name, | |
747 | NULL); | |
748 | ||
749 | return up; | |
750 | } | |
751 | ||
752 | void pim_upstream_ref(struct pim_upstream *up, int flags, const char *name) | |
753 | { | |
754 | up->flags |= flags; | |
755 | ++up->ref_count; | |
756 | if (PIM_DEBUG_TRACE) | |
757 | zlog_debug("%s(%s): upstream %s ref count %d increment", | |
758 | __PRETTY_FUNCTION__, name, up->sg_str, | |
759 | up->ref_count); | |
760 | } | |
761 | ||
762 | struct pim_upstream *pim_upstream_add(struct pim_instance *pim, | |
763 | struct prefix_sg *sg, | |
764 | struct interface *incoming, int flags, | |
765 | const char *name, | |
766 | struct pim_ifchannel *ch) | |
767 | { | |
768 | struct pim_upstream *up = NULL; | |
769 | int found = 0; | |
770 | ||
771 | up = pim_upstream_find(pim, sg); | |
772 | if (up) { | |
773 | pim_upstream_ref(up, flags, name); | |
774 | found = 1; | |
775 | } else { | |
776 | up = pim_upstream_new(pim, sg, incoming, flags, ch); | |
777 | } | |
778 | ||
779 | if (PIM_DEBUG_TRACE) { | |
780 | if (up) { | |
781 | char buf[PREFIX2STR_BUFFER]; | |
782 | prefix2str(&up->rpf.rpf_addr, buf, sizeof(buf)); | |
783 | zlog_debug("%s(%s): %s, iif %s (%s) found: %d: ref_count: %d", | |
784 | __PRETTY_FUNCTION__, name, | |
785 | up->sg_str, buf, up->rpf.source_nexthop.interface ? | |
786 | up->rpf.source_nexthop.interface->name : "NIL" , | |
787 | found, up->ref_count); | |
788 | } else | |
789 | zlog_debug("%s(%s): (%s) failure to create", | |
790 | __PRETTY_FUNCTION__, name, | |
791 | pim_str_sg_dump(sg)); | |
792 | } | |
793 | ||
794 | return up; | |
795 | } | |
796 | ||
797 | /* | |
798 | * Passed in up must be the upstream for ch. starch is NULL if no | |
799 | * information | |
800 | */ | |
801 | int pim_upstream_evaluate_join_desired_interface(struct pim_upstream *up, | |
802 | struct pim_ifchannel *ch, | |
803 | struct pim_ifchannel *starch) | |
804 | { | |
805 | if (ch) { | |
806 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
807 | return 0; | |
808 | ||
809 | if (!pim_macro_ch_lost_assert(ch) | |
810 | && pim_macro_chisin_joins_or_include(ch)) | |
811 | return 1; | |
812 | } | |
813 | ||
814 | /* | |
815 | * joins (*,G) | |
816 | */ | |
817 | if (starch) { | |
818 | if (PIM_IF_FLAG_TEST_S_G_RPT(starch->upstream->flags)) | |
819 | return 0; | |
820 | ||
821 | if (!pim_macro_ch_lost_assert(starch) | |
822 | && pim_macro_chisin_joins_or_include(starch)) | |
823 | return 1; | |
824 | } | |
825 | ||
826 | return 0; | |
827 | } | |
828 | ||
829 | /* | |
830 | Evaluate JoinDesired(S,G): | |
831 | ||
832 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
833 | in the set: | |
834 | ||
835 | inherited_olist(S,G) = | |
836 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
837 | ||
838 | JoinDesired(S,G) may be affected by changes in the following: | |
839 | ||
840 | pim_ifp->primary_address | |
841 | pim_ifp->pim_dr_addr | |
842 | ch->ifassert_winner_metric | |
843 | ch->ifassert_winner | |
844 | ch->local_ifmembership | |
845 | ch->ifjoin_state | |
846 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
847 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
848 | ch->upstream->rpf.source_nexthop.interface | |
849 | ||
850 | See also pim_upstream_update_join_desired() below. | |
851 | */ | |
852 | int pim_upstream_evaluate_join_desired(struct pim_instance *pim, | |
853 | struct pim_upstream *up) | |
854 | { | |
855 | struct interface *ifp; | |
856 | struct pim_ifchannel *ch, *starch; | |
857 | struct pim_upstream *starup = up->parent; | |
858 | int ret = 0; | |
859 | ||
860 | FOR_ALL_INTERFACES (pim->vrf, ifp) { | |
861 | if (!ifp->info) | |
862 | continue; | |
863 | ||
864 | ch = pim_ifchannel_find(ifp, &up->sg); | |
865 | ||
866 | if (starup) | |
867 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
868 | else | |
869 | starch = NULL; | |
870 | ||
871 | if (!ch && !starch) | |
872 | continue; | |
873 | ||
874 | ret += pim_upstream_evaluate_join_desired_interface(up, ch, | |
875 | starch); | |
876 | } /* scan iface channel list */ | |
877 | ||
878 | return ret; /* false */ | |
879 | } | |
880 | ||
881 | /* | |
882 | See also pim_upstream_evaluate_join_desired() above. | |
883 | */ | |
884 | void pim_upstream_update_join_desired(struct pim_instance *pim, | |
885 | struct pim_upstream *up) | |
886 | { | |
887 | int was_join_desired; /* boolean */ | |
888 | int is_join_desired; /* boolean */ | |
889 | ||
890 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
891 | ||
892 | is_join_desired = pim_upstream_evaluate_join_desired(pim, up); | |
893 | if (is_join_desired) | |
