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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 | ||
f14248dd | 169 | THREAD_OFF(up->t_ka_timer); |
792f4d29 | 170 | THREAD_OFF(up->t_rs_timer); |
1bf16443 | 171 | THREAD_OFF(up->t_msdp_reg_timer); |
12e41d03 | 172 | |
7667c556 | 173 | if (up->join_state == PIM_UPSTREAM_JOINED) { |
982bff89 DS |
174 | pim_jp_agg_single_upstream_send (&up->rpf, up, 0); |
175 | ||
7667c556 | 176 | if (up->sg.src.s_addr == INADDR_ANY) { |
177 | /* if a (*, G) entry in the joined state is being deleted we | |
178 | * need to notify MSDP */ | |
179 | notify_msdp = true; | |
180 | } | |
181 | } | |
182 | ||
fc9d070d DS |
183 | join_timer_stop(up); |
184 | up->rpf.source_nexthop.interface = NULL; | |
185 | ||
36e466fe | 186 | if (up->sg.src.s_addr != INADDR_ANY) { |
9c5e4d62 | 187 | wheel_remove_item (pim_upstream_sg_wheel, up); |
36e466fe | 188 | notify_msdp = true; |
189 | } | |
9c5e4d62 | 190 | |
cfa91a87 | 191 | pim_upstream_remove_children (up); |
6a78764e | 192 | pim_mroute_del (up->channel_oil, __PRETTY_FUNCTION__); |
12e41d03 DL |
193 | upstream_channel_oil_detach(up); |
194 | ||
03417ccd DS |
195 | if (up->sources) |
196 | list_delete (up->sources); | |
197 | up->sources = NULL; | |
198 | ||
12e41d03 DL |
199 | /* |
200 | notice that listnode_delete() can't be moved | |
201 | into pim_upstream_free() because the later is | |
202 | called by list_delete_all_node() | |
203 | */ | |
03417ccd DS |
204 | if (up->parent) |
205 | { | |
206 | listnode_delete (up->parent->sources, up); | |
207 | up->parent = NULL; | |
208 | } | |
0f588989 DS |
209 | listnode_delete (pim_upstream_list, up); |
210 | hash_release (pim_upstream_hash, up); | |
12e41d03 | 211 | |
7667c556 | 212 | if (notify_msdp) { |
36e466fe | 213 | pim_msdp_up_del(&up->sg); |
7667c556 | 214 | } |
12e41d03 DL |
215 | pim_upstream_free(up); |
216 | } | |
217 | ||
56638739 DS |
218 | void |
219 | pim_upstream_send_join (struct pim_upstream *up) | |
12e41d03 | 220 | { |
3197cb1e | 221 | if (PIM_DEBUG_TRACE) { |
eaa54bdb | 222 | char rpf_str[PREFIX_STRLEN]; |
63c59d0c | 223 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 224 | zlog_debug ("%s: RPF'%s=%s(%s) for Interface %s", __PRETTY_FUNCTION__, |
8bfb8b67 | 225 | up->sg_str, rpf_str, pim_upstream_state2str (up->join_state), |
56638739 | 226 | up->rpf.source_nexthop.interface->name); |
63c59d0c | 227 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { |
05e451f8 | 228 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", |
56638739 | 229 | __PRETTY_FUNCTION__, |
8bfb8b67 | 230 | up->sg_str, rpf_str); |
12e41d03 DL |
231 | /* warning only */ |
232 | } | |
233 | } | |
56638739 | 234 | |
12e41d03 | 235 | /* send Join(S,G) to the current upstream neighbor */ |
982bff89 | 236 | pim_jp_agg_single_upstream_send(&up->rpf, up, 1 /* join */); |
12e41d03 DL |
237 | } |
238 | ||
239 | static int on_join_timer(struct thread *t) | |
240 | { | |
241 | struct pim_upstream *up; | |
242 | ||
12e41d03 | 243 | up = THREAD_ARG(t); |
12e41d03 | 244 | |
bb6e291f DS |
245 | up->t_join_timer = NULL; |
246 | ||
247 | /* | |
248 | * In the case of a HFR we will not ahve anyone to send this to. | |
249 | */ | |
0bf27c5c | 250 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
bb6e291f DS |
251 | return 0; |
252 | ||
eb345962 DS |
253 | /* |
254 | * Don't send the join if the outgoing interface is a loopback | |
255 | * But since this might change leave the join timer running | |
256 | */ | |
fc9d070d DS |
257 | if (up->rpf.source_nexthop.interface && |
258 | !if_is_loopback (up->rpf.source_nexthop.interface)) | |
eb345962 | 259 | pim_upstream_send_join (up); |
12e41d03 | 260 | |
12e41d03 DL |
261 | join_timer_start(up); |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
982bff89 | 266 | static void join_timer_stop(struct pim_upstream *up) |
12e41d03 | 267 | { |
982bff89 DS |
268 | struct pim_neighbor *nbr; |
269 | ||
270 | nbr = pim_neighbor_find (up->rpf.source_nexthop.interface, | |
271 | up->rpf.rpf_addr.u.prefix4); | |
272 | ||
273 | if (nbr) | |
274 | pim_jp_agg_remove_group (nbr->upstream_jp_agg, up); | |
275 | ||
276 | THREAD_OFF (up->t_join_timer); | |
277 | } | |
278 | ||
279 | void | |
280 | join_timer_start(struct pim_upstream *up) | |
281 | { | |
fc9d070d | 282 | struct pim_neighbor *nbr = NULL; |
982bff89 | 283 | |
fc9d070d DS |
284 | if (up->rpf.source_nexthop.interface) |
285 | { | |
286 | nbr = pim_neighbor_find (up->rpf.source_nexthop.interface, | |
287 | up->rpf.rpf_addr.u.prefix4); | |
288 | ||
289 | if (PIM_DEBUG_PIM_EVENTS) { | |
290 | zlog_debug("%s: starting %d sec timer for upstream (S,G)=%s", | |
291 | __PRETTY_FUNCTION__, | |
292 | qpim_t_periodic, | |
293 | up->sg_str); | |
294 | } | |
295 | } | |
12e41d03 | 296 | |
982bff89 DS |
297 | if (nbr) |
298 | pim_jp_agg_add_group (nbr->upstream_jp_agg, up, 1); | |
299 | else | |
300 | { | |
301 | THREAD_OFF (up->t_join_timer); | |
302 | THREAD_TIMER_ON(master, up->t_join_timer, | |
303 | on_join_timer, | |
304 | up, qpim_t_periodic); | |
305 | } | |
12e41d03 DL |
306 | } |
307 | ||
982bff89 DS |
308 | /* |
309 | * This is only called when we are switching the upstream | |
310 | * J/P from one neighbor to another | |
311 | * | |
312 | * As such we need to remove from the old list and | |
313 | * add to the new list. | |
314 | */ | |
315 | void pim_upstream_join_timer_restart(struct pim_upstream *up, struct pim_rpf *old) | |
12e41d03 | 316 | { |
982bff89 DS |
317 | struct pim_neighbor *nbr; |
318 | ||
319 | nbr = pim_neighbor_find (old->source_nexthop.interface, | |
320 | old->rpf_addr.u.prefix4); | |
321 | if (nbr) | |
322 | pim_jp_agg_remove_group (nbr->upstream_jp_agg, up); | |
323 | ||
324 | //THREAD_OFF(up->t_join_timer); | |
12e41d03 DL |
325 | join_timer_start(up); |
326 | } | |
327 | ||
328 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
329 | int interval_msec) | |
330 | { | |
331 | if (PIM_DEBUG_PIM_EVENTS) { | |
05e451f8 | 332 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", |
12e41d03 DL |
333 | __PRETTY_FUNCTION__, |
334 | interval_msec, | |
8bfb8b67 | 335 | up->sg_str); |
12e41d03 DL |
336 | } |
337 | ||
338 | THREAD_OFF(up->t_join_timer); | |
339 | THREAD_TIMER_MSEC_ON(master, up->t_join_timer, | |
340 | on_join_timer, | |
341 | up, interval_msec); | |
342 | } | |
343 | ||
344 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
345 | struct in_addr rpf_addr, | |
346 | int holdtime) | |
347 | { | |
348 | long t_joinsuppress_msec; | |
349 | long join_timer_remain_msec; | |
350 | ||
351 | t_joinsuppress_msec = MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
352 | 1000 * holdtime); | |
