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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. | |
14 | ||
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" |
12e41d03 | 55 | |
0f588989 DS |
56 | struct hash *pim_upstream_hash = NULL; |
57 | struct list *pim_upstream_list = NULL; | |
9c5e4d62 | 58 | struct timer_wheel *pim_upstream_sg_wheel = NULL; |
0f588989 | 59 | |
982bff89 | 60 | static void join_timer_stop(struct pim_upstream *up); |
12e41d03 DL |
61 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); |
62 | ||
cfa91a87 DS |
63 | /* |
64 | * A (*,G) or a (*,*) is going away | |
65 | * remove the parent pointer from | |
66 | * those pointing at us | |
67 | */ | |
68 | static void | |
69 | pim_upstream_remove_children (struct pim_upstream *up) | |
70 | { | |
cfa91a87 DS |
71 | struct pim_upstream *child; |
72 | ||
03417ccd | 73 | if (!up->sources) |
cfa91a87 DS |
74 | return; |
75 | ||
03417ccd | 76 | while (!list_isempty (up->sources)) |
cfa91a87 | 77 | { |
03417ccd DS |
78 | child = listnode_head (up->sources); |
79 | child->parent = NULL; | |
80 | listnode_delete (up->sources, child); | |
cfa91a87 DS |
81 | } |
82 | } | |
83 | ||
84 | /* | |
85 | * A (*,G) or a (*,*) is being created | |
86 | * Find the children that would point | |
87 | * at us. | |
88 | */ | |
89 | static void | |
90 | pim_upstream_find_new_children (struct pim_upstream *up) | |
91 | { | |
92 | struct pim_upstream *child; | |
93 | struct listnode *ch_node; | |
94 | ||
4ed0af70 DS |
95 | if ((up->sg.src.s_addr != INADDR_ANY) && |
96 | (up->sg.grp.s_addr != INADDR_ANY)) | |
cfa91a87 DS |
97 | return; |
98 | ||
4ed0af70 DS |
99 | if ((up->sg.src.s_addr == INADDR_ANY) && |
100 | (up->sg.grp.s_addr == INADDR_ANY)) | |
cfa91a87 DS |
101 | return; |
102 | ||
0f588989 | 103 | for (ALL_LIST_ELEMENTS_RO (pim_upstream_list, ch_node, child)) |
cfa91a87 | 104 | { |
4ed0af70 | 105 | if ((up->sg.grp.s_addr != INADDR_ANY) && |
0f588989 | 106 | (child->sg.grp.s_addr == up->sg.grp.s_addr) && |
cfa91a87 | 107 | (child != up)) |
03417ccd DS |
108 | { |
109 | child->parent = up; | |
110 | listnode_add_sort (up->sources, child); | |
111 | } | |
cfa91a87 DS |
112 | } |
113 | } | |
114 | ||
4d99418b DS |
115 | /* |
116 | * If we have a (*,*) || (S,*) there is no parent | |
117 | * If we have a (S,G), find the (*,G) | |
118 | * If we have a (*,G), find the (*,*) | |
119 | */ | |
120 | static struct pim_upstream * | |
03417ccd | 121 | pim_upstream_find_parent (struct pim_upstream *child) |
4d99418b | 122 | { |
03417ccd DS |
123 | struct prefix_sg any = child->sg; |
124 | struct pim_upstream *up = NULL; | |
4d99418b DS |
125 | |
126 | // (S,G) | |
03417ccd DS |
127 | if ((child->sg.src.s_addr != INADDR_ANY) && |
128 | (child->sg.grp.s_addr != INADDR_ANY)) | |
4d99418b | 129 | { |
4ed0af70 | 130 | any.src.s_addr = INADDR_ANY; |
03417ccd DS |
131 | up = pim_upstream_find (&any); |
132 | ||
133 | if (up) | |
134 | listnode_add (up->sources, child); | |
135 | ||
136 | return up; | |
4d99418b DS |
137 | } |
138 | ||
03417ccd | 139 | return NULL; |
4d99418b DS |
140 | } |
141 | ||
12e41d03 DL |
142 | void pim_upstream_free(struct pim_upstream *up) |
143 | { | |
144 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
145 | } | |
146 | ||
147 | static void upstream_channel_oil_detach(struct pim_upstream *up) | |
148 | { | |
149 | if (up->channel_oil) { | |
150 | pim_channel_oil_del(up->channel_oil); | |
25a335e0 | 151 | up->channel_oil = NULL; |
12e41d03 DL |
152 | } |
153 | } | |
154 | ||
e5905a3b DS |
155 | void |
156 | pim_upstream_del(struct pim_upstream *up, const char *name) | |
12e41d03 | 157 | { |
7667c556 | 158 | bool notify_msdp = false; |
159 | ||
3197cb1e DS |
160 | if (PIM_DEBUG_TRACE) |
161 | zlog_debug ("%s(%s): Delete %s ref count: %d", | |
162 | __PRETTY_FUNCTION__, name, up->sg_str, up->ref_count); | |
163 | ||
e5905a3b DS |
164 | --up->ref_count; |
165 | ||
166 | if (up->ref_count >= 1) | |
167 | return; | |
168 | ||
982bff89 | 169 | join_timer_stop(up); |
f14248dd | 170 | THREAD_OFF(up->t_ka_timer); |
792f4d29 | 171 | THREAD_OFF(up->t_rs_timer); |
1bf16443 | 172 | THREAD_OFF(up->t_msdp_reg_timer); |
12e41d03 | 173 | |
7667c556 | 174 | if (up->join_state == PIM_UPSTREAM_JOINED) { |
982bff89 DS |
175 | pim_jp_agg_single_upstream_send (&up->rpf, up, 0); |
176 | ||
7667c556 | 177 | if (up->sg.src.s_addr == INADDR_ANY) { |
178 | /* if a (*, G) entry in the joined state is being deleted we | |
179 | * need to notify MSDP */ | |
180 | notify_msdp = true; | |
181 | } | |
182 | } | |
183 | ||
36e466fe | 184 | if (up->sg.src.s_addr != INADDR_ANY) { |
9c5e4d62 | 185 | wheel_remove_item (pim_upstream_sg_wheel, up); |
36e466fe | 186 | notify_msdp = true; |
187 | } | |
9c5e4d62 | 188 | |
cfa91a87 | 189 | pim_upstream_remove_children (up); |
6a78764e | 190 | pim_mroute_del (up->channel_oil, __PRETTY_FUNCTION__); |
12e41d03 DL |
191 | upstream_channel_oil_detach(up); |
192 | ||
03417ccd DS |
193 | if (up->sources) |
194 | list_delete (up->sources); | |
195 | up->sources = NULL; | |
196 | ||
12e41d03 DL |
197 | /* |
198 | notice that listnode_delete() can't be moved | |
199 | into pim_upstream_free() because the later is | |
200 | called by list_delete_all_node() | |
201 | */ | |
03417ccd DS |
202 | if (up->parent) |
203 | { | |
204 | listnode_delete (up->parent->sources, up); | |
205 | up->parent = NULL; | |
206 | } | |
0f588989 DS |
207 | listnode_delete (pim_upstream_list, up); |
208 | hash_release (pim_upstream_hash, up); | |
12e41d03 | 209 | |
7667c556 | 210 | if (notify_msdp) { |
36e466fe | 211 | pim_msdp_up_del(&up->sg); |
7667c556 | 212 | } |
12e41d03 DL |
213 | pim_upstream_free(up); |
214 | } | |
215 | ||
56638739 DS |
216 | void |
217 | pim_upstream_send_join (struct pim_upstream *up) | |
12e41d03 | 218 | { |
3197cb1e | 219 | if (PIM_DEBUG_TRACE) { |
eaa54bdb | 220 | char rpf_str[PREFIX_STRLEN]; |
63c59d0c | 221 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 222 | zlog_debug ("%s: RPF'%s=%s(%s) for Interface %s", __PRETTY_FUNCTION__, |
8bfb8b67 | 223 | up->sg_str, rpf_str, pim_upstream_state2str (up->join_state), |
56638739 | 224 | up->rpf.source_nexthop.interface->name); |
63c59d0c | 225 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { |
05e451f8 | 226 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", |
56638739 | 227 | __PRETTY_FUNCTION__, |
8bfb8b67 | 228 | up->sg_str, rpf_str); |
12e41d03 DL |
229 | /* warning only */ |
230 | } | |
231 | } | |
56638739 | 232 | |
12e41d03 | 233 | /* send Join(S,G) to the current upstream neighbor */ |
982bff89 | 234 | pim_jp_agg_single_upstream_send(&up->rpf, up, 1 /* join */); |
12e41d03 DL |
235 | } |
236 | ||
237 | static int on_join_timer(struct thread *t) | |
238 | { | |
239 | struct pim_upstream *up; | |
240 | ||
12e41d03 | 241 | up = THREAD_ARG(t); |
12e41d03 | 242 | |
bb6e291f DS |
243 | up->t_join_timer = NULL; |
244 | ||
245 | /* | |
246 | * In the case of a HFR we will not ahve anyone to send this to. | |
