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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" |
1bc98276 | 55 | #include "pim_nht.h" |
12e41d03 | 56 | |
0f588989 DS |
57 | struct hash *pim_upstream_hash = NULL; |
58 | struct list *pim_upstream_list = NULL; | |
9c5e4d62 | 59 | struct timer_wheel *pim_upstream_sg_wheel = NULL; |
0f588989 | 60 | |
982bff89 | 61 | static void join_timer_stop(struct pim_upstream *up); |
12e41d03 DL |
62 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); |
63 | ||
cfa91a87 DS |
64 | /* |
65 | * A (*,G) or a (*,*) is going away | |
66 | * remove the parent pointer from | |
67 | * those pointing at us | |
68 | */ | |
69 | static void | |
70 | pim_upstream_remove_children (struct pim_upstream *up) | |
71 | { | |
cfa91a87 DS |
72 | struct pim_upstream *child; |
73 | ||
03417ccd | 74 | if (!up->sources) |
cfa91a87 DS |
75 | return; |
76 | ||
03417ccd | 77 | while (!list_isempty (up->sources)) |
cfa91a87 | 78 | { |
03417ccd DS |
79 | child = listnode_head (up->sources); |
80 | child->parent = NULL; | |
81 | listnode_delete (up->sources, child); | |
cfa91a87 DS |
82 | } |
83 | } | |
84 | ||
85 | /* | |
86 | * A (*,G) or a (*,*) is being created | |
87 | * Find the children that would point | |
88 | * at us. | |
89 | */ | |
90 | static void | |
91 | pim_upstream_find_new_children (struct pim_upstream *up) | |
92 | { | |
93 | struct pim_upstream *child; | |
94 | struct listnode *ch_node; | |
95 | ||
4ed0af70 DS |
96 | if ((up->sg.src.s_addr != INADDR_ANY) && |
97 | (up->sg.grp.s_addr != INADDR_ANY)) | |
cfa91a87 DS |
98 | return; |
99 | ||
4ed0af70 DS |
100 | if ((up->sg.src.s_addr == INADDR_ANY) && |
101 | (up->sg.grp.s_addr == INADDR_ANY)) | |
cfa91a87 DS |
102 | return; |
103 | ||
0f588989 | 104 | for (ALL_LIST_ELEMENTS_RO (pim_upstream_list, ch_node, child)) |
cfa91a87 | 105 | { |
4ed0af70 | 106 | if ((up->sg.grp.s_addr != INADDR_ANY) && |
0f588989 | 107 | (child->sg.grp.s_addr == up->sg.grp.s_addr) && |
cfa91a87 | 108 | (child != up)) |
03417ccd DS |
109 | { |
110 | child->parent = up; | |
111 | listnode_add_sort (up->sources, child); | |
112 | } | |
cfa91a87 DS |
113 | } |
114 | } | |
115 | ||
4d99418b DS |
116 | /* |
117 | * If we have a (*,*) || (S,*) there is no parent | |
118 | * If we have a (S,G), find the (*,G) | |
119 | * If we have a (*,G), find the (*,*) | |
120 | */ | |
121 | static struct pim_upstream * | |
03417ccd | 122 | pim_upstream_find_parent (struct pim_upstream *child) |
4d99418b | 123 | { |
03417ccd DS |
124 | struct prefix_sg any = child->sg; |
125 | struct pim_upstream *up = NULL; | |
4d99418b DS |
126 | |
127 | // (S,G) | |
03417ccd DS |
128 | if ((child->sg.src.s_addr != INADDR_ANY) && |
129 | (child->sg.grp.s_addr != INADDR_ANY)) | |
4d99418b | 130 | { |
4ed0af70 | 131 | any.src.s_addr = INADDR_ANY; |
03417ccd DS |
132 | up = pim_upstream_find (&any); |
133 | ||
134 | if (up) | |
135 | listnode_add (up->sources, child); | |
136 | ||
137 | return up; | |
4d99418b DS |
138 | } |
139 | ||
03417ccd | 140 | return NULL; |
4d99418b DS |
141 | } |
142 | ||
12e41d03 DL |
143 | void pim_upstream_free(struct pim_upstream *up) |
144 | { | |
d0db90bf | 145 | memset (up, 0, sizeof (struct pim_upstream)); |
12e41d03 | 146 | XFREE(MTYPE_PIM_UPSTREAM, up); |
1bc98276 | 147 | up = NULL; |
12e41d03 DL |
148 | } |
149 | ||
150 | static void upstream_channel_oil_detach(struct pim_upstream *up) | |
151 | { | |
152 | if (up->channel_oil) { | |
153 | pim_channel_oil_del(up->channel_oil); | |
25a335e0 | 154 | up->channel_oil = NULL; |
12e41d03 DL |
155 | } |
156 | } | |
157 | ||
d0db90bf | 158 | struct pim_upstream * |
e5905a3b | 159 | pim_upstream_del(struct pim_upstream *up, const char *name) |
12e41d03 | 160 | { |
7667c556 | 161 | bool notify_msdp = false; |
1bc98276 | 162 | struct prefix nht_p; |
7667c556 | 163 | |
3197cb1e DS |
164 | if (PIM_DEBUG_TRACE) |
165 | zlog_debug ("%s(%s): Delete %s ref count: %d", | |
166 | __PRETTY_FUNCTION__, name, up->sg_str, up->ref_count); | |
167 | ||
e5905a3b DS |
168 | --up->ref_count; |
169 | ||
170 | if (up->ref_count >= 1) | |
d0db90bf DS |
171 | return up; |
172 | else if (up->ref_count < 0) | |
173 | return NULL; | |
e5905a3b | 174 | |
f14248dd | 175 | THREAD_OFF(up->t_ka_timer); |
792f4d29 | 176 | THREAD_OFF(up->t_rs_timer); |
1bf16443 | 177 | THREAD_OFF(up->t_msdp_reg_timer); |
12e41d03 | 178 | |
7667c556 | 179 | if (up->join_state == PIM_UPSTREAM_JOINED) { |
982bff89 DS |
180 | pim_jp_agg_single_upstream_send (&up->rpf, up, 0); |
181 | ||
7667c556 | 182 | if (up->sg.src.s_addr == INADDR_ANY) { |
183 | /* if a (*, G) entry in the joined state is being deleted we | |
184 | * need to notify MSDP */ | |
185 | notify_msdp = true; | |
186 | } | |
187 | } | |
188 | ||
fc9d070d | 189 | join_timer_stop(up); |
06e12762 | 190 | pim_jp_agg_upstream_verification (up, false); |
fc9d070d DS |
191 | up->rpf.source_nexthop.interface = NULL; |
192 | ||
36e466fe | 193 | if (up->sg.src.s_addr != INADDR_ANY) { |
9c5e4d62 | 194 | wheel_remove_item (pim_upstream_sg_wheel, up); |
36e466fe | 195 | notify_msdp = true; |
196 | } | |
9c5e4d62 | 197 | |
cfa91a87 | 198 | pim_upstream_remove_children (up); |
6a78764e | 199 | pim_mroute_del (up->channel_oil, __PRETTY_FUNCTION__); |
12e41d03 DL |
200 | upstream_channel_oil_detach(up); |
201 | ||
03417ccd DS |
202 | if (up->sources) |
203 | list_delete (up->sources); | |
204 | up->sources = NULL; | |
205 | ||
12e41d03 DL |
206 | /* |
207 | notice that listnode_delete() can't be moved | |
208 | into pim_upstream_free() because the later is | |
209 | called by list_delete_all_node() | |
210 | */ | |
03417ccd DS |
211 | if (up->parent) |
212 | { | |
213 | listnode_delete (up->parent->sources, up); | |
214 | up->parent = NULL; | |
215 | } | |
0f588989 DS |
216 | listnode_delete (pim_upstream_list, up); |
217 | hash_release (pim_upstream_hash, up); | |
12e41d03 | 218 | |
1bc98276 CS |
219 | if (notify_msdp) |
220 | { | |
221 | pim_msdp_up_del (&up->sg); | |
222 | } | |
223 | ||
224 | /* Deregister addr with Zebra NHT */ | |
225 | nht_p.family = AF_INET; | |
226 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
227 | nht_p.u.prefix4 = up->upstream_addr; | |
228 | if (PIM_DEBUG_TRACE) | |
229 | { | |
230 | char buf[PREFIX2STR_BUFFER]; | |
231 | prefix2str (&nht_p, buf, sizeof (buf)); | |
232 | zlog_debug ("%s: Deregister upstream %s upstream addr %s with NHT ", | |
233 | __PRETTY_FUNCTION__, up->sg_str, buf); | |
234 | } | |
235 | pim_delete_tracked_nexthop (&nht_p, up, NULL); | |
236 | ||
237 | pim_upstream_free (up); | |
d0db90bf DS |
238 | |
239 | return NULL; | |
12e41d03 DL |
240 | } |
241 | ||
56638739 DS |
242 | void |
243 | pim_upstream_send_join (struct pim_upstream *up) | |
12e41d03 | 244 | { |
3197cb1e | 245 | if (PIM_DEBUG_TRACE) { |
eaa54bdb | 246 | char rpf_str[PREFIX_STRLEN]; |
63c59d0c | 247 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 248 | zlog_debug ("%s: RPF'%s=%s(%s) for Interface %s", __PRETTY_FUNCTION__, |
