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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 | |
170 | --up->ref_count; | |
171 | ||
172 | if (up->ref_count >= 1) | |
173 | return up; | |
174 | ||
175 | THREAD_OFF(up->t_ka_timer); | |
176 | THREAD_OFF(up->t_rs_timer); | |
177 | THREAD_OFF(up->t_msdp_reg_timer); | |
178 | ||
179 | if (up->join_state == PIM_UPSTREAM_JOINED) { | |
180 | pim_jp_agg_single_upstream_send(&up->rpf, up, 0); | |
181 | ||
182 | if (up->sg.src.s_addr == INADDR_ANY) { | |
183 | /* if a (*, G) entry in the joined state is being | |
184 | * deleted we | |
185 | * need to notify MSDP */ | |
186 | notify_msdp = true; | |
187 | } | |
188 | } | |
189 | ||
190 | join_timer_stop(up); | |
191 | pim_jp_agg_upstream_verification(up, false); | |
192 | up->rpf.source_nexthop.interface = NULL; | |
193 | ||
194 | if (up->sg.src.s_addr != INADDR_ANY) { | |
9b29ea95 | 195 | wheel_remove_item(pim->upstream_sg_wheel, up); |
d62a17ae | 196 | notify_msdp = true; |
197 | } | |
198 | ||
d62a17ae | 199 | pim_mroute_del(up->channel_oil, __PRETTY_FUNCTION__); |
200 | upstream_channel_oil_detach(up); | |
201 | ||
7692c5ae DS |
202 | for (ALL_LIST_ELEMENTS(up->ifchannels, node, nnode, ch)) |
203 | pim_ifchannel_delete(ch); | |
affe9e99 | 204 | list_delete_and_null(&up->ifchannels); |
d62a17ae | 205 | |
7692c5ae DS |
206 | pim_upstream_remove_children(pim, up); |
207 | if (up->sources) | |
208 | list_delete_and_null(&up->sources); | |
209 | ||
d62a17ae | 210 | if (up->parent && up->parent->sources) |
211 | listnode_delete(up->parent->sources, up); | |
212 | up->parent = NULL; | |
213 | ||
9b29ea95 DS |
214 | listnode_delete(pim->upstream_list, up); |
215 | hash_release(pim->upstream_hash, up); | |
d62a17ae | 216 | |
217 | if (notify_msdp) { | |
472ad383 | 218 | pim_msdp_up_del(pim, &up->sg); |
d62a17ae | 219 | } |
220 | ||
221 | /* Deregister addr with Zebra NHT */ | |
222 | nht_p.family = AF_INET; | |
223 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
224 | nht_p.u.prefix4 = up->upstream_addr; | |
225 | if (PIM_DEBUG_TRACE) { | |
226 | char buf[PREFIX2STR_BUFFER]; | |
227 | prefix2str(&nht_p, buf, sizeof(buf)); | |
228 | zlog_debug("%s: Deregister upstream %s addr %s with Zebra NHT", | |
229 | __PRETTY_FUNCTION__, up->sg_str, buf); | |
230 | } | |
9b29ea95 | 231 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL); |
d62a17ae | 232 | |
172e45dc | 233 | XFREE(MTYPE_PIM_UPSTREAM, up); |
d62a17ae | 234 | |
235 | return NULL; | |
12e41d03 DL |
236 | } |
237 | ||
d62a17ae | 238 | void pim_upstream_send_join(struct pim_upstream *up) |
12e41d03 | 239 | { |
d62a17ae | 240 | if (PIM_DEBUG_TRACE) { |
241 | char rpf_str[PREFIX_STRLEN]; | |
242 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, | |
243 | sizeof(rpf_str)); | |
244 | zlog_debug("%s: RPF'%s=%s(%s) for Interface %s", | |
245 | __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
246 | pim_upstream_state2str(up->join_state), | |
247 | up->rpf.source_nexthop.interface->name); | |
248 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
249 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", | |
250 | __PRETTY_FUNCTION__, up->sg_str, rpf_str); | |
251 | /* warning only */ | |
252 | } | |
253 | } | |
254 | ||
255 | /* send Join(S,G) to the current upstream neighbor */ | |
256 | pim_jp_agg_single_upstream_send(&up->rpf, up, 1 /* join */); | |
12e41d03 DL |
257 | } |
258 | ||
259 | static int on_join_timer(struct thread *t) | |
260 | { | |
d62a17ae | 261 | struct pim_upstream *up; |
12e41d03 | 262 | |
d62a17ae | 263 | up = THREAD_ARG(t); |
12e41d03 | 264 | |
d62a17ae | 265 | /* |
266 | * In the case of a HFR we will not ahve anyone to send this to. | |
267 | */ | |
268 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) | |
269 | return 0; | |
bb6e291f | 270 | |
d62a17ae | 271 | /* |
272 | * Don't send the join if the outgoing interface is a loopback | |
273 | * But since this might change leave the join timer running | |
274 | */ | |
275 | if (up->rpf.source_nexthop | |
276 | .interface && !if_is_loopback(up->rpf.source_nexthop.interface)) | |
277 | pim_upstream_send_join(up); | |
12e41d03 | 278 | |
d62a17ae | 279 | join_timer_start(up); |
12e41d03 | 280 | |
d62a17ae | 281 | return 0; |
12e41d03 DL |
282 | } |
283 | ||
982bff89 | 284 | static void join_timer_stop(struct pim_upstream *up) |
12e41d03 | 285 | { |
d62a17ae | 286 | struct pim_neighbor *nbr; |
982bff89 | 287 | |
d62a17ae | 288 | THREAD_OFF(up->t_join_timer); |
7eb90689 | 289 | |
d62a17ae | 290 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, |
291 | up->rpf.rpf_addr.u.prefix4); | |
982bff89 | 292 | |
d62a17ae | 293 | if (nbr) |
294 | pim_jp_agg_remove_group(nbr->upstream_jp_agg, up); | |
982bff89 | 295 | |
d62a17ae | 296 | pim_jp_agg_upstream_verification(up, false); |
982bff89 DS |
297 | } |
298 | ||
d62a17ae | 299 | void join_timer_start(struct pim_upstream *up) |
982bff89 | 300 | { |
d62a17ae | 301 | struct pim_neighbor *nbr = NULL; |
302 | ||
303 | if (up->rpf.source_nexthop.interface) { | |
304 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, | |
305 | up->rpf.rpf_addr.u.prefix4); | |
306 | ||
307 | if (PIM_DEBUG_PIM_EVENTS) { | |
308 | zlog_debug( | |
309 | "%s: starting %d sec timer for upstream (S,G)=%s", | |
310 | __PRETTY_FUNCTION__, qpim_t_periodic, | |
311 | up->sg_str); | |
312 | } | |
313 | } | |
314 | ||
315 | if (nbr) | |
316 | pim_jp_agg_add_group(nbr->upstream_jp_agg, up, 1); | |
317 | else { | |
318 | THREAD_OFF(up->t_join_timer); | |
319 | thread_add_timer(master, on_join_timer, up, qpim_t_periodic, | |
320 | &up->t_join_timer); | |
321 | } | |
322 | pim_jp_agg_upstream_verification(up, true); | |
12e41d03 DL |
323 | } |
324 | ||
982bff89 DS |
325 | /* |
326 | * This is only called when we are switching the upstream | |
327 | * J/P from one neighbor to another | |
328 | * | |
329 | * As such we need to remove from the old list and | |
330 | * add to the new list. | |
331 | */ | |
d62a17ae | 332 | void pim_upstream_join_timer_restart(struct pim_upstream *up, |
333 | struct pim_rpf *old) | |
12e41d03 | 334 | { |
d62a17ae | 335 | // THREAD_OFF(up->t_join_timer); |
336 | join_timer_start(up); | |
12e41d03 DL |
337 | } |
338 | ||
339 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
340 | int interval_msec) | |
341 | { | |
d62a17ae | 342 | if (PIM_DEBUG_PIM_EVENTS) { |
343 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", | |
344 | __PRETTY_FUNCTION__, interval_msec, up->sg_str); | |
345 | } | |
346 | ||
347 | THREAD_OFF(up->t_join_timer); | |
348 | thread_add_timer_msec(master, on_join_timer, up, interval_msec, | |
349 | &up->t_join_timer); | |
12e41d03 DL |
350 | } |
351 | ||
352 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
d62a17ae | 353 | struct in_addr rpf_addr, int holdtime) |
12e41d03 | 354 | { |
d62a17ae | 355 | long t_joinsuppress_msec; |
356 | long join_timer_remain_msec; | |
357 | ||
358 | t_joinsuppress_msec = | |
359 | MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
360 | 1000 * holdtime); | |
361 | ||
362 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
363 | ||
364 | if (PIM_DEBUG_TRACE) { | |
365 | char rpf_str[INET_ADDRSTRLEN]; | |
366 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); | |
367 | zlog_debug( | |
368 | "%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", | |
369 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
370 | join_timer_remain_msec, t_joinsuppress_msec); | |
371 | } | |
372 | ||
373 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
374 | if (PIM_DEBUG_TRACE) { | |
375 | zlog_debug( | |
