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12e41d03 DL |
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 | |
16 | along with this program; see the file COPYING; if not, write to the | |
17 | Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, | |
18 | MA 02110-1301 USA | |
12e41d03 DL |
19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #include "zebra/rib.h" | |
24 | ||
25 | #include "log.h" | |
26 | #include "zclient.h" | |
27 | #include "memory.h" | |
28 | #include "thread.h" | |
29 | #include "linklist.h" | |
30 | ||
31 | #include "pimd.h" | |
32 | #include "pim_pim.h" | |
33 | #include "pim_str.h" | |
34 | #include "pim_time.h" | |
35 | #include "pim_iface.h" | |
36 | #include "pim_join.h" | |
37 | #include "pim_zlookup.h" | |
38 | #include "pim_upstream.h" | |
39 | #include "pim_ifchannel.h" | |
40 | #include "pim_neighbor.h" | |
41 | #include "pim_rpf.h" | |
42 | #include "pim_zebra.h" | |
43 | #include "pim_oil.h" | |
44 | #include "pim_macro.h" | |
8f5f5e91 | 45 | #include "pim_rp.h" |
f14248dd | 46 | #include "pim_br.h" |
12e41d03 DL |
47 | |
48 | static void join_timer_start(struct pim_upstream *up); | |
49 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); | |
50 | ||
51 | void pim_upstream_free(struct pim_upstream *up) | |
52 | { | |
53 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
54 | } | |
55 | ||
56 | static void upstream_channel_oil_detach(struct pim_upstream *up) | |
57 | { | |
58 | if (up->channel_oil) { | |
59 | pim_channel_oil_del(up->channel_oil); | |
25a335e0 | 60 | up->channel_oil = NULL; |
12e41d03 DL |
61 | } |
62 | } | |
63 | ||
64 | void pim_upstream_delete(struct pim_upstream *up) | |
65 | { | |
66 | THREAD_OFF(up->t_join_timer); | |
f14248dd | 67 | THREAD_OFF(up->t_ka_timer); |
12e41d03 DL |
68 | |
69 | upstream_channel_oil_detach(up); | |
70 | ||
71 | /* | |
72 | notice that listnode_delete() can't be moved | |
73 | into pim_upstream_free() because the later is | |
74 | called by list_delete_all_node() | |
75 | */ | |
76 | listnode_delete(qpim_upstream_list, up); | |
77 | ||
78 | pim_upstream_free(up); | |
79 | } | |
80 | ||
81 | static void send_join(struct pim_upstream *up) | |
82 | { | |
83 | zassert(up->join_state == PIM_UPSTREAM_JOINED); | |
84 | ||
85 | ||
86 | if (PIM_DEBUG_PIM_TRACE) { | |
87 | if (PIM_INADDR_IS_ANY(up->rpf.rpf_addr)) { | |
88 | char src_str[100]; | |
89 | char grp_str[100]; | |
90 | char rpf_str[100]; | |
91 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
92 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
93 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr, rpf_str, sizeof(rpf_str)); | |
94 | zlog_warn("%s: can't send join upstream: RPF'(%s,%s)=%s", | |
95 | __PRETTY_FUNCTION__, | |
96 | src_str, grp_str, rpf_str); | |
97 | /* warning only */ | |
98 | } | |
99 | } | |
100 | ||
101 | /* send Join(S,G) to the current upstream neighbor */ | |
102 | pim_joinprune_send(up->rpf.source_nexthop.interface, | |
103 | up->rpf.rpf_addr, | |
104 | up->source_addr, | |
105 | up->group_addr, | |
106 | 1 /* join */); | |
107 | } | |
108 | ||
109 | static int on_join_timer(struct thread *t) | |
110 | { | |
111 | struct pim_upstream *up; | |
112 | ||
113 | zassert(t); | |
114 | up = THREAD_ARG(t); | |
115 | zassert(up); | |
116 | ||
117 | send_join(up); | |
118 | ||
4a4c4a07 | 119 | up->t_join_timer = NULL; |
12e41d03 DL |
120 | join_timer_start(up); |
121 | ||
122 | return 0; | |
123 | } | |
124 | ||
125 | static void join_timer_start(struct pim_upstream *up) | |
126 | { | |
127 | if (PIM_DEBUG_PIM_EVENTS) { | |
128 | char src_str[100]; | |
129 | char grp_str[100]; | |
130 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
