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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 | |
19 | ||
12e41d03 DL |
20 | */ |
21 | ||
22 | #include <zebra.h> | |
23 | ||
24 | #include "zebra/rib.h" | |
25 | ||
26 | #include "log.h" | |
27 | #include "zclient.h" | |
28 | #include "memory.h" | |
29 | #include "thread.h" | |
30 | #include "linklist.h" | |
dfe43e25 DW |
31 | #include "vty.h" |
32 | #include "plist.h" | |
0f588989 DS |
33 | #include "hash.h" |
34 | #include "jhash.h" | |
9c5e4d62 | 35 | #include "wheel.h" |
12e41d03 DL |
36 | |
37 | #include "pimd.h" | |
38 | #include "pim_pim.h" | |
39 | #include "pim_str.h" | |
40 | #include "pim_time.h" | |
41 | #include "pim_iface.h" | |
42 | #include "pim_join.h" | |
43 | #include "pim_zlookup.h" | |
44 | #include "pim_upstream.h" | |
45 | #include "pim_ifchannel.h" | |
46 | #include "pim_neighbor.h" | |
47 | #include "pim_rpf.h" | |
48 | #include "pim_zebra.h" | |
49 | #include "pim_oil.h" | |
50 | #include "pim_macro.h" | |
8f5f5e91 | 51 | #include "pim_rp.h" |
f14248dd | 52 | #include "pim_br.h" |
627ed2a3 | 53 | #include "pim_register.h" |
3c72d654 | 54 | #include "pim_msdp.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 | |
12e41d03 DL |
60 | static void join_timer_start(struct pim_upstream *up); |
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 | ||
3c72d654 | 115 | void |
116 | pim_upstream_set_created_by_upstream(struct pim_upstream *up) | |
117 | { | |
118 | PIM_UPSTREAM_FLAG_SET_CREATED_BY_UPSTREAM(up->flags); | |
119 | pim_msdp_sa_local_add(&up->sg); | |
120 | } | |
121 | ||
122 | static void | |
123 | pim_upstream_unset_created_by_upstream(struct pim_upstream *up) | |
124 | { | |
125 | PIM_UPSTREAM_FLAG_UNSET_CREATED_BY_UPSTREAM(up->flags); | |
126 | pim_msdp_sa_local_del(&up->sg); | |
127 | } | |
128 | ||
4d99418b DS |
129 | /* |
130 | * If we have a (*,*) || (S,*) there is no parent | |
131 | * If we have a (S,G), find the (*,G) | |
132 | * If we have a (*,G), find the (*,*) | |
133 | */ | |
134 | static struct pim_upstream * | |
03417ccd | 135 | pim_upstream_find_parent (struct pim_upstream *child) |
4d99418b | 136 | { |
03417ccd DS |
137 | struct prefix_sg any = child->sg; |
138 | struct pim_upstream *up = NULL; | |
4d99418b DS |
139 | |
140 | // (S,G) | |
03417ccd DS |
141 | if ((child->sg.src.s_addr != INADDR_ANY) && |
142 | (child->sg.grp.s_addr != INADDR_ANY)) | |
4d99418b | 143 | { |
4ed0af70 | 144 | any.src.s_addr = INADDR_ANY; |
03417ccd DS |
145 | up = pim_upstream_find (&any); |
146 | ||
147 | if (up) | |
148 | listnode_add (up->sources, child); | |
149 | ||
150 | return up; | |
4d99418b DS |
151 | } |
152 | ||
03417ccd | 153 | return NULL; |
4d99418b DS |
154 | } |
155 | ||
12e41d03 DL |
156 | void pim_upstream_free(struct pim_upstream *up) |
157 | { | |
158 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
159 | } | |
160 | ||
161 | static void upstream_channel_oil_detach(struct pim_upstream *up) | |
162 | { | |
163 | if (up->channel_oil) { | |
164 | pim_channel_oil_del(up->channel_oil); | |
25a335e0 | 165 | up->channel_oil = NULL; |
12e41d03 DL |
166 | } |
167 | } | |
168 | ||
e5905a3b DS |
169 | void |
170 | pim_upstream_del(struct pim_upstream *up, const char *name) | |
12e41d03 | 171 | { |
e5905a3b DS |
172 | if (PIM_DEBUG_PIM_TRACE) |
173 | { | |
174 | zlog_debug ("%s: Delete (%s) ref count: %d", | |
175 | name, pim_str_sg_dump (&up->sg), up->ref_count); | |
176 | } | |
177 | --up->ref_count; | |
178 | ||
179 | if (up->ref_count >= 1) | |
180 | return; | |
181 | ||
594a78cc DS |
182 | if (PIM_DEBUG_PIM_TRACE) |
183 | zlog_debug ("%s: %s is being deleted", | |
184 | __PRETTY_FUNCTION__, | |
185 | pim_str_sg_dump (&up->sg)); | |
12e41d03 | 186 | THREAD_OFF(up->t_join_timer); |
f14248dd | 187 | THREAD_OFF(up->t_ka_timer); |
792f4d29 | 188 | THREAD_OFF(up->t_rs_timer); |
12e41d03 | 189 | |
9c5e4d62 DS |
190 | if (up->sg.src.s_addr != INADDR_ANY) |
191 | wheel_remove_item (pim_upstream_sg_wheel, up); | |
192 | ||
3c72d654 | 193 | pim_msdp_sa_local_del(&up->sg); |
cfa91a87 | 194 | pim_upstream_remove_children (up); |
7fe1f662 | 195 | pim_mroute_del (up->channel_oil); |
12e41d03 DL |
196 | upstream_channel_oil_detach(up); |
197 | ||
03417ccd DS |
198 | if (up->sources) |
199 | list_delete (up->sources); | |
200 | up->sources = NULL; | |
201 | ||
12e41d03 DL |
202 | /* |
203 | notice that listnode_delete() can't be moved | |
204 | into pim_upstream_free() because the later is | |
205 | called by list_delete_all_node() | |
206 | */ | |
03417ccd DS |
207 | if (up->parent) |
208 | { | |
209 | listnode_delete (up->parent->sources, up); | |
210 | up->parent = NULL; | |
211 | } | |
0f588989 DS |
212 | listnode_delete (pim_upstream_list, up); |
213 | hash_release (pim_upstream_hash, up); | |
12e41d03 DL |
214 | |
215 | pim_upstream_free(up); | |
216 | } | |
217 | ||
56638739 DS |
218 | void |
219 | pim_upstream_send_join (struct pim_upstream *up) | |
12e41d03 | 220 | { |
12e41d03 | 221 | if (PIM_DEBUG_PIM_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__, |
c9802954 | 225 | pim_str_sg_dump (&up->sg), 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__, |
05e451f8 | 230 | pim_str_sg_dump (&up->sg), rpf_str); |
12e41d03 DL |
231 | /* warning only */ |
232 | } | |
233 | } | |
56638739 | 234 | |
12e41d03 DL |
235 | /* send Join(S,G) to the current upstream neighbor */ |
236 | pim_joinprune_send(up->rpf.source_nexthop.interface, | |
63c59d0c | 237 | up->rpf.rpf_addr.u.prefix4, |
372eab92 | 238 | up, |
12e41d03 DL |
239 | 1 /* join */); |
240 | } | |
241 | ||
242 | static int on_join_timer(struct thread *t) | |
243 | { | |
244 | struct pim_upstream *up; | |
245 | ||
12e41d03 | 246 | up = THREAD_ARG(t); |
12e41d03 | 247 | |
bb6e291f DS |
248 | up->t_join_timer = NULL; |
249 | ||
250 | /* | |
251 | * In the case of a HFR we will not ahve anyone to send this to. | |
