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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 | |
982bff89 | 57 | static void join_timer_stop(struct pim_upstream *up); |
d62a17ae | 58 | static void |
59 | pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); | |
12e41d03 | 60 | |
cfa91a87 DS |
61 | /* |
62 | * A (*,G) or a (*,*) is going away | |
63 | * remove the parent pointer from | |
64 | * those pointing at us | |
65 | */ | |
9b29ea95 DS |
66 | static void pim_upstream_remove_children(struct pim_instance *pim, |
67 | struct pim_upstream *up) | |
cfa91a87 | 68 | { |
d62a17ae | 69 | struct pim_upstream *child; |
70 | ||
71 | if (!up->sources) | |
72 | return; | |
73 | ||
74 | while (!list_isempty(up->sources)) { | |
75 | child = listnode_head(up->sources); | |
76 | listnode_delete(up->sources, child); | |
77 | if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(child->flags)) { | |
78 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(child->flags); | |
9b29ea95 DS |
79 | child = pim_upstream_del(pim, child, |
80 | __PRETTY_FUNCTION__); | |
d62a17ae | 81 | } |
82 | if (child) | |
83 | child->parent = NULL; | |
84 | } | |
85 | list_delete(up->sources); | |
86 | up->sources = NULL; | |
cfa91a87 DS |
87 | } |
88 | ||
89 | /* | |
90 | * A (*,G) or a (*,*) is being created | |
91 | * Find the children that would point | |
92 | * at us. | |
93 | */ | |
9b29ea95 DS |
94 | static void pim_upstream_find_new_children(struct pim_instance *pim, |
95 | struct pim_upstream *up) | |
cfa91a87 | 96 | { |
d62a17ae | 97 | struct pim_upstream *child; |
98 | struct listnode *ch_node; | |
99 | ||
100 | if ((up->sg.src.s_addr != INADDR_ANY) | |
101 | && (up->sg.grp.s_addr != INADDR_ANY)) | |
102 | return; | |
103 | ||
104 | if ((up->sg.src.s_addr == INADDR_ANY) | |
105 | && (up->sg.grp.s_addr == INADDR_ANY)) | |
106 | return; | |
107 | ||
9b29ea95 | 108 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, ch_node, child)) { |
d62a17ae | 109 | if ((up->sg.grp.s_addr != INADDR_ANY) |
110 | && (child->sg.grp.s_addr == up->sg.grp.s_addr) | |
111 | && (child != up)) { | |
112 | child->parent = up; | |
113 | listnode_add_sort(up->sources, child); | |
114 | } | |
03417ccd | 115 | } |
cfa91a87 DS |
116 | } |
117 | ||
4d99418b DS |
118 | /* |
119 | * If we have a (*,*) || (S,*) there is no parent | |
120 | * If we have a (S,G), find the (*,G) | |
121 | * If we have a (*,G), find the (*,*) | |
122 | */ | |
9b29ea95 DS |
123 | static struct pim_upstream *pim_upstream_find_parent(struct pim_instance *pim, |
124 | 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; | |
9b29ea95 | 133 | up = pim_upstream_find(pim, &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 | */ | |
13221cf2 | 156 | up->channel_oil->up = NULL; |
d62a17ae | 157 | pim_channel_oil_del(up->channel_oil); |
158 | up->channel_oil = NULL; | |
159 | } | |
12e41d03 DL |
160 | } |
161 | ||
9b29ea95 DS |
162 | struct pim_upstream *pim_upstream_del(struct pim_instance *pim, |
163 | struct pim_upstream *up, const char *name) | |
12e41d03 | 164 | { |
d62a17ae | 165 | bool notify_msdp = false; |
166 | struct prefix nht_p; | |
167 | ||
168 | if (PIM_DEBUG_TRACE) | |
169 | zlog_debug( | |
170 | "%s(%s): Delete %s ref count: %d , flags: %d c_oil ref count %d (Pre decrement)", | |
171 | __PRETTY_FUNCTION__, name, up->sg_str, up->ref_count, | |
172 | up->flags, up->channel_oil->oil_ref_count); | |
173 | ||
174 | --up->ref_count; | |
175 | ||
176 | if (up->ref_count >= 1) | |
177 | return up; | |
178 | ||
179 | THREAD_OFF(up->t_ka_timer); | |
180 | THREAD_OFF(up->t_rs_timer); | |
181 | THREAD_OFF(up->t_msdp_reg_timer); | |
182 | ||
183 | if (up->join_state == PIM_UPSTREAM_JOINED) { | |
184 | pim_jp_agg_single_upstream_send(&up->rpf, up, 0); | |
185 | ||
186 | if (up->sg.src.s_addr == INADDR_ANY) { | |
187 | /* if a (*, G) entry in the joined state is being | |
188 | * deleted we | |
189 | * need to notify MSDP */ | |
190 | notify_msdp = true; | |
191 | } | |
192 | } | |
193 | ||
194 | join_timer_stop(up); | |
195 | pim_jp_agg_upstream_verification(up, false); | |
196 | up->rpf.source_nexthop.interface = NULL; | |
197 | ||
198 | if (up->sg.src.s_addr != INADDR_ANY) { | |
9b29ea95 | 199 | wheel_remove_item(pim->upstream_sg_wheel, up); |
d62a17ae | 200 | notify_msdp = true; |
201 | } | |
202 | ||
9b29ea95 | 203 | pim_upstream_remove_children(pim, up); |
d62a17ae | 204 | if (up->sources) |
205 | list_delete(up->sources); | |
206 | up->sources = NULL; | |
207 | pim_mroute_del(up->channel_oil, __PRETTY_FUNCTION__); | |
208 | upstream_channel_oil_detach(up); | |
209 | ||
210 | list_delete(up->ifchannels); | |
211 | up->ifchannels = NULL; | |
212 | ||
213 | /* | |
214 | notice that listnode_delete() can't be moved | |
215 | into pim_upstream_free() because the later is | |
216 | called by list_delete_all_node() | |
217 | */ | |
218 | if (up->parent && up->parent->sources) | |
219 | listnode_delete(up->parent->sources, up); | |
220 | up->parent = NULL; | |
221 | ||
9b29ea95 DS |
222 | listnode_delete(pim->upstream_list, up); |
223 | hash_release(pim->upstream_hash, up); | |
d62a17ae | 224 | |
225 | if (notify_msdp) { | |
472ad383 | 226 | pim_msdp_up_del(pim, &up->sg); |
d62a17ae | 227 | } |
228 | ||
229 | /* Deregister addr with Zebra NHT */ | |
230 | nht_p.family = AF_INET; | |
231 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
232 | nht_p.u.prefix4 = up->upstream_addr; | |
233 | if (PIM_DEBUG_TRACE) { | |
234 | char buf[PREFIX2STR_BUFFER]; | |
235 | prefix2str(&nht_p, buf, sizeof(buf)); | |
236 | zlog_debug("%s: Deregister upstream %s addr %s with Zebra NHT", | |
237 | __PRETTY_FUNCTION__, up->sg_str, buf); | |
238 | } | |
9b29ea95 | 239 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL); |
d62a17ae | 240 | |
241 | pim_upstream_free(up); | |
242 | ||
243 | return NULL; | |
12e41d03 DL |
244 | } |
245 | ||
d62a17ae | 246 | void pim_upstream_send_join(struct pim_upstream *up) |
12e41d03 | 247 | { |
d62a17ae | 248 | if (PIM_DEBUG_TRACE) { |
249 | char rpf_str[PREFIX_STRLEN]; | |
250 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, | |
251 | sizeof(rpf_str)); | |
252 | zlog_debug("%s: RPF'%s=%s(%s) for Interface %s", | |
253 | __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
254 | pim_upstream_state2str(up->join_state), | |
255 | up->rpf.source_nexthop.interface->name); | |
256 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
257 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", | |
258 | __PRETTY_FUNCTION__, up->sg_str, rpf_str); | |
259 | /* warning only */ | |
260 | } | |
261 | } | |
262 | ||
263 | /* send Join(S,G) to the current upstream neighbor */ | |
264 | pim_jp_agg_single_upstream_send(&up->rpf, up, 1 /* join */); | |
12e41d03 DL |
265 | } |
266 | ||
267 | static int on_join_timer(struct thread *t) | |
268 | { | |
d62a17ae | 269 | struct pim_upstream *up; |
12e41d03 | 270 | |
d62a17ae | 271 | up = THREAD_ARG(t); |
12e41d03 | 272 | |
d62a17ae | 273 | /* |
274 | * In the case of a HFR we will not ahve anyone to send this to. | |
275 | */ | |
276 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) | |
277 | return 0; | |
bb6e291f | 278 | |
d62a17ae | 279 | /* |
280 | * Don't send the join if the outgoing interface is a loopback | |
281 | * But since this might change leave the join timer running | |
282 | */ | |
283 | if (up->rpf.source_nexthop | |
284 | .interface && !if_is_loopback(up->rpf.source_nexthop.interface)) | |
285 | pim_upstream_send_join(up); | |
12e41d03 | 286 | |
d62a17ae | 287 | join_timer_start(up); |
12e41d03 | 288 | |
d62a17ae | 289 | return 0; |
12e41d03 DL |
290 | } |
291 | ||
982bff89 | 292 | static void join_timer_stop(struct pim_upstream *up) |
12e41d03 | 293 | { |
d62a17ae | 294 | struct pim_neighbor *nbr; |
982bff89 | 295 | |
d62a17ae | 296 | THREAD_OFF(up->t_join_timer); |
7eb90689 | 297 | |
d62a17ae | 298 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, |
299 | up->rpf.rpf_addr.u.prefix4); | |
