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Commit | Line | Data |
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12e41d03 | 1 | /* |
896014f4 DL |
2 | * PIM for Quagga |
3 | * Copyright (C) 2008 Everton da Silva Marques | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; see the file COPYING; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
12e41d03 DL |
19 | |
20 | #include <zebra.h> | |
21 | ||
22 | #include "zebra/rib.h" | |
23 | ||
24 | #include "log.h" | |
25 | #include "zclient.h" | |
26 | #include "memory.h" | |
27 | #include "thread.h" | |
28 | #include "linklist.h" | |
dfe43e25 DW |
29 | #include "vty.h" |
30 | #include "plist.h" | |
0f588989 DS |
31 | #include "hash.h" |
32 | #include "jhash.h" | |
9c5e4d62 | 33 | #include "wheel.h" |
12e41d03 DL |
34 | |
35 | #include "pimd.h" | |
36 | #include "pim_pim.h" | |
37 | #include "pim_str.h" | |
38 | #include "pim_time.h" | |
39 | #include "pim_iface.h" | |
40 | #include "pim_join.h" | |
41 | #include "pim_zlookup.h" | |
42 | #include "pim_upstream.h" | |
43 | #include "pim_ifchannel.h" | |
44 | #include "pim_neighbor.h" | |
45 | #include "pim_rpf.h" | |
46 | #include "pim_zebra.h" | |
47 | #include "pim_oil.h" | |
48 | #include "pim_macro.h" | |
8f5f5e91 | 49 | #include "pim_rp.h" |
f14248dd | 50 | #include "pim_br.h" |
627ed2a3 | 51 | #include "pim_register.h" |
3c72d654 | 52 | #include "pim_msdp.h" |
982bff89 | 53 | #include "pim_jp_agg.h" |
1bc98276 | 54 | #include "pim_nht.h" |
15a5dafe | 55 | #include "pim_ssm.h" |
12e41d03 | 56 | |
982bff89 | 57 | static void join_timer_stop(struct pim_upstream *up); |
d62a17ae | 58 | static void |
59 | pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); | |
12e41d03 | 60 | |
cfa91a87 DS |
61 | /* |
62 | * A (*,G) or a (*,*) is going away | |
63 | * remove the parent pointer from | |
64 | * those pointing at us | |
65 | */ | |
9b29ea95 DS |
66 | static void pim_upstream_remove_children(struct pim_instance *pim, |
67 | struct pim_upstream *up) | |
cfa91a87 | 68 | { |
d62a17ae | 69 | struct pim_upstream *child; |
70 | ||
71 | if (!up->sources) | |
72 | return; | |
73 | ||
74 | while (!list_isempty(up->sources)) { | |
75 | child = listnode_head(up->sources); | |
76 | listnode_delete(up->sources, child); | |
77 | if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(child->flags)) { | |
78 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(child->flags); | |
9b29ea95 DS |
79 | child = pim_upstream_del(pim, child, |
80 | __PRETTY_FUNCTION__); | |
d62a17ae | 81 | } |
82 | if (child) | |
83 | child->parent = NULL; | |
84 | } | |
85 | list_delete(up->sources); | |
86 | up->sources = NULL; | |
cfa91a87 DS |
87 | } |
88 | ||
89 | /* | |
90 | * A (*,G) or a (*,*) is being created | |
91 | * Find the children that would point | |
92 | * at us. | |
93 | */ | |
9b29ea95 DS |
94 | static void pim_upstream_find_new_children(struct pim_instance *pim, |
95 | struct pim_upstream *up) | |
cfa91a87 | 96 | { |
d62a17ae | 97 | struct pim_upstream *child; |
98 | struct listnode *ch_node; | |
99 | ||
100 | if ((up->sg.src.s_addr != INADDR_ANY) | |
101 | && (up->sg.grp.s_addr != INADDR_ANY)) | |
102 | return; | |
103 | ||
104 | if ((up->sg.src.s_addr == INADDR_ANY) | |
105 | && (up->sg.grp.s_addr == INADDR_ANY)) | |
106 | return; | |
107 | ||
9b29ea95 | 108 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, ch_node, child)) { |
d62a17ae | 109 | if ((up->sg.grp.s_addr != INADDR_ANY) |
110 | && (child->sg.grp.s_addr == up->sg.grp.s_addr) | |
111 | && (child != up)) { | |
112 | child->parent = up; | |
113 | listnode_add_sort(up->sources, child); | |
114 | } | |
03417ccd | 115 | } |
cfa91a87 DS |
116 | } |
117 | ||
4d99418b DS |
118 | /* |
119 | * If we have a (*,*) || (S,*) there is no parent | |
120 | * If we have a (S,G), find the (*,G) | |
121 | * If we have a (*,G), find the (*,*) | |
122 | */ | |
9b29ea95 DS |
123 | static struct pim_upstream *pim_upstream_find_parent(struct pim_instance *pim, |
124 | struct pim_upstream *child) | |
4d99418b | 125 | { |
d62a17ae | 126 | struct prefix_sg any = child->sg; |
127 | struct pim_upstream *up = NULL; | |
4d99418b | 128 | |
d62a17ae | 129 | // (S,G) |
130 | if ((child->sg.src.s_addr != INADDR_ANY) | |
131 | && (child->sg.grp.s_addr != INADDR_ANY)) { | |
132 | any.src.s_addr = INADDR_ANY; | |
9b29ea95 | 133 | up = pim_upstream_find(pim, &any); |
03417ccd | 134 | |
d62a17ae | 135 | if (up) |
136 | listnode_add(up->sources, child); | |
03417ccd | 137 | |
d62a17ae | 138 | return up; |
139 | } | |
4d99418b | 140 | |
d62a17ae | 141 | return NULL; |
4d99418b DS |
142 | } |
143 | ||
12e41d03 DL |
144 | void pim_upstream_free(struct pim_upstream *up) |
145 | { | |
d62a17ae | 146 | XFREE(MTYPE_PIM_UPSTREAM, up); |
147 | up = NULL; | |
12e41d03 DL |
148 | } |
149 | ||
150 | static void upstream_channel_oil_detach(struct pim_upstream *up) | |
151 | { | |
d62a17ae | 152 | if (up->channel_oil) { |
153 | /* Detaching from channel_oil, channel_oil may exist post del, | |
154 | but upstream would not keep reference of it | |
155 | */ | |
13221cf2 | 156 | up->channel_oil->up = NULL; |
d62a17ae | 157 | pim_channel_oil_del(up->channel_oil); |
158 | up->channel_oil = NULL; | |
159 | } | |
12e41d03 DL |
160 | } |
161 | ||
9b29ea95 DS |
162 | struct pim_upstream *pim_upstream_del(struct pim_instance *pim, |
163 | struct pim_upstream *up, const char *name) | |
12e41d03 | 164 | { |
d62a17ae | 165 | bool notify_msdp = false; |
166 | struct prefix nht_p; | |
167 | ||
168 | if (PIM_DEBUG_TRACE) | |
169 | zlog_debug( | |
8dbdb215 DS |
170 | "%s(%s): Delete %s[%s] ref count: %d , flags: %d c_oil ref count %d (Pre decrement)", |
171 | __PRETTY_FUNCTION__, name, up->sg_str, | |
172 | pim->vrf->name, up->ref_count, | |
d62a17ae | 173 | up->flags, up->channel_oil->oil_ref_count); |
174 | ||
175 | --up->ref_count; | |
176 | ||
177 | if (up->ref_count >= 1) | |
178 | return up; | |
179 | ||
180 | THREAD_OFF(up->t_ka_timer); | |
181 | THREAD_OFF(up->t_rs_timer); | |
182 | THREAD_OFF(up->t_msdp_reg_timer); | |
183 | ||
184 | if (up->join_state == PIM_UPSTREAM_JOINED) { | |
185 | pim_jp_agg_single_upstream_send(&up->rpf, up, 0); | |
186 | ||
187 | if (up->sg.src.s_addr == INADDR_ANY) { | |
188 | /* if a (*, G) entry in the joined state is being | |
189 | * deleted we | |
190 | * need to notify MSDP */ | |
191 | notify_msdp = true; | |
192 | } | |
193 | } | |
194 | ||
195 | join_timer_stop(up); | |
196 | pim_jp_agg_upstream_verification(up, false); | |
197 | up->rpf.source_nexthop.interface = NULL; | |
198 | ||
199 | if (up->sg.src.s_addr != INADDR_ANY) { | |
9b29ea95 | 200 | wheel_remove_item(pim->upstream_sg_wheel, up); |
d62a17ae | 201 | notify_msdp = true; |
202 | } | |
203 | ||
9b29ea95 | 204 | pim_upstream_remove_children(pim, up); |
d62a17ae | 205 | if (up->sources) |
206 | list_delete(up->sources); | |
207 | up->sources = NULL; | |
208 | pim_mroute_del(up->channel_oil, __PRETTY_FUNCTION__); | |
209 | upstream_channel_oil_detach(up); | |
210 | ||
211 | list_delete(up->ifchannels); | |
212 | up->ifchannels = NULL; | |
213 | ||
214 | /* | |
215 | notice that listnode_delete() can't be moved | |
216 | into pim_upstream_free() because the later is | |
217 | called by list_delete_all_node() | |
218 | */ | |
219 | if (up->parent && up->parent->sources) | |
220 | listnode_delete(up->parent->sources, up); | |
221 | up->parent = NULL; | |
222 | ||
9b29ea95 DS |
223 | listnode_delete(pim->upstream_list, up); |
224 | hash_release(pim->upstream_hash, up); | |
d62a17ae | 225 | |
226 | if (notify_msdp) { | |
472ad383 | 227 | pim_msdp_up_del(pim, &up->sg); |
d62a17ae | 228 | } |
229 | ||
230 | /* Deregister addr with Zebra NHT */ | |
231 | nht_p.family = AF_INET; | |
232 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
233 | nht_p.u.prefix4 = up->upstream_addr; | |
234 | if (PIM_DEBUG_TRACE) { | |
235 | char buf[PREFIX2STR_BUFFER]; | |
236 | prefix2str(&nht_p, buf, sizeof(buf)); | |
237 | zlog_debug("%s: Deregister upstream %s addr %s with Zebra NHT", | |
238 | __PRETTY_FUNCTION__, up->sg_str, buf); | |
239 | } | |
9b29ea95 | 240 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL); |
d62a17ae | 241 | |
242 | pim_upstream_free(up); | |
243 | ||
244 | return NULL; | |
12e41d03 DL |
245 | } |
246 | ||
d62a17ae | 247 | void pim_upstream_send_join(struct pim_upstream *up) |
