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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 | |
19 | ||
20 | $QuaggaId: $Format:%an, %ai, %h$ $ | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
24 | ||
25 | #include "zebra/rib.h" | |
26 | ||
27 | #include "log.h" | |
28 | #include "zclient.h" | |
29 | #include "memory.h" | |
30 | #include "thread.h" | |
31 | #include "linklist.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" | |
8f5f5e91 | 47 | #include "pim_rp.h" |
f14248dd | 48 | #include "pim_br.h" |
627ed2a3 | 49 | #include "pim_register.h" |
12e41d03 DL |
50 | |
51 | static void join_timer_start(struct pim_upstream *up); | |
52 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); | |
53 | ||
54 | void pim_upstream_free(struct pim_upstream *up) | |
55 | { | |
56 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
57 | } | |
58 | ||
59 | static void upstream_channel_oil_detach(struct pim_upstream *up) | |
60 | { | |
61 | if (up->channel_oil) { | |
62 | pim_channel_oil_del(up->channel_oil); | |
25a335e0 | 63 | up->channel_oil = NULL; |
12e41d03 DL |
64 | } |
65 | } | |
66 | ||
67 | void pim_upstream_delete(struct pim_upstream *up) | |
68 | { | |
69 | THREAD_OFF(up->t_join_timer); | |
f14248dd | 70 | THREAD_OFF(up->t_ka_timer); |
792f4d29 | 71 | THREAD_OFF(up->t_rs_timer); |
12e41d03 DL |
72 | |
73 | upstream_channel_oil_detach(up); | |
74 | ||
75 | /* | |
76 | notice that listnode_delete() can't be moved | |
77 | into pim_upstream_free() because the later is | |
78 | called by list_delete_all_node() | |
79 | */ | |
80 | listnode_delete(qpim_upstream_list, up); | |
81 | ||
82 | pim_upstream_free(up); | |
83 | } | |
84 | ||
56638739 DS |
85 | void |
86 | pim_upstream_send_join (struct pim_upstream *up) | |
12e41d03 | 87 | { |
12e41d03 | 88 | if (PIM_DEBUG_PIM_TRACE) { |
56638739 DS |
89 | char src_str[100]; |
90 | char grp_str[100]; | |
91 | char rpf_str[100]; | |
92 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
93 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
94 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr, rpf_str, sizeof(rpf_str)); | |
95 | zlog_debug ("%s: RPF'(%s,%s)=%s(%s) for Interface %s", __PRETTY_FUNCTION__, | |
96 | src_str, grp_str, rpf_str, pim_upstream_state2str (up), | |
97 | up->rpf.source_nexthop.interface->name); | |
12e41d03 | 98 | if (PIM_INADDR_IS_ANY(up->rpf.rpf_addr)) { |
56638739 DS |
99 | zlog_debug("%s: can't send join upstream: RPF'(%s,%s)=%s", |
100 | __PRETTY_FUNCTION__, | |
101 | src_str, grp_str, rpf_str); | |
12e41d03 DL |
102 | /* warning only */ |
103 | } | |
104 | } | |
56638739 DS |
105 | |
106 | /* | |
107 | * In the case of a FHR we will not have anyone to send this to. | |
108 | */ | |
109 | if (up->fhr) | |
110 | return; | |
111 | ||
112 | zassert(up->join_state == PIM_UPSTREAM_JOINED); | |
12e41d03 DL |
113 | |
114 | /* send Join(S,G) to the current upstream neighbor */ | |
115 | pim_joinprune_send(up->rpf.source_nexthop.interface, | |
116 | up->rpf.rpf_addr, | |
117 | up->source_addr, | |
118 | up->group_addr, | |
119 | 1 /* join */); | |
120 | } | |
121 | ||
122 | static int on_join_timer(struct thread *t) | |
123 | { | |
124 | struct pim_upstream *up; | |
125 | ||
126 | zassert(t); | |
127 | up = THREAD_ARG(t); | |
128 | zassert(up); | |
129 | ||
56638739 | 130 | pim_upstream_send_join (up); |
12e41d03 | 131 | |
4a4c4a07 | 132 | up->t_join_timer = NULL; |
12e41d03 DL |
133 | join_timer_start(up); |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
138 | static void join_timer_start(struct pim_upstream *up) | |
139 | { | |
140 | if (PIM_DEBUG_PIM_EVENTS) { | |