982bff89 | 300 | |
d62a17ae | 301 | if (nbr) |
302 | pim_jp_agg_remove_group(nbr->upstream_jp_agg, up); | |
982bff89 | 303 | |
d62a17ae | 304 | pim_jp_agg_upstream_verification(up, false); |
982bff89 DS |
305 | } |
306 | ||
d62a17ae | 307 | void join_timer_start(struct pim_upstream *up) |
982bff89 | 308 | { |
d62a17ae | 309 | struct pim_neighbor *nbr = NULL; |
310 | ||
311 | if (up->rpf.source_nexthop.interface) { | |
312 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, | |
313 | up->rpf.rpf_addr.u.prefix4); | |
314 | ||
315 | if (PIM_DEBUG_PIM_EVENTS) { | |
316 | zlog_debug( | |
317 | "%s: starting %d sec timer for upstream (S,G)=%s", | |
318 | __PRETTY_FUNCTION__, qpim_t_periodic, | |
319 | up->sg_str); | |
320 | } | |
321 | } | |
322 | ||
323 | if (nbr) | |
324 | pim_jp_agg_add_group(nbr->upstream_jp_agg, up, 1); | |
325 | else { | |
326 | THREAD_OFF(up->t_join_timer); | |
327 | thread_add_timer(master, on_join_timer, up, qpim_t_periodic, | |
328 | &up->t_join_timer); | |
329 | } | |
330 | pim_jp_agg_upstream_verification(up, true); | |
12e41d03 DL |
331 | } |
332 | ||
982bff89 DS |
333 | /* |
334 | * This is only called when we are switching the upstream | |
335 | * J/P from one neighbor to another | |
336 | * | |
337 | * As such we need to remove from the old list and | |
338 | * add to the new list. | |
339 | */ | |
d62a17ae | 340 | void pim_upstream_join_timer_restart(struct pim_upstream *up, |
341 | struct pim_rpf *old) | |
12e41d03 | 342 | { |
d62a17ae | 343 | // THREAD_OFF(up->t_join_timer); |
344 | join_timer_start(up); | |
12e41d03 DL |
345 | } |
346 | ||
347 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
348 | int interval_msec) | |
349 | { | |
d62a17ae | 350 | if (PIM_DEBUG_PIM_EVENTS) { |
351 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", | |
352 | __PRETTY_FUNCTION__, interval_msec, up->sg_str); | |
353 | } | |
354 | ||
355 | THREAD_OFF(up->t_join_timer); | |
356 | thread_add_timer_msec(master, on_join_timer, up, interval_msec, | |
357 | &up->t_join_timer); | |
12e41d03 DL |
358 | } |
359 | ||
360 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
d62a17ae | 361 | struct in_addr rpf_addr, int holdtime) |
12e41d03 | 362 | { |
d62a17ae | 363 | long t_joinsuppress_msec; |
364 | long join_timer_remain_msec; | |
365 | ||
366 | t_joinsuppress_msec = | |
367 | MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
368 | 1000 * holdtime); | |
369 | ||
370 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
371 | ||
372 | if (PIM_DEBUG_TRACE) { | |
373 | char rpf_str[INET_ADDRSTRLEN]; | |
374 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); | |
375 | zlog_debug( | |
376 | "%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", | |
377 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
378 | join_timer_remain_msec, t_joinsuppress_msec); | |
379 | } | |
380 | ||
381 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
382 | if (PIM_DEBUG_TRACE) { | |
383 | zlog_debug( | |
384 | "%s %s: suppressing Join(S,G)=%s for %ld msec", | |
385 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, | |
386 | t_joinsuppress_msec); | |
387 | } | |
388 | ||
389 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
390 | } | |
12e41d03 DL |
391 | } |
392 | ||
393 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
d62a17ae | 394 | struct pim_upstream *up) |
12e41d03 | 395 | { |
d62a17ae | 396 | long join_timer_remain_msec; |
397 | int t_override_msec; | |
398 | ||
399 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
400 | t_override_msec = | |
401 | pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
402 | ||
403 | if (PIM_DEBUG_TRACE) { | |
404 | char rpf_str[INET_ADDRSTRLEN]; | |
405 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr.u.prefix4, rpf_str, | |
406 | sizeof(rpf_str)); | |
407 | zlog_debug( | |
408 | "%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", | |
409 | debug_label, up->sg_str, rpf_str, | |
410 | join_timer_remain_msec, t_override_msec); | |
411 | } | |
412 | ||
413 | if (join_timer_remain_msec > t_override_msec) { | |
414 | if (PIM_DEBUG_TRACE) { | |
415 | zlog_debug( | |
416 | "%s: decreasing (S,G)=%s join timer to t_override=%d msec", | |
417 | debug_label, up->sg_str, t_override_msec); | |
418 | } | |
419 | ||
420 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
421 | } | |
12e41d03 DL |
422 | } |
423 | ||
424 | static void forward_on(struct pim_upstream *up) | |
425 | { | |
d62a17ae | 426 | struct listnode *chnode; |
427 | struct listnode *chnextnode; | |
428 | struct pim_ifchannel *ch = NULL; | |
12e41d03 | 429 | |
d62a17ae | 430 | /* scan (S,G) state */ |
431 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
432 | if (pim_macro_chisin_oiflist(ch)) | |
433 | pim_forward_start(ch); | |
12e41d03 | 434 | |
d62a17ae | 435 | } /* scan iface channel list */ |
12e41d03 DL |
436 | } |
437 | ||
438 | static void forward_off(struct pim_upstream *up) | |
439 | { | |
d62a17ae | 440 | struct listnode *chnode; |
441 | struct listnode *chnextnode; | |
442 | struct pim_ifchannel *ch; | |
12e41d03 | 443 | |
d62a17ae | 444 | /* scan per-interface (S,G) state */ |
445 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
12e41d03 | 446 | |
aabb9a2f | 447 | pim_forward_stop(ch, false); |
12e41d03 | 448 | |
d62a17ae | 449 | } /* scan iface channel list */ |
12e41d03 DL |
450 | } |
451 | ||
d62a17ae | 452 | static int pim_upstream_could_register(struct pim_upstream *up) |
bb6e291f | 453 | { |
d62a17ae | 454 | struct pim_interface *pim_ifp = NULL; |
455 | ||
456 | if (up->rpf.source_nexthop.interface) | |
457 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
458 | else { | |
459 | if (PIM_DEBUG_TRACE) | |
460 | zlog_debug("%s: up %s RPF is not present", | |
461 | __PRETTY_FUNCTION__, up->sg_str); | |
462 | } | |
bb6e291f | 463 | |
d62a17ae | 464 | if (pim_ifp && PIM_I_am_DR(pim_ifp) |
465 | && pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
466 | up->sg.src)) | |
467 | return 1; | |
bb6e291f | 468 | |
d62a17ae | 469 | return 0; |
bb6e291f DS |
470 | } |
471 | ||
15a5dafe | 472 | /* Source registration is supressed for SSM groups. When the SSM range changes |
473 | * we re-revaluate register setup for existing upstream entries */ | |
9b29ea95 | 474 | void pim_upstream_register_reevaluate(struct pim_instance *pim) |
15a5dafe | 475 | { |
d62a17ae | 476 | struct listnode *upnode; |
477 | struct pim_upstream *up; | |
478 | ||
9b29ea95 | 479 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
d62a17ae | 480 | /* If FHR is set CouldRegister is True. Also check if the flow |
481 | * is actually active; if it is not kat setup will trigger | |
482 | * source | |
483 | * registration whenever the flow becomes active. */ | |
484 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) || !up->t_ka_timer) | |
485 | continue; | |
486 | ||
6f439a70 | 487 | if (pim_is_grp_ssm(pim, up->sg.grp)) { |
d62a17ae | 488 | /* clear the register state for SSM groups */ |
489 | if (up->reg_state != PIM_REG_NOINFO) { | |
490 | if (PIM_DEBUG_PIM_EVENTS) | |
491 | zlog_debug( | |
492 | "Clear register for %s as G is now SSM", | |
493 | up->sg_str); | |
494 | /* remove regiface from the OIL if it is there*/ | |
495 | pim_channel_del_oif(up->channel_oil, | |
9b29ea95 | 496 | pim->regiface, |
d62a17ae | 497 | PIM_OIF_FLAG_PROTO_PIM); |
498 | up->reg_state = PIM_REG_NOINFO; | |
499 | } | |
500 | } else { | |
501 | /* register ASM sources with the RP */ | |
502 | if (up->reg_state == PIM_REG_NOINFO) { | |
503 | if (PIM_DEBUG_PIM_EVENTS) | |
504 | zlog_debug( | |
505 | "Register %s as G is now ASM", | |
506 | up->sg_str); | |
507 | pim_channel_add_oif(up->channel_oil, | |
9b29ea95 | 508 | pim->regiface, |
d62a17ae | 509 | PIM_OIF_FLAG_PROTO_PIM); |
510 | up->reg_state = PIM_REG_JOIN; | |
511 | } | |
512 | } | |
513 | } | |
15a5dafe | 514 | } |
515 | ||
1eca8576 | 516 | void pim_upstream_switch(struct pim_instance *pim, struct pim_upstream *up, |
