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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 | } | |
affe9e99 | 85 | list_delete_and_null(&up->sources); |
cfa91a87 DS |
86 | } |
87 | ||
88 | /* | |
89 | * A (*,G) or a (*,*) is being created | |
90 | * Find the children that would point | |
91 | * at us. | |
92 | */ | |
9b29ea95 DS |
93 | static void pim_upstream_find_new_children(struct pim_instance *pim, |
94 | struct pim_upstream *up) | |
cfa91a87 | 95 | { |
d62a17ae | 96 | struct pim_upstream *child; |
97 | struct listnode *ch_node; | |
98 | ||
99 | if ((up->sg.src.s_addr != INADDR_ANY) | |
100 | && (up->sg.grp.s_addr != INADDR_ANY)) | |
101 | return; | |
102 | ||
103 | if ((up->sg.src.s_addr == INADDR_ANY) | |
104 | && (up->sg.grp.s_addr == INADDR_ANY)) | |
105 | return; | |
106 | ||
9b29ea95 | 107 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, ch_node, child)) { |
d62a17ae | 108 | if ((up->sg.grp.s_addr != INADDR_ANY) |
109 | && (child->sg.grp.s_addr == up->sg.grp.s_addr) | |
110 | && (child != up)) { | |
111 | child->parent = up; | |
112 | listnode_add_sort(up->sources, child); | |
113 | } | |
03417ccd | 114 | } |
cfa91a87 DS |
115 | } |
116 | ||
4d99418b DS |
117 | /* |
118 | * If we have a (*,*) || (S,*) there is no parent | |
119 | * If we have a (S,G), find the (*,G) | |
120 | * If we have a (*,G), find the (*,*) | |
121 | */ | |
9b29ea95 DS |
122 | static struct pim_upstream *pim_upstream_find_parent(struct pim_instance *pim, |
123 | struct pim_upstream *child) | |
4d99418b | 124 | { |
d62a17ae | 125 | struct prefix_sg any = child->sg; |
126 | struct pim_upstream *up = NULL; | |
4d99418b | 127 | |
d62a17ae | 128 | // (S,G) |
129 | if ((child->sg.src.s_addr != INADDR_ANY) | |
130 | && (child->sg.grp.s_addr != INADDR_ANY)) { | |
131 | any.src.s_addr = INADDR_ANY; | |
9b29ea95 | 132 | up = pim_upstream_find(pim, &any); |
03417ccd | 133 | |
d62a17ae | 134 | if (up) |
135 | listnode_add(up->sources, child); | |
03417ccd | 136 | |
d62a17ae | 137 | return up; |
138 | } | |
4d99418b | 139 | |
d62a17ae | 140 | return NULL; |
4d99418b DS |
141 | } |
142 | ||
12e41d03 DL |
143 | static void upstream_channel_oil_detach(struct pim_upstream *up) |
144 | { | |
d62a17ae | 145 | if (up->channel_oil) { |
146 | /* Detaching from channel_oil, channel_oil may exist post del, | |
147 | but upstream would not keep reference of it | |
148 | */ | |
13221cf2 | 149 | up->channel_oil->up = NULL; |
d62a17ae | 150 | pim_channel_oil_del(up->channel_oil); |
151 | up->channel_oil = NULL; | |
152 | } | |
12e41d03 DL |
153 | } |
154 | ||
9b29ea95 DS |
155 | struct pim_upstream *pim_upstream_del(struct pim_instance *pim, |
156 | struct pim_upstream *up, const char *name) | |
12e41d03 | 157 | { |
7692c5ae DS |
158 | struct listnode *node, *nnode; |
159 | struct pim_ifchannel *ch; | |
d62a17ae | 160 | bool notify_msdp = false; |
161 | struct prefix nht_p; | |
162 | ||
163 | if (PIM_DEBUG_TRACE) | |
164 | zlog_debug( | |
8dbdb215 | 165 | "%s(%s): Delete %s[%s] ref count: %d , flags: %d c_oil ref count %d (Pre decrement)", |
996c9314 LB |
166 | __PRETTY_FUNCTION__, name, up->sg_str, pim->vrf->name, |
167 | up->ref_count, up->flags, | |
168 | up->channel_oil->oil_ref_count); | |
d62a17ae | 169 | |
e83f3b31 | 170 | assert(up->ref_count > 0); |
171 | ||
d62a17ae | 172 | --up->ref_count; |
173 | ||
174 | if (up->ref_count >= 1) | |
175 | return up; | |
176 | ||
177 | THREAD_OFF(up->t_ka_timer); | |
178 | THREAD_OFF(up->t_rs_timer); | |
179 | THREAD_OFF(up->t_msdp_reg_timer); | |
180 | ||
181 | if (up->join_state == PIM_UPSTREAM_JOINED) { | |
182 | pim_jp_agg_single_upstream_send(&up->rpf, up, 0); | |
183 | ||
184 | if (up->sg.src.s_addr == INADDR_ANY) { | |
185 | /* if a (*, G) entry in the joined state is being | |
186 | * deleted we | |
187 | * need to notify MSDP */ | |
188 | notify_msdp = true; | |
189 | } | |
190 | } | |
191 | ||
192 | join_timer_stop(up); | |
193 | pim_jp_agg_upstream_verification(up, false); | |
194 | up->rpf.source_nexthop.interface = NULL; | |
195 | ||
196 | if (up->sg.src.s_addr != INADDR_ANY) { | |
391b8b08 DS |
197 | if (pim->upstream_sg_wheel) |
198 | wheel_remove_item(pim->upstream_sg_wheel, up); | |
d62a17ae | 199 | notify_msdp = true; |
200 | } | |
201 | ||
d62a17ae | 202 | pim_mroute_del(up->channel_oil, __PRETTY_FUNCTION__); |
203 | upstream_channel_oil_detach(up); | |
204 | ||
7692c5ae DS |
205 | for (ALL_LIST_ELEMENTS(up->ifchannels, node, nnode, ch)) |
206 | pim_ifchannel_delete(ch); | |
affe9e99 | 207 | list_delete_and_null(&up->ifchannels); |
d62a17ae | 208 | |
7692c5ae DS |
209 | pim_upstream_remove_children(pim, up); |
210 | if (up->sources) | |
211 | list_delete_and_null(&up->sources); | |
212 | ||
d62a17ae | 213 | if (up->parent && up->parent->sources) |
214 | listnode_delete(up->parent->sources, up); | |
215 | up->parent = NULL; | |
216 | ||
9b29ea95 DS |
217 | listnode_delete(pim->upstream_list, up); |
218 | hash_release(pim->upstream_hash, up); | |
d62a17ae | 219 | |
220 | if (notify_msdp) { | |
472ad383 | 221 | pim_msdp_up_del(pim, &up->sg); |
d62a17ae | 222 | } |
223 | ||
224 | /* Deregister addr with Zebra NHT */ | |
225 | nht_p.family = AF_INET; | |
226 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
227 | nht_p.u.prefix4 = up->upstream_addr; | |
228 | if (PIM_DEBUG_TRACE) { | |
229 | char buf[PREFIX2STR_BUFFER]; | |
230 | prefix2str(&nht_p, buf, sizeof(buf)); | |
231 | zlog_debug("%s: Deregister upstream %s addr %s with Zebra NHT", | |
232 | __PRETTY_FUNCTION__, up->sg_str, buf); | |
233 | } | |
9b29ea95 | 234 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL); |
d62a17ae | 235 | |
172e45dc | 236 | XFREE(MTYPE_PIM_UPSTREAM, up); |
d62a17ae | 237 | |
238 | return NULL; | |
12e41d03 DL |
239 | } |
240 | ||
d62a17ae | 241 | void pim_upstream_send_join(struct pim_upstream *up) |
12e41d03 | 242 | { |
d62a17ae | 243 | if (PIM_DEBUG_TRACE) { |
244 | char rpf_str[PREFIX_STRLEN]; | |
245 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, | |
246 | sizeof(rpf_str)); | |
247 | zlog_debug("%s: RPF'%s=%s(%s) for Interface %s", | |
248 | __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
249 | pim_upstream_state2str(up->join_state), | |
250 | up->rpf.source_nexthop.interface->name); | |
251 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
252 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", | |
253 | __PRETTY_FUNCTION__, up->sg_str, rpf_str); | |
254 | /* warning only */ | |
255 | } | |
256 | } | |
257 | ||
258 | /* send Join(S,G) to the current upstream neighbor */ | |
259 | pim_jp_agg_single_upstream_send(&up->rpf, up, 1 /* join */); | |