131 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
132 | zlog_debug("%s: starting %d sec timer for upstream (S,G)=(%s,%s)", | |
133 | __PRETTY_FUNCTION__, | |
134 | qpim_t_periodic, | |
135 | src_str, grp_str); | |
136 | } | |
137 | ||
138 | zassert(!up->t_join_timer); | |
139 | ||
140 | THREAD_TIMER_ON(master, up->t_join_timer, | |
141 | on_join_timer, | |
142 | up, qpim_t_periodic); | |
143 | } | |
144 | ||
145 | void pim_upstream_join_timer_restart(struct pim_upstream *up) | |
146 | { | |
147 | THREAD_OFF(up->t_join_timer); | |
148 | join_timer_start(up); | |
149 | } | |
150 | ||
151 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
152 | int interval_msec) | |
153 | { | |
154 | if (PIM_DEBUG_PIM_EVENTS) { | |
155 | char src_str[100]; | |
156 | char grp_str[100]; | |
157 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
158 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
159 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=(%s,%s)", | |
160 | __PRETTY_FUNCTION__, | |
161 | interval_msec, | |
162 | src_str, grp_str); | |
163 | } | |
164 | ||
165 | THREAD_OFF(up->t_join_timer); | |
166 | THREAD_TIMER_MSEC_ON(master, up->t_join_timer, | |
167 | on_join_timer, | |
168 | up, interval_msec); | |
169 | } | |
170 | ||
171 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
172 | struct in_addr rpf_addr, | |
173 | int holdtime) | |
174 | { | |
175 | long t_joinsuppress_msec; | |
176 | long join_timer_remain_msec; | |
177 | ||
178 | t_joinsuppress_msec = MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
179 | 1000 * holdtime); | |
180 | ||
181 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
182 | ||
183 | if (PIM_DEBUG_PIM_TRACE) { | |
184 | char src_str[100]; | |
185 | char grp_str[100]; | |
186 | char rpf_str[100]; | |
187 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
188 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
189 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); | |
190 | zlog_debug("%s %s: detected Join(%s,%s) to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", | |
191 | __FILE__, __PRETTY_FUNCTION__, | |
192 | src_str, grp_str, | |
193 | rpf_str, | |
194 | join_timer_remain_msec, t_joinsuppress_msec); | |
195 | } | |
196 | ||
197 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
198 | if (PIM_DEBUG_PIM_TRACE) { | |
199 | char src_str[100]; | |
200 | char grp_str[100]; | |
201 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
202 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
203 | zlog_debug("%s %s: suppressing Join(S,G)=(%s,%s) for %ld msec", | |
204 | __FILE__, __PRETTY_FUNCTION__, | |
205 | src_str, grp_str, t_joinsuppress_msec); | |
206 | } | |
207 | ||
208 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
209 | } | |
210 | } | |
211 | ||
212 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
213 | struct pim_upstream *up, | |
214 | struct in_addr rpf_addr) | |
215 | { | |
216 | long join_timer_remain_msec; | |
217 | int t_override_msec; | |
218 | ||
219 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
220 | t_override_msec = pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
221 | ||
222 | if (PIM_DEBUG_PIM_TRACE) { | |
223 | char src_str[100]; | |
224 | char grp_str[100]; | |
225 | char rpf_str[100]; | |
226 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
227 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
228 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); | |
229 | zlog_debug("%s: to RPF'(%s,%s)=%s: join_timer=%ld msec t_override=%d msec", | |
230 | debug_label, | |
231 | src_str, grp_str, rpf_str, | |
232 | join_timer_remain_msec, t_override_msec); | |
