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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" |
12e41d03 | 54 | |
0f588989 DS |
55 | struct hash *pim_upstream_hash = NULL; |
56 | struct list *pim_upstream_list = NULL; | |
9c5e4d62 | 57 | struct timer_wheel *pim_upstream_sg_wheel = NULL; |
0f588989 | 58 | |
12e41d03 DL |
59 | static void join_timer_start(struct pim_upstream *up); |
60 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); | |
61 | ||
cfa91a87 DS |
62 | /* |
63 | * A (*,G) or a (*,*) is going away | |
64 | * remove the parent pointer from | |
65 | * those pointing at us | |
66 | */ | |
67 | static void | |
68 | pim_upstream_remove_children (struct pim_upstream *up) | |
69 | { | |
cfa91a87 DS |
70 | struct pim_upstream *child; |
71 | ||
03417ccd | 72 | if (!up->sources) |
cfa91a87 DS |
73 | return; |
74 | ||
03417ccd | 75 | while (!list_isempty (up->sources)) |
cfa91a87 | 76 | { |
03417ccd DS |
77 | child = listnode_head (up->sources); |
78 | child->parent = NULL; | |
79 | listnode_delete (up->sources, child); | |
cfa91a87 DS |
80 | } |
81 | } | |
82 | ||
83 | /* | |
84 | * A (*,G) or a (*,*) is being created | |
85 | * Find the children that would point | |
86 | * at us. | |
87 | */ | |
88 | static void | |
89 | pim_upstream_find_new_children (struct pim_upstream *up) | |
90 | { | |
91 | struct pim_upstream *child; | |
92 | struct listnode *ch_node; | |
93 | ||
4ed0af70 DS |
94 | if ((up->sg.src.s_addr != INADDR_ANY) && |
95 | (up->sg.grp.s_addr != INADDR_ANY)) | |
cfa91a87 DS |
96 | return; |
97 | ||
4ed0af70 DS |
98 | if ((up->sg.src.s_addr == INADDR_ANY) && |
99 | (up->sg.grp.s_addr == INADDR_ANY)) | |
cfa91a87 DS |
100 | return; |
101 | ||
0f588989 | 102 | for (ALL_LIST_ELEMENTS_RO (pim_upstream_list, ch_node, child)) |
cfa91a87 | 103 | { |
4ed0af70 | 104 | if ((up->sg.grp.s_addr != INADDR_ANY) && |
0f588989 | 105 | (child->sg.grp.s_addr == up->sg.grp.s_addr) && |
cfa91a87 | 106 | (child != up)) |
03417ccd DS |
107 | { |
108 | child->parent = up; | |
109 | listnode_add_sort (up->sources, child); | |
110 | } | |
cfa91a87 DS |
111 | } |
112 | } | |
113 | ||
4d99418b DS |
114 | /* |
115 | * If we have a (*,*) || (S,*) there is no parent | |
116 | * If we have a (S,G), find the (*,G) | |
117 | * If we have a (*,G), find the (*,*) | |
118 | */ | |
119 | static struct pim_upstream * | |
03417ccd | 120 | pim_upstream_find_parent (struct pim_upstream *child) |
4d99418b | 121 | { |
03417ccd DS |
122 | struct prefix_sg any = child->sg; |
123 | struct pim_upstream *up = NULL; | |
4d99418b DS |
124 | |
125 | // (S,G) | |
03417ccd DS |
126 | if ((child->sg.src.s_addr != INADDR_ANY) && |
127 | (child->sg.grp.s_addr != INADDR_ANY)) | |
4d99418b | 128 | { |
4ed0af70 | 129 | any.src.s_addr = INADDR_ANY; |
03417ccd DS |
130 | up = pim_upstream_find (&any); |
131 | ||
132 | if (up) | |
133 | listnode_add (up->sources, child); | |
134 | ||
135 | return up; | |
4d99418b DS |
136 | } |
137 | ||
03417ccd | 138 | return NULL; |
4d99418b DS |
139 | } |
140 | ||
12e41d03 DL |
141 | void pim_upstream_free(struct pim_upstream *up) |
142 | { | |
143 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
144 | } | |
145 | ||
146 | static void upstream_channel_oil_detach(struct pim_upstream *up) | |
147 | { | |
148 | if (up->channel_oil) { | |
149 | pim_channel_oil_del(up->channel_oil); | |
25a335e0 | 150 | up->channel_oil = NULL; |
12e41d03 DL |
151 | } |
152 | } | |
153 | ||
e5905a3b DS |
154 | void |
155 | pim_upstream_del(struct pim_upstream *up, const char *name) | |
12e41d03 | 156 | { |
e5905a3b DS |
157 | if (PIM_DEBUG_PIM_TRACE) |
158 | { | |
159 | zlog_debug ("%s: Delete (%s) ref count: %d", | |
160 | name, pim_str_sg_dump (&up->sg), up->ref_count); | |
161 | } | |
162 | --up->ref_count; | |
163 | ||
164 | if (up->ref_count >= 1) | |
165 | return; | |
166 | ||
594a78cc DS |
167 | if (PIM_DEBUG_PIM_TRACE) |
168 | zlog_debug ("%s: %s is being deleted", | |
169 | __PRETTY_FUNCTION__, | |
170 | pim_str_sg_dump (&up->sg)); | |
12e41d03 | 171 | THREAD_OFF(up->t_join_timer); |
f14248dd | 172 | THREAD_OFF(up->t_ka_timer); |
792f4d29 | 173 | THREAD_OFF(up->t_rs_timer); |
12e41d03 | 174 | |
9c5e4d62 DS |
175 | if (up->sg.src.s_addr != INADDR_ANY) |
176 | wheel_remove_item (pim_upstream_sg_wheel, up); | |
177 | ||
cfa91a87 | 178 | pim_upstream_remove_children (up); |
7fe1f662 | 179 | pim_mroute_del (up->channel_oil); |
12e41d03 DL |
180 | upstream_channel_oil_detach(up); |
181 | ||
03417ccd DS |
182 | if (up->sources) |
183 | list_delete (up->sources); | |
184 | up->sources = NULL; | |
185 | ||
12e41d03 DL |
186 | /* |
187 | notice that listnode_delete() can't be moved | |
188 | into pim_upstream_free() because the later is | |
189 | called by list_delete_all_node() | |
190 | */ | |
03417ccd DS |
191 | if (up->parent) |
192 | { | |
193 | listnode_delete (up->parent->sources, up); | |
194 | up->parent = NULL; | |
195 | } | |
0f588989 DS |
196 | listnode_delete (pim_upstream_list, up); |
197 | hash_release (pim_upstream_hash, up); | |
12e41d03 DL |
198 | |
199 | pim_upstream_free(up); | |
200 | } | |
201 | ||
56638739 DS |
202 | void |
203 | pim_upstream_send_join (struct pim_upstream *up) | |
12e41d03 | 204 | { |
12e41d03 | 205 | if (PIM_DEBUG_PIM_TRACE) { |
eaa54bdb | 206 | char rpf_str[PREFIX_STRLEN]; |