12e41d03 | 248 | { |
d62a17ae | 249 | if (PIM_DEBUG_TRACE) { |
250 | char rpf_str[PREFIX_STRLEN]; | |
251 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, | |
252 | sizeof(rpf_str)); | |
253 | zlog_debug("%s: RPF'%s=%s(%s) for Interface %s", | |
254 | __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
255 | pim_upstream_state2str(up->join_state), | |
256 | up->rpf.source_nexthop.interface->name); | |
257 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
258 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", | |
259 | __PRETTY_FUNCTION__, up->sg_str, rpf_str); | |
260 | /* warning only */ | |
261 | } | |
262 | } | |
263 | ||
264 | /* send Join(S,G) to the current upstream neighbor */ | |
265 | pim_jp_agg_single_upstream_send(&up->rpf, up, 1 /* join */); | |
12e41d03 DL |
266 | } |
267 | ||
268 | static int on_join_timer(struct thread *t) | |
269 | { | |
d62a17ae | 270 | struct pim_upstream *up; |
12e41d03 | 271 | |
d62a17ae | 272 | up = THREAD_ARG(t); |
12e41d03 | 273 | |
d62a17ae | 274 | /* |
275 | * In the case of a HFR we will not ahve anyone to send this to. | |
276 | */ | |
277 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) | |
278 | return 0; | |
bb6e291f | 279 | |
d62a17ae | 280 | /* |
281 | * Don't send the join if the outgoing interface is a loopback | |
282 | * But since this might change leave the join timer running | |
283 | */ | |
284 | if (up->rpf.source_nexthop | |
285 | .interface && !if_is_loopback(up->rpf.source_nexthop.interface)) | |
286 | pim_upstream_send_join(up); | |
12e41d03 | 287 | |
d62a17ae | 288 | join_timer_start(up); |
12e41d03 | 289 | |
d62a17ae | 290 | return 0; |
12e41d03 DL |
291 | } |
292 | ||
982bff89 | 293 | static void join_timer_stop(struct pim_upstream *up) |
12e41d03 | 294 | { |
d62a17ae | 295 | struct pim_neighbor *nbr; |
982bff89 | 296 | |
d62a17ae | 297 | THREAD_OFF(up->t_join_timer); |
7eb90689 | 298 | |
d62a17ae | 299 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, |
300 | up->rpf.rpf_addr.u.prefix4); | |
982bff89 | 301 | |
d62a17ae | 302 | if (nbr) |
303 | pim_jp_agg_remove_group(nbr->upstream_jp_agg, up); | |
982bff89 | 304 | |
d62a17ae | 305 | pim_jp_agg_upstream_verification(up, false); |
982bff89 DS |
306 | } |
307 | ||
d62a17ae | 308 | void join_timer_start(struct pim_upstream *up) |
982bff89 | 309 | { |
d62a17ae | 310 | struct pim_neighbor *nbr = NULL; |
311 | ||
312 | if (up->rpf.source_nexthop.interface) { | |
313 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, | |
314 | up->rpf.rpf_addr.u.prefix4); | |
315 | ||
316 | if (PIM_DEBUG_PIM_EVENTS) { | |
317 | zlog_debug( | |
318 | "%s: starting %d sec timer for upstream (S,G)=%s", | |
319 | __PRETTY_FUNCTION__, qpim_t_periodic, | |
320 | up->sg_str); | |
321 | } | |
322 | } | |
323 | ||
324 | if (nbr) | |
325 | pim_jp_agg_add_group(nbr->upstream_jp_agg, up, 1); | |
326 | else { | |
327 | THREAD_OFF(up->t_join_timer); | |
328 | thread_add_timer(master, on_join_timer, up, qpim_t_periodic, | |
329 | &up->t_join_timer); | |
330 | } | |
331 | pim_jp_agg_upstream_verification(up, true); | |
12e41d03 DL |
332 | } |
333 | ||
982bff89 DS |
334 | /* |
335 | * This is only called when we are switching the upstream | |
336 | * J/P from one neighbor to another | |
337 | * | |
338 | * As such we need to remove from the old list and | |
339 | * add to the new list. | |
340 | */ | |
d62a17ae | 341 | void pim_upstream_join_timer_restart(struct pim_upstream *up, |
342 | struct pim_rpf *old) | |
12e41d03 | 343 | { |
d62a17ae | 344 | // THREAD_OFF(up->t_join_timer); |
345 | join_timer_start(up); | |
12e41d03 DL |
346 | } |
347 | ||
348 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
349 | int interval_msec) | |
350 | { | |
d62a17ae | 351 | if (PIM_DEBUG_PIM_EVENTS) { |
352 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", | |
353 | __PRETTY_FUNCTION__, interval_msec, up->sg_str); | |
354 | } | |
355 | ||
356 | THREAD_OFF(up->t_join_timer); | |
357 | thread_add_timer_msec(master, on_join_timer, up, interval_msec, | |
358 | &up->t_join_timer); | |
12e41d03 DL |
359 | } |
360 | ||
361 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
d62a17ae | 362 | struct in_addr rpf_addr, int holdtime) |
12e41d03 | 363 | { |
d62a17ae | 364 | long t_joinsuppress_msec; |
365 | long join_timer_remain_msec; | |
366 | ||
367 | t_joinsuppress_msec = | |
368 | MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
369 | 1000 * holdtime); | |
370 | ||
371 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
372 | ||
373 | if (PIM_DEBUG_TRACE) { | |
374 | char rpf_str[INET_ADDRSTRLEN]; | |
375 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); | |
376 | zlog_debug( | |
377 | "%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", | |
378 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
379 | join_timer_remain_msec, t_joinsuppress_msec); | |
380 | } | |
381 | ||
382 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
383 | if (PIM_DEBUG_TRACE) { | |
384 | zlog_debug( | |
385 | "%s %s: suppressing Join(S,G)=%s for %ld msec", | |
386 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, | |
387 | t_joinsuppress_msec); | |
388 | } | |
389 | ||
390 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
391 | } | |
12e41d03 DL |
392 | } |
393 | ||
394 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
d62a17ae | 395 | struct pim_upstream *up) |
12e41d03 | 396 | { |
d62a17ae | 397 | long join_timer_remain_msec; |
398 | int t_override_msec; | |
399 | ||
400 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
401 | t_override_msec = | |
402 | pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
403 | ||
404 | if (PIM_DEBUG_TRACE) { | |
405 | char rpf_str[INET_ADDRSTRLEN]; | |
406 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr.u.prefix4, rpf_str, | |
407 | sizeof(rpf_str)); | |
408 | zlog_debug( | |
409 | "%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", | |
410 | debug_label, up->sg_str, rpf_str, | |
411 | join_timer_remain_msec, t_override_msec); | |
412 | } | |
413 | ||
414 | if (join_timer_remain_msec > t_override_msec) { | |
415 | if (PIM_DEBUG_TRACE) { | |
416 | zlog_debug( | |
417 | "%s: decreasing (S,G)=%s join timer to t_override=%d msec", | |
418 | debug_label, up->sg_str, t_override_msec); | |
419 | } | |
420 | ||
421 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
422 | } | |
12e41d03 DL |
423 | } |
424 | ||
425 | static void forward_on(struct pim_upstream *up) | |
426 | { | |
d62a17ae | 427 | struct listnode *chnode; |
428 | struct listnode *chnextnode; | |
429 | struct pim_ifchannel *ch = NULL; | |
12e41d03 | 430 | |
d62a17ae | 431 | /* scan (S,G) state */ |
432 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
433 | if (pim_macro_chisin_oiflist(ch)) | |
434 | pim_forward_start(ch); | |
12e41d03 | 435 | |
d62a17ae | 436 | } /* scan iface channel list */ |
12e41d03 DL |
437 | } |
438 | ||
439 | static void forward_off(struct pim_upstream *up) | |
440 | { | |
d62a17ae | 441 | struct listnode *chnode; |
442 | struct listnode *chnextnode; | |
443 | struct pim_ifchannel *ch; | |
12e41d03 | 444 | |
d62a17ae | 445 | /* scan per-interface (S,G) state */ |
446 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
12e41d03 | 447 | |
aabb9a2f | 448 | pim_forward_stop(ch, false); |
12e41d03 | 449 | |
d62a17ae | 450 | } /* scan iface channel list */ |
12e41d03 DL |
451 | } |
452 | ||
d62a17ae | 453 | static int pim_upstream_could_register(struct pim_upstream *up) |
bb6e291f | 454 | { |
d62a17ae | 455 | struct pim_interface *pim_ifp = NULL; |
456 | ||
457 | if (up->rpf.source_nexthop.interface) | |
458 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
459 | else { | |
460 | if (PIM_DEBUG_TRACE) | |
461 | zlog_debug("%s: up %s RPF is not present", | |
462 | __PRETTY_FUNCTION__, up->sg_str); | |
463 | } | |
bb6e291f | 464 | |
d62a17ae | 465 | if (pim_ifp && PIM_I_am_DR(pim_ifp) |
466 | && pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
467 | up->sg.src)) | |
468 | return 1; | |
bb6e291f | 469 | |
d62a17ae | 470 | return 0; |
bb6e291f DS |
471 | } |
472 | ||
15a5dafe | 473 | /* Source registration is supressed for SSM groups. When the SSM range changes |
474 | * we re-revaluate register setup for existing upstream entries */ | |
9b29ea95 | 475 | void pim_upstream_register_reevaluate(struct pim_instance *pim) |
