]>
Commit | Line | Data |
---|---|---|
12e41d03 | 1 | /* |
896014f4 DL |
2 | * PIM for Quagga |
3 | * Copyright (C) 2008 Everton da Silva Marques | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; see the file COPYING; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
12e41d03 DL |
19 | |
20 | #include <zebra.h> | |
21 | ||
12e41d03 DL |
22 | #include "log.h" |
23 | #include "zclient.h" | |
24 | #include "memory.h" | |
25 | #include "thread.h" | |
26 | #include "linklist.h" | |
dfe43e25 DW |
27 | #include "vty.h" |
28 | #include "plist.h" | |
0f588989 DS |
29 | #include "hash.h" |
30 | #include "jhash.h" | |
9c5e4d62 | 31 | #include "wheel.h" |
12e41d03 DL |
32 | |
33 | #include "pimd.h" | |
34 | #include "pim_pim.h" | |
35 | #include "pim_str.h" | |
36 | #include "pim_time.h" | |
37 | #include "pim_iface.h" | |
38 | #include "pim_join.h" | |
39 | #include "pim_zlookup.h" | |
40 | #include "pim_upstream.h" | |
41 | #include "pim_ifchannel.h" | |
42 | #include "pim_neighbor.h" | |
43 | #include "pim_rpf.h" | |
44 | #include "pim_zebra.h" | |
45 | #include "pim_oil.h" | |
46 | #include "pim_macro.h" | |
8f5f5e91 | 47 | #include "pim_rp.h" |
f14248dd | 48 | #include "pim_br.h" |
627ed2a3 | 49 | #include "pim_register.h" |
3c72d654 | 50 | #include "pim_msdp.h" |
982bff89 | 51 | #include "pim_jp_agg.h" |
1bc98276 | 52 | #include "pim_nht.h" |
15a5dafe | 53 | #include "pim_ssm.h" |
b9f3a51c | 54 | #include "pim_vxlan.h" |
12e41d03 | 55 | |
982bff89 | 56 | static void join_timer_stop(struct pim_upstream *up); |
d62a17ae | 57 | static void |
58 | pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); | |
12e41d03 | 59 | |
cfa91a87 DS |
60 | /* |
61 | * A (*,G) or a (*,*) is going away | |
62 | * remove the parent pointer from | |
63 | * those pointing at us | |
64 | */ | |
9b29ea95 DS |
65 | static void pim_upstream_remove_children(struct pim_instance *pim, |
66 | struct pim_upstream *up) | |
cfa91a87 | 67 | { |
d62a17ae | 68 | struct pim_upstream *child; |
69 | ||
70 | if (!up->sources) | |
71 | return; | |
72 | ||
73 | while (!list_isempty(up->sources)) { | |
74 | child = listnode_head(up->sources); | |
75 | listnode_delete(up->sources, child); | |
76 | if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(child->flags)) { | |
77 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(child->flags); | |
9b29ea95 DS |
78 | child = pim_upstream_del(pim, child, |
79 | __PRETTY_FUNCTION__); | |
d62a17ae | 80 | } |
70c86421 | 81 | if (child) { |
d62a17ae | 82 | child->parent = NULL; |
70c86421 AK |
83 | if (PIM_UPSTREAM_FLAG_TEST_USE_RPT(child->flags)) |
84 | pim_upstream_mroute_iif_update( | |
85 | child->channel_oil, | |
86 | __func__); | |
87 | } | |
d62a17ae | 88 | } |
6a154c88 | 89 | list_delete(&up->sources); |
cfa91a87 DS |
90 | } |
91 | ||
92 | /* | |
93 | * A (*,G) or a (*,*) is being created | |
94 | * Find the children that would point | |
95 | * at us. | |
96 | */ | |
9b29ea95 DS |
97 | static void pim_upstream_find_new_children(struct pim_instance *pim, |
98 | struct pim_upstream *up) | |
cfa91a87 | 99 | { |
d62a17ae | 100 | struct pim_upstream *child; |
101 | struct listnode *ch_node; | |
102 | ||
103 | if ((up->sg.src.s_addr != INADDR_ANY) | |
104 | && (up->sg.grp.s_addr != INADDR_ANY)) | |
105 | return; | |
106 | ||
107 | if ((up->sg.src.s_addr == INADDR_ANY) | |
108 | && (up->sg.grp.s_addr == INADDR_ANY)) | |
109 | return; | |
110 | ||
9b29ea95 | 111 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, ch_node, child)) { |
d62a17ae | 112 | if ((up->sg.grp.s_addr != INADDR_ANY) |
113 | && (child->sg.grp.s_addr == up->sg.grp.s_addr) | |
114 | && (child != up)) { | |
115 | child->parent = up; | |
116 | listnode_add_sort(up->sources, child); | |
70c86421 AK |
117 | if (PIM_UPSTREAM_FLAG_TEST_USE_RPT(child->flags)) |
118 | pim_upstream_mroute_iif_update( | |
119 | child->channel_oil, | |
120 | __func__); | |
d62a17ae | 121 | } |
03417ccd | 122 | } |
cfa91a87 DS |
123 | } |
124 | ||
4d99418b DS |
125 | /* |
126 | * If we have a (*,*) || (S,*) there is no parent | |
127 | * If we have a (S,G), find the (*,G) | |
128 | * If we have a (*,G), find the (*,*) | |
129 | */ | |
9b29ea95 DS |
130 | static struct pim_upstream *pim_upstream_find_parent(struct pim_instance *pim, |
131 | struct pim_upstream *child) | |
4d99418b | 132 | { |
d62a17ae | 133 | struct prefix_sg any = child->sg; |
134 | struct pim_upstream *up = NULL; | |
4d99418b | 135 | |
d62a17ae | 136 | // (S,G) |
137 | if ((child->sg.src.s_addr != INADDR_ANY) | |
138 | && (child->sg.grp.s_addr != INADDR_ANY)) { | |
139 | any.src.s_addr = INADDR_ANY; | |
9b29ea95 | 140 | up = pim_upstream_find(pim, &any); |
03417ccd | 141 | |
d62a17ae | 142 | if (up) |
143 | listnode_add(up->sources, child); | |
03417ccd | 144 | |
d62a17ae | 145 | return up; |
146 | } | |
4d99418b | 147 | |
d62a17ae | 148 | return NULL; |
4d99418b DS |
149 | } |
150 | ||
12e41d03 DL |
151 | static void upstream_channel_oil_detach(struct pim_upstream *up) |
152 | { | |
a155fed5 AK |
153 | struct channel_oil *channel_oil = up->channel_oil; |
154 | ||
155 | if (channel_oil) { | |
d62a17ae | 156 | /* Detaching from channel_oil, channel_oil may exist post del, |
157 | but upstream would not keep reference of it | |
158 | */ | |
a155fed5 | 159 | channel_oil->up = NULL; |
d62a17ae | 160 | up->channel_oil = NULL; |
a155fed5 AK |
161 | |
162 | /* attempt to delete channel_oil; if channel_oil is being held | |
163 | * because of other references cleanup info such as "Mute" | |
164 | * inferred from the parent upstream | |
165 | */ | |
166 | pim_channel_oil_upstream_deref(channel_oil); | |
d62a17ae | 167 | } |
a155fed5 | 168 | |
12e41d03 DL |
169 | } |
170 | ||
9b29ea95 DS |
171 | struct pim_upstream *pim_upstream_del(struct pim_instance *pim, |
172 | struct pim_upstream *up, const char *name) | |
12e41d03 | 173 | { |
7692c5ae DS |
174 | struct listnode *node, *nnode; |
175 | struct pim_ifchannel *ch; | |
d62a17ae | 176 | bool notify_msdp = false; |
177 | struct prefix nht_p; | |
178 | ||
23fc858a | 179 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 180 | zlog_debug( |
8dbdb215 | 181 | "%s(%s): Delete %s[%s] ref count: %d , flags: %d c_oil ref count %d (Pre decrement)", |
996c9314 LB |
182 | __PRETTY_FUNCTION__, name, up->sg_str, pim->vrf->name, |
183 | up->ref_count, up->flags, | |
184 | up->channel_oil->oil_ref_count); | |
d62a17ae | 185 | |
e83f3b31 | 186 | assert(up->ref_count > 0); |
187 | ||
d62a17ae | 188 | --up->ref_count; |
189 | ||
190 | if (up->ref_count >= 1) | |
191 | return up; | |
192 | ||
193 | THREAD_OFF(up->t_ka_timer); | |
194 | THREAD_OFF(up->t_rs_timer); | |
195 | THREAD_OFF(up->t_msdp_reg_timer); | |
196 | ||
197 | if (up->join_state == PIM_UPSTREAM_JOINED) { | |
198 | pim_jp_agg_single_upstream_send(&up->rpf, up, 0); | |
199 | ||
200 | if (up->sg.src.s_addr == INADDR_ANY) { | |
201 | /* if a (*, G) entry in the joined state is being | |
202 | * deleted we | |
203 | * need to notify MSDP */ | |
204 | notify_msdp = true; | |
205 | } | |
206 | } | |
207 | ||
208 | join_timer_stop(up); | |
209 | pim_jp_agg_upstream_verification(up, false); | |
210 | up->rpf.source_nexthop.interface = NULL; | |
211 | ||
212 | if (up->sg.src.s_addr != INADDR_ANY) { | |
391b8b08 DS |
213 | if (pim->upstream_sg_wheel) |
214 | wheel_remove_item(pim->upstream_sg_wheel, up); | |
d62a17ae | 215 | notify_msdp = true; |
216 | } | |
217 | ||
d62a17ae | 218 | pim_mroute_del(up->channel_oil, __PRETTY_FUNCTION__); |
219 | upstream_channel_oil_detach(up); | |
220 | ||
7692c5ae DS |
221 | for (ALL_LIST_ELEMENTS(up->ifchannels, node, nnode, ch)) |
222 | pim_ifchannel_delete(ch); | |
6a154c88 | 223 | list_delete(&up->ifchannels); |
d62a17ae | 224 | |
7692c5ae DS |
225 | pim_upstream_remove_children(pim, up); |
226 | if (up->sources) | |
6a154c88 | 227 | list_delete(&up->sources); |
7692c5ae | 228 | |
d62a17ae | 229 | if (up->parent && up->parent->sources) |
230 | listnode_delete(up->parent->sources, up); | |
231 | up->parent = NULL; | |
232 | ||
9b29ea95 DS |
233 | listnode_delete(pim->upstream_list, up); |
234 | hash_release(pim->upstream_hash, up); | |
d62a17ae | 235 | |
236 | if (notify_msdp) { | |
472ad383 | 237 | pim_msdp_up_del(pim, &up->sg); |
d62a17ae | 238 | } |
239 | ||
246445a3 SP |
240 | /* When RP gets deleted, pim_rp_del() deregister addr with Zebra NHT |
241 | * and assign up->upstream_addr as INADDR_ANY. | |
242 | * So before de-registering the upstream address, check if is not equal | |
243 | * to INADDR_ANY. This is done in order to avoid de-registering for | |
244 | * 255.255.255.255 which is maintained for some reason.. | |
245 | */ | |
246 | if (up->upstream_addr.s_addr != INADDR_ANY) { | |
247 | /* Deregister addr with Zebra NHT */ | |
248 | nht_p.family = AF_INET; | |
249 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
250 | nht_p.u.prefix4 = up->upstream_addr; | |
23fc858a | 251 | if (PIM_DEBUG_PIM_TRACE) { |
246445a3 SP |
252 | char buf[PREFIX2STR_BUFFER]; |
253 | prefix2str(&nht_p, buf, sizeof(buf)); | |
254 | zlog_debug("%s: Deregister upstream %s addr %s with Zebra NHT", | |
255 | __PRETTY_FUNCTION__, up->sg_str, buf); | |
256 | } | |
4533b847 | 257 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL, false); |
d62a17ae | 258 | } |
d62a17ae | 259 | |
172e45dc | 260 | XFREE(MTYPE_PIM_UPSTREAM, up); |
d62a17ae | 261 | |
262 | return NULL; | |
12e41d03 DL |
263 | } |
264 | ||
d62a17ae | 265 | void pim_upstream_send_join(struct pim_upstream *up) |
12e41d03 | 266 | { |
957d93ea | 267 | if (!up->rpf.source_nexthop.interface) { |
23fc858a | 268 | if (PIM_DEBUG_PIM_TRACE) |
957d93ea SP |
269 | zlog_debug("%s: up %s RPF is not present", |
270 | __PRETTY_FUNCTION__, up->sg_str); | |
271 | return; | |
272 | } | |
273 | ||
23fc858a | 274 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 275 | char rpf_str[PREFIX_STRLEN]; |
276 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, | |
277 | sizeof(rpf_str)); | |