63c59d0c | 207 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 208 | zlog_debug ("%s: RPF'%s=%s(%s) for Interface %s", __PRETTY_FUNCTION__, |
c9802954 | 209 | pim_str_sg_dump (&up->sg), rpf_str, pim_upstream_state2str (up->join_state), |
56638739 | 210 | up->rpf.source_nexthop.interface->name); |
63c59d0c | 211 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { |
05e451f8 | 212 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", |
56638739 | 213 | __PRETTY_FUNCTION__, |
05e451f8 | 214 | pim_str_sg_dump (&up->sg), rpf_str); |
12e41d03 DL |
215 | /* warning only */ |
216 | } | |
217 | } | |
56638739 | 218 | |
12e41d03 DL |
219 | /* send Join(S,G) to the current upstream neighbor */ |
220 | pim_joinprune_send(up->rpf.source_nexthop.interface, | |
63c59d0c | 221 | up->rpf.rpf_addr.u.prefix4, |
372eab92 | 222 | up, |
12e41d03 DL |
223 | 1 /* join */); |
224 | } | |
225 | ||
226 | static int on_join_timer(struct thread *t) | |
227 | { | |
228 | struct pim_upstream *up; | |
229 | ||
230 | zassert(t); | |
231 | up = THREAD_ARG(t); | |
232 | zassert(up); | |
233 | ||
bb6e291f DS |
234 | up->t_join_timer = NULL; |
235 | ||
236 | /* | |
237 | * In the case of a HFR we will not ahve anyone to send this to. | |
238 | */ | |
0bf27c5c | 239 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
bb6e291f DS |
240 | return 0; |
241 | ||
eb345962 DS |
242 | /* |
243 | * Don't send the join if the outgoing interface is a loopback | |
244 | * But since this might change leave the join timer running | |
245 | */ | |
246 | if (!if_is_loopback (up->rpf.source_nexthop.interface)) | |
247 | pim_upstream_send_join (up); | |
12e41d03 | 248 | |
12e41d03 DL |
249 | join_timer_start(up); |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
254 | static void join_timer_start(struct pim_upstream *up) | |
255 | { | |
256 | if (PIM_DEBUG_PIM_EVENTS) { | |
05e451f8 | 257 | zlog_debug("%s: starting %d sec timer for upstream (S,G)=%s", |
12e41d03 DL |
258 | __PRETTY_FUNCTION__, |
259 | qpim_t_periodic, | |
05e451f8 | 260 | pim_str_sg_dump (&up->sg)); |
12e41d03 DL |
261 | } |
262 | ||
8e38a2cf | 263 | THREAD_OFF (up->t_join_timer); |
12e41d03 DL |
264 | THREAD_TIMER_ON(master, up->t_join_timer, |
265 | on_join_timer, | |
266 | up, qpim_t_periodic); | |
267 | } | |
268 | ||
269 | void pim_upstream_join_timer_restart(struct pim_upstream *up) | |
270 | { | |
271 | THREAD_OFF(up->t_join_timer); | |
272 | join_timer_start(up); | |
273 | } | |
274 | ||
275 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
276 | int interval_msec) | |
277 | { | |
278 | if (PIM_DEBUG_PIM_EVENTS) { | |
05e451f8 | 279 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", |
12e41d03 DL |
280 | __PRETTY_FUNCTION__, |
281 | interval_msec, | |
05e451f8 | 282 | pim_str_sg_dump (&up->sg)); |
12e41d03 DL |
283 | } |
284 | ||
285 | THREAD_OFF(up->t_join_timer); | |
286 | THREAD_TIMER_MSEC_ON(master, up->t_join_timer, | |
287 | on_join_timer, | |
288 | up, interval_msec); | |
289 | } | |
290 | ||
291 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
292 | struct in_addr rpf_addr, | |
293 | int holdtime) | |
294 | { | |
295 | long t_joinsuppress_msec; | |
296 | long join_timer_remain_msec; | |
297 | ||
298 | t_joinsuppress_msec = MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
299 | 1000 * holdtime); | |
300 | ||
301 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
302 | ||
303 | if (PIM_DEBUG_PIM_TRACE) { | |
eaa54bdb | 304 | char rpf_str[INET_ADDRSTRLEN]; |
12e41d03 | 305 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 306 | zlog_debug("%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", |
12e41d03 | 307 | __FILE__, __PRETTY_FUNCTION__, |
05e451f8 | 308 | pim_str_sg_dump (&up->sg), |
12e41d03 DL |
309 | rpf_str, |
310 | join_timer_remain_msec, t_joinsuppress_msec); | |
311 | } | |
312 | ||
313 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
314 | if (PIM_DEBUG_PIM_TRACE) { | |
05e451f8 | 315 | zlog_debug("%s %s: suppressing Join(S,G)=%s for %ld msec", |
12e41d03 | 316 | __FILE__, __PRETTY_FUNCTION__, |
05e451f8 | 317 | pim_str_sg_dump (&up->sg), t_joinsuppress_msec); |
12e41d03 DL |
318 | } |
319 | ||
320 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
321 | } | |
322 | } | |
323 | ||
324 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
325 | struct pim_upstream *up, | |
326 | struct in_addr rpf_addr) | |
327 | { | |
328 | long join_timer_remain_msec; | |
329 | int t_override_msec; | |
330 | ||
331 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
332 | t_override_msec = pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
333 | ||
334 | if (PIM_DEBUG_PIM_TRACE) { | |
eaa54bdb | 335 | char rpf_str[INET_ADDRSTRLEN]; |
12e41d03 | 336 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 337 | zlog_debug("%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", |
12e41d03 | 338 | debug_label, |
05e451f8 | 339 | pim_str_sg_dump (&up->sg), rpf_str, |
12e41d03 DL |
340 | join_timer_remain_msec, t_override_msec); |
341 | } | |
342 | ||
343 | if (join_timer_remain_msec > t_override_msec) { | |
344 | if (PIM_DEBUG_PIM_TRACE) { | |
05e451f8 | 345 | zlog_debug("%s: decreasing (S,G)=%s join timer to t_override=%d msec", |
12e41d03 | 346 | debug_label, |
05e451f8 | 347 | pim_str_sg_dump (&up->sg), |
12e41d03 DL |
348 | t_override_msec); |
349 | } | |