247 | */ | |
0bf27c5c | 248 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
bb6e291f DS |
249 | return 0; |
250 | ||
eb345962 DS |
251 | /* |
252 | * Don't send the join if the outgoing interface is a loopback | |
253 | * But since this might change leave the join timer running | |
254 | */ | |
255 | if (!if_is_loopback (up->rpf.source_nexthop.interface)) | |
256 | pim_upstream_send_join (up); | |
12e41d03 | 257 | |
12e41d03 DL |
258 | join_timer_start(up); |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
982bff89 | 263 | static void join_timer_stop(struct pim_upstream *up) |
12e41d03 | 264 | { |
982bff89 DS |
265 | struct pim_neighbor *nbr; |
266 | ||
267 | nbr = pim_neighbor_find (up->rpf.source_nexthop.interface, | |
268 | up->rpf.rpf_addr.u.prefix4); | |
269 | ||
270 | if (nbr) | |
271 | pim_jp_agg_remove_group (nbr->upstream_jp_agg, up); | |
272 | ||
273 | THREAD_OFF (up->t_join_timer); | |
274 | } | |
275 | ||
276 | void | |
277 | join_timer_start(struct pim_upstream *up) | |
278 | { | |
279 | struct pim_neighbor *nbr; | |
280 | ||
281 | nbr = pim_neighbor_find (up->rpf.source_nexthop.interface, | |
282 | up->rpf.rpf_addr.u.prefix4); | |
283 | ||
12e41d03 | 284 | if (PIM_DEBUG_PIM_EVENTS) { |
05e451f8 | 285 | zlog_debug("%s: starting %d sec timer for upstream (S,G)=%s", |
12e41d03 DL |
286 | __PRETTY_FUNCTION__, |
287 | qpim_t_periodic, | |
8bfb8b67 | 288 | up->sg_str); |
12e41d03 DL |
289 | } |
290 | ||
982bff89 DS |
291 | if (nbr) |
292 | pim_jp_agg_add_group (nbr->upstream_jp_agg, up, 1); | |
293 | else | |
294 | { | |
295 | THREAD_OFF (up->t_join_timer); | |
296 | THREAD_TIMER_ON(master, up->t_join_timer, | |
297 | on_join_timer, | |
298 | up, qpim_t_periodic); | |
299 | } | |
12e41d03 DL |
300 | } |
301 | ||
982bff89 DS |
302 | /* |
303 | * This is only called when we are switching the upstream | |
304 | * J/P from one neighbor to another | |
305 | * | |
306 | * As such we need to remove from the old list and | |
307 | * add to the new list. | |
308 | */ | |
309 | void pim_upstream_join_timer_restart(struct pim_upstream *up, struct pim_rpf *old) | |
12e41d03 | 310 | { |
982bff89 DS |
311 | struct pim_neighbor *nbr; |
312 | ||
313 | nbr = pim_neighbor_find (old->source_nexthop.interface, | |
314 | old->rpf_addr.u.prefix4); | |
315 | if (nbr) | |
316 | pim_jp_agg_remove_group (nbr->upstream_jp_agg, up); | |
317 | ||
318 | //THREAD_OFF(up->t_join_timer); | |
12e41d03 DL |
319 | join_timer_start(up); |
320 | } | |
321 | ||
322 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
323 | int interval_msec) | |
324 | { | |
325 | if (PIM_DEBUG_PIM_EVENTS) { | |
05e451f8 | 326 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", |
12e41d03 DL |
327 | __PRETTY_FUNCTION__, |
328 | interval_msec, | |
8bfb8b67 | 329 | up->sg_str); |
12e41d03 DL |
330 | } |
331 | ||
332 | THREAD_OFF(up->t_join_timer); | |
333 | THREAD_TIMER_MSEC_ON(master, up->t_join_timer, | |
334 | on_join_timer, | |
335 | up, interval_msec); | |
336 | } | |
337 | ||
338 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
339 | struct in_addr rpf_addr, | |
340 | int holdtime) | |
341 | { | |
342 | long t_joinsuppress_msec; | |
343 | long join_timer_remain_msec; | |
344 | ||
345 | t_joinsuppress_msec = MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
346 | 1000 * holdtime); | |
347 | ||
348 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
349 | ||
3197cb1e | 350 | if (PIM_DEBUG_TRACE) { |
eaa54bdb | 351 | char rpf_str[INET_ADDRSTRLEN]; |
12e41d03 | 352 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 353 | zlog_debug("%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", |
12e41d03 | 354 | __FILE__, __PRETTY_FUNCTION__, |
8bfb8b67 | 355 | up->sg_str, |
12e41d03 DL |
356 | rpf_str, |
357 | join_timer_remain_msec, t_joinsuppress_msec); | |
358 | } | |
359 | ||
360 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
3197cb1e | 361 | if (PIM_DEBUG_TRACE) { |
05e451f8 | 362 | zlog_debug("%s %s: suppressing Join(S,G)=%s for %ld msec", |
12e41d03 | 363 | __FILE__, __PRETTY_FUNCTION__, |
8bfb8b67 | 364 | up->sg_str, t_joinsuppress_msec); |
12e41d03 DL |
365 | } |
366 | ||
367 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
368 | } | |
369 | } | |
370 | ||
371 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
c48a612c | 372 | struct pim_upstream *up) |
12e41d03 DL |
373 | { |
374 | long join_timer_remain_msec; | |
375 | int t_override_msec; | |
376 | ||
377 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
378 | t_override_msec = pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
379 | ||
3197cb1e | 380 | if (PIM_DEBUG_TRACE) { |
eaa54bdb | 381 | char rpf_str[INET_ADDRSTRLEN]; |
c48a612c | 382 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr.u.prefix4, rpf_str, sizeof(rpf_str)); |
05e451f8 | 383 | zlog_debug("%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", |
12e41d03 | 384 | debug_label, |
8bfb8b67 | 385 | up->sg_str, rpf_str, |
12e41d03 DL |
386 | join_timer_remain_msec, t_override_msec); |
387 | } | |
388 | ||
389 | if (join_timer_remain_msec > t_override_msec) { | |
3197cb1e | 390 | if (PIM_DEBUG_TRACE) { |
05e451f8 | 391 | zlog_debug("%s: decreasing (S,G)=%s join timer to t_override=%d msec", |
12e41d03 | 392 | debug_label, |
8bfb8b67 | 393 | up->sg_str, |
12e41d03 DL |
394 | t_override_msec); |
395 | } | |
396 | ||
397 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
398 | } | |
399 | } | |
400 | ||
401 | static void forward_on(struct pim_upstream *up) | |
402 | { | |
12e41d03 DL |
403 | struct listnode *chnode; |
404 | struct listnode *chnextnode; | |
12e41d03 DL |
405 | struct pim_interface *pim_ifp; |
406 | struct pim_ifchannel *ch; | |
407 | ||
ea4a71fc DS |
408 | /* scan (S,G) state */ |
409 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
410 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
411 | if (!pim_ifp) |
412 | continue; | |
413 | ||
ea4a71fc DS |
414 | if (ch->upstream != up) |
415 | continue; | |
12e41d03 | 416 | |
ea4a71fc DS |
417 | if (pim_macro_chisin_oiflist(ch)) |
418 | pim_forward_start(ch); | |
12e41d03 | 419 | |
ea4a71fc | 420 | } /* scan iface channel list */ |
12e41d03 DL |
421 | } |
422 | ||
423 | static void forward_off(struct pim_upstream *up) | |
424 | { | |
12e41d03 DL |
425 | struct listnode *chnode; |
426 | struct listnode *chnextnode; | |
12e41d03 DL |
427 | struct pim_interface *pim_ifp; |
428 | struct pim_ifchannel *ch; | |
429 | ||
ea4a71fc DS |
430 | /* scan per-interface (S,G) state */ |
431 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
432 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
433 | if (!pim_ifp) |
434 | continue; | |
435 | ||
ea4a71fc DS |
436 | if (ch->upstream != up) |
437 | continue; | |
12e41d03 | 438 | |
ea4a71fc | 439 | pim_forward_stop(ch); |
12e41d03 | 440 | |
ea4a71fc | 441 | } /* scan iface channel list */ |
12e41d03 DL |
442 | } |
443 | ||
bb6e291f DS |
444 | static int |
445 | pim_upstream_could_register (struct pim_upstream *up) | |