278 | zlog_debug("%s: RPF'%s=%s(%s) for Interface %s", | |
279 | __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
280 | pim_upstream_state2str(up->join_state), | |
281 | up->rpf.source_nexthop.interface->name); | |
282 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
283 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", | |
284 | __PRETTY_FUNCTION__, up->sg_str, rpf_str); | |
285 | /* warning only */ | |
286 | } | |
287 | } | |
288 | ||
289 | /* send Join(S,G) to the current upstream neighbor */ | |
290 | pim_jp_agg_single_upstream_send(&up->rpf, up, 1 /* join */); | |
12e41d03 DL |
291 | } |
292 | ||
293 | static int on_join_timer(struct thread *t) | |
294 | { | |
d62a17ae | 295 | struct pim_upstream *up; |
12e41d03 | 296 | |
d62a17ae | 297 | up = THREAD_ARG(t); |
12e41d03 | 298 | |
957d93ea | 299 | if (!up->rpf.source_nexthop.interface) { |
23fc858a | 300 | if (PIM_DEBUG_PIM_TRACE) |
957d93ea SP |
301 | zlog_debug("%s: up %s RPF is not present", |
302 | __PRETTY_FUNCTION__, up->sg_str); | |
303 | return 0; | |
304 | } | |
305 | ||
d62a17ae | 306 | /* |
307 | * In the case of a HFR we will not ahve anyone to send this to. | |
308 | */ | |
309 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) | |
310 | return 0; | |
bb6e291f | 311 | |
d62a17ae | 312 | /* |
313 | * Don't send the join if the outgoing interface is a loopback | |
314 | * But since this might change leave the join timer running | |
315 | */ | |
316 | if (up->rpf.source_nexthop | |
317 | .interface && !if_is_loopback(up->rpf.source_nexthop.interface)) | |
318 | pim_upstream_send_join(up); | |
12e41d03 | 319 | |
d62a17ae | 320 | join_timer_start(up); |
12e41d03 | 321 | |
d62a17ae | 322 | return 0; |
12e41d03 DL |
323 | } |
324 | ||
982bff89 | 325 | static void join_timer_stop(struct pim_upstream *up) |
12e41d03 | 326 | { |
47e3ce59 | 327 | struct pim_neighbor *nbr = NULL; |
957d93ea | 328 | |
d62a17ae | 329 | THREAD_OFF(up->t_join_timer); |
7eb90689 | 330 | |
47e3ce59 SP |
331 | if (up->rpf.source_nexthop.interface) |
332 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, | |
333 | up->rpf.rpf_addr.u.prefix4); | |
982bff89 | 334 | |
d62a17ae | 335 | if (nbr) |
336 | pim_jp_agg_remove_group(nbr->upstream_jp_agg, up); | |
982bff89 | 337 | |
d62a17ae | 338 | pim_jp_agg_upstream_verification(up, false); |
982bff89 DS |
339 | } |
340 | ||
d62a17ae | 341 | void join_timer_start(struct pim_upstream *up) |
982bff89 | 342 | { |
d62a17ae | 343 | struct pim_neighbor *nbr = NULL; |
344 | ||
345 | if (up->rpf.source_nexthop.interface) { | |
346 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, | |
347 | up->rpf.rpf_addr.u.prefix4); | |
348 | ||
349 | if (PIM_DEBUG_PIM_EVENTS) { | |
350 | zlog_debug( | |
351 | "%s: starting %d sec timer for upstream (S,G)=%s", | |
5b45753e | 352 | __PRETTY_FUNCTION__, router->t_periodic, |
d62a17ae | 353 | up->sg_str); |
354 | } | |
355 | } | |
356 | ||
357 | if (nbr) | |
358 | pim_jp_agg_add_group(nbr->upstream_jp_agg, up, 1); | |
359 | else { | |
360 | THREAD_OFF(up->t_join_timer); | |
36417fcc | 361 | thread_add_timer(router->master, on_join_timer, up, |
5b45753e | 362 | router->t_periodic, &up->t_join_timer); |
d62a17ae | 363 | } |
364 | pim_jp_agg_upstream_verification(up, true); | |
12e41d03 DL |
365 | } |
366 | ||
982bff89 DS |
367 | /* |
368 | * This is only called when we are switching the upstream | |
369 | * J/P from one neighbor to another | |
370 | * | |
371 | * As such we need to remove from the old list and | |
372 | * add to the new list. | |
373 | */ | |
d62a17ae | 374 | void pim_upstream_join_timer_restart(struct pim_upstream *up, |
375 | struct pim_rpf *old) | |
12e41d03 | 376 | { |
d62a17ae | 377 | // THREAD_OFF(up->t_join_timer); |
378 | join_timer_start(up); | |
12e41d03 DL |
379 | } |
380 | ||
381 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
382 | int interval_msec) | |
383 | { | |
d62a17ae | 384 | if (PIM_DEBUG_PIM_EVENTS) { |
385 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", | |
386 | __PRETTY_FUNCTION__, interval_msec, up->sg_str); | |
387 | } | |
388 | ||
389 | THREAD_OFF(up->t_join_timer); | |
36417fcc | 390 | thread_add_timer_msec(router->master, on_join_timer, up, interval_msec, |
d62a17ae | 391 | &up->t_join_timer); |
12e41d03 DL |
392 | } |
393 | ||
394 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
d62a17ae | 395 | struct in_addr rpf_addr, int holdtime) |
12e41d03 | 396 | { |
d62a17ae | 397 | long t_joinsuppress_msec; |
398 | long join_timer_remain_msec; | |
399 | ||
957d93ea | 400 | if (!up->rpf.source_nexthop.interface) { |
23fc858a | 401 | if (PIM_DEBUG_PIM_TRACE) |
957d93ea SP |
402 | zlog_debug("%s: up %s RPF is not present", |
403 | __PRETTY_FUNCTION__, up->sg_str); | |
404 | return; | |
405 | } | |
406 | ||
d62a17ae | 407 | t_joinsuppress_msec = |
408 | MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
409 | 1000 * holdtime); | |
410 | ||
411 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
412 | ||
23fc858a | 413 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 414 | char rpf_str[INET_ADDRSTRLEN]; |
415 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); | |
416 | zlog_debug( | |
417 | "%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", | |
418 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
419 | join_timer_remain_msec, t_joinsuppress_msec); | |
420 | } | |
421 | ||
422 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
23fc858a | 423 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 424 | zlog_debug( |
425 | "%s %s: suppressing Join(S,G)=%s for %ld msec", | |
426 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, | |
427 | t_joinsuppress_msec); | |
428 | } | |
429 | ||
430 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
431 | } | |
12e41d03 DL |
432 | } |
433 | ||
434 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
d62a17ae | 435 | struct pim_upstream *up) |
12e41d03 | 436 | { |
d62a17ae | 437 | long join_timer_remain_msec; |
438 | int t_override_msec; | |
439 | ||
957d93ea | 440 | if (!up->rpf.source_nexthop.interface) { |
23fc858a | 441 | if (PIM_DEBUG_PIM_TRACE) |
957d93ea SP |
442 | zlog_debug("%s: up %s RPF is not present", |
443 | __PRETTY_FUNCTION__, up->sg_str); | |
444 | return; | |
445 | } | |
446 | ||
d62a17ae | 447 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); |
448 | t_override_msec = | |
449 | pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
450 | ||
23fc858a | 451 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 452 | char rpf_str[INET_ADDRSTRLEN]; |
453 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr.u.prefix4, rpf_str, | |
454 | sizeof(rpf_str)); | |
455 | zlog_debug( | |
456 | "%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", | |
457 | debug_label, up->sg_str, rpf_str, | |
458 | join_timer_remain_msec, t_override_msec); | |
459 | } | |
460 | ||
461 | if (join_timer_remain_msec > t_override_msec) { | |
23fc858a | 462 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 463 | zlog_debug( |
464 | "%s: decreasing (S,G)=%s join timer to t_override=%d msec", | |
465 | debug_label, up->sg_str, t_override_msec); | |
466 | } | |
467 | ||
468 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
469 | } | |
12e41d03 DL |
470 | } |
471 | ||
472 | static void forward_on(struct pim_upstream *up) | |
473 | { | |
d62a17ae | 474 | struct listnode *chnode; |
475 | struct listnode *chnextnode; | |
476 | struct pim_ifchannel *ch = NULL; | |
12e41d03 | 477 | |
d62a17ae | 478 | /* scan (S,G) state */ |
479 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
480 | if (pim_macro_chisin_oiflist(ch)) | |
481 | pim_forward_start(ch); | |
12e41d03 | 482 | |
d62a17ae | 483 | } /* scan iface channel list */ |
12e41d03 DL |
484 | } |
485 | ||
486 | static void forward_off(struct pim_upstream *up) | |
487 | { | |
d62a17ae | 488 | struct listnode *chnode; |
489 | struct listnode *chnextnode; | |
490 | struct pim_ifchannel *ch; | |
12e41d03 | 491 | |
d62a17ae | 492 | /* scan per-interface (S,G) state */ |
493 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
12e41d03 | 494 | |
aabb9a2f | 495 | pim_forward_stop(ch, false); |
12e41d03 | 496 | |
d62a17ae | 497 | } /* scan iface channel list */ |
12e41d03 DL |
498 | } |
499 | ||
d62a17ae | 500 | static int pim_upstream_could_register(struct pim_upstream *up) |
bb6e291f | 501 | { |
d62a17ae | 502 | struct pim_interface *pim_ifp = NULL; |
503 | ||
8eeaef9b AK |
504 | /* FORCE_PIMREG is a generic flag to let an app like VxLAN-AA register |
505 | * a source on an upstream entry even if the source is not directly | |
506 | * connected on the IIF. | |
507 | */ | |
508 | if (PIM_UPSTREAM_FLAG_TEST_FORCE_PIMREG(up->flags)) | |
509 | return 1; | |
510 | ||
d62a17ae | 511 | if (up->rpf.source_nexthop.interface) |
512 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
513 | else { | |
23fc858a | 514 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 515 | zlog_debug("%s: up %s RPF is not present", |
516 | __PRETTY_FUNCTION__, up->sg_str); | |
517 | } | |
bb6e291f | 518 | |
d62a17ae | 519 | if (pim_ifp && PIM_I_am_DR(pim_ifp) |
520 | && pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
521 | up->sg.src)) | |
522 | return 1; | |
bb6e291f | 523 | |
d62a17ae | 524 | return 0; |
bb6e291f DS |
525 | } |
526 | ||
0437e105 | 527 | /* Source registration is suppressed for SSM groups. When the SSM range changes |
15a5dafe | 528 | * we re-revaluate register setup for existing upstream entries */ |
9b29ea95 | 529 | void pim_upstream_register_reevaluate(struct pim_instance *pim) |
15a5dafe | 530 | { |
d62a17ae | 531 | struct listnode *upnode; |
532 | struct pim_upstream *up; | |
533 | ||
9b29ea95 | 534 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
d62a17ae | 535 | /* If FHR is set CouldRegister is True. Also check if the flow |
536 | * is actually active; if it is not kat setup will trigger | |
537 | * source | |