894 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
895 | else | |
896 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
897 | ||
898 | /* switched from false to true */ | |
899 | if (is_join_desired && !was_join_desired) { | |
900 | pim_upstream_switch(pim, up, PIM_UPSTREAM_JOINED); | |
901 | return; | |
902 | } | |
903 | ||
904 | /* switched from true to false */ | |
905 | if (!is_join_desired && was_join_desired) { | |
906 | pim_upstream_switch(pim, up, PIM_UPSTREAM_NOTJOINED); | |
907 | return; | |
908 | } | |
909 | } | |
910 | ||
911 | /* | |
912 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
913 | Transitions from Joined State | |
914 | RPF'(S,G) GenID changes | |
915 | ||
916 | The upstream (S,G) state machine remains in Joined state. If the | |
917 | Join Timer is set to expire in more than t_override seconds, reset | |
918 | it so that it expires after t_override seconds. | |
919 | */ | |
920 | void pim_upstream_rpf_genid_changed(struct pim_instance *pim, | |
921 | struct in_addr neigh_addr) | |
922 | { | |
923 | struct listnode *up_node; | |
924 | struct listnode *up_nextnode; | |
925 | struct pim_upstream *up; | |
926 | ||
927 | /* | |
928 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
929 | */ | |
930 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { | |
931 | ||
932 | if (PIM_DEBUG_TRACE) { | |
933 | char neigh_str[INET_ADDRSTRLEN]; | |
934 | char rpf_addr_str[PREFIX_STRLEN]; | |
935 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, | |
936 | sizeof(neigh_str)); | |
937 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, | |
938 | sizeof(rpf_addr_str)); | |
939 | zlog_debug( | |
940 | "%s: matching neigh=%s against upstream (S,G)=%s[%s] joined=%d rpf_addr=%s", | |
941 | __PRETTY_FUNCTION__, neigh_str, up->sg_str, | |
942 | pim->vrf->name, | |
943 | up->join_state == PIM_UPSTREAM_JOINED, | |
944 | rpf_addr_str); | |
945 | } | |
946 | ||
947 | /* consider only (S,G) upstream in Joined state */ | |
948 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
949 | continue; | |
950 | ||
951 | /* match RPF'(S,G)=neigh_addr */ | |
952 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) | |
953 | continue; | |
954 | ||
955 | pim_upstream_join_timer_decrease_to_t_override( | |
956 | "RPF'(S,G) GenID change", up); | |
957 | } | |
958 | } | |
959 | ||
960 | ||
961 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
962 | struct interface *old_rpf_ifp) | |
963 | { | |
964 | struct listnode *chnode; | |
965 | struct listnode *chnextnode; | |
966 | struct pim_ifchannel *ch; | |
967 | ||
968 | /* search all ifchannels */ | |
969 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
970 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
971 | if ( | |
972 | /* RPF_interface(S) was NOT I */ | |
973 | (old_rpf_ifp == ch->interface) && | |
974 | /* RPF_interface(S) stopped being I */ | |
975 | (ch->upstream->rpf.source_nexthop | |
976 | .interface != ch->interface)) { | |
977 | assert_action_a5(ch); | |
978 | } | |
979 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
980 | ||
981 | pim_ifchannel_update_assert_tracking_desired(ch); | |
982 | } | |
983 | } | |
984 | ||
985 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
986 | { | |
987 | struct listnode *chnode; | |
988 | struct listnode *chnextnode; | |
989 | struct pim_ifchannel *ch; | |
990 | ||
991 | /* scan per-interface (S,G) state */ | |
992 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
993 | pim_ifchannel_update_could_assert(ch); | |
994 | } /* scan iface channel list */ | |
995 | } | |
996 | ||
997 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
998 | { | |
999 | struct listnode *chnode; | |
1000 | struct listnode *chnextnode; | |
1001 | struct pim_ifchannel *ch; | |
1002 | ||
1003 | /* scan per-interface (S,G) state */ | |
1004 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1005 | pim_ifchannel_update_my_assert_metric(ch); | |
1006 | ||
1007 | } /* scan iface channel list */ | |
1008 | } | |
1009 | ||
1010 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
1011 | { | |
1012 | struct listnode *chnode; | |
1013 | struct listnode *chnextnode; | |
1014 | struct pim_interface *pim_ifp; | |
1015 | struct pim_ifchannel *ch; | |
1016 | ||
1017 | /* scan per-interface (S,G) state */ | |
1018 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1019 | if (!ch->interface) | |
1020 | continue; | |
1021 | pim_ifp = ch->interface->info; | |
1022 | if (!pim_ifp) | |
1023 | continue; | |
1024 | ||
1025 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1026 | ||
