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Commit | Line | Data |
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12e41d03 | 1 | /* |
896014f4 DL |
2 | * PIM for Quagga |
3 | * Copyright (C) 2008 Everton da Silva Marques | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; see the file COPYING; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
12e41d03 DL |
19 | |
20 | #include <zebra.h> | |
21 | ||
12e41d03 DL |
22 | #include "log.h" |
23 | #include "zclient.h" | |
24 | #include "memory.h" | |
25 | #include "thread.h" | |
26 | #include "linklist.h" | |
dfe43e25 DW |
27 | #include "vty.h" |
28 | #include "plist.h" | |
0f588989 DS |
29 | #include "hash.h" |
30 | #include "jhash.h" | |
9c5e4d62 | 31 | #include "wheel.h" |
12e41d03 DL |
32 | |
33 | #include "pimd.h" | |
34 | #include "pim_pim.h" | |
35 | #include "pim_str.h" | |
36 | #include "pim_time.h" | |
37 | #include "pim_iface.h" | |
38 | #include "pim_join.h" | |
39 | #include "pim_zlookup.h" | |
40 | #include "pim_upstream.h" | |
41 | #include "pim_ifchannel.h" | |
42 | #include "pim_neighbor.h" | |
43 | #include "pim_rpf.h" | |
44 | #include "pim_zebra.h" | |
45 | #include "pim_oil.h" | |
46 | #include "pim_macro.h" | |
8f5f5e91 | 47 | #include "pim_rp.h" |
f14248dd | 48 | #include "pim_br.h" |
627ed2a3 | 49 | #include "pim_register.h" |
3c72d654 | 50 | #include "pim_msdp.h" |
982bff89 | 51 | #include "pim_jp_agg.h" |
1bc98276 | 52 | #include "pim_nht.h" |
15a5dafe | 53 | #include "pim_ssm.h" |
b9f3a51c | 54 | #include "pim_vxlan.h" |
12e41d03 | 55 | |
982bff89 | 56 | static void join_timer_stop(struct pim_upstream *up); |
d62a17ae | 57 | static void |
58 | pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); | |
12e41d03 | 59 | |
cfa91a87 DS |
60 | /* |
61 | * A (*,G) or a (*,*) is going away | |
62 | * remove the parent pointer from | |
63 | * those pointing at us | |
64 | */ | |
9b29ea95 DS |
65 | static void pim_upstream_remove_children(struct pim_instance *pim, |
66 | struct pim_upstream *up) | |
cfa91a87 | 67 | { |
d62a17ae | 68 | struct pim_upstream *child; |
69 | ||
70 | if (!up->sources) | |
71 | return; | |
72 | ||
73 | while (!list_isempty(up->sources)) { | |
74 | child = listnode_head(up->sources); | |
75 | listnode_delete(up->sources, child); | |
76 | if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(child->flags)) { | |
77 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(child->flags); | |
9b29ea95 DS |
78 | child = pim_upstream_del(pim, child, |
79 | __PRETTY_FUNCTION__); | |
d62a17ae | 80 | } |
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 | ||
c5cdf069 AK |
193 | if (PIM_DEBUG_TRACE) |
194 | zlog_debug( | |
195 | "pim_upstream free vrf:%s %s flags 0x%x", | |
196 | pim->vrf->name, up->sg_str, up->flags); | |
197 | ||
d62a17ae | 198 | THREAD_OFF(up->t_ka_timer); |
199 | THREAD_OFF(up->t_rs_timer); | |
200 | THREAD_OFF(up->t_msdp_reg_timer); | |
201 | ||
202 | if (up->join_state == PIM_UPSTREAM_JOINED) { | |
203 | pim_jp_agg_single_upstream_send(&up->rpf, up, 0); | |
204 | ||
205 | if (up->sg.src.s_addr == INADDR_ANY) { | |
206 | /* if a (*, G) entry in the joined state is being | |
207 | * deleted we | |
208 | * need to notify MSDP */ | |
209 | notify_msdp = true; | |
210 | } | |
211 | } | |
212 | ||
213 | join_timer_stop(up); | |
214 | pim_jp_agg_upstream_verification(up, false); | |
215 | up->rpf.source_nexthop.interface = NULL; | |
216 | ||
217 | if (up->sg.src.s_addr != INADDR_ANY) { | |
391b8b08 DS |
218 | if (pim->upstream_sg_wheel) |
219 | wheel_remove_item(pim->upstream_sg_wheel, up); | |
d62a17ae | 220 | notify_msdp = true; |
221 | } | |
222 | ||
d62a17ae | 223 | pim_mroute_del(up->channel_oil, __PRETTY_FUNCTION__); |
224 | upstream_channel_oil_detach(up); | |
225 | ||
7692c5ae DS |
226 | for (ALL_LIST_ELEMENTS(up->ifchannels, node, nnode, ch)) |
227 | pim_ifchannel_delete(ch); | |
6a154c88 | 228 | list_delete(&up->ifchannels); |
d62a17ae | 229 | |
7692c5ae DS |
230 | pim_upstream_remove_children(pim, up); |
231 | if (up->sources) | |
6a154c88 | 232 | list_delete(&up->sources); |
7692c5ae | 233 | |
d62a17ae | 234 | if (up->parent && up->parent->sources) |
235 | listnode_delete(up->parent->sources, up); | |
236 | up->parent = NULL; | |
237 | ||
9b29ea95 DS |
238 | listnode_delete(pim->upstream_list, up); |
239 | hash_release(pim->upstream_hash, up); | |
d62a17ae | 240 | |
241 | if (notify_msdp) { | |
472ad383 | 242 | pim_msdp_up_del(pim, &up->sg); |
d62a17ae | 243 | } |
244 | ||
246445a3 SP |
245 | /* When RP gets deleted, pim_rp_del() deregister addr with Zebra NHT |
246 | * and assign up->upstream_addr as INADDR_ANY. | |
247 | * So before de-registering the upstream address, check if is not equal | |
248 | * to INADDR_ANY. This is done in order to avoid de-registering for | |
249 | * 255.255.255.255 which is maintained for some reason.. | |
250 | */ | |
251 | if (up->upstream_addr.s_addr != INADDR_ANY) { | |
252 | /* Deregister addr with Zebra NHT */ | |
253 | nht_p.family = AF_INET; | |
254 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
255 | nht_p.u.prefix4 = up->upstream_addr; | |
23fc858a | 256 | if (PIM_DEBUG_PIM_TRACE) { |
246445a3 SP |
257 | char buf[PREFIX2STR_BUFFER]; |
258 | prefix2str(&nht_p, buf, sizeof(buf)); | |
259 | zlog_debug("%s: Deregister upstream %s addr %s with Zebra NHT", | |
260 | __PRETTY_FUNCTION__, up->sg_str, buf); | |
261 | } | |
4533b847 | 262 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL, false); |
d62a17ae | 263 | } |
d62a17ae | 264 | |
172e45dc | 265 | XFREE(MTYPE_PIM_UPSTREAM, up); |
d62a17ae | 266 | |
267 | return NULL; | |
12e41d03 DL |
268 | } |
269 | ||
d62a17ae | 270 | void pim_upstream_send_join(struct pim_upstream *up) |
12e41d03 | 271 | { |
957d93ea | 272 | if (!up->rpf.source_nexthop.interface) { |
23fc858a | 273 | if (PIM_DEBUG_PIM_TRACE) |
957d93ea SP |
274 | zlog_debug("%s: up %s RPF is not present", |
275 | __PRETTY_FUNCTION__, up->sg_str); | |
276 | return; | |
277 | } | |
278 | ||
23fc858a | 279 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 280 | char rpf_str[PREFIX_STRLEN]; |
281 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, | |
282 | sizeof(rpf_str)); | |
283 | zlog_debug("%s: RPF'%s=%s(%s) for Interface %s", | |
284 | __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
285 | pim_upstream_state2str(up->join_state), | |
286 | up->rpf.source_nexthop.interface->name); | |
287 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
288 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", | |
289 | __PRETTY_FUNCTION__, up->sg_str, rpf_str); | |
290 | /* warning only */ | |
291 | } | |
292 | } | |
293 | ||
294 | /* send Join(S,G) to the current upstream neighbor */ | |
295 | pim_jp_agg_single_upstream_send(&up->rpf, up, 1 /* join */); | |
12e41d03 DL |
296 | } |
297 | ||
298 | static int on_join_timer(struct thread *t) | |
299 | { | |
d62a17ae | 300 | struct pim_upstream *up; |
12e41d03 | 301 | |
d62a17ae | 302 | up = THREAD_ARG(t); |
12e41d03 | 303 | |
957d93ea | 304 | if (!up->rpf.source_nexthop.interface) { |
23fc858a | 305 | if (PIM_DEBUG_PIM_TRACE) |
957d93ea SP |
306 | zlog_debug("%s: up %s RPF is not present", |
307 | __PRETTY_FUNCTION__, up->sg_str); | |
308 | return 0; | |
309 | } | |
310 | ||
d62a17ae | 311 | /* |
312 | * In the case of a HFR we will not ahve anyone to send this to. | |
313 | */ | |
314 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) | |
315 | return 0; | |
bb6e291f | 316 | |
d62a17ae | 317 | /* |
318 | * Don't send the join if the outgoing interface is a loopback | |
319 | * But since this might change leave the join timer running | |
320 | */ | |
321 | if (up->rpf.source_nexthop | |
322 | .interface && !if_is_loopback(up->rpf.source_nexthop.interface)) | |
323 | pim_upstream_send_join(up); | |
12e41d03 | 324 | |
d62a17ae | 325 | join_timer_start(up); |
12e41d03 | 326 | |
d62a17ae | 327 | return 0; |
12e41d03 DL |
328 | } |
329 | ||
982bff89 | 330 | static void join_timer_stop(struct pim_upstream *up) |
12e41d03 | 331 | { |
47e3ce59 | 332 | struct pim_neighbor *nbr = NULL; |
957d93ea | 333 | |
d62a17ae | 334 | THREAD_OFF(up->t_join_timer); |
7eb90689 | 335 | |
47e3ce59 SP |
336 | if (up->rpf.source_nexthop.interface) |
337 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, | |
338 | up->rpf.rpf_addr.u.prefix4); | |
982bff89 | 339 | |
d62a17ae | 340 | if (nbr) |
c5cdf069 | 341 | pim_jp_agg_remove_group(nbr->upstream_jp_agg, up, nbr); |
982bff89 | 342 | |
d62a17ae | 343 | pim_jp_agg_upstream_verification(up, false); |
982bff89 DS |
344 | } |
345 | ||
d62a17ae | 346 | void join_timer_start(struct pim_upstream *up) |
982bff89 | 347 | { |
d62a17ae | 348 | struct pim_neighbor *nbr = NULL; |
349 | ||
350 | if (up->rpf.source_nexthop.interface) { | |
351 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, | |
352 | up->rpf.rpf_addr.u.prefix4); | |
353 | ||
354 | if (PIM_DEBUG_PIM_EVENTS) { | |
355 | zlog_debug( | |
356 | "%s: starting %d sec timer for upstream (S,G)=%s", | |
5b45753e | 357 | __PRETTY_FUNCTION__, router->t_periodic, |
d62a17ae | 358 | up->sg_str); |
359 | } | |
360 | } | |
361 | ||
362 | if (nbr) | |
c5cdf069 | 363 | pim_jp_agg_add_group(nbr->upstream_jp_agg, up, 1, nbr); |
d62a17ae | 364 | else { |
365 | THREAD_OFF(up->t_join_timer); | |
36417fcc | 366 | thread_add_timer(router->master, on_join_timer, up, |
5b45753e | 367 | router->t_periodic, &up->t_join_timer); |
d62a17ae | 368 | } |
369 | pim_jp_agg_upstream_verification(up, true); | |
12e41d03 DL |
370 | } |
371 | ||
982bff89 DS |
372 | /* |
373 | * This is only called when we are switching the upstream | |
374 | * J/P from one neighbor to another | |
375 | * | |
376 | * As such we need to remove from the old list and | |
