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12e41d03 DL |
1 | /* |
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. | |
ac4d0be5 | 14 | |
12e41d03 DL |
15 | You should have received a copy of the GNU General Public License |
16 | along with this program; see the file COPYING; if not, write to the | |
17 | Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, | |
18 | MA 02110-1301 USA | |
12e41d03 DL |
19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #include "zebra/rib.h" | |
24 | ||
25 | #include "log.h" | |
26 | #include "zclient.h" | |
27 | #include "memory.h" | |
28 | #include "thread.h" | |
29 | #include "linklist.h" | |
dfe43e25 DW |
30 | #include "vty.h" |
31 | #include "plist.h" | |
0f588989 DS |
32 | #include "hash.h" |
33 | #include "jhash.h" | |
9c5e4d62 | 34 | #include "wheel.h" |
12e41d03 DL |
35 | |
36 | #include "pimd.h" | |
37 | #include "pim_pim.h" | |
38 | #include "pim_str.h" | |
39 | #include "pim_time.h" | |
40 | #include "pim_iface.h" | |
41 | #include "pim_join.h" | |
42 | #include "pim_zlookup.h" | |
43 | #include "pim_upstream.h" | |
44 | #include "pim_ifchannel.h" | |
45 | #include "pim_neighbor.h" | |
46 | #include "pim_rpf.h" | |
47 | #include "pim_zebra.h" | |
48 | #include "pim_oil.h" | |
49 | #include "pim_macro.h" | |
8f5f5e91 | 50 | #include "pim_rp.h" |
f14248dd | 51 | #include "pim_br.h" |
627ed2a3 | 52 | #include "pim_register.h" |
3c72d654 | 53 | #include "pim_msdp.h" |
982bff89 | 54 | #include "pim_jp_agg.h" |
1bc98276 | 55 | #include "pim_nht.h" |
15a5dafe | 56 | #include "pim_ssm.h" |
12e41d03 | 57 | |
0f588989 DS |
58 | struct hash *pim_upstream_hash = NULL; |
59 | struct list *pim_upstream_list = NULL; | |
9c5e4d62 | 60 | struct timer_wheel *pim_upstream_sg_wheel = NULL; |
0f588989 | 61 | |
982bff89 | 62 | static void join_timer_stop(struct pim_upstream *up); |
ac4d0be5 | 63 | static void |
64 | pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); | |
12e41d03 | 65 | |
cfa91a87 DS |
66 | /* |
67 | * A (*,G) or a (*,*) is going away | |
68 | * remove the parent pointer from | |
69 | * those pointing at us | |
70 | */ | |
ac4d0be5 | 71 | static void pim_upstream_remove_children(struct pim_upstream *up) |
cfa91a87 | 72 | { |
ac4d0be5 | 73 | struct pim_upstream *child; |
74 | ||
75 | if (!up->sources) | |
76 | return; | |
77 | ||
78 | while (!list_isempty(up->sources)) { | |
79 | child = listnode_head(up->sources); | |
80 | listnode_delete(up->sources, child); | |
81 | if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(child->flags)) { | |
82 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(child->flags); | |
83 | child = pim_upstream_del(child, __PRETTY_FUNCTION__); | |
84 | } | |
85 | if (child) | |
86 | child->parent = NULL; | |
87 | } | |
88 | list_delete(up->sources); | |
89 | up->sources = NULL; | |
cfa91a87 DS |
90 | } |
91 | ||
92 | /* | |
93 | * A (*,G) or a (*,*) is being created | |
94 | * Find the children that would point | |
95 | * at us. | |
96 | */ | |
ac4d0be5 | 97 | static void pim_upstream_find_new_children(struct pim_upstream *up) |
cfa91a87 | 98 | { |
ac4d0be5 | 99 | struct pim_upstream *child; |
100 | struct listnode *ch_node; | |
101 | ||
102 | if ((up->sg.src.s_addr != INADDR_ANY) | |
103 | && (up->sg.grp.s_addr != INADDR_ANY)) | |
104 | return; | |
105 | ||
106 | if ((up->sg.src.s_addr == INADDR_ANY) | |
107 | && (up->sg.grp.s_addr == INADDR_ANY)) | |
108 | return; | |
109 | ||
110 | for (ALL_LIST_ELEMENTS_RO(pim_upstream_list, ch_node, child)) { | |
111 | if ((up->sg.grp.s_addr != INADDR_ANY) | |
112 | && (child->sg.grp.s_addr == up->sg.grp.s_addr) | |
113 | && (child != up)) { | |
114 | child->parent = up; | |
115 | listnode_add_sort(up->sources, child); | |
116 | } | |
03417ccd | 117 | } |
cfa91a87 DS |
118 | } |
119 | ||
4d99418b DS |
120 | /* |
121 | * If we have a (*,*) || (S,*) there is no parent | |
122 | * If we have a (S,G), find the (*,G) | |
123 | * If we have a (*,G), find the (*,*) | |
124 | */ | |
ac4d0be5 | 125 | static struct pim_upstream *pim_upstream_find_parent(struct pim_upstream *child) |
4d99418b | 126 | { |
ac4d0be5 | 127 | struct prefix_sg any = child->sg; |
128 | struct pim_upstream *up = NULL; | |
4d99418b | 129 | |
ac4d0be5 | 130 | // (S,G) |
131 | if ((child->sg.src.s_addr != INADDR_ANY) | |
132 | && (child->sg.grp.s_addr != INADDR_ANY)) { | |
133 | any.src.s_addr = INADDR_ANY; | |
134 | up = pim_upstream_find(&any); | |
03417ccd | 135 | |
ac4d0be5 | 136 | if (up) |
137 | listnode_add(up->sources, child); | |
03417ccd | 138 | |
ac4d0be5 | 139 | return up; |
140 | } | |
4d99418b | 141 | |
ac4d0be5 | 142 | return NULL; |
4d99418b DS |
143 | } |
144 | ||
12e41d03 DL |
145 | void pim_upstream_free(struct pim_upstream *up) |
146 | { | |
ac4d0be5 | 147 | XFREE(MTYPE_PIM_UPSTREAM, up); |
148 | up = NULL; | |
12e41d03 DL |
149 | } |
150 | ||
151 | static void upstream_channel_oil_detach(struct pim_upstream *up) | |
152 | { | |
ac4d0be5 | 153 | if (up->channel_oil) { |
154 | /* Detaching from channel_oil, channel_oil may exist post del, | |
155 | but upstream would not keep reference of it | |
156 | */ | |
157 | pim_channel_oil_del(up->channel_oil); | |
158 | up->channel_oil = NULL; | |
159 | } | |
12e41d03 DL |
160 | } |
161 | ||
ac4d0be5 | 162 | struct pim_upstream *pim_upstream_del(struct pim_upstream *up, const char *name) |
12e41d03 | 163 | { |
ac4d0be5 | 164 | bool notify_msdp = false; |
165 | struct prefix nht_p; | |
166 | ||
167 | if (PIM_DEBUG_TRACE) | |
168 | zlog_debug( | |
169 | "%s(%s): Delete %s ref count: %d , flags: %d c_oil ref count %d (Pre decrement)", | |
170 | __PRETTY_FUNCTION__, name, up->sg_str, up->ref_count, | |
171 | up->flags, up->channel_oil->oil_ref_count); | |
172 | ||
173 | --up->ref_count; | |
174 | ||
175 | if (up->ref_count >= 1) | |
176 | return up; | |
177 | ||
178 | THREAD_OFF(up->t_ka_timer); | |
179 | THREAD_OFF(up->t_rs_timer); | |
180 | THREAD_OFF(up->t_msdp_reg_timer); | |
181 | ||
182 | if (up->join_state == PIM_UPSTREAM_JOINED) { | |
183 | pim_jp_agg_single_upstream_send(&up->rpf, up, 0); | |
184 | ||
185 | if (up->sg.src.s_addr == INADDR_ANY) { | |
186 | /* if a (*, G) entry in the joined state is being | |
187 | * deleted we | |
188 | * need to notify MSDP */ | |
189 | notify_msdp = true; | |
190 | } | |
191 | } | |
192 | ||
193 | join_timer_stop(up); | |
194 | pim_jp_agg_upstream_verification(up, false); | |
195 | up->rpf.source_nexthop.interface = NULL; | |
196 | ||
197 | if (up->sg.src.s_addr != INADDR_ANY) { | |
198 | wheel_remove_item(pim_upstream_sg_wheel, up); | |
199 | notify_msdp = true; | |
200 | } | |
201 | ||
202 | pim_upstream_remove_children(up); | |
203 | if (up->sources) | |
204 | list_delete(up->sources); | |
205 | up->sources = NULL; | |
206 | pim_mroute_del(up->channel_oil, __PRETTY_FUNCTION__); | |
207 | upstream_channel_oil_detach(up); | |
208 | ||
209 | list_delete(up->ifchannels); | |
210 | up->ifchannels = NULL; | |
211 | ||
212 | /* | |
213 | notice that listnode_delete() can't be moved | |