8bfb8b67 | 249 | up->sg_str, rpf_str, pim_upstream_state2str (up->join_state), |
56638739 | 250 | up->rpf.source_nexthop.interface->name); |
63c59d0c | 251 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { |
05e451f8 | 252 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", |
56638739 | 253 | __PRETTY_FUNCTION__, |
8bfb8b67 | 254 | up->sg_str, rpf_str); |
12e41d03 DL |
255 | /* warning only */ |
256 | } | |
257 | } | |
56638739 | 258 | |
12e41d03 | 259 | /* send Join(S,G) to the current upstream neighbor */ |
982bff89 | 260 | pim_jp_agg_single_upstream_send(&up->rpf, up, 1 /* join */); |
12e41d03 DL |
261 | } |
262 | ||
263 | static int on_join_timer(struct thread *t) | |
264 | { | |
265 | struct pim_upstream *up; | |
266 | ||
12e41d03 | 267 | up = THREAD_ARG(t); |
12e41d03 | 268 | |
bb6e291f DS |
269 | up->t_join_timer = NULL; |
270 | ||
271 | /* | |
272 | * In the case of a HFR we will not ahve anyone to send this to. | |
273 | */ | |
0bf27c5c | 274 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
bb6e291f DS |
275 | return 0; |
276 | ||
eb345962 DS |
277 | /* |
278 | * Don't send the join if the outgoing interface is a loopback | |
279 | * But since this might change leave the join timer running | |
280 | */ | |
fc9d070d DS |
281 | if (up->rpf.source_nexthop.interface && |
282 | !if_is_loopback (up->rpf.source_nexthop.interface)) | |
eb345962 | 283 | pim_upstream_send_join (up); |
12e41d03 | 284 | |
12e41d03 DL |
285 | join_timer_start(up); |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
982bff89 | 290 | static void join_timer_stop(struct pim_upstream *up) |
12e41d03 | 291 | { |
982bff89 DS |
292 | struct pim_neighbor *nbr; |
293 | ||
294 | nbr = pim_neighbor_find (up->rpf.source_nexthop.interface, | |
295 | up->rpf.rpf_addr.u.prefix4); | |
296 | ||
297 | if (nbr) | |
298 | pim_jp_agg_remove_group (nbr->upstream_jp_agg, up); | |
299 | ||
300 | THREAD_OFF (up->t_join_timer); | |
06e12762 | 301 | pim_jp_agg_upstream_verification (up, false); |
982bff89 DS |
302 | } |
303 | ||
304 | void | |
305 | join_timer_start(struct pim_upstream *up) | |
306 | { | |
fc9d070d | 307 | struct pim_neighbor *nbr = NULL; |
982bff89 | 308 | |
fc9d070d DS |
309 | if (up->rpf.source_nexthop.interface) |
310 | { | |
311 | nbr = pim_neighbor_find (up->rpf.source_nexthop.interface, | |
312 | up->rpf.rpf_addr.u.prefix4); | |
313 | ||
314 | if (PIM_DEBUG_PIM_EVENTS) { | |
315 | zlog_debug("%s: starting %d sec timer for upstream (S,G)=%s", | |
316 | __PRETTY_FUNCTION__, | |
317 | qpim_t_periodic, | |
318 | up->sg_str); | |
319 | } | |
320 | } | |
12e41d03 | 321 | |
982bff89 DS |
322 | if (nbr) |
323 | pim_jp_agg_add_group (nbr->upstream_jp_agg, up, 1); | |
324 | else | |
325 | { | |
326 | THREAD_OFF (up->t_join_timer); | |
327 | THREAD_TIMER_ON(master, up->t_join_timer, | |
328 | on_join_timer, | |
329 | up, qpim_t_periodic); | |
330 | } | |
06e12762 | 331 | pim_jp_agg_upstream_verification (up, true); |
12e41d03 DL |
332 | } |
333 | ||
982bff89 DS |
334 | /* |
335 | * This is only called when we are switching the upstream | |
336 | * J/P from one neighbor to another | |
337 | * | |
338 | * As such we need to remove from the old list and | |
339 | * add to the new list. | |
340 | */ | |
341 | void pim_upstream_join_timer_restart(struct pim_upstream *up, struct pim_rpf *old) | |
12e41d03 | 342 | { |
982bff89 | 343 | //THREAD_OFF(up->t_join_timer); |
12e41d03 DL |
344 | join_timer_start(up); |
345 | } | |
346 | ||
347 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
348 | int interval_msec) | |
349 | { | |
350 | if (PIM_DEBUG_PIM_EVENTS) { | |
05e451f8 | 351 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", |
12e41d03 DL |
352 | __PRETTY_FUNCTION__, |
353 | interval_msec, | |
8bfb8b67 | 354 | up->sg_str); |
12e41d03 DL |
355 | } |
356 | ||
357 | THREAD_OFF(up->t_join_timer); | |
358 | THREAD_TIMER_MSEC_ON(master, up->t_join_timer, | |
359 | on_join_timer, | |
360 | up, interval_msec); | |
361 | } | |
362 | ||
363 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
364 | struct in_addr rpf_addr, | |
365 | int holdtime) | |
366 | { | |
367 | long t_joinsuppress_msec; | |
368 | long join_timer_remain_msec; | |
369 | ||
370 | t_joinsuppress_msec = MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
371 | 1000 * holdtime); | |
372 | ||
373 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
374 | ||
3197cb1e | 375 | if (PIM_DEBUG_TRACE) { |
eaa54bdb | 376 | char rpf_str[INET_ADDRSTRLEN]; |
12e41d03 | 377 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 378 | zlog_debug("%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", |
12e41d03 | 379 | __FILE__, __PRETTY_FUNCTION__, |
8bfb8b67 | 380 | up->sg_str, |
12e41d03 DL |
381 | rpf_str, |
382 | join_timer_remain_msec, t_joinsuppress_msec); | |
383 | } | |
384 | ||
385 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
3197cb1e | 386 | if (PIM_DEBUG_TRACE) { |
05e451f8 | 387 | zlog_debug("%s %s: suppressing Join(S,G)=%s for %ld msec", |
12e41d03 | 388 | __FILE__, __PRETTY_FUNCTION__, |
8bfb8b67 | 389 | up->sg_str, t_joinsuppress_msec); |
12e41d03 DL |
390 | } |
391 | ||
392 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
393 | } | |
394 | } | |
395 | ||
396 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
c48a612c | 397 | struct pim_upstream *up) |
12e41d03 DL |
398 | { |
399 | long join_timer_remain_msec; | |
400 | int t_override_msec; | |
401 | ||
402 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
403 | t_override_msec = pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
404 | ||
3197cb1e | 405 | if (PIM_DEBUG_TRACE) { |
eaa54bdb | 406 | char rpf_str[INET_ADDRSTRLEN]; |
c48a612c | 407 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr.u.prefix4, rpf_str, sizeof(rpf_str)); |
05e451f8 | 408 | zlog_debug("%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", |
12e41d03 | 409 | debug_label, |
8bfb8b67 | 410 | up->sg_str, rpf_str, |
12e41d03 DL |
411 | join_timer_remain_msec, t_override_msec); |
412 | } | |
413 | ||
414 | if (join_timer_remain_msec > t_override_msec) { | |
3197cb1e | 415 | if (PIM_DEBUG_TRACE) { |
05e451f8 | 416 | zlog_debug("%s: decreasing (S,G)=%s join timer to t_override=%d msec", |
12e41d03 | 417 | debug_label, |
8bfb8b67 | 418 | up->sg_str, |
12e41d03 DL |
419 | t_override_msec); |
420 | } | |
421 | ||
422 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
423 | } | |
424 | } | |
425 | ||
426 | static void forward_on(struct pim_upstream *up) | |
427 | { | |
12e41d03 DL |
428 | struct listnode *chnode; |
429 | struct listnode *chnextnode; | |
12e41d03 DL |
430 | struct pim_interface *pim_ifp; |
431 | struct pim_ifchannel *ch; | |
432 | ||
ea4a71fc DS |
433 | /* scan (S,G) state */ |
434 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
435 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
436 | if (!pim_ifp) |
437 | continue; | |
438 | ||
ea4a71fc DS |
439 | if (ch->upstream != up) |
440 | continue; | |
12e41d03 | 441 | |
ea4a71fc DS |
442 | if (pim_macro_chisin_oiflist(ch)) |