377 | * add to the new list. | |
378 | */ | |
d62a17ae | 379 | void pim_upstream_join_timer_restart(struct pim_upstream *up, |
380 | struct pim_rpf *old) | |
12e41d03 | 381 | { |
d62a17ae | 382 | // THREAD_OFF(up->t_join_timer); |
383 | join_timer_start(up); | |
12e41d03 DL |
384 | } |
385 | ||
386 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
387 | int interval_msec) | |
388 | { | |
d62a17ae | 389 | if (PIM_DEBUG_PIM_EVENTS) { |
390 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", | |
391 | __PRETTY_FUNCTION__, interval_msec, up->sg_str); | |
392 | } | |
393 | ||
394 | THREAD_OFF(up->t_join_timer); | |
36417fcc | 395 | thread_add_timer_msec(router->master, on_join_timer, up, interval_msec, |
d62a17ae | 396 | &up->t_join_timer); |
12e41d03 DL |
397 | } |
398 | ||
399 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
d62a17ae | 400 | struct in_addr rpf_addr, int holdtime) |
12e41d03 | 401 | { |
d62a17ae | 402 | long t_joinsuppress_msec; |
403 | long join_timer_remain_msec; | |
404 | ||
957d93ea | 405 | if (!up->rpf.source_nexthop.interface) { |
23fc858a | 406 | if (PIM_DEBUG_PIM_TRACE) |
957d93ea SP |
407 | zlog_debug("%s: up %s RPF is not present", |
408 | __PRETTY_FUNCTION__, up->sg_str); | |
409 | return; | |
410 | } | |
411 | ||
d62a17ae | 412 | t_joinsuppress_msec = |
413 | MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
414 | 1000 * holdtime); | |
415 | ||
416 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
417 | ||
23fc858a | 418 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 419 | char rpf_str[INET_ADDRSTRLEN]; |
420 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); | |
421 | zlog_debug( | |
422 | "%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", | |
423 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
424 | join_timer_remain_msec, t_joinsuppress_msec); | |
425 | } | |
426 | ||
427 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
23fc858a | 428 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 429 | zlog_debug( |
430 | "%s %s: suppressing Join(S,G)=%s for %ld msec", | |
431 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, | |
432 | t_joinsuppress_msec); | |
433 | } | |
434 | ||
435 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
436 | } | |
12e41d03 DL |
437 | } |
438 | ||
439 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
d62a17ae | 440 | struct pim_upstream *up) |
12e41d03 | 441 | { |
d62a17ae | 442 | long join_timer_remain_msec; |
443 | int t_override_msec; | |
444 | ||
957d93ea | 445 | if (!up->rpf.source_nexthop.interface) { |
23fc858a | 446 | if (PIM_DEBUG_PIM_TRACE) |
957d93ea SP |
447 | zlog_debug("%s: up %s RPF is not present", |
448 | __PRETTY_FUNCTION__, up->sg_str); | |
449 | return; | |
450 | } | |
451 | ||
d62a17ae | 452 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); |
453 | t_override_msec = | |
454 | pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
455 | ||
23fc858a | 456 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 457 | char rpf_str[INET_ADDRSTRLEN]; |
458 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr.u.prefix4, rpf_str, | |
459 | sizeof(rpf_str)); | |
460 | zlog_debug( | |
461 | "%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", | |
462 | debug_label, up->sg_str, rpf_str, | |
463 | join_timer_remain_msec, t_override_msec); | |
464 | } | |
465 | ||
466 | if (join_timer_remain_msec > t_override_msec) { | |
23fc858a | 467 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 468 | zlog_debug( |
469 | "%s: decreasing (S,G)=%s join timer to t_override=%d msec", | |
470 | debug_label, up->sg_str, t_override_msec); | |
471 | } | |
472 | ||
473 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
474 | } | |
12e41d03 DL |
475 | } |
476 | ||
477 | static void forward_on(struct pim_upstream *up) | |
478 | { | |
d62a17ae | 479 | struct listnode *chnode; |
480 | struct listnode *chnextnode; | |
481 | struct pim_ifchannel *ch = NULL; | |
12e41d03 | 482 | |
d62a17ae | 483 | /* scan (S,G) state */ |
484 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
485 | if (pim_macro_chisin_oiflist(ch)) | |
486 | pim_forward_start(ch); | |
12e41d03 | 487 | |
d62a17ae | 488 | } /* scan iface channel list */ |
12e41d03 DL |
489 | } |
490 | ||
491 | static void forward_off(struct pim_upstream *up) | |
492 | { | |
d62a17ae | 493 | struct listnode *chnode; |
494 | struct listnode *chnextnode; | |
495 | struct pim_ifchannel *ch; | |
12e41d03 | 496 | |
d62a17ae | 497 | /* scan per-interface (S,G) state */ |
498 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
12e41d03 | 499 | |
aabb9a2f | 500 | pim_forward_stop(ch, false); |
12e41d03 | 501 | |
d62a17ae | 502 | } /* scan iface channel list */ |
12e41d03 DL |
503 | } |
504 | ||
d62a17ae | 505 | static int pim_upstream_could_register(struct pim_upstream *up) |
bb6e291f | 506 | { |
d62a17ae | 507 | struct pim_interface *pim_ifp = NULL; |
508 | ||
8eeaef9b AK |
509 | /* FORCE_PIMREG is a generic flag to let an app like VxLAN-AA register |
510 | * a source on an upstream entry even if the source is not directly | |
511 | * connected on the IIF. | |
512 | */ | |
513 | if (PIM_UPSTREAM_FLAG_TEST_FORCE_PIMREG(up->flags)) | |
514 | return 1; | |
515 | ||
d62a17ae | 516 | if (up->rpf.source_nexthop.interface) |
517 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
518 | else { | |
23fc858a | 519 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 520 | zlog_debug("%s: up %s RPF is not present", |
521 | __PRETTY_FUNCTION__, up->sg_str); | |
522 | } | |
bb6e291f | 523 | |
d62a17ae | 524 | if (pim_ifp && PIM_I_am_DR(pim_ifp) |
525 | && pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
526 | up->sg.src)) | |
527 | return 1; | |
bb6e291f | 528 | |
d62a17ae | 529 | return 0; |
bb6e291f DS |
530 | } |
531 | ||
0437e105 | 532 | /* Source registration is suppressed for SSM groups. When the SSM range changes |
15a5dafe | 533 | * we re-revaluate register setup for existing upstream entries */ |
9b29ea95 | 534 | void pim_upstream_register_reevaluate(struct pim_instance *pim) |
15a5dafe | 535 | { |
d62a17ae | 536 | struct listnode *upnode; |
537 | struct pim_upstream *up; | |
538 | ||
9b29ea95 | 539 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
d62a17ae | 540 | /* If FHR is set CouldRegister is True. Also check if the flow |
541 | * is actually active; if it is not kat setup will trigger | |
542 | * source | |
543 | * registration whenever the flow becomes active. */ | |
ec836533 AK |
544 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) || |
545 | !pim_upstream_is_kat_running(up)) | |
d62a17ae | 546 | continue; |
547 | ||
6f439a70 | 548 | if (pim_is_grp_ssm(pim, up->sg.grp)) { |
d62a17ae | 549 | /* clear the register state for SSM groups */ |
550 | if (up->reg_state != PIM_REG_NOINFO) { | |
551 | if (PIM_DEBUG_PIM_EVENTS) | |
552 | zlog_debug( | |
553 | "Clear register for %s as G is now SSM", | |
554 | up->sg_str); | |
555 | /* remove regiface from the OIL if it is there*/ | |
556 | pim_channel_del_oif(up->channel_oil, | |
9b29ea95 | 557 | pim->regiface, |
1b249e70 AK |
558 | PIM_OIF_FLAG_PROTO_PIM, |
559 | __func__); | |
d62a17ae | 560 | up->reg_state = PIM_REG_NOINFO; |
561 | } | |
562 | } else { | |
563 | /* register ASM sources with the RP */ | |
564 | if (up->reg_state == PIM_REG_NOINFO) { | |
565 | if (PIM_DEBUG_PIM_EVENTS) | |
566 | zlog_debug( | |
567 | "Register %s as G is now ASM", | |
568 | up->sg_str); | |
569 | pim_channel_add_oif(up->channel_oil, | |
9b29ea95 | 570 | pim->regiface, |
1b249e70 AK |
571 | PIM_OIF_FLAG_PROTO_PIM, |
572 | __func__); | |
d62a17ae | 573 | up->reg_state = PIM_REG_JOIN; |
574 | } | |
575 | } | |
576 | } | |
15a5dafe | 577 | } |
578 | ||
69e3538c AK |
579 | /* RFC7761, Section 4.2 “Data Packet Forwarding Rules” says we should |
580 | * forward a S - | |
581 | * 1. along the SPT if SPTbit is set | |
582 | * 2. and along the RPT if SPTbit is not set | |
583 | * If forwarding is hw accelerated i.e. control and dataplane components | |
584 | * are separate you may not be able to reliably set SPT bit on intermediate | |
585 | * routers while still fowarding on the (S,G,rpt). | |
586 | * | |
587 | * This macro is a slight deviation on the RFC and uses "traffic-agnostic" | |
588 | * criteria to decide between using the RPT vs. SPT for forwarding. | |
589 | */ | |
590 | void pim_upstream_update_use_rpt(struct pim_upstream *up, | |
591 | bool update_mroute) | |
592 | { | |
593 | bool old_use_rpt; | |
594 | bool new_use_rpt; | |
595 | ||
596 | if (up->sg.src.s_addr == INADDR_ANY) | |
597 | return; | |
598 | ||
599 | old_use_rpt = !!PIM_UPSTREAM_FLAG_TEST_USE_RPT(up->flags); | |
600 | ||
601 | /* We will use the SPT (IIF=RPF_interface(S) if - | |
602 | * 1. We have decided to join the SPT | |
603 | * 2. We are FHR | |
604 | * 3. Source is directly connected | |
605 | * 4. We are RP (parent's IIF is lo or vrf-device) | |
606 | * In all other cases the source will stay along the RPT and | |
607 | * IIF=RPF_interface(RP). | |
608 | */ | |
609 | if (up->join_state == PIM_UPSTREAM_JOINED || | |
610 | PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) || | |
611 | pim_if_connected_to_source( | |
612 | up->rpf.source_nexthop.interface, | |
613 | up->sg.src) || | |
614 | /* XXX - need to switch this to a more efficient | |
615 | * lookup API | |
616 | */ | |
617 | I_am_RP(up->pim, up->sg.grp)) | |
618 | /* use SPT */ | |
619 | PIM_UPSTREAM_FLAG_UNSET_USE_RPT(up->flags); | |
620 | else | |
621 | /* use RPT */ | |
622 | PIM_UPSTREAM_FLAG_SET_USE_RPT(up->flags); | |
623 | ||
624 | new_use_rpt = !!PIM_UPSTREAM_FLAG_TEST_USE_RPT(up->flags); | |
625 | if (old_use_rpt != new_use_rpt) { | |
626 | if (PIM_DEBUG_PIM_EVENTS) | |