376 | "%s %s: suppressing Join(S,G)=%s for %ld msec", | |
377 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, | |
378 | t_joinsuppress_msec); | |
379 | } | |
380 | ||
381 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
382 | } | |
12e41d03 DL |
383 | } |
384 | ||
385 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
d62a17ae | 386 | struct pim_upstream *up) |
12e41d03 | 387 | { |
d62a17ae | 388 | long join_timer_remain_msec; |
389 | int t_override_msec; | |
390 | ||
391 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
392 | t_override_msec = | |
393 | pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
394 | ||
395 | if (PIM_DEBUG_TRACE) { | |
396 | char rpf_str[INET_ADDRSTRLEN]; | |
397 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr.u.prefix4, rpf_str, | |
398 | sizeof(rpf_str)); | |
399 | zlog_debug( | |
400 | "%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", | |
401 | debug_label, up->sg_str, rpf_str, | |
402 | join_timer_remain_msec, t_override_msec); | |
403 | } | |
404 | ||
405 | if (join_timer_remain_msec > t_override_msec) { | |
406 | if (PIM_DEBUG_TRACE) { | |
407 | zlog_debug( | |
408 | "%s: decreasing (S,G)=%s join timer to t_override=%d msec", | |
409 | debug_label, up->sg_str, t_override_msec); | |
410 | } | |
411 | ||
412 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
413 | } | |
12e41d03 DL |
414 | } |
415 | ||
416 | static void forward_on(struct pim_upstream *up) | |
417 | { | |
d62a17ae | 418 | struct listnode *chnode; |
419 | struct listnode *chnextnode; | |
420 | struct pim_ifchannel *ch = NULL; | |
12e41d03 | 421 | |
d62a17ae | 422 | /* scan (S,G) state */ |
423 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
424 | if (pim_macro_chisin_oiflist(ch)) | |
425 | pim_forward_start(ch); | |
12e41d03 | 426 | |
d62a17ae | 427 | } /* scan iface channel list */ |
12e41d03 DL |
428 | } |
429 | ||
430 | static void forward_off(struct pim_upstream *up) | |
431 | { | |
d62a17ae | 432 | struct listnode *chnode; |
433 | struct listnode *chnextnode; | |
434 | struct pim_ifchannel *ch; | |
12e41d03 | 435 | |
d62a17ae | 436 | /* scan per-interface (S,G) state */ |
437 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
12e41d03 | 438 | |
aabb9a2f | 439 | pim_forward_stop(ch, false); |
12e41d03 | 440 | |
d62a17ae | 441 | } /* scan iface channel list */ |
12e41d03 DL |
442 | } |
443 | ||
d62a17ae | 444 | static int pim_upstream_could_register(struct pim_upstream *up) |
bb6e291f | 445 | { |
d62a17ae | 446 | struct pim_interface *pim_ifp = NULL; |
447 | ||
448 | if (up->rpf.source_nexthop.interface) | |
449 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
450 | else { | |
451 | if (PIM_DEBUG_TRACE) | |
452 | zlog_debug("%s: up %s RPF is not present", | |
453 | __PRETTY_FUNCTION__, up->sg_str); | |
454 | } | |
bb6e291f | 455 | |
d62a17ae | 456 | if (pim_ifp && PIM_I_am_DR(pim_ifp) |
457 | && pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
458 | up->sg.src)) | |
459 | return 1; | |
bb6e291f | 460 | |
d62a17ae | 461 | return 0; |
bb6e291f DS |
462 | } |
463 | ||
15a5dafe | 464 | /* Source registration is supressed for SSM groups. When the SSM range changes |
465 | * we re-revaluate register setup for existing upstream entries */ | |
9b29ea95 | 466 | void pim_upstream_register_reevaluate(struct pim_instance *pim) |
15a5dafe | 467 | { |
d62a17ae | 468 | struct listnode *upnode; |
469 | struct pim_upstream *up; | |
470 | ||
9b29ea95 | 471 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
d62a17ae | 472 | /* If FHR is set CouldRegister is True. Also check if the flow |
473 | * is actually active; if it is not kat setup will trigger | |
474 | * source | |
475 | * registration whenever the flow becomes active. */ | |
476 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) || !up->t_ka_timer) | |
477 | continue; | |
478 | ||
6f439a70 | 479 | if (pim_is_grp_ssm(pim, up->sg.grp)) { |
d62a17ae | 480 | /* clear the register state for SSM groups */ |
481 | if (up->reg_state != PIM_REG_NOINFO) { | |
482 | if (PIM_DEBUG_PIM_EVENTS) | |
483 | zlog_debug( | |
484 | "Clear register for %s as G is now SSM", | |
485 | up->sg_str); | |
486 | /* remove regiface from the OIL if it is there*/ | |
487 | pim_channel_del_oif(up->channel_oil, | |
9b29ea95 | 488 | pim->regiface, |
d62a17ae | 489 | PIM_OIF_FLAG_PROTO_PIM); |
490 | up->reg_state = PIM_REG_NOINFO; | |
491 | } | |
492 | } else { | |
493 | /* register ASM sources with the RP */ | |
494 | if (up->reg_state == PIM_REG_NOINFO) { | |
495 | if (PIM_DEBUG_PIM_EVENTS) | |
496 | zlog_debug( | |
497 | "Register %s as G is now ASM", | |
498 | up->sg_str); | |
499 | pim_channel_add_oif(up->channel_oil, | |
9b29ea95 | 500 | pim->regiface, |
d62a17ae | 501 | PIM_OIF_FLAG_PROTO_PIM); |
502 | up->reg_state = PIM_REG_JOIN; | |
503 | } | |
504 | } | |
505 | } | |
15a5dafe | 506 | } |
507 | ||
1eca8576 | 508 | void pim_upstream_switch(struct pim_instance *pim, struct pim_upstream *up, |
d62a17ae | 509 | enum pim_upstream_state new_state) |
12e41d03 | 510 | { |
d62a17ae | 511 | enum pim_upstream_state old_state = up->join_state; |
512 | ||
513 | if (PIM_DEBUG_PIM_EVENTS) { | |
514 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", | |
515 | __PRETTY_FUNCTION__, up->sg_str, | |
516 | pim_upstream_state2str(up->join_state), | |
517 | pim_upstream_state2str(new_state)); | |
518 | } | |
519 | ||
520 | up->join_state = new_state; | |
521 | if (old_state != new_state) | |
522 | up->state_transition = pim_time_monotonic_sec(); | |
523 | ||
524 | pim_upstream_update_assert_tracking_desired(up); | |
525 | ||
526 | if (new_state == PIM_UPSTREAM_JOINED) { | |
527 | if (old_state != PIM_UPSTREAM_JOINED) { | |
528 | int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags); | |
529 | forward_on(up); | |
1eca8576 | 530 | pim_msdp_up_join_state_changed(pim, up); |
d62a17ae | 531 | if (pim_upstream_could_register(up)) { |
532 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
533 | if (!old_fhr | |
534 | && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM( | |
535 | up->flags)) { | |
536 | pim_upstream_keep_alive_timer_start( | |
19b807ca | 537 | up, pim->keep_alive_time); |
d62a17ae | 538 | pim_register_join(up); |
539 | } | |
540 | } else { | |
541 | pim_upstream_send_join(up); | |
542 | join_timer_start(up); | |
543 | } | |
544 | } else { | |
545 | forward_on(up); | |
546 | } | |
547 | } else { | |
548 | ||
549 | forward_off(up); | |
550 | if (old_state == PIM_UPSTREAM_JOINED) | |
1eca8576 | 551 | pim_msdp_up_join_state_changed(pim, up); |
d62a17ae | 552 | |
553 | /* IHR, Trigger SGRpt on *,G IIF to prune S,G from RPT towards | |
554 | RP. | |
555 | If I am RP for G then send S,G prune to its IIF. */ | |
556 | if (pim_upstream_is_sg_rpt(up) && up->parent | |
1eca8576 | 557 | && !I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 558 | if (PIM_DEBUG_PIM_TRACE_DETAIL) |
559 | zlog_debug( | |
560 | "%s: *,G IIF %s S,G IIF %s ", | |
561 | __PRETTY_FUNCTION__, | |
562 | up->parent->rpf.source_nexthop | |
563 | .interface->name, | |
564 | up->rpf.source_nexthop.interface->name); | |
565 | pim_jp_agg_single_upstream_send(&up->parent->rpf, | |
566 | up->parent, | |
567 | 1 /* (W,G) Join */); | |
568 | } else | |
569 | pim_jp_agg_single_upstream_send(&up->rpf, up, | |
570 | 0 /* prune */); | |
571 | join_timer_stop(up); | |
572 | } | |
12e41d03 DL |
573 | } |
574 | ||
d62a17ae | 575 | int pim_upstream_compare(void *arg1, void *arg2) |
03417ccd | 576 | { |
d62a17ae | 577 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
578 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
