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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 | ||
12e41d03 DL |
22 | #include "log.h" |
23 | #include "zclient.h" | |
24 | #include "memory.h" | |
25 | #include "thread.h" | |
26 | #include "linklist.h" | |
dfe43e25 DW |
27 | #include "vty.h" |
28 | #include "plist.h" | |
0f588989 DS |
29 | #include "hash.h" |
30 | #include "jhash.h" | |
9c5e4d62 | 31 | #include "wheel.h" |
12e41d03 DL |
32 | |
33 | #include "pimd.h" | |
34 | #include "pim_pim.h" | |
35 | #include "pim_str.h" | |
36 | #include "pim_time.h" | |
37 | #include "pim_iface.h" | |
38 | #include "pim_join.h" | |
39 | #include "pim_zlookup.h" | |
40 | #include "pim_upstream.h" | |
41 | #include "pim_ifchannel.h" | |
42 | #include "pim_neighbor.h" | |
43 | #include "pim_rpf.h" | |
44 | #include "pim_zebra.h" | |
45 | #include "pim_oil.h" | |
46 | #include "pim_macro.h" | |
8f5f5e91 | 47 | #include "pim_rp.h" |
f14248dd | 48 | #include "pim_br.h" |
627ed2a3 | 49 | #include "pim_register.h" |
3c72d654 | 50 | #include "pim_msdp.h" |
982bff89 | 51 | #include "pim_jp_agg.h" |
1bc98276 | 52 | #include "pim_nht.h" |
15a5dafe | 53 | #include "pim_ssm.h" |
b9f3a51c | 54 | #include "pim_vxlan.h" |
12e41d03 | 55 | |
982bff89 | 56 | static void join_timer_stop(struct pim_upstream *up); |
d62a17ae | 57 | static void |
58 | pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); | |
12e41d03 | 59 | |
cfa91a87 DS |
60 | /* |
61 | * A (*,G) or a (*,*) is going away | |
62 | * remove the parent pointer from | |
63 | * those pointing at us | |
64 | */ | |
9b29ea95 DS |
65 | static void pim_upstream_remove_children(struct pim_instance *pim, |
66 | struct pim_upstream *up) | |
cfa91a87 | 67 | { |
d62a17ae | 68 | struct pim_upstream *child; |
69 | ||
70 | if (!up->sources) | |
71 | return; | |
72 | ||
73 | while (!list_isempty(up->sources)) { | |
74 | child = listnode_head(up->sources); | |
75 | listnode_delete(up->sources, child); | |
76 | if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(child->flags)) { | |
77 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(child->flags); | |
9b29ea95 DS |
78 | child = pim_upstream_del(pim, child, |
79 | __PRETTY_FUNCTION__); | |
d62a17ae | 80 | } |
81 | if (child) | |
82 | child->parent = NULL; | |
83 | } | |
6a154c88 | 84 | list_delete(&up->sources); |
cfa91a87 DS |
85 | } |
86 | ||
87 | /* | |
88 | * A (*,G) or a (*,*) is being created | |
89 | * Find the children that would point | |
90 | * at us. | |
91 | */ | |
9b29ea95 DS |
92 | static void pim_upstream_find_new_children(struct pim_instance *pim, |
93 | struct pim_upstream *up) | |
cfa91a87 | 94 | { |
d62a17ae | 95 | struct pim_upstream *child; |
96 | struct listnode *ch_node; | |
97 | ||
98 | if ((up->sg.src.s_addr != INADDR_ANY) | |
99 | && (up->sg.grp.s_addr != INADDR_ANY)) | |
100 | return; | |
101 | ||
102 | if ((up->sg.src.s_addr == INADDR_ANY) | |
103 | && (up->sg.grp.s_addr == INADDR_ANY)) | |
104 | return; | |
105 | ||
9b29ea95 | 106 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, ch_node, child)) { |
d62a17ae | 107 | if ((up->sg.grp.s_addr != INADDR_ANY) |
108 | && (child->sg.grp.s_addr == up->sg.grp.s_addr) | |
109 | && (child != up)) { | |
110 | child->parent = up; | |
111 | listnode_add_sort(up->sources, child); | |
112 | } | |
03417ccd | 113 | } |
cfa91a87 DS |
114 | } |
115 | ||
4d99418b DS |
116 | /* |
117 | * If we have a (*,*) || (S,*) there is no parent | |
118 | * If we have a (S,G), find the (*,G) | |
119 | * If we have a (*,G), find the (*,*) | |
120 | */ | |
9b29ea95 DS |
121 | static struct pim_upstream *pim_upstream_find_parent(struct pim_instance *pim, |
122 | struct pim_upstream *child) | |
4d99418b | 123 | { |
d62a17ae | 124 | struct prefix_sg any = child->sg; |
125 | struct pim_upstream *up = NULL; | |
4d99418b | 126 | |
d62a17ae | 127 | // (S,G) |
128 | if ((child->sg.src.s_addr != INADDR_ANY) | |
129 | && (child->sg.grp.s_addr != INADDR_ANY)) { | |
130 | any.src.s_addr = INADDR_ANY; | |
9b29ea95 | 131 | up = pim_upstream_find(pim, &any); |
03417ccd | 132 | |
d62a17ae | 133 | if (up) |
134 | listnode_add(up->sources, child); | |
03417ccd | 135 | |
d62a17ae | 136 | return up; |
137 | } | |
4d99418b | 138 | |
d62a17ae | 139 | return NULL; |
4d99418b DS |
140 | } |
141 | ||
12e41d03 DL |
142 | static void upstream_channel_oil_detach(struct pim_upstream *up) |
143 | { | |
d62a17ae | 144 | if (up->channel_oil) { |
145 | /* Detaching from channel_oil, channel_oil may exist post del, | |
146 | but upstream would not keep reference of it | |
147 | */ | |
13221cf2 | 148 | up->channel_oil->up = NULL; |
d62a17ae | 149 | pim_channel_oil_del(up->channel_oil); |
150 | up->channel_oil = NULL; | |
151 | } | |
12e41d03 DL |
152 | } |
153 | ||
9b29ea95 DS |
154 | struct pim_upstream *pim_upstream_del(struct pim_instance *pim, |
155 | struct pim_upstream *up, const char *name) | |
12e41d03 | 156 | { |
7692c5ae DS |
157 | struct listnode *node, *nnode; |
158 | struct pim_ifchannel *ch; | |
d62a17ae | 159 | bool notify_msdp = false; |
160 | struct prefix nht_p; | |
161 | ||
162 | if (PIM_DEBUG_TRACE) | |
163 | zlog_debug( | |
8dbdb215 | 164 | "%s(%s): Delete %s[%s] ref count: %d , flags: %d c_oil ref count %d (Pre decrement)", |
996c9314 LB |
165 | __PRETTY_FUNCTION__, name, up->sg_str, pim->vrf->name, |
166 | up->ref_count, up->flags, | |
167 | up->channel_oil->oil_ref_count); | |
d62a17ae | 168 | |
e83f3b31 | 169 | assert(up->ref_count > 0); |
170 | ||
d62a17ae | 171 | --up->ref_count; |
172 | ||
173 | if (up->ref_count >= 1) | |
174 | return up; | |
175 | ||
176 | THREAD_OFF(up->t_ka_timer); | |
177 | THREAD_OFF(up->t_rs_timer); | |
178 | THREAD_OFF(up->t_msdp_reg_timer); | |
179 | ||
180 | if (up->join_state == PIM_UPSTREAM_JOINED) { | |
181 | pim_jp_agg_single_upstream_send(&up->rpf, up, 0); | |
182 | ||
183 | if (up->sg.src.s_addr == INADDR_ANY) { | |
184 | /* if a (*, G) entry in the joined state is being | |
185 | * deleted we | |
186 | * need to notify MSDP */ | |
187 | notify_msdp = true; | |
188 | } | |
189 | } | |
190 | ||
191 | join_timer_stop(up); | |
192 | pim_jp_agg_upstream_verification(up, false); | |
193 | up->rpf.source_nexthop.interface = NULL; | |
194 | ||
195 | if (up->sg.src.s_addr != INADDR_ANY) { | |
391b8b08 DS |
196 | if (pim->upstream_sg_wheel) |
197 | wheel_remove_item(pim->upstream_sg_wheel, up); | |
d62a17ae | 198 | notify_msdp = true; |
199 | } | |
200 | ||
d62a17ae | 201 | pim_mroute_del(up->channel_oil, __PRETTY_FUNCTION__); |
202 | upstream_channel_oil_detach(up); | |
203 | ||
7692c5ae DS |
204 | for (ALL_LIST_ELEMENTS(up->ifchannels, node, nnode, ch)) |
205 | pim_ifchannel_delete(ch); | |
6a154c88 | 206 | list_delete(&up->ifchannels); |
d62a17ae | 207 | |
7692c5ae DS |
208 | pim_upstream_remove_children(pim, up); |
209 | if (up->sources) | |
6a154c88 | 210 | list_delete(&up->sources); |
7692c5ae | 211 | |
d62a17ae | 212 | if (up->parent && up->parent->sources) |
213 | listnode_delete(up->parent->sources, up); | |
214 | up->parent = NULL; | |
215 | ||
9b29ea95 DS |
216 | listnode_delete(pim->upstream_list, up); |
217 | hash_release(pim->upstream_hash, up); | |
d62a17ae | 218 | |
219 | if (notify_msdp) { | |
472ad383 | 220 | pim_msdp_up_del(pim, &up->sg); |
d62a17ae | 221 | } |
222 | ||
246445a3 SP |
223 | /* When RP gets deleted, pim_rp_del() deregister addr with Zebra NHT |
224 | * and assign up->upstream_addr as INADDR_ANY. | |
225 | * So before de-registering the upstream address, check if is not equal | |
226 | * to INADDR_ANY. This is done in order to avoid de-registering for | |
227 | * 255.255.255.255 which is maintained for some reason.. | |
228 | */ | |
229 | if (up->upstream_addr.s_addr != INADDR_ANY) { | |
230 | /* Deregister addr with Zebra NHT */ | |
231 | nht_p.family = AF_INET; | |
232 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
233 | nht_p.u.prefix4 = up->upstream_addr; | |
234 | if (PIM_DEBUG_TRACE) { | |
235 | char buf[PREFIX2STR_BUFFER]; | |
236 | prefix2str(&nht_p, buf, sizeof(buf)); | |
237 | zlog_debug("%s: Deregister upstream %s addr %s with Zebra NHT", | |
238 | __PRETTY_FUNCTION__, up->sg_str, buf); | |
239 | } | |
240 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL); | |
d62a17ae | 241 | } |
d62a17ae | 242 | |
172e45dc | 243 | XFREE(MTYPE_PIM_UPSTREAM, up); |
d62a17ae | 244 | |
245 | return NULL; | |
12e41d03 DL |
246 | } |
247 | ||
d62a17ae | 248 | void pim_upstream_send_join(struct pim_upstream *up) |
12e41d03 | 249 | { |
957d93ea SP |
250 | if (!up->rpf.source_nexthop.interface) { |
251 | if (PIM_DEBUG_TRACE) | |
252 | zlog_debug("%s: up %s RPF is not present", | |
253 | __PRETTY_FUNCTION__, up->sg_str); | |
254 | return; | |
255 | } | |
256 | ||
d62a17ae | 257 | if (PIM_DEBUG_TRACE) { |
258 | char rpf_str[PREFIX_STRLEN]; | |
259 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, | |
260 | sizeof(rpf_str)); | |