233 | } | |
234 | ||
235 | if (join_timer_remain_msec > t_override_msec) { | |
236 | if (PIM_DEBUG_PIM_TRACE) { | |
237 | char src_str[100]; | |
238 | char grp_str[100]; | |
239 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
240 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
241 | zlog_debug("%s: decreasing (S,G)=(%s,%s) join timer to t_override=%d msec", | |
242 | debug_label, | |
243 | src_str, grp_str, | |
244 | t_override_msec); | |
245 | } | |
246 | ||
247 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
248 | } | |
249 | } | |
250 | ||
251 | static void forward_on(struct pim_upstream *up) | |
252 | { | |
253 | struct listnode *ifnode; | |
254 | struct listnode *ifnextnode; | |
255 | struct listnode *chnode; | |
256 | struct listnode *chnextnode; | |
257 | struct interface *ifp; | |
258 | struct pim_interface *pim_ifp; | |
259 | struct pim_ifchannel *ch; | |
260 | ||
261 | /* scan all interfaces */ | |
469351b3 | 262 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
263 | pim_ifp = ifp->info; |
264 | if (!pim_ifp) | |
265 | continue; | |
266 | ||
267 | /* scan per-interface (S,G) state */ | |
268 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
269 | ||
270 | if (ch->upstream != up) | |
271 | continue; | |
272 | ||
273 | if (pim_macro_chisin_oiflist(ch)) | |
274 | pim_forward_start(ch); | |
275 | ||
276 | } /* scan iface channel list */ | |
277 | } /* scan iflist */ | |
278 | } | |
279 | ||
280 | static void forward_off(struct pim_upstream *up) | |
281 | { | |
282 | struct listnode *ifnode; | |
283 | struct listnode *ifnextnode; | |
284 | struct listnode *chnode; | |
285 | struct listnode *chnextnode; | |
286 | struct interface *ifp; | |
287 | struct pim_interface *pim_ifp; | |
288 | struct pim_ifchannel *ch; | |
289 | ||
290 | /* scan all interfaces */ | |
469351b3 | 291 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
292 | pim_ifp = ifp->info; |
293 | if (!pim_ifp) | |
294 | continue; | |
295 | ||
296 | /* scan per-interface (S,G) state */ | |
297 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
298 | ||
299 | if (ch->upstream != up) | |
300 | continue; | |
301 | ||
302 | pim_forward_stop(ch); | |
303 | ||
304 | } /* scan iface channel list */ | |
305 | } /* scan iflist */ | |
306 | } | |
307 | ||
308 | static void pim_upstream_switch(struct pim_upstream *up, | |
309 | enum pim_upstream_state new_state) | |
310 | { | |
311 | enum pim_upstream_state old_state = up->join_state; | |
312 | ||
313 | zassert(old_state != new_state); | |
314 | ||
315 | up->join_state = new_state; | |
316 | up->state_transition = pim_time_monotonic_sec(); | |
317 | ||
318 | if (PIM_DEBUG_PIM_EVENTS) { | |
319 | char src_str[100]; | |
320 | char grp_str[100]; | |
321 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
322 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
323 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G)=(%s,%s)", | |
324 | __PRETTY_FUNCTION__, | |
325 | ((new_state == PIM_UPSTREAM_JOINED) ? "JOINED" : "NOTJOINED"), | |
326 | src_str, grp_str); | |
327 | } | |
328 | ||
329 | pim_upstream_update_assert_tracking_desired(up); | |
330 | ||
331 | if (new_state == PIM_UPSTREAM_JOINED) { | |
332 | forward_on(up); | |
333 | send_join(up); | |
334 | join_timer_start(up); | |
335 | } | |
336 | else { | |
337 | forward_off(up); | |
338 | pim_joinprune_send(up->rpf.source_nexthop.interface, | |
339 | up->rpf.rpf_addr, | |
340 | up->source_addr, | |
341 | up->group_addr, | |
342 | 0 /* prune */); | |
343 | zassert(up->t_join_timer); | |
344 | THREAD_OFF(up->t_join_timer); | |
345 | } | |
346 | ||
347 | } | |
348 | ||
8f5f5e91 | 349 | |