03417ccd | 579 | |
d62a17ae | 580 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) |
581 | return -1; | |
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.src.s_addr) < ntohl(up2->sg.src.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 | return 0; |
03417ccd DS |
593 | } |
594 | ||
2002dcdb DS |
595 | static struct pim_upstream *pim_upstream_new(struct pim_instance *pim, |
596 | struct prefix_sg *sg, | |
597 | struct interface *incoming, | |
0885a9f1 DS |
598 | int flags, |
599 | struct pim_ifchannel *ch) | |
12e41d03 | 600 | { |
d62a17ae | 601 | enum pim_rpf_result rpf_result; |
602 | struct pim_interface *pim_ifp; | |
603 | struct pim_upstream *up; | |
604 | ||
605 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); | |
d62a17ae | 606 | |
607 | up->sg = *sg; | |
608 | pim_str_sg_set(sg, up->sg_str); | |
0885a9f1 DS |
609 | if (ch) |
610 | ch->upstream = up; | |
611 | ||
9b29ea95 | 612 | up = hash_get(pim->upstream_hash, up, hash_alloc_intern); |
d9c9a9ee DS |
613 | if (!pim_rp_set_upstream_addr(pim, &up->upstream_addr, sg->src, |
614 | sg->grp)) { | |
d62a17ae | 615 | if (PIM_DEBUG_TRACE) |
616 | zlog_debug("%s: Received a (*,G) with no RP configured", | |
617 | __PRETTY_FUNCTION__); | |
618 | ||
9b29ea95 | 619 | hash_release(pim->upstream_hash, up); |
d62a17ae | 620 | XFREE(MTYPE_PIM_UPSTREAM, up); |
621 | return NULL; | |
622 | } | |
623 | ||
9b29ea95 | 624 | up->parent = pim_upstream_find_parent(pim, up); |
d62a17ae | 625 | if (up->sg.src.s_addr == INADDR_ANY) { |
626 | up->sources = list_new(); | |
627 | up->sources->cmp = pim_upstream_compare; | |
628 | } else | |
629 | up->sources = NULL; | |
630 | ||
9b29ea95 | 631 | pim_upstream_find_new_children(pim, up); |
d62a17ae | 632 | up->flags = flags; |
633 | up->ref_count = 1; | |
634 | up->t_join_timer = NULL; | |
635 | up->t_ka_timer = NULL; | |
636 | up->t_rs_timer = NULL; | |
637 | up->t_msdp_reg_timer = NULL; | |
638 | up->join_state = PIM_UPSTREAM_NOTJOINED; | |
639 | up->reg_state = PIM_REG_NOINFO; | |
640 | up->state_transition = pim_time_monotonic_sec(); | |
641 | up->channel_oil = NULL; | |
642 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; | |
643 | ||
644 | up->rpf.source_nexthop.interface = NULL; | |
645 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; | |
646 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = | |
647 | PIM_NET_INADDR_ANY; | |
648 | up->rpf.source_nexthop.mrib_metric_preference = | |
649 | qpim_infinite_assert_metric.metric_preference; | |
650 | up->rpf.source_nexthop.mrib_route_metric = | |
651 | qpim_infinite_assert_metric.route_metric; | |
652 | up->rpf.rpf_addr.family = AF_INET; | |
653 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
654 | ||
655 | up->ifchannels = list_new(); | |
656 | up->ifchannels->cmp = (int (*)(void *, void *))pim_ifchannel_compare; | |
657 | ||
658 | if (up->sg.src.s_addr != INADDR_ANY) | |
9b29ea95 | 659 | wheel_add_item(pim->upstream_sg_wheel, up); |
d62a17ae | 660 | |
2002dcdb | 661 | rpf_result = pim_rpf_update(pim, up, NULL, 1); |
d62a17ae | 662 | if (rpf_result == PIM_RPF_FAILURE) { |
663 | struct prefix nht_p; | |
664 | ||
665 | if (PIM_DEBUG_TRACE) | |
666 | zlog_debug( | |
667 | "%s: Attempting to create upstream(%s), Unable to RPF for source", | |
668 | __PRETTY_FUNCTION__, up->sg_str); | |
669 | ||
670 | nht_p.family = AF_INET; | |
671 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
672 | nht_p.u.prefix4 = up->upstream_addr; | |
2002dcdb | 673 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL); |
d62a17ae | 674 | |
675 | if (up->parent) { | |
676 | listnode_delete(up->parent->sources, up); | |
677 | up->parent = NULL; | |
678 | } | |
679 | ||
680 | if (up->sg.src.s_addr != INADDR_ANY) | |
9b29ea95 | 681 | wheel_remove_item(pim->upstream_sg_wheel, up); |
d62a17ae | 682 | |
9b29ea95 | 683 | pim_upstream_remove_children(pim, up); |
d62a17ae | 684 | if (up->sources) |
affe9e99 | 685 | list_delete_and_null(&up->sources); |
d62a17ae | 686 | |
affe9e99 | 687 | list_delete_and_null(&up->ifchannels); |
a5d4c69d | 688 | |
9b29ea95 | 689 | hash_release(pim->upstream_hash, up); |
d62a17ae | 690 | XFREE(MTYPE_PIM_UPSTREAM, up); |
691 | return NULL; | |
692 | } | |
693 | ||
694 | if (up->rpf.source_nexthop.interface) { | |
695 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
696 | if (pim_ifp) | |
697 | up->channel_oil = pim_channel_oil_add( | |
611925dc | 698 | pim, &up->sg, pim_ifp->mroute_vif_index); |
d62a17ae | 699 | } |
9b29ea95 | 700 | listnode_add_sort(pim->upstream_list, up); |
d62a17ae | 701 | |
702 | if (PIM_DEBUG_TRACE) { | |
703 | zlog_debug( | |
704 | "%s: Created Upstream %s upstream_addr %s ref count %d increment", | |
705 | __PRETTY_FUNCTION__, up->sg_str, | |
706 | inet_ntoa(up->upstream_addr), up->ref_count); | |
707 | } | |
708 | ||
709 | return up; | |
12e41d03 DL |
710 | } |
711 | ||
9b29ea95 DS |
712 | struct pim_upstream *pim_upstream_find(struct pim_instance *pim, |
713 | struct prefix_sg *sg) | |
12e41d03 | 714 | { |
d62a17ae | 715 | struct pim_upstream lookup; |
716 | struct pim_upstream *up = NULL; | |
12e41d03 | 717 | |
d62a17ae | 718 | lookup.sg = *sg; |
9b29ea95 | 719 | up = hash_lookup(pim->upstream_hash, &lookup); |
d62a17ae | 720 | return up; |
12e41d03 DL |
721 | } |
722 | ||
d62a17ae | 723 | struct pim_upstream *pim_upstream_find_or_add(struct prefix_sg *sg, |
724 | struct interface *incoming, | |
725 | int flags, const char *name) | |
e711cd3c | 726 | { |
d62a17ae | 727 | struct pim_upstream *up; |
9b29ea95 DS |
728 | struct pim_interface *pim_ifp; |
729 | ||
730 | pim_ifp = incoming->info; | |
d62a17ae | 731 | |
9b29ea95 | 732 | up = pim_upstream_find(pim_ifp->pim, sg); |
d62a17ae | 733 | |
734 | if (up) { | |
735 | if (!(up->flags & flags)) { | |
736 | up->flags |= flags; | |
737 | up->ref_count++; | |
738 | if (PIM_DEBUG_TRACE) | |
739 | zlog_debug( | |
740 | "%s(%s): upstream %s ref count %d increment", | |
741 | __PRETTY_FUNCTION__, name, up->sg_str, | |
742 | up->ref_count); | |
743 | } | |
744 | } else | |
0885a9f1 DS |
745 | up = pim_upstream_add(pim_ifp->pim, sg, incoming, flags, name, |
746 | NULL); | |
d62a17ae | 747 | |
748 | return up; | |
e711cd3c DS |
749 | } |
750 | ||
d62a17ae | 751 | void pim_upstream_ref(struct pim_upstream *up, int flags, const char *name) |
1bf16443 | 752 | { |
d62a17ae | 753 | up->flags |= flags; |
754 | ++up->ref_count; | |
755 | if (PIM_DEBUG_TRACE) | |
756 | zlog_debug("%s(%s): upstream %s ref count %d increment", | |
757 | __PRETTY_FUNCTION__, name, up->sg_str, | |
758 | up->ref_count); | |
1bf16443 | 759 | } |
760 | ||
2002dcdb DS |
761 | struct pim_upstream *pim_upstream_add(struct pim_instance *pim, |
762 | struct prefix_sg *sg, | |
d62a17ae | 763 | struct interface *incoming, int flags, |
0885a9f1 DS |
764 | const char *name, |
765 | struct pim_ifchannel *ch) | |
12e41d03 | 766 | { |
d62a17ae | 767 | struct pim_upstream *up = NULL; |
768 | int found = 0; | |
9b29ea95 | 769 | |
2002dcdb | 770 | up = pim_upstream_find(pim, sg); |
d62a17ae | 771 | if (up) { |
772 | pim_upstream_ref(up, flags, name); | |
773 | found = 1; | |
774 | } else { | |
0885a9f1 | 775 | up = pim_upstream_new(pim, sg, incoming, flags, ch); |
d62a17ae | 776 | } |
777 | ||
778 | if (PIM_DEBUG_TRACE) { | |
779 | if (up) { | |
780 | char buf[PREFIX2STR_BUFFER]; | |
781 | prefix2str(&up->rpf.rpf_addr, buf, sizeof(buf)); | |
782 | zlog_debug("%s(%s): %s, iif %s (%s) found: %d: ref_count: %d", | |
f4075cb4 | 783 | __PRETTY_FUNCTION__, name, |
55785900 CS |
784 | up->sg_str, buf, up->rpf.source_nexthop.interface ? |
785 | up->rpf.source_nexthop.interface->name : "NIL" , | |