214 | into pim_upstream_free() because the later is | |
215 | called by list_delete_all_node() | |
216 | */ | |
217 | if (up->parent && up->parent->sources) | |
218 | listnode_delete(up->parent->sources, up); | |
219 | up->parent = NULL; | |
220 | ||
221 | listnode_delete(pim_upstream_list, up); | |
222 | hash_release(pim_upstream_hash, up); | |
223 | ||
224 | if (notify_msdp) { | |
225 | pim_msdp_up_del(&up->sg); | |
226 | } | |
227 | ||
228 | /* Deregister addr with Zebra NHT */ | |
229 | nht_p.family = AF_INET; | |
230 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
231 | nht_p.u.prefix4 = up->upstream_addr; | |
232 | if (PIM_DEBUG_TRACE) { | |
233 | char buf[PREFIX2STR_BUFFER]; | |
234 | prefix2str(&nht_p, buf, sizeof(buf)); | |
235 | zlog_debug("%s: Deregister upstream %s addr %s with Zebra NHT", | |
236 | __PRETTY_FUNCTION__, up->sg_str, buf); | |
237 | } | |
238 | pim_delete_tracked_nexthop(&nht_p, up, NULL); | |
239 | ||
240 | pim_upstream_free(up); | |
241 | ||
242 | return NULL; | |
12e41d03 DL |
243 | } |
244 | ||
ac4d0be5 | 245 | void pim_upstream_send_join(struct pim_upstream *up) |
12e41d03 | 246 | { |
ac4d0be5 | 247 | if (PIM_DEBUG_TRACE) { |
248 | char rpf_str[PREFIX_STRLEN]; | |
249 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, | |
250 | sizeof(rpf_str)); | |
251 | zlog_debug("%s: RPF'%s=%s(%s) for Interface %s", | |
252 | __PRETTY_FUNCTION__, up->sg_str, rpf_str, | |
253 | pim_upstream_state2str(up->join_state), | |
254 | up->rpf.source_nexthop.interface->name); | |
255 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
256 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", | |
257 | __PRETTY_FUNCTION__, up->sg_str, rpf_str); | |
258 | /* warning only */ | |
259 | } | |
260 | } | |
261 | ||
262 | /* send Join(S,G) to the current upstream neighbor */ | |
263 | pim_jp_agg_single_upstream_send(&up->rpf, up, 1 /* join */); | |
12e41d03 DL |
264 | } |
265 | ||
266 | static int on_join_timer(struct thread *t) | |
267 | { | |
ac4d0be5 | 268 | struct pim_upstream *up; |
12e41d03 | 269 | |
ac4d0be5 | 270 | up = THREAD_ARG(t); |
12e41d03 | 271 | |
ac4d0be5 | 272 | up->t_join_timer = NULL; |
bb6e291f | 273 | |
ac4d0be5 | 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 | |
ac4d0be5 | 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 | |
ac4d0be5 | 288 | join_timer_start(up); |
12e41d03 | 289 | |
ac4d0be5 | 290 | return 0; |
12e41d03 DL |
291 | } |
292 | ||
982bff89 | 293 | static void join_timer_stop(struct pim_upstream *up) |
12e41d03 | 294 | { |
ac4d0be5 | 295 | struct pim_neighbor *nbr; |
982bff89 | 296 | |
ac4d0be5 | 297 | THREAD_OFF(up->t_join_timer); |
7eb90689 | 298 | |
ac4d0be5 | 299 | nbr = pim_neighbor_find(up->rpf.source_nexthop.interface, |
300 | up->rpf.rpf_addr.u.prefix4); | |
982bff89 | 301 | |
ac4d0be5 | 302 | if (nbr) |
303 | pim_jp_agg_remove_group(nbr->upstream_jp_agg, up); | |
982bff89 | 304 | |
ac4d0be5 | 305 | pim_jp_agg_upstream_verification(up, false); |
982bff89 DS |
306 | } |
307 | ||
ac4d0be5 | 308 | void join_timer_start(struct pim_upstream *up) |
982bff89 | 309 | { |
ac4d0be5 | 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_TIMER_ON(master, up->t_join_timer, on_join_timer, up, | |
329 | qpim_t_periodic); | |
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 | */ | |
ac4d0be5 | 341 | void pim_upstream_join_timer_restart(struct pim_upstream *up, |
342 | struct pim_rpf *old) | |
12e41d03 | 343 | { |
ac4d0be5 | 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 | { | |
ac4d0be5 | 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_TIMER_MSEC_ON(master, up->t_join_timer, on_join_timer, up, | |
358 | interval_msec); | |
12e41d03 DL |
359 | } |
360 | ||
361 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
ac4d0be5 | 362 | struct in_addr rpf_addr, int holdtime) |
12e41d03 | 363 | { |
ac4d0be5 | 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, | |
ac4d0be5 | 395 | struct pim_upstream *up) |
12e41d03 | 396 | { |
ac4d0be5 | 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 | { | |
ac4d0be5 | 427 | struct listnode *chnode; |
428 | struct listnode *chnextnode; | |
429 | struct pim_ifchannel *ch = NULL; | |
12e41d03 | 430 | |
ac4d0be5 | 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 | |
ac4d0be5 | 436 | } /* scan iface channel list */ |
12e41d03 DL |
437 | } |
438 | ||
439 | static void forward_off(struct pim_upstream *up) | |
440 | { | |
ac4d0be5 | 441 | struct listnode *chnode; |
442 | struct listnode *chnextnode; | |
443 | struct pim_ifchannel *ch; | |
12e41d03 | 444 | |
ac4d0be5 | 445 | /* scan per-interface (S,G) state */ |
446 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
12e41d03 | 447 | |
ac4d0be5 | 448 | pim_forward_stop(ch); |
12e41d03 | 449 | |
ac4d0be5 | 450 | } /* scan iface channel list */ |
12e41d03 DL |
451 | } |
452 | ||
ac4d0be5 | 453 | static int pim_upstream_could_register(struct pim_upstream *up) |
bb6e291f | 454 | { |
ac4d0be5 | 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 | |
ac4d0be5 | 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 | |
ac4d0be5 | 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 */ | |
ac4d0be5 | 475 | void pim_upstream_register_reevaluate(void) |
15a5dafe | 476 | { |
ac4d0be5 | 477 | struct listnode *upnode; |
478 | struct pim_upstream *up; | |
479 | ||
480 | for (ALL_LIST_ELEMENTS_RO(pim_upstream_list, upnode, up)) { | |
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 | ||
488 | if (pim_is_grp_ssm(up->sg.grp)) { | |
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, | |
497 | pim_regiface, | |
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, | |
509 | pim_regiface, | |
510 | PIM_OIF_FLAG_PROTO_PIM); | |
511 | up->reg_state = PIM_REG_JOIN; | |
512 | } | |
513 | } | |
514 | } | |
15a5dafe | 515 | } |
516 | ||
ac4d0be5 | 517 | void pim_upstream_switch(struct pim_upstream *up, |
518 | enum pim_upstream_state new_state) | |
12e41d03 | 519 | { |
ac4d0be5 | 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); | |
539 | pim_msdp_up_join_state_changed(up); | |
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( | |
546 | up, qpim_keep_alive_time); | |
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) | |
560 | pim_msdp_up_join_state_changed(up); | |
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 | |
566 | && !I_am_RP(up->sg.grp)) { | |
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 | ||
ac4d0be5 | 584 | int pim_upstream_compare(void *arg1, void *arg2) |
03417ccd | 585 | { |
ac4d0be5 | 586 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
587 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
03417ccd | 588 | |
ac4d0be5 | 589 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) |
590 | return -1; | |
03417ccd | 591 | |
ac4d0be5 | 592 | if (ntohl(up1->sg.grp.s_addr) > ntohl(up2->sg.grp.s_addr)) |
593 | return 1; | |
03417ccd | 594 | |
ac4d0be5 | 595 | if (ntohl(up1->sg.src.s_addr) < ntohl(up2->sg.src.s_addr)) |
596 | return -1; | |
03417ccd | 597 | |
ac4d0be5 | 598 | if (ntohl(up1->sg.src.s_addr) > ntohl(up2->sg.src.s_addr)) |