15a5dafe | 476 | { |
d62a17ae | 477 | struct listnode *upnode; |
478 | struct pim_upstream *up; | |
479 | ||
9b29ea95 | 480 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
d62a17ae | 481 | /* If FHR is set CouldRegister is True. Also check if the flow |
482 | * is actually active; if it is not kat setup will trigger | |
483 | * source | |
484 | * registration whenever the flow becomes active. */ | |
485 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags) || !up->t_ka_timer) | |
486 | continue; | |
487 | ||
6f439a70 | 488 | if (pim_is_grp_ssm(pim, up->sg.grp)) { |
d62a17ae | 489 | /* clear the register state for SSM groups */ |
490 | if (up->reg_state != PIM_REG_NOINFO) { | |
491 | if (PIM_DEBUG_PIM_EVENTS) | |
492 | zlog_debug( | |
493 | "Clear register for %s as G is now SSM", | |
494 | up->sg_str); | |
495 | /* remove regiface from the OIL if it is there*/ | |
496 | pim_channel_del_oif(up->channel_oil, | |
9b29ea95 | 497 | pim->regiface, |
d62a17ae | 498 | PIM_OIF_FLAG_PROTO_PIM); |
499 | up->reg_state = PIM_REG_NOINFO; | |
500 | } | |
501 | } else { | |
502 | /* register ASM sources with the RP */ | |
503 | if (up->reg_state == PIM_REG_NOINFO) { | |
504 | if (PIM_DEBUG_PIM_EVENTS) | |
505 | zlog_debug( | |
506 | "Register %s as G is now ASM", | |
507 | up->sg_str); | |
508 | pim_channel_add_oif(up->channel_oil, | |
9b29ea95 | 509 | pim->regiface, |
d62a17ae | 510 | PIM_OIF_FLAG_PROTO_PIM); |
511 | up->reg_state = PIM_REG_JOIN; | |
512 | } | |
513 | } | |
514 | } | |
15a5dafe | 515 | } |
516 | ||
1eca8576 | 517 | void pim_upstream_switch(struct pim_instance *pim, struct pim_upstream *up, |
d62a17ae | 518 | enum pim_upstream_state new_state) |
12e41d03 | 519 | { |
d62a17ae | 520 | enum pim_upstream_state old_state = up->join_state; |
521 | ||
522 | if (PIM_DEBUG_PIM_EVENTS) { | |
523 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", | |
524 | __PRETTY_FUNCTION__, up->sg_str, | |
525 | pim_upstream_state2str(up->join_state), | |
526 | pim_upstream_state2str(new_state)); | |
527 | } | |
528 | ||
529 | up->join_state = new_state; | |
530 | if (old_state != new_state) | |
531 | up->state_transition = pim_time_monotonic_sec(); | |
532 | ||
533 | pim_upstream_update_assert_tracking_desired(up); | |
534 | ||
535 | if (new_state == PIM_UPSTREAM_JOINED) { | |
536 | if (old_state != PIM_UPSTREAM_JOINED) { | |
537 | int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags); | |
538 | forward_on(up); | |
1eca8576 | 539 | pim_msdp_up_join_state_changed(pim, up); |
d62a17ae | 540 | if (pim_upstream_could_register(up)) { |
541 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
542 | if (!old_fhr | |
543 | && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM( | |
544 | up->flags)) { | |
545 | pim_upstream_keep_alive_timer_start( | |
19b807ca | 546 | up, pim->keep_alive_time); |
d62a17ae | 547 | pim_register_join(up); |
548 | } | |
549 | } else { | |
550 | pim_upstream_send_join(up); | |
551 | join_timer_start(up); | |
552 | } | |
553 | } else { | |
554 | forward_on(up); | |
555 | } | |
556 | } else { | |
557 | ||
558 | forward_off(up); | |
559 | if (old_state == PIM_UPSTREAM_JOINED) | |
1eca8576 | 560 | pim_msdp_up_join_state_changed(pim, up); |
d62a17ae | 561 | |
562 | /* IHR, Trigger SGRpt on *,G IIF to prune S,G from RPT towards | |
563 | RP. | |
564 | If I am RP for G then send S,G prune to its IIF. */ | |
565 | if (pim_upstream_is_sg_rpt(up) && up->parent | |
1eca8576 | 566 | && !I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 567 | if (PIM_DEBUG_PIM_TRACE_DETAIL) |
568 | zlog_debug( | |
569 | "%s: *,G IIF %s S,G IIF %s ", | |
570 | __PRETTY_FUNCTION__, | |
571 | up->parent->rpf.source_nexthop | |
572 | .interface->name, | |
573 | up->rpf.source_nexthop.interface->name); | |
574 | pim_jp_agg_single_upstream_send(&up->parent->rpf, | |
575 | up->parent, | |
576 | 1 /* (W,G) Join */); | |
577 | } else | |
578 | pim_jp_agg_single_upstream_send(&up->rpf, up, | |
579 | 0 /* prune */); | |
580 | join_timer_stop(up); | |
581 | } | |
12e41d03 DL |
582 | } |
583 | ||
d62a17ae | 584 | int pim_upstream_compare(void *arg1, void *arg2) |
03417ccd | 585 | { |
d62a17ae | 586 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
587 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
03417ccd | 588 | |
d62a17ae | 589 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) |
590 | return -1; | |
03417ccd | 591 | |
d62a17ae | 592 | if (ntohl(up1->sg.grp.s_addr) > ntohl(up2->sg.grp.s_addr)) |
593 | return 1; | |
03417ccd | 594 | |
d62a17ae | 595 | if (ntohl(up1->sg.src.s_addr) < ntohl(up2->sg.src.s_addr)) |
596 | return -1; | |
03417ccd | 597 | |
d62a17ae | 598 | if (ntohl(up1->sg.src.s_addr) > ntohl(up2->sg.src.s_addr)) |
599 | return 1; | |
03417ccd | 600 | |
d62a17ae | 601 | return 0; |
03417ccd DS |
602 | } |
603 | ||
2002dcdb DS |
604 | static struct pim_upstream *pim_upstream_new(struct pim_instance *pim, |
605 | struct prefix_sg *sg, | |
606 | struct interface *incoming, | |
0885a9f1 DS |
607 | int flags, |
608 | struct pim_ifchannel *ch) | |
12e41d03 | 609 | { |
d62a17ae | 610 | enum pim_rpf_result rpf_result; |
611 | struct pim_interface *pim_ifp; | |
612 | struct pim_upstream *up; | |
613 | ||
614 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); | |
615 | if (!up) { | |
616 | zlog_err("%s: PIM XCALLOC(%zu) failure", __PRETTY_FUNCTION__, | |
617 | sizeof(*up)); | |
618 | return NULL; | |
619 | } | |
620 | ||
621 | up->sg = *sg; | |
622 | pim_str_sg_set(sg, up->sg_str); | |
0885a9f1 DS |
623 | if (ch) |
624 | ch->upstream = up; | |
625 | ||
9b29ea95 | 626 | up = hash_get(pim->upstream_hash, up, hash_alloc_intern); |
d9c9a9ee DS |
627 | if (!pim_rp_set_upstream_addr(pim, &up->upstream_addr, sg->src, |
628 | sg->grp)) { | |
d62a17ae | 629 | if (PIM_DEBUG_TRACE) |
630 | zlog_debug("%s: Received a (*,G) with no RP configured", | |
631 | __PRETTY_FUNCTION__); | |
632 | ||
9b29ea95 | 633 | hash_release(pim->upstream_hash, up); |
d62a17ae | 634 | XFREE(MTYPE_PIM_UPSTREAM, up); |
635 | return NULL; | |
636 | } | |
637 | ||
9b29ea95 | 638 | up->parent = pim_upstream_find_parent(pim, up); |
d62a17ae | 639 | if (up->sg.src.s_addr == INADDR_ANY) { |
640 | up->sources = list_new(); | |
641 | up->sources->cmp = pim_upstream_compare; | |
642 | } else | |
643 | up->sources = NULL; | |
644 | ||
9b29ea95 | 645 | pim_upstream_find_new_children(pim, up); |
d62a17ae | 646 | up->flags = flags; |
647 | up->ref_count = 1; | |
648 | up->t_join_timer = NULL; | |
649 | up->t_ka_timer = NULL; | |
650 | up->t_rs_timer = NULL; | |
651 | up->t_msdp_reg_timer = NULL; | |
652 | up->join_state = PIM_UPSTREAM_NOTJOINED; | |
653 | up->reg_state = PIM_REG_NOINFO; | |
654 | up->state_transition = pim_time_monotonic_sec(); | |
655 | up->channel_oil = NULL; | |
656 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; | |
657 | ||
658 | up->rpf.source_nexthop.interface = NULL; | |
659 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; | |
660 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = | |
661 | PIM_NET_INADDR_ANY; | |
662 | up->rpf.source_nexthop.mrib_metric_preference = | |
663 | qpim_infinite_assert_metric.metric_preference; | |
664 | up->rpf.source_nexthop.mrib_route_metric = | |
665 | qpim_infinite_assert_metric.route_metric; | |
666 | up->rpf.rpf_addr.family = AF_INET; | |
667 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
668 | ||
669 | up->ifchannels = list_new(); | |
670 | up->ifchannels->cmp = (int (*)(void *, void *))pim_ifchannel_compare; | |
671 | ||
672 | if (up->sg.src.s_addr != INADDR_ANY) | |
9b29ea95 | 673 | wheel_add_item(pim->upstream_sg_wheel, up); |
d62a17ae | 674 | |
2002dcdb | 675 | rpf_result = pim_rpf_update(pim, up, NULL, 1); |
d62a17ae | 676 | if (rpf_result == PIM_RPF_FAILURE) { |
677 | struct prefix nht_p; | |
678 | ||
679 | if (PIM_DEBUG_TRACE) | |
680 | zlog_debug( | |
681 | "%s: Attempting to create upstream(%s), Unable to RPF for source", | |
682 | __PRETTY_FUNCTION__, up->sg_str); | |
683 | ||
684 | nht_p.family = AF_INET; | |
685 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
686 | nht_p.u.prefix4 = up->upstream_addr; | |
2002dcdb | 687 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL); |
d62a17ae | 688 | |
689 | if (up->parent) { | |
690 | listnode_delete(up->parent->sources, up); | |