12e41d03 | 350 | static struct pim_upstream *pim_upstream_new(struct in_addr source_addr, |
651d0f71 DS |
351 | struct in_addr group_addr, |
352 | struct interface *incoming) | |
12e41d03 DL |
353 | { |
354 | struct pim_upstream *up; | |
2f702571 | 355 | enum pim_rpf_result rpf_result; |
12e41d03 DL |
356 | |
357 | up = XMALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); | |
358 | if (!up) { | |
359 | zlog_err("%s: PIM XMALLOC(%zu) failure", | |
360 | __PRETTY_FUNCTION__, sizeof(*up)); | |
8f5f5e91 | 361 | return NULL; |
12e41d03 DL |
362 | } |
363 | ||
364 | up->source_addr = source_addr; | |
8f5f5e91 DS |
365 | if (!pim_rp_set_upstream_addr (&up->upstream_addr, source_addr)) |
366 | { | |
367 | if (PIM_DEBUG_PIM_TRACE) | |
368 | zlog_debug("%s: Received a (*,G) with no RP configured", __PRETTY_FUNCTION__); | |
369 | ||
370 | XFREE (MTYPE_PIM_UPSTREAM, up); | |
371 | return NULL; | |
372 | } | |
373 | ||
12e41d03 DL |
374 | up->group_addr = group_addr; |
375 | up->flags = 0; | |
376 | up->ref_count = 1; | |
4a4c4a07 DS |
377 | up->t_join_timer = NULL; |
378 | up->t_ka_timer = NULL; | |
12e41d03 DL |
379 | up->join_state = 0; |
380 | up->state_transition = pim_time_monotonic_sec(); | |
4a4c4a07 | 381 | up->channel_oil = NULL; |
f9e0ab5b | 382 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; |
12e41d03 DL |
383 | |
384 | up->rpf.source_nexthop.interface = 0; | |
385 | up->rpf.source_nexthop.mrib_nexthop_addr.s_addr = PIM_NET_INADDR_ANY; | |
386 | up->rpf.source_nexthop.mrib_metric_preference = qpim_infinite_assert_metric.metric_preference; | |
387 | up->rpf.source_nexthop.mrib_route_metric = qpim_infinite_assert_metric.route_metric; | |
388 | up->rpf.rpf_addr.s_addr = PIM_NET_INADDR_ANY; | |
389 | ||
651d0f71 | 390 | rpf_result = pim_rpf_update(up, 0, incoming); |
2f702571 DS |
391 | if (rpf_result == PIM_RPF_FAILURE) { |
392 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
393 | return NULL; | |
394 | } | |
12e41d03 DL |
395 | |
396 | listnode_add(qpim_upstream_list, up); | |
397 | ||
398 | return up; | |
399 | } | |
400 | ||
401 | struct pim_upstream *pim_upstream_find(struct in_addr source_addr, | |
402 | struct in_addr group_addr) | |
403 | { | |
404 | struct listnode *up_node; | |
405 | struct pim_upstream *up; | |
406 | ||
407 | for (ALL_LIST_ELEMENTS_RO(qpim_upstream_list, up_node, up)) { | |
d8cd119b DS |
408 | if (group_addr.s_addr == up->group_addr.s_addr) { |
409 | if ((up->source_addr.s_addr == INADDR_ANY) || | |
410 | (source_addr.s_addr == up->source_addr.s_addr)) { | |
411 | return up; | |
412 | } | |
12e41d03 DL |
413 | } |
414 | } | |
415 | ||
416 | return 0; | |
417 | } | |
418 | ||
419 | struct pim_upstream *pim_upstream_add(struct in_addr source_addr, | |
651d0f71 DS |
420 | struct in_addr group_addr, |
421 | struct interface *incoming) | |
12e41d03 DL |
422 | { |
423 | struct pim_upstream *up; | |
424 | ||
425 | up = pim_upstream_find(source_addr, group_addr); | |
426 | if (up) { | |
427 | ++up->ref_count; | |
428 | } | |
429 | else { | |
651d0f71 | 430 | up = pim_upstream_new(source_addr, group_addr, incoming); |
12e41d03 DL |
431 | } |
432 | ||
433 | return up; | |
434 | } | |
435 | ||
436 | void pim_upstream_del(struct pim_upstream *up) | |
437 | { | |
438 | --up->ref_count; | |
439 | ||
440 | if (up->ref_count < 1) { | |
441 | pim_upstream_delete(up); | |
442 | } | |
443 | } | |
444 | ||
445 | /* | |
446 | Evaluate JoinDesired(S,G): | |
447 | ||
448 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
449 | in the set: | |
450 | ||
451 | inherited_olist(S,G) = | |
452 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
453 | ||
454 | JoinDesired(S,G) may be affected by changes in the following: | |