261 | zlog_debug("%s: RPF'%s=%s(%s) for Interface %s", | |
262 | __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
263 | pim_upstream_state2str(up->join_state), | |
264 | up->rpf.source_nexthop.interface->name); | |
265 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
266 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", | |
267 | __PRETTY_FUNCTION__, up->sg_str, rpf_str); | |
268 | /* warning only */ | |
269 | } | |
270 | } | |
271 | ||
272 | /* send Join(S,G) to the current upstream neighbor */ | |
273 | pim_jp_agg_single_upstream_send(&up->rpf, up, 1 /* join */); | |
12e41d03 DL |
274 | } |
275 | ||
276 | static int on_join_timer(struct thread *t) | |
277 | { | |
d62a17ae | 278 | struct pim_upstream *up; |
12e41d03 | 279 | |
d62a17ae | 280 | up = THREAD_ARG(t); |
12e41d03 | 281 | |
957d93ea SP |
282 | if (!up->rpf.source_nexthop.interface) { |
283 | if (PIM_DEBUG_TRACE) | |
284 | zlog_debug("%s: up %s RPF is not present", | |
285 | __PRETTY_FUNCTION__, up->sg_str); | |
286 | return 0; | |
287 | } | |
288 | ||
d62a17ae | 289 | /* |
290 | * In the case of a HFR we will not ahve anyone to send this to. | |
291 | */ | |
292 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) | |
293 | return 0; | |
bb6e291f | 294 | |
d62a17ae | 295 | /* |
296 | * Don't send the join if the outgoing interface is a loopback | |
297 | * But since this might change leave the join timer running | |
298 | */ | |
299 | if (up->rpf.source_nexthop | |
300 | .interface && !if_is_loopback(up->rpf.source_nexthop.interface)) | |
301 | pim_upstream_send_join(up); | |
12e41d03 | 302 | |
d62a17ae | 303 | join_timer_start(up); |
12e41d03 | 304 | |
d62a17ae | 305 | return 0; |
12e41d03 DL |
306 | } |
307 | ||
982bff89 | 308 | static void join_timer_stop(struct pim_upstream *up) |
12e41d03 | 309 | { |
47e3ce59 | 310 | struct pim_neighbor *nbr = NULL; |
957d93ea | 311 | |
d62a17ae | 312 | THREAD_OFF(up->t_join_timer); |
7eb90689 | 313 | |
47e3ce59 SP |
314 | if (up->rpf.source_nexthop.interface) |
315 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, | |
316 | up->rpf.rpf_addr.u.prefix4); | |
982bff89 | 317 | |
d62a17ae | 318 | if (nbr) |
319 | pim_jp_agg_remove_group(nbr->upstream_jp_agg, up); | |
982bff89 | 320 | |
d62a17ae | 321 | pim_jp_agg_upstream_verification(up, false); |
982bff89 DS |
322 | } |
323 | ||
d62a17ae | 324 | void join_timer_start(struct pim_upstream *up) |
982bff89 | 325 | { |
d62a17ae | 326 | struct pim_neighbor *nbr = NULL; |
327 | ||
328 | if (up->rpf.source_nexthop.interface) { | |
329 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, | |
330 | up->rpf.rpf_addr.u.prefix4); | |
331 | ||
332 | if (PIM_DEBUG_PIM_EVENTS) { | |
333 | zlog_debug( | |
334 | "%s: starting %d sec timer for upstream (S,G)=%s", | |
5b45753e | 335 | __PRETTY_FUNCTION__, router->t_periodic, |
d62a17ae | 336 | up->sg_str); |
337 | } | |
338 | } | |
339 | ||
340 | if (nbr) | |
341 | pim_jp_agg_add_group(nbr->upstream_jp_agg, up, 1); | |
342 | else { | |
343 | THREAD_OFF(up->t_join_timer); | |
36417fcc | 344 | thread_add_timer(router->master, on_join_timer, up, |
5b45753e | 345 | router->t_periodic, &up->t_join_timer); |
d62a17ae | 346 | } |
347 | pim_jp_agg_upstream_verification(up, true); | |
12e41d03 DL |
348 | } |
349 | ||
982bff89 DS |
350 | /* |
351 | * This is only called when we are switching the upstream | |
352 | * J/P from one neighbor to another | |
353 | * | |
354 | * As such we need to remove from the old list and | |
355 | * add to the new list. | |
356 | */ | |
d62a17ae | 357 | void pim_upstream_join_timer_restart(struct pim_upstream *up, |
358 | struct pim_rpf *old) | |
12e41d03 | 359 | { |
d62a17ae | 360 | // THREAD_OFF(up->t_join_timer); |
361 | join_timer_start(up); | |
12e41d03 DL |
362 | } |
363 | ||
364 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
365 | int interval_msec) | |
366 | { | |
d62a17ae | 367 | if (PIM_DEBUG_PIM_EVENTS) { |
368 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", | |
369 | __PRETTY_FUNCTION__, interval_msec, up->sg_str); | |
370 | } | |
371 | ||
372 | THREAD_OFF(up->t_join_timer); | |
36417fcc | 373 | thread_add_timer_msec(router->master, on_join_timer, up, interval_msec, |
d62a17ae | 374 | &up->t_join_timer); |
12e41d03 DL |
375 | } |
376 | ||
377 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
d62a17ae | 378 | struct in_addr rpf_addr, int holdtime) |
12e41d03 | 379 | { |
d62a17ae | 380 | long t_joinsuppress_msec; |
381 | long join_timer_remain_msec; | |
382 | ||
957d93ea SP |
383 | if (!up->rpf.source_nexthop.interface) { |
384 | if (PIM_DEBUG_TRACE) | |
385 | zlog_debug("%s: up %s RPF is not present", | |
386 | __PRETTY_FUNCTION__, up->sg_str); | |
387 | return; | |
388 | } | |
389 | ||
d62a17ae | 390 | t_joinsuppress_msec = |
391 | MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
392 | 1000 * holdtime); | |
393 | ||
394 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
395 | ||
396 | if (PIM_DEBUG_TRACE) { | |
397 | char rpf_str[INET_ADDRSTRLEN]; | |
398 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); | |
399 | zlog_debug( | |
400 | "%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", | |
401 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
402 | join_timer_remain_msec, t_joinsuppress_msec); | |
403 | } | |
404 | ||
405 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
406 | if (PIM_DEBUG_TRACE) { | |
407 | zlog_debug( | |
408 | "%s %s: suppressing Join(S,G)=%s for %ld msec", | |
409 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, | |
410 | t_joinsuppress_msec); | |
411 | } | |
412 | ||
413 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
414 | } | |
12e41d03 DL |
415 | } |
416 | ||
417 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
d62a17ae | 418 | struct pim_upstream *up) |
12e41d03 | 419 | { |
d62a17ae | 420 | long join_timer_remain_msec; |
421 | int t_override_msec; | |
422 | ||
957d93ea SP |
423 | if (!up->rpf.source_nexthop.interface) { |
424 | if (PIM_DEBUG_TRACE) | |
425 | zlog_debug("%s: up %s RPF is not present", | |
426 | __PRETTY_FUNCTION__, up->sg_str); | |
427 | return; | |
428 | } | |
429 | ||
d62a17ae | 430 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); |
431 | t_override_msec = | |
432 | pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
433 | ||
434 | if (PIM_DEBUG_TRACE) { | |
435 | char rpf_str[INET_ADDRSTRLEN]; | |
436 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr.u.prefix4, rpf_str, | |
437 | sizeof(rpf_str)); | |
438 | zlog_debug( | |
439 | "%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", | |
440 | debug_label, up->sg_str, rpf_str, | |
441 | join_timer_remain_msec, t_override_msec); | |
442 | } | |
443 | ||
444 | if (join_timer_remain_msec > t_override_msec) { | |
445 | if (PIM_DEBUG_TRACE) { | |
446 | zlog_debug( | |
447 | "%s: decreasing (S,G)=%s join timer to t_override=%d msec", | |
448 | debug_label, up->sg_str, t_override_msec); | |
449 | } | |
450 | ||
451 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
452 | } | |
12e41d03 DL |
453 | } |
454 | ||
455 | static void forward_on(struct pim_upstream *up) | |
456 | { | |
d62a17ae | 457 | struct listnode *chnode; |
458 | struct listnode *chnextnode; | |
459 | struct pim_ifchannel *ch = NULL; | |
12e41d03 | 460 | |
d62a17ae | 461 | /* scan (S,G) state */ |
462 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
463 | if (pim_macro_chisin_oiflist(ch)) | |
464 | pim_forward_start(ch); | |
12e41d03 | 465 | |
d62a17ae | 466 | } /* scan iface channel list */ |
12e41d03 DL |
467 | } |
468 | ||
469 | static void forward_off(struct pim_upstream *up) | |
470 | { | |
d62a17ae | 471 | struct listnode *chnode; |
472 | struct listnode *chnextnode; | |
473 | struct pim_ifchannel *ch; | |
12e41d03 | 474 | |
d62a17ae | 475 | /* scan per-interface (S,G) state */ |
476 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
12e41d03 | 477 | |
aabb9a2f | 478 | pim_forward_stop(ch, false); |
12e41d03 | 479 | |
d62a17ae | 480 | } /* scan iface channel list */ |
12e41d03 DL |
481 | } |
482 | ||
d62a17ae | 483 | static int pim_upstream_could_register(struct pim_upstream *up) |
bb6e291f | 484 | { |
d62a17ae | 485 | struct pim_interface *pim_ifp = NULL; |
486 | ||
8eeaef9b AK |
487 | /* FORCE_PIMREG is a generic flag to let an app like VxLAN-AA register |
488 | * a source on an upstream entry even if the source is not directly | |
489 | * connected on the IIF. | |
490 | */ | |
491 | if (PIM_UPSTREAM_FLAG_TEST_FORCE_PIMREG(up->flags)) | |
492 | return 1; | |
493 | ||
d62a17ae | 494 | if (up->rpf.source_nexthop.interface) |
495 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
496 | else { | |
497 | if (PIM_DEBUG_TRACE) | |
498 | zlog_debug("%s: up %s RPF is not present", | |
499 | __PRETTY_FUNCTION__, up->sg_str); | |
500 | } | |
bb6e291f | 501 | |
d62a17ae | 502 | if (pim_ifp && PIM_I_am_DR(pim_ifp) |
503 | && pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
504 | up->sg.src)) | |