141 | char src_str[100]; | |
142 | char grp_str[100]; | |
143 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
144 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
145 | zlog_debug("%s: starting %d sec timer for upstream (S,G)=(%s,%s)", | |
146 | __PRETTY_FUNCTION__, | |
147 | qpim_t_periodic, | |
148 | src_str, grp_str); | |
149 | } | |
150 | ||
151 | zassert(!up->t_join_timer); | |
152 | ||
153 | THREAD_TIMER_ON(master, up->t_join_timer, | |
154 | on_join_timer, | |
155 | up, qpim_t_periodic); | |
156 | } | |
157 | ||
158 | void pim_upstream_join_timer_restart(struct pim_upstream *up) | |
159 | { | |
160 | THREAD_OFF(up->t_join_timer); | |
161 | join_timer_start(up); | |
162 | } | |
163 | ||
164 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
165 | int interval_msec) | |
166 | { | |
167 | if (PIM_DEBUG_PIM_EVENTS) { | |
168 | char src_str[100]; | |
169 | char grp_str[100]; | |
170 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
171 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
172 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=(%s,%s)", | |
173 | __PRETTY_FUNCTION__, | |
174 | interval_msec, | |
175 | src_str, grp_str); | |
176 | } | |
177 | ||
178 | THREAD_OFF(up->t_join_timer); | |
179 | THREAD_TIMER_MSEC_ON(master, up->t_join_timer, | |
180 | on_join_timer, | |
181 | up, interval_msec); | |
182 | } | |
183 | ||
184 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
185 | struct in_addr rpf_addr, | |
186 | int holdtime) | |
187 | { | |
188 | long t_joinsuppress_msec; | |
189 | long join_timer_remain_msec; | |
190 | ||
191 | t_joinsuppress_msec = MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
192 | 1000 * holdtime); | |
193 | ||
194 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
195 | ||
196 | if (PIM_DEBUG_PIM_TRACE) { | |
197 | char src_str[100]; | |
198 | char grp_str[100]; | |
199 | char rpf_str[100]; | |
200 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
201 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
202 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); | |
203 | zlog_debug("%s %s: detected Join(%s,%s) to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", | |
204 | __FILE__, __PRETTY_FUNCTION__, | |
205 | src_str, grp_str, | |
206 | rpf_str, | |
207 | join_timer_remain_msec, t_joinsuppress_msec); | |
208 | } | |
209 | ||
210 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
211 | if (PIM_DEBUG_PIM_TRACE) { | |
212 | char src_str[100]; | |
213 | char grp_str[100]; | |
214 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
215 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
216 | zlog_debug("%s %s: suppressing Join(S,G)=(%s,%s) for %ld msec", | |
217 | __FILE__, __PRETTY_FUNCTION__, | |
218 | src_str, grp_str, t_joinsuppress_msec); | |
219 | } | |
220 | ||
221 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
222 | } | |
223 | } | |
224 | ||
225 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
226 | struct pim_upstream *up, | |
227 | struct in_addr rpf_addr) | |
228 | { | |
229 | long join_timer_remain_msec; | |
230 | int t_override_msec; | |
231 | ||
232 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
233 | t_override_msec = pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
234 | ||
235 | if (PIM_DEBUG_PIM_TRACE) { | |
236 | char src_str[100]; | |
237 | char grp_str[100]; | |
238 | char rpf_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 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); | |
242 | zlog_debug("%s: to RPF'(%s,%s)=%s: join_timer=%ld msec t_override=%d msec", | |
243 | debug_label, | |
244 | src_str, grp_str, rpf_str, | |