691 | up->parent = NULL; | |
692 | } | |
693 | ||
694 | if (up->sg.src.s_addr != INADDR_ANY) | |
9b29ea95 | 695 | wheel_remove_item(pim->upstream_sg_wheel, up); |
d62a17ae | 696 | |
9b29ea95 | 697 | pim_upstream_remove_children(pim, up); |
d62a17ae | 698 | if (up->sources) |
699 | list_delete(up->sources); | |
700 | ||
a5d4c69d DS |
701 | list_delete(up->ifchannels); |
702 | ||
9b29ea95 | 703 | hash_release(pim->upstream_hash, up); |
d62a17ae | 704 | XFREE(MTYPE_PIM_UPSTREAM, up); |
705 | return NULL; | |
706 | } | |
707 | ||
708 | if (up->rpf.source_nexthop.interface) { | |
709 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
710 | if (pim_ifp) | |
711 | up->channel_oil = pim_channel_oil_add( | |
611925dc | 712 | pim, &up->sg, pim_ifp->mroute_vif_index); |
d62a17ae | 713 | } |
9b29ea95 | 714 | listnode_add_sort(pim->upstream_list, up); |
d62a17ae | 715 | |
716 | if (PIM_DEBUG_TRACE) { | |
717 | zlog_debug( | |
718 | "%s: Created Upstream %s upstream_addr %s ref count %d increment", | |
719 | __PRETTY_FUNCTION__, up->sg_str, | |
720 | inet_ntoa(up->upstream_addr), up->ref_count); | |
721 | } | |
722 | ||
723 | return up; | |
12e41d03 DL |
724 | } |
725 | ||
9b29ea95 DS |
726 | struct pim_upstream *pim_upstream_find(struct pim_instance *pim, |
727 | struct prefix_sg *sg) | |
12e41d03 | 728 | { |
d62a17ae | 729 | struct pim_upstream lookup; |
730 | struct pim_upstream *up = NULL; | |
12e41d03 | 731 | |
d62a17ae | 732 | lookup.sg = *sg; |
9b29ea95 | 733 | up = hash_lookup(pim->upstream_hash, &lookup); |
d62a17ae | 734 | return up; |
12e41d03 DL |
735 | } |
736 | ||
d62a17ae | 737 | struct pim_upstream *pim_upstream_find_or_add(struct prefix_sg *sg, |
738 | struct interface *incoming, | |
739 | int flags, const char *name) | |
e711cd3c | 740 | { |
d62a17ae | 741 | struct pim_upstream *up; |
9b29ea95 DS |
742 | struct pim_interface *pim_ifp; |
743 | ||
744 | pim_ifp = incoming->info; | |
d62a17ae | 745 | |
9b29ea95 | 746 | up = pim_upstream_find(pim_ifp->pim, sg); |
d62a17ae | 747 | |
748 | if (up) { | |
749 | if (!(up->flags & flags)) { | |
750 | up->flags |= flags; | |
751 | up->ref_count++; | |
752 | if (PIM_DEBUG_TRACE) | |
753 | zlog_debug( | |
754 | "%s(%s): upstream %s ref count %d increment", | |
755 | __PRETTY_FUNCTION__, name, up->sg_str, | |
756 | up->ref_count); | |
757 | } | |
758 | } else | |
0885a9f1 DS |
759 | up = pim_upstream_add(pim_ifp->pim, sg, incoming, flags, name, |
760 | NULL); | |
d62a17ae | 761 | |
762 | return up; | |
e711cd3c DS |
763 | } |
764 | ||
d62a17ae | 765 | void pim_upstream_ref(struct pim_upstream *up, int flags, const char *name) |
1bf16443 | 766 | { |
d62a17ae | 767 | up->flags |= flags; |
768 | ++up->ref_count; | |
769 | if (PIM_DEBUG_TRACE) | |
770 | zlog_debug("%s(%s): upstream %s ref count %d increment", | |
771 | __PRETTY_FUNCTION__, name, up->sg_str, | |
772 | up->ref_count); | |
1bf16443 | 773 | } |
774 | ||
2002dcdb DS |
775 | struct pim_upstream *pim_upstream_add(struct pim_instance *pim, |
776 | struct prefix_sg *sg, | |
d62a17ae | 777 | struct interface *incoming, int flags, |
0885a9f1 DS |
778 | const char *name, |
779 | struct pim_ifchannel *ch) | |
12e41d03 | 780 | { |
d62a17ae | 781 | struct pim_upstream *up = NULL; |
782 | int found = 0; | |
9b29ea95 | 783 | |
2002dcdb | 784 | up = pim_upstream_find(pim, sg); |
d62a17ae | 785 | if (up) { |
786 | pim_upstream_ref(up, flags, name); | |
787 | found = 1; | |
788 | } else { | |
0885a9f1 | 789 | up = pim_upstream_new(pim, sg, incoming, flags, ch); |
d62a17ae | 790 | } |
791 | ||
792 | if (PIM_DEBUG_TRACE) { | |
793 | if (up) { | |
794 | char buf[PREFIX2STR_BUFFER]; | |
795 | prefix2str(&up->rpf.rpf_addr, buf, sizeof(buf)); | |
796 | zlog_debug("%s(%s): %s, iif %s (%s) found: %d: ref_count: %d", | |
f4075cb4 | 797 | __PRETTY_FUNCTION__, name, |
55785900 CS |
798 | up->sg_str, buf, up->rpf.source_nexthop.interface ? |
799 | up->rpf.source_nexthop.interface->name : "NIL" , | |
800 | found, up->ref_count); | |
d62a17ae | 801 | } else |
802 | zlog_debug("%s(%s): (%s) failure to create", | |
803 | __PRETTY_FUNCTION__, name, | |
804 | pim_str_sg_dump(sg)); | |
805 | } | |
12e41d03 | 806 | |
d62a17ae | 807 | return up; |
12e41d03 DL |
808 | } |
809 | ||
c8fc07cb DS |
810 | /* |
811 | * Passed in up must be the upstream for ch. starch is NULL if no | |
812 | * information | |
813 | */ | |
d62a17ae | 814 | int pim_upstream_evaluate_join_desired_interface(struct pim_upstream *up, |
815 | struct pim_ifchannel *ch, | |
816 | struct pim_ifchannel *starch) | |
7a3ddda5 | 817 | { |
d62a17ae | 818 | if (ch) { |
819 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
820 | return 0; | |
821 | ||
822 | if (!pim_macro_ch_lost_assert(ch) | |
823 | && pim_macro_chisin_joins_or_include(ch)) | |
824 | return 1; | |
825 | } | |
826 | ||
827 | /* | |
828 | * joins (*,G) | |
829 | */ | |
830 | if (starch) { | |
831 | if (PIM_IF_FLAG_TEST_S_G_RPT(starch->upstream->flags)) | |
832 | return 0; | |
833 | ||
834 | if (!pim_macro_ch_lost_assert(starch) | |
835 | && pim_macro_chisin_joins_or_include(starch)) | |
836 | return 1; | |
837 | } | |
838 | ||
839 | return 0; | |
7a3ddda5 DS |
840 | } |
841 | ||
12e41d03 DL |
842 | /* |
843 | Evaluate JoinDesired(S,G): | |
844 | ||
845 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
846 | in the set: | |
847 | ||
848 | inherited_olist(S,G) = | |
849 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
850 | ||
851 | JoinDesired(S,G) may be affected by changes in the following: | |
852 | ||
853 | pim_ifp->primary_address | |
854 | pim_ifp->pim_dr_addr | |
855 | ch->ifassert_winner_metric | |
856 | ch->ifassert_winner | |
d62a17ae | 857 | ch->local_ifmembership |
12e41d03 DL |
858 | ch->ifjoin_state |
859 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
860 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
861 | ch->upstream->rpf.source_nexthop.interface | |
862 | ||
863 | See also pim_upstream_update_join_desired() below. | |
864 | */ | |
9b29ea95 DS |
865 | int pim_upstream_evaluate_join_desired(struct pim_instance *pim, |
866 | struct pim_upstream *up) | |
12e41d03 | 867 | { |
d62a17ae | 868 | struct interface *ifp; |
869 | struct listnode *node; | |
870 | struct pim_ifchannel *ch, *starch; | |
871 | struct pim_upstream *starup = up->parent; | |
872 | int ret = 0; | |
12e41d03 | 873 | |
9b29ea95 | 874 | for (ALL_LIST_ELEMENTS_RO(vrf_iflist(pim->vrf_id), node, ifp)) { |
d62a17ae | 875 | if (!ifp->info) |
876 | continue; | |
c8fc07cb | 877 | |
d62a17ae | 878 | ch = pim_ifchannel_find(ifp, &up->sg); |
c8fc07cb | 879 | |
d62a17ae | 880 | if (starup) |
881 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
882 | else | |
883 | starch = NULL; | |
c8fc07cb | 884 | |
d62a17ae | 885 | if (!ch && !starch) |
886 | continue; | |
12e41d03 | 887 | |
d62a17ae | 888 | ret += pim_upstream_evaluate_join_desired_interface(up, ch, |
889 | starch); | |
890 | } /* scan iface channel list */ | |
12e41d03 | 891 | |
d62a17ae | 892 | return ret; /* false */ |
12e41d03 DL |
893 | } |
894 | ||
895 | /* | |
896 | See also pim_upstream_evaluate_join_desired() above. | |
897 | */ | |
9b29ea95 DS |
898 | void pim_upstream_update_join_desired(struct pim_instance *pim, |
899 | struct pim_upstream *up) | |
12e41d03 | 900 | { |
d62a17ae | 901 | int was_join_desired; /* boolean */ |
902 | int is_join_desired; /* boolean */ | |
903 | ||
904 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
905 | ||
9b29ea95 | 906 | is_join_desired = pim_upstream_evaluate_join_desired(pim, up); |
d62a17ae | 907 | if (is_join_desired) |
908 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
909 | else | |
910 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
911 | ||
912 | /* switched from false to true */ | |
913 | if (is_join_desired && !was_join_desired) { | |
1eca8576 | 914 | pim_upstream_switch(pim, up, PIM_UPSTREAM_JOINED); |
d62a17ae | 915 | return; |
916 | } | |
917 | ||
918 | /* switched from true to false */ | |
919 | if (!is_join_desired && was_join_desired) { | |
1eca8576 | 920 | pim_upstream_switch(pim, up, PIM_UPSTREAM_NOTJOINED); |
d62a17ae | 921 | return; |
922 | } | |
12e41d03 DL |
923 | } |
924 | ||
925 | /* | |
926 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
927 | Transitions from Joined State | |
928 | RPF'(S,G) GenID changes | |