538 | * registration whenever the flow becomes active. */ | |
539 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) || !up->t_ka_timer) | |
540 | continue; | |
541 | ||
6f439a70 | 542 | if (pim_is_grp_ssm(pim, up->sg.grp)) { |
d62a17ae | 543 | /* clear the register state for SSM groups */ |
544 | if (up->reg_state != PIM_REG_NOINFO) { | |
545 | if (PIM_DEBUG_PIM_EVENTS) | |
546 | zlog_debug( | |
547 | "Clear register for %s as G is now SSM", | |
548 | up->sg_str); | |
549 | /* remove regiface from the OIL if it is there*/ | |
550 | pim_channel_del_oif(up->channel_oil, | |
9b29ea95 | 551 | pim->regiface, |
1b249e70 AK |
552 | PIM_OIF_FLAG_PROTO_PIM, |
553 | __func__); | |
d62a17ae | 554 | up->reg_state = PIM_REG_NOINFO; |
555 | } | |
556 | } else { | |
557 | /* register ASM sources with the RP */ | |
558 | if (up->reg_state == PIM_REG_NOINFO) { | |
559 | if (PIM_DEBUG_PIM_EVENTS) | |
560 | zlog_debug( | |
561 | "Register %s as G is now ASM", | |
562 | up->sg_str); | |
563 | pim_channel_add_oif(up->channel_oil, | |
9b29ea95 | 564 | pim->regiface, |
1b249e70 AK |
565 | PIM_OIF_FLAG_PROTO_PIM, |
566 | __func__); | |
d62a17ae | 567 | up->reg_state = PIM_REG_JOIN; |
568 | } | |
569 | } | |
570 | } | |
15a5dafe | 571 | } |
572 | ||
69e3538c AK |
573 | /* RFC7761, Section 4.2 “Data Packet Forwarding Rules” says we should |
574 | * forward a S - | |
575 | * 1. along the SPT if SPTbit is set | |
576 | * 2. and along the RPT if SPTbit is not set | |
577 | * If forwarding is hw accelerated i.e. control and dataplane components | |
578 | * are separate you may not be able to reliably set SPT bit on intermediate | |
579 | * routers while still fowarding on the (S,G,rpt). | |
580 | * | |
581 | * This macro is a slight deviation on the RFC and uses "traffic-agnostic" | |
582 | * criteria to decide between using the RPT vs. SPT for forwarding. | |
583 | */ | |
584 | void pim_upstream_update_use_rpt(struct pim_upstream *up, | |
585 | bool update_mroute) | |
586 | { | |
587 | bool old_use_rpt; | |
588 | bool new_use_rpt; | |
589 | ||
590 | if (up->sg.src.s_addr == INADDR_ANY) | |
591 | return; | |
592 | ||
593 | old_use_rpt = !!PIM_UPSTREAM_FLAG_TEST_USE_RPT(up->flags); | |
594 | ||
595 | /* We will use the SPT (IIF=RPF_interface(S) if - | |
596 | * 1. We have decided to join the SPT | |
597 | * 2. We are FHR | |
598 | * 3. Source is directly connected | |
599 | * 4. We are RP (parent's IIF is lo or vrf-device) | |
600 | * In all other cases the source will stay along the RPT and | |
601 | * IIF=RPF_interface(RP). | |
602 | */ | |
603 | if (up->join_state == PIM_UPSTREAM_JOINED || | |
604 | PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) || | |
605 | pim_if_connected_to_source( | |
606 | up->rpf.source_nexthop.interface, | |
607 | up->sg.src) || | |
608 | /* XXX - need to switch this to a more efficient | |
609 | * lookup API | |
610 | */ | |
611 | I_am_RP(up->pim, up->sg.grp)) | |
612 | /* use SPT */ | |
613 | PIM_UPSTREAM_FLAG_UNSET_USE_RPT(up->flags); | |
614 | else | |
615 | /* use RPT */ | |
616 | PIM_UPSTREAM_FLAG_SET_USE_RPT(up->flags); | |
617 | ||
618 | new_use_rpt = !!PIM_UPSTREAM_FLAG_TEST_USE_RPT(up->flags); | |
619 | if (old_use_rpt != new_use_rpt) { | |
620 | if (PIM_DEBUG_PIM_EVENTS) | |
621 | zlog_debug("%s switched from %s to %s", | |
622 | up->sg_str, | |
623 | old_use_rpt?"RPT":"SPT", | |
624 | new_use_rpt?"RPT":"SPT"); | |
625 | if (update_mroute) | |
626 | pim_upstream_mroute_add(up->channel_oil, __func__); | |
627 | } | |
628 | } | |
629 | ||
a749b900 AK |
630 | /* some events like RP change require re-evaluation of SGrpt across |
631 | * all groups | |
632 | */ | |
633 | void pim_upstream_reeval_use_rpt(struct pim_instance *pim) | |
634 | { | |
635 | struct pim_upstream *up; | |
636 | struct listnode *node; | |
637 | ||
638 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { | |
639 | if (up->sg.src.s_addr == INADDR_ANY) | |
640 | continue; | |
641 | ||
642 | pim_upstream_update_use_rpt(up, true /*update_mroute*/); | |
643 | } | |
644 | } | |
645 | ||
1eca8576 | 646 | void pim_upstream_switch(struct pim_instance *pim, struct pim_upstream *up, |
d62a17ae | 647 | enum pim_upstream_state new_state) |
12e41d03 | 648 | { |
d62a17ae | 649 | enum pim_upstream_state old_state = up->join_state; |
650 | ||
957d93ea | 651 | if (up->upstream_addr.s_addr == INADDR_ANY) { |
47e3ce59 SP |
652 | if (PIM_DEBUG_PIM_EVENTS) |
653 | zlog_debug("%s: RPF not configured for %s", | |
654 | __PRETTY_FUNCTION__, up->sg_str); | |
957d93ea SP |
655 | return; |
656 | } | |
657 | ||
658 | if (!up->rpf.source_nexthop.interface) { | |
47e3ce59 SP |
659 | if (PIM_DEBUG_PIM_EVENTS) |
660 | zlog_debug("%s: RP not reachable for %s", | |
661 | __PRETTY_FUNCTION__, up->sg_str); | |
957d93ea SP |
662 | return; |
663 | } | |
664 | ||
d62a17ae | 665 | if (PIM_DEBUG_PIM_EVENTS) { |
666 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", | |
667 | __PRETTY_FUNCTION__, up->sg_str, | |
668 | pim_upstream_state2str(up->join_state), | |
669 | pim_upstream_state2str(new_state)); | |
670 | } | |
671 | ||
672 | up->join_state = new_state; | |
673 | if (old_state != new_state) | |
674 | up->state_transition = pim_time_monotonic_sec(); | |
675 | ||
676 | pim_upstream_update_assert_tracking_desired(up); | |
677 | ||
678 | if (new_state == PIM_UPSTREAM_JOINED) { | |
b077f571 | 679 | pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 680 | if (old_state != PIM_UPSTREAM_JOINED) { |
681 | int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags); | |
b077f571 | 682 | |
1eca8576 | 683 | pim_msdp_up_join_state_changed(pim, up); |
d62a17ae | 684 | if (pim_upstream_could_register(up)) { |
685 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
686 | if (!old_fhr | |
687 | && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM( | |
688 | up->flags)) { | |
689 | pim_upstream_keep_alive_timer_start( | |
19b807ca | 690 | up, pim->keep_alive_time); |
d62a17ae | 691 | pim_register_join(up); |
692 | } | |
693 | } else { | |
694 | pim_upstream_send_join(up); | |
695 | join_timer_start(up); | |
696 | } | |
d62a17ae | 697 | } |
698 | } else { | |
699 | ||
700 | forward_off(up); | |
701 | if (old_state == PIM_UPSTREAM_JOINED) | |
1eca8576 | 702 | pim_msdp_up_join_state_changed(pim, up); |
d62a17ae | 703 | |
704 | /* IHR, Trigger SGRpt on *,G IIF to prune S,G from RPT towards | |
705 | RP. | |
706 | If I am RP for G then send S,G prune to its IIF. */ | |
707 | if (pim_upstream_is_sg_rpt(up) && up->parent | |
1eca8576 | 708 | && !I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 709 | if (PIM_DEBUG_PIM_TRACE_DETAIL) |
710 | zlog_debug( | |
957d93ea SP |
711 | "%s: *,G IIF %s S,G IIF %s ", |
712 | __PRETTY_FUNCTION__, | |
713 | up->parent->rpf.source_nexthop.interface ? | |
714 | up->parent->rpf.source_nexthop.interface->name | |
715 | : "Unknown", | |
716 | up->rpf.source_nexthop.interface ? | |
717 | up->rpf.source_nexthop.interface->name : | |
718 | "Unknown"); | |
d62a17ae | 719 | pim_jp_agg_single_upstream_send(&up->parent->rpf, |
720 | up->parent, | |
721 | 1 /* (W,G) Join */); | |
722 | } else | |
723 | pim_jp_agg_single_upstream_send(&up->rpf, up, | |
724 | 0 /* prune */); | |
725 | join_timer_stop(up); | |
726 | } | |
69e3538c AK |
727 | |
728 | if (old_state != new_state) | |
729 | pim_upstream_update_use_rpt(up, true /*update_mroute*/); | |
12e41d03 DL |
730 | } |
731 | ||
d62a17ae | 732 | int pim_upstream_compare(void *arg1, void *arg2) |
03417ccd | 733 | { |
d62a17ae | 734 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
735 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
03417ccd | 736 | |
d62a17ae | 737 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) |
738 | return -1; | |
03417ccd | 739 | |
d62a17ae | 740 | if (ntohl(up1->sg.grp.s_addr) > ntohl(up2->sg.grp.s_addr)) |
741 | return 1; | |
03417ccd | 742 | |
d62a17ae | 743 | if (ntohl(up1->sg.src.s_addr) < ntohl(up2->sg.src.s_addr)) |
744 | return -1; | |
03417ccd | 745 | |
d62a17ae | 746 | if (ntohl(up1->sg.src.s_addr) > ntohl(up2->sg.src.s_addr)) |
747 | return 1; | |
03417ccd | 748 | |
d62a17ae | 749 | return 0; |
03417ccd DS |
750 | } |
751 | ||
6a5de0ad AK |
752 | void pim_upstream_fill_static_iif(struct pim_upstream *up, |
753 | struct interface *incoming) | |
754 | { | |
755 | up->rpf.source_nexthop.interface = incoming; | |
756 | ||
757 | /* reset other parameters to matched a connected incoming interface */ | |
758 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; | |
759 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = | |
760 | PIM_NET_INADDR_ANY; | |
761 | up->rpf.source_nexthop.mrib_metric_preference = | |
762 | ZEBRA_CONNECT_DISTANCE_DEFAULT; | |
763 | up->rpf.source_nexthop.mrib_route_metric = 0; | |
764 | up->rpf.rpf_addr.family = AF_INET; | |
765 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
766 | ||
767 | } | |
768 | ||
2002dcdb DS |
769 | static struct pim_upstream *pim_upstream_new(struct pim_instance *pim, |
770 | struct prefix_sg *sg, | |
771 | struct interface *incoming, | |
0885a9f1 DS |
772 | int flags, |
773 | struct pim_ifchannel *ch) | |
12e41d03 | 774 | { |
d62a17ae | 775 | enum pim_rpf_result rpf_result; |
776 | struct pim_interface *pim_ifp; | |
777 | struct pim_upstream *up; | |
778 | ||
779 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); | |
d62a17ae | 780 | |
69e3538c | 781 | up->pim = pim; |
d62a17ae | 782 | up->sg = *sg; |
783 | pim_str_sg_set(sg, up->sg_str); | |
0885a9f1 DS |
784 | if (ch) |
785 | ch->upstream = up; | |
786 | ||
9b29ea95 | 787 | up = hash_get(pim->upstream_hash, up, hash_alloc_intern); |
732c209c SP |
788 | /* Set up->upstream_addr as INADDR_ANY, if RP is not |
789 | * configured and retain the upstream data structure | |
790 | */ | |
d9c9a9ee DS |
791 | if (!pim_rp_set_upstream_addr(pim, &up->upstream_addr, sg->src, |
792 | sg->grp)) { | |
23fc858a | 793 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 794 | zlog_debug("%s: Received a (*,G) with no RP configured", |