599 | return 1; | |
03417ccd | 600 | |
ac4d0be5 | 601 | return 0; |
03417ccd DS |
602 | } |
603 | ||
07335c8d | 604 | static struct pim_upstream * |
ac4d0be5 | 605 | pim_upstream_new(struct prefix_sg *sg, struct interface *incoming, int flags) |
12e41d03 | 606 | { |
ac4d0be5 | 607 | enum pim_rpf_result rpf_result; |
608 | struct pim_interface *pim_ifp; | |
609 | struct pim_upstream *up; | |
610 | ||
611 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); | |
612 | if (!up) { | |
613 | zlog_err("%s: PIM XCALLOC(%zu) failure", __PRETTY_FUNCTION__, | |
614 | sizeof(*up)); | |
615 | return NULL; | |
616 | } | |
617 | ||
618 | up->sg = *sg; | |
619 | pim_str_sg_set(sg, up->sg_str); | |
620 | up = hash_get(pim_upstream_hash, up, hash_alloc_intern); | |
621 | if (!pim_rp_set_upstream_addr(&up->upstream_addr, sg->src, sg->grp)) { | |
622 | if (PIM_DEBUG_TRACE) | |
623 | zlog_debug("%s: Received a (*,G) with no RP configured", | |
624 | __PRETTY_FUNCTION__); | |
625 | ||
626 | hash_release(pim_upstream_hash, up); | |
627 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
628 | return NULL; | |
629 | } | |
630 | ||
631 | up->parent = pim_upstream_find_parent(up); | |
632 | if (up->sg.src.s_addr == INADDR_ANY) { | |
633 | up->sources = list_new(); | |
634 | up->sources->cmp = pim_upstream_compare; | |
635 | } else | |
636 | up->sources = NULL; | |
637 | ||
638 | pim_upstream_find_new_children(up); | |
639 | up->flags = flags; | |
640 | up->ref_count = 1; | |
641 | up->t_join_timer = NULL; | |
642 | up->t_ka_timer = NULL; | |
643 | up->t_rs_timer = NULL; | |
644 | up->t_msdp_reg_timer = NULL; | |
645 | up->join_state = PIM_UPSTREAM_NOTJOINED; | |
646 | up->reg_state = PIM_REG_NOINFO; | |
647 | up->state_transition = pim_time_monotonic_sec(); | |
648 | up->channel_oil = NULL; | |
649 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; | |
650 | ||
651 | up->rpf.source_nexthop.interface = NULL; | |
652 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; | |
653 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = | |
654 | PIM_NET_INADDR_ANY; | |
655 | up->rpf.source_nexthop.mrib_metric_preference = | |
656 | qpim_infinite_assert_metric.metric_preference; | |
657 | up->rpf.source_nexthop.mrib_route_metric = | |
658 | qpim_infinite_assert_metric.route_metric; | |
659 | up->rpf.rpf_addr.family = AF_INET; | |
660 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
661 | ||
662 | up->ifchannels = list_new(); | |
663 | up->ifchannels->cmp = (int (*)(void *, void *))pim_ifchannel_compare; | |
664 | ||
665 | if (up->sg.src.s_addr != INADDR_ANY) | |
666 | wheel_add_item(pim_upstream_sg_wheel, up); | |
667 | ||
668 | rpf_result = pim_rpf_update(up, NULL, 1); | |
669 | if (rpf_result == PIM_RPF_FAILURE) { | |
670 | struct prefix nht_p; | |
671 | ||
672 | if (PIM_DEBUG_TRACE) | |
673 | zlog_debug( | |
674 | "%s: Attempting to create upstream(%s), Unable to RPF for source", | |
675 | __PRETTY_FUNCTION__, up->sg_str); | |
676 | ||
677 | nht_p.family = AF_INET; | |
678 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
679 | nht_p.u.prefix4 = up->upstream_addr; | |
680 | pim_delete_tracked_nexthop(&nht_p, up, NULL); | |
681 | ||
682 | if (up->parent) { | |
683 | listnode_delete(up->parent->sources, up); | |
684 | up->parent = NULL; | |
685 | } | |
686 | ||
687 | if (up->sg.src.s_addr != INADDR_ANY) | |
688 | wheel_remove_item(pim_upstream_sg_wheel, up); | |
689 | ||
690 | pim_upstream_remove_children(up); | |
691 | if (up->sources) | |
692 | list_delete(up->sources); | |
693 | ||
694 | hash_release(pim_upstream_hash, up); | |
695 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
696 | return NULL; | |
697 | } | |
698 | ||
699 | if (up->rpf.source_nexthop.interface) { | |
700 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
701 | if (pim_ifp) | |
702 | up->channel_oil = pim_channel_oil_add( | |
703 | &up->sg, pim_ifp->mroute_vif_index); | |
704 | } | |
705 | listnode_add_sort(pim_upstream_list, up); | |
706 | ||
707 | if (PIM_DEBUG_TRACE) { | |
708 | zlog_debug( | |
709 | "%s: Created Upstream %s upstream_addr %s ref count %d increment", | |
710 | __PRETTY_FUNCTION__, up->sg_str, | |
711 | inet_ntoa(up->upstream_addr), up->ref_count); | |
712 | } | |
713 | ||
714 | return up; | |
12e41d03 DL |
715 | } |
716 | ||
4ed0af70 | 717 | struct pim_upstream *pim_upstream_find(struct prefix_sg *sg) |
12e41d03 | 718 | { |
ac4d0be5 | 719 | struct pim_upstream lookup; |
720 | struct pim_upstream *up = NULL; | |
12e41d03 | 721 | |
ac4d0be5 | 722 | lookup.sg = *sg; |
723 | up = hash_lookup(pim_upstream_hash, &lookup); | |
724 | return up; | |
12e41d03 DL |
725 | } |
726 | ||
ac4d0be5 | 727 | struct pim_upstream *pim_upstream_find_or_add(struct prefix_sg *sg, |
728 | struct interface *incoming, | |
729 | int flags, const char *name) | |
e711cd3c | 730 | { |
ac4d0be5 | 731 | struct pim_upstream *up; |
732 | ||
733 | up = pim_upstream_find(sg); | |
734 | ||
735 | if (up) { | |
736 | if (!(up->flags & flags)) { | |
737 | up->flags |= flags; | |
738 | up->ref_count++; | |
739 | if (PIM_DEBUG_TRACE) | |
740 | zlog_debug( | |
741 | "%s(%s): upstream %s ref count %d increment", | |
742 | __PRETTY_FUNCTION__, name, up->sg_str, | |
743 | up->ref_count); | |
744 | } | |
745 | } else | |
746 | up = pim_upstream_add(sg, incoming, flags, name); | |
747 | ||
748 | return up; | |
e711cd3c DS |
749 | } |
750 | ||
ac4d0be5 | 751 | void pim_upstream_ref(struct pim_upstream *up, int flags, const char *name) |
1bf16443 | 752 | { |
ac4d0be5 | 753 | up->flags |= flags; |
754 | ++up->ref_count; | |
755 | if (PIM_DEBUG_TRACE) | |
756 | zlog_debug("%s(%s): upstream %s ref count %d increment", | |
757 | __PRETTY_FUNCTION__, name, up->sg_str, | |
758 | up->ref_count); | |
1bf16443 | 759 | } |
760 | ||
4ed0af70 | 761 | struct pim_upstream *pim_upstream_add(struct prefix_sg *sg, |
ac4d0be5 | 762 | struct interface *incoming, int flags, |
763 | const char *name) | |
12e41d03 | 764 | { |
ac4d0be5 | 765 | struct pim_upstream *up = NULL; |
766 | int found = 0; | |
767 | up = pim_upstream_find(sg); | |
768 | if (up) { | |
769 | pim_upstream_ref(up, flags, name); | |
770 | found = 1; | |
771 | } else { | |
772 | up = pim_upstream_new(sg, incoming, flags); | |
773 | } | |
774 | ||
775 | if (PIM_DEBUG_TRACE) { | |
776 | if (up) { | |
777 | char buf[PREFIX2STR_BUFFER]; | |
778 | prefix2str(&up->rpf.rpf_addr, buf, sizeof(buf)); | |
779 | zlog_debug("%s(%s): %s, iif %s (%s) found: %d: ref_count: %d", | |
f4075cb4 | 780 | __PRETTY_FUNCTION__, name, |
55785900 CS |
781 | up->sg_str, buf, up->rpf.source_nexthop.interface ? |
782 | up->rpf.source_nexthop.interface->name : "NIL" , | |
783 | found, up->ref_count); | |
ac4d0be5 | 784 | } else |
785 | zlog_debug("%s(%s): (%s) failure to create", | |
786 | __PRETTY_FUNCTION__, name, | |
787 | pim_str_sg_dump(sg)); | |
788 | } | |
12e41d03 | 789 | |
ac4d0be5 | 790 | return up; |
12e41d03 DL |
791 | } |
792 | ||
c8fc07cb DS |
793 | /* |
