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Commit | Line | Data |
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12e41d03 | 1 | /* |
896014f4 DL |
2 | * PIM for Quagga |
3 | * Copyright (C) 2008 Everton da Silva Marques | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; see the file COPYING; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
12e41d03 DL |
19 | |
20 | #include <zebra.h> | |
21 | ||
22 | #include "zebra/rib.h" | |
23 | ||
24 | #include "log.h" | |
25 | #include "zclient.h" | |
26 | #include "memory.h" | |
27 | #include "thread.h" | |
28 | #include "linklist.h" | |
dfe43e25 DW |
29 | #include "vty.h" |
30 | #include "plist.h" | |
0f588989 DS |
31 | #include "hash.h" |
32 | #include "jhash.h" | |
9c5e4d62 | 33 | #include "wheel.h" |
12e41d03 DL |
34 | |
35 | #include "pimd.h" | |
36 | #include "pim_pim.h" | |
37 | #include "pim_str.h" | |
38 | #include "pim_time.h" | |
39 | #include "pim_iface.h" | |
40 | #include "pim_join.h" | |
41 | #include "pim_zlookup.h" | |
42 | #include "pim_upstream.h" | |
43 | #include "pim_ifchannel.h" | |
44 | #include "pim_neighbor.h" | |
45 | #include "pim_rpf.h" | |
46 | #include "pim_zebra.h" | |
47 | #include "pim_oil.h" | |
48 | #include "pim_macro.h" | |
8f5f5e91 | 49 | #include "pim_rp.h" |
f14248dd | 50 | #include "pim_br.h" |
627ed2a3 | 51 | #include "pim_register.h" |
3c72d654 | 52 | #include "pim_msdp.h" |
982bff89 | 53 | #include "pim_jp_agg.h" |
1bc98276 | 54 | #include "pim_nht.h" |
15a5dafe | 55 | #include "pim_ssm.h" |
12e41d03 | 56 | |
982bff89 | 57 | static void join_timer_stop(struct pim_upstream *up); |
d62a17ae | 58 | static void |
59 | pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); | |
12e41d03 | 60 | |
cfa91a87 DS |
61 | /* |
62 | * A (*,G) or a (*,*) is going away | |
63 | * remove the parent pointer from | |
64 | * those pointing at us | |
65 | */ | |
9b29ea95 DS |
66 | static void pim_upstream_remove_children(struct pim_instance *pim, |
67 | struct pim_upstream *up) | |
cfa91a87 | 68 | { |
d62a17ae | 69 | struct pim_upstream *child; |
70 | ||
71 | if (!up->sources) | |
72 | return; | |
73 | ||
74 | while (!list_isempty(up->sources)) { | |
75 | child = listnode_head(up->sources); | |
76 | listnode_delete(up->sources, child); | |
77 | if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(child->flags)) { | |
78 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(child->flags); | |
9b29ea95 DS |
79 | child = pim_upstream_del(pim, child, |
80 | __PRETTY_FUNCTION__); | |
d62a17ae | 81 | } |
82 | if (child) | |
83 | child->parent = NULL; | |
84 | } | |
85 | list_delete(up->sources); | |
86 | up->sources = NULL; | |
cfa91a87 DS |
87 | } |
88 | ||
89 | /* | |
90 | * A (*,G) or a (*,*) is being created | |
91 | * Find the children that would point | |
92 | * at us. | |
93 | */ | |
9b29ea95 DS |
94 | static void pim_upstream_find_new_children(struct pim_instance *pim, |
95 | struct pim_upstream *up) | |
cfa91a87 | 96 | { |
d62a17ae | 97 | struct pim_upstream *child; |
98 | struct listnode *ch_node; | |
99 | ||
100 | if ((up->sg.src.s_addr != INADDR_ANY) | |
101 | && (up->sg.grp.s_addr != INADDR_ANY)) | |
102 | return; | |
103 | ||
104 | if ((up->sg.src.s_addr == INADDR_ANY) | |
105 | && (up->sg.grp.s_addr == INADDR_ANY)) | |
106 | return; | |
107 | ||
9b29ea95 | 108 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, ch_node, child)) { |
d62a17ae | 109 | if ((up->sg.grp.s_addr != INADDR_ANY) |
110 | && (child->sg.grp.s_addr == up->sg.grp.s_addr) | |
111 | && (child != up)) { | |
112 | child->parent = up; | |
113 | listnode_add_sort(up->sources, child); | |
114 | } | |
03417ccd | 115 | } |
cfa91a87 DS |
116 | } |
117 | ||
4d99418b DS |
118 | /* |
119 | * If we have a (*,*) || (S,*) there is no parent | |
120 | * If we have a (S,G), find the (*,G) | |
121 | * If we have a (*,G), find the (*,*) | |
122 | */ | |
9b29ea95 DS |
123 | static struct pim_upstream *pim_upstream_find_parent(struct pim_instance *pim, |
124 | struct pim_upstream *child) | |
4d99418b | 125 | { |
d62a17ae | 126 | struct prefix_sg any = child->sg; |
127 | struct pim_upstream *up = NULL; | |
4d99418b | 128 | |
d62a17ae | 129 | // (S,G) |
130 | if ((child->sg.src.s_addr != INADDR_ANY) | |
131 | && (child->sg.grp.s_addr != INADDR_ANY)) { | |
132 | any.src.s_addr = INADDR_ANY; | |
9b29ea95 | 133 | up = pim_upstream_find(pim, &any); |
03417ccd | 134 | |
d62a17ae | 135 | if (up) |
136 | listnode_add(up->sources, child); | |
03417ccd | 137 | |
d62a17ae | 138 | return up; |
139 | } | |
4d99418b | 140 | |
d62a17ae | 141 | return NULL; |
4d99418b DS |
142 | } |
143 | ||
12e41d03 DL |
144 | void pim_upstream_free(struct pim_upstream *up) |
145 | { | |
d62a17ae | 146 | XFREE(MTYPE_PIM_UPSTREAM, up); |
147 | up = NULL; | |
12e41d03 DL |
148 | } |
149 | ||
150 | static void upstream_channel_oil_detach(struct pim_upstream *up) | |
151 | { | |
d62a17ae | 152 | if (up->channel_oil) { |
153 | /* Detaching from channel_oil, channel_oil may exist post del, | |
154 | but upstream would not keep reference of it | |
155 | */ | |
156 | pim_channel_oil_del(up->channel_oil); | |
157 | up->channel_oil = NULL; | |
158 | } | |
12e41d03 DL |
159 | } |
160 | ||
9b29ea95 DS |
161 | struct pim_upstream *pim_upstream_del(struct pim_instance *pim, |
162 | struct pim_upstream *up, const char *name) | |
12e41d03 | 163 | { |
d62a17ae | 164 | bool notify_msdp = false; |
165 | struct prefix nht_p; | |
166 | ||
167 | if (PIM_DEBUG_TRACE) | |
168 | zlog_debug( | |
169 | "%s(%s): Delete %s ref count: %d , flags: %d c_oil ref count %d (Pre decrement)", | |
170 | __PRETTY_FUNCTION__, name, up->sg_str, up->ref_count, | |
171 | up->flags, up->channel_oil->oil_ref_count); | |
172 | ||
173 | --up->ref_count; | |
174 | ||
175 | if (up->ref_count >= 1) | |
176 | return up; | |
177 | ||
178 | THREAD_OFF(up->t_ka_timer); | |
179 | THREAD_OFF(up->t_rs_timer); | |
180 | THREAD_OFF(up->t_msdp_reg_timer); | |
181 | ||
182 | if (up->join_state == PIM_UPSTREAM_JOINED) { | |
183 | pim_jp_agg_single_upstream_send(&up->rpf, up, 0); | |
184 | ||
185 | if (up->sg.src.s_addr == INADDR_ANY) { | |
186 | /* if a (*, G) entry in the joined state is being | |
187 | * deleted we | |
188 | * need to notify MSDP */ | |
189 | notify_msdp = true; | |
190 | } | |
191 | } | |
192 | ||
193 | join_timer_stop(up); | |
194 | pim_jp_agg_upstream_verification(up, false); | |
195 | up->rpf.source_nexthop.interface = NULL; | |
196 | ||
197 | if (up->sg.src.s_addr != INADDR_ANY) { | |
9b29ea95 | 198 | wheel_remove_item(pim->upstream_sg_wheel, up); |
d62a17ae | 199 | notify_msdp = true; |
200 | } | |
201 | ||
9b29ea95 | 202 | pim_upstream_remove_children(pim, up); |
d62a17ae | 203 | if (up->sources) |
204 | list_delete(up->sources); | |
205 | up->sources = NULL; | |
206 | pim_mroute_del(up->channel_oil, __PRETTY_FUNCTION__); | |
207 | upstream_channel_oil_detach(up); | |
208 | ||
209 | list_delete(up->ifchannels); | |
210 | up->ifchannels = NULL; | |
211 | ||
212 | /* | |
213 | notice that listnode_delete() can't be moved | |
214 | into pim_upstream_free() because the later is | |
215 | called by list_delete_all_node() | |
216 | */ | |
217 | if (up->parent && up->parent->sources) | |
218 | listnode_delete(up->parent->sources, up); | |
219 | up->parent = NULL; | |
220 | ||
9b29ea95 DS |
221 | listnode_delete(pim->upstream_list, up); |
222 | hash_release(pim->upstream_hash, up); | |
d62a17ae | 223 | |
224 | if (notify_msdp) { | |
472ad383 | 225 | pim_msdp_up_del(pim, &up->sg); |
d62a17ae | 226 | } |
227 | ||
228 | /* Deregister addr with Zebra NHT */ | |
229 | nht_p.family = AF_INET; | |
230 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
231 | nht_p.u.prefix4 = up->upstream_addr; | |