12e41d03 DL |
260 | } |
261 | ||
262 | static int on_join_timer(struct thread *t) | |
263 | { | |
d62a17ae | 264 | struct pim_upstream *up; |
12e41d03 | 265 | |
d62a17ae | 266 | up = THREAD_ARG(t); |
12e41d03 | 267 | |
d62a17ae | 268 | /* |
269 | * In the case of a HFR we will not ahve anyone to send this to. | |
270 | */ | |
271 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) | |
272 | return 0; | |
bb6e291f | 273 | |
d62a17ae | 274 | /* |
275 | * Don't send the join if the outgoing interface is a loopback | |
276 | * But since this might change leave the join timer running | |
277 | */ | |
278 | if (up->rpf.source_nexthop | |
279 | .interface && !if_is_loopback(up->rpf.source_nexthop.interface)) | |
280 | pim_upstream_send_join(up); | |
12e41d03 | 281 | |
d62a17ae | 282 | join_timer_start(up); |
12e41d03 | 283 | |
d62a17ae | 284 | return 0; |
12e41d03 DL |
285 | } |
286 | ||
982bff89 | 287 | static void join_timer_stop(struct pim_upstream *up) |
12e41d03 | 288 | { |
d62a17ae | 289 | struct pim_neighbor *nbr; |
982bff89 | 290 | |
d62a17ae | 291 | THREAD_OFF(up->t_join_timer); |
7eb90689 | 292 | |
d62a17ae | 293 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, |
294 | up->rpf.rpf_addr.u.prefix4); | |
982bff89 | 295 | |
d62a17ae | 296 | if (nbr) |
297 | pim_jp_agg_remove_group(nbr->upstream_jp_agg, up); | |
982bff89 | 298 | |
d62a17ae | 299 | pim_jp_agg_upstream_verification(up, false); |
982bff89 DS |
300 | } |
301 | ||
d62a17ae | 302 | void join_timer_start(struct pim_upstream *up) |
982bff89 | 303 | { |
d62a17ae | 304 | struct pim_neighbor *nbr = NULL; |
305 | ||
306 | if (up->rpf.source_nexthop.interface) { | |
307 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, | |
308 | up->rpf.rpf_addr.u.prefix4); | |
309 | ||
310 | if (PIM_DEBUG_PIM_EVENTS) { | |
311 | zlog_debug( | |
312 | "%s: starting %d sec timer for upstream (S,G)=%s", | |
313 | __PRETTY_FUNCTION__, qpim_t_periodic, | |
314 | up->sg_str); | |
315 | } | |
316 | } | |
317 | ||
318 | if (nbr) | |
319 | pim_jp_agg_add_group(nbr->upstream_jp_agg, up, 1); | |
320 | else { | |
321 | THREAD_OFF(up->t_join_timer); | |
322 | thread_add_timer(master, on_join_timer, up, qpim_t_periodic, | |
323 | &up->t_join_timer); | |
324 | } | |
325 | pim_jp_agg_upstream_verification(up, true); | |
12e41d03 DL |
326 | } |
327 | ||
982bff89 DS |
328 | /* |
329 | * This is only called when we are switching the upstream | |
330 | * J/P from one neighbor to another | |
331 | * | |
332 | * As such we need to remove from the old list and | |
333 | * add to the new list. | |
334 | */ | |
d62a17ae | 335 | void pim_upstream_join_timer_restart(struct pim_upstream *up, |
336 | struct pim_rpf *old) | |
12e41d03 | 337 | { |
d62a17ae | 338 | // THREAD_OFF(up->t_join_timer); |
339 | join_timer_start(up); | |
12e41d03 DL |
340 | } |
341 | ||
342 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
343 | int interval_msec) | |
344 | { | |
d62a17ae | 345 | if (PIM_DEBUG_PIM_EVENTS) { |
346 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", | |
347 | __PRETTY_FUNCTION__, interval_msec, up->sg_str); | |
348 | } | |
349 | ||
350 | THREAD_OFF(up->t_join_timer); | |
351 | thread_add_timer_msec(master, on_join_timer, up, interval_msec, | |
352 | &up->t_join_timer); | |
12e41d03 DL |
353 | } |
354 | ||
355 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
d62a17ae | 356 | struct in_addr rpf_addr, int holdtime) |
12e41d03 | 357 | { |
d62a17ae | 358 | long t_joinsuppress_msec; |
359 | long join_timer_remain_msec; | |
360 | ||
361 | t_joinsuppress_msec = | |
362 | MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
363 | 1000 * holdtime); | |
364 | ||
365 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
366 | ||
367 | if (PIM_DEBUG_TRACE) { | |
368 | char rpf_str[INET_ADDRSTRLEN]; | |
369 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); | |
370 | zlog_debug( | |
371 | "%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", | |
372 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
373 | join_timer_remain_msec, t_joinsuppress_msec); | |
374 | } | |
375 | ||
376 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
377 | if (PIM_DEBUG_TRACE) { | |
378 | zlog_debug( | |
379 | "%s %s: suppressing Join(S,G)=%s for %ld msec", | |
380 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, | |
381 | t_joinsuppress_msec); | |
382 | } | |
383 | ||
384 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
385 | } | |
12e41d03 DL |
386 | } |
387 | ||
388 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
d62a17ae | 389 | struct pim_upstream *up) |
12e41d03 | 390 | { |
d62a17ae | 391 | long join_timer_remain_msec; |
392 | int t_override_msec; | |
393 | ||
394 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
395 | t_override_msec = | |
396 | pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
397 | ||
398 | if (PIM_DEBUG_TRACE) { | |
399 | char rpf_str[INET_ADDRSTRLEN]; | |
400 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr.u.prefix4, rpf_str, | |
401 | sizeof(rpf_str)); | |
402 | zlog_debug( | |
403 | "%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", | |
404 | debug_label, up->sg_str, rpf_str, | |
405 | join_timer_remain_msec, t_override_msec); | |
406 | } | |
407 | ||
408 | if (join_timer_remain_msec > t_override_msec) { | |
409 | if (PIM_DEBUG_TRACE) { | |
410 | zlog_debug( | |
411 | "%s: decreasing (S,G)=%s join timer to t_override=%d msec", | |
412 | debug_label, up->sg_str, t_override_msec); | |
413 | } | |
414 | ||
415 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
416 | } | |
12e41d03 DL |
417 | } |
418 | ||
419 | static void forward_on(struct pim_upstream *up) | |
420 | { | |
d62a17ae | 421 | struct listnode *chnode; |
422 | struct listnode *chnextnode; | |
423 | struct pim_ifchannel *ch = NULL; | |
12e41d03 | 424 | |
d62a17ae | 425 | /* scan (S,G) state */ |
426 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
427 | if (pim_macro_chisin_oiflist(ch)) | |
428 | pim_forward_start(ch); | |
12e41d03 | 429 | |
d62a17ae | 430 | } /* scan iface channel list */ |
12e41d03 DL |
431 | } |
432 | ||
433 | static void forward_off(struct pim_upstream *up) | |
434 | { | |
d62a17ae | 435 | struct listnode *chnode; |
436 | struct listnode *chnextnode; | |
437 | struct pim_ifchannel *ch; | |
12e41d03 | 438 | |
d62a17ae | 439 | /* scan per-interface (S,G) state */ |
440 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
12e41d03 | 441 | |
aabb9a2f | 442 | pim_forward_stop(ch, false); |
12e41d03 | 443 | |
d62a17ae | 444 | } /* scan iface channel list */ |
12e41d03 DL |
445 | } |
446 | ||
d62a17ae | 447 | static int pim_upstream_could_register(struct pim_upstream *up) |