794 | * Passed in up must be the upstream for ch. starch is NULL if no | |
795 | * information | |
796 | */ | |
ac4d0be5 | 797 | int pim_upstream_evaluate_join_desired_interface(struct pim_upstream *up, |
798 | struct pim_ifchannel *ch, | |
799 | struct pim_ifchannel *starch) | |
7a3ddda5 | 800 | { |
ac4d0be5 | 801 | if (ch) { |
802 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
803 | return 0; | |
804 | ||
805 | if (!pim_macro_ch_lost_assert(ch) | |
806 | && pim_macro_chisin_joins_or_include(ch)) | |
807 | return 1; | |
808 | } | |
809 | ||
810 | /* | |
811 | * joins (*,G) | |
812 | */ | |
813 | if (starch) { | |
814 | if (PIM_IF_FLAG_TEST_S_G_RPT(starch->upstream->flags)) | |
815 | return 0; | |
816 | ||
817 | if (!pim_macro_ch_lost_assert(starch) | |
818 | && pim_macro_chisin_joins_or_include(starch)) | |
819 | return 1; | |
820 | } | |
821 | ||
822 | return 0; | |
7a3ddda5 DS |
823 | } |
824 | ||
12e41d03 DL |
825 | /* |
826 | Evaluate JoinDesired(S,G): | |
827 | ||
828 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
829 | in the set: | |
830 | ||
831 | inherited_olist(S,G) = | |
832 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
833 | ||
834 | JoinDesired(S,G) may be affected by changes in the following: | |
835 | ||
836 | pim_ifp->primary_address | |
837 | pim_ifp->pim_dr_addr | |
838 | ch->ifassert_winner_metric | |
839 | ch->ifassert_winner | |
ac4d0be5 | 840 | ch->local_ifmembership |
12e41d03 DL |
841 | ch->ifjoin_state |
842 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
843 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
844 | ch->upstream->rpf.source_nexthop.interface | |
845 | ||
846 | See also pim_upstream_update_join_desired() below. | |
847 | */ | |
848 | int pim_upstream_evaluate_join_desired(struct pim_upstream *up) | |
849 | { | |
ac4d0be5 | 850 | struct interface *ifp; |
851 | struct listnode *node; | |
852 | struct pim_ifchannel *ch, *starch; | |
853 | struct pim_upstream *starup = up->parent; | |
854 | int ret = 0; | |
12e41d03 | 855 | |
ac4d0be5 | 856 | for (ALL_LIST_ELEMENTS_RO(vrf_iflist(VRF_DEFAULT), node, ifp)) { |
857 | if (!ifp->info) | |
858 | continue; | |
c8fc07cb | 859 | |
ac4d0be5 | 860 | ch = pim_ifchannel_find(ifp, &up->sg); |
c8fc07cb | 861 | |
ac4d0be5 | 862 | if (starup) |
863 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
864 | else | |
865 | starch = NULL; | |
c8fc07cb | 866 | |
ac4d0be5 | 867 | if (!ch && !starch) |
868 | continue; | |
12e41d03 | 869 | |
ac4d0be5 | 870 | ret += pim_upstream_evaluate_join_desired_interface(up, ch, |
871 | starch); | |
872 | } /* scan iface channel list */ | |
12e41d03 | 873 | |
ac4d0be5 | 874 | return ret; /* false */ |
12e41d03 DL |
875 | } |
876 | ||
877 | /* | |
878 | See also pim_upstream_evaluate_join_desired() above. | |
879 | */ | |
880 | void pim_upstream_update_join_desired(struct pim_upstream *up) | |
881 | { | |
ac4d0be5 | 882 | int was_join_desired; /* boolean */ |
883 | int is_join_desired; /* boolean */ | |
884 | ||
885 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
886 | ||
887 | is_join_desired = pim_upstream_evaluate_join_desired(up); | |
888 | if (is_join_desired) | |
889 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
890 | else | |
891 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
892 | ||
893 | /* switched from false to true */ | |
894 | if (is_join_desired && !was_join_desired) { | |
895 | pim_upstream_switch(up, PIM_UPSTREAM_JOINED); | |
896 | return; | |
897 | } | |
898 | ||
899 | /* switched from true to false */ | |
900 | if (!is_join_desired && was_join_desired) { | |
901 | pim_upstream_switch(up, PIM_UPSTREAM_NOTJOINED); | |
902 | return; | |
903 | } | |
12e41d03 DL |
904 | } |
905 | ||
906 | /* | |
907 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
908 | Transitions from Joined State | |
909 | RPF'(S,G) GenID changes | |
910 | ||
911 | The upstream (S,G) state machine remains in Joined state. If the | |
912 | Join Timer is set to expire in more than t_override seconds, reset | |
913 | it so that it expires after t_override seconds. | |
914 | */ | |
915 | void pim_upstream_rpf_genid_changed(struct in_addr neigh_addr) | |
916 | { | |
ac4d0be5 | 917 | struct listnode *up_node; |
918 | struct listnode *up_nextnode; | |
919 | struct pim_upstream *up; | |
920 | ||
921 | /* | |
922 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
923 | */ | |
924 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) { | |
925 | ||
926 | if (PIM_DEBUG_TRACE) { | |
927 | char neigh_str[INET_ADDRSTRLEN]; | |
928 | char rpf_addr_str[PREFIX_STRLEN]; | |
929 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, | |
930 | sizeof(neigh_str)); | |
931 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, | |
932 | sizeof(rpf_addr_str)); | |
933 | zlog_debug( | |
934 | "%s: matching neigh=%s against upstream (S,G)=%s joined=%d rpf_addr=%s", | |
935 | __PRETTY_FUNCTION__, neigh_str, up->sg_str, | |
936 | up->join_state == PIM_UPSTREAM_JOINED, | |
937 | rpf_addr_str); | |
938 | } | |
939 | ||
940 | /* consider only (S,G) upstream in Joined state */ | |
941 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
942 | continue; | |
943 | ||
944 | /* match RPF'(S,G)=neigh_addr */ | |
945 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) | |
946 | continue; | |
947 | ||
948 | pim_upstream_join_timer_decrease_to_t_override( | |
949 | "RPF'(S,G) GenID change", up); | |
950 | } | |
12e41d03 DL |
951 | } |
952 | ||
953 | ||
954 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
955 | struct interface *old_rpf_ifp) | |
956 | { | |
ac4d0be5 | 957 | struct listnode *chnode; |
958 | struct listnode *chnextnode; | |
959 | struct pim_ifchannel *ch; | |
960 | ||
961 | /* search all ifchannels */ | |
962 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
963 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
964 | if ( | |
965 | /* RPF_interface(S) was NOT I */ | |
966 | (old_rpf_ifp == ch->interface) && | |
967 | /* RPF_interface(S) stopped being I */ | |
968 | (ch->upstream->rpf.source_nexthop | |
969 | .interface != ch->interface)) { | |
970 | assert_action_a5(ch); | |
971 | } | |
972 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
973 | ||
974 | pim_ifchannel_update_assert_tracking_desired(ch); | |
975 | } | |
12e41d03 DL |
976 | } |
977 | ||
978 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
979 | { | |
ac4d0be5 | 980 | struct listnode *chnode; |
981 | struct listnode *chnextnode; | |
982 | struct pim_ifchannel *ch; | |
983 | ||
984 | /* scan per-interface (S,G) state */ | |
985 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
986 | pim_ifchannel_update_could_assert(ch); | |
987 | } /* scan iface channel list */ | |
12e41d03 DL |
988 | } |
989 | ||
990 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
991 | { | |
ac4d0be5 | 992 | struct listnode *chnode; |
993 | struct listnode *chnextnode; | |
994 | struct pim_ifchannel *ch; | |
12e41d03 | 995 | |
ac4d0be5 | 996 | /* scan per-interface (S,G) state */ |
997 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