795 | __PRETTY_FUNCTION__); | |
d62a17ae | 796 | } |
797 | ||
9b29ea95 | 798 | up->parent = pim_upstream_find_parent(pim, up); |
d62a17ae | 799 | if (up->sg.src.s_addr == INADDR_ANY) { |
800 | up->sources = list_new(); | |
801 | up->sources->cmp = pim_upstream_compare; | |
802 | } else | |
803 | up->sources = NULL; | |
804 | ||
9b29ea95 | 805 | pim_upstream_find_new_children(pim, up); |
d62a17ae | 806 | up->flags = flags; |
807 | up->ref_count = 1; | |
808 | up->t_join_timer = NULL; | |
809 | up->t_ka_timer = NULL; | |
810 | up->t_rs_timer = NULL; | |
811 | up->t_msdp_reg_timer = NULL; | |
812 | up->join_state = PIM_UPSTREAM_NOTJOINED; | |
813 | up->reg_state = PIM_REG_NOINFO; | |
814 | up->state_transition = pim_time_monotonic_sec(); | |
46dd6edb | 815 | up->channel_oil = |
7984af18 | 816 | pim_channel_oil_add(pim, &up->sg, __PRETTY_FUNCTION__); |
d62a17ae | 817 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; |
818 | ||
819 | up->rpf.source_nexthop.interface = NULL; | |
820 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; | |
821 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = | |
822 | PIM_NET_INADDR_ANY; | |
823 | up->rpf.source_nexthop.mrib_metric_preference = | |
d17612dd | 824 | router->infinite_assert_metric.metric_preference; |
d62a17ae | 825 | up->rpf.source_nexthop.mrib_route_metric = |
d17612dd | 826 | router->infinite_assert_metric.route_metric; |
d62a17ae | 827 | up->rpf.rpf_addr.family = AF_INET; |
828 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
829 | ||
830 | up->ifchannels = list_new(); | |
831 | up->ifchannels->cmp = (int (*)(void *, void *))pim_ifchannel_compare; | |
832 | ||
833 | if (up->sg.src.s_addr != INADDR_ANY) | |
9b29ea95 | 834 | wheel_add_item(pim->upstream_sg_wheel, up); |
d62a17ae | 835 | |
02434c43 DS |
836 | if (PIM_UPSTREAM_FLAG_TEST_STATIC_IIF(up->flags) |
837 | || PIM_UPSTREAM_FLAG_TEST_SRC_NOCACHE(up->flags)) { | |
6a5de0ad AK |
838 | pim_upstream_fill_static_iif(up, incoming); |
839 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
840 | assert(pim_ifp); | |
7984af18 | 841 | pim_upstream_mroute_iif_update(up->channel_oil, __func__); |
02434c43 DS |
842 | |
843 | if (PIM_UPSTREAM_FLAG_TEST_SRC_NOCACHE(up->flags)) | |
844 | pim_upstream_keep_alive_timer_start( | |
845 | up, pim->keep_alive_time); | |
46dd6edb | 846 | } else if (up->upstream_addr.s_addr != INADDR_ANY) { |
ae14da48 | 847 | rpf_result = pim_rpf_update(pim, up, NULL); |
732c209c | 848 | if (rpf_result == PIM_RPF_FAILURE) { |
23fc858a | 849 | if (PIM_DEBUG_PIM_TRACE) |
732c209c SP |
850 | zlog_debug( |
851 | "%s: Attempting to create upstream(%s), Unable to RPF for source", | |
852 | __PRETTY_FUNCTION__, up->sg_str); | |
d62a17ae | 853 | } |
854 | ||
732c209c SP |
855 | if (up->rpf.source_nexthop.interface) { |
856 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
857 | if (pim_ifp) | |
7984af18 AK |
858 | pim_upstream_mroute_iif_update(up->channel_oil, |
859 | __func__); | |
732c209c | 860 | } |
69e3538c AK |
861 | pim_upstream_update_use_rpt(up, |
862 | false /*update_mroute*/); | |
d62a17ae | 863 | } |
864 | ||
9b29ea95 | 865 | listnode_add_sort(pim->upstream_list, up); |
d62a17ae | 866 | |
23fc858a | 867 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 868 | zlog_debug( |
869 | "%s: Created Upstream %s upstream_addr %s ref count %d increment", | |
870 | __PRETTY_FUNCTION__, up->sg_str, | |
871 | inet_ntoa(up->upstream_addr), up->ref_count); | |
872 | } | |
873 | ||
874 | return up; | |
12e41d03 DL |
875 | } |
876 | ||
9b29ea95 DS |
877 | struct pim_upstream *pim_upstream_find(struct pim_instance *pim, |
878 | struct prefix_sg *sg) | |
12e41d03 | 879 | { |
d62a17ae | 880 | struct pim_upstream lookup; |
881 | struct pim_upstream *up = NULL; | |
12e41d03 | 882 | |
d62a17ae | 883 | lookup.sg = *sg; |
9b29ea95 | 884 | up = hash_lookup(pim->upstream_hash, &lookup); |
d62a17ae | 885 | return up; |
12e41d03 DL |
886 | } |
887 | ||
d62a17ae | 888 | struct pim_upstream *pim_upstream_find_or_add(struct prefix_sg *sg, |
69e3538c AK |
889 | struct interface *incoming, |
890 | int flags, const char *name) | |
e711cd3c | 891 | { |
69e3538c | 892 | struct pim_interface *pim_ifp = incoming->info; |
d62a17ae | 893 | |
69e3538c AK |
894 | return (pim_upstream_add(pim_ifp->pim, sg, incoming, flags, name, |
895 | NULL)); | |
e711cd3c DS |
896 | } |
897 | ||
d62a17ae | 898 | void pim_upstream_ref(struct pim_upstream *up, int flags, const char *name) |
1bf16443 | 899 | { |
69e3538c AK |
900 | /* when we go from non-FHR to FHR we need to re-eval traffic |
901 | * forwarding path | |
902 | */ | |
903 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) && | |
904 | PIM_UPSTREAM_FLAG_TEST_FHR(flags)) { | |
905 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
906 | pim_upstream_update_use_rpt(up, true /*update_mroute*/); | |
907 | } | |
908 | ||
d62a17ae | 909 | up->flags |= flags; |
910 | ++up->ref_count; | |
23fc858a | 911 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 912 | zlog_debug("%s(%s): upstream %s ref count %d increment", |
913 | __PRETTY_FUNCTION__, name, up->sg_str, | |
914 | up->ref_count); | |
1bf16443 | 915 | } |
916 | ||
2002dcdb DS |
917 | struct pim_upstream *pim_upstream_add(struct pim_instance *pim, |
918 | struct prefix_sg *sg, | |
d62a17ae | 919 | struct interface *incoming, int flags, |
0885a9f1 DS |
920 | const char *name, |
921 | struct pim_ifchannel *ch) | |
12e41d03 | 922 | { |
d62a17ae | 923 | struct pim_upstream *up = NULL; |
924 | int found = 0; | |
9b29ea95 | 925 | |
2002dcdb | 926 | up = pim_upstream_find(pim, sg); |
d62a17ae | 927 | if (up) { |
928 | pim_upstream_ref(up, flags, name); | |
929 | found = 1; | |
930 | } else { | |
0885a9f1 | 931 | up = pim_upstream_new(pim, sg, incoming, flags, ch); |
d62a17ae | 932 | } |
933 | ||
23fc858a | 934 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 935 | if (up) { |
936 | char buf[PREFIX2STR_BUFFER]; | |
937 | prefix2str(&up->rpf.rpf_addr, buf, sizeof(buf)); | |
938 | zlog_debug("%s(%s): %s, iif %s (%s) found: %d: ref_count: %d", | |
f4075cb4 | 939 | __PRETTY_FUNCTION__, name, |
55785900 | 940 | up->sg_str, buf, up->rpf.source_nexthop.interface ? |
957d93ea | 941 | up->rpf.source_nexthop.interface->name : "Unknown" , |
55785900 | 942 | found, up->ref_count); |
d62a17ae | 943 | } else |
944 | zlog_debug("%s(%s): (%s) failure to create", | |
945 | __PRETTY_FUNCTION__, name, | |
946 | pim_str_sg_dump(sg)); | |
947 | } | |
12e41d03 | 948 | |
d62a17ae | 949 | return up; |
12e41d03 DL |
950 | } |
951 | ||
a53a9b3e AK |
952 | /* |
953 | * Passed in up must be the upstream for ch. starch is NULL if no | |
954 | * information | |
955 | * This function is copied over from | |
956 | * pim_upstream_evaluate_join_desired_interface but limited to | |
957 | * parent (*,G)'s includes/joins. | |
958 | */ | |
959 | int pim_upstream_eval_inherit_if(struct pim_upstream *up, | |
960 | struct pim_ifchannel *ch, | |
961 | struct pim_ifchannel *starch) | |
962 | { | |
963 | /* if there is an explicit prune for this interface we cannot | |
964 | * add it to the OIL | |
965 | */ | |
966 | if (ch) { | |
967 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
968 | return 0; | |
969 | } | |
970 | ||
971 | /* Check if the OIF can be inherited fron the (*,G) entry | |
972 | */ | |
973 | if (starch) { | |
974 | if (!pim_macro_ch_lost_assert(starch) | |
975 | && pim_macro_chisin_joins_or_include(starch)) | |
976 | return 1; | |
977 | } | |
978 | ||
979 | return 0; | |
980 | } | |
981 | ||
c8fc07cb DS |
982 | /* |
983 | * Passed in up must be the upstream for ch. starch is NULL if no | |
984 | * information | |
985 | */ | |
d62a17ae | 986 | int pim_upstream_evaluate_join_desired_interface(struct pim_upstream *up, |
987 | struct pim_ifchannel *ch, | |
988 | struct pim_ifchannel *starch) | |
7a3ddda5 | 989 | { |
d62a17ae | 990 | if (ch) { |
991 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
992 | return 0; | |
993 | ||
994 | if (!pim_macro_ch_lost_assert(ch) | |
995 | && pim_macro_chisin_joins_or_include(ch)) | |
996 | return 1; | |
997 | } | |
998 | ||
999 | /* | |
1000 | * joins (*,G) | |
1001 | */ | |
1002 | if (starch) { | |
a53a9b3e AK |
1003 | /* XXX: check on this with donald |
1004 | * we are looking for PIM_IF_FLAG_MASK_S_G_RPT in | |
1005 | * upstream flags? | |
1006 | */ | |
1007 | #if 0 | |
d62a17ae | 1008 | if (PIM_IF_FLAG_TEST_S_G_RPT(starch->upstream->flags)) |
1009 | return 0; | |
a53a9b3e | 1010 | #endif |
d62a17ae | 1011 | |
1012 | if (!pim_macro_ch_lost_assert(starch) | |
1013 | && pim_macro_chisin_joins_or_include(starch)) | |
1014 | return 1; | |
1015 | } | |
1016 | ||
1017 | return 0; | |
7a3ddda5 DS |
1018 | } |
1019 | ||
a53a9b3e AK |
1020 | /* Returns true if immediate OIL is empty and is used to evaluate |
1021 | * JoinDesired. See pim_upstream_evaluate_join_desired. | |
12e41d03 | 1022 | */ |
a53a9b3e | 1023 | static bool pim_upstream_empty_immediate_olist(struct pim_instance *pim, |
9b29ea95 | 1024 | struct pim_upstream *up) |
12e41d03 | 1025 | { |
d62a17ae | 1026 | struct interface *ifp; |
a53a9b3e | 1027 | struct pim_ifchannel *ch; |
12e41d03 | 1028 | |
451fda4f | 1029 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
d62a17ae | 1030 | if (!ifp->info) |
1031 | continue; | |
c8fc07cb | 1032 | |
d62a17ae | 1033 | ch = pim_ifchannel_find(ifp, &up->sg); |
a53a9b3e | 1034 | if (!ch) |
d62a17ae | 1035 | continue; |
12e41d03 | 1036 | |
a53a9b3e AK |
1037 | /* If we have even one immediate OIF we can return with |
1038 | * not-empty | |
1039 | */ | |
1040 | if (pim_upstream_evaluate_join_desired_interface(up, ch, | |
1041 | NULL /* starch */)) | |
1042 | return false; | |
d62a17ae | 1043 | } /* scan iface channel list */ |
12e41d03 | 1044 | |
a53a9b3e AK |
1045 | /* immediate_oil is empty */ |
1046 | return true; | |
1047 | } | |
1048 | ||
1049 | static bool pim_upstream_is_kat_running(struct pim_upstream *up) | |