245 | join_timer_remain_msec, t_override_msec); | |
246 | } | |
247 | ||
248 | if (join_timer_remain_msec > t_override_msec) { | |
249 | if (PIM_DEBUG_PIM_TRACE) { | |
250 | char src_str[100]; | |
251 | char grp_str[100]; | |
252 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
253 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
254 | zlog_debug("%s: decreasing (S,G)=(%s,%s) join timer to t_override=%d msec", | |
255 | debug_label, | |
256 | src_str, grp_str, | |
257 | t_override_msec); | |
258 | } | |
259 | ||
260 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
261 | } | |
262 | } | |
263 | ||
264 | static void forward_on(struct pim_upstream *up) | |
265 | { | |
266 | struct listnode *ifnode; | |
267 | struct listnode *ifnextnode; | |
268 | struct listnode *chnode; | |
269 | struct listnode *chnextnode; | |
270 | struct interface *ifp; | |
271 | struct pim_interface *pim_ifp; | |
272 | struct pim_ifchannel *ch; | |
273 | ||
274 | /* scan all interfaces */ | |
469351b3 | 275 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
276 | pim_ifp = ifp->info; |
277 | if (!pim_ifp) | |
278 | continue; | |
279 | ||
280 | /* scan per-interface (S,G) state */ | |
281 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
282 | ||
283 | if (ch->upstream != up) | |
284 | continue; | |
285 | ||
286 | if (pim_macro_chisin_oiflist(ch)) | |
287 | pim_forward_start(ch); | |
288 | ||
289 | } /* scan iface channel list */ | |
290 | } /* scan iflist */ | |
291 | } | |
292 | ||
293 | static void forward_off(struct pim_upstream *up) | |
294 | { | |
295 | struct listnode *ifnode; | |
296 | struct listnode *ifnextnode; | |
297 | struct listnode *chnode; | |
298 | struct listnode *chnextnode; | |
299 | struct interface *ifp; | |
300 | struct pim_interface *pim_ifp; | |
301 | struct pim_ifchannel *ch; | |
302 | ||
303 | /* scan all interfaces */ | |
469351b3 | 304 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
305 | pim_ifp = ifp->info; |
306 | if (!pim_ifp) | |
307 | continue; | |
308 | ||
309 | /* scan per-interface (S,G) state */ | |
310 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
311 | ||
312 | if (ch->upstream != up) | |
313 | continue; | |
314 | ||
315 | pim_forward_stop(ch); | |
316 | ||
317 | } /* scan iface channel list */ | |
318 | } /* scan iflist */ | |
319 | } | |
320 | ||
321 | static void pim_upstream_switch(struct pim_upstream *up, | |
322 | enum pim_upstream_state new_state) | |
323 | { | |
324 | enum pim_upstream_state old_state = up->join_state; | |
325 | ||
326 | zassert(old_state != new_state); | |
327 | ||
328 | up->join_state = new_state; | |
329 | up->state_transition = pim_time_monotonic_sec(); | |
330 | ||
331 | if (PIM_DEBUG_PIM_EVENTS) { | |
332 | char src_str[100]; | |
333 | char grp_str[100]; | |
334 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
335 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
336 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G)=(%s,%s)", | |
337 | __PRETTY_FUNCTION__, | |
338 | ((new_state == PIM_UPSTREAM_JOINED) ? "JOINED" : "NOTJOINED"), | |
339 | src_str, grp_str); | |
340 | } | |
341 | ||
342 | pim_upstream_update_assert_tracking_desired(up); | |
343 | ||
344 | if (new_state == PIM_UPSTREAM_JOINED) { | |
345 | forward_on(up); | |
56638739 | 346 | pim_upstream_send_join (up); |
12e41d03 DL |
347 | join_timer_start(up); |
348 | } | |
349 | else { | |
350 | forward_off(up); | |
351 | pim_joinprune_send(up->rpf.source_nexthop.interface, | |
352 | up->rpf.rpf_addr, | |
353 | up->source_addr, | |
354 | up->group_addr, | |
355 | 0 /* prune */); | |
356 | zassert(up->t_join_timer); | |