d62a17ae | 517 | enum pim_upstream_state new_state) |
12e41d03 | 518 | { |
d62a17ae | 519 | enum pim_upstream_state old_state = up->join_state; |
520 | ||
521 | if (PIM_DEBUG_PIM_EVENTS) { | |
522 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", | |
523 | __PRETTY_FUNCTION__, up->sg_str, | |
524 | pim_upstream_state2str(up->join_state), | |
525 | pim_upstream_state2str(new_state)); | |
526 | } | |
527 | ||
528 | up->join_state = new_state; | |
529 | if (old_state != new_state) | |
530 | up->state_transition = pim_time_monotonic_sec(); | |
531 | ||
532 | pim_upstream_update_assert_tracking_desired(up); | |
533 | ||
534 | if (new_state == PIM_UPSTREAM_JOINED) { | |
535 | if (old_state != PIM_UPSTREAM_JOINED) { | |
536 | int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags); | |
537 | forward_on(up); | |
1eca8576 | 538 | pim_msdp_up_join_state_changed(pim, up); |
d62a17ae | 539 | if (pim_upstream_could_register(up)) { |
540 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
541 | if (!old_fhr | |
542 | && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM( | |
543 | up->flags)) { | |
544 | pim_upstream_keep_alive_timer_start( | |
19b807ca | 545 | up, pim->keep_alive_time); |
d62a17ae | 546 | pim_register_join(up); |
547 | } | |
548 | } else { | |
549 | pim_upstream_send_join(up); | |
550 | join_timer_start(up); | |
551 | } | |
552 | } else { | |
553 | forward_on(up); | |
554 | } | |
555 | } else { | |
556 | ||
557 | forward_off(up); | |
558 | if (old_state == PIM_UPSTREAM_JOINED) | |
1eca8576 | 559 | pim_msdp_up_join_state_changed(pim, up); |
d62a17ae | 560 | |
561 | /* IHR, Trigger SGRpt on *,G IIF to prune S,G from RPT towards | |
562 | RP. | |
563 | If I am RP for G then send S,G prune to its IIF. */ | |
564 | if (pim_upstream_is_sg_rpt(up) && up->parent | |
1eca8576 | 565 | && !I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 566 | if (PIM_DEBUG_PIM_TRACE_DETAIL) |
567 | zlog_debug( | |
568 | "%s: *,G IIF %s S,G IIF %s ", | |
569 | __PRETTY_FUNCTION__, | |
570 | up->parent->rpf.source_nexthop | |
571 | .interface->name, | |
572 | up->rpf.source_nexthop.interface->name); | |
573 | pim_jp_agg_single_upstream_send(&up->parent->rpf, | |
574 | up->parent, | |
575 | 1 /* (W,G) Join */); | |
576 | } else | |
577 | pim_jp_agg_single_upstream_send(&up->rpf, up, | |
578 | 0 /* prune */); | |
579 | join_timer_stop(up); | |
580 | } | |
12e41d03 DL |
581 | } |
582 | ||
d62a17ae | 583 | int pim_upstream_compare(void *arg1, void *arg2) |
03417ccd | 584 | { |
d62a17ae | 585 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
586 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
03417ccd | 587 | |
d62a17ae | 588 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) |
589 | return -1; | |
03417ccd | 590 | |
d62a17ae | 591 | if (ntohl(up1->sg.grp.s_addr) > ntohl(up2->sg.grp.s_addr)) |
592 | return 1; | |
03417ccd | 593 | |
d62a17ae | 594 | if (ntohl(up1->sg.src.s_addr) < ntohl(up2->sg.src.s_addr)) |
595 | return -1; | |
03417ccd | 596 | |
d62a17ae | 597 | if (ntohl(up1->sg.src.s_addr) > ntohl(up2->sg.src.s_addr)) |
598 | return 1; | |
03417ccd | 599 | |
d62a17ae | 600 | return 0; |
03417ccd DS |
601 | } |
602 | ||
2002dcdb DS |
603 | static struct pim_upstream *pim_upstream_new(struct pim_instance *pim, |
604 | struct prefix_sg *sg, | |
605 | struct interface *incoming, | |
0885a9f1 DS |
606 | int flags, |
607 | struct pim_ifchannel *ch) | |
12e41d03 | 608 | { |
d62a17ae | 609 | enum pim_rpf_result rpf_result; |
610 | struct pim_interface *pim_ifp; | |
611 | struct pim_upstream *up; | |
612 | ||
613 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); | |
614 | if (!up) { | |
615 | zlog_err("%s: PIM XCALLOC(%zu) failure", __PRETTY_FUNCTION__, | |
616 | sizeof(*up)); | |
617 | return NULL; | |
618 | } | |
619 | ||
620 | up->sg = *sg; | |
621 | pim_str_sg_set(sg, up->sg_str); | |
0885a9f1 DS |
622 | if (ch) |
623 | ch->upstream = up; | |
624 | ||
9b29ea95 | 625 | up = hash_get(pim->upstream_hash, up, hash_alloc_intern); |
d9c9a9ee DS |
626 | if (!pim_rp_set_upstream_addr(pim, &up->upstream_addr, sg->src, |
627 | sg->grp)) { | |
d62a17ae | 628 | if (PIM_DEBUG_TRACE) |
629 | zlog_debug("%s: Received a (*,G) with no RP configured", | |
630 | __PRETTY_FUNCTION__); | |
631 | ||
9b29ea95 | 632 | hash_release(pim->upstream_hash, up); |
d62a17ae | 633 | XFREE(MTYPE_PIM_UPSTREAM, up); |
634 | return NULL; | |
635 | } | |
636 | ||
9b29ea95 | 637 | up->parent = pim_upstream_find_parent(pim, up); |
d62a17ae | 638 | if (up->sg.src.s_addr == INADDR_ANY) { |
639 | up->sources = list_new(); | |
640 | up->sources->cmp = pim_upstream_compare; | |
641 | } else | |
642 | up->sources = NULL; | |
643 | ||
9b29ea95 | 644 | pim_upstream_find_new_children(pim, up); |
d62a17ae | 645 | up->flags = flags; |
646 | up->ref_count = 1; | |
647 | up->t_join_timer = NULL; | |
648 | up->t_ka_timer = NULL; | |
649 | up->t_rs_timer = NULL; | |
650 | up->t_msdp_reg_timer = NULL; | |
651 | up->join_state = PIM_UPSTREAM_NOTJOINED; | |
652 | up->reg_state = PIM_REG_NOINFO; | |
653 | up->state_transition = pim_time_monotonic_sec(); | |
654 | up->channel_oil = NULL; | |
655 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; | |
656 | ||
657 | up->rpf.source_nexthop.interface = NULL; | |
658 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; | |
659 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = | |
660 | PIM_NET_INADDR_ANY; | |
661 | up->rpf.source_nexthop.mrib_metric_preference = | |
662 | qpim_infinite_assert_metric.metric_preference; | |
663 | up->rpf.source_nexthop.mrib_route_metric = | |
664 | qpim_infinite_assert_metric.route_metric; | |
665 | up->rpf.rpf_addr.family = AF_INET; | |
666 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
667 | ||
668 | up->ifchannels = list_new(); | |
669 | up->ifchannels->cmp = (int (*)(void *, void *))pim_ifchannel_compare; | |
670 | ||
671 | if (up->sg.src.s_addr != INADDR_ANY) | |
9b29ea95 | 672 | wheel_add_item(pim->upstream_sg_wheel, up); |
d62a17ae | 673 | |
2002dcdb | 674 | rpf_result = pim_rpf_update(pim, up, NULL, 1); |
d62a17ae | 675 | if (rpf_result == PIM_RPF_FAILURE) { |
676 | struct prefix nht_p; | |
677 | ||
678 | if (PIM_DEBUG_TRACE) | |
679 | zlog_debug( | |
680 | "%s: Attempting to create upstream(%s), Unable to RPF for source", | |
681 | __PRETTY_FUNCTION__, up->sg_str); | |
682 | ||
683 | nht_p.family = AF_INET; | |
684 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
685 | nht_p.u.prefix4 = up->upstream_addr; | |
2002dcdb | 686 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL); |
d62a17ae | 687 | |
688 | if (up->parent) { | |
689 | listnode_delete(up->parent->sources, up); | |
690 | up->parent = NULL; | |
691 | } | |
692 | ||
693 | if (up->sg.src.s_addr != INADDR_ANY) | |
9b29ea95 | 694 | wheel_remove_item(pim->upstream_sg_wheel, up); |
d62a17ae | 695 | |
9b29ea95 | 696 | pim_upstream_remove_children(pim, up); |
d62a17ae | 697 | if (up->sources) |
698 | list_delete(up->sources); | |
699 | ||
9b29ea95 | 700 | hash_release(pim->upstream_hash, up); |
d62a17ae | 701 | XFREE(MTYPE_PIM_UPSTREAM, up); |
702 | return NULL; | |
703 | } | |
704 | ||
705 | if (up->rpf.source_nexthop.interface) { | |
706 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
707 | if (pim_ifp) | |
708 | up->channel_oil = pim_channel_oil_add( | |
611925dc | 709 | pim, &up->sg, pim_ifp->mroute_vif_index); |
d62a17ae | 710 | } |
9b29ea95 | 711 | listnode_add_sort(pim->upstream_list, up); |
d62a17ae | 712 | |
713 | if (PIM_DEBUG_TRACE) { | |
714 | zlog_debug( | |
715 | "%s: Created Upstream %s upstream_addr %s ref count %d increment", | |
716 | __PRETTY_FUNCTION__, up->sg_str, | |
717 | inet_ntoa(up->upstream_addr), up->ref_count); | |
718 | } | |
719 | ||
720 | return up; | |
12e41d03 DL |
721 | } |
722 | ||
9b29ea95 DS |
723 | struct pim_upstream *pim_upstream_find(struct pim_instance *pim, |
724 | struct prefix_sg *sg) | |
12e41d03 | 725 | { |