443 | pim_forward_start(ch); | |
12e41d03 | 444 | |
ea4a71fc | 445 | } /* scan iface channel list */ |
12e41d03 DL |
446 | } |
447 | ||
448 | static void forward_off(struct pim_upstream *up) | |
449 | { | |
12e41d03 DL |
450 | struct listnode *chnode; |
451 | struct listnode *chnextnode; | |
12e41d03 DL |
452 | struct pim_interface *pim_ifp; |
453 | struct pim_ifchannel *ch; | |
454 | ||
ea4a71fc DS |
455 | /* scan per-interface (S,G) state */ |
456 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
457 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
458 | if (!pim_ifp) |
459 | continue; | |
460 | ||
ea4a71fc DS |
461 | if (ch->upstream != up) |
462 | continue; | |
12e41d03 | 463 | |
ea4a71fc | 464 | pim_forward_stop(ch); |
12e41d03 | 465 | |
ea4a71fc | 466 | } /* scan iface channel list */ |
12e41d03 DL |
467 | } |
468 | ||
bb6e291f DS |
469 | static int |
470 | pim_upstream_could_register (struct pim_upstream *up) | |
471 | { | |
472 | struct pim_interface *pim_ifp = up->rpf.source_nexthop.interface->info; | |
473 | ||
35917570 | 474 | if (pim_ifp && PIM_I_am_DR (pim_ifp) && |
bb6e291f DS |
475 | pim_if_connected_to_source (up->rpf.source_nexthop.interface, up->sg.src)) |
476 | return 1; | |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
7fcdfb34 DS |
481 | void |
482 | pim_upstream_switch(struct pim_upstream *up, | |
483 | enum pim_upstream_state new_state) | |
12e41d03 DL |
484 | { |
485 | enum pim_upstream_state old_state = up->join_state; | |
486 | ||
12e41d03 | 487 | if (PIM_DEBUG_PIM_EVENTS) { |
c9802954 | 488 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", |
12e41d03 | 489 | __PRETTY_FUNCTION__, |
8bfb8b67 | 490 | up->sg_str, |
c9802954 DS |
491 | pim_upstream_state2str (up->join_state), |
492 | pim_upstream_state2str (new_state)); | |
12e41d03 DL |
493 | } |
494 | ||
b4786acd | 495 | up->join_state = new_state; |
496 | if (old_state != new_state) | |
497 | up->state_transition = pim_time_monotonic_sec(); | |
bb027ee8 | 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 | { |
0c2ebf00 | 512 | up->reg_state = PIM_REG_JOIN; |
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 | ||
1bc98276 | 539 | int |
03417ccd DS |
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)); |
1bc98276 CS |
570 | if (!up) |
571 | { | |
572 | zlog_err("%s: PIM XCALLOC(%zu) failure", | |
12e41d03 | 573 | __PRETTY_FUNCTION__, sizeof(*up)); |
1bc98276 CS |
574 | return NULL; |
575 | } | |
12e41d03 | 576 | |
5074a423 | 577 | up->sg = *sg; |
8bfb8b67 | 578 | pim_str_sg_set (sg, up->sg_str); |
0f588989 | 579 | up = hash_get (pim_upstream_hash, up, hash_alloc_intern); |
36d6bd7d | 580 | if (!pim_rp_set_upstream_addr (&up->upstream_addr, sg->src, sg->grp)) |
8f5f5e91 | 581 | { |
3197cb1e | 582 | if (PIM_DEBUG_TRACE) |
8f5f5e91 DS |
583 | zlog_debug("%s: Received a (*,G) with no RP configured", __PRETTY_FUNCTION__); |
584 | ||
03417ccd | 585 | hash_release (pim_upstream_hash, up); |
8f5f5e91 DS |
586 | XFREE (MTYPE_PIM_UPSTREAM, up); |
587 | return NULL; | |
588 | } | |
589 | ||
03417ccd DS |
590 | up->parent = pim_upstream_find_parent (up); |
591 | if (up->sg.src.s_addr == INADDR_ANY) | |
592 | { | |
593 | up->sources = list_new (); | |
594 | up->sources->cmp = pim_upstream_compare; | |
595 | } | |
596 | else | |
597 | up->sources = NULL; | |
598 | ||
cfa91a87 | 599 | pim_upstream_find_new_children (up); |
4a40c37a | 600 | up->flags = flags; |
12e41d03 | 601 | up->ref_count = 1; |
4a4c4a07 DS |
602 | up->t_join_timer = NULL; |
603 | up->t_ka_timer = NULL; | |
792f4d29 | 604 | up->t_rs_timer = NULL; |
1bf16443 | 605 | up->t_msdp_reg_timer = NULL; |
b4786acd | 606 | up->join_state = PIM_UPSTREAM_NOTJOINED; |
0c2ebf00 | 607 | up->reg_state = PIM_REG_NOINFO; |
12e41d03 | 608 | up->state_transition = pim_time_monotonic_sec(); |
4a4c4a07 | 609 | up->channel_oil = NULL; |
f9e0ab5b | 610 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; |
12e41d03 | 611 | |
f24405b1 | 612 | up->rpf.source_nexthop.interface = NULL; |
63c59d0c DS |
613 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; |
614 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
12e41d03 DL |
615 | up->rpf.source_nexthop.mrib_metric_preference = qpim_infinite_assert_metric.metric_preference; |
616 | up->rpf.source_nexthop.mrib_route_metric = qpim_infinite_assert_metric.route_metric; | |
63c59d0c DS |
617 | up->rpf.rpf_addr.family = AF_INET; |
618 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
12e41d03 | 619 | |
9c5e4d62 DS |
620 | if (up->sg.src.s_addr != INADDR_ANY) |
621 | wheel_add_item (pim_upstream_sg_wheel, up); | |
622 | ||
1bc98276 | 623 | rpf_result = pim_rpf_update(up, NULL, 1); |
2f702571 | 624 | if (rpf_result == PIM_RPF_FAILURE) { |
ec97ac65 DS |
625 | struct prefix nht_p; |
626 | ||
3197cb1e | 627 | if (PIM_DEBUG_TRACE) |
4a40c37a | 628 | zlog_debug ("%s: Attempting to create upstream(%s), Unable to RPF for source", __PRETTY_FUNCTION__, |
8bfb8b67 | 629 | up->sg_str); |
03417ccd | 630 | |
ec97ac65 DS |
631 | nht_p.family = AF_INET; |
632 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
633 | nht_p.u.prefix4 = up->upstream_addr; | |
634 | pim_delete_tracked_nexthop (&nht_p, up, NULL); | |
635 | ||
03417ccd DS |
636 | if (up->parent) |
637 | { | |
638 | listnode_delete (up->parent->sources, up); | |
639 | up->parent = NULL; | |
640 | } | |
9c5e4d62 DS |
641 | |
642 | if (up->sg.src.s_addr != INADDR_ANY) | |
643 | wheel_remove_item (pim_upstream_sg_wheel, up); | |
644 | ||
03417ccd DS |
645 | pim_upstream_remove_children (up); |
646 | if (up->sources) | |
647 | list_delete (up->sources); | |
648 | ||
649 | hash_release (pim_upstream_hash, up); | |
2f702571 DS |
650 | XFREE(MTYPE_PIM_UPSTREAM, up); |
651 | return NULL; | |
652 | } | |
12e41d03 | 653 | |
07335c8d DS |
654 | pim_ifp = up->rpf.source_nexthop.interface->info; |
655 | if (pim_ifp) | |
656 | up->channel_oil = pim_channel_oil_add(&up->sg, pim_ifp->mroute_vif_index); | |
657 | ||
0f588989 | 658 | listnode_add_sort(pim_upstream_list, up); |
12e41d03 | 659 | |
3197cb1e | 660 | if (PIM_DEBUG_TRACE) |
1bc98276 CS |
661 | { |
662 | zlog_debug ("%s: Created Upstream %s upstream_addr %s", | |
663 | __PRETTY_FUNCTION__, up->sg_str, | |
664 | inet_ntoa (up->upstream_addr)); | |
665 | } | |
03417ccd | 666 | |
12e41d03 DL |
667 | return up; |
668 | } | |
669 | ||
4ed0af70 | 670 | struct pim_upstream *pim_upstream_find(struct prefix_sg *sg) |
12e41d03 | 671 | { |
0f588989 DS |
672 | struct pim_upstream lookup; |
673 | struct pim_upstream *up = NULL; | |
12e41d03 | 674 | |
0f588989 DS |
675 | lookup.sg = *sg; |
676 | up = hash_lookup (pim_upstream_hash, &lookup); | |
677 | return up; | |
12e41d03 DL |
678 | } |
679 | ||
e711cd3c DS |
680 | struct pim_upstream * |
681 | pim_upstream_find_or_add(struct prefix_sg *sg, | |
682 | struct interface *incoming, | |
683 | int flags, const char *name) | |
684 | { | |
685 | struct pim_upstream *up; | |
686 | ||
687 | up = pim_upstream_find(sg); | |
688 | ||