357 | THREAD_OFF(up->t_join_timer); | |
358 | } | |
359 | ||
360 | } | |
361 | ||
8f5f5e91 | 362 | |
12e41d03 | 363 | static struct pim_upstream *pim_upstream_new(struct in_addr source_addr, |
651d0f71 DS |
364 | struct in_addr group_addr, |
365 | struct interface *incoming) | |
12e41d03 DL |
366 | { |
367 | struct pim_upstream *up; | |
2f702571 | 368 | enum pim_rpf_result rpf_result; |
12e41d03 DL |
369 | |
370 | up = XMALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); | |
371 | if (!up) { | |
372 | zlog_err("%s: PIM XMALLOC(%zu) failure", | |
373 | __PRETTY_FUNCTION__, sizeof(*up)); | |
8f5f5e91 | 374 | return NULL; |
12e41d03 DL |
375 | } |
376 | ||
377 | up->source_addr = source_addr; | |
8f5f5e91 DS |
378 | if (!pim_rp_set_upstream_addr (&up->upstream_addr, source_addr)) |
379 | { | |
380 | if (PIM_DEBUG_PIM_TRACE) | |
381 | zlog_debug("%s: Received a (*,G) with no RP configured", __PRETTY_FUNCTION__); | |
382 | ||
383 | XFREE (MTYPE_PIM_UPSTREAM, up); | |
384 | return NULL; | |
385 | } | |
386 | ||
12e41d03 DL |
387 | up->group_addr = group_addr; |
388 | up->flags = 0; | |
389 | up->ref_count = 1; | |
4a4c4a07 DS |
390 | up->t_join_timer = NULL; |
391 | up->t_ka_timer = NULL; | |
792f4d29 | 392 | up->t_rs_timer = NULL; |
12e41d03 DL |
393 | up->join_state = 0; |
394 | up->state_transition = pim_time_monotonic_sec(); | |
4a4c4a07 | 395 | up->channel_oil = NULL; |
f9e0ab5b | 396 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; |
12e41d03 DL |
397 | |
398 | up->rpf.source_nexthop.interface = 0; | |
399 | up->rpf.source_nexthop.mrib_nexthop_addr.s_addr = PIM_NET_INADDR_ANY; | |
400 | up->rpf.source_nexthop.mrib_metric_preference = qpim_infinite_assert_metric.metric_preference; | |
401 | up->rpf.source_nexthop.mrib_route_metric = qpim_infinite_assert_metric.route_metric; | |
402 | up->rpf.rpf_addr.s_addr = PIM_NET_INADDR_ANY; | |
403 | ||
651d0f71 | 404 | rpf_result = pim_rpf_update(up, 0, incoming); |
2f702571 DS |
405 | if (rpf_result == PIM_RPF_FAILURE) { |
406 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
407 | return NULL; | |
408 | } | |
12e41d03 DL |
409 | |
410 | listnode_add(qpim_upstream_list, up); | |
411 | ||
412 | return up; | |
413 | } | |
414 | ||
415 | struct pim_upstream *pim_upstream_find(struct in_addr source_addr, | |
416 | struct in_addr group_addr) | |
417 | { | |
418 | struct listnode *up_node; | |
419 | struct pim_upstream *up; | |
420 | ||
421 | for (ALL_LIST_ELEMENTS_RO(qpim_upstream_list, up_node, up)) { | |
d8cd119b DS |
422 | if (group_addr.s_addr == up->group_addr.s_addr) { |
423 | if ((up->source_addr.s_addr == INADDR_ANY) || | |
424 | (source_addr.s_addr == up->source_addr.s_addr)) { | |
425 | return up; | |
426 | } | |
12e41d03 DL |
427 | } |
428 | } | |
429 | ||
d7259eac | 430 | return NULL; |
12e41d03 DL |
431 | } |
432 | ||
433 | struct pim_upstream *pim_upstream_add(struct in_addr source_addr, | |
651d0f71 DS |
434 | struct in_addr group_addr, |
435 | struct interface *incoming) | |
12e41d03 DL |
436 | { |
437 | struct pim_upstream *up; | |
438 | ||
439 | up = pim_upstream_find(source_addr, group_addr); | |
440 | if (up) { | |
441 | ++up->ref_count; | |
442 | } | |
443 | else { | |
651d0f71 | 444 | up = pim_upstream_new(source_addr, group_addr, incoming); |
12e41d03 DL |
445 | } |
446 | ||
447 | return up; | |
448 | } | |
449 | ||
450 | void pim_upstream_del(struct pim_upstream *up) | |
451 | { | |
452 | --up->ref_count; | |
453 | ||
454 | if (up->ref_count < 1) { | |
455 | pim_upstream_delete(up); | |
456 | } | |
457 | } | |
458 | ||
459 | /* | |
460 | Evaluate JoinDesired(S,G): | |
461 | ||