353 | ||
354 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
355 | ||
3197cb1e | 356 | if (PIM_DEBUG_TRACE) { |
eaa54bdb | 357 | char rpf_str[INET_ADDRSTRLEN]; |
12e41d03 | 358 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 359 | zlog_debug("%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", |
12e41d03 | 360 | __FILE__, __PRETTY_FUNCTION__, |
8bfb8b67 | 361 | up->sg_str, |
12e41d03 DL |
362 | rpf_str, |
363 | join_timer_remain_msec, t_joinsuppress_msec); | |
364 | } | |
365 | ||
366 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
3197cb1e | 367 | if (PIM_DEBUG_TRACE) { |
05e451f8 | 368 | zlog_debug("%s %s: suppressing Join(S,G)=%s for %ld msec", |
12e41d03 | 369 | __FILE__, __PRETTY_FUNCTION__, |
8bfb8b67 | 370 | up->sg_str, t_joinsuppress_msec); |
12e41d03 DL |
371 | } |
372 | ||
373 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
374 | } | |
375 | } | |
376 | ||
377 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
c48a612c | 378 | struct pim_upstream *up) |
12e41d03 DL |
379 | { |
380 | long join_timer_remain_msec; | |
381 | int t_override_msec; | |
382 | ||
383 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
384 | t_override_msec = pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
385 | ||
3197cb1e | 386 | if (PIM_DEBUG_TRACE) { |
eaa54bdb | 387 | char rpf_str[INET_ADDRSTRLEN]; |
c48a612c | 388 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr.u.prefix4, rpf_str, sizeof(rpf_str)); |
05e451f8 | 389 | zlog_debug("%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", |
12e41d03 | 390 | debug_label, |
8bfb8b67 | 391 | up->sg_str, rpf_str, |
12e41d03 DL |
392 | join_timer_remain_msec, t_override_msec); |
393 | } | |
394 | ||
395 | if (join_timer_remain_msec > t_override_msec) { | |
3197cb1e | 396 | if (PIM_DEBUG_TRACE) { |
05e451f8 | 397 | zlog_debug("%s: decreasing (S,G)=%s join timer to t_override=%d msec", |
12e41d03 | 398 | debug_label, |
8bfb8b67 | 399 | up->sg_str, |
12e41d03 DL |
400 | t_override_msec); |
401 | } | |
402 | ||
403 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
404 | } | |
405 | } | |
406 | ||
407 | static void forward_on(struct pim_upstream *up) | |
408 | { | |
12e41d03 DL |
409 | struct listnode *chnode; |
410 | struct listnode *chnextnode; | |
12e41d03 DL |
411 | struct pim_interface *pim_ifp; |
412 | struct pim_ifchannel *ch; | |
413 | ||
ea4a71fc DS |
414 | /* scan (S,G) state */ |
415 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
416 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
417 | if (!pim_ifp) |
418 | continue; | |
419 | ||
ea4a71fc DS |
420 | if (ch->upstream != up) |
421 | continue; | |
12e41d03 | 422 | |
ea4a71fc DS |
423 | if (pim_macro_chisin_oiflist(ch)) |
424 | pim_forward_start(ch); | |
12e41d03 | 425 | |
ea4a71fc | 426 | } /* scan iface channel list */ |
12e41d03 DL |
427 | } |
428 | ||
429 | static void forward_off(struct pim_upstream *up) | |
430 | { | |
12e41d03 DL |
431 | struct listnode *chnode; |
432 | struct listnode *chnextnode; | |
12e41d03 DL |
433 | struct pim_interface *pim_ifp; |
434 | struct pim_ifchannel *ch; | |
435 | ||
ea4a71fc DS |
436 | /* scan per-interface (S,G) state */ |
437 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
438 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
439 | if (!pim_ifp) |
440 | continue; | |
441 | ||
ea4a71fc DS |
442 | if (ch->upstream != up) |
443 | continue; | |
12e41d03 | 444 | |
ea4a71fc | 445 | pim_forward_stop(ch); |
12e41d03 | 446 | |
ea4a71fc | 447 | } /* scan iface channel list */ |
12e41d03 DL |
448 | } |
449 | ||
bb6e291f DS |
450 | static int |
451 | pim_upstream_could_register (struct pim_upstream *up) | |
452 | { | |
453 | struct pim_interface *pim_ifp = up->rpf.source_nexthop.interface->info; | |
454 | ||
35917570 | 455 | if (pim_ifp && PIM_I_am_DR (pim_ifp) && |
bb6e291f DS |
456 | pim_if_connected_to_source (up->rpf.source_nexthop.interface, up->sg.src)) |
457 | return 1; | |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
7fcdfb34 DS |
462 | void |
463 | pim_upstream_switch(struct pim_upstream *up, | |
464 | enum pim_upstream_state new_state) | |
12e41d03 DL |
465 | { |
466 | enum pim_upstream_state old_state = up->join_state; | |
467 | ||
12e41d03 | 468 | if (PIM_DEBUG_PIM_EVENTS) { |
c9802954 | 469 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", |
12e41d03 | 470 | __PRETTY_FUNCTION__, |
8bfb8b67 | 471 | up->sg_str, |
c9802954 DS |
472 | pim_upstream_state2str (up->join_state), |
473 | pim_upstream_state2str (new_state)); | |
12e41d03 DL |
474 | } |
475 | ||
bb027ee8 DS |
476 | /* |
477 | * This code still needs work. | |
478 | */ | |
479 | switch (up->join_state) | |
480 | { | |
481 | case PIM_UPSTREAM_PRUNE: | |
0bf27c5c | 482 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
7747bad6 DS |
483 | { |
484 | up->join_state = new_state; | |
485 | up->state_transition = pim_time_monotonic_sec (); | |
486 | } | |
487 | break; | |
bb027ee8 DS |
488 | case PIM_UPSTREAM_JOIN_PENDING: |
489 | break; | |
490 | case PIM_UPSTREAM_NOTJOINED: | |
491 | case PIM_UPSTREAM_JOINED: | |
492 | up->join_state = new_state; | |
e5b6b229 DS |
493 | if (old_state != new_state) |
494 | up->state_transition = pim_time_monotonic_sec(); | |
bb027ee8 DS |
495 | |
496 | break; | |
497 | } | |
498 | ||
12e41d03 DL |
499 | pim_upstream_update_assert_tracking_desired(up); |
500 | ||
501 | if (new_state == PIM_UPSTREAM_JOINED) { | |
81900c5a DS |
502 | if (old_state != PIM_UPSTREAM_JOINED) |
503 | { | |
0bf27c5c | 504 | int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags); |
81900c5a | 505 | forward_on(up); |
7667c556 | 506 | pim_msdp_up_join_state_changed(up); |
0bf27c5c | 507 | if (pim_upstream_could_register (up)) |
bb6e291f | 508 | { |
0bf27c5c | 509 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); |
a9b59879 | 510 | if (!old_fhr && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) |
bb6e291f | 511 | { |
e0e127b0 | 512 | up->reg_state = PIM_UPSTREAM_JOINED; |
bb6e291f DS |
513 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); |
514 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
515 | } | |
516 | } | |
517 | else | |
518 | { | |
519 | pim_upstream_send_join (up); | |
520 | join_timer_start (up); | |
521 | } | |
81900c5a DS |
522 | } |
523 | else | |
524 | { | |
525 | forward_on (up); | |
526 | } | |
12e41d03 DL |
527 | } |
528 | else { | |
982bff89 | 529 | |
12e41d03 | 530 | forward_off(up); |
7667c556 | 531 | if (old_state == PIM_UPSTREAM_JOINED) |
532 | pim_msdp_up_join_state_changed(up); | |
982bff89 DS |
533 | |
534 | pim_jp_agg_single_upstream_send(&up->rpf, up, 0 /* prune */); | |