232 | if (PIM_DEBUG_TRACE) { | |
233 | char buf[PREFIX2STR_BUFFER]; | |
234 | prefix2str(&nht_p, buf, sizeof(buf)); | |
235 | zlog_debug("%s: Deregister upstream %s addr %s with Zebra NHT", | |
236 | __PRETTY_FUNCTION__, up->sg_str, buf); | |
237 | } | |
9b29ea95 | 238 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL); |
d62a17ae | 239 | |
240 | pim_upstream_free(up); | |
241 | ||
242 | return NULL; | |
12e41d03 DL |
243 | } |
244 | ||
d62a17ae | 245 | void pim_upstream_send_join(struct pim_upstream *up) |
12e41d03 | 246 | { |
d62a17ae | 247 | if (PIM_DEBUG_TRACE) { |
248 | char rpf_str[PREFIX_STRLEN]; | |
249 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, | |
250 | sizeof(rpf_str)); | |
251 | zlog_debug("%s: RPF'%s=%s(%s) for Interface %s", | |
252 | __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
253 | pim_upstream_state2str(up->join_state), | |
254 | up->rpf.source_nexthop.interface->name); | |
255 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
256 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", | |
257 | __PRETTY_FUNCTION__, up->sg_str, rpf_str); | |
258 | /* warning only */ | |
259 | } | |
260 | } | |
261 | ||
262 | /* send Join(S,G) to the current upstream neighbor */ | |
263 | pim_jp_agg_single_upstream_send(&up->rpf, up, 1 /* join */); | |
12e41d03 DL |
264 | } |
265 | ||
266 | static int on_join_timer(struct thread *t) | |
267 | { | |
d62a17ae | 268 | struct pim_upstream *up; |
12e41d03 | 269 | |
d62a17ae | 270 | up = THREAD_ARG(t); |
12e41d03 | 271 | |
d62a17ae | 272 | /* |
273 | * In the case of a HFR we will not ahve anyone to send this to. | |
274 | */ | |
275 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) | |
276 | return 0; | |
bb6e291f | 277 | |
d62a17ae | 278 | /* |
279 | * Don't send the join if the outgoing interface is a loopback | |
280 | * But since this might change leave the join timer running | |
281 | */ | |
282 | if (up->rpf.source_nexthop | |
283 | .interface && !if_is_loopback(up->rpf.source_nexthop.interface)) | |
284 | pim_upstream_send_join(up); | |
12e41d03 | 285 | |
d62a17ae | 286 | join_timer_start(up); |
12e41d03 | 287 | |
d62a17ae | 288 | return 0; |
12e41d03 DL |
289 | } |
290 | ||
982bff89 | 291 | static void join_timer_stop(struct pim_upstream *up) |
12e41d03 | 292 | { |
d62a17ae | 293 | struct pim_neighbor *nbr; |
982bff89 | 294 | |
d62a17ae | 295 | THREAD_OFF(up->t_join_timer); |
7eb90689 | 296 | |
d62a17ae | 297 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, |
298 | up->rpf.rpf_addr.u.prefix4); | |
982bff89 | 299 | |
d62a17ae | 300 | if (nbr) |
301 | pim_jp_agg_remove_group(nbr->upstream_jp_agg, up); | |
982bff89 | 302 | |
d62a17ae | 303 | pim_jp_agg_upstream_verification(up, false); |
982bff89 DS |
304 | } |
305 | ||
d62a17ae | 306 | void join_timer_start(struct pim_upstream *up) |
982bff89 | 307 | { |
d62a17ae | 308 | struct pim_neighbor *nbr = NULL; |
309 | ||
310 | if (up->rpf.source_nexthop.interface) { | |
311 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, | |
312 | up->rpf.rpf_addr.u.prefix4); | |
313 | ||
314 | if (PIM_DEBUG_PIM_EVENTS) { | |
315 | zlog_debug( | |
316 | "%s: starting %d sec timer for upstream (S,G)=%s", | |
317 | __PRETTY_FUNCTION__, qpim_t_periodic, | |
318 | up->sg_str); | |
319 | } | |
320 | } | |
321 | ||
322 | if (nbr) | |
323 | pim_jp_agg_add_group(nbr->upstream_jp_agg, up, 1); | |
324 | else { | |
325 | THREAD_OFF(up->t_join_timer); | |
326 | thread_add_timer(master, on_join_timer, up, qpim_t_periodic, | |
327 | &up->t_join_timer); | |
328 | } | |
329 | pim_jp_agg_upstream_verification(up, true); | |
12e41d03 DL |
330 | } |
331 | ||
982bff89 DS |
332 | /* |
333 | * This is only called when we are switching the upstream | |
334 | * J/P from one neighbor to another | |
335 | * | |
336 | * As such we need to remove from the old list and | |
337 | * add to the new list. | |
338 | */ | |
d62a17ae | 339 | void pim_upstream_join_timer_restart(struct pim_upstream *up, |
340 | struct pim_rpf *old) | |
12e41d03 | 341 | { |
d62a17ae | 342 | // THREAD_OFF(up->t_join_timer); |
343 | join_timer_start(up); | |
12e41d03 DL |
344 | } |
345 | ||
346 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
347 | int interval_msec) | |
348 | { | |
d62a17ae | 349 | if (PIM_DEBUG_PIM_EVENTS) { |
350 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", | |
351 | __PRETTY_FUNCTION__, interval_msec, up->sg_str); | |
352 | } | |
353 | ||
354 | THREAD_OFF(up->t_join_timer); | |
355 | thread_add_timer_msec(master, on_join_timer, up, interval_msec, | |
356 | &up->t_join_timer); | |
12e41d03 DL |
357 | } |
358 | ||
359 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
d62a17ae | 360 | struct in_addr rpf_addr, int holdtime) |
12e41d03 | 361 | { |
d62a17ae | 362 | long t_joinsuppress_msec; |
363 | long join_timer_remain_msec; | |
364 | ||
365 | t_joinsuppress_msec = | |
366 | MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
367 | 1000 * holdtime); | |
368 | ||
369 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
370 | ||
371 | if (PIM_DEBUG_TRACE) { | |
372 | char rpf_str[INET_ADDRSTRLEN]; | |
373 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); | |
374 | zlog_debug( | |
375 | "%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", | |
376 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
377 | join_timer_remain_msec, t_joinsuppress_msec); | |
378 | } | |
379 | ||
380 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
381 | if (PIM_DEBUG_TRACE) { | |
382 | zlog_debug( | |
383 | "%s %s: suppressing Join(S,G)=%s for %ld msec", | |
384 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, | |
385 | t_joinsuppress_msec); | |
386 | } | |
387 | ||
388 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
389 | } | |
12e41d03 DL |
390 | } |
391 | ||
392 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
d62a17ae | 393 | struct pim_upstream *up) |
12e41d03 | 394 | { |
d62a17ae | 395 | long join_timer_remain_msec; |
396 | int t_override_msec; | |
397 | ||
398 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
399 | t_override_msec = | |
400 | pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
401 | ||
402 | if (PIM_DEBUG_TRACE) { | |
403 | char rpf_str[INET_ADDRSTRLEN]; | |
404 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr.u.prefix4, rpf_str, | |
405 | sizeof(rpf_str)); | |
406 | zlog_debug( | |
407 | "%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", | |
408 | debug_label, up->sg_str, rpf_str, | |
409 | join_timer_remain_msec, t_override_msec); | |
410 | } | |
411 | ||
412 | if (join_timer_remain_msec > t_override_msec) { | |
413 | if (PIM_DEBUG_TRACE) { | |
414 | zlog_debug( | |
415 | "%s: decreasing (S,G)=%s join timer to t_override=%d msec", | |
416 | debug_label, up->sg_str, t_override_msec); | |
417 | } | |
418 | ||
419 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
420 | } | |
12e41d03 DL |
421 | } |
422 | ||
423 | static void forward_on(struct pim_upstream *up) | |
424 | { | |
d62a17ae | 425 | struct listnode *chnode; |
426 | struct listnode *chnextnode; | |
427 | struct pim_ifchannel *ch = NULL; | |
12e41d03 | 428 | |
d62a17ae | 429 | /* scan (S,G) state */ |
430 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
431 | if (pim_macro_chisin_oiflist(ch)) | |
432 | pim_forward_start(ch); | |
12e41d03 | 433 | |
d62a17ae | 434 | } /* scan iface channel list */ |
12e41d03 DL |
435 | } |
436 | ||
437 | static void forward_off(struct pim_upstream *up) | |
438 | { | |
d62a17ae | 439 | struct listnode *chnode; |
440 | struct listnode *chnextnode; | |
441 | struct pim_ifchannel *ch; | |
12e41d03 | 442 | |
d62a17ae | 443 | /* scan per-interface (S,G) state */ |