505 | return 1; | |
bb6e291f | 506 | |
d62a17ae | 507 | return 0; |
bb6e291f DS |
508 | } |
509 | ||
0437e105 | 510 | /* Source registration is suppressed for SSM groups. When the SSM range changes |
15a5dafe | 511 | * we re-revaluate register setup for existing upstream entries */ |
9b29ea95 | 512 | void pim_upstream_register_reevaluate(struct pim_instance *pim) |
15a5dafe | 513 | { |
d62a17ae | 514 | struct listnode *upnode; |
515 | struct pim_upstream *up; | |
516 | ||
9b29ea95 | 517 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
d62a17ae | 518 | /* If FHR is set CouldRegister is True. Also check if the flow |
519 | * is actually active; if it is not kat setup will trigger | |
520 | * source | |
521 | * registration whenever the flow becomes active. */ | |
522 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) || !up->t_ka_timer) | |
523 | continue; | |
524 | ||
6f439a70 | 525 | if (pim_is_grp_ssm(pim, up->sg.grp)) { |
d62a17ae | 526 | /* clear the register state for SSM groups */ |
527 | if (up->reg_state != PIM_REG_NOINFO) { | |
528 | if (PIM_DEBUG_PIM_EVENTS) | |
529 | zlog_debug( | |
530 | "Clear register for %s as G is now SSM", | |
531 | up->sg_str); | |
532 | /* remove regiface from the OIL if it is there*/ | |
533 | pim_channel_del_oif(up->channel_oil, | |
9b29ea95 | 534 | pim->regiface, |
d62a17ae | 535 | PIM_OIF_FLAG_PROTO_PIM); |
536 | up->reg_state = PIM_REG_NOINFO; | |
537 | } | |
538 | } else { | |
539 | /* register ASM sources with the RP */ | |
540 | if (up->reg_state == PIM_REG_NOINFO) { | |
541 | if (PIM_DEBUG_PIM_EVENTS) | |
542 | zlog_debug( | |
543 | "Register %s as G is now ASM", | |
544 | up->sg_str); | |
545 | pim_channel_add_oif(up->channel_oil, | |
9b29ea95 | 546 | pim->regiface, |
d62a17ae | 547 | PIM_OIF_FLAG_PROTO_PIM); |
548 | up->reg_state = PIM_REG_JOIN; | |
549 | } | |
550 | } | |
551 | } | |
15a5dafe | 552 | } |
553 | ||
1eca8576 | 554 | void pim_upstream_switch(struct pim_instance *pim, struct pim_upstream *up, |
d62a17ae | 555 | enum pim_upstream_state new_state) |
12e41d03 | 556 | { |
d62a17ae | 557 | enum pim_upstream_state old_state = up->join_state; |
558 | ||
957d93ea | 559 | if (up->upstream_addr.s_addr == INADDR_ANY) { |
47e3ce59 SP |
560 | if (PIM_DEBUG_PIM_EVENTS) |
561 | zlog_debug("%s: RPF not configured for %s", | |
562 | __PRETTY_FUNCTION__, up->sg_str); | |
957d93ea SP |
563 | return; |
564 | } | |
565 | ||
566 | if (!up->rpf.source_nexthop.interface) { | |
47e3ce59 SP |
567 | if (PIM_DEBUG_PIM_EVENTS) |
568 | zlog_debug("%s: RP not reachable for %s", | |
569 | __PRETTY_FUNCTION__, up->sg_str); | |
957d93ea SP |
570 | return; |
571 | } | |
572 | ||
d62a17ae | 573 | if (PIM_DEBUG_PIM_EVENTS) { |
574 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", | |
575 | __PRETTY_FUNCTION__, up->sg_str, | |
576 | pim_upstream_state2str(up->join_state), | |
577 | pim_upstream_state2str(new_state)); | |
578 | } | |
579 | ||
580 | up->join_state = new_state; | |
581 | if (old_state != new_state) | |
582 | up->state_transition = pim_time_monotonic_sec(); | |
583 | ||
584 | pim_upstream_update_assert_tracking_desired(up); | |
585 | ||
586 | if (new_state == PIM_UPSTREAM_JOINED) { | |
b077f571 | 587 | pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 588 | if (old_state != PIM_UPSTREAM_JOINED) { |
589 | int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags); | |
b077f571 | 590 | |
1eca8576 | 591 | pim_msdp_up_join_state_changed(pim, up); |
d62a17ae | 592 | if (pim_upstream_could_register(up)) { |
593 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
594 | if (!old_fhr | |
595 | && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM( | |
596 | up->flags)) { | |
597 | pim_upstream_keep_alive_timer_start( | |
19b807ca | 598 | up, pim->keep_alive_time); |
d62a17ae | 599 | pim_register_join(up); |
600 | } | |
601 | } else { | |
602 | pim_upstream_send_join(up); | |
603 | join_timer_start(up); | |
604 | } | |
d62a17ae | 605 | } |
606 | } else { | |
607 | ||
608 | forward_off(up); | |
609 | if (old_state == PIM_UPSTREAM_JOINED) | |
1eca8576 | 610 | pim_msdp_up_join_state_changed(pim, up); |
d62a17ae | 611 | |
612 | /* IHR, Trigger SGRpt on *,G IIF to prune S,G from RPT towards | |
613 | RP. | |
614 | If I am RP for G then send S,G prune to its IIF. */ | |
615 | if (pim_upstream_is_sg_rpt(up) && up->parent | |
1eca8576 | 616 | && !I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 617 | if (PIM_DEBUG_PIM_TRACE_DETAIL) |
618 | zlog_debug( | |
957d93ea SP |
619 | "%s: *,G IIF %s S,G IIF %s ", |
620 | __PRETTY_FUNCTION__, | |
621 | up->parent->rpf.source_nexthop.interface ? | |
622 | up->parent->rpf.source_nexthop.interface->name | |
623 | : "Unknown", | |
624 | up->rpf.source_nexthop.interface ? | |
625 | up->rpf.source_nexthop.interface->name : | |
626 | "Unknown"); | |
d62a17ae | 627 | pim_jp_agg_single_upstream_send(&up->parent->rpf, |
628 | up->parent, | |
629 | 1 /* (W,G) Join */); | |
630 | } else | |
631 | pim_jp_agg_single_upstream_send(&up->rpf, up, | |
632 | 0 /* prune */); | |
633 | join_timer_stop(up); | |
634 | } | |
12e41d03 DL |
635 | } |
636 | ||
d62a17ae | 637 | int pim_upstream_compare(void *arg1, void *arg2) |
03417ccd | 638 | { |
d62a17ae | 639 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
640 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
03417ccd | 641 | |
d62a17ae | 642 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) |
643 | return -1; | |
03417ccd | 644 | |
d62a17ae | 645 | if (ntohl(up1->sg.grp.s_addr) > ntohl(up2->sg.grp.s_addr)) |
646 | return 1; | |
03417ccd | 647 | |
d62a17ae | 648 | if (ntohl(up1->sg.src.s_addr) < ntohl(up2->sg.src.s_addr)) |
649 | return -1; | |
03417ccd | 650 | |
d62a17ae | 651 | if (ntohl(up1->sg.src.s_addr) > ntohl(up2->sg.src.s_addr)) |
652 | return 1; | |
03417ccd | 653 | |
d62a17ae | 654 | return 0; |
03417ccd DS |
655 | } |
656 | ||
6a5de0ad AK |
657 | void pim_upstream_fill_static_iif(struct pim_upstream *up, |
658 | struct interface *incoming) | |
659 | { | |
660 | up->rpf.source_nexthop.interface = incoming; | |
661 | ||
662 | /* reset other parameters to matched a connected incoming interface */ | |
663 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; | |
664 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = | |
665 | PIM_NET_INADDR_ANY; | |
666 | up->rpf.source_nexthop.mrib_metric_preference = | |
667 | ZEBRA_CONNECT_DISTANCE_DEFAULT; | |
668 | up->rpf.source_nexthop.mrib_route_metric = 0; | |
669 | up->rpf.rpf_addr.family = AF_INET; | |
670 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
671 | ||
672 | } | |
673 | ||
2002dcdb DS |
674 | static struct pim_upstream *pim_upstream_new(struct pim_instance *pim, |
675 | struct prefix_sg *sg, | |
676 | struct interface *incoming, | |
0885a9f1 DS |
677 | int flags, |
678 | struct pim_ifchannel *ch) | |
12e41d03 | 679 | { |
d62a17ae | 680 | enum pim_rpf_result rpf_result; |
681 | struct pim_interface *pim_ifp; | |
682 | struct pim_upstream *up; | |
683 | ||
684 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); | |
d62a17ae | 685 | |
686 | up->sg = *sg; | |
687 | pim_str_sg_set(sg, up->sg_str); | |
0885a9f1 DS |
688 | if (ch) |
689 | ch->upstream = up; | |
690 | ||
9b29ea95 | 691 | up = hash_get(pim->upstream_hash, up, hash_alloc_intern); |
732c209c SP |
692 | /* Set up->upstream_addr as INADDR_ANY, if RP is not |
693 | * configured and retain the upstream data structure | |
694 | */ | |
d9c9a9ee DS |
695 | if (!pim_rp_set_upstream_addr(pim, &up->upstream_addr, sg->src, |
696 | sg->grp)) { | |
d62a17ae | 697 | if (PIM_DEBUG_TRACE) |
698 | zlog_debug("%s: Received a (*,G) with no RP configured", | |
699 | __PRETTY_FUNCTION__); | |
d62a17ae | 700 | } |
701 | ||
9b29ea95 | 702 | up->parent = pim_upstream_find_parent(pim, up); |
d62a17ae | 703 | if (up->sg.src.s_addr == INADDR_ANY) { |
704 | up->sources = list_new(); | |
705 | up->sources->cmp = pim_upstream_compare; | |
706 | } else | |
707 | up->sources = NULL; | |
708 | ||
9b29ea95 | 709 | pim_upstream_find_new_children(pim, up); |
d62a17ae | 710 | up->flags = flags; |
711 | up->ref_count = 1; | |
712 | up->t_join_timer = NULL; | |
713 | up->t_ka_timer = NULL; | |
714 | up->t_rs_timer = NULL; | |
715 | up->t_msdp_reg_timer = NULL; | |
716 | up->join_state = PIM_UPSTREAM_NOTJOINED; | |
717 | up->reg_state = PIM_REG_NOINFO; | |
718 | up->state_transition = pim_time_monotonic_sec(); | |
719 | up->channel_oil = NULL; | |
720 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; | |
721 | ||
722 | up->rpf.source_nexthop.interface = NULL; | |
723 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; | |
724 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = | |
725 | PIM_NET_INADDR_ANY; | |
726 | up->rpf.source_nexthop.mrib_metric_preference = | |
d17612dd | 727 | router->infinite_assert_metric.metric_preference; |
d62a17ae | 728 | up->rpf.source_nexthop.mrib_route_metric = |