535 | join_timer_stop(up); | |
12e41d03 | 536 | } |
12e41d03 DL |
537 | } |
538 | ||
03417ccd DS |
539 | static int |
540 | pim_upstream_compare (void *arg1, void *arg2) | |
541 | { | |
542 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; | |
543 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
544 | ||
545 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) | |
546 | return -1; | |
547 | ||
548 | if (ntohl(up1->sg.grp.s_addr) > ntohl(up2->sg.grp.s_addr)) | |
549 | return 1; | |
550 | ||
551 | if (ntohl(up1->sg.src.s_addr) < ntohl(up2->sg.src.s_addr)) | |
552 | return -1; | |
553 | ||
554 | if (ntohl(up1->sg.src.s_addr) > ntohl(up2->sg.src.s_addr)) | |
555 | return 1; | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
07335c8d DS |
560 | static struct pim_upstream * |
561 | pim_upstream_new (struct prefix_sg *sg, | |
562 | struct interface *incoming, | |
563 | int flags) | |
12e41d03 | 564 | { |
2f702571 | 565 | enum pim_rpf_result rpf_result; |
07335c8d DS |
566 | struct pim_interface *pim_ifp; |
567 | struct pim_upstream *up; | |
12e41d03 | 568 | |
36d9e7dc | 569 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); |
12e41d03 | 570 | if (!up) { |
36d9e7dc | 571 | zlog_err("%s: PIM XCALLOC(%zu) failure", |
12e41d03 | 572 | __PRETTY_FUNCTION__, sizeof(*up)); |
8f5f5e91 | 573 | return NULL; |
12e41d03 DL |
574 | } |
575 | ||
5074a423 | 576 | up->sg = *sg; |
8bfb8b67 | 577 | pim_str_sg_set (sg, up->sg_str); |
0f588989 | 578 | up = hash_get (pim_upstream_hash, up, hash_alloc_intern); |
36d6bd7d | 579 | if (!pim_rp_set_upstream_addr (&up->upstream_addr, sg->src, sg->grp)) |
8f5f5e91 | 580 | { |
3197cb1e | 581 | if (PIM_DEBUG_TRACE) |
8f5f5e91 DS |
582 | zlog_debug("%s: Received a (*,G) with no RP configured", __PRETTY_FUNCTION__); |
583 | ||
03417ccd | 584 | hash_release (pim_upstream_hash, up); |
8f5f5e91 DS |
585 | XFREE (MTYPE_PIM_UPSTREAM, up); |
586 | return NULL; | |
587 | } | |
588 | ||
03417ccd DS |
589 | up->parent = pim_upstream_find_parent (up); |
590 | if (up->sg.src.s_addr == INADDR_ANY) | |
591 | { | |
592 | up->sources = list_new (); | |
593 | up->sources->cmp = pim_upstream_compare; | |
594 | } | |
595 | else | |
596 | up->sources = NULL; | |
597 | ||
cfa91a87 | 598 | pim_upstream_find_new_children (up); |
4a40c37a | 599 | up->flags = flags; |
12e41d03 | 600 | up->ref_count = 1; |
4a4c4a07 DS |
601 | up->t_join_timer = NULL; |
602 | up->t_ka_timer = NULL; | |
792f4d29 | 603 | up->t_rs_timer = NULL; |
1bf16443 | 604 | up->t_msdp_reg_timer = NULL; |
12e41d03 | 605 | up->join_state = 0; |
e0e127b0 | 606 | up->reg_state = 0; |
12e41d03 | 607 | up->state_transition = pim_time_monotonic_sec(); |
4a4c4a07 | 608 | up->channel_oil = NULL; |
f9e0ab5b | 609 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; |
12e41d03 | 610 | |
f24405b1 | 611 | up->rpf.source_nexthop.interface = NULL; |
63c59d0c DS |
612 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; |
613 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
12e41d03 DL |
614 | up->rpf.source_nexthop.mrib_metric_preference = qpim_infinite_assert_metric.metric_preference; |
615 | up->rpf.source_nexthop.mrib_route_metric = qpim_infinite_assert_metric.route_metric; | |
63c59d0c DS |
616 | up->rpf.rpf_addr.family = AF_INET; |
617 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
12e41d03 | 618 | |
9c5e4d62 DS |
619 | if (up->sg.src.s_addr != INADDR_ANY) |
620 | wheel_add_item (pim_upstream_sg_wheel, up); | |
621 | ||
d3dd1804 | 622 | rpf_result = pim_rpf_update(up, NULL); |
2f702571 | 623 | if (rpf_result == PIM_RPF_FAILURE) { |
3197cb1e | 624 | if (PIM_DEBUG_TRACE) |
4a40c37a | 625 | zlog_debug ("%s: Attempting to create upstream(%s), Unable to RPF for source", __PRETTY_FUNCTION__, |
8bfb8b67 | 626 | up->sg_str); |
03417ccd DS |
627 | |
628 | if (up->parent) | |
629 | { | |
630 | listnode_delete (up->parent->sources, up); | |
631 | up->parent = NULL; | |
632 | } | |
9c5e4d62 DS |
633 | |
634 | if (up->sg.src.s_addr != INADDR_ANY) | |
635 | wheel_remove_item (pim_upstream_sg_wheel, up); | |
636 | ||
03417ccd DS |
637 | pim_upstream_remove_children (up); |
638 | if (up->sources) | |
639 | list_delete (up->sources); | |
640 | ||
641 | hash_release (pim_upstream_hash, up); | |
2f702571 DS |
642 | XFREE(MTYPE_PIM_UPSTREAM, up); |
643 | return NULL; | |
644 | } | |
12e41d03 | 645 | |
07335c8d DS |
646 | pim_ifp = up->rpf.source_nexthop.interface->info; |
647 | if (pim_ifp) | |
648 | up->channel_oil = pim_channel_oil_add(&up->sg, pim_ifp->mroute_vif_index); | |
649 | ||
0f588989 | 650 | listnode_add_sort(pim_upstream_list, up); |
12e41d03 | 651 | |
3197cb1e | 652 | if (PIM_DEBUG_TRACE) |
8bfb8b67 | 653 | zlog_debug ("%s: Created Upstream %s", __PRETTY_FUNCTION__, up->sg_str); |
03417ccd | 654 | |
12e41d03 DL |
655 | return up; |
656 | } | |
657 | ||
4ed0af70 | 658 | struct pim_upstream *pim_upstream_find(struct prefix_sg *sg) |
12e41d03 | 659 | { |
0f588989 DS |
660 | struct pim_upstream lookup; |
661 | struct pim_upstream *up = NULL; | |
12e41d03 | 662 | |
0f588989 DS |
663 | lookup.sg = *sg; |
664 | up = hash_lookup (pim_upstream_hash, &lookup); | |
665 | return up; | |
12e41d03 DL |
666 | } |
667 | ||
1bf16443 | 668 | static void pim_upstream_ref(struct pim_upstream *up, int flags) |
669 | { | |
670 | up->flags |= flags; | |
671 | ++up->ref_count; | |
672 | } | |
673 | ||
4ed0af70 | 674 | struct pim_upstream *pim_upstream_add(struct prefix_sg *sg, |
4a40c37a | 675 | struct interface *incoming, |
e5905a3b | 676 | int flags, const char *name) |
12e41d03 | 677 | { |
594a78cc | 678 | struct pim_upstream *up = NULL; |
e5905a3b | 679 | int found = 0; |
5074a423 | 680 | up = pim_upstream_find(sg); |
12e41d03 | 681 | if (up) { |
1bf16443 | 682 | pim_upstream_ref(up, flags); |
e5905a3b | 683 | found = 1; |
12e41d03 DL |
684 | } |
685 | else { | |
4a40c37a | 686 | up = pim_upstream_new(sg, incoming, flags); |
12e41d03 DL |
687 | } |
688 | ||
e5905a3b | 689 | if (PIM_DEBUG_TRACE) |
f4075cb4 DS |
690 | { |
691 | if (up) | |
3197cb1e | 692 | zlog_debug("%s(%s): %s, found: %d: ref_count: %d", |
f4075cb4 | 693 | __PRETTY_FUNCTION__, name, |
8bfb8b67 | 694 | up->sg_str, found, |
f4075cb4 DS |
695 | up->ref_count); |
696 | else | |
697 | zlog_debug("%s(%s): (%s) failure to create", | |
698 | __PRETTY_FUNCTION__, name, | |
699 | pim_str_sg_dump (sg)); | |
700 | } | |
12e41d03 | 701 | |
e5905a3b | 702 | return up; |
12e41d03 DL |
703 | } |
704 | ||
9f44d042 | 705 | int |
7a3ddda5 DS |
706 | pim_upstream_evaluate_join_desired_interface (struct pim_upstream *up, |
707 | struct pim_ifchannel *ch) | |
708 | { | |
709 | struct pim_upstream *parent = up->parent; | |