bb6e291f | 448 | { |
d62a17ae | 449 | struct pim_interface *pim_ifp = NULL; |
450 | ||
451 | if (up->rpf.source_nexthop.interface) | |
452 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
453 | else { | |
454 | if (PIM_DEBUG_TRACE) | |
455 | zlog_debug("%s: up %s RPF is not present", | |
456 | __PRETTY_FUNCTION__, up->sg_str); | |
457 | } | |
bb6e291f | 458 | |
d62a17ae | 459 | if (pim_ifp && PIM_I_am_DR(pim_ifp) |
460 | && pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
461 | up->sg.src)) | |
462 | return 1; | |
bb6e291f | 463 | |
d62a17ae | 464 | return 0; |
bb6e291f DS |
465 | } |
466 | ||
15a5dafe | 467 | /* Source registration is supressed for SSM groups. When the SSM range changes |
468 | * we re-revaluate register setup for existing upstream entries */ | |
9b29ea95 | 469 | void pim_upstream_register_reevaluate(struct pim_instance *pim) |
15a5dafe | 470 | { |
d62a17ae | 471 | struct listnode *upnode; |
472 | struct pim_upstream *up; | |
473 | ||
9b29ea95 | 474 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
d62a17ae | 475 | /* If FHR is set CouldRegister is True. Also check if the flow |
476 | * is actually active; if it is not kat setup will trigger | |
477 | * source | |
478 | * registration whenever the flow becomes active. */ | |
479 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) || !up->t_ka_timer) | |
480 | continue; | |
481 | ||
6f439a70 | 482 | if (pim_is_grp_ssm(pim, up->sg.grp)) { |
d62a17ae | 483 | /* clear the register state for SSM groups */ |
484 | if (up->reg_state != PIM_REG_NOINFO) { | |
485 | if (PIM_DEBUG_PIM_EVENTS) | |
486 | zlog_debug( | |
487 | "Clear register for %s as G is now SSM", | |
488 | up->sg_str); | |
489 | /* remove regiface from the OIL if it is there*/ | |
490 | pim_channel_del_oif(up->channel_oil, | |
9b29ea95 | 491 | pim->regiface, |
d62a17ae | 492 | PIM_OIF_FLAG_PROTO_PIM); |
493 | up->reg_state = PIM_REG_NOINFO; | |
494 | } | |
495 | } else { | |
496 | /* register ASM sources with the RP */ | |
497 | if (up->reg_state == PIM_REG_NOINFO) { | |
498 | if (PIM_DEBUG_PIM_EVENTS) | |
499 | zlog_debug( | |
500 | "Register %s as G is now ASM", | |
501 | up->sg_str); | |
502 | pim_channel_add_oif(up->channel_oil, | |
9b29ea95 | 503 | pim->regiface, |
d62a17ae | 504 | PIM_OIF_FLAG_PROTO_PIM); |
505 | up->reg_state = PIM_REG_JOIN; | |
506 | } | |
507 | } | |
508 | } | |
15a5dafe | 509 | } |
510 | ||
1eca8576 | 511 | void pim_upstream_switch(struct pim_instance *pim, struct pim_upstream *up, |
d62a17ae | 512 | enum pim_upstream_state new_state) |
12e41d03 | 513 | { |
d62a17ae | 514 | enum pim_upstream_state old_state = up->join_state; |
515 | ||
516 | if (PIM_DEBUG_PIM_EVENTS) { | |
517 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", | |
518 | __PRETTY_FUNCTION__, up->sg_str, | |
519 | pim_upstream_state2str(up->join_state), | |
520 | pim_upstream_state2str(new_state)); | |
521 | } | |
522 | ||
523 | up->join_state = new_state; | |
524 | if (old_state != new_state) | |
525 | up->state_transition = pim_time_monotonic_sec(); | |
526 | ||
527 | pim_upstream_update_assert_tracking_desired(up); | |
528 | ||
529 | if (new_state == PIM_UPSTREAM_JOINED) { | |
530 | if (old_state != PIM_UPSTREAM_JOINED) { | |
531 | int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags); | |
532 | forward_on(up); | |
1eca8576 | 533 | pim_msdp_up_join_state_changed(pim, up); |
d62a17ae | 534 | if (pim_upstream_could_register(up)) { |
535 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
536 | if (!old_fhr | |
537 | && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM( | |
538 | up->flags)) { | |
539 | pim_upstream_keep_alive_timer_start( | |
19b807ca | 540 | up, pim->keep_alive_time); |
d62a17ae | 541 | pim_register_join(up); |
542 | } | |
543 | } else { | |
544 | pim_upstream_send_join(up); | |
545 | join_timer_start(up); | |
546 | } | |
547 | } else { | |
548 | forward_on(up); | |
549 | } | |
550 | } else { | |
551 | ||
552 | forward_off(up); | |
553 | if (old_state == PIM_UPSTREAM_JOINED) | |
1eca8576 | 554 | pim_msdp_up_join_state_changed(pim, up); |
d62a17ae | 555 | |
556 | /* IHR, Trigger SGRpt on *,G IIF to prune S,G from RPT towards | |
557 | RP. | |
558 | If I am RP for G then send S,G prune to its IIF. */ | |
559 | if (pim_upstream_is_sg_rpt(up) && up->parent | |
1eca8576 | 560 | && !I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 561 | if (PIM_DEBUG_PIM_TRACE_DETAIL) |
562 | zlog_debug( | |
563 | "%s: *,G IIF %s S,G IIF %s ", | |
564 | __PRETTY_FUNCTION__, | |
565 | up->parent->rpf.source_nexthop | |
566 | .interface->name, | |
567 | up->rpf.source_nexthop.interface->name); | |
568 | pim_jp_agg_single_upstream_send(&up->parent->rpf, | |
569 | up->parent, | |
570 | 1 /* (W,G) Join */); | |
571 | } else | |
572 | pim_jp_agg_single_upstream_send(&up->rpf, up, | |
573 | 0 /* prune */); | |
574 | join_timer_stop(up); | |
575 | } | |
12e41d03 DL |
576 | } |
577 | ||
d62a17ae | 578 | int pim_upstream_compare(void *arg1, void *arg2) |
03417ccd | 579 | { |
d62a17ae | 580 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
581 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
03417ccd | 582 | |
d62a17ae | 583 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) |
584 | return -1; | |
03417ccd | 585 | |
d62a17ae | 586 | if (ntohl(up1->sg.grp.s_addr) > ntohl(up2->sg.grp.s_addr)) |
587 | return 1; | |
03417ccd | 588 | |
d62a17ae | 589 | if (ntohl(up1->sg.src.s_addr) < ntohl(up2->sg.src.s_addr)) |
590 | return -1; | |
03417ccd | 591 | |
d62a17ae | 592 | if (ntohl(up1->sg.src.s_addr) > ntohl(up2->sg.src.s_addr)) |
593 | return 1; | |
03417ccd | 594 | |
d62a17ae | 595 | return 0; |
03417ccd DS |
596 | } |
597 | ||
2002dcdb DS |
598 | static struct pim_upstream *pim_upstream_new(struct pim_instance *pim, |
599 | struct prefix_sg *sg, | |
600 | struct interface *incoming, | |
0885a9f1 DS |
601 | int flags, |
602 | struct pim_ifchannel *ch) | |
12e41d03 | 603 | { |
d62a17ae | 604 | enum pim_rpf_result rpf_result; |
605 | struct pim_interface *pim_ifp; | |
606 | struct pim_upstream *up; | |
607 | ||
608 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); | |
d62a17ae | 609 | |
610 | up->sg = *sg; | |
611 | pim_str_sg_set(sg, up->sg_str); | |
0885a9f1 DS |
612 | if (ch) |
613 | ch->upstream = up; | |
614 | ||
9b29ea95 | 615 | up = hash_get(pim->upstream_hash, up, hash_alloc_intern); |
d9c9a9ee DS |
616 | if (!pim_rp_set_upstream_addr(pim, &up->upstream_addr, sg->src, |
617 | sg->grp)) { | |
d62a17ae | 618 | if (PIM_DEBUG_TRACE) |
619 | zlog_debug("%s: Received a (*,G) with no RP configured", | |