929 | ||
930 | The upstream (S,G) state machine remains in Joined state. If the | |
931 | Join Timer is set to expire in more than t_override seconds, reset | |
932 | it so that it expires after t_override seconds. | |
933 | */ | |
9b29ea95 DS |
934 | void pim_upstream_rpf_genid_changed(struct pim_instance *pim, |
935 | struct in_addr neigh_addr) | |
12e41d03 | 936 | { |
d62a17ae | 937 | struct listnode *up_node; |
938 | struct listnode *up_nextnode; | |
939 | struct pim_upstream *up; | |
940 | ||
941 | /* | |
942 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
943 | */ | |
9b29ea95 | 944 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { |
d62a17ae | 945 | |
946 | if (PIM_DEBUG_TRACE) { | |
947 | char neigh_str[INET_ADDRSTRLEN]; | |
948 | char rpf_addr_str[PREFIX_STRLEN]; | |
949 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, | |
950 | sizeof(neigh_str)); | |
951 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, | |
952 | sizeof(rpf_addr_str)); | |
953 | zlog_debug( | |
8dbdb215 DS |
954 | "%s: matching neigh=%s against upstream (S,G)=%s[%s] joined=%d rpf_addr=%s", |
955 | __PRETTY_FUNCTION__, neigh_str, up->sg_str, pim->vrf->name, | |
d62a17ae | 956 | up->join_state == PIM_UPSTREAM_JOINED, |
957 | rpf_addr_str); | |
958 | } | |
959 | ||
960 | /* consider only (S,G) upstream in Joined state */ | |
961 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
962 | continue; | |
963 | ||
964 | /* match RPF'(S,G)=neigh_addr */ | |
965 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) | |
966 | continue; | |
967 | ||
968 | pim_upstream_join_timer_decrease_to_t_override( | |
969 | "RPF'(S,G) GenID change", up); | |
970 | } | |
12e41d03 DL |
971 | } |
972 | ||
973 | ||
974 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
975 | struct interface *old_rpf_ifp) | |
976 | { | |
d62a17ae | 977 | struct listnode *chnode; |
978 | struct listnode *chnextnode; | |
979 | struct pim_ifchannel *ch; | |
980 | ||
981 | /* search all ifchannels */ | |
982 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
983 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
984 | if ( | |
985 | /* RPF_interface(S) was NOT I */ | |
986 | (old_rpf_ifp == ch->interface) && | |
987 | /* RPF_interface(S) stopped being I */ | |
988 | (ch->upstream->rpf.source_nexthop | |
989 | .interface != ch->interface)) { | |
990 | assert_action_a5(ch); | |
991 | } | |
992 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
993 | ||
994 | pim_ifchannel_update_assert_tracking_desired(ch); | |
995 | } | |
12e41d03 DL |
996 | } |
997 | ||
998 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
999 | { | |
d62a17ae | 1000 | struct listnode *chnode; |
1001 | struct listnode *chnextnode; | |
1002 | struct pim_ifchannel *ch; | |
1003 | ||
1004 | /* scan per-interface (S,G) state */ | |
1005 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1006 | pim_ifchannel_update_could_assert(ch); | |
1007 | } /* scan iface channel list */ | |
12e41d03 DL |
1008 | } |
1009 | ||
1010 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
1011 | { | |
d62a17ae | 1012 | struct listnode *chnode; |
1013 | struct listnode *chnextnode; | |
1014 | struct pim_ifchannel *ch; | |
12e41d03 | 1015 | |
d62a17ae | 1016 | /* scan per-interface (S,G) state */ |
1017 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1018 | pim_ifchannel_update_my_assert_metric(ch); | |
12e41d03 | 1019 | |
d62a17ae | 1020 | } /* scan iface channel list */ |
12e41d03 DL |
1021 | } |
1022 | ||
1023 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
1024 | { | |
d62a17ae | 1025 | struct listnode *chnode; |
1026 | struct listnode *chnextnode; | |
1027 | struct pim_interface *pim_ifp; | |
1028 | struct pim_ifchannel *ch; | |
1029 | ||
1030 | /* scan per-interface (S,G) state */ | |
1031 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1032 | if (!ch->interface) | |
1033 | continue; | |
1034 | pim_ifp = ch->interface->info; | |
1035 | if (!pim_ifp) | |
1036 | continue; | |
1037 | ||
1038 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1039 | ||
1040 | } /* scan iface channel list */ | |
12e41d03 | 1041 | } |
f14248dd | 1042 | |
1bf16443 | 1043 | /* When kat is stopped CouldRegister goes to false so we need to |
1044 | * transition the (S, G) on FHR to NI state and remove reg tunnel | |
1045 | * from the OIL */ | |
9b29ea95 DS |
1046 | static void pim_upstream_fhr_kat_expiry(struct pim_instance *pim, |
1047 | struct pim_upstream *up) | |
1bf16443 | 1048 | { |
d62a17ae | 1049 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
1050 | return; | |
1051 | ||
1052 | if (PIM_DEBUG_TRACE) | |
1053 | zlog_debug("kat expired on %s; clear fhr reg state", | |
1054 | up->sg_str); | |
1055 | ||
1056 | /* stop reg-stop timer */ | |
1057 | THREAD_OFF(up->t_rs_timer); | |
1058 | /* remove regiface from the OIL if it is there*/ | |
9b29ea95 | 1059 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1060 | PIM_OIF_FLAG_PROTO_PIM); |
1061 | /* clear the register state */ | |
1062 | up->reg_state = PIM_REG_NOINFO; | |
1063 | PIM_UPSTREAM_FLAG_UNSET_FHR(up->flags); | |
1bf16443 | 1064 | } |
1065 | ||
1066 | /* When kat is started CouldRegister can go to true. And if it does we | |
1067 | * need to transition the (S, G) on FHR to JOINED state and add reg tunnel | |
1068 | * to the OIL */ | |
1069 | static void pim_upstream_fhr_kat_start(struct pim_upstream *up) | |
1070 | { | |
d62a17ae | 1071 | if (pim_upstream_could_register(up)) { |
1072 | if (PIM_DEBUG_TRACE) | |
1073 | zlog_debug( | |
1074 | "kat started on %s; set fhr reg state to joined", | |
1075 | up->sg_str); | |
1076 | ||
1077 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
1078 | if (up->reg_state == PIM_REG_NOINFO) | |
1079 | pim_register_join(up); | |
1080 | } | |
1bf16443 | 1081 | } |
1082 | ||
f14248dd DS |
1083 | /* |
1084 | * On an RP, the PMBR value must be cleared when the | |
1085 | * Keepalive Timer expires | |
1bf16443 | 1086 | * KAT expiry indicates that flow is inactive. If the flow was created or |
1087 | * maintained by activity now is the time to deref it. | |
f14248dd | 1088 | */ |
d62a17ae | 1089 | static int pim_upstream_keep_alive_timer(struct thread *t) |
f14248dd | 1090 | { |
d62a17ae | 1091 | struct pim_upstream *up; |
8e5f97e3 | 1092 | struct pim_instance *pim; |
d62a17ae | 1093 | |
1094 | up = THREAD_ARG(t); | |
8e5f97e3 | 1095 | pim = up->channel_oil->pim; |
d62a17ae | 1096 | |
8e5f97e3 | 1097 | if (I_am_RP(pim, up->sg.grp)) { |
d62a17ae | 1098 | pim_br_clear_pmbr(&up->sg); |
1099 | /* | |
1100 | * We need to do more here :) | |
1101 | * But this is the start. | |
1102 | */ | |
1103 | } | |
1104 | ||
1105 | /* source is no longer active - pull the SA from MSDP's cache */ | |
472ad383 | 1106 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 1107 | |
1108 | /* if entry was created because of activity we need to deref it */ | |
1109 | if (PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
8e5f97e3 | 1110 | pim_upstream_fhr_kat_expiry(pim, up); |
d62a17ae | 1111 | if (PIM_DEBUG_TRACE) |
8dbdb215 DS |
1112 | zlog_debug("kat expired on %s[%s]; remove stream reference", |
1113 | up->sg_str, pim->vrf->name); | |
d62a17ae | 1114 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(up->flags); |
8e5f97e3 | 1115 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
d62a17ae | 1116 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) { |
8022df6a DS |
1117 | struct pim_upstream *parent = up->parent; |
1118 | ||
d62a17ae | 1119 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(up->flags); |
8e5f97e3 | 1120 | pim_upstream_del(pim, up, __PRETTY_FUNCTION__); |
8022df6a DS |
1121 | |
1122 | if (parent) { | |
1123 | pim_jp_agg_single_upstream_send(&parent->rpf, | |
1124 | parent, true); | |
1125 | } | |
d62a17ae | 1126 | } |
1127 | ||
1128 | return 0; | |
f14248dd DS |
1129 | } |
1130 | ||
d62a17ae | 1131 | void pim_upstream_keep_alive_timer_start(struct pim_upstream *up, uint32_t time) |
f14248dd | 1132 | { |
d62a17ae | 1133 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { |
1134 | if (PIM_DEBUG_TRACE) | |
1135 | zlog_debug("kat start on %s with no stream reference", | |
1136 | up->sg_str); | |
1137 | } | |
1138 | THREAD_OFF(up->t_ka_timer); | |
1139 | thread_add_timer(master, pim_upstream_keep_alive_timer, up, time, | |
1140 | &up->t_ka_timer); | |