786 | found, up->ref_count); | |
d62a17ae | 787 | } else |
788 | zlog_debug("%s(%s): (%s) failure to create", | |
789 | __PRETTY_FUNCTION__, name, | |
790 | pim_str_sg_dump(sg)); | |
791 | } | |
12e41d03 | 792 | |
d62a17ae | 793 | return up; |
12e41d03 DL |
794 | } |
795 | ||
c8fc07cb DS |
796 | /* |
797 | * Passed in up must be the upstream for ch. starch is NULL if no | |
798 | * information | |
799 | */ | |
d62a17ae | 800 | int pim_upstream_evaluate_join_desired_interface(struct pim_upstream *up, |
801 | struct pim_ifchannel *ch, | |
802 | struct pim_ifchannel *starch) | |
7a3ddda5 | 803 | { |
d62a17ae | 804 | if (ch) { |
805 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
806 | return 0; | |
807 | ||
808 | if (!pim_macro_ch_lost_assert(ch) | |
809 | && pim_macro_chisin_joins_or_include(ch)) | |
810 | return 1; | |
811 | } | |
812 | ||
813 | /* | |
814 | * joins (*,G) | |
815 | */ | |
816 | if (starch) { | |
817 | if (PIM_IF_FLAG_TEST_S_G_RPT(starch->upstream->flags)) | |
818 | return 0; | |
819 | ||
820 | if (!pim_macro_ch_lost_assert(starch) | |
821 | && pim_macro_chisin_joins_or_include(starch)) | |
822 | return 1; | |
823 | } | |
824 | ||
825 | return 0; | |
7a3ddda5 DS |
826 | } |
827 | ||
12e41d03 DL |
828 | /* |
829 | Evaluate JoinDesired(S,G): | |
830 | ||
831 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
832 | in the set: | |
833 | ||
834 | inherited_olist(S,G) = | |
835 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
836 | ||
837 | JoinDesired(S,G) may be affected by changes in the following: | |
838 | ||
839 | pim_ifp->primary_address | |
840 | pim_ifp->pim_dr_addr | |
841 | ch->ifassert_winner_metric | |
842 | ch->ifassert_winner | |
d62a17ae | 843 | ch->local_ifmembership |
12e41d03 DL |
844 | ch->ifjoin_state |
845 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
846 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
847 | ch->upstream->rpf.source_nexthop.interface | |
848 | ||
849 | See also pim_upstream_update_join_desired() below. | |
850 | */ | |
9b29ea95 DS |
851 | int pim_upstream_evaluate_join_desired(struct pim_instance *pim, |
852 | struct pim_upstream *up) | |
12e41d03 | 853 | { |
d62a17ae | 854 | struct interface *ifp; |
d62a17ae | 855 | struct pim_ifchannel *ch, *starch; |
856 | struct pim_upstream *starup = up->parent; | |
857 | int ret = 0; | |
12e41d03 | 858 | |
451fda4f | 859 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
d62a17ae | 860 | if (!ifp->info) |
861 | continue; | |
c8fc07cb | 862 | |
d62a17ae | 863 | ch = pim_ifchannel_find(ifp, &up->sg); |
c8fc07cb | 864 | |
d62a17ae | 865 | if (starup) |
866 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
867 | else | |
868 | starch = NULL; | |
c8fc07cb | 869 | |
d62a17ae | 870 | if (!ch && !starch) |
871 | continue; | |
12e41d03 | 872 | |
d62a17ae | 873 | ret += pim_upstream_evaluate_join_desired_interface(up, ch, |
874 | starch); | |
875 | } /* scan iface channel list */ | |
12e41d03 | 876 | |
d62a17ae | 877 | return ret; /* false */ |
12e41d03 DL |
878 | } |
879 | ||
880 | /* | |
881 | See also pim_upstream_evaluate_join_desired() above. | |
882 | */ | |
9b29ea95 DS |
883 | void pim_upstream_update_join_desired(struct pim_instance *pim, |
884 | struct pim_upstream *up) | |
12e41d03 | 885 | { |
d62a17ae | 886 | int was_join_desired; /* boolean */ |
887 | int is_join_desired; /* boolean */ | |
888 | ||
889 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
890 | ||
9b29ea95 | 891 | is_join_desired = pim_upstream_evaluate_join_desired(pim, up); |
d62a17ae | 892 | if (is_join_desired) |
893 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
894 | else | |
895 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
896 | ||
897 | /* switched from false to true */ | |
898 | if (is_join_desired && !was_join_desired) { | |
1eca8576 | 899 | pim_upstream_switch(pim, up, PIM_UPSTREAM_JOINED); |
d62a17ae | 900 | return; |
901 | } | |
902 | ||
903 | /* switched from true to false */ | |
904 | if (!is_join_desired && was_join_desired) { | |
1eca8576 | 905 | pim_upstream_switch(pim, up, PIM_UPSTREAM_NOTJOINED); |
d62a17ae | 906 | return; |
907 | } | |
12e41d03 DL |
908 | } |
909 | ||
910 | /* | |
911 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
912 | Transitions from Joined State | |
913 | RPF'(S,G) GenID changes | |
914 | ||
915 | The upstream (S,G) state machine remains in Joined state. If the | |
916 | Join Timer is set to expire in more than t_override seconds, reset | |
917 | it so that it expires after t_override seconds. | |
918 | */ | |
9b29ea95 DS |
919 | void pim_upstream_rpf_genid_changed(struct pim_instance *pim, |
920 | struct in_addr neigh_addr) | |
12e41d03 | 921 | { |
d62a17ae | 922 | struct listnode *up_node; |
923 | struct listnode *up_nextnode; | |
924 | struct pim_upstream *up; | |
925 | ||
926 | /* | |
927 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
928 | */ | |
9b29ea95 | 929 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { |
d62a17ae | 930 | |
931 | if (PIM_DEBUG_TRACE) { | |
932 | char neigh_str[INET_ADDRSTRLEN]; | |
933 | char rpf_addr_str[PREFIX_STRLEN]; | |
934 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, | |
935 | sizeof(neigh_str)); | |
936 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, | |
937 | sizeof(rpf_addr_str)); | |
938 | zlog_debug( | |
8dbdb215 | 939 | "%s: matching neigh=%s against upstream (S,G)=%s[%s] joined=%d rpf_addr=%s", |
996c9314 LB |
940 | __PRETTY_FUNCTION__, neigh_str, up->sg_str, |
941 | pim->vrf->name, | |
d62a17ae | 942 | up->join_state == PIM_UPSTREAM_JOINED, |
943 | rpf_addr_str); | |
944 | } | |
945 | ||
946 | /* consider only (S,G) upstream in Joined state */ | |
947 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
948 | continue; | |
949 | ||
950 | /* match RPF'(S,G)=neigh_addr */ | |
951 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) | |
952 | continue; | |
953 | ||
954 | pim_upstream_join_timer_decrease_to_t_override( | |
955 | "RPF'(S,G) GenID change", up); | |
956 | } | |
12e41d03 DL |
957 | } |
958 | ||
959 | ||
960 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
961 | struct interface *old_rpf_ifp) | |
962 | { | |
d62a17ae | 963 | struct listnode *chnode; |
964 | struct listnode *chnextnode; | |
965 | struct pim_ifchannel *ch; | |
966 | ||
967 | /* search all ifchannels */ | |
968 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
969 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
970 | if ( | |
971 | /* RPF_interface(S) was NOT I */ | |
972 | (old_rpf_ifp == ch->interface) && | |
973 | /* RPF_interface(S) stopped being I */ | |
974 | (ch->upstream->rpf.source_nexthop | |
975 | .interface != ch->interface)) { | |
976 | assert_action_a5(ch); | |
977 | } | |
978 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
979 | ||
980 | pim_ifchannel_update_assert_tracking_desired(ch); | |
981 | } | |
12e41d03 DL |
982 | } |
983 | ||
984 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
985 | { | |
d62a17ae | 986 | struct listnode *chnode; |
987 | struct listnode *chnextnode; | |
988 | struct pim_ifchannel *ch; | |
989 | ||
990 | /* scan per-interface (S,G) state */ | |
991 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
992 | pim_ifchannel_update_could_assert(ch); | |
993 | } /* scan iface channel list */ | |
12e41d03 DL |
994 | } |
995 | ||
996 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
997 | { | |
d62a17ae | 998 | struct listnode *chnode; |
999 | struct listnode *chnextnode; | |
1000 | struct pim_ifchannel *ch; | |
12e41d03 | 1001 | |
d62a17ae | 1002 | /* scan per-interface (S,G) state */ |