252 | */ | |
0bf27c5c | 253 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
bb6e291f DS |
254 | return 0; |
255 | ||
eb345962 DS |
256 | /* |
257 | * Don't send the join if the outgoing interface is a loopback | |
258 | * But since this might change leave the join timer running | |
259 | */ | |
260 | if (!if_is_loopback (up->rpf.source_nexthop.interface)) | |
261 | pim_upstream_send_join (up); | |
12e41d03 | 262 | |
12e41d03 DL |
263 | join_timer_start(up); |
264 | ||
265 | return 0; | |
266 | } | |
267 | ||
268 | static void join_timer_start(struct pim_upstream *up) | |
269 | { | |
270 | if (PIM_DEBUG_PIM_EVENTS) { | |
05e451f8 | 271 | zlog_debug("%s: starting %d sec timer for upstream (S,G)=%s", |
12e41d03 DL |
272 | __PRETTY_FUNCTION__, |
273 | qpim_t_periodic, | |
05e451f8 | 274 | pim_str_sg_dump (&up->sg)); |
12e41d03 DL |
275 | } |
276 | ||
8e38a2cf | 277 | THREAD_OFF (up->t_join_timer); |
12e41d03 DL |
278 | THREAD_TIMER_ON(master, up->t_join_timer, |
279 | on_join_timer, | |
280 | up, qpim_t_periodic); | |
281 | } | |
282 | ||
283 | void pim_upstream_join_timer_restart(struct pim_upstream *up) | |
284 | { | |
285 | THREAD_OFF(up->t_join_timer); | |
286 | join_timer_start(up); | |
287 | } | |
288 | ||
289 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
290 | int interval_msec) | |
291 | { | |
292 | if (PIM_DEBUG_PIM_EVENTS) { | |
05e451f8 | 293 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", |
12e41d03 DL |
294 | __PRETTY_FUNCTION__, |
295 | interval_msec, | |
05e451f8 | 296 | pim_str_sg_dump (&up->sg)); |
12e41d03 DL |
297 | } |
298 | ||
299 | THREAD_OFF(up->t_join_timer); | |
300 | THREAD_TIMER_MSEC_ON(master, up->t_join_timer, | |
301 | on_join_timer, | |
302 | up, interval_msec); | |
303 | } | |
304 | ||
305 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
306 | struct in_addr rpf_addr, | |
307 | int holdtime) | |
308 | { | |
309 | long t_joinsuppress_msec; | |
310 | long join_timer_remain_msec; | |
311 | ||
312 | t_joinsuppress_msec = MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
313 | 1000 * holdtime); | |
314 | ||
315 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
316 | ||
317 | if (PIM_DEBUG_PIM_TRACE) { | |
eaa54bdb | 318 | char rpf_str[INET_ADDRSTRLEN]; |
12e41d03 | 319 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 320 | zlog_debug("%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", |
12e41d03 | 321 | __FILE__, __PRETTY_FUNCTION__, |
05e451f8 | 322 | pim_str_sg_dump (&up->sg), |
12e41d03 DL |
323 | rpf_str, |
324 | join_timer_remain_msec, t_joinsuppress_msec); | |
325 | } | |
326 | ||
327 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
328 | if (PIM_DEBUG_PIM_TRACE) { | |
05e451f8 | 329 | zlog_debug("%s %s: suppressing Join(S,G)=%s for %ld msec", |
12e41d03 | 330 | __FILE__, __PRETTY_FUNCTION__, |
05e451f8 | 331 | pim_str_sg_dump (&up->sg), t_joinsuppress_msec); |
12e41d03 DL |
332 | } |
333 | ||
334 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
335 | } | |
336 | } | |
337 | ||
338 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
339 | struct pim_upstream *up, | |
340 | struct in_addr rpf_addr) | |
341 | { | |
342 | long join_timer_remain_msec; | |
343 | int t_override_msec; | |
344 | ||
345 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
346 | t_override_msec = pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
347 | ||
348 | if (PIM_DEBUG_PIM_TRACE) { | |
eaa54bdb | 349 | char rpf_str[INET_ADDRSTRLEN]; |
12e41d03 | 350 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 351 | zlog_debug("%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", |
12e41d03 | 352 | debug_label, |
05e451f8 | 353 | pim_str_sg_dump (&up->sg), rpf_str, |
12e41d03 DL |
354 | join_timer_remain_msec, t_override_msec); |
355 | } | |
356 | ||
357 | if (join_timer_remain_msec > t_override_msec) { | |
358 | if (PIM_DEBUG_PIM_TRACE) { | |
05e451f8 | 359 | zlog_debug("%s: decreasing (S,G)=%s join timer to t_override=%d msec", |
12e41d03 | 360 | debug_label, |
05e451f8 | 361 | pim_str_sg_dump (&up->sg), |
12e41d03 DL |
362 | t_override_msec); |
363 | } | |
364 | ||
365 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
366 | } | |
367 | } | |
368 | ||
369 | static void forward_on(struct pim_upstream *up) | |
370 | { | |
12e41d03 DL |
371 | struct listnode *chnode; |
372 | struct listnode *chnextnode; | |
12e41d03 DL |
373 | struct pim_interface *pim_ifp; |
374 | struct pim_ifchannel *ch; | |
375 | ||
ea4a71fc DS |
376 | /* scan (S,G) state */ |
377 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
378 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
379 | if (!pim_ifp) |
380 | continue; | |
381 | ||
ea4a71fc DS |
382 | if (ch->upstream != up) |
383 | continue; | |
12e41d03 | 384 | |
ea4a71fc DS |
385 | if (pim_macro_chisin_oiflist(ch)) |
386 | pim_forward_start(ch); | |
12e41d03 | 387 | |
ea4a71fc | 388 | } /* scan iface channel list */ |
12e41d03 DL |
389 | } |
390 | ||
391 | static void forward_off(struct pim_upstream *up) | |
392 | { | |
12e41d03 DL |
393 | struct listnode *chnode; |
394 | struct listnode *chnextnode; | |
12e41d03 DL |
395 | struct pim_interface *pim_ifp; |
396 | struct pim_ifchannel *ch; | |
397 | ||
ea4a71fc DS |
398 | /* scan per-interface (S,G) state */ |
399 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
400 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
401 | if (!pim_ifp) |
402 | continue; | |
403 | ||
ea4a71fc DS |
404 | if (ch->upstream != up) |
405 | continue; | |
12e41d03 | 406 | |
ea4a71fc | 407 | pim_forward_stop(ch); |
12e41d03 | 408 | |
ea4a71fc | 409 | } /* scan iface channel list */ |
12e41d03 DL |
410 | } |
411 | ||
bb6e291f DS |
412 | static int |
413 | pim_upstream_could_register (struct pim_upstream *up) | |
414 | { | |
415 | struct pim_interface *pim_ifp = up->rpf.source_nexthop.interface->info; | |
416 | ||