1027 | } /* scan iface channel list */ | |
1028 | } | |
1029 | ||
1030 | /* When kat is stopped CouldRegister goes to false so we need to | |
1031 | * transition the (S, G) on FHR to NI state and remove reg tunnel | |
1032 | * from the OIL */ | |
1033 | static void pim_upstream_fhr_kat_expiry(struct pim_instance *pim, | |
1034 | struct pim_upstream *up) | |
1035 | { | |
1036 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) | |
1037 | return; | |
1038 | ||
1039 | if (PIM_DEBUG_TRACE) | |
1040 | zlog_debug("kat expired on %s; clear fhr reg state", | |
1041 | up->sg_str); | |
1042 | ||
1043 | /* stop reg-stop timer */ | |
1044 | THREAD_OFF(up->t_rs_timer); | |
1045 | /* remove regiface from the OIL if it is there*/ | |
1046 | pim_channel_del_oif(up->channel_oil, pim->regiface, | |
1047 | PIM_OIF_FLAG_PROTO_PIM); | |
1048 | /* clear the register state */ | |
1049 | up->reg_state = PIM_REG_NOINFO; | |
1050 | PIM_UPSTREAM_FLAG_UNSET_FHR(up->flags); | |
1051 | } | |
1052 | ||
1053 | /* When kat is started CouldRegister can go to true. And if it does we | |
1054 | * need to transition the (S, G) on FHR to JOINED state and add reg tunnel | |
1055 | * to the OIL */ | |
1056 | static void pim_upstream_fhr_kat_start(struct pim_upstream *up) | |
1057 | { | |
1058 | if (pim_upstream_could_register(up)) { | |
1059 | if (PIM_DEBUG_TRACE) | |
1060 | zlog_debug( | |
1061 | "kat started on %s; set fhr reg state to joined", | |
1062 | up->sg_str); | |
1063 | ||
1064 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
1065 | if (up->reg_state == PIM_REG_NOINFO) | |
1066 | pim_register_join(up); | |
1067 | } | |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | * On an RP, the PMBR value must be cleared when the | |
1072 | * Keepalive Timer expires | |
1073 | * KAT expiry indicates that flow is inactive. If the flow was created or | |
1074 | * maintained by activity now is the time to deref it. | |
1075 | */ | |
1076 | static int pim_upstream_keep_alive_timer(struct thread *t) | |
1077 | { | |
1078 | struct pim_upstream *up; | |
1079 | struct pim_instance *pim; | |
1080 | ||
1081 | up = THREAD_ARG(t); | |
1082 | pim = up->channel_oil->pim; | |
1083 | ||
1084 | if (I_am_RP(pim, up->sg.grp)) { | |
1085 | pim_br_clear_pmbr(&up->sg); | |
1086 | /* | |
1087 | * We need to do more here :) | |
1088 | * But this is the start. | |
1089 | */ | |
1090 | } | |
1091 | ||
1092 | /* source is no longer active - pull the SA from MSDP's cache */ | |
1093 | pim_msdp_sa_local_del(pim, &up->sg); | |
1094 | ||
1095 | /* if entry was created because of activity we need to deref it */ | |
1096 | if (PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
1097 | pim_upstream_fhr_kat_expiry(pim, up); | |
1098 | if (PIM_DEBUG_TRACE) | |
1099 | zlog_debug( | |
1100 | "kat expired on %s[%s]; remove stream reference", | |
1101 | up->sg_str, pim->vrf->name); | |
1102 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(up->flags); | |
1103 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); | |
1104 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) { | |
1105 | struct pim_upstream *parent = up->parent; | |
1106 | ||
1107 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(up->flags); | |
1108 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); | |
1109 | ||
1110 | if (parent) { | |
1111 | pim_jp_agg_single_upstream_send(&parent->rpf, parent, | |
1112 | true); | |
1113 | } | |
1114 | } | |
1115 | ||
1116 | return 0; | |
1117 | } | |
1118 | ||
1119 | void pim_upstream_keep_alive_timer_start(struct pim_upstream *up, uint32_t time) | |
1120 | { | |
1121 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
1122 | if (PIM_DEBUG_TRACE) | |
1123 | zlog_debug("kat start on %s with no stream reference", | |
1124 | up->sg_str); | |
1125 | } | |
1126 | THREAD_OFF(up->t_ka_timer); | |
1127 | thread_add_timer(master, pim_upstream_keep_alive_timer, up, time, | |
1128 | &up->t_ka_timer); | |
1129 | ||
1130 | /* any time keepalive is started against a SG we will have to | |
1131 | * re-evaluate our active source database */ | |
1132 | pim_msdp_sa_local_update(up); | |
1133 | } | |
1134 | ||
1135 | /* MSDP on RP needs to know if a source is registerable to this RP */ | |
1136 | static int pim_upstream_msdp_reg_timer(struct thread *t) | |
1137 | { | |
1138 | struct pim_upstream *up = THREAD_ARG(t); | |
1139 | struct pim_instance *pim = up->channel_oil->pim; | |
1140 | ||
1141 | /* source is no longer active - pull the SA from MSDP's cache */ | |
1142 | pim_msdp_sa_local_del(pim, &up->sg); | |
1143 | return 1; | |