444 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
12e41d03 | 445 | |
d62a17ae | 446 | pim_forward_stop(ch); |
12e41d03 | 447 | |
d62a17ae | 448 | } /* scan iface channel list */ |
12e41d03 DL |
449 | } |
450 | ||
d62a17ae | 451 | static int pim_upstream_could_register(struct pim_upstream *up) |
bb6e291f | 452 | { |
d62a17ae | 453 | struct pim_interface *pim_ifp = NULL; |
454 | ||
455 | if (up->rpf.source_nexthop.interface) | |
456 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
457 | else { | |
458 | if (PIM_DEBUG_TRACE) | |
459 | zlog_debug("%s: up %s RPF is not present", | |
460 | __PRETTY_FUNCTION__, up->sg_str); | |
461 | } | |
bb6e291f | 462 | |
d62a17ae | 463 | if (pim_ifp && PIM_I_am_DR(pim_ifp) |
464 | && pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
465 | up->sg.src)) | |
466 | return 1; | |
bb6e291f | 467 | |
d62a17ae | 468 | return 0; |
bb6e291f DS |
469 | } |
470 | ||
15a5dafe | 471 | /* Source registration is supressed for SSM groups. When the SSM range changes |
472 | * we re-revaluate register setup for existing upstream entries */ | |
9b29ea95 | 473 | void pim_upstream_register_reevaluate(struct pim_instance *pim) |
15a5dafe | 474 | { |
d62a17ae | 475 | struct listnode *upnode; |
476 | struct pim_upstream *up; | |
477 | ||
9b29ea95 | 478 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
d62a17ae | 479 | /* If FHR is set CouldRegister is True. Also check if the flow |
480 | * is actually active; if it is not kat setup will trigger | |
481 | * source | |
482 | * registration whenever the flow becomes active. */ | |
483 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) || !up->t_ka_timer) | |
484 | continue; | |
485 | ||
6f439a70 | 486 | if (pim_is_grp_ssm(pim, up->sg.grp)) { |
d62a17ae | 487 | /* clear the register state for SSM groups */ |
488 | if (up->reg_state != PIM_REG_NOINFO) { | |
489 | if (PIM_DEBUG_PIM_EVENTS) | |
490 | zlog_debug( | |
491 | "Clear register for %s as G is now SSM", | |
492 | up->sg_str); | |
493 | /* remove regiface from the OIL if it is there*/ | |
494 | pim_channel_del_oif(up->channel_oil, | |
9b29ea95 | 495 | pim->regiface, |
d62a17ae | 496 | PIM_OIF_FLAG_PROTO_PIM); |
497 | up->reg_state = PIM_REG_NOINFO; | |
498 | } | |
499 | } else { | |
500 | /* register ASM sources with the RP */ | |
501 | if (up->reg_state == PIM_REG_NOINFO) { | |
502 | if (PIM_DEBUG_PIM_EVENTS) | |
503 | zlog_debug( | |
504 | "Register %s as G is now ASM", | |
505 | up->sg_str); | |
506 | pim_channel_add_oif(up->channel_oil, | |
9b29ea95 | 507 | pim->regiface, |
d62a17ae | 508 | PIM_OIF_FLAG_PROTO_PIM); |
509 | up->reg_state = PIM_REG_JOIN; | |
510 | } | |
511 | } | |
512 | } | |
15a5dafe | 513 | } |
514 | ||
1eca8576 | 515 | void pim_upstream_switch(struct pim_instance *pim, struct pim_upstream *up, |
d62a17ae | 516 | enum pim_upstream_state new_state) |
12e41d03 | 517 | { |
d62a17ae | 518 | enum pim_upstream_state old_state = up->join_state; |
519 | ||
520 | if (PIM_DEBUG_PIM_EVENTS) { | |
521 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", | |
522 | __PRETTY_FUNCTION__, up->sg_str, | |
523 | pim_upstream_state2str(up->join_state), | |
524 | pim_upstream_state2str(new_state)); | |
525 | } | |
526 | ||
527 | up->join_state = new_state; | |
528 | if (old_state != new_state) | |
529 | up->state_transition = pim_time_monotonic_sec(); | |
530 | ||
531 | pim_upstream_update_assert_tracking_desired(up); | |
532 | ||
533 | if (new_state == PIM_UPSTREAM_JOINED) { | |
534 | if (old_state != PIM_UPSTREAM_JOINED) { | |
535 | int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags); | |
536 | forward_on(up); | |
1eca8576 | 537 | pim_msdp_up_join_state_changed(pim, up); |
d62a17ae | 538 | if (pim_upstream_could_register(up)) { |
539 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
540 | if (!old_fhr | |
541 | && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM( | |
542 | up->flags)) { | |
543 | pim_upstream_keep_alive_timer_start( | |
544 | up, qpim_keep_alive_time); | |
545 | pim_register_join(up); | |
546 | } | |
547 | } else { | |
548 | pim_upstream_send_join(up); | |
549 | join_timer_start(up); | |
550 | } | |
551 | } else { | |
552 | forward_on(up); | |
553 | } | |
554 | } else { | |
555 | ||
556 | forward_off(up); | |
557 | if (old_state == PIM_UPSTREAM_JOINED) | |
1eca8576 | 558 | pim_msdp_up_join_state_changed(pim, up); |
d62a17ae | 559 | |
560 | /* IHR, Trigger SGRpt on *,G IIF to prune S,G from RPT towards | |
561 | RP. | |
562 | If I am RP for G then send S,G prune to its IIF. */ | |
563 | if (pim_upstream_is_sg_rpt(up) && up->parent | |
1eca8576 | 564 | && !I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 565 | if (PIM_DEBUG_PIM_TRACE_DETAIL) |
566 | zlog_debug( | |
567 | "%s: *,G IIF %s S,G IIF %s ", | |
568 | __PRETTY_FUNCTION__, | |
569 | up->parent->rpf.source_nexthop | |
570 | .interface->name, | |
571 | up->rpf.source_nexthop.interface->name); | |
572 | pim_jp_agg_single_upstream_send(&up->parent->rpf, | |
573 | up->parent, | |
574 | 1 /* (W,G) Join */); | |
575 | } else | |
576 | pim_jp_agg_single_upstream_send(&up->rpf, up, | |
577 | 0 /* prune */); | |
578 | join_timer_stop(up); | |
579 | } | |
12e41d03 DL |
580 | } |
581 | ||
d62a17ae | 582 | int pim_upstream_compare(void *arg1, void *arg2) |
03417ccd | 583 | { |
d62a17ae | 584 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
585 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
03417ccd | 586 | |
d62a17ae | 587 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) |
588 | return -1; | |
03417ccd | 589 | |
d62a17ae | 590 | if (ntohl(up1->sg.grp.s_addr) > ntohl(up2->sg.grp.s_addr)) |
591 | return 1; | |
03417ccd | 592 | |
d62a17ae | 593 | if (ntohl(up1->sg.src.s_addr) < ntohl(up2->sg.src.s_addr)) |
594 | return -1; | |
03417ccd | 595 | |
d62a17ae | 596 | if (ntohl(up1->sg.src.s_addr) > ntohl(up2->sg.src.s_addr)) |
597 | return 1; | |
03417ccd | 598 | |
d62a17ae | 599 | return 0; |
03417ccd DS |
600 | } |
601 | ||
2002dcdb DS |
602 | static struct pim_upstream *pim_upstream_new(struct pim_instance *pim, |
603 | struct prefix_sg *sg, | |
604 | struct interface *incoming, | |
0885a9f1 DS |
605 | int flags, |
606 | struct pim_ifchannel *ch) | |
12e41d03 | 607 | { |
d62a17ae | 608 | enum pim_rpf_result rpf_result; |
609 | struct pim_interface *pim_ifp; | |
610 | struct pim_upstream *up; | |
611 | ||
612 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); | |
613 | if (!up) { | |
614 | zlog_err("%s: PIM XCALLOC(%zu) failure", __PRETTY_FUNCTION__, | |
615 | sizeof(*up)); | |
616 | return NULL; | |
617 | } | |
618 | ||
619 | up->sg = *sg; | |
620 | pim_str_sg_set(sg, up->sg_str); | |
0885a9f1 DS |
621 | if (ch) |
622 | ch->upstream = up; | |
623 | ||
9b29ea95 | 624 | up = hash_get(pim->upstream_hash, up, hash_alloc_intern); |
d9c9a9ee DS |
625 | if (!pim_rp_set_upstream_addr(pim, &up->upstream_addr, sg->src, |
626 | sg->grp)) { | |
d62a17ae | 627 | if (PIM_DEBUG_TRACE) |
628 | zlog_debug("%s: Received a (*,G) with no RP configured", | |
629 | __PRETTY_FUNCTION__); | |
630 | ||
9b29ea95 | 631 | hash_release(pim->upstream_hash, up); |
d62a17ae | 632 | XFREE(MTYPE_PIM_UPSTREAM, up); |
633 | return NULL; | |
634 | } | |
635 | ||
9b29ea95 | 636 | up->parent = pim_upstream_find_parent(pim, up); |
d62a17ae | 637 | if (up->sg.src.s_addr == INADDR_ANY) { |
638 | up->sources = list_new(); | |
639 | up->sources->cmp = pim_upstream_compare; | |
640 | } else | |
641 | up->sources = NULL; | |
642 | ||
9b29ea95 | 643 | pim_upstream_find_new_children(pim, up); |
d62a17ae | 644 | up->flags = flags; |
645 | up->ref_count = 1; | |
646 | up->t_join_timer = NULL; | |
647 | up->t_ka_timer = NULL; | |
648 | up->t_rs_timer = NULL; | |