446 | { | |
447 | struct pim_interface *pim_ifp = up->rpf.source_nexthop.interface->info; | |
448 | ||
35917570 | 449 | if (pim_ifp && PIM_I_am_DR (pim_ifp) && |
bb6e291f DS |
450 | pim_if_connected_to_source (up->rpf.source_nexthop.interface, up->sg.src)) |
451 | return 1; | |
452 | ||
453 | return 0; | |
454 | } | |
455 | ||
7fcdfb34 DS |
456 | void |
457 | pim_upstream_switch(struct pim_upstream *up, | |
458 | enum pim_upstream_state new_state) | |
12e41d03 DL |
459 | { |
460 | enum pim_upstream_state old_state = up->join_state; | |
461 | ||
12e41d03 | 462 | if (PIM_DEBUG_PIM_EVENTS) { |
c9802954 | 463 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", |
12e41d03 | 464 | __PRETTY_FUNCTION__, |
8bfb8b67 | 465 | up->sg_str, |
c9802954 DS |
466 | pim_upstream_state2str (up->join_state), |
467 | pim_upstream_state2str (new_state)); | |
12e41d03 DL |
468 | } |
469 | ||
bb027ee8 DS |
470 | /* |
471 | * This code still needs work. | |
472 | */ | |
473 | switch (up->join_state) | |
474 | { | |
475 | case PIM_UPSTREAM_PRUNE: | |
0bf27c5c | 476 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
7747bad6 DS |
477 | { |
478 | up->join_state = new_state; | |
479 | up->state_transition = pim_time_monotonic_sec (); | |
480 | } | |
481 | break; | |
bb027ee8 DS |
482 | case PIM_UPSTREAM_JOIN_PENDING: |
483 | break; | |
484 | case PIM_UPSTREAM_NOTJOINED: | |
485 | case PIM_UPSTREAM_JOINED: | |
486 | up->join_state = new_state; | |
e5b6b229 DS |
487 | if (old_state != new_state) |
488 | up->state_transition = pim_time_monotonic_sec(); | |
bb027ee8 DS |
489 | |
490 | break; | |
491 | } | |
492 | ||
12e41d03 DL |
493 | pim_upstream_update_assert_tracking_desired(up); |
494 | ||
495 | if (new_state == PIM_UPSTREAM_JOINED) { | |
81900c5a DS |
496 | if (old_state != PIM_UPSTREAM_JOINED) |
497 | { | |
0bf27c5c | 498 | int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags); |
81900c5a | 499 | forward_on(up); |
7667c556 | 500 | pim_msdp_up_join_state_changed(up); |
0bf27c5c | 501 | if (pim_upstream_could_register (up)) |
bb6e291f | 502 | { |
0bf27c5c | 503 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); |
a9b59879 | 504 | if (!old_fhr && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) |
bb6e291f DS |
505 | { |
506 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); | |
507 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
508 | } | |
509 | } | |
510 | else | |
511 | { | |
512 | pim_upstream_send_join (up); | |
513 | join_timer_start (up); | |
514 | } | |
81900c5a DS |
515 | } |
516 | else | |
517 | { | |
518 | forward_on (up); | |
519 | } | |
12e41d03 DL |
520 | } |
521 | else { | |
982bff89 | 522 | |
12e41d03 | 523 | forward_off(up); |
7667c556 | 524 | if (old_state == PIM_UPSTREAM_JOINED) |
525 | pim_msdp_up_join_state_changed(up); | |
982bff89 DS |
526 | |
527 | pim_jp_agg_single_upstream_send(&up->rpf, up, 0 /* prune */); | |
528 | join_timer_stop(up); | |
12e41d03 | 529 | } |
12e41d03 DL |
530 | } |
531 | ||
03417ccd DS |
532 | static int |
533 | pim_upstream_compare (void *arg1, void *arg2) | |
534 | { | |
535 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; | |
536 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
537 | ||
538 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) | |
539 | return -1; | |
540 | ||
541 | if (ntohl(up1->sg.grp.s_addr) > ntohl(up2->sg.grp.s_addr)) | |
542 | return 1; | |
543 | ||
544 | if (ntohl(up1->sg.src.s_addr) < ntohl(up2->sg.src.s_addr)) | |
545 | return -1; | |
546 | ||
547 | if (ntohl(up1->sg.src.s_addr) > ntohl(up2->sg.src.s_addr)) | |
548 | return 1; | |
549 | ||
550 | return 0; | |
551 | } | |
552 | ||
07335c8d DS |
553 | static struct pim_upstream * |
554 | pim_upstream_new (struct prefix_sg *sg, | |
555 | struct interface *incoming, | |
556 | int flags) | |
12e41d03 | 557 | { |
2f702571 | 558 | enum pim_rpf_result rpf_result; |
07335c8d DS |
559 | struct pim_interface *pim_ifp; |
560 | struct pim_upstream *up; | |
12e41d03 | 561 | |
36d9e7dc | 562 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); |
12e41d03 | 563 | if (!up) { |
36d9e7dc | 564 | zlog_err("%s: PIM XCALLOC(%zu) failure", |
12e41d03 | 565 | __PRETTY_FUNCTION__, sizeof(*up)); |
8f5f5e91 | 566 | return NULL; |
12e41d03 DL |
567 | } |
568 | ||
5074a423 | 569 | up->sg = *sg; |
8bfb8b67 | 570 | pim_str_sg_set (sg, up->sg_str); |
0f588989 | 571 | up = hash_get (pim_upstream_hash, up, hash_alloc_intern); |
36d6bd7d | 572 | if (!pim_rp_set_upstream_addr (&up->upstream_addr, sg->src, sg->grp)) |
8f5f5e91 | 573 | { |
3197cb1e | 574 | if (PIM_DEBUG_TRACE) |
8f5f5e91 DS |
575 | zlog_debug("%s: Received a (*,G) with no RP configured", __PRETTY_FUNCTION__); |
576 | ||
03417ccd | 577 | hash_release (pim_upstream_hash, up); |
8f5f5e91 DS |
578 | XFREE (MTYPE_PIM_UPSTREAM, up); |
579 | return NULL; | |
580 | } | |
581 | ||
03417ccd DS |
582 | up->parent = pim_upstream_find_parent (up); |
583 | if (up->sg.src.s_addr == INADDR_ANY) | |
584 | { | |
585 | up->sources = list_new (); | |
586 | up->sources->cmp = pim_upstream_compare; | |
587 | } | |
588 | else | |
589 | up->sources = NULL; | |
590 | ||
cfa91a87 | 591 | pim_upstream_find_new_children (up); |
4a40c37a | 592 | up->flags = flags; |
12e41d03 | 593 | up->ref_count = 1; |
4a4c4a07 DS |
594 | up->t_join_timer = NULL; |
595 | up->t_ka_timer = NULL; | |
792f4d29 | 596 | up->t_rs_timer = NULL; |
1bf16443 | 597 | up->t_msdp_reg_timer = NULL; |
12e41d03 DL |
598 | up->join_state = 0; |
599 | up->state_transition = pim_time_monotonic_sec(); | |
4a4c4a07 | 600 | up->channel_oil = NULL; |
f9e0ab5b | 601 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; |
12e41d03 | 602 | |
f24405b1 | 603 | up->rpf.source_nexthop.interface = NULL; |
63c59d0c DS |
604 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; |
605 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
12e41d03 DL |
606 | up->rpf.source_nexthop.mrib_metric_preference = qpim_infinite_assert_metric.metric_preference; |
607 | up->rpf.source_nexthop.mrib_route_metric = qpim_infinite_assert_metric.route_metric; | |
63c59d0c DS |
608 | up->rpf.rpf_addr.family = AF_INET; |
609 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
12e41d03 | 610 | |
9c5e4d62 DS |
611 | if (up->sg.src.s_addr != INADDR_ANY) |
612 | wheel_add_item (pim_upstream_sg_wheel, up); | |
613 | ||
d3dd1804 | 614 | rpf_result = pim_rpf_update(up, NULL); |
2f702571 | 615 | if (rpf_result == PIM_RPF_FAILURE) { |
3197cb1e | 616 | if (PIM_DEBUG_TRACE) |
4a40c37a | 617 | zlog_debug ("%s: Attempting to create upstream(%s), Unable to RPF for source", __PRETTY_FUNCTION__, |
8bfb8b67 | 618 | up->sg_str); |
03417ccd DS |
619 | |
620 | if (up->parent) | |
621 | { | |
622 | listnode_delete (up->parent->sources, up); | |
623 | up->parent = NULL; | |
624 | } | |
9c5e4d62 DS |
625 | |
626 | if (up->sg.src.s_addr != INADDR_ANY) | |
627 | wheel_remove_item (pim_upstream_sg_wheel, up); | |
628 | ||
03417ccd DS |
629 | pim_upstream_remove_children (up); |
630 | if (up->sources) | |