1144 | } | |
1145 | void pim_upstream_msdp_reg_timer_start(struct pim_upstream *up) | |
1146 | { | |
1147 | THREAD_OFF(up->t_msdp_reg_timer); | |
1148 | thread_add_timer(master, pim_upstream_msdp_reg_timer, up, | |
1149 | PIM_MSDP_REG_RXED_PERIOD, &up->t_msdp_reg_timer); | |
1150 | ||
1151 | pim_msdp_sa_local_update(up); | |
1152 | } | |
1153 | ||
1154 | /* | |
1155 | * 4.2.1 Last-Hop Switchover to the SPT | |
1156 | * | |
1157 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
1158 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
1159 | * router, it has the option of switching to receive the traffic on a | |
1160 | * shortest path tree (SPT). | |
1161 | * | |
1162 | * The decision for a router to switch to the SPT is controlled as | |
1163 | * follows: | |
1164 | * | |
1165 | * void | |
1166 | * CheckSwitchToSpt(S,G) { | |
1167 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
1168 | * (+) pim_include(S,G) != NULL ) | |
1169 | * AND SwitchToSptDesired(S,G) ) { | |
1170 | * # Note: Restarting the KAT will result in the SPT switch | |
1171 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1172 | * } | |
1173 | * } | |
1174 | * | |
1175 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
1176 | * defined. An "infinite threshold" policy can be implemented by making | |
1177 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
1178 | * first packet" policy can be implemented by making | |
1179 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
1180 | * received for the source and group. | |
1181 | */ | |
1182 | int pim_upstream_switch_to_spt_desired(struct pim_instance *pim, | |
1183 | struct prefix_sg *sg) | |
1184 | { | |
1185 | if (I_am_RP(pim, sg->grp)) | |
1186 | return 1; | |
1187 | ||
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | int pim_upstream_is_sg_rpt(struct pim_upstream *up) | |
1192 | { | |
1193 | struct listnode *chnode; | |
1194 | struct pim_ifchannel *ch; | |
1195 | ||
1196 | for (ALL_LIST_ELEMENTS_RO(up->ifchannels, chnode, ch)) { | |
1197 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
1198 | return 1; | |
1199 | } | |
1200 | ||
1201 | return 0; | |
1202 | } | |
1203 | /* | |
1204 | * After receiving a packet set SPTbit: | |
1205 | * void | |
1206 | * Update_SPTbit(S,G,iif) { | |
1207 | * if ( iif == RPF_interface(S) | |
1208 | * AND JoinDesired(S,G) == TRUE | |
1209 | * AND ( DirectlyConnected(S) == TRUE | |
1210 | * OR RPF_interface(S) != RPF_interface(RP(G)) | |
1211 | * OR inherited_olist(S,G,rpt) == NULL | |
1212 | * OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1213 | * ( RPF'(S,G) != NULL ) ) | |
1214 | * OR ( I_Am_Assert_Loser(S,G,iif) ) { | |
1215 | * Set SPTbit(S,G) to TRUE | |
1216 | * } | |
1217 | * } | |
1218 | */ | |
1219 | void pim_upstream_set_sptbit(struct pim_upstream *up, | |
1220 | struct interface *incoming) | |
1221 | { | |
1222 | struct pim_upstream *starup = up->parent; | |
1223 | ||
1224 | // iif == RPF_interfvace(S) | |
1225 | if (up->rpf.source_nexthop.interface != incoming) { | |
1226 | if (PIM_DEBUG_TRACE) | |
1227 | zlog_debug( | |
1228 | "%s: Incoming Interface: %s is different than RPF_interface(S) %s", | |
1229 | __PRETTY_FUNCTION__, incoming->name, | |
1230 | up->rpf.source_nexthop.interface->name); | |
1231 | return; | |
1232 | } | |
1233 | ||
1234 | // AND JoinDesired(S,G) == TRUE | |
1235 | // FIXME | |
1236 | ||
1237 | // DirectlyConnected(S) == TRUE | |
1238 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1239 | up->sg.src)) { | |
1240 | if (PIM_DEBUG_TRACE) | |
1241 | zlog_debug("%s: %s is directly connected to the source", | |
1242 | __PRETTY_FUNCTION__, up->sg_str); | |
1243 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1244 | return; | |
1245 | } | |
1246 | ||
1247 | // OR RPF_interface(S) != RPF_interface(RP(G)) | |
1248 | if (!starup | |
1249 | || up->rpf.source_nexthop | |
1250 | .interface != starup->rpf.source_nexthop.interface) { | |
1251 | if (PIM_DEBUG_TRACE) | |
1252 | zlog_debug( | |
1253 | "%s: %s RPF_interface(S) != RPF_interface(RP(G))", | |
1254 | __PRETTY_FUNCTION__, up->sg_str); | |
1255 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1256 | return; | |
1257 | } | |
1258 | ||
1259 | // OR inherited_olist(S,G,rpt) == NULL | |
1260 | if (pim_upstream_is_sg_rpt(up) | |
1261 | && pim_upstream_empty_inherited_olist(up)) { | |
1262 | if (PIM_DEBUG_TRACE) | |
1263 | zlog_debug("%s: %s OR inherited_olist(S,G,rpt) == NULL", | |
1264 | __PRETTY_FUNCTION__, up->sg_str); | |
1265 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1266 | return; | |
1267 | } | |