1141 | ||
1142 | /* any time keepalive is started against a SG we will have to | |
1143 | * re-evaluate our active source database */ | |
1144 | pim_msdp_sa_local_update(up); | |
1bf16443 | 1145 | } |
1146 | ||
1147 | /* MSDP on RP needs to know if a source is registerable to this RP */ | |
d62a17ae | 1148 | static int pim_upstream_msdp_reg_timer(struct thread *t) |
1bf16443 | 1149 | { |
472ad383 DS |
1150 | struct pim_upstream *up = THREAD_ARG(t); |
1151 | struct pim_instance *pim = up->channel_oil->pim; | |
1bf16443 | 1152 | |
d62a17ae | 1153 | /* source is no longer active - pull the SA from MSDP's cache */ |
472ad383 | 1154 | pim_msdp_sa_local_del(pim, &up->sg); |
d62a17ae | 1155 | return 1; |
1bf16443 | 1156 | } |
d62a17ae | 1157 | void pim_upstream_msdp_reg_timer_start(struct pim_upstream *up) |
1bf16443 | 1158 | { |
d62a17ae | 1159 | THREAD_OFF(up->t_msdp_reg_timer); |
1160 | thread_add_timer(master, pim_upstream_msdp_reg_timer, up, | |
1161 | PIM_MSDP_REG_RXED_PERIOD, &up->t_msdp_reg_timer); | |
1bf16443 | 1162 | |
d62a17ae | 1163 | pim_msdp_sa_local_update(up); |
f14248dd | 1164 | } |
cb40b272 DS |
1165 | |
1166 | /* | |
1167 | * 4.2.1 Last-Hop Switchover to the SPT | |
1168 | * | |
1169 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
1170 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
1171 | * router, it has the option of switching to receive the traffic on a | |
1172 | * shortest path tree (SPT). | |
1173 | * | |
1174 | * The decision for a router to switch to the SPT is controlled as | |
1175 | * follows: | |
1176 | * | |
1177 | * void | |
1178 | * CheckSwitchToSpt(S,G) { | |
1179 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
1180 | * (+) pim_include(S,G) != NULL ) | |
1181 | * AND SwitchToSptDesired(S,G) ) { | |
1182 | * # Note: Restarting the KAT will result in the SPT switch | |
1183 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1184 | * } | |
1185 | * } | |
1186 | * | |
1187 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
1188 | * defined. An "infinite threshold" policy can be implemented by making | |
1189 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
1190 | * first packet" policy can be implemented by making | |
1191 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
1192 | * received for the source and group. | |
1193 | */ | |
8e5f97e3 DS |
1194 | int pim_upstream_switch_to_spt_desired(struct pim_instance *pim, |
1195 | struct prefix_sg *sg) | |
cb40b272 | 1196 | { |
8e5f97e3 | 1197 | if (I_am_RP(pim, sg->grp)) |
d62a17ae | 1198 | return 1; |
a3b58b4a | 1199 | |
d62a17ae | 1200 | return 0; |
cb40b272 | 1201 | } |
d7259eac | 1202 | |
d62a17ae | 1203 | int pim_upstream_is_sg_rpt(struct pim_upstream *up) |
80d9c3a0 | 1204 | { |
d62a17ae | 1205 | struct listnode *chnode; |
1206 | struct pim_ifchannel *ch; | |
f21597f0 | 1207 | |
d62a17ae | 1208 | for (ALL_LIST_ELEMENTS_RO(up->ifchannels, chnode, ch)) { |
1209 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
1210 | return 1; | |
1211 | } | |
e43b8697 | 1212 | |
d62a17ae | 1213 | return 0; |
80d9c3a0 | 1214 | } |
3a66b17b DS |
1215 | /* |
1216 | * After receiving a packet set SPTbit: | |
1217 | * void | |
1218 | * Update_SPTbit(S,G,iif) { | |
1219 | * if ( iif == RPF_interface(S) | |
1220 | * AND JoinDesired(S,G) == TRUE | |
1221 | * AND ( DirectlyConnected(S) == TRUE | |
1222 | * OR RPF_interface(S) != RPF_interface(RP(G)) | |
1223 | * OR inherited_olist(S,G,rpt) == NULL | |
1224 | * OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1225 | * ( RPF'(S,G) != NULL ) ) | |
1226 | * OR ( I_Am_Assert_Loser(S,G,iif) ) { | |
1227 | * Set SPTbit(S,G) to TRUE | |
1228 | * } | |
1229 | * } | |
1230 | */ | |
d62a17ae | 1231 | void pim_upstream_set_sptbit(struct pim_upstream *up, |
1232 | struct interface *incoming) | |
3a66b17b | 1233 | { |
d62a17ae | 1234 | struct pim_upstream *starup = up->parent; |
1235 | ||
1236 | // iif == RPF_interfvace(S) | |
1237 | if (up->rpf.source_nexthop.interface != incoming) { | |
1238 | if (PIM_DEBUG_TRACE) | |
1239 | zlog_debug( | |
1240 | "%s: Incoming Interface: %s is different than RPF_interface(S) %s", | |
1241 | __PRETTY_FUNCTION__, incoming->name, | |
1242 | up->rpf.source_nexthop.interface->name); | |
1243 | return; | |
1244 | } | |
1245 | ||
1246 | // AND JoinDesired(S,G) == TRUE | |
1247 | // FIXME | |
1248 | ||
1249 | // DirectlyConnected(S) == TRUE | |
1250 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1251 | up->sg.src)) { | |
1252 | if (PIM_DEBUG_TRACE) | |
1253 | zlog_debug("%s: %s is directly connected to the source", | |
1254 | __PRETTY_FUNCTION__, up->sg_str); | |
1255 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1256 | return; | |
1257 | } | |
1258 | ||
1259 | // OR RPF_interface(S) != RPF_interface(RP(G)) | |
1260 | if (!starup | |
1261 | || up->rpf.source_nexthop | |
1262 | .interface != starup->rpf.source_nexthop.interface) { | |
1263 | if (PIM_DEBUG_TRACE) | |
1264 | zlog_debug( | |
1265 | "%s: %s RPF_interface(S) != RPF_interface(RP(G))", | |
1266 | __PRETTY_FUNCTION__, up->sg_str); | |
1267 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1268 | return; | |
1269 | } | |
1270 | ||
1271 | // OR inherited_olist(S,G,rpt) == NULL | |
1272 | if (pim_upstream_is_sg_rpt(up) | |
1273 | && pim_upstream_empty_inherited_olist(up)) { | |
1274 | if (PIM_DEBUG_TRACE) | |
1275 | zlog_debug("%s: %s OR inherited_olist(S,G,rpt) == NULL", | |
1276 | __PRETTY_FUNCTION__, up->sg_str); | |
1277 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1278 | return; | |
1279 | } | |
1280 | ||
1281 | // OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1282 | // ( RPF'(S,G) != NULL ) ) | |
1283 | if (up->parent && pim_rpf_is_same(&up->rpf, &up->parent->rpf)) { | |
1284 | if (PIM_DEBUG_TRACE) | |
1285 | zlog_debug("%s: %s RPF'(S,G) is the same as RPF'(*,G)", | |
1286 | __PRETTY_FUNCTION__, up->sg_str); | |
1287 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1288 | return; | |
1289 | } | |
1290 | ||
1291 | return; | |
3a66b17b | 1292 | } |
80d9c3a0 | 1293 | |
d62a17ae | 1294 | const char *pim_upstream_state2str(enum pim_upstream_state join_state) |
d7259eac | 1295 | { |
d62a17ae | 1296 | switch (join_state) { |
1297 | case PIM_UPSTREAM_NOTJOINED: | |
1298 | return "NotJoined"; | |
1299 | break; | |
1300 | case PIM_UPSTREAM_JOINED: | |
1301 | return "Joined"; | |
1302 | break; | |
1303 | } | |
1304 | return "Unknown"; | |
d7259eac | 1305 | } |
627ed2a3 | 1306 | |
d62a17ae | 1307 | const char *pim_reg_state2str(enum pim_reg_state reg_state, char *state_str) |
e0e127b0 | 1308 | { |
d62a17ae | 1309 | switch (reg_state) { |
1310 | case PIM_REG_NOINFO: | |
1311 | strcpy(state_str, "RegNoInfo"); | |
1312 | break; | |
1313 | case PIM_REG_JOIN: | |
1314 | strcpy(state_str, "RegJoined"); | |
1315 | break; | |
1316 | case PIM_REG_JOIN_PENDING: | |
1317 | strcpy(state_str, "RegJoinPend"); | |
1318 | break; | |
1319 | case PIM_REG_PRUNE: | |
1320 | strcpy(state_str, "RegPrune"); | |
1321 | break; | |
1322 | default: | |
1323 | strcpy(state_str, "RegUnknown"); | |
1324 | } | |
1325 | return state_str; | |
e0e127b0 | 1326 | } |
1327 | ||
d62a17ae | 1328 | static int pim_upstream_register_stop_timer(struct thread *t) |
627ed2a3 | 1329 | { |
d62a17ae | 1330 | struct pim_interface *pim_ifp; |
8e5f97e3 | 1331 | struct pim_instance *pim; |
d62a17ae | 1332 | struct pim_upstream *up; |
1333 | struct pim_rpf *rpg; | |
1334 | struct ip ip_hdr; | |
1335 | up = THREAD_ARG(t); | |
8e5f97e3 | 1336 | pim = up->channel_oil->pim; |
d62a17ae | 1337 | |
1338 | if (PIM_DEBUG_TRACE) { | |
1339 | char state_str[PIM_REG_STATE_STR_LEN]; | |
8dbdb215 DS |
1340 | zlog_debug("%s: (S,G)=%s[%s] upstream register stop timer %s", |
1341 | __PRETTY_FUNCTION__, up->sg_str, pim->vrf->name, | |
d62a17ae | 1342 | pim_reg_state2str(up->reg_state, state_str)); |
1343 | } | |
1344 | ||
1345 | switch (up->reg_state) { | |
1346 | case PIM_REG_JOIN_PENDING: | |
1347 | up->reg_state = PIM_REG_JOIN; | |
8e5f97e3 | 1348 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1349 | PIM_OIF_FLAG_PROTO_PIM); |
1350 | break; | |
1351 | case PIM_REG_JOIN: | |
1352 | break; | |
1353 | case PIM_REG_PRUNE: | |
1354 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
1355 | if (!pim_ifp) { | |
1356 | if (PIM_DEBUG_TRACE) | |
1357 | zlog_debug( | |