1003 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1004 | pim_ifchannel_update_my_assert_metric(ch); | |
12e41d03 | 1005 | |
d62a17ae | 1006 | } /* scan iface channel list */ |
12e41d03 DL |
1007 | } |
1008 | ||
1009 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
1010 | { | |
d62a17ae | 1011 | struct listnode *chnode; |
1012 | struct listnode *chnextnode; | |
1013 | struct pim_interface *pim_ifp; | |
1014 | struct pim_ifchannel *ch; | |
1015 | ||
1016 | /* scan per-interface (S,G) state */ | |
1017 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1018 | if (!ch->interface) | |
1019 | continue; | |
1020 | pim_ifp = ch->interface->info; | |
1021 | if (!pim_ifp) | |
1022 | continue; | |
1023 | ||
1024 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1025 | ||
1026 | } /* scan iface channel list */ | |
12e41d03 | 1027 | } |
f14248dd | 1028 | |
1bf16443 | 1029 | /* When kat is stopped CouldRegister goes to false so we need to |
1030 | * transition the (S, G) on FHR to NI state and remove reg tunnel | |
1031 | * from the OIL */ | |
9b29ea95 DS |
1032 | static void pim_upstream_fhr_kat_expiry(struct pim_instance *pim, |
1033 | struct pim_upstream *up) | |
1bf16443 | 1034 | { |
d62a17ae | 1035 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
1036 | return; | |
1037 | ||
1038 | if (PIM_DEBUG_TRACE) | |
1039 | zlog_debug("kat expired on %s; clear fhr reg state", | |
1040 | up->sg_str); | |
1041 | ||
1042 | /* stop reg-stop timer */ | |
1043 | THREAD_OFF(up->t_rs_timer); | |
1044 | /* remove regiface from the OIL if it is there*/ | |
9b29ea95 | 1045 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1046 | PIM_OIF_FLAG_PROTO_PIM); |
1047 | /* clear the register state */ | |
1048 | up->reg_state = PIM_REG_NOINFO; | |
1049 | PIM_UPSTREAM_FLAG_UNSET_FHR(up->flags); | |
1bf16443 | 1050 | } |
1051 | ||
1052 | /* When kat is started CouldRegister can go to true. And if it does we | |
1053 | * need to transition the (S, G) on FHR to JOINED state and add reg tunnel | |
1054 | * to the OIL */ | |
1055 | static void pim_upstream_fhr_kat_start(struct pim_upstream *up) | |
1056 | { | |
d62a17ae | 1057 | if (pim_upstream_could_register(up)) { |
1058 | if (PIM_DEBUG_TRACE) | |
1059 | zlog_debug( | |
1060 | "kat started on %s; set fhr reg state to joined", | |
1061 | up->sg_str); | |
1062 | ||
1063 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
1064 | if (up->reg_state == PIM_REG_NOINFO) | |
1065 | pim_register_join(up); | |
1066 | } | |
1bf16443 | 1067 | } |
1068 | ||
f14248dd DS |
1069 | /* |
1070 | * On an RP, the PMBR value must be cleared when the | |
1071 | * Keepalive Timer expires | |
1bf16443 | 1072 | * KAT expiry indicates that flow is inactive. If the flow was created or |
1073 | * maintained by activity now is the time to deref it. | |
f14248dd | 1074 | */ |
d62a17ae | 1075 | static int pim_upstream_keep_alive_timer(struct thread *t) |
f14248dd | 1076 | { |
d62a17ae | 1077 | struct pim_upstream *up; |
8e5f97e3 | 1078 | struct pim_instance *pim; |
d62a17ae | 1079 | |
1080 | up = THREAD_ARG(t); | |
8e5f97e3 | 1081 | pim = up->channel_oil->pim; |
d62a17ae | 1082 | |
8e5f97e3 | 1083 | if (I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 1084 | pim_br_clear_pmbr(&up->sg); |
1085 | /* | |
1086 | * We need to do more here :) | |
1087 | * But this is the start. | |
1088 | */ | |
1089 | } | |
1090 | ||
1091 | /* source is no longer active - pull the SA from MSDP's cache */ | |
472ad383 | 1092 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 1093 | |
1094 | /* if entry was created because of activity we need to deref it */ | |
1095 | if (PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
8e5f97e3 | 1096 | pim_upstream_fhr_kat_expiry(pim, up); |
d62a17ae | 1097 | if (PIM_DEBUG_TRACE) |
996c9314 LB |
1098 | zlog_debug( |
1099 | "kat expired on %s[%s]; remove stream reference", | |
1100 | up->sg_str, pim->vrf->name); | |
d62a17ae | 1101 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(up->flags); |
8e5f97e3 | 1102 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
d62a17ae | 1103 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) { |
8022df6a DS |
1104 | struct pim_upstream *parent = up->parent; |
1105 | ||
d62a17ae | 1106 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(up->flags); |
8e5f97e3 | 1107 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
8022df6a DS |
1108 | |
1109 | if (parent) { | |
996c9314 LB |
1110 | pim_jp_agg_single_upstream_send(&parent->rpf, parent, |
1111 | true); | |
8022df6a | 1112 | } |
d62a17ae | 1113 | } |
1114 | ||
1115 | return 0; | |
f14248dd DS |
1116 | } |
1117 | ||
d62a17ae | 1118 | void pim_upstream_keep_alive_timer_start(struct pim_upstream *up, uint32_t time) |
f14248dd | 1119 | { |
d62a17ae | 1120 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { |
1121 | if (PIM_DEBUG_TRACE) | |
1122 | zlog_debug("kat start on %s with no stream reference", | |
1123 | up->sg_str); | |
1124 | } | |
1125 | THREAD_OFF(up->t_ka_timer); | |
1126 | thread_add_timer(master, pim_upstream_keep_alive_timer, up, time, | |
1127 | &up->t_ka_timer); | |
1128 | ||
1129 | /* any time keepalive is started against a SG we will have to | |
1130 | * re-evaluate our active source database */ | |
1131 | pim_msdp_sa_local_update(up); | |
1bf16443 | 1132 | } |
1133 | ||
1134 | /* MSDP on RP needs to know if a source is registerable to this RP */ | |
d62a17ae | 1135 | static int pim_upstream_msdp_reg_timer(struct thread *t) |
1bf16443 | 1136 | { |
472ad383 DS |
1137 | struct pim_upstream *up = THREAD_ARG(t); |
1138 | struct pim_instance *pim = up->channel_oil->pim; | |
1bf16443 | 1139 | |
d62a17ae | 1140 | /* source is no longer active - pull the SA from MSDP's cache */ |
472ad383 | 1141 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 1142 | return 1; |
1bf16443 | 1143 | } |
d62a17ae | 1144 | void pim_upstream_msdp_reg_timer_start(struct pim_upstream *up) |
1bf16443 | 1145 | { |
d62a17ae | 1146 | THREAD_OFF(up->t_msdp_reg_timer); |
1147 | thread_add_timer(master, pim_upstream_msdp_reg_timer, up, | |
1148 | PIM_MSDP_REG_RXED_PERIOD, &up->t_msdp_reg_timer); | |
1bf16443 | 1149 | |
d62a17ae | 1150 | pim_msdp_sa_local_update(up); |
f14248dd | 1151 | } |
cb40b272 DS |
1152 | |
1153 | /* | |
1154 | * 4.2.1 Last-Hop Switchover to the SPT | |
1155 | * | |
1156 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
1157 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
1158 | * router, it has the option of switching to receive the traffic on a | |
1159 | * shortest path tree (SPT). | |
1160 | * | |
1161 | * The decision for a router to switch to the SPT is controlled as | |
1162 | * follows: | |
1163 | * | |
1164 | * void | |
1165 | * CheckSwitchToSpt(S,G) { | |
1166 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
1167 | * (+) pim_include(S,G) != NULL ) | |
1168 | * AND SwitchToSptDesired(S,G) ) { | |
1169 | * # Note: Restarting the KAT will result in the SPT switch | |
1170 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1171 | * } | |
1172 | * } | |
1173 | * | |
1174 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
1175 | * defined. An "infinite threshold" policy can be implemented by making | |
1176 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
1177 | * first packet" policy can be implemented by making | |
1178 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
1179 | * received for the source and group. | |
1180 | */ | |
8e5f97e3 DS |
1181 | int pim_upstream_switch_to_spt_desired(struct pim_instance *pim, |
1182 | struct prefix_sg *sg) | |
cb40b272 | 1183 | { |