462 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
463 | in the set: | |
464 | ||
465 | inherited_olist(S,G) = | |
466 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
467 | ||
468 | JoinDesired(S,G) may be affected by changes in the following: | |
469 | ||
470 | pim_ifp->primary_address | |
471 | pim_ifp->pim_dr_addr | |
472 | ch->ifassert_winner_metric | |
473 | ch->ifassert_winner | |
474 | ch->local_ifmembership | |
475 | ch->ifjoin_state | |
476 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
477 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
478 | ch->upstream->rpf.source_nexthop.interface | |
479 | ||
480 | See also pim_upstream_update_join_desired() below. | |
481 | */ | |
482 | int pim_upstream_evaluate_join_desired(struct pim_upstream *up) | |
483 | { | |
484 | struct listnode *ifnode; | |
485 | struct listnode *ifnextnode; | |
486 | struct listnode *chnode; | |
487 | struct listnode *chnextnode; | |
488 | struct interface *ifp; | |
489 | struct pim_interface *pim_ifp; | |
490 | struct pim_ifchannel *ch; | |
491 | ||
492 | /* scan all interfaces */ | |
469351b3 | 493 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
494 | pim_ifp = ifp->info; |
495 | if (!pim_ifp) | |
496 | continue; | |
497 | ||
498 | /* scan per-interface (S,G) state */ | |
499 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
500 | if (ch->upstream != up) | |
501 | continue; | |
502 | ||
503 | if (pim_macro_ch_lost_assert(ch)) | |
504 | continue; /* keep searching */ | |
505 | ||
506 | if (pim_macro_chisin_joins_or_include(ch)) | |
507 | return 1; /* true */ | |
508 | } /* scan iface channel list */ | |
509 | } /* scan iflist */ | |
510 | ||
511 | return 0; /* false */ | |
512 | } | |
513 | ||
514 | /* | |
515 | See also pim_upstream_evaluate_join_desired() above. | |
516 | */ | |
517 | void pim_upstream_update_join_desired(struct pim_upstream *up) | |
518 | { | |
519 | int was_join_desired; /* boolean */ | |
520 | int is_join_desired; /* boolean */ | |
521 | ||
522 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
523 | ||
524 | is_join_desired = pim_upstream_evaluate_join_desired(up); | |
525 | if (is_join_desired) | |
526 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
527 | else | |
528 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
529 | ||
530 | /* switched from false to true */ | |
531 | if (is_join_desired && !was_join_desired) { | |
532 | zassert(up->join_state == PIM_UPSTREAM_NOTJOINED); | |
533 | pim_upstream_switch(up, PIM_UPSTREAM_JOINED); | |
534 | return; | |
535 | } | |
536 | ||
537 | /* switched from true to false */ | |
538 | if (!is_join_desired && was_join_desired) { | |
539 | zassert(up->join_state == PIM_UPSTREAM_JOINED); | |
540 | pim_upstream_switch(up, PIM_UPSTREAM_NOTJOINED); | |
541 | return; | |
542 | } | |
543 | } | |
544 | ||
545 | /* | |
546 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
547 | Transitions from Joined State | |
548 | RPF'(S,G) GenID changes | |
549 | ||
550 | The upstream (S,G) state machine remains in Joined state. If the | |
551 | Join Timer is set to expire in more than t_override seconds, reset | |
552 | it so that it expires after t_override seconds. | |
553 | */ | |
554 | void pim_upstream_rpf_genid_changed(struct in_addr neigh_addr) | |
555 | { | |
556 | struct listnode *up_node; | |
557 | struct listnode *up_nextnode; | |
558 | struct pim_upstream *up; | |
559 | ||
560 | /* | |
561 | Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
562 | */ | |
563 | for (ALL_LIST_ELEMENTS(qpim_upstream_list, up_node, up_nextnode, up)) { | |
564 | ||
565 | if (PIM_DEBUG_PIM_TRACE) { | |
566 | char neigh_str[100]; | |