627 | zlog_debug("%s switched from %s to %s", | |
628 | up->sg_str, | |
629 | old_use_rpt?"RPT":"SPT", | |
630 | new_use_rpt?"RPT":"SPT"); | |
631 | if (update_mroute) | |
632 | pim_upstream_mroute_add(up->channel_oil, __func__); | |
633 | } | |
634 | } | |
635 | ||
a749b900 AK |
636 | /* some events like RP change require re-evaluation of SGrpt across |
637 | * all groups | |
638 | */ | |
639 | void pim_upstream_reeval_use_rpt(struct pim_instance *pim) | |
640 | { | |
641 | struct pim_upstream *up; | |
642 | struct listnode *node; | |
643 | ||
644 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { | |
645 | if (up->sg.src.s_addr == INADDR_ANY) | |
646 | continue; | |
647 | ||
648 | pim_upstream_update_use_rpt(up, true /*update_mroute*/); | |
649 | } | |
650 | } | |
651 | ||
1eca8576 | 652 | void pim_upstream_switch(struct pim_instance *pim, struct pim_upstream *up, |
d62a17ae | 653 | enum pim_upstream_state new_state) |
12e41d03 | 654 | { |
d62a17ae | 655 | enum pim_upstream_state old_state = up->join_state; |
656 | ||
957d93ea | 657 | if (up->upstream_addr.s_addr == INADDR_ANY) { |
47e3ce59 SP |
658 | if (PIM_DEBUG_PIM_EVENTS) |
659 | zlog_debug("%s: RPF not configured for %s", | |
660 | __PRETTY_FUNCTION__, up->sg_str); | |
957d93ea SP |
661 | return; |
662 | } | |
663 | ||
664 | if (!up->rpf.source_nexthop.interface) { | |
47e3ce59 SP |
665 | if (PIM_DEBUG_PIM_EVENTS) |
666 | zlog_debug("%s: RP not reachable for %s", | |
667 | __PRETTY_FUNCTION__, up->sg_str); | |
957d93ea SP |
668 | return; |
669 | } | |
670 | ||
d62a17ae | 671 | if (PIM_DEBUG_PIM_EVENTS) { |
672 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", | |
673 | __PRETTY_FUNCTION__, up->sg_str, | |
674 | pim_upstream_state2str(up->join_state), | |
675 | pim_upstream_state2str(new_state)); | |
676 | } | |
677 | ||
678 | up->join_state = new_state; | |
679 | if (old_state != new_state) | |
680 | up->state_transition = pim_time_monotonic_sec(); | |
681 | ||
682 | pim_upstream_update_assert_tracking_desired(up); | |
683 | ||
684 | if (new_state == PIM_UPSTREAM_JOINED) { | |
b077f571 | 685 | pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 686 | if (old_state != PIM_UPSTREAM_JOINED) { |
687 | int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags); | |
b077f571 | 688 | |
1eca8576 | 689 | pim_msdp_up_join_state_changed(pim, up); |
d62a17ae | 690 | if (pim_upstream_could_register(up)) { |
691 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
692 | if (!old_fhr | |
693 | && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM( | |
694 | up->flags)) { | |
695 | pim_upstream_keep_alive_timer_start( | |
19b807ca | 696 | up, pim->keep_alive_time); |
d62a17ae | 697 | pim_register_join(up); |
698 | } | |
699 | } else { | |
700 | pim_upstream_send_join(up); | |
701 | join_timer_start(up); | |
702 | } | |
d62a17ae | 703 | } |
c692bd2a AK |
704 | if (old_state != new_state) |
705 | pim_upstream_update_use_rpt(up, true /*update_mroute*/); | |
d62a17ae | 706 | } else { |
c692bd2a AK |
707 | bool old_use_rpt; |
708 | bool new_use_rpt; | |
709 | bool send_xg_jp = false; | |
d62a17ae | 710 | |
711 | forward_off(up); | |
712 | if (old_state == PIM_UPSTREAM_JOINED) | |
1eca8576 | 713 | pim_msdp_up_join_state_changed(pim, up); |
d62a17ae | 714 | |
c692bd2a AK |
715 | if (old_state != new_state) { |
716 | old_use_rpt = | |
717 | !!PIM_UPSTREAM_FLAG_TEST_USE_RPT(up->flags); | |
718 | pim_upstream_update_use_rpt(up, true /*update_mroute*/); | |
719 | new_use_rpt = | |
720 | !!PIM_UPSTREAM_FLAG_TEST_USE_RPT(up->flags); | |
721 | if (new_use_rpt && | |
722 | (new_use_rpt != old_use_rpt) && | |
723 | up->parent) | |
724 | /* we have decided to switch from the SPT back | |
725 | * to the RPT which means we need to cancel | |
726 | * any previously sent SGrpt prunes immediately | |
727 | */ | |
728 | send_xg_jp = true; | |
729 | } | |
730 | ||
d62a17ae | 731 | /* IHR, Trigger SGRpt on *,G IIF to prune S,G from RPT towards |
732 | RP. | |
733 | If I am RP for G then send S,G prune to its IIF. */ | |
c692bd2a AK |
734 | if (pim_upstream_is_sg_rpt(up) && up->parent && |
735 | !I_am_RP(pim, up->sg.grp)) | |
736 | send_xg_jp = true; | |
737 | else | |
738 | pim_jp_agg_single_upstream_send(&up->rpf, up, | |
739 | 0 /* prune */); | |
740 | ||
741 | if (send_xg_jp) { | |
d62a17ae | 742 | if (PIM_DEBUG_PIM_TRACE_DETAIL) |
743 | zlog_debug( | |
c692bd2a | 744 | "re-join RPT; *,G IIF %s S,G IIF %s ", |
957d93ea SP |
745 | up->parent->rpf.source_nexthop.interface ? |
746 | up->parent->rpf.source_nexthop.interface->name | |
747 | : "Unknown", | |
748 | up->rpf.source_nexthop.interface ? | |
749 | up->rpf.source_nexthop.interface->name : | |
750 | "Unknown"); | |
d62a17ae | 751 | pim_jp_agg_single_upstream_send(&up->parent->rpf, |
752 | up->parent, | |
753 | 1 /* (W,G) Join */); | |
c692bd2a | 754 | } |
d62a17ae | 755 | join_timer_stop(up); |
756 | } | |
12e41d03 DL |
757 | } |
758 | ||
d62a17ae | 759 | int pim_upstream_compare(void *arg1, void *arg2) |
03417ccd | 760 | { |
d62a17ae | 761 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
762 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
03417ccd | 763 | |
d62a17ae | 764 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) |
765 | return -1; | |
03417ccd | 766 | |
d62a17ae | 767 | if (ntohl(up1->sg.grp.s_addr) > ntohl(up2->sg.grp.s_addr)) |
768 | return 1; | |
03417ccd | 769 | |
d62a17ae | 770 | if (ntohl(up1->sg.src.s_addr) < ntohl(up2->sg.src.s_addr)) |
771 | return -1; | |
03417ccd | 772 | |
d62a17ae | 773 | if (ntohl(up1->sg.src.s_addr) > ntohl(up2->sg.src.s_addr)) |
774 | return 1; | |
03417ccd | 775 | |
d62a17ae | 776 | return 0; |
03417ccd DS |
777 | } |
778 | ||
6a5de0ad AK |
779 | void pim_upstream_fill_static_iif(struct pim_upstream *up, |
780 | struct interface *incoming) | |
781 | { | |
782 | up->rpf.source_nexthop.interface = incoming; | |
783 | ||
784 | /* reset other parameters to matched a connected incoming interface */ | |
785 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; | |
786 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = | |
787 | PIM_NET_INADDR_ANY; | |
788 | up->rpf.source_nexthop.mrib_metric_preference = | |
789 | ZEBRA_CONNECT_DISTANCE_DEFAULT; | |
790 | up->rpf.source_nexthop.mrib_route_metric = 0; | |
791 | up->rpf.rpf_addr.family = AF_INET; | |
792 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
793 | ||
794 | } | |
795 | ||
2002dcdb DS |
796 | static struct pim_upstream *pim_upstream_new(struct pim_instance *pim, |
797 | struct prefix_sg *sg, | |
798 | struct interface *incoming, | |
0885a9f1 DS |
799 | int flags, |
800 | struct pim_ifchannel *ch) | |
12e41d03 | 801 | { |
d62a17ae | 802 | enum pim_rpf_result rpf_result; |
803 | struct pim_interface *pim_ifp; | |
804 | struct pim_upstream *up; | |
805 | ||
806 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); | |
d62a17ae | 807 | |
69e3538c | 808 | up->pim = pim; |
d62a17ae | 809 | up->sg = *sg; |
810 | pim_str_sg_set(sg, up->sg_str); | |
0885a9f1 DS |
811 | if (ch) |
812 | ch->upstream = up; | |
813 | ||
9b29ea95 | 814 | up = hash_get(pim->upstream_hash, up, hash_alloc_intern); |
732c209c SP |
815 | /* Set up->upstream_addr as INADDR_ANY, if RP is not |
816 | * configured and retain the upstream data structure | |
817 | */ | |
d9c9a9ee DS |
818 | if (!pim_rp_set_upstream_addr(pim, &up->upstream_addr, sg->src, |
819 | sg->grp)) { | |
23fc858a | 820 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 821 | zlog_debug("%s: Received a (*,G) with no RP configured", |
822 | __PRETTY_FUNCTION__); | |
d62a17ae | 823 | } |
824 | ||
9b29ea95 | 825 | up->parent = pim_upstream_find_parent(pim, up); |
d62a17ae | 826 | if (up->sg.src.s_addr == INADDR_ANY) { |
827 | up->sources = list_new(); | |
828 | up->sources->cmp = pim_upstream_compare; | |
829 | } else | |
830 | up->sources = NULL; | |
831 | ||
9b29ea95 | 832 | pim_upstream_find_new_children(pim, up); |
d62a17ae | 833 | up->flags = flags; |
834 | up->ref_count = 1; | |
835 | up->t_join_timer = NULL; | |
836 | up->t_ka_timer = NULL; | |
837 | up->t_rs_timer = NULL; | |
838 | up->t_msdp_reg_timer = NULL; | |
839 | up->join_state = PIM_UPSTREAM_NOTJOINED; | |
840 | up->reg_state = PIM_REG_NOINFO; | |
841 | up->state_transition = pim_time_monotonic_sec(); | |
46dd6edb | 842 | up->channel_oil = |
7984af18 | 843 | pim_channel_oil_add(pim, &up->sg, __PRETTY_FUNCTION__); |
d62a17ae | 844 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; |
845 | ||
846 | up->rpf.source_nexthop.interface = NULL; | |
847 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; | |
848 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = | |
849 | PIM_NET_INADDR_ANY; | |
850 | up->rpf.source_nexthop.mrib_metric_preference = | |
d17612dd | 851 | router->infinite_assert_metric.metric_preference; |
d62a17ae | 852 | up->rpf.source_nexthop.mrib_route_metric = |
d17612dd | 853 | router->infinite_assert_metric.route_metric; |
d62a17ae | 854 | up->rpf.rpf_addr.family = AF_INET; |
855 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
856 | ||
857 | up->ifchannels = list_new(); | |
858 | up->ifchannels->cmp = (int (*)(void *, void *))pim_ifchannel_compare; | |
859 | ||
860 | if (up->sg.src.s_addr != INADDR_ANY) | |
9b29ea95 | 861 | wheel_add_item(pim->upstream_sg_wheel, up); |
d62a17ae | 862 | |
02434c43 DS |
863 | if (PIM_UPSTREAM_FLAG_TEST_STATIC_IIF(up->flags) |
864 | || PIM_UPSTREAM_FLAG_TEST_SRC_NOCACHE(up->flags)) { | |
6a5de0ad AK |
865 | pim_upstream_fill_static_iif(up, incoming); |
866 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
867 | assert(pim_ifp); | |
35d6862d AK |
868 | pim_upstream_update_use_rpt(up, |
869 | false /*update_mroute*/); | |