d62a17ae | 726 | struct pim_upstream lookup; |
727 | struct pim_upstream *up = NULL; | |
12e41d03 | 728 | |
d62a17ae | 729 | lookup.sg = *sg; |
9b29ea95 | 730 | up = hash_lookup(pim->upstream_hash, &lookup); |
d62a17ae | 731 | return up; |
12e41d03 DL |
732 | } |
733 | ||
d62a17ae | 734 | struct pim_upstream *pim_upstream_find_or_add(struct prefix_sg *sg, |
735 | struct interface *incoming, | |
736 | int flags, const char *name) | |
e711cd3c | 737 | { |
d62a17ae | 738 | struct pim_upstream *up; |
9b29ea95 DS |
739 | struct pim_interface *pim_ifp; |
740 | ||
741 | pim_ifp = incoming->info; | |
d62a17ae | 742 | |
9b29ea95 | 743 | up = pim_upstream_find(pim_ifp->pim, sg); |
d62a17ae | 744 | |
745 | if (up) { | |
746 | if (!(up->flags & flags)) { | |
747 | up->flags |= flags; | |
748 | up->ref_count++; | |
749 | if (PIM_DEBUG_TRACE) | |
750 | zlog_debug( | |
751 | "%s(%s): upstream %s ref count %d increment", | |
752 | __PRETTY_FUNCTION__, name, up->sg_str, | |
753 | up->ref_count); | |
754 | } | |
755 | } else | |
0885a9f1 DS |
756 | up = pim_upstream_add(pim_ifp->pim, sg, incoming, flags, name, |
757 | NULL); | |
d62a17ae | 758 | |
759 | return up; | |
e711cd3c DS |
760 | } |
761 | ||
d62a17ae | 762 | void pim_upstream_ref(struct pim_upstream *up, int flags, const char *name) |
1bf16443 | 763 | { |
d62a17ae | 764 | up->flags |= flags; |
765 | ++up->ref_count; | |
766 | if (PIM_DEBUG_TRACE) | |
767 | zlog_debug("%s(%s): upstream %s ref count %d increment", | |
768 | __PRETTY_FUNCTION__, name, up->sg_str, | |
769 | up->ref_count); | |
1bf16443 | 770 | } |
771 | ||
2002dcdb DS |
772 | struct pim_upstream *pim_upstream_add(struct pim_instance *pim, |
773 | struct prefix_sg *sg, | |
d62a17ae | 774 | struct interface *incoming, int flags, |
0885a9f1 DS |
775 | const char *name, |
776 | struct pim_ifchannel *ch) | |
12e41d03 | 777 | { |
d62a17ae | 778 | struct pim_upstream *up = NULL; |
779 | int found = 0; | |
9b29ea95 | 780 | |
2002dcdb | 781 | up = pim_upstream_find(pim, sg); |
d62a17ae | 782 | if (up) { |
783 | pim_upstream_ref(up, flags, name); | |
784 | found = 1; | |
785 | } else { | |
0885a9f1 | 786 | up = pim_upstream_new(pim, sg, incoming, flags, ch); |
d62a17ae | 787 | } |
788 | ||
789 | if (PIM_DEBUG_TRACE) { | |
790 | if (up) { | |
791 | char buf[PREFIX2STR_BUFFER]; | |
792 | prefix2str(&up->rpf.rpf_addr, buf, sizeof(buf)); | |
793 | zlog_debug("%s(%s): %s, iif %s (%s) found: %d: ref_count: %d", | |
f4075cb4 | 794 | __PRETTY_FUNCTION__, name, |
55785900 CS |
795 | up->sg_str, buf, up->rpf.source_nexthop.interface ? |
796 | up->rpf.source_nexthop.interface->name : "NIL" , | |
797 | found, up->ref_count); | |
d62a17ae | 798 | } else |
799 | zlog_debug("%s(%s): (%s) failure to create", | |
800 | __PRETTY_FUNCTION__, name, | |
801 | pim_str_sg_dump(sg)); | |
802 | } | |
12e41d03 | 803 | |
d62a17ae | 804 | return up; |
12e41d03 DL |
805 | } |
806 | ||
c8fc07cb DS |
807 | /* |
808 | * Passed in up must be the upstream for ch. starch is NULL if no | |
809 | * information | |
810 | */ | |
d62a17ae | 811 | int pim_upstream_evaluate_join_desired_interface(struct pim_upstream *up, |
812 | struct pim_ifchannel *ch, | |
813 | struct pim_ifchannel *starch) | |
7a3ddda5 | 814 | { |
d62a17ae | 815 | if (ch) { |
816 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
817 | return 0; | |
818 | ||
819 | if (!pim_macro_ch_lost_assert(ch) | |
820 | && pim_macro_chisin_joins_or_include(ch)) | |
821 | return 1; | |
822 | } | |
823 | ||
824 | /* | |
825 | * joins (*,G) | |
826 | */ | |
827 | if (starch) { | |
828 | if (PIM_IF_FLAG_TEST_S_G_RPT(starch->upstream->flags)) | |
829 | return 0; | |
830 | ||
831 | if (!pim_macro_ch_lost_assert(starch) | |
832 | && pim_macro_chisin_joins_or_include(starch)) | |
833 | return 1; | |
834 | } | |
835 | ||
836 | return 0; | |
7a3ddda5 DS |
837 | } |
838 | ||
12e41d03 DL |
839 | /* |
840 | Evaluate JoinDesired(S,G): | |
841 | ||
842 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
843 | in the set: | |
844 | ||
845 | inherited_olist(S,G) = | |
846 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
847 | ||
848 | JoinDesired(S,G) may be affected by changes in the following: | |
849 | ||
850 | pim_ifp->primary_address | |
851 | pim_ifp->pim_dr_addr | |
852 | ch->ifassert_winner_metric | |
853 | ch->ifassert_winner | |
d62a17ae | 854 | ch->local_ifmembership |
12e41d03 DL |
855 | ch->ifjoin_state |
856 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
857 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
858 | ch->upstream->rpf.source_nexthop.interface | |
859 | ||
860 | See also pim_upstream_update_join_desired() below. | |
861 | */ | |
9b29ea95 DS |
862 | int pim_upstream_evaluate_join_desired(struct pim_instance *pim, |
863 | struct pim_upstream *up) | |
12e41d03 | 864 | { |
d62a17ae | 865 | struct interface *ifp; |
866 | struct listnode *node; | |
867 | struct pim_ifchannel *ch, *starch; | |
868 | struct pim_upstream *starup = up->parent; | |
869 | int ret = 0; | |
12e41d03 | 870 | |
9b29ea95 | 871 | for (ALL_LIST_ELEMENTS_RO(vrf_iflist(pim->vrf_id), node, ifp)) { |
d62a17ae | 872 | if (!ifp->info) |
873 | continue; | |
c8fc07cb | 874 | |
d62a17ae | 875 | ch = pim_ifchannel_find(ifp, &up->sg); |
c8fc07cb | 876 | |
d62a17ae | 877 | if (starup) |
878 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
879 | else | |
880 | starch = NULL; | |
c8fc07cb | 881 | |
d62a17ae | 882 | if (!ch && !starch) |
883 | continue; | |
12e41d03 | 884 | |
d62a17ae | 885 | ret += pim_upstream_evaluate_join_desired_interface(up, ch, |
886 | starch); | |
887 | } /* scan iface channel list */ | |
12e41d03 | 888 | |
d62a17ae | 889 | return ret; /* false */ |
12e41d03 DL |
890 | } |
891 | ||
892 | /* | |
893 | See also pim_upstream_evaluate_join_desired() above. | |
894 | */ | |
9b29ea95 DS |
895 | void pim_upstream_update_join_desired(struct pim_instance *pim, |
896 | struct pim_upstream *up) | |
12e41d03 | 897 | { |
d62a17ae | 898 | int was_join_desired; /* boolean */ |
899 | int is_join_desired; /* boolean */ | |
900 | ||
901 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
902 | ||
9b29ea95 | 903 | is_join_desired = pim_upstream_evaluate_join_desired(pim, up); |
d62a17ae | 904 | if (is_join_desired) |
905 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
906 | else | |
907 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
908 | ||
909 | /* switched from false to true */ | |
910 | if (is_join_desired && !was_join_desired) { | |
1eca8576 | 911 | pim_upstream_switch(pim, up, PIM_UPSTREAM_JOINED); |
d62a17ae | 912 | return; |
913 | } | |
914 | ||
915 | /* switched from true to false */ | |
916 | if (!is_join_desired && was_join_desired) { | |
1eca8576 | 917 | pim_upstream_switch(pim, up, PIM_UPSTREAM_NOTJOINED); |
d62a17ae | 918 | return; |
919 | } | |
12e41d03 DL |
920 | } |
921 | ||
922 | /* | |
923 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
924 | Transitions from Joined State | |
925 | RPF'(S,G) GenID changes | |
926 | ||
927 | The upstream (S,G) state machine remains in Joined state. If the | |
928 | Join Timer is set to expire in more than t_override seconds, reset | |
929 | it so that it expires after t_override seconds. | |
930 | */ | |
9b29ea95 DS |
931 | void pim_upstream_rpf_genid_changed(struct pim_instance *pim, |
932 | struct in_addr neigh_addr) | |
12e41d03 | 933 | { |
d62a17ae | 934 | struct listnode *up_node; |
935 | struct listnode *up_nextnode; | |
936 | struct pim_upstream *up; | |
937 | ||
938 | /* | |
939 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
940 | */ | |
9b29ea95 | 941 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { |
d62a17ae | 942 | |
943 | if (PIM_DEBUG_TRACE) { | |
944 | char neigh_str[INET_ADDRSTRLEN]; | |
945 | char rpf_addr_str[PREFIX_STRLEN]; | |
946 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, | |
947 | sizeof(neigh_str)); | |
948 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, | |
949 | sizeof(rpf_addr_str)); | |