d17612dd | 729 | router->infinite_assert_metric.route_metric; |
d62a17ae | 730 | up->rpf.rpf_addr.family = AF_INET; |
731 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
732 | ||
733 | up->ifchannels = list_new(); | |
734 | up->ifchannels->cmp = (int (*)(void *, void *))pim_ifchannel_compare; | |
735 | ||
736 | if (up->sg.src.s_addr != INADDR_ANY) | |
9b29ea95 | 737 | wheel_add_item(pim->upstream_sg_wheel, up); |
d62a17ae | 738 | |
6a5de0ad AK |
739 | if (PIM_UPSTREAM_FLAG_TEST_STATIC_IIF(up->flags)) { |
740 | pim_upstream_fill_static_iif(up, incoming); | |
741 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
742 | assert(pim_ifp); | |
743 | up->channel_oil = pim_channel_oil_add(pim, | |
744 | &up->sg, pim_ifp->mroute_vif_index); | |
745 | } else if (up->upstream_addr.s_addr == INADDR_ANY) { | |
732c209c SP |
746 | /* Create a dummmy channel oil with incoming ineterface MAXVIFS, |
747 | * since RP is not configured | |
748 | */ | |
749 | up->channel_oil = pim_channel_oil_add(pim, &up->sg, MAXVIFS); | |
d62a17ae | 750 | |
6a5de0ad | 751 | } else { |
732c209c SP |
752 | rpf_result = pim_rpf_update(pim, up, NULL, 1); |
753 | if (rpf_result == PIM_RPF_FAILURE) { | |
754 | if (PIM_DEBUG_TRACE) | |
755 | zlog_debug( | |
756 | "%s: Attempting to create upstream(%s), Unable to RPF for source", | |
757 | __PRETTY_FUNCTION__, up->sg_str); | |
758 | /* Create a dummmy channel oil with incoming ineterface | |
759 | * MAXVIFS, since RP is not reachable | |
760 | */ | |
761 | up->channel_oil = pim_channel_oil_add( | |
762 | pim, &up->sg, MAXVIFS); | |
d62a17ae | 763 | } |
764 | ||
732c209c SP |
765 | if (up->rpf.source_nexthop.interface) { |
766 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
767 | if (pim_ifp) | |
768 | up->channel_oil = pim_channel_oil_add(pim, | |
769 | &up->sg, pim_ifp->mroute_vif_index); | |
770 | } | |
d62a17ae | 771 | } |
772 | ||
9b29ea95 | 773 | listnode_add_sort(pim->upstream_list, up); |
d62a17ae | 774 | |
775 | if (PIM_DEBUG_TRACE) { | |
776 | zlog_debug( | |
777 | "%s: Created Upstream %s upstream_addr %s ref count %d increment", | |
778 | __PRETTY_FUNCTION__, up->sg_str, | |
779 | inet_ntoa(up->upstream_addr), up->ref_count); | |
780 | } | |
781 | ||
782 | return up; | |
12e41d03 DL |
783 | } |
784 | ||
9b29ea95 DS |
785 | struct pim_upstream *pim_upstream_find(struct pim_instance *pim, |
786 | struct prefix_sg *sg) | |
12e41d03 | 787 | { |
d62a17ae | 788 | struct pim_upstream lookup; |
789 | struct pim_upstream *up = NULL; | |
12e41d03 | 790 | |
d62a17ae | 791 | lookup.sg = *sg; |
9b29ea95 | 792 | up = hash_lookup(pim->upstream_hash, &lookup); |
d62a17ae | 793 | return up; |
12e41d03 DL |
794 | } |
795 | ||
d62a17ae | 796 | struct pim_upstream *pim_upstream_find_or_add(struct prefix_sg *sg, |
797 | struct interface *incoming, | |
798 | int flags, const char *name) | |
e711cd3c | 799 | { |
d62a17ae | 800 | struct pim_upstream *up; |
9b29ea95 DS |
801 | struct pim_interface *pim_ifp; |
802 | ||
803 | pim_ifp = incoming->info; | |
d62a17ae | 804 | |
9b29ea95 | 805 | up = pim_upstream_find(pim_ifp->pim, sg); |
d62a17ae | 806 | |
807 | if (up) { | |
808 | if (!(up->flags & flags)) { | |
809 | up->flags |= flags; | |
810 | up->ref_count++; | |
811 | if (PIM_DEBUG_TRACE) | |
812 | zlog_debug( | |
813 | "%s(%s): upstream %s ref count %d increment", | |
814 | __PRETTY_FUNCTION__, name, up->sg_str, | |
815 | up->ref_count); | |
816 | } | |
817 | } else | |
0885a9f1 DS |
818 | up = pim_upstream_add(pim_ifp->pim, sg, incoming, flags, name, |
819 | NULL); | |
d62a17ae | 820 | |
821 | return up; | |
e711cd3c DS |
822 | } |
823 | ||
d62a17ae | 824 | void pim_upstream_ref(struct pim_upstream *up, int flags, const char *name) |
1bf16443 | 825 | { |
d62a17ae | 826 | up->flags |= flags; |
827 | ++up->ref_count; | |
828 | if (PIM_DEBUG_TRACE) | |
829 | zlog_debug("%s(%s): upstream %s ref count %d increment", | |
830 | __PRETTY_FUNCTION__, name, up->sg_str, | |
831 | up->ref_count); | |
1bf16443 | 832 | } |
833 | ||
2002dcdb DS |
834 | struct pim_upstream *pim_upstream_add(struct pim_instance *pim, |
835 | struct prefix_sg *sg, | |
d62a17ae | 836 | struct interface *incoming, int flags, |
0885a9f1 DS |
837 | const char *name, |
838 | struct pim_ifchannel *ch) | |
12e41d03 | 839 | { |
d62a17ae | 840 | struct pim_upstream *up = NULL; |
841 | int found = 0; | |
9b29ea95 | 842 | |
2002dcdb | 843 | up = pim_upstream_find(pim, sg); |
d62a17ae | 844 | if (up) { |
845 | pim_upstream_ref(up, flags, name); | |
846 | found = 1; | |
847 | } else { | |
0885a9f1 | 848 | up = pim_upstream_new(pim, sg, incoming, flags, ch); |
d62a17ae | 849 | } |
850 | ||
851 | if (PIM_DEBUG_TRACE) { | |
852 | if (up) { | |
853 | char buf[PREFIX2STR_BUFFER]; | |
854 | prefix2str(&up->rpf.rpf_addr, buf, sizeof(buf)); | |
855 | zlog_debug("%s(%s): %s, iif %s (%s) found: %d: ref_count: %d", | |
f4075cb4 | 856 | __PRETTY_FUNCTION__, name, |
55785900 | 857 | up->sg_str, buf, up->rpf.source_nexthop.interface ? |
957d93ea | 858 | up->rpf.source_nexthop.interface->name : "Unknown" , |
55785900 | 859 | found, up->ref_count); |
d62a17ae | 860 | } else |
861 | zlog_debug("%s(%s): (%s) failure to create", | |
862 | __PRETTY_FUNCTION__, name, | |
863 | pim_str_sg_dump(sg)); | |
864 | } | |
12e41d03 | 865 | |
d62a17ae | 866 | return up; |
12e41d03 DL |
867 | } |
868 | ||
c8fc07cb DS |
869 | /* |
870 | * Passed in up must be the upstream for ch. starch is NULL if no | |
871 | * information | |
872 | */ | |
d62a17ae | 873 | int pim_upstream_evaluate_join_desired_interface(struct pim_upstream *up, |
874 | struct pim_ifchannel *ch, | |
875 | struct pim_ifchannel *starch) | |
7a3ddda5 | 876 | { |
d62a17ae | 877 | if (ch) { |
878 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
879 | return 0; | |
880 | ||
881 | if (!pim_macro_ch_lost_assert(ch) | |
882 | && pim_macro_chisin_joins_or_include(ch)) | |
883 | return 1; | |
884 | } | |
885 | ||
886 | /* | |
887 | * joins (*,G) | |
888 | */ | |
889 | if (starch) { | |
890 | if (PIM_IF_FLAG_TEST_S_G_RPT(starch->upstream->flags)) | |
891 | return 0; | |
892 | ||
893 | if (!pim_macro_ch_lost_assert(starch) | |
894 | && pim_macro_chisin_joins_or_include(starch)) | |
895 | return 1; | |
896 | } | |
897 | ||
898 | return 0; | |
7a3ddda5 DS |
899 | } |
900 | ||
12e41d03 DL |
901 | /* |
902 | Evaluate JoinDesired(S,G): | |
903 | ||
904 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
905 | in the set: | |
906 | ||
907 | inherited_olist(S,G) = | |
908 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
909 | ||
910 | JoinDesired(S,G) may be affected by changes in the following: | |
911 | ||
912 | pim_ifp->primary_address | |
913 | pim_ifp->pim_dr_addr | |
914 | ch->ifassert_winner_metric | |
915 | ch->ifassert_winner | |
d62a17ae | 916 | ch->local_ifmembership |
12e41d03 DL |
917 | ch->ifjoin_state |
918 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
919 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
920 | ch->upstream->rpf.source_nexthop.interface | |
921 | ||
922 | See also pim_upstream_update_join_desired() below. | |
923 | */ | |
9b29ea95 DS |
924 | int pim_upstream_evaluate_join_desired(struct pim_instance *pim, |
925 | struct pim_upstream *up) | |
12e41d03 | 926 | { |
d62a17ae | 927 | struct interface *ifp; |
d62a17ae | 928 | struct pim_ifchannel *ch, *starch; |
929 | struct pim_upstream *starup = up->parent; | |
930 | int ret = 0; | |
12e41d03 | 931 | |
451fda4f | 932 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
d62a17ae | 933 | if (!ifp->info) |
934 | continue; | |
c8fc07cb | 935 | |
d62a17ae | 936 | ch = pim_ifchannel_find(ifp, &up->sg); |
c8fc07cb | 937 | |
d62a17ae | 938 | if (starup) |
939 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
940 | else | |
941 | starch = NULL; | |
c8fc07cb | 942 | |
d62a17ae | 943 | if (!ch && !starch) |
944 | continue; | |
12e41d03 | 945 | |
d62a17ae | 946 | ret += pim_upstream_evaluate_join_desired_interface(up, ch, |
947 | starch); | |
948 | } /* scan iface channel list */ | |
12e41d03 | 949 | |
d62a17ae | 950 | return ret; /* false */ |
12e41d03 DL |
951 | } |
952 | ||
953 | /* | |
954 | See also pim_upstream_evaluate_join_desired() above. | |
955 | */ | |
9b29ea95 DS |
956 | void pim_upstream_update_join_desired(struct pim_instance *pim, |
957 | struct pim_upstream *up) | |
12e41d03 | 958 | { |
d62a17ae | 959 | int was_join_desired; /* boolean */ |
960 | int is_join_desired; /* boolean */ | |
961 | ||
962 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
963 | ||
9b29ea95 | 964 | is_join_desired = pim_upstream_evaluate_join_desired(pim, up); |
d62a17ae | 965 | if (is_join_desired) |
966 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
967 | else | |
968 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
969 | ||
970 | /* switched from false to true */ | |
47e3ce59 | 971 | if (is_join_desired && (up->join_state == PIM_UPSTREAM_NOTJOINED)) { |