7984af18 | 870 | pim_upstream_mroute_iif_update(up->channel_oil, __func__); |
02434c43 DS |
871 | |
872 | if (PIM_UPSTREAM_FLAG_TEST_SRC_NOCACHE(up->flags)) | |
873 | pim_upstream_keep_alive_timer_start( | |
874 | up, pim->keep_alive_time); | |
46dd6edb | 875 | } else if (up->upstream_addr.s_addr != INADDR_ANY) { |
35d6862d AK |
876 | pim_upstream_update_use_rpt(up, |
877 | false /*update_mroute*/); | |
8c55c132 | 878 | rpf_result = pim_rpf_update(pim, up, NULL, __func__); |
732c209c | 879 | if (rpf_result == PIM_RPF_FAILURE) { |
23fc858a | 880 | if (PIM_DEBUG_PIM_TRACE) |
732c209c SP |
881 | zlog_debug( |
882 | "%s: Attempting to create upstream(%s), Unable to RPF for source", | |
883 | __PRETTY_FUNCTION__, up->sg_str); | |
d62a17ae | 884 | } |
885 | ||
732c209c SP |
886 | if (up->rpf.source_nexthop.interface) { |
887 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
35d6862d AK |
888 | pim_upstream_mroute_iif_update(up->channel_oil, |
889 | __func__); | |
732c209c | 890 | } |
d62a17ae | 891 | } |
892 | ||
9b29ea95 | 893 | listnode_add_sort(pim->upstream_list, up); |
d62a17ae | 894 | |
23fc858a | 895 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 896 | zlog_debug( |
897 | "%s: Created Upstream %s upstream_addr %s ref count %d increment", | |
898 | __PRETTY_FUNCTION__, up->sg_str, | |
899 | inet_ntoa(up->upstream_addr), up->ref_count); | |
900 | } | |
901 | ||
902 | return up; | |
12e41d03 DL |
903 | } |
904 | ||
9b29ea95 DS |
905 | struct pim_upstream *pim_upstream_find(struct pim_instance *pim, |
906 | struct prefix_sg *sg) | |
12e41d03 | 907 | { |
d62a17ae | 908 | struct pim_upstream lookup; |
909 | struct pim_upstream *up = NULL; | |
12e41d03 | 910 | |
d62a17ae | 911 | lookup.sg = *sg; |
9b29ea95 | 912 | up = hash_lookup(pim->upstream_hash, &lookup); |
d62a17ae | 913 | return up; |
12e41d03 DL |
914 | } |
915 | ||
d62a17ae | 916 | struct pim_upstream *pim_upstream_find_or_add(struct prefix_sg *sg, |
69e3538c AK |
917 | struct interface *incoming, |
918 | int flags, const char *name) | |
e711cd3c | 919 | { |
69e3538c | 920 | struct pim_interface *pim_ifp = incoming->info; |
d62a17ae | 921 | |
69e3538c AK |
922 | return (pim_upstream_add(pim_ifp->pim, sg, incoming, flags, name, |
923 | NULL)); | |
e711cd3c DS |
924 | } |
925 | ||
d62a17ae | 926 | void pim_upstream_ref(struct pim_upstream *up, int flags, const char *name) |
1bf16443 | 927 | { |
69e3538c AK |
928 | /* when we go from non-FHR to FHR we need to re-eval traffic |
929 | * forwarding path | |
930 | */ | |
931 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) && | |
932 | PIM_UPSTREAM_FLAG_TEST_FHR(flags)) { | |
933 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
934 | pim_upstream_update_use_rpt(up, true /*update_mroute*/); | |
935 | } | |
936 | ||
41a115e4 AK |
937 | /* re-eval joinDesired; clearing peer-msdp-sa flag can |
938 | * cause JD to change | |
939 | */ | |
940 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up->flags) && | |
941 | PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(flags)) { | |
942 | PIM_UPSTREAM_FLAG_SET_SRC_MSDP(up->flags); | |
943 | pim_upstream_update_join_desired(up->pim, up); | |
944 | } | |
945 | ||
d62a17ae | 946 | up->flags |= flags; |
947 | ++up->ref_count; | |
23fc858a | 948 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 949 | zlog_debug("%s(%s): upstream %s ref count %d increment", |
950 | __PRETTY_FUNCTION__, name, up->sg_str, | |
951 | up->ref_count); | |
1bf16443 | 952 | } |
953 | ||
2002dcdb DS |
954 | struct pim_upstream *pim_upstream_add(struct pim_instance *pim, |
955 | struct prefix_sg *sg, | |
d62a17ae | 956 | struct interface *incoming, int flags, |
0885a9f1 DS |
957 | const char *name, |
958 | struct pim_ifchannel *ch) | |
12e41d03 | 959 | { |
d62a17ae | 960 | struct pim_upstream *up = NULL; |
961 | int found = 0; | |
9b29ea95 | 962 | |
2002dcdb | 963 | up = pim_upstream_find(pim, sg); |
d62a17ae | 964 | if (up) { |
965 | pim_upstream_ref(up, flags, name); | |
966 | found = 1; | |
967 | } else { | |
0885a9f1 | 968 | up = pim_upstream_new(pim, sg, incoming, flags, ch); |
d62a17ae | 969 | } |
970 | ||
23fc858a | 971 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 972 | if (up) { |
973 | char buf[PREFIX2STR_BUFFER]; | |
974 | prefix2str(&up->rpf.rpf_addr, buf, sizeof(buf)); | |
975 | zlog_debug("%s(%s): %s, iif %s (%s) found: %d: ref_count: %d", | |
f4075cb4 | 976 | __PRETTY_FUNCTION__, name, |
55785900 | 977 | up->sg_str, buf, up->rpf.source_nexthop.interface ? |
957d93ea | 978 | up->rpf.source_nexthop.interface->name : "Unknown" , |
55785900 | 979 | found, up->ref_count); |
d62a17ae | 980 | } else |
981 | zlog_debug("%s(%s): (%s) failure to create", | |
982 | __PRETTY_FUNCTION__, name, | |
983 | pim_str_sg_dump(sg)); | |
984 | } | |
12e41d03 | 985 | |
d62a17ae | 986 | return up; |
12e41d03 DL |
987 | } |
988 | ||
a53a9b3e AK |
989 | /* |
990 | * Passed in up must be the upstream for ch. starch is NULL if no | |
991 | * information | |
992 | * This function is copied over from | |
993 | * pim_upstream_evaluate_join_desired_interface but limited to | |
994 | * parent (*,G)'s includes/joins. | |
995 | */ | |
996 | int pim_upstream_eval_inherit_if(struct pim_upstream *up, | |
997 | struct pim_ifchannel *ch, | |
998 | struct pim_ifchannel *starch) | |
999 | { | |
1000 | /* if there is an explicit prune for this interface we cannot | |
1001 | * add it to the OIL | |
1002 | */ | |
1003 | if (ch) { | |
1004 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
1005 | return 0; | |
1006 | } | |
1007 | ||
1008 | /* Check if the OIF can be inherited fron the (*,G) entry | |
1009 | */ | |
1010 | if (starch) { | |
1011 | if (!pim_macro_ch_lost_assert(starch) | |
1012 | && pim_macro_chisin_joins_or_include(starch)) | |
1013 | return 1; | |
1014 | } | |
1015 | ||
1016 | return 0; | |
1017 | } | |
1018 | ||
c8fc07cb DS |
1019 | /* |
1020 | * Passed in up must be the upstream for ch. starch is NULL if no | |
1021 | * information | |
1022 | */ | |
d62a17ae | 1023 | int pim_upstream_evaluate_join_desired_interface(struct pim_upstream *up, |
1024 | struct pim_ifchannel *ch, | |
1025 | struct pim_ifchannel *starch) | |
7a3ddda5 | 1026 | { |
d62a17ae | 1027 | if (ch) { |
1028 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
1029 | return 0; | |
1030 | ||
1031 | if (!pim_macro_ch_lost_assert(ch) | |
1032 | && pim_macro_chisin_joins_or_include(ch)) | |
1033 | return 1; | |
1034 | } | |
1035 | ||
1036 | /* | |
1037 | * joins (*,G) | |
1038 | */ | |
1039 | if (starch) { | |
a53a9b3e AK |
1040 | /* XXX: check on this with donald |
1041 | * we are looking for PIM_IF_FLAG_MASK_S_G_RPT in | |
1042 | * upstream flags? | |
1043 | */ | |
1044 | #if 0 | |
d62a17ae | 1045 | if (PIM_IF_FLAG_TEST_S_G_RPT(starch->upstream->flags)) |
1046 | return 0; | |
a53a9b3e | 1047 | #endif |
d62a17ae | 1048 | |
1049 | if (!pim_macro_ch_lost_assert(starch) | |
1050 | && pim_macro_chisin_joins_or_include(starch)) | |
1051 | return 1; | |
1052 | } | |
1053 | ||
1054 | return 0; | |
7a3ddda5 DS |
1055 | } |
1056 | ||
a53a9b3e AK |
1057 | /* Returns true if immediate OIL is empty and is used to evaluate |
1058 | * JoinDesired. See pim_upstream_evaluate_join_desired. | |
12e41d03 | 1059 | */ |
a53a9b3e | 1060 | static bool pim_upstream_empty_immediate_olist(struct pim_instance *pim, |
9b29ea95 | 1061 | struct pim_upstream *up) |
12e41d03 | 1062 | { |
d62a17ae | 1063 | struct interface *ifp; |
a53a9b3e | 1064 | struct pim_ifchannel *ch; |
12e41d03 | 1065 | |
451fda4f | 1066 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
d62a17ae | 1067 | if (!ifp->info) |
1068 | continue; | |
c8fc07cb | 1069 | |
d62a17ae | 1070 | ch = pim_ifchannel_find(ifp, &up->sg); |
a53a9b3e | 1071 | if (!ch) |
d62a17ae | 1072 | continue; |
12e41d03 | 1073 | |
a53a9b3e AK |
1074 | /* If we have even one immediate OIF we can return with |
1075 | * not-empty | |
1076 | */ | |
1077 | if (pim_upstream_evaluate_join_desired_interface(up, ch, | |
1078 | NULL /* starch */)) | |
1079 | return false; | |
d62a17ae | 1080 | } /* scan iface channel list */ |
12e41d03 | 1081 | |
a53a9b3e AK |
1082 | /* immediate_oil is empty */ |
1083 | return true; | |
1084 | } | |
1085 | ||
41a115e4 AK |
1086 | |
1087 | static inline bool pim_upstream_is_msdp_peer_sa(struct pim_upstream *up) | |
1088 | { | |
1089 | return PIM_UPSTREAM_FLAG_TEST_SRC_MSDP(up->flags); | |
1090 | } | |
1091 | ||
a53a9b3e AK |
1092 | /* |
1093 | * bool JoinDesired(*,G) { | |
1094 | * if (immediate_olist(*,G) != NULL) | |
1095 | * return TRUE | |
1096 | * else | |
1097 | * return FALSE | |
1098 | * } | |
1099 | * | |
1100 | * bool JoinDesired(S,G) { | |
1101 | * return( immediate_olist(S,G) != NULL | |
1102 | * OR ( KeepaliveTimer(S,G) is running | |
1103 | * AND inherited_olist(S,G) != NULL ) ) | |
1104 | * } | |
1105 | */ | |
1106 | int pim_upstream_evaluate_join_desired(struct pim_instance *pim, | |
1107 | struct pim_upstream *up) | |
1108 | { | |
1109 | bool empty_imm_oil; | |
1110 | bool empty_inh_oil; | |
1111 | ||
1112 | empty_imm_oil = pim_upstream_empty_immediate_olist(pim, up); | |
1113 | ||
1114 | /* (*,G) */ | |
1115 | if (up->sg.src.s_addr == INADDR_ANY) | |
1116 | return !empty_imm_oil; | |
1117 | ||
1118 | /* (S,G) */ | |
1119 | if (!empty_imm_oil) | |
1120 | return true; | |
1121 | empty_inh_oil = pim_upstream_empty_inherited_olist(up); | |
1122 | if (!empty_inh_oil && | |
1123 | (pim_upstream_is_kat_running(up) || | |
41a115e4 | 1124 | pim_upstream_is_msdp_peer_sa(up))) |
a53a9b3e AK |
1125 | return true; |
1126 | ||
1127 | return false; | |
12e41d03 DL |
1128 | } |
1129 | ||
1130 | /* | |
1131 | See also pim_upstream_evaluate_join_desired() above. | |
1132 | */ | |
9b29ea95 DS |
1133 | void pim_upstream_update_join_desired(struct pim_instance *pim, |