689 | if (up) | |
690 | { | |
691 | if (!(up->flags & flags)) | |
692 | { | |
693 | up->flags |= flags; | |
694 | up->ref_count++; | |
695 | } | |
696 | } | |
697 | else | |
698 | up = pim_upstream_add (sg, incoming, flags, name); | |
699 | ||
700 | return up; | |
701 | } | |
702 | ||
d0db90bf DS |
703 | void |
704 | pim_upstream_ref(struct pim_upstream *up, int flags) | |
1bf16443 | 705 | { |
706 | up->flags |= flags; | |
707 | ++up->ref_count; | |
708 | } | |
709 | ||
4ed0af70 | 710 | struct pim_upstream *pim_upstream_add(struct prefix_sg *sg, |
4a40c37a | 711 | struct interface *incoming, |
e5905a3b | 712 | int flags, const char *name) |
12e41d03 | 713 | { |
594a78cc | 714 | struct pim_upstream *up = NULL; |
e5905a3b | 715 | int found = 0; |
5074a423 | 716 | up = pim_upstream_find(sg); |
12e41d03 | 717 | if (up) { |
1bf16443 | 718 | pim_upstream_ref(up, flags); |
e5905a3b | 719 | found = 1; |
12e41d03 DL |
720 | } |
721 | else { | |
4a40c37a | 722 | up = pim_upstream_new(sg, incoming, flags); |
12e41d03 DL |
723 | } |
724 | ||
e5905a3b | 725 | if (PIM_DEBUG_TRACE) |
f4075cb4 DS |
726 | { |
727 | if (up) | |
3197cb1e | 728 | zlog_debug("%s(%s): %s, found: %d: ref_count: %d", |
f4075cb4 | 729 | __PRETTY_FUNCTION__, name, |
8bfb8b67 | 730 | up->sg_str, found, |
f4075cb4 DS |
731 | up->ref_count); |
732 | else | |
733 | zlog_debug("%s(%s): (%s) failure to create", | |
734 | __PRETTY_FUNCTION__, name, | |
735 | pim_str_sg_dump (sg)); | |
736 | } | |
12e41d03 | 737 | |
e5905a3b | 738 | return up; |
12e41d03 DL |
739 | } |
740 | ||
9f44d042 | 741 | int |
7a3ddda5 DS |
742 | pim_upstream_evaluate_join_desired_interface (struct pim_upstream *up, |
743 | struct pim_ifchannel *ch) | |
744 | { | |
745 | struct pim_upstream *parent = up->parent; | |
746 | ||
747 | if (ch->upstream == up) | |
748 | { | |
749 | if (!pim_macro_ch_lost_assert(ch) && pim_macro_chisin_joins_or_include(ch)) | |
750 | return 1; | |
46c8aab8 DS |
751 | |
752 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
753 | return 0; | |
7a3ddda5 | 754 | } |
46c8aab8 | 755 | |
7a3ddda5 DS |
756 | /* |
757 | * joins (*,G) | |
758 | */ | |
759 | if (parent && ch->upstream == parent) | |
760 | { | |
761 | if (!pim_macro_ch_lost_assert (ch) && pim_macro_chisin_joins_or_include (ch)) | |
762 | return 1; | |
763 | } | |
764 | ||
765 | return 0; | |
766 | } | |
767 | ||
12e41d03 DL |
768 | /* |
769 | Evaluate JoinDesired(S,G): | |
770 | ||
771 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
772 | in the set: | |
773 | ||
774 | inherited_olist(S,G) = | |
775 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
776 | ||
777 | JoinDesired(S,G) may be affected by changes in the following: | |
778 | ||
779 | pim_ifp->primary_address | |
780 | pim_ifp->pim_dr_addr | |
781 | ch->ifassert_winner_metric | |
782 | ch->ifassert_winner | |
783 | ch->local_ifmembership | |
784 | ch->ifjoin_state | |
785 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
786 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
787 | ch->upstream->rpf.source_nexthop.interface | |
788 | ||
789 | See also pim_upstream_update_join_desired() below. | |
790 | */ | |
791 | int pim_upstream_evaluate_join_desired(struct pim_upstream *up) | |
792 | { | |
12e41d03 DL |
793 | struct listnode *chnode; |
794 | struct listnode *chnextnode; | |
12e41d03 DL |
795 | struct pim_interface *pim_ifp; |
796 | struct pim_ifchannel *ch; | |
7a3ddda5 | 797 | int ret = 0; |
12e41d03 | 798 | |
ea4a71fc DS |
799 | /* scan per-interface (S,G) state */ |
800 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) | |
801 | { | |
802 | pim_ifp = ch->interface->info; | |
803 | if (!pim_ifp) | |
804 | continue; | |
12e41d03 | 805 | |
ea4a71fc DS |
806 | ret += pim_upstream_evaluate_join_desired_interface (up, ch); |
807 | } /* scan iface channel list */ | |
12e41d03 | 808 | |
7a3ddda5 | 809 | return ret; /* false */ |
12e41d03 DL |
810 | } |
811 | ||
812 | /* | |
813 | See also pim_upstream_evaluate_join_desired() above. | |
814 | */ | |
815 | void pim_upstream_update_join_desired(struct pim_upstream *up) | |
816 | { | |
817 | int was_join_desired; /* boolean */ | |
818 | int is_join_desired; /* boolean */ | |
819 | ||
820 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
821 | ||
822 | is_join_desired = pim_upstream_evaluate_join_desired(up); | |
823 | if (is_join_desired) | |
824 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
825 | else | |
826 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
827 | ||
828 | /* switched from false to true */ | |
829 | if (is_join_desired && !was_join_desired) { | |
12e41d03 DL |
830 | pim_upstream_switch(up, PIM_UPSTREAM_JOINED); |
831 | return; | |
832 | } | |
833 | ||
834 | /* switched from true to false */ | |
835 | if (!is_join_desired && was_join_desired) { | |
12e41d03 DL |
836 | pim_upstream_switch(up, PIM_UPSTREAM_NOTJOINED); |
837 | return; | |
838 | } | |
839 | } | |
840 | ||
841 | /* | |
842 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
843 | Transitions from Joined State | |
844 | RPF'(S,G) GenID changes | |
845 | ||
846 | The upstream (S,G) state machine remains in Joined state. If the | |
847 | Join Timer is set to expire in more than t_override seconds, reset | |
848 | it so that it expires after t_override seconds. | |
849 | */ | |
850 | void pim_upstream_rpf_genid_changed(struct in_addr neigh_addr) | |
851 | { | |
852 | struct listnode *up_node; | |
853 | struct listnode *up_nextnode; | |
854 | struct pim_upstream *up; | |
855 | ||
856 | /* | |
0f588989 DS |
857 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr |
858 | */ | |
859 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) { | |
12e41d03 | 860 | |
3197cb1e | 861 | if (PIM_DEBUG_TRACE) { |
eaa54bdb DW |
862 | char neigh_str[INET_ADDRSTRLEN]; |
863 | char rpf_addr_str[PREFIX_STRLEN]; | |
12e41d03 | 864 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, sizeof(neigh_str)); |
63c59d0c | 865 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, sizeof(rpf_addr_str)); |
05e451f8 | 866 | zlog_debug("%s: matching neigh=%s against upstream (S,G)=%s joined=%d rpf_addr=%s", |
12e41d03 | 867 | __PRETTY_FUNCTION__, |
8bfb8b67 | 868 | neigh_str, up->sg_str, |
12e41d03 DL |
869 | up->join_state == PIM_UPSTREAM_JOINED, |
870 | rpf_addr_str); | |
871 | } | |
872 | ||
873 | /* consider only (S,G) upstream in Joined state */ | |
874 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
875 | continue; | |
876 | ||
877 | /* match RPF'(S,G)=neigh_addr */ | |
63c59d0c | 878 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) |
12e41d03 DL |
879 | continue; |
880 | ||
881 | pim_upstream_join_timer_decrease_to_t_override("RPF'(S,G) GenID change", | |
c48a612c | 882 | up); |
12e41d03 DL |
883 | } |
884 | } | |
885 | ||
886 | ||
887 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
888 | struct interface *old_rpf_ifp) | |
889 | { | |
ea4a71fc DS |
890 | struct listnode *chnode; |
891 | struct listnode *chnextnode; | |
892 | struct pim_ifchannel *ch; | |