350 | ||
351 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
352 | } | |
353 | } | |
354 | ||
355 | static void forward_on(struct pim_upstream *up) | |
356 | { | |
357 | struct listnode *ifnode; | |
358 | struct listnode *ifnextnode; | |
359 | struct listnode *chnode; | |
360 | struct listnode *chnextnode; | |
361 | struct interface *ifp; | |
362 | struct pim_interface *pim_ifp; | |
363 | struct pim_ifchannel *ch; | |
364 | ||
365 | /* scan all interfaces */ | |
469351b3 | 366 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
367 | pim_ifp = ifp->info; |
368 | if (!pim_ifp) | |
369 | continue; | |
370 | ||
371 | /* scan per-interface (S,G) state */ | |
372 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
373 | ||
374 | if (ch->upstream != up) | |
375 | continue; | |
376 | ||
377 | if (pim_macro_chisin_oiflist(ch)) | |
378 | pim_forward_start(ch); | |
379 | ||
380 | } /* scan iface channel list */ | |
381 | } /* scan iflist */ | |
382 | } | |
383 | ||
384 | static void forward_off(struct pim_upstream *up) | |
385 | { | |
386 | struct listnode *ifnode; | |
387 | struct listnode *ifnextnode; | |
388 | struct listnode *chnode; | |
389 | struct listnode *chnextnode; | |
390 | struct interface *ifp; | |
391 | struct pim_interface *pim_ifp; | |
392 | struct pim_ifchannel *ch; | |
393 | ||
394 | /* scan all interfaces */ | |
469351b3 | 395 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
396 | pim_ifp = ifp->info; |
397 | if (!pim_ifp) | |
398 | continue; | |
399 | ||
400 | /* scan per-interface (S,G) state */ | |
401 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
402 | ||
403 | if (ch->upstream != up) | |
404 | continue; | |
405 | ||
406 | pim_forward_stop(ch); | |
407 | ||
408 | } /* scan iface channel list */ | |
409 | } /* scan iflist */ | |
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; | |
455 | up->state_transition = pim_time_monotonic_sec(); | |
456 | ||
457 | break; | |
458 | } | |
459 | ||
12e41d03 DL |
460 | pim_upstream_update_assert_tracking_desired(up); |
461 | ||
462 | if (new_state == PIM_UPSTREAM_JOINED) { | |
81900c5a DS |
463 | if (old_state != PIM_UPSTREAM_JOINED) |
464 | { | |
0bf27c5c | 465 | int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags); |
81900c5a | 466 | forward_on(up); |
0bf27c5c | 467 | if (pim_upstream_could_register (up)) |
bb6e291f | 468 | { |
0bf27c5c | 469 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); |
a9b59879 | 470 | if (!old_fhr && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) |
bb6e291f DS |
471 | { |
472 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); | |
473 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
474 | } | |
475 | } | |
476 | else | |
477 | { | |
478 | pim_upstream_send_join (up); | |
479 | join_timer_start (up); | |
480 | } | |
81900c5a DS |
481 | } |
482 | else | |
483 | { | |
484 | forward_on (up); | |
485 | } | |
12e41d03 DL |
486 | } |
487 | else { | |
488 | forward_off(up); | |
489 | pim_joinprune_send(up->rpf.source_nexthop.interface, | |
63c59d0c | 490 | up->rpf.rpf_addr.u.prefix4, |
372eab92 | 491 | up, |
12e41d03 | 492 | 0 /* prune */); |
7fcdfb34 DS |
493 | if (up->t_join_timer) |
494 | THREAD_OFF(up->t_join_timer); | |
12e41d03 | 495 | } |
12e41d03 DL |
496 | } |
497 | ||
03417ccd DS |
498 | static int |
499 | pim_upstream_compare (void *arg1, void *arg2) | |
500 | { | |
501 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; | |
502 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
503 | ||
504 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) | |
505 | return -1; | |
506 | ||
507 | if (ntohl(up1->sg.grp.s_addr) > ntohl(up2->sg.grp.s_addr)) | |
508 | return 1; | |
509 | ||
510 | if (ntohl(up1->sg.src.s_addr) < ntohl(up2->sg.src.s_addr)) | |
511 | return -1; | |
512 | ||
513 | if (ntohl(up1->sg.src.s_addr) > ntohl(up2->sg.src.s_addr)) | |
514 | return 1; | |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
4ed0af70 | 519 | static struct pim_upstream *pim_upstream_new(struct prefix_sg *sg, |
4a40c37a DS |
520 | struct interface *incoming, |
521 | int flags) | |
12e41d03 DL |
522 | { |
523 | struct pim_upstream *up; | |
2f702571 | 524 | enum pim_rpf_result rpf_result; |
12e41d03 | 525 | |
36d9e7dc | 526 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); |
12e41d03 | 527 | if (!up) { |
36d9e7dc | 528 | zlog_err("%s: PIM XCALLOC(%zu) failure", |
12e41d03 | 529 | __PRETTY_FUNCTION__, sizeof(*up)); |
8f5f5e91 | 530 | return NULL; |
12e41d03 DL |
531 | } |
532 | ||
5074a423 | 533 | up->sg = *sg; |
0f588989 | 534 | up = hash_get (pim_upstream_hash, up, hash_alloc_intern); |
36d6bd7d | 535 | if (!pim_rp_set_upstream_addr (&up->upstream_addr, sg->src, sg->grp)) |
8f5f5e91 DS |
536 | { |
537 | if (PIM_DEBUG_PIM_TRACE) | |
538 | zlog_debug("%s: Received a (*,G) with no RP configured", __PRETTY_FUNCTION__); | |
539 | ||
03417ccd | 540 | hash_release (pim_upstream_hash, up); |
8f5f5e91 DS |
541 | XFREE (MTYPE_PIM_UPSTREAM, up); |
542 | return NULL; | |
543 | } | |
544 | ||
03417ccd DS |
545 | up->parent = pim_upstream_find_parent (up); |
546 | if (up->sg.src.s_addr == INADDR_ANY) | |
547 | { | |
548 | up->sources = list_new (); | |
549 | up->sources->cmp = pim_upstream_compare; | |
550 | } | |
551 | else | |
552 | up->sources = NULL; | |
553 | ||
cfa91a87 | 554 | pim_upstream_find_new_children (up); |