1268 | ||
1269 | // OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1270 | // ( RPF'(S,G) != NULL ) ) | |
1271 | if (up->parent && pim_rpf_is_same(&up->rpf, &up->parent->rpf)) { | |
1272 | if (PIM_DEBUG_TRACE) | |
1273 | zlog_debug("%s: %s RPF'(S,G) is the same as RPF'(*,G)", | |
1274 | __PRETTY_FUNCTION__, up->sg_str); | |
1275 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1276 | return; | |
1277 | } | |
1278 | ||
1279 | return; | |
1280 | } | |
1281 | ||
1282 | const char *pim_upstream_state2str(enum pim_upstream_state join_state) | |
1283 | { | |
1284 | switch (join_state) { | |
1285 | case PIM_UPSTREAM_NOTJOINED: | |
1286 | return "NotJoined"; | |
1287 | break; | |
1288 | case PIM_UPSTREAM_JOINED: | |
1289 | return "Joined"; | |
1290 | break; | |
1291 | } | |
1292 | return "Unknown"; | |
1293 | } | |
1294 | ||
1295 | const char *pim_reg_state2str(enum pim_reg_state reg_state, char *state_str) | |
1296 | { | |
1297 | switch (reg_state) { | |
1298 | case PIM_REG_NOINFO: | |
1299 | strcpy(state_str, "RegNoInfo"); | |
1300 | break; | |
1301 | case PIM_REG_JOIN: | |
1302 | strcpy(state_str, "RegJoined"); | |
1303 | break; | |
1304 | case PIM_REG_JOIN_PENDING: | |
1305 | strcpy(state_str, "RegJoinPend"); | |
1306 | break; | |
1307 | case PIM_REG_PRUNE: | |
1308 | strcpy(state_str, "RegPrune"); | |
1309 | break; | |
1310 | default: | |
1311 | strcpy(state_str, "RegUnknown"); | |
1312 | } | |
1313 | return state_str; | |
1314 | } | |
1315 | ||
1316 | static int pim_upstream_register_stop_timer(struct thread *t) | |
1317 | { | |
1318 | struct pim_interface *pim_ifp; | |
1319 | struct pim_instance *pim; | |
1320 | struct pim_upstream *up; | |
1321 | struct pim_rpf *rpg; | |
1322 | struct ip ip_hdr; | |
1323 | up = THREAD_ARG(t); | |
1324 | pim = up->channel_oil->pim; | |
1325 | ||
1326 | if (PIM_DEBUG_TRACE) { | |
1327 | char state_str[PIM_REG_STATE_STR_LEN]; | |
1328 | zlog_debug("%s: (S,G)=%s[%s] upstream register stop timer %s", | |
1329 | __PRETTY_FUNCTION__, up->sg_str, pim->vrf->name, | |
1330 | pim_reg_state2str(up->reg_state, state_str)); | |
1331 | } | |
1332 | ||
1333 | switch (up->reg_state) { | |
1334 | case PIM_REG_JOIN_PENDING: | |
1335 | up->reg_state = PIM_REG_JOIN; | |
1336 | pim_channel_add_oif(up->channel_oil, pim->regiface, | |
1337 | PIM_OIF_FLAG_PROTO_PIM); | |
1338 | break; | |
1339 | case PIM_REG_JOIN: | |
1340 | break; | |
1341 | case PIM_REG_PRUNE: | |
1342 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
1343 | if (!pim_ifp) { | |
1344 | if (PIM_DEBUG_TRACE) | |
1345 | zlog_debug( | |
1346 | "%s: Interface: %s is not configured for pim", | |
1347 | __PRETTY_FUNCTION__, | |
1348 | up->rpf.source_nexthop.interface->name); | |
1349 | return 0; | |
1350 | } | |
1351 | up->reg_state = PIM_REG_JOIN_PENDING; | |
1352 | pim_upstream_start_register_stop_timer(up, 1); | |
1353 | ||
1354 | if (((up->channel_oil->cc.lastused / 100) | |
1355 | > pim->keep_alive_time) | |
1356 | && (I_am_RP(pim_ifp->pim, up->sg.grp))) { | |
1357 | if (PIM_DEBUG_TRACE) | |
1358 | zlog_debug( | |
1359 | "%s: Stop sending the register, because I am the RP and we haven't seen a packet in a while", | |
1360 | __PRETTY_FUNCTION__); | |
1361 | return 0; | |
1362 | } | |
1363 | rpg = RP(pim_ifp->pim, up->sg.grp); | |
1364 | if (!rpg) { | |
1365 | if (PIM_DEBUG_TRACE) | |
1366 | zlog_debug( | |
1367 | "%s: Cannot send register for %s no RPF to the RP", | |
1368 | __PRETTY_FUNCTION__, up->sg_str); | |
1369 | return 0; | |
1370 | } | |
1371 | memset(&ip_hdr, 0, sizeof(struct ip)); | |
1372 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
1373 | ip_hdr.ip_hl = 5; | |
1374 | ip_hdr.ip_v = 4; | |
1375 | ip_hdr.ip_src = up->sg.src; | |
1376 | ip_hdr.ip_dst = up->sg.grp; | |
1377 | ip_hdr.ip_len = htons(20); | |
1378 | // checksum is broken | |
1379 | pim_register_send((uint8_t *)&ip_hdr, sizeof(struct ip), | |
1380 | pim_ifp->primary_address, rpg, 1, up); | |
1381 | break; | |
1382 | default: | |
1383 | break; | |
1384 | } | |
1385 | ||
1386 | return 0; | |
1387 | } | |
1388 | ||
1389 | void pim_upstream_start_register_stop_timer(struct pim_upstream *up, | |
1390 | int null_register) | |
1391 | { | |
1392 | uint32_t time; | |
1393 | ||
1394 | THREAD_TIMER_OFF(up->t_rs_timer); | |
1395 | ||
1396 | if (!null_register) { | |
1397 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1398 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1399 | time = lower + (random() % (upper - lower + 1)) | |
1400 | - PIM_REGISTER_PROBE_PERIOD; | |
1401 | } else | |
1402 | time = PIM_REGISTER_PROBE_PERIOD; | |