998 | pim_ifchannel_update_my_assert_metric(ch); | |
12e41d03 | 999 | |
ac4d0be5 | 1000 | } /* scan iface channel list */ |
12e41d03 DL |
1001 | } |
1002 | ||
1003 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
1004 | { | |
ac4d0be5 | 1005 | struct listnode *chnode; |
1006 | struct listnode *chnextnode; | |
1007 | struct pim_interface *pim_ifp; | |
1008 | struct pim_ifchannel *ch; | |
1009 | ||
1010 | /* scan per-interface (S,G) state */ | |
1011 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { | |
1012 | if (!ch->interface) | |
1013 | continue; | |
1014 | pim_ifp = ch->interface->info; | |
1015 | if (!pim_ifp) | |
1016 | continue; | |
1017 | ||
1018 | pim_ifchannel_update_assert_tracking_desired(ch); | |
1019 | ||
1020 | } /* scan iface channel list */ | |
12e41d03 | 1021 | } |
f14248dd | 1022 | |
1bf16443 | 1023 | /* When kat is stopped CouldRegister goes to false so we need to |
1024 | * transition the (S, G) on FHR to NI state and remove reg tunnel | |
1025 | * from the OIL */ | |
1026 | static void pim_upstream_fhr_kat_expiry(struct pim_upstream *up) | |
1027 | { | |
ac4d0be5 | 1028 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
1029 | return; | |
1030 | ||
1031 | if (PIM_DEBUG_TRACE) | |
1032 | zlog_debug("kat expired on %s; clear fhr reg state", | |
1033 | up->sg_str); | |
1034 | ||
1035 | /* stop reg-stop timer */ | |
1036 | THREAD_OFF(up->t_rs_timer); | |
1037 | /* remove regiface from the OIL if it is there*/ | |
1038 | pim_channel_del_oif(up->channel_oil, pim_regiface, | |
1039 | PIM_OIF_FLAG_PROTO_PIM); | |
1040 | /* clear the register state */ | |
1041 | up->reg_state = PIM_REG_NOINFO; | |
1042 | PIM_UPSTREAM_FLAG_UNSET_FHR(up->flags); | |
1bf16443 | 1043 | } |
1044 | ||
1045 | /* When kat is started CouldRegister can go to true. And if it does we | |
1046 | * need to transition the (S, G) on FHR to JOINED state and add reg tunnel | |
1047 | * to the OIL */ | |
1048 | static void pim_upstream_fhr_kat_start(struct pim_upstream *up) | |
1049 | { | |
ac4d0be5 | 1050 | if (pim_upstream_could_register(up)) { |
1051 | if (PIM_DEBUG_TRACE) | |
1052 | zlog_debug( | |
1053 | "kat started on %s; set fhr reg state to joined", | |
1054 | up->sg_str); | |
1055 | ||
1056 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); | |
1057 | if (up->reg_state == PIM_REG_NOINFO) | |
1058 | pim_register_join(up); | |
1059 | } | |
1bf16443 | 1060 | } |
1061 | ||
f14248dd DS |
1062 | /* |
1063 | * On an RP, the PMBR value must be cleared when the | |
1064 | * Keepalive Timer expires | |
1bf16443 | 1065 | * KAT expiry indicates that flow is inactive. If the flow was created or |
1066 | * maintained by activity now is the time to deref it. | |
f14248dd | 1067 | */ |
ac4d0be5 | 1068 | static int pim_upstream_keep_alive_timer(struct thread *t) |
f14248dd | 1069 | { |
ac4d0be5 | 1070 | struct pim_upstream *up; |
1071 | ||
1072 | up = THREAD_ARG(t); | |
1073 | up->t_ka_timer = NULL; | |
1074 | ||
1075 | if (I_am_RP(up->sg.grp)) { | |
1076 | pim_br_clear_pmbr(&up->sg); | |
1077 | /* | |
1078 | * We need to do more here :) | |
1079 | * But this is the start. | |
1080 | */ | |
1081 | } | |
1082 | ||
1083 | /* source is no longer active - pull the SA from MSDP's cache */ | |
1084 | pim_msdp_sa_local_del(&up->sg); | |
1085 | ||
1086 | /* if entry was created because of activity we need to deref it */ | |
1087 | if (PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
1088 | pim_upstream_fhr_kat_expiry(up); | |
1089 | if (PIM_DEBUG_TRACE) | |
1090 | zlog_debug("kat expired on %s; remove stream reference", | |
1091 | up->sg_str); | |
1092 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(up->flags); | |
1093 | pim_upstream_del(up, __PRETTY_FUNCTION__); | |
1094 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) { | |
1095 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(up->flags); | |
1096 | pim_upstream_del(up, __PRETTY_FUNCTION__); | |
1097 | } | |
1098 | ||
1099 | return 0; | |
f14248dd DS |
1100 | } |
1101 | ||
ac4d0be5 | 1102 | void pim_upstream_keep_alive_timer_start(struct pim_upstream *up, uint32_t time) |
f14248dd | 1103 | { |
ac4d0be5 | 1104 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { |
1105 | if (PIM_DEBUG_TRACE) | |
1106 | zlog_debug("kat start on %s with no stream reference", | |
1107 | up->sg_str); | |
1108 | } | |
1109 | THREAD_OFF(up->t_ka_timer); | |
1110 | THREAD_TIMER_ON(master, up->t_ka_timer, pim_upstream_keep_alive_timer, | |
1111 | up, time); | |
1112 | ||
1113 | /* any time keepalive is started against a SG we will have to | |
1114 | * re-evaluate our active source database */ | |
1115 | pim_msdp_sa_local_update(up); | |
1bf16443 | 1116 | } |
1117 | ||
1118 | /* MSDP on RP needs to know if a source is registerable to this RP */ | |
ac4d0be5 | 1119 | static int pim_upstream_msdp_reg_timer(struct thread *t) |
1bf16443 | 1120 | { |
ac4d0be5 | 1121 | struct pim_upstream *up; |
1bf16443 | 1122 | |
ac4d0be5 | 1123 | up = THREAD_ARG(t); |
1124 | up->t_msdp_reg_timer = NULL; | |
1bf16443 | 1125 | |
ac4d0be5 | 1126 | /* source is no longer active - pull the SA from MSDP's cache */ |
1127 | pim_msdp_sa_local_del(&up->sg); | |
1128 | return 1; | |
1bf16443 | 1129 | } |
ac4d0be5 | 1130 | void pim_upstream_msdp_reg_timer_start(struct pim_upstream *up) |
1bf16443 | 1131 | { |
ac4d0be5 | 1132 | THREAD_OFF(up->t_msdp_reg_timer); |
1133 | THREAD_TIMER_ON(master, up->t_msdp_reg_timer, | |
1134 | pim_upstream_msdp_reg_timer, up, | |
1135 | PIM_MSDP_REG_RXED_PERIOD); | |
1bf16443 | 1136 | |
ac4d0be5 | 1137 | pim_msdp_sa_local_update(up); |
f14248dd | 1138 | } |
cb40b272 DS |
1139 | |
1140 | /* | |
1141 | * 4.2.1 Last-Hop Switchover to the SPT | |
1142 | * | |
1143 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
1144 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
1145 | * router, it has the option of switching to receive the traffic on a | |
1146 | * shortest path tree (SPT). | |
1147 | * | |
1148 | * The decision for a router to switch to the SPT is controlled as | |
1149 | * follows: | |
1150 | * | |
1151 | * void | |
1152 | * CheckSwitchToSpt(S,G) { | |
1153 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
1154 | * (+) pim_include(S,G) != NULL ) | |
1155 | * AND SwitchToSptDesired(S,G) ) { | |
1156 | * # Note: Restarting the KAT will result in the SPT switch | |
1157 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1158 | * } | |
1159 | * } | |
1160 | * | |
1161 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
1162 | * defined. An "infinite threshold" policy can be implemented by making | |
1163 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
1164 | * first packet" policy can be implemented by making | |
1165 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
1166 | * received for the source and group. | |
1167 | */ | |
ac4d0be5 | 1168 | int pim_upstream_switch_to_spt_desired(struct prefix_sg *sg) |
cb40b272 | 1169 | { |
ac4d0be5 | 1170 | if (I_am_RP(sg->grp)) |
1171 | return 1; | |
a3b58b4a | 1172 | |