4a40c37a | 555 | up->flags = flags; |
12e41d03 | 556 | up->ref_count = 1; |
4a4c4a07 DS |
557 | up->t_join_timer = NULL; |
558 | up->t_ka_timer = NULL; | |
792f4d29 | 559 | up->t_rs_timer = NULL; |
12e41d03 DL |
560 | up->join_state = 0; |
561 | up->state_transition = pim_time_monotonic_sec(); | |
4a4c4a07 | 562 | up->channel_oil = NULL; |
f9e0ab5b | 563 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; |
12e41d03 | 564 | |
f24405b1 | 565 | up->rpf.source_nexthop.interface = NULL; |
63c59d0c DS |
566 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; |
567 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
12e41d03 DL |
568 | up->rpf.source_nexthop.mrib_metric_preference = qpim_infinite_assert_metric.metric_preference; |
569 | up->rpf.source_nexthop.mrib_route_metric = qpim_infinite_assert_metric.route_metric; | |
63c59d0c DS |
570 | up->rpf.rpf_addr.family = AF_INET; |
571 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
12e41d03 | 572 | |
9c5e4d62 DS |
573 | if (up->sg.src.s_addr != INADDR_ANY) |
574 | wheel_add_item (pim_upstream_sg_wheel, up); | |
575 | ||
d3dd1804 | 576 | rpf_result = pim_rpf_update(up, NULL); |
2f702571 | 577 | if (rpf_result == PIM_RPF_FAILURE) { |
4a40c37a DS |
578 | if (PIM_DEBUG_PIM_TRACE) |
579 | zlog_debug ("%s: Attempting to create upstream(%s), Unable to RPF for source", __PRETTY_FUNCTION__, | |
580 | pim_str_sg_dump (&up->sg)); | |
03417ccd DS |
581 | |
582 | if (up->parent) | |
583 | { | |
584 | listnode_delete (up->parent->sources, up); | |
585 | up->parent = NULL; | |
586 | } | |
9c5e4d62 DS |
587 | |
588 | if (up->sg.src.s_addr != INADDR_ANY) | |
589 | wheel_remove_item (pim_upstream_sg_wheel, up); | |
590 | ||
03417ccd DS |
591 | pim_upstream_remove_children (up); |
592 | if (up->sources) | |
593 | list_delete (up->sources); | |
594 | ||
595 | hash_release (pim_upstream_hash, up); | |
2f702571 DS |
596 | XFREE(MTYPE_PIM_UPSTREAM, up); |
597 | return NULL; | |
598 | } | |
12e41d03 | 599 | |
0f588989 | 600 | listnode_add_sort(pim_upstream_list, up); |
12e41d03 | 601 | |
03417ccd DS |
602 | if (PIM_DEBUG_PIM_TRACE) |
603 | zlog_debug ("%s: Created Upstream %s", __PRETTY_FUNCTION__, pim_str_sg_dump (&up->sg)); | |
604 | ||
12e41d03 DL |
605 | return up; |
606 | } | |
607 | ||
4ed0af70 | 608 | struct pim_upstream *pim_upstream_find(struct prefix_sg *sg) |
12e41d03 | 609 | { |
0f588989 DS |
610 | struct pim_upstream lookup; |
611 | struct pim_upstream *up = NULL; | |
12e41d03 | 612 | |
0f588989 DS |
613 | lookup.sg = *sg; |
614 | up = hash_lookup (pim_upstream_hash, &lookup); | |
615 | return up; | |
12e41d03 DL |
616 | } |
617 | ||
4ed0af70 | 618 | struct pim_upstream *pim_upstream_add(struct prefix_sg *sg, |
4a40c37a | 619 | struct interface *incoming, |
e5905a3b | 620 | int flags, const char *name) |
12e41d03 | 621 | { |
594a78cc | 622 | struct pim_upstream *up = NULL; |
e5905a3b | 623 | int found = 0; |
5074a423 | 624 | up = pim_upstream_find(sg); |
12e41d03 DL |
625 | if (up) { |
626 | ++up->ref_count; | |
16b72591 | 627 | up->flags |= flags; |
e5905a3b | 628 | found = 1; |
12e41d03 DL |
629 | } |
630 | else { | |
4a40c37a | 631 | up = pim_upstream_new(sg, incoming, flags); |
12e41d03 DL |
632 | } |
633 | ||
e5905a3b | 634 | if (PIM_DEBUG_TRACE) |
f4075cb4 DS |
635 | { |
636 | if (up) | |
637 | zlog_debug("%s(%s): (%s), found: %d: ref_count: %d", | |
638 | __PRETTY_FUNCTION__, name, | |
639 | pim_str_sg_dump (&up->sg), found, | |
640 | up->ref_count); | |
641 | else | |
642 | zlog_debug("%s(%s): (%s) failure to create", | |
643 | __PRETTY_FUNCTION__, name, | |
644 | pim_str_sg_dump (sg)); | |
645 | } | |
12e41d03 | 646 | |
e5905a3b | 647 | return up; |
12e41d03 DL |
648 | } |
649 | ||
7a3ddda5 DS |
650 | static int |
651 | pim_upstream_evaluate_join_desired_interface (struct pim_upstream *up, | |
652 | struct pim_ifchannel *ch) | |
653 | { | |
654 | struct pim_upstream *parent = up->parent; | |
655 | ||
656 | if (ch->upstream == up) | |
657 | { | |
658 | if (!pim_macro_ch_lost_assert(ch) && pim_macro_chisin_joins_or_include(ch)) | |
659 | return 1; | |
660 | } | |
661 | /* | |
662 | * joins (*,G) | |
663 | */ | |
664 | if (parent && ch->upstream == parent) | |
665 | { | |
666 | if (!pim_macro_ch_lost_assert (ch) && pim_macro_chisin_joins_or_include (ch)) | |
667 | return 1; | |
668 | } | |
669 | ||
670 | return 0; | |
671 | } | |
672 | ||
12e41d03 DL |
673 | /* |
674 | Evaluate JoinDesired(S,G): | |
675 | ||
676 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
677 | in the set: | |
678 | ||
679 | inherited_olist(S,G) = | |
680 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
681 | ||
682 | JoinDesired(S,G) may be affected by changes in the following: | |
683 | ||
684 | pim_ifp->primary_address | |
685 | pim_ifp->pim_dr_addr | |
686 | ch->ifassert_winner_metric | |
687 | ch->ifassert_winner | |
688 | ch->local_ifmembership | |
689 | ch->ifjoin_state | |
690 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
691 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
692 | ch->upstream->rpf.source_nexthop.interface | |
693 | ||
694 | See also pim_upstream_update_join_desired() below. | |
695 | */ | |
696 | int pim_upstream_evaluate_join_desired(struct pim_upstream *up) | |
697 | { | |
698 | struct listnode *ifnode; | |