1eca8576 | 972 | pim_upstream_switch(pim, up, PIM_UPSTREAM_JOINED); |
d62a17ae | 973 | return; |
974 | } | |
975 | ||
976 | /* switched from true to false */ | |
977 | if (!is_join_desired && was_join_desired) { | |
1eca8576 | 978 | pim_upstream_switch(pim, up, PIM_UPSTREAM_NOTJOINED); |
d62a17ae | 979 | return; |
980 | } | |
12e41d03 DL |
981 | } |
982 | ||
983 | /* | |
984 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
985 | Transitions from Joined State | |
986 | RPF'(S,G) GenID changes | |
987 | ||
988 | The upstream (S,G) state machine remains in Joined state. If the | |
989 | Join Timer is set to expire in more than t_override seconds, reset | |
990 | it so that it expires after t_override seconds. | |
991 | */ | |
9b29ea95 DS |
992 | void pim_upstream_rpf_genid_changed(struct pim_instance *pim, |
993 | struct in_addr neigh_addr) | |
12e41d03 | 994 | { |
d62a17ae | 995 | struct listnode *up_node; |
996 | struct listnode *up_nextnode; | |
997 | struct pim_upstream *up; | |
998 | ||
999 | /* | |
1000 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
1001 | */ | |
9b29ea95 | 1002 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { |
d62a17ae | 1003 | |
1004 | if (PIM_DEBUG_TRACE) { | |
1005 | char neigh_str[INET_ADDRSTRLEN]; | |
1006 | char rpf_addr_str[PREFIX_STRLEN]; | |
1007 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, | |
1008 | sizeof(neigh_str)); | |
1009 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, | |
1010 | sizeof(rpf_addr_str)); | |
1011 | zlog_debug( | |
8dbdb215 | 1012 | "%s: matching neigh=%s against upstream (S,G)=%s[%s] joined=%d rpf_addr=%s", |
996c9314 LB |
1013 | __PRETTY_FUNCTION__, neigh_str, up->sg_str, |
1014 | pim->vrf->name, | |
d62a17ae | 1015 | up->join_state == PIM_UPSTREAM_JOINED, |
1016 | rpf_addr_str); | |
1017 | } | |
1018 | ||
1019 | /* consider only (S,G) upstream in Joined state */ | |
1020 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
1021 | continue; | |
1022 | ||
1023 | /* match RPF'(S,G)=neigh_addr */ | |
1024 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) | |
1025 | continue; | |
1026 | ||
1027 | pim_upstream_join_timer_decrease_to_t_override( | |
1028 | "RPF'(S,G) GenID change", up); | |
1029 | } | |
12e41d03 DL |
1030 | } |
1031 | ||
1032 | ||
1033 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
1034 | struct interface *old_rpf_ifp) | |
1035 | { | |
d62a17ae | 1036 | struct listnode *chnode; |
1037 | struct listnode *chnextnode; | |
1038 | struct pim_ifchannel *ch; | |
1039 | ||
1040 | /* search all ifchannels */ | |
1041 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1042 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
1043 | if ( | |
1044 | /* RPF_interface(S) was NOT I */ | |
1045 | (old_rpf_ifp == ch->interface) && | |
1046 | /* RPF_interface(S) stopped being I */ | |
1047 | (ch->upstream->rpf.source_nexthop | |
957d93ea SP |
1048 | .interface) && |
1049 | (ch->upstream->rpf.source_nexthop | |
1050 | .interface != ch->interface)) { | |
d62a17ae | 1051 | assert_action_a5(ch); |
1052 | } | |
1053 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
1054 | ||
1055 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1056 | } | |
12e41d03 DL |
1057 | } |
1058 | ||
1059 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
1060 | { | |
d62a17ae | 1061 | struct listnode *chnode; |
1062 | struct listnode *chnextnode; | |
1063 | struct pim_ifchannel *ch; | |
1064 | ||
1065 | /* scan per-interface (S,G) state */ | |
1066 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1067 | pim_ifchannel_update_could_assert(ch); | |
1068 | } /* scan iface channel list */ | |
12e41d03 DL |
1069 | } |
1070 | ||
1071 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
1072 | { | |
d62a17ae | 1073 | struct listnode *chnode; |
1074 | struct listnode *chnextnode; | |
1075 | struct pim_ifchannel *ch; | |
12e41d03 | 1076 | |
d62a17ae | 1077 | /* scan per-interface (S,G) state */ |
1078 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1079 | pim_ifchannel_update_my_assert_metric(ch); | |
12e41d03 | 1080 | |
d62a17ae | 1081 | } /* scan iface channel list */ |
12e41d03 DL |
1082 | } |
1083 | ||
1084 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
1085 | { | |
d62a17ae | 1086 | struct listnode *chnode; |
1087 | struct listnode *chnextnode; | |
1088 | struct pim_interface *pim_ifp; | |
1089 | struct pim_ifchannel *ch; | |
1090 | ||
1091 | /* scan per-interface (S,G) state */ | |
1092 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1093 | if (!ch->interface) | |
1094 | continue; | |
1095 | pim_ifp = ch->interface->info; | |
1096 | if (!pim_ifp) | |
1097 | continue; | |
1098 | ||
1099 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1100 | ||
1101 | } /* scan iface channel list */ | |
12e41d03 | 1102 | } |
f14248dd | 1103 | |
1bf16443 | 1104 | /* When kat is stopped CouldRegister goes to false so we need to |
1105 | * transition the (S, G) on FHR to NI state and remove reg tunnel | |
1106 | * from the OIL */ | |
9b29ea95 DS |
1107 | static void pim_upstream_fhr_kat_expiry(struct pim_instance *pim, |
1108 | struct pim_upstream *up) | |
1bf16443 | 1109 | { |
d62a17ae | 1110 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
1111 | return; | |
1112 | ||
1113 | if (PIM_DEBUG_TRACE) | |
1114 | zlog_debug("kat expired on %s; clear fhr reg state", | |
1115 | up->sg_str); | |
1116 | ||
1117 | /* stop reg-stop timer */ | |
1118 | THREAD_OFF(up->t_rs_timer); | |
1119 | /* remove regiface from the OIL if it is there*/ | |
9b29ea95 | 1120 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1121 | PIM_OIF_FLAG_PROTO_PIM); |
1122 | /* clear the register state */ | |
1123 | up->reg_state = PIM_REG_NOINFO; | |
1124 | PIM_UPSTREAM_FLAG_UNSET_FHR(up->flags); | |
1bf16443 | 1125 | } |
1126 | ||
1127 | /* When kat is started CouldRegister can go to true. And if it does we | |
1128 | * need to transition the (S, G) on FHR to JOINED state and add reg tunnel | |
1129 | * to the OIL */ | |
1130 | static void pim_upstream_fhr_kat_start(struct pim_upstream *up) | |
1131 | { | |
d62a17ae | 1132 | if (pim_upstream_could_register(up)) { |
1133 | if (PIM_DEBUG_TRACE) | |
1134 | zlog_debug( | |
1135 | "kat started on %s; set fhr reg state to joined", | |
1136 | up->sg_str); | |
1137 | ||
1138 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
1139 | if (up->reg_state == PIM_REG_NOINFO) | |
1140 | pim_register_join(up); | |
1141 | } | |
1bf16443 | 1142 | } |
1143 | ||
f14248dd DS |
1144 | /* |
1145 | * On an RP, the PMBR value must be cleared when the | |
1146 | * Keepalive Timer expires | |
1bf16443 | 1147 | * KAT expiry indicates that flow is inactive. If the flow was created or |
1148 | * maintained by activity now is the time to deref it. | |
f14248dd | 1149 | */ |
ff459c36 AK |
1150 | struct pim_upstream *pim_upstream_keep_alive_timer_proc( |
1151 | struct pim_upstream *up) | |
f14248dd | 1152 | { |
8e5f97e3 | 1153 | struct pim_instance *pim; |
d62a17ae | 1154 | |
8e5f97e3 | 1155 | pim = up->channel_oil->pim; |
d62a17ae | 1156 | |
820b4a40 AK |
1157 | if (PIM_UPSTREAM_FLAG_TEST_DISABLE_KAT_EXPIRY(up->flags)) { |
1158 | /* if the router is a PIM vxlan encapsulator we prevent expiry | |
1159 | * of KAT as the mroute is pre-setup without any traffic | |
1160 | */ | |
1161 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); | |
ff459c36 | 1162 | return up; |
820b4a40 AK |
1163 | } |
1164 | ||
8e5f97e3 | 1165 | if (I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 1166 | pim_br_clear_pmbr(&up->sg); |
1167 | /* | |
1168 | * We need to do more here :) | |
1169 | * But this is the start. | |
1170 | */ | |
1171 | } | |
1172 | ||
1173 | /* source is no longer active - pull the SA from MSDP's cache */ | |
472ad383 | 1174 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 1175 | |
1176 | /* if entry was created because of activity we need to deref it */ | |
1177 | if (PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
8e5f97e3 | 1178 | pim_upstream_fhr_kat_expiry(pim, up); |
d62a17ae | 1179 | if (PIM_DEBUG_TRACE) |
996c9314 LB |
1180 | zlog_debug( |
1181 | "kat expired on %s[%s]; remove stream reference", | |
1182 | up->sg_str, pim->vrf->name); | |
d62a17ae | 1183 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(up->flags); |
ff459c36 | 1184 | up = pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
d62a17ae | 1185 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) { |
8022df6a DS |
1186 | struct pim_upstream *parent = up->parent; |
1187 | ||
d62a17ae | 1188 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(up->flags); |
ff459c36 | 1189 | up = pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
8022df6a DS |
1190 | |
1191 | if (parent) { | |
996c9314 LB |
1192 | pim_jp_agg_single_upstream_send(&parent->rpf, parent, |
1193 | true); | |
8022df6a | 1194 | } |
d62a17ae | 1195 | } |
1196 | ||
ff459c36 AK |
1197 | return up; |
1198 | } | |