ac4d0be5 | 1173 | return 0; |
cb40b272 | 1174 | } |
d7259eac | 1175 | |
ac4d0be5 | 1176 | int pim_upstream_is_sg_rpt(struct pim_upstream *up) |
80d9c3a0 | 1177 | { |
ac4d0be5 | 1178 | struct listnode *chnode; |
1179 | struct pim_ifchannel *ch; | |
f21597f0 | 1180 | |
ac4d0be5 | 1181 | for (ALL_LIST_ELEMENTS_RO(up->ifchannels, chnode, ch)) { |
1182 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
1183 | return 1; | |
1184 | } | |
e43b8697 | 1185 | |
ac4d0be5 | 1186 | return 0; |
80d9c3a0 | 1187 | } |
3a66b17b DS |
1188 | /* |
1189 | * After receiving a packet set SPTbit: | |
1190 | * void | |
1191 | * Update_SPTbit(S,G,iif) { | |
1192 | * if ( iif == RPF_interface(S) | |
1193 | * AND JoinDesired(S,G) == TRUE | |
1194 | * AND ( DirectlyConnected(S) == TRUE | |
1195 | * OR RPF_interface(S) != RPF_interface(RP(G)) | |
1196 | * OR inherited_olist(S,G,rpt) == NULL | |
1197 | * OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1198 | * ( RPF'(S,G) != NULL ) ) | |
1199 | * OR ( I_Am_Assert_Loser(S,G,iif) ) { | |
1200 | * Set SPTbit(S,G) to TRUE | |
1201 | * } | |
1202 | * } | |
1203 | */ | |
ac4d0be5 | 1204 | void pim_upstream_set_sptbit(struct pim_upstream *up, |
1205 | struct interface *incoming) | |
3a66b17b | 1206 | { |
ac4d0be5 | 1207 | struct pim_upstream *starup = up->parent; |
1208 | ||
1209 | // iif == RPF_interfvace(S) | |
1210 | if (up->rpf.source_nexthop.interface != incoming) { | |
1211 | if (PIM_DEBUG_TRACE) | |
1212 | zlog_debug( | |
1213 | "%s: Incoming Interface: %s is different than RPF_interface(S) %s", | |
1214 | __PRETTY_FUNCTION__, incoming->name, | |
1215 | up->rpf.source_nexthop.interface->name); | |
1216 | return; | |
1217 | } | |
1218 | ||
1219 | // AND JoinDesired(S,G) == TRUE | |
1220 | // FIXME | |
1221 | ||
1222 | // DirectlyConnected(S) == TRUE | |
1223 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1224 | up->sg.src)) { | |
1225 | if (PIM_DEBUG_TRACE) | |
1226 | zlog_debug("%s: %s is directly connected to the source", | |
1227 | __PRETTY_FUNCTION__, up->sg_str); | |
1228 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1229 | return; | |
1230 | } | |
1231 | ||
1232 | // OR RPF_interface(S) != RPF_interface(RP(G)) | |
1233 | if (!starup | |
1234 | || up->rpf.source_nexthop | |
1235 | .interface != starup->rpf.source_nexthop.interface) { | |
1236 | if (PIM_DEBUG_TRACE) | |
1237 | zlog_debug( | |
1238 | "%s: %s RPF_interface(S) != RPF_interface(RP(G))", | |
1239 | __PRETTY_FUNCTION__, up->sg_str); | |
1240 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1241 | return; | |
1242 | } | |
1243 | ||
1244 | // OR inherited_olist(S,G,rpt) == NULL | |
1245 | if (pim_upstream_is_sg_rpt(up) | |
1246 | && pim_upstream_empty_inherited_olist(up)) { | |
1247 | if (PIM_DEBUG_TRACE) | |
1248 | zlog_debug("%s: %s OR inherited_olist(S,G,rpt) == NULL", | |
1249 | __PRETTY_FUNCTION__, up->sg_str); | |
1250 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1251 | return; | |
1252 | } | |
1253 | ||
1254 | // OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1255 | // ( RPF'(S,G) != NULL ) ) | |
1256 | if (up->parent && pim_rpf_is_same(&up->rpf, &up->parent->rpf)) { | |
1257 | if (PIM_DEBUG_TRACE) | |
1258 | zlog_debug("%s: %s RPF'(S,G) is the same as RPF'(*,G)", | |
1259 | __PRETTY_FUNCTION__, up->sg_str); | |
1260 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1261 | return; | |
1262 | } | |
1263 | ||
1264 | return; | |
3a66b17b | 1265 | } |
80d9c3a0 | 1266 | |
ac4d0be5 | 1267 | const char *pim_upstream_state2str(enum pim_upstream_state join_state) |
d7259eac | 1268 | { |
ac4d0be5 | 1269 | switch (join_state) { |
1270 | case PIM_UPSTREAM_NOTJOINED: | |
1271 | return "NotJoined"; | |
1272 | break; | |
1273 | case PIM_UPSTREAM_JOINED: | |
1274 | return "Joined"; | |
1275 | break; | |
1276 | } | |
1277 | return "Unknown"; | |
d7259eac | 1278 | } |
627ed2a3 | 1279 | |
ac4d0be5 | 1280 | const char *pim_reg_state2str(enum pim_reg_state reg_state, char *state_str) |
e0e127b0 | 1281 | { |
ac4d0be5 | 1282 | switch (reg_state) { |
1283 | case PIM_REG_NOINFO: | |
1284 | strcpy(state_str, "RegNoInfo"); | |
1285 | break; | |
1286 | case PIM_REG_JOIN: | |
1287 | strcpy(state_str, "RegJoined"); | |
1288 | break; | |
1289 | case PIM_REG_JOIN_PENDING: | |
1290 | strcpy(state_str, "RegJoinPend"); | |
1291 | break; | |
1292 | case PIM_REG_PRUNE: | |
1293 | strcpy(state_str, "RegPrune"); | |
1294 | break; | |
1295 | default: | |
1296 | strcpy(state_str, "RegUnknown"); | |
1297 | } | |
1298 | return state_str; | |
e0e127b0 | 1299 | } |
1300 | ||
ac4d0be5 | 1301 | static int pim_upstream_register_stop_timer(struct thread *t) |
627ed2a3 | 1302 | { |
ac4d0be5 | 1303 | struct pim_interface *pim_ifp; |
1304 | struct pim_upstream *up; | |
1305 | struct pim_rpf *rpg; | |
1306 | struct ip ip_hdr; | |
1307 | up = THREAD_ARG(t); | |
1308 | ||
1309 | up->t_rs_timer = NULL; | |
1310 | ||
1311 | if (PIM_DEBUG_TRACE) { | |
1312 | char state_str[PIM_REG_STATE_STR_LEN]; | |
1313 | zlog_debug("%s: (S,G)=%s upstream register stop timer %s", | |
1314 | __PRETTY_FUNCTION__, up->sg_str, | |
1315 | pim_reg_state2str(up->reg_state, state_str)); | |
70e7fda8 | 1316 | } |
ac4d0be5 | 1317 | |
1318 | switch (up->reg_state) { | |
1319 | case PIM_REG_JOIN_PENDING: | |
1320 | up->reg_state = PIM_REG_JOIN; | |
1321 | pim_channel_add_oif(up->channel_oil, pim_regiface, | |
1322 | PIM_OIF_FLAG_PROTO_PIM); | |
1323 | break; | |
1324 | case PIM_REG_JOIN: | |
1325 | break; | |
1326 | case PIM_REG_PRUNE: | |
1327 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
1328 | if (!pim_ifp) { | |
1329 | if (PIM_DEBUG_TRACE) | |
1330 | zlog_debug( | |
1331 | "%s: Interface: %s is not configured for pim", | |
1332 | __PRETTY_FUNCTION__, | |
1333 | up->rpf.source_nexthop.interface->name); | |
1334 | return 0; | |
1335 | } | |
1336 | up->reg_state = PIM_REG_JOIN_PENDING; | |
1337 | pim_upstream_start_register_stop_timer(up, 1); | |
1338 | ||
1339 | if (((up->channel_oil->cc.lastused / 100) | |
1340 | > PIM_KEEPALIVE_PERIOD) | |
1341 | && (I_am_RP(up->sg.grp))) { | |
1342 | if (PIM_DEBUG_TRACE) | |
1343 | zlog_debug( | |
1344 | "%s: Stop sending the register, because I am the RP and we haven't seen a packet in a while", | |
1345 | __PRETTY_FUNCTION__); | |
1346 | return 0; | |
1347 | } | |
1348 | rpg = RP(up->sg.grp); | |
1349 | memset(&ip_hdr, 0, sizeof(struct ip)); | |
1350 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
1351 | ip_hdr.ip_hl = 5; | |
1352 | ip_hdr.ip_v = 4; | |
1353 | ip_hdr.ip_src = up->sg.src; | |
1354 | ip_hdr.ip_dst = up->sg.grp; | |
1355 | ip_hdr.ip_len = htons(20); | |
1356 | // checksum is broken | |
1357 | pim_register_send((uint8_t *)&ip_hdr, sizeof(struct ip), | |
1358 | pim_ifp->primary_address, rpg, 1, up); | |
1359 | break; | |
1360 | default: | |
1361 | break; | |
1362 | } | |
1363 | ||
1364 | return 0; | |
627ed2a3 DS |
1365 | } |
1366 | ||
ac4d0be5 | 1367 | void pim_upstream_start_register_stop_timer(struct pim_upstream *up, |
1368 | int null_register) | |
627ed2a3 | 1369 | { |