631 | list_delete (up->sources); | |
632 | ||
633 | hash_release (pim_upstream_hash, up); | |
2f702571 DS |
634 | XFREE(MTYPE_PIM_UPSTREAM, up); |
635 | return NULL; | |
636 | } | |
12e41d03 | 637 | |
07335c8d DS |
638 | pim_ifp = up->rpf.source_nexthop.interface->info; |
639 | if (pim_ifp) | |
640 | up->channel_oil = pim_channel_oil_add(&up->sg, pim_ifp->mroute_vif_index); | |
641 | ||
0f588989 | 642 | listnode_add_sort(pim_upstream_list, up); |
12e41d03 | 643 | |
3197cb1e | 644 | if (PIM_DEBUG_TRACE) |
8bfb8b67 | 645 | zlog_debug ("%s: Created Upstream %s", __PRETTY_FUNCTION__, up->sg_str); |
03417ccd | 646 | |
12e41d03 DL |
647 | return up; |
648 | } | |
649 | ||
4ed0af70 | 650 | struct pim_upstream *pim_upstream_find(struct prefix_sg *sg) |
12e41d03 | 651 | { |
0f588989 DS |
652 | struct pim_upstream lookup; |
653 | struct pim_upstream *up = NULL; | |
12e41d03 | 654 | |
0f588989 DS |
655 | lookup.sg = *sg; |
656 | up = hash_lookup (pim_upstream_hash, &lookup); | |
657 | return up; | |
12e41d03 DL |
658 | } |
659 | ||
1bf16443 | 660 | static void pim_upstream_ref(struct pim_upstream *up, int flags) |
661 | { | |
662 | up->flags |= flags; | |
663 | ++up->ref_count; | |
664 | } | |
665 | ||
4ed0af70 | 666 | struct pim_upstream *pim_upstream_add(struct prefix_sg *sg, |
4a40c37a | 667 | struct interface *incoming, |
e5905a3b | 668 | int flags, const char *name) |
12e41d03 | 669 | { |
594a78cc | 670 | struct pim_upstream *up = NULL; |
e5905a3b | 671 | int found = 0; |
5074a423 | 672 | up = pim_upstream_find(sg); |
12e41d03 | 673 | if (up) { |
1bf16443 | 674 | pim_upstream_ref(up, flags); |
e5905a3b | 675 | found = 1; |
12e41d03 DL |
676 | } |
677 | else { | |
4a40c37a | 678 | up = pim_upstream_new(sg, incoming, flags); |
12e41d03 DL |
679 | } |
680 | ||
e5905a3b | 681 | if (PIM_DEBUG_TRACE) |
f4075cb4 DS |
682 | { |
683 | if (up) | |
3197cb1e | 684 | zlog_debug("%s(%s): %s, found: %d: ref_count: %d", |
f4075cb4 | 685 | __PRETTY_FUNCTION__, name, |
8bfb8b67 | 686 | up->sg_str, found, |
f4075cb4 DS |
687 | up->ref_count); |
688 | else | |
689 | zlog_debug("%s(%s): (%s) failure to create", | |
690 | __PRETTY_FUNCTION__, name, | |
691 | pim_str_sg_dump (sg)); | |
692 | } | |
12e41d03 | 693 | |
e5905a3b | 694 | return up; |
12e41d03 DL |
695 | } |
696 | ||
9f44d042 | 697 | int |
7a3ddda5 DS |
698 | pim_upstream_evaluate_join_desired_interface (struct pim_upstream *up, |
699 | struct pim_ifchannel *ch) | |
700 | { | |
701 | struct pim_upstream *parent = up->parent; | |
702 | ||
703 | if (ch->upstream == up) | |
704 | { | |
705 | if (!pim_macro_ch_lost_assert(ch) && pim_macro_chisin_joins_or_include(ch)) | |
706 | return 1; | |
46c8aab8 DS |
707 | |
708 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
709 | return 0; | |
7a3ddda5 | 710 | } |
46c8aab8 | 711 | |
7a3ddda5 DS |
712 | /* |
713 | * joins (*,G) | |
714 | */ | |
715 | if (parent && ch->upstream == parent) | |
716 | { | |
717 | if (!pim_macro_ch_lost_assert (ch) && pim_macro_chisin_joins_or_include (ch)) | |
718 | return 1; | |
719 | } | |
720 | ||
721 | return 0; | |
722 | } | |
723 | ||
12e41d03 DL |
724 | /* |
725 | Evaluate JoinDesired(S,G): | |
726 | ||
727 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
728 | in the set: | |
729 | ||
730 | inherited_olist(S,G) = | |
731 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
732 | ||
733 | JoinDesired(S,G) may be affected by changes in the following: | |
734 | ||
735 | pim_ifp->primary_address | |
736 | pim_ifp->pim_dr_addr | |
737 | ch->ifassert_winner_metric | |
738 | ch->ifassert_winner | |
739 | ch->local_ifmembership | |
740 | ch->ifjoin_state | |
741 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
742 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
743 | ch->upstream->rpf.source_nexthop.interface | |
744 | ||
745 | See also pim_upstream_update_join_desired() below. | |
746 | */ | |
747 | int pim_upstream_evaluate_join_desired(struct pim_upstream *up) | |
748 | { | |
12e41d03 DL |
749 | struct listnode *chnode; |
750 | struct listnode *chnextnode; | |
12e41d03 DL |
751 | struct pim_interface *pim_ifp; |
752 | struct pim_ifchannel *ch; | |
7a3ddda5 | 753 | int ret = 0; |
12e41d03 | 754 | |
ea4a71fc DS |
755 | /* scan per-interface (S,G) state */ |
756 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) | |
757 | { | |
758 | pim_ifp = ch->interface->info; | |
759 | if (!pim_ifp) | |
760 | continue; | |
12e41d03 | 761 | |
ea4a71fc DS |
762 | ret += pim_upstream_evaluate_join_desired_interface (up, ch); |
763 | } /* scan iface channel list */ | |
12e41d03 | 764 | |
7a3ddda5 | 765 | return ret; /* false */ |
12e41d03 DL |
766 | } |
767 | ||
768 | /* | |
769 | See also pim_upstream_evaluate_join_desired() above. | |
770 | */ | |
771 | void pim_upstream_update_join_desired(struct pim_upstream *up) | |
772 | { | |
773 | int was_join_desired; /* boolean */ | |
774 | int is_join_desired; /* boolean */ | |
775 | ||
776 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
777 | ||
778 | is_join_desired = pim_upstream_evaluate_join_desired(up); | |
779 | if (is_join_desired) | |
780 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
781 | else | |
782 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
783 | ||
784 | /* switched from false to true */ | |
785 | if (is_join_desired && !was_join_desired) { | |
12e41d03 DL |
786 | pim_upstream_switch(up, PIM_UPSTREAM_JOINED); |
787 | return; | |
788 | } | |
789 | ||
790 | /* switched from true to false */ | |
791 | if (!is_join_desired && was_join_desired) { | |
12e41d03 DL |
792 | pim_upstream_switch(up, PIM_UPSTREAM_NOTJOINED); |
793 | return; | |
794 | } | |
795 | } | |
796 | ||
797 | /* | |
798 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
799 | Transitions from Joined State | |
800 | RPF'(S,G) GenID changes | |
801 | ||
802 | The upstream (S,G) state machine remains in Joined state. If the | |
803 | Join Timer is set to expire in more than t_override seconds, reset | |
804 | it so that it expires after t_override seconds. | |
805 | */ | |
806 | void pim_upstream_rpf_genid_changed(struct in_addr neigh_addr) | |
807 | { | |
808 | struct listnode *up_node; | |
809 | struct listnode *up_nextnode; | |
810 | struct pim_upstream *up; | |
811 | ||
812 | /* | |
0f588989 DS |
813 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr |
814 | */ | |
815 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) { | |
12e41d03 | 816 | |
3197cb1e | 817 | if (PIM_DEBUG_TRACE) { |
eaa54bdb DW |
818 | char neigh_str[INET_ADDRSTRLEN]; |
819 | char rpf_addr_str[PREFIX_STRLEN]; | |
12e41d03 | 820 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, sizeof(neigh_str)); |
63c59d0c | 821 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, sizeof(rpf_addr_str)); |
05e451f8 | 822 | zlog_debug("%s: matching neigh=%s against upstream (S,G)=%s joined=%d rpf_addr=%s", |
12e41d03 | 823 | __PRETTY_FUNCTION__, |
8bfb8b67 | 824 | neigh_str, up->sg_str, |
12e41d03 DL |