699 | struct listnode *ifnextnode; | |
700 | struct listnode *chnode; | |
701 | struct listnode *chnextnode; | |
702 | struct interface *ifp; | |
703 | struct pim_interface *pim_ifp; | |
704 | struct pim_ifchannel *ch; | |
7a3ddda5 | 705 | int ret = 0; |
12e41d03 DL |
706 | |
707 | /* scan all interfaces */ | |
469351b3 | 708 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
709 | pim_ifp = ifp->info; |
710 | if (!pim_ifp) | |
711 | continue; | |
712 | ||
713 | /* scan per-interface (S,G) state */ | |
7a3ddda5 DS |
714 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) |
715 | { | |
716 | ret += pim_upstream_evaluate_join_desired_interface (up, ch); | |
717 | } /* scan iface channel list */ | |
12e41d03 DL |
718 | } /* scan iflist */ |
719 | ||
7a3ddda5 | 720 | return ret; /* false */ |
12e41d03 DL |
721 | } |
722 | ||
723 | /* | |
724 | See also pim_upstream_evaluate_join_desired() above. | |
725 | */ | |
726 | void pim_upstream_update_join_desired(struct pim_upstream *up) | |
727 | { | |
728 | int was_join_desired; /* boolean */ | |
729 | int is_join_desired; /* boolean */ | |
730 | ||
731 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
732 | ||
733 | is_join_desired = pim_upstream_evaluate_join_desired(up); | |
734 | if (is_join_desired) | |
735 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
736 | else | |
737 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
738 | ||
739 | /* switched from false to true */ | |
740 | if (is_join_desired && !was_join_desired) { | |
12e41d03 DL |
741 | pim_upstream_switch(up, PIM_UPSTREAM_JOINED); |
742 | return; | |
743 | } | |
744 | ||
745 | /* switched from true to false */ | |
746 | if (!is_join_desired && was_join_desired) { | |
12e41d03 DL |
747 | pim_upstream_switch(up, PIM_UPSTREAM_NOTJOINED); |
748 | return; | |
749 | } | |
750 | } | |
751 | ||
752 | /* | |
753 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
754 | Transitions from Joined State | |
755 | RPF'(S,G) GenID changes | |
756 | ||
757 | The upstream (S,G) state machine remains in Joined state. If the | |
758 | Join Timer is set to expire in more than t_override seconds, reset | |
759 | it so that it expires after t_override seconds. | |
760 | */ | |
761 | void pim_upstream_rpf_genid_changed(struct in_addr neigh_addr) | |
762 | { | |
763 | struct listnode *up_node; | |
764 | struct listnode *up_nextnode; | |
765 | struct pim_upstream *up; | |
766 | ||
767 | /* | |
0f588989 DS |
768 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr |
769 | */ | |
770 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) { | |
12e41d03 DL |
771 | |
772 | if (PIM_DEBUG_PIM_TRACE) { | |
eaa54bdb DW |
773 | char neigh_str[INET_ADDRSTRLEN]; |
774 | char rpf_addr_str[PREFIX_STRLEN]; | |
12e41d03 | 775 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, sizeof(neigh_str)); |
63c59d0c | 776 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, sizeof(rpf_addr_str)); |
05e451f8 | 777 | zlog_debug("%s: matching neigh=%s against upstream (S,G)=%s joined=%d rpf_addr=%s", |
12e41d03 | 778 | __PRETTY_FUNCTION__, |
05e451f8 | 779 | neigh_str, pim_str_sg_dump (&up->sg), |
12e41d03 DL |
780 | up->join_state == PIM_UPSTREAM_JOINED, |
781 | rpf_addr_str); | |
782 | } | |
783 | ||
784 | /* consider only (S,G) upstream in Joined state */ | |
785 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
786 | continue; | |
787 | ||
788 | /* match RPF'(S,G)=neigh_addr */ | |
63c59d0c | 789 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) |
12e41d03 DL |
790 | continue; |
791 | ||
792 | pim_upstream_join_timer_decrease_to_t_override("RPF'(S,G) GenID change", | |
793 | up, neigh_addr); | |
794 | } | |
795 | } | |
796 | ||
797 | ||
798 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
799 | struct interface *old_rpf_ifp) | |
800 | { | |
801 | struct listnode *ifnode; | |
802 | struct listnode *ifnextnode; | |
803 | struct interface *ifp; | |
804 | ||
805 | /* scan all interfaces */ | |
469351b3 | 806 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
807 | struct listnode *chnode; |
808 | struct listnode *chnextnode; | |
809 | struct pim_ifchannel *ch; | |
810 | struct pim_interface *pim_ifp; | |
811 | ||
812 | pim_ifp = ifp->info; | |
813 | if (!pim_ifp) | |
814 | continue; | |
815 | ||
816 | /* search all ifchannels */ | |
817 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
818 | if (ch->upstream != up) | |
819 | continue; | |
820 | ||
821 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
822 | if ( | |
823 | /* RPF_interface(S) was NOT I */ | |
824 | (old_rpf_ifp == ch->interface) | |
825 | && | |
826 | /* RPF_interface(S) stopped being I */ | |
827 | (ch->upstream->rpf.source_nexthop.interface != ch->interface) | |
828 | ) { | |
829 | assert_action_a5(ch); | |
830 | } | |
831 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
832 | ||
833 | pim_ifchannel_update_assert_tracking_desired(ch); | |
834 | } | |
835 | } | |
836 | } | |
837 | ||
838 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
839 | { | |
840 | struct listnode *ifnode; | |
841 | struct listnode *ifnextnode; | |
842 | struct listnode *chnode; | |
843 | struct listnode *chnextnode; | |
844 | struct interface *ifp; | |
845 | struct pim_interface *pim_ifp; | |
846 | struct pim_ifchannel *ch; | |
847 | ||
848 | /* scan all interfaces */ | |