567 | char src_str[100]; | |
568 | char grp_str[100]; | |
569 | char rpf_addr_str[100]; | |
570 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, sizeof(neigh_str)); | |
571 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
572 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
573 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr, rpf_addr_str, sizeof(rpf_addr_str)); | |
574 | zlog_debug("%s: matching neigh=%s against upstream (S,G)=(%s,%s) joined=%d rpf_addr=%s", | |
575 | __PRETTY_FUNCTION__, | |
576 | neigh_str, src_str, grp_str, | |
577 | up->join_state == PIM_UPSTREAM_JOINED, | |
578 | rpf_addr_str); | |
579 | } | |
580 | ||
581 | /* consider only (S,G) upstream in Joined state */ | |
582 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
583 | continue; | |
584 | ||
585 | /* match RPF'(S,G)=neigh_addr */ | |
586 | if (up->rpf.rpf_addr.s_addr != neigh_addr.s_addr) | |
587 | continue; | |
588 | ||
589 | pim_upstream_join_timer_decrease_to_t_override("RPF'(S,G) GenID change", | |
590 | up, neigh_addr); | |
591 | } | |
592 | } | |
593 | ||
594 | ||
595 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
596 | struct interface *old_rpf_ifp) | |
597 | { | |
598 | struct listnode *ifnode; | |
599 | struct listnode *ifnextnode; | |
600 | struct interface *ifp; | |
601 | ||
602 | /* scan all interfaces */ | |
469351b3 | 603 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
604 | struct listnode *chnode; |
605 | struct listnode *chnextnode; | |
606 | struct pim_ifchannel *ch; | |
607 | struct pim_interface *pim_ifp; | |
608 | ||
609 | pim_ifp = ifp->info; | |
610 | if (!pim_ifp) | |
611 | continue; | |
612 | ||
613 | /* search all ifchannels */ | |
614 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
615 | if (ch->upstream != up) | |
616 | continue; | |
617 | ||
618 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
619 | if ( | |
620 | /* RPF_interface(S) was NOT I */ | |
621 | (old_rpf_ifp == ch->interface) | |
622 | && | |
623 | /* RPF_interface(S) stopped being I */ | |
624 | (ch->upstream->rpf.source_nexthop.interface != ch->interface) | |
625 | ) { | |
626 | assert_action_a5(ch); | |
627 | } | |
628 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
629 | ||
630 | pim_ifchannel_update_assert_tracking_desired(ch); | |
631 | } | |
632 | } | |
633 | } | |
634 | ||
635 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
636 | { | |
637 | struct listnode *ifnode; | |
638 | struct listnode *ifnextnode; | |
639 | struct listnode *chnode; | |
640 | struct listnode *chnextnode; | |
641 | struct interface *ifp; | |
642 | struct pim_interface *pim_ifp; | |
643 | struct pim_ifchannel *ch; | |
644 | ||
645 | /* scan all interfaces */ | |
469351b3 | 646 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
647 | pim_ifp = ifp->info; |
648 | if (!pim_ifp) | |
649 | continue; | |
650 | ||
651 | /* scan per-interface (S,G) state */ | |
652 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
653 | ||
654 | if (ch->upstream != up) | |
655 | continue; | |
656 | ||
657 | pim_ifchannel_update_could_assert(ch); | |
658 | ||
659 | } /* scan iface channel list */ | |
660 | } /* scan iflist */ | |
661 | } | |
662 | ||
663 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
664 | { | |
665 | struct listnode *ifnode; | |
666 | struct listnode *ifnextnode; | |
667 | struct listnode *chnode; | |
668 | struct listnode *chnextnode; | |
669 | struct interface *ifp; | |
670 | struct pim_interface *pim_ifp; | |
671 | struct pim_ifchannel *ch; | |
672 | ||
673 | /* scan all interfaces */ | |
469351b3 | 674 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