710 | ||
711 | if (ch->upstream == up) | |
712 | { | |
713 | if (!pim_macro_ch_lost_assert(ch) && pim_macro_chisin_joins_or_include(ch)) | |
714 | return 1; | |
46c8aab8 DS |
715 | |
716 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
717 | return 0; | |
7a3ddda5 | 718 | } |
46c8aab8 | 719 | |
7a3ddda5 DS |
720 | /* |
721 | * joins (*,G) | |
722 | */ | |
723 | if (parent && ch->upstream == parent) | |
724 | { | |
725 | if (!pim_macro_ch_lost_assert (ch) && pim_macro_chisin_joins_or_include (ch)) | |
726 | return 1; | |
727 | } | |
728 | ||
729 | return 0; | |
730 | } | |
731 | ||
12e41d03 DL |
732 | /* |
733 | Evaluate JoinDesired(S,G): | |
734 | ||
735 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
736 | in the set: | |
737 | ||
738 | inherited_olist(S,G) = | |
739 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
740 | ||
741 | JoinDesired(S,G) may be affected by changes in the following: | |
742 | ||
743 | pim_ifp->primary_address | |
744 | pim_ifp->pim_dr_addr | |
745 | ch->ifassert_winner_metric | |
746 | ch->ifassert_winner | |
747 | ch->local_ifmembership | |
748 | ch->ifjoin_state | |
749 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
750 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
751 | ch->upstream->rpf.source_nexthop.interface | |
752 | ||
753 | See also pim_upstream_update_join_desired() below. | |
754 | */ | |
755 | int pim_upstream_evaluate_join_desired(struct pim_upstream *up) | |
756 | { | |
12e41d03 DL |
757 | struct listnode *chnode; |
758 | struct listnode *chnextnode; | |
12e41d03 DL |
759 | struct pim_interface *pim_ifp; |
760 | struct pim_ifchannel *ch; | |
7a3ddda5 | 761 | int ret = 0; |
12e41d03 | 762 | |
ea4a71fc DS |
763 | /* scan per-interface (S,G) state */ |
764 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) | |
765 | { | |
766 | pim_ifp = ch->interface->info; | |
767 | if (!pim_ifp) | |
768 | continue; | |
12e41d03 | 769 | |
ea4a71fc DS |
770 | ret += pim_upstream_evaluate_join_desired_interface (up, ch); |
771 | } /* scan iface channel list */ | |
12e41d03 | 772 | |
7a3ddda5 | 773 | return ret; /* false */ |
12e41d03 DL |
774 | } |
775 | ||
776 | /* | |
777 | See also pim_upstream_evaluate_join_desired() above. | |
778 | */ | |
779 | void pim_upstream_update_join_desired(struct pim_upstream *up) | |
780 | { | |
781 | int was_join_desired; /* boolean */ | |
782 | int is_join_desired; /* boolean */ | |
783 | ||
784 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
785 | ||
786 | is_join_desired = pim_upstream_evaluate_join_desired(up); | |
787 | if (is_join_desired) | |
788 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
789 | else | |
790 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
791 | ||
792 | /* switched from false to true */ | |
793 | if (is_join_desired && !was_join_desired) { | |
12e41d03 DL |
794 | pim_upstream_switch(up, PIM_UPSTREAM_JOINED); |
795 | return; | |
796 | } | |
797 | ||
798 | /* switched from true to false */ | |
799 | if (!is_join_desired && was_join_desired) { | |
12e41d03 DL |
800 | pim_upstream_switch(up, PIM_UPSTREAM_NOTJOINED); |
801 | return; | |
802 | } | |
803 | } | |
804 | ||
805 | /* | |
806 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
807 | Transitions from Joined State | |
808 | RPF'(S,G) GenID changes | |
809 | ||
810 | The upstream (S,G) state machine remains in Joined state. If the | |
811 | Join Timer is set to expire in more than t_override seconds, reset | |
812 | it so that it expires after t_override seconds. | |
813 | */ | |
814 | void pim_upstream_rpf_genid_changed(struct in_addr neigh_addr) | |
815 | { | |
816 | struct listnode *up_node; | |
817 | struct listnode *up_nextnode; | |
818 | struct pim_upstream *up; | |
819 | ||
820 | /* | |
0f588989 DS |
821 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr |
822 | */ | |
823 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) { | |
12e41d03 | 824 | |
3197cb1e | 825 | if (PIM_DEBUG_TRACE) { |
eaa54bdb DW |
826 | char neigh_str[INET_ADDRSTRLEN]; |
827 | char rpf_addr_str[PREFIX_STRLEN]; | |
12e41d03 | 828 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, sizeof(neigh_str)); |
63c59d0c | 829 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, sizeof(rpf_addr_str)); |
05e451f8 | 830 | zlog_debug("%s: matching neigh=%s against upstream (S,G)=%s joined=%d rpf_addr=%s", |
12e41d03 | 831 | __PRETTY_FUNCTION__, |
8bfb8b67 | 832 | neigh_str, up->sg_str, |
12e41d03 DL |
833 | up->join_state == PIM_UPSTREAM_JOINED, |
834 | rpf_addr_str); | |
835 | } | |
836 | ||
837 | /* consider only (S,G) upstream in Joined state */ | |
838 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
839 | continue; | |
840 | ||
841 | /* match RPF'(S,G)=neigh_addr */ | |
63c59d0c | 842 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) |
12e41d03 DL |
843 | continue; |
844 | ||
845 | pim_upstream_join_timer_decrease_to_t_override("RPF'(S,G) GenID change", | |
c48a612c | 846 | up); |
12e41d03 DL |
847 | } |
848 | } | |
849 | ||
850 | ||
851 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
852 | struct interface *old_rpf_ifp) | |
853 | { | |
ea4a71fc DS |
854 | struct listnode *chnode; |
855 | struct listnode *chnextnode; | |
856 | struct pim_ifchannel *ch; | |
857 | struct pim_interface *pim_ifp; | |
858 | ||
859 | /* search all ifchannels */ | |
860 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
861 | ||
862 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
863 | if (!pim_ifp) |
864 | continue; | |
865 | ||
ea4a71fc DS |
866 | if (ch->upstream != up) |
867 | continue; | |
12e41d03 | 868 | |
ea4a71fc DS |
869 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { |
870 | if ( | |
871 | /* RPF_interface(S) was NOT I */ | |
872 | (old_rpf_ifp == ch->interface) | |
873 | && | |
874 | /* RPF_interface(S) stopped being I */ | |
875 | (ch->upstream->rpf.source_nexthop.interface != ch->interface) | |
876 | ) { | |
877 | assert_action_a5(ch); | |
878 | } | |
879 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
12e41d03 | 880 | |
ea4a71fc | 881 | pim_ifchannel_update_assert_tracking_desired(ch); |
12e41d03 DL |
882 | } |
883 | } | |
884 | ||
885 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
886 | { | |
12e41d03 DL |
887 | struct listnode *chnode; |
888 | struct listnode *chnextnode; | |
12e41d03 DL |
889 | struct pim_interface *pim_ifp; |
890 | struct pim_ifchannel *ch; | |
891 | ||
ea4a71fc DS |
892 | /* scan per-interface (S,G) state */ |
893 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
894 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
895 | if (!pim_ifp) |
896 | continue; | |
897 | ||
ea4a71fc DS |