620 | __PRETTY_FUNCTION__); | |
621 | ||
9b29ea95 | 622 | hash_release(pim->upstream_hash, up); |
d62a17ae | 623 | XFREE(MTYPE_PIM_UPSTREAM, up); |
624 | return NULL; | |
625 | } | |
626 | ||
9b29ea95 | 627 | up->parent = pim_upstream_find_parent(pim, up); |
d62a17ae | 628 | if (up->sg.src.s_addr == INADDR_ANY) { |
629 | up->sources = list_new(); | |
630 | up->sources->cmp = pim_upstream_compare; | |
631 | } else | |
632 | up->sources = NULL; | |
633 | ||
9b29ea95 | 634 | pim_upstream_find_new_children(pim, up); |
d62a17ae | 635 | up->flags = flags; |
636 | up->ref_count = 1; | |
637 | up->t_join_timer = NULL; | |
638 | up->t_ka_timer = NULL; | |
639 | up->t_rs_timer = NULL; | |
640 | up->t_msdp_reg_timer = NULL; | |
641 | up->join_state = PIM_UPSTREAM_NOTJOINED; | |
642 | up->reg_state = PIM_REG_NOINFO; | |
643 | up->state_transition = pim_time_monotonic_sec(); | |
644 | up->channel_oil = NULL; | |
645 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; | |
646 | ||
647 | up->rpf.source_nexthop.interface = NULL; | |
648 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; | |
649 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = | |
650 | PIM_NET_INADDR_ANY; | |
651 | up->rpf.source_nexthop.mrib_metric_preference = | |
652 | qpim_infinite_assert_metric.metric_preference; | |
653 | up->rpf.source_nexthop.mrib_route_metric = | |
654 | qpim_infinite_assert_metric.route_metric; | |
655 | up->rpf.rpf_addr.family = AF_INET; | |
656 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
657 | ||
658 | up->ifchannels = list_new(); | |
659 | up->ifchannels->cmp = (int (*)(void *, void *))pim_ifchannel_compare; | |
660 | ||
661 | if (up->sg.src.s_addr != INADDR_ANY) | |
9b29ea95 | 662 | wheel_add_item(pim->upstream_sg_wheel, up); |
d62a17ae | 663 | |
2002dcdb | 664 | rpf_result = pim_rpf_update(pim, up, NULL, 1); |
d62a17ae | 665 | if (rpf_result == PIM_RPF_FAILURE) { |
666 | struct prefix nht_p; | |
667 | ||
668 | if (PIM_DEBUG_TRACE) | |
669 | zlog_debug( | |
670 | "%s: Attempting to create upstream(%s), Unable to RPF for source", | |
671 | __PRETTY_FUNCTION__, up->sg_str); | |
672 | ||
673 | nht_p.family = AF_INET; | |
674 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
675 | nht_p.u.prefix4 = up->upstream_addr; | |
2002dcdb | 676 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL); |
d62a17ae | 677 | |
678 | if (up->parent) { | |
679 | listnode_delete(up->parent->sources, up); | |
680 | up->parent = NULL; | |
681 | } | |
682 | ||
683 | if (up->sg.src.s_addr != INADDR_ANY) | |
9b29ea95 | 684 | wheel_remove_item(pim->upstream_sg_wheel, up); |
d62a17ae | 685 | |
9b29ea95 | 686 | pim_upstream_remove_children(pim, up); |
d62a17ae | 687 | if (up->sources) |
affe9e99 | 688 | list_delete_and_null(&up->sources); |
d62a17ae | 689 | |
affe9e99 | 690 | list_delete_and_null(&up->ifchannels); |
a5d4c69d | 691 | |
9b29ea95 | 692 | hash_release(pim->upstream_hash, up); |
d62a17ae | 693 | XFREE(MTYPE_PIM_UPSTREAM, up); |
694 | return NULL; | |
695 | } | |
696 | ||
697 | if (up->rpf.source_nexthop.interface) { | |
698 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
699 | if (pim_ifp) | |
700 | up->channel_oil = pim_channel_oil_add( | |
611925dc | 701 | pim, &up->sg, pim_ifp->mroute_vif_index); |
d62a17ae | 702 | } |
9b29ea95 | 703 | listnode_add_sort(pim->upstream_list, up); |
d62a17ae | 704 | |
705 | if (PIM_DEBUG_TRACE) { | |
706 | zlog_debug( | |
707 | "%s: Created Upstream %s upstream_addr %s ref count %d increment", | |
708 | __PRETTY_FUNCTION__, up->sg_str, | |
709 | inet_ntoa(up->upstream_addr), up->ref_count); | |
710 | } | |
711 | ||
712 | return up; | |
12e41d03 DL |
713 | } |
714 | ||
9b29ea95 DS |
715 | struct pim_upstream *pim_upstream_find(struct pim_instance *pim, |
716 | struct prefix_sg *sg) | |
12e41d03 | 717 | { |
d62a17ae | 718 | struct pim_upstream lookup; |
719 | struct pim_upstream *up = NULL; | |
12e41d03 | 720 | |
d62a17ae | 721 | lookup.sg = *sg; |
9b29ea95 | 722 | up = hash_lookup(pim->upstream_hash, &lookup); |
d62a17ae | 723 | return up; |
12e41d03 DL |
724 | } |
725 | ||
d62a17ae | 726 | struct pim_upstream *pim_upstream_find_or_add(struct prefix_sg *sg, |
727 | struct interface *incoming, | |
728 | int flags, const char *name) | |
e711cd3c | 729 | { |
d62a17ae | 730 | struct pim_upstream *up; |
9b29ea95 DS |
731 | struct pim_interface *pim_ifp; |
732 | ||
733 | pim_ifp = incoming->info; | |
d62a17ae | 734 | |
9b29ea95 | 735 | up = pim_upstream_find(pim_ifp->pim, sg); |
d62a17ae | 736 | |
737 | if (up) { | |
738 | if (!(up->flags & flags)) { | |
739 | up->flags |= flags; | |
740 | up->ref_count++; | |
741 | if (PIM_DEBUG_TRACE) | |
742 | zlog_debug( | |
743 | "%s(%s): upstream %s ref count %d increment", | |
744 | __PRETTY_FUNCTION__, name, up->sg_str, | |
745 | up->ref_count); | |
746 | } | |
747 | } else | |
0885a9f1 DS |
748 | up = pim_upstream_add(pim_ifp->pim, sg, incoming, flags, name, |
749 | NULL); | |
d62a17ae | 750 | |
751 | return up; | |
e711cd3c DS |
752 | } |
753 | ||
d62a17ae | 754 | void pim_upstream_ref(struct pim_upstream *up, int flags, const char *name) |
1bf16443 | 755 | { |
d62a17ae | 756 | up->flags |= flags; |
757 | ++up->ref_count; | |
758 | if (PIM_DEBUG_TRACE) | |
759 | zlog_debug("%s(%s): upstream %s ref count %d increment", | |
760 | __PRETTY_FUNCTION__, name, up->sg_str, | |
761 | up->ref_count); | |
1bf16443 | 762 | } |
763 | ||
2002dcdb DS |
764 | struct pim_upstream *pim_upstream_add(struct pim_instance *pim, |
765 | struct prefix_sg *sg, | |
d62a17ae | 766 | struct interface *incoming, int flags, |
0885a9f1 DS |
767 | const char *name, |
768 | struct pim_ifchannel *ch) | |
12e41d03 | 769 | { |
d62a17ae | 770 | struct pim_upstream *up = NULL; |
771 | int found = 0; | |
9b29ea95 | 772 | |
2002dcdb | 773 | up = pim_upstream_find(pim, sg); |
d62a17ae | 774 | if (up) { |
775 | pim_upstream_ref(up, flags, name); | |
776 | found = 1; | |
777 | } else { | |
0885a9f1 | 778 | up = pim_upstream_new(pim, sg, incoming, flags, ch); |
d62a17ae | 779 | } |
780 | ||
781 | if (PIM_DEBUG_TRACE) { | |
782 | if (up) { | |
783 | char buf[PREFIX2STR_BUFFER]; | |
784 | prefix2str(&up->rpf.rpf_addr, buf, sizeof(buf)); | |
785 | zlog_debug("%s(%s): %s, iif %s (%s) found: %d: ref_count: %d", | |
f4075cb4 | 786 | __PRETTY_FUNCTION__, name, |
55785900 CS |
787 | up->sg_str, buf, up->rpf.source_nexthop.interface ? |
788 | up->rpf.source_nexthop.interface->name : "NIL" , | |
789 | found, up->ref_count); | |
d62a17ae | 790 | } else |
791 | zlog_debug("%s(%s): (%s) failure to create", | |
792 | __PRETTY_FUNCTION__, name, | |
793 | pim_str_sg_dump(sg)); | |
794 | } | |
12e41d03 | 795 | |