675 | pim_ifp = ifp->info; |
676 | if (!pim_ifp) | |
677 | continue; | |
678 | ||
679 | /* scan per-interface (S,G) state */ | |
680 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
681 | ||
682 | if (ch->upstream != up) | |
683 | continue; | |
684 | ||
685 | pim_ifchannel_update_my_assert_metric(ch); | |
686 | ||
687 | } /* scan iface channel list */ | |
688 | } /* scan iflist */ | |
689 | } | |
690 | ||
691 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
692 | { | |
693 | struct listnode *ifnode; | |
694 | struct listnode *ifnextnode; | |
695 | struct listnode *chnode; | |
696 | struct listnode *chnextnode; | |
697 | struct interface *ifp; | |
698 | struct pim_interface *pim_ifp; | |
699 | struct pim_ifchannel *ch; | |
700 | ||
701 | /* scan all interfaces */ | |
469351b3 | 702 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
703 | pim_ifp = ifp->info; |
704 | if (!pim_ifp) | |
705 | continue; | |
706 | ||
707 | /* scan per-interface (S,G) state */ | |
708 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
709 | ||
710 | if (ch->upstream != up) | |
711 | continue; | |
712 | ||
713 | pim_ifchannel_update_assert_tracking_desired(ch); | |
714 | ||
715 | } /* scan iface channel list */ | |
716 | } /* scan iflist */ | |
717 | } | |
f14248dd DS |
718 | |
719 | /* | |
720 | * On an RP, the PMBR value must be cleared when the | |
721 | * Keepalive Timer expires | |
722 | */ | |
723 | static int | |
724 | pim_upstream_keep_alive_timer (struct thread *t) | |
725 | { | |
726 | struct pim_upstream *up; | |
727 | ||
728 | up = THREAD_ARG(t); | |
729 | ||
25a335e0 DS |
730 | if (I_am_RP (up->group_addr)) |
731 | { | |
732 | pim_br_clear_pmbr (up->source_addr, up->group_addr); | |
733 | /* | |
734 | * We need to do more here :) | |
735 | * But this is the start. | |
736 | */ | |
737 | } | |
738 | else | |
739 | { | |
740 | pim_mroute_update_counters (up->channel_oil); | |
f14248dd | 741 | |
25a335e0 DS |
742 | if (up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) |
743 | { | |
744 | pim_mroute_del (up->channel_oil); | |
745 | pim_upstream_delete (up); | |
746 | } | |
747 | else | |
748 | { | |
749 | up->t_ka_timer = NULL; | |
750 | pim_upstream_keep_alive_timer_start (up, PIM_KEEPALIVE_PERIOD); | |
751 | } | |
752 | } | |
cb40b272 | 753 | return 1; |
f14248dd DS |
754 | } |
755 | ||
f14248dd DS |
756 | void |
757 | pim_upstream_keep_alive_timer_start (struct pim_upstream *up, | |
758 | uint32_t time) | |
759 | { | |
760 | THREAD_TIMER_ON (master, | |
761 | up->t_ka_timer, | |
762 | pim_upstream_keep_alive_timer, | |
763 | up, time); | |
764 | } | |
cb40b272 DS |
765 | |
766 | /* | |
767 | * 4.2.1 Last-Hop Switchover to the SPT | |
768 | * | |
769 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
770 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
771 | * router, it has the option of switching to receive the traffic on a | |
772 | * shortest path tree (SPT). | |
773 | * | |
774 | * The decision for a router to switch to the SPT is controlled as | |
775 | * follows: | |
776 | * | |
777 | * void | |
778 | * CheckSwitchToSpt(S,G) { | |
779 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
780 | * (+) pim_include(S,G) != NULL ) | |
781 | * AND SwitchToSptDesired(S,G) ) { | |
782 | * # Note: Restarting the KAT will result in the SPT switch | |
783 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
784 | * } | |
785 | * } | |
786 | * | |
787 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
788 | * defined. An "infinite threshold" policy can be implemented by making | |
789 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