ac4d0be5 | 1370 | uint32_t time; |
1371 | ||
1372 | if (up->t_rs_timer) { | |
1373 | THREAD_TIMER_OFF(up->t_rs_timer); | |
1374 | up->t_rs_timer = NULL; | |
1375 | } | |
1376 | ||
1377 | if (!null_register) { | |
1378 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1379 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1380 | time = lower + (random() % (upper - lower + 1)) | |
1381 | - PIM_REGISTER_PROBE_PERIOD; | |
1382 | } else | |
1383 | time = PIM_REGISTER_PROBE_PERIOD; | |
1384 | ||
1385 | if (PIM_DEBUG_TRACE) { | |
1386 | zlog_debug( | |
1387 | "%s: (S,G)=%s Starting upstream register stop timer %d", | |
1388 | __PRETTY_FUNCTION__, up->sg_str, time); | |
1389 | } | |
1390 | THREAD_TIMER_ON(master, up->t_rs_timer, | |
1391 | pim_upstream_register_stop_timer, up, time); | |
627ed2a3 | 1392 | } |
4fdc8f36 | 1393 | |
ac4d0be5 | 1394 | int pim_upstream_inherited_olist_decide(struct pim_upstream *up) |
4fdc8f36 | 1395 | { |
ac4d0be5 | 1396 | struct interface *ifp; |
1397 | struct pim_interface *pim_ifp = NULL; | |
1398 | struct pim_ifchannel *ch, *starch; | |
1399 | struct listnode *node; | |
1400 | struct pim_upstream *starup = up->parent; | |
1401 | int output_intf = 0; | |
1402 | ||
1403 | if (up->rpf.source_nexthop.interface) | |
1404 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
1405 | else { | |
1406 | if (PIM_DEBUG_TRACE) | |
1407 | zlog_debug("%s: up %s RPF is not present", | |
1408 | __PRETTY_FUNCTION__, up->sg_str); | |
1409 | } | |
1410 | if (pim_ifp && !up->channel_oil) | |
1411 | up->channel_oil = | |
1412 | pim_channel_oil_add(&up->sg, pim_ifp->mroute_vif_index); | |
1413 | ||
1414 | for (ALL_LIST_ELEMENTS_RO(vrf_iflist(VRF_DEFAULT), node, ifp)) { | |
1415 | if (!ifp->info) | |
1416 | continue; | |
1417 | ||
1418 | ch = pim_ifchannel_find(ifp, &up->sg); | |
1419 | ||
1420 | if (starup) | |
1421 | starch = pim_ifchannel_find(ifp, &starup->sg); | |
1422 | else | |
1423 | starch = NULL; | |
1424 | ||
1425 | if (!ch && !starch) | |
1426 | continue; | |
1427 | ||
1428 | if (pim_upstream_evaluate_join_desired_interface(up, ch, | |
1429 | starch)) { | |
1430 | int flag = PIM_OIF_FLAG_PROTO_PIM; | |
1431 | ||
1432 | if (!ch) | |
1433 | flag = PIM_OIF_FLAG_PROTO_STAR; | |
1434 | ||
1435 | pim_channel_add_oif(up->channel_oil, ifp, flag); | |
1436 | output_intf++; | |
1437 | } | |
1438 | } | |
1439 | ||
1440 | return output_intf; | |
b5183fd1 DS |
1441 | } |
1442 | ||
1443 | /* | |
1444 | * For a given upstream, determine the inherited_olist | |
1445 | * and apply it. | |
1446 | * | |
1447 | * inherited_olist(S,G,rpt) = | |
1448 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1449 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1450 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1451 | * | |
1452 | * inherited_olist(S,G) = | |
1453 | * inherited_olist(S,G,rpt) (+) | |
1454 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1455 | * | |
1456 | * return 1 if there are any output interfaces | |
1457 | * return 0 if there are not any output interfaces | |
1458 | */ | |
ac4d0be5 | 1459 | int pim_upstream_inherited_olist(struct pim_upstream *up) |
b5183fd1 | 1460 | { |
ac4d0be5 | 1461 | int output_intf = pim_upstream_inherited_olist_decide(up); |
1462 | ||
1463 | /* | |
1464 | * If we have output_intf switch state to Join and work like normal | |
1465 | * If we don't have an output_intf that means we are probably a | |
1466 | * switch on a stick so turn on forwarding to just accept the | |
1467 | * incoming packets so we don't bother the other stuff! | |
1468 | */ | |
1469 | if (output_intf) | |
1470 | pim_upstream_switch(up, PIM_UPSTREAM_JOINED); | |
1471 | else | |
1472 | forward_on(up); | |
1473 | ||
1474 | return output_intf; | |
4fdc8f36 | 1475 | } |
d3dd1804 | 1476 | |
ac4d0be5 | 1477 | int pim_upstream_empty_inherited_olist(struct pim_upstream *up) |
80d9c3a0 | 1478 | { |
ac4d0be5 | 1479 | return pim_channel_oil_empty(up->channel_oil); |
80d9c3a0 DS |
1480 | } |
1481 | ||
d3dd1804 DS |
1482 | /* |
1483 | * When we have a new neighbor, | |
1484 | * find upstreams that don't have their rpf_addr | |
1485 | * set and see if the new neighbor allows | |
1486 | * the join to be sent | |
1487 | */ | |
ac4d0be5 | 1488 | void pim_upstream_find_new_rpf(void) |
d3dd1804 | 1489 | { |
ac4d0be5 | 1490 | struct listnode *up_node; |
1491 | struct listnode *up_nextnode; | |
1492 | struct pim_upstream *up; | |
1493 | ||
1494 | /* | |
1495 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
1496 | */ | |
1497 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) { | |
1498 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
1499 | if (PIM_DEBUG_TRACE) | |
1500 | zlog_debug( | |
1501 | "Upstream %s without a path to send join, checking", | |
1502 | up->sg_str); | |
1503 | pim_rpf_update(up, NULL, 1); | |
1504 | } | |
d3dd1804 | 1505 | } |
d3dd1804 | 1506 | } |
0f588989 | 1507 | |
ac4d0be5 | 1508 | static unsigned int pim_upstream_hash_key(void *arg) |
0f588989 | 1509 | { |
ac4d0be5 | 1510 | struct pim_upstream *up = (struct pim_upstream *)arg; |
0f588989 | 1511 | |
ac4d0be5 | 1512 | return jhash_2words(up->sg.src.s_addr, up->sg.grp.s_addr, 0); |
0f588989 DS |
1513 | } |
1514 | ||
ac4d0be5 | 1515 | void pim_upstream_terminate(void) |
0f588989 | 1516 | { |
ac4d0be5 | 1517 | if (pim_upstream_list) |
1518 | list_delete(pim_upstream_list); | |
1519 | pim_upstream_list = NULL; | |
0f588989 | 1520 | |
ac4d0be5 | 1521 | if (pim_upstream_hash) |
1522 | hash_free(pim_upstream_hash); | |
1523 | pim_upstream_hash = NULL; | |
0f588989 DS |
1524 | } |
1525 | ||
ac4d0be5 | 1526 | static int pim_upstream_equal(const void *arg1, const void *arg2) |
0f588989 | 1527 | { |
ac4d0be5 | 1528 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; |
1529 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
0f588989 | 1530 | |
ac4d0be5 | 1531 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) |
1532 | && (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
1533 | return 1; | |
0f588989 | 1534 | |
ac4d0be5 | 1535 | return 0; |
0f588989 DS |
1536 | } |
1537 | ||
1bf16443 | 1538 | /* rfc4601:section-4.2:"Data Packet Forwarding Rules" defines |
1539 | * the cases where kat has to be restarted on rxing traffic - | |
1540 | * | |
1541 | * if( DirectlyConnected(S) == TRUE AND iif == RPF_interface(S) ) { | |
1542 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1543 | * # Note: a register state transition or UpstreamJPState(S,G) | |
1544 | * # transition may happen as a result of restarting | |
1545 | * # KeepaliveTimer, and must be dealt with here. | |
1546 | * } | |
1547 | * if( iif == RPF_interface(S) AND UpstreamJPState(S,G) == Joined AND | |
1548 | * inherited_olist(S,G) != NULL ) { | |
1549 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1550 | * } | |
1551 | */ | |
1552 | static bool pim_upstream_kat_start_ok(struct pim_upstream *up) | |
1553 | { | |
ac4d0be5 | 1554 | /* "iif == RPF_interface(S)" check has to be done by the kernel or hw |
1555 | * so we will skip that here */ | |