35917570 | 417 | if (pim_ifp && PIM_I_am_DR (pim_ifp) && |
bb6e291f DS |
418 | pim_if_connected_to_source (up->rpf.source_nexthop.interface, up->sg.src)) |
419 | return 1; | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
7fcdfb34 DS |
424 | void |
425 | pim_upstream_switch(struct pim_upstream *up, | |
426 | enum pim_upstream_state new_state) | |
12e41d03 DL |
427 | { |
428 | enum pim_upstream_state old_state = up->join_state; | |
429 | ||
12e41d03 | 430 | if (PIM_DEBUG_PIM_EVENTS) { |
c9802954 | 431 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", |
12e41d03 | 432 | __PRETTY_FUNCTION__, |
c9802954 DS |
433 | pim_str_sg_dump (&up->sg), |
434 | pim_upstream_state2str (up->join_state), | |
435 | pim_upstream_state2str (new_state)); | |
12e41d03 DL |
436 | } |
437 | ||
bb027ee8 DS |
438 | /* |
439 | * This code still needs work. | |
440 | */ | |
441 | switch (up->join_state) | |
442 | { | |
443 | case PIM_UPSTREAM_PRUNE: | |
0bf27c5c | 444 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
7747bad6 DS |
445 | { |
446 | up->join_state = new_state; | |
447 | up->state_transition = pim_time_monotonic_sec (); | |
448 | } | |
449 | break; | |
bb027ee8 DS |
450 | case PIM_UPSTREAM_JOIN_PENDING: |
451 | break; | |
452 | case PIM_UPSTREAM_NOTJOINED: | |
453 | case PIM_UPSTREAM_JOINED: | |
454 | up->join_state = new_state; | |
e5b6b229 DS |
455 | if (old_state != new_state) |
456 | up->state_transition = pim_time_monotonic_sec(); | |
bb027ee8 DS |
457 | |
458 | break; | |
459 | } | |
460 | ||
12e41d03 DL |
461 | pim_upstream_update_assert_tracking_desired(up); |
462 | ||
463 | if (new_state == PIM_UPSTREAM_JOINED) { | |
81900c5a DS |
464 | if (old_state != PIM_UPSTREAM_JOINED) |
465 | { | |
0bf27c5c | 466 | int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags); |
81900c5a | 467 | forward_on(up); |
0bf27c5c | 468 | if (pim_upstream_could_register (up)) |
bb6e291f | 469 | { |
0bf27c5c | 470 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); |
a9b59879 | 471 | if (!old_fhr && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) |
bb6e291f DS |
472 | { |
473 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); | |
474 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
475 | } | |
476 | } | |
477 | else | |
478 | { | |
479 | pim_upstream_send_join (up); | |
480 | join_timer_start (up); | |
481 | } | |
81900c5a DS |
482 | } |
483 | else | |
484 | { | |
485 | forward_on (up); | |
486 | } | |
12e41d03 DL |
487 | } |
488 | else { | |
489 | forward_off(up); | |
490 | pim_joinprune_send(up->rpf.source_nexthop.interface, | |
63c59d0c | 491 | up->rpf.rpf_addr.u.prefix4, |
372eab92 | 492 | up, |
12e41d03 | 493 | 0 /* prune */); |
7fcdfb34 DS |
494 | if (up->t_join_timer) |
495 | THREAD_OFF(up->t_join_timer); | |
12e41d03 | 496 | } |
12e41d03 DL |
497 | } |
498 | ||
03417ccd DS |
499 | static int |
500 | pim_upstream_compare (void *arg1, void *arg2) | |
501 | { | |
502 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; | |
503 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
504 | ||
505 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) | |
506 | return -1; | |
507 | ||
508 | if (ntohl(up1->sg.grp.s_addr) > ntohl(up2->sg.grp.s_addr)) | |
509 | return 1; | |
510 | ||
511 | if (ntohl(up1->sg.src.s_addr) < ntohl(up2->sg.src.s_addr)) | |
512 | return -1; | |
513 | ||
514 | if (ntohl(up1->sg.src.s_addr) > ntohl(up2->sg.src.s_addr)) | |
515 | return 1; | |
516 | ||
517 | return 0; | |
518 | } | |
519 | ||
4ed0af70 | 520 | static struct pim_upstream *pim_upstream_new(struct prefix_sg *sg, |
4a40c37a DS |
521 | struct interface *incoming, |
522 | int flags) | |
12e41d03 DL |
523 | { |
524 | struct pim_upstream *up; | |
2f702571 | 525 | enum pim_rpf_result rpf_result; |
12e41d03 | 526 | |
36d9e7dc | 527 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); |
12e41d03 | 528 | if (!up) { |
36d9e7dc | 529 | zlog_err("%s: PIM XCALLOC(%zu) failure", |
12e41d03 | 530 | __PRETTY_FUNCTION__, sizeof(*up)); |
8f5f5e91 | 531 | return NULL; |
12e41d03 DL |
532 | } |
533 | ||
5074a423 | 534 | up->sg = *sg; |
0f588989 | 535 | up = hash_get (pim_upstream_hash, up, hash_alloc_intern); |
36d6bd7d | 536 | if (!pim_rp_set_upstream_addr (&up->upstream_addr, sg->src, sg->grp)) |
8f5f5e91 DS |
537 | { |
538 | if (PIM_DEBUG_PIM_TRACE) | |
539 | zlog_debug("%s: Received a (*,G) with no RP configured", __PRETTY_FUNCTION__); | |
540 | ||
03417ccd | 541 | hash_release (pim_upstream_hash, up); |
8f5f5e91 DS |
542 | XFREE (MTYPE_PIM_UPSTREAM, up); |
543 | return NULL; | |
544 | } | |
545 | ||
03417ccd DS |
546 | up->parent = pim_upstream_find_parent (up); |
547 | if (up->sg.src.s_addr == INADDR_ANY) | |
548 | { | |
549 | up->sources = list_new (); | |
550 | up->sources->cmp = pim_upstream_compare; | |
551 | } | |
552 | else | |
553 | up->sources = NULL; | |
554 | ||
cfa91a87 | 555 | pim_upstream_find_new_children (up); |
4a40c37a | 556 | up->flags = flags; |
12e41d03 | 557 | up->ref_count = 1; |
4a4c4a07 DS |
558 | up->t_join_timer = NULL; |
559 | up->t_ka_timer = NULL; | |
792f4d29 | 560 | up->t_rs_timer = NULL; |
12e41d03 DL |
561 | up->join_state = 0; |
562 | up->state_transition = pim_time_monotonic_sec(); | |
4a4c4a07 | 563 | up->channel_oil = NULL; |
f9e0ab5b | 564 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; |
12e41d03 | 565 | |
f24405b1 | 566 | up->rpf.source_nexthop.interface = NULL; |
63c59d0c DS |
567 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; |
568 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
12e41d03 DL |
569 | up->rpf.source_nexthop.mrib_metric_preference = qpim_infinite_assert_metric.metric_preference; |
570 | up->rpf.source_nexthop.mrib_route_metric = qpim_infinite_assert_metric.route_metric; | |
63c59d0c DS |
571 | up->rpf.rpf_addr.family = AF_INET; |
572 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
12e41d03 | 573 | |
9c5e4d62 DS |
574 | if (up->sg.src.s_addr != INADDR_ANY) |