d62a17ae | 796 | return up; |
12e41d03 DL |
797 | } |
798 | ||
c8fc07cb DS |
799 | /* |
800 | * Passed in up must be the upstream for ch. starch is NULL if no | |
801 | * information | |
802 | */ | |
d62a17ae | 803 | int pim_upstream_evaluate_join_desired_interface(struct pim_upstream *up, |
804 | struct pim_ifchannel *ch, | |
805 | struct pim_ifchannel *starch) | |
7a3ddda5 | 806 | { |
d62a17ae | 807 | if (ch) { |
808 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
809 | return 0; | |
810 | ||
811 | if (!pim_macro_ch_lost_assert(ch) | |
812 | && pim_macro_chisin_joins_or_include(ch)) | |
813 | return 1; | |
814 | } | |
815 | ||
816 | /* | |
817 | * joins (*,G) | |
818 | */ | |
819 | if (starch) { | |
820 | if (PIM_IF_FLAG_TEST_S_G_RPT(starch->upstream->flags)) | |
821 | return 0; | |
822 | ||
823 | if (!pim_macro_ch_lost_assert(starch) | |
824 | && pim_macro_chisin_joins_or_include(starch)) | |
825 | return 1; | |
826 | } | |
827 | ||
828 | return 0; | |
7a3ddda5 DS |
829 | } |
830 | ||
12e41d03 DL |
831 | /* |
832 | Evaluate JoinDesired(S,G): | |
833 | ||
834 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
835 | in the set: | |
836 | ||
837 | inherited_olist(S,G) = | |
838 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
839 | ||
840 | JoinDesired(S,G) may be affected by changes in the following: | |
841 | ||
842 | pim_ifp->primary_address | |
843 | pim_ifp->pim_dr_addr | |
844 | ch->ifassert_winner_metric | |
845 | ch->ifassert_winner | |
d62a17ae | 846 | ch->local_ifmembership |
12e41d03 DL |
847 | ch->ifjoin_state |
848 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
849 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
850 | ch->upstream->rpf.source_nexthop.interface | |
851 | ||
852 | See also pim_upstream_update_join_desired() below. | |
853 | */ | |
9b29ea95 DS |
854 | int pim_upstream_evaluate_join_desired(struct pim_instance *pim, |
855 | struct pim_upstream *up) | |
12e41d03 | 856 | { |
d62a17ae | 857 | struct interface *ifp; |
d62a17ae | 858 | struct pim_ifchannel *ch, *starch; |
859 | struct pim_upstream *starup = up->parent; | |
860 | int ret = 0; | |
12e41d03 | 861 | |
451fda4f | 862 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
d62a17ae | 863 | if (!ifp->info) |
864 | continue; | |
c8fc07cb | 865 | |
d62a17ae | 866 | ch = pim_ifchannel_find(ifp, &up->sg); |
c8fc07cb | 867 | |
d62a17ae | 868 | if (starup) |
869 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
870 | else | |
871 | starch = NULL; | |
c8fc07cb | 872 | |
d62a17ae | 873 | if (!ch && !starch) |
874 | continue; | |
12e41d03 | 875 | |
d62a17ae | 876 | ret += pim_upstream_evaluate_join_desired_interface(up, ch, |
877 | starch); | |
878 | } /* scan iface channel list */ | |
12e41d03 | 879 | |
d62a17ae | 880 | return ret; /* false */ |
12e41d03 DL |
881 | } |
882 | ||
883 | /* | |
884 | See also pim_upstream_evaluate_join_desired() above. | |
885 | */ | |
9b29ea95 DS |
886 | void pim_upstream_update_join_desired(struct pim_instance *pim, |
887 | struct pim_upstream *up) | |
12e41d03 | 888 | { |
d62a17ae | 889 | int was_join_desired; /* boolean */ |
890 | int is_join_desired; /* boolean */ | |
891 | ||
892 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
893 | ||
9b29ea95 | 894 | is_join_desired = pim_upstream_evaluate_join_desired(pim, up); |
d62a17ae | 895 | if (is_join_desired) |
896 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
897 | else | |
898 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
899 | ||
900 | /* switched from false to true */ | |
901 | if (is_join_desired && !was_join_desired) { | |
1eca8576 | 902 | pim_upstream_switch(pim, up, PIM_UPSTREAM_JOINED); |
d62a17ae | 903 | return; |
904 | } | |
905 | ||
906 | /* switched from true to false */ | |
907 | if (!is_join_desired && was_join_desired) { | |
1eca8576 | 908 | pim_upstream_switch(pim, up, PIM_UPSTREAM_NOTJOINED); |
d62a17ae | 909 | return; |
910 | } | |
12e41d03 DL |
911 | } |
912 | ||
913 | /* | |
914 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
915 | Transitions from Joined State | |
916 | RPF'(S,G) GenID changes | |
917 | ||
918 | The upstream (S,G) state machine remains in Joined state. If the | |
919 | Join Timer is set to expire in more than t_override seconds, reset | |
920 | it so that it expires after t_override seconds. | |
921 | */ | |
9b29ea95 DS |
922 | void pim_upstream_rpf_genid_changed(struct pim_instance *pim, |
923 | struct in_addr neigh_addr) | |
12e41d03 | 924 | { |
d62a17ae | 925 | struct listnode *up_node; |
926 | struct listnode *up_nextnode; | |
927 | struct pim_upstream *up; | |
928 | ||
929 | /* | |
930 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
931 | */ | |
9b29ea95 | 932 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { |
d62a17ae | 933 | |
934 | if (PIM_DEBUG_TRACE) { | |
935 | char neigh_str[INET_ADDRSTRLEN]; | |
936 | char rpf_addr_str[PREFIX_STRLEN]; | |
937 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, | |
938 | sizeof(neigh_str)); | |
939 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, | |
940 | sizeof(rpf_addr_str)); | |
941 | zlog_debug( | |
8dbdb215 | 942 | "%s: matching neigh=%s against upstream (S,G)=%s[%s] joined=%d rpf_addr=%s", |
996c9314 LB |
943 | __PRETTY_FUNCTION__, neigh_str, up->sg_str, |
944 | pim->vrf->name, | |
d62a17ae | 945 | up->join_state == PIM_UPSTREAM_JOINED, |
946 | rpf_addr_str); | |
947 | } | |
948 | ||
949 | /* consider only (S,G) upstream in Joined state */ | |
950 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
951 | continue; | |
952 | ||
953 | /* match RPF'(S,G)=neigh_addr */ | |
954 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) | |
955 | continue; | |
956 | ||
957 | pim_upstream_join_timer_decrease_to_t_override( | |
958 | "RPF'(S,G) GenID change", up); | |
959 | } | |
12e41d03 DL |
960 | } |
961 | ||
962 | ||
963 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
964 | struct interface *old_rpf_ifp) | |
965 | { | |
d62a17ae | 966 | struct listnode *chnode; |
967 | struct listnode *chnextnode; | |
968 | struct pim_ifchannel *ch; | |
969 | ||
970 | /* search all ifchannels */ | |
971 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
972 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
973 | if ( | |
974 | /* RPF_interface(S) was NOT I */ | |
975 | (old_rpf_ifp == ch->interface) && | |
976 | /* RPF_interface(S) stopped being I */ | |
977 | (ch->upstream->rpf.source_nexthop | |
978 | .interface != ch->interface)) { | |
979 | assert_action_a5(ch); | |
980 | } | |
981 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
982 | ||
983 | pim_ifchannel_update_assert_tracking_desired(ch); | |