649 | up->t_msdp_reg_timer = NULL; | |
650 | up->join_state = PIM_UPSTREAM_NOTJOINED; | |
651 | up->reg_state = PIM_REG_NOINFO; | |
652 | up->state_transition = pim_time_monotonic_sec(); | |
653 | up->channel_oil = NULL; | |
654 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; | |
655 | ||
656 | up->rpf.source_nexthop.interface = NULL; | |
657 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; | |
658 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = | |
659 | PIM_NET_INADDR_ANY; | |
660 | up->rpf.source_nexthop.mrib_metric_preference = | |
661 | qpim_infinite_assert_metric.metric_preference; | |
662 | up->rpf.source_nexthop.mrib_route_metric = | |
663 | qpim_infinite_assert_metric.route_metric; | |
664 | up->rpf.rpf_addr.family = AF_INET; | |
665 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
666 | ||
667 | up->ifchannels = list_new(); | |
668 | up->ifchannels->cmp = (int (*)(void *, void *))pim_ifchannel_compare; | |
669 | ||
670 | if (up->sg.src.s_addr != INADDR_ANY) | |
9b29ea95 | 671 | wheel_add_item(pim->upstream_sg_wheel, up); |
d62a17ae | 672 | |
2002dcdb | 673 | rpf_result = pim_rpf_update(pim, up, NULL, 1); |
d62a17ae | 674 | if (rpf_result == PIM_RPF_FAILURE) { |
675 | struct prefix nht_p; | |
676 | ||
677 | if (PIM_DEBUG_TRACE) | |
678 | zlog_debug( | |
679 | "%s: Attempting to create upstream(%s), Unable to RPF for source", | |
680 | __PRETTY_FUNCTION__, up->sg_str); | |
681 | ||
682 | nht_p.family = AF_INET; | |
683 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
684 | nht_p.u.prefix4 = up->upstream_addr; | |
2002dcdb | 685 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL); |
d62a17ae | 686 | |
687 | if (up->parent) { | |
688 | listnode_delete(up->parent->sources, up); | |
689 | up->parent = NULL; | |
690 | } | |
691 | ||
692 | if (up->sg.src.s_addr != INADDR_ANY) | |
9b29ea95 | 693 | wheel_remove_item(pim->upstream_sg_wheel, up); |
d62a17ae | 694 | |
9b29ea95 | 695 | pim_upstream_remove_children(pim, up); |
d62a17ae | 696 | if (up->sources) |
697 | list_delete(up->sources); | |
698 | ||
9b29ea95 | 699 | hash_release(pim->upstream_hash, up); |
d62a17ae | 700 | XFREE(MTYPE_PIM_UPSTREAM, up); |
701 | return NULL; | |
702 | } | |
703 | ||
704 | if (up->rpf.source_nexthop.interface) { | |
705 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
706 | if (pim_ifp) | |
707 | up->channel_oil = pim_channel_oil_add( | |
611925dc | 708 | pim, &up->sg, pim_ifp->mroute_vif_index); |
d62a17ae | 709 | } |
9b29ea95 | 710 | listnode_add_sort(pim->upstream_list, up); |
d62a17ae | 711 | |
712 | if (PIM_DEBUG_TRACE) { | |
713 | zlog_debug( | |
714 | "%s: Created Upstream %s upstream_addr %s ref count %d increment", | |
715 | __PRETTY_FUNCTION__, up->sg_str, | |
716 | inet_ntoa(up->upstream_addr), up->ref_count); | |
717 | } | |
718 | ||
719 | return up; | |
12e41d03 DL |
720 | } |
721 | ||
9b29ea95 DS |
722 | struct pim_upstream *pim_upstream_find(struct pim_instance *pim, |
723 | struct prefix_sg *sg) | |
12e41d03 | 724 | { |
d62a17ae | 725 | struct pim_upstream lookup; |
726 | struct pim_upstream *up = NULL; | |
12e41d03 | 727 | |
d62a17ae | 728 | lookup.sg = *sg; |
9b29ea95 | 729 | up = hash_lookup(pim->upstream_hash, &lookup); |
d62a17ae | 730 | return up; |
12e41d03 DL |
731 | } |
732 | ||
d62a17ae | 733 | struct pim_upstream *pim_upstream_find_or_add(struct prefix_sg *sg, |
734 | struct interface *incoming, | |
735 | int flags, const char *name) | |
e711cd3c | 736 | { |
d62a17ae | 737 | struct pim_upstream *up; |
9b29ea95 DS |
738 | struct pim_interface *pim_ifp; |
739 | ||
740 | pim_ifp = incoming->info; | |
d62a17ae | 741 | |
9b29ea95 | 742 | up = pim_upstream_find(pim_ifp->pim, sg); |
d62a17ae | 743 | |
744 | if (up) { | |
745 | if (!(up->flags & flags)) { | |
746 | up->flags |= flags; | |
747 | up->ref_count++; | |
748 | if (PIM_DEBUG_TRACE) | |
749 | zlog_debug( | |
750 | "%s(%s): upstream %s ref count %d increment", | |
751 | __PRETTY_FUNCTION__, name, up->sg_str, | |
752 | up->ref_count); | |
753 | } | |
754 | } else | |
0885a9f1 DS |
755 | up = pim_upstream_add(pim_ifp->pim, sg, incoming, flags, name, |
756 | NULL); | |
d62a17ae | 757 | |
758 | return up; | |
e711cd3c DS |
759 | } |
760 | ||
d62a17ae | 761 | void pim_upstream_ref(struct pim_upstream *up, int flags, const char *name) |
1bf16443 | 762 | { |
d62a17ae | 763 | up->flags |= flags; |
764 | ++up->ref_count; | |
765 | if (PIM_DEBUG_TRACE) | |
766 | zlog_debug("%s(%s): upstream %s ref count %d increment", | |
767 | __PRETTY_FUNCTION__, name, up->sg_str, | |
768 | up->ref_count); | |
1bf16443 | 769 | } |
770 | ||
2002dcdb DS |
771 | struct pim_upstream *pim_upstream_add(struct pim_instance *pim, |
772 | struct prefix_sg *sg, | |
d62a17ae | 773 | struct interface *incoming, int flags, |
0885a9f1 DS |
774 | const char *name, |
775 | struct pim_ifchannel *ch) | |
12e41d03 | 776 | { |
d62a17ae | 777 | struct pim_upstream *up = NULL; |
778 | int found = 0; | |
9b29ea95 | 779 | |
2002dcdb | 780 | up = pim_upstream_find(pim, sg); |
d62a17ae | 781 | if (up) { |
782 | pim_upstream_ref(up, flags, name); | |
783 | found = 1; | |
784 | } else { | |
0885a9f1 | 785 | up = pim_upstream_new(pim, sg, incoming, flags, ch); |
d62a17ae | 786 | } |
787 | ||
788 | if (PIM_DEBUG_TRACE) { | |
789 | if (up) { | |
790 | char buf[PREFIX2STR_BUFFER]; | |
791 | prefix2str(&up->rpf.rpf_addr, buf, sizeof(buf)); | |
792 | zlog_debug("%s(%s): %s, iif %s (%s) found: %d: ref_count: %d", | |
f4075cb4 | 793 | __PRETTY_FUNCTION__, name, |
55785900 CS |
794 | up->sg_str, buf, up->rpf.source_nexthop.interface ? |
795 | up->rpf.source_nexthop.interface->name : "NIL" , | |
796 | found, up->ref_count); | |
d62a17ae | 797 | } else |
798 | zlog_debug("%s(%s): (%s) failure to create", | |
799 | __PRETTY_FUNCTION__, name, | |
800 | pim_str_sg_dump(sg)); | |
801 | } | |
12e41d03 | 802 | |
d62a17ae | 803 | return up; |
12e41d03 DL |
804 | } |
805 | ||
c8fc07cb DS |
806 | /* |
807 | * Passed in up must be the upstream for ch. starch is NULL if no | |
808 | * information | |
809 | */ | |
d62a17ae | 810 | int pim_upstream_evaluate_join_desired_interface(struct pim_upstream *up, |
811 | struct pim_ifchannel *ch, | |
812 | struct pim_ifchannel *starch) | |
7a3ddda5 | 813 | { |
d62a17ae | 814 | if (ch) { |
815 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
816 | return 0; | |
817 | ||
818 | if (!pim_macro_ch_lost_assert(ch) | |
819 | && pim_macro_chisin_joins_or_include(ch)) | |
820 | return 1; | |
821 | } | |
822 | ||
823 | /* | |
824 | * joins (*,G) | |
825 | */ | |
826 | if (starch) { | |
827 | if (PIM_IF_FLAG_TEST_S_G_RPT(starch->upstream->flags)) | |
828 | return 0; | |
829 | ||
830 | if (!pim_macro_ch_lost_assert(starch) | |
831 | && pim_macro_chisin_joins_or_include(starch)) | |
832 | return 1; | |
833 | } | |
834 | ||
835 | return 0; | |
7a3ddda5 DS |
836 | } |
837 | ||
12e41d03 DL |
838 | /* |
839 | Evaluate JoinDesired(S,G): | |
840 | ||
841 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
842 | in the set: | |
843 | ||
844 | inherited_olist(S,G) = | |
845 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
846 | ||
847 | JoinDesired(S,G) may be affected by changes in the following: | |
848 | ||
849 | pim_ifp->primary_address | |
850 | pim_ifp->pim_dr_addr | |
851 | ch->ifassert_winner_metric | |
852 | ch->ifassert_winner | |
d62a17ae | 853 | ch->local_ifmembership |
12e41d03 DL |
854 | ch->ifjoin_state |
855 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
856 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
857 | ch->upstream->rpf.source_nexthop.interface | |
858 | ||
859 | See also pim_upstream_update_join_desired() below. | |
860 | */ | |
9b29ea95 DS |