575 | wheel_add_item (pim_upstream_sg_wheel, up); | |
576 | ||
d3dd1804 | 577 | rpf_result = pim_rpf_update(up, NULL); |
2f702571 | 578 | if (rpf_result == PIM_RPF_FAILURE) { |
4a40c37a DS |
579 | if (PIM_DEBUG_PIM_TRACE) |
580 | zlog_debug ("%s: Attempting to create upstream(%s), Unable to RPF for source", __PRETTY_FUNCTION__, | |
581 | pim_str_sg_dump (&up->sg)); | |
03417ccd DS |
582 | |
583 | if (up->parent) | |
584 | { | |
585 | listnode_delete (up->parent->sources, up); | |
586 | up->parent = NULL; | |
587 | } | |
9c5e4d62 DS |
588 | |
589 | if (up->sg.src.s_addr != INADDR_ANY) | |
590 | wheel_remove_item (pim_upstream_sg_wheel, up); | |
591 | ||
03417ccd DS |
592 | pim_upstream_remove_children (up); |
593 | if (up->sources) | |
594 | list_delete (up->sources); | |
595 | ||
596 | hash_release (pim_upstream_hash, up); | |
2f702571 DS |
597 | XFREE(MTYPE_PIM_UPSTREAM, up); |
598 | return NULL; | |
599 | } | |
12e41d03 | 600 | |
0f588989 | 601 | listnode_add_sort(pim_upstream_list, up); |
12e41d03 | 602 | |
03417ccd DS |
603 | if (PIM_DEBUG_PIM_TRACE) |
604 | zlog_debug ("%s: Created Upstream %s", __PRETTY_FUNCTION__, pim_str_sg_dump (&up->sg)); | |
605 | ||
12e41d03 DL |
606 | return up; |
607 | } | |
608 | ||
4ed0af70 | 609 | struct pim_upstream *pim_upstream_find(struct prefix_sg *sg) |
12e41d03 | 610 | { |
0f588989 DS |
611 | struct pim_upstream lookup; |
612 | struct pim_upstream *up = NULL; | |
12e41d03 | 613 | |
0f588989 DS |
614 | lookup.sg = *sg; |
615 | up = hash_lookup (pim_upstream_hash, &lookup); | |
616 | return up; | |
12e41d03 DL |
617 | } |
618 | ||
4ed0af70 | 619 | struct pim_upstream *pim_upstream_add(struct prefix_sg *sg, |
4a40c37a | 620 | struct interface *incoming, |
e5905a3b | 621 | int flags, const char *name) |
12e41d03 | 622 | { |
594a78cc | 623 | struct pim_upstream *up = NULL; |
e5905a3b | 624 | int found = 0; |
5074a423 | 625 | up = pim_upstream_find(sg); |
12e41d03 DL |
626 | if (up) { |
627 | ++up->ref_count; | |
16b72591 | 628 | up->flags |= flags; |
e5905a3b | 629 | found = 1; |
12e41d03 DL |
630 | } |
631 | else { | |
4a40c37a | 632 | up = pim_upstream_new(sg, incoming, flags); |
12e41d03 DL |
633 | } |
634 | ||
e5905a3b | 635 | if (PIM_DEBUG_TRACE) |
f4075cb4 DS |
636 | { |
637 | if (up) | |
638 | zlog_debug("%s(%s): (%s), found: %d: ref_count: %d", | |
639 | __PRETTY_FUNCTION__, name, | |
640 | pim_str_sg_dump (&up->sg), found, | |
641 | up->ref_count); | |
642 | else | |
643 | zlog_debug("%s(%s): (%s) failure to create", | |
644 | __PRETTY_FUNCTION__, name, | |
645 | pim_str_sg_dump (sg)); | |
646 | } | |
12e41d03 | 647 | |
e5905a3b | 648 | return up; |
12e41d03 DL |
649 | } |
650 | ||
7a3ddda5 DS |
651 | static int |
652 | pim_upstream_evaluate_join_desired_interface (struct pim_upstream *up, | |
653 | struct pim_ifchannel *ch) | |
654 | { | |
655 | struct pim_upstream *parent = up->parent; | |
656 | ||
657 | if (ch->upstream == up) | |
658 | { | |
659 | if (!pim_macro_ch_lost_assert(ch) && pim_macro_chisin_joins_or_include(ch)) | |
660 | return 1; | |
661 | } | |
662 | /* | |
663 | * joins (*,G) | |
664 | */ | |
665 | if (parent && ch->upstream == parent) | |
666 | { | |
667 | if (!pim_macro_ch_lost_assert (ch) && pim_macro_chisin_joins_or_include (ch)) | |
668 | return 1; | |
669 | } | |
670 | ||
671 | return 0; | |
672 | } | |
673 | ||
12e41d03 DL |
674 | /* |
675 | Evaluate JoinDesired(S,G): | |
676 | ||
677 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
678 | in the set: | |
679 | ||
680 | inherited_olist(S,G) = | |
681 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
682 | ||
683 | JoinDesired(S,G) may be affected by changes in the following: | |
684 | ||
685 | pim_ifp->primary_address | |
686 | pim_ifp->pim_dr_addr | |
687 | ch->ifassert_winner_metric | |
688 | ch->ifassert_winner | |
689 | ch->local_ifmembership | |
690 | ch->ifjoin_state | |
691 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
692 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
693 | ch->upstream->rpf.source_nexthop.interface | |
694 | ||
695 | See also pim_upstream_update_join_desired() below. | |
696 | */ | |
697 | int pim_upstream_evaluate_join_desired(struct pim_upstream *up) | |
698 | { | |
12e41d03 DL |
699 | struct listnode *chnode; |
700 | struct listnode *chnextnode; | |
12e41d03 DL |
701 | struct pim_interface *pim_ifp; |
702 | struct pim_ifchannel *ch; | |
7a3ddda5 | 703 | int ret = 0; |
12e41d03 | 704 | |
ea4a71fc DS |
705 | /* scan per-interface (S,G) state */ |
706 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) | |
707 | { | |
708 | pim_ifp = ch->interface->info; | |
709 | if (!pim_ifp) | |
710 | continue; | |
12e41d03 | 711 | |
ea4a71fc DS |
712 | ret += pim_upstream_evaluate_join_desired_interface (up, ch); |
713 | } /* scan iface channel list */ | |
12e41d03 | 714 | |
7a3ddda5 | 715 | return ret; /* false */ |
12e41d03 DL |
716 | } |
717 | ||
718 | /* | |
719 | See also pim_upstream_evaluate_join_desired() above. | |
720 | */ | |
721 | void pim_upstream_update_join_desired(struct pim_upstream *up) | |
722 | { | |
723 | int was_join_desired; /* boolean */ | |
724 | int is_join_desired; /* boolean */ | |
725 | ||
726 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
727 | ||
728 | is_join_desired = pim_upstream_evaluate_join_desired(up); | |
729 | if (is_join_desired) | |
730 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
731 | else | |
732 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
733 | ||
734 | /* switched from false to true */ | |
735 | if (is_join_desired && !was_join_desired) { | |
12e41d03 DL |
736 | pim_upstream_switch(up, PIM_UPSTREAM_JOINED); |
737 | return; | |
738 | } | |
739 | ||
740 | /* switched from true to false */ | |
741 | if (!is_join_desired && was_join_desired) { | |
12e41d03 DL |
742 | pim_upstream_switch(up, PIM_UPSTREAM_NOTJOINED); |