950 | zlog_debug( | |
951 | "%s: matching neigh=%s against upstream (S,G)=%s joined=%d rpf_addr=%s", | |
952 | __PRETTY_FUNCTION__, neigh_str, up->sg_str, | |
953 | up->join_state == PIM_UPSTREAM_JOINED, | |
954 | rpf_addr_str); | |
955 | } | |
956 | ||
957 | /* consider only (S,G) upstream in Joined state */ | |
958 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
959 | continue; | |
960 | ||
961 | /* match RPF'(S,G)=neigh_addr */ | |
962 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) | |
963 | continue; | |
964 | ||
965 | pim_upstream_join_timer_decrease_to_t_override( | |
966 | "RPF'(S,G) GenID change", up); | |
967 | } | |
12e41d03 DL |
968 | } |
969 | ||
970 | ||
971 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
972 | struct interface *old_rpf_ifp) | |
973 | { | |
d62a17ae | 974 | struct listnode *chnode; |
975 | struct listnode *chnextnode; | |
976 | struct pim_ifchannel *ch; | |
977 | ||
978 | /* search all ifchannels */ | |
979 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
980 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
981 | if ( | |
982 | /* RPF_interface(S) was NOT I */ | |
983 | (old_rpf_ifp == ch->interface) && | |
984 | /* RPF_interface(S) stopped being I */ | |
985 | (ch->upstream->rpf.source_nexthop | |
986 | .interface != ch->interface)) { | |
987 | assert_action_a5(ch); | |
988 | } | |
989 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
990 | ||
991 | pim_ifchannel_update_assert_tracking_desired(ch); | |
992 | } | |
12e41d03 DL |
993 | } |
994 | ||
995 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
996 | { | |
d62a17ae | 997 | struct listnode *chnode; |
998 | struct listnode *chnextnode; | |
999 | struct pim_ifchannel *ch; | |
1000 | ||
1001 | /* scan per-interface (S,G) state */ | |
1002 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1003 | pim_ifchannel_update_could_assert(ch); | |
1004 | } /* scan iface channel list */ | |
12e41d03 DL |
1005 | } |
1006 | ||
1007 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
1008 | { | |
d62a17ae | 1009 | struct listnode *chnode; |
1010 | struct listnode *chnextnode; | |
1011 | struct pim_ifchannel *ch; | |
12e41d03 | 1012 | |
d62a17ae | 1013 | /* scan per-interface (S,G) state */ |
1014 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1015 | pim_ifchannel_update_my_assert_metric(ch); | |
12e41d03 | 1016 | |
d62a17ae | 1017 | } /* scan iface channel list */ |
12e41d03 DL |
1018 | } |
1019 | ||
1020 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
1021 | { | |
d62a17ae | 1022 | struct listnode *chnode; |
1023 | struct listnode *chnextnode; | |
1024 | struct pim_interface *pim_ifp; | |
1025 | struct pim_ifchannel *ch; | |
1026 | ||
1027 | /* scan per-interface (S,G) state */ | |
1028 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1029 | if (!ch->interface) | |
1030 | continue; | |
1031 | pim_ifp = ch->interface->info; | |
1032 | if (!pim_ifp) | |
1033 | continue; | |
1034 | ||
1035 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1036 | ||
1037 | } /* scan iface channel list */ | |
12e41d03 | 1038 | } |
f14248dd | 1039 | |
1bf16443 | 1040 | /* When kat is stopped CouldRegister goes to false so we need to |
1041 | * transition the (S, G) on FHR to NI state and remove reg tunnel | |
1042 | * from the OIL */ | |
9b29ea95 DS |
1043 | static void pim_upstream_fhr_kat_expiry(struct pim_instance *pim, |
1044 | struct pim_upstream *up) | |
1bf16443 | 1045 | { |
d62a17ae | 1046 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
1047 | return; | |
1048 | ||
1049 | if (PIM_DEBUG_TRACE) | |
1050 | zlog_debug("kat expired on %s; clear fhr reg state", | |
1051 | up->sg_str); | |
1052 | ||
1053 | /* stop reg-stop timer */ | |
1054 | THREAD_OFF(up->t_rs_timer); | |
1055 | /* remove regiface from the OIL if it is there*/ | |
9b29ea95 | 1056 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1057 | PIM_OIF_FLAG_PROTO_PIM); |
1058 | /* clear the register state */ | |
1059 | up->reg_state = PIM_REG_NOINFO; | |
1060 | PIM_UPSTREAM_FLAG_UNSET_FHR(up->flags); | |
1bf16443 | 1061 | } |
1062 | ||
1063 | /* When kat is started CouldRegister can go to true. And if it does we | |
1064 | * need to transition the (S, G) on FHR to JOINED state and add reg tunnel | |
1065 | * to the OIL */ | |
1066 | static void pim_upstream_fhr_kat_start(struct pim_upstream *up) | |
1067 | { | |
d62a17ae | 1068 | if (pim_upstream_could_register(up)) { |
1069 | if (PIM_DEBUG_TRACE) | |
1070 | zlog_debug( | |
1071 | "kat started on %s; set fhr reg state to joined", | |
1072 | up->sg_str); | |
1073 | ||
1074 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
1075 | if (up->reg_state == PIM_REG_NOINFO) | |
1076 | pim_register_join(up); | |
1077 | } | |
1bf16443 | 1078 | } |
1079 | ||
f14248dd DS |
1080 | /* |
1081 | * On an RP, the PMBR value must be cleared when the | |
1082 | * Keepalive Timer expires | |
1bf16443 | 1083 | * KAT expiry indicates that flow is inactive. If the flow was created or |
1084 | * maintained by activity now is the time to deref it. | |
f14248dd | 1085 | */ |
d62a17ae | 1086 | static int pim_upstream_keep_alive_timer(struct thread *t) |
f14248dd | 1087 | { |
d62a17ae | 1088 | struct pim_upstream *up; |
8e5f97e3 | 1089 | struct pim_instance *pim; |
d62a17ae | 1090 | |
1091 | up = THREAD_ARG(t); | |
8e5f97e3 | 1092 | pim = up->channel_oil->pim; |
d62a17ae | 1093 | |
8e5f97e3 | 1094 | if (I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 1095 | pim_br_clear_pmbr(&up->sg); |
1096 | /* | |
1097 | * We need to do more here :) | |
1098 | * But this is the start. | |
1099 | */ | |
1100 | } | |
1101 | ||
1102 | /* source is no longer active - pull the SA from MSDP's cache */ | |
472ad383 | 1103 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 1104 | |
1105 | /* if entry was created because of activity we need to deref it */ | |
1106 | if (PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
8e5f97e3 | 1107 | pim_upstream_fhr_kat_expiry(pim, up); |
d62a17ae | 1108 | if (PIM_DEBUG_TRACE) |
1109 | zlog_debug("kat expired on %s; remove stream reference", | |
1110 | up->sg_str); | |
1111 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(up->flags); | |
8e5f97e3 | 1112 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
d62a17ae | 1113 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) { |
1114 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(up->flags); | |
8e5f97e3 | 1115 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
d62a17ae | 1116 | } |
1117 | ||
1118 | return 0; | |
f14248dd DS |
1119 | } |
1120 | ||
d62a17ae | 1121 | void pim_upstream_keep_alive_timer_start(struct pim_upstream *up, uint32_t time) |
f14248dd | 1122 | { |
d62a17ae | 1123 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { |
1124 | if (PIM_DEBUG_TRACE) | |
1125 | zlog_debug("kat start on %s with no stream reference", | |
1126 | up->sg_str); | |
1127 | } | |
1128 | THREAD_OFF(up->t_ka_timer); | |
1129 | thread_add_timer(master, pim_upstream_keep_alive_timer, up, time, | |
1130 | &up->t_ka_timer); | |
1131 | ||
1132 | /* any time keepalive is started against a SG we will have to | |
1133 | * re-evaluate our active source database */ | |
1134 | pim_msdp_sa_local_update(up); | |
1bf16443 | 1135 | } |
1136 | ||
1137 | /* MSDP on RP needs to know if a source is registerable to this RP */ | |
d62a17ae | 1138 | static int pim_upstream_msdp_reg_timer(struct thread *t) |
1bf16443 | 1139 | { |
472ad383 DS |
1140 | struct pim_upstream *up = THREAD_ARG(t); |
1141 | struct pim_instance *pim = up->channel_oil->pim; | |
1bf16443 | 1142 | |
d62a17ae | 1143 | /* source is no longer active - pull the SA from MSDP's cache */ |
472ad383 | 1144 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 1145 | return 1; |
1bf16443 | 1146 | } |
d62a17ae | 1147 | void pim_upstream_msdp_reg_timer_start(struct pim_upstream *up) |
1bf16443 | 1148 | { |
d62a17ae | 1149 | THREAD_OFF(up->t_msdp_reg_timer); |