8e5f97e3 | 1184 | if (I_am_RP(pim, sg->grp)) |
d62a17ae | 1185 | return 1; |
a3b58b4a | 1186 | |
d62a17ae | 1187 | return 0; |
cb40b272 | 1188 | } |
d7259eac | 1189 | |
d62a17ae | 1190 | int pim_upstream_is_sg_rpt(struct pim_upstream *up) |
80d9c3a0 | 1191 | { |
d62a17ae | 1192 | struct listnode *chnode; |
1193 | struct pim_ifchannel *ch; | |
f21597f0 | 1194 | |
d62a17ae | 1195 | for (ALL_LIST_ELEMENTS_RO(up->ifchannels, chnode, ch)) { |
1196 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
1197 | return 1; | |
1198 | } | |
e43b8697 | 1199 | |
d62a17ae | 1200 | return 0; |
80d9c3a0 | 1201 | } |
3a66b17b DS |
1202 | /* |
1203 | * After receiving a packet set SPTbit: | |
1204 | * void | |
1205 | * Update_SPTbit(S,G,iif) { | |
1206 | * if ( iif == RPF_interface(S) | |
1207 | * AND JoinDesired(S,G) == TRUE | |
1208 | * AND ( DirectlyConnected(S) == TRUE | |
1209 | * OR RPF_interface(S) != RPF_interface(RP(G)) | |
1210 | * OR inherited_olist(S,G,rpt) == NULL | |
1211 | * OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1212 | * ( RPF'(S,G) != NULL ) ) | |
1213 | * OR ( I_Am_Assert_Loser(S,G,iif) ) { | |
1214 | * Set SPTbit(S,G) to TRUE | |
1215 | * } | |
1216 | * } | |
1217 | */ | |
d62a17ae | 1218 | void pim_upstream_set_sptbit(struct pim_upstream *up, |
1219 | struct interface *incoming) | |
3a66b17b | 1220 | { |
d62a17ae | 1221 | struct pim_upstream *starup = up->parent; |
1222 | ||
1223 | // iif == RPF_interfvace(S) | |
1224 | if (up->rpf.source_nexthop.interface != incoming) { | |
1225 | if (PIM_DEBUG_TRACE) | |
1226 | zlog_debug( | |
1227 | "%s: Incoming Interface: %s is different than RPF_interface(S) %s", | |
1228 | __PRETTY_FUNCTION__, incoming->name, | |
1229 | up->rpf.source_nexthop.interface->name); | |
1230 | return; | |
1231 | } | |
1232 | ||
1233 | // AND JoinDesired(S,G) == TRUE | |
1234 | // FIXME | |
1235 | ||
1236 | // DirectlyConnected(S) == TRUE | |
1237 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1238 | up->sg.src)) { | |
1239 | if (PIM_DEBUG_TRACE) | |
1240 | zlog_debug("%s: %s is directly connected to the source", | |
1241 | __PRETTY_FUNCTION__, up->sg_str); | |
1242 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1243 | return; | |
1244 | } | |
1245 | ||
1246 | // OR RPF_interface(S) != RPF_interface(RP(G)) | |
1247 | if (!starup | |
1248 | || up->rpf.source_nexthop | |
1249 | .interface != starup->rpf.source_nexthop.interface) { | |
1250 | if (PIM_DEBUG_TRACE) | |
1251 | zlog_debug( | |
1252 | "%s: %s RPF_interface(S) != RPF_interface(RP(G))", | |
1253 | __PRETTY_FUNCTION__, up->sg_str); | |
1254 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1255 | return; | |
1256 | } | |
1257 | ||
1258 | // OR inherited_olist(S,G,rpt) == NULL | |
1259 | if (pim_upstream_is_sg_rpt(up) | |
1260 | && pim_upstream_empty_inherited_olist(up)) { | |
1261 | if (PIM_DEBUG_TRACE) | |
1262 | zlog_debug("%s: %s OR inherited_olist(S,G,rpt) == NULL", | |
1263 | __PRETTY_FUNCTION__, up->sg_str); | |
1264 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1265 | return; | |
1266 | } | |
1267 | ||
1268 | // OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1269 | // ( RPF'(S,G) != NULL ) ) | |
1270 | if (up->parent && pim_rpf_is_same(&up->rpf, &up->parent->rpf)) { | |
1271 | if (PIM_DEBUG_TRACE) | |
1272 | zlog_debug("%s: %s RPF'(S,G) is the same as RPF'(*,G)", | |
1273 | __PRETTY_FUNCTION__, up->sg_str); | |
1274 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1275 | return; | |
1276 | } | |
1277 | ||
1278 | return; | |
3a66b17b | 1279 | } |
80d9c3a0 | 1280 | |
d62a17ae | 1281 | const char *pim_upstream_state2str(enum pim_upstream_state join_state) |
d7259eac | 1282 | { |
d62a17ae | 1283 | switch (join_state) { |
1284 | case PIM_UPSTREAM_NOTJOINED: | |
1285 | return "NotJoined"; | |
1286 | break; | |
1287 | case PIM_UPSTREAM_JOINED: | |
1288 | return "Joined"; | |
1289 | break; | |
1290 | } | |
1291 | return "Unknown"; | |
d7259eac | 1292 | } |
627ed2a3 | 1293 | |
d62a17ae | 1294 | const char *pim_reg_state2str(enum pim_reg_state reg_state, char *state_str) |
e0e127b0 | 1295 | { |
d62a17ae | 1296 | switch (reg_state) { |
1297 | case PIM_REG_NOINFO: | |
1298 | strcpy(state_str, "RegNoInfo"); | |
1299 | break; | |
1300 | case PIM_REG_JOIN: | |
1301 | strcpy(state_str, "RegJoined"); | |
1302 | break; | |
1303 | case PIM_REG_JOIN_PENDING: | |
1304 | strcpy(state_str, "RegJoinPend"); | |
1305 | break; | |
1306 | case PIM_REG_PRUNE: | |
1307 | strcpy(state_str, "RegPrune"); | |
1308 | break; | |
1309 | default: | |
1310 | strcpy(state_str, "RegUnknown"); | |
1311 | } | |
1312 | return state_str; | |
e0e127b0 | 1313 | } |
1314 | ||
d62a17ae | 1315 | static int pim_upstream_register_stop_timer(struct thread *t) |
627ed2a3 | 1316 | { |
d62a17ae | 1317 | struct pim_interface *pim_ifp; |
8e5f97e3 | 1318 | struct pim_instance *pim; |
d62a17ae | 1319 | struct pim_upstream *up; |
1320 | struct pim_rpf *rpg; | |
1321 | struct ip ip_hdr; | |
1322 | up = THREAD_ARG(t); | |
8e5f97e3 | 1323 | pim = up->channel_oil->pim; |
d62a17ae | 1324 | |
1325 | if (PIM_DEBUG_TRACE) { | |
1326 | char state_str[PIM_REG_STATE_STR_LEN]; | |
8dbdb215 DS |
1327 | zlog_debug("%s: (S,G)=%s[%s] upstream register stop timer %s", |
1328 | __PRETTY_FUNCTION__, up->sg_str, pim->vrf->name, | |
d62a17ae | 1329 | pim_reg_state2str(up->reg_state, state_str)); |
1330 | } | |
1331 | ||
1332 | switch (up->reg_state) { | |
1333 | case PIM_REG_JOIN_PENDING: | |
1334 | up->reg_state = PIM_REG_JOIN; | |
8e5f97e3 | 1335 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1336 | PIM_OIF_FLAG_PROTO_PIM); |
1337 | break; | |
1338 | case PIM_REG_JOIN: | |
1339 | break; | |
1340 | case PIM_REG_PRUNE: | |
1341 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
1342 | if (!pim_ifp) { | |
1343 | if (PIM_DEBUG_TRACE) | |
1344 | zlog_debug( | |
1345 | "%s: Interface: %s is not configured for pim", | |
1346 | __PRETTY_FUNCTION__, | |
1347 | up->rpf.source_nexthop.interface->name); | |
1348 | return 0; | |
1349 | } | |
1350 | up->reg_state = PIM_REG_JOIN_PENDING; | |
1351 | pim_upstream_start_register_stop_timer(up, 1); | |
1352 | ||
1353 | if (((up->channel_oil->cc.lastused / 100) | |
2f5b0028 | 1354 | > pim->keep_alive_time) |
d9c9a9ee | 1355 | && (I_am_RP(pim_ifp->pim, up->sg.grp))) { |
d62a17ae | 1356 | if (PIM_DEBUG_TRACE) |
1357 | zlog_debug( | |
1358 | "%s: Stop sending the register, because I am the RP and we haven't seen a packet in a while", | |
1359 | __PRETTY_FUNCTION__); | |
1360 | return 0; | |
1361 | } | |
d9c9a9ee | 1362 | rpg = RP(pim_ifp->pim, up->sg.grp); |
1e7a3a2a DS |
1363 | if (!rpg) { |
1364 | if (PIM_DEBUG_TRACE) | |
1365 | zlog_debug( | |
1366 | "%s: Cannot send register for %s no RPF to the RP", | |
1367 | __PRETTY_FUNCTION__, up->sg_str); | |
1368 | return 0; | |
1369 | } | |
d62a17ae | 1370 | memset(&ip_hdr, 0, sizeof(struct ip)); |
1371 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
1372 | ip_hdr.ip_hl = 5; | |
1373 | ip_hdr.ip_v = 4; | |
1374 | ip_hdr.ip_src = up->sg.src; | |
1375 | ip_hdr.ip_dst = up->sg.grp; | |
1376 | ip_hdr.ip_len = htons(20); | |
1377 | // checksum is broken | |
1378 | pim_register_send((uint8_t *)&ip_hdr, sizeof(struct ip), | |
1379 | pim_ifp->primary_address, rpg, 1, up); | |
1380 | break; | |
1381 | default: | |
1382 | break; | |
70e7fda8 | 1383 | } |
d62a17ae | 1384 | |
1385 | return 0; | |
627ed2a3 DS |
1386 | } |
1387 | ||
d62a17ae | 1388 | void pim_upstream_start_register_stop_timer(struct pim_upstream *up, |
1389 | int null_register) | |
627ed2a3 | 1390 | { |
d62a17ae | 1391 | uint32_t time; |
1392 | ||