469351b3 | 849 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
850 | pim_ifp = ifp->info; |
851 | if (!pim_ifp) | |
852 | continue; | |
853 | ||
854 | /* scan per-interface (S,G) state */ | |
855 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
856 | ||
857 | if (ch->upstream != up) | |
858 | continue; | |
859 | ||
860 | pim_ifchannel_update_could_assert(ch); | |
861 | ||
862 | } /* scan iface channel list */ | |
863 | } /* scan iflist */ | |
864 | } | |
865 | ||
866 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
867 | { | |
868 | struct listnode *ifnode; | |
869 | struct listnode *ifnextnode; | |
870 | struct listnode *chnode; | |
871 | struct listnode *chnextnode; | |
872 | struct interface *ifp; | |
873 | struct pim_interface *pim_ifp; | |
874 | struct pim_ifchannel *ch; | |
875 | ||
876 | /* scan all interfaces */ | |
469351b3 | 877 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
878 | pim_ifp = ifp->info; |
879 | if (!pim_ifp) | |
880 | continue; | |
881 | ||
882 | /* scan per-interface (S,G) state */ | |
883 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
884 | ||
885 | if (ch->upstream != up) | |
886 | continue; | |
887 | ||
888 | pim_ifchannel_update_my_assert_metric(ch); | |
889 | ||
890 | } /* scan iface channel list */ | |
891 | } /* scan iflist */ | |
892 | } | |
893 | ||
894 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
895 | { | |
896 | struct listnode *ifnode; | |
897 | struct listnode *ifnextnode; | |
898 | struct listnode *chnode; | |
899 | struct listnode *chnextnode; | |
900 | struct interface *ifp; | |
901 | struct pim_interface *pim_ifp; | |
902 | struct pim_ifchannel *ch; | |
903 | ||
904 | /* scan all interfaces */ | |
469351b3 | 905 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
906 | pim_ifp = ifp->info; |
907 | if (!pim_ifp) | |
908 | continue; | |
909 | ||
910 | /* scan per-interface (S,G) state */ | |
911 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
912 | ||
913 | if (ch->upstream != up) | |
914 | continue; | |
915 | ||
916 | pim_ifchannel_update_assert_tracking_desired(ch); | |
917 | ||
918 | } /* scan iface channel list */ | |
919 | } /* scan iflist */ | |
920 | } | |
f14248dd DS |
921 | |
922 | /* | |
923 | * On an RP, the PMBR value must be cleared when the | |
924 | * Keepalive Timer expires | |
925 | */ | |
926 | static int | |
927 | pim_upstream_keep_alive_timer (struct thread *t) | |
928 | { | |
929 | struct pim_upstream *up; | |
930 | ||
931 | up = THREAD_ARG(t); | |
932 | ||
4ed0af70 | 933 | if (I_am_RP (up->sg.grp)) |
25a335e0 | 934 | { |
65e1fcd7 | 935 | pim_br_clear_pmbr (&up->sg); |
25a335e0 DS |
936 | /* |
937 | * We need to do more here :) | |
938 | * But this is the start. | |
939 | */ | |
940 | } | |
14315ea8 DS |
941 | |
942 | pim_mroute_update_counters (up->channel_oil); | |
943 | ||
bebc7290 DS |
944 | if (PIM_DEBUG_MROUTE) |
945 | { | |
946 | zlog_debug ("New: %llu %lu %lu %lu", up->channel_oil->cc.lastused, up->channel_oil->cc.pktcnt, | |
947 | up->channel_oil->cc.bytecnt, up->channel_oil->cc.wrong_if); | |
948 | zlog_debug ("old: %llu %lu %lu %lu", up->channel_oil->cc.lastused, up->channel_oil->cc.oldpktcnt, | |
949 | up->channel_oil->cc.oldbytecnt, up->channel_oil->cc.oldwrong_if); | |
950 | } | |
e3be0432 | 951 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) && |
5f0336ed | 952 | (up->channel_oil->cc.lastused/100 >= qpim_keep_alive_time)) |
14315ea8 DS |
953 | { |
954 | pim_mroute_del (up->channel_oil); | |
d854589a DS |
955 | THREAD_OFF (up->t_ka_timer); |
956 | THREAD_OFF (up->t_rs_timer); | |
957 | THREAD_OFF (up->t_join_timer); | |
63c59d0c | 958 | pim_joinprune_send (up->rpf.source_nexthop.interface, up->rpf.rpf_addr.u.prefix4, |
372eab92 | 959 | up, 0); |
a9b59879 | 960 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM (up->flags); |
5ce79466 | 961 | if (PIM_UPSTREAM_FLAG_TEST_CREATED_BY_UPSTREAM(up->flags)) |
e5905a3b DS |
962 | { |
963 | PIM_UPSTREAM_FLAG_UNSET_CREATED_BY_UPSTREAM(up->flags); | |
964 | pim_upstream_del (up, __PRETTY_FUNCTION__); | |
965 | } | |
14315ea8 | 966 | } |
25a335e0 DS |
967 | else |
968 | { | |
14315ea8 | 969 | up->t_ka_timer = NULL; |
4304f95c | 970 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); |
25a335e0 | 971 | } |
14315ea8 | 972 | |
cb40b272 | 973 | return 1; |
f14248dd DS |
974 | } |
975 | ||
f14248dd DS |
976 | void |
977 | pim_upstream_keep_alive_timer_start (struct pim_upstream *up, | |
978 | uint32_t time) | |
979 | { | |
00d2f9e4 | 980 | THREAD_OFF (up->t_ka_timer); |
f14248dd DS |
981 | THREAD_TIMER_ON (master, |
982 | up->t_ka_timer, | |
983 | pim_upstream_keep_alive_timer, | |
984 | up, time); | |
985 | } | |
cb40b272 DS |
986 | |
987 | /* | |
988 | * 4.2.1 Last-Hop Switchover to the SPT | |
989 | * | |
990 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
991 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
992 | * router, it has the option of switching to receive the traffic on a | |
993 | * shortest path tree (SPT). | |
994 | * | |
995 | * The decision for a router to switch to the SPT is controlled as | |
996 | * follows: | |
997 | * | |
998 | * void | |
999 | * CheckSwitchToSpt(S,G) { | |
1000 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
1001 | * (+) pim_include(S,G) != NULL ) | |
1002 | * AND SwitchToSptDesired(S,G) ) { | |