1556 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1557 | up->sg.src)) { | |
1558 | return true; | |
1559 | } | |
1560 | ||
1561 | if ((up->join_state == PIM_UPSTREAM_JOINED) | |
1562 | && !pim_upstream_empty_inherited_olist(up)) { | |
1563 | /* XXX: I have added this RP check just for 3.2 and it's a | |
1564 | * digression from | |
1565 | * what rfc-4601 says. Till now we were only running KAT on FHR | |
1566 | * and RP and | |
1567 | * there is some angst around making the change to run it all | |
1568 | * routers that | |
1569 | * maintain the (S, G) state. This is tracked via CM-13601 and | |
1570 | * MUST be | |
1571 | * removed to handle spt turn-arounds correctly in a 3-tier clos | |
1572 | */ | |
1573 | if (I_am_RP(up->sg.grp)) | |
1574 | return true; | |
1575 | } | |
1576 | ||
1577 | return false; | |
1bf16443 | 1578 | } |
1579 | ||
9c5e4d62 DS |
1580 | /* |
1581 | * Code to check and see if we've received packets on a S,G mroute | |
1582 | * and if so to set the SPT bit appropriately | |
1583 | */ | |
ac4d0be5 | 1584 | static void pim_upstream_sg_running(void *arg) |
9c5e4d62 | 1585 | { |
ac4d0be5 | 1586 | struct pim_upstream *up = (struct pim_upstream *)arg; |
1587 | ||
1588 | // No packet can have arrived here if this is the case | |
1589 | if (!up->channel_oil || !up->channel_oil->installed) { | |
1590 | if (PIM_DEBUG_TRACE) | |
1591 | zlog_debug("%s: %s is not installed in mroute", | |
1592 | __PRETTY_FUNCTION__, up->sg_str); | |
1593 | return; | |
1594 | } | |
1595 | ||
1596 | /* | |
1597 | * This is a bit of a hack | |
1598 | * We've noted that we should rescan but | |
1599 | * we've missed the window for doing so in | |
1600 | * pim_zebra.c for some reason. I am | |
1601 | * only doing this at this point in time | |
1602 | * to get us up and working for the moment | |
1603 | */ | |
1604 | if (up->channel_oil->oil_inherited_rescan) { | |
1605 | if (PIM_DEBUG_TRACE) | |
1606 | zlog_debug( | |
1607 | "%s: Handling unscanned inherited_olist for %s", | |
1608 | __PRETTY_FUNCTION__, up->sg_str); | |
1609 | pim_upstream_inherited_olist_decide(up); | |
1610 | up->channel_oil->oil_inherited_rescan = 0; | |
1611 | } | |
1612 | pim_mroute_update_counters(up->channel_oil); | |
1613 | ||
1614 | // Have we seen packets? | |
1615 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) | |
1616 | && (up->channel_oil->cc.lastused / 100 > 30)) { | |
1617 | if (PIM_DEBUG_TRACE) { | |
1618 | zlog_debug( | |
1619 | "%s: %s old packet count is equal or lastused is greater than 30, (%ld,%ld,%lld)", | |
1620 | __PRETTY_FUNCTION__, up->sg_str, | |
1621 | up->channel_oil->cc.oldpktcnt, | |
1622 | up->channel_oil->cc.pktcnt, | |
1623 | up->channel_oil->cc.lastused / 100); | |
1624 | } | |
1625 | return; | |
e43b8697 | 1626 | } |
ac4d0be5 | 1627 | |
1628 | if (pim_upstream_kat_start_ok(up)) { | |
1629 | /* Add a source reference to the stream if | |
1630 | * one doesn't already exist */ | |
1631 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { | |
1632 | if (PIM_DEBUG_TRACE) | |
1633 | zlog_debug( | |
1634 | "source reference created on kat restart %s", | |
1635 | up->sg_str); | |
1636 | ||
1637 | pim_upstream_ref(up, PIM_UPSTREAM_FLAG_MASK_SRC_STREAM, | |
1638 | __PRETTY_FUNCTION__); | |
1639 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); | |
1640 | pim_upstream_fhr_kat_start(up); | |
1641 | } | |
1642 | pim_upstream_keep_alive_timer_start(up, qpim_keep_alive_time); | |
1643 | } else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) | |
1644 | pim_upstream_keep_alive_timer_start(up, qpim_keep_alive_time); | |
1645 | ||
1646 | if (up->sptbit != PIM_UPSTREAM_SPTBIT_TRUE) { | |
1647 | pim_upstream_set_sptbit(up, up->rpf.source_nexthop.interface); | |
850a9f99 | 1648 | } |
ac4d0be5 | 1649 | return; |
9c5e4d62 DS |
1650 | } |
1651 | ||
ac4d0be5 | 1652 | void pim_upstream_add_lhr_star_pimreg(void) |
a7b2b1e2 | 1653 | { |
ac4d0be5 | 1654 | struct pim_upstream *up; |
1655 | struct listnode *node; | |
a7b2b1e2 | 1656 | |
ac4d0be5 | 1657 | for (ALL_LIST_ELEMENTS_RO(pim_upstream_list, node, up)) { |
1658 | if (up->sg.src.s_addr != INADDR_ANY) | |
1659 | continue; | |
a7b2b1e2 | 1660 | |
ac4d0be5 | 1661 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) |
1662 | continue; | |
a7b2b1e2 | 1663 | |
ac4d0be5 | 1664 | pim_channel_add_oif(up->channel_oil, pim_regiface, |
1665 | PIM_OIF_FLAG_PROTO_IGMP); | |
1666 | } | |
a7b2b1e2 DS |
1667 | } |
1668 | ||
ac4d0be5 | 1669 | void pim_upstream_spt_prefix_list_update(struct prefix_list *pl) |
df94f9a9 | 1670 | { |
ac4d0be5 | 1671 | const char *pname = prefix_list_name(pl); |
df94f9a9 | 1672 | |
ac4d0be5 | 1673 | if (pimg->spt.plist && strcmp(pimg->spt.plist, pname) == 0) { |
1674 | pim_upstream_remove_lhr_star_pimreg(pname); | |
1675 | } | |
df94f9a9 DS |
1676 | } |
1677 | ||
1678 | /* | |
1679 | * nlist -> The new prefix list | |
1680 | * | |
1681 | * Per Group Application of pimreg to the OIL | |
1682 | * If the prefix list tells us DENY then | |
1683 | * we need to Switchover to SPT immediate | |
1684 | * so add the pimreg. | |
1685 | * If the prefix list tells us to ACCEPT than | |
1686 | * we need to Never do the SPT so remove | |
1687 | * the interface | |
1688 | * | |
1689 | */ | |
ac4d0be5 | 1690 | void pim_upstream_remove_lhr_star_pimreg(const char *nlist) |
a7b2b1e2 | 1691 | { |
ac4d0be5 | 1692 | struct pim_upstream *up; |
1693 | struct listnode *node; | |
1694 | struct prefix_list *np; | |
1695 | struct prefix g; | |
1696 | enum prefix_list_type apply_new; | |
1697 | ||
1698 | np = prefix_list_lookup(AFI_IP, nlist); | |
1699 | ||
1700 | g.family = AF_INET; | |
1701 | g.prefixlen = IPV4_MAX_PREFIXLEN; | |
1702 | ||
1703 | for (ALL_LIST_ELEMENTS_RO(pim_upstream_list, node, up)) { | |
1704 | if (up->sg.src.s_addr != INADDR_ANY) | |
1705 | continue; | |
1706 | ||
1707 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP(up->flags)) | |
1708 | continue; | |
1709 | ||
1710 | if (!nlist) { | |
1711 | pim_channel_del_oif(up->channel_oil, pim_regiface, | |
1712 | PIM_OIF_FLAG_PROTO_IGMP); | |
1713 | continue; | |
1714 | } | |
1715 | g.u.prefix4 = up->sg.grp; | |
1716 | apply_new = prefix_list_apply(np, &g); | |
1717 | if (apply_new == PREFIX_DENY) | |
1718 | pim_channel_add_oif(up->channel_oil, pim_regiface, | |
1719 | PIM_OIF_FLAG_PROTO_IGMP); | |
1720 | else | |
1721 | pim_channel_del_oif(up->channel_oil, pim_regiface, | |
1722 | PIM_OIF_FLAG_PROTO_IGMP); | |
1723 | } | |
a7b2b1e2 DS |
1724 | } |
1725 | ||
ac4d0be5 | 1726 | void pim_upstream_init(void) |
0f588989 | 1727 | { |
ac4d0be5 | 1728 | pim_upstream_sg_wheel = |
1729 | wheel_init(master, 31000, 100, pim_upstream_hash_key, | |
1730 | pim_upstream_sg_running); | |
1731 | pim_upstream_hash = hash_create_size(8192, pim_upstream_hash_key, | |
1732 | pim_upstream_equal); | |
1733 | ||
1734 | pim_upstream_list = list_new(); | |
1735 | pim_upstream_list->del = (void (*)(void *))pim_upstream_free; | |
1736 | pim_upstream_list->cmp = pim_upstream_compare; | |
0f588989 | 1737 | } |