743 | return; | |
744 | } | |
745 | } | |
746 | ||
747 | /* | |
748 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
749 | Transitions from Joined State | |
750 | RPF'(S,G) GenID changes | |
751 | ||
752 | The upstream (S,G) state machine remains in Joined state. If the | |
753 | Join Timer is set to expire in more than t_override seconds, reset | |
754 | it so that it expires after t_override seconds. | |
755 | */ | |
756 | void pim_upstream_rpf_genid_changed(struct in_addr neigh_addr) | |
757 | { | |
758 | struct listnode *up_node; | |
759 | struct listnode *up_nextnode; | |
760 | struct pim_upstream *up; | |
761 | ||
762 | /* | |
0f588989 DS |
763 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr |
764 | */ | |
765 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) { | |
12e41d03 DL |
766 | |
767 | if (PIM_DEBUG_PIM_TRACE) { | |
eaa54bdb DW |
768 | char neigh_str[INET_ADDRSTRLEN]; |
769 | char rpf_addr_str[PREFIX_STRLEN]; | |
12e41d03 | 770 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, sizeof(neigh_str)); |
63c59d0c | 771 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, sizeof(rpf_addr_str)); |
05e451f8 | 772 | zlog_debug("%s: matching neigh=%s against upstream (S,G)=%s joined=%d rpf_addr=%s", |
12e41d03 | 773 | __PRETTY_FUNCTION__, |
05e451f8 | 774 | neigh_str, pim_str_sg_dump (&up->sg), |
12e41d03 DL |
775 | up->join_state == PIM_UPSTREAM_JOINED, |
776 | rpf_addr_str); | |
777 | } | |
778 | ||
779 | /* consider only (S,G) upstream in Joined state */ | |
780 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
781 | continue; | |
782 | ||
783 | /* match RPF'(S,G)=neigh_addr */ | |
63c59d0c | 784 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) |
12e41d03 DL |
785 | continue; |
786 | ||
787 | pim_upstream_join_timer_decrease_to_t_override("RPF'(S,G) GenID change", | |
788 | up, neigh_addr); | |
789 | } | |
790 | } | |
791 | ||
792 | ||
793 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
794 | struct interface *old_rpf_ifp) | |
795 | { | |
ea4a71fc DS |
796 | struct listnode *chnode; |
797 | struct listnode *chnextnode; | |
798 | struct pim_ifchannel *ch; | |
799 | struct pim_interface *pim_ifp; | |
800 | ||
801 | /* search all ifchannels */ | |
802 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
803 | ||
804 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
805 | if (!pim_ifp) |
806 | continue; | |
807 | ||
ea4a71fc DS |
808 | if (ch->upstream != up) |
809 | continue; | |
12e41d03 | 810 | |
ea4a71fc DS |
811 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { |
812 | if ( | |
813 | /* RPF_interface(S) was NOT I */ | |
814 | (old_rpf_ifp == ch->interface) | |
815 | && | |
816 | /* RPF_interface(S) stopped being I */ | |
817 | (ch->upstream->rpf.source_nexthop.interface != ch->interface) | |
818 | ) { | |
819 | assert_action_a5(ch); | |
820 | } | |
821 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
12e41d03 | 822 | |
ea4a71fc | 823 | pim_ifchannel_update_assert_tracking_desired(ch); |
12e41d03 DL |
824 | } |
825 | } | |
826 | ||
827 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
828 | { | |
12e41d03 DL |
829 | struct listnode *chnode; |
830 | struct listnode *chnextnode; | |
12e41d03 DL |
831 | struct pim_interface *pim_ifp; |
832 | struct pim_ifchannel *ch; | |
833 | ||
ea4a71fc DS |
834 | /* scan per-interface (S,G) state */ |
835 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
836 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
837 | if (!pim_ifp) |
838 | continue; | |
839 | ||
ea4a71fc DS |
840 | if (ch->upstream != up) |
841 | continue; | |
12e41d03 | 842 | |
ea4a71fc DS |
843 | pim_ifchannel_update_could_assert(ch); |
844 | } /* scan iface channel list */ | |
12e41d03 DL |
845 | } |
846 | ||
847 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
848 | { | |
12e41d03 DL |
849 | struct listnode *chnode; |
850 | struct listnode *chnextnode; | |
12e41d03 DL |
851 | struct pim_interface *pim_ifp; |
852 | struct pim_ifchannel *ch; | |
853 | ||
ea4a71fc DS |
854 | /* scan per-interface (S,G) state */ |
855 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
856 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
857 | if (!pim_ifp) |
858 | continue; | |
859 | ||
ea4a71fc DS |
860 | if (ch->upstream != up) |
861 | continue; | |
12e41d03 | 862 | |
ea4a71fc | 863 | pim_ifchannel_update_my_assert_metric(ch); |
12e41d03 | 864 | |
ea4a71fc | 865 | } /* scan iface channel list */ |
12e41d03 DL |
866 | } |
867 | ||
868 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
869 | { | |
12e41d03 DL |
870 | struct listnode *chnode; |
871 | struct listnode *chnextnode; | |
12e41d03 DL |
872 | struct pim_interface *pim_ifp; |
873 | struct pim_ifchannel *ch; | |
874 | ||
ea4a71fc DS |
875 | /* scan per-interface (S,G) state */ |
876 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
877 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
878 | if (!pim_ifp) |
879 | continue; | |
880 | ||
ea4a71fc DS |
881 | if (ch->upstream != up) |
882 | continue; | |
12e41d03 | 883 | |
ea4a71fc | 884 | pim_ifchannel_update_assert_tracking_desired(ch); |
12e41d03 | 885 | |
ea4a71fc | 886 | } /* scan iface channel list */ |
12e41d03 | 887 | } |
f14248dd DS |
888 | |
889 | /* | |
890 | * On an RP, the PMBR value must be cleared when the | |
891 | * Keepalive Timer expires | |
892 | */ | |
893 | static int | |
894 | pim_upstream_keep_alive_timer (struct thread *t) | |
895 | { | |
896 | struct pim_upstream *up; | |
897 | ||
898 | up = THREAD_ARG(t); | |
899 | ||
4ed0af70 | 900 | if (I_am_RP (up->sg.grp)) |
25a335e0 | 901 | { |
65e1fcd7 | 902 | pim_br_clear_pmbr (&up->sg); |
25a335e0 DS |
903 | /* |
904 | * We need to do more here :) | |
905 | * But this is the start. | |
906 | */ | |
907 | } | |
14315ea8 DS |
908 | |
909 | pim_mroute_update_counters (up->channel_oil); | |
910 | ||
bebc7290 DS |
911 | if (PIM_DEBUG_MROUTE) |