1134 | struct pim_upstream *up) | |
12e41d03 | 1135 | { |
d62a17ae | 1136 | int was_join_desired; /* boolean */ |
1137 | int is_join_desired; /* boolean */ | |
1138 | ||
1139 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
1140 | ||
9b29ea95 | 1141 | is_join_desired = pim_upstream_evaluate_join_desired(pim, up); |
d62a17ae | 1142 | if (is_join_desired) |
1143 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
1144 | else | |
1145 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
1146 | ||
1147 | /* switched from false to true */ | |
47e3ce59 | 1148 | if (is_join_desired && (up->join_state == PIM_UPSTREAM_NOTJOINED)) { |
1eca8576 | 1149 | pim_upstream_switch(pim, up, PIM_UPSTREAM_JOINED); |
d62a17ae | 1150 | return; |
1151 | } | |
1152 | ||
1153 | /* switched from true to false */ | |
1154 | if (!is_join_desired && was_join_desired) { | |
1eca8576 | 1155 | pim_upstream_switch(pim, up, PIM_UPSTREAM_NOTJOINED); |
d62a17ae | 1156 | return; |
1157 | } | |
12e41d03 DL |
1158 | } |
1159 | ||
1160 | /* | |
1161 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
1162 | Transitions from Joined State | |
1163 | RPF'(S,G) GenID changes | |
1164 | ||
1165 | The upstream (S,G) state machine remains in Joined state. If the | |
1166 | Join Timer is set to expire in more than t_override seconds, reset | |
1167 | it so that it expires after t_override seconds. | |
1168 | */ | |
9b29ea95 DS |
1169 | void pim_upstream_rpf_genid_changed(struct pim_instance *pim, |
1170 | struct in_addr neigh_addr) | |
12e41d03 | 1171 | { |
d62a17ae | 1172 | struct listnode *up_node; |
1173 | struct listnode *up_nextnode; | |
1174 | struct pim_upstream *up; | |
1175 | ||
1176 | /* | |
1177 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
1178 | */ | |
9b29ea95 | 1179 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { |
d62a17ae | 1180 | |
23fc858a | 1181 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 1182 | char neigh_str[INET_ADDRSTRLEN]; |
1183 | char rpf_addr_str[PREFIX_STRLEN]; | |
1184 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, | |
1185 | sizeof(neigh_str)); | |
1186 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, | |
1187 | sizeof(rpf_addr_str)); | |
1188 | zlog_debug( | |
8dbdb215 | 1189 | "%s: matching neigh=%s against upstream (S,G)=%s[%s] joined=%d rpf_addr=%s", |
996c9314 LB |
1190 | __PRETTY_FUNCTION__, neigh_str, up->sg_str, |
1191 | pim->vrf->name, | |
d62a17ae | 1192 | up->join_state == PIM_UPSTREAM_JOINED, |
1193 | rpf_addr_str); | |
1194 | } | |
1195 | ||
1196 | /* consider only (S,G) upstream in Joined state */ | |
1197 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
1198 | continue; | |
1199 | ||
1200 | /* match RPF'(S,G)=neigh_addr */ | |
1201 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) | |
1202 | continue; | |
1203 | ||
1204 | pim_upstream_join_timer_decrease_to_t_override( | |
1205 | "RPF'(S,G) GenID change", up); | |
1206 | } | |
12e41d03 DL |
1207 | } |
1208 | ||
1209 | ||
1210 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
1211 | struct interface *old_rpf_ifp) | |
1212 | { | |
d62a17ae | 1213 | struct listnode *chnode; |
1214 | struct listnode *chnextnode; | |
1215 | struct pim_ifchannel *ch; | |
1216 | ||
1217 | /* search all ifchannels */ | |
1218 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1219 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
1220 | if ( | |
1221 | /* RPF_interface(S) was NOT I */ | |
1222 | (old_rpf_ifp == ch->interface) && | |
1223 | /* RPF_interface(S) stopped being I */ | |
1224 | (ch->upstream->rpf.source_nexthop | |
957d93ea SP |
1225 | .interface) && |
1226 | (ch->upstream->rpf.source_nexthop | |
1227 | .interface != ch->interface)) { | |
d62a17ae | 1228 | assert_action_a5(ch); |
1229 | } | |
1230 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
1231 | ||
1232 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1233 | } | |
12e41d03 DL |
1234 | } |
1235 | ||
1236 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
1237 | { | |
d62a17ae | 1238 | struct listnode *chnode; |
1239 | struct listnode *chnextnode; | |
1240 | struct pim_ifchannel *ch; | |
1241 | ||
1242 | /* scan per-interface (S,G) state */ | |
1243 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1244 | pim_ifchannel_update_could_assert(ch); | |
1245 | } /* scan iface channel list */ | |
12e41d03 DL |
1246 | } |
1247 | ||
1248 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
1249 | { | |
d62a17ae | 1250 | struct listnode *chnode; |
1251 | struct listnode *chnextnode; | |
1252 | struct pim_ifchannel *ch; | |
12e41d03 | 1253 | |
d62a17ae | 1254 | /* scan per-interface (S,G) state */ |
1255 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1256 | pim_ifchannel_update_my_assert_metric(ch); | |
12e41d03 | 1257 | |
d62a17ae | 1258 | } /* scan iface channel list */ |
12e41d03 DL |
1259 | } |
1260 | ||
1261 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
1262 | { | |
d62a17ae | 1263 | struct listnode *chnode; |
1264 | struct listnode *chnextnode; | |
1265 | struct pim_interface *pim_ifp; | |
1266 | struct pim_ifchannel *ch; | |
1267 | ||
1268 | /* scan per-interface (S,G) state */ | |
1269 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1270 | if (!ch->interface) | |
1271 | continue; | |
1272 | pim_ifp = ch->interface->info; | |
1273 | if (!pim_ifp) | |
1274 | continue; | |
1275 | ||
1276 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1277 | ||
1278 | } /* scan iface channel list */ | |
12e41d03 | 1279 | } |
f14248dd | 1280 | |
1bf16443 | 1281 | /* When kat is stopped CouldRegister goes to false so we need to |
1282 | * transition the (S, G) on FHR to NI state and remove reg tunnel | |
1283 | * from the OIL */ | |
9b29ea95 DS |
1284 | static void pim_upstream_fhr_kat_expiry(struct pim_instance *pim, |
1285 | struct pim_upstream *up) | |
1bf16443 | 1286 | { |
d62a17ae | 1287 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
1288 | return; | |
1289 | ||
23fc858a | 1290 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1291 | zlog_debug("kat expired on %s; clear fhr reg state", |
1292 | up->sg_str); | |
1293 | ||
1294 | /* stop reg-stop timer */ | |
1295 | THREAD_OFF(up->t_rs_timer); | |
1296 | /* remove regiface from the OIL if it is there*/ | |
9b29ea95 | 1297 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
1b249e70 | 1298 | PIM_OIF_FLAG_PROTO_PIM, __func__); |
d62a17ae | 1299 | /* clear the register state */ |
1300 | up->reg_state = PIM_REG_NOINFO; | |
1301 | PIM_UPSTREAM_FLAG_UNSET_FHR(up->flags); | |
1bf16443 | 1302 | } |
1303 | ||
1304 | /* When kat is started CouldRegister can go to true. And if it does we | |
1305 | * need to transition the (S, G) on FHR to JOINED state and add reg tunnel | |
1306 | * to the OIL */ | |
1307 | static void pim_upstream_fhr_kat_start(struct pim_upstream *up) | |
1308 | { | |
d62a17ae | 1309 | if (pim_upstream_could_register(up)) { |
23fc858a | 1310 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1311 | zlog_debug( |
1312 | "kat started on %s; set fhr reg state to joined", | |
1313 | up->sg_str); | |
1314 | ||
1315 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
1316 | if (up->reg_state == PIM_REG_NOINFO) | |
1317 | pim_register_join(up); | |
69e3538c | 1318 | pim_upstream_update_use_rpt(up, true /*update_mroute*/); |
d62a17ae | 1319 | } |
1bf16443 | 1320 | } |
1321 | ||
f14248dd DS |
1322 | /* |
1323 | * On an RP, the PMBR value must be cleared when the | |
1324 | * Keepalive Timer expires | |
1bf16443 | 1325 | * KAT expiry indicates that flow is inactive. If the flow was created or |
1326 | * maintained by activity now is the time to deref it. | |
f14248dd | 1327 | */ |
ff459c36 AK |
1328 | struct pim_upstream *pim_upstream_keep_alive_timer_proc( |
1329 | struct pim_upstream *up) | |
f14248dd | 1330 | { |
8e5f97e3 | 1331 | struct pim_instance *pim; |
d62a17ae | 1332 | |
8e5f97e3 | 1333 | pim = up->channel_oil->pim; |
d62a17ae | 1334 | |
820b4a40 AK |
1335 | if (PIM_UPSTREAM_FLAG_TEST_DISABLE_KAT_EXPIRY(up->flags)) { |
1336 | /* if the router is a PIM vxlan encapsulator we prevent expiry | |
1337 | * of KAT as the mroute is pre-setup without any traffic | |
1338 | */ | |
1339 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); | |
ff459c36 | 1340 | return up; |
820b4a40 AK |
1341 | } |
1342 | ||
8e5f97e3 | 1343 | if (I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 1344 | pim_br_clear_pmbr(&up->sg); |
1345 | /* | |
1346 | * We need to do more here :) | |
1347 | * But this is the start. | |
1348 | */ | |
1349 | } | |
1350 | ||
1351 | /* source is no longer active - pull the SA from MSDP's cache */ | |
472ad383 | 1352 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 1353 | |
a53a9b3e AK |
1354 | /* JoinDesired can change when KAT is started or stopped */ |
1355 | pim_upstream_update_join_desired(pim, up); | |
1356 | ||
d62a17ae | 1357 | /* if entry was created because of activity we need to deref it */ |
1358 | if (PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
8e5f97e3 | 1359 | pim_upstream_fhr_kat_expiry(pim, up); |
23fc858a | 1360 | if (PIM_DEBUG_PIM_TRACE) |
996c9314 LB |
1361 | zlog_debug( |
1362 | "kat expired on %s[%s]; remove stream reference", | |
1363 | up->sg_str, pim->vrf->name); | |
d62a17ae | 1364 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(up->flags); |
e3e532dd | 1365 | |
1366 | /* Return if upstream entry got deleted.*/ | |
1367 | if (!pim_upstream_del(pim, up, __PRETTY_FUNCTION__)) | |
1368 | return NULL; | |
1369 | } | |
02434c43 DS |
1370 | if (PIM_UPSTREAM_FLAG_TEST_SRC_NOCACHE(up->flags)) { |
1371 | PIM_UPSTREAM_FLAG_UNSET_SRC_NOCACHE(up->flags); | |
1372 | ||
1373 | if (!pim_upstream_del(pim, up, __PRETTY_FUNCTION__)) | |