1050 | { | |
1051 | return (up->t_ka_timer != NULL); | |
1052 | } | |
1053 | ||
1054 | /* | |
1055 | * bool JoinDesired(*,G) { | |
1056 | * if (immediate_olist(*,G) != NULL) | |
1057 | * return TRUE | |
1058 | * else | |
1059 | * return FALSE | |
1060 | * } | |
1061 | * | |
1062 | * bool JoinDesired(S,G) { | |
1063 | * return( immediate_olist(S,G) != NULL | |
1064 | * OR ( KeepaliveTimer(S,G) is running | |
1065 | * AND inherited_olist(S,G) != NULL ) ) | |
1066 | * } | |
1067 | */ | |
1068 | int pim_upstream_evaluate_join_desired(struct pim_instance *pim, | |
1069 | struct pim_upstream *up) | |
1070 | { | |
1071 | bool empty_imm_oil; | |
1072 | bool empty_inh_oil; | |
1073 | ||
1074 | empty_imm_oil = pim_upstream_empty_immediate_olist(pim, up); | |
1075 | ||
1076 | /* (*,G) */ | |
1077 | if (up->sg.src.s_addr == INADDR_ANY) | |
1078 | return !empty_imm_oil; | |
1079 | ||
1080 | /* (S,G) */ | |
1081 | if (!empty_imm_oil) | |
1082 | return true; | |
1083 | empty_inh_oil = pim_upstream_empty_inherited_olist(up); | |
1084 | if (!empty_inh_oil && | |
1085 | (pim_upstream_is_kat_running(up) || | |
1086 | I_am_RP(pim, up->sg.grp))) | |
1087 | return true; | |
1088 | ||
1089 | return false; | |
12e41d03 DL |
1090 | } |
1091 | ||
1092 | /* | |
1093 | See also pim_upstream_evaluate_join_desired() above. | |
1094 | */ | |
9b29ea95 DS |
1095 | void pim_upstream_update_join_desired(struct pim_instance *pim, |
1096 | struct pim_upstream *up) | |
12e41d03 | 1097 | { |
d62a17ae | 1098 | int was_join_desired; /* boolean */ |
1099 | int is_join_desired; /* boolean */ | |
1100 | ||
1101 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
1102 | ||
9b29ea95 | 1103 | is_join_desired = pim_upstream_evaluate_join_desired(pim, up); |
d62a17ae | 1104 | if (is_join_desired) |
1105 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
1106 | else | |
1107 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
1108 | ||
1109 | /* switched from false to true */ | |
47e3ce59 | 1110 | if (is_join_desired && (up->join_state == PIM_UPSTREAM_NOTJOINED)) { |
1eca8576 | 1111 | pim_upstream_switch(pim, up, PIM_UPSTREAM_JOINED); |
d62a17ae | 1112 | return; |
1113 | } | |
1114 | ||
1115 | /* switched from true to false */ | |
1116 | if (!is_join_desired && was_join_desired) { | |
1eca8576 | 1117 | pim_upstream_switch(pim, up, PIM_UPSTREAM_NOTJOINED); |
d62a17ae | 1118 | return; |
1119 | } | |
12e41d03 DL |
1120 | } |
1121 | ||
1122 | /* | |
1123 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
1124 | Transitions from Joined State | |
1125 | RPF'(S,G) GenID changes | |
1126 | ||
1127 | The upstream (S,G) state machine remains in Joined state. If the | |
1128 | Join Timer is set to expire in more than t_override seconds, reset | |
1129 | it so that it expires after t_override seconds. | |
1130 | */ | |
9b29ea95 DS |
1131 | void pim_upstream_rpf_genid_changed(struct pim_instance *pim, |
1132 | struct in_addr neigh_addr) | |
12e41d03 | 1133 | { |
d62a17ae | 1134 | struct listnode *up_node; |
1135 | struct listnode *up_nextnode; | |
1136 | struct pim_upstream *up; | |
1137 | ||
1138 | /* | |
1139 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
1140 | */ | |
9b29ea95 | 1141 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { |
d62a17ae | 1142 | |
23fc858a | 1143 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 1144 | char neigh_str[INET_ADDRSTRLEN]; |
1145 | char rpf_addr_str[PREFIX_STRLEN]; | |
1146 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, | |
1147 | sizeof(neigh_str)); | |
1148 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, | |
1149 | sizeof(rpf_addr_str)); | |
1150 | zlog_debug( | |
8dbdb215 | 1151 | "%s: matching neigh=%s against upstream (S,G)=%s[%s] joined=%d rpf_addr=%s", |
996c9314 LB |
1152 | __PRETTY_FUNCTION__, neigh_str, up->sg_str, |
1153 | pim->vrf->name, | |
d62a17ae | 1154 | up->join_state == PIM_UPSTREAM_JOINED, |
1155 | rpf_addr_str); | |
1156 | } | |
1157 | ||
1158 | /* consider only (S,G) upstream in Joined state */ | |
1159 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
1160 | continue; | |
1161 | ||
1162 | /* match RPF'(S,G)=neigh_addr */ | |
1163 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) | |
1164 | continue; | |
1165 | ||
1166 | pim_upstream_join_timer_decrease_to_t_override( | |
1167 | "RPF'(S,G) GenID change", up); | |
1168 | } | |
12e41d03 DL |
1169 | } |
1170 | ||
1171 | ||
1172 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
1173 | struct interface *old_rpf_ifp) | |
1174 | { | |
d62a17ae | 1175 | struct listnode *chnode; |
1176 | struct listnode *chnextnode; | |
1177 | struct pim_ifchannel *ch; | |
1178 | ||
1179 | /* search all ifchannels */ | |
1180 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1181 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
1182 | if ( | |
1183 | /* RPF_interface(S) was NOT I */ | |
1184 | (old_rpf_ifp == ch->interface) && | |
1185 | /* RPF_interface(S) stopped being I */ | |
1186 | (ch->upstream->rpf.source_nexthop | |
957d93ea SP |
1187 | .interface) && |
1188 | (ch->upstream->rpf.source_nexthop | |
1189 | .interface != ch->interface)) { | |
d62a17ae | 1190 | assert_action_a5(ch); |
1191 | } | |
1192 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
1193 | ||
1194 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1195 | } | |
12e41d03 DL |
1196 | } |
1197 | ||
1198 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
1199 | { | |
d62a17ae | 1200 | struct listnode *chnode; |
1201 | struct listnode *chnextnode; | |
1202 | struct pim_ifchannel *ch; | |
1203 | ||
1204 | /* scan per-interface (S,G) state */ | |
1205 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1206 | pim_ifchannel_update_could_assert(ch); | |
1207 | } /* scan iface channel list */ | |
12e41d03 DL |
1208 | } |
1209 | ||
1210 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
1211 | { | |
d62a17ae | 1212 | struct listnode *chnode; |
1213 | struct listnode *chnextnode; | |
1214 | struct pim_ifchannel *ch; | |
12e41d03 | 1215 | |
d62a17ae | 1216 | /* scan per-interface (S,G) state */ |
1217 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1218 | pim_ifchannel_update_my_assert_metric(ch); | |
12e41d03 | 1219 | |
d62a17ae | 1220 | } /* scan iface channel list */ |
12e41d03 DL |
1221 | } |
1222 | ||
1223 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
1224 | { | |
d62a17ae | 1225 | struct listnode *chnode; |
1226 | struct listnode *chnextnode; | |
1227 | struct pim_interface *pim_ifp; | |
1228 | struct pim_ifchannel *ch; | |
1229 | ||
1230 | /* scan per-interface (S,G) state */ | |
1231 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1232 | if (!ch->interface) | |
1233 | continue; | |
1234 | pim_ifp = ch->interface->info; | |
1235 | if (!pim_ifp) | |
1236 | continue; | |
1237 | ||
1238 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1239 | ||
1240 | } /* scan iface channel list */ | |
12e41d03 | 1241 | } |
f14248dd | 1242 | |
1bf16443 | 1243 | /* When kat is stopped CouldRegister goes to false so we need to |
1244 | * transition the (S, G) on FHR to NI state and remove reg tunnel | |
1245 | * from the OIL */ | |
9b29ea95 DS |
1246 | static void pim_upstream_fhr_kat_expiry(struct pim_instance *pim, |
1247 | struct pim_upstream *up) | |
1bf16443 | 1248 | { |
d62a17ae | 1249 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
1250 | return; | |
1251 | ||
23fc858a | 1252 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1253 | zlog_debug("kat expired on %s; clear fhr reg state", |
1254 | up->sg_str); | |
1255 | ||
1256 | /* stop reg-stop timer */ | |
1257 | THREAD_OFF(up->t_rs_timer); | |
1258 | /* remove regiface from the OIL if it is there*/ | |
9b29ea95 | 1259 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
1b249e70 | 1260 | PIM_OIF_FLAG_PROTO_PIM, __func__); |
d62a17ae | 1261 | /* clear the register state */ |
1262 | up->reg_state = PIM_REG_NOINFO; | |
1263 | PIM_UPSTREAM_FLAG_UNSET_FHR(up->flags); | |
1bf16443 | 1264 | } |
1265 | ||
1266 | /* When kat is started CouldRegister can go to true. And if it does we | |
1267 | * need to transition the (S, G) on FHR to JOINED state and add reg tunnel | |
1268 | * to the OIL */ | |
1269 | static void pim_upstream_fhr_kat_start(struct pim_upstream *up) | |
1270 | { | |
d62a17ae | 1271 | if (pim_upstream_could_register(up)) { |
23fc858a | 1272 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1273 | zlog_debug( |
1274 | "kat started on %s; set fhr reg state to joined", | |
1275 | up->sg_str); | |
1276 | ||
1277 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
1278 | if (up->reg_state == PIM_REG_NOINFO) | |
1279 | pim_register_join(up); | |
69e3538c | 1280 | pim_upstream_update_use_rpt(up, true /*update_mroute*/); |
d62a17ae | 1281 | } |
1bf16443 | 1282 | } |
1283 | ||
f14248dd DS |
1284 | /* |
1285 | * On an RP, the PMBR value must be cleared when the | |
1286 | * Keepalive Timer expires | |
1bf16443 | 1287 | * KAT expiry indicates that flow is inactive. If the flow was created or |
1288 | * maintained by activity now is the time to deref it. | |
f14248dd | 1289 | */ |
ff459c36 AK |
1290 | struct pim_upstream *pim_upstream_keep_alive_timer_proc( |
1291 | struct pim_upstream *up) | |
f14248dd | 1292 | { |
8e5f97e3 | 1293 | struct pim_instance *pim; |
d62a17ae | 1294 | |
8e5f97e3 | 1295 | pim = up->channel_oil->pim; |
d62a17ae | 1296 | |
820b4a40 AK |
1297 | if (PIM_UPSTREAM_FLAG_TEST_DISABLE_KAT_EXPIRY(up->flags)) { |
1298 | /* if the router is a PIM vxlan encapsulator we prevent expiry | |
1299 | * of KAT as the mroute is pre-setup without any traffic | |
1300 | */ | |
1301 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); | |
ff459c36 | 1302 | return up; |
820b4a40 AK |
1303 | } |
1304 | ||
8e5f97e3 | 1305 | if (I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 1306 | pim_br_clear_pmbr(&up->sg); |
1307 | /* | |
1308 | * We need to do more here :) | |