1150 | thread_add_timer(master, pim_upstream_msdp_reg_timer, up, | |
1151 | PIM_MSDP_REG_RXED_PERIOD, &up->t_msdp_reg_timer); | |
1bf16443 | 1152 | |
d62a17ae | 1153 | pim_msdp_sa_local_update(up); |
f14248dd | 1154 | } |
cb40b272 DS |
1155 | |
1156 | /* | |
1157 | * 4.2.1 Last-Hop Switchover to the SPT | |
1158 | * | |
1159 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
1160 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
1161 | * router, it has the option of switching to receive the traffic on a | |
1162 | * shortest path tree (SPT). | |
1163 | * | |
1164 | * The decision for a router to switch to the SPT is controlled as | |
1165 | * follows: | |
1166 | * | |
1167 | * void | |
1168 | * CheckSwitchToSpt(S,G) { | |
1169 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
1170 | * (+) pim_include(S,G) != NULL ) | |
1171 | * AND SwitchToSptDesired(S,G) ) { | |
1172 | * # Note: Restarting the KAT will result in the SPT switch | |
1173 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1174 | * } | |
1175 | * } | |
1176 | * | |
1177 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
1178 | * defined. An "infinite threshold" policy can be implemented by making | |
1179 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
1180 | * first packet" policy can be implemented by making | |
1181 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
1182 | * received for the source and group. | |
1183 | */ | |
8e5f97e3 DS |
1184 | int pim_upstream_switch_to_spt_desired(struct pim_instance *pim, |
1185 | struct prefix_sg *sg) | |
cb40b272 | 1186 | { |
8e5f97e3 | 1187 | if (I_am_RP(pim, sg->grp)) |
d62a17ae | 1188 | return 1; |
a3b58b4a | 1189 | |
d62a17ae | 1190 | return 0; |
cb40b272 | 1191 | } |
d7259eac | 1192 | |
d62a17ae | 1193 | int pim_upstream_is_sg_rpt(struct pim_upstream *up) |
80d9c3a0 | 1194 | { |
d62a17ae | 1195 | struct listnode *chnode; |
1196 | struct pim_ifchannel *ch; | |
f21597f0 | 1197 | |
d62a17ae | 1198 | for (ALL_LIST_ELEMENTS_RO(up->ifchannels, chnode, ch)) { |
1199 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
1200 | return 1; | |
1201 | } | |
e43b8697 | 1202 | |
d62a17ae | 1203 | return 0; |
80d9c3a0 | 1204 | } |
3a66b17b DS |
1205 | /* |
1206 | * After receiving a packet set SPTbit: | |
1207 | * void | |
1208 | * Update_SPTbit(S,G,iif) { | |
1209 | * if ( iif == RPF_interface(S) | |
1210 | * AND JoinDesired(S,G) == TRUE | |
1211 | * AND ( DirectlyConnected(S) == TRUE | |
1212 | * OR RPF_interface(S) != RPF_interface(RP(G)) | |
1213 | * OR inherited_olist(S,G,rpt) == NULL | |
1214 | * OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1215 | * ( RPF'(S,G) != NULL ) ) | |
1216 | * OR ( I_Am_Assert_Loser(S,G,iif) ) { | |
1217 | * Set SPTbit(S,G) to TRUE | |
1218 | * } | |
1219 | * } | |
1220 | */ | |
d62a17ae | 1221 | void pim_upstream_set_sptbit(struct pim_upstream *up, |
1222 | struct interface *incoming) | |
3a66b17b | 1223 | { |
d62a17ae | 1224 | struct pim_upstream *starup = up->parent; |
1225 | ||
1226 | // iif == RPF_interfvace(S) | |
1227 | if (up->rpf.source_nexthop.interface != incoming) { | |
1228 | if (PIM_DEBUG_TRACE) | |
1229 | zlog_debug( | |
1230 | "%s: Incoming Interface: %s is different than RPF_interface(S) %s", | |
1231 | __PRETTY_FUNCTION__, incoming->name, | |
1232 | up->rpf.source_nexthop.interface->name); | |
1233 | return; | |
1234 | } | |
1235 | ||
1236 | // AND JoinDesired(S,G) == TRUE | |
1237 | // FIXME | |
1238 | ||
1239 | // DirectlyConnected(S) == TRUE | |
1240 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1241 | up->sg.src)) { | |
1242 | if (PIM_DEBUG_TRACE) | |
1243 | zlog_debug("%s: %s is directly connected to the source", | |
1244 | __PRETTY_FUNCTION__, up->sg_str); | |
1245 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1246 | return; | |
1247 | } | |
1248 | ||
1249 | // OR RPF_interface(S) != RPF_interface(RP(G)) | |
1250 | if (!starup | |
1251 | || up->rpf.source_nexthop | |
1252 | .interface != starup->rpf.source_nexthop.interface) { | |
1253 | if (PIM_DEBUG_TRACE) | |
1254 | zlog_debug( | |
1255 | "%s: %s RPF_interface(S) != RPF_interface(RP(G))", | |
1256 | __PRETTY_FUNCTION__, up->sg_str); | |
1257 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1258 | return; | |
1259 | } | |
1260 | ||
1261 | // OR inherited_olist(S,G,rpt) == NULL | |
1262 | if (pim_upstream_is_sg_rpt(up) | |
1263 | && pim_upstream_empty_inherited_olist(up)) { | |
1264 | if (PIM_DEBUG_TRACE) | |
1265 | zlog_debug("%s: %s OR inherited_olist(S,G,rpt) == NULL", | |
1266 | __PRETTY_FUNCTION__, up->sg_str); | |
1267 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1268 | return; | |
1269 | } | |
1270 | ||
1271 | // OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1272 | // ( RPF'(S,G) != NULL ) ) | |
1273 | if (up->parent && pim_rpf_is_same(&up->rpf, &up->parent->rpf)) { | |
1274 | if (PIM_DEBUG_TRACE) | |
1275 | zlog_debug("%s: %s RPF'(S,G) is the same as RPF'(*,G)", | |
1276 | __PRETTY_FUNCTION__, up->sg_str); | |
1277 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1278 | return; | |
1279 | } | |
1280 | ||
1281 | return; | |
3a66b17b | 1282 | } |
80d9c3a0 | 1283 | |
d62a17ae | 1284 | const char *pim_upstream_state2str(enum pim_upstream_state join_state) |
d7259eac | 1285 | { |
d62a17ae | 1286 | switch (join_state) { |
1287 | case PIM_UPSTREAM_NOTJOINED: | |
1288 | return "NotJoined"; | |
1289 | break; | |
1290 | case PIM_UPSTREAM_JOINED: | |
1291 | return "Joined"; | |
1292 | break; | |
1293 | } | |
1294 | return "Unknown"; | |
d7259eac | 1295 | } |
627ed2a3 | 1296 | |
d62a17ae | 1297 | const char *pim_reg_state2str(enum pim_reg_state reg_state, char *state_str) |
e0e127b0 | 1298 | { |
d62a17ae | 1299 | switch (reg_state) { |
1300 | case PIM_REG_NOINFO: | |
1301 | strcpy(state_str, "RegNoInfo"); | |
1302 | break; | |
1303 | case PIM_REG_JOIN: | |
1304 | strcpy(state_str, "RegJoined"); | |
1305 | break; | |
1306 | case PIM_REG_JOIN_PENDING: | |
1307 | strcpy(state_str, "RegJoinPend"); | |
1308 | break; | |
1309 | case PIM_REG_PRUNE: | |
1310 | strcpy(state_str, "RegPrune"); | |
1311 | break; | |
1312 | default: | |
1313 | strcpy(state_str, "RegUnknown"); | |
1314 | } | |
1315 | return state_str; | |
e0e127b0 | 1316 | } |
1317 | ||
d62a17ae | 1318 | static int pim_upstream_register_stop_timer(struct thread *t) |
627ed2a3 | 1319 | { |
d62a17ae | 1320 | struct pim_interface *pim_ifp; |
8e5f97e3 | 1321 | struct pim_instance *pim; |
d62a17ae | 1322 | struct pim_upstream *up; |
1323 | struct pim_rpf *rpg; | |
1324 | struct ip ip_hdr; | |
1325 | up = THREAD_ARG(t); | |
8e5f97e3 | 1326 | pim = up->channel_oil->pim; |
d62a17ae | 1327 | |
1328 | if (PIM_DEBUG_TRACE) { | |
1329 | char state_str[PIM_REG_STATE_STR_LEN]; | |
1330 | zlog_debug("%s: (S,G)=%s upstream register stop timer %s", | |
1331 | __PRETTY_FUNCTION__, up->sg_str, | |
1332 | pim_reg_state2str(up->reg_state, state_str)); | |
1333 | } | |
1334 | ||
1335 | switch (up->reg_state) { | |
1336 | case PIM_REG_JOIN_PENDING: | |
1337 | up->reg_state = PIM_REG_JOIN; | |
8e5f97e3 | 1338 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1339 | PIM_OIF_FLAG_PROTO_PIM); |
1340 | break; | |
1341 | case PIM_REG_JOIN: | |
1342 | break; | |
1343 | case PIM_REG_PRUNE: | |
1344 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
1345 | if (!pim_ifp) { | |
1346 | if (PIM_DEBUG_TRACE) | |
1347 | zlog_debug( | |
1348 | "%s: Interface: %s is not configured for pim", | |
1349 | __PRETTY_FUNCTION__, | |
1350 | up->rpf.source_nexthop.interface->name); | |
1351 | return 0; | |
1352 | } | |
1353 | up->reg_state = PIM_REG_JOIN_PENDING; | |
1354 | pim_upstream_start_register_stop_timer(up, 1); | |
1355 | ||
1356 | if (((up->channel_oil->cc.lastused / 100) | |
1357 | > PIM_KEEPALIVE_PERIOD) | |
d9c9a9ee | 1358 | && (I_am_RP(pim_ifp->pim, up->sg.grp))) { |
d62a17ae | 1359 | if (PIM_DEBUG_TRACE) |
1360 | zlog_debug( | |
1361 | "%s: Stop sending the register, because I am the RP and we haven't seen a packet in a while", | |