790 | * first packet" policy can be implemented by making | |
791 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
792 | * received for the source and group. | |
793 | */ | |
794 | int | |
795 | pim_upstream_switch_to_spt_desired (struct in_addr source, struct in_addr group) | |
796 | { | |
797 | return 0; | |
798 | } | |
d7259eac DS |
799 | |
800 | const char * | |
801 | pim_upstream_state2str (struct pim_upstream *up) | |
802 | { | |
803 | switch (up->join_state) | |
804 | { | |
805 | case PIM_UPSTREAM_NOTJOINED: | |
806 | return "NtJnd"; | |
807 | break; | |
808 | case PIM_UPSTREAM_JOINED: | |
809 | return "Jnd"; | |
810 | break; | |
811 | case PIM_UPSTREAM_JOIN_PENDING: | |
812 | return "JPend"; | |
813 | break; | |
814 | case PIM_UPSTREAM_PRUNE: | |
815 | return "Prune"; | |
816 | break; | |
817 | } | |
818 | return "Unkwn"; | |
819 | } | |
627ed2a3 DS |
820 | |
821 | static int | |
822 | pim_upstream_register_stop_timer (struct thread *t) | |
823 | { | |
824 | struct pim_upstream *up; | |
825 | struct pim_rpf *rpg; | |
826 | struct ip ip_hdr; | |
827 | ||
828 | up = THREAD_ARG (t); | |
829 | ||
830 | up->t_rs_timer = NULL; | |
831 | ||
832 | if (PIM_DEBUG_TRACE) | |
833 | { | |
834 | char src_str[100]; | |
835 | char grp_str[100]; | |
836 | ||
837 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
838 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
839 | zlog_debug ("%s: (S,G)=(%s,%s) upstream register stop timer %d", | |
840 | __PRETTY_FUNCTION__, src_str, grp_str, up->join_state); | |
841 | } | |
842 | ||
843 | switch (up->join_state) | |
844 | { | |
845 | case PIM_UPSTREAM_JOIN_PENDING: | |
846 | up->join_state = PIM_UPSTREAM_JOINED; | |
847 | break; | |
848 | case PIM_UPSTREAM_PRUNE: | |
849 | up->join_state = PIM_UPSTREAM_JOIN_PENDING; | |
850 | pim_upstream_start_register_stop_timer (up, 1); | |
851 | ||
852 | rpg = RP (up->group_addr); | |
853 | memset (&ip_hdr, 0, sizeof (struct ip)); | |
854 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
855 | ip_hdr.ip_hl = 5; | |
856 | ip_hdr.ip_v = 4; | |
857 | ip_hdr.ip_src = up->source_addr; | |
858 | ip_hdr.ip_dst = up->group_addr; | |
859 | ip_hdr.ip_len = 20; | |
860 | // checksum is broken | |
861 | pim_register_send ((uint8_t *)&ip_hdr, sizeof (struct ip), rpg, 1); | |
862 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
863 | break; | |
864 | default: | |
865 | break; | |
866 | } | |
867 | ||
868 | return 0; | |
869 | } | |
870 | ||
871 | void | |
872 | pim_upstream_start_register_stop_timer (struct pim_upstream *up, int null_register) | |
873 | { | |
874 | uint32_t time; | |
875 | ||
876 | if (up->t_rs_timer) | |
877 | { | |
878 | THREAD_TIMER_OFF (up->t_rs_timer); | |
879 | up->t_rs_timer = NULL; | |
880 | } | |
881 | ||
882 | if (!null_register) | |
883 | { | |
884 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
885 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
886 | time = lower + (random () % (upper - lower + 1)) - PIM_REGISTER_PROBE_PERIOD; | |
887 | } | |
888 | else | |
889 | time = PIM_REGISTER_PROBE_PERIOD; | |
890 | ||
891 | if (PIM_DEBUG_TRACE) | |
892 | { | |
893 | char src_str[100]; | |
894 | char grp_str[100]; | |
895 | ||
896 | pim_inet4_dump("<src?>", up->source_addr, src_str, sizeof(src_str)); | |
897 | pim_inet4_dump("<grp?>", up->group_addr, grp_str, sizeof(grp_str)); | |
898 | zlog_debug ("%s: (S,G)=(%s,%s) Starting upstream register stop timer %d", | |
899 | __PRETTY_FUNCTION__, src_str, grp_str, time); | |
900 | } | |
901 | THREAD_TIMER_ON (master, up->t_rs_timer, | |
902 | pim_upstream_register_stop_timer, | |
903 | up, time); | |
904 | } |