1003 | * # Note: Restarting the KAT will result in the SPT switch | |
1004 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1005 | * } | |
1006 | * } | |
1007 | * | |
1008 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
1009 | * defined. An "infinite threshold" policy can be implemented by making | |
1010 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
1011 | * first packet" policy can be implemented by making | |
1012 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
1013 | * received for the source and group. | |
1014 | */ | |
1015 | int | |
4ed0af70 | 1016 | pim_upstream_switch_to_spt_desired (struct prefix_sg *sg) |
cb40b272 | 1017 | { |
4ed0af70 | 1018 | if (I_am_RP (sg->grp)) |
a3b58b4a DS |
1019 | return 1; |
1020 | ||
cb40b272 DS |
1021 | return 0; |
1022 | } | |
d7259eac | 1023 | |
80d9c3a0 DS |
1024 | int |
1025 | pim_upstream_is_sg_rpt (struct pim_upstream *up) | |
1026 | { | |
1027 | // FIXME: When we implement the ability to | |
1028 | // receive a s,g,rpt prune this can be modified | |
1029 | return 0; | |
1030 | } | |
1031 | ||
d7259eac | 1032 | const char * |
c9802954 | 1033 | pim_upstream_state2str (enum pim_upstream_state join_state) |
d7259eac | 1034 | { |
c9802954 | 1035 | switch (join_state) |
d7259eac DS |
1036 | { |
1037 | case PIM_UPSTREAM_NOTJOINED: | |
e775c0a4 | 1038 | return "NotJoined"; |
d7259eac DS |
1039 | break; |
1040 | case PIM_UPSTREAM_JOINED: | |
e775c0a4 | 1041 | return "Joined"; |
d7259eac DS |
1042 | break; |
1043 | case PIM_UPSTREAM_JOIN_PENDING: | |
e775c0a4 | 1044 | return "JoinPending"; |
d7259eac DS |
1045 | break; |
1046 | case PIM_UPSTREAM_PRUNE: | |
1047 | return "Prune"; | |
1048 | break; | |
1049 | } | |
e775c0a4 | 1050 | return "Unknown"; |
d7259eac | 1051 | } |
627ed2a3 DS |
1052 | |
1053 | static int | |
1054 | pim_upstream_register_stop_timer (struct thread *t) | |
1055 | { | |
4df01a4e | 1056 | struct pim_interface *pim_ifp; |
627ed2a3 DS |
1057 | struct pim_upstream *up; |
1058 | struct pim_rpf *rpg; | |
1059 | struct ip ip_hdr; | |
627ed2a3 DS |
1060 | up = THREAD_ARG (t); |
1061 | ||
79ce47c0 | 1062 | THREAD_TIMER_OFF (up->t_rs_timer); |
627ed2a3 DS |
1063 | up->t_rs_timer = NULL; |
1064 | ||
1065 | if (PIM_DEBUG_TRACE) | |
1066 | { | |
d5ed8a9c DS |
1067 | zlog_debug ("%s: (S,G)=%s upstream register stop timer %s", |
1068 | __PRETTY_FUNCTION__, pim_str_sg_dump (&up->sg), | |
c9802954 | 1069 | pim_upstream_state2str(up->join_state)); |
627ed2a3 DS |
1070 | } |
1071 | ||
1072 | switch (up->join_state) | |
1073 | { | |
1074 | case PIM_UPSTREAM_JOIN_PENDING: | |
1075 | up->join_state = PIM_UPSTREAM_JOINED; | |
bb027ee8 DS |
1076 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); |
1077 | break; | |
1078 | case PIM_UPSTREAM_JOINED: | |
627ed2a3 DS |
1079 | break; |
1080 | case PIM_UPSTREAM_PRUNE: | |
4df01a4e | 1081 | pim_ifp = up->rpf.source_nexthop.interface->info; |
7ef66046 DS |
1082 | if (!pim_ifp) |
1083 | { | |
1084 | if (PIM_DEBUG_TRACE) | |
1085 | zlog_debug ("%s: Interface: %s is not configured for pim", | |
1086 | __PRETTY_FUNCTION__, up->rpf.source_nexthop.interface->name); | |
1087 | return 0; | |
1088 | } | |
627ed2a3 DS |
1089 | up->join_state = PIM_UPSTREAM_JOIN_PENDING; |
1090 | pim_upstream_start_register_stop_timer (up, 1); | |
1091 | ||
4ed0af70 | 1092 | rpg = RP (up->sg.grp); |
627ed2a3 DS |
1093 | memset (&ip_hdr, 0, sizeof (struct ip)); |
1094 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
1095 | ip_hdr.ip_hl = 5; | |
1096 | ip_hdr.ip_v = 4; | |
4ed0af70 DS |
1097 | ip_hdr.ip_src = up->sg.src; |
1098 | ip_hdr.ip_dst = up->sg.grp; | |
dc686f82 | 1099 | ip_hdr.ip_len = htons (20); |
627ed2a3 | 1100 | // checksum is broken |
4df01a4e DS |
1101 | pim_register_send ((uint8_t *)&ip_hdr, sizeof (struct ip), |
1102 | pim_ifp->primary_address, rpg, 1); | |
627ed2a3 DS |
1103 | break; |
1104 | default: | |
1105 | break; | |
1106 | } | |
1107 | ||
1108 | return 0; | |
1109 | } | |
1110 | ||
1111 | void | |
1112 | pim_upstream_start_register_stop_timer (struct pim_upstream *up, int null_register) | |
1113 | { | |
1114 | uint32_t time; | |
1115 | ||
1116 | if (up->t_rs_timer) | |
1117 | { | |
1118 | THREAD_TIMER_OFF (up->t_rs_timer); | |
1119 | up->t_rs_timer = NULL; | |
1120 | } | |
1121 | ||
1122 | if (!null_register) | |
1123 | { | |
1124 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1125 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1126 | time = lower + (random () % (upper - lower + 1)) - PIM_REGISTER_PROBE_PERIOD; | |
1127 | } | |
1128 | else | |
1129 | time = PIM_REGISTER_PROBE_PERIOD; | |
1130 | ||
1131 | if (PIM_DEBUG_TRACE) | |
1132 | { | |
05e451f8 DS |
1133 | zlog_debug ("%s: (S,G)=%s Starting upstream register stop timer %d", |
1134 | __PRETTY_FUNCTION__, pim_str_sg_dump (&up->sg), time); | |
627ed2a3 DS |
1135 | } |
1136 | THREAD_TIMER_ON (master, up->t_rs_timer, | |
1137 | pim_upstream_register_stop_timer, | |
1138 | up, time); | |
1139 | } | |
4fdc8f36 DS |
1140 | |
1141 | /* | |
1142 | * For a given upstream, determine the inherited_olist | |
1143 | * and apply it. | |
219e0013 DS |
1144 | * |
1145 | * inherited_olist(S,G,rpt) = | |
1146 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1147 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1148 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1149 | * | |