893 | struct pim_interface *pim_ifp; | |
894 | ||
895 | /* search all ifchannels */ | |
896 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
897 | ||
898 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
899 | if (!pim_ifp) |
900 | continue; | |
901 | ||
ea4a71fc DS |
902 | if (ch->upstream != up) |
903 | continue; | |
12e41d03 | 904 | |
ea4a71fc DS |
905 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { |
906 | if ( | |
907 | /* RPF_interface(S) was NOT I */ | |
908 | (old_rpf_ifp == ch->interface) | |
909 | && | |
910 | /* RPF_interface(S) stopped being I */ | |
911 | (ch->upstream->rpf.source_nexthop.interface != ch->interface) | |
912 | ) { | |
913 | assert_action_a5(ch); | |
914 | } | |
915 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
12e41d03 | 916 | |
ea4a71fc | 917 | pim_ifchannel_update_assert_tracking_desired(ch); |
12e41d03 DL |
918 | } |
919 | } | |
920 | ||
921 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
922 | { | |
12e41d03 DL |
923 | struct listnode *chnode; |
924 | struct listnode *chnextnode; | |
12e41d03 DL |
925 | struct pim_interface *pim_ifp; |
926 | struct pim_ifchannel *ch; | |
927 | ||
ea4a71fc DS |
928 | /* scan per-interface (S,G) state */ |
929 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
930 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
931 | if (!pim_ifp) |
932 | continue; | |
933 | ||
ea4a71fc DS |
934 | if (ch->upstream != up) |
935 | continue; | |
12e41d03 | 936 | |
ea4a71fc DS |
937 | pim_ifchannel_update_could_assert(ch); |
938 | } /* scan iface channel list */ | |
12e41d03 DL |
939 | } |
940 | ||
941 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
942 | { | |
12e41d03 DL |
943 | struct listnode *chnode; |
944 | struct listnode *chnextnode; | |
12e41d03 DL |
945 | struct pim_interface *pim_ifp; |
946 | struct pim_ifchannel *ch; | |
947 | ||
ea4a71fc DS |
948 | /* scan per-interface (S,G) state */ |
949 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
950 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
951 | if (!pim_ifp) |
952 | continue; | |
953 | ||
ea4a71fc DS |
954 | if (ch->upstream != up) |
955 | continue; | |
12e41d03 | 956 | |
ea4a71fc | 957 | pim_ifchannel_update_my_assert_metric(ch); |
12e41d03 | 958 | |
ea4a71fc | 959 | } /* scan iface channel list */ |
12e41d03 DL |
960 | } |
961 | ||
962 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
963 | { | |
12e41d03 DL |
964 | struct listnode *chnode; |
965 | struct listnode *chnextnode; | |
12e41d03 DL |
966 | struct pim_interface *pim_ifp; |
967 | struct pim_ifchannel *ch; | |
968 | ||
ea4a71fc DS |
969 | /* scan per-interface (S,G) state */ |
970 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
971 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
972 | if (!pim_ifp) |
973 | continue; | |
974 | ||
ea4a71fc DS |
975 | if (ch->upstream != up) |
976 | continue; | |
12e41d03 | 977 | |
ea4a71fc | 978 | pim_ifchannel_update_assert_tracking_desired(ch); |
12e41d03 | 979 | |
ea4a71fc | 980 | } /* scan iface channel list */ |
12e41d03 | 981 | } |
f14248dd | 982 | |
1bf16443 | 983 | /* When kat is stopped CouldRegister goes to false so we need to |
984 | * transition the (S, G) on FHR to NI state and remove reg tunnel | |
985 | * from the OIL */ | |
986 | static void pim_upstream_fhr_kat_expiry(struct pim_upstream *up) | |
987 | { | |
988 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) | |
989 | return; | |
990 | ||
991 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 DS |
992 | zlog_debug ("kat expired on %s; clear fhr reg state", up->sg_str); |
993 | ||
1bf16443 | 994 | /* stop reg-stop timer */ |
995 | THREAD_OFF(up->t_rs_timer); | |
996 | /* remove regiface from the OIL if it is there*/ | |
997 | pim_channel_del_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
0c2ebf00 | 998 | /* clear the register state */ |
999 | up->reg_state = PIM_REG_NOINFO; | |
1bf16443 | 1000 | PIM_UPSTREAM_FLAG_UNSET_FHR(up->flags); |
1001 | } | |
1002 | ||
1003 | /* When kat is started CouldRegister can go to true. And if it does we | |
1004 | * need to transition the (S, G) on FHR to JOINED state and add reg tunnel | |
1005 | * to the OIL */ | |
1006 | static void pim_upstream_fhr_kat_start(struct pim_upstream *up) | |
1007 | { | |
1008 | if (pim_upstream_could_register(up)) { | |
1009 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 DS |
1010 | zlog_debug ("kat started on %s; set fhr reg state to joined", up->sg_str); |
1011 | ||
1bf16443 | 1012 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); |
0c2ebf00 | 1013 | if (up->reg_state == PIM_REG_NOINFO) { |
1bf16443 | 1014 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); |
0c2ebf00 | 1015 | up->reg_state = PIM_REG_JOIN; |
1bf16443 | 1016 | } |
1017 | } | |
1018 | } | |
1019 | ||
f14248dd DS |
1020 | /* |
1021 | * On an RP, the PMBR value must be cleared when the | |
1022 | * Keepalive Timer expires | |
1bf16443 | 1023 | * KAT expiry indicates that flow is inactive. If the flow was created or |
1024 | * maintained by activity now is the time to deref it. | |
f14248dd DS |
1025 | */ |
1026 | static int | |
1027 | pim_upstream_keep_alive_timer (struct thread *t) | |
1028 | { | |
1029 | struct pim_upstream *up; | |
1030 | ||
1031 | up = THREAD_ARG(t); | |
1bf16443 | 1032 | up->t_ka_timer = NULL; |
f14248dd | 1033 | |
4ed0af70 | 1034 | if (I_am_RP (up->sg.grp)) |
1bf16443 | 1035 | { |
1036 | pim_br_clear_pmbr (&up->sg); | |
1037 | /* | |
1038 | * We need to do more here :) | |
1039 | * But this is the start. | |
1040 | */ | |
1041 | } | |
14315ea8 | 1042 | |
1bf16443 | 1043 | /* source is no longer active - pull the SA from MSDP's cache */ |
1044 | pim_msdp_sa_local_del(&up->sg); | |
14315ea8 | 1045 | |
1bf16443 | 1046 | /* if entry was created because of activity we need to deref it */ |
1047 | if (PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) | |
1048 | { | |
1049 | pim_upstream_fhr_kat_expiry(up); | |
1050 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 | 1051 | zlog_debug ("kat expired on %s; remove stream reference", up->sg_str); |
1bf16443 | 1052 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(up->flags); |
1053 | pim_upstream_del(up, __PRETTY_FUNCTION__); | |
1054 | } | |
14315ea8 | 1055 | |
1bf16443 | 1056 | return 0; |
f14248dd DS |
1057 | } |
1058 | ||
f14248dd DS |
1059 | void |
1060 | pim_upstream_keep_alive_timer_start (struct pim_upstream *up, | |
1061 | uint32_t time) | |
1062 | { | |
1bf16443 | 1063 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { |
1064 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 | 1065 | zlog_debug ("kat start on %s with no stream reference", up->sg_str); |
1bf16443 | 1066 | } |
00d2f9e4 | 1067 | THREAD_OFF (up->t_ka_timer); |
f14248dd DS |
1068 | THREAD_TIMER_ON (master, |
1069 | up->t_ka_timer, | |
1070 | pim_upstream_keep_alive_timer, | |
1071 | up, time); | |
1bf16443 | 1072 | |
1073 | /* any time keepalive is started against a SG we will have to | |