825 | up->join_state == PIM_UPSTREAM_JOINED, |
826 | rpf_addr_str); | |
827 | } | |
828 | ||
829 | /* consider only (S,G) upstream in Joined state */ | |
830 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
831 | continue; | |
832 | ||
833 | /* match RPF'(S,G)=neigh_addr */ | |
63c59d0c | 834 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) |
12e41d03 DL |
835 | continue; |
836 | ||
837 | pim_upstream_join_timer_decrease_to_t_override("RPF'(S,G) GenID change", | |
c48a612c | 838 | up); |
12e41d03 DL |
839 | } |
840 | } | |
841 | ||
842 | ||
843 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
844 | struct interface *old_rpf_ifp) | |
845 | { | |
ea4a71fc DS |
846 | struct listnode *chnode; |
847 | struct listnode *chnextnode; | |
848 | struct pim_ifchannel *ch; | |
849 | struct pim_interface *pim_ifp; | |
850 | ||
851 | /* search all ifchannels */ | |
852 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
853 | ||
854 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
855 | if (!pim_ifp) |
856 | continue; | |
857 | ||
ea4a71fc DS |
858 | if (ch->upstream != up) |
859 | continue; | |
12e41d03 | 860 | |
ea4a71fc DS |
861 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { |
862 | if ( | |
863 | /* RPF_interface(S) was NOT I */ | |
864 | (old_rpf_ifp == ch->interface) | |
865 | && | |
866 | /* RPF_interface(S) stopped being I */ | |
867 | (ch->upstream->rpf.source_nexthop.interface != ch->interface) | |
868 | ) { | |
869 | assert_action_a5(ch); | |
870 | } | |
871 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
12e41d03 | 872 | |
ea4a71fc | 873 | pim_ifchannel_update_assert_tracking_desired(ch); |
12e41d03 DL |
874 | } |
875 | } | |
876 | ||
877 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
878 | { | |
12e41d03 DL |
879 | struct listnode *chnode; |
880 | struct listnode *chnextnode; | |
12e41d03 DL |
881 | struct pim_interface *pim_ifp; |
882 | struct pim_ifchannel *ch; | |
883 | ||
ea4a71fc DS |
884 | /* scan per-interface (S,G) state */ |
885 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
886 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
887 | if (!pim_ifp) |
888 | continue; | |
889 | ||
ea4a71fc DS |
890 | if (ch->upstream != up) |
891 | continue; | |
12e41d03 | 892 | |
ea4a71fc DS |
893 | pim_ifchannel_update_could_assert(ch); |
894 | } /* scan iface channel list */ | |
12e41d03 DL |
895 | } |
896 | ||
897 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
898 | { | |
12e41d03 DL |
899 | struct listnode *chnode; |
900 | struct listnode *chnextnode; | |
12e41d03 DL |
901 | struct pim_interface *pim_ifp; |
902 | struct pim_ifchannel *ch; | |
903 | ||
ea4a71fc DS |
904 | /* scan per-interface (S,G) state */ |
905 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
906 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
907 | if (!pim_ifp) |
908 | continue; | |
909 | ||
ea4a71fc DS |
910 | if (ch->upstream != up) |
911 | continue; | |
12e41d03 | 912 | |
ea4a71fc | 913 | pim_ifchannel_update_my_assert_metric(ch); |
12e41d03 | 914 | |
ea4a71fc | 915 | } /* scan iface channel list */ |
12e41d03 DL |
916 | } |
917 | ||
918 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
919 | { | |
12e41d03 DL |
920 | struct listnode *chnode; |
921 | struct listnode *chnextnode; | |
12e41d03 DL |
922 | struct pim_interface *pim_ifp; |
923 | struct pim_ifchannel *ch; | |
924 | ||
ea4a71fc DS |
925 | /* scan per-interface (S,G) state */ |
926 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
927 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
928 | if (!pim_ifp) |
929 | continue; | |
930 | ||
ea4a71fc DS |
931 | if (ch->upstream != up) |
932 | continue; | |
12e41d03 | 933 | |
ea4a71fc | 934 | pim_ifchannel_update_assert_tracking_desired(ch); |
12e41d03 | 935 | |
ea4a71fc | 936 | } /* scan iface channel list */ |
12e41d03 | 937 | } |
f14248dd | 938 | |
1bf16443 | 939 | /* When kat is stopped CouldRegister goes to false so we need to |
940 | * transition the (S, G) on FHR to NI state and remove reg tunnel | |
941 | * from the OIL */ | |
942 | static void pim_upstream_fhr_kat_expiry(struct pim_upstream *up) | |
943 | { | |
944 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) | |
945 | return; | |
946 | ||
947 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 DS |
948 | zlog_debug ("kat expired on %s; clear fhr reg state", up->sg_str); |
949 | ||
1bf16443 | 950 | /* stop reg-stop timer */ |
951 | THREAD_OFF(up->t_rs_timer); | |
952 | /* remove regiface from the OIL if it is there*/ | |
953 | pim_channel_del_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
954 | /* move to "not-joined" */ | |
955 | up->join_state = PIM_UPSTREAM_NOTJOINED; | |
956 | PIM_UPSTREAM_FLAG_UNSET_FHR(up->flags); | |
957 | } | |
958 | ||
959 | /* When kat is started CouldRegister can go to true. And if it does we | |
960 | * need to transition the (S, G) on FHR to JOINED state and add reg tunnel | |
961 | * to the OIL */ | |
962 | static void pim_upstream_fhr_kat_start(struct pim_upstream *up) | |
963 | { | |
964 | if (pim_upstream_could_register(up)) { | |
965 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 DS |
966 | zlog_debug ("kat started on %s; set fhr reg state to joined", up->sg_str); |
967 | ||
1bf16443 | 968 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); |
969 | if (up->join_state == PIM_UPSTREAM_NOTJOINED) { | |
970 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
971 | up->join_state = PIM_UPSTREAM_JOINED; | |
972 | } | |
973 | } | |
974 | } | |
975 | ||
f14248dd DS |
976 | /* |
977 | * On an RP, the PMBR value must be cleared when the | |
978 | * Keepalive Timer expires | |
1bf16443 | 979 | * KAT expiry indicates that flow is inactive. If the flow was created or |
980 | * maintained by activity now is the time to deref it. | |
f14248dd DS |
981 | */ |
982 | static int | |
983 | pim_upstream_keep_alive_timer (struct thread *t) | |
984 | { | |
985 | struct pim_upstream *up; | |
986 | ||
987 | up = THREAD_ARG(t); | |
1bf16443 | 988 | up->t_ka_timer = NULL; |
f14248dd | 989 | |
4ed0af70 | 990 | if (I_am_RP (up->sg.grp)) |
1bf16443 | 991 | { |
992 | pim_br_clear_pmbr (&up->sg); | |
993 | /* | |
994 | * We need to do more here :) | |
995 | * But this is the start. | |
996 | */ | |
997 | } | |
14315ea8 | 998 | |
1bf16443 | 999 | /* source is no longer active - pull the SA from MSDP's cache */ |
1000 | pim_msdp_sa_local_del(&up->sg); | |
14315ea8 | 1001 | |
1bf16443 | 1002 | /* if entry was created because of activity we need to deref it */ |
1003 | if (PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) | |
1004 | { | |
1005 | pim_upstream_fhr_kat_expiry(up); | |
1006 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 | 1007 | zlog_debug ("kat expired on %s; remove stream reference", up->sg_str); |
1bf16443 | 1008 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(up->flags); |
1009 | pim_upstream_del(up, __PRETTY_FUNCTION__); | |
1010 | } | |
14315ea8 | 1011 | |
1bf16443 | 1012 | return 0; |
f14248dd DS |