1393 | THREAD_TIMER_OFF(up->t_rs_timer); | |
1394 | ||
1395 | if (!null_register) { | |
1396 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1397 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1398 | time = lower + (random() % (upper - lower + 1)) | |
1399 | - PIM_REGISTER_PROBE_PERIOD; | |
1400 | } else | |
1401 | time = PIM_REGISTER_PROBE_PERIOD; | |
1402 | ||
1403 | if (PIM_DEBUG_TRACE) { | |
1404 | zlog_debug( | |
1405 | "%s: (S,G)=%s Starting upstream register stop timer %d", | |
1406 | __PRETTY_FUNCTION__, up->sg_str, time); | |
1407 | } | |
1408 | thread_add_timer(master, pim_upstream_register_stop_timer, up, time, | |
1409 | &up->t_rs_timer); | |
627ed2a3 | 1410 | } |
4fdc8f36 | 1411 | |
9b29ea95 DS |
1412 | int pim_upstream_inherited_olist_decide(struct pim_instance *pim, |
1413 | struct pim_upstream *up) | |
4fdc8f36 | 1414 | { |
d62a17ae | 1415 | struct interface *ifp; |
1416 | struct pim_interface *pim_ifp = NULL; | |
1417 | struct pim_ifchannel *ch, *starch; | |
d62a17ae | 1418 | struct pim_upstream *starup = up->parent; |
1419 | int output_intf = 0; | |
1420 | ||
1421 | if (up->rpf.source_nexthop.interface) | |
1422 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
1423 | else { | |
1424 | if (PIM_DEBUG_TRACE) | |
1425 | zlog_debug("%s: up %s RPF is not present", | |
1426 | __PRETTY_FUNCTION__, up->sg_str); | |
1427 | } | |
1428 | if (pim_ifp && !up->channel_oil) | |
611925dc DS |
1429 | up->channel_oil = pim_channel_oil_add( |
1430 | pim, &up->sg, pim_ifp->mroute_vif_index); | |
d62a17ae | 1431 | |
451fda4f | 1432 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
d62a17ae | 1433 | if (!ifp->info) |
1434 | continue; | |
1435 | ||
1436 | ch = pim_ifchannel_find(ifp, &up->sg); | |
1437 | ||
1438 | if (starup) | |
1439 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
1440 | else | |
1441 | starch = NULL; | |
1442 | ||
1443 | if (!ch && !starch) | |
1444 | continue; | |
1445 | ||
1446 | if (pim_upstream_evaluate_join_desired_interface(up, ch, | |
1447 | starch)) { | |
1448 | int flag = PIM_OIF_FLAG_PROTO_PIM; | |
1449 | ||
1450 | if (!ch) | |
1451 | flag = PIM_OIF_FLAG_PROTO_STAR; | |
1452 | ||
1453 | pim_channel_add_oif(up->channel_oil, ifp, flag); | |
1454 | output_intf++; | |
1455 | } | |
1456 | } | |
1457 | ||
1458 | return output_intf; | |
b5183fd1 DS |
1459 | } |
1460 | ||
1461 | /* | |
1462 | * For a given upstream, determine the inherited_olist | |
1463 | * and apply it. | |
1464 | * | |
1465 | * inherited_olist(S,G,rpt) = | |
1466 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1467 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1468 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1469 | * | |
1470 | * inherited_olist(S,G) = | |
1471 | * inherited_olist(S,G,rpt) (+) | |
1472 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1473 | * | |
1474 | * return 1 if there are any output interfaces | |
1475 | * return 0 if there are not any output interfaces | |
1476 | */ | |
9b29ea95 DS |
1477 | int pim_upstream_inherited_olist(struct pim_instance *pim, |
1478 | struct pim_upstream *up) | |
b5183fd1 | 1479 | { |
9b29ea95 | 1480 | int output_intf = pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 1481 | |
1482 | /* | |
1483 | * If we have output_intf switch state to Join and work like normal | |
1484 | * If we don't have an output_intf that means we are probably a | |
1485 | * switch on a stick so turn on forwarding to just accept the | |
1486 | * incoming packets so we don't bother the other stuff! | |
1487 | */ | |
1488 | if (output_intf) | |
1eca8576 | 1489 | pim_upstream_switch(pim, up, PIM_UPSTREAM_JOINED); |
d62a17ae | 1490 | else |
1491 | forward_on(up); | |
1492 | ||
1493 | return output_intf; | |
4fdc8f36 | 1494 | } |
d3dd1804 | 1495 | |
d62a17ae | 1496 | int pim_upstream_empty_inherited_olist(struct pim_upstream *up) |
80d9c3a0 | 1497 | { |
d62a17ae | 1498 | return pim_channel_oil_empty(up->channel_oil); |
80d9c3a0 DS |
1499 | } |
1500 | ||
d3dd1804 DS |
1501 | /* |
1502 | * When we have a new neighbor, | |
1503 | * find upstreams that don't have their rpf_addr | |
1504 | * set and see if the new neighbor allows | |
1505 | * the join to be sent | |
1506 | */ | |
9b29ea95 | 1507 | void pim_upstream_find_new_rpf(struct pim_instance *pim) |
d3dd1804 | 1508 | { |
d62a17ae | 1509 | struct listnode *up_node; |
1510 | struct listnode *up_nextnode; | |
1511 | struct pim_upstream *up; | |
1512 | ||
1513 | /* | |
1514 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
1515 | */ | |
9b29ea95 | 1516 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { |
d62a17ae | 1517 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { |
1518 | if (PIM_DEBUG_TRACE) | |
1519 | zlog_debug( | |
1520 | "Upstream %s without a path to send join, checking", | |
1521 | up->sg_str); | |
2002dcdb | 1522 | pim_rpf_update(pim, up, NULL, 1); |
d62a17ae | 1523 | } |
d3dd1804 | 1524 | } |
d3dd1804 | 1525 | } |
0f588989 | 1526 | |
7c591950 | 1527 | unsigned int pim_upstream_hash_key(void *arg) |
0f588989 | 1528 | { |
d62a17ae | 1529 | struct pim_upstream *up = (struct pim_upstream *)arg; |
0f588989 | 1530 | |
d62a17ae | 1531 | return jhash_2words(up->sg.src.s_addr, up->sg.grp.s_addr, 0); |
0f588989 DS |
1532 | } |
1533 | ||
9b29ea95 | 1534 | void pim_upstream_terminate(struct pim_instance *pim) |
0f588989 | 1535 | { |
172e45dc DS |
1536 | struct listnode *node, *nnode; |
1537 | struct pim_upstream *up; | |
1538 | ||
1539 | if (pim->upstream_list) { | |
1540 | for (ALL_LIST_ELEMENTS(pim->upstream_list, node, nnode, up)) | |
1541 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); | |
1542 | ||
affe9e99 | 1543 | list_delete_and_null(&pim->upstream_list); |
172e45dc | 1544 | } |
0f588989 | 1545 | |
9b29ea95 DS |
1546 | if (pim->upstream_hash) |
1547 | hash_free(pim->upstream_hash); | |
1548 | pim->upstream_hash = NULL; | |
0c68972d DS |
1549 | |
1550 | if (pim->upstream_sg_wheel) | |
1551 | wheel_delete(pim->upstream_sg_wheel); | |
1552 | pim->upstream_sg_wheel = NULL; | |
0f588989 DS |
1553 | } |
1554 | ||
7c591950 | 1555 | int pim_upstream_equal(const void *arg1, const void *arg2) |
0f588989 | 1556 | { |
d62a17ae | 1557 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
1558 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
0f588989 | 1559 | |
d62a17ae | 1560 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) |
1561 | && (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
1562 | return 1; | |
0f588989 | 1563 | |
d62a17ae | 1564 | return 0; |
0f588989 DS |
1565 | } |
1566 | ||
1bf16443 | 1567 | /* rfc4601:section-4.2:"Data Packet Forwarding Rules" defines |
1568 | * the cases where kat has to be restarted on rxing traffic - | |
1569 | * | |
1570 | * if( DirectlyConnected(S) == TRUE AND iif == RPF_interface(S) ) { | |
1571 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1572 | * # Note: a register state transition or UpstreamJPState(S,G) | |
1573 | * # transition may happen as a result of restarting | |
1574 | * # KeepaliveTimer, and must be dealt with here. | |
1575 | * } | |
1576 | * if( iif == RPF_interface(S) AND UpstreamJPState(S,G) == Joined AND | |
1577 | * inherited_olist(S,G) != NULL ) { | |
1578 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1579 | * } | |
1580 | */ | |
1581 | static bool pim_upstream_kat_start_ok(struct pim_upstream *up) | |
1582 | { | |
8e5f97e3 DS |
1583 | struct pim_instance *pim = up->channel_oil->pim; |
1584 | ||
d62a17ae | 1585 | /* "iif == RPF_interface(S)" check has to be done by the kernel or hw |
1586 | * so we will skip that here */ | |