1074 | * re-evaluate our active source database */ | |
1075 | pim_msdp_sa_local_update(up); | |
1076 | } | |
1077 | ||
1078 | /* MSDP on RP needs to know if a source is registerable to this RP */ | |
1079 | static int | |
1080 | pim_upstream_msdp_reg_timer(struct thread *t) | |
1081 | { | |
1082 | struct pim_upstream *up; | |
1083 | ||
1084 | up = THREAD_ARG(t); | |
1085 | up->t_msdp_reg_timer = NULL; | |
1086 | ||
1087 | /* source is no longer active - pull the SA from MSDP's cache */ | |
1088 | pim_msdp_sa_local_del(&up->sg); | |
1089 | return 1; | |
1090 | } | |
1091 | void | |
1092 | pim_upstream_msdp_reg_timer_start(struct pim_upstream *up) | |
1093 | { | |
1094 | THREAD_OFF(up->t_msdp_reg_timer); | |
1095 | THREAD_TIMER_ON(master, up->t_msdp_reg_timer, | |
1096 | pim_upstream_msdp_reg_timer, up, PIM_MSDP_REG_RXED_PERIOD); | |
1097 | ||
1098 | pim_msdp_sa_local_update(up); | |
f14248dd | 1099 | } |
cb40b272 DS |
1100 | |
1101 | /* | |
1102 | * 4.2.1 Last-Hop Switchover to the SPT | |
1103 | * | |
1104 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
1105 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
1106 | * router, it has the option of switching to receive the traffic on a | |
1107 | * shortest path tree (SPT). | |
1108 | * | |
1109 | * The decision for a router to switch to the SPT is controlled as | |
1110 | * follows: | |
1111 | * | |
1112 | * void | |
1113 | * CheckSwitchToSpt(S,G) { | |
1114 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
1115 | * (+) pim_include(S,G) != NULL ) | |
1116 | * AND SwitchToSptDesired(S,G) ) { | |
1117 | * # Note: Restarting the KAT will result in the SPT switch | |
1118 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1119 | * } | |
1120 | * } | |
1121 | * | |
1122 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
1123 | * defined. An "infinite threshold" policy can be implemented by making | |
1124 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
1125 | * first packet" policy can be implemented by making | |
1126 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
1127 | * received for the source and group. | |
1128 | */ | |
1129 | int | |
4ed0af70 | 1130 | pim_upstream_switch_to_spt_desired (struct prefix_sg *sg) |
cb40b272 | 1131 | { |
4ed0af70 | 1132 | if (I_am_RP (sg->grp)) |
a3b58b4a DS |
1133 | return 1; |
1134 | ||
cb40b272 DS |
1135 | return 0; |
1136 | } | |
d7259eac | 1137 | |
80d9c3a0 DS |
1138 | int |
1139 | pim_upstream_is_sg_rpt (struct pim_upstream *up) | |
1140 | { | |
f21597f0 DS |
1141 | struct listnode *chnode; |
1142 | struct pim_ifchannel *ch; | |
1143 | ||
1144 | for (ALL_LIST_ELEMENTS_RO(pim_ifchannel_list, chnode, ch)) | |
1145 | { | |
1146 | if ((ch->upstream == up) && | |
1147 | (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags))) | |
1148 | return 1; | |
1149 | } | |
e43b8697 | 1150 | |
80d9c3a0 DS |
1151 | return 0; |
1152 | } | |
3a66b17b DS |
1153 | /* |
1154 | * After receiving a packet set SPTbit: | |
1155 | * void | |
1156 | * Update_SPTbit(S,G,iif) { | |
1157 | * if ( iif == RPF_interface(S) | |
1158 | * AND JoinDesired(S,G) == TRUE | |
1159 | * AND ( DirectlyConnected(S) == TRUE | |
1160 | * OR RPF_interface(S) != RPF_interface(RP(G)) | |
1161 | * OR inherited_olist(S,G,rpt) == NULL | |
1162 | * OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1163 | * ( RPF'(S,G) != NULL ) ) | |
1164 | * OR ( I_Am_Assert_Loser(S,G,iif) ) { | |
1165 | * Set SPTbit(S,G) to TRUE | |
1166 | * } | |
1167 | * } | |
1168 | */ | |
1169 | void | |
1170 | pim_upstream_set_sptbit (struct pim_upstream *up, struct interface *incoming) | |
1171 | { | |
1172 | struct pim_rpf *grpf = NULL; | |
1173 | ||
1174 | // iif == RPF_interfvace(S) | |
1175 | if (up->rpf.source_nexthop.interface != incoming) | |
1176 | { | |
1177 | if (PIM_DEBUG_TRACE) | |
1178 | zlog_debug ("%s: Incoming Interface: %s is different than RPF_interface(S) %s", | |
1179 | __PRETTY_FUNCTION__, incoming->name, up->rpf.source_nexthop.interface->name); | |
1180 | return; | |
1181 | } | |
1182 | ||
1183 | // AND JoinDesired(S,G) == TRUE | |
1184 | // FIXME | |
1185 | ||
1186 | // DirectlyConnected(S) == TRUE | |
1187 | if (pim_if_connected_to_source (up->rpf.source_nexthop.interface, up->sg.src)) | |
1188 | { | |
1189 | if (PIM_DEBUG_TRACE) | |
1190 | zlog_debug ("%s: %s is directly connected to the source", __PRETTY_FUNCTION__, | |
8bfb8b67 | 1191 | up->sg_str); |
3a66b17b DS |
1192 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1193 | return; | |
1194 | } | |
1195 | ||
1196 | // OR RPF_interface(S) != RPF_interface(RP(G)) | |
1197 | grpf = RP(up->sg.grp); | |
1198 | if (!grpf || up->rpf.source_nexthop.interface != grpf->source_nexthop.interface) | |
1199 | { | |
1200 | if (PIM_DEBUG_TRACE) | |
1201 | zlog_debug ("%s: %s RPF_interface(S) != RPF_interface(RP(G))", | |
8bfb8b67 | 1202 | __PRETTY_FUNCTION__, up->sg_str); |
3a66b17b DS |
1203 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1204 | return; | |
1205 | } | |
1206 | ||
1207 | // OR inherited_olist(S,G,rpt) == NULL | |
1208 | if (pim_upstream_is_sg_rpt(up) && pim_upstream_empty_inherited_olist(up)) | |
1209 | { | |
1210 | if (PIM_DEBUG_TRACE) | |
1211 | zlog_debug ("%s: %s OR inherited_olist(S,G,rpt) == NULL", __PRETTY_FUNCTION__, | |
8bfb8b67 | 1212 | up->sg_str); |
3a66b17b DS |
1213 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1214 | return; | |
1215 | } | |
1216 | ||
1217 | // OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1218 | // ( RPF'(S,G) != NULL ) ) | |
1219 | if (up->parent && pim_rpf_is_same (&up->rpf, &up->parent->rpf)) | |
1220 | { | |
1221 | if (PIM_DEBUG_TRACE) | |
1222 | zlog_debug ("%s: %s RPF'(S,G) is the same as RPF'(*,G)", __PRETTY_FUNCTION__, | |
8bfb8b67 | 1223 | up->sg_str); |
3a66b17b DS |
1224 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1225 | return; | |
1226 | } | |
1227 | ||
1228 | return; | |
1229 | } | |
80d9c3a0 | 1230 | |
d7259eac | 1231 | const char * |
c9802954 | 1232 | pim_upstream_state2str (enum pim_upstream_state join_state) |
d7259eac | 1233 | { |
c9802954 | 1234 | switch (join_state) |
d7259eac DS |
1235 | { |
1236 | case PIM_UPSTREAM_NOTJOINED: | |
e775c0a4 | 1237 | return "NotJoined"; |
d7259eac DS |
1238 | break; |
1239 | case PIM_UPSTREAM_JOINED: | |
e775c0a4 | 1240 | return "Joined"; |
d7259eac | 1241 | break; |
d7259eac | 1242 | } |
e775c0a4 | 1243 | return "Unknown"; |
d7259eac | 1244 | } |
627ed2a3 | 1245 | |
e0e127b0 | 1246 | const char * |
0c2ebf00 | 1247 | pim_reg_state2str (enum pim_reg_state reg_state, char *state_str) |
e0e127b0 | 1248 | { |
0c2ebf00 | 1249 | switch (reg_state) |
e0e127b0 | 1250 | { |
0c2ebf00 | 1251 | case PIM_REG_NOINFO: |
1252 | strcpy (state_str, "RegNoInfo"); | |
e0e127b0 | 1253 | break; |
0c2ebf00 | 1254 | case PIM_REG_JOIN: |
1255 | strcpy (state_str, "RegJoined"); | |
e0e127b0 | 1256 | break; |
0c2ebf00 | 1257 | case PIM_REG_JOIN_PENDING: |
1258 | strcpy (state_str, "RegJoinPend"); | |
e0e127b0 | 1259 | break; |
0c2ebf00 | 1260 | case PIM_REG_PRUNE: |