898 | if (ch->upstream != up) |
899 | continue; | |
12e41d03 | 900 | |
ea4a71fc DS |
901 | pim_ifchannel_update_could_assert(ch); |
902 | } /* scan iface channel list */ | |
12e41d03 DL |
903 | } |
904 | ||
905 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
906 | { | |
12e41d03 DL |
907 | struct listnode *chnode; |
908 | struct listnode *chnextnode; | |
12e41d03 DL |
909 | struct pim_interface *pim_ifp; |
910 | struct pim_ifchannel *ch; | |
911 | ||
ea4a71fc DS |
912 | /* scan per-interface (S,G) state */ |
913 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
914 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
915 | if (!pim_ifp) |
916 | continue; | |
917 | ||
ea4a71fc DS |
918 | if (ch->upstream != up) |
919 | continue; | |
12e41d03 | 920 | |
ea4a71fc | 921 | pim_ifchannel_update_my_assert_metric(ch); |
12e41d03 | 922 | |
ea4a71fc | 923 | } /* scan iface channel list */ |
12e41d03 DL |
924 | } |
925 | ||
926 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
927 | { | |
12e41d03 DL |
928 | struct listnode *chnode; |
929 | struct listnode *chnextnode; | |
12e41d03 DL |
930 | struct pim_interface *pim_ifp; |
931 | struct pim_ifchannel *ch; | |
932 | ||
ea4a71fc DS |
933 | /* scan per-interface (S,G) state */ |
934 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
935 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
936 | if (!pim_ifp) |
937 | continue; | |
938 | ||
ea4a71fc DS |
939 | if (ch->upstream != up) |
940 | continue; | |
12e41d03 | 941 | |
ea4a71fc | 942 | pim_ifchannel_update_assert_tracking_desired(ch); |
12e41d03 | 943 | |
ea4a71fc | 944 | } /* scan iface channel list */ |
12e41d03 | 945 | } |
f14248dd | 946 | |
1bf16443 | 947 | /* When kat is stopped CouldRegister goes to false so we need to |
948 | * transition the (S, G) on FHR to NI state and remove reg tunnel | |
949 | * from the OIL */ | |
950 | static void pim_upstream_fhr_kat_expiry(struct pim_upstream *up) | |
951 | { | |
952 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) | |
953 | return; | |
954 | ||
955 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 DS |
956 | zlog_debug ("kat expired on %s; clear fhr reg state", up->sg_str); |
957 | ||
1bf16443 | 958 | /* stop reg-stop timer */ |
959 | THREAD_OFF(up->t_rs_timer); | |
960 | /* remove regiface from the OIL if it is there*/ | |
961 | pim_channel_del_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
962 | /* move to "not-joined" */ | |
e0e127b0 | 963 | up->reg_state = PIM_UPSTREAM_NOTJOINED; |
1bf16443 | 964 | PIM_UPSTREAM_FLAG_UNSET_FHR(up->flags); |
965 | } | |
966 | ||
967 | /* When kat is started CouldRegister can go to true. And if it does we | |
968 | * need to transition the (S, G) on FHR to JOINED state and add reg tunnel | |
969 | * to the OIL */ | |
970 | static void pim_upstream_fhr_kat_start(struct pim_upstream *up) | |
971 | { | |
972 | if (pim_upstream_could_register(up)) { | |
973 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 DS |
974 | zlog_debug ("kat started on %s; set fhr reg state to joined", up->sg_str); |
975 | ||
1bf16443 | 976 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); |
e0e127b0 | 977 | if (up->reg_state == PIM_UPSTREAM_NOTJOINED) { |
1bf16443 | 978 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); |
e0e127b0 | 979 | up->reg_state = PIM_UPSTREAM_JOINED; |
1bf16443 | 980 | } |
981 | } | |
982 | } | |
983 | ||
f14248dd DS |
984 | /* |
985 | * On an RP, the PMBR value must be cleared when the | |
986 | * Keepalive Timer expires | |
1bf16443 | 987 | * KAT expiry indicates that flow is inactive. If the flow was created or |
988 | * maintained by activity now is the time to deref it. | |
f14248dd DS |
989 | */ |
990 | static int | |
991 | pim_upstream_keep_alive_timer (struct thread *t) | |
992 | { | |
993 | struct pim_upstream *up; | |
994 | ||
995 | up = THREAD_ARG(t); | |
1bf16443 | 996 | up->t_ka_timer = NULL; |
f14248dd | 997 | |
4ed0af70 | 998 | if (I_am_RP (up->sg.grp)) |
1bf16443 | 999 | { |
1000 | pim_br_clear_pmbr (&up->sg); | |
1001 | /* | |
1002 | * We need to do more here :) | |
1003 | * But this is the start. | |
1004 | */ | |
1005 | } | |
14315ea8 | 1006 | |
1bf16443 | 1007 | /* source is no longer active - pull the SA from MSDP's cache */ |
1008 | pim_msdp_sa_local_del(&up->sg); | |
14315ea8 | 1009 | |
1bf16443 | 1010 | /* if entry was created because of activity we need to deref it */ |
1011 | if (PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) | |
1012 | { | |
1013 | pim_upstream_fhr_kat_expiry(up); | |
1014 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 | 1015 | zlog_debug ("kat expired on %s; remove stream reference", up->sg_str); |
1bf16443 | 1016 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(up->flags); |
1017 | pim_upstream_del(up, __PRETTY_FUNCTION__); | |
1018 | } | |
14315ea8 | 1019 | |
1bf16443 | 1020 | return 0; |
f14248dd DS |
1021 | } |
1022 | ||
f14248dd DS |
1023 | void |
1024 | pim_upstream_keep_alive_timer_start (struct pim_upstream *up, | |
1025 | uint32_t time) | |
1026 | { | |
1bf16443 | 1027 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { |
1028 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 | 1029 | zlog_debug ("kat start on %s with no stream reference", up->sg_str); |
1bf16443 | 1030 | } |
00d2f9e4 | 1031 | THREAD_OFF (up->t_ka_timer); |
f14248dd DS |
1032 | THREAD_TIMER_ON (master, |
1033 | up->t_ka_timer, | |
1034 | pim_upstream_keep_alive_timer, | |
1035 | up, time); | |
1bf16443 | 1036 | |
1037 | /* any time keepalive is started against a SG we will have to | |
1038 | * re-evaluate our active source database */ | |
1039 | pim_msdp_sa_local_update(up); | |
1040 | } | |
1041 | ||
1042 | /* MSDP on RP needs to know if a source is registerable to this RP */ | |
1043 | static int | |
1044 | pim_upstream_msdp_reg_timer(struct thread *t) | |
1045 | { | |
1046 | struct pim_upstream *up; | |
1047 | ||
1048 | up = THREAD_ARG(t); | |
1049 | up->t_msdp_reg_timer = NULL; | |
1050 | ||
1051 | /* source is no longer active - pull the SA from MSDP's cache */ | |
1052 | pim_msdp_sa_local_del(&up->sg); | |
1053 | return 1; | |
1054 | } | |
1055 | void | |
1056 | pim_upstream_msdp_reg_timer_start(struct pim_upstream *up) | |
1057 | { | |
1058 | THREAD_OFF(up->t_msdp_reg_timer); | |
1059 | THREAD_TIMER_ON(master, up->t_msdp_reg_timer, | |
1060 | pim_upstream_msdp_reg_timer, up, PIM_MSDP_REG_RXED_PERIOD); | |
1061 | ||
1062 | pim_msdp_sa_local_update(up); | |
f14248dd | 1063 | } |
cb40b272 DS |
1064 | |
1065 | /* | |
1066 | * 4.2.1 Last-Hop Switchover to the SPT | |
1067 | * | |
1068 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