912 | { | |
913 | zlog_debug ("New: %llu %lu %lu %lu", up->channel_oil->cc.lastused, up->channel_oil->cc.pktcnt, | |
914 | up->channel_oil->cc.bytecnt, up->channel_oil->cc.wrong_if); | |
915 | zlog_debug ("old: %llu %lu %lu %lu", up->channel_oil->cc.lastused, up->channel_oil->cc.oldpktcnt, | |
916 | up->channel_oil->cc.oldbytecnt, up->channel_oil->cc.oldwrong_if); | |
917 | } | |
e3be0432 | 918 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) && |
5f0336ed | 919 | (up->channel_oil->cc.lastused/100 >= qpim_keep_alive_time)) |
14315ea8 DS |
920 | { |
921 | pim_mroute_del (up->channel_oil); | |
d854589a DS |
922 | THREAD_OFF (up->t_ka_timer); |
923 | THREAD_OFF (up->t_rs_timer); | |
924 | THREAD_OFF (up->t_join_timer); | |
63c59d0c | 925 | pim_joinprune_send (up->rpf.source_nexthop.interface, up->rpf.rpf_addr.u.prefix4, |
372eab92 | 926 | up, 0); |
a9b59879 | 927 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM (up->flags); |
5ce79466 | 928 | if (PIM_UPSTREAM_FLAG_TEST_CREATED_BY_UPSTREAM(up->flags)) |
e5905a3b | 929 | { |
3c72d654 | 930 | pim_upstream_unset_created_by_upstream(up); |
e5905a3b DS |
931 | pim_upstream_del (up, __PRETTY_FUNCTION__); |
932 | } | |
14315ea8 | 933 | } |
25a335e0 DS |
934 | else |
935 | { | |
14315ea8 | 936 | up->t_ka_timer = NULL; |
4304f95c | 937 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); |
25a335e0 | 938 | } |
14315ea8 | 939 | |
cb40b272 | 940 | return 1; |
f14248dd DS |
941 | } |
942 | ||
f14248dd DS |
943 | void |
944 | pim_upstream_keep_alive_timer_start (struct pim_upstream *up, | |
945 | uint32_t time) | |
946 | { | |
00d2f9e4 | 947 | THREAD_OFF (up->t_ka_timer); |
f14248dd DS |
948 | THREAD_TIMER_ON (master, |
949 | up->t_ka_timer, | |
950 | pim_upstream_keep_alive_timer, | |
951 | up, time); | |
952 | } | |
cb40b272 DS |
953 | |
954 | /* | |
955 | * 4.2.1 Last-Hop Switchover to the SPT | |
956 | * | |
957 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
958 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
959 | * router, it has the option of switching to receive the traffic on a | |
960 | * shortest path tree (SPT). | |
961 | * | |
962 | * The decision for a router to switch to the SPT is controlled as | |
963 | * follows: | |
964 | * | |
965 | * void | |
966 | * CheckSwitchToSpt(S,G) { | |
967 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
968 | * (+) pim_include(S,G) != NULL ) | |
969 | * AND SwitchToSptDesired(S,G) ) { | |
970 | * # Note: Restarting the KAT will result in the SPT switch | |
971 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
972 | * } | |
973 | * } | |
974 | * | |
975 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
976 | * defined. An "infinite threshold" policy can be implemented by making | |
977 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
978 | * first packet" policy can be implemented by making | |
979 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
980 | * received for the source and group. | |
981 | */ | |
982 | int | |
4ed0af70 | 983 | pim_upstream_switch_to_spt_desired (struct prefix_sg *sg) |
cb40b272 | 984 | { |
4ed0af70 | 985 | if (I_am_RP (sg->grp)) |
a3b58b4a DS |
986 | return 1; |
987 | ||
cb40b272 DS |
988 | return 0; |
989 | } | |
d7259eac | 990 | |
80d9c3a0 DS |
991 | int |
992 | pim_upstream_is_sg_rpt (struct pim_upstream *up) | |
993 | { | |
e43b8697 DS |
994 | if (up->sptbit == PIM_UPSTREAM_SPTBIT_TRUE) |
995 | return 1; | |
996 | ||
80d9c3a0 DS |
997 | return 0; |
998 | } | |
3a66b17b DS |
999 | /* |
1000 | * After receiving a packet set SPTbit: | |
1001 | * void | |
1002 | * Update_SPTbit(S,G,iif) { | |
1003 | * if ( iif == RPF_interface(S) | |
1004 | * AND JoinDesired(S,G) == TRUE | |
1005 | * AND ( DirectlyConnected(S) == TRUE | |
1006 | * OR RPF_interface(S) != RPF_interface(RP(G)) | |
1007 | * OR inherited_olist(S,G,rpt) == NULL | |
1008 | * OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1009 | * ( RPF'(S,G) != NULL ) ) | |
1010 | * OR ( I_Am_Assert_Loser(S,G,iif) ) { | |
1011 | * Set SPTbit(S,G) to TRUE | |
1012 | * } | |
1013 | * } | |
1014 | */ | |
1015 | void | |
1016 | pim_upstream_set_sptbit (struct pim_upstream *up, struct interface *incoming) | |
1017 | { | |
1018 | struct pim_rpf *grpf = NULL; | |
1019 | ||
1020 | // iif == RPF_interfvace(S) | |
1021 | if (up->rpf.source_nexthop.interface != incoming) | |
1022 | { | |
1023 | if (PIM_DEBUG_TRACE) | |
1024 | zlog_debug ("%s: Incoming Interface: %s is different than RPF_interface(S) %s", | |
1025 | __PRETTY_FUNCTION__, incoming->name, up->rpf.source_nexthop.interface->name); | |
1026 | return; | |
1027 | } | |
1028 | ||
1029 | // AND JoinDesired(S,G) == TRUE | |
1030 | // FIXME | |
1031 | ||
1032 | // DirectlyConnected(S) == TRUE | |
1033 | if (pim_if_connected_to_source (up->rpf.source_nexthop.interface, up->sg.src)) | |
1034 | { | |
1035 | if (PIM_DEBUG_TRACE) | |
1036 | zlog_debug ("%s: %s is directly connected to the source", __PRETTY_FUNCTION__, | |
1037 | pim_str_sg_dump (&up->sg)); | |
1038 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1039 | return; | |
1040 | } | |
1041 | ||
1042 | // OR RPF_interface(S) != RPF_interface(RP(G)) | |
1043 | grpf = RP(up->sg.grp); | |
1044 | if (!grpf || up->rpf.source_nexthop.interface != grpf->source_nexthop.interface) | |
1045 | { | |
1046 | if (PIM_DEBUG_TRACE) | |
1047 | zlog_debug ("%s: %s RPF_interface(S) != RPF_interface(RP(G))", | |
1048 | __PRETTY_FUNCTION__, pim_str_sg_dump(&up->sg)); | |
1049 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1050 | return; | |
1051 | } | |
1052 | ||
1053 | // OR inherited_olist(S,G,rpt) == NULL | |
1054 | if (pim_upstream_is_sg_rpt(up) && pim_upstream_empty_inherited_olist(up)) | |
1055 | { | |
1056 | if (PIM_DEBUG_TRACE) | |
1057 | zlog_debug ("%s: %s OR inherited_olist(S,G,rpt) == NULL", __PRETTY_FUNCTION__, | |
1058 | pim_str_sg_dump (&up->sg)); | |