1013 | } |
1014 | ||
f14248dd DS |
1015 | void |
1016 | pim_upstream_keep_alive_timer_start (struct pim_upstream *up, | |
1017 | uint32_t time) | |
1018 | { | |
1bf16443 | 1019 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { |
1020 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 | 1021 | zlog_debug ("kat start on %s with no stream reference", up->sg_str); |
1bf16443 | 1022 | } |
00d2f9e4 | 1023 | THREAD_OFF (up->t_ka_timer); |
f14248dd DS |
1024 | THREAD_TIMER_ON (master, |
1025 | up->t_ka_timer, | |
1026 | pim_upstream_keep_alive_timer, | |
1027 | up, time); | |
1bf16443 | 1028 | |
1029 | /* any time keepalive is started against a SG we will have to | |
1030 | * re-evaluate our active source database */ | |
1031 | pim_msdp_sa_local_update(up); | |
1032 | } | |
1033 | ||
1034 | /* MSDP on RP needs to know if a source is registerable to this RP */ | |
1035 | static int | |
1036 | pim_upstream_msdp_reg_timer(struct thread *t) | |
1037 | { | |
1038 | struct pim_upstream *up; | |
1039 | ||
1040 | up = THREAD_ARG(t); | |
1041 | up->t_msdp_reg_timer = NULL; | |
1042 | ||
1043 | /* source is no longer active - pull the SA from MSDP's cache */ | |
1044 | pim_msdp_sa_local_del(&up->sg); | |
1045 | return 1; | |
1046 | } | |
1047 | void | |
1048 | pim_upstream_msdp_reg_timer_start(struct pim_upstream *up) | |
1049 | { | |
1050 | THREAD_OFF(up->t_msdp_reg_timer); | |
1051 | THREAD_TIMER_ON(master, up->t_msdp_reg_timer, | |
1052 | pim_upstream_msdp_reg_timer, up, PIM_MSDP_REG_RXED_PERIOD); | |
1053 | ||
1054 | pim_msdp_sa_local_update(up); | |
f14248dd | 1055 | } |
cb40b272 DS |
1056 | |
1057 | /* | |
1058 | * 4.2.1 Last-Hop Switchover to the SPT | |
1059 | * | |
1060 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
1061 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
1062 | * router, it has the option of switching to receive the traffic on a | |
1063 | * shortest path tree (SPT). | |
1064 | * | |
1065 | * The decision for a router to switch to the SPT is controlled as | |
1066 | * follows: | |
1067 | * | |
1068 | * void | |
1069 | * CheckSwitchToSpt(S,G) { | |
1070 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
1071 | * (+) pim_include(S,G) != NULL ) | |
1072 | * AND SwitchToSptDesired(S,G) ) { | |
1073 | * # Note: Restarting the KAT will result in the SPT switch | |
1074 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1075 | * } | |
1076 | * } | |
1077 | * | |
1078 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
1079 | * defined. An "infinite threshold" policy can be implemented by making | |
1080 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
1081 | * first packet" policy can be implemented by making | |
1082 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
1083 | * received for the source and group. | |
1084 | */ | |
1085 | int | |
4ed0af70 | 1086 | pim_upstream_switch_to_spt_desired (struct prefix_sg *sg) |
cb40b272 | 1087 | { |
4ed0af70 | 1088 | if (I_am_RP (sg->grp)) |
a3b58b4a DS |
1089 | return 1; |
1090 | ||
cb40b272 DS |
1091 | return 0; |
1092 | } | |
d7259eac | 1093 | |
80d9c3a0 DS |
1094 | int |
1095 | pim_upstream_is_sg_rpt (struct pim_upstream *up) | |
1096 | { | |
f21597f0 DS |
1097 | struct listnode *chnode; |
1098 | struct pim_ifchannel *ch; | |
1099 | ||
1100 | for (ALL_LIST_ELEMENTS_RO(pim_ifchannel_list, chnode, ch)) | |
1101 | { | |
1102 | if ((ch->upstream == up) && | |
1103 | (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags))) | |
1104 | return 1; | |
1105 | } | |
e43b8697 | 1106 | |
80d9c3a0 DS |
1107 | return 0; |
1108 | } | |
3a66b17b DS |
1109 | /* |
1110 | * After receiving a packet set SPTbit: | |
1111 | * void | |
1112 | * Update_SPTbit(S,G,iif) { | |
1113 | * if ( iif == RPF_interface(S) | |
1114 | * AND JoinDesired(S,G) == TRUE | |
1115 | * AND ( DirectlyConnected(S) == TRUE | |
1116 | * OR RPF_interface(S) != RPF_interface(RP(G)) | |
1117 | * OR inherited_olist(S,G,rpt) == NULL | |
1118 | * OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1119 | * ( RPF'(S,G) != NULL ) ) | |
1120 | * OR ( I_Am_Assert_Loser(S,G,iif) ) { | |
1121 | * Set SPTbit(S,G) to TRUE | |
1122 | * } | |
1123 | * } | |
1124 | */ | |
1125 | void | |
1126 | pim_upstream_set_sptbit (struct pim_upstream *up, struct interface *incoming) | |
1127 | { | |
1128 | struct pim_rpf *grpf = NULL; | |
1129 | ||
1130 | // iif == RPF_interfvace(S) | |
1131 | if (up->rpf.source_nexthop.interface != incoming) | |
1132 | { | |
1133 | if (PIM_DEBUG_TRACE) | |
1134 | zlog_debug ("%s: Incoming Interface: %s is different than RPF_interface(S) %s", | |
1135 | __PRETTY_FUNCTION__, incoming->name, up->rpf.source_nexthop.interface->name); | |
1136 | return; | |
1137 | } | |
1138 | ||
1139 | // AND JoinDesired(S,G) == TRUE | |
1140 | // FIXME | |
1141 | ||
1142 | // DirectlyConnected(S) == TRUE | |
1143 | if (pim_if_connected_to_source (up->rpf.source_nexthop.interface, up->sg.src)) | |
1144 | { | |
1145 | if (PIM_DEBUG_TRACE) | |
1146 | zlog_debug ("%s: %s is directly connected to the source", __PRETTY_FUNCTION__, | |
8bfb8b67 | 1147 | up->sg_str); |
3a66b17b DS |
1148 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1149 | return; | |
1150 | } | |
1151 | ||
1152 | // OR RPF_interface(S) != RPF_interface(RP(G)) | |
1153 | grpf = RP(up->sg.grp); | |
1154 | if (!grpf || up->rpf.source_nexthop.interface != grpf->source_nexthop.interface) | |
1155 | { | |
1156 | if (PIM_DEBUG_TRACE) | |
1157 | zlog_debug ("%s: %s RPF_interface(S) != RPF_interface(RP(G))", | |
8bfb8b67 | 1158 | __PRETTY_FUNCTION__, up->sg_str); |
3a66b17b DS |
1159 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1160 | return; | |
1161 | } | |
1162 | ||
1163 | // OR inherited_olist(S,G,rpt) == NULL | |
1164 | if (pim_upstream_is_sg_rpt(up) && pim_upstream_empty_inherited_olist(up)) | |
1165 | { | |
1166 | if (PIM_DEBUG_TRACE) | |
1167 | zlog_debug ("%s: %s OR inherited_olist(S,G,rpt) == NULL", __PRETTY_FUNCTION__, | |
8bfb8b67 | 1168 | up->sg_str); |
3a66b17b DS |
1169 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1170 | return; | |
1171 | } | |
1172 | ||
1173 | // OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1174 | // ( RPF'(S,G) != NULL ) ) | |
1175 | if (up->parent && pim_rpf_is_same (&up->rpf, &up->parent->rpf)) | |
1176 | { | |
1177 | if (PIM_DEBUG_TRACE) | |
1178 | zlog_debug ("%s: %s RPF'(S,G) is the same as RPF'(*,G)", __PRETTY_FUNCTION__, | |
8bfb8b67 | 1179 | up->sg_str); |
3a66b17b DS |
1180 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1181 | return; | |
1182 | } | |
1183 | ||
1184 | return; | |
1185 | } | |
80d9c3a0 | 1186 | |
d7259eac | 1187 | const char * |
c9802954 | 1188 | pim_upstream_state2str (enum pim_upstream_state join_state) |
d7259eac | 1189 | { |
c9802954 | 1190 | switch (join_state) |
d7259eac DS |
1191 | { |
1192 | case PIM_UPSTREAM_NOTJOINED: | |
e775c0a4 | 1193 | return "NotJoined"; |
d7259eac DS |
1194 | break; |
1195 | case PIM_UPSTREAM_JOINED: | |
e775c0a4 | 1196 | return "Joined"; |