1069 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
1070 | * router, it has the option of switching to receive the traffic on a | |
1071 | * shortest path tree (SPT). | |
1072 | * | |
1073 | * The decision for a router to switch to the SPT is controlled as | |
1074 | * follows: | |
1075 | * | |
1076 | * void | |
1077 | * CheckSwitchToSpt(S,G) { | |
1078 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
1079 | * (+) pim_include(S,G) != NULL ) | |
1080 | * AND SwitchToSptDesired(S,G) ) { | |
1081 | * # Note: Restarting the KAT will result in the SPT switch | |
1082 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1083 | * } | |
1084 | * } | |
1085 | * | |
1086 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
1087 | * defined. An "infinite threshold" policy can be implemented by making | |
1088 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
1089 | * first packet" policy can be implemented by making | |
1090 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
1091 | * received for the source and group. | |
1092 | */ | |
1093 | int | |
4ed0af70 | 1094 | pim_upstream_switch_to_spt_desired (struct prefix_sg *sg) |
cb40b272 | 1095 | { |
4ed0af70 | 1096 | if (I_am_RP (sg->grp)) |
a3b58b4a DS |
1097 | return 1; |
1098 | ||
cb40b272 DS |
1099 | return 0; |
1100 | } | |
d7259eac | 1101 | |
80d9c3a0 DS |
1102 | int |
1103 | pim_upstream_is_sg_rpt (struct pim_upstream *up) | |
1104 | { | |
f21597f0 DS |
1105 | struct listnode *chnode; |
1106 | struct pim_ifchannel *ch; | |
1107 | ||
1108 | for (ALL_LIST_ELEMENTS_RO(pim_ifchannel_list, chnode, ch)) | |
1109 | { | |
1110 | if ((ch->upstream == up) && | |
1111 | (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags))) | |
1112 | return 1; | |
1113 | } | |
e43b8697 | 1114 | |
80d9c3a0 DS |
1115 | return 0; |
1116 | } | |
3a66b17b DS |
1117 | /* |
1118 | * After receiving a packet set SPTbit: | |
1119 | * void | |
1120 | * Update_SPTbit(S,G,iif) { | |
1121 | * if ( iif == RPF_interface(S) | |
1122 | * AND JoinDesired(S,G) == TRUE | |
1123 | * AND ( DirectlyConnected(S) == TRUE | |
1124 | * OR RPF_interface(S) != RPF_interface(RP(G)) | |
1125 | * OR inherited_olist(S,G,rpt) == NULL | |
1126 | * OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1127 | * ( RPF'(S,G) != NULL ) ) | |
1128 | * OR ( I_Am_Assert_Loser(S,G,iif) ) { | |
1129 | * Set SPTbit(S,G) to TRUE | |
1130 | * } | |
1131 | * } | |
1132 | */ | |
1133 | void | |
1134 | pim_upstream_set_sptbit (struct pim_upstream *up, struct interface *incoming) | |
1135 | { | |
1136 | struct pim_rpf *grpf = NULL; | |
1137 | ||
1138 | // iif == RPF_interfvace(S) | |
1139 | if (up->rpf.source_nexthop.interface != incoming) | |
1140 | { | |
1141 | if (PIM_DEBUG_TRACE) | |
1142 | zlog_debug ("%s: Incoming Interface: %s is different than RPF_interface(S) %s", | |
1143 | __PRETTY_FUNCTION__, incoming->name, up->rpf.source_nexthop.interface->name); | |
1144 | return; | |
1145 | } | |
1146 | ||
1147 | // AND JoinDesired(S,G) == TRUE | |
1148 | // FIXME | |
1149 | ||
1150 | // DirectlyConnected(S) == TRUE | |
1151 | if (pim_if_connected_to_source (up->rpf.source_nexthop.interface, up->sg.src)) | |
1152 | { | |
1153 | if (PIM_DEBUG_TRACE) | |
1154 | zlog_debug ("%s: %s is directly connected to the source", __PRETTY_FUNCTION__, | |
8bfb8b67 | 1155 | up->sg_str); |
3a66b17b DS |
1156 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1157 | return; | |
1158 | } | |
1159 | ||
1160 | // OR RPF_interface(S) != RPF_interface(RP(G)) | |
1161 | grpf = RP(up->sg.grp); | |
1162 | if (!grpf || up->rpf.source_nexthop.interface != grpf->source_nexthop.interface) | |
1163 | { | |
1164 | if (PIM_DEBUG_TRACE) | |
1165 | zlog_debug ("%s: %s RPF_interface(S) != RPF_interface(RP(G))", | |
8bfb8b67 | 1166 | __PRETTY_FUNCTION__, up->sg_str); |
3a66b17b DS |
1167 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1168 | return; | |
1169 | } | |
1170 | ||
1171 | // OR inherited_olist(S,G,rpt) == NULL | |
1172 | if (pim_upstream_is_sg_rpt(up) && pim_upstream_empty_inherited_olist(up)) | |
1173 | { | |
1174 | if (PIM_DEBUG_TRACE) | |
1175 | zlog_debug ("%s: %s OR inherited_olist(S,G,rpt) == NULL", __PRETTY_FUNCTION__, | |
8bfb8b67 | 1176 | up->sg_str); |
3a66b17b DS |
1177 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1178 | return; | |
1179 | } | |
1180 | ||
1181 | // OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1182 | // ( RPF'(S,G) != NULL ) ) | |
1183 | if (up->parent && pim_rpf_is_same (&up->rpf, &up->parent->rpf)) | |
1184 | { | |
1185 | if (PIM_DEBUG_TRACE) | |
1186 | zlog_debug ("%s: %s RPF'(S,G) is the same as RPF'(*,G)", __PRETTY_FUNCTION__, | |
8bfb8b67 | 1187 | up->sg_str); |
3a66b17b DS |
1188 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1189 | return; | |
1190 | } | |
1191 | ||
1192 | return; | |
1193 | } | |
80d9c3a0 | 1194 | |
d7259eac | 1195 | const char * |
c9802954 | 1196 | pim_upstream_state2str (enum pim_upstream_state join_state) |
d7259eac | 1197 | { |
c9802954 | 1198 | switch (join_state) |
d7259eac DS |
1199 | { |
1200 | case PIM_UPSTREAM_NOTJOINED: | |
e775c0a4 | 1201 | return "NotJoined"; |
d7259eac DS |
1202 | break; |
1203 | case PIM_UPSTREAM_JOINED: | |
e775c0a4 | 1204 | return "Joined"; |
d7259eac DS |
1205 | break; |
1206 | case PIM_UPSTREAM_JOIN_PENDING: | |
e775c0a4 | 1207 | return "JoinPending"; |
d7259eac DS |
1208 | break; |
1209 | case PIM_UPSTREAM_PRUNE: | |
1210 | return "Prune"; | |
1211 | break; | |
1212 | } | |
e775c0a4 | 1213 | return "Unknown"; |
d7259eac | 1214 | } |
627ed2a3 | 1215 | |
e0e127b0 | 1216 | const char * |
1217 | pim_reg_state2str (enum pim_upstream_state join_state, char *state_str) | |
1218 | { | |
1219 | switch (join_state) | |
1220 | { | |
1221 | case PIM_UPSTREAM_NOTJOINED: | |
1222 | strcpy (state_str, "NoInfo"); | |
1223 | break; | |
1224 | case PIM_UPSTREAM_JOINED: | |
1225 | strcpy (state_str, "Joined"); | |
1226 | break; | |
1227 | case PIM_UPSTREAM_JOIN_PENDING: | |
1228 | strcpy (state_str, "JoinPending"); | |
1229 | break; | |
1230 | case PIM_UPSTREAM_PRUNE: | |
1231 | strcpy (state_str, "Prune"); | |
1232 | break; | |
1233 | default: | |
1234 | strcpy (state_str, "Unknown"); | |
1235 | } | |
1236 | return state_str; | |
1237 | } | |
1238 | ||
627ed2a3 DS |
1239 | static int |
1240 | pim_upstream_register_stop_timer (struct thread *t) | |
1241 | { | |
4df01a4e | 1242 | struct pim_interface *pim_ifp; |
627ed2a3 DS |
1243 | struct pim_upstream *up; |
1244 | struct pim_rpf *rpg; | |
1245 | struct ip ip_hdr; | |
627ed2a3 DS |
1246 | up = THREAD_ARG (t); |
1247 | ||
1248 | up->t_rs_timer = NULL; | |
1249 | ||
1250 | if (PIM_DEBUG_TRACE) | |
1251 | { | |
