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Commit | Line | Data |
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12e41d03 | 1 | /* |
896014f4 DL |
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 | */ | |
12e41d03 DL |
19 | |
20 | #include <zebra.h> | |
21 | ||
22 | #include "zebra/rib.h" | |
23 | ||
24 | #include "log.h" | |
25 | #include "zclient.h" | |
26 | #include "memory.h" | |
27 | #include "thread.h" | |
28 | #include "linklist.h" | |
dfe43e25 DW |
29 | #include "vty.h" |
30 | #include "plist.h" | |
0f588989 DS |
31 | #include "hash.h" |
32 | #include "jhash.h" | |
9c5e4d62 | 33 | #include "wheel.h" |
12e41d03 DL |
34 | |
35 | #include "pimd.h" | |
36 | #include "pim_pim.h" | |
37 | #include "pim_str.h" | |
38 | #include "pim_time.h" | |
39 | #include "pim_iface.h" | |
40 | #include "pim_join.h" | |
41 | #include "pim_zlookup.h" | |
42 | #include "pim_upstream.h" | |
43 | #include "pim_ifchannel.h" | |
44 | #include "pim_neighbor.h" | |
45 | #include "pim_rpf.h" | |
46 | #include "pim_zebra.h" | |
47 | #include "pim_oil.h" | |
48 | #include "pim_macro.h" | |
8f5f5e91 | 49 | #include "pim_rp.h" |
f14248dd | 50 | #include "pim_br.h" |
627ed2a3 | 51 | #include "pim_register.h" |
3c72d654 | 52 | #include "pim_msdp.h" |
982bff89 | 53 | #include "pim_jp_agg.h" |
1bc98276 | 54 | #include "pim_nht.h" |
15a5dafe | 55 | #include "pim_ssm.h" |
12e41d03 | 56 | |
0f588989 DS |
57 | struct hash *pim_upstream_hash = NULL; |
58 | struct list *pim_upstream_list = NULL; | |
9c5e4d62 | 59 | struct timer_wheel *pim_upstream_sg_wheel = NULL; |
0f588989 | 60 | |
982bff89 | 61 | static void join_timer_stop(struct pim_upstream *up); |
d62a17ae | 62 | static void |
63 | pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); | |
12e41d03 | 64 | |
cfa91a87 DS |
65 | /* |
66 | * A (*,G) or a (*,*) is going away | |
67 | * remove the parent pointer from | |
68 | * those pointing at us | |
69 | */ | |
d62a17ae | 70 | static void pim_upstream_remove_children(struct pim_upstream *up) |
cfa91a87 | 71 | { |
d62a17ae | 72 | struct pim_upstream *child; |
73 | ||
74 | if (!up->sources) | |
75 | return; | |
76 | ||
77 | while (!list_isempty(up->sources)) { | |
78 | child = listnode_head(up->sources); | |
79 | listnode_delete(up->sources, child); | |
80 | if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(child->flags)) { | |
81 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(child->flags); | |
82 | child = pim_upstream_del(child, __PRETTY_FUNCTION__); | |
83 | } | |
84 | if (child) | |
85 | child->parent = NULL; | |
86 | } | |
87 | list_delete(up->sources); | |
88 | up->sources = NULL; | |
cfa91a87 DS |
89 | } |
90 | ||
91 | /* | |
92 | * A (*,G) or a (*,*) is being created | |
93 | * Find the children that would point | |
94 | * at us. | |
95 | */ | |
d62a17ae | 96 | static void pim_upstream_find_new_children(struct pim_upstream *up) |
cfa91a87 | 97 | { |
d62a17ae | 98 | struct pim_upstream *child; |
99 | struct listnode *ch_node; | |
100 | ||
101 | if ((up->sg.src.s_addr != INADDR_ANY) | |
102 | && (up->sg.grp.s_addr != INADDR_ANY)) | |
103 | return; | |
104 | ||
105 | if ((up->sg.src.s_addr == INADDR_ANY) | |
106 | && (up->sg.grp.s_addr == INADDR_ANY)) | |
107 | return; | |
108 | ||
109 | for (ALL_LIST_ELEMENTS_RO(pim_upstream_list, ch_node, child)) { | |
110 | if ((up->sg.grp.s_addr != INADDR_ANY) | |
111 | && (child->sg.grp.s_addr == up->sg.grp.s_addr) | |
112 | && (child != up)) { | |
113 | child->parent = up; | |
114 | listnode_add_sort(up->sources, child); | |
115 | } | |
03417ccd | 116 | } |
cfa91a87 DS |
117 | } |
118 | ||
4d99418b DS |
119 | /* |
120 | * If we have a (*,*) || (S,*) there is no parent | |
121 | * If we have a (S,G), find the (*,G) | |
122 | * If we have a (*,G), find the (*,*) | |
123 | */ | |
d62a17ae | 124 | static struct pim_upstream *pim_upstream_find_parent(struct pim_upstream *child) |
4d99418b | 125 | { |
d62a17ae | 126 | struct prefix_sg any = child->sg; |
127 | struct pim_upstream *up = NULL; | |
4d99418b | 128 | |
d62a17ae | 129 | // (S,G) |
130 | if ((child->sg.src.s_addr != INADDR_ANY) | |
131 | && (child->sg.grp.s_addr != INADDR_ANY)) { | |
132 | any.src.s_addr = INADDR_ANY; | |
133 | up = pim_upstream_find(&any); | |
03417ccd | 134 | |
d62a17ae | 135 | if (up) |
136 | listnode_add(up->sources, child); | |
03417ccd | 137 | |
d62a17ae | 138 | return up; |
139 | } | |
4d99418b | 140 | |
d62a17ae | 141 | return NULL; |
4d99418b DS |
142 | } |
143 | ||
12e41d03 DL |
144 | void pim_upstream_free(struct pim_upstream *up) |
145 | { | |
d62a17ae | 146 | XFREE(MTYPE_PIM_UPSTREAM, up); |
147 | up = NULL; | |
12e41d03 DL |
148 | } |
149 | ||
150 | static void upstream_channel_oil_detach(struct pim_upstream *up) | |
151 | { | |
d62a17ae | 152 | if (up->channel_oil) { |
153 | /* Detaching from channel_oil, channel_oil may exist post del, | |
154 | but upstream would not keep reference of it | |
155 | */ | |
156 | pim_channel_oil_del(up->channel_oil); | |
157 | up->channel_oil = NULL; | |
158 | } | |
12e41d03 DL |
159 | } |
160 | ||
d62a17ae | 161 | struct pim_upstream *pim_upstream_del(struct pim_upstream *up, const char *name) |
12e41d03 | 162 | { |
d62a17ae | 163 | bool notify_msdp = false; |
164 | struct prefix nht_p; | |
165 | ||
166 | if (PIM_DEBUG_TRACE) | |
167 | zlog_debug( | |
168 | "%s(%s): Delete %s ref count: %d , flags: %d c_oil ref count %d (Pre decrement)", | |
169 | __PRETTY_FUNCTION__, name, up->sg_str, up->ref_count, | |
170 | up->flags, up->channel_oil->oil_ref_count); | |
171 | ||
172 | --up->ref_count; | |
173 | ||
174 | if (up->ref_count >= 1) | |
175 | return up; | |
176 | ||
177 | THREAD_OFF(up->t_ka_timer); | |
178 | THREAD_OFF(up->t_rs_timer); | |
179 | THREAD_OFF(up->t_msdp_reg_timer); | |
180 | ||
181 | if (up->join_state == PIM_UPSTREAM_JOINED) { | |
182 | pim_jp_agg_single_upstream_send(&up->rpf, up, 0); | |
183 | ||
184 | if (up->sg.src.s_addr == INADDR_ANY) { | |
185 | /* if a (*, G) entry in the joined state is being | |
186 | * deleted we | |
187 | * need to notify MSDP */ | |
188 | notify_msdp = true; | |
189 | } | |
190 | } | |
191 | ||
192 | join_timer_stop(up); | |
193 | pim_jp_agg_upstream_verification(up, false); | |
194 | up->rpf.source_nexthop.interface = NULL; | |
195 | ||
196 | if (up->sg.src.s_addr != INADDR_ANY) { | |
197 | wheel_remove_item(pim_upstream_sg_wheel, up); | |
198 | notify_msdp = true; | |
199 | } | |
200 | ||
201 | pim_upstream_remove_children(up); | |
202 | if (up->sources) | |
203 | list_delete(up->sources); | |
204 | up->sources = NULL; | |
205 | pim_mroute_del(up->channel_oil, __PRETTY_FUNCTION__); | |
206 | upstream_channel_oil_detach(up); | |
207 | ||
208 | list_delete(up->ifchannels); | |
209 | up->ifchannels = NULL; | |
210 | ||
211 | /* | |
212 | notice that listnode_delete() can't be moved | |
213 | into pim_upstream_free() because the later is | |
214 | called by list_delete_all_node() | |
215 | */ | |
216 | if (up->parent && up->parent->sources) | |
217 | listnode_delete(up->parent->sources, up); | |
218 | up->parent = NULL; | |
219 | ||
220 | listnode_delete(pim_upstream_list, up); | |
221 | hash_release(pim_upstream_hash, up); | |
222 | ||
223 | if (notify_msdp) { | |
224 | pim_msdp_up_del(&up->sg); | |
225 | } | |
226 | ||
227 | /* Deregister addr with Zebra NHT */ | |
228 | nht_p.family = AF_INET; | |
229 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
230 | nht_p.u.prefix4 = up->upstream_addr; | |
231 | if (PIM_DEBUG_TRACE) { | |
232 | char buf[PREFIX2STR_BUFFER]; | |
233 | prefix2str(&nht_p, buf, sizeof(buf)); | |
234 | zlog_debug("%s: Deregister upstream %s addr %s with Zebra NHT", | |
235 | __PRETTY_FUNCTION__, up->sg_str, buf); | |
236 | } | |
237 | pim_delete_tracked_nexthop(&nht_p, up, NULL); | |
238 | ||
239 | pim_upstream_free(up); | |
240 | ||
241 | return NULL; | |