455 | ||
456 | pim_ifp->primary_address | |
457 | pim_ifp->pim_dr_addr | |
458 | ch->ifassert_winner_metric | |
459 | ch->ifassert_winner | |
460 | ch->local_ifmembership | |
461 | ch->ifjoin_state | |
462 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
463 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
464 | ch->upstream->rpf.source_nexthop.interface | |
465 | ||
466 | See also pim_upstream_update_join_desired() below. | |
467 | */ | |
468 | int pim_upstream_evaluate_join_desired(struct pim_upstream *up) | |
469 | { | |
470 | struct listnode *ifnode; | |
471 | struct listnode *ifnextnode; | |
472 | struct listnode *chnode; | |
473 | struct listnode *chnextnode; | |
474 | struct interface *ifp; | |
475 | struct pim_interface *pim_ifp; | |
476 | struct pim_ifchannel *ch; | |
477 | ||
478 | /* scan all interfaces */ | |
469351b3 | 479 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
480 | pim_ifp = ifp->info; |
481 | if (!pim_ifp) | |
482 | continue; | |
483 | ||
484 | /* scan per-interface (S,G) state */ | |
485 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
486 | if (ch->upstream != up) | |
487 | continue; | |
488 | ||
489 | if (pim_macro_ch_lost_assert(ch)) | |
490 | continue; /* keep searching */ | |
491 | ||
492 | if (pim_macro_chisin_joins_or_include(ch)) | |
493 | return 1; /* true */ | |
494 | } /* scan iface channel list */ | |
495 | } /* scan iflist */ | |
496 | ||
497 | return 0; /* false */ | |
498 | } | |
499 | ||
500 | /* | |
501 | See also pim_upstream_evaluate_join_desired() above. | |
502 | */ | |
503 | void pim_upstream_update_join_desired(struct pim_upstream *up) | |
504 | { | |
505 | int was_join_desired; /* boolean */ | |
506 | int is_join_desired; /* boolean */ | |
507 | ||
508 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
509 | ||
510 | is_join_desired = pim_upstream_evaluate_join_desired(up); | |
511 | if (is_join_desired) | |
512 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
513 | else | |
514 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
515 | ||
516 | /* switched from false to true */ | |
517 | if (is_join_desired && !was_join_desired) { | |
518 | zassert(up->join_state == PIM_UPSTREAM_NOTJOINED); | |
519 | pim_upstream_switch(up, PIM_UPSTREAM_JOINED); | |
520 | return; | |
521 | } | |
522 | ||
523 | /* switched from true to false */ | |
524 | if (!is_join_desired && was_join_desired) { | |
525 | zassert(up->join_state == PIM_UPSTREAM_JOINED); | |
526 | pim_upstream_switch(up, PIM_UPSTREAM_NOTJOINED); | |
527 | return; | |
528 | } | |
529 | } | |
530 | ||
531 | /* | |
532 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
533 | Transitions from Joined State | |
534 | RPF'(S,G) GenID changes | |
535 | ||
536 | The upstream (S,G) state machine remains in Joined state. If the | |
537 | Join Timer is set to expire in more than t_override seconds, reset | |
538 | it so that it expires after t_override seconds. | |
539 | */ | |
540 | void pim_upstream_rpf_genid_changed(struct in_addr neigh_addr) | |
541 | { | |
542 | struct listnode *up_node; | |
543 | struct listnode *up_nextnode; | |
544 | struct pim_upstream *up; | |
545 | ||
546 | /* | |
547 | Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
548 | */ | |
549 | for (ALL_LIST_ELEMENTS(qpim_upstream_list, up_node, up_nextnode, up)) { | |
550 | ||
551 | if (PIM_DEBUG_PIM_TRACE) { | |
552 | char neigh_str[100]; | |
553 | char src_str[100]; | |
554 | char grp_str[100]; | |
555 | char rpf_addr_str[100]; | |
556 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, sizeof(neigh_str)); | |
557 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