1059 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1060 | return; | |
1061 | } | |
1062 | ||
1063 | // OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1064 | // ( RPF'(S,G) != NULL ) ) | |
1065 | if (up->parent && pim_rpf_is_same (&up->rpf, &up->parent->rpf)) | |
1066 | { | |
1067 | if (PIM_DEBUG_TRACE) | |
1068 | zlog_debug ("%s: %s RPF'(S,G) is the same as RPF'(*,G)", __PRETTY_FUNCTION__, | |
1069 | pim_str_sg_dump (&up->sg)); | |
1070 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; | |
1071 | return; | |
1072 | } | |
1073 | ||
1074 | return; | |
1075 | } | |
80d9c3a0 | 1076 | |
d7259eac | 1077 | const char * |
c9802954 | 1078 | pim_upstream_state2str (enum pim_upstream_state join_state) |
d7259eac | 1079 | { |
c9802954 | 1080 | switch (join_state) |
d7259eac DS |
1081 | { |
1082 | case PIM_UPSTREAM_NOTJOINED: | |
e775c0a4 | 1083 | return "NotJoined"; |
d7259eac DS |
1084 | break; |
1085 | case PIM_UPSTREAM_JOINED: | |
e775c0a4 | 1086 | return "Joined"; |
d7259eac DS |
1087 | break; |
1088 | case PIM_UPSTREAM_JOIN_PENDING: | |
e775c0a4 | 1089 | return "JoinPending"; |
d7259eac DS |
1090 | break; |
1091 | case PIM_UPSTREAM_PRUNE: | |
1092 | return "Prune"; | |
1093 | break; | |
1094 | } | |
e775c0a4 | 1095 | return "Unknown"; |
d7259eac | 1096 | } |
627ed2a3 DS |
1097 | |
1098 | static int | |
1099 | pim_upstream_register_stop_timer (struct thread *t) | |
1100 | { | |
4df01a4e | 1101 | struct pim_interface *pim_ifp; |
627ed2a3 DS |
1102 | struct pim_upstream *up; |
1103 | struct pim_rpf *rpg; | |
1104 | struct ip ip_hdr; | |
627ed2a3 DS |
1105 | up = THREAD_ARG (t); |
1106 | ||
79ce47c0 | 1107 | THREAD_TIMER_OFF (up->t_rs_timer); |
627ed2a3 DS |
1108 | up->t_rs_timer = NULL; |
1109 | ||
1110 | if (PIM_DEBUG_TRACE) | |
1111 | { | |
d5ed8a9c DS |
1112 | zlog_debug ("%s: (S,G)=%s upstream register stop timer %s", |
1113 | __PRETTY_FUNCTION__, pim_str_sg_dump (&up->sg), | |
c9802954 | 1114 | pim_upstream_state2str(up->join_state)); |
627ed2a3 DS |
1115 | } |
1116 | ||
1117 | switch (up->join_state) | |
1118 | { | |
1119 | case PIM_UPSTREAM_JOIN_PENDING: | |
1120 | up->join_state = PIM_UPSTREAM_JOINED; | |
bb027ee8 DS |
1121 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); |
1122 | break; | |
1123 | case PIM_UPSTREAM_JOINED: | |
627ed2a3 DS |
1124 | break; |
1125 | case PIM_UPSTREAM_PRUNE: | |
4df01a4e | 1126 | pim_ifp = up->rpf.source_nexthop.interface->info; |
7ef66046 DS |
1127 | if (!pim_ifp) |
1128 | { | |
1129 | if (PIM_DEBUG_TRACE) | |
1130 | zlog_debug ("%s: Interface: %s is not configured for pim", | |
1131 | __PRETTY_FUNCTION__, up->rpf.source_nexthop.interface->name); | |
1132 | return 0; | |
1133 | } | |
627ed2a3 DS |
1134 | up->join_state = PIM_UPSTREAM_JOIN_PENDING; |
1135 | pim_upstream_start_register_stop_timer (up, 1); | |
1136 | ||
4ed0af70 | 1137 | rpg = RP (up->sg.grp); |
627ed2a3 DS |
1138 | memset (&ip_hdr, 0, sizeof (struct ip)); |
1139 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
1140 | ip_hdr.ip_hl = 5; | |
1141 | ip_hdr.ip_v = 4; | |
4ed0af70 DS |
1142 | ip_hdr.ip_src = up->sg.src; |
1143 | ip_hdr.ip_dst = up->sg.grp; | |
dc686f82 | 1144 | ip_hdr.ip_len = htons (20); |
627ed2a3 | 1145 | // checksum is broken |
4df01a4e DS |
1146 | pim_register_send ((uint8_t *)&ip_hdr, sizeof (struct ip), |
1147 | pim_ifp->primary_address, rpg, 1); | |
627ed2a3 DS |
1148 | break; |
1149 | default: | |
1150 | break; | |
1151 | } | |
1152 | ||
1153 | return 0; | |
1154 | } | |
1155 | ||
1156 | void | |
1157 | pim_upstream_start_register_stop_timer (struct pim_upstream *up, int null_register) | |
1158 | { | |
1159 | uint32_t time; | |
1160 | ||
1161 | if (up->t_rs_timer) | |
1162 | { | |
1163 | THREAD_TIMER_OFF (up->t_rs_timer); | |
1164 | up->t_rs_timer = NULL; | |
1165 | } | |
1166 | ||
1167 | if (!null_register) | |
1168 | { | |
1169 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1170 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1171 | time = lower + (random () % (upper - lower + 1)) - PIM_REGISTER_PROBE_PERIOD; | |
1172 | } | |
1173 | else | |
1174 | time = PIM_REGISTER_PROBE_PERIOD; | |
1175 | ||
1176 | if (PIM_DEBUG_TRACE) | |
1177 | { | |
05e451f8 DS |
1178 | zlog_debug ("%s: (S,G)=%s Starting upstream register stop timer %d", |
1179 | __PRETTY_FUNCTION__, pim_str_sg_dump (&up->sg), time); | |
627ed2a3 DS |
1180 | } |
1181 | THREAD_TIMER_ON (master, up->t_rs_timer, | |
1182 | pim_upstream_register_stop_timer, | |
1183 | up, time); | |
1184 | } | |
4fdc8f36 DS |
1185 | |
1186 | /* | |
1187 | * For a given upstream, determine the inherited_olist | |
1188 | * and apply it. | |
219e0013 DS |
1189 | * |
1190 | * inherited_olist(S,G,rpt) = | |
1191 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1192 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1193 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1194 | * | |
1195 | * inherited_olist(S,G) = | |
1196 | * inherited_olist(S,G,rpt) (+) | |
1197 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1198 | * | |
4fdc8f36 DS |
1199 | * return 1 if there are any output interfaces |
1200 | * return 0 if there are not any output interfaces | |
1201 | */ | |
1202 | int | |
1203 | pim_upstream_inherited_olist (struct pim_upstream *up) | |
1204 | { | |
219e0013 | 1205 | struct pim_interface *pim_ifp; |
219e0013 DS |
1206 | struct listnode *chnextnode; |
1207 | struct pim_ifchannel *ch; | |
1208 | struct listnode *chnode; | |
219e0013 DS |
1209 | int output_intf = 0; |
1210 | ||
3667b0bc | 1211 | pim_ifp = up->rpf.source_nexthop.interface->info; |
da55afba | 1212 | if (pim_ifp && !up->channel_oil) |
3667b0bc | 1213 | up->channel_oil = pim_channel_oil_add (&up->sg, pim_ifp->mroute_vif_index); |
219e0013 | 1214 | |
ea4a71fc | 1215 | for (ALL_LIST_ELEMENTS (pim_ifchannel_list, chnode, chnextnode, ch)) |
219e0013 | 1216 | { |
ea4a71fc | 1217 | pim_ifp = ch->interface->info; |