861 | int pim_upstream_evaluate_join_desired(struct pim_instance *pim, |
862 | struct pim_upstream *up) | |
12e41d03 | 863 | { |
d62a17ae | 864 | struct interface *ifp; |
865 | struct listnode *node; | |
866 | struct pim_ifchannel *ch, *starch; | |
867 | struct pim_upstream *starup = up->parent; | |
868 | int ret = 0; | |
12e41d03 | 869 | |
9b29ea95 | 870 | for (ALL_LIST_ELEMENTS_RO(vrf_iflist(pim->vrf_id), node, ifp)) { |
d62a17ae | 871 | if (!ifp->info) |
872 | continue; | |
c8fc07cb | 873 | |
d62a17ae | 874 | ch = pim_ifchannel_find(ifp, &up->sg); |
c8fc07cb | 875 | |
d62a17ae | 876 | if (starup) |
877 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
878 | else | |
879 | starch = NULL; | |
c8fc07cb | 880 | |
d62a17ae | 881 | if (!ch && !starch) |
882 | continue; | |
12e41d03 | 883 | |
d62a17ae | 884 | ret += pim_upstream_evaluate_join_desired_interface(up, ch, |
885 | starch); | |
886 | } /* scan iface channel list */ | |
12e41d03 | 887 | |
d62a17ae | 888 | return ret; /* false */ |
12e41d03 DL |
889 | } |
890 | ||
891 | /* | |
892 | See also pim_upstream_evaluate_join_desired() above. | |
893 | */ | |
9b29ea95 DS |
894 | void pim_upstream_update_join_desired(struct pim_instance *pim, |
895 | struct pim_upstream *up) | |
12e41d03 | 896 | { |
d62a17ae | 897 | int was_join_desired; /* boolean */ |
898 | int is_join_desired; /* boolean */ | |
899 | ||
900 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
901 | ||
9b29ea95 | 902 | is_join_desired = pim_upstream_evaluate_join_desired(pim, up); |
d62a17ae | 903 | if (is_join_desired) |
904 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
905 | else | |
906 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
907 | ||
908 | /* switched from false to true */ | |
909 | if (is_join_desired && !was_join_desired) { | |
1eca8576 | 910 | pim_upstream_switch(pim, up, PIM_UPSTREAM_JOINED); |
d62a17ae | 911 | return; |
912 | } | |
913 | ||
914 | /* switched from true to false */ | |
915 | if (!is_join_desired && was_join_desired) { | |
1eca8576 | 916 | pim_upstream_switch(pim, up, PIM_UPSTREAM_NOTJOINED); |
d62a17ae | 917 | return; |
918 | } | |
12e41d03 DL |
919 | } |
920 | ||
921 | /* | |
922 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
923 | Transitions from Joined State | |
924 | RPF'(S,G) GenID changes | |
925 | ||
926 | The upstream (S,G) state machine remains in Joined state. If the | |
927 | Join Timer is set to expire in more than t_override seconds, reset | |
928 | it so that it expires after t_override seconds. | |
929 | */ | |
9b29ea95 DS |
930 | void pim_upstream_rpf_genid_changed(struct pim_instance *pim, |
931 | struct in_addr neigh_addr) | |
12e41d03 | 932 | { |
d62a17ae | 933 | struct listnode *up_node; |
934 | struct listnode *up_nextnode; | |
935 | struct pim_upstream *up; | |
936 | ||
937 | /* | |
938 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
939 | */ | |
9b29ea95 | 940 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { |
d62a17ae | 941 | |
942 | if (PIM_DEBUG_TRACE) { | |
943 | char neigh_str[INET_ADDRSTRLEN]; | |
944 | char rpf_addr_str[PREFIX_STRLEN]; | |
945 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, | |
946 | sizeof(neigh_str)); | |
947 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, | |
948 | sizeof(rpf_addr_str)); | |
949 | zlog_debug( | |
950 | "%s: matching neigh=%s against upstream (S,G)=%s joined=%d rpf_addr=%s", | |
951 | __PRETTY_FUNCTION__, neigh_str, up->sg_str, | |
952 | up->join_state == PIM_UPSTREAM_JOINED, | |
953 | rpf_addr_str); | |
954 | } | |
955 | ||
956 | /* consider only (S,G) upstream in Joined state */ | |
957 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
958 | continue; | |
959 | ||
960 | /* match RPF'(S,G)=neigh_addr */ | |
961 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) | |
962 | continue; | |
963 | ||
964 | pim_upstream_join_timer_decrease_to_t_override( | |
965 | "RPF'(S,G) GenID change", up); | |
966 | } | |
12e41d03 DL |
967 | } |
968 | ||
969 | ||
970 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
971 | struct interface *old_rpf_ifp) | |
972 | { | |
d62a17ae | 973 | struct listnode *chnode; |
974 | struct listnode *chnextnode; | |
975 | struct pim_ifchannel *ch; | |
976 | ||
977 | /* search all ifchannels */ | |
978 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
979 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
980 | if ( | |
981 | /* RPF_interface(S) was NOT I */ | |
982 | (old_rpf_ifp == ch->interface) && | |
983 | /* RPF_interface(S) stopped being I */ | |
984 | (ch->upstream->rpf.source_nexthop | |
985 | .interface != ch->interface)) { | |
986 | assert_action_a5(ch); | |
987 | } | |
988 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
989 | ||
990 | pim_ifchannel_update_assert_tracking_desired(ch); | |
991 | } | |
12e41d03 DL |
992 | } |
993 | ||
994 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
995 | { | |
d62a17ae | 996 | struct listnode *chnode; |
997 | struct listnode *chnextnode; | |
998 | struct pim_ifchannel *ch; | |
999 | ||
1000 | /* scan per-interface (S,G) state */ | |
1001 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1002 | pim_ifchannel_update_could_assert(ch); | |
1003 | } /* scan iface channel list */ | |
12e41d03 DL |
1004 | } |
1005 | ||
1006 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
1007 | { | |
d62a17ae | 1008 | struct listnode *chnode; |
1009 | struct listnode *chnextnode; | |
1010 | struct pim_ifchannel *ch; | |
12e41d03 | 1011 | |
d62a17ae | 1012 | /* scan per-interface (S,G) state */ |
1013 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1014 | pim_ifchannel_update_my_assert_metric(ch); | |
12e41d03 | 1015 | |
d62a17ae | 1016 | } /* scan iface channel list */ |
12e41d03 DL |
1017 | } |
1018 | ||
1019 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
1020 | { | |
d62a17ae | 1021 | struct listnode *chnode; |
1022 | struct listnode *chnextnode; | |
1023 | struct pim_interface *pim_ifp; | |
1024 | struct pim_ifchannel *ch; | |
1025 | ||
1026 | /* scan per-interface (S,G) state */ | |
1027 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1028 | if (!ch->interface) | |
1029 | continue; | |
1030 | pim_ifp = ch->interface->info; | |
1031 | if (!pim_ifp) | |
1032 | continue; | |
1033 | ||
1034 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1035 | ||
1036 | } /* scan iface channel list */ | |
12e41d03 | 1037 | } |
f14248dd | 1038 | |
1bf16443 | 1039 | /* When kat is stopped CouldRegister goes to false so we need to |
1040 | * transition the (S, G) on FHR to NI state and remove reg tunnel | |
1041 | * from the OIL */ | |
9b29ea95 DS |
1042 | static void pim_upstream_fhr_kat_expiry(struct pim_instance *pim, |
1043 | struct pim_upstream *up) | |
1bf16443 | 1044 | { |
d62a17ae | 1045 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
1046 | return; | |
1047 | ||
1048 | if (PIM_DEBUG_TRACE) | |
1049 | zlog_debug("kat expired on %s; clear fhr reg state", | |
1050 | up->sg_str); | |
1051 | ||
1052 | /* stop reg-stop timer */ | |
1053 | THREAD_OFF(up->t_rs_timer); | |
1054 | /* remove regiface from the OIL if it is there*/ | |
9b29ea95 | 1055 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1056 | PIM_OIF_FLAG_PROTO_PIM); |
1057 | /* clear the register state */ | |
1058 | up->reg_state = PIM_REG_NOINFO; | |
1059 | PIM_UPSTREAM_FLAG_UNSET_FHR(up->flags); | |
1bf16443 | 1060 | } |
1061 | ||
1062 | /* When kat is started CouldRegister can go to true. And if it does we | |
1063 | * need to transition the (S, G) on FHR to JOINED state and add reg tunnel | |
1064 | * to the OIL */ | |
1065 | static void pim_upstream_fhr_kat_start(struct pim_upstream *up) | |
1066 | { | |
d62a17ae | 1067 | if (pim_upstream_could_register(up)) { |