1199 | static int pim_upstream_keep_alive_timer(struct thread *t) | |
1200 | { | |
1201 | struct pim_upstream *up; | |
1202 | ||
1203 | up = THREAD_ARG(t); | |
1204 | ||
1205 | pim_upstream_keep_alive_timer_proc(up); | |
d62a17ae | 1206 | return 0; |
f14248dd DS |
1207 | } |
1208 | ||
d62a17ae | 1209 | void pim_upstream_keep_alive_timer_start(struct pim_upstream *up, uint32_t time) |
f14248dd | 1210 | { |
d62a17ae | 1211 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { |
1212 | if (PIM_DEBUG_TRACE) | |
1213 | zlog_debug("kat start on %s with no stream reference", | |
1214 | up->sg_str); | |
1215 | } | |
1216 | THREAD_OFF(up->t_ka_timer); | |
36417fcc DS |
1217 | thread_add_timer(router->master, pim_upstream_keep_alive_timer, up, |
1218 | time, &up->t_ka_timer); | |
d62a17ae | 1219 | |
1220 | /* any time keepalive is started against a SG we will have to | |
1221 | * re-evaluate our active source database */ | |
1222 | pim_msdp_sa_local_update(up); | |
1bf16443 | 1223 | } |
1224 | ||
1225 | /* MSDP on RP needs to know if a source is registerable to this RP */ | |
d62a17ae | 1226 | static int pim_upstream_msdp_reg_timer(struct thread *t) |
1bf16443 | 1227 | { |
472ad383 DS |
1228 | struct pim_upstream *up = THREAD_ARG(t); |
1229 | struct pim_instance *pim = up->channel_oil->pim; | |
1bf16443 | 1230 | |
d62a17ae | 1231 | /* source is no longer active - pull the SA from MSDP's cache */ |
472ad383 | 1232 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 1233 | return 1; |
1bf16443 | 1234 | } |
d62a17ae | 1235 | void pim_upstream_msdp_reg_timer_start(struct pim_upstream *up) |
1bf16443 | 1236 | { |
d62a17ae | 1237 | THREAD_OFF(up->t_msdp_reg_timer); |
36417fcc | 1238 | thread_add_timer(router->master, pim_upstream_msdp_reg_timer, up, |
d62a17ae | 1239 | PIM_MSDP_REG_RXED_PERIOD, &up->t_msdp_reg_timer); |
1bf16443 | 1240 | |
d62a17ae | 1241 | pim_msdp_sa_local_update(up); |
f14248dd | 1242 | } |
cb40b272 DS |
1243 | |
1244 | /* | |
1245 | * 4.2.1 Last-Hop Switchover to the SPT | |
1246 | * | |
1247 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
1248 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
1249 | * router, it has the option of switching to receive the traffic on a | |
1250 | * shortest path tree (SPT). | |
1251 | * | |
1252 | * The decision for a router to switch to the SPT is controlled as | |
1253 | * follows: | |
1254 | * | |
1255 | * void | |
1256 | * CheckSwitchToSpt(S,G) { | |
1257 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
1258 | * (+) pim_include(S,G) != NULL ) | |
1259 | * AND SwitchToSptDesired(S,G) ) { | |
1260 | * # Note: Restarting the KAT will result in the SPT switch | |
1261 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1262 | * } | |
1263 | * } | |
1264 | * | |
1265 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
1266 | * defined. An "infinite threshold" policy can be implemented by making | |
1267 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
1268 | * first packet" policy can be implemented by making | |
1269 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
1270 | * received for the source and group. | |
1271 | */ | |
8e5f97e3 DS |
1272 | int pim_upstream_switch_to_spt_desired(struct pim_instance *pim, |
1273 | struct prefix_sg *sg) | |
cb40b272 | 1274 | { |
8e5f97e3 | 1275 | if (I_am_RP(pim, sg->grp)) |
d62a17ae | 1276 | return 1; |
a3b58b4a | 1277 | |
d62a17ae | 1278 | return 0; |
cb40b272 | 1279 | } |
d7259eac | 1280 | |
d62a17ae | 1281 | int pim_upstream_is_sg_rpt(struct pim_upstream *up) |
80d9c3a0 | 1282 | { |
d62a17ae | 1283 | struct listnode *chnode; |
1284 | struct pim_ifchannel *ch; | |
f21597f0 | 1285 | |
d62a17ae | 1286 | for (ALL_LIST_ELEMENTS_RO(up->ifchannels, chnode, ch)) { |
1287 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
1288 | return 1; | |
1289 | } | |
e43b8697 | 1290 | |
d62a17ae | 1291 | return 0; |
80d9c3a0 | 1292 | } |
3a66b17b DS |
1293 | /* |
1294 | * After receiving a packet set SPTbit: | |
1295 | * void | |
1296 | * Update_SPTbit(S,G,iif) { | |
1297 | * if ( iif == RPF_interface(S) | |
1298 | * AND JoinDesired(S,G) == TRUE | |
1299 | * AND ( DirectlyConnected(S) == TRUE | |
1300 | * OR RPF_interface(S) != RPF_interface(RP(G)) | |
1301 | * OR inherited_olist(S,G,rpt) == NULL | |
1302 | * OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1303 | * ( RPF'(S,G) != NULL ) ) | |
1304 | * OR ( I_Am_Assert_Loser(S,G,iif) ) { | |
1305 | * Set SPTbit(S,G) to TRUE | |
1306 | * } | |
1307 | * } | |
1308 | */ | |
d62a17ae | 1309 | void pim_upstream_set_sptbit(struct pim_upstream *up, |
1310 | struct interface *incoming) | |
3a66b17b | 1311 | { |
d62a17ae | 1312 | struct pim_upstream *starup = up->parent; |
1313 | ||
1314 | // iif == RPF_interfvace(S) | |
1315 | if (up->rpf.source_nexthop.interface != incoming) { | |
1316 | if (PIM_DEBUG_TRACE) | |
1317 | zlog_debug( | |
1318 | "%s: Incoming Interface: %s is different than RPF_interface(S) %s", | |
1319 | __PRETTY_FUNCTION__, incoming->name, | |
1320 | up->rpf.source_nexthop.interface->name); | |
1321 | return; | |
1322 | } | |
1323 | ||
1324 | // AND JoinDesired(S,G) == TRUE | |
6f0f014f DS |
1325 | if (!pim_upstream_evaluate_join_desired(up->channel_oil->pim, up)) { |
1326 | if (PIM_DEBUG_TRACE) | |
1327 | zlog_debug("%s: %s Join is not Desired", | |
1328 | __PRETTY_FUNCTION__, up->sg_str); | |
1329 | return; | |
1330 | } | |
d62a17ae | 1331 | |
1332 | // DirectlyConnected(S) == TRUE | |
1333 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1334 | up->sg.src)) { | |
1335 | if (PIM_DEBUG_TRACE) | |
1336 | zlog_debug("%s: %s is directly connected to the source", | |
1337 | __PRETTY_FUNCTION__, up->sg_str); | |
1338 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1339 | return; | |
1340 | } | |
1341 | ||
1342 | // OR RPF_interface(S) != RPF_interface(RP(G)) | |
1343 | if (!starup | |
1344 | || up->rpf.source_nexthop | |
1345 | .interface != starup->rpf.source_nexthop.interface) { | |
2de05c60 DS |
1346 | struct pim_upstream *starup = up->parent; |
1347 | ||
d62a17ae | 1348 | if (PIM_DEBUG_TRACE) |
1349 | zlog_debug( | |
1350 | "%s: %s RPF_interface(S) != RPF_interface(RP(G))", | |
1351 | __PRETTY_FUNCTION__, up->sg_str); | |
1352 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
2de05c60 DS |
1353 | |
1354 | pim_jp_agg_single_upstream_send(&starup->rpf, starup, true); | |
d62a17ae | 1355 | return; |
1356 | } | |
1357 | ||
1358 | // OR inherited_olist(S,G,rpt) == NULL | |
1359 | if (pim_upstream_is_sg_rpt(up) | |
1360 | && pim_upstream_empty_inherited_olist(up)) { | |
1361 | if (PIM_DEBUG_TRACE) | |
1362 | zlog_debug("%s: %s OR inherited_olist(S,G,rpt) == NULL", | |
1363 | __PRETTY_FUNCTION__, up->sg_str); | |
1364 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1365 | return; | |
1366 | } | |
1367 | ||
1368 | // OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1369 | // ( RPF'(S,G) != NULL ) ) | |
1370 | if (up->parent && pim_rpf_is_same(&up->rpf, &up->parent->rpf)) { | |
1371 | if (PIM_DEBUG_TRACE) | |
1372 | zlog_debug("%s: %s RPF'(S,G) is the same as RPF'(*,G)", | |
1373 | __PRETTY_FUNCTION__, up->sg_str); | |
1374 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1375 | return; | |
1376 | } | |
1377 | ||
1378 | return; | |
3a66b17b | 1379 | } |
80d9c3a0 | 1380 | |
d62a17ae | 1381 | const char *pim_upstream_state2str(enum pim_upstream_state join_state) |
d7259eac | 1382 | { |
d62a17ae | 1383 | switch (join_state) { |
1384 | case PIM_UPSTREAM_NOTJOINED: | |
1385 | return "NotJoined"; | |
1386 | break; | |
1387 | case PIM_UPSTREAM_JOINED: | |
1388 | return "Joined"; | |
1389 | break; | |
1390 | } | |
1391 | return "Unknown"; | |
d7259eac | 1392 | } |
627ed2a3 | 1393 | |
d62a17ae | 1394 | const char *pim_reg_state2str(enum pim_reg_state reg_state, char *state_str) |
e0e127b0 | 1395 | { |
d62a17ae | 1396 | switch (reg_state) { |
1397 | case PIM_REG_NOINFO: | |
1398 | strcpy(state_str, "RegNoInfo"); | |
1399 | break; | |
1400 | case PIM_REG_JOIN: | |
1401 | strcpy(state_str, "RegJoined"); | |
1402 | break; | |
1403 | case PIM_REG_JOIN_PENDING: | |
1404 | strcpy(state_str, "RegJoinPend"); | |
1405 | break; | |
1406 | case PIM_REG_PRUNE: | |
1407 | strcpy(state_str, "RegPrune"); | |
1408 | break; | |
1409 | default: | |
1410 | strcpy(state_str, "RegUnknown"); | |
1411 | } | |
1412 | return state_str; | |
e0e127b0 | 1413 | } |
1414 | ||
d62a17ae | 1415 | static int pim_upstream_register_stop_timer(struct thread *t) |
627ed2a3 | 1416 | { |
d62a17ae | 1417 | struct pim_interface *pim_ifp; |
8e5f97e3 | 1418 | struct pim_instance *pim; |
d62a17ae | 1419 | struct pim_upstream *up; |
d62a17ae | 1420 | up = THREAD_ARG(t); |
8e5f97e3 | 1421 | pim = up->channel_oil->pim; |
d62a17ae | 1422 | |
1423 | if (PIM_DEBUG_TRACE) { | |
1424 | char state_str[PIM_REG_STATE_STR_LEN]; | |
8dbdb215 DS |
1425 | zlog_debug("%s: (S,G)=%s[%s] upstream register stop timer %s", |
1426 | __PRETTY_FUNCTION__, up->sg_str, pim->vrf->name, | |