12e41d03 DL |
242 | } |
243 | ||
d62a17ae | 244 | void pim_upstream_send_join(struct pim_upstream *up) |
12e41d03 | 245 | { |
d62a17ae | 246 | if (PIM_DEBUG_TRACE) { |
247 | char rpf_str[PREFIX_STRLEN]; | |
248 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, | |
249 | sizeof(rpf_str)); | |
250 | zlog_debug("%s: RPF'%s=%s(%s) for Interface %s", | |
251 | __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
252 | pim_upstream_state2str(up->join_state), | |
253 | up->rpf.source_nexthop.interface->name); | |
254 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
255 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", | |
256 | __PRETTY_FUNCTION__, up->sg_str, rpf_str); | |
257 | /* warning only */ | |
258 | } | |
259 | } | |
260 | ||
261 | /* send Join(S,G) to the current upstream neighbor */ | |
262 | pim_jp_agg_single_upstream_send(&up->rpf, up, 1 /* join */); | |
12e41d03 DL |
263 | } |
264 | ||
265 | static int on_join_timer(struct thread *t) | |
266 | { | |
d62a17ae | 267 | struct pim_upstream *up; |
12e41d03 | 268 | |
d62a17ae | 269 | up = THREAD_ARG(t); |
12e41d03 | 270 | |
d62a17ae | 271 | /* |
272 | * In the case of a HFR we will not ahve anyone to send this to. | |
273 | */ | |
274 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) | |
275 | return 0; | |
bb6e291f | 276 | |
d62a17ae | 277 | /* |
278 | * Don't send the join if the outgoing interface is a loopback | |
279 | * But since this might change leave the join timer running | |
280 | */ | |
281 | if (up->rpf.source_nexthop | |
282 | .interface && !if_is_loopback(up->rpf.source_nexthop.interface)) | |
283 | pim_upstream_send_join(up); | |
12e41d03 | 284 | |
d62a17ae | 285 | join_timer_start(up); |
12e41d03 | 286 | |
d62a17ae | 287 | return 0; |
12e41d03 DL |
288 | } |
289 | ||
982bff89 | 290 | static void join_timer_stop(struct pim_upstream *up) |
12e41d03 | 291 | { |
d62a17ae | 292 | struct pim_neighbor *nbr; |
982bff89 | 293 | |
d62a17ae | 294 | THREAD_OFF(up->t_join_timer); |
7eb90689 | 295 | |
d62a17ae | 296 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, |
297 | up->rpf.rpf_addr.u.prefix4); | |
982bff89 | 298 | |
d62a17ae | 299 | if (nbr) |
300 | pim_jp_agg_remove_group(nbr->upstream_jp_agg, up); | |
982bff89 | 301 | |
d62a17ae | 302 | pim_jp_agg_upstream_verification(up, false); |
982bff89 DS |
303 | } |
304 | ||
d62a17ae | 305 | void join_timer_start(struct pim_upstream *up) |
982bff89 | 306 | { |
d62a17ae | 307 | struct pim_neighbor *nbr = NULL; |
308 | ||
309 | if (up->rpf.source_nexthop.interface) { | |
310 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, | |
311 | up->rpf.rpf_addr.u.prefix4); | |
312 | ||
313 | if (PIM_DEBUG_PIM_EVENTS) { | |
314 | zlog_debug( | |
315 | "%s: starting %d sec timer for upstream (S,G)=%s", | |
316 | __PRETTY_FUNCTION__, qpim_t_periodic, | |
317 | up->sg_str); | |
318 | } | |
319 | } | |
320 | ||
321 | if (nbr) | |
322 | pim_jp_agg_add_group(nbr->upstream_jp_agg, up, 1); | |
323 | else { | |
324 | THREAD_OFF(up->t_join_timer); | |
325 | thread_add_timer(master, on_join_timer, up, qpim_t_periodic, | |
326 | &up->t_join_timer); | |
327 | } | |
328 | pim_jp_agg_upstream_verification(up, true); | |
12e41d03 DL |
329 | } |
330 | ||
982bff89 DS |
331 | /* |
332 | * This is only called when we are switching the upstream | |
333 | * J/P from one neighbor to another | |
334 | * | |
335 | * As such we need to remove from the old list and | |
336 | * add to the new list. | |
337 | */ | |
d62a17ae | 338 | void pim_upstream_join_timer_restart(struct pim_upstream *up, |
339 | struct pim_rpf *old) | |
12e41d03 | 340 | { |
d62a17ae | 341 | // THREAD_OFF(up->t_join_timer); |
342 | join_timer_start(up); | |
12e41d03 DL |
343 | } |
344 | ||
345 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
346 | int interval_msec) | |
347 | { | |
d62a17ae | 348 | if (PIM_DEBUG_PIM_EVENTS) { |
349 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", | |
350 | __PRETTY_FUNCTION__, interval_msec, up->sg_str); | |
351 | } | |
352 | ||
353 | THREAD_OFF(up->t_join_timer); | |
354 | thread_add_timer_msec(master, on_join_timer, up, interval_msec, | |
355 | &up->t_join_timer); | |
12e41d03 DL |
356 | } |
357 | ||
358 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
d62a17ae | 359 | struct in_addr rpf_addr, int holdtime) |
12e41d03 | 360 | { |
d62a17ae | 361 | long t_joinsuppress_msec; |
362 | long join_timer_remain_msec; | |
363 | ||
364 | t_joinsuppress_msec = | |
365 | MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
366 | 1000 * holdtime); | |
367 | ||
368 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
369 | ||
370 | if (PIM_DEBUG_TRACE) { | |
371 | char rpf_str[INET_ADDRSTRLEN]; | |
372 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); | |
373 | zlog_debug( | |
374 | "%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", | |
375 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
376 | join_timer_remain_msec, t_joinsuppress_msec); | |
377 | } | |
378 | ||
379 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
380 | if (PIM_DEBUG_TRACE) { | |
381 | zlog_debug( | |
382 | "%s %s: suppressing Join(S,G)=%s for %ld msec", | |
383 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, | |
384 | t_joinsuppress_msec); | |
385 | } | |
386 | ||
387 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
388 | } | |
12e41d03 DL |
389 | } |
390 | ||
391 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
d62a17ae | 392 | struct pim_upstream *up) |
12e41d03 | 393 | { |
d62a17ae | 394 | long join_timer_remain_msec; |
395 | int t_override_msec; | |
396 | ||
397 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
398 | t_override_msec = | |
399 | pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
400 | ||
401 | if (PIM_DEBUG_TRACE) { | |
402 | char rpf_str[INET_ADDRSTRLEN]; | |
403 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr.u.prefix4, rpf_str, | |
404 | sizeof(rpf_str)); | |
405 | zlog_debug( | |
406 | "%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", | |
407 | debug_label, up->sg_str, rpf_str, | |
408 | join_timer_remain_msec, t_override_msec); | |
409 | } | |
410 | ||
411 | if (join_timer_remain_msec > t_override_msec) { | |
412 | if (PIM_DEBUG_TRACE) { | |
413 | zlog_debug( | |
414 | "%s: decreasing (S,G)=%s join timer to t_override=%d msec", | |
415 | debug_label, up->sg_str, t_override_msec); | |
416 | } | |
417 | ||
418 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
419 | } | |
12e41d03 DL |
420 | } |
421 | ||
422 | static void forward_on(struct pim_upstream *up) | |
423 | { | |
d62a17ae | 424 | struct listnode *chnode; |
425 | struct listnode *chnextnode; | |
426 | struct pim_ifchannel *ch = NULL; | |
12e41d03 | 427 | |
d62a17ae | 428 | /* scan (S,G) state */ |
429 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
430 | if (pim_macro_chisin_oiflist(ch)) | |
431 | pim_forward_start(ch); | |
12e41d03 | 432 | |
d62a17ae | 433 | } /* scan iface channel list */ |
12e41d03 DL |
434 | } |
435 | ||
436 | static void forward_off(struct pim_upstream *up) | |
437 | { | |
d62a17ae | 438 | struct listnode *chnode; |
439 | struct listnode *chnextnode; | |
440 | struct pim_ifchannel *ch; | |
12e41d03 | 441 | |
d62a17ae | 442 | /* scan per-interface (S,G) state */ |
443 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
12e41d03 | 444 | |
d62a17ae | 445 | pim_forward_stop(ch); |
12e41d03 | 446 | |
d62a17ae | 447 | } /* scan iface channel list */ |
12e41d03 DL |
448 | } |
449 | ||
d62a17ae | 450 | static int pim_upstream_could_register(struct pim_upstream *up) |
bb6e291f | 451 | { |
d62a17ae | 452 | struct pim_interface *pim_ifp = NULL; |
453 | ||
454 | if (up->rpf.source_nexthop.interface) | |
455 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
456 | else { | |
457 | if (PIM_DEBUG_TRACE) | |