1403 | ||
1404 | if (PIM_DEBUG_TRACE) { | |
1405 | zlog_debug( | |
1406 | "%s: (S,G)=%s Starting upstream register stop timer %d", | |
1407 | __PRETTY_FUNCTION__, up->sg_str, time); | |
1408 | } | |
1409 | thread_add_timer(master, pim_upstream_register_stop_timer, up, time, | |
1410 | &up->t_rs_timer); | |
1411 | } | |
1412 | ||
1413 | int pim_upstream_inherited_olist_decide(struct pim_instance *pim, | |
1414 | struct pim_upstream *up) | |
1415 | { | |
1416 | struct interface *ifp; | |
1417 | struct pim_interface *pim_ifp = NULL; | |
1418 | struct pim_ifchannel *ch, *starch; | |
1419 | struct pim_upstream *starup = up->parent; | |
1420 | int output_intf = 0; | |
1421 | ||
1422 | if (up->rpf.source_nexthop.interface) | |
1423 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
1424 | else { | |
1425 | if (PIM_DEBUG_TRACE) | |
1426 | zlog_debug("%s: up %s RPF is not present", | |
1427 | __PRETTY_FUNCTION__, up->sg_str); | |
1428 | } | |
1429 | if (pim_ifp && !up->channel_oil) | |
1430 | up->channel_oil = pim_channel_oil_add( | |
1431 | pim, &up->sg, pim_ifp->mroute_vif_index); | |
1432 | ||
1433 | FOR_ALL_INTERFACES (pim->vrf, ifp) { | |
1434 | if (!ifp->info) | |
1435 | continue; | |
1436 | ||
1437 | ch = pim_ifchannel_find(ifp, &up->sg); | |
1438 | ||
1439 | if (starup) | |
1440 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
1441 | else | |
1442 | starch = NULL; | |
1443 | ||
1444 | if (!ch && !starch) | |
1445 | continue; | |
1446 | ||
1447 | if (pim_upstream_evaluate_join_desired_interface(up, ch, | |
1448 | starch)) { | |
1449 | int flag = PIM_OIF_FLAG_PROTO_PIM; | |
1450 | ||
1451 | if (!ch) | |
1452 | flag = PIM_OIF_FLAG_PROTO_STAR; | |
1453 | ||
1454 | pim_channel_add_oif(up->channel_oil, ifp, flag); | |
1455 | output_intf++; | |
1456 | } | |
1457 | } | |
1458 | ||
1459 | return output_intf; | |
1460 | } | |
1461 | ||
1462 | /* | |
1463 | * For a given upstream, determine the inherited_olist | |
1464 | * and apply it. | |
1465 | * | |
1466 | * inherited_olist(S,G,rpt) = | |
1467 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1468 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1469 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1470 | * | |
1471 | * inherited_olist(S,G) = | |
1472 | * inherited_olist(S,G,rpt) (+) | |
1473 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1474 | * | |
1475 | * return 1 if there are any output interfaces | |
1476 | * return 0 if there are not any output interfaces | |
1477 | */ | |
1478 | int pim_upstream_inherited_olist(struct pim_instance *pim, | |
1479 | struct pim_upstream *up) | |
1480 | { | |
1481 | int output_intf = pim_upstream_inherited_olist_decide(pim, up); | |
1482 | ||
1483 | /* | |
1484 | * If we have output_intf switch state to Join and work like normal | |
1485 | * If we don't have an output_intf that means we are probably a | |
1486 | * switch on a stick so turn on forwarding to just accept the | |
1487 | * incoming packets so we don't bother the other stuff! | |
1488 | */ | |
1489 | if (output_intf) | |
1490 | pim_upstream_switch(pim, up, PIM_UPSTREAM_JOINED); | |
1491 | else | |
1492 | forward_on(up); | |
1493 | ||
1494 | return output_intf; | |
1495 | } | |
1496 | ||
1497 | int pim_upstream_empty_inherited_olist(struct pim_upstream *up) | |
1498 | { | |
1499 | return pim_channel_oil_empty(up->channel_oil); | |
1500 | } | |
1501 | ||
1502 | /* | |
1503 | * When we have a new neighbor, | |
1504 | * find upstreams that don't have their rpf_addr | |
1505 | * set and see if the new neighbor allows | |
1506 | * the join to be sent | |
1507 | */ | |
1508 | void pim_upstream_find_new_rpf(struct pim_instance *pim) | |
1509 | { | |
1510 | struct listnode *up_node; | |
1511 | struct listnode *up_nextnode; | |
1512 | struct pim_upstream *up; | |
1513 | ||
1514 | /* | |
1515 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
1516 | */ | |
1517 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { | |
1518 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
1519 | if (PIM_DEBUG_TRACE) | |
1520 | zlog_debug( | |
1521 | "Upstream %s without a path to send join, checking", | |
1522 | up->sg_str); | |
1523 | pim_rpf_update(pim, up, NULL, 1); | |
1524 | } | |
1525 | } | |
1526 | } | |
1527 | ||
1528 | unsigned int pim_upstream_hash_key(void *arg) | |
1529 | { | |
1530 | struct pim_upstream *up = (struct pim_upstream *)arg; | |
1531 | ||
1532 | return jhash_2words(up->sg.src.s_addr, up->sg.grp.s_addr, 0); | |
1533 | } | |
1534 | ||
1535 | void pim_upstream_terminate(struct pim_instance *pim) | |