1068 | if (PIM_DEBUG_TRACE) | |
1069 | zlog_debug( | |
1070 | "kat started on %s; set fhr reg state to joined", | |
1071 | up->sg_str); | |
1072 | ||
1073 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
1074 | if (up->reg_state == PIM_REG_NOINFO) | |
1075 | pim_register_join(up); | |
1076 | } | |
1bf16443 | 1077 | } |
1078 | ||
f14248dd DS |
1079 | /* |
1080 | * On an RP, the PMBR value must be cleared when the | |
1081 | * Keepalive Timer expires | |
1bf16443 | 1082 | * KAT expiry indicates that flow is inactive. If the flow was created or |
1083 | * maintained by activity now is the time to deref it. | |
f14248dd | 1084 | */ |
d62a17ae | 1085 | static int pim_upstream_keep_alive_timer(struct thread *t) |
f14248dd | 1086 | { |
d62a17ae | 1087 | struct pim_upstream *up; |
8e5f97e3 | 1088 | struct pim_instance *pim; |
d62a17ae | 1089 | |
1090 | up = THREAD_ARG(t); | |
8e5f97e3 | 1091 | pim = up->channel_oil->pim; |
d62a17ae | 1092 | |
8e5f97e3 | 1093 | if (I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 1094 | pim_br_clear_pmbr(&up->sg); |
1095 | /* | |
1096 | * We need to do more here :) | |
1097 | * But this is the start. | |
1098 | */ | |
1099 | } | |
1100 | ||
1101 | /* source is no longer active - pull the SA from MSDP's cache */ | |
472ad383 | 1102 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 1103 | |
1104 | /* if entry was created because of activity we need to deref it */ | |
1105 | if (PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
8e5f97e3 | 1106 | pim_upstream_fhr_kat_expiry(pim, up); |
d62a17ae | 1107 | if (PIM_DEBUG_TRACE) |
1108 | zlog_debug("kat expired on %s; remove stream reference", | |
1109 | up->sg_str); | |
1110 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(up->flags); | |
8e5f97e3 | 1111 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
d62a17ae | 1112 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) { |
1113 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(up->flags); | |
8e5f97e3 | 1114 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
d62a17ae | 1115 | } |
1116 | ||
1117 | return 0; | |
f14248dd DS |
1118 | } |
1119 | ||
d62a17ae | 1120 | void pim_upstream_keep_alive_timer_start(struct pim_upstream *up, uint32_t time) |
f14248dd | 1121 | { |
d62a17ae | 1122 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { |
1123 | if (PIM_DEBUG_TRACE) | |
1124 | zlog_debug("kat start on %s with no stream reference", | |
1125 | up->sg_str); | |
1126 | } | |
1127 | THREAD_OFF(up->t_ka_timer); | |
1128 | thread_add_timer(master, pim_upstream_keep_alive_timer, up, time, | |
1129 | &up->t_ka_timer); | |
1130 | ||
1131 | /* any time keepalive is started against a SG we will have to | |
1132 | * re-evaluate our active source database */ | |
1133 | pim_msdp_sa_local_update(up); | |
1bf16443 | 1134 | } |
1135 | ||
1136 | /* MSDP on RP needs to know if a source is registerable to this RP */ | |
d62a17ae | 1137 | static int pim_upstream_msdp_reg_timer(struct thread *t) |
1bf16443 | 1138 | { |
472ad383 DS |
1139 | struct pim_upstream *up = THREAD_ARG(t); |
1140 | struct pim_instance *pim = up->channel_oil->pim; | |
1bf16443 | 1141 | |
d62a17ae | 1142 | /* source is no longer active - pull the SA from MSDP's cache */ |
472ad383 | 1143 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 1144 | return 1; |
1bf16443 | 1145 | } |
d62a17ae | 1146 | void pim_upstream_msdp_reg_timer_start(struct pim_upstream *up) |
1bf16443 | 1147 | { |
d62a17ae | 1148 | THREAD_OFF(up->t_msdp_reg_timer); |
1149 | thread_add_timer(master, pim_upstream_msdp_reg_timer, up, | |
1150 | PIM_MSDP_REG_RXED_PERIOD, &up->t_msdp_reg_timer); | |
1bf16443 | 1151 | |
d62a17ae | 1152 | pim_msdp_sa_local_update(up); |
f14248dd | 1153 | } |
cb40b272 DS |
1154 | |
1155 | /* | |
1156 | * 4.2.1 Last-Hop Switchover to the SPT | |
1157 | * | |
1158 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
1159 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
1160 | * router, it has the option of switching to receive the traffic on a | |
1161 | * shortest path tree (SPT). | |
1162 | * | |
1163 | * The decision for a router to switch to the SPT is controlled as | |
1164 | * follows: | |
1165 | * | |
1166 | * void | |
1167 | * CheckSwitchToSpt(S,G) { | |
1168 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
1169 | * (+) pim_include(S,G) != NULL ) | |
1170 | * AND SwitchToSptDesired(S,G) ) { | |
1171 | * # Note: Restarting the KAT will result in the SPT switch | |
1172 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1173 | * } | |
1174 | * } | |
1175 | * | |
1176 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
1177 | * defined. An "infinite threshold" policy can be implemented by making | |
1178 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
1179 | * first packet" policy can be implemented by making | |
1180 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
1181 | * received for the source and group. | |
1182 | */ | |
8e5f97e3 DS |
1183 | int pim_upstream_switch_to_spt_desired(struct pim_instance *pim, |
1184 | struct prefix_sg *sg) | |
cb40b272 | 1185 | { |
8e5f97e3 | 1186 | if (I_am_RP(pim, sg->grp)) |
d62a17ae | 1187 | return 1; |
a3b58b4a | 1188 | |
d62a17ae | 1189 | return 0; |
cb40b272 | 1190 | } |
d7259eac | 1191 | |
d62a17ae | 1192 | int pim_upstream_is_sg_rpt(struct pim_upstream *up) |
80d9c3a0 | 1193 | { |
d62a17ae | 1194 | struct listnode *chnode; |
1195 | struct pim_ifchannel *ch; | |
f21597f0 | 1196 | |
d62a17ae | 1197 | for (ALL_LIST_ELEMENTS_RO(up->ifchannels, chnode, ch)) { |
1198 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
1199 | return 1; | |
1200 | } | |
e43b8697 | 1201 | |
d62a17ae | 1202 | return 0; |
80d9c3a0 | 1203 | } |
3a66b17b DS |
1204 | /* |
1205 | * After receiving a packet set SPTbit: | |
1206 | * void | |
1207 | * Update_SPTbit(S,G,iif) { | |
1208 | * if ( iif == RPF_interface(S) | |
1209 | * AND JoinDesired(S,G) == TRUE | |
1210 | * AND ( DirectlyConnected(S) == TRUE | |
1211 | * OR RPF_interface(S) != RPF_interface(RP(G)) | |
1212 | * OR inherited_olist(S,G,rpt) == NULL | |
1213 | * OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1214 | * ( RPF'(S,G) != NULL ) ) | |
1215 | * OR ( I_Am_Assert_Loser(S,G,iif) ) { | |
1216 | * Set SPTbit(S,G) to TRUE | |
1217 | * } | |
1218 | * } | |
1219 | */ | |
d62a17ae | 1220 | void pim_upstream_set_sptbit(struct pim_upstream *up, |
1221 | struct interface *incoming) | |
3a66b17b | 1222 | { |
d62a17ae | 1223 | struct pim_upstream *starup = up->parent; |
1224 | ||
1225 | // iif == RPF_interfvace(S) | |
1226 | if (up->rpf.source_nexthop.interface != incoming) { | |
1227 | if (PIM_DEBUG_TRACE) | |
1228 | zlog_debug( | |
1229 | "%s: Incoming Interface: %s is different than RPF_interface(S) %s", | |
1230 | __PRETTY_FUNCTION__, incoming->name, | |
1231 | up->rpf.source_nexthop.interface->name); | |
1232 | return; | |
1233 | } | |
1234 | ||
1235 | // AND JoinDesired(S,G) == TRUE | |
1236 | // FIXME | |
1237 | ||
1238 | // DirectlyConnected(S) == TRUE | |
1239 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1240 | up->sg.src)) { | |
1241 | if (PIM_DEBUG_TRACE) | |
1242 | zlog_debug("%s: %s is directly connected to the source", | |
1243 | __PRETTY_FUNCTION__, up->sg_str); | |
1244 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1245 | return; | |
1246 | } | |
1247 | ||
1248 | // OR RPF_interface(S) != RPF_interface(RP(G)) | |
1249 | if (!starup | |
1250 | || up->rpf.source_nexthop | |
1251 | .interface != starup->rpf.source_nexthop.interface) { | |
1252 | if (PIM_DEBUG_TRACE) | |
1253 | zlog_debug( | |
1254 | "%s: %s RPF_interface(S) != RPF_interface(RP(G))", | |
1255 | __PRETTY_FUNCTION__, up->sg_str); | |