458 | zlog_debug("%s: up %s RPF is not present", | |
459 | __PRETTY_FUNCTION__, up->sg_str); | |
460 | } | |
bb6e291f | 461 | |
d62a17ae | 462 | if (pim_ifp && PIM_I_am_DR(pim_ifp) |
463 | && pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
464 | up->sg.src)) | |
465 | return 1; | |
bb6e291f | 466 | |
d62a17ae | 467 | return 0; |
bb6e291f DS |
468 | } |
469 | ||
15a5dafe | 470 | /* Source registration is supressed for SSM groups. When the SSM range changes |
471 | * we re-revaluate register setup for existing upstream entries */ | |
d62a17ae | 472 | void pim_upstream_register_reevaluate(void) |
15a5dafe | 473 | { |
d62a17ae | 474 | struct listnode *upnode; |
475 | struct pim_upstream *up; | |
476 | ||
477 | for (ALL_LIST_ELEMENTS_RO(pim_upstream_list, upnode, up)) { | |
478 | /* If FHR is set CouldRegister is True. Also check if the flow | |
479 | * is actually active; if it is not kat setup will trigger | |
480 | * source | |
481 | * registration whenever the flow becomes active. */ | |
482 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) || !up->t_ka_timer) | |
483 | continue; | |
484 | ||
485 | if (pim_is_grp_ssm(up->sg.grp)) { | |
486 | /* clear the register state for SSM groups */ | |
487 | if (up->reg_state != PIM_REG_NOINFO) { | |
488 | if (PIM_DEBUG_PIM_EVENTS) | |
489 | zlog_debug( | |
490 | "Clear register for %s as G is now SSM", | |
491 | up->sg_str); | |
492 | /* remove regiface from the OIL if it is there*/ | |
493 | pim_channel_del_oif(up->channel_oil, | |
494 | pim_regiface, | |
495 | PIM_OIF_FLAG_PROTO_PIM); | |
496 | up->reg_state = PIM_REG_NOINFO; | |
497 | } | |
498 | } else { | |
499 | /* register ASM sources with the RP */ | |
500 | if (up->reg_state == PIM_REG_NOINFO) { | |
501 | if (PIM_DEBUG_PIM_EVENTS) | |
502 | zlog_debug( | |
503 | "Register %s as G is now ASM", | |
504 | up->sg_str); | |
505 | pim_channel_add_oif(up->channel_oil, | |
506 | pim_regiface, | |
507 | PIM_OIF_FLAG_PROTO_PIM); | |
508 | up->reg_state = PIM_REG_JOIN; | |
509 | } | |
510 | } | |
511 | } | |
15a5dafe | 512 | } |
513 | ||
d62a17ae | 514 | void pim_upstream_switch(struct pim_upstream *up, |
515 | enum pim_upstream_state new_state) | |
12e41d03 | 516 | { |
d62a17ae | 517 | enum pim_upstream_state old_state = up->join_state; |
518 | ||
519 | if (PIM_DEBUG_PIM_EVENTS) { | |
520 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", | |
521 | __PRETTY_FUNCTION__, up->sg_str, | |
522 | pim_upstream_state2str(up->join_state), | |
523 | pim_upstream_state2str(new_state)); | |
524 | } | |
525 | ||
526 | up->join_state = new_state; | |
527 | if (old_state != new_state) | |
528 | up->state_transition = pim_time_monotonic_sec(); | |
529 | ||
530 | pim_upstream_update_assert_tracking_desired(up); | |
531 | ||
532 | if (new_state == PIM_UPSTREAM_JOINED) { | |
533 | if (old_state != PIM_UPSTREAM_JOINED) { | |
534 | int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags); | |
535 | forward_on(up); | |
536 | pim_msdp_up_join_state_changed(up); | |
537 | if (pim_upstream_could_register(up)) { | |
538 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
539 | if (!old_fhr | |
540 | && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM( | |
541 | up->flags)) { | |
542 | pim_upstream_keep_alive_timer_start( | |
543 | up, qpim_keep_alive_time); | |
544 | pim_register_join(up); | |
545 | } | |
546 | } else { | |
547 | pim_upstream_send_join(up); | |
548 | join_timer_start(up); | |
549 | } | |
550 | } else { | |
551 | forward_on(up); | |
552 | } | |
553 | } else { | |
554 | ||
555 | forward_off(up); | |
556 | if (old_state == PIM_UPSTREAM_JOINED) | |
557 | pim_msdp_up_join_state_changed(up); | |
558 | ||
559 | /* IHR, Trigger SGRpt on *,G IIF to prune S,G from RPT towards | |
560 | RP. | |
561 | If I am RP for G then send S,G prune to its IIF. */ | |
562 | if (pim_upstream_is_sg_rpt(up) && up->parent | |
563 | && !I_am_RP(up->sg.grp)) { | |
564 | if (PIM_DEBUG_PIM_TRACE_DETAIL) | |
565 | zlog_debug( | |
566 | "%s: *,G IIF %s S,G IIF %s ", | |
567 | __PRETTY_FUNCTION__, | |
568 | up->parent->rpf.source_nexthop | |
569 | .interface->name, | |
570 | up->rpf.source_nexthop.interface->name); | |
571 | pim_jp_agg_single_upstream_send(&up->parent->rpf, | |
572 | up->parent, | |
573 | 1 /* (W,G) Join */); | |
574 | } else | |
575 | pim_jp_agg_single_upstream_send(&up->rpf, up, | |
576 | 0 /* prune */); | |
577 | join_timer_stop(up); | |
578 | } | |
12e41d03 DL |
579 | } |
580 | ||
d62a17ae | 581 | int pim_upstream_compare(void *arg1, void *arg2) |
03417ccd | 582 | { |
d62a17ae | 583 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
584 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
03417ccd | 585 | |
d62a17ae | 586 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) |
587 | return -1; | |
03417ccd | 588 | |
d62a17ae | 589 | if (ntohl(up1->sg.grp.s_addr) > ntohl(up2->sg.grp.s_addr)) |
590 | return 1; | |
03417ccd | 591 | |
d62a17ae | 592 | if (ntohl(up1->sg.src.s_addr) < ntohl(up2->sg.src.s_addr)) |
593 | return -1; | |
03417ccd | 594 | |
d62a17ae | 595 | if (ntohl(up1->sg.src.s_addr) > ntohl(up2->sg.src.s_addr)) |
596 | return 1; | |
03417ccd | 597 | |
d62a17ae | 598 | return 0; |
03417ccd DS |
599 | } |
600 | ||
07335c8d | 601 | static struct pim_upstream * |
d62a17ae | 602 | pim_upstream_new(struct prefix_sg *sg, struct interface *incoming, int flags) |
12e41d03 | 603 | { |
d62a17ae | 604 | enum pim_rpf_result rpf_result; |
605 | struct pim_interface *pim_ifp; | |
606 | struct pim_upstream *up; | |
607 | ||
608 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); | |
609 | if (!up) { | |
610 | zlog_err("%s: PIM XCALLOC(%zu) failure", __PRETTY_FUNCTION__, | |
611 | sizeof(*up)); | |
612 | return NULL; | |
613 | } | |
614 | ||
615 | up->sg = *sg; | |
616 | pim_str_sg_set(sg, up->sg_str); | |
617 | up = hash_get(pim_upstream_hash, up, hash_alloc_intern); | |
618 | if (!pim_rp_set_upstream_addr(&up->upstream_addr, sg->src, sg->grp)) { | |
619 | if (PIM_DEBUG_TRACE) | |
620 | zlog_debug("%s: Received a (*,G) with no RP configured", | |
621 | __PRETTY_FUNCTION__); | |
622 | ||
623 | hash_release(pim_upstream_hash, up); | |
624 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
625 | return NULL; | |
626 | } | |
627 | ||
628 | up->parent = pim_upstream_find_parent(up); | |
629 | if (up->sg.src.s_addr == INADDR_ANY) { | |
630 | up->sources = list_new(); | |
631 | up->sources->cmp = pim_upstream_compare; | |
632 | } else | |
633 | up->sources = NULL; | |
634 | ||
635 | pim_upstream_find_new_children(up); | |
636 | up->flags = flags; | |
637 | up->ref_count = 1; | |
638 | up->t_join_timer = NULL; | |
639 | up->t_ka_timer = NULL; | |
640 | up->t_rs_timer = NULL; | |
641 | up->t_msdp_reg_timer = NULL; | |
642 | up->join_state = PIM_UPSTREAM_NOTJOINED; | |
643 | up->reg_state = PIM_REG_NOINFO; | |
644 | up->state_transition = pim_time_monotonic_sec(); | |
645 | up->channel_oil = NULL; | |
646 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; | |
647 | ||
648 | up->rpf.source_nexthop.interface = NULL; | |
649 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; | |
650 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = | |
651 | PIM_NET_INADDR_ANY; | |
652 | up->rpf.source_nexthop.mrib_metric_preference = | |
653 | qpim_infinite_assert_metric.metric_preference; | |
654 | up->rpf.source_nexthop.mrib_route_metric = | |
655 | qpim_infinite_assert_metric.route_metric; | |
656 | up->rpf.rpf_addr.family = AF_INET; | |
657 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
658 | ||
659 | up->ifchannels = list_new(); | |
660 | up->ifchannels->cmp = (int (*)(void *, void *))pim_ifchannel_compare; | |
661 | ||
662 | if (up->sg.src.s_addr != INADDR_ANY) | |
663 | wheel_add_item(pim_upstream_sg_wheel, up); | |
664 | ||
665 | rpf_result = pim_rpf_update(up, NULL, 1); | |