1261 | strcpy (state_str, "RegPrune"); | |
e0e127b0 | 1262 | break; |
1263 | default: | |
0c2ebf00 | 1264 | strcpy (state_str, "RegUnknown"); |
e0e127b0 | 1265 | } |
1266 | return state_str; | |
1267 | } | |
1268 | ||
627ed2a3 DS |
1269 | static int |
1270 | pim_upstream_register_stop_timer (struct thread *t) | |
1271 | { | |
4df01a4e | 1272 | struct pim_interface *pim_ifp; |
627ed2a3 DS |
1273 | struct pim_upstream *up; |
1274 | struct pim_rpf *rpg; | |
1275 | struct ip ip_hdr; | |
627ed2a3 DS |
1276 | up = THREAD_ARG (t); |
1277 | ||
1278 | up->t_rs_timer = NULL; | |
1279 | ||
1280 | if (PIM_DEBUG_TRACE) | |
1281 | { | |
0c2ebf00 | 1282 | char state_str[PIM_REG_STATE_STR_LEN]; |
d5ed8a9c | 1283 | zlog_debug ("%s: (S,G)=%s upstream register stop timer %s", |
8bfb8b67 | 1284 | __PRETTY_FUNCTION__, up->sg_str, |
0c2ebf00 | 1285 | pim_reg_state2str(up->reg_state, state_str)); |
627ed2a3 DS |
1286 | } |
1287 | ||
e0e127b0 | 1288 | switch (up->reg_state) |
627ed2a3 | 1289 | { |
0c2ebf00 | 1290 | case PIM_REG_JOIN_PENDING: |
1291 | up->reg_state = PIM_REG_JOIN; | |
bb027ee8 DS |
1292 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); |
1293 | break; | |
0c2ebf00 | 1294 | case PIM_REG_JOIN: |
627ed2a3 | 1295 | break; |
0c2ebf00 | 1296 | case PIM_REG_PRUNE: |
4df01a4e | 1297 | pim_ifp = up->rpf.source_nexthop.interface->info; |
7ef66046 DS |
1298 | if (!pim_ifp) |
1299 | { | |
1300 | if (PIM_DEBUG_TRACE) | |
1301 | zlog_debug ("%s: Interface: %s is not configured for pim", | |
1302 | __PRETTY_FUNCTION__, up->rpf.source_nexthop.interface->name); | |
1303 | return 0; | |
1304 | } | |
0c2ebf00 | 1305 | up->reg_state = PIM_REG_JOIN_PENDING; |
627ed2a3 DS |
1306 | pim_upstream_start_register_stop_timer (up, 1); |
1307 | ||
70e7fda8 DS |
1308 | if (((up->channel_oil->cc.lastused/100) > PIM_KEEPALIVE_PERIOD) && |
1309 | (I_am_RP (up->sg.grp))) | |
1310 | { | |
1311 | if (PIM_DEBUG_TRACE) | |
1312 | zlog_debug ("%s: Stop sending the register, because I am the RP and we haven't seen a packet in a while", __PRETTY_FUNCTION__); | |
1313 | return 0; | |
1314 | } | |
4ed0af70 | 1315 | rpg = RP (up->sg.grp); |
627ed2a3 DS |
1316 | memset (&ip_hdr, 0, sizeof (struct ip)); |
1317 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
1318 | ip_hdr.ip_hl = 5; | |
1319 | ip_hdr.ip_v = 4; | |
4ed0af70 DS |
1320 | ip_hdr.ip_src = up->sg.src; |
1321 | ip_hdr.ip_dst = up->sg.grp; | |
dc686f82 | 1322 | ip_hdr.ip_len = htons (20); |
627ed2a3 | 1323 | // checksum is broken |
4df01a4e | 1324 | pim_register_send ((uint8_t *)&ip_hdr, sizeof (struct ip), |
0e3b3d5d | 1325 | pim_ifp->primary_address, rpg, 1, up); |
627ed2a3 DS |
1326 | break; |
1327 | default: | |
1328 | break; | |
1329 | } | |
1330 | ||
1331 | return 0; | |
1332 | } | |
1333 | ||
1334 | void | |
1335 | pim_upstream_start_register_stop_timer (struct pim_upstream *up, int null_register) | |
1336 | { | |
1337 | uint32_t time; | |
1338 | ||
1339 | if (up->t_rs_timer) | |
1340 | { | |
1341 | THREAD_TIMER_OFF (up->t_rs_timer); | |
1342 | up->t_rs_timer = NULL; | |
1343 | } | |
1344 | ||
1345 | if (!null_register) | |
1346 | { | |
1347 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1348 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1349 | time = lower + (random () % (upper - lower + 1)) - PIM_REGISTER_PROBE_PERIOD; | |
1350 | } | |
1351 | else | |
1352 | time = PIM_REGISTER_PROBE_PERIOD; | |
1353 | ||
1354 | if (PIM_DEBUG_TRACE) | |
1355 | { | |
05e451f8 | 1356 | zlog_debug ("%s: (S,G)=%s Starting upstream register stop timer %d", |
8bfb8b67 | 1357 | __PRETTY_FUNCTION__, up->sg_str, time); |
627ed2a3 DS |
1358 | } |
1359 | THREAD_TIMER_ON (master, up->t_rs_timer, | |
1360 | pim_upstream_register_stop_timer, | |
1361 | up, time); | |
1362 | } | |
4fdc8f36 | 1363 | |
4fdc8f36 | 1364 | int |
b5183fd1 | 1365 | pim_upstream_inherited_olist_decide (struct pim_upstream *up) |
4fdc8f36 | 1366 | { |
219e0013 | 1367 | struct pim_interface *pim_ifp; |
219e0013 DS |
1368 | struct listnode *chnextnode; |
1369 | struct pim_ifchannel *ch; | |
1370 | struct listnode *chnode; | |
219e0013 DS |
1371 | int output_intf = 0; |
1372 | ||
3667b0bc | 1373 | pim_ifp = up->rpf.source_nexthop.interface->info; |
da55afba | 1374 | if (pim_ifp && !up->channel_oil) |
3667b0bc | 1375 | up->channel_oil = pim_channel_oil_add (&up->sg, pim_ifp->mroute_vif_index); |
219e0013 | 1376 | |
ea4a71fc | 1377 | for (ALL_LIST_ELEMENTS (pim_ifchannel_list, chnode, chnextnode, ch)) |
219e0013 | 1378 | { |
ea4a71fc | 1379 | pim_ifp = ch->interface->info; |
7a3ddda5 DS |
1380 | if (!pim_ifp) |
1381 | continue; | |
219e0013 | 1382 | |
ea4a71fc | 1383 | if (pim_upstream_evaluate_join_desired_interface (up, ch)) |
7a3ddda5 | 1384 | { |
781a1745 DS |
1385 | int flag = PIM_OIF_FLAG_PROTO_PIM; |
1386 | ||
1387 | if (ch->sg.src.s_addr == INADDR_ANY && ch->upstream != up) | |
1388 | flag = PIM_OIF_FLAG_PROTO_STAR; | |
1389 | pim_channel_add_oif (up->channel_oil, ch->interface, flag); | |
ea4a71fc | 1390 | output_intf++; |
219e0013 DS |
1391 | } |
1392 | } | |
1393 | ||
b5183fd1 DS |
1394 | return output_intf; |
1395 | } | |
1396 | ||
1397 | /* | |
1398 | * For a given upstream, determine the inherited_olist | |
1399 | * and apply it. | |
1400 | * | |
1401 | * inherited_olist(S,G,rpt) = | |
1402 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1403 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1404 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1405 | * | |
1406 | * inherited_olist(S,G) = | |
1407 | * inherited_olist(S,G,rpt) (+) | |
1408 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1409 | * | |
1410 | * return 1 if there are any output interfaces | |
1411 | * return 0 if there are not any output interfaces | |
1412 | */ | |
1413 | int | |
1414 | pim_upstream_inherited_olist (struct pim_upstream *up) | |
1415 | { | |
1416 | int output_intf = pim_upstream_inherited_olist_decide (up); | |
1417 | ||
483eef9d DS |
1418 | /* |
1419 | * If we have output_intf switch state to Join and work like normal | |
1420 | * If we don't have an output_intf that means we are probably a | |
1421 | * switch on a stick so turn on forwarding to just accept the | |
1422 | * incoming packets so we don't bother the other stuff! | |
1423 | */ | |
1424 | if (output_intf) | |
1425 | pim_upstream_switch (up, PIM_UPSTREAM_JOINED); | |
1426 | else | |
1427 | forward_on (up); | |
219e0013 DS |
1428 | |
1429 | return output_intf; | |
4fdc8f36 | 1430 | } |
d3dd1804 | 1431 | |
80d9c3a0 DS |
1432 | int |
1433 | pim_upstream_empty_inherited_olist (struct pim_upstream *up) | |
1434 | { | |
ce0ddb4e | 1435 | return pim_channel_oil_empty (up->channel_oil); |
80d9c3a0 DS |
1436 | } |
1437 | ||
d3dd1804 DS |
1438 | /* |
1439 | * When we have a new neighbor, | |
1440 | * find upstreams that don't have their rpf_addr | |
1441 | * set and see if the new neighbor allows | |
1442 | * the join to be sent | |
1443 | */ | |
1444 | void | |
1445 | pim_upstream_find_new_rpf (void) | |