984 | } | |
12e41d03 DL |
985 | } |
986 | ||
987 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
988 | { | |
d62a17ae | 989 | struct listnode *chnode; |
990 | struct listnode *chnextnode; | |
991 | struct pim_ifchannel *ch; | |
992 | ||
993 | /* scan per-interface (S,G) state */ | |
994 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
995 | pim_ifchannel_update_could_assert(ch); | |
996 | } /* scan iface channel list */ | |
12e41d03 DL |
997 | } |
998 | ||
999 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
1000 | { | |
d62a17ae | 1001 | struct listnode *chnode; |
1002 | struct listnode *chnextnode; | |
1003 | struct pim_ifchannel *ch; | |
12e41d03 | 1004 | |
d62a17ae | 1005 | /* scan per-interface (S,G) state */ |
1006 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1007 | pim_ifchannel_update_my_assert_metric(ch); | |
12e41d03 | 1008 | |
d62a17ae | 1009 | } /* scan iface channel list */ |
12e41d03 DL |
1010 | } |
1011 | ||
1012 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
1013 | { | |
d62a17ae | 1014 | struct listnode *chnode; |
1015 | struct listnode *chnextnode; | |
1016 | struct pim_interface *pim_ifp; | |
1017 | struct pim_ifchannel *ch; | |
1018 | ||
1019 | /* scan per-interface (S,G) state */ | |
1020 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1021 | if (!ch->interface) | |
1022 | continue; | |
1023 | pim_ifp = ch->interface->info; | |
1024 | if (!pim_ifp) | |
1025 | continue; | |
1026 | ||
1027 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1028 | ||
1029 | } /* scan iface channel list */ | |
12e41d03 | 1030 | } |
f14248dd | 1031 | |
1bf16443 | 1032 | /* When kat is stopped CouldRegister goes to false so we need to |
1033 | * transition the (S, G) on FHR to NI state and remove reg tunnel | |
1034 | * from the OIL */ | |
9b29ea95 DS |
1035 | static void pim_upstream_fhr_kat_expiry(struct pim_instance *pim, |
1036 | struct pim_upstream *up) | |
1bf16443 | 1037 | { |
d62a17ae | 1038 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
1039 | return; | |
1040 | ||
1041 | if (PIM_DEBUG_TRACE) | |
1042 | zlog_debug("kat expired on %s; clear fhr reg state", | |
1043 | up->sg_str); | |
1044 | ||
1045 | /* stop reg-stop timer */ | |
1046 | THREAD_OFF(up->t_rs_timer); | |
1047 | /* remove regiface from the OIL if it is there*/ | |
9b29ea95 | 1048 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1049 | PIM_OIF_FLAG_PROTO_PIM); |
1050 | /* clear the register state */ | |
1051 | up->reg_state = PIM_REG_NOINFO; | |
1052 | PIM_UPSTREAM_FLAG_UNSET_FHR(up->flags); | |
1bf16443 | 1053 | } |
1054 | ||
1055 | /* When kat is started CouldRegister can go to true. And if it does we | |
1056 | * need to transition the (S, G) on FHR to JOINED state and add reg tunnel | |
1057 | * to the OIL */ | |
1058 | static void pim_upstream_fhr_kat_start(struct pim_upstream *up) | |
1059 | { | |
d62a17ae | 1060 | if (pim_upstream_could_register(up)) { |
1061 | if (PIM_DEBUG_TRACE) | |
1062 | zlog_debug( | |
1063 | "kat started on %s; set fhr reg state to joined", | |
1064 | up->sg_str); | |
1065 | ||
1066 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
1067 | if (up->reg_state == PIM_REG_NOINFO) | |
1068 | pim_register_join(up); | |
1069 | } | |
1bf16443 | 1070 | } |
1071 | ||
f14248dd DS |
1072 | /* |
1073 | * On an RP, the PMBR value must be cleared when the | |
1074 | * Keepalive Timer expires | |
1bf16443 | 1075 | * KAT expiry indicates that flow is inactive. If the flow was created or |
1076 | * maintained by activity now is the time to deref it. | |
f14248dd | 1077 | */ |
d62a17ae | 1078 | static int pim_upstream_keep_alive_timer(struct thread *t) |
f14248dd | 1079 | { |
d62a17ae | 1080 | struct pim_upstream *up; |
8e5f97e3 | 1081 | struct pim_instance *pim; |
d62a17ae | 1082 | |
1083 | up = THREAD_ARG(t); | |
8e5f97e3 | 1084 | pim = up->channel_oil->pim; |
d62a17ae | 1085 | |
8e5f97e3 | 1086 | if (I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 1087 | pim_br_clear_pmbr(&up->sg); |
1088 | /* | |
1089 | * We need to do more here :) | |
1090 | * But this is the start. | |
1091 | */ | |
1092 | } | |
1093 | ||
1094 | /* source is no longer active - pull the SA from MSDP's cache */ | |
472ad383 | 1095 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 1096 | |
1097 | /* if entry was created because of activity we need to deref it */ | |
1098 | if (PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
8e5f97e3 | 1099 | pim_upstream_fhr_kat_expiry(pim, up); |
d62a17ae | 1100 | if (PIM_DEBUG_TRACE) |
996c9314 LB |
1101 | zlog_debug( |
1102 | "kat expired on %s[%s]; remove stream reference", | |
1103 | up->sg_str, pim->vrf->name); | |
d62a17ae | 1104 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(up->flags); |
8e5f97e3 | 1105 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
d62a17ae | 1106 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) { |
8022df6a DS |
1107 | struct pim_upstream *parent = up->parent; |
1108 | ||
d62a17ae | 1109 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(up->flags); |
8e5f97e3 | 1110 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
8022df6a DS |
1111 | |
1112 | if (parent) { | |
996c9314 LB |
1113 | pim_jp_agg_single_upstream_send(&parent->rpf, parent, |
1114 | true); | |
8022df6a | 1115 | } |
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]; | |
8dbdb215 DS |
1330 | zlog_debug("%s: (S,G)=%s[%s] upstream register stop timer %s", |
1331 | __PRETTY_FUNCTION__, up->sg_str, pim->vrf->name, | |
d62a17ae | 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) | |
2f5b0028 | 1357 | > pim->keep_alive_time) |
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; | |
d62a17ae | 1421 | struct pim_upstream *starup = up->parent; |
1422 | int output_intf = 0; | |
1423 | ||
1424 | if (up->rpf.source_nexthop.interface) | |
1425 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
1426 | else { | |
1427 | if (PIM_DEBUG_TRACE) | |
1428 | zlog_debug("%s: up %s RPF is not present", | |
1429 | __PRETTY_FUNCTION__, up->sg_str); | |
1430 | } | |
1431 | if (pim_ifp && !up->channel_oil) | |
611925dc DS |
1432 | up->channel_oil = pim_channel_oil_add( |
1433 | pim, &up->sg, pim_ifp->mroute_vif_index); | |
d62a17ae | 1434 | |
451fda4f | 1435 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
d62a17ae | 1436 | if (!ifp->info) |
1437 | continue; | |
1438 | ||
1439 | ch = pim_ifchannel_find(ifp, &up->sg); | |
1440 | ||
1441 | if (starup) | |
1442 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
1443 | else | |
1444 | starch = NULL; | |
1445 | ||
1446 | if (!ch && !starch) | |
1447 | continue; | |
1448 | ||