1256 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1257 | return; | |
1258 | } | |
1259 | ||
1260 | // OR inherited_olist(S,G,rpt) == NULL | |
1261 | if (pim_upstream_is_sg_rpt(up) | |
1262 | && pim_upstream_empty_inherited_olist(up)) { | |
1263 | if (PIM_DEBUG_TRACE) | |
1264 | zlog_debug("%s: %s OR inherited_olist(S,G,rpt) == NULL", | |
1265 | __PRETTY_FUNCTION__, up->sg_str); | |
1266 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1267 | return; | |
1268 | } | |
1269 | ||
1270 | // OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1271 | // ( RPF'(S,G) != NULL ) ) | |
1272 | if (up->parent && pim_rpf_is_same(&up->rpf, &up->parent->rpf)) { | |
1273 | if (PIM_DEBUG_TRACE) | |
1274 | zlog_debug("%s: %s RPF'(S,G) is the same as RPF'(*,G)", | |
1275 | __PRETTY_FUNCTION__, up->sg_str); | |
1276 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1277 | return; | |
1278 | } | |
1279 | ||
1280 | return; | |
3a66b17b | 1281 | } |
80d9c3a0 | 1282 | |
d62a17ae | 1283 | const char *pim_upstream_state2str(enum pim_upstream_state join_state) |
d7259eac | 1284 | { |
d62a17ae | 1285 | switch (join_state) { |
1286 | case PIM_UPSTREAM_NOTJOINED: | |
1287 | return "NotJoined"; | |
1288 | break; | |
1289 | case PIM_UPSTREAM_JOINED: | |
1290 | return "Joined"; | |
1291 | break; | |
1292 | } | |
1293 | return "Unknown"; | |
d7259eac | 1294 | } |
627ed2a3 | 1295 | |
d62a17ae | 1296 | const char *pim_reg_state2str(enum pim_reg_state reg_state, char *state_str) |
e0e127b0 | 1297 | { |
d62a17ae | 1298 | switch (reg_state) { |
1299 | case PIM_REG_NOINFO: | |
1300 | strcpy(state_str, "RegNoInfo"); | |
1301 | break; | |
1302 | case PIM_REG_JOIN: | |
1303 | strcpy(state_str, "RegJoined"); | |
1304 | break; | |
1305 | case PIM_REG_JOIN_PENDING: | |
1306 | strcpy(state_str, "RegJoinPend"); | |
1307 | break; | |
1308 | case PIM_REG_PRUNE: | |
1309 | strcpy(state_str, "RegPrune"); | |
1310 | break; | |
1311 | default: | |
1312 | strcpy(state_str, "RegUnknown"); | |
1313 | } | |
1314 | return state_str; | |
e0e127b0 | 1315 | } |
1316 | ||
d62a17ae | 1317 | static int pim_upstream_register_stop_timer(struct thread *t) |
627ed2a3 | 1318 | { |
d62a17ae | 1319 | struct pim_interface *pim_ifp; |
8e5f97e3 | 1320 | struct pim_instance *pim; |
d62a17ae | 1321 | struct pim_upstream *up; |
1322 | struct pim_rpf *rpg; | |
1323 | struct ip ip_hdr; | |
1324 | up = THREAD_ARG(t); | |
8e5f97e3 | 1325 | pim = up->channel_oil->pim; |
d62a17ae | 1326 | |
1327 | if (PIM_DEBUG_TRACE) { | |
1328 | char state_str[PIM_REG_STATE_STR_LEN]; | |
1329 | zlog_debug("%s: (S,G)=%s upstream register stop timer %s", | |
1330 | __PRETTY_FUNCTION__, up->sg_str, | |
1331 | pim_reg_state2str(up->reg_state, state_str)); | |
1332 | } | |
1333 | ||
1334 | switch (up->reg_state) { | |
1335 | case PIM_REG_JOIN_PENDING: | |
1336 | up->reg_state = PIM_REG_JOIN; | |
8e5f97e3 | 1337 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1338 | PIM_OIF_FLAG_PROTO_PIM); |
1339 | break; | |
1340 | case PIM_REG_JOIN: | |
1341 | break; | |
1342 | case PIM_REG_PRUNE: | |
1343 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
1344 | if (!pim_ifp) { | |
1345 | if (PIM_DEBUG_TRACE) | |
1346 | zlog_debug( | |
1347 | "%s: Interface: %s is not configured for pim", | |
1348 | __PRETTY_FUNCTION__, | |
1349 | up->rpf.source_nexthop.interface->name); | |
1350 | return 0; | |
1351 | } | |
1352 | up->reg_state = PIM_REG_JOIN_PENDING; | |
1353 | pim_upstream_start_register_stop_timer(up, 1); | |
1354 | ||
1355 | if (((up->channel_oil->cc.lastused / 100) | |
1356 | > PIM_KEEPALIVE_PERIOD) | |
d9c9a9ee | 1357 | && (I_am_RP(pim_ifp->pim, up->sg.grp))) { |
d62a17ae | 1358 | if (PIM_DEBUG_TRACE) |
1359 | zlog_debug( | |
1360 | "%s: Stop sending the register, because I am the RP and we haven't seen a packet in a while", | |
1361 | __PRETTY_FUNCTION__); | |
1362 | return 0; | |
1363 | } | |
d9c9a9ee | 1364 | rpg = RP(pim_ifp->pim, up->sg.grp); |
1e7a3a2a DS |
1365 | if (!rpg) { |
1366 | if (PIM_DEBUG_TRACE) | |
1367 | zlog_debug( | |
1368 | "%s: Cannot send register for %s no RPF to the RP", | |
1369 | __PRETTY_FUNCTION__, up->sg_str); | |
1370 | return 0; | |
1371 | } | |
d62a17ae | 1372 | memset(&ip_hdr, 0, sizeof(struct ip)); |
1373 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
1374 | ip_hdr.ip_hl = 5; | |
1375 | ip_hdr.ip_v = 4; | |
1376 | ip_hdr.ip_src = up->sg.src; | |
1377 | ip_hdr.ip_dst = up->sg.grp; | |
1378 | ip_hdr.ip_len = htons(20); | |
1379 | // checksum is broken | |
1380 | pim_register_send((uint8_t *)&ip_hdr, sizeof(struct ip), | |
1381 | pim_ifp->primary_address, rpg, 1, up); | |
1382 | break; | |
1383 | default: | |
1384 | break; | |
70e7fda8 | 1385 | } |
d62a17ae | 1386 | |
1387 | return 0; | |
627ed2a3 DS |
1388 | } |
1389 | ||
d62a17ae | 1390 | void pim_upstream_start_register_stop_timer(struct pim_upstream *up, |
1391 | int null_register) | |
627ed2a3 | 1392 | { |
d62a17ae | 1393 | uint32_t time; |
1394 | ||
1395 | THREAD_TIMER_OFF(up->t_rs_timer); | |
1396 | ||
1397 | if (!null_register) { | |
1398 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1399 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1400 | time = lower + (random() % (upper - lower + 1)) | |
1401 | - PIM_REGISTER_PROBE_PERIOD; | |
1402 | } else | |
1403 | time = PIM_REGISTER_PROBE_PERIOD; | |
1404 | ||
1405 | if (PIM_DEBUG_TRACE) { | |
1406 | zlog_debug( | |
1407 | "%s: (S,G)=%s Starting upstream register stop timer %d", | |
1408 | __PRETTY_FUNCTION__, up->sg_str, time); | |
1409 | } | |
1410 | thread_add_timer(master, pim_upstream_register_stop_timer, up, time, | |
1411 | &up->t_rs_timer); | |
627ed2a3 | 1412 | } |
4fdc8f36 | 1413 | |
9b29ea95 DS |
1414 | int pim_upstream_inherited_olist_decide(struct pim_instance *pim, |
1415 | struct pim_upstream *up) | |
4fdc8f36 | 1416 | { |
d62a17ae | 1417 | struct interface *ifp; |
1418 | struct pim_interface *pim_ifp = NULL; | |
1419 | struct pim_ifchannel *ch, *starch; | |
1420 | struct listnode *node; | |
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 | |
9b29ea95 | 1435 | for (ALL_LIST_ELEMENTS_RO(vrf_iflist(pim->vrf_id), node, 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 | |
d62a17ae | 1530 | static 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 | { |
9b29ea95 DS |
1539 | if (pim->upstream_list) |
1540 | list_delete(pim->upstream_list); | |
1541 | pim->upstream_list = NULL; | |
0f588989 | 1542 | |
9b29ea95 DS |
1543 | if (pim->upstream_hash) |
1544 | hash_free(pim->upstream_hash); | |
1545 | pim->upstream_hash = NULL; | |
0f588989 DS |
1546 | } |
1547 | ||
d62a17ae | 1548 | static int pim_upstream_equal(const void *arg1, const void *arg2) |
0f588989 | 1549 | { |
d62a17ae | 1550 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
1551 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
0f588989 | 1552 | |
d62a17ae | 1553 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) |
1554 | && (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
1555 | return 1; | |
0f588989 | 1556 | |
d62a17ae | 1557 | return 0; |
0f588989 DS |
1558 | } |
1559 | ||
1bf16443 | 1560 | /* rfc4601:section-4.2:"Data Packet Forwarding Rules" defines |
1561 | * the cases where kat has to be restarted on rxing traffic - | |
1562 | * | |
1563 | * if( DirectlyConnected(S) == TRUE AND iif == RPF_interface(S) ) { | |
1564 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1565 | * # Note: a register state transition or UpstreamJPState(S,G) | |
1566 | * # transition may happen as a result of restarting | |
1567 | * # KeepaliveTimer, and must be dealt with here. | |
1568 | * } | |
1569 | * if( iif == RPF_interface(S) AND UpstreamJPState(S,G) == Joined AND | |
1570 | * inherited_olist(S,G) != NULL ) { | |