1536 | { | |
1537 | struct pim_upstream *up; | |
1538 | ||
1539 | if (pim->upstream_list) { | |
1540 | while (pim->upstream_list->count) { | |
1541 | up = listnode_head(pim->upstream_list); | |
1542 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); | |
1543 | } | |
1544 | ||
1545 | list_delete(&pim->upstream_list); | |
1546 | } | |
1547 | ||
1548 | if (pim->upstream_hash) | |
1549 | hash_free(pim->upstream_hash); | |
1550 | pim->upstream_hash = NULL; | |
1551 | ||
1552 | if (pim->upstream_sg_wheel) | |
1553 | wheel_delete(pim->upstream_sg_wheel); | |
1554 | pim->upstream_sg_wheel = NULL; | |
1555 | } | |
1556 | ||
1557 | bool pim_upstream_equal(const void *arg1, const void *arg2) | |
1558 | { | |
1559 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; | |
1560 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
1561 | ||
1562 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) | |
1563 | && (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
1564 | return true; | |
1565 | ||
1566 | return false; | |
1567 | } | |
1568 | ||
1569 | /* rfc4601:section-4.2:"Data Packet Forwarding Rules" defines | |
1570 | * the cases where kat has to be restarted on rxing traffic - | |
1571 | * | |
1572 | * if( DirectlyConnected(S) == TRUE AND iif == RPF_interface(S) ) { | |
1573 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1574 | * # Note: a register state transition or UpstreamJPState(S,G) | |
1575 | * # transition may happen as a result of restarting | |
1576 | * # KeepaliveTimer, and must be dealt with here. | |
1577 | * } | |
1578 | * if( iif == RPF_interface(S) AND UpstreamJPState(S,G) == Joined AND | |
1579 | * inherited_olist(S,G) != NULL ) { | |
1580 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1581 | * } | |
1582 | */ | |
1583 | static bool pim_upstream_kat_start_ok(struct pim_upstream *up) | |
1584 | { | |
1585 | struct pim_instance *pim = up->channel_oil->pim; | |
1586 | ||
1587 | /* "iif == RPF_interface(S)" check has to be done by the kernel or hw | |
1588 | * so we will skip that here */ | |
1589 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1590 | up->sg.src)) { | |
1591 | return true; | |
1592 | } | |
1593 | ||
1594 | if ((up->join_state == PIM_UPSTREAM_JOINED) | |
1595 | && !pim_upstream_empty_inherited_olist(up)) { | |
1596 | /* XXX: I have added this RP check just for 3.2 and it's a | |
1597 | * digression from | |
1598 | * what rfc-4601 says. Till now we were only running KAT on FHR | |
1599 | * and RP and | |
1600 | * there is some angst around making the change to run it all | |
1601 | * routers that | |
1602 | * maintain the (S, G) state. This is tracked via CM-13601 and | |
1603 | * MUST be | |
1604 | * removed to handle spt turn-arounds correctly in a 3-tier clos | |
1605 | */ | |
1606 | if (I_am_RP(pim, up->sg.grp)) | |
1607 | return true; | |
1608 | } | |
1609 | ||
1610 | return false; | |
1611 | } | |
1612 | ||
1613 | /* | |
1614 | * Code to check and see if we've received packets on a S,G mroute | |
1615 | * and if so to set the SPT bit appropriately | |
1616 | */ | |
1617 | static void pim_upstream_sg_running(void *arg) | |
1618 | { | |
1619 | struct pim_upstream *up = (struct pim_upstream *)arg; | |
1620 | struct pim_instance *pim = up->channel_oil->pim; | |
1621 | ||
1622 | // No packet can have arrived here if this is the case | |
1623 | if (!up->channel_oil->installed) { | |
1624 | if (PIM_DEBUG_TRACE) | |
1625 | zlog_debug("%s: %s[%s] is not installed in mroute", | |
1626 | __PRETTY_FUNCTION__, up->sg_str, | |
1627 | pim->vrf->name); | |
1628 | return; | |
1629 | } | |
1630 | ||
1631 | /* | |
1632 | * This is a bit of a hack | |
1633 | * We've noted that we should rescan but | |
1634 | * we've missed the window for doing so in | |
1635 | * pim_zebra.c for some reason. I am | |
1636 | * only doing this at this point in time | |
1637 | * to get us up and working for the moment | |
1638 | */ | |
1639 | if (up->channel_oil->oil_inherited_rescan) { | |
1640 | if (PIM_DEBUG_TRACE) | |
1641 | zlog_debug( | |
1642 | "%s: Handling unscanned inherited_olist for %s[%s]", | |
1643 | __PRETTY_FUNCTION__, up->sg_str, | |
1644 | pim->vrf->name); | |
1645 | pim_upstream_inherited_olist_decide(pim, up); | |
1646 | up->channel_oil->oil_inherited_rescan = 0; | |
1647 | } | |
1648 | pim_mroute_update_counters(up->channel_oil); | |
1649 | ||
1650 | // Have we seen packets? | |
1651 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) | |
1652 | && (up->channel_oil->cc.lastused / 100 > 30)) { | |
1653 | if (PIM_DEBUG_TRACE) { | |