666 | if (rpf_result == PIM_RPF_FAILURE) { | |
667 | struct prefix nht_p; | |
668 | ||
669 | if (PIM_DEBUG_TRACE) | |
670 | zlog_debug( | |
671 | "%s: Attempting to create upstream(%s), Unable to RPF for source", | |
672 | __PRETTY_FUNCTION__, up->sg_str); | |
673 | ||
674 | nht_p.family = AF_INET; | |
675 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
676 | nht_p.u.prefix4 = up->upstream_addr; | |
677 | pim_delete_tracked_nexthop(&nht_p, up, NULL); | |
678 | ||
679 | if (up->parent) { | |
680 | listnode_delete(up->parent->sources, up); | |
681 | up->parent = NULL; | |
682 | } | |
683 | ||
684 | if (up->sg.src.s_addr != INADDR_ANY) | |
685 | wheel_remove_item(pim_upstream_sg_wheel, up); | |
686 | ||
687 | pim_upstream_remove_children(up); | |
688 | if (up->sources) | |
689 | list_delete(up->sources); | |
690 | ||
691 | hash_release(pim_upstream_hash, up); | |
692 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
693 | return NULL; | |
694 | } | |
695 | ||
696 | if (up->rpf.source_nexthop.interface) { | |
697 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
698 | if (pim_ifp) | |
699 | up->channel_oil = pim_channel_oil_add( | |
700 | &up->sg, pim_ifp->mroute_vif_index); | |
701 | } | |
702 | listnode_add_sort(pim_upstream_list, up); | |
703 | ||
704 | if (PIM_DEBUG_TRACE) { | |
705 | zlog_debug( | |
706 | "%s: Created Upstream %s upstream_addr %s ref count %d increment", | |
707 | __PRETTY_FUNCTION__, up->sg_str, | |
708 | inet_ntoa(up->upstream_addr), up->ref_count); | |
709 | } | |
710 | ||
711 | return up; | |
12e41d03 DL |
712 | } |
713 | ||
4ed0af70 | 714 | struct pim_upstream *pim_upstream_find(struct prefix_sg *sg) |
12e41d03 | 715 | { |
d62a17ae | 716 | struct pim_upstream lookup; |
717 | struct pim_upstream *up = NULL; | |
12e41d03 | 718 | |
d62a17ae | 719 | lookup.sg = *sg; |
720 | up = hash_lookup(pim_upstream_hash, &lookup); | |
721 | return up; | |
12e41d03 DL |
722 | } |
723 | ||
d62a17ae | 724 | struct pim_upstream *pim_upstream_find_or_add(struct prefix_sg *sg, |
725 | struct interface *incoming, | |
726 | int flags, const char *name) | |
e711cd3c | 727 | { |
d62a17ae | 728 | struct pim_upstream *up; |
729 | ||
730 | up = pim_upstream_find(sg); | |
731 | ||
732 | if (up) { | |
733 | if (!(up->flags & flags)) { | |
734 | up->flags |= flags; | |
735 | up->ref_count++; | |
736 | if (PIM_DEBUG_TRACE) | |
737 | zlog_debug( | |
738 | "%s(%s): upstream %s ref count %d increment", | |
739 | __PRETTY_FUNCTION__, name, up->sg_str, | |
740 | up->ref_count); | |
741 | } | |
742 | } else | |
743 | up = pim_upstream_add(sg, incoming, flags, name); | |
744 | ||
745 | return up; | |
e711cd3c DS |
746 | } |
747 | ||
d62a17ae | 748 | void pim_upstream_ref(struct pim_upstream *up, int flags, const char *name) |
1bf16443 | 749 | { |
d62a17ae | 750 | up->flags |= flags; |
751 | ++up->ref_count; | |
752 | if (PIM_DEBUG_TRACE) | |
753 | zlog_debug("%s(%s): upstream %s ref count %d increment", | |
754 | __PRETTY_FUNCTION__, name, up->sg_str, | |
755 | up->ref_count); | |
1bf16443 | 756 | } |
757 | ||
4ed0af70 | 758 | struct pim_upstream *pim_upstream_add(struct prefix_sg *sg, |
d62a17ae | 759 | struct interface *incoming, int flags, |
760 | const char *name) | |
12e41d03 | 761 | { |
d62a17ae | 762 | struct pim_upstream *up = NULL; |
763 | int found = 0; | |
764 | up = pim_upstream_find(sg); | |
765 | if (up) { | |
766 | pim_upstream_ref(up, flags, name); | |
767 | found = 1; | |
768 | } else { | |
769 | up = pim_upstream_new(sg, incoming, flags); | |
770 | } | |
771 | ||
772 | if (PIM_DEBUG_TRACE) { | |
773 | if (up) { | |
774 | char buf[PREFIX2STR_BUFFER]; | |
775 | prefix2str(&up->rpf.rpf_addr, buf, sizeof(buf)); | |
776 | zlog_debug("%s(%s): %s, iif %s (%s) found: %d: ref_count: %d", | |
f4075cb4 | 777 | __PRETTY_FUNCTION__, name, |
55785900 CS |
778 | up->sg_str, buf, up->rpf.source_nexthop.interface ? |
779 | up->rpf.source_nexthop.interface->name : "NIL" , | |
780 | found, up->ref_count); | |
d62a17ae | 781 | } else |
782 | zlog_debug("%s(%s): (%s) failure to create", | |
783 | __PRETTY_FUNCTION__, name, | |
784 | pim_str_sg_dump(sg)); | |
785 | } | |
12e41d03 | 786 | |
d62a17ae | 787 | return up; |
12e41d03 DL |
788 | } |
789 | ||
c8fc07cb DS |
790 | /* |
791 | * Passed in up must be the upstream for ch. starch is NULL if no | |
792 | * information | |
793 | */ | |
d62a17ae | 794 | int pim_upstream_evaluate_join_desired_interface(struct pim_upstream *up, |
795 | struct pim_ifchannel *ch, | |
796 | struct pim_ifchannel *starch) | |
7a3ddda5 | 797 | { |
d62a17ae | 798 | if (ch) { |
799 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
800 | return 0; | |
801 | ||
802 | if (!pim_macro_ch_lost_assert(ch) | |
803 | && pim_macro_chisin_joins_or_include(ch)) | |
804 | return 1; | |
805 | } | |
806 | ||
807 | /* | |
808 | * joins (*,G) | |
809 | */ | |
810 | if (starch) { | |
811 | if (PIM_IF_FLAG_TEST_S_G_RPT(starch->upstream->flags)) | |
812 | return 0; | |
813 | ||
814 | if (!pim_macro_ch_lost_assert(starch) | |
815 | && pim_macro_chisin_joins_or_include(starch)) | |
816 | return 1; | |
817 | } | |
818 | ||
819 | return 0; | |
7a3ddda5 DS |
820 | } |
821 | ||
12e41d03 DL |
822 | /* |
823 | Evaluate JoinDesired(S,G): | |
824 | ||
825 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
826 | in the set: | |
827 | ||
828 | inherited_olist(S,G) = | |
829 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
830 | ||
831 | JoinDesired(S,G) may be affected by changes in the following: | |
832 | ||
833 | pim_ifp->primary_address | |
834 | pim_ifp->pim_dr_addr | |
835 | ch->ifassert_winner_metric | |
836 | ch->ifassert_winner | |
d62a17ae | 837 | ch->local_ifmembership |
12e41d03 DL |
838 | ch->ifjoin_state |
839 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
840 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
841 | ch->upstream->rpf.source_nexthop.interface | |
842 | ||
843 | See also pim_upstream_update_join_desired() below. | |
844 | */ | |
845 | int pim_upstream_evaluate_join_desired(struct pim_upstream *up) | |
846 | { | |
d62a17ae | 847 | struct interface *ifp; |
848 | struct listnode *node; | |
849 | struct pim_ifchannel *ch, *starch; | |
850 | struct pim_upstream *starup = up->parent; | |
851 | int ret = 0; | |
12e41d03 | 852 | |
0708beb1 | 853 | for (ALL_LIST_ELEMENTS_RO(vrf_iflist(pimg->vrf_id), node, ifp)) { |
d62a17ae | 854 | if (!ifp->info) |
855 | continue; | |
c8fc07cb | 856 | |
d62a17ae | 857 | ch = pim_ifchannel_find(ifp, &up->sg); |
c8fc07cb | 858 | |
d62a17ae | 859 | if (starup) |
860 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
861 | else | |
862 | starch = NULL; | |
c8fc07cb | 863 | |
d62a17ae | 864 | if (!ch && !starch) |
865 | continue; | |
12e41d03 | 866 | |
d62a17ae | 867 | ret += pim_upstream_evaluate_join_desired_interface(up, ch, |
868 | starch); | |
869 | } /* scan iface channel list */ | |
12e41d03 | 870 | |
d62a17ae | 871 | return ret; /* false */ |
12e41d03 DL |
872 | } |
873 | ||
874 | /* | |
875 | See also pim_upstream_evaluate_join_desired() above. | |
876 | */ | |
877 | void pim_upstream_update_join_desired(struct pim_upstream *up) | |
878 | { | |
d62a17ae | 879 | int was_join_desired; /* boolean */ |
880 | int is_join_desired; /* boolean */ | |
881 | ||
882 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
883 | ||
884 | is_join_desired = pim_upstream_evaluate_join_desired(up); | |
885 | if (is_join_desired) | |
886 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
887 | else | |
888 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
889 | ||
890 | /* switched from false to true */ | |
891 | if (is_join_desired && !was_join_desired) { | |
892 | pim_upstream_switch(up, PIM_UPSTREAM_JOINED); | |
893 | return; | |
894 | } | |
895 | ||
896 | /* switched from true to false */ | |
897 | if (!is_join_desired && was_join_desired) { | |