1449 | if (pim_upstream_evaluate_join_desired_interface(up, ch, | |
1450 | starch)) { | |
1451 | int flag = PIM_OIF_FLAG_PROTO_PIM; | |
1452 | ||
1453 | if (!ch) | |
1454 | flag = PIM_OIF_FLAG_PROTO_STAR; | |
1455 | ||
1456 | pim_channel_add_oif(up->channel_oil, ifp, flag); | |
1457 | output_intf++; | |
1458 | } | |
1459 | } | |
1460 | ||
1461 | return output_intf; | |
b5183fd1 DS |
1462 | } |
1463 | ||
1464 | /* | |
1465 | * For a given upstream, determine the inherited_olist | |
1466 | * and apply it. | |
1467 | * | |
1468 | * inherited_olist(S,G,rpt) = | |
1469 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1470 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1471 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1472 | * | |
1473 | * inherited_olist(S,G) = | |
1474 | * inherited_olist(S,G,rpt) (+) | |
1475 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1476 | * | |
1477 | * return 1 if there are any output interfaces | |
1478 | * return 0 if there are not any output interfaces | |
1479 | */ | |
9b29ea95 DS |
1480 | int pim_upstream_inherited_olist(struct pim_instance *pim, |
1481 | struct pim_upstream *up) | |
b5183fd1 | 1482 | { |
9b29ea95 | 1483 | int output_intf = pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 1484 | |
1485 | /* | |
1486 | * If we have output_intf switch state to Join and work like normal | |
1487 | * If we don't have an output_intf that means we are probably a | |
1488 | * switch on a stick so turn on forwarding to just accept the | |
1489 | * incoming packets so we don't bother the other stuff! | |
1490 | */ | |
1491 | if (output_intf) | |
1eca8576 | 1492 | pim_upstream_switch(pim, up, PIM_UPSTREAM_JOINED); |
d62a17ae | 1493 | else |
1494 | forward_on(up); | |
1495 | ||
1496 | return output_intf; | |
4fdc8f36 | 1497 | } |
d3dd1804 | 1498 | |
d62a17ae | 1499 | int pim_upstream_empty_inherited_olist(struct pim_upstream *up) |
80d9c3a0 | 1500 | { |
d62a17ae | 1501 | return pim_channel_oil_empty(up->channel_oil); |
80d9c3a0 DS |
1502 | } |
1503 | ||
d3dd1804 DS |
1504 | /* |
1505 | * When we have a new neighbor, | |
1506 | * find upstreams that don't have their rpf_addr | |
1507 | * set and see if the new neighbor allows | |
1508 | * the join to be sent | |
1509 | */ | |
9b29ea95 | 1510 | void pim_upstream_find_new_rpf(struct pim_instance *pim) |
d3dd1804 | 1511 | { |
d62a17ae | 1512 | struct listnode *up_node; |
1513 | struct listnode *up_nextnode; | |
1514 | struct pim_upstream *up; | |
1515 | ||
1516 | /* | |
1517 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
1518 | */ | |
9b29ea95 | 1519 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { |
d62a17ae | 1520 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { |
1521 | if (PIM_DEBUG_TRACE) | |
1522 | zlog_debug( | |
1523 | "Upstream %s without a path to send join, checking", | |
1524 | up->sg_str); | |
2002dcdb | 1525 | pim_rpf_update(pim, up, NULL, 1); |
d62a17ae | 1526 | } |
d3dd1804 | 1527 | } |
d3dd1804 | 1528 | } |
0f588989 | 1529 | |
7c591950 | 1530 | unsigned int pim_upstream_hash_key(void *arg) |
0f588989 | 1531 | { |
d62a17ae | 1532 | struct pim_upstream *up = (struct pim_upstream *)arg; |
0f588989 | 1533 | |
d62a17ae | 1534 | return jhash_2words(up->sg.src.s_addr, up->sg.grp.s_addr, 0); |
0f588989 DS |
1535 | } |
1536 | ||
9b29ea95 | 1537 | void pim_upstream_terminate(struct pim_instance *pim) |
0f588989 | 1538 | { |
172e45dc DS |
1539 | struct listnode *node, *nnode; |
1540 | struct pim_upstream *up; | |
1541 | ||
1542 | if (pim->upstream_list) { | |
1543 | for (ALL_LIST_ELEMENTS(pim->upstream_list, node, nnode, up)) | |
1544 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); | |
1545 | ||
affe9e99 | 1546 | list_delete_and_null(&pim->upstream_list); |
172e45dc | 1547 | } |
0f588989 | 1548 | |
9b29ea95 DS |
1549 | if (pim->upstream_hash) |
1550 | hash_free(pim->upstream_hash); | |
1551 | pim->upstream_hash = NULL; | |
0c68972d DS |
1552 | |
1553 | if (pim->upstream_sg_wheel) | |
1554 | wheel_delete(pim->upstream_sg_wheel); | |
1555 | pim->upstream_sg_wheel = NULL; | |
0f588989 DS |
1556 | } |
1557 | ||
7c591950 | 1558 | int pim_upstream_equal(const void *arg1, const void *arg2) |
0f588989 | 1559 | { |
d62a17ae | 1560 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
1561 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
0f588989 | 1562 | |
d62a17ae | 1563 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) |
1564 | && (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
1565 | return 1; | |
0f588989 | 1566 | |
d62a17ae | 1567 | return 0; |
0f588989 DS |
1568 | } |
1569 | ||
1bf16443 | 1570 | /* rfc4601:section-4.2:"Data Packet Forwarding Rules" defines |
1571 | * the cases where kat has to be restarted on rxing traffic - | |
1572 | * | |
1573 | * if( DirectlyConnected(S) == TRUE AND iif == RPF_interface(S) ) { | |
1574 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1575 | * # Note: a register state transition or UpstreamJPState(S,G) | |
1576 | * # transition may happen as a result of restarting | |
1577 | * # KeepaliveTimer, and must be dealt with here. | |
1578 | * } | |
1579 | * if( iif == RPF_interface(S) AND UpstreamJPState(S,G) == Joined AND | |
1580 | * inherited_olist(S,G) != NULL ) { | |
1581 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1582 | * } | |
1583 | */ | |
1584 | static bool pim_upstream_kat_start_ok(struct pim_upstream *up) | |
1585 | { | |
8e5f97e3 DS |
1586 | struct pim_instance *pim = up->channel_oil->pim; |
1587 | ||
d62a17ae | 1588 | /* "iif == RPF_interface(S)" check has to be done by the kernel or hw |
1589 | * so we will skip that here */ | |
1590 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1591 | up->sg.src)) { | |
1592 | return true; | |
1593 | } | |
1594 | ||
1595 | if ((up->join_state == PIM_UPSTREAM_JOINED) | |
1596 | && !pim_upstream_empty_inherited_olist(up)) { | |
1597 | /* XXX: I have added this RP check just for 3.2 and it's a | |
1598 | * digression from | |
1599 | * what rfc-4601 says. Till now we were only running KAT on FHR | |
1600 | * and RP and | |
1601 | * there is some angst around making the change to run it all | |
1602 | * routers that | |
1603 | * maintain the (S, G) state. This is tracked via CM-13601 and | |
1604 | * MUST be | |
1605 | * removed to handle spt turn-arounds correctly in a 3-tier clos | |
1606 | */ | |
8e5f97e3 | 1607 | if (I_am_RP(pim, up->sg.grp)) |
d62a17ae | 1608 | return true; |
1609 | } | |
1610 | ||
1611 | return false; | |
1bf16443 | 1612 | } |
1613 | ||
9c5e4d62 DS |
1614 | /* |
1615 | * Code to check and see if we've received packets on a S,G mroute | |