1446 | { | |
1447 | struct listnode *up_node; | |
1448 | struct listnode *up_nextnode; | |
1449 | struct pim_upstream *up; | |
1450 | ||
1451 | /* | |
0f588989 DS |
1452 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr |
1453 | */ | |
1454 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) | |
d3dd1804 | 1455 | { |
63c59d0c | 1456 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) |
d3dd1804 | 1457 | { |
3197cb1e | 1458 | if (PIM_DEBUG_TRACE) |
d3dd1804 | 1459 | zlog_debug ("Upstream %s without a path to send join, checking", |
8bfb8b67 | 1460 | up->sg_str); |
1bc98276 | 1461 | pim_rpf_update (up, NULL, 1); |
d3dd1804 DS |
1462 | } |
1463 | } | |
1464 | } | |
0f588989 | 1465 | |
0f588989 DS |
1466 | static unsigned int |
1467 | pim_upstream_hash_key (void *arg) | |
1468 | { | |
1469 | struct pim_upstream *up = (struct pim_upstream *)arg; | |
1470 | ||
1471 | return jhash_2words (up->sg.src.s_addr, up->sg.grp.s_addr, 0); | |
1472 | } | |
1473 | ||
1474 | void pim_upstream_terminate (void) | |
1475 | { | |
1476 | if (pim_upstream_list) | |
693c9259 | 1477 | list_delete (pim_upstream_list); |
0f588989 DS |
1478 | pim_upstream_list = NULL; |
1479 | ||
1480 | if (pim_upstream_hash) | |
1481 | hash_free (pim_upstream_hash); | |
693c9259 | 1482 | pim_upstream_hash = NULL; |
0f588989 DS |
1483 | } |
1484 | ||
1485 | static int | |
1486 | pim_upstream_equal (const void *arg1, const void *arg2) | |
1487 | { | |
1488 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; | |
1489 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
1490 | ||
1491 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) && | |
1492 | (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
1493 | return 1; | |
1494 | ||
1495 | return 0; | |
1496 | } | |
1497 | ||
1bf16443 | 1498 | /* rfc4601:section-4.2:"Data Packet Forwarding Rules" defines |
1499 | * the cases where kat has to be restarted on rxing traffic - | |
1500 | * | |
1501 | * if( DirectlyConnected(S) == TRUE AND iif == RPF_interface(S) ) { | |
1502 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1503 | * # Note: a register state transition or UpstreamJPState(S,G) | |
1504 | * # transition may happen as a result of restarting | |
1505 | * # KeepaliveTimer, and must be dealt with here. | |
1506 | * } | |
1507 | * if( iif == RPF_interface(S) AND UpstreamJPState(S,G) == Joined AND | |
1508 | * inherited_olist(S,G) != NULL ) { | |
1509 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1510 | * } | |
1511 | */ | |
1512 | static bool pim_upstream_kat_start_ok(struct pim_upstream *up) | |
1513 | { | |
1514 | /* "iif == RPF_interface(S)" check has to be done by the kernel or hw | |
1515 | * so we will skip that here */ | |
1516 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1517 | up->sg.src)) { | |
1518 | return true; | |
1519 | } | |
1520 | ||
1521 | if ((up->join_state == PIM_UPSTREAM_JOINED) && | |
1522 | !pim_upstream_empty_inherited_olist(up)) { | |
1523 | /* XXX: I have added this RP check just for 3.2 and it's a digression from | |
1524 | * what rfc-4601 says. Till now we were only running KAT on FHR and RP and | |
1525 | * there is some angst around making the change to run it all routers that | |
1526 | * maintain the (S, G) state. This is tracked via CM-13601 and MUST be | |
1527 | * removed to handle spt turn-arounds correctly in a 3-tier clos */ | |
1528 | if (I_am_RP (up->sg.grp)) | |
1529 | return true; | |
1530 | } | |
1531 | ||
1532 | return false; | |
1533 | } | |
1534 | ||
9c5e4d62 DS |
1535 | /* |
1536 | * Code to check and see if we've received packets on a S,G mroute | |
1537 | * and if so to set the SPT bit appropriately | |
1538 | */ | |
1539 | static void | |
1540 | pim_upstream_sg_running (void *arg) | |
1541 | { | |
1542 | struct pim_upstream *up = (struct pim_upstream *)arg; | |
e43b8697 DS |
1543 | |
1544 | // No packet can have arrived here if this is the case | |
1545 | if (!up->channel_oil || !up->channel_oil->installed) | |
1546 | { | |
1547 | if (PIM_DEBUG_TRACE) | |
1548 | zlog_debug ("%s: %s is not installed in mroute", | |
8bfb8b67 | 1549 | __PRETTY_FUNCTION__, up->sg_str); |
e43b8697 DS |
1550 | return; |
1551 | } | |
1552 | ||
bfdf4096 DS |
1553 | /* |
1554 | * This is a bit of a hack | |
1555 | * We've noted that we should rescan but | |
1556 | * we've missed the window for doing so in | |
1557 | * pim_zebra.c for some reason. I am | |
1558 | * only doing this at this point in time | |
1559 | * to get us up and working for the moment | |
1560 | */ | |
1561 | if (up->channel_oil->oil_inherited_rescan) | |
1562 | { | |
1563 | if (PIM_DEBUG_TRACE) | |
1564 | zlog_debug ("%s: Handling unscanned inherited_olist for %s", __PRETTY_FUNCTION__, up->sg_str); | |
1565 | pim_upstream_inherited_olist_decide (up); | |
1566 | up->channel_oil->oil_inherited_rescan = 0; | |
1567 | } | |
e43b8697 DS |
1568 | pim_mroute_update_counters (up->channel_oil); |
1569 | ||
1570 | // Have we seen packets? | |
1bf16443 | 1571 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) && |
e43b8697 DS |
1572 | (up->channel_oil->cc.lastused/100 > 30)) |
1573 | { | |
1574 | if (PIM_DEBUG_TRACE) | |
1575 | { | |
eeedae06 DS |
1576 | zlog_debug ("%s: %s old packet count is equal or lastused is greater than 30, (%ld,%ld,%lld)", |
1577 | __PRETTY_FUNCTION__, up->sg_str, | |
1578 | up->channel_oil->cc.oldpktcnt, | |
1579 | up->channel_oil->cc.pktcnt, | |
1580 | up->channel_oil->cc.lastused/100); | |
e43b8697 DS |
1581 | } |
1582 | return; | |
1583 | } | |
1584 | ||
1bf16443 | 1585 | if (pim_upstream_kat_start_ok(up)) { |
1586 | /* Add a source reference to the stream if | |
1587 | * one doesn't already exist */ | |
1588 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) | |
1589 | { | |
1590 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 DS |
1591 | zlog_debug ("source reference created on kat restart %s", up->sg_str); |
1592 | ||
1bf16443 | 1593 | pim_upstream_ref(up, PIM_UPSTREAM_FLAG_MASK_SRC_STREAM); |
1594 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); | |
1595 | pim_upstream_fhr_kat_start(up); | |
1596 | } | |
1597 | pim_upstream_keep_alive_timer_start(up, qpim_keep_alive_time); | |
1598 | } | |
1599 | ||
1600 | if (up->sptbit != PIM_UPSTREAM_SPTBIT_TRUE) | |
1601 | { | |
1602 | pim_upstream_set_sptbit(up, up->rpf.source_nexthop.interface); | |
1603 | } | |
e43b8697 | 1604 | return; |
9c5e4d62 DS |
1605 | } |
1606 | ||
040d86ad DS |
1607 | void |
1608 | pim_upstream_init (void) | |
0f588989 | 1609 | { |
9c5e4d62 DS |
1610 | pim_upstream_sg_wheel = wheel_init (master, 31000, 100, |
1611 | pim_upstream_hash_key, | |
1612 | pim_upstream_sg_running); | |
0f588989 DS |
1613 | pim_upstream_hash = hash_create_size (8192, pim_upstream_hash_key, |
1614 | pim_upstream_equal); | |
1615 | ||
1616 | pim_upstream_list = list_new (); | |
1617 | pim_upstream_list->del = (void (*)(void *)) pim_upstream_free; | |
03417ccd | 1618 | pim_upstream_list->cmp = pim_upstream_compare; |
0f588989 DS |
1619 | |
1620 | } |