898 | pim_upstream_switch(up, PIM_UPSTREAM_NOTJOINED); | |
899 | return; | |
900 | } | |
12e41d03 DL |
901 | } |
902 | ||
903 | /* | |
904 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
905 | Transitions from Joined State | |
906 | RPF'(S,G) GenID changes | |
907 | ||
908 | The upstream (S,G) state machine remains in Joined state. If the | |
909 | Join Timer is set to expire in more than t_override seconds, reset | |
910 | it so that it expires after t_override seconds. | |
911 | */ | |
912 | void pim_upstream_rpf_genid_changed(struct in_addr neigh_addr) | |
913 | { | |
d62a17ae | 914 | struct listnode *up_node; |
915 | struct listnode *up_nextnode; | |
916 | struct pim_upstream *up; | |
917 | ||
918 | /* | |
919 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
920 | */ | |
921 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) { | |
922 | ||
923 | if (PIM_DEBUG_TRACE) { | |
924 | char neigh_str[INET_ADDRSTRLEN]; | |
925 | char rpf_addr_str[PREFIX_STRLEN]; | |
926 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, | |
927 | sizeof(neigh_str)); | |
928 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, | |
929 | sizeof(rpf_addr_str)); | |
930 | zlog_debug( | |
931 | "%s: matching neigh=%s against upstream (S,G)=%s joined=%d rpf_addr=%s", | |
932 | __PRETTY_FUNCTION__, neigh_str, up->sg_str, | |
933 | up->join_state == PIM_UPSTREAM_JOINED, | |
934 | rpf_addr_str); | |
935 | } | |
936 | ||
937 | /* consider only (S,G) upstream in Joined state */ | |
938 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
939 | continue; | |
940 | ||
941 | /* match RPF'(S,G)=neigh_addr */ | |
942 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) | |
943 | continue; | |
944 | ||
945 | pim_upstream_join_timer_decrease_to_t_override( | |
946 | "RPF'(S,G) GenID change", up); | |
947 | } | |
12e41d03 DL |
948 | } |
949 | ||
950 | ||
951 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
952 | struct interface *old_rpf_ifp) | |
953 | { | |
d62a17ae | 954 | struct listnode *chnode; |
955 | struct listnode *chnextnode; | |
956 | struct pim_ifchannel *ch; | |
957 | ||
958 | /* search all ifchannels */ | |
959 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
960 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
961 | if ( | |
962 | /* RPF_interface(S) was NOT I */ | |
963 | (old_rpf_ifp == ch->interface) && | |
964 | /* RPF_interface(S) stopped being I */ | |
965 | (ch->upstream->rpf.source_nexthop | |
966 | .interface != ch->interface)) { | |
967 | assert_action_a5(ch); | |
968 | } | |
969 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
970 | ||
971 | pim_ifchannel_update_assert_tracking_desired(ch); | |
972 | } | |
12e41d03 DL |
973 | } |
974 | ||
975 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
976 | { | |
d62a17ae | 977 | struct listnode *chnode; |
978 | struct listnode *chnextnode; | |
979 | struct pim_ifchannel *ch; | |
980 | ||
981 | /* scan per-interface (S,G) state */ | |
982 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
983 | pim_ifchannel_update_could_assert(ch); | |
984 | } /* scan iface channel list */ | |
12e41d03 DL |
985 | } |
986 | ||
987 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
988 | { | |
d62a17ae | 989 | struct listnode *chnode; |
990 | struct listnode *chnextnode; | |
991 | struct pim_ifchannel *ch; | |
12e41d03 | 992 | |
d62a17ae | 993 | /* scan per-interface (S,G) state */ |
994 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
995 | pim_ifchannel_update_my_assert_metric(ch); | |
12e41d03 | 996 | |
d62a17ae | 997 | } /* scan iface channel list */ |
12e41d03 DL |
998 | } |
999 | ||
1000 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
1001 | { | |
d62a17ae | 1002 | struct listnode *chnode; |
1003 | struct listnode *chnextnode; | |
1004 | struct pim_interface *pim_ifp; | |
1005 | struct pim_ifchannel *ch; | |
1006 | ||
1007 | /* scan per-interface (S,G) state */ | |
1008 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1009 | if (!ch->interface) | |
1010 | continue; | |
1011 | pim_ifp = ch->interface->info; | |
1012 | if (!pim_ifp) | |
1013 | continue; | |
1014 | ||
1015 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1016 | ||
1017 | } /* scan iface channel list */ | |
12e41d03 | 1018 | } |
f14248dd | 1019 | |
1bf16443 | 1020 | /* When kat is stopped CouldRegister goes to false so we need to |
1021 | * transition the (S, G) on FHR to NI state and remove reg tunnel | |
1022 | * from the OIL */ | |
1023 | static void pim_upstream_fhr_kat_expiry(struct pim_upstream *up) | |
1024 | { | |
d62a17ae | 1025 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
1026 | return; | |
1027 | ||
1028 | if (PIM_DEBUG_TRACE) | |
1029 | zlog_debug("kat expired on %s; clear fhr reg state", | |
1030 | up->sg_str); | |
1031 | ||
1032 | /* stop reg-stop timer */ | |
1033 | THREAD_OFF(up->t_rs_timer); | |
1034 | /* remove regiface from the OIL if it is there*/ | |
1035 | pim_channel_del_oif(up->channel_oil, pim_regiface, | |
1036 | PIM_OIF_FLAG_PROTO_PIM); | |
1037 | /* clear the register state */ | |
1038 | up->reg_state = PIM_REG_NOINFO; | |
1039 | PIM_UPSTREAM_FLAG_UNSET_FHR(up->flags); | |
1bf16443 | 1040 | } |
1041 | ||
1042 | /* When kat is started CouldRegister can go to true. And if it does we | |
1043 | * need to transition the (S, G) on FHR to JOINED state and add reg tunnel | |
1044 | * to the OIL */ | |
1045 | static void pim_upstream_fhr_kat_start(struct pim_upstream *up) | |
1046 | { | |
d62a17ae | 1047 | if (pim_upstream_could_register(up)) { |
1048 | if (PIM_DEBUG_TRACE) | |
1049 | zlog_debug( | |
1050 | "kat started on %s; set fhr reg state to joined", | |
1051 | up->sg_str); | |
1052 | ||
1053 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
1054 | if (up->reg_state == PIM_REG_NOINFO) | |
1055 | pim_register_join(up); | |
1056 | } | |
1bf16443 | 1057 | } |
1058 | ||
f14248dd DS |
1059 | /* |
1060 | * On an RP, the PMBR value must be cleared when the | |
1061 | * Keepalive Timer expires | |
1bf16443 | 1062 | * KAT expiry indicates that flow is inactive. If the flow was created or |
1063 | * maintained by activity now is the time to deref it. | |
f14248dd | 1064 | */ |
d62a17ae | 1065 | static int pim_upstream_keep_alive_timer(struct thread *t) |
f14248dd | 1066 | { |
d62a17ae | 1067 | struct pim_upstream *up; |
1068 | ||
1069 | up = THREAD_ARG(t); | |
1070 | ||
1071 | if (I_am_RP(up->sg.grp)) { | |
1072 | pim_br_clear_pmbr(&up->sg); | |
1073 | /* | |
1074 | * We need to do more here :) | |
1075 | * But this is the start. | |
1076 | */ | |
1077 | } | |
1078 | ||
1079 | /* source is no longer active - pull the SA from MSDP's cache */ | |
1080 | pim_msdp_sa_local_del(&up->sg); | |
1081 | ||
1082 | /* if entry was created because of activity we need to deref it */ | |
1083 | if (PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
1084 | pim_upstream_fhr_kat_expiry(up); | |
1085 | if (PIM_DEBUG_TRACE) | |
1086 | zlog_debug("kat expired on %s; remove stream reference", | |
1087 | up->sg_str); | |
1088 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(up->flags); | |
1089 | pim_upstream_del(up, __PRETTY_FUNCTION__); | |
1090 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) { | |
1091 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(up->flags); | |
1092 | pim_upstream_del(up, __PRETTY_FUNCTION__); | |
1093 | } | |
1094 | ||
1095 | return 0; | |
f14248dd DS |
1096 | } |
1097 | ||
d62a17ae | 1098 | void pim_upstream_keep_alive_timer_start(struct pim_upstream *up, uint32_t time) |
f14248dd | 1099 | { |
d62a17ae | 1100 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { |
1101 | if (PIM_DEBUG_TRACE) | |
1102 | zlog_debug("kat start on %s with no stream reference", | |
1103 | up->sg_str); | |
1104 | } | |
1105 | THREAD_OFF(up->t_ka_timer); | |