1150 | * inherited_olist(S,G) = | |
1151 | * inherited_olist(S,G,rpt) (+) | |
1152 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1153 | * | |
4fdc8f36 DS |
1154 | * return 1 if there are any output interfaces |
1155 | * return 0 if there are not any output interfaces | |
1156 | */ | |
1157 | int | |
1158 | pim_upstream_inherited_olist (struct pim_upstream *up) | |
1159 | { | |
219e0013 DS |
1160 | struct pim_interface *pim_ifp; |
1161 | struct listnode *ifnextnode; | |
1162 | struct listnode *chnextnode; | |
1163 | struct pim_ifchannel *ch; | |
1164 | struct listnode *chnode; | |
1165 | struct listnode *ifnode; | |
1166 | struct interface *ifp; | |
219e0013 DS |
1167 | int output_intf = 0; |
1168 | ||
3667b0bc | 1169 | pim_ifp = up->rpf.source_nexthop.interface->info; |
da55afba | 1170 | if (pim_ifp && !up->channel_oil) |
3667b0bc | 1171 | up->channel_oil = pim_channel_oil_add (&up->sg, pim_ifp->mroute_vif_index); |
219e0013 | 1172 | |
7a3ddda5 | 1173 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) |
219e0013 | 1174 | { |
7a3ddda5 DS |
1175 | pim_ifp = ifp->info; |
1176 | if (!pim_ifp) | |
1177 | continue; | |
219e0013 | 1178 | |
7a3ddda5 DS |
1179 | for (ALL_LIST_ELEMENTS (pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) |
1180 | { | |
1181 | if (pim_upstream_evaluate_join_desired_interface (up, ch)) | |
219e0013 | 1182 | { |
7a3ddda5 DS |
1183 | pim_channel_add_oif (up->channel_oil, ifp, PIM_OIF_FLAG_PROTO_PIM); |
1184 | output_intf++; | |
219e0013 DS |
1185 | } |
1186 | } | |
1187 | } | |
1188 | ||
483eef9d DS |
1189 | /* |
1190 | * If we have output_intf switch state to Join and work like normal | |
1191 | * If we don't have an output_intf that means we are probably a | |
1192 | * switch on a stick so turn on forwarding to just accept the | |
1193 | * incoming packets so we don't bother the other stuff! | |
1194 | */ | |
1195 | if (output_intf) | |
1196 | pim_upstream_switch (up, PIM_UPSTREAM_JOINED); | |
1197 | else | |
1198 | forward_on (up); | |
219e0013 DS |
1199 | |
1200 | return output_intf; | |
4fdc8f36 | 1201 | } |
d3dd1804 | 1202 | |
80d9c3a0 DS |
1203 | int |
1204 | pim_upstream_empty_inherited_olist (struct pim_upstream *up) | |
1205 | { | |
1206 | // FIXME: Currently this is not implemented | |
1207 | return 0; | |
1208 | } | |
1209 | ||
d3dd1804 DS |
1210 | /* |
1211 | * When we have a new neighbor, | |
1212 | * find upstreams that don't have their rpf_addr | |
1213 | * set and see if the new neighbor allows | |
1214 | * the join to be sent | |
1215 | */ | |
1216 | void | |
1217 | pim_upstream_find_new_rpf (void) | |
1218 | { | |
1219 | struct listnode *up_node; | |
1220 | struct listnode *up_nextnode; | |
1221 | struct pim_upstream *up; | |
1222 | ||
1223 | /* | |
0f588989 DS |
1224 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr |
1225 | */ | |
1226 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) | |
d3dd1804 | 1227 | { |
63c59d0c | 1228 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) |
d3dd1804 DS |
1229 | { |
1230 | if (PIM_DEBUG_PIM_TRACE) | |
1231 | zlog_debug ("Upstream %s without a path to send join, checking", | |
1232 | pim_str_sg_dump (&up->sg)); | |
1233 | pim_rpf_update (up, NULL); | |
1234 | } | |
1235 | } | |
1236 | } | |
0f588989 | 1237 | |
0f588989 DS |
1238 | static unsigned int |
1239 | pim_upstream_hash_key (void *arg) | |
1240 | { | |
1241 | struct pim_upstream *up = (struct pim_upstream *)arg; | |
1242 | ||
1243 | return jhash_2words (up->sg.src.s_addr, up->sg.grp.s_addr, 0); | |
1244 | } | |
1245 | ||
1246 | void pim_upstream_terminate (void) | |
1247 | { | |
1248 | if (pim_upstream_list) | |
1249 | list_free (pim_upstream_list); | |
1250 | pim_upstream_list = NULL; | |
1251 | ||
1252 | if (pim_upstream_hash) | |
1253 | hash_free (pim_upstream_hash); | |
1254 | } | |
1255 | ||
1256 | static int | |
1257 | pim_upstream_equal (const void *arg1, const void *arg2) | |
1258 | { | |
1259 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; | |
1260 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
1261 | ||
1262 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) && | |
1263 | (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
1264 | return 1; | |
1265 | ||
1266 | return 0; | |
1267 | } | |
1268 | ||
9c5e4d62 DS |
1269 | /* |
1270 | * Code to check and see if we've received packets on a S,G mroute | |
1271 | * and if so to set the SPT bit appropriately | |
1272 | */ | |
1273 | static void | |
1274 | pim_upstream_sg_running (void *arg) | |
1275 | { | |
1276 | struct pim_upstream *up = (struct pim_upstream *)arg; | |
1277 | ||
1278 | zlog_debug ("%s: %s work", __PRETTY_FUNCTION__, | |
1279 | pim_str_sg_dump (&up->sg)); | |
1280 | } | |
1281 | ||
040d86ad DS |
1282 | void |
1283 | pim_upstream_init (void) | |
0f588989 | 1284 | { |
9c5e4d62 DS |
1285 | pim_upstream_sg_wheel = wheel_init (master, 31000, 100, |
1286 | pim_upstream_hash_key, | |
1287 | pim_upstream_sg_running); | |
0f588989 DS |
1288 | pim_upstream_hash = hash_create_size (8192, pim_upstream_hash_key, |
1289 | pim_upstream_equal); | |
1290 | ||
1291 | pim_upstream_list = list_new (); | |
1292 | pim_upstream_list->del = (void (*)(void *)) pim_upstream_free; | |
03417ccd | 1293 | pim_upstream_list->cmp = pim_upstream_compare; |
0f588989 DS |
1294 | |
1295 | } |