1654 | zlog_debug( | |
1655 | "%s[%s]: %s old packet count is equal or lastused is greater than 30, (%ld,%ld,%lld)", | |
1656 | __PRETTY_FUNCTION__, up->sg_str, pim->vrf->name, | |
1657 | up->channel_oil->cc.oldpktcnt, | |
1658 | up->channel_oil->cc.pktcnt, | |
1659 | up->channel_oil->cc.lastused / 100); | |
1660 | } | |
1661 | return; | |
1662 | } | |
1663 | ||
1664 | if (pim_upstream_kat_start_ok(up)) { | |
1665 | /* Add a source reference to the stream if | |
1666 | * one doesn't already exist */ | |
1667 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
1668 | if (PIM_DEBUG_TRACE) | |
1669 | zlog_debug( | |
1670 | "source reference created on kat restart %s[%s]", | |
1671 | up->sg_str, pim->vrf->name); | |
1672 | ||
1673 | pim_upstream_ref(up, PIM_UPSTREAM_FLAG_MASK_SRC_STREAM, | |
1674 | __PRETTY_FUNCTION__); | |
1675 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); | |
1676 | pim_upstream_fhr_kat_start(up); | |
1677 | } | |
1678 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); | |
1679 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) | |
1680 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); | |
1681 | ||
1682 | if (up->sptbit != PIM_UPSTREAM_SPTBIT_TRUE) { | |
1683 | pim_upstream_set_sptbit(up, up->rpf.source_nexthop.interface); | |
1684 | } | |
1685 | return; | |
1686 | } | |
1687 | ||
1688 | void pim_upstream_add_lhr_star_pimreg(struct pim_instance *pim) | |
1689 | { | |
1690 | struct pim_upstream *up; | |
1691 | struct listnode *node; | |
1692 | ||
1693 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { | |
1694 | if (up->sg.src.s_addr != INADDR_ANY) | |
1695 | continue; | |
1696 | ||
1697 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) | |
1698 | continue; | |
1699 | ||
1700 | pim_channel_add_oif(up->channel_oil, pim->regiface, | |
1701 | PIM_OIF_FLAG_PROTO_IGMP); | |
1702 | } | |
1703 | } | |
1704 | ||
1705 | void pim_upstream_spt_prefix_list_update(struct pim_instance *pim, | |
1706 | struct prefix_list *pl) | |
1707 | { | |
1708 | const char *pname = prefix_list_name(pl); | |
1709 | ||
1710 | if (pim->spt.plist && strcmp(pim->spt.plist, pname) == 0) { | |
1711 | pim_upstream_remove_lhr_star_pimreg(pim, pname); | |
1712 | } | |
1713 | } | |
1714 | ||
1715 | /* | |
1716 | * nlist -> The new prefix list | |
1717 | * | |
1718 | * Per Group Application of pimreg to the OIL | |
1719 | * If the prefix list tells us DENY then | |
1720 | * we need to Switchover to SPT immediate | |
1721 | * so add the pimreg. | |
1722 | * If the prefix list tells us to ACCEPT than | |
1723 | * we need to Never do the SPT so remove | |
1724 | * the interface | |
1725 | * | |
1726 | */ | |
1727 | void pim_upstream_remove_lhr_star_pimreg(struct pim_instance *pim, | |
1728 | const char *nlist) | |
1729 | { | |
1730 | struct pim_upstream *up; | |
1731 | struct listnode *node; | |
1732 | struct prefix_list *np; | |
1733 | struct prefix g; | |
1734 | enum prefix_list_type apply_new; | |
1735 | ||
1736 | np = prefix_list_lookup(AFI_IP, nlist); | |
1737 | ||
1738 | g.family = AF_INET; | |
1739 | g.prefixlen = IPV4_MAX_PREFIXLEN; | |
1740 | ||
1741 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { | |
1742 | if (up->sg.src.s_addr != INADDR_ANY) | |
1743 | continue; | |
1744 | ||
1745 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) | |
1746 | continue; | |
1747 | ||
1748 | if (!nlist) { | |
1749 | pim_channel_del_oif(up->channel_oil, pim->regiface, | |
1750 | PIM_OIF_FLAG_PROTO_IGMP); | |
1751 | continue; | |
1752 | } | |
1753 | g.u.prefix4 = up->sg.grp; | |
1754 | apply_new = prefix_list_apply(np, &g); | |
1755 | if (apply_new == PREFIX_DENY) | |
1756 | pim_channel_add_oif(up->channel_oil, pim->regiface, | |
1757 | PIM_OIF_FLAG_PROTO_IGMP); | |
1758 | else | |
1759 | pim_channel_del_oif(up->channel_oil, pim->regiface, | |
1760 | PIM_OIF_FLAG_PROTO_IGMP); | |
1761 | } | |
1762 | } | |
1763 | ||
1764 | void pim_upstream_init(struct pim_instance *pim) | |
1765 | { | |
1766 | char name[64]; | |
1767 | ||
1768 | snprintf(name, 64, "PIM %s Timer Wheel", | |
1769 | pim->vrf->name); | |
1770 | pim->upstream_sg_wheel = | |
1771 | wheel_init(master, 31000, 100, pim_upstream_hash_key, | |
1772 | pim_upstream_sg_running, name); | |
1773 | ||
1774 | snprintf(name, 64, "PIM %s Upstream Hash", | |
1775 | pim->vrf->name); | |
1776 | pim->upstream_hash = hash_create_size(8192, pim_upstream_hash_key, | |
1777 | pim_upstream_equal, name); | |
1778 | ||
1779 | pim->upstream_list = list_new(); | |
1780 | pim->upstream_list->cmp = pim_upstream_compare; | |
1781 | } |