d7259eac DS |
1197 | break; |
1198 | case PIM_UPSTREAM_JOIN_PENDING: | |
e775c0a4 | 1199 | return "JoinPending"; |
d7259eac DS |
1200 | break; |
1201 | case PIM_UPSTREAM_PRUNE: | |
1202 | return "Prune"; | |
1203 | break; | |
1204 | } | |
e775c0a4 | 1205 | return "Unknown"; |
d7259eac | 1206 | } |
627ed2a3 DS |
1207 | |
1208 | static int | |
1209 | pim_upstream_register_stop_timer (struct thread *t) | |
1210 | { | |
4df01a4e | 1211 | struct pim_interface *pim_ifp; |
627ed2a3 DS |
1212 | struct pim_upstream *up; |
1213 | struct pim_rpf *rpg; | |
1214 | struct ip ip_hdr; | |
627ed2a3 DS |
1215 | up = THREAD_ARG (t); |
1216 | ||
1217 | up->t_rs_timer = NULL; | |
1218 | ||
1219 | if (PIM_DEBUG_TRACE) | |
1220 | { | |
d5ed8a9c | 1221 | zlog_debug ("%s: (S,G)=%s upstream register stop timer %s", |
8bfb8b67 | 1222 | __PRETTY_FUNCTION__, up->sg_str, |
c9802954 | 1223 | pim_upstream_state2str(up->join_state)); |
627ed2a3 DS |
1224 | } |
1225 | ||
1226 | switch (up->join_state) | |
1227 | { | |
1228 | case PIM_UPSTREAM_JOIN_PENDING: | |
1229 | up->join_state = PIM_UPSTREAM_JOINED; | |
bb027ee8 DS |
1230 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); |
1231 | break; | |
1232 | case PIM_UPSTREAM_JOINED: | |
627ed2a3 DS |
1233 | break; |
1234 | case PIM_UPSTREAM_PRUNE: | |
4df01a4e | 1235 | pim_ifp = up->rpf.source_nexthop.interface->info; |
7ef66046 DS |
1236 | if (!pim_ifp) |
1237 | { | |
1238 | if (PIM_DEBUG_TRACE) | |
1239 | zlog_debug ("%s: Interface: %s is not configured for pim", | |
1240 | __PRETTY_FUNCTION__, up->rpf.source_nexthop.interface->name); | |
1241 | return 0; | |
1242 | } | |
627ed2a3 DS |
1243 | up->join_state = PIM_UPSTREAM_JOIN_PENDING; |
1244 | pim_upstream_start_register_stop_timer (up, 1); | |
1245 | ||
70e7fda8 DS |
1246 | if (((up->channel_oil->cc.lastused/100) > PIM_KEEPALIVE_PERIOD) && |
1247 | (I_am_RP (up->sg.grp))) | |
1248 | { | |
1249 | if (PIM_DEBUG_TRACE) | |
1250 | zlog_debug ("%s: Stop sending the register, because I am the RP and we haven't seen a packet in a while", __PRETTY_FUNCTION__); | |
1251 | return 0; | |
1252 | } | |
4ed0af70 | 1253 | rpg = RP (up->sg.grp); |
627ed2a3 DS |
1254 | memset (&ip_hdr, 0, sizeof (struct ip)); |
1255 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
1256 | ip_hdr.ip_hl = 5; | |
1257 | ip_hdr.ip_v = 4; | |
4ed0af70 DS |
1258 | ip_hdr.ip_src = up->sg.src; |
1259 | ip_hdr.ip_dst = up->sg.grp; | |
dc686f82 | 1260 | ip_hdr.ip_len = htons (20); |
627ed2a3 | 1261 | // checksum is broken |
4df01a4e | 1262 | pim_register_send ((uint8_t *)&ip_hdr, sizeof (struct ip), |
0e3b3d5d | 1263 | pim_ifp->primary_address, rpg, 1, up); |
627ed2a3 DS |
1264 | break; |
1265 | default: | |
1266 | break; | |
1267 | } | |
1268 | ||
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | void | |
1273 | pim_upstream_start_register_stop_timer (struct pim_upstream *up, int null_register) | |
1274 | { | |
1275 | uint32_t time; | |
1276 | ||
1277 | if (up->t_rs_timer) | |
1278 | { | |
1279 | THREAD_TIMER_OFF (up->t_rs_timer); | |
1280 | up->t_rs_timer = NULL; | |
1281 | } | |
1282 | ||
1283 | if (!null_register) | |
1284 | { | |
1285 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1286 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1287 | time = lower + (random () % (upper - lower + 1)) - PIM_REGISTER_PROBE_PERIOD; | |
1288 | } | |
1289 | else | |
1290 | time = PIM_REGISTER_PROBE_PERIOD; | |
1291 | ||
1292 | if (PIM_DEBUG_TRACE) | |
1293 | { | |
05e451f8 | 1294 | zlog_debug ("%s: (S,G)=%s Starting upstream register stop timer %d", |
8bfb8b67 | 1295 | __PRETTY_FUNCTION__, up->sg_str, time); |
627ed2a3 DS |
1296 | } |
1297 | THREAD_TIMER_ON (master, up->t_rs_timer, | |
1298 | pim_upstream_register_stop_timer, | |
1299 | up, time); | |
1300 | } | |
4fdc8f36 | 1301 | |
4fdc8f36 | 1302 | int |
b5183fd1 | 1303 | pim_upstream_inherited_olist_decide (struct pim_upstream *up) |
4fdc8f36 | 1304 | { |
219e0013 | 1305 | struct pim_interface *pim_ifp; |
219e0013 DS |
1306 | struct listnode *chnextnode; |
1307 | struct pim_ifchannel *ch; | |
1308 | struct listnode *chnode; | |
219e0013 DS |
1309 | int output_intf = 0; |
1310 | ||
3667b0bc | 1311 | pim_ifp = up->rpf.source_nexthop.interface->info; |
da55afba | 1312 | if (pim_ifp && !up->channel_oil) |
3667b0bc | 1313 | up->channel_oil = pim_channel_oil_add (&up->sg, pim_ifp->mroute_vif_index); |
219e0013 | 1314 | |
ea4a71fc | 1315 | for (ALL_LIST_ELEMENTS (pim_ifchannel_list, chnode, chnextnode, ch)) |
219e0013 | 1316 | { |
ea4a71fc | 1317 | pim_ifp = ch->interface->info; |
7a3ddda5 DS |
1318 | if (!pim_ifp) |
1319 | continue; | |
219e0013 | 1320 | |
ea4a71fc | 1321 | if (pim_upstream_evaluate_join_desired_interface (up, ch)) |
7a3ddda5 | 1322 | { |
781a1745 DS |
1323 | int flag = PIM_OIF_FLAG_PROTO_PIM; |
1324 | ||
1325 | if (ch->sg.src.s_addr == INADDR_ANY && ch->upstream != up) | |
1326 | flag = PIM_OIF_FLAG_PROTO_STAR; | |
1327 | pim_channel_add_oif (up->channel_oil, ch->interface, flag); | |
ea4a71fc | 1328 | output_intf++; |
219e0013 DS |
1329 | } |
1330 | } | |
1331 | ||
b5183fd1 DS |
1332 | return output_intf; |
1333 | } | |
1334 | ||
1335 | /* | |
1336 | * For a given upstream, determine the inherited_olist | |
1337 | * and apply it. | |
1338 | * | |
1339 | * inherited_olist(S,G,rpt) = | |
1340 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1341 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1342 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1343 | * | |
1344 | * inherited_olist(S,G) = | |
1345 | * inherited_olist(S,G,rpt) (+) | |
1346 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1347 | * | |
1348 | * return 1 if there are any output interfaces | |
1349 | * return 0 if there are not any output interfaces | |
1350 | */ | |
1351 | int | |
1352 | pim_upstream_inherited_olist (struct pim_upstream *up) | |
1353 | { | |
1354 | int output_intf = pim_upstream_inherited_olist_decide (up); | |
1355 | ||
483eef9d DS |
1356 | /* |
1357 | * If we have output_intf switch state to Join and work like normal | |
1358 | * If we don't have an output_intf that means we are probably a | |
1359 | * switch on a stick so turn on forwarding to just accept the | |
1360 | * incoming packets so we don't bother the other stuff! | |
1361 | */ | |
1362 | if (output_intf) | |
1363 | pim_upstream_switch (up, PIM_UPSTREAM_JOINED); | |
1364 | else | |
1365 | forward_on (up); | |
219e0013 DS |
1366 | |
1367 | return output_intf; | |
4fdc8f36 | 1368 | } |
d3dd1804 | 1369 | |
80d9c3a0 DS |
1370 | int |
1371 | pim_upstream_empty_inherited_olist (struct pim_upstream *up) | |
1372 | { | |
ce0ddb4e | 1373 | return pim_channel_oil_empty (up->channel_oil); |
80d9c3a0 DS |
1374 | } |
1375 | ||
d3dd1804 DS |
1376 | /* |
1377 | * When we have a new neighbor, | |
1378 | * find upstreams that don't have their rpf_addr | |
1379 | * set and see if the new neighbor allows | |
1380 | * the join to be sent | |
1381 | */ | |
1382 | void | |
1383 | pim_upstream_find_new_rpf (void) | |