1571 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1572 | * } | |
1573 | */ | |
1574 | static bool pim_upstream_kat_start_ok(struct pim_upstream *up) | |
1575 | { | |
8e5f97e3 DS |
1576 | struct pim_instance *pim = up->channel_oil->pim; |
1577 | ||
d62a17ae | 1578 | /* "iif == RPF_interface(S)" check has to be done by the kernel or hw |
1579 | * so we will skip that here */ | |
1580 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1581 | up->sg.src)) { | |
1582 | return true; | |
1583 | } | |
1584 | ||
1585 | if ((up->join_state == PIM_UPSTREAM_JOINED) | |
1586 | && !pim_upstream_empty_inherited_olist(up)) { | |
1587 | /* XXX: I have added this RP check just for 3.2 and it's a | |
1588 | * digression from | |
1589 | * what rfc-4601 says. Till now we were only running KAT on FHR | |
1590 | * and RP and | |
1591 | * there is some angst around making the change to run it all | |
1592 | * routers that | |
1593 | * maintain the (S, G) state. This is tracked via CM-13601 and | |
1594 | * MUST be | |
1595 | * removed to handle spt turn-arounds correctly in a 3-tier clos | |
1596 | */ | |
8e5f97e3 | 1597 | if (I_am_RP(pim, up->sg.grp)) |
d62a17ae | 1598 | return true; |
1599 | } | |
1600 | ||
1601 | return false; | |
1bf16443 | 1602 | } |
1603 | ||
9c5e4d62 DS |
1604 | /* |
1605 | * Code to check and see if we've received packets on a S,G mroute | |
1606 | * and if so to set the SPT bit appropriately | |
1607 | */ | |
d62a17ae | 1608 | static void pim_upstream_sg_running(void *arg) |
9c5e4d62 | 1609 | { |
d62a17ae | 1610 | struct pim_upstream *up = (struct pim_upstream *)arg; |
8e5f97e3 | 1611 | struct pim_instance *pim = up->channel_oil->pim; |
d62a17ae | 1612 | |
1613 | // No packet can have arrived here if this is the case | |
8e5f97e3 | 1614 | if (!up->channel_oil->installed) { |
d62a17ae | 1615 | if (PIM_DEBUG_TRACE) |
1616 | zlog_debug("%s: %s is not installed in mroute", | |
1617 | __PRETTY_FUNCTION__, up->sg_str); | |
1618 | return; | |
1619 | } | |
1620 | ||
1621 | /* | |
1622 | * This is a bit of a hack | |
1623 | * We've noted that we should rescan but | |
1624 | * we've missed the window for doing so in | |
1625 | * pim_zebra.c for some reason. I am | |
1626 | * only doing this at this point in time | |
1627 | * to get us up and working for the moment | |
1628 | */ | |
1629 | if (up->channel_oil->oil_inherited_rescan) { | |
1630 | if (PIM_DEBUG_TRACE) | |
1631 | zlog_debug( | |
1632 | "%s: Handling unscanned inherited_olist for %s", | |
1633 | __PRETTY_FUNCTION__, up->sg_str); | |
8e5f97e3 | 1634 | pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 1635 | up->channel_oil->oil_inherited_rescan = 0; |
1636 | } | |
1637 | pim_mroute_update_counters(up->channel_oil); | |
1638 | ||
1639 | // Have we seen packets? | |
1640 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) | |
1641 | && (up->channel_oil->cc.lastused / 100 > 30)) { | |
1642 | if (PIM_DEBUG_TRACE) { | |
1643 | zlog_debug( | |
1644 | "%s: %s old packet count is equal or lastused is greater than 30, (%ld,%ld,%lld)", | |
1645 | __PRETTY_FUNCTION__, up->sg_str, | |
1646 | up->channel_oil->cc.oldpktcnt, | |
1647 | up->channel_oil->cc.pktcnt, | |
1648 | up->channel_oil->cc.lastused / 100); | |
1649 | } | |
1650 | return; | |
e43b8697 | 1651 | } |
d62a17ae | 1652 | |
1653 | if (pim_upstream_kat_start_ok(up)) { | |
1654 | /* Add a source reference to the stream if | |
1655 | * one doesn't already exist */ | |
1656 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
1657 | if (PIM_DEBUG_TRACE) | |
1658 | zlog_debug( | |
1659 | "source reference created on kat restart %s", | |
1660 | up->sg_str); | |
1661 | ||
1662 | pim_upstream_ref(up, PIM_UPSTREAM_FLAG_MASK_SRC_STREAM, | |
1663 | __PRETTY_FUNCTION__); | |
1664 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); | |
1665 | pim_upstream_fhr_kat_start(up); | |
1666 | } | |
1667 | pim_upstream_keep_alive_timer_start(up, qpim_keep_alive_time); | |
1668 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) | |
1669 | pim_upstream_keep_alive_timer_start(up, qpim_keep_alive_time); | |
1670 | ||
1671 | if (up->sptbit != PIM_UPSTREAM_SPTBIT_TRUE) { | |
1672 | pim_upstream_set_sptbit(up, up->rpf.source_nexthop.interface); | |
850a9f99 | 1673 | } |
d62a17ae | 1674 | return; |
9c5e4d62 DS |
1675 | } |
1676 | ||
9b29ea95 | 1677 | void pim_upstream_add_lhr_star_pimreg(struct pim_instance *pim) |
a7b2b1e2 | 1678 | { |
d62a17ae | 1679 | struct pim_upstream *up; |
1680 | struct listnode *node; | |
a7b2b1e2 | 1681 | |
9b29ea95 | 1682 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { |
d62a17ae | 1683 | if (up->sg.src.s_addr != INADDR_ANY) |
1684 | continue; | |
a7b2b1e2 | 1685 | |
d62a17ae | 1686 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) |
1687 | continue; | |
a7b2b1e2 | 1688 | |
9b29ea95 | 1689 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1690 | PIM_OIF_FLAG_PROTO_IGMP); |
1691 | } | |
a7b2b1e2 DS |
1692 | } |
1693 | ||
9b29ea95 DS |
1694 | void pim_upstream_spt_prefix_list_update(struct pim_instance *pim, |
1695 | struct prefix_list *pl) | |
df94f9a9 | 1696 | { |
d62a17ae | 1697 | const char *pname = prefix_list_name(pl); |
df94f9a9 | 1698 | |
9b29ea95 DS |
1699 | if (pim->spt.plist && strcmp(pim->spt.plist, pname) == 0) { |
1700 | pim_upstream_remove_lhr_star_pimreg(pim, pname); | |
d62a17ae | 1701 | } |
df94f9a9 DS |
1702 | } |
1703 | ||
1704 | /* | |
1705 | * nlist -> The new prefix list | |
1706 | * | |
1707 | * Per Group Application of pimreg to the OIL | |
1708 | * If the prefix list tells us DENY then | |
1709 | * we need to Switchover to SPT immediate | |
1710 | * so add the pimreg. | |
1711 | * If the prefix list tells us to ACCEPT than | |
1712 | * we need to Never do the SPT so remove | |
1713 | * the interface | |
1714 | * | |
1715 | */ | |
9b29ea95 DS |
1716 | void pim_upstream_remove_lhr_star_pimreg(struct pim_instance *pim, |
1717 | const char *nlist) | |
a7b2b1e2 | 1718 | { |
d62a17ae | 1719 | struct pim_upstream *up; |
1720 | struct listnode *node; | |
1721 | struct prefix_list *np; | |
1722 | struct prefix g; | |
1723 | enum prefix_list_type apply_new; | |
1724 | ||
1725 | np = prefix_list_lookup(AFI_IP, nlist); | |
1726 | ||
1727 | g.family = AF_INET; | |
1728 | g.prefixlen = IPV4_MAX_PREFIXLEN; | |
1729 | ||
9b29ea95 | 1730 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { |
d62a17ae | 1731 | if (up->sg.src.s_addr != INADDR_ANY) |
1732 | continue; | |
1733 | ||
1734 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) | |
1735 | continue; | |
1736 | ||
1737 | if (!nlist) { | |
9b29ea95 | 1738 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1739 | PIM_OIF_FLAG_PROTO_IGMP); |
1740 | continue; | |
1741 | } | |
1742 | g.u.prefix4 = up->sg.grp; | |
1743 | apply_new = prefix_list_apply(np, &g); | |
1744 | if (apply_new == PREFIX_DENY) | |
9b29ea95 | 1745 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1746 | PIM_OIF_FLAG_PROTO_IGMP); |
1747 | else | |
9b29ea95 | 1748 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1749 | PIM_OIF_FLAG_PROTO_IGMP); |
1750 | } | |
a7b2b1e2 DS |
1751 | } |
1752 | ||
9b29ea95 | 1753 | void pim_upstream_init(struct pim_instance *pim) |
0f588989 | 1754 | { |
9b29ea95 | 1755 | pim->upstream_sg_wheel = |
d62a17ae | 1756 | wheel_init(master, 31000, 100, pim_upstream_hash_key, |
1757 | pim_upstream_sg_running); | |
9b29ea95 DS |
1758 | pim->upstream_hash = hash_create_size(8192, pim_upstream_hash_key, |
1759 | pim_upstream_equal, NULL); | |
d62a17ae | 1760 | |
9b29ea95 DS |
1761 | pim->upstream_list = list_new(); |
1762 | pim->upstream_list->del = (void (*)(void *))pim_upstream_free; | |
1763 | pim->upstream_list->cmp = pim_upstream_compare; | |
0f588989 | 1764 | } |