558 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
559 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr, rpf_addr_str, sizeof(rpf_addr_str)); | |
560 | zlog_debug("%s: matching neigh=%s against upstream (S,G)=(%s,%s) joined=%d rpf_addr=%s", | |
561 | __PRETTY_FUNCTION__, | |
562 | neigh_str, src_str, grp_str, | |
563 | up->join_state == PIM_UPSTREAM_JOINED, | |
564 | rpf_addr_str); | |
565 | } | |
566 | ||
567 | /* consider only (S,G) upstream in Joined state */ | |
568 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
569 | continue; | |
570 | ||
571 | /* match RPF'(S,G)=neigh_addr */ | |
572 | if (up->rpf.rpf_addr.s_addr != neigh_addr.s_addr) | |
573 | continue; | |
574 | ||
575 | pim_upstream_join_timer_decrease_to_t_override("RPF'(S,G) GenID change", | |
576 | up, neigh_addr); | |
577 | } | |
578 | } | |
579 | ||
580 | ||
581 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
582 | struct interface *old_rpf_ifp) | |
583 | { | |
584 | struct listnode *ifnode; | |
585 | struct listnode *ifnextnode; | |
586 | struct interface *ifp; | |
587 | ||
588 | /* scan all interfaces */ | |
469351b3 | 589 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
590 | struct listnode *chnode; |
591 | struct listnode *chnextnode; | |
592 | struct pim_ifchannel *ch; | |
593 | struct pim_interface *pim_ifp; | |
594 | ||
595 | pim_ifp = ifp->info; | |
596 | if (!pim_ifp) | |
597 | continue; | |
598 | ||
599 | /* search all ifchannels */ | |
600 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
601 | if (ch->upstream != up) | |
602 | continue; | |
603 | ||
604 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
605 | if ( | |
606 | /* RPF_interface(S) was NOT I */ | |
607 | (old_rpf_ifp == ch->interface) | |
608 | && | |
609 | /* RPF_interface(S) stopped being I */ | |
610 | (ch->upstream->rpf.source_nexthop.interface != ch->interface) | |
611 | ) { | |
612 | assert_action_a5(ch); | |
613 | } | |
614 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
615 | ||
616 | pim_ifchannel_update_assert_tracking_desired(ch); | |
617 | } | |
618 | } | |
619 | } | |
620 | ||
621 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
622 | { | |
623 | struct listnode *ifnode; | |
624 | struct listnode *ifnextnode; | |
625 | struct listnode *chnode; | |
626 | struct listnode *chnextnode; | |
627 | struct interface *ifp; | |
628 | struct pim_interface *pim_ifp; | |
629 | struct pim_ifchannel *ch; | |
630 | ||
631 | /* scan all interfaces */ | |
469351b3 | 632 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
633 | pim_ifp = ifp->info; |
634 | if (!pim_ifp) | |
635 | continue; | |
636 | ||
637 | /* scan per-interface (S,G) state */ | |
638 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
639 | ||
640 | if (ch->upstream != up) | |
641 | continue; | |
642 | ||
643 | pim_ifchannel_update_could_assert(ch); | |
644 | ||
645 | } /* scan iface channel list */ | |
646 | } /* scan iflist */ | |
647 | } | |
648 | ||
649 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
650 | { | |
651 | struct listnode *ifnode; | |
652 | struct listnode *ifnextnode; | |
653 | struct listnode *chnode; | |
654 | struct listnode *chnextnode; | |
655 | struct interface *ifp; | |
656 | struct pim_interface *pim_ifp; | |
657 | struct pim_ifchannel *ch; | |
658 | ||
659 | /* scan all interfaces */ | |
469351b3 | 660 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
661 | pim_ifp = ifp->info; |
662 | if (!pim_ifp) | |
663 | continue; | |
664 | ||
665 | /* scan per-interface (S,G) state */ | |
666 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
667 | ||
668 | if (ch->upstream != up) | |
669 | continue; | |
670 | ||