1106 | thread_add_timer(master, pim_upstream_keep_alive_timer, up, time, | |
1107 | &up->t_ka_timer); | |
1108 | ||
1109 | /* any time keepalive is started against a SG we will have to | |
1110 | * re-evaluate our active source database */ | |
1111 | pim_msdp_sa_local_update(up); | |
1bf16443 | 1112 | } |
1113 | ||
1114 | /* MSDP on RP needs to know if a source is registerable to this RP */ | |
d62a17ae | 1115 | static int pim_upstream_msdp_reg_timer(struct thread *t) |
1bf16443 | 1116 | { |
d62a17ae | 1117 | struct pim_upstream *up; |
1bf16443 | 1118 | |
d62a17ae | 1119 | up = THREAD_ARG(t); |
1bf16443 | 1120 | |
d62a17ae | 1121 | /* source is no longer active - pull the SA from MSDP's cache */ |
1122 | pim_msdp_sa_local_del(&up->sg); | |
1123 | return 1; | |
1bf16443 | 1124 | } |
d62a17ae | 1125 | void pim_upstream_msdp_reg_timer_start(struct pim_upstream *up) |
1bf16443 | 1126 | { |
d62a17ae | 1127 | THREAD_OFF(up->t_msdp_reg_timer); |
1128 | thread_add_timer(master, pim_upstream_msdp_reg_timer, up, | |
1129 | PIM_MSDP_REG_RXED_PERIOD, &up->t_msdp_reg_timer); | |
1bf16443 | 1130 | |
d62a17ae | 1131 | pim_msdp_sa_local_update(up); |
f14248dd | 1132 | } |
cb40b272 DS |
1133 | |
1134 | /* | |
1135 | * 4.2.1 Last-Hop Switchover to the SPT | |
1136 | * | |
1137 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
1138 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
1139 | * router, it has the option of switching to receive the traffic on a | |
1140 | * shortest path tree (SPT). | |
1141 | * | |
1142 | * The decision for a router to switch to the SPT is controlled as | |
1143 | * follows: | |
1144 | * | |
1145 | * void | |
1146 | * CheckSwitchToSpt(S,G) { | |
1147 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
1148 | * (+) pim_include(S,G) != NULL ) | |
1149 | * AND SwitchToSptDesired(S,G) ) { | |
1150 | * # Note: Restarting the KAT will result in the SPT switch | |
1151 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1152 | * } | |
1153 | * } | |
1154 | * | |
1155 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
1156 | * defined. An "infinite threshold" policy can be implemented by making | |
1157 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
1158 | * first packet" policy can be implemented by making | |
1159 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
1160 | * received for the source and group. | |
1161 | */ | |
d62a17ae | 1162 | int pim_upstream_switch_to_spt_desired(struct prefix_sg *sg) |
cb40b272 | 1163 | { |
d62a17ae | 1164 | if (I_am_RP(sg->grp)) |
1165 | return 1; | |
a3b58b4a | 1166 | |
d62a17ae | 1167 | return 0; |
cb40b272 | 1168 | } |
d7259eac | 1169 | |
d62a17ae | 1170 | int pim_upstream_is_sg_rpt(struct pim_upstream *up) |
80d9c3a0 | 1171 | { |
d62a17ae | 1172 | struct listnode *chnode; |
1173 | struct pim_ifchannel *ch; | |
f21597f0 | 1174 | |
d62a17ae | 1175 | for (ALL_LIST_ELEMENTS_RO(up->ifchannels, chnode, ch)) { |
1176 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
1177 | return 1; | |
1178 | } | |
e43b8697 | 1179 | |
d62a17ae | 1180 | return 0; |
80d9c3a0 | 1181 | } |
3a66b17b DS |
1182 | /* |
1183 | * After receiving a packet set SPTbit: | |
1184 | * void | |
1185 | * Update_SPTbit(S,G,iif) { | |
1186 | * if ( iif == RPF_interface(S) | |
1187 | * AND JoinDesired(S,G) == TRUE | |
1188 | * AND ( DirectlyConnected(S) == TRUE | |
1189 | * OR RPF_interface(S) != RPF_interface(RP(G)) | |
1190 | * OR inherited_olist(S,G,rpt) == NULL | |
1191 | * OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1192 | * ( RPF'(S,G) != NULL ) ) | |
1193 | * OR ( I_Am_Assert_Loser(S,G,iif) ) { | |
1194 | * Set SPTbit(S,G) to TRUE | |
1195 | * } | |
1196 | * } | |
1197 | */ | |
d62a17ae | 1198 | void pim_upstream_set_sptbit(struct pim_upstream *up, |
1199 | struct interface *incoming) | |
3a66b17b | 1200 | { |
d62a17ae | 1201 | struct pim_upstream *starup = up->parent; |
1202 | ||
1203 | // iif == RPF_interfvace(S) | |
1204 | if (up->rpf.source_nexthop.interface != incoming) { | |
1205 | if (PIM_DEBUG_TRACE) | |
1206 | zlog_debug( | |
1207 | "%s: Incoming Interface: %s is different than RPF_interface(S) %s", | |
1208 | __PRETTY_FUNCTION__, incoming->name, | |
1209 | up->rpf.source_nexthop.interface->name); | |
1210 | return; | |
1211 | } | |
1212 | ||
1213 | // AND JoinDesired(S,G) == TRUE | |
1214 | // FIXME | |
1215 | ||
1216 | // DirectlyConnected(S) == TRUE | |
1217 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1218 | up->sg.src)) { | |
1219 | if (PIM_DEBUG_TRACE) | |
1220 | zlog_debug("%s: %s is directly connected to the source", | |
1221 | __PRETTY_FUNCTION__, up->sg_str); | |
1222 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1223 | return; | |
1224 | } | |
1225 | ||
1226 | // OR RPF_interface(S) != RPF_interface(RP(G)) | |
1227 | if (!starup | |
1228 | || up->rpf.source_nexthop | |
1229 | .interface != starup->rpf.source_nexthop.interface) { | |
1230 | if (PIM_DEBUG_TRACE) | |
1231 | zlog_debug( | |
1232 | "%s: %s RPF_interface(S) != RPF_interface(RP(G))", | |
1233 | __PRETTY_FUNCTION__, up->sg_str); | |
1234 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1235 | return; | |
1236 | } | |
1237 | ||
1238 | // OR inherited_olist(S,G,rpt) == NULL | |
1239 | if (pim_upstream_is_sg_rpt(up) | |
1240 | && pim_upstream_empty_inherited_olist(up)) { | |
1241 | if (PIM_DEBUG_TRACE) | |
1242 | zlog_debug("%s: %s OR inherited_olist(S,G,rpt) == NULL", | |
1243 | __PRETTY_FUNCTION__, up->sg_str); | |
1244 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1245 | return; | |
1246 | } | |
1247 | ||
1248 | // OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1249 | // ( RPF'(S,G) != NULL ) ) | |
1250 | if (up->parent && pim_rpf_is_same(&up->rpf, &up->parent->rpf)) { | |
1251 | if (PIM_DEBUG_TRACE) | |
1252 | zlog_debug("%s: %s RPF'(S,G) is the same as RPF'(*,G)", | |
1253 | __PRETTY_FUNCTION__, up->sg_str); | |
1254 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1255 | return; | |
1256 | } | |
1257 | ||
1258 | return; | |
3a66b17b | 1259 | } |
80d9c3a0 | 1260 | |
d62a17ae | 1261 | const char *pim_upstream_state2str(enum pim_upstream_state join_state) |
d7259eac | 1262 | { |
d62a17ae | 1263 | switch (join_state) { |
1264 | case PIM_UPSTREAM_NOTJOINED: | |
1265 | return "NotJoined"; | |
1266 | break; | |
1267 | case PIM_UPSTREAM_JOINED: | |
1268 | return "Joined"; | |
1269 | break; | |
1270 | } | |
1271 | return "Unknown"; | |
d7259eac | 1272 | } |
627ed2a3 | 1273 | |
d62a17ae | 1274 | const char *pim_reg_state2str(enum pim_reg_state reg_state, char *state_str) |
e0e127b0 | 1275 | { |
d62a17ae | 1276 | switch (reg_state) { |
1277 | case PIM_REG_NOINFO: | |
1278 | strcpy(state_str, "RegNoInfo"); | |
1279 | break; | |
1280 | case PIM_REG_JOIN: | |
1281 | strcpy(state_str, "RegJoined"); | |
1282 | break; | |
1283 | case PIM_REG_JOIN_PENDING: | |
1284 | strcpy(state_str, "RegJoinPend"); | |
1285 | break; | |
1286 | case PIM_REG_PRUNE: | |
1287 | strcpy(state_str, "RegPrune"); | |
1288 | break; | |
1289 | default: | |
1290 | strcpy(state_str, "RegUnknown"); | |
1291 | } | |
1292 | return state_str; | |
e0e127b0 | 1293 | } |
1294 | ||
d62a17ae | 1295 | static int pim_upstream_register_stop_timer(struct thread *t) |
627ed2a3 | 1296 | { |
d62a17ae | 1297 | struct pim_interface *pim_ifp; |
1298 | struct pim_upstream *up; | |
1299 | struct pim_rpf *rpg; | |
1300 | struct ip ip_hdr; | |
1301 | up = THREAD_ARG(t); | |
1302 | ||
1303 | if (PIM_DEBUG_TRACE) { | |
1304 | char state_str[PIM_REG_STATE_STR_LEN]; | |
1305 | zlog_debug("%s: (S,G)=%s upstream register stop timer %s", | |
1306 | __PRETTY_FUNCTION__, up->sg_str, | |
1307 | pim_reg_state2str(up->reg_state, state_str)); | |
1308 | } | |
1309 | ||
1310 | switch (up->reg_state) { | |
1311 | case PIM_REG_JOIN_PENDING: | |
1312 | up->reg_state = PIM_REG_JOIN; | |
1313 | pim_channel_add_oif(up->channel_oil, pim_regiface, | |