1362 | __PRETTY_FUNCTION__); | |
1363 | return 0; | |
1364 | } | |
d9c9a9ee | 1365 | rpg = RP(pim_ifp->pim, up->sg.grp); |
1e7a3a2a DS |
1366 | if (!rpg) { |
1367 | if (PIM_DEBUG_TRACE) | |
1368 | zlog_debug( | |
1369 | "%s: Cannot send register for %s no RPF to the RP", | |
1370 | __PRETTY_FUNCTION__, up->sg_str); | |
1371 | return 0; | |
1372 | } | |
d62a17ae | 1373 | memset(&ip_hdr, 0, sizeof(struct ip)); |
1374 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
1375 | ip_hdr.ip_hl = 5; | |
1376 | ip_hdr.ip_v = 4; | |
1377 | ip_hdr.ip_src = up->sg.src; | |
1378 | ip_hdr.ip_dst = up->sg.grp; | |
1379 | ip_hdr.ip_len = htons(20); | |
1380 | // checksum is broken | |
1381 | pim_register_send((uint8_t *)&ip_hdr, sizeof(struct ip), | |
1382 | pim_ifp->primary_address, rpg, 1, up); | |
1383 | break; | |
1384 | default: | |
1385 | break; | |
70e7fda8 | 1386 | } |
d62a17ae | 1387 | |
1388 | return 0; | |
627ed2a3 DS |
1389 | } |
1390 | ||
d62a17ae | 1391 | void pim_upstream_start_register_stop_timer(struct pim_upstream *up, |
1392 | int null_register) | |
627ed2a3 | 1393 | { |
d62a17ae | 1394 | uint32_t time; |
1395 | ||
1396 | THREAD_TIMER_OFF(up->t_rs_timer); | |
1397 | ||
1398 | if (!null_register) { | |
1399 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1400 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1401 | time = lower + (random() % (upper - lower + 1)) | |
1402 | - PIM_REGISTER_PROBE_PERIOD; | |
1403 | } else | |
1404 | time = PIM_REGISTER_PROBE_PERIOD; | |
1405 | ||
1406 | if (PIM_DEBUG_TRACE) { | |
1407 | zlog_debug( | |
1408 | "%s: (S,G)=%s Starting upstream register stop timer %d", | |
1409 | __PRETTY_FUNCTION__, up->sg_str, time); | |
1410 | } | |
1411 | thread_add_timer(master, pim_upstream_register_stop_timer, up, time, | |
1412 | &up->t_rs_timer); | |
627ed2a3 | 1413 | } |
4fdc8f36 | 1414 | |
9b29ea95 DS |
1415 | int pim_upstream_inherited_olist_decide(struct pim_instance *pim, |
1416 | struct pim_upstream *up) | |
4fdc8f36 | 1417 | { |
d62a17ae | 1418 | struct interface *ifp; |
1419 | struct pim_interface *pim_ifp = NULL; | |
1420 | struct pim_ifchannel *ch, *starch; | |
1421 | struct listnode *node; | |
1422 | struct pim_upstream *starup = up->parent; | |
1423 | int output_intf = 0; | |
1424 | ||
1425 | if (up->rpf.source_nexthop.interface) | |
1426 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
1427 | else { | |
1428 | if (PIM_DEBUG_TRACE) | |
1429 | zlog_debug("%s: up %s RPF is not present", | |
1430 | __PRETTY_FUNCTION__, up->sg_str); | |
1431 | } | |
1432 | if (pim_ifp && !up->channel_oil) | |
611925dc DS |
1433 | up->channel_oil = pim_channel_oil_add( |
1434 | pim, &up->sg, pim_ifp->mroute_vif_index); | |
d62a17ae | 1435 | |
9b29ea95 | 1436 | for (ALL_LIST_ELEMENTS_RO(vrf_iflist(pim->vrf_id), node, ifp)) { |
d62a17ae | 1437 | if (!ifp->info) |
1438 | continue; | |
1439 | ||
1440 | ch = pim_ifchannel_find(ifp, &up->sg); | |
1441 | ||
1442 | if (starup) | |
1443 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
1444 | else | |
1445 | starch = NULL; | |
1446 | ||
1447 | if (!ch && !starch) | |
1448 | continue; | |
1449 | ||
1450 | if (pim_upstream_evaluate_join_desired_interface(up, ch, | |
1451 | starch)) { | |
1452 | int flag = PIM_OIF_FLAG_PROTO_PIM; | |
1453 | ||
1454 | if (!ch) | |
1455 | flag = PIM_OIF_FLAG_PROTO_STAR; | |
1456 | ||
1457 | pim_channel_add_oif(up->channel_oil, ifp, flag); | |
1458 | output_intf++; | |
1459 | } | |
1460 | } | |
1461 | ||
1462 | return output_intf; | |
b5183fd1 DS |
1463 | } |
1464 | ||
1465 | /* | |
1466 | * For a given upstream, determine the inherited_olist | |
1467 | * and apply it. | |
1468 | * | |
1469 | * inherited_olist(S,G,rpt) = | |
1470 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1471 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1472 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1473 | * | |
1474 | * inherited_olist(S,G) = | |
1475 | * inherited_olist(S,G,rpt) (+) | |
1476 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1477 | * | |
1478 | * return 1 if there are any output interfaces | |
1479 | * return 0 if there are not any output interfaces | |
1480 | */ | |
9b29ea95 DS |
1481 | int pim_upstream_inherited_olist(struct pim_instance *pim, |
1482 | struct pim_upstream *up) | |
b5183fd1 | 1483 | { |
9b29ea95 | 1484 | int output_intf = pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 1485 | |
1486 | /* | |
1487 | * If we have output_intf switch state to Join and work like normal | |
1488 | * If we don't have an output_intf that means we are probably a | |
1489 | * switch on a stick so turn on forwarding to just accept the | |
1490 | * incoming packets so we don't bother the other stuff! | |
1491 | */ | |
1492 | if (output_intf) | |
1eca8576 | 1493 | pim_upstream_switch(pim, up, PIM_UPSTREAM_JOINED); |
d62a17ae | 1494 | else |
1495 | forward_on(up); | |
1496 | ||
1497 | return output_intf; | |
4fdc8f36 | 1498 | } |
d3dd1804 | 1499 | |
d62a17ae | 1500 | int pim_upstream_empty_inherited_olist(struct pim_upstream *up) |
80d9c3a0 | 1501 | { |
d62a17ae | 1502 | return pim_channel_oil_empty(up->channel_oil); |
80d9c3a0 DS |
1503 | } |
1504 | ||
d3dd1804 DS |
1505 | /* |
1506 | * When we have a new neighbor, | |
1507 | * find upstreams that don't have their rpf_addr | |
1508 | * set and see if the new neighbor allows | |
1509 | * the join to be sent | |
1510 | */ | |
9b29ea95 | 1511 | void pim_upstream_find_new_rpf(struct pim_instance *pim) |
d3dd1804 | 1512 | { |
d62a17ae | 1513 | struct listnode *up_node; |
1514 | struct listnode *up_nextnode; | |
1515 | struct pim_upstream *up; | |
1516 | ||
1517 | /* | |
1518 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
1519 | */ | |
9b29ea95 | 1520 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { |
d62a17ae | 1521 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { |
1522 | if (PIM_DEBUG_TRACE) | |
1523 | zlog_debug( | |
1524 | "Upstream %s without a path to send join, checking", | |
1525 | up->sg_str); | |
2002dcdb | 1526 | pim_rpf_update(pim, up, NULL, 1); |
d62a17ae | 1527 | } |
d3dd1804 | 1528 | } |
d3dd1804 | 1529 | } |
0f588989 | 1530 | |
7c591950 | 1531 | unsigned int pim_upstream_hash_key(void *arg) |
0f588989 | 1532 | { |
d62a17ae | 1533 | struct pim_upstream *up = (struct pim_upstream *)arg; |
0f588989 | 1534 | |
d62a17ae | 1535 | return jhash_2words(up->sg.src.s_addr, up->sg.grp.s_addr, 0); |
0f588989 DS |
1536 | } |
1537 | ||
9b29ea95 | 1538 | void pim_upstream_terminate(struct pim_instance *pim) |
0f588989 | 1539 | { |
9b29ea95 DS |
1540 | if (pim->upstream_list) |
1541 | list_delete(pim->upstream_list); | |
1542 | pim->upstream_list = NULL; | |
0f588989 | 1543 | |
9b29ea95 DS |
1544 | if (pim->upstream_hash) |
1545 | hash_free(pim->upstream_hash); | |
1546 | pim->upstream_hash = NULL; | |
0f588989 DS |
1547 | } |
1548 | ||
7c591950 | 1549 | int pim_upstream_equal(const void *arg1, const void *arg2) |
0f588989 | 1550 | { |
d62a17ae | 1551 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
1552 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
0f588989 | 1553 | |
d62a17ae | 1554 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) |
1555 | && (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
1556 | return 1; | |
0f588989 | 1557 | |
d62a17ae | 1558 | return 0; |
0f588989 DS |
1559 | } |
1560 | ||
1bf16443 | 1561 | /* rfc4601:section-4.2:"Data Packet Forwarding Rules" defines |
1562 | * the cases where kat has to be restarted on rxing traffic - | |
1563 | * | |
1564 | * if( DirectlyConnected(S) == TRUE AND iif == RPF_interface(S) ) { | |
1565 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1566 | * # Note: a register state transition or UpstreamJPState(S,G) | |
1567 | * # transition may happen as a result of restarting | |
1568 | * # KeepaliveTimer, and must be dealt with here. | |
1569 | * } | |
1570 | * if( iif == RPF_interface(S) AND UpstreamJPState(S,G) == Joined AND | |