1358 | "%s: Interface: %s is not configured for pim", | |
1359 | __PRETTY_FUNCTION__, | |
1360 | up->rpf.source_nexthop.interface->name); | |
1361 | return 0; | |
1362 | } | |
1363 | up->reg_state = PIM_REG_JOIN_PENDING; | |
1364 | pim_upstream_start_register_stop_timer(up, 1); | |
1365 | ||
1366 | if (((up->channel_oil->cc.lastused / 100) | |
1367 | > PIM_KEEPALIVE_PERIOD) | |
d9c9a9ee | 1368 | && (I_am_RP(pim_ifp->pim, up->sg.grp))) { |
d62a17ae | 1369 | if (PIM_DEBUG_TRACE) |
1370 | zlog_debug( | |
1371 | "%s: Stop sending the register, because I am the RP and we haven't seen a packet in a while", | |
1372 | __PRETTY_FUNCTION__); | |
1373 | return 0; | |
1374 | } | |
d9c9a9ee | 1375 | rpg = RP(pim_ifp->pim, up->sg.grp); |
1e7a3a2a DS |
1376 | if (!rpg) { |
1377 | if (PIM_DEBUG_TRACE) | |
1378 | zlog_debug( | |
1379 | "%s: Cannot send register for %s no RPF to the RP", | |
1380 | __PRETTY_FUNCTION__, up->sg_str); | |
1381 | return 0; | |
1382 | } | |
d62a17ae | 1383 | memset(&ip_hdr, 0, sizeof(struct ip)); |
1384 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
1385 | ip_hdr.ip_hl = 5; | |
1386 | ip_hdr.ip_v = 4; | |
1387 | ip_hdr.ip_src = up->sg.src; | |
1388 | ip_hdr.ip_dst = up->sg.grp; | |
1389 | ip_hdr.ip_len = htons(20); | |
1390 | // checksum is broken | |
1391 | pim_register_send((uint8_t *)&ip_hdr, sizeof(struct ip), | |
1392 | pim_ifp->primary_address, rpg, 1, up); | |
1393 | break; | |
1394 | default: | |
1395 | break; | |
70e7fda8 | 1396 | } |
d62a17ae | 1397 | |
1398 | return 0; | |
627ed2a3 DS |
1399 | } |
1400 | ||
d62a17ae | 1401 | void pim_upstream_start_register_stop_timer(struct pim_upstream *up, |
1402 | int null_register) | |
627ed2a3 | 1403 | { |
d62a17ae | 1404 | uint32_t time; |
1405 | ||
1406 | THREAD_TIMER_OFF(up->t_rs_timer); | |
1407 | ||
1408 | if (!null_register) { | |
1409 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1410 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1411 | time = lower + (random() % (upper - lower + 1)) | |
1412 | - PIM_REGISTER_PROBE_PERIOD; | |
1413 | } else | |
1414 | time = PIM_REGISTER_PROBE_PERIOD; | |
1415 | ||
1416 | if (PIM_DEBUG_TRACE) { | |
1417 | zlog_debug( | |
1418 | "%s: (S,G)=%s Starting upstream register stop timer %d", | |
1419 | __PRETTY_FUNCTION__, up->sg_str, time); | |
1420 | } | |
1421 | thread_add_timer(master, pim_upstream_register_stop_timer, up, time, | |
1422 | &up->t_rs_timer); | |
627ed2a3 | 1423 | } |
4fdc8f36 | 1424 | |
9b29ea95 DS |
1425 | int pim_upstream_inherited_olist_decide(struct pim_instance *pim, |
1426 | struct pim_upstream *up) | |
4fdc8f36 | 1427 | { |
d62a17ae | 1428 | struct interface *ifp; |
1429 | struct pim_interface *pim_ifp = NULL; | |
1430 | struct pim_ifchannel *ch, *starch; | |
1431 | struct listnode *node; | |
1432 | struct pim_upstream *starup = up->parent; | |
1433 | int output_intf = 0; | |
1434 | ||
1435 | if (up->rpf.source_nexthop.interface) | |
1436 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
1437 | else { | |
1438 | if (PIM_DEBUG_TRACE) | |
1439 | zlog_debug("%s: up %s RPF is not present", | |
1440 | __PRETTY_FUNCTION__, up->sg_str); | |
1441 | } | |
1442 | if (pim_ifp && !up->channel_oil) | |
611925dc DS |
1443 | up->channel_oil = pim_channel_oil_add( |
1444 | pim, &up->sg, pim_ifp->mroute_vif_index); | |
d62a17ae | 1445 | |
9b29ea95 | 1446 | for (ALL_LIST_ELEMENTS_RO(vrf_iflist(pim->vrf_id), node, ifp)) { |
d62a17ae | 1447 | if (!ifp->info) |
1448 | continue; | |
1449 | ||
1450 | ch = pim_ifchannel_find(ifp, &up->sg); | |
1451 | ||
1452 | if (starup) | |
1453 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
1454 | else | |
1455 | starch = NULL; | |
1456 | ||
1457 | if (!ch && !starch) | |
1458 | continue; | |
1459 | ||
1460 | if (pim_upstream_evaluate_join_desired_interface(up, ch, | |
1461 | starch)) { | |
1462 | int flag = PIM_OIF_FLAG_PROTO_PIM; | |
1463 | ||
1464 | if (!ch) | |
1465 | flag = PIM_OIF_FLAG_PROTO_STAR; | |
1466 | ||
1467 | pim_channel_add_oif(up->channel_oil, ifp, flag); | |
1468 | output_intf++; | |
1469 | } | |
1470 | } | |
1471 | ||
1472 | return output_intf; | |
b5183fd1 DS |
1473 | } |
1474 | ||
1475 | /* | |
1476 | * For a given upstream, determine the inherited_olist | |
1477 | * and apply it. | |
1478 | * | |
1479 | * inherited_olist(S,G,rpt) = | |
1480 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1481 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1482 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1483 | * | |
1484 | * inherited_olist(S,G) = | |
1485 | * inherited_olist(S,G,rpt) (+) | |
1486 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1487 | * | |
1488 | * return 1 if there are any output interfaces | |
1489 | * return 0 if there are not any output interfaces | |
1490 | */ | |
9b29ea95 DS |
1491 | int pim_upstream_inherited_olist(struct pim_instance *pim, |
1492 | struct pim_upstream *up) | |
b5183fd1 | 1493 | { |
9b29ea95 | 1494 | int output_intf = pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 1495 | |
1496 | /* | |
1497 | * If we have output_intf switch state to Join and work like normal | |
1498 | * If we don't have an output_intf that means we are probably a | |
1499 | * switch on a stick so turn on forwarding to just accept the | |
1500 | * incoming packets so we don't bother the other stuff! | |
1501 | */ | |
1502 | if (output_intf) | |
1eca8576 | 1503 | pim_upstream_switch(pim, up, PIM_UPSTREAM_JOINED); |
d62a17ae | 1504 | else |
1505 | forward_on(up); | |
1506 | ||
1507 | return output_intf; | |
4fdc8f36 | 1508 | } |
d3dd1804 | 1509 | |
d62a17ae | 1510 | int pim_upstream_empty_inherited_olist(struct pim_upstream *up) |
80d9c3a0 | 1511 | { |
d62a17ae | 1512 | return pim_channel_oil_empty(up->channel_oil); |
80d9c3a0 DS |
1513 | } |
1514 | ||
d3dd1804 DS |
1515 | /* |
1516 | * When we have a new neighbor, | |
1517 | * find upstreams that don't have their rpf_addr | |
1518 | * set and see if the new neighbor allows | |
1519 | * the join to be sent | |
1520 | */ | |
9b29ea95 | 1521 | void pim_upstream_find_new_rpf(struct pim_instance *pim) |
d3dd1804 | 1522 | { |
d62a17ae | 1523 | struct listnode *up_node; |
1524 | struct listnode *up_nextnode; | |
1525 | struct pim_upstream *up; | |
1526 | ||
1527 | /* | |
1528 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
1529 | */ | |
9b29ea95 | 1530 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { |
d62a17ae | 1531 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { |
1532 | if (PIM_DEBUG_TRACE) | |
1533 | zlog_debug( | |
1534 | "Upstream %s without a path to send join, checking", | |
1535 | up->sg_str); | |
2002dcdb | 1536 | pim_rpf_update(pim, up, NULL, 1); |
d62a17ae | 1537 | } |
d3dd1804 | 1538 | } |
d3dd1804 | 1539 | } |
0f588989 | 1540 | |
7c591950 | 1541 | unsigned int pim_upstream_hash_key(void *arg) |
0f588989 | 1542 | { |
d62a17ae | 1543 | struct pim_upstream *up = (struct pim_upstream *)arg; |
0f588989 | 1544 | |
d62a17ae | 1545 | return jhash_2words(up->sg.src.s_addr, up->sg.grp.s_addr, 0); |
0f588989 DS |
1546 | } |
1547 | ||
9b29ea95 | 1548 | void pim_upstream_terminate(struct pim_instance *pim) |
0f588989 | 1549 | { |
9b29ea95 DS |
1550 | if (pim->upstream_list) |
1551 | list_delete(pim->upstream_list); | |
1552 | pim->upstream_list = NULL; | |
0f588989 | 1553 | |
9b29ea95 DS |
1554 | if (pim->upstream_hash) |
1555 | hash_free(pim->upstream_hash); | |
1556 | pim->upstream_hash = NULL; | |
0f588989 DS |
1557 | } |
1558 | ||
7c591950 | 1559 | int pim_upstream_equal(const void *arg1, const void *arg2) |
0f588989 | 1560 | { |
d62a17ae | 1561 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
1562 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
0f588989 | 1563 | |
d62a17ae | 1564 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) |
1565 | && (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
1566 | return 1; | |
0f588989 | 1567 | |
d62a17ae | 1568 | return 0; |
0f588989 DS |
1569 | } |
1570 | ||
1bf16443 | 1571 | /* rfc4601:section-4.2:"Data Packet Forwarding Rules" defines |
1572 | * the cases where kat has to be restarted on rxing traffic - | |
1573 | * | |
1574 | * if( DirectlyConnected(S) == TRUE AND iif == RPF_interface(S) ) { | |
1575 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1576 | * # Note: a register state transition or UpstreamJPState(S,G) | |