1314 | PIM_OIF_FLAG_PROTO_PIM); | |
1315 | break; | |
1316 | case PIM_REG_JOIN: | |
1317 | break; | |
1318 | case PIM_REG_PRUNE: | |
1319 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
1320 | if (!pim_ifp) { | |
1321 | if (PIM_DEBUG_TRACE) | |
1322 | zlog_debug( | |
1323 | "%s: Interface: %s is not configured for pim", | |
1324 | __PRETTY_FUNCTION__, | |
1325 | up->rpf.source_nexthop.interface->name); | |
1326 | return 0; | |
1327 | } | |
1328 | up->reg_state = PIM_REG_JOIN_PENDING; | |
1329 | pim_upstream_start_register_stop_timer(up, 1); | |
1330 | ||
1331 | if (((up->channel_oil->cc.lastused / 100) | |
1332 | > PIM_KEEPALIVE_PERIOD) | |
1333 | && (I_am_RP(up->sg.grp))) { | |
1334 | if (PIM_DEBUG_TRACE) | |
1335 | zlog_debug( | |
1336 | "%s: Stop sending the register, because I am the RP and we haven't seen a packet in a while", | |
1337 | __PRETTY_FUNCTION__); | |
1338 | return 0; | |
1339 | } | |
1340 | rpg = RP(up->sg.grp); | |
1341 | memset(&ip_hdr, 0, sizeof(struct ip)); | |
1342 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
1343 | ip_hdr.ip_hl = 5; | |
1344 | ip_hdr.ip_v = 4; | |
1345 | ip_hdr.ip_src = up->sg.src; | |
1346 | ip_hdr.ip_dst = up->sg.grp; | |
1347 | ip_hdr.ip_len = htons(20); | |
1348 | // checksum is broken | |
1349 | pim_register_send((uint8_t *)&ip_hdr, sizeof(struct ip), | |
1350 | pim_ifp->primary_address, rpg, 1, up); | |
1351 | break; | |
1352 | default: | |
1353 | break; | |
70e7fda8 | 1354 | } |
d62a17ae | 1355 | |
1356 | return 0; | |
627ed2a3 DS |
1357 | } |
1358 | ||
d62a17ae | 1359 | void pim_upstream_start_register_stop_timer(struct pim_upstream *up, |
1360 | int null_register) | |
627ed2a3 | 1361 | { |
d62a17ae | 1362 | uint32_t time; |
1363 | ||
1364 | THREAD_TIMER_OFF(up->t_rs_timer); | |
1365 | ||
1366 | if (!null_register) { | |
1367 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1368 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1369 | time = lower + (random() % (upper - lower + 1)) | |
1370 | - PIM_REGISTER_PROBE_PERIOD; | |
1371 | } else | |
1372 | time = PIM_REGISTER_PROBE_PERIOD; | |
1373 | ||
1374 | if (PIM_DEBUG_TRACE) { | |
1375 | zlog_debug( | |
1376 | "%s: (S,G)=%s Starting upstream register stop timer %d", | |
1377 | __PRETTY_FUNCTION__, up->sg_str, time); | |
1378 | } | |
1379 | thread_add_timer(master, pim_upstream_register_stop_timer, up, time, | |
1380 | &up->t_rs_timer); | |
627ed2a3 | 1381 | } |
4fdc8f36 | 1382 | |
d62a17ae | 1383 | int pim_upstream_inherited_olist_decide(struct pim_upstream *up) |
4fdc8f36 | 1384 | { |
d62a17ae | 1385 | struct interface *ifp; |
1386 | struct pim_interface *pim_ifp = NULL; | |
1387 | struct pim_ifchannel *ch, *starch; | |
1388 | struct listnode *node; | |
1389 | struct pim_upstream *starup = up->parent; | |
1390 | int output_intf = 0; | |
1391 | ||
1392 | if (up->rpf.source_nexthop.interface) | |
1393 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
1394 | else { | |
1395 | if (PIM_DEBUG_TRACE) | |
1396 | zlog_debug("%s: up %s RPF is not present", | |
1397 | __PRETTY_FUNCTION__, up->sg_str); | |
1398 | } | |
1399 | if (pim_ifp && !up->channel_oil) | |
1400 | up->channel_oil = | |
1401 | pim_channel_oil_add(&up->sg, pim_ifp->mroute_vif_index); | |
1402 | ||
0708beb1 | 1403 | for (ALL_LIST_ELEMENTS_RO(vrf_iflist(pimg->vrf_id), node, ifp)) { |
d62a17ae | 1404 | if (!ifp->info) |
1405 | continue; | |
1406 | ||
1407 | ch = pim_ifchannel_find(ifp, &up->sg); | |
1408 | ||
1409 | if (starup) | |
1410 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
1411 | else | |
1412 | starch = NULL; | |
1413 | ||
1414 | if (!ch && !starch) | |
1415 | continue; | |
1416 | ||
1417 | if (pim_upstream_evaluate_join_desired_interface(up, ch, | |
1418 | starch)) { | |
1419 | int flag = PIM_OIF_FLAG_PROTO_PIM; | |
1420 | ||
1421 | if (!ch) | |
1422 | flag = PIM_OIF_FLAG_PROTO_STAR; | |
1423 | ||
1424 | pim_channel_add_oif(up->channel_oil, ifp, flag); | |
1425 | output_intf++; | |
1426 | } | |
1427 | } | |
1428 | ||
1429 | return output_intf; | |
b5183fd1 DS |
1430 | } |
1431 | ||
1432 | /* | |
1433 | * For a given upstream, determine the inherited_olist | |
1434 | * and apply it. | |
1435 | * | |
1436 | * inherited_olist(S,G,rpt) = | |
1437 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1438 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1439 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1440 | * | |
1441 | * inherited_olist(S,G) = | |
1442 | * inherited_olist(S,G,rpt) (+) | |
1443 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1444 | * | |
1445 | * return 1 if there are any output interfaces | |
1446 | * return 0 if there are not any output interfaces | |
1447 | */ | |
d62a17ae | 1448 | int pim_upstream_inherited_olist(struct pim_upstream *up) |
b5183fd1 | 1449 | { |
d62a17ae | 1450 | int output_intf = pim_upstream_inherited_olist_decide(up); |
1451 | ||
1452 | /* | |
1453 | * If we have output_intf switch state to Join and work like normal | |
1454 | * If we don't have an output_intf that means we are probably a | |
1455 | * switch on a stick so turn on forwarding to just accept the | |
1456 | * incoming packets so we don't bother the other stuff! | |
1457 | */ | |
1458 | if (output_intf) | |
1459 | pim_upstream_switch(up, PIM_UPSTREAM_JOINED); | |
1460 | else | |
1461 | forward_on(up); | |
1462 | ||
1463 | return output_intf; | |
4fdc8f36 | 1464 | } |
d3dd1804 | 1465 | |
d62a17ae | 1466 | int pim_upstream_empty_inherited_olist(struct pim_upstream *up) |
80d9c3a0 | 1467 | { |
d62a17ae | 1468 | return pim_channel_oil_empty(up->channel_oil); |
80d9c3a0 DS |
1469 | } |
1470 | ||
d3dd1804 DS |
1471 | /* |
1472 | * When we have a new neighbor, | |
1473 | * find upstreams that don't have their rpf_addr | |
1474 | * set and see if the new neighbor allows | |
1475 | * the join to be sent | |
1476 | */ | |
d62a17ae | 1477 | void pim_upstream_find_new_rpf(void) |
d3dd1804 | 1478 | { |
d62a17ae | 1479 | struct listnode *up_node; |
1480 | struct listnode *up_nextnode; | |
1481 | struct pim_upstream *up; | |
1482 | ||
1483 | /* | |
1484 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
1485 | */ | |
1486 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) { | |
1487 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
1488 | if (PIM_DEBUG_TRACE) | |
1489 | zlog_debug( | |
1490 | "Upstream %s without a path to send join, checking", | |
1491 | up->sg_str); | |
1492 | pim_rpf_update(up, NULL, 1); | |
1493 | } | |
d3dd1804 | 1494 | } |
d3dd1804 | 1495 | } |
0f588989 | 1496 | |
d62a17ae | 1497 | static unsigned int pim_upstream_hash_key(void *arg) |
0f588989 | 1498 | { |
d62a17ae | 1499 | struct pim_upstream *up = (struct pim_upstream *)arg; |
0f588989 | 1500 | |
d62a17ae | 1501 | return jhash_2words(up->sg.src.s_addr, up->sg.grp.s_addr, 0); |
0f588989 DS |
1502 | } |
1503 | ||
d62a17ae | 1504 | void pim_upstream_terminate(void) |
0f588989 | 1505 | { |
d62a17ae | 1506 | if (pim_upstream_list) |
1507 | list_delete(pim_upstream_list); | |
1508 | pim_upstream_list = NULL; | |
0f588989 | 1509 | |
d62a17ae | 1510 | if (pim_upstream_hash) |
1511 | hash_free(pim_upstream_hash); | |
1512 | pim_upstream_hash = NULL; | |
0f588989 DS |
1513 | } |
1514 | ||
d62a17ae | 1515 | static int pim_upstream_equal(const void *arg1, const void *arg2) |
0f588989 | 1516 | { |
d62a17ae | 1517 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
1518 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
0f588989 | 1519 | |
d62a17ae | 1520 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) |
1521 | && (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
1522 | return 1; | |
0f588989 | 1523 | |
d62a17ae | 1524 | return 0; |
0f588989 DS |
1525 | } |
1526 | ||
1bf16443 | 1527 | /* rfc4601:section-4.2:"Data Packet Forwarding Rules" defines |