d5ed8a9c | 1252 | zlog_debug ("%s: (S,G)=%s upstream register stop timer %s", |
8bfb8b67 | 1253 | __PRETTY_FUNCTION__, up->sg_str, |
e0e127b0 | 1254 | pim_upstream_state2str(up->reg_state)); |
627ed2a3 DS |
1255 | } |
1256 | ||
e0e127b0 | 1257 | switch (up->reg_state) |
627ed2a3 DS |
1258 | { |
1259 | case PIM_UPSTREAM_JOIN_PENDING: | |
e0e127b0 | 1260 | up->reg_state = PIM_UPSTREAM_JOINED; |
bb027ee8 DS |
1261 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); |
1262 | break; | |
1263 | case PIM_UPSTREAM_JOINED: | |
627ed2a3 DS |
1264 | break; |
1265 | case PIM_UPSTREAM_PRUNE: | |
4df01a4e | 1266 | pim_ifp = up->rpf.source_nexthop.interface->info; |
7ef66046 DS |
1267 | if (!pim_ifp) |
1268 | { | |
1269 | if (PIM_DEBUG_TRACE) | |
1270 | zlog_debug ("%s: Interface: %s is not configured for pim", | |
1271 | __PRETTY_FUNCTION__, up->rpf.source_nexthop.interface->name); | |
1272 | return 0; | |
1273 | } | |
e0e127b0 | 1274 | up->reg_state = PIM_UPSTREAM_JOIN_PENDING; |
627ed2a3 DS |
1275 | pim_upstream_start_register_stop_timer (up, 1); |
1276 | ||
70e7fda8 DS |
1277 | if (((up->channel_oil->cc.lastused/100) > PIM_KEEPALIVE_PERIOD) && |
1278 | (I_am_RP (up->sg.grp))) | |
1279 | { | |
1280 | if (PIM_DEBUG_TRACE) | |
1281 | zlog_debug ("%s: Stop sending the register, because I am the RP and we haven't seen a packet in a while", __PRETTY_FUNCTION__); | |
1282 | return 0; | |
1283 | } | |
4ed0af70 | 1284 | rpg = RP (up->sg.grp); |
627ed2a3 DS |
1285 | memset (&ip_hdr, 0, sizeof (struct ip)); |
1286 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
1287 | ip_hdr.ip_hl = 5; | |
1288 | ip_hdr.ip_v = 4; | |
4ed0af70 DS |
1289 | ip_hdr.ip_src = up->sg.src; |
1290 | ip_hdr.ip_dst = up->sg.grp; | |
dc686f82 | 1291 | ip_hdr.ip_len = htons (20); |
627ed2a3 | 1292 | // checksum is broken |
4df01a4e | 1293 | pim_register_send ((uint8_t *)&ip_hdr, sizeof (struct ip), |
0e3b3d5d | 1294 | pim_ifp->primary_address, rpg, 1, up); |
627ed2a3 DS |
1295 | break; |
1296 | default: | |
1297 | break; | |
1298 | } | |
1299 | ||
1300 | return 0; | |
1301 | } | |
1302 | ||
1303 | void | |
1304 | pim_upstream_start_register_stop_timer (struct pim_upstream *up, int null_register) | |
1305 | { | |
1306 | uint32_t time; | |
1307 | ||
1308 | if (up->t_rs_timer) | |
1309 | { | |
1310 | THREAD_TIMER_OFF (up->t_rs_timer); | |
1311 | up->t_rs_timer = NULL; | |
1312 | } | |
1313 | ||
1314 | if (!null_register) | |
1315 | { | |
1316 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1317 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1318 | time = lower + (random () % (upper - lower + 1)) - PIM_REGISTER_PROBE_PERIOD; | |
1319 | } | |
1320 | else | |
1321 | time = PIM_REGISTER_PROBE_PERIOD; | |
1322 | ||
1323 | if (PIM_DEBUG_TRACE) | |
1324 | { | |
05e451f8 | 1325 | zlog_debug ("%s: (S,G)=%s Starting upstream register stop timer %d", |
8bfb8b67 | 1326 | __PRETTY_FUNCTION__, up->sg_str, time); |
627ed2a3 DS |
1327 | } |
1328 | THREAD_TIMER_ON (master, up->t_rs_timer, | |
1329 | pim_upstream_register_stop_timer, | |
1330 | up, time); | |
1331 | } | |
4fdc8f36 | 1332 | |
4fdc8f36 | 1333 | int |
b5183fd1 | 1334 | pim_upstream_inherited_olist_decide (struct pim_upstream *up) |
4fdc8f36 | 1335 | { |
219e0013 | 1336 | struct pim_interface *pim_ifp; |
219e0013 DS |
1337 | struct listnode *chnextnode; |
1338 | struct pim_ifchannel *ch; | |
1339 | struct listnode *chnode; | |
219e0013 DS |
1340 | int output_intf = 0; |
1341 | ||
3667b0bc | 1342 | pim_ifp = up->rpf.source_nexthop.interface->info; |
da55afba | 1343 | if (pim_ifp && !up->channel_oil) |
3667b0bc | 1344 | up->channel_oil = pim_channel_oil_add (&up->sg, pim_ifp->mroute_vif_index); |
219e0013 | 1345 | |
ea4a71fc | 1346 | for (ALL_LIST_ELEMENTS (pim_ifchannel_list, chnode, chnextnode, ch)) |
219e0013 | 1347 | { |
ea4a71fc | 1348 | pim_ifp = ch->interface->info; |
7a3ddda5 DS |
1349 | if (!pim_ifp) |
1350 | continue; | |
219e0013 | 1351 | |
ea4a71fc | 1352 | if (pim_upstream_evaluate_join_desired_interface (up, ch)) |
7a3ddda5 | 1353 | { |
781a1745 DS |
1354 | int flag = PIM_OIF_FLAG_PROTO_PIM; |
1355 | ||
1356 | if (ch->sg.src.s_addr == INADDR_ANY && ch->upstream != up) | |
1357 | flag = PIM_OIF_FLAG_PROTO_STAR; | |
1358 | pim_channel_add_oif (up->channel_oil, ch->interface, flag); | |
ea4a71fc | 1359 | output_intf++; |
219e0013 DS |
1360 | } |
1361 | } | |
1362 | ||
b5183fd1 DS |
1363 | return output_intf; |
1364 | } | |
1365 | ||
1366 | /* | |
1367 | * For a given upstream, determine the inherited_olist | |
1368 | * and apply it. | |
1369 | * | |
1370 | * inherited_olist(S,G,rpt) = | |
1371 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1372 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1373 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1374 | * | |
1375 | * inherited_olist(S,G) = | |
1376 | * inherited_olist(S,G,rpt) (+) | |
1377 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1378 | * | |
1379 | * return 1 if there are any output interfaces | |
1380 | * return 0 if there are not any output interfaces | |
1381 | */ | |
1382 | int | |
1383 | pim_upstream_inherited_olist (struct pim_upstream *up) | |
1384 | { | |
1385 | int output_intf = pim_upstream_inherited_olist_decide (up); | |
1386 | ||
483eef9d DS |
1387 | /* |
1388 | * If we have output_intf switch state to Join and work like normal | |
1389 | * If we don't have an output_intf that means we are probably a | |
1390 | * switch on a stick so turn on forwarding to just accept the | |
1391 | * incoming packets so we don't bother the other stuff! | |
1392 | */ | |
1393 | if (output_intf) | |
1394 | pim_upstream_switch (up, PIM_UPSTREAM_JOINED); | |
1395 | else | |
1396 | forward_on (up); | |
219e0013 DS |
1397 | |
1398 | return output_intf; | |
4fdc8f36 | 1399 | } |
d3dd1804 | 1400 | |
80d9c3a0 DS |
1401 | int |
1402 | pim_upstream_empty_inherited_olist (struct pim_upstream *up) | |
1403 | { | |
ce0ddb4e | 1404 | return pim_channel_oil_empty (up->channel_oil); |
80d9c3a0 DS |
1405 | } |
1406 | ||
d3dd1804 DS |
1407 | /* |
1408 | * When we have a new neighbor, | |
1409 | * find upstreams that don't have their rpf_addr | |
1410 | * set and see if the new neighbor allows | |
1411 | * the join to be sent | |
1412 | */ | |
1413 | void | |
1414 | pim_upstream_find_new_rpf (void) | |
1415 | { | |
1416 | struct listnode *up_node; | |
1417 | struct listnode *up_nextnode; | |
1418 | struct pim_upstream *up; | |
1419 | ||
1420 | /* | |
0f588989 DS |
1421 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr |
1422 | */ | |
1423 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) | |
d3dd1804 | 1424 | { |