1587 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1588 | up->sg.src)) { | |
1589 | return true; | |
1590 | } | |
1591 | ||
1592 | if ((up->join_state == PIM_UPSTREAM_JOINED) | |
1593 | && !pim_upstream_empty_inherited_olist(up)) { | |
1594 | /* XXX: I have added this RP check just for 3.2 and it's a | |
1595 | * digression from | |
1596 | * what rfc-4601 says. Till now we were only running KAT on FHR | |
1597 | * and RP and | |
1598 | * there is some angst around making the change to run it all | |
1599 | * routers that | |
1600 | * maintain the (S, G) state. This is tracked via CM-13601 and | |
1601 | * MUST be | |
1602 | * removed to handle spt turn-arounds correctly in a 3-tier clos | |
1603 | */ | |
8e5f97e3 | 1604 | if (I_am_RP(pim, up->sg.grp)) |
d62a17ae | 1605 | return true; |
1606 | } | |
1607 | ||
1608 | return false; | |
1bf16443 | 1609 | } |
1610 | ||
9c5e4d62 DS |
1611 | /* |
1612 | * Code to check and see if we've received packets on a S,G mroute | |
1613 | * and if so to set the SPT bit appropriately | |
1614 | */ | |
d62a17ae | 1615 | static void pim_upstream_sg_running(void *arg) |
9c5e4d62 | 1616 | { |
d62a17ae | 1617 | struct pim_upstream *up = (struct pim_upstream *)arg; |
8e5f97e3 | 1618 | struct pim_instance *pim = up->channel_oil->pim; |
d62a17ae | 1619 | |
1620 | // No packet can have arrived here if this is the case | |
8e5f97e3 | 1621 | if (!up->channel_oil->installed) { |
d62a17ae | 1622 | if (PIM_DEBUG_TRACE) |
6c65db5f | 1623 | zlog_debug("%s: %s[%s] is not installed in mroute", |
996c9314 LB |
1624 | __PRETTY_FUNCTION__, up->sg_str, |
1625 | pim->vrf->name); | |
d62a17ae | 1626 | return; |
1627 | } | |
1628 | ||
1629 | /* | |
1630 | * This is a bit of a hack | |
1631 | * We've noted that we should rescan but | |
1632 | * we've missed the window for doing so in | |
1633 | * pim_zebra.c for some reason. I am | |
1634 | * only doing this at this point in time | |
1635 | * to get us up and working for the moment | |
1636 | */ | |
1637 | if (up->channel_oil->oil_inherited_rescan) { | |
1638 | if (PIM_DEBUG_TRACE) | |
1639 | zlog_debug( | |
8dbdb215 | 1640 | "%s: Handling unscanned inherited_olist for %s[%s]", |
996c9314 LB |
1641 | __PRETTY_FUNCTION__, up->sg_str, |
1642 | pim->vrf->name); | |
8e5f97e3 | 1643 | pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 1644 | up->channel_oil->oil_inherited_rescan = 0; |
1645 | } | |
1646 | pim_mroute_update_counters(up->channel_oil); | |
1647 | ||
1648 | // Have we seen packets? | |
1649 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) | |
1650 | && (up->channel_oil->cc.lastused / 100 > 30)) { | |
1651 | if (PIM_DEBUG_TRACE) { | |
1652 | zlog_debug( | |
8dbdb215 DS |
1653 | "%s[%s]: %s old packet count is equal or lastused is greater than 30, (%ld,%ld,%lld)", |
1654 | __PRETTY_FUNCTION__, up->sg_str, pim->vrf->name, | |
d62a17ae | 1655 | up->channel_oil->cc.oldpktcnt, |
1656 | up->channel_oil->cc.pktcnt, | |
1657 | up->channel_oil->cc.lastused / 100); | |
1658 | } | |
1659 | return; | |
e43b8697 | 1660 | } |
d62a17ae | 1661 | |
1662 | if (pim_upstream_kat_start_ok(up)) { | |
1663 | /* Add a source reference to the stream if | |
1664 | * one doesn't already exist */ | |
1665 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
1666 | if (PIM_DEBUG_TRACE) | |
1667 | zlog_debug( | |
8dbdb215 DS |
1668 | "source reference created on kat restart %s[%s]", |
1669 | up->sg_str, pim->vrf->name); | |
d62a17ae | 1670 | |
1671 | pim_upstream_ref(up, PIM_UPSTREAM_FLAG_MASK_SRC_STREAM, | |
1672 | __PRETTY_FUNCTION__); | |
1673 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); | |
1674 | pim_upstream_fhr_kat_start(up); | |
1675 | } | |
19b807ca | 1676 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); |
d62a17ae | 1677 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) |
19b807ca | 1678 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); |
d62a17ae | 1679 | |
1680 | if (up->sptbit != PIM_UPSTREAM_SPTBIT_TRUE) { | |
1681 | pim_upstream_set_sptbit(up, up->rpf.source_nexthop.interface); | |
850a9f99 | 1682 | } |
d62a17ae | 1683 | return; |
9c5e4d62 DS |
1684 | } |
1685 | ||
9b29ea95 | 1686 | void pim_upstream_add_lhr_star_pimreg(struct pim_instance *pim) |
a7b2b1e2 | 1687 | { |
d62a17ae | 1688 | struct pim_upstream *up; |
1689 | struct listnode *node; | |
a7b2b1e2 | 1690 | |
9b29ea95 | 1691 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { |
d62a17ae | 1692 | if (up->sg.src.s_addr != INADDR_ANY) |
1693 | continue; | |
a7b2b1e2 | 1694 | |
d62a17ae | 1695 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) |
1696 | continue; | |
a7b2b1e2 | 1697 | |
9b29ea95 | 1698 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1699 | PIM_OIF_FLAG_PROTO_IGMP); |
1700 | } | |
a7b2b1e2 DS |
1701 | } |
1702 | ||
9b29ea95 DS |
1703 | void pim_upstream_spt_prefix_list_update(struct pim_instance *pim, |
1704 | struct prefix_list *pl) | |
df94f9a9 | 1705 | { |
d62a17ae | 1706 | const char *pname = prefix_list_name(pl); |
df94f9a9 | 1707 | |
9b29ea95 DS |
1708 | if (pim->spt.plist && strcmp(pim->spt.plist, pname) == 0) { |
1709 | pim_upstream_remove_lhr_star_pimreg(pim, pname); | |
d62a17ae | 1710 | } |
df94f9a9 DS |
1711 | } |
1712 | ||
1713 | /* | |
1714 | * nlist -> The new prefix list | |
1715 | * | |
1716 | * Per Group Application of pimreg to the OIL | |
1717 | * If the prefix list tells us DENY then | |
1718 | * we need to Switchover to SPT immediate | |
1719 | * so add the pimreg. | |
1720 | * If the prefix list tells us to ACCEPT than | |
1721 | * we need to Never do the SPT so remove | |
1722 | * the interface | |
1723 | * | |
1724 | */ | |
9b29ea95 DS |
1725 | void pim_upstream_remove_lhr_star_pimreg(struct pim_instance *pim, |
1726 | const char *nlist) | |
a7b2b1e2 | 1727 | { |
d62a17ae | 1728 | struct pim_upstream *up; |
1729 | struct listnode *node; | |
1730 | struct prefix_list *np; | |
1731 | struct prefix g; | |
1732 | enum prefix_list_type apply_new; | |
1733 | ||
1734 | np = prefix_list_lookup(AFI_IP, nlist); | |
1735 | ||
1736 | g.family = AF_INET; | |
1737 | g.prefixlen = IPV4_MAX_PREFIXLEN; | |
1738 | ||
9b29ea95 | 1739 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { |
d62a17ae | 1740 | if (up->sg.src.s_addr != INADDR_ANY) |
1741 | continue; | |
1742 | ||
1743 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) | |
1744 | continue; | |
1745 | ||
1746 | if (!nlist) { | |
9b29ea95 | 1747 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1748 | PIM_OIF_FLAG_PROTO_IGMP); |
1749 | continue; | |
1750 | } | |
1751 | g.u.prefix4 = up->sg.grp; | |
1752 | apply_new = prefix_list_apply(np, &g); | |
1753 | if (apply_new == PREFIX_DENY) | |
9b29ea95 | 1754 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1755 | PIM_OIF_FLAG_PROTO_IGMP); |
1756 | else | |
9b29ea95 | 1757 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1758 | PIM_OIF_FLAG_PROTO_IGMP); |
1759 | } | |
a7b2b1e2 DS |
1760 | } |
1761 | ||
9b29ea95 | 1762 | void pim_upstream_init(struct pim_instance *pim) |
0f588989 | 1763 | { |
9fb302f4 DS |
1764 | char hash_name[64]; |
1765 | ||
9b29ea95 | 1766 | pim->upstream_sg_wheel = |
d62a17ae | 1767 | wheel_init(master, 31000, 100, pim_upstream_hash_key, |
1768 | pim_upstream_sg_running); | |
9fb302f4 | 1769 | |
996c9314 | 1770 | snprintf(hash_name, 64, "PIM %s Upstream Hash", pim->vrf->name); |
9b29ea95 | 1771 | pim->upstream_hash = hash_create_size(8192, pim_upstream_hash_key, |
9fb302f4 | 1772 | pim_upstream_equal, hash_name); |
d62a17ae | 1773 | |
9b29ea95 | 1774 | pim->upstream_list = list_new(); |
9b29ea95 | 1775 | pim->upstream_list->cmp = pim_upstream_compare; |
0f588989 | 1776 | } |