1374 | return NULL; | |
1375 | } | |
1376 | ||
e3e532dd | 1377 | /* upstream reference would have been added to track the local |
1378 | * membership if it is LHR. We have to clear it when KAT expires. | |
1379 | * Otherwise would result in stale entry with uncleared ref count. | |
1380 | */ | |
1381 | if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) { | |
8022df6a DS |
1382 | struct pim_upstream *parent = up->parent; |
1383 | ||
d62a17ae | 1384 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(up->flags); |
ff459c36 | 1385 | up = pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
8022df6a DS |
1386 | |
1387 | if (parent) { | |
996c9314 LB |
1388 | pim_jp_agg_single_upstream_send(&parent->rpf, parent, |
1389 | true); | |
8022df6a | 1390 | } |
d62a17ae | 1391 | } |
1392 | ||
ff459c36 AK |
1393 | return up; |
1394 | } | |
1395 | static int pim_upstream_keep_alive_timer(struct thread *t) | |
1396 | { | |
1397 | struct pim_upstream *up; | |
1398 | ||
1399 | up = THREAD_ARG(t); | |
1400 | ||
1401 | pim_upstream_keep_alive_timer_proc(up); | |
d62a17ae | 1402 | return 0; |
f14248dd DS |
1403 | } |
1404 | ||
d62a17ae | 1405 | void pim_upstream_keep_alive_timer_start(struct pim_upstream *up, uint32_t time) |
f14248dd | 1406 | { |
d62a17ae | 1407 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { |
23fc858a | 1408 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1409 | zlog_debug("kat start on %s with no stream reference", |
1410 | up->sg_str); | |
1411 | } | |
1412 | THREAD_OFF(up->t_ka_timer); | |
36417fcc DS |
1413 | thread_add_timer(router->master, pim_upstream_keep_alive_timer, up, |
1414 | time, &up->t_ka_timer); | |
d62a17ae | 1415 | |
1416 | /* any time keepalive is started against a SG we will have to | |
1417 | * re-evaluate our active source database */ | |
1418 | pim_msdp_sa_local_update(up); | |
a53a9b3e AK |
1419 | /* JoinDesired can change when KAT is started or stopped */ |
1420 | pim_upstream_update_join_desired(up->pim, up); | |
1bf16443 | 1421 | } |
1422 | ||
1423 | /* MSDP on RP needs to know if a source is registerable to this RP */ | |
d62a17ae | 1424 | static int pim_upstream_msdp_reg_timer(struct thread *t) |
1bf16443 | 1425 | { |
472ad383 DS |
1426 | struct pim_upstream *up = THREAD_ARG(t); |
1427 | struct pim_instance *pim = up->channel_oil->pim; | |
1bf16443 | 1428 | |
d62a17ae | 1429 | /* source is no longer active - pull the SA from MSDP's cache */ |
472ad383 | 1430 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 1431 | return 1; |
1bf16443 | 1432 | } |
d62a17ae | 1433 | void pim_upstream_msdp_reg_timer_start(struct pim_upstream *up) |
1bf16443 | 1434 | { |
d62a17ae | 1435 | THREAD_OFF(up->t_msdp_reg_timer); |
36417fcc | 1436 | thread_add_timer(router->master, pim_upstream_msdp_reg_timer, up, |
d62a17ae | 1437 | PIM_MSDP_REG_RXED_PERIOD, &up->t_msdp_reg_timer); |
1bf16443 | 1438 | |
d62a17ae | 1439 | pim_msdp_sa_local_update(up); |
f14248dd | 1440 | } |
cb40b272 DS |
1441 | |
1442 | /* | |
1443 | * 4.2.1 Last-Hop Switchover to the SPT | |
1444 | * | |
1445 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
1446 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
1447 | * router, it has the option of switching to receive the traffic on a | |
1448 | * shortest path tree (SPT). | |
1449 | * | |
1450 | * The decision for a router to switch to the SPT is controlled as | |
1451 | * follows: | |
1452 | * | |
1453 | * void | |
1454 | * CheckSwitchToSpt(S,G) { | |
1455 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
1456 | * (+) pim_include(S,G) != NULL ) | |
1457 | * AND SwitchToSptDesired(S,G) ) { | |
1458 | * # Note: Restarting the KAT will result in the SPT switch | |
1459 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1460 | * } | |
1461 | * } | |
1462 | * | |
1463 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
1464 | * defined. An "infinite threshold" policy can be implemented by making | |
1465 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
1466 | * first packet" policy can be implemented by making | |
1467 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
1468 | * received for the source and group. | |
1469 | */ | |
2ef4ed70 | 1470 | int pim_upstream_switch_to_spt_desired_on_rp(struct pim_instance *pim, |
8e5f97e3 | 1471 | struct prefix_sg *sg) |
cb40b272 | 1472 | { |
8e5f97e3 | 1473 | if (I_am_RP(pim, sg->grp)) |
d62a17ae | 1474 | return 1; |
a3b58b4a | 1475 | |
d62a17ae | 1476 | return 0; |
cb40b272 | 1477 | } |
d7259eac | 1478 | |
d62a17ae | 1479 | int pim_upstream_is_sg_rpt(struct pim_upstream *up) |
80d9c3a0 | 1480 | { |
d62a17ae | 1481 | struct listnode *chnode; |
1482 | struct pim_ifchannel *ch; | |
f21597f0 | 1483 | |
d62a17ae | 1484 | for (ALL_LIST_ELEMENTS_RO(up->ifchannels, chnode, ch)) { |
1485 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
1486 | return 1; | |
1487 | } | |
e43b8697 | 1488 | |
d62a17ae | 1489 | return 0; |
80d9c3a0 | 1490 | } |
3a66b17b DS |
1491 | /* |
1492 | * After receiving a packet set SPTbit: | |
1493 | * void | |
1494 | * Update_SPTbit(S,G,iif) { | |
1495 | * if ( iif == RPF_interface(S) | |
2951a7a4 QY |
1496 | * AND JoinDesired(S,G) == true |
1497 | * AND ( DirectlyConnected(S) == true | |
3a66b17b DS |
1498 | * OR RPF_interface(S) != RPF_interface(RP(G)) |
1499 | * OR inherited_olist(S,G,rpt) == NULL | |
1500 | * OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1501 | * ( RPF'(S,G) != NULL ) ) | |
1502 | * OR ( I_Am_Assert_Loser(S,G,iif) ) { | |
2951a7a4 | 1503 | * Set SPTbit(S,G) to true |
3a66b17b DS |
1504 | * } |
1505 | * } | |
1506 | */ | |
d62a17ae | 1507 | void pim_upstream_set_sptbit(struct pim_upstream *up, |
1508 | struct interface *incoming) | |
3a66b17b | 1509 | { |
d62a17ae | 1510 | struct pim_upstream *starup = up->parent; |
1511 | ||
1512 | // iif == RPF_interfvace(S) | |
1513 | if (up->rpf.source_nexthop.interface != incoming) { | |
23fc858a | 1514 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1515 | zlog_debug( |
1516 | "%s: Incoming Interface: %s is different than RPF_interface(S) %s", | |
1517 | __PRETTY_FUNCTION__, incoming->name, | |
1518 | up->rpf.source_nexthop.interface->name); | |
1519 | return; | |
1520 | } | |
1521 | ||
2951a7a4 | 1522 | // AND JoinDesired(S,G) == true |
6f0f014f | 1523 | if (!pim_upstream_evaluate_join_desired(up->channel_oil->pim, up)) { |
23fc858a | 1524 | if (PIM_DEBUG_PIM_TRACE) |
6f0f014f DS |
1525 | zlog_debug("%s: %s Join is not Desired", |
1526 | __PRETTY_FUNCTION__, up->sg_str); | |
1527 | return; | |
1528 | } | |
d62a17ae | 1529 | |
2951a7a4 | 1530 | // DirectlyConnected(S) == true |
d62a17ae | 1531 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, |
1532 | up->sg.src)) { | |
23fc858a | 1533 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1534 | zlog_debug("%s: %s is directly connected to the source", |
1535 | __PRETTY_FUNCTION__, up->sg_str); | |
1536 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1537 | return; | |
1538 | } | |
1539 | ||
1540 | // OR RPF_interface(S) != RPF_interface(RP(G)) | |
1541 | if (!starup | |
1542 | || up->rpf.source_nexthop | |
1543 | .interface != starup->rpf.source_nexthop.interface) { | |
2de05c60 DS |
1544 | struct pim_upstream *starup = up->parent; |
1545 | ||
23fc858a | 1546 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1547 | zlog_debug( |
1548 | "%s: %s RPF_interface(S) != RPF_interface(RP(G))", | |
1549 | __PRETTY_FUNCTION__, up->sg_str); | |
1550 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
2de05c60 DS |
1551 | |
1552 | pim_jp_agg_single_upstream_send(&starup->rpf, starup, true); | |
d62a17ae | 1553 | return; |
1554 | } | |
1555 | ||
1556 | // OR inherited_olist(S,G,rpt) == NULL | |
1557 | if (pim_upstream_is_sg_rpt(up) | |
1558 | && pim_upstream_empty_inherited_olist(up)) { | |
23fc858a | 1559 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1560 | zlog_debug("%s: %s OR inherited_olist(S,G,rpt) == NULL", |
1561 | __PRETTY_FUNCTION__, up->sg_str); | |
1562 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1563 | return; | |
1564 | } | |
1565 | ||
1566 | // OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1567 | // ( RPF'(S,G) != NULL ) ) | |
1568 | if (up->parent && pim_rpf_is_same(&up->rpf, &up->parent->rpf)) { | |
23fc858a | 1569 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1570 | zlog_debug("%s: %s RPF'(S,G) is the same as RPF'(*,G)", |
1571 | __PRETTY_FUNCTION__, up->sg_str); | |
1572 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1573 | return; | |
1574 | } | |
1575 | ||
1576 | return; | |
3a66b17b | 1577 | } |
80d9c3a0 | 1578 | |
d62a17ae | 1579 | const char *pim_upstream_state2str(enum pim_upstream_state join_state) |
d7259eac | 1580 | { |
d62a17ae | 1581 | switch (join_state) { |
1582 | case PIM_UPSTREAM_NOTJOINED: | |
1583 | return "NotJoined"; | |
1584 | break; | |
1585 | case PIM_UPSTREAM_JOINED: | |
1586 | return "Joined"; | |
1587 | break; | |
1588 | } | |
1589 | return "Unknown"; | |
d7259eac | 1590 | } |
627ed2a3 | 1591 | |
c35b7e6b QY |
1592 | const char *pim_reg_state2str(enum pim_reg_state reg_state, char *state_str, |
1593 | size_t state_str_len) | |
e0e127b0 | 1594 | { |
d62a17ae | 1595 | switch (reg_state) { |
1596 | case PIM_REG_NOINFO: | |
c35b7e6b | 1597 | strlcpy(state_str, "RegNoInfo", state_str_len); |
d62a17ae | 1598 | break; |
1599 | case PIM_REG_JOIN: | |
c35b7e6b | 1600 | strlcpy(state_str, "RegJoined", state_str_len); |
d62a17ae | 1601 | break; |
1602 | case PIM_REG_JOIN_PENDING: | |
c35b7e6b | 1603 | strlcpy(state_str, "RegJoinPend", state_str_len); |
d62a17ae | 1604 | break; |
1605 | case PIM_REG_PRUNE: | |
c35b7e6b | 1606 | strlcpy(state_str, "RegPrune", state_str_len); |