1384 | { | |
1385 | struct listnode *up_node; | |
1386 | struct listnode *up_nextnode; | |
1387 | struct pim_upstream *up; | |
1388 | ||
1389 | /* | |
0f588989 DS |
1390 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr |
1391 | */ | |
1392 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) | |
d3dd1804 | 1393 | { |
63c59d0c | 1394 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) |
d3dd1804 | 1395 | { |
3197cb1e | 1396 | if (PIM_DEBUG_TRACE) |
d3dd1804 | 1397 | zlog_debug ("Upstream %s without a path to send join, checking", |
8bfb8b67 | 1398 | up->sg_str); |
d3dd1804 DS |
1399 | pim_rpf_update (up, NULL); |
1400 | } | |
1401 | } | |
1402 | } | |
0f588989 | 1403 | |
0f588989 DS |
1404 | static unsigned int |
1405 | pim_upstream_hash_key (void *arg) | |
1406 | { | |
1407 | struct pim_upstream *up = (struct pim_upstream *)arg; | |
1408 | ||
1409 | return jhash_2words (up->sg.src.s_addr, up->sg.grp.s_addr, 0); | |
1410 | } | |
1411 | ||
1412 | void pim_upstream_terminate (void) | |
1413 | { | |
1414 | if (pim_upstream_list) | |
693c9259 | 1415 | list_delete (pim_upstream_list); |
0f588989 DS |
1416 | pim_upstream_list = NULL; |
1417 | ||
1418 | if (pim_upstream_hash) | |
1419 | hash_free (pim_upstream_hash); | |
693c9259 | 1420 | pim_upstream_hash = NULL; |
0f588989 DS |
1421 | } |
1422 | ||
1423 | static int | |
1424 | pim_upstream_equal (const void *arg1, const void *arg2) | |
1425 | { | |
1426 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; | |
1427 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
1428 | ||
1429 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) && | |
1430 | (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
1431 | return 1; | |
1432 | ||
1433 | return 0; | |
1434 | } | |
1435 | ||
1bf16443 | 1436 | /* rfc4601:section-4.2:"Data Packet Forwarding Rules" defines |
1437 | * the cases where kat has to be restarted on rxing traffic - | |
1438 | * | |
1439 | * if( DirectlyConnected(S) == TRUE AND iif == RPF_interface(S) ) { | |
1440 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1441 | * # Note: a register state transition or UpstreamJPState(S,G) | |
1442 | * # transition may happen as a result of restarting | |
1443 | * # KeepaliveTimer, and must be dealt with here. | |
1444 | * } | |
1445 | * if( iif == RPF_interface(S) AND UpstreamJPState(S,G) == Joined AND | |
1446 | * inherited_olist(S,G) != NULL ) { | |
1447 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1448 | * } | |
1449 | */ | |
1450 | static bool pim_upstream_kat_start_ok(struct pim_upstream *up) | |
1451 | { | |
1452 | /* "iif == RPF_interface(S)" check has to be done by the kernel or hw | |
1453 | * so we will skip that here */ | |
1454 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1455 | up->sg.src)) { | |
1456 | return true; | |
1457 | } | |
1458 | ||
1459 | if ((up->join_state == PIM_UPSTREAM_JOINED) && | |
1460 | !pim_upstream_empty_inherited_olist(up)) { | |
1461 | /* XXX: I have added this RP check just for 3.2 and it's a digression from | |
1462 | * what rfc-4601 says. Till now we were only running KAT on FHR and RP and | |
1463 | * there is some angst around making the change to run it all routers that | |
1464 | * maintain the (S, G) state. This is tracked via CM-13601 and MUST be | |
1465 | * removed to handle spt turn-arounds correctly in a 3-tier clos */ | |
1466 | if (I_am_RP (up->sg.grp)) | |
1467 | return true; | |
1468 | } | |
1469 | ||
1470 | return false; | |
1471 | } | |
1472 | ||
9c5e4d62 DS |
1473 | /* |
1474 | * Code to check and see if we've received packets on a S,G mroute | |
1475 | * and if so to set the SPT bit appropriately | |
1476 | */ | |
1477 | static void | |
1478 | pim_upstream_sg_running (void *arg) | |
1479 | { | |
1480 | struct pim_upstream *up = (struct pim_upstream *)arg; | |
e43b8697 DS |
1481 | |
1482 | // No packet can have arrived here if this is the case | |
1483 | if (!up->channel_oil || !up->channel_oil->installed) | |
1484 | { | |
1485 | if (PIM_DEBUG_TRACE) | |
1486 | zlog_debug ("%s: %s is not installed in mroute", | |
8bfb8b67 | 1487 | __PRETTY_FUNCTION__, up->sg_str); |
e43b8697 DS |
1488 | return; |
1489 | } | |
1490 | ||
bfdf4096 DS |
1491 | /* |
1492 | * This is a bit of a hack | |
1493 | * We've noted that we should rescan but | |
1494 | * we've missed the window for doing so in | |
1495 | * pim_zebra.c for some reason. I am | |
1496 | * only doing this at this point in time | |
1497 | * to get us up and working for the moment | |
1498 | */ | |
1499 | if (up->channel_oil->oil_inherited_rescan) | |
1500 | { | |
1501 | if (PIM_DEBUG_TRACE) | |
1502 | zlog_debug ("%s: Handling unscanned inherited_olist for %s", __PRETTY_FUNCTION__, up->sg_str); | |
1503 | pim_upstream_inherited_olist_decide (up); | |
1504 | up->channel_oil->oil_inherited_rescan = 0; | |
1505 | } | |
e43b8697 DS |
1506 | pim_mroute_update_counters (up->channel_oil); |
1507 | ||
1508 | // Have we seen packets? | |
1bf16443 | 1509 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) && |
e43b8697 DS |
1510 | (up->channel_oil->cc.lastused/100 > 30)) |
1511 | { | |
1512 | if (PIM_DEBUG_TRACE) | |
1513 | { | |
eeedae06 DS |
1514 | zlog_debug ("%s: %s old packet count is equal or lastused is greater than 30, (%ld,%ld,%lld)", |
1515 | __PRETTY_FUNCTION__, up->sg_str, | |
1516 | up->channel_oil->cc.oldpktcnt, | |
1517 | up->channel_oil->cc.pktcnt, | |
1518 | up->channel_oil->cc.lastused/100); | |
e43b8697 DS |
1519 | } |
1520 | return; | |
1521 | } | |
1522 | ||
1bf16443 | 1523 | if (pim_upstream_kat_start_ok(up)) { |
1524 | /* Add a source reference to the stream if | |
1525 | * one doesn't already exist */ | |
1526 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) | |
1527 | { | |
1528 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 DS |
1529 | zlog_debug ("source reference created on kat restart %s", up->sg_str); |
1530 | ||
1bf16443 | 1531 | pim_upstream_ref(up, PIM_UPSTREAM_FLAG_MASK_SRC_STREAM); |
1532 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); | |
1533 | pim_upstream_fhr_kat_start(up); | |
1534 | } | |
1535 | pim_upstream_keep_alive_timer_start(up, qpim_keep_alive_time); | |
1536 | } | |
1537 | ||
1538 | if (up->sptbit != PIM_UPSTREAM_SPTBIT_TRUE) | |
1539 | { | |
1540 | pim_upstream_set_sptbit(up, up->rpf.source_nexthop.interface); | |
1541 | } | |
e43b8697 | 1542 | return; |
9c5e4d62 DS |
1543 | } |
1544 | ||
040d86ad DS |
1545 | void |
1546 | pim_upstream_init (void) | |
0f588989 | 1547 | { |
9c5e4d62 DS |
1548 | pim_upstream_sg_wheel = wheel_init (master, 31000, 100, |
1549 | pim_upstream_hash_key, | |
1550 | pim_upstream_sg_running); | |
0f588989 DS |
1551 | pim_upstream_hash = hash_create_size (8192, pim_upstream_hash_key, |
1552 | pim_upstream_equal); | |
1553 | ||
1554 | pim_upstream_list = list_new (); | |
1555 | pim_upstream_list->del = (void (*)(void *)) pim_upstream_free; | |
03417ccd | 1556 | pim_upstream_list->cmp = pim_upstream_compare; |
0f588989 DS |
1557 | |
1558 | } |