1528 | * the cases where kat has to be restarted on rxing traffic - | |
1529 | * | |
1530 | * if( DirectlyConnected(S) == TRUE AND iif == RPF_interface(S) ) { | |
1531 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1532 | * # Note: a register state transition or UpstreamJPState(S,G) | |
1533 | * # transition may happen as a result of restarting | |
1534 | * # KeepaliveTimer, and must be dealt with here. | |
1535 | * } | |
1536 | * if( iif == RPF_interface(S) AND UpstreamJPState(S,G) == Joined AND | |
1537 | * inherited_olist(S,G) != NULL ) { | |
1538 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1539 | * } | |
1540 | */ | |
1541 | static bool pim_upstream_kat_start_ok(struct pim_upstream *up) | |
1542 | { | |
d62a17ae | 1543 | /* "iif == RPF_interface(S)" check has to be done by the kernel or hw |
1544 | * so we will skip that here */ | |
1545 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1546 | up->sg.src)) { | |
1547 | return true; | |
1548 | } | |
1549 | ||
1550 | if ((up->join_state == PIM_UPSTREAM_JOINED) | |
1551 | && !pim_upstream_empty_inherited_olist(up)) { | |
1552 | /* XXX: I have added this RP check just for 3.2 and it's a | |
1553 | * digression from | |
1554 | * what rfc-4601 says. Till now we were only running KAT on FHR | |
1555 | * and RP and | |
1556 | * there is some angst around making the change to run it all | |
1557 | * routers that | |
1558 | * maintain the (S, G) state. This is tracked via CM-13601 and | |
1559 | * MUST be | |
1560 | * removed to handle spt turn-arounds correctly in a 3-tier clos | |
1561 | */ | |
1562 | if (I_am_RP(up->sg.grp)) | |
1563 | return true; | |
1564 | } | |
1565 | ||
1566 | return false; | |
1bf16443 | 1567 | } |
1568 | ||
9c5e4d62 DS |
1569 | /* |
1570 | * Code to check and see if we've received packets on a S,G mroute | |
1571 | * and if so to set the SPT bit appropriately | |
1572 | */ | |
d62a17ae | 1573 | static void pim_upstream_sg_running(void *arg) |
9c5e4d62 | 1574 | { |
d62a17ae | 1575 | struct pim_upstream *up = (struct pim_upstream *)arg; |
1576 | ||
1577 | // No packet can have arrived here if this is the case | |
1578 | if (!up->channel_oil || !up->channel_oil->installed) { | |
1579 | if (PIM_DEBUG_TRACE) | |
1580 | zlog_debug("%s: %s is not installed in mroute", | |
1581 | __PRETTY_FUNCTION__, up->sg_str); | |
1582 | return; | |
1583 | } | |
1584 | ||
1585 | /* | |
1586 | * This is a bit of a hack | |
1587 | * We've noted that we should rescan but | |
1588 | * we've missed the window for doing so in | |
1589 | * pim_zebra.c for some reason. I am | |
1590 | * only doing this at this point in time | |
1591 | * to get us up and working for the moment | |
1592 | */ | |
1593 | if (up->channel_oil->oil_inherited_rescan) { | |
1594 | if (PIM_DEBUG_TRACE) | |
1595 | zlog_debug( | |
1596 | "%s: Handling unscanned inherited_olist for %s", | |
1597 | __PRETTY_FUNCTION__, up->sg_str); | |
1598 | pim_upstream_inherited_olist_decide(up); | |
1599 | up->channel_oil->oil_inherited_rescan = 0; | |
1600 | } | |
1601 | pim_mroute_update_counters(up->channel_oil); | |
1602 | ||
1603 | // Have we seen packets? | |
1604 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) | |
1605 | && (up->channel_oil->cc.lastused / 100 > 30)) { | |
1606 | if (PIM_DEBUG_TRACE) { | |
1607 | zlog_debug( | |
1608 | "%s: %s old packet count is equal or lastused is greater than 30, (%ld,%ld,%lld)", | |
1609 | __PRETTY_FUNCTION__, up->sg_str, | |
1610 | up->channel_oil->cc.oldpktcnt, | |
1611 | up->channel_oil->cc.pktcnt, | |
1612 | up->channel_oil->cc.lastused / 100); | |
1613 | } | |
1614 | return; | |
e43b8697 | 1615 | } |
d62a17ae | 1616 | |
1617 | if (pim_upstream_kat_start_ok(up)) { | |
1618 | /* Add a source reference to the stream if | |
1619 | * one doesn't already exist */ | |
1620 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
1621 | if (PIM_DEBUG_TRACE) | |
1622 | zlog_debug( | |
1623 | "source reference created on kat restart %s", | |
1624 | up->sg_str); | |
1625 | ||
1626 | pim_upstream_ref(up, PIM_UPSTREAM_FLAG_MASK_SRC_STREAM, | |
1627 | __PRETTY_FUNCTION__); | |
1628 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); | |
1629 | pim_upstream_fhr_kat_start(up); | |
1630 | } | |
1631 | pim_upstream_keep_alive_timer_start(up, qpim_keep_alive_time); | |
1632 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) | |
1633 | pim_upstream_keep_alive_timer_start(up, qpim_keep_alive_time); | |
1634 | ||
1635 | if (up->sptbit != PIM_UPSTREAM_SPTBIT_TRUE) { | |
1636 | pim_upstream_set_sptbit(up, up->rpf.source_nexthop.interface); | |
850a9f99 | 1637 | } |
d62a17ae | 1638 | return; |
9c5e4d62 DS |
1639 | } |
1640 | ||
d62a17ae | 1641 | void pim_upstream_add_lhr_star_pimreg(void) |
a7b2b1e2 | 1642 | { |
d62a17ae | 1643 | struct pim_upstream *up; |
1644 | struct listnode *node; | |
a7b2b1e2 | 1645 | |
d62a17ae | 1646 | for (ALL_LIST_ELEMENTS_RO(pim_upstream_list, node, up)) { |
1647 | if (up->sg.src.s_addr != INADDR_ANY) | |
1648 | continue; | |
a7b2b1e2 | 1649 | |
d62a17ae | 1650 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) |
1651 | continue; | |
a7b2b1e2 | 1652 | |
d62a17ae | 1653 | pim_channel_add_oif(up->channel_oil, pim_regiface, |
1654 | PIM_OIF_FLAG_PROTO_IGMP); | |
1655 | } | |
a7b2b1e2 DS |
1656 | } |
1657 | ||
d62a17ae | 1658 | void pim_upstream_spt_prefix_list_update(struct prefix_list *pl) |
df94f9a9 | 1659 | { |
d62a17ae | 1660 | const char *pname = prefix_list_name(pl); |
df94f9a9 | 1661 | |
d62a17ae | 1662 | if (pimg->spt.plist && strcmp(pimg->spt.plist, pname) == 0) { |
1663 | pim_upstream_remove_lhr_star_pimreg(pname); | |
1664 | } | |
df94f9a9 DS |
1665 | } |
1666 | ||
1667 | /* | |
1668 | * nlist -> The new prefix list | |
1669 | * | |
1670 | * Per Group Application of pimreg to the OIL | |
1671 | * If the prefix list tells us DENY then | |
1672 | * we need to Switchover to SPT immediate | |
1673 | * so add the pimreg. | |
1674 | * If the prefix list tells us to ACCEPT than | |
1675 | * we need to Never do the SPT so remove | |
1676 | * the interface | |
1677 | * | |
1678 | */ | |
d62a17ae | 1679 | void pim_upstream_remove_lhr_star_pimreg(const char *nlist) |
a7b2b1e2 | 1680 | { |
d62a17ae | 1681 | struct pim_upstream *up; |
1682 | struct listnode *node; | |
1683 | struct prefix_list *np; | |
1684 | struct prefix g; | |
1685 | enum prefix_list_type apply_new; | |
1686 | ||
1687 | np = prefix_list_lookup(AFI_IP, nlist); | |
1688 | ||
1689 | g.family = AF_INET; | |
1690 | g.prefixlen = IPV4_MAX_PREFIXLEN; | |
1691 | ||
1692 | for (ALL_LIST_ELEMENTS_RO(pim_upstream_list, node, up)) { | |
1693 | if (up->sg.src.s_addr != INADDR_ANY) | |
1694 | continue; | |
1695 | ||
1696 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) | |
1697 | continue; | |
1698 | ||
1699 | if (!nlist) { | |
1700 | pim_channel_del_oif(up->channel_oil, pim_regiface, | |
1701 | PIM_OIF_FLAG_PROTO_IGMP); | |
1702 | continue; | |
1703 | } | |
1704 | g.u.prefix4 = up->sg.grp; | |
1705 | apply_new = prefix_list_apply(np, &g); | |
1706 | if (apply_new == PREFIX_DENY) | |
1707 | pim_channel_add_oif(up->channel_oil, pim_regiface, | |
1708 | PIM_OIF_FLAG_PROTO_IGMP); | |
1709 | else | |
1710 | pim_channel_del_oif(up->channel_oil, pim_regiface, | |
1711 | PIM_OIF_FLAG_PROTO_IGMP); | |
1712 | } | |
a7b2b1e2 DS |
1713 | } |
1714 | ||
d62a17ae | 1715 | void pim_upstream_init(void) |
0f588989 | 1716 | { |
d62a17ae | 1717 | pim_upstream_sg_wheel = |
1718 | wheel_init(master, 31000, 100, pim_upstream_hash_key, | |
1719 | pim_upstream_sg_running); | |
1720 | pim_upstream_hash = hash_create_size(8192, pim_upstream_hash_key, | |
1721 | pim_upstream_equal, NULL); | |
1722 | ||
1723 | pim_upstream_list = list_new(); | |
1724 | pim_upstream_list->del = (void (*)(void *))pim_upstream_free; | |
1725 | pim_upstream_list->cmp = pim_upstream_compare; | |
0f588989 | 1726 | } |