1571 | * inherited_olist(S,G) != NULL ) { | |
1572 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1573 | * } | |
1574 | */ | |
1575 | static bool pim_upstream_kat_start_ok(struct pim_upstream *up) | |
1576 | { | |
8e5f97e3 DS |
1577 | struct pim_instance *pim = up->channel_oil->pim; |
1578 | ||
d62a17ae | 1579 | /* "iif == RPF_interface(S)" check has to be done by the kernel or hw |
1580 | * so we will skip that here */ | |
1581 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1582 | up->sg.src)) { | |
1583 | return true; | |
1584 | } | |
1585 | ||
1586 | if ((up->join_state == PIM_UPSTREAM_JOINED) | |
1587 | && !pim_upstream_empty_inherited_olist(up)) { | |
1588 | /* XXX: I have added this RP check just for 3.2 and it's a | |
1589 | * digression from | |
1590 | * what rfc-4601 says. Till now we were only running KAT on FHR | |
1591 | * and RP and | |
1592 | * there is some angst around making the change to run it all | |
1593 | * routers that | |
1594 | * maintain the (S, G) state. This is tracked via CM-13601 and | |
1595 | * MUST be | |
1596 | * removed to handle spt turn-arounds correctly in a 3-tier clos | |
1597 | */ | |
8e5f97e3 | 1598 | if (I_am_RP(pim, up->sg.grp)) |
d62a17ae | 1599 | return true; |
1600 | } | |
1601 | ||
1602 | return false; | |
1bf16443 | 1603 | } |
1604 | ||
9c5e4d62 DS |
1605 | /* |
1606 | * Code to check and see if we've received packets on a S,G mroute | |
1607 | * and if so to set the SPT bit appropriately | |
1608 | */ | |
d62a17ae | 1609 | static void pim_upstream_sg_running(void *arg) |
9c5e4d62 | 1610 | { |
d62a17ae | 1611 | struct pim_upstream *up = (struct pim_upstream *)arg; |
8e5f97e3 | 1612 | struct pim_instance *pim = up->channel_oil->pim; |
d62a17ae | 1613 | |
1614 | // No packet can have arrived here if this is the case | |
8e5f97e3 | 1615 | if (!up->channel_oil->installed) { |
d62a17ae | 1616 | if (PIM_DEBUG_TRACE) |
1617 | zlog_debug("%s: %s is not installed in mroute", | |
1618 | __PRETTY_FUNCTION__, up->sg_str); | |
1619 | return; | |
1620 | } | |
1621 | ||
1622 | /* | |
1623 | * This is a bit of a hack | |
1624 | * We've noted that we should rescan but | |
1625 | * we've missed the window for doing so in | |
1626 | * pim_zebra.c for some reason. I am | |
1627 | * only doing this at this point in time | |
1628 | * to get us up and working for the moment | |
1629 | */ | |
1630 | if (up->channel_oil->oil_inherited_rescan) { | |
1631 | if (PIM_DEBUG_TRACE) | |
1632 | zlog_debug( | |
1633 | "%s: Handling unscanned inherited_olist for %s", | |
1634 | __PRETTY_FUNCTION__, up->sg_str); | |
8e5f97e3 | 1635 | pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 1636 | up->channel_oil->oil_inherited_rescan = 0; |
1637 | } | |
1638 | pim_mroute_update_counters(up->channel_oil); | |
1639 | ||
1640 | // Have we seen packets? | |
1641 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) | |
1642 | && (up->channel_oil->cc.lastused / 100 > 30)) { | |
1643 | if (PIM_DEBUG_TRACE) { | |
1644 | zlog_debug( | |
1645 | "%s: %s old packet count is equal or lastused is greater than 30, (%ld,%ld,%lld)", | |
1646 | __PRETTY_FUNCTION__, up->sg_str, | |
1647 | up->channel_oil->cc.oldpktcnt, | |
1648 | up->channel_oil->cc.pktcnt, | |
1649 | up->channel_oil->cc.lastused / 100); | |
1650 | } | |
1651 | return; | |
e43b8697 | 1652 | } |
d62a17ae | 1653 | |
1654 | if (pim_upstream_kat_start_ok(up)) { | |
1655 | /* Add a source reference to the stream if | |
1656 | * one doesn't already exist */ | |
1657 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
1658 | if (PIM_DEBUG_TRACE) | |
1659 | zlog_debug( | |
1660 | "source reference created on kat restart %s", | |
1661 | up->sg_str); | |
1662 | ||
1663 | pim_upstream_ref(up, PIM_UPSTREAM_FLAG_MASK_SRC_STREAM, | |
1664 | __PRETTY_FUNCTION__); | |
1665 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); | |
1666 | pim_upstream_fhr_kat_start(up); | |
1667 | } | |
19b807ca | 1668 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); |
d62a17ae | 1669 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) |
19b807ca | 1670 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); |
d62a17ae | 1671 | |
1672 | if (up->sptbit != PIM_UPSTREAM_SPTBIT_TRUE) { | |
1673 | pim_upstream_set_sptbit(up, up->rpf.source_nexthop.interface); | |
850a9f99 | 1674 | } |
d62a17ae | 1675 | return; |
9c5e4d62 DS |
1676 | } |
1677 | ||
9b29ea95 | 1678 | void pim_upstream_add_lhr_star_pimreg(struct pim_instance *pim) |
a7b2b1e2 | 1679 | { |
d62a17ae | 1680 | struct pim_upstream *up; |
1681 | struct listnode *node; | |
a7b2b1e2 | 1682 | |
9b29ea95 | 1683 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { |
d62a17ae | 1684 | if (up->sg.src.s_addr != INADDR_ANY) |
1685 | continue; | |
a7b2b1e2 | 1686 | |
d62a17ae | 1687 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) |
1688 | continue; | |
a7b2b1e2 | 1689 | |
9b29ea95 | 1690 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1691 | PIM_OIF_FLAG_PROTO_IGMP); |
1692 | } | |
a7b2b1e2 DS |
1693 | } |
1694 | ||
9b29ea95 DS |
1695 | void pim_upstream_spt_prefix_list_update(struct pim_instance *pim, |
1696 | struct prefix_list *pl) | |
df94f9a9 | 1697 | { |
d62a17ae | 1698 | const char *pname = prefix_list_name(pl); |
df94f9a9 | 1699 | |
9b29ea95 DS |
1700 | if (pim->spt.plist && strcmp(pim->spt.plist, pname) == 0) { |
1701 | pim_upstream_remove_lhr_star_pimreg(pim, pname); | |
d62a17ae | 1702 | } |
df94f9a9 DS |
1703 | } |
1704 | ||
1705 | /* | |
1706 | * nlist -> The new prefix list | |
1707 | * | |
1708 | * Per Group Application of pimreg to the OIL | |
1709 | * If the prefix list tells us DENY then | |
1710 | * we need to Switchover to SPT immediate | |
1711 | * so add the pimreg. | |
1712 | * If the prefix list tells us to ACCEPT than | |
1713 | * we need to Never do the SPT so remove | |
1714 | * the interface | |
1715 | * | |
1716 | */ | |
9b29ea95 DS |
1717 | void pim_upstream_remove_lhr_star_pimreg(struct pim_instance *pim, |
1718 | const char *nlist) | |
a7b2b1e2 | 1719 | { |
d62a17ae | 1720 | struct pim_upstream *up; |
1721 | struct listnode *node; | |
1722 | struct prefix_list *np; | |
1723 | struct prefix g; | |
1724 | enum prefix_list_type apply_new; | |
1725 | ||
1726 | np = prefix_list_lookup(AFI_IP, nlist); | |
1727 | ||
1728 | g.family = AF_INET; | |
1729 | g.prefixlen = IPV4_MAX_PREFIXLEN; | |
1730 | ||
9b29ea95 | 1731 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { |
d62a17ae | 1732 | if (up->sg.src.s_addr != INADDR_ANY) |
1733 | continue; | |
1734 | ||
1735 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) | |
1736 | continue; | |
1737 | ||
1738 | if (!nlist) { | |
9b29ea95 | 1739 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1740 | PIM_OIF_FLAG_PROTO_IGMP); |
1741 | continue; | |
1742 | } | |
1743 | g.u.prefix4 = up->sg.grp; | |
1744 | apply_new = prefix_list_apply(np, &g); | |
1745 | if (apply_new == PREFIX_DENY) | |
9b29ea95 | 1746 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1747 | PIM_OIF_FLAG_PROTO_IGMP); |
1748 | else | |
9b29ea95 | 1749 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1750 | PIM_OIF_FLAG_PROTO_IGMP); |
1751 | } | |
a7b2b1e2 DS |
1752 | } |
1753 | ||
9b29ea95 | 1754 | void pim_upstream_init(struct pim_instance *pim) |
0f588989 | 1755 | { |
9fb302f4 DS |
1756 | char hash_name[64]; |
1757 | ||
9b29ea95 | 1758 | pim->upstream_sg_wheel = |
d62a17ae | 1759 | wheel_init(master, 31000, 100, pim_upstream_hash_key, |
1760 | pim_upstream_sg_running); | |
9fb302f4 DS |
1761 | |
1762 | snprintf(hash_name, 64, "PIM %s Upstream Hash", | |
1763 | pim->vrf->name); | |
9b29ea95 | 1764 | pim->upstream_hash = hash_create_size(8192, pim_upstream_hash_key, |
9fb302f4 | 1765 | pim_upstream_equal, hash_name); |
d62a17ae | 1766 | |
9b29ea95 DS |
1767 | pim->upstream_list = list_new(); |
1768 | pim->upstream_list->del = (void (*)(void *))pim_upstream_free; | |
1769 | pim->upstream_list->cmp = pim_upstream_compare; | |
0f588989 | 1770 | } |