1616 | * and if so to set the SPT bit appropriately | |
1617 | */ | |
d62a17ae | 1618 | static void pim_upstream_sg_running(void *arg) |
9c5e4d62 | 1619 | { |
d62a17ae | 1620 | struct pim_upstream *up = (struct pim_upstream *)arg; |
8e5f97e3 | 1621 | struct pim_instance *pim = up->channel_oil->pim; |
d62a17ae | 1622 | |
1623 | // No packet can have arrived here if this is the case | |
8e5f97e3 | 1624 | if (!up->channel_oil->installed) { |
d62a17ae | 1625 | if (PIM_DEBUG_TRACE) |
6c65db5f | 1626 | zlog_debug("%s: %s[%s] is not installed in mroute", |
996c9314 LB |
1627 | __PRETTY_FUNCTION__, up->sg_str, |
1628 | pim->vrf->name); | |
d62a17ae | 1629 | return; |
1630 | } | |
1631 | ||
1632 | /* | |
1633 | * This is a bit of a hack | |
1634 | * We've noted that we should rescan but | |
1635 | * we've missed the window for doing so in | |
1636 | * pim_zebra.c for some reason. I am | |
1637 | * only doing this at this point in time | |
1638 | * to get us up and working for the moment | |
1639 | */ | |
1640 | if (up->channel_oil->oil_inherited_rescan) { | |
1641 | if (PIM_DEBUG_TRACE) | |
1642 | zlog_debug( | |
8dbdb215 | 1643 | "%s: Handling unscanned inherited_olist for %s[%s]", |
996c9314 LB |
1644 | __PRETTY_FUNCTION__, up->sg_str, |
1645 | pim->vrf->name); | |
8e5f97e3 | 1646 | pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 1647 | up->channel_oil->oil_inherited_rescan = 0; |
1648 | } | |
1649 | pim_mroute_update_counters(up->channel_oil); | |
1650 | ||
1651 | // Have we seen packets? | |
1652 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) | |
1653 | && (up->channel_oil->cc.lastused / 100 > 30)) { | |
1654 | if (PIM_DEBUG_TRACE) { | |
1655 | zlog_debug( | |
8dbdb215 DS |
1656 | "%s[%s]: %s old packet count is equal or lastused is greater than 30, (%ld,%ld,%lld)", |
1657 | __PRETTY_FUNCTION__, up->sg_str, pim->vrf->name, | |
d62a17ae | 1658 | up->channel_oil->cc.oldpktcnt, |
1659 | up->channel_oil->cc.pktcnt, | |
1660 | up->channel_oil->cc.lastused / 100); | |
1661 | } | |
1662 | return; | |
e43b8697 | 1663 | } |
d62a17ae | 1664 | |
1665 | if (pim_upstream_kat_start_ok(up)) { | |
1666 | /* Add a source reference to the stream if | |
1667 | * one doesn't already exist */ | |
1668 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
1669 | if (PIM_DEBUG_TRACE) | |
1670 | zlog_debug( | |
8dbdb215 DS |
1671 | "source reference created on kat restart %s[%s]", |
1672 | up->sg_str, pim->vrf->name); | |
d62a17ae | 1673 | |
1674 | pim_upstream_ref(up, PIM_UPSTREAM_FLAG_MASK_SRC_STREAM, | |
1675 | __PRETTY_FUNCTION__); | |
1676 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); | |
1677 | pim_upstream_fhr_kat_start(up); | |
1678 | } | |
19b807ca | 1679 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); |
d62a17ae | 1680 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) |
19b807ca | 1681 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); |
d62a17ae | 1682 | |
1683 | if (up->sptbit != PIM_UPSTREAM_SPTBIT_TRUE) { | |
1684 | pim_upstream_set_sptbit(up, up->rpf.source_nexthop.interface); | |
850a9f99 | 1685 | } |
d62a17ae | 1686 | return; |
9c5e4d62 DS |
1687 | } |
1688 | ||
9b29ea95 | 1689 | void pim_upstream_add_lhr_star_pimreg(struct pim_instance *pim) |
a7b2b1e2 | 1690 | { |
d62a17ae | 1691 | struct pim_upstream *up; |
1692 | struct listnode *node; | |
a7b2b1e2 | 1693 | |
9b29ea95 | 1694 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { |
d62a17ae | 1695 | if (up->sg.src.s_addr != INADDR_ANY) |
1696 | continue; | |
a7b2b1e2 | 1697 | |
d62a17ae | 1698 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) |
1699 | continue; | |
a7b2b1e2 | 1700 | |
9b29ea95 | 1701 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1702 | PIM_OIF_FLAG_PROTO_IGMP); |
1703 | } | |
a7b2b1e2 DS |
1704 | } |
1705 | ||
9b29ea95 DS |
1706 | void pim_upstream_spt_prefix_list_update(struct pim_instance *pim, |
1707 | struct prefix_list *pl) | |
df94f9a9 | 1708 | { |
d62a17ae | 1709 | const char *pname = prefix_list_name(pl); |
df94f9a9 | 1710 | |
9b29ea95 DS |
1711 | if (pim->spt.plist && strcmp(pim->spt.plist, pname) == 0) { |
1712 | pim_upstream_remove_lhr_star_pimreg(pim, pname); | |
d62a17ae | 1713 | } |
df94f9a9 DS |
1714 | } |
1715 | ||
1716 | /* | |
1717 | * nlist -> The new prefix list | |
1718 | * | |
1719 | * Per Group Application of pimreg to the OIL | |
1720 | * If the prefix list tells us DENY then | |
1721 | * we need to Switchover to SPT immediate | |
1722 | * so add the pimreg. | |
1723 | * If the prefix list tells us to ACCEPT than | |
1724 | * we need to Never do the SPT so remove | |
1725 | * the interface | |
1726 | * | |
1727 | */ | |
9b29ea95 DS |
1728 | void pim_upstream_remove_lhr_star_pimreg(struct pim_instance *pim, |
1729 | const char *nlist) | |
a7b2b1e2 | 1730 | { |
d62a17ae | 1731 | struct pim_upstream *up; |
1732 | struct listnode *node; | |
1733 | struct prefix_list *np; | |
1734 | struct prefix g; | |
1735 | enum prefix_list_type apply_new; | |
1736 | ||
1737 | np = prefix_list_lookup(AFI_IP, nlist); | |
1738 | ||
1739 | g.family = AF_INET; | |
1740 | g.prefixlen = IPV4_MAX_PREFIXLEN; | |
1741 | ||
9b29ea95 | 1742 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { |
d62a17ae | 1743 | if (up->sg.src.s_addr != INADDR_ANY) |
1744 | continue; | |
1745 | ||
1746 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) | |
1747 | continue; | |
1748 | ||
1749 | if (!nlist) { | |
9b29ea95 | 1750 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1751 | PIM_OIF_FLAG_PROTO_IGMP); |
1752 | continue; | |
1753 | } | |
1754 | g.u.prefix4 = up->sg.grp; | |
1755 | apply_new = prefix_list_apply(np, &g); | |
1756 | if (apply_new == PREFIX_DENY) | |
9b29ea95 | 1757 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1758 | PIM_OIF_FLAG_PROTO_IGMP); |
1759 | else | |
9b29ea95 | 1760 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1761 | PIM_OIF_FLAG_PROTO_IGMP); |
1762 | } | |
a7b2b1e2 DS |
1763 | } |
1764 | ||
9b29ea95 | 1765 | void pim_upstream_init(struct pim_instance *pim) |
0f588989 | 1766 | { |
9fb302f4 DS |
1767 | char hash_name[64]; |
1768 | ||
9b29ea95 | 1769 | pim->upstream_sg_wheel = |
d62a17ae | 1770 | wheel_init(master, 31000, 100, pim_upstream_hash_key, |
1771 | pim_upstream_sg_running); | |
9fb302f4 | 1772 | |
996c9314 | 1773 | snprintf(hash_name, 64, "PIM %s Upstream Hash", pim->vrf->name); |
9b29ea95 | 1774 | pim->upstream_hash = hash_create_size(8192, pim_upstream_hash_key, |
9fb302f4 | 1775 | pim_upstream_equal, hash_name); |
d62a17ae | 1776 | |
9b29ea95 | 1777 | pim->upstream_list = list_new(); |
9b29ea95 | 1778 | pim->upstream_list->cmp = pim_upstream_compare; |
0f588989 | 1779 | } |