d62a17ae | 1607 | break; |
1608 | default: | |
c35b7e6b | 1609 | strlcpy(state_str, "RegUnknown", state_str_len); |
d62a17ae | 1610 | } |
1611 | return state_str; | |
e0e127b0 | 1612 | } |
1613 | ||
d62a17ae | 1614 | static int pim_upstream_register_stop_timer(struct thread *t) |
627ed2a3 | 1615 | { |
d62a17ae | 1616 | struct pim_interface *pim_ifp; |
8e5f97e3 | 1617 | struct pim_instance *pim; |
d62a17ae | 1618 | struct pim_upstream *up; |
d62a17ae | 1619 | up = THREAD_ARG(t); |
8e5f97e3 | 1620 | pim = up->channel_oil->pim; |
d62a17ae | 1621 | |
23fc858a | 1622 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 1623 | char state_str[PIM_REG_STATE_STR_LEN]; |
8dbdb215 DS |
1624 | zlog_debug("%s: (S,G)=%s[%s] upstream register stop timer %s", |
1625 | __PRETTY_FUNCTION__, up->sg_str, pim->vrf->name, | |
c35b7e6b | 1626 | pim_reg_state2str(up->reg_state, state_str, sizeof(state_str))); |
d62a17ae | 1627 | } |
1628 | ||
1629 | switch (up->reg_state) { | |
1630 | case PIM_REG_JOIN_PENDING: | |
1631 | up->reg_state = PIM_REG_JOIN; | |
8e5f97e3 | 1632 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
1b249e70 AK |
1633 | PIM_OIF_FLAG_PROTO_PIM, |
1634 | __func__); | |
2951a7a4 | 1635 | pim_vxlan_update_sg_reg_state(pim, up, true /*reg_join*/); |
d62a17ae | 1636 | break; |
1637 | case PIM_REG_JOIN: | |
1638 | break; | |
1639 | case PIM_REG_PRUNE: | |
957d93ea | 1640 | if (!up->rpf.source_nexthop.interface) { |
23fc858a | 1641 | if (PIM_DEBUG_PIM_TRACE) |
957d93ea SP |
1642 | zlog_debug("%s: up %s RPF is not present", |
1643 | __PRETTY_FUNCTION__, up->sg_str); | |
1644 | return 0; | |
1645 | } | |
1646 | ||
d62a17ae | 1647 | pim_ifp = up->rpf.source_nexthop.interface->info; |
1648 | if (!pim_ifp) { | |
23fc858a | 1649 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1650 | zlog_debug( |
1651 | "%s: Interface: %s is not configured for pim", | |
1652 | __PRETTY_FUNCTION__, | |
1653 | up->rpf.source_nexthop.interface->name); | |
1654 | return 0; | |
1655 | } | |
1656 | up->reg_state = PIM_REG_JOIN_PENDING; | |
1657 | pim_upstream_start_register_stop_timer(up, 1); | |
1658 | ||
1659 | if (((up->channel_oil->cc.lastused / 100) | |
2f5b0028 | 1660 | > pim->keep_alive_time) |
d9c9a9ee | 1661 | && (I_am_RP(pim_ifp->pim, up->sg.grp))) { |
23fc858a | 1662 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1663 | zlog_debug( |
1664 | "%s: Stop sending the register, because I am the RP and we haven't seen a packet in a while", | |
1665 | __PRETTY_FUNCTION__); | |
1666 | return 0; | |
1667 | } | |
aea1f845 | 1668 | pim_null_register_send(up); |
d62a17ae | 1669 | break; |
1670 | default: | |
1671 | break; | |
70e7fda8 | 1672 | } |
d62a17ae | 1673 | |
1674 | return 0; | |
627ed2a3 DS |
1675 | } |
1676 | ||
d62a17ae | 1677 | void pim_upstream_start_register_stop_timer(struct pim_upstream *up, |
1678 | int null_register) | |
627ed2a3 | 1679 | { |
d62a17ae | 1680 | uint32_t time; |
1681 | ||
1682 | THREAD_TIMER_OFF(up->t_rs_timer); | |
1683 | ||
1684 | if (!null_register) { | |
1685 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1686 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1687 | time = lower + (random() % (upper - lower + 1)) | |
1688 | - PIM_REGISTER_PROBE_PERIOD; | |
1689 | } else | |
1690 | time = PIM_REGISTER_PROBE_PERIOD; | |
1691 | ||
23fc858a | 1692 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 1693 | zlog_debug( |
1694 | "%s: (S,G)=%s Starting upstream register stop timer %d", | |
1695 | __PRETTY_FUNCTION__, up->sg_str, time); | |
1696 | } | |
36417fcc DS |
1697 | thread_add_timer(router->master, pim_upstream_register_stop_timer, up, |
1698 | time, &up->t_rs_timer); | |
627ed2a3 | 1699 | } |
4fdc8f36 | 1700 | |
9b29ea95 DS |
1701 | int pim_upstream_inherited_olist_decide(struct pim_instance *pim, |
1702 | struct pim_upstream *up) | |
4fdc8f36 | 1703 | { |
d62a17ae | 1704 | struct interface *ifp; |
d62a17ae | 1705 | struct pim_ifchannel *ch, *starch; |
d62a17ae | 1706 | struct pim_upstream *starup = up->parent; |
1707 | int output_intf = 0; | |
1708 | ||
46dd6edb | 1709 | if (!up->rpf.source_nexthop.interface) |
23fc858a | 1710 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1711 | zlog_debug("%s: up %s RPF is not present", |
1712 | __PRETTY_FUNCTION__, up->sg_str); | |
d62a17ae | 1713 | |
451fda4f | 1714 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
d62a17ae | 1715 | if (!ifp->info) |
1716 | continue; | |
1717 | ||
1718 | ch = pim_ifchannel_find(ifp, &up->sg); | |
1719 | ||
1720 | if (starup) | |
1721 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
1722 | else | |
1723 | starch = NULL; | |
1724 | ||
1725 | if (!ch && !starch) | |
1726 | continue; | |
1727 | ||
1728 | if (pim_upstream_evaluate_join_desired_interface(up, ch, | |
1729 | starch)) { | |
1730 | int flag = PIM_OIF_FLAG_PROTO_PIM; | |
1731 | ||
1732 | if (!ch) | |
1733 | flag = PIM_OIF_FLAG_PROTO_STAR; | |
1734 | ||
1b249e70 AK |
1735 | pim_channel_add_oif(up->channel_oil, ifp, flag, |
1736 | __func__); | |
d62a17ae | 1737 | output_intf++; |
1738 | } | |
1739 | } | |
1740 | ||
1741 | return output_intf; | |
b5183fd1 DS |
1742 | } |
1743 | ||
1744 | /* | |
1745 | * For a given upstream, determine the inherited_olist | |
1746 | * and apply it. | |
1747 | * | |
1748 | * inherited_olist(S,G,rpt) = | |
1749 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1750 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1751 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1752 | * | |
1753 | * inherited_olist(S,G) = | |
1754 | * inherited_olist(S,G,rpt) (+) | |
1755 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1756 | * | |
1757 | * return 1 if there are any output interfaces | |
1758 | * return 0 if there are not any output interfaces | |
1759 | */ | |
9b29ea95 DS |
1760 | int pim_upstream_inherited_olist(struct pim_instance *pim, |
1761 | struct pim_upstream *up) | |
b5183fd1 | 1762 | { |
9b29ea95 | 1763 | int output_intf = pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 1764 | |
1765 | /* | |
1766 | * If we have output_intf switch state to Join and work like normal | |
1767 | * If we don't have an output_intf that means we are probably a | |
1768 | * switch on a stick so turn on forwarding to just accept the | |
1769 | * incoming packets so we don't bother the other stuff! | |
1770 | */ | |
a53a9b3e AK |
1771 | pim_upstream_update_join_desired(pim, up); |
1772 | ||
1773 | if (!output_intf) | |
d62a17ae | 1774 | forward_on(up); |
1775 | ||
1776 | return output_intf; | |
4fdc8f36 | 1777 | } |
d3dd1804 | 1778 | |
d62a17ae | 1779 | int pim_upstream_empty_inherited_olist(struct pim_upstream *up) |
80d9c3a0 | 1780 | { |
d62a17ae | 1781 | return pim_channel_oil_empty(up->channel_oil); |
80d9c3a0 DS |
1782 | } |
1783 | ||
d3dd1804 DS |
1784 | /* |
1785 | * When we have a new neighbor, | |
1786 | * find upstreams that don't have their rpf_addr | |
1787 | * set and see if the new neighbor allows | |
1788 | * the join to be sent | |
1789 | */ | |
9b29ea95 | 1790 | void pim_upstream_find_new_rpf(struct pim_instance *pim) |
d3dd1804 | 1791 | { |
d62a17ae | 1792 | struct listnode *up_node; |
1793 | struct listnode *up_nextnode; | |
1794 | struct pim_upstream *up; | |
7ef66af9 AK |
1795 | struct pim_rpf old; |
1796 | enum pim_rpf_result rpf_result; | |
d62a17ae | 1797 | |
1798 | /* | |
1799 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
1800 | */ | |
9b29ea95 | 1801 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { |
957d93ea | 1802 | if (up->upstream_addr.s_addr == INADDR_ANY) { |
23fc858a | 1803 | if (PIM_DEBUG_PIM_TRACE) |
957d93ea SP |
1804 | zlog_debug( |
1805 | "%s: RP not configured for Upstream %s", | |
1806 | __PRETTY_FUNCTION__, up->sg_str); | |
1807 | continue; | |
1808 | } | |
1809 | ||
d62a17ae | 1810 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { |
23fc858a | 1811 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1812 | zlog_debug( |
957d93ea SP |
1813 | "%s: Upstream %s without a path to send join, checking", |
1814 | __PRETTY_FUNCTION__, up->sg_str); | |
075a475e AK |
1815 | old.source_nexthop.interface = |
1816 | up->rpf.source_nexthop.interface; | |
7ef66af9 | 1817 | rpf_result = pim_rpf_update(pim, up, &old, __func__); |
b36576e4 AK |
1818 | if (rpf_result == PIM_RPF_CHANGED || |
1819 | (rpf_result == PIM_RPF_FAILURE && | |
1820 | old.source_nexthop.interface)) | |
7ef66af9 AK |
1821 | pim_zebra_upstream_rpf_changed(pim, up, &old); |
1822 | /* update kernel multicast forwarding cache (MFC) */ | |
075a475e AK |
1823 | pim_upstream_mroute_iif_update(up->channel_oil, |
1824 | __func__); | |
d62a17ae | 1825 | } |
d3dd1804 | 1826 | } |
7ef66af9 | 1827 | pim_zebra_update_all_interfaces(pim); |
d3dd1804 | 1828 | } |
0f588989 | 1829 | |
d8b87afe | 1830 | unsigned int pim_upstream_hash_key(const void *arg) |
0f588989 | 1831 | { |
d8b87afe | 1832 | const struct pim_upstream *up = arg; |
0f588989 | 1833 | |
d62a17ae | 1834 | return jhash_2words(up->sg.src.s_addr, up->sg.grp.s_addr, 0); |
0f588989 DS |
1835 | } |
1836 | ||
9b29ea95 | 1837 | void pim_upstream_terminate(struct pim_instance *pim) |
0f588989 | 1838 | { |
172e45dc DS |
1839 | struct pim_upstream *up; |
1840 | ||
1841 | if (pim->upstream_list) { | |
1d483838 DS |
1842 | while (pim->upstream_list->count) { |
1843 | up = listnode_head(pim->upstream_list); | |
172e45dc | 1844 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
1d483838 | 1845 | } |
172e45dc | 1846 | |
6a154c88 | 1847 | list_delete(&pim->upstream_list); |
172e45dc | 1848 | } |
0f588989 | 1849 | |
9b29ea95 DS |
1850 | if (pim->upstream_hash) |
1851 | hash_free(pim->upstream_hash); | |
1852 | pim->upstream_hash = NULL; | |
0c68972d DS |
1853 | |
1854 | if (pim->upstream_sg_wheel) | |