1309 | * But this is the start. | |
1310 | */ | |
1311 | } | |
1312 | ||
1313 | /* source is no longer active - pull the SA from MSDP's cache */ | |
472ad383 | 1314 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 1315 | |
a53a9b3e AK |
1316 | /* JoinDesired can change when KAT is started or stopped */ |
1317 | pim_upstream_update_join_desired(pim, up); | |
1318 | ||
d62a17ae | 1319 | /* if entry was created because of activity we need to deref it */ |
1320 | if (PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
8e5f97e3 | 1321 | pim_upstream_fhr_kat_expiry(pim, up); |
23fc858a | 1322 | if (PIM_DEBUG_PIM_TRACE) |
996c9314 LB |
1323 | zlog_debug( |
1324 | "kat expired on %s[%s]; remove stream reference", | |
1325 | up->sg_str, pim->vrf->name); | |
d62a17ae | 1326 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(up->flags); |
e3e532dd | 1327 | |
1328 | /* Return if upstream entry got deleted.*/ | |
1329 | if (!pim_upstream_del(pim, up, __PRETTY_FUNCTION__)) | |
1330 | return NULL; | |
1331 | } | |
02434c43 DS |
1332 | if (PIM_UPSTREAM_FLAG_TEST_SRC_NOCACHE(up->flags)) { |
1333 | PIM_UPSTREAM_FLAG_UNSET_SRC_NOCACHE(up->flags); | |
1334 | ||
1335 | if (!pim_upstream_del(pim, up, __PRETTY_FUNCTION__)) | |
1336 | return NULL; | |
1337 | } | |
1338 | ||
e3e532dd | 1339 | /* upstream reference would have been added to track the local |
1340 | * membership if it is LHR. We have to clear it when KAT expires. | |
1341 | * Otherwise would result in stale entry with uncleared ref count. | |
1342 | */ | |
1343 | if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) { | |
8022df6a DS |
1344 | struct pim_upstream *parent = up->parent; |
1345 | ||
d62a17ae | 1346 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(up->flags); |
ff459c36 | 1347 | up = pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
8022df6a DS |
1348 | |
1349 | if (parent) { | |
996c9314 LB |
1350 | pim_jp_agg_single_upstream_send(&parent->rpf, parent, |
1351 | true); | |
8022df6a | 1352 | } |
d62a17ae | 1353 | } |
1354 | ||
ff459c36 AK |
1355 | return up; |
1356 | } | |
1357 | static int pim_upstream_keep_alive_timer(struct thread *t) | |
1358 | { | |
1359 | struct pim_upstream *up; | |
1360 | ||
1361 | up = THREAD_ARG(t); | |
1362 | ||
1363 | pim_upstream_keep_alive_timer_proc(up); | |
d62a17ae | 1364 | return 0; |
f14248dd DS |
1365 | } |
1366 | ||
d62a17ae | 1367 | void pim_upstream_keep_alive_timer_start(struct pim_upstream *up, uint32_t time) |
f14248dd | 1368 | { |
d62a17ae | 1369 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { |
23fc858a | 1370 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1371 | zlog_debug("kat start on %s with no stream reference", |
1372 | up->sg_str); | |
1373 | } | |
1374 | THREAD_OFF(up->t_ka_timer); | |
36417fcc DS |
1375 | thread_add_timer(router->master, pim_upstream_keep_alive_timer, up, |
1376 | time, &up->t_ka_timer); | |
d62a17ae | 1377 | |
1378 | /* any time keepalive is started against a SG we will have to | |
1379 | * re-evaluate our active source database */ | |
1380 | pim_msdp_sa_local_update(up); | |
a53a9b3e AK |
1381 | /* JoinDesired can change when KAT is started or stopped */ |
1382 | pim_upstream_update_join_desired(up->pim, up); | |
1bf16443 | 1383 | } |
1384 | ||
1385 | /* MSDP on RP needs to know if a source is registerable to this RP */ | |
d62a17ae | 1386 | static int pim_upstream_msdp_reg_timer(struct thread *t) |
1bf16443 | 1387 | { |
472ad383 DS |
1388 | struct pim_upstream *up = THREAD_ARG(t); |
1389 | struct pim_instance *pim = up->channel_oil->pim; | |
1bf16443 | 1390 | |
d62a17ae | 1391 | /* source is no longer active - pull the SA from MSDP's cache */ |
472ad383 | 1392 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 1393 | return 1; |
1bf16443 | 1394 | } |
d62a17ae | 1395 | void pim_upstream_msdp_reg_timer_start(struct pim_upstream *up) |
1bf16443 | 1396 | { |
d62a17ae | 1397 | THREAD_OFF(up->t_msdp_reg_timer); |
36417fcc | 1398 | thread_add_timer(router->master, pim_upstream_msdp_reg_timer, up, |
d62a17ae | 1399 | PIM_MSDP_REG_RXED_PERIOD, &up->t_msdp_reg_timer); |
1bf16443 | 1400 | |
d62a17ae | 1401 | pim_msdp_sa_local_update(up); |
f14248dd | 1402 | } |
cb40b272 DS |
1403 | |
1404 | /* | |
1405 | * 4.2.1 Last-Hop Switchover to the SPT | |
1406 | * | |
1407 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
1408 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
1409 | * router, it has the option of switching to receive the traffic on a | |
1410 | * shortest path tree (SPT). | |
1411 | * | |
1412 | * The decision for a router to switch to the SPT is controlled as | |
1413 | * follows: | |
1414 | * | |
1415 | * void | |
1416 | * CheckSwitchToSpt(S,G) { | |
1417 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
1418 | * (+) pim_include(S,G) != NULL ) | |
1419 | * AND SwitchToSptDesired(S,G) ) { | |
1420 | * # Note: Restarting the KAT will result in the SPT switch | |
1421 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1422 | * } | |
1423 | * } | |
1424 | * | |
1425 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
1426 | * defined. An "infinite threshold" policy can be implemented by making | |
1427 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
1428 | * first packet" policy can be implemented by making | |
1429 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
1430 | * received for the source and group. | |
1431 | */ | |
8e5f97e3 DS |
1432 | int pim_upstream_switch_to_spt_desired(struct pim_instance *pim, |
1433 | struct prefix_sg *sg) | |
cb40b272 | 1434 | { |
8e5f97e3 | 1435 | if (I_am_RP(pim, sg->grp)) |
d62a17ae | 1436 | return 1; |
a3b58b4a | 1437 | |
d62a17ae | 1438 | return 0; |
cb40b272 | 1439 | } |
d7259eac | 1440 | |
d62a17ae | 1441 | int pim_upstream_is_sg_rpt(struct pim_upstream *up) |
80d9c3a0 | 1442 | { |
d62a17ae | 1443 | struct listnode *chnode; |
1444 | struct pim_ifchannel *ch; | |
f21597f0 | 1445 | |
d62a17ae | 1446 | for (ALL_LIST_ELEMENTS_RO(up->ifchannels, chnode, ch)) { |
1447 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
1448 | return 1; | |
1449 | } | |
e43b8697 | 1450 | |
d62a17ae | 1451 | return 0; |
80d9c3a0 | 1452 | } |
3a66b17b DS |
1453 | /* |
1454 | * After receiving a packet set SPTbit: | |
1455 | * void | |
1456 | * Update_SPTbit(S,G,iif) { | |
1457 | * if ( iif == RPF_interface(S) | |
2951a7a4 QY |
1458 | * AND JoinDesired(S,G) == true |
1459 | * AND ( DirectlyConnected(S) == true | |
3a66b17b DS |
1460 | * OR RPF_interface(S) != RPF_interface(RP(G)) |
1461 | * OR inherited_olist(S,G,rpt) == NULL | |
1462 | * OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1463 | * ( RPF'(S,G) != NULL ) ) | |
1464 | * OR ( I_Am_Assert_Loser(S,G,iif) ) { | |
2951a7a4 | 1465 | * Set SPTbit(S,G) to true |
3a66b17b DS |
1466 | * } |
1467 | * } | |
1468 | */ | |
d62a17ae | 1469 | void pim_upstream_set_sptbit(struct pim_upstream *up, |
1470 | struct interface *incoming) | |
3a66b17b | 1471 | { |
d62a17ae | 1472 | struct pim_upstream *starup = up->parent; |
1473 | ||
1474 | // iif == RPF_interfvace(S) | |
1475 | if (up->rpf.source_nexthop.interface != incoming) { | |
23fc858a | 1476 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1477 | zlog_debug( |
1478 | "%s: Incoming Interface: %s is different than RPF_interface(S) %s", | |
1479 | __PRETTY_FUNCTION__, incoming->name, | |
1480 | up->rpf.source_nexthop.interface->name); | |
1481 | return; | |
1482 | } | |
1483 | ||
2951a7a4 | 1484 | // AND JoinDesired(S,G) == true |
6f0f014f | 1485 | if (!pim_upstream_evaluate_join_desired(up->channel_oil->pim, up)) { |
23fc858a | 1486 | if (PIM_DEBUG_PIM_TRACE) |
6f0f014f DS |
1487 | zlog_debug("%s: %s Join is not Desired", |
1488 | __PRETTY_FUNCTION__, up->sg_str); | |
1489 | return; | |
1490 | } | |
d62a17ae | 1491 | |
2951a7a4 | 1492 | // DirectlyConnected(S) == true |
d62a17ae | 1493 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, |
1494 | up->sg.src)) { | |
23fc858a | 1495 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1496 | zlog_debug("%s: %s is directly connected to the source", |
1497 | __PRETTY_FUNCTION__, up->sg_str); | |
1498 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1499 | return; | |
1500 | } | |
1501 | ||
1502 | // OR RPF_interface(S) != RPF_interface(RP(G)) | |
1503 | if (!starup | |
1504 | || up->rpf.source_nexthop | |
1505 | .interface != starup->rpf.source_nexthop.interface) { | |
2de05c60 DS |
1506 | struct pim_upstream *starup = up->parent; |
1507 | ||
23fc858a | 1508 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1509 | zlog_debug( |
1510 | "%s: %s RPF_interface(S) != RPF_interface(RP(G))", | |
1511 | __PRETTY_FUNCTION__, up->sg_str); | |
1512 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
2de05c60 DS |
1513 | |
1514 | pim_jp_agg_single_upstream_send(&starup->rpf, starup, true); | |
d62a17ae | 1515 | return; |
1516 | } | |
1517 | ||
1518 | // OR inherited_olist(S,G,rpt) == NULL | |
1519 | if (pim_upstream_is_sg_rpt(up) | |
1520 | && pim_upstream_empty_inherited_olist(up)) { | |
23fc858a | 1521 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1522 | zlog_debug("%s: %s OR inherited_olist(S,G,rpt) == NULL", |
1523 | __PRETTY_FUNCTION__, up->sg_str); | |
1524 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1525 | return; | |
1526 | } | |
1527 | ||
1528 | // OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1529 | // ( RPF'(S,G) != NULL ) ) | |
1530 | if (up->parent && pim_rpf_is_same(&up->rpf, &up->parent->rpf)) { | |
23fc858a | 1531 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1532 | zlog_debug("%s: %s RPF'(S,G) is the same as RPF'(*,G)", |
1533 | __PRETTY_FUNCTION__, up->sg_str); | |
1534 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1535 | return; | |
1536 | } | |
1537 | ||
1538 | return; | |
3a66b17b | 1539 | } |
80d9c3a0 | 1540 | |
d62a17ae | 1541 | const char *pim_upstream_state2str(enum pim_upstream_state join_state) |
d7259eac | 1542 | { |
d62a17ae | 1543 | switch (join_state) { |