1577 | * # transition may happen as a result of restarting | |
1578 | * # KeepaliveTimer, and must be dealt with here. | |
1579 | * } | |
1580 | * if( iif == RPF_interface(S) AND UpstreamJPState(S,G) == Joined AND | |
1581 | * inherited_olist(S,G) != NULL ) { | |
1582 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1583 | * } | |
1584 | */ | |
1585 | static bool pim_upstream_kat_start_ok(struct pim_upstream *up) | |
1586 | { | |
8e5f97e3 DS |
1587 | struct pim_instance *pim = up->channel_oil->pim; |
1588 | ||
d62a17ae | 1589 | /* "iif == RPF_interface(S)" check has to be done by the kernel or hw |
1590 | * so we will skip that here */ | |
1591 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1592 | up->sg.src)) { | |
1593 | return true; | |
1594 | } | |
1595 | ||
1596 | if ((up->join_state == PIM_UPSTREAM_JOINED) | |
1597 | && !pim_upstream_empty_inherited_olist(up)) { | |
1598 | /* XXX: I have added this RP check just for 3.2 and it's a | |
1599 | * digression from | |
1600 | * what rfc-4601 says. Till now we were only running KAT on FHR | |
1601 | * and RP and | |
1602 | * there is some angst around making the change to run it all | |
1603 | * routers that | |
1604 | * maintain the (S, G) state. This is tracked via CM-13601 and | |
1605 | * MUST be | |
1606 | * removed to handle spt turn-arounds correctly in a 3-tier clos | |
1607 | */ | |
8e5f97e3 | 1608 | if (I_am_RP(pim, up->sg.grp)) |
d62a17ae | 1609 | return true; |
1610 | } | |
1611 | ||
1612 | return false; | |
1bf16443 | 1613 | } |
1614 | ||
9c5e4d62 DS |
1615 | /* |
1616 | * Code to check and see if we've received packets on a S,G mroute | |
1617 | * and if so to set the SPT bit appropriately | |
1618 | */ | |
d62a17ae | 1619 | static void pim_upstream_sg_running(void *arg) |
9c5e4d62 | 1620 | { |
d62a17ae | 1621 | struct pim_upstream *up = (struct pim_upstream *)arg; |
8e5f97e3 | 1622 | struct pim_instance *pim = up->channel_oil->pim; |
d62a17ae | 1623 | |
1624 | // No packet can have arrived here if this is the case | |
8e5f97e3 | 1625 | if (!up->channel_oil->installed) { |
d62a17ae | 1626 | if (PIM_DEBUG_TRACE) |
1627 | zlog_debug("%s: %s is not installed in mroute", | |
1628 | __PRETTY_FUNCTION__, up->sg_str); | |
1629 | return; | |
1630 | } | |
1631 | ||
1632 | /* | |
1633 | * This is a bit of a hack | |
1634 | * We've noted that we should rescan but | |
1635 | * we've missed the window for doing so in | |
1636 | * pim_zebra.c for some reason. I am | |
1637 | * only doing this at this point in time | |
1638 | * to get us up and working for the moment | |
1639 | */ | |
1640 | if (up->channel_oil->oil_inherited_rescan) { | |
1641 | if (PIM_DEBUG_TRACE) | |
1642 | zlog_debug( | |
8dbdb215 DS |
1643 | "%s: Handling unscanned inherited_olist for %s[%s]", |
1644 | __PRETTY_FUNCTION__, up->sg_str, pim->vrf->name); | |
8e5f97e3 | 1645 | pim_upstream_inherited_olist_decide(pim, up); |
d62a17ae | 1646 | up->channel_oil->oil_inherited_rescan = 0; |
1647 | } | |
1648 | pim_mroute_update_counters(up->channel_oil); | |
1649 | ||
1650 | // Have we seen packets? | |
1651 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) | |
1652 | && (up->channel_oil->cc.lastused / 100 > 30)) { | |
1653 | if (PIM_DEBUG_TRACE) { | |
1654 | zlog_debug( | |
8dbdb215 DS |
1655 | "%s[%s]: %s old packet count is equal or lastused is greater than 30, (%ld,%ld,%lld)", |
1656 | __PRETTY_FUNCTION__, up->sg_str, pim->vrf->name, | |
d62a17ae | 1657 | up->channel_oil->cc.oldpktcnt, |
1658 | up->channel_oil->cc.pktcnt, | |
1659 | up->channel_oil->cc.lastused / 100); | |
1660 | } | |
1661 | return; | |
e43b8697 | 1662 | } |
d62a17ae | 1663 | |
1664 | if (pim_upstream_kat_start_ok(up)) { | |
1665 | /* Add a source reference to the stream if | |
1666 | * one doesn't already exist */ | |
1667 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
1668 | if (PIM_DEBUG_TRACE) | |
1669 | zlog_debug( | |
8dbdb215 DS |
1670 | "source reference created on kat restart %s[%s]", |
1671 | up->sg_str, pim->vrf->name); | |
d62a17ae | 1672 | |
1673 | pim_upstream_ref(up, PIM_UPSTREAM_FLAG_MASK_SRC_STREAM, | |
1674 | __PRETTY_FUNCTION__); | |
1675 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); | |
1676 | pim_upstream_fhr_kat_start(up); | |
1677 | } | |
19b807ca | 1678 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); |
d62a17ae | 1679 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) |
19b807ca | 1680 | pim_upstream_keep_alive_timer_start(up, pim->keep_alive_time); |
d62a17ae | 1681 | |
1682 | if (up->sptbit != PIM_UPSTREAM_SPTBIT_TRUE) { | |
1683 | pim_upstream_set_sptbit(up, up->rpf.source_nexthop.interface); | |
850a9f99 | 1684 | } |
d62a17ae | 1685 | return; |
9c5e4d62 DS |
1686 | } |
1687 | ||
9b29ea95 | 1688 | void pim_upstream_add_lhr_star_pimreg(struct pim_instance *pim) |
a7b2b1e2 | 1689 | { |
d62a17ae | 1690 | struct pim_upstream *up; |
1691 | struct listnode *node; | |
a7b2b1e2 | 1692 | |
9b29ea95 | 1693 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { |
d62a17ae | 1694 | if (up->sg.src.s_addr != INADDR_ANY) |
1695 | continue; | |
a7b2b1e2 | 1696 | |
d62a17ae | 1697 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) |
1698 | continue; | |
a7b2b1e2 | 1699 | |
9b29ea95 | 1700 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1701 | PIM_OIF_FLAG_PROTO_IGMP); |
1702 | } | |
a7b2b1e2 DS |
1703 | } |
1704 | ||
9b29ea95 DS |
1705 | void pim_upstream_spt_prefix_list_update(struct pim_instance *pim, |
1706 | struct prefix_list *pl) | |
df94f9a9 | 1707 | { |
d62a17ae | 1708 | const char *pname = prefix_list_name(pl); |
df94f9a9 | 1709 | |
9b29ea95 DS |
1710 | if (pim->spt.plist && strcmp(pim->spt.plist, pname) == 0) { |
1711 | pim_upstream_remove_lhr_star_pimreg(pim, pname); | |
d62a17ae | 1712 | } |
df94f9a9 DS |
1713 | } |
1714 | ||
1715 | /* | |
1716 | * nlist -> The new prefix list | |
1717 | * | |
1718 | * Per Group Application of pimreg to the OIL | |
1719 | * If the prefix list tells us DENY then | |
1720 | * we need to Switchover to SPT immediate | |
1721 | * so add the pimreg. | |
1722 | * If the prefix list tells us to ACCEPT than | |
1723 | * we need to Never do the SPT so remove | |
1724 | * the interface | |
1725 | * | |
1726 | */ | |
9b29ea95 DS |
1727 | void pim_upstream_remove_lhr_star_pimreg(struct pim_instance *pim, |
1728 | const char *nlist) | |
a7b2b1e2 | 1729 | { |
d62a17ae | 1730 | struct pim_upstream *up; |
1731 | struct listnode *node; | |
1732 | struct prefix_list *np; | |
1733 | struct prefix g; | |
1734 | enum prefix_list_type apply_new; | |
1735 | ||
1736 | np = prefix_list_lookup(AFI_IP, nlist); | |
1737 | ||
1738 | g.family = AF_INET; | |
1739 | g.prefixlen = IPV4_MAX_PREFIXLEN; | |
1740 | ||
9b29ea95 | 1741 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, node, up)) { |
d62a17ae | 1742 | if (up->sg.src.s_addr != INADDR_ANY) |
1743 | continue; | |
1744 | ||
1745 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) | |
1746 | continue; | |
1747 | ||
1748 | if (!nlist) { | |
9b29ea95 | 1749 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1750 | PIM_OIF_FLAG_PROTO_IGMP); |
1751 | continue; | |
1752 | } | |
1753 | g.u.prefix4 = up->sg.grp; | |
1754 | apply_new = prefix_list_apply(np, &g); | |
1755 | if (apply_new == PREFIX_DENY) | |
9b29ea95 | 1756 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1757 | PIM_OIF_FLAG_PROTO_IGMP); |
1758 | else | |
9b29ea95 | 1759 | pim_channel_del_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1760 | PIM_OIF_FLAG_PROTO_IGMP); |
1761 | } | |
a7b2b1e2 DS |
1762 | } |
1763 | ||
9b29ea95 | 1764 | void pim_upstream_init(struct pim_instance *pim) |
0f588989 | 1765 | { |
9fb302f4 DS |
1766 | char hash_name[64]; |
1767 | ||
9b29ea95 | 1768 | pim->upstream_sg_wheel = |
d62a17ae | 1769 | wheel_init(master, 31000, 100, pim_upstream_hash_key, |
1770 | pim_upstream_sg_running); | |
9fb302f4 DS |
1771 | |
1772 | snprintf(hash_name, 64, "PIM %s Upstream Hash", | |
1773 | pim->vrf->name); | |
9b29ea95 | 1774 | pim->upstream_hash = hash_create_size(8192, pim_upstream_hash_key, |
9fb302f4 | 1775 | pim_upstream_equal, hash_name); |
d62a17ae | 1776 | |
9b29ea95 DS |
1777 | pim->upstream_list = list_new(); |
1778 | pim->upstream_list->del = (void (*)(void *))pim_upstream_free; | |
1779 | pim->upstream_list->cmp = pim_upstream_compare; | |
0f588989 | 1780 | } |