d62a17ae | 1427 | pim_reg_state2str(up->reg_state, state_str)); |
1428 | } | |
1429 | ||
1430 | switch (up->reg_state) { | |
1431 | case PIM_REG_JOIN_PENDING: | |
1432 | up->reg_state = PIM_REG_JOIN; | |
8e5f97e3 | 1433 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1434 | PIM_OIF_FLAG_PROTO_PIM); |
b9f3a51c | 1435 | pim_vxlan_update_sg_reg_state(pim, up, TRUE /*reg_join*/); |
d62a17ae | 1436 | break; |
1437 | case PIM_REG_JOIN: | |
1438 | break; | |
1439 | case PIM_REG_PRUNE: | |
957d93ea SP |
1440 | if (!up->rpf.source_nexthop.interface) { |
1441 | if (PIM_DEBUG_TRACE) | |
1442 | zlog_debug("%s: up %s RPF is not present", | |
1443 | __PRETTY_FUNCTION__, up->sg_str); | |
1444 | return 0; | |
1445 | } | |
1446 | ||
d62a17ae | 1447 | pim_ifp = up->rpf.source_nexthop.interface->info; |
1448 | if (!pim_ifp) { | |
1449 | if (PIM_DEBUG_TRACE) | |
1450 | zlog_debug( | |
1451 | "%s: Interface: %s is not configured for pim", | |
1452 | __PRETTY_FUNCTION__, | |
1453 | up->rpf.source_nexthop.interface->name); | |
1454 | return 0; | |
1455 | } | |
1456 | up->reg_state = PIM_REG_JOIN_PENDING; | |
1457 | pim_upstream_start_register_stop_timer(up, 1); | |
1458 | ||
1459 | if (((up->channel_oil->cc.lastused / 100) | |
2f5b0028 | 1460 | > pim->keep_alive_time) |
d9c9a9ee | 1461 | && (I_am_RP(pim_ifp->pim, up->sg.grp))) { |
d62a17ae | 1462 | if (PIM_DEBUG_TRACE) |
1463 | zlog_debug( | |
1464 | "%s: Stop sending the register, because I am the RP and we haven't seen a packet in a while", | |
1465 | __PRETTY_FUNCTION__); | |
1466 | return 0; | |
1467 | } | |
aea1f845 | 1468 | pim_null_register_send(up); |
d62a17ae | 1469 | break; |
1470 | default: | |
1471 | break; | |
70e7fda8 | 1472 | } |
d62a17ae | 1473 | |
1474 | return 0; | |
627ed2a3 DS |
1475 | } |
1476 | ||
d62a17ae | 1477 | void pim_upstream_start_register_stop_timer(struct pim_upstream *up, |
1478 | int null_register) | |
627ed2a3 | 1479 | { |
d62a17ae | 1480 | uint32_t time; |
1481 | ||
1482 | THREAD_TIMER_OFF(up->t_rs_timer); | |
1483 | ||
1484 | if (!null_register) { | |
1485 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1486 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1487 | time = lower + (random() % (upper - lower + 1)) | |
1488 | - PIM_REGISTER_PROBE_PERIOD; | |
1489 | } else | |
1490 | time = PIM_REGISTER_PROBE_PERIOD; | |
1491 | ||
1492 | if (PIM_DEBUG_TRACE) { | |
1493 | zlog_debug( | |
1494 | "%s: (S,G)=%s Starting upstream register stop timer %d", | |
1495 | __PRETTY_FUNCTION__, up->sg_str, time); | |
1496 | } | |
36417fcc DS |
1497 | thread_add_timer(router->master, pim_upstream_register_stop_timer, up, |
1498 | time, &up->t_rs_timer); | |
627ed2a3 | 1499 | } |
4fdc8f36 | 1500 | |
9b29ea95 DS |
1501 | int pim_upstream_inherited_olist_decide(struct pim_instance *pim, |
1502 | struct pim_upstream *up) | |
4fdc8f36 | 1503 | { |
d62a17ae | 1504 | struct interface *ifp; |
1505 | struct pim_interface *pim_ifp = NULL; | |
1506 | struct pim_ifchannel *ch, *starch; | |
d62a17ae | 1507 | struct pim_upstream *starup = up->parent; |
1508 | int output_intf = 0; | |
1509 | ||
1510 | if (up->rpf.source_nexthop.interface) | |
1511 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
1512 | else { | |
1513 | if (PIM_DEBUG_TRACE) | |
1514 | zlog_debug("%s: up %s RPF is not present", | |
1515 | __PRETTY_FUNCTION__, up->sg_str); | |
1516 | } | |
1517 | if (pim_ifp && !up->channel_oil) | |
611925dc DS |
1518 | up->channel_oil = pim_channel_oil_add( |
1519 | pim, &up->sg, pim_ifp->mroute_vif_index); | |
d62a17ae | 1520 | |
451fda4f | 1521 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
d62a17ae | 1522 | if (!ifp->info) |
1523 | continue; | |
1524 | ||
1525 | ch = pim_ifchannel_find(ifp, &up->sg); | |
1526 | ||
1527 | if (starup) | |
1528 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
1529 | else | |
1530 | starch = NULL; | |
1531 | ||
1532 | if (!ch && !starch) | |
1533 | continue; | |
1534 | ||
1535 | if (pim_upstream_evaluate_join_desired_interface(up, ch, | |
1536 | starch)) { | |
1537 | int flag = PIM_OIF_FLAG_PROTO_PIM; | |
1538 | ||
1539 | if (!ch) | |
1540 | flag = PIM_OIF_FLAG_PROTO_STAR; | |
1541 | ||
1542 | pim_channel_add_oif(up->channel_oil, ifp, flag); | |
1543 | output_intf++; | |
1544 | } | |
1545 | } | |
1546 | ||
1547 | return output_intf; | |
b5183fd1 DS |
1548 | } |
1549 | ||
1550 | /* | |
1551 | * For a given upstream, determine the inherited_olist | |
1552 | * and apply it. | |
1553 | * | |
1554 | * inherited_olist(S,G,rpt) = | |
1555 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1556 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1557 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1558 | * | |
1559 | * inherited_olist(S,G) = | |
1560 | * inherited_olist(S,G,rpt) (+) | |
1561 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1562 | * | |
1563 | * return 1 if there are any output interfaces | |
1564 | * return 0 if there are not any output interfaces | |
1565 | */ | |
9b29ea95 DS |
1566 | int pim_upstream_inherited_olist(struct pim_instance *pim, |
1567 | struct pim_upstream *up) | |
b5183fd1 | 1568 | { |
9b29ea95 | 1569 | int output_intf = pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 1570 | |
1571 | /* | |
1572 | * If we have output_intf switch state to Join and work like normal | |
1573 | * If we don't have an output_intf that means we are probably a | |
1574 | * switch on a stick so turn on forwarding to just accept the | |
1575 | * incoming packets so we don't bother the other stuff! | |
1576 | */ | |
1577 | if (output_intf) | |
1eca8576 | 1578 | pim_upstream_switch(pim, up, PIM_UPSTREAM_JOINED); |
d62a17ae | 1579 | else |
1580 | forward_on(up); | |
1581 | ||
1582 | return output_intf; | |
4fdc8f36 | 1583 | } |
d3dd1804 | 1584 | |
d62a17ae | 1585 | int pim_upstream_empty_inherited_olist(struct pim_upstream *up) |
80d9c3a0 | 1586 | { |
d62a17ae | 1587 | return pim_channel_oil_empty(up->channel_oil); |
80d9c3a0 DS |
1588 | } |
1589 | ||
d3dd1804 DS |
1590 | /* |
1591 | * When we have a new neighbor, | |
1592 | * find upstreams that don't have their rpf_addr | |
1593 | * set and see if the new neighbor allows | |
1594 | * the join to be sent | |
1595 | */ | |
9b29ea95 | 1596 | void pim_upstream_find_new_rpf(struct pim_instance *pim) |
d3dd1804 | 1597 | { |
d62a17ae | 1598 | struct listnode *up_node; |
1599 | struct listnode *up_nextnode; | |
1600 | struct pim_upstream *up; | |
1601 | ||
1602 | /* | |
1603 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
1604 | */ | |
9b29ea95 | 1605 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { |
957d93ea SP |
1606 | if (up->upstream_addr.s_addr == INADDR_ANY) { |
1607 | if (PIM_DEBUG_TRACE) | |
1608 | zlog_debug( | |
1609 | "%s: RP not configured for Upstream %s", | |
1610 | __PRETTY_FUNCTION__, up->sg_str); | |
1611 | continue; | |
1612 | } | |
1613 | ||
d62a17ae | 1614 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { |
1615 | if (PIM_DEBUG_TRACE) | |
1616 | zlog_debug( | |
957d93ea SP |
1617 | "%s: Upstream %s without a path to send join, checking", |
1618 | __PRETTY_FUNCTION__, up->sg_str); | |
2002dcdb | 1619 | pim_rpf_update(pim, up, NULL, 1); |
d62a17ae | 1620 | } |
d3dd1804 | 1621 | } |
d3dd1804 | 1622 | } |
0f588989 | 1623 | |
7c591950 | 1624 | unsigned int pim_upstream_hash_key(void *arg) |
0f588989 | 1625 | { |
d62a17ae | 1626 | struct pim_upstream *up = (struct pim_upstream *)arg; |
0f588989 | 1627 | |
d62a17ae | 1628 | return jhash_2words(up->sg.src.s_addr, up->sg.grp.s_addr, 0); |
0f588989 DS |
1629 | } |
1630 | ||
9b29ea95 | 1631 | void pim_upstream_terminate(struct pim_instance *pim) |
0f588989 | 1632 | { |
172e45dc DS |
1633 | struct pim_upstream *up; |
1634 | ||
1635 | if (pim->upstream_list) { | |
1d483838 DS |
1636 | while (pim->upstream_list->count) { |
1637 | up = listnode_head(pim->upstream_list); | |
172e45dc | 1638 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
1d483838 | 1639 | } |
172e45dc | 1640 | |
6a154c88 | 1641 | list_delete(&pim->upstream_list); |
172e45dc | 1642 | } |
0f588989 | 1643 | |
9b29ea95 DS |
1644 | if (pim->upstream_hash) |
1645 | hash_free(pim->upstream_hash); | |
1646 | pim->upstream_hash = NULL; | |
0c68972d DS |
1647 | |
1648 | if (pim->upstream_sg_wheel) | |
1649 | wheel_delete(pim->upstream_sg_wheel); | |
1650 | pim->upstream_sg_wheel = NULL; | |
0f588989 DS |
1651 | } |
1652 | ||
74df8d6d | 1653 | bool pim_upstream_equal(const void *arg1, const void *arg2) |
0f588989 | 1654 | { |
d62a17ae | 1655 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
1656 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
0f588989 | 1657 | |
d62a17ae | 1658 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) |
1659 | && (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
74df8d6d | 1660 | return true; |
0f588989 | 1661 | |
74df8d6d | 1662 | return false; |
0f588989 DS |
1663 | } |
1664 | ||