1544 | case PIM_UPSTREAM_NOTJOINED: | |
1545 | return "NotJoined"; | |
1546 | break; | |
1547 | case PIM_UPSTREAM_JOINED: | |
1548 | return "Joined"; | |
1549 | break; | |
1550 | } | |
1551 | return "Unknown"; | |
d7259eac | 1552 | } |
627ed2a3 | 1553 | |
c35b7e6b QY |
1554 | const char *pim_reg_state2str(enum pim_reg_state reg_state, char *state_str, |
1555 | size_t state_str_len) | |
e0e127b0 | 1556 | { |
d62a17ae | 1557 | switch (reg_state) { |
1558 | case PIM_REG_NOINFO: | |
c35b7e6b | 1559 | strlcpy(state_str, "RegNoInfo", state_str_len); |
d62a17ae | 1560 | break; |
1561 | case PIM_REG_JOIN: | |
c35b7e6b | 1562 | strlcpy(state_str, "RegJoined", state_str_len); |
d62a17ae | 1563 | break; |
1564 | case PIM_REG_JOIN_PENDING: | |
c35b7e6b | 1565 | strlcpy(state_str, "RegJoinPend", state_str_len); |
d62a17ae | 1566 | break; |
1567 | case PIM_REG_PRUNE: | |
c35b7e6b | 1568 | strlcpy(state_str, "RegPrune", state_str_len); |
d62a17ae | 1569 | break; |
1570 | default: | |
c35b7e6b | 1571 | strlcpy(state_str, "RegUnknown", state_str_len); |
d62a17ae | 1572 | } |
1573 | return state_str; | |
e0e127b0 | 1574 | } |
1575 | ||
d62a17ae | 1576 | static int pim_upstream_register_stop_timer(struct thread *t) |
627ed2a3 | 1577 | { |
d62a17ae | 1578 | struct pim_interface *pim_ifp; |
8e5f97e3 | 1579 | struct pim_instance *pim; |
d62a17ae | 1580 | struct pim_upstream *up; |
d62a17ae | 1581 | up = THREAD_ARG(t); |
8e5f97e3 | 1582 | pim = up->channel_oil->pim; |
d62a17ae | 1583 | |
23fc858a | 1584 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 1585 | char state_str[PIM_REG_STATE_STR_LEN]; |
8dbdb215 DS |
1586 | zlog_debug("%s: (S,G)=%s[%s] upstream register stop timer %s", |
1587 | __PRETTY_FUNCTION__, up->sg_str, pim->vrf->name, | |
c35b7e6b | 1588 | pim_reg_state2str(up->reg_state, state_str, sizeof(state_str))); |
d62a17ae | 1589 | } |
1590 | ||
1591 | switch (up->reg_state) { | |
1592 | case PIM_REG_JOIN_PENDING: | |
1593 | up->reg_state = PIM_REG_JOIN; | |
8e5f97e3 | 1594 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
1b249e70 AK |
1595 | PIM_OIF_FLAG_PROTO_PIM, |
1596 | __func__); | |
2951a7a4 | 1597 | pim_vxlan_update_sg_reg_state(pim, up, true /*reg_join*/); |
d62a17ae | 1598 | break; |
1599 | case PIM_REG_JOIN: | |
1600 | break; | |
1601 | case PIM_REG_PRUNE: | |
957d93ea | 1602 | if (!up->rpf.source_nexthop.interface) { |
23fc858a | 1603 | if (PIM_DEBUG_PIM_TRACE) |
957d93ea SP |
1604 | zlog_debug("%s: up %s RPF is not present", |
1605 | __PRETTY_FUNCTION__, up->sg_str); | |
1606 | return 0; | |
1607 | } | |
1608 | ||
d62a17ae | 1609 | pim_ifp = up->rpf.source_nexthop.interface->info; |
1610 | if (!pim_ifp) { | |
23fc858a | 1611 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1612 | zlog_debug( |
1613 | "%s: Interface: %s is not configured for pim", | |
1614 | __PRETTY_FUNCTION__, | |
1615 | up->rpf.source_nexthop.interface->name); | |
1616 | return 0; | |
1617 | } | |
1618 | up->reg_state = PIM_REG_JOIN_PENDING; | |
1619 | pim_upstream_start_register_stop_timer(up, 1); | |
1620 | ||
1621 | if (((up->channel_oil->cc.lastused / 100) | |
2f5b0028 | 1622 | > pim->keep_alive_time) |
d9c9a9ee | 1623 | && (I_am_RP(pim_ifp->pim, up->sg.grp))) { |
23fc858a | 1624 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1625 | zlog_debug( |
1626 | "%s: Stop sending the register, because I am the RP and we haven't seen a packet in a while", | |
1627 | __PRETTY_FUNCTION__); | |
1628 | return 0; | |
1629 | } | |
aea1f845 | 1630 | pim_null_register_send(up); |
d62a17ae | 1631 | break; |
1632 | default: | |
1633 | break; | |
70e7fda8 | 1634 | } |
d62a17ae | 1635 | |
1636 | return 0; | |
627ed2a3 DS |
1637 | } |
1638 | ||
d62a17ae | 1639 | void pim_upstream_start_register_stop_timer(struct pim_upstream *up, |
1640 | int null_register) | |
627ed2a3 | 1641 | { |
d62a17ae | 1642 | uint32_t time; |
1643 | ||
1644 | THREAD_TIMER_OFF(up->t_rs_timer); | |
1645 | ||
1646 | if (!null_register) { | |
1647 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1648 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1649 | time = lower + (random() % (upper - lower + 1)) | |
1650 | - PIM_REGISTER_PROBE_PERIOD; | |
1651 | } else | |
1652 | time = PIM_REGISTER_PROBE_PERIOD; | |
1653 | ||
23fc858a | 1654 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 1655 | zlog_debug( |
1656 | "%s: (S,G)=%s Starting upstream register stop timer %d", | |
1657 | __PRETTY_FUNCTION__, up->sg_str, time); | |
1658 | } | |
36417fcc DS |
1659 | thread_add_timer(router->master, pim_upstream_register_stop_timer, up, |
1660 | time, &up->t_rs_timer); | |
627ed2a3 | 1661 | } |
4fdc8f36 | 1662 | |
9b29ea95 DS |
1663 | int pim_upstream_inherited_olist_decide(struct pim_instance *pim, |
1664 | struct pim_upstream *up) | |
4fdc8f36 | 1665 | { |
d62a17ae | 1666 | struct interface *ifp; |
d62a17ae | 1667 | struct pim_ifchannel *ch, *starch; |
d62a17ae | 1668 | struct pim_upstream *starup = up->parent; |
1669 | int output_intf = 0; | |
1670 | ||
46dd6edb | 1671 | if (!up->rpf.source_nexthop.interface) |
23fc858a | 1672 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1673 | zlog_debug("%s: up %s RPF is not present", |
1674 | __PRETTY_FUNCTION__, up->sg_str); | |
d62a17ae | 1675 | |
451fda4f | 1676 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
d62a17ae | 1677 | if (!ifp->info) |
1678 | continue; | |
1679 | ||
1680 | ch = pim_ifchannel_find(ifp, &up->sg); | |
1681 | ||
1682 | if (starup) | |
1683 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
1684 | else | |
1685 | starch = NULL; | |
1686 | ||
1687 | if (!ch && !starch) | |
1688 | continue; | |
1689 | ||
1690 | if (pim_upstream_evaluate_join_desired_interface(up, ch, | |
1691 | starch)) { | |
1692 | int flag = PIM_OIF_FLAG_PROTO_PIM; | |
1693 | ||
1694 | if (!ch) | |
1695 | flag = PIM_OIF_FLAG_PROTO_STAR; | |
1696 | ||
1b249e70 AK |
1697 | pim_channel_add_oif(up->channel_oil, ifp, flag, |
1698 | __func__); | |
d62a17ae | 1699 | output_intf++; |
1700 | } | |
1701 | } | |
1702 | ||
1703 | return output_intf; | |
b5183fd1 DS |
1704 | } |
1705 | ||
1706 | /* | |
1707 | * For a given upstream, determine the inherited_olist | |
1708 | * and apply it. | |
1709 | * | |
1710 | * inherited_olist(S,G,rpt) = | |
1711 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1712 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1713 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1714 | * | |
1715 | * inherited_olist(S,G) = | |
1716 | * inherited_olist(S,G,rpt) (+) | |
1717 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1718 | * | |
1719 | * return 1 if there are any output interfaces | |
1720 | * return 0 if there are not any output interfaces | |
1721 | */ | |
9b29ea95 DS |
1722 | int pim_upstream_inherited_olist(struct pim_instance *pim, |
1723 | struct pim_upstream *up) | |
b5183fd1 | 1724 | { |
9b29ea95 | 1725 | int output_intf = pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 1726 | |
1727 | /* | |
1728 | * If we have output_intf switch state to Join and work like normal | |
1729 | * If we don't have an output_intf that means we are probably a | |
1730 | * switch on a stick so turn on forwarding to just accept the | |
1731 | * incoming packets so we don't bother the other stuff! | |
1732 | */ | |
a53a9b3e AK |
1733 | pim_upstream_update_join_desired(pim, up); |
1734 | ||
1735 | if (!output_intf) | |
d62a17ae | 1736 | forward_on(up); |
1737 | ||
1738 | return output_intf; | |
4fdc8f36 | 1739 | } |
d3dd1804 | 1740 | |
d62a17ae | 1741 | int pim_upstream_empty_inherited_olist(struct pim_upstream *up) |
80d9c3a0 | 1742 | { |
d62a17ae | 1743 | return pim_channel_oil_empty(up->channel_oil); |
80d9c3a0 DS |
1744 | } |
1745 | ||
d3dd1804 DS |
1746 | /* |
1747 | * When we have a new neighbor, | |
1748 | * find upstreams that don't have their rpf_addr | |
1749 | * set and see if the new neighbor allows | |
1750 | * the join to be sent | |
1751 | */ | |
9b29ea95 | 1752 | void pim_upstream_find_new_rpf(struct pim_instance *pim) |
d3dd1804 | 1753 | { |
d62a17ae | 1754 | struct listnode *up_node; |
1755 | struct listnode *up_nextnode; | |
1756 | struct pim_upstream *up; | |
1757 | ||
1758 | /* | |
1759 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
1760 | */ | |
9b29ea95 | 1761 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { |
957d93ea | 1762 | if (up->upstream_addr.s_addr == INADDR_ANY) { |
23fc858a | 1763 | if (PIM_DEBUG_PIM_TRACE) |
957d93ea SP |
1764 | zlog_debug( |
1765 | "%s: RP not configured for Upstream %s", | |
1766 | __PRETTY_FUNCTION__, up->sg_str); | |
1767 | continue; | |
1768 | } | |
1769 | ||
d62a17ae | 1770 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { |
23fc858a | 1771 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1772 | zlog_debug( |
957d93ea SP |
1773 | "%s: Upstream %s without a path to send join, checking", |
1774 | __PRETTY_FUNCTION__, up->sg_str); | |
ae14da48 | 1775 | pim_rpf_update(pim, up, NULL); |
d62a17ae | 1776 | } |
d3dd1804 | 1777 | } |
d3dd1804 | 1778 | } |
0f588989 | 1779 | |
d8b87afe | 1780 | unsigned int pim_upstream_hash_key(const void *arg) |
0f588989 | 1781 | { |
d8b87afe | 1782 | const struct pim_upstream *up = arg; |
0f588989 | 1783 | |
d62a17ae | 1784 | return jhash_2words(up->sg.src.s_addr, up->sg.grp.s_addr, 0); |
0f588989 DS |
1785 | } |
1786 | ||
9b29ea95 | 1787 | void pim_upstream_terminate(struct pim_instance *pim) |
0f588989 | 1788 | { |
172e45dc DS |
1789 | struct pim_upstream *up; |
1790 | ||
1791 | if (pim->upstream_list) { | |
1d483838 DS |
1792 | while (pim->upstream_list->count) { |
1793 | up = listnode_head(pim->upstream_list); | |
172e45dc | 1794 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
1d483838 | 1795 | } |
172e45dc | 1796 | |
6a154c88 | 1797 | list_delete(&pim->upstream_list); |
172e45dc | 1798 | } |
0f588989 | 1799 | |
9b29ea95 DS |
1800 | if (pim->upstream_hash) |
1801 | hash_free(pim->upstream_hash); | |