7a3ddda5 DS |
1218 | if (!pim_ifp) |
1219 | continue; | |
219e0013 | 1220 | |
ea4a71fc | 1221 | if (pim_upstream_evaluate_join_desired_interface (up, ch)) |
7a3ddda5 | 1222 | { |
ea4a71fc DS |
1223 | pim_channel_add_oif (up->channel_oil, ch->interface, PIM_OIF_FLAG_PROTO_PIM); |
1224 | output_intf++; | |
219e0013 DS |
1225 | } |
1226 | } | |
1227 | ||
483eef9d DS |
1228 | /* |
1229 | * If we have output_intf switch state to Join and work like normal | |
1230 | * If we don't have an output_intf that means we are probably a | |
1231 | * switch on a stick so turn on forwarding to just accept the | |
1232 | * incoming packets so we don't bother the other stuff! | |
1233 | */ | |
1234 | if (output_intf) | |
1235 | pim_upstream_switch (up, PIM_UPSTREAM_JOINED); | |
1236 | else | |
1237 | forward_on (up); | |
219e0013 DS |
1238 | |
1239 | return output_intf; | |
4fdc8f36 | 1240 | } |
d3dd1804 | 1241 | |
80d9c3a0 DS |
1242 | int |
1243 | pim_upstream_empty_inherited_olist (struct pim_upstream *up) | |
1244 | { | |
ce0ddb4e | 1245 | return pim_channel_oil_empty (up->channel_oil); |
80d9c3a0 DS |
1246 | } |
1247 | ||
d3dd1804 DS |
1248 | /* |
1249 | * When we have a new neighbor, | |
1250 | * find upstreams that don't have their rpf_addr | |
1251 | * set and see if the new neighbor allows | |
1252 | * the join to be sent | |
1253 | */ | |
1254 | void | |
1255 | pim_upstream_find_new_rpf (void) | |
1256 | { | |
1257 | struct listnode *up_node; | |
1258 | struct listnode *up_nextnode; | |
1259 | struct pim_upstream *up; | |
1260 | ||
1261 | /* | |
0f588989 DS |
1262 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr |
1263 | */ | |
1264 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) | |
d3dd1804 | 1265 | { |
63c59d0c | 1266 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) |
d3dd1804 DS |
1267 | { |
1268 | if (PIM_DEBUG_PIM_TRACE) | |
1269 | zlog_debug ("Upstream %s without a path to send join, checking", | |
1270 | pim_str_sg_dump (&up->sg)); | |
1271 | pim_rpf_update (up, NULL); | |
1272 | } | |
1273 | } | |
1274 | } | |
0f588989 | 1275 | |
0f588989 DS |
1276 | static unsigned int |
1277 | pim_upstream_hash_key (void *arg) | |
1278 | { | |
1279 | struct pim_upstream *up = (struct pim_upstream *)arg; | |
1280 | ||
1281 | return jhash_2words (up->sg.src.s_addr, up->sg.grp.s_addr, 0); | |
1282 | } | |
1283 | ||
1284 | void pim_upstream_terminate (void) | |
1285 | { | |
1286 | if (pim_upstream_list) | |
1287 | list_free (pim_upstream_list); | |
1288 | pim_upstream_list = NULL; | |
1289 | ||
1290 | if (pim_upstream_hash) | |
1291 | hash_free (pim_upstream_hash); | |
1292 | } | |
1293 | ||
1294 | static int | |
1295 | pim_upstream_equal (const void *arg1, const void *arg2) | |
1296 | { | |
1297 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; | |
1298 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
1299 | ||
1300 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) && | |
1301 | (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
1302 | return 1; | |
1303 | ||
1304 | return 0; | |
1305 | } | |
1306 | ||
9c5e4d62 DS |
1307 | /* |
1308 | * Code to check and see if we've received packets on a S,G mroute | |
1309 | * and if so to set the SPT bit appropriately | |
1310 | */ | |
1311 | static void | |
1312 | pim_upstream_sg_running (void *arg) | |
1313 | { | |
1314 | struct pim_upstream *up = (struct pim_upstream *)arg; | |
e43b8697 DS |
1315 | long long now; |
1316 | ||
1317 | // If we are TRUE already no need to do more work | |
1318 | if (up->sptbit == PIM_UPSTREAM_SPTBIT_TRUE) | |
1319 | { | |
1320 | if (PIM_DEBUG_TRACE) | |
1321 | zlog_debug ("%s: %s sptbit is true", __PRETTY_FUNCTION__, | |
1322 | pim_str_sg_dump(&up->sg)); | |
1323 | return; | |
1324 | } | |
1325 | ||
1326 | // No packet can have arrived here if this is the case | |
1327 | if (!up->channel_oil || !up->channel_oil->installed) | |
1328 | { | |
1329 | if (PIM_DEBUG_TRACE) | |
1330 | zlog_debug ("%s: %s is not installed in mroute", | |
1331 | __PRETTY_FUNCTION__, pim_str_sg_dump (&up->sg)); | |
1332 | return; | |
1333 | } | |
1334 | ||
1335 | // We need at least 30 seconds to see if we are getting packets | |
1336 | now = pim_time_monotonic_sec(); | |
1337 | if (now - up->state_transition <= 30) | |
1338 | { | |
1339 | if (PIM_DEBUG_TRACE) | |
1340 | zlog_debug ("%s: %s uptime is %lld", | |
1341 | __PRETTY_FUNCTION__, pim_str_sg_dump (&up->sg), | |
1342 | now - up->state_transition); | |
1343 | return; | |
1344 | } | |
1345 | ||
1346 | pim_mroute_update_counters (up->channel_oil); | |
1347 | ||
1348 | // Have we seen packets? | |
1349 | if ((up->channel_oil->cc.oldpktcnt <= up->channel_oil->cc.pktcnt) && | |
1350 | (up->channel_oil->cc.lastused/100 > 30)) | |
1351 | { | |
1352 | if (PIM_DEBUG_TRACE) | |
1353 | { | |
1354 | zlog_debug ("%s: %s old packet count is equal or lastused is greater than 30", | |
1355 | __PRETTY_FUNCTION__, pim_str_sg_dump (&up->sg)); | |
1356 | zlog_debug ("%s: %ld %ld %lld", __PRETTY_FUNCTION__, up->channel_oil->cc.oldpktcnt, up->channel_oil->cc.pktcnt, up->channel_oil->cc.lastused/100); | |
1357 | } | |
1358 | return; | |
1359 | } | |
1360 | ||
3a66b17b | 1361 | pim_upstream_set_sptbit (up, up->rpf.source_nexthop.interface); |
e43b8697 | 1362 | return; |
9c5e4d62 DS |
1363 | } |
1364 | ||
040d86ad DS |
1365 | void |
1366 | pim_upstream_init (void) | |
0f588989 | 1367 | { |
9c5e4d62 DS |
1368 | pim_upstream_sg_wheel = wheel_init (master, 31000, 100, |
1369 | pim_upstream_hash_key, | |
1370 | pim_upstream_sg_running); | |
0f588989 DS |
1371 | pim_upstream_hash = hash_create_size (8192, pim_upstream_hash_key, |
1372 | pim_upstream_equal); | |
1373 | ||
1374 | pim_upstream_list = list_new (); | |
1375 | pim_upstream_list->del = (void (*)(void *)) pim_upstream_free; | |
03417ccd | 1376 | pim_upstream_list->cmp = pim_upstream_compare; |
0f588989 DS |
1377 | |
1378 | } |