1855 | wheel_delete(pim->upstream_sg_wheel); | |
1856 | pim->upstream_sg_wheel = NULL; | |
0f588989 DS |
1857 | } |
1858 | ||
74df8d6d | 1859 | bool pim_upstream_equal(const void *arg1, const void *arg2) |
0f588989 | 1860 | { |
d62a17ae | 1861 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
1862 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
0f588989 | 1863 | |
d62a17ae | 1864 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) |
1865 | && (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
74df8d6d | 1866 | return true; |
0f588989 | 1867 | |
74df8d6d | 1868 | return false; |
0f588989 DS |
1869 | } |
1870 | ||
1bf16443 | 1871 | /* rfc4601:section-4.2:"Data Packet Forwarding Rules" defines |
1872 | * the cases where kat has to be restarted on rxing traffic - | |
1873 | * | |
2951a7a4 | 1874 | * if( DirectlyConnected(S) == true AND iif == RPF_interface(S) ) { |
1bf16443 | 1875 | * set KeepaliveTimer(S,G) to Keepalive_Period |
1876 | * # Note: a register state transition or UpstreamJPState(S,G) | |
1877 | * # transition may happen as a result of restarting | |
1878 | * # KeepaliveTimer, and must be dealt with here. | |
1879 | * } | |
1880 | * if( iif == RPF_interface(S) AND UpstreamJPState(S,G) == Joined AND | |
1881 | * inherited_olist(S,G) != NULL ) { | |
1882 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1883 | * } | |
1884 | */ | |
1885 | static bool pim_upstream_kat_start_ok(struct pim_upstream *up) | |
1886 | { | |
cfa8f7eb AK |
1887 | struct channel_oil *c_oil = up->channel_oil; |
1888 | struct interface *ifp = up->rpf.source_nexthop.interface; | |
1889 | struct pim_interface *pim_ifp; | |
1890 | ||
1891 | /* "iif == RPF_interface(S)" check is not easy to do as the info | |
1892 | * we get from the kernel/ASIC is really a "lookup/key hit". | |
1893 | * So we will do an approximate check here to avoid starting KAT | |
1894 | * because of (S,G,rpt) forwarding on a non-LHR. | |
1895 | */ | |
1896 | if (!ifp) | |
1897 | return false; | |
1898 | ||
1899 | pim_ifp = ifp->info; | |
1900 | if (pim_ifp->mroute_vif_index != c_oil->oil.mfcc_parent) | |
1901 | return false; | |
8e5f97e3 | 1902 | |
a1be0939 | 1903 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, |
d62a17ae | 1904 | up->sg.src)) { |
1905 | return true; | |
1906 | } | |
1907 | ||
1908 | if ((up->join_state == PIM_UPSTREAM_JOINED) | |
cfa8f7eb AK |
1909 | && !pim_upstream_empty_inherited_olist(up)) { |
1910 | return true; | |
d62a17ae | 1911 | } |
1912 | ||
1913 | return false; | |
1bf16443 | 1914 | } |
1915 | ||
9c5e4d62 DS |
1916 | /* |
1917 | * Code to check and see if we've received packets on a S,G mroute | |
1918 | * and if so to set the SPT bit appropriately | |
1919 | */ | |
d62a17ae | 1920 | static void pim_upstream_sg_running(void *arg) |
9c5e4d62 | 1921 | { |
d62a17ae | 1922 | struct pim_upstream *up = (struct pim_upstream *)arg; |
8e5f97e3 | 1923 | struct pim_instance *pim = up->channel_oil->pim; |
d62a17ae | 1924 | |
1925 | // No packet can have arrived here if this is the case | |
8e5f97e3 | 1926 | if (!up->channel_oil->installed) { |
23fc858a | 1927 | if (PIM_DEBUG_PIM_TRACE) |
41714081 | 1928 | zlog_debug("%s: %s%s is not installed in mroute", |
996c9314 LB |
1929 | __PRETTY_FUNCTION__, up->sg_str, |
1930 | pim->vrf->name); | |
d62a17ae | 1931 | return; |
1932 | } | |
1933 | ||
1934 | /* | |
1935 | * This is a bit of a hack | |
1936 | * We've noted that we should rescan but | |
1937 | * we've missed the window for doing so in | |
1938 | * pim_zebra.c for some reason. I am | |
1939 | * only doing this at this point in time | |
1940 | * to get us up and working for the moment | |
1941 | */ | |
1942 | if (up->channel_oil->oil_inherited_rescan) { | |
23fc858a | 1943 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1944 | zlog_debug( |
8dbdb215 | 1945 | "%s: Handling unscanned inherited_olist for %s[%s]", |
996c9314 LB |
1946 | __PRETTY_FUNCTION__, up->sg_str, |
1947 | pim->vrf->name); | |
8e5f97e3 | 1948 | pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 1949 | up->channel_oil->oil_inherited_rescan = 0; |
1950 | } | |
1951 | pim_mroute_update_counters(up->channel_oil); | |
1952 | ||
1953 | // Have we seen packets? | |
1954 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) | |
1955 | && (up->channel_oil->cc.lastused / 100 > 30)) { | |
23fc858a | 1956 | if (PIM_DEBUG_PIM_TRACE) { |
d62a17ae | 1957 | zlog_debug( |
8dbdb215 DS |
1958 | "%s[%s]: %s old packet count is equal or lastused is greater than 30, (%ld,%ld,%lld)", |
1959 | __PRETTY_FUNCTION__, up->sg_str, pim->vrf->name, | |
d62a17ae | 1960 | up->channel_oil->cc.oldpktcnt, |
1961 | up->channel_oil->cc.pktcnt, | |
1962 | up->channel_oil->cc.lastused / 100); | |
1963 | } | |
1964 | return; | |
e43b8697 | 1965 | } |
d62a17ae | 1966 | |
1967 | if (pim_upstream_kat_start_ok(up)) { | |
1968 | /* Add a source reference to the stream if | |
1969 | * one doesn't already exist */ | |
1970 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
23fc858a | 1971 | if (PIM_DEBUG_PIM_TRACE) |
d62a17ae | 1972 | zlog_debug( |
8dbdb215 DS |
1973 | "source reference created on kat restart %s[%s]", |
1974 | up->sg_str, pim->vrf->name); | |
d62a17ae | 1975 | |
1976 | pim_upstream_ref(up, PIM_UPSTREAM_FLAG_MASK_SRC_STREAM, | |
1977 | __PRETTY_FUNCTION__); | |
1978 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); | |
1979 | pim_upstream_fhr_kat_start(up); | |
1980 | } | |
19b807ca | 1981 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); |
d62a17ae | 1982 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) |
19b807ca | 1983 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); |
d62a17ae | 1984 | |
957d93ea SP |
1985 | if ((up->sptbit != PIM_UPSTREAM_SPTBIT_TRUE) && |
1986 | (up->rpf.source_nexthop.interface)) { | |
d62a17ae | 1987 | pim_upstream_set_sptbit(up, up->rpf.source_nexthop.interface); |
850a9f99 | 1988 | } |
d62a17ae | 1989 | return; |
9c5e4d62 DS |
1990 | } |
1991 | ||
9b29ea95 | 1992 | void pim_upstream_add_lhr_star_pimreg(struct pim_instance *pim) |
a7b2b1e2 | 1993 | { |
d62a17ae | 1994 | struct pim_upstream *up; |
1995 | struct listnode *node; | |
a7b2b1e2 | 1996 | |
9b29ea95 | 1997 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { |
d62a17ae | 1998 | if (up->sg.src.s_addr != INADDR_ANY) |
1999 | continue; | |
a7b2b1e2 | 2000 | |
d62a17ae | 2001 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) |
2002 | continue; | |
a7b2b1e2 | 2003 | |
9b29ea95 | 2004 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
1b249e70 | 2005 | PIM_OIF_FLAG_PROTO_IGMP, __func__); |
d62a17ae | 2006 | } |
a7b2b1e2 DS |
2007 | } |
2008 | ||
9b29ea95 DS |
2009 | void pim_upstream_spt_prefix_list_update(struct pim_instance *pim, |
2010 | struct prefix_list *pl) | |
df94f9a9 | 2011 | { |
d62a17ae | 2012 | const char *pname = prefix_list_name(pl); |
df94f9a9 | 2013 | |
9b29ea95 DS |
2014 | if (pim->spt.plist && strcmp(pim->spt.plist, pname) == 0) { |
2015 | pim_upstream_remove_lhr_star_pimreg(pim, pname); | |
d62a17ae | 2016 | } |
df94f9a9 DS |
2017 | } |
2018 | ||
2019 | /* | |
2020 | * nlist -> The new prefix list | |
2021 | * | |
2022 | * Per Group Application of pimreg to the OIL | |
2023 | * If the prefix list tells us DENY then | |
2024 | * we need to Switchover to SPT immediate | |
2025 | * so add the pimreg. | |
2026 | * If the prefix list tells us to ACCEPT than | |
2027 | * we need to Never do the SPT so remove | |
2028 | * the interface | |
2029 | * | |
2030 | */ | |
9b29ea95 DS |
2031 | void pim_upstream_remove_lhr_star_pimreg(struct pim_instance *pim, |
2032 | const char *nlist) | |
a7b2b1e2 | 2033 | { |
d62a17ae | 2034 | struct pim_upstream *up; |
2035 | struct listnode *node; | |
2036 | struct prefix_list *np; | |
2037 | struct prefix g; | |
2038 | enum prefix_list_type apply_new; | |
2039 | ||
2040 | np = prefix_list_lookup(AFI_IP, nlist); | |
2041 | ||
2042 | g.family = AF_INET; | |
2043 | g.prefixlen = IPV4_MAX_PREFIXLEN; | |
2044 | ||
9b29ea95 | 2045 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { |
d62a17ae | 2046 | if (up->sg.src.s_addr != INADDR_ANY) |
2047 | continue; | |
2048 | ||
2049 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) | |
2050 | continue; | |
2051 | ||
2052 | if (!nlist) { | |
9b29ea95 | 2053 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
1b249e70 | 2054 | PIM_OIF_FLAG_PROTO_IGMP, __func__); |
d62a17ae | 2055 | continue; |
2056 | } | |
2057 | g.u.prefix4 = up->sg.grp; | |
2058 | apply_new = prefix_list_apply(np, &g); | |
2059 | if (apply_new == PREFIX_DENY) | |
9b29ea95 | 2060 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
1b249e70 AK |
2061 | PIM_OIF_FLAG_PROTO_IGMP, |
2062 | __func__); | |
d62a17ae | 2063 | else |
9b29ea95 | 2064 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
1b249e70 | 2065 | PIM_OIF_FLAG_PROTO_IGMP, __func__); |
d62a17ae | 2066 | } |
a7b2b1e2 DS |
2067 | } |
2068 | ||
9b29ea95 | 2069 | void pim_upstream_init(struct pim_instance *pim) |
0f588989 | 2070 | { |
c2cfa843 | 2071 | char name[64]; |
9fb302f4 | 2072 | |
c2cfa843 DS |
2073 | snprintf(name, 64, "PIM %s Timer Wheel", |
2074 | pim->vrf->name); | |
9b29ea95 | 2075 | pim->upstream_sg_wheel = |
36417fcc | 2076 | wheel_init(router->master, 31000, 100, pim_upstream_hash_key, |
c2cfa843 | 2077 | pim_upstream_sg_running, name); |
9fb302f4 | 2078 | |
c2cfa843 DS |
2079 | snprintf(name, 64, "PIM %s Upstream Hash", |
2080 | pim->vrf->name); | |
9b29ea95 | 2081 | pim->upstream_hash = hash_create_size(8192, pim_upstream_hash_key, |
c2cfa843 | 2082 | pim_upstream_equal, name); |
d62a17ae | 2083 | |
9b29ea95 | 2084 | pim->upstream_list = list_new(); |
9b29ea95 | 2085 | pim->upstream_list->cmp = pim_upstream_compare; |
0f588989 | 2086 | } |