1bf16443 | 1665 | /* rfc4601:section-4.2:"Data Packet Forwarding Rules" defines |
1666 | * the cases where kat has to be restarted on rxing traffic - | |
1667 | * | |
1668 | * if( DirectlyConnected(S) == TRUE AND iif == RPF_interface(S) ) { | |
1669 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1670 | * # Note: a register state transition or UpstreamJPState(S,G) | |
1671 | * # transition may happen as a result of restarting | |
1672 | * # KeepaliveTimer, and must be dealt with here. | |
1673 | * } | |
1674 | * if( iif == RPF_interface(S) AND UpstreamJPState(S,G) == Joined AND | |
1675 | * inherited_olist(S,G) != NULL ) { | |
1676 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1677 | * } | |
1678 | */ | |
1679 | static bool pim_upstream_kat_start_ok(struct pim_upstream *up) | |
1680 | { | |
8e5f97e3 DS |
1681 | struct pim_instance *pim = up->channel_oil->pim; |
1682 | ||
d62a17ae | 1683 | /* "iif == RPF_interface(S)" check has to be done by the kernel or hw |
1684 | * so we will skip that here */ | |
957d93ea SP |
1685 | if (up->rpf.source_nexthop.interface && |
1686 | pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
d62a17ae | 1687 | up->sg.src)) { |
1688 | return true; | |
1689 | } | |
1690 | ||
1691 | if ((up->join_state == PIM_UPSTREAM_JOINED) | |
1692 | && !pim_upstream_empty_inherited_olist(up)) { | |
1693 | /* XXX: I have added this RP check just for 3.2 and it's a | |
1694 | * digression from | |
1695 | * what rfc-4601 says. Till now we were only running KAT on FHR | |
1696 | * and RP and | |
1697 | * there is some angst around making the change to run it all | |
1698 | * routers that | |
1699 | * maintain the (S, G) state. This is tracked via CM-13601 and | |
1700 | * MUST be | |
1701 | * removed to handle spt turn-arounds correctly in a 3-tier clos | |
1702 | */ | |
8e5f97e3 | 1703 | if (I_am_RP(pim, up->sg.grp)) |
d62a17ae | 1704 | return true; |
1705 | } | |
1706 | ||
1707 | return false; | |
1bf16443 | 1708 | } |
1709 | ||
9c5e4d62 DS |
1710 | /* |
1711 | * Code to check and see if we've received packets on a S,G mroute | |
1712 | * and if so to set the SPT bit appropriately | |
1713 | */ | |
d62a17ae | 1714 | static void pim_upstream_sg_running(void *arg) |
9c5e4d62 | 1715 | { |
d62a17ae | 1716 | struct pim_upstream *up = (struct pim_upstream *)arg; |
8e5f97e3 | 1717 | struct pim_instance *pim = up->channel_oil->pim; |
d62a17ae | 1718 | |
1719 | // No packet can have arrived here if this is the case | |
8e5f97e3 | 1720 | if (!up->channel_oil->installed) { |
d62a17ae | 1721 | if (PIM_DEBUG_TRACE) |
41714081 | 1722 | zlog_debug("%s: %s%s is not installed in mroute", |
996c9314 LB |
1723 | __PRETTY_FUNCTION__, up->sg_str, |
1724 | pim->vrf->name); | |
d62a17ae | 1725 | return; |
1726 | } | |
1727 | ||
1728 | /* | |
1729 | * This is a bit of a hack | |
1730 | * We've noted that we should rescan but | |
1731 | * we've missed the window for doing so in | |
1732 | * pim_zebra.c for some reason. I am | |
1733 | * only doing this at this point in time | |
1734 | * to get us up and working for the moment | |
1735 | */ | |
1736 | if (up->channel_oil->oil_inherited_rescan) { | |
1737 | if (PIM_DEBUG_TRACE) | |
1738 | zlog_debug( | |
8dbdb215 | 1739 | "%s: Handling unscanned inherited_olist for %s[%s]", |
996c9314 LB |
1740 | __PRETTY_FUNCTION__, up->sg_str, |
1741 | pim->vrf->name); | |
8e5f97e3 | 1742 | pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 1743 | up->channel_oil->oil_inherited_rescan = 0; |
1744 | } | |
1745 | pim_mroute_update_counters(up->channel_oil); | |
1746 | ||
1747 | // Have we seen packets? | |
1748 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) | |
1749 | && (up->channel_oil->cc.lastused / 100 > 30)) { | |
1750 | if (PIM_DEBUG_TRACE) { | |
1751 | zlog_debug( | |
8dbdb215 DS |
1752 | "%s[%s]: %s old packet count is equal or lastused is greater than 30, (%ld,%ld,%lld)", |
1753 | __PRETTY_FUNCTION__, up->sg_str, pim->vrf->name, | |
d62a17ae | 1754 | up->channel_oil->cc.oldpktcnt, |
1755 | up->channel_oil->cc.pktcnt, | |
1756 | up->channel_oil->cc.lastused / 100); | |
1757 | } | |
1758 | return; | |
e43b8697 | 1759 | } |
d62a17ae | 1760 | |
1761 | if (pim_upstream_kat_start_ok(up)) { | |
1762 | /* Add a source reference to the stream if | |
1763 | * one doesn't already exist */ | |
1764 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
1765 | if (PIM_DEBUG_TRACE) | |
1766 | zlog_debug( | |
8dbdb215 DS |
1767 | "source reference created on kat restart %s[%s]", |
1768 | up->sg_str, pim->vrf->name); | |
d62a17ae | 1769 | |
1770 | pim_upstream_ref(up, PIM_UPSTREAM_FLAG_MASK_SRC_STREAM, | |
1771 | __PRETTY_FUNCTION__); | |
1772 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); | |
1773 | pim_upstream_fhr_kat_start(up); | |
1774 | } | |
19b807ca | 1775 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); |
d62a17ae | 1776 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) |
19b807ca | 1777 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); |
d62a17ae | 1778 | |
957d93ea SP |
1779 | if ((up->sptbit != PIM_UPSTREAM_SPTBIT_TRUE) && |
1780 | (up->rpf.source_nexthop.interface)) { | |
d62a17ae | 1781 | pim_upstream_set_sptbit(up, up->rpf.source_nexthop.interface); |
850a9f99 | 1782 | } |
d62a17ae | 1783 | return; |
9c5e4d62 DS |
1784 | } |
1785 | ||
9b29ea95 | 1786 | void pim_upstream_add_lhr_star_pimreg(struct pim_instance *pim) |
a7b2b1e2 | 1787 | { |
d62a17ae | 1788 | struct pim_upstream *up; |
1789 | struct listnode *node; | |
a7b2b1e2 | 1790 | |
9b29ea95 | 1791 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { |
d62a17ae | 1792 | if (up->sg.src.s_addr != INADDR_ANY) |
1793 | continue; | |
a7b2b1e2 | 1794 | |
d62a17ae | 1795 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) |
1796 | continue; | |
a7b2b1e2 | 1797 | |
9b29ea95 | 1798 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1799 | PIM_OIF_FLAG_PROTO_IGMP); |
1800 | } | |
a7b2b1e2 DS |
1801 | } |
1802 | ||
9b29ea95 DS |
1803 | void pim_upstream_spt_prefix_list_update(struct pim_instance *pim, |
1804 | struct prefix_list *pl) | |
df94f9a9 | 1805 | { |
d62a17ae | 1806 | const char *pname = prefix_list_name(pl); |
df94f9a9 | 1807 | |
9b29ea95 DS |
1808 | if (pim->spt.plist && strcmp(pim->spt.plist, pname) == 0) { |
1809 | pim_upstream_remove_lhr_star_pimreg(pim, pname); | |
d62a17ae | 1810 | } |
df94f9a9 DS |
1811 | } |
1812 | ||
1813 | /* | |
1814 | * nlist -> The new prefix list | |
1815 | * | |
1816 | * Per Group Application of pimreg to the OIL | |
1817 | * If the prefix list tells us DENY then | |
1818 | * we need to Switchover to SPT immediate | |
1819 | * so add the pimreg. | |
1820 | * If the prefix list tells us to ACCEPT than | |
1821 | * we need to Never do the SPT so remove | |
1822 | * the interface | |
1823 | * | |
1824 | */ | |
9b29ea95 DS |
1825 | void pim_upstream_remove_lhr_star_pimreg(struct pim_instance *pim, |
1826 | const char *nlist) | |
a7b2b1e2 | 1827 | { |
d62a17ae | 1828 | struct pim_upstream *up; |
1829 | struct listnode *node; | |
1830 | struct prefix_list *np; | |
1831 | struct prefix g; | |
1832 | enum prefix_list_type apply_new; | |
1833 | ||
1834 | np = prefix_list_lookup(AFI_IP, nlist); | |
1835 | ||
1836 | g.family = AF_INET; | |
1837 | g.prefixlen = IPV4_MAX_PREFIXLEN; | |
1838 | ||
9b29ea95 | 1839 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { |
d62a17ae | 1840 | if (up->sg.src.s_addr != INADDR_ANY) |
1841 | continue; | |
1842 | ||
1843 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) | |
1844 | continue; | |
1845 | ||
1846 | if (!nlist) { | |
9b29ea95 | 1847 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1848 | PIM_OIF_FLAG_PROTO_IGMP); |
1849 | continue; | |
1850 | } | |
1851 | g.u.prefix4 = up->sg.grp; | |
1852 | apply_new = prefix_list_apply(np, &g); | |
1853 | if (apply_new == PREFIX_DENY) | |
9b29ea95 | 1854 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1855 | PIM_OIF_FLAG_PROTO_IGMP); |
1856 | else | |
9b29ea95 | 1857 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1858 | PIM_OIF_FLAG_PROTO_IGMP); |
1859 | } | |
a7b2b1e2 DS |
1860 | } |
1861 | ||
9b29ea95 | 1862 | void pim_upstream_init(struct pim_instance *pim) |
0f588989 | 1863 | { |
c2cfa843 | 1864 | char name[64]; |
9fb302f4 | 1865 | |
c2cfa843 DS |
1866 | snprintf(name, 64, "PIM %s Timer Wheel", |
1867 | pim->vrf->name); | |
9b29ea95 | 1868 | pim->upstream_sg_wheel = |
36417fcc | 1869 | wheel_init(router->master, 31000, 100, pim_upstream_hash_key, |
c2cfa843 | 1870 | pim_upstream_sg_running, name); |
9fb302f4 | 1871 | |
c2cfa843 DS |
1872 | snprintf(name, 64, "PIM %s Upstream Hash", |
1873 | pim->vrf->name); | |
9b29ea95 | 1874 | pim->upstream_hash = hash_create_size(8192, pim_upstream_hash_key, |
c2cfa843 | 1875 | pim_upstream_equal, name); |
d62a17ae | 1876 | |
9b29ea95 | 1877 | pim->upstream_list = list_new(); |
9b29ea95 | 1878 | pim->upstream_list->cmp = pim_upstream_compare; |
0f588989 | 1879 | } |