1802 | pim->upstream_hash = NULL; | |
0c68972d DS |
1803 | |
1804 | if (pim->upstream_sg_wheel) | |
1805 | wheel_delete(pim->upstream_sg_wheel); | |
1806 | pim->upstream_sg_wheel = NULL; | |
0f588989 DS |
1807 | } |
1808 | ||
74df8d6d | 1809 | bool pim_upstream_equal(const void *arg1, const void *arg2) |
0f588989 | 1810 | { |
d62a17ae | 1811 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
1812 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
0f588989 | 1813 | |
d62a17ae | 1814 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) |
1815 | && (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
74df8d6d | 1816 | return true; |
0f588989 | 1817 | |
74df8d6d | 1818 | return false; |
0f588989 DS |
1819 | } |
1820 | ||
1bf16443 | 1821 | /* rfc4601:section-4.2:"Data Packet Forwarding Rules" defines |
1822 | * the cases where kat has to be restarted on rxing traffic - | |
1823 | * | |
2951a7a4 | 1824 | * if( DirectlyConnected(S) == true AND iif == RPF_interface(S) ) { |
1bf16443 | 1825 | * set KeepaliveTimer(S,G) to Keepalive_Period |
1826 | * # Note: a register state transition or UpstreamJPState(S,G) | |
1827 | * # transition may happen as a result of restarting | |
1828 | * # KeepaliveTimer, and must be dealt with here. | |
1829 | * } | |
1830 | * if( iif == RPF_interface(S) AND UpstreamJPState(S,G) == Joined AND | |
1831 | * inherited_olist(S,G) != NULL ) { | |
1832 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1833 | * } | |
1834 | */ | |
1835 | static bool pim_upstream_kat_start_ok(struct pim_upstream *up) | |
1836 | { | |
8e5f97e3 DS |
1837 | struct pim_instance *pim = up->channel_oil->pim; |
1838 | ||
d62a17ae | 1839 | /* "iif == RPF_interface(S)" check has to be done by the kernel or hw |
1840 | * so we will skip that here */ | |
957d93ea SP |
1841 | if (up->rpf.source_nexthop.interface && |
1842 | pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
d62a17ae | 1843 | up->sg.src)) { |
1844 | return true; | |
1845 | } | |
1846 | ||
1847 | if ((up->join_state == PIM_UPSTREAM_JOINED) | |
1848 | && !pim_upstream_empty_inherited_olist(up)) { | |
1849 | /* XXX: I have added this RP check just for 3.2 and it's a | |
1850 | * digression from | |
1851 | * what rfc-4601 says. Till now we were only running KAT on FHR | |
1852 | * and RP and | |
1853 | * there is some angst around making the change to run it all | |
1854 | * routers that | |
1855 | * maintain the (S, G) state. This is tracked via CM-13601 and | |
1856 | * MUST be | |
1857 | * removed to handle spt turn-arounds correctly in a 3-tier clos | |
1858 | */ | |
8e5f97e3 | 1859 | if (I_am_RP(pim, up->sg.grp)) |
d62a17ae | 1860 | return true; |
1861 | } | |
1862 | ||
1863 | return false; | |
1bf16443 | 1864 | } |
1865 | ||
9c5e4d62 DS |
1866 | /* |
1867 | * Code to check and see if we've received packets on a S,G mroute | |
1868 | * and if so to set the SPT bit appropriately | |
1869 | */ | |
d62a17ae | 1870 | static void pim_upstream_sg_running(void *arg) |
9c5e4d62 | 1871 | { |
d62a17ae | 1872 | struct pim_upstream *up = (struct pim_upstream *)arg; |
8e5f97e3 | 1873 | struct pim_instance *pim = up->channel_oil->pim; |
d62a17ae | 1874 | |
1875 | // No packet can have arrived here if this is the case | |
8e5f97e3 | 1876 | if (!up->channel_oil->installed) { |
23fc858a | 1877 | if (PIM_DEBUG_PIM_TRACE) |
41714081 | 1878 | zlog_debug("%s: %s%s is not installed in mroute", |
996c9314 LB |
1879 | __PRETTY_FUNCTION__, up->sg_str, |
1880 | pim->vrf->name); | |
d62a17ae | 1881 | return; |
1882 | } | |
1883 | ||
1884 | /* | |
1885 | * This is a bit of a hack | |
1886 | * We've noted that we should rescan but | |
1887 | * we've missed the window for doing so in | |
1888 | * pim_zebra.c for some reason. I am | |
1889 | * only doing this at this point in time | |
1890 | * to get us up and working for the moment | |
1891 | */ | |
1892 | if (up->channel_oil->oil_inherited_rescan) { | |
23fc858a | 1893 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1894 | zlog_debug( |
8dbdb215 | 1895 | "%s: Handling unscanned inherited_olist for %s[%s]", |
996c9314 LB |
1896 | __PRETTY_FUNCTION__, up->sg_str, |
1897 | pim->vrf->name); | |
8e5f97e3 | 1898 | pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 1899 | up->channel_oil->oil_inherited_rescan = 0; |
1900 | } | |
1901 | pim_mroute_update_counters(up->channel_oil); | |
1902 | ||
1903 | // Have we seen packets? | |
1904 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) | |
1905 | && (up->channel_oil->cc.lastused / 100 > 30)) { | |
23fc858a | 1906 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 1907 | zlog_debug( |
8dbdb215 DS |
1908 | "%s[%s]: %s old packet count is equal or lastused is greater than 30, (%ld,%ld,%lld)", |
1909 | __PRETTY_FUNCTION__, up->sg_str, pim->vrf->name, | |
d62a17ae | 1910 | up->channel_oil->cc.oldpktcnt, |
1911 | up->channel_oil->cc.pktcnt, | |
1912 | up->channel_oil->cc.lastused / 100); | |
1913 | } | |
1914 | return; | |
e43b8697 | 1915 | } |
d62a17ae | 1916 | |
1917 | if (pim_upstream_kat_start_ok(up)) { | |
1918 | /* Add a source reference to the stream if | |
1919 | * one doesn't already exist */ | |
1920 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
23fc858a | 1921 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1922 | zlog_debug( |
8dbdb215 DS |
1923 | "source reference created on kat restart %s[%s]", |
1924 | up->sg_str, pim->vrf->name); | |
d62a17ae | 1925 | |
1926 | pim_upstream_ref(up, PIM_UPSTREAM_FLAG_MASK_SRC_STREAM, | |
1927 | __PRETTY_FUNCTION__); | |
1928 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); | |
1929 | pim_upstream_fhr_kat_start(up); | |
1930 | } | |
19b807ca | 1931 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); |
d62a17ae | 1932 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) |
19b807ca | 1933 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); |
d62a17ae | 1934 | |
957d93ea SP |
1935 | if ((up->sptbit != PIM_UPSTREAM_SPTBIT_TRUE) && |
1936 | (up->rpf.source_nexthop.interface)) { | |
d62a17ae | 1937 | pim_upstream_set_sptbit(up, up->rpf.source_nexthop.interface); |
850a9f99 | 1938 | } |
d62a17ae | 1939 | return; |
9c5e4d62 DS |
1940 | } |
1941 | ||
9b29ea95 | 1942 | void pim_upstream_add_lhr_star_pimreg(struct pim_instance *pim) |
a7b2b1e2 | 1943 | { |
d62a17ae | 1944 | struct pim_upstream *up; |
1945 | struct listnode *node; | |
a7b2b1e2 | 1946 | |
9b29ea95 | 1947 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { |
d62a17ae | 1948 | if (up->sg.src.s_addr != INADDR_ANY) |
1949 | continue; | |
a7b2b1e2 | 1950 | |
d62a17ae | 1951 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) |
1952 | continue; | |
a7b2b1e2 | 1953 | |
9b29ea95 | 1954 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
1b249e70 | 1955 | PIM_OIF_FLAG_PROTO_IGMP, __func__); |
d62a17ae | 1956 | } |
a7b2b1e2 DS |
1957 | } |
1958 | ||
9b29ea95 DS |
1959 | void pim_upstream_spt_prefix_list_update(struct pim_instance *pim, |
1960 | struct prefix_list *pl) | |
df94f9a9 | 1961 | { |
d62a17ae | 1962 | const char *pname = prefix_list_name(pl); |
df94f9a9 | 1963 | |
9b29ea95 DS |
1964 | if (pim->spt.plist && strcmp(pim->spt.plist, pname) == 0) { |
1965 | pim_upstream_remove_lhr_star_pimreg(pim, pname); | |
d62a17ae | 1966 | } |
df94f9a9 DS |
1967 | } |
1968 | ||
1969 | /* | |
1970 | * nlist -> The new prefix list | |
1971 | * | |
1972 | * Per Group Application of pimreg to the OIL | |
1973 | * If the prefix list tells us DENY then | |
1974 | * we need to Switchover to SPT immediate | |
1975 | * so add the pimreg. | |
1976 | * If the prefix list tells us to ACCEPT than | |
1977 | * we need to Never do the SPT so remove | |
1978 | * the interface | |
1979 | * | |
1980 | */ | |
9b29ea95 DS |
1981 | void pim_upstream_remove_lhr_star_pimreg(struct pim_instance *pim, |
1982 | const char *nlist) | |
a7b2b1e2 | 1983 | { |
d62a17ae | 1984 | struct pim_upstream *up; |
1985 | struct listnode *node; | |
1986 | struct prefix_list *np; | |
1987 | struct prefix g; | |
1988 | enum prefix_list_type apply_new; | |
1989 | ||
1990 | np = prefix_list_lookup(AFI_IP, nlist); | |
1991 | ||
1992 | g.family = AF_INET; | |
1993 | g.prefixlen = IPV4_MAX_PREFIXLEN; | |
1994 | ||
9b29ea95 | 1995 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { |
d62a17ae | 1996 | if (up->sg.src.s_addr != INADDR_ANY) |
1997 | continue; | |
1998 | ||
1999 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) | |
2000 | continue; | |
2001 | ||
2002 | if (!nlist) { | |
9b29ea95 | 2003 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
1b249e70 | 2004 | PIM_OIF_FLAG_PROTO_IGMP, __func__); |
d62a17ae | 2005 | continue; |
2006 | } | |
2007 | g.u.prefix4 = up->sg.grp; | |
2008 | apply_new = prefix_list_apply(np, &g); | |
2009 | if (apply_new == PREFIX_DENY) | |
9b29ea95 | 2010 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
1b249e70 AK |
2011 | PIM_OIF_FLAG_PROTO_IGMP, |
2012 | __func__); | |
d62a17ae | 2013 | else |
9b29ea95 | 2014 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
1b249e70 | 2015 | PIM_OIF_FLAG_PROTO_IGMP, __func__); |
d62a17ae | 2016 | } |
a7b2b1e2 DS |
2017 | } |
2018 | ||
9b29ea95 | 2019 | void pim_upstream_init(struct pim_instance *pim) |
0f588989 | 2020 | { |
c2cfa843 | 2021 | char name[64]; |
9fb302f4 | 2022 | |
c2cfa843 DS |
2023 | snprintf(name, 64, "PIM %s Timer Wheel", |
2024 | pim->vrf->name); | |
9b29ea95 | 2025 | pim->upstream_sg_wheel = |
36417fcc | 2026 | wheel_init(router->master, 31000, 100, pim_upstream_hash_key, |
c2cfa843 | 2027 | pim_upstream_sg_running, name); |
9fb302f4 | 2028 | |
c2cfa843 DS |
2029 | snprintf(name, 64, "PIM %s Upstream Hash", |
2030 | pim->vrf->name); | |
9b29ea95 | 2031 | pim->upstream_hash = hash_create_size(8192, pim_upstream_hash_key, |
c2cfa843 | 2032 | pim_upstream_equal, name); |
d62a17ae | 2033 | |
9b29ea95 | 2034 | pim->upstream_list = list_new(); |
9b29ea95 | 2035 | pim->upstream_list->cmp = pim_upstream_compare; |
0f588989 | 2036 | } |