671 | pim_ifchannel_update_my_assert_metric(ch); | |
672 | ||
673 | } /* scan iface channel list */ | |
674 | } /* scan iflist */ | |
675 | } | |
676 | ||
677 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
678 | { | |
679 | struct listnode *ifnode; | |
680 | struct listnode *ifnextnode; | |
681 | struct listnode *chnode; | |
682 | struct listnode *chnextnode; | |
683 | struct interface *ifp; | |
684 | struct pim_interface *pim_ifp; | |
685 | struct pim_ifchannel *ch; | |
686 | ||
687 | /* scan all interfaces */ | |
469351b3 | 688 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
689 | pim_ifp = ifp->info; |
690 | if (!pim_ifp) | |
691 | continue; | |
692 | ||
693 | /* scan per-interface (S,G) state */ | |
694 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
695 | ||
696 | if (ch->upstream != up) | |
697 | continue; | |
698 | ||
699 | pim_ifchannel_update_assert_tracking_desired(ch); | |
700 | ||
701 | } /* scan iface channel list */ | |
702 | } /* scan iflist */ | |
703 | } | |
f14248dd DS |
704 | |
705 | /* | |
706 | * On an RP, the PMBR value must be cleared when the | |
707 | * Keepalive Timer expires | |
708 | */ | |
709 | static int | |
710 | pim_upstream_keep_alive_timer (struct thread *t) | |
711 | { | |
712 | struct pim_upstream *up; | |
713 | ||
714 | up = THREAD_ARG(t); | |
715 | ||
25a335e0 DS |
716 | if (I_am_RP (up->group_addr)) |
717 | { | |
718 | pim_br_clear_pmbr (up->source_addr, up->group_addr); | |
719 | /* | |
720 | * We need to do more here :) | |
721 | * But this is the start. | |
722 | */ | |
723 | } | |
724 | else | |
725 | { | |
726 | pim_mroute_update_counters (up->channel_oil); | |
f14248dd | 727 | |
25a335e0 DS |
728 | if (up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) |
729 | { | |
730 | pim_mroute_del (up->channel_oil); | |
731 | pim_upstream_delete (up); | |
732 | } | |
733 | else | |
734 | { | |
735 | up->t_ka_timer = NULL; | |
736 | pim_upstream_keep_alive_timer_start (up, PIM_KEEPALIVE_PERIOD); | |
737 | } | |
738 | } | |
cb40b272 | 739 | return 1; |
f14248dd DS |
740 | } |
741 | ||
f14248dd DS |
742 | void |
743 | pim_upstream_keep_alive_timer_start (struct pim_upstream *up, | |
744 | uint32_t time) | |
745 | { | |
746 | THREAD_TIMER_ON (master, | |
747 | up->t_ka_timer, | |
748 | pim_upstream_keep_alive_timer, | |
749 | up, time); | |
750 | } | |
cb40b272 DS |
751 | |
752 | /* | |
753 | * 4.2.1 Last-Hop Switchover to the SPT | |
754 | * | |
755 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
756 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
757 | * router, it has the option of switching to receive the traffic on a | |
758 | * shortest path tree (SPT). | |
759 | * | |
760 | * The decision for a router to switch to the SPT is controlled as | |
761 | * follows: | |
762 | * | |
763 | * void | |
764 | * CheckSwitchToSpt(S,G) { | |
765 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
766 | * (+) pim_include(S,G) != NULL ) | |
767 | * AND SwitchToSptDesired(S,G) ) { | |
768 | * # Note: Restarting the KAT will result in the SPT switch | |
769 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
770 | * } | |
771 | * } | |
772 | * | |
773 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
774 | * defined. An "infinite threshold" policy can be implemented by making | |
775 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
776 | * first packet" policy can be implemented by making | |
777 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
778 | * received for the source and group. | |
779 | */ | |
780 | int | |
781 | pim_upstream_switch_to_spt_desired (struct in_addr source, struct in_addr group) | |
782 | { | |
783 | return 0; | |
784 | } |