63c59d0c | 1425 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) |
d3dd1804 | 1426 | { |
3197cb1e | 1427 | if (PIM_DEBUG_TRACE) |
d3dd1804 | 1428 | zlog_debug ("Upstream %s without a path to send join, checking", |
8bfb8b67 | 1429 | up->sg_str); |
d3dd1804 DS |
1430 | pim_rpf_update (up, NULL); |
1431 | } | |
1432 | } | |
1433 | } | |
0f588989 | 1434 | |
0f588989 DS |
1435 | static unsigned int |
1436 | pim_upstream_hash_key (void *arg) | |
1437 | { | |
1438 | struct pim_upstream *up = (struct pim_upstream *)arg; | |
1439 | ||
1440 | return jhash_2words (up->sg.src.s_addr, up->sg.grp.s_addr, 0); | |
1441 | } | |
1442 | ||
1443 | void pim_upstream_terminate (void) | |
1444 | { | |
1445 | if (pim_upstream_list) | |
693c9259 | 1446 | list_delete (pim_upstream_list); |
0f588989 DS |
1447 | pim_upstream_list = NULL; |
1448 | ||
1449 | if (pim_upstream_hash) | |
1450 | hash_free (pim_upstream_hash); | |
693c9259 | 1451 | pim_upstream_hash = NULL; |
0f588989 DS |
1452 | } |
1453 | ||
1454 | static int | |
1455 | pim_upstream_equal (const void *arg1, const void *arg2) | |
1456 | { | |
1457 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; | |
1458 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
1459 | ||
1460 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) && | |
1461 | (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
1462 | return 1; | |
1463 | ||
1464 | return 0; | |
1465 | } | |
1466 | ||
1bf16443 | 1467 | /* rfc4601:section-4.2:"Data Packet Forwarding Rules" defines |
1468 | * the cases where kat has to be restarted on rxing traffic - | |
1469 | * | |
1470 | * if( DirectlyConnected(S) == TRUE AND iif == RPF_interface(S) ) { | |
1471 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1472 | * # Note: a register state transition or UpstreamJPState(S,G) | |
1473 | * # transition may happen as a result of restarting | |
1474 | * # KeepaliveTimer, and must be dealt with here. | |
1475 | * } | |
1476 | * if( iif == RPF_interface(S) AND UpstreamJPState(S,G) == Joined AND | |
1477 | * inherited_olist(S,G) != NULL ) { | |
1478 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1479 | * } | |
1480 | */ | |
1481 | static bool pim_upstream_kat_start_ok(struct pim_upstream *up) | |
1482 | { | |
1483 | /* "iif == RPF_interface(S)" check has to be done by the kernel or hw | |
1484 | * so we will skip that here */ | |
1485 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1486 | up->sg.src)) { | |
1487 | return true; | |
1488 | } | |
1489 | ||
1490 | if ((up->join_state == PIM_UPSTREAM_JOINED) && | |
1491 | !pim_upstream_empty_inherited_olist(up)) { | |
1492 | /* XXX: I have added this RP check just for 3.2 and it's a digression from | |
1493 | * what rfc-4601 says. Till now we were only running KAT on FHR and RP and | |
1494 | * there is some angst around making the change to run it all routers that | |
1495 | * maintain the (S, G) state. This is tracked via CM-13601 and MUST be | |
1496 | * removed to handle spt turn-arounds correctly in a 3-tier clos */ | |
1497 | if (I_am_RP (up->sg.grp)) | |
1498 | return true; | |
1499 | } | |
1500 | ||
1501 | return false; | |
1502 | } | |
1503 | ||
9c5e4d62 DS |
1504 | /* |
1505 | * Code to check and see if we've received packets on a S,G mroute | |
1506 | * and if so to set the SPT bit appropriately | |
1507 | */ | |
1508 | static void | |
1509 | pim_upstream_sg_running (void *arg) | |
1510 | { | |
1511 | struct pim_upstream *up = (struct pim_upstream *)arg; | |
e43b8697 DS |
1512 | |
1513 | // No packet can have arrived here if this is the case | |
1514 | if (!up->channel_oil || !up->channel_oil->installed) | |
1515 | { | |
1516 | if (PIM_DEBUG_TRACE) | |
1517 | zlog_debug ("%s: %s is not installed in mroute", | |
8bfb8b67 | 1518 | __PRETTY_FUNCTION__, up->sg_str); |
e43b8697 DS |
1519 | return; |
1520 | } | |
1521 | ||
bfdf4096 DS |
1522 | /* |
1523 | * This is a bit of a hack | |
1524 | * We've noted that we should rescan but | |
1525 | * we've missed the window for doing so in | |
1526 | * pim_zebra.c for some reason. I am | |
1527 | * only doing this at this point in time | |
1528 | * to get us up and working for the moment | |
1529 | */ | |
1530 | if (up->channel_oil->oil_inherited_rescan) | |
1531 | { | |
1532 | if (PIM_DEBUG_TRACE) | |
1533 | zlog_debug ("%s: Handling unscanned inherited_olist for %s", __PRETTY_FUNCTION__, up->sg_str); | |
1534 | pim_upstream_inherited_olist_decide (up); | |
1535 | up->channel_oil->oil_inherited_rescan = 0; | |
1536 | } | |
e43b8697 DS |
1537 | pim_mroute_update_counters (up->channel_oil); |
1538 | ||
1539 | // Have we seen packets? | |
1bf16443 | 1540 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) && |
e43b8697 DS |
1541 | (up->channel_oil->cc.lastused/100 > 30)) |
1542 | { | |
1543 | if (PIM_DEBUG_TRACE) | |
1544 | { | |
eeedae06 DS |
1545 | zlog_debug ("%s: %s old packet count is equal or lastused is greater than 30, (%ld,%ld,%lld)", |
1546 | __PRETTY_FUNCTION__, up->sg_str, | |
1547 | up->channel_oil->cc.oldpktcnt, | |
1548 | up->channel_oil->cc.pktcnt, | |
1549 | up->channel_oil->cc.lastused/100); | |
e43b8697 DS |
1550 | } |
1551 | return; | |
1552 | } | |
1553 | ||
1bf16443 | 1554 | if (pim_upstream_kat_start_ok(up)) { |
1555 | /* Add a source reference to the stream if | |
1556 | * one doesn't already exist */ | |
1557 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) | |
1558 | { | |
1559 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 DS |
1560 | zlog_debug ("source reference created on kat restart %s", up->sg_str); |
1561 | ||
1bf16443 | 1562 | pim_upstream_ref(up, PIM_UPSTREAM_FLAG_MASK_SRC_STREAM); |
1563 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); | |
1564 | pim_upstream_fhr_kat_start(up); | |
1565 | } | |
1566 | pim_upstream_keep_alive_timer_start(up, qpim_keep_alive_time); | |
1567 | } | |
1568 | ||
1569 | if (up->sptbit != PIM_UPSTREAM_SPTBIT_TRUE) | |
1570 | { | |
1571 | pim_upstream_set_sptbit(up, up->rpf.source_nexthop.interface); | |
1572 | } | |
e43b8697 | 1573 | return; |
9c5e4d62 DS |
1574 | } |
1575 | ||
040d86ad DS |
1576 | void |
1577 | pim_upstream_init (void) | |
0f588989 | 1578 | { |
9c5e4d62 DS |
1579 | pim_upstream_sg_wheel = wheel_init (master, 31000, 100, |
1580 | pim_upstream_hash_key, | |
1581 | pim_upstream_sg_running); | |
0f588989 DS |
1582 | pim_upstream_hash = hash_create_size (8192, pim_upstream_hash_key, |
1583 | pim_upstream_equal); | |
1584 | ||
1585 | pim_upstream_list = list_new (); | |
1586 | pim_upstream_list->del = (void (*)(void *)) pim_upstream_free; | |
03417ccd | 1587 | pim_upstream_list->cmp = pim_upstream_compare; |
0f588989 DS |
1588 | |
1589 | } |